2.a3 Bb4?? 3.ab4+– d6 4.c3 Bd7 5.Nf3 Nc6 6.e3 Nb4? (6...e5+–) 7.cb4 a5 (7...e5 8.e4+–) 8.ba5 Ra5 (8...e5+–) 9.Ra5 b6 10.Ra3 b5 11.Be2 Nf6 12.0-0 0-0 13.d4 Qe7 14.Bb2 Rb8 15.Nbd2 Bc6 16.Rb3 Ne4 (16...b4 17.Qa1+–) 17.Ne4 Be4 18.Bd3 Bd3 19.Qd3 c5 (19...b4 20.Qc3! c5 21.dc5+–) 20.dc5 dc5 21.Qc3 (better is 21.Rb5 Rb5 22.Qb5 Qd8+–) 21...Rd8 (21...f6+–) 22.Qg7 1–0. Fournier,Frederic (1925) – Borromeo, Active Blind, 2008.

2.a3 d6 3.Bb2 (--> 2.Bb2 d6 3.a3).

2.a3 f6 3.Bb2 d6 (---> 2.Bb2 f6 3.a3 d6).

2.a3 g5 3.Bb2+= f6 4.e3 Bg7 5.c4 Nh6+= 6.Be2 0-0 7.Nf3 g4 8.Nh4 b6 9.d4 Bb7 10.Bg4+/– Ng4 11.Qg4 f5 12.Qg3 d5 13.Nd2 dc4 14.d5! f4?? 15.Qg7 1–0. Whiterose – crazy 8, ChessWorld.net, 2005.

2.a3 h6 3.e4 Nf6 4.e5 Nd5 5.c4 Ne7 6.d4 d5 7.Nc3 c6 8.Nf3 Nf5 9.c5 b5 (9...b6!?+=) 10.a4+/– ba4 11.Qa4 Be7 12.Bd3 0-0 13.0-0 Re8 14.Bf4 Nh4 15.Nh4 Bh4 16.Rfc1 Nd7? 17.Qc6 Rb8 18.Qa4 Rb7 (18...Nf8 19.Nb5 Ng6 20.Bg6 fg6 21.Na7+–) 19.c6 Rc7 20.cd7 Bd7 21.b5 Qb8 22.Ne2 Rb7 23.Rab1 a6 (23...Be7 24.Qa5+–) 24.Qa6 Bc8 (24...Be7 25.Qa5+–) 25.Qd6 Rd7 (25...Bd7 26.Qb8 Reb8+–) 26.Qb8 (26.Qb8 Rdd8 27.Bd2+–) 1–0. pozarski (1985) – NN, GameColony.com, 2002.

2.a3 Nh6 3.e4 Qf6 4.c3 Bd6 5.Nf3 Ng4 6.Be2 Bf4 7.g3 Bd6 8.Qc2 h5 9.d4+/– h4? 10.Bg5 Qg6 11.gh4 f6 12.Be3 e5 13.Nbd2 f5 14.ef5+– Qf6? 15.Ne4 Qf5?? 16.Nd6 cd6 17.Qf5 Ne3 18.fe3 Rf8 19.Qg6 Kd8 20.Qd6 Rf6 21.Qe5 d6 22.Qg5 Nd7 23.Qg7 Kc7 24.d5 Rf5 25.e4 Rf3 26.Bf3 Kb8 27.Qe7 a6 28.Qd6 Ka7 29.a4 Rb8 30.b5 Nb6 31.ba6 ba6 32.Rg1 Nd7 33.Kf2 Rb2 34.Be2 Rb6 35.Qc7 Rb7 36.Qc8 Nb6 37.Qc5 Rf7 38.Ke1 Rb7 39.Rb1 Ka8 40.a5 Rb8 41.Qc6 Rb7 42.Rg8 Ka7 43.ab6 Rb6 44.Qb6 1–0. jimmyjf – tonycally, ChessWorld.net, 2004.

2.Ba3 b5 3.Nf3 Nf6 4.Nc3 c6 5.e4 a5–+ 6.e5 ab4 7.ef6 Qf6 8.Ne4 Qf5?? 9.Nd6?? Bd6–+ 10.Bb2 Bb7 11.Bg7 Rg8 12.Bd3 Qg4 13.Bb2 h6 14.Be5? Be5 15.Ne5 Qd1 16.Kd1 Rg2 17.Ke2 c5 18.Bb5 Rg5 19.f4 Rg2 20.Kd3 Ra3 21.c3 bc3 22.dc3 Rga2 23.Ra2–/+ Ra2 24.Rg1 Nc6 25.Rg8 Ke7 26.Bc4? Ne5–+ 27.fe5 Rh2 28.Rg3 Bg2 29.Ke3 Bd5 30.Be2 Rh4 31.Bg4 h5 32.Bh3 Re4 33.Kd2 Re5 34.Rg1 Kd6 35.Bf1 h4 36.c4 Bc6 37.Bh3 Re4 38.Kd3 Rd4 39.Kc3 Rf4 40.Rd1 Ke7 41.Kb3 (41.Rf1 Rf1 42.Bf1–+) 0–1. pinecrest1981 – fresh, caissa.com, 2004.

2.Ba3 c5 3.bc5+= Na6 4.d4+/– Nh6 5.e4 Qf6 6.e5 Qf5 7.h3 Be7 8.g4?? Qe4–+ 9.Qe2 Qh1 10.Nf3 Ng4! 11.hg4 Qh6 12.Nbd2 f6 13.0-0-0 fe5 14.Ne5 0-0 15.Nef3 Qf4 16.g5 Bg5 17.Qe3?? Qf3! 18.Qg5 Qa3 19.Kb1 Nb4 20.Bc4 Qc3 21.Rc1 Rf2 22.d5 Qd2 23.Qd2 Rd2 24.Bb3 Nd5 (24...Nd5 25.Kb2 Nf6–+) 0–1. breaker – tonycally, ChessWorld.net, 2004.

2.Ba3 c6 3.d4 d5 4.e3 Nf6 5.c4 Be7 6.Nc3 0-0 7.Qb3 b6 8.Nf3 c5 (8...Qd6!?=) 9.bc5+= bc5 10.dc5 Nc6 11.cd5 ed5 12.Rd1 Na5 13.Qc2 (13.Nd5? Nb3 14.Nf6 Bf6 15.Rd8 Rd8-+) 13...Nc4? (better 13...Nb7!? 14.Nd4 Bc5 15.Bc5 Nc5+/-) 14.Bc4+- dc4?? (14...Qa5 15.Bd3 Qa3 16.Nd5 Nd5 17.Bh7 Kh8 18.Rd5 g6 19.Bg6 fg6+/-) 15.Rd8 Bd8 (15...Rd8 16.Nb5+-) 16.0-0 Bg4 17.Qe2 (17.Ne4 Be7+-) 17...Bh5 (17...Ba5 18.Rc1+-) 18.Qc4 Bg6 (18...Re8 19.Rc1+-) 19.Nd4 (better 19.c6 Re8 20.c7 Rc8 21.cd8Q Red8+-) 19...Ba5 (19...Re8 20.c6 Bc7 21.Ncb5+-) 20.Bb4 Bb4 21.Qb4 Rac8 (21...a5 22.Qa4+-) 22.a4 (22.Qa5 a6+-) 22...Rfd8 23.Re1 Rd7 (23...a6 24.Qa5+-) 24.Rd1 (24.c6 Rdd8+-) 24...Rdc7 (24...Bh5 25.c6 Rdd8 26.Rc1+-) 25.c6 h6 (25...Ra8+-) 26.Nd5! Nd5 27.Qc5 Nf6 28.Nb5 (better 28.f3!? Nd7 29.Qb5 Nb8+-) 28...Rc6 29.Qa7 Rc1 30.Rf1?? (30.Qd4!? R1c4 31.Qa1 Rb4+-) 30...Rf1?? (better 30...Bd3 31.h3 Rf1 (31...Bf1?! 32.Nd6-/+) 32.Kh2 Rf2-+) 31.Kf1+- Rc1 32.Ke2 Bh5? (32...Rc2 33.Kd1 Ng4+-) 33.f3 Bg6 34.f4 (better 34.Kf2 Rd1+-) 34...Rc2 35.Kf3?? (better 35.Ke1 Rc1 36.Kf2 Ne4 37.Ke2 Rc2 38.Kd3 Rg2 39.h4+-) 35...Be4-+ 36.Kg3 Rg2 37.Kh4 (37.Kh3 Ng4 38.Qf7 Kf7 39.Nd6 Ke6 40.Ne4 Ne3 41.a5-+) 37...g5 (37...Rg4 38.Kh3 Bg2) 38.fg5 (38.Kh3 g4 39.Kh4 Rh2 40.Kg3 Rh3 41.Kf2 g3 42.Ke1-+) 38...hg5 (38...Rg4 39.Kh3 Bg2) 39.Kh3-+ g4 (better 39...Ng4 40.Qb8 Kg7-+) 40.Kh4+- Rh2 41.Kg5 Kg7 42.Qb8?? (better 42.Nd6 Rh5 43.Kf4+-) 42...Rh5= 43.Kf4 Rf5 44.Kg3 Rf3 45.Kh4 (45.Kg2 Rh3 46.Kf2 g3 47.Qg3 Rg3 48.Kg3-+) 45...Rh3?? (better 45...Kg6 46.Qh2 Bf5-+) 46.Kg5-/+ Rh5 47.Kf4 Rf5 48.Kg3 Rf3 49.Kh4 Rh3 (better 49...Kg6 50.Qh2 Bf5-+) 50.Kg5= Rh5 ½-½. PetLot (1850) - jiacomo (1735), Weekly Bullet Arena, lichess.org, 2017.

2.Ba3 d6 3.b5 (3.e4 Nf6=+) 3...b6 4.Nf3 Qe7 (4...a6 5.e3=) 5.d4 Qd7 6.e3 Bb7 7.Ng5 f6 (7...a6 8.c4=+) 8.Nh3 Qe7 9.Nf4 Nd7 (better 9...g5 10.Nd3 a6=) 10.Bc4+/- Nh6 (10...e5!? 11.Qh5 Kd8+/-) 11.Ne6+- Nb8 12.Qh5 (12.Nf8?! Kf8 13.Nc3 a6+-) 12...g6 13.Qh3 Bc8? (better 13...a6+-) 14.Qf3 c6 15.bc6 Be6 16.c7! Bc4 (16...Qc7 17.Qa8 Discovered attack (17.Be6 Deflection)) 17.c8Q (17.c8Q Qd8 18.Qe4 (18.Qa8?! Qc8 19.Nd2 Ba6=; 18.Qc4 Nd7 19.Qe6 Be7 20.Bd6 Nf5 21.Be7 Ne7+-) 18...Be7 19.Qd8 (19.Qa8?! Qc8 20.Nd2 Bg8+=; 19.Qc4 Nd7+-) 19...Kd8 20.Qa8+-; 17.cb8B?! Rb8 18.Qc6 Kd8 19.Qc4 Rc8+/-; 17.cb8N?! Rb8 18.Qc6 Kd8 19.Qc4 Rc8+/-) 1-0. venaverme – mrfluke, gameknot.com, 2018.

2.Ba3 Be7 3.g3 a5 4.Nc3?? (better is 4.b5=) 4...ab4–+ (4...Bb4?! 5.Bb2–/+) 5.Bb4 Bb4 6.Rb1 (6.Nb5 d5–+) 6...Bc3 7.dc3 Ra2 8.Ra1 Ra1 9.Qa1 b6 10.Bg2 Na6 11.Be4 f5 12.Ba8 Ne7 13.Nf3 0-0 14.0-0 Nc5 15.Kg2 (15.Nd4 d5 16.Nc6 Nc6 17.Bc6 Ba6–+) 15...Bb7 (better is 15...Ba6 16.c4 Qa8–+) 16.Qa7 (16.Bb7 Nb7 17.Qa4–+) 16…Ba8 0–1. chessdudesam – maddoxdb, gameknot.com, 2012.

2.Ba3 g6 3.b5 Bg7 4.c3 Ne7 5.e4 d6 6.d4 b6 7.Nf3 Bb7 8.Bd3 Nd7 9.0-0 0-0 10.Ng5 h6 11.Nf3 f5 12.ef5 gf5 13.Nh4 Nf6 14.Nf3 Ne4 15.Qe1 Ng6 16.Nfd2 Nf4–/+ 17.Ne4?? Nd3–+ 18.Qe2 fe4 19.Nd2 Nf4 20.Qe3 Qg5 21.g3 Nh3 22.Kg2 Qe3 23.fe3 Ng5 24.h4 Rf1 25.Rf1 Nf3 26.Nb3 a6 27.Ra1 ab5 28.Bb2 Bd5 29.Nc1 Bc4 30.a3 h5 31.Kf2 Bh6 32.Ne2 Rf8 33.Nf4 Bf4 34.gf4 Rf7 35.a4 Nh4 36.ab5 Bb5 37.Ra8 Kh7 38.Kg3 Nf5 39.Kf2 Rg7 40.Rc8 h4 41.Ra8 h3 42.Ra1 Rg6 43.Rh1 Rh6 44.d5 ed5 45.c4 Bc4 46.Bd4 b5 47.Ke1 b4 48.Rg1 c5 49.Bg7 0–1. pinecrest1981 – Alacran, caissa.com, 2004.

2.a4?? Nc6 3.b5 Ne5 4.Bb2 Nc4 5.Bc3 d5 6.e4 de4 7.Bc4 Nh6 8.Qe2 Bd6 9.Qe4 e5 10.d4 Be7 11.Qe5 Ng4 12.Qg7 Rf8 13.Qh7 Qd6 14.Nf3 Bd7 15.Nbd2 0-0-0 16.Ne4 Qb6 17.a5 Qh6 18.Qh6 a6 19.Qf8 ab5 20.Qd8 Kd8 21.Bf7 b4 22.Bb2 b6 23.ab6 cb6 24.h3 Nf2 25.Kf2 Bc6 26.d5 Bd5 27.Bd5 b5 28.Ra7 Ke8 29.Bh8 b3 30.cb3 b4 31.Ne5 Kd8 32.Nf7 Ke8 33.Rc1 Bh4 34.g3 Bd8 35.Re1 Bb6 36.Nc5 Kf8 37.Ra8 Bd8 38.Rd8 Black king mated 1–0. themuttsknutts (1625) – philos, ChessWorld.net, 2011. (=1.a4 e6 2.b4 Nc6)

2.Bb2 g6?? 3.Bh8 f6 4.a3 Kf7 5.d4 Nh6 6.e4 Kg8 7.Bf6 Qf6 8.e5 Qf4 9.Nc3 Ng4?? (9...Nc6 10.Nf3 d5+–) 10.Nh3 Qf5 11.Bd3 Qh5 12.Be2 Qh3 (12...Qh4 13.Bg4 d6+–) 13.gh3 Nh6 14.h4 d5 15.h5 g5 16.h4 (better is 16.Qd2 Be7+–) 16...Nf7 17.hg5 Ng5 18.Rg1 h6 19.f4 Be7 20.fg5 Bg5 21.Qd3 Kh8 (21...Nd7 22.Qg6 Kf8 23.Rf1 Bf6 24.ef6 Nf6 25.Rf6 Ke7 26.Qg7 Kd6 27.Nb5 Kc6 28.Qc7) 22.Qg6 Nc6 (22...a6 23.Bd3 Bh4 24.Ke2 Nc6 25.Qh6) 23.Rg5 hg5 24.h6 Nd4 25.Qg7 1–0. Fritz11 – jumbo, casual, 2013.

2.b5 f6 3.Bb2 (--> 2.Bb2 f6 3.b5).

2.b5 g5 3.Bb2 f6 4.e4+= e5 5.Qh5+/– Ke7 6.Nc3 Nh6 7.Nd5+– Ke6 8.Bc4 d6?? 9.Nc7 Kd7 10.Na8 b6 11.Bd5 Ke7 12.Qe2 Bg4 13.Qc4 Ke8 14.h4 Bg7 15.d4 Nd7 16.f3 Bh5 17.Nc7 Kf8 18.Ne6 Ke8 19.hg5 Bg6 20.gh6 Bf8 21.Nd8 Kd8 22.Qc6 Be7 23.Be6 Ke8 24.Qc8 Bd8 25.Qd7 Kf8 26.Qg7 Ke8 27.Bd7 1–0. Taulien,Hans_Juergen – Franziska,Franzi, remoteschach.de, 2002.

2.b5 h5 3.e4 a6 4.d4 c6 5.ba6 ba6 6.Nf3 Bb4 7.c3 Bd6 8.Bd3 Qe7 9.Bg5 f6 10.Nh4?? fg5+– 11.Ng6 Qf7?! 12.Nh8 Qf6 13.Qh5 Ke7 14.e5 Be5 15.Ng6 Qg6 16.Bg6 Bf6 17.Qh8 Kf8 18.0-0 d6 19.Bh7 Nd7 20.Re1 g4 21.Re6 a5 22.Qg8 1–0. Taulien,Hans_Juergen – Tone,Gollen, remoteschach.de, 2002.

2.c3 Na6 3.Bb2 c5 4.bc5 Nc5 5.e3 Na6 6.Nf3 Qc7 7.Qc1 Bc5 8.Be2 Ne7 9.d4 Bd6 10.0-0 Ng6 11.Nbd2 0-0 12.a3 Re8 13.c4 Be7 14.c5 d5 15.Bc3 Bd7 16.Rb1 Bf6 17.Bd3 Re7 18.Qc2 Rae8 19.Ba6 ba6 20.Qd3 (20.Rb2 Bb5 21.Rc1 Qc6+/–) 20...e5 (20...Bb5 21.Rb5 ab5 22.Qb5+=) 21.Rfe1?? (21.de5 Ne5 22.Be5 Be5+/–) 21...ed4?? (21...e4 22.Qa6 ef3 23.Ba5–/+) 22.ed4 (22.Bd4!? Bd4 23.Qd4+/–) 22...Re1 23.Re1 Re1 24.Ne1 Bd4?? (24...Nf4 25.Qf3 Bb5+=) 25.Bd4 (better is 25.Qd4 f6 26.Qd5 Kf8+–) 25...Nf4 26.Qc3?? (26.Qe3 Ne6+–) 26...Ne6 (better is 26...Ne2 27.Kf1 Nc3 28.Bc3 Qc5–+) 27.Qa1 Nd4 28.Qd4 Qa5 (28...Bc6 29.Nd3+–) 29.Qe3 (better is 29.Qd5!? Be8+–) 29...Bc6 30.Ndf3 d4 (30...h6 31.Qe7+–) 31.Nd4 (better is 31.Qe7 h6 32.Nd4+–) 31...Qb5 (31...Qc5 32.Nd3 Qd6+–) 32.Nb5 Bb5 33.Qc3 h6 34.Qc1 (34.c6 a5+–) 34...f5 35.c6 Bc6 36.Qc6 (36.Qc6 g5 37.Qg6 Kf8 38.Qh6 Kf7 39.Qg5 Ke6 40.Qg6 Ke5 41.Nf3 Kd5 42.Qf5 Kd6 43.Qf6 Kd5 44.Qe5 Kc4 45.Qd4 Kb3 46.Qd3 Ka2 47.Nd4 Ka1 48.Qc2 a5 49.Nb3) 1–0. Fournier,Frederic (1900) – alekos (2005), Active Blind, 2008.

2.c3 b5 3.e4 a6 4.d3 e5 5.Nf3 Nc6 6.Nbd2 h6 7.Be2 Qf6 8.0-0 d6 9.a3 Qg6 10.Nh4 Qg5 11.g3 Be7 12.Ndf3 Qf6+= 13.Ra2 g5 14.Nf5 Bf5 15.ef5 Qf5 16.Be3 h5 17.Qd2 f6 18.Ne1 g4 19.Ng2 h4 20.Nh4 Qh5 21.Qd1?? f5=+ 22.Kg2?? Bh4–+ 23.gh4 Qh4 24.Rh1 f4 25.Bc1 f3 26.Bf3 Qh3 27.Kg1 gf3 28.Bg5 Qg2 0–1. sburritt – nwishn (1900), net–chess.com, 2006.

2.c3 Qg5 3.e3 Qg6 4.Bb2 Bd6 5.Nf3 c6 6.d4 b5 7.Bd3 f5 8.g3 Bb7 9.Nbd2 h6 10.Qc2 Nf6 11.a3 c5? (better is 11...a5+=) 12.dc5+– Bc7 13.0-0 Nc6 14.Rad1 0-0 15.Be2 e5 16.Rfe1 Kh8 17.Nf1 e4 18.Nh4 f4?? (better is 18...Qg5+–) 19.Ng6 Kg8 20.Nf8 Kf8 21.ef4 e3 22.Ne3 Ne7 23.Bf1 (23.c4 Neg8+–) 23...Rc8 24.Bg2 Bg2 25.Kg2 Bb6 26.cb6 ab6 27.h4 Ned5 28.Nd5 Nd5 29.c4 bc4 (29...Rc5 30.Rd5 Rc6 31.Qh7 Re6 32.Bg7 Ke8 33.Qg8 Ke7 34.Qf8) 30.Qc4! Rc4 (30...Rc4 31.Rd4 Double attack (31.Rd4 Decoy)) 31.Rd5 Rb4 32.ab4 Kg8 (32...d6 33.Rf5 Kg8 34.Re7 Kh7 35.Rg7 Kh8 36.Rf8) 33.Be5 (33.Rd7 Kf8 34.Bg7 Kg8 35.Bh6 b5 36.Re8) 33...Kh7 (33...d6 34.Rd6 Kf8 35.Rb6 h5 36.Rb7 Kg8 37.Rg7 Kh8 38.Rc7 Kg8 39.Rd1 Kf8 40.Rd8) 34.Red1 (34.Rd7 Kg6 35.Rg7 Kf5 36.g4 Ke6 37.Rd1 b5 38.Rd6) 34...g6 (34...Kg6 35.Rd6 Kh7 36.Rd7 Kg6 37.Rg7 Kh5 38.g4 Kh4 39.Bf6) 35.Rd7 (35.Rd7 Kg8 36.Rg7 Kf8 37.Rd8) 1–0. Fournier,Frederic (1865) – masmago (1760), Active, 2008.

2.c3 Nh6 3.Nf3 Qf6 4.g3 e5 5.h4 d5 6.d3 Qc6 7.Ne5+= Qf6 8.f4 Ng4 9.Ng4 Bg4= 10.Bh3 Be6 11.Ba3 a6 12.Be6 Qe6= 13.d4 Qe3 14.Rh3 Qg1 15.Kd2+= Qg2 16.Qh1 Qh1 17.Rh1 c6 18.Kd3 Nd7 19.e3 b6 20.g4 a5+= 21.ba5 Ra5 22.Bb4 Bb4 23.cb4+/– Ra8 24.g5 g6 25.Rc1 Rc8 0–1. sbderkach (1680) – nwishn (1900), net–chess.com, 2006.

2.Nc3?? Be7 3.a3 d6 4.Nf3 Bd7 5.Bb2 Nc6 6.e3 Nf6 7.b5 Na5 8.a4 a6 9.Rb1 ab5 10.Nb5 c6 11.Na3 h6 12.Bd3 g5 13.0-0= b6 14.Bd4 c5 15.Ba1 Rh7?? 16.Bh7 Nh7 17.g3 Rb8? 18.Nb5+– Bb5 19.Rb5 Nb7 20.c4 Qd7 21.Rb6 d5 22.Qb1 dc4 23.Qh7 Qa4 24.Qh8 Kd7 25.Qb8 Bd6 26.Qb7 Bc7 27.Ne5 Ke7 28.Qc7 Kf6 29.Qf7 1–0. esko – flocanstein, net–chess.com, 2001.

2.c4?? d5 3.c5 b6 4.c6? Nc6 (4...Qf6 5.Nc3 Bb4 6.Nf3 Nc6 7.Bb2 Bc3 8.Bc3–+) 5.b5 Nd4 6.a4 a6 7.e3 Nf5 8.g4 Nd6 9.ba6 Ba6 10.Ba6 Ra6 11.Qe2 Qa8 12.Ba3 (12.d3–+) 12...Ra4 13.Nh3 (13.Ra2–+) 13...Ra3 (better 13...Nc4–+) 14.Ra3 Qb7 15.0-0 Nc4 16.Rc3 (16.Ra2 Nh6=) 16...Nf6=+ 17.g5 Ne4 18.Rc4 (better 18.Rc2!? Nc5 19.d3=+) 18...dc4–/+ 19.Qc4 Bd6 20.Nf4? (better 20.Qb5!? Kf8 21.f3–/+) 20...Bf4 (better 20...b5!? 21.Qd4 Ng5 22.Qg7 Nf3 23.Kh1 Nd2 24.Ng2 Nf1 25.Qh8 Ke7 26.Kg1–+) 21.ef4 0-0 22.d3 Nd6 23.Qd4 Nf5 24.Qc3?? (24.Qe4 Qa6 25.Qc4–+) 24...Rd8 (better 24...Nh4 25.f3 Nf3 26.Kf2 Nh2 27.Nd2 Nf1 28.Kf1 Qh1 29.Ke2–+) 25.d4 (25.Nd2 Nd4 26.Re1 c5–+) 25...Qe4 (better 25...Nd4 26.Re1 Nf3 27.Kf1 Nh2 28.Kg1 Nf3 29.Kf1 Ne1 30.Qe1 Qf3–+) 26.Nd2? (better 26.Qc7 Qa8 27.d5 Qd5 28.Nc3–+) 26...Qd4 27.Qd4 Rd4 28.Nf3 Rc4 (28...Rf4!? 29.Ne5–+) 29.Ne5 Rc2 30.Rd1 Do you see the mate threat? 30...Nd6 31.Ra1 Threatening mate... how? 31...Kf8 32.Ra8 Ke7 33.Nc6 (33.Rg8 Nf5 34.Ng4–+) 33...Kd7 (better 33...Rc6 34.Rh8 b5 35.Rh7 b4–+) 34.Ne5= Ke7 35.Ra7?? (35.Nc6 Rc6 36.Rh8–+) 35...Nb5 36.Ra8 Rc1 37.Kg2 f6 38.Ng6?? (38.Ng6 hg6 39.Rg8–+; 38.Ng4 Kf7 39.Rh8–+). banistyle (1940) – RichardSommer (1965), lichess.org, 2020.

2.c4?? Nf6 (--> 1.b4 Nf6 2.c4 e6).

2.d3?? Bb4 3.c3 Ba5 4.g4 Qf6 5.Bb2 Bb6 6.Nf3 d5 7.Qd2 c5 8.Qg5 Qg5–+ 9.Ng5 h6 10.Nf3–/+ Nf6 11.Ne5 Nbd7 12.Nd7 Bd7 13.Nd2 Ng4 14.f3 Ne3 15.Bh3 Nc2 16.Kd1 Na1 17.Ba1 e5 18.Bg2 0-0 19.c4 d4 20.Ne4 Ba4 21.Ke1 f5 22.Nd6 Ba5 23.Kf1 Bd2 24.Nb7 Rab8 25.Nd6 Rb1 26.Kf2 Be3 27.Kg3 f4 28.Kg4 Bd7 29.Kh4 Bf2 30.Kh5 Kh7 31.Rb1 g6 0–1. bsjostedt – petre, net–chess.com, 2005.

2.d3?? b6 3.c3= Bb7 4.e4 Nf6 5.Nf3 Be7 6.g3 (6.Be2 0-0=) 6...d6 7.Ba3 0-0 8.Bg2 Nc6 9.0-0 Ng4 10.b5 Nce5 11.Ne5 Ne5 12.c4 (12.f4 Nd7=) 12...a6 (12...Bf6 13.Nc3–/+) 13.ba6 Ra6 14.Bb2 Bf6 15.Nc3 c6 16.f4 Ng6 17.Rf2? (better is 17.d4=) 17...Bd4–+ 18.Qf3 Bf2 19.Qf2 Ne7 20.Rf1 c5 21.a3 Qc7 22.Nb5 Qd7 23.Qf3 Nf5 (23...d5!?–+) 24.Qg4–/+ g6?? (better is 24...Nd4 25.Nd4 cd4 26.Bd4 f5–/+) 25.ef5+– ef5 (25...Bg2 26.fg6 fg6 27.Kg2+–) 26.Qg5 (better is 26.Qh4!? f6 27.Bb7 (27.Bf6?! Bg2 28.Kg2 d5+/–) 27...Qb7 28.Nc3+– (28.Nd6?! Qe7 29.Nb5 Qe3 30.Rf2 Qd3+/–)) 26...Bg2?? (better is 26...f6 27.Bf6 Bg2 28.Kg2 d5+/–) 27.Qf6 (27.Qf6 Bf1 28.Qg7; 27.Kg2?! f6 28.Bf6 d5+/–) 1–0. Sundfar – Nicola, playchess.de, 2004.

2.d3?? d5 3.Bb2 Bb4–/+ 4.Nd2 Nf6 5.g4 Ng4 6.Bg7 Rg8 7.Bd4 Qh4?? 8.Nh3?? e5 9.Be3 Ne3 (9...Ne3 10.Qb1 Nf1 11.Rf1 Bh3–+) 0–1. xtom (1635) – regan29 (1780), kurnik, 2011.

2.d3?? Nf6 3.c3+= Be7 (3...d5 4.Nf3+=) 4.Nf3 (4.e4 0-0=) 4...c6 (4...d5 5.Bf4+=) 5.Bg5 d5 6.Nd4 (6.Nbd2 a5 7.a3 Nbd7=) 6...Qc7 7.Qa4 Bd7 8.Qa5 (8.e3!?+=) 8...Qa5–/+ 9.ba5 c5 10.Nf3 Nc6 11.e4 (11.a6!?–/+) 11...de4–+ (11...Na5?! 12.e5 Ng8 13.Be3+=) 12.de4 Ne4 13.Be7 Ke7 14.a6 b6 15.Bd3 Nf6 16.Na3 Rhd8 (16...e5 17.Bb5–+) 17.Ng5 (17.0-0-0–+) 17...Ne5 18.Bb5 (18.Bh7 g6 19.Rd1 Ba4 20.Rd8 Rd8–+ (20...Kd8?! 21.f4 Nd3 22.Kd2–/+)) 18...h6 19.Nf3 Bb5 (19...Nf3 20.gf3 Nd5 21.c4–+) 20.Nb5 (20.Ne5 Ba4–+) 20...Nd3 21.Ke2–+. Pyles,Jeff – Purser,T, WR GA BBS, 1991.

2.d4?? a6 3.e4 (3.a3 Nf6=) 3...Bb4+= 4.c3 Be7 5.Nf3 b5 (5...d5 6.e5+=) 6.Nbd2 c5 (6...Nf6 7.Bd3+=) 7.a4 cd4 8.Nd4 ba4 9.Ra4 (9.Qa4 Bb7+=) 9...Bb7 10.Nc4 (better is 10.Qg4!? g6 11.Qg3+=) 10...Be4–/+ 11.Ra5 (11.Bf4 Nf6–/+) 11...d5 (better is 11...Nf6–+) 12.Ne5?? (better is 12.Qa4 Qd7 13.Qd7 Nd7 14.Nd2–+) 12...Qa5 13.Ne2 (13.Bd2 Qc7 14.Qa4 Kf8–+) 13...Nf6 (13...Bf6 14.Bf4–+) 14.f3 Bg6 15.Bg5 (15.Bf4 0-0–+) 15...0-0 16.Nf4 (16.Ng6 fg6 17.Qc1–+) 16...Qc3 17.Kf2 Ne4! 18.fe4 Bc5 19.Ke2 Qe3 0–1. Harrison,Mark – Johnson,Paul, IECC, 1999.

2.d4?? d5 3.c3 (--> 2.c3 d5 3.d4).

2.d4?? Nf6 (--> 1.b4 Nf6 2.d4 e6).

2.e3?? Na6 3.Ba3 (3.a3 Nb8=) 3...Bb4 (3...Nb4 4.c3 Nc6 5.Bf8 Kf8 6.d4+=) 4.Bb2 (4.Ba6!? Ba3 5.Na3 ba6 6.Rb1=) 4...Nf6–/+ 5.c3 Ba5 6.Nf3 c5 7.g3 (7.Ba6!? ba6 8.c4–/+) 7...0-0 8.Ba6 ba6 9.Ng5 (9.Na3 Rb8 10.Rb1 Bb7–+) 9...Bb7 10.c4?? (10.0-0 Rb8–+) 10...d5 (better is 10...Bh1 11.Qc2 Re8 12.Bc3–+) 11.cd5?? (better is 11.Qf3–+) 11...Qd5 (11...Bd5?! 12.Qc2 e5 13.f3–/+; 11...Nd5?! 12.Nf3–+; 11...ed5?! 12.Qf3–+) 12.Nc3 (12.Qf3 Qf3 13.Nf3 Bf3 14.Rg1–+) 12...Qh1 13.Ke2 Qh2 14.Qh1 (14.Nf3 Qh5 15.Qh1–+) 14...Qh1 (better is 14...Bh1 15.Nf3 Bf3 16.Kf3–+) 15.Rh1 Rfe8 (better is 15...Bh1 16.Na4–+) 16.Nce4 (16.f3 e5–+) 16...Rad8 (better is 16...Ne4 17.Rh7 e5 18.Ne4 Kh7 19.Nc5 Bd5–+) 17.Bf6 gf6 18.Nf6 (18.Nh7 Be4 19.Nf6 Kg7 20.Ne4 f5–+) 18...Kf8 19.Ngh7 (19.Rd1 Re7–+) 19...Ke7 20.Rh6 (20.Rd1 Rh8 21.e4–+) 20...Rd2 21.Ke1 Red8 (21...Bf3 22.Nd5 Rd5 23.Kf1 Rd1) 22.a3 (22.e4–+) 22...Rd1 23.Ke2 R8d2 0–1. Elsner,David (1680) – D,Maik (1730), remoteschach.de, 2003. (=1.e3 e6 2.b4 Na6)

2.e3?? b6 3.Nf3 (3.Bb2 Bb7= (3...Bb4?? 4.Bg7 Ba6 5.Nf3+–)) 3...g6 (better is 3...Bb4!? 4.Bb2 Nf6–/+) 4.Bb2 Nf6 5.b5 (5.a3 Bb7+=) 5...Bg7 6.c4 0-0 7.Be2 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 c6 11.Nc3 Bb7 12.0-0 d5 13.h3 (13.cd5 cd5 14.Bb2 Ne4+=) 13...dc4= 14.Bc4 cb5 15.Nb5 Ba6 16.Qb3 (16.Qe2 Nc6+=) 16...Ne4 (16...Bb7!?=) 17.Bg7+= Kg7 18.d3 Nc5 19.Qb2 Kg8 20.Ne5 f6 21.Ng4 Nd3 22.Be6 Kg7 23.Qb3?? (better is 23.Qb1+=) 23...Nc5–+ 24.Qb2 Ne6 0–1. GuestKRVB – GuestQLWY, freechess.org, 2017.

2.e3?? d5 3.a3 Nf6 4.Bb2 Nbd7 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3).

2.e3?? Be7 3.Bb2 Bf6 4.Bf6 Qf6 5.Nc3 b6 6.Nf3 Bb7 7.Be2 Nc6 8.b5 Ne5 9.Ne5 Qe5 10.0-0 Nf6 11.Bf3 Bf3 12.Qf3 0-0 13.d4 Qh5 14.Ne4 (14.Qh5 Nh5 15.g4 Nf6=) 14...Qf3= 15.Nf6?? (better 15.gf3 Ne4 16.fe4=) 15…Qf6–+ (15...Qf6 16.c4 a6–+) 0–1. aravind555 – johnalok, lichess.org, 2019.

2.e3?? Qf6 3.d4 Bb4 4.Nd2 Bc3 5.Rb1=+ Nh6 6.Ne2 0-0?? 7.Nc3+– d5 8.Rb7?? Bb7–/+ 9.Bd3 Nc6 10.0-0 a6 11.Ne2 Nb4 12.a3 Na2 13.Bb2= c5 14.Qa1 c4 15.Bh7 Kh7–/+ 16.Qa2 Ng4 17.Ng3 Rac8 18.c3 e5 19.Qb1 e4–/+ 20.h3 Nh6 21.Nh5 Qg5 22.Nf4 Bc6 23.Nf3 Qe7 24.Ne5 Ba4?? 25.Nd5+– Qg5? 26.Qe4 g6? 27.Nf3 Qd8 28.Ne7 Rb8 29.Ng5 Kg7 30.Nf3 Rb2–+ 31.d5 Re8 32.Qd4 Kh7?? 33.Ng5# 1–0. gtate (1800) – maf, net–chess.com, 2002.

2.e3?? Nf6 3.b5 a6 4.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.e3).

2.e4?? a5 3.b5= d6 4.Nc3 Bd7 (4...d5 5.Nf3=) 5.Nf3+= c6 6.a4 c5 (6...Nf6 7.Be2+=) 7.Be2 Nf6 8.0-0 d5 9.d4 (9.e5 Ne4+/–) 9...c4 (better is 9...de4!? 10.Ne5 Be7=) 10.e5+/– Ng4 11.h3 Bb4 (better is 11...Nh6!?+/–) 12.Na2+– (12.hg4?! Bc3 13.Rb1 Qe7+=) 12...Qh4?? (better is 12...Nh6 13.Nb4 ab4 14.Bh6 gh6+–) 13.Nh4 g5 14.Nb4 ab4 15.Bg5 h6 16.Bf4 h5 17.hg4 hg4 18.g3 Bc8 0–1. Voveris,Saulius (1800) – Quanter,Kirsty, FICGS, 2010. (=1.e4 e6 2.b4 a5)

2.e4?? a6 3.c3 Nc6 (3...d5 4.e5=) 4.d4+= d6 5.Nf3 e5 6.Qb3 (6.b5 ab5 7.Bb5 Bd7+=) 6...Nf6 (6...ed4 7.cd4 d5 8.b5+=) 7.Bc4 ed4 (better is 7...Qd7!?=) 8.Bf7+/– (8.cd4?! d5 (8...Ne4?? 9.Bf7 Ke7 10.Bd5+–) 9.ed5 Nb4= (9...Bb4? 10.Kf1 Ne7 11.Qb4+–)) 8...Ke7 9.cd4 Ne4?? (better is 9...Nb4 10.Bc4 d5 11.Qb4 Ke8 12.Qa4 Bd7+/–) 10.0-0+– g6 (10...Qd7 11.Bd5 Qf5 12.Be4 Nd4 13.Nd4 Qe4 14.Bg5 Kd7 15.Nd2 Qd4 16.Qf7 Kc6 17.Rac1 Kb6 18.Be3 Qe3 19.Qc7 Ka7 20.fe3+–) 11.Nc3 Nc3 (11...Kf6+–) 12.Bg5 (12.Bg5 Kd7 13.Qe6) 1–0. Riha,Josef (2040) – Kehayov,Yulian, FICGS, 2010. (=1.e4 e6 2.b4 a6)

2.e4?? c5 3.b5 d5 4.ed5 ed5 5.Nf3 Bd6 6.Bb2 Nf6 7.Be2 0-0 8.Nc3 Bf5 9.0-0 Qc7 10.h3 Nbd7 11.Re1 Rae8 12.d3 d4 13.Nb1 Re7 14.Nbd2 Rfe8 15.Nc4 Bf4 16.Bc1 Nd5 17.Bf4 Qf4–+ 18.Bf1 Re1 19.Ne1 Nc3 20.Qd2 Qd2–+ 21.Nd2 Nb6 22.g4 Bd7 23.Nb3 Nba4 24.Na5 b6–+ 25.Nc6 Nb5 26.Bg2 Nac3 27.Kf1 Re6 28.Nd8 Re2 29.a4 Nd6 30.Nc6 a5 31.Bf3 Re6 32.Nd8 Rh6 33.Kg2 Ba4 34.Nc6 f5 35.Ne7 Kf8 36.Nf5 Nf5 37.gf5 Rf6 38.Be4 Bd7 39.Nf3 Bf5 40.Bf5 Rf5 41.Nd2 Ke7 42.Nc4 b5 43.Re1 Kd8 44.Na5 ½–½. Zimmermann,J – Schultz,N, Eintracht, 2002.

2.e4?? c6 (--> 1.b4 c6 2.e4 e6).

2.e4?? Nc6 3.a3 d5 4.ed5 ed5 5.Bb2 a6 6.d4 b5 7.Nf3 Qe7 8.Be2+= Bf5 9.Nbd2 Nf6 10.h3 Be4 11.h4 Bf3=+ 12.Nf3 Ne4 13.0-0 Rb8 14.Re1 Qf6 15.g3 h6 16.Qd3 a5 17.c3 g5 18.Kg2?? g4–+ 19.Qe3 gf3 20.Bf3 ab4 21.cb4 Qe7 22.Be4= Rd8?? 23.Bd3+– Qe3 24.Re3 Be7 25.Bb5 Kd7 26.Bc6 Kd6 27.b5 f5 28.f4 Bf6 29.a4 Rhg8 30.Rae1 Rde8 31.Be8 c6 32.Bc6 Bh4 33.Re6 Kc7 34.R1e3 Bd8 35.Bd5 h5 36.Rc6 Kd7 37.Bg8 (37.Bg8 h4 38.Be6 Ke8 39.Bf5 Kf7 40.Bg6 Kg7 41.d5 Bf6 42.Rf6 h3 43.Kh3+–) 1–0. halo2 – MC Q, ChessWorld.net, 2005.

2.e4?? d6 3.Nc3 e5 4.Nd5 Qg5?? 5.d3 Qg6?? 6.g3 Nc6?? 7.Nc7+– Kd8 8.Na8 Nd4 9.Be3 Be7 10.f4 Nb5 11.fe5 de5 12.d4 ed4 13.Bd4 Nh6 14.Bg7 Qd6 15.Qh5 Qb4 16.Kf2 Qd2 17.Be2 Bc5 18.Kg2 f5 19.Bh8 Ng8 20.Qf7 Bd4 21.Qg8 Kd7 22.Qd5 Nd6 23.Bd4 fe4 24.Rd1 Qc2 25.Be3 Ke7 26.Qd6 Kf7 27.Rc1 Qa2 28.Rc7 Bd7 29.Rd7 Kg8 30.Qb8 1–0. JimDog – Doobi, ChessWorld.net, 2005.

2.e4?? e5 3.d3 Bb4–/+ 4.Bd2 Bc5 5.Nf3 d6 6.Be2 h6 7.0-0 Qf6 8.h3 Nc6 9.c4 Qg6 10.Nh4 Qf6 11.Nf3 g5 12.Nc3 Be6 13.Nb5 Kd7 14.Be3 a6 15.Bc5 dc5 16.Nc3 Nge7 17.a3 h5 18.Qd2 g4–+ 19.Qg5 Qg5 20.Ng5 gh3 21.Nh3 Bh3 22.gh3 Nd4 23.f4 Nc2 24.Ra2=+ Nd4 25.fe5 Rhg8 26.Kh1 h4 27.Rg1?? Rg1–/+ 28.Kg1 (28…Rg8 29.Bg4 Ke8 30.Na4–/+). BIGAL 1971 – vulpo, ChessWorld.net, 2005.

2.e4?? Qf6 3.g4?? Qa1–+ 4.b5 Qb1 5.f3 b6 6.h4 Qa2 0–1. billybob – maf, net–chess.com, 2001.

2.e4?? Nf6 3.Nc3 Bb4 4.f3 d6 5.Bb2 0-0 6.a3 Bc3 7.Bc3 a6 8.Bd3 Nbd7 9.f4 b5 10.e5 Nd5–+ 11.Qh5 g6 12.Qh6 Nc3–+ (12...Nc3 13.Nf3 Nd5–+) 0–1. Kitvis – ana_goldberg, internet, 2005.

2.e4?? g6 3.Bb2 Nf6 (--> 1.b4 Nf6 2.Bb2 g6 3.e4 e6).

2.Nf3?? b6 3.Bb2 Nf6 4.b5 Bb7 5.e3 Be7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7).

2.Nf3?? d5 3.a3 Nf6 (--> 2.a3 Nf6 3.Nf3 d5).

2.Nf3?? Qf6 3.Bb2?? Qe7 (better is 3...Qb2 4.Nc3 Qb4–+ (4...Bb4?! 5.Rb1 Bc3 6.Rb2 Bb2 7.c3–+)) 4.b5 c6 (4...Qb4 5.Ba3 Qb5 6.Nc3=) 5.a4 c5 (5...Nf6 6.e3=) 6.d4 c4 7.e4 Nf6 (better is 7...d5!?+=) 8.e5+– Qb4? (better is 8...Ne4 9.Ba3 Qd8 10.Bf8 Rf8 11.Bc4 d5+–) 9.Qd2?? (better is 9.Bc3 Qe7 10.ef6 Qf6 11.Bc4+–) 9...Qb2–+ 10.Ra3 (10.ef6 Qa1 11.Qc1 d5 12.fg7 Bg7–+) 10...Ba3 (10...Qb1 11.Qd1 Qd1 12.Kd1–+) 11.Qd1 (11.Na3 Ne4 12.Qe3 Qa1 13.Ke2 Nc3 14.Kd2–+) 11...Bb4 12.c3 Bc3 (better is 12...Ne4!? 13.Be2 Bc3 14.Nc3 Nc3 15.Qd2 Qb1 16.Bd1 Na4 17.0-0 Qb5 18.Bc2–+) 13.Nc3 Qc3 14.Qd2 Ne4 (14...Qa1 15.Qd1 Qd1 16.Kd1–+) 15.Qc3 Nc3 16.Bc4 d5 17.Bb3 (17.ed6 Na4 18.Bd3 f6–+) 17...0-0 (17...a6 18.b6 Bd7 19.Kd2 Na4 20.Ba4 Ba4 21.Rc1–+) 18.Ng5 (18.Kd2 Ne4 19.Ke3 b6–+) 18...a6 (18...f6!? 19.Kd2 Nb5 20.ab5 fg5 21.Ke3–+) 19.Kd2 Ne4 20.Ne4 de4 0–1. Orchidee – Decorator, playchess.de, 2005. (=1.Nf3 e6 2.b4)

2.f4?? b6 3.Nf3 Ne7 4.g3 b5 5.Bg2 f6 6.a4 c5 7.Nc3 d5 8.Ne4?? de4 –+. Volokitin,Andrei (2680) – Meinhardt,Maximilian (2375), Mainz FiNet op 6th, 2007.

2.f4?? Qf6 3.Nc3 Qf4 4.b5 Bb4 5.Rb1 c5 6.a3 Bc3 7.dc3 Qf6 8.Qd3 b6 9.Nf3 d5 10.c4 dc4?? 11.Qe4+– Ne7 12.Qa8 (12…Nd7 13.Qa7+–) 1–0. marre – oppo1, internet, 2010.

2.g3?? Bb4 3.Bg2 Nf6 4.Bb2 0-0 5.a3 Be7 6.d4 c6 7.Nd2 Qb6 8.e3?? (better is 8.Rb1–/+) 8...Qb2–+ 9.Rb1 Qc3 10.Ne2 Qa5 11.0-0 d5 (< 11...Ba3 12.Nc4 Qa6 13.Qd3–+) 12.Nf3 Nbd7 13.Ne5 Ne5 14.de5 Nd7 15.f4 Bc5 16.Qd3 Qa3 (16...Ba3?! 17.Ra1–+) 17.Qd2 (17.Rb3 Qa4 18.Nd4–+) 17...Be3 18.Qe3 Qe3 (19.Rf2 Nc5–+) 0–1. audrey – Simson9, Caissa.com, 2004.

2.g4?? Qf6 3.Bb2?? Qb2–+ 4.Nc3 Qb4 5.Rb1 Qg4 6.d4 g6 7.Bh3 Qg5 8.Nf3 Qd8 9.0-0 Bg7 10.e4 Nh6 11.e5 0-0 12.d5 ed5 13.Nd5 d6 14.Bc8=+ a6 15.Bb7 Ra7 16.c4 c6 17.Nf4 de5 18.Qd8 Rd8 19.Ne2 e4 20.Ne5?? Be5 21.f3 e3 22.Rb3 Nd7 23.Bc6 Nc5 24.Re3 Re7 25.f4 Bd6 26.Re7 Be7 27.h3 a5 28.Ng3 Bh4 29.Kg2 Rd2 30.Rf2 Rd1 31.Bf3 Rd4 32.Rd2 Rd2 33.Ne2 Ra2 34.Kf1 Nf5 35.Nc3 Nd3 36.Na2 a4 37.Be2 Nf4 38.Bf3 Ne3 39.Kg1 h5 40.c5 Ne6 41.c6 g5 42.Nb4 g4 43.Bd5 Nc7 44.Be4 gh3 45.Kh2 Be7 46.Na2 Ng4 47.Kg3 h2 48.Nc3 a3 49.Kg2 h1Q! 50.Kh1 Nf2 51.Kg2 Ne4 52.Ne4 a2 53.Kg3 a1Q 54.Kf4 Qc1 55.Kf5 Qc6 56.Kf4 Ne6 57.Ke3 Bc5 58.Kd3 Qd5 59.Kc3 Qe4 60.Kb3 h4 61.Kc3 Qd4 62.Kb3 Qb4 63.Kc2 h3 (63...h3 64.Kd1 Qb3 65.Kd2 h2 66.Ke2 h1Q 67.Kd2 Qhd1) 0–1. xzara – crazy 8, ChessWorld.net, 2005.

2.Nh3?? Qf6 3.c3=+ Bb4 4.a3 Ba5–/+ 5.e3 Nc6 6.Bb5 e5 7.a4 d5–+ 8.f4 Bh3 9.gh3 Qh4 10.Ke2 Qh3 11.fe5 Qg2 12.Kd3 Qe4 13.Ke2 0-0-0 14.d3?? d4 15.de4+– dc3 16.Kf2 Rd1+= 17.Rd1 c2 18.Rd5 Nge7 19.Rc5 Nb4?? 20.Nd2 h5? 21.Nc4?? Nd3+= 22.Kg3?? Nc5 23.Na5=+ g5 24.h4 Ne4 25.Kh3? Nf2?? 26.Kg3= Nh1?? 27.Kh3?? Nf5 28.hg5 Nf2 29.Kg2 h4?? 30.e6 fe6? 31.Kf2+– h3 32.Bd2 h2 33.Kg2 a6?? 34.Bc3 h1Q!–+ 35.Kf2 Qh2 36.Kf3 Qg3 37.Ke4 Qe3# 0–1. Elsner,David (1680) – Rasch,Harald (2095), remoteschach.de, 2005.

2.h4?? Bb4 3.c3 Ba5 4.a3 Nf6 5.Qa4 b6 6.d3 0-0 7.Bg5 Bb7 8.Nh3 d5 9.Bf6 Qf6 10.Qb3 Qh4 11.Ra2 d4 12.Qb5 dc3 13.Kd1 Bd5 14.Nc3 Bc3 15.Rc2 a6 16.Qb1 Qa4 17.Kc1 Qa3 18.Kd1 Nc6 19.Qc1 Qa4 20.Ng5 Bb3 21.Qe3 Bc2 22.Kc1 Nb4 23.Qb6 Qa3 (23...Qa1) 0–1. Chad's Chess 0.15 – Terra 2.5.1, WBEC2_4thDivision, 2001.

3.Bb2 Kd6 4.e3 Kd5?? (4...Ke7!?+-) 5.c4 (better 5.Qh5 f5 6.Nf3+-) 5...Kd6 6.d4 Ke7 7.c5 (7.Nf3 Nf6+-) 7...Kf6 (7...Nf6 8.Nc3+-) 8.f4 (8.Bc4 d5 9.cd6 cd6 10.d5 e5+-) 8...Ke7 (better 8...a5 9.b5 d5 10.cd6 cd6+-) 9.g4?? (9.Nf3 Nf6+-) 9...Kf6? (better 9...a5!?+=) 10.g5 (10.d5!? Ke7+-) 10...Ke7 11.Bd3 Ke8 12.Nc3 Ke7 (better 12...h6 13.Qh5 d5 14.cd6 cd6+-) 13.Nf3 Ke8 14.Ne4 (14.d5 a5 15.Nb5 ed5+-) 14...Ke7? (14...Ne7+-) 15.Ke2 (better 15.Bc4!? b5 16.Bb3 Ke8+-) 15...Ke8 16.h4 (better 16.b5+-) 16...Ke7? (better 16...Ne7+-) 17.h5 (better 17.Qb3 Ke8 18.d5 ed5 19.Qd5 Ne7+-) 17...Ke8 (17...h6 18.Qb3 Ke8 19.d5+-) 18.h6! d5 (18...gh6 19.d5 Combination) 19.Ng3 (better 19.cd6 f5 20.Ng3 Qd6 21.d5+-) 19...gh6 20.gh6 (20.Nh5 a5+-) 20...Nh6+/- 21.Ne5 (21.Qa4 Bd7 22.Qc2 a6+/-) 21...Nc6 (21...Rg8 22.Qg1+/-) 22.Nc6 (22.Qa4!?+/-) 22...bc6 23.Qg1 (23.Qa4!?+/-) 23...a5= 24.Ne4?? (better 24.Bc3 ab4 25.ab4 Ra1 26.Qa1=) 24...de4-+ 25.Be4 Bd7 26.d5? (26.Qh2 Rg8 27.Bh7 Rg4-+) 26...cd5 (26...Rg8 27.Qf2 cd5 28.Bh7-+) 27.Bh8 de4 28.Bc3 (28.Rd1 Qe7 29.Bg7-+) 28...Bb5 29.Kf2 Qd3 30.Qe1 Ng4 31.Kg3 (31.Kg1-+) 31...Ne3 32.Rh3 Nc2 33.Kh4 Ne1 (33...Ne1 34.Rd3 Nd3 35.ba5 Be7 36.Kg3 Kd7-+; 33...Be7 34.Bf6 Bf6 35.Kg4 h5 36.Kh5 Qh3 37.Qh4 Qh4) 0-1. bulletproof_monkey - Lance5500 (2565), lichess.org, 2020. (=1.a3 e6 2.b4 Ke7)

3.Bb2 Kd6 4.Nf3 b6 5.e4 Kc6?? (5...a5 6.Bc4+/-) 6.d4 (better 6.Ne5 Kb7 7.Nf7+-) 6...Kb7+/- 7.a4 (7.Bd3 d5+/-) 7...a5? (7...Bb4 8.Bc3 Bc3 9.Nc3=) 8.b5 (8.ba5!? Bb4 9.Nbd2 Ba5 10.Bd3+/-) 8...Ka7 9.Bd3 Kb7 (9...Bb7 10.0-0+/-) 10.Qe2 Ka7 11.c4 d6 12.Nc3 Bb7 13.0-0 Nd7 14.Rac1 f6 15.Nd2 Be7 16.Nb3 Qf8 17.c5 (17.Qe3 Re8+/-) 17...dc5+= 18.dc5 (18.Bc4 e5 19.d5 f5+=) 18...Nc5 19.Nc5 Bc5 20.Nb1 (20.e5 fe5 21.Ne4 Bd6=) 20...Rd8= 21.Nd2 e5 22.Nb3 Bd6 23.Qe3 Ne7 (better 23...Nh6=) 24.Na5+- Nc8 25.Nb7 Kb7 26.a5 Bc5 (26...ba5 27.Rc6+/-) 27.Qe2 (27.a6 Ka7 28.Qe2 Nd6+-) 27...Qd6 (27...ba5 28.Qc2+/-) 28.Bc4 (28.a6!? Ka7 29.Rfd1 Qe7+-) 28...Qd2+/- 29.Qd2 Rd2 30.Bd5 Kb8 31.Bc3 Rd3 32.Rfd1 Rd1 33.Rd1 Rd8 34.Ra1 (34.a6 Rd6+/-) 34...ba5 35.Ra5 (35.Ba5 Ne7 36.Rc1 Bb6 37.Bb6 cb6=) 35...Na7?? (better 35...Nb6 36.h3 Nd5 37.ed5 Rd5-+) 36.Ra6 Bb6 37.Ba5 (37.g4!?+=) 37...Ba5= 38.Ra5 Rd6 39.f3 Rb6 Attacking the isolated pawn on b5 40.h4 (better 40.Bc4!?=) 40...Rb5-/+ 41.Ra6 Rb6 42.Ra5 c6 43.Be6 Nb5 44.Bf5 (44.Bg8-/+) 44...Kc7 (better 44...g6!? 45.Be6 Nd4-+) 45.Bh7=+ Nd4 46.Bf5 Nf5 47.ef5 Rb4 48.Ra7 Rb7 49.Rb7 Kb7 50.Kf2 (50.g4 Kc7+=) 50...c5 (50...Kc8!?=) 51.Ke3 Kc6 52.Kd3 (52.g4!?+/-) 52...Kd5= 53.Kc3?? (53.g4 c4 54.Ke3=+) 53...c4 (53...e4 54.fe4 Ke4 55.Kc4 Kf5 56.Kc5-+) 54.g4 (54.Kd2 e4 55.fe4 Ke4 56.Kc3 Kf5 57.Kc4-+) 54...Kc5?? (better 54...e4 55.fe4 Ke4 56.Kc4 Kf4-+) 55.g5+- Kd5 (55...Kd6 56.Kc4 Ke7+-) 56.h5 (better 56.gf6 gf6 57.h5+-) 56...fg5 57.f6! Ke6 (57...gf6 58.h6 Passed pawn) 58.h6 (58.fg7 Kf7 59.h6+-) 58...Kf7 (better 58...gh6 59.f7 Kf7 60.Kc4 Kg6-+) 59.h7+- gf6 60.h8Q Ke6 61.Qh7 g4 62.Qe4 (better 62.Qg8 Kd6+-) 62...gf3 63.Qc4 Kf5 64.Qf1 Kf4 65.Qf3 (better 65.Kd3 f5 66.Qc1 Kg4 67.Ke3+-) 65...Kf3-+ 66.Kd3 e4 67.Kd2 e3 68.Ke1 f5 69.Kf1 f4 70.Ke1 If White now would get Ke4 in, he might survive 70...Ke4 (70...Ke4 71.Ke2 f3 72.Kf1 Kd3 73.Kg1 Ke2 74.Kh2 f2 75.Kg3 Kf1 76.Kf4 e2 77.Ke4 e1Q 78.Kd4 Qd2 79.Kc5 Ke2 80.Kc6 f1Q 81.Kb6 Qd6 82.Ka5 Qe1 83.Kb5 Qeb4) 0-1. black_bishop_88 (2510) - VincentBlom (2510), lichess.org, 2020. (=1.a3 e6 2.b4 Ke7)

3.Bb2 (--> 2.Bb2 Qe7 3.a3).

3.c3 Nc6 4.Bb2 b6 5.e3 Bb7 6.Nf3 0-0-0 7.Be2 Nb8 8.d4 Nh6 9.0-0 g6 10.Bd3 Bg7 11.Nbd2 Rhg8 12.Re1 f5 13.c4 Rdf8 14.c5 bc5 15.bc5 Kd8 (15...g5 16.Nb3+/–) 16.Qc2 Kc8 17.Nc4 (better is 17.Rab1 Bd5 18.Bc3+–) 17...Rd8?? (better is 17...Bf3 18.gf3 Nc6+=) 18.Rab1 (18.Nd6 cd6 19.cd6 Nc6 20.de7 Rde8+–) 18...Rgf8?? (18...Nc6+–) 19.Bc3 (better is 19.Nd6! Qd6 20.cd6+–) 19...d5 20.Bd2 (better is 20.cd6 cd6 21.Bd2+–) 20...dc4–+ 21.Bc4 c6?? (21...Be4 22.Qa4 Nc6–/+ (22...Bb1? 23.Rb1 Rd5 24.Qb5+–)) 22.Rb2 (better is 22.Qb3 Rd5 23.Ng5+– (worse is 23.Bd5 ed5 24.Rb2 Rd8+–)) 22...Ba6?? (better is 22...Rd7+=) 23.Ba6 (23.Reb1 Bb5 24.a4+– (worse is 24.Bb5 cb5 25.Rb5 Nc6+–)) 23...Na6+/– 24.Reb1 Nb8?? 25.Rb8 Kd7 26.R8b7 Ke8 27.Re7 Ke7 28.Rb7 Ke8 29.Qb3 Rf7 30.Rf7 Nf7+– 31.Bc3 Kf8 32.Ne5 Ne5 33.de5 Be5 34.Be5 Rd5 35.f4 Rd8 36.Bd6 Ke8 37.h3 h5 38.Kh2 h4 39.a4 a5 40.Qb5 cb5–+ 41.ab5 a4 42.b6+= a3?? 43.c6+– a2 44.b7 a1Q 45.b8Q Rb8–+ 46.Bb8 Qa8 47.c7 Qb7 48.c8Q Qc8 49.Be5 Qa6 50.Bd4 Qb5 51.Be5 Kf7 52.Bd4 Qd5 53.Be5 Qe4 54.Bd4 g5! 55.Be5 gf4 56.Bf4 Kg6 0–1. Fournier,Frederic (1825) – cepangele (1755), Active Blind, 2007.

3.Bb2 Nbc6 4.e3 a6 5.Nf3 b5 6.Be2 g6?? (better is 6...Bb7+=) 7.Bh8+– e5 (7...Bb7 8.0-0+–) 8.Be5 Ne5 9.Ne5 d6 10.Nf3 Bg7 11.Nc3 a5 (11...Bb7 12.d4+–) 12.ba5 (better is 12.Bb5 c6 13.Bc4 ab4 14.ab4 Ra1 15.Qa1 d5+–) 12...b4 (12...c6 13.Nd4+–) 13.ab4 Bc3 (13...c5 14.bc5 dc5 15.a6+–) 14.dc3 Ba6 15.Ba6 Ra6 16.Qe2 Ra8 17.0-0 Rb8 18.Rfd1 Nc6 19.Qe1 (better is 19.Qc4 Qd7+–) 19...Nb4 (19...Qf6 20.Nd4 Ne5 21.Qe2+–) 20.cb4 c5 21.c3 (better is 21.bc5!? d5+–) 21...cb4 22.cb4 Rb7 23.Rab1 Kf8 24.Rdc1 Re7 25.Rb2 h6 26.Rcb1 Kg8 27.b5 Kh8 28.b6 Rb7 29.a6 Qb8 30.ab7 Qb7 31.Qe2 (better is 31.Qc3!? Kh7+–) 31...Kh7 32.h3 (better is 32.Qc2 Qd5+–) 32...f5 33.Nd4 h5 34.Qf3 Qf3 35.Nf3 g5 (35...Kh8 36.b7 Kg8 37.b8Q Kf7 38.Rb7 Ke6 39.Qg8 Kf6 40.Qf7) 36.b7 Kh6 (36...Kg7 37.b8Q f4 38.Qd6 fe3 39.Rb7 Kg8 40.Qd8) 37.b8Q d5 (37...h4 38.Qd6 Kh5 39.Ne5 g4 40.Qg6) 38.Nd2 (38.Qh8 Kg6 39.Ne5) 38...d4 (38...h4 39.Qf8 Kg6 40.Rb6 Kh5 41.Qe8) 39.ed4 (39.ed4 Kg6 40.Rb6 Kf7 41.Qc7 Ke8 42.Rb8; 39.Qf8 Kh7 40.Qe7 Kg6 41.Rb6) 1–0. Fournier,Frederic (1875) – JR1 (1795), Active Blind, 2007.

3.Bb2 d6 4.e3 Nd7 5.Nf3 e5 6.d4 g6 (6...e4 7.Nfd2 d5 8.c4=) 7.de5+= Bg7 8.ed6 Bb2 9.de7 Qe7 10.Ra2 Bg7 11.Nbd2 (11.c3 0-0+=) 11...0-0 (11...a5 12.b5=) 12.Bd3 Rd8 13.0-0 b6 (13...Ne5 14.Ne5 Be5 15.Qb1=) 14.c4 (14.Be4!? Rb8 15.c4+/-) 14...Bb7+= 15.Qc2 c5 (15...a5 16.b5=) 16.b5 Nf6 17.h3 Rd7 18.Be2 Rad8 19.Nb3 (19.Rd1 Qe6+=) 19...h6 (19...Ne4!? 20.Qc1 Nc3-/+) 20.Rd1 (20.Nbd2 Qe6=) 20...Ne4 21.Rd7 Rd7 22.Qc1 f5 23.Nbd2?? (23.Rc2 Qe6=) 23...Nf6?? (better 23...Nc3 24.Nb1 Na2-+) 24.Nf1 (24.Qc2 f4 25.Qb3 Qe8+=) 24...g5 (24...Ne4 25.Rc2=) 25.Rd2 Ne4 26.Rd7 Qd7 27.Qd1 (27.Qc2 Qe6+=) 27...Qd1= 28.Bd1 Nc3 (28...Bb2 29.a4+=) 29.Bc2+= Be4 (better 29...a6 30.ba6 Ne2 31.Kh2 Ba6+=) 30.N1d2?? (better 30.Be4 Ne4 31.g4+/-) 30...Bc2-+ 31.Ne5 (31.g4-+) 31...Be5 32.f4 (32.g4 fg4 33.hg4 Nb1 34.Nb1 Bb1-+) 32...gf4 33.ef4 (33.Nf3 Bd6 34.ef4 Bf4-+) 33...Bf4 34.Nb3 (34.Nf3-+) 34…Bb3 0-1. kriku81 (2300) - opperwezen (2735), lichess.org, 2017.

3.d4 Ng6 4.e4 Be7 5.Nf3 a6 6.Bd3 f6 7.h4 Bd6 8.h5 Ne7? (better is 8...Nf4 9.Bf1 e5+/–) 9.e5+– fe5 10.de5 Bb4 11.ab4 Nd5 (11...d6+–) 12.Bg5 Ne7 13.h6 g6 (13...d5 14.hg7 Rg8 15.Bf6+–) 14.Bg6! hg6 (14...Ng6 15.Bd8) 15.Bf6 Rh7 16.Ng5 c5 (16...d5+–) 17.Nh7 Nbc6 18.Ng5 Nd4 19.h7 d5 20.ed6 Qd6 21.h8Q Kd7 22.Nf7 Qf4 23.Qd8 Kc6 24.Ne5 Kb5 (24...Qe5 25.Be5 Nc2 26.Qc2 b6 27.Qc7 Kb5 28.Q7c5 bc5 29.Qc5) 25.Qa5 1–0. orane (2210) – TARKUS, Caissa.com, 2004.

3.d4 Ng6 4.Nf3 Be7 5.Nc3 0-0 6.e4 c6 (better is 6...d5!?=) 7.h4+/– d6 (7...Nh4?? 8.Nh4 a5 9.Qh5+–) 8.h5 Nh8 (8...Nh4 9.Nh4 Bh4 10.h6+/–) 9.Bd3 h6 10.Rh3 e5 (10...f6+–) 11.Rg3 Bf6 (11...ed4 12.Ne2 (12.Nd4?! Bh4=) 12...Bh4 13.Nh4 Qh4 14.Nd4+–) 12.Bh6 Kh7 (12...ed4 13.e5! de5 14.Ne4+–) 13.Bg5 Bg5 14.Ng5 (14.Rg5?! Nd7 15.Qd2 f6+–) 14...Kg8 15.h6! g6 (15...gh6 16.Ne6 Double attack) 16.Bc4 b5 17.Nb5! cb5 (17...Ba6 18.h7 Kg7 19.Bf7+–) 18.Bd5 Nc6 19.Bc6 Rb8 20.a4 a6 (20...ba4 21.Ra4 Bb7 22.d5+–) 21.ab5 ab5 22.Qf3 Be6 (22...Rb6 23.Bd5 Ra6 24.Ra6 Ba6 25.Bf7 Rf7 26.Nf7 Qf8 27.Nh8 Qf3 28.Rg6 Kh8 29.gf3 ed4 30.Rd6 Bb7+–) 23.Ra7 ed4 24.h7 Kg7 25.Ne6 1–0. capablancaven (2050) – legzyt, gameknot.com, 2012.

3.Nf3 Ng6 4.Bb2 d6 5.e4 e5 (5...Nd7 6.h4=) 6.Nc3 Be7 7.Bc4 0-0 8.0-0 c6 9.g3 (9.d4 a5=) 9...Nd7 10.Qe2 Nf6 11.d4 Bh3 12.Rfd1 Qc8 13.Qd2 Bg4 14.Be2 b5 15.Qd3 Rd8 16.Rac1 (16.Qe3 a5=) 16...Bf3 (16...ed4 17.Nd4 Ne5 18.Qe3=) 17.Qf3= a5 (better is 17...ed4!? 18.Rd4 a5=) 18.d5+/– ab4 19.ab4 cd5 20.ed5 Qb7 (20...Ne8 21.h4+/–) 21.Nb5 Rac8 (21...Ne8 22.c4+–) 22.c4+– e4 (22...Rb8 23.Ra1+–) 23.Qe3 White prepares c5 23...Qd7 24.c5 (24.Bf6 Bf6 25.Qe4 Rb8+–) 24...dc5 25.d6 Bf8 (25...cb4 26.de7 Qe7 27.Rc8 Rc8 28.Bf6 Qf6+–) 26.bc5 Qf5 (26...Qe6 27.Bf6 Qf6 28.Qe4+–) 27.c6 Rc6 (27...Ng4 28.Qc5 N4e5+–) 28.Rc6 Nd5 (28...Ne5 29.Be5 Qe5 30.f3+–) 29.Qc5 Ne5 (29...Nde7 30.de7 Qc5 31.ed8Q (31.ed8B?! Qc6 32.Bg5 h6+–; 31.ef8R?! Qf8 32.Nd6 h6+–) 31...Qc6 32.Ba3+–) 30.Qd5 Nf3 31.Bf3 Qd5 32.Rd5 ef3 33.d7 f6 34.Nd4 Kf7 35.Ne6 Be7 36.Nd8 Bd8 (36...Kg6 37.Ne6 Bd8 38.Rg5 fg5 39.Nd8 Kh5 40.Ne6 h6 41.Ng7 Kg4 42.d8Q Kh3 43.Rh6 Kg4 44.h3) 37.Rc8 (37.Rc8 g5 38.Rd8 Kg7 39.Rg8 Kg8 40.d8Q Kf7 41.Qf6 Ke8 42.Rd8) 1–0. ygfr – doug, internet, 2009.

3.b5 Ba3 4.Na3 c6 5.e4 Nf6 6.e5+= Nd5 7.c4 Nb6 8.Nf3 0-0 9.d4 cb5 10.Nb5+/– d5 11.ed6+– Na6 12.c5 Nd5 13.Bc4 Bd7 14.Ne5 Bb5 15.Bb5 Nab4 16.Qd2+– f6 17.Nc4 Rb8 18.0-0 b6 19.c6 Rc8 20.Qe2 e5 21.Qf3 ed4 22.a3 (22.a3 f5 23.ab4 Nb4 24.c7 Rc7 25.dc7 Qc7 26.Rae1+–) 1–0. jnunes (1840) – Istvanny, internet, 2007.

3.c3 ab4 4.cb4?? (4.Bb4 Bb4 5.cb4 Nf6+=) 4...b5?? (better is 4...Qf6 5.Nc3 Ra3–+) 5.e3 (5.Bb2 Nf6+= (5...Bb4 6.Bg7 Nf6 7.Bh8+–)) 5...c6 (better is 5...Qf6 6.Nc3 Ra3 7.Nb5 Ra4–/+) 6.g4?? (6.Bb2 Nf6+= (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–)) 6...Bd6?? 7.h3?? h5?? 8.f4?? hg4 9.Qg4? Qh4?? 10.Qh4= Rh4 11.Nf3 Rh6 12.Bg2 Nf6 13.Ne5 Nh5 14.Kf2 Na6 15.Nc3 Nf6?? 16.Rab1?? Be5 17.fe5 Nd5 18.Nd5 cd5 19.d4 Bb7 20.h4 Rc8 21.Kg3 Rc3 22.Bc1 Rc2 23.a3?? Rg6–+ 24.Kh3 Rgg2 25.Rb2 Rb2 26.Bb2 Rb2 27.Rh2 Rb3 28.Rg2 Re3 29.Rg3 Rg3 30.Kg3 Nc7 31.Kg4 Ke7 32.h5 Ne8 33.Kg5 g6! 34.h6 f6 35.Kg6+/– fe5 36.h7 ed4 37.h8Q e5?? 38.Qe5+– Kd8 39.Qb8 Bc8 40.Qb5 Nc7 41.Qb8 d3 42.Qb6 Ba6 43.Qe3 Kc8 44.a4 Kb8 45.b5 Nb5 46.ab5 Bb5 47.Qb6 Ka8 1–0. isaac777 – maddoxdb, gameknot.com, 2012.

3.c3 Qf6 (3...ab4 4.Bb4 (4.cb4? Qf6 5.Nc3 Ra3–+) 4...Bb4 5.cb4+=) 4.Qa4= b6 5.ba5 Ra5 6.Qb3 Nc6 (6...Ne7 7.e4+=) 7.Bf8= Kf8 8.d4 Ba6 9.Nd2 Nge7 10.a4 (10.Ngf3 d5=) 10...b5 (10...e5!? 11.Qc2 ed4–+) 11.e3 ba4 (11...Nd5 12.c4 bc4 13.Nc4 Bc4 14.Bc4=) 12.Ra4 Ra4 13.Qa4 Bc8 (13...Bf1 14.Qa8 Nc8 15.Nf1+=) 14.Ba6 (14.Ngf3 Qg6+=) 14...Ba6 15.Qa6 g6 16.Ne4 Qh4 17.Nc5 d6 18.Nf3?? (better is 18.Nd3=) 18...Qg4–+ 19.Nd7 Kg7 20.0-0 Rd8 21.Nde5 Ne5?? (better is 21...de5 22.Qb7 e4–+) 22.de5= de5 23.Ne5 Qf5 24.f4 Nd5 25.Qc6 Rd6?? 26.Qc5+= f6 27.Nf3 Qd3–/+ 28.Re1 Qc3 29.Qa7 Rd7 30.Kf2 Qc2 31.Re2 Qc3 32.Rd2 Nb6 33.Rd7 Kh6?? 34.Rc7+– Qb2 35.Kg3 g5 36.Rh7 Kg6 37.Qg7 Kf5+– 38.Nd4 Ke4 39.fg5 Ke3 40.Qf6 Qd2 41.Ne6 Qd6 42.Qf4 Qf4 43.Nf4 Nc4 44.g6 1–0. jcekota (2100) – chessleon (2040), net–chess.com, 2012.

3.e4 ab4–/+ 4.Bb2 Nf6 5.e5 Nd5 6.d4 c5 7.c3 bc3 8.Nc3 Qb6 9.Qd2=+ cd4 10.Nd5= ed5 11.Bd4 Qb4 12.Nf3 Qd2 13.Nd2 Nc6–/+ 14.Nb3 Bb4–+ 15.Ke2 Nd4 16.Nd4 Bc3 17.Rd1 Ra2 18.Kf3 Bd4 19.Rd4–/+ Ra3 20.Bd3 0-0 21.Re1 b6 22.Kf4 f6 23.Rd5? fe5–+ 24.Ke4 Rf2 25.Re5 Bb7 26.Kd4 Ra4 27.Bc4 d5 28.Re8?? Kf7 29.R1e7 Kg6 30.Rb7 Rf4 31.Kd5= Rac4 ½–½. Reynier – Chairboy, ChessWorld.net, 2004.

3.Bb2 Nf6 (3...Bb4?? 4.Bg7 Nh6 5.Bh8+–) 4.a3 c5 5.bc5 Bc5 6.e3 Nc6 7.Nf3 b5 8.c4 (8.Bd3 d5+=) 8...bc4+= 9.Bc4 d5 (9...Rb8 10.Qc2+=) 10.Be2 Bd6 11.Qc2 Bb7 12.Nc3 0-0 13.Na4 (13.0-0 e5+=) 13...Rc8+= 14.Qb3 Na5 15.Qb6 Bc7 16.Qb4 Bc6 17.Rc1 (17.Nc5!?+=) 17...Ne4–/+ 18.Nc5 (18.Ba6? Rb8 19.Qd4 f6 20.Rc6 Nc6–+) 18...Nc4 19.Bc4 (19.Rc4!? dc4 20.Ne4 Be4 21.Qc3–/+) 19...Ba5–+ (19...dc4?! 20.Ne4 Be4 21.Rc4=) 20.Ba6 Bb4 21.ab4 Rb8 22.Ne5 (22.Nd4 Be8 23.Ne4 de4–+) 22...Be8 (22...Bb5 23.Bb5 Rb5 24.Nc6–+) 23.Ned3 (23.Bd4 f6 24.Ne6 Qd6–+) 23...Rb6 24.Ra1 (24.Bd4 Nc5 25.Nc5 Qe7–+) 24...Qg5 25.Rg1 Qh4 26.h3 (26.Be5 Nc5 27.bc5 Ra6 28.Ra6 Bb5–+) 26...Bc6 27.Rh1 (27.Ne4 de4 28.Ne5–+) 27...Ra8 28.g3 (28.Rh2 Nc5 29.Nc5 Qb4–+) 28...Qe7 29.Ke2 (29.f4 Ng3 30.Rg1 Qh4–+) 29...Nc5 30.Nc5 Rb4 31.Bd4 (31.Ba3 Qc5 32.Rhc1 Qb6 (32...Ra6?! 33.Rc5 Rc4 34.d4=) 33.Bb4 Ra6–+ (33...Qb4?! 34.Rc6 g6 35.Ra2–+)) 31...e5 32.Nd3 (32.Be5 Qc5 33.Bd3 Ra1 34.Ra1 d4 35.Bd4 Qd5–+) 32...Rd4 33.ed4 ed4 34.Kf1 Bb5! 35.Re1 (35.Bb5 Ra1 Pinning (35...Ra1 Deflection)) 35...Qd7 36.Kg2 Ba6 37.Ne5 (37.Ra1 Qd6 38.Rhe1 Rb8–+) 37...Qd6 38.Nf3 (38.Rhg1 Qb4–+) 38...Bd3 0–1. pman3660 (2005) – rabscuttle (1930), gameknot.com, 2014.

3.c3 d5 4.d4 b5 5.e3 Nf6 6.Bd3 Nc6 7.h3 a5 (7...e5!?+=) 8.Nf3 ab4 9.cb4?? (9.Bb5 Bd7 10.Bc6 Bc6 11.Bb4+= (11.cb4? Ra3 12.Na3 Bb4 13.Ke2 Ba3–+)) 9...Ba6?? (better is 9...Ra3!? 10.Na3 Bb4 11.Ke2 Ba3 12.Bb5 0-0=) 10.0-0 Na7 11.Nc3 c6 12.Ne5 Bd6 13.Qf3 Qc7 14.Ng4 Ng4 15.Qg4 g6 16.Qh4 Be7 17.Qg4 0-0-0 (17...Bd6 18.Rfc1+=) 18.Qf4 (better is 18.Qf3!?+/–) 18...Qf4= 19.ef4 f5 20.Ne2 Kd7 21.Ng3 Bd6 22.Ne2 Nc8 23.h4 Ne7 24.Nc3 Ng8 25.Be2 Bf4 26.g3 Bd2 27.Nd1 Nf6 28.f4 Ne4 29.g4 Ng3 30.Rf3?? (30.Rf2 Bf4! 31.Bd3–+) 30...Ne2 31.Kf2 Nd4 32.Rd3 Nc2 33.Rb1 Na3 34.Ra3 Bb7 35.Ra7 Kc7 36.a4 Ra8 37.Ra8 Ra8 38.a5 Bf4 39.gf5 ef5 40.Kf3 Bd6 41.Nf2 Re8 42.Ra1 Bb4 43.a6 Ba8 44.Nd3 Bd6 45.a7 d4 46.Nc1 Re1 47.Kf2 Rh1 48.Ke2 Rh4 49.Nd3 Kb7 50.Nf2 Be5 51.Nd3 Rh2 52.Nf2 Bg3 53.Kf3 Bf2 54.Ra3 Rh3 (54...Rh3 55.Kf2 Ra3 56.Ke2 Re3 57.Kf2 f4 58.Kf1 d3 59.Kf2 d2 60.Kg2 d1Q 61.Kf2 Qd2 62.Kf1 Re1#) 0–1. Petra Vreeswijk – wullie54, ChessWorld.net, 2012.

3.c3 a6 4.e4 d5 5.Qa4 Bd7 6.Qb3 Nf6 7.b5 Ba3?? 8.Na3?? Na5 9.Qa4 ab5–+ 10.Qb4 Nc6 11.Qb2 0-0 12.ed5 Nd5 13.Bb5 Na5 14.Bd7=+ Qd7 15.Nf3 Nf4–/+ 16.Ne5?? Qd5–+ 17.c4 Qe5!! 18.Qe5 Nd3 19.Kd1 Ne5 20.c5 b6 21.cb6 cb6 22.Re1 Ng4 23.Ke2 Nc6 24.Nc2 Rad8 25.Rab1 Nd4 26.Nd4 Rd4 27.f3 Ne5 28.Red1 Rb8 29.Ke3 Ra4 30.d3 Ra2 31.Rd2 Rd2 32.Kd2 b5 33.f4 Ng4 34.h3 Nf6 35.Ke3 Nd5 36.Kf3 b4 37.g3 b3 38.Rb2 f5 39.h4 Kf7 40.g4 fg4 41.Kg4 Kf6 42.Kf3 Kf5 43.Kg3 Nf4 44.Rf2 Rb4 45.Rb2 Nd3 46.Rb3 Rb3 47.h5 Kg5 48.h6 gh6 49.Kh3 Ne5 50.Kg2 Kf4 51.Kf2 Rb2 52.Ke1 Kf3 53.Kd1 Ke3 54.Kc1 Rg2 55.Kb1 Kd3 56.Kc1 Ng4 57.Kb1 Kc3 (57...Kc3 58.Ka1 Kb3 59.Kb1 Rg1#) 0–1. campocebe – Drunken Pawn, internet, 2010.

3.e4 Ne5 4.d4= Ng6 5.Bd3 d5 6.Nf3 de4=+ 7.Be4 f5 8.Bd3= Nf4 9.0-0+= a5 10.c3 Qf6 11.Bc2 Qg6 12.Re1?? Qg2# 0–1. Vauban – Roseeis, internet, 2006.

3.Nf3 Bb4 4.Bb4 Nb4 5.d4 d5 6.c3 Nc6 7.e3 Nge7 8.Bb5 0-0 9.0-0 a6 10.Bd3 f5 11.Ng5 h6 12.Nf3 Qd6 13.Nbd2 e5 14.de5 Ne5 15.Ne5 Qe5 16.Qc2 c5 17.Nf3 Qf6 18.a4 Bd7 19.Rab1 Bc6 20.c4 d4 21.e4 Qf7 22.Ne5 Qe6 23.Nc6 bc6 24.ef5 Nf5 25.Rbe1 Qf6 26.Re4 Rae8?? (26...Nd6 27.Re2–/+) 27.Rf4?? (better is 27.Re8 Re8 28.Bf5+–) 27...g6–/+ 28.g4 (28.Rb1!?–/+) 28...Qg5–+ 29.Bf5? Qf4 30.Bd7 Re7 31.Qg6 Rg7 32.Be6?? Kh8 33.Qh5 d3 34.h3 d2 35.Qh4 Qf6 36.Qf6 Rf6 37.Bf5 Rf5 38.Rd1 Rf3 39.Kg2 Rd3 40.Kf1 Rgd7 41.Ke2 R3d4 42.f3 Rc4 43.Rd2 Rd2 44.Kd2 Ra4 45.h4 Rf4 46.Ke3 Rd4 47.f4 Kg7 48.h5 a5 (48...a5 49.f5 Rg4–+) 0–1. jcekota (2100) – averoes (2445), net–chess.com, 2011.

3.Qc1?? Qa1 4.e3 Qf6-+ (4...Qa2 5.Nc3 Qa3 6.Qa3+=).

3.Qc1?? Bd6 4.Kd1? (4.Bb2!? Qg6 5.a3=) 4...Bh2 (4...Be5 5.c3 Qf2 6.Nf3-/+) 5.Bb2 Qf2?? (better 5...Be5 6.Be5 Qe5-/+) 6.Nf3+/- Nh6 (6...e5 7.Nh2 d6 8.d4+/-) 7.Bg7 (7.Nh2!? Nf5 8.Nf3+/-) 7...Ng4+= 8.Bh8 (8.Nh2 Nh2 9.Bh8 Nf1+=) 8...Qe1= 9.Ke1 Bg3 10.Kd1 Nf2 11.Ke1 Nh1 12.Kd1 Nf2 13.Ke1 Nh1 14.Kd1 Nf2 15.Ke1 Nh1 ½-½. BlindfoldAccount (2100) - opperwezen (2645), lichess.org, 2016.

3.c3 Qf5 4.Nf3 Nf6 5.g3 a5 6.Nd4 Qd5 7.Qa4?? Qh1–+ 8.e4 Qe4 9.Be2 Qh1 10.Bf1 Ng4 11.Ke2 Qe4 12.Kd1 Nf2 13.Kc1 Qe1 14.Kc2 Qd1 15.Kb2 Qa4 16.Bb5 Qd1 17.Nb3 c6 18.c4 Nd3 19.Kc3 Ne1 20.Bb2 e5 21.ba5 Qc2# 0–1. ChessDiva – Caissa (1990), Live Game Caissa's Web, 2006.

3.Nc3 a5 4.b5?? Ba3–+ 5.Nf3 Bf8 6.d4 b6 7.e4 Bb4 8.Be2 Ne7 9.Qd3 0-0 10.0-0 c6 11.e5 Qf4 12.a3 Bc3 13.Qc3 Nd5 (13...Nd5 14.Qb2 cb5 15.Bb5 Bb7–+) 0–1. stardom (2100) – maf (2100), net–chess.com, 2004.

3.Nc3 Nc6 4.Qb1 a5–/+ 5.Nb5 Bd6 6.c3 ab4= 7.Bb4 Ra5?? 8.Ba5+– Na5 9.e3 c6?? 10.Na7 Ne7 11.Bd3 0-0 12.Qb6+– Qg5 13.g3?? Qc5?? 14.Rb1 Nd5? 15.Qc5+– Bc5 16.Nc8 Rc8 17.Nf3 f6 18.g4 b5 19.a4 ba4 20.h4 a3 21.g5 a2 22.Ra1+/– Nb3 23.0-0 Ra8=+ 24.h5?? h6?? 25.gh6–/+ gh6 26.Bg6?? Kg7 27.Rfd1? Ne7 28.Nh4?? d5 29.d4? Bd6 30.f4 c5 31.Rf1 cd4 32.cd4 Nf5 33.Nf5?? ef5–+ 34.Bf5 Bb4 35.Bc2?? Na1 36.Ra1 Bc3 37.Ra2 Ra2 38.Bb3 Re2 39.Bd5 Re3 40.Bg2 Bd4 41.Kf2 Re5 42.Kf3 Rh5 43.Kg4 Rh2 44.Be4 h5 45.Kf5 Kf7 46.Bd5 Kg7 47.Ke6?? h4–+ 48.Ke7 h3 49.Bf3 Rf2 50.Bh5 h2 (50...h2 51.Bd1 h1Q 52.Kd6 Qd1 53.Kc6 Rc2 54.Kd6 Bg1 55.Ke6 Re2 56.Kf5 Qd7) 0–1. Rettkowski,Marcel (1800) – Lausch,Axel (1950), remoteschach.de, 2010.

(--> 1.b4 d5 2.a4 e6).

3.b5 Nf6 4.Nf3 c5 5.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.a4 e6 4.b5 c5 5.Nf3).

3.Bf6 Be7 4.a3 Bf6 5.Nc3 Bc3 6.dc3 d6 7.Nf3 Bd7 8.e3 Nc6 9.Be2 Nf6 10.0-0 0-0-0 11.b5 a6 (11...Ne7 12.a4+-) 12.bc6 Bc6 13.Nd4 Be4 14.Rb1 Bc2 (14...e5 15.f3 Bg6+-) 15.Qc2 Nd5 16.Qb3 Nb6 17.a4 a5 18.Qb5 (18.Nb5 Rd7 19.Nc7 Rc7 20.Qb6 d5+-) 18...Kb8 19.Bf3 (19.Nc6!? Kc8 20.Nd8 Rd8 21.Qa5 Rd7+-) 19...d5 20.Qa5 Rd6 21.Nb5 Rc6 22.Qa7 Kc8 23.a5 Kd7 24.ab6 Rb6 25.Nc7 Kc7 26.Qb6 Kb8 (26...Kd7 27.Qb7 Kd6 28.Rb6 Ke5 29.Qf7 Rb8 30.Qe6) 27.Qb7 1-0. FeegLood (2730) - alexr22, lichess.org, 2017.

3.Bf6 gf6 4.b5 Nc6 5.bc6 dc6 6.e4 Nh6 7.Nf3 e5 8.d4 Bg4 9.de5 (9.h3 Be6+–) 9...fe5 10.Be2 Rd8 (10...Bf3 11.Bf3 Rg8 12.Qd2+–) 11.Qc1 f5 (11...Bf3 12.Bf3 Bg7 13.Qa3+–) 12.Ne5 (better is 12.ef5 Rd5+–) 12...fe4 (12...Be2 13.Ke2 Bg7 14.c3+–) 13.Ng4 Bc5 14.Qh6 e3 15.Nf6 Kf7 16.Bh5 Ke6 (16...Ke7 17.Qg7 Ke6 18.Bg4 Kd6 19.Ne4 Kd5 20.Qg5 Ke4 21.Bf3 Kd4 22.Qf4) 17.Nh7 Ke7 18.Qf6 Kd7 19.Bg4 Ke8 20.Qe6 Be7 21.Bh5 1–0. DEFFM – GuestYWJB, freechess.org, 2018.

3.Bf6+– gf6 4.c3 c5 5.bc5 Bc5 6.e3 Nh6 7.Nf3 f5 8.Be2 Ng4 9.0-0 f4 10.ef4 Bf2 (10...d5 11.f5! Nc6 12.fe6 Be6 13.Qa4+–) 11.Rf2 b6 (11...Nf2 12.Kf2 Nc6 13.Na3+–) 12.Rf1 Bb7 13.d4 (13.Nd4 Nh6+–) 13...Na6 (13...Ne3 14.Qc1 Nf1 15.Qf1+–) 14.Ba6 d5 (14...Ba6 15.Re1 Nf6+–) 15.Bb7 Rc8 16.Bc8 0-0 17.Ba6 (17.Ne5 Ne3 18.Qh5 Nf5 19.Qg5 Kh8 20.Qf6 Kg8 21.Nf7 Rf7 22.Be6 Nd6 23.Bf7 Nf7 24.Re1 Ne5 25.Re5 h6 26.Re8 Kh7 27.Qf7) 17...Kh8 18.Bd3 Rg8 19.Nbd2 (19.Ng5 f5+–) 19...f6 20.Ne5! f5 (20...fe5 21.fe5 Decoy) 21.Ng4 Rg4 22.Rf2 Rg8 23.Nf3 e5 24.de5 a5 25.Qc2 b5 26.a3 (26.Bb5 Rf8 27.e6 Kg7+–) 26...d4 27.cd4 b4 28.ab4 ab4 29.Rb1 (29.Qc6 Rg6 30.Qc7 Rg8 31.Bf5 Rg2 32.Kg2 b3 33.Qh7) 29...b3+– 30.Qb3 h5 (30...Rc8 31.Qe6 Rf8 32.Qe7 Rc8 33.Rb8 Rb8 34.Qf6 Kg8 35.Bc4) 31.Qb8! Rb8 (31...Rb8 32.Rb8 Mate attack) 32.Rb8 Kh7 (32...Kg7 33.Rb7 Kg6 34.Nh4 Kh6 35.Nf5 Kg6 36.Rg7) 33.Rb7 Kh6 (33...Kg6 34.Nh4 Kh6 35.Nf5 Kg6 36.Rg7) 34.Ng5 (34.Bf5 h4 35.Rh7) 34...h4 (34...Kg6 35.Rfb2 h4 36.R2b6 Kh5 37.Be2) 35.g3 (35.Bf5 Kh5 36.Rh7) 35...hg3 36.hg3 (36.Bf5 gf2 37.Kf2 Kh5 38.Rh7) 36...Kh5 (36...Kg6 37.g4 Kh6 38.Rh2 Kg6 39.Bf5) 37.Kg2 (37.Kg2 Kg6 38.g4 Kh6 39.Rh7 Kg6 40.Bf5; 37.Bf5 Kh6 38.Rh2) 1–0. Fournier,Frederic (1975) – ipafla (1665), Active, 2009.

3.Bb2 c5 4.e3 Nf6 5.Nf3 Be7 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3 Be7).

3.Nf3 c5 4.Bb2 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.b5 c5, without 5.bc6).

3.Bb2 b6 4.Nf3 (4.Nc3 Bb7+=) 4...Bb7 (4...a6 5.c4+=) 5.e3 (5.Nc3 d5 6.e3 Nd7+=) 5...d6 (5...a6 6.c4+=) 6.c4 (6.Nc3 Nd7+=) 6...Nd7 7.d4 (7.Nc3 a6+=) 7...Nf6 (7...a6 8.Nc3=) 8.Nc3 (8.Bd3 g6+=) 8...g6 9.Bd3 Bg7 10.a4 (10.0-0 0-0+=) 10...0-0 11.Ne2 (11.0-0 c5=) 11...Bf3 (11...a6 12.0-0=) 12.gf3 d5 (12...c5 13.0-0=) 13.Ng3 (13.Rg1 Rc8=) 13...dc4 (13...c5 14.dc5 bc5 15.0-0=) 14.Bc4 Rc8 (14...Nfd5 15.Qd2=) 15.Qb3 c6 (15...Nfd5 16.Ne4=) 16.0-0+= h5 (16...Nfd5 17.Ne4+=) 17.h4 (17.Rac1 h4 18.Ne2 c5+=) 17...Ned5 (17...Nfd5 18.Rac1=) 18.Kg2 (18.bc6 Rc6 19.Bb5 Rc8+=) 18...Nh7 (18...cb5!? 19.ab5 Qd7+=) 19.bc6+– Rc6 20.Bb5 (20.Ba3!?+–) 20...Rc7= 21.Ba3 (better 21.Rh1=) 21...Ne7 (better 21...Bd4 22.ed4 Rc3=+) 22.Rac1+– Kh8 (22...Nf6!?+–) 23.Rc7 Qc7 24.Rc1 Qb7 (24...Qd8 25.Qc2 a5 26.Qd2+–) 25.Ne4 Nf5 26.Bf8 Bf8 27.Bc6 (27.Qc3 Kg8+–) 27...Qb8 (27...Qe7+–) 28.Bd7 (28.f4 Qd8+–) 28...Kg7 (28...Nh4!? 29.Kf1 Nf3+=) 29.Qc4 (29.Kf1 Qh2 30.Ke2 Nf6 31.Nf6 Kf6+–) 29…Nh4 1–0. Heise,Robert R – Wells,Rubin A, 15th Red River Shootout, 2017.

3.Bb2 d6 4.e3 Bd7 5.a4 c6 6.Qg4 cb5 (better 6...e5 7.Qf3 Be6=) 7.Bg7?? (7.ab5 e5 8.Qf3 Qc8=) 7...Bg7?? (better 7...Rg8 8.ab5 Bg7-+) 8.Qg7+= Rg8 9.Qh7 ba4 10.Qe4 (better 10.Nc3 Bc6 11.Nf3+=) 10...Bc6=+ 11.Qh7 Nd7 (11...Rg2!? 12.f3 Rg8-/+) 12.Nc3= b5 (better 12...Nf6 13.Qh3 Qd7=) 13.Bb5?? (13.Nb5 Nc5+/-) 13...Bb5?? (better 13...Bg2 14.Ne4 Kf8-/+) 14.Nb5+/- Nf6 (14...Nc5 15.g3+/-) 15.Qd3 Ned5 16.Ra4 Nb6 (better 16...Rg2!? 17.Qa3 Qb8 18.Nd6 Kd7 19.Nf7 Ke8 20.Nd6 Kd7+-) 17.Nd6+- (17.Ra7 Ra7 18.Na7 Qa8+/-) 17...Ke7 (17...Kf8 18.Ra1 Rg2+-) 18.Nb5?? (better 18.Rd4 Nfd5 19.Ne4+-) 18...Qd3-+ (18...Na4 19.Qa3 Ke8 20.Qa4+/-) 19.cd3 a6?? (19...Na4 20.g3-+) 20.Nd4?? (better 20.Ra5 ab5 21.Rb5 Ra1 22.Ke2 Rg2 23.Rb6 Rag1 24.Rg1 Rg1 25.Rb7 Nd7 26.Rb4=+) 20...Rgc8?? (20...Na4 21.g3-+) 21.Nge2?? (21.Ra5 Nbd5+-) 21...Nbd5?? (better 21...Na4 22.Ng3 Rc1 23.Ke2 Rh1 24.Nh1 a5-+) 22.0-0 Nd7 23.h3 (23.h4 Nc5 24.Ra3 Nb4+-) 23...Nc5 24.Ra5 (24.Ra3 Nb4+-) 24...Nd3 25.Rb1 N5b4 26.Nc3 f6 (26...Rc7 27.Ra4 Nc6 28.Rb6 Nd4 29.Rd4+-) 27.Na4 (27.Na2 Nc6 28.Rb7 Kd6+-) 27...Rc7 28.Nb6 (28.Nb2 Ne5+-) 28...Raa7 (28...Rb8 29.Ra3+/-) 29.h4 (29.Ra4 Nc6+-) 29...Rab7 30.Na4 e5 (30...Rb8 31.Nc3+-) 31.Nf5 Ke6 32.g4 Rc4 33.f3 e4? (33...Rbc7 34.Nc3 R7c5 35.Rc5 Rc5 36.h5+-) 34.f4 (34.Nd4!? Kf7 35.fe4 Re7+-) 34...Rh7 (34...Rbc7 35.Nc3 Nc5 36.h5+-) 35.Nc3 Rh8 36.Kg2 Rg8 37.Kg3 Rh8 (37...Rd8+-) 38.Nd4 Kf7 (38...Ke7 39.Ne4 Rf8 40.h5+-) 39.Ne4 Rc7 (39...Rd8 40.Rf5+-) 40.Nd6 (better 40.Rf5 Ke7 41.Rf6 a5+-) 40...Kf8 (40...Ke7 41.N6f5 Kd7+-) 41.Ne6 Kg8 (41...Ke7 42.Nc7 Kd6 43.Na6 Ra8 44.Nb4 Ra5 45.Nd3 Rd5+-) 42.Nc7 1-0. chessbit (1945) - BasharMansour (1885), Rated Rapid game, lichess.org, 2020.

3.Bb2 Ng6 4.c4 c6 5.a4 cb5 6.ab5 a6 7.e3 Be7 (7...d5 8.Nf3+=) 8.Nf3 (8.Bg7 Rg8 9.Bb2 d5+/-) 8...Nh4 (8...0-0 9.d4=) 9.Be2 (better 9.Nh4 Bh4 10.Bg7+-) 9...Ng2=+ 10.Kf1 Nh4 11.Bg7 Rg8 12.Bh6 (12.Rg1 Nf3 13.Bf3 Bd6=) 12...Nf3 13.Bf3 Bg5 (13...Qc7 14.d3=+) 14.Rg1 (better 14.Bg5 Rg5 15.Nc3=) 14...f6?? (better 14...Qf6 15.Ra4 Qh6=+) 15.Nc3 (better 15.h4!? Bh6 16.Rg8 Bf8+-) 15...Qc7 (better 15...Rg6 16.Bg5 Rg5 17.Rg5 fg5+/-) 16.h3 (better 16.Bh5 Ke7 17.Qc2+-) 16...Qc4+= 17.Be2 Qh4 18.Bg5?? (18.Bh5 Ke7 19.Qf3 Qc4 20.Ke1+/-) 18...Qh3-/+ (18...Rg5 19.Rg5 fg5 20.Na4 Qh3 21.Ke1 Qh1 22.Bf1 ab5 23.Nb6+/-; 18...fg5?! 19.Bh5 Ke7 20.Rg3 Qc4 21.Be2=) 19.Ke1 Rg5 20.Rg5 fg5 21.Bf1 (21.Na4 Qh1 22.Bf1 ab5+/-) 21...Qf5 (21...Qh2 22.Na4 ab5+/-) 22.ba6?? (better 22.Na4 ab5 23.Nb6 Ra1 24.Qa1+/-) 22...Na6-/+ 23.Qh5 Qg6 24.Qf3 (24.Qg6 hg6 25.d4 Ke7=+) 24...Nc7 (24...h5 25.Ne4 d5 26.Nd6 Ke7 27.Rc1-/+) 25.Ra8 Na8 26.Nb5? (better 26.Qg3 Kd8 27.Qe5=+) 26...Qb1-+ 27.Qd1 Qd1 28.Kd1 d5 (28...Ke7!? 29.Be2-+) 29.Nd6 Kd7 30.Nf7 g4 31.Nh6 Ke7 32.Ng4 Kf7 (32...Nb6 33.Be2-+) 33.Ne5 Kf6 34.f4 Kf5 (better 34...Nb6-/+) 35.Bd3+= Kf6 36.Bh7 Nc7 37.Bd3 Ne8 38.Ke2 (38.Kc2 Nd6+=) 38...Nd6= 39.Nf3 b6 40.Nd4 (40.Ne5 b5=) 40...Bb7 41.Kd1 e5 42.fe5 Ke5 43.Nf3 Kf6 44.Nd4 Ne4 45.Be2 Nf2 46.Kc2 Ke5 47.Bf3 b5 (better 47...Bc8=) 48.Nb5+/- Ba6 49.Nc3 (49.d4!? Kf5 50.Nc3 Bd3 51.Kd2+/-) 49...Bd3 50.Kc1 Be4 (50...d4 51.ed4 Kd4 52.Bc6+=) 51.Be4 (better 51.d4 Ke6 52.Be4 de4 53.Kd2+/-) 51...Ne4? (51...de4 52.Kc2 Nh1+/-) 52.Ne4?? (52.d4 Kf5 53.Nd5+-) 52...Ke4= 53.Kc2 d4 54.ed4 Kd4 55.d3 Kd5 56.Kc3 Kc5 57.d4 Kd6 58.Kc4 Kd7?? (58...Kc6 59.d5 Kc7 60.d6 Kc8 61.d7 Kd8 62.Kc5=) 59.d5 (better 59.Kd5 Ke7 60.Kc6+-) 59...Kc7 60.Kc5 Kd8?? (better 60...Kd7=) 61.Kc6+- Kc8 62.d6 Kd8 63.d7 Ke7 64.Kc7 Ke6 65.d8Q Ke5 66.Qd6 Ke4 67.Kc6 Ke3 68.Kc5 Kf3 (68...Ke4 69.Qe6 Kd3 70.Kd5 Kc3 71.Qe2 Kb3 72.Kd4 Kb4 73.Qb2 Ka4 74.Kc4 Ka5 75.Qb5) 69.Qd4 (69.Qd4 Kg3 70.Qe4 Kf2 71.Kd4 Kf1 72.Ke3 Kg1 73.Qg6 Kf1 74.Qg5 Ke1 75.Qg1; 69.Kd5 Kg4 70.Ke4 Kg5 71.Qe6 Kh4 72.Qg6 Kh3 73.Kf3 Kh4 74.Qg4) 1-0. Antares_Sco (1900) - Karimmm (1860), Rated Blitz game, lichess.org, 2016.

3.Bb2 Ng6 4.e3 d6 5.c4 e5 6.Nc3 Be7 7.Nf3 0-0 8.Bd3 Nd7 9.Bg6 fg6 10.Nd5 Nf6 11.Ne7 Qe7 12.Ng5 Ng4 13.Nh3 Qf7 Will f2 fall? (13...Nh6 14.Ng1–/+) 14.0-0 (14.Qe2!?=+) 14...Qc4–/+ 15.Qb3 Qb3 16.ab3 Be6 (16...Nf6 17.Ra4–+) 17.b4 (17.Rfc1 Rfc8 18.d4=+) 17...Bc4 (better 17...Nf6!?–/+) 18.Rfc1= Bb5 19.Rc7 Rab8 (19...Bc6 20.d4=) 20.Rac1 (better 20.Ra7!? Bc6 21.d4+–) 20...Nf6= 21.Ng5 (21.d4 Nd5 22.de5 Nc7 23.Rc7 de5 24.Be5+–) 21...Nd5–+ 22.R7c3 (better 22.Be5!? Nc7 23.Bd6–+) 22...Nc3 23.dc3 Bc4 24.Ne4 d5 25.Nd6 (25.Nd2 Rbc8–+) 25...Rf6 26.Nc4 dc4 27.Rd1 Rbf8 28.f3 (28.Rd2 e4–+) 28...e4 29.f4 g5 30.g3 gf4 31.gf4 g5 32.Rd4 (32.Bc1–+) 32...gf4 33.Re4 (33.Kf2 Rh6 34.ef4 Rf4 35.Ke3 Rhh4 36.Rd8 Kf7–+) 33...fe3 34.Re3 Rf1 35.Kg2 R1f2 36.Kg3 Rb2 37.Re7 Rc2 38.Rb7 Rc3 39.Kg4 Ra3 40.b5 (40.Rc7 c3 41.h3 Rb8–+) 40...c3 (40...Rc8!? 41.Re7 c3 42.Re1–+) 41.Rc7 Ra4 (better 41...Rf2–+) 42.Kg5 (42.Kg3 Rb4 43.Rc3 Rb5–+) 42...Rf7 (42...Raf4 43.Rc8 c2 44.Rc5 c1Q 45.Rc1 R8f5 46.Kh6 Rh4) 43.Rc8 (43.Rc3 Kg7 44.Rg3–+) 43...Kg7 44.h4 (44.Rc6 c2! 45.Rc4 c1Q 46.Kh5 Rc4 47.b6 Rf5) 44...Ra3 (44...h6 45.Kh5 Rf5) 45.h5 Threatening mate: h6 45...c2 (better 45...Rb7 46.h6 Kf7–+) 46.h6 1–0. eem63 (1615) – aravind555 (1605), lichess.org, 2019.

3.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 g6).

3.Bb2 Nf6 4.e3 Bg7 (---> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 e6).

3.Nf3 Qg4=.

3.Nf3 Qh6 4.d4 f5?? 5.Bh6+– (5.Bh6 Nh6 6.e3+–) 1–0. poganinbezdom (1675) – izadora1 (1730), kurnik, 2011.

3.g3 Qf6 4.d4 Bd6 5.Bg2 h5 6.e4 Rh6? 7.e5 Qf5?? 8.ed6+– Rf6 9.Nh3 Nh6 10.0-0 Qb5 11.dc7 Nc6 12.d5 Nb4 13.Nc3 Qc5 14.Bb2 Rg6 15.Nf4 Nf5 16.Qh5 Nd6 17.Qh8 Ke7 18.Na4 Qc7 19.Ng6 fg6 20.Qg7 Kd8 21.Bf6 Ke8 22.Qe7# 1–0. MasterofDisaster – alexbruce, Live Game Caissa's Web, 2004.

3.Bb2 (--> 2.Bb2 Qe7 3.c3).

3.e3 Nc6 4.Nf3 b6 5.Bb2 Bb7 6.a3 0-0-0 7.d4 Re8 8.Bd3 Nd8 9.Nbd2 f6 10.0-0 g6 11.Qc2 h5 (11...e5 12.e4+/–) 12.Rfe1 (12.Bg6 Nf7+–) 12...Bh6 (12...g5 13.c4+/–) 13.e4 (13.Bg6!? Nf7+–) 13...Rh7 14.e5 f5 15.c4 a6 16.Nb3 White prepares c5 (16.c5 bc5 17.dc5 h4+–) 16...Kb8 (better is 16...Bf3!? 17.gf3 Qh4=) 17.c5 Ka7 18.cb6 cb6 19.Qc4 Nc6 (better is 19...Nf7 20.Be2 Rc8+/–) 20.Qa6?? (better is 20.b5 Nb8 21.ba6+/–) 20...Ba6–+ 21.Ba6 (21.b5 Bb7 22.bc6 Bc6–+) 21...Ka6 22.a4 (22.Rad1 Ka7–+) 22...Kb7 (better is 22...Qb4 23.Nc5 bc5 24.Ba3–+) 23.b5 Nd4! 24.Nbd4 (24.Bd4 d5 Passed pawn; 24.Nbd4 Qb4 Combination; 24.Nfd4 Qd8 Combination) 24...Qc5 (better is 24...g5 25.Ba3 Qg7–+) 25.Rac1 (25.a5–+) 25...Qa3 (better is 25...Bc1 26.Bc1 Ra8–+) 26.Ba3+– Bc1 27.Rc1 Rc8 28.Rc8 Kc8 29.h3 Kb7 30.Kh2 (30.Ng5 Rh8 31.Bf8 h4+–) 30...Ne7 31.Be7 Re7 32.Nb3 Re8 33.a5 Rc8 34.ab6 (34.a6!? Ka7+–) 34...Rc2 35.Nbd4 (better is 35.Nfd4 Rc3 36.h4+–) 35...g5?? (better is 35...Rf2 36.Nb3 Rc2+/–) 36.Nc2+– h4 (36...Kb6 37.Ng5 Kb5 38.Kg3+–) 37.Ncd4 g4 38.hg4 fg4 39.Ne1 (better is 39.Nh4 Kb6 40.Kg3 Kc5+–) 39...h3 40.gh3 gh3 41.Kh3 Kb6 42.Kg2 d5 (42...Kb7+–) 43.Nef3 (43.Nef3 Kc5 44.Ne6 Kb5 45.Nfd4 Ka5 46.f4+–) 1–0. Fournier,Frederic (2035) – DarthVader17 (1865), Active Blind, 2008.

3.Qa4 Nd5 4.Nf3+=.

3.Qa4 Nf5 4.e3 (4.Nf3 b6=) 4...c6 (4...Nc6 5.Na3+=) 5.g3 (5.Nf3 b5 6.Qa5 Qa5 7.ba5 d5=) 5...g6 (5...Na6 6.d4+=) 6.Bb2 (6.e4 Nd6 7.e5 Nf5=) 6...Nd6 (6...Bg7 7.Nf3 d5 8.Na3+=) 7.Bg2 (7.c4!? Rg8 8.c5+=) 7...Nc4= 8.Bc1 (8.Qb3 d5+=) 8...Be7 (8...b5 9.Qb3=) 9.b5 (better is 9.Nf3=) 9...0-0?? (better is 9...Nb6 10.Qb3 cb5 11.Qb5 0-0–/+) 10.Qc4+– d5 11.Qa4 (11.Qb3 cb5 12.Nf3 Bd7+–) 11...Bd7 12.bc6 bc6 (12...Nc6 13.Qc2+–) 13.Qb3 (13.d3 c5 14.Qc2 Nc6+–) 13...Qc7 (13...c5 14.Nf3+–) 14.Ne2 Na6 15.Qc2 Nc5 (15...Rab8 16.0-0+–) 16.d4 Na6 (16...Ne4 17.Be4 de4 18.Nd2+–) 17.c4 (17.e4 e5+–) 17...Bb4 (17...c5 18.0-0 Nb4 19.Qc3 cd4 20.ed4 Qc4 21.Qc4 dc4 22.Ba8 Ra8 23.Ba3+–) 18.Nd2 (18.Nbc3 Ba5 19.a3 c5 20.cd5 cd4 21.ed4 Ba4+–) 18...Be8 (18...Rab8 19.a3 Ba5 20.Ra2+–) 19.a3 Ba5 (19...Bd6 20.Rb1+–) 20.c5 (20.0-0 Rb8 21.Nb3 c5 22.Na5 Qa5 23.cd5 ed5+–) 20...Qe7 (20...e5 21.0-0 Bd7 22.de5 Qe5 23.Nb3+–) 21.0-0 Qf6 (21...Rb8 22.Qd3 Rb5 23.Nb3+–) 22.Bb2 (22.Qa4 Bd2 23.Bd2 Nc7+–) 22...Bc7 (22...Rb8 23.Rab1+–) 23.e4 (23.Bc3 Bd7+–) 23...Ba5 24.e5 (24.Nf4 Rb8 25.Rab1 Bd7+–) 24...Qd8 (24...Qf5 25.Qf5 ef5 26.Bc3 Bc3 27.Nc3+–) 25.Nb3 (25.Rab1 Rb8+–) 25...Bc7 26.Qc3 (26.Bc3 Bd7+–) 26...Rb8 (26...f6 27.Rab1+–) 27.f4 (27.Nf4 Bd7+–) 27...Rb5 (27...Bd7 28.Rab1+–) 28.a4 (better is 28.Rab1+–) 28...Ra5 (28...Rb7+–) 29.Na5 (29.Qd2 Nb8+–) 29...Ba5 30.Qc2 (30.Qd3 Nc7+–) 30...Nb4 (30...Qc7 31.Rfb1+–) 31.Qc1 (better is 31.Qd2 Na6 32.Bc3 Bc3 33.Nc3 Bd7+–) 31...Nd3 32.Qc2 f6?? (32...Nb4 33.Qd2 Na6+–) 33.Qd3+– Bd7 34.Bc3 Bc8 35.g4 (35.Rab1 Bc3 36.Nc3 Kg7+–) 35...Rf7 36.Qd2 (better is 36.Rab1 Bc7+–) 36...Ba6 (36...Bc3 37.Nc3 Ba6+–) 37.Ba5 Qa5 38.Qa5 Be2 39.Rfe1 Bg4 40.h3 Bf5 41.ef6 Rf6 42.Qa7 Bd3 43.Qc7 Rf7 44.Qc6 e5 45.fe5 Rf4 46.Qd5 Kg7 (46...Kf8 47.e6 Be2 48.Qe5 Kg8 49.e7 Bb5 50.Bd5 Rf7 51.ab5 h6 52.e8Q Kh7 53.Qf7) 47.e6 (47.e6 Rf6 48.e7 Bc2 49.e8Q Rf1 50.Bf1 Bf5 51.Qdg8 Kh6 52.Qe7 Bh3 53.Qgh7) 1–0. Benreguia,Frederic – Percy,Dale, FICGS, 2012.

3.Bb2 Ng6 4.e3 Be7 5.Nf3 0-0 6.d4 Kh8 7.a3 f5 8.Bd3 d5 9.Nbd2 Bf6 10.Qc2 Nd7 11.0-0 Rb8 12.Rfe1 b6 13.Rac1 Bb7 14.Qb1 c5 15.dc5 bc5 16.Bf1 cb4 (better is 16...c4!?+=) 17.cb4+= Bb2 18.Qb2 Bc6?? (18...Qb6 19.h4+=) 19.Be2 (19.Rc6 Rb6 20.Rec1 e5+–) 19...a5?? (19...Qb6 20.Qc2 Rfc8 21.Nd4+=) 20.b5 (better is 20.Rc6!? ab4 21.Re6 Nc5+–) 20...Bb5? (better is 20...Bb7+=) 21.Bb5+– Rb5? (21...e5+–) 22.Qa1 (better is 22.Qb5 Nf6 23.Nd4+–) 22...Rb8 23.Rb1 Rb1 24.Qb1 Nf6 25.Qa1 Re8 26.Nd4 Ne4 27.Ne4 fe4 28.Rd1 e5 29.Ne2 Qf6?? (29...Qa8 30.Qb2–/+) 30.Ng3?? (30.Rd5 a4 31.Ng3 Qf8+/–) 30...d4?? (better is 30...Rf8 31.Rd5 Qf2 32.Kh1 Qe3 33.Ra5 Qd3–/+) 31.ed4+/– ed4 32.Rd4 (better is 32.Qd4!? Nf4 33.Qa4+/–) 32...e3= 33.fe3 Ne5 (better is 33...Re3!? 34.Nh5 Re1 35.Qe1 Qd4 36.Kh1 h6=) 34.Rd1 Nf3?? (better is 34...Qg5 35.Qc3 h6+/–) 35.gf3+– Qa1 36.Ra1 Re3 37.Kf2 h6 (37...Rd3+–) 38.Ke3 1–0. Fournier,Frederic (1960) – cosgaya73 (1965), Active Blind, 2008.

3.e3 Ng6 4.Nf3 Be7 5.Bb2 c6 6.a3 0-0 7.d4 Bf6 8.Bd3 Re8 9.Qc2 a5 10.Nbd2 ab4 11.ab4 Ra1 12.Ba1 b6 13.Bb2 Bb7 14.0-0 Qc8 15.Ra1 Ba6 (15...c5!?+=) 16.Ba6+/– Na6 17.Qd3 (17.Nc4 Rd8+/–) 17...Nc7 18.e4 d5 19.e5 Be7 20.Qc2 Nf8 21.Re1 Rd8 22.g3 Ne8 23.Kg2 Nd7 24.Ra1 c5 25.bc5 bc5 26.Rb1 (26.c4 dc4 27.Nc4 Qc6=) 26...c4 (26...cd4 27.c4–/+) 27.Ba1 Nf8 28.Bb2 Rd7 29.Bc1 Rc7 30.Nf1 Nd7 31.Ne3 Qd8 32.Bd2 Rc8 33.h3 Rb8 34.Nh4 (better is 34.Rb8!? Nb8 35.Kh2+=) 34...Rb1–/+ 35.Qb1 Bh4 36.gh4 Qh4 37.Kf1 (37.Qb7 Qd8–/+) 37...Qe7 (37...Qh3 38.Ke1 Qh1 39.Nf1–+) 38.Ng2 g6 39.h4 h6 (39...f6 40.Bf4–+) 40.Qc1 (40.Bh6 Ng7=) 40...Kh7 (better is 40...h5!?–/+) 41.Bh6= Nc7 42.Bg5 Qf8 43.Kg1 Nb8 44.Nf4 Nc6 45.Ne2 Ne8 46.f4 Ng7 47.Qe1 Nf5 48.Ng3 Nce7 49.Be7 Ne7 50.Ne2 (50.Qe2 Qa8 51.Qf3 Qa1 52.Kg2 Qb2 53.Kh3 Qd2=) 50...Qc8 (better is 50...Qh6!?–/+) 51.Qf2 Nc6 52.Ng3 Qb8 53.Kg2 Na5 54.Qe3 Nb3 55.Kh3 Qf8 56.Nh1 Qh6 57.Qf3 Qf8 58.Nf2 Qa3 (58...Qa3 59.f5 Nd4 60.fg6 fg6 61.Qf7 Kh8=) 0–1. Fournier,Frederic (1855) – Piedeperro (1835), Active Blind, 2011.

3.e3 Ng6 4.Nf3 Be7 5.d4 Bf6 6.Bd3 c6 7.Bb2 b6 8.Nbd2 a5 9.a3 0-0 10.0-0 Re8 11.Qc2 Ba6 12.Ba6 Na6 13.Rfe1 Nc7 14.e4 ab4 15.ab4 Ra1 16.Ra1 d5 17.ed5 ed5 18.Re1 Re1 19.Ne1 Qe7 20.Nef3 Ne6 21.Qc1 h6 22.Qe1 Ngf8 23.h3 c5 24.bc5 bc5 25.Ne4?? (better is 25.dc5 Qc5 26.Nb3+=) 25...de4–+ 26.Qe4 cd4 27.cd4 (27.Nd4 Bd4 28.cd4 Qb4–+) 27...Qc7 (better is 27...Nd4!? 28.Qe7 Nf3 29.gf3 Be7 30.Be5–+) 28.Qb1 Ng5 29.Ng5 Bg5 30.Qa1 Bf6 31.d5 Bb2 32.Qb2 Qd7 33.Qd2? (33.Qb3 Qe8 34.Qc3 Nd7–+) 33...g6 (33...Nh7!? 34.d6–+) 34.d6 Kh7 35.g3? (better is 35.Qd5–+) 35...Ne6 36.Kh2 h5 37.h4 Nd8 38.Kg1 Nb7 39.Kh2 Nd6 40.Qc2 Qe6 41.Qd2 Nf5 42.Qa2 (42.Qd3–+) 42...Qa2 (42...Qa2 43.Kg2 Ne3 44.Kf3 Ng4 45.Ke4 Qd2 46.Kf3 f5 47.Kg2 Qf2 48.Kh3 Qf1) 0–1. Fournier,Frederic (1810) – Piedeperro (2020), Active, 2011.

3.Nf3 a5=.

3.d4 d5 4.Nf3 Nf6 5.Bg5 Be7 6.e3 c6 7.Nbd2 0-0 8.Bd3 Nbd7 9.Qc1 Ne4 10.Be7 Qe7 11.0-0 Ndf6 12.a3 Bd7 13.Ne5 Nd2 14.Qd2 Ne4 15.Qb2 a6 16.c4 Nd6 17.Rfc1 Nf7 18.Nd7 Qd7 19.Qc3 Nd6 20.f3 dc4 21.Bc4 Nc4 22.Qc4 Qd5 23.Rab1 Rfd8 24.Rc3 Rd7 25.Qe2 Re7 26.Rc5 Qd6 27.Rd1 Rd8 28.Re5 Qc7 29.Rc5 Rd5 30.e4 Rc5 31.bc5 g6 32.Re1 Kf7 33.g3 Qd7 34.Qc4 Kg7 35.Kg2 Kf6 36.Qc3 Kf7 37.Rb1 Kf8 38.h3 h5 39.Qe3 Kg8 40.Qg5 Rg7 41.Qf6 Qe8 42.Rb6 Qd7 43.a4 Kh7 44.Qe5 Rf7 45.Rb3 Rg7 46.Rb2 Rf7 47.Rb1 Rg7 48.Rb3 Rf7 49.Re3 Rg7 50.f4 Rf7 51.Kf3 Kg8 52.Kg2 Rg7 53.Re2 Rf7 54.Re3 Rg7 55.Re2 Rf7= 56.Re3 (better is 56.a5+/–) ½–½. Caissa – POWERSof10, Live Game Caissa's Web, 2005.

3.d4 Nf6 4.Nf3 g6 5.Bg5 Bg7 6.Nbd2 0-0 7.e4 Qe8 8.Bf6 Bf6 9.e5 Bg7= 10.Be2 d6 11.0-0 d5 12.Nb3 c6 13.Ng5 h6 14.Nf3 g5 15.Ne1 b6 16.Nc2 Ba6 17.a4 Be2 18.Qe2 Qg6 19.c4 Nd7 20.Rfc1 h5 21.cd5+/– cd5 22.Na3 Rfc8 23.Qa6+– Qe8 24.Nb5 Qd8 25.Nd6 Rc1 26.Rc1 Bf8 27.Qb7 (27.Qb7 Rb8 28.Qa7+–) 1–0. huimre (2695) – sagaz (2370), net–chess.com, 2007.

3.e3 d5 4.Qb3 Nf6 5.a4 c6 6.b5 Bd6 7.Ba3 Nbd7?? (better is 7...c5+=) 8.Bd6+– Ne4 9.Qa3 Ndf6 10.Be5 Ng4 11.Bd4?? (better is 11.Bg3+–) 11...Ngf2–/+ 12.Bd3?? (12.Be2!?–/+) 12...Nh1 (better is 12...Nd3 13.Ke2 Ndf2–+) 13.Nf3 Nhf2 14.Be4 fe4 15.Ng1?? Nd3 16.Ke2 Qe7 17.Qe7 Ke7 18.c4 Rf8 19.Nh3 e5 20.Bc3 Bh3 21.gh3–+ Rf2 22.Kd1 Raf8 23.Kc2 Rf1 24.Na3 Ra1 25.Ba1 Rf2 26.cd5 Ne1 27.Kd1 Rf1 28.Ke2 Rh1 29.Be5 Rh2 30.Bh2+– cd5 31.Ke1 h5 32.a5 g5 33.Nc2 g4 34.hg4 hg4 35.Nd4 b6 36.Nc6 Ke6 37.ab6 ab6 38.Kf2 Kd7 39.Kg3 Kc7 40.Kg4 Kd7 41.Nb4 Ke6 42.Nc6 d4?? 43.Nd4+– Kd5 44.Kf5 Kc5 45.Ke4 Kc4 46.Bc7 Kb4 47.Bb6 Ka3 48.Bc5 Kb2 49.b6 Kc1 50.b7 Kd2 51.b8Q Kc3 52.Qb4 1–0. maddoxdb – samp1086, gameknot.com, 2011. (=1.c3 f5 2.b4 e6)

3.Nf3 Nf6 4.d3 (--> 1.b4 f5 2.Nf3 e6 3.c3 Nf6 4.d3).

3.Ba3 Bg7 4.e4 Nc6 (4...d5 5.ed5 Qd5 6.d4=) 5.g3 (5.d4 d6+=) 5...Nf6 6.Bg2 Ne5 (6...d5 7.b5 Ne5 8.d4=) 7.d4 Nc4 8.e5 Nd5 (8...Na3? 9.ef6 (9.Na3?! Nd5=) 9...Qf6 10.Na3+–) 9.Ne2 0-0 10.Nf4 (10.Qd3 b5+=) 10...Nf4 11.gf4 d5 12.0-0 Qh4 13.Bc1 b6 14.a4 Ba6 15.b5 Bb7 16.Nd2 Na5 17.Ba3 Rfd8 18.Qf3 g5 (better is 18...Bh6!? 19.Qg3 Qf4=) 19.f5 g4 20.Qf4?? (better is 20.Qd3+=) 20...Bh6–+ 21.Nf3 Qh5 (better is 21...Bf4 22.Nh4 Bg5–+) 22.Qg3= Qf5 23.Nh4 Qh5 24.Nf3 Nb3 25.Rab1+= Nd2 26.Nd2+/– Bd2 27.Bf3 Bc3+= 28.Bg4 Qg6 29.Kh1?? Bd4–+ 30.Rg1 Kh8 31.Qh4? Qe4 32.f3 Qd3?? 33.Qf6 Kg8 34.Bf5 Bg1 35.Rg1 1–0. Willi_weizenkeim – Kikeluz, playchess.de, 2002.

3.e4= Bg7 4.d4+= a6 5.Nf3 Bf6 (5...d6 6.Bd3+=) 6.Be2 h6 7.e5 Be7 8.0-0 g5 9.Be3 g4 (9...d6 10.Bd3+/–) 10.Nfd2 h5 11.a4 b6 (11...d6 12.Re1+/–) 12.a5 b5 13.Bd3 (13.f3 g3+/–) 13...Bb7 14.Ne4 (14.Re1 d6+/–) 14...Be4 (14...d6 15.f4+/–) 15.Be4 c6 16.Re1 (16.Bd3 d6+/–) 16...Qc8 (16...Bg5 17.Na3+/–) 17.Bd3 Kd8 18.Na3 Kc7 (18...f5 19.Qb3+/–) 19.Qb3+– Qb7 20.Rac1 Qc8 (better is 20...d5+–) 21.c4 Kd8 22.d5 cd5?? (22...Qb7+–) 23.cd5 Qb7 24.Bb6 Ke8 25.Rc7 Qd5 26.Rc8 Bd8 27.Rd8 Ke7 28.Rc8 (better is 28.Qc2 f5 29.ef6 Kf6 30.Qc3 e5 31.Be4+–) 28...Qb3 (28...f5 29.ef6 Nf6 30.Qd5 Nd5 31.Rh8 Nf4+–) 29.Bd8 Kf8 (29...Ke8 30.Bf6) 30.Bf6 1–0. b4_player (2220) – amigoes (1700), GameColony.com, 2003.

3.Nf3 Bg7 4.g3 b6 5.Bg2 Bb7 6.Nh4 Bg2=+ 7.Ng2 Nc6 8.0-0 Nb4–/+ 9.d4 Nd5 10.Na3? Nc3–+ 11.Qd3 Nd5 12.Qf3? Bd4 13.Rb1 Nc3 14.Rb4? Bg7 15.Bb2=+ a5 16.Rc4+= Ne2 17.Qe2 Bb2 18.Qb2 f6 19.Qc2 c6 20.Rc3 Ne7 21.Rf3 Nd5 22.Ne3 Nb4 23.Qb3 Rb8 24.Qc3 0-0 25.Ng4 Kg7 26.h4 Na2 27.Qb2 Nb4–+ 28.Nc4 b5 29.Nd2 Nd5 30.Ne3 a4 31.Nd5 ed5 32.g4 Kg8 (32...Kg8 33.h5 gh5 34.gh5 Qe8–+) 0–1. LuckyMiki – pbram143, internet, 2007.

3.Rb1 Ba5 4.Rb5 Bb6 5.Na4? a6?? 6.Nb6=+ cb6 7.Ba3?? ab5–+ 8.f4 Ra3 9.Nf3 Ra2 10.e3 Nf6 11.Bc4 bc4 12.0-0 0-0 13.d3 b5 14.Qb1 Qa5 15.Nd2 d5 16.dc4 bc4 17.Nb3 cb3 18.cb3 Ne4 19.b4 Qa4 20.g3 b6 21.h4 Qc2 22.Qe1 Qg2 0–1. idontknow – guerino (2100), net–chess.com, 2006.

3.e4 Qf6 4.Nf3 Bc3–/+ 5.dc3 Qc3 6.Bd2 Qc6 7.Bd3 d6 8.0-0 Nf6 9.c4 Ne4 10.Be4? Qe4–+ 11.Rc1 h6 12.Re1 Qg6 13.Bb4 Nc6 14.Ba3 0-0 15.c5 e5 16.cd6–/+ Bh3 17.g3? cd6–+ 18.Qd6 Qd6 19.Bd6 Rfe8 20.Be5?? Bg4–+ 21.Kg2 Ne5 22.Re5?? Re5 23.Ne5–/+ Be6 24.Rc7? b5 25.a3–/+ a5 26.f4 a4 27.Rb7?? Bc4 28.Nc4+= Rc8?? 29.Nd6+– Rc2 30.Kh3 Rb2 31.Rf7 b4 32.ab4 Rb4 33.Ra7 Rd4 34.Nb5 Rb4 35.Nc3 Rb3 36.Ra4 Rc3+/– 37.Kg4 g6 38.Ra6 Kg7+/– 39.h4 Rc5 40.Kf3 g5? 41.hg5 hg5+/– 42.Kg4 gf4 43.gf4 Rc4 44.Ra5 Kf6+/– 45.Rf5 Kg6 46.Rg5 Kf6 47.Rf5 ½–½. oracleinshadows (1725) – nwishn (1900), net–chess.com, 2006.

3.Ne4 Bf8 4.f3 d5–+ 5.d4?? de4 6.e3 ef3 7.Nf3 Bb4 8.Nd2 Bc3 9.Rb1 Nf6 10.Rb3 Ne4 11.Bd3 Qh4 12.g3 Bd2 13.Bd2 Ng3! 14.Rg1 Ne4 15.Kf1 Qf2 0–1. formrtexn – maf (1740), net–chess.com, 2002.

3.Nf3 Nf6 4.e4 0-0 5.Bb2 b6 6.Bd3 Bb7 7.0-0 Nc6 8.a3–/+ Be7 9.h3 Re8 10.e5 Nd5 11.Nd5 Bf8?? 12.Ne3+– Ne7?? 13.c4 d5?? 14.cd5 Nd5 15.Nd5 Bd5 16.Rc1 g6 17.Bc3 Bg7 18.Qe2 Qd7 19.Ba1 c5 20.Qd1 a6 21.Re1 b5 22.h4 Rec8 23.Be4 Be4 24.Re4 Rd8 25.Rc5 Rdc8 26.Rc8 Rc8 27.Rd4 Qb7 28.Rd6 Bf8 29.Rd3 Be7 30.a4 Qe4 31.Rd7 Kf8 32.Ng5?? Bg5+= 33.Ra7 Bh6 34.Ra6= ba4 35.Ra4+= Qd5 36.Rd4+/– Qb5 37.Rd6 Bg7 38.d4+= Ke8 39.g4?? Bf8–+ 40.h5 Bd6 (40...Bd6 41.hg6 Bb8 42.gh7 Ke7–+) 0–1. oracleinshadows (1725) – guerino (2100), net–chess.com, 2006.

3.a3 c6 4.d4 Nf6 5.h3 Bd6 6.Bg5 Be7 7.Nf3= b5 8.Ne5 h6 9.Bh4 g5 10.Bg3= Nbd7?? 11.f3?? Bb7 12.e3 Ne5 13.Be5 Rg8 14.g4 Nd7 15.f4? Ne5?? 16.fe5=+ Qd7 17.Qf3 Rf8 18.Bd3 a6 19.Rf1 0-0-0 20.Ne2 f6 21.Qg3 Rg8?? 22.ef6+/– Bf8 23.Nc1 Bd6+/– 24.Qg2 Rh8 25.f7 Rhf8 26.Bg6 Kb8 27.Nb3 Qc7 28.Rf6 Bg3 29.Kd2 Bh4 30.Re6 Bc8 31.Nc5 Qb6 32.Re8 Rd6 33.Rf8 Rf6 34.Nd7 Kc7 35.Nf6 Be6 36.Qh2 Kb7 37.Rb8 Ka7 38.f8Q Qb8 39.Qfb8 (39.Qhb8) 1–0. valerypavlovich (2120) – sburritt, net–chess.com, 2006.

3.a3 Bd7 4.e3 Nc6 5.d4 a6 6.Bb2 a5 7.b5 a4? 8.bc6+– bc6 9.Bd3 Ba3?? 10.Ba3 g5 11.Nge2 h5 12.0-0 f5 13.Nb5! cb5 14.Bb5?? Bb5=+ 15.Re1 Be2 16.Qe2 Nf6 17.Rec1 1–0. Fournier,Frederic (1965) – s2lari (1700), Active Blind, 2008.

3.Nf3 c5 4.Ba3?? b6 5.bc5+= bc5 6.Rb1 Nc6 7.Na4 Nf6 8.Bc5 Bc5= 9.Nc5 Qa5 10.Ra1?? Qc5–+ 11.e3 0-0 12.Bb5 Bd7 13.Bf1 Ne4 14.d3 Qc3 15.Nd2 Nd2 16.Be2 Nb4 17.Rb1 Nc2 18.Qc2 Qc2 19.Rd1 Qa2 20.e4 Ba4 21.Rc1 Rac8 22.Rd1 Bd1 23.Bd1 Rc1 24.Ke2 Qa1 25.Kd2–+ Rd1! 26.Rd1 Qa2 27.Ke3 de4 28.de4 Qb3 29.Ke2 Qc2 30.Ke1 Rb8 31.f3 Rb1 32.Rb1–+ Qb1 33.Ke2 a5 34.Kd2 a4 35.Ke3 a3 36.Kf4 a2 37.Kg4 a1Q 38.g3 Qf6 39.Kh3 Qg6 40.f4 Qge4 41.Kh4 Qb5 42.Kh3 Qh5# 0–1. Doering,Kathrin – Oltzen,Aljoscha, Schleswig Holstein–ch U10, 2004.

3.b5 b6 4.d4 d5 5.dc5?? Bc5?? 6.Ba3? Nf6 7.Nf3 Ba3 8.Na3 0-0 9.e3 a6 10.e4? Ne4 11.Qd3 Nc5 12.Qd4 ab5 13.Nb5 Ra4 14.Bd3 Nd3 15.Ke2?? Rc4 16.Qd3 Re4 17.Kd1 Ba6 18.Ng5?? Qg5 19.Re1 Re1 20.Ke1 Qe5 21.Kd2 Qa1 22.Qb3 Qf1 23.Nd4 Qf2 24.Kc3 Qe3 25.Kc2 Rc8 26.Kb2 Qd4 27.Ka3 Rc3 (27...Rc3 28.Kb2 Re3 29.Ka3 e5 30.Qe3 Qe3 31.Kb2 Qd2 32.Kb3 Bc4 33.Ka3 Qa2 34.Kb4 Qb3) 0–1. kong – Garyman, ChessWorld.net, 2005.

3.bc5 Bc5 4.Bb2 Nf6 5.e3= 0-0 6.Nf3 Nc6 7.Be2 d5 8.0-0 d4 9.ed4 Nd4 10.Nc3 Nf3 11.Bf3 Rb8 12.Na4 Bd4 13.Rb1 a6 14.c5 Bb2 15.Rb2 Bd7 16.Nb6 Bb5 17.Re1 Nd7 18.Nd7 Qd7 19.d4 Rfd8 20.Rd2 Bc6 21.Qb3 Bf3 22.Qf3 b5 23.c6 Qc7 24.Rc1 Rd6 25.h3 Rb6 26.d5 ed5 27.Rd5 Rbc6 28.Rc6 Qc6 29.Rd6 Qd6 30.Qa8 Qf8 31.Qa6 b4 32.Qc4 g6 33.g4 Kg7 34.g5 h5 35.h4 f6 36.Qd4 Qe7 37.gf6 Qf6 38.Qb4 Qa1 39.Kg2 Qa2 40.Qd4 Kh6?? 41.Qf4 Kh7 42.Qf7?? Qf7–+ 43.f3 Kh6 44.f4 Qf4 45.Kh3 g5 46.hg5 Qg5 47.Kh2 h4 48.Kh1 Qd2 49.Kg1 h3 50.Kh1 h2 (50...Qg2) ½–½. nizinna – jackofhearts, kurnik, 2011.

3.a3 Be7 4.d4 Nf6 5.Bc4 0-0 6.Ne2 b6 7.Bd2 Bb7 8.f3 d6 9.0-0 Nbd7 10.Nbc3 a6 11.e4–/+ Re8 12.Ba2 Rc8 13.e5? Nd5 14.Nd5–/+ ed5 15.ed6 Bd6–+ 16.c4 Nf6 17.cd5 Nd5 18.Nc3? Nf6 19.Bg5 h6 20.Bf6 Qf6 21.Bb3?? Re7 22.Ne4 Qg6 23.Nd6 cd6 24.a4 Rce8 25.Rc1 Re2 26.Rc2?? Qg2 0–1. oracleinshadows (1725) – kostaspetidis (2105), net–chess.com, 2006.

3.Ba6 ba6 4.Qh5 (4.Ba3 Nc6 5.Bb4 Nb4 6.a3-+) 4...Bd2! 5.Bd2 (5.Nd2 Bb7 Combination; 5.Bd2 Bb7 Combination; 5.Kd2 Qf6 Combination) 5...Qh4?? (better 5...Bb7 6.Bc3 Nf6-+) 6.Kd1 (6.Qh4 Ne7+-) 6...Qh2 (better 6...Qh5 7.f3 Qg6-+) 7.Rh2 Nh6 (7...Nf6 8.Qg5 Rg8 9.Bc3+-) 8.Nh3 (8.Qg5 Nf5 9.e4 Ne7 10.Qg7 Rg8+-) 8...a5 (8...Nc6 9.e4 Ng8 10.Ng5+-) 9.Ba5 (better 9.Bc3 Rg8 10.Bg7 Rg7 11.Qh6+-) 9...e5 (9...Nc6 10.Bc7 d5 11.Qf3+-) 10.Bc7 (better 10.Qe5 Kf8 11.Bc7+-) 10...Na6 (10...d6 11.Qg5 0-0+-) 11.Be5 (11.Qe5 Kf8 12.Bd6 Kg8 13.Qe8) 11…Nb4 (11...Nb4 12.Bg7 d5 13.Qh6 Rg8+-). Sahaanahandhok – unjournakamura, Rated Bullet game, lichess.org, 2021. (=1.e3 e6 2.b4)

3.Ba6 Bd2 4.Qd2 ba6 5.Qd7?? (better 5.e4-/+) 5...Nd7-+ 6.Nc3 (6.Bb2 e5 7.Nd2 Rb8-+) 6...Qg5 7.Nb5 Qe3! 8.Be3 (8.Be3 ab5 Combination; 8.fe3 ab5 Combination) 8...ab5 9.Ba7 (9.Nf3-+) 9...Ra7 10.Rd1 (10.Ne2 b4-+) 10...Ra2 11.Rd7 (11.Kd2 Ngf6 12.Rb1 Ne4 13.Ke3 Ndf6-+) 11...Rc2 (11...Kd7 12.Kd2-+) 12.Rc7 (12.Kd1 Rf2 13.Rc7-+) 12...Rf2 (better 12...Rc7 13.Ne2 Nf6-+) 13.Rc8=+ 0-1. unjournakamura – filantropsjanis, Rated Bullet game, lichess.org, 2021. (=1.e3 e6 2.b4)

3.Bb2 Nf6 4.c4 0-0 5.Nf3 d5 6.Qb3 Be7 7.Nc3 c5 8.d4 cd4 9.Nd4 Nc6 10.Nc6 bc6 11.Be2 e5 12.0-0 Bf5 13.Qa4 d4 14.ed4 ed4 15.Nb1 c5 16.Nd2 Qc7 17.Bf3 Rab8 18.Ba3 Bd6 19.g3 Rb6 20.Qd1 g6 21.Re1 h5 22.Ne4 Be4 23.Be4 Re8 24.Bf3 Re1 25.Qe1 h4 26.Bc1 hg3 27.hg3 Be5 28.Kg2? d3–+ 29.Bg5 Ba1 30.Qa1 Qd6 31.Qc3 Nd7 32.Bd5 Qe5 33.Qd2? Rb2 34.Qc1 Rc2 35.Qe3 Qe3 36.Be3 d2 37.Bf3 Ra2 38.Be2 Ra1 39.Bd2 Ra2 40.Bg4 f5 (41.Bf5 gf5–+; 40...Rd2!? 41.Bd7 Rd7 42.g4–+) 0–1. Krafzik,Joachim – Walkewitz,Hubert, Bayern–ch Seniors, 2003.

3.Bb2 Bf8 4.Nf3 Nf6 5.a3 Be7 6.c4 0-0 7.d4 b6 8.Be2 Bb7 9.0-0 d5 10.cd5 Bd5 11.Nc3 Bb7 12.Rc1 Nc6 13.h3 Nd5 14.Nd5 ed5 15.Qc2 Qd7?? 16.Bd3 Bf6? 17.Bh7?? Kh8+/– 18.Bd3 g6?? 19.Bb5+– Kg7 20.Bc6 Bc6 21.Qc6 Qe7 22.Qc7 Qe6 23.Qc6 Qf5 24.Ne5 Rh8 25.Qd5 Raf8 26.Qf3 Qg5 27.Rc7 Be5 28.de5 Rh4 29.e6 Kh6 30.Rf7 Re8 31.Bg7 Kh7 32.Bf6 Kh6 33.Bg5 Kg5 34.Qf6 Kh5 35.Rh7 1–0. vihavald (1730) – agimbossi, kurnik, 2011.

3.Qg4 Bf8 4.Nf3 Nf6 5.Qg5 h6 6.Qh4 Be7 7.Bb2 0-0 8.Qg3 d6–/+ 9.Bd3 e5 10.Nh4 Bg4 11.Nc3 Qd7–/+ 12.Bb5 Nc6 13.Bc4?? Nh5–+ 14.Ne4 Ng3 15.hg3 d5 16.f3 Be6 17.0-0-0 dc4 18.g4 Rad8 19.f4 Bg4 20.Rdf1 f5 21.Ng6 Rf7 22.Ng3 Qd2 23.Kb1 Nb4 24.fe5 Qc2 (25.Ka1 c3 26.Rb1 Qa4 27.Ne7 Re7 28.a3 Nc2 29.Ka2 Qc4#) 0–1. UncleStooge – shooin, Caissa.com, 2004.

3.Bb2 de4 4.Nc3 Nf6 5.Qe2 Bb4 6.Ne4 Nbd7?? 7.Nf6=+ gf6 8.Nf3 b6?? 9.a3?? Be7 10.Qb5 a5 11.Bd3 Ba6 12.Qc6 Bd3 13.cd3 0-0 14.h4 Nc5 15.d4 Nd3 16.Ke2 Nb2 17.g4?? Qd5 18.Qc2 Nc4 19.g5 Nd6 20.d3 Nf5 21.Rag1 fg5 22.Qd2 Nd4 23.Nd4 Qd4 24.Rg5 Bg5 25.Qg5 Qg7 26.Qc1 Qe5 27.Kf1 Kh8 28.h5 Rg8 29.h6 Rg5 30.f4 Rf5 31.Rh4 Rg8 32.Qd2 Qd4 33.Qf2 Qd3 34.Ke1 Rb5 (34...Rb5 35.Qd4 Qd4 36.Rg4 Qe3 37.Kf1 Rg4 38.f5 Rf5) 0–1. nizinna – kallekusta (1765), kurnik, 2011.

3.ed5+= ed5 4.Bb2 Nf6–/+ 5.a3 Bd6 (5...a5 6.b5+=) 6.Nf3+= 0-0 7.Be2 a5 8.ba5 (8.b5 Re8+=) 8...Re8 9.0-0 Ra5 10.Bc3 Ra8 11.d3 c5 12.Nbd2 Nc6 Black plans d4 13.a4 (13.Re1 Bd7–/+) 13...b6 (13...Bd7 14.Re1–+) 14.Re1–/+ h6 15.Nf1 (15.d4 Ra7–/+) 15...d4 16.Bd2 Nd5 17.Ng3 Bf4 (17...f5 18.Qb1–/+) 18.Bf4 Nf4 19.Nd2 Ne2 20.Re2 Be6 21.Nde4 (21.Nc4 Bc4 22.dc4 Qd7–/+) 21...Nb4 22.Nh5 Nd5 23.Re1 f5 24.Nd2 Qg5 25.Qf3?? (better is 25.Ng3–/+) 25...Bf7–+ (25...Qd2?! 26.Re6 Re6 27.Qd5–+) 26.Ng3 (26.Re8 Re8 27.Ng7 Kg7–+) 26...Qd2 27.Re8 (27.Red1 Qf4 28.Qf4 Nf4 29.Nf5 Re2–+) 27...Re8 28.Qf5 (28.h4 Re5 29.Qd1 Qd1 30.Rd1–+) 28...Re1 29.Re1 Qe1 30.Nf1 Be6 (30...Nc3 31.g3 Be6 32.Qh5–+) 31.Qh5 (31.Qe4 Qe4 32.de4–+) 31...Nf4 (31...Nf4 32.Qf3 Ne2 33.Qe2 Qe2–+) 0–1. Touchefeu,Aurelien (1960) – Aubry,Yannis (2255), Rennes FRA, 7th d'Ille et Vilaine Open, 2014. (=1.e4 e6 2.b4??)

3.ed5+= ed5 4.b5!?+=.

3.ed5 ed5 4.Qe2 Qe7 5.Nc3 d4 6.Nb5 Nc6?? 7.Nc7+– Kd7 8.Na8 Qb4 9.Qd3 Nf6 10.Ne2 Bc5 11.c3 Qa5 12.Qg3 dc3 13.Nc3 Re8 14.Be2 Bd6 15.Qg7 (15…Qh5 16.d4+–) 1–0. Trkn – guest374, ICC, 2004.

3.Nf3 b6 4.a3 Bc5 (4...Be7 5.e4–/+) 5.d4+= Bd6 6.e4 Bb7 7.Nc3 Ne7?? (better is 7...Nh6+=) 8.e5+– Bf3 9.Qf3 Nf5?? (better is 9...Nbc6 10.ed6 Nd4+–) 10.Qa8 (10.ed6?! Nd4 11.Qa8 Nc2 12.Kd1 Na1+–) 10...Qh4 (10...Nd4 11.Bd3 Bc5+–) 11.g3 Qg4 (11...Qd8 12.ed6 cd6+–) 12.Be2 (12.ed6 Nd6 13.Be2 0-0 14.Bg4 Nc6 15.Qf8 Kf8+–) 12...Qh3 13.Qb8 Ke7 14.Qh8 Be5 15.fe5 Nd4 16.Bg5 f6 17.Qg7 Kd8 (17...Ke8 18.Qg8 Ke7 19.Bf6) 18.Qf8# 1–0. pierre – oppotoaze, internet, 2010.

3.Nf3 d5 4.Bb2 f6 5.Nc3 a6 6.a3 Bc5 7.d4 Bd6 8.Qd2 Nc6 9.e4=+ de4 10.Ne4 Be7 11.Bc4= b5 12.Bb3 Bb7 13.Be6+= Nh6 14.d5+/– Na7 15.0-0 c6?? 16.d6+– Bf8 17.d7 Qd7 18.Qd7# 1–0. pierre – vipexiq, internet, 2009.

3.Nf3 Nf6 4.Nc3 Bc3–+ 5.dc3 d5 6.e3 a6 7.Bd3–/+ Nc6 8.0-0 0-0 9.Ba3 Re8 10.Ne5 Ne5 11.fe5+/– Ne4 12.Be4 de4 13.Qh5 g6 14.Qh6+– Qd5 15.Rf7!! (15...Qd1 16.Rd1 Kf7 17.Qh7#) 1–0. marre – oppo, internet, 2010.

3.Bb2 Bf8–/+.

3.Nf3 Nf6 4.g5 Ne4 5.c3 Ba5?? 6.Qa4+= Nf2 7.Kf2 Bb6 8.Ke1 Nc6 9.Na3 d5 10.Ne5 Bd7 11.Qf4 Qe7 12.Nb5?? a6?? 13.Qf7 Qf7–+ 14.Nf7 Kf7 15.Nd4 Nd4 16.cd4 Bd4 17.Rb1 b5 18.e3 Be5 19.Bd3 g6 20.Rf1 Kg7 21.h4 Rhf8 22.Ba3 Bg3 23.Kd1 Rf1 24.Bf1 Bh4 25.Be7 Bg3 26.Bd3 Be5 27.Bf6 Bf6 28.gf6 Kf6 29.Ra1 c5 30.Be2 e5 31.Rb1 h5 32.Bf3 e4 33.Bg2 Re8 34.Ke2 Bg4 35.Ke1 Re5 36.a4 b4 37.Bf1 a5 38.Bb5 c4 39.d3 ed3 40.Kd2 Rf5 41.Re1 Rf2 42.Kc1 d2 (42...d2 43.Kc2 de1Q#) 0–1. jimmyjazz – divergence (1630), internet, 2007.

3.Bg2 d5 4.c3 Be7 5.Qa4 Bd7 6.Qb3 Bc6 7.Ba3 Nf6 8.h3 0-0 9.Nf3 Ba3 10.Qa3 Nbd7 11.d4 Re8 12.0-0 e5 13.Nbd2 e4 14.Ng5? h6 15.Nf7 Kf7 16.Nb3 Kg8 17.g5 hg5 18.f3 ef3 19.Bf3 Ne4 20.Be4 de4 21.Nc5 Nc5 22.Qc5 Qe7 23.Qf5 Rf8 24.Qa5 Rf1 25.Kf1 Rf8 26.Ke1 a6 27.d5 Bb5 28.a4 Bc4 29.Rb1 Qf7 30.Rb7 Qf1 31.Kd2 Qe2 32.Kc1 0–1. ulven – RABALA, Caissa.com, 2005.

3.b5 c5 4.c4 (4.e4 d5 5.e5 Ne7=) 4...b6 5.e3 d5 6.Bb2 Bb7 7.Nf3 f6 (7...Nf6 8.d4=) 8.Be2 e5 9.d4 e4 10.Nfd2 f5 11.dc5 bc5 12.cd5 Nf6 13.Nc3 Nd5 14.Bc4 (14.0-0 Nb6+/–) 14...Nb6 15.Ba2 Qg5 16.0-0 N8d7 17.Qb3 0-0-0 (17...Qg6!?+/–) 18.Nc4 Be7? (better is 18...Nc4!? 19.Qc4 Bd6+/–) 19.Na5+– f4 (19...h5 20.Qc2 h4 21.Nb7+–) 20.ef4 Qf4 21.Nb7 Kb7 22.Nd5 Qg5 23.Ne7 Qe7 24.Qe3 (24.a4!? Ra8 25.Bb1 e3+–) 24...Nf6 25.Rac1 Rd3 26.Qe2 (26.Qc5?! Qc5 27.Rc5 Na4+/–) 26...Rhd8 27.Rfd1 Na4 28.Bf6 gf6 29.Bb1?? Nc3 30.Bd3+= Ne2 31.Be2 e3 32.Rd8+= ef2 33.Kf2 Qd8 34.Rc4 Kb6 35.Ra4 Qd2 36.g4 h5? 37.gh5+/– Qg5 38.h4 Qf5 39.Ke3 Qe5= 40.Kd2 Qb2 41.Ke1 Qb1 42.Kf2 Qf5 43.Ke3 Qe5= 44.Re4 Qg3 45.Kd2 f5 46.Re6 Kb7+= 47.Re3 Qh4 48.Rc3 Kb6 49.Kc2 f4 50.Rd3 c4 51.Rc3 Qf2 52.Kd1 Qd4 53.Kc2 Qf2 54.Kd1 Qd4 55.Kc2 Qf2 ½–½. Schott,Detlef (1875) – Scharrenbroich,Andreas (1835), Niederrhein–ch, 2005.

3.b5 Bc5 4.d4+= Be7 5.e4 d5 6.e5 c5 7.Qg4 g6 8.Nf3 cd4 9.Qd4 Nd7 10.Bd3 Bc5 11.Qf4 Ne7 12.0-0 b6 13.Nbd2 a4 14.Re1 Bb7 15.Bb2 Nf5 16.c4 Qe7 17.Red1 Ng7 18.cd5 Bd5 19.Ne4 0-0?? 20.Nf6+– Kh8 21.Qh6 Nf6 22.ef6 Qf6 23.Bf6 Rg8 24.Ng5 Bf2 1–0. guest1196 – guest669, ICC, 2003.

3.b5 d6 4.Bb2 (4.e4 Nf6 5.Nc3 Be7=) 4...Bd7 (4...Nf6 5.Nf3=) 5.e3 Nf6 6.Nf3 (6.Qf3 d5=) 6...d5 (6...Be7 7.Bc4=) 7.Bd3 (7.Be2 c6=) 7...c6 8.bc6 (8.a4 Bd6=) 8...bc6 (8...Nc6 9.Ne5=) 9.0-0 Na6 (9...Bd6 10.c4=) 10.Nc3 (10.c4 Bd6+=) 10...Nc5= 11.Be2 Qb8 (11...Bd6!?=) 12.Rb1+= Qc7 13.d4 Nce4 (13...Nb7 14.Bd3+=) 14.Ne4+/– Ne4 15.c4 Bd6 16.Bd3 (16.c5 Be7+/–) 16...c5 (16...0-0 17.c5 Be7 18.Qc2+/–) 17.cd5 ed5 18.dc5 Qc5? (18...Nc5 19.Be2 0-0 20.Qd5+/–) 19.Bg7 (19.Rc1!? Qb6 20.Be4 de4 21.Bg7 ef3 22.Qf3 Bh2 23.Kh1 Ra6 24.Kh2 Rg8 25.Qe4 Kd8 26.Qh7 Qb8 27.Kg1 Ke7 28.Qh4 Ke8+–) 19...Rg8 20.Be4 (20.Rc1 Qa3 21.Be4 de4+–) 20...de4+/– 21.Rc1 Qa3 (21...Qf5!? 22.Qd6 Rg7+–) 22.Qd5+– Rd8 23.Qe4 Be6 24.Qh7 Kd7 (24...f5 25.Ng5 Rg7 26.Qg7+–) 25.Ne5 Be5 26.Be5 Rg6 (26...Ke7 27.Rc7 Bd7 28.Rd7 Rd7 29.Qg8 Qc5+–) 27.Rfd1 Ke7 28.Qh4 (28.Qh4 f6 29.Qh7 Rg7 30.Qg7 Ke8 31.Qh8 Bg8 32.Qg8 Qf8 33.Qe6 Qe7 34.Rd8 Kd8 35.Rc8) 1–0. Wall,Bill – Guest6091, internet, 2005.

3.b5 Ke7 4.c4+/- Kd6? (4...Nf6!?+/-) 5.e3 (5.Nc3 Ke7+-) 5...Kc5 (5...Nf6 6.d4+-) 6.a4 (6.Nc3 Kd6+-) 6...Kb6 7.Bb2 c5 (7...Nf6 8.Bd4 Bc5 9.Bc5 Kc5 10.Qb3+-) 8.bc6! bc6 (8...Kc6 9.Qf3 Double attack; 8...bc6 9.Na3 Combination; 8...Nc6 9.Nf3 Combination; 8...dc6 9.Bd4 Pinning) 9.Be5 (9.Nc3 Ka7+-) 9...d6 (9...Na6 10.Nc3+-) 10.Bd4 (10.c5!? dc5 11.Nc3 Nd7 12.Rb1 Ka7+-) 10...c5 (10...Kc7 11.Nf3+/-) 11.Bb2 (11.Bc3 Kc7+/-) 11...Nc6 12.Nc3 d5? (12...Kc7!?+/-) 13.cd5 (13.Rb1!? Nb4+-) 13...ed5 14.Nb5 Nf6 15.Nf3 Nb4 (15...Kb7 16.Ne5 Ne5 17.Be5+-) 16.Be2 g5? (16...Kb7 17.0-0+-) 17.d3 (better 17.Be5!? Bf5 18.Bc7 Qc7 19.Nc7 Kc7+-) 17...Rg8 18.h3 (18.0-0 Qe7+-) 18...h5 (18...Bf5 19.Rc1+-) 19.Nd2 (19.Rc1!? Kb7+-) 19...g4 (better 19...Kb7+/-) 20.h4 (better 20.hg4 Bg4 21.Nf3+-) 20...g3+= 21.f3 Bh6 22.Nf1 (better 22.e4 Re8 23.Qc1+=) 22...d4?? (22...Qe7 23.e4=+) 23.e4?? (better 23.ed4 cd4 24.Bd4 Kb7 25.Nd2+=) 23...Be6=+ 24.Rc1 (24.Nd2 Bf4=) 24...Rc8 (24...Bc1 25.Bc1 Qb8 26.Bg5-/+) 25.Nd2 Nh7 (better 25...Nd7!? 26.Nd6 Ne5 27.Nc8 Qc8=+) 26.Rb1 (26.Nc4 Bc4 27.Rc4 Be3+=) 26...Nf8= 27.Nc4?? (better 27.Bc1=) 27...Bc4-+ 28.dc4 Ne6 (better 28...d3 29.Bd3 Nd3 30.Kf1 Nb2 31.Qd6 Qd6 32.Nd6 Rc7 33.Rb2 Ka6-+) 29.Bd3?? (better 29.Bc1 Bf4 30.Bf1-+) 29...Nf4-+ 30.Bf1 d3 31.Bc1 (31.Qb3 Nc2 32.Kd1 Ng2 33.Nd6 Kc6 34.Bd3 Nce3 35.Ke2-+) 31...Nc2 32.Kd2 Ng2 (32...Ne2 33.f4 Bf4) 33.Kc3-+ Nge3 34.Qd2 (34.Qd3 Qf6 35.Kb3-+) 34...Nd5!! 35.cd5 (35.cd5 Bd2 Discovered attack (35...Qf6 Decoy); 35.ed5 Bd2 Discovered attack (35...Qf6 Deflection)) 35...Bd2 36.Kd2 (36.Bd2 Qf6 37.Kd3 Nb4 38.Ke2 g2-+) 36...Nb4 (better 36...g2 37.Rg1 gf1N 38.Rf1-+) 37.Rb4 (37.Bg2 f5! 38.Ke1 Qf6-+) 37...ab4 (better 37...cb4 38.Bg2 Rc2 39.Kd3 Rg2 40.Be3 Kb7 41.Rc1-+) 38.Bg2 (38.Bd3 Qf6 39.Ke3 Ra8-+) 38...c4 (38...Ra8 39.Kd3 Ra4 40.Nd4 cd4 41.Bb2-+) 39.Bb2 f5! 40.Bc3 (40.ef5 c3 Double attack (40...Qd5 Deflection; 40...Qd7 Decoy)) 40...Ka5 (40...bc3 41.Nc3 Rb8 42.Nb5-+) 41.Bb4 (41.Bd4-+) 41...Kb4 42.Rc1 Kc5 (better 42...Qh4 43.Rb1 Kc5 44.Ke3-+) 43.Rc3 Qb6 44.Rd3 Qh6 (44...Qh6 45.Re3 fe4-+) 0-1. mysterychessplayer_x (2060) - Lance5500 (2485), lichess.org, 2019.

3.b5 Ne7 4.a4 Nd5 5.c4 Nf6 6.e3 d5 7.Nf3 Bd6 8.d4 c5 9.Bd3 0-0 10.0-0 b6 11.Bb2 Nbd7 12.Ne5 Bb7 13.Nd2 Qc7 14.f4 Rfd8 15.Kh1 Nf8 16.Rc1 Qe7 17.Qe2 Ng6 18.Ng6 fg6 19.Nf3 Ne4 20.Ne5 Qh4 21.Be4 de4 22.g3 Qe7 23.Rcd1 Rf8 24.dc5 Bc5 25.Rd7 Qd8 26.Rd8 Rad8 27.Rd1 Rd1 28.Qd1 Be3 29.Nc6 Bc5 30.Qd7 Bc8 31.Qg7 1–0. damarez (1825) – T_Challa010 (1680) , lichess.org, 2019.

3.c3 c5 4.e3 (4.bc5 Bc5 5.d4 Be7+=) 4...b6 (4...ab4 5.cb4 cb4 6.a4+=) 5.Nf3 (5.bc5 bc5 6.Nf3 d5=) 5...Bb7 (5...ab4 6.cb4 cb4 7.Be2+=) 6.Be2 (6.bc5!? bc5 7.d4=) 6...ab4+= 7.cb4 cb4 8.a4 g6 9.d3 Bg7 10.d4 Nf6 11.0-0 0-0 12.Bd3 Na6 13.Re1 d5 14.Nbd2 Ne4 15.Be4 (better is 15.Bb2!?+=) 15...de4–+ 16.Ne5 Be5 17.de5 Nc5 18.Nc4 (18.Rb1 Ra4 19.Bb2 b5–+) 18...Nd3 19.Re2 Bd5 20.Nd2 (20.Nb2 Qg5 21.Rd2 Ne5 22.Kh1–+) 20...b5 21.a5 Bc4 (21...Ra5 22.Rb1 Ba2 23.Ra1–+) 22.Nc4 (better is 22.Ne4 Nc1 23.Rd2 Ne2 24.Kh1–+) 22...bc4 23.Bd2 (23.a6–+) 23...Ra5 24.Ra5 Qa5 25.g3 (25.f4 Ra8 26.Qf1 Qa1–+) 25...c3 26.Bc1 (26.Be1 Rb8 27.Rc2 Rc8–+) 26...Rb8 27.Kg2 (27.Re1 b3 28.Rf1 c2–+) 27...b3 28.h3 (28.Qf1 Qa1 29.Bb2 cb2 30.Rb2 Qb2–+) 28...c2 29.Qd2 Qd2 30.Rd2 Nc1 31.h4 Nd3 White resigned (31...Nd3 32.g4 c1Q 33.Rd3 ed3 34.g5 d2 35.Kh2 d1Q 36.Kg3 Qg1 37.Kf3 Qcd1 38.Ke4 Rb4) 0–1. pieeater – AsceticKingK9, ChessWorld.net, 2012.

3.c3 g6 4.Bb2 Bg7 5.d4 d5 6.e3 c6 7.Nf3 Ne7 8.Bd3 b6 9.0-0 0-0 10.Nbd2 Ba6 11.Nb3 a4 12.Ba6 Na6 13.Nbd2 b5 14.Re1 Re8 15.e4 de4 16.Ne4 Nd5 17.Qd3 Nf4 18.Qe3 e5 19.de5 Nd5 20.Qd4 Nf4 21.Rad1 Qd4 22.cd4 Nc7 23.Nf6 Bf6 24.ef6 Rad8 25.Ne5 Re6 26.g3 Nfd5 27.Rc1 Rdd6 28.Ng4 Re1 29.Re1 Nf6 30.Nf6 Rf6 31.d5 Nd5 32.Bf6 Nf6 33.Rc1 1–0. pillsbury (2185) – eweram (2065), net–chess.com, 2014.

4.Bb2 Nc6 5.Nf3 Nf6 6.e3 d5 7.d3 Bd6=+ 8.Nbd2 Qe7 9.Nb3 Ra7 10.Be2 0-0 11.Nbd4 Nd4–/+ 12.Nd4 Bd7 13.Qc1 e5 14.Nb3 Rfa8 15.0-0 Ba3 16.Ba3 Ra3 17.Rb1 Ra2 18.d4 Ne4 19.Bd3 Nc3 20.Rb2? e4 21.Ra2 Na2 22.Qb2 ed3 23.cd3 Qb4 24.Ra1 Ra3 25.h3 Rb3 26.Qa2 h6 27.Qa8 Kh7 28.Qd8 Qc3 29.Rf1 Be6 30.g4 Qc2 0–1. funkade (2575) – fifteenminutesofgame (2400), net–chess.com, 2004.

4.Bb2 f6 5.e3 e5 6.Be2 (6.d4 ed4 7.Bd4 Ne7=) 6...Ne7 7.c4 Ng6 (7...d5 8.Bc3 Ra7 9.d4=) 8.Nc3 d6 9.Nd5 (9.Nf3 Nc6=) 9...Be6 10.f4 (10.Nf3 c6 11.Nc3 d5 12.cd5 cd5=) 10...Bd5 (10...c6!? 11.Nb4 ef4–/+) 11.cd5+= Rd5 (11...ef4 12.Nh3+=) 12.fe5 (12.Qb3 Rc5+=) 12...Ne5 (12...de5!? 13.Nf3 Nd7+=) 13.Nf3 (13.Qb3 Ra5 14.Qb7+=) 13...Ng6 (13...Qe7 14.0-0=) 14.0-0 (14.Qb3 Rc5+/–) 14...Be7 (14...c6 15.Qb3 Qe7 16.Rfb1+=) 15.Nd4 (better is 15.Qb3 Ra5 16.Qb7+/–) 15...c5? (better is 15...Qc8!?+=) 16.Bc4 (better is 16.Bb5 Nd7 17.Ne6+–) 16...Rh5?? (better is 16...Rd4 17.ed4 Nc6+–) 17.Ne6 (worse is 17.Qh5 cd4 18.Bd3 0-0+–) 17...Qb6 18.Ng7 Kd7 (18...Kd8 19.Rb1 Rh4 20.Bf6+–) 19.Nh5 Qb2 20.Rb1 Qe5 21.Qa4 Kc7 22.Ng7 (22.Qb3!? b5 23.Qb5 Rc8+–) 22...d5 23.Bb5 (23.Rf5 dc4 24.Re5 Ne5+–) 23...f5 (23...Bd6 24.Qa5 Kc8+–) 24.Be8 Qg7 25.Qa5 Kd6?? (25...Kc8 26.Qb6 Bf8 27.Qe6 Nd7 28.Qd5+/–) 26.Rb6 (better is 26.Rb7 d4 27.Qc7 Kd5 28.Rb8 Re8 29.Re8+–) 26...Ke5?? (better is 26...Nc6 27.Bc6 bc6+=) 27.d4! cd4 28.ed4 Ke4 29.Re1 (29.Qe1 Kd3 30.Rf3 Kd4 31.Qf2 Ke5 32.Qe3) 29...Kf4+– 30.Rf1 Kg4?? (30...Ke4 31.Qe1 Kd3 32.Rf3 Kd4 33.Qf2 Ke5 34.Qe3) 31.Bg6?? (better is 31.Qd5 Rf8 32.Rb7+–) 31...Qd4= 32.Kh1 hg6 33.h3 (better is 33.Rg6 Kh5 34.Re6+=) 33...Kh5–+ 34.Qb4?? (better is 34.Rb7 Bd6 35.Rfb1–+) 34...Bb4 35.Rb4 Qd3 (better is 35...Qa7 36.Rb5–+) 36.Rff4 (36.Rf3 Qd1 37.Kh2 Nc6–+) 36...Qa3 37.g4 fg4 (37...Kg5 38.Kg1 Rh3 39.Rf3 Qf3 40.gf5 Rh1) 38.Rg4 Nc6 (better is 38...Qh3 39.Kg1 g5 40.Rg2 Qe3 41.Rf2 Qe1 42.Kg2 Qb4 43.Re2–+) 39.Rh4 Kg5 40.Rbg4 Kf5 41.Rf4 Ke5 42.Ra4 Qf3 43.Kh2 Qf2 44.Kh1 Rh4 45.Rh4 Qh4 (45...Qh4 46.Kh2 Kf4 47.Kh1 Qf2 48.h4 Kf3 49.h5 Qg2) 0–1. Nautiluschess – patc, ICS blitz, 2001.

4.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 a5 4.ba5 Ra5).

4.e3 Qf6 5.d4 c5 6.Bd2 (6.Bb2 d5+=) 6...Ra8 (6...cd4 7.Nf3 de3 8.Bc3 ef2 9.Kf2+=) 7.Bc3 d5 8.dc5 Qd8 9.Nf3 Nf6 10.Bd3 Bc5 11.Nbd2 Ra3 (worse is 11...Ba3 12.Bb4 Bb4 13.Ra8+=) 12.Ra3 Ba3 13.0-0 Nc6 14.Qa1 Bd6 15.e4 de4 (better is 15...Be7!?+=) 16.Ne4+= Ne4 17.Bg7 Rg8 18.Be4 f5 19.Bc6 bc6 20.Be5 Be5 21.Qe5 Qd5 22.Qb8 Kf7 23.Qa7 Bd7 24.Re1 Qf3?? (better is 24...Ke7 25.Qe3 Ke8+/–) 25.Qd7+– Kf8 26.Qd6 (26.Qd6 Kg7 27.gf3 Kh6 28.Kf1+–) 1–0. orane (2175) – rayban2 (1655), Live Game Caissa's Web, 2004.

4.c4 Na5 5.Nc3 Nc4–/+ 6.d3 Nb6 7.Rb1 Ba3–+ 8.Be3 Nf6 9.Rb3 d5 (9...d5 10.Nb5 Be7–+) 0–1. cristianj – ajochem (2305), net–chess.com, 2008.

4.d4 f5 5.Nf3 Nf6 6.e3 Na5 7.Nc3 b6 8.d5 Bd6 9.Nb5 Nd5 (worse is 9...ed5 10.Nd6 cd6 11.Rb1+/–) 10.Nd6 cd6 11.Bb2 (11.c4 Qf6 12.Rb1 Nc3+=) 11...Qe7 (11...Ba6 12.Ba6 Ra6 13.Qd3=) 12.Rb1= Bb7 13.c4 Nf6 14.Bd4 Bf3 15.Qf3 0-0 (15...Nc6 16.Rb3+=) 16.Rb6= d5 17.cd5 Nd5 18.Rb1 Rfb8 19.Rb5 Nb3 (19...Nb3 20.Bb2 Rb5 21.Bb5 Rb8–/+) 0–1. marekt – calbag, ChessWorld.net, 2013.

4.e4 Qh4 5.Nc3 Bc5 6.Nh3 Bd4 7.Bb2 Nf6 8.Bd3 Ne5?? 9.Qe2?? Ra5=+ 10.Ra2 0-0 11.a4 d5 12.Rf1? Nd3 13.Qd3 e5 14.ed5 Nd5 15.Ne4?? Nb4 16.Qb3 Qe4 17.Kd1 Qg2 18.Re1 Na2 19.Qa2 Bh3 20.Bd4 ed4 21.Qb2 Re5! (21...Re5 22.c4 Qf3 23.Re2 Qe2 24.Kc2 Qc4 25.Kb1 Re1 26.Qc1 Qc1 27.Ka2 Be6#) 0–1. Steve20 – smoothmovermovesagain, ChessWorld.net, 2006.

4.Nf3 Ra5 5.Bb2 Rb5 (5...Nf6 6.e3+=) 6.Bc3 Rb6 7.e3 Nd7 8.a4 Rd6 9.d4 Ngf6 10.Bb4 Rb6 11.Bf8 Nf8 12.a5 Rb2? (better is 12...Rd6+=) 13.Qc1+– Rb4 14.c3 Rb1 15.Qb1 Ng6 16.Bb5 Nd7 17.Qb4 c6 18.Bd3 e5 (18...Qc7 19.c4+–) 19.Bg6 hg6 20.de5 Rh5 21.e6! fe6 22.0-0 Nf6 23.Qb1 Ne4 24.c4! Qc7 (24...dc4 25.Qc2 Double attack (25.Qe4 Deflection; 25.Qc2 Decoy)) 25.Rd1 Rf5 (25...g5 26.h3+–) 26.Qc2 Ke7 (26...g5 27.h3+–) 27.Rd4 Bd7 (27...Ke8 28.h3+–) 28.cd5 (28.cd5 ed5 29.Nh4+–) 1–0. bambinik – ChessTiger14.0, internet, 2001.

4.ab4 Ra1 5.Ba1 Nf6 6.c3 d5 7.d4 Bd6 8.Bb2 Qe7 9.Bc1 Nbd7 10.e3 e5 11.Nf3 e4 12.Nfd2 0-0 13.Be2 Nb6 14.Na3 Bd7 15.Nb5 Bb5 16.Bb5 c6 17.Be2 Ra8 18.0-0 Na4 19.Qc2 h5 (19...Qc7 20.g3=+) 20.Nb3 (20.f3 ef3 21.Rf3 b5=) 20...h4 21.Nc5 Nc5 (21...b5!?=+) 22.bc5= Bc7 23.g3 Qe6 24.f3? (better 24.c4=) 24...hg3-+ 25.f4 gh2 (25...Qh3 26.hg3 Qg3 27.Kh1-+) 26.Kh2 Qf5 27.Rg1 Qh7 28.Kg2 Kf8 (28...b5 29.cb6 Bb6 30.Qb3-/+) 29.Qb3 Ra7 30.c4 Ke7 31.cd5 Nd5 32.Bc4 Qh5 33.Bd5 (33.Qd1 Qd1 34.Rd1 Ra4-/+) 33...Qf3 (33...cd5 34.Qc2 Qf3 35.Kh2-+) 34.Kh2 cd5 35.Qd5 Ra2?? (better 35...Ra6 36.Qg5 Ke8-+) 36.Qa2+- Bf4 (36...Qh5 37.Kg3 Qf3 38.Kh4 Bd8+-) 37.ef4 e3 (37...Qh5 38.Kg3 Qf3 39.Kh4+-) 38.Qg2 (38.Rg3 Qf4 39.Be3 Qh4 40.Rh3 Qg4+-) 38...Qh5 (38...Qf4 39.Qg3 Qh6 40.Qh3 Qh3 41.Kh3+-) 39.Qh3 Qe2 (39...Qh3 40.Kh3 e2 41.d5+-) 40.Rg2 Qd1 41.Qe3 Kd7 42.f5 (better 42.Re2 Qe2 43.Qe2 Kc6 44.Qe4 Kc7+-) 42…Qh5 1-0. black_bishop_88 (2435) - EvgenijKuzmenko (2405), lichess.org, 2020. (=1.a3 e6 2.b4 a5 3.Bb2 ab4)

4.ab4 Ra1 5.Ba1 Nf6 6.Bf6 Qf6 7.c3 c5 (7...d5 8.d4=+) 8.bc5= Bc5 9.d4 Bb6 10.e4 d5 11.e5 Qe7 12.Nf3 0-0 13.Bd3 Bd7 14.0-0 Nc6 15.Nbd2 Ra8 (15...Ba5 16.Qc2 Rc8 17.Ra1+=) 16.Qb1 (16.Bh7 Kh8 17.Bb1 Ra6+/-) 16...Qd8 (better 16...Ba5!?+=) 17.Bh7+- Kh8 18.Bc2 Ra3 19.Qb2 Ra6 (19...Ra7 20.c4+-) 20.Bd3 (20.Rb1 Bc7+-) 20...Ra4 (20...Ra7 21.Rc1+-) 21.Bb1 (21.Rb1!? Bc7+-) 21...Qa8?? (better 21...Ra7+/-) 22.Qb6+- 1-0. black_bishop_88 (2555) - ehrlichroy (2560), lichess.org, 2020. (=1.a3 e6 2.b4 a5)

4.ab4 Nf6?? 5.Ra8+– Na6 6.b5 Nc5 7.c4 Be7 8.d4 Nce4 9.Qc2 Bb4 10.Bc3 Nc3 11.Nc3 Ne4 12.Qe4 Bc3 (12...Bc3 13.Kd1 0-0+–). hooks – bcholy, ChessWorld.net, 2005.

4.Nf3 ba3 5.Na3 d5 6.e3 Nf6 7.Be2 Be7 8.Rg1 (8.Nb5 Na6=+) 8...0-0-/+ 9.g4 c5 10.g5 Ne4 11.h4 Nc6 12.d3 Nd6 13.h5 d4 14.Kf1 (14.h6 g6-/+) 14...Nf5 (14...e5 15.h6 g6 16.c3-+) 15.e4-/+ Nd6 16.e5 Nf5 17.h6 g6 18.Nc4 Ra1 19.Ba1 b5 20.Ncd2 Qc7 21.Ne4 (better 21.c3-+) 21...Ne5 22.Qd2 Nf3 23.Bf3 Bb7 24.c3 Be4 (24...Rb8 25.Bb2-+) 25.de4 Nh4 (25...dc3 26.Bc3 Rd8 27.Qe2-+) 26.Bg4 (26.Be2 Qa5 27.Bb2 f6-+) 26...e5 27.Bb2 (27.cd4 ed4 28.Rh1 Qd8-+) 27...Qd8 (better 27...Qc6 28.Qc2 Rd8-+) 28.Bh3? (28.Be2 f5 29.gf6 Rf6-+) 28...f5 (28...Nf3 29.Qd3 dc3 30.Qf3 cb2 31.Kg2-+) 29.Rh1 (29.gf6 Bd6 30.Rg3 Qf6 31.Bg4-+) 29...Nf3 (29...fe4 30.Qe2 e3 31.Be6 Kh8 32.Rh4 Rf2 33.Qf2 ef2 34.Rh3-+) 30.Qe2 fe4 31.Be6 (31.Qb5 Ng5 32.Bg4 e3-+) 31...Kh8 32.cd4 cd4 (32...ed4 33.Bg4 Ng5 34.Qb5-+) 33.Qe4 (33.Qb5 Qd6 34.Qd7-+) 33…Nd2 (33...Nd2 34.Kg1 Ne4-+) 0-1. TwelveTeen (2650) - Taipei101 (2500), lichess.org, 2018.

(--> 1.b4 e6 2.Bb2 Nf6 3.a3 a5).

4.b5 d5 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5).

4.Bb2 c6 5.bc6 dc6 6.e3 Nf6 7.Nf3 Bd6 8.d4 Nbd7 9.Bd3 Qc7 10.Nbd2 0-0 11.c4 b6 12.h3 Re8 13.0-0 Bb7 14.Qc2 e5 15.de5 Ne5 16.Ne5 Be5 17.Be5 Qe5 18.Nf3 Qh5 19.Rab1 c5 20.Be2 (better is 20.Qe2!? Nd7 21.Rfd1=) 20...Be4–/+ 21.Qc3 (21.Qb2 Bb1 22.Qb1 Ne4–/+) 21...Bb1 22.Rb1 Rab8 23.Qc2 Qg6 24.Bd3 Ne4 25.Qa4 Nc3?? (25...f5!? 26.Qc2 Rbd8–/+) 26.Bg6?? (better is 26.Qe8! Re8 27.Bg6 Nb1 28.Bb1+–) 26...Na4+= 27.Bd3 Red8 28.Bf1 (28.Bc2 Ra8+=) 28...Nc3 29.Rc1 (29.Rb3 Na2+=) 29...Ne4–/+ 30.Ne5 (30.Rb1 Rd6–/+) 30...Ra8 31.Ra1 (31.Bd3!? Nd2 32.Rc3–/+) 31...Rd2–+ 32.Nd3 Nc3 33.f3 Ra2 34.Ra2 Na2 35.Ne5 Ra3 36.Nd7 Rb3 37.Kf2 f6 38.e4 Kf7 0–1. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

4.Bb2 d5 5.e3=.

4.d3 Be7 5.c4 Bf6 6.d4 c5 7.Bb2 d5 8.e3= Ne7 9.Nf3 0-0 10.Nc3 cd4 11.ed4 dc4 12.Bc4 (12.Bc4 Nf5 13.Ne4=). nay (2215) – sagaz (2370), net–chess.com, 2007.

4.e4 d5 5.ed5 ed5 6.Nf3 Nf6 7.d4 Bd6 8.c4 dc4 9.Bc4 0-0 10.0-0 Bg4 11.h3 Bd7 (11...Bh5 12.Re1=) 12.Nc3+= c6 13.Be3 (13.Na4? cb5 14.Bf7 Rf7-+) 13...cb5 14.Nb5 Be7 15.Ne5 Bf5 16.g4 (16.Re1 Nbd7+=) 16...Bg6 (better 16...Be6!?=) 17.Ng6+/- hg6 18.Bf4 Nc6 19.d5 Na5 20.Ba2 Nb3? (better 20...g5 21.Be3 Qd7+/-) 21.Bb3+- ab3 22.d6 (22.Qb3?! Qd5 (worse 22...Nd5 23.Rfd1 Nf4 24.Rd8 Rfd8 25.Qf3+/-) 23.Rfb1 Bc5+=) 22...Bd6 (22...Ne4 23.de7 Qe7 24.Qb3+-) 23.Bd6 (23.Nd6?! Ra6+-; 23.Qd6?! Qd6 24.Nd6 Ra4+-) 23...Re8 24.Qb3 (24.Nc7 Ne4 25.Ne8 b2+-) 24...Ne4 25.Bb4 Qh4 (25...Qb6 26.a4 Rad8+-) 26.Nc7 Ng5 27.Kg2 (27.Na8? Nh3 28.Qh3 Qh3-+; 27.Ne8?! Nh3 28.Qh3 Qh3=) 27...Re4 (27...b5 28.Ne8 Re8 29.Rfe1+-) 28.Qg3 (better 28.Na8 Ne6 29.Bd6+-) 28...Qg3 29.Kg3 Rc8 (29...Rd8 30.Rad1 Red4 31.Rd4 Rd4 32.f3+-) 30.Nd5 Rcc4 31.Rfe1 Red4 32.Ne3 (32.Ne3 Rd3 33.Rac1+-) 1-0. kianas (2010) - DodgySac (2060), ChessWorld.net, 2013.

4.a4 Bb7 5.f3 Bc5 6.d4? (better is 6.Bb2!? Nf6 7.d4=) 6...Qh4–/+ 7.g3 Qd4 8.Qd4 Bd4 9.c3 Be5 10.Bf4 Bf4 11.gf4 Nf6 12.e4? (12.Nh3 d6–+) 12...d6 (better is 12...Ne4 13.Ne2 Nf6–+) 13.Bd3 Nbd7 14.Ne2 Nc5 15.Bc4? (better is 15.Bc2!?–/+) 15...d5–+ 16.ed5 ed5 17.Ba2 Nd3 (17...0-0-0!? 18.Rg1 g6 19.f5–+) 18.Kd2 Nc5 19.Bb3?? (better is 19.Nd4–+) 19...Nb3 20.Kc2 (20.Kd3 Na1 21.Nd2 c6–+) 20...Na1 21.Kb2 0-0-0 (21...c5 22.Rg1–+) 22.Ka1 (22.Nd4 Rde8–+) 22...d4 (better is 22...c5!? 23.bc6 Bc6 24.Rg1–+) 23.Nd4 Nd5 24.Nf5 Nf4 25.Ng7 Bf3 26.Rf1 Rd3 27.Nf5 Ne2 28.Nh6 (28.Kb2 Rhd8–+) 28...Bd5 29.Nf7 Bf7 30.Rf7 Nc3 31.Nc3 Rc3 32.Kb2 Rh3 33.Rf2 Rd8 34.Kc2 (34.Rf4 Rd2 35.Kc1 Rdh2 36.Rf8 Kb7–+) 34...Rd4 35.Rf8 Kb7 36.Rf5 Ra4 37.Kb2 Rb4 38.Kc2 a4 39.Rf1 a3 40.Ra1 Rb2 41.Kc1 Rhh2 (41...Rbh2 42.Ra3 Ra3 43.Kb1 h6 44.Kc1 Ra1) 42.Ra3–+ Rb5 43.Ra4 Re5 44.Rd4 h5 45.Rd2 Rd2 46.Kd2 h4 47.Kd3 (47.Kc2 h3 48.Kc3 c5 49.Kb3 b5 50.Kc3 h2 51.Kc2 h1Q 52.Kd2 Qe1 53.Kc2 Re2 54.Kd3 Qd2) 47...h3 (47...c5 48.Kd2 h3 49.Kc3 b5 50.Kd3 h2 51.Kc2 h1Q 52.Kd2 Qe1 53.Kc2 Re2 54.Kd3 Qd2) 48.Kd4 (48.Kc3 c5 49.Kb2 h2 50.Kc2 h1Q 51.Kd2 Qd5 52.Kc2 Re2 53.Kc3 Qd4 54.Kb3 Qb4) 48...Re8 49.Kd5 (49.Kd3 h2 50.Kc2 h1Q 51.Kd2 Qg2 52.Kd3 Qf3 53.Kc4 Re4 54.Kb5 c6) 49...h2 50.Kc4 (50.Kd4 h1Q 51.Kc3 Qf3 52.Kc4 Re4 53.Kb5 c6) 50...h1Q 51.Kc3 (51.Kb4 Qf3 52.Kc4 Re4 53.Kb5 c6) 51...Qc1 (51...Qf3 52.Kc4 Re4 53.Kb5 c6) 52.Kd4 (52.Kb4 c5 53.Kb5 Qc3 54.Ka4 Qb4) 52...Qe3 (52...Re3 53.Kd5 Qc5) 53.Kc4 Re4 54.Kd5 Qd4 0–1. ChessNo1 – coolerdude, ChessWorld.net, 2005.

4.Bb2 Bb7 5.Nf3 Nf6 6.g3 (6.e3 d5=) 6...Be7 7.Bg2 0-0 8.0-0 d6 9.Ne1 (9.c4!?=) 9...Bg2=+ 10.Ng2 Nbd7 (10...d5 11.e3=+) 11.c4= Re8 12.d4 Bf8 (12...Rc8 13.Nc3=) 13.f3 (13.Nc3 Qc8=) 13...d5 14.Nd2 Rc8 15.Rc1 c6 16.bc6 Rc6 17.cd5 (17.Qa4 Qa8=) 17...Rc1=+ 18.Qc1 Nd5 (18...ed5 19.Re1=+) 19.e4= N5f6 20.Ne3 Qb8 21.Qa1 (21.Qc6 e5=) 21...Rc8 22.Rc1 b5 23.Rc8 Qc8 24.Qc1 Qc1 25.Bc1 Nb6 26.Nb3 a4 27.Nc5 Nfd7 28.Nd7 Nd7 29.Kf2 Nb6 30.Ke2 f6 31.Kd3 Kf7 32.Bb2 Ke8 33.Nd1 (33.Kc3 Bd6=) 33...Kd7 (better 33...Nc4!?-+) 34.Nc3 Kc6 35.Nd1? (better 35.Bc1!?=+) 35...Nc4-+ 36.Bc1 Ba3 37.Bf4 (37.Ba3 Na3 38.Nb2 g5-+) 37...Bd6 (37...g5 38.Bd2-+) 38.Bc1 (better 38.Bd6 Nd6 39.Nc3-+) 38...a3 39.Nc3 Nb2?? (better 39...Nb6-+) 40.Bb2=+ ab2 41.Kc2 b4 42.Na4 Kb5 (42...b1Q 43.Kb1 Kb5 44.Nb2=+) 43.Nb2= h5 44.Kb3 h4 (better 44...g5=) 45.Nc4?? (45.gh4 g6+=) 45...Bb8?? (better 45...Bg3 46.h3 g5-+) 46.gh4= Bh2 47.h5 Bg1? (47...Bf4 48.Nb2=) 48.d5?? (better 48.Nd6 Kc6 49.Ne8+-) 48...ed5+= 49.ed5 Bc5 50.d6 (better 50.Nd2=) 50...Kc6-/+ 51.Ka4 Bd6 52.Kb3 Kd5 53.Nd2 Ke5 54.Ne4? (better 54.Nc4 Ke6 55.Ne3-/+) 54...Be7-+ 55.Ng3 (55.Nd2 Kf4-+) 55...Kf4 56.h6 (56.Ne2 Kf3 57.Nd4 Kg4 58.Ne6 Kh5 59.Ng7 Kg4 60.Ne6-+) 56...gh6 (56...Kg3?? 57.hg7 f5 58.g8Q Kf3 59.Qe6+-) 57.Nh5 Kg5 58.Ng7 h5 59.Ne6 Kf5 60.Nd4 Kf4 61.Nc6 Bf8 62.Ne7 (62.Nd4 h4 63.Ne6 Kf3 64.Nf8-+) 62...Be7 63.Kc4 h4 64.Kd5 h3 65.Ke6 h2 66.Kf7 (66.Kd7 b3 67.Ke7 f5 68.Kd7 b2 69.Kc7 Kf3 70.Kb7 h1Q 71.Kc7 Qh2 72.Kd7 b1Q 73.Ke6 Qe4 74.Kf7 Qh7 75.Kf6 Qee7) 66…h1Q (66...h1Q 67.Ke7 b3 68.Kd7 b2 69.Kd6 b1Q 70.Kc6 Qhc1 71.Kd6 Qb7 72.Ke6 Qcc6; 66...b3 67.Ke6 b2 68.Ke7 b1Q 69.Kd7 Qb5 70.Ke7 Qe5 71.Kf7 h1Q 72.Kg6 Qe8 73.Kf6 Qh6) 0-1. black_bishop_88 (2480) - Chess_Gus (2425), lichess.org, 2020. (=1.a3 e6 2.b4 a5 3.b5 b6)

4.Bb2 c6 5.bc6 Nc6 6.e3 Ba6 7.Ba6 Ra6 8.Nf3 Nf6 9.0-0 d5 10.d4 Bd6 11.Qe2 Ra8 12.Nbd2 0-0 13.c4 dc4 14.Nc4 Bc7 15.Rfc1 Qd5 16.Qc2 Rac8 17.Qa4?? (17.a4 Nb4 18.Qb3 Rb8=) 17...Ne4?? (better is 17...b5 18.Qb3 bc4 19.Qc4 Ne7 20.Qd5 Ned5–+) 18.Nce5 Ne5 19.Ne5 Be5 20.de5 Nd2 21.Rd1 (21.Rc8 Rc8 22.Rd1 b5+=) 21...Qb3 (better is 21...Rc4!? 22.Qc4 Nf3 (22...Nc4?! 23.Rd5 ed5 24.Bd4+=; 22...Qc4?! 23.Rd2 b5 24.Rc1–/+) 23.gf3 Qc4–/+) 22.Qb3= Nb3 23.Rab1 Rc2 24.h3 (24.Bd4 Nd4 25.ed4 Rc3=) 24...Nc5 (better is 24...Nd2!? 25.Rdc1 Rfc8 26.Rc2 Rc2–/+) 25.Bd4= Ne4 26.f3 Ng3 (better is 26...Nc3!? 27.Bc3 Rc3=) 27.Kh2 Ne2 28.Bb6 Nc3 29.Rdc1 1–0. Fournier,Frederic – andy27, ICC, 2005.

4.c4 Bb7 5.Bb2 d5 6.e3 dc4 7.Bc4?? (better 7.Nf3=) 7...Bg2-+ 8.Nf3 (8.Bg7 Bg7 (8...Bh1?! 9.Bh8 Qh4 10.d4=) 9.Qg4 Bh1 10.Qg7 Qf6 11.Qf6 Nf6-+) 8...Bh1 9.Nc3 Qf6 (9...Nf6 10.d4-+) 10.Nd4 (10.Be2 Bd6-+) 10...Bc5 (10...Qh4 11.Rc1-+) 11.Nce2 Ne7 12.Qb3 (12.Ng3 Bd5 13.Bd5 ed5-+) 12...Qg6 (12...Qh6 13.Nc2-+) 13.0-0-0 Bb7 14.Nf4 Qh6 15.Nde6 fe6 16.Ne6 Nd7 (better 16...Qh2 17.Bg7 Rg8-+) 17.Nc7 (17.Ng7 Kd8 18.Ne6 Kc8 19.Bh8 Bf3-+) 17...Kd8-+ 18.Na8?? (better 18.Ne6 Kc8 19.Bg7-+) 18...Ba8 19.d4 (19.f4 Rf8-+) 19...Bd6 20.Be6 (20.d5 Qh2 21.Bg7 Rg8-+) 20...Qh2 21.Bd7 (21.d5 Qf2 22.Bg7 Re8-+) 21...Kd7 22.e4 (22.Rd2 Be4 23.Re2 Bf3-+) 22...Qf2 (22...Be4 23.Bc3 a4 24.Qa4 Qf2 25.Bd2 Ba3 26.Qa3 Rc8 27.Qc5 bc5 28.dc5 Rc5 29.Kb2 Rb5 30.Ka3 Qa7 31.Ba5 Bd5 32.Rd5 Nd5 33.Ka4 Qa5) 23.e5 (23.Qh3 Kd8 24.e5 Be4-+) 23...Qf4 (better 23...Be4 24.e6 Kd8 25.Rd2-+) 24.Kb1 Bc7 25.d5 (25.Qh3 Qf5 26.Qf5 Nf5-+) 25...Nd5 (better 25...Qe4 26.Qc2 Qc2 27.Kc2 Bd5 28.e6 Ke6 29.Bg7-+) 26.Rd5 Bd5 27.Qd5 Kc8 (better 27...Ke7 28.Qg2 g5 29.Qc6 Qf5 30.Ka1-+) 28.Qd4 (28.Qa8 Bb8 29.Qc6 Kd8 30.Qd5 Ke7 31.Qb7 Ke6 32.Qc6 Kf5 33.Qd7 Kg6 34.Qe6 Kh5 35.Qh3 Qh4 36.Qf5 Kh6 37.Bc1 g5 38.Qf6 Kh5 39.Qf3 Qg4 40.Qh1 Kg6 41.Qc6 Bd6 42.Qd6 Kh5 43.Qf6 Qe4 44.Ka1 Qd4 45.Kb1 Qd3 46.Ka1-+) 28...Qd4 29.Bd4 Re8 30.Kc2 Be5 (30...h5!? 31.Bf2-+) 31.Bb6 Re6 (better 31...a4!? 32.Kd3-+) 32.Ba5 Bf6 (32...h5 33.Be1-+) 33.a4 (33.Bd2 h5 34.Kd3 h4-+) 33...Re4 34.Kd3 (34.Kb3 h5 35.Bb6 h4-+) 34...Ra4 35.b6 (35.Be1-+) 35...Ra5 36.b7 Kb7 37.Ke4 Ra6 38.Kf5 Rb6 39.Kf4 Rc6 40.Kg4 Rc5 41.Kg3 ½-½. danishguy (2065) - dentistdentist90 (2085), Rated Bullet game, lichess.org, 2020.

4.e4 Bb7 5.Nc3 d5 6.ed5 ed5=.

4.Nf3 Bb7 5.e3 f5 (5...Nf6 6.Bb2=) 6.Bb2 Nf6 7.d4 (7.Be2 Bd6=) 7...Be7 8.Bd3 0-0 9.0-0 d6 (9...Ne4 10.c4=) 10.a4 (better is 10.c4=) 10...Nbd7 (better is 10...Ne4=) 11.Ng5+/– Bd5 (11...Qe8!? 12.Ne6 Qg6+/–) 12.c4+– h6? (better is 12...Ne4 13.cd5 Bg5 14.de6 Ndf6+–) 13.cd5 hg5 14.de6 Nb8 15.Bf5 Nd5 (15...d5+–) 1–0. Feng,Jason – Weiss,Frederic J_Marie, RL–2007–0-00106, 2007.

4.Bb2 b6 5.Nf3 Nf6 6.e3 Bb7 7.Be2 d5 8.0-0 Nbd7 9.c4 Qc7 10.cd5 ed5 11.d4 c4 12.a4 Bd6 13.Ne5 (better 13.Qc2!?=) 13...Ne5-/+ (13...Be5?! 14.de5 Ne5 15.Qd4=+) 14.de5 Be5 15.Be5 Qe5 16.Nd2 0-0 17.Nf3 Qf5 18.Qd4 Rfe8 (better 18...Nd7-/+) 19.Qb6+= Rab8 (better 19...Reb8!?+=) 20.Qa5+/- d4 (20...Ne4!?+/-) 21.Nd4+- Qg6 22.Bf3 Ne4 (22...Bf3 23.Nf3 Rec8 24.Rfc1+-) 23.Qc7 (23.Rfc1 Rec8+-) 23...Ba8 (23...Nd6 24.Bb7 Rb7 25.Qc6+-) 24.a5 (24.Qc4?! Nd2 25.Qe2 Bf3 26.Nf3 Nf1 27.Qf1 Qf6+-) 24...Rbc8 (24...Nd2 25.Ba8 Ra8 26.Rfc1+-) 25.Qf4 Nd2 26.Ba8 Nf1 (26...Ra8 27.Rfd1 c3 28.Rdc1+-) 27.Bc6 (27.Kf1?! Qd3 28.Kg1 Ra8+/-; 27.Rf1?! Ra8 28.a6 c3+/-) 27...Nd2 28.a6 (better 28.Be8 Re8 29.b6+-) 28...c3?? (28...Nb3 29.Nb3 cb3 30.Be8 b2=) 29.a7 (better 29.Be8!? c2 30.Nc2 Nb3+-) 29...c2 30.Nc2! Qc2 31.Be8?? (better 31.a8R Ra8 32.Ba8+-) 31…Qc1!! (31...Qc1 32.Rc1 Rc1) 0-1. black_bishop_88 (2525) - SantosBarrios (2495), lichess.org, 2020. (=1.a3 e6 2.b4 a5 3.b5 c5)

4.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 a5 4.b5 c5).

4.c4 b6 5.e3 d5 6.Bb2 Bb7 7.Nf3 f6 (7...Nf6 8.d4=) 8.Be2 e5 9.d4 e4 10.Nfd2 f5 11.dc5 bc5 12.cd5 Nf6 13.Nc3 Nd5 14.Bc4 (14.0-0 Nb6+/–) 14...Nb6 15.Ba2 Qg5 16.0-0 N8d7 17.Qb3 0-0-0 (17...Qg6!?+/–) 18.Nc4 Be7? (better is 18...Nc4!? 19.Qc4 Bd6+/–) 19.Na5+– f4 (19...h5 20.Qc2 h4 21.Nb7+–) 20.ef4 Qf4 21.Nb7 Kb7 22.Nd5 Qg5 23.Ne7 Qe7 24.Qe3 (24.a4!? Ra8 25.Bb1 e3+–) 24...Nf6 25.Rac1 Rd3 26.Qe2 (26.Qc5?! Qc5 27.Rc5 Na4+/–) 26...Rhd8 27.Rfd1 Na4 28.Bf6 gf6 29.Bb1?? Nc3 30.Bd3+= Ne2 31.Be2 e3 32.Rd8+= ef2 33.Kf2 Qd8 34.Rc4 Kb6 35.Ra4 Qd2 36.g4 h5? 37.gh5+/– Qg5 38.h4 Qf5 39.Ke3 Qe5= 40.Kd2 Qb2 41.Ke1 Qb1 42.Kf2 Qf5 43.Ke3 Qe5= 44.Re4 Qg3 45.Kd2 f5 46.Re6 Kb7+= 47.Re3 Qh4 48.Rc3 Kb6 49.Kc2 f4 50.Rd3 c4 51.Rc3 Qf2 52.Kd1 Qd4 53.Kc2 Qf2 54.Kd1 Qd4 55.Kc2 Qf2 ½–½. Schott,Detlef (1875) – Scharrenbroich,Andreas (1835), Niederrhein–ch, 2005.

4.e4 d5 5.e5 Ne7=.

4.a4 cb5 5.ab5 b6 6.Bb2 Bb7 7.e3 d5 8.Nf3 Nd7 9.Nd4 Rc8 10.Be2 Ngf6 (10...e5 11.Nf3 Qc7 12.Nc3=) 11.0-0 e5 12.Nf3 (12.Nf5 Qc7 13.Nc3 g6=) 12...e4 (12...Qc7!?=+) 13.Nd4= Be7 (13...Qc7 14.f4=) 14.Nc3 0-0 15.f3 Bc5 16.Na4 Re8 (16...Bd6 17.Nf5 Be5 18.d3=) 17.fe4 de4 18.c4 (18.Nc5 Rc5 19.Ba3 Rc7+=) 18...h6 (18...Bd6 19.Nf5 Bc7 20.Bd4=) 19.h3 (19.Nc5 Rc5 20.Nf5 Ne5+=) 19...Nh7 (19...Bd6 20.Nf5 Bc7 21.Qe1=) 20.Bg4 Nhf6 21.Bd7 (better 21.Nc6 Bc6 A) worse 22.Nc5 Ng4 (worse 22...bc5 23.Bf6 gf6 24.Bf5+-) 23.Qg4 Ne5=; B) 22.Bf6 Nf6 23.Bc8 Qc8 24.Nc5+-) 21...Qd7? (better 21...Nd7 22.Nc5 Rc5= (worse 22...bc5 23.Nf5 Ne5 24.Qh5+-)) 22.Nb3+- (22.Nc5?! Rc5 (22...bc5 23.Nf5 Re6 24.Ng7 Kg7 25.Qg4 Kh7 26.Rf6+-) 23.Nc2 Nh7=) 22...Nh7 (22...Qd6 23.Bf6 gf6 24.Qg4 Kf8 25.Nac5 bc5 26.Na5+-) 23.Nac5 (23.Nbc5!? bc5 24.Nb6 Qc7 25.Nc8 Bc8+-) 23...bc5+- 24.Na5 (better 24.Ra5 Ng5 25.Ra7+-) 24...Re6? (better 24...Ng5!?+-) 25.Qg4+- Threatening mate: Qxg7 (25.Nb7?! Qb7 26.Qg4 Rg6+-) 25...f6? (25...g5+-) 26.Nb7 Qe8 (26...Re7 27.Na5 Qg4 28.hg4 Ng5+-) 27.Ra7 h5 28.Qg3 (better 28.Qf5!? Rc7 29.Nd6 Rd6 30.Rc7 Nf8+-) 28...Qf8 29.Rf5 g5 (29...Re7 30.Rh5 Rb8 31.Qg6+-) 30.Rd5 (30.h4 Qe7+-) 30...Qe7 (30...Re7 31.Ba3 Rcc7 32.Rd8 Qd8 33.Nd8 Ra7 34.Nc6+-) 31.Nd6 Qa7 32.Nc8 Qa2 (32...Qb7 33.Rc5 Qf7+-) 33.Rd8 Nf8 34.Qc7 Qb1 (34...Qc4 35.b6 h4+-) 35.Kf2 Qb2 36.Qc5 (36.Ne7 Kg7 37.Nf5 Kg6 38.g4 hg4 39.hg4 Nd7 40.Rg8 Kh7 41.Rg7 Kh8 42.Qh2) 36...Re8 37.Re8 Qd2 38.Kg1 Kh7 39.Rf8 (39.Qf8?! Qe3 40.Kf1 Qc1 41.Ke2 Qc2 42.Ke1 Qc1 43.Kf2 Qd2 44.Kg1 Qe3 45.Kh2 Qf4 46.g3 Qf2 47.Kh1 Qf1 48.Kh2 Qf2 49.Kh1 Qf1 50.Kh2 Qf2=) 39...Qe1 40.Kh2 h4 (40...Kg7 41.Qe7 Kh6 42.Rf6) 1-0. petrobbo (2010) - w88lvo (1980), ChessWorld.net, 2014.

4.Nc3 cb5 (4...d5 5.e4=) 5.Nb5 Nc6 6.d4 d6 (6...Nf6 7.Bg5=) 7.e4 Bd7 8.Nf3 Nf6 9.Bd3 a4 (9...Rc8 10.Rb1+/–) 10.0-0 Be7 11.Bf4 Qb8 (11...Bc8!?+/–) 12.e5+– Nd5 13.ed6 Nf4 14.Nc7 (14.de7?! Ne7 15.Rb1 0-0+=) 14...Kd8 15.Na8 Bd6 (15...Qd6 16.Nb6+–) 16.Nb6 (16...Qc7 17.Nd7 Nd3 18.cd3 Kd7 19.d5 ed5 20.Qa4+–) 1–0. lucya (2130) – cagme_US (1900), GameColony.com, 2002.

4.e3 cb5 5.Bb5 Qg5 6.Bf1=.

4.e3 Qb6 5.Nc3+= Nf6 6.Rb1 (6.Nf3 d5+=) 6...Qc7 7.Nf3 (7.f4 Bc5+=) 7...cb5 (7...d5 8.Be2+=) 8.Nb5+/– Qd8 9.c4 Be7 10.Bb2 0-0 11.Qc2 Nc6 12.Bd3 d6 (better is 12...g6!?+/–) 13.Bf6+– Bf6 14.Bh7 Kh8 15.h4 g6 (better is 15...d5+–) 16.h5 Kh7 17.hg6 Kg7 18.Rh7 Kg8 19.Ng5! Bg5 (19...Bg5 20.gf7 Mate attack) 20.gf7 Rf7 21.Qg6 Kf8 (21...Rg7 22.Qg7) 22.Qf7 1–0. Marr33 (2130) – Hiro7 (1695), Rated game, 5m + 0s, 2010.

4.e3 d5 5.Bb2 Nf6 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4).

4.e3 d5 5.Bb2 Nf6 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 a5 6.b5).

4.e3 h5 5.Nc3 d5 6.f4 c5 7.Be2 c4 8.Nf3 Bd7 9.0-0 Bc5 10.d3 Ke7? (better is 10...Qb6 11.dc4 Be3 12.Kh1 Bc1 13.Qc1 dc4+/–) 11.dc4+– Qb6 12.Na4 Qa7 (12...Be3 13.Kh1 Qa7 14.Ne5+–) 13.Rb1 (13.Nd4 dc4 14.Bc4 Nf6+–) 13...Be3 14.Kh1 Bc5?? (14...dc4 15.Ne5 Bb6+–) 15.b6 Qa6 (15...Bb6 16.Nb6 d4+–) 16.Nc5 Ba4 17.cd5 Bc2 18.Qc2 Nf6 19.d6! Kd6 20.Ne4 Ne4 (20...Ke7 21.Qc5 Ke8 22.Nd6 Kf8 23.Nf5 Kg8 24.Qc8 Kh7 25.Ng5 Kg6 26.Ne7 Kh6 27.Qh8 Nh7 28.Qh7) 21.Qc7 Kd5 22.Rd1 Nd2 23.Rd2 Ke4 (23...Qd3 24.Rd3 Ke4 25.Qe5) 24.Qe5 1–0. marekt – Eries, ChessWorld.net, 2012.

4.e4 d5 5.e5 c5 6.Nf3 f6 7.Bb2 fe5 8.Ne5 Nf6 9.f3 (9.d4 Nbd7=) 9...Nbd7 10.Nd7 Bd7 11.Be5 Qb6 12.Nc3 Bd6 13.f4 0-0 14.Qe2 d4 (better is 14...a4!?+=) 15.Na4+= Qc7 16.Bd6 Qd6 17.Qe5 Qe5 18.fe5 Ng4 19.Nc5 Ne5 20.Nb7 Rab8 21.Na5 Bb5 22.Nb3 Bf1 23.Rf1 Nc6 (23...Nd3 24.cd3 Rb3 25.Rf8 Kf8 26.a4+/–) 24.Ke2+/– e5 25.Rfb1 e4 26.c3 e3 (26...dc3!? 27.dc3 Rbc8 28.Nd2+/–) 27.Nd4+– ed2?? (better is 27...Nd4 28.cd4 Rb1 29.Rb1 Rf2 30.Ke3 Rg2+–) 28.Nc6 Rbc8 (28...Rbe8 29.Kd2 Rf2 30.Kd3 Rg2+–) 29.Ne7 (29.Ne7 Kf7 30.Nc8 Rc8 31.Kd2 Rd8 32.Kc2+–) 1–0. kolya (2070) – Karlotta (1775), GameColony.com, 2002.

4.d4 Nf6 5.Nf3 Be7 6.e3 0-0 7.Bd3 c5 8.c3 (8.Nc3 Nbd7+=) 8...a4 9.0-0 c4 10.Bc2 Qa5 11.Qd2 Bd7 12.e4 Ne4 13.Be4 de4 14.Ne1 Qb5 15.Qf4 f5 16.Nd2 e5! 17.Rb1 (17.de5 Nc6 Decoy; 17.Qe5 Qe5 Combination) 17...ef4 18.Rb5 Bb5 19.Nc2 Nd7 20.Rd1 Nf6 21.Nb4 (21.Nb1 Nd5–+) 21...Bb4 22.cb4 c3 23.Nf1 g5 24.d5 Rfd8 25.d6 Ra6 26.Rd5 Nd5 0–1. ness75 – _chess_, gameknot.com, 2011.

4.d4 Nf6 5.Bf4 Bd6 6.Bd6 Qd6 7.Nf3 Nbd7 8.e3 0-0 9.c4 dc4 10.Bc4 c6 (10...c5 11.bc6 bc6 12.Nc3=) 11.Nc3 c5 12.0-0 b6 13.Na4 cd4 14.Nd4 Bb7? (better is 14...Ne5!? 15.Bb3 Bd7+=) 15.Ne6+– Qd1 16.Rfd1 Rfc8 17.Bb3 h6 (17...Rab8 18.Rd6+–) 18.Rd6 Rab8 19.Nd4 Nc5 (19...Ba8 20.Rd1+–) 20.Nb6 Nb3 (20...Rd8 21.Rd8 Rd8 22.Bc2+–) 21.Nb3 Rc2 22.Na5 Be4 (22...Ba8 23.Na8 Ra8 24.b6 Ra5 25.b7+–) 23.a4 Ne8 24.Rd4 Bf5 (24...Bg2 25.Nd7 Ra8 26.Kg2 Ra5 27.Rb1+–) 25.Nd5 Be6 26.Nc6 (26.Nc6 Rb7 27.Ndb4+–) 1–0. themonkey (2125) – saxe0 (1845), GameColony.com, 2002.

4.e3 c6 5.Bb2 Bd7N 6.bc6 (6.Nf3 cb5 7.Nc3 Qb6= 8.Rb1 b4 9.ab4 a4 10.Ba3 Nc6 11.Bb5 Ne5; 6.Nc3 A) 6...e5 7.Nf3 (7.bc6 bc6 8.Nf3 Bd6 9.Be2 Nf6 10.Rb1 0-0 11.0-0 Qe7; 7.Qh5 Bd6 8.Nf3 Qe7 9.bc6 bc6 10.Ne2 g6 11.Qh4 Qh4) 7...Bd6 8.bc6 bc6 9.Rb1 Nf6 10.Be2 0-0 11.0-0 Qe7; B) 6...Nf6 7.Nf3 Bd6 8.bc6 bc6 9.Rb1 0-0 10.Na4 c5 11.c4 Bc6) 6...Nc6 7.Nf3 (7.Nc3 Nf6 8.Nb5 Rc8 9.Nf3 Ne4 10.d3 Ng5 11.Rb1 Nf3; 7.Bb5 Nf6 8.Ne2 Bd6 9.f4 Rc8 10.0-0 0-0 11.Nbc3 Qb6) 7...Nf6 (7...Rc8 8.Be2 Nf6 9.0-0 Bd6 10.Nc3 e5 11.Nb5 Bg4) 8.d4 (8.Nc3 Rc8= (8...Be7 9.Bb5 0-0 10.0-0 Bd6 11.Be2 e5) 9.Be2 e5 10.0-0 e4 11.Ne1 Be6; 8.Ne5 Be7 9.Nd7 Qd7 10.Bb5 0-0 11.Nc3 Qc7) 8...Rb8 (8...Be7 9.c4= (9.Nbd2 0-0 10.Bd3 Rb8 11.0-0 b5) 9...Qb6 10.Qc2 0-0 11.Nbd2 Qc7; 8...Qb6 9.Ra2 Be7 10.c4 Qc7 11.cd5 ed5) 9.c4 dc4 10.Bc4 b5 11.Bd3 Be7 (11...b4 12.0-0=; 11...Bd6=) 12.0-0 0-0 13.Qe2 b4 14.ab4 Nb4 15.Bc4 a4 (15...Ne4 16.Ne5=) 16.Nc3+= Qa5 (16...Qe8 17.Ne5+=) 17.Ne5+/– Be8 18.Ba3 (18.Qd1 Qc7 19.Na4 Nc6+/–) 18...Nfd5+= 19.Qd2 (19.Bd5 ed5 20.Qg4 Rb6+=) 19...Nc3 (19...Nb6 20.Rfb1 Nc4 21.Nc4+=) 20.Qc3 Bb5 (20...Qc7 21.Rfc1+=) 21.Rab1 (better is 21.Rfb1 Bc4 22.Qc4+/– (worse is 22.Nc4 Qb5=)) 21...Rfc8?? (better is 21...Bc4 22.Nc4 Rfc8=) 22.Bb4+– (22.Rb4?! Bb4 23.Bb4 Qa6+/–) 22...Bb4 23.Qb4 (23.Rb4 a3+–) 23...Qb4 24.Rb4 (24.Rb4 Bc4 25.Rb8 Rb8 26.Nc4+–) 1–0. Winiger,Albert (2340) – Langschmidt,Dirk (2015), remoteschach.de, 2004.

4.Nf3 Nf6 5.e3 c5 6.c4 Nbd7 7.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 c5 6.e3 Nbd7 7.c4).

4.a4 d5 5.Nf3 Bd6 6.e3 0-0 7.d4= Ne4 8.Bd3 Nd7 9.0-0 Qe7 10.c4 b6 11.Ba3 Ndf6 12.Be4 Ne4 13.Bd6+= Qd6 14.Ne5 f6= 15.Nc6 Bd7 16.f3 Ng5 17.h4 Nf7 18.cd5 ed5 19.Qc2 Rfe8 20.Re1 Re6–/+ 21.Nd2 Bc6 22.bc6 Nd8 23.Kf2 Nc6–+ 24.Rac1 Rae8 25.Nf1 Nb4 26.Qf5 g6 27.Qb1 Qe7 28.Rc3 c5 29.dc5 d4 30.Rb3 Qc5 31.e4 Rc8 32.g3 Rec6 33.Kg2 Qd6 34.f4 Rc2 35.Kg1 R8c4 36.Rb2 Qc5 37.Rc2 Nc2 38.Kg2?? Ne1 (38...Ne1 39.Qe1 Rc2 40.Kh3 Qc4–+) 0–1. alexp (2390) – fifteenminutesofgame (2400), net–chess.com, 2004.

4.c4 d5 5.cd5 ed5 6.e3 Bd7 7.a4 Bd6 8.Nf3 Bg4 9.Bb2 0-0 10.Be2 Nbd7 11.d3 c6 12.bc6 bc6 13.Nbd2 Bb4 14.0-0 Rb8 15.Rb1 Bd2 (15...Re8 16.Qc2=) 16.Nd2 Be2 17.Qe2 Nc5 18.Qd1 (better is 18.Ba3 Na4 A) worse is 19.Bf8 Nc3 20.Qe1 Nb1 (worse is 20...Qf8 21.Rb8 Qb8 22.Nb1+/–) 21.Bg7 Kg7 22.Nb1 Rb3=; B) 19.Rb8 Qb8 20.Qd1+/–) 18...Nd3+= 19.Bf6 Qf6 (worse is 19...gf6 20.Rb8 Qb8 21.Qg4 Kh8 22.Qf5+=) 20.Rb8 Rb8 21.Nf3 Ne5 22.Nd4 Nc4 23.Qc2 c5 24.Nb3 Qb6 25.Rb1?? (better is 25.Nd2 Nd2 26.Qd2–/+) 25...Na3–+ 26.Qb2 Nb1 27.Qb1 Qb3 (27...Qb3 28.Qb3 Rb3–+) 0–1. Fournier,Frederic (2010) – Dinara (2570), Echecs21, 2003.

4.e3 d5 5.Nf3 (--> 2.a3 Nf6 3.Nf3 d5 4.e3 a5 5.b5).

4.Nf3 (--> 2.a3 Nf6 3.Nf3 a5 4.b5).

4.Nf3 d5 5.e3 (--> 2.a3 Nf6 3.Nf3 d5 4.e3 a5 5.b5).

3.d4 Nf6 4.Nc3 (4.Nf3 d5=) 4...Be7 (4...d5 5.Bf4=) 5.Nf3 (5.e4 d6=) 5...0-0 (5...d5 6.Bf4=) 6.e4 b6 7.e5 Ne8 8.h3 (8.Be2 a5 9.b5 d6+=) 8...Bb7 9.Be2 c5 (9...d6 10.0-0=) 10.dc5 bc5 11.bc5 Bc5 12.0-0 (12.Qd3 Qc7 13.Bf4 f6=) 12...Nc6 (12...f6 13.ef6 Nf6 14.Rb1=) 13.Re1 (13.Ne4 Be7+=) 13...Qb6 (13...Qc7 14.Rb1=) 14.Rf1 (better is 14.Rb1!? Qa7 15.Rf1+=) 14...Qc7+= 15.Bb2 (15.Bf4!?+=) 15...Ne5–/+ 16.Re1 (better is 16.Na4 Nf3 17.Bf3–/+) 16...Nc4?? (better is 16...Nf3 17.Bf3 Qb6–+) 17.Bc4+/– Bf2 18.Kf2 Qc4 19.Rb1 Nf6 20.Ne5 (20.Qd6 Bf3 21.gf3 Rfc8+/–) 20...Qf4 (20...Qc5 21.Kf1 d6+/–) 21.Nf3 (21.Kg1 Qg3 22.Re2 Rad8+/–) 21...Rab8 (21...Qc4 22.Qd3 Qc7+/–) 22.Qd4 (22.Qd3 Bf3 23.Qf3 Qh4 24.Qg3 Qg3 25.Kg3 d5+=) 22...Qf5 23.Qd3 Qh5 (23...Qc5 24.Kf1 Bf3 25.Qf3+/–) 24.Bc1 (24.Re5 Qg6+/–) 24...Rfc8 (better is 24...Bf3!? 25.Rb8 Rb8 26.Qf3 Qh4 27.Ke2 Qc4 28.Qd3 Qc6+/–) 25.Bf4+– Qc5 26.Kf1 Qc3 (26...Qa3 27.Rb3 Qa5 28.Bb8 Rb8 29.Ne4+–) 27.Bb8 Bf3 28.gf3 Qc2 (28...h5 29.Be5 c2 30.Qc2 Rc2 31.Rb6+–) 29.Qc2 Rc2 30.Be5 (30.Rec1 Rc1 31.Rc1 g5+–) 30...Rc8 (30...h6 31.Rb6+–) 31.Bf6 (31.Rec1 Rd8+–) 31...gf6 32.a4 (32.Rec1 Rd8+–) 32...Kf8 (32...Rc3 33.Kf2 Rc2 34.Re2+–) 33.Rb6 (33.Rec1 Ra8+–) 33...a5 34.Ra6 (34.Rb5 Ra8+–) 34...Rc3 35.Kf2 Rc5 36.Rb1 d5 37.Rb5 Rc2 38.Kg3 Kg7 39.Rba5 (39.Raa5 Ra2+–) 39...d4 (39...h5 40.Rb5+–) 40.Rd6 e5 (40...Rc4 41.Ra7+–) 41.Rad5 Re2 1–0. pillsbury (1910) – kyzomoto (1845), net–chess.com, 2007.

3.e4 b5 4.Nf3 Bb7 5.d3 g6 6.Be2 Bg7 7.0-0?? (better is 7.c3+=) 7...Ba1–+ 8.Nbd2 d5 9.Re1 Nf6 10.Nh4 (10.e5 Nfd7 11.d4 Bc3–+) 10...de4 11.Ne4 (11.Nb3 Bc3 12.Bd2 Bd2 13.Qd2 ed3 14.Bd3–+) 11...Ne4 12.de4 Qh4 13.g3 Qe4 (better is 13...Qf6 14.Bg5 Qg5 15.Qa1–+) 14.f3 (14.Bb5 ab5 15.Re4 Be4 16.Bg5–+) 14...Qd5 15.Bd3 (15.Bf4 Bc3 16.Qd5 Bd5–+ (16...Be1?? 17.Qb7 0-0 18.Qa8+–)) 15...Bd4 (better is 15...Qf3!? 16.Qf3 Bf3 17.Kf1–+) 16.Kg2 Nd7 (better is 16...Bc3 17.Re3 0-0 18.Qe2–+) 17.Be4 Qc4 18.Bb7 Ra7 19.Be4 (19.Bc6 0-0 (19...Qc6?! 20.Qd4 Qc2 21.Kh3–+) 20.Bd7 Rd8 21.Be6 fe6–+) 19...Ne5 20.h3 f5 21.Bd3 Qd5 22.Be3 c6 (better is 22...Be3 23.Re3 0-0–+) 23.Qd2 (23.Bd4 Qd4 24.Qe2 Nd3 25.Qe6 Kd8 26.cd3–+) 23...Nf3 24.Qf2 Ne1 25.Kh2 Be3 26.Qe1 Qe5 27.Kg2 f4 28.gf4 Qf4 29.c3 Rf8 (29...Rd7 30.Qb1 Qf2 31.Kh1 Rd3 32.Qe1 Qe1 33.Kg2 Qe2 34.Kh1 Rd1) 30.h4 Qg4 31.Kh1 Qh3 0–1. pieeater – 488, ChessWorld.net, 2012.

(--> 1.b4 e6 2.Bb2 Nf6 3.a3 a6).

4.e3 b5 5.c4 bc4 6.Bc4 Bb7 7.Nf3 (--> 1.b4 b5 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

4.Bb2 e5 5.Nf3 Nf6 6.Bc4 h6 (6...Ne4 7.Bd5= (worse is 7.Ne5 Ne5 8.Be5 Qe7–/+; worse is 7.Be5 Qe7–/+)) 7.Nc3 b5 8.0-0?? (8.Bb3 d6+=) 8...Bb7?? (8...bc4 9.Qe2–+) 9.Qe2?? (better is 9.Bd5!? Bd6 10.Bc6 dc6 11.d4 ed4 12.Qd4+=) 9...Nd4?? 10.Nd4+= ed4 11.Nd1 Qe7?? 12.Bb3 Be4 13.d3 Bd5 14.Bd5?? Nd5?? 15.Qf3+/– c6 16.Bd4 Qg5 17.Re1 Be7 18.Bc5 0-0= 19.Be7 Rfe8 20.Nb2 Ne7 21.c3 d5 22.d4 Nf5 23.Nd3 Nd6 24.a4 Re4 25.Red1 Rae8 26.h3 Ra8 27.Ne5 f6 28.Nc6 Rf4?? 29.Qd3 Ne4 30.Rd2?? Nd2= 31.Qd2 Re8 32.ab5 ab5 33.Na7 Ra8 34.Qe3 Re4 35.Qf3 Qd2 36.Kh2 Kf7 37.Qf5 Qc3 38.Ra6?? Qd4 39.Qh5?? Kg8 40.Qf5?? Re5 41.Qf3?? Qb4 42.g3?? Qe7 43.h4 Ra7 44.Kh3 Ra6 45.g4 Ra3 46.Qa3 Qa3 47.Kg2 Re2 48.h5 Qe3 49.Kg1 Qf2 50.Kh1 Qh2# (50...Qe1#) 0–1. pieeater – 488, ChessWorld.net, 2013.

4.Nf3 b5 5.Bb2 Nh6 6.d3 e5 (6...d5!?=) 7.Ne5+/– Ne5 8.Be5 d6 9.Bd4 Qg5 10.Nd2 Bb7 11.Nf3 Qd8 12.Be3 Ng4 13.g3 (13.Bf4!?+/–) 13...Ne3+= 14.fe3 d5 15.Ne5?? (better is 15.ed5 Bd5 16.c4 bc4 17.dc4+/–) 15...Bd6 16.Ng4 Qg5 17.Qf3 0-0 18.h4 (18.Qf5 Qf5 19.ef5 a5 20.ba5 Ra5+=) 18...Qe7 (18...de4 19.hg5 ef3–/+) 19.Bh3? (better is 19.ed5 Rae8 20.Kd2=) 19...de4–+ 20.Qe2?? (20.Qg2–+) 20...ed3 21.cd3 Bh1 22.Kd2 Bg3 23.Rh1 Qh4 24.Kc2?? Rfe8 25.e4?? Qg5 26.Rg1 Be5 27.Rg2 Qh4 28.Qe3 Rad8 29.Rd2 Rd6 30.Rg2 Rc6 31.Kd1 Bc3 32.Re2 Rd8 33.Kc2 Bd4 34.Kd2 Be3 ½–½. dumbroad – 488, ChessWorld.net, 2013.

3.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b5).

3.e3 a6 4.Nf3 f5 5.Bd3 g5 (5...Nf6!?=) 6.Bb2+/– Nf6 7.Ng5 h6 8.Nh3 Rg8 Black claimed a win on time 0–1. pieeater – dunk0104, ChessWorld.net, 2012.

3.e4 a6 4.Nf3 d5 5.e5 f5 (5...d4 6.c4 bc4 7.Bc4+=) 6.ef6 Nf6 7.Be2 h6? (7...Bd6 8.d4=) 8.Nc3 (8.Ne5 Rg8 9.d4+/–) 8...Ne4? (better is 8...Bd6+=) 9.Ne4+– de4 10.Ne5 Qf6?? (better is 10...Bd6 11.Bh5 Kf8 12.Ng6 Kg8 13.Nh8 Kh8+–) 11.Bh5 Ke7 12.Bb2 Kd8 13.Nc6!! Nc6 14.Bf6 Kd7 15.0-0 gf6 16.d3 ed3 17.Qd3 Ke7 18.Rfe1 Ne5 19.Qe4 Ra7 20.Rad1 Bb7 21.Qh4 Nc6 22.Bg4 e5 23.Rd7 Ke8 24.Qh5 1–0. pieeater – dunk0104, ChessWorld.net, 2013.

3.e4 Bb7 4.d3 d5 (4...a5 5.ba5 Nc6 6.d4 Ra5 7.Nf3=) 5.Nf3 (5.d4 a6 6.e5 Qd7+=) 5...de4=+ 6.de4 Qd1 7.Kd1 a6 8.Nc3 c5 9.Bd3 (9.bc5!? Bc5 10.Ke1=+) 9...cb4–/+ 10.ab4 Bb4 11.Bd2 Nf6 (11...Bc5–/+) 12.Ke2?? (better 12.Nb5!? Bd2 13.Nc7 Kd8 14.Na8=) 12...0-0 (12...Bc3 13.Bc3 Ne4 14.Bd4–+) 13.Rhe1 (better 13.Nb5!? Bd2 14.Nd6–/+) 13...Bc3–+ 14.Bc3 Be4 (14...Ne4 15.Bd4–+) 15.Be4 (15.Bf6 Bd3 16.Kd3 gf6–+) 15...Ne4 16.Bd2 Nd2 17.Kd2 Nc6 18.h3 (18.c4 Rfd8 19.Kc3 b4 20.Kb2 a5–+) 18...Rfd8 19.Kc1 a5 20.g4 (20.c3 a4–+) 20...b4 (20...a4 21.Re3–+) 21.h4 (21.Ra4 Rac8–+) 21...a4 22.Nd2 Nd4 Black intends b3 23.g5 (23.Ra2 Rac8 24.Kb1 Nb5–+) 23...b3 (better 23...Rac8 24.c4 bc3 25.Nf1 Nb3 26.Kc2 Rd2 27.Nd2 cd2 28.Kb2 Na1 29.Rd1–+) 24.cb3 Nb3 (better 24...Rac8 25.Kd1 ab3–+) 25.Nb3 ab3 26.Kb2 Ra1 27.Ka1 (27.Ra1 Rb8–+) 27...Rd2 28.f4 Rf2 29.Rd1 (29.Re4 Rh2–+) 29...g6 (29...h5!? 30.gh6 gh6 31.Rd4–+) 30.Rd8 Kg7 31.Rd1 (31.Rd4 Rh2–+) 31...Rf4 32.Kb2 (32.Rd3 Rh4 33.Rb3 h6–+) 32...Rh4 33.Kb3 Rg4 34.Ka3 Rg5 35.Kb4 h5 36.Kc4 Rg4 37.Kc5 (37.Kd3 g5–+) 37...h4 38.Rh1 g5 39.Kd6 Rd4 40.Ke5 Rd5 41.Ke4 f5 42.Ke3 Kg6 (42...Kg6 43.Rc1 e5–+) 0–1. pieeater – retiponziani (1775), ChessWorld.net, 2012.

3.e4 g6 4.Bb2+/– Nf6 5.Bb5 c6 6.Ba4 Bg7 7.d3 0-0 8.Nd2 d5 9.Ne2 (9.Ngf3 a5+/–) 9...Qb6 (9...a5 10.Bd4+/–) 10.Bd4 Qc7 11.f4 Nfd7 12.Bg7 Kg7 13.c4 de4 14.Ne4 Nf6 (14...c5 15.Qb3+/–) 15.Nf6+– Kf6 16.0-0 Kg7 17.Qc2 Nd7 18.Rae1 (18.d4 a5+–) 18...Bb7 19.Qc3 Kg8 20.Bc2 f5? (better is 20...c5+/–) 21.Nd4+– e5 (21...Rf6 22.Ne6 Qc8+–) 22.Ne6 Qc8 23.Nf8 Qf8 24.fe5 c5 (24...a5 25.d4+–) 25.e6 Nb6 (25...Nb8 26.e7 Qe8 27.bc5+–) 26.e7 Qe8 27.bc5 Nc8 (27...Na4 28.Qe5 Bc6+–) 28.Ba4! (28.Ba4 Qe7 29.Re7 Ne7 30.Qf6+–) 1–0. Rosner,Dirk – Nagel, Tiger SC, 1999.

4.e3 a6 5.d4 d5 6.Nf3 c6 7.Bd3 f5 (7...a5 8.c3=) 8.Nbd2+= Nf6 9.Nb3 Bd6 10.Na5 (10.0-0 Qe7+=) 10...Bc8 11.Ne5 Be5 (11...Qc7 12.0-0+=) 12.de5+/- Nfd7 13.f4 (13.Qh5 g6 14.Qh6 Qe7+=) 13...0-0+= 14.Bd4 (14.0-0 c5+=) 14...Qc7 (14...c5 15.Bc3=) 15.0-0 (15.Nb3 a5+/-) 15...Nb6 (15...c5 16.Bc3=) 16.Qe2 (16.Bc5!? Rd8 17.Bd6 Rd6 18.ed6 Qd6 19.Qh5+/-) 16...N8d7= 17.Rac1 (17.Nb3 Na4=) 17...c5 18.Bb2 (better 18.bc5!? Nc4 19.Bc4 bc4 20.Qd2 Nc5 21.Rb1=) 18...c4 19.Bf5? (better 19.Qh5!? cd3 20.cd3-/+) 19...ef5 (19...Rf5 20.Bd4-+) 20.Qh5 (20.Bd4 Nb8-+) 20...g6 (20...c3 21.Ba1-+) 21.Qg5 c3 22.Ba1 Re8 (22...Na4 23.Rcd1 Ndb6 24.Rd3-+) 23.Rcd1 Nf8 24.Rd3 Be6 25.Rc3 Qd7 (25...Nc4 26.Rd1-/+) 26.h4 (26.Rd1!?-/+) 26...Rac8 27.Rc8 Rc8 28.Rf2 Nc4 29.Nc4 Rc4 30.c3 (30.Bd4 Qc7-/+) 30...Re4 31.h5 (better 31.Qg3-+) 31...Kg7?? (better 31...Qa7!? 32.hg6 hg6-+ (32...Qe3 33.g7 Nd7 34.c4 Qc1 35.Rf1=+; 32...Ng6?! 33.Qd8 Nf8 34.Qg5 Kf7 35.Qh5 Ke7 36.Re2-+)) 32.hg6 (32.Qf6 Kg8 33.Qg5-+) 32...hg6 33.Qg3 (33.Qf6 Kg8 34.Rf3 Qf7-/+) 33...Nh7 34.Kh2 Qa7 35.Re2 (35.Rf3 Kf7-+) 35...Qc7 36.Qh4 (36.Re1 g5!-+) 36...Qd7 (36...g5 37.Qg3-+) 37.g4 (better 37.Qg3 Kf7 38.Re1-+) 37...fg4 38.Rd2 (38.Kh1-+) 38...Kf7 (38...Re3 39.Kg2-+) 39.c4?? (better 39.Qh7 Ke8 40.Qg6 Qf7 41.Qf7 Kf7 42.Re2+=) 39...Nf8 (39...Ke8 40.Qh6 Nf8 41.Bd4 dc4 42.Kg1-+) 40.Qh8?? (better 40.cd5 Ke8 41.Kg1 Bd5 42.Bd4-+) 40...Ke8 (better 40...Re3 41.f5 Bf5 42.Qg7 Kg7 43.e6 Kg8 44.ed7 g3 45.Kg2 Be4 46.Kf1 Nd7 47.cd5 g2 48.Rg2 Bg2 49.Kg2 Ra3 50.Bd4-+) 41.Qf6 (41.Bd4 dc4 42.Kg1-+) 41...Qe7 (better 41...Re3 42.Qh4 Rh3 43.Qh3 gh3-+) 42.Qe7=+ Ke7 43.c5 (43.c5 Re3 44.Bd4 Rh3 45.Kg1-+). danishguy (2140) - baatarg (2130), Rated Bullet game, lichess.org, 2020.

4.Nf3 a5 5.e3=.

4.Nf3 Nc6 5.d4 Nf6 6.Nc3 a6 7.e4+= a5 8.ba5+/– Na5 9.Bb5 Nc6? 10.0-0+– d5? 11.ed5 Nd5? 12.Nd5 ed5 13.Re1 Be7 14.Re5 0-0+/– 15.Rh5 Bf6 16.c3 g6 17.Rh6 Qd7 18.Qe2 Rfe8 19.Qf1 Kg7 20.Bc1 g5 21.Bg5?? Bg5=+ 22.Bc6 Bc6–/+ 23.Rh3 h6 24.Ng5 hg5–/+ 25.Qd3 Rh8 26.Rh8 Rh8 27.Qg3 f6 28.h3 Qf5 29.Re1 Qd7 30.f4 Qd6–/+ 31.Rf1 Kf7 32.Qg4 Bd7 33.Qf3 gf4 34.Qf4 Re8?? 35.Qd6= cd6 36.g4 Kg6 37.Kh2 f5 38.gf5 Bf5 39.Rg1 Kh5 40.Rg3 Re4 41.a4 Re2 42.Rg2 Bd3 43.Re2= Be2 44.Kg3 Kg5 45.h4 Kh5 46.a5 Bc4 47.Kh3 Ba6 48.Kg3 Kg6 49.Kg4 Be2 50.Kg3 Kf5 51.Kf2 Bc4 52.Kg3= Ke4 53.h5+= Kf5 54.Kh4 Ke6 55.Kg5 Kf7 56.h6 Bd3 57.h7 Bh7?? 58.a6+– (58.a6 Be4 59.a7+–) 1–0. I need chocolate... – Garyman, ChessWorld.net, 2005.

4.Nf3 d6 5.e3+= a6 6.d4 d5 7.Bd3 Nf6 8.0-0 Qd6 9.g3 (9.a4 ba4 10.Ra4 Qb6+=) 9...Nc6 (9...Be7 10.Bc3=) 10.h3 Nh5 11.Ne5 f6?? (better is 11...Nf6=) 12.Qh5+– g6 13.Bg6! Ke7 (13...hg6 14.Qg6) 14.Nf7 Qd7 (14...hg6 15.Qg6 (15.Qh8?! Kf7 16.Qh4 Bg7+–) 15...Rh3 16.Nd6 cd6 17.Kg2+–) 15.Nh8 hg6 16.Ng6 Kd6 17.Nf8 Rf8 18.f4 (18.a4 Ke7+–) 18...f5 (18...Qg7 19.Kg2+–) 19.Nc3 Rf7 20.Qe2 Rh7 21.Nb5 (21.Kg2 Ke7+–) 21...Ke7 (21...ab5 22.Qb5 Qc8 23.Kg2+–) 22.Nc3 Qe8 (22...Rh3 23.Kg2 Rh7 24.Rh1+–) 23.b5 Qh8 (23...ab5 24.Qb5 Qa8 25.Kf2+–) 24.bc6 Rh3 25.Qf3 Bc6 26.a4 Be8 27.Kf2 (27.Ba3!? Kd7+–) 27...Bh5 (27...Rh2 28.Ke1 Bh5 29.g4 Bg4 30.Qg3+–) 28.Qg2 Bg4 (28...Bd1 29.Ba3 Kd7 30.Kg1 Bc2 31.Nd5+– (31.Qc2?! Rh1 32.Kf2 Rh2 33.Ke1 Rc2+=)) 29.Nd5 (better is 29.Rh1 Rh5+–) 29...Kd6 (29...ed5 30.Qd5 Rh2 31.Kg1 Qh3 32.Ba3 Kf6 33.Qc6 Kf7 34.Qc7 Kg6 35.Qc6 Kg7 36.Qd7 Kg8 37.Qe8 Kh7 38.Qf7 Kh8 39.Qf6 Kg8 40.Qd8 Kf7 41.Qd5 Kg7+–) 30.Ba3 Kd7 31.Rh1 ed5 32.Qd5 Ke8 33.Qa8 (33.Qe6 Kd8 34.Be7 Ke8 35.Bd6 Kd8 36.Qe7 Kc8 37.Qc7) 33...Kf7 The mate threat is Qxa8 34.Qh8 Rh8 35.Rh8 (35.Rh8 Kg7 36.Rc8+–) 1–0. Borup,John – Karlsson,Roger, IECC, 2000.

4.Nf3 Nf6 5.e3 (--> 1.b4 Nf6 2.Bb2 b5 3.e3 Bb7 4.Nf3 e6 5.a3).

4.d3 Qf6 5.Bb2 d5 6.Rb1 a5 (6...Qd8!?=) 7.Nb5+/– Qe7 8.Qd2 (8.Be5!? Na6 9.ba5+/–) 8...Ba6 9.Nd4 e5 (9...ab4 10.ab4 Qb4 11.Ngf3=) 10.Nf5 Qe6 11.e4 de4 12.Ne3 (better is 12.de4!? Bf1 13.Kf1+=) 12...ab4+= 13.ab4 Nc6 14.Ba3 (better is 14.de4!? Bb4 15.c3=) 14...Qa2 15.Rb3? (15.Qc1 ed3 A) 16.Bd3? Bd3 17.cd3 Nd4–+ (17...Ra3?! 18.Qc6 Kd8 19.Qc2+=; 17...Qa3?! 18.Qc6 Kd8 19.Nc2+=); B) 16.Ra1–/+) 15...Nd4–+ 16.Rc3 ed3 17.Bd3 Bd3 18.Qd3 (18.Rd3 Ra3 19.Ra3 Qa3 20.c3–+) 18...Qb1 (18...Qa1!? 19.Nd1 Ra3 20.Ra3 Qa3 21.c3 (21.Qa3?? Nc2 22.Kd2 Na3–+) 21...Bb4 22.Qg3–+) 19.Kd2? (19.Qd1 Qd1 20.Kd1 Nf6–+) 19...Ra3! (19...Bb4 20.Bb4 Nf6 21.Ba3–+) 20.Ra3 Bb4 21.Rc3? Bc3 22.Qc3 c6 23.h4? Nf6–+ 24.f3 0-0 25.Nd1 Ra8 26.Nb2 Ra2 27.Ne2 Rb2 28.Rb1+– Rc2?? 29.Qc2 Nc2 30.Kc2 Kf8+– 31.Rb7 e4 32.f4 Ng4 33.Nd4 c5 34.Nf5 g6 35.Nd6 Ne3+– 36.Kd2 Ng2 37.Rf7 Kg8 38.Rc7 Nf4 39.Rc8 Kg7 40.Rc5 Ng2 41.Ne4 Nh4 42.Rc7 Kh6 43.Ke2 g5 44.Nf6 Kg6 45.Ng4 h5 46.Ne5 Kf5 47.Nd3 g4 48.Rc5 Kg6 49.Kf2 Nf5 50.Nf4 Kg5 51.Ne6 Kf6 52.Nf4 h4?? 53.Kg2 g3? 54.Nh3 Ne3 55.Kf3 Nf5 56.Kg4 Ne3 57.Kh4 Nf1 58.Ng1 Ke6 59.Kh3 Kd6 60.Rc1 Ne3 61.Kg3 Nf5 62.Kf2 Kd5 63.Rd1 Kc4 64.Ne2 Ne7 65.Rd4 Kb5 66.Kf3 Nc6 67.Rd5 Kc4 68.Rd2 Ne5 69.Kg2 Kc5 70.Rd4 Nc6 71.Rd1 Kb4 72.Rb1 Ka3 73.Nc3 Ne5 74.Nb5 Ka2 75.Rd1 Kb3 76.Nd4 Kc3 77.Nf5 Kc2 78.Ne3 Kb3 79.Nd5 Kc4 80.Kg3 Nd3 81.Nb6 Kc3 82.Na4 Kc2 83.Rf1 Nc1 84.Rf2 Kb3 85.Nc5 Kb4 86.Ne4 Nd3 87.Rd2 Ne5 88.Kf4 Ng6 89.Kf5 Ne7 90.Ke6 Nc6 91.Kf6 Na7 92.Rd4 Kb3 93.Ke6 Nc6 94.Rd3 Kb4 95.Kd5 Ne7 96.Ke6 Ng6?? 97.Rd4+– Kb3 98.Nc5 Kc3 99.Re4 Kd2 100.Kf7 Nh8 101.Kf6 Kc3 102.Ke6 Ng6 103.Kf5 Nf8 104.Kf6 Kd2 105.Rh4 Kc3 106.Kf7 Nd7 107.Nd7 Kd3 108.Ne5 Ke3 109.Kf6 Kf2 110.Kf5 Kg3 111.Kg5 Kf2 112.Kg4 Ke3 113.Kf5 Kf2 114.Kg4 Ke3 115.Rh3 Kd4 116.Nf3 Kd5 117.Kf4 Kc4 118.Ne5 Kd5 119.Rd3 Ke6 120.Rd4 Kf6 121.Rd6 Ke7+– 122.Nc4 Kf7 123.Ne5 Ke7+– 124.Rh6 Kd8 125.Nc6 Kc7 126.Ke5 Kb7 127.Kd5 Kb6 128.Nb8 Ka5 129.Kc4 Ka4 130.Ra6# 1–0. dumbroad – dunk0104, ChessWorld.net, 2012.

4.e4 Bb7 5.d3 g6 6.Bb2 Bg7 7.Nf3 Ne7 8.Be2 0-0 9.0-0 d5 10.ed5 Nd5 11.Qd2 c5 12.Rab1 cb4 13.Nd5 Bb2=+ 14.Rb2 ba3–/+ 15.Ra2 Bd5 16.c4 Bc6 17.Ra3 Qe7 18.Raa1 b4 19.Nd4 a5–/+ 20.Nc6 Nc6 21.Bf3 Qd6 22.Qe3 Ra6 23.Bc6 Qc6 24.Qe4 Qe4 25.de4 Rc8 26.Rfc1 Rc5 27.f3? a4 28.Rcb1 Rc4 29.Kf2 a3 30.Kg3 Ra4 31.Rc1 Rc1 32.Rc1 a2 33.h4 b3 34.h5 g5 35.e5 0–1. ftyre – vkurpnieks, net–chess.com, 2000.

3.Bb2 a5 4.e3 ab4 5.ab4 Ra1 6.Ba1 Bb4?? (better is 6...Nf6 7.b5 Bb7=) 7.Bg7+– f6 8.Bh8 Qe7 9.Qg4 Qf7 (9...Kf8 10.c3 Bd6 11.Nf3+–) 10.Bf6 (better is 10.Qb4 Bb7+–) 10...Bd2 11.Nd2 (11.Kd2 Nf6) 11...Nf6 12.Qc4 Ba6 (12...Nc6+–) 13.Qc7 Bf1 14.Qb8 Ke7 15.Kf1 Ng4 16.Ngf3 e5 17.Qb6 e4 18.Qb4 d6 19.Qe4 (19...Ne5 20.Ne5 de5 21.Qe5 Qe6 22.Qe6 Ke6 23.Ke2+–) 1–0. PepRally – grigoropoulo3, Live Game Caissa's Web, 2004.

3.Bb2 d5 (--> 1.b4 d5 2.Bb2 e6 3.a3 b6).

3.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6).

3.Nc3 Bb7 4.e3 Nf6 5.Nf3 Bf3 6.Qf3 Nc6 7.Qf4 (7.Ba6!?+=) 7...Bd6= 8.Qg5 0-0 9.h4 (9.Bb2!?=) 9...h6 (better is 9...a5 10.Bb2 h6–/+) 10.Qf6?? (better is 10.Qb5+=) 10...Qf6–+ 11.b5 Ne7 12.Bb2 Qg6 13.0-0-0 a6! 14.f3 (14.ba6 c6 Decoy) 14...c6 (14...ab5!? 15.Nb5 Bg3 16.Bd3–+) 15.ba6 b5 16.Ne4 Bc7 17.g4 f5 18.h5 Qf7 (18...fe4?! 19.hg6 ef3 20.c4 bc4 21.g5 hg5 22.Rh7–+) 19.Nc5 Nd5 (19...d6!? 20.Nd3–+) 20.g5 hg5 21.h6 gh6 22.Rh6 d6 (better is 22...e5–+) 23.Rh8 1–0. bertwhistle – fredric2, gameknot.com, 2013.

3.c4 Bb7 4.e3 d6 (4...Nf6 5.d4=) 5.Nc3 (5.d4 Nf6=) 5...g6 (5...Nf6 6.Nf3=) 6.d4+= Bg7 7.Nf3 Ne7 8.Bb2 0-0 9.Be2 Nd7 10.Qc2 a6 11.0-0 c5 12.Ne4 Nf6 (12...Nf5!?=) 13.Nf6+/– Bf6 14.dc5 Bb2 15.Qb2 Qc7 (15...bc5!? 16.bc5 Bf3 17.cd6 Be2 18.de7 Qe7 19.Qe2 Qc5+/–) 16.cd6+– Qd6 17.Rfd1 Qc7 (17...Qc6 18.Qf6 Qc7 19.Rac1+–) 18.Ne5 Rad8 (18...Rfd8 19.Ng4 Nf5 20.Nf6 Kf8 21.Nh7 Kg8 22.Nf6 Kf8 23.Rac1+–) 19.Ng4 Nf5 (19...e5 20.Qe5 Qe5 21.Ne5 Bc8+–) 20.Nf6 (20.Nf6 Kg7 21.Ne8 Kg8 22.Nc7+–) 1–0. Cirulis,Ilmars (1735) – Foster,Duncan (1675), FICGS, 2015.

3.d3 Ba6 4.e4 h6 5.g3 Bb7 6.Bg2 Nc6 7.Bb2 d6 8.e5 d5 9.Ne2 g5 10.d4 b5 11.c3 a5 12.Nd2 ab4 13.ab4 Ra1 14.Qa1 f6 15.ef6 Nf6 16.Qb1 Rg8 17.Nf3 Bd6 18.0-0 Na7 19.Bh3?? (19.Qd3 Qd7+/–) 19...Bc8?? (better is 19...g4 20.Qd3 Ne4–+) 20.Bg2 Bb7 21.Re1 g4 22.Ne5 Be5 23.de5 Nh5 24.Qh7 Qe7?? (better is 24...Rg7 25.Qh6 Qg5 26.Qg5 Rg5+–) 25.Qg8 Qf8 26.Qe6 Qe7 27.Bd5 Bc8 (27...Qe6 28.Be6 Bf3+–) 28.Qh6 Ng7 29.Nf4 Kd8 30.Qh8 Kd7 31.Rd1 (31.Rd1 c5 32.Be4 Kc7 33.Nd5 Kb8 34.Ne7 Ne6 35.Rd7 Nf4 36.Rb7 Ka8 37.Rb5 Nd5 38.Bd5 Nc6 39.Qc8 Ka7 40.Nc6) 1–0. Daz101 – 488, ChessWorld.net, 2012.

3.d4 g6 4.Nc3 Bg7 5.Bb2 Bb7 6.e4 d6 7.Nf3 Ne7 8.Be2 Nd7 9.0-0 0-0 10.Re1 h6 11.Bf1 a6 12.g3 b5 13.Bg2 1–0. pillsbury (2015) – ramoschessbrasil (2325), net–chess.com, 2011.

3.e3 c5 4.b5 a6 5.ba6 Ba6=+ 6.d3 Nc6 7.Bb2 Nf6 8.Nf3 d5 9.Be2 Bd6 10.0-0 0-0 11.Nbd2 Ng4 12.e4 d4=+ 13.h3 Nge5 14.c3 dc3 15.Bc3 Nd3 16.Ne5?? Nce5 17.Be5 Be5 18.Bd3 Bd3 19.Rc1 Bf1 20.Kf1 Qd3 21.Kg1 Rfd8 22.g3 Qd2 (22...Qd2 23.Qc2 Ra3 24.Qd2 Rd2–+) 0–1. aliwood – renegade, internet, 2005.

3.e3 g6 4.d4 Nc6 5.c4 Nb4? 6.ab4+– Nf6 7.Bd3 Ba6?? 8.Qf3 Bb4 9.Bd2 c6 (9...c6 10.Bb4 Bb7+–). mgriffin (1810) – buckfast, net–chess.com, 2001.

3.e4 a5 4.b5 Bc5 (better is 4...Bb7 5.Nc3 f5+=) 5.a4?? (better is 5.d4 Be7 6.Bd3+=) 5...Qf6–+ 6.Nf3 (6.d4 Bd4 7.Bf4 Ba1 (7...Qf4?! 8.Qd4 Qc1 9.Qd1 Qd1 10.Kd1–/+) 8.Bc7 Bb7–+) 6...Qa1 7.Nc3 Ba3 (7...Bb4!? 8.Bd3–+) 8.Ba3 Qa3 9.Be2 Ne7 10.0-0 0-0 11.Qa1 Qa1 12.Ra1 d5 13.ed5 Nd5 14.Ne4 c6 15.c4 (15.d4 Rd8 16.Re1 Bb7–+) 15...Nb4 (15...Nf4 16.Kf1–+) 16.Nd6 (16.d4 Rd8–+) 16...Nd7 (16...Rd8 17.Nc8 Rc8 18.Re1–+) 17.h3 c5 18.Ne5 (18.Rd1–+) 18...Ne5 19.Rd1 (19.f4 Ned3 20.g3 Rd8–+) 19...Ra7 (better is 19...Nbd3!? 20.g3 Rd8 21.f4 Rd6 22.fe5 Ne5 23.Kf2–+) 20.d4 cd4 21.Rd4 Rd7 22.Bf3 (22.f4 Nc4! 23.Bc4–+) 22...Nf3 23.gf3 Rfd8 24.f4 Rd6 25.Rd6 Rd6 white resigned 0–1. pillsbury (2090) – baumel (1855), net–chess.com, 2012.

3.e4 d6 4.d4+= h6 (4...Nf6 5.Nd2+=) 5.Bd3 Nc6 6.Nf3 Be7 7.Qe2 Nf6 8.b5 Na5 9.0-0 0-0 10.e5 de5 11.de5 (11.Qe5?! Bb7=) 11...Nd7?? (better is 11...Nd5+/–) 12.Qe4+– g6 13.Qa8 Kg7 (13...Bb7 14.Qd8 Rd8 15.Nbd2+–) 14.Qe4 (14.Qa7 Bb7 15.Nbd2 Nc5+–) 14...Nc5 (14...Bb7 15.Qe3 Bf3 16.Qf3 Ne5 17.Qe3 Nd3 18.Qh6 (< 18.Qd3 Qd3 19.Bb2 Bf6 20.Bf6 Kf6 21.cd3 Rd8+–) 18...Kg8 19.cd3+–) 15.Qe3 Bg5 (15...Rh8 16.Be2+–) 16.Ng5 hg5 17.Be2 Rh8 18.Rd1 Qe7 19.Nc3 Bb7 (19...Nd7 20.Ne4 g4 21.Qc3+–) 20.Qg3 Ne4 (20...g4+–) 21.Ne4 Be4 22.Bg5 (22...Qf8 23.Bf6 Kg8 24.Bh8 Kh8 25.Qh4 Kg7 26.Qf6 Kh7 27.Rd7+–) 1–0. Taulien,Hans_Juergen – Bitterling,Erik, remoteschach.de, 2003.

3.e4 Qf6 4.d4+= Ba6 5.Ba6 Na6 6.Nf3 Nh6 7.0-0 Ng4? (better is 7...c6!?+/–) 8.e5 (8.Qe2 Nb8 9.e5 Qg6+–) 8...Qe7? (better is 8...Qg6 9.Qe2 Nb8+–) 9.Qe2 g6 (9...Nh2 10.Kh2 (10.Qa6?! Nf1 11.Kf1 f6+/–) 10...Nb8 11.Bg5+–) 10.Qe4 Nh2 (10...Qd8 11.Qg4 f5 12.ef6 Qf6+–) 11.Qa8 Qd8 12.Qd8 Kd8 13.Bg5 Be7 14.Be7 Ke7 15.Kh2 h5 16.c4 h4 17.Nc3 f5 18.Nb5 Rh5 19.Na7 g5 20.c5 g4 21.cb6 (21.Ng1 bc5 22.b5 Rh8 23.ba6 Ra8+–) 21...gf3 22.b5 Rg5 (22...fg2 23.Kg2 h3 24.Kg3 cb6 25.ba6 Rh8+–) 23.ba6 fg2 24.Rg1 f4 25.Nc8 Kd8 26.bc7 (26.b7 Rg3 27.b8Q Rb3 28.Rg2 Rh3 29.Kh3 d5 30.Nd6 Kd7 31.Qe8) 26...Kc8 27.a7 f3 (27...Kb7 28.c8Q! Kc8 29.a8Q Kc7 30.Rgc1 Kb6 31.Rab1) 28.a8Q Kc7 29.Rgc1 Kb6 30.Rab1 1–0. Taulien,Hans_Juergen – Lausch,Axel, RSXL2 –2003.

3.e4 Nf6 4.Nc3 c5 5.bc5+= bc5 6.Bb5 Bd6 7.Nf3+= e5 8.0-0 a6 9.Bc4 Bb7 10.d3 Nc6 11.Bg5 Nd4 12.Nd5+/– Nf3 13.Qf3 Bd5 14.Bd5 Rb8 15.Bc4 Be7 16.Ba6+– h6 17.Bh4 Rb2 18.Qf5 d6 19.c4 0-0 20.Bb5 g6 21.Qf3 g5 22.Bg3+– h5 23.Qe3 Ng4 24.Qc1 Re2 25.Qd1 Rb2 26.Re1 h4 27.Bh4 gh4 28.Qg4 Bg5 29.h3 Qf6 30.Rf1 Rd2 31.Rad1 Ra2 32.a4 Rb8 33.g3 Kh7 34.f4 ef4+/– 35.Qh5 Bh6 36.Rf4 Qf4?? 37.gf4+– Rg8 38.Kf1 Rgg2 39.Qf7 Bg7 40.Qh5 Bh6 41.Qh4 Rh2 42.Qg4 Rhf2 43.Ke1 Rh2 44.Be8 Rh1 (44...Rh1 45.Qg1 Rg1#) 0–1. olo (1920) – bvanderweerd (1900), net–chess.com, 2007.

(--> 1.b4 b6 2.Bb2 Bb7 3.a3 e6).

4.e3 Qe7 (---> 1.b4 e6 2.Bb2 Qe7 3.a3 b6 4.e3 Bb7).

4.Nc3 a6 5.e4 c6 6.Nf3 h6 7.Be2 d5 8.e5 g6 9.0-0 Bg7 10.Bb2 Ne7 11.h3 b5 12.Re1 a5 13.Bf1 a4 14.Rb1 Nd7 15.Bc1 Nb6 16.Nh2 Qd7 17.Ng4 0-0-0 18.Qf3 Rdf8 19.Nf6 Bf6 20.Qf6 Nf5 21.Be3?? (better is 21.Bd3!?+=) 21...g5 (21...Qe8 22.g4 Nd7 23.Qh8 Rh8 24.gf5 gf5 25.Kh2–+) 22.Rbd1? (22.Bd3 Qe8 23.Bf5+=) 22...Ne3?? (better is 22...Rhg8 23.g4 Rg6 24.Qg6 fg6 25.gf5 gf5–+) 23.fe3 Kc7 24.e4 Nc8 25.ed5 cd5? (better is 25...ed5 26.Bd3 Qe6+/–) 26.Nb5 Kb8 27.Rc1 Na7 28.Nd6 Nc8 29.Nb7 Qb7 30.Re3 Na7 31.c4 Rc8 32.c5 Nc6 33.Rd3 Rcf8 34.Be2 Ka7 35.Rdd1 Qc7 36.b5 Qc8 37.bc6 Qc6 38.Rb1 Qc7 39.Rb4 (39.Rb4 Rfg8 40.Rdb1 Qc6 41.Qe7 Ka8 42.Ra4 Qa4 43.Qb7) 1–0. pillsbury (2105) – beammeupscotty (2130), net–chess.com, 2013.

4.Nc3 f5 5.Nf3 Nf6 6.e3 Be7 7.h3 0-0 8.Be2 d5 9.Ne5 c5 10.bc5 bc5 11.0-0 Nbd7 12.Bf3 Ne4 13.Be4 fe4 14.Nd7 Qd7 15.Bb2 cd4 16.Qd4–/+ Bf6 17.Qb4 a5 18.Qb6 Ba6 19.Nd1?? Bf1 20.Kf1 Bb2 21.Qb2 Qd6 22.Kg1 e5 23.Nc3 Rab8?? 24.Qa2=+ Rfd8 25.Ne4 Qc6–/+ 26.Nd2 Kh8 27.Rc1 h6 28.Nf3 Qf6 29.Qa1 Re8 30.c4 Rbc8 31.cd5= Rc1 32.Qc1 e4 33.Nd4 Rd8 34.Qc6 Rd6? 35.Qa8?? Kh7 36.Qa5 Qe5 37.Qc5 Rd5 38.Qc2 Rd7 39.f4 Qd5 40.a4 g6 41.Kf2 h5 42.g3 Kh6 43.h4 Rd8 44.Qd2 Rc8 45.a5 Ra8=+ 46.Qb4 Qa5 47.Qe7 Qd5 48.Kg2 Ra2 49.Kh3 Ra8 50.f5+/– gf5 51.Qg5 Kh7 52.Qh5 Kg8 53.Qg6 Kh8 54.Nf5 Qd7 55.Qh6 Kg8 56.Qg6 Kh8 57.Qf6 Kh7 58.Qh6 Kg8 59.Qg6?? Kh8= ½–½. pillsbury (2120) – vampirex (2250), net–chess.com, 2010.

4.e3 d5 5.Bb5 Bd7 6.Nf3 a6 7.Be2 Bd6 8.0-0 Nf6 9.c4 dc4 10.Bc4 0-0 11.Nbd2 Nd5 12.e4 Nf6? 13.e5+– Be5 14.de5 Nd5 15.Bb2 Nf4 16.Ne4 Ne7 17.g3 Bc6 18.Qc2 Be4 19.Qe4 Nfg6 20.Rad1 Qe8 21.h4 h5 22.Ng5 Nf5 23.Be2 Rd8 24.Bh5 Rd1 25.Rd1 Qa4 26.Qd3 Nge7 27.Rc1 c6 28.Bd1 Qb5 29.Qb5 cb5 30.Bb3 a5 31.ba5 ba5 32.Rc5 Rb8 33.Kh2 Nd4 34.Bd4 a4 35.Ba2 Nf5 36.Bc3 g6 37.Kh3 1–0. chessdeviant (2200) – islanderfan (1800), net–chess.com, 2007.

4.e4+= Nf6 5.Nc3 g6 6.b5 Ne7 7.Nf3 d6 8.h3 Bb7 9.Bd3 Bg7 10.0-0 Qd7 11.a4 c5 12.Rb1 cd4 13.Nd4 d5 14.e5 Ne4 15.Ne4 de4–/+ 16.Bc4 Be5 17.Bb2 0-0 18.c3?? Rac8 19.Bb3 a6 20.ba6 Ba6 21.Re1 Nc6 22.Nb5 Qd1–/+ 23.Rbd1 Bb5 24.ab5 Ne7 25.Re3 Nf5–/+ 26.Re4 Bc3 27.Bc3 Rc3 28.Bc4 Rc8 29.Be2 Ne7 30.Rd7 Rc1 31.Kh2 Nf5 32.Rf4 Re1 33.Bd3=+ e5 34.Rg4 h5 35.Re4 Re4=+ 36.Be4 Rc4 37.Bf5= gf5 38.Rd6 Rc2 39.f3 e4 40.fe4 fe4 41.Rb6 e3 42.Rb8 Kg7 43.Re8 e2 44.b6 Rb2 45.b7 Rb7 46.Re2 f5 47.h4 Kg6 48.Kh3 Rb3 49.g3? Rf3 50.Kg2= Ra3 51.Re6 Kf7 52.Rh6+/– Ra2 53.Kh3 Rf2 54.Rh5+/– Kg6 55.Rg5 Kf6 56.Rg8 Ke5 57.h5+– Rf1 58.Kg2 Ra1 59.h6 Ra7 60.Rg7 Ra8 61.h7 Rh8 62.Re7?? Kf6= 63.Ra7 Kg6 64.Kf3 Rh7 65.Ra6 Kg5 66.Ra5 Rf7 67.Ra8 Rf6 68.Ra5 Rf7 69.Kg2 ½–½. pillsbury (2075) – bvanderweerd (1900), net–chess.com, 2007.

4.Nf3 d5 5.Bb2 Nf6 6.e3 Be7 7.Bb5 Bd7 8.Bc6 Bc6=+ 9.Ne5 Bb7 10.0-0 0-0 11.Nc3 Nd7 12.Nd7 Qd7 13.Qf3 c5 14.dc5 d4–/+ 15.ed4?? Bf3–+ (15...Bf3 16.gf3 Qd4–+) 0–1. islanderfan (1800) – chessdeviant (2200), net–chess.com, 2007.

4.c4 a5 5.b5 White wins space 5...d5 6.Nf3 Nf6 7.Bb2 Be7 8.Nc3 0-0 9.d4 c5 10.bc6 Nc6 11.cd5 Nd5 12.Bd3 Nc3 13.Bc3 Ba6 14.Ba6 Ra6 15.Qd3 Qc8 16.0-0 Qb7 17.Rfb1 Rb8 18.Rb5 (18.e4 Na7+=) 18...Na7 19.Rh5 g6 20.Ng5 Bd8? (better is 20...Rc8 is the best option Black has 21.Bb2 b5=) 21.d5+– gh5?? Black falls apart (better is 21...Bg5 22.Rg5 b5+–) 22.Qh7 Kf8 23.Qg7 Ke8 24.de6 fe6 (24...Qe7 is no salvation 25.ef7 Kd7 26.f8Q Nc6 27.Rd1 Kc7 28.Ne6 Kb7 29.Nd8 Rd8 30.Qfe7 Ne7 31.Qe7 Kc6 32.Qd8 Ra7 33.Qd5 Kc7 34.Qc4 Kb7 35.Rd7 Kb8 36.Qg8) 25.Qg8 Ke7 26.Qf7 Kd6 27.Qe6 Kc5 28.Bd4 (28.Bd4 Kb5 29.Rb1 Ka4 30.Qb3) 1–0. Steffens,Olaf (2295) – Kelemen,Imre (2170), Nyiregyhaza op, 2001.

4.Nf3 f5 5.Bb2 Nf6 6.Nc3 Be7 7.Be2 0-0 8.d4 a6 9.0-0 d6 10.Bc4 d5 11.Bb3 Bd6 12.Ne2 Nbd7 13.Nf4 Re8 14.c4 dc4 15.Bc4 Bf4 16.ef4 Bd5 17.Be2 Bf3 18.Bf3 Nd5 19.Rc1 N7f6= 20.Re1 Qd6 21.g3 c6 22.Qc2 Rec8 23.Qe2 Kf7 24.Bg2 a5 25.ba5 Ra5 26.Rc2 g6 27.Rcc1 Ne7 28.Bc3+/– Ra3? 29.Bb4!+– Qb4 30.Qe6 Kg7 31.Rb1 Qd4?? 32.Qe7 (32.Qe7 Kh6 33.Qa3+–) 1–0. halocan (1735) – ookii (1740), internet, 2007.

4.Nc3 a5 5.b5 Nf6 6.e5 Nd5 7.Nd5 Bd5 8.Nf3 Be7 9.d4 d6 10.c4 Bb7 11.Be2 Nd7 12.0-0 0-0 13.Be3 de5 14.Ne5 Ne5 15.de5 Qd1 16.Rfd1 Rfd8 17.a4 g6 18.f3 Rab8 19.Rab1 Bb4 20.Bg5 Bc5 21.Kf1 Rd4 22.f4 c6 23.Rd4 Bd4 24.Bf3 cb5 25.Bb7 Rb7 26.Rd1 26...Rd7 27.cb5 Kf8 28.Ke2 Ke8 29.g4 Rd5 30.Rd3 Kf8 31.Bf6 Rd7 32.Kf3 Ke8 33.Ke4 Bf2 34.Rd7 Kd7 35.f5 gf5 36.gf5 Bg1 37.h4 Bc5 38.h5 Bf8 39.Bh4 Bc5 40.Bg3 Ke7 41.Kf4 Bd4 42.Bh4 Kf8 ½–½. flipper – LUPES, playchess.de, 2003.

4.Nc3 a6 5.d4 c6 6.Nf3 h6 7.Bb2 d5 8.e5 (8.Bd3 Nd7+/–) 8...b5 9.g3 g6 10.Bg2 Bg7 11.0-0 Ne7 12.Re1 Nd7 13.a4 0-0 14.ab5 (14.a5 Nf5+/–) 14...ab5 15.Qd3 g5 16.Ra8 Ba8 17.Ra1 Ng6 18.Ra7 Nb6 19.Ra2 (19.Nd2 Re8+/–) 19...Re8 20.Nd2 Re7 (20...Qe7 21.Nd1+=) 21.Bc1 Qb8 22.Bb2 Ra7 (22...Qd8 23.Bf3+/–) 23.Ra3 Ra3 24.Ba3 Nd7 25.Bb2 (25.Nd1 Qa7+/–) 25...Qd8 (25...Bf8!?=) 26.Bf3 Ndf8 27.Ne2 Qe7 28.c3 Bb7 29.Nb3 Nh7 30.Nc5 Nhf8 31.Nc1 f6 (31...Bc8+/–) 32.N1b3 (better is 32.Bh5 f5 33.N1b3+–) 32...fe5+= 33.Qe3 ed4 34.cd4 Ba8 35.Bh5 Qf7 (35...e5 36.Qd2+=) 36.Na5 (36.Nc1!?+/–) 36...Qf5+= 37.Bg6 Qg6 38.Nab7?? (better is 38.Qa3=) 38...Bb7 39.Nb7 Qb1 40.Qc1 Qc1 41.Bc1 Bd4 42.Bd2 Nd7 43.Nd8 c5?? (better is 43...Ne5 44.Be3 Bc3–+) 44.Ne6–/+ cb4?? (better is 44...Kf7 45.Nd4 cd4–/+) 45.Nd4+– b3 46.Nb3 Kf7 47.Nd4 Ne5 48.f4 gf4 49.gf4 Nc4 50.Bc3 Kg6 51.Nb5 (51.Kf2 Kh5+–) 51...Ne3 (51...Kf5 52.Bg7 Kf4 53.Nc3+–) 52.Bd2 Nc4 53.Bc1 Kf5 54.Nd4 (better is 54.Kf2!? Ke6+–) 54...Kf6 (54...Ke4 55.Nb3 Nd6 56.Kf2+–) 55.Kf2 1–0. pillsbury (2185) – beammeupscotty (2100), net–chess.com, 2015.

4.Nc3 Be7 5.d4 Nf6 6.e5 Ne4 7.Ne4 Be4 8.Qg4 Bg6 9.Nf3 c5 10.dc5 bc5 11.Bd3 cb4 12.ab4 Nc6 13.b5 Nb4 14.Bg6 hg6 15.Qe4 Rc8 16.c4 Qc7 17.Be3 Qc4 18.Qc4 Rc4 19.Ra7 Nc2 20.Kd2 Ne3 21.Ra8 Bd8 22.Ke3 Ke7 23.Kd3 Rb4 24.Rb8 Rb2 25.Rf1 f6 26.h3 Rb3 27.Kc2 Rc3 28.Kb2 Rc5 29.Rc1 Rd5 30.Rcc8 g5 31.b6 Rb5 32.Kc2 fe5 33.b7 Rf8 34.Nd2 d6 35.f3 d5 36.Nb1 Rb4 37.Nc3 g4 38.hg4 e4 39.Na4 ef3 40.gf3 Rh8 41.Nc5 Rh2 42.Kc3 Ba5 43.Ra8 Rc4 44.Kb3 Rb4 45.Ka3 Rh1 46.Ra5 Rb6 47.Nb3 Rb7 48.Kb2 Rf1 49.Kc2 Rf3 50.Nc5 Rf2 51.Kc1 Rf1 52.Kd2 Rb2 53.Kc3 Rbb1 54.Ra7 Kf6 55.Rf8 Ke5 56.Nd3 Ke4 57.Re8 Rb6 58.Nc5 Ke3 59.Re6 Re6 60.Ne6 g6 61.g5 Rc1 62.Kb2 Rc8 63.Rd7 Ke4 64.Rd8 Rd8 65.Nd8 d4 66.Kc2 Ke3 ½–½. Blitzmich – LUPES, playchess.de, 2002.

4.d3 c5 5.bc5 bc5 6.Nc3 Be7 7.Rb1 Bc6 8.Nf3 Nf6 (8...d5 9.ed5 ed5 10.d4+=) 9.Be2 (9.e5 Nd5 10.Nd5 Bd5+=) 9...c4 (9...0-0 10.0-0+=) 10.0-0 0-0 11.Ne5 Qa5 (11...Qc7!? 12.Nc4 d5 13.ed5 ed5+=) 12.Nc4+/– (12.Nc6?! Nc6 13.Rb5 Qa6 (worse is 13...Qc3 14.Bb2 Nd4 15.Bc3 Nb5 16.Bf6 Bf6 17.dc4 Na3 18.c3+/–) 14.dc4 Ba3+=) 12...Qc3? (better is 12...Qc7+/–) 13.Bb2+– Qc4 14.dc4 Ne4 15.Bf3 f5 16.Qd4 (16.Be5 Ba3 17.Qd3 d6 18.Bg7 Kg7 19.Qa3 Rd8+–) 16...Bf6 17.Qd3 Bb2 (17...Na6 18.Be4 Nc5 19.Qe3 Ne4 20.Bf6 Nf6 21.Rfd1+–) 18.Rb2 Na6 19.Qd4 Nac5 20.Rfb1 Na4 (20...Rae8 21.Be4 Ne4 22.Re1+–) 21.Be4 fe4 22.Rb4 a5 23.Rb5 Bb5 (23...Rf5+–) 24.cb5 Nc5 25.Qc5 Rac8 (25...Rfc8 26.Qe3+–) 26.Qd6 Rc2 27.b6 (better is 27.Qd7 Kh8 28.b6+–) 27...Rff2 (27...Rfc8 28.h3 Rc1 29.Rc1 Rc1 30.Kh2 h5+–) 28.b7 Rg2 29.Kh1 Rb2 30.b8Q Rb8 31.Rb8 Kf7 32.Qd7 Kg6 (32...Kf6 33.Rf8 Kg6 34.Qe6 Kh5 35.Qh3 Kg6 36.Qg2 Kh6 37.h4 g6 38.Rg8 e3 39.Qg5) 33.Qe6 Kh5 (33...Kg5 34.Qe5 Kh6 35.Rb5 g6 36.Qf4 g5 37.Qf7 Rh2 38.Kh2 e3 39.Rb6) 34.Rb5 Rg5 35.Qh3 Kg6 36.Rb6 Kf7 37.Qe6 Kf8 38.Rb8 1–0. market (2225) – Lutwidge (2085), GameColony.com, 2003.

4.Bb2 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.a3).

4.Bb2 Nf6 5.e3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7).

3.b5 Qa5 4.Nc3 (4.e4 d5=) 4...b6 (4...d5 5.e4 d4 6.Na2=) 5.Bb2 (5.e4 Bb7+=) 5...a6 (5...d5 6.e3=) 6.e3 (6.e4+=) 6...ab5 (better is 6...d5!?=) 7.Nb5+/– Kd8 (7...Ke7 8.Nc7 Ra7 9.Bc3+/–) 8.Qf3 (8.Bc3 Qa4 9.Nd6 Bd6 10.Bg7+–) 8...Nc6? (better is 8...f6+/–) 9.Qf7+– Do you see the mate threat? 9...Nge7 10.Bg7 Bg7 11.Qg7 Re8 (11...Rg8 12.Qh7 Ba6 13.Nd6+–) 12.Qh7 Ba6 13.Nd6 Rf8 (13...Rg8 14.c4+–) 14.Ba6 (14.Nf3 Nf5 15.Nf5 ef5 16.Ba6 Qa6+–) 14...Qa6 15.Nf3 Kc7 (15...b5 16.Rb1+–) 16.Nf7 Nf5 17.N7e5 Threatening mate: Qxd7 17...Ne5 18.Ne5 Rad8 (18...Qa4 19.Rb1+–) 19.Ng6 (19.g4 Rh8 20.Qf7 Qa8+–) 19...Rf6 (19...Rg8 20.g4 Rg7 21.Qh5+–) 20.c3 (20.g4 Qa8 21.Rg1 Nd4 22.ed4 Qf3+–) 20...Qb7 (20...Qa4 21.Ne5+–) 21.0-0 (better is 21.f3!? Nd6+–) 21...Qe4 22.f3 Qd3 (22...Qc2 23.e4 Nd6 24.Rab1+–) 23.e4 Ne3 (23...Nd6 24.Qh5+–) 24.de3 Qe3 25.Kh1 (better is 25.Rf2 Qg5 26.Ne7+–) 25...Qc3 (25...Qg5 26.f4 Qg6 27.Qg6 Rg6+–) 26.Rfd1 Rf3 (26...b5 27.Rac1 Qa3 28.Qe7+–) 27.Rdc1 Qf6 28.gf3 Qf3 29.Kg1 Qe4 30.Qf7 Qg4 (30...Qd4 31.Kg2 Qd2 32.Kf1 Qd3 33.Kf2 Qd2 34.Kf3 Qd3 35.Kg4 Qe2 36.Kg3 Qe3 37.Kh4 Qd4 38.Qf4 Qf4 39.Nf4+–) 31.Kf2 Qd4 32.Kf1 (32.Kf1 Qd3 33.Kg1 Qd4 34.Kg2 Qe4 35.Kg3 Qe3 36.Kh4 Qd4 37.Qf4 Qf4 38.Nf4+–; better is 32.Ke2!? Qe4 33.Kd2 Qg2 34.Kc3 Qh3 35.Kb2 Qh2 36.Rc2 Qd6+–) 1–0. Wall,Bill – Sonopa, internet, 2003.

3.b5 Qf6 4.Nc3 a6 5.e3 Bd6 6.Nf3 Ne7 7.Bb2 0-0 8.Na4 ab5 9.Bf6 1–0. dbinc007 – r8_28, gameknot.com, 2017.

3.b5 Nf6 4.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 c5 4.b5).

3.c3 c4 4.Nf3 d6 (4...d5 5.d3 cd3 6.ed3=) 5.e4+= b5 (5...Nf6 6.Bc4 Ne4 7.d3+=) 6.a4+/– Bd7 7.ab5 Bb5 8.Ra5 a6 9.Nd4 Qc7? (better is 9...Nc6 10.Rb5 Nd4+=) 10.Nb5+– Qc6 11.Qa4?? (11.N5a3 Qe4 12.Qe2 Qe2 13.Be2 d5+–) 11...Ke7? (11...Qe4 12.Kd1 ab5 13.Qb5 Nd7 14.Qc4+/–) 12.N1a3 (better is 12.Qa2 Qe4 13.Kd1+–) 12...d5?? (better is 12...Qe4 13.Kd1 ab5 14.Qb5 Ra5 15.ba5 Nd7+–) 13.Nd4 Qa4 14.Ra4 Nf6 15.Nab5! Ne4 (15...ab5 16.Ra5 Double attack (16.Ra8 Pinning; 16.Ra8 Deflection; 16.Ra5 Decoy)) 16.Nc7 (better is 16.d3 cd3 17.Bd3+–) 16…Ra7 (16...Ra7 17.f3 Rc7 18.fe4 de4+–). georginoh (1715) – presort (1940), net–chess.com, 2013.

3.c3 Nc6 4.e4 cb4 5.a4 a6 6.cb4 Bb4 7.Nf3 Qf6 8.Ra2 Nge7 9.Bb2 e5 10.g3 d6 11.Bg2 Be6 12.0-0?? Ba2 13.Nc3 Bc3 14.Bc3 0-0 15.Qc2 Be6 16.d3 Rac8 17.Qb2 Ng6 18.Qb7 Nd8 19.Qb2 Nc6 20.Qb6?? Nge7 21.Qa6 Nb8 22.Qa5 Rc5 23.Qb4 Nec6 24.Rc1 Nb4 25.Ne1 N8c6 26.Bd2 Rc1 27.Bc1 Ra8 28.Ba3 Ra4 29.Bb4 Nb4 (29...Nb4 30.Bf1 Ra1–+) 0–1. pillsbury (1950) – manson (1915), net–chess.com, 2007.

3.c3 f5 4.e3 h5 (4...Nf6!?=) 5.Nf3 a6 6.Bc4 b5 7.Bb3 c4 8.Bc2 Bb7 9.0-0 Qf6 10.d3 Bf3 11.Qf3 (worse is 11.gf3 d5+=) 11...Nc6 12.d4 Bd6 (12...a5 13.ba5 d5 14.Qf4+=) 13.e4 Qh4 (13...fe4 14.Qe4 (worse is 14.Be4 Qf3 15.Bf3 a5=) 14...Bc7 15.a4 ba4 16.Re1+/– (16.Ra4?! d5 17.Qe2 Nge7+/–)) 14.g3 Qe7 (14...Qg4!? 15.Qg4 fg4+/–) 15.ef5 0-0-0 (15...Nf6 16.fe6 Qe6 17.Bg6 Kd8 18.a4 ba4 19.Ra4+–) 16.fe6 (16.a4 Rf8+–) 16...Kc7 (16...Rf8 17.Qg2 h4+–) 17.d5 Ne5 18.Qe3 Ra8 19.a4 Rb8 (19...Nf6 20.ab5 Nd5 21.Qe4+–) 20.ab5 ab5 21.Ra7 Kd8 22.Na3 (better is 22.Qe2 Nf6 23.Bg5+–) 22...Qf6 (22...Nf6 23.f4 Nd5 24.Qe1+–) 23.Re1 (better is 23.f4 Nf3 24.Rf3 de6 25.de6+–) 23...Nf3 24.Kh1 Ne1 25.Qe1 (better is 25.Rd7 Ke8 26.Qe1+–) 25...Bc7? (25...Qf3 26.Kg1 Nf6 27.Bg5 Qd5 28.Rd7 Kc8 29.Rg7+–) 26.Be4 (26.d6 Bd6 27.Rd7 Ke8 28.Rd6 h4 29.Nb5 hg3 30.Nc7 Ke7 31.Rd7 Kf8 32.fg3 Ne7+–) 26...Be5?? (26...de6 27.de6 Qe6 28.Qd2 Qd6 29.Qg5 Ne7 30.Bf4 (30.Qg7?! Rg8 31.Qf7 Qe5+–) 30...Qd1 31.Kg2+–) 27.Be3 de6 28.de6 Qe6+/– 29.Qd2 Bd6?? 30.Bc6 Qe5 31.Nb5 Ne7 32.Nd6 Nc6 33.Nf7 (33.Nf7 Ke8 34.Qd7 Kf8 35.Ne5 Rb7 36.Ra8 Rb8 37.Qf7) 1–0. pieeater – Eries, ChessWorld.net, 2014.

3.Nc3 cb4–/+ 4.ab4 Bb4 5.Ba3 Ba3 6.Ra3 Nf6 7.e4 Nc6 8.Nf3 0-0 9.d4 d6 10.Be2 Bd7 11.d5 Ne5 12.h3 Nf3 13.gf3 Nh5 14.Rg1 Nf4 15.de6–/+ Be6 16.Qd4 f6 17.Bc4 Bc4 18.Qc4 Kh8 19.Qf1 Rc8 20.Ne2?? d5 21.Nf4=+ Qd6 22.Qg2 Rf7 23.Ng6 hg6–+ 24.Rd3 Qb4 25.Ke2?? Rc2 26.Ke3 Qc5 27.Kf4 g5 28.Kf5 de4 29.Kg6 ed3 30.Kf7 Qf5 31.Re1 Rc7 32.Re7 Qd5 33.Kf8 Qg8# 0–1. rhometal (1670) – mrdoop, net–chess.com, 2010.

3.bc5 d5 4.e3 Bc5 5.d4 Nf6?? (5...Be7 6.Nf3=) 6.c4?? (better 6.dc5 Nbd7 7.c4+-) 6...Be7= 7.Nf3 dc4 8.Nc3 (8.Bc4 0-0=) 8...Nc6 (better 8...b5!?-/+) 9.Bc4= h5 (9...a6 10.Bd3=) 10.0-0+= Ng4 11.h3 Bd6 (11...Nf6 12.e4+=) 12.Ne4 (worse 12.hg4 hg4 13.g3 gf3 14.Qf3 Bd7=+) 12...Bc7 13.Rb1 (13.hg4?! hg4 14.Ne5 Qh4=) 13...f5 (13...Nf6 14.Nf6 Qf6 15.Bb2+/-) 14.Neg5 (14.Nc5 Qe7+-) 14...Qd6 (14...Nh2 15.Nh2 Qg5 16.Nf3+/-) 15.Qb3 (15.hg4!? hg4 16.Ne5 Ne5 17.de5 Qe5+/-) 15...Nh2 16.a4 (16.Rd1 Nf3 17.Nf3 Na5 18.Bb5 Bd7+/-) 16...Nf3 (16...Nf1 17.Ba3 Nd2 18.Bd6 Nb3 19.Bc7+/-) 17.Nf3+/- Bd7?? (better 17...Na5 18.Bb5 Bd7+/-) 18.Ba3+- (18.Qb7?! Rb8 19.Ba3 Rb7 20.Bd6 Rb1 21.Bc7 Rb7=) 18...Na5 19.Bd6 Nb3 20.Bc7 (20.Rb3?! Bd6 21.Rb7 Ke7+-; 20.Bb3?! Bd6 21.Rfe1 Rc8+=) 20...Bc6 (20...Rc8 21.Bb3 Rc7+-) 21.Rb3 Bf3 (21...Rc8 22.Be5 Bf3 23.Be6+-) 22.gf3 0-0 (22...b6 23.Be6 Rf8 24.Rb5+-) 23.Be6 Kh7 24.Be5 (better 24.Rb7!? Rf6 25.d5 Re8+-) 24...Rae8 25.d5 Re7 26.Bf5! (26.Bf5 Rf5 27.f4+-) 1-0. kriku81 (2305) - jiacomo (1795), lichess.org, 2017. (=1.a3 c5 2.b4 e6)

3.e4 a5 4.b5 (4.bc5 Bc5 5.d4 Bb6+=) 4...d5 5.e5 (5.Bb2 de4 6.Nc3 Nf6=) 5...a4 (5...Nd7 6.Nf3=+) 6.Bb2 Qb6 (6...Nd7 7.Nf3=+) 7.Nf3 Bd7 (7...Nd7 8.c4 d4 9.Bd3=) 8.Nc3 (8.c4 dc4 9.Nc3 Bb5 10.Nb5 Qb5=) 8...d4= 9.Ne4 Bb5 10.Bb5 Qb5 11.Rb1 Qc6 (11...Nd7 12.d3 Qa5 13.Kf1=) 12.d3 Ne7? (better 12...Nd7 13.0-0 Be7=) 13.Nd6+- Kd7 14.Bd4! Nf5 (14...cd4 15.Rb4 Double attack (15.Rb7 Deflection; 15.Rb4 Decoy)) 15.Rb7 Qb7?? (15...Kd8 16.Qb1 Nd7 17.Nf5 Kc8+-) 16.Nb7 cd4 17.g4 Nh6 (17...Ra7 18.gf5 Rb7 19.Nd4+-) 18.Qb1 Ng4 (18...Ba3 19.Na5!! Ra7 20.Qb6+-) 19.Qb5 Nc6 (19...Kc8 20.0-0 Nh2 21.Kh2 Ba3+-) 20.Nc5 Bc5 21.Qb7 Ke8 22.Qc6 Ke7 23.Qc5 Kd8 24.Qd6 Kc8 25.Qc6 Kb8 26.0-0 (26.0-0 Ra6 27.Rb1 Rb6 28.Rb6 Ka7 29.Qb7) 1-0. Vendelo – Erectus, internet, 2021.

3.Nf3 cb4=+ 4.d4 Nf6 5.Bg5 Qa5 6.Bf6 gf6 7.e3 d5 8.Qd2 Bd7 9.Bd3 Rg8 10.g3 Nc6 11.0-0 (better is 11.Bh7!? Rh8 12.Bd3=+) 11...e5–+ (11...ba3?! 12.Qa5 Na5 13.Bh7–/+) 12.de5 fe5 13.e4 Bg4 (13...ba3?! 14.Qa5 Na5 15.ed5=) 14.Nh4 Nd4 (14...ba3?! 15.Qa5 Na5 16.ed5=+) 15.f3 (15.ed5!? Be7 16.Qe3 Qd5 17.Ng2–+) 15...Bh3 16.Rf2 de4 17.Be4 0-0-0 18.Qc1 Be7 19.Ng2 Qb6 20.Nd2?? (20.Kf1–+) 20...Ne2 (21.Kf1 Nc1 22.Rc1 Qf2 23.Kf2 Rd2 24.Ke3 Rg2 25.ab4 Rh2–+) 0–1. ricar67 – freddy007, ChessWorld.net, 2004.

3.Bb2 (--> 2.Bb2 c5 3.a3).

3.Bb2 cb4 4.ab4 (--> 1.b4 c5 2.a3 cb4 3.ab4 e6 4.Bb2).

3.Bb2 Nf6 4.b5 d5 5.e3 Bd6 6.Nf3 Nbd7 7.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3 0-0 7.c4 Nbd7).

4.ba6 Ra6 5.Nc3 Nc6 (5...d5 6.e3 Ra5 7.Nf3=) 6.e3 (better is 6.e4 Ra5 7.Nf3=) 6...Nge7?? (better is 6...Ra5=) 7.Ba6+/– ba6 8.Nf3 Bb7 (8...d5 9.0-0+/–) 9.Rb1+– Qc7 10.0-0 g6 (10...d5 11.e4+–) 11.Ne4 Bg7?? (11...Ng8+–) 12.Rb7! Qd8 (12...Qb7 13.Nd6 Double attack) 13.Nd6 Kf8 14.Ng5 Bf6 (14...Ne5 15.Bb2 N7c6 16.f4+–) 15.Ngf7 (15.Ngf7 Qa8 16.Nh8+–) 1–0. b4player – oppo, internet, 2009.

4.ba6 Na6 5.Bb2 d5 6.e3 Nf6 7.Bb5 Bd7 8.Bd7 Nd7=+ 9.Nf3 Nf6 10.0-0 Bd6 11.d3 0-0=+ 12.Nbd2 Rc8 13.c4= Nc7 14.cd5 ed5 15.Rb1 b5 16.h3 c4 17.dc4 bc4=+ 18.Be5 Ba3 19.Ra1 Bb4 20.Qa4 Be7 21.Rfd1 Ne6 22.Nd4 Nd4 23.Bd4–/+ c3 24.Nb3 Ne4 25.f3 Ng3 26.Kf2 Bh4–+ 27.Kg1 c2 28.Rd2–/+ Nf5 29.Rc1 Nd4 30.Nd4=+ Re8 31.Re2 Qg5 32.f4 Qg6 33.Rcc2?? h6 34.Qb5 Qe4 35.Qb3 Rc2 36.Nc2 Qc4 37.Qc4=+ dc4 38.Kh2 Bf6 39.g4 Bc3 40.Kg3 Re4 41.Kf3+/– Re8 42.h4 g6 (42...Bf6!?=) ½–½. MikeMcC – Chairboy, ChessWorld.net, 2004.

4.c4 ab5 5.cb5 b6 White has a new backward pawn: a3 (5...d5 6.e3=) 6.Bb2 Bb7 7.e3 Nf6 (7...d5 8.Qf3=) 8.Nf3 (8.h3 c4=) 8...d5 (8...Bf3 9.gf3 d5 10.Rg1+=) 9.Be2 (9.d3 Ra5 10.a4 Nbd7=) 9...Nbd7 (9...d4 10.Qc1=) 10.0-0 (10.d3 Qb8=) 10...Bd6 (10...c4 11.a4=) 11.Nc3 (11.d3 Ra7=) 11...e5 (11...Qe7 12.Nb1=) 12.d4 (12.d3 Qc7 13.Nd2 e4+=) 12...e4 Black wins space 13.Ne1 (13.Nh4 Qb8 14.dc5 bc5+= (worse is 14...Bc5 15.Na4+=)) 13...cd4 14.Qd4 Nc5 (14...h5 15.h3+=) 15.Ra2 (15.Qd1 Qb8 16.h4 Be5+=) 15...Ne6 Black threatens to win material: Ne6xd4 (15...h5 16.g3–/+) 16.Qd2 (16.Qd1 Qc7 17.g3 h6+=) 16...d4 (16...h5!? 17.f3 Ng4 18.fe4 Bh2 19.Kh1 Bf4 20.Bg4 hg4 21.Kg1 Bg3–+) 17.ed4+= Nd4 Black has an active position. 18.Kh1 Ne2 19.Ne2 Black has the pair of bishops 19...0-0 Black castles and improves king safety 20.Qg5 (20.Nc2!?+=) 20...h6 21.Qh4 Kh7 (21...Be7 22.Nd4 Qd5 23.Ra1–/+) 22.Bf6 Qf6 23.Qf6 gf6 24.Nc2 (24.Rd2 Ba3 25.Nc2 Bc5+=) 24...Bd5–/+ Black threatens to win material: Bd5xa2 25.Raa1 Bc4 26.Rfd1 (better is 26.Rfe1!?–/+) 26...Be5–+ (26...Be2?! is much worse 27.Rd6 Bb5 28.Ne3=) 27.Ned4 Bd3 28.Ra2 Ra4 (better is 28...Rfc8 a pity that Black didn't try this 29.f4 Bf4–+) 29.Nc6–/+ Bc4 30.Ne5 Ba2 31.Nd7 White threatens to win material: Nd7xf8 31...Rh8 32.Nf6 Kg6 (32...Kg7 33.Nh5 Kg6–/+) 33.Ng4? (better is 33.Nd7= would keep White alive) 33...Rc8–+ 34.Rd6 Kg7 (better is 34...f6!? 35.Ne5 Kg7–+) 35.Nge3–/+ Rc5 Black threatens to win material: Rc5xb5 36.Rb6? (better is 36.h4–/+) 36...Bb3–+ 37.Rc6 Rb5 38.h3 Bc2 39.Nc2 Rb1 40.Kh2 Rc1 41.Rc3 f5 42.Rg3 (42.Kg3!?–/+) 42...Kf7 43.Ne3?? sad, but how else could White save the game? (better is 43.Rc3–/+) 43...f4–+ 0–1. Corluy,H – Fedukin,Alexandre (2000), Brasschaat op, 2002.

4.c4 Nf6 5.Bb2 d5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 a6 6.c4).

4.Bb2 a6 5.a4 ab5=+ 6.ab5 Ra1 7.Ba1 Qa5 8.Nc3 d4 9.Ne4 Qb5 10.e3 Qc6 11.Ng3 e5 12.Nf3 Bd6 13.Qb1 Bd7 14.Bc4 b5–/+ 15.Ba2 Nf6 16.0-0 0-0 17.d3 de3 18.fe3 Re8 19.e4 Qa6 20.Nf5 Bf5 21.ef5 Nbd7 22.Re1? h6 23.h3 Qb6 24.Kh1 Qc6 25.Kg1 Kh8?? 26.Kh1?? Kh7 27.Kg1?? Kg8 28.Kh1 e4–+ 29.de4 Ne4 30.Kg1 c4 31.Nd4 Bc5 32.c3 Ndf6 33.Kh2? Qd6 34.Kg1 Qf4 35.Qc2 (35.Qc2 Kh7 36.Bc4 bc4 37.Qe2 Nc3 38.Bc3 Re2 39.Re2 Qc1 40.Be1 Bd4 41.Kh2–+). maaac (2370) – nay (2215), net–chess.com, 2007.

4.Bb2 Nf6+=.

4.e3 d4 5.ed4 cd4 6.Nf3 Nf6=.

4.e3 d4 5.e4 Bd6 6.Nf3=.

4.e3 d4 5.e4 e5 6.Bc4= Nf6 7.d3 (7.Nf3 Bd6 8.0-0 0-0+= (worse is 8...Ne4 9.Re1 Nf6 10.Ne5+=)) 7...Bd7 (7...a6 8.ba6 Na6 9.Nf3=) 8.Nf3= Bg4 (8...Qa5 9.Bd2 Qb6 10.Ne5+/–) 9.h3 (better is 9.Bf7!? Ke7 10.Bc4+/–) 9...Bf3= 10.Qf3 Be7 11.0-0 Nbd7 12.Qe2 (12.c3 dc3 13.Nc3 0-0+=) 12...0-0 (12...Nb6 13.Nd2=) 13.f4 Bd6 14.f5 (14.c3 dc3 15.Nc3 ef4 16.Bf4 Bf4 17.Rf4 Ne5=) 14...Nb6 15.Bb3 (15.Nd2 a6=) 15...Qc7 (15...Qd7 16.c4=) 16.Nd2 (16.Bg5 Qd8=) 16...Rac8 (16...a6 17.ba6 Ra6 18.Nc4+=) 17.Nc4= Nc4 18.Bc4 Kh8 (18...Rcd8 19.Bg5=) 19.g4 (19.Bg5 Be7+=) 19...Nd7 20.g5 Nb6 21.Qh5 (21.f6!?=) 21...Nc4+= 22.dc4 f6 (22...Be7 23.f6 gf6 24.gf6 Rg8 25.Kh2=) 23.g6 The mate threat is Qxh7 23...h6 24.Rf3 (24.Bd2 Rcd8=) 24...Rfe8 25.Rg3 (25.Rd3 Rcd8=) 25...Bf8 (25...Qa5 26.Kg2 Kg8 27.Rd3=) 26.Rg4 (26.Bd2 Rcd8=) 26...Re7 (26...Rcd8 27.Bd2=) 27.Bd2 Rd8 28.Rg3 a6 29.a4 a5 (29...Red7 30.a5=) 30.Kh1 (30.Rd1 Kg8+=) 30...b6 (30...Red7 31.Rd3=) 31.Rag1 (31.Rd1 Qb7 32.Qh4 Kg8=) 31...Rdd7 (31...Qb7 32.Qh4=) 32.Qf3 (32.Rd3 Re8=) 32...Kg8 (32...Re8 33.Rd1=) 33.Qe2 (33.Rd1 Re8=) 33...Kh8 (33...Re8 34.Rd3=) 34.Rg4 (34.Rd3 Re8=) 34...Kg8 (34...Re8 35.Qd3=) 35.Rh4 (35.Qd3 Re8=) 35...Qb7 (35...Re8 36.Qd3=) 36.Rg3 Qc7 37.Kg2 Qb7 (37...Re8 38.Qd3=) 38.Kf3 (38.Rd3 Qc7=) 38...Qc7 (38...Re8 39.Kg2=) 39.Qd3 Qb7 (39...Re8 40.Kg2=) 40.Ke2 (40.Kg2 Qc7=) 40...Qc7 (40...Re8 41.Kf1=) 41.Bc1 (41.Kf1 Re8=) 41...Qa7 42.Kd2 Qc7 (42...Qb7 43.Ke1+=) 43.Qe2 (43.Ke2 Re8+=) 43...Qd6 (43...Re8 44.Rd3+=) 44.Kd3 (44.Rd3 Re8+=) 44...Qc7 (44...Re8 45.Qh5+=) 45.Rh5 (45.Kd2!?=) 45...Qb7 46.Rg4 Qc7 (46...Re8 47.Qf3+=) 47.Rgh4 (47.Rg3 Re8+=) 47...Qb7 (47...Re8 48.Qf3+=) 48.Qg4 (48.Rg4 Re8+=) 48...Qc7 (better is 48...Re8+=) 49.Bh6 gh6 50.Rh6 Bh6 51.Rh6 Rg7 (better is 51...Rd6!?–+) 52.Qh4–/+ Threatening mate... how? 52...Rh7?? (52...Kf8 53.Qf6 Kg8 54.Qe6 Rdf7 55.gf7 Qf7 56.Qc8 Qf8 57.Rh8 Kh8 58.Qf8 Kh7 59.Ke2 d3 60.cd3 Rg2 61.Kf1 Rf2 62.Ke1 Re2 63.Kd1 Rd2 64.Kc1 Rc2 65.Kb1 Rb2 66.Ka1 Ra2 67.Ka2) 53.gh7+– Rh7 54.Rg6 Kf8 55.Qf6 Ke8 (55...Qf7 56.Qd8 Qe8 57.Rg8 Kg8 58.Qe8 Kg7 59.Qe5 Kf8 60.Qf6 Kg8+–) 56.Rg8 (56.Rg8 Kd7 57.Qe6) 1–0. Marinelli,P – Zuniga,J, Detroit–ch MI opB, 1994.

4.e3 Bd6 5.Bb2 e5 6.Nf3=+.

4.e3 Nf6 5.Nc3 Bd6 6.d4 cd4 7.Qd4 a6 8.b6 (better is 8.Nf3!?+=) 8...Nc6–+ 9.Qa4 Bd7 10.Qb3 0-0 11.Nce2 Rc8 12.Nf3 Na5 13.Qd3 Qb6 14.Nf4 Bf4 15.ef4 Bb5 16.Qd2 Bf1 17.Rf1 Qc7 18.Nh4 b6 19.Qe3 (19.Nf3 Ne4 20.Qd3 Qc2 21.Qc2 Rc2–+) 19...Qc2 20.Bd2 Nc4 21.Qd4 (21.Qc3 Qe4 22.Be3 Ng4–+) 21...Qd2 (better is 21...e5 22.fe5 Ne5 23.Qe5–+) 22.Qd2 Nd2 23.Kd2 Ne4 24.Ke1 Rc2 25.Nf3 Rfc8 26.Nd4 Rb2 27.f3 Nd6 28.Rf2 Rf2 29.f5 Rg2 30.fe6 Rg1 31.Ke2 Ra1 32.e7 Re8 33.Kf2 Re7 34.Kg2 Ra3 35.h4 b5 36.Nc6 Ree3 37.Nd4 Ra2 38.Kg3 b4 39.Kf4 Rd3 40.Nc6 b3 41.Ne5 Rd4 42.Ke3 Rh4 43.Nd3 b2 44.Nb2 Rb2 (44...Rb2 45.f4 Nf5 46.Kf3 Rb3 47.Kg2 Rg3 48.Kf2 Rh2 49.Kf1 Ne3 50.Ke1 Rg1; 44...Nf5 45.Kf2 Rb2 46.Kg1 Ne3 47.f4 Rg2) 0–1. dweigel (2015) – borisbdnv, net–chess.com, 2011.

4.Nf3 Nf6 5.e3 Bd6 6.Bb2 0-0 7.c4 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 Nbd7 11.Nc3 Nb6 12.Na4? Nc4–/+ 13.Bc4 dc4 14.Qc2 Bd7 15.Ng5? e5–/+ 16.f4 Qc7 17.Nc3? g6 18.0-0 Ra8 19.Nce4=+ Ne4 20.Ne4 Be6 21.Nd6= Qd6 22.Be5 Qd3 ½–½. McAleenan,Charles – Hjortstam,Kurt, corr or01–001, 2001.

4.ab4 d5 5.Nf3 Nf6 6.d3 Bd6 7.e4 Qc7 8.Bg5 de4 9.Bf6 ef3 10.Bd4 Nc6 11.Be3 fg2 12.Bg2 Be5 13.Bc6 Qc6 14.0-0 0-0 15.Ra7 Ra7 16.Ba7 b6 17.Qe1 Bb7 18.f3 Bc7 19.Qc1 Ra8 20.Qa3 Qd6 21.Qa2 Qd3 22.Rf2 Qg6 23.Kh1 Bb8 24.Nd2 Ra7 25.Qb2 Bf4 26.Nf1 Qd3 27.Kg2 Bc6 28.h3 b5 29.h4 Qg6 30.Kh1 Qg4 31.Qe2 Qh4 32.Kg1 Ra3 33.Qd3 Qf6 34.Rc2 Bc7 35.Kf2 Bb6 36.Ke2 Ra1 37.Rc1 Rc1 38.Kd2 Qf4 0–1. COMP – COMP, 2000.

4.cb4 b6 5.Nf3 Bb7 6.d3 Nf6 7.e4 Nc6 8.Be2= h6 9.0-0 Be7 10.Nc3 Qc7 11.d4+= a6 12.d5 ed5 13.ed5 Ne5 14.Ne5 Qe5 15.Bb2 Bd6 16.g3 0-0= 17.Rb1 Qe7 18.Re1 Qd8 19.Bc4 b5+= 20.Bb3 Re8 21.Re8 Qe8= 22.Ne2 Qe4 23.Bc2 Qd5–/+ 24.Qd5 Bd5 25.Nf4?? Bf4–/+ 26.gf4 Rc8 27.Bf5 Rc7 28.h4 Ne4 29.Rd1= Bc6 30.f3 Nf6 31.Bf6 gf6 32.Kf2 d5 33.Kg3 Kg7 34.Kg4 Re7 35.h5 Re3 36.Ra1? d4 37.Rg1?? Bf3–+ 38.Kh4 Kf8 39.Rc1 Ra3 40.Rc8 Kg7 41.Rd8 d3! 42.Bd3 Ra1 43.Rb8?! Rb1 44.Bb1+– Be2 45.Ra8 Bc4 46.Ra6 Be2 47.Ra2 Bc4 48.Rg2 Kf8 49.Rc2 Bd3 50.Rc8 Kg7 51.Bd3 (51.Bd3 f5 52.Bb5 Kf6 53.Re8 Kg7 54.Ba4 Kf6 55.b5 Kg7 56.b6 Kf6 57.b7 Kg7 58.b8Q Kh7 59.Qb2 f6 60.Qb7#) 1–0. pieeater – PADDYD, ChessWorld.net, 2010.

(--> 2.c3 d5 3.a3 c5).

4.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 c5 4.c3).

4.Qb3 d5=+ 5.d3 Nc6 6.Nf3 Be7 7.Bg5 0-0 8.h3 h6 9.Bh4 b6 10.e3 Bd7 11.Nbd2 Rc8 12.Be2 cb4 13.cb4 Qc7 14.0-0 Qd8 15.Nh2 Ne5 16.Rac1 Bb5 17.Nhf3 Nf3 18.Nf3 Qd7 19.Nd4 Ba4= 20.Qb2 Rc1 21.Rc1 Rc8 22.Bg3 Rc1 23.Qc1 Bd6 24.f4 a6 25.Bd1 Bd1 26.Qd1 Qc7 27.Qb3 Qc1–/+ 28.Kh2? Qe3–+ 29.Nc6 Bf4 30.Bf4 Qf4 31.Kh1 Qd6 32.Qa4 e5 33.b5 ab5 34.Qb5 Qc7 35.a4 e4 36.de4 de4 37.Ne5 e3 38.Qd3 Qe5 (38...Qe5 39.Qd8 Kh7 40.Qd3 Qe4–+) 0–1. brutus1 – federicos (1645), internet, 2007.

4.Bb2?? Qb6–+ 5.d4?? (better is 5.Qc1 Bf2 6.Kd1 Bg1 7.e3 Be3 8.de3–+) 5...Qb2 6.dc5 Qa1 7.e4 Nc6 8.Nf3 Nf6 9.Bd3 Ng4 10.0-0 Qf6 11.c4 Nce5 12.Be2 Nf3 13.Bf3 Ne5 14.Nd2 Nf3 15.Qf3 Qf3 16.Nf3 0-0 17.Rd1 b6 0–1. alaamattar (2215) – epprecht (2020), net–chess.com, 2011.

4.Bb2 Be7 5.e3 Nf6 6.Nf3 d5 7.g4 (7.Be2!?=) 7...0-0=+ 8.g5 Nfd7 9.h4 Nc6 10.Bd3 Bd6 11.h5 e5 12.e4 d4 (12...Nc5!? 13.ed5 Nd3 14.cd3 Nd4-/+) 13.g6=+ Nf6 14.Bc4 Kh8 15.Ng5 Be6?? (better 15...Qb6 16.Ra2 A) worse 16...fg6 17.hg6 h6 18.Nf7 Rf7 19.Bf7+/- (19.gf7?! Na5 20.Bd5 Nd5 21.ed5 Qc5=); B) 16...Nd8 17.Nh7 Nh7 18.gh7 Be6 19.Be6 Ne6=) 16.Be6+- fe6 17.Ne6 Qe7 18.Nf8 Rf8 19.d3 Nd8? (better 19...h6!?+/-) 20.gh7+- Ne6 21.Nd2 Nf4 22.Nc4 Bc5 23.Qf3 b5 24.Nd2 Nh7 25.Nb3 Ng5 26.Qg3 Bd6 27.h6 g6 28.a4 Bb4 29.Kd1 Kh7 (29...ba4 30.Ra4 Kh7 31.Rb4 Qb4 32.Qg5 Nd3 33.cd3 Qb3 34.Ke1 Qb4 35.Kf1+-) 30.ab5 Nge6 31.Ra6 Rc8 32.Rg1 (32.Bc1 Qf7+-) 32...Qc7 33.Rc6 Qd7 34.Bc1 Rc6 35.bc6 Qc6 36.Bd2 (better 36.Bf4 Nf4 37.Nd4+-) 36...Bd2= 37.Nd2 Qb6?? (better 37...Qc3 38.Nb3 Nc5+=) 38.Nb3 Qa6 (38...a5 39.Nc1+-) 39.Qg4 (39.Qh4 Qd6+-) 39...Qa2 40.Nc1 Qb2 41.Qh4 Qb7 (41...Qb4 42.Qf6 Qf8 43.Qe5 Qh6 44.Ne2+-) 42.Qf6 Qc7 43.Rg6! Ng6 44.Qe6 Kh6 45.Qh3 (45.f4!? ef4 46.Ne2+/-) 45...Kg7+= 46.Qf5 (46.Ne2 Qb7+=) 46...Qf7 (46...a5!?=) 47.Ne2 1-0. black_bishop_88 (2515) - Templarium (2550), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Bc5)

4.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 c5 4.bc5 Bc5).

4.Bb2 Nf6 5.e3 0-0 6.Nf3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 0-0).

4.d4 Qa5?? 5.Bd2+– Qb6 6.dc5 Qc5 7.Bb4 Qe5 8.Nf3 Qa1 9.Bc3 Qa2 10.Bg7 Nc6 11.Bh8 b5 12.e4 e5 13.Ne5 f6 14.Ng4 Qb2 15.c3 d5 16.Bd3 Kf7 17.0-0 Be6 18.ed5 Bd5 19.Bg6! Kg6 20.Qd3 f5 21.Qd5 Rc8 22.Qe6 (22.Qe6 Kg5 23.f4 Kg4 24.h3 Kh4 25.Bf6 Kh5 26.Qf5 Kh6 27.Qg5#) 1–0. themonkey – winningRAYS, GameColony.com, 2002.

4.d4 Bd6 5.e4+= Ne7 6.c4 b6 (6...Bc7 7.Qg4 0-0 8.Nf3=) 7.Nc3 Bb7 8.Nb5 Bc6?? (better is 8...Bc7 9.Bd3 f5+=) 9.Nd6+– Kf8 10.d5 ed5 11.cd5 Qc7 (11...Nd5 12.ed5 Qf6 13.Be3 Qc3 14.Bd2 Qe5 15.Ne2 Qd5 16.Bc3+–) 12.dc6 Nbc6 (12...dc6 13.Bc4 Nd5 14.Qg4+–) 13.Bf4 Ng6 14.Qb3 Ke7 (14...Nce5 15.Be5 Ne5+–) 15.Qf7 Kd8 16.Qg7 (16.Qg7 Re8 17.Nf7 Kc8 18.Ba6 Kb8 19.Bc7 Kc7 20.f3+–) 1–0. Rosner,Dirk – Neumann,Ulf, Tiger SC, 2000.

4.e3 d5 5.Nf3 (5.Bb2 Nf6=) 5...Nc6 (5...Nf6 6.d4 Bd6 7.c4=) 6.d4 Bd6 7.c4 dc4 8.Bc4 a6 (8...Nf6 9.0-0=) 9.Bb2 (9.e4 b5 10.Bd3 Bb7=) 9...Nf6 10.0-0 b5 11.Bd3 Bb7 12.Nbd2 Rc8 (12...0-0 13.e4 Bf4 14.Nb3=) 13.Ne4 (13.e4 Be7=) 13...Ne4+= 14.Be4 Qe7 (14...f5 15.Bd3 Na5 16.Qe2+=) 15.Qe2 (15.d5 Nb8 16.a4 0-0 17.ab5 ab5+=) 15...Na5 (15...0-0 16.Rfb1=) 16.Bb7 Qb7 17.Rfc1 (17.a4 Nb3 18.Ra2 ba4=) 17...Nc4 (17...0-0 18.Nd2+=) 18.Rc2 (18.Rc3 0-0+=) 18...0-0 19.a4 Nb2 (19...Qe4 20.Rac1 Qg6 21.ab5 ab5 22.e4+=) 20.Rb2 b4 21.Qd1 (21.e4 a5+=) 21...Rc3 (21...a5 22.Qb1+=) 22.Rc1 Rfc8 23.Rbc2 (23.Rc3 Rc3 24.Rb1 Qc6+=) 23...Qe4 (23...Rc2 24.Rc2 Rc2 25.Qc2–/+) 24.Rc3+= bc3 (24...Rc3 25.Rc3 bc3 26.Qb3=) 25.Qe2 Qc6 (25...Rc6 26.Ng5 Qd5 27.Qh5+=) 26.Qc2= Rb8 (26...f5 27.Ng5=) 27.Ng5 (27.Qc3?? Qc3 28.Rf1 Qc6–+) 27...h6 28.Ne4 (28.Qh7 Kf8 29.Ne4 c2–/+) 28...Ba3 29.Ra1 (better is 29.Rf1=) 29...Rb2–+ 30.Qd3 (30.Qc3 Qe4 31.Qc8 Kh7 32.Qa6 Qc2–+) 30...c2 31.Rc1 (better is 31.Nc5–+) 31...Rb3?? (31...Ra2 32.Nc3 Qc3 33.Qc3 Bc1 34.Qc8 Kh7–+) 32.Qb3+/– (32.Qc2?? Qc2 33.Nf6 gf6–+) 32...Bc1 33.Nc5 Be3 34.Qe3 Qb6 (34...Qd5!? 35.f3 Qc4=) 35.Nb3?? (better is 35.Qc1 Qb4 36.Nd3+= (36.Na6 Qb1 37.Qf1 c1Q 38.h4 Qf1 39.Kh2 Qe4 40.d5 Qfg2)) 35...Qb3!!–+ (35...Qb3 36.h3 Qb1 37.Kh2 c1Q 38.Qc1 Qc1–+) 0–1. Brodie,Hugh – Byrne,Michael TA, Ontario op Ottawa, 1969.

4.e3 d5 5.Nf3 Bf8 6.Bd3 Nf6 7.0-0 Nc6 8.a4 Be7 9.Ba3 0-0 10.Be7 (10.Bb5 Bd7=) 10...Qe7=+ 11.a5 e5 12.a6? (better 12.Be2=+) 12...e4-+ 13.ab7 Bb7 14.Be2 ef3 15.Bf3 Ne5 16.Nc3 (16.Be2 a5-+) 16...Nf3 17.Qf3 (17.gf3 Rfc8 18.Re1-+) 17...d4! 18.Qg3 (18.ed4 Bf3 Discovered attack) 18...dc3 19.dc3 (19.d3 a5-+) 19...Ne4 20.Qf4 Qf6 (better 20...Nc3!? 21.Rfe1-+) 21.Qf6 Nf6 22.Rfb1 Be4 23.f3 Bc2 24.Rb2 Bg6 25.e4 Rfc8 26.Rb7 a5 27.c4 h6 28.c5 (28.Ra4 Be4! 29.fe4 Ne4-+) 28...Rc5 29.h4 a4 30.g4 a3 31.h5 Bh5! 32.gh5 Rh5 33.Rb3 Rha5 34.Kf2 (34.Ra2 g5-+) 34...a2 35.Kg3 g5 36.e5 (36.Kf2 h5-+) 36...Re5 37.Rb2 Rea5 38.Rh2 Kg7 39.f4 (39.Kf2 h5 40.Ke1 h4-+) 39...Nd5 (39...Ra3 40.Kg2 Rb8 41.fg5 hg5 42.Rhh1 Rb2 43.Kf1 Ne4 44.Rh6 Rf3 45.Kg1 Rb1 46.Kh2 Rf2 47.Kh3 Rb3 48.Kg4 f5 49.Kh5 Rh2) 40.fg5 hg5 41.Kg4 (41.Rd2 f5-+) 41...Kg6 42.Rd2 Ra3 43.Rd5 (43.Rd3 Rd3 44.Rf1 Ra4 45.Rf4 Rf4) 43…R8a4 (43...R8a4 44.Rd4 Rd4) 0-1. black_bishop_88 (2545) - Arifars17 (2405), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Bc5)

4.e3 Be7 5.Bb2 Bf6 6.Bf6 Qf6 7.Nc3 b5? (better is 7...d5!?+=) 8.Nb5+– a6?? (better is 8...Kd8+–) 9.Nc7 Ke7 10.Na8 Qe5 11.Nb6 Qc5 12.Nc8 Qc8 13.Nf3 Qb7 14.Be2 Nf6 15.0-0 Rc8 16.c3 Qb2 17.Qa4 Nc6 (17...Qb7+–) 18.Rfb1 Qb1 19.Rb1 1–0. Fournier,Frederic – paniker, Active, 2006.

4.e3 Be7 5.Nf3 Nf6 6.Bb2 0-0 7.Be2 b6 8.0-0 Bb7 9.c4 d6 10.Nc3 Nbd7 11.d4 a6 12.Rb1 Qc7 13.Ba1 (13.Qd3 Qc6+=) 13...Rab8 14.Qb3 Rfc8 15.Rfc1 Ne4 16.Ne4 (16.Bd3 Nc3 17.Bc3 Bf3 18.gf3 Qc6=) 16...Be4 17.Bd3 Bd3 18.Qd3 b5 19.Qc2 (better 19.Nd2!?=+) 19...bc4-/+ 20.Rb8 Qb8 21.d5 e5 (21...ed5 22.Qf5 Qb5 23.Rb1-/+) 22.h4 (22.Nd2 Qb7 23.Qf5 Rc5-/+) 22...h6 (22...Qb7 23.e4-+) 23.Nd2 Nf6 (23...Qb7 24.Qe4-/+) 24.e4 Nh5 (24...Nd7 25.Rb1 Qa7 26.Nf3-/+) 25.g3 (25.Qd1 g6=) 25...Bd8 (25...f5!?=+) 26.Qd1 Nf6 27.Bc3 (27.Qe2!?=) 27...Bb6 28.Rb1 Qa7 29.Qf3 Bd4 30.Kg2 Bc3 31.Qc3 Qd4 (31...Ng4!? 32.Qf3 h5-/+) 32.Rc1=+ Rc5 33.f3 Rb5? (better 33...Qd3!? 34.Kf2 Nd7 35.Qd3 cd3 36.Rc5 Nc5+=) 34.Qd4+/- ed4 35.Nc4?? (35.Rc4 Rb2 36.Rd4 Ra2+/-) 35...Rb3?? (better 35...Rc5-/+) 36.Nd6+- Ra3 37.Nc4 (better 37.Rc8!? Kh7 38.Nf7+-) 37...Ra2 (37...Rc3!? 38.Rc3 dc3=) 38.Kh3 Rf2 39.f4 (39.Ne5!? d3 40.Rd1+/-) 39...h5 40.d6 Ng4 (40...Ne4?? 41.d7 Kh7 42.d8Q+-) 41.Rh1 Kf8 42.d7?? (better 42.Ne5 Ne5 43.fe5=) 42...Ke7-+ 43.Ne5 Ne5 44.fe5 Kd7 (44...d3 45.Rd1 d2 46.d8B Kd8 47.g4 hg4 48.Kg4=+) 45.Rd1 Ke6 46.Rd4 Ke5 47.Rd5 Ke4 48.Rf5?? (better 48.Rh5 Rf5 49.Rh8-/+) 48...Rf5 49.g4 If White now only could play a5... 49...Rf3 50.Kg2 hg4 51.h5 White threatens to counter with Ke3 51...Ke3 (51...Ke3 52.Kg1 Rg3 53.Kf1 a5 54.h6 gh6 55.Ke1 Rg1) 0-1. black_bishop_88 (2420) - Dondimi (2390), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Bc5)

4.e3 Ne7 5.Nf3 Bb6 6.a4 0-0 7.a5 (better 7.Be2!?=) 7...Ba5-/+ 8.Bb2 d5 9.Bd3 Nbc6 10.0-0 Ng6 11.Nc3 (11.Qe2 Bc7-/+) 11...Bc7 (11...e5 12.e4 Bc3 13.Bc3-+) 12.Ne2 (better 12.Ba3 Nge7 13.Ng5=+) 12...Qd6?? (12...e5!? 13.Ne1 Qg5-/+) 13.Ng3 (13.Ba3!? Qd8 14.Bg6 fg6 15.Bf8 Qf8 16.d4+/-) 13...e5 Black prepares the advance d4 (13...Qd7 14.c4-/+) 14.e4 (better 14.Ba3!? Qf6 15.Bf8 Nf8 16.c4=) 14...d4 15.Ba3 Nb4 16.Qb1 Ba5 17.c3 (better 17.Be2!? d3 18.Bd3+=) 17...dc3-/+ 18.dc3 Qd3 19.Qd3 Nd3 20.Bf8 Bc3 (worse 20...Nf8 21.Ra5 f6 22.Rd1+=) 21.Ra3 Kf8 (worse 21...Nf8 22.Rc3 Nb4 23.Ne5+=) 22.Rc3 Nb4 23.Rfc1 Nc6 24.Nf5 Nf4 25.R1c2 (25.Re3!?-/+) 25...Bf5 26.ef5 f6 (better 26...Rd8 27.h4 f6-/+) 27.Nd2?? (better 27.Rd2=+) 27...Ne2-+ 28.Kf1 Nc3 29.Rc3 Ke7 (29...Nd4!? 30.g4-+) 30.Ne4 a5 31.Nc5 Ra7 (31...b5!? 32.Ne6 Rc8 33.Rh3-+) 32.Nb7 Nd4?? (better 32...Kd7 33.Nc5 Kd6-+) 33.Rc7= Kf8 34.Rc8 Kf7 35.Rc7 Kf8 36.Rc8 Ke7 37.Rc7 Kf8 ½-½. black_bishop_88 (2550) - AyMisho (2555), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Bc5)

4.e3 Nf6 5.d4 Bb6 6.Nf3 0-0 7.Bd3 d6 8.0-0 Bd7 9.Nbd2 Bc6 10.Nc4 (10.e4 Qc7+=) 10...Nbd7 (10...Bc7 11.Qe2=) 11.Nb6 (11.Nd6 Bc7 12.Nb5 e5 13.Nc7 Qc7 14.de5 Ne5 15.Ne5 Qe5+/-) 11...ab6 (11...Nb6 12.Nd2=) 12.Qe2 Re8 (12...e5 13.Bf5+=) 13.e4 e5 14.d5 Ba4 15.Nh4 Nc5 16.Nf5 Nd3 17.cd3 Rc8 18.Bg5 Rc2 (18...h6 19.Bh6 gh6+-) 19.Qf3+- h6? (better 19...Bd7+-) 20.Nh6! gh6 (20...Kf8 21.Ng4 Bd7 22.Bf6 Bg4 23.Bg7 (23.Bd8?! Bf3 24.gf3 Rd8+/-; 23.Qg4?! Qf6 24.Rac1 Rc5+-) 23...Kg7 24.Qg4 Kh6 25.Rab1+-) 21.Bf6 (21.Bf6 Re7 22.Rac1+- (worse 22.Be7 Qe7 23.Qe3 Kg7+-)) 1-0. black_bishop_88 (2550) - eyupsabri (2365), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Bc5)

4.e3 Nf6 5.d4 Bb6 6.Nf3 d5 7.Bd3 Nc6 8.0-0 h5 (8...Bc7 9.Nbd2=) 9.c4 dc4 10.Bc4 Bc7 11.Nc3 Ng4 (11...0-0 12.Rb1+=) 12.h3 Qd6 (better 12...Nf6+=) 13.a4?? (13.Nb5 Qe7 14.e4+/- (worse 14.hg4 hg4 15.g3 gf3=+; 14.Nc7?! Qc7 15.Re1 Nf6+/-)) 13...e5?? (better 13...Nh2 14.Ne5 Nf1-/+) 14.Ba3 Qf6 15.de5?? (15.hg4 hg4 16.Nb5 Qh6 17.Nc7 Kd8 18.de5 Bd7 19.Ne6 fe6 20.Qd7 Kd7 21.Rfd1 Ke8-+) 15...Nce5?? (better 15...Nge5 16.Nd5 Nf3 17.Kh1 Qe5 18.Nc7 Qc7 19.Qf3 Be6+/-) 16.Nd5 Nf3 (16...Qd8 17.Be7 Qd7+-) 17.Qf3 (17.gf3 Bh2 18.Kg2 Qd8+-) 17...Qe5?? (better 17...Bh2 18.Kh1 Qf3 19.gf3 Be5+-) 18.Nc7 Qc7 19.hg4 (19.Qe4 Qe5 20.Bb5 Bd7 21.Bd7 Kd8 22.Rfd1 Qe4 23.Bc6 Kc7 24.Be4+-) 19...hg4?? (better 19...Qc4 20.g5 Qc6+/- (20...Qa4 21.Qd5 Rg8 22.Rfd1+-)) 20.Qf4 (20.Bb5 Bd7 21.Qe4 Kd8 22.Qe7 Kc8 23.Bd7 Qd7 24.Rac1 Qc6 25.Rfd1 a6 26.Rc6 bc6 27.Qd7 Kb8 28.Bd6) 20...Qf4 21.ef4 Be6 (21...Bd7 22.Rfe1 Kd8 23.Bf7+-) 22.Rfe1 (better 22.Bb5 Bd7 23.Rfe1 Kd8 24.Rad1+-) 22...0-0-0 23.Be6 fe6 24.Re6 Kb8 25.Re7 Rd2 26.Rg7 g3 (26...Rd5 27.Bb2+- (27.Rg4?! Rdh5 28.Bd6 Kc8+/-)) 27.Bc5 (27.fg3 Re8+-) 27...gf2 (27...Rd5 28.Rg5 Rg5 29.fg5 gf2 30.Kf2+-) 28.Bf2 Re8 (28...Rhd8 29.f5+-) 29.f5 Ree2 (29...Rd5 30.g4 Rf8+-) 30.Bg3 Kc8 31.Rc1 Kd8 (31...Rc2 32.Rc2 Rc2 33.f6 Rc1 34.Kf2+-) 32.Bf4 (32.Bh4 Re7 33.Re7 Rd7 34.Rg7 Re7 35.Re7 a6 36.Rb7 Ke8 37.Rc8) 32...Rc2+- 33.Rc2 Rc2 34.Rc7! Rc7 35.Bc7 Kc7 36.g4 Kd6 37.g5 Ke5 38.g6 Kf6 39.Kf2 a6 (39...b6 40.Kf3 a6 41.Kg4+-) 40.Ke3 b5 41.ab5 ab5 42.Kd4 Kf5 43.g7 Kf6 44.g8Q b4 (44...Kf5 45.Qf7 Kg4 46.Ke4 Kg3 47.Qf3 Kh2 48.Qf2 Kh3 49.Kf4 b4 50.Qg3) 45.Qb3 (45.Qh8 Kf5 46.Qe5 Kg6 47.Qe6 Kg7 48.Ke5 b3 49.Qf6 Kg8 50.Qg6 Kf8 51.Ke6 b2 52.Qf7) 45...Kf5 46.Qb4 (46.Qf7 Kg4 47.Ke4 Kg3 48.Qf3 Kh2 49.Qf2 Kh3 50.Kf4 b3 51.Qg3) 46...Kf4 (46...Ke6 47.Qa5 Kf7 48.Qf5 Kg8 49.Qg6 Kf8 50.Kd5 Ke7 51.Qg7 Ke8 52.Kd6 Kd8 53.Qd7) 47.Qc5 (47.Qf8 Kg5 48.Ke4 Kg6 49.Ke5 Kh7 50.Qf7 Kh6 51.Qg8 Kh5 52.Kf5 Kh4 53.Qg4) 47...Kf3 (47...Kg4 48.Ke4 Kg3 49.Qg1 Kh4 50.Kf4 Kh5 51.Qg5) 48.Qe5 (48.Qf5 Ke2 49.Qf6 Ke1 50.Ke3 Kd1 51.Qb2 Ke1 52.Qe2) 48...Kg4 (48...Kg2 49.Ke4 Kf2 50.Qh2 Ke1 51.Ke3 Kd1 52.Qd2) 49.Qe4 (49.Ke4 Kh3 50.Qg7 Kh4 51.Kf4 Kh5 52.Qg5) 49...Kg5 (49...Kh5 50.Ke5 Kg5 51.Qg2 Kh5 52.Kf5 Kh4 53.Qg4) 50.Ke5 (50.Ke5 Kh6 51.Qg4 Kh7 52.Kf6 Kh6 53.Qg6) 1-0. kriku81 (2370) - jiacomo (1795), lichess.org, 2018. (=1.a3 c5 2.b4 e6 3.bc5 Bc5)

4.Nf3 d5 5.d4 Bd6 6.g3 Nf6=+ 7.Bg2 Nc6 8.Nc3 a6= 9.0-0 0-0 10.Bb2 Ne4 11.Ne4= de4 12.Nd2 f5 13.c4 Kh8 14.Ne4 fe4=+ 15.Be4 Be7 16.e3=+ Bd7 17.Qh5+/– h6 18.Qg6 Kg8 19.Qh7 Kf7 20.d5 Rg8? 21.Qg6 Kf8 22.de6 (22.de6 Be8 23.Qf5 Bf6 24.a4+–) 1–0. alaamattar (2100) – bromer (2130), net–chess.com, 2005.

4.Nf3 d5 5.e3 Nf6 6.d4 Bd6 7.Nbd2 (7.c4 0-0=) 7...0-0 (7...Nc6 8.c4=) 8.Bd3= Nc6 (8...Nbd7 9.Bb2=) 9.c4=+ dc4 (9...Qa5!? 10.Bb2 dc4 11.Bc4 e5 12.de5 Be5 13.Ne5 Ne5=) 10.Nc4+= Bb8 (10...b6 11.Bb2+=) 11.Qc2 (11.Rb1 b6+–) 11...h6 (11...Qd5 12.e4 Qh5 13.e5+–) 12.0-0+– a6 (12...Qe7 13.a4+–) 13.Rd1 (13.Bd2 Bd7+–) 13...Qc7 14.Bb2 (14.Nce5 Ne5 15.de5 Qc2 16.Bc2 Nd5+–) 14...b5+= 15.Nce5 (15.Ncd2 Bb7+=) 15...Ne5 16.de5 Nd5 (16...Qc2 17.Bc2 Nd5 18.e4+=) 17.Rac1 (17.Qd2 Bb7+–) 17...Qc2 18.Rc2 (18.Bc2 Ra7+=) 18...Bb7+= 19.Nd2 (19.Bd4 Rd8+=) 19...Ba7 20.Nb3 (20.Ne4!? Rad8 21.Nd6+=) 20...Rac8= 21.Rdc1 Rc2 (21...Ne3 22.Rc8 Bc8 23.fe3 Be3 24.Kf1 Bc1 25.Bc1=) 22.Rc2 (worse 22.Bc2 Ne3 23.fe3 Be3 24.Kf1 Bc1 25.Nc1 a5=+) 22...Rd8 23.Bd4 (23.Be2 Rc8 24.Rc8 Bc8=) 23...Bd4 24.Nd4 g6 (24...Kf8 25.Rc1=) 25.g3 (25.Rc5=) 25...Kf8 (25...Rd7 26.Rc1=) 26.Kf1 (26.Bg6!? Nb6 27.Bd3+–) 26...Ke8 (26...b4 27.Ke1=) 27.Ke2 Rc8 (27...Ke7 28.Rc1=) 28.Rc8+= Bc8 29.Kd2 (29.e4 Ne7+=) 29...Kd7 30.e4 (30.h4 Bb7=) 30...Ne7= 31.f4 (31.Ke3 Bb7=) 31...Kc7+= 32.h4 (32.Ke3 Kb6=) 32...Nc6 (32...Bd7 33.Be2=) 33.Nc2 (33.Kc3 Bd7=) 33...Kb6= 34.h5 Kc5 35.g4 (35.Ne3 gh5 36.Be2 h4 37.gh4 Bb7=) 35...gh5=+ 36.gh5 a5 Black prepares b4 37.Ne3 Ne7 38.Ng4 (38.Nc2 b4=+) 38...Ng8 39.Ne3 (39.Bb1 b4 40.ab4 ab4=+) 39...Bb7 (39...Bd7 40.Bf1=+) 40.Kc3 (40.Nc2 Ne7=) 40...b4=+ 41.ab4 ab4 42.Kd2 Bc6 43.Bb1 Ba4 44.Kd3 (44.Ng2 f6=+) 44...Bb5 (44...f6 45.Ng4 fe5 46.Ne5=+) 45.Kd2 Kd4 46.Nc2 Kc4 47.Na1? (better 47.Ne1=+) 47...Ba4–+ 48.Nc2? (better 48.Bd3 Kd4 49.Nc2 Bc2 50.Bc2–+) 48...Bc2 49.Bc2 b3 50.Bd3 Kb4 51.f5 (51.Ba6 Ne7 52.Kd3–+) 51...Ne7 52.fe6 (52.Bb1 Nc6 53.f6–+) 52...fe6 53.Be2 (53.Bf1 Nc6–+) 53...Nc6 54.Bg4 (54.Bd1 Ne5 55.Kc1 Nc4 56.Bb3 Kb3–+) 54…Nd4 (54...Nd4 55.Bd1 Ka3 56.Bb3 Kb3–+) 0–1. Zehnter,Sebastian (2035) – Tvarijonas,Povilas (2170), Wch U14 Belfort, 2005. (=1.a3 c5 2.b4 e6 3.bc5 Bc5)

5.e3 d5 6.Nf3 Nf6 7.c4 dc4 8.Bc4 0-0 9.Bb2 Nc6 10.0-0 Na5 11.Bd3 Bd7 12.Nbd2 Rc8 13.Ne5 Nc6 14.Ndc4 Ne5 15.de5 Nd5 16.Nd6 Rc7 17.Qh5 g6 18.Qh6 Bc5 (18...Ba4!?+/–) 19.Rac1+– b6 (19...Bb6 20.Rc7 Qc7 21.Ne4+–) 20.Ne4 Be7?? (better is 20...f5 21.ef6 Ba4+–) 21.Nf6! (21.Nf6 Nf6 22.ef6 Bf6 23.Bf6 Qf6 24.Rc7+–) 1–0. aspasio (2795) – crobert (2290), net–chess.com, 2013.

5.e3 d5 6.Nf3 Nf6 7.c4 (7.Bd3 Nc6=) 7...dc4 (7...0-0 8.cd5 ed5 9.Bd3=) 8.Bc4 0-0 9.Bb2 (9.0-0 Nc6=) 9...Nc6 10.Nc3 Bd7 11.0-0 Rc8 12.Bd3 Re8 13.Na4 Na5 (13...Bc7 14.Rc1+=) 14.Rc1 (14.Nb6 Qb6 15.Rb1 Qd8+=) 14...Rc1= 15.Bc1 Bc7 16.e4 b6 (16...e5 17.Ne5 Be6 18.Bc2+=) 17.Nc3 (17.e5 Nd5+=) 17...h6 (17...e5 18.de5 Ng4 19.Bb5 Ne5 20.Ne5 Bb5 21.Nb5 Be5 22.Qd8 (worse is 22.Na7 Bh2 23.Kh2 Qc7 24.Kg1 Qa7=) 22...Rd8 23.Na7+/–) 18.Qe2 (18.Be3 Qe7+=) 18...e5 (18...Bc6 19.Nb5 Bb8 20.Bd2+=) 19.d5 (19.Ne5 Be5 20.de5 Re5+=) 19...Nb3 20.Be3 Qe7 (20...Bg4 21.Qc2 Nc5 22.Bc5 bc5 23.Nd2+=) 21.Rb1 (21.Nb5 Bb8+=) 21...Nc5= (21...Qa3? 22.Nb5 Bb5 23.Bb5+–) 22.Bc2 (22.Bc5 Qc5 23.Qb2 Rc8=). Kazimierski,Tomasz – Shim Ng Min,Francis, IECC, 1999.

5.e4 d5 6.e5 Nc6=.

5.e4 Nf6 6.e5 Nd5 7.c4 Nc7 8.Qg4 0-0 9.Bg5 Ba5 10.Nd2 Bd2 11.Kd2 f6 12.ef6 Rf6 13.Bf6 Qf6 14.Nf3 Nc6 15.Bd3 Na5 16.Qg3 d5 17.Qc7 Nb3 18.Ke2 Na1 19.Ra1 dc4 20.Bc4 Kh8 21.Ne5 Kg8 22.Rc1 h6 23.Bd3 a5 24.Qc8 Rc8 25.Rc8 Qf8 26.Bh7 Kh7 27.Rf8 h5 28.Rb8 1–0. themonkey – NN, GameColony.com, 2002.

5.e4 h6 6.c3 d5 7.e5 Ne7 8.Bd3 f5 9.ef6!+/– gf6 10.Qh5 Kd7+= 11.Nf3 Qe8 12.Qh4 Qf7 13.Bf4 Ng6 14.Qh5+/– Rg8 15.Bg3 Ke7 16.Qh6+/– Nd7 17.h4+– Ndf8 18.h5 Rh8 19.Qe3 a6? 20.Rh2 Bd7 21.c4 Rc8 22.cd5 Ba5 23.Kf1 Bc3 24.d6 Ke8 25.Nc3 Rc3 26.Bg6 Ng6 27.hg6 Qg7 28.Qc3 Rh2 29.Bh2 Qg6 30.Qc7 b5 31.Qb8 Kf7 32.Qd8 Qd3 33.Kg1 Be8 34.Qe7 Kg6 35.Qe8 Kf5 36.Qh5 Ke4 37.Re1 (37.Re1 Qe2 38.Re2 Kd3 39.Qc5 Ke2 40.Qc2#) 1–0. orane – gofigure, caissa.com, 2006.

5.Nf3 Nf6 6.c4 (6.e3 0-0=) 6...Nc6 (6...d6 7.e3=) 7.c5 (7.e3 0-0=) 7...Bc7 8.Nc3 0-0 9.Nb5 Ba5 10.Bd2 Ne4 11.e3 d5 12.Bd3 (12.cd6 a6 (12...Nd2?! 13.Nd2 a6 14.Nc7–/+) 13.Nc7 Nd2 14.Nd2 Rb8–/+ (worse is 14...Bc7 15.dc7 Qc7 16.Qf3=)) 12...a6+= 13.Nd6 Bd2 14.Nd2 Nd6 15.cd6 f5 (15...Qd6 16.Qh5 f5 17.0-0+=) 16.Be2 (16.Qf3 Qd6 17.0-0 e5 18.de5 Ne5+=) 16...f4 (16...Qd6 17.0-0+=) 17.Qb3 (17.Bd3 fe3 (17...Qd6?! 18.Qh5 h6 19.Qg6=) 18.fe3 Qh4 (worse is 18...Qd6 19.Qh5 h6 20.Nf3+=) 19.g3 Qh6–/+) 17...Qd6 18.Bf3 (18.0-0 b5–/+) 18...b5–/+ 19.Rc1 Bd7 (19...fe3 20.fe3 Ra7 21.0-0–/+) 20.Qa2 (20.0-0 Rac8–/+) 20...fe3 (20...Rac8 21.0-0–/+) 21.fe3 Na5 (21...Rf7 22.0-0–/+) 22.Qa1 Nc4 (22...Rac8 23.0-0–/+) 23.Nc4 bc4 24.0-0 Rab8 25.Rb1 Rb1 (25...Ba4 26.Rb8 Rb8 27.Rc1–/+) 26.Rb1 Be8 27.Rb7 Bg6 28.Qb2 Qd8 (28...a5 29.Qc3–/+) 29.Qb6 Qb6 30.Rb6 Rc8 (30...Kf7–/+) 31.Bg4?? (31.Re6 Be4 32.Be4 (32.Ra6 Bf3 33.Ra5 c3–+) 32...de4 33.Rb6–/+) 31...Bf7 (31...Bf5 32.Bf5 ef5 33.Rb2–+) 32.Kf2 (32.Bd1!?–/+) 32...c3–+ 33.Rb1 Rc6?? (33...h5 34.Be2 Bg6 35.Rc1–+) 34.Rc1?? (34.Rb8 Be8 35.Bh5–/+ (35.Re8 Kf7 36.Re6 Re6 37.Be6 Ke6+/–)) 34...Bg6–+ 35.Bf3 Kf7 36.h4 Ke7 (36...Bd3 37.Be2 Be4 38.Bf3–+) 37.a4 (37.Ke2 Kd6–+) 37...Kd6 38.h5 (38.Ke2 h5–+) 38...Bd3 39.Bd1 e5 (39...c2 40.Be2 Be4 41.Bf3 Bf3 42.gf3–+) 40.Bc2 Bc2 41.Rc2 ed4 (41...Ke6 42.Ke2–+) 42.ed4–/+ Kc7 43.Ke3 Kb6 44.Kf4 Ka5 (44...Ka5 45.h6 g5 (worse is 45...gh6 46.Ke3–+) 46.Ke5 Ka4 47.Kd5 Kb3–+) 0–1. Baer,Werner – Winiger,Albert, TT–07 ETC, 2003.

5.c4 Nf6 6.Nc3 d5 7.Bg5 Nc6 8.e3 dc4 9.Bc4?? (better is 9.Bf6 Bf6 10.Bc4=) 9...Qa5–+ (9...Qa5 10.Nge2 Qg5–+) 0–1. Mavizi,Hamid – Van De Peut,Aart (2025), IECG, 2007.

5.e4 Nc6 6.Nf3 Nf6 7.Bd3 d5 8.e5 Ne4 (8...Nd7 9.Qe2=) 9.0-0+= f5 10.ef6 Bf6 11.c3 0-0 12.Qb3 (12.Re1 e5 13.de5 Ne5 14.Be4 de4 15.Qd8 Rd8 16.Ne5 Be5+=) 12...Qa5 Exerts pressure on the backward pawn (12...Ng5 13.Bg5 Bg5 14.Ng5 Qg5 15.Re1=) 13.a4 (13.Be3 Nd6=) 13...h6 (13...Rf7 14.Qb5=) 14.Be3 Rf7 15.Qb5 Nd6 16.Qa5 Na5 17.Nbd2 Nc6 (17...Rc7 18.Rfc1+=) 18.Bf4 Be7 19.Be5 Nf5 20.h3 Bd7 21.Bh2 (21.a5 Bd8 22.a6 ba6+=) 21...Rff8 (21...Rc8 22.a5+=) 22.a5 Rac8 (22...Bd6 23.Bd6 Nd6 24.Rfe1+=) 23.Rfb1+/– Nd8 24.c4 (24.Ne5 Be8 25.Rb3 Bd6+/–) 24...dc4+= 25.Nc4 Bc6 26.Nfe5 Be8 (26...Nd4 27.Ng6 Re8 28.Nd6 Bd6 29.Bd6+=) 27.a6 (27.Bf5 ef5 28.d5 f4+=) 27...b5= 28.Nb6 (28.Bf5 ef5 29.Ne3=) 28...ab6+/– 29.a7 Bc6 30.Bf5 Rf5 (worse is 30...ef5 31.Rc1+– (31.Nc6 Nc6 32.d5 Nb4–/+)) 31.Nc6 (31.Rc1 Re5 32.Be5 Ra8=) 31...Nc6 32.a8Q Ra8 33.Ra8 Kf7 Black prepares the advance b4 34.Ra6 (34.Bc7 b4=) 34...Nd4 35.Rb6 (35.Bc7 b4=) 35...Rd5 36.Kf1 b4 37.Rb7 Kf6 38.Bg3 g5 39.Rd1 (39.f3 Nc2=) 39...Bc5 40.Bd6?? (better is 40.Bc7 Nb3 41.Rd5 ed5 42.g4=) 40...Bd6–+ 41.Rh7 b3 0–1. Cirulis,Ilmars (1905) – Evgen,Novik (1900), FICGS, 2015.

5.e4 d5 6.e5 f6 7.Nf3 a6 8.Bb2 (8.Bd3 Nc6+=) 8...Nc6= 9.c4 Nh6 10.ef6 Bf6 11.c5 0-0 12.h3 (12.Bd3!?=) 12...Nf5 13.Be2 (better is 13.Bd3+=) 13...Nfd4 (better is 13...Ncd4 14.Nd4 Qa5 15.Qd2 Qd2 16.Nd2 Bd4 17.Bd4 Nd4–/+) 14.Nd4+= Bd4 (14...Qa5!? 15.Kf1 Qc5=) 15.Bd4+/– e5 (15...Qa5 16.Bc3 Qc5 17.Bf3+/–) 16.Bb2 (better is 16.Be3+–) 16...Qf6? (16...Qa5!? 17.Nc3 d4+/–) 17.0-0 (17.Qd5 Be6 18.Qf3 Qg6+–) 17...Qg6? (17...Be6 18.Bd3+–) 18.Kh2 (better is 18.Qd5 Kh8 19.Qd3+– (19.Be5?! Be6 20.Qd3 Bf5+–)) 18...Be6 19.Bd3 e4 20.Bc2 Rf5 21.f4 (better is 21.f3!?+–) 21...Raf8+/– 22.Nc3 Rf4 23.Rf4 Rf4 24.Bc1?? (24.Nd5 Rf2 25.Ne3 Bh3+/–) 24...Bh3?? (better is 24...Rf2 25.Qg1 Rc2 26.Nd5 Bd5–+) 25.gh3?? (better is 25.Qd2 Nd4 26.Nd5+/–) 25...Rf2 26.Kh1 Qg2# 0–1. pillsbury (2095) – baumel (1855), net–chess.com, 2012.

5.e4 d5 6.e5 f6 7.Nf3 Nc6 8.Be2 (8.Bd3 fe5 9.de5 Qc7+=) 8...Qc7 (8...Qa5 9.Bd2 Qb6 10.Bc3=) 9.Bf4 g5 10.ef6 Qf4 11.fe7 Nge7 (11...g4 12.Ne5 Nd4 13.Ng4 Ne2 14.Qe2 Ne7 15.Nd2=) 12.g3 (12.h3 e5=) 12...Qf6 13.c3 Bd7 (13...0-0 14.0-0+=) 14.Qd2 (14.h3 0-0=) 14...h6 (14...g4 15.Ng1 h5 16.h3=) 15.a4 (15.h4 g4 16.Nh2 h5=) 15...0-0 (15...g4 16.Ng1 e5 17.de5 Ne5 18.h3+=) 16.0-0 (16.h3 Rac8=) 16...Ng6 (16...Rac8!?+=) 17.h4= gh4 18.Qh6 hg3 19.fg3 Qg7 20.Qg7 Kg7 21.Nbd2 (21.Bd3 Rf6=) 21...b6 (21...e5 22.de5 Nce5 23.a5=) 22.Bd3 Rae8 (22...Rf6 23.c4+=) 23.Bb5 (23.c4 Nge7+=) 23...Re7 (23...e5 24.de5 Nge5 25.Nd4=) 24.Ng5 (24.Rfe1 Rf6+=) 24...Rf1 25.Rf1 e5 26.Ndf3 (26.de5 Nce5 27.Bd7 Nd7=) 26...e4+= 27.Nh4 Nh4 28.gh4 Kg6 29.Rf8 Kh5 30.Rh8 Kg6 31.Be2 (31.Kf2 Kf5=) 31...Kf5 (31...Na5 32.Kf2=) 32.Rg8 (32.Bh5 Kf4=) 32...Kf6 33.Bh5 (33.Kf2 Na5 34.Bb5 e3 35.Ke1 Nc4+=) 33...Be6 ½–½. Hogic,Enes – Hadzic,Latif (2045), 2rd Tuzla Bosnia Herz., Team Champio, 2015.

5.e4 Nf6 6.Bd3 d6 7.Nf3 Nbd7 8.Bg5 b6 9.Nbd2 Bb7 10.h4 h6 11.Be3 Qc7 12.0-0 e5 13.Rc1 Ng4 14.Nh2 (14.c4!?=) 14...Nh2 15.Kh2 Bh4 16.Qg4 Bg5 17.f4 Nf6 18.Qh3? (better is 18.Qf3 ef4 19.Bf4+=) 18...Bc8–+ 19.Bb5 Ke7 (better is 19...Kd8!? 20.Qf3 Ng4 21.Kg1 Ne3 22.Qe3 Bf4–+) 20.fg5–/+ Bh3 21.gf6 gf6 22.gh3 Rag8 23.Nc4 Rg6 24.de5 (24.c3!?–/+) 24...fe5–+ 25.Bf2 Rhg8 26.Ne3 Kf8 27.Bh4?? (27.c4 Qb7 28.Nd5 Rg2 29.Kh1 Qc8–+) 27...Qc3 (better is 27...Qc5 28.Bc4 Qe3 29.Rf7 Ke8 30.Re7 Kd8 31.Rg7 Kc8 32.Be6 Kb8 33.Rg8 Rg8–+) 28.Rce1 Qd4?? (better is 28...Qa5 29.a4 a6–/+) 29.Be7!+/– Ke7 30.Nf5 Kf8 31.Nd4 Rg2 32.Kh1 ed4 33.Re2 R2g3 34.Bd7 (34.Kh2!? Rc3 35.a4+–) 34...Ke7+= 35.Bg4 h5 (better is 35...Ra3 36.Ref2 Rg7+=) 36.Rf3?? (better is 36.Kh2 Ra3 37.Bh5+–) 36...R8g4–+ 37.hg4 Rf3 38.gh5 Ra3 39.Rh2 Kf8 (39...Ra1 40.Kg2 d3 41.Kf3–+) 40.Kg2? (40.h6 Re3 41.Kg1 Kg8 (41...Re4? 42.h7 Rg4 43.Kf1+–) 42.h7 Kh8–+) 40...Re3 (better is 40...d3!? 41.Rh1 dc2 42.Rc1–+) 41.Kf2 Kg7 42.h6 Kh7 43.Rh5 (43.Rh4 Rc3–+) 43...Re4 44.Rf5 Re7 (44...Kh6?! 45.Rf7 a5 46.Rf6 Kg5 47.Rd6–+) 45.Rf6 Rc7 46.Ke1 Kg8 (46...b5!? 47.Kd1–+) 47.Kd2 Rd7 48.Kd3 Kf8 49.Rf4 Rd8 50.Kd4 Ke7 51.Kd5 Rc8 (51...Rh8 52.Ra4 a5 53.Rh4–+) 52.Re4 (52.Rh4 Rh8–+ (52...Rc2 53.h7 Rc5 54.Kd4+/–)) 52...Kd7 (52...Kf6!? 53.Rf4 Kg6 54.h7–+) 53.Rh4 Rh8 (53...Rc2 54.h7 Rd2 55.Ke4 Re2 56.Kd3+/–) 54.Rf4 (54.h7!?–/+) 54...Ke7–+ 55.Ra4 a5 (55...Rh6?! 56.Ra7 Kf8 57.Ra6–/+) 56.Rh4 f5 57.Kc6 Kf6 58.h7 Kg5 59.Rh1 f4 60.Kb6 f3 61.Ka5 Kf4 62.Kb5?? (62.Rh6 f2 63.Rf6 Ke3 64.Re6 Kf3 65.Rf6 Kg2 66.Rg6 Kf1+=) 62...Ke3?? (better is 62...f2 63.Ra1 Rh7–+) 63.Rh6 f2 64.Re6 Kf3 65.Rf6 Ke2 66.Re6 Kf1 67.Rh6 ½–½. Odler,Daniel (2010) – Kebis,Milos (2020), Novy Memorial 7th, 1989. (=1.a3 c5 2.b4 e6 3.bc5 Bc5 4.d4 Be7)

5.e4 Nf6 6.e5+= Nd5 7.c4 Nb6 8.c5 Nd5 9.Nf3 (9.Qg4!? g6 10.Bc4+=) 9...b6= 10.cb6 Qb6 11.Bc4 Bb7 12.Bd5 (12.Nbd2!?+=) 12...Bd5= 13.0-0 Nc6 14.Be3 0-0 (14...Qb2 15.Nbd2+=) 15.Nc3= d6 (15...Bf3 16.Qf3 f6 17.ef6 Bf6 18.Qd1=) 16.Rb1 (16.Nd5 ed5 17.Qd3 de5 18.de5 Qa5+=) 16...Qa5= 17.Nd5 ed5 18.ed6 Bd6 19.a4 Rab8 20.Rb8 Rb8 21.Qc1 (21.Ng5!? g6 22.Qf3=) 21...Qa4–/+ 22.g3 (22.Bf4 Bf4 23.Qf4 Re8–/+) 22...a5 23.Rd1 (23.Bf4 Rb3–/+) 23...h6 24.Kg2 Qb5 25.h4 (25.Bf4!? Rd8 26.Bd6 Rd6 27.Qc5–/+) 25...a4 26.Qa1 (26.Bf4 Bf4 27.Qf4 a3–+) 26...a3 27.Nd2 Qb2 28.Rb1 Qa1 29.Ra1 Rb2 30.Kf1? (30.Nb1 a2 31.Nc3–+) 30...a2 31.Kg2 Nb4 32.Ra2 Ra2 33.Nb3 Nc2 34.Bc1 Ba3 35.Ba3 Ra3 36.Nc5 Nd4 37.Nd7 Nc6 38.Nc5 d4 39.Ne4 d3 40.Nd2 Ra2 41.Nb3 d2 (41...d2 42.Nd2 Rd2–+) 0–1. pillsbury (2065) – pushtiu (2125), net–chess.com, 2013.

5.e4 Nf6 6.e5+= Nd5 7.c4 Nb6 8.Nf3 d6 9.ed6 Bf6 10.Nc3 a6 11.Ne4 0-0 12.Nf6 Qf6 13.Bg5 Qf5 14.Bd3 Qa5 15.Bd2 Qa4 16.Qa4 Na4 17.c5 f6 18.Rb1 Ra7 19.Rb4 Bd7 20.Bc2 Nc5 21.dc5 Nc6 22.Rh4 g6 23.0-0 Rf7 24.Bb3 Ra8 25.Re4 Re8 26.Rfe1 e5 27.Bf7 Kf7 28.R4e3 1–0. Creatchy – Bazza3, ChessWorld.net, 2005.

3.e4 a5 4.ba5 Qa5 5.Nf3 Be7 6.Bb2 Nf6 7.Nc3 d5 8.e5 Nfd7 9.Bd3 Nc5 10.Be2 0-0 11.0-0 Nbd7 12.d4 Na4 13.Na4 Qa4 14.Qd2 (14.Qd3 b6=) 14...b6+= 15.Ne1 Ba6 16.Nd3 c5 17.c3 Rfc8 18.Rfc1 Rc7 19.Bd1 Qb5 ½–½. Pruesse,Horst (1910) – Rosin,Ralf (1685), Mecklenburg VP LL, 2003. (=1.a3 e6 2.b4 c6)

3.e4= d5 4.e5 a5 5.b5 Bd7 6.bc6 bc6 7.Nf3 c5 8.Be2 Nc6 9.c3 Nge7 10.0-0 Nf5 11.c4 Qc7 (11...Nfd4 12.Nd4 Nd4 13.Nc3=) 12.cd5 ed5 13.Nc3 Be6 14.Qa4 Qd7 15.Bb5 Rc8 16.Bc6 Qc6 17.Qa5 Be7 18.Nb5 Bd8 (18...0-0 19.a4=) 19.Qa4 0-0 20.Nc3 d4 21.Qc6 Rc6 22.Ne4 Bd5 23.Re1 Ba5 24.Rb1 Ra8 25.Rb5 Attacks the backward pawn on c5 25...Bb6 (25...d3 26.Kf1+= (26.Nc5 Bf3 27.e6 Nd6 28.Ra5 Ra5–+)) 26.d3+/– c4?? (better is 26...Kf8+/–) 27.Rd5+– cd3 28.Nd6 Ne7 29.Rb5 Bc5 (29...Ng6 30.Nf5+–) 30.Rb7 Ng6 31.Nf7 Ba3 (31...Re6 32.N7g5 Rea6 33.h4+–) 32.Ba3 Ra3 33.Nd6 (33.Nd4 d2 34.Rbb1 Rb6+=) 33...Rac3 34.Rb8 Nf8 35.e6 Rd6 36.e7 Rf6 37.e8Q 1–0. pozarski (1985) – NN, GameColony.com, 2002.

3.Bb2 (--> 2.Bb2 c6 3.a3).

3.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 c6).

3.Bb2 Nf6 4.c4 a5 5.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 a5 4.b5 c6 5.c4).

3.Bb2 (--> 2.Bb2 Nc6 3.a3).

3.Bb2 b6 4.Nf3 Bb7 5.e3 Nf6 (--> 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Nc6).

3.b5 Na5 4.e3 Nf6 5.Bb2 c6 6.a4 Qb6 7.Ne2 cb5 8.Bd4 Qc6 9.ab5 Qb5? (better is 9...Qc7+=) 10.Nec3+– Qf5 (10...Qc6 11.Ra5 a6 12.Qf3+–) 11.Nb5 Ne4 (11...Nc6 12.Nc7 Kd8 13.Na8 Nd4 14.ed4 Qe4 15.Qe2 Qc2 16.Nc3+–) 12.f3 Nd6 (12...Nc6 13.Nc7 Kd8 14.fe4+–) 13.Nc7 (worse is 13.Ra5 Nb5 14.Bb5 Qg6+–) 13...Ke7 14.Na8 Nb5 (14...b6+–) 15.Ra5 a6 (15...Nd4 16.Rf5 (16.ed4 Qa5 17.Qe2 b5+/–) 16...Nf5 17.c4+–) 16.Bb5 ab5 17.g4 Qd5 18.Nb6 Qc6 19.Ra8 e5 20.Nc8 Ke6 21.Na7 Qa6 22.Re8 Kd6 23.Be5 Kc5 24.d4 Kb6 25.Nc8 Kc6 (25...Ka5 26.Bc7 b6 27.Nd2 Ba3 28.Nb3 Ka4 29.Rh8 Bb2 30.c3 Ka3 31.Nd2 Qa4 32.Bd6 b4 33.Nc4 Ka2 34.Qa4 Ba3 35.Qc2 Ka1 36.0-0 Bc1 37.Rc1) 26.d5 Kc5 27.Qd4 1–0. Taulien,Hans_Juergen (2350) – Grimm,Manfred (1915), remoteschach.de, 2003.

3.c3 Nge7 4.e3 g6 5.Nf3 Bg7 6.Bb2 0-0 7.Be2 Re8 8.d4 d5 9.0-0 Bd7 10.Nbd2 Qc8 11.c4 dc4 12.Nc4 a6 13.Rc1 b5 14.Re1?? (better is 14.Nce5+/–) 14...bc4–/+ 15.Bc4 Nd5 16.e4 Ncb4 (better is 16...Nb6!?–/+) 17.ab4= Nb4 18.Qb3 Rb8 19.Ba3 Nd5 20.Qa2 e5?? (better is 20...Nb6=) 21.ed5 (21.Bd5!? Be6 22.Ne5 Rb5+–) 21...ed4 22.Re8 Qe8 23.Nd4?? Bd4= 24.Rd1 Bg7 25.Bb2?? Bb2 26.Rb1 Bg7 27.Rb8 Qb8 28.Ba6 Qc8 29.Bc8+– Bc8 30.Qa8 (30.Qa8 Be5 31.Qc8 Kg7 32.Qe8+–) 1–0. Fournier,Frederic (1925) – pacoses (1625), Active Blind, 2008.

3.d3 b5!?+=.

3.d3 Nd4 4.e3= Nb5 5.Bb2 d5 6.g4 (6.Nd2 Nf6+=) 6...Nf6 (6...h5 7.gh5 Nf6 8.Nf3=) 7.g5 Ng8 8.Bh3 (better is 8.c4!? dc4 9.dc4 Qd1 10.Kd1+=) 8...Qg5–/+ 9.Nf3 Qd8 (9...Qh6 10.Bg2 Nd6 11.c4–/+) 10.a4 (better is 10.Nc3 a6 11.Rg1=) 10...Bb4?? (better is 10...Nd6+=) 11.c3 (11.Ke2 e5 12.Bc8 Qc8+–) 11...Qf6 (better is 11...Nc3 12.Bc3 c5+/–) 12.cb4?? (better is 12.ab5 Bd6 13.Nbd2+–) 12...Qb2–+ 13.Ne5?? Nc3 14.Qf3 Qc1 15.Qd1 Qd1 0–1. Rohn,Kat (2000) – Ch,Da (1950), remoteschach.de, 2009.

3.e3 a6 4.Bb2 Nf6 5.c4 b6 6.Nf3 Bb7 7.d4 Nb4? (better is 7...d5!?+=) 8.ab4+/– Bb4 9.Bc3 Be7 10.Nbd2 0-0 11.Bd3 d6 12.Qc2 h6 13.0-0 Nd7 14.e4 a5 15.Rfb1 Bg5 16.Ng5 Qg5 17.Ba5?? (better is 17.Nf3 Qh5 18.Qa4+–) 17...Ra5= 18.Ra5 Qa5 19.Nf3 f5 20.h3 fe4 21.Be4 Be4 22.Qe4 Qf5 23.Qe1 Qd3?? 24.Rc1 Qg6 25.Kh2 Qf6 26.Rc3 c5 27.Re3 Kf7 28.Nd2 Qd4–+ 29.Re6? Ne5 30.Nf3 Qf4 31.Kg1 Ke6 32.Ne5 Qe5 33.Qb1 Qe2 34.Qg6 Ke5 35.Qg7?? Rf6 36.f4 Ke6 37.Qg8 Kd7 38.Qd5 Qe3 39.Kh1 Qc1 40.Kh2 Qf4 41.Kh1 Kc7 42.Qa8 Qc4 43.Qa7 Kc6 44.Qa8 Kb5 45.Qe8 Kb4 46.Qe1 Qc3 47.Qh4 c4 48.Qe4 Rf1 49.Kh2 Qe5 (49...Qe5 50.Qe5 de5 51.g3 c3 52.Kg2 Rf6 53.Kg1 c2 54.g4 c1Q 55.Kh2 Qd2 56.Kg1 Rc6 57.g5 Rc1) 0–1. phil west – alignment, ChessWorld.net, 2011.

3.c4 c6 4.d4 Be7 5.e3 Nf6 6.Nf3 0-0 7.c5 b6 8.Bd3 bc5 9.bc5 Ba6 10.0-0 Bd3 11.Qd3 a5 12.Nc3 a4 13.Bd2+= Na6 14.Rab1 Nc7 15.Rb6 Qd7 16.Rfb1 Nfe8? 17.Ne5 Qd8 18.Nc6 Qd7 19.Ne7 Qe7 20.Nb5 Na6 21.Nd6 Nf6 22.Ra6 Ra6 23.Qa6 (23.Qa6 Ne8 24.Rb7+–) 1–0. alarmimherz1 – abc1 (1845), Live Game Caissa's Web, 2006.

3.c4 Nf6 4.cd5 ed5 5.Bb2 Bf5 6.e3 Bb1 (6...a5 7.Qf3 Be4 8.Bf6 gf6 9.Qe2 ab4 10.Qb5 c6 11.Qb7-/+) 7.Qb1 Nc6 (7...Bd6 8.Nf3=) 8.Bd3 Ne4 (8...Bd6 9.Nf3+=) 9.Nf3 (9.Be4 de4 10.Qe4 Qe7 11.Qe7 Ne7+/-) 9...Be7 (9...Ng5 10.Ng5 Qg5 11.0-0+/-) 10.0-0 (10.b5 Na5 11.Be4 de4 12.Qe4 0-0+/-) 10...Nf2?? (better 10...Bf6+/-) 11.Rf2+-. tiltttaaja190 (1735) - opperwezen (2645), Crazyhouse Madness, lichess.org, 2016.

3.d4 b5 4.Nc3 (4.e4 c6=) 4...a5 5.Bb2 (better is 5.Bf4!?=) 5...ab4–/+ 6.ab4 (6.Nb5? c6 7.ab4 Ra1 8.Ba1 cb5–+) 6...Ra1 7.Qa1 Bb4 8.h3 (8.e3 c6–/+) 8...c6 (8...c5 9.e3 c4 10.Nf3–/+) 9.Nf3 Nf6 10.e3 0-0 (10...Bd6 11.Bd3–/+) 11.Bd3 Qb6 (11...Qe7 12.0-0–/+) 12.0-0 Ba6 (12...Nbd7 13.Rb1–/+) 13.Ne2 (13.Qa2 Nbd7–/+) 13...Nbd7 (13...Bd6 14.Ne5–/+) 14.c3 (14.Ba3!? Ba3 15.Qa3+=) 14...Bd6–/+ 15.Ng3 (15.Qa2 Ra8–/+) 15...Ra8–+ 16.Qb1 g6 (16...b4 17.cb4 Qb4 18.Ba6 Ra6 19.Ne5–+) 17.e4 (17.Qc2 c5–/+) 17...de4 (17...Bg3 18.fg3 b4 19.Ba6 Ra6 20.e5–+) 18.Ne4–/+ Ne4 19.Be4 f5 (19...Bb7 20.Bc1–/+) 20.Qa2 (20.Bd3 c5–/+) 20...Nf8 (20...Re8 21.Bc2–/+) 21.Bc2 (21.Bd3 c5 22.Qb3 Bb7–/+) 21...Bb7 (21...c5 22.Qb1–/+) 22.Qb3 c5 23.c4 b4 24.Rc1 (24.Rd1 cd4 25.Nd4 Qc5–/+) 24...cd4 (24...Qa7 25.Bd1–/+) 25.Bd4 Qc7 (better is 25...Bc5 26.Qe3 Ra5–/+) 26.Be5?? (26.c5 Bc5 27.Bf5 gf5 28.Rc5 Ra1 29.Ba1 Qc5+=) 26...Ra3 (26...Be5 27.Ne5 Qe5 28.Qb4–+) 27.Qb2? (27.Qb4 Bb4 28.Bc7 Bf3 29.Rb1–+) 27...Bf3–+ 28.Bd6 Qd6 29.gf3 (29.Rb1 Bg2 30.Kg2 Qc6 31.Kh2 Qc4–+) 29...Rf3 30.Kg2 (30.Rd1 Qf4 31.Qd4 Qd4 32.Rd4–+) 30...Qc6 (30...Qc6 31.Ba4 Qa8–+ (31...Qa4?! 32.Kf3 Nd7 33.Kg2=)) 0–1. Petersen – Suess,Stefan, corr, 1986.

3.d4 b6 4.Bf4 Nf6 5.e3 c5 6.c3 Bd6 (6...Be7 7.Nf3=) 7.Bb5+= Bd7 8.Bd6 Bb5 9.bc5 bc5 10.Bc5 Ne4 11.a4 Bc4 12.Ba3 Qg5 13.Qf3 Bd3 (13...Nc6 14.Nh3 Qh4 15.Nd2 Nd2 16.Kd2=) 14.Nh3 Qh4 15.Nf4 Bb1 (15...Bc2!?+=) 16.Rb1+/– Nc3? (better is 16...Nc6+/–) 17.Rc1+– Nd7 18.Rc3 Rb8 (18...Qf6 19.Rc6 Qf5 20.Qg3+–) 19.0-0 Nb6 (19...a5 20.Bd6 Rd8 21.Rfc1+–) 20.Rc7 Nd7 21.Rfc1 Qd8 22.h3 (22.Qh3 Nf8 23.Qh5 Qf6 24.Rc8 Rc8 25.Rc8 Kd7 26.Rf8 Rf8 27.Bf8 Ke8+–) 22...g6 (22...Rb1 23.Rb1 Qc7+–) 23.Nd5! ed5 (23...f5 24.Qg3 f4 25.Qg4+–) 24.Qd5 (24.Qd5 Qc7 25.Rc7 Rb1 26.Kh2 Rh1 27.Kh1 Nb6 28.Qf7 Kd8 29.Qe7) 1–0. Nguyen Tran Quang,Minh – Dang The Nam, VIE–chT, 2003.

3.d4 Nc6 4.Nf3 Nf6 5.Qd3 g6 6.Nbd2 Bd6 7.b5 Ne7 8.Bb2 0-0 9.e3 a6 10.c4 Nf5 11.c5 Be7 12.a4 a5 13.Be2 c6 14.0-0 h6 15.Qc3 b6 16.bc6 Qc7 17.Bb5 g5 18.h3 h5 19.Ng5 Ne4 20.Nge4 Ba6 21.Ng3 Ng3 22.fg3 Qg3 23.cb6 Bd6 24.Rf3 Qg5 25.Ba6 Ra6 26.c7 Rb6 27.c8Q Rc8 28.Qc8 Kg7 29.Ba3 Ba3 30.Qc7 Rb2 31.Qf7 Kh6 32.Rf6 Qf6 33.Qf6 Kh7 34.Rc1 Rb7 35.Rc8 Rg7 36.Nf3 Rg6 37.Rh8 1–0. peonsetima – jiena, gameknot.com, 2018.

3.d4 g6 4.Bb2 Bg7 5.Nf3 Nd7 6.e3 c6 7.c4 Ne7 8.c5 b6= 9.h3 0-0 10.Bd3 Nf5 11.Bf5 ef5= 12.0-0 Ba6 13.Re1 bc5 14.Bc3 Re8 15.bc5 Nf6 16.Qa4 Bb5 17.Qc2 Ne4 18.a4 Bc4 19.Nfd2 Nd2 20.Nd2= Ba6 21.Nf3 Qd7 22.Rab1 Bf6 23.Qd2 Bc4 24.Rb4 a5 25.Rb6 Kg7 26.Ba5 h5 27.Ra1 f4 28.ef4 Bd8 29.Ne5 Qa7?? 30.Nc6+– Qd7 31.Ne5 Qf5 32.Nc4 Bb6?? 33.Nb6 Ra7 34.Bb4 Re4 35.c6 Rf4 36.a5 Qf6 37.Bc5 Re4 38.Nd5 Qc6 39.Nb4 Qe6 40.Ba7 Qe7 41.Bc5 Qd7 42.a6 f6 43.a7 (43.a7 Re8 44.a8Q Ra8 45.Ra8+–) 1–0. pillsbury (1910) – rprado, net–chess.com, 2007.

3.e3 Bd7 4.c4 dc4 5.Bc4 a6 6.Bb2 Nc6 7.Nc3 Nf6 8.Nf3 Bd6 9.Qc2 h6 10.0-0-0 b5=+ 11.Bb3 Qb8 12.d4 a5 13.Na2? ab4–/+ 14.ab4 Bb4 15.Nb4? Nb4–/+ 16.Qc5 Na2 17.Kb1 Ne4?? 18.Qc2+/– Qa7 19.Qe4+– 0-0 20.Ne5 Be8 21.Qa8 Qa8= 22.Ba2 Qg2 23.f3 b4 24.Bc4 Ba4–/+ 25.Rc1 b3?? 26.Rhg1 Qh2 27.Rh1 Qd2 28.e4 Ra8 29.d5 ed5 30.Bd5+= Rf8? 31.Rhg1 Bb5+/– 32.Rg7! Kg7 33.Nc4 Kh7?? 34.Nd2 1–0. mgriffin – jhforry (1620), net–chess.com, 2001.

3.e3 Ne7 4.c4 Ng6 5.Bb2 f6 6.d4 Be7 7.Bd3 dc4 8.Bc4 e5 9.h3 a6 10.Nc3 b5 11.Ba2 Qd6 12.Ne4 Qb6 13.de5+/– Ne5 14.Rc1 a5 15.Bd4 Qb7 16.Qc2?? f5?? 17.Qc7 Nd3–+ 18.Kd2 Nc1 19.Qb7?! Bb7 20.Nc5 Na2 (20...Na2 21.Nb7 ab4–+) 0–1. mgriffin (1630) – eduardobandeira, net–chess.com, 2001.

3.e3 Qf6 4.Nc3 c6 5.Nf3 Bd6 6.d4 Ne7 7.Bd3 0-0 8.0-0 b5 (8...Nf5 9.Be2=) 9.Re1 (9.e4 Bf4+/–) 9...a5 10.e4 ab4?? (better is 10...Bf4+=) 11.Nb1 (better is 11.e5 bc3 12.ef6 gf6 13.Re2+–) 11...de4–/+ 12.Be4 h6 13.a4? (better is 13.Bb2!?–/+) 13...ba4–+ 14.Bd2 Nd5 15.Bd5? (better is 15.c4 bc3! 16.Bc3–+) 15...ed5 16.Ra2 Bg4 17.h3 Bf3 18.Qf3 Qd4 19.c3 Qc4 20.Ra1 b3 21.g3 (21.Na3 Qh4 22.c4 Ba3 23.Ra3 Qc4 24.Qg3–+) 21...b2 22.Na3 Qb3 23.Rab1 Qa3 24.Qg4 f5 25.Qe2 Qb3 26.Qe6 Kh7 27.Qd6 Rf6 28.Qe5 Nd7 29.Qd4 a3 30.Qb4 Qc2 31.Red1 a2 32.Qb2 Qb2 33.Rb2 a1Q 34.Ra1 Ra1 35.Kg2 Ne5 36.h4 Nc4 37.Rc2 Nd2 38.Rd2 g5 39.hg5 hg5 40.f3 Rh6 41.Re2 Rhh1 42.f4 g4 43.Re7 Kg8 44.Re6 Rhc1 45.Rc6 Rc2 0–1. pieeater – Kmiroslav, ChessWorld.net, 2013.

3.e4 c6 4.c4 (4.e5 a5=) 4...Nf6 (4...de4 5.d4 Nf6–/+) 5.Nf3?? (5.e5 Nfd7 6.d4 dc4 7.Bc4 a5=) 5...Be7?? (better is 5...de4!? 6.Ng5 h6–+) 6.ed5 cd5 7.Bb2 Nc6 8.c5 0-0 9.Bf6 Bf6–/+ 10.Ra2 e5 11.b5 Nd4 12.Nc3 Nf3 13.Qf3–/+ e4 14.Qh5 g6?? 15.Qe2?? Bf5 16.Na4 d4 17.h3 d3 18.Qe3 Bd4 19.Qh6 Re8 20.g4 Be6 21.Qf4 Ba2 22.b6 a6 23.Bg2 Bd5 24.0-0 Be5 25.Qe3 Rc8 26.Be4 Be4 27.f4 Bd4 0–1. Eries – pieeater, ChessWorld.net, 2012.

3.e4 de4 4.Nc3–/+.

3.g3 a5 4.Nf3 ab4-/+ 5.Bg2 ba3 6.Ba3 Ba3 7.Na3 Ra3?? (better 7...Nf6-/+) 8.Ra3+/- Nc6 9.Bh3 (9.0-0 Nf6+/-) 9...e5 (9...Nf6 10.0-0+/-) 10.Bg2 (better 10.Ra8!? Nge7 11.Bc8 Nc8 12.Qb1+/-) 10...Nf6 11.Rg1. aheadotg (2245) - unjournakamura (2465), Rated Crazyhouse game, lichess.org, 2020.

3.g3 e5 4.Nf3 Bd6 5.d4=+.

3.g3 f5 4.Bg2 Nf6 5.Nf3 Be7 6.0-0 0-0 7.d3 c5 8.bc5 Bc5 9.Nbd2 Nc6 10.c4 dc4 11.Nc4 Nd5 12.Bg5 Qe8 13.d4 Nc3 14.Qd3 Nd4 15.Nd4 Bd4 16.e3 Ne2 (better is 16...Ne4 17.ed4 Ng5=) 17.Qe2+/– Ba1 18.Ra1 e5 19.Nd6 Qd7 20.Rd1 h6 (20...Qc7+–) 21.Nb7!! Qa4 (21...Qb7 22.Bb7) 22.Be7 (22.Nc5 Qa3 23.Qc4 Kh7 24.Ba8 hg5+–) 22...Re8 23.Nc5 Qa3 (23...Qg4 24.Qg4 fg4 25.Ba8 Re7 26.Rd8 Kf7 27.Rc8 Kf6+–) 24.Ba8 Re7 25.Rd8 (25...Kh7 26.Rc8 Qa1 27.Kg2+–) 1–0. Eklund,Lars_Goran – Hogberg,Jan, Boras, 1988.

3.Bb2 (--> 1.b4 d5 2.Bb2 e6 3.a3).

3.Bb2 a5 4.b5 Nf6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5).

3.Bb2 c5 4.e3 (--> 1.b4 d5 2.Bb2 e6 3.e3 c5 4.a3).

3.Bb2 c6 4.Nf3 f5 5.e3 Nf6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 c6).

3.Bb2 d4 4.Nf3 (--> 1.b4 d5 2.Bb2 d4 3.Nf3 e6 4.a3).

(--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5).

4.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3).

4.e3 c5 5.bc5 Bc5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5).

4.e3 c5 5.bc5 Bc5 6.d4 Be7 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 c5 5.bc5 Bc5 6.d4 Be7 7.e3).

4.e3 Nbd7 5.c4 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 e6 5.a3 Nbd7).

4.e3 Nbd7 5.c4 c6 6.Nf3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.e3 Be7 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3).

4.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3).

4.Nf3 c5 5.bc5 Bc5 6.d4 Bd6 7.e3 0-0 8.Nbd2 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.d4 Bd6 8.Nbd2 0-0).

4.Nf3 c5 5.bc5 Bc5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3).

4.Nf3 Bd6 5.e3 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6).

4.Nf3 Be7 5.e3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 Be7).

4.ba5 Ra5 5.Bd2 Ra8 6.e3 c6 7.c4= dc4 8.Bc4 b5 9.Bd3 Ba6 10.Bb4+= Bb4 11.ab4 Nf6 12.Nf3 0-0 13.0-0 Nbd7 14.Nbd2 g6 15.Qc2 Qc8 16.Ng5 Ra7 17.Nde4 Ne4 18.Ne4 Qa8 19.Nc5 Nc5 20.dc5 Bc8 21.Qc3 Rd8 22.h4 Rd3? 23.Qd3+– Ra1 24.Qd8 Kg7 25.Qd4 f6 26.Ra1 Qb7 27.Qd6 e5 28.Rd1 Kh6 29.Qf8 Qg7 30.Qc8 f5 31.Qd8 e4 32.Qg5# 1–0. rla – kos88, internet, 2007.

4.b5= c5 5.e3 Nf6 6.Nf3 Bd6 7.dc5 Bc5 8.Bb2 (8.Bd3 0-0=) 8...0-0 9.Bd3 b6 10.0-0 (10.Nbd2 Nbd7=) 10...Nbd7 11.c4 (11.Ne5 Ne5 12.Be5 Bd6 13.Bd6 Qd6=) 11...Bb7 (11...dc4 12.Bc4 Bb7 13.Qe2=) 12.cd5 White begins to deal mighty blows 12...Bd5 13.Nbd2 Rc8 14.e4 Bb7 15.Qe2 White prepares e5 15...Qc7 16.e5 Nd5 (16...Nh5 17.g3=) 17.Qe4 Threatening mate: Qxh7 17...a4?? (17...N5f6 18.Qh4 Ne5 19.Be5 Qd8+–) 18.Qh7 1–0. Perico,Antonio – Jacquelin,Xavier, IECG, 2001.

4.b5= c5 5.Bf4 Bd7 6.e3 c4=.

4.b5= Nf6 5.Nf3=.

4.c3 b5 5.Nf3 Nf6 6.Bg5 Be7 7.e3= ab4 8.Bb5 Bd7 9.Bd7 Nbd7 10.Qb3 c5 11.cb4= c4 12.Qb2+= h6 13.Bf4 Nh5 14.0-0 g5 15.Be5 f6 16.Bg3 Ng3 17.fg3 g4 18.Nh4 f5 19.Ng6 Rg8 20.Nf4 Kf7 21.Nc3 Nb6 22.Qc2 Qd7 23.Nce2 Rh8 24.Nh5 Bg5 25.Nef4+/– Ra7 26.Ra2 Rc8 27.h3 gh3+= 28.gh3 Qa4 29.Qb1 c3 30.Ne6?? Ke6?? (better is 30...Be3 31.Kh2 c2–+). ismaelarango (1645) – super knight, internet, 2005.

4.e3 a5 5.b5=.

3.e3 a6 4.Nf3 b5 5.Bd3 c5 6.bc5 Bc5 7.0-0 Nf6 8.Re1 Ng4 9.Nc3 Qf6 10.Bb2 Qh6 11.Ne2 Bb7 12.c3 (12.a4 b4=) 12...Bd6 Now all is on h2 (12...Nc6 13.h3 Nce5 14.Ne5 Ne5 15.Bc2+=) 13.g3 (13.h3 Ne5 14.Ne5 Be5+=) 13...Ne5 (better is 13...e5!? 14.Bf5 Qh3–/+) 14.Ne5= Be5 15.Bc2 0-0 16.d4 Bf6 17.Bc1 Bg5 18.Nf4 Nd7 19.Qf3 Bf4 20.ef4 Qf6 21.Be3 Rac8 22.Bd2 h6 23.Qg4 g6 24.Rab1 Nb6 25.Re5 (better is 25.f5!? ef5 26.Qf4+=) 25...Nc4–/+ 26.Re2 h5 27.Qf3 Na3 (27...Nd2?! 28.Rd2 Rc4 29.Rd3=) 28.Rb2 Nc4 29.Rb1 Rfe8 30.Kg2 Kg7 31.h3 Rc6 32.g4 Rh8 33.g5 Qe7 34.Be3 Rb6 35.h4 Rc8 36.Kg3 f6 37.gf6 Qf6 38.Qg2 (38.Bc1 Nd6–+) 38...Rf8 (better is 38...Rbc6–+) 39.Bd2? (better is 39.Rg1 Nd6 40.Bd2–+) 39...Nd2 40.Rd2 Bc8 41.f3?? Bd7 42.Re2 Qf4 43.Kf2 Qh4 44.Kf1 Qf6 45.Rf2? Qf4 46.Qg6 Kh8 47.Qh7 1–0. pieeater – 488, ChessWorld.net, 2013.

4.e3 Nc6 5.Bb5 a6 6.Bd3 (6.Bc6 bc6 7.c4 dc4=) 6...Nf6 7.Nf3 0-0 (7...e5 8.de5 Ne5 9.Bb2 Nd3 10.Qd3=) 8.h3 (8.Bb2 Bd7=) 8...b5 9.g4 (9.Bb2 Ne4=) 9...a5 (9...e5 10.de5 Ne5 11.Bb2 Nd3 12.Qd3–/+) 10.c3 (10.Bb5 Na7 11.Ba4 ab4 12.ab4 Bb4 13.Bd2 Bd2 14.Nbd2 Bd7=) 10...ab4 11.Qc2 (11.Bb5 Bd7–/+) 11...ba3–/+ 12.Bb5 a2 13.Nbd2 Ra5?? (better is 13...Bd7–/+) 14.Bc6+– Ne4 (14...Bd7 15.Bd7 Qd7 16.Ra2 Ra2 17.Qa2+–) 15.0-0 (15.Ne4 de4 16.Be4 f5 17.gf5 ef5 18.Qb3 Kh8+–) 15...Ba6 (15...f5 16.Ra2 Nd2 17.Bd2 Ra2 18.Qa2 fg4+/–) 16.g5?? (16.c4 f5 17.Ra2 Ra2 18.Qa2 fg4 A) 19.Qa6 gf3 20.Nf3 Qf6+= (20...Rf3?! 21.Qa8 Qa8 22.Ba8=); B) 19.Ne5 Nd2 20.Bd2 gh3 21.f4+/–) 16...Ng5 (better is 16...Bf1 17.Kf1 Ng5=) 17.Nh4?? (better is 17.Re1=) 17...Nh3–+ 18.Kg2 Qh4 19.f4 Bf1 20.Kf1 (20.Nf1 Qg4 21.Ng3–+) 20…Qf2# 0–1. Pekin Dragons – WirralBoy, ChessWorld.net, 2013.

(--> 1.b4 Nf6 2.d4 e6 3.a3 d5).

4.e3 Bd6 5.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Bd6 5.d4).

4.Nf3 (--> 2.a3 Nf6 3.Nf3 d5 4.d4).

4.Bb2 ab4 5.Nf3 (5.ab4 Ra1 6.Ba1 Nf6+= (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–)) 5...ba3 6.Na3 Nf6 7.Bd3 Bb4 8.Nb5 Ra1 9.Qa1 0-0 (better is 9...Na6!?+=) 10.Bf6= Qf6 11.Qf6 gf6 12.Nc7 Na6 13.c3 Ba5 14.Na6 ba6 15.Ke2 Bb7 16.Ra1 Bc7 17.Ra4 Attacking the isolated pawn on a6 (worse is 17.Ba6 Ra8 18.Bb7 Ra1+=) 17...Ra8 18.Rg4 Kh8 19.Rh4 d4 (better is 19...f5!? 20.Ng5 Kg8 21.Nf7 Ra7+/–) 20.Bh7 Bf3 21.Kf3 Kg7 22.Be4 (22.ed4 Rh8–/+; 22.cd4 Rh8–/+) 22...dc3?? (better is 22...Rb8 23.ed4 f5+–) 23.Ba8 1–0. pierre – NN, internet, 2006.

4.b5 Bd6 5.Nf3 Nf6 6.c4 c6 (6...e5 7.cd5 e4 8.Nd4=) 7.d4. Baer,Werner – Hohlstein,Walter, TT–08 TSC, 2003.

4.c3 g6 5.Bb2 Bg7 6.bc5+= Nc6 7.Nf3 Nge7 8.Bb5 0-0 9.d4 b6= 10.cb6 Qb6 11.Bc6 Qb2 12.Ba8 Qa1 13.Qb3?? Ba6–+ 14.Nfd2 Ra8 15.f3 Bf8 16.Kf2 Bc4! 17.Nc4 dc4 18.Qb7? Rc8 19.Qa7?? Qa2 20.Kg3 Nf5 21.Kf4 Qg2 22.e4 Qh1 23.ef5 Qb1 24.fe6 Qf5 25.Kg3–+ Qe6 26.a4 Bd6 27.Kg2 Qe2 28.Kh3 Qh2 29.Kg4 h5 30.Kg5 Qf4# 0–1. euforia (1605) – chessnutz, internet, 2007.

4.bc5 Bc5 5.d4 Bd6 6.Bd3 Nf6 7.Nf3 Nc6 8.0-0 0-0 9.c4 dc4 10.Bc4 a6 11.Nc3 b5 12.Bd3 Bb7 13.Ne4 Be7 (13...Ne4!? 14.Be4 Rc8+=) 14.Nf6 Bf6 15.Bb2 Rc8 16.Nd2 Na5 17.Qh5 g6 18.Qe2 Qb6 19.Rac1 Bd5 20.Bc3 Be7 21.Bb4 Bb4 22.Rc8 Rc8 23.ab4 Nc6 24.Rb1 e5 25.Be4 Be4 26.Ne4 ed4 27.Nf6 Kg7 28.Nd5 Qd8 29.Qa2 de3 30.Ne3 Ra8 31.Rd1 Qe7 32.Qa1 Qe5 33.Qa3 Nd4 34.Qa5 Ne2 35.Kf1 Nc3 36.Rd3 Na4 37.Rd8 Rd8 38.Qd8 Nb2 (38...Qh2?! 39.Nf5 gf5 40.Qg5 Kf8 41.Qd8 Kg7 42.Qg5 Kf8 43.Qd8 Kg7=) 39.Nc2 Nc4 40.g3 Qc3 41.Qd4 Qd4 42.Nd4 Nb6 43.Ke2 Nd5 44.Nc2 Kf6 45.f4 Ke6 46.Kd3 h5 47.Ke2 Nf6 48.h3 Nd5 49.h4 (49.Kf3 Nc3 50.g4 Kd5 51.Ne3 Kd4 52.gh5 gh5–+) 49...Ne7 50.Nd4 Kd5 51.Kd3 f6 52.Nb3? (52.Ne2 Nc6 53.Nc3 Ke6 54.Na2–+) 52...Nc6 53.Kc3 (53.Ke3 Kc4 54.Nd2 Kb4–+) 53...Ke4 54.Nc5 Kf3 55.Na6 Kg3 56.Nc7 Kh4 57.f5 (57.Nb5 Nb4! 58.f5 gf5 59.Nd6–+) 57...g5 58.Nb5 (58.Kd2 g4 59.Ke2–+) 58...g4 59.Kd3 g3 60.Nc3 g2 61.Ne2 Nb4 62.Ke3 Kh3 63.Kf3 Kh2 64.Ke4 h4 65.Kd4 g1Q 66.Ng1 Kg1 0–1. capablancaven (1890) – macq (1855), gameknot.com, 2011.

4.bc5 Bc5 5.d4 Bd6 6.Nf3 Nc6 7.c4 Nf6 8.Nbd2 b6 9.cd5 ed5 10.Bb5 Bd7 11.0-0 0-0 12.a4 Qe7 13.Bc6 (13.Qb3 Na5 14.Qd3 Bc8=) 13...Bc6 14.Qb3 Bd7 (14...Qe8 15.a5=) 15.Ba3 Ba3 16.Ra3 Rac8 17.Rfa1 (17.a5 b5=) 17...Rc7 18.a5 b5 19.Ne5 Ne4 20.Ne4 de4 21.Nd7 Qd7 22.Qb1 Rfc8 23.a6 Rc4 24.Rb3 h6 (24...Qc6 25.h3 Rb8 26.Rb4=) 25.h3= f5 26.Qe1 Rb8 27.Rb4 Qc6 28.Rab1 Rb6 (28...Rb4 29.Qb4 Qa6 30.Qc5=) 29.Rc4 (29.Qf1 Rb4 (worse is 29...Ra6 30.Rb5 Qc7 31.Rb7+=) 30.Rb4 Kh7=) 29...bc4+= 30.d5 Qc5 (30...Qf6 31.Rc1=) 31.Rb6 Qb6 32.Qc3 (32.Qd1 Kf7= (worse is 32...Qa6 33.d6 Qa5 34.d7+/–)) 32...Qa6+= 33.Qe5 Qc8 34.d6 Kh7 35.Qe7 Qc5 36.Qc7 Qe5 37.Qe7 Qc5 38.Qc7 Qe5 39.Qe7 Qc5 ½–½. Cirulis,Ilmars (1785) – Stevenson,Wayne (1900), FICGS, 2015.

4.Bb2 f6 5.Nf3 a5 6.b5 cb5 7.Bb5+= Bd7 8.Qe2 Qb6 9.Bd7 Nd7= 10.0-0=. thedesertfox (2170) – tstrickland (2070), net–chess.com, 2004.

4.c4 Nf6 5.cd5 Nd5 6.Bb2 Nd7 7.Nc3 Nc3 8.Bc3 f6 9.Bc4 Nb6= 10.Bb3 c5 11.Nf3 cb4 12.ab4 Nd5 13.Bb2 Nb4=+ 14.0-0 Nd3 15.Bc3 Bd7 16.Ba4 Nc5 17.Bd7=+ Qd7 18.Qc2 Bd6 19.d4 Na6 20.Rfe1 Rc8 21.Qd3 0-0 22.e4 Nb4 23.Bb4 Bb4–/+ 24.Reb1 a5 25.d5 ed5 26.ed5 Rc3 27.Qd1 Rd8–+ 28.Nd4 Qd5 29.Nf3 Qd1 30.Rd1 Rd1 (30...Rd1 31.Rd1 Bc5–+) 0–1. rommeltdf (1780) – bherb, net–chess.com, 2002.

4.Bb2 c5 5.bc5 Bc5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5).

4.Bb2 Be7 5.Nf3 Nbd7 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 Nbd7).

4.c4 Nc6 5.Bb2 b6 6.cd5 Qd5 7.Nc3 Qd8= 8.Bb5 Bb7 9.Nf3 a5 10.Ne5+– Qd6 11.Nc6?? Bc6+= 12.Bc6 Qc6=+ 13.0-0 ab4 14.ab4 Ra1 15.Ba1 Bb4 16.Qa4? Qa4–+ 17.Na4 Bd2 18.Bf6 gf6 19.Rd1 Ba5 20.Kf1 0-0 21.Rd7 c5 22.Rb7 Rc8?? 23.Nb6–/+ Bb6 24.Rb6 c4 25.Rb1 f5 26.Ke2 e5 27.Kd2=+ Kg7 28.Kc3= Kg6 29.Rb4 e4 30.Rc4 Rc4 31.Kc4+/– Kg5 32.Kd4 f6 33.h3 h5 34.g3 h4? 35.Kd5+– hg3 36.fg3 Kh5 37.Ke6 Kg6 38.h4 f4 39.gf4 Kg7 40.Kf5 Kf7 41.h5 Kg7 42.h6! Kf7 43.h7 Kg7 44.h8Q! Kh8 45.Kf6 Kh7 46.Kf5 Kh6 47.Ke4 Kg6 48.Ke5 Kf7 49.f5 Ke7 50.f6 Kf7 51.e4 Kf8 52.Ke6 Ke8 53.e5 Kf8 54.Kd7 Kf7 55.e6 Kf8 56.e7 Kf7 57.e8Q Kf6 58.Kd6 Kf5 59.Qe5 Kg4 60.Ke6 Kf3 61.Kf5 Kf2 62.Qe4 Kf1 63.Kf4 Kf2 64.Qc2 Kf1 65.Kf3 Kg1 66.Qg2 1–0. mgriffin – heyuneverno, net–chess.com, 2001.

4.d3 a5 5.b5 c6 6.d4 (6.Nc3 Bd6+=) 6...Bd6 7.a4 0-0 8.Nf3 Nbd7 9.h3 (9.Ba3 Ba3 10.Na3 Qe7+=) 9...e5 10.Ba3 Qe7 11.Be2 Re8 12.bc6 bc6 13.Bd6 Qd6 14.c4 (14.0-0 Ne4+=) 14...ed4 15.Nd4 Ba6 16.cd5 Be2 17.Qe2 Nd5 18.0-0 Nb4 (better is 18...Ne3 19.fe3 Qd4 20.ed4 Re2–/+) 19.Rc1?? Attacks the isolani on c6 (better is 19.Nc3=) 19...Qd4!!–+ 20.Nc3 (20.ed4 Re2 Pinning (20...Re2 Deflection; 20...Re2 Remove defender)) 20...Qe5 21.Rab1 Nc5 22.Na2 Ncd3 (better is 22...Nbd3 23.Rd1 Rad8 24.Qc2–+) 23.Rc3 (23.Rd1 Nf4! 24.Qc4–+) 23...Na2 24.Rd3 Nb4 (better is 24...Nc3 25.Rc3 Qc3–+) 25.Rd7 Qe4 26.Rc1 Rad8 27.Ra7 (27.Qd2 Rd7 28.Qd7–+) 27...Ra8 28.Ra8?? (28.Rd7 Red8 29.Qd2 Rd7 30.Qd7–+) 28...Ra8–+ 29.Rc4 Qd3 (29...Qb1!? 30.Kh2–+) 30.Qd3 Nd3 31.Rc6 g6 (31...Nb2!? 32.Kf1–+) 32.Rd6 Nb4 33.g4 Kg7 34.h4 (34.Rb6 Rc8 35.Rb5 Rc1 36.Kh2 Nc6–+) 34...Ra6 35.Rd7 Rc6 36.Ra7 Rc5 37.Kg2 Na2 38.Kg3 Nc3 39.f3 Na4 40.e4 Nc3 41.g5 (41.Kf4 a4 42.Ke3 h6–+) 41...a4 42.Kg4 (42.Kf4 Rc4–+) 42...Rb5 43.f4 Rb3 (better is 43...Rb4 44.e5 Nb5 45.Ra5–+) 44.e5 (44.f5 h5 45.gh6 Kh6 46.fg6 fg6 47.Ra6–+) 44...Kg8 (better is 44...Ne2 45.h5 gh5 46.Kh5 Rb4–+) 45.Ra8= Kg7 46.h5?? (46.Ra7 Ne2 47.h5 gh5 48.Kh5–+) 46...gh5 (46...h6 47.hg6 h5 48.Kh5 fg6 49.Kg4–+) 47.Kh5 a3?? (47...Ne4 48.f5 Rh3 49.Kg4 Nf2 50.Kf4 Rb3–+) 48.Ra7?? (better is 48.f5 h6 49.gh6 Kh7 50.Ra7=) 48...Nb5 49.Ra6 (49.Ra8 Nd4–+) 49...Nd4 (49...Rb2!? 50.f5 Rh2 51.Kg4–+) 50.Ra4 Nf5 51.Kg4 (51.Ra7 Kf8 52.Kg4 Nd4–+) 51...Ne3 52.Kh4 (52.Kf3 Nc2 53.Ke2 Kg6–+) 52...Nc2 (better is 52...Kg6 53.Kg3 Nd1 54.Kg2 Nc3 55.Ra6 Kf5–+) 53.f5 (53.Ra7 Kg6 54.Kg4 Ne3 55.Kf3 Nd1 56.Ke2 Nc3 57.Kd2 Nd5–+) 53...Rb2 (better is 53...Rb4 54.Rb4 Nb4–+) 54.e6 fe6 55.fe6?? (55.Ra7 Kf8 56.Ra8 Kf7 57.Ra7 Ke8 58.Ra8 Kd7 59.g6 hg6 60.fg6–+) 55...a2 56.e7 Kf7 57.Re4 (57.g6 hg6 58.e8Q Ke8 59.Kg5–+) 57...Ke8 0–1. pillsbury (2190) – rhand (2570), net–chess.com, 2015.

4.d3 Bd7 5.Bb2 a5 6.Nf3 ab4 7.ab4 Ra1 8.Ba1 Bb4 9.c3 Bd6 10.Be2 c5 11.h3 Qa5 12.Bb2 0-0 13.0-0 Ba4 14.Qc1 b5 15.Qd2 (15.c4 dc4 16.Bf6 gf6–+) 15...Nbd7 16.c4 b4 17.Bd1 Ra8 18.Bf6 Nf6 19.cd5 ed5 20.Ba4 Qa4 21.Rc1 h6 22.Qd1 (22.Nh4 Qb3–+) 22...Qd1 (22...b3!? 23.Qd2–+) 23.Rd1 Kf8 24.Nbd2 Ra3 25.Nb1 Ra2 26.Kf1 Ke7 27.g3 (27.Nbd2 Ra3 28.Ke2 Ke6–+) 27...c4 28.dc4 (28.dc4 dc4 29.Nd4–+). pillsbury (2190) – gambitkumar, net–chess.com, 2015.

4.d4 Nbd7 5.Nf3 c6 (5...Bd6 6.Bd3=) 6.c4 Be7 7.Nbd2 a5 8.b5 0-0 9.Bb2 c5 (9...Rb8 10.c5=) 10.Bd3 b6 (10...cd4 11.Bd4 Bd6 12.cd5 ed5 13.0-0+=) 11.0-0 Bb7 12.cd5 (12.Qc2 dc4 13.Nc4 Bf3 14.gf3 cd4 15.Bd4 Rc8=) 12...Nd5 13.Qc2 f5 14.Bc4 Kh8 (14...N7f6 15.dc5 Bc5 16.Nb3+=) 15.Rfd1 (15.e4 fe4 16.Qe4 Rf6+=) 15...Bd6 (15...Rc8 16.Rac1+=) 16.dc5 (16.e4 fe4 17.Ne4 Be7+=) 16...Nc5 17.Ba2 (17.Rac1 Rc8+=) 17...Qe8= 18.Nc4 Bc7 19.Bd4 Qg6 (19...Qb5 20.Rab1 Qc6 21.Qb2+=) 20.Qe2 (20.Nce5 Qf6 21.Nd7+–) 20...Qh5 21.Nce5 f4 22.e4 Be5 23.Be5 Nf6 24.Bd6 Rfd8 25.Bf4 Nce4 (25...Nfe4 26.Be5+=) 26.Qe3 (26.Be6 Nc5 27.Bc4 Qg4=) 26...Rd1+= 27.Rd1 Re8 28.Be5 (28.Bc7 Qb5 29.Rb1 Qa4 30.Bb6 Bd5 31.Bd5 ed5=) 28...Ng4 29.Qf4 Ne5 (29...Ngf2 30.Rd7 Nf6 31.Bf6 (worse is 31.Rb7 Nd3 32.Qg3 Qh6+–) 31...Nh3 32.gh3 Bf3 33.Bg7 Kg8 34.Be6 Re6 35.Qf8) 30.Qe5 Qe5 31.Ne5 Nc3 32.Rd7 Bd5 (32...Bc8 33.Rd2 Nb5 34.Rd3=) 33.Bc4 Bc4 34.Nc4 Nb5 35.a4 Nc3 36.Nb6 Rb8 37.Kf1 (37.f3 h6 38.Rd6 e5=) 37...Kg8 38.Rd6 Kf7 39.g3 Ne4 (39...Ke7 40.Rd7 Kf6 41.Rd6=) 40.Rc6 Ke7 ½–½. Winiger,Albert (2150) – Haas,Uwe (2110), remoteschach.de, 2004.

4.Nf3 (--> 2.a3 Nf6 3.Nf3 d5 4.e3).

4.Nf3 a6 5.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6 5.Nf3).

4.Nf3 Nbd7 5.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3).

3.Nf3 (--> 1.b4 d5 2.Nf3 e6 3.a3).

(--> 2.a3 Nf6 3.Nf3 d5).

4.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3).

4.Bb2 Nbd7 5.e3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7).

4.e3 Nbd7 5.c4 a5 6.b5 c5 7.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 c5 6.e3 Nbd7 7.c4).

3.Bb2 c5?? 4.Bg7+– f6 5.Bh8 Be5 6.Nc3 cb4 7.ab4 b6 8.Nf3 Bc3 9.dc3 d5 10.e3 Qe7 11.Nd4 e5 12.Nf5! Qe6 13.Ng7 Ke7 14.Ne6 Be6 15.c4! dc4 16.Qf3 Nd7 17.Qa8 Nh6 18.Ra7 Nf5 19.Qc6 Nh6 20.Bc4 Bc4 21.Rd7 Kf8 22.Qc8 1–0. pierre – karlsson, internet, 2010.

3.Bb2 Nc6?? 4.e3?? (better is 4.Bg7 Be5 5.Bh8 Bh8 6.c3+–) 4...Nf6= 5.Nf3 Qe7 6.d4 h6 7.Bd3 a6 (7...e5!? 8.de5 Ne5+=) 8.c4+/– Na7? (8...Qd8 9.e4 Be7 10.e5+/–) 9.Nc3?? (better is 9.c5+–) 9...c6 10.0-0 b6 11.Qc2 Bb7 12.Rfe1 Bc7 13.Rad1 0-0 14.e4 White intends d5 14...d6 15.d5 ed5 16.ed5 Qd7 17.dc6 Bc6 18.Be4 Be4 19.Ne4 (worse is 19.Re4 Ne4 20.Ne4 Rae8+=) 19...Rfe8?? (better is 19...Ne4!? 20.Qe4 Rfe8+–) 20.Nf6 (better is 20.Bf6 Nc6+–) 20...gf6 21.Re8 Re8 22.Qd2 Kf8?? (22...Kg7 23.Bc1 Rh8 24.Qf4+–) 23.Re1 (23.Qh6 Kg8 24.Bf6 Re1 25.Re1 d5 26.Qg7) 23...Re1+– 24.Qe1 Nc6 25.Qc1 (worse is 25.Bf6 Qe6 26.Qc3 Ne5 27.Be5 de5+/–) 25...Ne5 26.Ne5 fe5 27.Be5?? (better is 27.Qh6 Kg8 28.Qd2+–) 27...de5–/+ 28.c5? (28.Qh6 Ke8 29.Qh8 Ke7 30.Qh4 Kd6–/+) 28...bc5 (28...Ke7 29.g3 bc5 30.bc5–+) 29.bc5? (29.Qh6 Ke7 30.Qh4 f6 31.Qh7 Ke6 32.Qh3 f5 33.Qh6 Kd5 34.Qa6 c4–/+) 29...Qd4 (29...Qc6 30.Qe3–+) 30.h3 Bd8 (better is 30...h5–+) 31.Qe3?? (better is 31.Qh6 Ke7 32.Qc6+=) 31...Qe3–+ 32.fe3 Be7 33.Kf2 Bc5 34.Ke2 (34.a4 e4–+) 34...Ba3 0–1. Fournier,Frederic (1940) – Tuertomoderno (1830), Active Blind, 2007.

3.Bb2 Bf4 4.Bg7 d5 5.Bh8 Qf6 6.Bf6 Nf6 7.e3 Be5 8.d4 Bd6 9.c4 dc4 10.Bc4 Nc6 11.Qf3 e5 12.de5 Bb4 13.ab4 Nb4 14.Na3 b5 15.Bb5 Kf8 16.Qf6 c6 17.Qh8 Ke7 18.Qf6 Kf8 19.Bc4 Bd7 20.Qf7 1–0. mgriffin (1870) – buckfast (2500), net–chess.com, 2001.

3.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 Bd6).

3.Bb2 Bf8!?=.

3.Bb2 Qg5 4.Nf3 Qf4?? (better is 4...Qg6+=) 5.Bg7+– (5...Be7 6.e3+–) 1–0. Wall,Bill – Guest7367, internet, 2003.

3.g3 c6 4.Nf3 b6 5.Nc3 Bb7 6.Bg2 Nf6 7.0-0 0-0 8.e4 e5 9.d4+= Qe7 10.de5 Be5 11.Ne5 Qe5 12.Bb2 Qh5 13.Qh5+– Nh5 14.e5 g6 15.Nb5 Na6 16.Nd6 Bc8 17.Rad1 Nb8 18.Bc1 Na6 19.Nc8 Rac8 20.Rd7 Rc7 21.Rfd1 c5 22.b5 Rd7 23.Rd7 Nb8 24.Ra7 Rd8 25.Bf3 Nd7 26.Bg5 f6 27.Bd5 Kh8 28.e6 Nb8 29.e7 Re8 30.Bh6 Ng7 31.Bf7 (31.Bf7 Rc8 32.Bg7 Kg7 33.e8Q Re8 34.Be8 Kf8 35.Bc6+–) 1–0. ilmarinens (2315) – capacuba (2160), net–chess.com, 2006.

3.c4 Bf6 4.Nc3 b6 5.Bb2 Bb7 6.Nf3 Bf3 7.ef3 Ne7 8.d4 c5 9.dc5+= bc5 10.Qc2 cb4 11.ab4 0-0 12.Bd3+= Nbc6 13.Na2 Nd4 14.Bh7+/– Kh8 15.Qd3 Nc2? 16.Qc2+/– Bb2 17.Qb2 Kh7 18.0-0 Qc7 19.Qc2 Kg8 20.Rfd1 Rab8 21.Rd3 Nd5 22.Qd2 Qc4= 23.Rc1 Qb5 24.f4? Nf4!–/+ 25.Rf3? Ne2–+ 26.Kh1 Nc1 27.Qc1 Rfc8 28.Qb1 a5 29.Rh3 f5 30.Qd1 Rc2! 31.g3 Ra2 (31...Ra2 32.Kg1 ab4–+; better is 31...Rd2! 32.Rh8 Kh8 33.Qh5 Kg8 34.Kg2 Ra2 35.Qd1–+) 0–1. alaamattar (2145) – eweram (2015), net–chess.com, 2006.

4.Nc3 d6 5.e3 c6 6.Nf3 d5 7.Ne2?? (better 7.d4+=) 7...Be7 (better 7...Bb2 8.Rb1 Bf6-+ (8...Ba3?! 9.Rb3-+)) 8.Nc3?? (better 8.Bg7 Bf6 9.Bh8 Bh8 10.d4+-) 8...Bf6 9.e4 (9.Be2 e5=) 9...d4 (9...de4!? 10.Ng1 Be5=+) 10.e5 dc3 11.Bc3 (better 11.ef6 cd2 12.Qd2 Qd2 13.Kd2 Nf6 14.Bd3=) 11...Be7-+ 12.d4 f5 13.d5? (better 13.Bd2-/+) 13...cd5-+ 14.Nd4 Nf6?? (better 14...Bd7-+) 15.Bb5=+ Bd7 16.ef6 (16.Ne6 Qc8 17.Bb2 Bb5 18.Ng7 Kd8 19.ef6 Qd7=) 16...Bf6-/+ 17.Ne6?? (17.0-0 0-0-/+) 17...Bb5 (better 17...Bc3 18.Kf1 Bb5 19.Kg1-+) 18.Nd8?? (better 18.Bf6 Qf6 19.Nc7 Kf7 20.Qd5 Kg6 21.0-0-0=) 18...Kd8 (better 18...Bc3 19.Qd2 Bd2 (19...Ba1?! 20.Nb7 Bc6 21.Nd6 Kd7 22.Nf5+=) 20.Kd2 Kd8-+) 19.Bf6+- gf6 (19...Kc8 20.Qd5 Re8 21.Kd2 gf6 22.Qb5+-) 20.Qd5 Kc7 21.0-0-0 (21.Qb5 a6 22.Qc4 Nc6 23.Qf4 Ne5 24.Qf5 Raf8+-) 21...Bc6 (21...Bd7 22.Rhe1 Rd8 23.Re7+-) 22.Qc5 (better 22.Qd6 Kc8 23.Qf6 Re8+-) 22...b6 (22...Nd7 23.Qf5 a6 24.Rhe1+-) 23.Qe7 (better 23.Qd6!? Kb7 24.Qe7 Ka6 25.Qf6 Rc8 26.Qf5 Rc7+-) 23...Nd7 24.Rd7! Bd7 25.Rd1 Rhd8 (25...Rad8 26.Qd6 Kc8 27.Rd3+-) 26.Qd6 Kb7 27.Qf6 Rac8 (27...h5+-) 28.Rd7! Rc7 (28...Rd7 29.Qe6 Double attack (29.Qe6 Decoy)) 29.Qf5 (29.Qd8 h6 30.Rc7 Ka6 31.Qd3 b5 32.Qd6) 29...Rcd7 30.Qe4 Kc7 31.Qe3 Rd6 32.Kb2 Kc8 (32...R8d7 33.g4+-) 33.Qc3 (33.Qe4 R8d7 34.Qa8 Kc7 35.Qa7 Kc6+-) 33...Kd7 (33...Kb7 34.f4+-) 34.Qh3 (34.Qh3 Ke8 35.Qh7+-) 1-0. TwelveTeen (2285) - LukaszS (2020), Time forfeit, lichess.org, 2017. (=1.a3 e6 2.b4 Be7 3.Bb2 Bf6)

4.d4 a5 5.e4=.

4.d4 b6 5.e4+= Bb7 6.Nd2 d5 (6...a5 7.Ngf3+=) 7.e5 Be7 8.Ngf3 (8.Bd3 Nh6+=) 8...c5 9.c3 (9.bc5 bc5 10.dc5 Bc5+=) 9...cd4 (9...a5 10.bc5 bc5 11.Rb1+=) 10.cd4 a6 (10...Nh6 11.Bd3+=) 11.Bd3 b5 (11...Nc6 12.Rc1+=) 12.0-0+/– Nc6 (12...Nd7 13.Nb3+/–) 13.Qc2 (13.Nb3 Qb6+/–) 13...h6 (13...Rc8 14.Bc3+/–) 14.Rac1 (14.Nb3 Qc7+/–) 14...Rc8 15.Qb3 (15.Bc3 Bg5+/–) 15...Bg5 (15...g5 16.Qd1+/–) 16.Ng5 (16.a4 ba4 17.Qa4 Qb6+/–) 16...Qg5 (16...hg5 17.Qd1+/–) 17.f4 (17.Nf3 Qf4+/–) 17...Qd8 (17...Qg4 18.a4+/–) 18.f5 ef5 19.Bf5 Rc7 20.Qg3 g6?? (20...Qg5!? 21.Bg4 Re7+–) 21.Bd3 (better is 21.Bg6 h5 22.e6+–) 21...Nge7 22.Qf3 0-0 (22...Nc8 23.Nb3+–) 23.Qf4 Kg7 (23...Kh7 24.Nb3+–) 24.Qf6 (24.Nb3 Bc8+–) 24...Kh7 (24...Kg8 25.Rc5+–) 25.e6 (better is 25.Rc5+–) 25...Ng8?? (25...Qd6 26.Rce1 Rcc8+/–) 26.Qd8 Nd8 (26...Rd8 27.ef7 Kg7 28.fg8B Rg8+–) 27.Rc7 (27.Rc7 Kg7 28.e7 Ne7 29.Re7+–) 1–0. Wall,Bill – Hyperion, internet, 2006.

4.d4 d5 5.e3 Nd7 6.Nf3 c5 7.c4 cb4 (7...cd4!? 8.Nd4 Ne7+=) 8.ab4+– dc4 9.Bc4 Nb6 10.Bb3 Be7 11.Qd2 (11.b5!?+–) 11...Nf6+= 12.0-0 0-0 13.Rc1 (13.b5 Nbd5+=) 13...Bd7+= 14.Ne5 Nfd5 Attacks the isolani on b4 (14...Nbd5 15.Nc3+=) 15.Nd3+– (worse 15.Nd7 Qd7 16.e4 Nb4=) 15...Bc6 16.e4 Nf6 (16...Bg5 17.f4 Nf4 18.Nf4+–) 17.f3 a6 18.Nc5 (18.Na3 Nfd7+–) 18...Rc8 19.Nc3 Nfd7 20.Rd1 (better 20.Nd3+–) 20...Nf6? (20...Bd6 21.Qf2 Qc7 22.g3+–) 21.Rac1 (21.d5 ed5 22.ed5 Nbd5 23.Nd5 Nd5 24.Bd5 Qd5 25.Qd5 Bd5 26.Rd5 Bc5 27.bc5 Rfd8+–) 21...h6? (21...Nbd7 22.Kh1+–) 22.Rc2?? (better 22.d5 ed5 23.ed5 Nbd5 24.Nd5 (worse 24.Bd5 a5 25.Bc6 Qd2 26.Rd2 Rc6+–) 24...Nd5 25.Bd5 Bd5 26.Qd5 Qd5 27.Rd5+–) 22...Nfd7 (22...Nbd7 23.Kh1+–) 23.Rdc1 (better 23.Qf2 Nc5 24.dc5+–) 23...Nb8? (23...a5 24.Nd3 ab4 25.Na2+–) 24.Qe3 (24.d5!? N8d7 25.dc6 Nc5 26.Qd8 Rfd8 27.bc5 Bc5 28.Kf1 Rc6+–) 24...Qc7 (24...N8d7 25.d5 Nc5 26.bc5+–) 25.g3 Qd8 (25...Rfd8 26.Ne6 fe6 27.Be6 Kf8 28.Nd5 Nd5 29.ed5+– (29.Bd5?! Qd6+–)) 26.Rd1 (26.d5 ed5 27.ed5 Re8+–) 26...N8d7 (26...Qe8 27.Qf2 N8d7 28.Nd3+–) 27.Rcd2 (27.d5 ed5 28.ed5 Re8+–) 27...Nf6?? (better 27...Bg5 28.f4 Bf6+–) 28.d5 ed5 29.ed5 Nbd5 30.Nd5 (worse 30.Rd5 Nd5 31.Nd5 Bd5 32.Bd5 Bc5 33.bc5 Qg5+–) 30...Bd5 31.Bd5 (31.Rd5?! Nd5 32.Bd5 Bc5 33.bc5 Qg5+–) 31...Qe8 32.Kh1 (better 32.Ne4!? Nd5 33.Rd5 f5+–) 32...Bc5 33.Qe8 Rfe8 34.bc5 Nd5 35.Rd5 Re2 36.Rd8 Rd8 37.Rd8 Kh7 38.Bd4 Rc2 39.Rb8 Rc4 (39...Rd2 40.Be5 Rd7+–) 40.Bf2 Rc2 (40...Kg6 41.Rb7 a5 42.Kg2+–) 41.Kg2 a5 42.Rb7 a4 43.Rf7 a3 44.Ra7 a2 45.c6! Rc6 46.Ra2 Rc7 (46...g5 47.Bd4 Rc4 48.Be5+–) 47.g4 Rb7 (47...Rd7 48.h4+–) 48.Kg3 (48.Ra7 Rb2+–) 48...Rd7 49.Bc5 (49.h4 Rd6+–) 49...Rd5 50.Ra5 Kg8 51.h4 Kh7 (51...h5 52.Kf4 hg4 53.fg4+–) 52.Bb4 Rd7 (52...Rd1 53.Ra7 Kg8 54.Bc3+–) 53.Bc3 Rc7 (53...Rd3 54.Rc5 g5 55.Rc7 Kg8 56.h5+–) 54.Be5 Rd7 55.Rc5 Re7 (55...Kg8 56.h5+–) 56.f4 g5 (56...Kg8+–) 57.Rc7 gf4 58.Kf4 (58.Kf4 Rc7 59.Bc7+–) 1–0. Polischuk,Vyacheslav (1810) – Trotsenko,Evgenia (1985), Stavropol Region Championship, 2011.

5.e3 b6 6.Nge2 Bb7 7.Ng3 Nd7 8.Bb5 c6 9.Ba4 g6 10.0-0 Nh6 (10...Ne7 11.Qf3=) 11.Rb1 0-0 12.f4 Rc8 13.Bb3 a6 14.e4 de4 15.Nge4 Bd4 16.Kh1 Nf6 17.d3 Nfg4 18.Rf3 c5 19.Rg3?? (19.Qe1 cb4 20.ab4 Nf5=) 19...Ne3?? (better is 19...cb4 20.Rg4 bc3–+ (20...Bc3?! 21.Bc3 bc3 22.Rg3–/+)) 20.Qe2–/+ Nhf5 21.Rh3 (better is 21.Rf3 Ng2! 22.b5–+) 21...Nd5 (better is 21...cb4 22.ab4 Bc3 23.Bc3 Rc3 24.Re3 Ne3 25.Qe3 Be4 26.Qe4 Qc7–+) 22.Nd5+= Bd5 (22...ed5 23.c3 Bg7 24.Ng3+=) 23.Bd5 (23.c4 Bb7+=) 23...ed5–/+ (worse is 23...Qd5 24.Bd4 Qd4 25.c3+=) 24.Ng5 h6 25.Nf3 Bg7 (25...Re8 26.Qd1–/+) 26.Bc1 (better is 26.Bg7!? Kg7 27.bc5+=) 26...Re8 27.Qf2 d4 (27...cb4 28.ab4 Qc7 29.g4–/+) 28.g4 (28.Ne5 Qd5–/+) 28...Ne3 29.Ne5 (better is 29.Be3!? de3 30.Qe2–/+) 29...Be5 30.fe5 Kg7?? (better is 30...Qd5 31.Kg1 Ng4–+ (31...Qe5?! 32.Be3 de3 33.Qe2–+)) 31.Be3+= de3 32.Qe3 g5 (32...Qd5 33.Kg1 h5 34.gh5 Re5 35.Qf2 Rh5 36.Rh5 Qh5 37.Rf1 Qg5 38.Kh1 Qd5 39.Kg1+=) 33.bc5 (33.c4 Qe7+/–) 33...Qd5 (33...Rc5 34.d4 Rc2 35.Rf3+=) 34.Kg1 (better is 34.Qf3!? Rc5 35.Qd5 (35.Rb6?! Qe5 36.Rb1 Rc2+=) 35...Rd5 36.Rb6 Rde5 37.Rf3+/– (37.Rhh6?! Re1 38.Kg2 R1e2 39.Kf1 Re1 40.Kf2 R1e2 41.Kg1 Re1 42.Kf2 R1e2 43.Kf1 Re1 44.Kf2=; 37.Ra6?! Re1 38.Kg2 R8e2 39.Kf3 Re3 40.Kf2 R1e2 41.Kf1 Re1 42.Kf2 R1e2 43.Kf1 Re1 44.Kf2=)) 34...Re5= 35.Qf2 Rce8?? (35...bc5 36.Rf3=) 36.Rf1 (better is 36.c4 Qd7 37.cb6+/–) 36...Re2+= (36...Qc5?? 37.d4 Qc4 38.Qf6 Kg8 39.de5 Qg4 40.Kh1 Qe4 41.Rhf3 Re5 42.Qf7 Kh8 43.Kg1 Qd4 44.R3f2 Qg4 45.Kh1 Qe4 46.Rg2+–) 37.Qf6 Kg8 38.Rhf3 R2e7?? (better is 38...Rc2 39.cb6 Ree2=) 39.Rf5 (39.cb6!? Rb7 40.Qh6 Re6+–) 39...Qd4?? (better is 39...Qe6+–) 40.Qd4 (40.Qd4 bc5 41.Qd5+–) 1–0. Otte,Marco – Burgemeister, Wag.Ext.4vsRhenen, 1996.

5.e3 d4 6.ed4 Bd4 7.Nf3 Bf6 8.Be2 Ne7 9.0-0 Nd5 (9...Nbc6 10.Re1+=) 10.Nd5 (10.d4 0-0+=) 10...Bb2= 11.Ra2 Ba3 (11...Be5 12.Ne5 Qd5 13.Nc4=) 12.Nc7+= Qc7 13.Ra3 Nc6 (13...0-0 14.d4+=) 14.Rc3 (14.c3 Qd6+=) 14...Qb6 (14...Qd6 15.b5 Nb4 16.d4+=) 15.b5+= Ne7 (15...Nd4 16.Bd3+=) 16.Re3 (16.d4 0-0+=) 16...Nd5 (16...0-0 17.d4+=) 17.Rb3 0-0 18.c4 (18.d4 Rd8+=) 18...Nf4 19.Rc3 (19.d4 Rd8 20.c5 Qc7+=) 19...Bd7 (19...a6 20.ba6 ba6 21.Re1=) 20.Ne5 (20.Re1 a6=) 20...Qc7 21.Nd7 (21.Re3 a6=) 21...Ne2 (21...Qd7 22.Bf3=) 22.Qe2 Qd7 23.Rg3 (23.Rd3 Qc7 24.Ra3 Rfc8=) 23...a5 (23...Rfd8 24.Qe5 g6 25.d3=) 24.Qg4 g6 25.Qh4 (better is 25.Rd1!?=) 25...Qd2–/+ 26.Rh3 h6 27.Qh6 (27.Re3 Rfc8–/+) 27...Qh6 28.Rh6 Rfc8 (28...Rfd8 29.Rh4–/+) 29.Rh4 b6 (29...a4 30.Ra1–/+) 30.Rc1 (30.Ra1 a4+=) 30...Rc5 (30...a4 31.Ra1–/+) 31.Rd4 (31.Kf1 a4–/+) 31...Rac8 32.Kf1 (32.Re1 Rc4 33.Rd6 R8c5 34.Rb6 Rb4–+) 32...Rb5!–+ 33.cb5 (better is 33.Ke2!? Rg5 34.Rg1–+) 33...Rc1 34.Ke2 Rb1 35.Kd3 (35.Ra4 Rb5 36.Ke3 Re5 37.Kd3 Rd5 38.Kc2 Kf8–+) 35...Rb5 36.Kc4 (36.Ra4–+) 36...Rb2 (better is 36...Rb4!? 37.Kd3 Rd4 38.Kd4–+) 37.Rf4 (37.Rd8 Kg7 38.f3–+) 37...Rb4 (37...Rb4 38.Kd3 Rf4–+) 0–1. Bango,Dominik – Hirmajer,Jan (1955), 3rd Liga A2, 2013.

5.Nf3 a5 6.ba5 c5 7.e3 Nc6 8.Be2 Qa5 9.0-0 Nge7 10.Rb1 0-0 11.Nb5 Qd8 (11...Bb2!? 12.Rb2 e5=+) 12.Bf6+= gf6 13.Rb3 (13.c4 dc4 14.Bc4 e5+=) 13...Ng6 14.Qa1 Kh8 15.g3 (15.Qc3 Qe7+=) 15...e5= 16.h4 (16.Qc3 Qe7=) 16...Bg4 17.Nfd4? (17.Kh2 e4 18.Ng1 Be2 19.Ne2 Nge5=+) 17...f5 (17...Nd4 18.Nd4 Bh3-+ (worse 18...ed4 19.Bg4 Ne5 20.Be2+=)) 18.Bg4 fg4 19.Nf5 Qf6 20.Nbd6 Rfd8 21.h5 Nge7 (21...Rd6?! 22.Nd6 Qd6 23.hg6+=) 22.Ne7 Rd6 (worse 22...Ne7 23.Nb7 Rdc8 24.Rfb1+=) 23.Nc6 bc6 24.Rb7 Rg8 (24...Qf5 25.Re7 d4 26.ed4 cd4 27.Re1-/+) 25.a4 (25.Qc3 c4=) 25...Qe6 (25...Qf5 26.Re7 Rg5 27.Qb2-/+) 26.a5 Rd7?? (26...Qf5 27.Re7 d4 28.Qa2=) 27.a6 (better 27.Rd7 Qd7 28.Qe5 f6 29.Qf6 Qg7 30.Qc6+-) 27...Rb7= 28.ab7 Rb8 29.Rb1 Qd7?? (better 29...c4!?+=) 30.Qa7 (30.Qe5 f6 31.Qb8 Kg7 32.Qc8 c4 33.Qd7 Kh6 34.b8Q Kh5 35.Qh7 Kg5 36.Qbg8) 30...Qc7+/- 31.Qc5 Kg7 (31...Kg8 32.Rb6 Rb7 33.Rc6+-) 32.h6! Kh6 33.Qb6 (33.Rb6 Kg7 34.Rc6 Qb7 35.Qd5 Qe7+-) 33...Qb6 34.Rb6 Kg6 (better 34...Kg5!?+=) 35.Rc6+- Kg7 36.Rc7 h5 (36...Kf6 37.e4! d4 38.c4 dc3 39.dc3+-) 37.Kg2 (37.e4!? d4+-) 37...Kf6 38.d3 (38.e4 d4+-) 38...Ke6 39.c4 f6?? (better 39...Kd6 40.Rf7 e4+-) 40.c5 Kf5 Black plans e4 (40...f5+-) 41.c6 e4 (41...Ke6 42.Rd7+-) 42.de4 de4 43.Rc8 Rc8 44.bc8Q Kg5 (44...Kg6 45.Qe8 Kg5 46.c7 h4 47.gh4 Kh6 48.Qf7 g3 49.c8Q gf2 50.Qcf8) 45.Qe6 (45.c7 h4 46.gh4 Kg6 47.Qf8 f5 48.c8Q Kh5 49.Qff5 Kh4 50.Qg4) 45...h4 (45...Kg6 46.c7 h4 47.c8Q h3 48.Kh2 Kg7 49.Qcg8 Kh6 50.Qf6 Kh5 51.Qd5) 46.gh4 Kh5 (46...Kg6 47.c7 g3 48.Qe4 Kh6 49.c8Q Kg7 50.Qd7 Kh6 51.Qeh7) 47.Qf5 (47.Qf6 g3 48.Qg5) 47...Kh4 (47...Kh6 48.Qf6 Kh7 49.c7 g3 50.c8Q gf2 51.Qch8) 48.Qf6 (48.c7 g3 49.fg3) 48...Kh5 49.Qf5 (49.c7 g3 50.c8Q gf2 51.Qcf5) 49...Kh4 (49...Kh6 50.c7 Kg7 51.c8Q g3 52.Qcf8) 50.Qg6 g3 51.fg3 1-0. black_bishop_88 (2465) - WcMirkoCzentovic (2515), lichess.org, 2020. (=1.a3 e6 2.b4 Be7 3.Bb2 Bf6)

5.g4 a5 (5...e5 6.h3=+) 6.h4 h6 7.Nf3 (7.b5 Bh4 8.Nf3 Be7=+) 7...Bd7 (7...e5!?-/+) 8.Bg2= Ne7 (8...Qe7 9.ba5 Ra5 10.Rb1=) 9.g5+= hg5 10.hg5 (worse 10.Ng5 Ng6 11.Nf3 Bc6-/+) 10...Rh1 11.Bh1 Bc3 12.Bc3 Nf5 13.ba5 c5 14.e3 Nc6 Increasing the pressure on the isolated pawn on a5 15.Rb1 Na5 16.Ne5 (16.g6 f6=) 16...Nc6 (16...Qg5 17.Ba5 Ra5 18.Nd7 Kd7 19.Rb7 Kd8 20.Qb1 Qg1 21.Ke2 Qb1 22.Rb1-/+) 17.Rb7 (17.Qh5!? Ne5 18.Be5+=) 17...Ne5=+ 18.Be5 Bc6 (18...Qg5!? 19.Rb8 Rb8 20.Bb8 Qg1 21.Ke2 Qg4 22.Ke1 Qc4=+) 19.Rc7+= Bb5?? (19...Qg5!? 20.Rc6 Ne7 21.Rc5 Qe5=) 20.Bf4?? (better 20.Qh5 Bd7 21.e4 de4 22.Be4+-) 20...Ra3+/- 21.Qb1 Bd7 22.Qb2 (better 22.Rc5 f6 23.Qd1+/-) 22...Qa8=+ 23.Bf3 Ra2 24.Qb7 Ra1 (better 24...Qb7!? 25.Rb7 Nh4=+) 25.Ke2= Qb7 26.Rb7 f6 (better 26...Ba4 27.Rb2 Rc1=) 27.g6?? (27.gf6 gf6 28.Bg4 Ra2+=) 27...Nh4?? (better 27...e5!? 28.Bh2 e4-+) 28.d3 (better 28.Bd6 Nf3 29.Kf3+/-) 28...Ng6?? (28...Ra2 29.Rb8 Ke7 30.Rg8 Rc2 31.Kd1=) 29.Bd6?? (better 29.Bh5 e5 30.Bg6 Kd8 31.Bg3+-) 29...Nh4= 30.Bh5 (worse 30.Bc5 Ra2 (worse 30...Nf3 31.Kf3 e5 32.c3=) 31.Bh5 g6 32.Rb8 Kf7-/+) 30...g6 31.Rb8 Kf7 32.Bg4 f5 33.Bf3 (better 33.Rf8 Kg7 34.Rd8+=) 33...e5?? (33...Ra6 34.Bg3 Nf3 35.Kf3=+) 34.Be5 (better 34.Bd5 Kf6 35.Rb7 Rc1 36.Rd7 Kg5+-) 34...Ke6?? (better 34...Re1! 35.Ke1 Nf3 36.Ke2 Ne5-/+) 35.Bg3 (better 35.Ba1 Nf3 36.Rb6 Kf7 37.Kf3+-) 35...Nf3= 36.Kf3 Ra2 37.Rb6 Ke7 (37...Kf7 38.Rd6 Ke7 39.Rg6 (39.Rd5? Bc6 40.c4 Bd5 41.cd5 Rd2-+) 39...Rc2 40.Bh4 Ke8 41.d4=) 38.Bd6 Kd8 39.Bc5 Ke8 (39...Rc2 40.d4 g5 41.Kg3+=) 40.Bd4 (40.Rg6 Rc2 41.Rg8 Kf7 42.Rf8 Kg6+/-) 40...Kf7 (40...Rc2 41.Rg6 Bb5 42.Re6 Kd7 43.Re5 Bd3 44.Rd5 Ke6 45.Re5 Kd6 46.Re8+=) 41.Rb8 (41.c4 dc4 42.dc4 g5+/-) 41...Be6 (41...Rc2 42.Kf4+=) 42.Rh8 (42.Rb7 Ke8+/-) 42...Ke7 (42...Rc2 43.Rh7 Ke8 44.Bf6+=) 43.Rh7 Kd6 44.c4 (better 44.Kf4!? Bd7 45.Rh6+/-) 44...dc4= 45.dc4 Bc4 46.Kf4 (46.Rg7 Bd5 47.Kg3 f4 48.ef4 Be4=) 46...Bd5 (46...Rf2 47.Kg5 Rg2 48.Kf6 Be2-/+) 47.Be5?? (47.f3 Rg2+=) 47...Kc5 (better 47...Ke6 48.f3 Bf3-+) 48.Rc7 Kb4 49.Rc3?? (49.Kg3 Kb3=) 49...Bc4 (better 49...Rf2 50.Kg5 Rg2 51.Kf6 Be4-+) 50.Rd3?? (better 50.f3=) 50...Bd3-+ 51.Bd6 Kb3 52.Be5 (52.f3 Rf2-+) 52...Kc2 (better 52...Rf2 53.Kg3 Re2 54.Bf4-+) 53.Kg5 Kd1 54.Kf6 (54.f4-+) 54...Kc2 (better 54...Rf2 55.Bf4 Rg2 56.Bh6-+) 55.Kg6?? (55.Kg5 Be4 56.Kg6-+) 55...Kd1-+ 56.Kg5 (56.f4-+) 56...Kc2 (better 56...Rf2!? 57.Bd4-+) 57.Kf4?? (57.Kg6 Kb3 58.f4 Kc4-+) 57...Kd1 58.f3?? (58.Kg5 Rf2 59.Bd4-+) 58...Kc2 (58...Rf2 59.Kg3 Ke2 60.f4-+) 59.e4 (59.Bd4 Kd2-+) 59...Kd1 (better 59...fe4 60.Ke3 ef3 61.Kf3 Kb3-+) 60.ef5 Kc2 61.f6 (61.f6 Bc4 62.Ke4-+). black_bishop_88 (2510) - WcMirkoCzentovic (2480), lichess.org, 2020. (=1.a3 e6 2.b4 Be7 3.Bb2 Bf6)

3.c4 Nf6 4.Bb2 Be7 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.a3 Be7).

3.d4 d5 4.e3 Nf6 5.c4 c6 6.Nc3 Bd6 7.Bd3 0-0 8.Nf3 Nbd7 9.0-0 Ne4 10.Bb2 Rf6 11.Rc1 Rh6 12.h3 Ng5 13.cd5 Nf3 14.Qf3 ed5 15.Nd5 Nf8?? (better is 15...cd5 16.Qd5 Kh8 17.Bf5 Nf6+=) 16.Nf4+– g5 17.Nh5 (17.Bc4!? Ne6 18.Ne6 Be6 19.Qf5 Qe7+–) 17...g4 18.hg4 fg4 19.Bc4 Be6 20.Be6 Ne6 21.Qg4 Rg6 22.Qf3 Qh4 23.Ng3?? (better is 23.g3 Rf8 24.Qh1 Qh1 25.Kh1+=) 23...Rf8 24.Qh5–/+ Bg3 25.Qh4 Bh4 26.e4? Nf4–+ 27.g3 Ne2 28.Kh2 Nc1 29.Bc1 Bg3! (29...Bg3 30.fg3 Rf1–+) 0–1. cr50 – whitecat25, ChessWorld.net, 2011.

3.d4 Nf6 4.Nc3 Be7 5.Nf3 0-0 6.h3 b6 7.Bb2 Bb7 8.e3 h6 9.Be2 c5 10.dc5 bc5 11.b5 a6 12.ba6 Ba6 13.Ba6 Ra6 14.0-0 d5 15.Ne5 Qe8 16.Qe2 Ra8 17.Rfd1 Nc6 18.Nb5 Rc8 19.a4 Ne4 20.Nc6 Rc6 21.c4 Qd8 22.Rac1 Ra6 23.cd5 ed5 24.Nc7 Qc7 25.Qa6 Rb8 26.Qe6 Kh8 27.Be5 Bd6 28.Bd6 Qd6 29.Qf5 Rf8 30.Qd5 Qd5 31.Rd5 Nf2 32.Rcc5 Ne4 33.Rc7 Nf6 34.Re5 Ra8 35.a5 Kh7 36.Ree7 Ne8 37.Ra7 Rd8 38.a6 Kg6 39.Rad7 Ra8 40.a7 Kf6 41.Rf7 Ke6 42.Rfe7 Kf6 43.Rb7 Nd6 44.Rb8 1–0. pillsbury (2180) – jbloe (2360), net–chess.com, 2014.

3.e3 Nf6 4.c4 c6 5.Bb2 d5 6.cd5 ed5 7.Nf3 Be6 8.b5 cb5 9.Bb5 Nc6 10.Ne5 Qb6 11.Bc6 (11.Qa4!?+=) 11...bc6= 12.d4. thedesertfox (1915) – gregorgysi (2200), net–chess.com, 2004. (=1.a3 f5 2.b4 e6)

3.Nf3 Nf6 4.e3 Be7 5.Bb2 (---> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.Nf3).

3.f4 Nf6 4.Nf3 d5 5.e3 Bd6 6.c4 c6 7.Bb2 0-0 8.Be2 b6 9.Qb3 Nbd7 10.Be5 Qe7 (10...Ne5? 11.fe5 (worse is 11.Ne5 Be5 12.fe5 Ng4+=) 11...a5 12.ed6 (12.ef6?! Qf6 13.Ra2 ab4+/–) 12...ab4 13.Qb4+–) 11.d4 Ne4 (11...Ne5? 12.fe5 (12.Ne5?! c5=) 12...dc4 13.Qc4+– (worse is 13.ef6 cb3 14.fe7 Be7+–)) 12.0-0 Bb7 13.Bd6 Qd6 14.c5 Qe7 15.Ra2 (15.Nbd2 Rab8+=) 15...g5 (15...Rfb8!?=) 16.fg5+/– Ng5 17.Ng5 Qg5 18.Rf3 Kh8 19.Rg3 Qh4 20.Nd2 Rg8 21.Nf3 Qh6 22.Rh3?? (better is 22.Rg8 Rg8 23.Qd3+=) 22…Qh3–+ (22...Qh3 23.g3 Rab8–+) 0–1. Quabach,Juergen (2155) – Thiemonds,Uli (2065), NRW Class2, 2006.

3.Bb2 (--> 1.b4 f5 2.Bb2 e6 3.a3).

3.Bb2 Nf6 4.c4 Be7 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.a3 Be7).

3.Bb2 Nf6 4.e3 Be7 5.c4 0-0 6.Nf3 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.a3 Be7 5.Nf3 0-0 6.e3).

3.Bb2 Nf6 4.e3 Be7 5.Nf3 (--> 1.b4 f5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3).

3.Bb2 Nf6 4.Nf3 (--> 1.b4 f5 2.Bb2 Nf6 3.Nf3 e6 4.a3).

3.Bb2 Qh4 4.Nf3 Qh6 (--> 2.Bb2 Qh4 3.a3 f5 4.Nf3 Qh6).

3.Ra2 Nh6 4.Bb2 e5 5.c4 Qe6 6.e4 b5 7.d3 bc4 8.dc4 Ba6 9.Nd2 Qg6? 10.b5 Bb7+/– 11.Ngf3 d6 12.Nh4 Qf6= 13.g3 c6 14.bc6 Nc6 15.Qa4 Ng4 16.Nhf3 Be7 17.h3 Nh6 18.Be2 0-0=+ 19.0-0 Nd4 20.Nd4+= ed4 21.Bd3 Bc8 22.h4 Bh3= 23.Re1 Ng4 24.Re2 h6 25.Qa5 Nf2?? 26.Rf2+– Bd8? 27.Rf6 Ba5 28.Rd6 Bd2 29.Bd4 Be1 30.Kh2 Bg4 31.e5 Rfd8 32.Be4 Rd6 33.ed6 Rd8 34.c5 Re8 35.Bd5 Be6 36.Be6 Re6 37.Rb2 Ba5 38.Rb7 a6 39.d7 f6 40.Rb8 Kh7 41.Bc3!! Bc7 42.Rc8 Re2 43.Kh3 Bg3 44.Kg3 Re3 45.Kg4 Rc3 46.d8Q Rc4 47.Kf3 (47.Kf3 Kg6 48.Qd3 f5 49.Qc4 Kh5 50.Qf7 g6 51.Rg8 Kh4 52.Qg6 h5 53.Qg3; 47.Kf5 g6 48.Ke6 Re4 49.Kd5 Re5 50.Kd6 Re6 51.Ke6 g5 52.Qg8) 1–0. gdraper (2035) – nwishn (1900), net–chess.com, 2006.

3.Bb2?? Qb2–/+ 4.Nc3 a5?? (better is 4...Bb4!? 5.ab4 Qb4–/+) 5.b5 (5.Rb1!? Qa3 6.Nb5 ab4 7.Na3 ba3 8.e4+=) 5...Ba3 6.e3?? (better is 6.Rb1+=) 6...Bb4 (6...Be7 7.Ra2 Qb4 8.Qa1–+) 7.Nge2 Bc3 8.Nc3 d5 9.Be2 d4! 10.ed4 Ne7 11.0-0 0-0 12.Bf3 Rd8 13.Re1 c5 (better is 13...Rd4!? 14.Be4 Qb4 15.Qh5–+) 14.d5?? (14.Rb1 Qa3 15.Rb3 Qb3 16.cb3 Rd4=) 14...ed5?? (better is 14...a4–+) 15.Nd5?? (15.Rb1!? Qa3 16.Re7+=) 15...Rd5 (better is 15...Nd5 16.Bd5 Qb5–+) 16.Bd5+= Nd5?? (better is 16...Kf8 17.Qe2 Qf6=) 17.c3 (17.Re8) 17...b6 (17...Be6!? 18.Re4 Nf6 19.Rb1–+) 18.d4 (18.Re8) 18...Nc3 (18...Be6 19.c4 Nc3 20.Qf3–+) 19.Qc1 (19.Re8) 19...Qc1 (19...Ne2 20.Kh1 A) 20...Nc1?? 21.Re8; B) worse is 20...Qc1 21.Rac1 (21.Rec1?? Nd4 22.Ra4 Bd7–+) 21...Bg4 22.f3–+; C) 20...Qb5–+) 20.Rec1 (20.Rac1 Be6 21.Rc3 Nd7–+) 20...Na2! 21.Ra2 cd4?? (better is 21...Be6 22.Rd2 Nd7 23.dc5 Nc5–+) 22.Rac2 (22.Rc8) 22...Be6?? (better is 22...Nc6 23.Rc6 Bf5 24.Rb6 Re8+/–) 23.h3 (23.Rc8 Bc8 24.Rc8) 23...Nc6 (better is 23...Kf8–+) 24.bc6+= Rc8 25.c7 Rc7?? (better is 25...Kf8+=) 26.Rc7+– (26.Rc7 g5 27.Rb7+–) 1–0. Fournier,Frederic (1975) – Hefestion (1665), Active Blind, 2007.

3.c3 d5 4.d4 Bd7 5.Nf3 Nc6 6.Bg5 Qg6 7.e3 f6 8.Bd3 f5 9.0-0 h6 10.Bf4 0-0-0 11.c4 a6? (better is 11...dc4 12.Bc4 Kb8+/–) 12.b5+– ab5 13.cb5 Nce7 (13...Nb8 14.Qc2 c5+–) 14.Qc2 c6 (14...Nc6+–) 15.Qa4 (15.Qa4 e5 16.Qa8 Kc7 17.Be5 Qd6 18.Qa5 b6 19.Qa7 Kc8 20.Bd6 c5 21.Qa8) 1–0. Wall,Bill – Amadeus, internet, 2002.

3.Nc3 Qe5 4.Nf3 Qf5 5.e4+/– Qf4 6.d4 (6.d4 Qg4 7.e5+/–; 6.Be2 Qf6+/–) 1–0. ball – Rtitov, internet, 2006.

3.Nc3 g6 4.Bb2 e5 (4...Bg7 5.Nf3 Qd8 6.e3+=) 5.e3 (better 5.d4!?+–) 5...d6 6.Nd5 Qe6?? (better 6...Qd8+=) 7.Nc7+– Ke7 8.Ne6 Be6 9.Nf3 h5 (9...Bg7 10.d4 e4 11.Ng5+–) 10.Be2 (10.d4 f6+–) 10...Nd7 11.0-0 (11.Ng5 Ngf6+–) 11...Ngf6 12.c4 e4 (12...Bg7 13.Ng5+–) 13.Nd4 Nb6 (13...Bg4 14.f3 ef3 15.Bf3+–) 14.Ne6 fe6 15.d3 ed3 16.Bd3 Na4 (16...Bg7+–) 17.Qa4 (better 17.Bf6 Kf6 18.Qf3 Kg7 19.Qb7 Be7 20.Qe7 Kh6+–) 17...Kf7 18.Bf6 (better 18.Qb5!? Be7 19.Qb7 Rae8+–) 18...Kf6 19.Qc2 (better 19.Qd1 Rb8 20.Qf3 Ke7 21.Bg6 Kd7+–) 19...e5 20.Bg6 Rh6 21.Qf5 Kg7 22.Qf7 Kh8 23.f4 (better 23.Qb7!? Rd8 24.Qc7 Ra8+–) 23...ef4 24.ef4 Bg7 25.f5 (25.Rae1 Be5 26.fe5 Rg6 27.Qg6 b5 28.Rf7 de5 29.Qg7) 25...Rf8 26.Qf8 (better 26.Qe7 Rg8 27.Rad1 Bf8 28.Qb7 a5+–) 26...Bf8 27.Rae1 Bg7 (27...Kg7+–) 28.Re8 (28.Re8 Bf8 29.Rf8 Kg7 30.Rf7 Kg8 31.Re1 Rg6 32.fg6 d5 33.Re8) 1–0. retiponziani (1710) – PowerPreacher, ChessWorld.net, 2009.

3.d4 a5 4.b5 e5=.

3.d4 Nc6 4.Nf3 e5 5.Bg5 Qd6 (5...Qg6!? 6.de5 Ne5=) 6.d5+= Nd4 (6...f6 7.Be3 Nce7 8.Nc3+/–) 7.Nd4+/– Qd5 (better is 7...ed4!? 8.Qd4 Qg6 9.Qe5 Be7 10.Be7 Ne7 11.Qc7 Nd5 12.Qe5 Ne7+/–) 8.Nf3+– Qd1 9.Kd1 e4 (9...f6 10.Bd2+–) 10.Nd4 h6 (10...Be7 11.Be7 Ne7 12.e3+–) 11.Nb5 hg5 12.Nc7 (12.Nc7 Kd8 13.Na8+–) 1–0. Wall,Bill – Construction, internet, 2000.

3.d4 d6 4.e4 c5 5.Nc3 cd4 6.Nb5 d5?? (better is 6...Qd8+=) 7.Nc7+– Kd7 8.Na8 Kd8 (8...de4 9.Bb2 e5 10.Qg4 Qe6 11.Qe4+–) 9.Nf3 de4 (9...Qg6 10.ed5 Qe4 11.Qe2 ed5 12.Qe4 de4 13.Nd4 Bd6+–) 10.Bg5 Qe7 (10...ef3 11.Qd4 Nd7+–) 11.Qd4 Ke8 12.Bb5 Bd7 13.Be7 Ke7 14.Qc5 Ke8 15.Qc7 Na6 16.Qd7 1–0. Pierred (2180) – Locochessboy, Rated game, 5m + 0s, 2005.

3.e4 Qa1 4.e5 d6 5.Nc3 de5 6.Bc4 a5 7.Nge2 ab4 8.Nb5 Bd6 9.0-0 ba3 10.c3 Bd7 11.Qb3 Bb5 12.Bb5 c6 13.d3 cb5 14.Qb5 Nd7 15.Qb7 Rd8 16.Qb3 Ngf6 17.d4 ed4 18.Nd4 Rb8 19.Qc4 0-0 20.Nc2 Qb1 21.Na3 Ba3 22.Ba3 Rfc8 23.Qc8 Rc8 24.Rb1 h6 25.Rc1 Ne4 26.c4 Rb8 27.f3 Rb3 28.Be7 Nc3 29.Kf2 Ne5 30.c5 Nd3 31.Ke3 Nc1 32.Kd2 N1e2 33.Kc2 Nd4 34.Kd2 Ncb5 35.Kc1 Rc3 36.Kd1 Nb3 37.h4 Nc5 38.Bc5 Rc5 39.Ke1 Rc2 40.Kf1 h5 41.g3 Nd4 42.f4 Kh7 43.Kg1 Nf5 44.g4 hg4 45.h5 g3 46.h6 Kh6 47.Kf1 g2 48.Kg1–+ Ne3 49.Kh2 Rc1 50.Kg3 g1Q 51.Kf3 Qg2 52.Ke3 Rc3 53.Kd4 Qd2 54.Ke4 Qd5 (54...Qe3) 0–1. iboyd (1950) – nwishn (1900), net–chess.com, 2006.

4.Bb2 Qe7 5.Nf3 Bb7 6.Nc3 Na6 7.e3 Nh6 8.Bb5 Nb4? 9.ab4+– 0-0-0? 10.Ba3 a6 11.Ba4 b5 12.Bb3 Kb8 13.0-0 Ng4 14.h3 Nh6 15.d4 g6 16.Ne5 Qg5 17.e4 f5 18.d5 fe4 19.Qd4 ed5? 20.Bd5 Bd5 21.Qd5 c6 22.Nc6! dc6 23.Qg5 Nf7 24.Qf4 Nd6 25.Ne4 h6 26.Rd1 Ka7 27.Qe3 Kb7 28.Nc5 Ka8 29.Na6 Kb7 30.Bb2 Nc4 31.Nc5 Kc8 32.Qe6 Kc7 33.Ra7 Kb6 34.Rd8 Nb2 35.Rb7 1–0. stardom – maf, net–chess.com, 2001.

4.Bb2 Qg6 5.g3 a5 6.Bg2 d5 7.Nf3 Ba6 8.d3 ab4=+ 9.a4 Nc6 10.c3 bc3 11.Nc3 Bb4 12.Nh4 Qf6 (12...Qf6 13.0-0 Qg5=+; 12...Qh5 13.0-0 Nge7 14.Qb3–/+) 0–1. Pumphut – k2piet, Hauptsache SPASS, 2003.

4.Qa4 (4.b5 d5=) 4...b5 5.Qb5 Ba6?? (better is 5...ab4 6.Nf3 Nc6=) 6.Qa5+– Nc6 (6...Qf4 7.Qh5+–) 7.Qc7 Nge7 8.Nf3 Nd5 (8...e5 9.e4 Qg6 10.Qb6 Bf1 11.Rf1 Qe4 12.Qe3+–) 9.Qg3 h5 (9...Bb5 10.Ra2+–) 10.Qg5 (10.e4 Bf1 11.Kf1 Nf4+–) 10...Qg5 11.Ng5 Be7 12.Nf3 (12.d3 Rc8 13.Bd2 Nf6+–) 12...Nf4 (12...Nf6 13.a4+–) 13.a4 (better is 13.d4 Ng6+–) 13...Bc4 (13...d5 14.Ba3 Bc4 15.b5+–) 14.d3 Bb3 (14...Nb4 15.cb4 (15.dc4?! Nc2 16.Kd1 Na1 17.Bf4 Ra4+–; 15.Bf4?! Nc2 16.Kd2 Na1 17.dc4 Nb3 18.Kc2 Nc5+–) 15...Bb4 16.Bd2 Bd2 17.Kd2+–) 15.Bf4 0-0 (15...Ra4 16.Ra4 Ba4 17.e4+–) 16.b5 (16.a5 Rfc8 17.e4 Nb4 18.cb4 Bb4 19.Nbd2 Ba5+–) 16...Na5 17.e4 (17.Nfd2!? Bd5+–) 17...Bc2 (17...Nb7 18.a5 Ra5 19.Ra5 Na5 20.Be2+–) 18.Nd4 (18.Nd4 Bb1 19.Rb1+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

4.d4 ab4=+ 5.cb4 (5.e4=+) 5...b6 (better 5...Bb4!? 6.Bd2 Nc6-/+ (worse 6...Qd4 7.Bb4 Qd1 8.Kd1+/-)) 6.Bb2= c5 (6...d5 7.Nc3=) 7.Nf3 (better 7.Qc2!? Qg6 8.Qg6 hg6 9.bc5 bc5 10.Nc3=) 7...cb4=+ 8.ab4 Bb4 9.Nbd2 Ra1 10.Qa1 Qd8 (10...Qf5 11.Ba3 Ba5 12.Qb2-/+) 11.d5 (11.e4 Nf6 12.Bd3 0-0=+) 11...f6 (11...Nf6!?=+) 12.de6= Nc6 (12...de6? 13.Qa4 Nc6 14.Qc6 Bd7 15.Qc4+-) 13.ed7 Bd7 14.e3 Nge7 15.Bc4 Qc8 (15...Na5 16.0-0=) 16.0-0+= Be6 17.Qa2 Bc4 18.Qc4 Bd6 (18...Qf5 19.Rd1+=) 19.Rc1 Qd7 (19...Qf5 20.Qa4 b5 21.Qa8 Nd8 22.Ne4+-) 20.Nb3 (20.Ne4 Be5 21.Ne5 Ne5+-) 20...Nd8 21.Nbd4 Nf5 22.Nf5 Qf5 23.Nd4 Qd7 24.Qd5?? (24.Qb3 Bc5+-) 24...Bc5 (better 24...Bh2 25.Kh2 Qd5-+) 25.Qd7 (better 25.Qe4!? Qe7 26.Qg4+/-) 25...Kd7= 26.Nf5 g6 (26...Ne6!?=) 27.Bf6+= Ne6? (better 27...Rf8 28.Rd1 Ke6+=) 28.Bh8+- gf5 29.Be5 Kc6 30.g3 Nc7?! (30...b5 31.Kf1+-) 31.Bd4 (31.Bc7!? Kc7 32.Rc4 Kd6+-) 31...Nd5 32.Bc5 bc5 33.Kg2 Nb4 (33...Kb5 34.Kf3+-) 34.g4! Kd5?? (34...fg4 35.Rc4 Decoy) 35.Rd1 (35.gf5!? Nd3 36.Rd1 c4+-) 35...Ke5 (35...Ke6 36.gf5 Kf5 37.Rc1+-) 36.gf5 Kf5 37.Rc1 Nd3 (37...Na6+-) 38.Rc2 (38.Rc3 c4+-) 38...Ke4?? (better 38...Ne1 39.Kf1 Nc2-+) 39.f3 (better 39.Rc3+-) 39...Ke3 40.Rc3?? (better 40.Rc4 Nf4 41.Kg3 Nh5 42.Kh4+-) 40...Kd4+/- 41.Rc2?? (41.Ra3 c4 42.Kf1 c3+/-) 41...c4 (better 41...Ne1 42.Kf2 Nc2-+) 42.Kf1+/- Nb4 43.Rd2 Kc3 (43...Ke3!? 44.Rd7 c3 45.Rh7 Nd5+/-) 44.Rd8 Kb2 45.Rb8 Kb3 (45...Kc3 46.Kf2+-) 46.Rc8 (46.Ke2 c3+-) 46...c3 47.Ke2 Na2 (47...Nd5 48.Rc5 Nf4 49.Ke3 Ng2 50.Kd3 Nf4 51.Ke4+-) 48.Kd3 (48.f4 Nb4+-) 48...c2? (better 48...Nb4 49.Kd4 Nc2 50.Ke4 h5+-) 49.Kd2?? (49.Rb8 Nb4 50.Kd2 Kc4+-) 49...Nb4?? (better 49...c1Q 50.Rc1 Nc1 51.Kc1 Kc3=) 50.Rc3 Kb2 (50...Ka4+-) 51.Rc2 (better 51.f4 Nd5 52.Rc2 Kb3 53.f5+-) 51...Nc2-/+ 52.f4 Nb4 53.Ke3 Nd5 (better 53...Kc3!?-/+) 54.Ke4= Ne7 55.f5 Ng6?? (better 55...Kc3=) 56.f6 1-0. black_bishop_88 (2470) - Meshter (2400), lichess.org, 2020. (=1.a3 e6 2.b4 Qf6)

4.Bb2 Ng4 5.Nf3 Nc6 6.e3 Nce5 7.d4 Nc6 8.Be2 d5 9.Nbd2 Bd6 10.0-0 Qh6 h2 seems the pivot of the position 11.g3 f5 12.a4 e5 13.de5 Nce5 14.b5 Nf3 15.Nf3 Ne5? (better is 15...Be6=) 16.Ne5 Be5 17.Qd5 Bd6 18.c4 Rb8 19.c5 Be7 20.Bc4 Rf8 21.Rad1 g5 (21...f4 22.ef4 Qe6 23.Qe6 Be6 24.Be6+–) 22.Rfe1 (better is 22.Qe5 Ra8 23.c6 bc6 24.Qc7 Rf6+–) 22...c6 (22...Ra8 23.Qe5 Qf6 24.Rd8 Kd8 25.Qd5 Ke8 26.Bf6 Bf6 27.e4+–) 23.bc6 (better is 23.Qe5 Ra8 24.Rd6 Rf6+–) 23...Qc6?? (better is 23...bc6 24.Qe5 Rb4+–) 24.Qe5 Ra8 25.Rd2 Qa4 26.Qg7 Qc4–+ 27.Qh7 Qg8 28.Qh5 Rf7 29.Red1 Be6 30.Qf3 Rb8?? 31.Rd3? Bc5–+ 32.Be5 Rc8 33.Kg2 Rd7 34.e4 Rd3 35.Rd3 Qh7 36.ef5 Bf5 37.Rd2 Be4 38.Qe4 Qe4 39.Kg1 Qe5 (39...Qe5 40.Kg2 Qe4 41.f3 Qe1 42.Rc2 g4 43.fg4 Qe4 44.Kh3 Qh7 45.Kg2 Qc2 46.Kf3 Ke7 47.g5 Rf8 48.Kg4 Qe4 49.Kh5 Rh8) 0–1. pieeater – snake2, ChessWorld.net, 2012.

4.Nf3 d5 5.e3 (5.d4 Bd6 (5...Nf5 6.Nbd2 Nd6 7.e3 Be7 8.Bd3 Bd7 9.c4 dc4 10.Nc4 Nc4=) 6.c4 c6 7.Bg5 Qg6 8.c5 Bc7 9.e3 f6 10.Bh6 Qh6=; 5.d3 Bd6 (5...Ng4 6.Bg5 Qf5 7.Nbd2 Bd6 8.e4 Qg6 9.h3 Nh2 10.h4 h6=) 6.e4 Ng4 7.Be2 0-0 8.Qc2 a5 9.b5 Nd7 10.Nbd2 c5=) 5...Bd7 (5...e5 6.d3 a5 7.b5 Bf5 8.Nbd2 e4 9.Nd4 ed3 10.Nf5 Nf5=; 5...Bd6 6.d4 a5 7.b5 0-0 8.Bd3 e5 9.de5 Be5 10.Ne5 Qe5=) 6.Bd3 (6.d3 a5 7.ba5 Ra5 8.Qb3 Rb5 9.Qc2 Bd6 10.d4 Ra5=) 6...e5 7.e4 Bc6 (7...Qg6 8.Qe2 Qg2 9.Rg1 Qh3 10.Rg3 Qh5+=) 8.Qe2 (8.b5 Bd7 9.ed5 Bc5 10.0-0 0-0+=) 8...d4 (better is 8...Bd6!?+= 9.b5 Bd7 10.ed5 0-0+=) 9.cd4+/– ed4 10.0-0 (10.Bb2 Bd7+/–) 10...Nd7? (better is 10...a5+=; 10...Bd7+=) 11.b5+– Bc5 12.bc6 Qc6 13.Bb5 Qe6 14.d3 c6 15.Bc4 Qe7 16.Bg5 f6 17.Bh4 (17.Bh6 gh6 18.Nh4 Kd8+–) 17...Ne5 18.Ne5 Qe5 19.Bg3 Qe7 20.Nd2 Ba3 21.Nb3 Bb4 (21...Nf5 22.Bf4 b5+–) 22.e5 (22.Nd4 Bc3 23.Ne6 Ba1 24.Ra1 Kd7+–) 22...Bc3? (22...Nf5 23.Ra2 Ng3 24.fg3 (24.hg3?! fe5 25.Qe4 Bc3+=) 24...Qe5 25.Qg4+–) 23.Rac1 (better is 23.Qh5 Nf7 24.e6+–) 23...b5 24.Na5?? (better is 24.Qh5 g6 25.Qf3 bc4 26.Qc6 Kf7 27.Qd5 Qe6 28.Qb7 Qe7 29.e6 Kf8 30.Bd6 (30.Qa8?! Kg7 31.Qd5 cb3+/–) 30...Qd6 31.Qa8 Kg7 32.Qa7 Kf8 33.dc4+–) 24...Ba5= 25.Bb3 (25.Qh5 g6 26.Qf3+/–) 25...c5?? (better is 25...Bc3–/+) 26.Bd5 Rb8? 27.Rfe1?? f5?? 28.e6 Be1 29.Re1?? 0-0–+ 30.Bb8 Rb8 31.g3 a5 32.Kg2 Rb6 33.h3 a4 34.h4 b4 35.Qe5 g6?? 36.Kh3?? Ng4–+ 37.Qf4 b3 38.Bb3 Rb3 39.h5 a3 40.hg6 hg6 41.Kg2 Rd3 42.Kh3 Kg7 43.Kg2 a2 44.Kh3 Rb3 45.Kg2 Rb1 46.Rb1 ab1Q 47.f3 Qc2 48.Kh3 Qh2 0–1. pieeater – snake2, ChessWorld.net, 2011.

4.Bb2 ab4 5.ab4 Bb4?? 6.Ra8+– Ne7 7.Rb8 0-0 8.Nf3 b6 9.e4 Qh6 10.Bc4 Nc6 11.Ra8 Na5 12.Be2 d5 13.0-0 1–0. clochard (2200) – maf (2125), net–chess.com, 2004.

4.b5 b6 5.Nf3 Bb7 6.Bb2 d5 7.e3 Nd7 8.Rb1 Qe7. thedesertfox (1920) – maf (2105), net–chess.com, 2004.

4.Bb2 Bb7 5.e3 Nh6 6.Nf3 a5 7.Qb1 Qe7 8.Nb5 Kd8 9.Be2 Ba6 10.Be5 ab4?? 11.Nc7 Ra7 12.ab4 d6 13.Na6 Na6 14.Bd4 d5 15.Bb6 Kc8 16.Ba6 Kb8 17.Ba7 Ka7 18.Bd3 Kb8 19.Nd4 g6 20.Nc6 Kc7 21.Ne7 Be7 22.Ra7 Kd6 23.Re7! Ke7 24.Qa1 Rd8 25.Qa7 Kf6 26.Qd4 Ke7 27.Qh4 Kd7 28.Qh6 Rh8 29.Bb5 Kd6 30.Qg7 Rc8 31.d4 (31.d4 Ke7 32.Kd2+–) 1–0. jboger (2010) – gperez (1775), net–chess.com, 2010.

4.Bb2 Bb7 5.Nf3 Bf3 (5...Nc6 6.d4+=) 6.ef3 (6.gf3 Nc6+/–) 6...Qe5+= 7.Qe2 Qe2 8.Be2 a5 (8...Nc6 9.Rg1+=) 9.b5 (9.Nb5 Kd8 10.ba5 Ra5 11.Be5+=) 9...Nf6 (9...d5 10.f4+=) 10.0-0 (10.Na4 d5+=) 10...Be7 (10...d5 11.f4+=) 11.d4 (11.f4 d5+/–) 11...d6 (11...d5 12.Rfe1+=) 12.a4 (12.f4 d5+=) 12...0-0 13.Bd3 (13.f4 d5+=) 13...Nbd7 14.Rfe1 Rfe8 15.h3 c5? (15...d5+=) 16.Ne4?? (better is 16.bc6 Nf8 17.c7+–) 16...Rac8 (16...cd4 17.Bd4 d5 18.Nf6 Bf6 19.Bf6 Nf6 20.f4+=) 17.Ng5 (17.dc5 Ne4 18.fe4 Nc5=) 17...g6 18.Re2?? Nd5 19.Ne4? Nf4 20.Ree1 f5 21.Ng3 Nd3 22.cd3–/+ f4 23.Ne4? d5–/+ 24.Nd2 Bf6 25.Nb3 Kg7 26.Rac1 e5?? 27.Rc2?? h5?? 28.dc5+/– Nc5 29.Nc5 Rc5 30.Rd2?? d4?? 31.Bd4!+– Rd5 32.Bb6 Ra8 33.Rc1 Rb8?! 34.Rc7 Kh6 35.Rc6 Bd8 36.Bc5 Kg7 37.b6 Kf7 38.Kf1 g5 39.d4 g4 40.fg4 h4 41.Rh6 Kg8 42.Rh5 Kg7 43.Re5 Re5 44.de5 Kf7 45.Rd6 Kg7 46.Rd7 Kg6 47.e6 Kf6 48.e7 Be7 49.Re7 Rc8 50.Rc7 Re8 51.b7 (51.b7 Rb8 52.Bd6 Ke6 53.Bf4 Kd5 54.Rd7 Ke4 55.Rd4 Kd4 56.Bb8 Kd5 57.Bf4 Ke6 58.b8Q Kf7 59.Qb6 Ke7 60.Qd6 Kf7 61.Be5 Ke8 62.Qe6 Kf8 63.Qd7 Kg8 64.Qg7#) 1–0. eddie43 – Dutta, ChessWorld.net, 2012.

4.Rb1 cb4= 5.ab4 a5 6.Ba3 ab4 7.Bb4 Nh6 8.Nf3 Ng4 9.e3 b6 10.Bf8+– Rf8 11.Nb5 Ke7 12.Nfd4?? Qf2 0–1. losertoo (1860) – nwishn (1900), net–chess.com, 2006.

4.Bb2 a6 5.bc5 Bc5 6.Nf3 e5? 7.e3?? d6? 8.h3 d5?? 9.Nd5+– Qc6 10.c4 Nd7? 11.Ne5 Ne5 12.Be5 f6 13.Nc7 Kd8 14.Na8 fe5 15.Qh5 Qf6 16.Be2 Qe7 17.Qf3 e4 18.Qf4?? Bd6–+ 19.Nb6 Bf4 20.Nd5 Qg5 21.Nf4 Qa5 22.g4 g5 23.Nd5 h6 24.Nc3 Nf6 25.0-0 h5 26.f3 hg4 27.hg4 ef3 28.Bf3 Ng4 29.Bg4 Bg4 30.a4 Qe5 31.Rf2 Bh3 32.Rb1 Qg3 33.Rg2 Qg2 0–1. valerypavlovich (2120) – nwishn (1900), net–chess.com, 2006.

4.b5 b6 5.Nf3 Bd6 (5...d5!?=) 6.Ne4 Qa1? (better is 6...Qe7+/–) 7.Nd6+– Kf8 8.Nc8 d5 9.d3 Nd7 10.Nd6 Ke7?? (better is 10...Qc3 11.Qd2 Qd2 12.Bd2 Ke7+–) 11.Bg5 f6 (11...Qf6 12.Bf6 gf6 13.Nf5 ef5 14.d4+–) 12.Qa1 Kd6 13.Bh4 Ne7 14.Bg3 e5 15.c4 (15.e4!? a6+–) 15...d4 16.e3 Nf5 17.ed4 Ng3 (17...cd4 18.Nh4 Ng3 19.fg3+–) 18.dc5 Nc5 19.hg3 Rhe8 (19...Rae8 20.Nh4 Kc7 21.Be2+–) 20.Rh7 Rh8 (20...Ne6 21.Be2 Rh8 22.Rh3+–) 21.Rh8 (better is 21.Rg7!? Rhe8+–) 21...Rh8 22.d4 Rh1 (22...ed4 23.Qd4 Ke7 24.Nh4+–) 23.dc5 (23.dc5 Kc5 24.Qb1+–) 1–0. Yannick – Spion, playchess.de, 2005.

4.Rb1 Ne5 5.e4 a5 6.Nb5 Bd6? (6...Qd8!?+=) 7.Nd6 (7.d4!? Nc6 8.e5 Ne5 9.de5 Qe5 10.Be2 ab4 11.ab4 Ra6+–) 7...cd6+/– 8.c3 Nc6 9.d4 ab4 10.cb4 Nd4 11.Bb2 e5 12.Bd4 ed4 13.Ne2 b6 14.Nd4 Ra3 15.Nb5 Ra2 16.Nd6 Kd8 17.Be2 Qc3? (better is 17...Nh6 18.Qd3 Ke7+–) 18.Kf1 Nh6 (18...Re2 19.Ke2 Ke7 20.Nf5 Kd8+–) 19.Rc1 Rd2 (19...Qd2 20.Rc8 Ke7 21.Qd2 Rd2 22.Rh8 Rd6 23.g4+–) 20.Rc3 Rd1 21.Bd1 Ba6 22.b5 Ke7 23.ba6 (better is 23.e5!? Bb5 24.Nb5 f6 25.ef6 Kf6+–) 23...Kd6 24.Bf3 Ke5 25.Ke2 Ra8 26.Ra1 f6 27.Rc7 Ke6 28.e5! Rb8 29.a7 Ra8 30.Ba8 Nf7 31.Bb7 Nd8 32.a8Q Nb7 33.Qb7 Ke5 34.Rd7 g5 35.Ra4 Kf5 36.Qe4# 1–0. irish paddy – snake2, ChessWorld.net, 2012.

4.Bb2 d5 5.Nd5!+/– Qd8 (5...ed5 6.Bf6) 6.Nc3 e5 7.Nf3 Bf5 (7...a6 8.e4+/–) 8.e4+– Bg4 9.Bb5 Qd7 (better is 9...Nge7!?+–) 10.Ne5! Qe6?? (10...Ne5 Exploits the pin 11.Bd7 Theme: Double Attack) 11.Ng4 a6 12.Bc6 Qc6 13.Nd5 Ne7 (13...0-0-0 14.Nge3+–) 14.Ne5 Qd6 15.Qh5 g6 (15...Ng6 16.Qf5 f6 17.Ng6 hg6 18.Qg6 Kd8 19.Nf6+–) 16.Qf3 Qe5 (16...Nd5 17.Qf7 Kd8 18.Ng6 Qg6 19.Qd5 Bd6 20.Bh8 Kd7+–) 17.Be5 Nd5 18.Bh8 Nb6 19.Bd4 Nc4 20.e5 Rd8 21.Qc3 b5 22.d3 Nb6 23.Bb6 cb6 24.Qc6 Ke7 25.Qb7 Ke6 26.Qb6 Ke5 27.f4! Kf4 28.Qf6 Kg4 29.h4 Rd4 (29...Re8 30.Kf1 Re1 31.Re1 Bb4 32.Qf3) 30.Qf3 1–0. lucya (2135) – dlmUSA, GameColony.com, 2002.

4.Bb2 e5!?=.

4.Nb5 Qa1 5.Nc7 Kd8 6.Na8 Bd6 (better 6...b5 7.Nf3 Bb7=+) 7.Nf3+/- Qb1 (7...b5 8.Ng5 Nh6=) 8.b5?? (better 8.d4 Nf6 9.e4 Nb4 10.ab4 Bb4 11.Ke2 Ne4 12.Bg5 f6 13.Qb1 Nc3 14.Kd3 Nb1 15.Be2+/-) 8...Ba3?? (8...Qb5 9.e3 Qa5 10.Bb2=) 9.bc6 (9.Ba3 Qb5 10.Bf8 Nge7 11.Bg7 Rg8+-) 9...Bb2?? (9...Qc1 10.c7 Ke7 11.Qc1 Bc1 12.e3=) 10.cb7 (better 10.Bb2 Qb2 11.c7 Ke8 12.e3+-) 10...Bb7+= 11.Bb2 Qd1?? (better 11...Qb2 12.e3 Ba8+=) 12.Kd1+- Ba8 (12...f6 13.Bd4+-) 13.Bc1 (better 13.Bg7 Ke7 14.Bh8+-) 13...Ke8 14.c3 0-1. opperwezen (2185) - jokido (2315), Casual Crazyhouse game, lichess.org, 2016.

4.e3 Nge7 5.Bb2 Ne5?? (5...e5 6.Bc4 (6.Qf3+= Qe6 7.Nb5 Kd8 8.Nh3 f6 9.Nc3 d5 10.b5 Nb8 11.e4=; 6.Be2 a6 7.Bf3 d6 8.b5 Nd8 9.ba6 Ra6 10.d4 ed4 11.ed4=) 6...d6 7.Nb5 Kd8 8.Qf3 Be6 9.Be6 Qe6 10.Nh3 f5 11.d3=; 5...Rb8 6.b5 (6.Nf3 a6 7.Bc4 b5 8.Be2 d5 9.0-0 e5 10.Ne1 d4 11.ed4=) 6...Na5 7.Nf3 d6 8.Na4 Qg6 9.Bc3 b6 10.Bd3 Qg4 11.Nb2+=; 5...Nf5 6.Nf3 (6.b5 Ne5 7.Nf3 Nf3 8.Qf3 d5 9.g4 Nd6 10.Qf6 gf6 11.g5=) 6...Bd6 7.Rb1 0-0 8.Ne4 Qe7 9.b5 Nb8 10.g4 Nh6 11.Nd6+=) 6.Rb1?? (6.f4 N5c6 7.Nd5 Qb2 8.Nc7 Kd8 9.Na8 b5+–) 6...N7c6 7.Ne4?? Qe7?? 8.f4?? Ng6+= 9.Nf3 f5 10.Nc5 d6 11.Nb3 Nh4 12.Nh4 Qh4 13.g3 Qe7 14.Bg2 Bd7 15.0-0 0-0-0 16.Qf3 e5 17.fe5 de5 18.Nc5 e4 19.Qe2 Be6?? 20.Bh3 Rg8?? 21.Bf5 Bf5 22.Rf5 Qe8 23.Qg4 Kb8? 24.Rbf1?? g6 25.Rf6 Bc5= 26.bc5 Rd2 27.R1f2 Rf2 28.Kf2 Na5 29.Re6 Qd7 30.Re4 Rf8 31.Ke2?? Qb5–+ 32.Kd2 Qb2 33.Rf4 Rd8 34.Rd4 Nb3 35.Kd1 Nd4 36.ed4 Rd4 (36...Rd4 37.Qd4 Qd4 38.Kc1 Qg1 39.Kb2 Qh2–+) 0–1. Mr.Oldenslo – snake2, ChessWorld.net, 2011.

4.Nf3 d5 5.e3 Bd6 6.Bb2 Nge7 7.Be2 Qg6 (7...0-0 8.Ra2 e5 9.Nb5=) 8.0-0 0-0 9.Nb5 Bd7 (9...e5 10.Nd6 cd6 11.d4=) 10.Nd6+= cd6 11.d4 f6 (11...a6 12.Qd2+=) 12.c4 dc4 13.Bc4 Rac8 14.Rc1 d5 (14...d5 15.Bd3 Qh5+/-). opperwezen (2195) - jokido (2315), Casual Crazyhouse game, lichess.org, 2016.

4.d4 d5 5.Nb5 Na6 6.Nh3 Qe7 7.Bf4 Ng4 8.f3 Nf6 9.Qd3 Nh5 10.e3 Nf4 11.Nf4 c6 12.Nc3 e5 13.de5 Qe5 14.Qd4 Qd4 15.ed4 Bd6 16.Bd3?? Bf4–+ 17.Kf2 0-0 18.g3 Bd2 19.Ne2 Bh3 20.g4–/+ h5 21.gh5? Rae8 22.Nf4 Bf4 23.h6 gh6 24.Rhg1 Bg5 25.Rg3 Bd7 26.h4 f6 27.hg5 fg5 28.Rh1 Rf6 29.Rg4 Bg4 30.Be2 Re2! 31.Ke2 Rf3 32.Rg1 h5 33.Rg2 Rf4 34.Ke3 Rf3 35.Kd2?? Nc7 36.Re2 h4 37.Rh2 h3 38.c3 Nb5 (38...Nb5 39.Rh1 Nc3–+) 0–1. Barry49434 – Doobi, ChessWorld.net, 2005.

4.e3 a6 5.Nf3 Bd6 6.d4 Nc6 7.Bb2 b5 8.Bd3 Bb7 9.0-0 e5 10.de5 Ne5= 11.Be2 Bf3 12.Bf3 Rc8?? 13.Bb7+– Rb8 14.Ne4 Qg6 15.Nd6 cd6 16.Ba6 (16.Ba6 Rb6 17.Bc8+–; better is 16.Qd5!?+–) 1–0. Whiterose – vulpo, ChessWorld.net, 2005.

4.bc5+= Bc5 5.Bb2 Bb6 6.c4 Ba5 7.Nc3 Nc6 8.e3 Nh6 9.Nf3 0-0 10.Be2 b6 11.0-0 Bb7 12.Ne4 Qg6 13.Bd3 f5 14.Nd6 Rab8 15.d5 ed5 16.cd5 Ne7 17.Nb7+/– Rb7 18.d6! Nc6 19.Bc4 Kh8 20.Qb3 Qd6= 21.Rad1 Qg6 22.Bd5 Rc7= 23.Rc1 Rfc8 24.Be5 Nd4?? 25.Qb2 Rc1 26.Rc1?? Rc1 (26...Rc1 27.Qc1 Ne2 28.Kf1 Nc1–+) 0–1. alaamattar (2100) – eightyone (2130), net–chess.com, 2007.

4.bc5 Bc5 5.Bb2 Bb6 6.c4 e5 7.e3 (7.c5 Bc7+=) 7...ed4 Black is in command 8.ed4 (8.Bd4 Bd4 9.Qd4 d6+=) 8...Nc6 d4 seems the pivot of the position 9.c5 (9.Nf3 Nge7=) 9...Bc5 10.Bd3?? (10.dc5 A pinning theme 10...Qb2) 10...Bd4–+ 11.Bd4 Qd4 12.Qe2 (12.Ra2 Nge7–+) 12...Nge7 13.Qa2?? (better 13.Ra2–+) 13...Qd3 14.Ne2 Qe4 (14...0-0 15.Nbc3–+) 15.0-0 Nf5 16.f4 (16.Nd2 Qe6–+ (worse 16...Qe2 17.Rae1 Qe6 18.Re6 fe6 19.Nf3–+)) 16...Nh4 (16...Ne3 17.Nec3 Qd4 18.Nb5–+) 17.Nbc3 (17.Nec3 Qd4 18.Kh1–+) 17…Qg2 0–1. pat_cash87 – jeanauthnan, lichess.org, 2020.

4.Bb2 Nc6 5.e3= Nh6 6.g3 a6 7.Nh3 e5=+ 8.de5 Ne5–/+ 9.Be5 Qe5 10.c3 Bg4 11.f3 Qe3 12.Qe2 Qe2 13.Ke2 Bh3 14.Bh3–/+ Bd6 15.Kd2 0-0 16.f4 b5 17.Kc2 f5 18.Nd2 c6 19.Rhg1 Rfe8 20.g4? Bf4 21.Nf3 Re2 22.Kb3 Rf2 23.Nd4 Rh2 24.Bf1 Be3 25.Rg2 Rh3 26.gf5?? Bd4 27.Rc1 Bf6 28.Re2 Rg3 29.Rce1 Rc3 30.Ka2 Nf5 31.Re6 Rc2 32.Kb1 Rb2 33.Kc1 Rc8 34.Be2 Ra2 35.Bh5 Bg5 36.Kb1 g6 37.Bg4 Ra3 38.Kb2 Rg3 39.Bd1 Rg2 40.Kb1 Nd4 41.R6e5 Bh4 42.Rh1 Bf6 43.Re3 Nf5 44.Reh3 Rb2 45.Kc1 Rb4 46.Rh7 Bb2 47.Kc2 Nd4 48.Kd3 Nf5 49.R7h2?? Kf7 50.Rh7 Kf6 51.Rg1 a5 52.Rh2 Be5 53.Rhg2 Rd4 54.Kc2 Ne3 55.Kc1 Ng2 56.Rg2 Rh8 57.Rf2 Ke6 58.Bg4 Rg4 59.Rc2 Rh1 60.Kd2 Rg2 61.Kd3 Rd1 62.Rd2 (62.Ke3 Bd4 63.Kf3 Rc2 64.Kg4 Rg1 65.Kh3 c5 66.Kh4 Rh2) 0–1. crazy 8 – vulpo, ChessWorld.net, 2005.

4.Nf3 Nc6 5.Bg5 Qg6 6.e3 h6 7.Bd3 Qh5 8.Bf4 Qg4?? 9.h3+– Qg2 10.Rh2 Qf3 11.Qf3 Bd7 12.Bc7 Nge7 13.Nc3 Nc8 14.Nb5 f5 15.Qh5 g6 16.Qg6 Ke7 17.Be5 Ne5 18.de5 Be8 19.Qf6 Kd7 20.Qh8 Ke7 21.Qf6 Kd7 22.Qf8 Nb6 23.Qd6 Kc8 24.Qc7 1–0. touchdown – Doobi, ChessWorld.net, 2005.

4.Bb2 c5 5.de5+/– Qf4 (5...Qg6!?+/–) 6.e3+– Qe4 (6...Qf5 7.bc5 Nc6 8.Nf3+–) 7.Nd2 (7.b5 Ne7+–) 7...Qd5 (7...Qg6 8.bc5 Bc5 9.Nc4+–) 8.e4 (8.Nc4!? Qd1 9.Kd1 b6+–) 8...Qe6 9.b5 c4? (better is 9...d5+–) 10.Bc4 (10.Nc4 Nh6+–) 10...Qg6 11.Qf3 (11.Ngf3 a6+–) 11...d5 (11...d6 12.Ne2 de5 13.Be5+–) 12.Bd5 1–0. Wall,Bill – WheeZee, internet, 2001.

4.Bb2 e4=.

4.Nc3 ed4 5.Nd5 Qe5 (5...Qd8 6.Qd4 Nc6 7.Qc3+=) 6.c4+= c6?? (better is 6...Na6 7.Bf4 Qe4 8.Bc7 Ne7+/–) 7.Bf4+– Qe4 8.f3 Qe7 (8...Qg6 9.Nc7 Kd8 10.Na8+–) 9.Ne7 (9.Ne7 Be7 10.Qd4+–) 1–0. pierre – lillogoal, internet, 2006.

4.de5 Qe5 5.Ra2 d6 6.Nf3 Qf6 7.e3 Be6 8.Bb2 Qg6 9.Ra1 a6 10.h3 h6 11.g3 f6 12.Nc3 Nc6 13.Bg2 0-0-0 14.0-0 d5 15.Ne2 d4? 16.ed4 Bd7 17.Nf4+– Qf5 18.d5 Be8? 19.g4 Qf4–+ 20.Qe1 Ne5 21.Ne5–/+ fe5 22.Be5 Qc4 23.Rd1 Qc2?? 24.d6 cd6?? 25.Qc3?? Qc3–+ 26.Bc3 Nf6 27.Rc1 Kb8 28.Ra1 Bc6 29.Bc6 bc6 30.Bf6 gf6 31.Rac1 Kb7 32.h4 d5 33.f4 Bd6 (33...Bd6 34.Kg2 Rhe8–+) 0–1. ajeffries (1645) – nwishn (1900), net–chess.com, 2006.

3.c3 Ng4 4.d4 Qf6 (4...Nf6!?=) 5.e3?? (better is 5.Nh3+=) 5…Qf2 0–1. Norsworthy,Elizabeth – Miller,Cole James, IECG, 1995. (=1.a3 e6 2.b4 Nf6)

3.Nc3 Nc6 4.Bb2 Nb4?? (better 4...d5=) 5.ab4+– Bb4 6.e3 0-0 (6...a5 7.Nb5+–) 7.Bc4 (better 7.Nb5!? a5 8.Bf6 gf6 9.c3+–) 7...a5+– 8.Nf3 d5 9.Bb3 c5 (9...Bd7 10.Qe2+–) 10.0-0 (10.Na2!? Bd7+–) 10...c4 11.Ba2 a4 12.Ne5 (better 12.Rb1!?+–) 12...a3= 13.Bc1 h6 (13...Qd6 14.Ng4 Ng4 15.Qg4=) 14.Qf3 (better 14.Nb5!?+=) 14...Bc3 15.dc3 b5 (15...Qc7 16.Ng4 Ne4=+) 16.Bd2 (16.Nc6 Qd6 17.Nd4=) 16...b4?? (better 16...Qd6 17.Nd3 cd3 18.cd3 e5–/+) 17.cb4 g5?? (better 17...Qc7 18.Qf4 Ne4+=) 18.Bc3 (better 18.Nc6 g4 19.Qf4+– (19.Nd8?! gf3 20.Nc6 Ne4+–)) 18...Ba6 (18...Ne4 19.Bd4 f6 20.Nc4 Kh7+–) 19.Nc6 Qd6 (19...Ne4 20.Nd8 Nc3+–) 20.Qf6 Qc6 21.Qg7 1–0. WarlpiriMan – Jerry135974, ChessWorld.net, 2015.

3.Nc3 g6 4.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 g6 4.Nc3).

3.d3 d5 4.Bb2 Be7 5.Nd2 0-0 6.Ngf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.d3 0-0 6.Nbd2).

3.d4 (--> 1.b4 Nf6 2.d4 e6 3.a3).

3.Nf3 a6 4.d4= g6 5.c4 c6 6.Bg5 Be7 7.Bh6 Ne4 8.e3 g5 9.Qd3 f5 10.Be2 g4 11.Nfd2 Nd2 12.Nd2 Bg5 13.Bg5+– Qg5 14.0-0 Rg8 15.e4 h5 16.ef5 ef5 17.Rae1 Kd8 18.d5 Rg6 19.Bd1 d6 20.c5 h4 21.dc6 bc6 22.cd6 h3 23.Re7 Nd7? 24.Rfe1 Rg8 25.Ba4 Bb7 26.Nc4 g3 27.fg3 hg2 28.Rd7! Kd7 29.Re7 Kd8 30.Rb7 Re8 31.Kg2 Qg4 32.Re7 Re7 33.de7 Ke8 34.Bc6 Ke7 35.Qe3 Kf6 36.Ba8 Qc4 37.Bf3 Qa2 38.Kh3 Qc4 39.Qb6 Kg5 40.Qd8 Kh6 41.Qf6 Kh7 42.Bh5 Qf1 43.Kh4 Qc4 44.g4 fg4 45.Qf5 Kh8 46.Bg4 Qd4 47.h3 Qg7 48.Qh5 Kg8 49.Qd5 Kh8 50.Qh5 Kg8 51.Qe8 Kh7 52.Bf5 Kh6 53.Qh5# 1–0. katabla – larniletter, ChessWorld.net, 2011.

3.Nf3 Nc6 4.Bb2 d5 5.e3 Bd6 6.c4 0-0 7.Nc3 a6 8.Be2 a5 9.b5 Ne7 10.Na4 Ne4 11.d3+= Nc5 12.Nc5 Bc5 13.d4 Ba7 14.c5 c6 15.0-0 cb5+= 16.Bb5 Bd7 17.Qd3 Bb5 18.Qb5 b6 19.c6 Rc8 20.Rfc1 Rc7 21.a4+/– f6 22.Ba3 Rf7 23.Ra2 Nc8 24.Rac2 Nd6 25.Bd6 Qd6 26.Nd2 f5 27.Nf3 f4 28.Ne5 Rf6 29.Rc3 Qb4? 30.Qb4+– ab4 31.Rb3 fe3 32.fe3 g5 33.Rb4 h5?! 34.Nd7 Rf5 35.Nb6 Kg7 36.Na8 Rc8 37.Rb7 Rf7 38.c7 Ra8 39.Ra7! Rc8 40.Rb7 Rff8 41.a5 Kf7 42.a6 Ke7 43.a7 Kd7 44.a8Q! Ra8 45.c8Q Kd6 46.Rc6 (46.Qc6) 1–0. kiloracer (1800) – dmills (1870), net–chess.com, 2005.

3.f4 a5 4.b5+=.

3.f4 c5 4.b5 (4.bc5 Bc5 5.e3 d5+=) 4...a6 (4...Ne4 5.Nf3+=) 5.e3 d5 6.Nf3 Nbd7 (6...Be7 7.Bb2+=) 7.Bb2 Be7 (7...c4 8.ba6 Ra6 9.d3+=) 8.a4 (8.Be2 0-0=) 8...0-0 9.Na3 (9.Be2 Ne4+=) 9...c4–/+ 10.ba6 (10.Be2 Nc5–/+) 10...ba6 (10...Ra6 11.Nb5–/+) 11.Be2 Nc5 12.0-0 Na4 (12...Bd7 13.Bd4–/+) 13.Nc4+= Bd7 (13...Nb2 14.Nb2 Qc7 15.c4+=) 14.Bf6= Bf6 15.Nce5 Qc7 (15...a5 16.Nd4 Nc5 17.c3+=) 16.Qe1 (16.c4 Nb6 17.cd5 Nd5 18.Ra6 Ra6 19.Ba6 Ra8+=) 16...Rfc8 (16...Bb5 17.Bb5 ab5 18.c3=) 17.Qg3 (17.c3 Rcb8=) 17...a5 (17...Bb5 18.Bb5 ab5 19.c3=) 18.Nd4 (18.Ng5 A) worse is 18...Qc2 A1) 19.Nd7 Ba1 20.Bh5 g6 21.Ra1 Qd2–/+ (21...gh5 22.Ne4 Kh8 23.Nd6+–); A2) 19.Bd3 Qc7 20.Bh7 Kf8 21.Ngf7+/–; B) 18...Be8=) 18...Nc5+= 19.d3 a4 20.Ng4 Qd8 (20...Be7 21.Nh6 Kf8 22.Ng4+=) 21.Bf3 (21.Nf6 Qf6 22.Bf3 Rab8+=) 21...Bh4–/+ 22.Qh3 a3 (22...e5!? 23.fe5 h5–/+) 23.Ne5+= Be7 (23...Bf6 24.Ra2+=) 24.f5 (better is 24.Ra2=) 24...f6?? (better is 24...Bf6 25.fe6 Be6 (25...Be5 26.ed7 Nd7 27.Bd5 Bd4 28.ed4+/–; 25...fe6?! 26.Nd7 Qd7 27.Bg4+=; 25...Ne6 26.Bh5 Be5 27.Bf7 Kh8 28.Be6 Bd4 29.Bd7 Ba1 30.Bc8–/+) 26.Ne6 Ne6–/+) 25.fe6+– Be8 26.Nf7! Bf7 (26...Qc7 27.Bd5 Ra6 28.Nf5+–) 27.ef7 Kh8 28.Bg4 Rc7 (28...Bf8+–) 29.Bf5 h6 30.Qh5 Nd7 31.Ne6 Qb8 (31...Ne5 32.Nd8 Rd8+–) 32.Qg6 (32.Qg6 Qg8 33.fg8Q Kg8 34.Qg7) 1–0. Quabach,Juergen (1835) – Anger,Robert, Passau op 7th, 1999.

3.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3).

3.Bb2 a5 4.b5 d5 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5).

3.Bb2 a6 4.g3 d5 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.g3 a6).

3.Bb2 b6 4.e3 Bb7 5.Nf3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7).

3.Bb2 b6 4.Nf3 Bb7 5.Nc3 d5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.Nc3).

3.Bb2 b6 4.Nf3 Bb7 5.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3).

3.Bb2 b6 4.Nf3 Be7 5.g3 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3 Nf6 5.a3 Be7).

3.Bb2 Nc6 4.e3 Be7 5.Nf3 0-0 6.d4 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.d4 Nc6).

4.b5 a5 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 a5 4.b5 c5).

4.b5 d5 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5).

4.b5 d5 5.e3 Bd6 6.Nf3 Nbd7 7.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3 0-0 7.c4 Nbd7).

4.b5 d5 5.Nf3 a6 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 a6 6.Nf3).

4.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3).

4.e3 c6 5.Nf3 Bd6 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 0-0 6.c4 c6).

4.e3 Bd6 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3).

4.e3 Be7 5.c4 c6 6.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6).

4.e3 Be7 5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 Be7).

4.Nf3 a6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6 5.Nf3).

4.Nf3 b6 5.d4 Bb7 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.d4).

4.Nf3 c5 5.bc5 Bc5 6.e3 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6).

4.Nf3 Be7 5.g3 Nbd7 6.Bg2 0-0 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.g3 Be7 5.Bg2 0-0 6.Nf3 Nbd7).

(--> 2.Bb2 Nf6 3.a3 Be7).

4.c4 d5 5.e3 0-0 6.Nf3 Nbd7 7.Nc3 c6 (---> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.Nc3 Nbd7).

4.d4 (--> 1.b4 Nf6 2.d4 e6 3.a3 Be7 4.Bb2).

4.e3 0-0 5.c4 d5 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4).

4.e3 b6 5.Nf3 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Be7).

4.e3 d5 5.c4 0-0 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4).

4.e3 d5 5.c4 0-0 6.Nf3 Nbd7 7.d4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.d4 Nbd7 7.c4).

4.e3 d5 5.c4 0-0 6.Nf3 Nbd7 7.d4 c6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4 Nbd7).

4.Nf3 0-0 5.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 Be7 4.e3 0-0 5.Nf3).

4.Nf3 0-0 5.g3 d5 6.Bg2 (--> 2.Bb2 Nf6 3.a3 d5 4.g3 Be7 5.Bg2 0-0 6.Nf3).

4.d4+=.

4.f3 Bd6–/+ 5.e3 0-0 6.Bd3 Nfd7 7.f4 e5 8.fe5 Ne5 9.Be2 Qg5 10.g3 Re8 11.d4 Ng4 12.Bg4 Bg4–+ 13.Qd2 Nd7 14.Ne2 Qh5 15.Ra2 Qh3 16.Ng1? Bg3! (16...Bg3 17.hg3 Qh1–+) 0–1. chsen – luciano59 (2110), internet, 2006.

4.e4 d6 (4...a5 5.b5=) 5.Nf3+= Be7 6.d4 0-0 7.Bd3 c5 8.dc5 (8.bc5 dc5 9.e5 Nd5 10.Nd5 ed5+= (worse 10...Qd5 11.c4 Qd7 12.d5+–)) 8...bc5 (8...dc5 9.bc5 Bc5 10.e5+=) 9.bc5 Qc7 (9...Nc6 10.0-0+=) 10.Nb5 (10.cd6!? Qd6 11.e5+–) 10...Qc5+= 11.Be3 Qh5 12.Nc7?? (better 12.0-0 Nc6 13.Nfd4 Nd4 14.Qh5 Nh5 15.Nd4+=) 12...Qa5–+ 13.Bd2 (13.Qd2 Qc7 14.Nd4 Ng4–+) 13...Qc7 14.0-0 Bb7 15.Re1 (15.Qe2 Nc6–+) 15...Nbd7 16.c4 (16.Nd4 Nc5 17.f3 d5–+) 16...Nc5 17.Qc2 e5 18.Rab1 Bc6 19.Bb4 a5 20.Bc5 dc5 21.Qc3 Nd7 (21...Bd6 22.Qd2–+) 22.Rb2 (22.Red1 Rfd8–+) 22...Rfb8 23.Reb1 Bf6 24.Rb8 Rb8 25.Rb8 Nb8 26.Bc2 Nd7 27.Nd2 Nf8 28.a4 (28.Nb3 Ba4–+) 28...Ne6 29.g3 h6 30.Nb1 (30.Nf3 Nd4 31.Nd4 cd4–+) 30...Nd4 (30...Qb7 31.Qd3–+) 31.Kf1 (31.Qd3 Qb6 32.Bd1 Qb4–+) 31...Qd7 32.Bd3 (32.Kg2–+) 32...Qh3 33.Ke1 Qg2 (33...Bg5 34.Bf1 Qh2 35.Nd2 Bd2 36.Qd2 Nf3 37.Ke2 Nd2 38.Bg2 Qg2 39.g4 Nc4 40.Kd3 Qe4 41.Kc3 Ba4 42.f4 Qd4) 34.Qa5 (34.h4–+) 34…Be4 (34...Be4 35.Qd2 Qh1 36.Bf1 Bb1–+) 0–1. Eigenmann,Peter – Gudat,Alfons (2035), Schleswig Holstein–ch Seniors, 2009.

4.Nf3 Bb7 5.d4 d6 6.e3 Be7 7.Na4 0-0 8.c4 Nbd7 9.Be2 c5 10.0-0 Qc7 11.Bb2 Rfd8 12.Rc1 Rac8 13.Re1 Qb8 14.Bd3 Qa8 15.Qe2 cb4 16.ab4 a6 17.e4 Bc6 (17...b5!? 18.cb5 ab5+=) 18.Nc3+/- White prepares the advance b5 18...Bb7 19.b5 ab5 20.Nb5 Bf8 21.Ra1 Qb8 22.e5 (22.Nd2!?+/-) 22...de5+= 23.de5 Ne8 (better 23...Nc5!? 24.Bc2 Ne8+=) 24.Bh7!+- Kh7 25.Ng5 Kg6 26.Qd3 Kg5?? (26...f5 27.Ne6 Bb4 28.Nf4 Kh7 29.Qf5 Kg8 30.Qe6 Kh8+-) 27.Bc1 Kh5 28.Qh7 Kg4 29.Qh3 (29.h3) 1-0. PEREIRA – Mossiey, internet, 2021.

4.bc5= Bc5 5.d4 Qa5 6.Bb2 Bb6 7.Qd2 d5 8.e3 a6 9.Rb1 Nc6 10.Bc1 Ba7 11.Be2 Qc7 12.Nf3 0-0 13.0-0 e5 14.de5+= Ne5 15.Nd4 Bb8= 16.g3 Bh3 17.Re1 Rc8 18.Bf1? Bf1–+ 19.Kf1 Qc3 20.Rb7 Qd2 21.Bd2 Ne4 22.Rd1 Nd2 23.Rd2 Nc4 24.Rd3 Ra7 25.Ra7 Ba7 26.a4 Bd4 27.Rd4 Rc5 28.e4 Kf8 29.ed5 Ke7 30.c3 Kd6 31.Kg2 Na3 32.f4? Rd5 33.Rb4 Kc6 34.h4 a5 35.Rb3 Nc4 36.Kh3 Nb6 37.Ra3 Rc5 38.Kg4 Nd5 39.h5 h6 40.Rb3 Kc7 41.f5 f6 42.Kf3 Rc3 43.Rc3 Nc3 (43...Nc3 44.Ke3 Na4–+) 0–1. pillsbury (1995) – joelag (2425), net–chess.com, 2007.

4.bc5 Bc5 5.d4 Be7 6.e4 0-0 7.Nf3 d6 8.Be2 Bd7 9.0-0 Na6 10.h3 Rc8= 11.Bb2 h6 12.Bd3 Re8 13.Qe2 Nc7 14.a4 Bf8 15.Nd1 g6 16.c4 Bg7 17.d5 ed5–/+ 18.cd5 Ncd5! 19.Qd2 Nb6 20.Ne3 Na4–+ 21.Bd4 a6 22.Rfc1 b5 23.Bc2 Qe7 24.Nd5 Nd5 25.ed5 Qf8 26.Nh4? Rc4 27.Ng6? fg6 28.Bg7 Qg7 29.Ba4 Rc1 30.Rc1 ba4 31.Rc7 Re7 32.Qa5 Qa1 33.Kh2 Qe5 34.Kg1 Qe1 35.Qe1 Re1 36.Kh2 Re7 37.Ra7 Kf7 38.Ra6 Kf6 39.Rd6 Kf5 40.Ra6 Rg7 41.Kg3 Ke5 42.Ra5 Kd6 0–1. alaamattar (2100) – alexp (2120), net–chess.com, 2005.

4.b5 Bd7 5.e3 Bd6 6.f4 c6 7.bc6 Nc6 8.Nb5 Be7 9.d4 a6–/+ 10.Nc3 Rc8 11.g4 h6 12.h4 Na5 13.Bd2 Nc4 14.g5 hg5 15.fg5 Ne4 16.Bc4? Nc3–+ 17.Bc3 Rc4 18.Qd2 Qc8 19.a4 Rc3 20.Kd1 Bb4 21.Ne2 Rc4 22.Qc1 b5 23.Nf4 Qc7 24.Rh2 Bd6 25.Rd2 Rh4 26.Ke2 Bf4 27.ef4 Qf4 28.Qf1 Rh2 29.Ke1 Qd2 0–1. Hopefor1 – ANZARBOND (1725), internet, 2007.

4.e3 Nbd7 5.Be2 c5 6.b5 a6 7.ba6 ba6 8.Bb2 Be7 9.Nf3 0-0 10.d4 cd4 11.Nd4 Bb7 12.0-0 Nc5 13.Nb3 Qc7 14.Bf3 Rab8–/+ 15.Rb1 Rfc8 16.Nd4 Bd6 17.g3 Ncd7 18.a4 Ne5 19.Bg2 h6 20.Re1 Bb4 21.Nde2 Nc4 22.Ba1 a5 23.Qd4 Ba6 24.Red1 Bc5 25.Qh4 Be7 26.Qf4 Rb1 27.Nb1 Bd6 28.Qh4 Be5 29.Nd4 Qd7 30.c3?? Qa4–+ (30...Qa4 31.Bf3 Qa1–+) 0–1. mic (2200) – johnb (2130), net–chess.com, 2007.

4.Nf3 (--> 3.Nf3 d5 4.Nc3).

3.c4 (--> 1.b4 Nf6 2.c4 e6 3.a3).

3.c4 c5 4.b5 d5 5.e3 Bd6 6.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.c4).

3.c4 Be7 4.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 Be7 4.c4).

4.b5 d5 5.Bb2 Nbd7 6.Nf3 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 c5 6.e3 Nbd7).

4.b5 d5 5.Qf3 Be7 6.a4 c5 7.d3 0-0 8.h3 e5 9.e4 de4 10.de4 Qd4 11.c3 Qe4–/+ 12.Qe4 Ne4 13.Bd3 Nd6 14.Be3 e4 15.Bc4?? Nc4–+ 16.Ne2 Ne3 17.fe3 b6 18.Nd2 Bf5 19.g4 Bg6 20.h4 h5 21.gh5 Bh5 22.Ne4 Be2 23.Ke2 Nd7 24.h5 f5 25.Nf2 Nf6 26.h6 gh6 27.Rh6 Nd5 28.Rg1 Kf7 29.Kd3 c4 30.Kd2 Bf6 31.Nd1 Rad8 32.Kc2 Ke6 33.Rg7 Rf7 34.Rg2 Ne7 35.Nb2 Rd3 36.Nd3=+ cd3 37.Kd3 Nd5 38.Rg8? Rd7–+ 39.Re8 Kf7 40.Rb8 Nc3 41.Kc2 Na4 42.Rh7 Ke6 43.Rh6 Rc7 44.Kd1 Nc3 45.Ke1 Nd5 46.Ke2 Kf7 47.Rh7 Bg7 48.Rd8 Nc3 49.Kf3 Kg6 50.Rh4 Nb5 51.Rb8 Rc6 52.Rh1 Nd6 53.Rg1 Kf6 54.Rb1 b5 55.Kf4 Bh6 56.Kf3 b4 57.Ra8 Nc4 58.Ke2 Be3 59.Kd3 f4 60.Rh1 Ne5 61.Ke2 Rc2 62.Kd1 Rc1 63.Ke2 Rh1 64.Ra5 Rh2 65.Kf1 f3 66.Rb5 Rh1# 0–1. ChessNo1 – Chairboy, ChessWorld.net, 2005.

4.b5 d5 5.Nf3 (--> 3.Nf3 d5 4.e3 a5 5.b5).

4.Bb2 Bb7=.

4.Bb2 Be7 5.Nf3 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Be7).

4.c4 Bb7 5.Nf3 Be7 6.d4 d6 7.Nbd2 0-0 8.Bb2 (8.Bd3 c5=) 8...Nbd7 (8...a5 9.Bd3=) 9.Be2 (9.Bd3 c5=) 9...c5 10.0-0 Rc8 (10...Qc7 11.Bd3=) 11.Qc2 (11.Qa4 cd4 12.Nd4 a6=) 11...Qc7 (11...cd4 12.Nd4 d5 13.Rad1=) 12.Rad1 (12.Rfd1 cd4 13.Nd4 a6=) 12...Rfd8 (12...cb4 13.ab4 a5 14.Ra1=) 13.Qb1 (13.dc5 dc5 14.b5 Ra8=) 13...Qb8 (13...cb4 14.ab4 a5 15.Ba3=) 14.e4 cd4 (14...d5 15.ed5 ed5 16.bc5 bc5 17.Rfe1=) 15.Nd4 Qa8 16.f3 a6 (16...a5 17.Qd3=) 17.Rfe1 (17.Qd3 a5+=) 17...Bf8 (17...Nh5 18.g3=) 18.Bf1 (18.Qd3 Be7+=) 18...Qa7 19.Kh1 Ba8 (19...Qb8 20.Qd3=) 20.Qd3+= g6 21.Qe3 (21.Be2 Bh6=) 21...Bg7= 22.N4b3 (22.g4 h6=) 22...Ng4 23.fg4 Bb2 24.a4 Qb7 (24...Bc6 25.a5=) 25.Be2 (25.g5 Bg7=) 25...Bg7 (25...Qc7 26.c5 dc5 27.Ba6=) 26.Rb1 (26.g5 a5 27.b5 Qc7=) 26...Ne5 (26...Qc6 27.b5 ab5 28.ab5+=) 27.a5 (27.g5 f6=) 27...ba5 28.Na5 Qe7 29.g5 Qc7 (29...f6 30.Rec1=) 30.Rec1 (30.Rf1 Rf8=) 30...Rb8 31.Rb3 Rdc8 (31...Qb6 32.Qb6 Rb6 33.c5 dc5 34.bc5 Rb3 35.Nab3=) 32.Rcb1 (32.c5 dc5 33.Rc5 Qd6=) 32...Bc6 (32...f5 33.gf6 Bf6 34.c5=) 33.Nc6 Nc6 34.Nf3 Ne5 (34...a5 35.b5 Nb4 36.Rf1=) 35.Ne5 Be5 36.Qf2 Qe7 37.Qh4 Qf8 (37...f6 38.gf6 Bf6 39.Qh3=) 38.Qf2 (38.Rf3 Qe7=) 38...Qe7 39.Qh4 Qf8 (39...f6 40.gf6 Bf6 41.Qh3=) 40.Qf2 ½–½. Weng,Annegret – Elschner,Annegret, Nordrhein–Westfalen–Sachsen, 2000.

4.bc5 Bc5 5.d4 Qa5?? (better is 5...Be7=) 6.Bd2+– (6.Bd2 Qc7 7.dc5 Qc5 8.Bb4+–) 1–0. b4_player – opponent, internet, 2008.

4.bc5= Bc5 5.d4 Bb6 6.Nf3 0-0 7.Bd3 d5 (7...d6 8.0-0=) 8.0-0 Nc6 9.c4 (9.Nbd2 Bc7=) 9...dc4 10.Bc4 Qd6 (10...Bd7 11.Bd3=) 11.Nc3 Rd8 12.Bb2 a6 (12...Ba5 13.Rc1=) 13.Rc1 Bc7 14.Qc2 Bd7 15.Bd3 (15.Rfd1 Rac8+=) 15...Rac8 16.Rfd1 Bb8 17.Qb1 h5 (17...b5 18.Ne4 Ne4 19.Be4+=) 18.Ne4 Ne4 19.Be4 Na5 (19...Qe7 20.Rc3+=) 20.Bh7 (20.Rc8 Bc8 21.Ne5 f6 22.Bh7 Kf8 23.Ng6 Kf7+–) 20...Kh8+= 21.Ne5 (21.Bd3 b5+=) 21...Be8 22.Bd3 b5 23.Rc8 (23.Bc3 Nc6 24.Be4 Ne5 25.de5 Qc7+/– (25...Qa3 26.Rd8 Rd8 27.Bb4 Qc1 28.Qc1 Be5 29.Ba5+–)) 23...Rc8 24.Rc1 Rc1 25.Qc1 Nc6 (25...Qd8 26.Qd1 f5 27.Qe2+=) 26.Be2 (26.Qd1 f5+=) 26...f6+= 27.Qc6 Bc6 28.Nf7 Kh7 (28...Kg8 29.Nd6 Bd6 30.Bh5=) 29.Nd6 Bd6 30.Bh5 a5 31.Bg4 (31.Bf7 Bd5+=) 31...f5 32.Bh5 (32.Be2 b4 33.ab4 ab4+=) 32...g6 (32...g5 33.f3=) 33.Bf3 (33.Be2 a4=) 33...Bf3= 34.gf3 g5 35.h3 (35.e4 Kg6=) 35...a4 (35...b4 36.a4+=) 36.Kf1 (36.e4 Kg6=) 36...b4 37.ab4 Bb4 The passed pawn on a4 will quickly become a dangerous weapon 38.Ke2 a3 39.Ba1 Kg6 40.Kd3 (40.e4 Kh5=) 40...Kh5 (40...Be1 41.Ke2 Ba5 42.e4=) 41.e4 fe4 (41...Kh4 42.Kc4 Be7 43.d5 ed5 44.Kd5 fe4 45.fe4 Kh3 46.e5+=) 42.fe4 Kh4 43.Kc4 Be7 44.d5 ed5 45.ed5 The passed pawn on d5 quickly leads to threats (45.Kd5 Kh3 46.e5 Kg2+=) 45...Kh3 46.Be5 g4 47.d6 Bh4 (better is 47...Bd6!? 48.Bd6 a2+=) 48.Bd4+= a2 49.d7 ½–½. Ventimiglia,Charles – Hyett,Kevin Steven, IECG, 1998.

4.bc5 Bc5 5.d4 Bb6 6.Nf3 d6 7.Be2 Nc6 8.Bb2 0-0 9.0-0 Re8 10.c4 e5 11.de5 de5 12.Qc2 (12.Qd8 Bd8 (worse is 12...Rd8 13.Ne5 Ne5 14.Be5+/–) 13.Nc3 Bg4=) 12...e4 13.Rd1 Qe7 14.Nfd2 (14.Nd4 Nd4 15.Bd4 Bd4 16.Rd4 Bg4=) 14...Ng4+= 15.Nf1 Qh4 16.g3 Qh3 (16...Qg5 17.Rd5 Bf5 18.Nc3=) 17.Nc3 Bf5 18.Nd5 Nce5 19.Nf4 (19.Nb6?? Nf3 20.Bf3 ef3 21.Na8 Qg2) 19...Qh6 20.h3 1–0. aspasio (2865) – manishkhanchandani (2100), net–chess.com, 2014.

4.bc5= Bc5 5.d4 Be7 6.c4 (6.Nf3 d5=) 6...d5 (6...0-0 7.Bd3=) 7.Nf3 a6 (7...Nc6 8.cd5 ed5 9.Bd3=) 8.Nc3 0-0 9.Bb2 (9.c5 Nbd7=) 9...Qa5 (9...Nc6 10.Rc1=) 10.Qa4 Qa4 (10...Qb6 11.Rb1=) 11.Na4 Nbd7 (11...Bd8 12.Nc3=) 12.c5+= b5 (12...Rb8 13.Rc1+=) 13.Nc3 (13.cb6 Rb8+=) 13...Nb8 (13...Ra7 14.Bd3+=) 14.Na2 (14.Bd3 Nc6=) 14...Nc6 (14...Bb7 15.Bd3=) 15.Nb4+= Bd7 (15...Nb4 16.ab4 Bb7 17.Bd3+/–) 16.Bd3 (16.Nc6 Bc6 17.Ne5 Rfc8+=) 16...Na5 17.Bc3 (17.Ne5 Nc4 18.Bc4 dc4 19.Nd7 Nd7+=) 17...Nc4= 18.0-0 (18.Ne5=) 18...Rac8 (18...Rfc8 19.Rfc1=) 19.Nd2 (19.Na6 Ra8 20.Nb4 Na3+/–) 19...Bc6? (19...a5!? 20.Nc2 Bd8=) 20.Nc6 (20.Na6!? Ra8 21.Nb4+/–) 20...Rc6+= 21.a4 Rb8 22.Rfb1 Rcc8 23.ab5 ab5 24.Kf1 Kf8 (24...h5 25.Ke2+/–) 25.Ke2 (25.Rb3 e5+=) 25...Nd7 (25...g6 26.Rb3+/–) 26.Ra2 (26.Bb4 Rc7+/–) 26...Ke8 27.e4 (27.Ra7 Bf6+/–) 27...Bd8 (27...de4 28.Bc4 bc4 29.Rb8 Rb8 30.Ne4+/–) 28.ed5 (28.Bb4 Bc7+/–) 28...ed5 29.Ra6 (29.Nf3+/–) 29...Bf6 (29...g6!?+/–) 30.Bf5+– Rc7 (30...Rd8 31.Kd3 Nf8 32.Re1 Ne6 33.Be6 (33.Bh7?! Kf8+=) 33...fe6 34.Ra7+/–) 31.Nc4 (31.Bh7?! g6+=) 31...dc4 The passed pawn on d4 will quickly become a dangerous weapon 32.Ba5 (32.Bh7 g6 33.Ba5 Rcc8+–) 32...Nc5 33.Bc7 Na6 34.Bb8 Nb8 35.Rb5 (35.d5 g6 36.Rb5 Be5+–) 35...Nc6+/– 36.Rc5 (better is 36.Kd1!? Nd4 37.Rb8 Ke7 38.Bh7+/–) 36...Nd4+= 37.Kd1 c3 (37...Nf5 38.Rf5 Ke7 39.f4+=) 38.Bd3 (38.Rc8 Ke7 39.Bh7+/–) 38...Kd7? (better is 38...Ne6 39.Rb5 g6+=) 39.Rc3+– Kd6 (39...h6 40.Ra3+–) 40.Ra3 (40.Bh7!? g6+–) 40...h6 41.Ra6 Ke7 (41...Kd5 42.Bb1+–) 42.Ra7 (42.Ra7 Ke8 43.Bc4+–) 1–0. Heinola – Maekisarka, Turku–op ch–SF, 1984.

4.bc5= Bc5 5.d4 Be7 6.c4 d6 7.Nf3 0-0 8.Nbd2 Nbd7 (8...Nc6 9.Be2=) 9.Bb2 b6 10.Bd3 Bb7 11.0-0 Rc8 12.Qe2 h6 13.Rfc1 Qc7 14.h3 (14.e4 Rfe8+=) 14...e5 15.Bb1 (15.e4 Nh5=) 15...Rfd8 16.Nh4 Re8 17.Qd3 Bf8 18.Ba2 Qd8 19.Nf5 g6 20.Ng3 Bg7 21.f3 (21.Rab1 Qe7=) 21...Qe7 22.Kf2 ed4 23.ed4 Nh7 24.Re1 Qh4 25.Rab1 f5 26.Re8 Re8 27.Ndf1 f4 (27...Ng5 28.Kg1–/+) 28.Qg6+= fg3 (28...Ndf6 29.Kg1 fg3 30.Ng3+=) 29.Kg1 (29.Ng3 Ndf6 30.Kg1 Qg5 31.Qg5 Ng5+=) 29...Ndf6 (29...Re2 30.Ng3 Rb2 31.Rb2 Qd4 32.Rf2–/+) 30.Ng3+= Qg5 31.Qg5 Ng5 32.c5 d5 33.Kf2 Ne6 34.Bc3 Nd7 35.Ne2 Bc6 36.cb6 Nb6 (Black fights for the Initiative) 37.g4 Nc4 38.Rc1 (38.Bc4 dc4 39.f4 Nc7–+) 38...Bf6 (38...Na3 39.Bb2 Nc4 40.Bc4 dc4 41.Rc4–+) 39.Kg3 (39.Bc4 dc4 40.f4 Bh4 41.Kf1 Be4–+) 39...Bg5 (worse is 39...Na3 40.Bb2 Nc4 41.Bc4 dc4 42.Rc4–+) 40.Ra1 (40.Re1 Na3 41.f4 Bf6–+) 40...Nc7 41.Nf4 (41.Re1 Nb5 42.Bb4 a5 43.Bc4 ab4–+ (43...dc4?! 44.Ba5 Re3 45.Ng1–+)) 41...Re3 (41...Re3 42.Bb4 Bf4 43.Kf4 Ne6 44.Kg3 Nd4–+; 41...Na3?! 42.Bd2 Nc2 43.Rc1 Nd4 44.Rc6 Nc6 45.Nd5 Bd2 46.Nc7 Kf8 47.Ne8 Ke8 48.Bc4–+) 0–1. Glowatzky,Tihomir – Kaminski,Roman, corr or02–020, 2002.

4.bc5= Bc5 5.d4 Be7 6.Bd3=.

4.bc5= Bc5 5.d4 Be7 6.Nf3 Nc6 7.Bd3 0-0 (7...d5 8.0-0=) 8.0-0 b6 (8...d5 9.Nbd2=) 9.c4 (9.e4 d5 10.e5 Nd7=) 9...d5 10.cd5 Qd5 (10...ed5 11.Nbd2=) 11.Bb2 (11.Nc3 Qd7=) 11...Bb7 12.Nc3 Qd7 (12...Qh5 13.Ne4=) 13.Ne5 Qd8 (13...Ne5 14.de5 Nd5 15.Qc2 Nc3 16.Bc3+= (16.Bh7 Kh8 17.Bc3 g6+=)) 14.Rc1 Ne5 (14...Rc8 15.Qe2+=) 15.de5 Nd7 16.Qc2 h6 (16...f5 17.ef6 Nf6 18.Rfd1+=) 17.Rfd1 Qc8 (17...a6 18.Bh7 Kh8 19.Be4+=) 18.Qe2 Nc5 (18...Ne5? 19.Nd5 Bd5 20.Rc8 (20.Be5?! Bc5=) 20...Rac8 21.Be5 Ba3 22.Qg4+–) 19.Ne4 Qc6 (19...Rd8 20.Bd4+=) 20.Qg4+/– Kh8 (20...Rfd8 21.Nd6+=) 21.Nd6 Qc7 22.Nf7!! (22.Nf7 Rf7 23.Qg6+–) 1–0. Ventimiglia,Charles – Popp,Tony, IECC, 1998.

4.Bb2 c5 5.bc5 Bc5 6.Nf3 0-0 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 0-0 7.c4).

4.Bb2 Be7 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3).

4.d4 a5 5.b5=.

4.d4 b6 5.Nf3 c5 6.bc5 bc5 7.c4 Nbd7 (7...cd4 8.Nd4 e5 9.Nc2=) 8.cd5 Nd5 9.Bb2 (9.e4 N5f6 10.Nbd2 Bb7=) 9...Rb8 10.Ra2 Qa5 11.Qd2 Qa4 12.Be2 cd4 (12...Ba6 13.0-0+=) 13.Qd4= Qa5 14.Nbd2 Nb4 15.Bc3 Threatens Qc4 15...Qa3 16.Ra3 Nc2 17.Kf1 Nd4 18.Ra7 Ne2 (18...Nc6 19.Rc7 Nb4 20.Bc4=) 19.Ke2 Bc5 20.Ra5 (20.Ra2 f6=) 20...0-0 (20...f6 21.Ne4 Bb6 22.Ra2=) 21.Rha1 Bb6 22.Rb5 Bc7 (22...Rd8 23.Nc4 Bc5 24.Rb8 Nb8 25.Ba5=) 23.Rb8+= Bb8 24.Bb4 (24.e4 Bb7=) ½–½. Ventimiglia,Charles – Drysdale,Bryan, IECC, 1998.

4.d4 Bd6 5.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Bd6 5.d4).

4.d4 Bd6 5.Bb5 Bd7 6.Bd3=+.

4.d4 Bd6 5.c4 c6 6.Nf3 Nbd7 7.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6 7.d4).

4.d4 Bd6 5.Nf3 (--> 1.b4 e6 TESTI100 2.a3 Nf6 3.Nf3 d5 4.d4 Bd6 5.e3).

4.d4 Be7 5.Nf3= Nbd7 6.c4 0-0 7.Nc3 dc4 (7...a5 8.Qa4=+) 8.Bc4 Nb6 (8...a5 9.b5=) 9.Bd3 Nbd5 10.Na4 (10.Nd5 ed5 11.0-0 Bg4=) 10...c6 (10...a5!?=) 11.e4+= Nb6 (11...Nc7 12.0-0+=) 12.0-0 Na4 (12...a5 13.Nb6 Qb6 14.Qa4+=) 13.Qa4 h6 (13...Qd6 14.e5 Qd5 15.ef6 Bf6 16.Qc2+–) 14.Qc2 (14.Bf4 Bd6 15.Ne5 Nh5 16.Nc6 bc6 17.Bd6 Qd6–+) 14...Re8 (14...a5 15.b5+=) 15.Bd2 (15.Bf4 a5+=) 15...Qb6 (15...Qd6 16.e5 Qd5 17.ef6 Bf6 18.Be4+–) 16.Rac1 Nd7 (16...Rd8 17.Bf4+/–) 17.Rfd1 Bf6 (18.Be3 Qd8+/–; 17...Rd8 18.Bf4+/–). Mack,Lienhard – Zagorski,Franck, CF.2002.0.00024, 2002.

4.Nf3=+.

4.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 Be7 4.e3).

4.Bb2 0-0 5.Nf3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0).

4.Nc3 a6 5.Be2 c6 6.h4 d5 7.h5 h6 8.Bb2 e5 9.Nf3 Qd6 10.Na4= Nbd7 11.Nc5 b6 12.Nd7 Nd7 13.g4 Bb7 14.g5 hg5–/+ 15.d3 0-0-0 16.Qd2 Bf6 17.0-0-0 Rh6 18.d4 e4–+ 19.Nh2 Rdh8 20.Ng4–/+ Rh5 21.Nf6?? Rh1–+ 22.Nd7 Rd1 23.Bd1 Qd7 24.c3 Rh2 25.a4 Qh3 26.a5 b5 27.Qe2 f5 28.c4 bc4 29.b5 cb5 30.Ba3 Kd7 31.Qb2 Qh8 32.Qb4 Qe8 (better is 32...Kc8 33.Qe7 Rh6–+ (33...Rf2?! 34.Bd6 Rc2 35.Bc2=)). solidsteelpole – 2thousand6, Live Game Caissa's Web, 2006.

4.c4 b6 5.d4 c5 6.bc5 bc5 7.d5 (7.Nf3 0-0=) 7...ed5 (7...d6 8.Nf3=) 8.cd5 d6 9.Nc3 0-0 10.Bd2 Nbd7 11.Nf3 Nb6 12.e4 Re8 13.Bd3 (13.Bb5 Bd7 14.Bd3 c4=) 13...Bg4 (13...Nfd7 14.0-0=) 14.h3 Bf3 (14...Bh5 15.Rb1=) 15.Qf3 Nfd7 16.Rb1 (16.Qg3 Bf6 17.0-0 Be5=) 16...Ne5 17.Qe2 Nd3 18.Qd3 Bf6 19.0-0 Qe7 20.Rfe1 Be5 21.Ne2 (21.Nb5 Rab8=) 21...Rab8 (21...f5 22.ef5 Qf7 23.Nf4=) 22.Bc3 (22.Rec1 Qf6=) 22...Nd7 (22...f5 23.Qa6=) 23.Qa6 Rb1 24.Rb1 Bc3 25.Nc3 Qe5 26.Nb5 (26.Qd3 Qd4 27.Qd4 cd4=) 26...Qe4 27.Rf1 Re5 (27...Qd5 28.Nc7 Qe4 29.Ne8 Qe8 30.Qd6+– (30.Qa7?! d5+/–)) 28.Nd6 (28.Qa7!? Nf8 29.Nd6 Qd5 30.Qc7=) 28...Qd5+= 29.Nc4 Qe6 (29...Re7!?+=) 30.Qa7= Qc4 ½–½. Cirulis,Ilmars (1865) – Oortwijn,Ron (1990), FICGS, 2016.

4.c4 e5 5.Bb2 d6 6.Ne2+=.

4.ba5 Ra5 5.Bb2 b6 6.g3 (6.a4 d5+=) 6...Bb7 7.Bg2 Be7 (7...Bf3 8.Bf3 b5 9.e4+=) 8.0-0 (8.c4 0-0+=) 8...0-0 (8...h5 9.c4–/+) 9.c4 d5 10.cd5 ed5 (10...Rb5 11.Be5 Nfd7 12.Nd4 Rd5 13.Bg7 Kg7 14.Bd5 Bd5 15.Nc3=) 11.d3 Consolidates e4 (11.Bf6 Bf6 12.Ra2 Ba6+=) 11...Nbd7 (11...Bc8 12.Qc1+=) 12.Nbd2 Qa8 13.Nb3 White threatens to win material: Nb3xa5 (13.Qc2 Ne8+=) 13...Ra4 (13...Ra6 14.Bh3+=) 14.Qc1 (14.Nbd4 c5 (14...Ba3? fails to 15.Nb5+–) 15.Nc2 Ng4+=) 14...c5+= 15.Nbd2 (15.Nh4 d4+=) 15...Re8 16.e3 (16.Bh3 Nf8+=) 16...Rc8 Black prepares the advance c4 (16...c4 17.Bf6 Bf6 18.Nd4–/+) 17.Qc2 c4 18.dc4 (18.Rfb1 cd3 19.Qd3 Ba6=) 18...dc4+= Black has a new passed pawn: c4. Black has an active position. 19.Qc3 (19.Bh3 Rd8+= (worse is 19...Bf3 20.Bf6 Bf6 21.Bd7+=)) 19...Nc5 (better is 19...Rd8–/+) 20.Qe5?? another step towards the grave (better is 20.Qc2!?–/+) 20...Bf8 (better is 20...Ne6 secures the point 21.Qb5 Rc5–+) 21.Bd4?? terrible, but the game is lost in any case (better is 21.Qf5 Nce4 22.Bf6 Nf6 23.Ne1 Bg2 24.Ng2–+) 21...c3 (21...c3 22.Bc3 Ncd7–+) 0–1. Szemes,Tibor – Szarvas,Zoltan (2170), HUN–chT2 Asztalos (11), 2003. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5)

4.b5 Be7 5.e3 0-0 6.Bb2 d5 7.c4 Nbd7 8.d4 c6 (8...c5 9.cd5 ed5 10.Be2+=) 9.Nc3= dc4 (9...Ne4!?=) 10.Bc4+= Nb6 11.Bd3 cb5 12.Nb5 Bd7 13.0-0 a4 14.Ne5 Bb5 15.Bb5 Qd5 16.Bd3 Rac8 17.Rb1 Rfd8 18.f4 (18.Bc1 Qa5+/–) 18...Rc7 (18...g6 19.Qe2+=) 19.Qe1 (19.Qe2 Rdc8+/–) 19...Qd6 (19...Nfd7 20.Rc1 Rc1 21.Qc1=) 20.f5 Nbd7 21.fe6 fe6 22.Nd7 Qd7 23.Rf3 Rf8 24.Qe2 Qc6 25.e4 e5 26.de5 Nd7 27.Rbf1 Qe6 28.Rf8 Bf8 29.Kh1 Rc8 (29...Ne5?? 30.Be5 Rc8 31.Qb2+–) 30.Bb5 Nb6 31.Bd4 Bc5 (31...Be7 32.Rd1+–) 32.Bc5 Rc5 33.Rf8! Kf8 34.Qf2 Kg8 35.Qc5 h6 36.h3 h5 37.Qc7 Qh6 38.e6 (38.Qb7?! Qc1 39.Kh2 Qf4 40.Kg1 Qe3 41.Kh2 Qf4 42.g3 Qf2 43.Kh1 Qf3 44.Kg1 Qg3 45.Kf1 Qf3 46.Kg1 Qg3 47.Kf1 Qf3 48.Kg1 Qg3=) 38...Qe6 39.e5 h4 (39...Kh7 40.Qd6 Qd6 41.ed6+–) 40.Qb7 Kh7 41.Bd3 Kg8 42.Qb8 Kf7 43.Qc7 Kg8 44.Bb5 g6 45.Bc6 Nc4 46.Qd8 (46.Ba4?! Ne5 47.Qd8 Kg7 48.Qh4 Qd5+–) 46...Kg7 47.Bd5 Qe5 48.Qg8 (48.Bc4?! Qe1 49.Kh2 Qg3 50.Kh1 Qe1 51.Kh2 Qg3 52.Kh1 Qe1=) 48...Kf6 49.Qf8 (49.Qf8 Kg5 50.Bc4 Qa1 51.Bf1+–; 49.Bc4?! Qa1 50.Kh2 Qe5 51.Kg1 Qe3 52.Kf1 Qc1 53.Ke2 Qc2 54.Ke3 Qc1 55.Ke4 Qc2 56.Bd3 Qg2 57.Kd4 Qb2 58.Ke3 Qe5 59.Kd2 Qh2 60.Kc1 Qg1 61.Kb2 Qd4 62.Kc2 Qf2 63.Kc3 Qc5 64.Kd2 Qf2 65.Be2 Qf4 66.Kd1 Qd6 67.Kc2 Qa3 68.Qh8 Kg5 69.Qd8 Kh6 70.Qh4 Kg7 71.Qd4 Kh7+–) 1–0. Solis,Jose Alberto (2460) – Valverde,Mario (2055), CiF, 2007. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 Be7)

4.b5 g6 5.e3 Bg7 6.Bb2 0-0 7.Bf6 (7.Be2 d6=) 7...Qf6 8.Nc3 d5 9.d4 Nd7 10.Be2 c5 11.Qd2 b6 12.Rd1 cd4 13.Qd4 (13.Nd4!? Nc5 14.Bf3+=) 13...Qe7–/+ 14.Qd3 Qa3 (better is 14...Nc5 15.Qd2 Ne4 16.Ne4 de4–/+) 15.Nd4? (15.Nd5 Qc5 16.Nf4 Rd8+=) 15...Bb7 (15...e5 16.Nb3 a4 17.Nd2–+) 16.0-0? (better is 16.Nd5!? Qc5 17.Nf4–/+) 16...Ne5 (better is 16...Rfc8 17.Nb1 Qd3 18.Bd3 e5–+) 17.Ra1? (better is 17.Qd2–+) 17...Qa1! (17...Nd3?! 18.Ra3 Nc5 19.Na4 Na4 20.Ra4–+) 18.Ra1 Nd3 19.Bd3 (19.cd3 Bd4 20.ed4 Rfd8–+) 19...Rfc8 (19...e5 20.Nc6 e4 21.Ra3 ed3 22.cd3 Bc3 23.Rc3 Bc6 24.bc6–+) 20.Nce2 (20.Na4 e5 21.Nb6 ed4 22.Na8 Ra8 23.ed4 Bd4 24.Ra4–+) 20...e5 21.Nc6 Bc6 22.e4 (22.bc6 e4 23.Rc1 Rc6 24.Bb5–+) 22...Bb7 (22...de4 23.Bc4 Bb7 24.Ra4–+) 23.f3 f5 24.ef5 (24.Ng3 fe4 25.fe4 a4–+) 24...e4 25.fe4 Ba1 26.Kf2 (26.ed5 Bd5 27.Nf4 Bc4 28.fg6 hg6–+) 26...de4 (26...de4 27.Be4 Be4 28.fg6 hg6–+) 0–1. Rutledge,Timothy – Manninen,Jukka Pekka, corr 3GMM–20, 1996.

5.c4 Bb7 6.Nc3 d5 7.d4 (7.cd5 Nd5 8.Bb2 Nc3 9.Bc3 c6=) 7...Be7 (7...dc4 8.e3=) 8.Na4 (8.cd5 Nd5 9.Nd5 Qd5=) 8...Ne4 (8...dc4 9.e3+=) 9.Qc2 (9.e3 0-0=) 9...0-0 (9...dc4 10.e3+=) 10.c5= bc5 11.Nc5 Qc8 (11...Nc5 12.dc5 c6 13.a4=) 12.Rb1+= Nd7 13.Nb7 Qb7 14.e3 f5 (14...Rfc8 15.Bd3+=) 15.Bb2 (15.Bd3 Bd6+=) 15...f4 (15...Rac8 16.Qc6 Qc6 17.bc6=) 16.Bd3 (16.ef4 Rab8+=) 16...fe3 17.fe3 Ndf6 18.Ne5 Bd6 19.Nc6 (19.0-0 Rae8+=) 19...Qc8 (19...Ng5 20.Be2+=) 20.a4 Qe8 21.Qe2 (21.0-0 Qh5 22.h3 Qh6+=) 21...Qg6 (21...Bg3 22.hg3 Ng3 23.Qf3+=) 22.Rc1 (better is 22.0-0!?=) 22...Ng4+= 23.h3 (better is 23.Bc2+=) 23...Ngf2 24.Rg1?? (24.Be4 Ne4 25.g4–+) 24...Qg3 (24...Nd3 25.Kd1 Nb2 26.Qb2 Nf2 27.Qf2 Rf2 28.Nb4 Bb4 29.e4 Rd2 30.Ke1 Qe4 31.Kf1 Rf8) 25.Be4 Ne4 26.Kd1 Rf2 (26...Rf2 27.Qe1 Rb2–+) 0–1. Bowers,D – Ponomarev,Mikhail, Colorado op Denver, 1992.

5.c4 Bb7 6.Nc3 Bd6 7.d4=.

5.c4 Bb7 6.Nc3 Be7 7.d4 d5 8.e3 (8.cd5 Nd5 9.Nd5 Bd5=) 8...Kf8 (8...dc4 9.Bc4 c5 10.0-0=) 9.Bb2 (9.cd5 Nd5 10.Nd5 Qd5+/–) 9...Nbd7 (9...c6 10.Rc1+=) 10.Rc1 (10.cd5 Nd5 11.Nd5 Bd5+=) 10...c6 (10...c5 11.bc6 Bc6 12.cd5 Nd5 13.Bd3+/–) 11.bc6 Bc6 12.cd5 Nd5 13.Bd3 Rc8 (13...N5f6 14.0-0+/–) 14.Nb5 (better is 14.Nd5 Bd5 15.Rc8 Qc8 16.e4+/–) 14...g6? (better is 14...Bb5 15.Rc8 Qc8 16.Bb5 Kg8+/–) 15.Na7+– Bb7 16.Nc8 (16.Rc8?! Bc8 17.Nc6 Qe8+/–) 16...Bc8 17.e4 Nf4 18.Bf1 Kg7 (18...Bb7 19.Qd2 g5 20.d5+–) 19.g3 (19.Qd2 Nh5 20.d5 Nhf6+–) 19...Nh5 20.d5 f6 (20...Nhf6 21.d6 Bf8 22.Bb5+–) 21.d6 Bf8 22.e5 f5 (22...Kf7 23.ef6 Ndf6 24.g4 Bd6 25.Rc8 Bb4 26.ab4 Qd1 27.Kd1 Rc8 28.gh5 Nh5 29.Ng5 Ke7 30.Nh7+–) 23.Rc7 h6 (23...Kg8 24.Bd4 Bh6 25.Qc2+–) 24.Qc1 (24.Qc1 Be7 25.de7+–) 1–0. pcmvr – croach, net–chess.com, 2017.

5.c4 Bb7 6.d4 Be7=.

5.c4 Bb7 6.e3 d6 7.d4 Nbd7 8.Bb2 Ne4 9.Nbd2 Nd2 10.Qd2 f5 11.Be2 g6 12.Rd1 Bg7 13.0-0 0-0 14.Qc1 Qe7 15.a4 (15.Rfe1 Nf6+=) 15...g5 Black prepares f4 (15...Rac8 16.Qc2=) 16.Ba3 (16.Qc2 e5+=) 16...g4= 17.Ne1 Qh4 (17...c6 18.bc6 Bc6 19.Qc2+=) 18.f3 (18.c5!? bc5 19.dc5 Nc5 20.Bc5 dc5 21.Qc5+=) 18...g3= 19.h3 f4 20.e4 Qg5 (20...Rad8 21.e5=) 21.e5+= de5 22.c5 (22.Bf8 Rf8 23.c5 Bd5= (23...ed4? 24.c6+–)) 22...bc5 (better 22...c6!? 23.cb6 Rfc8=) 23.dc5+– (worse 23.Bc5 Rfd8–/+) 23...Bd5 24.Bc4 (better 24.c6!? Nb6 25.Bf8 Bf8 26.Bd3+=) 24...Nf6= Black intends e4 25.Nd3 (25.c6 Rf7=) 25...e4=+ 26.fe4 Ne4 27.Bd5 Bd4 28.Kh1 ed5 (worse 28...Qd5 29.Nf4 Qe5 30.Nd3=) 29.c6 (29.Nf4 Nf2 30.Rf2 gf2–+ (30...Bf2?! 31.Nd5 Qc1 32.Rc1=+)) 29...Be3 30.Qc2 Rf7 31.Qe2? (better 31.Bc1=+) 31...Nc3–+ 32.Qf3 Nd1 33.Rd1 Re8 34.Bb2 Re6 35.Bc3 Qf5 36.Ba5? (36.Ne1 Rh6 37.Qf1–+) 36…Rh6 (36...Rh6 37.Nf4 Bf4–+) 0–1. Uddin,Md Saif (1985) – Mohammad Minhaz Uddin (2275), Asian Zonal Chess Championships Zone, 2019. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 b6)

5.c4 d5 6.Qa4=.

5.e3 Bb7 6.d4 Be7 (6...d5 7.c4=) 7.Nbd2 0-0 (7...c6 8.bc6 Nc6 9.Bd3+=) 8.Bd3 c5 9.c3 (9.bc6 Nc6 10.0-0 Qc7+=) 9...d6 (9...d5 10.0-0=+) 10.0-0= Nbd7 11.Bb2 e5 (11...d5=) 12.Bf5 (12.e4!?=) 12...g6 (12...e4 13.Ng5 d5 14.c4–/+) 13.Bd7=+ Nd7 14.de5 (14.e4 Rc8=+) 14...de5 15.e4 Qc7 16.Qe2 Rfd8 (16...Nf6 17.c4 Bd6 18.Rad1–/+) 17.Nc4 (17.c4 f6=+) 17...Bf6 (17...Bf8 18.Rad1=+) 18.Rfd1= Nf8 19.Ne1 (19.Ne3 Ne6 (19...Be4? 20.Ng4 Bg7 21.Qe4+–) 20.g3 Be4=) 19...Ne6 20.g3 Ng5 (20...a4 21.f3=+) 21.f3 Bg7 (21...h5 22.Nc2=) 22.Rd8 (22.h4 Ne6=) 22...Rd8=+ 23.Rd1 f5 (23...Rd1 24.Qd1 Bc8 25.Nc2=) 24.Bc1 (24.Rd8 Qd8 25.ef5 e4+=) 24...Nf7 (24...Rd1 25.Qd1 Nf7 26.ef5 gf5 27.Ng2=) 25.Rd8= Qd8 (25...Nd8 26.ef5 gf5 27.Qc2=) 26.ef5 gf5 27.Qd3 Qd3 28.Nd3 e4 (28...Bf3 29.Kf2 e4 30.Nb6 ed3 31.Kf3 Ne5 32.Kf2 Ng4 33.Ke1 Nh2 34.Nd5 Nf3 35.Kd1+=) 29.fe4 fe4 30.Nf4 (30.Ndb2 Bc3 31.Na4 Ne5+=) 30...Bc3 31.Nb6 Ne5 32.Be3 (32.Kf1 Kf7=) 32...c4 (32...Bd4 33.Ng2=) 33.Na4 Nf3 (33...Ba1 34.Nc5 Ba8 35.Ne2=) 34.Kf2+= Be5 35.Nc5 Bc8 (35...Ba8!?+=) 36.Nd5+– Kf7 37.b6 (better 37.Nb6!? Be6 38.Ne6 Ke6 39.Nc4 Nh2 40.Ne5 Ke5 41.a4+–) 37...Nh2+= 38.Bf4?? (better 38.b7 Ng4 39.Ke2 Bb7 40.Nb7 Bg3 41.Bd2+=) 38...Bd4–+ 39.Kg2 Bc5 40.Kh2 Ba3 (better 40...Ke6!? 41.Nc3 Bb7 42.Kg2–+) 41.Be3 (41.Ne3 c3 42.Nc4–+) 41…Bb2 (41...Bb2 42.Bd2 Bb7–+) 0–1. Ferran Biosca,Robert (2175) – Collado Galarza,Josep (2280), Catalunya–chT, 1996. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 b6)

5.e3 Bb7 6.Be2 Be7 7.0-0 0-0 8.Bb2 c5 9.d4 (9.bc6 Nc6 10.c4 d5=) 9...d5 10.c4 Nbd7 11.Nc3 Rc8 12.Ne5 (12.cd5 Nd5 13.Nd5 Bd5=) 12...dc4 (12...cd4 13.ed4 Ne5 14.de5+=) 13.Nc4= Nd5 14.Nd5 Bd5 15.Rc1 cd4 16.Qd4 (16.Bd4 Bc5=) 16...Bf6+= 17.Qd2 Bb2 18.Qb2 Rc5 19.Nd2 Qg5 20.e4 Ba8 21.Qd4 Rc1 22.Rc1 Nc5 23.Qe3 Qe3 24.fe3 Ne4 (24...Be4? 25.Rc5 bc5 26.Ne4+–) 25.Ne4 (25.Nc4 Rc8 26.Re1 Rb8+=) 25...Be4+= 26.Bf3 Bd3 27.a4 g6 28.Rc6 Rb8 29.e4 e5 30.Kf2 Bb1 31.Ke3 h5 32.Be2 Ba2 33.Bc4 Bc4 34.Rc4 Rb7 35.Rc6 Kf8 36.Rc8 Ke7 37.Rc6 Kd7 (37...f6 38.Ke2+=) 38.Kd3= Ke7 39.Kc4 (39.Ke3 Rb8+=) 39...f6 40.Kc3 g5 41.Kc4 h4 (41...g4 42.g3=) 42.h3= Rb8 43.Rc7 Ke6 44.Rc6 Ke7 45.Rc7 ½–½. Izquierdo,Daniel – Muniz,Rafael, Uruguayan ch Semifinal, 2010. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5)

5.e3 d5 6.Bb2 c5 7.c4 Bd6 8.d4 cd4 9.ed4 0-0 10.Nbd2 Bb7 11.Be2 Nbd7 12.0-0 Rc8 13.Re1 Ne4 14.Ne4 de4 15.Nd2 Qg5 16.Bf1 Nf6 17.h3? (better is 17.g3!?+=) 17...Bf4–+ 18.Re2 e3 19.fe3 Be3 20.Kh1 Qg3 21.Re3 Qe3 22.Kh2 Qf4 23.Kg1 Rfd8 24.Qe2 (24.Nf3 Bf3 25.Qf3 Rd4 26.Qf4 Rf4–+) 24...Rd4 25.Bd4 0–1. saladars (1785) – amstersofia (2160), gameknot.com, 2015. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5)

5.g3 Bb7 6.Bg2 (6.c4 h5=) 6...d5 7.Bb2 (7.0-0 Nbd7=) 7...Bc5 (7...Bd6 8.d3=) 8.d4 Bd6 9.Nbd2 0-0 (9...Qe7 10.Ne5+=) 10.0-0= Qe8 (10...c6 11.bc6 Nc6 12.c4+=) 11.a4 (11.c4 dc4 12.a4 Nbd7+=) 11...Qe7 (11...Nbd7 12.Ne5+=) 12.Ne5 Be5 (12...Ne4!?+=) 13.de5+/– Nfd7 14.e4 Nc5 15.ed5 Bd5 16.Bd5 ed5 17.f4 (17.Nf3 Qe6+/–) 17...c6 18.Kh1 (18.Nf3 Qd7 19.Nd4 Re8+/–) 18...Rd8 (18...cb5 19.ab5 Qd7 20.Qe2+=) 19.f5 (19.Nf3+=) 19...Qg5 (19...cb5!? 20.ab5 Nbd7+=) 20.Rf4+/– cb5 21.ab5 h5 (better is 21...Ne4!? 22.Ne4 de4+–) 22.Nf3+– Qh6 (22...Qe7 23.f6 Qb7 24.Ng5+–) 23.c4 d4 (23...a4 24.cd5 Ra5 25.Rb4+–) 24.Rd4 (24.Nd4 a4+–) 24...Re8 (24...Rd4 25.Qd4 (worse is 25.Nd4 Qe3+/–) 25...Nbd7 26.Re1+–) 25.Rd6 (better is 25.Rd5 h4 26.Nh4+–) 25...Qh7 (25...Qe3 26.Bd4 Qb3+–) 26.Qc2 h4 (26...Qh8 27.Rb6 Nbd7 28.Rc6+–) 27.g4 h3 (27...Qh8 28.Qd1 Ne4 29.Rd8+–) 28.Rad1 Nbd7 (28...Ra7 29.Rb6 Qh8 30.Ba3+–) 29.Rd7 Nd7 30.Rd7 a4 31.Ba3 Qh6 (31...Rac8 32.Rf7! Kf7 33.Ng5 Kg8 34.Nh7 Re5 35.Kg1+–) 32.Bc1 Qh7 33.Bg5 (33.c5 Rac8 34.c6 Red8+–) 33...a3 (33...Reb8 34.Qa2 Rf8 35.c5+–) 34.Qa2 Kh8 (34...Ra4 35.c5! Kh8 36.Qf7+–) 35.Rf7 Qg8 (35...Rec8 36.Nh4 Rd8+–) 36.e6 Rf8 37.Rd7 (37.Ne5 Rfd8 38.Ng6 Kh7 39.Qb3 Rd1 40.Qd1 a2 41.Qa1 Ra3 42.Nf8 Qf8 43.Rf8 Rb3 44.Qa2 Rf3 45.Qa1 Rf2 46.Rf7 Rf1 47.Qf1 Kg8 48.Qh3 g6 49.Qh7) 37...Rfc8 (37...Rae8 38.e7 Rf6+–) 38.Ne5 Ra4 39.Ng6 (39.Ng6 Kh7 40.Qb3 Qe8 41.Qh3 Kg8 42.Qh8) 1–0. Uddin,Md Saif (2100) – Hossain,Belal (1945), 2rd SAIF POWERTEC National B Chess Cham, 2016. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5)

5.g3 d5 6.d3=.

5.Bb2 b6 6.Nc3 d5=.

5.Bb2 b6 6.e3 Bb7 7.c4 d6 (7...d5 8.d4=) 8.d4 Nbd7 9.Nbd2 (9.Be2 cd4 10.Bd4 Qc7=) 9...Rc8 10.Bd3 Be7 (10...cd4 11.ed4 (11.Bd4? e5–+) 11...d5 12.Rc1=) 11.0-0 0-0 (11...cd4 12.Nd4 Nc5 13.Be2=) 12.Qe2 (12.e4 cd4 13.Bd4 Nc5=) 12...Qc7 (12...cd4 13.Nd4 (13.Bd4? e5–+) 13...Nc5 14.e4=) 13.Rac1 (13.Rfc1 Rfd8=) 13...Rfe8 14.Ne1 (14.Rfe1 Red8+=) 14...Bf8 (14...cd4 15.ed4 Qd8 16.Nef3=) 15.f4 cd4 16.ed4 e5 17.fe5 (17.d5 e4 18.Bb1 a4=) 17...de5 18.d5 Qd6 (18...Bc5 19.Kh1=) 19.Bc2 (19.Rd1 e4 20.Ne4 Ne4 21.Be4 Nc5 22.Bh7 Kh7 23.Qh5 Qh6 24.Qh6 gh6 25.Rf7 Kg8+=) 19...g6 (19...e4 20.Kh1= (20.Be4? Ne4 21.Ne4 Qg6–+)) 20.Bb1 (20.Rd1 Bh6 21.Kh1 Bf4+=) 20...Bh6 (20...Bd5 21.cd5 Rc1 22.Bc1 Qc5 23.Qf2 Qc1–+) 21.Rc3 (21.Kh1 Nh5=) 21...Nh5 (21...Bd5!? 22.Rf2 Be6–/+) 22.g3 (22.Ne4 Qc7=) 22...Nc5 (22...f5!?+=) 23.Ne4= Qe7 24.Nc5 (24.d6 Qe6 25.Nc5 bc5=) 24...Qc5 25.Kg2 (25.Qf2!?=) 25...e4+= 26.Nc2 (26.Rc2 f5+=) 26...Bg7 (26...f5 27.Na1 f4 28.Be4–/+) 27.Ne3+= Qd6 (27...Bc3!? 28.Bc3 Qa3–/+) 28.Rcc1= Bb2 29.Qb2 f5 30.Qd4 (30.Rce1 Nf6=) 30...Rf8 (30...Rc5 31.Kh1 Bc8 32.Rce1=) 31.Kh1 (31.Rce1 Ng7=) 31...Ng7 32.Rcd1 Rc7 (32...Rc5 33.g4 f4 34.Ng2=) 33.Rd2 Rfc8 (33...Rd8 34.Qc3=) 34.Rdf2 (better is 34.Rff2=) 34...Rd7 (34...Re8 35.g4 Bc8 36.Re1=) 35.Be4 (35.g4 f4 36.Rf4+/–) 35...fe4? (better is 35...Qa3 36.Bf3 Qc5+=) 36.Ng4+– Nf5 37.Nf6 Kf7? (37...Kf8 38.Nd7 Ke7 39.Rf5 gf5 40.Qg7 Kd8 41.Nb6 Qe7 42.Qe7 Ke7 43.Nc8 Bc8+–) 38.Nd7 (38.Ne4 Qe7 39.Rf5 gf5 40.Rf5 Kg6 41.Rf6 Kg7 42.Rf4 Kh6 43.Qb6 Kg7 44.Rg4 Kh8 45.Qd4 Qg7 46.Rg7 Rg7+–) 38...Qd7 39.g4 (39.Qe4? Rc4 40.Qe5 Qd5 (40...Bd5?! 41.Kg1+=) 41.Qd5 Bd5 42.Kg1 Ke6–+; worse is 39.Qb6 e3 40.Rf5 gf5=) 39...e3 40.Qe3 (40.Rf5 gf5 41.Rf5 Qf5 42.gf5 e2+–) 40...Rc4 (better is 40...Kg8 41.gf5 Rc4+–) 41.Rf5 (worse is 41.gf5 Bd5 42.Rf3 gf5–/+) 41...gf5 42.Rf5 Qf5 43.gf5 Bd5 44.Kg1 Kf6 45.Qb6 (45.Qb6 Kf5 46.Qa5+–) 1–0. Santasiere,Anthony – Pinkus,Albert, New York, 1939. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 c5)

5.Bb2 b6 6.e3 Bb7 7.c4 Be7 8.Be2 0-0 9.d3 d6 (9...d5 10.0-0=) 10.Nbd2 Nbd7 11.0-0 Qc7 12.Qc2 Rad8 13.Rfe1 Rfe8 (13...d5 14.cd5 Nd5 15.Rad1=) 14.Rad1 Nf8 15.Nf1 Ng6 16.Ng3 Nd7 17.Nh5 Nde5 (17...e5 18.e4+=) 18.Nd2+= f6 19.d4 Nf7 20.Nf4 Nf4 21.ef4 cd4 22.Bd3 e5 23.Bh7 Kf8 24.Bg6 Rc8 (24...d5 25.fe5 fe5 26.Qf5+=) 25.Bf5 Rb8 (25...Rcd8 26.Be6+=) 26.Qd3+/– d5 27.fe5 fe5 28.cd5 Bd5 29.Rc1 Qb7 30.Ne4 (30.Be4 Rbd8+/–) 30...Nd6 (30...Rbd8 31.Rcd1+=) 31.Nd6 Bd6 32.Qh3 (32.Be4 Kg8+=) 32...Qf7 33.f4 Be6 (33...Rbd8!?+=) 34.fe5+/– Bf5 35.Qh8 Ke7 (better is 35...Qg8!? 36.Qg8 Kg8 37.ed6 Re1 38.Re1 Rd8+/–) 36.Qh4+– Kd7 37.Qd4 (37.Qd4 Qe6 38.Rc6+–) 1–0. Taulien,Hans_Juergen (2225) – Langschmidt,Dirk (1730), RSX10D – XMAS–1, 2003.

5.Bb2 b6 6.e3 Bb7 7.d4 Bd5=.

5.Bb2 b6 6.e3 d5 7.Be2=.

5.Bb2 d5 6.e3=.

5.c4 b6 6.Bb2 Bb7 7.e3 Be7 8.Be2 0-0 9.Nc3 (9.d3 Bf3 10.gf3 h6=) 9...Ne4 (9...d5!?= should be considered) 10.Ne4+= Be4 11.d3 Bg6 12.Ne5 Bf6 13.Bf3 Ra7 14.Ng6 Bb2 15.Nf8 Ba1 16.Qa1 Qf8 17.g4 d6 18.Be4 (18.h4 f5=) 18...Nd7 (18...Qd8 19.Bg2=) 19.f4 g6 Controls f5 (19...Qd8 20.g5=) 20.g5 White gets more space 20...Qg7 21.Qg7 Kg7 22.h4 Nf8 23.h5 Rd7 24.Bc6 White threatens to win material: Bc6xd7 24...Rd8 25.Bf3 d5 The typical lever 26.h6 Kg8 27.Ke2 dc4 28.dc4 f6 Attacks the pawn chain 29.Bc6 A classical outpost 29...Kf7 30.Rd1 Rd1 31.Kd1 e5 32.Ke2 (32.fe5!? is worthy of consideration 32...fe5 33.Bd5 Ne6 34.e4=) 32...ef4–/+ 33.ef4 fg5 34.fg5 Ke6 (34...Ne6!? 35.Bd5 Ke7–/+) 35.Be4 Ke5 36.Ke3 Ne6 37.Bg6 Ng5 (37...hg6 38.h7 Kf5 39.h8Q Ng5 40.Qf8 Ke6 41.Qc8 Kf6 42.Qd8 Kf5 43.Qb6+–) 38.Bc2 Nf7 Black threatens to win material: Nf7xh6 39.Bh7 Nh6 40.a4 (40.Bg6!?= is an interesting alternative) 40...Ng4–/+ 41.Kd3 Kf4 42.Bg8? (better is 42.Ke2–/+) 42...Ne5–+ 43.Kc3 Ke3 44.Be6 Nf3 45.Bf5 Nd4 46.Bg6 Ne2 47.Kc2 Kd4 48.Bf7 Nc3 49.Kb3 (49.Bd5 Na4 50.Kb3 Nc3–+) 49...Ne4 50.Bg8 Nd2 51.Kc2 Nc4 52.Kb3 Ne3 53.Bh7 c4 54.Kb2 c3 55.Kb3 c2! Mate threat 56.Kb2 (56.Bc2 Nc2 57.Kc2 Kc4 Combination) 56...Kc4 57.Kc1 Kb4 58.Bg8 Ka4 59.Bc4 (59.Kb2 a last effort to resist the inevitable 59...Kb4 60.Bh7–+) 59...Nc4 (59...Nc4 60.Kc2 Kb5 61.Kb3 Kc5 62.Ka2 b5 63.Kb1 b4 64.Kc2 a4 65.Kb1 b3 66.Ka1 a3 67.Kb1 Kd4 68.Ka1 Kd3 69.Kb1 Nd2 70.Ka1 b2 71.Ka2 b1Q 72.Ka3 Qb3) 0–1. Quast,Michael (1720) – Baumert,Christian (2060), Berlin op, 2002. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 c5)

5.bc6 bc6 6.g3 (6.d4 d5=) 6...d5+= 7.Bg2 Bd6 8.Bb2 (8.d4 0-0=) 8...0-0 (8...Nbd7 9.c4+=) 9.0-0 (9.Be5 Be5 10.Ne5 Nfd7 11.Nd7 Nd7+=) 9...Nbd7 10.d3 Qe7 (10...Rb8 11.Ra2+=) 11.c4= Ba6 12.Nbd2 e5 13.Qc2 (13.Qa4 Nc5 14.Qc2 Rab8=) 13...Rfb8+= 14.e3 a4 15.Rfb1 Nc5 Black intends e4 (15...Qe6 16.Rc1+=) 16.Bc3 (16.Be5!? Be5 17.Ne5 Qe5 18.d4 Rb1 19.Rb1+/–) 16...e4 (16...Nfd7!?+=) 17.Bf6 Rb1 (17...Qf6 18.de4 Nb3 19.Ra2+= (19.Nb3? ab3 20.Qd2 Bc4–+)) 18.Rb1 ed3 (18...Qf6!? 19.de4 dc4 20.Nc4 Bc4 21.Qc4 Qe6+/–) 19.Be7+/– dc2 20.Bd6 cb1Q 21.Nb1 Ne4 22.c5 Ra7? (22...Bd3!? 23.Nbd2 Nd6 24.cd6 Rd8+=) 23.Nfd2 (23.Nd4 Nd6 24.cd6 c5+–) 23...Rb7 (23...f5 24.Be4 fe4 25.Nc3+–) 24.Be4+– de4 25.Nc3 Rb2 26.Nde4 f5 (better is 26...Bd3!?+–) 27.Ng5 Rb3 (27...Bc4 28.h4+– (28.Na4?! Rb1 29.Kg2 h6+/–)) 28.Na4 Ra3 29.Nb6 Ra1 30.Kg2 h6 31.Ne6 g5 (31...Bd3 32.Ng7! Be4 33.Kh3+–) 32.h3 g4 (32...Bf1 33.Kh2+–) 33.hg4 fg4 34.Nf4 h5 (34...Bf1 35.Kh2 Ra7 36.Nc8+–) 35.Nd7 (35.Nh5?! Be2 36.Nf6 Kf7 37.Ng4 Bg4+–) 35...Bb5 (35...Bc4 36.e4+– (36.Nh5?? Bd5 37.e4 Be4 38.f3 gf3 39.Kf2 Ra2 40.Ke3 f2 41.Ke4 f1Q–+)) 36.e4 (36.Nh5 Bf1 37.Kh2 Be2+–) 36...Ba4 (36...Bf1 37.Kh2+–) 37.Be5 (better is 37.Nh5!? Bc2 38.Nhf6 Kf7 39.Ng4 Be4 40.f3 Bd5 41.Nge5 Ke6+–) 37...Rb1 (37...Rc1 38.Ne2 Rc4 39.Nd4+–) 38.f3 (38.Nf6 Kf7 39.Nh7 Rc1 40.Ng5 Ke7 41.Bd6 Kf6+–) 38...Kf7 (38...Bd1 39.fg4 hg4 40.Kf2+–) 39.fg4 (39.Bd4 Ke7 40.Ne5 Rb4+–) 39...hg4 40.Kf2 (40.Bd6 Bc2 41.Ne5 Ke8+–) 40...Rb3 (40...Bc2 41.Nf6+–) 41.Nf6 (41.Bd6 Rb2 42.Ke3 Rb3 43.Kd4 Rb4 44.Ke5 Rb3+–) 41...Rf3 42.Kg2 Bc2 43.Bd4 (43.Ng4 Be4 44.Kh3 Bf5+–) 43...Ra3 44.e5 (better is 44.Ng4 Be4 45.Kh3+–) 44...Ra2? (44...Bf5 45.Kf2+–) 45.e6 (better is 45.Ng4!? Bb3 46.Nf2 Ra4+–) 45...Ke7 46.Kg1 Bb3 (46...Ra3 47.N6h5 Ra7 48.Kf2+–) 47.Ng8 Ke8 48.Nh6 Rd2 (48...Ra5 49.Kf2 (49.Ng4?! Ra4 50.Bg7 Be6+–) 49...Ra2 50.Ke3+–) 49.Nf5 1–0. Bocharov,Dmitry (2555) – Smirnov,P (2595), Russian Rapid GP, 2015. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 c5)

5.d4 d5=.

5.e3 b6 6.Bb2 Bb7 7.c4 Be7 8.Bd3 d6 9.Nc3 Nbd7 10.Qc2 Qc7 11.Ne2 (11.Be2 0-0=) 11...0-0-0 12.h4 Ne5 13.Ne5 de5 14.f3 Qd7 15.Nc1 Qd6 16.e4 Nh5 17.Bc3 f5 (17...Rhf8 18.Qb2+=) 18.g4 (better is 18.ef5 Nf4 19.Bf1+=) 18...Ng3 19.Rh3 fe4 (19...fg4 20.fg4 Rhf8 21.Be2 Be4 22.Qb2 Ne2 23.Ke2 Bh4 24.Be5–+) 20.Be4–+ Be4 21.fe4 Rhf8 22.Rg3 Bh4 23.Ne2 Rf3 24.Qb2 Bg3 25.Ng3 Rg3 26.Be5 Qd3 27.Bg3 Qg3 28.Kd1 Qg4 (better is 28...Qf3 29.Kc1 Qh1 30.Kc2 Qe4 31.Kb3 Rd3 32.Ka2 Qc4 33.Kb1 Rb3–+) 29.Kc1 Qe4 30.Qg7 (30.Qc2 Rd4 31.Qe4 Re4 32.Kb2 Rc4 33.Rg1–+) 30...Qe1 (30...Qe1 31.Kb2 Qd2 32.Kb1 Qd3 33.Ka2 Qc4 34.Kb2 Rd2 35.Kb1 Qc2) 0–1. Stapleton,Ian – Steiner,Lajos, AUS–ch Adelaide, 1947. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 c5)

5.e3 b6 6.Bb2 Bb7 7.d4 Qc7 A) 8.dc5 Bc5 9.Nbd2 (9.Bd3 d6 10.0-0 Nbd7 11.Nc3 0-0 12.Qe2 e5 13.e4 a4 14.Rfd1=; 9.Bf6 gf6 10.Bd3 d6 11.Nbd2 Nd7 12.0-0 f5 13.e4 fe4 14.Ne4=) 9...d6 10.Bf6 gf6 11.Bd3 Nd7 12.0-0 f5 13.Re1 a4 14.e4=; B) 8.Nbd2 B1) 8...d5 9.c4 (9.dc5 Bc5 10.Bf6 gf6 11.Bd3 Rg8 12.0-0 Bd6 13.e4 d4 14.Kh1=) 9...Nbd7 10.Rc1 Rd8 11.cd5 Bd5 12.Bc4 Bd6 13.Qe2 0-0 14.e4+=; B2) 8...cd4 9.Bd4 (9.ed4 Bd6 10.Bd3 0-0 11.0-0 Rc8 12.Ne5 Be7 13.c4 d6 14.Ng4=) 9...d5 10.Bf6 gf6 11.c4 f5 12.a4 f4 13.cd5 fe3 14.fe3=; C) 8.c4 C1) 8...cd4 9.Bd4 Bc5 10.Bd3 Bd4 11.ed4 0-0 12.Nbd2 d6 13.0-0 Nbd7 14.Re1+=; C2) 8...d5 9.cd5 Bd5 10.dc5 Bc5 11.Nc3 Bb7 12.Na4 Bd6 13.Rc1 Qd8 14.Ne5+/–; C3) 8...Bd6 9.d5 (9.dc5 Bc5 10.Bd3 d6 11.Bf6 gf6 12.0-0 f5 13.Nc3 Nd7 14.e4+=; 9.Bd3 cd4 10.Nd4 Bh2 11.Nf3 Bd6 12.Nbd2 Be7 13.Qc2 d6 14.g4=) 9...Be7 10.Nc3 0-0 11.Bd3 ed5 12.Nd5 Nd5 13.cd5 Rc8 14.Be4+/–; C4) 8...Be7 9.dc5 (9.Bd3 cd4 10.Bd4 d6 11.Be2 e5 12.Bb2 Nbd7 13.Nc3 0-0 14.0-0=) 9...Bc5 10.Bd3 d6 11.Bf6 gf6 12.Nc3 f5 13.e4 fe4 14.Be4=.

5.e3 b6 6.Bb2 Bb7 7.d4 cd4 8.Bd4 d6 9.Nbd2 (9.Be2 e5 10.Bb2 Be7 11.0-0 0-0 12.c4 Nbd7 13.Nbd2 Qc7 14.Qc2=; 9.Bc4 Be7 10.0-0 0-0 11.Nbd2 Qc7 12.Qe2 Nbd7 13.Rfd1 e5 14.Bb2+=; 9.c4 Nbd7 10.Be2 Qc7 11.0-0 Rc8 12.Nbd2 Be7 13.Rc1 0-0 14.Ng5=) 9...Nbd7 (9...e5 10.Bb2 Be7 11.Be2 0-0 12.0-0 Nbd7 13.c4 Qc7 14.Qc2=) 10.Be2 Qc7 (10...Be7 11.0-0 0-0 12.c4 Qc7 13.Rc1 e5 14.Bb2=) 11.0-0 Be7 12.c4 0-0 13.Bb2 (13.Qc2 Rac8 14.Rfd1=) 13...Rfe8 (13...Rac8 14.Nd4=) 14.Nd4 (14.Qc2=) 14...e5 15.Nf5 Bf8 16.Rc1 Rac8 17.Re1 Nc5 18.Bf1 g6 19.Ng3 Nfd7 20.Qc2 f5 21.Ne2 Nf6 22.Nc3 h5 23.Red1 h4 24.h3 Qf7 25.Na4 Na4 26.Qa4 Nd7 27.c5 Nc5 (worse is 27...dc5 28.Bc4 Bd5 29.Bd5 Qd5 30.Nc4+/–) 28.Qh4 Bd5 29.Nf3 Ne4 30.Rc8 Rc8 31.Ng5 Be7 32.Nf7 Bh4 33.Nd6 Bf2 34.Kh2 Bg3 35.Kg1 Bf2 36.Kh2 Bg3 37.Kg1 Nd6 38.Rd5 Nc4 39.Bc1 e4 40.Rd1 Kf7 41.Be2 Ke6 42.Kf1 Bd6 43.Kf2 a4 44.g4 Be7 45.gf5 gf5 46.Rd4 Na5 47.Re4 Kf7 48.Bh5 Kf8 49.Ra4 Rc1 50.Rf4 Ba3 51.Rf5 Ke7 52.Be2 Bc5 53.h4 (better is 53.Rf4!?–/+) 53...Rc3 54.Rf3 Nc4 55.h5 (55.Bc4!? Rc4 56.Rh3–+) 55...Ne3–+ 56.Kg3 Nf5 57.Kg4 Rf3 58.Bf3 Nd4 59.Bd1 Nb5 60.Kf5 Kf7 61.Ba4 Nd6 62.Ke5 Kg7 63.Bd1 (63.Bc2 Nc4 64.Ke6 Kh6–+) 63...Kh6 64.Be2 Ne8 65.Kd5 Nf6 66.Kc6 Nh5 67.Ba6 Kg5 68.Kd5 Kf4 0–1. Jagodzinski,P – Sergeev,Vladimir, Guben GER, Open, 2012. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 c5)

5.e3 b6 6.Bb2 Bb7 7.d4 d5 A) 8.dc5 A1) 8...bc5 9.c4 (9.Nbd2 Bd6 10.Rb1 0-0 11.Be2 Nbd7 12.Nc4 Bc7 13.Nce5 Ne5 14.Ne5=; 9.Be2 Bd6 10.0-0 0-0 11.Nbd2 Nbd7 12.Rb1 Qb6 13.c4 Rfd8 14.cd5=; 9.a4 Bd6 10.Be2 0-0 11.0-0 Nbd7 12.Nbd2 Qb6 13.Rb1 Rfd8 14.c4=) 9...Be7 10.Nbd2 0-0 11.Bd3 Nbd7 12.0-0 Qb6 13.Rb1 Bd6 14.Qc2+=; A2) 8...Bc5 9.Bd3 (9.Nbd2 0-0 10.Bd3 Nbd7 11.0-0 Rc8 12.Nb3 Bd6 13.Qd2 Qc7 14.Rfd1+=) 9...0-0 10.0-0 Nbd7 11.Nbd2 Rc8 12.Nb3 Bd6 13.Qd2 Qc7 14.Rfd1+=; B) 8.c4 B1) 8...Nbd7 9.cd5 (9.Nbd2 Rc8 10.Bd3 dc4 11.Bc4 cd4 12.Bd4 Bd6 13.0-0 0-0 14.Bb3+=; 9.dc5 Bc5 10.cd5 Bd5 11.Nc3 Bb7 12.Be2 0-0 13.0-0 Qe7 14.Qa4=; 9.Bd3 cd4 10.Bd4 Bd6 11.Be2 0-0 12.cd5 Bd5 13.Nc3 Bb7 14.Nb1+=) 9...Bd5 10.Nc3 Bf3 11.Qf3 cd4 12.ed4 Rc8 13.Bd3 Bd6 14.0-0+=; B2) 8...Bd6 9.dc5 (9.cd5 ed5 10.dc5 bc5 11.Bd3 0-0 12.0-0 Nbd7 13.Nc3 Qb8 14.h3=) 9...bc5 10.Bd3 dc4 11.Bc4 0-0 12.0-0 a4 13.Nbd2 Nbd7 14.Bd3+=; B3) 8...cd4 9.Bd4 Nbd7 10.cd5 Bd5 11.Be2 Rc8 12.0-0 Bd6 13.Bb2 Qc7 14.Nbd2=.

5.e3 d5 6.Bb2 b6 7.Be2 Be7 8.0-0 0-0 9.Ne5 Nbd7 10.Nc6 Qe8 11.f4 Bd6 12.Be5+= Ne4 13.d3+/– Be5 14.fe5 Ng5 15.h4 Bb7 16.hg5 Bc6 17.bc6 Ne5 18.c7 Qd7 19.d4 cd4 20.ed4 Ng6 21.Bd3 Qc7 22.Qf3 Rac8 23.a4 Rfe8 24.Na3 Qc3?? 25.Nb5+– Qc6 26.Qf7 Kh8 27.Bg6 hg6 28.Rf4 (28...Qb5 29.Rh4#) 1–0. market (2235) – lbyer (2045), GameColony.com, 2003.

5.e3 d5 6.Bb2 Bd6 7.c4 Nbd7 8.d4 Qc7 9.Nbd2 b6 10.Bd3 Bb7 11.Rc1 0-0 12.0-0 Rac8 13.cd5 ed5 14.dc5 bc5 15.Bf5 Rfe8 16.Rc2 Ne5 17.Qa1 Nf3 18.Nf3 d4 19.Bd4 Bf3 20.Bf6 Bh2 21.Kh1 Be5 22.Qb1 Qb7 23.Rc4 Bg2 24.Kg1 Bf6 25.Bh7 Kh8 26.Rfc1 g6 27.Rf4 Bh3 28.f3 Bg5 29.Qb2 Kh7 30.Qh2 Bf4 0–1. Santasiere – Hesse, South Fallsburg 1948.

5.e3 d5 6.Bb2 Bd6 7.Be5=.

5.e3 d5 6.c4 b6 7.Bb2 Bb7 8.d4 Nbd7 9.Nbd2 Be7 10.Be2 0-0 11.0-0 Rc8 12.Ne5 (12.Rc1 Re8=) 12...cd4 13.ed4 Ne5 (13...dc4 14.Ndc4 Nd5 15.Re1+=) 14.de5= Nd7 15.Bf3 Nc5 16.Qe2 Bg5 17.Rad1 Na4 18.Ba1 Qe7 19.cd5 ed5 20.Nb1 Rfd8 21.Rfe1 Nc5 22.Bd4 Na4 (22...Rc7 23.Bg4=) 23.e6 f6 24.g3 Rd6 25.Bh5 Rc4 26.Bf7 Kh8 27.h4 (27.f4 Bh6+/–) 27...Bh6 28.Qh5 Rc2 (28...Nc5 29.Bf6 gf6 30.Qh6=) 29.g4 Rc4 30.g5 fg5 31.Qh6 Rd4 32.Qg5 Qg5 33.hg5 Rg4 (33...Rd1 34.Rd1 Bc8+–) 34.Kf1 d4 35.e7 Bg2 36.Ke2 Re4 37.Kd2 Re7 38.Re7 g6 39.Bb3 (39.Bb3 Rd8 40.Ba4+–) 1–0. Krupa – Hansen, Copenhagen, 1993. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 c5)

5.Nc3 cb5 6.Nb5 d5 7.Bb2 Be7 8.Be5 Nc6? (better is 8...Na6=) 9.Nc7+– Kf8 10.Na8 Ne5 (10...Bd7 11.Bf4+–) 11.Ne5 Bd7 12.Nd7 Nd7 13.e3 Qa8 14.Bb5 Nc5 (14...Nf6 15.d4+–) 15.d4 Ne4 16.0-0 (16.c4 Nd6+–) 16...Nc3 17.Qd3 Nb5 (better is 17...Qc8!?+–) 18.Qb5 Bd8 (18...Bd6 19.Rfc1 g6 20.c4 dc4 21.Rc4+–) 19.Rab1 b6 20.Rfc1 g6 21.c4 dc4 22.Rc4 Kg7 (22...Qe4 23.Rbc1+–) 23.Rc6 (23.a4 Qe4+–) 23...Qb7 24.Rd1 h5 (24...Qe7 25.Qe5 Qf6 26.Qf6 Kf6 27.d5+–) 25.d5 ed5 26.Qd5 Bf6 27.Qf3 Bg5 (27...Qe7+–) 28.Rg6!! (28...Kg6 29.Qb7+–) 1–0. kamret (2165) – antek (1765), GameColony.com, 2003.

5.Nc3 Qb6 6.Rb1 Bc5 (6...c5 7.e4+=) 7.d4+/– Bd6 (7...Be7 8.e4+=) 8.e4 Ng4 (8...Be7 9.e5 Ng8 10.Bd3+/–) 9.e5+– Be7 10.h3 Nh6 11.Bh6 gh6 12.bc6 Qc6 13.Rb3 Rg8 14.d5 ed5 15.Nd5 (< 15.Qd5 a4 16.Qc6 dc6–/+ (< 16...bc6 17.Na4 Kd8 18.Nb6 Ra3 19.Nc8 Rb3 20.cb3 Kc8 21.g3+/–)) 15...Na6? (15...Kf8+–) 16.Bb5 (16.Ne7?! Ke7 17.Nd4 Qc5+–) 16...Qg6 17.Rc3 (17.Nb6 Bb4 18.Rb4 Nb4 19.Na8 Nc2 20.Kd2 Na3+–) 17...Qg2 (17...Qe4 18.Re3 Qg6 19.Nf6 Kf8 20.Ng8 Kg8+–) 18.Rh2 Qg6 19.Rc8! Rc8 20.Ne7 Ke7 21.Qd7 Kf8 22.Qc8 Kg7 23.Qb7 Nc5 24.Qe7 Qe4 (24...Rc8 25.Rh1 Qe4 26.Be2 Nd3 27.Kf1+–) 25.Be2 Qd5 (25...Ne6 26.Rg2 Kh8 27.Qf6 Ng7 28.Qf7 h5+–) 26.Rg2 (26...Kh8 27.Qf6 Rg7 28.Qg7) 1–0. kamret (2155) – rhein33 (1830), GameColony.com, 2003.

5.Nc3 d5 6.e3=.

5.c4 d5 6.e3 Nbd7 7.Bb2 Be7 8.Bf6 Bf6 9.d4 0-0 10.Nbd2 e5 11.de5 Ne5 12.Ne5 Be5 13.Ra2 d4 14.Nf3 Bg4 15.Be2 Bf3 16.Bf3 de3 17.Qd8 ef2 18.Kf2 Rad8 19.bc6 bc6 20.Bc6 Rd4 21.Bd5 Rf4 22.Ke3 Re8 23.Kd3 Rd4 24.Kc2 Rf4 25.g3?? Rf2–+ 26.Kb1 Rb8 (26...Rb8 27.Kc1 Ra2–+) 0–1. ludice (1790) – syllwestr (1805), kurnik, 2011.

5.e3 cb5 6.Bb5 b6 (6...Nc6 7.0-0=) 7.0-0 Be7 8.c4 0-0 9.d4 Bb7 10.Nbd2 d6 (10...Qc7 11.Bb2+=) 11.Bb2+= Qc7 12.Rc1 Nbd7 13.Qe2 Rac8 14.Rfd1 Rfd8 15.h3 e5 16.Nf1 e4 17.N3d2 d5 18.cd5 Qd6 19.Ng3 (19.Bc6 Bc6 20.dc6 Rc6+/–) 19...Qd5+= 20.Bc4 Qg5 21.Ba6 Rc1 22.Rc1 Bd5 23.Qf1 (23.Qb5 h6+=) 23...Bd6 24.Ne2 Be6 (24...Nb8 25.Nc4 Bc4 26.Bc4+/–) 25.Nc3+/– Bf5 26.Nc4 Bb8 27.g3 (better is 27.Kh1!?+/–) 27...Qh5= 28.h4 (28.Kh2 Ng4 29.Kg1 Ngf6=) 28...g5+= 29.Ne2 (29.Qd1 Ng4 30.f4 gh4 31.Qe1–+) 29...gh4–+ 30.Ne5 (30.gh4!? Qh4 31.Ng3 Bh3–+) 30...Ne5 31.de5 Ng4 32.gh4 Qh4 33.Qg2 h5 (33...Bg6 34.e6 fe6 35.Bc4 Bh2 36.Kf1–/+) 34.Ng3 (34.Bd4 Kh7 35.Ng3 Bg6 36.Bb6 Rg8–/+) 34...Qg5 (34...Bg6 35.Be2–/+) 35.Nf5 (35.Be2!? Kf8 36.Ne4 Be4 37.Qe4 Be5 38.Be5 Ne5 39.Kf1+=) 35...Qf5–/+ 36.Bb7 (36.Be2 Rd2 37.Bg4 hg4–/+ (worse is 37...Qg4 38.Qg4 hg4 39.Rc8 Kh7 40.Bd4+–)) 36...Be5 (36...Rd2!? 37.Ba1 Rf2 (37...Be5 38.Bc8 Qf2 39.Qf2 Nf2 40.Be5–/+; 37...Qf2 38.Qf2 Nf2 39.Rc8 Kh7 40.Bd4+/–) 38.Qe4 Qg5–+ (38...Be5?! 39.Qf5 Rf5 40.Bd4–+)) 37.Be4–/+ Bh2 (37...Qe6 38.Be5 Qe5–/+) 38.Kh1?? (better is 38.Qh2 Qe4 39.Qh5=) 38...Qe4!–+ 39.Qe4 Nf2 40.Kh2 Ne4 41.Bd4 b5 42.Kg2 a4 43.Kf3 Nd2 44.Kf4 Nb3 45.Rg1 Kf8 (45...Kh7 46.Bc3 Rc8 47.Be5–/+) 46.Bf6 (46.Bc3 Ke8 47.Rg5 Rc8 48.Re5 Kd7 49.Rd5 Kc6 50.Rh5 Kb6+=) 46...Rd2–/+ 47.Kf3 (47.Bc3 Rf2 48.Kg5 Nd2 49.Bb4 Kg7 50.Bc3 f6 51.Kh5 Kf7 52.Bd2 Rd2–+) 47...Rd6 (47...Rd5!? 48.Kf4 Nc5–/+) 48.Bc3 Rg6 49.Rh1 Rh6 50.Rh4 Ke8 51.Kf4 f6 (51...Nc5!?–/+) 52.Kf5+= Kf7 53.Bb4 Rh8 54.Bc3 Rh6 55.Bb4 Nc1 (55...Kg7 56.Re4+=) 56.Re4= Rh7 57.Re7 Kg8 58.Re8 Kg7 59.e4 Nd3 60.Re7 Kg8 61.Re8 ½–½. Popper,Tomas (1960) – Blahynka,Martin (2235), Brno CZE, 5th Open, 2014. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 c6)

5.e3 d5 6.a4 h6=.

5.e3 d5 6.Bb2 cb5 7.Bb5 Bd7 8.c4 dc4 9.Bc4 b5 10.Be2 b4 11.0-0 Nc6 12.d3 Be7 13.ab4 ab4 14.Nbd2 0-0 15.Qc2 Qb6 16.Nc4 Qb7 17.Nfd2 Ra1 18.Ra1 Ra8 19.Ra8 Qa8 20.Bf3 Qa7 21.h3 Nd5 22.Ne4 Qb8 23.Ncd2 Qb6 24.Nb3 Na5 25.Nec5 Be8 26.Bd4 Nb3 27.Nb3 Qb8 28.Qb2 Nf6 29.Nd2 Qb5 30.Nc4 Kf8 31.Be5 Bc6 32.Be2 Qd5 33.e4 Qd8 34.Bd4 Qb8 35.Ne5 Be8 36.Ng4 Qd8 37.Ne3 Bb5 38.Bf1 Qa5 39.Nc4 Bc4 40.dc4 Ne4 41.Bg7 Ke8 42.Bd3 f5 43.Bh6 Bf6 44.Qe2 Qa1 45.Kh2 Qe5 46.g3 Qd4 (better is 46...b3!? 47.Be3 Kf8=) 47.Be3+/– Qc3 48.c5 (better is 48.f3 Nd6 49.c5+–) 48...Kd7?? (better is 48...Bd4 49.Be4 fe4 50.Qb5 Kf8 51.Bh6 Bg7 52.Qb8 Kf7 53.Qb7 Kg6 54.Bg7 Qc5+/–) 49.Bb5+– Kc7 50.Qh5 (better is 50.Qa2 Nc5 51.Qa7 Kc8 52.Bc5 Qg3 53.fg3 f4 54.Qa6 Kc7 55.Bd6 Kd8 56.Qa8) 50...Qe1?? (50...Nc5 51.Qe8 Be5 52.Qc6 Kb8 53.Qb6 Kc8 54.Bc5 Bg3 55.Kg2 Qg7 56.Qe6 Kb8 57.fg3 Qb2 58.Be2 Qe2 59.Qe2 Kc7 60.Bb4 Kb6 61.Qf2 Kb7 62.Qf5 Kc7 63.Qh7 Kb6 64.g4 Kb5 65.Qb7 Kc4 66.Qe4 Kb5 67.g5 Kb6 68.Qd4 Kb7 69.Qd7 Ka6 70.Bc5 Ka5 71.Qb7 Ka4 72.Qb4) 51.Qf7 Kc8 1–0. Vorobjov,Pavel (2255) – Kass,Viktor (1910), Polva op, 2008. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 c6)

5.e3 d5 6.Bb2 Be7 7.Nc3 Nbd7 8.d4 0-0 9.Bd3 Qc7 10.0-0 b6 11.bc6 Qc6 12.Bb5 Qc7 13.Rc1 Bb7 14.Ne2 Ne4 15.c4 Qd6 16.Bd7 Qd7 17.Ne5 Qd8 18.cd5 ed5 19.Nf4 b5 20.f3 Nf6 21.Qb3 a4 22.Qa2 Qb6 23.Rc2 Rfc8 24.Rfc1 b4 25.Rc8 Rc8 26.Rc8 Bc8 27.Nd5 Nd5 28.Qd5 Qe6 29.Qe6 Be6 30.Nc6 Bg5 31.e4 Be3 32.Kh1 ba3 33.Ba3 Bd7 34.Ne7 Kh8 35.d5 Bd4 36.f4 f6 37.h4 g6 38.Nc6 Bc3 39.e5 fe5 40.fe5 1–0. Coltharp – Bouma, email 4AMM–07 1997.

5.e3 d5 6.c4 Nbd7 (6...dc4 7.Bc4 Bd7 8.Nc3=) 7.Nc3 Nb6 8.d3 Prevents intrusion on e4 (8.bc6 dc4 9.Na4 Rb8=) 8...Be7 (8...cb5 9.Nb5 Bd7 10.Bd2+=) 9.Be2 (9.cd5 cd5 10.h4 Ng4+=) 9...0-0 (9...Bd7 10.cd5 ed5 11.bc6 bc6 12.e4=) 10.0-0 (10.cd5 ed5 11.bc6 bc6=) 10...Qc7 11.Bb2 Rd8 (11...Bd7 12.Rc1=) 12.Qb3 (12.cd5 ed5 13.Na4 Na4 (worse is 13...cb5 14.Be5 Bd6 15.Bf6 gf6 16.Rc1+/–) 14.Qa4 c5=) 12...c5 (12...Ne8 13.h3=) 13.Na4 Na4 14.Qa4 (14.Be5 Qb6 15.Qa4 Ne8=) 14...Nd7 15.Rac1 Bf6 (15...b6 16.cd5 ed5 17.Qb3=) 16.d4 (16.Bf6 Nf6 17.d4 cd4 18.Nd4 dc4 19.Bc4 Qe7=) 16...Nb6 The black knight is safe in front of b5 (16...dc4 17.Bc4 b6 18.Qb3=) 17.Qc2 dc4 18.dc5 Qc5 19.Bf6 gf6 20.Qb2 (20.Nd2!?= must be considered) 20...e5–/+ 21.Nd2 Bd7 Black threatens to win material: Bd7xb5 (21...Be6!?–/+) 22.Nc4 (22.Ne4!? Qe7 23.Bc4+=) 22...Qb5 23.Qb5 Bb5 24.Nb6 Be2 25.Rfe1 White threatens to win material: Re1xe2 25...Ra6 Black threatens to win material: Ra6xb6 26.Na4 (26.Rb1 Rd2+=) 26...Rc6 (26...b5!?+=) 27.Rc6= bc6 Black has a new passed pawn: c6. 28.Nc3 Ba6 29.Ne4 White threatens to win material: Ne4xf6 29...f5 Black threatens to win material: f5xe4 30.Nc5 Bc4 31.Rc1 White threatens to win material: Rc1xc4 31...Rd5 32.Na4 Bb5 Black threatens to win material: Bb5xa4 33.Nc3 White threatens to win material: Nc3xd5 (33.Nb6 Rd2 34.a4 Bd3=) 33...Rc5 34.f3 Rc4 Black prepares the advance f4 35.Kf2 Kg7 36.Ke1 f4 Black wins space 37.e4 Kg6 38.Ne2 Rc1 39.Nc1 A minor pieces endgame occured 39...Bc4 40.Kf2 (40.Kd2 Kf6+=) 40...f5–/+ 41.g3 fe4 42.fe4 Kg5 43.Kf3 a4 44.h4 (better is 44.h3!? fg3 45.Kg3+=) 44...Kh5–+ 45.gf4 ef4 46.Kf4 Kh4 47.Kf5 (47.Ke5!?–/+) 47...Kg3–+ 48.e5 h5 49.e6 c5 (49...Be6 50.Ke6 Kf3–+) 50.e7= Bb5 51.Ne2 Kf2 Black threatens to win material: Kf2xe2 (51...Kf3 52.Nc3 Bc6 53.Kg5=) 52.Nc3+= White threatens to win material: Nc3xb5 52...Bd7 53.Kg5 c4 54.Kh5 (54.Nd5!?=) 54...Ke3+= 55.Kg6 Kd2 56.Ne4 Ke3 Black threatens to win material: Ke3xe4 57.Nf6 White threatens to win material: Nf6xd7 57...Bb5 58.Kf7 (58.Nd5!? Kd2 59.Nc7–+) 58...c3–+ 59.Nd5?? White crumbles in face of a dire situation (59.Ke6 c2 60.Nd7–+) 59...Kd2 (59...Kd2 60.Nb4 c2–+) 0–1. Derezuk,Alexandra – Kosov,Ivan, Russia CC op, 2002. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 c6)

5.a4 Nbd7 6.Bb2 Bd6 7.e3 0-0 8.Be2 Re8 9.0-0 e5 10.c4 e4 11.Nd4 dc4 12.Bc4 Ne5 13.Be2 c5 14.bc6 bc6 15.f4 ef3 16.Nf3 Nf3 17.Bf3 Rb8 18.Qc2 (18.Bf6!? Qf6 19.Nc3+=) 18...Ba6–/+ 19.Rf2? (better is 19.Rc1!?–/+) 19...Bd3!–+ 20.Bf6?? (20.Qd3 Rb2 Deflection) 20...Bh2! (20...Bc2?! 21.Bd8 Red8 22.Nc3+=; 20...Qf6?! 21.Qd3 Qa1 22.Rf1–+) 21.Kh1 (21.Kh2 Qd6 Decoy (21...Bc2 Zwischenzug)) 21...Qf6 (21...Bc2?! 22.Bd8 Bg3 23.Bc7 Bc7 24.Nc3–+; worse is 21...gf6 22.Qa2 Bg3 23.Bh5 Bf2 24.Qf7 Kh8 25.Qe8 Qe8 26.Be8 Re8 27.Nc3–+) 22.Qd3 Bg3 23.Qh7 (23.Bg4 Qf2 24.Nc3–+) 23...Kh7 24.Be4 Re4 25.Rf6 Ra4 26.Rf3 Ra1 27.Rg3 Rbb1 28.Kh2 0–1. jeich (1870) – kostini (1875), gameknot.com, 2014.

5.Bb2 A) 5...Nbd7 A1) 6.d3 Nb6 (6...Bd6 7.e4 e5 8.ed5 Nd5 9.Nbd2 0-0; 6...Bc5 7.e3 0-0 8.Be2 c6 9.c4 cb5; 6...c6 7.c4 cb5 8.cb5 Bd6 9.e3 0-0; 6...Be7 7.e4 0-0 8.e5 Ng4 9.Be2 c5) 7.e3 Bd6 8.Be2 0-0 9.0-0 Bd7; A2) 6.c4 Bd6 (6...dc4 7.e3 Nb6 8.Bd4 Bd7 9.Bb6 cb6; 6...Be7 7.cd5 ed5 8.e3 0-0 9.Qc2 Re8; 6...Nb6 7.cd5 ed5 8.e3 Bd6 9.Be2 0-0) 7.d4 dc4 8.Nbd2 c3 9.Bc3 Nd5; A3) 6.e3 Bd6 (6...c5 7.c4 Bd6 8.d4 0-0 9.Nc3 Nb6; 6...Be7 7.Be2 Bd6 8.0-0 e5 9.d4 e4) 7.d4 Nb6 8.Bd3 Bd7 9.Ne5 Na4; B) 5...Bc5 6.e3 0-0 (6...Bd6 7.Be5 Be5 8.Ne5 Nbd7 9.d4 0-0; 6...Nbd7 7.d4 Be7 8.Bd3 c6 9.0-0 0-0) 7.d4 Be7 8.Bd3 c6 9.Nc3 Bd7; C) 5...Be7 6.e3 0-0 (6...Nbd7 7.Be2 0-0 8.0-0 Bd6 9.d4 Nb6; 6...Bd6 7.Be2 0-0 8.0-0 Nbd7 9.d4 Nb6) 7.Be2 c6 8.0-0 cb5 9.Bb5 Bd7; D) 5...Bd6 D1) 6.c4 0-0 (6...Nbd7 7.d4 dc4 8.Nbd2 c3 9.Bc3 Nd5; 6...c6 7.e3 0-0 8.d4 dc4 9.Nc3 Nd5; 6...dc4 7.e3 c3 8.Nc3 Nbd7 9.d4 Qe7) 7.e3 Bd7 8.Qc2 dc4 9.Bc4 c6; D2) 6.Nc3 0-0 (6...e5 7.e3 0-0 8.Be2 a4 9.0-0 Bf5; 6...a4 7.e3 0-0 8.d4 Nbd7 9.Bd3 Re8; 6...Nbd7 7.e3 e5 8.Be2 0-0 9.0-0 Nb6; 6...Bd7 7.e3 0-0 8.Be2 e5 9.0-0 Bf5) 7.e3 e5 8.Be2 Nbd7 9.0-0 Nb6; D3) 6.e3 Nbd7 (6...0-0 7.Be2 Qe7 8.d4 c6 9.Nc3 Bd7) 7.d4 0-0 8.Bd3 c6 9.0-0 cb5.

5.c4 c5 6.Bb2 Nbd7 A) 7.e3 Nb6 (7...Bd6 8.d4 0-0 9.Nc3 Nb6 10.dc5 Bc5+=; 7...Be7 8.d4 0-0 9.cd5 Nd5 10.Bd3 b6=) 8.d3 dc4 9.dc4 Qd1 10.Kd1 Be7=; B) 7.cd5 ed5 8.e3 Bd6 9.Be2 0-0 10.0-0 Qb6=.

5.c4 c5 6.d4 cd4 (6...Bd6 7.cd5 ed5 8.dc5 Bc5 9.e3 Bg4 10.Be2 0-0=) 7.Qd4 Nbd7 8.cd5 Bc5 9.Qd3 Nd5 10.e3 Be7=.

5.c4 c5 6.cd5 ed5 7.e3 Bf5 (7...Bd6 8.Be2 0-0 9.0-0 Bf5 10.Bb2 Nbd7=) 8.Be2 Bd6 9.Nc3 0-0 10.0-0 Re8+=.

5.c4 c5 6.e3 A) 6...Be7 A1) 7.d4 cd4 (7...0-0 8.cd5 Qd5 9.Bb2 cd4 10.Bd4 Nbd7=; 7...Nbd7 8.cd5 ed5 9.dc5 Nc5 10.Be2 Be6=) 8.Qd4 Ne4 9.Ra2 Bf6 10.Qd1 b6=; A2) 7.Bb2 Nbd7 (7...0-0 8.Be2 dc4 9.Bc4 Nbd7 10.0-0 b6=) 8.d4 0-0 9.cd5 Nd5 10.Bd3 b6=; A3) 7.Be2 dc4 (7...Nbd7 8.d3 0-0 9.0-0 Qb6 10.Bb2 Bd6=) 8.Bc4 Nbd7 9.0-0 0-0 10.Bb2 Nb6=; B) 6...Bd6= 7.Bb2 (7.Nc3 Nbd7 8.Bb2 dc4 9.Bc4 Nb6 10.Be2 e5=; 7.d4 Nbd7 8.cd5 ed5 9.dc5 Nc5 10.Be2 0-0=) 7...b6 (7...Nbd7 8.d4 0-0 9.Nc3 Nb6 10.cd5 ed5+=; 7...0-0 8.d4 Nbd7 9.Nc3 Nb6 10.dc5 Bc5+=) 8.d4 0-0 9.dc5 bc5 10.Nc3 Bb7=; C) 6...Nbd7 7.d4 cd4 (7...Bd6 8.cd5 ed5 9.dc5 Nc5 10.Be2 0-0=) 8.ed4 dc4 9.Bc4 Bd6 10.0-0 0-0=.

5.c4 c5 6.g3 Bd6 (6...dc4 A) 7.Bg2 Nbd7 (7...Bd6 8.Qc2 Nbd7 9.Qc4 0-0 10.Bb2 Nb6=) 8.Qc2 Nb6 9.Ne5 Bd6 10.Nc4 Nc4=; B) 7.Qc2 e5 (7...Bd6 8.Bb2 Nbd7 9.Qc4 0-0 10.Bg2 Nb6=; 7...Qd5 8.Nc3 Qh5 9.Na4 Nbd7 10.Qc4 Bd6=) 8.Ne5 Qd5 9.Nf3 Bf5 10.Qa4 Nbd7=) 7.Bg2 (7.d3 dc4 8.dc4 0-0 9.Nc3 Qe7 10.Bg2 Nbd7=) 7...0-0 (7...dc4 8.Qc2 Nbd7 9.Qc4 Nb6 10.Qc2 Bd7=) 8.0-0 (8.Bb2 d4 9.0-0 e5 10.d3 Re8=) 8...Re8 (8...dc4 9.Qa4 (9.Qc2= e5 10.Bb2 Qe7=) 9...e5 10.Nc3 Nbd7=) 9.Qc2 (9.d3 dc4 10.dc4 e5=) 9...Nbd7 (9...Qb6 10.d3 d4=) 10.Bb2 (10.d3 d4=) 10...b6= (10...d4=). Nikolayevsky,Yuri V – Flesch,Janos, Varna, 1968. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5)

5.d4 c5 6.dc5 Bc5 (6...Ne4 7.e3 Bc5 8.Bb2 0-0 9.Bd3 f6) 7.Bb2 0-0 8.e3 Nbd7 9.c4 b6.

5.d4 c5 6.e3 Nbd7 7.a4 Nb6 8.Be2 Bd6 9.0-0 Qc7 10.c3 Bd7 11.Ba3 Ne4 12.h3 0-0 13.Nfd2 f5 14.Ne4 fe4 15.Nd2 Rf6 16.dc5 Bc5 17.Bc5 Qc5 18.c4 Qb4 (18...dc4? 19.Ne4 Qc7 20.Nf6 gf6 21.Qc2+–) 19.Rb1 Qa4 20.c5 Qd1 21.Rbd1 Na4 22.Ne4 Rf7?? (better is 22...de4 23.Rd7 Nc5+=) 23.Ra1+/– de4 24.Ra4 Rf5 25.Rc1 Rc8 26.Ra5 (26.Re4?! Rcc5 27.Rec4 Rc4 (worse is 27...Rb5 28.Rc7 Bc6 29.Bb5 Rb5 30.f3+=) 28.Bc4 Kf8=) 26...Rfc5 27.Rc5 Rc5 28.Ra8 Kf7 29.Rb8 Rc1 30.Kh2 Rc2 31.Rb7 Re2 (better is 31...Ke7!? 32.Bd1 Rf2+=) 32.Rd7+– Kf6 1–0. Huber,Gregory (2210) – Walker,Warrick, Alberta, 1999. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5)

5.d4 c5 6.Bf4 cd4 (6...a4 7.Nc3 Ne4 8.Ne4 de4 9.Ng5 cd4) 7.Qd4 Nbd7 8.e3 Bc5 9.Qc3 Nh5.

5.d4 c5 6.Bg5 Nbd7 (6...cd4 7.Qd4 Nbd7 8.e3 Bc5 9.Qh4 h6; 6...h6 7.Bf4 a4 8.c4 dc4 9.Bb8 Rb8) 7.e3 c4 8.Nc3 a4 9.Be2 Be7.

5.d4 Bd6 6.c4 0-0 7.c5 Be7 8.Bf4 (8.Nc3 Bd7=) 8...c6 (8...b6 9.c6=) 9.b6+= Na6 (9...Ne4 10.e3+=) 10.Qa4 (10.Nc3 Nh5 11.Bd2 Nf6+=) 10...Ne4 11.Nbd2 (< 11.Qa5 Bd7 12.Qa4 Nac5=+) 11...Nac5 (11...f6 12.e3= (< 12.Qa5 e5–/+)) 12.dc5 Nc5 13.Qc2 Qb6 14.Ng5 f5 15.Rb1 (15.Ngf3 Qd8+=) 15...Qd8 16.Ngf3 Ne4 17.a4 Bb4 18.Be5 (18.Rb3 c5 19.e3 c4–/+) 18...c5 19.e3 (19.Rc1 c4=) 19...Bd7 20.Be2 Qe8 21.Bd1 (21.Ra1 c4=+) 21...Qe7 (21...f4 22.ef4 Qg6 23.Rb4 Qg2 24.Nf1 Qh1 25.Rb7=+) 22.Rb2 (22.Rc1 Rac8=+) 22...c4 23.Ra2 Bd2 (23...Rac8!?=) 24.Nd2+= c3? (better is 24...b5 25.ab5 Bb5 26.Ne4 fe4=) 25.Ne4+– de4 (25...fe4 26.Qc3 Qg5 27.Bg3+–) 26.Qc3 (26...Rfc8 27.Qb3+–) 1–0. kamret (2135) – chessbeginer (1710), GameColony.com, 2003.

5.d4 Bd6 6.c4 b6 7.Nc3 Bb7 8.cd5 ed5 9.Bg5 0-0.

5.d4 Bd6 6.c4 dc4 7.Qc2 0-0 (7...Nbd7!?= 8.e4 e5 9.Bb2 ed4) 8.e4+= b6? (better is 8...Be7+= 9.Bc4 c6) 9.e5+– (9.Bc4?! Be7+/–) 9...Bb7 10.ef6 Bf3? (better is 10...Qf6 11.Bg5 Qf5 12.Qf5 ef5 13.Bc4 Re8 14.Kd1 h6+–) 11.fg7 (11.gf3?! Qf6 12.Qe4 c6+–) 11...Kg7 12.gf3 Kh8 (12...c6 13.Qc4 cb5 14.Qb5+–) 13.Bc4 Qh4 (13...Nd7 14.Bb2+–) 14.Qe4 Qe4 (14...Be7 15.Bb2 Nd7 16.d5 e5 17.Nd2+– (17.Be5?! Ne5 18.Qh4 Bh4+=)) 15.fe4 Rg8 16.e5 Be7 17.d5 1–0. pozarski (1970) – chgrine (1820), GameColony.com, 2002.

5.d4 Bd6 6.c4 dc4 7.e3=.

5.d4 Bd6 6.c4 c5 7.cd5 ed5 8.dc5 Bc5 9.e3 0-0.

5.d4 Bd6 6.e3 0-0 7.c4 dc4 8.Bc4 c6 9.Nbd2 Bd7 10.a4 cb5 11.ab5 Qb6 12.Ba3 Ba3 13.Ra3 Ne8 14.0-0 Nd6= 15.Qb1 Rc8 16.Ne5 h6 17.Bd3 Be8 18.Nec4 Nc4 19.Nc4 Qd8 20.Qb3 b6 21.f4 g6 22.Qb2 Ra7 23.Raa1 Nd7 24.Nd6 Rcc7 25.e4 Nf6 26.e5 Nd5 27.Rf3 Rc3 28.Qd2 Rac7 29.f5 Qh4 30.Kh1 Qd4 31.Re1 Nf4 32.Rf4 (32.Rf4 Qd3 33.Qd3 Rd3 34.Ne8+–) 1–0. dominick1952 (2155) – Hitman (1760), internet, 2006.

5.d4 Bd6 6.e3 0-0 7.c4 dc4 8.Bc4 Nbd7 9.Bb2 c6.

5.d4 Bd6 6.e3 c6 7.c4 b6 8.cd5 ed5 9.Nc3 0-0.

5.d4 Bd6 6.e3 Nbd7 7.c4 dc4 8.Bc4 0-0 9.Bb2 c6.

5.d4 Nbd7 A) 6.Nbd2 Bd6 (6...c5 7.bc6 bc6 8.c4 c5 9.e3 Rb8; 6...c6 7.e3 c5 8.c4 cd4 9.ed4 dc4; 6...Be7 7.e3 c5 8.bc6 bc6 9.c4 Ba6) 7.c4 b6 8.e3 0-0 9.cd5 ed5; B) 6.c4 dc4 (6...Be7 7.Qc2 c5 8.bc6 bc6 9.Nc3 0-0) 7.e3 Nb6 8.Ne5 Bd7 9.Nc4 Nc4; C) 6.e3 Bd6 (6...c5 7.bc6 bc6 8.c4 Ba6 9.Nbd2 c5; 6...Be7 7.Nbd2 c5 8.bc6 bc6 9.c4 Ba6) 7.c4 dc4 8.Bc4 e5 9.Nc3 Qe7.

5.d4 Ne4 A) 6.e3 Bd6 (6...Qf6 7.c4 Bd6 8.Nbd2 c5 9.bc6 Nd2; 6...Nd7 7.c4 Qf6 8.Nbd2 Qg6 9.Bb2 Nd2) 7.c4 Qf6 8.Qc2 0-0 9.Bd3 Qg6; B) 6.Nfd2 Nd2 (6...Bd6 7.Ne4 de4 8.Nc3 f5 9.e3 0-0; 6...Nd6 7.e3 c6 8.Nc3 Bd7 9.Rb1 Be7; 6...Be7 7.Ne4 de4 8.e3 0-0 9.Nd2 f5) 7.Nd2 c5 8.e3 c4 9.Be2 a4; C) 6.Qd3 Nd7 (6...Bd6 7.c4 Nd7 8.c5 Be7 9.Nbd2 Nd2; 6...c5 7.Nbd2 Nd2 8.Bd2 c4 9.Qc3 Qb6) 7.Nbd2 Nd2 8.Bd2 Bd6 9.c4 dc4; D) 6.c4 dc4 (6...Be7 7.Nbd2 0-0 8.e3 c5 9.cd5 ed5; 6...c6 7.bc6 Nc6 8.e3 dc4 9.Bc4 Bd6; 6...c5 7.e3 Bd6 8.cd5 ed5 9.dc5 Bc5; 6...Nd7 7.Nbd2 Nd2 8.Nd2 Bd6 9.e4 Be7) 7.e3 Nd6 8.Nc3 Nd7 9.Ne5 Nb6; E) 6.Bf4 g5 (6...Nd7 7.e3 g5 8.Be5 f6 9.Bg3 h5) 7.Bd2 g4 8.Ne5 Qf6 9.Be3 Rg8.

5.d4 Be7 6.c4 0-0 (6...dc4 7.e3 c6 (7...0-0 8.Bc4 c6 9.bc6 Nc6 10.0-0 Qd6; 7...c5 8.Bb2 0-0 9.Bc4 Nbd7 10.0-0 Nb6; 7...Bd7 8.Bc4 c6 9.Nc3 0-0 10.0-0 cb5; 7...Bd6 8.Bc4 0-0 9.0-0 Nbd7 10.Nc3 e5) 8.Bc4 0-0 9.0-0 Bd7 10.Nc3 cb5) 7.Nc3 (7.c5 Ne4 (7...Nbd7 8.Nc3 Ne4 9.Qc2 Ndf6 10.e3 Nc3) 8.Nbd2 c6 9.e3 b6 10.Qc2 Nd2; 7.e3 c6 (7...c5 8.cd5 Qd5 9.Nc3 Qd6 10.e4 Qc7; 7...Nbd7 8.Nbd2 c5 9.bc6 bc6 10.Rb1 Ba6; 7...Bd7 8.Nc3 c6 9.bc6 Bc6 10.c5 b6; 7...Re8 8.Bd3 dc4 9.Bc4 c5 10.Bb2 Nbd7) 8.Nc3 Bd7 9.bc6 Nc6 10.Rb1 Rb8) 7...dc4 (7...Ne4 8.Qd3 Nc3 9.Qc3= c6 10.bc6 Nc6; 7...c5 8.cd5 ed5 9.dc5 Bc5 10.e3 Qd6) 8.e4 c5 9.bc6 (9.Bc4 cd4 10.Qd4 Qd4) 9...Nc6 10.Bc4 Qc7 (10...Qd7 11.0-0+=; 10...b6=) 11.0-0 Rd8 12.Nb5 Qb8 13.Re1 Na7 14.Na7 Qa7 15.Qd3 b6 16.e5 Nd5 (16...Nd7 17.Bg5 Nf8 18.Be7 Qe7 19.Rab1+=) 17.Ng5+/– Bg5 18.Bg5 Rd7 19.Qg3 Ne7 20.Be7 Re7 21.Qh4 Rd7 (21...h6 22.Re3+/–) 22.Bb5+– Re7 23.Rac1 h6 24.Re3 Kf8 25.Qe4 Kg8 (25...Ba6 26.Ba6 Qa6 27.Qh7+–) 26.Rg3 (26.Bd3 g6 27.Qh4 f6 28.Qh6 Ba6 29.Bg6 Bd3 30.Rd3 Rc7 31.Rc7 Qc7 32.Rg3 Qg7 33.Bh7 Kf8 34.Qg7 Ke8 35.Qc7 fe5 36.Rg8) 26...Ba6 27.Ba6 (27.Qh4 Kf8 28.Ba6 Qa6+–) 27...Qa6 28.Qh4 Kf8 (28...Rc8 29.Re1 Kf8 30.Qg4+/–) 29.Rg7! Kg7 30.Qe7 (30.Qf6 Kh7 31.Qe7 Ra7+–) 30...Rc8 (30...Qd3 31.Qf6 Kg8 32.Qh6 Qa3 33.h3+–) 31.Qf6 Kg8 32.Qh6 Rc1 33.Qc1 Qd3 34.Qa1 b5 35.h4 (35.h3 b4 36.ab4 ab4 37.Qa8 Kg7=) 35...b4 36.ab4 ab4 37.Kh2 b3 38.Qa3 (38.h5!?+/–) 38...Qc2= 39.Qa4 ½–½. Rosner,Dirk (2215) – Riojo,Francisco (1960), CiF, 2000.

5.d4 Be7 6.Nbd2 A) 6...c6 A1) 7.Rb1 cb5 8.Rb5 Qc7 9.e3 Bd7 10.Rb1 Ba4; A2) 7.bc6 Nc6 (7...bc6 8.Rb1 c5 9.dc5 Bc5 10.c4 Qe7) 8.e3 0-0 9.Bd3 Rb8 10.Rb1 Qc7; A3) 7.e3 0-0 (7...Bd7 8.bc6 bc6 9.c4 dc4 10.Nc4 0-0) 8.Rb1 c5 9.Be2 Nbd7 10.0-0 Nb6; B) 6...c5 7.dc5 Nbd7 (7...0-0 8.e3 Nbd7 9.Bb2 Nc5 10.Be2 Bd7; 7...Qc7 8.Bb2 0-0 9.c4 dc4 10.e3 Rd8) 8.c4 Nc5 9.Bb2 0-0 10.Rc1 dc4; C) 6...0-0 7.e3 c6 (7...c5 8.dc5 Nbd7 9.Bb2 Nc5 10.Be2 Bd7; 7...Bd7 8.Bd3 c6 9.bc6 Nc6 10.Rb1 Qc7; 7...b6 8.Ne5 Nfd7 9.Nd7 Bd7 10.Qh5 c6; 7...Ra7 8.Bd3 c6 9.bc6 bc6 10.0-0 c5) 8.bc6 Nc6 9.Bd3 a4 10.0-0 b6.

5.d4 Be7 6.Qd3 A) 6...0-0 7.Nbd2 c5 (7...c6 8.Rb1 cb5 9.Qb5 Ne4 10.Qd3 Nd2; 7...Nbd7 8.e4 de4 9.Ne4 Ne4 10.Qe4 Nf6; 7...a4 8.e4 de4 9.Ne4 Nbd7 10.Nf6 Nf6) 8.bc6 bc6 9.c4 c5 10.cd5 ed5; B) 6...c6 B1) 7.Bg5 Bd7 (7...0-0 8.e3 cb5 9.Qb5 b6 10.Qb2 Nbd7; 7...Nbd7 8.Nbd2 c5 9.c4 h6 10.Bh4 Qb6; 7...h6 8.Bf4 Bd7 9.Nc3 0-0 10.Ne5 a4; 7...cb5 8.Qb5 Nc6 9.e3 Ra6 10.Qa4 Rb6) 8.bc6 Nc6 9.Nbd2 b5 10.e3 b4; B2) 7.Nc3 0-0 (7...Nbd7 8.e4 de4 9.Ne4 Ne4 10.Qe4 Nf6; 7...Bd7 8.Ne5 cb5 9.Nb5 Nc6 10.Bf4 Nh5; 7...c5 8.e4 cd4 9.Qd4 de4 10.Qd8 Bd8) 8.Bf4 Nbd7 9.e4 de4 10.Ne4 Ne4; B3) 7.c4 dc4 (7...0-0 8.Nc3 dc4 9.Qc4 Bd7 10.bc6 Bc6; 7...Bd7 8.cd5 ed5 9.Nc3 0-0 10.Bg5 Ne4) 8.Qc4 Bd7 9.Nc3 0-0 10.bc6 Bc6; B4) 7.Nbd2 0-0 (7...Bd7 8.bc6 Bc6 9.Rb1 Nbd7 10.e3 b5) 8.Rb1 cb5 9.Qb5 Na6 10.e3 Qc7; C) 6...c5 C1) 7.dc5 Ne4 (7...Nbd7 8.c6 bc6 9.bc6 Nb8 10.c4 Nc6; 7...0-0 8.Bg5 Nbd7 9.c6 bc6 10.bc6 Nc5) 8.Nc3 Nc5 9.Qd4 b6 10.Bf4 0-0; C2) 7.bc6 bc6 (7...Nc6 8.Nbd2 b6 9.e4 de4 10.Ne4 0-0) 8.c4 0-0 9.Nbd2 c5 10.cd5 ed5.

5.d4 Be7 6.e3 A) 6...0-0 A1) 7.Be2 c6 (7...Bd7 8.0-0 c6 9.Nc3 cb5 10.Nb5 Ne4; 7...Ne4 8.0-0 c6 9.bc6 Nc6 10.c4 b6; 7...Bd6 8.0-0 Nbd7 9.Nbd2 c5 10.bc6 bc6; 7...Nbd7 8.0-0 c5 9.dc5 Nc5 10.Bb2 Bd7) 8.Nc3 a4 9.0-0 Nbd7 10.Rb1 c5; A2) 7.Nbd2 c5 (7...Bd7 8.Bd3 c6 9.bc6 Bc6 10.Rb1 Nbd7; 7...c6 8.Rb1 c5 9.Be2 Nbd7 10.dc5 Nc5; 7...b6 8.Ne5 Nfd7 9.Nd7 Nd7 10.Bd3 e5; 7...Ra7 8.Bd3 c6 9.0-0 cb5 10.Bb5 Bd7) 8.dc5 Nbd7 9.Bb2 Nc5 10.Be2 Bd7; A3) 7.c4 c6 (7...c5 8.cd5 ed5 9.dc5 Bc5 10.Be2 Qe7; 7...Bd7 8.Nc3 c6 9.bc6 Nc6 10.Rb1 Rb8; 7...b6 8.cd5 ed5 9.Qc2 Qd6 10.Ne5 Bb7; 7...Re8 8.Bd3 dc4 9.Bc4 c6 10.0-0 cb5) 8.Nc3 Bd7 9.bc6 Nc6 10.Rb1 dc4; A4) 7.Bd3 c6 (7...c5 8.dc5 Nbd7 9.Bb2 Nc5 10.0-0 Bd7; 7...a4 8.0-0 Nbd7 9.Nbd2 c5 10.bc6 bc6; 7...Bd6 8.Nbd2 c6 9.bc6 Nc6 10.c4 b6; 7...Nbd7 8.Nbd2 c5 9.bc6 bc6 10.Rb1 c5) 8.Nc3 Nbd7 9.bc6 bc6 10.e4 de4; B) 6...Ne4 B1) 7.c4 0-0 (7...c6 8.Bd3 0-0 9.0-0 f5 10.a4 cb5; 7...Nd7 8.Bd3 0-0 9.0-0 c6 10.bc6 bc6) 8.Bd3 c6 9.0-0 f5 10.a4 cb5; B2) 7.Nfd2 Nd6 (7...f5 8.Be2 0-0 9.c4 c6 10.0-0 cb5; 7...Nd2 8.Nd2 Bf6 9.c4 e5 10.cd5 Qd5) 8.Bd3 Nd7 9.Qf3 Nf6 10.0-0 a4; B3) 7.Bd3 0-0 (7...c6 8.c4 cb5 9.cb5 Nd7 10.Nbd2 Ndf6; 7...Nd7 8.0-0 Nb6 9.Nfd2 Nd6 10.Qe2 Bf6; 7...c5 8.0-0 0-0 9.c4 Nd7 10.Bb2 f5; 7...Bd7 8.c4 c6 9.bc6 Nc6 10.0-0 0-0) 8.0-0 c6 9.c4 f5 10.cd5 ed5; C) 6...Bd7 7.Bd3 0-0 (7...c6 8.bc6 Nc6 9.Nbd2 0-0 10.Rb1 Qc7; 7...a4 8.Nbd2 0-0 9.Rb1 c6 10.Ne5 cb5) 8.0-0 a4 9.c4 dc4 10.Bc4 c6; D) 6...c6 D1) 7.Nc3 Nbd7 (7...0-0 8.Bd3 Nbd7 9.bc6 bc6 10.e4 de4; 7...Bd7 8.Bd3 0-0 9.0-0 cb5 10.Nb5 Bb5; 7...cb5 8.Nb5 Nc6 9.Bd3 0-0 10.0-0 Bd7; 7...Qc7 8.Bd3 Nbd7 9.bc6 Qc6 10.Nb5 Ne4) 8.Bd3 c5 9.dc5 Nc5 10.Bb2 0-0; D2) 7.c4 0-0 (7...Bd7 8.bc6 Nc6 9.Nc3 0-0 10.Rb1 Rb8) 8.Nc3 Bd7 9.bc6 Nc6 10.Rb1 Rb8; D3) 7.a4 Nbd7 (7...0-0 8.Ba3 Bb4 9.Bb4 ab4 10.bc6 bc6; 7...cb5 8.Bb5 Bd7 9.Ba3 Bb5 10.ab5 0-0; 7...Ne4 8.Ba3 0-0 9.Bd3 c5 10.0-0 b6) 8.Bd3 cb5 9.ab5 0-0 10.Ba3 Nb6.

5.d4 Be7 6.Ne5 A) 6...0-0 A1) 7.Bg5 Nbd7 (7...h6 8.Bf4 c5 9.e3 c4 10.Be2 a4; 7...c5 8.e3 Nbd7 9.c4 cd4 10.ed4 Qc7) 8.Nd7 Qd7 9.e3 c5 10.bc6 bc6; A2) 7.Bf4 Nh5 8.Bd2 Nd7 9.e4 Nhf6 10.Nd7 Nd7; A3) 7.e3 c5 (7...Bd6 8.c4 Nbd7 9.Nd7 Qd7 10.c5 Be7; 7...Nbd7 8.Bd3 Bd6 9.f4 Ne4 10.Qf3 f6; 7...Ne4 8.Bd3 Nd7 9.Nd7 Bd7 10.0-0 c5) 8.dc5 Ne4 9.Bb2 Nc5 10.c4 dc4; B) 6...c5 B1) 7.e3 Nbd7 (7...Qc7 8.Bb2 c4 9.Be2 Nbd7 10.0-0 Ne4; 7...0-0 8.dc5 Nbd7 9.Bb2 Nc5 10.Be2 Qc7; 7...Nfd7 8.c4 0-0 9.Bb2 Ne5 10.de5 b6; 7...c4 8.Be2 Nbd7 9.Nc3 Qc7 10.Nd7 Bd7) 8.Be2 Qc7 9.Bb2 0-0 10.0-0 cd4; B2) 7.Bg5 cd4 (7...Nbd7 8.e3 0-0 9.c4 dc4 10.Nc4 cd4; 7...0-0 8.e3 Nbd7 9.c4 dc4 10.Nc4 cd4) 8.Qd4 Qc7 9.Qc3 Qc3 10.Nc3 Nbd7; B3) 7.bc6 Nc6 8.Bf4 Qb6 9.Nc6 bc6 10.Nc3 a4; B4) 7.c4 cd4 8.Qd4 Nbd7 9.Nd3 dc4 10.Qc4 Nb6; B5) 7.dc5 Bc5 (7...Nbd7 8.Bb2 Ne5 9.Be5 0-0 10.e3 Ne4; 7...0-0 8.Bb2 Ne4 9.e3 Nc5 10.c4 dc4) 8.Bb2 0-0 9.e3 Bd6 10.c4 Nbd7; C) 6...Nbd7 7.e3 (7.Bf4 Nh5 8.Bc1 0-0 9.Nd7 Bd7 10.e4 g6) 7...0-0 (7...Ne4 8.Bd3 Nec5 9.0-0 Ne5 10.de5 0-0; 7...Ne5 8.de5 Nd7 9.Bb2 c6 10.Nd2 0-0; 7...Bd6 8.Bb2 c6 9.c4 0-0 10.cd5 cd5; 7...a4 8.Bd3 0-0 9.0-0 Ne5 10.de5 Nd7) 8.Bd3 Bd6 9.f4 Ra7 10.Qf3 Nb6.

5.d4 Be7 6.Bf4 A) 6...Nbd7 A1) 7.Qd3 Nh5 (7...Nb6 8.Nbd2 Nh5 9.Be5 f6 10.Bg3 g5; 7...c5 8.bc6 bc6 9.Nbd2 c5 10.c4 Nh5; 7...0-0 8.Qc3 Bd6 9.Bd6 cd6 10.e3 Ne4; 7...c6 8.Nc3 0-0 9.e4 de4 10.Ne4 Ne4) 8.Bd2 0-0 9.Nc3 c5 10.e4 cd4; A2) 7.e3 Nh5 (7...0-0 8.Bd3 Nh5 9.Be5 c6 10.bc6 bc6; 7...c5 8.bc6 bc6 9.Nbd2 c5 10.Ne5 Ne5) 8.Be5 0-0 9.Bd3 Ne5 10.Ne5 Nf6; B) 6...a4 B1) 7.Ne5 Nh5 (7...c5 8.bc6 Nc6 9.e3 Ne5 10.Be5 0-0) 8.Bd2 0-0 9.e3 Nf6 10.Bd3 c5; B2) 7.Qd3 Nh5 (7...0-0 8.e3 c5 9.c4 Nbd7 10.Be2 cd4; 7...c5 8.dc5 Ne4 9.Nc3 Qa5 10.Bd2 Nd2; 7...Bd7 8.Nc3 c6 9.bc6 Nc6 10.e4 de4; 7...c6 8.e3 Bd7 9.Nc3 Qa5 10.Nd2 0-0) 8.Bd2 0-0 9.c4 Nf6 10.Nc3 dc4; B3) 7.e3 Nh5 (7...0-0 8.Bd3 Nbd7 9.0-0 Nh5 10.Be5 c6; 7...Nbd7 8.Ne5 0-0 9.Bd3 Ne5 10.Be5 c5) 8.Be5 0-0 9.Bd3 Nd7 10.c4 dc4; C) 6...Bd7 7.e3 Nh5 (7...c6 8.c4 dc4 9.bc6 Bc6 10.Bc4 Nbd7) 8.Be5 f6 9.Bg3 0-0 10.Bh4 g5; D) 6...0-0 7.e3 Nh5 (7...Nbd7 8.Bd3 a4 9.Ne5 Ne5 10.Be5 c5; 7...a4 8.Bd3 Nbd7 9.0-0 Nh5 10.Be5 c6; 7...c6 8.Nc3 a4 9.Bd3 Qa5 10.Qd2 Bd7; 7...Bd7 8.Bd3 c6 9.Nc3 cb5 10.Nb5 Bb5) 8.Be5 Nd7 9.Bd3 Ne5 10.Ne5 Nf6.

5.d4 Be7 6.Bg5 A) 6...Nbd7 7.e3 Bd6 (7...c5 8.bc6 bc6 9.c4 0-0 10.Nbd2 c5; 7...0-0 8.Bd3 c5 9.bc6 bc6 10.Nc3 c5) 8.c4 h6 9.Bh4 Be7 10.Bd3 dc4; B) 6...h6 B1) 7.Bf6 Bf6 8.e3 0-0 9.c4 c5 10.bc6 bc6; B2) 7.Bf4 0-0 (7...Nbd7 8.e3 0-0 9.Bd3 Nh5 10.Be5 Ra7) 8.e3 Nh5 9.Be5 f6 10.Bg3 Ng3; B3) 7.Bh4 0-0 (7...c6 8.e3 a4 9.bc6 Nc6 10.Bd3 0-0; 7...c5 8.e3 Nbd7 9.Be2 Qb6 10.Nc3 c4; 7...g5 8.Bg3 Ne4 9.Nbd2 Nc3 10.Qc1 Nb5) 8.e3 Nbd7 9.Bd3 c5 10.bc6 bc6; C) 6...c5 C1) 7.e3 c4 (7...Nbd7 8.Be2 0-0 9.0-0 h6 10.Bh4 c4; 7...h6 8.Bh4 Nbd7 9.Be2 0-0 10.0-0 c4; 7...0-0 8.dc5 Qc7 9.c4 Rd8 10.Nbd2 Qc5; 7...Qb6 8.dc5 Qc5 9.Bd3 Nbd7 10.0-0 e5) 8.Nc3 a4 9.Ne5 Nbd7 10.Be2 0-0; C2) 7.bc6 Nc6 (7...bc6 8.e3 Ba6 9.c4 dc4 10.Nbd2 c3) 8.e3 h6 9.Bf6 Bf6 10.Bb5 0-0; C3) 7.dc5 Nbd7 8.c6 bc6 9.bc6 Nb8 10.e3 Nc6; D) 6...c6 D1) 7.Nc3 0-0 (7...cb5 8.Nb5 0-0 9.e3 Bd7 10.Bd3 Bb5; 7...Nbd7 8.e3 0-0 9.Bd3 c5 10.0-0 c4; 7...Bd7 8.e3 0-0 9.Bd3 h6 10.Bf4 cb5; 7...c5 8.e3 Nbd7 9.Be2 h6 10.Bf4 0-0) 8.e3 Nbd7 9.Bd3 c5 10.0-0 c4; D2) 7.Qd3 Bd7 (7...0-0 8.e3 Bd7 9.bc6 Nc6 10.Nbd2 b5; 7...h6 8.Bf4 0-0 9.Nc3 Nbd7 10.e4 de4; 7...a4 8.Nbd2 0-0 9.e3 cb5 10.Qb5 Nc6; 7...cb5 8.Qb5 Nc6 9.e3 Ra6 10.Nbd2 Rb6) 8.bc6 Nc6 9.e3 0-0 10.Be2 h6; D3) 7.e3 0-0 (7...Bd7 8.Nc3 0-0 9.Bd3 cb5 10.Nb5 Bb5; 7...a4 8.bc6 Nc6 9.Bd3 Qa5 10.Qd2 Qd2; 7...cb5 8.Bb5 Bd7 9.Bd3 0-0 10.Nbd2 Qc7; 7...Nbd7 8.c4 c5 9.Be2 dc4 10.Bc4 Nb6) 8.c4 h6 9.Bf4 dc4 10.Bc4 Nd5; E) 6...0-0 7.e3 h6 (7...c6 8.Nc3 cb5 9.Nb5 Bd7 10.Bd3 Bb5; 7...c5 8.dc5 Qc7 9.c4 Rd8 10.Nbd2 Qc5; 7...Bd7 8.Bd3 c6 9.bc6 Nc6 10.Nbd2 Rb8) 8.Bf6 Bf6 9.c4 c5 10.bc6 Nc6.

5.e3 (--> 3.Nf3 d5 4.e3 a5 5.b5).

5.g3 c6 6.a4 cb5 7.ab5 b6 8.Nc3 d4 9.Na4= Qd5?? 10.Nb6+– Qb7 11.Na8 Qa8 12.Bb2 Bc5 13.Bg2 Bb7 14.0-0 0-0 15.Ra4 e5 16.c3 Rd8 17.cd4 ed4 18.Qa1 Bb6 19.Bd4 Bd4 20.Rd4 Nbd7 21.Ra4 Nb6 22.Ra5 Qb8 23.d3 h6 24.Rc1 Qd6 25.Ra7 (25.Ra7 Bf3 26.Bf3+– (< 26.ef3 Qd3 27.Qb1 Qe2+–)) 1–0. gtate (2765) – igivanov (2540), net–chess.com, 2009.

5.g3 Bd6 6.Bg2 0-0 7.0-0 e5 8.d3 Qd7 9.a4 Re8 10.Nbd2 e4 11.de4 de4 12.Ng5 Qf5 13.Nc4 Be7 14.Nh3 Qc5 15.Nd2 Bh3 16.Bh3 Qh5 17.Kg2 Nbd7 18.Bb2 Rad8 19.e3 Qh6 20.Qe2 Nb6 21.Nc4 Bb4 22.Ra2 Rd5 23.Bf6 Qf6 24.Kg1 Nc4–/+ 25.Qc4 Rc5 26.Qe2=+ Bc3 27.Rd1 h5 28.Ra3 h4 29.Rb3 Qh6 30.Kg2 Qf6 31.Kg1 hg3 32.fg3 Qh6 33.Bg4 Qg5 34.h4 Qg6 35.Kh2 Be5–/+ 36.h5 Qg5–+ 37.Kg1 Bg3 38.b6 Qh4 39.Rb5 Bf2!! 40.Kf1 Bg3 41.Kg1 Rc3 42.Rc1? c5 43.Rb3 Re5 44.Rd1?? Rb3 45.cb3 Rg5 0–1. gtate (2450) – alextrotzky (2480), net–chess.com, 2007.

6.Bb2 Nbd7 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 c5 6.e3 Nbd7 7.c4).

6.c4 b6 7.Bb2 Nbd7 8.Be2 Bd6 9.d4 Bb7 10.Nbd2 0-0 11.0-0 Rc8 12.h3 Qe7 13.Ne5 cd4 14.ed4 dc4 15.Ndc4 Bb8 16.Bf3 Ne5 17.de5 Rfd8 18.Qe2 Bf3 19.Qf3 Nd7 20.Rac1 Rc5 21.a4 Qh4 22.g3 Qh3 23.Rfd1 Rcc8 24.Rd4 Nf8 25.Qb7 Re8 26.Qb6 Ng6 27.Re1 f6 28.Nd6 Ne5 29.Re5 Bc7 30.Qa6 Bd6 31.Rh4 Qh4 32.gh4 fe5 33.Qa5 Rc2 34.Qa6 Bc5 35.Be5 Rf2 36.Bd6 Be3 37.Bg3 Rc2 38.Kf1 Bc5 39.Ke1 e5 40.b6 Bb4 41.Kd1 Rec8 42.Qc8 Rc8 43.Be5 Rd8 44.Kc2 Rd7 45.Bc3 Bc5 0–1. Liptak – Nemes, 1996.

6.c4 d4 7.Bb2 de3 8.de3 Qd1 9.Kd1 b6 10.Nbd2 Bb7 11.Bd3 Nbd7 12.Kc2 Bd6 13.h3 Bc7 14.e4 e5 15.Rae1 ½–½. Nepustil – Hruska, 1997.

6.c4 Bd6 7.Bb2 0-0 8.d4 b6 9.Nbd2 Bb7 10.h3 Nbd7 11.Bd3 Ne4 12.Qc2 f5 13.Rg1 Ndf6 14.g4 cd4 15.Nd4 Qd7 16.gf5 ef5 17.Nc6 Nd2 18.Kd2 Bc6 19.bc6 Qc6 20.Rg2 Kh8 21.Rag1 Ra7 22.Bf5 dc4 23.Bh7 Bh2 24.Rg7 Rd7 25.Kc1 Bg1 26.Qg6 c3 0–1. Liptak – Varga, 1996.

6.c4 Nbd7 7.d3 Bd6 8.Nbd2 0-0 9.Bb2 b6 10.g3 Bb7 11.Bg2 Qe7 12.0-0 Rad8 13.Re1 Ng4 14.Qc2 f5 15.Rad1 Bb8 16.Qb3 Kh8 17.h3 Ngf6 18.a4 e5 19.cd5 Bd5 20.Nc4 Bc7 21.Qc3 Rde8 22.Qc2 e4 23.de4 fe4 24.Ng5 Bb7 25.h4 Be5 26.Bh3 Bb2 27.Qb2 Bd5 28.Bd7 Bc4 29.Be8 Re8 30.Qc3 Bg8 31.Nh3 Ng4 32.Nf4 Ne5 33.Kg2 Nf3 34.Rh1 Bf7 35.h5 Ne5 36.Rd2 Kg8 37.Rhd1 Qg5 38.Rh1 Qg4 39.Rh4 Qf5 40.Rd6 Nc4 41.h6 Qg5 42.Rg6 Qe5 43.Rg7 Kh8 44.Ne2 Nd6 45.Qe5 Re5 46.Rf4 1–0. Anastasian – Dvoirys, Rostov 1993.

6.bc6 bc6 7.c4 Bd6 8.d4 0-0 9.Bd3 Nbd7 10.Bb2 Rb8 11.Qc2 dc4 12.Bc4 c5 13.Nbd2 Bb7 14.dc5 Nc5 15.0-0 Qc7 16.Bf6 gf6 17.Rfc1 a4 18.Bd3 Kg7 19.Qc4 Rg8 20.Ne4 Be4 21.Be4 Nb3 22.Qc7 Bc7 23.Rc7 Na1 24.h4 Rgc8 25.Ra7 Rc4 26.Nd4 Rb6 27.Bf3 Nb3 28.Bh5 Nd4 29.ed4 Rd4 30.g4 f5 31.Rf7 Kg8 32.Ra7 fg4 33.Kg2 h6 34.Bf7 Kf8 35.h5 Rf4 36.Bg6 Rb2 37.Rh7 Rbf2 38.Kg3 R2f3 39.Kg2 Ra3 40.Rh6 Rb4 41.Rh8 Kg7 42.Rh7 Kg8 43.Rf7 Rb2 44.Kf1 Ra1 0–1. Hodgson – Kraidman, 1982.

4.Bb2 Bb7 5.e3 c5 6.b5 d5 7.c4 Be7 8.Be2 0-0 9.0-0 Nbd7 10.a4 a5 11.ba6 Ba6 12.Na3 Qc7 13.d3 e5 14.cd5 Nd5 15.Qb3 Nb4 16.Nc4 Bf6 17.Rfc1 Rac8 18.Nfd2 Bb7 19.Ba3 Nd5 20.Rab1 Bc6 21.Bb2 Rfe8 (21...Ra8 22.Ra1=) 22.Bh5 g6 (22...Ra8 23.Ra1 Reb8 24.Bg4=) 23.Bf3+= Rb8 24.Na3 Nb4 25.Nb5 Bb5 26.ab5 Qd6 27.Ne4 Qd3 (27...Qe6 28.Qe6 Re6+/– (28...fe6? 29.Nf6 Nf6 30.Be5+–)) 28.Qd3?? (28.Qa4 Kg7 A) 29.Nf6 Nf6 (worse is 29...Kf6 30.Rd1 Qf5 31.Bc6 Nc6 32.bc6+–) 30.Rd1 Qf5+=; B) 29.Rd1+–) 28...Nd3+= 29.Rd1 c4 30.Nd6 Nb2 31.Ne8 (better is 31.Rb2 Red8 32.Ra2=) 31...Nd1–+ 32.Rd1 Re8 33.Rd7 e4 34.Be2 Rc8 35.Rd1?? (35.Bd1 Ra8 36.Kf1 Ra1–/+) 35...Bb2 (better is 35...c3 36.Rc1 c2–+) 36.Rd2 c3 37.Rc2 Rd8 38.g4 Rd5 39.Kg2 Kg7 40.Kg3 g5 41.h4 h6 42.hg5 hg5 43.f3 ef3 44.Kf3 Kf6 45.Ke4 Rc5 46.Kd4 Ke7 47.Ke4 (47.e4 Rc8–/+) 47...Kd6 48.Kd4 (48.Bd3 Rd5–+) 48...Rd5 49.Kc4 Ke5 (49...f5!? 50.gf5 Rf5 51.Kd4–+) 50.Bd3–/+ Rc5 51.Kb3 f6 52.Rf2 Rc8 53.Rf5 Ke6 ½–½. Bigalke,Andre (1965) – Svensen,Tarjei Joten, Wichern op 5th, 1999. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6)

4.Bb2 c5 5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 d5 9.e3 Nbd7 10.d3 Bd6 11.Nbd2 0-0 12.c4 Qc7 13.Be2 Bb7 14.0-0 dc4 15.Nc4 Bf3 16.gf3 Bh2 17.Kg2 Bd6 18.f4 e5 19.Nd6 Qd6 20.fe5 Ne5 21.d4 (21.f4?! Ng6 22.f5 Nd5) 21...Qd5 22.Kh2 (22.Bf3 Nf3 23.Qf3 Ne4; 22.f3 Neg4; 22.Kg1 Ng6 23.dc5 Qg5) 22...cd4 23.Bd4 h5 24.f3 (24.Bh5? Nh5 25.Qh5 Nf3) 24...Qd6 25.Kg2 Ng6 26.Rh1 Rd8 27.Qc2 h4 28.Qf5 (28.f4 Nf4; 28.Rh3 Nd5 idea Nf4; 28.Bf6 Qf6) 28...Qg3 29.Kf1 Nf4 30.Qf4 (30.Rg1 Ne2; 30.ef4 Rd4) 30...Qf4 31.ef4 Rd4 32.Rh4 Nd5 0–1. Serebrisky – Stern, corr 1984.

4.b5 Bb7 5.e3 Be7 6.d4 a6 7.Nbd2 ab5 (7...0-0 8.Bb2+=) 8.Bb5= 0-0 9.Bd3 d5 10.0-0 Nbd7 11.Bb2 Ne4 (11...c5 12.dc5 Nc5 13.Qe2+=) 12.c4= Bd6 13.Qc2 f5 14.Ne5 (better is 14.Rfb1!?=) 14...Be5 15.de5 Ndc5 (15...Nd2!? 16.Qd2 Nc5–/+) 16.Ne4+= de4 (16...Nd3 17.Nf6 gf6 18.Qd3 fe5 19.e4=) 17.Be2= Qg5 18.Bd4 Nd3 19.f4 Qg6 20.c5 Bd5 (20...bc5 21.Bc5 Rfd8 22.Rfd1=) 21.Rfb1 (21.cb6 c5 22.Bc3 Rfb8=) 21...bc5= 22.Bc5 Rfc8 23.a4 Qe8 24.Bd1 (24.Ra3 Rcb8 25.Bd3 ed3 26.Qd3 Rb1 27.Qb1 Bg2 28.Kg2 Qc6 29.Kf2 Qc5=) 24...Ra5 (worse is 24...Nc5 25.Qc5 c6 26.a5+=) 25.Bd4 c5 26.Bc3 Raa8 27.Rb6 Rc6 28.Rab1 (28.Rc6!? Bc6 29.a5=) 28...Nb4–/+ 29.Bb4 Rb6 30.Qc5 Qb8 31.Qd4? (better is 31.Kf2!?–/+) 31...Qb7–+ 32.a5 Ra5! 33.Ba5 Rb1 34.Qa4?? (34.Kf2–+) 34...Qc6 (34...Qc6 35.Kf2 Qa4 36.Ba4 Ra1–+) 0–1. Walter,Guenter – Lorenz,Gerd, Freiberg, 1970. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6)

4.c4 a5 5.b5= d5 6.Bb2 (6.cd5 ed5 7.Nc3 Bd6=) 6...Nbd7 (6...Bd6 7.Nc3=) 7.e3 Be7 (7...Bd6 8.cd5 ed5 9.Nc3=) 8.Nd4 (8.cd5 ed5 9.Nc3 0-0=) 8...Bb7 9.cd5 ed5 10.Nc6 Bc6 11.bc6 Nc5 12.d4 Ne6 (12...Nce4 13.Bd3+=) 13.Nc3+= 0-0 14.Qc2 Ng5 15.Bd3 b5 (better is 15...Bd6!?+=) 16.Nb5+– Rb8 (16...Ne6 17.0-0+–) 17.Bc3 Nfe4 (17...Nge4 18.Ba5 Ne8 19.0-0+–) 18.h4 (better is 18.Ba5!? Bd6+–) 18...Ne6 19.Ba5 f5 20.g3 (20.h5 Ra8 21.Bd2 Bh4+–) 20...Rf6 (20...Ra8 21.Bd2+/–) 21.Bb4 (21.Rb1 Ra8 22.Bb4 Rg6+–) 21...Bb4 (21...Rb6 22.0-0+/–) 22.ab4+– Qe7 23.0-0 Rg6 24.Be4 (24.Kh2 Qb4 25.Rfb1 Qf8+–) 24...fe4 (24...de4 25.d5 Rb5 26.de6+–) 25.Nc3+– Qh4 26.Nd5 Qg4?? (26...Rf8 27.Ra7 Rf3+=) 27.Ne7 Kf7 28.Ng6 hg6 (28...Kg6 29.f4 Qg3 30.Qg2 Qg2 31.Kg2+–) 29.Ra5 (better is 29.f3 Qg3 30.Qg2 Qg2 31.Kg2+–) 29...Rh8 (29...Ng5 30.Rg5! Qg5 31.Qe4 Qf5 32.Qf5 gf5+–) 30.f3! ef3 (30...Qg3 31.Qg2 Qg2 32.Kg2 ef3 33.Rf3 Ke7 34.Rd5+–) 31.Qf2 Ng5 (31...Ke7 32.Qf3 Qf3 33.Rf3 Kd6+–) 32.Rg5! Qg5 33.Qf3 Kg8 34.Qf7 Kh7 35.Kg2 Rf8 36.Rh1 Qh6 37.Rh6 Kh6 38.Qf8 Kg5 39.Qf4 1–0. antinephilehi (1910) – roy1nc6 (1985), gameknot.com, 2014.

4.c4 Bb7 5.e3 c5 6.bc5 Bc5 7.Be2 0-0 8.0-0 Be7 9.d3 d6 (9...d5 10.cd5 Qd5 11.Nc3=) 10.Bb2 Nbd7 11.a4 Nc5 12.Nbd2 Qc7 13.Bc3 White prepares a5 13...e5 (13...Rfc8 14.a5=) 14.a5 ba5 15.Ba5 Qc8 16.d4 Ncd7 17.Qc2 Re8 18.Rfb1 ed4 19.ed4 d5 20.c5 Bc6 21.Nf1 Ne4 22.Ne3 Rb8 (22...Bf6 23.Bd3+=) 23.Bd3 g6 (23...Rb1 24.Rb1 Bf6 25.Qa2+=) 24.Rb8 Qb8 25.Qa2 Qa8 (25...Qb7 26.Nd2 Nd2 27.Bd2+/–) 26.Bc7 Ng5 (26...Bf6 27.Qa7 Ndc5 28.Qa8 Ba8 29.Bb5+= (29.dc5 Ba1 30.Bb6 Bc3–+)) 27.Ng5+– Bg5 28.Qa7 (28.Nc2 Qc8 29.Bd6 Nf6+–) 28...Qc8 (28...Qa7!? 29.Ra7 Re3 30.fe3 Be3 31.Kf1 Bd4+/–) 29.Ba6+– Qa8 30.Bf1 (30.Qa8 Ra8 (30...Ba8?? 31.Bb5+–) 31.Nc2 Nf8+–) 30...Qc8 (30...Qa7 31.Ra7 h6 32.Nc2+–) 31.Ng4 (31.f4 Bd8 32.Bd8 Qd8+–) 31...Nf8+– 32.Qb6 Qg4 33.Qc6 Rc8 34.Ra8 (34.Ba6 Qd4 35.Rf1 Rc7 36.Qc7 Ne6 37.Qc8 Kg7+–) 34...Bf4 (34...Ra8 35.Qa8 Qd7+–) 35.h3 Bc7 36.hg4 Bh2 37.Kh2 Rc6 38.Be2 (38.Rd8 f6+–) 38...Kg7 39.Bf3 Rf6 (39...Ne6 40.Bd5 Rc7 41.Be6 fe6 42.g5+–) 40.Bd5 Rf2 (40...Ne6 41.Be6 fe6 42.Ra7 Kh6 43.Kg3+–) 41.c6 1–0. Tichy,Vladimir – Pekarek,Ales, Trnava, 1985. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6)

4.c4 Be7 5.g3 0-0 6.d4 Bb7 7.Bg2 d5 8.0-0 dc4–/+ 9.Re1 b5 10.Ne5 Bg2–+ 11.Kg2 a6 12.Nc3–/+ Qd6 13.f3 Nbd7 14.Nd7 Qd7–+ 15.e4 Qd4?? 16.Qd4+– (16.Qd4 c5 17.bc5+–) 1–0. gdraper (2035) – guerino (2100), net–chess.com, 2006.

4.c4 g6 5.Nc3= Bg7 6.d4 Bb7 7.e3 0-0 8.Be2 d5 9.0-0 Nbd7 10.cd5 Nd5 11.Nd5 Bd5 12.Qc2 c5 (12...Nf6!?=) 13.e4+= Bb7 14.Bg5 Qc8 (14...Qb8 15.dc5 Ba1 16.Ra1+=) 15.Rac1+/– cd4? (better is 15...h6 16.Bh4 Nf6+/– (16...cd4? 17.Qa4 Qe8 18.Bb5+–)) 16.Qa4+– Qe8 17.Bb5 Be4 18.Nd2 (18.Bd7 Qb8 19.Bc6 Bc6 20.Rc6 h6+–) 18...Bb7 (better is 18...Bd5 19.Bd7 Qb8+–) 19.Bd7 Qb8 20.Be7 Bh6 (20...Qf4 21.Bf8 Rf8 22.Rfd1+–) 21.Rfd1 (21.Bf8?! Bd2 22.Rcd1 Qf4 23.Rd2 Qd2+/–) 21...a6 (21...Qe5 22.Bf8 Rf8 23.Bc6 Bc6 24.Qc6+– (24.Rc6?! Bd2 25.Qa7 d3=)) 22.Bf8 Kf8 23.Bc6 b5 (23...Kg8 24.Qb3+–) 24.Qc2 f5 (24...Bc6 25.Qc6 Kg7+–) 25.Qc5 Kf7 (25...Kg8 26.Qe7 Bc6 27.Qe6 Kh8 28.Rc6+–) 26.Qd4 Bc6 27.Rc6 Qb7 (27...Qd8 28.Qe5 Ra7 29.Qe6 Kg7 30.Qe5 Kg8+–) 28.Rdc1 Kg8 29.Rc7 Qd5 30.Qf6 Rf8 (30...Qg2 31.Kg2 Rf8 32.Qe7 Rf6 33.Qh7 Kf8 34.Rc8) 31.Qe7 Qd2 (31...Qg2 32.Kg2 Rf6 33.Qh7 Kf8 34.Rc8) 32.Qh7 1–0. gambitqueen17 (2305) – branwell (2275), gameknot.com, 2014.

4.d3 d5 5.e4 de4–/+ 6.de4 Qd1 7.Kd1 Ne4 8.Ke1 Bb7 9.Bb2 Nd7 10.Nc3 Bd6 11.Ne4 Be4 12.Bg7 Rg8 13.Bb2 0-0-0 14.h4 Bc2 15.Ng5=+ Rdf8 16.Rc1 Bg6 17.h5 Bf5 18.g4 Rg5 19.gf5 ef5 20.Ba6 Kb8 21.Bb5 Rd8 22.Rd1 f4 23.Bc4 Ne5 24.Bb3 c5 25.bc5 bc5–+ 26.Kf1 Kc7 27.Bc3 Rb8–+ 28.Ba5 Kd7 29.Bc2 Ke6 30.Bh7 Rh8 31.Be4 Rgh5 32.Rh5 0–1. Sandeman_be – miquelstone, ChessWorld.net, 2005.

4.d4 c5 5.c3 d5 6.Bg5 Be7 7.e3 0-0 8.Bd3 Nbd7 9.Nbd2 Qc7 10.Qb1 (10.Bf4 Bd6 11.Bd6 Qd6=) 10...h6 (10...Bd6 11.c4=) 11.Bf4 Bd6 12.Bd6 Qd6 13.0-0 a5 14.Qc2 Rd8 15.Be2 Qc7 16.bc5 bc5 17.Rfc1 c4 18.Rcb1 Bb7 19.Ra2 Rdb8 20.Rab2 Bc6 21.Bd1 Re8 22.Qc1 Qd6 23.a4 Rab8 24.Rb8 Rb8 25.Rb2 Rb6 26.Qa1 Rb2 27.Qb2 Qb8 28.Qa1 Nb6 Attacking the isolated pawn on a4 29.Ne5 Qd6 30.Nc6 Qc6 31.Bc2 Nfd7 32.Qa3 Nc8 33.e4 Qd6 (33...Qc7 34.e5=) 34.Qd6 Nd6 35.e5 ½–½. Benassi,Aspasio – Cuniali,Eugenio, CEO06 Asigc, 2002.

4.e3 a5 5.b5 d5=.

4.e3 d5 5.c4 Bd6 6.Nc3 Bb7 7.cd5 Nd5 8.Bb2 0-0 9.Bd3 Nd7 10.Qc2 N5f6 11.Nb5 1–0. jaskier (2130) – chacal (1645), internet, 2007.

4.g3 d5 5.Bg2=.

5.b5 a6+= 6.d3 d5 7.Nbd2 Bb7 (7...ab5 8.cb5 Bd6 9.e4+=) 8.Bb2 (8.ba6 Ra6 9.Bb2 Nc6+=) 8...ab5 9.cb5 Nbd7 10.g3 Be7 11.Bg2 0-0 12.0-0 Ne8 13.e3 Nd6 14.a4 Bf6 15.d4 Re8 (15...Qe7 16.Ne5+=) 16.Ne5 Be5 (16...Nf5 17.Qh5 Be5 18.de5=) 17.de5= Nf5 18.Qh5 (18.e4 de4 19.Ne4 Qc7=) 18...Ra7 19.Nf3 Qe7 20.g4 Nh6 21.Ra3 Rea8 22.Rfa1 f5 (22...c4 23.Nd4+=) 23.ef6 (23.g5!? Nf7 24.g6 hg6 25.Qg6+=) 23...Nf6+= 24.Qh4 Nhg4 25.Bh3 Nh6 (25...h5 26.Bg4 hg4 27.Ne5+=) 26.Bf6 Qf6 27.Qf6 gf6 28.Be6 Kf8 29.e4 (better is 29.Rd1!?+=) 29...de4–+ 30.Nd2 Ke7 31.Bb3 f5 32.Nc4 Rg8 33.Kf1 Rg6 34.a5 ba5 (34...Ng4 35.h4 Nh2 36.Ke2–/+) 35.Na5 (35.b6 Ra8 36.Ra5 Ra5 37.Ra5 Kd8=) 35...Kf8 (35...Kd7 36.Rd1 Kc7 37.Rc1+=) 36.Nc4 (36.Rc1 Ng4 37.Rc5 Nh2 38.Ke2 Rg5+=) 36...Ra3+= 37.Ra3 Ng4 38.Ra7 Bd5 (38...Nh2!? 39.Ke2 Rg7–/+) 39.Rh7= e3 40.h3 Nh2 41.Ke2 ef2 42.Kf2 f4 (better is 42...Rg2 43.Ke1 Nf3 44.Kf1 Rh2–/+) 43.Ne5?? (better is 43.Rh5 Rg2 44.Ke1+=) 43...Rg2–+ 44.Ke1 Bb3 45.b6 Be6 (45...Rg1 46.Kd2 Nf1 47.Kc1 Ne3 48.Kb2+=) 46.b7–/+ Rb2 47.Ng6 (47.Rc7 f3 48.Nd3 Rb1 49.Kd2 Bh3 50.Rc8 Ke7–/+) 47...Kg8–+ 48.b8Q (48.Rc7 f3 49.b8Q Rb8 50.Ne7 Kf8 51.Ng6 Ke8 52.Re7 Kd8 53.Re6 Rb1 54.Kd2–+) 48...Rb8 49.Rh8 Kg7 50.Rb8 Kg6 51.Kf2 Bd5 (51...Bh3!? 52.Rh8 Ng4 53.Kf3–+) 52.Rb5 Nf3 53.Rc5 Be4 54.Rc3 Ne5 55.Ke2 Kf5 56.Rc5 Bd3 57.Kf2 Ke4 58.Rc7 Bb5 59.Re7 Bd7 60.h4 Bg4 61.Re8 Bh5 62.Rh8 Ng4 (62...Bf7 63.Rd8–+) 63.Kg1 Nf6 64.Rf8 Kf5 65.Kf2 Be8 66.Kf3 Bc6 67.Kf2 Ke5 68.Ke1 Ng4 69.h5 f3 70.h6? (better is 70.Kd2–+) 70...Nh6 71.Kf2 Ng4 72.Kg3 Nf6 73.Kf2 Bd5 74.Kg3 Kf5 75.Kf2 Kg5 76.Rd8 Kg4 77.Rf8 Kg5 78.Rd8 Kg4 79.Rf8 Nh5 (79...Nd7!? 80.Re8–+) 80.Ke3 Ng3 (better is 80...Ng7!? 81.Rf4 Kg3–+) 81.Rf4–/+ ½–½. Gurgenidze,Bukhuti – Kachiani Gersinska,K, Tbilisi, 1991. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6)

5.b5 Bb7 6.e3 d5 7.Bb2 Nbd7 8.d3 Bd6 9.Nbd2 e5 10.cd5 Nd5 11.Nc4 Qe7 12.e4 Nf4 13.g3 Ng6 14.h4 0-0-0 15.Bh3 h5 16.a4 Nf4?? (16...Qf6 17.a5 Bc7 18.ab6 ab6 19.Bc1+/–) 17.a5 (17.gf4 ef4 18.a5 Kc7 19.Nd6 Qd6+–) 17...Kc7?? (17...Nh3 18.Rh3 f6 19.Qa4+=) 18.Qc2 (better is 18.gf4 ef4 19.Nd6 Qd6 20.Bg7+–) 18...Ne6? (better is 18...Nh3 19.Rh3 Rhf8+=) 19.Nfe5+– (19.Nce5 Qf6 20.Qc3 Ne5 21.Ne5 Nd4 22.ab6 ab6–/+; worse is 19.Be5 Be5 20.ab6 ab6 21.Nce5 Ne5 22.Ne5 Nd4–+) 19...Ne5 20.Ne5 (worse is 20.Be5 Be5 21.ab6 ab6 22.Ne5 Nd4–+) 20...Nd4 21.Bd4 Be5 22.Be5 Qe5 23.Ke2 Rd4 24.f4 Qe8 25.Ra4 (25.Bg2+/–) 25...Rd6?? (better is 25...Be4!? 26.Rd4 Bh1 27.Kf2 Bc6 28.ab6 ab6+=) 26.Rha1 Qb5 27.Rb1 (27.ab6!? ab6 28.Bf5+/–) 27...Qc6+= 28.ab6 ab6 29.Qc4 Rhd8?? (better is 29...Kd8 30.Ra7 Re8+=) 30.Qf7+– Kb8 (30...R8d7 31.Bd7 Qd7 32.Qd7 Rd7 33.Ke3+–) 31.Rba1 R6d7 32.Bd7 Rd7 (32...Qd7 33.Qb3+–) 33.Qe8 Kc7 34.Rc4 (34.Qh5 Qf6+–) 34...Qb5 35.Qe5 Kc8 36.Rac1 Bc6 37.Ke3 Qb3 38.Qc3 Qa2 39.Qc2 Qa6 40.Qb2 Qb7 (40...Bb5 41.Rd4 Rd4 42.Qd4+–) 41.Rb1 Kc7 42.Qe5 Kc8 43.Rc5! Rc7 (43...bc5 44.Qe8 Double attack (44.Rb7 Pinning; 44.Rb7 Deflection)) 44.Rc4 (44.Rc4 b5 45.Rc5+–) 1–0. Kubien,Jerzy (2250) – Krupa,Monika (2220), Wroclaw–ch Poland, 2004. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6)

5.b5 d5 6.e3 a6 7.d4 ab5 8.cb5 Nbd7 9.Nc3 g6 10.Be2= Bg7 11.Bb2 0-0 12.0-0 Ne4 13.Ne1 cd4 14.ed4 Ndf6 15.f3 Nd6=+ 16.Nc2 Bb7 17.a4 Qd7 18.Re1 Rfc8 19.g4 Nc4–/+ 20.Bc4 dc4 21.h4 Qc7–+ 22.Kg2 Ng4 23.Ne3 Qh2 24.Kf1 Qf2# 0–1. ashleysworld – elcid10, ChessWorld.net, 2009.

5.b5 d5 6.e3 Nbd7 7.Bb2 Bd6 8.d4 0-0 9.Nbd2 Bb7 10.Ne5 (10.cd5 Bd5 11.Rc1 Rc8=) 10...Rc8 11.Be2 Ne4 (11...Qc7!?+=) 12.Ne4= de4 13.Nd7 Qd7 14.dc5 bc5 (14...Rc5 15.Bc3 Rd8 16.Bb4=) 15.Be5 Rfd8 16.Bd6 Qd6 17.Qd6 Rd6 18.Rd1 Rcd8 19.Rd6 Rd6 20.0-0 Kf8 21.Rd1 Ke7 22.Kf1 e5 23.Rd6 Kd6 24.a4 a5 25.g4 g5 26.Kg2 h6 27.Kg3 f6 28.Bf1 Ba8 (28...Bc8 29.h3+=) 29.Be2 Bb7 30.Bd1 Ba8 31.Bc2 Bb7 32.Kg2 Ba8 (32...Bc8 33.Bd1+=) 33.Kf1 Bb7 34.Kg2 Ba8 35.Kh3 Bb7 36.Kg3 Ba8 37.Bb1 Bb7 38.Kg2 (38.h4 Kc7+=) 38...Ba8 (38...Bc8 39.h3 Be6 40.Ba2=) 39.Kh3 (39.h4 Bb7+=) 39...Bb7 40.Kg2 Ba8 ½–½. Skalicka,Carlos – Opsahl,Haakon, Buenos Aires ol (Men), 1939. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6)

5.bc5 bc5 6.Nc3 d5=.

5.bc5 bc5 6.g3 Bb7 7.Bg2 Be7 8.0-0 d6 9.d3 0-0 10.Nc3 Nbd7 11.Rb1 Bc6 12.Qc2 h6 13.Bf4 Qc8 14.Nb5 Ne8 15.h3 a6 16.Nc3 Ra7 17.g4 Qa8 18.Bg3 (18.Rb2 Bf6=) 18...Nef6 19.Kh2 Rb7 (19...Rb8 20.Rb8 Qb8 21.Rb1=) 20.Rb7 Bb7 21.Rb1 Rb8 (21...Re8 22.Qd2=) 22.Nd1 Bc6 23.Rb8 Nb8 24.Qb1 Nbd7 25.Ne3 Qc8 26.Qb2 Qc7 27.Nd2 Nb6 28.Bc6 Qc6 29.Qc3 g6 30.Nf3 Kh7 31.Bf4 Nbd7 32.Kg1 Qb6 33.Qd2 Bf8 34.Qc2 Qc6 35.Qc3 Qb7 36.Bg3 Kg8 37.Nf1 (37.Bh4 Bg7 38.Qa5 Qb6 39.Qb6 Nb6=) 37...Be7 (37...Qc7 38.Qd2=) 38.Bf4 Kh7 39.Qc1 (39.Bc1 d5=) 39...Bf8 40.Qc3 (40.g5 hg5 41.Bg5 Qb3=) 40...Bg7 41.Qc2 (41.Qa5 Qc6=) 41...Qc6 42.Bg3 Nb6 43.Qd2 Bf8 (43...d5 44.Ne5 Qb7 45.cd5 ed5 46.Qa5=) 44.Qf4 (44.Ne3 Qa4 45.Nc2 d5=) 44...Kg7 (44...Nbd7 45.g5 hg5 46.Ng5 Kg8 47.Nh2=) 45.Qd2 (45.Bh4 Nbd7=) 45...Kh7 (45...Nbd7 46.Ne3=) 46.Qa5 Qb7 47.N1d2 Be7 48.Ne1 Nfd7 49.Nef3 Kg8 50.e3 Nf8 (50...d5 51.cd5 ed5 52.Bf4=) 51.Qc3 Nbd7 (51...e5 52.Ne4=) 52.Qc2 (52.Bf4 g5 53.Bg3 Qc6=) 52...Kg7 (52...e5 53.Qb3 Qb3 54.Nb3=) 53.Qc3 (53.Ne4 f5 54.gf5 gf5=) 53...Kg8 (53...Bf6 54.Qb3 Qc6 55.Ne4=) 54.Kf1 (54.Bf4 g5 55.Bg3 Ng6=) 54...e5 55.Qc2 Bd8 56.Ke2 f5 (56...Qc7 57.Qa4=) 57.Kf1 (57.gf5 gf5 58.Bh4 Ba5+=) 57...Ba5= 58.Kg1 (58.gf5 Bd2 59.Nd2 Qh1 60.Ke2 gf5=) 58...fg4 59.hg4 Nf6 60.Ne4 (60.g5 Bd2 61.Nd2 hg5=) 60...Ne4 61.de4 Qd7 ½-½. peonsetima (2420) - dorul (2535), gameknot.com, 2019. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.c4 c5)

5.bc5 Bc5 6.d4 Be7 7.e3 Bb7 8.Bd3 0-0 9.0-0 d5 10.cd5 Bd5 11.Nc3 Bf3 (11...Bb7!?=) 12.Qf3+– (worse 12.gf3 Nc6=) 12...Nbd7 13.Bb2 a6 14.a4 Bb4 15.Rfc1 Bc3 16.Rc3 Nd5 17.Rb3 f5 (17...Qf6!?+–) 18.e4+– fe4 19.Qe4 Qf6 (19...N7f6!? 20.Qe6 Kh8+–) 20.Qh7+– Kf7 21.Qh5 Kg8?? (21...Ke7 22.Ba3 Nc5+–) 22.Bh7 Kh8 23.Bg6 Kg8 24.Qh7 1–0. pcmvr – tomy, net–chess.com, 2020.

5.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3).

5.Nc3 A) 5...Be7 A1) 6.Be2 c5 (6...0-0 7.Bb2 c5 8.bc5 Bc5 9.0-0 d5=; 6...a5 7.b5 0-0 8.Bb2 d6 9.0-0 c5=) 7.bc5 Bc5 8.Bb2 0-0 9.0-0 d5=; A2) 6.Bd3 c5 (6...0-0 7.Bb2 c5 8.bc5 Bc5 9.0-0 d5=; 6...a6 7.0-0 0-0 8.Bb2 Nc6 9.e4 d6=) 7.bc5 Bc5 8.Bb2 0-0 9.0-0 d5=; A3) 6.Bc4 d5 (6...c6 7.0-0 d5 8.Be2 0-0 9.Bb2 a5=; 6...0-0 7.0-0 d5 8.Be2 Nbd7 9.Bb2 a5=) 7.Be2 0-0 8.0-0 Nbd7 9.Rb1 e5=; A4) 6.Bb2 a5 (6...c5 7.bc5 Bc5 8.Be2 0-0 9.0-0 d5=; 6...0-0 7.Be2 c5 8.bc5 Bc5 9.0-0 d5=) 7.b5 a4 8.Bc4 0-0 9.0-0 c5=; B) 5...a5 6.b5 c5 (6...d5 7.d4 Bd6 8.Bd3 0-0 9.0-0 Nbd7=; 6...Be7 7.Bb2 0-0 8.Be2 Re8 9.0-0 d6=) 7.Be2 d5 8.0-0 Bd6 9.d4 c4=; C) 5...c5 C1) 6.bc5 Bc5 7.d4 Be7 8.Bd3 0-0 9.0-0 d5=; C2) 6.b5 d5 (6...a6 7.Bb2 d5 8.ba6 Ba6 9.Ba6 Ra6=; 6...Be7 7.Be2 0-0 8.Bb2 a6 9.0-0 d5=) 7.Bb2 Bd6 8.Be2 0-0 9.0-0 e5+=; C3) 6.Na2 cb4 (6...a6 7.d4 cb4 8.Nb4 Be7 9.Bd3 0-0=; 6...d5 7.Bb2 a6 8.Be2 Nc6 9.Rb1 c4=) 7.ab4 Be7 8.Be2 0-0 9.Bb2 Qc7=; C4) 6.Rb1 d5 (6...cb4 7.ab4 a6 8.Bd3 Be7 9.0-0 0-0=; 6...Qc8 7.Be2 cb4 8.ab4 Be7 9.0-0 0-0=) 7.d4 cb4 8.ab4 a6 9.b5 a5=.

5.c4 c5 6.b5 a6 7.Bb2 ab5 8.cb5 d5 9.Be2 Nbd7 10.0-0 Bd6 11.d4 Qc7 12.h3 (12.dc5 Nc5 13.Bf6 gf6=) 12...e5 13.de5 Ne5 14.Nbd2 0-0 15.Ne5 Be5 16.Be5 Qe5 17.Nf3 (17.Qc2 Rfe8+=) 17...Qe7 18.Qc2 Ne4 19.Rfe1 f5 20.Qb2 Rae8 21.a4 f4 22.ef4 Rf4 23.a5 ba5 24.Ra5 Ng5 25.Ng5 Qg5 26.Qc1 c4 27.Ra7 Bc8 28.Bg4 (better is 28.Ra8!? Rf5 29.Bf3 Qc1 30.Rc1+/–) 28...Re1–/+ 29.Qe1 Re4 30.Qd1 Bg4 (30...Rg4 31.hg4 Bg4 32.f4 Bd1 33.fg5+–) 31.hg4 c3 (31...Rg4!? 32.Ra8 Kf7–/+) 32.Ra8= Kf7 33.Qf3 Qf6 34.Ra7 Kg8 35.Ra8 Kf7 36.Qd3?? (better is 36.Ra7 Ke8 37.Ra8 Kd7 38.Ra7 Kc8 39.Qd1=) 36...Re1–+ 37.Kh2 Qf4 38.Qg3 Qh6 39.Qh3 Qh3 40.Kh3 c2 41.Ra7 Ke6 42.Ra6 Ke5 43.Ra4 (43.Rc6 c1Q 44.Rc1 Rc1 45.Kg3–+) 43...c1Q 44.Rb4 Rh1 45.Kg3 0–1. Luneau,Gilles – Marin, Andorra, 1995. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.e3 Bb7)

5.c4 c5 6.bc5 bc5 7.Nc3 Nc6 8.d4 d5 9.Rb1 Rb8 10.Qa4 Qa5 (10...Qd7 11.cd5 Nd5 12.Nd5 ed5 13.Bb5+/–) 11.Qa5 (11.cd5 Qa4 12.Na4 Nd5 13.Nc5 Bc5 14.dc5 Nc3+/–) 11...Na5 12.cd5 ed5 13.Bb5 (13.Rb5!? Nc6 14.dc5+=) 13...Bc6+= 14.Ne5 Bb5 15.Nb5 Rb6 16.Bd2 Nc4 17.Nc4 dc4 18.Ba5 Rc6 19.Nc7 Kd7 20.Rb7 Kc8 21.Ra7 cd4 22.ed4 Kb8? (better is 22...c3!? 23.Nb5 c2+=) 23.Nb5+– Re6 (23...Ne8 24.Rf7 Ra6 25.Bd2 Ba3 26.Na3 Ra3 27.Ke2+–) 24.Kd1 Nd5 (24...Ne4 25.Rf7 Re7 26.Re7 Be7 27.Re1 Nf2 28.Kc2+–) 25.Rd7 Ne7 (25...Ra6 26.Bd2 Nf6 27.Rf7 Ba3 28.Rg7+– (28.Na3 Ra3 29.Re1 Ra1 30.Kc2 Ra2 31.Kc3 Nd5 32.Kc4 Rd2 33.Rb1 Kc8+–)) 26.d5 Rf6 27.Rd8 Nc8 (27...Kb7 28.Nd6 Rd6 29.Rd6+–) 28.Re1 (better is 28.d6 Bd6 29.Rh8 Bc5 30.Rh7 Rf2 31.Rg7 Rb2+–) 28...Kb7 29.Ree8 Ka6 30.Bc3 (30.Rf8?! Rf8 31.Rf8 Ka5+/–) 30...Rf2 31.Rc8 (better is 31.Nc7!? Kb7 32.Rc8 Bb4 33.Rh8 Bc3+–) 31...Kb5 32.Rf8 (32.d6!? Bd6 33.Rh8 Rg2 34.Rh7 f6+–) 32...Rf8 33.Rf8 Rg2 (33...Kc5 34.Rh8+–) 34.Rf7 (34.d6 Rg1 35.Ke2 Kc6+–) 34...Rh2 35.Rg7 Rh5 (35...Kc5 36.Rg5 h6 37.Rf5 Rh1 38.Ke2 Rh2 39.Ke1 Rh1 40.Kf2 Rh2 41.Kg3+–) 36.Rb7 Kc5 (36...Ka6 37.Rc7 Rd5 38.Kc2 Kb5 39.Rh7 Rc5+–) 37.Bb4 Kd4 38.d6 1–0. Heinola,K – Ojanen,K, Vammala, 1984.

5.c4 c5 6.bc5 bc5 7.Be2 Be7 8.0-0 0-0 9.Qc2 Nc6 10.Bb2 Qc7 11.Nc3 a6 12.Ng5 g6 13.Nce4 Ne4 14.Ne4 f5 15.Nc3 Bf6 16.Rab1 Ne7 17.Rfc1 Bc6 18.h3 f4 19.Ne4 Bb2 20.Rb2 Qe5 21.Bf3 Nf5 22.Qc3 Qc3 23.Rc3 (worse is 23.Nc3 Bf3 24.gf3 Rab8+=) 23...fe3 24.de3 Nh4 25.Nc5 Nf3 26.gf3 Rf3 27.Rcb3 (27.Kh2 Raf8+=) 27...Raf8 (better is 27...Rh3!? 28.f4 g5 29.fg5 Rg3 30.Kf1 Rg5 31.Rb8 Rb8 32.Rb8 Kf7 33.Na6 Ra5–/+) 28.e4= R8f4 29.Na6 Rb3 30.Rb3 Re4 31.Rc3 h5 32.Nb8 Ba4 33.c5 Re1 34.Kh2 Rb1 35.Rc4 Bb5 36.Rd4 Attacking the backward pawn on d7 36...g5 37.Nd7 Kg7 38.Ne5 (better is 38.Nb8!? Rc1 39.a4+/–) 38...Kf6= 39.Re4 Rc1 40.c6 Bc6 41.Nc6 Rc6 42.Ra4 Rc2 43.Kg2 e5 ½–½. Saradjen,Janko (2145) – Illijin,Neboisa (2275), Bled op Seniors, 2008. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.e3 Bb7)

5.c4 d5 6.Bb2 Be7 7.Be2 0-0 8.0-0 Nbd7 9.d4 dc4 10.Bc4 c5 11.dc5 bc5 12.b5 a6 13.ba6 Ba6 14.Nbd2 Nb6 15.Qe2 Nc4 16.Nc4 Qd5 17.Rfc1 Rfb8 18.Be5 Bc4 19.Qc4 Qc4 20.Rc4 Ra3 21.Rac1 Rba8 22.Bf6 gf6 23.Kf1 Ra1 24.Ke2 R8a2 25.R1c2 Kf8 26.Nd2 Ke8 27.Nb3 Rc2 28.Rc2 Ra7 29.Kd3 Rc7 30.Kc4 Kd7 31.Ra2 Kc6 32.Ra8 f5 33.Na5 Kb6 34.Nb3 h5 35.Rb8 Kc6 36.Na5 Kd7 37.Ra8 h4 38.Ra6 Bd6 39.g3 hg3 40.hg3 Ke7 41.Ra8 Kf6 42.Ra6 Bf8 43.Ra8 Be7 44.Kd3 Rd7 45.Ke2 Rd8 46.Ra7 Rb8 47.Nc4 Rb3 48.f4 Rc3 49.Ne5 c4 50.Kd2 Rb3 51.Nc4 Bb4 52.Ke2 Rc3 53.Rc7 Kg7 54.Rc6 Rc2 55.Kf1 Rc1 56.Ke2 Be1 57.Kf3 Rc2 58.g4 Rf2 59.Kg3 Rf1 60.Kg2 Rf2 0–1. Susnjar – Ascic, Tucepi 1996.

5.c4 d5 6.d4 c5 (better is 6...dc4 7.Bc4 Bd6=) 7.Nc3 (better is 7.cd5!? Bd5 8.Nc3=) 7...cb4–/+ 8.ab4 (8.Nb1 a6–/+) 8...Bb4 9.Qa4 Nc6 10.Bd2 0-0 (10...dc4 11.Bc4 a6 12.Bd3–/+) 11.Ne5 (11.cd5 Nd5 12.Nd5 Bd2 13.Nd2 Qd5–/+) 11...Bc3 12.Bc3 Qc7 (12...Ne5 13.de5 Ne4 14.Bd4–/+) 13.Rc1 (13.Nf3 Rfc8–/+) 13...Ne5 14.de5 Nd7 (14...Ne4 15.Bd4–/+) 15.Bb4 (15.cd5!? Bd5 16.Bb2–/+) 15...Nc5–+ 16.Qa3 (16.Qc2 dc4 17.Qc4 Qe5–+) 16...Rfc8 17.Be2 (17.Qb2 Ba6–+) 17...dc4 (17...a5 18.Bc3 dc4 19.Bc4 Bg2 20.Rg1–+) 18.0-0 a5 (18...b5 19.Bc4 a5 20.Bc5–+) 19.Bc5 Qc5 (worse is 19...bc5 20.f4–/+) 20.Qc5 Rc5 21.Rc4 Rc4 22.Bc4 a4 23.Rb1 a3 24.Kf1 Bd5 (24...Kf8 25.Bd3–+) 25.Bd5 ed5 26.Ke2 Kf8 27.Kd3 Ke7 28.Kc3 a2 29.Ra1 Ke6 30.Kb4 (30.f4 Ra3 31.Kb4 Re3 32.Ra2 Re4 33.Kb5 Rf4 34.Kb6 Ke5–+) 30...Ke5 31.Kb5 (31.f3 f5–+) 31...d4 (better is 31...Ke4 32.h3–+) 32.Kb6 (32.ed4 Kd4 33.Kb4–+) 32...d3 33.Kb7 Ra3 34.Kc6 d2 35.Kc5 (35.f4 Ke4 36.g3–+) 35...Rc3 36.Kb4 Rc1 37.Ra2 d1Q (37...d1Q 38.Rb2 Qd6 39.Ka4 Qa6 40.Kb3 Qc4 41.Ka3 Ra1 42.Ra2 Ra2) 0–1. Khazeev,Igliz M (2185) – Rozum,Ivan (2535), 36. Nezhmetdinov Rapid, 2014. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.e3 Bb7)

5.c4 d5 6.cd5 Nd5 7.d4 a5=.

5.c4 Bd6 6.d4 Nc6 7.Nbd2 0-0 8.Qc2 a5 (8...h5!?=) 9.b5+= Na7 10.Bd3 Be7 11.0-0 d6 12.a4 c6 13.Ba3 Rc8 14.Qb3 Qc7 15.h3 Rfd8 16.Rac1 c5 17.Bb1 Qb8 18.dc5 dc5 19.Qc2 g6 20.Bb2 Qa8 (20...Rc7 21.Qc3+/-) 21.Qc3+/- h6 (better 21...Rc7!?+/-) 22.e4!+- Kf8 (22...Be4 23.Ne4 Decoy; 22...Ne4 23.Qg7 Mate attack) 23.Qe3 Ng8 24.Bh8 Ke8 25.Ne5 Bd6 26.Ndf3 Rc7 (26...g5 27.Qc3 Rc7 28.Rfe1+-) 27.Rcd1 Bf8 (27...g5 28.Ng5! Be5 29.Be5+-) 28.Qf4 Qc8 (28...Rd6 29.Ng6! Qd8 30.Rd6 Bd6 31.Nge5+-) 29.Qg3 g5 (29...Ne7 30.Bf6+-) 30.Qg4 Rd6 (30...Be7 31.Qh5 Bd6 32.h4+-) 31.Rd6 Bd6 32.Rd1 Qd8 (32...Be5 33.Ne5 (33.Be5?! Rd7 34.Re1 Qd8+-) 33...Kf8 34.Qf3+-) 33.Nf7! Rf7 (33...Rf7 34.Qe6 Double attack; 33...Kf7 34.e5 Combination) 34.e5 Bf3 (34...Kf8 35.Qe6 Qe7 36.Qd6 Qd6 37.Rd6+-) 35.gf3 Ke7 (35...Qc8 36.Rd6 Kf8+-) 36.Rd6 Qc8 37.Rb6 Kf8 (37...Kd8 38.Re6 Kc7 39.b6 Kb8 40.Be4+-) 38.Be4 1-0. jon_lord (2225) - extremo (2140), gameknot.com, 2021.

5.Bc4 A) 5...a5 6.b5 c5 (6...d5 7.Be2 Bd6 8.Bb2 0-0 9.0-0 Nbd7=; 6...c6 7.0-0 d5 8.Be2 Bd6 9.Bb2 0-0=) 7.d4 d5 8.Be2 Nbd7 9.Nbd2 Bd6+=; B) 5...Be7 B1) 6.0-0 0-0 (6...d5 7.Be2 0-0 8.Bb2 Nbd7 9.b5 a6=; 6...a6 7.d4 0-0 8.Bd3 Ne4 9.Bb2 f5=) 7.Bb2 d5 8.Be2 Nbd7 9.Nc3 c5+=; B2) 6.Bb2 d5 (6...0-0 7.0-0 d5 8.Be2 Nbd7 9.Nc3 c5=; 6...c5 7.bc5 bc5 8.0-0 0-0 9.Nc3 d5+=) 7.Be2 0-0 8.0-0 c5 9.b5 a6+=; B3) 6.Nc3 c6 (6...0-0 7.0-0 d5 8.Be2 a5 9.b5 c5=; 6...d5 7.Be2 0-0 8.0-0 a5 9.b5 c5=) 7.0-0 d5 8.Bd3 0-0 9.Bb2 Nbd7=; B4) 6.d4 0-0 (6...a5 7.b5 0-0 8.0-0 c6 9.Nc3 cb5=; 6...Ne4 7.0-0 0-0 8.Bb2 d5 9.Bd3 c5=) 7.Nbd2 a5 8.b5 c6 9.0-0 Qc7=; C) 5...c5 C1) 6.b5 Be7 (6...a6 7.ba6 Ba6 8.Ba6 Na6 9.0-0 d5=; 6...d5 7.Be2 Bd6 8.d4 c4 9.a4 a6+=) 7.0-0 0-0 8.d4 d5 9.Be2 Nbd7+=; C2) 6.c3 d5 (6...Be7 7.d4 d5 8.Bd3 0-0 9.0-0 c4=; 6...Nc6 7.d4 d5 8.Bd3 c4 9.Bc2 Bd6=) 7.Bb5 Nbd7 8.d4 a6 9.Bd3 c4+=; C3) 6.bc5 Qc7 (6...bc5 7.Nc3 Nc6 8.Rb1 Rb8 9.Bb5 a6=; 6...Bc5 7.d4 Be7 8.0-0 0-0 9.Nbd2 Qc7=) 7.Bb2 Qc5 8.Bf6 Qc4 9.Bb2 Be7+=; D) 5...a6 D1) 6.0-0 d5 (6...c5 7.bc5 Bc5 8.d4 Be7 9.Bd3 0-0=; 6...Be7 7.d4 0-0 8.Bd3 a5 9.b5 c6=) 7.Be2 Bd6 8.d4 Nbd7 9.Nbd2 0-0=; D2) 6.Be2 c5 (6...Be7 7.0-0 0-0 8.Bb2 Nc6 9.Nc3 e5=; 6...Bd6 7.0-0 0-0 8.Nc3 c5 9.bc5 Bc5=) 7.bc5 Bc5 8.0-0 d5 9.d4 Bd6=; D3) 6.Bb2 d5 (6...c5 7.bc5 Bc5 8.d4 Be7 9.0-0 0-0=; 6...Be7 7.0-0 0-0 8.Nc3 d5 9.Be2 Nbd7=) 7.Be2 Bd6 8.0-0 0-0 9.Be5 c5=; D4) 6.d4 a5 (6...Be7 7.0-0 0-0 8.Bd3 c5 9.bc5 bc5=; 6...Bd6 7.0-0 0-0 8.Nc3 b5 9.Bd3 Qe7=) 7.b5 Be7 8.0-0 0-0 9.Bd3 c6=; E) 5...d5 6.Be2 c5 (6...Bd6 7.0-0 0-0 8.Bb2 Nbd7 9.Nc3 a6=; 6...a5 7.b5 Bd6 8.0-0 c5 9.bc6 Nc6=) 7.bc5 Bc5 8.Bb2 Nc6 9.0-0 0-0+=.

5.d3 A) 5...Be7 A1) 6.Nc3 0-0 (6...d6 7.Be2 0-0 8.e4 c5 9.bc5 dc5=; 6...a5 7.b5 0-0 8.Be2 d5 9.d4 c5=) 7.Bb2 c5 8.bc5 bc5 9.Rb1 Nc6=; A2) 6.e4 0-0 (6...d6 7.Be2 a5 8.b5 c6 9.Nc3 0-0=; 6...d5 7.e5 Nfd7 8.Be2 c5 9.c3 0-0=) 7.Be2 d5 8.e5 Nfd7 9.0-0 c5=; A3) 6.d4 0-0 (6...a5 7.b5 0-0 8.Bd3 Ne4 9.0-0 Qe8=; 6...Ne4 7.Bd3 0-0 8.0-0 c5 9.bc5 bc5=) 7.Bd3 c5 8.bc5 bc5 9.Nbd2 Nc6=; A4) 6.Be2 0-0 (6...a5 7.b5 c6 8.Nc3 0-0 9.e4 d6=; 6...c5 7.bc5 Bc5 8.e4 e5 9.c3 Qc7=) 7.e4 d6 8.0-0 c5 9.Nbd2 Nbd7=; B) 5...a5 B1) 6.ba5 Ra5 (6...Bf3 7.Qf3 Ra5 8.Bb2 d5 9.Bc3 Ra4=) 7.e4 Be7 8.Bd2 Ra7 9.e5 Nd5=; B2) 6.b5 d5 (6...Be7 7.Be2 c6 8.Nc3 0-0 9.e4 d6=; 6...c6 7.Nc3 d5 8.Bb2 Bd6 9.e4 Be7=) 7.d4 Bd6 8.Be2 0-0 9.0-0 c6=; C) 5...Bd6 C1) 6.Be2 0-0 (6...c5 7.e4 Qc7 8.bc5 Bc5 9.Bb2 Be7=; 6...a5 7.b5 Qe7 8.e4 e5 9.Nbd2 Bc5+=) 7.e4 Ng4 8.h3 Ne5 9.Ne5 Be5=; C2) 6.Nc3 c5 (6...0-0 7.e4 Be7 8.Be2 c5 9.bc5 Bc5=; 6...a6 7.e4 a5 8.b5 0-0 9.Be2 Be7+=) 7.bc5 Bc5 8.e4 0-0 9.d4 Be7=; C3) 6.c3 0-0 (6...Nc6 7.Be2 0-0 8.e4 a6 9.0-0 b5+=; 6...a5 7.e4 Nc6 8.b5 Na7 9.Be2 Nb5+=) 7.e4 Be7 8.Be2 d6 9.0-0 a5=; C4) 6.e4 0-0 7.e5 Bf3 8.Qf3 Be5 9.d4 Bd4=; D) 5...d5 D1) 6.d4 c5 (6...a5 7.b5 Bd6 8.Bd3 c5 9.bc6 Nc6=; 6...Bd6 7.Bd3 0-0 8.0-0 a5 9.b5 c5=) 7.Bb5 Nc6 8.c4 a6 9.Bc6 Bc6+=; D2) 6.Nc3 Bd6 (6...a5 7.b5 Bd6 8.d4 0-0 9.Bd3 Ne4+=; 6...c5 7.bc5 Bc5 8.d4 Be7 9.Bd3 0-0=) 7.Be2 a5 8.ba5 Ra5 9.Nd4 0-0+=; D3) 6.Bb2 c5 (6...Bd6 7.Nc3 a5 8.b5 0-0 9.Be2 e5=; 6...a6 7.d4 c5 8.dc5 bc5 9.bc5 Bc5=) 7.bc5 Bc5 8.Be5 0-0 9.d4 Be7=; D4) 6.Be2 c5 (6...Bd6 7.0-0 0-0 8.Nc3 a5 9.b5 e5=; 6...a6 7.0-0 Bd6 8.Bb2 0-0 9.Nbd2 Nbd7=) 7.Bd2 Bd6 8.0-0 0-0 9.bc5 bc5=.

5.Bd3 A) 5...a6 A1) 6.0-0 c5 (6...Be7 7.Bb2 0-0 8.Nc3 Nc6 9.e4 d6=; 6...Bd6 7.Bb2 0-0 8.Nc3 a5 9.b5 a4=) 7.bc5 Bc5 8.Nc3 b5 9.Be2 Qc7+=; A2) 6.Bb2 c5 (6...Be7 7.0-0 0-0 8.Nc3 Nc6 9.e4 d6=; 6...Bd6 7.0-0 0-0 8.Nc3 e5 9.Bf5 e4=) 7.bc5 Bc5 8.Nc3 b5 9.0-0 0-0=; A3) 6.Be2 c5 (6...d5 7.0-0 Bd6 8.d4 c5 9.bc5 bc5=; 6...Be7 7.Bb2 0-0 8.0-0 d5 9.d4 c5=) 7.bc5 Bc5 8.d4 Be7 9.0-0 0-0=; A4) 6.Nc3 c5 (6...Be7 7.Bb2 0-0 8.0-0 Nc6 9.e4 d6=; 6...Bd6 7.0-0 0-0 8.Bb2 a5 9.b5 a4=) 7.bc5 Bc5 8.Bb2 d6 9.Rb1 b5=; B) 5...a5 6.b5 Ne4 (6...Be7 7.0-0 0-0 8.Bb2 Ne4 9.Be4 Be4=; 6...Bc5 7.0-0 0-0 8.Bb2 a4 9.Be2 Ne4=) 7.Bb2 Be7 8.Nc3 Nc3 9.Bc3 0-0=; C) 5...Be7 C1) 6.0-0 0-0 (6...a6 7.Nc3 d6 8.e4 0-0 9.Bb2 c5=; 6...d5 7.Bb2 0-0 8.Ne5 c5 9.bc5 bc5=) 7.Nc3 d5 8.Bb2 Nbd7 9.Rb1 c5=; C2) 6.Bb2 0-0 (6...c5 7.bc5 Bc5 8.0-0 0-0 9.Ng5 h6=; 6...a5 7.b5 0-0 8.0-0 Ne4 9.Be4 Be4=) 7.0-0 c5 8.bc5 Bc5 9.Ng5 h6=; D) 5...Bd6 D1) 6.0-0 c5 (6...0-0 7.Bb2 c5 8.bc5 Bc5 9.Ng5 h6=; 6...a5 7.b5 e5 8.Bc4 e4 9.Ng5 0-0=) 7.bc5 Bc5 8.Bb2 0-0 9.Ng5 h6=; D2) 6.Bb2 0-0 (6...c5 7.b5 0-0 8.Nc3 a6 9.0-0 ab5=; 6...a5 7.b5 0-0 8.0-0 Qe7 9.Nc3 e5=) 7.0-0 c5 8.bc5 Bc5 9.Nc3 d5=; D3) 6.Nc3 0-0 (6...e5 7.Bf5 e4 8.Nd4 c5 9.bc5 Bc5=; 6...a5 7.b5 e5 8.e4 0-0 9.0-0 Qe7=) 7.0-0 e5 8.Bf5 e4 9.Nd4 Be5=; E) 5...c5 E1) 6.b5 d5 (6...a6 7.Bb2 d5 8.Nc3 Be7 9.0-0 0-0+=; 6...Be7 7.0-0 d5 8.Nc3 0-0 9.Bb2 a6+=) 7.Bb2 Bd6 8.0-0 0-0 9.Be5 Be5+=; E2) 6.c3 d5 (6...Bd6 7.Be2 0-0 8.d3 Qc7 9.e4 c4=; 6...Be7 7.0-0 0-0 8.Be2 d5 9.d4 c4=) 7.0-0 Bd6 8.Bb5 Nc6 9.d4 a6+=; E3) 6.bc5 Bc5 (6...bc5 7.Nc3 Nc6 8.Rb1 Rb8 9.Bb2 d5=) 7.Bb2 0-0 8.0-0 Nc6 9.Nc3 d5=.

5.d4 a5 6.b5 (6.ba5 Ra5 7.Bd3 Nc6 8.Bb2 Be7 9.0-0 0-0=) 6...Bd6 (6...Ne4 7.Bd3 Qf6 8.c4 Nc5 9.Bc2 Ne4+=; 6...Be7 7.Bd3 Ra7 8.0-0 0-0 9.c4 c5+=) 7.Nbd2 0-0 8.Bd3 c6 9.bc6 dc6=.

5.d4 Bd6 A) 6.Nbd2 Be7 (6...0-0 7.Bd3 a5 8.b5 c6 9.bc6 dc6=; 6...a5 7.b5 Be7 8.Bd3 0-0 9.0-0 d5=) 7.Bd3 0-0 8.0-0 a5 9.ba5 Ra5=; B) 6.c4 0-0 (6...a5 7.b5 0-0 8.Bd3 Ne4 9.0-0 f5=; 6...Ne4 7.Bd3 a5 8.c5 Be7 9.Ne5 Nf6=) 7.Bd3 a5 8.b5 Qe7 9.Bb2 Ne4=; C) 6.Bd3 Ne4 (6...a5 7.b5 Qe7 8.Nc3 e5 9.de5 Be5+=; 6...0-0 7.Nbd2 a5 8.ba5 Ra5 9.0-0 Be7=) 7.Be4 Be4 8.Nbd2 Bb7 9.e4 0-0=.

5.d4 Ne4 A) 6.Bd3 Bd6 (6...a5 7.b5 Be7 8.0-0 0-0 9.c4 f5=; 6...f5 7.Ne5 Qf6 8.0-0 d6 9.Nc4 d5=) 7.0-0 0-0 8.Be4 Be4 9.Nc3 Bb7=; B) 6.Nfd2 Nd6 (6...Nd2 7.Nd2 a5 8.b5 Qf6 9.Qg4 h5=; 6...a5 7.Ne4 Be4 8.b5 Bb7 9.Nd2 Qf6=) 7.c4 a5 8.b5 Qf6 9.Qg4 h5=; C) 6.Be2 Be7 (6...Bd6 7.0-0 Qf6 8.Qd3 a5 9.Nbd2 Qg6=; 6...a5 7.b5 Qf6 8.0-0 Bd6 9.Qd3 0-0=) 7.0-0 a5 8.b5 f5 9.Ne5 0-0=; D) 6.Bb2 Bd6 (6...Be7 7.Bd3 a5 8.b5 f5 9.c4 0-0=; 6...a5 7.b5 Qf6 8.Nc3 Nc3 9.Bc3 Be7=) 7.Bd3 a5 8.b5 0-0 9.0-0 f5=.

5.d4 Be7 A) 6.c4 a5 (6...0-0 7.Bd3 a5 8.b5 c5 9.0-0 cd4=; 6...Ne4 7.Bd3 a5 8.b5 f5 9.0-0 0-0=) 7.b5 c5 8.Bd3 cd4 9.Nd4 d5=; B) 6.Nbd2 a5 (6...0-0 7.Bd3 a5 8.b5 c6 9.c4 d5=; 6...d5 7.Bd3 0-0 8.0-0 a5 9.b5 c6=) 7.b5 c6 8.Rb1 0-0 9.bc6 dc6=; C) 6.Bc4 a5 (6...0-0 7.0-0 c5 8.bc5 bc5 9.Nbd2 d5=; 6...Ne4 7.0-0 0-0 8.Nfd2 f5 9.Ne4 fe4=) 7.b5 Ne4 8.0-0 0-0 9.Bd3 f5=; D) 6.Bd3 a5 (6...0-0 7.0-0 a5 8.b5 c6 9.c4 cb5=; 6...Be4 7.0-0 0-0 8.c4 c5 9.bc5 bc5+=) 7.b5 0-0 8.0-0 Ne4 9.c4 f5=.

5.Be2 a5 6.b5 Be7 (6...Bc5 7.0-0 0-0 8.Bb2 c6 9.Nc3 d5=; 6...a4 7.Bb2 Be7 8.c4 Ne4 9.d3 Bf6=) 7.Bb2 0-0 8.Nc3 d6 9.0-0 c5=.

5.Be2 c5 6.bc5 (6.b5 d5 (6...a6 7.Bb2 Be7 8.0-0 0-0 9.ba6 Na6=; 6...Be7 7.Bb2 a6 8.ba6 Na6 9.0-0 0-0=) 7.0-0 Bd6 8.Nc3 0-0 9.Bb2 e5+=; 6.c3 d5 (6...Be7 7.bc5 bc5 8.d3 0-0 9.0-0 Nc6=; 6...cb4 7.ab4 a5 8.ba5 Ra5 9.Ra5 ba5=) 7.0-0 Bd6 8.d4 0-0 9.Nbd2 c4+=) 6...bc5 (6...Bc5 7.0-0= 0-0 8.d4 Be7 9.Nbd2 Qc7=) 7.c4 (7.Nc3 Nc6 8.Rb1 Rb8 9.Bb2 d5=) 7...Nc6 8.0-0 g6 (8...Rb8 9.d4= d5=) 9.Bb2 (9.d4 Bg7+=; 9.Nc3 Bg7+=) 9...Bg7= 10.Nc3 0-0 11.Qc2 a6 12.Rab1 Qc7 (12...Rb8 13.Rfe1=) 13.h3 (13.Ne4 Ne4 14.Bg7 Kg7 15.Qe4 Rab8+=) 13...Ne7 14.d3 d6 15.Rfe1 (15.Ne4 Be4 16.de4 Nc6=) 15...h5 (15...Rab8 16.Rec1=) 16.e4 (16.Ne4 Be4 17.de4 Nc6+=) 16...Nd7 17.Rbd1 (17.Qd2 f5+=) 17...Nc6 18.Bf1 (18.Qd2 Nde5=) 18...Nde5 19.Ne5 Nd4 20.Qb1 Be5 21.Kh1 (21.Ne2!?=) 21...f5–/+ 22.Kg1 (22.Ne2!?–/+) 22...Qf7–+ 23.Be2 (better is 23.Ne2 fe4 24.Kh1–+) 23...fe4 24.Rf1 Qf4 (24...Ne2?! 25.Ne2 ed3 26.Rd3–+) 25.g3 Qf5 26.Kh2 Ne2 27.Ne2 Qf3 28.Ng1 (28.Be5 ed3 29.Nf4 Rf4 30.Qb7 Qb7 31.Bf4–+) 28...Qf2! 29.Rf2 (29.Rf2 Rf2) 29...Rf2 30.Kh1 e3 (30...Bb2?! 31.de4 h4 A) 32.Rd6?? hg3 33.Nf3 g2 (33...Rf3?! 34.Qb2 Rf1 35.Kg2 Rf2 36.Qf2 gf2 37.Kf2–+) 34.Kh2 Be5 (34...Rf3?! 35.Qb2 Be4 36.Qg2=) 35.Ne5 Rf1 36.Kg2 Rb1–+; B) 32.gh4–/+; 30...Bg3 31.Nf3 e3 32.Kg1 Bf3 33.Be5 Rg2 34.Kh1 Rh2 35.Kg1 Rh1) 31.Nf3 Bf3 32.Kg1 Rg2 33.Kf1 (33.Kh1 Rg3 34.Kh2 Rg2 35.Kh1 Rg4) 33...Rh2 (33...Rh2 34.Be5 Rh1) 0–1. Smith,Tony – Mackellar,Laurie, BCCA Trophies 4B, 2002.

5.Be2 d5 A) 6.0-0 c5 (6...Bd6 7.Bb2 0-0 8.Be5 a5 9.Bd6 Qd6=; 6...a5 7.b5 Bd6 8.Bb2 0-0 9.Be5 Be5=) 7.c3 Bd6 8.d4 0-0 9.Nbd2 c4+=; B) 6.Nc3 a5 (6...c5 7.Rb1 cb4 8.ab4 Be7 9.0-0 0-0=; 6...Bd6 7.Nb5 Be7 8.Bb2 Nbd7 9.0-0 0-0=) 7.b5 Bd6 8.0-0 0-0 9.d4 Nbd7=; C) 6.Bb2 c5 (6...Bd6 7.Nc3 0-0 8.Nb5 Be7 9.Be5 Ne8=; 6...a5 7.b5 Bd6 8.0-0 0-0 9.Be5 Be5=) 7.Ne5 a6 8.Bc3 Bd6 9.bc5 bc5=; D) 6.d4 Bd6 (6...Be7 7.0-0 0-0 8.Nbd2 a5 9.b5 c6=; 6...a6 7.Nbd2 Bd6 8.0-0 0-0 9.c4 c5=) 7.0-0 a5 8.b5 0-0 9.c4 dc4=.

5.Be2 Bd6 A) 6.Bb2 a5 (6...c5 7.bc5 Bc5 8.0-0 0-0 9.d4 Be7=; 6...0-0 7.Nc3 Be7 8.0-0 a6 9.Ra2 a5=) 7.b5 0-0 8.0-0 Qe7 9.Ne5 Be5=; B) 6.Nc3 0-0 (6...c5 7.Nb5 Be7 8.bc5 Bc5 9.Bb2 a6=; 6...a5 7.b5 0-0 8.0-0 e5 9.d3 a4=) 7.Bb2 Be7 8.0-0 a6 9.d3 d5=; C) 6.0-0 a5 (6...0-0 7.Bb2 c5 8.bc5 Bc5 9.Nc3 d5=; 6...Qe7 7.Bb2 a5 8.b5 0-0 9.d3 c6=) 7.b5 0-0 8.Bb2 Qe7 9.d3 c6=.

5.Be2 Be7 6.0-0 0-0 7.Bb2 d5 8.Nc3 Nbd7 9.d4 c5=.

5.Be2 Be7 6.0-0 0-0 7.c4 d5 8.cd5 Nd5 9.Bb2 Nd7 10.d3 c5 11.bc5 Nc5 12.Nbd2 Nf6 13.Nc4 Rc8 14.d4 Nce4 15.Rc1 (15.Nce5 Bd5=) 15...Qd5 16.Qd3 Rfd8 17.Nce5 Bd6 18.Qb5 Be7 (18...Rc1 19.Rc1 (worse is 19.Bc1 Nc3 20.Qd3 Rc8–/+) 19...Be5 20.de5 Qb5 21.Bb5+=) 19.a4 (19.Qa4 Rc1 20.Rc1 Qa2=) 19...h6 (19...Nd6 20.Qd3=) 20.Bc4 Qd6 21.Qb3 Nd5 22.Qd3 (22.a5 Qb4 23.Qb4 Nb4 24.ab6 ab6=) 22...Ndf6 23.Ra1 Qb8 24.Rfc1 Bd6 25.Qb3 (25.a5 ba5 26.Rcb1 Ng5=) 25...Bd5 (better is 25...Be5!? 26.Ne5 Nd2=) 26.Bd5+= Nd5 (26...ed5!? 27.Nc6 Rc6 28.Rc6 Ng4+=) 27.Nc6+/– White intends a5 27...Qb7 (27...Rc6 28.Rc6 Ng5 29.Ne5+/–) 28.Nd8+– Rd8 29.Qc2 Ndf6 (29...Ne7 30.Ba3+–) 30.Qc6 (30.Ba3 Ba3 31.Ra3 Ng4+–) 30...Qe7 31.a5 Nd5 32.Qc2 f5 (32...Ng5 33.Ng5 Qg5 34.Ba3+–) 33.ab6 ab6 34.Qd3 g5 (34...Ng5 35.Ng5 Qg5 36.Ba3+–) 35.Ba3 g4 36.Bd6 Rd6 (36...Nd6 37.Ne5 Qh4 38.Ra7+–) 37.Ne5 Qh4 (37...h5 38.Rc8 Rd8 39.Qc2+–) 38.Rc8 Kg7 (38...Rd8 39.Rd8 Qd8 40.Ng4 Nec3+–) 39.Ra7 Kf6 40.Rf8 (40.g3 Qh3 41.Qb5 Ng3 42.Rf8 Kg5 43.Rg7 Kh5 44.Qe8 Kh4 45.Nf3 gf3 46.hg3 Qg3 47.fg3 Kh3 48.Qh5) 40...Kg5 41.g3 Qh3 42.Nf7 (42.Nf7 Kh5 43.Rh8+–) 1–0. Markowski,T – Peck,I, Singapore, 1990. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.e3 Bb7)

5.Be2 Be7 6.0-0 a5 7.b5 0-0 8.Bb2 c6 9.Nc3 d5=.

5.Be2 Be7 6.0-0 c5 7.bc5 Bc5 8.d4 Be7 9.Bd3 0-0=.

5.Be2 Be7 6.Bb2 0-0 (6...c5 7.bc5 Bc5 8.0-0 0-0 9.Nc3 d5=; 6...a5 7.b5 0-0 8.0-0 c6 9.Nc3 d5=) 7.0-0 c5 8.bc5 Bc5 9.Ne5 d5=.

6.b5 d6 (6...d5 7.c4=+) 7.Be2 (7.dc5 bc5 8.Nbd2 Nbd7=) 7...Be7 (7...Nbd7 8.0-0=+) 8.0-0 (8.dc5 dc5 9.Qd8 Bd8=) 8...Nbd7=+ 9.a4 (9.Nc3 0-0=+) 9...0-0 10.a5 Qc7 11.a6 (11.c4 Rfc8=) 11...Bf3 12.Bf3 d5 13.Nd2 (13.Ba3 Rac8=+) 13...cd4 14.ed4 Rac8 15.Ra2 Ne8 (15...e5 16.Nb3=+) 16.c4= Ndf6 17.cd5 (17.Qa4!?=) 17...Nd5=+ 18.Qb3 1–0. Ivanets,Vladimir (2230) – Panko,Alexander (2125), RUS–ch Seniors, 2009.

6.c3 d5 (6...Be7 7.dc5 bc5 8.Nbd2 0-0 9.Rb1 Qc7=; 6...a5 7.bc5 bc5 8.Nbd2 Nc6 9.e4 Rb8=) 7.Bb5 Nbd7 8.0-0 Bd6 9.bc5 bc5=.

6.bc5 bc5 7.Nc3 d5 (7...Nc6 8.Bd3=) 8.Bb5 (8.Rb1 Bc6=) 8...Nbd7 9.0-0 c4 (9...a6 10.Ba4=) 10.Bd7 (10.Ne5 a6 11.Ba4 Bd6=) 10...Qd7 11.Rb1 Bc6 12.Ne5 Qc7 13.Nc6 Qc6 14.Qe2 Bd6 15.f3 0-0 (15...Qc7 16.g3=) 16.a4 (16.e4 Nd7=) 16...a6 (16...Rfb8 17.Bd2–/+) 17.e4= e5 18.ed5 Nd5 (18...Nd5 19.Qe4 Ne7 20.Qc6 Nc6=). Avy – Bernardo, email SOK–99–E009A, 1999.

6.bc5 bc5 7.Bd3 d5 8.dc5 Bc5 9.Nbd2 Nc6=.

6.dc5 bc5 7.bc5 Bc5 8.Bd3 0-0 9.Nbd2 d5=.

6.Bd2 Ne4 (6...cd4 7.ed4 Be7 8.Bd3 0-0 9.0-0 Be4=; 6...cb4 7.ab4 Ne4 8.Bd3 Nd2 9.Qd2 Bf3=) 7.Be2 Qf6 8.c4 Nd2 9.Qd2 cd4=.

5.b5 Bb7 6.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 c5 6.b5).

5.bc5 bc5 6.Nc3 d5=.

5.bc5 bc5 6.c4 Be7 7.Be2 0-0 8.0-0 Nc6 9.Nc3 Rb8 10.Qc2 Bb7 11.Bb2 d5 12.cd5 ed5 13.Rab1 Qd7 (13...Bc8 14.d4 c4 15.e4+=) 14.Na4+= c4 15.d3 Na5 16.Ne5 cd3 (16...Qc7 17.dc4 Bd6 18.Nf3 dc4 19.Bf6 gf6 20.Nc3 Bf3 21.Bf3 Bh2 22.Kh1=) 17.Bd3 Qd6 18.Nf3 (18.Qc3 Nc6+=) 18...Rbc8 (18...Rfc8 19.Be5 Rc2 20.Bd6 Bd6 21.Bc2+=) 19.Qe2 (19.Qd1 Bc6+=) 19...Bc6= 20.Be5 Qd7 (20...Qe6 21.Bf6 Qf6 22.Nb2=) 21.Nc3 (21.Nb2 Ne4+= (21...Ba3? 22.Bf6 gf6 23.Nd4+–)) 21...Nc4= 22.Bd4 Qg4 (22...Na3 23.Ra1 Ne4 24.Ne5+=) 23.h3 Qh5 24.a4 Ne4 25.Nb5 a6 (25...Bb5 26.ab5 Bc5 27.Be4 de4 28.Qc4 ef3 29.Rfc1=) 26.Na7+/– Rc7? (26...Ba4 27.Nc8 Rc8 28.Rb7+=) 27.Bc4 (better is 27.Be4 Ba4 28.Bd3+–) 27...dc4+/– 28.Qc4 Nd6 29.Qe2 (29.Qc2 Ra7 30.Qc6 Rc8+–) 29...Be4 (29...Bf3!? 30.Qf3 Qf3 31.gf3 Ra8=) 30.Rbc1+= (30.Qa6? Qg6 (30...Bb1?! 31.Rb1 Ra8 32.Qd3=) 31.Rfc1 Bf3–+) 30...Rd7 31.Nc6 Nf5 32.Nce5 (worse is 32.Qa6 Bf3 33.gf3 A) 33...Nd4?! A1) worse is 34.Ne7 Re7 35.ed4 Re6–/+ (35...Qh3?! 36.Rfe1 Re1 37.Re1=); A2) 34.ed4 Bd6 35.Ne5 Be5 36.de5+=; B) 33...Qh3 34.Ne7 Re7+=; 32.Ne7?! Ne7 33.Rfd1 Rfd8+/–) 32...Nh4 33.g4?? (better is 33.Rfe1 Rd6 34.Nh4 Qh4 35.f3+/–) 33...Nf3–+ 34.Qf3 Qe5 (34...Qe5 35.Qf7 Rf7 36.Be5 Rf3–+; 34...Bf3? 35.gh5 Rd4 36.ed4 Bh5 37.Rc7+–) 0–1. Kivisto,Mikko – Kekki,Jorma, Espoo FIN, 1987. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.e3 c5)

5.bc5 bc5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.d4 Nbd7 (9...cd4 10.Nd4 e5 11.Nf3=) 10.cd5 Nd5 11.e4. Gomez – Hook, Maryland, 1984.

5.Bb2 c5 6.bc5 Bc5 7.Ne5 Bh1 8.Nc3 Qc7 9.Nb5 Qb7 10.Bh3 a6 11.Nc3 Qc7 12.Nc4 Bf2! 13.Kf2 Qc4 14.Qh1 Nc6 15.a4 Qd4 16.Ke1 0-0 17.Nb5?? Qb2 18.Rd1 ab5 19.ab5 Ra1 20.Kf2 Rd1 21.Qd1 Ne4 22.Kf3 Ng5 23.Kg2 Qb5 24.Bg4 Ne5 25.h3 Ra8 26.d4 Ng4 27.hg4 Qd5 28.Kf2 Ne4 29.Ke3 Ra3 30.Qd3 Rd3 31.Kd3 f5 32.gf5 Qf5 33.Kc4 h5 (33...h5 34.Kd3 Ng3 35.Kd2 Qf4 36.Kc3 Qe3 37.Kb4 Qd4 38.Kb5 h4–+; 33...Qa5 34.Kb3 Qc3 35.Ka2 Qc2 36.Ka3 Nd2 37.e4 Qb3) 0–1. jbneville – chips, net–chess.com, 2004.

5.Bg2 c5 6.0-0 d5 7.bc5 Bc5 8.d4 Bd6 9.Nbd2 Nbd7 10.c4 0-0 11.Bb2 Qe7 12.cd5 ed5 (worse is 12...Nd5 13.e4+–) 13.e3 Rac8 14.Qb3 Rc7 15.Rfc1 Rfc8 16.Rc4?? (better is 16.Rc7 Rc7 17.Rd1=) 16...dc4–+ (16...dc4 17.Nc4 Rc4–+) 0–1. Lamailloux,Michel – Le Duigou,Jean Guy, FRA AJEC/2406 corr, 1994. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6)

5.Bg2 c5 6.c3 d5=.

5.Bg2 c5 6.bc5 bc5 7.c4 Nc6 8.0-0 Be7 9.Nc3 0-0 10.d3 Rb8 11.Bf4 d6 12.Rb1 Ba8 (12...Nh5 13.Bd2=) 13.Qa4 (13.Rb8 Qb8 14.Qd2 Qc7=) 13...Qd7 14.Bg5 h6 15.Bf6 (15.Bf4 Rfe8=) 15...Bf6+= 16.Ne4 Bb2 17.Rfd1 (17.e3 Rb6+=) 17...f5 (17...Rb6 18.e3+=) 18.Ned2 Ne5 19.Qa5 Nc6 (19...Nf3 20.Nf3 Bc6 21.Nh4–/+) 20.Qa4+= Ne5 (20...Qc7 21.Nb3 Bc3 22.e3+=) 21.Qa5–/+ Nc6 (21...Nf3!? 22.Bf3 Bf3 23.Nf3 Rb3–/+) 22.Qa4= Ne5 (22...g5 23.Nb3 Bf6 24.d4–/+) ½–½. Bronstein,David – Ivkov,Borislav, Amsterdam, 1964. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.g3 Bb7)

5.Bg2 c5 6.bc5 bc5 7.c4 Be7 8.Bb2 0-0 9.0-0 Nc6 10.Nc3 a6 11.d3 Qc7 12.e3 d6 13.Ng5 Ne5 14.e4 Nfd7 15.Nh3 Nc6 16.f4 Nd4 17.g4 Rab8 18.Rf2 Bc6 19.g5 Qa5 20.Rc1 Rb7 21.Qg4? (better is 21.Na2–/+) 21...Rfb8–+ 22.Nd1 Qe1 23.Rf1 Ne2 24.Kh1 Qd2 25.Rb1 (25.Ra1–+) 25...Qd3 (25...Rb2?! 26.Rb2 Rb2 27.Nb2 Qb2 28.e5–+) 0–1. Hailparn,Michael – Valentine,Stephen, USA–ch04 corr8082, 1980. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.g3 Bb7)

5.Bg2 c5 6.bc5 Bc5 7.0-0 d5=.

5.Bg2 c5 6.bc5 Bc5 7.c4 d5 8.cd5 (8.d4 Be7 9.cd5 Nd5=) 8...Nd5 (8...Qd5 9.Bb2=) 9.Bb2 (9.d4 Be7=) 9...0-0 10.0-0 Nc6 (10...Nd7 11.Nc3+=) 11.d4 (11.e4 Nc7=) 11...Be7 12.e4 Nf6 13.Qe2 (13.Qd3 Qd7=) 13...Rc8 (13...Nb8 14.Nc3+=) 14.Nbd2 Na5 (14...Qd7 15.Rac1=) 15.Ne1 (15.Rfc1 Qd7=) 15...Qd7 16.f4 (16.Nd3 Ba6 17.Rfc1 Qb5=) 16...Qa4+= 17.Rf3 (17.f5 Nc4 18.Nc4 Rc4=) 17...Nc6 (17...Rfd8!?–/+) 18.Qd1= Qd1 (18...Qb5 19.Rb3 Qa5 20.Rc1=) 19.Rd1 Rfd8 20.e5 (20.Nc2 Na5 21.Rc3 Rc3 22.Bc3 Rc8=) 20...Ng4 (20...Nd5 21.Rb1+=) 21.Nb3 (21.Rb3+=) 21...Nce5 (better is 21...Nb8–/+) 22.fe5+= Bf3 23.Bf3 Ne3 24.Rc1 Rc1 (24...Nc4 25.Bb7 Rb8 26.Rc4 Rb7 27.Kf2=) 25.Bc1 (worse is 25.Nc1 Nc4 26.Bc3 Na3–/+) 25...Nc4 (25...Nd5 26.Nd3+=) 26.Nc2 Rc8 27.Bd1 (27.Bb7 Rc7 28.Be4 f6 29.ef6 gf6+=) 27...b5 (27...Rd8 28.Be2 Rc8 29.Bc4 Rc4 30.Nba1=) 28.Kf2+= Rc6 (28...a5 29.Ke2+=) 29.Nd2 (29.Bf3 Rc7 30.Nb4 h6+=) 29...Bg5 (29...Nb6 30.Nf1+=) 30.Nc4 Bc1 31.Nd6 a6 32.Ne4 Rc4 (32...Bb2 33.Ke3+=) 33.Ke2 (33.Nc5 Rc3+=) 33...Bb2 34.Kd3 Ra4 (34...h6 35.Be2+=) 35.Nc5 Rc4? (better is 35...Ra5!?+/–) 36.Na6+– Ra4 (36...f6 37.ef6 gf6 38.Be2+–) 37.Nc7 Ra5 38.Ke4 Ba3 39.Nb5! Rb5 Deflection from a3 (39...Be7 40.Nc3+–) 40.Na3 Rb2 41.Nc2 (41.h4 f5 42.ef6 gf6+–) 41...Kf8 (41...f6 42.Kd3+–) 42.h4 Rb1 (42...f5 43.ef6 gf6 44.g4+–) 43.Ne3 (43.Bf3 Ke7+–) 43...Rb4 (43...f5 44.ef6 gf6 45.d5 ed5 46.Kd5 Rb5 47.Kd4 Rb4 48.Kc3+–) 44.Kd3 (44.g4 h6+–) 44...Rb2 (44...Rb1 45.Bf3+–) 45.Bc2 (45.g4 Rb1+–) 45...Ra2 46.g4 Ra1 47.Bd1 Ra2 (47...f6 48.Be2+–) 48.Nc2 (48.Nc4 Ke7+–) 48...Rb2 49.Kc3 (49.Bf3 Rb3 50.Ke4 f6+–) 49...Rb1 50.Ne3 Ra1 (50...Ke7 51.Bf3+–) 51.g5 (51.Kb2 Ra6+–) 51...g6 (51...Ra3 52.Kd2+–) 52.Kb2 Ra7 (52...Ra8 53.Nc4+–) 53.h5 (53.Nc4 Kg8+–) 53...gh5 54.Bh5 Kg7 55.Kc3 (55.Ng4 Ra4 56.Kc3 Ra3 57.Kc4 Ra4 58.Kc5 Ra5 59.Kb4 Ra1+–) 55...Ra1 (55...h6 56.gh6 Kh6 57.Be2+–) 56.d5 ed5 57.Nf5 (57.Nd5?! Rg1 58.Kd4 Rg5+/–) 57...Kf8 58.Kd4 (58.Nd6 Rg1 59.Bf7 Rg5+–) 58...Rg1 (better is 58...Rh1 59.Bf3 Rg1+–) 59.Nh6?? (better is 59.Nd6+–) 59...Rg5= 60.Bf7 (60.Bf3 Ke7=) 60...Re5 ½–½. Bernstein,S – Kornfilt,V, 5.corr ol, 1963–68. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.g3 Bb7)

5.Bg2 c5 6.bc5 Bc5 7.c4 e5 8.Nc3+=.

5.Bg2 c5 6.bc5 Bc5 7.d4 Be7=.

5.Bg2 d5 6.0-0=.

5.Bg2 d5 6.Bb2 c5 7.bc5 bc5 8.d3 Nbd7 9.Nbd2 Bd6 10.0-0 0-0 11.c4 d4 12.Rb1 Bc6 13.Ne1 Bg2 14.Kg2 Qc7 15.e4 de3 (15...Rab8 16.f4 Rb6 17.Bc1 Rb1 18.Nb1+=) 16.fe3= Ne5 17.Ndf3 Neg4 18.Nc2 Rad8 19.Qe2 Rd7 20.Rfd1 Rfd8 21.Nce1 h5 22.Bf6 Nf6 23.Rb3 Ng4 24.Rdb1 Qc6 25.Kg1 g6 26.Nh4 Be5 27.Nhf3 Bf6 28.Ng2 Kg7 29.Re1 Qa4 30.Reb1 Qc6 31.Rd1 Ne5 32.Ne5 Be5 33.Kf2 Bf6 34.Nf4 h4 35.g4 (35.gh4 Bh4 36.Kg1 Bf6=) 35...Bg5 (35...Rb7 36.Rb7 Qb7 37.a4+=) 36.h3 (better is 36.Nh3!? Be7 37.Kg1=) 36...Bf4–/+ 37.ef4 Rd4 38.Kg1 Kg8 (38...Rf4?? 39.Qe5 f6 40.Qf4+–) 39.f5 ef5 40.gf5 R4d6 (40...Qd7 41.Qf3 Qf5 42.Qf5 gf5 43.Kf2–/+) 41.Rb2 Qd7 42.Qf3 Rf6 43.Qg4 Rf5 44.Qh4 Rh5 45.Qg4 Rh3 46.Qd7 Rd7 47.Rb5 Rhd3 48.Rd3 Rd3 49.a4 Ra3 50.a5 Kg7 51.Rc5 Ra2 52.Rb5 Ra4 53.Rc5 Ra2 54.Rb5 a6 55.Rd5 Ra4 56.Rc5 f5 57.Kf2 Ra3 58.Kg2 Kh6 59.Rd5 Kg5 60.Kf2 Kg4 61.Rd6 Ra2 62.Kf1 (better is 62.Ke3 f4 63.Ke4–/+) 62...g5 63.Ra6 Kf3 64.Ke1 g4 65.Rb6 (65.c5 g3 66.Rg6 Ra5–+) 65...Ra5 66.Rb5 (66.Kd2–+) 66...Ra1 67.Kd2 f4 68.c5 g3 69.c6 Ra8 70.Rb3 Kg2 71.Ke2 f3! (71...f3 72.Rf3 Ra2 73.Ke3 Ra3 74.Ke4 Rf3–+) 0–1. Real de Azua,Ernesto – Baimoldinov,Aidar, Wch U12 Cannes, 1997. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.g3 Bb7)

6.0-0 0-0 7.Bb2 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3 Nf6 5.a3 Be7 6.Bg2 0-0 7.0-0).

6.0-0 0-0 7.c4 c5 8.bc5 bc5 9.Nc3 Nc6 10.Rb1 Rb8 11.d3 Ba8 (11...d6 12.Qa4 Qd7 13.Bf4=) 12.Rb8 Qb8 13.Bf4 d6 14.Qa4 Nd7 15.Rb1 Nb6 16.Qd1 Qc7 17.Na4 Nd7 18.Nd2 Nd4 (18...e5 19.Be3=) 19.Ba8 Ra8 20.Nb3 (20.e3 Nc6 21.Ne4 e5–/+) 20...Nb3 21.Rb3 Rb8 22.Qb1 (22.Nc3 Rb3 23.Qb3 Nf6=) 22...Rb3 23.Qb3 a6 24.Nc3 Qc6 25.g4 h6 26.h3 Nb6 27.a4 Nd7 28.f3 (28.a5 Kh7=) 28...Bd8 29.Bd2 ½–½. Ivkov,Borislav – Jansa,Vlastimil, Caorle zt, 1972. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.g3 Bb7 5.Bg2 Be7)

6.0-0 0-0 7.c4 d6 8.Qc2 Nbd7 9.Nc3 c5 10.bc5 bc5 11.d3 h6 12.Bf4 Nh5 13.Bd2 f5 14.Rab1 Bc6 (14...Rb8 15.Rb3+=) 15.Ng5 hg5 (15...Bg5 16.Bc6 Bd2 17.Ba8 Bc3 18.Bf3 Ng3 19.hg3+/–) 16.Bc6+/– Rc8 17.Bd7 (17.Bb7!? Rb8 18.Qa4+/–) 17...Qd7+= 18.Qa4 (18.Rb5 Rb8+=) 18...Qa4= 19.Na4 Rb8 20.h3 d5 (20...Kf7 21.Kg2=) 21.Be3 (better is 21.cd5!? ed5 22.Nc3+/–) 21...d4= 22.Bd2 e5 23.g4 Nf4 24.Bf4 gf4 25.gf5 Kf7 26.Rb5 (26.e3 fe3 27.fe3 de3=) 26...Rb5 27.cb5 Rb8 (27...Kf6 28.b6+=) 28.Rb1 Kf6 29.b6 ab6 30.Rb6 Rb6 31.Nb6 Kf5 32.a4 e4 33.f3 ed3 34.ed3 Ke6 35.Kf1 (35.a5 Bd8 36.Nc4 Kd7+=) 35...Bd8 36.Nc4 Bc7 (36...Kd5 37.Kf2=) 37.Ke2 (37.h4 g6+=) 37...Kd5 38.Kd1 Kc6 39.Kc2 Kb7 40.Kb3 Kc6 41.Kc2 Kd5 (41...g6 42.Kd2=) 42.h4+= g6 43.a5 Kc6 44.a6 Bb8 (44...Bd8 45.Ne5 Kb6 46.a7+/–) 45.Kb3 (better is 45.a7 Ba7 46.Ne5 Kd5 47.Ng6+–) 45...Kd5? (better is 45...Bc7 46.Nb2 Bd8+=) 46.Nb6+– Kc6 47.Nc8 Be5 48.Ne7 Kb6 49.a7 Kb7 50.Ng6 Bf6 51.h5 (51.Kc4 Ka7 52.Kc5 Kb7+–) 51...Bg5 (51...Ka7 52.Kc4 Kb6 53.Nf4+–) 52.Kc4 Ka7 53.Ne5 (better is 53.Kc5!? Kb7+–) 53...Kb6 54.Nf7 (54.Nf7 Bf6 55.h6+–) 1–0. Gurgenidze – Schneider, Biel, 1994. (=1.Nf3 Nf6 2.b4 e6 3.a3 b6 4.g3 Bb7 5.Bg2 Be7)

6.0-0 d5 7.d4=.

6.0-0 d6 7.c4 0-0 8.d3 (8.d4 c5=) 8...Nfd7 (8...c5 9.Bf4=) 9.Bb2 (9.Nc3 a6=) 9...Bf6 10.Nc3 (10.Qc2 c5=) 10...Re8 11.Qc2 Nf8 (11...c5 12.d4=) 12.e4 Nbd7 (12...c5 13.Rab1=) 13.d4+= Ng6 14.Rfd1 White plans d5 14...Qc8 15.h4 e5 (15...a5 16.h5 Ne7 17.h6+=) 16.d5 Ndf8 (16...Ne7 17.Qd3+=) 17.c5 (better is 17.h5 Ne7 18.h6+=) 17...Qg4? (better is 17...bc5 18.bc5 Rb8+=) 18.Nh2 Qc8 (18...Qd7 19.c6 Bc6 20.dc6 Qc6 21.Ng4+–) 19.c6 Ba6 (19...Bc6 20.dc6 Ne7 21.Nd5+–) 20.b5 Bb5 21.Nb5 a6 22.Nc3 h6 (22...Ne7 23.Qd3+–) 23.Nf1 (23.Qe2 Nh7+–) 23...Ne7 (23...b5 24.Ne3+–) 24.Bc1 (24.Qe2 b5+–) 24...Nh7 (24...Qg4 25.Ne3 Qh5 26.Qe2 Qe2 27.Ne2+–) 25.Qe2 Rf8 (25...Ra7 26.Rb1+–) 26.Kh2 (26.Ne3 Qd8+–) 26...Kh8 (26...Qb8 27.Rb1+–) 27.Bh3 Qd8 28.Ne3 g6 (28...Ng6 29.Qf3+–) 29.Ng4 h5 30.Nf6 Nf6 31.Bh6 Re8 32.Qf3 (32.a4 Neg8 33.Bg5 Kg7+–) 32...Neg8 (32...Nfg8 33.Bg5+–) 33.Bg5 Kg7 34.Rab1 Qe7 35.Qe2 (35.Kg1 Reb8+–) 35...Qf8 36.f3 (36.a4 Reb8+–) 36...Nh7 (36...Reb8 37.Rf1+–) 37.Bd7 (37.Be3 Qe7+–) 37...Reb8 38.Be3 Qe7 (38...Qd8 39.Qd3+–) 39.Na2 Nf8 (39...Ngf6 40.Bh3+–) 40.Bh3 Ra7 (40...a5 41.Nc3+–) 41.Nb4 Rba8 42.a4 a5 43.Nc2 (43.Nd3 Nf6+–) 43...Re8 44.Na3 Raa8 45.Nb5 Reb8 46.Rg1 Nh7 (46...Nf6 47.Rgf1+–) 47.Bd7 Qd8 48.Qf2 Ngf6 (48...Nhf6 49.Nc7 Qc7 50.Bb6 Rb6 51.Qb6 Qb6 52.Rb6 Nd7 53.cd7+–) 49.Bh3 (49.Nc7 Qc7 50.Bb6 Rb6 51.Qb6 Qb6 52.Rb6 Nd7 53.cd7 Kf6+–) 49...Qe7 50.Rg2 Re8 (50...Kg8 51.Qe2+–) 51.Qd2 (51.Rc1 Reb8+–) 51...Qd8 (51...Rab8 52.Qd3+–) 52.Nc7 (52.Qd3 Rb8+–) 52...Qc7 53.Bb6 Qe7 54.Ba5 (54.Qe3 Ng8+–) 54...Qa7 55.Rb5 Nf8 56.Qb4 (56.Qc3 Ng8+–) 56...Qe3 (56...N8h7 57.c7 Qe3 58.Rb8 Qf3 59.Qd6 Qe4 60.Bc3 Qd5 61.Be5 Qd6 62.Bd6+–) 57.Qc3 (57.Qd6?! Qf3 58.Qb4 Qe4+–) 57...Qc3 58.Bc3 Ra4 59.Bb4 g5 60.hg5 (worse is 60.Bd6 g4 61.Rc2 gh3+–) 60...N6h7 61.f4 ef4 (61...h4 62.c7 hg3 63.Kg3 ef4 64.Kf4 Ng6 65.Ke3 Rb4 66.Rb4+–) 62.gf4 Ng6 63.Bd6 Rae4 64.c7 Rc4 (64...Nh4 65.Rf2 Rc4 66.Rb8+–) 65.Rb8 Rc7 (65...Ree4 66.f5 Nf4 67.f6 Nf6 68.gf6 Kf6 69.Bf4 Rf4 70.Rb6 Ke5 71.Rc6 Kd5 72.Rg5 f5 73.Bg2 Ke5 74.c8Q Rc6 75.Qc6 Rf2 76.Qc3 Ke6 77.Rg6 Ke7 78.Rg7 Kf8 79.Qf6 Ke8 80.Qe7) 66.Bc7 (better is 66.Re8!? Ra7 67.f5 Ra6+–) 66...Re3 67.Rf2 (better is 67.f5!? Ngf8 68.Bd6 Nd7 69.f6 Ndf6 70.gf6 Kf6+–) 67...Rd3 68.d6 (68.d6 Nhf8 69.Re8+–) 1–0. Wygrecki,J – Everett,M, Lansing, 1987.

4.b5 a6 5.Bb2 A) 5...ab5 6.Nc3 Be7 (6...Nc6 7.Nb5 Be7 8.e3 d5 9.a4 0-0 10.Be2 Bd7 11.0-0 Qb6; 6...d5 7.Nb5 Be7 8.a4 Nc6 9.g3 0-0 10.Bg2 Bd7 11.0-0 Qb6; 6...c4 7.Nb5 Nc6 8.e3 d5 9.Be2 Qa5 10.a4 Bb4 11.0-0 Bd7) 7.Nb5 d5 8.a4 Nc6 9.e3 0-0 10.Be2 Bd7 11.0-0 Qb6; B) 5...d5 6.e3 Bd6 (6...ab5 7.Nc3 Nc6 8.Nb5 Be7 9.Be2 0-0 10.0-0 Bd7 11.a4 Qb6; 6...Bd7 7.a4 ab5 8.ab5 Ra1 9.Ba1 Bc8 10.Nc3 Nbd7 11.Bb2 Bd6; 6...Be7 7.Be2 ab5 8.Nc3 Nc6 9.0-0 b4 10.ab4 Ra1 11.Qa1 Nb4) 7.Be2 0-0 8.0-0 ab5 9.Nc3 Nc6 10.Nb5 e5 11.d3 d4.

4.b5 a6 5.Nc3 A) 5...d5 6.e3 (6.ba6 Na6 7.e3 c4 8.Bb2 Nc5 9.Ne5 Bd6 10.Nb5 0-0 11.Nd6 Qd6) 6...Bd6 (6...ab5 7.Bb2 Nc6 8.Nb5 Be7 9.Be2 0-0 10.0-0 Qb6 11.Rb1 Bd7; 6...Be7 7.Bb2 ab5 8.Be2 0-0 9.Nb5 Nc6 10.0-0 Bd7 11.a4 Qb6) 7.Bb2 0-0 8.ba6 ba6 9.Bd3 e5 10.e4 c4 11.Be2 de4; B) 5...ab5 B1) 6.Bb2 Ra5 (6...Nc6 7.Nb5 Be7 8.e3 0-0 9.Be2 d5 10.0-0 Qb6 11.a4 Bd7; 6...d5 7.e3 Nc6 8.Nb5 Be7 9.Be2 0-0 10.0-0 Qb6 11.a4 Bd7; 6...c4 7.Nb5 Nc6 8.e3 d5 9.Be2 Qa5 10.a4 Bb4 11.h4 Bd7; 6...Be7 7.e4 Nc6 8.Bb5 0-0 9.0-0 d5 10.e5 Ng4 11.Qe2 d4) 7.e4 b4 8.ab4 cb4 9.Ra5 Qa5 10.e5 bc3 11.Bc3 Bb4; B2) 6.Nb5 Nc6 (6...Be7 7.Bb2 Nc6 8.e3 d5 9.Be2 0-0 10.0-0 Qb6 11.a4 Bd7) 7.Bb2 Be7 8.e3 0-0 9.Be2 Qb6 10.0-0 d5 11.a4 Bd7.

4.b5 a6 5.c4 d5 (5...ab5 6.cb5 d5 7.g3 Bd6 8.Bg2 Bd7 9.0-0 0-0 10.d4 Bb5 11.Nc3 Bc4) 6.e3 (6.Bb2 ab5 7.cd5 ed5 8.e3 b4 9.ab4 Ra1 10.Ba1 cb4 11.Bb5 Bd7; 6.ba6 Na6 (6...d4 7.ab7 Bb7 8.a4 Nc6 9.d3 Be7 10.Na3 e5 11.Rb1 Qd7) 7.Nc3 d4 8.Nb5 Nc7 9.e3 Nb5 10.cb5 Bd6 11.Bc4 0-0) 6...Be7 (6...ab5 7.cd5 ed5 8.Bb2 Be7 9.Bb5 Nc6 10.0-0 0-0 11.Nc3 Bf5) 7.Bb2 (7.cd5 ed5 8.Qa4 Nbd7 9.Nc3 c4 10.Be2 Nc5 11.Qc2 Nb3) 7...0-0 (7...ab5 8.cb5 0-0 9.Be2 Nbd7 10.0-0 Qc7 11.Nc3 b6) 8.d4 (8.ba6 Na6 (8...Nc6 9.Nc3 d4 10.ab7 Bb7 11.Nb5 e5) 9.d4 (9.Nc3 Nc7 10.Bd3 dc4 11.Bc4 Qd6) 9...Qb6+= (9...cd4 10.Bd4 Nc5 11.cd5 Nd5) 10.Qc2 Bd7 11.Nc3 cd4; 8.Nc3 ab5 9.Nb5 Nc6 10.Qc2 Bd7 11.Bd3 dc4) 8...cd4 (8...ab5 9.cd5 (9.cb5 Nbd7 10.Nc3 Qc7 11.Be2 cd4) 9...c4 (9...Nd5 10.dc5 Nd7 11.Nc3 Nc5) 10.de6 Be6 11.Be2+= (11.Nc3 Nc6) 11...Nc6) 9.Bd4 dc4 (9...ab5 10.cb5 Nbd7 11.Be2 Bd6) 10.Bc4 (10.Qa4 Nbd7+= 11.Nc3 Bd6) 10...ab5–/+ 11.Bd3 (11.Bb5 Nc6) 11...b4 (11...Nc6–+) 12.a4 (12.ab4 Ra1 13.Ba1 Bb4 14.Bc3 Bc3 15.Nc3 Qa5–/+) 12...Nc6 13.Bb2 Nd5 (13...Qd5 14.Qe2–/+) 14.0-0 Bf6 15.Nd4 (15.Ra2 e5 16.Qe2 Be6–/+) 15...Bd7 (15...Nd4 16.Bd4 Bd4 17.ed4–/+) 16.Nd2 (16.Bc2 Bd4 17.Bd4 Nd4 18.Qd4 Bc6–/+) 16...Nd4 (16...Nc3 17.Bc3 bc3 18.Ne4 Nd4 19.Nf6 Qf6 20.ed4–+) 17.Bd4–/+ Bd4 18.ed4 Nc3 19.Qb3 (19.Qh5!? h6 20.Qc5–+) 19...Qb6 (19...Ba4?! 20.Qb4 Nd5 21.Qb7+=) 20.Nf3 Ba4 (20...Na4?! 21.Rfb1–/+) 21.Qb2 h6 (21...Bc6 22.Ra8 Ra8 23.Ra1–+) 22.Rfc1 Qd6 23.Re1 (23.Be2 Bc6–+) 23...Bc6 24.Re3 (24.Be2 Ra1 25.Ra1 b5–+) 24...Bf3 25.Rf3 Qd4 26.Rd1 g6 27.Re1 e5 (27...Ra2 28.Qc1 Rfa8 29.Kf1–+) 28.Rh3 (28.Rfe3–+) 28...Ra2 (28...Ra2 29.Qa2 Na2–+) 0–1. Vera,G (2020) – Carvalho,H (2175), I Comunic IRT, Sao Paulo BRA (7), 2004. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5)

4.b5 a6 5.e3 d5+= (5...ab5 6.Bb5 Nc6 7.0-0 d5 8.Nc3 Bd6 9.a4 0-0 10.Qe2 Nb4 11.d3 e5) A) 6.ba6 ba6 7.Nc3 Nc6 8.Rb1 Bd6 9.Be2 0-0 10.0-0 Bd7 11.d4 c4; B) 6.Be2 ab5 (6...Be7 7.Bb2 0-0 8.0-0 ab5 9.Nc3 Bd7 10.Nb5 Nc6 11.d3 e5; 6...Bd6 7.Nc3 e5 8.ba6 Na6 9.d4 e4 10.Ne5 Qe7 11.Bb5 Kf8; 6...c4 7.Nc3 ab5 8.Nb5 Bd7 9.Nc3 Bd6 10.0-0 Na6 11.d3 cd3; 6...Bd7 7.ba6 Na6 8.Nc3 c4 9.d3 cd3 10.cd3 Rc8 11.Bd2 Nc5) 7.Bb2 b4 8.ab4 Ra1 9.Ba1 cb4 10.Be5 Nc6 11.d4 Ne4; C) 6.a4 ab5 7.Bb5 Nc6 8.h3 Bd6 9.Bb2 0-0 10.0-0 Bd7 11.Qe2 h6; D) 6.Nc3 ab5 (6...Bd7 7.Bb2 ab5 8.Nb5 Nc6 9.a4 c4 10.Be2 Bb4 11.0-0 Qa5; 6...Be7 7.Bb2 ab5 8.Be2 Nc6 9.0-0 b4 10.ab4 Ra1 11.Qa1 Nb4) 7.Bb2 Nc6 8.Nb5 Be7 9.Be2 0-0 10.0-0 Bd7 11.a4 Qb6; E) 6.Bb2 ab5 7.Nc3 Nc6 8.Nb5 Be7 9.Be2 0-0 10.0-0 Bd7 11.a4 Qb6.

4.b5 b6 5.Bb2 A) 5...a6 6.e3 (6.Nc3 d5 7.e3 Bd6 8.ba6 Ba6 9.Nb5=; 6.ba6 d5 7.a7 Ra7 8.e3 Be7 9.Be2=) 6...d5 7.Nc3 Bd6 8.ba6 Ba6 9.Nb5=; B) 5...Bb7 6.e3 (6.Nc3 Bf3 7.ef3 d5 8.Be2 Be7 9.0-0+=; 6.d4 d5 7.dc5 Bc5 8.e3 a6 9.Bd3=) 6...d5 7.Be2 Bd6 8.Be5 Be5 9.Ne5=; C) 5...d6 6.e3 (6.Nc3 d5 7.e3 Bd6 8.Be2 0-0 9.0-0+=; 6.d4 d5 7.dc5 Bc5 8.e3 a6 9.Bd3=) 6...Be7 7.d4 0-0 8.Bd3 a6 9.dc5=; D) 5...d5= 6.e3 Bd6 7.Be2 0-0 8.0-0 a6 9.Be5+=.

4.b5 b6 5.d4 A) 5...d5 6.Bf4 (6.Bg5 a6 7.e3 Bd6 8.Nc3 0-0 9.Be2+=; 6.c4 a6 7.cd5 ed5 8.dc5 bc5 9.e3+=) 6...cd4 7.Qd4 Bc5 8.Qa4 Nbd7 9.e3+=; B) 5...Be7 6.e3 (6.Bf4 d5 7.e3 a6 8.c4 0-0 9.Nc3+=; 6.Bg5 0-0 7.e3 a6 8.dc5 bc5 9.c4+=) 6...d5 7.dc5 bc5 8.Be2 Ne4 9.0-0=; C) 5...Bb7 6.Bg5 (6.e3 a6 7.Be2 Bf3 8.Bf3 d5 9.ba6=; 6.Bf4 Bf3 7.ef3 d5 8.c4 Bd6 9.Bg5+=) 6...h6 7.Bh4 cd4 8.Nd4 a6 9.e3=; D) 5...a6 6.Nc3 (6.Bf4 ab5 7.Nc3 Ba6 8.e3 c4 9.Qb1+=; 6.e3 d5 7.dc5 bc5 8.Bb2 c4 9.ba6+=) 6...d5 7.Bg5 cd4 8.Qd4 Bc5 9.Qf4+=.

4.b5 b6 5.e3 d5 (5...a6 6.Bb2 (6.Nc3 d5 7.Bb2 Bd6 8.ba6 0-0 9.Nb5=) 6...d5 7.Nc3 Bd6 8.ba6 Ba6 9.Nb5=; 5...Be7 6.d4 (6.Bb2 d5 7.Ne5 a6 8.Be2 0-0 9.0-0=; 6.Be2 a6 7.Bb2 0-0 8.0-0 d5 9.Ne5=) 6...d5 7.dc5 bc5 8.Be2 a6 9.Nc3=; 5...Bb7 6.Bb2 (6.Be2 d5 7.Bb2 Bd6 8.0-0 0-0 9.Be5=; 6.Bd3 d5 7.Bb2 Bd6 8.0-0 0-0 9.Be2+=) 6...d5 7.Be2 Bd6 8.Be5 Be5 9.Ne5=) 6.c4 (6.Bb2 Bd6= 7.Be2 0-0 8.0-0 a6 9.Be5+=; 6.Be2 Bd6 7.Bb2 a6 8.0-0 0-0 9.Be5+=; 6.Nc3 Bd6 7.Qe2 e5 8.e4 d4 9.Nd5–/+) 6...dc4 (6...a6 7.Nc3+= Be7 8.d4 0-0 9.dc5=) 7.Bc4= Be7 (7...a6 8.Nc3 Be7 9.0-0=) 8.Bb2 (8.0-0 a6 9.d4=) 8...Bb7 (8...a6 9.Nc3=) 9.0-0 Nbd7 10.Qe2 0-0 11.a4 Qc7 12.h3 (12.d3 Bd6 13.Nbd2 a6=) 12...h6 (12...Bf3 13.Qf3 Ne5 14.Qe2=) 13.Rc1 Bd6 14.d4 Rfe8 (14...Rac8 15.Nbd2=) 15.Nbd2 e5 16.Ba2 (16.de5 Ne5 17.Be5 Be5 18.Ne5 Qe5=) 16...Qb8 (16...Rad8 17.de5 Ne5 18.Bc4=) 17.de5 Ne5 18.Nh4 (18.a5 ba5 19.Ne5 Be5+=) 18...Bd5 (18...Qc7 19.Nf5 Rad8 20.Nc4+– (20.Nd6?! Qd6 21.Nc4 Nc4 22.Bc4 Bd5+=)) 19.Bb1 (19.Bd5 Nd5 20.Ne4 Bc7+=) 19...Qb7 20.Qf1 (20.Nf5 Qc7+=) 20...Rac8 (20...g6 21.f4 Ned7 22.Qd3=) 21.Bc3 (21.Nf5 Bc7=) 21...Ne4 (21...g6 22.a5=) 22.Ne4 Be4 23.Nf5 Bc7 (23...Bf8 24.Be4 Qe4 25.Ng3=) 24.Ng3 (better is 24.f4!? Bb1 25.Rab1+/–) 24...Bb1= 25.Rcb1 (better is 25.Rab1 c4 26.Be5 Be5 27.Rc4 Bg3 28.fg3 Rc4 29.Qc4 Re3 30.Rc1=) 25...Nd7 (25...c4 26.Rd1+=) 26.Ne2 (better is 26.Nf5!? Qe4 27.Ng7+/–) 26...Be5 27.Rc1 ½–½. Stuart,E Leslie – Whitehead,Mark, Isle of Man, 1995. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5)

4.g3 cb4–/+ 5.Bg2 d5 6.Bb2 Nc6 7.0-0 Be7 8.ab4 Bb4 9.e4 (9.c4 dc4 10.Qc2 Bd6–/+) 9...0-0 10.e5 Nd7 11.c3 Be7 12.Qe2 Qc7 13.c4 Nb6 14.Na3 Ba3 (14...Qd7 15.Rfb1–/+) 15.Ba3+= Nc4 16.Bf8 Kf8 17.Rfe1 Bd7 18.d3 Nb6 19.Reb1 Be8 20.Qb2 Rb8 21.Ra3 Nc8 22.d4 b5 23.Rc3 Qb6 24.Rc5 b4 25.Bf1 a5 26.Bb5 (26.Qc2 Kg8=) 26...Ne5= 27.Ne5 Bb5 28.Qc2 Ne7 29.Qh7 Be8 30.h4 (30.Qh8 Ng8=) 30...f6 (30...a4 31.Qh8 Ng8 32.Rbc1+=) 31.Qh8= Ng8 32.Nd3 Bg6 (better is 32...b3 33.Rbc1 Qd8=) 33.Rbc1+/– Kf7?? (better is 33...Re8+/–) 34.Rc8+– Rc8 35.Rc8 Bd3 36.Rg8 Ke7 37.Rg7 Kd6 38.Qf8 (38.Qf8 Kc6 39.Qe8 Kd6 40.Qd7) 1–0. Hoti,Nimon – Woldseth,Ole, NOR–chT, 2000. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5)

5.Bb2+= A) 5...Nbd7 6.c4 (6.Nc3 Bd6 7.d4 cd4 8.Nd4 Nb6 9.e3–/+; 6.e3 Bd6 7.Be2 e5 8.0-0 0-0 9.d3+=) 6...Bd6 7.e3 0-0 8.d4 cd4 9.Nd4+=; B) 5...a6 6.e3 (6.ba6 ba6 7.e3 Bd6 8.Be2 Nc6 9.c4+=; 6.Nc3 Bd6 7.ba6 ba6 8.Na2 0-0 9.Rb1–/+) 6...Bd6 7.Be2 0-0 8.0-0 Nbd7 9.c4+=; C) 5...Bd6 6.c4 (6.e3 Nbd7 7.Be2 e5 8.0-0 0-0 9.Ng5–/+; 6.Ne5 Nbd7 7.Nd7 Bd7 8.e3 e5 9.c4+=) 6...Nbd7 7.e3 0-0 8.d4 cd4 9.Bd4+=.

5.Nc3 A) 5...d4 6.Na4 (6.Na2 Bd6 7.e3 e5 8.ed4 cd4 9.Bc4–/+; 6.Nb1 Bd6 7.e3 e5 8.ed4 cd4 9.Bc4–/+) 6...a6 7.ba6 Na6 8.e3 Bd7 9.Nb2+=; B) 5...Nbd7 6.Bb2 (6.e3 e5 7.Bb2 Bd6 8.d3 0-0 9.Be2–/+; 6.Rb1 d4 7.Na2 e5 8.d3 Bd6 9.e4–/+) 6...e5 7.e3 Bd6 8.d3 0-0 9.Be2–/+; C) 5...Bd6 6.d4 (6.e3 e5 7.d4 cd4 8.ed4 e4 9.Ne5–/+) 6...cd4 7.Qd4 Nbd7 8.Bf4 Bf4 9.Qf4–/+.

5.c4 A) 5...Bd6 6.d4 (6.e3 e5 7.d4 ed4 8.cd5 Nd5 9.ed4+=; 6.Bb2 a6 7.d4 dc4 8.dc5 Bc5 9.Qd8+=) 6...Nbd7 7.e3 0-0 8.cd5 ed5 9.dc5=; B) 5...Nbd7 6.e3 (6.Bb2 Nb6 7.cd5 ed5 8.e3 Bd6 9.Be2+=; 6.d3 Bd6 7.Bg5 h6 8.Bh4 a6 9.ba6+=) 6...Bd6 7.d4 cd4 8.ed4 dc4 9.Bc4+=; C) 5...dc4 6.e3 (6.Qc2 a6 7.Qc4 ab5 8.Qb5 Nc6 9.Ne5+=) 6...a6 7.Bc4 ab5 8.Bb5 Bd7 9.Qb3=; D) 5...a6 6.ba6 (6.Qa4 Bd6 7.d4 Nbd7 8.cd5 ed5 9.Bg5+=; 6.Qb3 ab5 7.Qb5 Nc6 8.e3 Bd6 9.d4–/+) 6...Na6 7.e3 Bd6 8.d4 0-0 9.Nc3+=.

5.e3 a6 6.ba6 Na6 7.Bb2 Be7 8.Be2 0-0 9.0-0=.

5.e3 a6 6.Bb2 Bd6 7.Be2 0-0 8.0-0 ab5 9.Nc3=.

5.e3 a6 6.Bb2 Bd7 7.a4 Be7 8.c4 0-0 9.Nc3 Qc7 10.Qc2 Bc8 11.Bd3 a5 12.Ne2 Nbd7 13.g4 dc4 14.Bc4 Nb6 (better is 14...Ng4!? 15.Rc1 Nge5 16.Ne5 Ne5–/+) 15.Bd3 Nbd5 16.g5 Nb4 17.Qb1 Nd3 18.Qd3 Nd5 19.Qc4 Nb4 20.Nf4 Rd8 21.Qc3 f6 22.Ke2 (22.Rg1 Kf8+=) 22...e5 23.Qc4 Kf8?? (better is 23...Kh8 24.Ne6 Be6 25.Qe6 Nd3–/+) 24.g6+– hg6 25.Ng6 Ke8 26.Qg8 Kd7 27.Qg7 Qd6 28.Ne7 Qe7+/– 29.Qe7 Ke7 30.Rhg1 Kf7 31.Rac1 Bf5 32.Rc5+/– Rdc8 33.Rgc1 Rc5 34.Rc5 Bg4 35.Rc4 Rg8 36.Rc7 Ke6 37.Rb7?? e4+= 38.Rb6 Kd5 39.d4 Bf3–+ 40.Kd2 Rg2 41.Kc3 Rf2 42.Rf6 Na2 43.Kb3 Bd1 44.Ka2 Rf6 45.Ka3 Rf3 46.Bc1 Rf2 47.h4 Rh2 48.h5 Rh5 49.Bd2 Rh3 50.b6 Kc6 51.b7 Kb7 52.Ba5 Re3 53.Kb4 Rb3 54.Kc5 Ra3 55.d5 Ra4 56.Bb4 Rb4! 57.Kb4 Bc2 58.Kc3 Bd3 59.Kd4 Kc7 60.Ke5 e3 61.Ke6 Bb5 62.Ke7 e2 (62...e2 63.Kf6 e1Q 64.Kf5 Bd3 65.Kf4 Kd6 66.Kf3 Be2 67.Kg2 Qf1 68.Kg3 Qf3 69.Kh2 Bf1 70.Kg1 Qg2#) 0–1. Aslan,Ziver – Tunc,Cihan, ch–TUR Kemer–Antalya TUR, 2011. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5)

5.e3 a6 6.Nc3 Bd6 7.ba6 ba6 8.Be2 Nc6 9.0-0+=.

5.e3 Bd6 6.Bb2 0-0 7.Be2 Nbd7 8.0-0 e5 9.Ng5+=.

5.e3 Bd6 6.Bb2 Nbd7 7.c4 0-0 8.Be2 Re8 9.Qc2 b6 10.d3 Bb7 11.Nbd2 a6 12.a4 e5 13.e4 d4 14.Nh4 g6 15.g4? Ne4–+ 16.de4 Qh4 17.Qd3 Bf8 18.Bc1 ab5 19.cb5 c4! 20.Nc4 Nc5 21.Qg3 Qg3 22.hg3 d3 23.Bf3 Nb3 24.Rb1 Nd4 25.Bg2 Bc5 26.Bg5? Ra4–+ 27.Nd2 Bb4 28.0-0 Bc8 29.f3 Be6 30.Be3 Nc2 31.Kf2 Ra2 32.Rfd1 Rd8 33.Bb6 Rd6 34.Bc7?? Bc5–+ 35.Kf1 Ne3 36.Ke1 Ng2 37.Kf1 Ne3 38.Ke1 Rd7 39.b6 Bb6! 40.Bb6 Nd1 41.Kd1 Rb7 42.Kc1 Rc2 43.Kd1 Bd7 44.Nf1 Rc6 45.Ne3 Rcb6 46.Rb6 Rb6 47.Nd5 Rd6 48.Kd2 Rd5! 49.ed5 Bb5 50.d6 Kf8 51.g5 Ke8 52.f4 e4 53.g4 Kd7 0–1. Sanchez Rodajo,P (1715) – Sanchez Millan,E (1975), II Patrimon Open, Alcala de Henares ESP, 2007.

5.e3 Bd6 6.c4 e5 7.d4 ed4 8.cd5 Nd5 9.ed4+=.

5.e3 Bd6 6.Be2 e5 7.Bb2 Nbd7 8.0-0 0-0 9.d3+=.

5.e3 Nbd7 6.c4 (6.Bb2 Bd6 7.Be2 e5 8.0-0 0-0 9.Ng5+=; 6.Be2 Bd6 7.0-0 0-0 8.d4 a6 9.c4+=) 6...Bd6 7.d4 0-0 8.cd5 ed5 9.dc5=.

5.e3 Be7 6.Be2 (6.Bb2 a6 7.Be2 ab5 8.Nc3 0-0 9.Nb5+=; 6.Ne5 Nbd7 7.Bb2 0-0 8.Be2 Bd6 9.f4+=) 6...a6 7.ba6 Na6 8.Bb2 0-0 9.0-0=.

5.Bb2 A) 5...d5 6.e3 (6.Ne5 Nbd7 7.e3 0-0 8.Be2 Bd6 9.f4+=) 6...a6 7.ba6 Na6 8.Be2 Bd7 9.0-0=; B) 5...d6 6.a4 (6.Nc3 d5 7.e3 Nbd7 8.Be2 e5 9.0-0+=; 6.e4 0-0 7.Nc3 d5 8.e5 Nfd7 9.Qe2+=) 6...e5 7.d3 a6 8.Nc3 0-0 9.e4=; C) 5...a6 6.ba6 Na6 7.e4 0-0 8.e5 Nd5 9.Nc3+=; D) 5...0-0 6.e3 d5 7.Be2 a6 8.a4 Nbd7 9.0-0+=.

5.c4 A) 5...d5 6.Bb2 (6.e3 a6 7.ba6 Na6 8.Bb2 0-0 9.d4+=; 6.Qc2 0-0 7.Bb2 a6 8.e3 b6 9.Nc3+=) 6...0-0 7.e3 a6 8.Nc3 ab5 9.Nb5+=; B) 5...a6 6.ba6 (6.Qa4 0-0 7.d3 d5 8.Bf4 Nbd7 9.Nc3+=; 6.Qb3 d5 7.ba6 Na6 8.Bb2 0-0 9.e3+=) 6...Na6 7.e3 0-0 8.Bb2 d5 9.d4+=; C) 5...d6 6.Bb2 (6.e3 Nbd7 7.d4 0-0 8.Bd3 d5 9.Bb2=; 6.d4 cd4 7.Qd4 e5 8.Qd1 Be6 9.e3+=) 6...e5 7.Nc3 h6 8.e4 Be6 9.Be2=; D) 5...0-0 6.Bb2 (6.d4 d5 7.e3 cd4 8.Qd4 Ne4 9.cd5+=; 6.e3 d5 7.d4 cd4 8.Qd4 Ne4 9.Qd3+=) 6...a6 7.e3 ab5 8.cb5 d5 9.Be2+=.

5.e3 0-0 6.Be2 (6.Bb2 a6 7.Be2 ab5 8.Nc3 d6 9.0-0+=) 6...a6 7.Nc3 d5 8.Bb2 d4 9.ed4=.

5.e3 a6 6.Bb2 (6.ba6 Na6 7.Be2 d5 8.Bb2 0-0 9.0-0=; 6.Be2 d5 7.ba6 Na6 8.0-0 0-0 9.Bb2+=) 6...d5 7.Be2 ab5 8.Nc3 Nc6 9.Nb5=.

5.e3 d5 6.Bb2 a6 7.ba6 Na6 8.Be2 0-0 9.0-0+=.

5.e3 d5 6.Nc3 Nbd7 7.d4 c4 8.Be2 0-0 9.0-0+=.

5.e3 d5 6.c4 Qa5 (6...0-0 7.d4+=) 7.Bb2 0-0 8.Be2 dc4 9.Bc4 Nbd7 10.Nc3 Nb6 11.Be2 Nfd5 (11...c4 12.Ne5+=) 12.Qb3 (12.e4 Nf4 13.0-0 a6=) 12...Bd7 13.Ne5 Nc7 (13...Bf6 14.Nd7 Nd7 15.0-0=) 14.Nd7 Nd7 15.Ne4 (better is 15.Bf3+=) 15...Nb5?? (better is 15...Rfd8=) 16.Bb5 Nb6 (16...Rfd8+–) 17.Bc3 Qc3 (17...c4 18.Qb1 Bb4 19.Qb4 Qb4 20.Bb4 a6 21.Bc4 Nc4+–) 18.dc3 a6 (18...Rad8 19.0-0+–) 19.Bd3 (19.Be2 Nd5 20.Qb7 Rfb8+–) 19...c4 20.Qb6 cd3 21.Qb7 Rfe8 22.0-0 f5 23.Nd2 Bf6 24.Rac1 a5 (24...Red8 25.Qc6 Kf7 26.Rfd1+–) 25.Qd7 Rad8 26.Qb5 Rd5 (26...Re7+–) 27.Qe8 1–0. Mueller,P – Zimmer,Georg, corr SOK–89–43, 1989.

5.e3 d5 6.Be2 a6 7.Bb2 ab5 8.Nc3 c4 9.Nb5+=.

5.e3 d6 6.d4 (6.Nc3 d5 7.Be2 0-0 8.0-0 Nbd7 9.d4+=) 6...0-0 7.Bd3 a6 8.0-0 ab5 9.Bb5=.

5.Bb2 Qb6–/+ 6.d4?? (better is 6.Qc1 Bf2 7.Kd1–/+) 6...Qb2–+ 7.Nbd2 Bd4 (7...Ba3 8.Rb1 Qc3 9.Rb3–+) 8.Rb1 Qc3 9.Rb3 Qc5 10.e3 (10.Nd4 Qd4 11.e3 Qc5–+) 10...Bc3 11.Bd3 b6 12.0-0 Bd2 (12...d5 13.Nc4 dc4 14.Rc3–+) 13.Qd2 Ba6 (13...0-0 14.Rc3 Qh5 15.Nd4–+) 14.Rc3 Qd6 (14...Qh5 15.e4–+) 15.Ba6 (15.e4 Qf8 16.Rd1–+) 15...Qd2 16.Rc8 Ke7 17.Rh8 Qd5 (17...Qc2?! 18.Bb7 Qb2 19.Ba8–+) 18.c4 Na6 (18...Qc6 19.Rc8 Qe4 20.Nd2 Na6 21.Ne4 Rc8 22.Nd2–+) 19.cd5 Rh8 0–1. Tangborn,Eric – Yamanaka, 1980. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5)

5.Bb2 Nc6 6.c4 0-0 7.d4 Bb6 8.e3 d5 9.Nbd2 Ba5 10.cd5 (10.Rc1 Qb6 11.Bc3 Bc3 12.Rc3 Qc7+=) 10...Nd5 (10...ed5 11.Bd3=) 11.Bd3 a6 12.0-0 b5 (12...Bd7 13.Nb3+=) 13.Qc2+/– Bb7 14.Bh7 Kh8 15.Bd3 Rc8 16.Qd1 Nc3 17.Bc3 Bc3 18.Ra2 Bd2 19.Qd2 Na5 20.Ne5 Kg8 21.Rc2 Qg5 (21...Rc2 22.Qc2 Qd6 23.Qc3+–) 22.f4+– Rc2 23.Qc2 (23.fg5?? Rd2 24.Rf2 Rf2 25.Kf2 Rc8–+; 23.Bc2?! Qd8+–) 23...Qe7 24.Qc3 Qd8 25.a4! ba4 26.Ra1 f6 27.Ng6 (27.Ra4?! fe5 28.Qa5 Qa5 29.Ra5 ef4=) 27...Rf7 28.Ra4 (28.Ra4 Qd5 29.Nh4+–) 1–0. Perea Montero,LA – Kage,B, corr ICCF, 1990. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5)

5.Nc3 0-0 6.e3 d5 (6...d6 7.Bb2=+) 7.d4 (7.Bb2 Nc6=) 7...Bd6=+ 8.Nb5 Be7 9.c4 Nc6 10.cd5 ed5 11.Bd3 Ne4 12.Bd2 (12.0-0 Bg4=) 12...Bf5=+ 13.Qb1 Nd2 (13...Rc8 14.0-0=+) 14.Nd2= Bd3 15.Qd3 a6 16.Nc3 b5 17.Qf5 Ba3? (17...Qa5 18.Nd5 Ba3 19.Qc2=) 18.Ra3= b4 19.Rb3 bc3 20.Rc3 Rc8 21.Nb3 Re8 22.Rc5 (22...Qh4 23.0-0+=). Jacewicz,Grzegorz – Pane,Alberto (+), corr 3GMM–27, 1995.

5.c4 0-0 6.e3 b6 7.Bb2 Bb7 8.Nc3 d5 9.cd5 Nd5 10.Be2 Nd7 11.Qb1 Be7 12.Ne4 N5f6 (12...f5 13.Nc3+=) 13.Nf6= Bf6 14.Bf6 Qf6 (worse is 14...gf6 15.d4+=) 15.d4 e5 16.0-0 ed4 17.Nd4 Nc5 18.Qf5 Qf5 19.Nf5 Rfd8 20.Nd4 Bd5 21.Rac1 ½–½. Pesotsky,V (2320) – Folk,P (2210), Czech Open A, Pardubice CZE, 2009. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5)

5.c4 Qa5 6.e3 Nc6 7.Bb2 Be7 8.Be2 d5 9.0-0 dc4 10.Bc4 b5 11.Be2 Bb7 12.a4 (12.Bc3 Qb6=) 12...b4 13.d4 Qd5 (13...0-0 14.Qd3+=) 14.Nbd2= Na5 (14...0-0 15.Re1=) 15.Bb5 Bc6 16.Qe2 Rb8 17.Bc6 Nc6 18.e4 Qd8 19.Rac1 Na5 20.d5 ed5 21.Bf6 Bf6 22.ed5 Kf8 23.Ne4 Qd5? (better is 23...Kg8+/–) 24.Rfd1 (24.Rfd1 Qe6 25.Qc2+/–; 24.Nf6?! gf6 25.Rc7 Kg7+=) 1–0. Rodriguez – Bass, Salta, 1993. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5)

5.e3 a6 6.Be2 Nc6 7.0-0 Qc7 8.c4 d5 9.Nc3 (9.cd5 ed5 10.Bb2 Be7=) 9...h5 (9...dc4!? 10.Qa4 0-0 11.Qc4 Be7=) 10.d4+= Be7 11.cd5 ed5 12.Qb3 Na5 13.Nd5 (better 13.Qc2+=) 13...Qd8?? (better 13...Qh2! 14.Nh2 Nb3 15.Nc7 Kd8 16.Na8 Na1=) 14.Nf6+- gf6 (14...Bf6 15.Qd1+-) 15.Qd3 Rg8 (15...Be6 16.Nd2+-) 16.Rd1 Bg4 17.Bd2 Nc6 (17...b5 18.a4 Nc4 19.Qh7+-) 18.d5 (18.Qh7 Rf8+-) 18...Bf3 19.Bf3 Ne5 20.Qe4 Bd6 21.Bb4 Qe7 (21...f5 22.Qf5 Rg5 23.Qf4 Nf3 24.Qf3+-) 22.h3 (22.Bh5 Rh8 23.Be2 f5 24.Qf5 Ng6+-) 22...Rd8 (22...f5 23.Qf5 Rg5 24.Qf4+-) 23.Rac1 (23.Bh5 b5+-) 23...Rg5 24.Bd6 Qd6 (24...Nf3 25.Qf3 Qd6 26.e4+-) 25.Qf4 (25.Be2 f5 26.Qb1 Qg6+-) 25...Kf8 (25...Nf3 26.Qf3 Rd5 27.Rd5 Qd5 28.Qf6+-) 26.Kh1 (26.Be2 Ng6 27.Qd6 Rd6+-) 26...h4 (26...Nf3 27.Qf3 Qa3 28.Qf6 Rgd5 29.Qh8 Ke7 30.Rc7 Ke6 31.Qh6 f6 32.Rd5 Rd5 33.Qh7 Rd1 34.Kh2 Qd6 35.f4+-) 27.Rd4 (27.Be4 Ng6 28.Bg6 Qf4 29.ef4 Rg6+-) 27...Kg7 (27...Qa3 28.Rb1 Qd6 29.Be4+-) 28.Rcd1 (28.a4 Nf3 29.Qf3 Rd5+-) 28...Qa3 29.Qh4?? (29.d6 Rd7+-) 29...Qd6?? (29...Nf3 30.gf3 Rh8 31.Qh8 Kh8+/-) 30.Be2+- Rh8 31.Qf4 b6 (31...Kf8 32.Ra4 Qd7 33.Qb4 Kg8 34.h4+/-) 32.Bf3 (better 32.Qh2!? Kf8+-) 32...b5 33.Rc1 b4? (better 33...Rd8+-) 34.Rc6! (34.Rb4?! Qd7 35.Be4 Rg4+-) 34...Nc6 (34...Qd8 35.Ra6 Ng6+-) 35.dc6 (better 35.Qd6 Nd4 36.ed4+-) 35...Qf4=+ 36.Rf4 Rc5?? (better 36...a5 37.Bd1 Rc5 38.Rg4 Kf8=+) 37.Rb4 Rc1 38.Kh2 a5 39.Rb7 (39.Rg4!? Kf8+-) 39...Ra8+/- 40.c7 (better 40.Rb3+/-) 40...Rc7?? (better 40...Rc8 41.Rb5 R8c7 42.Ra5 R7c2+/-) 41.Bg4 (41.Rc7 Ra6+-) 41...Ra6 (better 41...Rb7 42.Bf3 Rbb8-+) 42.Rc7+- f5 (42...a4 43.Bh5+-) 43.Bh5 (43.Bf5!? Rf6 44.g4 Rd6+-) 43...a4 44.Rf7 (44.Bf7 Kf6+-) 44...Kh6 45.Ra7 (better 45.Rf5 a3 46.Bf7+-) 45...Ra7-+ 46.Bf3 a3 (46...a3 47.Bd5 a2 48.Ba2 Ra2-+) 0-1. black_bishop_88 (2560) - SantosBarrios (2580), lichess.org, 2020. (=1.a3 e6 2.b4 c5 3.bc5 Bc5 4.e3 Nf6 5.Nf3 a6)

5.e3 b6 6.Bb2 0-0 7.d4 Be7 8.c4 Bb7 9.Bd3 Ne4 (9...d5 10.cd5 Qd5 11.Nbd2=) 10.Nc3 f5 11.Qc2 (11.0-0 Qc7=) 11...d5 (11...Nf6 12.Qe2=) 12.cd5 (12.0-0 Bd6+=) 12...ed5 (12...Nc3 13.Bc3 Bd5 14.e4 fe4 15.Be4=) 13.Qb3 (13.0-0 Ba6+=) 13...Nc3 14.Bc3 Nd7 (14...Nc6 15.0-0+=) 15.a4 (15.0-0 Rc8+=) 15...Rc8 16.a5 Qc7 (16...a6 17.0-0+=) 17.Bd2 g6 (17...a6 18.ab6 Nb6 19.Rb1+/–) 18.0-0+/– Bc6 19.Rfc1 Qd6 20.ab6 ab6 21.Bc3 Ra8 22.Ne5 Ne5 23.de5 Qc7 24.Bd4 (24.Ra8 Ra8 25.Bd4 Ra3+/–) 24...Ra1 25.Ra1 (25.Ba1 Bc5+/–) 25...Bc5 26.Rc1 Bb7 (26...f4 27.Be2 Ba8 28.e4+=) 27.Qc3 (27.Be2 Qe7+/–) 27...Ra8 (27...f4 28.ef4 Rf4 29.Bc5 bc5 30.Qc5 Qe5 31.Rb1+=) 28.h4 Qe7 29.Bc5 bc5 30.Qc5 Qe5 (30...Qh4?? 31.Rb1 f4 32.Rb7 fe3 33.Qd5 Kh8 34.Qf7 (34.fe3?! Qe1 35.Bf1 Qe3 36.Kh2 Qf4 37.g3 Qf1=) 34...ef2 35.Qf2 Qf2 36.Kf2+–) 31.Qb6 Ra1 32.Ra1 (32.Bb1 Qe7+=) 32...Qa1+= 33.Bf1 Ba8 34.Qe6 Kf8 (34...Kg7 35.Qe7 Kg8 36.h5+=) 35.h5 (35.Qd7 Kg8+=) 35...Kg7 36.hg6 ½–½. Roldan,Antonio Jose (2055) – Thayer,Charles (2005), IECC, 1998. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.e3 b6)

5.e3 b6 6.Bb2 Bb7 7.g4 0-0 8.g5 Ne8 9.Rg1 Be7 10.Bd3 f5 11.gf6 Bf6 (11...Nf6? 12.Ng5 e5 13.Be5+–) 12.Ne5 Be5 13.Be5 Bf3 14.Be2 Be2 15.Qe2 Nc6 16.Bb2 Qh4 17.Nc3 (17.Rg2 d5+=) 17...Ne5 18.0-0-0 (better is 18.Rg2!?+=) 18...Rf2–+ (worse is 18...Qf2 19.Qf2 Rf2 20.Ne4+=; worse is 18...Qh2 19.Rh1 Qf2 20.Rdf1 Qe2 21.Rf8 (21.Ne2? Rf1 22.Rf1 Nc4–+) 21...Kf8 22.Ne2–/+) 19.Qb5 Rf5 (19...d6!?–+) 20.e4–/+ Rh5 21.d4 Nf3 22.Qd7 Qf4 23.Kb1 Ng1 24.Qe6 Qf7 25.Qc6 Rd8 26.Rg1 Rd6 27.Qa8 Rh2 28.Nd5 Rg6 (28...Rf2 29.Ne3 Rg6 30.Rg6 Qg6 31.e5–/+) 29.Rd1 (29.Rg6!? hg6 30.Bc1+=) 29...h6 30.Ne3 Kh7 31.e5 Qf4 32.Rd3 (32.Bc1 Nc7 33.Qd8 Nb5–+) 32...Re2 33.Qe8 Re3 34.Rd1 Qe4 35.Qf7 b5 36.d5? (better is 36.Qa7 Rc6 37.Rc1–+) 36...Rg2 37.Rc1 Re1 38.Qc7 Rc1 39.Bc1 Qd5 0–1. Fries Nielsen,JO (2400) – Siebrecht,S (2430), 12th IHEM, Hamburg GER, 2009. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5)

5.e3 b6 6.Be2 Bb7 7.0-0 0-0 8.c4 d5 9.Bb2 dc4 10.Bc4 Nbd7 11.d4 Bd6 12.Nbd2 Rc8 13.Bd3 Be7 14.e4 (14.Qe2!?+=) 14...Nc5+= 15.Qe2 Nd3 16.Qd3 Qc7 17.Rfc1 Qf4 18.Re1 Qc7 19.Rac1 Qd7 20.Rc8 (20.Ne5!? Qa4 21.f3+=) 20...Rc8–/+ (20...Qc8?! 21.Ne5=; 20...Bc8?! 21.Rc1 Bb7 22.Ne5=) 21.d5 (21.Qb3!?–/+) 21...ed5 22.Bf6 Bf6 (worse is 22...gf6 23.ed5 Rc5 24.Qe3+=) 23.e5 Be7 24.Nd4 Qa4 25.N2b3 (25.Ra1 Bb4! 26.Qb3 Qb3 27.N2b3 Bc3–+) 25...Qc4 (25...Qa3 26.Qf5 Qb4 27.Rb1–+) 26.Qf5 Qc3 27.Rd1 g6 28.Qg4 h5 29.Qf4 Qc7 (29...Ba3 30.e6 Rf8 31.Qf6–/+) 30.Re1 Re8 (30...Ba3 31.Nb5 Qc4 32.N3d4–+) 31.h4 (31.Rc1 Qb8 32.Ra1 Rc8–/+) 31...Bf8 (31...Ba3 32.Nb5 Qc4 33.N3d4=) 32.Qg5 (better is 32.Nf3–/+) 32...Be7 33.Qg3 (33.Qf4!?=) 33...Bc8 (33...Ba6 34.a4–/+) 34.Rc1 Bc5 35.Kh1 Re5 (35...Ba6 36.f4–/+) 36.Nc5+= bc5 37.Nb5?? (better is 37.Nc6! Qc6 38.Qe5+=) 37...Qe7–+ 38.Na7 Bd7 (38...Qa7 39.Qe5 Be6 40.Rb1+/–) 39.a4 Re4 (worse is 39...Ba4 40.Nc8 Qf6 41.Rc5–+) 40.Qb8 (40.Kg1 c4 (40...Ba4?! 41.Nc8 Qe6 42.Rc5–+) 41.Nb5 Rh4–+ (41...Qh4?! 42.Qh4 Rh4 43.f3–+)) 40...Kh7 41.a5 Re1 (41...d4!? 42.Qg3–+) 42.Re1 Qe1 43.Kh2 Qa5 44.Qf4 Be6 (44...Qa7?! 45.Qf7 Kh6 46.Qf8 Kh7 47.Qf7 Kh6 48.Qf8 Kh7 49.Qf7=) 45.Nc6 Qb6 46.Ne5 Qb4 (46...Kg7!? 47.Nf3 f6 48.Kg1–+) 47.Qg5 Kg7 (47...Qb2 48.Ng6 fg6 49.Qe7 Kh6 50.Qc5–+) 48.Nf3 (48.Nd3 Qb8 49.Nf4 Kh7–+) 48...f6 49.Qe3 Qb6 50.Qf4 (50.Kg1 d4 51.Qe4 Qd6–+) 50...Qd8 (50...d4 51.Nd2–+) 51.g3 (51.Kg1 d4–+) 51...d4 52.Qe4 (52.Kg1–+) 52...Bd5 53.Qf4 (53.Nd4 Be4 54.Ne6 Kf7 55.Nd8 Ke7 56.Kg1–+) 53...Bf3 54.Qf3 Qc7 (better is 54...d3 55.Qd1 d2 56.Kg1–+) 55.Qh5 (55.Qd5 c4 56.Qd4–+) 55...Kg8 (55...Kg8 56.Qg6 Qg7=; 55...gh5 56.Kg2 d3 57.Kg1 d2 58.f4 d1Q 59.Kh2 Qb7 60.g4 Qg4 61.f5 Qbg2) 0–1. Dominguez,JM (2345) – Irwanto,Sadikin (2440), 38th Olympiad, Dresden GER, 2008. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5)

5.e3 Bb6 6.Bb2 d5 7.Bf6 (7.Ne5 0-0=) 7...Qf6 8.d4 Nc6 9.Nbd2 0-0 10.Bd3 e5 11.de5 Ne5 12.Ne5 Qe5 13.0-0 Qf6 (13...Bc7 14.Nf3 Qd6 15.c4=) 14.Nf3 (better 14.Qh5!? Qh6 15.Qh6 gh6 16.Nf3+/-) 14...Bg4= 15.h3 Bh5 (15...Bf3 16.Qf3 Qf3 17.gf3=+) 16.Be2 (16.g4!? Bg6 17.Bg6 fg6 18.Qd5 Kh8 19.Nd4+=) 16...Rad8 17.Nd4 (17.Qd2 d4 18.Nd4 Bd4 19.ed4 Rd4=+) 17...Bg6 (17...Bd4 18.ed4 Be2 19.Qe2 Qd4 20.Rfe1-/+) 18.Bd3 Rfe8 19.Bg6 hg6 (19...Qg6 20.Rb1=) 20.c3 Rc8 21.Qd3 Rc4 22.Rab1 Rec8 23.Rb3 (23.Ne2 R4c5+=) 23...Qd6 (23...Bd4 24.cd4 b6 25.Rb4=) 24.Rfb1 (24.Ne2 R4c5+=) 24...Bc7 (24...Bd4 25.ed4 Qc6 26.Rb7 Rc3 27.Qe2=) 25.g3 Qd7 (25...Bb6!?=) 26.Rb7+= Qh3 27.Ne2 Bb6? (better 27...Rd8!? 28.e4 Qc8 29.ed5 Bb6=) 28.Qd5+- Qf5 29.Qf5 gf5 30.Rd7 g6 31.Kg2 Kg7 32.Rbd1 (32.Rb3 Kf6+/-) 32...R8c7 (32...Ra4!?+/-) 33.Rc7 Rc7 34.Rd5 (34.Rb1 Ba5 35.Rb3 Kf6+/-) 34...Kf6 (34...Rc4 35.Kf3+=) 35.a4+/- Ke6 (35...Rc4 36.a5 Bc7 37.Rd4+=) 36.Rb5 Rc5 37.Rc5 Bc5 38.Kf3 (better 38.Nf4!? Kd6 39.c4+/-) 38...Kd5+= 39.Kf4 Kc4 (39...Bf8 40.Nd4+=) 40.Kg5 Be7 41.Kh6 Bf6 42.Kh7 Bc3?? (42...Kd3 43.Nd4 f4 44.ef4 Kc3+-) 43.Kg8 (43.Nc3 Kc3 44.Kg7 a5 45.Kf7 Kb4 46.Kg6 Ka4 47.Kf5 Kb4+-) 43...Kd3?? (better 43...Be1 44.Kf7 Bf2 45.Kg6 Kd3=) 44.Nc3+- Kc3 45.Kf7 Kb4 46.Kg6 Ka4 47.Kf5 (better 47.g4 fg4 48.e4 Kb3+-) 47...Kb5 (47...a5 48.g4 Kb4+-) 48.g4 a5 49.g5 a4 50.g6 a3 51.g7 a2 52.g8Q a1Q 53.Qe6 (53.Qd5 Kb6 54.Qd4 Qd4 55.ed4 Kc6+-) 53...Kb4 (53...Qf1 54.f4+-) 54.Qe5 (better 54.Qe4 Kb5 55.Qe5 Qe5 56.Ke5 Kc4+-) 54...Qe5 (54...Qf1+-) 55.Ke5 Kc5 56.f4 Kc6 57.Ke6 Kc7 58.f5 Kd8 59.Kf7 Kd7 60.Kg8 (better 60.e4 Kd6 61.Kf6 Kd7+-) 60...Kd6 61.e4 Ke5 62.f6 (better 62.Kf7+-) 62…Kf6= ½-½. black_bishop_88 (2485) - Setareasemuni (2330), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Nf6 4.e3 Bc5 5.Nf3 Bb6)

5.e3 Nc6 6.d4 Be7 7.c4 d5 8.Nbd2 Qa5 9.Bb2 0-0 10.Bd3 (10.Be2 dc4 11.Bc4 Rd8 (11...b5 12.Bd3 Bb7 13.0-0 Rfc8 14.Rc1 Rc7=) 12.0-0 Bd7 13.e4 Qh5 14.Bd3 Rac8=; 10.Qb3 Ne4 (10...Bd6 11.c5 Be7 12.Bd3 Qc7 13.0-0 Rb8 14.Rab1 b6=) 11.Bd3 Rd8 (11...Nd2 12.Nd2 dc4 13.Qc4 Bd7 14.Qb5 Qd8=) 12.Qc2 f5 13.0-0 Bd7 14.Rfc1 Rac8=; 10.cd5 ed5 11.Bd3 Ne4 (11...Be6 12.0-0 Rac8 13.Rb1 Rfe8 14.Nb3 Qc7=) 12.Qc2 f5 13.0-0 Be6 14.Rfd1 Qb6=) 10...dc4 11.Bc4 e5 (11...b5 12.Bd3= Bb7 13.0-0 Rfc8 14.Rc1 Rc7=; 11...Rd8 12.0-0 Bd7 13.Rc1 Rac8 14.Qb3 Qh5=) 12.0-0 (12.Ne5 Ne5 13.de5 Ne4+= 14.f3 b5+=) 12...Rd8 (12...ed4 13.Nd4 Nd4 14.Bd4= Rd8=) 13.Ng5 (13.Qb3 e4 (13...ed4 14.Bf7 Kf8 15.ed4 Bd6+/–) 14.Bf7 Kf8+/–) 13...Bg4 (13...Nd5 14.Nb3 Qa4 15.Nf7 Qc4 (worse is 15...Kf7 16.Qf3 Ke6 17.Rfc1+–) 16.Nd8 A) worse is 16...Bd8 17.Rc1 (worse is 17.de5 Be6=) 17...Qa4 18.de5+=; B) 16...Nd8 17.de5 Nc6=) 14.Qc2 (14.Nb3 Qa4+/–) 14...Bh5? (better is 14...ed4 15.Nf7 Rd5+/–) 15.Nb3+– Qa4 16.de5 Bg6?? (better is 16...Ne5 17.Be5 Bg6 18.Bf7 Bf7 19.Bf6 Bf6 20.Qh7 Kf8 21.Nf7 Kf7+–) 17.Bf7! Bf7 18.ef6 (18.Nf7 Kf7 19.ef6 Bf6 20.Bf6 Kf6 21.Qc3 Kg6+–) 18...Bg6 19.f7! Kh8 (19...Bf7 20.Qf5 (20.Qh7)) 20.Qc3 Bf8 21.Ne6 Bf7 22.Nbc5 (22.Nbc5 Qg4 23.Nd8 Nd8 24.Rac1+–) 1–0. Santasiere,Anthony – Draxl,Juege, Kitchener Ontario, 1960.

5.e3 d5 6.d4 Bd6 7.Nbd2 (7.c4 0-0=) 7...Qa5 (7...0-0 8.Bd3+=) 8.Bd3= Qc3 (8...Nc6 9.0-0=) 9.Ra2 Nbd7 (9...Nc6!?=) 10.Bb2+= Qc6 11.0-0 Nb6 12.Qe2 a6 (12...0-0 13.c4 dc4 14.Nc4 Nc4 15.Bc4+=) 13.c4 (13.Ne5 Qc7 14.c4 dc4 15.Bc4 Qe7+/–) 13...Na4 (13...dc4 14.Bc4 0-0 15.Rc1+/–) 14.Ba1 (14.Ne5 Qc7 15.Ndf3 Nb2 16.Qb2 0-0+/–) 14...0-0 15.c5 (15.Rc2 Qd7+/–) 15...Be7 (15...Bc7!?+=) 16.Ne5+/– Qc7 17.Bc2 Qa5? (17...b5 18.c6+/–) 18.Qd3 (18.Qd1 Nc5 19.dc5 Qc5+–) 18...b5? (18...g6 19.c6+/–) 19.g4 (better is 19.cb6 Bb7 20.Qb3 Nb6 21.Rb1+–) 19...g6+/– 20.f3 (20.g5 Nh5 21.Ndf3 Qd8+–) 20...Qc7 21.g5 (21.c6 Ne8+/–) 21...Ne8 (better is 21...Nd7!? 22.Nd7 Bd7=) 22.f4+/– f6? (better is 22...Ng7+/–) 23.Ng6+– hg6 (23...Bc5 24.Nf8 Bf8+–) 24.Qg6 Ng7 25.Qh7 (25.Qh7 Kf7 26.Bg6) 1–0. Schindler,Rudolf – Poeltelt,H (1730), Berlin GER, 2012. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5)

5.e3 d5 6.Be2 Bd6 7.0-0 e5 8.Bb2 Nc6 9.c4 e4 10.Nd4 Nd4 11.Bd4 0-0 (11...dc4 12.Qa4 Bd7 13.Qc4=) 12.cd5 Nd5 13.Nc3 (13.d3 ed3 14.Bd3 Qh4=) 13...Nc3=+ 14.dc3 Qh4 15.g3 Qe7 16.Qb3 Bh3 17.Rfd1 b6 18.a4 Rad8 19.a5 ba5 (19...Bc5 20.c4=) 20.Ra5+= Rd7 21.Qa4 Rfd8 22.Ra7 Ra7 23.Qa7 Qe6?? (23...Rd7 24.Qa5+/-) 24.Qb6 (better 24.Bc5+-) 24...h6?? (better 24...Rb8 25.Qa5 Be7+=) 25.Qd8+- Kh7 26.Bg7! (26.Bg7 Kg7 27.Rd6+-) 1-0. black_bishop_88 (2500) - A_Zubarev (2455), Ukrainian Bullet League, lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Bc5 4.e3 Nf6 5.Nf3)

5.e3 Be7 6.Be2 d6 7.0-0 b6 8.c4 Bb7 9.a4 Nbd7 10.a5 ba5 11.Nc3 0-0 12.d4 Ne4 13.Ne4 Be4 14.Bd2 The isolani on a5 becomes a target 14...Qc8 15.Ba5 Qc6 (15...Qb7 16.Bd3=) 16.Qa4 (16.Nd2 Bg2 17.d5 Bd5 18.cd5 Qd5+=) 16...Rfb8 17.Qc6 Bc6 18.Rfb1 Kf8 19.Nd2 Ke8 20.f3 a6 21.e4 (21.Bd3 f5=) 21...Rb1=+ 22.Rb1 Rb8 (22...Bf6 23.Bc3=) 23.Rb8 Nb8 24.d5 Ba4 25.Bc7 Nd7 26.f4 Nc5 27.e5 Kd7 28.Bb6 Nb3 29.Nb3 Bb3 30.ed6 (30.c5 dc5 31.d6 Bd8 32.Bc5 Kc6+=) 30...Bd6 31.c5 Bf4 32.de6 (better 32.c6 Kc8 33.Ba6 Kb8 34.de6 fe6 35.Bb5=) 32...Be6-/+ 33.Ba6 Kc6 34.Bd3 Be3 35.Kf1 Bc5 (35...g6!?-/+) 36.Bc5=+ Kc5 37.Bh7 g6 38.h4 Kd6 39.Kf2 Ke5 40.h5 gh5 41.Kg3 Kf6 (41...f5!?-/+) 42.Kh4 Bg4 43.g3 Kg7 44.Bb1 Kh6 45.Bc2 f6 (45...Be2 46.Bf5=+) 46.Bd3 Bf3 47.Bc2 (47.Bb5 Kg6=) 47...Bd5 48.Bd3 Bf7 (48...Bc6 49.Be2=) 49.Bc2 Bg6 50.Bd1 Attacks the isolani on h5 50...Bf7 51.Bf3 Bg6 52.Be2 Be8 53.Bf3 f5 54.Be2 Bg6 55.Bh5?? (55.Bd3 Bh7=) 55...Kg7 (better 55...Bh5 56.Kh3 Bf3-+) 56.Bg6 Kg6 57.g4 Kf6 58.g5 Kg6 59.Kg3 Kg5 0-1. black_bishop_88 (2555) - kunfuPANDA2 (2630), lichess.org, 2020. (=1.a3 c5 2.b4 Nf6 3.bc5 e6 4.e3 Bc5 5.Nf3 Be7)

5.g3 Nc6 6.Bg2 d5 7.0-0 0-0 8.Bb2 Ne4 9.e3 Be7 10.d3 Nc5 11.Nc3 Bf6 12.d4 Qa5 13.Nd2 Na4 (13...Nd7 14.Nb3 Qd8 15.e4=) 14.Na4+= Qa4 15.c4 Qd1 16.Rfd1 dc4 17.Nc4 Bd7 18.Rab1 Rfd8 (18...Be7 19.e4 b5 20.Ne3+–) 19.Nd6 Rab8 (19...Bc8 20.d5 ed5 21.Nb7 (21.Rd5?! Be7 22.Nc8 Rac8+=) 21...Bb7 22.Bf6+–) 20.d5 Na5 21.Bf6 gf6 22.de6 (22.Ne4 f5 23.Nc5 b6 24.Nd7 Rd7 25.de6 Rd1 26.Rd1 fe6+–) 22...Be6 23.f4 Rd7 24.Ne4 Rd1 25.Rd1 Kg7 26.Nc5 Bg4 27.Rd4 Rc8 28.Nd3 Rc3 29.a4 Ra3 30.h3 Be2 31.Nc5 b6 (worse 31...Re3 32.Kf2 Rc3 33.Nb7 (33.Ke2?! Rc5 34.Kd3 Rc1=) 33...Nb7 34.Bb7+–) 32.Nd7 Re3 33.Kf2 Rd3 34.Re4 (34.Rd3!? Bd3 35.Nb8=+) 34...Bd1–/+ (34...Rd7?! 35.Re2 f5 36.Re5=) 35.Nb8 Rd8 36.Na6 Kf8 (36...Rd2 37.Kg1–/+) 37.Nc7 Bc2 38.Rb4 Rd2 39.Kg1 Rd1 (39...Nb3 40.Nd5–/+) 40.Kf2=+ Ra1 Attacking the isolated pawn on a4 41.Nb5 Ra4 (worse 41...Ba4 42.Na7 Ra2 43.Kg1=) 42.Ra4 (42.Na7?? Rb4 43.Bf3 Rb2–+) 42...Ba4 43.Na7 Bd7 44.Ke3 Ke7 45.Bf1 Kd6 46.Nb5 Kc5 47.Nc3 Nc4 48.Bc4 Kc4 49.Ne4 Bh3 50.Kd2 (50.Nf6 h6–/+) 50...Bg4 51.Nf6 h5 52.Ne4 Kd4 53.Nd6 f5 54.Nc8? (54.Nf7 b5–+) 54...b5 (54...Ke4 55.Nb6 Kf3 56.Ke1–+) 55.Na7? (55.Nd6 b4 56.Nf7 b3–+) 55...Kc4 (better 55...Ke4 56.Nb5 Kf3–+) 56.Nb5? (better 56.Kc1–+) 56…Kb5 0–1. Simonsen,H (2150) – Samuelsen,C (2225), ch–FAI, 2018. (=1.a3 Nf6 2.Nf3 c5 3.b4 e6 4.bc5 Bc5)

6.c4 0-0 7.Bg5 Ba5 A) 8.Bd2 A1) 8...Ne4 9.e3 (9.Ba5 Qa5 10.Nbd2 f5 11.e3 Nc6 12.Bd3=; 9.Qc2 f5 10.e3 Nd2 11.Nbd2 d6 12.Be2=) 9...d5 10.Qc2 h6 11.Bd3 Nd2 12.Nbd2+=; A2) 8...Bc7 9.Nc3 (9.e3 Nc6 10.Nc3 d5 11.Rc1 a6 12.cd5=; 9.Bb4 Re8 10.e3 d5 11.Be2 Nc6 12.0-0=) 9...d5 10.cd5 ed5 11.Qb3 Nc6 12.Rc1=; A3) 8...d5 9.cd5 (9.e3 Nc6 10.Ba5 Qa5 11.Nbd2 Re8 12.Qb3=; 9.Ba5 Qa5 10.Qd2 Qc7 11.e3 dc4 12.Qb4=) 9...ed5 10.e3 Ne4 11.Bd3 Re8 12.0-0=; A4) 8...Nc6 9.Qa4 (9.e3 d6 10.Bd3 e5 11.d5 Ne7 12.Nc3=; 9.Ba5 Qa5 10.Qd2 Qc7 11.Nc3 d5 12.e3=) 9...Bc7 10.Nc3 d5 11.Rc1 dc4 12.Qc4=; B) 8.Nbd2 B1) 8...h6 9.Bf6 Qf6 10.e3 b6 11.Bd3 Bb7 12.0-0+=; B2) 8...Nc6 9.e3 (9.d5 Nb8 10.e4 h6 11.Bf6 Qf6 12.e5=; 9.Rb1 h6 10.Bf6 Qf6 11.e3 Qg6 12.Qb3=) 9...h6 10.Bf6 Qf6 11.Bd3 Bc3 12.Rb1+=; B3) 8...d6 9.e3 (9.Rc1 h6 10.Bf6 Qf6 11.e3 e5 12.Bd3=; 9.Rb1 Nbd7 10.e3 e5 11.Be2 e4 12.Ng1=) 9...h6 10.Bf6 Qf6 11.Bd3 Bd7 12.0-0+=; B4) 8...d5 9.e3 (9.cd5 ed5 10.e3 h6 11.Bf6 Qf6 12.Qb3=; 9.Rc1 dc4 10.Rc4 Bd7 11.e3 Bb5 12.Rc1=) 9...h6 10.Bh4 Bc3 11.Rb1 g5 12.Bg3=.

6.c4 0-0 7.Bg5 Nc6 A) 8.Nc3 A1) 8...h6 9.Bf6 Qf6 10.e3 d6 11.Bd3 Ba5 12.Rc1=; A2) 8...Ba5 9.Rc1 (9.Qd2 h6 10.Bf6 Qf6 11.Rc1 d6 12.e3+=; 9.Qd3 d6 10.Rc1 e5 11.e4 ed4 12.Nd4+=) 9...Qe7 10.Qb3 e5 11.Bf6 Qf6 12.de5=; A3) 8...d5 9.cd5 (9.Rc1 Ba5 10.cd5 ed5 11.Qb3 Qd6 12.Bf6=; 9.e3 Ba5 10.Qd2 h6 11.Bf6 Qf6 12.Rc1=) 9...ed5 10.Rc1 Ba5 11.Qb3 Qd6 12.Bf6=; A4) 8...d6 9.e3 (9.Rb1 Ba5 10.Qd2 e5 11.d5 Nb8 12.Rb5+=; 9.d5 Ne5 10.Ne5 de5 11.e4 Bd4 12.Qc2+=) 9...Ba5 10.Qd2 h6 11.Bf6 Qf6 12.Bd3=; B) 8.c5 B1) 8...Bc7 9.Nbd2 (9.Nc3 d6 10.cd6 Bd6 11.e4 Be7 12.Bc4=; 9.e4 h6 10.Bf6 Ba5 11.Ke2 Qf6 12.e5+=) 9...d6 10.cd6 Bd6 11.e3 Be7 12.Bd3=; B2) 8...Ba5 9.Bd2 (9.Nbd2 d6 10.cd6 Qd6 11.Bf6 gf6 12.e3=) 9...Ne4 10.e3 d6 11.cd6 Nd2 12.Nbd2=; C) 8.Qd3 C1) 8...d6 9.e3 (9.Nc3 e5 10.de5 Ne5 11.Ne5 de5 12.Qd8+=; 9.Nbd2 h6 10.Bf6 Qf6 11.Ne4 Qd8 12.Rd1+=) 9...h6 10.Bh4 e5 11.Nc3 Ba5 12.0-0-0+=; C2) 8...d5 9.e3 (9.c5 Ba5 10.Nbd2 h6 11.Bh4 g5 12.Bg3+=; 9.cd5 ed5 10.e3 h6 11.Bh4 Ba5 12.Nfd2=) 9...dc4 10.Qc4 h6 11.Bf6 Qf6 12.Nc3=; C3) 8...Ba5 9.Nc3 (9.Nbd2 d5 10.Rc1 h6 11.Bh4 Bd7 12.cd5=) 9...Qb6 10.Bd2 Qb2 11.Ra2 Qb3 12.Qc2=; C4) 8...h6 9.Bh4 (9.Bf6 Qf6 10.e3 e5 11.Nc3 Ba5 12.Kd1+=; 9.Bf4 d6 10.e3 Ba5 11.Nbd2 e5 12.de5+=) 9...d6 10.Nc3 e5 11.e3 Ba5 12.0-0-0+=; D) 8.e3 D1) 8...Ba5 9.Nfd2 (9.Nbd2 h6 10.Bf6 Qf6 11.Bd3 Bc3 12.Rb1+=) 9...d6 10.Bd3 h6 11.Bh4 Re8 12.0-0+=; D2) 8...d6 9.Bd3 (9.Nbd2 h6 10.Bf6 Qf6 11.Bd3 e5 12.d5=) 9...h6 10.Bh4 Ba5 11.Nbd2 g5 12.Bg3+=; D3) 8...Bc7 9.Nbd2 (9.Bd3 h6 10.Bh4 d5 11.cd5 ed5 12.Qb3=; 9.Be2 h6 10.Bh4 Ba5 11.Nfd2 Re8 12.0-0+=) 9...h6 10.Bh4 d6 11.Bd3 g5 12.Bg3+=; D4) 8...h6 9.Bh4 (9.Bf6 Qf6 10.Nbd2 e5 11.d5 Nb8 12.Bd3=) 9...Ba5 10.Nbd2 d6 11.Bd3 g5 12.Bg3+=.

6.c4 0-0 7.Bg5 d5 8.e3 (8.Nbd2 A) 8...Ba5 9.e3 (9.cd5 ed5 10.Qb3 Nbd7 11.e3 h6 12.Bf4=; 9.Rc1 dc4 10.Rc4 Bd7 11.e3 Bb5 12.Rc1=) 9...h6 10.Bf6 Qf6 11.cd5 ed5 12.Qb3+=; B) 8...Bc7 9.e3 (9.cd5 ed5 10.e3 h6 11.Bh4 Nc6 12.Rc1+=; 9.Rc1 Bd6 10.c5 Be7 11.e3 Nc6 12.Bd3+=) 9...h6 10.Bh4 Nc6 11.cd5 ed5 12.Rc1+=; C) 8...Nc6 9.e3 dc4 10.Bc4 h6 11.Bh4 Bc7 12.0-0+=; D) 8...h6 9.Bf6 (9.Bf4 Ba5 10.e3 Bc3 11.Ra2 Ne4 12.Rc2=) 9...Qf6 10.e3 Nc6 11.Bd3 Bc7 12.cd5=; 8.cd5 A) 8...ed5 9.Nbd2 (9.e3 h6 10.Bf6 Qf6 11.Qb3 Be6 12.Bd3=; 9.Nc3 Ba5 10.Rc1 Qc7 11.Bd2 Nc6 12.e3=) 9...h6 10.Bf6 Qf6 11.e3 Re8 12.Bb5=; B) 8...Ba5 9.Nbd2 (9.Bd2 ed5 10.e3 Ne4 11.Qb3 Nc6 12.Bd3=) 9...ed5 10.Qb3 Nbd7 11.e3 h6 12.Bf4=; 8.Qd3 A) 8...h6 9.Bd2 (9.Bf6 Qf6 10.Nbd2 Nc6 11.e3 Ba5 12.cd5=; 9.Bf4 dc4 10.Qc4 Nc6 11.e3 Ba5 12.Nfd2+=) 9...dc4 10.Qc4 Nc6 11.e3 Bd7 12.Qb3=; B) 8...Ba5 9.Nbd2 (9.Bd2 Nc6 10.e3 dc4 11.Qc4 Bc7 12.Bc3+=) 9...dc4 10.Qc4 h6 11.Bf6 Qf6 12.e3=; C) 8...Nc6 9.cd5 (9.c5 Ba5 10.Nbd2 h6 11.Bh4 g5 12.Bg3+=; 9.e3 dc4 10.Qc4 h6 11.Bf6 Qf6 12.Nc3=) 9...ed5 10.e3 Bg4 11.Be2 Ba5 12.Nbd2=; D) 8...dc4 9.Qc4 h6 10.Bf4 Nc6 11.e3 Ba5 12.Nfd2+=) 8...Nc6 (8...h6 9.Bh4= (9.Bf6 Ba5 10.Nbd2 Qf6 11.cd5 ed5 12.Qb3=; 9.Bf4 Ba5 10.Nbd2 Bc3 11.Ra2 Ne4 12.Rc2=) 9...Nc6 10.Nbd2 Ba5 11.Rc1 Re8 12.Bd3+=; 8...Ba5 9.Nbd2 (9.Nfd2 Qb6 10.Qc2 Nbd7 11.Nc3 Qc6 12.Rc1=) 9...h6 10.Bh4 Nc6 11.Rc1 Re8 12.Bd3+=) 9.Nbd2+= (9.cd5 ed5 10.Qb3 Be6 11.Bd3 Rc8 12.0-0=) 9...h6 (9...Ba5 10.Rc1 h6 11.Bh4 Bd7 12.cd5+=) 10.Bh4 Bc7 11.Bd3 (11.cd5 ed5 12.Qb3+=) 11...Qd7 (11...Re8 12.0-0+=; 11...dc4 12.Nc4+=) 12.Bf6+/– gf6 13.cd5 ed5 (13...Qd5 14.Be4 Qd6 15.Nc4+/–) 14.0-0 Qd6 (14...Re8 15.Rc1+/–) 15.Qb1 Be6 (15...Re8!?+/–) 16.Qb7+– Rab8 17.Qa6 Rb6 18.Qa4 Rb7 (18...Rfb8 19.Rfb1+–) 19.Rab1 Bb6 20.Rfc1 Ne7 (20...Rc7 21.Rc2+–) 21.Nb3 Bd7 22.Qb4 Qb4 23.ab4 Rc7 (23...Rfb8 24.Ra1+–) 24.Rc7 Bc7 25.Nc5 Bg4 26.h3 Bc8 (26...Bf3 27.gf3 Rc8 28.Ra1+–) 27.Rc1 (27.Ra1 Bb8+–) 27...Rd8 (27...Nc6 28.b5 Nb4 29.Be2+–) 28.Nh4 (28.b5 Bf5+–) 28...Bd6 29.Ra1 Bb8 30.g4 (30.b5 Kg7+–) 30...h5 31.Nf5 (31.gh5 Kg7+–) 31...Nf5 32.Bf5 hg4 33.Bc8 Rc8 34.hg4 1–0. Rosner,Dirk – Marshall, corr SOK–98–E003A, 1998.

6.c4 0-0 7.Bg5 d6 A) 8.Nc3 A1) 8...Ba5 9.Qd3 (9.Rc1 Nbd7 10.Qc2 Qc7 11.e3 e5 12.Be2=; 9.Qd2 Nbd7 10.Qd3 e5 11.Nd2 h6 12.Bf6+=) 9...Bd7 10.Nd2 h6 11.Bh4 Bc6 12.Rc1=; A2) 8...Nc6 9.Rb1 (9.Qd3 e5 10.de5 Ne5 11.Ne5 de5 12.Qd8+=; 9.e3 Ba5 10.Qd2 h6 11.Bf6 Qf6 12.Bd3=) 9...Ba5 10.Rb3 e5 11.d5 Bc3 12.Rc3=; A3) 8...h6 9.Bf6 (9.Bd2 e5 10.c5 dc5 11.de5 Nfd7 12.Bf4+=) 9...Qf6 10.e3 Ba5 11.Rc1 Nc6 12.Be2=; A4) 8...Nbd7 9.Rb1 (9.Qd3 h6 10.Bh4 e5 11.e3 Qe8 12.de5+=; 9.e3 Ba5 10.Qc2 Qc7 11.Bd3 b5 12.Kd1+=) 9...Ba5 10.Qd3 e5 11.Nd2 ed4 12.Qd4=; B) 8.Qd3 B1) 8...e5 9.e3 (9.Nc3 Nc6 10.de5 Ne5 11.Ne5 de5 12.Qd8+=; 9.e4 ed4 10.Nd4 h6 11.Be3 Ng4 12.Nc3+=) 9...ed4 10.ed4 Re8 11.Be2 Nc6 12.0-0=; B2) 8...h6 9.Bf6 (9.Bf4 Nc6 10.e3 Ba5 11.Nbd2 e5 12.de5+=; 9.Bh4 Nc6 10.Nc3 e5 11.Bf6 Qf6 12.Nd5+=) 9...Qf6 10.e3 Ba5 11.Nbd2 Nc6 12.Be2=; B3) 8...Nc6 9.e3 (9.Nc3 e5 10.de5 Ne5 11.Ne5 de5 12.Qd8+=; 9.Nbd2 h6 10.Bf6 Qf6 11.Ne4 Qd8 12.Rd1+=) 9...h6 10.Bh4 e5 11.Nc3 Ba5 12.Kd1+=; B4) 8...Nbd7 9.Nc3 (9.Nbd2 e5 10.c5 Ba5 11.Bf6 Nf6 12.de5–/+; 9.e4 e5 10.de5 Ne5 11.Ne5 de5 12.Qd8+=) 9...h6 10.Bh4 e5 11.e3 Qe8 12.de5+=; C) 8.Nbd2 C1) 8...e5 9.c5 (9.e3 h6 10.Bh4 ed4 11.Nd4 Bd4 12.ed4+=) 9...Ba5 10.de5 de5 11.Ne5 Bc3 12.Nec4=; C2) 8...Nc6 9.e3 (9.d5 Nb8 10.e3 Nbd7 11.Be2 h6 12.Bh4=) 9...h6 10.Bf6 Qf6 11.Bd3 Qe7 12.0-0=; C3) 8...Ba5 9.e3 (9.Rc1 h6 10.Bf6 Qf6 11.e3 e5 12.Bd3=; 9.Rb1 Nbd7 10.e3 e5 11.Be2 e4 12.Ng1=) 9...Nbd7 10.Bd3 h6 11.Bh4 Qc7 12.Rb1+=; C4) 8...h6 9.Bf6 (9.Bf4 Nc6 10.e3 Ba5 11.Bg3 e5 12.d5+=) 9...Qf6 10.e3 e5 11.Rc1 Nd7 12.Nb3+=; D) 8.e3 D1) 8...Ba5 9.Nbd2 (9.Nfd2 e5 10.Be2 ed4 11.ed4 Nc6 12.d5=) 9...Nbd7 10.Bd3 h6 11.Bh4 e5 12.0-0+=; D2) 8...h6 9.Bf6 (9.Bh4 Ba5 10.Nbd2 e5 11.Qc2 Re8 12.de5=) 9...Qf6 10.Bd3 e5 11.Nc3 Ba5 12.Rc1=.

6.c4 0-0 7.Bg5 h6 A) 8.Bd2 A1) 8...Nc6 9.e3 (9.Bb4 d6 10.e3 Re8 11.Be2 e5 12.d5=) 9...d5 10.Nc3 Bc7 11.cd5 ed5 12.Bd3=; A2) 8...Bc7 9.e3 (9.Nc3 d5 10.e3 Nc6 11.Rc1 a6 12.c5=; 9.Bb4 Re8 10.e3 Nc6 11.Be2 d5 12.0-0=) 9...Nc6 10.Bd3 d5 11.cd5 Nd5 12.0-0=; A3) 8...Re8 9.e3 (9.c5 Bc7 10.Nc3 e5 11.de5 Be5 12.Ne5=; 9.Bc3 d6 10.e3 Nc6 11.Bd3 e5 12.d5=) 9...d6 10.Bc3 Nc6 11.Bd3 e5 12.d5=; A4) 8...d6 9.Bc3 (9.Bb4 Re8 10.e3 Nc6 11.Be2 e5 12.d5=; 9.e3 Nc6 10.Nc3 e5 11.d5 Na5 12.Na4=) 9...Ne4 10.e3 Nc3 11.Nc3 Ba5 12.Rc1=; B) 8.Bh4 B1) 8...d6 9.Ra2 (9.Qd3 e5 10.Nc3 Nbd7 11.e3 Qe8 12.de5+=; 9.e3 Ba5 10.Nbd2 e5 11.Qc2 Re8 12.de5=) 9...g5 10.Bg3 g4 11.Nfd2 Bd4 12.e3=; B2) 8...g5 9.Bg3 Ba5 10.Nfd2 Qb6 11.Ra2 Qd4 12.e3+=; B3) 8...Nc6 9.e3 d6 10.Bd3 e5 11.d5 Nb8 12.Nbd2=; B4) 8...Ba5 9.Nbd2 g5 10.Bg3 g4 11.Ne5 Ne4 12.Bf4+=; C) 8.Bc1 C1) 8...Nc6 9.e3 d6 10.Be2 e5 11.0-0 Bg4 12.Bb2=; C2) 8...d6 9.e3 Nc6 10.Be2 e5 11.0-0 Bg4 12.Bb2=; C3) 8...Bc7 9.Nbd2 (9.e3 Nc6 10.Nbd2 d6 11.Bd3 d5 12.0-0=; 9.Nc3 d5 10.e3 Nc6 11.Rb1 Re8 12.Be2=) 9...d5 10.e3 Nc6 11.Rb1 Ne4 12.Ne4=; C4) 8...d5 9.e3 (9.cd5 ed5 10.e3 Bf5 11.Bb5 Nc6 12.0-0=; 9.Bd2 Nc6 10.e3 Bc7 11.cd5 ed5 12.Bd3=) 9...Nc6 10.Nbd2 Bc7 11.Rb1 Rb8 12.cd5=; D) 8.Bf4 d6 9.e3 (9.Qd3 Nc6 10.e3 Ba5 11.Nbd2 e5 12.de5+=; 9.Nc3 Nc6 10.d5 ed5 11.Nd5 Ne4 12.Nb6+=) 9...Nh5 10.Bg3 Ba5 11.Nbd2 e5 12.Bd3=; E) 8.Bf6 E1) 8...Qf6 9.e3 (9.Nc3 Ba5 10.Rc1 d6 11.e3 e5 12.Be2=; 9.Qd2 Nc6 10.e3 e5 11.Ne5 Ne5 12.de5+=) 9...Ba5 10.Nbd2 Nc6 11.Bd3 Bc3 12.Rb1+=; E2) 8...Ba5 9.Nbd2 (9.Nfd2 Qf6 10.e3 e5 11.de5 Qe5 12.Ra2+=) 9...Qf6 10.e3 b6 11.Bd3 Bb7 12.0-0=.

6.e3 0-0 7.Bd3 Ba5 A) 8.Bd2 A1) 8...d5 9.0-0 (9.Ba5 Qa5 10.Qd2 Qc7 11.0-0 Nc6 12.Nc3=; 9.Ne5 Nbd7 10.0-0 Ne5 11.de5 Nd7 12.Qg4=) 9...Nc6 10.Ba5 Qa5 11.Qd2 Qc7 12.Nc3=; A2) 8...d6 9.0-0 (9.c4 e5 10.Ba5 Qa5 11.Qd2 Qc7 12.Nc3=; 9.Ba5 Qa5 10.Nbd2 b6 11.0-0 Ba6 12.c4+=) 9...Nc6 10.Ba5 Qa5 11.Nbd2 Qh5 12.c4+=; A3) 8...Qb6 9.Ba5 (9.Nc3 Qc6 10.Ne2 Bd2 11.Qd2 d6 12.0-0+=; 9.Ra2 d6 10.c4 Nc6 11.0-0 e5 12.c5=) 9...Qa5 10.Nbd2 d6 11.0-0 Qc7 12.Rb1+=; A4) 8...Nc6 9.0-0 (9.Ba5 Qa5 10.Qd2 Qh5 11.c4 d5 12.0-0=; 9.c4 Bc7 10.Nc3 d5 11.cd5 ed5 12.0-0=) 9...d5 10.Ba5 Qa5 11.Qd2 Qc7 12.Nc3=; B) 8.Nbd2 B1) 8...Nc6 9.c4 (9.Bb2 d5 10.0-0 Qd6 11.c4 Bd7 12.Rc1+=; 9.0-0 d5 10.Bb2 Qd6 11.c4 Rd8 12.Ne5+=) 9...d5 10.0-0 Bc3 11.Rb1 e5 12.cd5+=; B2) 8...d5 9.0-0 (9.Bb2 b5 10.0-0 a6 11.a4 ba4 12.c4+=) 9...a6 10.c4 Bc3 11.Rb1 dc4 12.Nc4+=; B3) 8...a6 9.c4 (9.0-0 d5 10.c4 Nc6 11.Rb1 Bd2 12.Bd2+=; 9.Rb1 Nd5 10.Bb2 Nc3 11.Bc3 Bc3 12.Qe2+=) 9...d5 10.0-0 Nc6 11.Rb1 Bd2 12.Bd2+=; B4) 8...Bc3 9.Ra2 (9.Rb1 b6 10.Bb2 Bb2 11.Rb2 Qe7 12.Qa1+=) 9...Qb6 10.0-0 d5 11.Nb3 Qc7 12.Bd2+=.

6.e3 0-0 7.Bd3 Nc6 8.0-0 (8.Ne5 A) 8...d6 9.Nc6 bc6 10.Bb2 Rb8 11.Nd2 c5 12.dc5=; B) 8...Bc7 9.Bb2 (9.f4 d6 10.Nc6 bc6 11.0-0 Rb8 12.c3= ; 9.Nc6 dc6 10.Bb2 Rb8 11.e4 b5 12.Nd2=) 9...d6 10.Nc6 bc6 11.Nd2 e5 12.0-0=; C) 8...Rb8 9.0-0 (9.Nc6 bc6 10.Nd2 Bc7 11.Nf3 d6 12.0-0=; 9.c4 d6 10.Nc6 bc6 11.0-0 e5 12.de5+=) 9...d6 10.Nc6 bc6 11.Nd2 c5 12.Rb1=; D) 8...d5 9.Nf3 (9.f4 Ne4 10.Qh5 f6 11.Nc6 bc6 12.0-0=; 9.Nc6 bc6 10.0-0 Rb8 11.a4 Re8 12.Nd2+=) 9...Bc7 10.0-0 e5 11.de5 Ne5 12.Nbd2=; 8.c4 A) 8...Ba5 9.Nbd2 (9.Bd2 Bc7 10.0-0 d5 11.cd5 ed5 12.Qb3=) 9...d6 10.0-0 e5 11.Ne4 Bg4 12.Rb1=; B) 8...d6 9.Bb2 (9.0-0 e5 10.d5 Na5 11.Nbd2 Bg4 12.h3=; 9.Nc3 Ba5 10.Bd2 e5 11.d5 Ne7 12.0-0=) 9...Ba5 10.Nbd2 Bd7 11.0-0 Rc8 12.Rb1+=; C) 8...Bc7 9.Nbd2 (9.0-0 d5 10.cd5 ed5 11.Nc3 Bg4 12.h3=; 9.Nc3 d5 10.cd5 ed5 11.Rb1 Rb8 12.0-0=) 9...d6 10.0-0 d5 11.Rb1 Qe7 12.e4+=; D) 8...d5 9.Nbd2 (9.0-0 dc4 10.Bc4 Bc7 11.Nc3 a6 12.a4=; 9.cd5 ed5 10.0-0 Ne4 11.Bb2 Bg4 12.Nc3=) 9...Bc7 10.0-0 dc4 11.Nc4 b6 12.Rb1=; 8.Nbd2 A) 8...d5 9.0-0 (9.c4 Bc7 10.0-0 dc4 11.Nc4 b6 12.Qb3=; 9.Bb2 Bc7 10.0-0 a6 11.Ne5 Bd7 12.Qf3=) 9...Bd7 10.c4 Bc7 11.Rb1 b6 12.e4+=; B) 8...Ba5 9.c4 (9.0-0 d5 10.Bb2 Qd6 11.c4 Bd7 12.Rc1+=; 9.Bb2 d5 10.0-0 Bd7 11.c4 Rc8 12.Rc1+=) 9...d5 10.0-0 Bc3 11.Rb1 e5 12.cd5+=; C) 8...Bc7 9.c4 (9.Rb1 d5 10.0-0 b6 11.e4 e5 12.de5=; 9.0-0 d5 10.c4 dc4 11.Nc4 b6 12.Qe2=) 9...Re8 10.e4 Nh5 11.0-0 Nf4 12.Bc2=; D) 8...d6 9.c4 (9.Nc4 Bc7 10.0-0 e5 11.de5 de5 12.e4=; 9.Bb2 Re8 10.Nc4 Bc7 11.0-0 a6 12.Rb1=) 9...e5 10.d5 Ne7 11.0-0 Qc7 12.Rb1=) 8...d6 (8...d5 9.Nbd2 (9.Bb2 Bc7 10.Nbd2 a6 11.Ne5 Bd7 12.Qf3=; 9.c4 dc4 10.Bc4 Bc7 11.Nc3 a6 12.Qc2=) 9...Bc7 10.c4 dc4 11.Nc4 b6 12.Rb1=; 8...Bc7 9.e4 (9.Nbd2 d5 10.Rb1 a6 11.e4 Nh5 12.g3=; 9.Bb2 d5 10.Nbd2 a6 11.Ne5 Bd7 12.Nd7=) 9...d5 10.e5 Ne4 11.Re1 f5 12.ef6+=; 8...Qc7 9.Nbd2 (9.c4 d6 10.Nc3 Ba5 11.Bd2 Bc3 12.Bc3+=; 9.Bb2 d5 10.Nbd2 Rd8 11.c4 Qe7 12.Qc2+=) 9...d5 10.Bb2 Rd8 11.c4 Qe7 12.Rc1+=) 9.Bb2 (9.c4 e5 10.Nc3 ed4 11.Nd4 Ne5 12.Be2=; 9.Nbd2 e5 10.Bb2 Re8 11.de5 de5 12.Qb1=; 9.Qe2 e5 10.de5 de5 11.Nc3 Qe7 12.Ng5=) 9...Re8 (9...d5 10.Nbd2 Bd7 11.c4 Rc8 12.Rc1+=) 10.e4 (10.c4 e5 11.d5 Ne7 12.Nc3=) 10...e5 11.d5 Ne7 12.Nbd2 (12.Bb5=) 12...Bg4 13.Bb5 Rf8 14.h3 Bh5 15.Qe2 (15.g4 Bg6 16.Nh4 Rc8=) 15...Rc8 16.Rfc1 Ng6 17.Qd3 Nf4 18.Qb3 a6 (18...Nd7 19.Qb4 Nc5 20.a4–/+) 19.Bf1 Qd7?? (better is 19...Nd7 20.g3 Nc5–/+) 20.Qb6+– Rb8 (20...Bf3 21.gf3 Ne8+–) 21.Ne5! de5 22.Be5 Rbe8 (22...Ne2 23.Be2 Be2 24.Qe3+–) 23.Bf4 Ne4 24.Ne4 (24.c4 f5+–) 24...Re4 25.Bd6 Rfe8 (25...Rd8 26.Bc7 Rde8 27.Bd3+–) 26.Bd3 Rh4 27.Re1 Re1 (27...f5+–) 28.Re1 f6 29.Bf5 Qa4 30.Qd8 Kf7 (30...Be8 31.Re8 Qe8 32.Qe8) 31.Qf8 1–0. pozarski (1995) – Arien3, GameColony.com, 2002.

6.e3 0-0 7.Bd3 d5 A) 8.0-0 A1) 8...Nc6 9.Qe2 (9.Nbd2 Bc7 10.Rb1 b6 11.Re1 Re8 12.e4=) 9...Bc7 10.Nbd2 e5 11.de5 Ne5 12.Bb2=; A2) 8...Re8 9.Bb2 (9.Nbd2 Nc6 10.Rb1 Bc7 11.c4 e5 12.de5=; 9.c4 dc4 10.Bc4 Nc6 11.Nc3 Bd7 12.Nb5=) 9...Nc6 10.Nbd2 Bc7 11.Ne5 Ne5 12.de5+=; A3) 8...Ba5 9.Bb2 (9.Nbd2 Nc6 10.Bb2 Bd7 11.c4 Rc8 12.Rc1+=; 9.Bd2 Bc7 10.Bb4 Re8 11.Ne5 Nc6 12.f4=) 9...Nc6 10.Nbd2 Qd6 11.c4 Rd8 12.Rc1+=; A4) 8...Bc7 9.Nbd2 (9.c4 dc4 10.Bc4 Nc6 11.Nc3 a6 12.a4=; 9.a4 Nc6 10.Nbd2 e5 11.de5 Ne5 12.Bb2=) 9...Nc6 10.c4 dc4 11.Nc4 b6 12.Rb1=; B) 8.Bb2 B1) 8...a6 9.Ne5 (9.Nbd2 Bc7 10.Ne5 Bd7 11.Qf3 Nc6 12.0-0=; 9.0-0 Nc6 10.Nbd2 Bc7 11.Ne5 Bd7 12.Qf3=) 9...Bc7 10.0-0 Nc6 11.Nd2 Bd7 12.Nd7=; B2) 8...Nc6 9.Nbd2 (9.0-0 Bc7 10.c4 dc4 11.Bc4 Bd7 12.Nc3=; 9.c4 Ba5 10.Nbd2 dc4 11.Bc4 a6 12.0-0=) 9...Bd7 10.c4 Bc7 11.0-0 Rc8 12.Rc1=; B3) 8...Bd7 9.Nbd2 (9.0-0 Nc6 10.c4 dc4 11.Bc4 Rc8 12.Bd3=; 9.Ne5 Nc6 10.Nd2 Bc7 11.0-0 b5 12.e4=) 9...Ba4 10.0-0 Nc6 11.Qe2 Rc8 12.c4=; B4) 8...Bc7 9.Nbd2 (9.0-0 b6 10.Nbd2 Nc6 11.Rc1 Bb7 12.c4=; 9.Ne5 Nfd7 10.0-0 Ne5 11.de5 Nc6 12.Nd2=) 9...Nbd7 10.0-0 a6 11.a4 b6 12.c4=; C) 8.Qe2 C1) 8...Bc7 9.Bb2 (9.Nbd2 Nbd7 10.0-0 e5 11.de5 Ne5 12.Bb2=; 9.0-0 Nc6 10.Nbd2 e5 11.de5 Ne5 12.Bb2=) 9...Bd6 10.0-0 Bd7 11.Nbd2 Nc6 12.c4+=; C2) 8...Re8 9.Nbd2 (9.Bb2 Nc6 10.0-0 Bc7 11.Nbd2 Bd7 12.c4=; 9.0-0 Bc7 10.c4 Nc6 11.Bb2 Bd7 12.Nbd2=) 9...Ba5 10.Bb2 a6 11.0-0 b5 12.a4+=; C3) 8...Nc6 9.Nbd2 (9.c4 dc4 10.Bc4 Na5 11.Ba2 Bd7 12.0-0=; 9.0-0 Ba5 10.c4 dc4 11.Bc4 Bd7 12.Bd3=) 9...Re8 10.Bb2 Bc7 11.c4 h6 12.0-0+=; C4) 8...Ba5 9.Nbd2 (9.Bd2 Nc6 10.Ba5 Qa5 11.Nbd2 Re8 12.0-0=; 9.c3 Nc6 10.0-0 a6 11.Rd1 Rb8 12.a4=) 9...Ne4 10.0-0 Nc3 11.Qe1 Ne4 12.c4=; D) 8.c4 D1) 8...Bc7 9.Nbd2 (9.cd5 ed5 10.0-0 Nc6 11.Nc3 Bg4 12.h3=; 9.0-0 dc4 10.Bc4 Nc6 11.Nc3 a6 12.a4=) 9...dc4 10.Nc4 Nc6 11.Qc2 Qd5 12.e4+=; D2) 8...Ba5 9.Bd2 (9.Nbd2 dc4 10.Bc4 a6 11.a4 Bd7 12.0-0=) 9...dc4 10.Bc4 a6 11.Ba5 Qa5 12.Qd2=; D3) 8...Nc6 9.Nbd2 (9.cd5 ed5 10.Nc3 Bg4 11.h3 Ba5 12.Bd2=; 9.0-0 dc4 10.Bc4 a6 11.Qc2 Bd7 12.Bd3=) 9...Bc7 10.0-0 dc4 11.Nc4 b5 12.Ncd2+=; D4) 8...dc4 9.Bc4 Nc6 10.0-0 Bc7 11.Nc3 a6 12.a4=; E) 8.Nbd2 E1) 8...Nc6 9.c4 (9.0-0 Bc7 10.Rb1 Qe7 11.e4 e5 12.Re1+=; 9.Rb1 Bc7 10.c4 e5 11.cd5 Nd5 12.Ne5=) 9...dc4 10.Nc4 Bc7 11.Qc2 Bd7 12.Rb1+=; E2) 8...Ba5 9.0-0 (9.Bb2 a6 10.0-0 Bc7 11.Rb1 b5 12.a4=; 9.c4 dc4 10.Bc4 a6 11.a4 Bd7 12.0-0=) 9...a6 10.c4 Nc6 11.Rb1 Bd2 12.Bd2+=; E3) 8...Bd7 9.0-0 (9.c4 dc4 10.Nc4 Bc7 11.Nce5 Bc6 12.Nc6=; 9.Rb1 Nc6 10.c4 Rb8 11.0-0 Bc7 12.Qc2=) 9...Nc6 10.c4 Bc7 11.Rb1 Rb8 12.Qc2+=; E4) 8...Bc7 9.0-0 (9.Rb1 Nc6 10.c4 e5 11.cd5 Nd5 12.Ne5=; 9.c4 Nc6 10.0-0 dc4 11.Nc4 b6 12.Rb1=) 9...Nc6 10.Rb1 Qe7 11.e4 e5 12.Re1+=.

6.e3 0-0 7.Bd3 d6 A) 8.0-0 A1) 8...Nc6 9.c4 (9.Bb2 Qe7 10.c4 e5 11.d5 Nb8 12.Nbd2=; 9.Nc3 Ba5 10.Bd2 e5 11.de5 de5 12.Ne4=) 9...e5 10.d5 Ne7 11.Nc3 Bg4 12.h3=; A2) 8...Re8 9.e4 (9.c4 e5 10.c5 Ba5 11.Bb5 Bd7 12.Qb3=; 9.Bb2 Nc6 10.e4 e5 11.d5 Ne7 12.Bc1=) 9...e5 10.d5 Nbd7 11.Nbd2 Nc5 12.Qe2=; B) 8.Bb2 B1) 8...Bd7 9.c4 (9.0-0 Nc6 10.Nbd2 Re8 11.c4 e5 12.Qc2=; 9.Nbd2 Nc6 10.0-0 Re8 11.c4 e5 12.Qc2=) 9...Nc6 10.0-0 Re8 11.Nc3 e5 12.Nb5+=; B2) 8...d5 9.Nbd2 (9.0-0 Nc6 10.Nbd2 Bd7 11.c4 Rc8 12.Rc1+=; 9.c4 dc4 10.Bc4 Nc6 11.0-0 Bc7 12.Bd3=) 9...Ba5 10.0-0 b5 11.Ne5 Bb7 12.Rb1+=; B3) 8...Bc7 9.Nbd2 (9.0-0 Nc6 10.Nbd2 d5 11.c4 Bd7 12.Rc1+=; 9.e4 Nc6 10.0-0 d5 11.e5 Nd7 12.c4=) 9...Nc6 10.0-0 d5 11.c4 Bd7 12.Rc1+=; B4) 8...Nc6 9.Nbd2 (9.c4 Re8 10.0-0 e5 11.d5 Nb8 12.Bc2=; 9.0-0 Qe7 10.c4 e5 11.d5 Nb8 12.Nbd2=) 9...Re8 10.Nc4 Bc7 11.0-0 Rb8 12.Rb1=; C) 8.c4 C1) 8...Re8 9.Bb2 (9.0-0 e5 10.c5 Ba5 11.Bb5 Bd7 12.Qb3=) 9...Ba5 10.Nfd2 Nc6 11.0-0 e5 12.d5=; C2) 8...Nc6 9.0-0 (9.Bb2 Re8 10.0-0 e5 11.d5 Nb8 12.Bc2=; 9.Nbd2 e5 10.d5 Ne7 11.Qc2 Bd7 12.Qb3=) 9...e5 10.d5 Na5 11.Nbd2 Re8 12.Qc2=; C3) 8...Ba5 9.Nbd2 (9.Bd2 e5 10.Ba5 Qa5 11.Qd2 Qc7 12.Nc3=; 9.Nfd2 Nc6 10.0-0 e5 11.d5 Ne7 12.Bb2=) 9...Re8 10.0-0 Nc6 11.Nb3 Bc3 12.Rb1+=; C4) 8...e5 9.de5 (9.Be2 Ba5 10.Bd2 e4 11.Ba5 Qa5 12.Nfd2=) 9...de5 10.Ne5 Ba5 11.Kf1 Na6 12.Bb2=; D) 8.c3 D1) 8...e5 9.de5 (9.Nbd2 Nc6 10.Qc2 Qe7 11.d5 Nd5 12.Bh7=; 9.Qc2 Nc6 10.Nbd2 Qe7 11.d5 Nd5 12.Bh7=) 9...de5 10.Ne5 Re8 11.Nf3 Nc6 12.Qc2+=; D2) 8...Qc7 9.Qc2 (9.e4 e5 10.Bg5 Nbd7 11.0-0 d5 12.Ne5=; 9.0-0 e5 10.e4 Bg4 11.Be3 Nbd7 12.Re1=) 9...e5 10.Nbd2 Bg4 11.0-0 Re8 12.Ng5=; D3) 8...d5 9.Nbd2 (9.0-0 Ba5 10.Qc2 Bd7 11.Nbd2 Qc7 12.c4=; 9.Qb3 Nc6 10.Nbd2 Bd7 11.Qb2 Bc7 12.0-0=) 9...Ba5 10.Qb3 Nc6 11.0-0 Bc7 12.c4=; D4) 8...Qe7 9.Qc2 (9.Nbd2 e5 10.Qc2 Bg4 11.Ne4 Nbd7 12.Nf6+=; 9.e4 e5 10.d5 Nbd7 11.0-0 Nc5 12.Qc2=) 9...e5 10.Nbd2 Nc6 11.d5 Nd5 12.Bh7=; E) 8.Nbd2 E1) 8...Ba5 9.Bb2 (9.0-0 Bc3 10.Rb1 e5 11.Bb2 Bb2 12.Rb2=; 9.c4 Qc7 10.0-0 e5 11.Rb1 Re8 12.Qc2=) 9...Bc7 10.0-0 Nc6 11.c4 Qe7 12.Qc2+=; E2) 8...Nc6 9.Bb2 (9.Nc4 Bc7 10.0-0 e5 11.de5 de5 12.e4=; 9.c4 e5 10.d5 Ne7 11.0-0 Qc7 12.Qc2=) 9...Re8 10.Nc4 Bc7 11.0-0 Qe7 12.Re1=; E3) 8...Bd7 9.Rb1 (9.0-0 Nc6 10.Rb1 e5 11.de5 de5 12.Bb2=; 9.c4 Nc6 10.Bb2 Re8 11.0-0 e5 12.Qc2=) 9...Bc6 10.0-0 Nbd7 11.c4 Qc7 12.e4+=; E4) 8...Re8 9.Nc4 (9.e4 e5 10.d5 Nbd7 11.0-0 Nc5 12.Qe2=) 9...Bc7 10.0-0 Nc6 11.Rb1 e5 12.d5=.

6.Bf4 d5 7.e3 Bd7 8.Bd3 Nc6 9.0-0 0-0 10.c4 dc4 11.Bc4 h6 12.Nc3 Re8 13.Qb1 (13.Rc1!?+=) 13...Rc8= 14.Qd3 Bc7 15.Bc7 Qc7 16.Nb5 Qb8 17.Rfc1 a6 18.Nc3 e5 19.Nd5 e4 20.Nf6 gf6 21.Qb3 Re7? (better is 21...ef3!? 22.Bf7 Kh8 23.Be8 Re8+=) 22.Nd2+/– f5 23.Qb6 Qa7 24.Qb2 b5 25.Ba2 Ree8 26.a4 Ne7 (26...ba4 27.Qa3 Nd4 28.ed4 Rc1 29.Rc1 Qd4 30.Qg3 Kf8 31.Nf1+=) 27.Qa3 ba4 28.Qd6 (28.Nc4!? Kg7 29.Nd6 Rc1 30.Rc1+–) 28...Ng6?? (28...Qb7 29.Qg3 Kf8=) 29.Qg6+– 1–0. capablancaven – dynamind795 (1700), gameknot.com, 2011.

6.Bg5 h6 7.Bc1 A) 7...d5 A1) 8.Bd2 Nc6 (8...0-0 9.e3 Nc6 10.Bd3 Bc7 11.0-0 Qd6=; 8...Bc7 9.e3 Nc6 10.Bd3 0-0 11.0-0 Re8=) 9.e3 0-0 10.Bd3 Bc7 11.0-0 Qd6=; A2) 8.e3 Nc6 (8...0-0 9.Bd3 Nc6 10.0-0 Bc7 11.Nbd2 e5=; 8...Ne4 9.Bd3 Ba5 10.Nfd2 0-0 11.0-0 Bc7=) 9.Bd3 Ba5 10.Bd2 Bc7 11.0-0 0-0=; B) 7...Nc6 B1) 8.c4 d6 (8...0-0 9.e3 d6 10.Be2 e5 11.0-0 Bg4=; 8...d5 9.e3 0-0 10.Bd3 dc4 11.Bc4 Bc7=) 9.e3 e5 10.d5 Ne7 11.Nc3 Bf5=; B2) 8.e3 d5 (8...0-0 9.Nbd2 Ba5 10.Bd3 Qc7 11.0-0 d5=; 8...d6 9.Bb5 a6 10.Be2 Ba5 11.Bd2 e5=) 9.Bd3 Ba5 10.Bd2 Bc7 11.0-0 0-0=; C) 7...Bc7 C1) 8.e3 0-0 (8...d5 9.Bd3 Nc6 10.0-0 Bd6 11.Nbd2 0-0=; 8...Nc6 9.Bd3 d5 10.0-0 a6 11.Nbd2 b5=) 9.Bd3 d5 10.Nbd2 Nbd7 11.0-0 e5=; C2) 8.Nbd2 Nc6 (8...Ba5 9.e3 Nc6 10.Bb2 d5 11.Bd3 a6=; 8...d5 9.e3 Nc6 10.Bd3 Ba5 11.0-0 Bc3+=) 9.e3 0-0 10.Bd3 d5 11.0-0 Ng4=; D) 7...Ba5 8.Bd2 Nc6 (8...d6 9.e3 Nc6 10.Ba5 Qa5 11.Qd2 Qd8=; 8...Qb6 9.Ba5 Qa5 10.Qd2 Qc7 11.e3 b6=) 9.e3 d6 10.Ba5 Qa5 11.Qd2 Qh5=; E) 7...0-0 E1) 8.c4 d5 (8...Nc6 9.e3 d6 10.Be2 e5 11.0-0 Bg4=; 8...d6 9.e3 Nc6 10.Be2 e5 11.0-0 Bg4=) 9.e3 Nc6 10.cd5 ed5 11.Bd3 Ne4=; E2) 8.Bd2 Nc6 (8...d6 9.e3 Nc6 10.Bb5 a6 11.Be2 e5+=; 8...Re8 9.e3 d6 10.Bb5 Bd7 11.c4 Bb5=) 9.e3 d6 10.Bb5 a6 11.Be2 e5+=; E3) 8.Qd3 d6 (8...Nc6 9.Nbd2 d6 10.e3 e5 11.Bb2 Qe7=; 8...d5 9.e3 Bc7 10.Be2 Nc6 11.Nbd2 a6=) 9.e4 e5 10.Nbd2 d5 11.de5 Ng4+=; E4) 8.e3 Nc6 (8...d6 9.Bd3 Nc6 10.Bb2 Re8 11.Nc3 Ba5=; 8...d5 9.Bd3 Bc7 10.0-0 Nc6 11.Nbd2 Ng4=) 9.Nbd2 d6 10.Bb2 Re8 11.Be2 e5=.

6.Bg5 h6 7.Bd2 A) 7...0-0 A1) 8.c4 d6 (8...Nc6 9.e3 d5 10.Nc3 Re8 11.c5 Bc7=; 8...Bc7 9.e3 Nc6 10.Bd3 d5 11.cd5 ed5=) 9.e3 Nc6 10.Bc3 Qc7 11.Bd3 e5=; A2) 8.Bb4 d6 (8...Re8 9.e3 d6 10.Bb5 Bd7 11.Be2 Qc7=) 9.e3 Nc6 10.Bb5 a6 11.Bc4 Qc7+=; A3) 8.Ra2 Re8 (8...d6 9.e3 Nc6 10.c4 e5 11.d5 Ne7+=; 8...Nc6 9.e3 d6 10.c4 e5 11.d5 Na5+=) 9.e3 d6 10.c4 e5 11.Bb4 Nc6+=; A4) 8.e3 d5 (8...d6 9.c4 Nc6 10.Nc3 Re8 11.Be2 e5=; 8...Nc6 9.c4 d5 10.Nc3 Re8 11.c5 Bc7=) 9.Bd3 Nc6 10.0-0 Bc7 11.Nc3 e5=; B) 7...d6 B1) 8.Bb4 0-0 (8...Nc6 9.e3 e5 10.Bb5 Bd7 11.Bd6 Ba5=; 8...a5 9.Bc3 0-0 10.e3 Nc6 11.Bd3 Re8=) 9.e3 Nc6 10.Bb5 a6 11.Bc4 Qe7+=; B2) 8.Bc3 Ne4 (8...0-0 9.e3 Nc6 10.Bd3 Re8 11.e4 e5=; 8...Qc7 9.e3 Nbd7 10.Bb5 a6 11.Bd3 e5=) 9.Bb4 a5 10.Bd2 e5 11.e3 ed4=; B3) 8.c4 e5 (8...Nbd7 9.Bb4 e5 10.e3 Bc7 11.Be2 a5=; 8...Nc6 9.e3 e5 10.d5 Na5 11.Nc3 0-0=) 9.c5 dc5 10.de5 Nfd7 11.e4 Bc7=; B4) 8.e3 0-0 (8...Nc6 9.Bb5 0-0 10.0-0 Bd7 11.c4 Rc8=; 8...Qe7 9.Bd3 e5 10.de5 de5 11.Bb4 Bc5=) 9.Bd3 Qe7 10.Bb4 Nc6 11.c4 Nb4=; C) 7...d5 C1) 8.e3 Nc6 (8...0-0 9.Bb4 Re8 10.Bd3 Nc6 11.Nbd2 Bc7=; 8...Bc7 9.Bd3 Nc6 10.0-0 0-0 11.Bb4 Nb4=) 9.Bd3 Bc7 10.0-0 0-0 11.Nc3 e5=; C2) 8.Ra2 0-0 (8...Nc6 9.e3 0-0 10.Bd3 Bc7 11.0-0 Qd6=; 8...Bc7 9.e3 Nc6 10.Bd3 0-0 11.0-0 Qd6=) 9.e3 Nc6 10.Bd3 Bc7 11.Rb2 Bd6=; C3) 8.c4 0-0 (8...Nc6 9.e3 Bc7 10.Nc3 0-0 11.Rc1 a6=; 8...Bc7 9.e3 Nc6 10.Nc3 0-0 11.Rc1 a6=) 9.e3 Nc6 10.Nc3 Bc7 11.Rc1 a6=; D) 7...Bc7 D1) 8.e3 d5 (8...Nc6 9.Bd3 d5 10.0-0 0-0 11.c4 dc4=; 8...0-0 9.Bb4 d6 10.Bd3 Nc6 11.0-0 a5=) 9.Bd3 Nc6 10.0-0 0-0 11.Nc3 e5=; D2) 8.Nc3 d5 9.e3 a6 10.Bd3 0-0 11.0-0 Nc6=; D3) 8.Bc1 0-0 (8...d5 9.e3 Nc6 10.Bd3 0-0 11.Nbd2 Ba5=; 8...Nc6 9.e3 0-0 10.Bd3 d5 11.Nbd2 Ba5=) 9.e3 d6 10.Bd3 e5 11.Nbd2 Qe7=; D4) 8.c4 Nc6 (8...0-0 9.Nc3 d5 10.e3 Nc6 11.cd5 ed5=; 8...d5 9.e3 0-0 10.Nc3 Nc6 11.cd5 ed5=) 9.e3 d5 10.Nc3 0-0 11.Rc1 a6=; E) 7...Nc6 8.e3 d5 (8...0-0 9.Bd3 d6 10.Nc3 Ba5 11.e4 Bb6=; 8...d6 9.Bb5 0-0 10.0-0 Bd7 11.c4 Rc8=) 9.Bd3 0-0 10.0-0 Bc7 11.Nc3 e5=.

6.Bg5 h6 7.Bf4 A) 7...Ba5 A1) 8.c3 d6 (8...Nc6 9.Qc2 d5 10.e3 Ne4 11.h4 Bd7=; 8...Qb6 9.Qc2 d6 10.Nfd2 e5 11.de5 Ng4=) 9.Qd3 Qb6 10.Ra2 Bd7 11.e4 Qb3+=; A2) 8.Bd2 Nc6 (8...d6 9.e3 Nc6 10.Ba5 Qa5 11.Qd2 Qd8=; 8...Ne4 9.Ba5 Qa5 10.Nbd2 Qc3 11.e3 Nd2=) 9.e3 d6 10.c4 0-0 11.Bd3 e5=; B) 7...Nc6 B1) 8.e3 Ba5 (8...d6 9.c3 Ba5 10.Qb3 Nh5 11.Bg3 Ng3=; 8...g5 9.Bd6 Ne4 10.Bb4 a5 11.Bc3 d5=) 9.Nbd2 Bc3 10.Rb1 g5 11.Bg3 Ne4+=; B2) 8.Qd3 d6 (8...g5 9.Bd6 g4 10.Ne5 Nd4 11.e4 Nc6=; 8...d5 9.e3 Ba5 10.c3 0-0 11.Be2 Nh5+=) 9.e4 e5 10.de5 de5 11.Bg3 Qc7+=; B3) 8.c3 d6 (8...Ba5 9.Qc2 d5 10.e3 a6 11.Bd3 Nh5=; 8...d5 9.Ne5 Ne5 10.Be5 Bc7 11.Bc7 Qc7=) 9.e3 Ba5 10.Qb3 Nh5 11.Bg3 Ng3=; C) 7...d5 C1) 8.Nbd2 Ba5 (8...0-0 9.e3 Ba5 10.c4 Nc6 11.Rc1 Nh5=; 8...Nc6 9.e3 Ba5 10.Bb5 Ne4 11.c4 g5–/+) 9.e3 Ne4 10.Bb5 Nc6 11.c4 g5–/+; C2) 8.Qd3 Nc6 (8...Ba5 9.Bd2 Bc7 10.Nc3 Nc6 11.e4 de4=; 8...g5 9.Bg3 Ne4 10.e3 Ba5 11.c3 Nc6+=) 9.e3 Ba5 10.c3 0-0 11.Be2 Nh5+=; C3) 8.e3 Nc6 (8...Ba5 9.c3 0-0 10.Bd3 Nc6 11.Ne5 Qb6=; 8...0-0 9.Nbd2 Ba5 10.c4 Bc3 11.Ra2 Ne4=) 9.Nbd2 Ba5 10.Bd3 0-0 11.Ne5 Ne5=; D) 7...g5 D1) 8.Be5 d6 (8...Nc6 9.e3 d6 10.Bf6 Qf6 11.c3 d5=; 8...g4 9.e3 d6 10.Bf6 Qf6 11.Nfd2 Rg8+=) 9.Bf6 Qf6 10.e3 Bd7 11.Be2 Ba5=; D2) 8.Bg3 Ne4 (8...Ba5 9.c3 Ne4 10.Qb3 Nc6 11.e3 d5=; 8...Nc6 9.e3 Ba5 10.Nfd2 Qb6 11.Ra2 Ne4=) 9.e3 Ba5 10.Nfd2 Ng3 11.hg3 Nc6=; D3) 8.Bc1 d6 (8...Nc6 9.e3 d6 10.Bb5 a6 11.Be2 e5=; 8...Ba5 9.Bd2 d6 10.e3 Nc6 11.Bc4 Bc7=) 9.e3 Nc6 10.Bb5 a6 11.Be2 e5=; D4) 8.Bb8 Ba5 (8...Rb8 9.e3 Ba5 10.Nfd2 Qb6 11.Qf3 Qb2=) 9.Nfd2 Rb8 10.e3 Qb6 11.Qf3 Nd5=; E) 7...d6 E1) 8.Qd3 Nc6 (8...Qc7 9.e4 e5 10.Be3 Ng4 11.c3 Be6=) 9.e4 e5 10.de5 de5 11.Bg3 Qc7+=; E2) 8.c3 Nc6 (8...Qc7 9.Qd3 e5 10.de5 de5 11.Ne5 Bf2=; 8...Ba5 9.Qc2 Qc7 10.Bd2 0-0 11.e4 e5=) 9.e3 Ba5 10.Qb3 Nh5 11.Bg3 Ng3=; E3) 8.c4 g5 (8...Nc6 9.Bc1 e5 10.d5 Nd4 11.e3 Nf3+=) 9.Bc1 g4 10.Ng1 Ne4 11.e3 Qf6+=; E4) 8.e3 Ba5 (8...Nc6 9.Bd3 Nh5 10.Bg3 Ng3 11.hg3 Ba5=; 8...Nh5 9.Bg3 Ng3 10.hg3 Qc7 11.c3 Ba5=) 9.c3 Nd5 10.Qd2 Nf4 11.ef4 Bd7=.

6.Bg5 h6 7.Bf6 Qf6 A) 8.e4 Nc6= (8...d6 9.e5 de5 10.de5 Qe7 11.Bd3 Nc6=; 8...d5 9.e5 Qe7 10.Bb5 Bd7 11.Bd7 Nd7=) 9.c3 d6 10.Nbd2 0-0 11.Rb1 e5=; B) 8.e3 Nc6 (8...0-0 9.Nbd2 Ba5 10.Rb1 Qe7 11.Rb3 d5=; 8...Ba5 9.Nbd2 0-0 10.c4 b6 11.Bd3 Bb7=) 9.Nbd2 Ba5 10.Bb5 0-0 11.0-0 Bc7=.

6.Bg5 h6 7.Bh4 d5 (7...Nc6 A) 8.c3 d5 (8...Ba5 9.e3 g5 10.Bg3 Ne4 11.Qb3 d5=; 8...g5 9.Bg3 Ba5 10.Nfd2 Nd5 11.Qb3 f5+=) 9.e3 g5 10.Bg3 Ne4 11.Bd3 Ng3=; B) 8.e3 Ba5 (8...g5 9.Bg3 Ba5 10.Nfd2 Qb6 11.Ra2 Ne4=; 8...d5 9.Bd3 0-0 10.Nbd2 Ba5 11.0-0 Bc3+=) 9.c3 g5 10.Bg3 Ne4 11.Qb3 d5=; 7...Ba5 A) 8.Nbd2 g5 (8...Nc6 9.e3 g5 10.Bg3 g4 11.Ne5 Ne4+=; 8...Bc3 9.Bf6 Qf6 10.Rb1 Bd4 11.Nd4 Qd4+=) 9.Bg3 Bc3 10.Rb1 Ne4 11.Rb3 g4+=; B) 8.c3 g5 (8...Nc6 9.e3 g5 10.Bg3 Ne4 11.Qb3 d5=; 8...d5 9.e3 g5 10.Bg3 Ne4 11.Qb3 Nc6=) 9.Bg3 Ne4 10.Qb3 Nc6 11.e3 d5=; 7...0-0 A) 8.Qd3 d5 (8...Ba5 9.Nbd2 d5 10.Rc1 Nbd7 11.e3 Nb6=; 8...Nc6 9.e3 d5 10.Nbd2 Bc7 11.Be2 Re8=) 9.Nbd2 Ba5 10.Rc1 a6 11.e3 Bd7=; B) 8.g4 Ba5 (8...d6 9.g5 hg5 10.Bg5 e5 11.Qd3 Nc6=; 8...Nc6 9.c3 d5 10.g5 hg5 11.Bg5 e5=) 9.c3 Qb6 10.Bf6 Qb2 11.Nbd2 gf6=; C) 8.c4 Ba5 (8...d6 9.e3 Ba5 10.Nbd2 e5 11.Qc2 Re8=; 8...g5 9.Bg3 Ba5 10.Nfd2 Qb6 11.Ra2 Qd4+=) 9.Nbd2 g5 10.Bg3 g4 11.Ne5 Ne4+=; D) 8.e3 d6 (8...Ba5 9.Nfd2 Qb6 10.Bf6 gf6 11.Qg4 Kh8+/–; 8...d5 9.c4 Nc6 10.Nbd2 Ba5 11.Rc1 Re8+=) 9.c3 Nc6 10.Bb5 Bc7 11.0-0 d5=; 7...g5 8.Bg3 Ne4 (8...Ba5 9.c3 Ne4 10.Qb3 Nc6 11.e3 d5=; 8...Nc6 9.e3 Ba5 10.Nfd2 Qb6 11.Ra2 Ne4=) 9.e3 Ba5 10.Nfd2 Ng3 11.hg3 Nc6=) 8.e3 (8.Qd3 g5 (8...Ba5 9.c3 Nc6 10.Bf6 Qf6 11.e4 Bd7=; 8...Nc6 9.e3 Ba5 10.c3 g5 11.Bg3 Ne4=) 9.Bg3 Ne4 10.e3 Ba5 11.c3 Nc6+=) 8...0-0 (8...Ba5 9.c3 g5 10.Bg3 Ne4 11.Qb3 Nc6=; 8...Nc6 9.Bd3 Ba5 10.c3 Qb6 11.Ra2 Bd7+=) 9.Bd3 (9.c4 Ba5 10.Nbd2 Bc3 11.Rb1 g5+=) 9...Nbd7 (9...Nc6 10.Nbd2 (10.0-0= Bc7 11.c4 dc4=) 10...Ba5 11.0-0 Bc3+=; 9...Ba5 10.c3 Nbd7 11.0-0 a6=) 10.Nbd2 (10.0-0 Bc7 11.Nbd2 e5=) 10...Re8 (10...Ba5 11.0-0 Bc3=) 11.Ne5 (11.c4 e5=) 11...Ba5 (11...Qc7+=) 12.0-0 (12.Rb1 Qc7 13.Nd7 Nd7= (13...Qd7? 14.Bb5 Qe7 15.Bf6 gf6 16.Be8 Qe8 17.0-0+–)) 12...Bd2 (12...Ne5 13.de5 Bd2 14.Bf6 gf6 15.ef6=) 13.Qd2 Ne4 (13...Ne5 14.de5 Ne4 15.Bd8 Nd2 16.Rfd1=) 14.Be4 Qh4 15.Bd3 Ne5 16.de5 Bd7 17.f4 (17.Qb4 Qb4 18.ab4 a6=) 17...Rac8 18.Rab1 b6 19.Rb4 Qe7 20.f5 (better is 20.e4!?=) 20...ef5–/+ 21.Bf5 Bf5 22.Rf5 Qe6 23.Rbf4 Rc7 24.Qf2 Rec8 25.Rf6? (better is 25.Qf3–/+) 25...gf6–+ 26.Qg3 Kf8 (better is 26...Kh7 27.Rf6 Qe7–+) 27.Rf6–/+ Qe7 28.Rh6 Ke8 29.Qg8?? (better is 29.Qh3 Qe5 30.Rh8 Ke7 31.Rc8 Rc8 32.Qc8 Qe3 33.Kf1 Qa3 34.Qc7 Ke6 35.Qc8 Ke5 36.Qe8 Kd4 37.Qh8 Kc4 38.Qc8 Qc5 39.Qd7–+) 29...Qf8–+ 30.Qh7 0–1. Tripp – Baniki, USA, 1990. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Bb6)

6.c4 0-0 7.Bg5 Nc6 8.Nc3 (8.Ra2 h6 9.Bf6 Bf6 10.e4 d5 11.e5 Be7 12.Rc2 f6 13.Be2 dc4 14.Rc4+=; 8.e3 Qa5 9.Nbd2 e5 10.de5 Ne5 11.Ne5 Qe5 12.Bf4 Qc3 13.Bg5 Rd8 14.Qc1+=; 8.Nbd2 Qa5 9.e3 e5 10.de5 Ne5 11.Ne5 Qe5 12.Bf4 Qc3 13.Ra2 Ba3 14.Rc2+=; 8.Qd3 h6 9.Bf6 Bf6 10.e4 Qa5 11.Nbd2 d5 12.cd5 ed5 13.e5 Be7 14.Be2=) 8...d5 9.Bf6 Bf6 10.e3 Qa5 11.Qd2 Be7 12.c5 b6 13.Bb5 Bd7 14.0-0=.

6.c4 b6 7.Nc3 Bb7 8.d5 Bc5 9.e4 Ng4 10.Bg5? (10.Ra2!? Qf6 11.Nb5=) 10...Nf2 11.Bd8 Nd1 12.Rd1 (12.Na4!? Ne3 13.Nc5 bc5 14.Rb1 Bd5 15.Bc7+=) 12...Kd8–/+ 13.Ne5 Ke7 14.Nb5 d6 15.Nd3 Na6 16.Be2 e5 17.Kd2 Bc8 18.Rhf1 Bd7 19.Nc5 Nc5 (19...bc5?! 20.Rf3+=; 19...dc5?! 20.d6 Ke8 21.Kc3=) 20.Nc3 h5 21.Rb1 g6 22.Bd3 h4 23.Bc2 Rac8 24.Nb5 a6 25.Rf7 (25.Nc3!? Rb8 26.Rf2–/+) 25...Kf7–+ 26.Nd6 Kg7 27.Nc8 Rc8 (worse is 27...Bc8 28.h3–/+) 28.Rb6 Rf8 29.Ke3 Rf1 (29...h3 30.gh3 Rh8 31.h4–+) 30.Ke2? (better is 30.Rb1 Rb1 31.Bb1–+) 30...Rg1 31.Kf2 Rc1 32.Rb2 Ba4 33.Ba4 (33.Bb1–+) 33...Nd3 (33...Na4?! 34.Rb7 Kf6 35.Rc7–+) 34.Ke3 Nb2 35.Kd2 Rc4 (35...Na4?! 36.Kc1 Nc5 37.Kd2–+) 36.Bb3 (36.Bc2 Na4–+) 36...Re4 0–1. Palmi,H (2075) – Pap,M (2485), 4th Arber Open, 2015. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7)

6.c4 b6 7.Nc3 Bb7 8.e3 Qc8 9.Bb2 0-0 10.Bd3 Nc6 11.e4 Na5 12.Nd2 d6 13.0-0 Qd7 14.Qf3+=.

6.c4 b6 7.e3 A) 7...Bb7 8.Nc3 (8.Bd3 0-0 9.Nc3 d5 10.cd5 Nd5 11.Nd5 Qd5 12.0-0 Rc8 13.e4 Qd6 14.a4=) 8...Qc8 9.Bd2 Ba6 10.Nb5 0-0 11.Bd3 Rd8 12.Qa4 Qc6 13.0-0 Bb7 14.d5+=; B) 7...0-0 8.Bd3 (8.Nc3 Ba6 9.Bd3 Qc7 10.Ne4 Bc4 11.Qc2 Rc8 12.Nf6 Bf6 13.Bh7 Kh8 14.Bb2+=) 8...Bb7 9.Nc3 d5 10.cd5 Nd5 11.Nd5 Qd5 12.0-0 Rc8 13.e4 Qd6 14.a4=; C) 7...d5 8.cd5 ed5 9.Bb5 Bd7 10.Bd3 Nc6 11.Nc3 0-0 12.0-0 Bg4 13.Ra2 Qd6 14.Rc2=.

6.c4 b6 7.Bg5 0-0 (7...Bb7 8.e3 0-0 9.Bd3 d5 10.cd5 Nd5 11.Be7 Qe7 12.Nbd2 Nd7 13.0-0 Rac8 14.Qa4=; 7...d5 8.cd5 Qd5 9.Nc3 Qa5 10.Bd2 Qf5 11.h3 Nd5 12.Ne5 Nc3 13.Bc3 0-0 14.g4+=; 7...Nc6 8.e3 d5 9.cd5 Qd5 10.Bd3 Bb7 11.0-0 Rc8 12.Nbd2 0-0 13.Qb1 h6 14.Bf6=) 8.Nbd2 (8.e3 d5 9.Bf6 Bf6 10.Bd3 Bb7 11.Qc2 dc4 12.Bh7 Kh8 13.Be4 Be4 14.Qe4=; 8.Nc3 d5 9.Bf6 Bf6 10.cd5 ed5 11.e3 Nc6 12.Bb5 Ne7 13.0-0 Be6 14.Rc1+=) 8...Bb7 9.e3 Ne4 (9...d5 10.Bd3 dc4 11.Nc4 Nbd7 12.0-0 Rc8 13.Bf4 Bd5 14.Nfd2=) 10.Be7 (10.Ne4 Be4 11.Bd3 f5 12.Bf4 Nc6 13.0-0 Rc8 14.c5+=) 10...Qe7 11.Ne4 Be4 12.Bd3 Bd3 (12...f5 13.0-0 (13.Be4 fe4 14.Nd2=) 13...Nc6 14.Be4=) 13.Qd3+= Nc6 14.0-0 Rac8 15.Rac1 (15.Rfe1 d5=) 15...Na5 ½–½. Godes,D (2310) – Bar,R (2410), 16th Maccabia IM, Tel Aviv ISR (4), 2001. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7)

6.c4 Nc6 A) 7.Bg5 A1) 7...e5 8.de5 (8.Ne5 Ne5 9.de5 Qa5 10.Bd2 Qe5 11.Bc3 Qf5 12.Qd3 Qd3 13.ed3 b6 14.Ra2=) 8...Ne5 9.Ne5 Qa5 10.Bd2 Qe5 11.Bc3 Qf5 12.Qd3 Qe6 13.Nd2 0-0 14.e4=; A2) 7...0-0 8.Qc2 (8.Ra2 h6 9.Bf6 Bf6 10.e4 d5 11.e5 Be7 12.Rc2 f6 13.Be2 dc4 14.Rc4+=; 8.e3 Qa5 9.Nbd2 e5 10.de5 Ne5 11.Ne5 Qe5 12.Bf4 Qc3 13.Bg5 Rd8 14.Qc1+=; 8.Nbd2 Qa5 9.e3 e5 10.de5 Ne5 11.Ne5 Qe5 12.Bf4 Qc3 13.Bg5 Rd8 14.Qc1+=; 8.Nc3 d5 9.Bf6 Bf6 10.e3 Qa5 11.Qd2 Be7 12.c5 b6 13.Bb5 Bd7 14.0-0=) 8...h6 9.Bf4 d5 10.e3 Bd7 11.Qb2 Nh5 12.Be5 dc4 13.Bc4 b5 14.Bd3=; B) 7.e3 B1) 7...d5 8.Be2 (8.Nbd2 0-0 9.Rb1 dc4 10.Nc4 b6 11.Bd3 Bb7 12.0-0 Rc8 13.Qe2 Qd7 14.Rd1=; 8.Bd3 dc4 9.Bc4 0-0 10.0-0 a6 11.Bd3 b5 12.Qe2 Bb7 13.Nbd2 Qd7 14.Bb2=; 8.cd5 ed5 9.Bd3 0-0 10.0-0 Re8 11.Nbd2 Bd6 12.Qb3 Qe7 13.Rb1 Rb8 14.Bb2=) 8...dc4 9.Bc4 0-0 10.0-0 Bd6 11.Nbd2 Qc7 12.Bb2 Rd8 13.Rc1 Qe7 14.Bb5=; B2) 7...0-0 8.Be2 (8.Nbd2 d5 9.cd5 ed5 10.Bd3 Re8 11.0-0 Bd6 12.Qb3 Qe7 13.Re1 Bg4 14.h3=; 8.Bd3 d5 9.cd5 ed5 10.0-0 Re8 11.Nbd2 Bd6 12.Qb3 Qe7 13.Rb1 Rb8 14.Bb2=) 8...d5 9.0-0 dc4 10.Bc4 Bd7 11.Nbd2 Rc8 12.Rb1 Qc7 13.Bd3 Rfd8 14.Ne4=.

6.c4 d5 7.cd5 ed5 8.e3 0-0 9.Bd3 Nc6 10.0-0 Re8 11.Qb3 Rb8 12.Nbd2 Bd6 13.Bb2 Ne4 14.Rfc1=.

6.c4 d5 7.e3= 0-0 8.Nbd2 (8.cd5 ed5 9.Bd3 Nc6 10.0-0 Re8 11.Qb3 Rb8 12.Nbd2 Bg4 13.Ne5 Be6 14.Ndf3=; 8.Qb3 Nc6 9.cd5 ed5 10.Bd3 Na5 11.Qc2 Bd7 12.Nc3 Rc8 13.0-0 Nc4 14.Bb2=) 8...Nc6 9.Rb1 dc4 10.Nc4 b6 11.Bd3 Bb7 12.0-0 Rc8 13.Bd2 Qc7 14.Qe2=.

6.c4 d5 7.e3= Nc6 8.Nbd2 (8.Bd3 dc4 9.Bc4 0-0 10.0-0 Bd6 11.Bb2 a6 12.Qc2 Bd7 13.Nc3 b5 14.Bd3=; 8.Be2 dc4 9.Bc4 0-0 10.0-0 a6 11.a4 b6 12.Ba3 Bb7 13.Be7 Qe7 14.Nbd2=; 8.cd5 ed5 9.Bd3 0-0 10.0-0 Re8 11.Qb3 Rb8 12.Nbd2 b5 13.Ne5 Ne5 14.de5=) 8...0-0 9.Rb1 a6 10.Qc2 Qc7 11.cd5 ed5 12.Bd3 b5 13.0-0 Be6 14.a4=.

6.c4 d5 7.e3 Bd7 8.Bd3 dc4 9.Bc4 0-0 10.0-0 Bc6 11.Ne5 Bd5 12.Qb3 Qc7 13.Nd2 Nc6 14.Nc6 Bc6 15.f4 b5 16.Be2 (16.Bb5? Rab8 17.a4 a6–+) 16...Rab8 17.Bf3 Rfc8 18.Bb2 Bf3 19.Nf3 Qc2 20.Qc2 Rc2 21.Rf2 Rbc8 22.Ne1 Rf2 23.Kf2 Ng4 24.Kf3 Nh2 25.Ke2 Bh4 26.Kd3 Ng4 27.Nf3 Nf2 28.Kd2 Ne4 (better is 28...Bg3–/+) 29.Kd3= Nf2 30.Kd2 Be7 31.Rc1 Rc1 32.Bc1 Ne4 33.Kd3 Nd6 (33...f5!?–/+) 34.Ne5+= Nc8 35.Nc6 Bd6 36.e4 Kf8 37.e5 Bc7 38.Ke4 Ke8 39.d5 Kd7 40.de6 fe6 41.Nd4 White prepares f5 41...a6 42.g4 White plans f5 42...g6 43.f5 gf5 44.gf5 ef5 45.Kf5 Ne7 46.Kf6 Nd5 47.Kf5 Ne7 48.Kf6 Nd5 ½–½. Stanciu,Adrian_Eugen (2000) – Rosca,Constantin, 1st Gaudeamus Cup, 2011. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7)

6.e3 0-0 7.Bd3 d5 8.0-0 b6 9.c4 Ba6 10.Nbd2 (10.cd5 A) 10...ed5 11.Ra2 (11.Bb2 Re8 12.Nc3 Bd3 13.Qd3 Nc6 14.Ne5=; 11.Nc3 Bd3 12.Qd3 Nc6 13.Re1 Rc8 14.e4=) 11...Re8 12.Rc2 Bd3 13.Qd3 Qd6 14.Bb2+=; B) 10...Qd5 11.Nc3 (11.Bb2 Rc8 12.Nc3 Qa5 13.Qe2 Bd3 14.Qd3=; 11.Ba6 Na6 12.Qe2 Nb8 13.Nc3 Qh5 14.Rb1=) 11...Qh5 12.Ne5 Bd3 13.Qh5 Nh5 14.Nd3=; C) 10...Bd3 11.Qd3 Qd5 12.Nc3 Qh5 13.Rb1 Rc8 14.e4=; 10.Ne5 A) 10...Bd6 11.Nd2 (11.f4 Ne4 12.Be4 de4 13.Qc2 Qc7 14.Qe4=; 11.cd5 Be5 12.de5 Qd5 13.ef6 Bd3 14.Qg4=) 11...Be5 12.de5 Nfd7 13.Bb2 Nc6 14.cd5=; B) 10...Bb7 11.Qf3 (11.Nd2 Nbd7 12.Bb2 Rc8 13.Qf3 Ne5 14.de5=; 11.Nc3 Nbd7 12.Bb2 dc4 13.Nc4 a6 14.Ne5=) 11...Nc6 12.cd5 Ne5 13.de5 Qd5 14.Qd5=; C) 10...Bc4 11.Nc4 dc4 12.Bc4 Bd6 13.Nd2 Nc6 14.Bb2=; D) 10...dc4 11.Nc4 Qd5 12.Nbd2 Rc8 13.Qe2 Bb7 14.Nf3=) 10...Qc8 (10...Qc7 11.Qb3 (11.Qe2 Rc8 12.cd5 Bd3 13.Qd3 Nd5 14.e4=; 11.Ne5= Nc6 12.Bb2 Ne5 13.de5 Nd7 14.Qc2=) 11...Rc8 12.cd5 Nd5 13.Ba6 Na6 14.Bb2=; 10...Nc6 11.Bb2 (11.Ra2 Rc8 12.Rc2 Bd6 13.Bb2 Qe7 14.Qa1=; 11.Qa4 Na5 12.Ne5 Bd6 13.c5 Bd3 14.Nd3=) 11...Na5 12.Ne5 dc4 13.Ndc4 Nc4 14.Nc4=; 10...dc4 11.Nc4 Bb7 12.Bb2 Nbd7 13.Rc1 Rc8 14.Qe2=; 10...Bb7 11.cd5 (11.Bb2 dc4 12.Nc4 Nbd7 13.Rc1 Rc8 14.Qe2=; 11.Rb1 dc4 12.Nc4 Nbd7 13.Qe2 Be4 14.Bd2=) 11...Qd5 12.e4 Qd7 13.Bb2 Nc6 14.Qb1=) 11.Qe2 (11.Qc2 dc4 12.Nc4 b5 13.Nce5 Qc2 14.Bc2=; 11.Ne5 Nfd7 12.Qh5 f5 13.Nd7 Nd7 14.Qe2=) 11...Nc6 12.Bb2 (12.e4 dc4 13.Nc4 Rd8 14.Bb2=) 12...Na5 (12...Qc7 13.Rac1 Rac8 14.Ne5+=; 12...Rd8 13.Rac1 Qd7 14.Rfd1+=) 13.Ne5 (13.cd5 Bd3 14.Qd3=) 13...Qb7 (13...dc4 14.Ndc4=) 14.Rac1 Rac8 15.Rc2 (15.cd5 Bd3 16.Qd3 Qd5=) 15...Rc7 16.Rfc1 Rfc8 17.h3 Bf8 18.Kh1 ½–½. Garcia – Anelli, Buenos Aires, 1978. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7)

6.e3 0-0 7.Bd3 d5 8.0-0 b6 9.c4 Bb7 A) 10.Nbd2 A1) 10...Nc6 11.Qe2 (11.cd5 Nd5 12.Nb3 f5 13.Qe1 Qd6 14.e4=; 11.Rb1 Qd7 12.Qc2 Rac8 13.Rd1 Na5 14.Ne5=) 11...Rc8 12.Rb1 Na5 13.cd5 Nd5 14.Bb2=; A2) 10...Nbd7 11.cd5 (11.Bb2 dc4 12.Nc4 Rc8 13.Qe2 Be4 14.Be4=; 11.Qe2 dc4 12.Nc4 Be4 13.Be4 Ne4 14.Bd2=) 11...Nd5 12.Bb2 f5 13.Qa4 a6 14.Rfc1=; A3) 10...Na6 11.cd5 (11.Qe2 Nc7 12.Bb2 dc4 13.Nc4 Be4 14.Rfc1=; 11.Rb1 dc4 12.Nc4 Rc8 13.Qe2 Bf3 14.Qf3=) 11...Nd5 12.Bb2 Nac7 13.Rc1 Rc8 14.Ne5+=; A4) 10...dc4 11.Nc4 (11.Bc4 Nc6 12.Bb2 Rc8 13.Rc1 a6 14.Bd3=) 11...Nc6 12.Qe2 a6 13.Rd1 b5 14.Nce5=; B) 10.Qe2 B1) 10...Nc6 11.Nbd2 (11.cd5 Qd5 12.Bb2 Rac8 13.Nc3 Qh5 14.Rac1=; 11.Bb2 dc4 12.Bc4 Na5 13.Bd3 Nb3 14.Ra2=) 11...Rc8 12.Bb2 dc4 13.Nc4 a6 14.Nce5=; B2) 10...a6 11.Nbd2 (11.cd5 Qd5 12.Nc3 Qh5 13.e4 Rc8 14.Bd2=; 11.Nc3 dc4 12.Bc4 Nbd7 13.Bd3 b5 14.Bb2=) 11...dc4 12.Nc4 Nc6 13.Bb2 b5 14.Nce5=; B3) 10...dc4 11.Bc4 Nc6 12.Bd3 Rc8 13.Bb2 Qd7 14.Nc3=; C) 10.Bd2 C1) 10...Ba6 11.Qb3 (11.Ne5 Nfd7 12.Qh5 g6 13.Qe2 Ne5 14.de5–/+; 11.Qc2 dc4 12.Bc4 Qc7 13.Rc1 Rc8 14.Bd3=) 11...dc4 12.Bc4 Bb7 13.Rc1 Bd6 14.Ra2=; C2) 10...Nc6 11.cd5 (11.Qe2 dc4 12.Bc4 Qd6 13.Rc1 a6 14.Bd3=; 11.Nc3 dc4 12.Bc4 Rc8 13.Bd3 a6 14.Qe2=) 11...Qd5 12.Nc3 Qd7 13.Qb1 Rfd8 14.Rc1=; C3) 10...dc4 11.Bc4 Nc6 12.Qe2 Qd6 13.Nc3 a6 14.Bd3=; D) 10.Bb2 D1) 10...Nc6 11.cd5 (11.Nc3 dc4 12.Bc4 Rc8 13.Qe2 Na5 14.Bd3=; 11.Nbd2 dc4 12.Nc4 a6 13.Qb1 b5 14.Nce5=) 11...Nd5 12.Nc3 Rc8 13.Rc1 Na5 14.Qe2=; D2) 10...dc4 11.Bc4 Nc6 12.Nc3 Rc8 13.Qe2 Na5 14.Bd3=; E) 10.cd5 E1) 10...Bd5 11.Bb2 (11.Nc3 Bb7 12.Bb2 Nbd7 13.Rc1 a6 14.a4=; 11.Nbd2 Nbd7 12.e4 Bb7 13.Qc2 Rc8 14.Qb1=) 11...Be4 12.Nc3 Bd3 13.Qd3 Nc6 14.e4+=; E2) 10...Nd5 11.Qc2 (11.e4 Nf6 12.e5 Nd5 13.Qe2 Qd7 14.Rd1=; 11.Qe2 Nc6 12.e4 Nf6 13.e5 Nd5 14.Qe4=) 11...Nf6 12.e4 Qd7 13.Rd1 Rc8 14.Nc3=; E3) 10...Qd5 11.Nbd2 (11.Bd2 Nc6 12.Nc3 Qd7 13.Qb1 Rfd8 14.Rc1=; 11.Nc3 Qh5 12.e4 Rc8 13.Bd2 Nc6 14.Be2=) 11...Nc6 12.e4 Qd7 13.Bb2 Rfd8 14.Qb1=.

6.e3 0-0 7.Bd3 d5 8.0-0 b6 9.c4 dc4 10.Bc4 A) 10...Ba6 11.Ba6 (11.Bd3 Bd3 12.Qd3 Nbd7 13.Rd1 Rc8 14.e4=; 11.Nbd2 Bc4 12.Nc4 Nc6 13.Nfe5 Rc8 14.Nc6=) 11...Na6 12.e4 Rc8 13.Qe2 Nb8 14.Bf4=; B) 10...Bb7 11.Qe2 (11.Nbd2 Nc6 12.Bb2 Rc8 13.Rc1 a6 14.Bd3=; 11.Bb2= Nc6 12.Nc3 Rc8 13.Qe2 Na5 14.Bd3=) 11...Nbd7 12.Nbd2 a6 13.a4 Ne8 14.e4+=; C) 10...a6 11.Bd3 (11.Qe2 Bb7 12.Bb2 Qd6 13.a4 Rc8 14.Ba3=; 11.Bb2 Bb7 12.Bd3 b5 13.Qe2 Be4 14.Rc1=) 11...Bb7 12.Nbd2 Nc6 13.Bb2 b5 14.Qe2=; D) 10...Nbd7 11.Bb2 (11.Nbd2 Bb7 12.Bb2 a6 13.Bd3 b5 14.Rc1=; 11.Qe2 Bb7 12.Nbd2 Rc8 13.Rb1 Ne4 14.Bb2=) 11...Bb7 12.Nbd2 Rc8 13.Qe2 Ne4 14.Ne4=.

6.e3 0-0 7.Bd3 d5 8.Nbd2 Bd7 9.0-0 Ba4 10.Qe2 Nc6 11.c4 Rc8 12.Bb2 Na5 13.cd5 Nd5 14.Ne5 Nc6 15.Ndc4 f6 16.Qh5 f5 (16...fe5?? 17.Bh7 Kh8 18.Bg6 Kg8 19.Qh7) 17.Rac1 (17.Rfc1 Bb5=) 17...Bb5 18.Qe2 Ne5 19.Ne5 Bd3 20.Nd3 Bd6 21.Rc8 Qc8 22.g3 Re8 23.Rc1 Qd7 24.Nc5 Qe7 25.a4 b6 26.Nd3 Qd7 27.Qc2 Rb8 28.Qb3 b5 29.Nc5 Qe8 30.a5 Rc8 31.Kg2 (31.f3 Bc5 32.dc5 Qc6=) 31...Bc5 32.dc5 Qc6 33.f3 Rd8 34.h3 a6 35.Be5 Ne7 36.Bd6 Qd5 37.Qc2 Nc6 38.Rd1 Nb4 39.Qe2 (39.Rd5? Nc2 40.Rd2 Ne3 41.Kf2 Nc4–+) 39...Qb3 40.e4 Nc6 41.Rd2 h6 (worse is 41...Na5 42.Rb2 Qc3 43.ef5+=) 42.h4 Kh7 (worse is 42...Na5 43.Rb2 Qc3 44.ef5+=) 43.Rb2 Qc3 44.Rc2 Qf6 (44...Qa5 45.ef5 ef5 46.Qd3=) 45.Rd2 Kg8 46.Rd3 Qg6 (worse is 46...Na5 47.Be5 Qe7 48.Rd8 Qd8 49.ef5+/–) 47.ef5 ef5 48.Bf4 Rd3 49.Qd3 Qe6 50.h5 Kf7 51.Qd2 b4 52.Kf2 b3 53.Qc3 Qd5 54.Bc1 Qd4 55.Qd4 Nd4 56.Bb2 (56.Ke3 Ne6 57.c6 Ke7=) 56...Nc6 57.Ke3 f4 58.Kf4 Na5 59.g4 Nb7 60.c6 Nd8 61.Ke5 Nc6 62.Kd5 Nb4 63.Kd4 Nc2 64.Kc4 (64.Kc3 Ne1 65.f4 a5 66.Kb3 Nd3=) 64...Ne1+= 65.f4 a5 66.Kb3 Nd3 67.Bg7 (better is 67.Bc3!?=) 67...Kg7–/+ 68.g5 Nc5 (worse is 68...Nf4 69.gh6 Kh6 70.Ka4=) 69.Kc4 ½–½. uberlebende (2115) – glovio (2260), gameknot.com, 2014.

6.e3 b6 7.Bd3 Bb7 8.Nbd2 Qc7 9.Bb2 d5 10.c4 Nbd7 11.Rc1 Qd6 12.Qb3 0-0 13.0-0 Rfb8 14.Ne5 Ne4 15.Ne4 (15.Rfd1 f6 16.Nd7 Qd7+=) 15...de4= 16.Nd7 ed3?? (better is 16...Qd7 17.Be2 Qc7=) 17.Nb8+– Rb8 18.Qd3 e5 19.d5 Ba6 20.f4 f6 21.fe5 fe5 22.Rf5 Bf6 23.Qb3 Bc8 24.Rff1 Bd7 25.a4 Qc5 26.Kh1 Qa5 (26...Be8 27.e4+–) 27.Ra1 (27.e4 Re8+–) 27...Qd2 (27...Rc8 28.e4 Qc5 29.Qg3+–) 28.e4 (28.c5 Bg4+–) 28...Qg5 (28...Rc8 29.Be5! Be5 30.Qf3+–) 29.a5 (29.c5 Bg4+–) 29...Be7 (29...Qg6 30.c5! Qe4 31.ab6 ab6 32.c6+–) 30.Ba3 (30.c5!? Bc5 31.d6 Kh8+–) 30...Bd8 (30...Ba3 31.Ra3 Qd8+–) 31.Rf8 1–0. Guillen Domenech (1845) – Garcia Sanchez, Valencia–chB, 2003. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7)

6.g3 b6 7.Bg2 Bb7 8.0-0 0-0 9.Nbd2 Qc7 10.Bb2 b5 11.Rc1 d5 12.Ne5 Nbd7 13.f4 Ne5 14.fe5 Ng4 15.Rf3 Bg5 16.Bf1 Qb6 17.Nb3 (better is 17.Qe1 Ne5 18.Rb3–+) 17...Ne5 18.e3 Nf3 19.Qf3 e5! 20.Re1 (20.de5 Be3 Double attack (20...Qe3 Pinning; 20...Qe3 Deflection)) 20...e4 21.Qf5 Be7 22.Ra1 (22.Qd7 Bd6 23.Qb5–+) 22...Rac8 23.Nc5 Rc5 24.dc5 Bc5 (24...Qc5?! 25.Bd4 Qc6 26.Ba7–+) 25.Qg4 Be3 26.Kh1 d4 27.Bg2 f5 28.Qe2 f4 29.gf4 Rf4 30.Rd1 Rh4 31.h3 (31.Qf1 Bc8 32.Bd4 Bd4–+) 31...Qh6 32.Qf1 Bc8 33.Kh2 (33.Rd4 Bd4 34.Bd4 Bh3 35.Be5 Bg2 36.Kg2 Qd2 37.Qf2–+) 33...Qd6 34.Kh1 Qg3 (34...Qg3 35.Rd4 Bd4 36.Bd4 Bh3 37.Bh3 e3–+) 0–1. Rodriguez Antuna,Ruben – Aguera Naredo,Javier (2275), Asturias–ch Preferente, 1993. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7)

7.e3 b6 8.Bb5 Bd7 9.a4 Bb5 10.ab5 a5 11.Ne5 Nfd7 12.Ndf3 0-0 13.0-0 Ne5 14.de5 (14.Ne5 Qc7=) 14...Nd7 15.Bb2 Qc7 16.Ra4 Rfc8 17.Qa1 Qc2 18.Nd4 Qc7 19.Nc6 Nb8 20.Ne7 Qe7 21.Ba3 Qe8 22.Rc1 (22.Rb1 Nd7–+) 22...Nd7 (22...Rc1 23.Qc1 Na6 24.Rg4–+) 23.Rc6 (23.Rc8 Rc8 24.Qb2 Nc5–+) 23...Rc6–+ 24.bc6 Nf8 25.Qc3 (25.Bf8 Kf8 26.Rh4 Qc6 27.Rh7 Kg8–+) 25...Rc8 26.Rg4 (26.Bf8 Kf8 (26...Qf8?! 27.Ra1–/+) 27.Qd4 Qc6–+) 26...Rc6 27.Qd3 (27.Qa1 b5–+) 27...Ng6 28.f4 Rc4 29.Bd6 (29.Rg3 b5–+) 29...Qa4 (better is 29...Qb5 30.Qf1 Qb2 31.f5 Rg4 32.fg6 Rg6 33.Kh1–+) 30.h4 Qc2 31.Qc2 Rc2 32.h5 Nf8 33.Be7 Nd7 34.Bf6 Nf6 35.ef6 g6 36.f5 Rc4 (36...Rc4 37.Rg3 ef5–+) 0–1. Carbonell Bofill (2240) – Tormos Beltran, Burjasot Absoluto op, 1997. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7 6.Nbd2 d5)

8.Bd3 b6 9.0-0 Ba6 10.c4 Qc7 11.Qe2 Rc8 12.cd5 Bd3 13.Qd3 ed5 14.Ne5 Nc6 15.Bb2 Na5 16.Rac1 Qd8 17.Qf5 b5 18.g4 Qe8 19.g5 Nh5 20.Qg4 g6 21.f4 Rc1 22.Rc1 ½–½. Hoehnemann De Beau,Hans Juergen – Gerwinat,Dirk, Marianske Lazne op, 2006. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7 6.Nbd2 d5 7.e3 0-0)

10.cd5 ed5 11.Qb3 A) 11...Re8 12.Bb5 (12.Rc1 Ba6 13.Ba6 Na6 14.0-0 Bd6 15.Qd3= ; 12.Bd3 Ba6 13.Rc1 Bd3 14.Qd3 a6 15.0-0=) 12...Bc6 13.Bd3 Bd7 14.Ne5 Nc6 15.0-0=; B) 11...Qd6 12.Bb5 (12.Bc3 Nc6 13.Bd3 Rfc8 14.0-0 Rc7 15.Rfc1= ; 12.Rc1 Rc8 13.Rc8 Bc8 14.Bd3 Ba6 15.0-0=) 12...Ba6 13.a4 Qe6 14.0-0 Rc8 15.Ba3+=; C) 11...a6 12.Be2 (12.Rc1 Nc6 13.Bd3 b5 14.Qc3 Rc8 15.Bf5= ; 12.Bd3 Nc6 13.Bc3 b5 14.0-0 Rc8 15.Rfc1=) 12...Nc6 13.0-0 Rc8 14.Rfc1 Re8 15.Bd3=; D) 11...Bd6 12.Rc1 (12.Bd3 Ba6 13.Ba6 Na6 14.0-0 Qe7 15.Rfc1= ; 12.Bb5 Ba6 13.0-0 Bb5 14.Qb5 Re8 15.Rfc1=) 12...Nc6 13.Bd3 Rc8 14.0-0 Qe7 15.Rfd1=.

10.cd5 ed5 11.Rc1 A) 11...Nc6 12.Bd3 (12.Ne5 Ne5 13.de5 Nd7 14.Bd3 Nc5 15.Be2= ; 12.Bb5 Rc8 13.0-0 a6 14.Bd3 Re8 15.Qe2=) 12...Rc8 13.0-0 Bd6 14.Ne5 Qe8 15.Ng4+=; B) 11...Qd6 12.Bd3 (12.Nh4 Qe6 13.Bd3 Ne4 14.Nhf3 Nc6 15.0-0= ; 12.Be2 Rc8 13.Rc8 Bc8 14.0-0 Ba6 15.Ba6=) 12...Rc8 13.Rc8 Bc8 14.e4 Qf4 15.Qe2=; C) 11...Ba6 12.Ba6 (12.Be2 Bd6 13.Ne5 Qe7 14.Ba6 Na6 15.0-0= ) 12...Na6 13.0-0 Re8 14.Ne5 Bd6 15.Qe2=; D) 11...Bd6 12.Qb3 (12.Qa4 a6 13.Bd3 b5 14.Qd1 Qe7 15.a4=; 12.Bd3 Ba6 13.Qe2 Bd3 14.Qd3 Nbd7 15.0-0=) 12...Ba6 13.Ba6 Na6 14.0-0 Qe7 15.Qd3=.

10.cd5 ed5 11.Bd3 Bd6 (11...Ba6 12.Bf5 (12.Ba6 Na6 13.0-0 Re8 14.Ne5 Bd6 15.Qf3=; 12.Qc2 Bd3 13.Qd3 Qd6 14.Rc1 Re8 15.0-0=) 12...Re8 13.Rc1 Bd6 14.Ne5 g6 15.Bh3=; 11...Re8 12.Rc1 (12.Qa4 a6 13.0-0 Nc6 14.Rfc1 b5 15.Qd1=; 12.Qe2 Nc6 13.0-0 Rc8 14.Rfc1 Bd6 15.Bf5=) 12...Ba6 13.Bf5 Bd6 14.Ne5 g6 15.Bh3=; 11...Qd6 12.Rc1 (12.Ne5 Ba6 13.Bf5 Bc8 14.Bc2 Be6 15.Rc1=; 12.Nh4 g6 13.Nhf3 Ba6 14.Ba6 Na6 15.0-0=) 12...Ba6 13.Ba6 Na6 14.Qe2 Nb8 15.e4+=) 12.0-0 (12.Rc1 Ba6 13.Bf5 Qe7= 14.Qb3 Nbd7 15.Qa4=; 12.Ne5 Qe7 13.Qf3 Ba6 14.Bf5 Re8 15.Ra2=; 12.Qb3 Ba6 13.Rc1 Bd3 14.Qd3 Qe7 15.0-0=) 12...Re8 (12...Ba6 13.Qe2 (13.Qc2 Bd3 14.Qd3 Nbd7 15.a4=) 13...Bd3 14.Qd3= Nc6 15.Rac1=) 13.Ne5 (13.Qa4 Qd7 14.Qd7 Nbd7= 15.Nh4=) 13...Nbd7 (13...Ba6 14.Ndf3 Ne4 15.Ba6=) 14.Ndf3 Rc8 15.Qa4 (15.Qb1 Ne4=; 15.Qb3=) 15...a6 16.Rfc1 (16.Ba6 Ra8 17.Qd7 Nd7 18.Bb7 Be5 19.de5 Ra7+=) 16...b5 17.Rc8 Qc8 (17...Bc8 18.Qc2=) 18.Qa5 Bc7 19.Qb4 Ne4 20.Rc1 Nb6 21.Qb3 Nc4 22.a4 (22.Be4 de4 23.Nc4 A) worse is 23...ef3 24.Nd6 Qd7 25.Rc7 (25.Nb7 Qg4 26.Kf1 Qg2 27.Ke1 Qg1 28.Kd2 Qf2 29.Kc3 Re3 30.Kb4 Qd2 31.Kc5 Rb3–+; 25.Ne8 Qg4 26.Qf7 Kf7 27.Rc7 Ke8 28.g3 Qh3 29.Rc8 Bc8 30.e4 Qg2) 25...Qc7 26.Ne8=; B) 23...Bd5=) 22...Ned6 (22...ba4 23.Qa2 Nb2 24.Be4+=) 23.ab5 (worse is 23.Bc4 A) worse is 23...Nc4 A1) worse is 24.Nc4 dc4 (24...bc4?! 25.Qc2+=) 25.Qd1 b4–/+; A2) 24.ab5 Bd6 25.Nc4 dc4 26.Rc4+=; B) 23...dc4 24.Qa2 f6–/+; 23.Nc4? dc4 (23...bc4?! 24.Qc2+=) 24.Qc3 Bf3 (24...cd3?! 25.d5 Qg4 26.h3–/+) 25.gf3 cd3–+) 23...ab5 24.Qc2 (24.Ng5 h6 25.Ngf3 Qe6=) 24...g6 (24...Ne4 25.Ba1= (worse is 25.Bc4 dc4 26.Ne1 Nd6–/+)) 25.Bc3 (25.Be2 Qf5+=) 25...Kg7 (25...Qe6 26.Be2=) 26.Bb4+= Ne4 27.Be2 (worse is 27.Bc4 dc4 28.Ba3 f6+=) 27...Qe6 28.Nd3 (worse is 28.Bc4 dc4 29.Ra1 Rc8+=) 28...Ra8 29.Qb1 Qa6 30.Nc5 Nc5 (30...Qa2 31.Qd3 (31.Nb7?! Qe2 32.Rc2 Ra1 33.Qa1 Qc2+=) 31...Qb2 32.Rb1=) 31.dc5+= Bc6 32.Nd4 Be5 33.Bf3 (33.Bc3 Bf6+=) 33...Qb7 (33...Bd4 34.ed4 Qa2 35.Qd3=) 34.Bc3 Kg8 35.Qd3 Ra3 36.Nc6 (36.Qd1!?+=) 36...Qc6= 37.Bd5 Qc5 38.Bc4 bc4 39.Qd8 Kg7 40.Be5 Qe5 41.Qd1 c3 42.g3 Qe4 43.Qd6 Ra4 44.Qf4 (44.Qc5 Rc4 45.Qa3 c2+=) 44...Qf4 ½–½. Rosner,Dirk (2180) – Hnatovsky,Nicholas (2150), IECG, 2000.

10.cd5 ed5 11.Be2 A) 11...Ba6 12.0-0 (12.Ne5 Re8 13.Ba6 Na6 14.0-0 Bd6 15.Rc1= ; 12.Ba6 Na6 13.Rc1 Bd6 14.0-0 Qe7 15.Qe2=) 12...Qd6 13.Rc1 Be2 14.Qe2 Nbd7 15.Ne5+=; B) 11...Bd6 12.Rc1 (12.0-0 Nc6 13.Rc1 Rc8 14.Ne5 Qe8 15.Bb5= ; 12.Ne5 Qe7 13.0-0 Rc8 14.Qb1 Ne4 15.Rd1=) 12...Ba6 13.0-0 Qe7 14.Ba6 Na6 15.Qe2=; C) 11...Qd6 12.Rc1 (12.0-0 Rc8 13.Qa4 Nc6 14.Bd3 a6 15.Rfc1= ; 12.Ne5 Nc6 13.Rc1 Rfc8 14.0-0 Qe6 15.Nc6=) 12...Nc6 13.0-0 Rac8 14.Ne5 Ne4 15.Ne4=; D) 11...Re8 12.Rc1 (12.0-0 Ba6 13.Ba6 Na6 14.Ne5 Bd6 15.Rc1= ; 12.Ne5 Bd6 13.Rc1 Nbd7 14.Nc6 Bc6 15.Rc6=) 12...Bd6 13.0-0 Ba6 14.Ba6 Na6 15.Qe2=.

10.cd5 ed5 11.Ne5 A) 11...Nc6 12.Rc1 (12.Bd3 Ne5 13.de5 Ne4 14.Qh5 f5 15.ef6= ; 12.Nc6 Bc6 13.Rc1 Rc8 14.Ba6 Rc7 15.0-0=) 12...Ne5 13.de5 Nd7 14.Nf3 Rc8 15.Be2=; B) 11...Nbd7 12.Rc1 (12.Bb5 Ne5 13.de5 Ne4 14.0-0 Rc8 15.Bd3= ; 12.Bd3 Ne4 13.0-0 Rc8 14.Ndf3 Ne5 15.Ne5=) 12...Ne5 13.de5 Nd7 14.Be2 Re8 15.0-0=; C) 11...Ne4 12.Rc1 (12.Bd3 Nd7 13.0-0 Rc8 14.Ndf3 Ne5 15.Ne5= ; 12.Be2 Nd7 13.0-0 Rc8 14.Bd3 Ne5 15.de5=) 12...Bd6 13.Bd3 Qe7 14.0-0 a6 15.Qc2=; D) 11...Bd6 12.Bd3 (12.Bb5 a6 13.Bd3 Nbd7 14.0-0 Re8 15.Ndf3= ; 12.Be2 Qe7 13.0-0 Nc6 14.Ndf3 Rfc8 15.Qd3= ) 12...Ba6 13.Bf5 Bc8 14.Qc2 Bf5 15.Qf5=.

10.cd5 Qd5 A) 11.Bc4 A1) 11...Qh5 12.Rc1 (12.0-0 Nc6 13.Ne5 Qh6 14.Ng4 Ng4 15.Qg4=; 12.Bd3 Rc8 13.0-0 Nbd7 14.Rb1 Nd5 15.Qb3=) 12...Rc8 13.0-0 Nbd7 14.Qe2 a6 15.Bd3=; A2) 11...Qf5 12.Qb3 (12.Qe2 Rc8 13.0-0 Nbd7 14.Bd3 Qh5 15.e4=; 12.Qb1 Qg4 13.0-0 Nbd7 14.Bd3 Rac8 15.e4=) 12...Rc8 13.0-0 Bd5 14.Bd5 ed5 15.Rac1=; A3) 11...Qa5 12.Qb3 (12.Qe2 Rc8 13.0-0 a6 14.Bd3 Nbd7 15.e4=; 12.0-0 Rc8 13.Qb3 Qh5 14.Rac1 Nc6 15.Be2=) 12...Ne4 13.0-0 Nd2 14.Nd2 Qg5 15.f3=; A4) 11...Qd6 12.Rc1 (12.Qe2 Nbd7 13.Rc1 Rfc8 14.e4 Qf4 15.Bd3=; 12.Bd3 Nbd7 13.Qb1 Qd5 14.e4 Qh5 15.Bc3=) 12...Rc8 13.Qe2 Nbd7 14.e4 Qf4 15.Bd3=; B) 11.Rc1 B1) 11...Nc6 12.Bd3 (12.Bc4 Qh5 13.Qe2 Rfc8 14.e4 Rc7 15.Ne5=; 12.Qb3 Qb3 13.Nb3 Rac8 14.Bd3 Rfd8 15.0-0=) 12...Rac8 13.e4 Qa5 14.0-0 Qh5 15.Rc2=; B2) 11...Rd8 12.Bd3 (12.Bc4 Qa5 13.Qb3 Bf3 14.gf3 a6 15.Bd3=; 12.Qb3 Qb3 13.Nb3 Nbd7 14.Bd3 a6 15.Nbd2=) 12...Ba6 13.Ba6 Na6 14.Qe2 Qa2 15.Nb1=; B3) 11...Re8 12.Bd3 (12.Bc4 Qa5 13.Qb3 a6 14.0-0 b5 15.Bd3=; 12.Qb3 Qb3 13.Nb3 Nbd7 14.Bd3 Rac8 15.Ke2=) 12...Nc6 13.e4 Qa5 14.Qb3 Rac8 15.0-0=; B4) 11...Nbd7 12.Bc4 (12.Qa4 a6 13.Bd3 b5 14.Qb3 Nb6 15.Qd5+=; 12.Rc7 Rfc8 13.Bc4 Qa5 14.Rb7 Rc4 15.d5+=) 12...Qh5 13.0-0 Rfc8 14.Qe2 a6 15.Bd3=; C) 11.Qb1 C1) 11...Qa5 12.Be2 (12.Bd3 Bf3 13.gf3 Nc6 14.Rg1 Rfd8 15.f4+=; 12.Qd3 Rc8 13.Qb5 Qb5 14.Bb5 a6 15.Bd3=) 12...Be4 13.Qc1 Bc6 14.0-0 Rc8 15.Qb1=; C2) 11...Qh5 12.Bd3 (12.e4 Rc8 13.Bd3 Nc6 14.0-0 Rc7 15.Rc1=) 12...Nbd7 13.0-0 Rac8 14.e4 Rfd8 15.Rc1=; C3) 11...Rd8 12.Bd3 (12.Bc4 Qh5 13.0-0 Nbd7 14.Bd3 Rac8 15.e4=; 12.Be2 a6 13.0-0 b5 14.a4 b4 15.Rc1=) 12...Nc6 13.e4 Qh5 14.0-0 Rac8 15.Rc1=; C4) 11...Rc8 12.Bd3 Nc6 13.e4 Qh5 14.0-0 Rc7 15.Qd1=; D) 11.Bd3 D1) 11...Rc8 12.0-0 (12.e4 Qa5 13.0-0 Qh5 14.Ne5 Qh6 15.Qe2=; 12.Qe2 Nc6 13.e4 Qh5 14.Rb1 Rc7 15.Ne5=) 12...Ba6 13.e4 Qh5 14.Ne5 Qd1 15.Rfd1=; D2) 11...Rd8 12.e4 (12.Rc1 Ba6 13.Ba6 Na6 14.Qe2 Nb8 15.Rc2=; 12.Qe2 Nc6 13.e4 Qh5 14.0-0 a6 15.Rfc1=) 12...Qa5 13.0-0 Ba6 14.Ba6 Na6 15.Qb3=; D3) 11...Nbd7 12.0-0 (12.e4 Qh5 13.Ne5 Qg5 14.Nd7 Nd7 15.Qf3=; 12.Qe2 Rfc8 13.0-0 Rc6 14.e4 Qh5 15.Rac1=) 12...Rfc8 13.e4 Qh5 14.Qe2 Rc6 15.Rac1=; D4) 11...Ba6 12.Ba6 (12.e4 Qa5 13.Qb3 Bd3 14.Qd3 Nc6 15.Rb1=; 12.Bc2 Rc8 13.Nb3 Nc6 14.Nbd2 Qa5 15.Rc1+=) 12...Na6 13.Qe2 Qb7 14.Rc1 Rac8 15.0-0=.

10.cd5 Bd5 A) 11.Rc1 A1) 11...Bb7 12.Bd3 (12.Bc4 Nc6 13.0-0 Rc8 14.Qe2 Na5 15.Ba6=; 12.Be2 Nc6 13.e4 a6 14.0-0 Rc8 15.Qb3=) 12...Nc6 13.Qe2 Rc8 14.Rc2 Qd7 15.0-0=; A2) 11...Bd6 12.Bd3 (12.Nc4 Nc6 13.Nd6 Qd6 14.Bd3 Rac8 15.0-0=; 12.Qe2 Qe7 13.Qd3 Qb7 14.Be2 Nbd7 15.0-0=) 12...Qe7 13.Rc3 Nbd7 14.e4 e5 15.0-0+=; A3) 11...b5 12.Bd3 (12.Qc2 b4 13.ab4 Bb4 14.Bc3 Bc3 15.Qc3=) 12...b4 13.ab4 Bb4 14.0-0 a5 15.e4=; B) 11.Bd3 B1) 11...Nbd7 12.Rc1 (12.e4 Bb7 13.Qb3 Nh5 14.0-0 Ndf6 15.Rac1=; 12.Qb1 Bb7 13.0-0 Rc8 14.Rc1 Rc1 15.Bc1=) 12...Rc8 13.Rc8 Qc8 14.e4 Bb7 15.0-0+=; B2) 11...Bc6 12.0-0 (12.Rc1 a6 13.0-0 b5 14.Ne5 Bb7 15.Qc2+=; 12.e4 Nh5 13.Bf1 Nf4 14.Ne5 f6 15.Nc6=) 12...Nbd7 13.Qe2 Rc8 14.e4 Nh5 15.Qe3+=; B3) 11...a6 12.0-0 (12.Rc1 Bb7 13.0-0 b5 14.e4 Nh5 15.Qe1=; 12.e4 Bb7 13.0-0 Nh5 14.Rc1 Nf4 15.Bc2=) 12...Bb7 13.Qe2 Nc6 14.Rfc1 Nd5 15.Rc2+=; B4) 11...Bb7 12.Rc1 (12.0-0 Nc6 13.Qb1 Rc8 14.Rc1 a6 15.Ne5=; 12.e4 Nh5 13.0-0 Nf4 14.Bc4 a6 15.Qb3=) 12...Nc6 13.0-0 Rc8 14.Qe2 Qd5 15.e4=.

10.cd5 Nd5 A) 11.Bc4 A1) 11...a6 12.Rc1 (12.0-0 Nc6 13.Qe2 b5 14.Bd3 Nb6 15.Rfc1=; 12.Bd3 Nc6 13.0-0 Qd7 14.Rc1 Rfc8 15.Qe2=) 12...b5 13.Bd3 Nc6 14.Nb3 Rc8 15.0-0=; A2) 11...Nd7 12.0-0 (12.Rc1 Rc8 13.e4 Nf4 14.0-0 a6 15.a4+=; 12.e4 Nf4 13.g3 Ng6 14.h4 h6 15.h5=) 12...Rc8 13.Qb3 N7f6 14.Rfc1 a6 15.Bd3=; A3) 11...Qd6 12.e4 (12.0-0 Nc6 13.Rc1 Rac8 14.Ne4 Qd8 15.Qe2=; 12.Rc1 Rc8 13.Bd3 Rc1 14.Qc1 Nd7 15.Qb1=) 12...Nf4 13.0-0 a6 14.a4 Nc6 15.Ba3=; A4) 11...Nc6 12.0-0 (12.Rc1 a6 13.e4 Nf4 14.g3 Nh3 15.Bf1=; 12.e4 Nf4 13.g3 Nh3 14.Rc1 Bf6 15.Nb3=) 12...a6 13.Qe2 b5 14.Bd3 Qd7 15.Ne4=; B) 11.Bd3 B1) 11...a6 12.0-0 (12.Qc2 h6 13.0-0 Nc6 14.Rfc1 Rc8 15.Qd1=; 12.Qe2 Nc6 13.0-0 Qd7 14.Rfc1 Rfc8 15.Rc2=) 12...Nc6 13.Qe2 Qd7 14.Rfc1 Rfc8 15.Rc2=; B2) 11...Nc6 12.Rc1 (12.0-0 f5 13.Qe2 Rc8 14.Rac1 Rc7 15.Rc2=; 12.Rb1 Rc8 13.0-0 Qd7 14.Nc4 Rfd8 15.Nfe5=) 12...Rc8 13.0-0 Qd7 14.Bb5 f6 15.Qe2=; B3) 11...f5 12.Qe2 (12.0-0 Nc6 13.Qe2 Rc8 14.Rfc1 Rf7 15.Nc4=; 12.Rc1 a6 13.Ne5 b5 14.0-0 Bd6 15.Qb3=) 12...Nc6 13.0-0 Rc8 14.Rfc1 Rc7 15.Rab1=; B4) 11...Ba6 12.Ba6 (12.Ne5 Bd3 13.Nd3 Nc6 14.Rc1 Rc8 15.0-0=; 12.Qc2 Bd3 13.Qd3 Nc6 14.0-0 Rc8 15.Rfc1=) 12...Na6 13.0-0 Bd6 14.e4 Nf4 15.g3=; C) 11.e4 C1) 11...Nf4 12.Rc1 (12.g3 Nh5 13.Rc1 Nf6 14.Bd3 Nc6 15.Qa4=; 12.Ne5 f6 13.Nd3 Ng6 14.Qb3 Qd7 15.Nb4=) 12...f5 13.ef5 Rf5 14.g3 Nd5 15.Qe2=; C2) 11...Nf6 12.Bd3 (12.Qb1 Nbd7 13.Bb5 a6 14.Bd3 Nh5 15.0-0=) 12...Nh5 13.0-0 Nf4 14.Bc4 a6 15.Qb3=; D) 11.Be2 D1) 11...Nd7 12.0-0 (12.Rc1 N7f6 13.Qb3 a6 14.0-0 b5 15.Bd3=; 12.Qb3 N7f6 13.Rc1 a6 14.0-0 b5 15.Bd3=) 12...Rc8 13.Qb3 Nc7 14.Rfc1 Nf6 15.Ne5=; D2) 11...Nc6 12.0-0 (12.Rc1 Rc8 13.0-0 a6 14.Re1 Qd7 15.e4=; 12.Rb1 Rc8 13.0-0 a6 14.e4 Nf4 15.Re1=) 12...Rc8 13.Rc1 a6 14.Re1 f5 15.Qb3=; D3) 11...Re8 12.Bb5 (12.0-0 Nc6 13.Rc1 Rc8 14.Qb3 a6 15.Nc4=; 12.Rc1 Nd7 13.0-0 a6 14.Qb3 N5f6 15.Qd3=) 12...Bc6 13.Bd3 Bb7 14.Qc2 f5 15.Ne5=; D4) 11...a6 12.0-0 (12.Rc1 Nc6 13.0-0 Rc8 14.Re1 Qd7 15.e4=; 12.Bd3 Nc6 13.0-0 Rc8 14.Qe2 b5 15.Rfc1=) 12...Nd7 13.Rc1 b5 14.Qb3 N5f6 15.Rc2=; E) 11.Rc1 E1) 11...a6 12.Bc4 (12.Bd3 Nc6 13.0-0 f5 14.Qe2 Qd7 15.Nc4=; 12.e4 Nf4 13.Ne5 Nd7 14.Nc6 Bc6 15.Rc6=) 12...b5 13.Bd3 Nc6 14.Nb3 Rc8 15.0-0=; E2) 11...Nd7 12.Bd3 (12.Qb3 N7f6 13.e4 Nf4 14.Qe3 Ng6 15.Ne5=; 12.Bc4 a6 13.Bd3 N7f6 14.0-0 Bd6 15.Qb3=) 12...a6 13.0-0 N7f6 14.Ne5 b5 15.Nb3+=; E3) 11...f5 12.Bd3 (12.Ne5 a6 13.Qb3 Rf6 14.f3 b5 15.e4=; 12.Be2 Nd7 13.0-0 a6 14.Qb3 b5 15.a4=) 12...Nd7 13.0-0 a6 14.Qb3 Rb8 15.Rc2=; E4) 11...Nc6 12.Bd3 (12.Qa4 Rc8 13.Bb5 Na5 14.0-0 a6 15.Bd3=; 12.Bb5 Rc8 13.Qa4 Na5 14.0-0 a6 15.Bd3=) 12...Rc8 13.0-0 Rc7 14.Qa4 Qd7 15.Bb5=.

11.Ra2 A) 11...Qc8 A1) 12.Nd2 Nc6 (12...Qd7 13.Rc2 Nc6 14.Bb2 a6 15.Bd3 Rad8= ; 12...Qc6 13.f3 Nd5 14.Nd5 ed5 15.Bd3 Qh6=) 13.Rc2 Qd7 14.Qe2 a6 15.Bd3 Rfc8=; A2) 12.Qd3 a6 (12...Rd8 13.Rc2 Bf3 14.gf3 Nbd7 15.Qe2 a6= ; 12...Bf3 13.gf3 Rd8 14.Rc2 Nbd7 15.Qe2 a6=) 13.Rc2 Bf3 14.gf3 b5 15.Bb3 Nc6=; A3) 12.Qb3 Bf3 13.gf3 Nc6 14.Bd3 e5 15.d5 Na5+=; A4) 12.Qe2 Bf3 (12...Bd6 13.Rc2 Bf3 14.gf3 a6 15.Bd3 Qd8= ; 12...Nbd7 13.Rc2 Bf3 14.gf3 a6 15.Bd3 Qb7=) 13.gf3 a6 14.Rc2 b5 15.Bd3 Qd8=; B) 11...a6 B1) 12.Bd3 Nbd7 (12...b5 13.e4 Nc6 14.d5 Na5 15.de6 fe6= ; 12...Nc6 13.Rc2 b5 14.Qe2 Rc8 15.Rd1 Qa5=) 13.e4 b5 14.Bf4 Rc8 15.Qd2 Nh5=; B2) 12.Rc2 b5 (12...Nbd7 13.Bd3 b5 14.Bb2 Qa5 15.Qe2 Rac8= ; 12...Nc6 13.Bd3 Rc8 14.Bb2 b5 15.e4 b4=) 13.Bd3 Nc6 14.Qe2 Rc8 15.Rd1 Qa5=; B3) 12.Be2 Nbd7 (12...b5 13.Qd3 Nc6 14.e4 Rc8 15.Rd1 Na5= ; 12...Nc6 13.e4 Rc8 14.Qd3 Na5 15.Rc2 b5+=) 13.Rc2 Rc8 14.Bb2 b5 15.Qd2 Nb6+=; B4) 12.Qe2 Nbd7 (12...b5 13.Bd3 Nbd7 14.Rc2 Qa5 15.Bb2 Rfc8= ; 12...Qc7 13.Bb2 Rc8 14.Bd3 Bd6 15.Rc1 Nc6=) 13.Rc2 b5 14.Bd3 Qa5 15.Bb2 Rac8=; C) 11...Qc7 C1) 12.Ne5 Nc6 (12...Nbd7 13.Nb5 Qd8 14.Rc2 Be4 15.Rd2 a6= ) 13.Nb5 Qd8 14.Rc2 a6 15.Nc6 Bc6+=; C2) 12.Qe2 Rc8 (12...Bf3 13.gf3 Rc8 14.Bd3 Qd8 15.Bb2 a6= ) 13.Nd2 a6 14.Rc2 Bd6 15.f4 b5=; C3) 12.Nd2 Rd8 (12...Nc6 13.Rc2 Rfd8 14.Bd3 e5 15.Nf3 Qd7= ; 12...Rc8 13.Rc2 a6 14.Bd3 Nc6 15.Nce4 Ne4=) 13.Rc2 Nc6 14.Bd3 e5 15.Nf3 Qd7=.

11.Bb2 a6 A) 12.Qe2 Qd7 (12...Nbd7 13.Bd3 b5 14.Rfc1 Rc8 15.e4 Nb6= ; 12...b5 13.Bd3 Nc6 14.Rfc1 Rc8 15.a4 b4=) 13.Rac1 b5 14.Bd3 Bd6 15.Rfd1 Qe7=; B) 12.Rc1 Nc6 (12...b5 13.Bd3 Nbd7 14.e4 Rc8 15.Qb3 Nb6= ; 12...Bd6 13.Bd3 Qe7 14.a4 Nc6 15.e4 Bf4=) 13.Bd3 Rc8 14.Qc2 Na5 15.Qe2 b5=; C) 12.Rb1 Nbd7 (12...b5 13.Bd3 Qa5 14.Qe1 Bf3 15.Nd5 Qd8=; 12...Nc6 13.Bd3 b5 14.Qe2 Rc8 15.Rfc1 Bd6=) 13.Bd3 b5 14.e4 Rc8 15.Qc2 Nb6=; D) 12.Bd3 Nc6 (12...b5 13.Qe2 Nc6 14.Rfc1 Rc8 15.a4 b4= ; 12...Nbd7 13.Qe2 b5 14.Rfc1 Rc8 15.Nd2 e5=) 13.Qe2 b5 14.Rfc1 Rc8 15.Rab1 Qd7=.

11.Bb2 Nc6 A) 12.Rc1 a6 (12...Rc8 13.Qe2 Na5 14.Bd3 Nb3 15.Rc2 Bd6= ; 12...Na5 13.Bd3 Rc8 14.Ne5 a6 15.a4 Nc6=) 13.Bd3 Rc8 14.Qc2 Na5 15.Ne5 b5=; B) 12.Bd3 a6 (12...Qd6 13.Rc1 Rfd8 14.Qe2 a6 15.e4 Qf4= ; 12...Rc8 13.Rc1 Na5 14.Qe2 Nb3 15.Rc2 Bd6=) 13.Qe2 b5 14.Rfc1 Rc8 15.Rc2 Qa5=; C) 12.e4 Rc8 (12...a6 13.Re1 Rc8 14.Ba2 Re8 15.d5 ed5= ; 12...Na5 13.Bd3 Rc8 14.Qe2 Nh5 15.Qe3 Nf6=) 13.Qd3 Qc7 14.d5 Rfd8 15.Rfe1 Ne5=; D) 12.Qe2 Rc8 (12...Na5 13.Bd3 Nb3 14.Rad1 Rc8 15.Ne5 Bd6=) 13.Rfd1 Na5 14.Bd3 Qd6 15.e4 Qf4=.

11.Bb2 Qc7 A) 12.Qe2 Rc8 13.Bd3 Nc6 14.Rfc1 a6 15.Rc2 Qd8=; B) 12.Bb5 Nc6 (12...Rc8 13.Rc1 Qd8 14.Bd3 Nc6 15.e4 a6= ; 12...Nbd7 13.Rc1 Qd6 14.Bd3 Rac8 15.Qe2 Rfd8=) 13.Rc1 Rac8 14.e4 a6 15.Bc6 Bc6=; C) 12.Be2 Rd8 (12...Nc6 13.Rc1 Rfd8 14.Qd3 a6 15.Ne4 Rac8=; 12...Rc8 13.Rc1 Qd8 14.Qd3 Qf8 15.a4 Nbd7=) 13.Nb5 Qc8 14.Rc1 Nc6 15.Qb3 a6=; D) 12.Bd3 Nc6 (12...Rc8 13.Rc1 Qd8 14.e4 Nc6 15.Re1 Nd4+= ) 13.Rc1 Qd6 14.Qe2 Rfd8 15.e4 Ng4+=.

11.Bb2 Nbd7 12.Rb1 (12.Rc1 Re8 (12...a6 13.a4 Rc8 14.Qd3 Nb8 15.e4 Qc7=; 12...Rc8 13.Bd3 a6 14.a4 Rc7 15.e4 Bb4=) 13.Bd3 a6 14.Qe2 b5 15.Ne5 Rc8=; 12.Bd3 a6 (12...Rc8 13.Qe2 Nd5 14.Nd5 Bd5 15.e4 Bb7+=; 12...Re8 13.Qe2 a6 14.Rfc1 b5 15.e4 Rc8=) 13.Qe2 b5 14.Rfc1 Rc8 15.Nd2 e5=; 12.Qe2 Rc8 (12...a6 13.a4 Bd6 14.e4 Bb4 15.Bd3 Qc7=; 12...Re8 13.Bd3 a6 14.Rfc1 b5 15.e4 Rc8=) 13.Ba6 Qc7 14.Bd3 Qb8 15.Rfd1 Rfd8=) 12...Rc8 (12...a6 13.Bd3 b5 14.e4 Rc8 15.Qc2 Nb6=; 12...Re8 13.Bd3 a6 14.Qe2 Bd6 15.e4 Nh5=) 13.Bd3 Nd5 (13...a6 14.a4 (14.e4= b5 15.Qc2 Nb6=) 14...Rc7 15.Qe2 Qa8=) 14.Nd5 Bd5 15.e4 Bb7 16.Qe2 Nf6 17.Rfc1 Rc1 18.Rc1 Qd7 (18...Qa8 19.Nd2=) 19.Ne5+= Qa4? (better is 19...Qd6+=) 20.Rc7+– Bb4? (20...Ba3 21.Bc2 Qa5 22.Ba3 Qa3 23.Rb7 Qa1 24.Qd1 Qd1 25.Bd1 Ne4 26.Ra7 Rc8+–) 21.Bc2 (21.ab4?! Be4 22.Be4 Ne4+–) 21...Qa6 (21...Ba6 A) 22.ab4?! Qb4 (22...Be2?? 23.Ba4 Ne4 24.Bc6+–) 23.Bd3 Bd3 24.Nd3 Qa4+–; B) 22.Qf3 Qa5 23.ab4 Qb4 24.Bc3+–) 22.Qa6 Ba6 23.ab4 g6 (23...Rc8 24.Rc8 Bc8+–) 24.Ra7 Be2 (24...Bb5 25.d5! ed5 26.ed5+–) 25.d5! 1–0. market (1945) – NN, GameColony.com, 2002. (=1.b4 Nf6 2.Nf3 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7)

11.Bb2 Re8 A) 12.Qe2 Nbd7 (12...Nc6 13.Rfd1 Rc8 14.Rac1 Bd6 15.e4 Bf4+= ; 12...a6 13.Rfc1 Nbd7 14.a4 Bd6 15.e4 e5+=) 13.Rac1 a6 14.a4 Bd6 15.e4 Nd5=; B) 12.Rc1 Nbd7 (12...a6 13.Bd3 b5 14.e4 Nc6 15.e5 Nd7= ; 12...Nc6 13.d5 Na5 14.Bb5 Rf8 15.de6 fe6+=) 13.Qe2 a6 14.a4 Bd6 15.e4 Nd5=; C) 12.Bb5 Nbd7 (12...Bc6 13.Ne5 Bb5 14.Nb5 Na6 15.Rc1 Qd5+=; 12...Rf8 13.Qe2 a6 14.Bd3 b5 15.Rfc1 Qd6+=) 13.Ne5 Bd6 14.Nd7 Nd7 15.Qa4 Re7=; D) 12.Bd3 a6 (12...Nc6 13.Rc1 Rc8 14.Qe2 Bd6 15.Rfd1 Be7+= ; 12...Nbd7 13.Rc1 a6 14.e4 Rc8 15.Qc2 Nh5=) 13.Qe2 b5 14.Rfc1 Nbd7 15.e4 Rc8=.

11.Bb5 A) 11...a6 A1) 12.Be2 Nbd7 (12...Bd6 13.Qd3 Qc7 14.e4 Rc8 15.Bd2 Nfd7+= ; 12...Nc6 13.e4 Rc8 14.Qd3 Na5 15.Rb1 b5+=) 13.Bd3 Rc8 14.Bb2 b5 15.Qe2 Qa5+=; A2) 12.Bd3 Nc6 (12...b5 13.Bb2 Nc6 14.Rc1 b4 15.ab4 Nb4= ; 12...Nbd7 13.Bb2 b5 14.Qe2 Rc8 15.Rfc1 Nb6= ) 13.Bb2 Rc8 14.Qe2 b5 15.Rfc1 Na5=; B) 11...Nbd7 B1) 12.Qe2 a6 (12...Bd6 13.e4 a6 14.Bd3 e5 15.d5 Rc8=; 12...Qc7 13.Bb2 a6 14.Bd3 Bd6 15.e4 Bf4=) 13.Bd3 b5 14.Bb2 Rc8 15.Rfc1 Bd6=; B2) 12.Bb2 Nd5 (12...a6 13.Bd3 Rc8 14.e4 b5 15.Qe2 Nb6= ; 12...Bd6 13.Bd3 Rc8 14.Qe2 Bc6 15.Rfc1 Qe7=) 13.Rc1 N7f6 14.Nd5 Qd5 15.Qe2 Rac8=; B3) 12.Bd2 a6 (12...Rc8 13.Qe2 Bd6 14.e4 e5 15.Bd7 Nd7+=; 12...Qc7 13.Qe2 a6 14.Bd3 e5 15.Rfc1 Qd6=) 13.Bd3 Nc5 14.Bc2 Nce4 15.Ne4 Ne4=; B4) 12.Bd3 Rc8 (12...a6 13.Bb2 Rc8 14.e4 b5 15.Qe2 Nb6= ; 12...Re8 13.Bb2 a6 14.Qe2 b5 15.Rfc1 Rc8=) 13.Bb2 a6 14.e4 b5 15.Qe2 Nb6=; C) 11...Qc7 C1) 12.Bd2 Nc6 (12...Rd8 13.Bd3 Nc6 14.Qb1 Qd7 15.Rc1 Rac8= ; 12...Rc8 13.Bd3 Nc6 14.Qe2 Qd7 15.Rfc1 Na5=) 13.Qe2 Rfd8 14.Rfc1 a6 15.Bd3 Qd7=; C2) 12.Bb2 Rc8 (12...Nc6 13.Rc1 a6 14.Bd3 Qd6 15.Qe2 b5= ; 12...Nbd7 13.Rc1 Qd6 14.Bd3 Rac8 15.Qe2 Rfd8= ) 13.Rc1 Qd8 14.Qe2 a6 15.Bd3 b5=; D) 11...Ne4 D1) 12.Ne4 Be4 13.Nd2 Bb7 14.Bd3 Nd7 15.Qe2 Rc8=; D2) 12.Bd2 a6 (12...Nd2 13.Nd2 Qc7 14.Qb3 Nc6 15.Rfc1 Rfc8= ; 12...Nd7 13.Ne4 Be4 14.Bb4 Nf6 15.Nd2 Bb7=) 13.Bd3 Nd2 14.Nd2 Nd7 15.Qc2 Nf6=; D3) 12.Bb2 Nd7 (12...Nc3 13.Bc3 Bd6 14.Bd3 Qe7 15.Bb2 Nd7= ; 12...Bd6 13.Rc1 Qf6 14.Ne4 Be4 15.Bd3 Qg6+=) 13.Ne4 Be4 14.Nd2 Bb7 15.Rc1 Nf6=; E) 11...Nc6 E1) 12.Qe2 a6 (12...Qd6 13.a4 Qc7 14.Ba3 Ba3 15.Ra3 Rac8= ; 12...Rc8 13.Rd1 Na5 14.Bb2 Nb3 15.Rab1 Nd5=) 13.Bd3 b5 14.Bb2 Rc8 15.Rfc1 Na5=; E2) 12.Qa4 Na5 (12...Rc8 13.Rd1 Na5 14.Bd2 a6 15.Be2 Bc6+= ; 12...Qd6 13.Ba6 Ba6 14.Qa6 Rac8 15.Bb2 Rfd8= ) 13.Ne5 Bd6 14.Rd1 a6 15.Bd3 Rc8+=; E3) 12.Rb1 Rc8 (12...a6 13.Bd3 Rc8 14.Bb2 b5 15.Qe2 Bd6= ; 12...Qc7 13.Bb2 Rfd8 14.Qe2 a6 15.Bd3 e5=) 13.Qd3 Nb8 14.Ne5 a6 15.Ba4 Qc7+=; E4) 12.Bb2 a6 (12...Rc8 13.Qe2 Qc7 14.e4 Na5 15.Bd3 Qf4= ; 12...Qc7 13.Rc1 a6 14.Bd3 Qd6 15.Qe2 Rfd8=) 13.Bd3 Rc8 14.Qe2 b5 15.Rfc1 Na5=.

11.Bd2 A) 11...a6 A1) 12.Qe2 b5 (12...Nc6 13.Bd3 b5 14.Rfc1 Rc8 15.Ne4 Ne4= ; 12...Nbd7 13.Rfc1 b5 14.Bd3 Rc8 15.e4 Nb6=) 13.Bd3 Nc6 14.Ne4 e5 15.de5 Ne5=; A2) 12.a4 Bd6 (12...Qd6 13.Qe2 Nc6 14.Rab1 Rfc8 15.Bd3 Nd7= ; 12...Nc6 13.Rc1 Qd6 14.Rb1 Qc7 15.Be2 Rac8=) 13.Qe2 Nc6 14.Rab1 Qc7 15.Rfc1 Ba3=; A3) 12.Be2 b5 (12...Nc6 13.Qb1 Rc8 14.Rc1 b5 15.Bd3 Na5= ; 12...Nbd7 13.Qb1 Rc8 14.Rc1 b5 15.e4 Nb6=) 13.Qb1 Nc6 14.Ne4 Ne4 15.Qe4 Na5=; A4) 12.Bd3 b5 (12...Nc6 13.Qb1 Rc8 14.Rc1 Na5 15.Ne2 Rc1= ; 12...Nbd7 13.Qe2 b5 14.Rfc1 Rc8 15.e4 Nb6=) 13.Qe2 Nc6 14.Rfc1 Na5 15.Rcb1 Nc6=; B) 11...Nbd7 B1) 12.Be2 Rc8 (12...a6 13.Qb1 Rc8 14.e4 b5 15.Bd3 Re8+/–; 12...Re8 13.Qb3 a6 14.Rfc1 Bd6 15.Ra2 Qe7=) 13.Qb3 a6 14.Rfc1 Bd6 15.Ng5 Qe7=; B2) 12.Bb5 Qc7 (12...Rc8 13.Qe2 Rc7 14.Rfc1 Qa8 15.e4 a6= ; 12...a6 13.Bd3 Nc5 14.Bc2 Nce4 15.Ne4 Ne4=) 13.Qe2 a6 14.Bd3 e5 15.Rfc1 Qd6=; B3) 12.Qe2 Re8 (12...Rc8 13.Ba6 Ba6 14.Qa6 Ra8 15.Rfc1 Nb8+= ; 12...a6 13.Rfc1 b5 14.Bd3 Rc8 15.e4 Nb6= ) 13.Rfc1 Rc8 14.e4 Rc4 15.Qc4 Ne4=; B4) 12.Bd3 Nc5 13.Bc2 Nce4 14.Ne4 Be4 15.Be4 Ne4=; C) 11...Qc7 C1) 12.Qe2 Nc6 (12...Rc8 13.Bd3 Nc6 14.e4 Qd7 15.e5 Nd5= ; 12...a6 13.Rfc1 Rc8 14.Bd3 Qd8 15.e4 b5= ) 13.Rfc1 Qd7 14.Kh1 Rac8 15.Bb5 Qd6=; C2) 12.Be2 Nc6 (12...Rc8 13.Qb3 Nc6 14.Rfc1 Qd7 15.Rab1 Bd6= ; 12...a6 13.Qb1 Nc6 14.Rc1 Rfd8 15.Na4 Nd7=) 13.e4 Rfd8 14.Qa4 a6 15.e5 Nd5=; C3) 12.Bb5 Rd8 (12...Nc6 13.Bd3 Rfd8 14.Qb1 Qd7 15.Rc1 Rac8= ; 12...Rc8 13.Qe2 Qd8 14.Rfc1 Nc6 15.Bd3 Na5=) 13.Qe2 Ng4 14.e4 Nc6 15.Bc6 Bc6=; C4) 12.Bd3 Nc6 (12...Rc8 13.e4 Qd7 14.Qb1 h6 15.Rc1 Qd8+= ) 13.Qb1 Qd7 14.Rc1 Rfd8 15.Ne4 Nd5=; D) 11...Re8 D1) 12.Qe2 a6 (12...Nc6 13.Bd3 Rc8 14.Rfc1 Qd7 15.Ne4 Ne4= ) 13.e4 Nc6 14.e5 Ng4 15.h3 Nd4=; D2) 12.Re1 a6 (12...Nc6 13.Qb1 Rc8 14.Bd3 Qd7 15.Rc1 Red8=; 12...Nbd7 13.e4 Rc8 14.Qb3 Qc7 15.Bd3 Red8=) 13.e4 b5 14.Bd3 Nc6 15.e5 Nd7=; D3) 12.Bb5 Nbd7 (12...Nc6 13.Ne5 Qc7 14.Rc1 Ne5 15.Nd5 Qd6= ; 12...Bc6 13.Ne5 Bb5 14.Nb5 Nd5 15.e4 Nf6+=) 13.Ne5 Bd6 14.Nd7 Nd7 15.Qa4 Re7=; D4) 12.Bd3 a6 (12...Nc6 13.Qb1 Rc8 14.Rc1 Na5 15.e4 Nc4+= ; 12...Ba6 13.Ba6 Na6 14.e4 Nc7 15.Qe2 a6=) 13.Qe2 Nc6 14.Rfc1 Na5 15.Rcb1 Nc6=; E) 11...Nc6 E1) 12.Qb1 Qd7 (12...Na5 13.Be2 Rc8 14.Ne5 Nc6 15.Rd1 Nd4= ; 12...Rc8 13.Bd3 Na5 14.Ne5 Bd6 15.Nb5 Be5+=) 13.Rc1 Rfd8 14.Ne2 Rac8 15.Bb4 Nb4=; E2) 12.Bd3 Rc8 (12...e5 13.Re1 Re8 14.Ne4 ed4 15.ed4 Nd4= ) 13.Qc2 Qd7 14.Rfc1 Rfd8 15.Ng5 g6=; E3) 12.Qa4 a6 (12...Qd6 13.Rfb1 Rfd8 14.Rb3 Qc7 15.Bd3 a6= ; 12...Qd7 13.Rab1 Nb8 14.Qd7 Nbd7 15.Rb3 Rfd8= ) 13.Bd3 e5 14.Rfe1 Re8 15.Ne4 Rc8+=; E4) 12.Qc2 a6 (12...Na5 13.Be2 Rc8 14.Rfc1 a6 15.Ne5 Ne4= ; 12...Rc8 13.Bd3 Qd6 14.Qb1 Qd7 15.d5 Nb8=) 13.Bd3 Rc8 14.Rfc1 Na5 15.Ne5 b5=.

11.Bd3 A) 11...Nbd7 A1) 12.Bb2 a6 (12...Rc8 13.Qe2 Re8 14.Rfc1 Bd6 15.Nb5 Rc1+=; 12...Re8 13.Qe2 a6 14.Rfc1 b5 15.e4 Rc8=) 13.Qe2 b5 14.Rfc1 Rc8 15.Nd2 e5=; A2) 12.Qe2 Rc8 (12...a6 13.e4 Rc8 14.Bd2 b5 15.Rfc1 Nb6=; 12...Re8 13.Bd2 a6 14.Rfc1 b5 15.e4 Rc8=) 13.Bd2 Bf3 14.Qf3 Ne5 15.de5 Qd3=; A3) 12.Ra2 Rc8 (12...a6 13.Rc2 b5 14.Qe2 Qa5 15.Bb2 Rac8=; 12...Bc6 13.Rc2 a6 14.a4 Nd5 15.Nd5 Bd5=) 13.Rc2 Bf3 14.Qf3 Ne5 15.Qe2 Nd3=; A4) 12.e4 a6 (12...Re8 13.Bf4 Rc8 14.Qd2 Nh5 15.Be3 f5+=; 12...Rc8 13.Bb2 a6 14.Rc1 b5 15.Qc2 h6=) 13.Qe2 Rc8 14.Bd2 b5 15.Rfc1 Nb6=; B) 11...a6 B1) 12.Bb2 b5 (12...Nbd7 13.Qe2 b5 14.Rfc1 Rc8 15.e4 Nb6=; 12...Nc6 13.Qe2 b5 14.Rfc1 Na5 15.Nd2 Qd7=) 13.Qe2 Nc6 14.Rfc1 Rc8 15.a4 b4=; B2) 12.Rb1 b5 (12...Nbd7 13.e4 Rc8 14.Rb3 b5 15.Qc2 Ng4=; 12...Qc7 13.Bb2 Rc8 14.Rc1 Qd8 15.e4 Nc6=) 13.e4 Nc6 14.Bb2 Rc8 15.Re1 Na5=; B3) 12.e4 Nc6 13.Be3 Rc8 14.e5 Ng4 15.Qc2 h6=; B4) 12.Qe2 Nc6 (12...Nbd7 13.e4 Rc8 14.Bd2 b5 15.Rfc1 Nb6=; 12...b5 13.e4 Qc7 14.Bb2 Rd8 15.Qc2 Nc6=) 13.Bb2 b5 14.Rfc1 Rc8 15.Rc2 Qa5=; C) 11...Re8 C1) 12.Qe2 Nbd7 (12...Nc6 13.Bb2 Rc8 14.Rac1 Qd7 15.Rc2 Bd6+=; 12...a6 13.Bb2 b5 14.Rfc1 Nbd7 15.e4 Rc8=) 13.Bb2 a6 14.Rfc1 b5 15.e4 Rc8=; C2) 12.e4 Nc6 13.Be3 Rc8 14.e5 Ng4 15.Qb1 Nce5=; C3) 12.Bd2 Nc6 (12...a6 13.Qe2 Nc6 14.Rfb1 b5 15.Ne4 e5=; 12...Rf8 13.Qe2 Nc6 14.Ne4 e5 15.de5 Ne5=) 13.Qe2 Bd6 14.Nb5 Bb8 15.Rab1 e5=; C4) 12.Bb2 Nbd7 (12...Nc6 13.Qc2 Rc8 14.Rfc1 a6 15.Qe2 b5=; 12...Ba6 13.Rc1 Bd3 14.Qd3 Nbd7 15.Rfd1 a6+=) 13.Qe2 a6 14.Rfc1 b5 15.e4 Rc8=; D) 11...Ba6 D1) 12.Bb2 Bd3 13.Qd3 Nc6 14.Rfd1 Rc8 15.e4 Na5=; D2) 12.Rb1 Bd3 13.Qd3 Nbd7 14.Rd1 Re8 15.Bb2 a6+=; D3) 12.Re1 Bd3 (12...Qc7 13.Bb2 Bd3 14.Qd3 Nc6 15.e4 Na5=; 12...Bb7 13.e4 Nc6 14.e5 Nd5 15.Nd5 Qd5=) 13.Qd3 Nbd7 14.e4 Rc8 15.Bd2 Nc5=; D4) 12.e4 Qc7 (12...Qd7 13.Ba6 Na6 14.Ne5 Qc7 15.Qf3 Rfc8+=; 12...Bd3 13.Qd3 Nbd7 14.Bf4 Rc8 15.Rfc1 Nc5+=) 13.Bb2 Rc8 14.d5 Bd3 15.Qd3 Nbd7+=; E) 11...Nc6 E1) 12.Qe2 Na5 (12...Qd6 13.Bb2 Rfc8 14.Rfc1 a6 15.Rc2 b5=; 12...Rc8 13.Bb2 Qd7 14.Rfc1 Rfd8 15.Ne4 Ne4=) 13.Rb1 Rc8 14.Bb2 Bf3 15.Qf3 Nc4=; E2) 12.Qc2 a6 (12...Qd6 13.Bb2 Rfc8 14.Rfc1 Na5 15.e4 Qf4=; 12...Rc8 13.Bb2 Na5 14.Ne5 Qd6 15.Qa4 Rfd8=) 13.Rb1 Rc8 14.Bb2 b5 15.Rfc1 b4=; E3) 12.Ng5 Rc8 (12...e5 13.d5 Na5 14.Bb2 Rc8 15.Qe2 Bd5=; 12...Qc7 13.Bb2 Rfd8 14.Rc1 Rac8 15.Nge4 Ne4=) 13.Bb2 h6 14.Nf3 a6 15.Qe2 b5=; E4) 12.Bb2 Rc8 (12...a6 13.Qe2 Qd7 14.Rfc1 Rfd8 15.Rc2 e5=; 12...Qd6 13.Rc1 Rfd8 14.Qe2 Rac8 15.Rc2 Na5=) 13.Qe2 Na5 14.Rab1 Bf3 15.Qf3 Nc4=.

11.Qe2 A) 11...Nbd7 A1) 12.Bb2 a6 (12...Nd5 13.Rfc1 N7f6 14.Ne5 Rc8 15.Nd5 Bd5=; 12...Rc8 13.Ba6 Qc7 14.Rac1 Ba6 15.Qa6 Nb8=) 13.Bd3 b5 14.Rfc1 Rc8 15.e4 Nb6=; A2) 12.Bd3 Rc8 (12...a6 13.e4 Rc8 14.Bd2 b5 15.Rfc1 Nb6=; 12...Re8 13.e4 Rc8 14.Bd2 Nb8 15.Rfc1 a6+=) 13.Bd2 Bf3 14.Qf3 Ne5 15.de5 Qd3=; A3) 12.e4 Rc8 (12...Qc7 13.Nd2 Ba6 14.Nb5 Bb5 15.Bb5 Bd6+=) 13.Nd2 a6 14.Bb2 b5 15.Bd3 Nb6=; A4) 12.Bd2 a6 (12...Rc8 13.Ba6 Ba6 14.Qa6 Rc7 15.Nb5 Nb8+=; 12...Ne4 13.Ne4 Be4 14.Bb4 Rc8 15.Rfc1 Nf6+=) 13.Rfc1 b5 14.Bd3 Rc8 15.e4 Nb6=; B) 11...Qc7 B1) 12.Bd2 Nc6 (12...Rc8 13.Bd3 Nc6 14.e4 Qd7 15.e5 Nd5=; 12...a6 13.Rfc1 Nc6 14.Bd3 Qd7 15.Na4 Bd8+=) 13.Rfc1 Qd7 14.Ne5 Ne5 15.de5 Ng4=; B2) 12.Bb2 Rc8 (12...a6 13.Bd3 Nc6 14.Rac1 Rfc8 15.Ne4 Ne4+=) 13.Bd3 Nc6 14.Rac1 a6 15.Ne4 Nd5+=; C) 11...a6 C1) 12.e4 Re8 (12...b5 13.Bd3 Qc7 14.Bb2 Rc8 15.Rfc1 Qf4=; 12...Qc7 13.Bd2 Rd8 14.Rfc1 Nc6 15.Bd3 Ng4=) 13.Rd1 b5 14.Bd3 Qc7 15.Bb2 Qf4=; C2) 12.Bb2 b5 (12...Nbd7 13.Bd3 b5 14.Rfc1 Rc8 15.e4 Nb6=; 12...Qd7 13.Bd3 Nc6 14.Rfc1 Rfc8 15.Rab1 Bd6=) 13.Bd3 Nc6 14.Rfc1 Rc8 15.a4 b4=; C3) 12.Rd1 Nbd7 (12...b5 13.Bd3 Nbd7 14.Bb2 Rc8 15.e4 Nb6=; 12...Qc7 13.Bb2 b5 14.Bd3 Rc8 15.Rdc1 Nc6=) 13.d5 ed5 14.Nd5 b5 15.Bb3 Bd5=; C4) 12.Bd3 Nc6 (12...Nbd7 13.e4 Rc8 14.Bd2 b5 15.Rfc1 Nb6=; 12...Qd7 13.Ne5 Qc7 14.Bb2 b5 15.Rac1 Qd6=) 13.Rb1 b5 14.Bb2 Rc8 15.Rfc1 Qa5=; D) 11...Nc6 D1) 12.Bd3 Qd6 (12...Rc8 13.Bb2 Qd6 14.Rac1 Rfd8 15.Rc2 Na5=; 12...Rb8 13.Bb2 Rc8 14.Rfc1 Qd7 15.Rc2 Rfd8=) 13.Bb2 Rac8 14.Rac1 Rfd8 15.Rc2 Na5=; D2) 12.Rb1 Rc8 (12...Qc7 13.Bb2 Rac8 14.Bd3 Rfd8 15.Rfc1 Qd7=; 12...Qd6 13.Bb2 Rac8 14.Rfd1 Nd5 15.Nd5 ed5=) 13.Bb2 Qc7 14.Bd3 Rfd8 15.Rfc1 Qd7=; D3) 12.Ra2 a6 (12...Na5 13.Bd3 Rc8 14.Rc2 Nb3 15.Bb2 Bd6=; 12...Rc8 13.Rc2 Bd6 14.e4 Na5 15.Ba2 Re8+=) 13.Bd3 b5 14.Rc2 Rc8 15.Rd1 Qa5=; D4) 12.Bb2 Rc8 (12...Na5 13.Bd3 Rc8 14.Rac1 Nb3 15.Rc2 Bd6=; 12...Bd6 13.e4 Na5 14.Ba2 Nh5 15.Rfd1 Nf4=) 13.Rfd1 Na5 14.Bd3 Qd6 15.e4 Qf4=.

11.Be2 A) 11...Nbd7 A1) 12.Bb2 Rc8 (12...a6 13.Bd3 b5 14.Qe2 Rc8 15.Rfc1 Nb6= ; 12...Rb8 13.Rc1 a6 14.Rc2 b5 15.Qd3 Bf3=) 13.Rc1 a6 14.Bd3 b5 15.e4 Nb6=; A2) 12.Bd2 Rc8 (12...a6 13.Qb1 Rc8 14.e4 e5 15.d5 Bc5=; 12...Rb8 13.Qb3 a6 14.Rac1 b5 15.Rc2 Nb6=) 13.Qa4 a6 14.Rfc1 b5 15.Qb3 Nb6+=; A3) 12.Rb1 a6 (12...Rc8 13.Bb2 a6 14.Bd3 b5 15.e4 Nb6=; 12...Ne4 13.Ne4 Be4 14.Bd3 Nf6 15.Be4 Ne4=) 13.Qd3 Rc8 14.e4 Qc7 15.Bd2 Rfd8=; A4) 12.Qb3 Nd5 (12...a6 13.Bb2 Rc8 14.Rfc1 b5 15.Rc2 Nd5= ; 12...Ne4 13.Ne4 Be4 14.Bd2 Nf6 15.Bb4 Bd5=) 13.Bd2 Rc8 14.Rfc1 N7f6 15.Nd5 Bd5=; B) 11...a6 B1) 12.Qd3 Nc6 (12...Nd5 13.Nd5 Qd5 14.Bd2 Rd8 15.Rfc1 e5= ; 12...Qc7 13.e4 b5 14.e5 Nd5 15.Nd5 Bd5=) 13.e4 Rc8 14.Bf4 Na7 15.e5 Nd5=; B2) 12.Qb3 b5 (12...Nbd7 13.Bb2 Rc8 14.Rfc1 b5 15.Rc2 Nd5= ; 12...Bd6 13.a4 Nbd7 14.Ba3 Ba3 15.Ra3 Rc8=) 13.Bb2 Nc6 14.Rac1 Rc8 15.Rfd1 Bd6=; B3) 12.Bb2 Nbd7 (12...b5 13.Rc1 Nbd7 14.Qb3 Nd5 15.Bd3 N7f6= ; 12...Nc6 13.e4 Na7 14.Bd3 Rc8 15.Qb1 h6=) 13.Bd3 b5 14.Qe2 Rc8 15.Rfc1 Bd6=; C) 11...Re8 C1) 12.Rb1 Nbd7 (12...Nc6 13.e4 Rc8 14.Qd3 Na5 15.Ne5 Qc7= ; 12...a6 13.Qd3 Nbd7 14.e4 Rc8 15.e5 Ng4+= ) 13.Bb2 Rc8 14.Qb3 a6 15.Rfc1 Bd6=; C2) 12.Bb2 a6 (12...Nc6 13.Qd3 a6 14.e4 Rc8 15.Rfd1 Na5= ; 12...Nbd7 13.Rc1 a6 14.a4 Bd6 15.Qd3 e5= ) 13.Qd3 b5 14.Rfc1 Nc6 15.e4 Na5=; C3) 12.Qc2 Nbd7 (12...Qc7 13.Bb2 Rc8 14.Rfc1 Nbd7 15.Qd3 Bc6= ; 12...Ba6 13.e4 Be2 14.Qe2 Nc6 15.Rd1 Qc7=) 13.e4 Rc8 14.Qd3 Qc7 15.Bd2 Red8=; C4) 12.Qd3 Nd5 (12...Ba6 13.Nb5 Qd5 14.Bd2 Nc6 15.Qb1 Qd7= ; 12...Nc6 13.e4 Rc8 14.Be3 a6 15.Rfc1 Na5=) 13.Bd2 Nc3 14.Bc3 Ba6 15.Qc2 Be2=; D) 11...Qc7 D1) 12.Bb2 Rd8 (12...Nc6 13.Rc1 Rfd8 14.Bd3 Qd7 15.Qe2 Rac8= ; 12...Rc8 13.Rc1 Qd8 14.Qd3 Qf8 15.a4 Nbd7=) 13.Nb5 Qc8 14.Rc1 Nc6 15.Qb3 a6=; D2) 12.Qb3 Rd8 (12...Nc6 13.Bb2 Rac8 14.Rac1 Rfd8 15.Rfd1 a6= ; 12...a6 13.Bb2 Nc6 14.Rfc1 b5 15.Rab1 Rac8=) 13.Bd2 Nc6 14.Nb5 Qd7 15.Rfc1 a6=; D3) 12.Qd2 Rc8 (12...a6 13.Bb2 Rd8 14.Rfc1 Nc6 15.Rc2 b5= ; 12...Rd8 13.Bb2 Nc6 14.Rac1 Rac8 15.Rc2 e5=) 13.Bb2 Nbd7 14.Qd3 a6 15.Rac1 Qd8=; D4) 12.Qd3 Rc8 (12...a6 13.e4 Rc8 14.Bd2 b5 15.Rfc1 Nc6= ; 12...Nbd7 13.Bb2 Qd8 14.e4 a6 15.Rac1 Rc8=) 13.Bb2 Nc6 14.Rac1 Qd8 15.e4 Na5=; E) 11...Nc6 E1) 12.Qd3 Na5 (12...Rc8 13.e4 Na5 14.Bf4 Nh5 15.Bd2 Nc4+= ; 12...Qd7 13.e4 Rac8 14.Rd1 Na5 15.Bf4 Qc6=) 13.Rb1 Rc8 14.Ne5 Nd7 15.Rd1 Ne5+=; E2) 12.e4 Rc8 (12...Na5 13.Qd3 Rc8 14.Bf4 Nh5 15.Bd2 Nb3= ; 12...Qc7 13.Qd3 Rac8 14.Bb2 Na5 15.Rac1 Nb3= ) 13.Qd3 Na5 14.Bf4 Nh5 15.Bd2 Nb3+=; E3) 12.Qc2 Rc8 (12...Na5 13.Ne5 Rc8 14.Bd3 a6 15.Bb2 b5= ; 12...Rb8 13.Bd3 Rc8 14.Bb2 Bd6 15.Rfc1 a6=) 13.Bb2 a6 14.Rfc1 b5 15.Rab1 Na5=; E4) 12.Bb2 Rc8 (12...a6 13.Qd3 Rc8 14.e4 Na7 15.Qe3 Ng4= ; 12...Qd7 13.Rc1 Rfd8 14.Qc2 Rac8 15.Rfd1 Bd6= ) 13.Rc1 a6 14.Bd3 b5 15.Qe2 Qa5=.

10.c4 Na6 A) 11.Qe2 A1) 11...dc4 12.Nc4 (12.Bc4 Nc7 13.e4 Rc8 14.Rd1 Bc6 15.Bb2= ) 12...Nc7 13.e4 Rc8 14.Nce5 Nce8 15.Bf4=; A2) 11...Nb8 12.Bb2 (12.e4 de4 13.Ne4 Be4 14.Be4 Ne4 15.Qe4= ; 12.cd5 Nd5 13.Nb3 Bd6 14.e4 Nf4 15.Bf4=) 12...dc4 13.Nc4 Nbd7 14.e4 a6 15.a4=; A3) 11...Nc7 12.Bb2 (12.Rb1 dc4 13.Nc4 Be4 14.Be4 Ne4 15.Qc2= ; 12.e4 de4 13.Ne4 Be4 14.Be4 Ne4 15.Qe4=) 12...dc4 13.Nc4 Be4 14.Rac1 Ncd5 15.Nce5=; B) 11.Bb2 B1) 11...dc4 12.Bc4 (12.Nc4 Nc7 13.Nce5 Rc8 14.Rc1 Qd5 15.Qe2= ) 12...Nc7 13.Qe2 Rc8 14.Rfc1 a6 15.Bd3= ; B2) 11...Rc8 12.cd5 (12.Rc1 dc4 13.Nc4 b5 14.Nce5 Rc1 15.Bc1= ; 12.Qa4 Qe8 13.Qe8 Rfe8 14.cd5 Nd5 15.Rfc1=) 12...Qd5 13.e4 Qa5 14.Ne5 Nc7 15.Re1+=; B3) 11...Qe8 12.cd5 (12.Rc1 Rc8 13.cd5 Rc1 14.Qc1 Nd5 15.Qc2+= ; 12.Qe2 dc4 13.Nc4 Qa4 14.Rfc1 Be4 15.Nce5+=) 12...Nd5 13.Rc1 f5 14.Qe2 Nac7 15.Rc2+=; B4) 11...Nc7 12.cd5 (12.Rc1 dc4 13.Nc4 Rc8 14.Nce5 Qd5 15.Qe2= ; 12.Qe2 dc4 13.Nc4 Be4 14.Rac1 Ncd5 15.Be4=) 12...Ncd5 13.Rc1 Rc8 14.Qb3 a6 15.Ne5=; C) 11.Rb1 C1) 11...dc4 12.Bc4 (12.Nc4 Rc8 13.Qe2 Bf3 14.Qf3 Nc5 15.Bh7= ) 12...Ne4 13.Ba6 Nc3 14.Qb3 Ba6 15.Qc3+/–; C2) 11...Ne4 12.Qc2 (12.Bb2 Rc8 13.Qa4 Qe8 14.Qe8 Rfe8 15.Rfc1=; 12.Qb3 dc4 13.Bc4 Nc7 14.Bd3 Nd2 15.Nd2= ) 12...Nd2 13.Nd2 dc4 14.Nc4 Qd5 15.f3+=; C3) 11...Nc7 12.Re1 (12.Qe2 dc4 13.Nc4 Be4 14.Be4 Ne4 15.Qd3= ; 12.c5 Ba6 13.Ba6 Na6 14.Qa4 Nc7 15.Qc2=) 12...dc4 13.Nc4 Be4 14.Be4 Ne4 15.Qc2=; D) 11.Re1 D1) 11...Rc8 12.cd5 (12.Qb3 dc4 13.Bc4 Qc7 14.e4 Ne4 15.Re4= ; 12.Qa4 Qe8 13.Qb3 dc4 14.Bc4 Nc7 15.e4= ) 12...Nd5 13.Qb3 Rc3 14.Qb1 Nf6 15.e4=; D2) 11...Nc7 12.Bb2 (12.Rb1 dc4 13.Bc4 Qd7 14.e4 Rac8 15.Qb3= ; 12.cd5 Ncd5 13.Qb3 Rc8 14.Bb2 a6 15.Rec1=) 12...Rc8 13.Rc1 dc4 14.Nc4 Be4 15.Nce5=; D3) 11...dc4 12.Bc4 (12.Nc4 Rc8 13.Nce5 Ne4 14.Nd2 Nd2 15.Bd2= ) 12...Qd7 13.Bb2 Nc7 14.e4 b5 15.Bd3=; E) 11.cd5 E1) 11...Nd5 12.Bb2 (12.Qa4 Nac7 13.Ne5 a6 14.Qc2 f5 15.Ndc4= ; 12.Ne5 Rc8 13.Bb2 Bd6 14.Qh5 g6 15.Qe2=) 12...Nac7 13.Rc1 Rc8 14.Ne5 b5 15.Nb3+=; E2) 11...Qd5 12.Rb1 (12.Qe2 Qa5 13.Nc4 Qh5 14.Nce5 Nc7 15.Bb2= ; 12.e4 Qd8 13.Qe2 Nc7 14.Rb1 Rc8 15.Rd1+=) 12...Rfc8 13.e4 Qd7 14.Qe2 Nc7 15.Bb2+=.

10.c4 dc4 A) 11.Bc4 A1) 11...Nbd7 12.Qe2 (12.Bb2 a6 13.Bd3 b5 14.a4 b4 15.Rc1= ; 12.Bd3 Nc5 13.Bc2 Nce4 14.Ne4 Be4 15.Be4=) 12...Rc8 13.Bb2 Bd6 14.Rfc1 Ne4 15.Ne4=; A2) 11...a6 12.Bd3 (12.Qe2 Nc6 13.Bd3 b5 14.Bb2 Qd5 15.Rfc1= ; 12.Rb1 Nbd7 13.Qe2 b5 14.Bd3 Qa5 15.e4=) 12...Nc6 13.Qe2 Nd5 14.Bb2 Qd7 15.Rfc1=; A3) 11...Qc7 12.Bb2 (12.Qe2 Nc6 13.Bb2 Rfc8 14.Rfc1 Qd7 15.e4= ; 12.Rb1 Rc8 13.Bb2 a6 14.Bd3 Nbd7 15.Qe2=) 12...a6 13.Bd3 Nc6 14.Rc1 Rfc8 15.Ne4=; A4) 11...Nc6 12.Qe2 (12.Bb2 a6 13.Qe2 b5 14.Bd3 Qd5 15.Rfc1= ; 12.Bd3 Rc8 13.Bb2 Rc7 14.Qb1 Qd5 15.Ne4=) 12...a6 13.Bd3 b5 14.Bb2 Qd7 15.Rfc1=; B) 11.Nc4 B1) 11...Nc6 12.Qe2 (12.Rb1 Rc8 13.Bd2 Rc7 14.a4 Nd5 15.Nce5= ; 12.Qb3 Rc8 13.Rb1 Qd5 14.Rd1 Na5 15.Na5=) 12...a6 13.Rd1 b5 14.Nce5 Qa5 15.Bd2=; B2) 11...Nbd7 12.Bd2 (12.Nce5 Ne5 13.Ne5 Bd6 14.Nc4 Bc7 15.f3= ; 12.Bb2= Rc8 13.Qe2 Be4 14.Be4 Ne4 15.Rac1=) 12...Nc5 13.Be2 Nce4 14.Bb4 Bd5 15.Qd3=; B3) 11...Be4 12.Nce5 (12.Be4 Ne4 13.Nfe5 f6 14.Qf3 Qd5 15.Nd3= ; 12.Nfe5 Bd3 13.Qd3 Qd5 14.a4 Rc8 15.Ba3=) 12...Nbd7 13.Be4 Ne4 14.Nc6 Qe8 15.Qd3=; B4) 11...Qd5 12.Re1 (12.Bd2 Nc6 13.Qe2 Ne4 14.Rfc1 Rfc8 15.Be1=; 12.Qe2 Rd8 13.Nce5 Nbd7 14.Bc4 Qd6 15.a4= ) 12...Rc8 13.e4 Qd8 14.Qe2 Nbd7 15.Nce5=.

10.c4 Nc6 A) 11.Qe2 A1) 11...Rc8 12.Rb1 (12.Bb2 dc4 13.Nc4 Qd5 14.Rfc1 Rfd8 15.e4= ; 12.cd5 Qd5 13.e4 Qh5 14.Rb1 Rfd8 15.Bb2=) 12...Na5 13.cd5 Nd5 14.Bb2 Nc6 15.Rfc1=; A2) 11...a6 12.Rd1 (12.Bb2 dc4 13.Nc4 b5 14.Nce5 Ne5 15.de5= ; 12.cd5 Nd5 13.Bb2 Qd7 14.Rac1 Rfc8 15.Rc2=) 12...dc4 13.Nc4 b5 14.Nce5 Qa5 15.Bd2=; A3) 11...Qd7 12.Rd1 (12.cd5 Nd5 13.Nc4 Rac8 14.Bd2 Rfd8 15.Rfc1=; 12.Bb2 Rfc8 13.Rfc1 dc4 14.Nc4 Qd5 15.e4= ) 12...Rac8 13.Bb2 dc4 14.Nc4 Rc7 15.e4=; A4) 11...dc4 12.Nc4 (12.Bc4 Rc8 13.Bb2 Rc7 14.Rfc1 Qd7 15.Bb5= ) 12...Rc8 13.Rb1 Qd7 14.Rd1 Rfd8 15.Bb2= ; B) 11.Rb1 B1) 11...dc4 12.Bc4 (12.Nc4 Rc8 13.Qe2 Qd7 14.Rd1 Rfd8 15.Bb2= ) 12...Rc8 13.Qe2 Nd5 14.Bb2 Na5 15.Bd3=; B2) 11...Rb8 12.Qe2 (12.Qa4 dc4 13.Nc4 Qd7 14.Qb5 Rbc8 15.Bb2= ; 12.Qc2 Rc8 13.c5 Na5 14.Nb3 Nc4 15.Nfd2=) 12...a6 13.cd5 Nd5 14.Bb2 b5 15.Ne4=; B3) 11...Qd7 12.cd5 (12.Qc2 Rac8 13.Rd1 Na5 14.Ne5 Qd8 15.Qa4= ; 12.Rb3 dc4 13.Nc4 Rac8 14.Bb2 Rc7 15.Qe2=) 12...Nd5 13.Qb3 Rac8 14.Nc4 Nf6 15.Bd2=; B4) 11...Qc7 12.Bb2 (12.Qc2 Na5 13.cd5 Qc2 14.Bc2 Rfc8 15.Bd3= ; 12.Qe2 Rfc8 13.e4 de4 14.Ne4 Na5 15.Ned2=) 12...dc4 13.Nc4 a6 14.Nce5 Ne5 15.de5=; C) 11.Bb2 C1) 11...dc4 12.Nc4 (12.Bc4 Rc8 13.Qe2 Rc7 14.e4 Qd7 15.Bc3= ) 12...a6 13.Qb1 Rc8 14.e4 h6 15.Rc1=; C2) 11...a6 12.cd5 (12.Qb1 dc4 13.Nc4 b5 14.Nce5 Rc8 15.Rd1= ; 12.Qe2 dc4 13.Nc4 b5 14.Nce5 Ne5 15.de5= ) 12...Nd5 13.Rc1 f5 14.Qe2 Qd7 15.Nc4=; C3) 11...Rb8 12.Qe2 (12.Qb1 Rc8 13.Rc1 dc4 14.Nc4 Qd5 15.e4= ; 12.cd5 Nd5 13.Rc1 Rc8 14.Qb3 a6 15.Rc2=) 12...dc4 13.Nc4 b5 14.Nce5 a6 15.Rfd1=; C4) 11...Rc8 12.cd5 (12.Qe2 dc4 13.Nc4 Qd5 14.Rac1 Ne4 15.Rfd1=; 12.Rc1 dc4 13.Nc4 b5 14.Ncd2 a6 15.Nb3= ) 12...Nd5 13.Rc1 Rc7 14.Qa4 Qa8 15.Rc2=; D) 11.cd5 D1) 11...Nd5 12.Qb3 (12.Bb2 f5 13.Rc1 a6 14.Qe2 Qd7 15.Nc4= ; 12.Nc4 b5 13.Nce5 Ne5 14.Ne5 a6 15.Bb2=) 12...Rc8 13.Nc4 f5 14.Rb1 Rc7 15.Bd2=; D2) 11...Qd5 12.e4 (12.Bb2 Rfd8 13.e4 Qh5 14.Rc1 Rac8 15.Qe2= ; 12.Rb1 Rac8 13.e4 Qd8 14.Nb3 Qd7 15.Qe2= ) 12...Qh5 13.Rb1 Rfd8 14.Rb5 Qg6 15.Rg5=.

10.c4 Qc7 A) 11.Ra2 A1) 11...Rc8 12.Rc2 (12.cd5 Nd5 13.Qb3 Qd8 14.Rc2 Nd7 15.e4= ; 12.Qe2 dc4 13.Bc4 Bd5 14.Rc2 Bc4 15.Rc4=) 12...dc4 13.Nc4 Nc6 14.Qe2 Qd7 15.Bb2=; A2) 11...dc4 12.Bc4 (12.Nc4 Nc6 13.Rc2 Rac8 14.Qe2 b5 15.Nb2= ) 12...Nc6 13.Rc2 Rac8 14.Qe2 Bd6 15.Bd3=; A3) 11...Rd8 12.cd5 Nd5 13.Rc2 Nc6 14.Ne5 Bd6 15.Ndf3+=; A4) 11...Nc6 12.Rc2 (12.Qe2 dc4 13.Nc4 b5 14.Nce5 Ne5 15.Ne5= ; 12.cd5 Nd5 13.Rc2 Rac8 14.Ne5 Qd8 15.Nc6=) 12...Rac8 13.cd5 Nd5 14.Ne5 Qd8 15.Nc6=; B) 11.Qe2 B1) 11...dc4 12.Nc4 (12.Bc4 Rc8 13.Bb2 a6 14.Rfc1 Nc6 15.Bd3= ) 12...Be4 13.Be4 Ne4 14.Bb2 Nc6 15.Rac1=; B2) 11...Nc6 12.Bb2 (12.cd5 Nd5 13.Bb2 Rfc8 14.Rfc1 Qd8 15.Bc4=; 12.Rb1 Rac8 13.Bb2 dc4 14.Nc4 b5 15.Nce5= ) 12...dc4 13.Nc4 Rfc8 14.Rfc1 Qd8 15.e4= ; B3) 11...Rd8 12.cd5 (12.Ra2 Nc6 13.Rc2 Rac8 14.cd5 Nd5 15.Bb2= ; 12.Bb2 Nc6 13.Rfc1 Rac8 14.Rab1 dc4 15.Nc4= ) 12...Nd5 13.Bb2 Nc6 14.Rfc1 Qd7 15.Rc2+=; B4) 11...Rc8 12.Bb2 (12.cd5 Nd5 13.Bb2 Nc6 14.Rfc1 Qd8 15.Bc4= ; 12.Rb1 dc4 13.Nc4 Be4 14.Nce5 Nc6 15.Bb2=) 12...dc4 13.Nc4 Nc6 14.Rfc1 Qd8 15.e4=; C) 11.Bb2 C1) 11...Rc8 12.cd5 (12.Rc1 dc4 13.Rc4 Nc6 14.Qb3 Qd6 15.Rfc1= ; 12.Qe2 dc4 13.Nc4 Nc6 14.Rac1 Qd8 15.e4=) 12...Nd5 13.Rc1 Nc6 14.Ne5 Qd8 15.Bh7+/–; C2) 11...Nc6 12.Rc1 (12.Qe2 dc4 13.Nc4 Rac8 14.Rac1 Rfd8 15.Rc2=; 12.cd5 Nd5 13.Qb1 f5 14.Rc1 Rac8 15.e4= ) 12...Rac8 13.Qe2 Qd7 14.c5 Qc7 15.cb6+=; C3) 11...Rd8 12.cd5 (12.Rc1 dc4 13.Rc4 Qd6 14.Rc2 Nbd7 15.Qe2+= ; 12.Rb1 Nc6 13.cd5 Nd5 14.Qc2 f5 15.Rfc1=) 12...Nd5 13.Rc1 Nc6 14.Ne5 Bd6 15.Nc6+=; C4) 11...dc4 12.Nc4 (12.Bc4 a6 13.Bd3 Nc6 14.Rc1 Rfc8 15.Ne4= ) 12...Rc8 13.Nce5 Nc6 14.Rc1 Qd6 15.e4+=.

10.c4 Nbd7 A) 11.a4 A1) 11...dc4 12.Nc4 (12.Bc4 Rc8 13.Ba3 Rc7 14.Qb3 Ba3 15.Ra3= ) 12...Rc8 13.Ba3 Bd5 14.Qe2 Ne4 15.Rfc1= ; A2) 11...a6 12.Ba3 (12.cd5 Nd5 13.Ba3 Rc8 14.Qb1 Ba3 15.Ra3= ; 12.Qe2 dc4 13.Bc4 Ne8 14.e4 Nef6 15.Ba3= ) 12...dc4 13.Be7 Qe7 14.Nc4 Rfb8 15.Rb1=; A3) 11...Rb8 12.Qe2 (12.Ba3 Ba3 13.Ra3 Qe7 14.Rb3 Rfc8 15.Qe2= ; 12.Re1 dc4 13.Nc4 Rc8 14.Ba3 Ba3 15.Ra3=) 12...Rc8 13.Ba3 Ba3 14.Ra3 Qe7 15.Rc3=; A4) 11...Rc8 12.Ba3 (12.Qe2 dc4 13.Nc4 Be4 14.Ba3 Nc5 15.Be4= ; 12.cd5 Nd5 13.Ba3 Ba3 14.Ra3 N7f6 15.Qb3=) 12...dc4 13.Nc4 Ba3 14.Ra3 Qe7 15.Ra1=; B) 11.Bb2 B1) 11...Rc8 12.cd5 (12.Rc1 dc4 13.Bc4 a6 14.a4 Nb8 15.Re1= ; 12.Qe2 dc4 13.Bc4 Ne4 14.Ne4 Be4 15.Rac1=) 12...Nd5 13.Qb3 Bc6 14.Rfc1 Rc7 15.Rc2+=; B2) 11...dc4 12.Nc4 (12.Bc4 a6 13.Qe2 b5 14.Bb3 Rc8 15.a4= ) 12...Rc8 13.Qe2 Be4 14.Be4 Ne4 15.Rac1= ; B3) 11...Re8 12.cd5 (12.Rc1 dc4 13.Nc4 a6 14.Nce5 Ne5 15.Ne5= ; 12.Qe2 dc4 13.Nc4 Rc8 14.Rac1 Be4 15.Ncd2=) 12...Nd5 13.Rc1 a6 14.Qb3 b5 15.Rc2=; B4) 11...a6 12.Qe2 (12.Rc1 dc4 13.Rc4 b5 14.Rc2 Qa5 15.Qa1= ; 12.cd5 Nd5 13.Qb1 f5 14.Rc1 Rc8 15.Rc8= ) 12...dc4 13.Nc4 Be4 14.Be4 Ne4 15.Rac1=; C) 11.Qe2 C1) 11...Rc8 12.cd5 (12.Bb2 dc4 13.Nc4 Be4 14.Be4 Ne4 15.Rac1= ; 12.Rd1 dc4 13.Bc4 Ne4 14.Bb2 Nd2 15.Nd2=) 12...Nd5 13.Bb2 Bc6 14.Rac1 b5 15.Rfd1=; C2) 11...a6 12.a4 (12.cd5 Nd5 13.Bb2 N7f6 14.Rfc1 Nd7 15.Rc2+= ; 12.Bb2 dc4 13.Nc4 Be4 14.Be4 Ne4 15.Nfe5=) 12...dc4 13.Bc4 Ne8 14.e4 Qc7 15.Ra2+=; C3) 11...dc4 12.Bc4 (12.Nc4 Rc8 13.Bd2 Bf3 14.Qf3 Nc5 15.Bc2= ) 12...Rc8 13.Bd3 Bd6 14.e4 Nh5 15.g3=; D) 11.Ra2 D1) 11...Rc8 12.cd5 (12.Rc2 dc4 13.Rc4 Rc4 14.Nc4 b5 15.Ncd2= ) 12...Nd5 13.Rc2 a6 14.Rc8 Qc8 15.Bb2=; D2) 11...a6 12.Rc2 (12.cd5 Nd5 13.Rc2 b5 14.Nb1 Bd6 15.Qe2= ; 12.a4 dc4 13.Nc4 b5 14.Nce5 b4 15.Rc2= ) 12...dc4 13.Rc4 b5 14.Rc2 Qa5 15.e4=; D3) 11...dc4 12.Nc4 (12.Bc4 Rc8 13.Rc2 a6 14.Bd3 Nc5 15.Be2+= ) 12...b5 13.Ncd2 a6 14.Rc2 Qa5 15.e4=; E) 11.cd5 Nd5 12.Bb2 (12.Qb3 Rc8 13.Bb2 Bc6 14.Rfc1 Rc7 15.Rc2+= ; 12.Qe1 Rc8 13.Bb2 f5 14.Qe2 Nc3 15.Bc3=) 12...Rc8 13.Qb3 Bc6 14.Rfc1 Rc7 15.Rc2+=.

10.c4 Ne4 11.Bb2 Nd7 (11...Nd2 12.Nd2 (12.Qd2 dc4 13.Bc4 Bf3 14.gf3 Qd6 15.Rac1=) 12...dc4 13.Nc4 Nd7 14.Rc1 Rc8 15.Qe2=; 11...Bd6 12.cd5 (12.Rc1 Qe7 13.Qc2 f5 14.Qb3 Nc6 15.Qa4=; 12.Qc2 f5 13.Rfc1 Nd7 14.Qb3 f4 15.Ne4=) 12...ed5 13.Rc1 Nd7 14.Qa4 a6 15.Bc3=; 11...Nf6 12.cd5 (12.Rc1 dc4 13.Nc4 Nc6 14.Nce5 Ne5 15.Ne5=; 12.Qe2 dc4 13.Nc4 Be4 14.Nce5 Bd3 15.Qd3+=) 12...Nd5 13.Qc2 f5 14.Ne5 Bd6 15.Ndc4+=) 12.cd5 ed5 13.Ne5 (13.Qb1 f5= 14.Qa2 Ndf6 15.Rfc1=; 13.Rc1 Re8 14.Qb3 Bd6 15.Rc2=) 13...Nd2 (13...Rc8 14.Ndf3= (14.Qh5 Ndf6 15.Qe2=) 14...Ne5 15.Ne5=) 14.Qd2+= f6 (14...Ne5 15.de5+=) 15.Nf3 g6 (15...Bd6 16.Bc3+=) 16.Qe2 (16.Rfc1 Re8+/–) 16...a6 (16...Bd6 17.a4+=) 17.Nd2 (17.Bc3 b5+=) 17...Bd6 18.g4 (18.Qf3 Qe7+=) 18...Qe7 19.f4 (19.Rfc1 Rfe8=) 19...Rfe8 20.Rf3 b5 21.a4 (21.f5 Kg7+=) 21...b4 (21...ba4 22.Ra4 Nb6 23.Ra2=) 22.a5 (22.f5 g5=) 22...Nf8 23.h4 (23.f5 gf5 24.Bf5 Ne6=) 23...Ne6+= 24.Qf2 Ng7 25.Kg2 (25.h5 gh5 26.gh5 Bc8+= (worse is 26...Nh5 27.Qh4 Qf7 28.Rh3+=)) 25...Bc8 (25...f5 26.gf5 Nf5 27.Bf5 gf5 28.Nb3–/+) 26.Rg3 Kf7 (26...Rb8 27.Rc1+=) 27.Rh1 (27.Qf3 f5=) 27...f5 28.g5 (28.h5 fg4 29.hg6 hg6+=) 28...Nh5 (28...Kg8 29.Qf3+=) 29.Rgh3 (29.Rf3 Kg8+=) 29...Qc7 (29...Bb7 30.Rc1+=) 30.Be2 (30.Nb3 Qc6=) 30...Qc2 (30...Qa5 31.Ra1 Qc7 32.Bh5 gh5 33.Qf3–/+) 31.Bh5+= gh5 32.Nf3 Qf2 33.Kf2 Bd7 34.Rc1 Rac8 35.Rhh1 Rc4 (35...Bb5 36.Ne5 Ke6 37.Rhg1+=) 36.Nd2 (36.Ne5 Be5 37.fe5 Rb8=) 36...Rec8 (36...Rc1 37.Rc1 h6 38.gh6+=) 37.Nc4= dc4 38.Ba1 c3 39.Rb1 (39.Rhd1!?+=) 39...Bc6 40.Rhc1 (40.Rhg1 c2 41.Rbc1 b3–/+) 40...Be4 41.Rb3 Bd5 42.Rbb1 Ba2 43.Ke2 b3 44.Rb3 Bb3 45.Bc3 (45.Rc3 Bc4 46.Kf2–+) 45...Ba3 (45...Ba3 46.Bb2 Rc1 47.Ba3 Rh1–+) 0–1. Skalicka,Carlos – Reca,Damian, Paris ol (men) f–B, 1924. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.d4 Be7)

10.c4 Ne4 11.Qc2 A) 11...Nf6 12.cd5 (12.Ng5 h6 13.Nh7 Nh7 14.Bh7 Kh8 15.Bd3= ; 12.e4 de4 13.Ne4 Nbd7 14.Bf4 Be4 15.Be4=) 12...Qd5 13.e4 Qc6 14.Qb1 Ba6 15.Bb2+=; B) 11...f5 12.cd5 ed5 13.Ne5 Ba6 14.f3 Bd3 15.Qd3+=; C) 11...Nd2 12.Nd2 dc4 13.Nc4 f5 14.Bb2 Nc6 15.Nd2=.

10.c4 Ne4 11.cd5 ed5 (11...Nd2 12.Bd2 Qd5 13.e4 Qd7 14.Be3 Nc6 15.Qb1+=) 12.Qc2 (12.Bb2 Nd7 13.Rc1 Bd6 14.Qa4 a6 15.Bc3=; 12.Qb3 Bd6 13.Bb2 Nd7 14.Rfc1 Ndf6 15.Rc2=) 12...f5 13.Ne5 Ba6 14.f3 Bd3 15.Qd3+=.

6.c4 Nc6 7.d4 Be7 8.Nc3 (8.Bd3 d5 9.cd5 ed5 10.0-0 Re8 11.Qb3=; 8.Be2 d5 9.0-0 dc4 10.Bc4 Qd6 11.a4=; 8.Nbd2 d5 9.cd5 ed5 10.Bd3 Re8 11.0-0=; 8.Qc2 d5 9.Nbd2 a6 10.Rb1 dc4 11.Bc4=) 8...d5 9.cd5 ed5 10.Bd3 Bg4 11.h3 Be6 12.Bd2 a6 13.a4 (13.Ng5 h6 14.Ne6 fe6=) 13...Nb4+= 14.Bb1 Qc8 (14...Rc8 15.0-0+=) 15.0-0= h6 (15...Re8 16.a5=) 16.Qe2 Bd6 17.Rc1 Qb8 (17...Nc6 18.Bd3=) 18.a5+= Rc8 19.Na4 (19.Nh4 Rc4=) 19...Rc1 20.Bc1 Qc7 21.Nc5 (21.Qb2 Ne4=) 21...Bc5 22.dc5 Qc5 23.Bb2 Ne4 24.Ra3 (24.Nd4 Re8+=) 24...Nc6–/+ 25.Nd2 (25.Nd4 Nd4 26.ed4 Qb4 27.Be4 de4–/+) 25...Na5 (25...Qb4 26.Nb3–/+) 26.Ne4 de4 27.Be4 Qb4 28.Bd3 (28.Bc2 Bc4 29.Qd1 Qb2 30.Ra5 Bb5–/+) 28...Bc4 (28...Nc4 29.Bc4 Bc4 30.Qc2–/+) 29.Bc4 (29.Rc3 Bd3 30.Rd3 Nc4+=) 29...Nc4 30.Qg4?? (better is 30.Ra2–/+) 30...Qb2–+ (30...Qb2 31.Ra4 Qb1 32.Kh2 Nd2–+) 0–1. Buehner – Stark, 1983. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.e3 0-0)

6.c4 d5 7.d4 A) 7...Bd6 8.Nc3 (8.Nbd2 b6 9.Bd3 Ba6 10.Bb2 h6 11.Rc1=; 8.cd5 ed5 9.Bd3 Nc6 10.0-0 Ne4 11.Qb3=) 8...Bd7 9.cd5 ed5 10.Qb3 Nc6 11.Nd5=; B) 7...Be7 8.Nbd2 (8.Nc3 Nc6 9.cd5 ed5 10.Bd3 Bg4 11.0-0=; 8.Bd3 dc4 9.Bc4 b5 10.Bd3 Bb7 11.0-0=; 8.Be2 dc4 9.Bc4 b5 10.Bd3 Bb7 11.0-0=; 8.cd5 ed5 9.Bd3 Nc6 10.0-0 Re8 11.Nbd2=) 8...Nc6 9.cd5 Nd5 10.Bd3 Bd7 11.Qc2=.

6.c4 Be7 7.d4 A) 7...Nc6 8.Be2 (8.Bd3 d5 9.cd5 ed5 10.0-0 Re8 11.Qb3=; 8.Nbd2 d5 9.cd5 ed5 10.Bd3 Re8 11.0-0=; 8.Nc3 d5 9.cd5 ed5 10.Bd3 Bg4 11.h3=; 8.Qc2 d5 9.Nbd2 Bd7 10.Rb1 Na5 11.Ne5=) 8...d5 9.0-0 Rb8 10.Nc3 dc4 11.Bc4=; B) 7...d5 8.cd5 (8.Bd3 dc4 9.Bc4 b5 10.Bd3 Bb7 11.0-0=; 8.Be2 dc4 9.Bc4 b5 10.Bd3 Bb7 11.0-0=; 8.Nc3 Nc6 9.cd5 ed5 10.Bd3 Bg4 11.h3=; 8.Nbd2 Nc6 9.cd5 ed5 10.Bd3 Bd6 11.0-0=) 8...ed5 9.Bd3 Nc6 10.0-0 Ne4 11.Qb3=.

6.d4 d5?? 7.dc5+- Qa5 8.Nbd2 Qc5 9.Bd3 (9.Bb2 Qe7+-) 9...Nc6 (9...e5 10.Be2+- (10.Ne5?! Qc3 11.Ra2 Qe5+/-)) 10.0-0 (10.Bb2 Qe7+-) 10...e5 11.Nb3 Qb6 12.Be2 a5 13.Bd2 (13.Rb1 a4 14.Nbd2 Qc7+-) 13...a4 14.Nc1 Qc5 (14...e4 15.Ne1+-) 15.Na2 Bf5 16.Nb4 Nb4? (better 16...Rfe8+-) 17.Bb4 (17.ab4?! Qc2 18.Ne5 Rfc8+-) 17...Qc7 18.Bf8 Rf8 19.Rc1 Re8 (19...Qc3 20.Rb1+-) 20.c4 dc4 (20...Qa5 21.cd5 Nd5 22.Qe1+-) 21.Bc4 (21.Rc4 Qb8+-) 21...Qe7 (21...Qd7 22.Be2+-) 22.Qa4 h6 (22...Bg4 23.Qa7 Ne4 24.Bd5 Bf3 25.Qb7 Qb7 26.Bb7+-) 23.Rfd1 Kh7 24.h3 Ne4 (24...Be4 25.Nd2 Bc6 26.Qb4+-) 25.Bd3 (25.Bd3 Nd6 26.Bf5 Nf5 27.Rd5+-) 1-0. black_bishop_88 (2485) - TheBestRus (2380), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Bc5 4.e3 Nf6 5.Nf3 0-0)

6.Be2 b6 7.0-0 Bb7 8.d4 Be7 9.a4 Nc6 10.Bd2 d5 11.c4 dc4 12.Bc4 Qc7 13.Qe2 Rfc8 14.Rc1 h6 15.Nc3? (15.Na3 Ne4=) 15...Qd7?? (better 15...Nd4 16.Nd4 Qc4-+) 16.Nb5 Nd5 17.e4 Nf6 18.d5 ed5 19.ed5 Nd5 20.Rd1 (20.Bd5 Qd5 21.Rc6 Bc6 22.Qe7 Bb5 23.ab5 Qb5=+) 20...Qe6 (20...a6 21.Nc3 Ncb4 22.Nd5 Nd5 23.Be3-/+) 21.Qe6 (21.Qd3!? Rd8 22.Re1=) 21...fe6=+ 22.Be1 (22.Re1 Na5 23.Ba2 Nc4=+) 22...Kf7 (22...a6 23.Nc3 Ncb4 24.Nd5 Nd5 25.Bb3-/+) 23.Nbd4 (23.Rac1!?=+) 23...Nd4-/+ 24.Bd5 (better 24.Ne5!? Kg8 25.Rd4-+) 24...Nf3-+ 25.Bf3 Bf3 26.gf3 Rc4 27.a5 b5 28.a6 Rac8 (28...Ke8 29.Bd2-+) 29.Rd7 R8c7 30.Rad1 Ke8 31.Rc7 Rc7 32.Rb1 Rc5 33.Bb4 (33.Bd2 g5-+) 33...Rd5 34.Bc3 (34.Be7 Ke7 35.f4 Kd6-+) 34...g6 (34...b4 35.Be1-+) 35.Kf1 b4! 36.Be1 (36.Bb4 Rb5 Decoy) 36...Rb5 37.Ke2 Rb6 38.Kd3 (38.Rb2 Kd7-+) 38...Ra6 39.Kc4 Rb6 (39...g5 40.Bd2-+) 40.Bd2 a5 41.Be3 Rb7 42.Kd4 (42.Bh6 a4 43.Bf4-+) 42...a4 Black intends b3 43.Ke5 (43.Kc4 b3 44.Bh6 b2-+) 43...b3 44.Bd4 a3 Black prepares b2 45.Ke6 b2 46.Rd1 (46.Bb2 Rb2 47.Rc1 a2-+) 46...a2 47.Bb2 Rb2 48.Ra1 Rb6 49.Kd5 Ra6 50.Kc4 Bf6 51.Ra2 (51.Re1 Kd7 52.Kc5 a1Q 53.Ra1 Ra1-+) 51...Ra2 52.Kd3 (52.Kd5 Rf2 53.Ke4 Rh2-+) 52...Rf2 53.Ke4 Rh2 54.f4 Rh3 55.f5 Rh2 (55...g5!? 56.Kd5 Re3 57.Kc5-+) 56.Kf4 (56.fg6 h5 57.Kf3 h4-+) 56...g5 57.Kg4 Kf8 58.Kg3 Kg7 (better 58...Be5 59.Kf3-+) 59.Kg4 (59.Kh2 g4 60.Kg2-+) 59...Rh5! 60.Kg3 (60.Kh5 Be5 Combination) 1-0. black_bishop_88 (2555) - Challenger_Spy (2375), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Bc5 4.e3 Nf6 5.Nf3 0-0)

6.Be2 d5 7.0-0 Nc6 8.d4 Bd6 9.c4 (9.Nbd2 Ne4=) 9...dc4+= 10.Bc4 Qc7 11.Nbd2 Ng4 (11...e5 12.Qc2=) 12.h3 Na5 (12...Nf6 13.e4 e5 14.d5=) 13.Be2+= Nh2 14.Re1 (14.Nh2 Bh2 15.Kh1 Bd6+=) 14...Bd7 (14...Nf3 15.Bf3 Bd7 16.Ne4=) 15.Ng5+= f5 16.d5 (16.Bb2 h6 17.Ngf3 Nf3 18.Bf3 Rac8=) 16...ed5 17.Nb3 Nb3 18.Qd5 Kh8 19.Qb3 Be5 20.Rb1 (20.Ra2 Rac8 21.Bb2 Bb2 22.Rb2+– (22.Qb2?! h6 23.Nf3 Nf3 24.Bf3 Bc6=)) 20...Bc8 (better is 20...Bc6+/–) 21.Bc4+– h6 (21...Rb8+–) 22.Nf7 Kh7 (22...Rf7 23.Bf7 Bf6 24.Rd1+–) 23.Ne5 Qe5 24.Bb2 Qd6 25.Rbd1 Qc7 26.Qc3 Kh8 (26...Nf3 27.gf3 Qe7+–) 27.Rd6!! Rf6 (27...Qd6) 28.Rf6 Kh7 29.Bg8! Kg8 30.Qc7 gf6 31.Qd8 Kf7 32.Kh2 a5 33.Bf6 Rb8 34.Qe7 Kg6 35.Qg7 Kh5 36.Qf7# 1–0. Green Light Chess – New Rival, 2000.

7.Nbd2 b6 8.Bd3 d5 9.c4 Ba6 10.Bb2 Nc6 11.0-0 Na5 12.Ne5 Rc8 (12...dc4 A) 13.Nec4 Nc4 (13...Rc8 14.Rc1 Nc4 15.Nc4 Bb7 16.f3 a6 17.a4=) 14.Nc4 Bb7 15.Rc1 Rc8 16.Qe2 b5 17.Ne5=; B) 13.Ndc4 Nc4 (13...Bc4 14.Nc4 Nc4 15.Bc4 Rc8 16.Rc1 Qd7 17.Qd3+=) 14.Nc4 Bb7 15.Rc1 Rc8 16.Qe2 b5 17.Ne5=; 12...Nc4 A) 13.Nec4 dc4 (13...Bc4 14.Nc4 dc4 15.Bc4 Bd6 16.Qe2 Qc7 17.h3=) 14.Nc4 Bb7 15.Rc1 Rc8 16.f3 b5 17.Ne5=; B) 13.Ndc4 dc4 (13...Bc4 14.Nc4 dc4 15.Bc4 Bd6 16.Rc1 Qe7 17.Qd3=) 14.Nc4 Bb7 15.Rc1 Rc8 16.f3 b5 17.Ne5=; 12...Bc4 A) 13.Nec4 dc4 (13...Nc4 14.Nc4 dc4 15.Bc4 Bd6 16.Rc1 Rc8 17.Qf3+=) 14.Nc4 Nc4 15.Bc4 Rc8 16.Rc1 Qd7 17.Qe2=; B) 13.Ndc4 dc4 (13...Nc4 14.Nc4 dc4 15.Bc4 Bd6 16.Rc1 Qe7 17.Qd3+=) 14.Nc4 Nc4 15.Bc4 Rc8 16.Rc1 Qd7 17.Qe2=) 13.Qe2 (13.Qa4 Bc4 (13...dc4 14.Ndc4 Bc4 15.Bc4 Nc4 16.Nc4 Qd7 17.Qd7=) 14.Ndc4 (14.Bc4 Nc4 15.Ndc4 dc4 16.Nc4 Qd7 17.Qd7=) 14...Nc4 15.Bc4 dc4 16.Nc4 Qd7 17.Qd7=) 13...dc4 (13...Bd6 14.f4 (14.cd5 Bd3 15.Qd3 Be5 16.de5 Qd5 17.Qb1=) 14...Qe7 15.Rf3 Rfd8 16.Rff1 Ne4 17.c5=; 13...Nc4 14.Nec4 (14.Ndc4 dc4 15.Nc4 Bb7 16.Ne5 Qd5 17.f3=) 14...dc4 15.Nc4 Bb7 16.Ne5 Qd6 17.Rfc1=) 14.Nec4 (14.Bc4? Nc4 15.Nec4 Ne4 16.Ne4 Bc4–+ (16...Rc4?! 17.Qd2+=); 14.Ndc4 Nc4 15.Nc4 Bb7 16.Rfc1 Qd5 17.f3=) 14...Nc4 15.Nc4 (worse is 15.Bc4 Rc4 16.Nc4 Qc7–/+ 17.Rfc1–/+) 15...Rc7 (15...Bd6 16.Rfc1= Qd7 17.Qf3=; 15...Bb7 16.Ne5 Qd5 17.f3=) 16.Rfc1 (16.Rac1 Bd6 17.Nd6+=) 16...Qa8 17.Rc2 Rfc8 18.Rac1 Bb7 19.f3 Nd5 20.g3 (20.Ne5 Rc2 21.Bc2 f6=) 20...Bg5 (20...Nf6 21.e4=) 21.f4 Be7 22.e4 Nf6 23.Nd2 (23.Qe3 Qb8= (worse is 23...Ne4 24.Nb6 Rc2 25.Na8 Rc1 26.Bc1 Ba8 27.Be4 Be4 28.Qe4 Rc1 29.Kg2+/–)) 23...Rc2 24.Rc2 Rc2 25.Bc2 Qc8 26.Bd3 Qf8 (26...Qc6 27.g4+=) 27.Ba6 (27.Nb1 Qa8 28.Nd2 Qd8=) 27...Ba6 28.Qa6 Qa8 29.Qd3 Qc6 30.Kg2 b5 31.Kf3 a5 ½–½. Villegas,Benito – Falcon,Enrique, ARG–ch Buenos Aires, 1938. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.e3 0-0 6.d4 Be7)

7.Bd3 b6 8.0-0 Bb7 9.a4 Nc6 10.c3 d6 11.Nbd2 e5 12.e4 Rc8 13.d5 Nb8 14.c4 Nbd7 15.Nb3 a5 16.Be3 Qc7 17.Rb1 Rb8 18.Qe2 Ba6 Exerts pressure on the backward pawn 19.Rb2 (19.Nh4 Nc5 20.Nc5 bc5+=) 19...Rfc8 20.Rc1 h6 21.Rbc2 (21.Nh4 Nc5 22.Nc5 bc5+=) 21...Nc5= 22.Nc5 bc5 23.Nd2 (23.Rb2 Rb4=) 23...Rb4 24.Nb1 Ra4 25.Nc3 Rb4 26.Nb5 (26.Bd2!?=) 26...Bb5-/+ 27.cb5 Qb6 (27...Ne4!? 28.Bh6 gh6 29.Be4 Qb7=+) 28.Bc4 Nd7? (28...Rb8 29.Bd2 Rb5 30.Bb5 Qb5 31.Qb5 Rb5 32.f3+=) 29.Bd2 (29.Qg4 Qd8 30.Bh6 g5+/-) 29...Ra8 (29...Bg5 30.Bb4 Bc1 31.Ba5 Qa5 32.Rc1=) 30.Bb4 cb4 31.Qe3 (better 31.Rb1!?+/-) 31...Qe3=+ 32.fe3 Bd8 33.Bb3 (33.Kf2 Nc5=+) 33...Bb6 (better 33...Nc5 34.Bc4 Ne4-/+) 34.Rc6?? (better 34.Rc8 Rc8 35.Rc8 Kh7 36.Kf2=) 34...Be3-+ 35.Kf1 Bc1 36.Rc2 (36.Rc1 Nc5 37.Bc4-+) 36...Be3 37.Rc7 (37.Ke2 Bd4 38.Rc7 Nc5-+) 37...Nb6 Black prepares the advance a4 38.Rc6 (38.Bd1 a4 39.Ke2 Bd4-+) 38...Bc5 39.Ke2 (39.Rc7 a4 40.Bd1 a3-+) 39...a4 40.Ba4 (40.Bd1 a3 41.Bb3 a2 42.Ba2 Ra2 43.Kd3 Ra3 44.Kd2 Nc4 45.Ke2 b3 46.Rc5 b2 47.Rc8 Kh7 48.Rc7 b1Q 49.Rc4 Qb2 50.Rc2 Qc2 51.Ke1 Ra1) 40...Ra4 41.Kf3 b3 42.Kg4 b2 43.Rc5 (43.Rd6 Bd6 44.Kf3 b1Q 45.h4 Qe4 46.Kf2 Ra2 47.Kg3 Qg2) 43...dc5 44.Kf5 (44.Kh3 b1Q 45.g3 Qf1 46.Kh4 Re4 47.g4 Qf2 48.Kh5 Qh2) 44...b1Q 45.Ke5 Qd3 (45...Nc8 46.Kf4 Qe4 47.Kg3 Qe3) 46.Kd6 Qe4 (46...Re4 47.Kc6 Qd5 48.Kb6 Re6 49.Kc7 Re7 50.Kb6 Qd6 51.Ka5 Ra7) 47.Kc6 (47.Kc7 Na8 48.Kd8 Qd5 49.Kc8 Qe6 50.Kb7 Qb6 51.Kc8 Qc7) 47...Qd5 48.Kb6 c4 49.Kc7 (49.h4 Qd6 50.Kb7 Rb4 51.Kc8 Rb5 52.g4 Rb8) 49...Rb4 (49...Ra7 50.Kb6 Rb7 51.Ka5 Qb5) 50.b6 (50.h3 Rb5 51.Kc8 Qd6 52.g3 Rb8) 50...Qc5 51.Kd7 Qb6 (51...c3 52.Ke8 Qd6 53.b7 Re4) 52.Kc8 (52.h3 Qb7 53.Kd6 Rb5 54.g3 Rd5) 52...Ra4 (52...Qa7 53.Kd8 Rb8) 53.Kd7 Ra7 54.Kc8 (54.Ke8 Qb8) 54...Rc7 (54...Qc7) 55.Kd8 Qb8 0-1. black_bishop_88 (2540) - Challenger_Spy (2385), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.bc5 Bc5 4.e3 Nf6 5.Nf3 0-0 6.d4 Be7)

7.Bd3 d5 8.0-0 b6 9.Qe2 Nc6 10.Nbd2 Bb7 11.Bb2 Na5 12.Ne5 (12.Bc3 Nc6 13.Rfc1 (13.Rfb1 Qc7 14.e4 de4 15.Ne4 Rac8 16.Bd2=; 13.e4 de4 14.Ne4 Rc8 15.Nf6 Bf6 16.Qe4=; 13.Rfe1 Qc7 14.Bb2 Rfc8 15.c4 dc4 16.Nc4=) 13...Qc7 14.Bb2 Rfc8 15.c4 Qd8 16.Rc2=) 12...Rc8 (12...Bd6 13.Bc3 (13.Rac1 Qe7 14.Nb3 Nc6 15.c4 Ba3 16.c5+=; 13.Rfc1 Qc7 14.f4 Ne4 15.Nb3 Be5 16.Na5=) 13...Nc6 14.Nc6 Bc6 15.Bb4 Rc8 16.c4=; 12...Nc6 13.Rad1 (13.Rab1 Ne5 14.de5 Ne4 15.Rfd1 Nc5 16.Qh5=; 13.Ng4 Bd6 14.c4 Na5 15.Nf6 Qf6 16.cd5=; 13.Ndf3 Rc8 14.Nc6 Bc6 15.Ne5 Bd6 16.Rfc1=) 13...Rc8 14.c4 a6 15.cd5 Qd5 16.e4+=) 13.Qf3 (13.Rfc1 Nc6= 14.Nef3 Bd6 15.c4 Qe7 16.cd5=) 13...Rc7 (13...Nc6 14.Rab1 Qc7 15.Rfc1 Bd6 16.Qg3=) 14.Qh3 g6 (14...Nc6 15.Ng4 h6 16.Nf6 Bf6 17.Rab1=; 14...a6 15.f3 b5 16.Ng4=) 15.f4 (15.Rfd1 a6+= 16.Rab1=; 15.Rac1 Ne4 16.Ne4=) 15...Ne4 (15...Qd6 16.Qf3=) 16.Be4 (16.Rfd1 Nd2 17.Rd2 Qd6=) 16...de4+= 17.c4 (17.Rac1 f6 18.Ng4 Bd5+=) 17...f6–/+ 18.Qe6 Kg7 19.Qh3? (better is 19.Rac1+=) 19...fe5–+ 20.fe5 (20.d5 Nc4 21.Nc4 Rc4–/+) 20...Nc4 21.Nc4 Rc4 22.d5 (22.Rf8 Bf8 (22...Kf8?? 23.Qh7 Rc6 24.Qh8 Kf7 25.Rf1 Ke6 26.d5 Kd7 27.dc6 Kc6 28.Qh7+–; 22...Qf8 23.Rf1 Qc8 24.e6=) 23.Rf1 Bd5–+) 22...Rc2 (22...Qd5 23.e6 Kg8 24.Qh6+–; 22...Bd5?! 23.Rf8 Bf8 24.Qd7 Be7 25.e6 Kh6 26.Rd1–+) 23.Bd4 Bd5 24.e6 (24.Rf8 Qf8 (24...Kf8?! 25.Qh7 Ke8 26.e6 Be6 27.Qg6 Bf7 28.Qe4–+) 25.Rf1 Qd8 26.e6 Kg8–+) 24...Kg8 25.Qh6 Rf1 26.Rf1 Bf8 27.Qf4 Rc7 (27...Be6?! 28.Qe4 Qc8 29.Qe5+=) 28.Rd1? (better is 28.Be5 Re7 29.Bf6–+) 28...Bb3 (28...Ba3?? 29.Qe5 Be6 30.Qh8 Kf7 31.Qd8+–; 28...Be6 29.Qe5 Bf5 30.Qh8 Kf7 31.Qh7 Ke8 32.Qg8–+) 29.Rb1 Bc4 (better is 29...Bc2 30.Rf1 Bd6 31.Be5 Be5 32.Qe5–+) 30.Bf6 (30.Qe5 Bg7 31.Qe4–+) 30...Qd3 31.Rc1 (31.Ra1 Bd6 32.Be5 Be5 33.Qe5 Qe3 34.Kh1 Re7–+) 31...Qd2 (better is 31...Bd6!? 32.Qf2 Be6 33.Qe1–+) 32.Ra1 Bd6 33.Qg5 (33.Be5 Be5 34.Qe5 Qe3 35.Kh1–+) 33...Be6 (33...Be6 34.Bb2 Qb2–+) 0–1. Gershman – Kogan,Artur, Ukraina, 1966.

7.Bd3 d5 8.0-0 b6 9.Qe2 Nc6 10.Nbd2 Bb7 11.Bb2 Rc8 A) 12.Rac1 A1) 12...Qd7 13.c4 (13.Rfd1 Rfd8 14.Ne5 Qe8 15.Bb5 Nd7 16.Nc6=) 13...dc4 14.Nc4 Rfd8 15.Rfe1 Qd5 16.e4=; A2) 12...Re8 13.c4 dc4 14.Nc4 b5 15.Nce5 a6 16.Rfd1=; A3) 12...Bd6 13.c4 Qe7 14.cd5 ed5 15.Nh4 Ba3 16.Nf5=; A4) 12...Qd6 13.Rfd1 (13.Ne5 Qb8 14.c4 Rfd8 15.Ng4 Ng4 16.Qg4=; 13.c4 Na5 14.cd5 Qd5 15.Rc8 Rc8 16.Ra1=; 13.Rfe1 Rfd8 14.c4 Na5 15.cd5 Qd5 16.Rc8=) 13...Qc7 14.c4 dc4 15.Nc4 Nd5 16.Nfe5+=; A5) 12...Na5 13.c4 (13.Ne5 Qd6 14.Rfd1 Ne4 15.Qh5 g6 16.Qh3+=) 13...dc4 14.Nc4 Nc4 15.Bc4 Bd6 16.Ne5=; B) 12.Rfc1 B1) 12...Qd7 13.c4 (13.Rab1 Rc7 14.e4 de4 15.Ne4 Nd5 16.Bb5=) 13...dc4 14.Nc4 Rfd8 15.e4 b5 16.Ncd2=; B2) 12...Bd6 13.c4 Qe7 14.cd5 ed5 15.Nh4 Qc7 16.Ndf3+=; B3) 12...Na5 13.Ne5 Nd7 14.Nd7 Qd7 15.c4 dc4 16.Nc4=; C) 12.Rab1 Qd7 (12...Bd6 13.c4 Qe7 14.e4 Ba3 15.Ba3 Qa3 16.e5=; 12...Rc7 13.Rfe1 Qd6 14.e4 Qf4 15.ed5 ed5 16.Qe3=) 13.Rfe1 Rfd8 14.e4 de4 15.Ne4 Nd5 16.Qd2=; D) 12.c4 D1) 12...Qd7 13.Rfc1 (13.Rac1 dc4 14.Nc4 Rfd8 15.Rfe1 b5 16.Ncd2=; 13.e4 de4 14.Ne4 Qc7 15.Nf6 Bf6 16.Qe4=) 13...dc4 14.Nc4 Rfd8 15.e4 b5 16.Ncd2=; D2) 12...dc4 13.Bc4 (13.Nc4 Qd5 14.Rfc1 Rfd8 15.e4 Qh5 16.Rc2=) 13...Bd6 14.Rfc1 Re8 15.Ne5 Be5 16.de5=; D3) 12...Rc7 13.Rfc1 (13.Rac1 dc4 14.Nc4 b5 15.Nce5 a6 16.Nc6=) 13...dc4 14.Nc4 Qd7 15.Rc2 Rfc8 16.Rac1=.

7.Bd3 d5 8.Nbd2 b6 9.0-0 Bb7 10.c4 Nbd7 11.Bb2 Re8 12.Rc1 a6 13.a4 Rc8 14.Qe2 Nb8 15.Ne5 Qd6 16.Ra1 Ne4 17.Ba3 Qd8 18.cd5 ed5 19.Ne4 de4 20.Bc4 Bd5 21.Rfc1?? (better is 21.Rfd1=) 21...Ba3–+ 22.Ra3 b5! 23.ab5 ab5 24.Nf7 Qe7 (24...Rc4?! 25.Qc4 bc4 26.Nd8 Rd8 27.f3 ef3 28.gf3+=) 25.Ne5 Bc4 (25...Rc4?! 26.Nc4 bc4 27.Rca1+=) 26.Qb2 Be6 27.Rca1 Nc6 28.Nc6 Rc6 29.Ra7 (better is 29.Qb5!? Qd7 30.Qe5–/+) 29...Qg5–+ 30.h4 Qg6 (better is 30...Qd5!?–+) 31.Qb5–/+ Bh3 32.g3? (32.Qg5!? Qg5 33.hg5–/+) 32...Bg4 33.Qd5 Qe6 (better is 33...Kf8–+) 34.Qg5= Qg6 35.Qd5 Kf8 36.Ra8 Rec8 37.Rc8 Rc8 38.Ra7 h6 39.Qa5 Qf5 40.Qa3 Kg8 41.Ra8 Qf3 42.Rc8 Bc8 43.Qa8 Qd1 44.Kg2 Qc2 45.Qb8 Kh7 46.Qf4 (better is 46.h5!? Qc6 47.Qf4–/+) 46...h5–+ 47.d5 (better is 47.Qe5 Bg4 48.Kg1 Qc1 49.Kh2–+) 47...Bg4 48.Kh2 Qd3 (48...Bf3 49.Kh3 Qc1 50.Qf5 Kg8 51.Qe6 Kh8–+) 49.d6? (49.Qe5 Qc4 50.d6–+) 49...Qd5 50.Kg2? (50.Qf8 Bf3–+) 50...Qf5 (better is 50...Bf3 51.Kh2 Kg8–+) 51.Qf5 Bf5 ½–½. Dawidow,Jacek (2340) – Grzelachowski,Piotr, Poland–chT2 Wysowa, 2003. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.e3 0-0 6.d4 Be7)

7.Bd3 d5 8.Nbd2 b6 9.0-0 Bb7 10.c4 Ne4 11.Qc2 f5 12.Bb2 Nd7 13.Rac1 Rc8 14.Qb3 Bd6 15.cd5 Rc1 (worse is 15...ed5 16.Ne4 fe4 17.Be4+/–) 16.Rc1 Nd2 (worse is 16...ed5 17.Ne4 fe4 18.Be4+/–) 17.Nd2 Bd5 18.Bc4 Nf6 19.f3 Qb8 20.h3 Rc8 21.a4 Bh2 22.Kh1 Bd6 23.Rc2 Kf8 24.Qd3 Bb4 25.e4 fe4 26.fe4 Bc4 27.Nc4 Qf4 28.d5? (28.Ne5 Rc2 29.Qc2 Qf1 30.Kh2 Qf4 31.Kg1 Qe3 32.Kh1+/–) 28...Ne4–+ 29.Be5 Nf2 30.Rf2 Qf2 31.de6 Bc5 32.Bd6 Bd6 33.Qd6 Kg8 34.e7 Qf1 35.Kh2 Qc4 36.Qd8 Rd8 37.ed8Q Kf7 38.Qd7 Kg6 39.Qa7 Qf4 40.Kg1 Qc1 ½–½. Weiss,Siegfried – Ossenbrueggen,Lars (2055), Pinneberg–ch op, 1997. (=1.Nf3 Nf6 2.b4 e6 3.a3 c5 4.bc5 Bc5 5.e3 0-0 6.d4 Be7)

4.Bb2 a5+=.

4.Bb2 c5 5.bc5 Bc5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3).

4.Nc3 d4 A) 5.Na2 a5 (5...a6 6.Bb2 c5 7.bc5 Bc5 8.Nc1 Nc6; 5...c5 6.Bb2 Qb6 7.e3 Nc6 8.Rb1 de3) 6.Bb2 ab4 7.Nb4 c5 8.Nd3 Bd6; B) 5.Na4 Bd7 (5...Nc6 6.Bb2 b5 7.Nc5 Bc5 8.bc5 Qd5; 5...a5 6.b5 c6 7.c4 cb5 8.cb5 Bd6; 5...a6 6.Bb2 Nc6 7.e3 b5 8.Nc5 Bc5) 6.Nc5 Bc5 7.bc5 Bc6 8.e3 de3.

4.Nc3 Bd6 5.e3 a5 6.Bb2 Nc6 (6...ab4 7.ab4 Ra1 8.Qa1+=) 7.Nb5 Be7 8.Nbd4 Nd4 (8...0-0 9.Bd3=) 9.Bd4= 0-0 10.b5 (10.Bd3 Ne4=) 10...Bd6 11.Be2 (11.Qc1 Ne4+=) 11...Qe7 12.a4 (12.0-0 Ba3 13.Ra2 Bc5+=) 12...e5 13.Bb2 c5 14.0-0 (14.bc6 bc6 15.0-0 Bd7+=) 14...e4 15.Ne1 b6 16.c4 (16.f3 Be5 17.Be5 Qe5–/+) 16...Be6 (16...Rd8 17.f3–/+) 17.f3 (17.Qc2 d4 18.d3 Bf5–/+) 17...Qc7 18.cd5 Bh2 19.Kh1 Nd5 (19...Bd5 20.Bf6 gf6 21.Rc1–/+) 20.fe4+= Nb4 21.Nf3 Bg3 22.d4 f6 23.d5 (23.Nd2 Rfe8+=) 23...Bf7 24.Nd2 Rfe8 25.Rc1 (25.Qb3 Rad8+=) 25...Rad8–/+ 26.Qb3 h5 27.Bf3 (27.Rc4 Kh7–/+) 27...f5 (27...Bg6 28.Qc4–/+) 28.Bh5 (28.ef5? Nd5 29.Bd5 Bd5–+ (29...Rd5?! 30.Qc2–+)) 28...Re4 29.Ne4 Bd5 30.Nf6 (30.Rc4 fe4 (30...Be4 31.Rc5 Nd5 32.Rc7 Bc7 33.Bf3+–) 31.Qc3 Rf8 32.Rf8 Kf8 33.Rb4 A) 33...cb4?! 34.Qd4 Qe7 35.Kg1–/+ (35.Qd5?? Qh4 36.Kg1 Qh2 37.Kf1 Qh1 38.Ke2 Qe1); B) 33...ab4–+) 30...gf6 31.Qd1 Be4 32.Qe2 Qg7 33.Rcd1? (better is 33.Kg1 Qg5 34.Rf4–+) 33...Rd1 34.Qd1 (34.Rd1?? Qg5 35.Bf6 Qf6 36.Bf7 Kf7 37.Qh5 Kg7 38.Rd7 Kf8–+) 34...Nd3 35.Qb3 (35.Bf6 Qf6 36.Qg4 fg4 37.Rf6 c4–+) 35...Kh7 (35...Kh7 36.Bf6 Nf2 37.Rf2 Qf6–+) 0–1. Naadir Narcaim – pierre, internet, 2009.

4.Nc3 Bd6 5.e3 a6 6.Be2 h6 7.0-0 e5 8.Bb2 e4 9.Nd4 g6 10.d3+= Bf5? 11.h3 ed3 (11...ed3 12.cd3 Be6+=). Cobra1 – Castletyme, internet, 2008.

4.Nc3 Bd7 5.e3 Bd6 6.d4 Ne4 7.Ne4 de4 8.Nd2 f5 9.Qh5 g6= 10.Qh6 Qe7 11.Be2 Ba4 12.c4 c6 13.Bb2+/– Nd7 14.c5+= Bc7 15.d5 ed5?? 16.Bh8+– 0-0-0 (16...Ne5 17.Bg7+–) 1–0. Ashwad (1815) – perspective08, internet, 2006.

4.Nc3 Be7 5.e3 0-0 6.d4 Nbd7 7.Bd3 c6 8.0-0 Qc7 9.e4 de4 10.Ne4 Ne4 11.Be4 Nf6 12.Bd3 Bd6 13.c4 b6 14.c5 bc5 15.bc5 Be7 16.Rb1 Bd7 17.Ne5 Rab8 18.Rb8 Rb8 19.Bf4 Rd8?? 20.Ng6!+– Qb7 21.Ne7 Kh8 22.Be5 Be8 23.Bf6 gf6 24.Qh5 f5 25.Qg5 (25.Qg5 Qe7 26.Qe7+–) 1–0. gtate (1930) – brunorogani (2215), net–chess.com, 2006.

4.c4 dc4 5.Nc3+=.

4.c4 c6 5.e3 Be7 6.Nc3 Nbd7 7.cd5 cd5 8.Bb2 0-0 9.d4 Re8 10.Bd3 Qc7 11.Rc1 a6?? (better is 11...Qb6+=) 12.Nd5!+– Qd6 (12...ed5 13.Rc7 Discovered attack; 12...Nd5 13.Rc7 Discovered attack) 13.Nc7 (13.Ne7?! Qe7 14.0-0 b5+–) 13...Ra7 (13...Rb8 14.Ne8 Ne8+–) 14.Ne8 Ne8 15.Rc8 Kf8 16.Qa4 b5 (16...Ndf6 17.d5! Bd8 18.Bd4+–) 17.Bb5! Nb6 (17...ab5 18.Qa7 Pinning (18.Qa7 Deflection)) 18.Re8 1–0. The Schemer – pieeater, ChessWorld.net, 2012.

4.c4 Bd6 5.Nc3 dc4 6.e4 e5 (6...a5 7.Qa4 Nfd7 8.e5+=) 7.Bc4= c6 (7...0-0!?=) 8.d4+= ed4 (8...Nbd7 9.0-0+=) 9.Qd4+/– (9.Nd4?! 0-0 10.Nf3 Qe7=) 9...Bg4? (better is 9...0-0+/–) 10.e5+– Bf3 11.gf3 (11.Qd6 Qd6 12.ed6 Bd5 13.Nd5 cd5 14.Bb5 Nc6=) 11...Qe7? (11...Be7 12.Qd8 Bd8 13.ef6 Bf6+–) 12.Qd6 Qd6 13.ed6 Nbd7 14.Ne4 Ne4 15.fe4 Ne5 16.Be2 Kd7 17.f4 Ng6 18.e5 f6 19.Bg4 Kd8 20.e6 a6 21.Be3 1–0. Tiedemann,Joern (2125) – Fischer,Bernd (1860), RSS7E basic–18, 2009.

4.d3 c5 5.c3 Be7 6.bc5 Bc5 7.Bg5 Qb6 (7...Nbd7 8.e3=+) 8.e3 Nbd7 9.Nbd2 h6 10.Bf6 Nf6 11.Be2 0-0 12.0-0 Qc7 13.c4 b6 14.cd5 ed5 15.Nb3 Bb7 (15...Bd6!?=) 16.Nc5+= bc5 17.Rb1 (17.Qc2 Rac8+=) 17...Rac8 (17...Qe7!?=) 18.Qa4 Ba8 19.Rfc1 Rfe8 20.Nd4 Qe5 21.Nb3 d4 22.e4 Qe7 (22...c4!? 23.Rc4 Rc4 24.Qc4 Ne4=) 23.Bf3+/– h5 24.Qb5 Ng4 (24...Nd7!?+/–) 25.Bg4 hg4 26.Nc5 g3 27.fg3 Qg5 28.Qd7 Qe3 29.Kh1 Rcd8 (29...Rf8 30.Qa7 Qg5 31.a4+–) 30.Qa7 Re5 31.Rf1 Rh5 (31...Rc5 32.Qc5 Qd3+–) 32.Qf7 (32...Kh7 33.Qh5 Qh6 34.Qf5 Qg6 35.Qg6 Kg6 36.Rb6 Kh7 37.Ne6+–) 1–0. orane – northman, 2003.

4.d3 Be7 5.c4 (5.Bf4 a5 6.b5 c6=+) 5...dc4 6.Ne5? (6.e4 Nbd7=+) 6...cd3 (better is 6...Qd4!? 7.Nc4 Qa1–+) 7.Qd3–/+ Qd3 (7...Nbd7 8.Bb2–/+) 8.Nd3 0-0 (8...a5 9.b5–/+) 9.Nc3 a6 (9...Nc6 10.Bf4–/+) 10.Bf4 Bd6 (10...a5 11.b5–/+) 11.g3 (11.e4 e5 12.Be5 Be5 13.Ne5 Re8=+) 11...Nc6 (11...a5 12.Bd6 cd6 13.b5=+) 12.Bg2=+ e5 13.Bc6 (13.Bg5 Nd4 14.Rc1 a5–/+) 13...ef4 14.Be4 (14.Bg2 fg3 15.hg3 c6–/+) 14...fg3–/+ 15.hg3 Ne4 (15...Re8 16.Bg2–/+) 16.Ne4 Be7 17.Rc1 (17.Rd1 a5 18.Rh5 ab4 19.ab4 Re8–/+) 17...c6 (17...Bf5 18.Nec5 b6 19.Nb3–/+) 18.Ne5 (18.Rh5 Re8 19.Re5 f6–+) 18...Be6 (better is 18...Re8 19.Nf3 Bb4 20.ab4 Re4–+) 19.Ng5?? (better is 19.Nc5 Bd5 20.Rh5 Bc5 21.bc5–/+) 19...Bg5–+ 20.f4 Bd5 21.Nf3 Bf6 22.Rc2 Rfe8 23.Rh2 Bf3 24.Rf2 Bd5 25.g4 Bb3 26.Rc1 Bh4 27.Rc3 Bf2 28.Kf2 Bd1 29.Re3 Re3 30.Ke3 Re8 31.Kd2 Be2 32.g5 h6 33.gh6 gh6 34.Ke1 Re4 35.f5 f6 36.Kf2 Rf4 37.Ke2 h5 38.Ke3 Rf5 39.Ke4 Rf1 40.Ke3 h4 41.Ke2 Rg1 42.Kf2 Rg7 43.a4 h3 44.b5 h2 45.ba6 ba6 46.a5 h1Q 47.Ke3 Qh4 48.Kf3 Rg3 49.Kf2 Qh2 50.Kf1 Rg1 0–1. bvboucher (2025) – geebs (2325), net–chess.com, 2005.

4.d4 a6 5.Bb2 Bd6 6.Nbd2 b5 7.c3 Nbd7 8.Qc2 Nb6 9.e4 de4 10.Ne4 Ne4 11.Qe4 Nd5 12.Bd3 Bb7 13.Qg4 g6 14.0-0 (14.Ne5+=) 14...Be7?? (14...Nf4 15.Rad1 h5–+ (15...Nd3?! 16.Rd3 h5 17.Qh3+=)) 15.a4+= c6 16.a5 Nf6 17.Qh3 Bf8 18.Bc1 Bg7 19.Bh6 0-0 20.Bg7 Kg7 21.Rfe1 (21.Ne5 Nd5 22.Be4 Qc7+/–) 21...Qd6 (21...Nd5!? 22.Be4 Nc3=) 22.Ne5+/– Rad8 23.g3 Qd5 24.Bf1 (24.f3 Qb3 25.Rac1 Nd5=) 24...Rfe8?? (better is 24...c5 25.Bg2 Qg2 26.Qg2 Bg2 27.Kg2 cb4–+) 25.Bg2+/– Qd6 26.Rad1 Qc7 27.Bf3 Re7 28.Qg2 Nd5 29.Rc1 Ree8 30.Nd3 Re7 31.Nc5 Rde8 32.h4 e5 33.Nb7 (33.de5 Re5 34.Re5 Re5+=) 33...Qb7= 34.de5 Re5 35.Re5 Re5 36.Qh1 (36.Qf1 Qe7=) 36...Qe7 (36...Nc3!? 37.Rc3 Re1 38.Kg2 Rh1 39.Kh1 Qe7 40.Rc6 Qb4 41.Ra6 Qd4–/+) 37.Kg2= h5 38.Kh2 Qe6 ½–½. Walter,Brian – Poniatowski,Donald, Michigan Senior Reserve, 2005. (=1.d4 d5 2.Nf3 Nf6 3.a3 e6 4.b4 a6)

4.d4 a6 5.Bg5 Be7 6.Nbd2 b5 7.e3 Nbd7 8.c3 c6 9.a4 Bb7 10.Bf6 (10.Bd3 0-0+=) 10...Bf6 11.e4 de4 12.Ne4 e5?? (better is 12...Be7+=) 13.Nd6+– (13.Nd6 Kf8 14.Nb7+–) 1–0. Lesiak,Pawel – Jarszyk,Thomas, Koeln CC Christmas op, 1993.

4.d4 Nc6 5.e3 Ne4 6.Nfd2 f5 7.Ne4 fe4 8.Be2 Qg5 9.g3 e5 10.Bh5 g6 11.Be2 Bg7 12.h4 Qf6 13.Bb2 ed4 14.b5 Ne5 15.Bd4 0-0 16.0-0 Qf5 17.Be5 Qe5 18.c3 Bh3 19.Re1 Qf5 20.Rf1 Bf1 21.Qf1 c5 22.a4 d4 23.cd4 cd4 24.Ra2 d3 25.Bd1 Bh6 26.Qe1 Rac8 27.Nc3 Bg7 28.g4 Qe6 29.Ra3 Rfe8 30.Bb3 Rc4 31.Bc4 Qc4 32.Qd2 Qe6 33.Qd1 Rf8 34.Nb1 Rf3 35.Qb3 Qb3 36.Rb3 Rh3 37.Rb4 d2 38.Nd2 Bc3 39.Re4 Bd2 40.g5 Rf3 41.Kg2 Rf7 42.f4 Kf8 43.Kf2 Rc7 44.Ke2 Ba5 45.Rd4 Re7 46.e4 Rc7 47.e5 Ke7 48.Kf3 Ke6 49.Kg4 Rc1 50.Rd6 Ke7 51.Rf6 Rc4 52.h5 Bd2 53.a5 gh5 54.Kh5 Bf4 55.Rh6 Be5 56.Rh7 Kf8 57.Rb7 Bd4 58.g6 Rc5 59.Kg4 Rd5 60.b6 a6 61.Rc7 Be5 62.Rf7 Kg8 63.Ra7 Ra5 64.b7 Rb5 65.Kf3 a5 66.Ke4 Bc7 67.Kd3 Kg7 68.b8Q Rb8 69.Rc7 Kg6 70.Ra7 Rb5 71.Kc4 Rh5 72.Kb3 Kf6 73.Ka4 Ke6 74.Ra5 Ra5 75.Ka5 Kd5 ½–½. capacuba (2320) – snowcert (2425), net–chess.com, 2014. (=1.d4 d5 2.Nf3 Nf6 3.a3 e6 4.b4 Nc6)

4.d4 Bd7 5.e3 Ba4 (5...Bd6 6.Bd3=) 6.Nc3 Nc6?? (better is 6...Bd7=) 7.Na4+– Bd6 8.Bb5 (8.Bd3 0-0+–) 8...a6 (8...0-0 9.0-0+–) 9.Bc6 bc6 10.0-0 (10.c4 dc4 11.Qc2 a5+–) 10...0-0 (10...a5 11.c4!+–) 11.Bb2 (11.c4 a5+–) 11...Qd7 (11...a5 12.Nc5+–) 12.Qd3 h6 13.Ne5 Be5 14.de5 Ne8 15.Nc5 Qc8 16.h3 f6 17.ef6 Nf6 18.Bf6 Rf6 19.e4 de4 20.Qe4 Qf8 21.Ne6 Qf7 22.Nc5 Re8 23.Qd3 Re5 24.Nd7 Rd5 25.Nf6 Qf6 26.Qa6 Rd2 27.Qc8 Kh7 28.c4 Qc3 29.Qf5 Kg8 30.Rfe1 Qc4 31.Re8 1–0. iboyd (1950) – oracleinshadows (1725), net–chess.com, 2006.

4.d4 g6 5.Nbd2 Bg7 6.e3 0-0 7.Bb2 b6 8.c4 dc4 9.Bc4 Bb7 10.0-0 Qe7 11.Qb3 Nbd7 12.Rac1 Rfc8 13.Rc2 c5 14.bc5 Bf3 15.Nf3 (worse is 15.gf3 bc5 16.Rd1 Rab8+=) 15...bc5 16.Rfc1 Rab8 17.Qa4 (better is 17.Qa2!?+=) 17...Nb6+= 18.Qa6 Ne4 (better is 18...cd4 19.Bd4 Rc4 20.Rc4 Nc4 21.Qc4 Qa3+=) 19.Bd3+/– Nf6? (better is 19...f5+/–) 20.dc5+– Nbd5 21.Be5 Nc7 22.Qa7 Ra8 23.Qb7 Rab8 24.Qc6 Nce8 25.Qa4 Ra8 26.Qb4 Nc7 27.a4 Nd7 28.Bd6 Qf6 29.Bb5 Rab8 30.Qc4 Nb5 31.ab5 (31.Bb8?! Na3 32.Qa6 Rb8+–) 31...Nb6 (31...Ra8 32.Qh4+–) 32.Qd4 (32.cb6 Rc4 33.Rc4 Qf5 34.Bb8 Qb5 35.Rc8 Bf8+–) 32...Qd8 33.Qd2 (33.Qd2 Ra8 34.Bg3 Qd2 35.Nd2+– (35.Rd2?! Rc5 36.Rcd1 Rb5=); 33.cb6 Rc2 34.Rc2 Bd4–/+) 1–0. Loper,Bert (1690) – Berry,Frank Kimball (1780), Oklahoma op, 1997. (=1.d4 e6 2.a3 Nf6 3.b4 d5 4.Nf3 g6)

4.e3 b5 5.d3 Nc6 6.Nbd2 Bd6 7.Bb2 0-0 8.c4 dc4 9.dc4 bc4 10.Nc4 Ne4 11.Bd3 f5 12.0-0 e5 13.Rc1 Ba6 14.Nd6 cd6 15.Ba6 f4 16.Rc6 Rf6 17.Qd5 Kf8 18.Rd1 Qd7 19.Ne5 Qe6 20.Ng6 Rg6 21.Bc4 Qg4 22.Qf7 1–0. OnlyPolishOpening (1780) – AidaSA, lichess.org, 2020.

4.e3 b6 5.Bb2 c5 6.bc5 bc5 7.Be2 Bd6 8.0-0 0-0 9.d4 (9.c4 Nc6=) 9...c4+= 10.Nbd2 Nbd7 (10...Qc7 11.Bc1+=) 11.c3 Nb6 12.Qc2 (12.a4 Qe7+=) 12...Bd7 13.e4 Ba4 14.Qb1 Nh5 15.e5 Be7 16.Bd1 Nf4 17.Bc2 Bc2 18.Qc2 f6 (18...Rb8 19.Rfb1+=) 19.Bc1 (19.ef6 Rf6 20.Ne5 Bd6=) 19...Nd3 20.Ne1 (20.ef6 Bf6 21.Ne1 Nc1 22.Qc1 e5 23.de5 Be5+=) 20...Nc1–/+ 21.Qc1 fe5 22.de5 Na4 23.Nef3 Qa5 The isolani on c3 becomes a target 24.Nd4 Nc3 25.Nc6?? (better is 25.Kh1 Rac8 26.Ne6–/+) 25...Ne2–+ 26.Kh1 Nc1 27.Na5 Nd3 28.Nf3 Bc5 29.Ra2 Rab8 30.Nc6 Rb7 (30...Rb6 31.Nb4 Nf2 32.Raf2 Bf2 33.Rf2–+) 31.Nfd4 (31.Kg1 Rc8 32.Nb4 Bb4 33.ab4 c3–+) 31...Bd4 (31...Nf2!? 32.Kg1 Nd3 33.Rf8 Kf8 34.g4–+) 32.Nd4 Nf2! 33.Kg1 (33.Raf2 Rf2 Combination; 33.Rff2 Rb1 Mate attack) 33...Nd3 34.Rf8 Kf8 35.g3 Ke7 36.Re2 Rb1 37.Kg2 a6 38.Kf3 Rb2 (better is 38...Rb3 39.Nb3 cb3 40.Ke3–+) 39.Rb2 Nb2 40.Ke3 Kd7 41.Nc2 (41.Kd2 Nd3 42.Nf3 h5–+) 41...Nd3 42.Kd4 a5 43.Ne3 (43.h3 Kc6–+) 43...Ke7 (43...Ne1 44.Kc3–+) 44.Nd1 (44.Nc2 g5–+) 44...Kf7 (44...Ne1 45.Kc5–+) 45.Nc3 Kg6 (45...Ne1 46.Kc5–+) 46.Nb5 Kf5 (46...Ne1 47.Nc7 Kf7 48.Nb5 Nf3 49.Kc5 Ne5 50.Kb6–+) 47.Nd6 Kg4 48.Nb7 (48.Nb5 Ne1–+) 48...a4 (48...Ne1 49.Na5 Nf3 50.Kc5–+) 49.Nd8 Nc5! 50.Nc6 (50.Kc5 c3 Passed pawn) 50...Ne4 51.Nd8 Ng5 52.Kc3 (52.h4 Nf3 53.Kc3 Kf5–+) 52...Kf5 (52...Kh3 53.g4–+) 53.h4 (53.Nc6 Nf3–+) 53...Nf3 (53...Ne4!? 54.Kb4–+) 54.Kb4 Ke5 55.Ka4 (55.h5 Nd2 56.Nc6 Ke4–+) 55...Nd4 56.Kb4 Nc2 57.Ka4 (57.Kc3 Na3 58.h5 Nb5 59.Kc2 d4–+) 57...Kf5 (57...d4 58.Nc6 Ke4 59.Na5–+) 58.Nf7 (58.h5 e5 59.Nc6 d4–+) 58...h6 59.Nd6 (59.h5 e5 60.Nd6 Kg4–+) 59...Kg4 60.Nb5 Kg3 61.Ka5 (61.h5 Kh4–+) 61...Na3! 62.Na3 (62.Nd4 e5 63.Nf5 Kf3–+) 62...Kh4 63.Kb4 Kg3 64.Kc3 h5 65.Nc2 (65.Kd4 h4 66.Ke5 h3 67.Ke6 h2 68.Kd5 h1Q 69.Kc4 Qe4 70.Kb5 Qd5 71.Kb4 Qd4 72.Kb3 g5–+) 65...h4 66.Ne1 (66.Nd4 h3 67.Ne6 h2–+) 66...h3 67.Kd2 h2 0–1. Sweeney – Olson, Oregon, 1985. (=1.Nf3 d5 2.b4 e6 3.a3 Nf6 4.e3 b6)

4.e3 b6 5.c4 Bb7 6.d4 c5 7.cd5 Nd5 8.Bb5 Bc6 9.Bc6 Nc6 10.Qa4 Qd7 (10...Rc8!?=) 11.dc5+= bc5 12.b5 Nd8 13.Ne5 (13.0-0 a6+=) 13...Nb6= 14.Qb3 (14.Qe4!? Qb5 15.Nc3=) 14...Qd5+= 15.Qd5 Nd5 (15...ed5!? 16.Nc3 Bd6+=) 16.e4+= Nb6 17.Nc3 Bd6 18.Bf4 (18.Nf3 Nc4+=) 18...f6= 19.Nd3 Bf4 20.Nf4 a6 (20...e5 21.Nfd5 Ne6 22.a4=) 21.0-0 0-0 (21...ab5 22.Nb5 Ke7 23.Rfc1=) 22.a4+= a5 (22...g5!? 23.Nh5 Kf7+=) 23.Rfd1+/– e5 24.Nfd5 Nd5 25.Nd5 Ne6 26.Rdc1 Nd4 (26...Rf7 27.b6+/–) 27.Ra2+– (27.Rc5?! Nb3 28.Rac1 Rfd8=) 27...Ne6 28.Rb2 Kf7 29.Kf1 Rfd8 30.Ke2 Rdb8 (30...f5 31.f3+–) 31.Ke3 Rb7 32.Rc4 (32.b6 Ke8+–) 32...Ke8 33.g3 Kd7 (33...Rc8 34.b6+/–) 34.f4 (34.Rd2!? Ke8 35.f4+–) 34...Kd6+/– 35.f5 Nd4 36.g4 (36.Kd3 Rc8+/–) 36...h6 (36...h5!?=) 37.h4+/– Rh8 38.Rb1 (38.h5 Rd8+/–) 38...Rbb8? (38...h5!?+=) 39.Rbc1+/– Rhc8 (39...h5 40.g5 fg5 41.Rc5 gh4 42.Nc7+–) 40.R4c3 Rb7 41.Kf2 Rbb8 (41...h5 A) 42.gh5?! Nf5 43.h6 Nh6+= (43...gh6?? 44.Rf3+–); B) 42.Ne3+/–) 42.Ne3 Ra8 (42...Rc7 43.Nc4 Ke7 44.Ra3+– (44.Na5?! Ra7 45.Nc6 Nc6 46.bc6 Ra4=)) 43.Nc4+– Ke7?? (better is 43...Kc7+–) 44.Nb6 Rab8 (44...g5+–) 45.Nc8 Rc8 46.Rc5 Rc5 (46...Rd8 47.Rc8 Rc8 48.Rc8+–) 47.Rc5 Kd6 48.Rc8 Nb3 (48...Kd7 49.Rg8 Kd6 50.Rg7 Kc5 51.Rc7 Kb6+–) 49.b6 Nc5 50.Rc5! Kc5 (50...Kc5 51.b7 Passed pawn) 51.b7 1–0. Dosaev,Rustam (2145) – Marchenko,Nikolay (1840), 2012.

4.e3 b6 5.d4 Bb7 6.c4 c5 7.cd5 Nd5 8.Ne5 a6= 9.bc5 (9.dc5 bc5 10.e4 Qc7=) 9...bc5 10.Bd3 (10.Bb2 Nc6=) 10...Bd6 (10...cd4 11.0-0=+) 11.0-0 (11.Qb3 Nb6 12.Nc4 Bg2=+) 11...0-0 (11...cd4 12.ed4 Nc6=+) 12.Qh5 (12.Nd2!? cd4 13.ed4=) 12...Nf6 (12...g6!? 13.Qh6 cd4 14.ed4 Nc6–/+) 13.Qh4 cd4 14.ed4 Be5 15.de5 Qd3 16.ef6 Qg6 17.f3 Qf6 18.Qf6 gf6 19.Nc3 Nd7 20.Rb1 Bc6 21.Rb4 Kh8 (21...Rfd8 22.Rg4 Kh8 23.Bh6=+) 22.Rd1 Rg8 23.Kf2 Rgb8 24.Rbd4 Rb7 (24...Ne5 25.Ne4 Be4 26.Re4=+) 25.Rd6 (25.Ne4 Rb1=) 25...Rc8 (25...Ne5 26.Bh6 Rb2 27.R1d2 Rd2 28.Rd2=+) 26.Bh6 f5 (26...Rb2 27.R6d2 Rd2 28.Rd2=+) 27.R1d2 Rcc7 (27...Nf6 28.Ne2=) 28.Ne2 Rb5?? (better 28...Kg8=) 29.Rc2+– 1–0. Pal,Peter (2200) – Horvath,Tamas5 (1680), Zalakaros op, 2004. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 b6)

4.e3 Nc6 5.Bb5 Bd7 6.Bb2 Be7 7.Bc6 Bc6 8.Nc3 0-0 9.0-0 Re8 10.Ne5 a6 11.Nc6 bc6 12.Ne2 Bd6 13.Ng3 Bg3 14.fg3 e5 15.d3 Qd6 16.Qf3 e4 (16...a5 17.ba5 Qe6 18.Bc3=) 17.Qf4 Rac8 (17...Qf4!? 18.Rf4 ed3 19.cd3 Re3 20.Bf6 gf6 21.Rf6 Rd3 22.Rc6 Ra7=) 18.Qg5 Re6 19.Bf6 Rf6 20.Rf6 Qf6 21.Qf6 gf6 22.de4 de4 23.c4 Kg7 24.Rd1 h6 25.g4 Kg6 26.h4 (26.Rd7 a5+/–) 26...f5 27.gf5 Kf5 28.Kf2 f6 29.Kg3 Rg8 30.Kh3 Rg4?? (30...Ke6!?+/–) 31.g3 (better is 31.Rf1 Kg6 32.Kg4+–) 31...Rg7 32.a4 Re7 33.g4 Kg6 34.Kg3 Re5? 35.Rd7 Re6 36.Rc7 f5 37.b5 cb5 38.cb5 ab5 39.ab5 fg4 40.Kg4 h5 41.Kf4 Rf6 42.Ke4 Re6 43.Kf3 Rf6 44.Kg3 Rb6 45.Rc6 Rc6 46.bc6 Kf7 47.c7 (47.c7 Ke8 48.c8Q Ke7 49.Qc5 Ke6 50.e4 Kd7 51.e5 Ke6 52.Qd6 Kf7 53.e6 Kg7 54.Qe7 Kg8 55.Qf7 Kh8 56.Qf8 Kh7 57.e7 Kg6 58.e8Q Kh7 59.Qh5) 1–0. Mr.Oldenslo – pieeater, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.a3 Nf6)

4.e3 Nc6 5.Nc3 Bd6 6.Bb2 b6 7.Nb5 Ne5?? 8.Be5 Be5 9.Ne5 Bb7 10.Bd3 g6 11.Qf3 0-0 12.Nc7! Qc7 13.Qf6 Rad8 14.0-0 a5 15.h3 h5 16.ba5 ba5 17.Rab1 Qe5 18.Qe5 (18.Qe5 Bc8 19.Qc7+–) 1–0. Anonymous – Anonymous, sv.lichess.org, 2011.

4.e3 Nc6 5.d4 Bd6 6.Bb5 Bd7 7.c4 Be7 8.cd5 Nd5 9.e4 Nf6 10.Bd3 0-0 11.Nc3 Re8 12.0-0 a6 13.Qc2 b5? (better is 13...h6+/–) 14.e5+– Nh5 15.Bh7 Kh8 16.g4 (better is 16.Be4 Rf8 17.Ne2+–) 16...Nf6?? (16...g6 17.Bg6 Nb4+–) 17.Ng5 Rf8 18.ef6 Bf6 19.Bg8! Rg8 (19...Rg8 20.Nf7 Mate attack; 19...Kg8 20.Qh7 Mate attack) 20.Qh7 (20.Nf7) 1–0. ICCFmember – pieeater, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.a3 Nf6)

4.g3 a5 5.ba5 Bd6 6.c4 Ra5 7.cd5 ed5 8.Bg2 0-0 9.Bb2 Nc6 10.0-0 Re8 11.e3 Ra6 12.Nc3 Bf5 13.d4 Rb6 14.Qd2 Qd7 15.Rad1 Rb3 16.Qc1 Bg4 17.Rde1 Rb6 18.Nd2 Qe6 19.Na4 Rb5 20.e4 de4 21.Nc3 Ra5 22.d5 Nd5 23.Be4 Ne5 24.Nd5 Rd5 25.Be5 Be5 26.Bd5 Qd5 27.Qc4 Qd7 28.Re3 b5 29.Qc2 c6 30.Rfe1 f6 31.a4 Rd8 32.ab5 cb5 33.Ne4 Rc8 34.Qb1 Rc4 35.Ng5 g6 36.Qa2 Kf8 37.Qb3 Kg7 38.h3 h6 39.hg4 hg5 40.Rd3 Qc6 41.Qd1 b4 42.Rd8 Kh7 43.Qe2 b3 44.Qe3 Qb7 45.Qd3 Rc3? 46.Rd7+– Kh8 47.Qd6!! Qd7 48.Qd7 b2 49.Qd2 Kg7 50.Kg2 Rc7 51.Qb4 Rd7 52.f4 gf4 53.gf4 Bd4 54.Re8 Rf7 55.Qb8 f5 56.Rg8 Kh6 57.Qd8 Bf6 58.g5 Kh5 59.Kg3 b1Q 60.Rh8! Bh8 61.Qh8 Rh7 62.Qh7# 1–0. GLChess207e – Techno150, computer chess game, 2000.

4.g3 c6 5.c3 a5 6.Bb2 Bd6 7.d3 0-0 8.Nbd2 e5 9.Bg2 e4 10.de4 de4 11.Nd4 e3 12.fe3 Ng4 13.Nc4 Nh2 14.Nd6 Qd6 15.Nf5 Qd1 16.Rd1= Bf5 17.Rh2 Nd7 18.Rh5 Be6 19.Ra5 Ra5 20.ba5 Ra8 21.Rd4 Ra5 22.Rb4 Ra7 23.c4 Kf8 24.Kf2 g6 25.a4 Ke7 26.Bc3 Kd6 27.a5 Ra5–+ 28.Rb7 Ra4 29.Bg7 f6 30.Bh6 g5 31.Be4–/+ Bc4 32.Bf5 (32.Bf5 Be6 33.Bh7–/+). gtate (2765) – yourmove (2645), net–chess.com, 2009.

4.g3 Bd6 5.d4 0-0 6.c3 a5 7.Bh3 (7.Bf4!?+=) 7...ab4–/+ 8.Bg5 (8.0-0 Nc6–/+) 8...ba3–+ 9.c4? (better is 9.Qb3–+) 9...dc4 10.Nbd2 (10.Qc1 a2 11.Nbd2 b5–+) 10...b5 11.Bg2 Bb7 12.Nh4 (12.Qb1 Bc6 13.0-0–+) 12...Bg2 13.Ng2 Bb4 14.e3 (14.0-0 Qd4 15.Ra2 c5–+) 14...c3 15.0-0 cd2 16.Bf6 (16.Qc2 Na6–+) 16...Qf6 17.Ra2 Bc3 18.Nf4 b4 19.Ne2 b3! 20.Qb3 Bb2 21.Rd1 Na6 22.Rd2 Rfb8 23.Qd1 (23.Qc4 c5!–+) 23...Nb4 24.Rab2 ab2 25.Rb2 c5! 26.g4 (26.dc5 Qe5 Double attack (26...Qb2 Pinning; 26...Qb2 Deflection; 26...Qe5 Decoy)) 26...Qf3 27.Qb1 (27.Nc3 Qd1 28.Nd1 Ra1–+) 27...cd4 28.Nd4 Qg4 29.Kf1 Qh3 30.Ke2 (30.Kg1 Ra5 31.Kh1 Rd8–+) 30...Qh5 31.Nf3 Qb5 32.Kd2 e5 33.h3 (33.Rb4 Qa5 34.Ng5 h6 35.Qh7 Kf8–+) 33...Qd5 34.Ke2 Qc4 35.Kd2 Rd8 36.Nd4 ed4 37.e4 Qc3 38.Ke2 d3 39.Kf1 d2 40.Rd2 Rd2 41.Kg1 Qf3 42.Qf1 (42.Qe1 Ra1! 43.Qa1 Qf2 44.Kh1 Qg2) 42...Ra1! 43.Qe1 (43.Qa1 Qf2 Mate attack) 43...Qf2 44.Kh1 Qe1 (44...Re1?!=) 0–1. Albacetti,Sergio (2310) – Lambrecht,Roberto (2560), Sinergia_04 (Sinergia), 2000. (=1.Nf3 d5 2.b4 e6 3.a3 Nf6 4.g3 Bd6)

4.g3 Bd6 5.d4 0-0 6.Bg2 a5 7.b5 c6 (7...Ne4 8.Qd3=) 8.bc6 (8.Nc3 Ne4 9.Ne4 de4=) 8...Nc6 (8...b6 9.Nc3=) 9.0-0 (9.Nc3 b6=) 9...b5 10.Nbd2 (10.Re1+=) 10...b4 (10...Qb6!?+=) 11.ab4= Bb4 12.Ba3 (12.Bb2 Ba6=) 12...Ba3 (12...Ba6 13.c4+=) 13.Ra3 Ba6 14.Re1 Ne4 (14...Rc8 15.c3=) 15.e3 (15.c4 Nd2 16.Nd2 Rc8=) 15...Qd6 (15...Qe7 16.Qa1+=) 16.Qa1= Nd2 (16...f5 17.Rc1=) 17.Nd2 Rfb8 18.Rc1 (18.Nb3 Ra7=) 18...Qb4 19.Nb3 Exerts pressure on the isolated pawn. The isolani on a5 becomes a target (19.Rc3 h6=) 19...Be2 20.Nc5 (20.Ra4 Qb6=) 20...Bc4 21.c3 Qb2 (21...Qb5 22.e4=) 22.Bf1 (22.Qb2 Rb2 23.Bf1 Bf1 24.Kf1 Kf8=) 22...Bf1 23.Qb2 Rb2 24.Kf1 Rab8 (24...g6 25.Nd3 Rbb8 26.Kg2+=) 25.c4 (25.Kg2 Ra8+=) 25...Rb1 26.Rac3 Ne7 27.Nd7 R8b7 28.Rb1 Rb1 29.Ke2 (29.Kg2 dc4 30.Rc4 Rb7+=) 29...dc4 (29...Rb7 30.Nc5 Rb2 31.Kf3 dc4 32.Rc4=) 30.Rc4+= Rb2 ½–½. Lamailloux,Michel – Manne,Xavier, FRA AJEC/2406 corr, 1994. (=1.Nf3 d5 2.b4 Nf6 3.g3 e6 4.a3 Bd6)

4.g3 Bd6 5.Bg2 0-0 6.d4 Nbd7 (6...c6 7.0-0+=) 7.c4 (7.0-0 e5+=) 7...dc4 8.Qc2 Nb6 (8...b5 9.0-0–/+) 9.e4 (9.Nbd2 a5 10.ba5 Ra5 11.Nc4 Nc4 12.Qc4 Bd7+=) 9...Be7 10.0-0 c6 (10...a5 11.ba5 Ra5 12.Nbd2+=) 11.Bd2 Qc7 (11...Nfd7 12.Rc1=) 12.a4 Rd8 (12...a5!? 13.ba5 Nbd7+=) 13.Bf4 Ne4?? (better is 13...Qd7 14.a5 Nbd5 15.ed5 Nd5+/–) 14.Bc7+– (14.Qe4?! Qd7+/–) 14...Nf2 (14...Nd6 15.Bd8 Bd8 16.a5+–) 15.Bd8 (15.Bd8 Nh3 16.Bh3 Bd8 17.Rf2+–) 1–0. Jozefini,Lubor (1875) – Velasco,Jose Maria (1890), FICGS, 2013. (=1.Nf3 Nf6 2.b4 d5 3.g3 e6 4.a3 Bd6)

4.g3 Bd7 5.Bb2 c5 6.c3 Bd6 7.d3 0-0 8.Bg2 Bc6 (8...Bc6 9.0-0 Nbd7=+; 8...b5 9.0-0=+) 0–1. geebs (2225) – vectra (2575), net–chess.com, 2005.

4.g3 Nbd7 5.Bb2 h5=.

4.g3 Nbd7 5.Bg2 a5 6.b5 Bd6 7.0-0 0-0 8.Nc3 c5 9.bc6 bc6 10.d4 Ba6 11.Re1 Rb8 12.e4 de4 13.Ng5 c5 14.Nce4 Ne4 15.Ne4+= Nf6 16.Nc5+/– Bc5 17.dc5+– Qc7 18.Bf4 (18.Bf4 Qc5 19.Bd6+–) 1–0. Anonymous – hadjid, internet, 2011.

4.g3 Nbd7 5.Bg2 Bd6 6.0-0 (6.d3 c5+=) 6...0-0 (6...c6 7.c4+=) 7.d3 Prevents intrusion on e4 7...c6 8.c4 a5 Black threatens to win material: a5xb4 9.c5 White threatens to win material: c5xd6 (9.b5 Qc7=) 9...Bc7 (9...Be7 10.Bb2=) 10.Bb2 ab4 11.ab4 Ra1 12.Ba1 b6 Black threatens to win material: b6xc5 13.Qc2 bc5 14.bc5 Ba6 (14...e5 15.e4=) 15.Nd4 White threatens to win material: Nd4xc6 15...Qa8 16.Nd2 Rb8 17.Rc1 Ba5 18.Bc3 Bb4 19.Bb4 Rb4 20.Ra1 (20.Qc3 Rb8=) 20...Qb7 (20...Rd4!? deserves consideration 21.Qc3 Rg4=) 21.Qc3 Rb2?? (better is 21...Nb8+= is just about the only chance) 22.N4b3 (22.N4b3 Rd2 23.Nd2+–) 1–0. Weyrich,Morten (2320) – Hummel,Dirk (2265), Oberliga Nord W (2), 2001. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.g3 Nbd7)

4.g3 g6 5.Bb2= Bg7 6.Bg2 Nbd7 7.d3 0-0 8.Nbd2 c6 9.0-0 c5 10.c3 cb4 11.ab4 b5 12.e3 Bb7 13.Nd4 a6 14.N2f3 e5 15.Nb3 Rc8 16.Rc1 Bh6 17.Ra1 e4 18.Nfd4 Ne5 19.de4 de4= 20.Nc5 Qb6 21.Ra5?? Nc4 22.Ra2=+ Nb2 23.Rb2= a5? 24.Nb7+/– Qb7 25.ba5 Rc3 26.Rb5 Qa6? 27.Qa1 Rd3?? 28.Rb6 Qc4 29.Rf6 Bg7 30.Rc6 Qc6 31.Nc6 Ba1 32.Ra1 f5 33.a6 Kf7 34.Ne5 Kf6 35.Nd3 ed3 36.a7 d2 37.a8Q Ra8 38.Ba8 (< 38.Ra8 d1Q 39.Bf1 g5=+) 1–0. mic (2135) – mrazo (2255), net–chess.com, 2007.

4.h4 a5 5.b5 Bd7 6.Nc3 Bd6 7.e3 c6 8.a4 e5 9.d4 ed4 10.Nd4 c5 11.Ba3? cd4–+ 12.Bd6 dc3 13.f3 Be6 14.Be5 Nbd7 15.Bd6? Qb6 (15...Qb6 16.Bf4 Nh5–+). Izzy5150 – magne, ChessWorld.net, 2005.

5.ba5 d4 (5...Ra5 6.e3 Nbd7 7.d4 Be7 8.Bd3 c5; 5...Bd6 6.Nb5 Be7 7.Bb2 c6 8.Nbd4 c5; 5...Nbd7 6.Bb2 Ra5 7.e3 e5 8.Be2 Be7; 5...Be7 6.e3 Ra5 7.d4 Nbd7 8.Bd3 c5) 6.Na2 Ra5 7.Bb2 e5 8.c3 Be6.

5.b5 d4 6.Na4 c6 7.c4 c5 8.e3 de3.

5.b5 Bd6 6.Bb2 0-0 7.e3 e5 8.d4 (8.Be2 Nbd7+= (8...a4+=)) 8...e4–/+ 9.Ne5 Nbd7 10.Na4 Qe8 11.Nd7 Bd7 12.Rc1? (better is 12.Qe2+=) 12...Bb5–+ 13.Bb5 Qb5 14.c3 (14.c4 dc4 15.Qc2 Rfe8–+) 14...b6 (14...Qc4 15.Nc5–+) 15.Ba1 (15.c4 dc4 16.0-0 Rad8–+) 15...Ba3 16.Rb1 Qa6 17.Rb3 (17.Qb3 Bd6–+) 17...Bd6 18.Rb1 (18.Qe2 Rfb8–+) 18...b5 (18...Qc4 19.Rc1–+) 19.Nb2 (19.Nc5 Qc6–+) 19...a4 20.0-0 (20.Qe2 Rfb8–+) 20...a3 21.f3 (21.Qc2 ab2 22.Bb2 Qa4–+) 21...Qc6 22.Nd3 (22.Qb3 ab2 23.Bb2 ef3 24.gf3 Rfe8–+) 22...ed3 23.Qd3 Ra5 24.Rbe1 Re8 25.Rf2 a2 (25...Qc4 26.Qf5–+) 26.Rb2 Ra3 27.Rb5 Bf4! 28.Rb4 (28.ef4 Re1) 28...Bh2! 29.Kh2 (29.Kf2 Qd6 30.Ke2 Bg3–+) 29...Qd6 30.g3 Qb4!! 31.Qf5 (31.cb4 Rd3) 31...Rc3 (31...Rc3 32.Bc3 Qc3–+) 0–1. pahan – pierre, internet, 2009.

5.b5 Bd6 6.d4 Nbd7 7.e3 0-0 8.Bd3 e5.

5.b5 Bd6 6.g3 0-0 7.Bg2 c6 8.0-0 Nbd7 9.d3 h6 10.Bd2 e5 11.Rb1 Re8 12.bc6 bc6 13.e4 Ba3–/+ 14.Re1 d4 15.Na4 Bd6 16.c3 c5 17.Nh4 Nf8 18.Nf5 Ne6 19.Nb6=+ Ra6 20.Nd6 Qd6 21.Nc4 Qc7 22.f4 ef4–/+ 23.e5 Nd7 24.cd4 Nd4 25.Bf4= Ne6 26.Nd6+= Rd8 27.Nc8 Rc8 28.Bb7 Raa8 29.Qf3 Rab8 30.Bc8 Rc8 31.Rb7+/– Qd8 32.Qe4 Ndf8 33.Be3+/– Ng6 34.Rf1 Nh8 35.Rfb1 1–0. gtate (2305) – gtan (2345), net–chess.com, 2007.

5.b5 Bd6 6.g3 e5 7.d3 c6 8.Rb1 0-0 9.Bg2 Bg4 10.bc6 bc6 11.h3 Bf3 12.Bf3 Qe7 13.0-0 Ba3–+ 14.Bd2 a4 15.e4 d4 16.Ne2 c5 17.g4 Nc6 18.g5 Ne8 19.c3 dc3 20.Nc3 Bb4 21.Nd5 Qd6 22.Be3 a3 23.Qc2 Nc7 24.Nc7 Qc7 25.Qa2 Qd7 26.Kg2 Qd3 27.Rfd1 Qa6 28.Be2 Qa7 29.Bb5 Nd4 30.Bc4 Bc3 31.Bd5 Rab8 32.Rb8 Rb8 33.Qc4 Bb2 34.Rd3 Rb4 35.Qa2 Qc7 36.Bd2 Ra4 37.Be3 c4 38.Bd4 ed4 39.Rf3 d3 40.Rf7 Qf7 41.Bf7 Kf7 42.Kf1 Ke6 43.f4 Kd6 44.Ke1 Kc5 45.f5 Ra8 46.f6 gf6 47.gf6 Rf8 48.e5 Rd8 0–1. gtate (2450) – cnita (2600), net–chess.com, 2007.

5.b5 Nbd7 6.e3 Bd6 7.d4 0-0 8.Bd3 e5.

5.b5 Ne4 6.Bb2 Bd6 7.Ne4 de4 8.Ne5 0-0.

5.bc5 Bc5 6.d4 Bd6 7.Bg5 Qc7 (7...a6=) 8.Nb5 (8.Qd3!?=) 8...Qa5=+ 9.Bd2 Qb5 10.e4 Qb6 11.Rb1 (11.e5!?-/+) 11...Qc7 12.e5 Be5 (12...Ba3!? 13.ef6 gf6-/+) 13.Ne5=+ Nbd7 14.Bb5 0-0 15.f4 Ne5 (15...Ne4!?-/+) 16.fe5= Ne4 17.0-0 Nd2 (17...a6 18.Bd3 Nc3 19.Bc3 Qc3 20.Rf4=+) 18.Qd2= Qe7 19.Rf3 f5 20.Rbf1 a6 21.Bd3 Bd7 22.Qc1 Rac8 23.Qb2 Rc7 24.h3 Ba4 The backward pawn on c2 becomes a target 25.R1f2 Rfc8 26.g4 fg4 27.hg4 Qh4?? (better 27...Bb5 28.c4 Bd7=+) 28.Bh7?? (better 28.Qb4 Qg4 29.Kf1 Qf3 30.Rf3 Bc2 31.Bc2 Rc2 32.Qe7+- (worse 32.Qb7 R8c7 33.Qa6 R2c6+-)) 28...Kh7-+ 29.Qb4 (29.Rh2 Qh2! 30.Kh2 Rc2 31.Qc2 Rc2 32.Kg3-+) 29...g5 (better 29...Rc2 30.Qe1 Qg4 31.Kh1 Rc1-+) 30.Rf8?? (better 30.Rh2 Bc2 31.Rh4 gh4 32.Qe1+/-) 30...Kg7 (better 30...Qg3 31.Rg2 Qe3 32.Rff2 Bc2-+) 31.Rc8= Rc8?? (better 31...Qg3 32.Rg2 Qe3 33.Kh2 Qf4 34.Rg3 Qf2 35.Rg2 Qf4 36.Kh1 Qf1 37.Kh2 Qf4=) 32.Qb7 Kg8 (32...Bd7 33.Qd7 Kh8 34.Qc8 Kg7 35.Qf8 Kh7 36.Rf7 Kg6 37.Qg7) 33.Qc8 Kg7 34.Qf8 (34.Qf8 Kh7 35.Rf7 Kg6 36.Qg7) 1-0. Ozdemir,Metin - Ozsoy,Damla, Turkish Cup, 2020. (=1.Nf3 Nf6 2.Nc3 d5 3.b4 e6 4.a3 c5)

5.Rb1 cb4 (5...d4 6.Na4 cb4 7.ab4 e5 8.Ne5 Qd5; 5...Nc6 6.b5 Nd4 7.e3 Nf3 8.Qf3 e5) 6.ab4 d4 7.Nb5 Nc6 8.c3 e5.

5.bc5 Bc5 6.d4 Bd6 7.Qd3 0-0 8.e4 de4.

5.bc5 Bc5 6.e3 Nc6 7.d4 Bd6 8.Be2 0-0 9.0-0 Bd7 10.Rb1= b6 11.g3 Na5=+ 12.Ne5 Be5 13.de5= Ne8 14.Bb2 Nc4 15.Bc4 dc4 16.Qd4 Qc7 17.Rfd1 Bc8 18.e4 g6 19.a4 Ng7 20.Ba3+– Re8 21.Nb5 Qc6 22.Rb4 Nf5 23.Qc4 Qc4 24.Rc4 Ne7 25.Nc7 (25.Nc7 Bb7 26.Ne8 Re8 27.Rd7+–) 1–0. gtate (2790) – ostefrec (2405), net–chess.com, 2008.

5.bc5 d4 6.Nb5 Bc5 7.c3 dc3 8.d4 Be7.

5.ba5 c5 6.Bd2 (6.e3 Be7=+) 6...Nc6 (6...cd4 7.Nd4 Be7 8.e3–/+) 7.e3=+ c4 (7...cd4 8.ed4 Ne4 9.Bd3=+) 8.Be2 Bd6 (8...Ne4 9.0-0=+) 9.0-0 Bd7 (9...0-0 10.Nc3=+) 10.Nc3 Na5 (10...0-0 11.a4=+) 11.a4 (11.Ne5 0-0=) 11...0-0 12.Rb1 (12.Ne5 Nc6 13.f4 Bb4=) 12...Qc7 13.Nb5 (13.Qe1 Rfc8=+) 13...Bb5–/+ 14.ab5 b6 (14...c3 15.b6 Qc8 16.Be1–/+) 15.Qe1 (15.Bb4 Ne4–/+) 15...Nb7 (15...Ne4 16.Bb4–/+) 16.Ra1 Qd7 (16...Ne4 17.Ra6–/+) 17.Ra8 (better 17.Ne5!? Be5 18.de5=+) 17...Ra8–/+ 18.Qb1 Ne4 19.Be1 f6 20.h3 (20.c3 Na5–/+) 20...Ra3 (20...Be7 21.Nh2–/+) 21.Nh2 (21.Bd2 Be7–/+) 21...Bh2 (21...Na5 22.Ng4–+) 22.Kh2 Nbd6 23.Bb4 Ra7 (23...Ra4 24.Bf3–/+) 24.f3=+ Ng5 25.Bd6 (25.g4!?–/+) 25...Qd6 26.f4 (26.Kh1 Qa3 27.e4 h6–/+ (27...de4?! 28.f4 Nf7 29.Bc4=)) 26…Ra3 ½–½. Da Silva,Celso Luiz – Amorim,Douglas Airton Ferr, BRA TBI–C–XI–XII–P–0038 corr, 1993. (=1.d4 Nf6 2.b4 e6 3.a3 d5 4.Nf3 a5)

5.Bb2 ab4–/+ 6.ab4 (6.c3 c5–/+) 6...Ra1 7.Ba1 Bb4 8.c3 (8.Nbd2 Nc6–/+) 8...Bd6 9.Qa4 (9.e3!? Nc6–/+) 9...Bd7–+ 10.Qa7 (10.Qc2 Nc6–+) 10...b6 11.Na3 (11.Nbd2 Nc6 12.Qa6 0-0–+) 11...0-0 12.e3 (12.Bb2 Nc6 13.Qa4 Na5–+) 12...Nc6 13.Qa4 (13.Qa6 Qa8 14.Nc2 e5 15.de5 Ne5 16.Ne5 Be5–+) 13...Nd4! 14.Qd4 (14.Qd4 Bc5 Double attack (14...Ba3 Deflection; 14...Bc5 Decoy; 14...Ba3 Overloading); 14.cd4 Ba4 Discovered attack; 14.ed4 Ba4 Discovered attack; 14.Nd4 Ba4 Discovered attack) 14...Qa8 15.Nc2 (15.Be2 Qa3 (15...Ba3?! 16.0-0–+) 16.0-0 b5–+) 15...Ba4 16.Nb4 (16.Be2 c5 17.Qd2 Ne4–+) 16...c5 17.Qd3 (17.Qd2 cb4 18.cb4 Rc8–+) 17...cb4 18.c4 (18.Bb2 Rc8 19.Qa6 bc3 20.Bc1–+) 18...dc4 19.Qc4 (19.Qc4 Rc8 20.Bf6 Rc4 21.Bc4–+). Benreguia,Frederic – Mach,Jiri, FICGS, 2008. (=1.Nf3 Nf6 2.d4 d5 3.b4 e6 4.a3 a5)

5.b5 a4 6.e3 (6.c4 dc4 7.Qc2 Nbd7 8.Nbd2 c3 9.Nb1 Bd6 10.Nc3 0-0 11.g3 Nd5 12.Bg2 N7f6) 6...c5 (6...Nbd7 7.Nc3 b6 8.Bd3 Bb7 9.0-0 Bd6 10.Re1 Ne4 11.Bb2 0-0 12.Be4 de4) 7.c4 (7.Bb2 Nbd7 8.c4 Bd6 9.cd5 ed5 10.Nc3 0-0 11.Be2 c4 12.0-0 Nb6) 7...Nbd7 (7...cd4 8.ed4 Be7 9.c5 Ne4 10.Bd2 Nd7 11.Nc3 Bf6 12.c6 Ndc5) 8.Be2 (8.Nc3 cd4 9.ed4 dc4 10.Bc4 Qc7 11.Qd3 Nb6 12.Ba2 Bd6) 8...cd4 9.Qd4 (9.0-0 dc4 10.Qd4 Nb6 11.Qd8 Kd8 12.Ne5 Ke8) 9...Nc5 (9...Bc5 10.Qc3 0-0 11.Bb2 dc4 12.Qc4 b6) 10.Nbd2 Be7 (10...Bd6 11.0-0 0-0 12.Bb2 b6) 11.Bb2 (11.0-0 b6 12.Ne5 Nb3) 11...Rg8 (11...0-0 12.0-0 dc4) 12.cd5 (12.0-0 dc4) 12...ed5 (12...Qd5+=) 13.0-0 Be6 14.Rad1 Nfe4 15.Bc1 Bf6 16.Ne5 Qc7 17.f4 Nd2 18.Bd2 (worse is 18.Rd2 Nb3 19.b6 Qd6–/+) 18...Nb3 19.Qb2 Qb6 20.Bd3 0-0-0 21.Kh1 Kb8 22.Bc2 Nd2 23.Rd2 Qe3 24.Ba4 Be5 25.fe5 Rc8 26.b6 Qc3 27.Bb5 Qa5 (27...d4!?+=) 28.Rd3 Rc5 29.Rb3 Rgc8 30.Bd3 g6 31.Rb1 Rc3 32.a4 Rb3 33.Qb3 Qc3 34.h3 Qb3 35.Rb3 Rc1 36.Kh2 Ra1 37.Bb5 Rc1 38.Rd3 h5 39.h4 Kc8 (39...Re1!?–/+) 40.Kg3 Rc2 41.Kf3 Kd8 42.g3 Ke7 43.Ke3 f6 44.ef6 Kf6 45.Kd4 Rc1 46.a5 Bc8 47.Kd5 Ra1 48.Kd6 Ra5 49.Rd5 Bf5 50.Kc7 Be4 51.Rd6 Ke5 52.Bd3 Rc5 53.Kd7 Bd3 54.Rd3 Rc6 55.Rb3 Kd5 56.Rb5 Kc4 57.Rg5 Rb6 58.Ke7 Rb3 59.Rg6 b5 60.g4 Rh3 61.gh5 Rh4 62.Rc6 Kd3 63.h6 b4 64.Kd7 b3 65.Ke7 b2 66.Rb6 Kc2 67.Rc6 Kd3 68.Rb6 Kc2 69.Rc6 Kb3 70.Rb6 Ka3 (better is 70...Ka2 71.Ra6 Kb1–+) 71.Ra6+= Kb3 72.Rb6 Kc2 (72...Ka2 73.Ra6 Kb1–+) 73.Rc6+= Kd3 74.Rb6 ½–½. Ramos Moreno,Francisco Jose (2110) – Ortega Ruiz,J (2290), XI Open, Malaga ESP, 2008. (=1.Nf3 Nf6 2.a3 d5 3.b4 e6 4.d4 a5)

5.b5 c5 6.dc5 Bc5 7.a4 (7.Bb2 0-0=) 7...0-0 (7...Ne4 8.e3–/+) 8.Bb2 Nbd7 9.e3 b6 10.Nbd2 Bb7 11.Nb3 Bb4 12.c3 Bd6 13.Nfd2 e5 (13...Rc8 14.Rc1–/+) 14.Be2+= Rc8 15.0-0 Qe7 16.Bf3 Rc7 17.Re1 Rfc8 18.e4 de4 19.Ne4 Ne4 20.Be4 Be4 21.Re4 Nf6 22.Re2 e4 23.Nd4 (better is 23.c4+=) 23...Bh2?? (better is 23...Rd7–/+) 24.Kh2+/– Ng4 25.Kh3 Qd7 26.Kg3 f5 27.Qb3 Rc4 28.f4 Kh8 (28...Qf7 29.Rae1+/–) 29.Rh1 Qd6 30.Re4?? (better is 30.Rh5 g6 31.Rh4+/–) 30…fe4–+ 0–1. opportunity (2185) – scheveloper (2190), net–chess.com, 2010. (=1.d4 Nf6 2.b4 e6 3.a3 d5 4.Nf3)

5.b5 c5 6.bc6 Nc6 7.e3 Bd6 8.c4 Black has a new backward pawn: b7 8...0-0 9.Nc3 White should quickly conclude development. 9...Re8 10.Be2 Bf8 (10...dc4 11.Bc4 e5 12.Ng5=) 11.Qb3 (11.0-0 Rb8+=) 11...h6 Prevents intrusion on g5 (11...a4 12.Qb1=) 12.0-0 Bd7 13.Rd1 (13.Qb7?? that pawn is deadly bait and will cause White grave problems 13...Rb8 14.Qa6 Rb6 15.Qb6 Qb6–+) 13...a4 14.Qa2 dc4 15.Bc4 Na5 16.Ne5 (16.Bd3 Nb3 17.Rb1 Qc7=) 16...Nc4 (16...Rc8!? 17.Bd2 Nc4 18.Nc4 Ng4+=) 17.Qc4= Qa5 18.Bd2 Rec8 Black threatens to win material: Rc8xc4 19.Qd3 Be8 20.Rdb1 Qc7 21.Rc1 Qd8 22.h3 Consolidates g4 22...Bd6 23.f4 (23.Nc4 Bf8=) 23...Bc7 24.Rab1 White threatens to win material: Rb1xb7 24...Ba5 (24...b6 25.Rf1=) 25.Nc4 (25.Rb7!? is worth looking at 25...Nd7 26.Rb2=) 25...Bc3 26.Rc3 (26.Qc3?? b5 27.Qd3 bc4 28.Rc4 Rc4 29.Qc4 Rc8–+) 26...b5 27.Ne5 Rc3 28.Bc3 Qd5 29.Bb4 Rc8 30.Qe2 (30.f5!?=) 30...Qe4+= 31.Qd3 Rc2 32.Qe4 Ne4 33.Kh2 (33.Nd3 Nf6+=) 33...f6 Black threatens to win material: f6xe5 34.Nd3 Rf2?? Black loses the upper hand (34...Nd2!? 35.Ra1 Bc6–/+) 35.Re1?? Loses material. forfeits the advantage (better is 35.Nf2 White had this great chance 35...Nf2 36.Kg1+–) 35...Rc2 36.Rc1 Rc1 37.Nc1 A minor pieces endgame occured 37...Nf2 38.Kg3 White threatens to win material: Kg3xf2 38...Nd1 Black threatens to win material: Nd1xe3 39.Kf3 Bc6 40.Ke2 White threatens to win material: Ke2xd1 40...Nb2 41.g4 g5 42.fg5 hg5 White has a new backward pawn: h3 43.Kf2 Kf7 44.Kg3 Nd1 45.Bd2 Nb2 46.Na2 Nc4 Black threatens to win material: Nc4xd2. A beautiful square! 47.Bc1 Kg6 48.h4 gh4 49.Kh4 Nd6 50.Kg3 Ne4 51.Kf4 Nf2 52.Bd2 Nd3 53.Kg3 Nb2 54.Nb4 The knight is not easily driven from b4 54...Bb7 55.Bc1 White threatens to win material: Bc1xb2 55...Nc4 56.Kf4 e5 57.Kg3 Nd6 58.d5 White has a new passed pawn: d5 58...Ne4 59.Kf3 White threatens to win material: Kf3xe4 59...Ng5 60.Ke2 Ne4 61.Kf3 Ng5 62.Kg3 (62.Ke2 Bc8+=) 62...Ne4 Twofold repetition. A sound move (62...Kf7 63.Nc6 Bc6 64.dc6+=) 63.Kh4 (63.Kf3 Ng5=) 63...Bc8 64.Nc6 Bd7 65.Nb8 Bc8 66.Bb2 Kg7 67.Nc6 Kf8 68.Kh5 Kg7 69.Ne7 White threatens to win material: Ne7xc8 (69.Kh4 Bd7+=) 69...Nd6 The knight blocks d5 (69...Bd7 70.Nc6+=) 70.g5 (70.Nc8 Nc8 71.Bc3 Kf7=) 70...Bd7 71.Nc6 An ideal square for the white knight. 71...Be8 72.Kg4 Nc4 73.Bc1 Bd7 74.Kh4 Kg6 (74...Bf5 75.Kh5–/+) 75.gf6 Kf6 76.e4? (better is 76.Nb4+= would keep White alive) 76...Bc6–+ 77.Bg5 Kf7 78.dc6 Ke6 79.c7 Nd6 Black threatens to win material: Nd6xe4 (better is 79...Kd7 Black would have gained the upper hand 80.Be7 Kc7–+) 80.Kg4 (better is 80.Bd2!?+= looks like a viable alternative) 80...Kd7 ½–½. Sebald,Ralph – Kaiser,Michael, Dortmund op–B, 2001. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.d4 a5)

5.b5 c5 6.e3 Be7=.

5.b5 c6 6.e3 cb5 7.Bb5 Bd7 8.Nc3 Bb5 9.Nb5 Be7 10.Ne5 Nc6 11.0-0 Ne5 12.de5 Nd7 13.f4 0-0 14.Nd4 Ra6 15.Rb1 Rb6 16.Nb5 Nc5 17.Bd2 Ne4?? (better is 17...Qd7 18.Qe2 Ra8+=) 18.Ba5+– Bc5 (18...Ba3 19.c4+–) 19.Bb6 Bb6 20.Qd3 Nc5 21.Qc3 (21.Qe2!? Ne4+–) 21...Ne4 22.Qe1 Nc5 (better is 22...Ba5!? 23.c3 f6+–) 23.Nd6 Qc7 24.Nb5 Qc6?? (24...Qd8 25.c4 dc4+–) 25.Nd4 Qc7 26.Rb5 Ne4 27.Qb4 Bd4 28.ed4 Qc4?? (28...Qc2 29.Qb2 Qd3+–) 29.Qc4 dc4 30.Rb7 Ra8 31.Rfb1 (31.Rfb1 f6 32.Rb8 Rb8 33.Rb8 Kf7 34.a4 fe5 35.fe5+–) 1–0. Popp,Tony – Wood,Brian B, CFriend SL–2004–0-00016 email, 2004. (=1.a3 d5 2.d4 e6 3.b4 Nf6 4.Nf3 a5)

5.b5 c6 6.e3 Be7 7.c4 0-0 8.Nc3 c5 (8...Nbd7 9.Bb2=) 9.Bb2 (9.dc5 Bc5 10.Bb2 b6=) 9...b6 (9...Nbd7 10.cd5 ed5 11.Be2=) 10.dc5+= Bc5 11.Na4 (11.cd5 ed5 12.Bd3 Bb7+=) 11...Nbd7= 12.cd5 (12.cd5 Nd5 13.Nc5 Nc5 14.Bd4=) 1–0. uberlebende (2155) – frankvelbrati (1830), gameknot.com, 2014.

5.b5 Nbd7 6.e3 (6.Nc3 Bd6=+) 6...c5 (6...Bd6 7.c4=) 7.Be2 (7.bc6 bc6 8.c4 Ba6=) 7...cd4 (7...Bd6 8.0-0=+) 8.ed4 Bd6 (8...b6 9.0-0=+) 9.0-0 (9.Nbd2 0-0=+) 9...0-0 10.Nbd2 b6 (10...Qe7 11.Bb2=) 11.Re1 Bb7 (11...g6 12.Bd3=+) 12.Bd3 Rc8 (12...Qe7 13.Bb2=+) 13.Bb2 Qc7 (13...Qe7 14.Ne5=+) 14.Rc1= Bf4 (14...g6 15.Ne5=) 15.g3 (15.a4 Rfd8=) 15...Bh6 16.c3 (16.a4 Rfe8=) 16...Ne4 (16...Rfe8 17.a4=) 17.a4 (17.c4!? Qd6 18.cd5 Nd2 19.Nd2 Rc1 20.Bc1 Bd5 21.Ne4 Be4 22.Re4=+) 17...Rfd8 18.Rc2 (18.Be4? de4 19.Ne4 Be4 20.Re4 Qb7–+) 18...f5 19.Nf1 (19.Ba3 Ndf6= (19...Nc3? 20.Qc1+–)) 19...Qd6=+ 20.Ne3 Rc7 21.Qe2 Rdc8 22.Rec1 Qe7 (22...Ndf6 23.Ne5=+) 23.h4 (23.c4 Ndf6=) 23...Qf8 (23...Qd6 24.Be4 de4 25.Ng5=+) 24.Nd2 (24.c4 Qb4 25.Nd2 dc4 26.Ndc4 g6=+) 24...Ndf6 25.Be4 Ne4 (25...fe4 26.c4=+) 26.Ne4 fe4 27.Rf1 g6 28.f3 Rf7 (28...Qd6 29.f4=+) 29.f4 Bg7 (29...Rfc7 30.Kg2=+) 30.h5 Rf6 31.c4 dc4 (31...gh5 32.c5 (worse 32.Qh5 dc4 33.Qe2 Rg6–/+) 32...h4 33.f5=) 32.Rc4 gh5 33.Rc8 (33.Qh5 Rc4 34.Nc4 Rh6–+) 33...Qc8 (33...Bc8 34.Qc2=+) 34.Qh5= Rg6 0–1. Kazimierski,Tomasz – Ethier,Valori (1635), BI–2010–P–00019, 2010. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.d4 a5)

5.Qd3 ab4–/+ 6.a4 c5 7.Qb5 (7.dc5 Na6–/+) 7...Qd7 (7...Bd7 8.Qd3–+) 8.e3 (8.Qd7 Bd7 9.Bf4 c4–+) 8...Qb5 9.Bb5 (9.ab5?? Ra1 10.Nfd2 Ne4–+) 9...Bd7 10.Bb2 Bb5 11.ab5 Ra1 12.Ba1 b6 (12...c4!?–+) 13.dc5–/+ bc5 14.Bf6 gf6 15.0-0 Bd6 16.Nbd2 c4 17.Ra1 0-0 18.b6 Nc6 19.Nd4 (19.b7!? Nd8 20.Ra7–+) 19...Nd4 20.ed4 Rb8 21.Ra6 Kg7 (21...b3 22.Nb3 cb3 23.cb3–+) 22.g3? (22.Nf1 b3 23.cb3 cb3–+) 22...Be7 (22...b3!? 23.c3–+) 23.Ra7 Bd8 24.b7 Bb6 25.Ra4 Rb7 (better is 25...Bd4 26.Nc4 Rb7–+) 26.Rb4–/+ Rb8 27.c3 Ba7 28.Rb8 Bb8 29.f4 e5 30.fe5 fe5 31.Nf3 e4 32.Ne1? (32.Nh4 Bc7 33.Nf5 Kf6–+) 32...Kf6 (better is 32...Bc7–+) 33.Ng2 Kf5 34.Ne3 Ke6 35.Kf2 Bc7 36.h3 f5 37.Ng2 Kd7 38.Ke3? Kc6 39.Kf2 Kb5?? 40.Ne3= Kc6 41.Nf5?? Ba5–+ 42.Ne7 Kd6 43.Nf5 Ke6 44.g4 Bc3 45.Ke3 Bb4 46.Ng7 Kf7 47.Nh5 c3 48.Nf4 c2 49.Ne2 Kg6 50.h4 Be1 51.Nf4 Kf7 52.Ne2 Bh4 53.Kd2 Kg6 54.Nf4 Kg5 55.Nd5 Kg4 56.Kc2 Bf2 57.Kc3? Bd4 58.Kd4+= Kf3 59.Ne3 h5 60.Nf5 Kf4 61.Ne3 h4 62.Ng2 Kg3 63.Nh4 Kh4 ½–½. capacuba (2370) – juditfan (2275), net–chess.com, 2013. (=1.d4 d5 2.Nf3 Nf6 3.b4 e6 4.a3 a5)

5.Nc3 Nbd7 6.e3 c5 7.bc5 bc5 8.dc5 Bc5 9.Bb5 0-0 10.0-0 a6 11.Ba4 Nb6 12.Bb3 Bb7 13.Rb1 a5 14.Na4 Na4 15.Ba4 Ba6 16.Re1 Ne4 17.Bd2 Ba3 18.Nd4 Bb4 19.Bb4 ab4 20.Nc6 Qc8 21.Ne7 Kh8 22.Nc8 Rac8 23.Rb4 Nc3 24.Qa1 1–0. Chess4Win (1740) – BerkanTintas (1700), lichess.org, 2018.

5.e3 Ba6 6.b5 (6.Ba6 Na6 7.c4 Nb8=) 6...Bb7= 7.Nbd2 a6 8.Bb2 ab5 9.Bb5 Bc6 10.Bd3 b5 (10...Bd6 11.Ne5=) 11.Ne5+= b4 (11...Bd7 12.e4+=) 12.ab4 Ra1 13.Qa1 Bb4 14.c3 (14.Nc6?! Nc6 15.Bb5 0-0 16.Bc6 Bd2 17.Kd2 Ne4 18.Ke1 Qg5+–) 14...Bd6 15.Nc6 Nc6 16.Bb5 Kd7 17.Nb3 Qb8? (better is 17...Ng8+–) 18.Qa4 Qb6 19.Na5 Ra8?? (19...Rb8 20.Bc6 Ke7+–) 20.Bc6 Ke7 21.Ba8 Qb2 22.Nc6 Kf8 23.0-0 g6 (23...Qc3 24.Qa6 g6 25.Na7+–) 24.Ne5 (24.c4!? Qe2 25.Ne5 Kg7+–) 24...Kg7 25.c4 dc4 (25...Be5 26.de5 Qe5 27.cd5 Nd5 28.Bd5 Qd5 29.Rc1+–) 26.Qc4 (26.Nc4 Qe2 27.g3 Be7+–) 26...Ne4 (26...Be5 27.de5 Qe5+–) 27.Be4 1–0. Bocchicchio,Marino – Stornelli,Al, ITA–ch Italy, 1994. (=1.Nf3 d5 2.b4 Nf6 3.a3 e6 4.d4 b6)

5.e3 c5 6.bc5 bc5 7.c4 (7.Nbd2 c4=) 7...cd4 8.ed4 Be7 (8...dc4 9.Bc4 Bd6 10.Nc3=) 9.Be2 (9.c5 0-0=) 9...0-0 (9...dc4 10.Bc4 0-0 11.0-0+=) 10.c5 Nc6 (10...Ne4 11.0-0=) 11.0-0 Nd7 (11...Ne4 12.Bf4=) 12.Nbd2 (12.Bf4 e5 13.Bb5 Bb7 14.Bc6 Bc6 15.Be5 Re8+/–) 12...Bf6 (12...e5 13.de5 Nc5 14.Nb3=) 13.Nb3 (13.Qa4 Qc7 14.Bb5 Bb7=) 13...a5 (13...e5 14.Rb1=) 14.a4 (14.Bb5 Qc7=) 14...Qc7= 15.g3 (15.Bg5 Bg5 16.Ng5 Nf6+=) 15...Bb7 (15...e5 16.de5 Nde5 17.Bf4= (17.Qd5? Be6 18.Qd1 Bb3 19.Qb3 Nf3 20.Bf3 Nd4–+)) 16.Bg5 (16.Bf4 e5 17.de5 Nde5 18.Qd5 Qc8 19.Ne5 Ne5–/+) 16...Bg5 (16...Rab8 17.Rc1=) 17.Ng5 h6 18.Nf3 Nb4 19.Bb5 (19.Rb1 Bc6 20.Nc1 e5 21.Ne5 Ne5 22.de5 Qe5+=) 19...Bc6 20.Bc6 (20.Qe2 Rab8=) 20...Nc6+= 21.Re1 Rab8 22.Re3 (22.Nc1 Rb7+=) 22...Rb4 23.Nc1 Rfb8 24.Na2 Rb2 25.Nc3 Na7 (25...Qd8 26.Rb1+=) 26.Rb1= Nf6 (26...R2b4 27.Rc1=) 27.Rb2 (27.Nb5 Rb1 28.Qb1 Qe7=) 27...Rb2 28.Ne1 Nd7 (28...Rb8 29.Nd3=) 29.Nd3 (29.f4 Nf8=) 29...Rb8 30.Qe1 (30.f4 Nf6=) 30...Qb7 31.f4 Kf8 (31...Qb3 32.f5 Nc6 33.fe6 fe6 34.Nf4 Nd4 35.Nb5 Qa4 36.Nd4–/+) 32.g4 (32.f5 ef5 33.Qf2 Nc6 34.Qf5 Nd4+=) 32...Nf6 (32...Qa6 33.f5 ef5 34.Qg3+= (worse is 34.gf5 Qc4+=; worse is 34.Nd5 Qc4 35.Nb6 Qd4 36.Nd7 Qd7–/+)) 33.h3 (33.g5 Ng8+/–) 33...Ng8 (33...Nc6 34.g5 Nh7 35.g6=) 34.Rf3 White intends f5 (34.Ne5 Nf6+=) 34...Ne7 (34...Nc6 35.Nb5+=) 35.f5+= ef5 36.gf5 Qd7? (better is 36...Nec6 37.Rg3 Qe7 38.Qe7 Ne7+=) 37.Ne5+– Qc8 (37...Qd8 38.f6 Nec6 39.fg7 Kg8 40.Nf7 Nd4 41.Nh6 Kh7+–) 38.f6 gf6 39.Ng4 (39.Rf6 Qh3 40.Rf7 Kg8 41.Re7 Rb2+–) 39...f5 (39...Nac6 40.Qh4 Nf5 (40...Nd4 41.Qh6 Ke8 42.Nf6 Kd8 43.Qf8 Kc7 44.Qe7 Kc6 45.Qd6 Kb7 46.Qb6 Ka8 47.Qa5 Kb7 48.Qb4 Ka6 49.Qd4+–) 41.Qf6 Ncd4 42.Qh8 Ke7 43.Nd5 Kd7 44.c6 Nc6 45.Qc8 Rc8 46.Rf5 Rh8+–) 40.Nh6 (40.Nf6 Nac6 A) 41.Nfd5?! Nd5 42.Nd5 Qe6 (42...Nd4?? 43.Qe7 Kg8 44.Rg3 Kh7 45.Qf7 Kh8 46.Qg7) 43.Qe6 fe6+=; B) 41.Qd2+–) 40...Qe6+= 41.Qg3?? (41.Qh4 Rb2=) 41...Rb4 (better is 41...Nac6!? 42.Qh4 Rb4–/+) 42.Qh4+= Nac6 43.Nf5? (better is 43.Nb5–/+) 43...Nf5–+ 44.Qh8 (44.Qg5 Nce7 45.Kh1–+) 44...Ke7 45.Nb5 (45.Kf1 Ncd4 46.Rd3–+) 45...Rb1 46.Kg2 Qe2 (46...Qg6 47.Kf2 Qg1 48.Ke2 Qd1 49.Kf2 Qf1) 47.Rf2 Qe4 48.Rf3 Nh4 (48...Nh4 49.Qh4 Qh4 50.Re3 Kf8 51.Re2 Qg5 52.Kf3 Rb3 53.Nc3 Rc3 54.Re3 Re3 55.Kf2 Qg3 56.Kf1 Re1; 48...Rb2 49.Kg1 Qe1 50.Rf1 Qg3 51.Kh1 Rh2) 0–1. Gomes,Antonio Jose – Luz,J (1905), I Open, Vitoria BRA, 2006. (=1.d4 Nf6 2.Nf3 e6 3.a3 d5 4.b4 b6)

5.Ne5 Bb7 6.Bb2 c5 7.bc5 bc5 8.dc5 Bc5 9.e3 Qb6 10.Bc3 0-0 11.Nf3 Ne4 12.Bd3? (12.Bd4 Nc6+=) 12...a5?? (better is 12...Be3 13.fe3 Qe3 14.Qe2 Qc1 15.Qd1 Qd1 16.Kd1 Nf2 17.Ke2 Nh1–/+) 13.Be4 de4 14.Nd4 e5 15.Nf5 Qf6 16.g4 (16.Qg4=) 16...Ba6?? (better is 16...Rd8 17.Nd2 Bd5–/+) 17.Qd5+= (worse is 17.Ba5 Bc8 18.Bd2 Rd8+=) 17...Qc6 18.Qe5 Nd7 1–0. arvek – Ole P, ChessWorld.net, 2012.

5.Bg5 Nbd7 6.Ne5 Be7?? (6...c5 7.c3=) 7.Nd3 (better is 7.Nc6+–) 7...0-0 8.h3 Ne4 9.Be7 Qe7 10.e3 Ba6 11.Be2 Rac8 12.0-0 c5 13.Qe1? (better is 13.dc5!? bc5 14.Nf4 Be2 15.Ne2+=) 13...cd4–+ 14.Bd1? de3 15.Qe3 Qd6 16.Re1 Bb7 17.Ra2 Ne5 18.Qd4 Rc4?? 19.Qe5+– Qe5 20.Ne5 Rd4? 21.c3 Rc4 22.Nc4 dc4 23.Bc2 Nf6 24.Nd2 b5 25.Nf1 Rd8 26.a4 a6 27.f3 g6 28.ab5 ab5 29.Ra7 Bc6 30.Rc7 Be8 31.Rc5 Ra8 32.Be4 Ra3 33.Re3 h5 34.Bc6 (34.Bc6 Bc6 35.Rc6+–) 1–0. capacuba (2310) – bmurtinho (1925), net–chess.com, 2011. (=1.d4 d5 2.Nf3 Nf6 3.a3 e6 4.b4)

5.Nbd2 a5!? 6.ba5 Qa5+=.

5.Nbd2 g6 6.e3= Bg7 7.c4 0-0 8.Be2 Nbd7 9.0-0 Re8 10.Bb2 Qc7 11.Ne5 Ne5 12.de5 Nd7 13.f4 f6 14.ef6 Nf6 15.h3 e5 (15...Qe7!?+=) 16.Be5 Re5 17.fe5 Qe5 18.Qb3 Bh3 19.Bf3 (worse is 19.gh3 Qg3 20.Kh1 Qh3 21.Kg1 Ng4 22.Bg4 Qg4 23.Kh1 Re8–/+) 19...Qg3 20.cd5?? (better is 20.Rf2 Be6 21.cd5 Nd5 22.Ne4=) 20...Ng4–+ 21.dc6 Kh8 22.Rfe1 (22.Rfd1 Bg2! 23.Bg2 Ne3 24.Qd5 Nd5 25.Nf1–+) 22...Qf2 (22...Rf8 23.Qf7 Rf7 24.Nf1 Qf2 25.Kh1 Rf3 26.gh3 Rh3 27.Nh2 Rh2) 23.Kh1–/+ Bg2! 24.Bg2 Qh4 25.Kg1 Rf8 (25...Rf8 26.Qg8 Kg8 27.Bd5 Kh8 28.Re2 Qg3 29.Kh1 Rf5 30.Rg2 Rh5 31.Kg1 Qe3 32.Kf1 Rh1 33.Rg1 Rg1) 0–1. Parry,HJ – Conway,Bryan, corr, 1967. (=1.Nf3 d5 2.d4 Nf6 3.a3 e6 4.b4 c6)

5.e3 a5 6.b5 Be7=.

5.e3 b5 6.Bb2 (6.Bd2 Ne4=) 6...Be7 (6...a5 7.c3=) 7.Ne5 (7.Bd3 a5=) 7...Nfd7 (7...0-0 8.Bd3+=) 8.f4 (8.Bd3 a5=) 8...Ne5 (8...a5 9.Qd2+=) 9.fe5 0-0 (9...a5 10.Qd2+=) 10.Bd3= Bg5 (10...a5 11.c3=) 11.Qh5 (11.a4 f6 12.ef6 A) 12...gf6? 13.h4 (13.ab5?! Qe7+/–) 13...Be3 14.Rh3+– (14.ab5?! f5+=); B) 12...Qf6?! 13.Rf1 Qe7 14.Rf8 Qf8 15.c3=; C) 12...Rf6=) 11...g6 12.Qh3 (12.Qe2 Bh4 13.g3 Be7=) 12...Bh4 (12...f6 13.0-0=) 13.g3 Bg5 14.g4 (14.e4 f6=) 14...f5 (14...a5 15.0-0=) 15.Bc1 (15.gf5 ef5 (worse is 15...gf5 16.a4+=) 16.Qf3 Bh4 17.Kd1 a5=) 15...Bh4 (15...a5 16.ba5 Qa5 17.Bd2=) 16.Kd1 fg4 (16...a5 17.Bd2=) 17.Qg4+= Qg5 (17...Qe7 18.Nd2 Qg5 19.Qg5 Bg5 20.Nb3+=) 18.Rg1 (18.Qg5 Bg5 19.e4 Bc1 20.Kc1 a5+=) 18...Qg4= 19.Rg4 Be7 20.Ke2 (20.h4 a5 21.ba5 Ra5+=) 20...Nd7 (20...a5 21.ba5 Ra5 22.e4=) 21.e4 (21.Bd2 Nb6+=) 21...Nb6 (21...a5 22.ba5 Ra5 23.Bh6=) 22.Bh6 (22.h4 Kh8+/–) 22...Rf7 (22...Rd8 23.Bd2+=) 23.h4 Bf8 (23...Kh8 24.Bg5+=) 24.Bf8 (24.Bd2 Bg7+=) 24...Kf8 25.Nd2 Bd7 (25...a5 26.Rgg1+=) 26.Rag1 (26.Nf3 Kg7+/–) 26...Ke7 27.h5 (27.Nf3 Raf8 28.Ng5 Rf2 29.Ke1 h5+/–) 27...gh5 28.Rg5 (better is 28.Rh4+/–) 28...de4 (better is 28...h4!?+/–) 29.Ne4+– (29.Be4?! Nd5+=) 29...Nd5 (29...Raf8 30.Nd6 Rf2 31.Kd1+/–) 30.Nd6 Rff8 31.Bh7 (31.Kd2 Be8 32.Rg7 Kd8 33.Rh7 a5 34.ba5 Ra6+–) 31...Kd8 32.Ke1 (32.Be4 a5+–) 32...Kc7+/– 33.Rh5 a5 34.ba5 Ra5 35.Rg3 (35.Rh3 b4 36.Rgg3 Rf4+/–) 35...Ra4 (35...Rf4 36.Ne4 b4 37.Rhh3+/–) 36.Rh4 Nf4 (36...Rh8+/–) 37.Be4 (better is 37.c4!? bc4 38.Be4+–) 37...Rd4+/– 38.Rh7 (38.Rgg4 Nd5+/–) 38...Nd5 (38...Rd6 39.ed6 Kd6 40.Rgg7+=) 39.Rgg7 Nf6? (better is 39...Rd8+/–) 40.ef6+– Rd6 41.f7 Kd8 (41...Rd4 42.Bg6 Rf4+–) 42.Rg8 Ke7 43.Rf8 Kf8 44.Bg6 (44.Bg6 e5 45.Rh8 Kg7 46.Rg8 Kf6 47.f8Q Kg5 48.Be8 Rg6 49.Rg6 Kh4 50.Qh6) 1–0. Anikin,Victor (1910) – Kolosov,Anatoly (1945), Uliyanovsk Championship, 2008. (=1.d4 Nf6 2.b4 d5 3.Nf3 e6 4.a3 c6)

5.Bf4 a5 6.c3=.

5.Bf4 Nbd7 6.e3= Be7 7.Bd3 0-0 (7...a5 8.b5=) 8.Nbd2 h6 (8...a5 9.c3=) 9.0-0 (9.c4 Nh5=) 9...Nh7 (9...Nh5 10.Be5=) 10.c4 (10.Qe2 Nhf6+=) 10...g5 (10...Nhf6!?+=) 11.Bg3+/– f5 (11...Nhf6 12.Ne5+/–) 12.Qe2 (12.cd5 cd5 13.Ne5 Ne5 14.Be5 Nf6+/–) 12...Nhf6 13.cd5 cd5 14.Rfc1 Qe8 15.Ne5 (15.Bc7 Qh5+/–) 15...Ne5 (15...a5 16.Rab1+/–) 16.de5 (better is 16.Be5!? Bd7 17.Nb3+/–) 16...Ne4+= 17.Rc7 b6 (17...Bd7 18.Rb7 Bc6 19.Ne4 de4 20.Re7 Qe7 21.Ba6=) 18.Bb5 (18.Ne4 fe4 19.Bb5 Qd8+/–) 18...Qd8 19.Ne4?? (19.Rac1 Ng3 20.hg3 a6+=) 19...fe4?? (better is 19...Qc7 20.Qh5 Kg7–/+ (20...de4?! 21.Qg6 Kh8 22.Qh6 Kg8 23.Qg6 Kh8 24.Qh6 Kg8 25.Qg6 Kh8 26.Qh6=)) 20.Rac1+/– a6 21.Ba4 b5 22.Bb3 Rf7 23.Qc2 Rf8? 24.Qc6 Qe8 25.Qa8 h5 26.Rc8 Qf7 27.R1c7 h4 28.Rf8 Qf8 29.Rc8 (29.Rc8 hg3 30.Rf8 Bf8 31.Qe8 gh2 32.Kh2+–) 1–0. bicycle – Bull_Dog_Baz, ChessWorld.net, 2007.

8.Bb2 b6 9.Rc1 (9.Bc3 dc4 10.Nc4 Nd5+=) 9...Bb7 (9...a5 10.c5=) 10.Be2 (10.Bc3 dc4 11.Nc4 Qc8=) 10...Rc8 (10...dc4 11.Rc4 Qc7 12.h3=) 11.0-0 c5 12.dc5 bc5 13.b5 White gains space (13.cd5 Nd5 14.b5 Bf6 15.Bf6 N5f6=) 13...Qb6 (13...Ra8 14.Bf6 Bf6 15.Bd3=) 14.a4 dc4 (14...Ra8 15.h3+=) 15.Nc4 Qc7 16.a5 Bd5 17.Ra1 (17.Qa4 Ng4 18.Ncd2 Bf6+=) 17...Bc4 18.Bc4 Rfd8 19.Qc2 Rb8 20.Rfd1 Ne8 21.e4 Black has a cramped position (21.Be2 h6=) 21...Bf6 (21...Nd6 22.Qb3+=) 22.e5 Ne5 23.Ne5 (23.Be5!? is an interesting idea 23...Be5 24.Rd8 Rd8 25.b6 ab6 26.ab6=) 23...Be5–/+ 24.Be5 Qe5 25.Rab1 (25.Rd8 Rd8 26.Rd1 Rc8=) 25...Rd1 (25...Qc7 26.Be2–/+) 26.Rd1 Nd6 (better is 26...Qc7!?–/+) 27.Qd3+= Qd4 28.Qd4 cd4 29.Rd4 Nc4 30.Rc4 g6 31.Rb4 Rc8 32.g3 Kf8 33.b6 ab6 34.Rb6 Ke8 35.a6 Kd7? 36.Rb7+– Kc6 37.Rf7 Ra8 38.a7 Kb6 39.Rf6 Ra7 40.Re6 Kc5 41.h4 Kd5 42.Re1 h5 43.Kg2 Rf7 44.Re8 Rf6 45.f4 Kd6 46.Re5 Rf5 47.Re8 Kd7 48.Ra8 Ke7 49.Kf3 Kf6 50.Ra6 Kg7 51.g4 hg4 52.Kg4 Kh7 53.Re6 Rf7 54.Re5 Kg7 55.Rg5 Kh7 56.h5= gh5 57.Rh5 Kg6 58.f5 Kf6 59.Rh6 Kg7 60.Rg6 Kf8 61.Kg5 Rg7 62.Kf6 Rf7 63.Ke5 Re7 64.Kf4 Kf7 65.Ra6 Kf8 66.f6 Re1 67.Ra7 Rf1 68.Ke5 Re1 69.Kd6 Rd1 ½–½. Hakkinen,Tauno – Hagelberg,Lauri, Lahti op, 2001. (=1.d4 d5 2.Nf3 Nf6 3.Nbd2 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.b4 Nbd7)

8.Bb2 b6 9.Be2 Bb7 10.0-0 c5 11.dc5 bc5 12.b5 Qc7 13.Qc2 e5 (13...a6!?=) 14.cd5+= Bd5 15.h3 (15.e4 Bb7+=) 15...Rab8 16.a4 (16.e4 Ba8+=) 16...Rfd8 (16...Qb7 17.Rfd1=) 17.Rfd1 h6 18.e4 Be6 19.Bc4 Bc4 (19...Rb6!?+/–) 20.Nc4+– (20.Qc4?! a6+=) 20...Qb7 21.Nce5 Ne5 22.Ne5 Qe4 23.Qe4 Ne4 24.Nc6 Rd1 25.Rd1 Re8 26.Na7 Bf6? (better is 26...c4 27.Bd4 Bg5+–) 27.Bf6 Nf6 28.b6 Re7 29.a5 Rb7 (29...Rd7 30.Rb1 Rd6+–) 30.Nc8 Ne4 (30...Nd7 31.a6 Rb6+–) 31.a6 Rb8 32.b7 1–0. Iosif,Daniela – Wiegand,Ronny, Darmstadt Weber Memorial op, 1997. (=1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.a3 Be7 6.Nbd2 0-0 7.b4 Nbd7)

8.c5 a5 9.Bb2 b6 10.Rc1 ab4 (10...Qc7 11.Qc2=+) 11.ab4 bc5 (11...Qc7 12.Qc2=+) 12.bc5 Ba6 (12...Qc7 13.Bd3=+) 13.Ba6= Ra6 14.0-0 Qc7 (14...Ne4 15.Ne4 de4 16.Nd2=) 15.h3 (15.Qc2 Ra2 16.Ra1 Rfa8=) 15...Rfa8 (15...Rb8 16.Ra1 Ra1 17.Qa1=) 16.Qc2 h6 17.Ra1 Qb7 (17...Ra1 18.Ra1 Ra1 19.Ba1=) 18.Ra6 Ra6 19.Rb1 Bd8 20.Bc3 Qa8 21.Ne1 Ra7 ½–½. Rustemov,Alexander (2540) – Gyimesi,Zoltan (2595), Schachbundesliga, 2010. (=1.c4 Nf6 2.d4 e6 3.Nf3 d5 4.e3 Be7 5.Nbd2 0-0 6.a3 Nbd7 7.b4 c6)

8.Bd3 b6 9.0-0 a5 10.ba5 Ra5 11.Bb2 Qc7 12.Qb3 A) 12...Ra7 13.Rfe1 (13.a4 Ba6 14.Rfc1 Rfa8 15.cd5=) 13...Bd6 14.e4 de4 15.Ne4=; B) 12...Ra8 13.Rfb1 (13.a4 Bd6 14.Ba3 c5 15.Rfb1=; 13.Rfe1 Rd8 14.Qc2 Ba6 15.e4=) 13...Bd6 14.Qc2 Rd8 15.cd5=; C) 12...Rd8 13.Rfc1 (13.cd5 ed5 14.Rfc1 Bd6 15.Qc2=; 13.Qc2 Bb7 14.a4 Rda8 15.Bc3=; 13.Bc3 Ra7 14.a4 c5 15.Rfc1=; 13.Rfd1 Bd6 14.Qc2 Ba6 15.Rdc1=) 13...Bd6 14.Qc2 Ba6 15.a4+=; D) 12...Qa7 13.a4 (13.Rfc1 Qa8 14.Ne5 Bb7 15.cd5+=; 13.Rfd1 Ra4 14.cd5 ed5 15.Ne5+=; 13.Rfe1 Rd8 14.a4 Qc7 15.cd5=; 13.Ne5 Ne5 14.de5 Nd7 15.Qc2=) 13...Qa8 14.Rfc1 Bd6 15.cd5+=; E) 12...Bd6 13.Rfd1 (13.Bc3 Ra7 14.Rfb1 Rd8 15.a4=; 13.Rfb1 Ra8 14.e4 de4 15.Ne4=; 13.Rfc1 Re8 14.Bc3 Ra7 15.Bb4=; 13.Rfe1 Rd8 14.Rec1 Re8 15.Qc2=) 13...Rd8 14.Qc2 Ba6 15.Rdc1=.

8.Bd3 b6 9.0-0 a5 10.ba5 Ra5 11.Bb2 Qc7 12.Qc2 g6 (12...Re8 13.Rfd1 (13.Rfc1 Bb7 14.cd5 ed5 15.Ne5+=) 13...Bb7 14.Ne5 Rea8 15.Rab1=; 12...Bb7 13.Rfc1 (13.cd5 ed5 14.Rfc1 Rfa8 15.Ne5=; 13.a4 Rfa8 14.Bc3 R5a7 15.Rfb1=; 13.Nb3 dc4 14.Qc4 Ra7 15.Qc2=; 13.Rfb1 Rfa8 14.a4 Bb4 15.Bc1=) 13...Rfa8 14.cd5 ed5 15.Ne5=) 13.Rfc1 (13.Nb3 Ra7+= 14.cd5 ed5 15.Rfc1=; 13.Rfb1 Rd8 14.a4 Ra7 15.cd5+=; 13.cd5 ed5 14.Nb3 Ra7 15.Rfc1=; 13.Rfd1 Bb7 14.cd5 ed5 15.Rdc1=; 13.Rfe1 Bb7 14.Be2 Rfa8 15.cd5=) 13...Bb7 14.cd5 (14.a4 Rfa8= 15.Be2=; 14.c5 Ba6 15.cb6=) 14...ed5 15.a4 (15.Ne5 Ne5 16.de5 Nd7=; 15.Qc3+=) 15...Rc8 (15...Rfa8 16.Bc3 R5a7 17.Qb3=) 16.Nb3 (16.Bc3 Ra7+=) 16...Raa8 (16...Ra7 17.a5+=) 17.Bc3 c5 18.dc5 bc5 19.Nbd2 c4 (19...Bd6 20.h3+=) 20.Be2+= Nc5 21.Rcb1 (21.a5 Nfe4 22.Be5 Bd6 23.Ne4 de4 24.Bd6 Qd6=) 21...Ra6 (21...Nfe4 22.Be5 Qd7 23.a5=) 22.Be5 (22.Nd4 Nfe4 23.Ne4 Ne4=) 22...Qd8 23.Nd4 (23.Rd1 Bc6 24.a5 Ra5+=) 23...Rca8 24.Rb5 Bc8 25.Bf3 Ng4 26.Bg3 (26.Bf4 Bd7 (26...Ra4 27.Ra4 Ra4 28.Nc6+/–) 27.Rbb1 Nf6–/+) 26...Bd7 (worse is 26...Ra4 27.Ra4 Ra4 28.Nc6 Ra1 29.Rb1 Rb1 30.Nb1+/–) 27.Rab1 (27.Rc5 Bc5 28.Bd5 Ra4 29.Ra4 Ra4 (worse is 29...Ba4 30.Qc4 Ra5 31.Bf7 Kh8 32.h3 Bd4 33.Qd4 Qd4 34.ed4+/–) 30.Bc4 Qe7+=) 27...Bb5+= 28.Nb5 Ra4 (28...Nf6 29.Nc7=) 29.Bg4 (29.Nc3 Ra3 30.Bg4+=) 29...Bf6 (29...c3!? 30.Nc7 R8a7= (worse is 30...Rg4 31.Na8 Na6 32.Nc7 Nc7 33.Qc3+/–; worse is 30...cd2 31.Na8 Ra8 32.Qd2=)) 30.Bc7+= Qe8 31.Bd6 (31.Nc3 Bc3 32.Qc3 Ne4–/+) 31...Ra2= 32.Qd1 Qc6 33.Qf3 (33.Bc5 Qc5 34.Nf1 c3–/+) 33...Rd2 (33...Bg7 34.Bc5 Qc5 35.Nf1–/+) 34.Qf6 Ne4 35.Qe5 c3 36.Nc3 (better is 36.Nc7!? Rc8! 37.Rc1–+) 36...Nc3 37.Rf1 Qc4 (37...Ne4 38.Bb8–+) 38.g3 Ne4 39.Bb8 (39.Bh3 Qe2 40.Qf4 g5–+) 39...Qb5 40.Bd6 Ra6 (40...Re8 41.Qf4 g5 42.Qf5 Nd6 43.Qg5 Kf8 44.Qh6 Ke7 45.Qh4 f6 46.Qh7 Nf7 47.Ra1–+) 41.Be7 Raa2 42.Rc1 Rdc2 43.Rc2 Rc2 44.Qa1 h5 (44...Nf2?? 45.Qa8 Qb8 46.Qb8 Rc8 47.Qc8 Kg7 48.Qf8) 45.Bf3 Rb2 (45...Qc4!? 46.Ba3 Ra2 47.Qe5 Ra3 48.Qe8 Kg7 49.Qe5 Kh7 50.Be4 de4 51.Kg2–+) 46.Be4 de4 47.Kg2 Qe2 (47...Qe2 48.Qb2 Qb2–+) 0–1. Ling,AJ (2060) – Reinhart,Kenneth M (2470), corr ICCF WSTT/3/06/3, 2006.

8.Bd3 b6 9.0-0 a5 10.ba5 Ra5 11.Bb2 Qc7 12.Re1 A) 12...Rd8 13.Qc1 (13.Qb3 Bd6 14.Rec1 Re8 15.Bc3=; 13.Qc2 Bb7 14.a4 Rda8 15.cd5=) 13...Bd6 14.Qc2 Ra7 15.cd5=; B) 12...Qd6 13.Qc2 (13.Qe2 Rd8 14.cd5 Qd5 15.e4+=; 13.Rb1 Rd8 14.Qc2 Ra7 15.Ne5=; 13.Rc1 Ra7 14.Ne5 Bb7 15.cd5=; 13.e4 de4 14.Ne4 Ne4 15.Re4=) 13...Ra7 14.e4 de4 15.Ne4+=; C) 12...Ra7 13.Qb3 (13.e4 de4 14.Ne4 Ne4 15.Be4=; 13.Qc2 Ba6 14.e4 Rfa8 15.Qb3=; 13.Qe2 Ba6 14.e4 Rfa8 15.Rac1=; 13.Qb1 Ba6 14.e4 de4 15.Ne4=) 13...Bd6 14.e4 de4 15.Ne4=; D) 12...Bb7 13.Qb3 (13.Nb3 Ra7 14.Nbd2 Rfa8 15.Qb3+=; 13.cd5 ed5 14.Qb3 Rfa8 15.Rec1=; 13.e4 de4 14.Ne4 Rfa8 15.Qb3=; 13.Qc2 Rfa8 14.cd5 ed5 15.a4=) 13...Rfa8 14.cd5 ed5 15.Rec1=.

5.Nc3 a5 6.b5 c6 7.Bg5= 0-0 8.e3 Nbd7 9.e4 e5 10.bc6 bc6= 11.ed5 ed4 12.dc6 Re8 13.Ne2 Nc5= 14.Bf6 Qf6 15.Qd4 Qg6 16.Rd1 Ne4 17.Qd3 Ba6 18.c4 Rad8 19.Nfd4 Bc5 20.Qe3 Bc4 21.c7–/+ Rc8 22.Nf4 Qa6 23.Be2 Be2 24.Nfe2=+ Bd4 25.Rd4 Ng3 26.Rd8 Qb5?? 27.Qe8+– (27.Qe8 Qe8 28.Re8 Re8 29.hg3+–; 27.hg3?! Qb1 28.Rd1 Qd1 29.Kd1 Re3 30.fe3 g6+–; 27.fg3?! Red8 28.cd8R Rd8+–; 27.Ng3?! Red8 28.cd8R Rd8+–) 1–0. iodine (1845) – Hatch (1765), internet, 2007.

5.c4 dc4+= 6.Nc3 (6.Bg5 b5+= (6...h6 7.Bf6 Qf6 8.e4 Qg6 9.e5 Bf8 10.Nc3 c6 11.Nd2) 7.e4 Be7 8.Nc3 c6 9.Bf6 Bf6 10.Be2 a5 11.0-0; 6.Qc2 b5 7.e4 Be7 8.Nc3 c6 9.Be2 a5 10.ba5 0-0 11.0-0) 6...Nd5 7.Na2 (7.Nb5 Be7 8.Bd2 0-0 9.e4 c6 10.Nc3 Nc3 11.Bc3) 7...f5 (7...Nb6 8.e4 a5 9.b5 c6 10.Nc3 Bd7 11.bc6) 8.Bg5 Qd7 9.e3 (9.Qc2 b5–/+ (9...a5 10.ba5 Ra5 11.Qc4) 10.Ne5 Be5 11.de5; 9.Rc1 b5 10.Bd2 0-0 11.Nc3) 9...b5 10.a4 (10.Qd2 a5 (10...h6 11.Bh4) 11.ba5 Nc6–/+) 10...Nb4 (10...a6 11.Ne5 Be5 12.de5–+) 11.Qb1 (11.ab5 Na2 12.Ra2 Bb4 13.Ke2 Qb5–/+) 11...Na2–+ 12.Ra2 c6 13.Be2 0-0 14.0-0 Na6 (14...a6 15.Ne5 Qc7 16.Bf4–/+) 15.Rc1 (15.Ne5 Be5 16.de5 Rb8–/+) 15...Nb4–+ 16.Rd2 (16.Ra1 a5–+) 16...a5 17.Rb2 (17.Qb2 Rb8–+) 17...Ba6 18.Qa1 Nd3 (18...h6 19.Bf4 Bf4 20.ef4–+) 19.Bd3 cd3 20.Bf4 Bf4 21.ef4 ba4 22.Qa4 Bb5 23.Qa3 (23.Qd1 Qd6–+) 23...Rfd8 24.Re1 (24.Qc3 a4–+) 24...Qd6 25.Qa2 Re8 (25...Qd5 26.Qa1–+) 26.Rbb1 (26.Re5 Kh8–/+) 26...a4 (26...Qf4?! 27.Re6 Kh8 28.Re8 Re8 29.Ne5 Re5 30.de5 Qe5 31.Qa5=) 27.Ra1 (27.Re5 Kh8–+) 27...a3 (worse is 27...Qf4 28.Re6 Kh8 29.Re8 Re8 30.Ne5 Re5 31.de5 Qe5 32.Rb1–/+) 28.Qb3 (28.Re5 Ra4–+) 28...Ra6 (28...Ra6 29.Re5 Ra4–+; 28...Ra4 29.Re5–+) 0–1. Schulz,Hans_Juergen (2305) – Goesmann,Stefan (2100), RSX9E – A00 – Sokolsky–2, 2004.

5.Nbd2 0-0 6.c4 a5 (6...b6 7.c5 Be7 8.Ne5=) 7.b5 (7.c5 Be7 8.b5 b6=) 7...Nbd7 (7...c5 8.cd5 ed5 9.dc5 Bc5 10.e3=) 8.c5+= Be7 9.e3 c6 (9...Rb8 10.Bd3+=) 10.Qa4 (10.Rb1+=) 10...e5 (10...cb5!? 11.Bb5 Ne4+=) 11.bc6+/– bc6 12.Ne5 (12.Qc6 Rb8+/–) 12...Ne5+= 13.de5 Nd7 (13...Ng4 14.Qc6 Be6 15.Bb2+/–) 14.Qc6+/– Rb8 15.Qd5 Qc7 16.Ra2 (16.e6!? Nc5 17.ef7 Rf7 18.Qa2+=) 16...Nc5 17.Rc2 (17.Qf3 Nb3 18.Nb3 Rb3=) 17...Rd8 (17...Bf5 18.e4 Rfd8 19.Qa2+=) 18.Qc4 (18.Qe4 Be6+=) 18...Be6 (18...Qe5 19.Nf3 Qd6 20.Rd2=) 19.Qc3+= Qd7 (19...Rd5 20.e4 Re5 21.f4+/–) 20.Qd4 (20.Qa5!? Qd5 21.Qc3+/–) 20...Qc6 21.Qc3 (21.Qa1 Qa4 22.Rc3 Nb3 23.Nb3 Bb3=) 21...Rbc8 (21...Bf5 22.e6 fe6 23.Bb2+=) 22.Qb2 (22.Qa5 Bf5 23.Rc4 Nd3 24.Kd1 Nf2 25.Ke1 Nd3 26.Kd1 Bg4 27.Kc2–+) 22...Bf5+= 23.e4 (23.Rc4 Nd3 24.Bd3 Qg2 25.Rf1 Bd3 26.Rc8 Rc8 27.h3–+) 23...Be4–/+ 24.h4 (better is 24.Rc4 Bd3 25.Rc3–/+) 24...Bc2 25.Qc2 Nd3!! (25...Nd3 26.Bd3 Qg2 27.Bh7 Kf8–+) 0–1. Herrchen,Ralf – Woelfelschneider,Peter, TT–17 ETC, 2005.

5.Nbd2 a5=+ 6.ba5 Ra5 7.c4 dc4 (7...0-0 8.c5 Be7 9.e3=+) 8.Nc4= Bb4 9.Bd2 Bd2 10.Qd2 Ra4 (10...Rd5 11.e3=) 11.Qc2 Ra7 12.e3 Nc6 13.Be2 0-0 (13...Nb4 14.Qb3 Nbd5 15.0-0+=) 14.0-0 Bd7 15.Rfc1 (15...Qe7 16.Nfe5+=). Gall,Zdenek – Pane,Alberto (+), corr 3GMM–27, 1996.

5.Nbd2 a5 6.b5 0-0 7.c4 c6 8.c5= Be7 9.a4 Nbd7 10.e3 e5 11.Be2 e4= 12.Ng5 Nb8 13.Bb2 h6 14.Nh3 Bh3 15.gh3 Qd7 16.Bf1 Qf5 17.Rg1 Nbd7 18.Bc3 Rfb8 19.Nb3 cb5 20.ab5 b6 (20...b6 21.Rc1 a4–/+). Neinsah – Sandeman_be, ChessWorld.net, 2005.

5.Nbd2 b5 6.e3= c6 7.c3 (7.a4 Bd7=) 7...a5+= 8.Nb3 a4 (8...ab4 9.cb4 0-0 10.Bd3=) 9.Nbd2 0-0 10.Qc2 (10.Bd3 Nbd7+=) 10...Nbd7+= 11.e4 e5 12.ed5 e4 (better is 12...Nd5!? 13.Bd3 N5f6=) 13.dc6+= ef3 14.cd7 Qe7 (14...Bd7 15.Nf3 Re8 16.Be3+=) 15.Kd1 Bd7 (15...Bb7 16.Nf3 Qd7 17.Bg5=) 16.Nf3 Be6 17.Rb1 (17.Qe2 Nd5 18.Bd2 Rfc8=) 17...Qb7 (17...Bb3 18.Rb3 ab3 19.Qb3=) 18.Bd3 (18.c4 bc4 19.Ng5 Bd5+=) 18...Rfe8 19.Re1 h6 (19...Bb3 20.Rb3 Re1 21.Ke1 ab3 22.Qb3+=) 20.Be3 Rac8 (20...Bb3 21.Rb3 ab3 22.Qb3+=) 21.Re2 (21.h3 Nd5 22.Bd2 Re7+=) 21...Bd5= 22.Qb2 (22.Bf5 Be4 23.Be4 Ne4+=) 22...Bf3 (22...Ng4 23.Kc1=) 23.gf3 Bh2 24.Rc1 Re7 (24...Bd6 25.Kc2=) 25.Re1 (25.c4 bc4 26.Rc4 Rc4 27.Bc4 Qf3=) 25...Nd5 Attacking the backward pawn on c3 (25...Bd6 26.f4=) 26.Be4 (26.c4 Ne3 27.Re3 Bf4 28.Re7 Qe7=) 26...Qd7 (26...Bd6 27.Kd2=) 27.Rh1 Bf4 (27...Bb8 28.Rh5 Nf6 29.Bf5=) 28.Bf4 (28.Qd2 Bb8+=) 28...Nf4= 29.Qc2 (29.Qd2 Nd5=) 29...Qe6 (29...Qd6 30.Qd2=) 30.Bf5 (30.Qd2 Qd6=) 30...Qc6 Threatening mate... how? 31.Be4 (31.Bh7 Kh8 32.Be4 Nd5=) 31...Qc4+= 32.Re1 (32.Bh7 Kh8 33.Be4 Rce8+=) 32...Rce8 (32...f5 33.Bf5 Re1 34.Ke1 Re8 35.Be4 Nd3 36.Kd1 Nc1 37.Kc1+=) 33.Re3 (33.Rh1 Re6+=) 33...f5 34.Bd3 (34.Bf5 Qf1) 34...Qd5 (34...Qd5 35.Re7 Re7+=). Baer,Werner – Woelfelschneider,Peter, TT–07 ETC, 2003.

5.Nbd2 Nbd7 6.c4 c6 7.e3 0-0 8.Bb2 Qe7 9.Ne5 Ne4 10.Ne4 de4 11.Qc2 f5 12.Be2 Qf6 13.Qc3 Nb6 14.0-0 Na4 15.Qb3 Nb2 16.Qb2 Qh6 17.c5 Bc7 18.a4 Bd7 19.a5 a6 20.f4 ef3 21.Rf3 Rad8 22.Bc4 Be5= 23.de5 Be8 24.Raf1+= Bh5 25.Rf4 Rfe8 26.Rf5+/– Qe3 27.Qf2 Qf2 28.R1f2 Bg6 29.R5f4 h5 30.h3 Rd1 31.Rf1 Rf1 32.Rf1 Kh7 33.Rd1 Re7 34.Rd6 Bf5 35.Rd4 Kh6 36.g4 hg4 37.hg4 Bg6 ½–½. Ritter,Fredi (1700) – Milde,Lars (1815), TSC, 2003.

5.e3 a5 6.b5 0-0 7.c4 c5 8.dc5 Bc5 9.Bb2 Nbd7 10.Nc3 Re8 (10...Nb6 11.Na4 Be7 12.Nb6 Qb6 13.Bd4=) 11.cd5= Nb6 12.de6 Be6 13.Qd8 Red8 14.Be2 Rac8 15.0-0 Nc4 16.Bc4 Bc4 17.Rfd1 h6 18.Rac1 Rd1 19.Rd1 Bb3 20.Rc1 Bd6 21.Nd4 a4 22.Nb3 ab3 23.Ne2 Ra8 24.Rd1 Be7 25.Nd4 Ne4 (25...Ba3?? 26.Ra1 Ne4 27.Ra3 (27.Ba3?! Nd2 28.Bb2 Ra2 29.Ra2 ba2+–) 27...Ra3 28.Ba3+–) 26.Nb3 Nd6 27.Ra1 Nb5 28.a4 Nd6 29.Kf1 f6 30.Ke2 Kf7 31.Kd3 Ne8 32.Bd4 f5 33.a5 Nc7 34.Rb1 Na6 35.Rc1 Ba3 36.Rd1 Rd8 37.h3 Be7 38.Rc1 g6 39.g4 Nb4 40.Ke2 Rd5 41.Bb6 Na6 42.f4 Bf6 43.Nd2 Ke6 44.Rc8 Rb5 45.Nc4 g5 46.Re8 Kd7 47.Rf8 Ke7 48.Ra8 Ke6 49.Kf3 Kd5 50.Rc8 Rb4 51.Nd2 gf4 52.ef4 Ke6 53.Nf1 Rb3 54.Ne3 fg4 55.hg4 Kf7 56.Ke4 Rb4 57.Rc4 Be7 58.Rb4 Nb4 59.Nf5 Bf8 60.Kd4 Ke6 (60...Kg6 61.Kc4 Nc6 62.Kb5+–) 61.Kc4 Nc6 (61...Na6 62.Be3 Kf6 63.Bd4 Kf7 64.Be5+–) 62.Nd4 Nd4 63.Bd4 (63.Kd4?! Bb4+–) 63...Kf7 (63...Bd6 64.f5 Kf7 65.Be3+–) 64.Be5 (64.Bc5!? Bg7+–) 64...Be7 65.Bc3 Bd6 66.Bd2 Kf6 67.Kd5 Be7 (67...Ba3 68.Bc3 Kf7 69.f5+–) 68.f5 Bf8 69.Ke4 Kg7 70.Bc3 Kf7 71.Kd5 Ba3 72.Bd2 1–0. Taulien,Hans_Juergen (2350) – Haas,Uwe (2275), RSX5D – X–Mas, 2005.

5.e3 b6 6.Bb2 Bb7 7.c4 c5 8.b5 Nbd7 9.Nbd2 a6 10.a4 0-0 11.Be2 Qc7 12.0-0 (12.dc5 Qc5 13.cd5 Nd5= (13...Qd5? 14.e4 Qh5 15.e5+–)) 12...Rfe8 (12...cd4 13.ba6 Ba6 14.ed4 dc4 15.Rc1+=) 13.Qb3 Bf8 14.h3 Rad8 (14...ab5 15.ab5 cd4 16.ed4+=) 15.Rfc1 Rc8 16.Qd1 Qb8 (16...a5!?=) 17.cd5 ab5 (17...Bd5!? 18.ba6 cd4 19.Nd4 Qa8+=) 18.de6 Re6 19.Bb5 Bc6 20.Bc4 Ree8? (better is 20...Bd5!?+/–) 21.Qb3+– Re7 22.Ng5 Qb7? (22...Qa8 23.Nf7 Rc7+–) 23.Nf7 (23.Bf7?! Kh8+–) 23...Rf7 24.Bf7 Kh8 25.f3 Nd5 (25...cd4 26.ed4 Ra8 27.Nc4+–) 26.e4 Nf4 27.Qe3 White prepares e5 27...Qc7 28.d5 Bb7 29.Nc4 White plans e5 29...Ba6 (29...Nf6 30.Ne5 N6h5 31.Bh5 Nh5 32.Qb3+–) 30.e5 Bc4 31.Rc4 Ng6 (31...Ne5 32.Qe5 (32.Qf4?! Nc4 33.Qc4 Qf7+/–) 32...Nh3 33.gh3 Qf7 34.Qe6+–) 32.d6 Qc6 33.Bg6 hg6 34.e6 Bd6 (34...Qd6 35.Qh6 Kg8 36.Qg6+–) 35.ed7 (35.Qh6! Kg8 36.Qg7) 35...Qd7+– 36.Rh4 Kg8 37.Qb3 (better is 37.Rd1 Qe7 38.Qc3+–) 37...Kf8 (37...c4 38.Rc4 Rc4 39.Qc4 Kh7+–) 38.Rh8 Ke7 39.Re1 (39.Re1 Be5 40.Re5 Kd6 41.Rc8 Qc8 42.Qd5 Kc7 43.Re7 Kb8 44.Be5 Qc7 45.Re8 Ka7 46.Qa8) 1–0. Filzmeier,Bruno – Wendlinger,Peter, Vienna op–B, 1998. (=1.a3 d5 2.d4 e6 3.Nf3 Bd6 4.e3 Nf6 5.b4 b6)

5.e3 c6 6.c4 dc4 7.Bc4 b5 8.Bb3 Ne4 9.0-0 Qf6 10.Ra2 0-0+= 11.Bb2 Qg6 12.g3 Ng3?? 13.fg3+– Bg3 14.hg3 Qg3 15.Kh1 Qh3 16.Nh2 Bb7 17.Qg4 c5 18.Rf3?? Bf3 19.Qf3+– Qf3 20.Nf3 cd4 21.Bd4 Nc6 22.Bc5 Rfd8 23.Rd2 Rd2 24.Nbd2 a6 25.Ne4 Rd8 26.Nd6 h5 27.Kh2 Ne7?! 28.Ng5 Ng6 29.Ngf7 Rb8 30.Be6 Kh7 31.Bf5 Ra8 32.e4 a5 33.Ng5 Kh6 34.Ndf7 1–0. johntelker (2070) – jomunoz (1810), net–chess.com, 2010.

5.e3 Nc6 6.c4 Bd7 (6...dc4!? 7.Bc4 0-0=) 7.c5+= Be7 8.Bd3 0-0 9.0-0 Re8 10.Nc3 b6 11.b5 Na5 12.c6 Bc8 13.Ne5 Bd6 14.Rb1 Nc4 (14...a6!?+/–) 15.Bc4 dc4 16.Nc4 e5?? (better is 16...a6 17.Qa4 e5 18.de5 Be5 19.Ne5 Re5+/–) 17.de5+– (17.Ne5?! Bf5 18.Rb2 Be5 19.de5 Re5+/–) 17...Be5 18.Qd8 Rd8 19.Ne5 g6 20.e4 Kg7 21.Bh6! Kg8 22.Bg5 Kg7 23.Nf3 h6 24.Bf6 Kf6 25.Nd5 Kg7 26.Nc7 Rb8 27.h3 g5 28.Rbd1 Rf8 29.Ne5 f6 30.Nd7 Bd7 31.Rd7 Kg6 32.Nd5 h5 33.Ne7 Kh6 34.Nf5 Kg6 35.Rg7 1–0. David Lonsdale – pieeater, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.a3 Nf6 4.d4 Bd6 5.e3)

5.e3 Bd7 6.Bd3 (6.Bd3 0-0 7.0-0=). Conveyor – MiserableBoris, ChessWorld.net, 2005.

5.e3 Ne4=.

5.Nf3 Nbd7 6.Bb2 0-0 7.c4 dc4 8.Bc4 a6 9.Bd3 h6 10.e4 Be7 11.0-0 b6 12.Nc3 c5 (better is 12...Bb7!?+/–) 13.e5+– Nd5 14.Nd5 ed5 15.dc5 bc5 16.Bc2 Nb6 17.Qd3 g6 18.bc5 Bc5? (better is 18...Nc4 19.Bc1 Bf5+=) 19.e6!+– Be6? (19...Be6 20.Qc3 Combination; 19...fe6 20.Qg6#) 20.Qc3 d4 21.Qc5 Rc8 22.Qd4 Qd4 23.Nd4 Bc4 24.Rfe1 Nd5 25.Rad1 Nf4 (25...Rfd8 26.Nf3+–) 26.Bc1 Nd5 27.Bh6 Rfd8 28.Nf3 Nf6 29.Rd8 Rd8 30.Bg5 Rd6 (30...Kg7 31.Re7+–) 31.Ne5 Bb5 (31...Bd5 32.Rd1 Kg7 33.h4+–) 32.Bb3 Be8 (32...Nd7 33.Bf7 Kg7+–) 33.Nc4 (33.Nc4 Rc6 34.Bf6 Rf6 35.Re8 Kg7 36.Re7+–) 1–0. capablancaven (1900) – cougarbait (1620), gameknot.com, 2011.

5.g3 a5 6.Qd2? (better is 6.b5=) 6...ab4–+ 7.e3 (better is 7.c3 b3 8.Qd1–+) 7...Nc6 8.Bd3 e5 9.h3 (9.Ne5 Ne5 10.de5 Be5 11.c3–+) 9...e4 10.Ke2 (10.Bb2 0-0 11.ab4 Bb4 (11...ef3?! 12.Ra8 Nb4 13.Qd1=; 11...ed3?! 12.Ra8 dc2 13.Qc2+=) 12.Ra8 Bd2 (12...ef3 13.c3 Bd6 14.Qd1+/–; 12...ed3 13.c3 Bd6 14.Qd3+=) 13.Nbd2 ed3 14.cd3 Re8–+) 10...ef3 (10...Qe7 11.Kf1–+) 11.Kf3 g5 (better is 11...0-0 12.Kg2 Qe7 13.c3–+) 12.Kg2 g4 (12...Qe7!? 13.c3 b3 14.Qb2–+) 13.hg4 Bg4 (worse is 13...Ng4 14.Bb2 f5 15.ab4 Ra1 16.Ba1 Nb4 17.Nc3–+) 14.f3 (14.Bb2 Ne4 15.Be4 de4–+) 14...Bh5 (better is 14...Bc8 15.g4 Rg8 16.Kf1–+) 15.e4 (15.Bb2 Rg8 16.Rh3 Qd7–+) 15...Rg8 (better is 15...Nd4 16.Rh5 Nh5 17.Bb5 Nb5 18.Qd5 c6 19.Qh5 Qf6–+) 16.Qh6 (16.e5 Nd4 17.Re1–+) 16...Rg6 (better is 16...Rg3 17.Kf1 Rf3 18.Kg2 Rg3 19.Kf1–+) 17.Qe3 (17.Rh5 Rh6 18.Rh6 de4 19.fe4–+) 17...Rg3 18.Kf2 Bg6 (better is 18...Rf3 19.Kg2 Re3 20.Be3 de4 21.Be4 Ne4 22.Rh5 Qf6–+) 19.ed5 Ne4 20.Ke1?? (20.Be4 Ne7 Combination; 20.fe4 Re3 Pinning (20...Qf6 Deflection)) 20...Qd7 (better is 20...Rf3! 21.Qf3 Nd4–+) 21.Be4?? (better is 21.dc6 bc6 22.Be4+–) 21...Na5?? (21...Ne7 22.Bg6 fg6 23.Rh7+=) 22.Kf2 (better is 22.Bg6 Qe7 23.Qe7 Ke7 24.Bh7+–) 22...Nc4+= 23.Qd3? (23.Qe2 Qe7 24.Nd2 Nd2 25.Bd2 ba3–/+) 23...b5 (better is 23...f5 24.Qc4 fe4–+) 24.Rh4?? (better is 24.Bg6 fg6 25.Nd2–/+) 24...Qe7 (better is 24...f5 25.Nd2 Qe7–+) 25.c3 (25.c3 Qh4 26.Bd2 Qh2 27.Ke1 Rg1 28.Qf1 Rf1 29.Kf1 Bg3 30.Bg6 Qf2) 0–1. Buresch,Rene (1960) – Haeckel,Sascha (2000), remoteschach.de, 2002.

5.Bg5 0-0+=.

5.Bg5 a5 6.b5 (6.b5 h6 7.Bh4=). andre2004 – magne, ChessWorld.net, 2005.

5.h3 0-0 6.Bg5 h6 7.Bh4 Nbd7 8.Nc3 a6 9.e3 b6 10.Bd3 c5 11.e4 de4 12.Be4 Rb8 13.dc5 Bc7 14.c6 Ne5 15.Qd8 Rd8 16.Bf6 gf6 17.Rd1 Rd1 18.Kd1 f5 19.Bd3 Nc6 20.Re1 Bb7 21.b5 ab5 22.Nb5 Bd8 23.Nd6 Be7 24.Nb5 Ra8 25.Nd2 Ba3 26.Na3 Ra3 27.Nc4 Ra1 28.Kd2 Re1 29.Ke1 Nb4 30.f3 Ba6 31.Ne5 Bd3 32.cd3 f6 33.Nd7 Nd3 34.Ke2 Nf4 35.Kf2 Nd5 36.g3 Kf7 37.Ke2 Ke7 38.Nb8 e5 39.Kd3 b5 40.Nc6 Kd6 41.Na5 Kc5 42.Nb7 Kb6 43.Nd6 f4 44.g4 b4 45.Kc4 Ne7 46.Kb4 Kc6 47.Nf7 Kd5 48.Kc3 e4 49.fe4 Ke4 50.Kd2 Kf3 51.Nh6 Kg2 52.g5 fg5 0–1. axxle (2260) – pushtiu (2120), net–chess.com, 2014. (=1.d4 d5 2.Nf3 e6 3.a3 Nf6 4.b4 Bd6)

6.Bb2 Nc6 7.c4 e5?? 8.c5?? Be7 9.de5 Ne4 10.Bd3 Bg4 11.Bd4 Nd4 12.ed4 Bf3 13.gf3 Ng5 14.Nc3 a5 15.f4 ab4 16.ab4 Ne4?? 17.Be4 de4+/– 18.Ne4 b5 19.0-0 Ra1 20.Qa1 c6 21.Nd6 Bd6+/– 22.cd6 Qh4 23.Qc1 f6?? 24.Qe3 fe5 25.de5 Rf4 26.Kh1 Qg4?? 27.e6 Rf3 28.Qe2 Qh3 29.e7 (29.e7 Qd7 30.Qa2 Rb3 31.Qb3 Kh8 32.Re1 h6 33.e8Q Qe8 34.Re8 Kh7 35.Qd3 g6 36.Re7 Kh8 37.Qc3 Kg8 38.Qg7) 1–0. johntelker (2070) – neilb (1930), net–chess.com, 2010.

6.c4= dc4 7.Bc4 a5 8.b5=.

6.c4= dc4 7.Bc4 c6 8.Qc2 Nbd7 (8...b5 9.Bd3 a5 10.ba5 Qa5 11.Nbd2=) 9.Bb2 (9.e4 e5 10.0-0 ed4 11.Nd4 Nb6+=) 9...a5 10.e4 Be7 11.b5 Nb6 12.Bd3 cb5 13.e5 Nfd5 14.Bh7 Kh8 15.Be4 Bd7 16.Qd1 (16.0-0 Rc8 17.Qe2 Nc4=) 16...b4 (16...Nc4 17.Nfd2 Kg8 18.Nc4 bc4 19.Nc3=) 17.Nh4 (17.Nfd2 Nf4=) 17...g6 18.Nf3 Bb5 (18...Nc4 19.Qc1 ba3 A) worse is 20.Na3 Nb2 21.Qb2 Bb4 22.Ke2 Bc3 23.Qb7 Nf4 24.Ke3 Ng2 25.Kd3 Rb8–+ (25...Ba1?! 26.Qa8 Qa8 27.Ba8+=); B) 20.Qh6 Kg8 21.Bc1=) 19.h4 (19.Bc1 a4=) 19...Nf4 20.Rh2 Kg8 (20...Nbd5 21.h5 gh5 22.g3 ba3 A) worse is 23.gf4 ab2 24.Nfd2 Nf4 (24...ba1B?? 25.Qh5 Kg7 26.Qh7) 25.Rh5 Kg7 26.Rh7 Kg8 27.Qg4 Bg5–/+; B) 23.Ba3+/–) 21.g3 Be2 22.Qd2 Bf3 23.Bf3 Nc4 24.Qf4 Nb2 25.Be2 (25.Qe4 ba3 26.h5 Qc7+=) 25...Rc8= 26.ab4 Bb4 27.Kf1 Qc7 (27...Nc4 28.Kg1=) 28.Qg4+= Qc1 29.Kg2 Qc6 (29...Nc4 30.Bc4 Qc4 31.h5+=) 30.Bf3+= Qc2 31.Na3 (31.Be4 Nd3 32.Bd3 Qd3+=) 31...Ba3 (31...Qa4 32.h5 Ba3 33.hg6 Rc1 34.gf7 Kf7 35.Rh7 Ke8 36.Qe6 Kd8 37.Qd5 Ke8 38.Bh5 Rf7 39.Bf7 Ke7 40.Bg6 Kf8 41.Qf7) 32.Ra3+= Nd3 (32...Nc4 33.Be4 Qb2 34.Rd3+=) 33.Be2+/– (33.Ra5?? Qf2 34.Kh3 Qf1 35.Rg2 Nf2 36.Kh2 Qh1; 33.Bb7?? Qf2 34.Kh3 Qf1 35.Rg2 Nf2 36.Kh2 Qh1) 33...Ne1 34.Kh3 Qd2 35.h5 Kg7 36.f4 Rh8 (36...Qb4 37.Ra1+=) 37.Qh4 Qd4 (37...Qb4 38.Ra2=) 38.Qf6 (38.Ra5 gh5 39.Qf6 Kg8=) 38...Kg8= 39.Kg4 (39.Ra5 gh5 40.Qg5 Kf8=) 39...Rf8 (39...Rh5 40.Rh5 gh5 41.Kh5=) 40.Kg5 (40.h6!? Rh7 41.Ra5=) 40...Qc5 (40...Qb4 41.Re3 Rb8 42.h6=) 41.Rb3 (41.h6 Rh7 42.Ra2 b5–/+) 41...Qc2 (41...Qg1 42.Rh4+=) 42.Re3 (42.h6 Rh7 43.Ra3 b5–+) 42...Rh7 (42...b5 43.Rh4+=) 43.Kg4 (43.Ra3 gh5 44.Kh4 Rg7–/+) 43...a4 (43...Rh5 44.Rh5 gh5 45.Kh3–/+) 44.Kh3 (44.Kg5!?–/+) 0–1. Baer,Werner – Kuni,Richard, TT–07 ETC, 2003.

6.c4 dc4 7.Bc4 Nbd7 8.Bb2 a6 9.0-0=.

6.c4 dc4 7.Bc4 Nbd7 8.Bb2 Nb6 9.Bd3 c6 (9...a5 10.b5=) 10.Qc2 (10.e4 Nfd7+=) 10...a5 11.e4 Be7 (11...ab4 12.e5 ba3 13.Ba3 Ba3 14.Na3+=) 12.e5 Nfd5 13.ba5 Ra5 (13...Nd7 14.Bh7 Kh8 15.Be4+/–) 14.Bh7 Kh8 15.Be4 Nf4 (15...Ra4 16.0-0+/–) 16.0-0 Nbd5 17.Bc1 f5 18.ef6 gf6 19.Bd5 Nd5 20.Qg6 Qe8 21.Nh4 Rf7 22.Qh6 (22.Qh5 Kg8+/–) 22...Rh7+= 23.Qg6 (23.Ng6 Kg8 24.Ne7 Qe7 25.Qg6 Qg7+=) 23...Qg8= 24.g3 Bd7 (24...Rg7 25.Qh6 Qh7 26.Re1=) 25.Qg8 (25.Re1 b5=) 25...Kg8 26.Re1 Ra4 27.Nf3 c5 (27...b6 28.h4=) 28.dc5 Bc5 29.Nbd2 (29.Ra2 e5=) 29...b5 (29...e5 30.Rb1=) 30.Bb2 (30.Re4 Ra7=) 30...e5 31.Ne4 Be7 32.Nfd2 (32.Rad1 Be6=) 32...f5 33.Nc3 Nc3 34.Bc3 e4 35.Bb2 Kf7 36.Red1 (36.Kg2 Be6=) 36...Be6 37.Nf1 Bf6 (37...Bc5 38.Ne3=) 38.Bf6+= Kf6 39.Ne3 (39.Rdb1 Bc4 40.Ne3 Bd3+=) 39...Rha7 (39...Rg7 40.Kh1=) 40.Rab1+= R7a5 41.Rd6 Ra3 42.Rb6 The isolani on b5 becomes a target 42...Ra1 43.R6b5!? Rb5 A deflection (43...Rb1 44.Rb1 Ra8 45.h4+/–) 44.Ra1+/– Ke5 45.Ng2 (45.h4 Bf7+/–) 45...Bc4 (45...Rb2 46.h4+=) 46.Re1 (46.h4 Kf6+/–) 46...Rb2 47.h4 Bb5 (47...Bf7 48.Nf4 Rd2 49.Ra1+/–) 48.Nf4 (48.h5 Kf6 49.h6 Be2+/–) ½–½. Rohde,Friedhelm – Ehrlich,Stefan, 2005.

6.c4= dc4 7.Bc4 Nbd7 8.Bb2 c6 9.Bd3 a5 10.b5 cb5 11.Bb5 Nb6 Black prepares the advance a4 (11...b6 12.e4 Bc7 13.0-0=) 12.0-0 (12.Ne5 Nbd5=) 12...Bd7 13.Qb3 (13.Qe2 Rc8=) 13...a4+= 14.Qd3 Rc8 15.Nbd2 Bb5 16.Qb5 Qd7?? (16...Nfd5 17.e4 Nf4 18.Rfc1=) 17.Qd3?? (better is 17.Qb6 Nd5 18.Qa5+–) 17...Nfd5 18.Ng5 Do you see the mate threat? 18...f5 19.Rfc1 Rfd8 (19...Qe7 20.Ndf3=) 20.Ngf3 Bb8 (20...Kh8 21.Rab1=) 21.Rab1 Rc1 22.Rc1 Bd6 23.Qf1 Nf6 (23...Qe7 24.Qd3=) 24.Rc2 (24.Nc4 Nc4 25.Qc4 Nd5=) 24...Qe8 25.h3 (25.Qb1 Qg6=) 25...Nbd5 (25...Qg6 26.Nc4 f4 27.Qe2 Nc4 28.Rc4=) 26.Ne5 Rb8 (26...Qh5 27.Ndf3=) ½–½. Winiger,Albert – Woelfelschneider,Peter, TT–09 ETC, 2003.

6.c4= dc4 7.Bc4 Nbd7 8.Bb2 Qe7 9.Qc2 (9.0-0 e5=) 9...e5 (9...a5 10.b5=) 10.Nc3 e4 11.Nd2 Nb6 12.Be2 (12.Bb3 Bf5=) 12...Re8 (12...Bf5 13.0-0=) 13.h3 (13.0-0 a5=) 13...Nbd5 (13...a5!? 14.ba5 Ra5=) 14.Nde4+= Ne4 15.Nd5 Qg5 (15...Qh4 16.Bc4=) 16.Nc7 Qg2 17.Rf1 (17.Ne8?? Qh1 18.Bf1 Bh3–+) 17...Bc7 18.Qc7 Bh3 19.Rc1 (19.Qb7 Qh2 20.Bc4 Bf1 21.Qf7 Kh8 A) 22.Bf1?? Rf8 23.Qf8 Rf8–+; B) 22.Kf1?? Rf8 23.Ke2 Rf7 (23...Qf2?! 24.Qf2 Rf2 25.Kd3=) 24.Bf7 Qf2 25.Kd3 Qb2 26.Ke4 Qa1–+; C) 22.d5–/+) 19...Qg6 20.Qf4 Bf1 21.Bf1 Nf6 (21...Rac8 22.Rc8 Rc8 23.Bd3–/+) 22.Kd2 (22.Bc4 Rad8–/+) 22...h6 (22...a5 23.ba5 Ne4 24.Ke1–/+) 23.Bd3 Qg2 24.Rc7 Re6 Black launches an attack 25.Ke1 (25.Ke2 Rae8 26.Bc1 Rc6 27.Rc6 Qc6–+) 25...Rf8 26.Bf1 Qd5 27.Bc1 Rc6 (27...Re4 28.Qg3–/+) 28.Rc6–/+ Qc6 29.Bd2 Qa4 30.Qc7 b6 31.Bc1 Ne8 32.Qe7 Qb3 33.Qa7 (33.Bg2 Qc3 34.Kd1 Qd3 35.Ke1 Nf6–+) 33...Nd6 Plans Qc2 34.Qe7 Rc8 Threatening mate... how? 35.Bd2 Qb1 36.Ke2 Nc4 37.Bh3 (37.Be1 Nb2 38.Bh3 Rc1 39.Qe8 Kh7 40.Qf7 Re1 41.Kf3 Qd1 42.Kf4 Nd3 43.Ke4 Nf2 44.Qf2 Rg1 45.Qf5 Rg6=) 37...Rf8 (37...Rf8 38.Be1 Nb2–+) 0–1. Baer,Werner – Woelfelschneider,Peter, ETC, 2003.

6.c4 c6 7.c5 Bc7 8.Bb2 Ne4 (8...b6 9.Bd3=) 9.Nc3 (9.Bd3 Nd7=) 9...f5 (9...Nf6 10.Bd3+=) 10.Be2+= Nd7 11.0-0 Rf6 (11...Qe7 12.Rb1=) 12.b5 (12.Rc1 Rh6 13.h3 e5=) 12...Rh6= 13.h3 e5 (13...Qf6 14.Rc1+=) 14.Na2 (14.Ne5 Ne5 15.Ne4 Nf3 16.Bf3 fe4=) 14...f4 (14...ed4 15.ed4 Re6 16.Re1=) 15.Bd3 (15.ef4!? ef4 16.Nc3+=) 15...fe3+= 16.Be4 de4 17.Ne5 (17.Qb3 Kh8 18.Ne5 Be5 19.de5 ef2 20.Rf2 Nc5+=) 17...Ne5 18.de5 Qh4 19.Qb3 (worse is 19.fe3 Bh3 (19...cb5?! 20.Qd5 Be6 21.Qb7=) 20.Rf4 Qg3–/+) 19...Be6 20.Qe3 Rg6 (20...Rg6 21.bc6 Bh3+=). Baer,Werner – Woelfelschneider,Peter, TT–11 ETC, 2004.

6.Nbd2 a5 7.ba5 Ra5 8.Bd3=+.

6.Nbd2 b6 7.Bb2 Nbd7 (7...a5 8.Bc3 (8.ba5 Ra5 9.Bd3 Qe7 10.0-0 Ba3 11.Bc3=; 8.b5+= c6 9.bc6 Nc6 10.c4 Ba6 11.Rc1=) 8...Nc6 9.b5 Na7 10.Bd3 c6 11.bc6=; 7...c6 8.c4 (8.Bd3 a5 9.ba5 Ra5 10.c4 Nbd7 11.0-0=; 8.Be2 a5 9.ba5 Ra5 10.c4 Nbd7 11.Qb3=) 8...a5 9.ba5 Ra5 10.Bd3 Nbd7 11.0-0=) 8.c4= (8.Bd3 c5 9.bc5 bc5 10.dc5 Nc5 11.0-0+=; 8.Be2 c5 9.dc5 bc5 10.bc5 Nc5 11.0-0=) 8...c5 9.bc5 (9.cd5 ed5 10.dc5 bc5 11.bc5=) 9...bc5 10.cd5 ed5 11.dc5 Nc5 12.Be2 Rb8 13.Bd4 Qe7 14.Rb1 (14.0-0 Nfe4=) 14...Bf5+= 15.Rb8 Rb8 16.0-0 Nfe4 17.Qa1 Nd2 (17...Ne6 18.Be5=) 18.Nd2= Ne6 19.Be5 d4 20.ed4 Nd4 ½–½. dominick1952 (2205) – jka (1995), internet, 2006. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.d4 Bd6 5.e3 0-0 6.Nbd2)

6.Nbd2 Nbd7 7.c4 c6 (7...a5 8.c5 Be7 9.b5=) 8.c5 (8.Bd3 a5 9.c5 Bc7=) 8...Bc7 9.Bb2 Ne4 (9...b5 10.a4 ba4 11.Qa4+=) 10.Ne4 (10.Bd3 Ndf6=) 10...de4 11.Ne5 Ne5 (11...Qg5 12.Nd7 Bd7 13.Qc2=) 12.de5 Qg5 13.h4 (13.Qd4 Qg6+=) 13...Qg6 14.g3 (14.h5 Qf5 15.Rh4 Be5 16.Be5 Qe5=) 14...h5 (14...Rd8 15.Qc2+=) 15.a4 (15.g4 Rd8 16.Qe2 Qg4 17.Qg4 hg4+=) 15...Qf5 (15...Rd8 16.Qe2+=) 16.Bh3 Qg6 17.a5 (17.Bf1!?=) 17...Rd8+= 18.Qc2 f6 (18...Rd5 19.Rd1+=) 19.Bf1 White prepares a6 (19.ef6 gf6 20.Bg2 f5+=) 19...Rb8 (19...fe5 20.Rd1 Rd1 21.Qd1+=) 20.Be2 (20.ef6 gf6 21.Bg2 f5+=) 20...Kh7 (20...Be5 21.Be5 fe5 22.g4=) 21.ef6+= gf6 22.a6 (22.Rd1 e5+=) 22...ba6= 23.Qa4 a5 (23...Rd7!?=) 24.Qc6+/– Rd7 25.Ba6 Bg3?? (better is 25...Re7 26.b5 Ba6 27.Qa6 Rg7+/–) 26.Bc8+– (26.fg3 Qg3 27.Kf1 Qf3 28.Ke1 Qh1 29.Ke2 Qg2 30.Ke1 Qb2 31.Bc8 Qa1 32.Ke2 Qd1 33.Kf2 Rd2 34.Kg3 Qf3) 26...Bf2 27.Kf2 Deflection from d2 27...Rd2 Theme: Double Attack (27...Rg7 28.Rag1 Qf5 29.Ke1+–) 28.Ke1 Qg2 (28...Rc8 29.Qb7 Qg7 30.Qg7 Kg7 31.Rg1 Kf8 32.Kd2 ab4 33.Bf6+–) 29.Qc7 ½–½. Melia,Ken – Woelfelschneider,Peter, TT–05 TSC, 2003.

6.Bd3 a5 7.ba5 Ne4=+.

6.Bd3 b6 7.Nbd2 Nbd7 8.Bb2 c5 9.bc5 bc5 10.c4 cd4 11.Bd4 Nc5 (11...Ba6 12.0-0 (12.Qa4 Qc8 13.Ne5 Ne5 14.Be5 Nd7 15.Bd4=; 12.Qe2 Nc5 13.Bc5 Bc5 14.0-0 Qe7 15.cd5=) 12...Nc5 13.Bc5 Bc5 14.Nb3 Be7 15.c5=; 11...Bd6 12.cd5 ed5 13.Qc2 Qe7 14.0-0 Nc5 15.Be2=) 12.Be2 (12.Bb1 dc4 13.0-0 Qd5 14.Qc2 Qh5 15.Ba2=; 12.Bc2 Ba6 13.Ne5 Rc8 14.cd5 Qd5 15.Qf3=) 12...Bb7 (12...Ba6 13.0-0 Qa5 14.cd5 Nd5 15.Nc4=) 13.0-0 Rc8 14.Rb1 Bc6 (14...Qc7 15.Qc2=) ½–½. Marekt – AjedrezLevon, ChessWorld.net, 2004.

6.Be2 a5 7.b5=.

6.Be2 Nbd7 7.0-0 a5 8.b5 Nb6 (8...e5 9.de5 Ne5 10.Nbd2=) 9.a4 Ne4 10.Bb2 (10.Ba3 Na4 11.Bd6 Nac3 12.Bc7 Qc7+=) 10...Bd7 (10...c6 11.Bd3=) 11.Nbd2 c6 12.bc6 (12.Ne4!? de4 13.Nd2=) 12...Bc6+= 13.Bb5 (13.c4 Nd2 14.Nd2 dc4–/+) 13...Bb5 14.ab5 Nd2 15.Qd2 (15.Nd2 Qc7–/+) 15...Nc4 16.Qc1 (16.Qc3 a4–/+) 16...a4 (16...Qb6 17.Nd2 Qb5 18.Nc4 Qc4 19.Ba3 Ba3 20.Ra3–+) 17.Bc3 (17.Nd2 Nd2 18.Qd2 Qc7–/+) 17...Qc7 (17...Qd7 18.Qb1–+) 18.Bb2 (18.Qe1 Na3 19.Ra2 Qc4–+) 18...a3 (18...Rfc8 19.Ra2–+) 19.Bc3 a2 (better is 19...Rfc8 20.Ra2 Ne3 21.fe3 Qc3–+) 20.Nd2? (better is 20.Qe1–+) 20...Ne3! 21.fe3 Qc3 22.Nb3 (22.Qe1 Bb4 (22...Qc2?! 23.Nf3–+) 23.Nf3 Qe1 24.Rfe1 Bc3–+) 22...Rfc8 23.Rf2 (23.b6–+) 23...Qb3! 24.cb3 Exploits the pin 24...Rc1 Theme: Double Attack 25.Rc1 a1Q 26.Ra1 Ra1 27.Rf1 Bh2! 28.Kf2 (28.Kh2 Theme: Deflection from f1 28...Rf1) 28...Bg3 (28...Bg3 29.Ke2 Ra3–+) 0–1. katrica (1630) – pierre (2210), internet, 2007.

6.c4= 0-0 7.c5 Be7 8.Bd3=.

6.c4 c6 7.c5 Bc7 8.Be2 0-0 9.Nc3 e5 10.0-0 e4 11.Nd2 Re8 12.b5 Bb8 (12...Nf8 13.bc6 bc6 14.Qa4=+) 13.Rb1 (13.Bb2 Nf8+=) 13...Qc7 14.g3 Nf8 15.Re1 (15.Qa4 Ng6+=) 15...Bf5 (15...Bd7 16.f3 ef3 17.Nf3=) 16.bc6 (16.Qa4 Bd7+=) 16...bc6= 17.Qa4 (17.Rb2 Ng6=) 17...h5 18.Na2 Bg4 19.Bf1 (19.Ba6 Bc8=) 19...Ng6 (19...a5 20.Rb6 Bd7 21.Nb4+=) 20.Nb4+= Ne7 21.Na6 Qd7 (21...Qc8 22.Qb4 Bc7 23.Nc7 Qc7 24.Qb7=) 22.Qb3 (22.Rb4 Bh3=) 22...Bc7 23.h3 (23.Nc7 Qc7 24.Qb7 Qd8+=) 23...Be6 (23...Bf5 24.Nc7 Qc7 25.Qb7+=) 24.Nc7 Qc7 25.Qb7 Qa5 26.Bg2 (26.h4 Rad8=) 26…Nd7 (26...Nd7 27.Rb4 a6=). Hohlstein,Walter – Woelfelschneider,Peter, TT–07.12, 2003.

6.c4 c6 7.Nbd2 0-0 8.Bb2 Re8 9.Bd3 Nf8 (9...e5!? 10.de5 Ne5 11.Be5 Be5 12.Ne5 Re5=) 10.0-0+= Bd7 11.Qc2 Rc8 12.e4 Bb8 13.e5 Ng4 (13...Nh5 14.g3+/–) 14.h3 (14.c5 Nh6+/–) 14...Nh6 15.Nh2 (15.Bc1 Nf5+/–) 15...f5 (15...Nf5 16.c5+=) 16.f4 (16.Bc1 Ng6+/–) 16...Kh8 17.Ndf3 Nf7 (17...Ng6 18.g3+=) 18.Bc1 Bc7 19.Qf2 (19.c5 Ng6+/–) 19...a5 (19...dc4 20.Bc4 Ng6 21.Ng5 Ng5 22.fg5+=) 20.g4 (20.c5 Ra8+/–) 20...g6 (20...dc4 21.Bc4 Ra8 22.Bd2+=) 21.gf5 (21.c5 Ra8 22.Rb1 b6+=) 21...gf5 (21...ef5 22.Ng5 Qe7 23.c5=) 22.Ng5 Qe7 23.c5 Ng6 24.Kh1 Ra8 25.Be3 Rg8 26.Rg1 Ra7 27.Nhf3 Rga8 28.Nh4 (28.Nf7 Qf7 29.ba5 Ba5+=) 28...Nf8 (28...ab4 29.Ng6 hg6 30.Qh4 Kg7 31.Qh7 Kf8 32.Qg6+–) 29.Rab1 (29.Bd2 ab4 30.Bb4 Ba5 31.Ba5 Ra5 32.Nf7 Qf7+/–) 29...ab4+= 30.ab4 Bd8 31.Qg2 Ng5 32.fg5 Ng6 33.Nf3 Ra3 34.Bf1?? (better is 34.Rgd1+=) 34...Re3–+ 35.h4 (35.Qf2 Raa3 36.Nd2 f4–+) 35...Raa3 36.Nh2 Nh4 37.Qf2 Nf3 38.Nf3 Rf3 39.Qh4 Qg7 40.Qh6 (40.b5 cb5 41.Kh2 b6–+) 40...Be8 (better is 40...Rf4 41.Qg7 Kg7 42.Rg2–+) 41.Rb2 (41.Qe6 Qg6 42.Qg6 Bg6 43.Rg2–+) 41...Rg3 (41...Rg3 42.Qe6 Bd7–+) 0–1. Cortijo Dominguez,Daniel – Paul Tomillo,Jesus M, Valladolid CC Social Velasco, 1994. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 Bd6 5.d4 Nbd7)

6.Bd3 e5 7.0-0 e4–+.

7.Bc4+= a5 8.b5+=.

8.0-0 a5 9.b5 e5=.

8.0-0 Ne4=.

8.0-0 e5 9.Nc3 e4 10.Nd2 (10.Ng5!? Nb6 11.Be2=) 10...Nb6=+ 11.f3 ef3 12.Qf3 (worse 12.Rf3 Bg4–/+) 12...Re8 (12...a5 13.b5=) 13.h3= Nc4 14.Nc4 c6 15.Nd6 (15.Rd1 Nd5 16.Bb2 Bc7=+) 15...Qd6 16.Qf2 Rd8 17.Qf4 Qf4 18.Rf4 Be6 19.Bd2 Nd5 20.Nd5 cd5 21.Rff1 h5 22.Rac1 Rac8 23.h4 f6 24.a4 Bd7 25.Rc5 (25.a5 Bb5 26.Rc8 Rc8=+) 25...Ba4=+ 26.Ra5 (26.Ra1 b5=+) 26...b5 27.Ra7 Rc2 28.Rf2 Re8 29.Rb7 Re4 30.g3 Kh7 31.Re2 Re6 32.Kf2 Ra2 33.Bc1 (33.Ra7 Rc6 34.Be1 Rcc2 35.Rc2 Rc2 36.Kf1 Bb3=+) 33...Ra1 34.Bb2 (34.Rc7 Bb3=+) 34...Rh1 35.Rc7 (35.Kg2!? Rb1 36.Kf2=+) 35…Bd1–/+ (35...Bd1 36.Rd2 Bg4–/+) 0–1. Schulz,Hans_Juergen – Baer,Werner, TT–12.19 ETC, 2004.

8.Bb2 a5 9.b5=.

8.Bb2 Qe7 9.0-0 a5 10.b5 Rd8=.

8.Bb2 Qe7 9.Ne5 Nd5 10.0-0= f6 (10...Rd8 11.Qf3=) 11.Nd3 (11.Nd7 Bd7 12.Qf3 Bc6=) 11...f5 (11...N7b6 12.Bb5=) 12.Bb3 (12.Qf3!?+=) 12...Qh4= Threatening mate: Qxh2 13.h3 a5 (13...f4 14.e4 f3 15.ed5+–) 14.Nc3 N7f6 15.Nd5 (15.Qf3 c6=) 15...ed5 16.Bc3 b6 (16...Be6 17.Nc5 Bc8 18.Qf3=) 17.ba5 ba5 18.Qc2 (18.Nc5 Ba6 19.Na6 Ra6+/–) 18...Ba6 19.Rfc1? (19.Rfb1 a4 20.Ba2 Qe4+=) 19...a4 20.Ba2 Bd3 21.Qd3 Qe4 22.Qe4 (22.Bb1 Rab8=) 22...fe4+= (22...Ne4? 23.Bd5 Kh8 24.Ba8 Ra8 25.f3+–) 23.Bb4 Bb4 24.ab4 Rab8 (24...Ra7 25.Rc5 Rd8 26.Rac1=) 25.Rab1 (25.Rc7 Rb4 26.Rc5 Rd8+=) 25...Rfc8 26.b5 Kf7 27.Rb4 (27.Rc5 Ke6+=) 27...Ke7 (27...a3!?+=) 28.Rc6= a3 29.g4 (29.Rb3 Ra8+=) 29...h6 (29...Kd7 30.Rc5 Ke6 31.Ra4+=) 30.Ra6 (30.Ra4 g5=) 30...Rb6 (better is 30...Ra8!?–/+) 31.Ra3= Rcb8 Attacks the isolani on b5 32.Ra7 (32.Rc3 c6 33.Kg2+=) 32...Kd6+= 33.Bb3 c5 34.dc5 (34.Rba4 cd4 35.Rg7 Rb5=) 34...Kc5 Increases the pressure on b5 35.Rba4 (35.Rd4 Rb5 36.Ba4 R5b7 37.Ra5 Kd6 38.Ra6 Ke5+=) 35...Rb5 36.Ba2 R5b7 37.R7a5 Kd6 38.Kg2 g5 39.Ra3 (39.Ra6 Rb6+=) 39...Rb2 (39...Ke5 40.Bc4+=) 40.Ra7 R8b7 (40...R2b6 41.f3+=) 41.Ra8 (41.R7a6 Ke5+=) 41...Ke5 42.Rf8 (42.Kg3 R7b6+=) 42...Rb8 (42...R7b6 43.Rfa8–/+) 43.Rb8+= Rb8 44.Ra7 (44.Bb3 Nd7–/+) 44...Rb2–/+ ½–½. Winiger,Albert – Woelfelschneider,Peter, TT–06 TSC, 2003.

8.Bb2 Qe7 9.Ne5 Rd8 10.Nd7 Bd7 11.0-0+=.

8.Qc2 e5 9.Nbd2 Qe7 (9...a5 10.b5=) 10.Be2 (10.Ne4 Ne4 11.Qe4 Nf6+=) 10...Re8 (10...a5 11.Bb2+=) 11.de5 (11.Nc4 e4 12.Nfd2 Nd5=) 11...Ne5 12.Bb2 Bg4 (12...a5 13.Ne5 Be5 14.0-0=) 13.0-0 Rad8 (13...Rac8 14.Rad1=) 14.b5 (14.Rfd1 Nf3 15.Nf3 Ne4=) 14...c6 (14...Nd5 15.Rfd1=) 15.bc6 (15.Qa4 Bb8 16.Rad1 cb5 17.Bb5 Bf3 18.Nf3 Nf3 19.gf3 Rf8=) 15...Nc6 16.Bb5 (16.Bd3 h6=) 16...Rc8+= 17.Qa4 Bf3 (17...Bd7 18.Bc6 Bc6 19.Qa7=) 18.Nf3 a6 19.Be2 (19.Bd3 Ne5 20.Be5 Be5 21.Ne5 Qe5=) 19...Ne4 20.Rad1 Rc7 21.Bd3 Nc5 22.Qg4 Threatening mate... how? 22...Be5 (22...Ne5 23.Ne5 Be5 24.Be5 Qe5 25.Qh4 Nd3 26.Rd3=) 23.Ne5 Ne5 24.Be5 (24.Qg3 Qe6+=) 24...Qe5= 25.Qh4 Nd3 (25...h6 26.Rd2=) 26.Rd3 Rc3 27.Rd8 (27.Rc3 Qc3 28.a4 Qd2=) 27...Ra3 28.Rfd1 (28.Qd4 Qe6 29.Qd5=) 28...b6 (better is 28...b5!?+=) 29.h3 f6 30.Qc4 (30.Qb4 Ra5 31.Qb6 Rd8 32.Qd8 Kf7 33.Qd7 Kf8 34.Qc8 Kf7 35.Qc4 Kf8 36.Qb4 Kf7+=) 30...Kf8 31.Re8 Ke8? (better is 31...Qe8 32.Qb4 Qe7 33.Qb6 Kf7+=) 32.Qg8+– (32.Qg8 Ke7 33.Qg7 Ke8 34.Qg8 Ke7 35.Qd8 Kf7 36.Rd7 Ke6 37.Qe8 Kf5 38.g4 Ke4 39.Qa8 Qd5 40.Qd5) 1–0. Winiger,Albert – Schulz,Hans_Juergen, TT–07 ETC, 2003.

6.Nc3 A) 6...Bb7 7.e3 (7.Nb5 Be7 8.Bf4 Na6 9.e3 c6 10.Nc3 Nb4 11.Ne5 Na6 12.Bd3 Nc7+=; 7.Bf6 Qf6 8.Nb5 0-0 9.Nd6 cd6 10.e3 Rc8 11.Bd3 e5 12.Nd2 ed4=) 7...0-0 (7...a5 8.Bf6 Qf6 9.Nb5 0-0 10.Nd6 cd6 11.ba5 Ra5 12.Rb1 Qd8=; 7...a6 8.Bd3 0-0 9.0-0 h6 10.Bh4 Nbd7 11.e4 g5 12.e5 gh4=) 8.Bd3 a6 9.0-0 Nbd7 10.e4 de4 11.Ne4 Be7 12.Qe1 Re8=; B) 6...Be7 B1) 7.Ne5 h6 (7...0-0 8.e3 c5 9.Rb1 Ba6 10.Ba6 Na6 11.dc5 bc5 12.Nc6 Qd7+=; 7...c5 8.Rb1 0-0 9.e3 Ba6 10.Ba6 Na6 11.Nc6 Qc7 12.Ne7 Qe7+=) 8.Bf6 Bf6 9.e3 0-0 10.Qh5 c5 11.Bd3 Nd7 12.Nb5 Be5+=; B2) 7.Bf6 Bf6 8.e4 0-0 9.Bd3 c5 10.e5 Be7 11.dc5 bc5 12.bc5 Nc6=; B3) 7.e3 c5 (7...0-0 8.Bd3 c5 9.bc5 bc5 10.dc5 Bc5 11.0-0 Nbd7 12.Qd2 h6=; 7...h6 8.Bf4 c5 9.dc5 bc5 10.Rb1 0-0 11.bc5 Qa5 12.Qd2 Nc6+=) 8.dc5 bc5 9.bc5 0-0 10.Bd3 Bc5 11.0-0 Nbd7 12.Qd2 h6=; C) 6...c5 7.bc5 (7.Bf6 Qf6 8.Nb5 Qd8 9.Nd6 Qd6 10.bc5 bc5 11.e3 0-0 12.c4 dc4=; 7.dc5 bc5 8.Bf6 Qf6 9.Nb5 Qd8 10.c4 Ba6 11.Nd6 Qd6 12.Rc1 cb4=) 7...bc5 8.e4 Qa5 9.Bd2 Bf4 10.e5 Bd2 11.Qd2 Nfd7 12.Nb5 Qd2+/–; D) 6...a5 D1) 7.Bf6 gf6 (7...Qf6 8.e4 Qd8 9.b5 Qe7 10.Qc1 de4 11.Ne4 Bb7 12.Bd3 0-0=) 8.b5 Qe7 9.Qd3 a4 10.Nb1 c5 11.dc5 bc5 12.Ra2 c4+=; D2) 7.e3 ab4 8.ab4 Ra1 9.Qa1 Bb4 10.Bf6 gf6 11.Bd3 c5 12.0-0 Nc6+=; D3) 7.b5 Bb7 (7...h6 8.Bf6 Qf6 9.e4 Qe7 10.Qc1 de4 11.Ne4 Bb7 12.Bd3 0-0=; 7...Qe7 8.Bf6 Qf6 9.e4 Qe7 10.Qc1 de4 11.Ne4 0-0 12.Bd3 Bb7=) 8.e3 Qe7 9.a4 Bb4 10.Qd2 0-0 11.Bd3 c6 12.bc6 Nc6=.

6.c4 A) 6...0-0 A1) 7.e3 a5 (7...h6 8.Bh4 a5 9.b5 c5 10.dc5 bc5 11.Nc3 Bb7 12.Rb1 Nbd7=; 7...dc4 8.Bc4 Bb7 9.0-0 Qe7 10.Qe2 h6 11.Bh4 Rd8 12.e4 g5=) 8.c5 Be7 9.Nc3 Ne4 10.Be7 Qe7 11.Ne4 de4 12.Nd2 Bb7=; A2) 7.c5 Be7 (7...bc5 8.bc5 Be7 9.Nc3 Bd7 10.Rb1 Ne4 11.Be7 Qe7 12.Qd3 Nc3+=) 8.Nc3 h6 9.Bf6 Bf6 10.e3 bc5 11.bc5 Nd7 12.Rc1 c6=; A3) 7.Nc3 Bb7 (7...a5 8.b5 Bb7 9.cd5 ed5 10.e3 h6 11.Bh4 Nbd7 12.Bd3 Qe7+=; 7...dc4 8.e4 Be7 9.Bc4 Bb7 10.Qc2 a5 11.b5 c6 12.e5 Nfd7+=) 8.c5 Be7 9.e3 a5 10.Bd3 Ne4 11.Be7 Qe7 12.Qc1 ab4=; B) 6...a5 B1) 7.b5 h6 (7...0-0 8.Nc3 Bb7 9.cd5 ed5 10.e3 h6 11.Bh4 Nbd7 12.Bd3 c5+=; 7...c6 8.Nc3 Be7 9.e3 0-0 10.Ne5 c5 11.dc5 bc5 12.Bd3 Bb7+=) 8.Bf6 Qf6 9.cd5 ed5 10.Nc3 Be6 11.Qb3 Qf5 12.h3 Nd7=; B2) 7.Qa4 Qd7 (7...c6 8.Nc3 0-0 9.b5 Bb7 10.e3 h6 11.Bh4 c5 12.dc5 bc5+=; 7...Bd7 8.b5 h6 9.Bf6 Qf6 10.Nc3 c6 11.e4 Qg6 12.cd5 ed5+=) 8.Qd7 Bd7 9.Bf6 gf6 10.c5 Be7 11.cb6 cb6 12.ba5 Ra5=; B3) 7.c5 Be7 (7...Bf8 8.Nc3 ab4 9.ab4 Ra1 10.Qa1 Be7 11.e3 c6 12.Bd3 0-0+=) 8.Nc3 h6 9.Bf6 Bf6 10.e3 0-0 11.Bd3 ab4 12.ab4 Ra1+=; C) 6...h6 7.Bf6 Qf6 8.Nbd2 c5 9.bc5 bc5 10.dc5 Bc5 11.cd5 ed5 12.Nb3 Nd7=.

6.Nbd2 a5 A) 7.b5 h6 (7...Bb7 8.e3 Qe7 9.a4 h6 10.Bh4 Nbd7 11.c4 e5 12.cd5 e4=; 7...0-0 8.e4 de4 9.Ne4 Be7 10.Bd3 Bb7 11.Qe2 Nbd7 12.0-0 c5=) 8.Bf6 Qf6 9.e4 Qe7 10.Qc1 e5 11.ed5 ed4 12.Be2 Bb7=; B) 7.ba5 Ra5 8.e4 de4 9.Ne4 Ba3 10.Nf6 gf6 11.Bd2 Ra7 12.Bd3 Bb7=; C) 7.Bf6 Qf6 (7...gf6 8.b5 Qe7 9.Qc1 Bd7 10.e4 c6 11.bc6 Nc6 12.Bb5 e5+=) 8.e4 Bf4 9.e5 Qe7 10.b5 0-0 11.Bd3 c5 12.bc6 Ba6=.

6.Nbd2 Bb7 A) 7.e3 h6 (7...a5 8.b5 Qe7 9.a4 h6 10.Bh4 Nbd7 11.Bd3 g5 12.Bg3 Bg3=; 7...0-0 8.Bd3 a5 9.b5 h6 10.Bh4 Qe7 11.Ne5 Ba3 12.Bf6 gf6+/– 1.34) 8.Bh4 a5 9.b5 Qe7 10.a4 Nbd7 11.c4 e5 12.cd5 e4+=; B) 7.Nb3 h6 (7...Ba6 8.Nbd2 0-0 9.e4 Bf1 10.Rf1 de4 11.Ne4 Be7 12.Bf6 Bf6=; 7...0-0 8.e3 Nbd7 9.Bb5 c6 10.Bd3 Qc7 11.Bf6 Nf6 12.0-0 Rfd8=) 8.Bh4 Ba6 9.Bg3 Bg3 10.hg3 Nbd7 11.a4 c6 12.a5 Qe7=; C) 7.c4 dc4 (7...a5 8.c5 Be7 9.e3 0-0 10.Bd3 bc5 11.bc5 Ba6 12.Ba6 Na6+=; 7...0-0 8.c5 Be7 9.e3 a5 10.Bd3 bc5 11.bc5 Ba6 12.Ba6 Na6+=) 8.Nc4 Bf3 9.ef3 Be7 10.Ne5 0-0 11.Bd3 c6 12.Be4 Qe8=.

6.Nbd2 c5 7.e4 (7.bc5 bc5 (7...Be7 8.cb6 ab6 9.a4 Ba6 10.Bf6 Bf6 11.e4 Bf1 12.Rf1 0-0+=) 8.e4 Be7 9.e5 Nfd7 10.Be7 Qe7 11.Bd3 0-0 12.dc5 Nc6=) 7...h6 (7...Be7 8.e5 Nfd7 9.Be7 Qe7 10.c3 c4 11.Be2 0-0 12.0-0 f6=) 8.Bb5 (8.Bf6 gf6 9.bc5 bc5 10.ed5 ed5 11.Bb5 Bd7 12.Bd7 Qd7+/–) 8...Bd7 9.Bd7 (9.Bf6 gf6 10.Bd7 Nd7 11.bc5 bc5 12.ed5 ed5+/–) 9...Nbd7 (9...Qd7 10.Bf6 gf6 11.bc5 bc5 12.ed5 ed5+/–) 10.Bf6 gf6 (10...Qf6 11.bc5 Bf4 12.cb6 ab6+=) 11.c3 (11.bc5 bc5 12.ed5 ed5+/–) 11...de4 (11...Rg8 12.dc5 bc5+=) 12.Ne4 Be7 13.d5 f5 14.Ng3 Nf6 15.de6 Qd1 16.Rd1 fe6 17.0-0 Rd8 18.Rd8 Bd8 19.Re1 Kf7 20.Ne5 Kg7 21.Nc6 Kf7 22.Na7 Nd5 23.c4 Nf4 24.Rd1 cb4 25.ab4 Bf6 26.Nb5 Kg6 27.Kf1 Rc8 28.Nd6 Rc6 29.b5 Rc7 30.Ne2 Ne2 31.Ke2 Be5 32.g3 f4 33.Rd3 Rc5 34.g4 f3 35.Kf3 (35.Rf3? Bd6 36.Kd3 Bh2–+) 35...Bh2 36.Ke3 h5 37.gh5 Kh5 38.f3 Kh4 39.Rd4 Kh3 40.Kd3?? (better is 40.Rd1+–) 40...Be5= 41.Re4 Bd6 42.Re6 Bc7 43.Rg6 Rf5 44.Ke3 Rf7 45.Rg8 Rf4 46.c5 Rb4 47.cb6 Bb6 48.Kd3 Rb5 49.Rg6 Bc7 50.Ke4 Bg3 51.Rf6 Re5 52.Kd4 Re1 53.Kd3 Kg2 54.f4 Kf3 55.f5 Be5 56.Rf7 Rd1 57.Kc4 Ke4 58.Rf8 Rc1 59.Kb5 Kd5 60.Rd8 Bd6 61.f6 Rb1 62.Ka5 Rf1 63.Rh8 Rf6 64.Kb5 Rf1 65.Rh5 Be5 66.Kb6 Rb1 67.Ka5 Kd4 68.Ka6 Bd6 69.Rb5 Rc1 70.Rb3 Kc4 71.Rb2 Bc5 72.Kb7 Bd4 73.Ra2 Kb5 74.Rd2 Rc4 75.Rd1 Ra4 76.Rb1 Kc5 77.Rh1 Be5 78.Rc1 Kd6 79.Rd1 Bd4 80.Rh1 Ra7 81.Kb8 Re7 82.Rh6 Kc5 83.Kc8 Be5 84.Rg6 Bd6 85.Rg1 Kc6 86.Rc1 Bc5 87.Kd8?? (87.Rd1 Ra7 88.Rb1 Ra8 89.Rb8 Ra1–/+) 87...Rf7 (better is 87...Re2–+) 88.Re1–/+ Rh7 89.Ke8 Bd6 90.Rc1 Kd5 91.Re1 Be5 92.Kd8?? (better is 92.Re2–/+) 92...Ke6–+ 93.Kc8 Rc7 94.Kd8 Rb7 (better is 94...Rc2–+) 95.Rc1–/+ ½–½. Akhiyarov,Viktor (1875) – Bazhanov,Sergey, Izhevsk RUS, Udmurtia Ch, 2011. (=1.d4 d5 2.Nf3 Nf6 3.b4 e6 4.a3 Bd6)

6.e3 A) 6...0-0 A1) 7.c4 h6 (7...a5 8.b5 h6 9.Bh4 c6 10.Nc3 Be7 11.Ne5 cb5 12.Nb5 Bb7+=; 7...Ba6 8.Nbd2 c6 9.e4 Be7 10.e5 Nfd7 11.Be7 Qe7 12.Qc2 dc4+=) 8.Bh4 Ba6 9.Ne5 c5 10.b5 Bb7 11.Qf3 Be7 12.Bf6 Bf6=; A2) 7.Be2 c5 (7...h6 8.Bh4 c5 9.dc5 bc5 10.bc5 Bc5 11.c4 Nc6 12.Nbd2 dc4=; 7...c6 8.c4 h6 9.Bf6 Qf6 10.Nbd2 c5 11.bc5 bc5 12.dc5 Bc5+=) 8.dc5 bc5 9.bc5 Bc5 10.0-0 Ba6 11.Bd3 Bd6 12.Nbd2 Bd3=; A3) 7.Bd3 h6 (7...c6 8.0-0 a5 9.b5 h6 10.Bh4 cb5 11.Bb5 Ba6 12.Nc3 Qe7=; 7...a5 8.e4 de4 9.Be4 c6 10.b5 Bb7 11.Qd3 h6 12.Bf6 Qf6=) 8.Bh4 c5 9.dc5 bc5 10.bc5 Bc5 11.Qd2 Nbd7 12.0-0 Qe7=; B) 6...a5 B1) 7.Nbd2 c6 (7...0-0 8.b5 h6 9.Bh4 c6 10.e4 g5 11.Bg5 hg5 12.e5 Be7=; 7...ab4 8.ab4 Ra1 9.Qa1 h6 10.Bf6 Qf6 11.c4 c6 12.Qa7 Qd8+=) 8.b5 0-0 9.e4 de4 10.Ne4 Be7 11.Nf6 Bf6 12.Bf6 Qf6=; B2) 7.ba5 Ra5 8.Ne5 c5 9.Qf3 h6 10.Bf4 Qc7 11.Nd2 Ba6 12.c4 cd4=; B3) 7.b5 0-0 (7...h6 8.Bh4 c6 9.c4 0-0 10.Nc3 Be7 11.Ne5 cb5 12.Nb5 Bb7+=; 7...c5 8.bc6 Nc6 9.c4 dc4 10.Bc4 0-0 11.Nbd2 Be7 12.Rb1 Bd7+=) 8.Ne5 Nbd7 9.Nd7 Bd7 10.Qf3 c6 11.bc6 Bc6 12.Bd3 Rc8=; C) 6...h6 C1) 7.Bh4 c5 (7...a5 8.b5 0-0 9.c4 c5 10.dc5 bc5 11.Nc3 Bb7 12.Rb1 Nbd7=; 7...0-0 8.Bd3 c5 9.dc5 bc5 10.bc5 Bc5 11.0-0 Nc6 12.Nbd2 Rb8=) 8.dc5 bc5 9.bc5 Bc5 10.Bb5 Nbd7 11.0-0 Rb8 12.c4 0-0=; C2) 7.Bf4 Bf4 8.ef4 0-0 9.Ne5 c5 10.dc5 bc5 11.bc5 Qa5 12.Nd2 Qc5+=; C3) 7.Bf6 Qf6 8.Nc3 0-0 9.e4 de4 10.Ne4 Qf4 11.Bd3 Bb7 12.g3 Qf5=; D) 6...c6 D1) 7.c4 h6 (7...a5 8.b5 0-0 9.Nc3 dc4 10.Bc4 Bb7 11.Ne5 c5 12.0-0 h6+=; 7...0-0 8.c5 Bc7 9.Ne5 h6 10.Bh4 bc5 11.bc5 Ba5 12.Ke2 Ba6=) 8.Bf6 Qf6 9.Nbd2 0-0 10.e4 e5 11.c5 Bc7 12.ed5 ed4+=; D2) 7.Ne5 Qc7 (7...a5 8.b5 Qc7 9.Bf6 gf6 10.Nf3 Rg8 11.Qd3 f5 12.Nc3 c5=; 7...0-0 8.Qf3 h6 9.Bf6 Qf6 10.Qf6 gf6 11.Ng4 Kg7 12.h3 f5=) 8.Bf4 a5 9.ba5 Ra5 10.c4 0-0 11.Qf3 c5 12.Nd2 cd4+=; D3) 7.Bd3 h6 (7...0-0 8.0-0 a5 9.b5 h6 10.Bh4 cb5 11.Bb5 Ba6 12.Nc3 Qe7=; 7...a5 8.b5 0-0 9.Nc3 c5 10.dc5 bc5 11.0-0 Bb7 12.a4 e5=) 8.Bf4 Bf4 9.ef4 a5 10.b5 cb5 11.Bb5 Bd7 12.Bd3 0-0=.

5.Nc3 b6 6.h3 c5 7.dc5 bc5 8.bc5 1–0. capacuba (2310) – lkbo, net–chess.com, 2013. (=1.d4 d5 2.Nf3 Nf6 3.a3 e6 4.b4)

5.e3 Bd6 6.Bb2 (6.c4 dc4 7.Bc4 0-0=) 6...Ne4 (6...0-0 7.c4=) 7.Nbd2 Ndf6 (7...a5 8.c4=) 8.Ne4 Ne4 9.Bd3 0-0 (9...a5 10.c4=) 10.Nd2 (10.c4 a5+=) 10...f5 (10...Qg5 11.0-0=) 11.c4 Qh4 12.g3 (12.Qe2 Nd2 (12...Bh2? 13.Be4 fe4 14.Nf1+–) 13.Qd2 dc4= (worse is 13...Bh2 14.g3 Qh3 15.Bf1+–)) 12...Qh6 13.Ne4 (13.0-0 Bd7=) 13...fe4+= 14.Be2 Qh3 15.Bf1 (15.Qb3 c6–/+) 15...Qf5–/+ 16.Qd2 Bd7 17.c5 Be7 18.Bg2 (18.Rg1 a6–/+) 18...Bb5 19.Bf1 (19.h4 a5–/+) 19...Bf1 20.Kf1 (20.Rf1 Qh3–/+) 20...c6 (20...Qh3 21.Kg1–+) 21.Rg1 Qh3 (21...Qh5 22.Rg2–/+) 22.Rg2 Rf3 23.Bc3 Raf8 24.Re1 a6 (24...b6 25.Kg1–/+) 25.a4 h5 (25...R8f7 26.Kg1–/+) 26.b5 (26.Kg1 Qg4–/+) 26...h4 (26...Rf2 27.Qf2 Rf2 28.Kf2 ab5 29.ab5 cb5 30.Kg1–/+) 27.Kg1 Qf5 28.gh4 Bh4 29.Rf1 (29.Re2 ab5 30.ab5 cb5–/+) 29...ab5 30.ab5 cb5 31.Qe2 Rf7 32.Be1 e5 33.Bc3 (33.Qb5 ed4 34.ed4 e3–+) 33...ed4 34.Bd4 b4 35.Qb2 g5 36.Qe2 (36.Qa2 Kh7–/+) 36...g4 (36...Kf8 37.Qb2–+) 37.Qb2 (37.Qa2 Kh7 38.Qb2–/+) 37...Rh7 (better is 37...Kf8!?–+) 38.Qb4 Bf2?? (better is 38...Rf7 39.Qd2 Kf8+=) 39.Rff2+– Rf2?? (39...Rf7 40.Rf3 ef3+–) 40.Rf2 Qf2 41.Kf2 Rh2 (41...Rf7 42.Kg3 Rd7 43.Qb6 Rg7 44.Qe6 Kf8 45.Qd6 Kg8 46.Qe5 Kf7 47.Qg7 Ke6 48.Qf6 Kd7 49.Qf7 Kd8 50.Bf6 Kc8 51.Qe8 Kc7 52.Be5) 42.Kg3 Rh7 43.Kg4 1–0. Popp,Tony – Pivirotto,Filiberto, IECC, 2003. (=1.a3 d5 2.d4 e6 3.b4 Nf6 4.Nf3 Nbd7)

5.e3 Be7 6.Bb2 0-0 7.Bd3 h6 8.0-0 b6 9.Ne5 Bb7 10.Nd2 Ne5 11.de5 Nd7 12.c4 dc4 13.Nc4+= c5 14.bc5 Nc5=+ 15.Bc2 Qc7 16.Nd2 Rfd8 17.Qg4?? Rd2–+ (17...Rd2 18.Rac1 Rad8–+) 0–1. zoltan (2385) – johnb (2245), net–chess.com, 2008.

5.Ne5 Bd6 6.f4 Ne4 7.h4? (7.Qd3 a5 8.b5 Nb6+=) 7...Ng3 (better is 7...Ne5 8.fe5 Be7–+) 8.Rh3–/+ Nf1 9.Kf1 b6 10.e3 Ne5 (10...c5 11.Bd2–/+) 11.de5 Be7 12.h5 h6 13.Qg4 Rg8 14.Bb2 Qd7 15.Qe2 a5 16.b5 Bb7 17.Nc3 0-0-0 18.Na4 f6 19.Bd4 Kb8 20.Rc1 fe5 21.fe5 (21.Be5 Bf6+=) 21...Rgf8 22.Kg1 Rf5 23.g4 (23.Rd1 Qe8–/+ (23...Ba3? 24.e4 Rf4 25.Ra3+–)) 23...Rf7 (23...Ba3 24.Ra1 Rg5 25.Ra3+/–) 24.Qd3 Rdf8 25.Rh2 Bd8 26.c3 Rf3 27.Qe2 Qe7 28.Ra1 Qg5 29.Qg2 Re3 30.Rh3 (30.Kh1 Re4–+) 30...Re4 (better is 30...Rh3!? 31.Qh3 Rf4 32.Kh2 Rg4 33.Rf1–+) 31.Rg3 (31.Kh1–+) 31...Rff4 32.Be3 (32.Rd1 Rg4 33.Rdd3 Qh5 34.Rg4 Rg4 35.Rg3 Rg3 36.Qg3 Qd1 37.Kf2 Qa4 38.Qg7 Bh4 39.Kg2–+) 32...Re3! 33.Re3 Rg4 34.Re2 (34.Qg4 Qg4 35.Kf1 Bh4–+) 34...Rg2 (better is 34...d4 35.Qg4 Qg4 36.Kf1 Qh3 37.Ke1–+) 35.Rg2 Qe5 36.Rf1 Bf6 37.Rf3 d4 (37...d4 38.Nb6 cb6 39.Rf6 Qf6 40.cd4 Qd4 41.Kh2 Qd5–+) 0–1. Cherdantsev,Vladimir (1960) – Kakadzhanov,Timur, Vladivostok op, 2007. (=1.d4 d5 2.Nf3 Nf6 3.b4 e6 4.a3 Nbd7)

6.c4 e5 7.c5 Be7 8.de5+=.

7.Bb2 0-0 8.e3 Ne4 9.Bd3 Nd2 10.Qd2 dc4 11.Bc4 Qc7 12.e4 Nb6 13.Bb3 f5 14.Qe2 fe4 15.Qe4 Rf4 16.Qd3 (worse is 16.Be6 Kf8 17.Qh7 Be6–+) 16...Nd5 17.Bc2 g6 18.g3 (18.0-0 a5 19.ba5 Ra5=) 18...Rf5 (18...Rf8 19.Ne5+=) 19.Ne5 Be5 (19...a5 20.b5=) 20.de5 Bd7 (20...Re5 21.Be5 Qe5 22.Kd2=) 21.Qe2 Rf7 22.h4 Qb6 Attacking the backward pawn on f2 (22...a5 23.h5 g5 24.Qg4 ab4 25.ab4 Ra1 26.Ba1+=) 23.h5 (23.Qd2 a5 24.h5 gh5+/–) 23...Nb4 (23...Raf8 24.Rh2 (24.hg6? Rf2 25.Qe4 Qe3 26.Qe3 Ne3 27.gh7 Kh8–+) 24...g5 25.Qd2+=) 24.hg6 (24.Be4 Raf8 25.f4 g5 26.ab4 Qb4 27.Kd1 Qb3 28.Kc1 Qg3 29.fg5 Qg5 30.Kb1 a6+–) 24...Nc2 25.Qc2 The mate threat is gxf7 25...hg6 26.Qg6 The passed pawn on g3 will become decisive later 26...Rg7 27.Qc2 Qa5 28.Kf1 (28.Bc3 Qd5 29.Rh4 Rf8+/–) 28...Qd5 29.Rh6 c5 30.Qd1 (30.a4 Rf8+=) 30...Bc6 31.Qd5 Bd5 32.Ke2 b5 33.Rc1 Rc8 34.Bc3 Rc6 35.Rb1 Ra6 36.Kd2 Rb6 (36...Rd7!? 37.Ra1 b4–/+) 37.Ba5 Rbb7 38.Bd8? (38.Rc1 Bc4+=) 38...Be4 (better is 38...Rbd7 39.Bf6 Be4 40.Kc1 Bb1 41.Bg7 Kg7 (41...Rg7?! 42.Kb1 Kf7 43.Kb2=) 42.Re6 Be4–+) 39.Rc1+= Rgd7 40.Ke3 Bf5 41.g4 Rd3 (41...Bg4 42.Bf6 Bf5 43.Rh8 Kf7 44.Rg1+–) 42.Ke2 Be4 43.Bg5 (43.f3!? Rf3 44.Rc5 Ra3 45.Re6=) 43...c4–/+ 44.Re6 Bf3 45.Kf1 Bg4 (45...Ra3 46.Rg6 Rg7 47.Rg7 Kg7 48.Bf6 Kf7 49.g5–/+) 46.Rg6 Rg7 47.Rg7 Kg7 48.Re1 (48.Be7 Kf7 49.Bd6 Ke6–/+) 48...Kg6 (48...Ra3 49.e6 Kf8 50.Re5–+) 49.Bc1 Rd1 (49...Bh3!? 50.Ke2 a5–/+) 50.Rd1+= Bd1 51.Ke1 Bg4 ½–½. Hepting,H – Mischustov,M, Bayern, 2000.

7.Bb2 0-0 8.e3 Ne4 9.Bd3 f5 10.Rc1 Qf6 11.Qc2 Rb8 12.0-0 (worse is 12.Ne4 fe4 13.Be4 de4 14.Qe4 Ra8–/+) 12...b5 13.cd5 (worse is 13.Ne4 fe4 14.Be4 de4 15.Qe4 bc4 16.Rc4 Ba6 17.Rc6 Bh2 18.Nh2 Bf1–/+) 13...cd5 14.Nb3 (14.Ne4? fe4 15.Be4 de4 16.Qe4 Bb7–+) 14...a6 15.Nc5 Nb6 16.Ne5 (16.Ne4? de4 17.Qc6 Qe7 18.Be4 fe4–+) 16...Qh6 17.f4 Nc4 18.Rf3 (worse is 18.Be4 Ne3 (18...fe4?! 19.Qc3=) 19.Qb3 Nf1 20.Ne6 Nd2–/+ (20...de4?? 21.Nf8 Be6 22.Ne6 Qh2 23.Kf1+–; 20...fe4 21.Nf8 Qh2 22.Kf1 Kf8 23.Qd5 Qf4 24.Kg1 Qe3 25.Kf1 Be5 26.Qe5 Qd3 27.Kg1 Qe3 28.Kf1 Qd3 29.Kg1 Qe3 30.Kf1=; 20...Qe6?? 21.Bd5 Be5 22.Be6 Kh8 23.Rc8 Rbc8 24.Bc8+–; 20...Qh2 21.Kf1 fe4 22.Nf8 Kf8 23.Qd5 Qf4 24.Kg1 Qe3 25.Kf1 Be5 26.Qe5 Qd3 27.Kg1 Qe3 28.Kf1 Qd3 29.Kg1 Qe3 30.Kf1=)) 18...Be5 19.de5 Nc5 20.bc5 Bb7 21.Rh3 Qg6 22.Qb3 Nb2 23.Qb2 Rfc8 24.Qb4 Bc6 25.Qd2 Qf7 26.g4 g6 (worse is 26...fg4 27.Rh7 Rf8 28.Qf2+–) 27.Rg3 fg4 28.Be2 Rc7 29.Bg4 Rbc8 30.Qd4 Bd7 31.Rg2 Qe7 The isolani on c5 becomes a target 32.Rgc2 a5 33.Be2 Kf7 34.Bf1 Be8 35.Bd3=. Baer,Werner (1900) – Hasek,Frantisek (1765), TT–15 ETC, 2005.

7.Bb2 0-0 8.e3 Qe7 9.Ne5 Ne4 (9...Bc7 10.Bd3=) 10.Ne4+= de4 11.c5 Bc7 12.f4 (12.Qc2 f5+=) 12...f6 (12...ef3!? 13.Nf3 e5+=) 13.Nd7+= Bd7 14.Qc2 e5 15.Bc4 Kh8 16.d5 (16.fe5 fe5 17.d5 cd5 18.Bd5 Rab8+=) 16...cd5 (worse is 16...ef4 17.d6 Bd6 18.cd6 Qd6 19.Rd1+– (19.Qe4?! Rfe8 20.Qd4 Qd4 21.Bd4 fe3+=)) 17.Bd5 ef4 18.Qe4 (worse is 18.Be4 Rfe8 (18...fe3?! 19.Bb7 Rad8 20.Qe4=) 19.0-0-0 Ba4 20.Qa4 Qe4–/+; 18.Bb7?! A) worse is 18...fe3 19.Ba8 (19.Be4?! Ba4 20.Qc4 Rad8+=; 19.Qe4?! Qe4 20.Be4 Rad8=) 19...Ra8 20.Qe2+/–; B) 18...Rae8=) 18...Qe4 19.Be4 Rab8 20.ef4 Rfe8 21.0-0-0 Bf4 22.Kb1 Bg4 ½–½. Schulz,Hans_Juergen – Milde,Lars, ETC, 2004.

7.e3 0-0 8.Bb2 a5 9.c5 Bb8 10.Qa4+=.

7.e3 0-0 8.Bb2 a5 9.c5 Bc7 10.b5=.

7.e3 0-0 8.Bb2 b6 9.Bd3=.

7.e3 0-0 8.Bb2 Bc7 9.Bd3=.

7.e3 0-0 8.Bb2 Ne4 9.c5 Bc7=.

7.e3 0-0 8.Bb2 Ne4 9.Bd3 Nd2 10.Nd2 Qh4 11.Nf3+=.

7.e3 0-0 8.Bb2 Ne4 9.Bd3 f5 10.0-0 Qf6 11.Rc1 (11.Qc2 Qg6=) 11...b6 (11...Qg6 12.Qe2+=) 12.cd5 (12.Qc2 Ba6=) 12...cd5 Opening the c–file gets White a lot of play (12...ed5 13.Ne5 Be5 14.de5=) 13.Bb5 a6 (13...Nb8 14.Ne5=) 14.Rc8 ab5 15.Rc6 Bb8 (15...Qd8 16.Qe2+=) 16.Qe2 Nd6 17.Nb1 Nc8 (17...Nc4 18.Nc3 Qe7 19.Nb5+=) 18.Rfc1 (worse is 18.Qb5 Na7 19.Qa4 Nc6 20.Qc6 Ra7–/+) 18...Nd6 (18...Na7 19.R6c2+/–) 19.Nc3 Qe7 20.Nb5 Nc4 21.h4 h6 22.R1c4 (22.h5 Nf6+=) 22...dc4 23.Qc4 (23.Qc4 Re8 24.d5 ed5 25.Qd5 Qf7 26.Qf7 Kf7 27.Nd6 Bd6 28.Rd6+/–) 1–0. Schulz,Hans_Juergen – Hasek,Frantisek, TT–16.31 ETC, 2005.

7.e3 0-0 8.Bb2 Ne4 9.Bd3 f5 10.0-0 Qf6 11.Rc1 g5 12.g3 (12.h3 b6+=) 12...Qh6 13.Ne5 Ndf6 (13...Ne5 14.de5 Be7 15.f3+=) 14.f3+/– Nd2 15.Qd2 g4 16.f4 (16.fg4 fg4 17.Rf4 Qh5+/–) 16...Qg7 17.b5 Bd7 18.a4 Ne4 19.Be4 fe4 20.Qc2 a6 21.bc6 bc6 22.cd5 (22.Qe2 Be5 23.fe5 Rf3=) 22...cd5= 23.Nd7 Qd7 24.Qc6 Ra7 (24...Rfd8 25.Rf2=) 25.f5 Rf5 26.Rf5 ef5 27.Qd5 Kg7 (27...Kh8!?=) 28.Rc6+/– Bb4?? (better is 28...Bf8 29.Qe5 Kg8+/–) 29.Qe5+– Kg8 30.d5 (30.d5 Qg7 31.Qb8 Bf8 32.Bg7 Rg7 33.d6 Rd7 34.Qc8 Rb7 35.Qb7 f4 36.Rc8 f3 37.Qe7 f2 38.Kf2 h6 39.Rf8) 1–0. Kaenel,H – Curien,N, Berga, 1999.

7.e3 0-0 8.Bb2 Ne4 9.Ne4 de4 10.Ne5 Bc7 (10...a5 11.c5 Bc7 12.Qc2+=) 11.Qc2+= f5 12.Be2 Qf6 13.Qc3 Qh4 14.0-0 Rf6 15.g3 Qg5 16.f4 ef3 17.Bf3 (17.Nf3 Qg6 18.Nh4 Qh6+=) 17...Ne5= 18.de5 Rf8 19.Rad1 Rf7 20.Qd4 Rd7 21.Qf4 Qe7 22.e4 a5 23.c5 Qf7 24.Rd7 Bd7 25.Bd1 Rf8 26.Bd4 ab4 27.ab4 Bd8 28.Bb3 fe4 29.Qf7 Rf7 30.Rf7 Kf7 31.Bc2 Bg5 ½–½. Drude,Dieter – Veithoefer,Guenter, M386D, 2003.

7.e3 0-0 8.Bb2 Qe7 9.Ne5 (9.Bd3 a5=) 9...Ne4 (9...Rd8 10.c5 Bc7 11.Bd3=) 10.Ne4 de4 11.Qc2 f5 (11...Qh4 12.g3 Qd8 13.Nd7 Bd7 14.c5+/–) 12.Be2 Qf6 (12...Qg5 13.Nd7 Bd7 14.0-0+=) 13.Qc3 (13.Nd7 Bd7 14.c5 Bc7+=) 13...Nb6 (13...Qg5 14.Nd7 Bd7 15.0-0+=) 14.0-0 Na4 15.Qb3 Nb2 16.Qb2 Qh6 (16...Rd8 17.Rfd1+=) 17.c5 Bc7 18.a4 (18.Qc2 Be5 19.de5 Rd8+/–) 18...Bd7 (18...Rd8 19.Rfd1+=) 19.a5 (19.Rfd1 Rad8+/–) 19...a6 (19...Rad8 20.a6 Rb8 21.Rfd1+/–) 20.f4 (20.Rad1 Rad8+/–) 20...ef3 (20...Be5 21.de5 Rad8 22.Rad1+=) 21.Rf3 Rad8 (21...Be5 22.de5 Rad8 23.Rd1+=) 22.Bc4 (22.Rh3 Qf6=) 22...Be5= 23.de5 Be8 (23...Qh4 24.Rf4 Qh5 25.Raf1+=) 24.Raf1+= Bh5 25.Rf4 Rfe8 (better is 25...Qg6!?+=) 26.Rf5+/– Qe3 27.Qf2 Qf2 28.R1f2 (28.Kf2 Rd4 29.Rh5 Rc4=) 28...Bg6 29.R5f4 h5 (29...Rd1 30.Rf1 Rdd8 31.Kf2+/–) 30.h3 (30.g3 Bd3 31.Bd3 Rd3+/–) 30...Rd1 (30...Bd3 31.Bd3 Rd3 32.Rf7+/–) 31.Rf1 (31.Kh2 Kh7+/–) 31...Rf1 (31...Rd2 32.Kh2+/–) 32.Rf1 (32.Kf1 Kh7+/–) 32...Kh7 (32...Be4 33.g4+/–) 33.Rd1 (33.g4 hg4 34.hg4 Be4+/–) 33...Re7 (33...h4 34.Rd7 Be4 35.Rb7+–) 34.Rd6 (34.g4 hg4 35.hg4 Be4+/–) 34...Bf5 35.Rd4 Kh6 (35...Kg6 36.g4 Bc2 37.Kg2+/–) 36.g4 hg4 37.hg4 Bg6 ½–½. Ritter,Fredi (1700) – Milde,Lars (1815), TT–05.19 TSC, 2003.

7.e3 0-0 8.Bd3 a5 9.c5 Bc7=.

5.Bb2 a5!? 6.b5 Bd6=.

5.Bb2 c5 6.dc5+/– b6 7.cb6 Qb6 8.e3 (8.Bd4 Qb7 9.Nc3+/–) 8...Bd6? (better is 8...Bb4!? 9.ab4 Qb4 10.Bc3 Nc3+=) 9.Nfd2 f5?? (9...Nd2 10.Nd2 0-0 11.c4+/–) 10.c4 (better is 10.Ne4 fe4 11.Bg7 Rf8 12.Bf8 Kf8+–) 10...f4?? (better is 10...Nd2 11.Nd2 0-0+–) 11.c5 (better is 11.Ne4 de4 12.Bg7 Rg8 13.Qh5 Kd8 14.Qh7 Re8+–) 11...Bc5 12.Ne4 (12.Bg7 fe3 A) 13.Bh8?? ed2 14.Qd2 Bf2 (14...Nd2?! 15.bc5 Nf3 16.gf3 Qc5 17.Nd2–+) 15.Kd1 Nd2 16.Nd2 Bd7–+; B) 13.bc5 ef2 14.Ke2 Qc5 15.Ne4 Ba6 16.Kd2 de4 17.Qa4 Nd7 18.Qa6 Qg5 19.Ke2 Qg7 20.Qe6 Kd8+/–; C) 13.fe3+–) 12...de4 (12...Bb4 13.ab4 Qb4 14.Qd2 Qe4+–) 13.Nd2 (better is 13.Bg7 Be3 14.Qh5 Kd7 15.Bh8 Bf2 16.Kd1+–) 13...fe3 14.Qh5 (worse is 14.bc5 ef2 15.Kf2 Qb2–/+) 14...g6 15.Qc5 Qc5 16.bc5 ed2 17.Kd2 0-0 18.Ke3 Bb7 19.Bc4 Re8 (better is 19...Bd5 20.Rac1 Nc6+/–) 20.Rhd1 Na6 (20...Ba6 21.Ba2+–) 21.Ba6 (better is 21.c6!? Bc6 22.Ba6 Reb8+–) 21...Ba6 22.Rd7 e5 23.g3 (23.Rc1 Rab8 24.Ra7 Rb2 25.Ra6 Rf8+–) 23...Rad8 (23...Rab8 24.Bc3 Rb3 25.Rc1+/– (25.Ra7 Rc3 26.Kd2 Rd3 27.Ke1 Bc8–/+; 25.Ke4? Rc3 26.Re1 Rc5–+)) 24.Rad1 (24.Ra7 Bd3 25.c6 Rf8+–) 24...Bd3 25.Ra7 (better is 25.Rd8 Rd8 26.Be5+–) 25...Bc2? (better is 25...Rf8 26.f4 ef3+/–) 26.Rad7?? (26.Rc1!? Bd3 27.c6 Rf8+–) 26...Rd7?? (better is 26...Bd1 27.Rd8 Rd8 28.Ke4 Rc8–+) 27.Rd7+– Rb8 (27...Rc8 28.Rd5+–) 28.Bc1 (28.Be5!? Rb3 29.Kd2 Rd3 30.Rd3 Bd3+–) 28...Rb3 29.Kd2 e3 (29...Rd3 30.Rd3 (30.Kc2?! Rd7 31.Kb3 Kf7+=) 30...Bd3 31.c6+–) 30.fe3 Bf5 31.Rd8 Kf7 32.c6 e4? (32...Rb6 33.c7 Rc6+–) 33.c7 Rd3 34.Rd3 (34.Kc2 h5+–) 34...ed3 35.Bb2 (better is 35.e4!? Bh3+–) 35...Ke7 36.c8Q! Bc8 37.Kd3 Kd6 38.Kd4 h5 39.Kc4 Ba6 40.Kb4 Bd3 41.a4 g5 42.a5 (42.Kc3 Be2+–) 42...Kd5 43.Bd4 Ke4? (43...g4 44.Kc3 Ba6 45.Bb6+–) 44.Kc3 (better is 44.Kc5!?+–) 44...Bf1 45.Kd2 Kf3 46.Be5 Kg2 (46...Ke4 47.Bf6 g4 48.Bd4+–) 47.h4 gh4 48.gh4 Kh3 (48...Kf3+–) 49.Bf6 Kg4 50.e4 Kf4 51.e5 Kf5 52.Kc3 Ke6 53.Kd4 Kd7 54.Kc5 Ke6 (54...Bd3 55.Kb6+–) 55.Kb6 Kd7 56.a6 Ba6 (56...Bg2+–) 57.Ka6 Ke6 58.Kb6 (better is 58.Ka7!? Kd7 59.Kb7 Ke8+–) 58...Kf5 59.Kc6 Ke6 60.Kc7 Kf7 61.Kd7 Kg6 Black threatens to counter with Bg5 62.Bg5 Kf7 63.e6 Kg7 (63...Kf8 64.e7 Kg8 65.e8Q Kg7 66.Qe7 Kg6 67.Qf6 Kh7 68.Qf7 Kh8 69.Bf6) 64.e7 Kh7 (64...Kg6 65.e8Q Kg7 66.Qe7 Kg6 67.Qf6 Kh7 68.Qf7 Kh8 69.Bf6) 65.e8Q Kg7 66.Qh5 Kg8 (66...Kf8 67.Qh6 Kf7 68.Qh7 Kf8 69.Be7) 67.Qf3 (67.Qg6 Kh8 68.Bf6) 67...Kg7 68.h5 (68.Qf6 Kh7 69.Qf7 Kh8 70.Bf6) 68...Kg8 69.h6 Kh7 70.Qf7 Kh8 71.Qg7 (71.Bf6) 1–0. Walter,Brian – Smith,Jalen, Michigan Novice, 2005. (=1.d4 d5 2.Nf3 Nf6 3.a3 e6 4.b4 Ne4)

5.Nfd2 Nd2 6.Qd2 Bd6 7.Nc3 0-0 8.e3 Qh4 9.g3 Qf6 10.Bg2 Nc6 11.0-0 Ne7 (11...a6!?=) 12.e4+= de4 13.Ne4 Qf5 14.Qg5 Qg5 15.Bg5 Nf5 16.c3 h6 17.Bd2 Be7 18.h3 Bd7 19.Bf4 c6 20.g4 Nh4 21.Rae1 Ng2 22.Kg2 Rad8 23.Kg3 Be8 24.Rd1 g5 25.Be3?? (better is 25.Bc7 Rd7 26.Bb8=) 25...f5–/+ 26.Nc5 f4 27.Kg2 (27.Bf4!? Bc5 28.Be5–+) 27...fe3 28.fe3 Bc5 29.bc5 Bg6 30.Rf8 Rf8 31.Rd2 Be4 32.Kg1 Rf3 33.Rb2 Re3 34.Rb7 Rh3 35.Ra7 Rg3 36.Kf2 Rg4 37.a4 Rf4 38.Ke3 Kf8 39.a5 h5 40.Ra8 Kf7 41.a6 e5 42.a7 ed4 43.cd4 h4?? 44.Rh8+– Rf3 45.Ke4 Ra3 46.a8Q Ra8 47.Ra8 h3 48.Kf3 Ke6 49.Kg3 Kf5 50.Kh3 Ke4 51.Rd8 (51.Rd8 Kf3 52.d5 g4 53.Kh2 cd5 54.c6 g3 55.Kg1 Ke2 56.c7 d4 57.c8Q Kd3 58.Qc5 Ke3 59.Qd4 Kf3 60.Re8 g2 61.Re3) 1–0. axxle (2245) – chessnaif (2300), net–chess.com, 2013. (=1.d4 d5 2.Nf3 e6 3.a3 Nf6 4.b4)

5.e3 Qf6 6.Bd3 a5 7.b5 Bd6 8.Be4 de4 9.Nfd2 Qf5 10.Nc3 Nd7 (10...Qg6!? 11.Nce4 Qg2+=) 11.Nde4+/– 0-0 12.a4 (12.Nd6 cd6 13.Qd3 Qg4+/–) 12...b6 13.g4 (13.Nd6!? cd6 14.Qd3+/–) 13...Qg6+= 14.f3 Qh6 15.Qe2 Qh4 16.Qf2 Qf2 17.Nf2 Bb4 18.Bb2 Bb7 19.0-0 (better is 19.e4!?+/–) 19...Bf3= 20.h3 Bb7 21.Ne2 Bf3 22.Ng3 Bd2 (22...f5 23.Ba3 fg4 24.Bb4 ab4 25.Ng4=) 23.Bc1 Bc3 24.Ra3 Bb4 25.Nd3 (better is 25.e4!? Ba3 26.Ba3+=) 25...Bd5+= (worse is 25...Ba3 26.Ba3 Bb7 27.Bf8 Kf8 28.c4+=) 26.Nb4 ab4 27.Ra1 Bc4 28.Rf2 Bb5! 29.Bd2 (29.ab5 Ra5 Double attack (29...Ra1 Pinning; 29...Ra1 Deflection; 29...Ra5 Decoy)) 29...Ba4 30.Bb4 c5 31.dc5 bc5 32.Bc3 Rfd8 33.Ne4 e5 34.Ng5 f6 35.Ne6 Rdc8 36.g5 (36.Rd1 Ra6 37.Ra1 Nb6–+) 36...Rc6 (36...Kf7 37.gf6 Ke6 38.fg7–+) 37.Ng7? (better is 37.Rd2 Re6 38.Rd7–/+) 37...Kg7–+ 38.gf6 Rf6 39.Rg2 Kf7 40.Rg5 Raa6 41.Be5 Ne5 42.Re5 c4 43.Ra2 c3 44.Rc5 Rg6 45.Kh2 Rgd6 46.Kg3 Rac6 47.Rf5 Kg6 48.Rf4 Bb5 49.Ra5 Rc5 50.h4 Re5 51.Rg4 Kf7 52.Rb4 Rb6 53.Kf4 Kf6 54.Rb3 Rc5 55.h5 Rh5 56.Kg3 Rc5 57.e4 Ke5 58.Rb4 h5 59.Kf3 h4 60.Kg4 Be2 (60...Be2 61.Kh3 Ra5 62.Rb6 Ra2 63.Kh4 Rc2–+) 0–1. axxle (2250) – chessnaif (2410), net–chess.com, 2013. (=1.d4 d5 2.Nf3 e6 3.a3 Nf6 4.b4)

5.Bf4 g5 6.Bc1 a5+=.

5.Bg5?? f6 6.Bh4 g5 7.Bg3 g4 8.Nh4 Nd7 9.f3 gf3 10.Nf3 (10.ef3 Ng3 11.hg3 Rg8+=) 10...Nb6 11.Bh4 Nc4 12.Qd3 Bh6 13.b5 Nb2 (better is 13...Bd7–+) 14.Qb3= Bd2?? (14...Nc4 15.Qd3 Bd7–/+) 15.Nfd2+– Nc4 16.Qd3 Nb2 17.Qb3 Nc4 18.Nc4 dc4 19.Qc4 Nd6 20.Qd3 Nf5 21.Bf2 Kf7 22.g4 Qd5 23.Qf3 Qb5 24.gf5 Qb2 25.Qh5 Ke7 26.Kd2 Qa1 27.Bg2 Rg8 28.Qh7 Kf8 29.Qh6 Kf7 30.Qh5 Ke7 31.Qh7 Kf8 32.Bf3 c6 33.Bh4 Qd4 34.Kc1 ef5? 35.Qh6 Rg7 36.Bf6 Qc4 37.Qg7 Ke8 38.Qe7# 1–0. dumbroad – kiwi phill, ChessWorld.net, 2012.

5.Bg5?? Ng5 6.e3 a5 –+.

5.Bb2 0-0 6.Ne5 Nbd7 7.f4 Ne4 8.e3 Bd6 9.c4? Qh4 10.Ke2?? Qf2 11.Kd3 Qb2 12.Nd2 Nf2 (12...Nf2 13.Ke2 Nd1 14.Rd1 Be5 15.de5 dc4–+) 0–1. johntelker (2000) – amikhlin (2375), net–chess.com, 2010.

5.c3 Nc6 6.h3 Bd6 7.Nbd2 h6 8.e3 b6 9.Bd3 e5?? (9...a5 10.b5 Ne7 11.Qc2+=) 10.de5?? (better is 10.Bb5 Bd7 11.Bc6 Bc6 12.de5+–) 10...Ne5= (10...Be5? 11.Bb5 Bc3 12.Bc6 Bd7 13.Bd7 Qd7 14.Rb1+–) 11.Be2 Bd7 12.Nh2 (12.Ne5!? Be5 13.Bb2+=) 12...c5 13.f4 Nc6 14.0-0 0-0 15.Bf3 Re8 (15...Qe7 16.Re1 Be6–/+) 16.b5? (better is 16.Ng4 a5 17.Nf6 Qf6 18.Bd5 ab4 19.Nc4+=) 16...Na5–+ 17.a4 (17.Ng4 Bb5 18.Re1 Bc6–+) 17...Re3 18.Nb1 Re6 (18...Re8 19.Ng4–+) 19.Bd5 Nd5 20.Qd5 c4 21.Nd2 Rc8 (21...Bc6 22.Qf5 Bc5 23.Kh1–+) 22.Ne4? (22.Ng4 Bc6! 23.Qh5 Bb7–+) 22...Qe7 (better is 22...Bc6 23.Qe6 fe6 24.bc6 Nb3–+) 23.Nd6 Rd6 (worse is 23...Qd6 24.Qd6 Rd6 25.Nf3+=) 24.Qh5 (24.Qe5 Qe5 25.fe5 Rd3–+) 24...Nb3 25.Rb1 Qe4 (better is 25...Rc5 26.Qf3 Bf5–+) 26.Rb3?? (better is 26.Ba3 Rd2 27.Qf3–+) 26...cb3 27.Ba3 (27.Qe5 Qe5 28.fe5 Rd3–+) 27...Rd5 (better is 27...Rd2 28.Qf3 Qa4 29.Bc1–+) 28.Qf3 Qc4 29.Rc1 (29.Ng4 Bg4 30.Qg4 Rd2–+) 29...Rd2 30.Nf1 Bc6 (better is 30...Ra2 31.Rd1 Ra3 32.Rd7 b2–+) 31.bc6?? (better is 31.Nd2 Bf3 32.Nc4 Rc4 33.gf3 Ra4 34.Bb2+/–) 31...Rd3–+ 32.Qe2 Rc6 33.Qe8 Kh7 34.Ne3 Qa4 35.Bf8?? (35.Re1 Rdc3 36.Bb2 Qf4 37.Bc3 Rc3 38.Kh1–+) 35...Qf4–+ 36.Nf1 (36.Bg7 Kg7 (36...Re3 37.Qh8 Kg6 38.Rf1+–) 37.Rf1 Qe3 38.Qe3 Re3–+) 36...Rg6 (36...Qc1 37.Qc6 Rd1 38.Qe4 Kg8–+) 37.Qe2 (37.Re1 Rc3 38.Re2–+) 37...Rh3 38.Qd2 Qh4 39.Nh2 Rh2 40.Kf1 Rf6 0–1. capacuba (2345) – crisilva (2050), net–chess.com, 2015. (=1.d4 d5 2.Nf3 e6 3.a3 Nf6 4.b4 Be7)

5.c4 0-0 (5...dc4!? 6.Nc3 c6–/+) 6.Nc3 b6 7.e3 Bb7 8.Bb2 Nbd7 9.cd5 ed5 10.Bd3 c5 11.bc5 bc5 12.0-0 Ne4 (12...c4 13.Bf5=) 13.Qc2+= f5 14.Nd2 (14.dc5 Ndc5 15.Rac1 Rc8=) 14...Bd6 (14...c4 15.Be2=) 15.Nb5 Ndf6? (better is 15...Be7!?=) 16.Be4 (16.Nd6 Qd6 17.dc5 Nc5 18.Bf6 Rf6 19.Bf5 Rh6+/–) 16...fe4 17.dc5 Bc7 18.g3 (18.Qb3!? Kh8 19.Rad1+/–) 18...Ba6+= 19.Nc7 (better is 19.a4!? Ba5 20.f3+=) 19...Qc7= 20.f4 (20.Rfc1!? Ng4 21.Ne4 de4 22.Qe4 Nf2 23.Qe6 Qf7 24.Qf7 Rf7 25.Bd4–/+) 20...Bf1 21.Nf1 Rfc8 (21...Qc6 22.Rd1–/+) 22.Bd4 (22.Qd1 Qd7 23.Bf6 gf6+=) 22...Nd7 (22...Qc6 23.Rd1–/+) 23.Rc1 Rab8 (23...Nb8 24.Be5 Qf7 25.Qd2–/+) 24.Qa2 (24.Qc3 Qc6–/+) 24...Qc6–/+ 25.Nd2 Kf8 26.Nb3 Qb5 (26...Rc7 27.f5–/+) 27.Nd2 Nc5?? (better is 27...Qb7+=) 28.Qd5+– Nd3 (28...Qd3 29.Rc5 Rc5 30.Bc5 Ke8 31.Qg8 Kd7 32.Qb8 Qd2 33.Qa7 Kc8 34.Qa6 Kc7 35.Bb6 Kd7 36.Qb7 Kd6 37.Qc7 Ke6 38.f5 Kf5 39.Qf7 Kg5 40.Qg7 Kf5 41.Qh7 Ke5 42.Qe7 Kf5 43.Qf7 Kg5 44.Qf4 Kg6 45.Qe4 Kf7 46.Qf5 Ke8+–) 29.Rc8 Ke7 30.Qb5 (30.Rc7 Qd7 31.Rd7 Ke8 32.Qf7) 30...Rb5+– 31.Rc7 Ke6 32.Ne4 (32.Ra7 g5+–) 32...Rb1 33.Kg2 Ne1 (33...a5 34.Ng5 Kd6 35.Ra7+–) 34.Kh3 Nf3 (34...Nd3 35.Rg7 a5 36.Ra7+–) 35.Ng5 (better is 35.Rg7 Rd1+–) 35...Ng5 36.fg5 Kf5 (36...a5 37.Rg7 Rb5 38.e4+–) 37.Rc5 (37.Kh4!? Ke4+–) 37...Kg6 (37...Ke6 38.Ra5 Rb7 39.Ra7 Ra7 40.Ba7+–) 38.Kg4 Rh1 (38...Rb7 39.Ra5+–) 39.Rc6 (39.h3 h5 40.Kh4 Rf1+–) 39...Kf7 40.Rc7 Kg6 (40...Ke8 41.h4 Rf1+–) 41.Rg7 1–0. Lee Wing Kin – Dai,Andrew Sicheng, Hong Kong Chess Championships, 2018.

5.e3 b6 6.Bb5 (6.Nc3 0-0=) 6...Bd7+= 7.Bd7 Nbd7 (worse is 7...Kd7 8.c4 Kc8 9.cd5 ed5 10.Nc3+=) 8.0-0 0-0 9.Re1 (9.Nc3 a5 10.b5 Qc8=) 9...Ne4 10.Nbd2?? (better is 10.Nfd2–/+) 10...Nc3–+ 11.Ne5 (11.Bb2 Nd1 12.Red1 c6–+) 11...Nd1 12.Rd1 (12.Nc6 Qe8 13.Rd1 Nf6 14.Ne7 Qe7–+) 12...Ne5 13.de5 c5 (13...a5 14.ba5 Ra5 15.Nf3–+) 14.b5 (14.bc5 Qc7 15.Bb2 Qc5–+) 14...Qc7 Black intends c4 15.f4 (15.Nf3 a6–+) 15...a5 (15...a6 16.ba6 Ra6 17.Nf3–+) 16.ba6 (16.a4 g5–+) 16...Ra6 17.Bb2 (17.Nf3 Rfa8–+) 17...c4 18.c3 (18.Nf3 Rfa8–+) 18...Rfa8 19.Nb1 (19.Nf3 Ba3 20.Bc1 b5–+) 19...Bc5 20.Bc1 Qe7 (better is 20...f6 21.Ra2–+) 21.Rd2 (21.Rf1 b5–+) 21...Be3 22.Kh1 Bd2 (22...Qh4 23.Rd1 Bc1 24.Rc1–+) 23.Nd2 Ra3 24.Ba3 Ra3 25.Rb1 Qa7 (25...Qa7 26.Nf3 Rc3–+) 0–1. Cavalcante,GFC – De Meneses,LCM, Aberto do Brasil – IX Memorial Bobby Fi, 2018.

5.g4 b6 6.a4? (better is 6.Ne5+=) 6...Bb4–+ 7.c3 Be7 8.Ne5 0-0 9.a5 Ne4 10.e3 Bh4 11.Nd3 (11.Ra2 Nd7 12.Nd7 Bd7–+) 11...Qf6 12.Qc2? (better is 12.Ra2–+) 12...Ba6 13.ab6 ab6 14.c4 (14.Ra6 Na6 15.Bg2 b5–+) 14...Bc4 (better is 14...dc4 15.Ne5 Nf2 16.Rg1 Ng4 17.Kd1 Ne5 18.Bg2–+) 15.Ra8 Qf3 16.Nd2 (16.Bg2 Qg2 17.Rf1–+) 16...Bf2 17.Nf2 Qe3 18.Kd1 Nf2 0–1. Sterle,Vincent – Ognyanovic,R, Yugoslavia corr, 1984. (=1.d4 Nf6 2.b4 e6 3.a3 d5 4.Nf3 Be7)

6.c4 c6 7.Nc3 Nbd7 8.Bd3 h6 9.cd5 cd5 10.0-0 b6 11.Bb2 Bb7 12.Qc2 a6 13.e4+= (13.Rfc1 Rc8=) 13...de4 14.Be4 (14.Ne4 Rc8 15.Qb1 b5+=) 14...Ne4 15.Ne4 Rc8 16.Qd3 Nf6 17.Nf6 Bf6 18.Rfc1 (withdraw) (18.Rfc1 Rc1 19.Rc1–/+). Gross,Gerald – Lowry,Paul, e–mail b4–01–05, 2001.

6.Bd2 c6 7.Bd3 a5 8.ba5 Nbd7 9.0-0 Qc7 10.Re1 Ng4 11.h3 Nh6 12.c4 Nf6 13.Qb3 dc4 14.Qc4 Nf5 (14...Rd8 15.e4+/–) 15.Qb3 (better is 15.e4 Nd6 16.Qc2+–) 15...Nd5? (better is 15...Qd8+/–) 16.e4+– Nh4 17.Nh4 (17.ed5?! Nf3 18.gf3 Bf6+–) 17...Bh4 18.ed5 ed5 19.Bb4 Bh3 (19...Rd8+–) 20.gh3 Qf4 21.Qc2 Rfe8 22.Bh7 Kh8 23.Bd3 Qg5 (23...Qd4 24.Rf1+–) 24.Kf1 Re1 25.Be1 Re8 26.a6 ba6 27.Nc3 Qf4 28.Ne2 Qh2 29.Qc6 Qh3 30.Kg1 Qg4 (30...Rd8 31.Ba6 Qg4 32.Kh2+–) 31.Kh2 Rg8 (31...Qe6 32.Qa6 Qe7 33.Qc6+–) 32.Qd5 Bf6 33.f3 Qh4 (33...Qg5 34.Qf7 Rd8+–) 34.Bh4 (34.Bh4 Rb8 35.Qh5 Kg8 36.Bf6 gf6 37.Qh6 Rb1 38.Rb1 f5 39.Rb8) 1–0. pierred – davidyung1, Yahoo, 2005.

7.Nbd2 A) 7...Nd7 8.Bd3 f5 (8...Nd2 9.Nd2 a5 10.b5 c5 11.bc6 bc6 12.Rb1 Ba6 13.0-0 c5+=; 8...Ndf6 9.0-0 a5 10.b5 Bd7 11.c5 Qe8 12.a4 b6 13.c6 Bc8+/–; 8...a5 9.b5 f5 10.0-0 c6 11.bc6 bc6 12.Bb2 Ba6 13.Qc2 Rb8=) 9.0-0 a5 10.b5 c6 11.bc6 bc6 12.Bb2 Ba6 13.Rb1 Rb8=; B) 7...Nd2 B1) 8.Qd2 c6 (8...a5 9.b5 c6 10.Qc2 Bd7 11.bc6 Bc6 12.c5 Nd7 13.Bd3 f5+=; 8...Bd7 9.Qc2 a5 10.b5 c6 11.bc6 Bc6 12.c5 Nd7 13.Bd3 f5+=; 8...a6 9.Qc2 h6 10.Bd3 dc4 11.Bc4 b5 12.Be2 a5 13.ba5 Ra5+=; 8...Nd7 9.cd5 ed5 10.Bd3 Nf6 11.0-0 Ne4 12.Qc2 Bf5 13.Ne5 f6=) 9.c5 b6 10.Bd3 a5 11.Rb1 Ba6 12.b5 cb5 13.Qc2 bc5+=; B2) 8.Bd2 a5 9.Qb1 ab4 10.Bb4 b6 11.Be7 Qe7 12.Bd3 h6 13.cd5 ed5=; B3) 8.Nd2 Nd7 (8...a5 9.b5 c5 10.dc5 Bc5 11.Bb2 a4 12.cd5 ed5 13.Bd3 Bd6+=) 9.Qf3 c6 10.Rb1 a5 11.b5 cb5 12.Rb5 Qc7 13.Bd3 b6+=; C) 7...a5 8.b5 c6 (8...c5 9.Bb2 Nd7 10.Be2 Nd2 11.Qd2 dc4 12.dc5 Nc5 13.Bc4 Qb6=; 8...Bd7 9.Ne4 de4 10.Nd2 f5 11.c5 a4 12.Bc4 b6 13.c6 Bc8+/–; 8...Nd2 9.Qd2 c6 10.Qc2 Bd7 11.bc6 Bc6 12.c5 Nd7 13.Bd3 f5+=; 8...a4 9.Bd3 Nd2 10.Bd2 dc4 11.Bc4 c6 12.bc6 Nc6 13.Qc2 Bd6+=) 9.Ne4 de4 10.Nd2 f5 11.c5 e5 12.Qb3 Kh8 13.Bb2 a4=.

7.Bd3 a5 8.b5= c6 9.0-0 f5 10.a4 dc4 11.Bc4 Nd6 12.Bd3 Bd7 13.Nc3 cb5+=.

7.Bd3 Nd7 A) 8.0-0 a5 (8...Ndf6 9.Nbd2 a5 10.b5 Bd7 11.c5 Qe8 12.a4 b6 13.c6 Bc8+/–; 8...f5 9.Nbd2 a5 10.b5 c6 11.Bb2 cb5 12.cd5 ed5 13.Bb5 Ndf6+=; 8...c6 9.Nbd2 Nd2 10.Bd2 dc4 11.Bc4 Bd6 12.Qc2 Qf6 13.Bd3 h6+=; 8...a6 9.Qc2 f5 10.Nc3 Ndf6 11.Ne5 Nd7 12.Bb2 Ne5 13.de5 c6+=) 9.b5 f5 10.Nbd2 c6 11.Bb2 cb5 12.cd5 ed5 13.Bb5 Ndf6+=; B) 8.Nbd2 f5 (8...Nd2 9.Nd2 a5 10.b5 c5 11.bc6 bc6 12.0-0 Rb8 13.Qc2 Nf6+=; 8...Ndf6 9.0-0 a5 10.b5 Bd7 11.c5 Nc3 12.Qb3 Nce4 13.Ne5 Nd2+/–; 8...a5 9.b5 f5 10.0-0 c6 11.Bb2 cb5 12.cd5 ed5 13.Bb5 Ndf6+=) 9.0-0 a5 10.b5 c6 11.bc6 bc6 12.Bb2 Rb8 13.Rb1 Ba6=; C) 8.Qc2 a5 (8...Ndf6 9.Nbd2 a5 10.b5 Nd2 11.Bd2 c6 12.bc6 bc6 13.Ne5 dc4+=; 8...f5 9.0-0 a5 10.b5 c5 11.Nc3 Nb6 12.cd5 Nc3 13.Qc3 Nd5+=) 9.b5 f5 10.0-0 c5 11.Nc3 Nb6 12.cd5 Nc3 13.Qc3 Nd5+=.

7.Bd3 f5 8.0-0 a6 (8...Nd7 9.Nbd2 a5 10.b5 c6 11.Bb2 cb5 12.cd5 ed5 13.Bb5 Ndf6+=; 8...c6 9.c5 Nd7 10.Bb2 Qe8 11.Nc3 b6 12.Qa4 Bb7 13.Qc2 Rb8+=; 8...a5 9.b5 Nd7 10.Nbd2 c6 11.Bb2 cb5 12.cd5 ed5 13.Bb5 Ndf6+=; 8...Bd7 9.Qb3 Bc6 10.Ne5 dc4 11.Bc4 Bd5 12.f3 Nf6 13.Nc3 c6+=) 9.Qc2 dc4 10.Bc4 b5 11.Bb3 a5 12.ba5 c5 13.dc5 Nc5=.

7.Bd3 f5 8.Nbd2 Nd7 (8...a5 9.b5= c6 10.bc6 Nc6 11.0-0 b6 12.Bb2 Ba6 13.Rc1 Bd6=; 8...dc4 9.Nc4 b5 10.Na5 Qd5 11.Qc2 Bd6 12.Be4 fe4 13.Nd2 Nd7+=; 8...c6 9.0-0 Nd7 10.Bb2 a5 11.b5 cb5 12.cd5 ed5 13.Bb5 Ndf6+=; 8...a6 9.0-0 Nc6 10.Qb3 b5 11.c5 Bd7 12.a4 a5 13.ab5 Nb4+=) 9.Bb2 (9.0-0 a5= 10.b5 c6 11.Bb2 cb5 12.cd5 ed5 13.Bb5 Ndf6+=) 9...c6 (9...a5 10.b5= a4 11.0-0 c6 12.Rb1 cb5 13.cd5 b4+=) 10.0-0+= g5 (10...a5 11.b5+= cb5 12.cd5 ed5 13.Bb5 Ndf6+=) 11.h3 (11.Rc1 a5 (11...Qc7 12.Qe2 Rb8 13.Rc2 g4+=) 12.b5 g4+= 13.Ne1 Ndf6+=) 11...Kh8 (11...a5 12.b5+= cb5 13.cd5 ed5+=) 12.Rc1 (12.Qc2 Kg7+/– (12...Kg8 13.Rfc1 Bd6+/–) 13.Rac1 Bd6+/–) 12...h6 (12...Kg7 13.Qc2 (13.Qe2+= Nd2+/–) 13...Bd6+/–; 12...a5 13.b5 cb5+=) 13.b5 (13.Qe2 a5 14.b5 cb5 15.cb5 Qb6+/–; 13.Qc2 Kg7+/–) 13...Kg7 (13...cb5 14.cb5 a6 15.ba6 ba6 16.Rc6+=) 14.Qe2 (14.bc6 bc6 15.Rb1 Ba6+/–) 14...g4 (14...cb5!? 15.cb5 Bd6+=) 15.hg4+/– fg4 (15...dc4 16.Bc4 fg4 17.Ne4 gf3 18.gf3+/–) 16.Be4 de4 (16...gf3 17.Bf3 Nb6 18.c5+–) 17.Ne5 (17.Nh2 h5 18.Ne4 Nf6 19.Nf6 Bf6 20.bc6 bc6+/–) 17...Ne5+/– 18.de5 h5 (18...g3 19.Ne4 gf2 20.Rf2 Rf2 21.Qf2+–) 19.Ne4+– Rf5 (19...Qa5 20.Rfd1+–) 20.Nf6 Bf6 (20...Rg5 21.Rcd1 Qh8 22.Ne4+–) 21.ef6 Kh6 (21...Kf7 22.e4 Rg5 23.Qe3+–) 22.Rfd1 (22.e4 Rf6 23.Rfd1 Qe7 24.Qe3 Kg6 25.Bf6 Qf6 26.bc6 bc6+–) 22...Qf8 (22...Qc7 23.e4 Rf4 24.Qe3+–) 23.e4 Rg5 24.e5 Kg6 (24...g3 25.fg3 cb5 26.cb5+–) 25.Rd6 (better is 25.bc6 bc6 26.Qe4 Rf5 27.Qc6 Rb8+–) 25...h4 (25...Qe8 26.bc6 bc6 27.Qe4 Rf5 28.Rcd1+– (28.Rc6 Bb7–/+)) 26.Qe4 Kh6 (26...Rf5 27.Qg4 Rg5 28.Qh4+–) 27.Rcd1 h3 (27...Qf7 28.Bc1 Qg6 29.Qg4 Qh5 30.Qg5 Qg5 31.Bg5 Kg6 32.bc6 bc6 33.Bh4 Rb8+–) 28.Rd8 h2 29.Kh1 (29.Kh1 Rf5 30.Rf8 Bd7 31.Bc1 Kh5 32.Rd4 Kg6 33.Qg4 Rg5 34.Qg5 Kh7 35.Rd7) 1–0. Marram – Sayit Ozturk, internet, 2010.

5.ba5 c5 6.Bb5 Bd7 7.Bd7 Nbd7 8.0-0 Qa5 (8...Bd6 9.Nc3+=) 9.Nc3 Be7 10.Rb1 Qc7 11.a4 0-0 12.Nb5 Qc8 13.c3 (13.Ra1 Nb6+=) 13...c4–/+ 14.Nbd4 (14.Qc2 e5–/+) 14...Ne4 15.Ne1 (15.Qc2 Re8–/+) 15...Ndc5 16.Ba3 (16.f3 Nd6 17.Ba3 Na4–+) 16...Ra4 17.Bc5 Nc5 18.Rb5 Qd7 19.Qb1 (19.f4 Rfa8–+) 19...Nb3! 20.Nec2 (20.Nb3 Qb5 Deflection) 20...Nd2 21.Rb7 Qe8 (21...Nb1 22.Rd7 Nc3 23.Re7+=) 22.Qb6 Nf1 23.Ne6 (23.Kf1 Bf6 24.g3–+) 23...fe6 24.Kf1 (24.Qe6 Qf7 25.Re7 Qe6 26.Re6 Nd2–+) 24...Qf7 (24...Bf6 25.g3 Bc3 26.Qb1–+) 25.f3 (25.f4 Qf5 26.Qb2 Rfa8 27.Re7 Ra2–+) 25...Qf5 26.Nd4 (26.Ne1 Bh4 27.Qb2–+) 26...Qd3 0–1. queensservant (1795) – zunsurfer (2050), gameknot.com, 2014.

5.ba5 Nc6 6.Nc3+=.

5.b5 a4 6.c4= Nbd7 7.d4 Be7 8.c5 b6 (8...0-0!?=) 9.c6+/– Nb8 10.Bd3 0-0 (10...Ne4 11.Nfd2 f5 12.Bc2+=) 11.Nc3 Re8 12.Ne5 Bd7? (better is 12...Rf8+–) 13.cd7 Nbd7 14.f4 h6 15.0-0 Qc8 16.Qf3 (better is 16.Qc2 Rf8+–) 16...Ne5 (16...Nb8+–) 17.fe5 (17.de5?! Nd7+–) 17...Nd7 (17...c5+–) 18.Qf7 Kh8 19.Qg6 (19.Qg6 Nf6 20.ef6 Bf6 21.Qh7) 1–0. Solis,Jose Alberto (2460) – Bonow,Valdir (1925), CiF, 2006. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 a4)

5.b5 Be7 6.Bb2 0-0 7.Be2 c5 8.0-0 Nbd7 9.d3 b6 10.Nbd2 Bb7 11.c4 Qc7 12.Rc1 Rad8 13.Qb3 Qb8 14.Rfe1 Rfe8 15.Bf1 (15.cd5 Nd5 16.Qc2 Bd6=) 15...Bf8 (15...dc4 16.Nc4 (worse is 16.Rc4 Bd5–/+) 16...Bf3 17.gf3=) 16.Qc2 h6 1–0. Daly,C (2335) – Fox,An (2090), Limerick IRL, Men Ch, 2013. (=1.Nf3 d5 2.e3 Nf6 3.b4 e6 4.a3 a5 5.b5 Be7)

6.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 c5 6.e3).

6.c4 b6 7.Bb2 Nbd7 8.Be2 Bd6 9.d4 Bb7 10.Nbd2 0-0 11.0-0 Rc8 12.h3 (12.Rc1 cd4 13.Nd4 Qe7 14.cd5 Rc1 15.Qc1 Nd5=) 12...Qe7+= 13.Ne5 cd4 14.ed4 dc4 15.Ndc4 Bb8 16.Bf3 (16.Rc1 Nd5=) 16...Ne5+= 17.de5 Rfd8 (17...Rc4 18.Bb7 Nd7 19.Qe2 Ne5 20.Be4+=) 18.Qe2 (18.Qb3!? Bf3 19.Nb6+=) 18...Bf3–/+ 19.Qf3 Nd7 (19...Rc4 20.ef6 Qc7 21.g3=) 20.Rac1= Rc5 Now all is on e5 21.a4 Qh4 (worse is 21...Be5 22.Ba3+/–) 22.g3 (better is 22.Qe2!?=) 22...Qh3–/+ 23.Rfd1 Rcc8 24.Rd4 Nf8 25.Qb7 Re8 26.Qb6 Ng6 27.Re1 f6 (27...Qh5 28.Qa5 Bc7 29.b6+–) 28.Nd6 Ne5 29.Re5 Bc7? (29...Bd6 30.Rh4 Qh4 31.gh4+/–) 30.Qa6 (better is 30.Qc7! Rc7 31.Ne8 fe5 32.Rd8+–) 30...Bd6+/– 31.Rh4 Qh4 32.gh4 fe5?? (32...Be5 33.Be5 Ra8+/–) 33.Qa5 (better is 33.Qd6 e4 34.Kh2+–) 33...Rc2+= 34.Qa6 (34.Bc3!? Be7 35.Be5 Bh4 36.Bd4+=) 34...Bc5= 35.Be5 Rf2 (35...Bf2 36.Kh1 Bh4 37.Qd6=) 36.Bd6 (36.Kh1 Rd8 37.Qe6 Kh8 38.Bg7 Kg7 39.Qe5 Kf7 40.Qh5 Ke6 41.Qh6 Rf6–/+) 36...Be3= 37.Bg3 Rc2 38.Kf1 Bc5 39.Ke1 e5 40.b6?? (better is 40.Kd1 Rc3 41.Qc6 Rd8 42.Ke2 Rc2 43.Kf3 Rd3 44.Ke4 Re3 45.Kf5 g6 46.Ke6 Rg3 47.Qd5=) 40...Bb4–+ 41.Kd1 Rec8 42.Qc8 Rc8 43.Be5 Rd8 44.Kc2 Rd7 45.Bc3 Bc5 (45...Bc5 46.a5 Kf7–+) 0–1. Liptak – Nemes, 1996. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 c5)

6.c4 b6 7.Bd3 Bd6 8.cd5 ed5 9.Bb2 Nbd7 (9...0-0 10.0-0+=) 10.Bf5 Qe7 11.d4 0-0 12.Nc3 (12.0-0 c4=) 12...Bb7 13.Qc2 Rfe8 14.0-0 Rad8 15.dc5 Nc5 (15...bc5 16.Na4=) 16.Na4 Na4 17.Qa4 Ne4 (17...Bc8!? 18.Bd3 Be6+=) 18.Qd4+/– Qf6 19.Qf6 Nf6 20.Bf6 gf6 21.a4 Be5 22.Rad1 Rd6 (22...Re7 23.Nd4+/–) 23.Rd2 Red8 (23...Bc8 24.Bc8 Rc8 25.Nd4+/–) 24.Rfd1 h6 25.Nd4 Kg7 (25...Re8 26.Rc2+–) 26.Ne2 (26.Rc2 Re8+–) 26...Bc8 (26...Re6 27.Be6 fe6 28.f4+–) 27.Bc8 Rc8 28.f4 Bc3? (28...Rcd8+–) 29.Rc2 (29.Rd5?! Rd5 30.Rd5 Bb4+–) 29...d4 30.Rc3! (30.Rc3 dc3 31.Rd6+–; 30.Nc3?! d3 31.Rcc1 d2+–) 1–0. Laurent,Claude – Bouma,Jan, corr TKM/A007, 1999.

6.c4 d4 7.Bb2 de3 8.de3 Qd1 9.Kd1 b6 (9...Be7 10.Bd3=) 10.Nbd2 (10.Bf6 gf6 11.Ke1 Bg7=) 10...Bb7 11.Bd3 (11.Bf6 gf6 12.Kc2 Nd7=) 11...Nbd7 12.Kc2 Bd6 13.h3 Bc7 (13...e5 14.e4=) 14.e4 e5 15.Rae1 ½–½. Nepustil – Hruska, 1997. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 c5)

6.c4 Bd6 7.Bb2 0-0 8.d4 b6 9.Nbd2 Bb7 10.h3 (10.dc5 Bc5 11.Bd3 dc4 12.Nc4 Bf3 13.gf3 Nbd7=) 10...Nbd7+= 11.Bd3 Ne4 (11...cd4 12.ed4 (12.Bd4? e5–+) 12...Rc8 13.0-0+=) 12.Qc2 f5 13.Rg1 (13.0-0 Rc8=) 13...Ndf6 (13...cd4 14.Bd4 Ndc5 15.cd5 Bd5 16.Nc4+=) 14.g4 cd4 (14...Nd2 15.Nd2 Bh2 16.Rf1 cd4 17.gf5 de3 18.fe3+=) 15.Nd4= (worse is 15.Bd4 Nd2 16.Nd2 e5+=) 15...Qd7 16.gf5 (16.g5 Ne8 17.cd5 ed5=) 16...ef5= 17.Nc6 Nd2 (worse is 17...Bc6 18.bc6 Qc6 19.cd5 Qc2 20.Bc2+/–) 18.Kd2 Bc6 19.bc6 Qc6 20.Rg2 (20.Qb3!?=) 20...Kh8+= 21.Rag1 Ra7 22.Bf5 (22.cd5 Qd5 23.Qc4 Qc4 24.Bc4 f4+=) 22...dc4–/+ 23.Bh7 (better is 23.Ke2!?–/+) 23...Bh2–+ (23...Nh7 24.Rg7 Rf2 25.Ke1 Rf1 26.Kf1 Qf3 27.Ke1 Qe3 28.Kd1 Qf3 29.Kc1 Qf1 30.Rf1 Rg7 31.Qc3 Be5 32.Qe5 Nf6 33.Qf6 c3 34.Bc3 Kh7 35.Qg7) 24.Rg7? (better is 24.Bf5–+) 24...Rd7 (24...Rg7 25.Rg7 Qd6 26.Ke2–+) 25.Kc1 Bg1 (25...Rg7 26.Rg7 Qh1 27.Kd2 Ne4 28.Qe4 Rf2 29.Kc3 Qe4 30.Be4 Kg7 31.Bc1–+) 26.Qg6?? (26.Be4 Qe4 27.Rd7 Qc2 28.Kc2–/+) 26...c3 (26...c3 27.Qh6 cb2 28.Kb2 Qb5 29.Kc1 Qf1 30.Kb2 Rg7 31.Bd3 Nh7 32.Bf1 Rf2 33.Kc3 Rf6–+) 0–1. Liptak – Varga, 1996. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 c5 6.c4 Bd6)

6.c4 Bd6 7.d4=+.

6.c4 Be7 7.Bb2 0-0 8.d4 Nbd7 9.cd5 ed5 10.dc5 Nc5 11.Be2 Bf5 12.0-0 a4 13.Nc3 Be6 14.Rc1 (14.Rc1 Bd6 15.Re1+=). SkyNet – playwaycool, ChessWorld.net, 2006.

6.c4 Be7 7.Be2 0-0 8.0-0 b6 9.Bb2 Bb7 10.d4 Nbd7 11.Nbd2 Rc8 12.Rc1 cd4 13.Nd4 Re8 (13...Nc5 14.cd5 Bd5 15.f3=) 14.cd5+= Nd5 15.Nc6 Bc6 16.bc6 Nc5 17.Qc2 Bf6 (17...Qc7 18.Bb5=) 18.Bf6+= Qf6 (18...Nf6 19.Rfd1+=) 19.Nb3 Nb3 20.Qb3 Qe5 21.Bf3 Qd6 (21...Qc7 22.Rfd1 Nf6 23.Qd3+=) 22.Qb5 Qa3 23.c7 Qb4?? (better is 23...Qe7+=) 24.Qe8!!+– (24.Qe8 Re8 25.c8Q Rc8 26.Rc8 Qf8 27.Rf8 Kf8 28.Bd5 ed5 29.Rb1+–) 1–0. marekt (1800) – wwgia (1705), gameknot.com, 2013. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 c5 6.c4 Be7)

6.Be2 Bd6 7.Bb2 Nbd7 8.d3 e5 (8...Qb6 9.c4=) 9.Nbd2 (9.c4 dc4 10.dc4 Qc7=) 9...Qe7 (9...0-0 10.c4=) 10.c4 (10.0-0 0-0=) 10...e4 11.de4 (11.Nh4 ed3 12.Bd3 Ne5+=) 11...de4 12.Ng5 (12.Nh4 Qe6+=) 12...Be5+= 13.Be5 Qe5 14.Nh3 (14.h4 0-0+=) 14...Nb6 15.Nf4 0-0 (15...g5 16.Nd5 Nbd5 17.cd5 Qd5 18.Qc2=) 16.Rc1 (16.0-0 Rd8 17.Qc2 g5=) 16...Rd8 17.Qc2 g5 18.Nd5 Nbd5 19.cd5 Rd5 20.Nc4 Qc7 21.Qb2 Ne8 (21...Qd8 22.0-0=) 22.0-0 b6 23.f4 (23.f3 Bf5+=) 23...Bb7 24.Rcd1 Rad8 (24...gf4 25.Rf4 Rd1 26.Bd1=) 25.Rd5 Rd5 26.Qb3 Rf5 (26...gf4 27.Rf4 Rd7 28.Rg4 Kh8 29.Rf4=) 27.Ne5 (27.fg5 Rf1 28.Bf1 Bd5=) 27...h6 (27...Qe7 28.Nc6 Bc6 29.bc6 gf4 30.ef4+=) 28.Rd1= Bc8 (28...a4 29.Qc3 gf4 30.ef4+=) 29.Bc4 (29.Qc2 gf4 30.Ng4 Kf8 31.Qe4 Rg5+=) 29...Nd6 (29...Kf8 30.g4 Rf6 31.fg5 hg5 32.Qb2=) 30.Ng4 (30.Rd6 Qd6 31.Nf7 Qd2 32.Ng5 Kf8 33.Ne4 Qe1 34.Bf1 Be6+=) 30...Kh7 31.fg5 hg5 (worse is 31...Rg5 32.Nf6 Kg6 33.Rd6 Qd6 34.Ne4+=; worse is 31...Nc4 32.Qc4 Rg5 33.Nf6 Kg6 34.Ne4+=) 32.Bd5 Kg6 (32...Qe7 33.Bc6=) 33.Qc3 (33.Bc6 Qe7+=) 33...f6 (33...Nb5 34.Qh8 Rf3 35.Be4 f5 36.Rd6 Qd6 37.Qg8 Kh5 38.Qh7 Qh6 39.Qh6 Kg4 40.gf3) 34.a4 (34.Bc6 Ba6=) 34...Qe7 35.h3 Rd5 (35...Kg7 36.Qd2=) 36.Rd5 Bg4 37.hg4 Qe6 38.Rd1 Nf7 39.Qd2 Ne5 40.Qd6 Qb3 41.Re1 Qc3 42.Rf1 Qe3 43.Kh1 Ng4 44.Qe6 (44.Qb6?? Qg3 45.Rf6 Nf6–+) 44...Nf2 45.Kg1 Nh3 46.Kh2 Nf4 47.Qe8 (47.Qb6? Qd2 48.Rf4 Qf4 (48...gf4?! 49.Qe6–+) 49.Kg1 e3–+) 47...Kf5 48.Qd7 ½–½. Seckler,Siggi – Kaltschmidt,Andreas, remoteschach.de, 2003.

6.Be2 Bd6 7.d3 Nbd7 8.Nbd2 0-0 9.Bb2 Re8 10.c4 b6 11.a4 Qc7 12.0-0 h6 13.Rc1 Bb7 14.g3 Qd8 15.Re1 Bc7 16.Bf1 Qe7 17.Nh4 Red8 18.Bg2 Rab8 19.f4 Rbc8 20.cd5 Nd5 (worse is 20...ed5 21.e4 d4 22.e5+–) 21.Nc4 Ba8 22.Qe2 Nb4 23.Ba8 Ra8 24.Rcd1 Rac8 25.Rf1 Kh8 26.e4 Kg8 27.Ng2 Ra8 28.Nge3 Rac8 29.d4 cd4 30.Bd4 Qf8 31.Qh5 Kh7 32.Rd2 f6 33.e5 f5 34.Rfd1 Nc5 35.Bc5 Qc5 36.Kf2 Qe7 37.Nd6 Bd6 38.Rd6 Rd6 39.ed6 (worse is 39.Rd6 Rc3=) 39...Qd7 40.Qe2 Rc3 41.Kg1 Rc8 42.g4 g6 43.Qd2 1–0. urdukan (2290) – marekt (2150), gameknot.com, 2015.

6.Be2 Bd6 7.d4 0-0=.

7.Qc2 Bd6 8.Bb2 b6 9.Be2 0-0 10.0-0 Bb7 11.d3 Ng4 12.Nbd2 Qe7 13.h3 Nh6 14.Rad1 f5 15.Rfe1 Nf7 16.cd5 ed5 17.e4 fe4 18.de4 d4 19.Nc4 (19.Bc4 Kh8=) 19...Bc7 (worse is 19...Qe4 20.Qe4 Be4 21.Nd4 cd4 22.Rd4+/–) 20.Bf1 Rae8 21.Na5 ba5 22.Nd4 Be4 (worse is 22...cd4 23.Qc7 Nde5 24.Qe7 Re7 25.Rd4+/–) 23.Qc1 Nd6?? (23...Qd6 24.Nf3 Bd5–/+) 24.f3+= Qh4 25.fe4 (25.Bc4 A) 25...Nc4 26.Qc4 Kh8 27.Ne6 (27.Re4? Re4 28.fe4 Qf2 29.Kh1 Qb2–+) 27...Re6 28.Qe6+–; B) 25...Kh8 26.Ne6 B1) 26...Nc4? 27.Bg7 Kg8 28.Re4+– (28.Nf8 Nce5 29.Be5 Ne5 30.fe4 Nf3 31.Kf1 Rf8 32.Qc4 Kh8 33.Qc5 Rf6–+; 28.Bf8 Nde5 29.fe4 Nf3 30.Kf1 Nh2 31.Ke2 Re6 32.Qc4 Qe4 33.Qe4 Re4 34.Kd3 Re1 35.Re1 Kf8+–); B2) 26...Re6 27.Be6 Bf3=) 25...Qf2 (25...Ne4 26.Qc2 Qg3 27.Qb3 Rf7 28.Qg3 Bg3 29.Nc6 Bf2 30.Kh2 Be1 31.Re1+=) 26.Kh1 Ne4 (26...Re4 27.Bc4 Kh8 28.Ne6 Re1 29.Re1+–) 27.Bc4 Kh8 28.Ne6 Re6 29.Bg7 (29.Be6 Ng3 30.Kh2 Ne2 31.Kh1 Nc1 32.Rc1 Qg3 33.Re5 Be5 34.Be5 Ne5 35.Rb1 Nf3 36.gf3 Qf3 37.Kh2 Qe2 38.Kg1 Qe3 39.Kh1 Rf2 40.Bg4 Qf4 41.b6 Qh2; 29.Rd7?? Qg2!! 30.Kg2 Rg6 31.Qg5 Rg5 32.Kh1 Nf2) 29...Kg7 30.Rd7 Kh8 31.Rc7 Ng3 32.Kh2 Re1 33.Qc3 Rf6 34.Rc8 Kg7 35.Qg3 Qg3 36.Kg3 Re3 37.Kh2 Ra3 38.Rc7 Kf8 39.Bd5 a4 40.Rc5 Rd3 41.Be4 Rd4 42.Rc8 Ke7 43.Bc6 Rb4 (better is 43...h6!?–/+) 44.Rc7= Kd6 45.Rh7 a3 46.Ra7 Rb3 47.Bf3 Kc5 (worse is 47...Rb5 48.Ra3 Rb2 49.h4+/–) 0–1. Llorente,Jose Luis (2020) – Nemec,Zdenek (2110), IECC, 2010.

7.d3 Bd6 8.Nbd2 0-0 9.Bb2 b6 10.g3 Bb7 11.Bg2 Qe7 12.0-0 Rad8 13.Re1 Ng4 14.Qc2 f5 15.Rad1 Bb8 16.Qb3 Kh8 17.h3 Ngf6 18.a4 e5 19.cd5 Bd5 20.Nc4 Bc7 21.Qc3 Rde8 22.Qc2 e4 23.de4 fe4 24.Ng5 Bb7 (24...h6 25.Rd5 Nd5 26.Ne4=) 25.h4 (25.Nd2 Ne5 26.Nge4 Ne4 27.Ne4 Nf3 28.Bf3 Rf3–+) 25...Be5 26.Bh3 Bb2 27.Qb2 Bd5 28.Bd7 Bc4 (28...Qd7 29.Nb6 Qf5 30.Qc3=) 29.Be8+/– Re8 30.Qc3 Bg8 31.Nh3 Ng4 32.Nf4 Ne5 33.Kg2 Nf3 (33...Be6 34.Ne6 Qe6 35.Qc2+=) 34.Rh1 Bf7 35.h5 Ne5 36.Rd2 Kg8 37.Rhd1 Qg5 (37...Qf8+=) 38.Rh1 (38.h6 gh6 39.Rh1 Qf6+/–) 38...Qg4 (38...Qe7 39.Qc2 Nf3+/–) 39.Rh4 Qf5 (better is 39...Qf3!? 40.Kf1 Nc4+/–) 40.Rd6+– White prepares h6 40...Nc4 (better is 40...Nf3 41.Rh1 Rb8+–) 41.h6 Qg5 (41...Qe5 42.Qe5 Ne5 43.hg7+– (43.Rb6?! g5 44.Rh3 Nc4+–)) 42.Rg6!! Qe5 (42...Bg6 43.Qg7 Mate attack; 42...hg6 43.Qg7 Mate attack) 43.Rg7 Kh8 44.Ne2 Nd6 (44...Qc3 45.Nc3 Nd6 46.Rf4+–) 45.Qe5 Re5 46.Rf4 1–0. Anastasian,Ashot – Dvoirys,Semen, It swiss Rostov, 1993. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 c5 6.c4 Nbd7)

7.d3 Be7 8.Nbd2 0-0 9.Bb2 Ne8 (9...Qc7 10.Be2=+) 10.Be2 Bf6 11.Qc2 b6 12.0-0 Bb7 13.Rac1 Rc8 14.Rfd1 Qe7 15.a4 Bb2 16.Qb2 Nd6 17.Ne5 Ne5 18.Qe5 dc4 (18...f6 19.Qb2=+) 19.dc4 (19.Nc4!? Nc4 20.dc4=) 19...Rcd8=+ 20.Nf1 Rd7 21.Rc2 Rfd8 22.Rcd2 Ne8 (22...f6 23.Qc3=+) 23.Rd7= Rd7 24.Qb8 Rd1 25.Bd1 Kf8 26.Bf3 (26.f4 Qd7=) 26...Bf3=+ 27.gf3 Qc7 28.Qa8 Ke7 29.Ng3 Nd6 30.Qg8 (30.Qh8 Nc4 31.Qh7=+) 30...g6 (better 30...Nc4!? 31.Qh7 Nd2=+) 31.Qh7+= Qd7 (31...Qd8 32.Kg2+=) 32.Kg2 (32.Qh4 Kf8+–) 32...Kd8 (32...Qd8 33.Kh3+=) 33.Qh8 Kc7 34.Qc3 (34.Qe5 f5+=) 34...Qe7 35.Qd3 Qg5 (35...f5 36.f4+=) 36.Qd6 0–1. Benko,Francisco – Corte,Cesar Juan, Buenos Aires, 1952. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 c5)

7.d4 Bd6=.

7.cd5 ed5 8.Be2=.

7.cd5 Nd5 8.Bb2 b6 (8...f6 9.Nc3=) 9.Bc4 (9.Nc3 Bb7=) 9...Bd6 (9...Be7 10.Nc3 Bf6 11.Bd5 ed5 12.d4=) 10.0-0 (10.e4 Nf4 11.0-0 0-0=) 10...0-0= 11.d3 Bb7 12.Nbd2 Bc7 13.Qc2 Re8 (13...N7f6 14.e4 Nf4 15.d4=) 14.Rac1+= Rc8 15.Rfd1 Qe7 16.Qb1 (16.d4 cd4 17.Nd4 Bd6=) 16...e5 (16...Red8 17.e4 Nf4 18.Re1=) 17.h3 (17.Qc2 Rcd8=) 17...N7f6 (17...Rcd8 18.Ne4=) 18.Bb3 (18.Qc2 Rcd8=) 18...h6 (18...Qd7 19.Bc4=) 19.Nc4 Nd7 20.Qa2 N5f6 21.Ncd2 (21.Nh4 Qd8=) 21...Bb8 (21...Red8 22.Bc4=) 22.Nh4 (22.Bc3 Bd6=) 22...Nf8 (22...Red8 23.Nf5 Qe8 24.Nc4+=) 23.Nc4 Bc7 24.Nf5 (24.Qa1 Rcd8=) 24...Qd7 25.Nfd6 (25.e4 Ng6 26.Bc3 Nf4=) 25...Bd6+= 26.Nb6 Qb5 (26...Qe7 27.Nc8 Rc8 28.Bc3=) 27.Nc8 Rc8 28.Bf7 Kh7 29.Bc3 Qc6 (29...Rb8 30.Qc4 Qc6 31.f3=) 30.f3 (30.e4 Qa4=) 30...Bc7 (30...Qa4 31.Qb3 Qb3 32.Bb3=) 31.Qb1 (31.Qc2 Rd8=) 31...Kh8 (31...N8d7 32.d4 Kh8 33.d5=) 32.d4 (32.Qb2 N8d7=) 32...ed4 33.Bd4 (33.ed4 Bf4 34.Bd2 Bd2 35.Rd2 Qd7+=) 33...N8d7 (33...cd4 Exploits the pin 34.Rc6) 34.Bf6 (34.Qf5 Qd6 35.Bf6 Qh2 36.Kf1 Nf6–/+) 34...Nf6+= (34...gf6 35.Qg6 f5 36.Be6 Bh2 37.Kh2 Qc7 38.f4+–) 35.Qf5 Bd6 36.Rb1 (36.e4 Rf8 37.Bc4 Bc8–/+) 36...Bg3 (36...Ba6 37.Be6 Rf8 38.Qc2–/+) 37.Rb2 (37.Qg6 Bc7+=) 37...Qc7 (37...Rf8 38.Bc4+=) 38.Bc4 Re8 39.Rbd2 Qe7 (39...Re3 40.Rd8 Re8 41.Re8 Ne8 42.Qf8 Kh7 43.Qg8 (43.Qe8 Bd5 44.Bd3 g6 45.Qg6 Kh8 46.Qh6 Kg8 47.Qg5 Kf8 48.Qd5 Be5+–) 43...Kg6 44.Qe8 Kg5 45.Rd7+–) 40.Re2 (40.e4 Be5+=) 40...Bc7 (40...Rd8 41.Rb1+=) 41.Ree1 (41.Qg6 Qe5 42.f4 Qe4 43.Qe4 Re4+=) 41...Bc6 42.Re2 Bd7 43.Qc2 Rf8 (43...a4 44.Qg6+=) 44.Bd3 (44.Rb1 Bc6+=) 44...Bc6 45.Bc4 Qe5 46.f4 Qe8 47.Ree1 Ba4 48.Bb3 Bb3 49.Qb3 Qe7 (49...Ne4 50.Qc4–/+) 50.Rc1 (50.Qa4 Qe6–/+) 50...Rd8 (50...Ne4 51.Red1–/+) 51.Red1 Rd1 52.Rd1 c4 53.Qc4 (53.Qc3 Bb6 54.Re1 Nd5 55.Qc4 Be3 56.Kh1 Qd7=) 53...Qe3–+ 54.Kh1 Bf4 55.Rd8 (55.Qd3 Qd3 56.Rd3 Kh7–+) 55...Kh7 Do you see the mate threat? 56.Qd3 Qd3 57.Rd3 Kg6 (57...Ne4 58.Rd8–+) 58.g3 Bc7 59.Kg2 Kf5 60.Kf3 Ke6 61.Rb3 (61.Rd4 Be5 62.Rd8 g6–+) 61...Nd7 (61...Nd5 62.Rb2–+) 62.Rb5 (62.Rc3 Be5 63.Rc8 g6–+) 62...Bd8 (62...g6 63.Ke4–+) 63.h4 (63.a4 Bb6–+) 63...Kd6 (63...Ne5 64.Ke4 Nc4 65.Rb8–+) 64.h5–/+ Kc6 65.Rf5 a4 66.Rf4 Nc5 67.Kg4 Bg5 (67...Bf6 68.Kf5–+) 68.Rf3 Bc1 69.Kf5 (69.Rc3 Bb2 70.Rf3 Kd5–+) 69...Kb5 (69...Nb3!? 70.Kg6 Ba3 71.Rf4–+) 70.Kg6 Kc4 (70...Bb2!?–+) 71.Kg7–/+ Ne6 72.Kf6? (72.Kg6!?–/+) 72...Nd4–+ 73.Rf1 Ba3 The passed pawn on a4 quickly leads to threats (73...Bg5 74.Kg6–/+) 74.g4 (74.Kg6!?–+) 74...Bb2 (74...Bb2 75.g5 hg5 76.Kg5 a3–+) 0–1. Jacewicz,Grzegorz – Nemec,Zdenek, corr or01–010, 2001.

7.Bb2 Nbd7=.

7.c4 Bd6 8.d4 0-0 9.Bd3 Nbd7 10.Bb2 (10.Qa4 Ba6 11.Qc6 Qb8+=) 10...Rb8+= 11.Qc2 dc4 12.Bc4 c5 13.Nbd2 Bb7 14.dc5 Nc5 15.0-0 Qc7 (15...Qe7 16.Rfc1=) 16.Bf6 gf6 17.Rfc1 a4 18.Bd3 (18.Rab1 Rfc8=) 18...Kg7 (18...Rfc8!? 19.Bc4 f5=) 19.Qc4 Rg8 20.Ne4 (20.Bc2!? Bc6 21.Qh4=) 20...Be4+= (worse is 20...Nd3 21.Qd3 Be4 22.Qe4+=) 21.Be4 Nb3 (worse is 21...Ne4 22.Qe4 (worse is 22.Qc7 Bc7 23.Rc7 Rgc8 24.Rc8 Rc8=) 22...Qd7 23.Rd1+=) 22.Qc7 Bc7 23.Rc7 Na1 24.h4 (better is 24.Ra7!?–/+) 24...Rgc8–+ 25.Ra7 Rc4 (25...f5!? 26.Bd3 Rb3 27.Ba6 Rc1 28.Kh2 Ra3 29.Bb5–+) 26.Nd4 Rb6 27.Bf3 Nb3 28.Bh5 (28.Be2!? Rc1 29.Kh2 Nd4 30.ed4–/+) 28...Nd4–+ 29.ed4 Rd4 30.g4 (30.g3 f5 31.Bf7 Kf6–+) 30...f5 (30...Kh6 31.Rf7 Rf4 32.Re7–+) 31.Rf7 Kg8 32.Ra7 fg4 33.Kg2 h6 34.Bf7 (34.Ra8 Kg7 35.Ra7 Kf6–+) 34...Kf8 35.h5 (35.Bh5–+) 35...Rf4 36.Bg6 Rb2 37.Rh7 (37.Kg3 e5 (worse is 37...Rbf2 38.Be4–+) 38.Ra5 Rbf2 (worse is 38...Rff2 39.Kg4 Rf4 40.Kg3–+) 39.Re5 R2f3 40.Kg2 Ra3–+) 37...Rbf2 (worse is 37...Rff2 38.Kg3–+) 38.Kg3 (38.Kg1 g3 39.Rh8 Ke7 40.Rh7 Kd6–+) 38...R2f3 39.Kg2 Ra3 40.Rh6 Rb4 41.Rh8 Kg7 42.Rh7 Kg8 43.Rf7 (43.Rc7 Rb2 44.Bc2 Raa2–+) 43...Rb2 44.Kf1 (44.Rf2 Raa2 45.Kg3 Rf2 46.h6–+) 44...Ra1 (44...Ra1 45.Bb1 Rab1) 0–1. Hodgson – Kraidman, 1982. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 c5)

7.d4 Ba6 8.c4=.

7.c4 Bd6 8.Bb2 Nbd7 9.Nc3 0-0 10.cd5 cd5 11.Nb5 Be7 12.a4 Ne4 13.Nfd4 Bb7 14.f3 Nef6 15.Bc3 Bc5 16.Nb3 Bb6 17.d4 Qe7 (17...Bc6 18.Rb1=) 18.Be2 Ne8 (18...Rfb8 19.Qd2+=) 19.Bb2 (19.0-0 Nb8+=) 19...Qg5 20.Kf2 (20.Ba3 A) 20...Qe3?? 21.Bc1 (21.Bf8?! Nf8 22.Rb1 Qg5+=) 21...Bd4 22.Be3 (22.N3d4?! Qe5+-; 22.N5d4?! Qe5+-) 22...Be3 23.Rb1+-; B) 20...Qg2 21.Kd2 e5 22.Bf8 Kf8+=) 20...Nef6 21.Re1 (21.h4 Qg6+/-) 21...Bc6 22.Bc1 Bb5 23.Bb5 Qh4 24.Kg1 Bc7 25.f4 (25.g3 Qh3+=) 25...Ng4= 26.h3 (26.Bd7?? Qh2 27.Kf1 Qh1 28.Ke2 Qg2 29.Kd3 Nf2 30.Kd2 Nd1 31.Kd1 Qf3 32.Re2 Bf4-+) 26...Ngf6 27.Nd2 (27.Bd2 Rfb8=) 27...Nb6 28.Rf1 (28.Ba3 Rfc8=) 28...Bd6=+ 29.Nf3 Qh6 30.Ba3 Ba3 31.Ra3 Ne4 32.Nd2 Nd6 33.Rb3 Nb5 34.Rb5 Nd7 35.Qb3 (35.Nb3 Rfb8+=) 35...Nf6 36.Rb1 Qg6 37.Kf2 (37.Qc3 Qg3=) 37...Ne4 (37...Rfc8!?=) 38.Ne4+= Qe4 39.Rc1 h5 (39...Qf5 40.Qc3+=) 40.Rbc5 (40.Qb1 Qb1 41.Rcb1 Rfc8+/-) 40...h4 (40...Rfb8 41.Qc2=) 41.R1c3 Qg6 42.Qd1 f5 43.Qe1 (43.Kg1=) 43...Qh5 (better 43...Qg3!? 44.Kf1 Qe1 45.Ke1 Rfb8=) 44.Rb3 Rf6 45.Rbb5 g5 46.Ra5 Raf8 47.Ra7 g4 48.Rcc7 Rg6?? Black prepares the advance g3 (better 48...R8f7+/-) 49.hg4 (better 49.Qb4 g3 50.Ke1+-) 49...fg4? (better 49...Qg4!? 50.Qf1 Qg3 51.Ke2 Rb8+=) 50.Kg1 (50.Qb4 Qf5 51.Qb7 Qf6+-) 50...g3 51.a5 (51.Qf1 Qf5+/-) 51...h3+/- 52.a6?? (better 52.Qb1 Rh6 53.Rg7 Kh8 54.Rg3 hg2 55.Kf2+= (worse 55.Kg2 Qe2 56.Kg1 Qh2 57.Kf1 Qh1 58.Rg1 Qf3 59.Ke1 Qe3 60.Kd1 Qg1 61.Kc2 Rh2 62.Kc3 Qb1 63.Rh7 Kh7 64.f5 Rc8)) 52...hg2-+ 53.Rh7 (53.Kg2 Qh2 54.Kf3-+) 53…Qf3 (53...Qf3 54.Rhg7 Rg7 55.Ra8 Qf2 56.Qf2 gf2 57.Kf2 g1Q 58.Ke2 Rg2 59.Kd3 Qf1 60.Kc3 Qc4) 0-1. Chandler,P (2150) - Nurgaliyev,Sauat (1895), 7th Hofheim Spring Open, 2019.

7.d4 Bd6 8.Nbd2 (8.Bd3 Ba6=) 8...Nbd7 (8...Ba6 9.c4=) 9.Bd3 (9.c4 c5=) 9...0-0 (9...e5 10.e4=) 10.0-0 (10.c4 e5 11.c5 Bc7 12.de5 Nc5+=) 10...c5 (10...e5 11.de5 Ne5 12.Rb1+=) 11.c4 Ba6 (11...cd4 12.ed4 Ba6 13.Qe2=) 12.Bb2 Rc8 (12...Rb8 13.Qc2=) 13.Ne5 (13.Qe2 cd4 14.cd5 Bd3 15.Qd3 Nd5 16.Bd4 Qc7=) 13...Nb6 (13...cd4 14.ed4 dc4 15.Ndc4 Be5 16.Ne5 Bd3 17.Nd3+=) 14.Qb3 (14.dc5!? Rc5 15.Bd4=) 14...a4–/+ 15.Qa2 (15.Qd1 cd4 16.cd5 Bd3 (16...Be5?! 17.Ba6 Ra8 18.Bd3=) 17.Nd3 de3 18.fe3 Nfd5–+) 15...Nfd7 (15...cd4 16.cd5 Bd3 (16...Be5?! 17.Ba6 Ra8 18.Nc4+=) 17.Nd3 de3 18.fe3 Nbd5 19.Bf6 Nf6–+) 16.Rfc1 (16.Rad1 cd4 17.cd5 Bd3 (17...Be5?! 18.Ba6 Ra8 19.de6+=) 18.Nd3 de3 19.fe3 ed5–/+) 16...cd4 17.ed4 Ne5 (17...Nc4 18.Ndc4 Bc4 19.Bc4 dc4 20.Rc4+=) 18.de5–/+ Be7 (18...Bc5 19.Qb1 Qh4 20.g3–/+) 19.Bf1+= Bg5 (19...Bc5 20.Rc2+=) 20.cd5 Bd2 (better is 20...Bf1 21.Rc8 Qc8 22.Nf1 ed5+=) 21.Ba6–/+ Bc1 22.Bc8 (22.Rc1 Qd5 23.Qb1 Rc1 24.Qc1 Ra8–+) 22...Bb2–+ (worse is 22...Nc8 23.Rc1 Qd5 24.Qd5 ed5 25.Bd4+=) 23.Qb2 Nc8 (23...Qc8?! 24.Qb6 ed5 25.Rd1=) 24.d6 Nd6 (24...f6!? 25.Rd1 Qd7 26.ef6 Rf6–+) 25.ed6–/+ Qd6 26.Qc2 Ra8 (26...Qf4 27.Rd1–/+) 27.Qe4 Ra5 (27...Qd5 28.Re1–/+) 28.g3 (28.Rc1 g6 29.Qe3 Rd5–/+) 28...g6 29.Qc2 (29.Qf3 Kg7–/+) 29...Qc5 (29...Kg7 30.Qe4–/+) 30.Qd1 (30.Qb2 Rb5 31.Qf6 Rb8–/+) 30...Qc3 31.Rb1 (31.Rc1 Qa3 32.Rc8 Kg7–/+) 31...Ra8 (31...Kg7 32.Qd6–/+) 32.Qd6 Kg7 (32...Rc8 33.Qd7 Rc4 34.Qe7–/+) 33.Qe7 (33.Rd1 Ra5–/+) 33...Rc8 34.Qb4 (34.Qd7 Rc4 35.Qb5 Qd4–+) 34...Rc4 35.Qb5 Re4 (35...Qd4 36.Qb7–+) 36.Qb7 Qf3 37.Rf1 (37.Qb2 e5 38.Qc2 Re2–+) 37...h5 (37...e5 38.Qe7–/+) 38.Qb2 (38.Qe7 Re2–/+) 38...e5 (38...Kh7 39.Qb7–/+) 39.h4 (39.Qc2 Rd4 40.Re1 h4–+) 39...g5 (39...Re2 40.Qb5–+) 40.hg5 h4 41.Qb6 hg3 42.Qf6 Qf6 43.gf6 Kf6 44.fg3 Kg6 (44...Ke6 45.Kf2–+) 45.Rf3 (45.Kf2 f5–+) 45...f5 46.Kf2 Kg5 47.Rc3 Rd4 48.Ke3 (48.Re3 Rd2 49.Ke1 Rd5–+) 48...Kg4 Black fights for the Initiative 49.Rc5 Rd1 50.Re5 Ra1 (50...Kg3?! 51.Rf5 Re1 52.Kd4=) 51.Ra5 Ra3 The passed pawn on a4 quickly leads to threats 52.Ke2 (52.Kd2 Ra2 53.Kc3 Rg2–+ (53...Kg3?! 54.Rf5 Kg4 55.Ra5=)) 52...Ra2 53.Ke1 a3 54.Kd1 Ra1 (54...f4 55.gf4 Kf4 56.Ra8–+) 55.Kc2 a2 56.Kb3 (56.Kb2 Rg1 57.Ra4 Kg3 58.Ra3 Kg4 59.Ka2 Rg2 60.Kb1 f4–+) 56...Rg1 (56...Kg3?! 57.Rf5 Rd1 58.Ka2=) 57.Ra2 Rg3 58.Kc4 Re3 59.Ra7 (59.Ra8 f4–+) 59...f4 60.Rg7 (60.Kd4 Kf3–+) 60...Kf3 (60...Kh3 61.Kd4–+) 61.Rf7 (61.Kd4 Re4 62.Kd3 Re1–+) 61...Kg3 62.Kd4 (62.Rg7 Kf2–+) 62...Re8 63.Kd3 (63.Rg7 Kf2–+) 63...f3 64.Rg7 Kf2 65.Rf7 Kg2 66.Rg7 Kf1 67.Kd2 f2 68.Rg6 Rd8 69.Kc2 Rd4 (69...Rd4 70.Rg8 Rd7–+) 0–1. Krueger – Jung, corr SOK–89–47, 1989.

7.d4 Be7 (7...Nbd7 8.c4=) 8.Bd3 (8.c4 Ra7=) 8...0-0 (8...Nbd7 9.Nc3=) 9.0-0 (9.Nbd2 Nbd7=) 9...c5 10.dc5 Nfd7 ½–½. Majzik,Levente (2330) – Peredy,Ferenc (2310), HUN–chT2 Maroczy, 2002. (=1.Nf3 Nf6 2.e3 d5 3.b4 e6 4.a3 a5 5.b5 c5)

6.c4 0-0 7.d4 b6 8.Qc2=.

6.c4 0-0 7.d4 c5 8.cd5 Nd5 9.e4 Nc7 10.dc5 Bc5 11.Qd8 Rd8 12.Nc3 Nd7 13.Na4 Bd6 14.Be3 Ne8 15.Be2 Nef6 16.Nd2 h6 (better is 16...Be7!?+=) 17.Nc4+/– Bc7 (17...Ne4? 18.f3 Bg3 19.hg3 Ng3 20.Rh2+–) 18.f3 Ne5? (better is 18...Nh5!?+/–) 19.Bb6+– Bb6 20.Nab6 (20.Nab6 Nc4 21.Na8+– (21.Nc4?! Bd7+/–; 21.Bc4?! Rb8+=)) 1–0. daxthedog (2140) – pawnraider (2045), gameknot.com, 2015.

6.c4 0-0 7.d4 Nbd7 8.c5+= Be7 9.Nbd2 (9.Bd3 e5 10.Ne5 Ne5 11.de5 Nd7=) 9...Qe8 (9...Kh8 10.Qc2+=) 10.Qc2 g6 (10...b6 11.c6 Nb8 12.Bd3+/–) 11.Be2+/– Kh8 (11...c6 12.0-0+/–) 12.0-0 Ra7 (12...Kg8 13.a4+/–) 13.Bb2 (13.e4 Nh5+/–) 13...Ng4 (13...Kg7 14.Rfc1+/–) 14.h3 (14.Rfe1 Qd8+/–) 14...Nh6 (14...Ngf6 15.Rad1+/–) 15.e4 f5 16.ed5 ed5 17.Rac1 (17.Rfe1 Qf7+/–) 17...f4 (17...g5 18.c6 bc6 19.Qc6+/–) 18.Rfe1 Nf5 (18...Qf7 19.c6 bc6 20.Qc6+/–) 19.Bd3+– Qd8 20.Qb3 (20.Re2 Nf6+–) 20...c6 (20...Nf6 21.Ne5+/–) 21.Qa4 cb5 22.Bb5 (22.Qb5 a4+–) 22...b6 23.c6 Nf6 24.Qb3 (24.Ne5 Kg7+/–) 24...Bd6 (24...Nd6 25.a4+/–) 25.Ne5 Re7 26.Ndf3 (26.Qf3 g5+/–) 26...Qc7 27.Bd3 Qa7 (27...Kg7 28.Rb1+/–) 28.a4 (28.Bf5 Bf5 29.Nh4 Bc8 30.Nhg6 hg6 31.Ng6 Kg7 32.Ne7 Be7+–) 28...Rfe8 29.Bc3 (29.Bf5 Bf5 30.Nh4 Be4+/–) 29...Ba6 (29...Kg8 30.Bf5 Bf5 31.Bd2+–) 30.Bc2 (30.Bf5 gf5 31.Rb1 Bc7+–) 30...Qc7 31.Bf5 gf5 32.Bd2 Ne4 33.Bf4 Bc4 34.Rc4 (34.Qb2!? Kg8+–) 34...dc4+/– 35.Qc4 Rg8 36.h4 (better is 36.Qb3+/–) 36...Reg7 (better is 36...Kg7!?+/–) 37.Ng5+– Ng5 38.hg5 (38.Bg5 Rf8+–) 38...Rf8 39.Re3 Qa7 (39...Qd8+–) 40.g6! Bc7 (40...hg6 41.Rh3 Double attack) 41.Qe6 Bd8 42.Nf7 Rgf7 43.gf7 Qf7 44.Qf7 Rf7 45.Re8 Kg7 46.Rd8 Re7 47.Rd7 Kf7 48.Bd6 Rd7 49.cd7 Kg6 50.d8Q f4 (50...b5 51.Qe8 Kf6 52.Be5 Kg5 53.f4 Kh6 54.Qf7 ba4 55.Bg7) 51.Qe8 (51.Qf8 h6 52.Be5 f3 53.Qf6 Kh5 54.Qf5 Kh4 55.g3) 51...Kf5 (51...Kf6 52.Be5 Kg5 53.Qg8 Kf5 54.f3 h5 55.Qf7 Kg5 56.Qf6) 52.f3 (52.f3 Kf6 53.Be5 Kg5 54.Qg8 Kh5 55.Qg4 Kh6 56.Bf4) 1–0. Janek – Mezemis, internet, 2017.

6.d4 0-0 7.c4 dc4 8.Bc4 Nbd7 9.0-0 e5 10.Nc3 e4 11.Nd2 Nb6 12.f3 ef3 13.Qf3 (worse is 13.Rf3 Bg4–/+) 13...Ng4 14.g3 (worse is 14.Bf7 Kh8 15.Qe2 Nh2–+) 14...Qe7 Exerts pressure on the backward pawn 15.Nce4 Be6 16.Be6 Qe6 17.Nd6 cd6 18.e4 Rae8 19.a4 f5 20.h3 Nh6 21.e5 de5 22.de5 Nf7 23.Qf5 Qd5 24.Ba3 Re5 (24...Qd2 25.Bf8 Qe3 26.Kh2+–) 25.Qf2 Rfe8 26.Nf3 (26.Qb6 Ng5 27.Qc5 Nh3 (27...Qc5?! 28.Bc5 Rc5 29.h4=) 28.Kh2 Qd2 29.Kh3 Qd7 30.Kh2 Rc5 31.Bc5 Qd5–+) 26...Re2 27.Rae1 (27.Qb6? Ng5 28.Bc5 R8e6–+) 27...Re1 28.Re1 Re1 29.Qe1 ½–½. Flipper – ETC_Chess, playchess.de, 2003.

6.c4 Be7 7.Bb2 0-0 8.Be2 c6 (8...Nb6 9.cd5 ed5 10.0-0=) 9.cd5 cd5 10.0-0 a4 (10...b6 11.Nd4=) 11.d3 (11.d4 b6+=) 11...Qa5 12.d4 Ne4 (12...b6 13.Qe1=) 13.Qe1 (13.Qd3 b6=) 13...Nb6 14.Nfd2 f5 15.Ne4 Qe1 16.Re1 fe4 17.Nd2 Bd7 18.Rac1 Bd6 19.h3 Rf6 20.Rf1 Raf8 21.Rc2 h6 22.Nb1 Kh7 23.Nc3 (23.Nd2 Rf5=) 23...g5+= 24.Bh5 (24.Nb1 h5+=) 24...Kg7 (24...Nc4 25.Be2 Nb2 26.Rb2+=) 25.Bg4 Be8 (25...Nc4 26.Ra1+=) 26.Be2 h5 27.g3 g4 28.h4 (28.hg4 hg4 29.Kg2 Bd7+=) 28...R6f7 29.Nb1 Bd7 30.Kg2 Kg6 31.Nc3 Rc8 32.Rfc1 Rff8 33.Bf1 Rc7 34.Nb1 Rc2 35.Rc2 Kf5 36.Rc1 Ra8 37.Nd2 ½–½. uberlebende (2045) – gambit_queen (2000), gameknot.com, 2014.

6.d4 b6 7.c4 Bb7 8.Nbd2 Bd6 9.Bd3 0-0 10.cd5 Nd5 11.Nc4 N7f6 12.Qc2 Qe8 (12...Rc8!?+=) 13.e4+/– (13.Nd6?! cd6 14.Bb2 Rc8=) 13...Nf4 14.e5 (14.Nd6?! Nd3 15.Qd3 cd6=) 14...c6?? (better is 14...Ng2 15.Ke2 Nh5 16.Bh7 Kh8 17.ed6 Nhf4 18.Bf4 Nf4 19.Ke3 Ng2 20.Ke2 Nf4 21.Ke3 Ng2 22.Ke2 Nf4=) 15.Nd6+– (15.ed6?! Ng2 16.Ke2 cb5 17.Nb6 Ra6+/–) 15...Nd3 16.Qd3 Qe7 17.Nb7 Qb7 18.ef6 gf6 (18...cb5 19.fg7 Kg7 20.Qb5 Qe4 21.Be3+–) 19.Bh6 Rfe8 20.Ne5! Kh8 (20...fe5 21.Qg3 Mate attack) 21.Qf3 (21.Qg3 Rg8 22.Qh4 Rg5 23.bc6 Qc7 24.Bg5 fg5 25.Qg5 Rc8+–) 21...f5 22.Bg5 Kg8 (22...Rg8 23.Bf6 Rg7+–) 23.Bf6 f4 (23...Kf8 24.Qg3 Rec8 25.Qg7 Ke8 26.Qg8) 24.Qg4 Kf8 25.Qg7 1–0. marekt – COMP, 2002.

6.d4 c5 7.bc6 bc6 8.c4 Ba6 9.Nbd2 Be7 10.Be2 0-0 11.0-0 Rb8 12.Qc2 c5 13.Bb2 Nb6 14.dc5 Bc5 15.Nb3 Rc8 16.Nc5 Rc5 17.Bd4 Rc8 18.c5 Be2 19.Qe2 Nc4 20.Rfc1 (20.Nd2 Nd2 21.Qd2 Ne4=+) 20...Ne4 The isolani on c5 becomes a target 21.Ne5 (21.Rc4!? dc4 22.Qc4=) 21...Nc5-/+ 22.Nc4 Nb3 (worse 22...dc4 23.Qg4 g6 24.Rc4=) 23.Qb2 (23.Rd1 A) 23...dc4?! 24.Bg7 Qh4 25.Bf8 Na1 26.Bd6+= (26.Ra1?! Kf8 27.Qc2 c3=); B) 23...Na1 24.Qg4 g6-/+) 23...Nc1 (23...dc4 24.Bg7 Nc1 25.Rc1-/+) 24.Nb6 Nd3 25.Qd2 Rc6 26.Qd3 Rb6 27.Bb6 Qb6 28.Rb1 Qc7 29.g3 Rb8 30.Rb8 Qb8 31.e4 Qa8 32.ed5 ed5 33.Qd4 h5 34.h4 Qc6 35.Qa7 a4 36.Qb8 Kh7 37.Qe5 g6 38.Qf4 Kg8 39.Qb8 Kg7 40.Qb2 Qf6 41.Qb4 Qa1 42.Kg2 Qd1 43.Qb5 Qd4 44.Qc6 Qe4 45.Kh2 Qc4 46.Qd6 d4 47.Qe5 Kh7 48.Qf4 Qd5 49.Qd2 d3 50.Kg1 Kg7 51.Qb2 Kg8 52.Qd2 Qd4 (better 52...Qb3!? 53.Kg2 Qa3 54.g4 hg4 55.h5-+) 53.Kg2 Qe4 54.f3 Qd4 (54...Qd5!? 55.Kf2 Qc5 56.Qe3 Qa3 57.Qe8 Qf8 58.Qe5-+) 55.f4 Qd5 56.Kg1?? (better 56.Kf2-+) 56...Qc5 57.Kg2 (57.Kf1 Qa3 58.f5 Qa1 59.Kg2-+) 57...Qc2 58.Qf2 d2 (58...d2 59.Qd2 Qd2 60.Kf3 Qc3 61.Ke4 Qa3-+) 0-1. Rozen,Eytan (2260) - Emanuel,Yahav (2355), European Youth U18 Teams, 2019. (=1.Nf3 Nf6 2.e3 d5 3.b4 e6 4.a3 a5 5.b5 Nbd7)

6.d4 Bd6 7.c4 dc4 8.Bc4 0-0 9.0-0 e5 10.Be2 ed4 11.ed4 Nd5 12.Bd3 N7f6 13.Qc2 h6 14.Nc3 Nc3 15.Qc3 Be6 16.Bc2 Bd5 17.Re1 Qd7 18.Ne5 Qb5 19.Rb1 Qa6 20.Qg3 Kh8 21.Bd3 Be5 (better 21...Qa7!? 22.Bh6 gh6=) 22.de5+= (worse 22.Re5 Qd6=) 22...Qe6 23.f4 (23.Bh6 gh6 24.ef6 Qf6 25.Qc7 Rg8=) 23...Ng8 (23...Rfe8 24.Bb2 Nd7 25.f5=) 24.f5+= Qc6 25.Be3 (25.Bb2 Rfe8 26.Rec1 Qb6 27.Kh1+–) 25...Qc3= 26.Bb5 (26.f6 g6 27.Bc1 Rfd8=) 26...Qc2 (better 26...c6!? 27.Bf1 Rfe8=+) 27.Bd7 Rfd8 28.Rbc1 Qd3 29.Red1 (29.Rc7 Qa3 30.Be6 Ne7+–) 29...Qb3= 30.f6 g6 (30...gf6 31.Rb1 Qa2=) 31.Bf5 (better 31.Rb1 Qa2 32.Ra1+=) 31...Kh7?? (better 31...Bc6!? 32.Rd8 Rd8=+) 32.h4 (32.Rd3!? Qa2 33.Rc7 Qa1 34.Rc1 Qa2+–) 32...Be6+– 33.Rb1?? (better 33.Rd8 Rd8 34.Bc2+–) 33...Qd5 (better 33...Rd1 34.Kh2 Rb1 35.Bb1 Qb1–+) 34.Bc2 (better 34.Rd5 Bd5 35.h5+–) 34...Qa2 35.Rdc1 h5 (35...Qa3? 36.h5 (36.Rb7 Rd2 37.Bg6 Kh8 38.Bf7 Qc1 39.Kh2 Nf6 40.ef6 Rg2 41.Qg2 Qc2 42.Qc2 Bf5 43.Qg2 Bg4 44.Qg4 a4 45.Qg7) 36...Kh8 37.hg6 fg6 38.Bg6+–) 36.Rb7 Rd7 37.Ba4 (better 37.Qg5 Kh8 38.Ba4+–) 37...Rd3+= 38.Rcc7 (38.Bc6 Qa3 39.Re1+=) 38...Nh6 (better 38...Qe2!? 39.Rf7 Bf7=) 39.Bc2 (39.Qf4 Ng4 40.Bc1 Rad8+=) 39...Nf5+= 40.Qg5 (40.Qf2 Re3 41.Bf5 Qa1 42.Rb1 Qe5 43.Be6 Qc7 44.Qe3 Re8+–) 40...Re3= 41.Bf5 Qa1? (41...Re1 42.Kh2 Bf5 43.Rf7 Qf7 44.Rf7 Kg8 45.Rg7 Kf8 46.Qh6 Rh1 47.Kh1 Be6 48.Re7 Kg8 49.Qg7) 42.Bb1 Re1 43.Kf2 Qb1 44.Rb1 Rb1 45.Qd2 Rab8 46.Qd6 (better 46.Qa5 R8b5 47.Qa7 R5b2 48.Kg3+–) 46...R8b6?? (46...R8b2 47.Kg3 Rg1 48.Qc6+–) 47.Qc5 (47.Qf8 R6b2 48.Kg3 Rb3 49.Kh2 Rh1 50.Kh1 Rb1 51.Kh2 Rh1 52.Kh1 g5 53.Qg7) 47...R6b5 (47...R6b2 48.Kg3 g5 49.hg5 (49.Qa5?! gh4 50.Kf3 Rf1 51.Ke3 Rg2+–) 49...h4 50.Kh2+–) 48.Qa7 (48.Qf8 R5b2 49.Kg3 Rb3 50.Kh2 Rh1 51.Kh1 Rb1 52.Kh2 Rh1 53.Kh1 g5 54.Qg7) 48...Kg8 49.Re7 (better 49.Qa8!? Rb8 50.Qa5 R1b2 51.Kg1 Re2+–) 49...R1b2 50.Ke3 R5b3?? (50...Re5 51.Kd4 Rd5 52.Kc3+=) 51.Kd4 (51.Kf4 Ra3 52.Re6 Ra4 53.Kg5 Rg2 54.Kh6 fe6 55.Qg7) 51...Rd2 52.Kc5?? (better 52.Ke4 Bd5 53.Kf4 g5 54.Kf5 gh4 55.Re8 (55.Qa5?! Rf2 56.Kg5 Rg2 57.Kh6 Rg6 58.Kh5 Bf3 59.Kh4 Rg4 60.Kh3 Bd1 61.Kh2 Rb2 62.Kh3 Rb3 63.Kh2 Rb2 64.Kh3 Rb3=) 55...Kh7 56.e6 (56.Qa5 Rf2 57.Kg5 Rg2 58.Kh5 Bf3 59.Kh4 Rg4 60.Kh3 Be2 61.Kh2 Bf1 62.Qc3 Rc3 63.Rh8 Kh8 64.e6 Rh3) 56...Be6 57.Re6 Rb5 58.Re5 Re5 59.Ke5+–) 52…Rc2 (52...Rc2 53.Kd6 Rd3 54.Qd4 Rd4) 0–1. Uddin,Md Saif (1985) – Mohammad,Javed (2150), Asian Zonal Chess Championships Zone, 2019. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 Nbd7)

6.d4 Be7 7.Nbd2 c5 8.c4 0-0 9.Bd3 Re8 10.Bb2 Bf8 11.0-0 g6 (11...cd4 12.ed4 (12.Bd4? e5–+) 12...b6 13.Ne5=) 12.Re1 Bg7 13.Rc1 b6 14.a4 Bb7 15.Qb3 (15.cd5!? Nd5 16.Nc4+=) 15...Rc8= 16.e4 cd4 (16...de4 17.Ne4 cd4 18.Bd4–/+) 17.Bd4 (better is 17.ed5!? Nc5 18.Qa3=) 17...e5 18.ed5? (better is 18.Ne5!? Ne5 19.ed5–/+) 18...ed4–+ 19.Nd4? (better is 19.Qb1–+) 19...Nc5 20.Qb1 (20.Re8 Ne8 21.Qc3 Nf6–+) 20...Nfe4 (20...Nfe4 21.Ne4 Bd4 22.Nc5 Re1 23.Re1 Rc5–/+) 0–1. Kobernat,Alan – Graham,P, USA op Chicago, 1973. (=1.Nf3 Nf6 2.b4 e6 3.a3 a5 4.b5 d5 5.e3 Nbd7)

5.Bb2 Bd6 6.c4 (6.Be2 a5=) 6...dc4 (6...0-0 7.c5 Be7 8.Be2=) 7.Bc4 0-0 8.0-0 b5 9.Be2 c5 10.bc5 Bc5 11.Qb3 Bb7 (11...Qd5 12.Qd5 Nd5 13.Rc1=) 12.d3 (12.Nc3 Nc6=) 12...Nbd7 (12...Bd5 13.Qc2 Bd6 14.e4+–) 13.Nc3 Be7 (13...Rc8 14.a4 b4 15.Ne4=+) 14.Rfd1 (14.a4 b4 15.Ne4 Ne4 16.de4 Qa5=+) 14...Nc5=+ 15.Qc2 Rc8 16.Qb1 (16.Ne5 Na4 17.Rdc1 Nd5–/+) 16...Qc7 (16...Qd6 17.a4 b4 18.Na2–/+) 17.Bc1 (17.a4 b4 18.Na2 Qa5–/+) 17...Ncd7 (17...Rfd8 18.a4 Bf3 19.Bf3=+) 18.Bd2 (18.Bb2 Bd6=+) 18...Nb6 (18...Ne5 19.Ne5 Qe5 20.d4=+) 19.e4 Nfd7 (19...Qd6 20.e5 Qd7 21.ef6 Bf6 22.d4+–) 20.Rc1= Qb8 21.Nd1 (21.Be3 Qd6=) 21...Rc1 22.Bc1 Rd8 23.Be3 Na4 24.d4 Ndb6 25.Ne5 Bd6=+ 26.Nf3 Qc7 27.h3 Rc8 28.Bd3 Be7 29.Nd2 Nc3 30.Nc3 Qc3 31.Nb3 Nc4–/+ 32.Bc4 bc4 33.Nd2 Ba8 34.a4 a5 35.Ra2 Qb4 36.Qc2 c3 37.Nb1 Qc4 38.f3 Bb7 39.Na3 Ba3 40.Ra3=+ Ba6 41.Kh2 Qb4 42.Qb3 c2 43.Qb4 ab4 44.Rb3 c1Q 45.Bc1=+ Rc1 46.Rb4 Rc8 47.Rb6 Bc4 48.a5 Ra8 49.Rc6 Ba6 50.Rc5 Kf8 51.Kg3 Ra7 52.Kf4=+ Ke7 53.Ke3 Kd6 54.g4 h6 55.h4 Kd7 56.d5 Rb7 57.Rc6 Rb3 58.Kf4? Bd3 59.Rc5? Bb5 60.de6–/+ fe6 61.Rc3?? Rb2 62.Ra3=+ Kc8 63.a6 Kb8 64.a7 Ka8 ½–½. Pignataro,Louis (1840) – Maissa,Frederic (2120), Hautes Alpes op 3rd, 2002.

5.c4= a5 6.b5=.

5.c4 dc4 6.Bc4 Be7 7.d4 0-0 8.0-0 b5 9.Bd3 Bb7 10.Nc3 Bd6 11.e4+/– Be7 12.Qc2 g6 13.e5 Bf3 14.ef6 Bg2?? 15.fe7+– Qe7 16.Kg2 Nd7 17.Ne2 Rac8 18.Be4 Nf6 19.Bg5 Kg7 20.Qc1 Rh8 21.Qf4 h6 22.Qf6 (22.Qf6 Qf6 23.Bf6 Kf6 24.Rfc1+–) 1–0. nitousche – colinwebb, ChessWorld.net, 2004.

5.c4= c5 6.bc5 Bc5 7.d4 Ba7 (7...Be7 8.cd5 ed5 9.Bd3=) 8.Nbd2 Nc6 9.Bd3 0-0 10.0-0 Re8 11.Bb2 Bb8 12.e4 de4 13.Ne4 Ba7 14.d5 (14.Re1 Ne4 (14...Nd4? 15.Nf6 Qf6 16.Bd4 Bd4 17.Nd4+–; 14...Bd4?? 15.Nd4 Ne5 16.Nf6 Qf6 17.Nb5 ab5 18.Be5+–) 15.Be4 f5+/–) 14...Ne4+= 15.Be4 ed5 16.cd5 (16.Bd5 Be6+=) 16...Re4= 17.dc6 Qc7? (better is 17...Qe7!? 18.Qd3 Re6=) 18.Be5+/– Qe7 (18...Qa5!? 19.Qd6 Bc5+/–) 19.Qd5+– Rg4 20.c7 Bf5? (better is 20...Bc5+–) 21.Qb7 Qe8 (21...Qf8 22.h3 Be4+–) 22.Rad1 (22.Rad1 Bb6 23.Qb6+–) 1–0. Logvinov,Kirill (2105) – Bobro,Igor (1865), Anna RUS, Gagarin Mem, 2014.

5.b5 a6 6.ba6 ba6 (6...Na6 7.Bb2 (7.Nc3 Bd6 8.Bb2 0-0 9.Nb5 Be7 10.Be2+=; 7.Bb5 Bd7 8.a4 Bd6 9.Bb2 0-0 10.Na3+=) 7...Bd6 8.Bb5 Bd7 9.Bf6 Qf6 10.Bd7+=; 6...b6 7.Bb5 (7.Bb2 Ba6 8.Ba6 Ra6 9.Nc3 Be7 10.0-0=; 7.a7 Ra7 8.Bb2 Be7 9.Be2 0-0 10.Nc3+=) 7...Bd7 8.a4 Na6 9.Bb2 Bd6 10.Na3=) 7.c4 (7.Bb2 Nc6 8.Ne5 Ne5 9.Be5 Bd6 10.Bd6+=; 7.Be2 Bd6 8.Bb2 Nc6 9.c4 0-0 10.Qa4+=) 7...Nc6 (7...Bd6 8.Bb2+= (8.d4 cd4 9.ed4 dc4 10.Bc4+=) 8...0-0 9.Bf6 Qf6 10.Nc3+=) 8.Be2 (8.d4 Rb8= 9.Ne5 Ne5 10.de5+=) 8...Be7 (8...Bd6 9.0-0+= 0-0 10.cd5+=) 9.0-0 0-0 10.Qc2 d4 11.ed4 (11.d3 Rb8+=) 11...cd4 12.d3 e5 13.Nbd2 Be6 (13...Rb8 14.Rb1 Rb1 15.Qb1–/+) 14.Re1 (14.Ng5 Bd7+=) 14...Nd7 (14...Qa5 15.Nb3 Qc3 16.Bd1+=) 15.Bf1 (15.Ne4 Rb8+=) 15...Qc7–/+ 16.g3 (16.Ne4 Rab8–/+) 16...f5 (16...Rab8 17.Ne4–/+) 17.Nb3+= Nc5 (17...Qd6 18.Bg2 Rac8 19.Ng5 Bg5 20.Bg5=) 18.Nc5= Bc5 19.Ng5 Bc8 (19...Rae8 20.Bg2 Bc8 21.Bd5 Kh8 22.Qd1=) 20.Bg2 h6 21.Bd5 Kh8 22.Qe2 Rf6 23.Qh5 Bb7 (better is 23...Bd7!?+/–) 24.Rb1 Rb8 25.Ne6 Qe7? (better is 25...Qa5 26.Bg5 Re6 27.Be6 Qc7+–) 26.Bg5 (worse is 26.Nc5 Qc5 27.Bg5 Rd6 28.Rb7 Rd5 29.Rb8 Nb8 30.cd5 Qd5 31.Qe8 Kh7 32.Re5 Qc6+–) 26...Ba7 (26...Qe6 27.Be6 Re6+–) 27.Bf6 Qf6 28.Rb7! Rb7 29.Qe8 Kh7 30.Nf8 Kh8 31.Ng6 Kh7 32.Bg8 1–0. Steffens – Van Zyl Smit, Hastings, 1995. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 c5)

5.b5 a6 6.Bb2 A) 6...Be7 7.Be2 ab5 8.Nc3 0-0 9.Nb5 c4 10.0-0+=; B) 6...ab5 7.Nc3 (7.Bb5 Bd7 8.Be2 Bd6 9.0-0 Nc6 10.Nc3+=) 7...b4 8.ab4 Ra1 9.Ba1 cb4 10.Nb5=; C) 6...Bd7 7.ba6 (7.Nc3 Bd6 8.ba6 ba6 9.Be2 e5 10.d4+=; 7.a4 Bd6 8.Be2 0-0 9.0-0 ab5 10.ab5+=) 7...Na6 8.Be5 Be7 9.Be2 0-0 10.0-0+=; D) 6...Bd6 7.Be5 (7.Be2 0-0 8.0-0 Nbd7 9.a4 e5 10.Nh4+=; 7.ba6 ba6 8.Be2 Nc6 9.c4 0-0 10.Qc2+=) 7...0-0 8.ba6 Na6 9.d4 Be5 10.Ne5+=.

5.b5 a6 6.Nc3 A) 6...d4 7.ed4 (7.Nb1 de3 8.fe3 Bd6 9.Nc3 e5 10.Bb2+=; 7.Na2 de3 8.fe3 Bd6 9.ba6 Na6 10.Bb5=) 7...cd4 8.Ne2 d3 9.Nc3 dc2 10.Qc2=; B) 6...Be7 7.Bb2 (7.ba6 ba6 8.Rb1 Nc6 9.Be2 e5 10.d4+=; 7.Be2 d4 8.ed4 cd4 9.Nb1 0-0 10.0-0+=) 7...0-0 8.Be2 d4 9.ed4 cd4 10.Na2=; C) 6...c4 7.ba6 (7.Bb2 Bd6 8.ba6 ba6 9.d3 cd3 10.Bd3=; 7.Rb1 Qa5 8.Bb2 Bd6 9.ba6 ba6 10.Qe2+=) 7...ba6 8.d3 cd3 9.cd3 Bd6 10.d4=; D) 6...Bd6 7.Be2 (7.ba6 ba6 8.Rb1 e5 9.d4 ed4 10.ed4+=; 7.Bb2 e5 8.ba6 ba6 9.Rb1 e4 10.Ng1+=) 7...e5 8.ba6 Na6 9.d4 e4 10.dc5+=.

5.b5 a6 6.Be2 A) 6...Bd6 7.Nc3 (7.Bb2 0-0 8.ba6 ba6 9.0-0 Nc6 10.c4+=; 7.ba6 Na6 8.Bb2 0-0 9.0-0 Nc7 10.Be5+=) 7...e5 8.ba6 Na6 9.d4 e4 10.dc5+=; B) 6...c4 7.ba6 Na6 8.d3 cd3 9.cd3 Bd7 10.0-0=; C) 6...ab5 7.Bb5 Bd7 8.Bd7 Nbd7 9.Nc3 Bd6 10.Rb1+=.

5.b5 a6 6.Ne5 A) 6...c4 7.ba6 Ra6 8.Bb2 Bd6 9.d3 b5 10.Ng4+=; B) 6...Nbd7 7.Bb2 (7.Nd7 Bd7 8.ba6 ba6 9.Bb2 Bd6 10.f4+=; 7.f4 Ne5 8.fe5 Nd7 9.Bb2 Qh4 10.g3–/+) 7...Bd6 8.f4 0-0 9.ba6 ba6 10.Be2+=; C) 6...Qc7 7.Bb2 (7.f4 c4 8.ba6 Ra6 9.Bb2 Nc6 10.Be2+=; 7.Nf3 e5 8.Bb2 Nbd7 9.c4 e4 10.Nh4+=) 7...c4 8.ba6 Ra6 9.f4 Nc6 10.Be2+=; D) 6...Bd6 7.d4 (7.f4 Ne4 8.ba6 Qh4 9.g3 Ng3 10.Nf3–+; 7.Bb2 0-0 8.f4 Ne4 9.Qg4 f6 10.Nf3–/+) 7...0-0 8.ba6 Na6 9.Nd2 Qc7 10.Bb2–/+.

5.b5 b6 6.Bb2 Bb7 7.c4 Nbd7 8.d4 Ne4 9.Bd3 Ndf6 10.Nc3 (10.0-0 Bd6=) 10...Nc3 (10...cd4!? 11.Nd4 Nc3 12.Bc3 dc4 13.Bc4 Qc7+=) 11.Bc3= Be7 12.0-0 0-0 13.Ne5 Bd6 14.Bb2 Qc7 15.f4 dc4 16.Nc4 Be4 17.Be2 (17.dc5!? Bd3 18.Qd3 Bc5 19.Bf6 gf6 20.f5+=) 17...Rac8 18.Rc1 Qd7 (18...Be7 19.Bd3=) 19.a4 (19.Nd6 Qd6 20.dc5 Qd1 21.Rfd1 Rc5 22.Rc5 bc5 23.Bf6 gf6+–) 19...Be7 20.Ne5 (20.dc5 Qd1 21.Rfd1 Bc5+=) 20...Qd5 21.Bc4 Qb7 22.Rf2 Rfd8 23.h3 Nd5 24.Qb3 f6 (24...Bd6!?=) 25.Nc6+= Rd7 26.g4 (better is 26.f5!?+/–) 26...Bf8= 27.f5 ef5 28.gf5 (better is 28.Rf4 Qc7 29.Kf1=) 28...Re8?? (better is 28...Qc7+=) 29.Rf4+– Kh8? (better is 29...Qc7 30.Ne5! fe5 31.Re4 Qd8 32.dc5 Bc5 33.Bd5 Kh8+–) 30.Re4! Re4 31.Bd5 Rh4 32.e4 Qc7 33.e5 cd4 34.Be6 d3 35.Bd7 Bc5 36.Kg2 Qd7 37.ef6 (37.ef6 Rd4 38.Nd4 gf6 39.Qd3+–) 1–0. Romero Jaime,Pedro (1735) – Farinas Lucas,Juan Antonio (1770), Madrid Low cost Cup, 2009. (=1.Nf3 Nf6 2.b4 d5 3.e3 e6 4.a3 c5)

5.b5 Bd6 6.d4 Nbd7 7.Bb2 Qc7 8.c4 dc4 (8...cd4 9.Nd4 0-0 10.Nd2=) 9.Qc2 (9.Nbd2 0-0=) 9...b6 (9...cd4 10.Nd4 a6 11.ba6 ba6 12.Nd2=) 10.Nbd2 cd4 11.Bd4 (11.Qc4 Instead of 11...de3 12.fe3 0-0–/+) 11...Bb7 12.Nc4 0-0 13.Be2 Bd5 (13...Rac8 14.Qb2+=) 14.Qa4 (14.Qb2 Bc5=) 14...Bc5 15.0-0 Bd4 16.ed4 White has an active position 16...Rfc8 17.Rac1 Ne4 18.Rc2 f6 Prevents intrusion on e5 (18...Qf4 19.g3 Qf6 20.Rfc1=) 19.Qb4 Qd8 Black has a cramped position 20.Rfc1 Qf8 21.Ne3 Rc2 22.Qf8 Kf8 23.Rc2 Ke7 24.Nd5 ed5 25.Ne1 Kd8 26.Nd3 Rc8 27.Rc8 Kc8 A minor pieces endgame occured 28.Nb4 White threatens to win material: Nb4xd5 28...Nc3 Black threatens to win material: Nc3xe2 29.Bd3 White threatens to win material: Bd3xh7 29...Kc7 30.f3 Controls e4 30...Kd6 31.Kf2 Nd1? (better is 31...Nf8= would keep Black in the game) 32.Ke2+/– Nb2 33.Bh7 Nf8 34.Bf5 (34.Bg8!? Nc4 35.a4+/–) 34...g6 35.Bb1 (35.Bd3!?+=) 35...Ne6= 36.Kd2 Nc4 37.Kc3 g5 (37...Na3 38.Bd3=) 38.a4 Ne3 39.g3 Covers f4 39...Nf1 Black threatens to win material: Nf1xh2 40.Bd3 White threatens to win material: Bd3xf1 40...Nh2 41.Be2 g4 42.fg4 Ng5 43.Kd3 Ne4 Black threatens to win material: Ne4xg3 44.Ke3 Ng3 (44...Nc3 45.Kf2=) 45.Bd1 Ne4 46.Kf4 Nf1 47.Bb3 Attacks the isolani on d5. White threatens to win material: Bb3xd5 (%cal Rb3d5 47...Nc3 48.Bc2 (48.Kf5!?= is interesting) 48...Ne2–/+ 49.Kf5 Ne3 50.Kf6 Ng4 51.Kg5 Ne3 52.Bd3 Nd4 53.Kf4 Nc4 (better is 53...Nd1–/+) 54.Bf1? (better is 54.Bc4 would keep White alive 54...dc4 55.Ke4+=) 54...Ne6–+ 55.Kf5?? White has lost his nerve... understandable when you consider his position (better is 55.Kg3–+) 55...Ne3 56.Kf6 (56.Kg6 does not help much 56...Nf1 57.Kh5 Nc5–+) 56...Nf1 0–1. Izquierdo,Daniel (2285) – Belistri,Ubaldo (2060), URU–ch playoff, 2001. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 c5)

5.c3 a6 6.Be2 Nc6 7.Bb2 cb4 8.cb4 Be7 9.0-0 0-0 10.d4 Bd7 11.Nc3 Rc8 12.Rc1 Ne4 13.Bd3 f5= 14.Nd2 Bf6 15.f3 Nd2 16.Qd2= h6 17.Qf2 Ne7 18.Ne2+= b5 19.Qg3 Kh8 20.Nf4+/– Bg5 21.e4?? Bf4–+ 22.Qf4 fe4 23.Qh4 ed3 24.g4 Ng6 25.Qg3 Nf4 26.Kh1 Ne2 27.Qe5 Nc1 28.Bc1 Qf6 (28...Qf6 29.Qe3 Rc4–+; better is 28...Rf3! 29.Rg1–+) 0–1. alaamattar (2135) – pushtiu (2290), net–chess.com, 2006.

5.c3 cb4 6.ab4= Nc6 (6...Bd6 7.Na3=) 7.Bb5 (7.b5 Ne7=) 7...Bd6 8.0-0 (8.Be2 a6=) 8...0-0 (8...e5 9.d3+=) 9.Ba3 (9.d4 Qc7=) 9...e5+= 10.Bc6 (10.Ba4 e4 11.b5 ef3 12.bc6 fg2 13.Kg2 Ba3 14.Na3 Qe7+=) 10...bc6–/+ 11.b5 (11.d3 Qc7 12.h3 Rd8–/+) 11...cb5 12.Ne5 (better is 12.d4!? e4 13.Ne5–/+) 12...Be5–+ 13.Bf8 Qf8 14.d4 (14.Qc2 a5–+) 14...Bc7 15.Na3 (15.Qd3 Qd6 16.g3 Qc6–+) 15...Qd6 16.g3 Bh3 (16...Qc6 17.Qd3 a6 18.f3–+) 17.Re1? (17.Nb5 Qd7 18.Nc7 Qc7–+) 17...a6?? (17...Qc6 18.Qb3 a6 19.Nc2–+) 18.Qf3? (better is 18.Nb5 Qc6 19.Nc7 Qc7 20.Qd3–/+) 18...Re8 (18...Rc8 19.Qe2–+) 19.Nc2 (19.Nb1 Qc6–+) 19...Ne4 20.Nb4 (20.Ra3 Nd2 21.Qe2 Nc4–+) 20...a5 (20...Nc3?! 21.Na6 Bd8 22.g4–+) 21.Nc2 (21.Na2 Ng5 22.Qe2 Qg6–+) 21...Nc3 22.Qh5 (22.Rac1 Re4–+) 22...Bc8 (22...Qe6!? 23.f3 Qf5 24.Qf5 Bf5 25.e4 de4 26.g4–+) 23.Kg2 (23.Na3 Re4 24.f3 Re6–+) 23...g6 (23...g6 24.Qg5 b4–+) 0–1. Bitterling,Max (2035) – Oi_sin,Kim (2015), remoteschach.de, 2004. (=1.Nf3 Nf6 2.e3 e6 3.a3 d5 4.b4 c5)

5.c3 Bd6 6.bc5 Bc5 7.d4 Bd6 8.c4 0-0 9.cd5 (9.Nbd2 Nc6=) 9...ed5 10.Bd3 Bg4 11.h3 Bh5 (11...Be6 12.0-0=) 12.Nc3 Nbd7 (12...Nc6 13.Rb1=) 13.0-0 (13.Qb3 Bf3 14.gf3 Nb6=) 13...Rc8 14.Bb2 (14.Bd2 Re8=) 14...Nb6 15.Bf5 Rc6 16.Nb5 Bb8 17.Qb3 (17.Qe2 Bf3 18.gf3 a6–+) 17...Bf3–/+ 18.gf3 Nc4 (18...Nc4 19.Bc3 a6–+) 0–1. Frysiak,Adam – Buczinski,Henryk, corr 2AMM, Poland, 1993.

5.c3 Nbd7 6.bc5 Nc5 7.d4+=.

5.c4 cb4 6.ab4 Bb4 7.Qa4 Nc6 8.Nd4 Qb6 9.cd5 Nd5 10.Bb5 Bd7 11.Bb2 a6 (11...0-0 12.Nc3–/+) 12.0-0 0-0 13.Bc6 Bc6 14.Nc6 bc6 15.Qb3 (15.Qc2 Bd6–/+) 15...Bd6 16.Qb6 Nb6 17.d3 Rfd8 18.Ba3 a5 (18...c5 19.Nc3–+) 19.Rc1 (19.d4 Ba3 20.Na3 Nd7–/+) 19...Ba3 (19...c5!?–+) 20.Ra3–/+ Rd6 21.Nd2 f5 22.Nf3 (22.d4 e5 23.Nf3 ed4 24.Nd4 g6+=) 22...Nd7–/+ 23.Kf1 c5 24.Nd2 a4 25.Ke2 Nb6 (better is 25...Rb6!?–/+) 26.Rc5= Kf7 27.Nc4 Nc4 28.Rc4 Attacks the isolani on a4 28...Rda6 29.f3 R6a7 30.h4 h5 31.e4 Kf6 32.Ke3 g5 (32...fe4 33.de4 g5 34.e5 Ke5 35.hg5=) 33.hg5 (33.ef5!? Kf5 34.Rc5 e5 35.d4+=) 33...Kg5= 34.d4 f4 35.Kd3 Ra5 36.Rc5 Kf6 37.Kc4 Rc5 38.dc5 Ke7 (38...Ke5 39.Kb5 Rb8 40.Ka5=) 39.Kb5+= Rg8 40.Ra2 Kd7 (better is 40...a3+=) 41.Ka4 (better is 41.Rd2 Kc7 42.Ka4+/–) 41...Ra8+= 42.Kb3 Ra2 43.Ka2 Kc6 44.Kb3 Kc5 45.Kc3 e5 46.Kd3 Kb4 47.Kd2 Kc4 48.Kc2 Kd4 49.Kd2 h4 50.Ke2 Kc3 51.Ke1 Kd3 52.Kd1 Ke3 53.Ke1 h3! 54.gh3 (54.gh3 Kf3 Deflection) 54...Kf3 55.h4 Ke4 (55...Ke4 56.h5 Kf5–+) 0–1. Martinez Fabra,AJ – Camarasa Escutia,JB, Alzira op, 1995. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 c5)

5.c4 dc4 6.Bc4 cb4=+ 7.ab4 Bd7 8.Ba3 a6 9.0-0 Be7 10.d4 b5= 11.Bb3 Nc6 12.Qd2 0-0 13.e4? Ne4–+ 14.Qe1 Nf6 15.Ra2 a5 16.ba5 Ba3 17.Ra3–/+ b4 18.Ra1 Ra5 19.Ra5 Qa5 20.Qe3 Ne7 21.Nbd2 Ned5 22.Qe5 Rc8 23.h4 Qa3 24.h5 h6 25.g3 Ba4 26.Bd5 Nd5 27.g4 b3 28.g5 hg5 29.Qg5 f6 30.Qg4–/+ Qe7 31.h6 g5 32.Kg2? Nf4–+ 33.Kg3 Rc3 34.Ne4 Bc6?? 35.Re1?? Rd3 36.Kh2 Be4 37.Re4 f5 38.Qg5 Qg5 39.Ng5 fe4 (39...fe4 40.Kh1 b2 41.h7 Kh8 42.Nf7 Kh7 43.Ng5 Kg6 44.d5 b1Q 45.Kh2 Qf1 46.Ne4 Qg2) 0–1. alaamattar (2190) – agostinhoarruda (2330), net–chess.com, 2006.

5.Be2 cb4 6.ab4 Bb4 7.0-0 0-0 8.c3 Bd6 9.Re1 Nc6 10.d4 Re8 11.Bd3 e5 12.de5 Be5 13.Bb2 Bg4 14.h3 Bf3 15.Qf3 Bc7 16.Nd2 Qd6 17.e4?? (17.Bf5–+) 17...Rad8 (17...Qh2 18.Kf1 Ne5 19.Qe3–+) 18.c4? (18.Nf1 Ne5 (18...Ne4?! 19.c4–/+) 19.Qe2 Nd3 20.Qd3 Ne4–+) 18...de4 (better is 18...Qh2 19.Kf1 Be5 20.cd5 Bb2 21.dc6 Ba1 22.Nb3–+) 19.Ne4 Ne4 (better is 19...Qh2 20.Kf1 Be5 21.Be5 Ne5 (21...Qe5?! 22.Nf6 Qf6 23.Qf6 Re1 24.Re1 gf6 25.Be4=; 21...Re5?! 22.Ng3–+) 22.Nf6 gf6 23.Qg3 Qg3 24.fg3 Rd3 25.Ra7 b6–+) 20.Be4–/+ Ne5 21.Qh5 Ng6 22.g3 b6 23.Ra7= Qd2 24.Rd1?? Qb2 25.Rd8?? Bd8–+ 26.Bg6 hg6 27.Qf3 Qc1 28.Kg2 Qc4 29.h4 Re1 30.Kh3 b5 31.g4 Qf1 32.Kh2 Qg1 33.Kh3 Qh1 34.Qh1 Rh1 35.Kg3 Bh4 36.Kg2 Rb1 37.Ra8 Kh7 38.Kh3 Bf2 39.Rb8 b4 40.Rb5 b3 41.Kg2 Bd4 0–1. pieeater – delightful_porridge, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.a3 c5 4.e3 Nf6)

6.c4 0-0 7.Nc3 Nc6 8.Be2 (8.d4!? Be7 9.Qc2=) 8...dc4+= 9.Bc4 a6 10.d4 Ba7 11.a4 Qc7 12.Qe2 Na5 13.Nd2 e5 14.0-0? (better is 14.de5 Bg4 15.Qf1 Qe5 16.Bb2+=) 14...ed4–+ 15.ed4 Bd4 16.Bb2 Bg4 17.Qd3 Rad8 18.Nd5 Rd5 (worse is 18...Bb2 19.Nc7 Rd3 20.Bd3–+) 19.Bd5 Bb2 20.Rab1 Be5 (20...Qc3 21.Be4–+) 21.h3 Bh5 (21...Rd8!? 22.hg4 Rd5 23.Qe2–+) 22.Rfc1 Qd8 23.Be4 Bf4 24.Rc2 Ne4 25.Qd8 Rd8 26.Ne4 Bg6 27.f3 Be3 28.Kf1 f5 29.Re1 fe4 30.Re3 ef3 31.Rc7 fg2 32.Kg2 Re8 33.Rg3 Re4 34.Rf3 h6 35.Rc8 Re8 36.Re8 Be8 37.Rf4 g5 38.Rd4 Kf7 0–1. roy1nc6 (1900) – xenophon98 (1865), gameknot.com, 2013. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 c5)

6.Bd3 0-0 7.0-0 Nc6 8.Bb2 Re8 9.Nc3 Bd7 10.Be2 Rc8 11.d4 Be7 12.Ne5 Ne5 13.de5= Ne4 14.Ne4 de4 15.c4 b6 16.Qc2 Bc6 17.Rad1 Qc7 18.Rd2 Red8 19.Rd8 Qd8 20.Rd1 Qf8 21.a4 Qe8 22.Rb1 Bc5 23.Bc3 Ba4 24.Qe4 Bc6 25.Qc2 Kh8 26.Bd4= Be7 27.Bd3 Rc7 28.f4 h6 29.Qf2 Qc8 30.Ra1 Qb8 31.Rd1 Bb4 32.e4 Rd7 33.Bc2 Qd8–+ 34.Rd3? Be4 35.Bb6 ab6 36.Rd7 Qd7 37.Qb6 Bc2 38.h4 Qd2 39.Qf2 Qc1 40.Kh2 Be4 41.f5 Bc3 42.Qg1 Be5 (42...Be5 43.g3 Qc2 44.Kh3 Bf5 45.g4 Bg4 46.Kg4 Qf5#) 0–1. glc209_wb – TCB, computer chess game, 2000.

6.d4 Bb6 7.Nbd2 (7.Bd3 Ba5 A) 8.Bd2 Bc7 (8...0-0 9.0-0 Bc7 10.Bb4 Re8 11.Ne5 Nc6 12.f4 Nb4 13.ab4 Ne4+=) 9.0-0 Nc6 10.Bb4 Nb4 11.ab4 0-0 12.Nbd2 a6 13.Qe2 Bd7=; B) 8.Nbd2 Bc3 (8...0-0 9.0-0 Bc3 10.Rb1 b6 11.e4 Ba6 12.Ba6 Na6 13.e5 Ne4+=; 8...Nc6 9.0-0 Bc3 10.Rb1 0-0 11.Rb3 Ba5 12.Bb2 b6 13.Qe2 Bd7+=) 9.Rb1 0-0 10.0-0 Nc6 11.Bb2 Bb2 12.Rb2 b6 13.Ne5 Qd6+=) 7...0-0 (7...Ba5 8.c4 (8.Bb5 Nbd7 9.0-0 Bc3 10.Rb1 Qa5 11.e4 de4 12.Ng5 Bd2 13.Bd2 Qc7=) 8...0-0 9.Bd3 dc4 10.Bc4 a6 11.a4 Bd7 12.0-0 Bc3 13.Ra2 Nc6+=) 8.Bd3 Nc6 (8...Ba5 9.Bb2 Ne4 10.0-0 f5 11.Nb3 Bc7 12.Ne5 Nd7 13.f3 Nd6=; 8...Bc7 9.0-0 Nbd7 10.Rb1 Qe7 11.Re1 b6 12.e4 de4 13.Ne4 Bb7=; 8...Nbd7 9.c4 Bc7 10.0-0 dc4 11.Nc4 b5 12.Nce5 Bb7 13.Bb2 a6=) 9.Bb2 (9.0-0 Ng4 10.c4 Bc7 11.h3 Nf6 12.Bb2 Rb8 13.Qc2 Bd7+=) 9...Rb8 (9...Bc7 10.0-0 Nd7 11.c4 f5 12.cd5 ed5 13.Qb3 Nf6+=) 10.0-0 Re8 (10...Ng4 11.h3 Nh6 12.c4 f5 13.Qb3 Bc7+=) 11.Rc1 (11.Ne5 Nd7 12.f4 f5 13.Qf3 Nde5+=) 11...e5 (better is 11...Bc7!?+= 12.Ne5 Ne7 13.Qf3 b5+=) 12.Ne5+/– (12.de5 Ng4 13.h3 Nh6+/–) 12...Ne5 (12...Bc7 13.Ndf3 Ng4+/–) 13.de5 Nd7 (13...Bg4+/–). Jaeger,Erich (2015) – Pieleck,Rudi (1770), remoteschach.de, 2008.

6.d4 Be7 7.Nc3 A) 7...h6 A1) 8.Bd3 0-0 (8...Nc6 9.0-0 0-0 10.h3 Re8 11.Bd2 a6 12.Qe2 b6 13.e4 de4; 8...Bd7 9.0-0 0-0 10.Bd2 Nc6 11.e4 de4 12.Ne4 Qc7 13.Re1 a6; 8...a6 9.e4 Nc6 10.e5 Nd7 11.0-0 0-0 12.h3 Qc7 13.Qd2 f6) 9.Bb2 Nc6 10.0-0 Bd7 11.Ne5 Rc8 12.Qf3 Qc7 13.Nb5 Ne5; A2) 8.Bd2 a6 (8...Nc6 9.Bd3 0-0 10.0-0 b6 11.Ne5 Bb7 12.f4 a6 13.Qf3 Qc7; 8...0-0 9.Bd3 Nc6 10.0-0 a6 11.Ne5 Ne5 12.de5 Nd7 13.f4 Nc5; 8...a5 9.Bd3 Nc6 10.0-0 0-0 11.Nb5 Bd7 12.c4 Ne4 13.Nc3 Nd2; 8...Bd7 9.Bd3 Nc6 10.e4 0-0 11.0-0 de4 12.Ne4 Qc7 13.Re1 a6) 9.Bd3 Nc6 10.0-0 0-0 11.h3 b5 12.Ne5 Bb7 13.Nc6 Bc6; A3) 8.h3 a6 (8...Nc6 9.Bd3 b6 10.0-0 Bb7 11.Bb2 0-0 12.Re1 Na5 13.Ne5 Nc6; 8...0-0 9.Bd3 Bd7 10.0-0 Nc6 11.Bd2 Qc7 12.e4 de4 13.Ne4 a6; 8...Bd7 9.Bd3 Nc6 10.Bd2 0-0 11.0-0 Re8 12.Qe2 Bc8 13.Ne5 Ne5; 8...Bd6 9.Bd3 Nc6 10.e4 Bc7 11.e5 Ba5 12.Bd2 Bc3 13.Bc3 Ne4) 9.Bd3 Nc6 10.0-0 0-0 11.e4 de4 12.Be4 Ne4 13.Ne4 Qc7; A4) 8.Bb2 Qb6 (8...Bd7 9.Bd3 Nc6 10.0-0 0-0 11.Ne5 Rc8 12.Qf3 Qc7 13.Nb5 Ne5; 8...0-0 9.Bd3 Nc6 10.0-0 Bd7 11.Ne5 Rc8 12.Qf3 Qc7 13.Nb5 Ne5; 8...Nc6 9.Bd3 0-0 10.0-0 Bd7 11.Ne5 Rc8 12.h3 a6 13.Qf3 Qc7; 8...Qa5 9.Bd3 Nc6 10.0-0 0-0 11.Ne5 a6 12.f4 Qc7 13.Rf3 h5) 9.Bd3 Nc6 10.Rb1 0-0 11.0-0 Rd8 12.Qd2 Qa5 13.e4 de4; B) 7...0-0 B1) 8.g3 Qc7 (8...Bd7 9.Bd3 Nc6 10.0-0 Qc7 11.Bd2 a6 12.e4 g6 13.e5 Nh5; 8...Nc6 9.Bd3 b6 10.0-0 Bb7 11.Bb2 Qd7 12.Re1 Ng4 13.h3 Nf6; 8...a6 9.Bd3 Nc6 10.0-0 b5 11.Bb2 Bb7 12.Re1 g6 13.e4 de4; 8...h6 9.Bd3 Nc6 10.0-0 a6 11.Bb2 Qb6 12.Rb1 Bd7 13.Qd2 Qc7) 9.Nb5 Qb6 10.Bd3 a6 11.Nc3 Nc6 12.0-0 h6 13.Bd2 Rd8; B2) 8.Bb2 Nc6 (8...Bd7 9.Bd3 Nc6 10.0-0 Re8 11.Ne5 a6 12.Qf3 Rc8 13.h3 Qc7; 8...Qa5 9.Bd3 Nc6 10.0-0 Rd8 11.e4 Bd7 12.h3 Nh5 13.Qc1 f5; 8...Qb6 9.Bd3 Nc6 10.0-0 Ne4 11.Na4 Qa5 12.c4 Bd7 13.cd5 ed5; 8...a6 9.Bd3 Nc6 10.0-0 g6 11.Qd2 Bd7 12.e4 Qa5 13.e5 Nh5) 9.Bd3 Bd7 10.0-0 a6 11.Qd2 Qa5 12.e4 Ne4 13.Ne4 de4; B3) 8.Bd3 a6 (8...Nc6 9.0-0 a6 10.Bd2 b5 11.Ne5 Bb7 12.f4 Qb6 13.Qf3 g6; 8...Qc7 9.Nb5 Qb6 10.c4 dc4 11.Bc4 Bd7 12.Rb1 a6 13.Nc3 Qc6; 8...Re8 9.0-0 Nc6 10.Bd2 a6 11.h3 b5 12.Qb1 Bb7 13.Qb3 h6; 8...h6 9.0-0 Nc6 10.Bb2 Bd7 11.Ne5 Rc8 12.Qf3 Qc7 13.Nb5 Ne5) 9.0-0 Nc6 10.h3 Qc7 11.Bd2 e5 12.Ne5 Ne5 13.de5 Qe5; C) 7...Nc6 C1) 8.h3 Qc7 (8...0-0 9.Bd3 Qc7 10.Bd2 a6 11.0-0 Rd8 12.Qb1 b5 13.Qb2 Bb7; 8...a6 9.Bd3 0-0 10.0-0 Qc7 11.Bd2 Rd8 12.a4 h6 13.Rb1 b6; 8...g6 9.Bd3 0-0 10.0-0 Re8 11.Re1 a6 12.e4 de4 13.Be4 Qc7; 8...Qb6 9.Bd3 0-0 10.0-0 h6 11.Rb1 Qc7 12.Qd2 b6 13.Re1 Rd8) 9.Bd2 Ne4 10.Bd3 Nd2 11.Qd2 0-0 12.0-0 Qa5 13.e4 Re8; C2) 8.Bd2 Ne4 (8...0-0 9.Bd3 b6 10.0-0 Bb7 11.h3 Rc8 12.Qb1 h6 13.Re1 Qd7; 8...b6 9.Bd3 0-0 10.0-0 Bb7 11.Qb1 h6 12.Qb3 Qd7 13.Rfe1 Rac8; 8...a6 9.Bd3 0-0 10.0-0 b5 11.Ne5 Bb7 12.f4 Qc7 13.Qf3 g6; 8...Qc7 9.Bd3 0-0 10.h3 a6 11.0-0 Rd8 12.a4 h6 13.Rb1 b6) 9.Bd3 f5 10.0-0 0-0 11.h3 a6 12.Ne2 Qc7 13.Nf4 g5; C3) 8.Bb2 Bd7 (8...Qb6 9.Bd3 0-0 10.Rb1 Qc7 11.0-0 a6 12.e4 b5 13.Qd2 de4; 8...0-0 9.Bd3 Qc7 10.0-0 Bd7 11.Qd2 h6 12.Rab1 a6 13.e4 de4; 8...Qa5 9.Bd3 0-0 10.0-0 a6 11.e4 de4 12.Ne4 Bd7 13.Qe1 Qe1; 8...h6 9.Bd3 0-0 10.0-0 a6 11.Qd2 Bd7 12.e4 b5 13.h3 de4) 9.Bd3 Qb6 10.Rb1 0-0 11.Ne5 Qc7 12.Nd7 Qd7 13.0-0 g6; C4) 8.Bd3 h6 (8...0-0 9.0-0 Qc7 10.Bd2 a6 11.Qb1 h6 12.Qb2 b5 13.e4 Bb7; 8...a6 9.0-0 0-0 10.Bd2 b5 11.Ne5 Bb7 12.f4 Qc7 13.Qf3 g6; 8...Rb8 9.0-0 0-0 10.Bd2 h6 11.Qe2 b6 12.Ne5 Bb7 13.f4 Qc8; 8...Qc7 9.Nb5 Qb8 10.c4 0-0 11.0-0 dc4 12.Bc4 Bd7 13.Bb2 a6) 9.0-0 0-0 10.h3 Qb6 11.Bd2 a6 12.Rb1 Qc7 13.a4 Rd8.

6.d4 Be7 7.c4 0-0 8.Nc3 (8.Bd2 Nc6 (8...Ne4 9.Bd3 Nc6 10.0-0 Nd2 11.Nbd2 Qd6 12.Qb3 Bd7 13.Rfc1 b6; 8...Qc7 9.cd5 ed5 10.Nc3 Nc6 11.Bd3 h6 12.0-0 Be6 13.Nb5 Qb8) 9.Nc3 Ne4 10.Bd3 Nd2 11.Nd2 e5 12.cd5 ed4 13.ed4 Nd4; 8.cd5 ed5 (8...Nd5 9.e4 Nf6 10.Nc3 Qc7 11.Bd2 Nc6 12.Bd3 Rd8 13.0-0 h6; 8...Bd6 9.de6 Be6 10.Nc3 Nc6 11.Bd3 Na5 12.0-0 Rc8 13.Nb5 Bb8; 8...Qc7 9.Bd2 ed5 10.Nc3 Bf5 11.Qb3 Rd8 12.Nb5 Qc8 13.Bd3 Nc6; 8...h6 9.de6 Be6 10.Nc3 Nc6 11.Bd3 Rc8 12.Bd2 a6 13.0-0 b5) 9.Bd3 Qc7 10.Bb2 Nc6 11.Nc3 Be6 12.0-0 h6 13.Rc1 Rac8) 8...b6 (8...Ne4 9.Qc2 Qa5 10.Bb2 f5 11.Be2 Nc6 12.0-0 Bd7 13.cd5 Nc3; 8...Bd7 9.cd5 ed5 10.Bd3 Nc6 11.0-0 Rc8 12.Bd2 g6 13.Ne5 Be6; 8...Nc6 9.cd5 ed5 10.Bd3 Be6 11.0-0 Rc8 12.Bb2 Bd6 13.Rc1 a6; 8...Qc7 9.Nb5 Qb6 10.c5 Qd8 11.Bd3 b6 12.cb6 ab6 13.0-0 Nc6; 8...h6 9.Bd3 Nc6 10.0-0 dc4 11.Bc4 Bd7 12.Bd2 a6 13.Bd3 Qc7) 9.cd5 (9.Bb2 Bb7 10.cd5 Nd5 11.Bd3 Nc6 12.0-0 Rc8 13.Rc1 g6) 9...ed5 (9...Nd5 10.Bb2 Ba6 11.Ba6 Na6 12.Qd3 Nc3 13.Bc3 Rc8) 10.Bd3 Bb7 (10...Re8 11.Qa4= (11.Bb2 Nc6 12.0-0 Bd6 13.Rc1 Bb7) 11...Bb7 12.0-0 Nc6 13.Bb2 Qd7; 10...Nc6 11.0-0 Bg4 12.h3 Bh5 13.Bb2 Qd7) 11.0-0 Nbd7 (11...Nc6 12.Bb2 Qd7 13.Rc1 Rac8) 12.Ne5 (12.Bd2 Rc8+= (12...Ne4 13.Qb3 Nd2) 13.Qb3 a6; 12.Qb3 Rc8 13.Bb2 a6) 12...Ne5 (12...Ne4 13.Bb2 Rc8) 13.de5 Ne4 (13...Nd7+=) 14.Bb2 Rc8 15.Ne2 (15.Nb5 a6 16.Nd4 b5=) 15...Re8 16.Nf4 Bf8 (16...a6 17.Qg4 b5 18.Rfd1+=) 17.Qg4+= Qg5 18.Qh3 g6 (18...Bc5 19.e6 f6 20.Rfd1=) 19.e6 f5 20.Bb5 Re7 21.Rad1 Rc2 22.Ba1 Nc3?? (22...Ra2 23.Bd4=) 23.Bc3?? (better is 23.Bd3 Nd1 24.Bc2 Nf2 25.Rf2+–) 23...Rc3= 24.Rd5?? (better is 24.Nd5 Bd5 25.Rd5 Ra3 26.Rd7=) 24...Qf4!!–+ 25.Rd7 (25.ef4 Rh3) 25...Qe5 26.Qh4 Qe6 (26...Qb5? 27.Re7 Be7 28.Qe7+–) 27.Qd4 (27.Rd4 Rec7–+ (27...Ra3?! 28.Bc4 Qc4 29.Rc4=)) 27...Qe4 (27...Qe4 28.Qe4 Be4 (28...Re4?! 29.Rb7 Ra3 30.Rc1–/+) 29.Re7 Be7–+; 27...Ra3?? 28.Bc4 Qf7 29.Bf7 Kf7 30.Rb7 Rb7 31.Qd5 Kf6 32.Qb7+–) 0–1. Elorta,David (2360) – Bagamasbad,Efren (2255), 1st Campomanes Memorial Cup Open, Manila, 2010. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 c5 5.bc5 Bc5)

6.d4 Be7 7.c4 Nc6 A) 8.cd5 Nd5 (8...ed5 9.Bd3 Be6 10.Nc3 0-0 11.0-0 Rc8 12.Bb2 Bd6 13.Rc1 a6) 9.Bd2 0-0 10.Nc3 Qc7 11.Nd5 ed5 12.Bd3 Bg4 13.0-0 f5; B) 8.Nc3 Ne4 (8...0-0 9.Bd3 dc4 10.Bc4 Qc7 11.Nb5 Qd7 12.0-0 a6 13.Nc3 b5; 8...Bd7 9.cd5 ed5 10.Bd3 0-0 11.0-0 Rc8 12.Bd2 h6 13.Ne5 Ne5; 8...Qc7 9.cd5 ed5 10.Bd3 Nd4 11.Qa4 Nc6 12.Bd2 0-0 13.0-0 Be6; 8...a6 9.Bd3 dc4 10.Bc4 b5 11.Bd3 0-0 12.0-0 Bb7 13.Bb2 Rc8) 9.Qc2 Qa5 10.Bb2 0-0 11.Bd3 f5 12.0-0 Rf7 13.cd5 ed5; C) 8.Bd2 0-0 (8...Qb6 9.Nc3 0-0 10.Bd3 dc4 11.Bc4 a6 12.0-0 Bd7 13.Bd3 Rfc8; 8...b6 9.Nc3 Bb7 10.Bd3 Rc8 11.Qa4 dc4 12.Bc4 0-0 13.0-0 Na5) 9.Nc3 Ne4 10.Bd3 Nd2 11.Nd2 e5 12.cd5 ed4 13.ed4 Nd4; D) 8.Bd3 0-0 (8...dc4 9.Bc4 Bd7 10.0-0 Rc8 11.Bd3 0-0 12.Nbd2 Qa5 13.Bb2 Rc7; 8...Qa5 9.Bd2 Qc7 10.cd5 ed5 11.Nc3 0-0 12.0-0 h6 13.Qb3 Be6) 9.Nc3 dc4 10.Bc4 Qc7 11.Nb5 Qd7 12.0-0 a6 13.Nc3 b5.

6.d4 Be7 7.c4 h6 A) 8.Nc3 Nc6 (8...0-0 9.Bd3 dc4 10.Bc4 Qc7 11.Qd3 Bd7 12.Bb2 Rc8 13.Ba2 Ba3) 9.Bd3 0-0 10.0-0 dc4 11.Bc4 Bd7 12.Bd2 Rc8 13.Bd3 Qc7; B) 8.cd5 ed5 (8...Qc7 9.Bb5 Bd7 10.Bd7 Nbd7 11.de6 fe6 12.Bd2 Kf7 13.Nc3 Qc4; 8...0-0 9.de6 Be6 10.Nc3 Qa5 11.Bd2 Rc8 12.Nb5 Qd8 13.Bd3 Nbd7) 9.Nc3 0-0 10.Bd3 Nc6 11.0-0 Be6 12.Bb2 Rc8 13.Rc1 Bd6; C) 8.Bd2 0-0 (8...Nc6 9.Nc3 0-0 10.Bd3 dc4 11.Bc4 a6 12.Qc2 b5 13.Bd3 Bb7; 8...Bd7 9.Nc3 Nc6 10.Bd3 0-0 11.0-0 Rc8 12.cd5 ed5 13.h3 Be6; 8...a6 9.cd5 ed5 10.Nc3 0-0 11.Bd3 Nc6 12.0-0 Be6 13.Qb1 Qd6; 8...Ne4 9.Nc3 Nc6 10.Bd3 Nd2 11.Qd2 Na5 12.Qe2 dc4 13.Bc4 Nc4) 9.Nc3 Nc6 10.Bd3 dc4 11.Bc4 a6 12.0-0 b5 13.Bd3 e5; D) 8.Bd3 dc4 (8...0-0 9.Nc3 Nc6 10.Bd2 dc4 11.Bc4 a6 12.0-0 b5 13.Bd3 e5; 8...Nc6 9.0-0 dc4 10.Bc4 Bd7 11.Bd2 Qc7 12.Bd3 0-0 13.Nc3 Rac8; 8...Bd7 9.Nc3 Nc6 10.cd5 ed5 11.0-0 0-0 12.Rb1 Rb8 13.Bb2 Bg4) 9.Bc4 Qc7 10.Nbd2 Nc6 11.0-0 0-0 12.Bb2 Bd7 13.Bd3 Nd5.

6.d4 Be7 7.Bd3 A) 7...Nc6 A1) 8.Nc3 a6 (8...0-0 9.0-0 a6 10.h3 Qc7 11.Qd2 b5 12.Bb2 Na5 13.Ne5 Nc4; 8...h6 9.0-0 0-0 10.h3 b6 11.Bb2 Bb7 12.Re1 Na5 13.Ne5 Nc6; 8...b6 9.0-0 0-0 10.Bb2 Bb7 11.e4 Qd7 12.Re1 de4 13.Ne4 Ne4; 8...Qc7 9.Nb5 Qd7 10.Ne5 Ne5 11.de5 Ne4 12.f3 Nc5 13.0-0 0-0) 9.0-0 0-0 10.Bb2 Qb6 11.Rb1 Qa5 12.e4 b5 13.Qe1 Re8; A2) 8.0-0 0-0 (8...Bd7 9.Nc3 0-0 10.h3 Qc7 11.Bd2 a6 12.e4 de4 13.Ne4 b5; 8...Qc7 9.Nc3 0-0 10.Bd2 a6 11.Qb1 Rd8 12.Qb2 b5 13.e4 de4; 8...Rb8 9.c4 dc4 10.Bc4 Bd7 11.Bd3 Rc8 12.Bd2 0-0 13.Nc3 Qc7; 8...a6 9.c4 dc4 10.Bc4 b5 11.Bd3 Bb7 12.Nc3 0-0 13.Bb2 Rc8) 9.Nc3 Qc7 10.Bd2 a6 11.Qb1 Rd8 12.Qb2 h6 13.a4 Bd7; A3) 8.Bd2 h6 (8...a6 9.Nc3 0-0 10.0-0 b5 11.Ne5 Bb7 12.f4 Qc7 13.Qf3 g6; 8...0-0 9.Nc3 a6 10.0-0 b5 11.Ne5 Bb7 12.f4 Qc7 13.Qf3 g6; 8...b6 9.0-0 0-0 10.Nc3 Bb7 11.h3 Rc8 12.Nb5 h6 13.Nc3 a6; 8...Bd7 9.0-0 0-0 10.Nc3 h6 11.e4 de4 12.Ne4 Qc7 13.h3 Ne4) 9.0-0 0-0 10.Nc3 a6 11.Ne5 Bd6 12.f4 Bd7 13.Rf3 Qe7; A4) 8.c4 dc4 (8...Bd7 9.cd5 ed5 10.Nc3 0-0 11.Bd2 g6 12.0-0 Rc8 13.Ne5 Be6; 8...0-0 9.Nc3 dc4 10.Bc4 Bd7 11.Bd2 Rc8 12.Bd3 e5 13.Ne5 Ne5; 8...Qc7 9.cd5 Nd5 10.0-0 0-0 11.Bd2 e5 12.Nc3 Nc3 13.Bc3 Nd4) 9.Bc4 0-0 10.Nc3 Qc7 11.Bb2 Bd7 12.0-0 Rac8 13.Bd3 Qb6; B) 7...Bd7 B1) 8.0-0 0-0 (8...Nc6 9.Bd2 Ne4 10.c4 0-0 11.Nc3 Nd2 12.Nd2 Rc8 13.Qc2 dc4; 8...h6 9.Bd2 Nc6 10.Nc3 0-0 11.e4 de4 12.Ne4 Qc7 13.Qe2 Nd5; 8...Qc7 9.Bd2 Nc6 10.Nc3 0-0 11.e4 de4 12.Ne4 b5 13.Qe2 a6; 8...g6 9.Nc3 0-0 10.Bd2 Nc6 11.e4 a6 12.e5 Nh5 13.Ne2 f6) 9.Nc3 Nc6 10.Bd2 Qb6 11.Ne5 a6 12.Nd7 Nd7 13.Qf3 Qc7; B2) 8.Bd2 0-0 (8...a6 9.0-0 Nc6 10.Nc3 0-0 11.e4 de4 12.Ne4 b5 13.c3 Ne4; 8...h5 9.0-0 Nc6 10.Nc3 0-0 11.e4 de4 12.Ne4 b5 13.Qe2 Qb6; 8...Nc6 9.0-0 0-0 10.Nc3 Qc7 11.e4 de4 12.Ne4 Ne4 13.Be4 f5) 9.0-0 Nc6 10.Nc3 Be8 11.Qb1 Rb8 12.Qb2 b5 13.h3 a6; B3) 8.c4 dc4 (8...Qc7 9.cd5 ed5 10.Bd2 Ne4 11.Qb3 Nc6 12.Nc3 Nc3 13.Qc3 0-0; 8...Nc6 9.cd5 ed5 10.0-0 Rc8 11.Nc3 0-0 12.Bd2 h6 13.Ne5 Ne5) 9.Bc4 0-0 10.0-0 Nc6 11.Bd2 Rc8 12.Bd3 a6 13.Nc3 Bd6; B4) 8.Nc3 0-0 (8...Nc6 9.0-0 0-0 10.Bd2 a6 11.e4 de4 12.Ne4 Ne4 13.Be4 f5; 8...Qc8 9.Bd2 0-0 10.0-0 Nc6 11.e4 de4 12.Ne4 Ne4 13.Be4 b5; 8...Qc7 9.Bd2 0-0 10.0-0 Nc6 11.e4 de4 12.Ne4 Ne4 13.Be4 b5; 8...g6 9.0-0 0-0 10.Bd2 Nc6 11.e4 a6 12.e5 Nh5 13.Ne2 f6) 9.0-0 Nc6 10.Bd2 Qc7 11.e4 de4 12.Ne4 b5 13.Qe2 a6; C) 7...0-0 C1) 8.0-0 Qc7 (8...Nc6 9.Nc3 h6 10.h3 a6 11.e4 de4 12.Be4 Ne4 13.Ne4 Qc7) 9.Bb2 Bd7 10.Nbd2 Ba4 11.Qe1 Nc6 12.c4 Rfc8 13.h3 Na5; C2) 8.Bd2 b6 (8...Nc6 9.Nc3 b6 10.0-0 Bb7 11.h3 Rc8 12.Qe2 h6 13.Rfb1 Re8; 8...Ne4 9.c4 Qc7 10.Qc2 Nd7 11.Bb4 Ndf6 12.0-0 Re8 13.Nc3 Nc3; 8...h6 9.Nc3 Nc6 10.0-0 b6 11.Ne5 Bb7 12.f4 Rc8 13.Qf3 a6; 8...Qc7 9.Nc3 Nc6 10.0-0 a6 11.h3 Rd8 12.a4 b6 13.Rb1 h6) 9.Nc3 Nc6 10.0-0 Bb7 11.h3 h6 12.Qe2 Qd7 13.a4 Rfd8; C3) 8.Bb2 Qb6 (8...Nc6 9.Nc3 a6 10.0-0 Bd7 11.Qd2 Qa5 12.e4 de4 13.Ne4 Qd2; 8...Bd7 9.Nc3 Nc6 10.Ne5 Bd6 11.Nd7 Qd7 12.Qf3 e5 13.Qf5 Qf5; 8...Bd6 9.Nc3 Nc6 10.0-0 Bd7 11.Nb5 Be7 12.c4 dc4 13.Bc4 Qb6; 8...g6 9.Nc3 Nc6 10.0-0 a6 11.Qd2 Qb6 12.Rab1 Qa5 13.e4 de4) 9.Nc3 Nc6 10.Rb1 h6 11.0-0 Bd7 12.Qd2 Qa5 13.e4 de4; C4) 8.Nc3 a6 (8...h6 9.Bd2 Nc6 10.0-0 b6 11.Qe2 Bb7 12.h3 Qd7 13.a4 Rfc8; 8...Nc6 9.0-0 b6 10.Re1 Bb7 11.Bb2 Nh5 12.h3 f5 13.Na4 Rc8; 8...Bd7 9.Bd2 Nc6 10.0-0 Qc7 11.e4 Ne4 12.Ne4 de4 13.Be4 b5; 8...g6 9.0-0 Nc6 10.e4 de4 11.Be4 Ne4 12.Ne4 f5 13.Nc3 Bf6) 9.0-0 Nc6 10.Bd2 h6 11.Ne5 Bd7 12.f4 Rc8 13.Rf3 h5.

6.Be2 0-0 7.0-0 Nc6 8.d4 Bd6 9.Nbd2 e5 10.Bb2 (10.de5 Ne5 (10...Be5 11.Ne5 Ne5 12.Bb2 Re8 13.Nf3 Nf3 14.Bf3+=) 11.Bb2 (11.Rb1 Qe7 12.Bb2 Nf3 13.Nf3 Ba3 14.Bf6=) 11...Nc6= 12.c4 Be6 13.Bd3 dc4 14.Nc4+=; 10.Ne5 Ne5 11.de5 Be5 12.Rb1 Qd6 13.h3 Re8 14.c4=) 10...ed4 (10...e4!? 11.Ne5 (11.Ne1 Qc7 12.h3 Be6 13.c4 dc4 14.Nc4+=) 11...Qc7+= 12.f4 ef3 13.Ndf3 Bg4 14.Qd3+=) 11.Nd4= (11.Bd4 Nd4 12.Nd4 Qe7 13.Nb5 Be5 14.Nd4+=) 11...Nd4 12.Bd4 Ne4 13.Ne4 (13.Bd3 Qh4 14.Nf3 Qe7=) 13...de4 14.Qc1 (14.Bb2 Qc7 15.Qd4 f5=) 14...Qc7 (14...Qg5 15.f4 Qg6 16.Qb2+=) 15.g3 (15.Qb2 Rd8=) 15...Be5 (15...Be6 16.Qb2 f6 17.Rad1+=) 16.Rd1 Bf5 (16...Be6 17.Qb2 f6 18.Rd2+=) 17.Qb2 Bd4 18.Rd4 Rfd8 19.Rad1 Rd4 20.Qd4 h6 (20...Rf8 21.c3= (worse is 21.Qa7 Qc2 22.Bh5 g6–/+)) 21.c4 Qe7 (21...Qc6 22.Qe5 Qg6 23.Rd6+=) 22.Qd5 Bg6 23.Bg4 Rf8 24.c5 Qg5 (24...Qc7 25.Qd6 Qa5 26.Rb1=) 25.Qg5+/– hg5 26.Rd6 (26.Rb1 f5 27.Be2 Rc8 28.Rb7 Rc5 29.Ra7 Rc2+/–) 26...Re8 (26...Kh7 27.Bd7+=) 27.Rd5+/– f6 28.Kf1 (28.Rd7 f5 29.Bd1 Rb8+/–) 28...Kf7 29.Ke1 Re7 30.Bd7 Re5 (better is 30...Kf8!?+=) 31.Re5+– fe5 32.Kd2 Ke7 33.Bc8 b6 34.cb6 ab6 35.Kc3 Kd6 36.Kb4 Kc6 37.Be6 Kd6 38.Bg8 (38.Bg4 Kc6+/–) 38...Be8 39.Bh7 Bc6 40.a4 Ke6 41.a5 (41.h3 Kf7 42.Bf5 Ke7+/–) 41...ba5 ½–½. Gurgenidze – Buslaev, Tbilisi, 1965. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 c5 5.bc5 Bc5)

7.c4 0-0 8.Bb2 dc4 9.Bc4 Qb6 (9...a6 10.Bd3=) 10.Qe2 Bd7 11.0-0 Bc6 12.Ne5 Rc8 13.Nc3 (13.Nc6 Nc6 14.Nc3 Qc7+=) 13...Be5+= 14.de5 Nfd7 15.Nb5 Bb5 (15...Bg2 16.Rfc1 Bc6 17.Nd6=) 16.Bb5 Nc6 17.Rab1 Qa5 (worse is 17...Nde5 18.Bc6 Nc6 19.Bg7+/–) 18.f4 a6 19.Bd3 White plans f5 19...Nc5 20.Bc2 Rd8 21.Rf2 (21.Rfd1 Rd1 22.Rd1 Rd8=) 21...Ne7 (21...Rac8 22.f5 ef5 23.Bf5=) 22.g4 White prepares the advance f5 (22.Bd4 Rac8=) 22...Rac8 23.f5 Nc6 24.Qf3 Rc7 25.Qh3 ef5 (25...Nd3 26.fe6 Nf2 27.Qh7 Kf8 28.Qh8 Ke7 29.Qh4 Kf8 A) 30.Qf2 Rd2 (30...Ne5?! 31.Be4+=) 31.Qh4 Ne5–+ (31...Rc2?! 32.Qh8 Ke7 33.ef7 Kf7 34.Qh5 Kg8 35.Qe8 Kh7 36.Qh5 Kg8 37.Qe8 Kh7 38.Qh5 Kg8=); B) 30.Qh8 Ke7 31.Qh4 Kf8 B1) 32.Qf2 Rd2 (32...Ne5?! 33.Be4+=) 33.Qh4 Ne5–+ (33...Rc2?! 34.Qh8 Ke7 35.ef7 Kf7 36.Qh5 Kg8 37.Qe8 Kh7 38.Qh5 Kg8 39.Qe8 Kh7 40.Qh5 Kg8=); B2) 32.Qh8=) 26.gf5 Rd2 27.Rbf1 (27.f6 g6 28.Rd2 Qd2 29.Qh6+=) 27...Nd3 Pawn e5, live or die! (27...Rf2!? 28.Rf2 Qe1 29.Kg2 Rd7+=) 28.f6+= Nce5 29.Bd3 Rd3 (29...Nd3?? 30.Qg2 g6 31.Rd2+–) 30.Rf5 1–0. Ortiz,Clodomiro (2190) – Schmid,Pablo (1945), FICGS, 2013. (=1.Nf3 Nf6 2.b4 d5 3.a3 e6 4.e3 c5 5.bc5 Bc5 6.d4 Bd6)

7.c4 0-0 8.Qc2 Qc7 9.Bd2 dc4 10.Bc4 b5 11.Bd3 Qc2 12.Bc2 Bb7.

7.c4 0-0 8.Nc3 Bd7=.

7.c4 0-0 8.c5 Be7+= (8...Bc7 A) 9.Bb5 Bd7 (9...b6 10.0-0 Ne4 11.Bb2 a6 12.Bd3 bc5=; 9...Ne4 10.0-0 b6 11.Bb2 a6 12.Bd3 bc5=) 10.Bd3 b6 11.cb6 ab6 12.0-0 Nc6=; B) 9.Bd3 b6 (9...Nc6 10.0-0 b6 11.Nbd2 bc5 12.dc5 Rb8=) 10.Bb2 bc5 11.dc5 Qe7 12.0-0 e5+=; C) 9.Bd2 b6 (9...Nbd7 10.Be2 Ne4 11.Qc2 Ndf6 12.Nc3 Nd2=; 9...Nc6 10.Bb5 e5 11.Bc6 bc6 12.Ne5 Be5+=) 10.Bb4 a5 11.cb6 ab4 12.bc7 Qc7+=; D) 9.Nc3 b6 (9...Nc6 10.Bb5 a6 11.Bc6 bc6 12.Rb1 Nd7=; 9...Nbd7 10.Bb5 a6 11.Be2 b6 12.cb6 Nb6=) 10.cb6 ab6 11.Nb5 Ba6 12.a4 Qd7=) 9.Bd3 (9.Qa4 b6 (9...Bd7 10.Qb3 b6 11.cb6 Qb6 12.Nbd2 Qa5+=; 9...Nc6 10.Bb5 Bd7 11.Nbd2 Qc7 12.Rb1 b6+=) 10.c6 Qc7 11.Bb5 Ne4 12.Bd2 a6–/+; 9.Ne5 b6 (9...Nbd7 10.Nf3 Qc7 11.Nc3 b6 12.Nb5 Qc6=) 10.c6 Qc7 11.Bb5 Ne4 12.Qa4 f6–/+; 9.Nc3 b6 10.cb6 ab6 11.Qb3 Ba6 12.Ba6 Ra6+=) 9...b6 10.cb6 Qb6 (10...ab6 11.a4 Nc6 12.Ba3 Nb4+=) 11.0-0 Ba6 12.Nc3 (12.a4 Qa5=) 12...Qa5 (12...Bd3+=) 13.Ne2 Bd3 14.Qd3 Ne4 (14...Rc8 15.Ne5+=) 15.Nd2 Nd2 (15...Nd6 16.Rb1=) 16.Bd2 Qa6 17.Nf4 Bd6 (17...g5 18.Bb4 Bb4 19.ab4=) 18.Bb4 Rd8 19.Bd6 Qd6 20.Rfc1 Nd7 21.h4 (21.Qb5 Rac8 22.Qb4 Rc1 23.Rc1 Nb6=) 21...Rdc8 (21...Nb6 22.Nh3=) 22.Rc8 (22.h5 Rab8=) 22...Rc8 23.Rb1 Qc6 (23...Nb6 24.Qa6=) 24.Qb5 Qb5 (24...Qc7 25.Qb7=) 25.Rb5 Rb8 26.Rb8 ½–½. Malmstroem,Jan – Bennett,Hilton, email 4AMM–F, 1998.

7.c4 b6 8.cd5 ed5 9.Bb5 Bd7 10.Bd3 (10.a4 0-0 11.Ba3 Ba3 12.Ra3 Qe8 13.Qb3) 10...Nc6 11.Nbd2 0-0 12.Bb2 Ne7 13.Rc1 Bf5 14.Bf5 Nf5 15.Qc2 Qd7 16.0-0 Ng4 17.h3 (17.Qc6 Qe6=) 17...Rac8 18.Qd3 Nf6 19.Ne5 Qe6 20.g4 (20.Qa6 Bb8=) 20...Nh4+= 21.f4 Be5 (21...Rfe8 22.Rc8 Rc8 23.Kh2+=) 22.de5 Ng4 (22...Nd7 23.e4 de4 24.Ne4=) 23.f5 (23.hg4 Qg4 24.Kf2=) 23...Nf5= 24.Rf5 (24.hg4 Nh6=) 24...Ne3 (24...Rc1 25.Bc1 Ne5 26.Qf1+=) 25.Rh5 Qg6 26.Kf2?? (better is 26.Qg6 hg6 27.Rg5+=) 26...Qh5 (26...Qh5 27.Qe3 Rc1 28.Bc1 f6 29.ef6 Rf6 30.Ke1 Rf8 31.Qe6 Kh8–+) 0–1. Hristov,K (1800) – Mihov,Emil (1800), BUL CSKA Semifinal, Sofia BUL, 2010. (=1.Nf3 d5 2.b4 Nf6 3.a3 e6 4.e3 c5 5.bc5 Bc5 6.d4 Bd6)

7.c4 b6 8.cd5 Nd5 9.e4 Ne7 10.Bd3 0-0 11.e5 Bc7 12.Bh7! Kh7 13.Ng5 Kg6 14.h4 Qd5 15.h5 (15.h5 Kh6 16.Qc2+–) 1–0. Kuroro Lucifer – Whiterose, ChessWorld.net, 2005.

7.c4 dc4 8.Bc4 Bd7 9.0-0 Nc6 10.Bb2 Qc7 11.Nbd2 0-0 12.Re1 Na5 13.Ba2 Bc6 14.e4 Ng4 15.g3 f5 16.Be6 Kh8 17.ef5 g6 18.d5 Be5 19.Ne5 Ne5 20.Be5 1–0. OnlyPolishOpening (1915) – Singhmithu (1635), lichess.org, 2020.

7.Nbd2 0-0 8.Bd3 b6 (8...Nc6 9.Bb2=) 9.e4 de4 (9...Bb7 10.e5 Ne4 11.Bb2= (11.ed6? Nc3–+)) 10.Ne4+= Bb7 11.Nf6 gf6 12.Bh6 Re8 13.Bb5 Bc6? (better is 13...Re7+/–) 14.Ne5!+– (14.Ne5 Be4 15.Qe2+–) 1–0. glovio (2025) – wwgia (1710), gameknot.com, 2014.

7.Bd3 0-0 8.Nbd2 Nbd7 9.0-0 e5 10.de5 Ne5 11.Bb2 Nd3 12.cd3 Nd7 (12...Bf5 13.Qb3+=) 13.Qc2= Nc5 (13...Nb6 14.a4=) 14.Nb3 (14.Be5 Bf5 15.e4 Bg6+=) 14...b6 15.Nbd4 (15.Nc5!? bc5 16.e4=) 15...Ba6+= 16.Rfd1 Qd7 17.a4 Rfc8 18.Bc3 Rc7 19.Ne2 (19.a5 b5 20.Bb4 Rac8+=) 19...Rac8 20.Nfd4 (20.h3 f6–/+) 20...Be5 (20...h6 21.h3–/+) 21.Nb5 Bb5 22.ab5 Bc3 23.Qc3 (23.Nc3?? Ne6–+) 23...Qb5 24.Nd4 Qd7 25.Qb4 Ne6 26.Nf5 g6 27.Nd4 Nd4 28.Qd4 Rc5 29.Qb2 R8c6 30.Qe5 a5 31.Rab1 Qd6 32.Qd4 b5 33.Qa1 b4 34.d4 Rb5 35.Qa4 Qb8 36.h3 (36.Rb3 Kg7–+) 36...Rc3 Black intends b3 37.Rb3 Rb3 38.Qb3 Qc7 39.Ra1? (39.Qb1–+) 39...Qc4 40.Qb2 b3 41.Rc1 (41.Kh2 Qc7 42.f4 Qc2 43.Qc2 bc2–+) 41...Qb4 42.Rc8 (42.Ra1 a4–+) 42...Kg7 43.f4 (43.e4–+) 43...a4 44.f5 (44.Ra8 Ra5 45.Ra5 Qa5–+) 44...a3 45.Qf2 Qd6 46.f6 (46.e4 Qf6 47.Qf1 Qd4 48.Kh2–+) 46...Qf6 47.Rg8 Kg8 48.Qf6 b2 49.Qe7 b1Q 50.Kh2 a2 51.Qe8 Kg7 52.Qe5 Kf8 53.Qh8 Ke7 54.Qe5 Kd7 55.Qf6 Qe4 56.Qa6 Rb2 57.Qa4 (57.Qa7 Ke6 58.Qa6 Kf5 59.Qf1 Kg5 60.Kg3 a1Q 61.Qf4 Qf4 62.ef4 Kf5 63.h4 Qe1 64.Kh2 Qh4 65.Kg1 Rb1) 57...Ke6 58.Qe8 (58.Qa6 Kf5 59.Qf1 Kg5 60.Kg3 a1Q 61.Qf4 Qf4 62.ef4 Kf5 63.h4 Qe1 64.Kh2 Qh4 65.Kg1 Rb1) 58...Kf5 59.Qd7 (59.Qe5 Qe5 60.de5 a1Q 61.Kg3 Qh1 62.Kh4 Qe1 63.g3 Rb4 64.e4 Re4) 59...Kg5 (59...Kg5 60.Qd8 Kh6 61.Qf8 Kh5 62.Qh6 Kh6 63.Kg3 Rg2) 0–1. Frenzel,Lothar (2035) – Perez Fernandez,Jose Vicente (2425), Slovenia's, 2008.

5.c4 a5 6.b5=.

5.c4 dc4 6.Bc4= b5 7.Be2 a5 8.ba5 Qa5 (8...Bb7 9.0-0=) 9.Bb2 Nbd7 10.0-0 Be7 (10...Bd6 11.Nc3=) 11.Qc2 (11.Nc3 0-0=) 11...Bb7 12.Nd4 (12.Nc3 0-0=) 12...Qb6 (12...Nc5 13.Nc3=) 13.Rc1 (13.a4=) 13...Rc8 (13...Nc5!?=) 14.a4+= ba4 (14...0-0 15.a5 (worse is 15.ab5 cb5 16.Qd1 Rc1 17.Qc1 Rc8+=) 15...Qa6 16.Ba3 Ba3 17.Ra3+=) 15.Nc3+/– 0-0 16.Na4 Qa5 (16...Qc7 17.Nb5 Qb8 18.Nbc3+/–) 17.Nc3 (17.Nb3 Qd8+/–) 17...Qg5 (17...Qd8 18.Rcb1+/–) 18.Nf3 (18.f4!? Qh4+/–) 18...Qh6+/– 19.Ra7 Rb8 20.h3 (20.Rb1 c5+/–) 20...c5 21.Ba3 (21.Nb5 Bf3 22.gf3 Rfd8+=) 21...Bc6+= 22.Rb1 (22.Ra1 Ra8 23.Bb2 Ra7 24.Ra7 Rb8+=) 22...Ra8= 23.Ra8 Ra8 24.Bb2 Qg6 (24...Nd5 25.Nd5 ed5 26.Ne5=) 25.Bd3 Qh5 26.Ne1 (26.e4 Bd6=) 26...Ne5 (26...Rb8 27.Be2 Qg6 28.Bd3=) 27.Bf1 (27.Bb5 Rb8=) 27...Qg6 28.Qc1 (28.Be2 Rd8 29.d3 Bd6=) 28...Rd8 (28...Rb8 29.Ra1+=) 29.Ra1 h6 (29...Rb8 30.Ra7 Nfd7 31.f4+=) 30.Ne2= Ned7 (30...Bd6 31.Nf4 Qg5 32.Ne6 fe6 33.f4=) 31.Ra6+= Nb8 32.Nf4 Qe4 (32...Qg5 33.Ra7 Rd7 34.Ra5+=) 33.Ra7 Rd7 (33...Nbd7 34.Bc3 Ra8 35.f3+/–) 34.Ra5 (34.Bd3 Qb4 35.Ra1 Rb7+=) 34...Qb4+= Exerts pressure on the backward pawn 35.Bc3 (35.Qa1 Qb6+=) 35...Qb6 36.Ra1 (36.Nf3 Bd6=) 36...Rb7 (36...Ra7 37.Rb1 Qc7 38.Bf6 Bf6 39.Qc5+=) 37.Ned3 (37.Ba5 Qb2+=) 37...Nbd7 38.Nb2 (38.Ne5 Ne5 39.Be5 Qd8+=) 38...Ra7 (38...Qc7 39.Nc4=) 39.Nc4+= Ra1 40.Qa1 Qb8 41.d3 (41.f3 g6+=) 41...Ne8 (41...g5 42.Ne2=) 42.Ne2 (42.g3 Bf6=) 42...Bf6= 43.Bf6 (43.Qa6 Bb5 44.Qa3 g6=) 43...Nef6 44.Nc3 Nd5 45.Ne4 Nb4 (45...N5b6 46.Qa6 Be4 47.de4 Nc4 48.Bc4=) 46.Ncd2 (46.Ned6 Nd5=) 46...Bb5 (46...f5 47.Ng3=) 47.Qc3 Qb6 (47...Ba6 48.Nb3 Qe5 49.Qe5 Ne5 50.Nbc5 Bd3 51.Nd2=) 48.Nc4 (48.d4 Nd5 49.dc5 Nc3 50.cb6 Bf1 51.Kf1 Ne4 52.Ne4 Nb6=) 48...Qc6 (48...Bc4 49.dc4 f5 50.Qd2=) 49.Ned6 (49.Ncd6 Ba6=) 49...Ba6 (49...Bc4 50.Nc4 Nb6 51.Qe5=) 50.Ne8 (50.Be2 Bc4 51.Nc4 Qa6=) 50...f6= 51.Ned6 Nb6 52.Nb6 Qd6 d3 draws heavy fire 53.Nc4 Qd5 (53...Nd5 54.Qa1 Bc4 55.dc4=) 54.Nb2 (54.d4 Na2 55.Qb3 Nb4=) 54...Qd6 (54...Qa2 55.Nc4=) 55.Be2 Bb5 (55...e5 56.h4=) 56.Bf1 (56.f4 Qd5=) 56...Ba6 (56...Nd5 57.Qb3 Bc6 58.Nc4=) 57.h4 Kh8 (57...Qd5 58.Nc4=) 58.Qa3 (58.Nc4 Bc4 59.Qc4 Kg8=) 58...Kg8 59.g3 (59.Qc3 Qd5=) 59...Kf7 (59...f5 60.h5=) 60.Kh2 (60.Nc4 Qe7=) 60...Ke7 (60...f5 61.Nc4 Bc4 62.dc4=) 61.Kg1 (61.Nc4 Qd8=) 61...Kd7 (61...f5 62.Qc3 Kf7 63.Nc4 Bc4 64.Qc4=) 62.Qa4 (62.Qa1 Qc6=) 62...Ke7 (62...Qc6 63.Qa5 Bb7 64.e4=) 63.Qd1 (63.Nc4 Bc4 64.Qa7 Kf8 65.dc4 f5=) 63...Kf8 64.Qh5 (64.Be2 Qd5=) 64...Nd3 (64...Qd5 65.Qe2+=) 65.Nd3 Bd3 66.Bd3 Qd3 67.Qc5 Kf7 68.Qc7 ½–½. Mirzoev,Azer (2540) – Cernousek,Lukas (2460), Ceske Budejovice GM, 2017. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 c6)

5.c4 Be7 6.Be2 (6.Nc3 a5 7.b5 0-0=) 6...0-0 (6...dc4 7.Bc4 b5 8.Be2=) 7.0-0 (7.Nc3 dc4 8.Bc4 b5=) 7...Nbd7 (7...dc4 8.Nc3=+) 8.cd5 ed5 9.Bb2 a5 10.b5 c5 11.a4 Re8 12.d3 (12.d4 c4=+) 12...b6 13.Nbd2 (13.Nc3 Bd6=+) 13...Bb7 (13...Bd6 14.Qc2=+) 14.Rc1 Bf8 15.Rc2 g6 16.g3 Bg7 17.Nh4 Rc8 18.Ng2 Rc7 (18...Qe7 19.Re1=+) 19.Qa1= d4 20.Nc4 Ne5 (20...Nd5 21.Nd6 Nb4 22.Rd2 (worse 22.Nb7 Nc2 23.Nd8 Na1 24.Nf7 Kf7 25.Ba1 de3–/+) 22...Bg2 23.Kg2=) 21.Ne5 (21.Nb6!? Bf3 22.Bf3 Nf3 23.Kh1+=) 21...Re5= 22.ed4 cd4 23.Rc7 Qc7 24.Bd4 Re2 25.Bf6 Bf6 (25...Bf8 26.Nf4 Rc2 27.Qe1=) 26.Qf6+= Re6 27.Qd4 (27.Qf4 Qd8+=) 27...Rd6= 28.Qe5 Qd7 29.Nf4 (29.Re1 Rd3 30.Qb8 Kg7 31.Qe5 Kg8 32.Qb8 Kg7 33.Qe5 Kg8=) 29...f6 30.Qe3 (30.Qc3 g5 31.Nh5 Kf7=) 30...g5=+ 31.Ng2 (31.Ne2 Rd3 32.Qb6 Kf7=+) 31...Rd3 (31...Re6!? 32.Qd2 Qd5=+) 32.Qb6= Qd5 33.f3 Rf3 34.Rf3 Qf3 35.Qf2 (35.Qe6 Kf8 36.Qd6 Kg8 37.Qd8 Kf7 38.Qd7 Kf8 39.Qd6 Kg8 40.Qe6 Kg7 41.Qe7 Kg8 42.Qe6=) 35...Qd1 (better 35...Qe4=+) 36.Ne1 (36.Qe1 Qd4 37.Qe3 Qa1 38.Qe1 Qd4 39.Qe3 Qd1 40.Qe1 Qd4=) 36...Qd5?? (better 36...Kf7–+) 37.Qf6+= Qh1 38.Kf2 Qh2 39.Ke3 (39.Kf1 Qh1 (39...Qg3 40.Qd8 Kf7 41.Qd7 Kg6 42.Qb7+–) 40.Ke2 Qe4 41.Kf2 A) 41...Qa4? 42.Qd8 (42.Qg5?! Kf7+=) 42...Kf7 43.Qc7 Kf6 44.Qb6 Kf5 45.Qb7+–; B) 41...Qd5=) 39...Qg3 40.Kd2 1–0. Gurgenidze,Bukhuti (2340) – Dgebuadze,Alexandre (2470), GEO–ch Tbilisi, 1996. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 c6)

5.d4 a5 6.b5 Qb6 7.a4 Ne4 8.Bd3 Bb4 9.Bd2 0-0 10.0-0 Nd2 11.Nbd2 Bd7 12.c4 dc4 13.Nc4 Qd8 14.Nb2 cb5 15.ab5 b6 16.Ne5 Ra7 17.Na4 Be8 18.Qb3 Bd6 19.Rfc1 Bc7 20.Rc3 Qd6 21.g3 Bd7? (better is 21...Qe7+–) 22.Nc4 Qb4 23.Ncb6 (23.Nab6?! Qb5 24.Nd7 Qd7+–) 23...Bb5 24.Qb4 (24.Bb5?! Bb6 25.Nb6 Rb7+–) 24...ab4 25.Raa3?? (better is 25.Rc7 Rc7 26.Bb5+–) 25...Bb6 (better is 25...Bd3 26.Rc7 ba3 27.Ra7–+) 26.Bb5 ba3 27.Ra3 Ra5 28.Rb3 Bd8 29.Nb2 Bf6 30.Nc4 Ra1 31.Kg2 Na6 32.Nb6 Rd8 33.Be2 g6 34.Rb5 Nc7 35.Rc5 Nd5 (35...Nd5 36.Nd5 Rd5–+ (worse is 36...ed5 37.Bf3–+)) 0–1. aspasio – iozeph (2700), net–chess.com, 2015.

5.c4 0-0 6.Bb2 b6 7.cd5 ed5 8.Qc2 c5 9.Ng5 (9.bc5 bc5 10.Be2 Ba6 11.Ba6 Na6 12.0-0+=) 9...g6 10.Bd3 (10.bc5 bc5 11.f4 h6 12.Nf3 Bf5=) 10...c4 11.Be2 Bf5 12.Qd1 Nc6 13.0-0 Be5 (13...a5 14.b5 Ne5 15.Bd4 h6 16.Nf3=) 14.Be5 Ne5 15.f4 (15.Nc3 a5 16.Nb5 ab4 17.ab4 Qd7 18.Nd4 Nd3 19.Bd3 Bd3unclear) 15...Nd3 16.Nf3 Re8 17.Nc3 h6?! (17...Qd7 18.Nd4 a6 19.Nf5 Qf5 20.g4 Qd7 21.Bd3 cd3=+) 18.Nd4 Qd7 19.Nf5 Qf5 20.Nb5 Red8 21.Rf3? a6 22.Nd4 Qe4 23.Rg3? Re8 24.f5 g5 25.Bf3 Qe5 26.Qc2?! a5–/+ 27.b5 Qd6 28.a4 Ne5 29.Qd1 Kh7!? 30.h3 Rg8 31.Qc2 Nd3–+ 32.Ne2 h5 33.Qc3 h4 34.Rg4 Ng4 35.Bg4 Nc5 36.Bh5 Ra7! 37.Nd4 Ne4 38.Qc2 g4! 0–1. Pommerel – Mrkvicka, corr 1994–96 (Mrkvicka).

5.c4 a5 6.c5 Be7 7.Bb2+=.

5.c4 dc4 6.Bc4 a6 7.d4 b5 8.Bd3 Bb7 9.Nc3 Nbd7 10.0-0 e5 11.e4 ed4 12.Nd4 c5 13.bc5 Bc5 14.Nf5= Ne5 15.Bc2 Qd1 16.Rd1= 0-0 17.Nd5 Nd5 18.ed5 Rac8 19.Bb3 Ng4 20.Ra2 Rfd8 21.Bg5 Rd7 22.h3 h6 23.Bh4 Nf6 24.Nh6! gh6 25.Bf6 Rd6 26.Be7 Rd7 27.d6 Bd6?? 28.Bd6+– Rc3 29.Bc2 Bc6 30.Bf5 Rd8 31.Rc2 (31.Rc2 Rc4 32.Rd3+–) 1–0. epiglotis (2000) – dbryant (1900), net–chess.com, 2001.

5.c4 dc4 6.Bc4 e5 7.0-0 A) 7...h6 A1) 8.d4 ed4 (8...Nc6 9.Bb2 ed4 10.ed4 0-0 11.d5 Nb8 12.Nc3 a5) 9.Nd4 0-0 10.Bb2 Nbd7 11.Nd2 Ne5 12.Qc2 a5; A2) 8.Qc2 Nc6 (8...0-0 9.Nc3 Nc6 10.Bb2 Re8 11.b5 Na5 12.Bd3 Be6) 9.Nc3 0-0 10.Bb2 Re8 11.b5 Na5 12.Bd3 Be6; A3) 8.Nc3 Nc6 (8...0-0 9.d4 Nc6 10.d5 Ne7 11.e4 a5 12.Be3 Ng6) 9.b5 Na5 10.Ba2 0-0 11.Qa4 c6 12.Bb2 a6; B) 7...a5 B1) 8.d4 ed4 (8...Nbd7 9.Bb2 ed4 10.Qd4 ab4 11.ab4 Ra1 12.Ba1 Nb6) 9.b5 de3 10.Be3 0-0 11.Nc3 Nbd7 12.Qd4 Nb6; B2) 8.Qb3 0-0 (8...Qe7 9.Nc3 0-0 10.Bb2 e4 11.Nd4 Nc6 12.Ncb5 ab4) 9.Bb2 ab4 10.Ne5 Qe7 11.f4 Nbd7 12.Nd3 Nb6; B3) 8.Bb2 ab4 (8...0-0 9.Ne5 ab4 10.ab4 Ra1 11.Ba1 Qe7 12.f4 Nc6) 9.ab4 Ra1 10.Ba1 Nc6 11.b5 Na5 12.Bd3 Bg4; C) 7...Nc6 C1) 8.Qc2 0-0 (8...h6 9.Nc3 0-0 10.Bb2 Re8 11.b5 Na5 12.Bd3 Be6) 9.Nc3 h6 10.Bb2 Re8 11.b5 Na5 12.Bd3 Be6; C2) 8.Bb2 0-0 (8...Bf5 9.Nc3 0-0 10.d3 h6 11.h3 Qd7 12.Nd5 Qd8) 9.Nc3 h6 10.Qc2 Re8 11.Ne4 Bf5 12.d3 Ne4; C3) 8.Nc3 0-0 (8...h6 9.Qa4 0-0 10.b5 Ne7 11.d4 ed4 12.ed4 Bf5 ) 9.Bb2 Bf5 10.d3 a6 11.Qc2 h6 12.h3 Qe7; D) 7...0-0 D1) 8.Qc2 Nc6 (8...h6 9.Nc3 Nc6 10.Bb2 Re8 11.b5 Na5 12.Bd3 Be6) 9.Nc3 h6 10.Bb2 Re8 11.b5 Na5 12.Bd3 Be6; D2) 8.d3 a5 (8...Nc6 9.Bb2 Bf5 10.Nc3 Qe7 11.Qc2 h6 12.h3 Be6) 9.ba5 Nbd7 10.Bd2 e4 11.de4 Ne4 12.Nc3 Ndf6; D3) 8.Nc3 Nc6 (8...h6 9.d4 Nc6 10.d5 Ne7 11.Qd3 a5 12.Bd2 ab4) 9.Qc2 h6 10.Bb2 Re8 11.b5 Na5 12.Bd3 Be6.

5.c4 dc4 6.Bc4 e5 7.Bb2 0-0 A) 8.Qc2 Qe7 (8...Nc6 9.Nc3 Be6 10.Be6 fe6 11.0-0 Qd7 12.h3 a6) 9.Nc3 Be6 10.Bd3 h6 11.Ne4 Nbd7 12.Nf6 Qf6; B) 8.Be5 Be5 (8...Nc6 9.Bd6 Qd6 10.Nc3 Be6 11.Be6 fe6 12.0-0 Ng4) 9.Ne5 Nbd7 10.Nf3 Nb6 11.Be2 Qe7 12.Nc3 a5; C) 8.Ne5 Qe8 (8...Be6 9.Be6 fe6 10.Nc4 Nbd7 11.Nc3 Ne5 12.Qe2 Qe7) 9.Nf3 Be6 10.Be6 fe6 11.Qb3 Nc6 12.Ng5 Nd8.

5.c4 dc4 6.Bc4 e5 7.Bb2 Nc6 A) 8.Qc2 0-0 (8...Qe7 9.Ng5 0-0 10.Nc3 g6 11.0-0 Bf5 12.d3 h6) 9.Nc3 Be6 10.Be6 fe6 11.0-0 Qd7 12.h3 a6; B) 8.Nc3 0-0 (8...Bf5 9.d4 0-0 10.d5 Ne7 11.0-0 a5 12.Qb3 e4) 9.Qc2 Be6 10.Be6 fe6 11.0-0 Qd7 12.h3 a6; C) 8.0-0 0-0 (8...Bf5 9.d4 e4 10.Ne5 Be5 11.de5 Ng4 12.Bd5 Nge5) 9.Nc3 Bf5 10.Nb5 a6 11.Nd6 Qd6 12.d4 e4.

5.c4 dc4 6.Bc4 e5 7.Bb2 Nbd7 A) 8.0-0 0-0 (8...e4 9.Ng5 0-0 10.Nc3 Ne5 11.Qb3 Nc4 12.Qc4 Be5) 9.Qc2 h6 10.Nc3 Nb6 11.Be2 Re8 12.d4 ed4; B) 8.Qc2 0-0 (8...h6 9.Nc3 Nb6 10.Be2 0-0 11.0-0 Re8 12.d4 ed4) 9.0-0 Nb6 10.Ne5 Qe7 11.f4 Nc4 12.Nc4 Be6; C) 8.Nc3 0-0 (8...Nb6 9.Bb3 0-0 10.0-0 Be6 11.Ng5 Bb3 12.Qb3 c6) 9.Qc2 Nb6 10.Bd3 h6 11.h3 Bd7 12.0-0 Qe7.

5.c4 dc4 6.Bc4 e5 7.Bb2 Qe7 8.h3 (8.d3 Nbd7= (8...0-0 9.Nc3 Nbd7 10.0-0 Nb6 11.Bb3 Bd7 12.Ng5 a5; 8...Nc6 9.Nc3 0-0 10.0-0 Be6 11.Qb3 h6 12.h3 a6) 9.0-0 0-0 10.Nc3 Nb6 11.Bb3 Bd7 12.Ng5 a5; 8.Nc3 0-0 (8...Nc6 9.Qa4 e4 10.Ng5 0-0 11.b5 Ne5 12.Nce4 Ne4) 9.Qc2 Be6 10.Be6 Qe6 11.0-0 h6 12.d4 Nbd7; 8.Qc2 0-0 (8...Nc6 9.Nc3 Be6 10.Be2 g6 11.Qa4 0-0 12.b5 Nb8) 9.Nc3 Be6 10.Bd3 h6 11.Ne4 Nbd7 12.Nf6 Qf6; 8.0-0 Nc6 (8...0-0 9.Nc3 e4 10.Nd4 Nc6 11.Nc6 bc6 12.f3 ef3) 9.Nc3 0-0 10.Qc2 Be6 11.Be6 Qe6 12.Ng5 Qg4) 8...0-0 (8...Nc6 9.Nc3 0-0 10.Qc2 e4 11.Ng5 Bf5 12.g4 Bg6) 9.d3 (9.Nc3 Nc6 10.d3 Be6 11.Qb3 a5 12.Be6 ab4) 9...Nbd7 10.Nc3 (10.0-0 a5= (10...Nb6 11.Bb3 a5 12.Nbd2 Bd7) 11.Nbd2 Nb6 12.Bb3 Bd7) 10...Nb6 (10...a5 11.0-0 Nb6 12.Nb5 Bd7) 11.Bb3 c6 (11...a5 12.b5 Bf5) 12.b5 (12.Qc2 Be6=; 12.0-0 Be6) 12...Bf5 (12...Bd7 13.a4+=) 13.bc6= bc6 14.e4 Be6 15.Bc2 (15.Be6 Qe6 (worse is 15...fe6 16.Qc2+=) 16.Rb1 Rfd8=) 15...Rfd8 (15...Rfb8 16.Qc1+=) 16.0-0 (16.Bb3 Bb3 17.Qb3 Rab8+=) 16...Nfd7 (16...Rab8 17.Qc1+=) 17.Bc1 (17.Bb3 Bb3 18.Qb3 Rab8+=) 17...Nf8 (17...Bc5 18.Bg5 f6 19.Bc1+=) 18.a4 (18.Bb3 Bc5+=) 18...Ng6 19.a5 (19.Bb3 Bb4 20.Na2 Ba5=) 19...Nd7 (19...Bb4 20.ab6 Bc3 21.Ra3+=) 20.Ng5 Nf4 (20...Bb4 21.Ne6 Qe6 22.Ne2+=) 21.Ne6 (21.Bf4 ef4 22.Ne6 fe6=) 21...Ne6+= 22.Ne2 Bc5 (22...Bb4 23.Be3+=) 23.Kh1 (23.Bb3 Rab8=) 23...Nf6 24.Ng3 (24.Ra4 Rab8+=) 24...Qc7 (24...Rab8 25.Nf5 Qc7 26.Qf3+=) 25.Bb3 Bd4 26.Ra2 Nf4 (26...Qd7 27.Bc4+=) 27.Bc4 Bc3 28.a6 Rab8 29.Nf5 Qd7 30.Bf4 ef4 31.Qf3 Qc7 32.Rc2 Be5 33.Rfc1 Bb2 (33...Rb6 34.Kg1+=) 34.Rg1 (34.Rb1 Ba3 35.Rd1 Qe5+=) 34...Be5 35.g3 (35.Bd5 Qd7 36.Bc6 Qd3+=) 35...fg3 36.d4 Bd4 37.Rg3 g6? (better is 37...Kh8 38.Rg7 Rb1 39.Rg1 Rg1 40.Kg1 Qe5+=) 38.Nd4+– Rd4 (38...Nh5 39.Qh5 Rb1 40.Kg2 Rd4 41.Qf3+–) 39.Qf6 Rd1 (39...c5 40.Rg5 Qd7 41.Kg2+– (41.Rc5?? Qh3 42.Kg1 Rd1 43.Bf1 Rf1)) 40.Kg2 Rbb1 41.Rd3 (41.Rd3 Rd3 42.Bd3+–) 1–0. Ivanets,Vladimir (2265) – Maurer,Fritz (2120), ch–Euro Senior, Davos SUI (2), 2006.

5.c4 dc4 6.Bc4 e5 7.Qb3 A) 7...Qe7 A1) 8.0-0 Nc6 (8...0-0 9.Nc3 Nc6 10.Qc2 g6 11.Bb2 Bf5 12.d3 Be6) 9.Nc3 0-0 10.Qc2 Be6 11.Bd3 h6 12.Bb2 Rfd8; A2) 8.Qc2 Be6 (8...0-0 9.Nc3 Be6 10.Be6 Qe6 11.0-0 h6 12.Bb2 Nc6) 9.Be6 Qe6 10.Nc3 0-0 11.0-0 Nc6 12.Ng5 Qg4; A3) 8.Nc3 0-0 (8...Nc6 9.Qa4 e4 10.Ng5 0-0 11.b5 Ne5 12.Nge4 Bf5) 9.Nb5 e4 10.Nd6 Qd6 11.Nd4 Nc6 12.Nb5 Qe7; B) 7...Qd7 B1) 8.0-0 0-0 (8...Nc6 9.Nc3 0-0 10.Ng5 h6 11.Nge4 Ne4 12.Ne4 Qf5) 9.Nc3 Nc6 10.Ng5 h6 11.Nge4 Ne4 12.Ne4 Qf5; B2) 8.Bb2 Nc6 (8...Qe7 9.Nc3 0-0 10.Nb5 Nc6 11.0-0 Bf5 12.d3 h6) 9.Nc3 0-0 10.Nb5 Qf5 11.0-0 Be6 12.Rac1 a6; B3) 8.Nc3 Nc6 (8...0-0 9.0-0 Nc6 10.Ng5 h6 11.Nge4 Ne4 12.Ne4 Qf5) 9.0-0 0-0 10.Ng5 h6 11.Nge4 Ne4 12.Ne4 Qf5; C) 7...0-0 C1) 8.0-0 e4 (8...a5 9.Bb2 ab4 10.Ne5 Qe7 11.f4 Nbd7 12.ab4 Ra1) 9.Nd4 Ng4 10.h3 Nh2 11.Rd1 Qg5 12.Kh1 Ng4; C2) 8.Ng5 Qe7 (8...Qd7 9.Nc3 Nc6 10.0-0 h6 11.Nge4 Ne4 12.Ne4 Qg4) 9.Nc3 h6 10.Nge4 Nc6 11.0-0 Bf5 12.Nd5 Nd5; C3) 8.Nc3 Nc6 (8...h6 9.0-0 Nc6 10.Nh4 a5 11.Bb2 Ne7 12.Nb5 b6) 9.0-0 Bf5 10.Ng5 Qe7 11.f3 h6 12.Nge4 a5.

5.c4 dc4 6.Bc4 e5 7.Qc2 A) 7...Nc6 A1) 8.Bb2 0-0 (8...h6 9.Nc3 0-0 10.0-0 Re8 11.Ne4 Bf5 12.d3 Ne4) 9.Nc3 Be6 10.Be6 fe6 11.0-0 Qd7 12.h3 a6; A2) 8.0-0 h6 (8...0-0 9.Nc3 Be6 10.Be6 fe6 11.Bb2 Qd7 12.h3 a6) 9.Nc3 0-0 10.Bb2 Re8 11.Ne4 Bf5 12.d3 Ne4; A3) 8.Nc3 0-0 (8...h6 9.Bb2 0-0 10.0-0 Re8 11.Ne4 Bf5 12.d3 Ne4) 9.0-0 Be6 10.Be6 fe6 11.Bb2 Qd7 12.h3 a6; B) 7...a5 B1) 8.b5 Nbd7 (8...0-0 9.Nc3 Nbd7 10.0-0 Nb6 11.Ba2 g6 12.d4 ed4) 9.Nc3 Nb6 10.Bd3 0-0 11.Bb2 h6 12.h3 Be6; B2) 8.ba5 Ra5 (8...0-0 9.Nc3 Ra5 10.Bb2 Nc6 11.0-0 Be6 12.Be6 fe6) 9.Nc3 0-0 10.0-0 Nc6 11.Bb2 Be6 12.Be6 fe6; B3) 8.Bb2 0-0 (8...Nbd7 9.Nc3 Nb6 10.Bd3 ab4 11.ab4 Ra1 12.Ba1 0-0) 9.b5 Nbd7 10.Nc3 Nb6 11.Bd3 g6 12.0-0 Bd7; C) 7...h6 C1) 8.0-0 Nc6 (8...0-0 9.Nc3 Nc6 10.Bb2 Re8 11.Ne4 Bf5 12.d3 Qe7) 9.Nc3 0-0 10.Bb2 Re8 11.Ne4 Bf5 12.d3 Qe7; C2) 8.Bb2 Nc6 (8...Nbd7 9.Nc3 0-0 10.0-0 Nb6 11.Be2 Re8 12.d4 ed4) 9.Nc3 0-0 10.0-0 Re8 11.Ne4 Bf5 12.d3 Qe7; C3) 8.Nc3 Nc6 (8...0-0 9.Bb2 Nc6 10.0-0 Re8 11.Ne4 Bf5 12.d3 Qe7) 9.Bb2 0-0 10.0-0 Re8 11.Ne4 Bf5 12.d3 Ne4; D) 7...0-0 D1) 8.Nc3 a5 (8...Nc6 9.Bb2 h6 10.0-0 Re8 11.Ne4 Bf5 12.d3 Ne4) 9.b5 Nbd7 10.0-0 Nb6 11.Ba2 g6 12.d4 ed4; D2) 8.0-0 a5 (8...Nc6 9.Nc3 Be6 10.Be6 fe6 11.Bb2 Qd7 12.h3 a6) 9.b5 Nbd7 10.Nc3 Nb6 11.Bb3 a4 12.Na4 Na4; D3) 8.Bb2 Qe7 (8...Nc6 9.Nc3 h6 10.h3 Re8 11.d3 Be6 12.Be6 Re6) 9.Nc3 Be6 10.Bd3 h6 11.Ne4 Nbd7 12.Nf6 Qf6.

5.c4 dc4 6.Bc4 e5 7.Nc3 A) 7...Nc6 A1) 8.0-0 0-0 (8...h6 9.d4 0-0 10.d5 e4 11.Ne4 Ne4 12.dc6 bc6) 9.Qc2 Be6 10.Be6 fe6 11.Bb2 Qd7 12.h3 a6; A2) 8.Ng5 0-0 (8...Rf8 9.0-0 h6 10.Nge4 Be6 11.Be6 fe6 12.b5 Ne7) 9.0-0 h6 10.Nge4 Ne4 11.Ne4 Qe7 12.Bb2 Be6; A3) 8.Qc2 0-0 (8...Qd7 9.b5 Na5 10.Bd3 0-0 11.0-0 c5 12.Ng5 g6) 9.0-0 Be6 10.Be6 fe6 11.Bb2 Qd7 12.h3 a6; B) 7...a5 B1) 8.Nb5 ab4 (8...0-0 9.Bb2 Nc6 10.Nd6 cd6 11.b5 Ne7 12.0-0 Be6) 9.Bb2 Nc6 10.ab4 Ra1 11.Qa1 0-0 12.Nd6 cd6; B2) 8.Bb2 0-0 (8...ab4 9.ab4 Ra1 10.Qa1 0-0 11.Nb5 Nc6 12.Nd6 cd6) 9.0-0 ab4 10.ab4 Ra1 11.Qa1 Nc6 12.b5 Nb4; B3) 8.b5 0-0 (8...Nbd7 9.Ng5 0-0 10.Qb3 Qe7 11.0-0 Nb6 12.Be2 h6) 9.0-0 Nbd7 10.Qc2 Nb6 11.Bd3 Bg4 12.Bb2 Bf3; C) 7...h6 C1) 8.Qc2 0-0 (8...Nc6 9.0-0 0-0 10.Bb2 Re8 11.b5 Na5 12.Bd3 Be6) 9.0-0 Nc6 10.Bb2 Re8 11.b5 Na5 12.Bd3 Be6; C2) 8.0-0 0-0 (8...Nc6 9.Qa4 0-0 10.b5 Ne7 11.d4 ed4 12.ed4 Bf5) 9.Bb2 Nc6 10.Qc2 Re8 11.b5 Na5 12.Bd3 Be6; C3) 8.d4 ed4 (8...Nc6 9.d5 Ne7 10.0-0 0-0 11.e4 a5 12.Bd2 ab4) 9.Nd4 0-0 10.0-0 Nc6 11.Nc6 bc6 12.f4 Qe7; D) 7...0-0 D1) 8.Qc2 a5 (8...Nbd7 9.0-0 Nb6 10.Bb3 Qe7 11.Bb2 h6 12.Nb5 Nbd5) 9.b5 Nbd7 10.0-0 Nb6 11.Bd3 Bg4 12.Bb2 Bf3; D2) 8.Bb2 Bf5 (8...Nc6 9.Qc2 Be6 10.Be6 fe6 11.0-0 Qd7 12.h3 a6) 9.0-0 Nc6 10.Nb5 a6 11.Nd6 Qd6 12.d4 e4; D3) 8.0-0 Nc6 (8...a5 9.Bb2 ab4 10.ab4 Ra1 11.Qa1 Nc6 12.Nb5 Bb4) 9.Qc2 g6 10.Bb2 a6 11.Ng5 Bf5 12.d3 Ng4.

5.c4 dc4 6.Bc4 e5 7.Ng5 0-0 A) 8.Qb3 Qe7 (8...Qd7 9.Nc3 Nc6 10.0-0 h6 11.Nge4 Ne4 12.Ne4 Qf5) 9.Nc3 Nc6 10.Qc2 g6 11.Nb5 Bf5 12.e4 Nd4; B) 8.Qf3 h6 (8...Nc6 9.Nc3 h6 10.Nge4 Be6 11.Be6 fe6 12.0-0 Ne4) 9.Ne4 Ne4 10.Qe4 Nd7 11.0-0 Nf6 12.Qc2 a5; C) 8.Nc3 h6 (8...Nc6 9.0-0 h6 10.Nge4 Bf5 11.Qf3 Be6 12.Be6 fe6) 9.Nge4 Nc6 10.0-0 Bf5 11.Qf3 Be6 12.Be6 fe6.

5.c4 c6 6.d4 dc4 7.Bc4 0-0 8.Nc3 b5 9.Bd3 a5 10.ba5 Ra5 11.e4 Be7 12.0-0 b4 13.Na4 ba3 14.Ba3 Ba3 15.Ra3 Ba6 16.Qb3 Bd3 17.Qd3 Nbd7 18.Rfa1 Qa8 (18...e5 19.Nd2+=) 19.e5 Nd5 20.Ng5 g6 21.Nc5 Nc5?? (better is 21...Ra3 22.Ra3 Qe8+=) 22.Qh3+– (22.Ra5? Qa5 (22...Nd3? 23.Ra8 h6 24.Rf8 Kf8 25.Ne4+–) 23.Qd1 Qd8 24.Nh7 Kh7 25.dc5 Qg5–+; 22.dc5?! Nf4 23.Qe3 Ra3 24.Ra3 Qb8=) 22...h5 23.Ra5 (23.dc5?! Ra3 24.Qa3 Qb8=) 23...Qb7 (23...Qd8 24.Qg3 Nb7+–) 24.Rc5 Qb2 25.Rd1 Nc3 (25...Qe2 26.Qf3 Qf3 27.Nf3 Ne7+–) 26.Rc3 Qe2 27.Qf3 Qb2 28.Rc6 Ra8 29.Qf7 (29.Qf7 Kh8 30.Qh7) 1–0. Usingprogram (2055) – ardi76 (1620), kurnik, 2011.

5.Be2 e5 6.Bb2 e4 7.Nd4 0-0 8.0-0 c6 9.c4 dc4 10.Bc4 Ng4 11.h3 Ne5 12.Qe2 Qc7 13.Nc3 Nc4 14.Qc4 Re8 15.b5 Bh2 16.Kh1 cb5 17.Qb5 Bd7 18.Qd5 Re5 19.Qb3 Re8?? 20.Ndb5+– Bb5 21.Nb5 Qd8 22.Kh2 Qd2 23.Rfd1 Qa5 24.Qd5 Nc6 25.Qg5 f6 26.Bf6 g6 27.Rd7 Ne7 28.Qh6 Kf7 29.Qg7 Ke6 30.Rd6 Kf5 31.Nd4# 1–0. GLChess210 – Holmes034, computer chess game, 2000.

5.h3 Nc6 6.Bb2 Qe7 7.Bb5 a6 8.Ba4 0-0 9.Ng5 (9.Bc6 bc6 10.Be5 c5+=) 9...g6 (9...b5 10.Bb3–/+) 10.g4 Ne4 (10...b5 11.Bb3+=) 11.Nf3 (11.Ne4!? de4 12.Nc3+=) 11...b5+= 12.Bb3 Re8 13.d3 Ng5 14.Nh4 Ne5 (14...a5+=) 15.d4?? (better is 15.f4 Ne4 16.g5 Bb4 17.ab4 Qb4 18.Nd2 Nd2 19.Qd2 Qd2 20.Kd2+–) 15...Nd7 (15...Nc4 16.Bc1–/+) 16.f4 Ne4 17.g5 (17.Nf3!?+=) 17...a5 18.c3 a4 19.Bc2 c6 (better is 19...Ng5!? 20.Ng2 Ne4–/+) 20.Be4= de4 21.Qc2 Bb7 22.Nd2 Nb6 (22...e5 23.de5 Be5 24.0-0-0+=) 23.0-0 (23.Ne4 Red8+/–) 23...Kg7 24.Qe4 c5 25.dc5?? (better is 25.Qc2 cb4 26.cb4+=) 25...Be4–+ 26.Ne4 Nc4 27.cd6 Nd6 28.Nf6?? Nc4–+ 29.Bc1? Red8 30.e4 Rd3 31.e5 Rc3 32.Ne4 Rh3 33.Ng2 Rd8 34.Nc5 Rd5 35.Re1 h6 36.Ne4 h5 37.Kf2 Qa7 38.Kf1 Rf3 39.Ke2 Rh3 40.Nf6?? Rd4 41.Ra2 Qb7 42.Bb2 Qf3 (42...Qg2) 0–1. Pekin Dragons – pieeater, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.e3 Nf6 4.a3)

5.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3).

5.Nc3 e5=+ 6.Be2 (6.Bb2 a5=+) 6...Bd6 (6...a5 7.b5=+) 7.0-0 (7.Nb5 Be7=) 7...0-0 8.Nb5 Be7 9.d4 (9.Bb2 c6 10.Nc3 b5=) 9...e4=+ 10.Nd2 (10.Ne5 a5 11.ba5 c6–/+) 10...a5 11.ba5 (11.Rb1 c6 12.Nc3 b5–/+) 11...c6–/+ 12.Nc3 Qa5 13.Bb2 Bd6 14.a4 Re8 15.Nb3 (15.Nb5 cb5 16.ab5 Qb4 17.Ra8 Qb2–/+) 15...Qc7 16.h3 b6 17.Ba3 Ba3 18.Ra3 Ba6 19.Ba6 (19.Qd2 Be2 20.Ne2 Reb8=+) 19...Qd6 (19...Ra6 20.Qe2 Rea8 21.f3–/+) 20.Ra2 Ra6 21.Qd2 Rea8 22.Rfa1 (22.Rb1 Qe6–/+) 22...Ne8 (22...Qc7 23.Ne2=+) 23.a5=+ b5 (23...ba5 24.Ra5 Nc7 25.Ra6 Ra6 26.Ra6 Na6 27.Ne2=) 24.Ne2 (24.Rb1 Nef6=+) 24...Qg6 (24...Qf6 25.Rb1=+) 25.Nf4= Qh6 (26.Qe2 Nef6=+). Hohlstein,Walter – Schulz,Hans_Juergen, TSC, 2003.

5.c4 a5 6.b5 Nb6 7.cd5 ed5 8.Be2 Bd6 9.Bb2 0-0 10.Qc2 Re8 11.Bd4 Qe7 12.Nc3 (12.0-0 a4=) 12...Nbd7 (12...Ba3 13.Bf6 gf6 14.0-0=+) 13.Nh4 (13.0-0!?=) 13...g6=+ 14.Na4 (14.0-0 Ba3 15.Nf3 Bd6=+) 14...Nf8 (14...Ne5 15.0-0=+) 15.Bb2=+ Bg4 (15...Qe4 16.Qe4 Re4 17.Bd1=+ (worse 17.Bf6 Ra4 18.g3 Ra3–/+)) 16.Nf3 N8d7 17.h3 Bf3 18.Bf3 Be5 (18...c6!? 19.b6 Ne4=+) 19.0-0 Bb2 20.Nb2 (20.Qb2 Ne5=) 20...Rec8 (20...Ne5 21.Be2=+) 21.d4= Nb6 (21...Ne4 22.Nd3+=) 22.Na4 Na4 23.Qa4 c5 24.bc6 bc6 25.Rac1 c5 26.dc5 Rc5 27.Rc5 Qc5 28.Rb1 Kg7 (28...Rc8 29.Rb7+=) 29.g4 h6 30.Rb5 Attacking the isolated pawn on a5 30...Qc1 (30...Qc3 31.Kg2+– (31.Bd5?! Rd8 32.Bb3 Qc1 33.Kg2 Qc6 34.Kg1 Rd2=)) 31.Kg2 Qd2 32.Qd4 (32.Qd1 Qc3+–) 32...Qd4+= 33.ed4 Rc8 34.Ra5 Rc4 35.Bd5 Nd5 36.Rd5 Ra4 37.h4 Ra3 38.g5 hg5 39.hg5 ½–½. Dominguez,JM (2365) – Bruzon Batista,L (2615), Pan–American Teams, Mendes BRA, 2009. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 Nbd7)

5.c4 a5 6.b5 Bd6 7.d4 c5 (7...dc4 8.Bc4 0-0 9.Qc2=) 8.bc6 bc6 9.c5 Bc7 10.Qa4 Bb7 11.Nbd2 0-0 12.Rb1 Qc8 13.Bb2 Nb8 14.Qc2 h6 15.Bd3 Ba6 16.h3 Bd3 17.Qd3 Nbd7 18.a4 Nh7 19.0-0 f5 (19...Rb8 20.Bc3+=) 20.Qc2 (20.Bc3 Nhf6+=) 20...Nhf6= 21.Ne1 (21.Nh4 Qe8=) 21...Ne4 22.Nd3 g5 (22...Rb8 23.Bc3=) 23.Bc3+= Rf7 24.Rb2 Rg7 Black plans g4 25.Rfb1 Qe8 (25...Nc3 26.Qc3 Rb8 27.Rb8 Nb8 28.Nb3+=) 26.Rb7 Rc8 (26...Qd8 27.Nc1+=) 27.Nf1 (27.Nb3 Nc3 28.Qc3 Nf6+/-) 27...h5 Black prepares g4 (27...g4 28.hg4 Qg6 29.f3 Nc3 30.Qc3 fg4 31.f4+=) 28.Be1 (28.R1b3 g4 29.h4 Qd8+=) 28...g4+= 29.h4 Rh7 (29...e5 30.Bc3+=) 30.Kh1 (30.Nd2 Qd8+=) 30...Qe7 31.Kg1 (31.g3 Rf7+=) 31...Qe8+/- (worse 31...Qh4 32.Rc7 Rc7 33.f3+/-) 32.Nd2 e5 33.Ne5 (33.Nb3!?+/-) 33...Ne5= 34.de5 Qe5 35.g3 Qc3 36.Qd1 (36.Qc1 Qc1 (36...Qc5? 37.Ne4 Qc1 38.Rc1 de4 39.Rc6+-) 37.Rc1 Be5 38.Rh7 Kh7=) 36...Qf6 (36...Qc5 37.Rc1 Qd6 38.Nb3=) 37.Qc2 (37.Nb3 Bd8 38.Rh7 Kh7 39.Ba5 Ba5 40.Na5 Ra8=) 37...Qc3 38.Qd1 (38.Qc1 Rf7= (38...Qc5? 39.Ne4 Qc1 40.Rc1 de4 41.Rc6+-)) 38...Qf6 (38...Qc5 39.Rc1 Qd6 40.Nb3=) 39.Nb3 Exerts pressure on the isolated pawn 39...Re8 (39...Bd8 40.Rh7 Kh7 41.Ba5 Ba5 42.Na5=) 40.Nd4 (40.Ra7!?+=) 40...f4 (40...Nc5 41.Ra7 Be5 42.Ra5 Bd4 43.ed4= (worse 43.Qd4 Qd4 44.ed4 Rb7-/+)) 41.gf4 (41.gf4 Nc5 42.Ra7=). peonsetima (2215) - remajik (2180), gameknot.com, 2019. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 Nbd7)

5.c4 a5 6.cd5 ed5 7.b5 a4 (7...Bd6 8.Be2=) 8.d4= Bd6 9.Nc3 Nb6 10.Bd3 Qe7 11.h3 0-0 12.Bc2 (12.Qc2 Bd7=) 12...Bd7 (12...Ne4 13.Be4 de4 14.Nd2+=) 13.Nd2 Rfc8 14.0-0 (14.Na4? Bb5 15.Nc3 Qe3 16.Ne2 Qe7–+) 14...c5 15.bc6 (15.Re1 Ra5+=) 15...Rc6–/+ 16.Ne2 (16.Na4? Na4 17.Ba4 Rc1 18.Qc1 Ra4–+) 16...Rac8 17.Bd3 Ne4 18.Nb1 (18.Nf4!? Bf5 19.Re1–/+) 18...Qg5 19.f4 Qe7 20.Rf3 h5 (20...Bf5 21.g4 Bg6 22.f5–+) 21.Ra2 h4 22.Rc2 Rc2 23.Bc2 Bb5 24.Bd3 Bd3 25.Qd3 Nc4 (better is 25...Qc7!? 26.Rf1 Qc2–+) 26.Nbc3 (26.Nec3+=) 26...Nb6 (26...Na3?! 27.Nd5 Qe6 28.Nb6=; 26...Ba3?! 27.Nd5 Qe6 28.Ba3 Qd5 29.Nc3 Nc3 30.Qc3–/+) 27.Nb5 (27.Nb1 Qc7 28.Kf1–+) 27...Bb8 (27...Qd7 28.Rf1–/+) 28.Bd2 Bd6 29.Nd6 (29.Bc1 Qd7 30.Rf1–/+) 29...Qd6 30.Bb4 Qc6 31.Rf1 (31.f5 Nc4–/+) 31...Qc2 (31...Qc4 32.Qc4 Nc4 33.Rc1–+) 32.Qc2 (32.Qb5 Qc4 33.Nc3 Qb5 34.Nb5 Rc2–+) 32...Rc2–+ 33.Re1 Nc4 34.Nc1 (34.f5 Ne3 35.Nf4 Rf2–+) 34...Ne3! 35.Re3 (35.Re3 Rc1 Deflection (35...Rc1 Overloading)) 35...Rc1 (35...Rc1 36.Re1 Rc4–+) 0–1. Aurel – Godena, Forli, 1992. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 Nbd7)

5.d4 c6 6.c4 b6 7.Bb2 Bd6 8.Nbd2 0-0 9.Qc2 Re8 (better is 9...Ba6=) 10.cd5+– cd5 Opening the c–file gets White a lot of play 11.Qc6 Qc7 12.Qa8 Bb7 13.Qa7 Ra8 14.Qa8 Ba8 15.Rc1 Qb8 16.Bb5 Bb7 17.0-0 Ng4? (better is 17...Qa7+–) 18.Bd7 Bh2 19.Kh1 g6 (19...Bd6 20.Bb5+–) 20.b5 Bd6 21.Bc6 f6 22.Bb7 Qb7 23.Rc6 Qb8 24.Rfc1 Nf2 (24...Kg7 25.Kg1 Bh2 26.Kf1 Bd6+–) 25.Kg1 Kf7 26.Kf2 f5 (26...Bg3 27.Ke2 Bd6 28.e4+–) 27.Ne5 Ke7 28.Ndf3 Qa7 (28...Qa8 29.Rb6 Be5 30.de5+–) 29.a4! Qb8 (29...Qa4 30.Ra1) 30.Ng5 h6 31.Ngf7 Bb4 32.Rc7 Kf8 33.Nd7 Kf7 34.Nb8 (34.Nb8 Kf6 35.Nd7 Kg5 36.R1c6+–) 1–0. Baer,Werner (1900) – Munkwitz,Wolfgang (1615), TT–15.41 ETC, 2005.

5.d4 c6 6.c4 dc4 7.Bc4 Be7 8.0-0 0-0 9.Bb2 b6 (9...a5 10.ba5 Qa5 11.Qc2=) 10.Nbd2 Bb7 11.Qc2 Rc8 12.Rfd1 c5 13.dc5 bc5 14.b5 Nb6 (14...Qc7 15.Ra2+=) 15.Be2 (15.Ng5 g6+/–) 15...Bd6 16.Ng5 Nbd5 (16...e5 17.Bf3 Qe7 18.Bb7 Qb7+–) 17.Bf6?? (better is 17.Nc4 e5 18.Nd6 Qd6 19.e4+–) 17...Nf6+= 18.Nc4 Bd5 19.Nd6 Qd6 20.e4 Qe5 21.ed5 Qg5 22.de6 fe6 23.Bc4 Nd5 24.Qe4 Nf4 (24...Rce8!? 25.Bd5 ed5 26.Qd5 Qd5 27.Rd5 c4+/–) 25.Be6+/– Ne6 26.Qe6 Kh8 27.Rac1 Qf4 28.Qe3 h6 (28...Qf5!?+/–) 29.Rd7 Qa4 30.Qe5 Threatening mate: Qxg7 30...Rg8 31.Qb2 (better is 31.Rd6!? Kh7 32.Qf5 Kh8 33.Qd3+/–) 31...Rcd8+= 32.Re7 Rd1 33.Re1 Rc1 34.Rc1 Rd8 Threatening mate... how? 35.Rf1 Rd1 (35...Rd3 36.h3+=) 36.f3 Rf1 37.Kf1 Qd1 38.Kf2 c4 39.Qe5 (39.h3!?+=) ½–½. Kivimaeki,J – Vahtera,Antti, Finland, 1996.

5.Be2 Bd6 6.c4 (6.d4 0-0=) 6...dc4 7.Bc4 c6 (7...0-0 8.d4+=) 8.d4= b5 (8...0-0 9.0-0=) 9.Be2 (9.Bd3 a5 10.Qc2 Bb7=) 9...a5 10.ba5 Qa5 11.Nbd2 (11.Bd2 b4=) 11...0-0+= 12.0-0 e5 13.Bb2 ed4 14.Nd4 Qc7 15.h3 (15.Rc1 A) 15...Ba3? 16.Ba3 (16.Rc6?! Qb8 17.Ba3 Ra3+/–) 16...Ra3 17.Nb5+– (17.Nc6?! Ne5 18.Nd4 Qe7+/–; 17.Rc6?! Qb8+/–); B) 15...Nc5=) 15...Rd8 (15...Nc5 16.Qc2=) 16.Qc2 Bb7 (16...Nc5 17.Bf3 Bd7 18.Rfc1=) 17.Rfc1 Nc5 18.Nf5 Bf8 (18...Bh2 19.Kh1 Rd2 20.Qd2+/–) 19.Bf6+= gf6 20.Nf3 Rd5 21.N3d4 Ra4 22.Ng3 (22.Bf3 Rd7+/–) 22...Kh8 (22...Rg5 23.Rd1+=) 23.Bg4 Rg5 24.Nh5 Rg6 25.Bf5 Rh6 26.Nf4 Rd4 (26...Bd6 27.Nd3+/–) 27.ed4 Qf4 28.dc5 Rh5 29.Qb3 Rf5 (29...Qf5? 30.Qf7 Rg5 31.Qf8 (31.Qb7?! Qf3 32.g3 Rg3 33.fg3 Qg3 34.Kf1 Qf3 35.Ke1 Qe3 36.Kd1 Qd3 37.Ke1 Qe3 38.Kd1 Qd3 39.Ke1 Qe3=) 31...Rg8 32.Qh6+–) 30.Qf7 Qf2 31.Kh1 Rg5 32.Ra2 (32.Qf8? Rg8 33.Ra2 Qf4 (33...Rf8? 34.Rf2 Kg7 35.Rd2+–; 33...Qa2?! 34.Qf6 Rg7 35.Qf8 Qg8 36.Rf1–+) 34.Qg8 Kg8–+) 32...Qf4 33.Rd1 (33.Qf8? Rg8 34.Qd6 Qc1 35.Kh2 Qf1–+) 33...Rg8 34.Qb7 (34.Qb7 Qe4 35.Qf7+/–) 1–0. Cirulis,Ilmars (1865) – Faust,Dieter (1825), FICGS, 2016.

5.Bb2 0-0=.

5.c4 0-0 6.c5 b6 7.d4 a5 8.Bb2+=.

5.c4 0-0 6.c5 b6 7.d4 bc5 (7...a5 8.Bb2+=) 8.bc5= c6 9.Nc3 Qc7 10.Qc2 Nbd7 11.Be2 e5 12.Nh4 e4 13.Nf5 Re8 14.Bd2 Nf8 15.Ne7 Re7 16.Qa4 Bg4 17.Ba6 Ree8 18.Na2 Bc8 19.Ba5 Qd7 20.Be2 Rb8 21.Bc3 Qc7 22.Nb4 Re6 23.0-0 Ng4? (better is 23...N8d7+=) 24.Bg4+– Rh6 25.f4 (25.h3 a5 26.Nc6 Qc6 27.Qc6 Rc6 28.Bc8 Rbc8 29.Ba5 Nd7+–) 25...ef3 (25...Bg4 26.Na6 Qb7 27.Nb8 Qb8 28.Ra2+–) 26.Bf3 Qh2 27.Kf2 Qh4 (27...Qc7 28.Rae1+–) 28.Ke2 Qg5 (28...Bd7 29.Qa7 Re8 30.Qa6+–) 29.Qa7 Rb5 (29...Rb7 30.Qa8 Qd8 31.Kd2+–) 30.Qc7 (better is 30.Bd5!? Rb7 31.Bf7 Kh8+–) 30...Re6 31.Bd2 (31.Qc8 Qe3 32.Kd1 Qc3 33.Qe6 Rb4 34.Qf7 Kf7 35.Bd5 Ke7 36.Rf7 Ke8 37.ab4 Qa1 38.Kc2 cd5 39.Rg7 Qa4 40.Kc3 Qa3 41.Kc2 Qb4–+) 31...Ba6 32.Kf2 (better is 32.Na6 Re3 33.Kd1+–) 32...Qf5 (32...Rb7 33.Qf4 (33.Na6?! Rc7 34.Nc7 Re7+–) 33...Qf4 34.ef4 Bf1 35.Kf1+–) 33.Kg1 (better is 33.Na6 Qd3 34.Ra2+–) 33...Rb4 34.ab4 Qd3 1–0. Sebald,Ralph – Wundahl,Juergen, Dortmund op–B, 1999. (=1.Nf3 Nf6 2.b4 e6 3.a3 d5 4.e3 Be7)

5.c4 0-0 6.c5 b6 7.d4 c6 8.Ne5 Nfd7 9.Nd3 bc5 10.bc5 e5 11.Be2 (11.Bb2 Ba6+=) 11...Bf6–/+ 12.Bb2 e4 13.Nb4 a5 14.Nc2 Nc5 15.0-0 (15.dc5 Bb2 Pinning (15...Bb2 Deflection)) 15...Ba6 16.Ne1 Na4! 17.Bc1 (17.Qa4 Be2 Deflection) 17...Be2 18.Qe2 c5 19.Ra2 (19.Nc2 Qb6–+) 19...c4 (better is 19...cd4!? 20.ed4 Qb6 21.Qc2 Qd4 22.Be3–+) 20.Qc2 Qd7 21.f3 ef3 22.Rf3 Na6 23.Rh3 g6 24.Qf2 Qe6 25.e4 (25.Rf3!? Bg7 26.Qc2–+) 25...Qe4 26.Re2?? (26.Nc2 Bg7 27.Nd2–+) 26...Bd4 (26...Qb1!? 27.Qf6 Qc1 28.Re5–+) 27.Be3 Be3 (27...Qb1 28.Bd4 f6 29.Re7+=) 28.Ree3 (28.Qe3 Qe3 29.Rhe3–+) 28...Qb1 29.Rh7 (29.Qh4 h5 30.g4 Rae8 31.gh5 Re3 32.Re3 Qb6–+) 29...Qb6 (better is 29...Kh7 30.Qh4 Kg7 31.Qd4 Kg8 32.Qd5–+) 30.Reh3 (30.Rhh3 Rae8–+) 30...Qf2 31.Kf2 N6c5 32.Nf3 Ne4 33.Kg1 (33.Ke3 Nac3–+) 33...Rae8 0–1. Gamez Cobo,F (1705) – Jimenez Bernal,Francisco (2090), Jaen–ch Linares, 1997. (=1.Nf3 Nf6 2.b4 d5 3.e3 e6 4.a3 Be7)

5.c4 a5!? 6.b5 Nbd7+=.

5.c4 c5 6.bc5= Bc5 7.d4 Be7 8.Nc3 dc4 9.Qa4 Bd7 10.Qc4 Nc6 11.Qd3 (11.Bd2 Rc8 12.Qa2 0-0+=) 11...0-0 12.g3 (12.Be2 h6=) 12...Rc8 (12...Qa5 13.Bb2 e5 14.de5 Ne5 15.Ne5 Qe5 16.Bg2+=) 13.Bd2 Na5 14.Bg2 Nc4 15.Bc1 (better is 15.0-0!?+=) 15...Qa5–/+ 16.0-0 Ne3! 17.fe3 (17.Be3 Rc3 Discovered attack; 17.Qe3 Nd5 Double attack (17...Rc3 Discovered attack; 17...Nd5 Decoy); 17.fe3 Rc3 Discovered attack) 17...Qc3 (17...Rc3!? 18.Qb1 Bb5–+) 18.Qb1 Qc2 19.Rf2 (19.Qb7 Rb8 20.Qa6–+) 19...Qb1–+ 20.Rb1 Ne4 21.Rfb2 Nc3 (21...Ba3!? 22.Ne5 Bb2 23.Bb2–+) 22.Ra1–/+ b6 23.Ne5 Ba4 24.Bd2 Nd5 25.e4? (better is 25.Bf3!?–/+) 25...Nc3–+ 26.Bf3 Rfd8 27.Be3 f6 28.Nd3 Nb5 29.d5 ed5 30.ed5 Rc3 31.Be4?? (better is 31.Rd2–+) 31...Nd6 32.Bd4 (32.Rb4 Bc2 33.Rc1 f5–+ (33...Bd3?! 34.Rc3 Be4 35.Rc7–+; worse is 33...Rd3 34.Bd3 Bd3 35.g4–+)) 32...Ne4 33.Bc3 Nc3 34.Nb4 (34.Rc1 Nd5 35.Rd2 Ne3–+) 34...Nd5 (34...a5 35.Na6 Nd5 36.Re1–+) 35.Nd5 (35.Rd2 Bc5 36.Kh1 Kf7–+) 35...Rd5 36.Re2 Kf7 37.Re4 (37.Kg2 Rd3–+) 37...Bc5 38.Kf1 Bb5 39.Ke1 Re5 (better is 39...Rf5!? 40.Kd2–+) 40.Re5 fe5 41.a4 Bc6 42.Ke2 Ke6 43.a5 e4 44.ab6 (44.g4 Bd4 45.Ra3 b5–+) 44...Bb6 45.Rb1 (45.Kd2 e3 46.Ke1 a5–+) 45...Ke5 (45...Bd4 46.g4–+) 46.Rb4 (46.h3 Bd4 47.Rc1 Kd5–+) 46...Kd5 (46...Bd4 47.Rb8–+) 47.h3 (47.Rb3 Bd4 48.Ra3 Bb5 49.Kd2 e3 50.Ke1 Bc4–+) 47...g5 (better is 47...Bd4 48.Rb3–+) 48.h4 (48.Kd1–+) 48...gh4 49.gh4 0–1. Semenov,Mikhail – Doronina,Elena, Vladivostok op, 2008. (=1.Nf3 Nf6 2.b4 d5 3.e3 e6 4.a3 Be7)

5.c4 Nbd7 6.d4 0-0 7.Bb2 c6 8.Nc3 a5 9.b5 c5 10.Rc1 b6 11.cd5 ed5 12.dc5 Nc5 13.Nd4 Bb7 14.Be2 Qd7 15.Na4 Na4 16.Qa4 Bc5 17.0-0 Rfc8 18.Nf3 Ne4 19.Rfd1 Qe7 20.Bd4 Ba3=+ 21.Rc2 Bc5 22.Rdc1 Bd4 23.Qd4 Nc5 24.Nd2 a4 25.Kf1 Re8 26.Bf3 Qd7 27.Rb1 Ra5 28.e4? Rb5 29.Rcb2 Rb2 30.Rb2 Ba6 (30...Ba6 31.Kg1 Qc6–+) 0–1. Champion,William R – Rozanski,Boleslaw, corr Poland–USA, 1987.

5.Be2 0-0 6.Bb2=.

5.Be2 a5 6.b5 Nbd7 7.a4 (7.Bb2 Bd6=) 7...0-0 (7...e5 8.0-0=) 8.0-0 (8.d4 Ne4=) 8...e5 9.d4 e4 10.Nfd2 (10.Ne5 Ne5 11.de5 Ne8=) 10...c5 11.c4 (11.Bb2 c4=) 11...cd4 12.ed4 dc4 13.Nc4 Nb6 14.Bb2 (14.Ba3 Nc4 15.Bc4 Bd6=) 14...Nc4 (14...Be6 15.Nbd2+=) 15.Bc4= Bf5 (15...Bg4 16.Qb3=) 16.Re1 (16.Qb3 Bd6=) 16...Bb4 17.Bc3 (17.Nd2 Qd6 18.Re2 Rac8+=) 17...Qd6 (17...Bc3 18.Nc3 Rc8 19.Qb3 Qd4 20.Nd5 Qc4 21.Qc4 Rc4 22.Ne7 Kh8 23.Nf5–/+) 18.Qb3 (18.Qd2 Bc3 19.Qc3 Rad8+=) 18...Bc3 19.Qc3 Ng4 20.g3 (20.h3 Qh2 21.Kf1 Rac8+=) 20...Rad8 (20...Rfd8 21.h3 Nf6 22.g4–/+) 21.d5 (21.h3 Nf6 22.g4 Bg6+=) 21...Qh6–/+ 22.h4 Rfe8 (better is 22...Qd6–/+) 23.Re3? (better is 23.Qa5 e3 24.f3–+) 23...Ne3–+ 24.Qe3 Qf6 25.Nc3?? (25.Ra2–+) 25...Rc8 0–1. s0g – marekt, internet, 2008.

5.bc5 Bc5 6.d4 Bd6 7.Nc3 0-0 8.Bg2 Nc6 9.0-0 b6 10.Nb5 Be7 11.c4 Ba6 (worse is 11...dc4 12.Ne5 Ne5 13.Ba8+=) 12.Qa4 Bb5 13.cb5 Nb8 14.Bf4 Nbd7 15.Rac1 Nh5 16.Bd2 f5 17.Rc6 Rf6 18.Ne5 Ne5 19.de5 Rg6 20.Bf3 Bg5 21.Bh5 Bd2 22.Bg6 hg6 23.Re6 f4 24.Qd4 Ba5 25.Rg6 fg3 26.fg3 Qe8 27.Qd5 Kh7 28.Rg4 Rd8 29.Rh4 Kg6 30.Qe4 Kg5 31.Qf5# 1–0. usingprogram (1980) – dmitriy (1725), kurnik, 2011.

5.bc5 Bc5 6.d4 Bd6 7.Bf4 0-0 8.Bd6 Qd6 9.Bg2 Bd7 10.Qd3 a6 11.0-0 Bb5 12.Qe3 Rc8 13.a4 Be8 14.Rc1 Rc4 15.a5 Qc7 16.c3 Ra4 17.Ra4 Ba4 18.c4 dc4 (18...Qa5 19.cd5 Qd5 20.Nc3+–) 19.Ne5 Nc6 20.Nc4 (worse is 20.Rc4 Qa5 21.Qc1 Nd5+=) 20...Nd7 21.Nba3 Rc8 22.Ra1 Na5 23.Na5 Qa5 24.Rc1 (24.Bb7? Rc3 25.Qf4 Qb4 26.Ba6 Qb2–+) 24...Rc1 25.Qc1 b5 26.Nb1 b4 27.Nd2 Bb5 28.e3 Qa3 29.Qc8 Nf8 30.Qc2 Qc3 31.Qd1 b3! 32.Bf1 (32.Qb3 Qd2 Deflection; 32.Nb3 Ba4 Decoy) 32...b2 (32...Qc2!? 33.Qc2 bc2 34.Nb3–+) 33.Bb5–/+ ab5 34.Nb3 Nd7 35.Kf1? (better is 35.h3–+) 35...Qc4 36.Ke1 Nf6 37.Nd2 Qc1 (37...Qc1 38.Ke2 Ne4 39.Qc1 bc1Q (39...bc1B?! 40.Ne4 Ba3 41.Kd3+=) 40.Ne4 Qc2 41.Nd2 b4–+) 0–1. Fantoni,Franco – Smith,Barry, friendly UECC Email, 1998. (=1.Nf3 Nf6 2.g3 d5 3.b4 e6 4.a3)

5.bc5 Bc5 6.d4 Bd6 7.Bf4 b6 8.e3 (8.Bg2 Bf4 9.gf4 Qc7+=) 8...Ba6 (8...Bf4 9.gf4 0-0 10.Nbd2+=) 9.Ba6 Na6 10.Bg5 (10.Bd6 Qd6 11.Nbd2 b5+=) 10...Be7 (10...b5 11.Qd3 Rb8 12.Nbd2+=) 11.Qd3 Nc7 12.Nbd2 (12.0-0 0-0+=) 12...0-0 (12...b5 13.0-0+=) 13.0-0 Rc8 (13...b5 14.Bf6 Bf6 15.Rfb1+=) 14.Bf6 (14.c4 Nd7 15.Be7 Qe7=) 14...Bf6 15.c4 dc4 16.Nc4 Nd5 (16...Re8 17.Nce5=) 17.Rfc1 b5 18.Ncd2 (18.Nce5 Be5 19.Ne5 Qa5=) 18...a6 (18...Qa5 19.Nb3 Rc1 20.Rc1 Qa3 21.Qb5=) 19.Nb3 Be7 20.a4 (20.Rc8 Qc8 21.Rc1 Qa8=) 20...ba4 (20...Nb4 21.Qe4=) 21.Rc8 (21.Nc5 Qa5 22.Qa3 Nb6+=) 21...Qc8 22.Ra4 Nb4 23.Qd1 Qc6 (23...Qc3 24.Ra1=) 24.Ra5 (24.Na5 Qd5+=) 24...Bd6 (24...Rc8 25.Nc5=) 25.Nfd2 Rb8 ½–½. Riepe,Bernhard (2050) – Schwenger,Kurt (1950), Telechess, 2004.

5.bc5 Bc5 6.d4 Bd6 7.Bf4 Bf4 8.gf4 Qa5 9.Qd2=.

5.bc5 Bc5 6.d4 Bd6 7.Bg2 0-0+=.

5.bc5 Bc5 6.d4 Be7 7.Bg2 0-0 8.0-0 Nc6 9.Qd3 b6 10.Bf4 Na5 11.Nc3 Nc4 12.e4 a5 (worse is 12...Ba3 13.ed5 Bb2 14.Qc4 ed5 15.Qb3 Ba1 16.Ra1+–) 13.ed5 (13.Ne5 Ne5 14.de5 Ba6 15.ef6 Bd3 16.fe7 Qe7 17.cd3 d4–/+) 13...ed5 (better is 13...Ba6!? 14.Rfe1 Na3–/+ (worse is 14...Nd5 15.Nd5 ed5 16.a4=; worse is 14...ed5 15.Bg5=)) 14.Ne5+= Ba6 (better is 14...Be6!?+=) 15.Nc6+/– Qd7 16.Nd5! Nd5 17.Bd5 Ne5? (better is 17...Bd6 18.Bc4 Bc4 19.Qc4 Bf4+–) 18.Ne7+– (18.Ne5?! Qd5 19.c4 Qb7+/–) 18...Qe7 19.Qe4 Bf1 (19...Rad8 20.Be5 (20.Qe5?! Qe5 21.Be5 Bf1+=) 20...Bf1 21.Rf1 Qa3 22.c4+–) 20.Ba8 (20.Rf1?! Ra7 21.Be5 b5+–; 20.Kf1?! Rac8 21.Be5 Qd7+–; 20.Qe5?! Qe5 21.Be5 Rad8+=; 20.de5?! Rae8 21.Rf1 g5+–; worse is 20.Be5 Rad8 21.Rf1 Qa3+–) 20...Ng6 21.Kf1 Qd7 (21...Qa7 22.Bc6+–) 22.Be3 (22.Bc6 Qh3 23.Kg1 Nf4 24.Qf4 Qe6+–) 22...Re8 (22...Qb5 23.Kg1+–) 23.Bc6 Re4 24.Bd7 (24.Be4 Qb5 25.Bd3 Qb2+=) 24...f5 (24...Re7 25.Bc6 Rc7 26.d5+–) 25.Bf5 (25.Bf5 Re8 26.Rb1+–) 1–0. usingprogram (1985) – mieczmag, kurnik, 2012.

5.Bb2 A) 5...Nf6 6.e3 (6.Rg1 Rg8 7.e3 a5 8.ba5 Nbd7 9.Ne5–/+; 6.Bg2 c5 7.b5 a6 8.ba6 Ra6 9.0-0–/+) 6...a5 7.b5 Bd6 8.Rg1 0-0 9.Ne5–/+; B) 5...f6 6.d4 (6.h3 Nh6 7.Rg1 e5 8.Nc3 Be6 9.e3–/+; 6.Nc3 e5 7.h3 Nh6 8.Rg1 Be6 9.Bg2–/+) 6...a5 7.b5 Nh6 8.Nc3 Be7 9.Rg1–/+; C) 5...c5 6.Rg1 (6.e3 Nf6 7.Rg1 Rg8 8.bc5 Bc5 9.c4–/+; 6.bc5 Bc5 7.e3 0-0 8.Rg1 f5 9.Ne5–/+) 6...h5 7.bc5 Bc5 8.e3 Rg8 9.Ne5+=; D) 5...Rg8 6.e3 (6.Rg1 Nf6 7.Bg2 Nbd7 8.d3 c5 9.bc5–/+; 6.Bg2 c5 7.e3 cb4 8.ab4 Bd7 9.c3–/+) 6...Nf6 7.Rg1 a5 8.ba5 Nbd7 9.Ne5–/+.

5.Nc3 A) 5...a5 6.Bb2 (6.b5 d4 7.Nb1 Qd6 8.c3 e5 9.Bg2–/+; 6.ba5 d4 7.Ne4 e5 8.e3 Qd5 9.Ng3–/+) 6...Nc6 7.Rg1 Nce5 8.Nb5 Nc4 9.Bc3–/+; B) 5...Nf6 6.Bg2 (6.Rg1 Rg8 7.Bb2 Nbd7 8.e3 e5 9.Rg2–/+; 6.Bb2 Nbd7 7.Rg1 e5 8.Bh3 c6 9.e4–/+) 6...a5 7.b5 Bd6 8.d4 Nbd7 9.0-0–/+; C) 5...Nd7 6.Rg1 (6.e4 a5 7.b5 de4 8.Ne4 Ndf6 9.Nf6–/+; 6.d4 Ngf6 7.Bf4 c6 8.e3 Nh5 9.Bg5–/+) 6...Nde5 7.Ne5 Ne5 8.d4 Ng6 9.h3–/+; D) 5...d4 6.Ne4 (6.Na2 Nc6 7.Bg2 Nce5 8.Ne5 Ne5 9.d3–/+; 6.Nb1 Nc6 7.Bg2 Nce5 8.Ne5 Ne5 9.d3–/+) 6...e5 7.e3 Qd5 8.d3 f5 9.Ng3–/+.

5.d4 Bd6 (5...Nf6 6.Bf4 (6.Rg1 Bd7 7.Bf4 a5 8.ba5 c5 9.e3–/+; 6.Nbd2 c6 7.c4 a5 8.Rb1 ab4 9.ab4–/+) 6...Nh5 7.Bg3 Ng3 8.hg3 a5 9.b5–/+; 5...Bd7 6.e3 (6.Rg1 Nf6 7.Bf4 a5 8.ba5 c5 9.dc5–/+; 6.Bf4 a5 7.Rg1 Nf6 8.ba5 c5 9.dc5–/+) 6...Nf6 7.Rg1 a5 8.b5 c6 9.bc6–/+; 5...a5 6.b5 (6.Rg1 Nf6 7.b5 Bd7 8.e3 c6 9.Nc3–/+; 6.ba5 Nf6 7.Rg1 Ra5 8.Nbd2 Nc6 9.c4–/+) 6...Bd6 7.c4 dc4 8.e4 h5 9.h3=) 6.Nc3 (6.Rg1 Nh2 7.Nh2 Bh2 8.Rg7 h6 (8...Qf6+= 9.Rg2–/+) 9.Nc3–/+; 6.Nbd2 a5 7.b5 c5 8.e4 cd4 9.ed5–/+; 6.Bg5 Nf6 7.Nbd2 a5 8.Bf6 Qf6 9.e4–/+) 6...0-0 (6...a5 7.b5–/+ Nf6 8.Rg1 Rg8 9.Bg5–/+) 7.Rg1 Nf6 (7...f5 8.h3 Nh2 9.Nh2–/+) 8.Qd2 (8.Bh6 Ne8 9.e4+=) 8...b6 (8...a5 9.Qg5 g6 10.b5+=) 9.Qh6 Kh8?? (better is 9...Ne8+=) 10.Qg7# 1–0. bicycle – khani9, ChessWorld.net, 2007.

5.Rg1 A) 5...h5 6.d4 (6.Bb2 Rg8 7.Nc3 a5 8.ba5 Ra5 9.e4–/+; 6.h3 Nf6 7.d4 a5 8.b5 Bd7 9.e3–/+) 6...Qd6 7.h3 Nh2 8.Nh2 Qh2 9.Rg5–/+; B) 5...Nh6 6.d3 (6.Bb2 f6 7.Bh3 Rg8 8.Bg2 g5 9.h3–/+; 6.d4 Nf5 7.Bf4 a5 8.b5 f6 9.h4+=) 6...Nf5 7.e4 Nh4 8.Nbd2 Nf3 9.Nf3+=; C) 5...Nf6 6.d4 (6.e3 Nbd7 7.Bb2 a5 8.b5 Rg8 9.c4–/+; 6.Bb2 a5 7.b5 Rg8 8.e3 Nbd7 9.c4–/+) 6...Bd7 7.Nbd2 a5 8.ba5 Ra5 9.e3–/+.

5.h3 Nf6 6.d4 (6.Rg1 Nbd7 7.d4 c6 8.Bd2 Rg8 9.e3–/+; 6.Bb2 Bd6 7.Nc3 Bd7 8.Rg1 Rg8 9.e3–/+) 6...a5 7.b5 Bd6 8.Rg1 Rg8 9.c4–/+.

4.Bb2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 Be7 4.Nf3).

4.Bb2 0-0 5.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 Be7 4.e3 0-0 5.Nf3).

4.c4 a5 5.Qa4 A) 5...0-0 A1) 6.Bb2 d5 (6...Na6 7.Qa5 d5 8.cd5 Bd7 9.d6 Bd6 10.Qg5 c5 11.e3 h6; 6...d6 7.Nc3 e5 8.Nd5 Nbd7 9.e3 e4 10.Nd4 Ne5 11.Qc2 Re8) 7.cd5 ed5 8.Nc3 Be6 9.b5 Nbd7 10.Ng5 Nc5 11.Qc2 d4; A2) 6.e3 d5 (6...Na6 7.Bb2 d5 8.cd5 ab4 9.ab4 ed5 10.b5 Bd7 11.Ne5 Nb4) 7.cd5 Nd5 8.Bb2 Nb6 9.Qb3 ab4 10.ab4 Ra1 11.Ba1 Nd5; A3) 6.Nc3 Na6 (6...d5 7.Bb2 Nbd7 8.e3 dc4 9.Qc2 ab4 10.ab4 Ra1 11.Ba1 Nb6; 6...d6 7.Bb2 e5 8.Nd5 Nd5 9.cd5 Nd7 10.e3 h6 11.Bd3 Nf6) 7.c5 d6 8.cd6 Bd6 9.Qb5 c6 10.Qc4 Bd7 11.b5 Nc5; B) 5...b6 B1) 6.b5 Bb7 (6...0-0 7.Nc3 Bb7 8.Qc2 d5 9.e3 Nbd7 10.cd5 Nd5 11.Nd5 Bd5; 6...d6 7.d4 0-0 8.Nc3 Bb7 9.e3 Ne4 10.Bb2 Nd7 11.Bd3 f5; 6...d5 7.cd5 ed5 8.Nd4 0-0 9.Nc3 Re8 10.d3 Nbd7 11.Nc6 Nc5; 6...Bd6 7.Nc3 Bb7 8.Bb2 0-0 9.g3 Bc5 10.Bg2 d6 11.e3 e5) 7.d4 0-0 8.Nc3 d5 9.Bf4 Nbd7 10.g3 Ne4 11.Bd2 Nd2; B2) 6.d4 0-0 (6...Bb7 7.b5 c5 8.bc6 Nc6 9.Nc3 0-0 10.e3 d5 11.Be2 dc4; 6...h6 7.Nc3 Bb7 8.b5 0-0 9.Bf4 d6 10.h3 Nbd7 11.Qc2 Re8) 7.Nc3 Bb7 8.b5 d5 9.e3 c5 10.bc6 Nc6 11.Bb2 Rc8; B3) 6.Nc3 0-0 (6...Bb7 7.b5 0-0 8.Qc2 d6 9.g3 Nbd7 10.Bg2 Ne5 11.0-0 Nc4; 6...h6 7.b5 0-0 8.g3 d5 9.d4 Nbd7 10.Bg2 Bd6 11.0-0 Bb7) 7.b5 d6 8.d4 Bb7 9.e3 Ne4 10.Bb2 Nd7 11.Bd3 f5; C) 5...Na6 C1) 6.Bb2 b6 7.Nc3 Bb7 8.b5 Nc5 9.Qc2 0-0 10.g3 Nfe4 11.d4 f5; C2) 6.Qa5 d5 7.b5 b6 8.Qa4 Bd7 9.Qc2 Nc5 10.e3 Na4 11.Nc3 Nc3; C3) 6.c5 ab4 (6...b6 7.Nc3 ab4 8.ab4 c6 9.Rb1 0-0 10.d4 Nc7 11.Qb3 Ncd5) 7.ab4 b5 8.Qa3 Bb7 9.Qb2 Nd5 10.d4 0-0 11.Na3 f5; C4) 6.Qb5 0-0 (6...c6 7.Qe5 ab4 8.ab4 Bb4 9.Nc3 0-0 10.Qg3 d6 11.Bb2 e5; 6...ab4 7.ab4 0-0 8.Nc3 d5 9.Bb2 c6 10.Qa5 b6 11.Qa4 Bb7; 6...Ne4 7.d3 Bf6 8.Ra2 Nd6 9.Qa5 b6 10.Qa4 Bb7 11.Qb3 0-0) 7.Qa5 d5 8.b5 b6 9.Qa4 Bd7 10.Qc2 Nc5 11.e3 Nfe4; C5) 6.Nc3 0-0 (6...ab4 7.ab4 c5 8.bc5 Nc7 9.Qa8 Na8 10.Ra8 Bc5 11.d4 Bb4) 7.ba5 Nb8 8.Rb1 Nc6 9.Rb5 b6 10.e3 Na5 11.Bd3 Ba6.

4.c4 a5 5.b5 0-0 6.d4 (6.Nc3 d5 (6...h6 7.d4 d5 8.Qd3 dc4 9.Qc4 Nbd7 10.Bf4 Bd6 11.Bd6 cd6) 7.d4 Nbd7 8.e3 Ne4 9.Bb2 Nb6 10.c5 Nc4 11.Bc4 Nc3; 6.d3 d5 (6...h6 7.Nc3 d5 8.g3 Nbd7 9.Bg2 Nb6 10.0-0 dc4 11.dc4 Qd6; 6...d6 7.Nc3 Nbd7 8.g3 d5 9.Bg2 Nb6 10.cd5 Nfd5 11.Bd2 Bf6) 7.Nc3 Nbd7 8.Qc2 dc4 9.dc4 Bd6 10.e4 b6 11.Be2 Qe7; 6.Qc2 d5 (6...d6 7.Nc3 Nbd7 8.e4 e5 9.Be2 Nc5 10.0-0 Bg4 11.h3 Bh5; 6...Re8 7.Nc3 d5 8.e3 Nbd7 9.Be2 dc4 10.Bc4 Nb6 11.Be2 Qd6; 6...h6 7.Nc3 d5 8.e3 Nbd7 9.Be2 dc4 10.0-0 Nb6 11.Ne5 Bd7; 6...g6 7.d4 d5 8.c5 c6 9.Nc3 cb5 10.Nb5 Nc6 11.Bf4 Ne4) 7.Nc3 Nbd7 8.e3 g6 9.Bb2 Nb6 10.cd5 ed5 11.Bd3 Bg4; 6.h4 d5 (6...h6 7.Nc3 d5 8.d4 Nbd7 9.cd5 ed5 10.g3 Bd6 11.Bg2 Nb6; 6...c6 7.Nc3 d5 8.Bb2 Nbd7 9.Qc2 Nc5 10.e3 a4 11.bc6 bc6; 6...Re8 7.Nc3 d5 8.d4 Nbd7 9.c5 Ne4 10.Qd3 Ndf6 11.Bf4 h6) 7.Nc3 d4 8.Na4 Qd6 9.Bb2 e5 10.Qb3 Ng4 11.b6 c5) 6...d5 (6...h6 7.Nc3 d5 8.Qd3 dc4 9.Qc4 Nbd7 10.Bf4 Bd6 11.Bd6 cd6; 6...Re8 7.Nc3 d5 8.Qd3 dc4 9.Qc4 Nbd7 10.Bf4 Bd6 11.Bd6 cd6) 7.e3 (7.Nc3 Nbd7 8.cd5 Nd5 9.Nd5 ed5 10.Bf4 Nf6 11.Qc2 Bd6) 7...Bd7 (7...Nbd7 8.cd5 (8.Nbd2 c6 9.Bd3 dc4 10.Bc4 Nb6 11.bc6 Nc4) 8...ed5 9.Bd3= (9.Nc3 Nb6 10.Bd3 Qd6 11.0-0 Be6) 9...Ne4 10.0-0 Bf6 11.Be4 de4; 7...c5 8.Nc3 Nbd7 9.cd5 Nd5 10.Bb2 N7f6 11.Nd5 ed5) 8.Nc3 Ne4 (8...c6 9.bc6 (9.Bb2 dc4 10.Bc4 cb5 11.Nb5 Qb6) 9...Bc6 (9...Nc6 10.Bd2 Qc7 11.Rc1 Ne4) 10.cd5 (10.Ne5 Qc7 11.c5 Be8) 10...Nd5 11.Nd5 Qd5 12.Bd3=) 9.Bb2 (9.Ne4 de4 10.Nd2 f5= 11.Be2 Be8) 9...Nc3= (9...c6 10.cd5 ed5 11.Bd3 Nc3) 10.Bc3 c6 (10...dc4 11.Bc4 c6 12.Qb1=; 10...g6 11.cd5 ed5) 11.a4 (11.cd5 ed5 12.bc6 Nc6=) 11...cb5 (11...Qc7 12.Qb3=; 11...Bb4+=) 12.ab5 dc4 13.Bc4 Qc7 14.Qb3 Rc8 15.Nd2 Na6? (better is 15...Bd6!?=) 16.ba6+/– b5 17.Bb5 (17.Ba5!? Ra6 18.Bc7 Ra1 19.Nb1 Rc7 20.Qb2 Rc4 21.Qa1 Rc1 22.Ke2 Rh1 23.Qa7 Rb1 24.Qd7+/–) 17...Bb5= 18.Qb5 Qc3 19.Ke2 (19.Qa5? Qa5 20.Ra5 Rc1 21.Ke2 Rh1–+) 19...Bb4 20.Ne4 Qc2 21.Kf3 f5 22.Ng3 g5 (22...Qc4 23.Qd7 Rd8 24.Rhc1 Qa6 25.Qc6+=) 23.h3 Rcb8 (23...Qc4 24.Qc4 Rc4 25.Rac1 Rc1 26.Rc1 Ra6 27.e4=) 24.Qd7 (better is 24.Qe5 Qc6 25.d5 Qd5 26.Qd5 ed5 27.Nf5 Ra6 28.Rhd1=) 24...Re8 (better is 24...g4 25.hg4 fg4 26.Kg4 Qg6 27.Kh4 Qf6 28.Kh3 Qh6 29.Kg4 Qg6 30.Kh3 Qh6 31.Kg4 Qg6=) 25.Rac1+/– Qd3 26.a7 Rad8 (26...f4!? 27.Nh5 Qg6+=) 27.Qb7 (27.Qc6 Ra8+–) 27...Rf8+/– 28.Nh5 Rf7 29.Qb6 Qe4 30.Ke2 Rdf8 31.f3 Qd5 32.Rc2 f4 (32...Qd7 33.Rhc1 Qa7 34.Qe6+–) 33.Rhc1+– Qb3?? (better is 33...Ba3 34.Rc8 Bc1+–) 34.ef4 gf4 (34...e5 35.Rc8 ed4 36.a8Q Qe3 37.Kf1 Qc1 38.Rc1 Ra8 39.Rc7+–) 35.Rc8 Qe3 36.Kf1 Bd2 (36...e5 37.a8Q Qc1 38.Rc1 Ra8+–) 37.a8Q Bc1 38.Rf8 Rf8 39.Nf6 Kg7 40.Qc7 Rf7 41.Qg8 Kh6 42.Ng4 Kh5 43.Qcf7 Kh4 44.Ne3 Be3 45.Qfh7 1–0. pierre – gnu, internet, 2011.

4.c4 a5 5.b5 d5 A) 6.e3 0-0 (6...Nbd7 7.Nc3 Nc5 8.Bb2 0-0 9.d4 Nce4 10.Qc2 c6 11.Bd3 cb5; 6...h6 7.Nc3 0-0 8.Qc2 Nbd7 9.Bb2 Bd6 10.Be2 Nb6 11.cd5 ed5; 6...Bd6 7.Nc3 0-0 8.d4 Ne4 9.Bb2 Nd7 10.c5 Be7 11.Bd3 Ndf6; 6...g6 7.Nc3 0-0 8.Bb2 Nbd7 9.Qc2 Nb6 10.cd5 ed5 11.Bd3 Bg4; 6...Qd6 7.Nc3 0-0 8.d4 c5 9.Be2 Nbd7 10.0-0 b6 11.Qc2 Bb7) 7.Nc3 Nbd7 8.Qc2 Nb6 9.cd5 Nbd5 10.Bb2 g6 11.Bd3 Bd7; B) 6.Nc3 0-0 (6...Nbd7 7.cd5 ed5 8.d4 0-0 9.e3 Nb6 10.Bd3 Be6 11.0-0 Qd6; 6...c6 7.d3 0-0 8.Bf4 Nbd7 9.bc6 bc6 10.Nd4 Ra6 11.Nf3 Nh5; 6...h6 7.d4 0-0 8.Bf4 Nh5 9.Bd2 Nf6 10.cd5 ed5 11.g3 Bf5) 7.e3 Nbd7 8.Qc2 b6 9.cd5 ed5 10.d4 Bb7 11.Bd3 Bd6; C) 6.d4 dc4 (6...0-0 7.Nc3 Nbd7 8.e3 Ne4 9.Bb2 Ndf6 10.Qc2 c6 11.Bd3 cb5) 7.e3 Nbd7 8.Bc4 0-0 9.0-0 Nb6 10.Bd3 Bd7 11.Ne5 g6; D) 6.cd5 ed5 7.Nc3 0-0 8.e3 Be6 9.Nd4 Qd6 10.Ne6 Qe6 11.Be2 Nbd7; E) 6.Qc2 Nbd7 (6...dc4 7.Qc4 Nbd7 8.d4 Nb6 9.Qd3 0-0 10.h3 c5 11.bc6 bc6; 6...0-0 7.Nc3 Nbd7 8.e3 Nb6 9.cd5 ed5 10.Be2 Bg4 11.h3 Bh5; 6...h6 7.Nc3 0-0 8.e3 Nbd7 9.Bb2 Bd6 10.Be2 Nb6 11.cd5 ed5) 7.Nc3 dc4 8.e3 Nb6 9.Ne5 0-0 10.Bb2 Nfd5 11.Nc4 f5.

4.c4 b6 5.e3 c5 6.b5 Bb7 7.d3 0-0 8.Bb2 d5 9.Nbd2 Nbd7 10.Be2 Qb8 11.0-0 Ne8 (11...a6 12.ba6 Ra6 13.Rb1=) 12.a4 (12.Qc2 Nd6=) 12...a5 13.Rc1 (13.Qc2 Nef6=) 13...Nd6 (13...Nef6 14.Qc2=) 14.Ne5 (14.cd5 Bd5 15.Qc2 Qd8+=) 14...Ne5= 15.Be5 f6 16.Bg3 e5 17.d4 (17.cd5 Bd5 18.Bg4 Qd8+=) 17...Nf5 (17...cd4 18.ed4 Nf5 19.Nb3=) 18.cd5 (18.Bg4 Ng3 19.fg3 Rd8 20.cd5 cd4 21.Be6 Kh8+=) 18...cd4 19.e4 (19.Bc4 Ba3 20.Ra1 Bc5=) 19...Ng3 20.hg3 (20.fg3 f5+=) 20...f5+= 21.ef5 (21.Bd3 Bg5+=) 21...Bg5 (21...Bd5!? 22.Bf3 Qd6+=) 22.f4= ef4 23.Ne4 (23.Nf3 Rf5 24.Ng5 Rg5 25.gf4 Rf5 26.Qd4 Qd6+/–) 23...Bh6 (23...Rf5 A) 24.Qd4?! A1) worse is 24...Bd5 25.gf4 (25.Ng5?! Rg5 26.Bc4 Qb7=) 25...Bf4 26.Ng3 Bg3 27.Rf5+–; A2) 24...Rd5?? 25.Bc4 (25.Qb6?! f3 26.Ng5 Rg5 27.Bf3 Bf3 28.Qb8 Rb8 29.Rf3 Rg4+/–) 25...Qd8 26.gf4+–; A3) 24...Qe5 25.Qe5 Re5=; B) 24.Bg4 Qe5 25.Bf5 Qf5 26.Qd4 Bd5 27.Rc7+–) 24.Qd4 f3 (24...Rf5 25.Bg4 (25.Qb6?! Bd5 26.Qb8 Rb8+/–) 25...Rf8 26.Be6 Kh8 27.g4+– (27.Qb6?! Qe5+/–)) 25.Bf3 (25.Rf3 A deflection 25...Bc1) 25...Bc1 26.Rc1 Rf5 Attacking the isolated pawn on d5 27.Qb6 Bd5 28.Nf6 (28.Qb8!? Rb8 29.Nd6+=) 28...Rf6= The mate threat is Qxb6 (worse is 28...gf6 29.Bd5 Rd5 30.Qe6 Kg7 31.Qd5+–) 29.Bd5 Kh8 30.Qc5 (30.Qb8 Rb8 31.Rc7 Rd6+=) 30...Rf5 31.Qc6 Rd5 (better is 31...Rf8!? 32.Qc7 Qc7 33.Rc7 Rfc8 34.Rc8 Rc8+=) 32.Qd5+/– Qb6 33.Qc5 Qe6 34.b6 Re8 35.b7 Qb3 36.Qh5 Do you see the mate threat? 36...g6 (36...Qa4 37.Rc8 Qd4 38.Kh2 g6 39.Re8 Kg7 40.Rg8 Kg8 41.b8Q Kf7 42.Qc7 Ke6 43.Qe2 Kf5 44.Qf3 Kg5 45.Qc1 Qe3 46.Qce3) 37.Qf3 Qb6 (37...Qe6+–) 38.Kh2 g5 (38...Qe6+–) 39.Qc6 Qe3 40.Qe8!! (40.Qe8 Qe8 41.Rc8+–) 1–0. Gurgenidze,Bukhuti – Kalatozashvili, Soviet Union, 1973.

4.c4 c5 5.bc5= Bc5 (5...Qa5 6.Nc3=) 6.e3 d5 7.d4 Be7 8.Nbd2 0-0 9.Bd3 b6 (9...Nc6 10.0-0=) 10.Ne5 (10.0-0 Nc6+=) 10...Bb7= 11.0-0 Nbd7 12.f4 Rc8 13.Bb2 dc4 14.Bc4 (14.Ndc4 b5 15.Nd2 Nd5 16.Nd7 Qd7=+) 14...Nd5 15.Rf3 (15.Bd5 Bd5 16.Nd3 Bb7=+) 15...Ne5–/+ 16.fe5 (16.de5 Qd7 17.Qe2–/+) 16...Bg5 (16...b5 17.Bb5 Nc3 18.Bc3 Bf3 19.Qf3 Rc3 20.Ne4 Ra3 21.Ra3 Ba3 22.Bd3–+) 17.Qe2 (17.Qb3 f5=) 17...g6 (17...b5 18.Bd3 (worse 18.Bb5 Rc2 19.Rb1 Qb6–+) 18...Nc3 19.Bc3 Bf3 20.Bh7 Kh8 21.Qd3=+) 18.Rc1 (18.a4!?=) 18...b5=+ 19.Bb5?? (better 19.Bb3 Rc1 20.Bc1–/+) 19...Rc1–+ 20.Bc1 Nc3 21.Qd3 Nb5 (21...Bf3?! 22.Nf3 Nb5 23.Qb5–+) 22.Qb5 Bf3 (better 22...Qc7 23.Rf1 Be3 24.Kh1 Bd4–+) 23.Nf3 Be7 (23...Qb8 24.Qd3 Be7 25.Bd2–+) 24.e4 (24.Bd2 Qc7–/+) 24...Qc7–+ 25.Bh6 Rb8 26.Qa4 (26.Qd3 Qa5–+) 26...Qb6 (26...g5 27.Qd1 (27.Bg5 Bg5 28.Qd1 Be3 29.Kh1 Qb7–+) 27...Qc3 A) 28.Bg5 Bg5 (28...Ba3?! 29.Kf2–/+; 28...Qa3?! 29.Be7 Qe7 30.Qe1–/+) 29.Ng5 Qe3 30.Kf1 Rc8–+; B) 28.h3 Qe3 29.Kh2 Qf4 30.Kg1 Qe4 31.Qd2 Qb1 32.Kh2–+) 27.h3 (27.Kf2!? a6–+) 27...Qb1–+ 28.Kh2 Qe4 29.Qd7? (29.Qa7 Qb7 30.Qa4–+) 29...Qb7 30.Qb7 (30.Qa4 Rc8–+) 30...Rb7 31.Kg3 (31.a4–+) 31...Ba3 32.Be3 (32.Nd2 Bb2–+) 32...Rb3 (32...a5!? 33.Kf4–+) 33.Kf4 Rc3 (33...Bf8 34.Bd2 Bh6 35.Ke4 Bd2 36.Nd2–+) 34.h4 (34.d5 Rc4 (worse 34...ed5 35.Ba7 Bc1 36.Kg3–+) 35.Kg3 ed5 36.Ba7 Bb2–+) 34...h5 (34...a5 35.Ke4 Bc1 36.Bd2 Bd2 37.Nd2–+) 35.Ng5 (35.d5 Rc4 36.Kg3 ed5 37.Ba7 Bb2–+) 35...Bf8 36.Ke4 (36.g3 a5 37.Bd2 Ra3–+) 36...Bh6 37.Bf4 (37.Kf4 a5 38.Bd2 Ra3–+) 37...Bg5 38.hg5 (38.Bg5 Rg3 39.Bd8 Kf8–+) 38...Kf8 39.g3 (39.Be3 Ke7–+) 39...Ke8 40.Be3 (40.Bd2 Rg3 41.Kf4 h4–+) 40...Kd7 (40...Re3 41.Ke3 Kd7 42.Kd3–+) 41.Kf3 (41.Bf4 Ra3–+) 41...Kc6 42.Ke2 Kd5 43.Kd2 Ra3 0–1. Cubok,Zdenek (1915) – Helis,Tadeusz (2340), Karvina op, 2006. (=1.Nf3 Nf6 2.b4 e6 3.a3 Be7)

4.c4 d5 5.e3 0-0 6.d4 a5 7.b5 c5 8.Bb2 Nbd7 9.Nbd2 cd4 10.Bd4 Re8 (10...b6 11.cd5 Nd5 12.Bc4=+) 11.Be2= b6 12.0-0 Bb7 13.Ne5 (13.Qb1 Rc8=+) 13...Ne5 14.Be5 Nd7 (14...Rc8 15.h3=+) 15.Bb2 Bf6 16.Bf6 Qf6 (16...Nf6 17.cd5 Bd5 18.Rc1=+) 17.cd5 ed5 (17...Bd5 18.e4 Bb7 19.Nc4=) 18.Nf3= Rac8 19.Qd4 Qd4 20.Nd4 g6 21.Rac1 ½–½. Cubok,Zdenek (1915) – Grzenia,Jerzy (2090), Karvina op, 2006. (=1.Nf3 Nf6 2.b4 e6 3.a3 Be7)

4.d4 (--> 1.b4 Nf6 2.d4 e6 3.a3 Be7 4.Nf3).

4.e3 0-0 5.c4 b6 6.Bd3 Bb7 7.0-0 d5 8.Nc3 c5 9.Ne5 (better is 9.bc5!? Bc5 10.Bb2=) 9...cb4–/+ 10.ab4 Bb4 11.Bb2 Nbd7 12.Nd7 Qd7 13.h3? (better is 13.Qb3 a5 14.Ba3–/+) 13...dc4–+ 14.Bc4 Qc6 15.Qe2?? (15.Qf3 Qf3 16.gf3 Bf3 17.Ba6–+) 15...Qg2 0–1. Kissick,Philip HE – Richardson,Ryan, corr WS/O/096 ICCF, 2006.

4.e3 0-0 5.c4 d5 6.Bb2 Nbd7 7.d4 Ne4 8.Nbd2 f5 9.Be2 c6 10.0-0 Bd6 11.Ne5 Ndf6 12.f3 Nd2 13.Qd2 Bd7 14.Qe1 Be8 15.Bd3 Nd7 16.e4 de4 17.Nd7 Qd7 18.fe4 Bg6 19.e5 Bc7 20.Rd1 Rad8 21.Be2 b5 22.Bf3 Bb6 23.Kh1 Bf7 24.Rf2 Rfe8 25.Rc2 Rc8 26.Qh4 Bd8 27.Qf2 Be7 28.g3 Rc7 29.h4 g6 30.Qg2 Rec8 31.Qf1 a6 32.Bc1 Kg7 33.Rd3 Kg8 34.Be3 Bd8 35.Rdc3 Kg7 36.Qc1 Be8 37.Bh6 Kg8 38.Qd1 Bf7 39.Rh2 Be7 40.Rd2 Rd8 41.Be3 Kg7 42.cb5 cb5 43.Rc7 Qc7 44.Rc2 Qb8 45.Qc1 Be8 46.Rc7 Bd7 47.Rb7 1–0. Santasiere – Fink, New York 1946.

4.e3 0-0 5.c4 d6 6.Qc2 (6.d4 c5=) 6...Nbd7 (6...a5 7.b5=) 7.Be2 (7.d4 a5 8.b5 c5=) 7...b6 (7...a5 8.Bb2=) 8.Nc3 (8.0-0 c5=) 8...Bb7 (8...e5 9.0-0=) 9.0-0 c5 10.Bb2 (10.e4 d5 11.cd5 cb4 12.ab4 Bb4 13.de6 Bc3 14.dc3 Be4 15.ef7 Rf7=) 10...Rc8 (10...Ne5 11.e4=) 11.h3 (11.b5 Ra8=) 11...a6 (11...Bf3 12.Bf3 Ne5 13.Bb7 cb4 14.ab4 (worse is 14.Bc8 bc3 15.Qc3 Qc8–+) 14...Rc4 A) worse is 15.Ra7 Qb8 (15...Rb4?! 16.Rfa1+=) 16.Qa4 Rb4 17.Qb4 Qa7–+; B) 15.d4+=) 12.b5 Qc7 (12...Ra8 13.ba6 Ra6 14.Rfb1=) 13.ba6 Ba6 14.a4 (14.d3 d5=) 14...Qb8 (14...Ra8 15.Rfb1=) 15.Rfb1 (15.d3 Qc7+=) 15...Qc7 16.Nb5 Bb5 (16...Qd8 17.Bc3+=) 17.ab5 Ra8 18.d3 d5 (18...Ra1 19.Ra1 d5 20.Qc3+=) 19.Ra6 Ra7 (19...Ra6 20.ba6 Ra8 21.Ra1+=) 20.Rba1 Rfa8 21.d4 (21.Qa4 Ra6 22.ba6 Ra7+=) 21...Nb8 (21...cd4 22.Ra7 Ra7 23.Ra7 Qa7 24.Nd4+=) 22.Ra7+/– Ra7 23.Ra7 Qa7 24.dc5 (better is 24.Bd3+/–) 24...Bc5? (24...bc5 25.Bd3+=) 25.cd5 (better is 25.Bf6!? gf6 26.cd5+–) 25...Nd5+/– 26.Ng5 g6 27.e4 f6? (27...Qc7 28.Bc4 Qf4 29.ed5 Qg5 30.de6 Kf8 31.ef7 Nd7+–) 28.Ne6 (28.ed5 ed5 29.Qb3 Bf2 30.Kf2 fg5+–) 28...Nb4 (28...Nc7 29.Nc5 bc5+–) 29.Qc4 (29.Qc4 Qf7 30.Nc5 bc5 31.Qc5+–) 1–0. pcmvr – jromero, net–chess.com, 2017.

4.e3 0-0 5.Be2 b6 6.0-0 c5 7.b5 a6 8.c4 ab5 9.cb5 d5 10.Bb2 Nbd7 11.d4 c4 12.Nfd2 Qc7 13.f4 Bd6 14.Nc3 Bb7 15.Qe1 Ra5 16.Bf3 Rfa8 17.Ndb1 Ne4 18.Be4 de4 19.Ra2 Nf6 20.Bc1 Qe7 21.Qh4 Ba3?? (better is 21...Nd5 22.Qf2 Nc3 23.Nc3 Bd5–/+) 22.Ba3+= Ra3 23.Ra3 Ra3 24.Na3 Qa3 25.Qe1 Nd5 26.Nd5 (worse is 26.Ne4 A) worse is 26...Ne3 27.Rf3 Ng2 28.Nf6 (worse is 28.Kg2 Qa8 29.Ng5 h6–/+) 28...Kf8 29.Nh7 Ke8 30.Qe6 fe6 31.Ra3+=; B) 26...Qe3 27.Qe3 Ne3+=) 26...Bd5 27.Qc1 (27.f5 ef5 28.Rf5 Be6+=) 27...Qb3= 28.Rf2 Qd3 29.Rc2 Qb3 30.Rb2 Qa3 31.Rb1 Qa5 32.Kf2 h6 33.Qc2 Qa3 34.Qb2 Qe7 35.Kg1 Qc7 36.Rc1 Qd7 37.Qb4 Qa7 38.Qb2 (38.Rc4?? Qa1 39.Kf2 Qa2 40.Ke1 Bc4–+) 38...Qd7 39.Rc3 Qe7 40.Ra3 g5 41.fg5 hg5 42.Ra6 Qc7 43.Qc3 Kg7 44.Ra1 f5 45.g3 Kg6 46.Ra2 Qd7 47.Qb4 c3 48.Rc2 f4 49.gf4 gf4 50.Rg2 (50.Rc3?! e5+/–) 50...Kf6?? (50...Kf7 51.Qc3 (51.ef4?! e3 52.Qc3 Bg2 53.Kg2 e2+=) 51...f3 52.Rg5+–) 51.Qc3 (51.Qf8 Qf7 52.Qd8 Qe7 53.Qh8 Kf7 54.Qg8 Kf6 55.Qg6) 51...f3 52.Rg3 (52.Rg4 Kf7 53.Rg5+–) 52...Kf5? (better is 52...Qb5 53.Qc2 Qc4 54.Qc4 Bc4+/–) 53.Qb2 Qc7 54.Kf2 Qc4 55.h4 Qd3 56.h5 Bc4 57.Rg1 Bb5? (better is 57...e5+–) 58.h6 Qc4 (58...e5 59.d5! Qd5+–) 59.h7 Qc8 60.Rg8 (60.Rg8 Qc4 61.Kg1+–; 60.Qb5 Kf6 61.Qe5 Kf7 62.Rg7 Kf8 63.h8Q) 1–0. Conlon,R – Brooks,Brandon, Flint–ch MI class–B, 1992. (=1.Nf3 Nf6 2.b4 e6 3.a3 Be7)

4.e3 0-0 5.Be2 b6 6.c4 Bb7 7.0-0 d5 8.cd5 ed5 9.Nc3 c6 10.Bb2 Nbd7 11.d4 Re8 12.Ne5 Bd6 13.f4 Qc7 (worse is 13...Be5 14.fe5 Qe7 15.Qd3+–) 14.Rc1 Qd8 (14...Ne5? 15.de5 (15.fe5?! Be5 16.de5 Qe5+/–) 15...Qe7 16.Qc2+–) 15.Bf3 Rc8 (15...Be5? 16.fe5 Qe7 17.Qe2+–) 16.Qb3 a6 (16...Be5? 17.fe5 Qe7 18.Rf2+– (worse is 18.ef6 Qe3 19.Kh1 Nf6+/–)) 17.e4 de4?? (better is 17...Bc7+=) 18.Nf7+– (18.Qf7?! Kh8 19.Ne4 Bc7+–) 18...Qe7 19.Nd6 Kh8 (19...Qe6 20.Bd1 Kf8 21.Qe6 Re6 22.Nb7+–) 20.Nc8 (20.Nb7?! ef3 21.Rf3 Rc7+–) 20...Rc8 21.Ne4! Ne4 22.Rfe1 Ndf6 23.d5! cd5 (23...cd5 24.Rc8 Pinning; 23...Nd5 24.Re4 Deflection) 24.Rc8 Bc8 25.Bf6 Qf6 (25...gf6 26.Qd5 f5 27.Be4 fe4 28.Re4+–) 26.Qd5 Qf8 (26...Be6 27.Qe4 Bg8 28.Qe5+–) 27.Re4 (27.Re4 h6 28.Bh5+–) 1–0. Wilk,Zdenek (1650) – Vontina,Maria, OP–2012–0-02183, 2012.

4.e3 d5 5.c4 dc4 6.Bc4= Nbd7 7.Bb2 0-0 8.d4 b6 9.Nbd2 Bb7 10.Qb3 (10.0-0 c5 11.Qb3 Qc7+=) 10...Bd5 (10...a5 11.0-0=) 11.0-0+= a5 12.b5 Rc8 (12...Qc8 13.Rac1+=) 13.Bd5 ed5 14.Rac1 Re8 15.e4 (15.Ne5!? Ne5 16.de5+=) 15...Ne4 16.Qd5 Nd2 17.Nd2 Nf6 18.Qd8 Red8 19.Rc6 (19.Rfe1 Kf8=) 19...Nd5 20.Nf3 (20.Re1 Re8=+) 20...h6 (20...Re8 21.Rd1=+) 21.g3 Bd6 22.Rfc1 Re8 23.R6c2 (23.Ne5 Rb8=) 23...Re6 24.Ne5 Rce8 25.Kf1 f6 (worse 25...Be5 26.de5 R6e7 27.Ke2+=) 26.Nc4 Bf8 27.Kg2 Re2 (27...Kf7!?=+) 28.Re2+= Re2 29.Kf3 Re6 30.Ne3 Ne3 31.fe3 Bd6 32.e4 Re7 33.a4 Kf7 34.e5 (34.Bc3 Rd7+=) 34...fe5= 35.de5 Bc5 36.Rd1 Ke6 37.Ke4 Rf7 38.Rd2 Rf1 39.Re2 ½–½. Bernardt,Rainer Georg (1805) – Grabitz,Georg (1630), Wuerttemberg–ch Seniors, 2003. (=1.Nf3 Nf6 2.b4 e6 3.a3 Be7)

4.g3 d5 5.Bg2 a5 6.b5 c6 7.a4 0-0 8.0-0 cb5 9.ab5 Qc7 10.Bb2 Nbd7 11.d4 Nb6 12.Na3 Bd7 13.Ne5 Na4 14.Qb1 Nc3 15.Qe1 Nb5 16.Nd7 Qd7 17.Nb1 Qc7 18.Qd2 Nd6 19.Na3 b5 20.c3 b4! 21.cb4 ab4 22.Qb4 Nde4 23.Nb5? (better is 23.Qe1–/+) 23...Qb7 (23...Bb4?! 24.Nc7 Ra5 25.Na6 Ra1 26.Ra1=) 24.Qb3 Nd2 25.Qd3 Nf1 26.Bf1 Ra1 27.Ba1 Rc8 28.Bb2 Rc4 29.Ba3 Ba3 30.Na3 Rc1 31.f3 (31.Nb5 Qc6–+) 31...g6 (better is 31...Qb4 32.Nc2 Qb1–+) 32.Kf2?? (32.Qd2 Qc6–+) 32...Qb4 (better is 32...Qb2–+) 33.Nc2 Qb2 34.Ne3 h5 35.Nd1 Qa1 36.Ke1 Kg7 37.e3 Ne8 38.Be2 Nd6 39.Kf2 Nc4 40.Qb3? (better is 40.e4–+) 40...Qa5 41.Qd3 h4! 42.gh4 (42.e4 hg3 43.hg3 Nb2 44.Nb2 Qe1 45.Ke3 Rc3 46.Qc3 Qc3 47.Nd3 de4 48.fe4 Qa1–+) 42...Qd8 (better is 42...Nb2! 43.Qb3 Nd1 44.Qd1 Rd1 45.Bd1 Qd8–+) 43.Kg3 Qd6 44.f4 Qb4 45.Kf2? (45.h5 Qe1 46.Kh3–+) 45...Nd2 (better is 45...Nb2 46.Qa6 Nd1 47.Bd1 Rd1–+) 46.Kg2 Ne4 47.h5 Qe1 48.hg6? (48.Bg4 f5 49.Qe2 Rd1 50.Qe1 Re1–+) 48...fg6 (48...Nc3 49.gf7 Ne2 50.Qa3 Qg1 51.Kh3 Kf7 52.Qa7 Kf6 53.Qb8 Rd1 54.Qf8 Kg6 55.f5 Kg5 56.Qg7 Kf5 57.Qe5 Kg6 58.Qe6 Kh7 59.Qf7 Qg7 60.Qg7 Kg7 61.Kg2–+) 49.Bf3? (better is 49.Bg4–+) 49...Nc3 50.Qa6 (50.Qf1 Qf1 51.Kf1 Nd1 52.Ke2–+) 50...Nd1 51.Bd1 Qd1 52.Qe6 (52.Kg3 Qg1 53.Kf3 Qh1 54.Kf2 Rc2 55.Qe2 Qh2 56.Kf3 Qe2 57.Kg3 Qe3 58.Kg4 Rg2 59.Kh4 Qg3) 52...Rc2 (52...Qe2 53.Kh3 Qh5 54.Kg2 Rc2 55.Kg3 Qh2 56.Kg4 Rg2 57.Kf3 Qg3) 53.Kg3 Qg1 54.Kf3 (54.Kh4 Kh6 55.Qg6 Qg6 56.h3 Rg2 57.e4 Qf6) 54...Qg2 0–1. Seleznev,Yury (1700) – Babici,Roman (2225), Centrocoop op, 1997. (=1.Nf3 Nf6 2.b4 e6 3.a3 Be7)

5.Bb2 d6 (5...a5 6.b5=+) 6.e3= b6 (6...a5 7.b5=) 7.d4 Bb7 8.Nc3 Nbd7 9.Bd3 a6 10.0-0 c5 11.Rb1 b5 (11...Qc7 12.Qc2+=) 12.cb5 a5 (better 12...cb4!? 13.ab4 ab5 14.Bb5 Nb6+=) 13.bc5+- dc5 14.Qe2 Nd5 (14...cd4!? 15.Nd4 Ne5 16.Rfd1+-) 15.Nd5 Bd5 16.e4 Bb7 17.Rfd1 Rc8 18.Bc4 Nf6?? (18...Qc7+-) 19.dc5 Bc5 (19...Qe8 20.c6 Bc6 21.bc6 Qc6+-) 20.Rd8 Rcd8 21.Ng5 Rd7 (21...Bb6+-) 22.Bf6 gf6 23.Nh7! Kh7 24.Qh5 Kg7 (24...Kg8 25.Qg4 Kh7 26.Rb3 Be3 27.Re3 Rd1 28.Bf1 Rd3 29.Rd3 Be4 30.Rh3) 25.Qg4 Kh7 (25...Kh6 26.Rb3 Be3 27.Re3 Rd1 28.Bf1 Rd3 29.Rd3 Be4 30.Rh3) 26.Rb3 f5 (26...Rd1 27.Bf1 Rf1 28.Kf1 Be3 29.Re3 Be4 30.Rh3) 27.Rh3 1-0. pcmvr - lefou (2145), net-chess.com, 2021.

5.d4 a5 6.b5 c5=.

5.e3 a5 6.b5 c6 7.d4=.

5.e3 a5 6.b5 d5 7.Bb2 c5 (7...c6 8.Nc3=) 8.Qc2 (8.d4 Nbd7=) 8...b6 9.d3 dc4 (9...Nbd7 10.Be2=) 10.dc4 Bb7 11.Nbd2 (11.Bd3 Bf3 12.gf3 Ra7+=) 11...Nbd7 12.Bd3 Qc7 13.Rg1 (13.0-0 Rfd8=) 13...Bd6 (13...Rfd8 14.g4 Nf8 15.0-0-0=) 14.0-0-0 (14.g4 A) worse is 14...Bh2 15.Rh1+/– (15.Nh2?! Qh2 16.0-0-0 Rfd8+=); B) 14...Ne5 15.Be5 Be5+=) 14...Ne5 (14...h6 15.g4=) 15.Be5+= Be5 16.g4 h6 (16...Kh8 17.g5 Ne8 18.Be4=) 17.h4 (17.g5 hg5 18.Rg5 Bh2+–) 17...Bh2 (17...Nd7 18.g5 h5 19.Ne5 Qe5 20.Be2+=) 18.Rg2 (18.Nh2 Qh2 19.g5 hg5 20.hg5 Nd7+/–) 18...Bd6 (18...Be5!?+/–) 19.g5+– Ne8 (better is 19...hg5!? 20.hg5 Nd7+–) 20.gh6 f5 21.Rdg1 Rf7 22.h5 Kh8 (22...Qe7 23.hg7 Qf6 24.Kb1+–) 23.Qc3 e5 24.hg7 Ng7 25.Rg6 Raf8 (25...Re8 26.Ng5 Rff8 27.Rh6 Kg8 28.Rh7+–) 26.Rh6 (26.h6 Ne8 27.Ng5 Rf6+–) 26...Kg8 27.Nh4 Rd8 28.Ng6 Rf6 29.f4 Re8 30.e4 (30.Rh8 Kf7 31.fe5 Re5 32.Ne5 Be5+–) 30...Kf7 31.ef5 Bf8 (31...Qb8 32.fe5 Be5 33.Ne5 Qe5 34.Qe5 Re5 35.Rh7 Re1 36.Re1+–) 32.Ne4 (32.fe5 Rg6 33.hg6 Ke7 34.f6 Kd7+–) 32...Rg6 33.hg6 Ke7 34.f6 Kd8 35.Rh8 Be4 36.Be4 Bd6 37.fg7 Qg7 38.Qd2 Rh8 39.Qd6 Kc8 40.Qc6 (40.Qc6 Kb8 41.Qa8 Kc7 42.Qb7 Kd6 43.Rd1 Ke6 44.Qc6 Ke7 45.Rd7 Ke8 46.Qc8) 1–0. Taulien,Hans_Juergen – Brueske,Thomas, remoteschach.de, 2003.

5.e3 a5 6.b5 d5 7.d4 Nbd7 8.Nbd2 (8.cd5 ed5 9.Nc3 Nb6 10.Bd3 Qd6 11.0-0 Be6 12.Qe2 Rfe8 13.Bb2 g6 14.Rac1 Nh5; 8.Nc3 Ne4 9.Bb2 (9.Bd2 Re8 10.Bd3 Nc3 11.Bc3 dc4 12.Bc4 Nb6 13.Bd3 Nd5 14.Qc2 g6) 9...c6 (9...Nb6 10.Ne4 de4 11.Nd2 f5 12.Be2 Bd7 13.0-0 c6 14.a4 Qc7; 9...Ndf6 10.Bd3 Bd7 11.Qc2 Nc3 12.Bc3 dc4 13.Bc4 Qe8 14.Qd3 Nd5; 9...Nc3 10.Bc3 Nf6 11.Bd3 Bd7 12.0-0 dc4 13.Bc4 Ne4 14.Qd3 Nc3; 9...f5 10.cd5 Nc3 11.Bc3 ed5 12.Bd3 Nf6 13.0-0 Ne4 14.Qe1 Bd6; 9...c5 10.cd5 Nc3 11.Bc3 ed5 12.Bd3 c4 13.Bc2 f5 14.0-0 Nf6) 10.cd5 ed5 11.Qc2 Ndf6 12.bc6 bc6 13.Ne5 Bf5 14.Bd3 c5) 8...Ne4 (8...c5 9.Bd3= (9.bc6 bc6 10.Bd3 Rb8 11.0-0 Qc7 12.Qc2 Ba6 13.Bb2 c5 14.Rfc1 Rb7; 9.Bb2 cd4 10.Bd4 b6 11.cd5 Nd5 12.Bc4 Bb7 13.0-0 Rc8 14.Qe2 Nc5) 9...b6 (9...cd4 10.ed4 b6 11.0-0 Bb7 12.Bb2 Bd6 13.Re1 Rc8 14.Ne5 g6; 9...Qc7 10.0-0 b6 11.Bb2 Bb7 12.Rc1 Rac8 13.cd5 Nd5 14.g3 h6) 10.0-0 Bb7 11.Bb2 Bd6 12.h3 cd4 13.ed4 Ne4 14.Rc1 Rc8; 8...c6 A) 9.Bd3 dc4 (9...cb5 10.cb5 b6 11.Bb2 Bb7 12.0-0 Rc8 13.Qb3 Ne4 14.Rac1 Ndf6) 10.Bc4 Nb6 11.bc6 Nc4 12.Nc4 bc6 13.Nfe5 Ba6 14.Nc6 Qc7; B) 9.cd5 ed5 (9...Nd5 10.bc6 bc6 11.e4 N5f6 12.Be2 c5 13.0-0 cd4 14.Nd4 Bb7; 9...cd5 10.Bd3 b6 11.0-0 Bb7 12.Bb2 Rc8 13.Qb3 Ne4 14.Rac1 Ndf6) 10.Qc2 Qb6 11.bc6 Qc6 12.Ra2 Ne4 13.Bd3 f5 14.g3 Qh6; C) 9.c5 Qc7 (9...e5 10.Be2 ed4 11.ed4 Ne4 12.Qc2 Re8 13.0-0 Ndf6 14.Bd3 cb5) 10.b6 Qb8 11.Be2 e5 12.0-0 Re8 13.Bb2 ed4 14.ed4 Ne4; D) 9.bc6 bc6 10.Bd3 Qc7 11.Rb1 Ba6 12.0-0 c5 13.Bb2 cd4 14.ed4 dc4; E) 9.Qc2 cb5 10.cd5 Nb6 11.de6 Be6 12.Bb5 Qd5 13.a4 Rfc8 14.Qd1 Qf5; F) 9.Be2 cb5 (9...Qc7 10.Bb2 dc4 11.Bc4 c5 12.0-0 b6 13.Rc1 Bb7 14.Bd3 h6) 10.cb5 b6 11.Bb2 Bb7 12.0-0 Bd6 13.Rc1 Rc8 14.Qb3 Ne4; G) 9.Bb2 Qc7 (9...Ne4 10.Bd3 Nd2 11.Nd2 dc4 12.Bc4 Nb6 13.Bd3 cb5 14.Qb3 Bd7; 9...g6 10.Rc1 Rb8 11.cd5 Nd5 12.Bd3 N7f6 13.0-0 Bd7 14.bc6 bc6; 9...h6 10.c5 Ne4 11.Bd3 Ndf6 12.a4 Bd7 13.0-0 cb5 14.ab5 Qe8) 10.Bd3 c5 11.0-0 b6 12.cd5 ed5 13.dc5 Nc5 14.Qe2 Nfe4) 9.Bd3= (9.h3 f5 10.Bb2 Ndf6 11.Be2 dc4 12.Bc4 Nd6 13.Bd3 Bd7 14.a4 Nd5; 9.Qc2 f5 10.Bd3 Ndf6 11.0-0 Bd7 12.cd5 ed5 13.Ne5 Be6 14.f3 Nd6; 9.Bb2 Ndf6 (9...Nd2 10.Nd2 Nf6 11.Bd3 b6 12.0-0 Bb7 13.Qc2 Rc8 14.e4 de4; 9...c6 10.Qc2 Ndf6 11.bc6 Nd2 12.Nd2 bc6 13.Bd3 Ba6 14.0-0 Qc7; 9...h6 10.Bd3 Ndf6 11.0-0 Bd7 12.Ne5 Bd6 13.f3 Nd2 14.Qd2 dc4; 9...b6 10.Bd3 Bb7 11.cd5 ed5 12.0-0 Bd6 13.Ne5 Qe8 14.f4 Nd2; 9...Bd6 10.Bd3 Nd2 11.Nd2 b6 12.Qc2 g6 13.0-0 Bb7 14.e4 de4) 10.Bd3 b6 11.0-0 Bb7 12.Ne5 Nd2 13.Qd2 Bd6 14.cd5 Nd5) 9...Nd2 (9...f5 10.Bb2= Ndf6 11.0-0 Bd7 12.Ne5 dc4 13.Bc4 Nd6 14.a4 Nd5) 10.Bd2+= (worse is 10.Kd2 dc4 11.Bc4 e5–/+ 12.Qc2 ed4 13.Nd4 Ne5 14.Bb2 Nc4) 10...dc4 (10...Nb6 11.c5 Nc4 12.0-0 b6 13.Qc2 Nd2 14.Nd2 f5) 11.Bc4 Nf6 (11...Nb6 12.Bd3 f5 13.0-0 Nd5 14.Qb1 Bd7) 12.Qc2 Bd6 (12...b6 13.Ne5+= (13.0-0 Bb7 14.Bd3 Bf3) 13...Bb7 14.f3 Nd7) 13.e4+/– Be7 (13...Nd7 14.0-0 e5) 14.0-0 Ng4 (14...b6 15.Rfe1+/–; 14...h6+/–) 15.e5+– h5 (15...Qd7 16.h3 Nh6 17.Qe4+–) 16.Rfd1 Bh4 (16...c6 17.bc6 bc6 18.Qc1+–) 17.g3 Be7 18.h3 Nh6 19.Bh6 gh6 20.d5 Qe8 21.Qe4 Bc5? (21...ed5 22.Bd5 Be6 23.Bb7 Rb8+–) 22.Qf4 ed5 (22...Qe7 23.Qh6 f6 24.de6 Be6 25.Qg6 Kh8 26.Qh5 Kg7 27.Nh4 Bf2 28.Kg2+–) 23.Rd5 Be7 (23...Bb6 24.Rd2 Qe7 25.Qh6 a4+–) 24.Qh6 Bf5 25.e6 fe6 26.Rf5! Rf5 27.Be6 Qf7 28.Ne5 Rf6 29.Qg5 Kf8 30.Bf7 Rf7 31.Ng6 Kg8 32.Ne7 Kh8 33.Qe5 Rg7 34.Nf5 Rag8 35.Ng7 Kh7 36.Ne6 Kg6 37.Nf4 Kf7 38.Rd1 Rg3 39.fg3 Kg8 40.Qc7 h4 41.Rd8 1–0. Anonymous – comp, internet, 2011.

5.e3 b6 6.Nc3 Bb7 7.Be2 d5 8.0-0 dc4 9.Bc4 a6 10.d4 b5 11.Bd3 Nd5 12.Nd5 Bd5 13.e4 Bc4 (13...Bc6!?+=) 14.Bc4+/– bc4 15.Qc2 e5 16.Ne5 Bf6 (16...Qd4 17.Bb2 Qb6 18.Nc4+–) 17.Qc4 Be5 18.de5 Nd7 19.Bb2 Nb6 20.Qc2 a5 21.Rfd1 Qe8 (21...Qe7 22.b5+–) 22.Qc7 Na4 23.Bd4 ab4 24.ab4 Nc3 (24...Qe6+–) 25.Qc3 Ra1 26.Ra1 Qc8 (26...Qe6 27.b5 Rc8 28.Qd3+–) 27.Qc8 (27.Qc8 Rc8 28.b5+–) 1–0. Fritz 11 – anony, internet, 2013.

5.e3 d5 6.d4=.

3.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 g6).

3.d4 Bg7 4.Bb2 b6 5.e4 Bb7 6.Nf3 h6 7.Nbd2 c6 8.Be2 a6 9.0-0 d5 10.e5 Nd7 11.c4 dc4 12.Bc4 b5 13.Bb3 a5 14.Ne4 Bf8 15.h3 g5 16.Rc1 ab4 17.ab4 c5 18.dc5 Be4 19.Nd2 Bc6 20.Nf3 Bg7 21.Nd4 Nb8 22.Nc6 Nc6 23.Qe1 Qc7 24.f4 gf4 25.Rf4 Ne5 26.Be5 Be5 27.Re4 f6 28.Be6 Ke7 29.Bf5 h5 30.c6 Nh6 31.Bg6 Nf7 32.Qe2 h4 33.Qb5 Rab8 34.Qc5 Nd6 35.Re2 Rhg8 36.Bf5 Kf7 37.Qd5 Kg7 38.Be6 Rgf8 39.Rb1 Rb6 40.b5 Rfb8 41.Re5 fe5 42.Qe5 Kf8 43.Qf6 Nf7 44.Bc4 Rd8 45.Rf1 Re8 46.Bf7 Rb5 47.Be8 Ke8 48.Qf8# 1–0. pillsbury (2150) – beammeupscotty (2140), net–chess.com, 2014.

3.e4= Bg7 4.d4 b6 (4...Ne7 5.Nf3=) 5.Nf3+= Bb7 6.Bd3 Nc6 7.Be3 Qe7 (7...Nh6 8.0-0+=) 8.b5 Nd8 9.0-0 Nf6 10.Nc3 (10.e5 Ng4 11.Bd2 f6+/–) 10...0-0 (10...Ng4 11.Bf4 0-0 12.Bc4+/–) 11.Bg5 Qe8 12.Qe2 c6 (12...Ng4!?+/–) 13.e5+– Nd5 14.Ne4 f6 15.ef6 Nf6 16.Nd6 Qe7 17.Nb7 Nb7 18.bc6 dc6 19.Rfe1 Nd8 20.Bh4 Qd6 21.Bg3 Qe7 22.c3 Nd5 23.Qd2 b5 24.h4 Nf7 25.h5 Bh6 26.Qc2 Ng5 27.Ne5 Nf3?? (better is 7...gh5 28.a4 Rac8+–) 28.Nf3 Rf3 (28...Bf4 29.Bf4 Nf4 30.hg6 hg6 31.Be4+–) 29.gf3 Nf4 (29...Rf8 30.a4 b4 31.hg6 hg6 32.Bc4+–) 30.a4 Nd3 (30...ba4 31.Bc4 Kh8 32.Qa4+–) 31.Qd3 gh5 (31...b4 32.hg6 bc3 33.Re5+–) 32.ab5 h4 (32...cb5 33.Ra6 h4 34.Rae6+–) 33.Be5 Qg5 (33...cb5 34.Qb5 a6 35.Ra6 Ra6 36.Qa6 Kf7+–) 34.Kh1 Kf7 35.Qh7 Bg7 36.Rg1 (36.Rg1 a5 37.Rg5 Rg8 38.Bd6 Ke8 39.Qg8 Kd7 40.Rg7 Kd6 41.Qd8) 1–0. orane – TRENCH, caissa.com, 2006.

4.c4 b6 5.e3 Bg7 6.d4 Ne7 7.Nc3 c6 8.Nf3 0-0 9.Be2 d5 10.cd5 cd5 11.Rc1 a6 12.0-0 g5 13.Bd3 Nd7 14.Qc2+/– h6 15.Rfe1 Bb7 16.e4 h5 17.ed5+– Nd5 18.Re6 Nc3 19.Bc3 g4? 20.Nh4 Kf7 21.Rce1 Kg8 22.Bh7 Kh8 23.Ng6 Kh7 24.Nf8 Kg8 25.Nd7 Qd7 26.Re7 Qc6 27.R1e4 Kh8 28.f3 gf3 29.gf3 Rd8 30.Qg2 Rg8 31.Qg6 Qc3 32.Qh5?? Bh6= 33.Rg4 Rg4?? 34.Qg4+– Be3 35.Kg2 Qd2 36.Kh3 Bh6 37.Re8 Kh7 38.Qg8 1–0. mgriffin (1630) – eduardobandeira, net–chess.com, 2001.

4.c4 b6 5.g3 Bb7 6.b5?? (better is 6.Nf3=) 6...Bh1–+ 7.f3 Nh6 (7...Bc5 8.d4 Be7 9.Nh3–+) 8.g4 (8.Nh3–+) 8...f5 9.g5 (9.Nh3 Qh4 10.Nf2 Bc5–+) 9...Nf7 (better is 9...Qg5 10.Nh3 Qh4 11.Nf2 Rg8–+) 10.Bh8 Ng5 (better is 10...Nh8 11.Nh3 Bg7–+) 11.h4?? Nf7 12.d4 a6 13.d5 Nh8 14.Nh3 Qh4 15.Kd2 g5 16.Kc2 g4 17.fg4 fg4 18.Qd4 Nf7 19.Nf4 c5 20.Qc3 Qf2 21.Nd3 Qf1 22.Qd2 Bh6 23.Qc3 Qe2 24.Kb3 ed5 25.cd5 Bd5 26.Ka4 c4 27.Nc1 Qf1 28.Na2 ab5 29.Kb5 Qg1 30.Nb4 Ra5# (30...Qc5#) 0–1. pekindragons – bagboy, gameknot.com, 2012.

4.e3 Bg7 5.c4 Nh6 6.Nf3 Nc6 7.Be2 b6 8.d4 Bb7 9.Nbd2 Qe7 10.0-0 f5 11.Ne5 a5 12.Nc6 Bc6 13.Bf3 e5? (13...ab4!? 14.Bc6 dc6=) 14.Bc6 (14.d5 Bb7 15.d6 Bf3 16.Qf3+– (16.de7 Bd1 17.Rfd1 Ke7–/+)) 14...dc6+/– 15.de5 Be5 16.Be5 Qe5 17.Nf3 Qe6 18.Qc2 0-0 19.Rfd1 ab4 20.ab4 c5 21.b5 Rfd8 22.Rd8 Rd8 23.h3 Nf7 24.Ra7 Rd7 25.Qc3 Rd1 26.Kh2 Qd6 27.g3 Ne5?? (better is 27...Qe7+=) 28.Ne5 Rd2 (28...Qf6+–) 29.Ra8 (29.Ra8 Qd8 30.Rd8 Rd8 31.g4+–) 1–0. Fournier,Frederic – trompeto (1660), Active, 2006.

4.g4 Bg7 5.h4 Ne7 (5...d5 6.h5=+) 6.h5= 0-0 (6...gh5 7.Rh5 d5 8.e4=) 7.hg6+= hg6 8.e3 (8.Nf3 a5+=) 8...d5 9.Qf3 e5 10.Qh3 (10.Be2 Be6+=) 10...Qd7 11.Nf3 (better 11.d4!? ed4 12.Bd4=) 11...Qg4=+ 12.Qh7 Kf7 13.Be2 Rh8?? (better 13...Qf5 14.e4 Qe4 15.Be5 Bg4-/+) 14.Ne5! fe5 15.Bg4?? (better 15.Qh8 Qe2 16.Ke2 Bh8 17.Rh8+-) 15...Rh7= 16.Rh7 Bg4 17.Be5 Nf5 18.Bg7 (worse 18.Bc7 Kg8 19.Rg7 Kg7-/+) 18...Ng7 19.Rh8 Bh5 (19...Ne6 20.Nc3 c6 21.Rh7 Ng7 22.b5=) 20.Nc3+= Ne8 (better 20...c6!?+=) 21.Nd5+/- Nc6 22.Nf4 (better 22.Nc7 Nc7 23.Rh7 Kf6 24.Rc7+-) 22...Kg7= 23.Rh5 gh5 24.Nh5 Kf7 25.Nf4 Rd8 26.d4 Nf6 27.c4 Ne4 (27...Nd4 28.ed4 Rd4 29.Nd5 Rc4 30.Nf6 Kf6 31.Kd2=) 28.f3 Nf6 29.Kd2 (29.Ke2 Rh8+/-) 29...a5 (29...Ne5 30.Rc1 Nf3 31.Ke2=+) 30.b5 (30.Kc3 Rg8+/-) 30...Ne7 (better 30...Ne5!=) 31.Kd3 c6 32.a4 Ng6 (32...Nd7 33.Kc3+/-) 33.Ng6 Kg6 34.Rg1 Kf7 35.e4 cb5 36.ab5 Ke6 (36...Nd7 37.f4+/-) 37.e5 Nd7 38.Ke4 Kf7 (38...Ke7 39.c5 a4 40.c6 bc6 41.bc6+-) 39.f4 (39.c5 a4+-) 39...Nf8 (39...Nb6 40.Rc1+-) 40.f5 Rc8 (40...a4 41.c5 Ra8 42.d5+-) 41.c5 Rd8 (41...a4 42.Ra1 Ra8 43.Ra3+-) 42.e6 (42.d5!? a4+-) 42...Ne6 43.fe6 Ke6 44.d5! Kf7 (44...Rd5 45.Rg6 Deflection (45.Rg6 Decoy)) 45.Rf1 Kg7 (45...Ke7 46.d6 Ke6 47.Rh1+-) 46.Ke5 Re8 47.Kd6 1-0. black_bishop_88 (2450) - cmchaos (2255), lichess.org, 2020. (=1.a3 e6 2.b4 g6)

3.b5 c5 4.bc6= Nc6 5.Bf8 Kf8 6.Na3 Qe7 7.Qc1 Nf6 8.c4 Ne5 9.cd5 Nd5 10.e3 a6 11.Be2 Bd7 12.Nc2 Rc8= 13.Nf3?? Ng6 14.0-0 Nb4 15.Nfd4 e5 16.a3 Nc2 17.Nc2 Qc5 18.Nb4= Qe7 19.Qb2+= Qg5 20.Nd5 Bh3= 21.Bf3 h6 22.Qb7+/– Re8 23.Rfc1 Kg8 24.Rc7?? Be6?? 25.Nc3 Kh7 26.Ne4 Qd8 27.Ng3 Re7 28.Re7 Ne7 29.Be4 g6 30.Qa6 Qc8? 31.Nh5?? Bc4 32.Qf6+– Qf8 33.Qe5 Nc6 34.Nf6 (34.Nf6 Kg7 35.Bc6+–) 1–0. pinecrest1981 – RABALA, Live Game Caissa's Web, 2005.

3.b5 Nf6 4.Bf8= Rf8 5.Nf3 Bd7 6.e3 a6 7.Ne5 (better 7.ba6!? Na6 8.Ba6 Ra6 9.0-0=) 7...Bb5-/+ 8.Bb5 ab5 9.Qe2 c6 10.0-0 Nbd7 11.Nd3 c5 12.Nc3 c4 (12...b4 13.Nb5-/+) 13.Nc1 (13.Nb4 Qa5 14.Rfb1 Nc5=+) 13...Ne4 (13...b4 14.Nb5-/+) 14.Nb5 (14.Ne4 de4 15.d4 ed3 16.cd3 c3=+) 14...Qb6 (better 14...Qa5 15.a4 Nd2 16.Nd6 Ke7 17.Nb7 Qb4=+) 15.Nd4?? (15.a4 Nec5=) 15...Ndc5?? (15...Qb2 16.f3 Nd6 17.Ncb3 cb3 18.Rfb1-+) 16.f3? (16.a3 e5 17.Nf3 Qf6=) 16...Nf6?? (16...Nd6 17.Qe1 e5 18.Qh4-+) 17.d3? (17.a3 Rg8=+) 17...cd3?? (better 17...Qb2 18.dc4 Qa1-+) 18.cd3 Qa6 19.e4 (19.f4 Rg8+=) 19...de4= 20.fe4 e5 21.Nf5 Nfd7 (better 21...g6!? 22.Ne3 Nfd7=) 22.Ng7+/- Ke7 23.Qg4 Nd3 (23...Qg6 24.Qh4 f6 25.Nf5 Kd8+/-) 24.Qg5 (better 24.Nd3 Qd3 25.Rfd1+-) 24...f6+/- 25.Nf5 Ke6 (25...Kd8 26.Qh4 N3c5 27.Rb1+=) 26.Qg4 Kf7?? (better 26...Qb6 27.Kh1 N3c5+/-) 27.Nh6 (27.Qg7 Ke8 28.Qe7) 27...Ke8 (27...Ke7 28.Nd3 Qb6 29.Kh1+-) 28.Nb3 1-0. tunniato – FrancisChalas, lichess.org, 2021.

3.c4 dc4 4.Bb2 Nf6-/+ (4...Bb4? 5.Bg7 Nf6 6.Bh8+-).

3.c4 Be7 4.c5 Nf6 5.Bb2 (5.Nf3 0-0=+) 5...0-0 6.d3 b6 7.f3 (7.d4 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 c6=+) 7...Re8 (7...bc5 8.bc5 Bc5 9.d4-+) 8.e4 (8.d4-/+) 8...Nbd7 (8...bc5 9.e5 Nfd7 10.bc5 Bc5 11.d4-/+) 9.Qe2? (9.e5 bc5 10.bc5 Nh5=) 9...Nf8 (better 9...e5!?-+) 10.e5=+ N6d7 11.c6 (11.d4 a5-/+) 11...Nb8 (better 11...Bb4!? 12.Kd1 Nb8-+) 12.b5=+ a6 13.d4 (better 13.a4!?=+) 13...ab5-/+ 14.Qb5 (14.Qc2!?-/+) 14...Ba6-+ 15.Qb3 Bf1 16.Kf1 Nc6 17.Ne2 Nb4 (17...Na5 18.Qc3-+) 18.Bc1 (18.Ba3 Na6-+) 18...Qd7 (18...c5 19.Ba3 c4 20.Qc3-+) 19.Nbc3 (19.Bd2 Ra4-+) 19...c5 20.dc5 (20.Be3 Rec8-+) 20...bc5 21.Bd2 (21.Qd1 d4 22.Ne4 Ng6-+) 21...Reb8 22.a3 (22.Qd1 Ng6-+) 22...Nd3 23.Qc2 c4 24.Nd4 Bc5 25.Nce2 Qc7 26.a4 (26.f4 Rb2 (worse 26...Ba3 27.g3-+; worse 26...Ra3 27.Ra3 Ba3 28.Bc3-+) 27.Qd1 Qb6-+ (worse 27...Ba3 28.g3-+)) 26...Qe5 (worse 26...Ne5 27.Bf4-+) 27.f4 Qe4 28.Rg1 (28.Nf3 Nf2 29.Qe4 de4 30.Ne5 Nh1 31.Nc4-+) 28...Bd4 29.Rd1 (29.Ng3 Qg6 30.Bc3 Bc3 31.Qc3 Ra4 32.Rh1-+) 29...Nf4 (better 29...Rb2 30.Ng3 Qg6 31.Qb2 Nb2-+) 30.Nd4 (30.Qe4 de4 31.Bf4-+) 30…Qc2 (30...Qc2 31.Nc2 Nd3-+) 0-1. tunniato (1645) - Carpov2020 (1630), lichess.org, 2021.

3.d3 a5 4.c3 (4.b5!? Ba3 5.Na3-/+) 4...ab4-+ 5.Bb4 (5.cb4?? Ra3! 6.b5 Bb4 7.Nd2 Bd7-+) 5...c5 6.Ba3 Nc6 7.e3 Nf6 8.f3 (8.Nf3-+) 8...Be7 9.g3 0-0 10.Ne2 Qa5 11.Bh3 e5 12.Bg2 (12.Bc8 Rfc8 13.0-0 Qa6-+) 12...Be6 13.g4 (13.0-0 Qb6-+) 13...h6 (13...Qb6 14.0-0-+) 14.Bb2 (14.0-0 Qb6-+) 14...Rfd8 Black prepares d4 (better 14...d4!? 15.ed4 Nd5 16.0-0-+) 15.0-0 d4 (better 15...Qb6 16.Qb3 Qa6-+) 16.e4 (16.ed4 Qb6 17.Qd2-+) 16...dc3 17.Nbc3 Nb4 (17...c4 18.Kh1-+) 18.a3 (18.Nc1 c4 19.a3 Nd3 20.Nd3 Rd3-+) 18...Nd3 19.Qc2 (19.Qb1 c4 20.Kh1 Ra6-+ (worse 20...Nb2 21.Qb2 Ba3 22.Qb5-+)) 19...c4 (better 19...Qb6 20.Bc1 Bb3 21.Qb1 c4 22.Kh1 Nf2 23.Rf2 Qf2 24.g5-+) 20.h4 (20.Kh1-+) 20...Qb6 21.Kh1 Nf2 (better 21...Qb2 22.Qb2 Nb2 23.Rfb1 Ra3 24.Ra3 Ba3 25.Nb5-+) 22.Kh2 N2g4! 23.Kg3 (23.fg4 Ng4 Double attack) 23...Ne3 (better 23...Nh5 24.Kh3 Ne3 25.Kh2 Nc2 26.Rab1-+) 24.Qb1 Nf1 25.Bf1 Rd2 26.Bc1 Nh5 (26...Qg1 27.Ng1 Nh5) 27.Kg2 Qb1 (27...Nf4 28.Kh1 Qf2 29.Bd2 Qh4 30.Kg1 Bc5 31.Nd4 Bd4 32.Be3 Be3) 28.Rb1-+ (28.Nb1?? Nf4 29.Kh2 Rd1 30.Nf4 ef4 31.Bf4 Rf1-+) 28...Rc2 29.Nb5 (29.Rb7 Bh4 30.Nd5 Rd8-+) 29...Bh4 30.Nd6 (30.Nc7 Rd8 31.Ne6 fe6-+) 30...Be7 (better 30...Rd8!? 31.Nb7 Rd1 32.Nc5-+) 31.Nb7 (31.Nb5 Rd8 32.Nbc3 Rd7-+) 31...Ba3 (31...c3 32.Kf2-+) 32.Be3 (32.Ra1 Nf4 33.Bf4 ef4-+) 32...f5 (better 32...Be7 33.Bf2-+) 33.Nc5 (33.Rb6 Kf7 34.Rb5-+) 33...Bc5 34.Bc5 Nf4 35.Kf2 Ne2 36.Be2 fe4 (better 36...Raa2 37.Re1 c3 38.ef5-+) 37.fe4 (37.Ke3-+) 37...Bg4 38.Re1 (38.Kg3 Be2 39.Bb4 Raa2-+) 38...Raa2 39.Rb1 Re2 40.Kg3 (40.Kg1 Bh3 41.Bb6 Rg2 42.Kh1 Rh2 43.Kg1 Rag2 44.Kf1 Rh1 45.Bg1 Rhg1) 40...Rg2 41.Kh4 h5 (41...g5) 42.Rb8 Kh7 43.Rb6 (43.Rb2 Rab2 44.Be3 Rh2 45.Kg5 Rbg2 46.Bf2 Bd7 47.Bg3 Rg3) 43...Rae2 (43...Bd7 44.Rh6 gh6 45.Be3 Rh2 46.Kg3 Rh3) 44.Bf8 (44.Bf2 Ref2 45.Rh6 Kg8 46.Rd6 Rf4 47.Rd8 Kh7 48.Rd6 g5 49.Kg5 Bd1) 44...Re4 45.Kg5 (45.Rh6 Kh6 46.Bg7 Kg6 47.Be5 Bd7 48.Bf4 Rf4) 45...Bf3 (45...Be6! 46.Kh5 g6) 46.Kf5-+ h4 47.Ke6 h3 48.Rb7 Reg4 49.Rf7 h2 50.Rf3 h1Q 51.Ke5 Re2 52.Kf5 (52.Re3 Re3 53.Kd6 Rg6 54.Kc5 Qc6 55.Kb4 Rb3 56.Ka5 Qb5) 52…Qf3 0-1. Paul593 - NIGEW1 (1905), ChessWorld.net, 2018.

3.d3 Nc6 4.c3 Bd6-/+.

3.d4 Nc6 4.e3 Bb4=+ 5.c3 Ba3–/+ 6.Na3 Nf6 7.Nf3 Ne4 8.Bb5 Nc3 9.Qd3 Nb5–+ 10.Nb5 a6 11.Nc3 0-0 12.h4 Nb4 13.Rb1?? a5 14.Qd1 b6 15.a3 Nc6 16.Rb5? Ba6 17.Rb1 Qe7 18.g3? Qa3 19.Qd2 Rae8 20.Ne5 Ne5 21.de5 Bc4 22.Nd1 Qa2 23.Rb2 Qa4 24.Nc3 Qc6 25.h5 d4! 26.ed4 Qh1 0–1. li0ns4life – DistantFalcon, internet, 2007.

3.e3 a5 4.Bb5 Bd7 5.Bd7=+ Nd7 6.ba5 Ba3 7.Na3 Ngf6 8.Nf3 0-0 9.0-0 Ne4 10.d4 c5 11.Ne5 Ne5–/+ 12.de5 Qa5 13.Nb1 b5 14.f3 Nc3 15.Nc3 Qc3 16.Qd3 Qd3 17.cd3–/+ c4 18.dc4 bc4 19.Rac1? Ra2–+ 20.e4 g6 21.ed5 ed5 22.Rfd1 Ra5 23.Rc3 f6 24.ef6 Rf6 25.h4 h5 26.g4 hg4 27.fg4 Rf4 28.Rg3 d4 29.Rb1 c3 30.Rb8 Kg7 31.Rb7 Kh6 32.g5 (32.g5 Rg5 33.hg5 Kh5 34.Rh7#) 1–0. Lastro – Mr.Oldenslo, ChessWorld.net, 2011.

3.e3 Nc6 4.Bb5 Bd7 5.c3 Qg5 6.g3 e5 7.d4 Bd6 8.Nf3 Qf6 9.Nbd2 e4 10.Bc6 Bc6 11.Nh4 Nh6 12.Ng2 Nf5 13.0-0 h5 14.Bb2 h4 15.g4 h3 16.Re1 hg2 17.gf5 Rh2 18.f4 Qh4 19.Qe2 Rh1 0–1. Benassi – Civello, corr 1982.

3.e3 Nf6 4.f3 Be7 5.g4 b6 6.c3 Bb7 7.d4 Nbd7 8.Qc2 e5 9.de5 Ne5–/+ 10.Bh3 0-0 11.Nd2 Ba6–+ 12.0-0-0? Nd3 13.Kb1 Nf2 14.g5 Bd3 (14...Bd3 15.Qd3 Nd3 (15...Nd1?! 16.gf6 Bf6 17.Bg2–+) 16.gf6 Bf6–+; 14...Nh1?! 15.gf6 Nf2 16.fe7 Qe7 17.Bf5 Nd1 18.Qd1 Qe3 19.b5–+) 0–1. eightyone (2155) – davidloza (2310), net–chess.com, 2007.

4.Na3 c5 5.d4?? (better is 5.e3=+) 5...Qa5–+ 6.Qd2 Qa3 (7.dc5 Bd7–+) 0–1. excalibur – 300SPARTANS, caissa.com, 2004.

4.Na3 Qd6 5.Qc1 Bd7 6.d4 a6 7.c4? Qb4–+ 8.Kd1 ab5 9.Nc2 Qc4 10.e3?? Qf1 11.Ne1 Qf2 12.Qc7 Nc6 13.Qb7 Ra2 14.Ngf3 Ra1 0–1. iczker – piobur23, kurnik, 2011.

4.Na3 e5=+.

4.Na3 Qe7 5.Qc1 c5 6.c4 Nf6 (7.Nf3 0-0–/+) 0–1. pinecrest1981 – OutOne, caissa.com, 2004.

4.Na3 Qe7 5.Qc1 c6 6.c4 dc4 7.Nc4 cb5 (7...Nf6 8.Nf3=) 8.Na3 (better is 8.Nb6! ab6 9.Qc8 Qd8 10.Qb7=) 8...Nc6=+ 9.Nb5 a6 10.Nc3 Bd7 11.e3 Nf6 12.Na4 (12.Qb2 b5=+) 12...b5 13.Nb6 Rb8 14.Nd7 Qd7 15.Nf3 0-0 16.a4 (16.d4!?=+) 16...Rfc8 17.ab5? (17.Qa3 e5–/+) 17...Nd4 (17...ab5?! 18.Qb2=+) 18.Qd1?? (18.ed4 Rc1) 18...Nc2–+ 19.Ke2 (19.Qc2 Rc2 20.ba6 Rcb2–+) 19...Qb5 20.d3 Na1 21.Qa1 Qb2 22.Qb2 Rb2 23.Nd2 Rcc2 (24.Kf3 Rd2–+) 0–1. pinecrest1981 – denys, caissa.com, 2004.

3.Nc3 Be7 4.e4 a5 5.Rb1 0-0 6.Bc4? d5 7.ed5 ed5 8.Bd3 Be6 9.Nb5 c6 10.Nd4 ab4 11.Ne6–/+ fe6 12.Bb4 c5 13.Bc3 d4 14.Bb2 Qd5 15.Nf3 Kh8 16.0-0? e5 17.Ng5 h6–/+ 18.Re1 c4 19.Be4–/+ Ne4 20.Ne4 Ra2 21.Ng3 Na6 22.Ne4 Nc5 23.d3 cd3 24.cd3–/+ Ne4 25.Re4 Bg5 26.Qg4? Qb3–+ 27.Re5? Rb2 28.Rb2 Qb2 29.Qe2 Qe2 30.Re2 Rc8 31.g3 Rc1 32.Kg2 Rb1 33.Kf3 b5 34.h4 Bf6 35.Ke4 b4 36.Kd5 b3 37.Kc4 Kg8 38.h5 Kf7 39.Kb4 Rd1 40.f4 Rd3 41.g4 Re3 42.Rb2 d3 43.Rb3 d2 44.Rb1 Re1 (44...Re1 45.Rb2 Bb2–+) 0–1. stardom (2250) – michelleke (2355), net–chess.com, 2003.

3.d4 a5 4.e3 (4.b5!? Ba3 5.Na3=+) 4...ab4-/+ 5.Bb2 d5 6.c3 bc3 7.Bc3 c5 8.Bd3 (8.dc5 Bc5 9.Nf3 Nc6-/+) 8...cd4 (8...c4 9.Bc2-+) 9.Bd4 Nc6 10.Nf3 Nd4 11.Nd4 e5 12.Ne2 (12.Nc2 Bd6-+) 12...e4 (12...Bb4 13.Nd2-+) 13.Bc2 (13.Bb5 Bd7 14.Bd7 Qd7-/+ (worse 14...Nd7 15.Nbc3=+; 14...Kd7?! 15.Nbc3=+)) 13...Bd6 14.0-0? (14.Ba4 Bd7 15.Bd7 Qd7-+ (15...Nd7?! 16.Qd5 Nc5 17.Nbc3=+; 15...Kd7?! 16.Nbc3-/+)) 14...h5?? (14...Bh2 15.Kh1 Ng4 16.g3-+) 15.f3? (15.Ba4 Kf8 16.Nec3 Bh2 17.Kh1-+) 15...Bh2?? (better 15...ef3 16.Rf3 Bg4 17.Ba4 Kf8-+) 16.Kh2+= Ng4?? (better 16...ef3 17.Rf3 Qe7=) 17.fg4+- hg4 18.Kg3?? (better 18.Kg1 g3 19.Rf4+-) 18...Qh4 19.Kf4 g5 (19...f6 20.Ba4 Ke7 21.Bd7 g3 22.Kf5 Qg5) 20.Ke5+- Be6 (20...0-0 21.Rh1 Qf2=) 21.Nd4 (better 21.Nbc3 Ra5 22.Qd4+-) 21...Qh7 (21...Qg3 22.Rf4 gf4 23.Ne6 Rh5 24.Kd6 fe3 25.Kc5 Rc8 26.Kb5 d4 27.Ka4 Ra8 28.Kb3 e2 29.Qd3 ed3 30.Ng7 Kd8 31.Nd2 Qc7 32.Ne6 fe6 33.a4 Qc2 34.Kb4 Qc3) 22.Ne6+- fe6 23.Ke6 (23.Nd2 Qc7 24.Ke6 Qe7 25.Kf5 Rf8 26.Kg4 Qe6 27.Kg3 Qe5 28.Kg4 Qe6 29.Kg3 Qe5 30.Kg4 Qe6=) 23...0-0-0 (better 23...Ra6!? 24.Ke5 Qg7 25.Kd5 Ra5 26.Ke4 Qe5 27.Kd3 Rd5 28.Kc4 Rd1 29.Rd1 Qa1-+) 24.Ba4= Attacking the backward pawn on d5 24...Rhe8?? (better 24...Qh6 25.Ke5 Qd6 26.Kd4 Qb4 27.Ke5 Qe7 28.Kd4 Qg7 29.Kc5 Qa1 30.Qg4 Kb8 31.Qg3 Ka8=+) 25.Kf6?? (better 25.Be8 Re8 26.Kd5 Rd8 27.Kc4 Qc7 28.Kb3 Qb6 29.Kc2 Rd1 30.Rd1 (30.Kd1? Qb2-+) 30...Qe3 31.Nc3+-) 25...Rf8 (25...Rd6 26.Kg5 Rg6 27.Kf4 Qc7 28.Kf5 Qf7) 26.Kg5 (26.Ke6 Qc7 27.Qd5 Rf1 28.Qd8 Kd8 29.Nc3 Qb6 30.Kd5 Ra1 31.Ke4-+) 26...Rd6 (26...Qe7 27.Rf6 Qf6 28.Kg4 Qg6 29.Kh3 Rh8 30.Qh5 Rh5) 27.Kg4 (better 27.Rf8 Kc7 28.Qc2 Kb6 29.Qb2 Ka7 30.Qd4 b6 31.Qh8 Qh8 32.Rh8+-) 27…Rg6 0-1. PetLot (2000) - jiacomo (1715), lichess.org, 2016.

3.e3 a6 4.Nf3= Be7 5.Be2 0-0 6.0-0 d5 7.d4 b5 8.Ne5 c6 9.Bd3= Bb7 10.Qf3 Nbd7 11.Nd2 Ne5 12.de5 Nd7 13.Qh3 h6 14.Nf3 c5 15.Qg4 c4 16.Be2 f6 17.Qe6+/– Kh8 18.Rad1 Ne5 19.Ne5+/– fe5 20.Qe5 Bf6 21.Qe6 Re8 22.Qf7 Re7 23.Qg6 Bc6 24.Bf3+/– Be8 25.Qg4 Qd6 26.Bd5 Rd8 27.Bc4! Qc7 28.Rd8 Qd8 29.Bb3 Qd6 30.Rd1 Qe5 31.Qc8 Kh7 32.h3 Bh5 33.Bg8 Kg6 34.g4 (34...Bg4 35.Qg4 Qg5 36.c4+–) 1–0. Wall,Bill – Cinar, Internet, 1996.

3.e3 Nc6 4.b5 Ne7 5.Nf3=.

3.g3 d5 4.Bg2 Nbd7 5.f4 a5 6.ba5 Ba3–/+ 7.Na3 Ra5 8.Qc1 Qe7 9.Nb1 e5 10.fe5 Ne5 11.Nf3 Bh3 12.0-0 Bg2 13.Kg2 Ng6 14.e3 h5 15.h4 Ne5 16.a4 Ne4 17.Nc3?? Nc3–+ 18.dc3 Ng4 (18...Ng4 19.Re1 Qe4–+; 18...Nc4 19.Re1–+) 0–1. Roever – Micheel, corr SOK–89–34, 1989.

3.Nh3 d5-/+.

3.Nh3 Be7 4.Nc3 (4.b5!?=+) 4...0-0 (4...a5 5.Nb5-+) 5.Qc1 d5 6.d4 (6.e3 d4 7.ed4 Nc6-/+) 6...Nc6-+ 7.e3 Bb4 (7...Nb4 8.Be2-+) 8.Bb4-/+ Nb4 9.Qd2 Qe7 (9...Qd6 10.a3 Nc6 11.f4-/+) 10.a3 Nc6 11.Nf4 Bd7 (11...Rd8!? 12.Bb5 e5 13.de5 Ne5-+) 12.Be2 a6 13.0-0 b5 (13...b6 14.Bf3=+) 14.Nd1 (14.h3 Ne4 15.Ne4 de4=+) 14...Na7 (14...e5 15.de5 Ne5 16.Nd5 Nd5 17.Qd5-/+) 15.Nc3 c5 16.Na2 (16.Bf3 Nc6-/+) 16...cd4 (16...Ne4!? 17.Qc1-+) 17.ed4-/+ Rfc8 (17...Qa3 18.Nb4 Ne4 19.Ra3 Nd2 20.Rfa1-/+) 18.Nb4 (18.f3 h6-/+ (worse 18...Qa3 19.Nb4 Qc3 20.Qc3 Rc3 21.Ra6+=)) 18...Nc6 (18...a5!? 19.Nbd3 Ne4-/+) 19.Nc6 Bc6 20.Bf3 (20.f3 Qa7 21.Kh1 Qc7-/+) 20...Bb7 (20...Ne4 21.Qd1-+) 21.Rfe1 (21.a4 Ne4 22.Be4 de4-/+) 21...Ne4-+ 22.Qb4 (22.Be4 de4 23.Re3-+) 22...Qb4 23.ab4 Rc2 24.Be4 (24.Be2-+) 24...de4 25.Re3 (25.Rab1 Rd8 26.Ne2 Rdc8-+) 25...Rac8 26.Ne2 (26.f3 R8c4 27.fe4 Rd4-+) 26...Rb2 27.Ng3 (27.f3 ef3 28.gf3 Rb4-+) 27...Rb4 28.Ne4 Rd4 29.f3 Be4 (better 29...Rc2 30.h4-+) 30.Re4 (30.fe4 Rc6 31.e5-+) 30...Re4 31.fe4 Rc6 32.Kf2 Kf8 33.h3 b4 34.Ke1 Rc4 (34...Ke7 35.Ra4 Rb6 36.Kd2-+) 35.Kd2 Re4 36.Ra6 Ke7 37.Kd3 (37.Ra7 Kf6-+) 37...f5 38.Ra4 (38.Ra8 h5-+) 38…Kf6 0-1. Shocker36 (1790) - Klaatu (1990), ChessWorld.net, 2013.

4.Na3 0-0 5.d4 d5 6.c4 Qe7 7.Qb3 dc4 8.Nc4 Nd5 9.e4 Nf4 10.g3 Ng6 11.Bh3 Nd7 12.Nf3 Nf6 13.e5 Nd5 14.Ne3 c6 15.a4 Ne3 16.fe3 cb5 17.ab5 Bd7 18.0-0 Rfd8 19.Rfc1 Rac8? 20.Bf1 Rc1+/– 21.Rc1 Be8 22.b6 ab6 23.Qb6 Rb8 24.Rc7 Qa3 25.Kf2 Qa2 26.Be2 Nf8 27.Rb7 Rb7 28.Qb7 Qa4 29.Nd2 Bc6 30.Qb3 Qa1 31.Bc4 Qc1 32.Ke2 Qg1 33.e4 Qh2 34.Kd1 Qg3?? 35.d5 Qb3 36.Bb3 ed5 37.Bd5? Be8 38.Nc4 Nd7 39.Nd6 Kf8 40.e6 fe6 41.Be6 Nf6 42.e5 Nh5 43.Bf5 g6 44.Bg4 Ke7 45.Ne4 Bd7 46.Bh5 gh5 47.Ng5? h6 48.Nf3 Bg4 49.Ke2 Bf3 50.Kf3 Ke6 51.Kg3 Ke5 52.Kh2 Kf5 53.Kh1 Kg4 54.Kh2 h4 55.Kh1 h5 56.Kg1 ½–½. iczker – rubin, kurnik, 2011.

4.Na3 0-0 5.Nf3 Qe7 6.d4?? Qa3–+ 7.c4 Qc3 8.Nd2 Ne4 9.Rc1 Qd4 10.e3 Qe5 11.Nf3 Qf6 12.Bd3 Nc3 13.Qc2–/+ Na2! 14.Qa2 c6 15.Qc2 h6 16.0-0 d5 17.bc6 bc6 18.cd5 cd5?? 19.Qc8+– g6?? 20.Qb7 Nc6 21.Rc6 Rab8 22.Qd7 Rfd8 23.Qa7 g5 24.Rfc1 g4 25.Nd4 e5 26.Nf5 Qg5 27.Nh6 Kg7 28.Qf7 Kh8 29.Qh7 1–0. iczker – elsh1403, kurnik, 2011.

4.e3 a5 5.c3 ab4=+ 6.Bb4 c5 7.Ba3 Bd6 8.Bb5 Bd7 9.Bd7 Qd7 10.0-0 0-0 11.Qc2 b5 12.g4? Ng4–+ 13.d4 Nf6 14.dc5 Ra3 15.Na3= Bc5 16.Ng5?? h6 17.Nf3 Ba3 18.Ne5 Qc7 19.f4 Ne4 20.Rab1 b4 21.cb4 Qc2 22.b5 Bc5 23.Rfc1 Be3 24.Kf1 Qf2 0–1. madidog – ahmed sharkawy_1, ChessWorld.net, 2005.

4.e3 Ne4 5.Bd3 Qf6 6.c3 Bd7 7.Qc2 Qf5 8.0-0 Bd6 9.b5 Qg4 10.Bd6 Nd6 11.Na3 a6 12.Ne5 Qh5 13.Nd7 Nd7 14.ba6 Ke7 15.Rab1 c5 16.Nb5 c4 17.Bc4 Nc4 18.ab7 Rab8 19.Nd4 Nde5 20.Rb4 Qg6 21.Qg6 hg6 22.f4 Nd3 23.Nc6 Kd6 24.Nb8 Nb4 25.Rb1 Rb8 26.Rb4 Nd2 27.a4 Kc6 28.Rd4 Nc4 29.e4 Rb7 30.ed5 ed5 31.Rd1 Rb3 32.Ra1 Rc3 33.a5 Ra3 34.Ra3 Na3 35.Kf2 Kb7 36.g4 Ka6 37.Ke3 Nb5 38.Kd3 Ka5 39.Ke3 Kb4 40.Kd3 d4 41.h3 f5 42.gf5 gf5 43.h4 g6 44.Kd2 Kc4 45.Kd1 Kc3 0–1. Delfi 1.40 – Mad005, computer chess game, 2001.

3.Ba3 Ba3 4.Na3 Nf6 5.e3 0-0 6.d4 b6 7.Qf3 Nc6 8.Ne2 Bb7 9.e4 Na5 10.Ng3 c5 11.dc5 bc5 12.Rb1 Qc7 13.Nb5 Qc6 14.Qc3 Ne4 15.Qa5+/– Ng3 16.hg3 Qe4 17.Kd1 Qg4 18.Be2 Qe4?? 19.Bf3+– (19…Qf5 20.Bb7+–; 19.Na7?! Qg2 20.Re1 d6=+) 1–0. NN – COMP, 2003.

3.Na3 d5 4.h4 Qe7 5.Rb1?? (better is 5.Nf3–+) 5...Ba3 6.Ba3 Qa3 7.Rh3 (7.e3 Nd7–+) 7...Qa4 8.h5 Nf6 9.Ra1 Qg4 10.Rd3 (10.h6 g6–+) 10...Qh5 11.Rf3 Ng4 12.Rf4 e5 13.Rb4 b6 14.Raa4 e4 15.Rb5 Bd7 16.Ra3 Bb5 17.Rb3 Ba6 18.Rg3 f5 19.Re3 Ne3 20.de3 Nc6 21.Qd5 Bb7 22.Qe6 Ne7 23.Qc4 c5 24.Qa4 Bc6 25.Qa3 0-0 26.c4 f4 27.ef4 Rf4 28.Qa6 e3 29.fe3 Qh4 30.Kd2 Rf1 31.g4 Qe1 32.Kd3 Rd8 33.Kc2 Rd2 34.Kc3 Qc1 35.Kb3 Qb2 0–1. barbermachine – fayyaz, internet, 2007. (=1.a4 e6 2.b4?? Bb4)

3.c3 Ba5 4.e4 Nf6 5.e5 Nd5 6.Na3 Nc6 7.Nc4 d6 8.Na5 Na5 9.d4 de5 10.de5 Qe7 11.Qg4 0-0 12.Bg5=+.

3.c3 Be7 4.e4 e5 5.Qh5 Nc6 6.Bc4 g6 7.Qe2 d6 8.Nf3 Nf6 9.0-0 Bg4 10.h3 Bf3 11.Qf3 g5 12.d3=+.

3.e4 d5 4.e5 Nc6 5.c3 Ba5 6.Nf3 h6 7.d4 a6 8.Bd3 Bd7 9.Qc2 g6 (9...Nge7 10.Nbd2=) 10.Nbd2 Nge7 11.Nb3 b6 12.0-0 Qc8 13.Ba3 Na7? (better is 13...Nf5!?+=) 14.Na5+– ba5 15.Bc5 Nac6 16.Qe2 Nf5 17.Rfb1 g5 18.Rb2 Rb8 19.Rb8 Qb8 20.Rb1 Qd8 21.Ba6 g4 22.Nd2 h5 23.Bd3 Qg5 24.Nb3 h4 (24...Nfe7 25.Ba3+–) 25.Na5! Nce7 (25...Na5 26.Rb8) 26.Rb8 Bc8?? (26...Nc8+–) 27.Bb5 (27.Bb5 c6 28.Nc6+–) 1–0. marekt – Stallan, ChessWorld.net, 2003.

3.e4 Nf6 4.e5 Nd5 5.c3 Ba5 6.Na3 Nc6 7.Nc4 d6 8.Na5 Na5 9.d4 de5 10.de5 Qe7 11.Qg4 f6 12.Nf3=+.

4.Bb4 Nb4 5.c3 Nc6 6.d4 d5 7.Nf3 Nf6 8.e3 0-0 9.Bb5 Bd7 10.0-0 a6 11.Bd3 Re8 12.Ne5 Ne5 13.de5 Ne4 14.Be4 de4 15.Qg4 f5 (15...Bc6 16.c4–/+) 16.ef6+= Qf6 17.Nd2 Qc3 18.Ne4 Qc4?? (better is 18...Qe5+=) 19.Nf6+– Kh8 20.Qc4 (20.Qc4 gf6 21.Qd4+–) 1–0. b4_player (1980) – the_tafit (1715), GameColony.com, 2002.

4.c3 Ba3 5.Na3 Nf6 6.Nf3 0-0 7.Qc2 g6 (7...e5 8.d4 e4 9.Ne5–+) 8.g3 (8.e4 d6+=) 8...d5 9.Qd3 (9.Bg2 e5–/+) 9...a6 10.Qe3 Qd6 11.Ng5 (11.d4 Bd7–/+) 11...Ng4 12.Qf3 Nce5 13.Qg2 Qb6 14.Qh3?? (better is 14.Rb1 Qd6 15.Nc2–/+) 14...Qb2 (better is 14...Qf2 15.Kd1 h6–+) 15.Rb1 (15.Qh7) 15...Qa3 (15...Qb1 16.Nb1 Nf6+–) 16.Qh7 1–0. Hoentzsch,Daniel (1885) – Kappler,Thomas (2135), remoteschach.de, 2007.

3.a3 ab4 4.ab4 Ra1 5.Ba1 c6 6.Nf3 Na6 (6...Nf6 7.b5=) 7.b5 Nc5 8.e3 cb5 (8...d5 9.Nc3+=) 9.Bb5 Nf6 10.0-0 Nce4 11.d3 (11.Nc3 Nc3 12.Bc3 Be7+=) 11...Nd6 12.Ba4 b5 13.Bb3 Bb7 14.Nbd2 (14.e4 Ng4+=) 14...Nf5 (14...b4 15.Be5=) 15.e4 Nh6 16.Nd4 Nfg4 (16...b4 17.c4+=) 17.Nb5 (17.h3 Nf6 18.Nb5 Bb4+–) 17...Rg8 (better 17...Qb8!? 18.g3 Ba6+–) 18.h3+– Qh4? (better 18...Nf6+–) 19.hg4 Ng4 Threatening mate... how? 20.Nf3 Qh5 21.Nc7 (better 21.Ba4+–) 21...Kd8+– 22.Nb5 (better 22.Qd2 Bd6 23.Ne6 fe6 24.Qg5 Qg5 25.Ng5 Bh2 26.Kh1+–) 22...Bc6?? (better 22...Ke8=) 23.Nbd4+– Bd6 24.Nc6 dc6 25.d4 (better 25.g3+–) 25...Bh2= 26.Kh1 Bg3 27.Kg1 Bh2 28.Kh1 Bf4 29.Kg1 Nh2?? (better 29...Bh2 30.Kh1=) 30.g3 (better 30.Ne5 Qh4 31.Re1+– (31.Nf7?! Ke8 32.Re1 Kf7+–)) 30...Nf1 31.Qf1?? (better 31.Kf1 Bc7 32.Ba4+–) 31...Qf3= 32.gf4 Qf4 (32...Qg4 33.Kh1 Qh5 34.Kg2 Qg4 35.Kh1 Qh5 36.Kg1 Qg4 37.Qg2 Qd1 38.Qf1 Qg4=) 33.Qg2 (33.Qe1 Qg4 34.Kf1 Kd7+=) ½–½. aravind555 – Marko31, lichess.org, 2018.

3.ba5 Ra5 (--> 1.b4 a5 2.ba5 Ra5 3.Bb2 e6).

3.ba5 c6 4.c4 Qa5 5.e3 Bb4?? (better 5...d5=) 6.Bg7+- f6 (6...Nf6 7.Bh8 Qe5 8.Nc3 Bc3 9.Nf3+-) 7.Bh8 (better 7.Qc2+-) 7...d5 (7...Qe5 8.Nc3! Bc3+-) 8.Qh5 Ke7 (8...Kd8 9.Qh7 Ne7 10.Bf6+-) 9.Qh7 Kd6 10.Qg8 Bd7 11.Qf8 (better 11.Bf6 c5 12.Be5 Kc6 13.cd5 Kd5 14.Bb8+-) 11...Ke5 12.Bf6 Ke4 (12...Kf5 13.Bd3 Kg4 14.Qg7 Kh5 15.g4) 13.f3 Kf5 14.Bd4 (14.Bd3) 14...Kg6 (14...Bf8 15.Bd3 Kg5 16.Nh3 Kh6+-) 15.Qf6 Kh7 16.Qg7 1-0. ClayPigeons (2085) - vit1977 (1940), Rated Bullet game, lichess.org, 2019.

3.b5 d6 4.e3 Bd7 5.Nf3 c6 6.a4 cb5 7.Bb5 Nf6 8.0-0 Be7 9.d4 0-0 10.Nbd2 Qb6 11.c4 d5 12.c5 Qd8 13.Qb3 Nc6 14.Rfc1 Ng4 15.h3 Nh6 16.Qd3 f5 17.Ne5 Ne5 18.de5 Rc8 19.Nb3 g5 20.f4 gf4 21.ef4 Kh8 22.Bd4 Rg8 23.Rc2 Bh4 24.Qf3 Rg3 25.Qh5 Rb3 26.Qh6 Bb5 27.ab5 Rb5 28.Qe6 Rc6 29.Qf5 Rg6 30.g4 Rb3 31.e6 Bf6 32.Bf6 Rf6 33.Qe5 Kg8 34.g5 Rg6 35.Kh2 Rb4 36.Ra5 Qa5 37.e7 1–0. Orang4Utan (1690) – varicocha (1845), lichess.org, 2017.

3.b5 f6 (--> 2.Bb2 f6 3.b5 a5).

4.e3 a3 5.Bc3 d5 6.d4 Nd7 7.Qd2 (7.Nf3 Ngf6=) 7...Nb6 (7...Ngf6 8.Bd3=+) 8.Bb4= Bb4 9.Qb4 Bd7 10.Na3 Ne7 (10...Ra4 11.Qb2=) 11.Nb1 0-0 12.a4 c6 13.a5 (13.Ra3 Nc4 14.Bc4 dc4+=) 13...Nc4 (13...cb5!? 14.Bb5 Bb5 15.Qb5 Nc4=) 14.Bc4+= dc4 15.Qc4 (15.b6 Nd5 16.Qc4 Nb6+=) 15...cb5 (15...Ra5 16.Qc3 Rb5 17.Nf3=) 16.Qb4 (16.Qc3 Nc6+=) 16...Bc6 (16...Nc6 17.Qc3=) 17.Nf3+= Nd5 18.0-0?? (better 18.Qd2+=) 18...Nb4-+ 19.c3 Nd3 (better 19...Nc2!? 20.Ra2 Bf3 21.gf3 Qg5 22.Kh1-+) 20.Nbd2 e5 (20...Ra5 21.Rab1-+) 21.Rfb1 (21.de5 Ra5 22.Rad1 Ra2-+) 21...Bf3 (21...Ra5 22.de5 Bf3 23.Nf3 Ra1 24.Ra1-+) 22.Nf3 e4 (22...Ra5!? 23.Ne1 Ra1 24.Ra1 Ne1 25.Re1-+) 23.Ne1 (23.Nd2 Qd5-+) 23…Qc7 0-1. fishissushi (1935) - dExta (1920), Rated Bullet game, lichess.org, 2020.

4.e3 a3 5.Bd4 b6 6.Nf3 c6 7.Ne5+= Bc5? 8.Nc6!+– dc6? 9.Bg7 Nf6 10.Bh8 Kf8 11.Qf3 Be7 12.bc6 Kg8 13.c7! (13.c7 Qc7 14.Bf6 Bf6 15.Qf6 Qc2 16.Qd8 Kg7 17.Nc3+–) 1–0. Bonetti,Shane – guest672, ICC, 2002.

4.e3 f6 5.Bd3 a3 6.Bc3 e5? 7.Qh5+– g6 8.Bg6! Ke7 9.Na3! Bg7 10.Bd3 d6 11.Nc4 Qe8 12.Qf3 Qd8 13.Ne2 h5 14.Ng3 Bg4 15.Qb7 Nd7 16.Bb4 Rb8 17.Qd5 Be6 18.Nf5 Kf7 19.Ncd6! cd6 20.Nd6 Ke7 21.Qe6! Ke6 22.Bc4 Ke7 23.Nf5 Ke8 24.Ng7# 1–0. wyssy – ante, internet, 2011.

4.e3 Nf6 5.Nf3 Be7 6.h3 0-0 7.Bc4 d5 8.Be2 Nbd7 9.0-0 Nc5 (9...a3 10.Bf6 Nf6 11.d4=+) 10.d3 Bd7 11.Nbd2 (11.c4!?=) 11...Bb5-/+ 12.Nh2 (12.Rb1 Bc6-/+) 12...Bd6 13.Bf6 (13.Nhf3 b6-/+) 13...Qf6 (13...gf6?! 14.d4 Be2 15.Qe2=+) 14.Ng4 Qg6 (14...Qc3 15.d4 Be2 16.Qe2-+) 15.Nf3 f5 (15...Rfb8 16.d4 Be2 17.Qe2-/+) 16.Nge5-/+ Qf6 17.d4 Be2 18.Qe2 Ne4 (better 18...Ra7!?-/+) 19.Nd7+= Rf7 (19...Rf7 20.Nf6 Nf6+-). Dont_give_up (1870) - unjournakamura (2455), Hourly Crazyhouse Arena, lichess.org, 2019.

4.a4 Bb7 (--> 1.b4 a5 2.b5 b6 3.a4 Bb7 4.Bb2 e6).

4.a4 c5 5.e4 d5 6.ed5 Qd5 (6...ed5 7.Nf3=) 7.c4 (7.Be2 Bb7 8.Bf3 Qd7+=) 7...Qd8 (7...Qd6 8.Be2=) 8.Nf3 (8.Qf3 Ra7+=) 8...f6 (8...Nf6 9.Ra3=) 9.Be2+= h5 (9...e5!?+=) 10.0-0 (better is 10.Nh4+/–) 10...g5? (better is 10...Bd6+/–) 11.Ng5!+– fg5 (11...Ke7+–) 12.Bh8 Nf6 (12...g4 13.Qc2 Qg5 14.f4+–) 13.Bh5 Nh5 14.Qh5 Kd7 15.f4 Bb7 16.Qf7 Kc8 (16...Be7 17.Bf6 Qe8 18.Qh7+–) 17.Qe6 (better is 17.Bf6 Be7 18.Qe6 Kc7 19.Qe7 Qe7 20.Be7 gf4+–) 17...Nd7 18.Nc3 Kb8 (18...Be7 19.Bg7 g4 20.Be5+–) 19.Be5 (19.fg5!? Qg5 20.g4 Qe7+–) 19...Ka7 20.Nd5 Bd5 21.Qd5 (worse is 21.cd5 Rc8+–) 21...g4 (21...gf4 22.Rf4 Ne5 23.Qe5+–) 22.Ra3 g3 (22...Be7 23.Rd3 Nf6 24.Qc6+–) 23.hg3 (23.Rg3 Qe8 24.Rd3 Rd8+–) 23...Be7 (23...Ne5 24.fe5 Qd5 25.cd5+–) 24.Rd3 Bf6 (24...Nf6 25.Qc6 Qc8+–) 25.Bf6 (25.Qd7 Qd7 26.Rd7) 25...Nf6 26.Qf7 Nd7 (26...Qd7 27.Rd7 Nd7 28.Qd7 Kb8 29.Re1 Ra7 30.Re8) 27.Rd7 Qd7 28.Qd7 Kb8 29.f5 (29.Re1 Ra7 30.Re8) 29...Ra7 30.Qd6 (30.Qd8 Kb7 31.Re1 Ra8 32.Re7) 30...Ka8 (30...Rc7 31.Re1 Kc8 32.Re8 Kb7 33.Qd5 Rc6 34.Qc6 Ka7 35.Qd7) 31.f6 (31.Qd8 Kb7 32.Re1 Ra8 33.Re7) 31...Rf7 (31...Rc7 32.f7 Rc8 33.f8Q Rf8 34.Rf8 Kb7 35.Qe7) 32.Qd5 (32.Re1 Rc7 33.Re8 Kb7 34.Qd5 Rc6 35.Qc6 Ka7 36.Qd7) 32...Rb7 (32...Kb8 33.Re1 Rc7 34.Re8 Rc8 35.f7 Rd8 36.Qd8 Kb7 37.Qe7) 33.Qb7! Kb7 (33...Kb7 34.f7 Mate attack) 34.f7 Kc8 35.f8Q Kc7 (35...Kd7 36.Rf7 Ke6 37.Qe7) 36.Rf7 1–0. rcm06 (1930) – larry126, gameknot.com, 2012.

4.a4 c6 5.c4 Nh6 6.e3 d5 7.d4 Bb4 8.Bc3 Bc3 9.Nc3+= 0-0 10.Be2 dc4 11.Bc4=. Trkn – ANDRE BALLICO, itsyourturn.com, 2001.

4.a4 d5 5.e3 Bc5?? 6.Bg7+– Nf6 7.Bh8 Ke7 8.Bf6 Kf6 9.Qh5 Ke7 10.d4 Bd6 11.Nf3 Nd7 12.Ng5 Qf8 13.Qh7 Bb7 14.Qh4 Ke8 15.Be2 Be7 16.Bh5 Qg8 17.Bf7 Qf7 18.Nf7 Bh4 19.Nh6 Bg5 20.Ng4 Ke7 21.h4 Bf6 22.Nf6 Nf6 23.Nd2 Rg8 24.g3 Ng4 25.Ke2 Nf6 26.Rhf1 Rf8 27.Nf3 Ng4 28.Ne5 Nf6 29.Nc6 Bc6 30.bc6 Kd6 31.Rac1 Kc6 32.c4 dc4 33.Rc4 Kd6 34.Rfc1 Rc8 35.Rc6 Kd7 36.f3 Nd5 37.e4 Nb4 38.R6c4 Kd6 39.Ke3 Kd7 40.f4 Kd6 41.g4 Na2 42.R1c2 Nb4 43.g5 Nc2 44.Rc2 Rh8 45.Rh2 c6 46.h5 b5 47.h6 b4 48.g6 Ke7 49.g7 Rg8 50.h7 Rg7 51.h8Q Rg3 52.Kf2 Rg2 53.Rg2 b3 54.Rg1 Kd6 55.Rb1 c5+– 56.Rb3 c4 57.Qe5 Kd7 58.Rb7 Ke8 59.Qh8# 1–0. Onkel_Luis – elbusto, ICC, 2003.

4.a4 d5 5.e3 Nf6 6.c4 Bb7 7.Nf3 Nbd7 8.Be2 dc4 9.0-0 Be7 10.Bc4 0-0 11.d4 Ne4 12.Nbd2 Ndf6 (12...Nd2 13.Nd2 Rc8 14.Rc1=) 13.Be2 (13.Ne4 Be4 14.Ne5 Bd6+=) 13...Nd2 14.Nd2 Bd6 (14...Rc8 15.Rc1=) 15.Bf3 Bf3 16.Qf3 Qd7 (16...Nd5 17.Ba3+=) 17.Rac1 Rac8 18.Rc6 Nd5 19.Rfc1 (19.Nc4 Qd8+=) 19...Nb4 20.R6c4 Nd3 21.R1c2?? (21.Rb1 e5+=) 21...Nb2?? (better 21...Ne1 22.Qc6 Qc6 23.Rc6 Nc2 24.Rc2 Rfd8–/+) 22.Rb2+= f5 23.Rbc2 e5 24.Qd5 Qf7 25.Qf7 Rf7 26.Nf3 e4 27.Nd2 Kf8 (27...Re8 28.Rc6+–) 28.g3 (28.Rc6 Rb8+–) 28...Ke8 (28...Bb4!?+=) 29.Rc6+– Kd7 30.Nc4 Rf6?? (better 30...Rb8+–) 31.Nb6!+– cb6 A pinning theme 32.Rc8 Eliminates the defender c8 32...h5 (32...h6 33.R2c6+–) 33.R8c6 (33.R2c6 h4+–) 33...h4 (33...Be7 34.Rc7 Ke8 35.R2c6+–) 34.Rb6 hg3 35.hg3 Rh6 (35...g5 36.Ra6+–) 36.Rcc6 g5 (36...Bb4 37.Rb7 Kd8 38.Rg7 Rc6 39.bc6+–) 37.Rd6 Rd6 38.Rd6 Kd6 39.Kf1 (better 39.g4 f4 40.ef4 gf4+–) 39...g4 40.Ke2 Kd5 41.Kd2 Kd6 42.Kc3 Kd5 43.Kb3 Ke6 44.Kc4 Kd6 45.d5 Ke5 46.Kc5 f4 47.gf4 (47.gf4 Kf6 48.d6+–) 1–0. BeepBeepImAJeep (2610) – JAMAISJEPAYE (2250), lichess.org, 2017.

4.c4 c6 5.Nf3 Nf6 6.a4 (6.e3 Be7=) 6...Be7 7.e3 0-0 8.d4 c5 (8...Bb7 9.Bd3=) 9.Be2 d5 10.0-0 cd4 (10...Nbd7 11.Ne5+=) 11.ed4 (11.Qd4!? Bb7 12.cd5+=) 11...dc4= 12.Bc4 Nd5 13.Nbd2 Bb7 14.Qb3 h6 (14...Nd7 15.Rac1=) 15.Rfe1 Nd7 16.Rad1 N7f6 17.Ne5 Rc8 18.Ndf3 (18.Ba3 Ba3 19.Qa3 Nf4=) 18...Bd6 (18...Rc7 19.Ba3=) 19.h3 (19.Ba3 Qe7 20.Bd6 Qd6=) 19...Qc7 (19...Rc7 20.Ba3=+) 20.Kf1 (20.Rc1 Qe7=+) 20...Rfd8 21.Bd3 Nf4 22.Rc1 Qe7 23.Bc4 (23.Nc6 Bc6 24.bc6 Nd3 25.Qd3 Nd5=+) 23...Be5 (23...N6d5 24.Bd5 Bd5 25.Qe3 Be5 26.de5-/+) 24.de5 Ne4 25.Nd4?? (better 25.Red1!?=+) 25...Nc5 (better 25...Nd2 26.Kg1 Nb3 27.Bb3 Rc1 28.Rc1 Rd4 29.Bd4 Qg5-+) 26.Qg3 Bg2 27.Kg1 Qg5 (27...Na4 28.Qf4 Nb2 29.Kg2 Nc4 30.Nc6 Rc6 31.bc6-/+) 28.Rcd1? (28.Qg5 hg5 29.Ra1 Ne4-+ (29...Bh3?! 30.Nc6-/+)) 28...Bh3 (better 28...Na4 29.Bc1 Qg3 30.fg3 Rc4 31.Bf4 Bh3 32.Nc6 Rd1 33.Rd1-+) 29.Kh2?? (better 29.Qg5 hg5 30.Nc6 Na4 31.Rd8 Rd8 32.Bd4-+) 29...Bg4 (better 29...Na4 30.Nc6 Nb2 31.Rd8 Rd8 32.Nd8 Nc4-+ (32...Qd8?! 33.Qf4 g5 34.Rg1-+)) 30.Rg1 (30.Ra1-+) 30...Bd1 (30...Qh5 31.Qh4 Qh4) 31.Qg5-+ hg5 32.Rg5 (32.Nc6 Rc6! 33.bc6 Ba4-+) 32...Ba4 (better 32...Na4 33.Nc6 Nb2 34.Nd8 Rd8 35.Bf1-+) 33.Ne6 (33.Nc6 Rc6 34.bc6 Bc6 35.Bc1-+) 33…Nfe6 (33...Nfe6 34.Rg4 Bd1-+) 0-1. ClayPigeons (2145) - terelj (2145), Rated Bullet game, lichess.org, lichess.org, 2019.

4.e3 c6 5.a4 c5 6.Nf3 Bb7 7.Be2 Bd6?? 8.d4 (better 8.Bg7 Nh6 9.Bh8+– (9.Bh6?! Qf6+–)) 8...cd4 (8...Nf6 9.0-0+=) 9.Bd4 Nf6 10.0-0 (10.Nbd2 Bc7+=) 10...0-0 (10...Qc7 11.Nbd2 Bc5 12.c3+=) 11.Nbd2 Qe7? (11...Bc5 12.Bc5 bc5 13.Rb1+=) 12.c4 (12.Nc4!? Bc5 13.Nb6 Bb6 14.Bb6+–) 12...e5 (12...Bc7 13.Qc2+=) 13.Bb2 (13.Bb6!? Rc8 14.Ne1+=) 13...e4= 14.Nd4 (14.Ne1 Be5 15.Be5 Qe5=) 14...Be5 (14...Qe5 15.g3=) 15.Nf5 (15.f4 ef3 16.N2f3 Qe8+–) 15...Qe6 16.g4?? (16.Be5 Qe5 17.Nd4 Rc8=) 16...g6 (better 16...Bb2 17.Rb1 Be5–+) 17.Nd4+= Qd6 (17...Qe7 18.f4 ef3 A) 19.Rf3? Ng4 (19...Bf3?! 20.Bf3 Ra7 21.Qb3–/+) 20.Nf1 Qh4–+ (20...Bf3?! 21.Bf3 Qg5 22.Bg4–+); B) 19.Bf3 Ng4 20.Bb7 Ne3 21.Qe2 Nf1 22.Kf1 (22.Qf1?! Qg5 23.Qg2 Qe3 24.Qf2 Bh2 25.Kg2 Qf2 26.Kf2 Ra7=) 22...Qf6 23.Qf3+=) 18.f4 (18.Ba3 Qc7 19.Bf8 Kf8+–) 18...Bd4? (better 18...ef3 19.Bf3 A) 19...Bh2? 20.Kh1 Ng4 21.Bb7 Ne3 22.Qf3 (22.Ba8?! Nd1 23.Rad1 Bf4=) 22...Nf1 23.Nf1+– (23.Rf1?! Be5 24.Qe3 Nc6 25.bc6 Rae8+–; 23.Qf1?! Be5+–); B) 19...Ng4 20.Bb7 Bd4 21.Qg4 B1) 21...Be3? 22.Kh1 Qd2 23.Ba3+– (23.Ba8?! Qb2 24.Bd5 Kg7+–); B2) 21...Bb2+=) 19.Bd4+– Qe7 (better 19...h6+–) 20.g5 Nh5 (20...Ne8 21.Bb6 d5 22.Nb3+–) 21.Bh5 gh5 22.Qh5 Qe6 (22...Qd6 23.Rf2+–) 23.Bf6 (23.f5 Qd6 24.Rf4+–) 23...d6 (23...Qf5 24.Qh6 Qg6 25.Qg6 hg6+–) 24.Qh6 Qg4 25.Kh1 Qe2 (25...Qf3 26.Nf3 ef3 27.Qg7) 26.Qg7 1–0. GuestNVBF – GuestQGKZ, freechess.org, 2020.

4.e3 Nf6 5.c4 Be7 6.Nf3 0-0 7.a4 Bb7 8.Be2 c6 9.0-0 cb5 10.cb5 d5 11.d4 Nbd7 12.Nbd2 Rc8 13.Rc1 Bd6 14.Ne5 Qe7 15.Ndf3 (better 15.Nc6 Qe8 16.Qb3=) 15...Ne5?? (better 15...Rc1 16.Qc1 Rc8=) 16.de5+– (16.Ne5?! Rc1 17.Bc1 Ne4=) 16...Ba3 (16...Ne4 17.ed6 Qd6 18.Be5+–) 17.ef6 Qd6 (17...gf6 18.Rc8 Bc8 19.Ba3 Qa3 20.Qd4+–) 18.fg7 Rfe8 (18...Rfd8 19.Ba3 Qa3 20.Rc8 Rc8 21.Qd4+–) 19.Rc8 Rc8 20.Be5 (20.Bf6 h6 21.Bd3 e5 22.Be5 Qe6+–) 20...Qe7 21.Qd4 Bc5 (21...Ra8 22.Bf6 Qc5 23.Qd3+–) 22.Qf4 Bb4 (22...d4 23.Ng5 de3 24.Bd3+–) 23.Bd3 (better 23.Qh6 Re8 24.Bd3+–) 23...f5 24.Qh6 (better 24.g4 Bc3 25.gf5 Be5 26.Qe5 Qg7 27.Qg7 Kg7 28.fe6+–) 24...Bd6 (24...Qf7+–) 25.Ng5 Be5 26.Qh7 1–0. BeepBeepImAJeep (2635) – Kostya_Pereslegin (1850), lichess.org, 2015.

4.c4 d5 5.a4 b6 6.e3 Nf6 7.d4 Nbd7 8.Nf3 cd4 9.Nd4 Bb4 10.Bc3 Bc5 11.Nc6 Qc7 12.Nd2 0-0 13.Rc1 Bb7 14.cd5 Nd5 15.Bd4 Bc6 16.Bc5? Nc5–+ 17.bc6 Qc6 18.Bb5–/+ Qb7 19.0-0 Rac8 20.Nf3 Rfd8 21.Qe2 Qe7 22.Nd4 Qh4 23.g3 Qf6 24.Rfd1 h6 25.Kg2 Ne4 26.Nc6 Rf8 27.Rd4 Nec3 28.Qc2 Nb5 29.ab5 Nb4 30.Qc4 Nd5 31.e4+= Nc7? 32.Rd7 Rfe8 33.Rc2 Qg5 34.f3?? Kh7= 35.Rf7 Nb5 36.Qd3 Qh5 37.Rb7 Nc7? 38.Rb6 Qe5?? 39.f4 Qa1+/– 0–1. amator111 (1685) – fontolos (1820), kurnik, 2011.

4.e3 b6 5.c4 d5 6.f4 f5 7.Nf3 Nf6 8.Be2 Nbd7 9.0-0 Bb7 10.d4 h6 11.Nbd2 g6 12.Ne5 Bg7 13.Ng6+/– Qc7? 14.Ne5?? 0-0-0? 15.Ndf3 Ne4 16.Qc2 Rdg8? 17.Bd3 h5? 18.cd5 Bd5 19.dc5?? Ndc5 20.Rac1 Kb7 21.Bd4 h4 22.Be4 fe4 23.Nd2 h3 24.g3 Qe7? 25.Bc5 bc5? 26.Qc5 Qc5 27.Rc5 Kb6? 28.Nd7 Kb7 29.Rfc1 Rc8 30.Rc8 Rc8 31.Rc8 Kc8 32.Ne5 Ba2 33.Kf2 Bd5 34.Ke2 Kb7 35.Ndc4 a4 36.Kd2 Be5 37.Ne5 Kb6 38.Kc3 Kb5 39.g4 a3 40.g5 Ka4 41.g6 a2 42.Kb2 Kb4 43.g7 a1Q 44.Ka1 Kc3 45.g8Q Kd2 46.Qg3 Kc3 47.Qh3 1–0. carocan (1770) – nikb, kurnik, 2011.

4.a4 cb5 5.ab5 Qb6 6.Na3 Ba3? (6...d5 7.e3=) 7.Ba3?? (better 7.Bg7 Bb2 8.Bb2+-) 7...Qb5= 8.e4 (8.e3 Qf5=) 8...Qc6 (better 8...Qe5 9.Bd3 Nc6=) 9.d3 (9.Qg4!? g6 10.Qf4=) 9...b5 (better 9...Qc3 10.Ke2 d5 11.ed5 ed5-/+) 10.Nf3?? (10.Bb2 f6=+) 10...b4?? (better 10...Qc3 11.Nd2 b4 12.Bb4 Qb4-+) 11.Bb2=+ Nf6 (11...f6 12.Nd4 Qc5 13.Nb3=+) 12.Ne5 (12.Qd2 0-0=+) 12...Qc7 (12...Qc5=+) 13.Be2 (13.Nc4!? d5 14.Be5=+) 13...d6 (better 13...d5-/+) 14.0-0?? (better 14.Nc4 Nbd7 15.Ra4-/+) 14...de5-+ 15.Rc1 (15.c3 bc3 16.Qc2 Nc6 17.Qc3 0-0-+) 15...0-0 16.Qd2 (16.c3 Qd6-+) 16...Nc6 (16...Rd8 17.Qg5 Nbd7 18.c3-+) 17.f4 Nd4 18.Bd4 (18.Bd1 Rd8 19.Qf2 Ba6-+) 18...ed4 19.e5 (19.Ra1 Bb7-+) 19...Nd5 20.Bf3 Bb7 21.Bd5 Bd5 22.Rf3 (22.f5-+) 22...Bf3 23.gf3 Qe7 (23...Rfc8!? 24.Kh1-+) 24.Kf2 (24.Rb1 Qc5-+) 24...Qh4 25.Ke2 (25.Kg2 f6-+) 25...Qh2 26.Kd1 Qd2 (26...Qh1 27.Ke2 Qg2 28.Ke1 Qf3 29.Qf2 Qf2 30.Kf2-+) 27.Kd2 a4 28.Rg1 (28.Rb1 a3-+) 28...a3 29.Ra1 (29.Kc1 f6 30.Kb1 fe5 31.fe5 h5-+) 29...a2 (29...f6 30.Ke2-+) 30.Kc1 Rfb8 (30...h5!? 31.f5-+) 31.Kb2 f6 (31...h5!? 32.f5-+) 32.ef6 gf6 33.Ra2 (33.f5 e5 34.Rg1 Kf7 35.Ra1-+) 33...Ra2 34.Ka2 Kf7 35.Kb3 h5 36.Kc4 h4 37.Kd4 h3 38.Ke4 h2 39.f5 h1Q (39...ef5 40.Kd4 h1Q 41.Kc4 Qe1 42.Kd4 Qe5 43.Kc4 Qc3 44.Kd5 Rd8) 40.fe6-+ Ke6 41.d4 Qe1 42.Kd3 Qg1 (42...Qc3 43.Ke2 Qc2 44.Ke3 Kf5 45.f4 Kg4 46.d5 Re8 47.Kd4 Qc3) 43.d5 (43.c4 Kf5 44.d5 Qd1 45.Ke3 Re8 46.Kf2 Qe1 47.Kg2 Rg8 48.Kh3 Qg3) 43...Kd5 44.f4 (44.c4 bc3! 45.Kc3 Qd1 46.f4 Rb3) 44...Qd4 (44...Re8 45.c4 Kc5 46.Kc2 Re2 47.Kb3 Qd1) 45.Ke2 Qf4 (45...Re8 46.Kf3 Qe4 47.Kg3 Rg8 48.Kf2 Rg2 49.Kf1 Qe2) 46.c4 Kc4 (46...bc3 47.Ke1 Re8 48.Kd1 Qd2) 47.Ke1 (47.Kd1 Qf1 48.Kc2 Re8 49.Kd2 Re2) 47...b3 (47...Re8 48.Kd1 Qf1 49.Kd2 Re2) 48.Ke2 b2 49.Ke1 (49.Kd1 b1Q 50.Ke2 Rb2) 49...b1Q 50.Ke2 Rb3 (50...Rb2) ½-½. alessandrocarvalhaes (1920) - Mohaned0877 (1905), lichess.org, 2020.

4.a4 cb5 5.ab5 Qb6 6.e3 Nf6 7.c4 d5 8.Bf6 gf6 9.cd5 a4 (better 9...ed5!? 10.Nc3 Be6+–) 10.Ra4 Ra4 11.Qa4 Bd6 (11...ed5 12.Nc3 Be6 13.Be2+–) 12.Nc3 Bd7 (12...Nd7 13.de6 fe6 14.Nf3+–) 13.Nf3 0-0 (13...h5 14.Qh4 Rh6 15.Be2+–) 14.Qh4 Be7 (14...Kg7+–) 15.Bd3 e5 (15...f5 16.Qe7 Qd8 17.Qd8 Rd8+–) 16.Qh7 1–0. Pierre – GuestDQrQv, internet, 2020.

4.a4 Qb6 5.c4 d5 6.Nf3 dc4 7.Na3 cb5 8.ab5 Bd7 (8...Nf6 9.Nc4 Qb5 10.e3+=) 9.Nc4+/- Qb5? (better 9...Qc7!? 10.Qb3 Qc5+/-) 10.Bg7!+- Bg7? (better 10...Qc4 11.Bh8 b5+-) 11.Nd6 Ke7 12.Nb5 Bb5 13.d4 Nf6 (13...Bc6 14.e3+-) 14.Qb3 Bc6 15.Ra5! Ra5 16.Qb4 Kd7 17.Qa5 Na6 (17...Bf3 18.gf3 Nc6+-) 18.Ne5 (18.Ne5 Kd6 19.e3+-) 1-0. Vendelo – Lynnersi, internet, 2021.

4.a4 d5 5.e3 Nd7 6.Nf3 Ngf6 7.Be2 Bd6 8.0-0 0-0 9.d4 Re8 10.Nbd2 e5 11.de5 Ne5 12.Ne5 Be5 13.Be5 Re5 14.Nf3 Re8 15.c4 Be6 16.cd5 Bd5 17.Qc1 Ne4 18.Rd1 Qf6 19.bc6 Bc6 20.Nd4 Rac8 21.Rf1 Bd5 22.Qb2 Nc3 23.Bg4 Qg6 24.Bf3 Bf3 25.Nf3 Qd3 26.Qb7 Rc5 27.Nd4 Rg5 28.g3 h5 29.h4 Rg4 30.Rac1 Re3 31.Qc8 Kh7 32.Rc3 Qc3 33.Qf5 Kg8 34.fe3 Qe3 35.Qf2 Qf2 36.Kf2 Rd4 37.Ra1 g6 38.Kf3 Kg7 39.Ke3 Rg4 40.Ra3 Rg3 0–1. Orang4Utan (1890) – tlutard (1915), lichess.org, 2018.

4.a4 d5 5.e3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 a5).

4.a4 Nf6 5.e3 b6 6.Nf3 Bb7 7.Be2 (7.Na3 c5 8.Nc4 d5=) 7...cb5 8.ab5 (8.Bb5 Nc6+=) 8...Be7 (8...d5 9.c4=) 9.0-0 0-0 10.d3 Qc7 11.c4 Ng4 (11...d5 12.Nbd2+=) 12.h3 (12.Nbd2 d6+/–) 12...Bf3 13.hg4 Be2 14.Qe2 d6 15.Qf3 Nd7 16.Nd2 Ne5 17.Qg3 (better is 17.Qe2=) 17...Nd3–/+ 18.Bd4 Nc5 19.Bc5 Qc5 (19...bc5?! 20.Ra4+=) 20.Rac1 (20.Ra4 Qe5 21.Qe5 de5–+) 20...Rfd8 (20...a4 21.Ne4 Qe5 22.Qe5 de5 23.Rfd1–+) 21.Ne4 (21.Nb3 Qe5 22.f4 Qe4–+) 21...Qe5 22.Qe5 de5 23.Rfd1 (23.c5 bc5 24.Nc5 Rab8–+) 23...Rd1 24.Rd1 Rd8 (24...a4!? 25.c5 f5 26.gf5 ef5 27.Nd6 Bd6 28.Rd6–+) 25.Rd8 Bd8 26.Nd6 (better is 26.Nc3–+) 26...a4 27.Ne4 a3 28.Nc3 Kf8 29.Kf1 Be7 30.Ke2 f5 (30...Bb4 31.Na2 Bc5 32.e4–+) 31.f3 (31.Kd2 fg4 32.Kc2 h5–+) 31...Kf7 (31...Bb4 32.Na2 Bd6 33.gf5 ef5 34.Kd3–+) 32.gf5 (32.Kd3 Bc5 33.e4 fg4 34.fg4 Ke7–+) 32...ef5 33.Kd3 h5 34.Kc2 g5 35.Kb3? (35.Na4 h4 36.Nb6–+) 35...g4 36.Nb1 (36.fg4 fg4 37.Ne4–+) 36...gf3 37.gf3 h4 38.Na3 (38.Nd2–+) 38...Ba3 39.Ka3 h3 40.c5 h2 41.cb6 h1Q 42.b7 Qa1 (42...Qa1 43.Kb4 Qa7–+) 0–1. GuestQVBQ – GuestLCHL, freechess.org, 2017.

4.c4 cb5 5.cb5 Qb6 6.a4 d5 7.e3 Nd7 8.Nf3 f6 9.Be2 Nc5 10.Ba3 g5 11.Nd4 e5= 12.Bh5 Kd8 13.Nb3 Nd3=+ 14.Ke2 e4?? 15.Bf8+– Qe6 16.Bg7 Nb2 17.Qc2 Nc4 18.Bh8 g4 19.h3 f5 20.Bd4 Qh6 21.hg4 f4 22.Nc3 f3 23.gf3 ef3 24.Kf3 Qf8 25.Ke2 Na3 26.Ra3! Qa3 27.Bc5 (27.Bc5 Qc5 28.Nc5+–) 1–0. bcholy – gummi57, ChessWorld.net, 2005.

4.c4 cb5 5.cb5 Qb6 6.a4 d5 7.e3 Nf6 8.Nf3 (8.Bf6 gf6 9.Nc3 Bd7+=) 8...Bb4 (8...Nbd7 9.Be2=) 9.Be2 0-0 10.0-0 Nbd7 11.Qb3 Nc5 12.Qc2 Bd7 13.d4 (13.Bf6 gf6 14.Qb2 Qd8+=) 13...Nce4= 14.Qb3 Rac8 15.Rd1 (15.Ne5 Bd6=) 15...Rc7 (15...Ng4 16.Rf1=+) 16.Ne5= Rfc8 17.Nd2?? (better 17.f3 Nd6 18.Nd3=) 17...Nd2-+ 18.Nd7 (18.Qd3 Nc4 19.Nc4 dc4-+) 18…Nb3 (18...Nb3 19.Nb6 Na1 20.Ra1 Rd8-+) 0-1. ClayPigeons (2130) - zmagar (2260), Rated Bullet game, lichess.org, lichess.org, 2020.

4.c4 Qb6 5.e3+= d5 6.a4 Nd7 7.d4 Bb4 8.Nd2 dc4 9.Bc4+= Ngf6 10.Qc2 0-0 11.Ngf3 Re8 12.0-0 c5 13.Nb3 Qd6 14.Bd3 b6 15.Nfd2 Bb7 16.dc5 bc5 17.Nc4 Qd5 18.f3 e5 19.Rfd1 Qe6+/– 20.Bf5 Qe7 21.Bc3 g6 22.Bb4 cb4 23.Bd7 Nd7 24.Nba5 Nc5 25.Nd6 e4 26.f4 Nd3 27.Ne8 Re8 28.Nb7 Qb7 29.Rd3 ed3 30.Qd3 Qb6 31.Kf2 Rd8 32.Qc2 Rd4 33.Rb1?? Rf4+/– 34.Ke2 Rg4?? 35.Qc8+– (35.Qc8 Kg7 36.Qg4+–) 1–0. Nordbrink,Juergen – Karlsson,Ewald, corr, 1980.

4.c4 c5 5.e3 d5 6.a4 Nf6 7.Nf3 Bd6 8.Be2 0-0 9.0-0 Nbd7 10.d4 dc4 11.Bc4 (11.dc5 Bc5 12.Bc4 b6=) 11...cd4 (11...b6=) 12.Nd4 (12.Qd4 Qc7 13.Rd1+=) 12...b6?? (12...Bh2 13.Kh2 Qc7 14.Kg1 Qc4 15.Qb3=+) 13.Nc6 (better 13.Ne6 Bh2 14.Kh2 fe6 15.Be6 Kh8 16.Ba3+–) 13...Qc7=+ 14.h3 Bb7 15.Nd2 Bc6 16.bc6 Qc6 17.Rc1 Qb7 18.Bb5 Ne5 (18...Rad8 19.Qe2=+) 19.Nb3 (better 19.f4!? Ned7 20.Bc6+–) 19...Rfd8 20.Nd4 Qe7 (20...Rac8 21.Rc8 Qc8 22.Qa1=) 21.Qe2 (21.f4 Ned7 22.Nc6 Qf8 23.Nd8 Rd8+–) 21...Rac8 (21...Rdc8 22.f4 Ned7 23.Bc6=) 22.Rfd1 (22.f4!? Ng6 23.Nc6 Rc6 24.Rc6+–) 22...Nd5 (22...Rc1 23.Rc1 Qf8 24.f4=) 23.Nf5 White is in command 23...ef5 24.Rd5 Rc1 25.Bc1 Bb4 (25...f6 26.Qc2=) 26.Qd1 Rd5 27.Qd5 h6 (27...Qd6 28.Qa8 Qf8 29.Qb7=) 28.Bb2+= Bd6 29.Qd4 Qc7 (better 29...f6!?+=) 30.f4+– f6 31.fe5 Be5 32.Qd5 (32.Qc4 Qc4 33.Bc4 Kh7+–) 32...Kh7 33.Be5 Qc1? (better 33...Qe5 34.Qd4 Qc5+–) 34.Kh2 fe5 35.Qe5 (better 35.Bd7 Qc7 36.Bf5 g6 37.Be4+–) 35...Qf1 (35...Qc5 36.Qe6 Qc7 37.Kg1 g6+–) 36.Bd7 (36.Bf1 h5 37.Qf5 g6 38.Qf7 Kh6 39.Bd3 b5 40.Qg6) 36...g6 37.Qe7 Kh8 38.Qf8 (38.Qf8 Kh7 39.Qf7 Kh8 40.Be6 Qg2 41.Kg2 b5 42.Qg8) 1–0. BeepBeepImAJeep (2720) – imonahorse (2435), lichess.org, 2016.

4.c4 d5 5.e3 dc4 6.Bc4 cb5 7.Bb5 Bd7 8.Nc3 Nf6 9.Nf3 Bd6 10.a4 0-0 11.Qc2 Nc6 12.Ng5 h6 13.h4 Nb4 (13...hg5 14.hg5 Nb4 15.Qb1+/–) 14.Qb1 Bb5 (14...hg5 15.hg5 Bb5 16.Nb5+/–) 15.Nb5 Be7 (better is 15...e5!?+=) 16.Bf6+= Nd3 17.Ke2 (17.Ke2 gf6 18.Ne6 fe6 19.Qd3 Qd3 20.Kd3+/–) 1–0. combijack (1820) – aleatorical (1715), gameknot.com, 2011.

4.c4 d5 5.e3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 a5).

4.c4 Nf6 5.e3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 a5).

4.bc6 Nc6 5.e3 d5 6.Nf3 e5 (better is 6...Qb6!? 7.Bc3 Nf6=) 7.Ne5+/– Ne5 8.Be5 Qh4 (8...Ne7 9.Qh5+/–) 9.Bg3 Qe4 (better is 9...Qg5+–) 10.Nc3 Qe5 (10...Qf5 11.Bd3 Qg5+–) 11.Be5 Ne7 12.Bb5 (better is 12.Nb5 Kd7 13.Nc7 Ra7+–) 12...Nc6 13.Nd5 Bg4 14.Qg4 Bd6 15.Bd6. Fournier,Frederic (1625) – brothers, ChessOK.com, 2012.

4.e3 Nf6 5.Nf3 Nd5 6.c4 Nb6 7.a4 (7.Qc2 d5+=) 7...cb5 (7...d5 8.cd5 ed5 9.Qc2+=) 8.cb5+= Nd5 9.Nc3 Nc3 10.Bc3 d5 11.Bd3 Bd7 (11...Nd7 12.0-0+=) 12.Ra2 Qb6 13.Qa1 (better 13.Ng5 h5 14.Qa1+-) 13...Bb4?? (better 13...f6+/-) 14.Bg7+- Rg8 15.Bh7 Rg7 16.Qg7 Qc5 (16...Bf8 17.Qf6 Be7 18.Qh8 Bf8 19.Ne5+-) 17.0-0 (17.Rc2 Qf8 18.Qf8 Kf8+-) 17...d4 (17...Qf8 18.Qf8 Kf8 19.Rc2+-) 18.Ne5 (better 18.Be4 Ra7+-) 18...Qd5 (18...Qf8 19.Qf8 Kf8+-) 19.Rc2 Kd8 (19...d3 20.Rc4 Bc5+-) 20.Nf7 Ke8 21.Bg6 (21.Bg6 Bc6 22.Qh8 Ke7 23.Qh4 Kf8 24.e4 Kg7 25.Qh6 Kf6 26.Bh5 Ke7 27.ed5 Kd7 28.b6 Ke7 29.Qe6 Kf8 30.Nh6 Kg7 31.Qg6 Kh8 32.Nf7) 1-0. FeegLood (2390) – ALKA. Time forfeit, lichess.org, 2015.

4.a4 c6 5.e3 Bd7 6.c4 dc4 7.Bc4 cb5 8.ab5 Bb4?? 9.Bg7+- Qg5 10.Bh8 Qg2 11.Qf3 Qf3 12.Nf3 f6 (12...Ke7 13.Bc3 Bc3 14.Nc3+-) 13.Rg1 Kf7 (13...Ne7 14.Bf6 Bd6 15.Nc3+-) 14.Rg7 Kf8 15.Rh7 (better 15.Nd4 Ne7 16.Ne6 Be6 17.Be6 Ke8+-) 15...b6 (15...Bc5 16.Nc3 b6 17.Na4+-) 16.Ke2 (better 16.Nd4 e5 17.Ne6 Be6 18.Be6 a4+-) 16...Be8 (16...Bc5 17.Nc3 Ra7 18.d3+-) 17.Be6 (better 17.Nd4 Bd7 18.Ne6 Be6 19.Be6 a4+-) 17...Bb5 18.d3 (18.Kd1 Nc6 19.Rb7 Nd8 20.Bg7 Ke8 21.Rb6 Ne6 22.Rb5 Rc8+-) 18...Nc6 (18...Na6 19.Ba2 Nc5 20.Bg7 Ke7 21.Bh6 Kd8 22.Rh8 Bd3 23.Kd1+-) 19.Bd5 (19.Rb7!? Nd8 20.Rb6 Ne6 21.Rb5 Re8+-) 19...Rd8 20.Bg7 Ke7 (20...Ke8 21.Be4+-) 21.Bh6 (21.e4!? Kd6+-) 21...Kd6 22.Bg8 (22.Bc6 Bc6 23.Nd4 Nh6 24.Rh6 Rf8+-) 22...Rg8 23.Rg7 (23.Bf4!? Ke6 24.Bc7 Bc5+-) 23...Rd8 24.Bf4 (better 24.Na3 Ba6+-) 24...Ne5 (24...Ke6 25.Ne1 Be1 26.Ke1 Nb4+-) 25.Be5 fe5 26.Rg6 Kd5 (26...Ke7 27.Ne5 Bd6 28.Nc4+-) 27.e4 Kc5 28.Ne1 (better 28.Ne5 Be8 29.Rg5 Kd6+-) 28...Be1 29.Ke1 Bd3 30.Nd2 Kd4 (30...Kb5 31.Ra3 Rd4 32.Rb3 Kc5 33.Rbb6 Re4 34.Ne4 Be4 35.Rh6+-) 31.Ra4 (better 31.Rb6 Kc5 32.Rb3+-) 31...Kc3 (31...Kc5+-) 32.Rc6 Kb2 33.Rb6 Kc2 (33...Kc1 34.Ra1 Kc2 35.Rb3 Rc8 36.Ra2 Kc1 37.Rb1 Bb1 38.Nb3) 34.Ra2 (34.Rb3 Kc1 35.Ra2 Rc8 36.Rb1 Bb1 37.Nb3) 34...Kc3+- 35.Re6 (better 35.Ra5 Bc4 36.Ra3 Kd4+-) 35...Kd4 (35...Kb4 36.Re5 a4 37.Re7+-) 36.Ra5 (better 36.Ra4 Kc5 37.Ra5 Kb4 38.Rae5 Bc4+-) 36...Be4 37.Ne4 Ke4 38.Ree5 Kd4 (38...Kf4 39.Ke2+-) 39.f4 1-0. Wutendes_Heer (1945) - bvamrx (1920), lichess.org, 2021.

4.a4 Nd7 5.e3 Ngf6 6.Nf3 c5 7.Be2 b6 8.c4 Bb7 (8...Bd6 9.Na3=) 9.0-0 dc4 10.Bc4 Bd6 11.d4 Qc7 12.Nbd2 0-0 (12...cd4 13.ed4 Bf3 14.Qf3=+) 13.h3 (13.dc5 Nc5 14.Bf6 gf6=) 13...Rac8 14.Be2 cd4 15.Nd4 Nc5 16.Bf3 e5 (16...Bf3 17.Qf3 Nd3 18.Ba3=) 17.Nc6 (better 17.Bb7!? Nb7 18.Nc6+–) 17...e4 18.Be2 Bc6 19.bc6 Qc6 (19...Be5 20.Be5 Qe5 21.Bb5=) 20.Bb5 (20.Bf6 gf6 21.Bg4=) 20...Qd5 (20...Qb7!? 21.Bf6 gf6=) 21.Bf6+= gf6 22.Nc4 (22.Ne4!? Bh2 23.Kh2 Qe4 24.Qe2+–) 22...Qd1= 23.Rad1 Bc7 24.Rd5 Rfd8 25.Rfd1 Kf8 (25...f5 26.Rd8 Rd8 27.Rd8 Bd8 28.Nd6=) 26.g3 Rd5 27.Rd5 Ke7 (27...Rd8 28.Rd8 Bd8 29.Nd6=) 28.Rh5 (28.Na5 Be5 (worse 28...ba5 29.Rc5 Kd6 30.Rc6 Kd5 31.Rc4+–) 29.Nc6 Ke6+=) 28...Ne6 (28...Bd8 29.Nd2=) 29.Rh7+= Bd8 (29...Ng5 30.Rh5=) 30.Rh5 (30.Rf7! Kf7 31.Nd6 Kg6 32.Nc8+–) 30...Rc5+= 31.Rh4 (better 31.Rc5 bc5 32.Bc6+=) 31...Rd5? (better 31...f5 32.Rh6 Kf8 33.Rh8 Kg7=) 32.Re4+– Rd1 (32...f5 33.Rh4+–) 33.Kg2 f5 34.Rh4 Kf6 35.Rh8 Ke7 (35...Kg7 36.Rh5+–) 36.Re8 Kf6 37.h4 (37.Kf3 Rd3 38.Ne5 Rc3 39.Nd7 Kg7+–) 37...Rc1 (37...Kg7 38.Kf3+–) 38.h5 Be7 (38...Rd1 39.Rg8 Ng5 40.h6+–) 39.h6 (39.Nb6 Bd6+–) 39...Ng5 (39...Bf8 40.Rb8+–) 40.Nb6 Nh7 (40...Bc5 41.Nc4 Bb4+–) 41.Nd5 Kg6 42.Re7 Kh6 (42...Ng5 43.Ra7+–) 43.Nf4 (43.Rf7!? Ng5 44.Rf5 Ne4+–) 43...Kg7 44.Rd7 (44.Ra7 Ng5+–) 44...Kf6 (44...Nf8 45.Ra7+–) 45.Rd5 Ng5 46.Rd4 (46.Bd3 Ne4 47.Ra5 Nc5+–) 46...Ne6 (46...Ne4 47.Nd3 Rc2 48.Rd5+–) 47.Rc4 (47.Rd6 Ke7 48.Rd7 Kf6+–) 47...Ra1 (47...Rc4 48.Nd5 Ke5 49.Bc4+–) 48.Ne6 (better 48.Rc6+–) 48...Ra2 (48...fe6 49.Rc6+–) 49.Rc6 (better 49.Nf4 Ra1+–) 49...fe6 50.Bc4 (50.Re6! Ke6 51.Bc4 Kd6 52.Ba2 Kc5+–) 50...Ke5 (50...Ra4 51.Be6 Ra1+–) 51.Re6 1–0. BeepBeepImAJeep (2700) – GianFresco (2395), lichess.org, 2015.

4.e3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a5).

4.e3 Nf6 5.Nf3 (--> 1.b4 a5 2.b5 Nf6 3.Nf3 e6 4.Bb2 d5 5.e3).

4.e3 d5 5.Nf3 Nd7 6.c4 Ngf6 7.d4 Nb6 8.c5 Nc4 9.Bc4 dc4 10.Nbd2 Bd7 11.a4 (< 11.Nc4 Bb5 12.Nce5 Nd7+=) 11...Bc8 12.Nc4 Nd5 13.0-0 h6 14.Qc1 f5 15.Nce5 Bd7?? (better is 15...Qf6+–) 16.c6 (16.Ng6!? Qf6 17.Nh8 g6+–) 16...bc6 17.bc6 (17.Nc6?! Qf6+–; 17.Nd7?! Qd7 18.Ne5 Qd6+–) 17...Bc8 18.Ng6 Qf7 (18...Qf6 19.Nh8 g5+–) 19.Nh8 (19...Qf6 20.Ne5+–) 1–0. Wall,Bill – Tattoo, Microsoft Gaming Zone, 2004.

4.e3 f6 5.Nf3 g5 6.c4 Bg7 7.a4 h5 8.d4 f5 9.Be2 c5 10.Ne5 cd4 11.Bd4 Qb4 12.Nd2 Qd6 13.Bh5 Rh5 14.Qh5 Ke7 15.Ng6 Kd8 16.Qg5 Bf6 17.Bf6 Nf6 18.Qf6 Kc7 19.Nf3 b6 20.0-0 Bb7 21.Nfe5 Bg2 22.Kg2 Nc6 23.bc6 Rg8 24.cd7 f4 25.Kh1 fe3 26.fe3 b5 27.ab5 Qb6 28.Rfe1 Qb7 29.Nc6 Qa8 30.Qe6 Qf8 31.Qe5 Kb6 32.Qd4 Kc7 33.b6 Kb7 34.Nf4 Qg7 35.Qg7 Rg7 36.d8Q Kc6 37.Red1 Rb7 38.Rd6 Kc5 39.Qc8 Kd6 40.Qb7 Ke5 41.Qd5 Kf6 42.Rg1 Ke7 43.Qe6 Kd8 44.Rg7 1–0. axtur777 – Alx_Chess, lichess.org, 2019.

4.e3 d5 5.Nf3 (--> 1.b4 a5 2.b5 Nf6 3.Nf3 e6 4.Bb2 d5 5.e3).

4.e3 Be7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 Be7 4.e3 a5).

4.e3 c6 5.Nf3 Qf5 6.c4 cb5 7.cb5 b6 8.a4 Bb7 9.Be2 Nf6 10.0-0 Bd6 11.Nc3 Ng4 12.h3 Bf3 13.Bf3 Ne5 14.Ba8 g5 15.Ne4 Bc7 16.Ng3 Qg6 17.Be4 f5 18.Bc2 Qh6 19.f4 gf4 20.ef4 Ng6 21.Bh8 Nh8 22.Qh5 Qh5 23.Nh5 Ng6 24.Nf6 Ke7 25.Nh7 Nf4 26.Ng5 Ne2 27.Kf2 Nd4 28.Bd3 Kf6 29.Nf3 Nf3 30.Kf3 d5 31.Rac1 Bd6 32.Ke2 Nd7 33.Rc6 Be7 34.Rf5 Kg7 35.Re6 Bf6 36.Rd5 Ne5 37.Rde5 Be5 38.Re5 Kf6 39.Rf5 Kg6 40.g4 Kh6 41.Kf3 Kg6 42.Rc5 Kf6 43.Rc6 Kg5 44.Kg3 ½–½. Abdullaevich (1800) – welliton2121, lichess.org, 2018.

4.Nf3 Qb5 5.Qc1 Nc6 6.e3 Qh5 7.Be2 Qg6 8.0-0 Bd6 9.d4 a4 10.a3 Nge7 11.c4 Nf5 12.Bd3 Qh5 13.c5 Be7 14.Nbd2 0-0 15.e4 Nh6 0–1. Orang4Utan (1725) – DamienStClaire (1700), lichess.org, 2017.

3.a3 c5 4.bc5 Nf6 5.d4 Nc6 6.Nf3 b6 7.cb6 Qb6 8.Qc1 (8.Ra2 Rb8+=) 8...Bb7 (8...Rb8 9.Ra2=) 9.c4+= Be7 10.c5 Qc7 11.Nc3 0-0 (11...d6 12.cd6 Qd6 13.Qd1+=) 12.e3 (12.e4 Rfc8+/-) 12...d6 13.cd6 Bd6 14.Be2 Rac8 15.0-0 (15.e4 e5 16.d5 Nd4+=) 15...e5 16.d5 Ne7 (16...Na5!? 17.Qb1 Nb3+=) 17.e4+/- Qb8 18.Qd2 Ng6 19.g3 (19.Rab1 Nf4 20.Bd3 Nd3 21.Qd3 Rc5+/-) 19...h5 (19...Rc3 20.Qc3 Ne4 21.Qb3+/-) 20.Rfe1 h4 21.Bf1 Rfd8 22.Rab1 Qa7 (22...hg3 23.hg3 Rc7 24.Rec1+/-) 23.Na4 (23.Nh4 Nh4 24.gh4 Rc7+-) 23...hg3+/- 24.hg3 Ng4 (better 24...Rc7+/-) 25.Qg5?? (better 25.Bh3 Rc4 26.Bg4 Ra4 27.Bh5+-) 25...Qf2-+ 26.Kh1 Qf3 27.Bg2 Qg3 28.Qd2 Qh2 0-1. black_bishop_88 (2530) - Nezh2 (2030), 1st CL WorldCup Semifinal, lichess.org, 2020. (=1.a3 e6 2.b4 a6 3.Bb2)

3.a3 c6 4.Nf3 b5 5.e3 Bb7 6.Be2 d6 7.0-0 Nf6 8.c4 h6 9.cb5 ab5 10.d4 g5 11.h3 Bg7 12.Nbd2 Nfd7 13.Qc2 e5 (13...Nf6!?+=) 14.de5+/– de5 15.Rfd1 Qc7 (15...0-0+–) 16.Ne4 Na6?! (16...0-0+–) 17.Nd6 Kf8 18.Nb7 (better is 18.Qb3!? Nb6 19.Ne5 Nd5 20.Ndf7 Rh7+–) 18...Qb7 19.Qd3 Re8?? (better is 19...e4 20.Bg7 Kg7 21.Qe4 Rhe8+–) 20.Qd7 Qd7 21.Rd7 Rg8 22.Rad1 e4 23.Bg7 Rg7 24.Nd4 c5 25.bc5 Nc5 26.Rc7 Na4 27.Bb5 Nc3 28.Rc3 Rd8 29.Rdc1 f5 30.Nf5 Rf7 31.Nh6 Rf6 32.Ng4 Rg6 33.Rc8 Rc8 34.Rc8 Ke7 35.a4 Rd6 36.Rc7 Kd8 37.Rd7! Rd7 38.Bd7 Kd7 39.Nf6 Kc7 40.Ne4 Kb6 41.Ng5 Ka5 42.h4 Ka4 43.h5 Kb4 44.h6 Kc5 45.h7 Kd6 46.h8Q (46.h8Q Kc7 47.Qe5 Kb6 48.e4 Kc6 49.Qd5 Kc7 50.Ne6 Kb6 51.Qc5 Kb7 52.Qb5 Kc8 53.Qc6 Kb8 54.Qb6 Kc8 55.Qc7) 1–0. Fournier,Frederic (1880) – nachofranco, Active, 2008.

3.a3 Bd6?? 4.Bg7+– Be7 (4...Be5 5.Be5 Nf6 6.Bb2+–) 5.Bh8 Bf6 6.Bf6 Qf6 7.Nc3 d5 8.Nf3 Nc6 9.e3 e5 (9...Nge7 10.b5 ab5 11.Bb5+–) 10.Nd5 Qd6 11.c4 e4 (11...Be6 12.Qc2 h6 13.Bd3+–) 12.Ng1 (better is 12.Ng5!? Nf6 13.Nf6 Qf6 14.Ne4 Qe5+–) 12...Be6 13.d3 Bd5 14.cd5 Qd5 15.de4 Qe4 16.Nf3 h6 17.Bd3 Qg4 18.0-0 Nf6 19.Nd4! Nd4 20.Qg4 Ng4 21.ed4 0-0-0 (21...c6+–) 22.Bf5 Kb8 23.Bg4 Rd4 24.Bf3 f5 (24...c6 25.Rad1 Rd1 26.Rd1+–) 25.Rfd1 Rc4 26.Rac1 Rc1 27.Rc1 Kc8 28.Rc5 f4 29.Rf5 c6 30.Rf4 b5 31.Rf7 h5 32.Bc6 Kd8 33.f4 Kc8 34.f5 Kd8 (34...h4 35.f6 a5 36.Rb7 a4 37.f7 Kd8 38.f8Q) 35.f6 Kc8 36.Rd7 Kb8 (36...h4 37.f7 a5 38.f8Q) 37.f7 Kc8 38.f8R (38.f8Q) 1–0. Knight32 – glo1, ChessWorld.net, 2012.

3.a4 b5 4.ab5 Bb7 5.ba6 Na6 6.b5 Nc5 7.e3 (7.Ra8 Ba8 8.Nf3 Bf3 9.ef3 d5+/-) 7...Ra1+= 8.Ba1 Qa8 9.Bc3 Bg2 10.Qg4?? (better 10.Bg2 Qg2 11.Qf3 Qf3 12.Nf3+=) 10...Bf1 11.Bg7 Qh1 12.Bh8 (12.Kf1 Nh6 13.Bh6 Bh6 14.Qf3 Qf3 15.Nf3-+) 12...Nh6 13.Qg3 Bg2 14.Nc3 (14.d3 Nf5 15.Qc7 Qg1 16.Kd2-+) 14...Qg1 15.Ke2 Qf1 0-1. BeepBeepImAJeep (2720) - TwelveTeen (2620), lichess.org, 2016.

3.a4 b6 4.e3 Nf6 5.b5 Bb7 6.c4 Be7 7.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 a6 7.a4).

3.a4 c6 4.e3 Bb4?? 5.Bg7+- Qh4 (5...d5 6.Bh8 Nf6 7.Nf3+-) 6.Bh8 Bd6 (6...d5 7.Bd3+-) 7.Nf3 (7.Nf3 Qh5 8.a5+-) 1-0. DEFFM – GuestMXRW, freechess.org, 2021.

3.a4 Ne7 4.e3 Ng6 5.b5 f6 6.c4 (6.Bd3 Qe7=) 6...Be7 7.Nf3 0-0 8.Be2 c6 (8...b6 9.0-0=) 9.0-0 d5 10.d4 Qc7 11.Nbd2 Nd7 12.Qb3 Kh8 (12...b6 13.Rac1 cb5 14.ab5+– (14.cb5?! Qd8+=)) 13.Rfc1+– dc4 (13...Qa5 14.Bc3 Qd8 15.cd5 cd5 16.a5+–) 14.Nc4 Nb6 (14...ab5!? 15.ab5 Ra1 16.Ra1 cb5 17.Qb5 b6+–) 15.bc6+– Nc4 16.Rc4 (16.Qc4 Rb8+–) 16...e5 (16...bc6 17.Bd3+–) 17.d5 (17.cb7 Qb7 18.Qb7 Bb7 19.de5 Bf3 20.Bf3 Rab8 21.ef6 Bf6 22.Bf6 Rf6+–) 17...bc6 18.Rc6 (18.dc6?! Rb8 19.Qc2 Be6=) 18...Qd7 19.Ba3 (19.Rd1!?+–) 19...Ba3 (19...Bb7 20.Be7 Ne7 21.Rb6 Bd5 22.Rd1=) 20.Ra3 (20.Qa3 Qd5 21.Rd6 Qb7+=) 20...Bb7 21.Rc5 Rab8 (21...Rac8 22.Rc8 Rc8 23.e4 Rc1 24.Bf1+=) 22.Qc2 Bd5? White creates threats along the open d–file (better 22...Rfc8 23.e4 f5+–) 23.Rd3+– (23.Ba6 Bf3 24.gf3 Nh4=+) 23...Ne7 24.e4! Be4 Exploits the pin (better 24...Qb7 25.Rc7 Bb3+–) 25.Rd7 Discovered attack 25...Bc2 26.Rc2 (26.Re7?! Rb1 27.Bf1 Bd3+=) 26...Nf5 (26...Rb1 27.Bf1 Ng6 28.Ra7+–) 27.g4 Nh6 28.h3 Nf7 (28...a5 29.Rcc7 Rg8 30.g5 fg5 31.Bc4+–) 29.Rcc7 Ng5 (29...e4 30.Nd4 Rfd8 31.Rd8 Nd8 32.Ba6 h5+–) 30.Ng5 fg5 31.Rg7 Rb1 (31...Rf4 32.a5 Rc8 33.Rh7 Kg8 34.Rcg7 Kf8 35.Ra7+–) 32.Kg2 (32.Kg2 Rf4 33.Rh7 Kg8 34.Rh5+–) 1–0. BeepBeepImAJeep – Lerto (2005), lichess.org, 2016.

3.a4 h6 4.e3 d5 5.b5 a5 (5...Nf6 6.Nf3=) 6.Nf3 c6 7.Be2 c5 8.c4 Nf6 9.0-0 d4 (better 9...Bd6!?+=) 10.ed4+- cd4 11.Bd4 Be7 12.Qc2 b6 13.c5 Nbd7 (13...bc5!? 14.Bc5 Bc5 15.Qc5 Nbd7+/-) 14.c6+- Nc5 15.Bc5 (15.Nc3!? 0-0+-) 15...Bc5 16.d4! Bd6 (16...Bd4 17.c7 Passed pawn) 17.Nbd2 Qc7 18.Nc4 Bb4 19.Nfe5 0-0 20.Bd3 Nd5 21.Bh7 Kh8 22.Be4 Bc3 23.Rad1 Bb4 24.Rd3 Bd6 (24...Re8 25.Rc1+-) 25.Bd5 ed5 26.Nd6 Qd6 27.Rg3 Qf6?? (better 27...Qb4+-) 28.Rf3 Qe7 (28...Qe6 29.Ng6!! Kg8 30.Nf8+-) 29.Rf7! Rf7 (29...Rf7 30.Ng6 Double attack) 30.Ng6 Kg8 31.Ne7 Re7 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

3.c4 Bb4?? 4.Bg7 d5 5.Nf3 dc4 6.Qa4 Nc6 7.a3 Ba5 (7...b5 8.Qc2 Nf6 9.Bh8+– (9.ab4?! Rg8 10.Bf6 Qf6+–)) 8.Qc4 Qd5 9.e3 Qc4 10.Bc4 Nf6 11.Bh8 (worse is 11.Bf6 Rg8 12.Bd3 h6+–) 11...Nd5 12.Bb2 b5 13.Bd5 ed5 14.0-0 (14.Ke2 Be6+–) 14...Bf5 15.d4 h6 16.Nc3 Be6 17.Rfc1 f6 (17...Ne7 18.h3+–) 18.Ne2 (18.Nb5 Kd7 19.Nc3 Rb8+–) 18...Bd7 19.Nf4 Ne7 20.Bc3 Bb6 21.Bb4 Nc6 (21...c6 22.Kf1+–) 22.Nd5 a5 (22...Kf7 23.Bd6!+–) 23.Bc5 (better is 23.Nf6 Kd8 24.Bf8 h5+–) 23...a4 (23...Kd8+–) 24.Bb6 cb6 25.Nc7 Ke7 26.Na8 f5 27.Nb6 Be8 28.Rc5 Ke6 29.Rac1 (better is 29.d5 Kd6 30.dc6 Bc6 31.Rf5 Kc7 32.Nd5 Kb8+–) 29...b4 30.ab4 (30.d5 Kf7 31.dc6 Bc6 32.Rc6 Kg7 33.Rd1 Kf8 34.Rd7 ba3 35.Rc8#) 30...Nb4 31.Re5 Kf6 32.Re8 a3 33.Ra1 Nc2 34.Ra2 Nb4+– 35.Ra3 Nc6 36.Nd5 Kf7 37.Raa8 h5 38.Ng5 Kg6 39.Rg8 Kh6 40.Nf7 Kh7 41.Nf6# 1–0. algernon (2165) – valerypavlovich (2100), net–chess.com, 2012.

3.e3 Bb4?? 4.Bg7 Be7 5.Bh8 Bf6 6.Bf6 Qf6 7.Nc3 d5 8.Nf3 Ne7 9.Be2 (9.d4 Nbc6+-) 9...Nd7 10.0-0 c5 11.d4 c4 (11...cd4 12.ed4 Ng6 13.Bd3+-) 12.a4 h5 13.Ne5 (13.e4 Qf4+-) 13...h4 (13...Ne5 14.de5 Qe5 15.Qd2+-) 14.Nd7 Bd7 15.h3 Bc6 16.Bf3 Kd7 17.e4 Rg8 18.ed5 ed5 19.Re1 Kc7 20.Rb1 Qd6 (20...Kd8 21.a5+-) 21.Re5 (21.Re7 Qe7 22.Nd5 Bd5 23.Bd5 Rb8+-) 21...f6 (21...Kd8 22.Qd2+-) 22.Re3 (22.Re7 Qe7 23.Nd5 Bd5 24.Bd5 Rb8 25.Bc4 Qd6+-) 22...Nf5 23.Re2 Qa3 (23...Rg7 24.Qd2+-) 24.Nd5 Kb8 25.Re6 Rg5 (25...Ka7+-) 26.Rc6 Qa4 27.Rcb6 (27.Rcb6 Rg7 28.Rb7 Rb7 29.Rb7 Kb7 30.Nc3 Qc6 31.Bc6 Kc6 32.Qf3 Kd6 33.Qf5 Ke7 34.d5 a5 35.Qe6 Kf8 36.Qf6 Kg8 37.d6 Kh7 38.d7 a4 39.d8Q a3 40.Qdh8) 1-0. brucepeng (2045) - LEONPIRU (2030), lichess.org, 2020.

3.e3 b6 4.Nf3 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.e3 e6 4.Nf3 a6).

3.e3 c5 4.bc5+= Bc5?? (better is 4...Nf6+= 5.d4 b6 6.cb6 Qb6 7.Bc1 Nc6 8.Nf3 Rb8) 5.Bg7+– Qb6 (5...d5 6.Bh8 Nc6 7.d4 Bb4 8.c3+–) 6.Bh8 Nc6 7.Nc3 Nb4 8.a3 Nd5 9.Na4 Qa5 10.Nc5 Qc5 11.Bd4 Qa5 12.e4 Ndf6 13.e5 Nd5 14.c4 Nde7 15.Nf3 Nc6 16.Bc3 Qc5 17.Qc2 Ne5 18.Be5 b5 19.Qh7 Qf8 20.Bg7 Nf6 21.Bf6 Bb7 22.Ne5 1–0. marre – MentalConfusion, internet, 2010.

3.e3 d5 4.c4 c6 5.a4 Nf6 6.b5 ab5 7.ab5 Ra1 8.Ba1 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4).

3.e3 d6 4.c4 b6 5.Nf3 h6 6.d4 Nd7 7.Bd3 Ne7 8.0-0+/– g5 9.Nbd2 Bg7 10.Qc2 Bb7 11.Rac1 g4 12.Ne1 h5 13.c5 Nf6 14.e4 Bh6 15.Rd1 b5 16.a4 Nc6 17.Qb3 ba4 18.Qa4 0-0 19.Nc2 h4 20.Qa1 a5+= 21.b5 Nb4 22.Nb4 ab4 23.Qb1 g3 24.Nf3 gf2 25.Kh1 Ng4 26.c6 Bc8 27.Bc1 Ne3 28.Be3 Be3 29.Qb4 h3 30.g3 e5+= 31.de5 Ra2= 32.Be2 Re2 33.Qc4 Re1 34.Ne1 Bg4 35.Qd3 Bd1 (35...Bd1 36.Qe3 fe1Q (36...fe1B?! 37.Rf6 Bh5 38.Qg5 Bg6 39.Rg6 fg6 40.Qg6 Kh8 41.Qh6 Kg8 42.Qg6 Kh8 43.Qh6 Kg8 44.Qg6=; 36...fe1N?! 37.ed6 Qd6 38.Re1–/+; 36...fe1R?! 37.Qe1 Bh5 38.ed6 Qd6 39.Qe3–+) 37.Qe1 Bh5–+) 0–1. Roldan,Antonio – Mary,Laurent, IECG, 1999.

3.e3 h6 4.a3 d6 5.c4 (5.Nf3 e5=) 5...Ne7 (5...a5 6.Nf3=) 6.Nf3 Nd7 7.d4 g5 (7...a5 8.b5+=) 8.d5 e5 9.e4 Ng6 10.Nbd2 Nf6 11.Bd3 (11.h3 Be7+=) 11...g4= 12.c5?? (better 12.Ng1=) 12...gf3–+ 13.Qf3? (13.Nf3 Nf4 14.g3 Nd3 15.Qd3 Bh3–+) 13...Nf4 (better 13...Nh4 14.Qd1 Ng2 15.Kf1 Bh3–+) 14.cd6 Bd6 (14...Qd6?! 15.Nc4 Nd3 16.Qd3–/+) 15.Nc4 (15.Bf1–+) 15...Bg4 16.Qg3 h5 (better 16...Rg8 17.Bc2 Bf5 18.ef5 Rg3 19.hg3 N4d5 (19...Ng2?! 20.Kf1–+) 20.Rh6 Bf8–+) 17.Ne5–/+ Nd3 18.Qd3 Qe7 19.Ng4? (better 19.f4!?=+) 19...hg4–+ 20.0-0?? (20.0-0-0 Rh5–+ (worse 20...Bh2 21.g3–/+)) 20...0-0-0 (better 20...Bh2 21.Kh1 Qf8 22.Qh3 gh3 23.g3–+) 21.Rfe1?? (21.e5 Be5 22.Qf5 Nd7–+) 21...Be5 (better 21...Bh2 22.Kf1 Be5 23.Be5 Qe5–+) 22.Be5 Qe5 23.g3 (23.Qg3 Rde8–+) 23...Nd7 (23...Qh5!? 24.h4 gh3 25.Rac1–+) 24.Rac1 (24.f4 gf3 25.Qf3 Nf6–+) 24...Qh5 25.Qc3?? (25.Kf1–+) 25...Qh2 26.Kf1 Do you see the mate threat? 26...Qh1 27.Ke2 Qe4 28.Kd1 Qd5 29.Kc2 c6 30.Red1 (30.Kb1 Rh2 31.Rc2 Qf5–+) 30...Qa2 (better 30...Qf5 31.Kb2 Rh2–+) 31.Kd3 (31.Qb2 Qe6 32.Kb1–+) 31...Qf2 (31...Nc5! 32.Ke3 Rde8 33.Qe5 Re5 34.Kf4 Qf2 35.Ke5 Re8 36.Kd6 Ne4) 32.Rd2 (32.Kc4 Rh2 33.Kb3 Qa2 34.Ka4 Nb6 35.Ka5 Rd1 36.Kb6 Qf2 37.Qc5 Rc1 38.Qf2 Rf2 39.Ka5 Kc7 40.b5 Rc4 41.b6 Kd6 42.a4 Rf5) 32...Qg3 (32...Qf5 33.Ke2 Rde8 34.Qe3 Qf3 35.Kd3 Re3 36.Kc2 Ra3 37.Kb1 Qe4 38.Rdc2 Rh2 39.b5 Qb4 40.Rb2 Qb2) 33.Kc2 Qc3 34.Kc3 Nb6 (34...Nb6 35.Rd8 Rd8–+) 0–1. sirgeshdb (1895) – Val_1 (1895), lichess.org, 2020.

3.e4 Bb4?? 4.Bg7 h5 5.Bh8 Nh6 (5...Qh4 6.Qf3+–) 6.Qh5 Ng8 (6...Bf8 7.g4 Qe7 8.g5+–) 7.e5 (better is 7.Bg7 Nc6+–) 7...d6 (7...Nc6 8.Nf3 Bf8 9.Qh7+–) 8.Qh7 (better is 8.Qg4 Ne7 9.Qb4 Nbc6+–) 8...Ke7 (8...Qg5 9.c3 Bc5 10.Nf3+–) 9.Qg7 (better is 9.Qh4 Ke8 10.Qb4 de5+–) 9...de5 10.Nf3 (10.h4 Nc6+–) 10...e4 (10...Nc6 11.Ne5 Ne5 12.Qe5+–) 11.Ne5 Nc6 (11...Qe8 12.Nc3 e3 13.Ne4 ed2 14.Kd1+–) 12.c4 (better is 12.Qf7 Kd6 13.Nc4 Kc5+–) 12…Nd4 (12...Nd4 13.Qg5 f6 14.Qg7 Kd6 15.Nf7 Kd7 16.Nd8 Ne7+–; 12...Ne5 13.Qe5 Bd7+–). Pumphut – Anji, internet, 2003.

3.e4 d5 4.ed5 (4.Nc3 Nf6 (4...d4 5.Nce2 Nc6 6.Nf3 e5 7.c3 dc3 8.Nc3 Nf6 9.b5 ab5; 4...Nc6 5.ed5 ed5 6.Nf3 Nf6 7.a3 Bd6 8.Bd3 Qe7 9.Qe2 Qe2) 5.e5 Nfd7 6.Nf3 Bb4 7.Be2 c5 8.a3 Ba5 9.d4 Nc6) 4...Qd5 (4...ed5 5.Nf3 Nf6 6.a3 Bd6 7.Bd3 Qe7 8.Qe2 Qe2 9.Ke2 0-0; 4...Nf6 5.Nf3 ed5 6.Bd3 Bb4 7.Qe2 Be7 8.Bf6 gf6 9.0-0 Nc6) 5.c4 (5.Nc3 Qe5 (5...Qd6 6.a3 Nf6 7.Nf3 Nc6 8.Bd3 Be7 9.0-0 0-0) 6.Qe2 (6.Be2 Nf6 7.Nf3 Qd6 8.b5 Qb6 9.a4 Bb4) 6...Qe2 7.Nce2 (7.Be2 Nc6 8.a3 Nf6 9.Nf3 Bd6) 7...Nc6= (7...Bb4? 8.Bg7 Nc6 9.Bh8+–; 7...Nf6 8.a3 a5 9.b5 Bd6) 8.a3 Nf6 9.Nf3 Bd7) 5...Qe4 6.Qe2 (6.Be2 Qg2 7.Bf3 Qg6 8.Ne2 Nf6 9.Qa4 Bd7) 6...Qg6 (6...Qc2 7.Be5 f6 8.Na3 Qa4 9.Bb2 Nc6) 7.a3 (7.Nf3 Nc6 8.a3 Qc2 9.d4 Nb4) 7...c5 (7...Nc6 8.Nf3 Nf6 9.Nc3 Bd6) 8.b5 (8.Qe5 Nc6 (8...cb4 9.Qg3 Nc6) 9.Qe2 (9.Qg3 cb4) 9...Nf6–/+ – (9...cb4–/+); 8.Nc3 Nf6 9.Nd5 Nd5) 8...Be7 (8...ab5 9.cb5 Nd7) 9.Nf3 (9.Nc3 Nf6) 9...Nd7 (9...ab5+=) 10.d4 ab5 11.cb5 Bf6 12.dc5 Ra4 13.Kd1 (13.Bf6 Qf6 14.Ra2 Nc5=) 13...Nc5 14.Qc2 (14.Ne5 Qf5 15.Ke1 Re4–+) 14...Qc2 15.Kc2 Ne4 16.Nc3 Nf2 17.Na4 Nh1 18.Nb6 Ne7 (18...Bb2 19.Kb2 Ne7 20.Rc1=) 19.a4 (19.Bf6 gf6 20.Bd3 Nf2=) 19...0-0 (19...Bb2 20.Kb2 Nf2 21.Rc1=) 20.a5 (better is 20.Bf6 gf6 21.Bd3=) 20...Nd5?? (better is 20...Bb2!? 21.Kb2 Nd5+=) 21.Nd5+= ed5 22.Bf6 gf6 23.a6 b6 24.Bc4 dc4+/– 25.Rh1 Rd8 26.Rd1 Bf5+= 27.Kc1 Bd3 28.Ne1 Kf8 29.Nd3 cd3 30.Kd2 Ke7 31.Rc1 Kd6? 32.Rc6 Kd5 33.Rb6 Kc4 34.a7 Rg8 35.g3 Ra8 36.Rb7 Re8 37.Rb8 (37.Rb8 Re2 38.Kd1+–) 1–0. Stabenow,Juergen – Diener,Rudolf, corr SOK–87–08, 1988.

3.e4 d6 4.Nf3 h6 (4...d5 5.ed5 ed5 6.Qe2 Qe7 7.c4=) 5.Bc4 (5.Nc3 Nc6+=) 5...Qe7 (5...Nf6 6.Nc3=) 6.0-0 (6.a3 d5 7.ed5 ed5 8.Be2 Be6+=) 6...e5 (6...d5!? 7.ed5 Qb4=) 7.Nc3 g5? (better is 7...Nf6+=) 8.Nd5+– Qd8 9.d4 (9.Ne5 Rh7 10.Ng4 Bg7+–) 9...Bg7 (better is 9...c6 10.Ne3 g4+/–) 10.de5+– de5 11.Be5 Be5 12.Ne5 Bd7?? 13.Nc3 f6?? 14.Nf7 Qe7+– 15.Nh8 Nc6 16.Ng6 Qb4 17.Qd3 0-0-0 18.Nd5 Qd6 19.Rad1 Nge7 20.Nge7 Ne7 21.Ne7 Qe7 22.Ba6 ba6 23.Qa6 Kb8 24.Rb1 (24.Rb1 Qb4 25.Rb4 Bb5 26.Rb5#) 1–0. TriAngel – UncleTupelo, ICC, 1999.

3.Nf3 Bb4?? 4.Bg7+– Nh6 5.Bh8 (worse is 5.Bh6 d5+–) 5...Ng4 6.a3 Bc5 7.d4 Bb6 8.e4 Ke7 9.Bg7 Qg8 10.Be5 d6 11.Bg3 f5 12.e5 Bd7 13.h3 Nh6 (13...Ba5 14.Nbd2 Nh6 15.c4+–) 14.ed6 cd6 15.Qd2 Nc6 (15...Nf7 16.Qb4 Bb5 17.c4+–) 16.Qh6 Re8 (16...Bc7+–) 17.Bh4 Kf7 (17...Qg5 18.Bg5 Kf7 19.Qh7 Kf8 20.Bh6#) 18.Qf6# 1–0. b4_player (2185) – Ruz_t_Shackleford (1695), GameColony.com, 2003.

3.Nf3 b6 4.e3 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.e3 e6 4.Nf3 a6).

3.Nf3 c5 4.bc5+= Nc6 (4...Nf6 5.Ba3+=) 5.d4 Qc7 (5...b6 6.cb6 Qb6 7.Bc1+=) 6.Nc3 (6.e4 d6+/–) 6...d6 7.cd6 Bd6 8.e4 (8.d5 Nd8+/–) 8...Qb6 (8...Nge7 9.Bd3+/–) 9.Rb1 Qc7 (9...Qa5 10.Be2+/–) 10.e5 (10.Be2 b5+/–) 10...Be7 (10...Bb4 11.Qd2+/–) 11.Bd3 Qa5 (11...b5 12.0-0+/–) 12.0-0 Bb4 (12...Nb4 13.Be4+/–) 13.Qd2 Nd4? (better is 13...b6+–) 14.Nd4 Qe5 15.Rfe1 Qd4 (15...Qa5+–) 16.Bb5! Bd7 (16...ab5 17.Qd4) 17.Qd4 (17.Qd4 Bb5 18.Qg7 Bc3 19.Bc3+–) 1–0. Wall,Bill – Northbound, internet, 2003.

3.g3 Nc6 4.a3 Nf6 5.Bg2 Be7 6.e3 d5 7.Ne2 b5 8.Nbc3 Ne5 (better is 8...0-0!?+=) 9.Nd5+/– Bd6?? (better is 9...ed5 10.Be5 0-0+/–) 10.Nf6+– Qf6 11.Ba8 Nf3 12.Kf1 Qb2 13.Bf3 0-0 (13...Qf6 14.Bc6 Kf8 15.Kg2+–) 14.Nc3 (14.Nc3 Bb4 15.ab4 Qb4 16.Kg2+–) 1–0. marekt – Heimdallr, ChessWorld.net, 2012.

3.g3 Nf6 4.a3 d5 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.g3 a6).

4.Nc3 Be7 5.Nf3 Bb7 6.e4 d6 7.d3 Bf6 8.Be2 Nc6 9.0-0 Nd4 10.Nd4 Bd4 11.h3 Ba7?? (11...c5 12.Qd2=) 12.Bf3 (better is 12.Nb5!? Nf6 13.Na7 Ra7 14.Bd4+–) 12...f6 (12...Bd4 13.a4=) 13.Ne2 Ne7 (13...e5 14.d4+=) 14.Ng3 (14.Nf4 Kf7 15.Bh5 g6+/–) 14...h6 (better is 14...0-0!?=) 15.Bh5+/– g6 16.Bg4 Qd7 (16...e5 17.Be6+=) 17.Bf6+/– Rg8 (17...0-0 18.Bb2+/–) 18.c4 h5 19.Bf3 bc4 20.dc4 e5 21.Be7 (21.Be2 Qe6 22.Bg5 Bd4+/–) 21...Qe7 22.Rc1 Qh4 (22...Rf8 23.Rb1+/–) 23.c5 dc5 24.bc5 Rd8?? (24...Rg7 25.Qa4 c6 26.Be2+/–) 25.Qa4 (better is 25.Qb3 Bd5 26.ed5+–) 25...c6+/– 26.Rfd1 Rd1 27.Rd1 Rg7 28.Rd5 Qe7 29.Ne2 Attacking the isolated pawn on c5 29...Kf8 30.Nc1?? Bc5 31.Rd3= Qh4 32.Kh2?? Bf2?? 33.Qb4 Kg8 34.Bd1 Qf4 35.Kh1 Qc1?? 36.Rd8+– Kh7 37.Qf8 Kh6 38.Qh8 Rh7= 39.Qe5?? Bh4 40.g4?? Bd8 41.Qd4 Bg5 (41...Bg5 42.gh5 c5–+; better is 41...c5!? 42.Qd3 Be4 43.Qe4 Qd1 44.Kg2 Qd2 45.Kh1–+) 0–1. I need chocolate... – kingsknight59, ChessWorld.net, 2005.

4.e3 Bb7 5.Nf3 Nf6 6.Be2 d5 7.0-0 Nbd7 8.d3 Bd6 9.c4 dc4 10.dc4 bc4 11.Bc4 0-0 12.Nd4 Ne5 13.Be2 Rc8 14.Nd2 c5 15.bc5 Rc5 16.Qb3 Bd5 17.Qb6?? Qb6–+ (17...Qb6 18.Rab1 Ba2–+) 0–1. elsh1403 (1620) – delcrimar, kurnik, 2011.

4.Nf3 Bb7 5.c4 bc4 6.Nc3 d5 7.d4 cd3 8.Qd3 Nf6 9.e3 Bd6 10.Be2 0-0 11.h3 Nbd7 12.0-0 c5 13.bc5 Nc5 14.Qc2 Rb8 15.Na4 Qe7 16.Nc5 Bc5 17.Bd4 Ne4 18.Bd3 Rfc8 19.Bc5 Rc5 20.Qe2 Nc3 21.Qe1 e5 22.Nd2 e4 23.Be2 a5 24.Nb1? Ne2 25.Qe2 Qf6 26.Ra2 Ba6 27.Qg4 Bf1 28.Nd2 Bc4 29.Nc4 Rc4 30.g3 Qf3 31.Qf3 ef3 32.Rd2 Rc1 33.Kh2 Rbb1 34.g4 g5 35.Kg3–+ Rc3 36.Kf3 Ra3 37.Rd5 a4 38.Rg5 Kf8 39.Ra5 Rb2 40.Ra8 Kg7 41.Ra5 Raa2 42.Rg5 Kh6 43.h4 Rf2 44.Ke4 Rab2 45.Rh5 (45.Rh5 Kg7 46.Rg5 Kf8 47.Kd4–+) 0–1. iczker – delcrimar (1640), kurnik, 2011.

(--> 1.b4 e6 2.Bb2 Nf6 3.a3 a6).

4.Nf3 c5 5.c3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 c5 5.c3 a6).

4.Ra3 Bb4–/+ 5.Rg3 Bf8 6.Na3 c6 7.Qa1 d5 8.Nf3 Nbd7 9.h4 b5 10.a5? c5 11.h5 d4 12.c3 Ne4 13.Rg4 f5 14.Re4? fe4 15.Nh4 Be7 16.g3 Bh4 17.Rh4 e5 18.Re4 Bb7 19.Rg4 Qf6 20.cd4 cd4 21.e3 de3 22.de3 0-0-0 23.Bh3 Kb8 24.Rb4 Rhe8 25.Nb5 ab5 26.Rb5 Qc6 27.Bf1 Ka7 28.Be5?? Ne5 29.Re5 Re5 30.Qe5 Rd5 31.Qb2–+ Qd6 32.Be2 Ba6 33.Qg7–/+ Qd7 34.Qb2? Be2–+ 35.Qb6? Ka8 36.Ke2 Rd6 37.Qc5 Rd2–/+ 38.Kf1 Rd1 39.Kg2 Qd5 40.Qd5 Rd5 41.f4 Ra5 42.Kf3 Kb7 43.g4 Ra4 44.f5 Kc6 45.e4 Kd6 46.Kf4 Ke7 47.g5 Kf7 48.f6?? Ra5 49.e5–/+ Ra4?? 50.Kf5+/– Ra5 51.g6 hg6 52.hg6 Kg8 53.f7 Kg7 54.Ke6 Ra6 55.Ke7 Ra7 56.Ke6 Ra6 57.Ke7 Ra7 58.Ke6 Ra6 ½–½. xtom (1635) – ita1979 (1620), kurnik, 2011.

4.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.a4).

4.b5 ab5 5.ab5 Ra1 6.Ba1 c6 7.c4 cb5 8.cb5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.c4 ab5 5.cb5 c6 6.a4 cb5 7.ab5 Ra1 8.Ba1).

4.b5 ab5 5.ab5 Ra1 6.Ba1 d5 7.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1).

4.d3 Nf6 5.Nd2 d5 6.Ngf3 c6 (6...Be7 7.e4-/+) 7.e4 de4 8.de4 Be7 9.e5 Nd5 10.c4 bc4 11.Bc4 b5 12.Bd5 cd5 13.0-0 0-0 14.Qb3 b4 (14...Qa5 15.Rfc1-/+) 15.a3=+ ba3 16.Ba3 Ba3 17.Ra3 Ra3 18.Qa3 Nc6 19.Rc1 Ne7 20.Nd4 Ng6 21.Qe3 Ba6 22.N2f3 Qb6 23.h3 h6 24.Rc6 Qb1 25.Kh2 Bc4 26.Nd2 Qd1 (better 26...Qd3 27.Qd3 Bd3-/+) 27.N2b3?? (better 27.Nc4 dc4 28.Rc4=) 27...Bb3-+ 28.Nb3 Ra8 (28...Ne5!? 29.Qe5 Qb3 30.f4-+) 29.Rc1-/+ Qh5 30.Nd4? (better 30.f4!?-/+) 30...Qe5-+ 31.g3 Qe3 32.fe3 Ra2 33.Kg1 Ne5 34.Rc7 g6 35.Nb5 (35.Rc2 Rc2 36.Nc2 f5-+) 35...Nc4 (better 35...Re2 36.Rc3-+) 36.Rc5 (36.e4 Ne3 37.ed5 Rg2 38.Kh1 ed5-+) 36...Re2 (better 36...Ne3!? 37.Kh1-+) 37.Rc8 Kg7 38.Nd4 (38.e4 Re4 39.Kf2 Kf6-+) 38...Re3 39.Nc2 (39.Kf2 Rd3 40.Nb5 Rd2 41.Kf1 Rh2-+) 39...Re2 (better 39...Rg3!? 40.Kh2 Rd3 41.Nb4 Rd2 42.Kh1-+) 40.Nb4 (40.Nd4 Rd2 41.Nf3 Ra2-+) 40...Rb2 41.Nd3 (41.Nc6 Ne3 42.Kh1 Kf6-+) 41...Rd2 (41...Rb3!? 42.Nc5 Rg3 43.Kh2-+) 42.Nf2 Ne3 43.Ng4 (43.Re8 d4-+) 43…Ng4 (43...Ng4 44.hg4 Kf6-+) 0-1. Antares_Sco (1870) - grayfolk (2180), Rated Blitz game, lichess.org, 2016.

4.e3 b4 5.a4 Nf6 6.a5 (6.Nf3 d5-/+) 6...c5 (6...Nc6 7.Nf3-/+) 7.Nf3 Ra5 8.Ra5 Qa5 9.Bc4 (9.Be2 d5-/+) 9...d5-+ 10.Bb3? (better 10.Be2-+) 10...c4 11.Bc4 (11.Bf6 gf6 (11...cb3?! 12.Be5 bc2 13.Qc2-+) 12.0-0 cb3 13.cb3 e5-+) 11...dc4 12.Qe2 (12.Bf6 gf6 13.Rg1 e5-+) 12...b5 (better 12...Qa2 13.0-0 Qb2 14.Qc4-+) 13.Nd4 (13.Bf6 gf6 14.0-0 Bb7-+) 13...Bd7 (13...Qa2 14.0-0 Qb2 15.Qf3-+) 14.0-0 (14.Qd1 Be7-+) 14...Nc6 (better 14...Qa2 15.Bc3-+) 15.d3 (15.Nc6 Bc6 16.Bf6 gf6-+) 15...c3 16.Bc1 (16.Nb3 Qa6 (16...cb2?! 17.Na5 Na5 18.Qf3=+) 17.Nc3 bc3 18.Bc3 e5-+) 16...Nd4 (better 16...Qa2!? 17.Qf3 Nd8 18.Bd2 cd2 19.Qd1-+) 17.ed4 Bd6 18.Be3 (18.Qf3 Qc7 19.h3 Bc6-+) 18...0-0 (18...Qc7 19.h3-+) 19.Qf3 (19.Bg5 Nd5 20.Rc1 Qa2-+) 19...Nd5 20.Re1 (20.Rc1 Qc7-+) 20...Qa2 21.h3 (21.Qd1 b3! 22.cb3 c2-+) 21...Qc2 22.Rc1 Qd3 23.h4 (23.Rd1 c2 24.Rd3 cb1Q 25.Rd1 Qg6-+) 23...Bc6 (23...c2 24.Nd2 b3 25.Nb3 Qb3 26.Qe2 Ne3 27.Qe3-+) 24.Nc3 (24.Bg5 Qf3 25.gf3 h6-+) 24...bc3 25.Rf1 b4 (better 25...Ne3 26.Qe3 Bh2 27.Kh2 Qf1 28.d5 Bd5 29.f3-+) 26.Rd1 Ne3 27.Rd3 Bf3 28.gf3 c2 29.fe3 (29.Re3 c1Q 30.Kg2 Ra8 31.Re2 Ra1 32.Re5 Qg1 33.Kh3 Qf2 34.h5 Rh1 35.Kg4 Qh4) 29…c1Q (29...c1Q 30.Kf2 Qc2 31.Ke1 Bg3 32.Kf1 Qf2) 0-1. chessbit - dragonwelb (2340), Hourly Bullet Arena, lichess.org, 2019.

4.a3 b6 5.d4 a5 6.b5 d5 7.e3 Bd6 8.Nc3=.

4.a3 b6 5.e3 Bb7 6.Nf3 Be7 7.Be2 d6 (7...0-0 8.Nc3= (8.0-0=); 7...d5 8.d4=) 8.d4 (8.0-0=) 8...Nbd7 9.0-0 Rc8 10.a4 (10.Nc3 0-0=) 10...0-0 11.a5 (11.b5 c5=) 11...Ra8 (11...ba5 12.ba5 Rb8 13.Ra2=) 12.Nbd2 (12.Qa4 c5=) 12...c5 13.Bc3 (13.Qa4 cb4 14.Qb4 Rb8=) 13...Ne4 (13...cb4 14.Bb4 Qc7 15.Bd3=) 14.Ne4+= Be4 15.ab6 (15.Nd2 Bg6=) 15...Nb6 (15...cb4 16.b7 Bb7 17.Bb4=) 16.bc5 dc5 17.Ba5 Qd6 18.Nd2 Bb7 (better is 18...Bf5 19.dc5 Qc5+–) 19.Nb3?? (19.Qb3 Bd8 20.Rfb1 Bc7+–) 19...Qc7? (better is 19...Nd7=) 20.Rb1 (20.dc5 Bc5 21.Nc5 Qc5+–) 20...Be4 21.dc5 Bc5 22.Nc5 Bb1 23.Qb1 Qc5 24.Bb6 Qc8 25.c5 Rb8 26.Qa2 Qd7 27.Rd1 Qc6 28.Rd6 Qe8 29.Ba6 Ra8 30.Qc4 Qe7 31.g3 Qf6 32.Rd1 Qf3 33.Rd2 Qf6 34.Kg2 Qa1 35.Qa2 Qe5?? 36.Rd4+– Qf6 37.Qc4 e5 38.Rd6 Qe7 39.Qe2 e4 40.Rd4 h6 41.c6 Rfb8 42.Rd7 Qf6 43.Bb7 Rb7 44.cb7 Re8 45.Bc7 Qc6 46.Re7! Re7 47.b8Q Re8 48.Qb6 Qd7 49.Qeb2 Qf5 50.Bf4 Qg4 51.Q6d4 Re6 52.h3 Qg6 53.Qb8 Kh7 54.Qdd8 Qf5 55.Qh8 Kg6 56.Qbg8 (56.Qbg8 Qh3 57.Kh3 Re7 58.Qgg7 Kf5 59.Qf6#; 56.Qbf8 Kh5 57.Qhg7 Qh3 58.Kh3 Rg6 59.Qh6 Rh6 60.Qh6#) 1–0. Nordbrink,Juergen – Filor,E, corr, 1980.

4.a3 b6 5.Nf3 Nc6 6.Nc3 Bd6 7.e4 0-0 8.d4 Bf4.

4.a3 b6 5.Nf3 d5 6.e3 dc4 7.Bc4 b5 8.Be2=.

4.a3 c5 5.Qb3 cb4 6.ab4 Nc6 7.b5 Ne7 8.ba6 Ra6 9.Ra6 ba6 10.e3 Nf5 11.d4 d5 12.c5 Ne4 13.Bd3 Qa5 14.Nc3 Bc5? (14...Nh4!?+=) 15.dc5 (better is 15.Be4!? Qb4 16.Qc2 de4 17.dc5+–) 15...Nc5+/– 16.Qc2 Nd3 17.Qd3 Qb4 18.Qd2 d4 19.ed4 Nd4 20.Nge2 e5 21.0-0 (better is 21.Nd4!? Qd4 22.Qd4 ed4 23.Ne4+–) 21...0-0+/– 22.Nd4 ed4 23.Ne4 Qd2 24.Nd2 d3 25.Rd1 Bd7 26.Nf3 Bb5 27.Ne1 Rd8 28.f3 (better is 28.Rd2+=) 28...d2–/+ 29.Nc2?? (29.Bc3 de1Q 30.Re1 Rc8–/+) 29...Ba4 (29...Be2 30.Ne3 Bd1 31.Nd1–+) 30.Ne3?? (better is 30.Bc3–/+) 30...Bd1–+ 31.Nd1 Rc8 32.Bc3 a5?? (better is 32...Re8 33.Kf2 Re1–+) 33.Kf2+= (33.Bd2? Rd8 34.Ba5 Rd1 35.Kf2 f6–+) 33...a4 34.Ke2 (34.Bd2? a3 35.Nc3 a2 36.Na2 Rc2–+) 34...a3 35.Kd2 a2 36.Ba1 Rb8 37.Ne3 Rb1 38.Nc2 Rg1 ½–½. Kulik,Roman (1940) – Salamon,Jan (1890), Polfinal Mistrzostw Polski Niewidomych Poland, 2008.

4.a3 c5 5.bc5 Bc5 (5...Nc6 6.Nf3 Bc5 7.d4 Be7 8.Nc3 0-0) 6.d4 Be7 7.Nc3 0-0 (7...d5 8.e3= (8.cd5 ed5) 8...Nc6; 7...Nc6 8.Nf3 0-0) 8.Nf3 (8.e4 d5 9.e5 Ne8=) 8...d5 (8...Nc6=) 9.c5. algernon (2175) – pushtiu (2230), net–chess.com, 2010.

4.a3 c5 5.Nf3 cb4 6.ab4 Bb4 7.Nc3 Nc6 8.e3 0-0.

4.a3 Nc6 5.Nf3 d5 6.cd5 ed5 7.e3 Bg4 8.h3 Bf5.

4.a3 d5 5.e3= (5.cd5 ed5 6.Nf3 Nc6 7.e3 Bf5 8.Nc3 Bd6) 5...a5 6.b5 Bd6 7.Nf3 Nbd7 8.d4 0-0.

4.a3 Bd6 5.Nf3 Nc6 6.Nc3 0-0 7.e3 b6 8.Bd3 Bb7.

4.a3 Be7 5.Nf3 Nc6 6.Nc3 0-0 7.e3 d5 8.Bd3 dc4.

4.Qa4 b6 5.Nf3 Bb7 6.Nc3 Nc6 7.a3 Bd6 8.e3 0-0.

4.Qb3 c6 5.a4 Qe7 6.b5 Qb4 7.Qb4 Bb4 8.e3 ab5 9.ab5 Ra1 10.Ba1 cb5 11.cb5 Be7 12.Nf3 d5 13.d4 Bd6 14.Bd3 0-0 15.Nbd2 Bb4 16.Ke2 Bd7 17.Rc1 Rc8 18.Rc8 Bc8 19.Ne5 Bd2 20.Kd2 Nfd7 21.f4 Ne5 22.fe5 Nd7 23.e4 b6 24.ed5 ed5 25.Bb2 Nf8 26.Ke3 Be6 27.Ba3 Ng6 28.Bd6 f5? 29.ef6! gf6 30.Bc7 Nh4 31.g3 Nf5 32.Bf5 Bf5+/– 33.Bb6 Bd7 34.Bd8 Bb5 35.Bf6 Kf7 36.Bh8 Kg6 37.Kf4 h5 38.Be5 Bd3 39.Bc7 Be4 40.Bd8 Bh1 41.h3 Be4 42.g4 hg4 43.Kg4 Bg2 44.h4 Be4 45.h5 Kh7 46.Bg5 Bd3 47.Kf4 Be2 48.h6 Bf1 49.Ke5 Bg2 50.Kf6 Bh1 51.Bf4 Bg2 52.Bg5 Bh1 53.Bf4 Bg2 54.Bg5 ½–½. carocan (1700) – tomborell, kurnik, 2011.

4.Qb3 Be7 5.d4 d5 6.c5 0-0 7.Nf3 Ne4 8.Nbd2 Nc6 9.e3 f5 10.Bd3 Bf6 11.Rd1 Bd7 12.0-0 Qe8 13.Bc3 g5 14.Ne5 (better is 14.Bb2=) 14...Ne5–/+ 15.de5 Ba4 (15...Nc3?! 16.Qc3 Bg7 17.f4=) 16.Qb2 Nc3 17.Qc3 Bd1 18.Rd1 Bg7 19.f4 gf4 20.ef4 Bh6 21.Qd4 (21.Rf1!?–/+) 21...Qa4–+ 22.Rb1 a5 23.g3 ab4 24.Qb4 Qb4 25.Rb4 Rfb8 26.Rb2 Bf8 27.Nb3 Ra3 28.Kf1 Rba8 29.Bb1 R8a4 30.Ke2 Rb4 31.Rc2 Rc4 32.Rc4 dc4 33.Nd4 Kf7 34.c6 bc6 35.Nc6 (better is 35.Nf3 Bc5 36.Nd2–+) 35...Bc5 36.Nd8 (36.Kd1 Ke8–+) 36...Ke7 37.Nc6 Kd7 38.Nb8 Kc8 39.Nc6 Kd7 (39...Ra6!? 40.h3 Rc6 41.g4–+) 40.Nb8 Kc8 41.Nc6 Ra6 42.Kd2 (42.h3 Rc6 43.g4 Rb6–+) 42...Rc6 43.Kc3 Bg1 0–1. Arlt,Ronald (1725) – Denker,Stephan (2035), Bad Harzburg op, 2007.

4.c5 Nc6 5.a3 d6 6.cd6 Bd6 7.Nf3 e5 8.e3 Bg4 9.Be2 Bf3 10.Bf3 e4 11.Be2 Nd7 12.Qc2 Qh4 13.g3 Qe7 14.Nc3 Nf6 15.Bc4 Ne5 16.Be2 Qe6 17.Ne4 h6 18.Nf6 Qf6 19.f4 0-0-0 20.Be5 Be5 21.fe5 Qe5 22.0-0 g5 23.d4 Qe6 24.Qf5 h5 25.Bc4 Qf5 26.Rf5 g4 27.Raf1 h4 28.Rf7 hg3 29.hg3 Rde8 30.Re1 Rh3 31.Kg2 Rh6 32.Rg7 Reh8 33.Rg4 Rh2 34.Kf3 Kb8 35.Rg8 Rg8 36.Bg8 Rh6 37.e4 Rf6 38.Kg2 Rc6 39.Re3 Rc2 40.Kf3 Rc1 41.e5 Rf1 42.Kg2 Rd1 43.e6 Rd2 44.Kf3 Rd4 45.e7 1–0. purplegadge (1680) – rbatiste, gameknot.com, 2014.

4.c4 Bb4?? 5.Bg7 (5.cb5?! Nf6=) 5...bc4 6.Bh8+–.

4.c4 bc4 5.Bc4 Bb7 6.Nf3 d5 7.Be2 Nd7 (7...Bb4?? 8.Bg7 Nd7 9.Bh8+–) 8.0-0 c5 (8...Ngf6 9.Qa4=) 9.bc5+= Bc5?? (better 9...Nc5 10.d4 Nd7+=) 10.Bg7+– (10.Bg7 Ne7 11.Bh8+–) 1–0. aravind555 (1705) – novik2 (1710), lichess.org, 2020.

4.c4 bc4 5.Bc4 d5 6.Bb3 (6.Be2 Nf6= 7.Nf3 Nbd7 8.Qa4 c5 9.a3=; 6.Bd3 Nf6 7.Nf3 Nbd7 8.Qa4 c5 9.bc5=) 6...Bb7 (6...Nf6 7.a3= c5 8.bc5 Bc5 9.Nf3=) 7.Nf3 (7.a3 Nf6 8.Ba4 Nbd7 9.Nf3=) 7...Nf6 (7...Bb4?? 8.Bg7 Nf6 9.Bh8+–) 8.a3 (8.Ba4 c6 9.a3=) 8...Nbd7 (8...Bd6 9.Be5=) 9.d4 (9.Ba4 Bd6=) 9...Bd6 10.Nbd2 (10.Nc3 0-0=) 10...0-0 11.Rc1 Re8 12.Ne5 Ne4 (12...Qe7!?=) 13.Ne4+/– de4 14.Nd7 Qd7 15.Qg4 (15.Ba4 c6 16.Qc2+=) 15...f5?? (15...Red8 16.0-0 Bd5 17.Bd5 ed5 18.Qd7 Rd7 19.Rc6=) 16.Qd1?? (better is 16.Qf5! a5 17.b5+/–) 16...Bd5= 17.Ba4 c6 18.Qd2 Rf8 19.Qc2 Rac8 20.Qe2 Qb7 21.f3? ef3 22.gf3–/+ Bb4! 23.Kd1 Be7 24.Rg1 Bf6 25.e4 fe4 26.fe4 Bb3 27.Bb3–/+ Qb3 28.Rc2 e5 29.Rg3 Qe6 30.de5 Be5–+ 31.Be5 Qe5 32.Qc4 Kh8 33.Rcg2 Rcd8 34.Kc2 Rd4 35.Qc6 Re4 36.Qa6 Qf5 37.Qd3? Qc5 38.Kb2 Rb8 39.Ka2 Rd4 40.Qc2 Qd5 41.Rb3–/+ Rd8 42.Qc3?? Qg2–+ 43.Rb2 Qd5 (43...Qd5 44.Qb3 Qa5–+) 0–1. Vahl,Laurens – Van der Eijk,Martijn, NED–ch U16 op, 2000.

4.c4 bc4 5.Bc4 Qh4 6.Bd4= (6.Qb3 Bb7 7.Bf1 Nf6 8.a3 Bd6 9.Qc2+=) 6...Nc6 7.Nf3 Qg4 8.Be2 Qg6 9.a3=.

4.c4 bc4 5.Qf3 Nc6 (5...d5 6.Bc4 Nd7 7.a3 c5 8.Bd3 Rb8 9.Bc3+=) 6.a3 Rb8 7.Qg3 f6 8.Nf3 a5 9.Bc4+=.

4.Qf3 Nc6 5.a3 Bb7 6.Qg3 Nf6 7.Nf3 Rb8 8.Nc3 d5 9.Bd3 Nh5 10.Qg4 Nf6 11.Qh3 (11.Qg5 h6 12.Qg3 g5=) 11...h6 (11...e5 12.Ng5=) 12.Ne2 e5 (better 12...Bd6!? 13.Ng3 0-0=) 13.Ne5+/- Ne5 14.Be5 Bc8 (14...Bd6 15.Bd4+/-) 15.Qg3+- Rb7 16.Nf4 Qe7 17.Bf6 (17.Bd4 c6+/-) 17...Qf6 18.Ke2 (18.c3 c6+/-) 18...Bd6 19.Nh5 (better 19.Nd5 Qa1 20.Qd6 Bg4 21.f3 cd6 22.Ra1+=) 19...Bg3?? (better 19...Qa1! 20.Ra1 Bg3 21.Ng3 Bd7=+) 20.Nf6+- gf6 21.hg3 h5 22.Rh4 Ke7 (22...Rg8 23.a4 Ke7 24.ab5 ab5 25.e4+-) 23.Rah1 Be6 24.f3 d4 (24...f5 25.Rh5 Rh5 26.Rh5+-) 25.Rh5 (better 25.ed4 Rg8 26.Kf2+-) 25...de3?? (25...Rh5 26.Rh5 de3 27.Ke3 Ra7+-) 26.Rh8 ed2 27.Kd2 c5 (27...Rb6 28.g4+-) 28.Re1 (28.bc5 Ra7+-) 28...cb4 (28...c4 29.Be4 Rd7 30.Kc3+-) 29.ab4 Rd7 30.Re6! fe6 (30...Ke6 31.Ke3 Combination; 30...fe6 31.Rh7 Skewer) 31.Rh7 Kd6 32.Ke3 1-0. FeegLood (2655) - Ottogiugno (1630), Time forfeit, lichess.org, 2015.

4.Nf3 Ra7 5.c4 (5.Bd4 Ra8 (5...Rb7 6.a4 Nf6+= 7.ab5 ab5 8.c3 d6+=) 6.a4 ba4 7.Ra4 Nf6 8.Bd3 Nc6=; 5.a4 Nf6 (5...Nc6 6.Ne5 Nb4 7.ab5 a5 8.Bd4 Rb7+/–) 6.Bd4 Rb7 7.ab5 ab5 8.c3 d6+=; 5.a3 Nf6 6.c4 bc4 7.Bc4 d5 8.Be2 c5=; 5.Be2 Nf6 (5...Rb7 6.0-0 Nf6 7.c3 c5 8.bc5 Bc5+=; 5...Bb7 6.a4 Nc6 7.c3 ba4 8.Ra4 Nf6+=; 5...Nc6 6.a3 Bb7 7.Nc3 Nf6 8.e4 Be7+=) 6.a4 Bb4 7.ab5 Bb7 8.0-0 0-0=) 5...bc4= (5...Bb4?? 6.Bg7 (6.cb5?! Nf6=) 6...bc4 7.Bh8+–) 6.Bc4 (6.Qa4 Bb7 7.Bc4 Bc6 8.Qd1 Rb7=) 6...Rb7 7.a3 (7.Bc3= d5 8.Ba6 Na6=) 7...h5 (7...c5 8.Bc3 d5 9.Be2=) 8.0-0 (8.Qa4 c5+/–) 8...a5 (8...c5 9.Be2+=) 9.b5+/– c6 10.a4 d6 (10...d5 11.Be2+/–) 11.Nc3 (11.Qc2 Ne7+/–) 11...e5 (11...d5 12.Be2+/–) 12.d4 (12.Rb1 Nf6+/–) 12...ed4 (12...e4!? 13.Nd2 d5+=) 13.Qd4 Rh6 (13...Bg4 14.Be2+/–) 14.bc6 (better is 14.Rab1+–) 14...Rb2? (better is 14...Nc6 15.Qd5 Qd7+/–) 15.Nd5+– Rc2 (15...Nc6 16.Qb2 Nge7+–) 16.c7 (16.c7 Qc7 17.Nc7 Kd8 18.Nb5+–) 1–0. Wall,Bill – Ifanoff, internet, 2001.

4.a3 a5 5.b5 a4 6.c4 Bc5 7.d4 Bb6 8.Nc3 Ba5 9.Bd3 0-0 10.Nge2 d5 11.c5 c6 12.b6 Nbd7 13.f4 Bc3? 14.Bc3 Ne4 15.Bb2 f6 16.0-0+/– e5 17.Be4 de4 18.Ng3 ef4 19.Rf4 Rf7 20.Ne4+– Nf8 21.Nd6 Rd7 22.Qc2 Ne6 23.Rf3 Ng5 24.Rg3 Qe7 25.Re1 Rd6 26.cd6 Qd6 27.Qc5 Qe6? 28.e4!+– Bd7 29.Bc3 Re8? 30.h4?? Ne4= 31.Qb4 Qf5 32.Rf3 Qg4 33.Bb2 Qh4 34.Qa4?? Bg4 35.Rfe3 f5 36.Qb3 Kh8 37.Qf7 Qf2 38.Kh2 Qf4 39.Kg1 Rg8?? 40.Re4!+– Qe4 41.Re4 fe4 42.Qf4 Bh5 43.Qe4 Bg6 44.Qe5 h6 45.d5 Kh7 46.dc6 bc6 47.b7 (47.b7 Bc2 48.b8Q Kg6 49.Qe6 Kg5 50.Qg3 Kh5 51.Qeg4) 1–0. amator111 (1665) – frankfurti, kurnik, 2011.

4.a3 b5 5.c4 Bb7 6.Nf3 (--> 1.b4 b5 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4).

4.a3 c5 5.bc5 Bc5 6.c4 Nc6 7.Nc3 0-0 8.Nf3 b6 9.Qc2 Bb7 10.Na4 Be7 11.Rb1 Qc7 12.Nb6!+/– Qb6 13.Bf6 Qb1?? 14.Qb1+– Bf6 15.Qb7 Rab8 16.Qd7 Rb1 17.Ke2 Na5 18.Qc7 Nb3 19.d4 Nc1 20.Kd2 Na2 21.e4 Rb2 22.Ke3 Rfb8 23.c5 g5 24.Bc4 Nc3 25.c6 Nb5 26.Qb8 Kg7 27.c7 (27.c7 Nc7 28.Qb2+–) 1–0. pereira – oppo, internet, 2009.

4.a3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6).

4.a3 Be7 5.Nf3 b5 6.c4 bc4 7.Bc4 Bb7 8.0-0+= 0-0 9.d3 d6 10.Nbd2 Nbd7 11.Bb3 c5 12.Rb1 cb4 13.ab4 d5 14.Ba2 Bc6 15.Ne5 Ne5 16.Be5 Bb5 17.Nf3 Nd7 18.Re1 Ne5–/+ 19.Ne5 Qc7 20.d4=+ Bd6 21.Nf3 Qe7 22.Qd2 Rac8 23.Rb2 Rc7–/+ 24.Reb1 Rfc8 25.g3 h6 26.Ne1 Rc3 27.Rb3 R3c7 28.Nd3?? Rc2–+ 29.Rc1 Rd2 30.Rc8 Kh7 31.Nb2 Bb4 32.Kg2 a5 33.Bb1 f5 34.g4 Qg5 35.h3 Qh4 36.Nd3 Bd3 37.Rd3 Qf2 (37...Qf2 38.Kh1 Qf1#) 0–1. Dreyer – Fauth,D, Frankfurt a Main GER, 1987.

4.a3 d5 5.e5 Nge7 6.d4 Ng6 7.Nf3 Be7 8.g3 (8.Bc1 Nb8+=) 8...b6 (8...Bd7 9.h4=) 9.Bg2 (9.h4 0-0+=) 9...Bb7 (9...a5 10.b5 Na7 11.a4=) 10.0-0 Na7 11.Nbd2 c5 12.bc5 bc5 13.c4 0-0 14.dc5 Bc5 15.Nb3 Be7 16.cd5 Bd5 17.Rb1 (better 17.Nbd4!?=) 17...Rb8–/+ 18.Nfd4?? (better 18.Nbd2–/+) 18...Bb3–+ 19.Nb3 Qd1 20.Rbd1 (20.Rfd1 Rb3 21.Ba1 Ra3–+) 20...Rb3 21.Rd7 (21.Ba1 Ba3 22.Rd7 Nb5–+) 21...Rb2 (21...Ba3?! 22.Ba3 Ra3 23.Ra7 Ne5 24.f4–+) 22.f4 (22.Ra7 Ba3 23.Ra6–+) 22...Rd8 (22...Rc8 23.Rfd1 Ba3 24.R1d2–+) 23.Rd8 Bd8 24.Rd1 (24.h4 Nb5–+) 24...Be7 25.h4 (25.a4 Bc5 26.Kh1 Ra2–+) 25...h6 (25...Ba3 26.Kh2–+) 26.Rd3 (26.h5 Nf8–+) 26...Bh4! 27.gh4 (27.Kf1 Rb1 28.Ke2 Bg3 29.Rg3 Nf4 30.Kf3 g5–+) 27…Rg2! (27...Rg2 28.Kf1 Rg4 29.Rd8 Kh7–+) 0–1. Sapareva,Magdalena (1620) – Dochev,Delyan (1785), 124th MGU Open, 2014.

4.a3 Qh4 5.Nc3 (5.d3 Nf6=) 5...b5 (5...Nf6!? 6.Nf3 Qf4+=) 6.Nf3 Qd8 (6...Qg4 7.d4+=) 7.d4+/– Nce7 (7...d5 8.Bd3+/–) 8.Bd3 d6 (8...Ng6 9.0-0+/–) 9.0-0+– Bb7 (9...Ng6+–) 10.Ng5 (10.d5 Nf6+–) 10...h6 (10...Nc6 11.f4 Nd4 12.a4+/–) 11.Nh3 Bc8 (11...d5 12.Qe2+/–) 12.f4 (12.a4 ba4 13.Ra4 Rb8+–) 12...g6 (12...Nf6 13.Nf2+–) 13.e5 (13.a4 ba4 14.Na4 Bg7+–) 13...d5 14.a4 Bb7 (14...Nf5!? 15.Qd2 Bb4 16.ab5 c6+/–) 15.ab5+– ab5 16.Ra8 Ba8 (16...Qa8 17.Nb5 (worse is 17.Bb5 c6+–) 17...Qd8 18.Nf2+–) 17.Nb5 Nf5 (17...Bb7 18.Qd2+–) 18.Bf5 (18.Qa1!? Bb7 19.Qa7 Qc8+–) 18...gf5 19.c4! c6 (19...dc4 20.Qa4) 20.Na3+– Bb4 (20...Bb7+–) 21.cd5 cd5? (21...Ba3 22.Ba3 Qd5+–) 22.Qa4 Kf8 23.Qb4 (23.Qb4 Kg7 24.Nb5+–) 1–0. Wall,Bill – Luv2Play, internet, 2006.

4.a3 Bb7 5.e3 Nf6 6.Be2 c5 7.bc5 Bc5 8.0-0 Qc7 9.d3 Rg8 (9...0-0 10.Bf6 gf6 11.a4=) 10.d4 Ba7 (10...Bd6 11.Ne5=) 11.Nbd2+= Nc6 12.c4 bc4 13.Bc4 Na5 (13...Rb8 14.Rb1+=) 14.Ba2 (14.Bd3 Rc8+/–) 14...Bb8 15.Rc1 Qd6 16.Qa4 Nc6 17.Qd1 (17.e4 Qf4+/–) 17...Ng4 (17...Na5!?= The pressure on h2 grows) 18.h3 Nf6 (18...Nh2 19.Re1 Nf3 20.Nf3+= (20.Qf3 Nd4 21.Rc8 Ke7 22.Re8 Re8–+)) 19.Qe2 (19.e4 Qf4 20.e5 Nh5+/–) 19...Nd5 (19...g5 20.e4 g4 21.e5 gf3 22.Nf3= (22.ed6?? Rg2 23.Kh1 fe2–+)) 20.Nc4 (20.Ne4 Qe7+/–) 20...Qc7 (20...Qe7 21.Qd3+=) 21.Qd3 (21.Nce5 Qd6+/–) 21...g6 (21...f5 22.Nce5 Qd6 23.Rc2+/–) 22.Ng5?? (better is 22.Nce5+/–) 22…Qh2# 0–1. FatMaHa – kingsknight59, ChessWorld.net, 2005.

4.e3 Bb7 (--> 1.b4 b5 2.Bb2 Bb7 3.e3 a6 4.Nf3 e6).

4.e3 Nf6 5.a4 ba4 6.Ra4 c6 7.c4 d6 8.d4 Bd7 9.Nc3 c5 10.b5 Qb6 11.dc5 dc5 12.Bd3 Ra7 13.Qa1 Bd6 14.0-0 0-0 15.Ra3 Bc7? (better is 15...Bc8+/–) 16.Na4+– Qd6 17.b6 Bb6 18.Nb6 Qb6 19.Bf6 gf6 20.Qf6 Qd8 (20...Rd8 21.Bh7 Kf8 22.Rd1+–) 21.Bh7! Kh7 (21...Kh7 22.Ng5 Combination) 22.Ng5 Kg8 23.Qh6 Qg5 24.Qg5 Kh8 25.e4 f6 (25...e5 26.Qh6 Kg8 27.Rg3 Bg4 28.Rg4#) 26.Rh3# 1–0. Fournier,Frederic (2445) – Bullofthewest, Chessworld.net, 2012.

4.a3 d5 5.g3 Nf6 6.Bg2 Bd6 7.d3 b5 8.Nbd2 Bb7 9.0-0 0-0 10.Re1 Re8 11.e4 e5 (better is 11...de4!? 12.de4 e5=) 12.ed5+/– Nd5 13.c4 Nf6 14.c5 Bf8 (14...Be7!?+/–) 15.Ne5 Ne5 16.Bb7 (worse is 16.Re5 Bg2 17.Kg2 Qd3+=) 16...Nd3 (16...Ra7 17.Bg2 Nd3 18.Re8 Qe8 19.Bf6 gf6 20.Ne4+–) 17.Re8+– Ne8 18.Ba8 Nb2 19.Qc2 Qa8 20.Qb2 Qd5 21.Nf1 Nf6 22.Qd2 Qe5 23.Re1 Ne4?? (23...Qf5+–) 24.Qe3 1–0. Beltyukov,Denis – Nikolaev,Peter, Samara op, 2008.

4.a3 Nge7 5.e3 Ng6 6.c4 Nce7 7.Be2 Nf5 8.0-0 d6 9.d3 e5 10.Nbd2 Nfh4 11.Nh4 Nh4 12.Nf3 Nf3 13.Bf3 Be7 14.d4 Bf6 15.de5 Be5 16.Be5 de5 17.Qd8 Kd8 18.Rfd1 Ke7 19.c5 c6 20.Rd6 f5 21.Rad1 e4 22.Be2 Be6 23.f3 Bd5 24.fe4 fe4 25.Bg4 Rhd8 26.Rd8 Rd8 (worse is 26...Kd8 27.Be6 Kc7 28.Bd5 cd5 29.Rd5+/–) 27.g3 g6 28.h4 h5 29.Be2 Rf8 30.Rf1 Rf5? (better is 30...Rf1!? 31.Kf1 Be6=) 31.Rf5+/– gf5 32.Bh5 Kf6 33.Be2 Kg7 (better is 33...Be6+–) 34.Bh5 Kh6?? (34...Kf6 35.g4 Ke5+–) 35.Be8 Be6 36.Kf2 Kg7 37.h5 Kf8 38.Bg6 Ke7 39.Ke2 Kd8?? 40.Kd2 Kc7?? 41.Kc3 b6 42.Kd4 bc5 43.Kc5 Bd5 44.Bf5 Kd8 45.h6 Ke7 46.g4 Kf6 47.h7 Kg7 48.g5 Bf7 49.g6 Be8 50.Be4 Bd7 51.Bc6 Bf5 52.Kb6 Bg6 53.Ka6 Bh7 54.Kb6 Bc2 55.a4 Kf6 56.a5 Ke5 57.a6 Kd6 58.b5 Bd3 59.a7 Ke5 60.a8Q Ke6 61.Qe8 Kf6 62.e4 Be4 63.Be4 Kg5 64.Qf8 Kg4 65.Qf3 Kg5 66.Qf5 Kh6 67.Kc6 Kg7 68.Bd5 Kh6 69.Kd6 Kg7 70.Ke7 Kh6 71.Bf3 Kg7 72.Qg5 Kh7 73.Kf7 Kh8 74.Qh6 (74.Qh4) 1–0. Fournier,Frederic (1775) – wantmoe (1655), Active (5/0), 2005.

4.a3 Nf6 5.e3 d6 6.Be2 Bd7 7.0-0 e5 8.d3 h5 (8...Be7 9.c4=) 9.c4+= Ng4 (9...Be7 10.d4 ed4 11.Nd4 Nd4 12.Bd4+=) 10.Nbd2 h4 (10...Qf6 11.d4 Qg6 12.Qb1+–) 11.h3 Nh6 (11...Nf6+–) 12.Ne4 (better 12.d4+–) 12...Bh3?? (better 12...f5 13.Nc3 g5+=) 13.gh3+– Qd7 14.Nfg5?? (better 14.Kg2+–) 14...f6+– 15.Bh5 Kd8 16.Nf7 (better 16.f4+–) 16...Nf7= 17.Bg4?? (better 17.f4=) 17...f5–+ Black gets strong initiative 18.Bf5 (18.f3 Nh6–+) 18...Qf5 19.Kh2 Ng5 20.Ng5 Qg5 21.Rg1 Qf5 22.e4 (22.Qe2 Rh7–+) 22...Qf4 (22...Qf2 23.Rg2 Qf4 24.Kg1 Qe3 25.Kh2–+) 23.Kh1 (23.Kg2 Be7–+) 23...Qf6 (23...Qf2 24.Rb1–+) 24.Bc1 (24.Rg2 Be7–+) 24...Qe6 (24...Qf2 25.Qf1 Qf1 26.Rf1–+) 25.Rg4 (25.Qg4 Qg4 26.Rg4 Nd4–+) 25...Be7 26.Kh2 Nd4 27.Bg5 (27.Rg7 Rf8 28.Be3 Nf3 29.Kg2 Qf6–+) 27...Rf8 (27...Bg5!? 28.Rg5 Rf8 29.Rg7 Rf2 30.Kg1–+) 28.Be7 (28.Be3 Nf3 29.Kg2 Qf7–+) 28...Ke7 (28...Qe7 29.Ra2–+) 29.Kg1 (29.Rg7 Kd8 30.Qg4 Qg4 31.hg4 a5–+) 29...Nf3 30.Kf1 (30.Kg2–+) 30...Nh2 31.Ke1 (31.Kg2 Ng4 32.Qg4 Qg4 33.hg4 Rf4–+) 31...Ng4 32.hg4 (32.Qg4 Qg4 33.hg4 Rf3–+) 32...Rf4 33.f3 (33.Ra2 Qg4 34.Qg4 Rg4–+) 33...Raf8 34.Kf2 (34.Kd2 Rf3 35.Qe1 Qg4–+) 34...Rf3 (better 34...Qg4! 35.Ke1 Rf3 36.Kd2 Qg2 37.Kc3–+) 35.Qf3 Rf3 36.Kf3 Qf6 37.Kg2 (37.Ke2 Qf4 38.b5 Qg4 39.Kd2 h3–+) 37...Qf4 38.Kh3 (38.c5–+) 38...Qg4 (38...Qg3) 39.Kg4+– g5 (39...Kf6 40.Kh4 Kg6 41.Rf1+–) 40.Kg5 h3 41.Rh1 Kd7 42.Rh3 Kc6 43.Rh7 b6 44.Kf6 Kb7 45.Ke6 Kc6 (45...b5 46.Kd7 bc4 47.dc4+–) 46.Ke7 Kb7 47.Kd8 Kc6 48.Rc7 1–0. aravind555 – elmaurox, lichess.org, 2017.

4.a3 b5 5.e3 d5 6.a4 c6 (6...Bb4 7.ab5 0-0 (7...Bd6 8.Be5 0-0 9.d4 Be5 10.Ne5 Ne4=; 7...Bb7 8.ba6 Na6 9.Bf6 gf6 10.Nd4 Qc8+=; 7...c6 8.Be5 Bd6 9.d4 0-0 10.Nbd2 cb5=) 8.Be2= c6 9.bc6 Nc6 10.0-0 Qe7=; 6...ba4 7.Ra4 c5 (7...Nbd7 8.b5 Nb6 9.Ra2 a5 10.Be2 a4=; 7...Bd7 8.b5 c5 9.Be5 Be7 10.Nc3 0-0=) 8.bc5 Bc5 9.Be5 Nc6 10.d4 Be7=) 7.ab5 (7.c3= Bd7 (7...Bb7 8.d4 Bd6 9.Bd3 Nbd7 10.0-0 Nb6=; 7...Qb6 8.Be2 ba4 9.Qa4 Bd6 10.d4 0-0=; 7...ba4 8.Qa4 Bd6 9.c4 dc4 10.Na3 0-0+=) 8.ab5 cb5 9.Be2 Bd6 10.0-0 0-0=; 7.Be5 Bb4 8.ab5 cb5 9.Bb5 Bd7 10.Be2 a5=; 7.Bc3 ba4 8.Ra4 c5 9.bc5 Bc5 10.Be5 Nc6=; 7.Ne5 Bb4 8.ab5 Qb6 9.Nc3 Bc3 10.Bc3 cb5=) 7...cb5 (7...Bb4!? 8.Be5 cb5 (8...Bd6= 9.d4 0-0 10.Nbd2 cb5=) 9.Bb5 Bd7 10.Be2 a5=) 8.Bb5+= Bd7 9.Bd7 Qd7 (9...Nbd7!? 10.c3 Bd6+=) 10.Bf6+/– gf6 11.c3 Bg7 (11...Nc6 12.0-0+/–) 12.0-0 0-0 (12...Rg8 13.Nd4+/–) 13.Qe2 Nc6 (13...f5 14.Ng5+–) 14.Ra6 Qb7 15.Ra8 Ra8 16.b5 (16.e4 Ne7 17.Re1 f5 18.ed5 Nd5+–) 16...Na5 (16...Na7 17.Nd4+–) 17.Nd4 Nc4 (17...f5 18.Na3+–) 18.d3 Nd6 19.c4 Qc7 (19...f5 20.Rc1+–) 20.cd5 Ra5 (20...ed5 21.Qh5 Qc5 22.Nd2+–) 21.Qd2 (better is 21.de6 fe6 22.Ne6+–) 21...Nb5 (21...f5+–) 22.Rc1 (22.de6?! Nd4 23.ef7 Kf7 24.ed4 f5+–) 22...Qb6 (22...Qc1 23.Qc1 Nd4 24.ed4 Rd5 25.Qc8 Bf8+–) 23.Rc8 Bf8 24.Qb4 (24.Qb4 Qd6 25.Qa5 Nd4 26.ed4+–) 1–0. gtate (2655) – bigal (2160), net–chess.com, 2007.

4.a3 b5 5.e3 d6=.

4.a3 b5 5.g3 Bb7 6.Bg2 Be7 (6...c5 7.d3=) 7.0-0 d6 8.d3 Nbd7 (8...0-0 9.c4=) 9.e4 (9.a4 Qc8+=) 9...e5 (9...0-0 10.Qc1=) 10.Nbd2 (10.a4 c5=) 10...0-0 11.Nb3 Bc8 12.Qe2 (12.d4 c5 13.bc5 Qc7+/–) 12...Re8 (12...Nb6 13.d4 Na4 14.de5 Nb2 15.ef6 Bf6 16.e5 de5 17.Ne5+/–) 13.c4 (13.a4 c6+=) 13...c6 (13...Nb6 14.c5 Na4 15.Rac1+=) 14.Rac1 Nf8 (14...bc4 15.dc4 Bf8 16.Qd3+=) 15.cb5 cb5 16.d4 (16.Na5 Ng6+/–) 16...Be6 (16...ed4 17.Rfd1+/–) 17.d5 (17.Na5!? ed4 18.Nd4+– (18.Bd4?! Rc8+=)) 17...Bd7 18.Na5 Qb6 19.Rc2 Rac8 20.Rfc1 Rc2 21.Rc2 Ng6 22.Bc1 Rc8 23.Rc8 Bc8 24.Qc2 Bd7 25.Be3 Qb8 26.h3 Qc8 27.Qc8 Bc8 A minor pieces endgame occured 28.Nd2 Nh5 29.Bb6 Kf8 30.Bf3 Nf6 31.Kg2 h6 32.Bc7 Ne8 33.Bb6 Bg5 34.Nb1 Bc1 35.Bg4 Ne7 36.Bc8 Nc8 ½–½. Salazar Bernard,JI – Rodriguez Bernardo,G, Orense op 9th, 2000. (=1.Nf3 Nf6 2.b4 a6 3.Bb2 e6)

4.a3 b6 5.c4 Bb7 6.e3 c5 7.bc5 bc5 (7...Bc5 8.d4 (8.Nc3 Be7 9.Rb1 d6 10.d4 Qc7 11.Bd3 0-0) 8...Be7 (8...Bf8 9.Nbd2 Be7 10.Bd3 d5 11.cd5 Nd5; 8...Bd6 9.Bd3 Qc7 10.Nc3 0-0 11.e4 Be7) 9.Bd3 0-0 10.0-0 d5 11.cd5 Qd5) 8.g3 (8.Be2 Nc6= (8...d5 9.cd5 ed5 10.0-0 Bd6 11.Nc3 0-0; 8...Be7 9.d3 0-0 10.0-0 Nc6 11.Nbd2 Rb8; 8...Bd6 9.0-0 0-0 10.d4 Bf3 11.Bf3 Nc6) 9.Nc3 Rb8 10.Rb1 Be7 11.0-0 0-0; 8.Nc3 d5 9.cd5 ed5 10.Rb1 Bd6 11.Be2 0-0; 8.Bd3 d5 (8...Be7 9.Nc3 Nc6 10.0-0 Rb8 11.Rb1 0-0; 8...Nc6 9.0-0 Be7 10.Nc3 Rb8 11.Qc2 0-0; 8...d6 9.0-0 Be7 10.Nc3 0-0 11.Rb1 Nc6) 9.cd5 ed5 10.0-0 Bd6 11.Qa4 Nbd7) 8...d6 (8...Nc6 9.Bg2= Be7 10.0-0 Rb8 11.d3 0-0; 8...d5 9.cd5 ed5 10.Bg2 Bd6 11.0-0 0-0; 8...Be7 9.Bg2 d5 10.cd5 ed5 11.0-0 0-0) 9.Bg2 Be7 10.Nc3 (10.d3 Nbd7 11.Nbd2 Rb8) 10...0-0 (10...Nbd7 11.0-0 Rb8) 11.0-0 Qc7 (11...Nc6=) 12.d3 Nc6 13.Qc2 Nd7 14.Rab1 Nce5 (14...Rfb8 15.Ne4=) 15.Ne5 Bg2 (15...Ne5 16.Bb7 Qb7 17.Ne4=) 16.Kg2 (16.Nd7!? Bf1 17.Nf8+/–) 16...Ne5= 17.f3 (17.f4 Qc6 18.Kh3 Nd7=) 17...f5 18.Ne2 Bf6 19.Nf4 Qf7 20.Ne2 g5 (20...Rab8 21.Be5 Be5 22.d4 cd4 23.ed4=) 21.d4 Ng6 (21...cd4 22.ed4 (worse is 22.Nd4 Rac8–/+) 22...Nc6 23.Rfe1=) 22.f4 (22.dc5 dc5 23.Bf6 Qf6=) 22...Qb7 (22...Rab8 23.fg5 Bg5 24.Qd3=) 23.d5+= Qf7 (23...Bb2 24.Rb2 Qe7 25.Qd2+=) 24.fg5 (24.de6 Qe6 25.Bf6 Qf6+/–) 24...Bb2 25.Rb2 ed5 26.cd5 (26.Rd1!?=) 26...Qd5+= 27.Kg1 Qe5 (27...Ne5 28.Nf4 Qe4 29.Qe2=) 28.Qd2 (28.Rb3 Qe6=) 28...Rad8 (28...Rfe8 29.Rb3=) 29.Kf2 (29.Nf4 Rb8 30.Rb8 Rb8=) 29...d5 30.Qc3 d4 31.ed4 cd4 32.Qd3 f4 33.gf4 Nf4 34.Nf4 Rf4 35.Kg2 Qg5 36.Qg3?? Rg4–+ 37.Rf3 Rf8 38.Rbb3?? Rff4 39.h3? Rf3–+ 40.Rf3?? Rg3 41.Rg3 Qg3 42.Kg3 Kf7 43.Kf3 Kf6 44.Ke4 ½–½. Satka,Martin – Mueller,Guenter(31Ludw), 9sen.Brandenburg op, 2000.

4.a3 d5 5.e3=.

4.a3 d6 5.Nc3 b5 (5...d5 6.Rb1=) 6.e4 Bb7 7.d3 c5 8.bc5 (8.Be2 d5 9.e5 Nh5=) 8...dc5 9.Be2 Nc6 10.0-0 (10.e5 Nd7=) 10...Qc7 11.Re1 Rd8 12.Qc1 (12.Qb1 Bd6+=) 12...Be7 (12...Nd4 13.Bd1+=) 13.a4 (13.Rb1 0-0+=) 13...b4 14.Nd1 a5 (14...Nd4 15.Ne3+=) 15.Ne3 0-0 16.Nc4 h6 (16...Nd4 17.Nd4 cd4 18.Qg5+=) 17.h3 (17.Nfe5 Nd4=) 17...Ba6 18.Nfe5 Bc4 19.Nc4 Nd4 20.Qd2 (20.Qd1 Bd6=) 20...Nc6 (20...Bd6 21.Rab1+=) 21.e5 (21.Qe3 Rfe8=) 21...Nd7 (21...Nd5 22.Bf3=) 22.Qf4 (22.Qe3 Nb6=) 22...Bg5 (22...Nb6 23.Nb6 Qb6 24.Qg3=) 23.Qe4 Be7 (23...Nb6 24.Nb6 Qb6 25.f4+=) 24.Bf3+= Ncb8? (better is 24...Ndb8+=) 25.Qa8 (25.Qb7 Qb7 26.Bb7 h5+–) 25...f6 (25...Nb6 26.Qa5 N8d7 27.Qb5+–) 26.ef6 Bf6 27.Bf6 Nf6 28.Qa5 Qa5 29.Na5 Rde8 30.Nb7 Nfd7 31.a5 e5? 32.a6 Nb6 33.a7 N8d7 34.Ra5 c4 35.Nd6 Re6 36.Nc4 Nc4 37.a8Q Ra8 38.Ra8 Kh7 39.dc4 (39.dc4 Rd6 40.Be4 g6 41.Ra7+–) 1–0. Wall,Bill – Wang,Willy, internet, 2003.

4.a3 Bd6 5.Nc3 (5.e4 Ne4 6.Bg7 Rg8=) 5...0-0 (5...Nc6 6.e4+=) 6.d4 a5 7.b5 c6 (7...Be7 8.e4+=) 8.e4 Bf4 (8...Be7 9.e5 Nd5 10.Ne4+=) 9.Bd3 (9.e5 Nd5+=) 9...d5 (9...d6 10.Ne2 Bh6 11.e5 de5 12.de5+=) 10.e5 Ng4? (better is 10...Nfd7+=) 11.g3+– Bg5? (11...Bh6+–) 12.Ng5 Qg5 13.f4 Qh5 14.h3 f5 15.Kd2 Nf6 16.ef6 Qd1 17.Rad1 Rf6 18.g4 cb5 19.Nb5 fg4 20.hg4 Rf4 21.Bh7 Kf8 22.a4 Nc6 23.Ba3 Nb4 24.c3 Rf2 25.Ke3 Rg2 26.Rdf1 Ke7 27.Bg6 Rg3 28.Kf4 Rg2 29.Kg5 Kd7 30.cb4 Kc6 31.ba5 Ra5 32.Rc1 Rc2 33.Rc2 Kd7 34.Rc7 Kd8 35.Be7# (35.Rh8#) 1–0. wiking – SAND0KAN, internet, 2010.

4.a3 Be7 5.e3 0-0 6.Be2 b6 7.0-0 Bb7 8.c4 c5 9.Qb3 (9.bc5 bc5 10.Qc2 d6=) 9...Qc7 (9...Nc6 10.bc5 bc5 11.Qc2= (worse is 11.Qb7 Na5 12.Qa8 Qa8–+)) 10.d4 (10.d3 Nc6=) 10...cd4 (10...cb4 11.ab4 Nc6 12.Bc3=) 11.Nd4 d6 (11...Nc6 12.Nd2=) 12.Nd2 Nbd7 (12...Nc6 13.f4=) 13.Rac1 Rfe8 (13...Rac8 14.f4=) 14.N2f3 (14.Bf3 Rac8=) 14...Rac8 (14...Ne4 15.Qc2=) 15.Rfd1 Qb8 (15...Bf8 16.Nd2=) 16.a4 (16.Ng5 h6 17.Ngf3 Red8=) 16...d5 (16...a5 17.Nb5=) 17.cd5 (17.Ba1 dc4 18.Rc4 Bd5 19.Rc8 Rc8=) 17...Bd5 18.Bc4?? (18.Qa3 a5 19.Bc3 Red8=) 18...Bc4?? (better is 18...Rc4 19.Rc4 b5 20.Nb5 ab5 21.ab5 Qb5 22.Rd5 ed5–+ (22...Nd5?! 23.Nd4 Qb6 24.Nc6–+)) 19.Rc4= Ng4?? 20.Nc6+– Qb7?? 21.Rdc1 b5?? 22.Ne7 (22.Ne7 Re7 23.Rc8 Nf8 24.Qd3+–) 1–0. StephenHilton – kostovist, internet, 2006.

4.a3 h6 5.d3 Nc6 6.e4 d6 7.Be2 Be7 8.0-0 b5 9.c4 bc4 10.dc4 Bb7 11.Nbd2 0-0 12.Qc2 Rc8 13.Rfd1 Nh5 14.g3 Bf6 15.Bf6 Nf6 16.Nb3 Qe7 17.Rac1 Ne5 18.Ne5 de5 19.f3 Rfd8 20.c5 Rd1 21.Rd1 Rd8 22.Kf2 Rd1 23.Qd1 g5 24.h3 Kg7 25.Ke3 a5? 26.Bc4 ab4+= 27.ab4 Qe8 28.Na5 Ba8 29.b5 h5? 30.c6 Qe7+/– 31.Qb3 Qc5 32.Ke2 g4 33.hg4 hg4 34.Qe3 Qb4 35.Qd2?? gf3–+ 36.Kf3?? Qa3 37.Ke2?? Ne4–+ 38.Qe3 Nc3 39.Kf3?? Qa5?? 40.Qg5= Kf8 41.Qe5?? Nd5! 42.Bd5 ed5 43.Qd5 Qc3–/+ 44.Kf2 Qf6 45.Kg2 Qb2 46.Kh3 Qh8 47.Kg4 Qg7 48.Kf3 Qf6 49.Kg2 Qb2 50.Kf3 Qc2 51.Kg4 Qg6 52.Kf3 Kg7 53.Kg2 Qc2 54.Kh3 Qh7 55.Kg2 Qc2 56.Kh3 Qh7 57.Kg2 Qc2 ½–½. bratek55 – cioculet, kurnik, 2011.

4.h3 Bb4–/+ 5.Bf6 Qf6 6.c3 Be7 7.e4 e5 8.h4 (8.d4 ed4 9.e5 Qe6 10.cd4 d5–/+) 8...h6 9.Qa4 (9.d3 d6–+) 9...0-0 10.Na3 (10.d4 ed4 11.Qd4 Re8–+) 10...Qc6 (better is 10...Qf4–+) 11.Qc2?? (11.Qc6 Nc6 12.Nc2 b6–/+) 11...d6 (better is 11...Ba3!? 12.Ne5 Qe6 13.Nc4–+) 12.c4 (12.Nc4 Re8–/+) 12...Bg4 (12...f5 13.Bd3–+) 13.Be2 (13.Nb1 Qd7–+) 13...Bf3 (13...f5!? 14.ef5 Bf5 15.Qb3–+) 14.Bf3 Nd7 15.Nb1 Nb6 16.Na3 Qa4 17.Qc3 Qd7 18.h5 f5 19.0-0-0? Rab8 20.ef5–/+ Rf5 21.Bg4+= Na4 22.Qd3 Rbf8= 23.Bf5 Rf5 24.f3 Nc5 25.Qc2 Rf4 26.Nb1 Qe6 27.Na3 b5 28.d3 Rd4 29.cb5 ab5 30.Nb5 Bg5 31.Kb1 Rb4 32.Ka1 Rb5 33.g4 Be3 34.Rb1 Rb1 35.Rb1 Bd4 36.Rb2 Qe7 37.Kb1 Bb2 38.Qb2 Qf6 39.Qb8 Kh7 40.Qc7 Nd3 41.a4 Qf3 42.Qc2 Qb7 43.Ka1 e4 44.a5 Qb5 45.Qa2 0–1. pinecrest1981 – tfjv, Live Game Caissa's Web, 2004.

5.c3 c4 6.e3 (6.d3 cd3 7.ed3 d5=) 6...b5 (6...d5 7.d3 cd3 8.Bd3=) 7.a4 Bb7 8.ab5 (8.Na3 Qb6=) 8...ab5 9.Na3 Bc6 10.Ne5 Qb6 11.Nc6 Nc6 (better is 11...Qc6 12.d3 d5=) 12.Nc4+/– Ra1 13.Nb6 Rd1 14.Kd1 Ne4 (14...Na7 15.Be2 Kd8 16.Na8+=) 15.Ke1 Nd6 16.d4 (16.Na8 Kd8 17.d4 Kc8+=) 16...Be7 (16...Kd8 17.d5 Nb8 18.c4 bc4 19.Nc4 Nc4 20.Bc4 Bb4 21.Ke2+/–) 17.e4! f6 (17...Ne4 18.Bd3 Double attack (18.Bb5 Deflection; 18.Bd3 Decoy)) 18.d5 (18.Na8 Kd8 19.f4 Kc8+/–) 18...Nb8 (18...Bd8!?+/–) 19.f3 (19.Bd3 Bd8 20.Na8 Kf7+–) 19...0-0 (19...Bd8 20.Na8+–) 20.de6 (20.Bc1 Bd8 21.Na8 Na6+–) 20...de6+/– 21.g3 (21.Bc1!?+/–) 21...Bd8+= 22.Na8 Nc4? (better is 22...Rf7 23.Bh3 f5 24.ef5 Ra7 25.fe6 Ra8=) 23.Bc4+– bc4 24.Ke2 Rf7 (24...Nc6 25.Rd1 Ba5 26.Rd6 (26.ba5?! Ra8 27.Ke3 Ra5=) 26...Ra8 27.Rc6 (27.ba5?! Na5 28.Re6 Nb3=) 27...Bb4 28.Rc4+/–) 25.Rd1 Nc6 1–0. Bonetti,Shane – guest1597, ICC, 2002.

5.c3 Nc6 6.g3 d5 7.Bg2 c4 8.0-0 Be7 9.a4 0-0 10.d3 Qc7 11.Nbd2 Na7 12.dc4 dc4 13.Qc2 Bd7 14.a5 Rac8 15.Rfd1 Bb4 (better is 15...Nb5=) 16.Nc4?? (better is 16.cb4 c3 17.Qc3 Qc3 18.Bc3 Rc3 19.Ne4+/–) 16...Bc3?? (better is 16...Qc4 17.Ne5 Qc7 18.Nd7 Nd7+=) 17.Qc3+– (17.Bc3?! Qc4 18.Ne5 Qc3 19.Qc3 Rc3 20.Nd7 Nd7 21.Rd7 Nc6 22.Rb7 Rc5=) 17...Qc4 18.Qe3 Ng4 19.Qa7 Qe2 20.Qd4 f6 21.Qg4 Qb2 22.Rab1 f5 23.Qf4 Qa2 24.Ra1 Qb2 25.Qd6 Rfd8 26.Ne5 Rc2 27.Qe6!! (27.Qe6 Kh8 28.Nf7 Kg8 29.Nh6 Kh8 30.Qg8 Rg8 31.Nf7) 1–0. Wuersig,Mathias – Schoenemann,Manfred (1805), Berlin Lichtenberger op 7th, 2008.

6.c4 Qb6 7.Qc2 Bf2 8.Kd1 Bc5 9.Bf6 gf6 10.Nc3 Nc6 11.Ne4 Ke7 (11...Be7 12.Qc3+=) 12.Rb1 (12.e3!? Qa5 13.Qb2+=) 12...Qa5= 13.Qb2 e5 Exerts pressure on the isolated pawn 14.Qb3 (better is 14.Nc5!? Qc5 15.e4+=) 14...Qa3–/+ (14...Ba3 15.Ra1 Qb4 16.Ra3 Qb3 17.Rb3+/–) 15.Nc5 Qc5 16.e3 e4 17.Ne1 Ne5 18.Be2 Rd8 19.Nc2 d5 20.cd5 Qd5 21.Qa3 (21.Qb4 Qd6–+) 21...Qd6 22.Qc3 b5 23.Nd4 Be6 24.Ke1 Rac8 25.Qa5 Nc6 26.Qa6 Nd4 27.Qd6 Rd6 28.ed4 Bc4 (28...Rd4!? 29.Bb5 Rc2 30.Kf2–+) 29.Bc4 Rc4 30.Ke2 b4 31.Rb2 Rcd4 32.Ra1 f5 33.Ra5 f4 (33...Rg6 34.Kf1–+) 34.Rb5 f3! 35.gf3 ef3 36.Kf3 Rd2 37.R2b4 (better is 37.R5b4!? Rb2 38.Rb2–/+) 37...Rh2–+ 38.Rb7 Kf8 (better is 38...Rd7!?–+) 39.Rf4–/+ f6 40.Kg3 Rh5 41.Ra4 Re6 42.Raa7 Rg5 43.Kf4 h6 (better is 43...h5!?–/+) 44.Rh7= Rg8 ½–½. Morgenstern,Frank – Vonhoff,Joerg, Blankenburger op–B, 2007.

6.d4 Be7 7.Nbd2 d5 8.e3 0-0 9.Bd3 Nc6 10.0-0 b5 11.e4 de4 12.Ne4 Nd5 13.c4 bc4 14.Bc4 Rb8 15.Rb1 Qc7 16.Bd5 ed5 17.Ng3 Na5 18.Qd2 Nc4 (18...Nc4 19.Qc2 Be6–/+) 0–1. ramoschessbrasil (2480) – acidtest, net–chess.com, 2011.

6.e3 0-0 7.c4 g6 8.Nc3 d5 9.Qc2 Nc6 10.d4 Be7 11.Bd3 dc4 12.Bc4 b5 13.Bd3 Bb7 14.0-0 Rc8 15.Qe2 Qc7 16.Rfc1 Ng4 17.Ne4 Qd8 18.Nc5 Bc5 19.Rc5 Na5 20.Rc8 Qc8 21.Rc1 Qd7 22.Nd2 f5 23.f3 Nf6 24.e4 Re8 25.Qf2 Nh5 26.Qe3 Nc6 27.Nb3 Nf6? (better is 27...e5 28.d5 Nd8+–) 28.Nc5+– Qc8 29.Nb7 Qb7 30.d5 Nd5 (30...ed5 31.Bf6 fe4 32.fe4 Re6+–) 31.ed5 Na5 (31...Qa7 32.Qa7 Na7+–) 32.Qe5 Qd5 (32...Re7+–) 33.Qg7 1–0. Fournier,Frederic (1990) – Cutedorange, Active, 2007.

6.e3 b5 7.c4 bc4 8.Bc4 (8.Bc4 d5 (8...Nc6 9.Qc2 Rb8 10.0-0 Be7 11.Bf6 Bf6=) 9.d4= Bd6 10.Bd3 Nc6 11.Qc2 Bb7=). lasker (2265) – buba12 (2045), internet, 2008.

6.Be5 Nc6 7.d4 Be7 8.Nbd2 0-0 9.e4 Ne4?? (better is 9...d6 10.Bf6 Bf6+=) 10.Ne4+– Qa5 (10...d5 11.Ned2+–) 11.Qd2 Qd8 (11...Qb6 12.c4 Ne5 13.de5 Ba3 14.Ra3 Qb1 15.Qd1 Qe4 16.Re3+–) 12.Bd3 d5 13.Neg5 g6 14.Bf4 (14.Nh3!? Ne5 15.de5 f6+–) 14...f6+/– 15.Nh3 g5 16.Bg3 (better is 16.Bg5!? fg5 17.Nhg5+/–) 16...g4+= 17.Qh6 Rf7 18.Nhg1 gf3 19.Nf3 e5 (better is 19...Qb6!?+=) 20.de5+= fe5 21.Be5 Ne5 22.Ne5 Bg5 (22...Qa5!? 23.Ke2 Rg7+=) 23.Qh5+/– Qa5?? (better is 23...Rg7+/–) 24.Kf1+– Rg7 (24...Rc7 25.Qg5 Rg7+–) 25.Qe8 1–0. Yannick – Tiit145, playchess.de, 2005.

3.a3 d5 4.e3+=.

3.a3 Nf6 4.e3+= b6 (4...Nb8 5.Nf3=) 5.c4 (5.Qf3 Rb8+=) 5...Be7= 6.d4 (6.Nf3 0-0=) 6...0-0 (6...Bb7 7.Nf3+=) 7.Nf3 (7.Bd3 d5=) 7...Ne4 (7...Bb7 8.Bd3+=) 8.Bd3+= Bb7 9.0-0 Ng5 (9...f5 10.Nfd2+=) 10.Nbd2 (10.Ng5 Bg5 11.f4 Be7+/–) 10...Nf3+= 11.Nf3 g6 (11...f5 12.c5+=) 12.e4 (12.Bc3 c5 13.Rb1 Bf6+/–) 12...d5 (12...Nb8 13.Bc1+/–) 13.cd5 (13.ed5 ed5 14.c5 Re8+/–) 13...ed5 14.e5 (14.Re1 Nb8+/–) 14...Bc8 (14...c5 15.dc5 bc5 16.bc5 Nc5 17.Re1+=) 15.Nd2 (15.b5 Nb8+/–) 15...Nb8 (15...c5 16.dc5 bc5 17.Qa4+=) 16.f4 (16.Qc2 c6+/–) 16...a6 (16...c5 17.f5 Bf5 18.Bf5 gf5 19.bc5 bc5 20.Rf5+=) 17.f5 Qe8 (17...Bg5 18.Qe2+/–) 18.fg6 (18.f6 Bd8+–) 18...fg6 19.Rc1 (19.Rf8 Bf8 20.Qf3+=) 19...Nc6 (19...c6 20.Qc2+=) 20.Rf8 (20.Qb3!? Be6+–) 20...Qf8?? (better is 20...Bf8 21.Qc2 Bd7+/–) 21.Rc6+– 1–0. Wall,Bill – Babinba, internet, 2004.

3.b5 Nb4 (--> 2.Bb2 Nc6 3.b5 Nb4).

3.b5 Bc5?? 4.Nc3 (better is 4.Bg7 Nf6 5.Bh8 Nb4+–) 4...Qf6?? (better is 4...Nb8+/–) 5.Rb1 (better is 5.Nf3 b6 6.ba6 Ba6 7.Nb5 Qb2 8.Nc7 Kf8 9.Na6+–) 5...Bf2# (5...Qf2#) 0–1. De Oliveira,GM – Rebelo,YC, Juiz de Fora BRA, World Schools Ch U09b, 2014.

4.e3 d5=.

4.e3 Qf6?? 5.Bf6+– gf6 (5...Nf6 6.d4 Nce4 7.a3+–) 6.c4 Bg7 (6...Ne4 7.f3 Nd6 8.Nc3+–) 7.d4 Ne4 (7...f5 8.Nd2 Ne4 9.Ne4 fe4 10.Qg4+–) 8.Bd3 (better is 8.Qg4!? Ng5 9.h4 h6 10.hg5 fg5+–) 8...f5 9.Be4 fe4 10.Nc3 (10.Qg4 Bf8 11.Qe4 d6+–) 10...d5 (10...Nf6 11.Nge2+–) 11.cd5 a5 (11...Nf6 12.de6 Be6 13.Qc2+–) 12.de6 Be6 13.Ne4 1–0. Trkn – kas1975, itsyourturn.com, 2001.

4.Nf3 Nh6 5.c4 b6 6.e3 Bb7 7.d4 Ne4 8.Be2 Ng4 9.0-0 Bd6 10.h3 Nh2?? (better is 10...Ngf6=) 11.Nh2+– Qg5 12.Nf3 Qg6 13.Bd3 f5 14.Nbd2 (14.Be4 fe4 15.Ne5 Be5 16.de5 a6+–) 14...0-0-0?? (better is 14...Nd2 15.Nh4 Qg5 16.Qd2 Qh4+=) 15.Qc2 (15.Ne4 fe4 16.Bc2 Rhf8+–) 15...Rhf8?? (15...Nd2 16.Nh4 Nf3 17.Kh1 Nh4 18.f4 Ng2 19.e4 Nf4 20.Rf4 Bf4 21.Qg2 fe4 22.Be2–+) 16.a4 (better is 16.Be2+–) 16...a5?? (better is 16...Nd2 17.Nh4 Nf3 18.Kh1 Nh4–+) 17.ba6!+– Ba6 (17...Bc6 18.Be2 Ng5 19.Ng5 Qg5 20.Nf3+–) 18.Ne4 f4 (18...fe4 19.Be4 Qh5+–) 19.Nd6 Kb8 20.Bg6 hg6 21.Nb5 fe3 22.fe3 Rf5 23.e4 Rf7 24.a5 ba5 25.Ra5 Bb7 26.Rfa1 c6 27.Nd6 (27.Qa4 cb5 28.Ra8 Ba8 29.Qa8 Kc7 30.Ra7 Kd6 31.Ba3 b4 32.Bb4) 27...Rf4 28.Nb7 (28.Qb3 Kc7 29.Qb7 Kd6 30.Ba3 c5 31.Bc5) 28...Kb7 29.Qb3 Kc7 (29...Kc8 30.Ra7 Rdf8 31.Qb7 Kd8 32.Qd7) 30.Ra7 Kd6 31.Qb4 c5 32.Qc5 1–0. Fournier,Frederic (1800) – jonyth, Active (2/6), 2004.

3.a3 Be7 4.e3 Nf6–/+ (--> 1.b4 e6 2.Bb2 Nf6 3.e3 Bb4 4.a3 Be7).

3.Bg7 a6 4.Bh8 c6 5.Bc3 Bd6 6.Nf3 Qc7 7.e3 c5 8.Be2 Nc6 9.0-0 b6 10.d4 Bb7 11.dc5 Bc5 12.Bd4 Bd6 13.c4 0-0-0 (13...Nd4 14.ed4 (worse is 14.Nd4 Bh2 15.Kh1 Be5+–; 14.Qd4?! Bf3 15.Bf3 Bh2 16.Kh1 Be5+–) 14...Bf3 15.Bf3+– (15.gf3?! Bh2 16.Kg2 Bf4+–)) 14.Nc3 Nd4 15.Nd4 (15.ed4 Nf6+–) 15...Nf6 (15...Bh2 16.Kh1 Ne7 17.Rb1+–) 16.Rc1 (better is 16.f4!? Bb4 17.Na4 d6+–) 16...Bh2 17.Kh1 Rg8 18.Bf3 Bf3 (18...Be5 19.Qd3+–) 19.Qf3 Ng4 20.g3 (better is 20.Qa8 Qb8 21.Qa6 Kd8+–) 20...h5 (20...Qb7 21.e4 f6 22.Rb1+–) 21.Qa8 (better is 21.Nd5!? Ne5 22.Qe4 f5+–) 21...Qb8 22.Qb8 (better is 22.Qa6!? Qb7 23.Qb7 Kb7+–) 22...Kb8 23.Nf3 (better is 23.Rb1!? Kc7+–) 23...Bg3 24.fg3 Ne3 25.Rg1 Nc4 26.Ne4 Ne3 (26...d5 27.Nf6 Rg6 28.Nd7 Kb7 29.Kh2+–) 27.Nd6 (27.Nf6 Rg7 28.Nd7 Kb7+–) 27...Ng4 (27...f6 28.a3+–) 28.Nf7 Nf2 29.Kg2 Nd3 30.Rcd1 Nf4 31.Kh2 Ne2 (31...Nd5 32.N3e5+–) 32.Rg2 d5 (32...Nc3 33.Rd7 Ne4+–) 33.Re2 Rf8 34.N7g5 Rf5 35.Re6 Rg5 36.Ng5 (36.Ng5 Ka7 37.Re7 Kb8 38.Rf1 d4 39.Rf8) 1–0. Fournier,Frederic (1800) – 78julio (1695), Active, 2005.

3.Bg7 c6 4.Bh8 Qb6 5.e3 Qa5 6.c3 Bd6 7.Bd3 Be5 (7...h6 8.Qg4 Ne7 9.Bf6+–) 8.Qh5 Bh8 (8...Qd5 9.Bf1 Bh8 10.Qh7 Qd6+–) 9.Qa5 b6 10.Qh5 Nf6 11.Qg5 (11.Qh6 d5+–) 11...Ke7 12.e4 d6 13.f4 Nbd7 14.e5 de5 15.fe5 Bb7 16.Bh7 Kd8 17.ef6 Nf6 18.Nf3 Kd7 19.Ne5 Kd6 20.Nf7 Kc7 21.Nh8 (21.Qe5 Kc8 22.Qe6 Nd7 23.Bf5 a5 24.Qd6 Ba6 25.Bd7 Kb7 26.Bc6 Ka7 27.Qc7 Bb7 28.Qb7) 21...Nh7 22.Qg7 (22.Qe7 Kb8 23.Qd6 Kc8 24.Nf7 Ba6 25.Qd8 Kb7 26.Nd6) 22...Kd6+– 23.Qh7 c5 24.0-0 (better is 24.Nf7 Kc6 25.Ne5 Kd5 26.0-0 Rf8 27.Qd7 Ke4 28.d3 Ke5 29.Qc7 Kd5 30.Rf8 Bc6 31.Rd8 Bd7 32.Rd7) 24...Ba6 25.Nf7 Kc6 (25...Kd5 26.c4! Kc6 27.Ne5 Kd6 28.Qd3 Ke5 29.Qg3 Kd4 30.Qc3 Ke4 31.Qe3) 26.Qe4 (26.Ne5 Kd5 27.Qd7 Ke4 28.Nd3 Rf8 29.Rf8 Bd3 30.Qe6) 26...Kc7 27.Qe5 (27.Ne5 Be2 28.Qc6 Kd8 29.Qd7) 27...Kc6 28.Qd6 (28.Qe6 Kc7 29.Ne5 Bb5 30.Qe7 Bd7 31.Qd7 Kb8 32.Rf8) 28...Kb5+– 29.Na3 Ka4 30.Rf4 (30.Qc6 Ka3 31.Qe6 Ka4 32.Qb3 Ka5 33.Qa3 Kb5 34.Ne5 Re8 35.Rab1) 30...Ka3 (30...Ka5 31.Qc6 c4 32.Rc4 Bc4 33.Qc4 Rf8 34.Qb5) 31.Qc6 (31.Qe6 Bc4 32.Qc4 Kb2 33.Qb3 Ka1 34.Rf1) 31...Kb2+– 32.Qa4 Ka1 (32...Bc4 33.Rff1 Bf1 34.Qd1 Bg2 35.Qc1) 33.Qa6 (33.Qd1 Kb2 34.Qb3 Kc1 35.c4 Bb7 36.Qc3 Kd1 37.Rf1 Ke2 38.Qe3) 33...Rd8 (33...Kb1 34.Rf1 Kb2 35.Qc4 Kc2 36.Qe4 Kd2 37.Rf2 Kc3 38.Rc2) 1–0. GuestVHSX – GuestTSGT, freechess.org, 2017.

3.Bg7 Qh4 4.Nf3 Qe4 5.Bh8 b5 6.Nc3 Qc4 (6...Bc3 7.Bc3 Bb7 8.e3+–) 7.e3 Qc3 (7...Qg4 8.h3 Qh5 9.Nb5 Ba5+–) 8.Bc3 Bc3 9.dc3 Nc6 10.Bb5 Na5 11.0-0 (better is 11.Ne5 c6 12.Qh5 cb5 13.Qf7 Kd8 14.Qg8 Kc7+–) 11...c6 12.Bd3 d5 13.Bh7 Nf6 14.Bd3 Ne4 15.Be4 de4 16.Nd2 (better is 16.Ne5 Nc4 17.Nc4 Ba6+–) 16...c5 17.Ne4 Ba6 18.Re1 (18.Qd6 f6 19.Qe6 Kf8 20.Qf6 Kg8 21.Qg6 Kf8 22.Nd6 Ke7 23.Nf5 Kd7 24.Qd6 Kc8 25.Ne7 Kb7 26.Rab1 Nb3 27.Rb3 Bb5 28.Rb5) 18...Rd8 19.Qb1 (better is 19.Qh5 Bb7 20.Rad1 Bd5+–) 19...Nc4 20.Rd1 Na3 21.Rd8 Kd8 22.Qd1 (22.Qd1 Kc7 23.Qd6 Kc8 24.Nc5 Bb5 25.Rd1 Bd3 26.Qc6 Kd8 27.Qd7; 22.Qb8 Bc8 23.Rd1 Ke7 24.Qd6 Ke8 25.Nf6) 1–0. Fournier,Frederic (1830) – yairivanandon (1700), Active, 2011.

4.Nf3 Nh6 5.Bh8 Bb7 6.Bb2 Bc5 7.e3 Nc6 8.Bd3 Qe7 9.Nc3 0-0-0 10.Qe2 Nb4 11.a3 Nc6 12.Ne4 d5 13.Bf6 Qf8 14.Nc5 Re8 15.Nb7 Kb7 16.Ne5 Qd6 17.Ba6 Kb8 18.Qb5 Ng8 19.Nc6 Ka8 20.Be5 Qd7+– 21.Qa4 Ne7 22.Bb5 Ng6 23.Qa7# 1–0. pumpkin (2275) – mleek (1755), net–chess.com, 2008.

4.Bh8 Bb7 5.Bb2 Nc6 6.Nf3 Na5 7.e3 d6 8.Be2 Qe7 9.0-0 0-0-0 10.d4 Nh6 11.c3 Bc5 12.dc5 dc5 13.Qc2 f5 14.Nbd2 Qd6 15.Rfd1 Qe7 16.Ne5 Rg8 17.Bf3 Qg7 18.Bb7 Nb7 19.g3 Qe5 20.c4 Qd6 21.Nf3 Qe7 22.Be5 Nf7 23.a4 h5 24.Kf1 Nbd6 25.Bd6 Nd6 26.a5 Ne4 27.ab6 cb6 28.Qa4 Kb8 29.Qc6 Qb7 30.Qb7 Kb7 31.Rd7 Kc6 32.Raa7 b5 33.Rdc7 Kb6 34.Rab7 Ka6+– 35.cb5 Ka5 36.Ne5 Nd2 37.Ke2 Nb3 38.Nc6 Ka4 39.b6 Ka3 40.Ra7 Kb2 41.b7 Nc1 42.Kf3 Nb3 43.b8Q Rb8 44.Nb8 e5 45.Rc5! Nd2 46.Ke2 Ne4 47.Kf3 Nc3?? 48.Rc3! Kc3 49.Re7 Kd3 50.Re5 Kc4 51.Rf5 h4 52.Rh5 Kd3 53.Rh4 Kc3 54.e4 Kb3 55.Kf4 Kc3 56.e5 Kb3 57.e6 Kc3 58.e7 Kb3 (58...Kb4 59.Ke3 Kc5 60.e8Q Kb6 61.Qc6 Ka7 62.Ra4 Kb8 63.Ra8) ½–½. bratek55 (1630) – gozef (1700), kurnik, 2011.

4.dc3 Nc6 5.Bh8 Nh6 (5...Nf6 6.e3+–) 6.e3 (better is 6.Nf3+–) 6...Qf6 (6...Ke7 7.Bd4 Qg8+–) 7.Bf6 Ne5 8.Be5 c5 9.Qh5 Rb8 10.Bb8 (10.Qh6 d6 11.Bd6 Kd7 12.Qf8 Kc6 13.Bb8 b5 14.Qc8 Kb6 15.Qc7 Ka6 16.Qa7) 10...b6 11.Qh6 Ba6 (11...d6 12.Qf6 c4 13.Bd6 Kd7 14.Qe7 Kc6 15.Qc7 Kd5 16.Nd2 Bd7 17.Bc4) 12.Bd6 Bf1 13.Qf8 1–0. Bonetti,Shane – guest187, ICC, 2002.

4.dc3 e5+–.

4.Bc3 Nf6+–.

4.Nc3!? b6+–.

4.Nc3 f6 5.Bh8 Nc6 6.Nf3 (6.e3 Qe7+–) 6...Nh6 (6...Kf7 7.e3 Nh6 8.Bf6 Qf6 9.Ne4+–) 7.Bg7 (better is 7.Ne4 Ng4 8.h3 d5 9.hg4 de4+–) 7...Nf5 8.Bh8 Ke7 (8...Kf7 9.e4 Nfd4 10.Nd4 Nd4 11.Qh5 Kg8 12.Bf6 Qf6 13.e5+–) 9.Bf6! Kf6 10.e3 e5 11.Bd3 e4 (11...d5 12.e4 d4 13.Nd5 Kg7 14.Nc7 Qc7 15.ef5+–) 12.Ne4 Ke7 13.Neg5 d6 14.Nh7 Ng7 15.0-0 Bf5 16.Bf5 Nf5 17.d4 Qh8 18.Nhg5 Rg8 19.Qd3 Rf8 (19...Qf6 20.Qe4 Kd7 21.Qf4+–) 20.Qe4 Kd7 21.Qe6 Kd8 22.Nf7 Rf7 23.Qf7 Nce7 24.c4 b5 (24...Kd7 25.Rab1 Nh6 26.Qh5+–) 25.Rab1 a6 26.cb5 ab5 27.Rb5 Nh6 28.Rb8 (28.Qe6 Nc6 29.Rfb1 Qd4 30.Rb8 Nb8 31.Rb8) 28...Nc8 29.Qg6 (29.Qe6 Qd4 30.Rc8) 29...Ng4 30.Qg4 (30.Qg4 Ke7 31.Rc8 Qc8 32.Qc8 c6 33.Qc7 Kf6 34.Qd6 Kg7 35.Ne5 Kh8 36.Qg6 c5 37.Nf7; 30.Qe6 Qh2 31.Nh2 Nh2 32.Rc8) 1–0. Fournier,Frederic (1700) – HEBERDANIEL84(C) (1725), Active, 2005.

4.Nc3 Nf6 5.Bh8 e5 6.e4+–.

4.Nc3 Nh6 5.Bh8 f6 (5...d6 6.e4+–) 6.e3 Kf7 7.Qh5 Kg8 8.Qh6 Qe7 (8...Kh8 9.Ne4 f5+–) 9.Bf6 Qf7 10.Nf3 Qg6 11.Qf4 (11.Qg6!? hg6 12.Ne5 Kh7+–) 11...d6 12.Bd3 (12.e4 Nc6+–) 12...Qf7 13.Ng5 Qe8 14.Bh7 Kf8 15.Bd8 Kg7 16.Qf6 1–0. Rush,Bradley – Withrow,Avis, IECG, 1995.

4.e3 Ne7 5.Bh8 Ng6 6.Bb2 (6...d5 7.Nc3+–) 1–0. Bonetti,Shane – pcisme, ICC, 2002.

4.Bh8 d5 5.e3+–.

4.Bh8 Qh4 5.d4 (5.d4 Bb6 6.Nf3+–) 1–0. Wall,Bill – Zlulian, chess.com, 2009.

4.Bh8 Bc5 5.Nc3 Qh4 6.e3 Nd4 7.ed4 Bd4 8.g3 Qe4 9.Ne4 Bf2 10.Kf2 f5 11.Qh5 Kd8 12.Qf7 Ne7 13.Qf8# 1–0. marre – MarsPF2, internet, 2010.

4.Bh8 d5 5.a3 Be7 6.e3 1–0. Finogenov,Mikhail – Koltsov,Andrey, RUS–Cup sf, 2005.

4.Bh8 d5 5.e3+–.

4.Bh8 f6 5.a3 Bd6 6.e4 Qe7 7.Qh5 (7.d4 Bf4+–) 7...Qf7 (7...Kd8 8.Nf3+–) 8.Be2 (8.Qf7 Kf7 9.Nf3 Nge7+–) 8...Ne5 (8...Qg6 9.Qg6 hg6 10.Nf3+–) 9.Qf7 Nf7 10.Bh5 (10.Bg7 Ng5 11.Bh5 Kd8+–) 10...h6 (10...Be5 11.c3+–) 11.Nc3 (11.d4 Kf8 12.Bf7 Kf7+–) 11...Kf8 12.Bf7 Kf7 13.d4 (13.Nb5 Bf4+–) 13...Kg6 (13...Ne7 14.e5 fe5 15.de5+–) 14.e5 (14.Nb5 a6 15.Nd6 cd6+–) 14...fe5 (14...Be7 15.Nb5 c5 16.Nc7+–) 15.Be5 Be5 16.de5 d6 (16...d5 17.Nf3+–) 17.ed6 (17.Nb5 de5 18.Nc7 Rb8+–) 17...cd6 18.0-0-0 d5 19.Nf3 Nf6 20.Rhe1 Bd7 21.Ne5 Kg7 (21...Kf5 22.Nd7 Nd7 23.Nd5+–) 22.Nd7 Nd7 23.Re6 Nb6 (23...Rf8 24.Re7 Rf7 25.Nd5 Re7 26.Ne7+–) 24.Nd5 Nd5 (24...Nc4 25.Re7 Kg6 26.Rb7+–) 25.Rd5 b6 (25...Kf7 26.Rh6 Kg7 27.Rhd6+–) 26.Rdd6 (26.Rd7 Kf8 27.Rh6 Kg8+–) 26...Rf8 (26...Kf7 27.Rh6 Kg7 28.f4+–) 27.Rh6 (better is 27.Re7 Rf7 28.Rf7 Kf7 29.Rh6 b5 30.Rh7 Kf6 31.Ra7 Ke6+–) 27...Rf2 28.Rdg6 (28.Rhg6 Kh7 29.Kb2 Rf5+–) 28...Kf7 29.Rg3 Re2 (29...b5 30.Ra6 Re2 31.Ra7 Kf6 32.Ra6 Kf5 33.Rb6+–) 30.Rh7 Ke6 31.Ra7 Kd5 32.Ra4 (32.Rg6 b5 33.Rb7 Re1 34.Kd2 Rb1 35.Rg5 Kd6 36.Rb6 Ke7 37.Rg7 Kf8 38.Rc7 Rd1 39.Kd1 Kg8 40.Rb8) 32...Kc5 (32...b5 33.Rb4 Kc6 34.Rg6 Kc5 35.Rg5 Kd6 36.Kb2+–) 33.h4 (33.Rb4!? Rf2+–) 33...Re8 (33...b5 34.Rb4 Re5 35.Rc3 Kd6 36.a4 ba4 37.Ra4+–) 34.Rg5 (34.Rc3 Kd5+–) 34...Kc6 (34...Kd6 35.Rd4 Kc7 36.g4+–) 35.h5 (better is 35.Rc4 Kb7 36.g4 Re3+–) 35...b5 (35...Re6 36.Rg6 Kd5 37.c4 Ke5 38.Re6 Ke6 39.Rb4+–) 36.Rh4 (36.Rb4 Ra8+–) 36...Re1 (36...Ra8 37.h6 Ra3 38.h7 Ra1 39.Kd2 Rd1 40.Kd1 Kb6 41.h8Q Ka5 42.Qd8 Ka6 43.Rh6 Kb7 44.Rg7) 37.Kd2 (37.Kb2!? Re8+–) 37...Re8 (37...Ra1 38.Rb4 Kd6 39.Rb3+–) 38.h6 (better is 38.c4 Rd8 39.Kc3 bc4+–) 38...Rh8 (38...Rd8 39.Ke3 Ra8 40.Rg6 Kd7 41.h7 Re8 42.Kd4+–) 39.h7 Kd7 40.Rg8 (40.Rg8 Rh7 41.Rh7 Kc6 42.Rh6 Kc5 43.Rg5 Kd4 44.Rh4) 1–0. Choong,Yita – Cohn,Jason, AUS–ch U12 Sydney, 2002.

4.Bh8 c6 5.Bb2 Nd7 6.e3 Qe7 7.Nf3 (7...e5 8.Be2+–) 1–0. Bonetti,Shane – DoctorRook, ICC, 2002.

4.Bh8 Nc6 5.e3 d4 6.ed4 Nd4 7.c3 Nc6 8.cb4 Nb4 9.Qg4 Nc2 10.Kd1 Na1 11.Qg8 Kd7 12.Qh7 Qe7 13.Ba1 b6 14.Bb5 c6 15.Bc6 Kc6 16.Qe4 Kd7 17.Qa8 Qb4 18.Qa7 Kc6 19.Nc3 Qg4 20.Nf3 Qg2 21.Ne5 Kc5 22.Qc7 Kd4 23.Ne2 Ke4 24.Qc2 Kd5 25.Qc6# 1–0. Rosner,Dirk – random2, atlanticchess.com, 2001.

4.Bh8 Na6 5.Bc3 f6 (5...Nf6 6.e3+–) 6.Nf3 (6.e3!? Bc3 7.Qh5 Kf8 8.Nc3 Kg7+–) 6...e5 7.e3 Bg4 8.h3 Bf3 9.Qf3 Rb8 10.Ba6 Ke7 (10...ba6 11.Qh5 Ke7 12.Qh7 Ke6 13.Qd3+–) 11.Bb4 (better is 11.Bb7 a5+–) 11...Ke6 (11...ba6 12.Nc3 c5 13.Ba3+–) 12.Bc4 Ke7 13.Nc3 (better is 13.Qf5!? Qf8 14.Qh7 Kd8 15.Bg8 Qe7+–) 13...Qd7 14.Qh5 (better is 14.Qg3 Rf8 15.Bg8 Kd8+–) 14...h6 15.Qf7 (15.Qf7 Kd8 16.Qg8 Qe8 17.Qg7+–) 1–0. Fournier,Frederic (2065) – elgueroarroyo (1780), Active, 2004.

4.Bh8 d5 5.e3 Nf6 6.Nf3+–.

4.Bh8 e5 5.c3 Bc5 6.e3 Bf5 7.Qf3 Qg5 (7...Ne7+–) 8.Qb7 1–0. Karlsson,Patrik (1885) – Cory,David, IECG, 2002.

4.Bh8 d5 5.Nf3+–.

4.Bh8 f6 5.e3 Qf8 6.Qh5 Ke7 (6...Qf7 7.Qf7 Kf7 8.Bd3+–) 7.Qh7 Qf7 8.Qf7 Kf7 9.Nf3 Nh6 10.Nc3 Bc3 11.dc3 Nc6 12.Bb5 (12.Be2 d5 13.Nh4 e5 14.Bh5 Ke6+–) 12...Ne7 13.0-0 (better is 13.Nh4 d5 14.Be2 e5 15.Bh5 Ke6+–) 13...Ng6 14.Bf6! Kf6 15.Bd3 Ne5 16.Ne5 Ke5 17.f4 Kd6 18.Rad1 Ke7 19.f5 (19.h3 b6+–) 19...d5 (19...Nf5 20.Bf5 ef5 21.Rf5+–) 20.f6 Kf7 21.e4 Ng4 22.ed5 (better is 22.Rde1!? Bd7+–) 22...Ne3 23.de6 (better is 23.g4!? ed5 24.g5 Bh3+–) 23...Be6 24.Rde1 Nf1 25.Rf1 Re8 26.h3 (better is 26.a4 Rh8+–) 26...Ba2? (26...Rh8 27.a4+–) 27.g4 (27.c4 Re6 28.g4 Rf6+–) 27...Be6 (27...Re3 28.c4 Rh3 29.Kg2+–) 28.Kh2 (28.g5 Rg8 29.h4 a5+–) 28...b6 (28...Rg8 29.Kg3+–) 29.g5 c5 (29...Kf8 30.g6+–) 30.g6 Kg8 (30...Kf8+–) 31.f7 Bf7 32.gf7 Kf8 33.fe8Q Ke8 34.h4 Ke7 35.h5 Ke6 36.h6 Ke5 (36...Ke7 37.h7 Ke6 38.Bc4 Ke7 39.Rf7 Kd6 40.h8Q b5 41.Qf6) 37.h7 Kd5 (37...Ke6 38.h8Q c4 39.Rf6 Ke5 40.Qd8 cd3 41.Qd4) 38.h8Q c4 (38...a6 39.Qf6 b5 40.Rf5) 39.Qd8 (39.Qf6 cd3 40.Rf5 Kc4 41.Qc6) 39...Kc5 (39...Kc6 40.Be4 Kb5 41.Qd5 Ka4 42.Ra1) 40.Qd4 (40.Rf5 Kc6 41.Be4) 40...Kb5 (40...Kc6 41.Be4 Kb5 42.Qe5 Ka4 43.Ra1) 41.Qc4 Ka5 42.Qb5 (42.Ra1) 1–0. Fournier,Frederic – trancadis, Active, 2007.

4.Bh8 Nf6 5.Bf6 (5.c3!? Bc5+–) 5...Qf6 6.c3 Bc3 (6...d5+–) 7.Nc3 Nc6 8.e3 Nb4 9.Nf3 Qf5 10.d4 (10.Nd4 Qe5+–) 10...Qc2 (10...Nc2 11.Kd2 Na1 12.Qa1+–) 11.Qc2 (better is 11.Rc1 Qd1 12.Kd1 a6+–) 11...Nc2 12.Kd2 Na1 13.Bd3 b6 14.Ra1 Bb7 15.Bh7 Bf3 16.gf3 Ke7 17.Be4 Rh8 18.Rh1 a6 19.a4 b5 (19...c5 20.d5+–) 20.ab5 ab5 21.Nb5 d5 22.Bd3 c6 23.Nc3 Ra8 24.h4 Rh8 25.h5 Kf6 26.e4 de4 27.fe4 Kg5 28.Be2 Kf4 29.Kd3 e5 30.d5 cd5 31.ed5 Rd8 32.f3 f6 (32...Kf5 33.Ke3 Kf6 34.Ne4 Kg7 35.Rg1 Kh6 36.Nf6+–) 33.h6 (33.Rg1 f5+–) 33...Rh8 (33...Kg5 34.h7 Rh8 35.Kc4+–) 34.h7 (better is 34.Ne4!? Rd8 35.Rh4 Kf5+–) 34...Kf5 35.Ne4 Kg6 36.d6 Kf7 37.Nc5 Ke8 38.Kc4 Kd8 39.Kd5 (39.Rg1 Rf8 40.Rg8 Ke8 41.h8Q Kf7 42.Qg7 Ke8 43.Qf8) 39...Kc8 (39...Ke8 40.f4! Kf8 41.Ne6 Ke8 42.Bh5 Kd7 43.Rc1 Rc8 44.h8R Rc1 45.Rd8) 40.Bb5 White prepares the advance d7 (40.Ra1 Kb8 41.Nd7 Kc8 42.Kc6 Rh7 43.Ra8) 40...Kd8 (40...Kb8 41.Nd7 Kb7 42.Bc6 Kc8 43.Rb1 Rh7 44.Rb8) 41.d7 (41.Ra1 Rh7 42.Ra8) 41...e4 (41...Ke7 42.Rg1 Kf7 43.Bc4 f5 44.Ke5 Ke7 45.Rg7 Kd8 46.Ne6) 42.fe4 (42.Kd6 Rh7 43.Ne6) 42...Kc7 43.Ne6 Kb6 44.d8Q Rd8 45.Nd8 Kb5 46.h8Q Kb4 47.Qf6 Kb3 48.Qb6 (48.Rh3 Ka4 49.Qa6 Kb4 50.Nc6) 48...Kc3 (48...Kc2 49.Kc4 Kd2 50.Qf2) 49.Rc1 (49.Rh2 Kd3 50.Qd4) 49...Kd2 50.Qb2 (50.Qc5 Ke2 51.Qc3 Kf2 52.Rc2 Kf1 53.Qa1) 50...Ke3 51.Qd4 (51.Rc3 Kf4 52.Ne6 Kg4 53.Qg2 Kh5 54.Qg5) 51...Kf4 (51...Kf3 52.Qc3 Kf4 53.Ne6 Kg4 54.Rg1 Kh5 55.Qh8) 52.Rf1 (52.Qf2 Kg4 53.Rg1 Kh5 54.Qh2) 52...Kg5 (52...Kg3 53.Qc3 Kh4 54.Rg1 Kh5 55.Qh8) 53.Qf6 (53.Rg1 Kf4 54.Qf2) 53...Kh5 54.Qg7 Kh4 55.Rh1 1–0. Fournier,Frederic – trigo1, Active, 2007.

4.Bh8 f6 5.Bg7 (better is 5.e4 Nh6 6.Qh5 Nf7 7.Qh7+–) 5...Kf7 6.e4 (6.Bh8!? Nh6+–) 6...Kg7 7.d4 Nh6 8.Bd3 Qe8 (8...d5 9.Nf3+–) 9.Nh3 (9.Qf3 c5 10.c3 d5+–) 9...e5 10.0-0 (10.d5 Bc5+–) 10...d6 11.Kh1 Bg4 12.Be2 f5 13.ef5 Bf5 14.Bd3 e4 15.Be2 d5 (15...Bh3 16.gh3 Bf6 17.c3+/–) 16.Nf4+– Qf7 17.Bh5 (17.f3!? e3 18.Qc1 Nc6 19.Qe3 Re8+–) 17...Bg6+/– 18.Ng6 hg6 19.Be2 Nd7 20.Nd2 Nf5 21.Bg4 Rh8 22.Rb1 Bd6 23.Bh3 (23.h3 Nb6+/–) 23...b6+= 24.Qg4 (24.c4 c5 25.dc5 Nc5 26.cd5 Qd5+=) 24...Rh5 (24...Nd4 25.c3 Nf6 26.Qg5–/+) 25.c4 (better is 25.Nb3+=) 25...e3?? (better is 25...Nd4 26.cd5 Nf6+=) 26.fe3+– Nf6 27.Qe2 Ne4 (27...Qe6 28.Rbe1+–) 28.Ne4 de4 29.Rf2 Rg5 (29...Qf6 30.Rf5! Rf5 31.Bf5 gf5+–) 30.g4 Bg3 (30...Ng3 31.hg3 Qe6 32.Rbf1+–) 31.Rf5 (better is 31.Rff1+–) 31...gf5 32.hg3 Kf6 (32...fg4 33.Bg2+– (worse is 33.Bg4 Qg6 34.Bh3 Rg3+–)) 33.Rf1 Qh7 (33...Qg8 34.Qc2 Rg4 35.Qf2+–) 34.Kg2 Ke6 (34...Ke7 35.gf5 Qg8 36.Qf2 Qc4 37.Qf4+–) 35.d5 (35.Rf5 Qg8+–) 35...Kd6 (35...Kd7 36.gf5 Kd8 37.f6+–) 36.Rf5 Rg8 (36...Rg6 37.Qf2 Qg7 38.Qf4 Kc5 39.d6 Kb4 40.Qe4 Qb2 41.Rf2+–) 37.g5 Rh8 (37...c6 38.Qb2 Qg7 39.Qa3 c5 40.Rf6 Qf6 41.gf6 Rh8 42.Qa7 Re8 43.Qb6 Ke5 44.f7 Re7 45.f8Q Rh7 46.Qe6) 38.Qg4 (38.Rf6 Ke7 39.Qg4 Qh3 40.Qh3 Rh3 41.Kh3 b5+–) 38...Kc5 (38...Qh5+–) 39.d6 Kd6 (39...Kb4 40.Rb5 Kc3 41.dc7+–) 40.Rd5 (40.Qf4 Kc6 41.Qe4 Kd6 42.Qe5 Kd7 43.Rf7 Kc6 44.Qc7) 40...Kc6+– 41.Qd7 (better is 41.g6 Qe7 42.Qe6 Qe6 43.Be6 Rb8+–) 41...Qd7 (41...Kb7 42.Qh7 Rh7 43.g6+–) 42.Bd7 Kb7 43.g6 c6 (43...Rg8 44.Bf5 a6 45.Be4 Kc8+–) 44.Rg5 Rg8 45.g7 Rd8 46.Be6 Kc7 (46...Ka6 47.Rf5 Re8 48.c5+–) 47.g8Q Rg8 48.Rg8 (48.Bg8 a6+–) 48...Kd6 49.Bf7 Ke7 (49...Kc5 50.Re8 b5 51.cb5 cb5 52.g4+–) 50.Bh5 (50.Bg6 Kd6+–) 50...Kf6 (50...Kd6 51.Bg6+–) 51.g4 c5 52.Kg3 Ke5 53.Re8 (53.Rg6 b5 54.Rh6 a6 55.Bf7 bc4 56.Bc4 a5 57.Re6) 53...Kf6+– 54.Re4 a6 55.Rf4 Ke5 56.g5 b5 (56...Kd6 57.g6 Ke6 58.g7 Kd6 59.Rf6 Ke5 60.g8Q Kf6 61.Qf7 Ke5 62.Qe7 Kf5 63.e4) 57.g6 bc4 (57...Kd6 58.g7 Ke6 59.g8Q Ke7 60.Qg7 Ke6 61.Rf6 Ke5 62.Qe7) 58.Rc4 (58.g7 Kd5 59.g8Q Kc6 60.Qc8 Kb5 61.Qb7 Ka5 62.Rf6 c3 63.Ra6) 58...Kd5 59.Rc5! (59.Rc5 Kd6 60.Rc8 Ke6 61.g7 a5 62.g8Q Ke5 63.Rc5 Kd6 64.Qf8 Ke6 65.Bg4) 1–0. Trigance,Emile – Salinas,Marcelo, FICGS, 2011.

4.Bh8 Bf6 5.Bf6 Qf6 6.Nc3 a6 7.e3 b5 8.a3 a5 (8...Ne7 9.Nge2+–) 9.Nb5 c6 (9...Kd8+–) 10.Nc7 Ke7 11.Na8 Na6 12.Nb6 Bb7 13.Nf3 (13.Rb1 Nc5+–) 13...Nc5 14.Be2 (14.d4 Ne4 15.Qb1 Nd6+–) 14...Ne4 15.0-0 c5 16.d3 (16.Rb1 Nd6+–) 16...Ng5 17.Ng5 Qg5 18.Bf3 Bf3 19.Qf3 Qf6 20.Nc4 (20.Qb7 Qc3 21.Nd7 c4 22.Ne5 Kf6 23.Qf7 Ke5+–) 20...e5 21.Qf6 (better is 21.Qa8 Nh6+–) 21...Nf6 22.f4 1–0. Fournier,Frederic – paniker, Active, 2006.

4.Bh8 Bf6 5.Bf6 Qf6 6.Nc3 Nh6 7.e3 Nc6 8.Nf3 d5 9.Bb5 Bd7 10.Bc6 Bc6 11.0-0 0-0-0 12.d4 Rg8 13.g3 Qf5 14.Nh4 Qh3 15.Nf3 Ng4?? (15...Qf5 16.Rb1 f6+–) 16.Ne2+– Bb5 17.Re1 Nf6 18.Nf4 Qf5 19.a4 Ba6 20.Nh4 Qg5 21.Qf3 (better is 21.Nhg2+–) 21...Qh4 22.Ng2 (22.Nd3 Bd3 23.cd3 Rg6+–) 22...Qg5 23.Ra3 (23.Reb1 Qg6+–) 23...Qh6 24.Qf4 Qg6 25.Rc3 Bc4 26.f3 Qg7 (26...Nh5 27.Qe5+/–) 27.e4+– c6 (27...Ne8 28.e5+–) 28.e5 Nd7 29.Ne3 Ba6 30.Rb3 Nb6 31.Rb4 Rh8 32.a5 Nc4 33.Nc4 Bc4 34.Reb1 ½–½. Paauwe,J – Zweedijk,L, PK Zeeland, 2001.

4.Bh8 Bf6 5.Bf6 Qf6 6.d4 c5 7.Nf3 Nc6 8.e3 e5 9.de5 Ne5 10.Nbd2 b6 11.Ne5 Qe5 12.Nf3 Qc3= 13.Nd2 Nf6?? 14.Be2 Ne4 15.0-0 Nd2 16.Re1 Ne4?? 17.Qd5 Rb8 18.Qe4 Kd8 19.Qh4 Kc7 20.Qh7 Qf6 21.Bc4 Bb7 22.Qf7 Qg5 23.Qf4 Qf4 24.ef4 Rg8 25.g3 d5 26.Bb5 a6 27.Bd3 c4 28.Bf5 Rf8 29.g4 b5 30.h4 a5 31.h5 a4 32.h6 b4 33.h7 b3 34.ab3 ab3 35.cb3 c3 36.Re7 Kc6 37.Rg7 (37.Rg7 Rh8 38.Ra7+–) 1–0. Miner,P Allen – Chen,H (2190), 1st Thanksgiving Open, Stillwater USA, 2009.

4.Bh8 d6 5.Bf6 Nbc6 (5...Nd7 6.Bh4+–) 6.e3 Qd7 7.Bb5 a6 8.Be7 Qe7 (8...ab5 9.Bg5 e5 10.c3+–) 9.Bc6 bc6 10.Nf3 Rb8 11.a3 Bc5 12.Nc3 Bb6 13.Rb1 Bb7 14.d3 c5 15.e4 Qf6 16.Na4 Ba5 17.Nd2 Kd8 (17...Qd4 18.c3! Bc3 19.Nc3 Qc3 20.Rb3+–) 18.Nb2 (18.0-0 Bd2 19.Qd2 h6+–) 18...Kc8 (18...Be4 19.de4 Rb2 20.0-0+–) 19.Nbc4 Bd2 20.Qd2 d5 21.Na5 Ba8 22.Rb8 Kb8 23.0-0 d4 (23...de4 24.de4 Qd4 25.Qg5+–) 24.Rb1 Kc8 25.Nc4 Bc6 26.Qa5 Qg7 (26...Bb5 27.Nd2 e5+–) 27.Qa6 Kd7 28.Na5 (better is 28.Rb8!? Ke7 29.Qc6 Kf6 30.Qc7 h5+–) 28...f5 (28...Ba4 29.Qc4 Bc2 30.Qb5 Ke7 31.Qc5 Kf6 32.Nc6+–) 29.Qc6 (29.Qc6 Ke7 30.Qc7 Kf6 31.Qd8 Kg6 32.Rb7 fe4 33.Rg7 Kg7 34.Qe7 Kg6 35.Qe6 Kg7 36.Qe7 Kg8 37.de4 d3 38.cd3 c4 39.e5 h6 40.e6 Kh8 41.Qf7 cd3 42.e7 d2 43.e8Q) 1–0. Fournier,Frederic – rafai, Active, 2007.

4.Bh8 Ng6 5.Bc3 Bc3 6.Nc3 Qf6 7.e3 Nc6 8.Qf3 Nb4 (8...Qg7+–) 9.Qf6 1–0. Fournier,Frederic – gorimoto, Active echecs21.com, 2004.

4.Bh8 Ng6 5.Bc3 Bc5 6.d4 Bb6 7.e3 d5 8.Nf3 Qf6 9.Bb5 c6 10.Be2 Nd7 11.Nbd2 c5 12.Bb5 a6 13.dc5 (13.dc5 Qc3 14.Bd7 (14.cb6?! ab5 15.Nd4 Nb6+–) 14...Bd7 15.cb6+–) 1–0. Schandorff,L – Klein,Heinz, Beijing, 1998.

4.e4 e5 (4...Ne7 5.Qh5 Ng6 6.Bh8+–) 5.Qh5 Ke7 6.c3 Ba5 7.Bh8 1–0. Wall,Bill – JD, chess.com, 2009.

4.Nf3 Ne7 5.Bh8 Kf7 6.Bf6! Kf6 7.c3 Ba5 8.Qa4 Nbc6 9.Qf4 Kg7 10.e3 Ng6 11.Qg3 Nce7 12.Bd3 c6 13.Nh4 Bc7 14.Qg4 d5 15.Bg6 hg6 16.d4 e5 17.Qg5 e4 18.0-0 Qf8 (18...Qd6 19.f4+–) 19.f4 (19.f3 ef3 20.Rf3 Qe8+–) 19...Bd8 20.Qe5 Kh7 21.Qd6 Qe8 22.Nd2 Bd7 23.c4 (23.g3 Nc8 24.Qe5 Bh4 25.gh4 Nb6+–) 23...Kg8? (better is 23...Nc8 24.Qe5 Bh4 25.cd5 cd5 26.Qd5 Bc6+=) 24.a4 Kh7 25.Rab1 Nc8 26.Qe5 Bh4 27.Qe8 Be8 28.Rb7 Kh6 29.f5?? (better is 29.g4 g5 30.f5+–) 29...gf5= 30.Rf5? (better is 30.Rb3=) 30...Nd6–+ 31.Rf4 Nb7 (better is 31...Bg5 32.Rb4 Bf4 33.ef4 e3–+) 32.Rh4–/+ Kg7 33.cd5 (33.Rg4!? Bg6 34.Rg5–/+) 33...cd5–+ 34.Rg4 Kf6 35.Rf4 Ke6 36.Rf8 Rd8 37.g4? (better is 37.Rh8!?–/+) 37...Ba4–+ 38.Rd8 Nd8 39.Nb1 a5 40.Kf2 Bb3 41.h4 a4 42.Kg3 Nf7 43.Kf4 Kf6 44.Na3 Bd1 45.Nb1 Bc2 46.Na3 Bd3 47.h5 Ng5 48.Kg3 Nh7 49.Kf4 Be2 50.Nc2 (50.Nb1 Kf7–+) 50...Bd1 51.Na3 Bb3 (51...Ng5!? 52.Kg3–+) 52.Nb1 Bc2?? (better is 52...Bc4–+) 53.Na3= Bd3 54.h6 Kg6 55.Ke5 Bc4 56.Kd6 (56.Kf4 Bb3–+) 56...Kh6 57.Kc5 Bb3 58.Nb1 Nf6 59.Kb4 Ng4 60.Nc3 Ne3 61.Na4 (61.Ne2–+) 61...Ba4 62.Ka4 Kg5 0–1. Beljushina,Sonja (1635) – Plekhanov,Georgy, Sterlitamak RUS, Rochinskiy Open, 2012.

4.Bh8 c6 5.e3 Qb6 (5...Qe7+–) 6.Qh5 Kd8 7.Qf7 Kc7 8.Qg8 Qc5 (8...Be7 9.Nc3 Qb2 10.Rb1 Qc2 11.Qf7+–) 9.Bf6 Qc2 10.Qd8 Kd6 11.Ne2 Kd5 12.Nf4 Kc5 (12...Kd6 13.Qf8 Kc7 14.Bd8) 13.Qf8 d6 14.Bd4 1–0. Fournier,Frederic (1765) – layner322(C), Active, 2006.

4.Bh8 d5 5.e3 Qe7 6.Qg4+–.

4.Bh8 d5 5.e4! Qe7 6.c3 Bd6 7.Qg4+–.

4.Bh8 Bd6 5.e3 Be5 (5...Qe7 6.Qh5 Qf7 7.Qf7 Kf7 8.Bd3+–) 6.c3 (better is 6.d4!? Bd6 7.Qh5 Kf8+–) 6...Qe7 7.d4 Bd6 8.Nf3 b6 9.Be2 Nc6 10.Nbd2 Bb7 11.0-0 0-0-0 12.Bb5 (better is 12.Ne4!? Ba3 13.Qa4 Na5+–) 12...Na5 (12...Nh6 13.Bf6! Qf6 14.Ne4+–) 13.Qe2 (13.c4 c6 14.c5 Bc7+–) 13...c6 (13...Nh6 14.Bf6! Qf6 15.Bd3+–) 14.Ba6 b5 (14...Nh6 15.Nb3 b5 16.Bb7 Nb7 17.a4+–) 15.Bb7 Nb7 16.Ne4 (16.a4 Nh6 17.ab5 Rh8 18.Ra7 c5+–) 16...Bc7 (16...Bb8 17.a4 d5 18.Ned2+–) 17.a4 f5 (17...d5 18.ab5 de4 19.bc6 ef3 20.cb7 Kb8 21.Qf3+–) 18.Nc5 (18.Ned2 Nh6 19.Be5 ba4 20.Bc7 Kc7+–) 18...Nh6 (18...Nc5 19.dc5 Qc5 20.ab5 cb5 21.Rfb1+–) 19.Be5 (19.Nb7 Rh8 20.ab5 Kb7 21.bc6 Kc8 22.Ra7 Qd6 23.Ra8 Bb8+–) 19...Be5 20.Ne5 Qd6 (20...Nc5 21.ab5 Rg8 22.Ra7 Qg7+–) 21.Nb7 Kb7 22.ab5 Ka8 (22...cb5 23.Qb5 Qb6 24.Rfb1 Qb5 25.Rb5 Ka8 26.Rba5+–) 23.bc6 (better is 23.b6 Qb8 24.Rfb1+–) 23...dc6 24.Qa6 Qc7 25.Nc6 Rd6 (25...Rd7 26.Rfb1 Qh2 27.Kh2 Ng4 28.Kg1 Rd4 29.Qa7) 26.Qa7 Qa7 27.Ra7 1–0. Fournier,Frederic (1670) – bigtiger02(C) (1690), Active, 2004.

4.Bh8 Bd6 5.e4!? Qe7+–.

4.Bh8 Bd6 5.Nf3 Kf7 6.e3 (better is 6.e4 Ne7 7.e5 Qh8 8.ed6 cd6+–) 6...Nh6 7.Bf6! Qf6 (7...Qf6 8.Nc3 Combination; 7...Kf6 8.Nc3 Combination) 8.Nc3 Bb4 9.Ne4 Bd2 (9...Qe7+–) 10.Nfd2 (10.Qd2?! Qa1 11.Ke2 b6+= (worse is 11...Qa2 12.Qc3+/–); worse is 10.Kd2 Qe7+–) 10...Qe5 11.Bd3 d5 12.Ng3 Nc6 (12...Kg8 13.Rb1+–) 13.Qh5 (13.Bh7!? Qg7 14.Bd3 Ke8+–) 13...Kg7 14.0-0 Bd7 15.Qe5 (15.Rab1!? b6+–) 15...Ne5 16.f4 Nd3 17.cd3 Bb5 18.Rfb1 a6 19.a4 Bd3 20.Rb7 Rc8 21.Rc1 Kf6 22.Rcc7 Rc7 23.Rc7 Ng4 (23...Nf5 24.Nf5 Kf5 25.Rh7+–) 24.e4 d4 (24...de4 25.Nde4 Be4 26.Ne4 Kf5 27.Nc5 Kf4 28.Rh7+–) 25.Rd7 (25.Nf3!? e5+–) 25...e5 26.fe5 Ke5 27.Nf3 Kf4 28.Rd4 Ke3 29.Nf1 (better is 29.Nf5 Ke2 30.Ng5+–) 29...Bf1 30.Kf1 (30.h3!? Bg2 31.Kg2 Ne5+–) 30...Nh2 31.Ke1 (31.Nh2!? Kd4 32.Nf3 Ke4 33.Ng5 Kd5 34.Nh7 Kd6+–) 31...Nf3 32.gf3 Kd4 33.Ke2 h5 (33...Ke5 34.Ke3+–) 34.a5 h4 35.Kf2 Ke5 36.Kg2 Kf4 37.Kh3 Kf3 38.e5 Ke4 39.e6 Kd5 40.e7 Kc5 41.e8Q Kb4 42.Kh4 (42.Qd8 Kc4 43.Qc7 Kd5 44.Qb7 Ke5 45.Qa6 Kd5 46.Qb5 Ke6 47.a6 Ke7 48.a7 Ke6 49.a8Q Ke7 50.Qe5 Kd7 51.Qae8) 42...Ka5 43.Qb8 (43.Qc6 Kb4+–) 43...Ka4 44.Kg4 a5 45.Kf4 Ka3 46.Ke4 a4 (46...Ka2 47.Kd3 a4 48.Kc2 a3 49.Qb1) 47.Kd3 Ka2 48.Kc2 a3 49.Qb1 1–0. Fournier,Frederic (1935) – pablogolz (1750), Active, 2004.

4.Bh8 Kf7 5.e3 Nh6 6.Qh5 Kg8 7.Qh6 Kh8 8.Bd3 Qg8 (8...Qe7 9.a3 Bc5 10.Nc3+–) 9.Qf6 Qg7 10.Qg7 (10.Qd8!? Qg8 11.Qc7 Nc6+–) 10...Kg7 11.Nf3 h6 (11...b6 12.Nc3+–) 12.c3 (12.Nc3 Nc6+–) 12...Bd6 (12...Be7 13.c4+–) 13.h4 (13.c4 Na6+–) 13...Nc6 14.g4 (14.a4 Na5 15.Ra2 Kf6+–) 14...Ne7 (14...a6 15.Bc2+–) 15.g5 (better is 15.a4 b6+–) 15...Nf5 (15...b6 16.Be4 Rb8 17.d4+–) 16.Rg1 (16.Bf5 ef5 17.Nd4 f4 18.Nf5 Kg6 19.Nd6 cd6+–) 16...h5 17.Bf5 (17.Nd4 Ne7+–) 17...ef5 18.d4 (18.c4 b6+–) 18...c5 (18...b6 19.Ne5+–) 19.Nbd2 b5 (19...b6 20.Nc4 Bf8 21.dc5 bc5 22.0-0-0+–) 20.a4 a5 (20...b4 21.dc5 Bc5 22.cb4 Bb4 23.Rc1+–) 21.ab5 Bb7 22.Ke2 a4 (22...Bd5 23.Ra4+–) 23.Nc4 Bc7 (23...Be7 24.Nb6 Rb8 25.Nd7 Bf3 26.Kf3 Rb5 27.Ra4 cd4 28.cd4+–) 24.b6 (better is 24.dc5 Bd5 25.Nfe5 Be5 26.Ne5 Bb3+–) 24...Bb8 (24...Bd5 25.Nfe5 Be5 26.Ne5+–) 25.Nce5 (better is 25.dc5 f4+–) 25...cd4 (25...d6 26.Nd3 Ra6 27.Rgb1+–) 26.ed4 Bc8 (26...d6 27.Nd3 Ra6 28.Rgb1+–) 27.Rgb1 Bb7 28.Nd7 Bf3 29.Kf3 Bf4 30.Kf4 a3 (30...Re8 31.b7 Re4 32.Kf5 Re7 33.b8Q Rd7 34.Qe5 Kh7 35.g6 Kg8 36.Rb8 Rd8 37.Rd8) 31.b7 Ra7 (31...Rd8 32.Ra3 Kh7 33.Ra8 Rb8 34.Rb8 Kg7 35.Kf5 Kh7 36.Re1 Kg7 37.Re7) 32.Ne5 a2 (32...Kh7 33.b8Q Re7 34.Qf8 Re5 35.de5 a2 36.Ra2 Kg6 37.Qg8) 33.Rb6 Ra3 (33...Ra5 34.b8Q Re5 35.Qe5 Kf7 36.Rb7 Kg6 37.Qf5) 34.b8Q (34.b8Q Rb3 35.Rb3 Kh7 36.Rb7) 1–0. Rush,Bradley – Huseby,Juan Carlos, OP–2012–0-02198, 2012.

4.Bh8 Nh6 5.Bg7 Ng8 (5...Nf5 6.Bh8+–) 6.e3 Qe7 7.Qh5 Kd8 (7...Qf7 8.Be2 Qg6 9.a3+–) 8.Qh7 c6 (8...Qf7+–) 9.Qg8 Kc7 10.Nf3 (better is 10.Qh8 f5+–) 10...Qd6 (10...d5 11.Nh4 Bd7 12.Qh8+–) 11.Bf6 b6 12.Be5 Bd2 13.Nbd2 Qe5 14.Ne5 Ba6 15.Ba6 Na6 16.Qa8 Nb8 17.Qa7 Kc8 (17...Kd6 18.Qb8 Ke7 19.Ne4 b5 20.Qd6 Ke8 21.Qd7 Kf8 22.Qf7) 18.Qb6 d6 (18...Na6 19.Rb1 Nb4 20.Rb4 d6 21.Qb8) 19.Nc6 (19.Rb1 de5 20.Qb8 Kd7 21.Rb7) 19...Nc6 20.Qc6 Kb8 (20...Kd8 21.Rb1 Ke7 22.Rb7 Kf6 23.Ne4 Kf5 24.Rg7 d5 25.Rg5 Ke4 26.Qe6) 21.Rb1 Ka7 22.Qb7 1–0. Fournier,Frederic (1975) – vicrey(C), Active, 2005.

5.Bh8 Kf7 6.Qh5 Kf8 7.Bd3 f5 8.Be2 Nd5 9.Qh6 Ke7 10.Qg5 Ke8 11.Bh5 (11...Kf8 12.Qd8) 1–0. Kuhn,Heinz (1675) – Weinz,Andre, GER Cup Amateur GrC 1st, 2000.

5.Bh8 Ng6 6.a3 Bf8 7.Qh5+–.

5.Bh8 Ng6 6.Qh5 Qe7 7.a3 Bd6+–.

5.e3 b6 6.Qh5 Ke7 7.Qh7 Kd6 8.c3 Bc5 (8...Ba5 9.Na3 Nce7 10.Nc4 Kc6 11.Nf3+–) 9.d4 Nge7 10.Nd2 Qg8 11.Ne4 Kd5 12.c4 1–0. Plock,Joerg (2120) – Lausch,Axel (1915), remoteschach.de, 2003.

5.e3 b6 6.Qh5 Kf8 7.a3 Bd6 8.Bd3+–.

5.e3 b6 6.Qh5 Kf8 7.Nf3 Qe7+–.

5.e3 Qe7 6.c3 Bd6 7.d4+–.

5.e4 Qe7+–.

5.c3 Ba5+–.

5.e3 Nh6 6.Qh5 Nf7 7.Qh7 Nc6 (7...d5 8.Bg7+–) 8.Qg8 Qf8 9.Qf8 Kf8 10.Bf6 e5 11.Nf3 d6 12.Bc4 Nh6 13.0-0 (13.c3 Ba5+–) 13...Bg4 14.Be2 (14.a3!? Bc5+–) 14...Kf7 (14...e4 15.a3 Ba5+–) 15.Bg5 Nf5 16.c3 Bc5 17.d4 (17.h3 Bf3 18.Bf3 Kg6+–) 17...Bb6 (17...ed4 18.cd4 Bf3 19.Bf3 Nfd4 20.ed4 Bd4 21.Na3 Ba1 22.Ra1+–) 18.Nbd2 Rg8 (18...Ba5 19.Rac1 Nfe7 20.e4+–) 19.h3 (better is 19.Bc4!? Kf8 20.Bg8 Kg8+–) 19...Bf3 20.Nf3 e4 (20...Kg6 21.Bd3 d5 22.e4 de4 23.Be4 ed4 24.g4+–) 21.h4 (better is 21.Bc4 Kf8 22.Bg8 Kg8+–) 21...ef3 22.Bf3 (22.Bc4 Kg7 23.Bg8 fg2 24.Kg2 Kg8+–) 22...Nce7 (22...Rh8 23.h5+–) 23.Be7 (better is 23.g4!? Ng7 24.Bb7 Ne6+–) 23...Ke7 24.g3 Nh4 25.Bb7 Nf5 26.c4 Kd7 27.Be4 Nh6 28.a4 c6 29.d5 cd5 30.Bd5 Rg7 31.a5 Bd8 32.a6 Bf6 (32...Bb6 33.Rfb1 Kc7 34.Rb3+–) 33.Rab1 Be5 (33...Kc8 34.Kg2 Re7 35.Rb3+–) 34.Rb7 Ke8 35.Rg7 Bg7 36.Rb1 Be5 37.Rb7 Nf5 38.Ra7 Ne7 39.Ra8 Kd7 40.a7 (40.a7 Bd4 41.ed4 Nc6 42.Bc6 Kc6 43.Rd8 Kb7 44.a8Q Kb6 45.Rb8 Kc7 46.Qb7) 1–0. Fournier,Frederic (1760) – omega06 (1660), chess16.com, 2008.

5.e4 d5 6.a3 Bd6 7.Nc3+–.

5.Nf3 Nh6 6.e3 (6.a3 Bd6 7.e4 Nc6+–) 6...Nf5 (6...Qf8 7.c3 Be7 8.Bf6 Qf6+–) 7.c3 Bd6 8.Bd3 h6 (8...Qf8 9.e4+–) 9.Qc2 (9.Bf5!? ef5 10.Nh4 Qf7+–) 9...Qh7 10.Bf6 Nc6 (10...Qg6 11.Be5 Qg2 12.Rg1 Qf3 13.Be4+–) 11.Bf5 ef5 12.0-0 b6 13.d4 Bb7 14.Be5 (14.Nh4 Kf7 15.Be5 Be5 16.de5 Ke6+–) 14...Be5 15.Ne5 Ne5 16.de5 0-0-0 17.Nd2 Qg7 18.g3 Qe5 19.Qd3 h5 20.f4 Qe6 21.Nf3 Qc6 22.Rad1 h4 23.c4 (better is 23.Qf5 hg3 24.hg3 Qc3+–) 23...h3 (23...hg3 24.hg3 (24.Qf5?! gh2 25.Kh1 Qc4+–) 24...Qc5 25.Rf2+–) 24.Qd5 (better is 24.Qf5!? Qc4 25.Rd7 Rd7 26.Qd7 Kd7 27.Ne5 Ke6 28.Nc4 Bg2+–) 24...Qa4 25.Qf5 (25.Qd4 Qa2 26.Rf2 Qb3+–) 25...Qa2?? (25...Bf3 26.Rc1 Bg2+–) 26.Rf2 (26.Nd2!? Bg2 27.Rf2 Qa3+–) 26...Qc4 27.Qh3 Qc5 (27...Qe4 28.Re1+–) 28.Re1 Re8 29.Nd4 Ba6 (29...Qd5 30.Rc2+–) 30.Rc2 Qd5 31.Qg2 Qg2 32.Kg2 c6 (32...c5 33.Nf5 Kc7 34.Rd2 Bb7 35.Kf2+–) 33.Kf2 Rh8 34.h4 Rg8 (34...Bd3 35.Rc3 Be4 36.Nb5+–) 35.Rec1 (better is 35.Ra2!? Bb7 36.Ra7 c5+–) 35...Bb7 36.Nf5 c5 (36...Kc7 37.Ra1 Ra8 38.g4+–) 37.Nd6 (better is 37.Ne7 Kd8 38.Ng8 Bd5+–) 37...Kc7 38.Nb7 Kb7 39.Ra1 a5 40.Ra4 (40.Rb1!? Kc7+–) 40...d5 41.Kf3 Rd8 42.g4 Kc6 43.g5 Kb5 44.Ra1 c4 45.Rb1 Kc5 46.h5 b5 47.h6 b4 48.Ra2 1–0. Fournier,Frederic (2015) – drikeknigth (1700), Active, 2004.

4.Bh8 Bc5 5.Bf6 (better is 5.d4 Be7 6.e3+–) 5...Qf6= 6.Nf3 Qa1 7.e3 d5 8.Be2 Nc6 9.0-0 Qg7 (9...Qa2 10.d4 Bb4 11.Qd3+=) 10.g3 (10.d4!? Bd6 11.c4=) 10...e5+= 11.Nc3 e4 (11...Bh3 12.Re1 e4 13.Nh4–/+) 12.Nh4 (12.Nd5!? Bd6 13.Nh4=) 12...Be6 13.Nb5 0-0-0 14.d4 Bd6 (better is 14...Be7!? 15.Ng2 a6–/+) 15.Nd6= Rd6 16.Qb1 b6 17.Qb5 Na5 18.Qa6 Kb8 19.Qb5 Nc4 20.Qe8 Kb7 21.Bc4 dc4 22.Rb1 Qg4 23.Qb5 Qe2 24.a4 Qc2 25.a5 c3 26.a6 Kb8 27.Qe8 Bc8 28.Qb5? (28.Rf1 Qb2 29.Nf5 Re6–+) 28...Qd2 29.Nf5 (29.Qf1 c2 30.Ra1 c5–+) 29...Re6 (29...Rf6!? 30.Rf1 c2 31.g4–+) 30.d5 (30.Rf1 c2 31.Qb2 Ba6 32.Qc1–+) 30...c2 31.Rf1 (31.de6 Ba6 (31...cb1R?! 32.Qb1 fe6 33.Ne7–+; 31...cb1Q?! 32.Qb1 fe6 33.Ne7–+; 31...cb1N?! 32.ef7 Nc3 33.Qe8 Qd1 34.Kg2 Qf3 35.Kg1 Qd1 36.Kg2 Qf3 37.Kg1 Qd1=; 31...cb1B?! 32.Qb1 fe6 33.Ne7–+) 32.ef7 Bb5 33.f8Q Kb7 34.Rb5 c1Q 35.Kg2 Qdd1 36.Nd6 cd6 37.Rb6 ab6 38.Qf7 Ka6–+) 31...Rf6 32.Ne7 (32.g4 c1Q 33.Rc1 Qc1 34.Kg2–+) 32...c1Q 33.Rc1 Qf2 34.Kh1 Qf3 35.Kg1 Qe3 36.Kh1 Qf3 (36...Qc1 37.Kg2 Qd2 38.Kh1 Qe1 39.Kg2 Rf2) 37.Kg1–+ Qf2 38.Kh1 Qf3 (38...Rh6 39.Qb6 ab6 40.a7 Ka8 41.h4 Qg3 42.Nf5 Bf5 43.Rc2 Rh4 44.Rh2 Rh2) 39.Kg1 Qe3 40.Kh1 Qc1 41.Kg2 Qd2 42.Kg1 (42.Kh1 Qe1 43.Kg2 Rf2) 42...Qf2 (42...Qe1 43.Kg2 Rf2) 43.Kh1 Qf1 (43...Qe1 44.Kg2 Rf2) 44.Qf1–+ Rf1 45.Kg2 Rf6 (45...Ba6 46.Nc6 Kb7 47.Nd8 Ka8 48.Nc6–+) 46.Nc6 Ka8 47.Ne7 (47.Nb4 e3 48.g4 e2–+) 47...Bg4 (47...e3 48.Nc8 e2 49.Kh3 e1Q 50.Nd6 Qe2 51.Nf7 Qh5 52.Kg2 Qf3 53.Kh3 Rf4 54.d6 Qf1) 48.h3 (48.Ng8 Rf5 49.Nh6 Bf3 50.Kf2 Rd5 51.Nf7 c5–+) 48...Bd7 (48...e3 49.hg4 e2 50.Nf5–+) 49.g4 (49.Ng8 Rd6 50.g4 Bb5–+) 49...b5 (better is 49...e3 50.Nf5 Bf5 51.Kf3 Bg4 52.Ke3 Bh3 53.Kd4–+) 50.Ng8 Rg6 51.Ne7 Rd6 52.Kf2 Kb8 53.Ke3 c5 54.Ke4 c4 55.Kd4 Kc7 56.Kc3 Kb6 57.Kb4 (57.Kb2 b4 58.Kc1 Ka6–+) 57...Rf6 58.Nf5 (58.d6 Rd6 59.Kc3 Rd3 60.Kb2 b4 61.h4 c3 62.Kb3 Kc5 63.Kc2 Rd2 64.Kc1 Ba4 65.Kb1 Bb3 66.g5 Rd1) 58...Bf5 59.gf5 Rf5 (59...Rf5 60.Kc3 Rd5 61.Kb2 f5 62.Kc2 f4 63.Kb1 f3 64.Kc1 f2 65.h4 f1Q 66.Kb2 Rd2 67.Kc3 Qd3 68.Kb4 Qb3) 0–1. Fournier,Frederic (1970) – pedropere, Active, 2005.

4.Bh8 d5 5.Nf3 Nc6 6.e3 Qe7 7.a3 Bd6 8.Nc3 Bd7 9.Nb5 a6 10.Nd6 cd6 11.c4 dc4 12.Bc4 d5 13.Be2 1–0. Fournier,Frederic (2295) – cptnNEMO, Active, 2007.

4.Bh8 Bd6 5.Nf3 Ba3 (5...b6+–) 6.Na3 b6 7.e3 Bb7 8.Be2 Nc6 9.0-0 Qe7 10.Nc4 0-0-0 11.Bf6 Qf6 12.a4 a5 13.d4 Qg6 14.Nce5 (14.Bd3!? f5+–) 14...Ne5 15.de5 Rg8 16.g3 h5 17.Qd3 Qg7 18.c4 f6 (18...Qg4 19.Nd2 Qh3 20.Bf3 Bf3 21.Nf3+–) 19.c5! fe5 (19...bc5 20.Qb5 Double attack (20.Qb5 Decoy)) 20.cb6 cb6 (20...e4 21.Qc2 d6 22.Nd2+–) 21.Rfc1 (better is 21.Qd6 Bc6 22.Ba6 Kd8 23.Ne5 Ke8 24.Nc6 Qf8+–) 21...Kb8 (21...Kd8 22.Qd6 Bf3 23.Bf3 Qf8 24.Qb6 Ke7+–) 22.Qd6 Ka7 23.Rc7 (23.Rab1 Ka8 24.Qb6 Qg3 25.fg3 Rg3 26.hg3 Bf3 27.Qa5) 23...Rc8 24.Rac1 (24.Rc8 Qg3 25.hg3 Bc8 26.Rb1 b5 27.Rb5 Bb7 28.Qb6 Ka8 29.Qb7) 24...Rc7+– 25.Rc7 Qg4 26.Qd3 e4 27.Qa6 Kb8 28.Qb7 1–0. Fournier,Frederic (1700) – fercosan (1730), Active, 2004.

4.Bh8 Qe7 5.c3 Bc5 6.d4 Bd6 (6...Bb6 7.Qd3+–) 7.Bf6 (7.e3 Ne4+–) 7...Qf6 8.e3 Nc6 9.Bd3 Qh6 10.Nf3 e5 (10...Be7 11.Qc2+–) 11.0-0 ed4 12.ed4 (12.Nd4?? Qh2) 12...Kd8 13.Qd2 (13.Re1 Bf4+–) 13...Bf4 14.Qb2 d5 15.Re1 Bg4 16.Nbd2 b6 17.c4 dc4 18.Bc4 f5 (18...Qf6+–) 19.d5 (better is 19.Re6 Qg7 20.Rc6 Bh3+–) 19...Ne7 (19...Ne5 20.Re5 Be5 21.Qe5 Bf3 22.Nf3 b5 23.Qh8 Ke7 24.Qa8 Kf7 25.d6 bc4 26.Qd5 Kg7 27.dc7 Qf6+–) 20.Qh8 Kd7 21.Qa8 Bd2 22.Re6 Qf4 23.Bb5 c6 24.Bc6 Nc6 (24...Kc7 25.Qb7 Kd8 26.Qd7) 25.Qc6 Kd8 26.Re8 1–0. Pommerel,Wim – Van Breda, CiF, 1989.

5.c3 Bc5 6.d4 Bf8 7.Nd2 Nc3 8.Qc2+–.

5.c4 d5+–.

6.c3 Ba3 7.Na3 1–0. Fournier,Frederic (1830) – artes, KasparovChess Playing Zone, 2002.

6.e3 Qg8 7.Qf3 Ke7 8.Qg3 Qh8 9.c3 Bd6 10.Qh4 Ke8 11.d4 Nc6 12.Nf3 b6 13.Nbd2 Be7 14.Qh6 d6 (14...Qg8 15.h4+–) 15.Bd3 Kd7 16.Qh7 (16.Qh7 Qh7 17.Bh7+–) 1–0. Van Rooijen,Peter – van Dijk,Edgar, C–2001–557 (FCV), 2001.

4.Bh8 Bc5 5.Bb2 Qf5 6.Nf3 1–0. Fournier,Frederic – bagoneta (1720), Active (5/0), 2004.

4.Bh8 Bc5 5.Nf3 Qf5 6.Bb2 b6 7.e3 Bb7 8.Be2 Nc6 9.d4 Bd6 10.Nbd2 (10.Bd3 Qg4+–) 10...0-0-0 (10...Nb4 11.Kf1+–) 11.c4 Nge7 (11...Qg6 12.Bf1+–) 12.a4 (12.c5!? bc5 13.e4 Qg6+–) 12...Na5 13.Bc3 Nec6 14.Ba5 Na5 15.Nb3 (15.Qb1!? Qb1 16.Rb1 c5+–) 15...Bf3 16.Bf3 Nc4 17.Qe2 Na5 (17...Bb4 18.Kd1 d5 19.e4+–) 18.Na5 (better is 18.g4 Qf6 19.Na5 Bb4 20.Kd1 Re8 21.Qa6 Kd8 22.Nb7 Ke7+–) 18...Qa5 19.Kf1 f5 20.g3 h5 (20...c6 21.Qc2+–) 21.Kg2 Rh8 22.h4 Bb4 23.Rhc1 d5 (23...Kd8 24.Qb2+–) 24.Qb5 Qb5 25.ab5 Kb7 26.Rc6 Rg8 (26...Bd6 27.Rc2 Kb8+–) 27.Re6 Rh8 28.Rf6 Bc3 29.Rc1 (29.Rc1 Bd2 30.Rc2+–) 1–0. Fournier,Frederic (1880) – cobralunar, Active, 2005.

4.Bh8 Nc6 5.Bc3 Bc5 6.Nf3 Qf5 7.e3 d5 8.d4 Bd6 9.Bd3 Qg4 10.0-0 Bd7 11.Ne5 Qd1 12.Rd1 Be5 (12...f5 13.Nd2+–) 13.de5 0-0-0 (13...h6 14.Nd2+–) 14.Bd4 (14.Bh7!? Nh6 15.Nd2 Ne7+–) 14...Nh6 15.Nd2 Rg8 (15...Nf5 16.Nf3+–) 16.g3 (better is 16.Bh7!? Rh8 17.Bd3 Ng4+–) 16...Ng4 17.c4 Rg5 (17...Nge5 18.Bh7 Rh8 19.cd5 ed5 20.Bb1+–) 18.cd5 ed5 19.Nf3 Rh5 20.h4 Nb4 (20...Nge5 21.Ne5 Ne5 22.Be5 Re5 23.Bh7+–) 21.Be2 Nc2 22.Rac1 Nd4 23.Nd4 (better is 23.ed4 Rf5+–) 23...c6 (23...Re5 24.Nf3 Rf5 25.Kg2+–) 24.Nb5 (24.e6 fe6 25.Bg4 Rh6+–) 24...a6 (24...Re5 25.Nd6 (worse is 25.Na7 Kb8 26.Bg4 Bg4+–) 25...Kc7 26.Nf7+–) 25.Nd6 Kc7 26.Nf7 Be6 27.Ng5 Rh6 (27...Rg5 28.hg5 Ne5 29.f4+–) 28.Ne6 Re6 29.Bg4 Re5 30.Kg2 b5 (30...Kd6 31.Rd2+–) 31.Bf3 (better is 31.f4 Re3 32.Rd5 Ra3+–) 31...a5 (31...Kb6 32.Rd4 h6 33.e4 de4 34.Re4 Re4 35.Be4+–) 32.Rd5 Rd5 33.Bd5 Kd6 34.Bc6 1–0. Fournier,Frederic (1720) – yakka, Active, 2008.

4.Bh8 d5 5.Nc3+–.

4.Bh8 Qf5 5.Bc3 Bc5 6.Nf3 h5 7.e3 Bd6 8.Bd3 c5 (8...Qc5+–) 9.Bf5 ef5 10.Nh4 Nf6 1–0. Fournier,Frederic – Ithorian,Guy, Active, 2005.

4.Bh8 Nf6 5.Nf3 Qc5 6.Bf6 (6.Bf6 Qf5 7.Bc3+–) 1–0. Bonetti,Shane – volkswagenbetle, ICC, 2002.

4.Bh8 Nf6 5.Nf3 Qf5 6.a3 Bc5 7.e3 d5 8.d4 Bb6 9.Bd3 Ne4 10.Be4 (10.Nbd2 Nd7+–) 10...de4 11.Nfd2 f6 (11...Nc6 12.Nc4+–) 12.Nc3 Ba5 13.Ne2 Qg6 (13...Kf7 14.Nf4+–) 14.Nf4 Qf7 15.Qh5 Bd2 (15...f5 16.Qf7 Kf7 17.0-0-0+–) 16.Kd2 Nd7 17.g4 (17.Ne6 Qh5 18.Ng7 Kf7 19.Nh5 b6+–) 17...Kf8 18.g5 Kg8 (18...Qh5 19.Nh5 f5 20.Rhb1+–) 19.Qf7 (19.Bf6 Qh5 20.Nh5 b6+–) 19...Kf7 20.gf6 b6 (20...Nf6 21.Rhg1 Ne8 22.Rg5+–) 21.Rhg1 Nf6 22.Rg7 Kf8 23.Rag1 e5 24.de5 Nd7 (24...Ne8 25.e6 Ng7 26.Rg7 Ke8+–) 25.Rg8 Ke7 26.R1g7 1–0. Trigance,Emile – Salinas,Marcelo, FICGS, 2012.

4.Bh8 Nf6 5.Nf3 Qg6 6.Bf6 Qf6 7.c3 Bc5 8.e3 Nc6 9.Be2 d5 10.0-0 b6 11.d4 Bd6 12.Nbd2 Bb7 13.e4 de4 14.Ne4 Qe7 15.Nd6 Qd6 16.Qd3 0-0-0 17.a4 e5 18.Qc4 (better is 18.Qf5!? Qd7 19.Qd7 Rd7 20.de5 Rd5+–) 18...ed4 19.cd4 Qg6 (19...Nd4 20.Nd4 Qd4 21.Qf7+–) 20.g3 (20.Rac1 Rd7 21.Rfd1 Na5+–) 20...Qe4 (20...Nd4 21.Nd4 Qe4+–) 21.Rfe1 (better is 21.Rac1+–) 21...Nd4+= 22.Nh4?? (better is 22.Kf1 Nf3 23.Qe4 Nd2 24.Kg2 Be4 25.f3+=) 22...Ne2 (22...Qh1) 23.Qe2 Qh1 0–1. Fournier,Frederic – CHICK197878, Partie evaluee, 1m + 2s, 2009.

4.Bh8 Nf6 5.Bf6 Qf6 6.c3 Nc6 7.e3 (< 7.cb4 Qa1 8.b5 Ne5+–) 7...Bc5 (7...d5 8.Qf3 Qf3 9.Nf3+–) 8.d4 Bb6 9.Nf3 e5 10.Nbd2 ed4 11.cd4 Nd4 (11...d5 12.Bd3+–) 12.ed4 Bd4 13.Nd4 Qd4 14.Rc1 Qe5 15.Be2 a5 (15...d5 16.Qc2+–) 16.0-0 b5 (16...Kd8+–) 17.Re1 Ra6 18.Bb5 Qe1 19.Qe1 Re6 20.Ne4 Ke7 21.Rc7 Kd8 22.Qa5 Re4 23.Rd7 (23...Ke8 24.Qd8) 1–0. Mehlhorn,Uwe – Abersfelder,Michael, remoteschach.de, 2003.

5.Nf3 Qh6 6.c3 Bc5 7.d4 Bd6 (7...Be7 8.Nbd2+–) 8.e4 Ne7 9.Nbd2 Qf8 (9...Nbc6 10.Nc4+–) 10.Bf6! Qf6 11.e5 Be5 12.Ne5 Nbc6 (12...d6 13.Ng4 Qg7 14.Qf3+–) 13.Qh5 Ng6 14.Ndf3 (14.Nc6 bc6 15.Qh7 Rb8+–) 14...d6 (14...Nce5 15.de5 Qg7 16.Bd3+–) 15.Ng4 (15.Nc6 bc6 16.Qh7 Qf7 17.Qf7 Kf7+–) 15...Qf4 (15...Qf5 16.Qf5 ef5 17.Nf6 Kf8 18.Kd2+–) 16.Bd3 Nce7 17.0-0 (17.Ng5!? e5 18.Bg6 Ng6 19.Nh7 Qf5 20.Nhf6 Kd8+–) 17...Bd7 18.Qg5 (18.h3!? 0-0-0+–) 18...0-0-0 19.Qf4 (19.Rfe1!? Rf8+–) 19...Nf4 20.Bh7 Ne2 21.Kh1 Rh8 22.Bd3 Nc3 23.Rfc1 Ncd5 24.Kg1 (24.Rab1 e5 25.Ne3 ed4 26.Nd5 Nd5 27.Nd4 b6+–) 24...e5 25.Ne3 Nf4 26.Bf1 Rg8 27.g3 (27.de5?! Nh3 28.Kh1 Nf2 29.Kg1 Nh3 30.Kh1 Nf2 31.Kg1 Nh3 32.Kh1 Nf2=) 27...e4 28.Nh4 (28.Nd2 Bc6+–) 28...Nc6 29.Rd1 Nb4 (29...Ne7 30.f3 Bc6 31.fe4 Be4 32.Rd2+–) 30.a3 Nbd3 (30...Nbd5 31.Nd5 Nd5 32.Bc4+–) 31.Bd3 (better is 31.f3!? d5 32.Nd5 Nd5 33.fe4 Ne3 34.Rd3 Nf1 35.Kf1 Bb5+–) 31...ed3 1–0. Atamer,T (1935) – Ozkahya,Emiray, Turkish Cup, 2015.

4.Bh8 Qe7 5.e4 e5 6.Qh5 Nc6 7.Qh6 f6 8.Be2 Na5 9.Bf6 Qd6 10.Bh5 1–0. pcmvr (1700) – edonaghy, net–chess.com, 2005.

4.Bh8 f6 5.c3 Bf8 6.e4+–.

4.Bh8 f6 5.Nf3 Kf7 6.Bf6! Qf6 (6...Qf6 7.c3 Combination; 6...Kf6 7.e3 Combination) 7.c3 Bc5 8.e3 Nf5 9.Be2 Nc6 10.d4 Bd6 (10...Be7 11.e4 Nh4 12.e5+–) 11.Nbd2 b6 (11...Be7 12.e4 Ng7 13.Bb5+–) 12.Ne4 Qe7 13.Nd6 Qd6 14.g3 h5 (14...Bb7 15.e4 Nfe7 16.Nd2+–) 15.Bd3 Bb7 16.Bf5 ef5 17.0-0 Ne7 18.Ne5 Kf6 19.Qh5 Ke6 (19...Kg7 20.Qf7 Kh6 21.g4 fg4 22.Ng4 Kg5 23.f3+–) 20.c4 (20.Qf7) 20...c5 (20...Rf8+–) 21.Qf7 1–0. Fournier,Frederic – solrac80, Active, 2007.

3.a3 a6 4.e4 d6 5.c4 c6 6.d3 Bb7 (6...Nf6 7.Nc3=) 7.c5 (7.Nc3 Nf6=) 7...dc5= 8.bc5 Bc5 (better 8...Nd7!? 9.d4 e5 10.de5 Nc5=+) 9.Bg7+– Bd4 10.Bh8 Bh8 11.Ra2 Bd4 (11...Nd7 12.Be2+–) 12.Nf3 Bg7 13.Be2 Qa5 14.Qd2 (14.Nbd2 c5+–) 14...Qd2 15.Nbd2 Nd7 16.Nb3 Rd8 17.d4 White plans e5 (better 17.0-0+–) 17...Nb6? (better 17...c5+=) 18.Nc5+– Bc8 19.e5 Nd5 20.Bd3 h6 21.Be4 (21.Kd2 Nge7+–) 21...Nge7 22.Rc2 f5 23.Bd5 Nd5 24.g3 Bd7 (24...Nb6 25.Ke2+–) 25.Na6 (better 25.Ke2!? a5+–) 25...Ra8+– 26.Nc5 Ra3 27.Ke2 Nc3 28.Kd2 (28.Rc3 Rc3 29.Ra1 Rc5 30.dc5 Bf8+–) 28...Nd5 29.Ke2 (29.Nh4 Bf8+–) 29...Ke7?? (29...Nc3 30.Rc3 Rc3+–) 30.Rhc1+– Kd8 (30...Be8 31.Nd2+–) 31.Nh4 (31.Nd7 Kd7 32.Rc6 Bf8+–) 31...Ne7 (31...b4 32.Nd7 Kd7 33.Rc6 Nc3 34.R1c3 bc3 35.Rd6 Ke7 36.Kd3+–) 32.Rb2 (32.Ng2 Nd5+–) 32...Nd5 33.Nb3 (33.Nb7 Ke8+–) 33...h5 (33...Bf8 34.f4+–) 34.Ng6+– Ra4 35.Ra1 (35.f4 Ke8+–) 35...Bh6 (better 35...Ra1!? 36.Na1 c5+–) 36.Ra4+– Nc3 37.Kd3 Na4 38.Ra2 Ke8 (38...Be8 39.Nf4 Bf4 40.gf4+–) 39.Nc5 Nc5 40.dc5 Kf7 41.Ra7 Kg6 (41...Ke8 42.Nh8+–) 42.Rd7 Bc1 (42...f4 43.Ke4 Bf8 44.Kd4 fg3 45.hg3+–) 43.Rd6 (43.Re7 f4 44.Ke4 fg3 45.hg3 b4+–) 43...Kf7 44.Rc6 Ba3 (44...Bb2 45.f4 h4 46.Rd6+–) 45.Rc7 (45.Rc8 Ke7 46.c6 Bd6 47.Re8 Ke8 48.ed6 f4+–) 45...Kg6 (45...Ke8 46.c6 Kd8 47.Rd7 Kc8+–) 46.c6 (46.c6 Bb2 47.Re7 Be5 48.Re6 Bf6 49.c7 Kg5 50.c8Q Bh8 51.Qg8 Bg7 52.Qg7) 1–0. petrobbo (1965) – WILRUS (2110), ChessWorld.net, 2011.

3.a3 c6 4.Nf3 d5 5.e3 Nf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 b5).

3.a3 f6 4.e4 c6 5.Nf3 e5 6.Nh4 Nh6 7.c4 g6 8.cb5 f5 9.Nf3 Bd6 10.Ne5 cb5 11.Ng4 (11...Ng4 12.Bh8+–) 1–0. Wall,Bill (2365) – MajCoffee (2335), Microsoft Gaming Zone, 1999.

3.a3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b5).

3.a4 c6 4.Ra3 Nf6 5.h4 Bb4 6.h5? Ba3–+ 7.Na3 h6 8.Qa1 ba4 9.g4 d5 10.g5 hg5 11.h6 Nbd7 12.Nf3 Rh6 13.Rg1 g4 14.Ne5 Ne5 15.Be5 Rg6 16.e3 c5 17.Nb5 Ne4?? 18.Bg7?? Qh4 19.Rg2 Bd7 20.Nc7 Ke7 21.Na8 g3 22.f3–/+ Ng5 23.f4 Nf3–+ 24.Ke2 Nh2 25.Be5? Bb5 26.d3?? Qg4 27.Kd2 Qf3 28.Qe1 Nf1 29.Kc1 Ne3 30.Re2 g2 31.Rg2 Ng2 32.Qd2 Qe3 33.Qe3 Ne3 34.Nc7 Bd7 35.Na6 Nf5 36.Nc5 Rg2 37.Na4 Ne3 38.Nc3 Rc2 39.Kb1 d4! (39...d4 40.Bd4 a5–+) 0–1. xtom – callman (1630), kurnik, 2011.

3.c3 a5 4.e3=.

3.c3 Bb7 4.Qc2 Nc6 5.Ba3 g6 6.e3 Ne5 7.Bd3?? Nd3–+ 8.Qd3 Bg2 9.h3 Bh1 10.c4 bc4 11.Qc4 Bg7 12.Nc3 Bb7 13.Qb5 Bc3 14.dc3 Rb8 15.c4 c6 16.Qa4 a6 17.Rd1 d5 18.c5 Nf6 19.b5 cb5 20.Qb4 Nd7 21.Nf3 Bc6 22.Nd4 Rc8 23.Nb5 Rg8 24.Nd6 Ke7 25.Nc8 Qc8 26.h4 Qb8 27.Qc3 Qh2 28.Qd2 Qh4 29.Bb2 Bb5 30.c6 Qh1# 0–1. soraya – ajeffries (1840), net–chess.com, 2008.

3.c3 c6 4.e4 e5 5.Qf3 Nh6 6.Bc1 c5 7.d3 g6? 8.a3 Nc6 9.Bh6 Bh6= 10.d4 c4 11.Qh3 Qg5–/+ 12.Nf3?? Qc1–+ 13.Ke2 Qb2 14.Nfd2 Bd2 15.Nd2 Qa1 16.d5 Nd4! 17.Ke3 Qc3 18.Bd3 Qd3# 0–1. Pekin Dragons – sr25sulu, ChessWorld.net, 2011.

3.c3 Ne7 4.a4 ba4 5.Ra4 Bb7 6.e3 a6 7.Nf3 h5 8.d4 Rh6 9.Bd3 Nbc6 10.0-0 Ng6 11.Nbd2 e5 (11...Be7!?+/–) 12.Bg6+– Rg6 13.d5 (13.de5?! Ne5 14.e4 Nd3+=) 13...Nb8 14.Ne5 Rg5 (14...Rg2 15.Kg2 Qg5 16.Kh1 Qe5 17.e4+–) 15.f4 Rg6? (15...Re5 16.fe5 Bd5 17.Qh5 Nc6+–) 16.Ng6 fg6 17.Qb1 c6 (17...Qf6+–) 18.Qg6 Ke7 19.d6 1–0. Wall,Bill – Tartaric, internet, 2002.

3.e3 Bb4?? 4.Bg7 f6 5.Qh5 Ke7 6.Bh8 Qe8 (6...h6 7.Qg4 Nc6 8.Bb5+–) 7.Qh7 Qf7 8.Qh4 (better is 8.Qe4 Nc6 9.Bb5 Rb8 10.Bc6 dc6+–) 8...Bb7 (8...Bd6+–) 9.Qb4 d6 (9...Ke8 10.Nc3 a6 11.Qh4+–) 10.Qb5 Bc6 11.Qa5 Kd7 12.Bb5 (better is 12.Qc3 Qg6 13.e4 Be4+–) 12...Bb5 (12...Qh7 13.Bf6! Nf6 14.Na3+–) 13.Qb5 Nc6 14.Nf3 Nh6 (14...Nge7 15.Bf6! Qf6+–) 15.Nd4 Rh8 16.Qc6 Kc8 17.Qa8 (17.Qa8 Kd7 18.Qh8+–) 1–0. GuestTQVC – GuestTUBH, freechess.org, 2017.

3.e3 Nc6 4.a4 ba4 (4...Bb7 5.ab5 Nb4 6.Nf3=) 5.b5+= Nce7 6.Nf3 c6 7.c4 (worse is 7.Ra4 cb5 8.Bb5 Rb8=) 7...cb5 8.cb5 Bb7 9.Be2 Nd5 10.0-0 Ngf6 (10...a6 11.ba6 Ba6 12.Ba6 Ra6 13.Ra4 Ra4 14.Qa4+=) 11.Qa4 Be7 12.Qd4 (12.Rc1 0-0+=) 12...Qb6 13.Qc4 Rc8 (13...a6 14.ba6 Qb2 15.ab7 Qb7 16.Ra8 Qa8 17.Rc1=) 14.Qa4 Ra8 15.Bd4 Qd8 16.Nc3 (16.Ba7?! Bc5 17.Bc5 Ra4 18.Ra4 d6=) 16...Nc3 17.dc3 0-0 18.Ne5 (18.Rfd1 Qc8+=) 18...Nd5 19.c4 (19.Qc2 d6 20.Nf3 Qc7+=) 19...Nb6 20.Qc2 White intends c5 20...Bf6 (20...d6!? 21.Nc6 Bc6 22.bc6 Qc7+=) 21.c5+/– Nd5 22.Bd3 g6 23.c6 (23.Rfd1 Qc7 24.Qb2 Be5 25.Be5 Qc5+–) 23...Bc8 (23...dc6!? 24.bc6 Bc8+/–) 24.Be4 Be5 25.Be5 f6? (better is 25...dc6 26.Qc6 Bd7+–) 26.c7 Qe7 27.Bd4 (27.Bd5 ed5 28.Bd4 a6+–) 27...f5 (27...Bb7 28.Bd5 Bd5 29.Ra7+–) 28.Bd5 ed5 29.Ba7 Ra7 (29...d6+–) 30.Ra7 d6 (30...f4 31.Qb3 Qc5 32.b6 fe3 33.fe3+–) 31.b6 1–0. DEFFM – GuestCCJN, freechess.org, 2018.

3.e3 d6 4.Bb5 c6 5.Be2 a6 (5...e5 6.Nf3+/–) 6.a4 (6.Nf3 Nf6+/–) 6...e5 7.b5 (7.Nf3 e4 8.Nd4 c5 9.bc5 dc5+/–) 7...Qb6 (7...Qg5!?+/–) 8.a5+– Qb7 9.b6 Nd7 10.Nf3 (10.d4 Ngf6+/–) 10...h6 (10...Rb8 11.0-0+–) 11.0-0+– Ngf6 12.d4 e4 13.Nfd2 d5 14.c4 g6 (14...Rb8 15.Nc3+–) 15.cd5 (15.Ba3 Ba3 16.Na3 Rb8+–) 15...cd5 16.Qb3 (16.Ba3 Rb8+–) 16...Be7 (16...Nb8 17.Rc1 Nc6 18.Nc3+–) 17.Ba3 (17.Rc1 Rb8+–) 17...Ba3 18.Qa3 Kd8 (18...Qb8 19.Rc1+–) 19.Rc1 Qb8 20.Rc7 1–0. DEFFM – GuestHFJJ, freechess.org, 2018.

3.e3 f6 4.Bb5 Bb4 5.Qh5 (5.Qg4 Qe7+=) 5...g6 6.Qh4 Qe7 (6...Be7 7.Nf3+=) 7.Ne2 (better is 7.Bd3+/–) 7...Qc5? (better is 7...Ba6!? 8.Nbc3 Bb5 9.Nb5 d5+=) 8.Bd3 (better is 8.Bf6 Nf6 9.Qf6+–) 8...Nc6? (better is 8...g5 9.Qh5 Ke7+/–) 9.Bg6!+– Kd8 (9...hg6 10.Qg3 Double attack (10.Qh8 Pinning; 10.Qh8 Deflection; 10.Qg3 Decoy)) 10.Bf6 Nf6 (10...Nge7 11.Qh6 Bb7+–) 11.Qf6 Ne7 (11...Qe7 12.Qh8 Qf8 13.Qf8 Bf8 14.Bh7+–) 12.Qh8 Ng8 13.Qg8 Ke7 14.Qh7 (better is 14.Qf7 Kd6 15.Be4 c6+–) 14...Kd6 15.0-0 (15.c3 Ba5+–) 15...c6 16.d4 Qg5 17.a3 Ba5 18.Nbc3 Bb7 19.Ne4 Kc7 20.Ng5 c5 21.Ne6 (21.Ne6 Kd6 22.dc5 Kc6 23.Be4 Kb5 24.Qd7 Bc6 25.Qc6 Kc4 26.Bd5) 1–0. DEFFM – GuestGkgkg, freechess.org, 2018.

3.e4 Bb4?? 4.Bg7+– Bb7 5.Bh8 Be4 6.Bb5 Bg2 7.Qg4 Bh1 8.Qg8 Bf8 9.Bg7 Qe7 10.f3 h5 11.Nc3 c6 12.Bd3 d5 13.Bf8 Qf8 14.Qf8 Kf8 15.0-0-0 Nd7 16.Ba6 Ne5 17.Be2 d4 18.f4 Nd7 19.Nf3 f5?? 20.Nd4+– Nc5 21.Rh1 h4 22.Nc6 Ke8 23.Bh5 Kd7 24.Ne5 Kd6 25.Nb5 Ke7 26.Nc6 Kf6 27.Nc7 Kg7 28.Na8 1–0. MARYMARY – The Monopoly Guy, ChessWorld.net, 2011.

3.e4 Bb7 4.a3 Nf6 (4...a5 5.f3=) 5.Bb5 Ne4 6.Qe2?? (6.Nf3 a5=) 6...f5?? (better is 6...Nc3! 7.Bc3 Bg2 8.Bg7 Bg7–+) 7.Nh3 (7.Qh5 g6 8.Qe2 Rg8+=) 7...c6 (7...Qh4 8.0-0=) 8.Qh5 g6 9.Qd1 cb5 (9...e5!? 10.Bd3 d6+=) 10.Bh8+/– Qb6 (10...Ng5!? 11.Ng5 Qg5+/–) 11.0-0+– Bd6? (better is 11...Be7+–) 12.d3 Bc7 (12...Nf2 13.Rf2 Qc7+–) 13.de4 fe4 14.Nc3 (14.Ng5 e3 15.Nh7 ef2 16.Kh1 Nc6+–) 14...Qc6 (14...d5 15.Bd4 Qd6 16.f4 ef3 17.g3 f2 18.Rf2+–) 15.Ng5 e3 16.Nge4 d5 17.Nf6 Kf7 (17...Ke7 18.a4 Bb6 19.Ng8 Kf8 20.ab5 ef2 21.Kh1 Qc8+–) 18.fe3 Na6 (18...Ke7 19.Ng8 Ke8+–) 19.Qd4 Rh8 (19...Bd6 20.Nfe4 Ke8+–) 20.Nfd5 Ke8 21.Qh8 Kd7 22.Rf7 Kd6 23.Ne4 Kd5 24.Qd4 1–0. wiking – kre, internet, 2009.

3.e4 d6 4.Nf3 e5 5.Bb5 c6 6.Ba4 Bd7 7.0-0 h6 8.Bb3 Qc8 9.d4 Bg4 10.Qd3 Be6 11.de5 Bb3 12.Qb3 Qe6 13.ed6 Qb3 14.cb3 Bd6 15.Bg7 Rh7 16.Bd4 f6 17.Re1 Re7 18.Nh4 Kf7 19.Re3 Bf4 20.Rf3 Be5 21.Nf5 Bd4 22.Nd4 a6 23.Nd2 Re5 24.Re1 Ne7 25.Nc4 Rg5 26.Nd6 Kg6 27.Ne8 Nd7 28.Nc7 Ra7 29.Nce6 Re5 30.Rg3 Rg5 31.Ng5 hg5 32.Ne6 Ne5 33.f4 Nf7 34.e5 f5 35.fg5 f4 36.Nf4 Kg7 37.Ne6 Kg6 38.Rf3 Ng5 39.Rg3 Nd5 40.Rg5 Kh7 41.Re4 Kh8 42.Nf8 Ne7 43.Rh4 Black king mated 1–0. Crusader Rabbit (1685) – Tony _ R, ChessWorld.net, 2020.

3.e4 Nf6 4.Nc3 c6 5.Be2 Be7 6.a3 0-0 7.Nf3 Bb7 8.0-0 d6 9.Bd3 Nbd7 10.Re1 Nb6 11.Ne2 e5 12.Ng3 Nc4 13.Bc3 a6 14.Bc4 bc4 15.d4 ed4 16.Qd4 d5 17.Nf5 Qc7 18.e5 Ne4 19.e6 fe6 20.Qg7 Black king mated 1–0. Crusader Rabbit (1790) – mike1745, ChessWorld.net, 2018.

3.e4 Qh4 4.Qf3 Nf6 5.e5 Qe4 (5...Nd5 6.Bb5 Qb4 7.Qb3 Qe4 8.Kf1+=) 6.Be2+= Qf3 7.Bf3 Nd5 8.Bd5 ed5 9.Nc3 c6 10.a3 d6 11.Nf3 Bf5 (11...Bg4 12.d4+=) 12.0-0-0 (better is 12.Nd4 Bg4 13.h3 de5 14.Ndb5 cb5 15.hg4+=) 12...d4?? (better is 12...de5 13.Ne5 a5+=) 13.Nd4+/– Bg4 Black fights for the Initiative 14.f3 de5 15.Nc6 (better is 15.Rhe1!? Kd7 16.Re5+– (16.fg4?! ed4 17.Ne4 d3+=)) 15...Nc6+= 16.Nb5 The passed pawn on c2 will quickly become a dangerous weapon (16.fg4 a5 17.Nb5+–) 16...Rb8= 17.Na7 The passed pawn on b4 quickly leads to threats 17...Na7 18.Be5? (better is 18.fg4!? Bd6 19.c4=) 18...Rb5–/+ 19.Rhe1 Be6 20.c4 Rb7 (20...Bc4 21.Bg7 Theme: Double Attack) 21.f4 f6 (21...Kd7 22.d3–/+) 22.Bd4 (22.Bf6 Kd7 23.Be5 Bc4 24.d3–+) 22...Kf7 23.Re3? (better is 23.d3–/+) 23...Nc6–+ 24.Bb2 Bd6 (24...Bc4 25.d3 Bd5 26.g4–+) 25.Rde1 (25.b5 Na5 26.d3 Bf4–+) 25...Re8 (better is 25...Bc4!? 26.d3 Bd5–+) 26.g3 h6 27.b5 Nd8 28.a4 g5 (28...Rbe7!? 29.d3 Ra7–+) 29.fg5 hg5 30.a5 Bc4?? (better is 30...Ra7 31.Bc3 Nb7–/+) 31.Re8+– Bb5?? (31...Ne6 32.d3 Bd5+/–) 32.Rd8 Bc7 33.Rd5 (better is 33.Ra8!? g4+–) 33...Ba5 34.Rd6 Rc7 35.Kb1 Rc6 36.Rc6 (36.Rd7 Kg6+–) 36...Bc6 37.Rf1 Be4 38.Kc1 f5 39.g4 f4 40.h4 gh4?? (40...Bd3 41.Rf3 Be2+–) 41.Rf4 (41.Rf4 Ke6 42.Re4 Kd7 43.g5+–) 1–0. Wall,Bill – Flores,Tom, Mt View CA, 1988.

3.Nf3 Bb4?? 4.Bg7+– Nf6 5.Bh8 Nc6 6.c3 Bd6 7.Bf6 Qf6 8.e3 Ne5 9.Be2 Ba6 10.d4 Ng4 11.h3 Nh6 12.a4 Qg6 13.ab5 Bb7 14.Rg1 0-0-0 (14...c6 15.Ne5 Qf6 16.bc6 dc6 17.Qb3+–) 15.Ra7 Qe4 (15...Bd5 16.Bd3 f5 17.Qa4+–) 16.Qa4 (better is 16.Bd3 Qd5 17.e4+–) 16...Nf5 (16...Qb1 17.Kd2 Qb2 18.Kd3 c6+–) 17.Bd3 Qd5 18.c4 1–0. Kappel,Ray – Holmquist,Marson, 2011 SB–1 Lechenicher SchachServer, 2011.

3.Nf3 Nc6 4.a3 Bb7 5.e3 Nf6 6.Bb5 a5 7.c3 ab4 8.ab4 Ra1 9.Ba1 Na7 10.Be2 g6 11.0-0 Bg7 12.d4 0-0 13.Nbd2 Nc8 14.c4 Nd6 15.Bc3 Nfe4 16.Ne4 Ne4 17.Bb2 Qe7 18.c5 Bd5 19.Qc2 c6 20.Ra1 Rb8 21.Bc3 Ng5? 22.Ng5+– Qg5 23.e4 Be4 24.Qe4 f5 25.Qf3 h5 26.Ra7 Bd4 27.Bd4 Rb4 28.Be3 f4 29.Bd2 Rb1 30.Bf1 Qc5 31.Ra8 (31.Ra8 Kg7 32.Qf4+–) 1–0. Fournier,Frederic (1885) – Mansard Williams, Coupe, 2006.

3.Nf3 d5 (--> 1.b4 d5 2.Bb2 e6 3.Nf3 b5).

3.Nf3 g6?? 4.Bh8+– f6 (4...Bb4 5.e4 Bb7 6.Bb5 Be4 7.Nc3 Bf3 8.Qf3+– (worse is 8.gf3 a6 9.Be2 d5+–)) 5.e4 d6 (5...Nh6 6.e5 fe5 7.Be5+–) 6.Bb5 c6 7.Be2 (better is 7.Ba4 Bd7 8.d4 Nh6+–) 7...Nh6 8.0-0 Nf7 9.Bf6! Qf6 10.c3 Bh6 11.d4 e5 12.a4 Ng5 13.Nbd2 Nd7 14.Ng5 Qg5 15.Nf3 Qg4 (15...Qf4 16.Bd3+–) 16.Ne5 Qe4 17.Bf3 Qh4 18.Nc6 Nf6 (18...Kf8 19.Qb3 Nf6 20.Nd8+–) 19.Re1 (19.Qe2 Ne4 20.Be4 Kf8+–) 19...Kf8 20.Qe2 Kg8 (20...Ne4 21.Be4 Bb7 22.Bd5+–) 21.Ne7 Kh8 22.Ba8 Bg4 23.f3 1–0. Crazy_chess – Flab, playchess.de, 2001.

3.g3 a5 4.Bg2 d5 5.e4 (5.ba5 Nf6=) 5...Bb7 (5...ab4 6.Qe2 de4 7.Be4–/+) 6.ed5 (6.ba5 de4 7.Nc3 Nf6 8.Nb5 Ra5+=) 6...Bd5–/+ (6...ed5?! 7.ba5 Ra5 8.Ne2=) 7.Bd5 (7.Nf3 ab4 8.0-0 Ra2 (worse is 8...Ba2 9.Ne5 Ra6 10.Qh5=) 9.Ra2 Ba2–/+) 7...Qd5 (7...ed5?! 8.Qe2 Qe7 9.a4 ab4 10.ab5 Ra1 11.Ba1=) 8.Nf3 f6 (better is 8...ab4!? 9.0-0 Ra2 10.Ra2 Qa2–/+) 9.Nc3= Qd7 10.Qe2 (10.a4 ab4 11.Nb5 Ne7=) 10...c6 (10...ab4 11.Nb5 c6 12.Nbd4=) 11.0-0 (11.ba5 b4 12.Na4 Ra5+=) 11...Bb4 (11...ab4 12.Nd1–/+) 12.Rfe1+= White gets the initiative 12...Ne7 (12...Kf7 13.Ne4 Qd5 14.a3+=) 13.Qe6= Qe6 (13...Na6 14.Qe2=) 14.Re6 0-0 (14...Kd7 15.Rae1=) 15.a3+= Bc3 16.Bc3 a4?? (better is 16...Nd5+=) 17.Re7+– Na6 (17...Rf7 18.Re8 Rf8 19.Re6+–) 18.Ng5 (better is 18.Nd4 Rac8+–) 18...Rfe8 19.Rae1 (better is 19.Re8!? Re8 20.Nf3 Nc7+–) 19...Re7 20.Re7 h6?? (better is 20...fg5 21.Rg7 Kf8 22.Rh7 Re8+–) 21.Ne6 c5 (21...Kh8+–) 22.Rg7 Kh8 23.Bf6 b4 (23...Rb8 24.Nf4 b4 25.Ng6) 24.Nf4 b3 25.Ng6 1–0. Robinson,E – Shull,D, Flint ch–MI class–C, 1992.

3.g3 Bb7 4.Nf3 Bf3 5.ef3 a6 (5...Bb4?? 6.Bg7 Be7 7.Bh8+–) 6.Bg2 Bb4?? (6...Nf6 7.a4=) 7.a3 (better is 7.Bg7 Be7 8.Bh8+–) 7...Bf8–/+ 8.0-0 Nf6 9.d3 Bd6 10.Nd2 c6 11.Ne4 Ne4 (11...Be7!?–/+) 12.fe4 0-0 13.Qg4 f6 14.f4 e5 15.f5 Qa5 16.Rad1? (better is 16.c3!?+=) 16...Ba3–+ 17.Ba1 Qa4 18.Rd2 Bb4 19.Re2 Bc5 20.Kh1 Bd4 21.Bd4 (21.c3 Bb6 22.Bb2–+) 21...Qd4 (21...ed4 22.e5 fe5 23.f6=) 22.Qh5 a5 23.g4 g5 (better is 23...a4–+) 24.fg6+– hg6 25.Qg6 (25.Qg6 Kh8 26.Ref2 Qa7 27.Rf5 Qg1 28.Kg1 Rf7 29.Rh5 Rh7 30.Rh7) 1–0. Salvatore – Daz101, ChessWorld.net, 2012.

4.ba5 Ra5 5.e3 c6 6.c4 bc4 7.Bc4 Nf6 8.Nf3 Be7 9.0-0 d5 10.Be2 Nbd7 11.Qc2 c5 12.Rc1 0-0 13.d3 Ra8 14.a4 Ba6 15.Na3 Qc7 16.Nb5 Qb6 17.d4 c4 18.Bc3 (better is 18.Nc3!?=) 18...Bb5–/+ 19.ab5 Qb5 20.Rcb1 Ra1 1–0. madik – irade92, gameknot.com, 2009.

4.e4 c6 5.d4 (better 5.Nf3!?=) 5...ab4–/+ 6.ab4 Ra1 7.Ba1 Bb4 8.c3 Ba5 9.Bd3 d6 10.Ne2 c5 (10...Nf6 11.0-0–/+) 11.0-0 (11.Bb5!? Bd7 12.Bd3=) 11...c4=+ 12.Bc2 Nf6 13.Na3 Bd7 14.Qd2 (14.Qb1 Qb6=+) 14...0-0 15.Rb1 Attacking the backward pawn on b5 15...e5 (15...Bc6!?=+) 16.Nb5= Bc6 (16...Qb6 17.Na3 Qc7 18.Ng3=) 17.d5 (17.Ng3 Na6+–) 17...Bb5= 18.Rb5 Nbd7 19.g3 (19.Ng3 Bb6+=) 19...Nc5 (19...Bb6!? 20.h3 Qa8=+) 20.f3 Qc7 21.Qd1 Rb8 22.Qb1 Rb5 23.Qb5 g5 (23...Nd3 A) worse 24.Bd3 Qb6 25.Nd4 cd3 (worse 25...ed4 26.Qc4 dc3 27.Kf1+–) 26.Qd3 ed4 27.cd4 Ne8–/+; B) 24.Kf1=) 24.g4 (24.Qc4 g4 25.f4 Nce4 26.Qc7 Bc7=) 24...Qb6 25.Qb6 (25.Qc4? Nce4 26.Nd4 ed4 27.Be4 d3 28.Kg2 Qb1 (28...Ne4?! 29.Qe4 Qb1 30.Qa4 Qc2 31.Qc2 dc2 32.Bb2–+) 29.Qd3 Qa1–+) 25...Bb6 26.Kf1 h5 27.h3 (27.gh5 g4 28.fg4 Ng4=) 27...hg4 (27...h4 28.Ke1=) 28.hg4 Ne8 29.Nc1 Nc7 30.Ke2 Ba5 31.Kd2 Nb5 32.Bb2 f6 (32...Kf8 33.Bd1=) 33.Na2 (better 33.Bd1=) 33...Nb3 (better 33...Nd4! 34.Bd1 Kf7=) 34.Bb3+– cb3 35.Nc1 Nd4 36.Ke3 Nc2 37.Ke2 Bb6 38.Nb3 Kf7 39.Bc1 Ke7 40.Nd2 Ne3 41.Kd3 Ng2 42.Nc4 Bc5 43.Ba3 Ba3 44.Na3 Nh4 45.Ke2 Ng6 46.Nb5 Kd7 47.Na7 Ne7 48.Kd3 Kc7 49.Nb5 Kd7 50.c4 Nc8 51.Kc3 (51.Kc2 Ne7+–) 51...Nb6 (51...Ne7 52.Kc2+–) 52.Kb4+– Ke7? (better 52...Nc8+–) 53.Nd6 Nd5 54.ed5 (54.cd5 Kd6) 54...Kd6 55.Kb5 Kc7 56.c5 (56.c5 Kd7 57.Kb6+–) 1–0. petrobbo (2035) – joynme (1975), ChessWorld.net, 2013.

4.e3 a6 5.Nf3 a5 6.ba5 (6.Bb5 ab4 7.ab4 Ra1 8.Ba1 Nf6+/–) 6...Ra5 (6...c6 7.c4+=) 7.Bc3+/– b4 8.ab4 Ra1 9.Ba1 c5 (9...Nf6 10.b5+/–) 10.bc5 Qa5 11.Be5 (11.Bd4 f6+/–) 11...Bf3 (11...Nc6 12.Bd6+/–) 12.Qf3 d6?? (better is 12...Nc6 13.Bc3 Qc5+/–) 13.Qb7+– (13.Bd6?! Bd6 14.cd6 Qb4+–) 13...Nd7 (13...de5 14.Bb5 Kd8 15.Qb8 Ke7+–) 14.Bb5 (14.Bb5 Qd8 15.Bd7 Qd7 16.c6 Qb7 17.cb7 de5 18.b8Q Ke7 19.Qe5+–) 1–0. Wall,Bill – Abusch, internet, 2001.

4.e3 a6 5.Nf3 Nf6 6.c4 bc4 7.Bc4=.

4.e3 a6 5.Nf3 h6 6.c4+= bc4 7.Bc4 d5 (7...Nf6 8.0-0+=) 8.Be2 Nf6 9.Nc3 (9.Qc2 Nbd7+=) 9...Be7 (9...c5 10.bc5 Bc5 11.0-0+=) 10.0-0 0-0 11.Na4 (11.Rc1 Nbd7+=) 11...Nbd7 12.Qc2 Nh7 (12...a5!? 13.b5 Bd6+=) 13.Rac1 Rc8 14.Ne5 Ne5 (14...Nhf6 15.Nc6 Bc6 16.Qc6+/–) 15.Be5 Bd6 (15...Qd7 16.d4+/– (16.Bc7 Bd6–/+)) 16.Nc5 Bc5 (16...Rb8!? 17.f4 a5+/–) 17.Qc5+– c6 18.Qa7 (better is 18.d4+–) 18...Qd7? (better is 18...f6 19.Qb7 fe5 20.Rc6 a5 21.Re6 Rf7+–) 19.Ba6 f6 20.Qb7 (20.Bb7?! Rf7 21.Bd6 Qb7+–) 20...Qb7 21.Bb7 fe5 22.Bc8 Rc8 23.Rc5 Nf6 (23...Ra8 24.Ra5 Rc8 25.Rc1+–) 24.Rfc1 1–0. pierred (2695) – kashikoi (2105), net–chess.com, 2008.

4.e3 Nf6 5.f3 (5.Bb5?? Bg2 6.Be2 Bh1–+) 5...a6 6.Ne2 c5 7.Be5 Nc6 8.Bf6 Qf6 (8...gf6?! 9.bc5 Bc5 10.a4=) 9.c3 cb4 10.a4 ba4 11.Ra4 bc3 12.Nbc3 Bd6 13.Ne4 Qe7 14.g3 Ne5 15.Ra3?? (better is 15.N2c3–/+) 15...Ba3 16.N2c3 (16.Nd4 Rc8 17.Nc3 Bb4–+) 16...0-0 (16...f5 17.d4 fe4 18.de5–+) 17.h4 (17.f4 Bb4 18.fe5 Bc3 19.dc3 Be4–+) 17...d5 18.Ng5 h6 19.Nh3 Nf3! 20.Qf3 d4! 21.Ne4 (21.ed4 Qf6 Double attack (21...Bf3 Discovered attack; 21...Qf6 Decoy)) 21...de3 (better is 21...f5 22.Bg2 fe4 23.Qg4 de3 24.Nf4–+) 22.Qe3 f5 23.Bg2 Be4 24.Be4 fe4 25.Nf4 Rab8 26.Ke2 (26.Qe4 Qd6 27.Rh2 Rb5–+) 26...e5 27.Ng6 (27.Ra1 Bb2 28.Ra4 ef4 29.Re4 Qe4 30.Qe4–+) 27...Qf6 (better is 27...Qb4 28.Ne7 Kh7 29.Qc3 Qb5 30.d3–+) 28.Qa3 (28.Nf8 Qf7 29.Ne6–+) 28...Qg6 29.Qb3 Rb3 30.h5 (30.d4 Rb2 31.Kd1 e3 32.de5 Qb1#) 30...Qg3 (30...Qg4 31.Ke1 Rb1#) 31.Re1 (31.Rh3 Qg4 32.Rf3 Qf3 33.Ke1 Rb1#) 31...Rf2 (31...Qf3#) 32.Kd1 Rb1 33.Kc2 Qb3# (33...Qd3#) 0–1. karlsdad – Darkseid, ChessWorld.net, 2012.

4.Nf3 Nf6 5.e3 (--> 1.b4 Nf6 2.Bb2 b5 3.e3 Bb7 4.Nf3 e6 5.a3).

4.bc5+/– Bc5?? 5.Bg7+– Nf6 6.Bh8 Bd4 7.c3 Be5 8.Nf3 Bf4 9.g3 Bh6 10.Qc2 Ke7 11.Bf6 Kf6 12.Qh7 Qf8 13.e4 Bb7 14.e5 Ke7 15.Bg2 Nc6 16.d4 Na5 17.0-0 Nc4 18.a4 ba4 19.Ra4 Bd5 20.Nh4 Bg2 21.Kg2 Nb6 22.Rb4 Nd5 23.Rb7 Bg5 24.Ng6 Kd8 25.Nf8 Kc8 26.Rd7 Ne7 27.Qf7 a5 28.Qe8# 1–0. HMBCHESS2 – windmill, Live Game Caissa's Web, 2005.

4.e4 Nf6 5.e5 Nd5 6.Bb5 cb4 7.Nf3 Nc6 8.0-0 a6 9.Bc4 Bb7 10.Bd5 ed5 11.d4 a5 12.Nbd2 Be7 13.Re1 ba3 14.Ba3 Ba3 15.Ra3 0-0 16.c4 dc4 17.Nc4 Nb4 18.Nd6 Bd5 19.Nd2 Qg5 20.N2e4 Qg6 (better is 20...Be4!? 21.Re4 Qh6+/–) 21.Rg3+– Qe6? (better is 21...Be4 22.Rg6 Bg6+–) 22.Nf6 Kh8 23.Qh5 (better is 23.Rg7 Kg7 24.Qh5+–) 23...h6?? (better is 23...gf6 24.Rh3 Qh3 25.Qh3 Rg8+–) 24.Rg7!! Kg7 25.Nf5 Qf5 26.Qf5 Rh8 27.Re3 Be6 28.Qe4 Rag8 29.d5 Nd5+– 30.Nd5 Kf8 31.Nf6 Rg4 32.Ng4 Rg8 33.Nf6 Rg5 34.Qa8 Ke7 35.Qe8 1–0. rmagas – rogeliovargas (2260), net–chess.com, 2011.

4.Ra4 a5 5.Ra5 Ra5 6.ba5 c6 (6...c5 7.Nh3+=) 7.e3 (7.Bc3 Nf6+=) 7...Qa5 8.Bd3 (8.Nf3 d6+=) 8...Nf6 (8...Ba6 9.Ba6 Na6 10.Nf3=) 9.Bf6 (9.Nf3 d5=) 9...gf6= 10.Nh3 (10.Qf3 Qa1 11.c3 Ba6=) 10...h5 (10...d5 11.Qf3 Nd7 12.0-0=) 11.0-0 (11.Qf3 Be7+=) 11...d5= 12.Nf4 Bd6 (12...h4 13.h3=) 13.Nh5+= White fights for the Initiative 13...Ke7 14.Qg4 Nd7 15.Be2 Ne5 (better 15...Ba6!?+=) 16.Qg7+– Rf8 (16...Ng6!?+–) 17.Nf6 Ba6 (17...Ng6 18.f4 Ba6 19.Ba6 Qa6 20.Nh7+–) 18.Ba6 Qa6 19.Qg5 Ng6 (19...Nd7 20.Nd5 Ke8 21.Qe7 Be7 22.Nc7 Kd8 23.Na6+–) 20.Nh7 Ke8 21.Nf8 Bf8 (21...Nf8 22.Qh5+–) 22.Nc3 Be7 23.Qg3 Qc4 (23...Kd7 24.Rb1 Bd6 25.Qh3+–) 24.Qb8 Bd8 25.Ra1 Ne5 (25...Qg4 26.Qd6 Nh4 27.Qc6 Kf8 28.Qd6 Kg7+–) 26.Ra8 (26.Ra8 Nf3 27.gf3+–) 1–0. DEFFM – GuestNDKJ, freechess.org, 2020.

4.Ra4 d5 5.e3 Bd7 6.b5 Nc6?? (better is 6...c6 7.Nc3 Nf6=) 7.bc6+– Bc6 8.Ra6 Qd7 (8...Ne7+–) 9.Nf3 Bb7 (9...f6 10.Nd4 Rb8 11.Ba3+–) 10.Ne5 Qe7 (10...Qc8 11.Bb5 Ke7 12.Bd7 Ba6 13.Bc8 Bc8 14.Nf7 Kf7 15.Qh5 Ke7 16.Ba3 Kd8 17.Bf8+–) 11.Bb5 (11.Bb5 Kd8 12.Nc6 Bc6 13.Bc6+– (13.Rc6?! Qb4 14.Ba3 Qb5 15.Bf8 Nh6 16.Bg7 Rg8 17.Bf6 Kd7+–)) 1–0. Pommerel,Wim – Bourgoyne, 1985.

4.Ra4 Nf6 5.b5 Bb7 6.Nc3=.

4.Ra4 Nf6 5.b5 Bb7 6.Nf3 a6 7.e3 ab5 (7...Be7 8.Be2=) 8.Ra8 Ba8 9.Bb5 Be4 (9...Bc6 10.Nc3=) 10.Nc3+= c6 (10...Bc6 11.0-0+=) 11.Ne4 Ne4 12.Bd3 (12.Be2 d5+=) 12...Nc5 (12...d5 13.0-0+=) 13.Be2 Ne4 (13...d5 14.0-0+=) 14.0-0 Nf6 15.Qa1 (15.Be5 d6 16.Bd4 d5+/–) 15...Be7 (15...d5 16.Rb1+=) 16.Rb1 d6 (16...0-0 17.Qa4+=) 17.Bc3 0-0 18.Ba5 (18.Rb7 Qe8+/–) 18...Qc8 19.Bc3 (better is 19.Qd4+=) 19...Ne8?? (better is 19...Qd8=) 20.Qa7+– Nc7 21.Rb7 Nb5? (21...Nd5 22.Re7 Ne7 23.Qe7+–) 22.Bb5 cb5 23.Rc7 (23.Re7 Nc6 24.Qb7 Ne7 25.Qe7+–) 23...Qd8+/– 24.g3 (24.Bg7!? Kg7 25.Re7+/–) 24...Bf6+= 25.Bb4 (25.Bf6 Qf6 26.Nd4 e5 27.Nb5 d5+/–) 25...Be7 (25...h6!?=) 26.Nd4 Na6?? (26...Re8 27.Nb5 e5 28.Nd6 Bd6 29.Rf7+–) 27.Nc6 (27.Re7 Nb4 28.Ne6 fe6 29.Rg7 Kh8 30.Rh7 Kg8 31.Qg7) 27...Qc7+= 28.Ne7 Kh8 29.Ng6?? (better is 29.Qa6 Qc2 30.Qd6 Qc1 31.Kg2+/–) 29...hg6 (29...fg6!? 30.Qa6 Qc2 31.Qb5–+) 30.Qa6 Rc8 31.c3 Qc6 32.Qc6 Rc6 33.h4 (33.f4 Ra6–+) 33...Kh7 (33...d5 34.f4–+) 34.d4 (34.d3 Ra6–+) 34...d5 35.f4 (35.Kg2 Kh6–+) 35...Kh6 (35...Rc4 36.g4–+) 36.Kf2 Kh5 37.Kf3 f6 38.Bc5 Ra6 39.Bf8 Ra2 (39...f5 40.Bc5–+) 40.Bc5 (better is 40.Bg7!? f5 41.Bf8–/+) 40...Rc2–+ 41.Bb4 g5 (41...Rc1 42.Ke2–+) 42.hg5 fg5 43.fg5 (43.g4 Kh4–+) 43...Kg5 44.Ba5 (44.Be7 Kg6 45.Bb4 Kf5–+) 44...Rc1 45.Bb4 Rf1 46.Ke2 Rf5 47.e4 (47.Bd6 Kg4 48.Kd2 g5–+) 47...de4 48.Ke3 Rf3 49.Ke4 Rg3 50.d5 (50.Ke5 Re3 51.Kd6–+) 50...Rg4 51.Ke5 ed5 (51...Rb4 52.de6 Rc4 53.e7 Rc3 54.Kd4 Rc4 55.Ke3–+) 52.Kd5 (52.Bd6 Rc4–+) 52...Rf4 (better is 52...Rb4!? 53.cb4 Kf4 54.Kc5–+) 53.Kc6 (53.Kc5 Rf5 54.Kd4 Kg4–+) 53...Rf5 54.Bc5 (54.Kd6 Kf4–+) 54...Kf4 (54...Rc5 55.Kc5 Kf4 56.Kb5–+) 55.Kb5 (55.Bd6 Ke4 56.Bc7–+) 55...g5 56.c4 g4 57.Kb4 Rc5! 58.Kc5 g3 59.Kd6 g2 60.c5 g1Q 61.c6 Qg6 (better is 61...Qd4 62.Kc7–+) 62.Kd7 Qf7 63.Kc8 (63.Kd6 Qf6 64.Kc7 Ke5–+) 63...Ke5 64.c7 Kd6 (64...Kd6 65.Kb7 Qb3 66.Ka6 Kc7 67.Ka5 Kc6 68.Ka6 Qb6) 0–1. Engles,Michael – Krmpotic,Roman, IECC, 2002.

4.Ra4 Nf6 5.b5 d6 6.e3 Bd7 7.Nf3 c6 8.c4 (8.Bf6 Qf6 9.b6 a5=) 8...cb5 9.cb5 a6 (9...Be7 10.Be2=) 10.Nc3 Be7 11.Be2 0-0 12.0-0 Qb6 13.Ra2 (13.Qa1 d5+=) 13...Rc8 14.d4 d5 15.Ne5 Qd6 (15...Bb4!? 16.Qa1 a5+=) 16.Ba3 Qb6? (better is 16...Qa3!? 17.Ra3 Ba3+/–) 17.Be7 (better is 17.Na4!? Qa5 18.Be7 Bb5 19.Bb5 ab5+–) 17...Rc3 18.Qa1 a5?? (18...Rc8 19.ba6 Qc7+–) 19.Qc3 1–0. DEFFM – goscha, freechess.org, 2018.

4.Ra4 Nf6 5.Nf3 Bb7 6.Nc3 Be7+=.

4.b5 Nf6 5.c4 c6 6.Qa4 cb5 7.cb5 Be7 (7...Bb7 8.Nc3=) 8.e3 0-0 9.Nf3 a6 10.Qc2 (10.Nc3 Bb7=) 10...Bb7 11.Nc3 ab5 12.Ra8 Ba8 13.Bb5 Nc6 14.0-0 Nb4 15.Qa4 Nbd5 (15...Qc7 16.Nd4=) 16.Ne2 h6 17.Ne5 Nb6 18.Qd4 The pressure on d7 grows 18...d5 (18...d6 19.Nc6 Bc6 20.Bc6=) 19.Rc1 (better 19.Ra1+–) 19...Nc8? (better 19...Qb8+=) 20.Nd7+– Nd6 21.Nf8 Nb5 (21...Bf8 22.Ba6 Qb8 23.Ng3+–) 22.Qa4 Nd6 23.Bf6 Bf6 24.Nd7 Be7 25.Nd4 Nc4?! (25...Bb7+–) 26.d3 Ne5 1–0. onur604 (2320) – Howdo (2105), lichess.org, 2020.

4.c4 Bb4?? 5.Bg7 Bb7 6.Bh8+–.

4.c4 Nf6 5.b5 (5.Qa4 Nc6 6.b5 Nb4=) 5...c6 (5...a6 6.Ra4 Bb7 7.Nc3=+) 6.e3 Be7 7.Nf3 0-0 8.Be2 d5 9.0-0 Bb7 10.cd5 ed5 (10...Nd5 11.Qa4 cb5 12.Qb5=) 11.Qa4 cb5 12.Qb5 Qb6 13.Nc3 Nbd7 14.Rfb1 Bc6 15.Qd3 Qc7 16.Nd4 Ne5 (16...Nc5 17.Qf5+=) 17.Qf5 Bd7 (17...Nc4 18.Nc6 Qc6 19.Nd5 Nd5 20.Rc1+–) 18.Qf4 Bd6?? (better 18...Rfe8+–) 19.Ndb5 Nc4 (19...Qc6 20.Nd6 Qd6 21.Nb5 Bb5 22.Be5 (22.Bb5?! Nc4 23.Qd6 Nd6+–) 22...Qe5 23.Qe5 (23.Bb5 Qf4 24.ef4 Rfb8=+) 23...Be2 24.Rb7+–) 20.Nc7 Bf4 21.Na8 Nb2 22.ef4 Ra8 (22...d4 23.Nd1 (worse 23.Rb2 dc3 24.dc3 Ra8+–; worse 23.Ra7 dc3 24.dc3 Na4+–) 23...d3 24.Bf1+–) 23.Rb2 1–0. onur604 (2320) – owl77 (1995), lichess.org, 2020.

4.e3 Bb4?? 5.Bg7 Nf6 6.Bh8+–.

4.e3 Bb7 5.b5 (5.Ra4 Nf6=) 5...c6 (5...a6!? 6.Ra4 ab5 7.Ra8 Ba8–/+) 6.Nf3 Qb6 7.c4 (7.Nc3 cb5 8.Bb5 Na6+=) 7...cb5 (7...a6 8.bc6 Nc6 9.Nc3=) 8.cb5 a6 9.Bd4 Bc5?? (better is 9...Qd6+=) 10.Bg7+– ab5 11.Bh8 f6 (11...Ne7 12.Nc3+–) 12.Nd4! Bd4 13.Qh5 Kf8 (13...Kd8 14.ed4 Qd4+–) 14.Qh7 (better is 14.ed4 Qd4 15.Nc3+–) 14...Ba1+= 15.Qg7 Ke8 16.Qg8 Ke7 17.Nc3 b4?? (better is 17...Bc3 18.Qg7 Kd6 19.dc3 a3 20.Qf8 Kc7 21.Bf6 a2 22.Bd8 Kc6 23.Bb6 a1Q 24.Ke2 Qb2 25.Kf3 Kb6 26.Kg3 Qc3 27.Qd8 Ka7–+) 18.Qh7 (better is 18.Bf6!? Kd6 19.Qg3 Kc6 20.Bb5 Qb5 21.Nb5 Kb5 22.Ba1 a3+–) 18...Kd6 (18...Kd8 19.Bf6 Kc7+–) 19.Ne4 (better is 19.Nb5 Qb5 20.Bb5 Bg2 21.Rg1+–) 19...Kc7 (19...Be4 20.Qe4 Nc6 21.Qd3 Kc7 22.Qb1–/+) 20.Be2 (20.Nf6 Qc5 21.Qb1 Bf6 22.Bf6 Qf5+=) 20...b3 (20...Qc6 21.f3 Qc1 22.Bd1 Be4 23.Qe4 Nc6–+) 21.0-0 (worse is 21.Bf6 Be4 22.Qe4 Bf6 23.Qa8 b2–/+) 21...b2 (21...Qc6 22.f3 Qc2 23.Ra1 b2+=) 22.Nf6+– b1Q?? (better is 22...Ba6 23.Ne8 Kc8 24.Ba6 Qa6+–) 23.Rb1 (23.Qb1?! Qb1 24.Rb1 Bf6 25.Bf6 a3+–) 23...Bb2 (23...Qb1 24.Qb1 Bf6 25.Bf6+–) 24.Qc2 (24.Rb2 Qc6 25.Ne8 Kc8+–) 24...Bc6 (24...Qc6 25.Rb2 Qc2 26.Rc2 Nc6+–) 25.Rb2 Qa5 26.Ne8 Kd8 (26...Kc8 27.Rb5 Qa7 28.Nd6 Kc7 29.Be5+–) 27.Nd6 (better is 27.Bf6 Kc8 28.Nd6 Kc7+–) 27...Ke7 28.Ne4 (28.Rb5 Qb5 29.Nb5 Kd8 30.Qc5 Kc8 31.Nd6 Kd8 32.Qb6 Ke7 33.Nc8 Kf7 34.Qd8 Kg6 35.Qf6 Kh7 36.Qg7) 28...a3 29.Bf6 (29.Bf6 Kf8 30.Rb5+–) 1–0. GuestFYYM – GuestHRPF, freechess.org, 2018.

4.e3 Nf6 5.b5 (5.Ra4 Bb7=) 5...c5 (5...a6 6.Ra4 Bb7 7.Nf3=) 6.c4 (6.Ra4 d5=) 6...Bb7 7.Nf3 Qb6 (7...a6 8.Ra4 ab5 9.Ra8 Ba8 10.cb5=) 8.Be2 (8.Nc3 a6=) 8...d5 (8...a6 9.Qa4 Be7 10.Nc3=) 9.0-0 (9.Bf6 gf6 10.cd5 Bd5+=) 9...dc4 (9...a6 10.Bf6 gf6 11.ba6 Qa6 12.cd5+=) 10.Bc4 (10.Bf6 gf6 11.Na3 Nd7+=) 10...Nbd7 (10...a6 11.Nc3=) 11.Nc3 (11.d3 a6 12.ba6 Ba6 13.Ra4 Qb2 14.Ba6 Be7+=) 11...Rd8 (11...Bd6 12.d3=) 12.Na4 (12.d3 Bd6+=) 12...Qc7 13.Nc3 (13.d3 Bd6 14.e4 0-0+=) 13...Nb6 (13...Bd6 14.g3=) 14.Be2+= Bd6 15.Ra7 Qb8 16.Qa1 Bf3 (better is 16...Rd7!? 17.Ra5 c4+=) 17.Bf3+– Bh2 18.Kh1 Be5? (18...Nbd7 19.g3 Bg3 20.Ra8+–) 19.Bc6?? (19.Rb7 Qc8 20.Rb6 Rd2+–) 19...Nfd7?? (19...Nbd7!?+–) 20.f4 (20.Rb7 Qc8 21.Ne4 0-0 22.Be5 Ne5 23.Qe5 Nc4+–) 20...Bf6? (20...Bc7 21.Ne4 0-0 22.Bg7 Rfe8+–) 21.Qa3 (better is 21.Rb7 Qd6 22.Ne4+–) 21...0-0+/– 22.Ne4 Attacks the isolani on c5 (22.d3!?+/–) 22...Bb2= 23.Qb2?? (better is 23.Qa2 Nf6 24.Rb7=) 23...Qa7–+ 24.Ra1 Qc7 25.Qb3 (25.Qa2 Rc8–+) 25...Nb8 (better is 25...e5 26.f5–+) 26.Ng5 (26.Qa3 Nc6 27.Qc5 f5–+) 26...Nc6 (better is 26...h6 27.Nf3 Nc6 28.bc6–+) 27.Ne6 (27.Qc2 f5 28.Qc5 Rd6–+) 27...fe6 28.Qe6 Kh8 (28...Rf7 29.Qc6 Qc6 30.bc6–+) 29.bc6 (29.Qc6 Qc6 30.bc6 Rd2–+) 29...Rf6 (29...Rf6 30.Qe4 Qc6 31.Qc6 Rc6–+) 0–1. GuestYPXH – GuestNFSF, freechess.org, 2018.

4.a3 Bb7 5.f4 (5.Nf3 Nf6=) 5...Nf6 6.Nf3 c5 7.c3 (7.bc5 Bc5 8.c4 bc4 9.Bc4 d5=) 7...c4 8.Be2 Bd6 (8...Be7 9.d3=) 9.0-0 (9.d3 cd3 10.Bd3 Nd5=) 9...Qb6 10.Nd4 0-0 11.d3 cd3 12.Bd3 Be4 13.Be4 Ne4 14.Qh5 (14.Qd3 f5=) 14...Nf6 (14...Be7!?+=) 15.Qf3= Nc6 16.Nd2 (16.c4 bc4 17.Nc6 Qc6 18.Qc6 dc6 19.Bf6 gf6+=) 16...Be7 (16...a5 17.Qg3=) 17.c4 bc4 (17...d5 18.Rac1 Rac8 19.cd5 Nd5 20.Ne4+=) 18.Nc4+= Qd8 (18...Nd4!? 19.Bd4 Qd8+=) 19.Nc6+/– dc6 20.Qc6 Qd5 21.Qd5 Nd5 (21...ed5 22.Nb6 Rab8 23.Bd4+/–) 22.Rac1 (22.e4 Nf6 23.Bf6 Bf6+–) 22...Nf6 23.Ne5 Rac8 (23...Rfc8 24.Nc6 Kf8 25.Rfe1+/–) 24.Nc6 Bd8 25.Rfd1 Nd5 26.Kf2 Bf6?? (26...Ne7 27.Rd8 Rc6 28.Rc6 Rd8 29.Ra6 f6+–) 27.Bf6 Nf6 (27...gf6 28.e4 Nb6 29.Ne7 Kg7 30.Nc8 Rc8 31.Rc8 Nc8+–) 28.Ne7 (28.Ne7 Kh8 29.Rc8 Rc8 30.Nc8+–) 1–0. Wall,Bill – Captive, internet, 2005.

4.c4 Bb7 5.Nf3=.

4.c4 c6 5.Nf3 Nf6 (5...Bb4 6.Bg7 Bd2 7.Nbd2+–) 6.a3 d6 7.Nc3 Be7 8.Qc2 (8.a4 bc4 9.Bc4 d5+=) 8...h6 (8...0-0 9.a4=) 9.Nd4 (9.a4 ba4 10.Ra4 c5+=) 9...Bb7 (9...e5 10.Nf5 Bf5 11.Qf5=) 10.cb5 (10.a4 c5 11.bc5 dc5 12.Ne6 fe6 13.Qg6 Kf8 14.cb5 Nbd7+=) 10...cb5 (10...ab5 11.a4=) 11.Bd3 (11.a4 e5 12.Nf5 0-0+=) 11...Nbd7 (11...e5 12.Nf5 0-0 13.Ne7 Qe7 14.0-0=) 12.f4 (12.0-0 e5 13.Nf5 0-0=) 12...Rc8 13.0-0 White prepares the advance f5 13...0-0 (13...e5 14.Nf5 e4 15.Be2+=) 14.Qb3 (14.a4 ba4 15.Qa4 Nb6+=) 14...Nb6 15.f5 (15.e4!?=) 15...e5–/+ Black is in command 16.Nde2 Qd7 17.Ng3 Nc4 18.Rf2 (18.Bc4 Rc4 19.d3 Qc6+=) 18...d5 19.Bc4 dc4 20.Qc2 Qc6 (20...Qd3 21.Qd3 cd3 22.e4–/+) 21.h3 (21.e4 Qb6 22.Rc1 Ng4–+) 21...Bd6 22.Nce2 (22.e4 Qb6–/+) 22...Qc7 (22...Rfd8 23.Nc3–/+) 23.e4 Qc6 24.Nc3 Bb8 (24...Qb6 25.Rc1–/+) 25.Kh2 Rcd8 26.Raf1 (26.a4 Bd6 27.ab5 ab5–/+) 26...Rd3 27.Rf3 Rfd8 28.R1f2 (28.Rd3 Rd3 29.Rc1 Qd6–/+) 28...Ba7–+ 29.Re2 Qb6 (29...Qd6 30.Nf1–+) 30.Qd1 (30.Rf1 Qd6–+) 30...Qd6 31.Nd5 (31.Rd3 Qd3 32.Qb1 Qd6–/+) 31...Nd5 32.ed5 Rd5 33.Ne4 Qb6 (33...Qd7 34.f6–+) 34.Nc5 Bb8 35.Ne4 (35.Rfe3 Re8–+) 35...f6 (35...Rd3 36.Rd3 Rd3 37.Nc5 e4 38.Kh1–+) 36.Rg3 Rd3 (36...Ba7 37.Nc5–+) 37.Bc3 (37.Rd3 Rd3 (worse is 37...cd3 38.Re3–+) 38.Nc5 Rd5–/+) 37...Rg3–+ 38.Kg3 Rd3 39.Kh2 Be4 (39...Bd6 40.Qc2–+) 40.Re4 Qd8 (40...Ba7 41.Qe1–+) 41.Qg1 (41.Qg4 Ba7–+) 41...Qd5 42.Rg4? (better is 42.Qe1–+) 42...e4 43.Kh1 e3! 44.de3?? A deflection (44.Qe3 Re3) 44...Rc3–+ 45.Rd4 Qe5 (45...Qe5 46.Rd7 Kh7–+) 0–1. Dillimann,Hans_Peter – Kienle,Paul, Afro op Germany, 1994.

4.Be2 Bb4?? 5.Bg7 Bb7 6.Bh8+–.

4.Be2 Bb7 5.Nf3 Bb4 6.Bg7 Bf3 7.gf3 Qg5 8.Bh8 Qg2+–.

4.Be2 Bb7 5.Nf3 Bb4 6.Bg7 Bf3 7.Bf3+–.

4.Be2 Bb7 5.Nf3 Bb4 6.Bg7 Bf3 7.Bh8?! Be2 8.Qe2 Nf6+–.

4.Be2 Bb7 5.Nf3 Nf6=.

4.Nf3 Bb4?? 5.Bg7+– Nc6 6.Bh8 f6 (6...Bb7 7.a4 ba4 8.c3+–) 7.Nh4 (7.a4 ba4 8.c3 Bc5+–) 7...Qe7 8.Qh5 Kd8 9.Bd3 (9.a4 ba4 10.c3 Bc5+–) 9...f5 10.Nc3 (10.c3 Bc5+–) 10...d5 (10...Nf6 11.Qh6 Ng4 12.Nf5 ef5 13.Qh5+–) 11.f4 (11.a4 ba4 12.Ra4 Nf6 13.Bf6 Qf6+–) 11...Bd7 (11...Nf6 12.Bf6 Qf6 13.Qh7+–) 12.Qg5 (12.a4!? Be8 13.Qg5 Qg5 14.fg5 ba4+–) 12...Qg5 13.fg5 Kc8 (13...Nce7 14.g4 c5 15.gf5 ef5 16.Rf1+–) 14.0-0 Kb7 (14...Nge7 15.Rab1+–) 15.Nf3 (15.Rab1 Nge7 16.Bf6 Bc3 17.Bc3 Rg8+–) 15...Nge7 16.Ne5 (16.Bf6 Bc3 17.Bc3 Rg8+–) 16...Be8 (16...Rh8 17.Nd7 Rd8 18.Nf6+–) 17.Bf6 (17.Nf3 Bd7 18.Bf6 Bc3 19.Bc3 Rg8+–) 17...Bd6 (17...Bc3 18.dc3 Ne5 19.Be5+–) 18.Nc6 (18.Nf3 Nb4+–) 18...Bc6 19.Be7 (19.Be2 Rg8+–) 19...Be7 20.h4 Rg8 (20...b4 21.Rab1+–) 21.Ne2 (21.g4 b4 22.Ne2 fg4+–) 21...h6 (21...Bb4 22.c3 Bd6 23.g4+–) 22.Nf4 (22.gh6 Rh8+–) 22...hg5 (22...e5 23.Ne6 hg5 24.hg5+– (24.Rf5 gh4 25.Re5 Bf6+/–)) 23.hg5 (23.Ne6 gh4 24.Bf5 Bd6+–) 23...Bd7 24.g6 c6 (24...Bd6 25.a4+–) 25.Rf3 (25.a4 Bd6+–) 25...e5 (25...Bd6 26.Rh3+–) 26.Bf5 (26.Nh3 e4 27.Be4 de4+/–) 26...Bf5 27.Nd5! cd5 28.Rf5 Rg6 29.Rf7 Re6 30.Raf1 Kb6 31.R1f5 d4 (31...b4 32.g4+–) 32.e4 Kc5 33.g4 Kc4 34.Rf3 (34.g5 Bb4 35.d3 Kc3+–) 34...b4 (34...Bg5 35.c3 Rc6+–) 35.g5?? (better is 35.Kf2+–) 35...Bg5+/– 36.Rc7 Kb5 37.d3 (37.Rf2 Rg6 38.Rb7 Kc6=) 37...Bf4 (37...Be3 38.Kf1+/–) 38.Kf1 (38.Rf7 Rh6+/–) 38...Rh6 39.Rf4?? (better is 39.Rb7 Kc5 40.Rg7+/–) 39...ef4–/+ 40.Rf7 Rh2 (40...Rh1 41.Kg2 Rh4 42.Kf3=) 41.e5 (better is 41.Rf4!? Rc2 42.Rf2 Rc1 43.Ke2+=) 41...Rc2–/+ 42.e6 (42.Rf4 Kc5 43.Rf2 Rf2 44.Kf2–+) 42...Rc1?? (42...Ra2 43.Rf4 Kc5 44.e7 Ra1 45.Ke2 Ra2 46.Kf3+–) 43.Ke2–/+ Rc6?? (43...Ra1 44.Kf3 Kc6= (44...Ra2 45.e7 Rf2 46.Kf2+–)) 44.e7+= Re6 45.Kf3 Kc5 46.Kf4 Kd6 47.Kf5 Re5 48.Kf4 Re6 (48...Re3 49.a3+=) 49.Kf3 (49.Kf5 Re7 50.Rf6 Kc5 51.Ra6 Re3–+) 49...a5 (49...Re3 50.Kf4–/+) 50.Kf4? (better is 50.Rf4!?+=) 50...a4–/+ 51.e8Q Re8 52.Ra7 a3 53.Rb7 Kc5 (53...Re3 54.Rb4 Rd3 55.Ke4 Re3 56.Kd4–+) 54.Rc7–/+ Kd5 (better is 54...Kb5!?–/+) 55.Rc4? (better is 55.Rd7 Ke6 56.Rd4+=) 55...Rb8 (55...Rb8 56.Kf5 b3–+) 0–1. Dopper,Johan – van Dalsen,Jan, 1994.

4.Nf3 c6 5.c4 bc4 6.Bc4 d5 7.Bb3 a5 (7...Bb4?? 8.Bg7 Nf6 9.Bh8+–) 8.ba5 Qa5 9.0-0 Bd7 (9...Nf6 10.Qc2=) 10.Bc3 Qd8 11.Qe2 (11.Ne5 Nf6+=) 11...Nf6= 12.d3 Be7 13.Nbd2 Na6 14.Kh1 Nc5 15.Qd1 (better 15.Bc2!?+=) 15…Nd3–/+ (15...Nd3 16.a3 c5–/+ (worse 16...Ra3 17.Bf6 gf6 18.Ra3 Ba3 19.Nb1+=)) 0–1. aravind555 (1675) – lfs000 (1655), lichess.org, 2020.

4.Nf3 Nf6 5.a3 c5 6.bc5 Bc5 7.d4 Bb6 8.Bd3 Bb7 9.0-0 Qc7 10.Nbd2 d5 11.c3 Nc6 12.e4 (12.a4 Na7+=) 12...de4= 13.Ne4 Nd5 14.Qd2 (14.a4!?+=) 14...Na5 15.Qg5 f6 16.Qh5 g6 17.Qh4 0-0-0 (better is 17...0-0=) 18.Nfd2?? (better is 18.Nf6 Nb3 19.Rae1 Nc3 20.d5 Bd5 21.Nd5 Rd5 22.Qf6+–) 18...Nf4 19.Qg3 f5 (19...Nd3?! 20.Qd3 f5 21.Ng3=) 20.Ng5 h6 (better is 20...Qc6 21.Rae1 Bc7–+) 21.Nh3+= Ng2 22.c4?? (better is 22.a4 Nc4 23.Qc7 Kc7 24.Bc4 bc4 25.Nc4+=) 22...Bd4–+ (22...bc4 23.Nc4 Nc4 24.Bc4 Qg3 A) 25.fg3? e5–+ (25...Bd4?! 26.Bd4 Rd4 27.Be6 Kb8 28.Bf7–/+); B) 25.hg3=; 22...Nc4 23.Nc4 bc4 24.Bc4 Qg3 A) 25.fg3? e5–+ (25...Bd4?! 26.Bd4 Rd4 27.Be6 Kb8 28.Bf7–/+); B) 25.hg3 Bd4 26.Bd4 Rd4 27.Be6 Kb8 28.Rfb1=) 23.Bd4 Rd4 24.f4 Rhd8 (worse is 24...bc4 25.Be4 Rd2 26.Bb7 Qb7 27.Rf2 Rf2 28.Nf2–+; 24...Nc4?! 25.Bc4 Rd2 26.Be6 Kb8 27.Bb3–+) 25.Nf2 (25.Nf3 Rd3 26.Kg2 Nc4 27.Qg6–+) 25...Nf4 26.cb5 (26.Qe3 bc4 27.Nc4 Nc4 28.Bc4 Rc4 29.Rfe1–+) 26...Rd3 27.Nd3 Ne2 (27...Qb6 28.Rf2 Ne2 29.Kf1 Ng3 30.hg3 Qb5 31.Rc1 Kb8 32.Kg1 Rd3 33.Nf1–+) 28.Kf2 Qg3 (better is 28...Ng3 29.Rac1 Nf1 30.Rc7 Kc7 31.Nf1 Rd3–+) 29.hg3 Rd3 30.Ke2 Rg3 31.Rac1 Kd7 32.Rfd1 Ke7 33.Kf2 (better is 33.a4 Rg2 34.Ke1–+) 33...Rg2 (33...Ra3 34.Ra1 Ra1 35.Ra1 ab5 36.Ra5+=) 34.Kf1 Rg4 (better is 34...ab5 35.Rc7 Kf6 36.Rb7 Rd2 (36...Nb7?! 37.Kg2 Nd6 38.Nb1=) 37.Rd2 Nb7–+) 35.Rc7 Kf6 36.b6 Ra4 (36...Rg3 37.a4 Rg4 38.Ra1–+) 37.Nb1 h5 38.Rdd7 Bc6 39.Rd6 Rc4 (39...Bd5 40.Rd8–+) 40.Kf2 (40.Nd2!? Rf4 41.Kg1–+) 40...h4 41.Nd2 Rc3?? (41...Rc2 42.b7 Rb2–+ (42...Nb7?! 43.Rcc6 Nd6 44.Rc2=)) 42.b7+= Nb7 43.Rdc6 Rc6 44.Rc6 a5 45.Rb6 (45.Nc4 g5=) 45...Nc5= 46.Rb5 Nd3 47.Ke3 Ne5 48.Ra5 g5 49.Kf2 g4 50.Rb5 Nd3 51.Ke3 Ne5 52.a4 g3 (52...h3 53.Kf2 Nd3 54.Kg3=) 53.a5 (53.Rb1 Kg5+=) 53...h3+/– 54.Re5?? (54.Rb1 h2 55.Nf3 Nc4 56.Kf4+–) 54...Ke5 (better is 54...h2 55.Ne4 Ke5 56.Ng3 f4 57.Kf2 fg3 58.Kg2 Kd5–+) 55.a6 (55.Kf3 h2 56.Kg2 Kd5–+) 55...h2 56.a7 h1Q (better is 56...g2 57.Nf3 Kd6–+) 57.Nf3–/+ Kd6 58.a8Q Qc1 59.Ke2? (better is 59.Kd3!? Qb1 60.Kc3–/+) 59...Qc4–+ 60.Kd1? (60.Ke1 Qe4 61.Qe4 fe4 62.Ng1+=) 60...Qd5 61.Qd5 Kd5 (61...ed5 62.Ke2 Ke6 63.Ke3–/+) 62.Ke2 (62.Ng5 f4 63.Ke2 Ke5–+) 62...e5 (62...f4 63.Ng5–+) 63.Nh4 (63.Ng5 Kd4–+) 63...Ke4 64.Ng2 f4 65.Ne1 (65.Nh4 Kd5 66.Kf3 Kd4–+) 65...Kf5 66.Nf3 e4 67.Nd2 (67.Ne1–+) 67...e3 (67...g2 68.Ne4 Ke4 69.Kf2 f3 70.Kg3 g1Q 71.Kh3 Kf4 72.Kh4 Qg4) 68.Nf3 Ke4?? (68...g2 69.Nh4 Ke4–+) 69.Ng5–/+ Kd4 (69...Ke5 70.Nh3 Kf5=) 70.Nf3?? (70.Kf3 Ke5=) 70...Kc3 (70...Kd5 71.Kd3 g2–+) 71.Ne1= Kd4 72.Nf3 Kc4 (72...Kd5 73.Kd3 g2 74.Ke2–+) 73.Ne5?? (better is 73.Ne1!?=) 73...Kd5?? (73...Kc3 74.Nf3 g2–/+) 74.Nf3 g2 75.Ke1? (75.Ng1 Ke4 76.Nf3 g1N 77.Ng1 Kd4=) 75...Ke4 (better is 75...Kc4 76.Kd1 Kc3–+) 76.Ke2= Kd5 77.Ke1 Ke6 (77...Kc4 78.Ke2 Kc3 79.Ng1+=) 78.Ke2 Kf6?? (78...Kd6 79.Ng1 Ke5+=) 79.Ng1= Kf5 80.Kf3 Ke5 81.Kg2 Ke4 82.Ne2 (82.Nh3 f3 83.Kg3 e2 84.Ng5 Ke3 85.Nf3 Kd3=) 82...f3 83.Kf1 Kd3 84.Ng1 Ke4 85.Nh3 (85.Ne2 f2=) 85...e2 (better is 85...Kf5!?–/+) 86.Ke1 Ke3 87.Nf2 Kf4 88.Nd3 Kg3 89.Nf2 Kg2 90.Nd3 Kg3 91.Nf2 Kf4 92.Nd3 Ke4 93.Nf2 Ke3 94.Ng4 ½–½. Franco Rincon,D (1670) – Enfedaque Jimenez,JC, Championship de Madrid Individual Absol, 2013.

4.Nf3 Nf6 5.a4 Bb4=.

(--> 1.b4 b5 2.Bb2 Bb7 3.e3 e6).

4.Nf3 a6 (--> 1.b4 b5 2.Bb2 Bb7 3.e3 a6 4.Nf3 e6).

4.Nf3 Nf6 (--> 1.b4 b5 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6).

4.a4 a5 5.ab5+/– cb5 6.Bb5 (6.Qf3 Nc6+/–) 6...Bb7+= 7.Nf3 ab4 8.Ra8 Ba8 9.c3 (9.0-0 Qb6 10.c4 bc3 11.Nc3 Nf6+=) 9...bc3 (9...Qf6 10.Be2+=) 10.Nc3 Bc6 11.Be2 (11.0-0 Nf6+=) 11...Nf6 12.0-0 Be7 13.d4 (13.Qc2 0-0+=) 13...0-0 (13...Bf3 14.Bf3 d5 15.Qa4 Nbd7 16.Rb1=) 14.Qc2 (14.Ne5 d5+=) 14...g6 (14...Qc7 15.Rc1=) 15.Ne5+= Bd5 (15...d6 16.Nc6 Nc6 17.Rb1+=) 16.e4 (better is 16.Rc1+/–) 16...Be4? (better is 16...Bb7+=) 17.Ne4+– Ne4 (17...d6 18.Nf6 Bf6 19.Ng4+–) 18.Qe4 d5 (18...d6 19.Ng4+–) 19.Qc2 (19.Qe3 Bd6+–) 19...Bd6 20.Rc1 Be5 (20...Qh4 21.Ra1+–) 21.de5 Qb6 (21...Qg5 22.Qc7 Qd2 23.Ba3 Qe2 24.Bf8 Kf8 25.Qb8 Kg7 26.h4+–) 22.Ba3 Re8 23.Bd6 (23.Qa4 Rd8 24.Be7 Nd7+–) 23...Qd8 (23...Nd7+–) 24.Qc7 Qc7 (24...Kg7 25.Qb7 Qg5 26.Rb1+– (26.Bb8 Qc1 27.Bf1 d4–/+)) 25.Rc7 Rd8 (25...Kg7 26.Bb5 Rg8 27.Kf1+–) 26.g3 Nd7 (26...f5 27.Kf1 d4 28.Bc4+–) 27.Be7 Ne5 (27...Ra8 28.Rd7 Rb8 29.f4+–) 28.Bd8 Kg7 1–0. GuestKCMN – GuestTFPY, freechess.org, 2016.

4.a4 Bb7!?+=.

4.Nf3 Bb4?? 5.Bg7+– Qa5 6.Bh8 Bd2 (6...Be7+–) 7.Nbd2 f6 (7...d6 8.Ng5 h6 9.Nge4+–) 8.Nd4 Ba6 (8...b4 9.Bd3 h6+–) 9.Qh5 Kd8 10.Qh7 Ne7 11.Bf6 Kc7 12.Qe7 Bc8 13.Ne6 Kb6 (13...Kb7 14.Nc5 Kb6 15.Qd8 Kc5 16.Be7 Kd5 17.Qg8 Ke5 18.f4 Kf5 19.g4) 14.Qd8 Ka6 (14...Kb7 15.Nc5) 15.Nc5 1–0. GuestNQCZ – GuestCNTD, freechess.org, 2017.

4.Nf3 Bb4?? 5.Bg7 Nf6 6.Bh8+–.

4.Nf3 Nf6 5.a3 Bd6 6.c4 0-0 7.cb5 cb5 8.Bb5 Qb6 9.Be2 Ba6 10.Nc3 Rc8 11.b5 Bb7 12.0-0 a6 13.Rb1 a5 14.Na4 Qd8 15.Rc1 Ne4 16.Rc8 Qc8? (better is 16...Bc8 17.d3 Nf6+–) 17.Nb6 Qd8 18.Na8 Ba8 19.Qc2 Qc7 (19...Nc5+–) 20.Qc7 Bc7 21.Rc1 f6 (21...Nc6+–) 22.Rc7 Nd6 23.a4 Ne4 24.Rc8 Kf7 25.Rb8 Bd5 26.d4 g5 27.h3 h5 28.b6 g4 29.hg4 hg4 30.Ne1 Bc6 31.Ba3 Nc3 32.Bg4 f5 33.Bf3 Ba4 34.b7 Bc6 35.Rf8 Kg6 (35...Kg7 36.b8Q Nd5 37.Qg3 Kh7 38.Rf7 Kh6 39.Qg7) 36.b8Q a4 (36...Nd5 37.Qg3 Kh7 38.Rf7 Kh6 39.Qg7) 37.Qe8 (37.Qg3 Kh7 38.Rf7 Kh6 39.Qg7) 37...Kg5 (37...Kh6 38.Qh5 Kg7 39.Rf7 Kg8 40.Qh7) 38.Qh5 1–0. Van Esbroeck,Dirk – Puri,Chaand, SN–2010-0-00292, 2010.

4.Nf3 Nf6 5.a4 Bb4 6.ab5 0-0=.

4.Bb5 c6 5.Bd3 a6 (5...Nf6 6.a3+/–) 6.Nf3+/– Qb6 (6...Nf6 7.a3+/–) 7.a3 Nd7 8.Bd4 (8.Nc3 c5+/–) 8...Qc7 9.Bb2 (9.e4 e5 10.Bb2 Ngf6+/–) 9...e5 (better is 9...Qb6!?=) 10.e4+/– d4 (10...Ngf6 11.Qe2 Bd6 12.c4 dc4 13.Bc4+/–) 11.0-0 (11.c3 c5 12.Qc2 dc3 13.dc3 Be7+/–) 11...Ngf6 (11...c5 12.c3 c4 13.Bc2=) 12.c3+/– c5 13.cd4 cd4 14.Nh4 (14.Qe2 Qb7+/–) 14...Nb6 (14...a5 15.b5+=) 15.Nf5 (15.f4 Bd6+/–) 15...Bf5 16.ef5 Be7 (16...Bd6 17.Qf3+=) 17.Qe2+/– 0-0 18.Rc1 (18.f4 Na4 19.Rc1 Qb6 20.fe5 Nb2 21.ef6 Bf6=) 18...Qd6 19.Re1 (worse is 19.Ba6 Na4 20.Bd4 ed4–/+) 19...Na4 20.Ra2 (better is 20.Bc1+=) 20...Nd5? (better is 20...Rfe8!?+=) 21.Qe5+– Qe5 (21...Nb2 22.Rb2 Nf4 23.Qd6 Bd6 24.Bc4+–) 22.Re5 Rfd8 (22...Nb2 23.Rb2 Nf4 24.Ba6+/–) 23.Be4 (23.Bd4 Bf6 24.Re4 Rac8+–) 23...Bf6 (23...Rac8 24.g3 (24.Bd5?! Nb2 25.g3 Bf6 26.Rb2 Be5=) 24...Nf6 25.Bd3+–) 24.Rd5 (24.Bd5?! Rac8 25.Re1 Rd5+=) 24...Rd5 25.Bd5 Rd8 (25...Rc8 26.f4 Rc2+–) 26.Bb7 (26.Bc4 Rc8 27.d3 h6+–) 26...Rd6 27.f4 (27.Be4 Rd8+–) 27...Rb6 28.Be4 a5 29.Ba1 ab4 30.Rc2 h6 (30...Kf8 31.Rc4 Ra6 32.Rb4+–) 31.Rc4 Nb2 (31...b3 32.Ra4 b2 33.Bb2 Rb2 34.Ra8 Kh7+–) 32.Bb2 ba3 33.Rc8 Kh7 34.Ba3 Rb3 35.Bc5 d3 (35...h5 36.Na3 Rb2 37.Nc4+–) 36.Na3 Rb2 (36...Bd4 37.Bd4 h5 38.Bd5 Ra3 39.Bf7+–) 37.Bd5 Rd2 38.Bf7 Rd1 39.Kf2 Rd2 (39...Bh4 40.g3 Rd2 41.Kf3 Rf2 42.Bf2 g6 43.fg6 Kg7 44.Bd4 Bf6 45.Rg8) 40.Kf3 h5 (40...Rg2 41.Kg2 h5 42.Bg6 Kh6 43.Rh8) 41.Bg6 Kh6 42.Rh8 1–0. DEFFM – griffel, freechess.org, 2018.

4.Bb5 Bd7 5.Bd7 Nd7 6.Ne2 (better 6.Nf3+=) 6...Bb4?? (better 6...Rb8+=) 7.Bg7+– f6 (7...Ngf6 8.Bh8 Bd6 9.Nbc3+–) 8.Bh8 Qe7 9.Nd4 0-0-0 (9...Ne5 10.Qe2+–) 10.Nc6 Qc5 (10...Qf8 11.Qe2 Nb8 12.Nd8 Kd8 13.Qg4+–) 11.Nd8 Kd8 12.0-0 (better 12.c3 Ba5+–) 12...d4 (12...Qf8 13.c3 Bd6 14.Qc2+–) 13.ed4 (better 13.a3 Ba5 14.Qg4 Qf8 15.ed4 Ne7+–) 13...Qd4 (13...Qf8 14.Qg4+–) 14.c3 f5 1–0. aravind555 (1610) – gernase1, lichess.org, 2019.

4.Nf3 Bb4?? 5.Bg7+– (5.Bb5?! Kf8+/–) 5...Nc6 (5...Ne7 6.Bh8 Ng6 7.Bg7+– (worse is 7.Bb5 c6+–)) 6.Bb5 Bd7 7.Bh8 Na5 (7...Nf6 8.c3 Be7 9.Bf6 Bf6 10.Qc2+–) 8.Bd7 Qd7 (8...Kd7 9.Ne5 Kc8 10.Nf7+–) 9.Be5 (better is 9.Ne5 Qa4 10.Qh5 0-0-0 11.Qf7 Qc2 12.Qe6 Kb7+–) 9...Nc4 10.0-0 f6 11.Bb2! Nb2 12.Qe2 Qc6 (12...Rb8+–) 13.Nd4 Qd6 (13...Qd7 14.Ne6! Qe6 15.Qb5 Kd8 16.Qb4+–) 14.c3 Ba3 (14...c5 15.Nb5 Qd7 16.cb4+–) 15.Na3 Qa3 16.Ne6 Rc8 17.Qb5 (better is 17.Qh5 Ke7 18.Nd4 Kf8+–) 17...c6 18.Qb7 Ne7 19.Qb4 Qb4 20.cb4 Nd3 21.a3 Kf7 22.Nd4 h5 23.Ne2 (23.Rfb1 Rg8+–) 23...a6 24.Nc1 Ne5 25.Nb3 Nc4 26.d3 Ne5 27.d4 Nc4 28.Nc5 Nd2 29.Rfd1 Nb3 (29...Nc4+–) 30.Nb3 Rg8 31.Nc5 Ra8 32.Nd3 h4 33.h3 Nf5 34.Rac1 a5 35.Rc6 ab4 36.ab4 Ra3 37.Nf4 Ne7 38.Rc5 Rb3 39.Nd5 Nd5 40.Rd5 Rb4 41.Rh5 1–0. Valpa – Ronan48, playchess.de, 2005.

4.Nf3 Nf6=.

4.a3 a6 5.c4 bc4 6.Bc4 Bb7 7.Nf3 (--> 1.b4 b5 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

4.a3 a6 5.Nf3 c5 6.bc5 Bc5 7.Be2 d5 8.0-0 Qc7 9.d3 Bd6 10.Nbd2 Ng4 11.h3 Nh2 12.Nh2 Bh2 13.Kh1 0-0 14.Nf3 Bd6 15.Rc1 e5 16.c4 e4 17.Nd4 dc4 18.de4 Be6 19.Bf3 Nd7 20.Ne6 fe6 21.e5 Ne5 22.Ba8 Nd3 23.Qc2 Nc1 24.Qc1 Ra8 25.Rd1 Rf8 26.Qc3 e5 27.f4 ef4 28.Rd6 fe3 29.Rd1 e2 30.Re1 Rf1 0–1. Phomopsis (1655) – LeraBe (1630), lichess.org, 2020.

4.Bb5 Bb4 5.Nf3 Ba6 6.Ba6 Na6 7.0-0 Be7 8.c4 0-0 9.d3 Rb8 10.Ba3 c5 11.Nc3 (11.Qa4 Rb6=) 11...Nb4 (11...Qa5 12.Nb5=) 12.Nb5 (12.Bb4 cb4 13.Nb5 Qa5=) 12...a6 13.Nc3 d5 14.cd5 ed5 15.Bb4 Rb4 16.a3 Rb8 17.Rb1 (17.Qa4 Qb6=) 17...Qd6 (17...Qa5 18.Rb3=+) 18.Rb8 Rb8 19.d4 (19.Qc2 c4 20.dc4 Rc8=) 19...h6 (19...c4 20.Nb1–/+) 20.dc5=+ Qc5 21.Ne2 (21.Nb1 Bd6=+) 21...Qa3–/+ 22.Ned4 Qc5 (22...Rb2 23.Nf5 Bc5 24.N3d4–/+) 23.Qa4=+ a5 24.Ne5 Rb4 (24...Ra8 25.Nec6=+) 25.Qa1= a4?? (25...Rb7=) 26.Ndc6?? (better 26.Nd3 Qc7 27.Nb4 Bb4 28.Rc1+–) 26...Rb6 (26...Re4 27.Rc1 Qa3 28.Ne7 Qe7 29.Nc6=+) 27.Ne7 (27.Qa4!? Bd6 28.Qa7=+) 27...Qe7–/+ 28.Nf3 a3 29.Rc1 Kh7 30.Rc3 (30.Qd4 Rb2 31.Rf1 Kg8–/+) 30...Ra6 (better 30...Ne4!? 31.Rc1 Qb4–+) 31.h3 (31.Nd4 Ne4 32.Rc2 Qb4–/+) 31...a2 (31...Qb4 32.Rc2–/+) 32.Rc2 Qa3 33.Nd4 Ne4 34.f3?? (34.Kh1!?–/+) 34...Nc5 (better 34...Qe3 35.Kh2 Ng5–+) 35.Ne2?? (35.Kf2–+) 35...Nb3 (35...Qe3 36.Kh1 Nb3 37.Qa2 Ra2 38.Ra2 d4 39.Nd4 Qe1 40.Kh2 Nd4–+) 36.Qc3 (36.Ra2 Qa2 37.Qd1–+) 36...a1Q 37.Kh2 Qc3 38.Rc3 Qb4 (38...Qb4 39.Rd3 Qc4–+; 38...Qb2 39.Rb3 Qb3 40.e4 de4 41.fe4 Qb8 42.Kg1 Qb1 43.Kh2 Qe4 44.Nc1 Qf4 45.Kg1 Ra1 46.g4 Qd2 47.g5 Rc1) 0–1. Markzela (1715) – yasareker (1975), lichess.org, 2020.

4.Bb5 Bb4 5.Nf3 Bd6 6.Na3 c5 (6...Bb7 7.Rb1+=) 7.Nc4 (7.Rb1 0-0+=) 7...Be7 (7...Bc7 8.0-0=) 8.0-0 (8.Bf6 gf6 9.Rb1 Rg8+=) 8...a6 (8...0-0 9.Rb1=) 9.Ba4+= Bb7 (9...0-0 10.Rb1+=) 10.Rb1 (10.Rb1 Bd5 11.Nb6 Qb6 12.Bf6=). GuestGRDT – GuestTKJK, freechess.org, 2020.

4.Bb5 Bb7 5.a3?? (5.Nf3 Bb4 6.a3 Be7=) 5...a6 (better 5...Bg2 6.Be2 Bh1–+) 6.Bf1+= d5 7.Nf3 c5 8.bc5 Bc5 9.c4 Nc6 (9...dc4 10.Bc4 Nbd7 11.d4+=) 10.cd5+– ed5 11.Nc3 0-0 12.Rb1 Qd6 (better 12...Bd6!?+–) 13.Na4+– Ba7?? (better 13...Rab8 14.Nc5 Qc5 15.Bf6 gf6+–) 14.Bf6 Rab8 (14...Qf6 15.Rb7 Qd6 16.Qc2+– (16.Ba6?! Na5+–)) 15.Bc3 (better 15.Bh4!? Qa3 16.Bg3 d4+–) 15...Qa3 16.Ne5 (better 16.d4+–) 16...Rfe8 (16...d4 17.ed4 Qe7+–) 17.Nd7 (17.Rb7 Rb7 18.Nc6 Qd6 19.Na7 d4+–) 17...d4 18.Nb8 dc3 19.Nc6 (19.Na6?! cd2 20.Qd2 Qa4+–; 19.Ba6?! cd2 20.Qd2 Rb8 21.Rb7 Qa4+–) 19...cd2 20.Qd2 Bc6 21.Nc3 Qe7 22.Ne2 (22.Ba6 Bg2 23.Rg1 Ba8+–) 22...Rd8 23.Qb4 (23.Qa5 Qd7+–) 23...Bc5 Threatening mate: Bxb4 24.Qb2 (better 24.Qc3 Ba4 25.Nc1 Rd1 26.Ke2 Qd8+–) 24...a5 (24...Be4 25.Nf4 Ba3+–) 25.Nf4?? (better 25.Nc3 Bb4 26.Bc4+–) 25...Bb4–/+ 26.Ke2 Rd2?? (26...Rd2 27.Qd2 Bd2 28.Rb8 Be8+–; 26...Qe4 27.f3 Qb1 28.Qb1 Rd2 29.Ke1 Rb2 30.Kd1 Rb1 31.Kc2 Re1–+) 0–1. aravind555 – Bassnectar (1610), lichess.org, 2019.

4.a3 Bb7 5.f3 Bd6?? 6.Bg7+– Qh4 7.Ke2 Be4 8.Bh8 Nh6 9.fe4 Qe4+/– 10.Kf2 Ng4 11.Qg4 Qg4 12.Nf3 e5 13.Be5?? Be5–/+ 14.Ne5? Qd4–+ 15.Kf3 Qa1 16.Nc3 Nc6 17.Nc6 dc6 18.g3?? Qa3 19.Bd3 Qb4 20.Re1 Kf8 0–1. bunnyrabbitz – alignment, ChessWorld.net, 2011.

4.d4 Bb4=+ 5.Nc3 Bb7–/+ 6.e5 d6 7.ed6 Qd6 8.a3 Bc3 9.Bc3 Nc6 10.Nf3 Nf6–/+ 11.Bd3 0-0 12.d5? ed5 13.Ng5 h6 14.Nf3 Rfe8 15.Be2 Ne4 16.Bb2 Qg6 17.0-0 Rad8 18.a4 b4 19.c4?? dc4 20.Qe1 c3 21.Bc1 Bc8 22.Nh4 Qf6 23.Bf3 c2 24.Be3 b3 25.Bd1 Qa1 (25...Qa1 26.Bc2 Qe1 (26...bc2?! 27.Qa1 Nb4 28.a5–+) 27.Re1 bc2–+) 0–1. West Islander – glo1, ChessWorld.net, 2009.

4.f4 Bb7–/+ 5.Bd3 Nf6 6.Qe2 Bb4 7.Nf3 Bc5 8.e5 Nd5 9.g3 Nc6 10.Be4 f5 11.ef6 Nf6 12.d4 Nd4–+ 13.Bd4 Bd4 14.Bb7 Ba1 15.Ba8 Qa8 16.0-0 Qd5 17.c3 Qc5 18.Kg2 Bc3 19.Rc1 b4 20.Qa6 Nd5?? 21.Qa8 Kf7? 22.Qh8?? Ne3= 23.Kg1 Nd1 24.Kh1 Qd5 25.Kg2 Ne3 26.Kf2 Nf5?? 27.Ng5 Ke7 28.Nc3 bc3 29.Nf3?? Qa2–+ 30.Kg1 Qb2 31.Re1 c2 32.g4? c1Q 33.Rc1 Qc1 (33...Qc1 34.Kf2 Qe3 35.Kg2 Qe2 36.Kg1 Qf3 37.gf5 Qg4 38.Kh1 Qf4 39.Qg7 Kd6–+) 0–1. baovn21 – guiovanni, kurnik, 2011.

4.a3 c6 5.e3=.

4.a3 d5 5.e3 a6 6.Be2 Nbd7 7.0-0 c5 8.bc5 Bc5 9.d3 0-0 10.Nbd2 Bb7 11.c4 bc4 12.dc4 dc4 13.Bc4 Nb6 14.Be2 Qe7 15.Rb1 Rfd8 16.Bd4 Bf3 17.Bf3 Rab8 18.Bc5 Qc5 19.Qc1 Qc1 20.Rfc1 g6 21.Nb3 Nbd5 22.Nc5 a5 23.Nb7+/– Rdc8 24.Rc8 Rc8 25.Na5 Nc3 26.Rb4 Nfd5 27.Rc4 Rb8 28.h4 Rb1 29.Kh2 Ra1 30.e4+– Ra3 31.ed5 ed5 32.Rc5 d4 33.Nc6 d3 34.Ne5 Nb1 35.Rd5 d2 36.Nc4 Ra2 37.Be4 d1Q 38.Rd1 Nc3 39.Rd2 Ra4 40.Rd8 Kg7 41.Bd3 f5 42.Rd7 Kh6 43.g4 fg4 44.Ne5 Ra1 45.Ng4 Kh5 46.Kh3 Rh1 47.Nh2 Kh6 48.Bc2 Ne2 49.Kg2 Rc1 50.f4 Rc2 51.Ng4 Kh5 52.Nf6 (52.Nf6 Kh4 53.Rh7#) 1–0. Schalkwijk,Peter – Sarihan,Sefa, ZL–2006–0-00015, 2006.

4.a3 g6 5.e3 (5.e4 a6 6.c4+/–) 5...Rg8 (5...c6 6.Ne5 Bg7 7.Qf3+=) 6.Nc3 (better is 6.Bb5!? Bb7 7.0-0+–) 6...a6+= 7.Bd3 (7.Be2 Bb7+=) 7...Bg7 8.0-0 (8.Be2 Bb7+=) 8...d5 (8...Bb7 9.Be2+=) 9.Rb1 (9.Be2 Qe7+=) 9...Nbd7 10.e4 de4 (10...Bb7 11.Qe2+=) 11.Ne4 (11.Be4 Ne4 12.Ne4 Bb2 13.Rb2 Bb7+=) 11...Ne4 (11...Bb7 12.Qe2+=) 12.Be4+/– Rb8 13.Bg7 Rg7 14.Ng5?? (better is 14.d4+/–) 14...Qg5–+ 15.Bc6 (15.Re1 Kf8–+) 15...Kd8 (15...Rb6 16.Qf3–+) 16.Re1 Bb7 17.Bd7?? (17.Bb7 Rb7 18.Qf3 Qd5–+) 17...Kd7 (17...Qg2) 18.d4 (18.f3–+) 18...Qg2 0–1. Nautiluschess – Odranoel, ICS blitz, 2001.

4.e4 Ne4 5.Bb5 Bb4 6.Bg7 Rg8 7.Bb2 Rg2 8.Rf1 c5 9.c3 Ba5 10.d3 Nd6 11.Ba4 Qb6 12.Bb3 Bb7 13.Nbd2 Nc6 14.Qe2 Ba6 15.0-0-0 0-0-0 16.c4 Rgg8 17.Ne4 Ne4 18.Qe4 Nb4 19.Qa8 Kc7 20.Qe4 Rb8 21.Qf4 Kc8 22.Qf7 Rd8 23.Bf6 Na2 24.Ba2 Qb4 25.Rd2 Qa3 26.Rb2 Qd3 27.Rb8 1–0. mania_mania (1850) – inderos_39 (1860), lichess.org, 2020.

3.a3 a5 4.e3 ab4 5.ab4 Ra1 6.Ba1 Bb4?? (better is 6...Nf6 7.b5 d5=) 7.Bg7+– f6 (7...Ba6 8.Ne2+–) 8.Bh8 Qe7 9.Qg4 Qf7 (9...Kf8 10.Nf3+–) 10.Bf6 (better is 10.Qb4 Nc6 11.Qc3 Qg6+–) 10...Bd2 11.Nd2 Nf6 12.Qc4 Ba6 (12...Nc6+–) 13.Qc7 Bf1 14.Qb8 Ke7 15.Kf1 Ng4 (15...Qg6 16.c4 Qc2 17.Ke1+–) 16.Ngf3 e5 (16...Qg6 17.c4+–) 17.Qb6 e4 18.Qb4 d6 19.Qe4 (19.Qe4 Ne5 20.Ne5 de5 21.Qe5 Qe6 22.Qe6 Ke6 23.c4+–) 1–0. PepRally – grigoropoulo3, Live Game Caissa's Web, 2004. (=1.a3 b6 2.b4 e6 3.Bb2)

3.a3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6).

3.b5 Bb4?? 4.Bg7+– Qg5 5.Bh8 Qb5 6.e3 Qg5 7.Nf3 Qh5 8.g4! Qh6 (8...Qg4 9.Rg1 Decoy) 9.h4 Bb7 10.g5 Qh5 11.Be2 Qg4 12.Rg1 Qf5 13.Nd4 (13.Ne5 Nc6 14.Bd3 Qh3+–) 13...Qh3 14.Be5 Bc5 (14...Bd6 15.Bf1 Qh4 16.Bd6 cd6 17.Nb5+–) 15.Bg4 Qh4 16.Nf3 Bf3 17.Qf3 Nc6 18.Bf4 Nf6 19.gf6 0-0-0 (19...Qf6 20.Bc7 Qg7 21.Rg2+–) 20.Bg3 Qg5 21.Nc3 Ba3 (21...Bb4 22.Ne4 Qa5 23.c3+–) 22.Rb1 a6 23.Bh5 Qc5 24.Qf4 Nb4 25.Kf1 (25.Bf7 Rf8 26.Qe4 Qc6 27.Qh7 Nc2 28.Ke2 Bd6+–) 25...Kb8 26.Rb3 Nc2 (26...d6 27.Ra3 Nd5 28.Qa4 Nc3 29.Qa6 Qb5 30.Qb5 Nb5 31.Rb3+–) 27.Bd1 Bc1 28.Nb1 d6 29.Qa4 Na3 30.Na3 Ba3 31.Bf3 Qc1 32.Ke2 b5 33.Rb5! Ka7 (33...ab5 34.Qa8 Mate attack) 34.Rb7 (34.Rb7 Ka8 35.Qa6) 1–0. Taulien,Hans_Juergen (2350) – Kueppers,Michael (1995), remoteschach.de, 2002.

3.b5 c6 4.a4 a6 5.c4 (5.Nf3 d5=) 5...d6 6.e3 ab5 (6...Nf6 7.Nf3=) 7.ab5 Ra1 8.Ba1 cb5 9.cb5 Bd7 10.Nf3 Be7?? (10...Nf6 11.Bf6 Qf6 12.d4=) 11.Be2?? (better 11.Bg7 Bf6 12.Bh8 Bh8 13.d4+–) 11...Nf6= 12.0-0 0-0 13.d4 Qe8 Exerts pressure on the isolated pawn 14.Nbd2 (better 14.Qd3+=) 14...Bb5–/+ 15.Bb5 Qb5 16.Qc2 Qc6 17.Qb3 Qd7 (17...Nbd7!?–/+) 18.Qb6=+ Nc6 19.Rc1 Rc8 20.Bb2 Bd8 21.Qb5 Na7 22.Qd7 Nd7 23.Rc8 Nc8 24.Kf1 Ncb6 25.Ke2 (25.Ke2 d5 26.Ba3=). BeepBeepImAJeep (2575) – german11, lichess.org, 2016.

3.b5 f5 4.e3 Nf6 5.c4 Be7 6.a4 (6.Nf3 a6=) 6...0-0 (6...Bb7 7.Nf3=) 7.Nf3 d6 8.Be2 Bb7 9.Nc3 e5 10.d4 Nbd7 (10...e4 11.Ng5 Bc8 12.0-0+=) 11.Ng5+= Qe8 12.Ne6 Rf7? (better 12...Qg6!? 13.Nf8 Qg2+=) 13.Nc7+– Qc8 (13...Qd8 14.Na8 Bg2 15.Rg1 Ba8 16.a5+–) 14.Na8 Qa8 (14...Bg2 15.Nb6 Nb6 16.Rg1+–) 15.d5 f4 (15...Nc5 16.a5 ba5 17.Ra5+–) 16.e4 (16.ef4!? ef4 17.a5 ba5 18.Ra5 Bd8+–) 16...Nc5 17.f3 (17.Bf3 a5+–) 17...g5 (17...Qd8 18.0-0+–) 18.Ba3 (18.0-0 Bc8+–) 18...Kh8 (18...Qc8 19.0-0+–) 19.Bc5 bc5 20.a5 a6 (20...Bc8 21.0-0+–) 21.ba6 Qa6 22.Nb5 Bc8 23.h3 (23.0-0 Bd8+–) 23...Nh5 (23...Bd8 24.Qd2+–) 24.Qb3 (24.0-0 Ng3 25.Re1 Bd8+–) 24...Ng3 25.Rg1 (25.Rh2 Bd8+–) 25...Bd7 (better 25...Bd8+–) 26.Nc7 Qc8 27.Nb5 (better 27.a6 Qc7 28.a7+–) 27...Qf8?? (27...Qa6 28.Kf2 g4 29.hg4 Bh4+–) 28.a6+– Qh6 (28...Bb5 29.cb5 Ne2 30.Ke2 Bf6+–) 29.a7 Qh4 (29...Rf8 30.a8Q Ra8 31.Ra8 Bf8 32.Nc3+–) 30.Kd2 (better 30.a8Q Kg7 31.Kd1 Ne2 32.Ke2 Qg3+–) 30...Ne2 31.Ke2 Rf8 32.a8Q Ra8 33.Ra8 Kg7 34.Ra7 g4 35.Rd7 gf3 36.gf3 Kh6 37.Qd1 (37.Nd6 Qf6 38.Qb7 Qg5 39.Re7 Qg6 40.Rg6 Kg6 41.Rh7 Kf6 42.Qg7) 37...Qh3 38.Re7 Qh2 39.Kd3 Qf2 (39...Qh3 40.Rh1 Kg6 41.Rh3 Kf6 42.Re6 Kg7 43.Qg1 Kf8 44.Nd6 h5 45.Re8) 40.Qe1 Qb2 (40...Qf3 41.Kc2 Qg3 42.Rg3 fg3 43.Qg3 Kh5 44.Rh7) 41.Qh4 1–0. BeepBeepImAJeep (2615) – wildtal (1930), lichess.org, 2015.

3.c3 Bb7 4.e3 g6 5.Nf3 Bg7 6.d4 Ne7 7.Bd3 0-0 8.Nbd2 h5 9.0-0 c6 10.a3 d5 11.Qc2 a5 12.Rfe1 Nd7 13.e4 ab4 14.ab4 Ra1 15.Ra1 de4 16.Ne4 Nd5 17.Ned2 Re8 18.Re1 Qc7 19.Ra1 Bf8?? (19...Qd8 20.Nc4 Qc7 21.Ra7+=) 20.Nb3 (better is 20.Bg6!? Nf4 21.Be4+–) 20...Be7 21.Nbd2 Bd8 (21...Bf8!?=) 22.Be4 Qd6 23.Bd5 (23.Nc4!? Qc7 24.Nfe5 Ne5 25.Ne5+/–) 23...cd5 24.Re1 Bc7 25.Ra1 Qh2?? (better is 25...Ra8=) 26.Nh2+– Bh2 27.Kh2 Nf6 28.Kg1 Ng4 (28...Rc8 29.Qd3 Rc7 30.Ra7+–) 29.Kf1 (29.Qa4!? Nf6+–) 29...b5 30.Kg1 f5 (30...Bc6 31.Nf3+–) 31.Nf3 (better is 31.Ra7 Bc6 32.Rc7+–) 31...f4 (31...Re7 32.Ra7 Kf7 33.Qe2+–) 32.Re1 (better is 32.Qg6 Kf8 33.Qh5 Re7+–) 32...g5 33.Ne5 (better is 33.Qg6 Kf8 34.Ng5 Nh6 35.Nh7 Ke7 36.Qe6 Kd8 37.Qd6 Kc8 38.Re8) 33...Nf6 34.Nf3 (34.Qg6 Kf8 35.Qf7) 34...g4?? (34...Ng4 35.Qg6 Kf8 36.Ng5 Re7 37.Re6 Bc6 38.Qf5 Ke8 39.Qf7 Kd8 40.Qe7 Kc8 41.Rc6 Kb8 42.Qc7 Ka8 43.Ra6) 35.Ne5 (35.Qg6 Kh8 36.Re5 Re7 37.Qf6 Kg8 38.Rg5 Kh7 39.Qe7 Kh6 40.Qg7) 35...h4 Black prepares the advance g3 36.Bc1 (36.Qg6 Kf8 37.Qf7) 36...g3 37.fg3 (37.Qg6 Kf8 38.Qf7) 37...fg3 38.Nf3 (38.Qg6 Kf8 39.Qf7) 38...Ng4 (38...Ne4+–) 39.Be3 (39.Qg6 Kh8 40.Qe8 Kg7 41.Re6 h3 42.Re7 Kf6 43.Qf7) 39...e5 40.Qd2 (40.Qg6 Kf8 41.Qg4 h3 42.Qf5 Ke7 43.Bg5 Kd6 44.de5 Kc7 45.Qf7 Kb8 46.Qe8 Bc8 47.Bf4 h2 48.Kh1 Kc7 49.e6 Kb6 50.Qd8 Ka7 51.Qc7 Ka6 52.Ra1) 40...ed4 (40...e4 41.Nh4 Ra8 42.Qe2+–) 41.Bd4 Re1 42.Qe1 Nh6 43.Be5 (43.Qe8 Kh7 44.Ng5) 43...Nf5+– 44.Bd4 h3?? (44...Nh6 45.Qe8 Kh7 46.Ng5) 45.gh3 (45.Qe6 Kf8 46.Ng5 h2 47.Kh1 Nd4 48.Qf7) 45...Nd4 46.Nd4 Kh7 47.Qg3 (47.Qg3 Bc8 48.Qc7 Kg6 49.Qc8 Kf7 50.Qe6 Kf8 51.Nf5 d4 52.Qf6 Ke8 53.Qe7; 47.Qe7 Kg6 48.Qe6 Kh7 49.Nf5 Kh8 50.Qe5 Kh7 51.Qg7) 1–0. Fournier,Frederic – pascale, Active Blind, 2008.

3.c3 Nf6 4.d4 Be7 5.Nd2 0-0 6.Ngf3 a5 7.b5 c6 8.c4 d5 9.e3 dc4 10.Bc4 cb5 11.Bb5 Ba6 12.a4 Qd5 13.Qe2 Nbd7?? 14.0-0 Bb5= 15.ab5 Ne4 16.Rfd1 Ndf6 17.Ne4 Ne4 18.Ne5 Rac8 19.Nc6 Bf6 20.Ba3 Rfe8 21.Rac1 h6 22.f3 Ng5 23.h4 Nh7= 24.Rc2 Bh4 25.Rdc1 Qd7 26.Ne5 Rc2=+ 27.Rc2 Qd5 28.Qc4 Qc4 29.Rc4 Bf6 30.Rc6 1–0. ashllley – bobnyc, caissa.com, 2006.

3.c4 a6 A) 4.Nf3 A1) 4...Bb7 5.b5 (5.a3 Nf6 6.Nc3 Nc6 7.d4 Ne7 8.e3 Nf5 9.Bd3) 5...ab5 6.cb5 Nf6 7.e3 d5 8.Be2 c5 9.Nc3; A2) 4...Nc6 5.b5 (5.a3 Nf6 6.Nc3 Bd6 7.e3 Bb7 8.Bd3 0-0 9.0-0) 5...Nce7 6.Nc3 Nf6 7.e3 ab5 8.Nb5 Bb7 9.Bd3; A3) 4...Nf6 5.a3 (5.b5 Bb7 6.Nc3 Bd6 7.e3 0-0 8.Bd3 ab5 9.cb5) 5...Nc6 6.Nc3 Bd6 7.e3 0-0 8.Bd3 Qe7 9.0-0; B) 4.Nc3 B1) 4...Nc6 5.a3 (5.b5 ab5 6.cb5 Ne5 7.Nf3 Nc4 8.Bc1 Nf6 9.e4) 5...Bb7 6.e3 Nf6 7.Nf3 Bd6 8.Bd3 h6 9.0-0; B2) 4...Nf6 5.b5 (5.a3 Bb7 6.Nf3 Bd6 7.e3 Nc6 8.Bd3 0-0 9.0-0) 5...Bb4 6.Nf3 ab5 7.cb5 0-0 8.g3 d5 9.Bg2; B3) 4...Bb4 5.Nf3 (5.e3 Nc6 6.a3 Be7 7.Nf3 f5 8.d4 Nf6 9.d5) 5...Nf6 6.e3 Nc6 7.Bd3 0-0 8.Qb3 Bb7 9.0-0; C) 4.b5 C1) 4...Bb7 5.Nc3 (5.Nf3 Nf6 6.Nc3 ab5 7.cb5 d5 8.e3 c5 9.bc6) 5...Nf6 6.Nf3 ab5 7.cb5 c5 8.g3 d5 9.Bg2; C2) 4...Nf6 5.Nc3 (5.Nf3 ab5 6.cb5 d5 7.g3 Bd6 8.Nc3 c5 9.Bg2) 5...ab5 6.cb5 d5 7.Nf3 Bd6 8.g3 c5 9.Bg2; C3) 4...ab5 5.cb5 Nf6 6.Nf3 d5 7.g3 c5 8.Bg2 Nbd7 9.Nc3; D) 4.a3 D1) 4...Nc6 5.Nf3 (5.e3 f5 6.Nf3 Bb7 7.Nc3 Nf6 8.d4 Bd6 9.Bd3) 5...Nf6 6.Nc3 Bd6 7.e3 0-0 8.Bd3 Bb7 9.0-0; D2) 4...Bb7 5.Nc3 (5.Nf3 Nf6 6.Nc3 Nc6 7.e3 Bd6 8.Bd3 Qe7 9.0-0) 5...Nf6 6.Nf3 Bd6 7.e3 Nc6 8.Bd3 Qe7 9.0-0; D3) 4...Nf6 5.Nc3 (5.Nf3 Nc6 6.Nc3 Bd6 7.e3 0-0 8.Bd3 Bb7 9.0-0) 5...Nc6 6.Nf3 Bd6 7.e3 0-0 8.Bd3 Bb7 9.0-0.

3.c4 Na6 A) 4.b5 Nc5 5.Nf3 (5.Nc3 Bb7 6.Nf3 Nf6 7.g3 g5 8.h3 Bg7 9.Bg2) 5...Bb7 6.Nc3 Nf6 7.g3 a6 8.Bg2 ab5 9.cb5; B) 4.e3 B1) 4...Nf6 5.a3 (5.b5 Nc5 6.Nc3 Bb7 7.Nf3 a6 8.ba6 Ra6 9.Be2) 5...c5 6.b5 Nc7 7.Nc3 d5 8.Nf3 Bd6 9.Bd3; B2) 4...Bb7 5.a3 (5.b5 Nc5 6.Nf3 a6 7.Nc3 Nf6 8.ba6 Ra6 9.Be2) 5...c5 6.b5 Nc7 7.Nc3 Nf6 8.Nf3 Bd6 9.Bd3; B3) 4...Nb4 5.a3 (5.Nc3 Nf6 6.a3 Na6 7.d4 Bb7 8.Nf3 Bd6 9.Bd3) 5...Nc6 6.Nf3 f5 7.Nc3 Nf6 8.Be2 Be7 9.0-0; C) 4.Nf3 C1) 4...Nf6 5.a3 (5.b5 Nc5 6.Nc3 Bb7 7.g3 g5 8.h3 h5 9.Bg2) 5...Bb7 6.Nc3 Bd6 7.e3 0-0 8.Bd3 c5 9.b5; C2) 4...Bb7 5.a3 (5.b5 Nc5 6.Nc3 Nf6 7.g3 g5 8.h3 h5 9.Bg2) 5...Nf6 6.Nc3 Bd6 7.e3 0-0 8.Bd3 c5 9.b5; C3) 4...Nb4 5.a3 (5.Nc3 Nf6 6.a3 Nc6 7.e3 Bb7 8.Bd3 Ng4 9.Qc2) 5...Nc6 6.e3 Nf6 7.Nc3 Bb7 8.Bd3 Ng4 9.Qc2; D) 4.a3 D1) 4...Bb7 5.Nf3 (5.Nc3 Nf6 6.Nf3 Bd6 7.e3 0-0 8.Bd3 c5 9.b5) 5...Nf6 6.Nc3 Bd6 7.e3 0-0 8.Bd3 c5 9.b5; D2) 4...Nh6 5.Nc3 (5.Nf3 Bb7 6.Nc3 Bd6 7.Nb5 0-0 8.Nd6 cd6 9.e3) 5...Bb7 6.Nf3 Bd6 7.Nb5 0-0 8.Nd6 cd6 9.e3; D3) 4...Nf6 5.Nc3 (5.Nf3 Bb7 6.Nc3 Bd6 7.e3 0-0 8.Bd3 c5 9.b5) 5...Bd6 6.Nf3 Bb7 7.e3 0-0 8.Bd3 c5 9.b5.

3.c4 Nc6 A) 4.a3 A1) 4...Bb7 5.Nf3 (5.Nc3 a5 6.b5 Ne5 7.e4 Nf6 8.d4 Ng6 9.e5) 5...Nf6 6.Nc3 Bd6 7.Nb5 Be7 8.e3 a6 9.Nc3; A2) 4...a6 5.Nf3 (5.Nc3 Nf6 6.Nf3 Bb7 7.e3 Bd6 8.Bd3 0-0 9.0-0) 5...Nf6 6.Nc3 Bd6 7.e3 Bb7 8.Bd3 0-0 9.0-0; A3) 4...Nf6 5.Nf3 (5.e3 Bb7 6.Nf3 Bd6 7.Nc3 a5 8.Nb5 ab4 9.Nd6) 5...Bb7 6.Nc3 Bd6 7.Nb5 Be7 8.e3 a6 9.Nc3; B) 4.Nf3 B1) 4...a6 5.b5 (5.a3 Nf6 6.Nc3 Bd6 7.e3 0-0 8.Bd3 Bb7 9.0-0) 5...Na5 6.e3 ab5 7.cb5 Nf6 8.Nc3 Bb7 9.Bd3; B2) 4...Nb4 5.Nc3 (5.e3 Nf6 6.a3 Na6 7.d4 Bb7 8.Nc3 Bd6 9.Bd3) 5...Nf6 6.a3 Na6 7.g3 Bb7 8.Bg2 Bd6 9.0-0; C) 4.e3 C1) 4...Bb7 5.b5 (5.Nf3 Nb4 6.a3 Nc6 7.Nc3 Nf6 8.Bd3 Ng4 9.Qc2) 5...Na5 6.Nf3 Nf6 7.Nc3 Qe7 8.Na4 a6 9.Be5; C2) 4...a6 5.a3 (5.Nf3 Nb4 6.Nc3 Nf6 7.a3 Nc6 8.Bd3 Bb7 9.0-0) 5...f5 6.Nc3 Nf6 7.d4 Bd6 8.Nf3 0-0 9.Bd3; C3) 4...Nb4 5.Nf3 (5.a3 Nc6 6.Nf3 Bb7 7.Nc3 Nf6 8.Bd3 Ng4 9.Qc2) 5...Nf6 6.a3 Nc6 7.Nc3 Bb7 8.Bd3 Ng4 9.Qc2; D) 4.b5 D1) 4...Nce7 5.Nf3 (5.Nc3 Nf6 6.Nf3 Bb7 7.e3 a6 8.Bd3 ab5 9.Nb5) 5...Nf6 6.Nc3 Bb7 7.e3 a6 8.Bd3 ab5 9.Nb5; D2) 4...Na5 5.e3 (5.Qa4 Nf6 6.Nf3 Bb7 7.Nc3 a6 8.e3 ab5 9.cb5) 5...Nf6 6.Nf3 Bb7 7.Nc3 Bd6 8.Bd3 0-0 9.0-0.

3.c4 f5 4.Nf3 (4.Qa4 A) 4...a6 5.Nc3 (5.Nf3 Bb7 6.Nc3 Nc6 7.a3 Nf6 8.d4 Bd6 9.c5) 5...Bb7 6.Nf3 Nc6 7.a3 Nf6 8.d4 Bd6 9.c5; B) 4...Na6 5.a3 (5.Bc3 Nf6 6.d3 Bb7 7.Nf3 Bd6 8.Na3 c6 9.Rb1) 5...Nf6 6.Nc3 Bb7 7.Nf3 Be7 8.e3 0-0 9.Bd3; C) 4...Bb7 5.Nc3 (5.Nf3 a6 6.d4 Nc6 7.a3 Nf6 8.Nc3 Bd6 9.c5) 5...a6 6.Nf3 Nc6 7.e4 fe4 8.Ne4 Nf6 9.Nf6; 4.b5 A) 4...Nf6 5.Nf3 (5.Nc3 a6 6.Nf3 Bb7 7.e3 ab5 8.cb5 Bd6 9.Bc4) 5...Bb7 6.Nc3 a6 7.e3 ab5 8.cb5 Bd6 9.Bc4; B) 4...Bb7 5.Nf3 (5.Nc3 Nf6 6.Nf3 a6 7.e3 ab5 8.cb5 Bd6 9.Bc4) 5...Nf6 6.Nc3 a6 7.e3 ab5 8.cb5 Bd6 9.Bc4; C) 4...a6 5.Nc3 (5.Nf3 Nf6 6.Nc3 Bb7 7.e3 ab5 8.cb5 Bd6 9.Bc4) 5...Nf6 6.Nf3 Bb7 7.e3 ab5 8.cb5 Bd6 9.Bc4; 4.a3 A) 4...Nf6 5.Nf3 (5.Nc3 Bb7 6.Nf3 Nc6 7.e3 Bd6 8.Nb5 Be7 9.Bd3) 5...Bb7 6.Nc3 Nc6 7.e3 Bd6 8.Nb5 Be7 9.Bd3; B) 4...Nc6 5.Nf3 (5.Nc3 Nf6 6.Nf3 Bb7 7.e3 Bd6 8.Nb5 Be7 9.Bd3) 5...Nf6 6.Nc3 Bb7 7.e3 Bd6 8.Nb5 Be7 9.Bd3; C) 4...Bb7 5.Nf3 (5.Nc3 Nc6 6.Nf3 Nf6 7.e3 Bd6 8.Nb5 Be7 9.Bd3) 5...Nf6 6.Nc3 a5 7.b5 Bd6 8.g3 g5 9.Rg1) 4...Nf6 (4...Bb4?? 5.Bg7 Nf6 6.Bh8+–; 4...Bb7 5.b5 (5.Qa4 a6 6.Nc3 Nc6 7.a3 Nf6 8.d4 Bd6 9.c5) 5...Nf6 6.Nc3 a6 7.e3 ab5 8.cb5 Bd6 9.Bc4; 4...Na6 5.a3 (5.b5 Nc5 6.Nc3 Nf6 7.d4 Nce4 8.Ne5 Bb4 9.Qb3) 5...Nf6 6.Nc3 Bb7 7.d4 Bd6 8.b5 Nb8 9.g3) 5.b5 (5.Qa4 Be7 6.Nc3 0-0 7.g3 Bb7 8.Bg2 Nc6 9.b5) 5...Bb7 6.g3 (6.e3 a6= 7.Nc3 ab5 8.cb5 Bd6 9.Bc4) 6...d6 (6...Bf3 7.ef3 a6 8.f4= (8.Bd3 Bd6 9.0-0) 8...c6 9.Nc3; 6...g5 7.Rg1 g4 8.Nh4 a6 9.Nc3) 7.Bg2 e5 (7...a6 8.0-0= (8.Nc3 ab5 9.cb5) 8...ab5 9.cb5; 7...Nbd7 8.0-0 Qc8 9.Nc3) 8.d3 (8.Qc2 Qc8+= (8...Be7 9.Qf5) 9.Nc3) 8...Be7 (8...a6 9.0-0=) 9.0-0 (9.d4 e4 10.Ng5 d5=) 9...0-0 10.Nc3 Nbd7 (10...a6 11.d4 e4 12.Ng5=) 11.e4 (11.Ne5 Bg2 12.Nd7 Qd7 13.Kg2 a6+/–) 11...f4 (11...fe4 12.Ng5 Nc5 13.Nce4 Nfe4 14.Ne4 Ne4 15.Be4 Be4 16.de4=) 12.Nd5 (12.gf4 a6+=) 12...Nc5 (12...fg3 13.fg3 a6 14.a4=) 13.gf4 (13.Ne7 Qe7 14.gf4 ef4+=) 13...Nd5= 14.cd5 (14.ed5 Rf4 15.d4 ed4=) 14...Rf4 15.d4 ed4 16.Nd4 (worse is 16.Qd4 Qf8 17.Qd1 Ne4–/+) 16...Bf6 (16...a6 17.Ne2 Rh4 18.Ng3 ab5 19.Nf5+=) 17.f3 (17.Rb1 Be5= (17...Ne4?? 18.Ne6 Qe7 19.Nf4+–)) 17...Rh4 (17...a6 18.Qd2 Bg5 19.Qe2+=) 18.Qd2 Bc8 (18...a6 19.a4=) 19.f4+= Bd7 (19...Qe8 20.Rae1 Rh5 21.e5 de5 22.Nc6+=) 20.Rae1 Bd4 21.Qd4 Rg4 22.Kh1 Bb5 (22...Qh4 23.Bf3 Rg6 24.f5+/–) 23.Rg1+/– Qf6 24.Qb4?? (24.Qf6 gf6 25.h3+/– (worse is 25.Bf6 Nd3 26.Ref1 Nf4+=)) 24...Nd3–+ 25.Rgf1 (25.Qd2 Nb2 26.Rb1–+) 25...Nb4 (25...Nb2?! 26.Qb5 Qc3 27.Qe2=; worse is 25...Qb2 26.Qb2 Nb2 27.Bh3–+) 26.Bf6 Bf1 (26...Bf1 27.Rf1 gf6–+) 0–1. Borgbjerg,E (2300) – Woodward,T (2350), FSIMA August, Budapest HUN, 2006. (=1.c4 b6 2.b4 e6 3.Bb2 f5)

3.e3 Ba6 4.b5 Bb7 5.Nf3 Bf3 (5...a6!?=) 6.Qf3+= c6 (6...d5 7.c4 a6 8.cd5 ed5 9.Nc3+–) 7.c4 (7.Be2 a6+=) 7...d5 (7...a6 8.Be2+=) 8.Be2 (better 8.Nc3 Nf6 9.Rc1+–) 8...Nd7? (8...dc4 9.Na3 Ne7 10.Nc4+–) 9.cd5 (better 9.bc6!? Ndf6 10.cd5 Nd5 11.Nc3+–) 9...cd5+= 10.0-0 Be7?? (10...Ngf6 11.Rc1+=) 11.d4 (better 11.Bg7 Bf6 12.Bh8 Bh8 13.d4+–) 11...g6 (11...Ngf6 12.Rc1+=) 12.Nd2 (12.Rc1 Ngf6+–) 12...Bf6 (12...Bb4 13.Nb3+–) 13.Rac1 Rc8 (13...Ne7 14.Ba3+–) 14.Rc8 Qc8 15.Rc1 Qd8 16.e4 (16.Qg3 Be7+–) 16...Ne7 (16...Bg5 17.Rc2 Ne7 18.Ba3+–) 17.ed5 (17.Rc2 Bg7+–) 17...Nd5 18.Ne4 (18.Bc4 Bg5 19.Bd5 Bd2+–) 18...0-0 19.Nd6 (19.Bc4 Bg5 20.Re1 Be7+–) 19...Qe7 (19...Qb8 20.Qg3+=) 20.Ba3+– Bd4 (better 20...Rb8 21.Rc4 Ra8+–) 21.Nc8?? (21.Nf5 Qf6 22.Nd4 Qd4 23.Bf8 Kf8+–) 21...Qf6?? (21...Qg5 22.Na7 Ra8–/+) 22.Bf8+– Qf3? (better 22...Kf8!? 23.Na7 Qg5+–) 23.Bf3+– (23.gf3?! Nf4 24.Kf1 Kf8+–) 23...Kf8 24.Na7 (24.Rd1 Bc5 25.Bd5 ed5 26.Rd5 Nf6+–) 24...h5 (24...Nc3 25.Rc2+–) 25.Rc8 (better 25.Rd1 Bc5 26.Bd5 ed5 27.Rd5+–) 25...Ke7?? (better 25...Kg7+–) 26.Nc6 Kd6 27.Nd4 Nf4 (27...N5f6 28.Nc6+–) 28.Rc6 (28.Nc6 Nd3+–) 28...Ke5 29.Nb3 Nd5 (29...g5 30.g3 Nd5 31.Bh5+–) 30.a4 (better 30.Bd5 ed5 31.Nd2+–) 30...Kf6 (30...Nb4 31.Nd2+–) 31.a5 (better 31.Bd5 g5+–) 31...ba5 32.Na5 (32.Bd5 a4 33.Nc5 Nb8+–) 32...Ke7 (32...N5b6 33.Nc4 Nc4 34.Rc4+–) 33.Bd5 ed5 34.Rc7 (better 34.b6!? Nb6 35.Rb6 Kd7+–) 34...Kd8 35.Rb7 (35.Ra7 f6+–) 35...d4 36.Nc6 Kc8 37.Ra7 d3 38.Ne7 (38.Kf1!? g5+–) 38...Kd8 39.Nd5 d2 (39...Nc5 40.Kf1 h4 41.Rf7+–) 40.Ra8 Nb8 41.Rb8 Kd7 42.Ne3 (42.Nc3 Kc7 43.Re8 Kd7+–) 42...Kc7 43.Rf8 Kb6 44.Rb8 Kc5?? (44...Kc7 45.Re8 h4+–) 45.b6 Kc6 (45...h4 46.Kf1+–) 46.b7 (46.Kf1 d1Q 47.Nd1 g5+–) 46...Kc7 (46...f5 47.Rd8 Kb7 48.Rd2+–) 47.Rf8 Kb7 48.Rf7 Kb6 49.Rf6 Kc5 50.Rg6 Kd4 51.Rc6 (51.Rd6 Kc3 52.f4 h4+–) 51...Kd3 52.Kf1 h4 53.f4 (better 53.Rh6!? h3+–) 53...h3 (53...Ke3 54.Rd6 Kf4 55.Rd2+–) 54.g3 (better 54.Kf2 hg2 55.Rd6 Ke4 56.Ng2 Kf5+–) 54...d1Q (54...Ke3 55.Rd6 Ke4 56.Rd2 Kf5+–) 55.Nd1 Kd2 56.Rd6 (56.Nf2 Ke3 57.Rd6 Kf3 58.Rd3) 56...Kc2+– 57.f5 Kc1 (57...Kb3 58.f6 Kb4 59.f7 Kc4 60.f8Q Kb4 61.Rd5 Kb3 62.Qb8 Ka4 63.Nc3 Ka3 64.Ra5) 58.f6 Kc2 (58...Kb1 59.f7 Kc2 60.f8Q Kb3 61.Qb8 Kc4 62.Qc7 Kb4 63.Rb6 Ka4 64.Qa7) 59.Ke2 (59.f7 Kb3 60.Rc6 Kb4 61.f8Q Kb5 62.Qc5 Ka4 63.Ra6 Kb3 64.Qc3) 59...Kb3 60.Rc6 Kb4 61.Kd2 (61.f7 Kb5 62.Rc8 Ka6 63.Rb8 Ka5 64.f8Q Ka4 65.Qb4) 61...Kb5 62.Rc8 Kb6 (62...Ka4 63.f7 Kb5 64.f8Q Ka6 65.Qf6 Ka5 66.Qb2 Ka4 67.Ra8) 63.Kc3 (63.f7 Ka7 64.f8Q Kb6 65.Qf6 Ka5 66.Qb2 Ka4 67.Ra8) 63...Kb7 (63...Kb5 64.f7 Ka6 65.Rb8 Ka5 66.f8Q Ka4 67.Qb4) 64.Rc4 Kb6 (64...Ka7 65.f7 Kb8 66.f8Q Ka7 67.Qa3 Kb7 68.Qb3 Ka6 69.Ra4) 65.Nb2 (65.f7 Ka6 66.f8Q Ka7 67.Qa3 Kb7 68.Qb3 Ka6 69.Ra4) 65...Kb5 (65...Ka6 66.f7 Kb6 67.f8Q Ka7 68.Qa3 Kb7 69.Qb3 Ka6 70.Ra4) 66.Na4 (66.f7 Kb6 67.f8Q Ka7 68.Rc7 Kb6 69.Qd6 Kb5 70.Rc5) 66...Ka5 (66...Ka6 67.f7 Kb5 68.f8Q Ka6 69.Qa8 Kb5 70.Rc5) 67.Rb4 Ka6 68.Kc4 (68.f7 Ka7 69.Nc5 Ka8 70.f8Q Ka7 71.Rb7) 68...Ka5 (68...Ka7 69.f7 Ka8 70.f8Q Ka7 71.Qc5 Ka6 72.Qb6) 69.Kc5 (69.Rb7 Ka6 70.Nc5 Ka5 71.Rb5) 69...Ka6 70.Rb8 (70.Rb6 Ka5 71.f7 Ka4 72.f8Q Ka5 73.Qa8) 70...Ka7 71.Rb2 (71.f7 Kb8 72.Kb6 Kc8 73.f8Q Kd7 74.Nc5) 71...Ka6 (71...Ka8 72.f7 Ka7 73.f8Q Ka6 74.Qa8) 72.Nc3 Ka5 (72...Ka7 73.f7 Ka6 74.f8Q Ka7 75.Qe7 Ka6 76.Ra2) 73.Ra2 1–0. DEFFM – GuestGZHT, freechess.org, 2016.

3.e3 c6 4.Nf3 d6 5.Be2 e5 6.c4 f6 7.Nc3 a6 8.Qc2 g6 9.0-0 f5 10.e4 f4 11.c5! bc5 (11...bc5 12.bc5 Combination; 11...dc5 12.Ne5 Deflection) 12.bc5 dc5 (12...Nf6 13.Na4 Bg4 14.Nb6+–) 13.Ne5 Ne7 (13...Bd6 14.Nf3 Bc7+–) 14.Qb3 a5 (14...Qd4 15.Nc4 Qd8+–) 15.Qf7 1–0. b4_player – juanorte, casual, 2013.

3.e3 d5 (--> 1.b4 d5 2.Bb2 e6 3.e3 b6).

3.e3 d6 4.Nf3 e5 5.d4 e4= 6.Nfd2 d5 7.c4 c6 8.cd5 cd5 9.Nc3 Bd7 10.b5 Be6 11.a3 Ne7 12.Be2 g6? 13.Bg4 Bg4 14.Qg4 Bg7 15.0-0 Qd7 16.Rfe1?? 0-0 17.Qd7= Nd7 18.Ne2 a6 19.ba6 Ra6 20.Nf4 g5=+ 21.Nh5 f5 22.a4 Nf6 23.Nf6 Bf6=+ 24.Ba3 Rfa8 25.Be7=+ Be7 26.f3? Ra4 27.fe4?? Ra1 28.ef5 Re1 29.Kf2 Rea1 30.Nf3 R1a2 31.Kg3 Kf7 32.Ne5 Kf6 33.Nd7 Kf7 34.Nb6?? Rb8 35.Nd5 Rbb2 36.e4 h5 37.Ne3–+ Ra3 38.Kf3 Bb4 39.h3 Bd2 40.e5 Re3 41.Kf2 Rd3 42.Ke2 Rdb3 43.d5 Bf4 44.Kd1 Ra3 45.e6 Ke7 46.f6 Kf6 47.d6 Ra1# 0–1. badboy1221 – ribsnrice, Live Game Caissa's Web, 2006.

3.e3 h5 4.Nf3 h4 5.h3 Bd6? (better is 5...Nf6!? 6.a3 d5+=) 6.Bg7+– Rh7 7.Bc3 Bb7 8.Be2 a5 9.ba5 ba5 10.Bb2 c6 (10...Nc6 11.0-0+–) 11.c4 Ba6 12.Qc2 Rh6 13.c5 (better is 13.0-0+–) 13...Bc5?? (better is 13...Be2 14.Ke2 Be7+/–) 14.Qc5+– Be2 15.Ke2 Na6 16.Qc3 Nb4 17.a3 Nd5 18.Qg7 Ndf6 (18...Rg6 19.Qh8 Nde7+–) 19.Bf6 Rf6 20.Qg8 Ke7 21.Qg5 Qb6 (21...Qg8 22.Qg8 Rg8 23.Nh4+–) 22.Nc3 Qb2 (22...d5+–) 23.Rab1 Qa3 24.Ne4 d5 25.Qf6 (25.Rb7 Kf8 26.Nf6 Qe3 27.fe3 a4 28.Qg8) 25...Kd7 26.Qf7 Qe7 (26...Kd8 27.Ne5 Qd3 28.Kd3 de4 29.Ke4 a4 30.Qd7) 27.Ne5 (27.Rb7 Kc8 28.Re7 de4 29.Qf8) 27...Kd8 28.Nf6 (28.Nc6 Kc8 29.Qe7 de4 30.Qd8) 28...Ra7 (28...Qf7 29.Nf7 Ke7+–) 29.Rb8 (29.Qg8 Qf8 30.Qf8 Kc7 31.Qb8) 29...Kc7 30.Qe7 (30.Qe7 Kb8 31.Qd8 Kb7 32.Rb1 Ka6 33.Qb6) 1–0. GuestHKRL – Xali, freechess.org, 2017.

3.e4 a5 A) 4.ba5 A1) 4...ba5 5.Nc3 (5.Nf3 Nc6 6.Nc3 Nf6 7.Rb1 Rb8 8.Bc4 Bb4 9.0-0) 5...Nc6 6.Nf3 Nf6 7.Rb1 Bb4 8.Bd3 Ba6 9.Ba6; A2) 4...Nf6 5.e5 (5.ab6 Nc6 6.e5 Ne4 7.Nc3 Nc3 8.Bc3 Bc5 9.bc7) 5...Nd5 6.c4 Nb4 7.ab6 Qh4 8.d3 Bc5 9.g3; A3) 4...Ra5 5.Nc3 (5.Nf3 Nf6 6.e5 Nh5 7.Bc3 Ra4 8.d4 Nc6 9.Bb5) 5...Nc6 6.Nf3 Nf6 7.Bc4 Bb4 8.a3 Be7 9.0-0; B) 4.b5 B1) 4...Nf6 5.Nc3 (5.Bd3 Bb7 6.Nc3 a4 7.a3 Bc5 8.Nf3 d6 9.0-0) 5...Bb7 6.e5 Ne4 7.Ne4 Be4 8.Nf3 c6 9.Be2; B2) 4...Bb7 5.Nc3 (5.Bd3 Nf6 6.Nc3 a4 7.a3 Bc5 8.Nf3 d6 9.0-0) 5...Nf6 6.e5 Ne4 7.Ne4 Be4 8.Nf3 Bb4 9.Bc4; B3) 4...a4 5.Nf3 (5.Nc3 Bb7 6.Nf3 a3 7.Bc1 Nf6 8.e5 Nd5 9.Be2) 5...Bb7 6.Bd3 Nf6 7.e5 Nd5 8.0-0 Nf4 9.Na3.

3.e4 a6 A) 4.a3 A1) 4...c5 5.Nf3 (5.bc5 Nc6 6.Nf3 bc5 7.Nc3 Nf6 8.Bd3 Bd6 9.0-0) 5...Nc6 6.bc5 Nf6 7.Nc3 bc5 8.Rb1 Bd6 9.Bd3; A2) 4...Bb7 5.Nf3 (5.Nc3 Nc6 6.Nf3 Nf6 7.e5 Nh5 8.Bc4 b5 9.Be2) 5...a5 6.Nc3 Nf6 7.e5 ab4 8.ab4 Ra1 9.Qa1; A3) 4...a5 5.b5 (5.Nf3 ab4 6.ab4 Ra1 7.Ba1 Bb7 8.b5 Be4 9.Nc3) 5...Nf6 6.Nc3 Bb7 7.Bd3 d5 8.e5 Ne4 9.Nf3; B) 4.Bd3 B1) 4...Nf6 5.a3 (5.e5 Nd5 6.Nc3 Nc6 7.Nd5 ed5 8.a3 Qg5 9.Kf1) 5...Bb7 6.Nc3 Nc6 7.Nf3 Bd6 8.Qe2 Ne5 9.0-0; B2) 4...Nc6 5.a3 (5.Nf3 Nb4 6.Nc3 Bb7 7.Bc4 Nf6 8.a3 Nc6 9.0-0) 5...Nf6 6.Nf3 Be7 7.0-0 0-0 8.Nc3 d6 9.Ne2; B3) 4...Bb7 5.Nf3 (5.a3 Nf6 6.Nc3 Nc6 7.Nf3 Bd6 8.0-0 0-0 9.Qe2) 5...Nf6 6.Nc3 Bb4 7.e5 Nh5 8.g3 0-0 9.0-0; C) 4.Nc3 C1) 4...Nc6 5.a3 (5.b5 ab5 6.Bb5 Nf6 7.Nf3 Be7 8.e5 Nh5 9.0-0) 5...Nf6 6.Nf3 Be7 7.d4 d5 8.Bd3 de4 9.Ne4; C2) 4...Bb7 5.a3 (5.Nf3 Bb4 6.Bd3 Nc6 7.a3 Bd6 8.Nb5 Bf8 9.Nbd4) 5...Nc6 6.Nf3 Nf6 7.e5 Nh5 8.Bc4 b5 9.Be2; C3) 4...Bb4 5.a3 (5.Nf3 Nc6 6.a3 Be7 7.Bd3 Nf6 8.0-0 0-0 9.Qe2) 5...Be7 6.Nf3 Nc6 7.Bd3 Nf6 8.e5 Nh5 9.g3; D) 4.Nf3 D1) 4...Nc6 5.a3 (5.Nc3 Bb4 6.a3 Be7 7.Bd3 Nf6 8.e5 Nh5 9.0-0) 5...Nf6 6.Nc3 Be7 7.Bd3 0-0 8.0-0 d6 9.Ne2; D2) 4...Nh6 5.a3 (5.Bd3 Nc6 6.a3 f6 7.Nd4 Nd4 8.Bd4 a5 9.b5) 5...Bb7 6.Bd3 Nc6 7.0-0 f6 8.Nd4 Nf7 9.Qh5; D3) 4...Bb7 5.Bd3 (5.Bc4 Nf6 6.e5 Ne4 7.Nc3 Bb4 8.Ne4 Be4 9.a3) 5...Nf6 6.0-0 Bb4 7.Nc3 Nc6 8.e5 Nh5 9.g3.

3.e4 Bb4 4.a3 Bf8 5.a4 Bb7 6.Nc3 d5 7.f3 a6 8.Nge2 Bd6 9.d4? Ne7 10.Qd2 Bb4 11.e5 Nd7 12.g3 c5–+ 13.Bh3 cd4 14.Nd4 Nf8?? 15.Qd3 Nc6 16.0-0?? Bc5 17.f4? Qc7 18.Kh1?? Nd4 19.Ne2 Nc6 20.Rfd1 0-0-0 21.c3 Ne7 22.c4 dc4 23.Bg2 Rd3 24.Bb7 Qb7# 0–1. Gregor123 – chiha, mySchach.de, 2004.

3.e4 Nf6 4.e5 (4.Nf3 A) 4...Ne4 5.Bd3 (5.Nc3 Bb7 6.a3 Ng5 7.Be2 Qf6 8.Ng5 Qg5 9.Bf3) 5...Bb7 6.Nc3 Ng5 7.b5 Nf3 8.gf3 a6 9.Qe2; B) 4...Bb7 5.a3 (5.e5 Ne4 6.b5 Bc5 7.d4 Be7 8.Bd3 a6 9.0-0) 5...Be4 6.Nc3 Bg6 7.Bc4 Nc6 8.0-0 Bd6 9.Nb5; C) 4...Bb4 5.a3 (5.e5 Nh5 6.a3 Ba5 7.Nd4 Qg5 8.Qf3 Qe5 9.Be2) 5...Bc5 6.e5 Nh5 7.d4 Be7 8.Nc3 Bb7 9.Bb5; 4.Nc3 A) 4...Bb7 5.e5 (5.a3 Ne4 6.Nf3 Ng5 7.Be2 Qf6 8.Ng5 Qg5 9.Bf3) 5...Ne4 6.Qf3 Nd6 7.Qh3 Nf5 8.Bd3 Nc6 9.Nf3; B) 4...h5 5.b5 (5.Nf3 Bb4 6.e5 Bc3 7.dc3 Ne4 8.Bd3 Bb7 9.0-0) 5...Bb7 6.e5 Ne4 7.Nf3 a6 8.a4 Bc5 9.Ne4; C) 4...Bb4 5.e5 (5.Nf3 Nc6 6.Bd3 0-0 7.0-0 Ng4 8.Nb5 f6 9.Nbd4) 5...Bc3 6.dc3 Nd5 7.c4 Ne7 8.Nf3 0-0 9.Bd3; 4.b5 A) 4...Bb7 5.e5 (5.Nc3 Ne4 6.Nf3 a6 7.Ne4 Be4 8.a4 Bd6 9.d3) 5...Ne4 6.d3 Nc5 7.Nc3 Qh4 8.Nge2 Be7 9.d4; B) 4...a6 5.e5 (5.Nc3 ab5 6.Bb5 Nc6 7.Nf3 Bb4 8.e5 Nh5 9.0-0) 5...Ne4 6.Nc3 Nc3 7.Bc3 ab5 8.Bb5 Nc6 9.Nf3; C) 4...Ne4 5.Nc3 (5.Bd3 Nc5 6.Nf3 Nd3 7.cd3 a6 8.Nc3 Bb7 9.0-0) 5...Bb7 6.Nf3 a6 7.Ne4 Be4 8.Qe2 f5 9.Ne5) 4...Nd5 5.b5 (5.Nc3 Bb7 6.b5 Nc3 7.Bc3 a6 8.Nf3 ab5 9.Bb5; 5.Nf3 Bb4 6.c4 Ne7 7.a3 Ba5 8.Nc3 Ng6 9.d4) 5...c5 (better is 5...Qh4!?= 6.Nf3 Qb4 7.Bd4 Bc5 8.a3 Qa4 9.Bc5) 6.c4+/– Nf4?? (better is 6...Nc7+/– 7.Nf3 Bb7 8.Bd3 d6 9.Nc3) 7.Qf3+– 1–0. Pies,Gerhard – Seelig,Jochen, Leverkusen op, 2004.

3.e4 Nh6 A) 4.b5 A1) 4...a6 5.Nf3 (5.Nc3 ab5 6.Bb5 Nc6 7.Nf3 Bd6 8.0-0 0-0 9.d4) 5...Bb7 6.Nc3 ab5 7.Bb5 Nc6 8.0-0 Bd6 9.Bc4; A2) 4...c6 5.Nf3 (5.a4 d5 6.Bd3 a6 7.Nc3 ab5 8.ab5 Ra1 9.Qa1) 5...a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Bb7 9.Nc3; A3) 4...Bb7 5.Nc3 (5.Nf3 a6 6.Nc3 ab5 7.Bb5 Nc6 8.0-0 Bd6 9.Bc4) 5...a6 6.Nf3 ab5 7.Bb5 Nc6 8.0-0 Bd6 9.Bc4; B) 4.Bc4 B1) 4...Nc6 5.Nf3 (5.b5 Na5 6.Bd3 a6 7.a4 Qg5 8.Nf3 Qh5 9.0-0) 5...Ng4 6.h3 Nf6 7.b5 Na5 8.Bd3 a6 9.e5; B2) 4...Bb7 5.Nf3 (5.Nc3 Nc6 6.Nf3 Bb4 7.a3 Bd6 8.Nb5 0-0 9.0-0) 5...Be4 6.0-0 Nc6 7.Re1 Bf3 8.Qf3 Nb4 9.Bb3; B3) 4...Qe7 5.Bc3 (5.a3 a5 6.b5 f5 7.ef5 Nf5 8.Nf3 d5 9.Bd3) 5...Nc6 6.Nf3 d5 7.b5 Qc5 8.Qe2 dc4 9.bc6; C) 4.Nc3 Bb4 5.Qh5 (5.a3 Be7 6.Qh5 0-0 7.Nf3 f5 8.Bd3 Na6 9.Na4) 5...Ng8 6.e5 Nc6 7.Ne4 Nge7 8.Nf3 h6 9.a3; D) 4.Nf3 D1) 4...a6 5.a3 (5.Bd3 Nc6 6.a3 f6 7.0-0 Bd6 8.Nd4 0-0 9.Nc6) 5...Nc6 6.Be2 f6 7.d4 Bd6 8.0-0 0-0 9.Nbd2; D2) 4...Na6 5.a3 (5.Bc4 Nb4 6.0-0 Bb7 7.Nc3 Be7 8.a3 Nc6 9.d4) 5...Bb7 6.Bd3 c5 7.Qe2 Nc7 8.0-0 Ng4 9.h3; D3) 4...Bb7 5.Bd3 (5.b5 a6 6.Nc3 ab5 7.Bb5 Nc6 8.0-0 Bd6 9.Bc4) 5...Nc6 6.a3 f6 7.b5 Na5 8.Nc3 Bd6 9.0-0.

3.f3 Ba6 4.e4 Nf6 (4...Bf1 5.Kf1 Nf6 6.a3+=) 5.Ba6 Na6 6.b5 Nc5 7.Nc3 d5 8.d4 Nb7 9.Nge2 de4 10.fe4 Nh5 (10...a6!? 11.a4 Ng4=) 11.0-0+/– e5 (better is 11...Nf6!?+/–) 12.Rf5+– g6? (better is 12...Nf6 13.Re5 Be7+–) 13.Re5 Be7 (13...Kd7 14.Rd5 Nd6+–) 14.Nd5 0-0 15.Re7 c6 (15...Nd6 16.Qd3 a6 17.Rc7+–) 16.bc6 (16.bc6 Na5 17.Rd7+–) 1–0. pierre – tyrg, internet, 2011.

3.f3 Qh4 4.g3 Qb4 5.Bc3 Qe7 6.e4 Nf6 7.d3 Nc6 8.Ne2 Ba6 9.Bg2 h5 10.0-0 h4 11.Nf4 Qc5 12.d4 (better is 12.Rf2–+) 12...hg3 13.hg3 (13.dc5?? Bc5 14.Bd4 Bd4 15.Qd4 Nd4–+) 13...Qg5 14.Kf2 Bf1 15.Qf1 e5 16.de5 Bc5 17.Ke2 Ne5 18.Nd2 (18.Kd1–+) 18...Nh5 19.Be5 (19.Nh5 Qe3 20.Kd1 Qc3 21.Ng7 Kf8 22.Rb1 Kg7 23.Qe2–+) 19...Ng3 (19...Ng3 20.Kd3 Qe5–+) 0–1. dariuscyclone (2000) – pierred (2765), net–chess.com, 2011.

3.Nf3 Ba6 4.a4 c6 (4...Bb4?? 5.Bg7 Nf6 6.Bh8+–) 5.Na3 Nf6 (5...Bb4?? 6.Bg7 f6 7.Bh8+–) 6.b5 Bb7 (6...Ba3 7.Ra3 cb5 8.g4+=) 7.Nc4 Ne4 8.e3 a6 9.Bd3 cb5 10.ab5 a5 (better is 10...ab5 11.Ra8 Ba8=) 11.Be4+/– Be4 12.Bd4 Bc5?? (better is 12...a4+/–) 13.Bc5+– bc5 14.Nd6 Ke7 15.Ne4 Qc7 16.Qb1 d5 (16...d6 17.Qb2 Kf8 18.0-0+–) 17.b6 Qb7 18.Nc5 Qc6 19.Na4 Nd7 20.Nd4 Qb7 21.Qb5 Rhc8 22.0-0 g6 (22...h6 23.Rfb1+–) 23.f4 f5 (23...Kd8 24.c3+–) 24.Rf3 Ra6 25.Rh3 h5 26.Rb1 Nc5 (26...Raa8+–) 27.Nc5 Rc5 28.Qc5 (28.Qc5 Kf7 29.Qc7 Qc7 30.bc7+–) 1–0. pierre – Pahan, internet, 2011.

3.Nf3 Na6 4.a3 c5 5.b5 (5.bc5 Nc5 6.d4 Na4=) 5...Nc7= 6.e4 d5 7.ed5 Nd5 (7...ed5 8.Be2=) 8.Nc3 (8.Be2 Ngf6=) 8...Nc3 (8...Ngf6 9.Nd5 Qd5 10.Qe2=) 9.Bc3 Bb7 10.Bd3 Nf6 11.0-0 Bd6 12.Qe2 Qc7 (12...Nd5 13.Be5=) 13.g3 (13.Bf6 gf6 14.Be4=) 13...a6 (better is 13...0-0!? 14.Bf6 gf6=) 14.ba6+/– Bf3 (14...Bc6 15.Ne5 Bd5 16.Nc4+/–) 15.Qf3 0-0 16.Bf6 gf6 17.Rfe1 (17.Rab1+/–) 17...c4? (better is 17...f5!? 18.Bc4 Rfd8+/–) 18.Re4 (better is 18.Qg4 Kh8 19.Qc4+–) 18...cd3?? (better is 18...f5 19.Rc4 Qd7+–) 19.Rg4 Kh8 20.Qf6 1–0. pierre – dezem, internet, 2009.

3.Nf3 d6 (--> 2.Bb2 d6 3.Nf3 b6).

3.Nf3 f6 4.b5 d5 5.e3 Bb7 6.Be2 c5 7.0-0 e5 8.c4 d4 9.ed4 cd4 10.d3 Bc5 11.Nfd2 Nd7 12.Bh5 g6 13.Bf3 Bf3 14.Nf3 Ne7 15.Nbd2 Nf8 16.Ne4 Nd7 17.Nfd2 Qc7 18.Qf3 f5?? 19.Ng5 Rc8+= 20.Ne6 Qd6 21.Ng7?? Kf7 22.Nh5 gh5–+ 23.Qh5 Qg6 24.Qf3 Qe6 25.Ne4 Rhg8 26.Qh5 Qg6 27.Qg6 Ng6 28.Nc5 Nc5 29.Rad1 Nf4 30.g3 Nfd3 31.Bc1 e4 32.Kh1 Ne5 33.f4 Nf3 34.Kg2 Rcd8 35.Ba3 Ne6 36.Bb2 d3 37.Be5 Ned4 38.a4 Rc8 39.a5 Rc4 40.ab6 ab6 41.Ra1 Rc2 42.Rf2 d2 43.Ra7 Kg6 44.Bd4 Nd4 45.Rd2 Rd2 46.Kf1 e3 47.Ke1 Nf3 48.Kf1 Rd1 49.Ke2–+ Rgd8 50.Ke3 R8d3 51.Ke2 Nh2 52.Rg7 Kg7 53.g4 R1d2 (54.Ke1 Nf3 55.Kf1 Re3 56.gf5 Re1#) 0–1. GULP – grigoropoulo3, caissa.com, 2004.

3.Nf3 h6 4.e3 a6 5.a3 Bb7 6.Be2 d6 7.0-0 Nd7 8.d3 Rh7 (8...Ngf6 9.c4+=) 9.c4 a5 (9...Ngf6 10.d4+=) 10.d4+/– Ne7 (10...ab4 11.ab4 Ra1 12.Ba1+/–) 11.Nc3 g6 12.b5 Bg7 13.e4 e5 14.de5 Ne5 15.Nd4 Nd7 16.Nd5 Nd5 (16...Nc5 17.Qc2+/–) 17.cd5 Qe7 18.Bd3 Nc5 19.Qc2 (19.Rc1 Be5+/–) 19...Be5 (19...0-0-0 20.Rae1+/–) 20.f4 Bd4 (20...Bg7 21.Rae1 0-0-0 22.Qc4+/–) 21.Bd4+– 0-0-0 22.Bc5 (22.Rac1 Re8+–) 22...dc5+/– 23.Rac1 f6 (23...Rg7 24.Rfd1+/–) 24.f5 (24.Kh1 Kb8+/–) 24...g5 25.Qe2 Kb8 26.Rc4 Bc8 27.Rfc1 (27.Qb2 Re8+/–) 27...Rhh8 (27...Bd7 28.R4c3+/–) 28.Qc2 Rd6 (28...Rhe8 29.Kh1+/–) 29.Rc3 (29.Qb3 Re8 30.R1c2 Bf5 31.ef5 Qe3 32.Rf2 Rd5+=) 29...Re8 30.Qd1 Qf7 (30...Qe5 31.Qf3+/–) 31.Rc4 (31.Qa4 Re5+/–) 31...Bd7 32.Qa4 Re5 33.R4c2 Kb7 (33...Qh5 34.Qc4+/–) 34.Rc3 Re8 (34...Qh5 35.Qc4+/–) 35.Rc4 (35.Kh1 Qh5+/–) 35...Re5 36.Kh1 Qh7 37.Qb3 h5 38.Kg1 (38.Qa4 Qe7 39.R4c2 h4+/–) 38...h4 39.Qa4 h3 40.g3 Qh5 41.Rf1 Qg4 42.Kf2 Be8?? (better is 42...Qh5+/–) 43.Be2+– Qe2 (43...Rf5 44.ef5 Qf5 45.Kg1+–) 44.Ke2 Bh5 (44...Rdd5 45.Re1 Rd8+–) 45.Kf2 Bf7 (45...Rd7 46.Rfc1+–) 46.Kg1 (46.g4 Rd8+–) 46...Rd7 (46...Bh5 47.Qc2+–) 47.g4 Rde7 48.Rf3 Re8 49.Rd3 Rd8 (49...Rh8 50.Qb3+–) 50.Rh3 Rd6 51.Rh7 Re7 52.Rh8 Be8 53.Rf8 Kc8 (53...Bd7 54.Kg2+–) 54.Qc2 Kd7 (54...Kb7 55.Qb2 Bf7 56.Rh8+–) 55.Qb2 Bf7 (55...Bf7 56.h4! gh4+–). market (2240) – mirage (1660), GameColony.com, 2002.

3.h4 Bb7 4.h5 Be7 5.Bg7 Bf6 6.Bh8 Bh8 7.c3 d5 8.h6 Nd7 9.Qc2 c5 10.Qh7 Ndf6 11.Qh8 Qe7 12.h7 0-0-0 13.Qg7 Nh7 14.Rh7 cb4 15.Rh8 f6 16.Qg4 Qf7 17.Rh3 Ne7 18.cb4 d4 19.a3 Rg8 20.Qd4 Bg2 21.Qc4 Kb7 22.Bg2 Rg2 23.Qe4 Nd5 24.Qg2 Kc7 25.Qh2 Kd7 26.Rh7 Qh7 27.Qh7 Kd6 28.Nc3 Nc3 29.dc3 a5 30.ba5 ba5 31.Rd1 Ke5 32.Qh5 f5 33.Nf3 Ke4 34.Qh4 f4 35.Rd4 Kf5 36.Qh7 Kg4 37.Qg7 1–0. FelixMart – axtur777 , lichess.org, 2019.

(--> 1.b4 b6 2.Bb2 Bb7 3.a3 e6).

4.e3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7).

4.e3 Nf6 5.Nf3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7).

4.Nf3 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.a3).

4.Nf3 f6 5.e3 (--> 1.b4 b6 2.Bb2 Bb7 3.e3 f6 4.Nf3 e5 5.a3).

(--> 1.b4 b6 2.Bb2 Bb7 3.a4 e6).

4.Nf3 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.a4).

4.b5 c5 5.Nf3 f5 6.e3 Qd7?? 7.Ne5+– Qd6 8.Qh5 g6 9.Ng6! e5 10.Nh8 Kd8 11.Nf7 Ke7 12.Nd6 Kd6 13.Qf7 c4 1–0. guest449 – maanjongen, ICC, 2003.

4.g3 c5 (4...Bb4?? 5.Bg7 Nf6 6.Bh8+–) 5.bc5 Bc5?? (better is 5...bc5 6.Bg2 Nc6=) 6.Bg7+– f6 (6...Bd4 7.Bd4 Nf6 8.e3+–) 7.e3 Qe7 8.Bh8 Qf7 9.a5 b5 (9...ba5 10.d4 Bb4 11.c3+–) 10.Bb5 Bd7 11.Nc3 Nc6 12.Rb1 0-0-0 (12...Na5 13.Ba6 Nh6+–) 13.Ba6 Kc7 14.Nb5 Kb8 15.Nd6 Ka8 16.Bb7 Kb8 17.Nf7 Nb4 18.Nd8 Kc7 19.Qg4 Kd8 20.Qg8 Kc7 21.Qh7 Kb7 22.Qd7 Ka6 23.d4 (23.c3 Nc2 24.Ke2 Bb6 25.ab6 ab6 26.Qb5 Kb7 27.Qb6 Kc8 28.Qc6 Kd8 29.Bf6) 23...Ka5 (23...Be7 24.Qe7 Kb5 25.Qb7 Ka5 26.Qb4 Ka6 27.Qb5) 24.Ra1 Kb6 (24...Na2 25.Ra2 Kb6 26.Rb2 Bb4 27.Rb4 Ka5 28.Qb5) 25.Qa7 Kb5 (25...Kc6 26.Qc5 Kd7 27.Ra7 Ke8 28.Qe7) 26.Qc5 1–0. Janek – wpis, internet, 2016.

4.b5 a6 (4...d5 5.Nf3= (5.e3 Nbd7 6.Nf3 Bd6 7.Nc3 0-0 8.Be2 Nc5 9.0-0) 5...Nbd7 6.Nc3 Bd6 7.g3 Bb7 8.Nd4 Ne5 9.e3; 4...Bc5 5.Nf3 (5.e3 0-0 6.Nf3 d6 7.d4 Bb4 8.Nbd2 d5 9.Bd3) 5...d5 6.e3 Nbd7 7.Bd3 0-0 8.0-0 Qe7 9.Nc3; 4...Bb7 5.Nf3 (5.Nc3 Bb4 6.Nf3 0-0 7.g3 d5 8.Bg2 Qd6 9.0-0; 5.e3 d5 6.Nc3 Nbd7 7.Nf3 Bb4 8.Be2 0-0 9.0-0) 5...Bb4 6.Nc3 0-0 7.e3 d5 8.Bd3 Nbd7 9.Nd4; 4...Bd6 5.Nf3 (5.Nc3 0-0 6.Nf3 Bb7 7.e3 Ng4 8.Be2 a5 9.h3; 5.e3 0-0 6.Nc3 Bb7 7.Nf3 a6 8.Bd3 Qe7 9.a5; 5.Na3 0-0 6.Nf3 Bc5 7.e3 d5 8.Bd3 Bb7 9.Ne5) 5...Bb7 6.Nc3 0-0 7.e3 Ng4 8.Bc4 a6 9.h3; 4...a5 5.Nf3 (5.Nc3 d5 6.e3 Nbd7 7.Nf3 Nc5 8.Nd4 Bd6 9.Bd3; 5.e3 d5 6.Nf3 Bd6 7.Bd3 Nbd7 8.Nd4 Ne5 9.Nc3) 5...d5 6.c4 Bb4 7.cd5 ed5 8.g3 0-0 9.Bg2) 5.Nf3 (5.Nc3 d5= (5...Bb7 6.Nf3 Bd6 7.e3 0-0 8.Bd3 Qe7 9.a5) 6.e3 Bd6 7.Nf3 0-0 8.a5 ba5 9.Ra5) 5...h6 (5...ab5 6.ab5 Ra1 7.Ba1= d5 8.e3 Nbd7 9.Nd4) 6.e3 (6.Nc3 d5= (6...Bb7 7.e3 Bd6 8.Be2 0-0 9.0-0) 7.e3 Bd6 8.a5 0-0 9.ab6) 6...Bb7 (6...ab5 7.ab5 Ra1 8.Ba1= Bb7 9.Bd3) 7.Be2 (7.Nc3 d5+= (7...Bd6 8.Be2 0-0 9.0-0) 8.a5 c6 9.ba6) 7...Bd6 (7...ab5 8.ab5 Ra1 9.Ba1=) 8.0-0 (8.Nc3 0-0+= 9.0-0) 8...c6 (8...ab5!? 9.ab5 Ra1 10.Ba1 Ng4+=) 9.Na3+/– 0-0 10.c4 (10.Nc4 Bc7+=) 10...Ba3 (10...Qe7 11.Bd3=) 11.Ra3+= d6 12.ba6 (12.Qb1 c5+=) 12...Na6+= 13.Bf6 (13.Qb3 Nc5 14.Bf6 gf6+=) 13...Qf6= 14.Qb1 Qd8 (14...Qe7 15.Rb3+=) 15.Rb3 Nc5 (15...b5 16.ab5 Nc5 17.Rb4+=) 16.Rb6+/– Qe7?? (better is 16...Ba6+/–) 17.d4+– Na4 (17...Rfb8 18.dc5 dc5 19.Qb3+–) 18.Rb7 Qd8 (18...Qe8 19.Qc2 c5 20.d5+–) 19.Qc2 c5 (19...Ra5 20.Rfb1 c5 21.Bd3+–) 20.Bd3 (better is 20.Ra1 Qc8 21.Rb5+– (21.Ra4?! Qb7 22.dc5 Ra4 23.Qa4 dc5+–)) 20...f6 (20...Qc8 21.Rb5 cd4 22.ed4 Qc7+–) 21.Bh7 Kh8 22.Qg6 (22.Qg6 Rg8 23.Bg8 Qg8 24.Ra1+–) 1–0. marekt – Stallan, ChessWorld.net, 2003.

4.e3 Be7 5.b5 0-0 6.Be2 Bb7 7.Nf3 c6 8.0-0 cb5 (8...a6 9.Nc3=) 9.ab5 d5 10.c4 (10.Bd4 Qc7=) 10...Nbd7 11.d4 dc4 12.Bc4 Bd5 13.Nbd2 Bb4 14.Bd3 Ba5 15.Ba3 Re8 16.Rc1 Qb8 17.e4 Bb7 18.e5 Nd5 19.Nc4 (19.Ng5 g6 20.Nc4 Bb4 21.Bb4 Nb4+–) 19...Bb4 20.Bb4 Nb4 21.Nd6 Rf8 (better is 21...Nd3 22.Qd3 Re7+/–) 22.Bh7! Kh8? (22...Kh7 23.Ng5 Double attack) 23.Ng5 (23.Nb7 Qb7 24.Ng5 g6+–) 23...g6 24.Ndf7 Rf7 (24...Kg7 25.Nd6 Bd5 26.Qg4+–) 25.Bg6 Rg7 (25...Rf3 26.Nf3 Qd8+–) 26.Qh5 Kg8 27.Bf7 Kf8 28.Ne6 Ke7 29.Ng7 Qf8 30.Nf5 Kd8 31.Qg5 Nf6 32.Qf6 Kd7 (32...Qe7 33.Qe7) 33.e6 1–0. DEFFM – troubadour, freechess.org, 2018.

4.a4 ab5 5.ab5 Ra1 6.Ba1 c6 7.c4 cb5 8.cb5 Qg5 9.e3 Nf6 10.Nf3 Qf5 11.Nc3 Ng4 (11...Bb7!?=) 12.Na4 (better 12.Qa4+–) 12...Ne5?? (better 12...Bb7+–) 13.Ne5 f6 14.Bd3 (14.Nf3 Bc5+–) 14...Qg5 15.Qc2 Bb7 16.Qc7 Qg2 17.Qc8 (better 17.Qb8 Ke7 18.Rf1 fe5 19.Nb6+–) 17...Ke7 (better 17...Bc8 18.Rf1 fe5 19.Nb6 e4–+) 18.Nc6= Nc6 (better 18...Bc6!? 19.Rf1 Be4=+) 19.Qb7+= Qh1 20.Bf1 Na5?? (better 20...Qe4 21.bc6 Qc6 22.Qc6 dc6 23.Nb6 Kd8+–) 21.Qh1+– Nb3 (21...d5 22.Bd4+–) 22.Bc3 Kf7 23.Nb6 Nc5 (23...d5 24.Nd5! Bd6 25.Qf3+–) 24.d4 Ne4 25.Qe4 d5 26.Nd5! ed5 27.Qd5 Kg6 28.Bd3 (28.Be2 f5 29.Qc6 Bd6 30.Qd6 Kf7 31.Bc4 Ke8 32.Qe6 Kd8 33.Ba5) 28...f5 29.Qf5 Kh6 30.e4 (30.d5 Bd6 31.Qg4 Bh2 32.Bg7) 30...g6 (30...Bd6 31.Bd2 Bf4 32.Bf4 g5 33.Qg5) 31.Bd2 Kg7 32.Qe5 Kg8 (32...Kf7 33.Bc4) 33.Bc4 1–0. DEFFM – malouda, freechess.org, 2019.

4.a4 ab5 5.ab5 Ra1 6.Ba1 d5 7.e3 Nd7 8.Nf3 Ngf6 9.Be2 Bd6 10.0-0 0-0 11.c4 Re8 12.d4 Ne4 13.Nbd2 Ndf6 14.Bb2 Bb7 15.Qc2 Nd2 16.Nd2 c6? (16...Qe7!?=) 17.c5 (17.bc6 Bc6 18.cd5 Bb7 (18...Bd5? 19.e4+-) 19.de6 Re6+/-) 17...bc5 18.dc5 Be7 (18...Bf8 19.Ra1+/-) 19.Ra1+- cb5 20.Bb5 Rf8 21.c6 Bc8 22.Ra7 White plans c7 (22.c7 Qd6+-) 22...Bd6 23.c7 Qe7 24.Nb3 (24.Nf3 Ne8+/-) 24...Ne4 (24...Ne8 25.Be8 Re8 26.Nd4+/-) 25.Bd3 f5 26.Bd4 Qh4 27.g3 Ng3?? (better 27...Qh6+/-) 28.hg3+- Bg3 (28...Qg5+-) 29.fg3 Qg3 30.Qg2 Qe1 (30...Qg2 31.Kg2 Kf7 32.Na5+-) 31.Bf1 f4 (31...g6 32.Qg5 e5+-) 32.Qg7 1-0. DEFFM – GuestKXGN, freechess.org, 2021.

4.e4 ab5 5.Bb5 Bc5?? (better is 5...Bb7=) 6.Bg7+– Bf2 (6...Qg5 7.Bh8 Qg2 8.Qf3 Bf2 9.Ke2+–) 7.Kf2 Qh4 8.g3 (better is 8.Kf1 Qg5 9.Bd7 Nd7 10.Bh8 Qg6+–) 8...Qe4 (8...Qg5 9.Bd7! Nd7 10.Bh8+–) 9.Qf3 (better is 9.Nf3+–) 9...Qc2 (9...Bb7 10.Bh8 Bd5 11.Qe4 Be4+–) 10.Qa8 Qd2 11.Nd2 (11.Nd2 Ne7 12.Bh8+–) 1–0. pierre – colly, internet, 2011.

4.a4 d5 5.e3 a6 6.Nf3 Ne7 7.Be2 ab5 8.ab5 Ra1 9.Ba1 c6 10.c4 cb5 11.cb5 Nd7 12.d4 Qc7 13.Nbd2 Nf5 14.0-0 Bb4 15.Qb3 Ba5 16.Bb2 0-0 17.Rc1 Qd6? 18.Ba3+– Qb8 19.Bb4?? Bb4+= 20.Qb4 Rc8 21.g4?? Nh6 22.Rc8+= Qc8 23.h3 Qc7 24.Kg2 f5? 25.Qe7+/– fg4?? 26.hg4 Nf8?? 27.Qc7 1–0. blackiwhite (1645) – delugens (1750), kurnik, 2011.

4.a4 Nf6 5.Nf3 d5 6.d4 Ne4 7.c4? Bb4–+ 8.Nbd2 g5?? 9.e3?? g4–+ 10.Ne5?! Nd2 11.Qg4 Nc4 12.Ke2 Nb2 13.Nf7 Kf7 14.Qh5 Ke7 15.Qg5 Kd7 16.Qg7 Be7 17.Kf3 Nc4 18.Bc4 dc4 19.e4 Rg8 20.Qe5 Qf8 21.Ke3 Rg2 22.Rhf1 Bg5 23.f4 Bf6 24.Qh5 Qb4 25.Qh7 Be7 26.Rad1 Qc3 (26...Qc3 27.Rd3 Qd3) 0–1. iczker – logika7, kurnik, 2011.

4.a4 g6?? 5.e3 f6 6.Nf3 Bg7 7.Nh4 Ne7 8.Nf3 d6 9.Be2 Nd7 10.0-0 Nc5 11.Nc3 e5 12.d4 Ne6 13.de5 de5 14.Qd8 Rd8 15.Rfd1 0-0 16.Rd8 Rd8 17.Rd1 Rd1 18.Nd1 Nc5 19.Nc3 Bf3 20.Bf3 Nf5 21.Ba3 Bf8 22.Bc5 Bc5 23.Nd5 Bd6 24.Nf6 Kg7 25.Ne4 Bb4 26.Ng5 Bd6 27.Ne4 h6?? 28.Kf1 g5 29.Bg4 Nh4 30.g3 Ng6 31.Bf5 Ne7 32.Be6 Ng8 33.Ke2 Nf6 34.Nf6 Kf6 35.Bb3 h5 36.Kf3 Bb4 37.Ke4 Be1 38.f3 Bf2 39.g4 hg4 40.fg4 Be1 41.h3 Bg3 42.Kf3 Be1 43.e4 Bb4 44.Bd5 Ke7 45.c4 Bd2 46.Kg3 Be1 47.Kg2 Kd6 48.Kf3 Kc5 49.h4 gh4? 50.g5+– Bd2 51.g6 Bh6 52.Kg4 h3 53.Kh3 Bg7 54.Kg4 Kb4? 55.Kf5 Ka4 56.Ke6 Kb4 57.Kf7 Bh6 58.g7 Bg7 59.Kg7 Kc3 60.Kf6 Kd4 61.Ke6 Ke3 62.Ke5 Kf3 63.Kf5 Kg3 64.e5 Kf2 65.e6 Ke3 66.e7 Kd3 67.Kf6 Kd4 68.Kf7 Kc5 69.e8Q Kb4 70.Qc6 a5 71.Qc7 (71.Qc7 Kb3 72.c5 Kc2 73.cb6 Kb2 74.b7 Kb1 75.Qc3 a4 76.Be4 Ka2 77.b8Q a3 78.Qh2) 1–0. j1a9n55 – zacier, kurnik, 2011.

4.e3 (--> 1.b4 b6 2.Bb2 Bb7 3.e3 e6 4.b5).

4.e3 f5 5.Nf3 Nf6 6.Be2 Be7 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 b6 6.Be2 Bb7).

4.Nf3 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.b5).

4.Nf3 Nf6 5.e3 (--> 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3).

4.a4 c6 5.Nc3 a6 6.Nf3 Qf5 7.e4 Qf6 8.a5 ab5 9.Na4 ba4 (better is 9...Qd8 10.Nb6 Ra7+/–) 10.Bf6 a3 (10...Nf6 11.e5 Ne4+–) 11.Bc3 b5 12.Ng5 h6 (12...Nh6 13.Rb1+–) 13.Qh5 g6 14.Qf3 (14.Bh8?! gh5 15.Nh7 Bc5+=) 14...b4 (14...hg5 15.Bh8 Na6+–) 15.Qf7 Kd8 16.Qf8 Kc7 17.Be5 d6 (17...Kb7 18.Qb4 Ka7 19.Qb6) 18.Qd6 Kb7 19.Qc7 1–0. pierred – kevin_alden, Yahoo, 2005.

4.e3 d5 5.Nf3 Qe7 6.Bd3 c6 7.a4 cb5 (7...a6 8.0-0+=) 8.ab5+/- Qd7 9.Ne5 (better 9.Ng5 f5 10.0-0+/-) 9...Qd6?? (better 9...Qc7+=) 10.Nf7!+- Kf7 11.Qh5 Ke7 (11...g6 12.Qf3 Ke8 13.Bh8+-) 12.Ba3 Qa3 13.Na3 g6 (13...Nf6 14.Qe5+-) 14.Qe5 Bd7 (14...Nf6 15.Qc7 Nbd7+-) 15.Qh8 (15.Qh8 Nf6 16.e4+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

(--> 1.b4 b6 2.Bb2 Bb7 3.c4 e6).

4.e3 (--> 1.b4 b6 2.Bb2 Bb7 3.e3 e6 4.c4).

4.e3 f5 5.Nf3 Nf6 6.b5 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 b6 5.e3 Bb7 6.Nf3).

4.e3 Nf6 5.b5 Be7 6.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4).

4.Nf3 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.c4).

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.c4).

4.Qa4 A) 4...a6 5.Nc3 (5.a3 Nc6 6.Nf3 Bd6 7.Nc3 Bb7 8.d4 a5 9.b5) 5...Bb7 6.Nf3 Nc6 7.a3 Bd6 8.d4 a5 9.b5; B) 4...Na6 5.a3 (5.Nf3 Bb4 6.Nc3 0-0 7.Ne5 Bb7 8.f3 Ba5 9.Nd3) 5...c5 6.b5 Nc7 7.Nf3 Bb7 8.Nc3 Bd6 9.e3; C) 4...Bb7 5.Nf3 (5.Nc3 a6 6.Nf3 Nc6 7.a3 Bd6 8.d4 a5 9.b5) 5...Bd6 6.d4 0-0 7.Nbd2 Nc6 8.c5 Be7 9.b5.

4.Qb3 A) 4...d5 5.Nf3 (5.Nc3 a5 6.ba5 dc4 7.Qb5 Bd7 8.Qc4 Ra5 9.Nf3) 5...Nc6 6.Qa4 Bd7 7.b5 Na5 8.cd5 ed5 9.Ne5; B) 4...a6 5.b5 (5.Nf3 Nc6 6.a3 Bd6 7.Nc3 Qe7 8.e3 0-0 9.Bd3) 5...d5 6.Nf3 Nbd7 7.cd5 Nd5 8.Na3 Nc5 9.Qc2; C) 4...Nc6 5.b5 (5.a3 Be7 6.Nf3 Bb7 7.Nc3 0-0 8.e3 a5 9.b5) 5...Na5 6.Qd3 Bb7 7.Nf3 Bc5 8.Nc3 0-0 9.e3.

4.b5 a6 5.Nc3 (5.Nf3 ab5 6.cb5 Bb7 7.Nc3 d5 8.h3 Bd6 9.e3) 5...Bb7 6.Nf3 ab5 7.cb5 d5 8.g3 d4 9.Na4.

4.b5 Bb7 5.Nc3 a6 6.e3 ab5 7.cb5 c5 8.Nf3 d5 9.Bd3.

4.b5 Bb7 5.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.c4).

4.b5 Be7 5.Nc3 (5.Nf3 d6 6.g3 Nbd7 7.Bg2 Bb7 8.0-0 0-0 9.Nc3) 5...d6 6.Nf3 Nbd7 7.e3 0-0 8.Be2 Bb7 9.0-0.

4.b5 a4 5.c4 Bd6?? (better is 5...a3 6.Bc3 Nf6=) 6.Bg7+– f6 (6...Be5 7.Be5 f6 8.Qh5 Ke7 9.Qg4+–) 7.Bh8 Qe7 8.Qh5 (8.Nc3 Bb7+–) 8...Qf7 9.Be2 Qh5 (9...Bb7 10.Qf7 Kf7 11.Bh5 Ke7 12.Bf3 Bf3 13.Nf3+–) 10.Bh5 Kf8 11.Nf3 (11.Bf3 Ra7+–) 11...Be7 12.0-0 (better is 12.e4 Bb7 13.d3 Nh6+–) 12...Nh6 13.Nc3 (13.g4!? Nf7 14.Bf7 Kf7+–) 13...Kg8 14.Bf6! Bf6 15.g4 (15.d4 Nf5+–) 15...Bb7 16.g5 Bc3 17.dc3 (17.gh6?! Ba1 18.Ra1 Ra5+–) 17...Nf5 18.Ne5 White intends g6 18...Nd6 (18...Nh4 19.c5! bc5 20.Rad1+–) 19.f4 a3 (19...Ne4 20.Bf3+–) 20.g6 (20.Rad1 Kf8+–) 20...hg6 21.Ng6 (better is 21.Bg6!? Ne4+–) 21...Nc4 22.f5 ef5 23.Rf5 Be4 (23...Kh7 24.Ne7 Nd6 25.Rg5+–) 24.Ne7 Kg7 25.Rf4 Bd3 (25...Nd6+–) 26.Kf2 Ra5 (26...Nc6 27.Rg1 Kh8 28.bc6 Bh7 29.Ng6 Bg6 30.Bg6 Rg8 31.cd7 Nd6 32.Bd3 Ne4 33.Be4 Rg1 34.d8Q Rg8 35.Qd4 Rg7 36.Rf8) 27.Rg1 Kh6 (27...Kh7 28.Bg6 Kh6 29.Ng8 Kg7 30.Bd3 Kh8 31.Rh4) 28.Bf3 Rb5 (28...Bg6 29.Rg6 Kh7 30.Rh4) 29.Rh4 Rh5 30.Rh5 1–0. GuestQWHV – GuestJMLH, freechess.org, 2017.

4.b5 Bb7 5.Nf3=.

4.b5 c6 5.c4 (5.Nc3 Nf6=) 5...cb5 (5...Nf6 6.Nc3=) 6.cb5 (6.Qf3 Ra7 7.Qg3 d6 8.Bg7 Bg7 9.Qg7 Qf6 10.Qf6 Nf6 11.cb5 Rc7+=) 6...Nf6 (6...d5 7.Nf3=) 7.Nc3 (7.Nf3 d5=) 7...Be7 (7...d5 8.Nf3=) 8.Nf3 0-0 9.Na4 (9.Be2=) 9...Nd5 (9...d6!?=) 10.e4+= d6?? (better is 10...Nf6 11.Bd4 Bc5 12.Nc5 bc5 13.Bc5 d6 14.Bd6 Qd6+/–) 11.ed5+– ed5 (11...e5 12.d4+–) 12.Bd3 Qe8 (12...Bg4 13.h3 Be6 14.Nd4+–) 13.0-0 Nd7 14.Qc2 Ne5 (14...h6+–) 15.Ne5 de5 16.Nb6 (16.Be5 Ra7+–) 16...Rb8 17.Nd5 Bd7 (17...Bd6 18.f4 Rb5 19.Bb5 Qb5 20.fe5 Qd5 21.ed6+–) 18.Be5 Rd8 (18...Rb7 19.Nc7 Qb8 20.Bh7 Kh8 21.Rfe1+–) 19.Bh7 Kh8 20.Nc7 Bf5 (20...Rc8 21.Bg7! Kg7 22.Ne8 Rfe8+–) 21.Qf5 Qd7 22.Qh5 Qd2 (22...Qh3 23.gh3 Rfe8 24.Be4 Kg8 25.Qh7 Kf8 26.Qg7) 23.Be4 Kg8 (23...Qh6 24.Qh6 Kg8 25.Qg7) 24.Qh7 1–0. Intruder – inator2, internet free game, 2018.

4.Bg7 Bb7 5.Nf3 d6 6.Bh8 Nd7 7.a3 Ba5 8.Bc3 Bc3 9.Nc3 Qf6 10.Be2 0-0-0 11.a4 Nc5 12.a5 Ne7 13.ab6 cb6 14.Ra7 Nc6 15.Ra3 Qe7 16.Qa1 Kc7 17.0-0 Nb4 18.Qb2 Nd5 19.Nd5 ed5 20.Rb1 Nd7 21.Rc3 Bc6 22.Nd4 Rb8 1–0. nordlicht – vahann_1, gameknot.com, 2001.

4.Bg7 Nf6 5.Bh8 Ke7 6.Bf6 Kf6 7.Nc3 d5 8.Nf3 Bb7 9.Nd4 c5 10.Qf3 Ke7 11.Nde2 Qd7 12.Qh5 d4 13.ed4 cd4 14.Nd1 d3 15.cd3 Qd3 16.Qg5 Kd7 17.Nec3 Qc2 18.Qb5 Nc6 19.Bd3 a6 20.Qc6! Bc6 21.Bc2 Bg2 22.Rg1 Rg8 23.Ne3 Bc3 24.dc3 Be4 25.Rg8 (25.Rg8 f5 26.Be4 fe4 27.Rd1 Ke7 28.Ra8+–) 1–0. Fournier,Frederic – digerin, kurnik.com, 2009.

(--> 1.b4 b6 2.Bb2 Bb7 3.e3 e6).

4.c4 Nf6 5.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.c4).

4.Nf3 a5 5.b5 (--> 1.b4 a5 2.b5 b6 3.e3 Bb7 4.Bb2 e6 5.Nf3).

4.Nf3 d5 5.c4 Nf6 6.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.c4).

4.Nf3 f5 5.c4 Nf6 6.b5 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 b6 5.e3 Bb7 6.Nf3).

4.Nf3 f5 5.Be2 Nf6 6.b5 Be7 7.c4 0-0 (---> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 b6 5.e3 Bb7 6.Nf3 Be7 7.Be2 0-0).

4.Nf3 Nf6 5.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3).

4.Nf3 Nf6 5.a3 Be7 6.c4 0-0 7.Be2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 0-0 7.c4).

4.Nf3 Nf6 5.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3).

4.Nf3 Nf6 5.b5 c5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5).

4.Nf3 Nf6 5.b5 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7).

4.Nf3 Nf6 5.b5 Be7 6.Be2 0-0 7.c4 c5 8.0-0 d5 9.a4 (---> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4).

4.bc5 bc5 5.Nf3 Nf6 6.Na3 Ba6 (6...Be7 7.Rb1=) 7.Ba6 Na6 8.0-0 Be7 9.e4 d5 (9...Ne4? 10.Qe2+– (10.Bg7?! Rg8 11.Be5 d5=)) 10.ed5 Qd5 11.c4 Qb7 12.Qa4 Nd7 13.Qb5 Qb5 14.cb5 Nb4 15.Bg7 Rg8 16.Bb2 a6 (16...Nd3 17.Bc3=) 17.Bc3 (17.Rfb1 Nd3 18.Bc3 ab5 19.Nb5 Ra4+=) 17...Nd5 (17...ab5 18.Nb5 Ra2 19.Ra2 Na2 20.Ra1 Nc3 21.dc3+=) 18.g3 (18.Rfb1 Rg4 19.ba6 Ra6+=) 18...h5 (18...Rg4!? 19.ba6 Ra6+=) 19.Rfb1+= h4 20.Kg2 ab5 21.Nb5 Ra4 22.a3 f5 23.Rg1 f4 (23...c4 24.Rge1+=) 24.Rae1 fg3 25.fg3 Rag4 (25...c4!?+=) 26.Kf2+– (26.Re6? Nf4 27.Kh1 Ne6–+) 26...hg3 27.Rg3 Kf7 28.Re2 Nf4 29.Re3 (29.Rg4 Rg4 30.Re4 Kg6+/–) 29...c4 30.Rg4 Rg4 31.Re4 Nd3 32.Ke3 Bc5 33.Bd4 Re4 34.Ke4 Nf6 35.Ke3 Ng4 36.Ke2 Nf4 37.Kf1 Bd4 38.Nbd4 e5 39.Ne2 Ke6 (39...Nd3 40.h3 Nf6 41.Nc3+/–) 40.Nf4 ef4 41.h4 Kd5 42.h5 Kc5 43.Ke2 Kb5 (43...Kd5 44.a4+–) 44.Nd4 Ka4 45.Kf3 Nf6 (45...Nh6+–) 46.h6 Ka3 47.Kf4 (47.Kf4 Nh7 48.Kf5+–) 1–0. marekt – suopis, internet, 2014.

4.bc5 Bc5 5.Bg7 Be7 6.Bh8 Bf6 7.Bf6 Qf6 8.d4 Bb7 9.Nf3 Nc6 10.Bb5 Nce7 11.0-0 a6 12.Ba4 b5 13.Bb3 Nh6 14.Nbd2 0-0-0 15.c4 Rg8 16.cb5 ab5 17.Rc1 Bc6 18.Ne4 Qg7 19.Ng3 Nhf5 20.Rc6 Nc6 21.Qc2 Ng3 22.fg3 h5 23.Ne5 f5 24.Nc6 dc6 25.Qc6 Kd8 26.Qe6 Re8 27.Qd5 Kc7 28.Qb5 Re3 29.Rc1 Kd8 30.Qb6 Ke8 31.Rc8 Ke7 32.Rc7 Kf8 33.Rg7 Kg7 34.d5 Re1 35.Kf2 1–0. Phomopsis – PapaWasiy55, lichess.org, 2018.

4.a3 A) 4...Nf6 A1) 5.Be2 a6 6.Nf3 Bb7 7.Nc3 Bd6 8.0-0 0-0 9.Ra2 b5 10.d3 Re8=; A2) 5.Bd3 Be7 (5...a6 6.Nf3 Be7 7.c4 Bb7 8.0-0 0-0 9.Qc2 h6 10.e4 d6=; 5...Bd6 6.Nf3 a6 7.e4 e5 8.0-0 0-0 9.Nc3 Be7 10.Nd5 d6=; 5...Bb7 6.Nf3 a6 7.0-0 Be7 8.e4 0-0 9.Qe2 d6 10.Nc3 Qd7=) 6.b5 Na5 7.Qe2 d5 8.Nf3 c5 9.bc6 Nc6 10.0-0 0-0=; A3) 5.Nh3 Bb7 (5...a6 6.Be2 Bb7 7.0-0 Be7 8.Nf4 0-0 9.c4 d5 10.cd5 Nd5=; 5...d5 6.Bb5 Bd7 7.Ba6 Bd6 8.f4 Qe7 9.b5 Na5 10.Bc3 Nc4=; 5...Be7 6.Be2 a6 7.0-0 0-0 8.Nc3 Bb7 9.Ng5 b5 10.f4 h6=) 6.f3 Be7 7.Be2 0-0 8.0-0 a6 9.Nf4 d5 10.d4 Bd6=; A4) 5.Nf3 a6 (5...Bb7 6.d4 a6 7.Bd3 Be7 8.0-0 0-0 9.c4 Re8 10.e4 d5+=) 6.Nc3 Bb7 7.e4 Bd6 8.d4 Ng4 9.h3 Nh6 10.Bc1 Qf6+=; B) 4...a5 5.b5 Na7 (5...Nce7 6.Nf3 Bb7 7.Be2 Nf6 8.0-0 Ng6 9.Ne5 Bd6 10.f4 0-0=; 5...Nb8 6.Nf3 Nf6 7.Bd3 Be7 8.0-0 Bb7 9.Nc3 0-0 10.Re1 d5=) 6.Nf3 Nf6 7.Be2 Bb7 8.Nc3 Be7 9.0-0 0-0 10.Ne5 c6=; C) 4...a6 C1) 5.Bd3 d5 (5...Bb7 6.Nf3 Nf6 7.0-0 Be7 8.Nc3 0-0 9.e4 d6 10.Qe2 b5=; 5...Nf6 6.Nf3 Bb7 7.0-0 Be7 8.e4 0-0 9.Nc3 d6 10.Qe2 Qd7=; 5...e5 6.Nf3 d6 7.Nc3 Nf6 8.0-0 Be7 9.Ng5 d5 10.Be2 e4+=) 6.Nf3 Nf6 7.Qe2 Bd6 8.0-0 0-0 9.Re1 Re8 10.e4 de4+=; C2) 5.Be2 Nf6 (5...Bb7 6.Nf3 Nf6 7.Nc3 Bd6 8.0-0 0-0 9.d3 Qe7 10.Qd2 e5=) 6.Nf3 Bb7 7.0-0 Bd6 8.Nc3 0-0 9.Re1 e5 10.e4 Nd4=; C3) 5.Nc3 Bb7 (5...Be7 6.Nf3 Nf6 7.Be2 e5 8.0-0 0-0 9.d4 e4 10.Ne5 Qe8=; 5...Nf6 6.Nf3 Be7 7.Be2 e5 8.0-0 0-0 9.d4 e4 10.Ne5 Qe8=; 5...e5 6.Nf3 Nf6 7.e4 d6 8.Be2 Be7 9.d4 ed4 10.Nd4 Bd7+=) 6.Nf3 Nf6 7.Be2 Bd6 8.0-0 0-0 9.Re1 Qe7 10.e4 Bf4=; C4) 5.Nf3 Nf6 (5...Bb7 6.Nc3 Nf6 7.Be2 Be7 8.0-0 0-0 9.e4 b5 10.d4 d5+=) 6.Be2 Bd6 7.Nc3 Bb7 8.0-0 0-0 9.Re1 Ne5 10.Ne5 Be5=; D) 4...Bb7 D1) 5.Be2 Nb4 (5...Nf6 6.Nf3 a6 7.0-0 Bd6 8.Nc3 0-0 9.Re1 Ne5 10.Ne5 Be5=; 5...a6 6.Nf3 Nf6 7.Nc3 Bd6 8.0-0 0-0 9.Re1 Ne5 10.e4 c5=) 6.ab4 Bg2 7.Bf3 Bh1 8.Bh1 c6 9.Bd4 d5 10.Nf3 Nf6+=; D2) 5.b5 Na5 (5...Nce7 6.Nf3 a6 7.ba6 Ba6 8.Ba6 Ra6 9.0-0 d5 10.Qe2 Qa8=; 5...Nb8 6.Nc3 Nf6 7.Nf3 a6 8.a4 Bb4 9.Be2 0-0 10.0-0 d6=) 6.Nf3 Nf6 7.Nc3 Be7 8.Bd3 a6 9.ba6 Ba6 10.Ba6 Ra6=; D3) 5.Nf3 a6 (5...Nf6 6.Be2 a6 7.0-0 Bd6 8.Nc3 0-0 9.d3 Be7 10.e4 d5=) 6.Bc4 Nf6 7.0-0 Be7 8.Nc3 0-0 9.d4 d5 10.Bd3 Bd6=.

4.b5 Na5 5.Nc3 a6 (5...Bb7 6.Nf3 Nf6 7.a3 Be7 8.Be2 0-0 9.0-0 a6 10.ba6 Ba6=; 5...Nf6 6.Nf3 a6 7.Be2 d5 8.Ne5 Bd6 9.f4 Nd7 10.Nd7 Qd7=; 5...d5 6.Nf3 a6 7.e4 ab5 8.Bb5 c6 9.Bd3 Ba6 10.Ba6 Ra6+=) 6.Nf3 Nf6 7.Be2 ab5 8.Nb5 Be7 9.Nbd4 Bb7 10.0-0 0-0=.

4.b5 Na5 5.c4 Bb7 6.Nf3 Nf6 7.Be2 Bf3 (7...a6 8.0-0=) 8.Bf3+= Nc4 9.Bf6 (better 9.Ba8!? Qa8 10.0-0+=) 9...Qf6=+ 10.Ba8 Qa1 11.Qc2?? (11.Qb3=+) 11...Bb4 (better 11...Na3 12.Qd1 Qb1 (12...Nb1?! 13.0-0–+) 13.Qb1 Nb1–+) 12.0-0= d5 13.d3 Qb2 14.Bc6 (14.Rc1 Qc2 15.Rc2 Ke7 16.Bd5 ed5 17.dc4 Rd8=) 14...Ke7 15.Qa4 Nd2 (15...Ne5 16.Qa7 Bd6–/+ (worse 16...Nd3 17.Qc7 Kf6 18.Qb6+=)) 16.Nd2+– Qd2 17.Qa7 (17.Rd1 Qc3+–) 17...Bd6+= 18.d4 h5 19.a4 (19.Qa4 Qe2 20.Rc1 h4+=) 19...h4 20.h3 Qc2 (20...f5 21.Qa6=) 21.a5+= ba5 22.Qa5 Qf5 (22...g5 23.Re1=) 23.Qa7+– e5 (23...Kf6!?+–) 24.b6 ed4 25.bc7 Do you see the mate threat? (25.ed4 Qf4 26.Re1 Kf6=) 25...Qe5?? (25...Kf6 26.Qd4 Qe5 27.Bd5 Qd4 28.ed4 Bc7 29.Rc1+–) 26.c8Q (better 26.c8N Kf6 27.Nd6 Qd6 28.Qd4 Qe5 29.Qb6+– (worse 29.Bd5 Qd4 30.ed4 Rd8+–)) 26...Kf6+= The mate threat is Qh2 27.f4 (better 27.Qf5! Qf5 28.Qd4 Qe5 29.Bd5 Qd4 30.ed4+=) 27...Qe3=+ (27...Rc8 28.fe5 Kg5 29.Qf7 Kh6 30.Rf5 g6 31.Rf6 Rg8 32.Qg8 de3 33.Qg6) 28.Kh1 Threatening mate: Qf5 28...Rc8 29.Bd5 Rc2?? (better 29...Rc7 30.Qb6 Ke7=+) 30.Qf7 1–0. aravind555 (1610) – RLIV, lichess.org, 2020.

4.b5 Na5 5.Bd4 Nf6 (5...a6 6.Nf3 Nf6 7.Nc3 ab5 8.Bb5 Bb7 9.0-0 Be7 10.e4 0-0=; 5...Ne7 6.Nf3 a6 7.Ng5 Bb7 8.Qh5 Ng6 9.ba6 Ba6 10.Ba6 Ra6=; 5...Bb7 6.Nf3 Nf6 7.Be2 a6 8.ba6 Ba6 9.Ba6 Ra6 10.Qe2 Ra8=) 6.Nf3 a6 7.Nc3 Be7 8.e4 0-0 9.e5 Nd5 10.Nd5 ed5=.

4.b5 Na5 5.Be5 Nf6 (5...a6 6.Nf3 d5 7.Nc3 f6 8.Bg3 Bb4 9.Na4 ab5 10.Bb5 c6=) 6.Nc3 Bb7 7.Nf3 d6 8.Bf6 Qf6 9.Be2 Be7 10.0-0 0-0+=.

4.b5 Na5 5.Nf3 Nf6 (5...a6 6.a4 Bb7 7.ba6 Ba6 8.Ba6 Ra6 9.Qe2 Ra8 10.0-0 Nf6=; 5...Bb7 6.Be2 Nf6 7.0-0 a6 8.ba6 Ba6 9.Ba6 Ra6 10.Qe2 Ra8=; 5...Ne7 6.Nc3 Bb7 7.Rb1 a6 8.ba6 Ba6 9.Ba6 Ra6 10.Qe2 Ra8+=) 6.Bd4 a6 7.Nc3 ab5 8.Bb5 Bb7 9.0-0 Be7 10.e4 0-0=.

4.b5 Nb4 A) 5.c3 Nd5 6.e4 Nde7 7.d4 a6 8.Nd2 ab5 9.Bb5 Ba6 10.Ba6 Ra6=; B) 5.a3 Nd5 6.Qf3 c6 7.c4 Nde7 8.Bd3 a6 9.Ne2 ab5 10.cb5 Bb7+=; C) 5.Ne2 Bb7 (5...a6 6.a3 Nd5 7.e4 Nde7 8.Ng3 d5 9.ed5 Nd5 10.c4 Ndf6=; 5...Nd5 6.e4 Nde7 7.Ng3 a6 8.a4 Bb7 9.ba6 Ba6 10.Ba6 Ra6+=) 6.a3 Nd5 7.e4 Nde7 8.Ng3 d5 9.Qf3 Ng6 10.Nc3 d4=; D) 5.e4 Qh4 6.d3 d5 7.a3 de4 8.g3 Qd8 9.ab4 Bb4 10.Nd2 Nf6+–.

4.b5 Nb8 A) 5.Nf3 Nf6 (5...Bb7 6.Bc4 a6 7.Nc3 ab5 8.Nb5 Ra4 9.d3 d5 10.Bb3 Ra5=; 5...a6 6.a4 Bb7 7.Be2 Nf6 8.0-0 Be7 9.Nc3 0-0 10.ba6 Ba6=; 5...d5 6.Be2 a6 7.a4 Nf6 8.0-0 Bd6 9.Ne5 0-0 10.f4 Bb7=) 6.Be2 a6 7.Nc3 ab5 8.Nb5 c6 9.Nc3 d5 10.Ne5 Bd6=; B) 5.Qf3 d5 (5...c6 6.Nc3 Nf6 7.e4 d5 8.bc6 Nc6 9.Bb5 Bb7 10.ed5 Nd5=) 6.Qg3 Nf6 7.Nf3 Ne4 8.Qf4 f6 9.Qh4 h5 10.Be2 g5–/+; C) 5.Nc3 a6 (5...Bb7 6.Nf3 a6 7.Bc4 ab5 8.Nb5 Ra4 9.Bb3 Ra5 10.c4 Nc6=; 5...Nf6 6.Nf3 a6 7.a4 Bb4 8.Be2 0-0 9.0-0 Bb7 10.Ne5 d5=; 5...d5 6.Nf3 a6 7.a4 Nf6 8.Bd3 c5 9.ba6 Ba6 10.Nb5 Nbd7=) 6.Nf3 Nf6 7.Be2 ab5 8.Nb5 c6 9.Nc3 d5 10.0-0 Bd6+=; D) 5.a4 Nf6 (5...a6 6.Nf3 Nf6 7.Be2 Bb7 8.0-0 Bb4 9.Bc3 Bc3 10.Nc3 0-0=; 5...Bb7 6.Nf3 Nf6 7.Be2 Bb4 8.0-0 0-0 9.Nd4 a6 10.Nc3 e5=; 5...d5 6.Nf3 Nf6 7.Be2 a6 8.0-0 Bd6 9.Ne5 0-0 10.f4 Bb7=) 6.Qf3 d5 7.Be2 a6 8.Nh3 Bd6 9.0-0 c6 10.bc6 Nc6=.

4.b5 Nce7 5.Be2 (5.Nf3 a6 (5...Bb7 6.Be2 a6 7.ba6 Ba6 8.0-0 Be2 9.Qe2 d5 10.d3 Ng6+=) 6.Ne5 Nf6 7.Nc3 c6 8.Qf3 ab5 9.Ne4 Nf5 10.Ng5 Nd6=; 5.a4 a6 6.Nf3 Nf6 7.a5 ba5 8.Ra5 c6 9.Ra2 Ned5 10.ba6 Nb4+=; 5.Nc3 Nf6 (5...Bb7 6.Nf3 Nf6 7.Be2 a6 8.0-0 ab5 9.Nb5 Ng6 10.Bf6 gf6=; 5...a6 6.Nf3 Nf6 7.Be2 ab5 8.Nb5 Bb7 9.0-0 Ng6 10.Bf6 gf6=; 5...d5 6.Nf3 a6 7.a4 Nf6 8.Bd3 ab5 9.ab5 Ra1 10.Qa1 Ng6+=) 6.Nf3 a6 7.a4 Bb7 8.Be2 Ng6 9.0-0 Bb4 10.Re1 0-0=; 5.Qf3 c6 (5...d5 6.a4 a6 7.Bd3 f6 8.e4 Bb7 9.e5 f5 10.Ne2 Ng6=) 6.Ne2 Bb7 7.Nf4 Qc7 8.Na3 e5 9.Ne2 d5 10.c4 Nf6+=) 5...Bb7 (5...a6 6.a4 Nf6 7.Nf3 Bb7 8.0-0 Nf5 9.ba6 Ba6 10.Ba6 Ra6+=; 5...d5 6.Nf3 a6 7.a4 Nf6 8.0-0 Ng6 9.a5 ba5 10.Ra5 c5+=; 5...Nf6 6.Nf3 a6 7.a4 Nf5 8.0-0 Bb7 9.ba6 Ba6 10.Ba6 Ra6+=) 6.Bf3 (6.Nf3 a6 7.ba6 Ba6 8.Ba6 Ra6 9.0-0 d5 10.Re1 Nf5=) 6...Qc8 (6...d5 7.Ne2 a6 8.c4 Qc8 9.cd5 Nd5 10.ba6 Ra6=) 7.Bb7 (7.d3 a6 8.c4 ab5 9.cb5 Nd5 10.Ne2 Ra5=) 7...Qb7 8.Nf3 Nf6 (8...a6 9.a4 Nf6 10.0-0 d5+=) 9.d3 (9.c4 a6 10.d3 d5+=) 9...0-0-0 (9...a6 10.c4 d5+=) 10.a4 (10.0-0 Nf5+=) 10...Kb8 (10...Ng6+=) 11.c4 d5 12.Nbd2 Nc8? (12...dc4 13.Nc4 Nd7 14.0-0+–) 13.Bc3 (13.Ne5!? Re8 14.a5 ba5 15.Ra5 dc4 16.Nc6 Ka8 17.Nc4 Nd5+–) 13...Nd7 14.a5 Nc5 (14...dc4 15.Nc4 Qd5 16.Qb1+/–) 15.0-0 (better is 15.Ne5 Nd3 16.Nd3 dc4 17.Ne5 (17.Nc4?! Qg2 18.Rf1 f6+–) 17...Qg2 18.Rf1+–) 15...Nd3+/– 16.Qb1 dc4 17.Nc4 Bc5? (better is 17...c6 18.ab6 cb5+–) 18.Nce5+– (18.Bg7 Rhg8 19.Nce5 Ne5 20.Ne5 Ne7 21.Qh7 f6+/–) 18...Ne5 19.Ne5 (19.Be5?! f6+=) 19...Rd5 (19...Nd6 20.Nc6 Kc8 21.Bg7 Rhe8 22.ab6 Bb6 23.Nd8 Rd8 24.Qh7 Qd5+–) 20.Nc6 Ka8 21.a6 (21.a6 Qc6 22.bc6+–) 1–0. Vila Vila,Ricard (1860) – Baeza Fernandez,Jose Alfonso (1795), Vic ESP, 2011.

4.Qh5 Ke7 5.Qf3 c6 6.b5 Bb7 7.Qg3 Nf6 8.Nf3 d6 9.Bd3 Nbd7 10.bc6 Bc6 11.Nd4 Qc7 12.0-0 Nc5 13.f3 Kf7 14.Nc3 Nd3 15.cd3 Be7 (15...Rc8 16.Rac1 Qd7 17.Nc6 Rc6 18.Ne2=) 16.Rac1 (better is 16.Qg7! Kg7 17.Ne6 Kf7 18.Nc7+–) 16...Qd7+= 17.e4 g6? (better is 17...Nh5 18.Qf2 Rhc8=) 18.Nc6+– Qc6 19.Nd5 Qb5 20.Bf6 ed5 21.Be7 Ke7 (21...Rhe8 22.Bg5 Qd7+–) 22.Rc7 (22.Rc7 Qd7 23.Qg5 Ke8 24.Rd7 Kd7 25.ef5+–) 1–0. Krueger,Ingo (1765) – Olschok,Juergen (1720), Pinneberg–ch, 2005.

4.Qh5 g6?? 5.Qf3+– (5.Qf3 Nc6 6.Bh8 Bb4 7.Qh3+–) 1–0. DEFFM – IagoPrytherch, freechess.org, 2018.

4.a3 Bb7 5.c4 d5 6.Nf3 dc4 7.Bc4 e5? (better is 7...Qd7+/–) 8.Ne5!+– fe5 9.Qh5 g6 10.Qe5 Qe7 11.Qe7 (11.Qh8 Nh6+–) 11...Be7 12.Bh8 Bg2 (12...Nh6 13.f3 Nf7+–) 13.Rg1 (13.Bg8?! Bh1 14.d4 Nd7+/–) 13...Be4 14.Bg8 Nd7 15.Ke2 (better is 15.Nc3 Bd3 16.Bg7 c6+–) 15...Nf6 (15...0-0-0 16.Bh7 Rh8+–) 16.Bf6 Bf6 17.Ra2 Ke7 18.Bh7 Rh8 19.Bg6 Bd5 20.Rc2 c6 21.b5 c5 22.d4 Bb3 23.Rc3 c4 24.d5 Rh2 25.e4 Bc3 26.Nc3 Bc2 27.e5 Rh4 28.Bc2 Rh5 29.e6 Kd6 30.Rg7 Re5 31.Be4 Kc5 32.Rc7 Kd6 33.Rd7 Kc5 34.Kd2 Kd4 35.Bf3 Rf5 36.e7 Rf3 37.e8Q Rf2 38.Ke1 Kc3 39.Qe3 Kb2 40.Qf2 Ka3 41.Rc7 Kb4 42.Qb2 Ka5 43.Rc4 a6 44.Qa3 Kb5 45.Qb4 1–0. slavisa99 – grigoropoulo2, caissa.com, 2004.

4.a3 d5 5.Be2 c5 6.bc5 Bc5 7.Bh5 g6 8.Bf3 Nc6 9.c4 dc4?? 10.Bc6+– Ke7 11.Ba8 (11.Ba8 e5 12.Qa4+–) 1–0. revbodio – GRIGOROPOULOS18, Caissa.com, 2004.

4.c4 Bb4+= 5.Bd3 c5 (5...Bb7 6.Qh5 Kf8 7.Nf3+=) 6.Qh5= Kf8 7.a3 (7.Be4 Nc6=) 7...Ba5 (7...Bb7 8.Nf3 (worse is 8.ab4 Bg2 9.bc5 Bh1–+) 8...Ba5 9.Nc3=) 8.Ne2 (8.Be4 Nc6=) 8...Nc6 9.0-0 Qe7 (9...Nge7 10.Nbc3=) 10.Nf4 (10.Bh7? g5–+) 10...Nh6 (better is 10...Qd6!?=) 11.Bh7!+/– Rh7?? (better is 11...Qf7 12.Ng6 Ke8 13.Nh8 Qh5 14.Bg6 Qg6 15.Ng6 e5+/–) 12.Ng6+– Kg8 (12...Ke8 13.Ne7 Ke7+–) 13.Ne7 Ne7 (13...Kf8 14.Qg6 Rh8 15.Bf6 gf6 16.Qf6 Nf7 17.Ng6 Kg8 18.Nh8 Nh8+–) 14.Qe8 1–0. DEFFM – GuestYPZZ, freechess.org, 2018.

4.Qf3 d5 5.d4 (5.a3 a5 6.b5 e5=) 5...Bb7 (5...Bb4 6.Bc3 Bd6 7.Nd2–/+) 6.Ne2 a6 (6...Bb4 7.Bc3 Bd6 8.Nd2=+) 7.Qg3 b5 8.a3 Nh6 9.Nf4 Qd7 10.Nd2 Nf5 11.Qh3 Bd6 12.g3 (12.Ng6! Rg8 13.Qh7+/–) 12...Qf7 13.Nb3 Nd7 14.Nc5 Nc5 15.dc5 Bf4 16.gf4 c6 17.Bd3 Nh6 18.Rg1 Kf8 19.Qg3 g6 20.h4 Nf5 21.Qh3 Ne7 22.0-0-0 Rg8 23.h5 f5 24.h6 Ke8 25.Qh4 Kd7 26.Bg7 Rge8 27.Qg3 Ng8 28.Qf3 Nf6 29.Qe2 Nh5 30.Bb2 Nf6 31.Qd2 Rf8 32.Qc3 Ne4 33.Be4 fe4 34.Qe5 Qe7 35.Rg5 Rf5 36.Rf5 ef5 37.Qc3 Re8 38.Qb3 Bc8 39.Bg7 Qe6 40.a4 Kd8 41.ab5 ab5 42.Kb2 Qd7 43.Ra1 Ke7 44.Be5 Ke6 45.Qc3 Rf8? 46.Bd6 Rf7?? 47.Qe5 1–0. slavisa99 – grigoropoulo3, caissa.com, 2004.

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3).

4.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3).

4.Qf3 d5 5.Bf6 Qf6 6.Qf6 gf6 7.a3 f5 (7...Bd6 8.Nc3=+) 8.d4 (8.Nc3 c6=) 8...f6 (8...c5 9.bc5 bc5 10.Nc3=+) 9.c3 (9.c4 c6=) 9...e5 (9...Rg8 10.Nd2=+) 10.Nd2 (10.c4 dc4 11.Bc4 Bb7=) 10...Bb7 (10...Be6 11.c4=) 11.Ne2 Bh6 (11...a5 12.b5=) 12.c4 dc4 13.Nc4 ed4 (13...f4 14.Rd1+=) 14.ed4 (better is 14.Nd4!? f4 15.Rd1+/–) 14...Nd7 15.Ng3 f4 16.Nf5 Bg5 (better is 16...Bf8+=) 17.h4 Bh4? (better is 17...f3 18.g3 Be4 19.Ncd6 cd6 20.Nd6 Kd8 21.hg5 Bg6+–) 18.Rh4 0-0-0 19.f3 (19.Rc1 Rhe8 20.Kd2 Kb8+–) 19...Rhe8 20.Kf2 Nf8 21.Be2 Rd5 22.Rf4 Ng6?? 23.Ng7 Red8?? 24.Rc1 Nf4–+ 25.g3 Nh3 26.Kg2 Ng5 27.f4 Ne4 28.Bf3–/+ Rd4 29.Ne6 Rd2 30.Nd2= Rd2 31.Kh3?? Rd7 32.Be4 Be4–/+ 33.f5?? Bf5–+ 34.g4 Be6 (35.Rf1 h5 36.Rf6 hg4 37.Kg2 Rd2 38.Kg1 Bd5–+) 0–1. serbiansaint – GRIGOROPOULOS3, Caissa’s Web, 2004.

4.Nf3 Be7 5.Be2 h6 6.a3 Bb7 7.0-0 d6 8.d3 e5 9.Nbd2 Nc6 10.c4 d5 11.cd5 Nd5 12.Be5 0-0 13.Bb2 Bd6 14.Rc1 Nce7 15.Qc2 Ng6 16.Nd4 Qg5 17.N2f3 Qg4 18.Ne5 Qg5 19.Ndf3 Qe7 20.Ng6 fg6 21.e4 Nf4 22.g3 Nh3 23.Kg2 Bc8 24.Qc6 Bg4 25.Qc4 Kh7 26.Qc3 Qf7 27.Bd1 Bf3 28.Bf3 Qf3 29.Kh3 g5 30.Qg7 1–0. Phomopsis – orang_pendek, lichess.org, 2019.

4.a3 A) 4...Be4 5.Nc3 (5.Nf3 Nc6 6.Nc3 Bf3 7.Qf3 Nf6 8.Ne4 Be7 9.Bd3) 5...Bg6 6.Nf3 Nc6 7.b5 Na5 8.Bd3 Bd3 9.cd3; B) 4...Nf6 5.e5 (5.Nf3 Ne4 6.Nc3 Ng5 7.Be2 Bd6 8.Nb5 0-0 9.0-0) 5...Nd5 6.Nf3 a5 7.b5 Bc5 8.c4 Nf4 9.g3; C) 4...a5 5.Nc3 (5.ba5 Ra5 6.Nc3 Nf6 7.Nf3 Ne4 8.Be2 Nd6 9.0-0) 5...ab4 6.ab4 Ra1 7.Qa1 Bb4 8.Nd5 Bd5 9.Bg7.

4.b5+= A) 4...Be4 5.Nc3 (5.Nf3 Nf6 6.Nc3 Bc5 7.Be2 a6 8.Ne4 Ne4 9.0-0) 5...Nf6 6.Ne4 Ne4 7.Qf3 d5 8.Bd3 Nc5 9.Ne2; B) 4...a6 5.Nc3 (5.Nf3 Be4 6.Nc3 Nf6 7.Ne4 Ne4 8.Bd3 f5 9.a4) 5...ab5 6.Bb5 Nf6 7.Qe2 Bc5 8.Nf3 Nc6 9.0-0; C) 4...Nf6 5.e5 (5.Nc3 Ne4 6.Nf3 a6 7.Ne4 Be4 8.a4 Bd6 9.d3) 5...Ne4 6.Nf3 a6 7.Nc3 Nc3 8.Bc3 ab5 9.Bb5.

4.Nc3 a6 5.a3 (5.Nf3 Bb4 6.Bd3 Nc6 7.0-0 Nge7 8.Re1 Ng6 9.e5) 5...Nc6 6.Nf3 Nf6 7.e5 Nh5 8.Be2 d6 9.ed6.

4.Nc3 Bb4 5.a3 Bc3 6.Bc3-/+.

4.Nc3 Bb4 5.Bc4 Nf6 6.Nge2 Nc6 7.0-0 0-0 8.Bb3 Na5 9.f3.

4.Nc3 Bb4 5.Nf3 Nc6 6.a3 Be7 7.Bc4 Nf6 8.0-0 0-0 9.Qe2.

4.Nc3 Bb4 5.Qg4 h5?? (better 5...Nf6 6.Qg7 Rg8-/+) 6.Qg7+- Qf6 7.Qf6 (7.Nb5 Qg7 8.Bg7 Rh7 9.Nc7 Kd8=) 7...Nf6 8.Nb5 Ne4? (better 8...Ke7 9.a3 Ba5 10.Nc7 Be4 11.Na8 Ba8+/-) 9.Bh8 Bd2 10.Ke2 Na6 (10...Ba6 11.c4 Bb5 12.cb5 a6+-) 11.f3 0-0-0 (11...Ke7 12.fe4 Bh6 13.Bb2 Be4 14.c4+-) 12.fe4 Ba5 (12...Rh8 13.Kd2 Be4 14.Na7 Kb7 15.Nb5+-) 13.Bf6 Rg8 14.Nf3 (14.Na7 Kb8 15.Nb5 Be4+-) 14...Be4 15.Na7 Kb7 16.Nb5 Nb4 (16...Bc2 17.Ne5 Ba4 18.Rb1+-) 17.c4 c6 (17...d5 18.cd5 Nd5+-) 18.Nd6 (18.Nd6 Ka8 19.Ne4+-) 1-0. OnlyPolishOpening (2480) - brodov (2005), lichess.org, 2021. (=1.e4 e6 2.b4 b6 3.Bb2)

4.Nc3 Nc6 5.b5 Nce7 6.d4 (6.Nf3 Nf6 7.Bd3 a6=) 6...Ng6 7.Nf3 (7.a3 f5 8.ef5 ef5=) 7...Bb4 8.Bd3 (8.Nd2 Qf6=) 8...Qe7 (8...Nf6!? 9.Nd2 a6=) 9.0-0 Bc3 10.Bc3 0-0-0 (better 10...a6!?+=) 11.a4+/- Nh4 (11...Nf6 12.Qe1+/-) 12.Nh4+- Qh4 13.f3 g5 (13...Ne7 14.a5+-) 14.d5 (better 14.a5+-) 14...ed5?? (better 14...f6+-) 15.Bh8 de4 (15...g4 16.e5 g3 17.h3+-) 16.Be4 (16.fe4 Nh6 17.Be5 Qg4 18.Qg4 Ng4+-) 16...d5 (16...Be4 17.fe4 Qe4 18.a5+- (18.Rf7?! Nh6 19.Rf6 Ng4+-)) 17.Bf5 Kb8 18.Qd4 Ne7 (18...Qd4 19.Bd4 h6+-) 19.Bf6 (19.Qh4 gh4 20.Bf6 Nf5 21.Bd8 h3+-) 19...Nf5?? (better 19...Qd4 20.Bd4 Nf5+/-) 20.Qh4+- gh4 21.Bd8 Ne3 (21...h3 22.g4 Kc8 23.Bf6+-) 22.Rfe1 (22.Rf2!? h3+-) 22...Nc2 23.Re8 (23.Bc7!? Kc8 24.Rac1 Ne1 25.Bb6 Kd7 26.Rc7 Kd6+-) 23...Na1 24.Bh4 (better 24.Bf6 Bc8 25.Ba1+-) 24...Bc8 25.Bg3 d4 (25...Nb3 26.Rf8 f5 27.Rf7+-) 26.Re7 Bb7 (26...Be6+-) 27.Rc7 Ka8 28.Rf7 Bd5 (28...Bc8+-) 29.Rf8 Kb7 30.Rb8 1-0. OnlyPolishOpening (2470) - brodov (2005), lichess.org, 2021. (=1.e4 e6 2.b4 b6 3.Bb2)

4.Nc3 Nf6 5.e5 (5.b5 Ne4 6.Nf3 a6 7.Ne4 Be4 8.a4 Bd6 9.d3) 5...Ne4 6.Qf3 d5 7.ed6 Nd6 8.Qg4 h5 9.Qf4.

4.d3 Nc6 5.a3 f6 6.Nd2 Nge7 7.Qg4 (7.h4 Nc8=) 7...h5 (7...Ng6 8.Ngf3+=) 8.Qh3 Ng6 9.Be2 Nf4 10.Qf3 g5 11.Nh3 e5 (better is 11...Ne5!? 12.Be5 fe5 13.Nf4 gf4+=) 12.Nf4+/– ef4 13.Qh3 h4 14.Qf5 Rg8?? (better is 14...Bg7+=) 15.Bh5 (15.Bh5 Rg6 16.Bg6 Ke7 17.Qf6) 1–0. Cruz Vera,Javier – Gonzalez Diaz,Eusebio, San Cristobal ESP, 1st Verano Open, 2012.

4.f3 d5 5.ed5 Bd5 (5...Bb4?? 6.Bg7 Bd5 7.Bh8+–; 5...Qd5?! 6.a3=; 5...ed5?! 6.a3=) 6.c4 (6.a3 Nf6=) 6...Bb7 (6...Bc4!? 7.Bc4 Qh4 8.g3 Qc4–/+) 7.a4 Nf6 (7...Bb4?? 8.Bg7 Bd6 9.Bh8 Qh4 10.Ke2 Qc4 11.d3+–) 8.d4? (better 8.b5!?=+) 8...Bb4–+ 9.Nc3 (9.Bc3 Nc6 10.Ne2 a5–+) 9...0-0 10.Qd3 Nbd7 11.h3 (better 11.Rd1–+) 11...c5 12.dc5 Bc5 (12...Nc5 13.Qe3–+) 13.Nge2 Qe7 14.Nb5 Bb4 (14...Rad8 15.Qb3 Bb4 16.Bc3 Bc3 17.Nec3–+) 15.Nec3 (15.Bc3 a6 16.Qd2 Bc5–+ (16...ab5?! 17.Bb4 Nc5 18.cb5–/+)) 15...Rfd8 16.0-0-0 (16.Qe3 Nc5 17.Ba3 Ba3 18.Na3 Nh5–+) 16...Nc5 17.Qc2 a6 18.Nd4 Rac8 19.h4 Ncd7 (19...Qc7 20.Kb1–+) 20.Ne4 (20.Be2 Ne5 21.Qb3 Nh5–+) 20...Ne4 21.fe4 Nc5 22.g3 (22.e5–+) 22...Be4 23.Qh2 Bh1 (better 23...Qf6 24.Rd2 Bd2 25.Qd2 Bh1 26.Qf4–+) 24.Qh1 Rd4 (better 24...Na4 25.Qf3–+) 25.Bd4 Nb3 (25...Na4 26.Qf3–+) 26.Kc2 Nd4 27.Rd4 Qf6 28.Qg1 (28.Kd3–+) 28...Bc5 29.Qg2 (29.Rf4 Qf4! 30.gf4 Bg1–+) 29...Bd4 30.Bd3 Ba1 31.Kb1 (31.Kd1 Rd8 32.Qe4 Qf1 33.Kc2 Qf2 34.Kc1 Qg3 35.Kd2–+) 31...Bd4 (better 31...Rd8 32.Bh7 Kh7 33.Qc2 Kg8 34.Ka2–+) 32.Qe4?? (32.Kc2 Rd8 33.Qf1–+) 32...g6 (32...Qf2 33.Kc1 Bc3 34.Qe2 Qg3 35.Kc2–+) 33.h5 Ba1 (better 33...Qf2 34.Qe2 gh5 35.Kc2–+) 34.Qe2 (34.Kc2 Qf2 35.Qe2 Qg3 36.hg6 hg6–+) 34...Qc3 (34...Rd8 35.hg6 Rd3 36.gf7 Kf8 37.c5 Rb3 38.Kc1 Qc3 39.Qc2 Qe1 40.Qd1 Rc3 41.Kb1 Qd1 42.Ka2 Qe2 43.Ka1 Rc1) 35.hg6 hg6 36.g4 b5! 37.ab5 (37.cb5 Qb3 A classical mating theme) 37...ab5 38.cb5 Qc1 39.Ka2 Ra8 40.Kb3 Qc3 0–1. Delboy Smith (1710) – bnolan (1900), ChessWorld.net, 2013.

4.Nf3 Nc6 5.b5 (5.a3 Nf6 6.Bd3 Be7 7.0-0 0-0 8.b5 Na5 9.Nc3) 5...Na5 6.Nc3 Nf6 7.Bd3 Bd6 8.Qe2 e5 9.0-0.

4.Nf3 Be4 5.Nc3 (5.b5 Nf6 6.Nc3 Bc5 7.Bd3 Bd3 8.cd3 a6 9.Qa4) 5...Bg6 6.b5 Nf6 7.Ne5 Bd6 8.Qf3 c6 9.Ng6.

4.Nf3 Nf6 5.e5 (5.b5 Ne4 6.Nc3 Nd6 7.Bd3 a6 8.a4 Be7 9.0-0) 5...Nd5 6.b5 a6 7.c4 Nf4 8.g3 Ng6 9.Bg2.

4.Nf3 h6 5.d3 Nf6 (5...Bb4!? 6.Nbd2 Nf6–/+) 6.a3= Be7 7.Nc3 c6 (7...c5 8.bc5 bc5 9.e5=) 8.Be2 (8.e5 Nd5+/–) 8...d5 9.e5 Nfd7 10.Qd2 d4 (10...0-0 11.0-0+=) 11.Ne4 Qc7 (11...c5!? 12.Nd6 Bd6 13.ed6 Nc6+=) 12.Nd4 Ne5 13.0-0 Nbd7 (better is 13...Ned7!?+/–) 14.f4+– Ng6? (14...c5 15.Nb5 Qc6 16.fe5 Qb5+–) 15.f5 ef5 (15...Bg5 16.Ng5 (16.fg6 Bd2 17.gf7 Ke7 18.Nd2 Nf6+=) 16...hg5 17.fg6 Qh2 18.Kf2 Qh4 19.g3 Qh2 20.Ke1 Qg3 21.Kd1+–) 16.Nf5 0-0-0 17.Ne7 (17.Bg7?! Rh7+–) 17...Ne7 18.Rf7 Ng6 (18...Rhe8 19.Rg7 c5+–) 19.Bh5 Nge5 (19...Nh4 20.Qf2 g6 21.Bh8 Rh8 22.Nf6 gh5 23.Nd7+–) 20.Re7 Qd6 (20...Qb8 21.Qe3 c5 22.bc5 Be4 23.Qe4 Nc5 24.Be5 Ne4 25.Bg4 Rd7 26.Bb8 Kb8 27.Bd7 Nf6+–) 21.Nd6 Kb8 22.Nb7 Kb7 23.Be5 Kc8 24.Qc3 c5 (24...Nc5 25.bc5 Rd3 26.Qd3 Rf8 27.Qd7) 25.Qc4 Rhf8 (25...Rdf8 26.Qd5 Rf1 27.Rf1 Ne5 28.Qa8) 26.Qa6 1–0. Janek – tobokin, internet, 2017.

4.Bg7+– f6 5.Bh8 Nh6 6.c3 Kf7 (6...Nf7 7.cb4 Nh8 8.d4+–) 7.cb4 Kg8 (7...Qh8 8.Qc2 f5 9.d4+–) 8.Bf6! Qf6 9.Nc3 d6 (9...a6 10.Rb1+–) 10.Rc1 Bb7 11.Nb5 Na6 (11...Nc6 12.Nc7 Rc8 13.Nb5+–) 12.Nc7 Rc8 13.Na6 Ba6 (13...Rc1 14.Qc1 Ba6 15.Qc3 Qc3 16.dc3+–) 14.e3 (better is 14.Rc8 Bc8 15.e3+–) 14...Bf1 (14...Rc1 15.Qc1 Bb7+–) 15.Rc8 Kg7 16.Rc7 Kg6 17.Qc2 (17.Qc2 Nf5 18.Rf1+–) 1–0. pcmvr – cervejarj, net–chess.com, 2017.

4.Bg7+– Nf6 5.Bh8 Bb7 6.e3 Nd5 (6...Nc6 7.a3 Be7 8.d4+–) 7.Be2 (7.c3 Bd6+–) 7...Nc6 (7...f6 8.c3 Be7 9.Qc2+–) 8.0-0 f6 9.c4 Nde7 (9...Nf4 10.ef4 Kf7 11.Ne5 Ne5 12.fe5 Qh8 13.Qa4+–) 10.Bf6 d5 (10...Kf7 11.Bc3+–) 11.d4 (11.a3 Ba5+–) 11...Qd6 (11...Qd7 12.Nbd2+–) 12.Ne5 (12.Ng5 Qd7+–) 12...0-0-0 (12...dc4 13.a3 Ng8 14.Bh5 Kf8 15.Bh8+–) 13.Nf7 (13.Nf7 Qd7 14.Nd8 Qd8 15.a3+–; 13.a3 Ba5 14.Nf7 Qd7 15.Nd8 Qd8 16.cd5 Qd5+–) 1–0. Bommert,Christian – Krueger,Sven, Dortmund ABC Anfaenger, 2002.

(--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6).

4.e3 a5 5.b5 (---> 1.b4 a5 2.b5 b6 3.e3 Bb7 4.Bb2 e6 5.Nf3).

4.e3 Nc6 5.a3 Nf6 (--> 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Nc6).

4.e3 Nf6 5.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3).

4.e3 Nf6 5.a3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7).

4.e3 Nf6 5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 d6 9.Be2 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 d6 6.Be2 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1).

4.e3 Nf6 5.b5 Be7 6.c4 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 Be7).

4.g3 Nc6 5.a3 Nf6 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3 Nf6 5.a3 Nc6).

4.g3 Qe7 5.a3 Nf6 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3 Nf6 5.a3 Qe7).

4.g3 Nf6 5.Bg2 Be7 6.a3 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3 Nf6 5.a3 Be7 6.Bg2).

4.e3 Nf6 5.b5 Bb7 6.c4 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 b6 5.e3 Bb7 6.Nf3).

4.g3 Nf6 5.a3 a5 (5...c5 6.b5=) 6.b5 Bb7 7.Bg2 Be7 8.0-0 0-0 9.d3 Qe8 (9...c6 10.c4=) 10.e3 d6 11.c4 Nbd7 (11...e5 12.Nc3=) 12.Nd4 Bg2 13.Kg2 Nc5 14.Nc6 Nfd7 15.Ne7 (15.d4 Ne4+=) 15...Qe7= 16.a4 (16.d4 Qf6=) 16...e5 (16...Rac8 17.Nc3=) 17.Nc3 Nf6 (17...Qf7 18.Nd5 Rac8 19.f3=) 18.d4 ed4 19.ed4 Nce4 20.Re1 Qf7 21.Qd3 (21.d5 Rae8=) 21...Rae8 22.f3 Nc3 23.Bc3 d5 (23...f4 24.d5=) 24.c5 g6 (24...f4 25.g4= (worse is 25.gf4 Nh5 26.Bd2 Nf4 27.Bf4 Qf4+=)) 25.Re8 (25.Bd2 Nh5+=) 25...Re8 26.Re1 Re1 (26...f4 27.Re8 Ne8 28.Bd2 fg3 29.hg3+=) 27.Be1 Qe7 (27...Nd7 28.Qe3+=) 28.Bf2 Kf7 29.Qe3 Nd7 30.Qe7 Ke7 31.Be3 Nf8 (31...bc5 32.dc5 Kd8 33.Bd4+=) 32.Kf2 (32.Bg5 Ke8 33.c6 Ne6+=) 32...Ne6= 33.c6 g5 34.Ke2 Kf6 35.Kd3 h5 36.h3 ½–½. Agrest,Roman (2070) – Halleroed,Ralph (2125), Schack–SM, 2008. (=1.Nf3 b6 2.b4 e6 3.Bb2 f5)

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.Nf3).

4.a3 Bb7 5.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3).

4.a3 Bb7 5.g3 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3 Nf6 5.a3).

4.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.Nf3).

4.d4 Bb4 5.c3 Be7 6.Nbd2 Bb7 7.Qc2 d5 8.c4 c6 9.e3=+ Nbd7 10.Be2 0-0 11.0-0-0 c5 12.g4 Rc8 13.h3 dc4 14.Qc4?? cd4 15.Nd4 Rc4 (15...Rc4 16.Nc4 Bh1 17.Rh1 Qc7–+; 15...Bh1 16.Rh1 Rc4 17.Nc4–+) 0–1. Matthias – kalle, mySchach.de, 2004.

4.g3 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3 Nf6).

4.Nf3 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3).

4.Nf3 Nc6 5.a3 Nf6 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3 Nf6 5.a3 Nc6).

3.a3 a6 4.e3 cb4 5.ab4 Nf6 6.c3 g6 7.Nf3 Bg7 0–1. ekosachro (2435) – danielro (2290), net–chess.com, 2011.

3.a3 Qb6 4.Nf3 Nf6 (4...Nc6 5.Nc3 cb4 6.ab4 Nb4 7.e3=+) 5.Nc3 (5.Bf6!? gf6 6.bc5 Bc5 7.e3=) 5...cb4=+ 6.Na4 Qc6 7.ab4 Bb4 8.Bf6 gf6 9.c3 Be7 10.g3 (10.Nd4 Qc7=+) 10...d5 11.Bg2 b5 12.Nb2 a6 13.0-0 Qb6 14.Qb1 Bb7 15.e4 (better 15.c4!?-/+) 15...de4-+ 16.Nd4 f5 17.Nc4 Qc7 18.Na5 Bd5 19.d3 (19.f3 e3!-+) 19...Qc3 20.de4 Bc4?? (better 20...fe4 21.Nab3 f5-+) 21.Nc4 Qd4 (21...bc4 22.Qb7 Qd4 23.Rfd1+- (23.Qa8?! 0-0+/-); 21...Qc4 22.Nb5 0-0 23.Rc1 Qb5 24.Qb5 ab5 25.Ra8 fe4 26.Be4+-) 22.ef5 Ra7 (worse 22...bc4 23.Ba8 0-0 24.fe6 fe6 25.Ra4+/-) 23.Ne3 e5 (23...0-0!?=+) 24.Rd1= Qb6 25.Nd5 Qc5? (25...Qd6!?+=) 26.f6 (better 26.Rc1 Qd6 27.Rc8 Bd8 28.Qb4 Qb4 29.Nb4+-) 26...Bd6?? (26...Bd8 27.Qf5 Nd7+-) 27.Qf5 (27.Rc1 Nd7+-) 27...Nd7 (27...Rd7 28.Rac1 Qa7 29.Nb4+-) 28.Rac1 Qa3 (28...Rg8+-) 29.Rc8 1-0. black_bishop_88 (2635) - dociv (2030), lichess.org, 2020. (=1.a3 c5 2.b4 e6 3.Bb2)

3.a3 Nc6 4.bc5 f6 (4...e5!?=) 5.d4+– d6 6.c4 (6.cd6!? Bd6 7.e4+–) 6...dc5= 7.d5 ed5 8.cd5 Ne5 (8...Qb6 9.Bc3 Ne5 10.e4+=) 9.e4+= b6? (9...Bd6 10.Nf3+=) 10.Qc2 (better 10.Be5 fe5 11.Qh5 Ke7 12.Qe5 Kf7 13.Qf4 Qf6 14.Qc7 Qe7 15.Qe7 Ne7 16.Nf3+–) 10...Ba6?? (better 10...Bd6=) 11.Ne2 (better 11.Ba6 Bd6 12.Ne2+–) 11...Qc7?? (11...Nd3 12.Kd2 Nf2 13.Qa4 Kf7–/+) 12.Nd2?? (12.Qa4 b5 13.Qa6 Nd3 14.Kd2 Nf2+–) 12...0-0-0?? (better 12...Nd3!? 13.Kd1 Nf2 14.Ke1–+) 13.0-0-0?? (13.Nf4 Bf1 14.Kf1 Qf7+–) 13...Bd6?? (13...Nd3 14.Kb1 Nf2 15.Nf4 Bf1 16.Rhf1 Nd1 17.Qd1–/+) 14.Nc4?? (better 14.Nf4 Bf1 15.Rhf1+–) 14...Nc4–+ 15.Bf6?? (15.Ng3 Bf4 16.Kb1–+) 15...Nf6 16.e5 (16.g3 Be5 17.Nc3 Bc3 18.Bc4 Bc4 19.Qc3 Be2–+) 16...Be5 17.f4 (17.Qa4 Bb5! 18.Qb3 Nd5–+) 17...Bd6 (better 17...Bb2 18.Qb2 Nb2 19.Kb2 Nd5 20.Nc3 Bf1 21.Nd5 Rd5 22.Rhf1 Rd1 23.Rd1–+) 18.Nc3 (18.g3 Ne3 19.Qa4 Be2 20.Be2 Nd1 21.Rd1 Nd5 22.Bf3–+) 18...Bf4 19.Kb1 Na3 20.Kb2 Nc2 21.Kc2 Bf1 (21...Bf1 22.Rhf1 Ng4–+) 0–1. pat_cash87 – advice01, lichess.org, 2020.

3.b5 Qb6 4.c4 a6 5.a4 ab5 6.cb5 Nf6 7.e3 d5 8.Nf3 Nbd7 9.d4 c4 10.Nc3 Be7 (10...Bb4!?–/+) 11.Be2 0-0 12.0-0 Bb4 13.Qc2 Bc3 (better is 13...Re8!?=) 14.Bc3+= Ne4 15.Rab1?? (better is 15.Bb4 Nd6 16.a5+/–) 15...Nc3–/+ 16.Qc3 Ra4 17.Bd1 Ra8 18.Bc2 Nf6 19.Qd2 Bd7 20.Ne5 Be8 (20...Bb5?! 21.Qb4 Ra5 22.Ba4 Ra4 23.Qa4 Qd4 24.ed4 Ba4 25.Rb7=) 21.Qe2 Ne4?? (21...Bb5 22.Rb4 Ra5 23.Rfb1–/+) 22.f3?? (better is 22.Be4 de4 23.Nc4+=) 22...Nf6 23.Qf2 Bb5 24.Qh4 h6 25.Rb4 c3 26.Rfb1 Ra2?? 27.Rb5+– Qa6 28.Bd3 Qa3 29.R5b3 Qa5 30.Rb5?? Qa4?? 31.R5b4 Qa5 32.Rb5?? Qa4?? 33.R5b4?? Qa5 34.Ng4?? Ng4= 35.Qg4? Rd2–+ 36.Rb5 Qa2 37.h4?? Rd3–+ 38.f4 c2 39.R1b2 Qa1 40.Kh2 c1Q 41.Rb1 Qab1 42.Rb1 Qb1 43.h5 Re3 44.f5 Qf5 45.Qf5 ef5 46.Kg1 Re4 47.Kf2 b5 48.Kf3 b4 49.g4 b3 (50.g5 hg5 51.Kg2 b2 52.h6 Re2 53.Kf1 Rfe8 54.h7 Kh7 55.Kg1 b1Q) 0–1. slavisa10 – migottaichibolz9, caissa.com, 2004.

3.b5 c4 4.e4 Qc7 (better is 4...d5!?=) 5.Qe2+/– a6 6.a4 (6.Qc4!? Qc4 7.Bc4 ab5 8.Bb5+/–) 6...ab5 7.ab5 Ra1 8.Ba1 Qa5 9.Qc4 Nf6?? (better is 9...Qa1 10.Qc8 Ke7+=) 10.Qc8+– Ke7 (10...Qd8 11.Qb7 Be7 12.Bd4+–) 11.Bc3 (11.Be5 Qb4 12.Nc3 Ne4+–) 11...Qa7 (11...Qa2 12.Bb4 d6 13.Qc7 (13.Qb8?! Qb1 14.Ke2 Qb4 15.Qb7 Kd8+–) 13...Nfd7 14.Nc3 (worse is 14.Qd6 Ke8 15.Nc3 Qa1 16.Nd1 Bd6 17.Bd6 Qa4+=) 14...Qa1 15.Ke2+–) 12.Bb4 (12.Bb4 d6 13.e5+–) 1–0. GuestKVNL – GuestBRZJ, freechess.org, 2017.

3.b5 d6 4.c4 a6 5.a4 b6 6.e3 a5 7.Nc3 Bb7 8.Nf3 Nd7 9.Be2 h6 10.d4 cd4 11.ed4 Ngf6 12.0-0 Be7 13.d5 e5 14.Bd3 Rc8 15.Rc1 Nc5 16.Bc2 Qd7 17.Ba3 e4 18.Bc5 dc5 19.Be4 Ne4 20.Ne4 0-0 21.Ne5 Qf5 22.d6 Be4 23.de7 Rfe8 24.Nc6 Bc6 25.bc6 Re7 26.Re1 Rec7 27.Rc3 Rc6 28.Rce3 Re6 29.Re6 fe6 30.Qd7 Rf8 31.Qe6 Kh7 32.Qf5 Rf5 33.Re6 Rf4 34.Rb6 Rc4 35.g3 Ra4 36.Rb5 c4 37.Rc5 g5 38.Kg2 Kg6 39.h3 h5 40.Kh2 g4 41.hg4 hg4 42.Kg2 Kf6 43.Rc6 Ke5 44.Rg6 c3 45.Rg4 Rg4 0–1. A_VB – flamic77, lichess.org, 2019.

3.b5 f6 (--> 2.Bb2 f6 3.b5 c5).

3.c3 b6 4.a3 Bb7 5.e3 d5 6.Nf3 Nf6 7.Be2 Bd6 8.h3 0-0 9.0-0 Re8 10.d3 e5 11.Nbd2 e4 12.de4 de4 13.bc5 ef3 14.cd6 fe2 15.Qe2 Qd6 16.Rad1 Qc6 17.Nf3 Nbd7 18.c4 a5 19.Bf6 Nf6 20.Qd3 h6 21.Rd2 Rad8 22.Qd8 Rd8 23.Rd8 Kh7 24.Rfd1 g5 25.R8d6 Qa4 26.Rf6 Qd1 27.Kh2 Bf3 28.Rf3 Kg6 29.Kg3 Qa4 30.e4 Qc4 31.Re3 b5 32.f3 Qc7 33.Kf2 Qc5 34.Ke2 b4 35.ab4 ab4 36.e5 Qc2 37.Ke1 b3 0–1. Phomopsis – wilcopro, lichess.org, 2018.

3.bc5 d6 4.cd6 Bd6 5.Bg7 Qb6 6.Bh8 Qb2 (6...Nd7+–) 7.Bb2 f6 8.e3 Nc6 9.Qh5 Kd8 10.Qh7 Nce7 11.h4 (11.Qd3!? Kc7+–) 11...Bd7 12.h5 Rc8 13.h6 Rc2 14.Qc2 Nh6 15.Rh6 Bc6 16.Bf6 Kd7 17.Rh7 Bb5 18.Bb5 Kd8 19.Rh8 1–0. Panza (2490) – jems123, ChessWorld.net, 2007.

3.bc5 f5 4.e3 h5 (4...Nf6 5.d4+/–) 5.d4 Nc6 6.Nf3 g5?? (better is 6...b6+/–) 7.d5+– (7.d5 Rh7 8.dc6 bc6 9.h4+–) 1–0. Wall,Bill – Guest2732, internet, 2003.

3.bc5 Nf6 4.d4+=.

3.bc5 Qg5 4.Nf3 Qc5 5.Ba3 Qf5 6.Bf8 Kf8 7.e3 Qf6 (7...e5 8.d4 e4 9.Nfd2+=) 8.Nc3 d5 9.Be2 Nh6 10.0-0 Ke7 (10...Nc6 11.Rb1+=) 11.Rb1 Rd8 12.Nb5 (12.d4 Kf8+=) 12...Rd7 13.c4 a6 (13...dc4!? 14.Bc4 Nc6+=) 14.Qa4+– Nc6 (14...Kf8 15.cd5 ed5 16.Nbd4+–) 15.cd5 (15.Qa3 Ke8 16.Nd6 Rd6 17.Qd6 dc4 18.Bc4+–) 15...Rd5? (15...ed5 16.Nbd4+–) 16.Nc7 (better 16.Qa3!? Kd7 17.e4 Rb5 18.Bb5 Ke8+–) 16...Ra5 17.Qb3 Rb8 (17...Ra7 18.Rfc1 Kd7 19.Qb6+–) 18.Qb6 (better 18.Rfc1 e5 19.Nd5 Rd5 20.Qd5+–) 18...Kf8?? (18...Bd7 19.Rfc1 Qg6 20.Nd4+–) 19.Na6! ba6?? A deflection. (19...Ra6 20.Ba6) 20.Qc6 Eliminates the defender c6 20...Rb1 (20...Rab5 21.Rb5 ab5 22.Qd6 Qe7 23.Qb8 Qb7+–) 21.Qc8 Ke7 22.Qc7 (22.Rb1!? Rb5 23.Rc1 Qf3 24.Bf3 Kf6+–) 22...Kf8 (22...Ke8 23.Rb1 Rd5+–) 23.Rb1 Ra2 24.Rb8 (24.Rb8 Qd8 25.Qd8) 1–0. aravind555 – justin_andrew, lichess.org, 2019.

3.bc5 Qh4 4.e3 Nc6 5.Nf3 Qd8 6.d4 b6 7.Nbd2 Nf6 (7...bc5 8.dc5 f6 9.Nd4+–) 8.Bd3 (8.cb6 Qb6 9.Bc3 Nd5+–) 8...bc5+= 9.dc5 Bc5 10.0-0 0-0 11.Rb1 a5 12.Nb3 Bb6 (12...Be7 13.Ng5 e5 14.f4+=) 13.a3 a4 14.Nbd2 d5 (14...Bc5 15.Ng5 e5 16.Nde4 Ne4 17.Ne4+=) 15.Bf6 gf6 16.c3 (16.c4 Ne5 17.Ne5 fe5 18.Qg4 Kh8+=) 16...Bc5= 17.Ra1 Qa5 (17...Qd6 18.c4=) 18.Qc2+= f5 19.e4?? (better 19.Rfb1+=) 19...de4 20.Nc4 (20.Ne4!? fe4 21.Be4–+) 20...Qd8 21.Be4 fe4 22.Qe4 Qd5 (22...Bb7–+) 23.Qd5? (better 23.Qg4 Kh8 24.Rfd1–/+) 23...ed5–+ 24.Ncd2 (24.Ne3 Be6–+) 24...Bf5 25.Rfc1 (25.Rfd1 Rab8–+) 25...Rab8 26.Ra2 Rfe8 27.Nf1 (27.c4 d4–+) 27...Ne5 (27...Bd3 28.Rd1 Bc4 29.Raa1–+) 28.Ne5 (28.Nd4 Bd3–+) 28...Re5 29.Ng3 (29.Rd1 Rb3–+) 29...Bg6 (29...Bd3 30.h4–+) 30.Rd1 (30.Rd2 Ba3 31.Rcd1 Rb2 32.Rd5 Rd5 33.Rd5 Rb1 34.Nf1 Bb2–+) 30...Rb3 31.Rc1 (31.Ne2 Ra3 32.Ra3 Ba3–+ (32...Re2?! 33.Ra4 Be4 34.Ra5 Bf2 35.Kf1–+)) 31...Re8 (31...Bd3 32.h4–+) 32.Nf1 Ra3 33.Ra3 Ba3 34.Rd1 (34.Ra1 Bb2 35.Ra4 Re1–+) 34...Rd8 (34...Bb2 35.Ne3–+) 35.Rd2 (35.Ne3 Be4 36.f3 Bf3 37.gf3 Bc5–+) 35...Bc5 (35...Bc1 36.Rd4 a3 37.Ra4–+) 36.Ra2 (36.Ne3 a3 37.Nd5 a2 38.Ra2 Rd5–+) 36...a3 37.Rd2 (37.h3 Rb8 38.Nd2 Rb2 39.Ra3 Ba3–+) 37...Bf5 (37...Bb1!? 38.g4–+) 38.Ne3 (38.g4 Bb1–+) 38...Be6 (38...Be3!? 39.fe3 Bb1 40.c4–+) 39.c4 (39.Kf1 d4 40.cd4 Bd4–+) 39...d4 40.Kf1 (40.Nf1–+) 40...a2! 41.Rd1 (41.Ra2 de3 Annihilates a defender: e3) 41...d3 (41...de3 42.Rd8 Kg7 43.Rd1 Bc4 44.Kg1 ef2 45.Kh1 f1Q 46.Rf1 Bf1 47.h4 a1Q 48.Kh2 Bd6 49.Kg1 Bg3 50.h5 Bd3) 42.Nd5 Bd5 43.cd5 Rd5 (better 43...Rb8 44.g3 Rb1 45.Kg2 Rd1 46.Kh3–+) 44.Ra1 d2 (44...d2 45.Ke2 d1Q 46.Rd1 Rd1 47.Kd1 a1Q 48.Kc2 Qa4 49.Kd2 Qd4 50.Kc2 Qc4 51.Kd2 Bb4 52.Ke3 f5 53.f3 f4 54.Kf2 Qd4 55.Ke2 Qe3 56.Kd1 Qd2) 0–1. petrobbo (1995) – OrangAttackMan (1930), ChessWorld.net, 2015.

3.Nf3 cb4 4.e3 Nf6 5.Bd3 d5 6.0-0 Bc5 7.c4 dc4 8.Bc4 Nc6 9.d4 Bd6 10.Bd3 Bb8 11.Qe2 Qd6 12.e4 Nd4?? (better 12...Qe7=) 13.Nd4?? (better 13.Bd4 Qc7 14.a3+-) 13…Qh2 0-1. CronusCR (2155) - Schachmalanders (2190), Rated Bullet game, lichess.org, 2017.

3.Bg7?? cb4 (3...Bg7 4.c3 cb4 5.e3-+) 4.c3 (better 4.Bh8 d5 5.Nf3+-) 4...Bg7-+ 5.d4 bc3 6.Nc3 Qb6 7.Rc1 (7.e3 d5-+) 7...Qa5 (7...Bd4!? 8.e3 Bc5 9.Bd3-+) 8.e3 e5 9.Qg4 ed4?? (better 9...Bf6 10.Qh5 Nc6-+) 10.Qg7+- Qd5?? (10...dc3 11.Nf3 Nc6 12.Qh8 Kf8+-) 11.Nd5 d6 12.Rc8 Kd7 13.Qf7 (13.Qg4 f5 14.Qf5) 13...Kc8 (13...Ne7 14.Qe7 Kc8 15.Qc7) 14.Qc7 1-0. FeegLood (2700) – Chesshedron, lichess.org, 2016.

4.ab4 (--> 1.b4 c5 2.a3 cb4 3.ab4 e6 4.Bb2).

4.e3 ba3 5.Ba3 Ba3 6.Na3 Nf6 7.d3 (7.Nb5 0-0 8.Na7 d5=) 7...0-0 8.c4 Nc6 9.Qc2 (9.Nf3 d5–/+) 9...d5 10.0-0-0? (better 10.Nf3!?–/+) 10...dc4 (10...e5 11.Kd2–+) 11.Qc4 (11.Nc4 b5 12.Na3 Nb4–+) 11...Qa5 12.Nb5 Bd7 13.d4 (13.Nc3 Rfc8 14.Kb2 Nd4 15.ed4 Rc4 16.dc4 Qb4 17.Kc2 Ba4 18.Na4 Qa4 19.Kc1 Ne4–+) 13...Rac8 (better 13...Ne4 14.Nh3 a6–+) 14.Bd3 (14.Kb2 Ne4 15.Nh3–+) 14...Nb4 (better 14...Ne5 15.Nd6 Nc4 16.Bc4–+) 15.Bh7 (15.Nd6 Nd3 16.Rd3 Qa1 17.Kd2 Rc4 18.Nc4–+) 15...Nh7 16.Nc7 Rc7 (16...Rc7 17.Kd2 Rc4–+) 0–1. pat_cash87 – mohammeddaas, lichess.org, 2020.

4.e3 ba3 5.Ba3 d6 6.Nf3. pieeater – john1007, ChessWorld.net, 2012.

4.a4 c4 5.e3 (5.e4 d5 6.Nc3 Bc5 7.ed5 ed5 8.Nd5=) 5...Qh4? (better is 5...d5!?= 6.d3 cd3 7.Bd3 Bb4 8.Nd2=) 6.Nf3+/– Qe4 7.Nc3 Qg4 8.Ne2 (better is 8.h3!? Qh5 9.Bc4+–) 8...d5+= 9.Ne5 Qh5 10.g3 f6 11.Nc4 (11.g4!? Qh6 12.Nf3=) 11...dc4–/+ 12.Nf4 (12.Nc3 Qc5–/+) 12...Qc5 (12...Qd1 13.Rd1 ab5 14.ab5–+) 13.Bg2 (better is 13.Bd4 Qc7 14.Qh5 Qf7 15.Qf7 Kf7 16.Bc4–/+) 13...e5?? (better is 13...Ne7–+) 14.Qh5+/– Ke7?? (better is 14...g6 15.Ng6! hg6 16.Qh8 Ne7+/–) 15.Ba3+– Nd7 (15...Qa3 16.Ra3 Nh6+–) 16.Bc5 Nc5 17.Nd5 Kd6 (17...Kd8 18.Qf7 Ne6+–) 18.Qe8 Ne7 19.Nb6 Rb8 20.Nc4 Kc7 (20...Ke6 21.d4 ed4 22.ed4 f5 23.dc5 g6+–) 21.b6 1–0. Trkn – shred, itsyourturn.com, 2000.

4.a4 d5 5.e3 (5.Nf3 Nf6 6.e3 Bd6 7.Be2 Nbd7 8.0-0+=) 5...Nf6 6.Nf3 Bd6 7.Be2 0-0 8.0-0=.

4.a4 Nf6 5.e3 (5.Nf3 d5 6.e3 Bd6 7.Be2 0-0 8.0-0+=; 5.ba6 ba6 6.Nf3 d5 7.Na3 Bd6 8.c4+=; 5.Nc3 d5 6.e3 e5 7.ba6 ba6 8.Rb1+=) 5...d5 6.Nf3 Bd6 7.Be2 ab5 8.ab5=.

4.e3 A) 4...Nf6 5.ba6 (5.Nf3 d5 6.ba6 ba6 7.Be2 Bd6 8.Na3+=; 5.Nc3 d5 6.Nf3 Bd6 7.Be2 e5 8.0-0+=; 5.Be2 d5 6.a4 Bd6 7.Nf3 ab5 8.ab5=) 5...Na6 6.Nf3 Be7 7.Nc3 0-0 8.Be2=; B) 4...d5 5.a4 (5.Nc3 Nf6 6.Nf3 Bd6 7.Be2 e5 8.0-0+=; 5.Nf3 Nf6 6.ba6 ba6 7.Be2 Bd6 8.c4+=; 5.Be2 ab5 6.Bb5 Bd7 7.Be2 Nf6 8.Nc3+=) 5...Nf6 6.Nf3 Bd6 7.Be2 ab5 8.ab5=.

4.e4 d5 5.ed5 (5.Qe2 Ne7 6.Nf3 ab5 7.ed5 Nd5 8.Qb5=) 5...ed5 6.Nf3 c4 7.ba6 Na6 8.Be2=.

6.Ba1 Qa5 7.Bc3 Qb5 8.Nf3 (8.e3 Qb6+=) 8...Nc6 9.e3 (9.e4 Qa4 10.Bd3 d5 11.ed5 ed5–/+) 9...Qb6 10.Bd3 (10.Na3 d5+=) 10...Nge7 (10...d5 11.0-0–/+) 11.0-0 (11.Na3 d5+=) 11...Nd5 (11...d5 12.Be2–/+) 12.Ba1 Ndb4 13.Be2 d5 14.Re1 Bd7 15.d3 (15.Nc3 c4–/+) 15...Qa5–/+ 16.Bb2 f6 (16...Qa2 17.Qc1+=) 17.c3 Na6 18.Qb3 (18.e4 d4+=) 18...Bc8 (18...b5 19.c4+=) 19.Nbd2 (19.Na3 Be7+=) 19...Be7 (19...Bd6 20.e4 Nc7 21.d4 cd4 22.Ra1=) 20.Ra1 Qc7 21.e4 de4 (21...c4 22.dc4 Nc5 23.Qc2 de4 24.Ne4 Ne4 25.Qe4=) 22.de4 (22.Ne4 0-0+=) 22...Na5 (22...0-0 23.Bc1+=) 23.Qa2 (23.Qb5 Nc6=) 23...Nc6 24.Qb3 0-0 25.Nc4 Kh8 (25...Rd8 26.Bc1=) 26.g3 (26.Nb6!?=) 26...e5+= 27.Ne3 Nab8 (27...Bd6 28.Nd5 Qf7 29.Bc1+=) 28.Nd5 Be6 29.c4 (29.Ba3 Rd8+=) 29...Bd5 (29...Qd7 30.Qb6+=) 30.ed5 (30.cd5 Nb4=) 30...Nd4 (30...Nb4!?+=) 31.Nd4+= ed4 32.Ra7 Attacking the backward pawn on b7 32...Qe5 (32...Rd8 33.Qb7 Qb7 34.Rb7+=) 33.Bf1 (better is 33.Bd3+=) 33...Na6?? (better is 33...Rd8=) 34.Qb7+– (34.Rb7?! Nb4=) 34...Nb4 (34...Rb8 35.Qe7 Qe7 36.Re7+–) 35.Qe7 Qe7 36.Re7 d3 (36...Kg8 37.Rc7 Na6 38.Rc6+–) 37.Bc3 Rd8 (37...Rb8 38.Bb4 cb4 39.Bd3+–) 38.Rb7 (38.Bb4 cb4 39.Bd3 g6+–) 38...h5 (38...Na6 39.Bd3 Kg8 40.Bf5+–) 39.Bb4 cb4 40.Bd3 Rc8 (40...Kg8 41.c5 Kf8 42.d6+–) 41.c5 Rc5 (41...b3+–) 42.Rb8 (42.Rb8 Rc8 43.Rc8) 1–0. DEFFM – GuestPYHW, freechess.org, 2018.

6.Ba1 Qa5 7.Nc3 d5=.

6.Ba1 Qa5 7.Nc3 Nf6 8.e3 d5 9.Nf3 (9.f4 c4=) 9...Be7 (9...Bd6 10.Ng5=+) 10.Be2= 0-0 11.0-0 Nbd7 12.Qb1 Qc7 13.Nd1 (13.Qa2 Qd6=) 13...b6 14.c4 Bb7 15.d4 (15.cd5!? Bd5 16.Nc3=+) 15...dc4–/+ 16.Bc4 (16.dc5 Qc5 17.Nc3 Ne5–/+) 16...cd4 17.Be2 de3 18.Ne3 Nc5 (18...Rc8 19.Bb2–/+) 19.Be5 Qc8 (19...Bd6 20.Bf6 gf6 21.Ng4–/+) 20.Qb2 Rd8 21.Rc1 Qd7 22.h3 (22.Nd4 Be4=+) 22...h6 (22...Bf3 23.gf3 Nd3 24.Bd3 Qd3 25.Bc7–+) 23.Qc2 (23.Nd4!?=+) 23...Be4–/+ 24.Qc3 (24.Qc4 Ne8–/+) 24...Qb7 (24...Bf3 25.Bf3 Qb5 26.Bc7–+) 25.Rd1 (25.Nd4 Rc8–/+) 25...Rd1 26.Bd1 Qd7 27.Be2 Qb7 (better 27...Bf3 28.gf3 Qa7–/+) 28.Bc4?? (28.Bd1 Bd3 29.Qb2–/+) 28...Ncd7 (better 28...Bf3!? 29.gf3 Qf3–+) 29.Nd2–/+ Ne5 30.Qe5 Bg6 31.Nf3 Bc5 32.Nd4 (32.Ne1 Qd7 33.Nf3 Be4–/+) 32...Qd7 (32...Be4 33.Ndc2–+) 33.Nc6 (33.Nb3 Bd6 34.Qd4 Qc7–/+) 33...Kh7 (33...Qd2 34.Qa1–+) 34.Be2? (34.Qb2–+) 34...Nd5?? (better 34...Qd2 35.Kf1 Bd3 36.Bd3 Qd3 37.Kg1 Ne4–+) 35.Nd5–/+ ed5 36.Bg4 f5 Black plans d4 37.Bf3 d4 38.Qe2 (38.Qf4 d3–/+) 38...d3 39.Qd2 (39.Qd1 Qe6–/+) 39...f4 (39...Qd6 40.Qc3–/+) 40.Ne5 (40.h4 Qf5–/+) 40...Qf5 (40...Qd4 41.Ng6 Kg6 42.h4–+) 41.Ng6 Qg6 (better 41...Kg6 42.Kf1 Bd6–/+) 42.Qf4= d2 43.Qd2 Bd6 (better 43...Qb1!? 44.Bd1 Qb5 45.Bc2 Kg8 46.Qd5 Kf8 47.Qf5 Ke7 48.Qe4 Kf7=) 44.Qe1 Kg8 45.Bd5 Kh7?? (better 45...Kf8+–) 46.Be4+– (46.Be4 Bc5 47.Bg6 Kg6 48.Qe6 Kh7 49.Qf5 Kg8 50.Qc5 bc5 51.b6+–) 1–0. BeepBeepImAJeep (2735) – gmtabito21 (2640), lichess.org, 2020.

6.Ba1 Qa5 7.Nc3 g6?? 8.Ne4+– Qb5?? (better is 8...f6 9.Nf6 Nf6 10.Bf6 Rg8+–) 9.Bh8 Qc6 10.Nf6 (10.Nc3 b5+–) 10...Nf6 11.Bf6 Na6 12.Nf3 Bd6 (12...Qa4 13.Bc3+–) 13.e3 Nb4 14.Be2 Nd5 (14...Qa4 15.c4 Qd1 16.Kd1+–) 15.Qa1 Nf6 16.Qf6 b5 (16...h6+–) 17.Ng5 Be7 (17...Qa8 18.0-0+–) 18.Qh8 Bf8 19.Qh7 Qg2 (19...Qd6 20.Qf7 Kd8 21.Qg6 Qe7+–) 20.Qf7 Kd8 21.Qf8 Kc7 22.Qf4 Kb6 23.Bf3 Qf3 24.Nf3 Bb7 25.Qd6 Ka5 26.Qc7 (26.0-0 Bd5 27.Ra1 Kb4 28.Qe5 Ba2 29.Qc3 Ka4 30.Ra2) 26...Ka6 (26...Kb4 27.0-0 Bf3 28.Rb1 Kc4 29.Qd7 Be4 30.Qe6 Bd5 31.Qg4 Be4 32.Qe4) 27.0-0 Bf3 (27...b4 28.Ra1 Kb5 29.Qb7 Kc4 30.Ne5) 28.Ra1 1–0. DEFFM – GuestRQTR, freechess.org, 2018.

6.Ba1 b6 7.e3 Nf6 (7...d5 8.Be2=) 8.Nf3 Be7 (8...d5 9.Be2=) 9.c4 (9.d4 d5=) 9...0-0 10.Be2 Ne4 (10...d5 11.d3=) 11.d3 Ng5 (11...Nf6 12.0-0=) 12.0-0 (12.Ng5 Bg5 13.Bf3 d5=) 12...d5 13.Ne5 (13.Nfd2 f6+=) 13...dc4 (13...f6 14.Nf3=) 14.Nc4+= Bd7? (better is 14...f6!?+=) 15.h4+– Nh3 16.gh3 Bh4 (16...Bb5 17.Qb3 Bc4 18.dc4 Bh4+–) 17.Qb3 (17.Nba3 e5 18.Bg4 f6+–) 17...Qg5 (17...Bc8 18.Bf3+–) 18.Kh2 e5 (18...Qd8 19.Be5+–) 19.Be5 Qf5 (19...Qh6+–) 20.Bg4 Qf6 (20...Qg6 21.Rg1 Qh6 22.Bd7 Nd7 23.Rg7 Qg7 24.Bg7 Kg7+–) 21.Bf6 (21.Bf6 Bf6 22.Nb6+–) 1–0. DEFFM – GuestYGGX, freechess.org, 2018.

6.Ba1 d5 7.e3 b6 8.c4 Bb7 9.Nf3 Nf6 10.d4 dc4 (10...cd4 11.Bd4 Bb4 12.Nbd2=) 11.Bc4 Nbd7 12.0-0 Bd6 13.Nbd2 Qc7 14.Qb3 0-0 15.Rc1 cd4 16.ed4 (16.Bd4 Rc8=) 16...Qb8 (16...Bf4 17.Rc2 Ra8 18.Bc3=+) 17.Bb2 Nd5 18.h3 Nf4 19.Qd1 Bd5 (19...Rc8 20.Qb3=+) 20.Be2 (20.g3!? Nh3 21.Kg2 Nf2 22.Kf2 Bg3 23.Ke2=) 20...Qb7-/+ 21.Bf1 Nf6 (21...Ra8 22.g3 Ra2 23.Rc2=+) 22.Bc4 (22.g3 Ng6=+) 22...Bc4 (22...Bb4 23.Bc3 Ba3 24.Ra1-/+) 23.Nc4=+ Bb8 24.Qd2? (24.Nce5 Qd5 25.Ba3 Re8=+) 24...N6d5 (better 24...Nh3!? 25.gh3 Qf3-+) 25.Nce5 Rc8 26.Nc6 (26.g3 Be5 27.Rc8 Qc8 28.de5 Ng6= (worse 28...Nh3 29.Kh2+/-)) 26...Bd6=+ 27.Nfe5 Be5 (27...Ra8!?=+) 28.de5+= Qd7?? (28...Ra8 29.Rc4 Ng6 30.Bd4+=) 29.Kh2 (better 29.Ne7! Ne7 30.Qd7 Ne2 31.Kh2 Nc1 32.Bc1+-) 29...Ng6+= 30.g3 f6 (30...Ra8 31.Bd4=) 31.ef6+= gf6 32.Re1 e5?? (32...Ra8 33.Bd4+=) 33.Qd3 (better 33.Rd1 Kf7 34.Qd5 Qd5 35.Rd5+-) 33...Qe6 34.Rd1 Nde7 35.Qd7 (better 35.Ne7 Ne7 36.Ba3=) 35...Qd7-/+ 36.Rd7 Kf7?? (better 36...Nc6 37.bc6 Rc6-/+) 37.Ne7+/- Ne7 38.Rb7 (better 38.Ba3 Re8 39.Rb7+/-) 38...Rc4?? (better 38...Ke8+=) 39.Bc1 (better 39.Ba3 Ke6 40.Re7 Kd5 41.Rd7 Ke4 42.Rb7+-) 39...Ke6?? (better 39...Rc1 40.Rb6 Rc2-+) 40.Rb6+/- (40.Rb6 Kf5 41.Ba3+-) 1-0. ClayPigeons (2170) - VKcarlsen (2250), Rated Bullet game, lichess.org, 2020.

4.e3 Bb7 5.Nf3 d5 6.c4 Nd7 7.cd5 ed5 8.Be2 Ngf6 9.0-0 Bd6 10.Nc3 0-0 11.Qc2 Rc8 12.Qf5 Re8 13.Rac1 h6 14.a4 Ne5 15.Nd1 (15.d4 Qd7 16.Qd7 Ned7 (16...Nfd7? 17.de5 Be5 18.Ne5 Ne5 19.Rfd1+-) 17.dc5 bc5= (worse 17...Rc5 18.Ba3+/-)) 15...Qc7 16.Ne5 Be5 17.Be5 Re5 18.Qh3 d4 19.d3 Rg5 20.Bf3 Bf3 21.Qf3 Ng4 22.Qh3 g6 (22...Re8 23.ed4 Qf4 24.Rc4=+) 23.f4 Nh2? (better 23...Ne3 24.fg5 Nf1 25.gh6 Re8=) 24.Qh2+- (worse 24.Kh2 Rh5 25.Qh5 gh5 26.ed4 Qd6-+) 24...Rh5 25.Qg3 de3 26.Ne3 Qd7 27.Rfd1 Qd4 (27...Rd8 28.Rc4+-) 28.Rc4 Qb2 29.Qf3 Rc7 (29...Rd8 30.f5+-) 30.f5 Rg5 31.Rf1 Kh7 32.Rh4 Qd2 (32...Re7 33.Qf4 f6+-) 33.Rd1 Qc3 (33...Rg2 34.Ng2 Qg5 35.fg6 fg6 36.d4+-) 34.Qf4 (34.Qf4 Qf6 35.Qc7 gf5 36.d4+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

4.e3 Nf6 5.Nf3 d5 6.Be2 Nbd7 7.c4 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5 7.Be2 Nbd7).

4.Nf3 Bb7 5.g3 a6 6.Nc3 (6.ba6 A) 6...Na6 7.Bg2 (7.c4 Bf3 8.ef3 Nf6 9.Be2 Be7 10.Nc3 0-0+=; 7.Nc3 Nf6 8.Bg2 d5 9.0-0 Be7 10.a4 0-0+=; 7.h3 Nf6 8.c4 Bf3 9.ef3 Be7 10.f4 0-0+=) 7...Nf6 8.0-0 Be7 9.Nc3 d5 10.a4 0-0+=; B) 6...Ba6 7.Bg2 (7.d3 d5 8.Bg2 Nf6 9.c4 dc4 10.Nfd2 Ra7=; 7.e4 Bf1 8.Kf1 Nf6 9.e5 Ng4 10.h3 Nh6=; 7.Nc3 d5 8.Bg2 Nf6 9.a4 Be7 10.0-0 Nc6+=) 7...d5 8.d3 Nf6 9.c4 dc4 10.Nfd2 Ra7=; C) 6...Bf3 7.ef3 Nf6 8.Nc3 Be7 9.Rb1 Na6 10.a3 Nc7+=) 6...ab5 (6...Nf6 7.Bg2 (7.e3 d5 8.ba6 Ba6 9.Bg2 Be7 10.d3 b5+=; 7.ba6 Na6 8.Bg2 d5 9.0-0 Be7 10.Ne5 Nd7+=; 7.a4 d5 8.ba6 Na6 9.Bg2 Be7 10.0-0 0-0+=) 7...d5 8.ba6 Na6 9.0-0 Be7 10.Ne5 Nd7+=; 6...d5 7.ba6 (7.e3 Nf6 8.ba6 Ba6 9.Nb5 Be7 10.Be2 0-0+=) 7...Na6 8.e3 d4 9.ed4 cd4 10.Nb5 d3+=) 7.Nb5 Bc6 (7...Bf3 8.ef3 Nc6 9.c4= f6 10.f4 g6+=) 8.a4 (8.Nd6 Ke7 9.Ne5 Kd6 (9...Nh6 10.Nc6 Nc6+=) 10.Nf7 Ke7+=) 8...Bb5 (8...d5 9.Bg2= f6 10.d3 Nh6=) 9.ab5+= Ra1 10.Qa1 Ne7 (10...Nf6!?+=; 10...f6+=) 11.Bg7+/– Bg7 (11...Rg8 12.Bf6+/–) 12.Qg7+– Rg8 (12...Ng6 13.Ne5 Rf8 14.Ng4+–) 13.Qh7 d5 14.h4 Qd7 (14...Nd7 15.Ng5 Rf8 16.e3+–) 15.Ne5 Rg7 (15...Qa7 16.Qf7 Kd8+–) 16.Qg7 (16.Qg7 Qb5 17.Qh8 Ng8 18.Qg8 Ke7 19.Qf7 Kd8 20.e3 Qb1 21.Ke2 Qb5 22.c4+–) 1–0. Janek – Vesely, internet, 2016.

4.Nf3 Nf6 5.e3 Be7 6.Be2 0-0 7.0-0 Bb7 8.a4 d5 9.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4).

4.c4 d4 5.e3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 d4).

4.e3 Nd7 5.Nf3 Ngf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Nbd7).

4.e3 Nd7 5.Nf3 Ngf6 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3).

4.e3 Nf6 5.Nf3 Nbd7 6.c4 dc4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3 dc4).

4.Bd4 Nc6 5.Be3 Bc5 6.Bc5 Qc5 7.Nc3 Nf6 8.Nf3 b6 9.e3 0-0 10.Bd3 Nb4 11.Ne4 (11.Be2 Bb7=+) 11...Qe7 (better 11...Ne4 12.Be4 f5–/+) 12.c3?? (better 12.Nc3=+) 12...Nd3–+ 13.Ke2 Nc5 (better 13...Ne4 14.Qa4 d5–+) 14.Nf6 (14.Nc5 Qc5 15.Ke1 Bb7–+) 14...Qf6 15.Re1 (15.Kf1 Ba6 16.Kg1 d6–+) 15...Bb7 (better 15...Ba6 16.d3 Bd3 17.Qd3 Nd3 18.Kd3–+) 16.Kf1 (16.d3 Qc3 17.Qd2 Qf6–+) 16...Nd3 17.Nd4 (17.Qe2 Ne1 18.Ne1 d6–+) 17...Ne1 (17...Qf2) 18.Qe1–+ Qg6 19.f3 e5 20.Ne2 f5 21.Ng3 (21.Qg3 Qd6–+) 21...f4 22.Ne4 (22.ef4 ef4 23.Nh1–+) 22...Be4 23.fe4 (23.ef4 Rf4 24.Qg3 Qd6–+) 23...Qe4 (better 23...fe3 24.Kg1 Rf2 25.Qf2 ef2 26.Kf2 Qe4 27.Kg1–+) 24.ef4 Qe1 25.Re1 ef4 (25...Rf4 26.Ke2–+) 26.Re7 d5 27.Rd7 f3 28.g3 (28.Kf2 fg2 29.Kg2 Rfd8–+) 28...f2 (28...Rae8 29.Rb7 f2 30.Rg7 Kg7 31.g4 Re1 32.Kg2 f1Q 33.Kg3 Qf2 34.Kh3 Rf3) 29.Rd5 (29.Re7 d4 30.Re2–+) 29...Rae8 30.g4 (30.Rf5 Rf5 31.g4 Re1 32.Kg2 f1Q 33.Kg3 Qf2 34.Kh3 Rf3) 30...Re1 31.Kg2 f1Q 32.Kg3 Qf3 (32...Qf2 33.Kh3 Rf3) 33.Kh4 Qd5 (33...Qd5 34.c4 Qd8 35.Kh3 Qg5 36.c5 Rf3 37.Kg2 Qg4; 33...Qf2 34.Kg5 Qf6 35.Kh5 Qh6) 0–1. aravind555 (1770) – p12d5a (1825), lichess.org, 2020.

4.Bd4 Nc6= 5.Be3 Bc5 6.Bf4 Bd4 7.c3=+ Bf6 8.e3 d5 9.Ne2 Qb6 10.d4= Bd7 11.Nd2 Qd8 12.Nb3 b6 13.Ng3 g5 14.Bd6+= Qc8 15.Nh5 Nce7 16.Nf6 Nf6 17.Be5 Neg8 18.Nd2 Qc3 19.Rc1 Qb2 20.Rc7 h5 21.Be2 Rh6 22.0-0 Ne7 23.Ba6+/– Qa2 24.Bb7 Rd8 25.Bf6 Rf6 26.Qh5 Rg6 27.Nf3+– f6 28.Qh8 Rg8 29.Qf6 Nf5 30.Ne5 Rf8 31.Qg6 Ke7 32.Qg5 Kd6+– 33.Rcc1 Bb5 34.Ra1 Qc2 35.Rfc1 Qe4 36.Ra7 Rg8 37.Nf7 Kd7 38.Bd5 (38.Bd5 Ke8 39.Qg8#) 1–0. pinecrest1981 – yxcvb1000, Live Game Caissa's Web, 2005.

4.e3 Qc5 5.Ba3 Qb6 6.Bf8 Kf8 7.Nf3 Nf6 8.Be2 Nc6 9.0-0 d6 10.c4 e5 11.Nc3 Bg4 12.Rb1 Qc7 13.Nb5 (13.d4 Bf5 14.Rb2 Re8+–) 13...Qd7+= 14.Ne5?? (better 14.d4+=) 14...Ne5 15.Bg4 Neg4 (15...Qg4?! 16.Nd6 Qe6 17.c5=) 16.f4 a6 17.Nd4 Nh6 (17...d5 18.h3 Nh6 19.Qf3–+) 18.Rf3 (18.Qf3 d5–/+) 18...Rb8 (18...d5 19.cd5 b5 20.Qc2–+) 19.Rg3 (19.Qc2 Rc8–/+) 19...d5 20.cd5 White launches an attack 20...Qd5 21.Rg5 Qe4 (21...Qa2 22.Qc1 Ne4 23.Rb7 Re8=+) 22.Re5= Qg6 23.Rg5 Qe4 (23...Qd3 24.Qc1 Re8 25.Rb7+=) 24.Re5 Qg6 25.Rg5 Qe4 (25...Qd3 26.Qc1 Re8 27.Rb7+=) 26.Re5 Qg6 27.Rg5 Qe4 (27...Qd3 28.Qc1 Re8 29.Rb7=) 28.Re5 Qd3 29.Qc1 g6?? (better 29...Ra8=) 30.Rb3+– Qb3 31.ab3 Kg7 32.Re7 Nd5 (32...Rhc8 33.Ne6 Kg8+–) 33.Qb2 Ne7 (33...Kf8 34.Nc6! bc6 35.Qh8 Ng8+–) 34.Ne6 Kg8 35.Qg7 1–0. aravind555 (1655) – snipermove (1670), lichess.org, 2019.

4.e3 Qc5 5.Nc3 a6 6.Nf3 Nc6 7.Bd3 b5 8.a4 Bb7 (8...b4 9.Ne4 Qd5 10.Neg5+=) 9.Ne4 Qe7 10.ab5 ab5?? (better is 10...Nb4 11.ba6 Nd3 12.cd3 Ba6+–) 11.Ra8+– (11.Bb5?! Ra1 12.Ba1 Nb4+/–) 11...Ba8 12.Qa1 Bb7 (12...Na7 13.Qa7 Be4 14.Be4+–) 13.Bg7 (13.Bb5 Nb4 14.Qa7 Nc2 15.Kf1 Be4+–) 13...f6 (13...f5 14.Nf6 (worse is 14.Bh8 fe4 15.Be4 Nb4+–) 14...Nf6 15.Bf6+– (15.Bh8?! Bg7 16.Bg7 Qg7+–)) 14.Bh8 Bg7 (14...f5 15.Nf6 Nf6 16.Bf6 Qc5+–) 15.Bg7 Qg7 16.Nd6 (16.Nd6 Ke7 17.Nb7+–) 1–0. usingprogram – joule, internet, 2011.

4.cb6 ab6 5.Bc1 Ba6 6.Nc3 Bb4 7.Rb1 Qh4 (7...Bc3 8.dc3 Nc6+=) 8.Rb4?? (better 8.Nf3 Qe7 9.Bb2+/-) 8...Qb4=+ 9.Nf3 Qb1?? (9...d5 10.a3 Qd6 11.e4 Bf1 12.Rf1-/+) 10.g3 (10.Nb1 Ne7+-) 10...Ra7?? (better 10...Qa1=+) 11.Nb1+- Be2 (11...Ne7+-) 12.Nc3 (better 12.Qe2 Ne7 13.Nc3+-) 12...Bd1 13.Kd1 (13.Nd1?! Ra2 14.Bb2 Nf6+/-) 13...Rc7? (better 13...Nf6+-) 14.Nb5 Rc5 (14...Rc6 15.Ne5+-) 15.Nd6 (15.d4 Rh5 16.g4 Rb5 17.Bb5 Nf6+-) 15...Ke7 16.Ne4 (better 16.Nb7 Nf6 17.Nc5 bc5 18.d4+-) 16...Re5?? (better 16...Ra5 17.Bb2 f6+-) 17.Ba3 (better 17.Ne5 Kf8 18.Ba3 Ne7+-) 17...d6 (17...Rc5 18.d4 d6 19.dc5 dc5+-) 18.Ne5 f6 19.Bd6 Kd8 20.Bb5 (20.Bb5 fe5 21.Be5+-) 1-0. FeegLood (2750) – Nathrot, Time forfeit, lichess.org, 2016.

4.cb6 ab6 5.Nc3 Nc6 6.e3 Ba6 7.Ba6 Ra6 8.Qe2 Nf6?? (better 8...Nb4+/-) 9.Qa6+- Be7 (9...Bc5+-) 10.Na4 (10.a3 e5+-) 10...0-0 (10...Nb4 11.Qb6 Qa8 12.Rb1 Nc2 13.Kd1 Qa4 14.Bf6 Bf6 15.Qb3+-) 11.Qb6 (11.a3 Ne4+-) 11...Qe8 (11...Qa8 12.Bf6 Bf6 13.Nc3+-) 12.Qb3 (12.Bf6 Bf6 13.c3 Qa8+-) 12...Nd5 (12...Qa8 13.Nb6 Qa6 14.Nc4+-) 13.c3 (13.c4 Nf6+-) 13...f5 (13...Qa8 14.Nf3+-) 14.d4 (better 14.c4!? Nf6+-) 14...f4 (14...Qg6 15.Ne2 Qg2 16.Rg1 Qh2 17.Bc1+-) 15.e4 Nf6 (15...Qg6 16.ed5 Qg2 17.dc6 Qh1 18.Kd2 Qc6 19.c4+-) 16.f3 Qh5 17.Ne2 Qh4 18.Kf1 Nh5 (18...Rb8 19.Qc4+-) 19.Nc5 (19.d5 Ne5 20.c4 Bf6+-) 19...Ng3 (19...Bc5 20.dc5 Ng3 21.Ng3 fg3 22.Qc2+-) 20.Ng3 fg3 (20...Rb8 21.Qc4 Rb2 22.Nd3+-) 21.h3 (21.Nd7 Qe4 22.Qd1 Rf7 23.hg3 Bd6+-) 21...Qf4 (21...Bc5 22.dc5 Qe4+-) 22.Bc1 (22.Nd7 Qd2 23.Qe6 Kh8 24.Qg8 Rg8 25.c4 Qf2) 22...Qc7 23.Be3 Nd8 (23...Bc5 24.dc5 Qa5 25.Kg1+-) 24.Rb1 (better 24.Qb5 d6 25.Qd7 Qa5 26.Qe7 Qc3+-) 24...Qc6 (24...Bc5 25.dc5 Nc6 26.Qd1+-) 25.Qb5 (better 25.d5 Qd6+-) 25...Qc7 (25...Bc5 26.Qc6 Nc6 27.dc5+-) 26.Na6 (better 26.Qd7 Qd6+-) 26...Qc8 (26...Qc3 27.Qb3 Qa5+-) 27.Qb8 (better 27.c4!? Nc6+-) 27...Qc3 (27...Qa6 28.Ke1 Qa2+-) 28.Qb3 Qc8 29.Nb4 (29.Nc5!? Bc5 30.dc5 Qa6 31.Kg1 Qe2+-) 29...Bb4 30.Qb4 Qa6 31.Kg1 Qa2 32.h4 Nc6 33.Rh3 (better 33.Qe1 Ra8 34.Rh3+-) 33...Nb4-+ 34.Re1 (34.Rf1 Nc2 35.Bg5-+) 34...Nd3 35.Rf1 Qe2 36.Bf4 (36.Rg3 Qe3 37.Kh2 Rf4-+) 36...Nf4 37.Rg3 Qe3 (37...Qe3 38.Kh2 Ne2-+) 0-1. ClayPigeons (2110) - Smowheer (2200), Rated Bullet game, lichess.org, 2020.

4.cb6 ab6 5.e3 Ba6 (5...Nc6 6.Nf3+=) 6.Ba6+/– Na6 7.Nf3 Nb4 (7...Nf6 8.Nc3+/–) 8.Nc3 Nf6 9.0-0 Nfd5 (9...Be7!?+/–) 10.Nd5+– ed5 (10...Nd5 11.e4 Nf6 12.e5+–) 11.Re1 Na2?! (11...Bd6 12.a3 Nc6 13.Bg7 Rg8+–) 12.e4 de4 (12...d4+–) 13.Re4 Be7 14.Bg7 Rg8 (14...d5 15.Re1 (15.Bh8?! de4 16.Nd4 Nb4+–) 15...Rg8 16.Bf6+–) 15.Bf6 Nc3 16.Re7 Kf8 17.dc3 Rg6 18.Rf7! Kf7 19.Bd8 Rd8 20.Ne5 (20.Ne5 Kg7 21.Ng6 h6 22.Qd4 Kg6 23.Qb6 Kh7 24.Qd8 Kg7 25.Qd7 Kf6 26.Qd6 Kf5 27.Ra5 Kg4 28.Qd4) 1–0. pierre – apoxiris, internet, 2009.

4.cb6 ab6 5.e4 Nc6+/–.

4.cb6 Qb6 5.Qc1 Bb7 6.e3 f6 (6...Nc6 7.Nc3+/–) 7.Bd4 (better is 7.Nc3+/–) 7...e5?? (better is 7...Qc7+=) 8.Bb6+– ab6 0–1. GuestVLLC – GuestMDHT, freechess.org, 2016.

4.cb6 Qb6 5.Bc1+=.

4.cb6+/– Qb6 5.Bc3 Nc6 6.e3 (6.Nf3 d5 7.e3 Rb8+/–) 6...a5 (6...Qc7 7.Nf3+/–) 7.Na3 (7.Nf3 Rb8+/–) 7...Ba6 8.Rb1 Qa7 (8...Nb4!?+/–) 9.Ba6 (9.Nb5 Bb5 10.Bb5 Qc7+–) 9...Qa6 10.Nb5 Qc8?? (better is 10...Rc8+–) 11.Bg7!! Nge7 (11...Bg7 Theme: Deflection from d6 12.Nd6 A double attack) 12.Nd6 (12.Nd6 Kd8 13.Nc8 Bg7 14.Nd6+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

4.cb6 Qb6 5.Bc3 Nf6 6.e3 Bb4 7.Nf3 Bc3 8.Nc3 0-0 9.Rb1 Qa5 10.Bc4 (10.Nd4 d5+/-) 10...Nc6 11.0-0 Ba6 12.Ba6 Qa6 13.Ne2 (13.e4!?+/-) 13...Rab8 (13...Qa2 14.d3=) 14.Ned4 Nb4 (14...Nd4 15.Nd4 Ne4 16.Rb8 Rb8 17.f3+=) 15.a3 Nbd5 16.Ra1 (16.Rb8 Rb8 17.Qa1 d6+/-) 16...Ne4 (16...d6 17.Re1+=) 17.Ne5 (better 17.c4 Ndf6 18.d3+/-) 17...d6? (better 17...Qd6 18.Nd3 Rfc8+=) 18.Nd7+- Rb2 (18...Ndf6 19.Nf8 Kf8 20.c4+-) 19.Nf8 Kf8 20.Qc1 Qb7 (20...Rb6 21.c4 Ndf6 22.Qc2+-) 21.Rb1 (better 21.Nb3 Rb3 22.cb3 f5+-) 21...Rb1 22.Qb1 Qb1 23.Rb1 Nd2 24.Rb7 a5 25.Nb5 (better 25.Nc6!? Ke8+-) 25...Nc4 26.a4 g6 27.e4 Nc3?? (better 27...Nb4+-) 28.Rc7 (better 28.Nc3!? h5+-) 28...Nb5 29.ab5 (29.Rc4?! Na3 30.Rc7 Ke8+-) 29...d5 (29...Nb6 30.Rc6 Nd7 31.b6 Nb6 32.Rb6+-) 30.ed5 (30.Rc4 dc4 31.b6 a4+-) 30...ed5 (30...Nb6 31.d6 Ke8+-) 31.Rc5 (better 31.Rc4 dc4 32.b6 Ke7+-) 31...a4 (31...Ke8 32.Rd5 h6 33.Rc5+-) 32.Rd5 (better 32.Rc4 dc4 33.b6+-) 32...a3 33.Rd8 (33.Rd7 Ke8 34.Rc7 Nd6+-) 33...Kg7 (33...Ke7 34.Rc8 Nd6 35.Rc7 Kd8+-) 34.Ra8 Kf6 (34...a2 35.Ra2 Kf8 36.Ra6+-) 35.b6! Nb6 36.Ra6 a2 37.Rb6 Ke5 38.Ra6 Kd5 39.Ra2 Kc4 (39...h5 40.Ra5 Kd6 41.Ra7+-) 40.Ra3 (40.Ra7!? f6+-) 40...Kb4 (40...Kd5 41.Rd3 Kc6 42.g4+-) 41.Rd3 1-0. ClayPigeons (2160) - salparadise27 (2145), Rated Bullet game, lichess.org, 2021.

4.d4 Be7 5.d5 Nf6 6.de6 de6 7.Qd8 Bd8 8.Nc3 0-0 9.0-0-0 Nc6 10.e3 Bb6 11.Bd3 Ba5 (11...Ng4 12.Nh3=+) 12.Nf3 a6 13.Ne4 Ne4 14.Be4 e5 (14...Bc7 15.c4+=) 15.Kb1 (15.Bc6 bc6 16.Ne5 Bb7+-) 15...Be6 (15...f6 16.a3=) 16.Bd5 (better 16.Ne5 Ne5 17.Be5+/-) 16...f6?? (better 16...Bd5 17.Rd5 f6=) 17.Be6+- Kh8 18.Nh4 (18.Rd7 Rfe8 19.Bf5 Re7+-) 18...Rae8 (18...Rfe8 19.Bd7 Red8 20.c4+-) 19.Bb3 Rc8 20.Nf5 g6 21.Nd6 Kg7 (21...Rc7 22.a3+-) 22.h4 (22.Nc8!? Rc8 23.Rd7 Kh6 24.Rb7 Rc7 25.Rc7 Bc7+-) 22...Rcd8 (22...Rc7 23.h5 gh5 24.Bd5+-) 23.h5 (23.Nb7 Rd1 24.Rd1 Rc8+-) 23...g5 (23...g