3.a3 Qb4?? 4.ab4+– Nc6 (4...f6 5.Nc3 c6 6.b5+–) 5.e3 (5.b5!? Nd4+–) 5...Nb4 (5...Bb4 6.Bb5 Nge7 7.Qh5+–) 6.Nf3 (better is 6.Be5 d6 7.Bc3 d5+–) 6...Nc2 (6...d6+–) 7.Qc2 Bd6 8.Bc4 Nf6 9.0-0 Ng4 10.Be2 (better is 10.Bf7 Kf7 11.Qc4 Ke8 12.Qg4 g6+–) 10...Nf2 11.Rf2 Bb4 12.d4 (better is 12.Ne5 Rf8+–) 12...ed4 13.Bd4 0-0 14.Ra7 (14.Ng5 g6 15.Qc4 d5 16.Qc7 Bf5 17.Qe5 f6 18.Qc7 Bd7 19.Qd7 Be7 20.Qe7 Rfe8 21.Qh7 Kf8 22.Rf6) 14...Ra7 15.Ba7 1–0. Fournier,Frederic (1905) – kike20, Active Blind, 2008.

3.a3 Qd6 4.Nf3 Nc6 5.e3 Be7? (5...a6 6.Nc3+=) 6.Be2?? (better is 6.b5 Nd8 7.Be5+–) 6...Bf6 7.c4 (better is 7.Nc3!? Bd8 8.b5+/–) 7...e4= 8.c5 Qe7 9.Nd4 Nd4 10.ed4 e3?? (better is 10...d5=) 11.de3+– Qe4 12.Bf3 Qg6 13.0-0 Ne7 14.Nd2 0-0 15.e4 (15.Be4!? Qg5+–) 15...Bg5 16.Nc4 c6 (16...d6 17.cd6 cd6 18.Bc1+–) 17.Ne5 (17.Qa4 Bf4+–) 17...Qh6 18.Ng4 Qg6 19.Ne5 Qh6 20.g3 (better is 20.Bc1+–) 20...Ng6?? (better is 20...d5+/–) 21.Ng4+– White prepares e5 21...Qh3 22.Bg2 Qh5 (22...Qg2 23.Kg2 f5 24.f4+–) 23.Nf6!! gf6 (23...Bf6 24.Qh5 Discovered attack; 23...gf6 24.Qh5 Discovered attack) 24.Qh5 b5 25.e5 (25.f4!? Bf4 26.gf4 a5+–) 25...Bb7 26.h4 Bf4 27.gf4 Nf4 28.Qg4 Ng6 29.h5 f5 30.Qf5 Ne7 31.Qg5 Kh8 32.Qe7 Rg8 33.Qf6 (33.e6 d5 34.Qf6 Rg7 35.h6 Rag8 36.ef7 Bc8 37.fg8Q Kg8 38.Qg7) 33...Rg7 34.h6 Rag8 35.hg7 Rg7 36.d5! cd5 (36...cd5 37.e6 Mate attack) 37.Bd4 Bc8 38.Qd8 Rg8 39.e6 f6 40.Bf6 1–0. GuestRHYY – LesJ, freechess.org, 2017.

3.a3 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 Qe7).

3.a3 Qg5 4.Nf3+/– Qf6 (4...Qe7 5.Be5 Nc6 6.Bb2+/–) 5.Be5 Qe7 (better is 5...Qd8!?+/–) 6.Bc7+– Na6 (6...d6 7.Bb8 Rb8 8.e3+–) 7.Bf4 Nb4? (7...Nf6+–) 8.ab4 Qb4 9.e3 Qc5 10.d4 Qe7 (10...Qb4 11.Nbd2+–) 11.Bd3 (11.Na3 d6+–) 11...Nf6 12.0-0 Nd5 (12...d6 13.Bg5+–) 13.Re1 (13.Ra5 Nf4 14.ef4 Kd8+–) 13...b5 (13...Qd8 14.c4 Nf6 15.e4+–) 14.Bb5 a6 15.Bc4 Nb6 16.Bd3 a5 (16...Qe6 17.Ng5 Qc6 18.Nh7+–) 17.c4 d6 18.Nbd2 (18.Nc3 Bg4+–) 18...Bg4 (18...Qd8 19.e4+–) 19.Qb3 Rb8 (19...Nd7 20.Ng5+–) 20.c5! Nd7 (20...dc5 21.Bb8) 21.Qa2 Be6 (21...Qe6 22.Qa5 Qd5 23.e4+–) 22.Qa5 Qd8 23.Ne4 d5 (23...Qa5 24.Ra5 Rd8 25.Nd6 Bd6 26.Bd6+–) 24.Bc7 (24.Bb8 Qa5 25.Ra5 de4 26.Be4 Bc5+–) 24...Qc8 25.Ba6 Rg8 (25...de4 26.Bc8 Rc8+–) 26.Bc8 Rc8 27.Neg5 (27...Bc5 28.dc5+–) 1–0. raddykko – sport_angel, GameColony.com, 2002.

3.a3 Qh4 4.Nf3 Qf6 (4...Qe7 5.Ne5 d5 6.e3+/–) 5.Be5 Qa6 (better is 5...Qd8!?+/–) 6.Bc7+– Nc6? (6...Qc6 7.Bf4 Bd6+–) 7.e3 b5 8.c3 (8.Nc3 Qb7 9.Nb5 a6 10.Nd6 Bd6 11.Bd6 Nce7+–) 8...Bb7 (8...Qb7 9.Bf4+–) 9.a4 Rc8 (9...Nce7 10.Na3 Qe6 11.Nb5 Nd5+–) 10.Bb5 Qb5 (10...Rc7 11.Ba6 Ba6 12.b5+–) 11.ab5 Nb4 12.cb4 (12.Bg3!? Nd3 13.Ke2 Be4+–) 12...Rc7 13.0-0 Bb4 (13...Nf6 14.Ne5 Bd6 15.Ra7 Bg2 16.Rc7 Bc7 17.Kg2 Be5 18.d4+–) 14.d4 (14.Qa4 Bc5+–) 14...Ne7 15.Ra7 0-0 16.Qa4 Bd6 17.Nbd2 (17.Rb7 Rb7 18.Qa6 Bh2 19.Kh2 Rfb8+–) 17...Nd5 (17...Nc8 18.Ra5+–) 18.Nc4 Bb4 (18...Nc3 19.Qb3 Bf3 20.Rc7 Bc7 21.gf3+–) 19.b6 (19.Na5!? Ba5 20.Qa5 Rb8+–) 19...Bc6 20.Qa6 Ra8 21.Ra8 Ba8 22.Qa8 Bf8 23.Qd5 Rc8 24.b7 Rb8 25.Nb6 Rd8 26.Nd7 Bb4 27.b8Q (27.Ng5 Rf8 28.b8Q Kh8 29.Nf7 Kg8 30.Nd6 Kh8 31.Qf8) 27...Rb8 (27...Kh8 28.Qd8 Bf8 29.Qf8) 28.Nb8 1–0. Trkn – playa697, itsyourturn.com, 2000.

3.Ba3 Qe6 4.e3 Nc6 5.c3 a5 (better 5...Nf6=+) 6.Qb3? (better 6.b5!? Ba3 7.Na3=) 6...ab4-/+ 7.Bb4?? (7.Qe6 de6 8.Bb2 Nf6-/+) 7...Nb4 (better 7...Qb3 8.ab3 Ra1-+) 8.Qe6-/+ de6 9.cb4 Bb4 10.Bb5 (10.Nc3 Nf6-+) 10...c6 11.Bc4 Ne7 (11...Nf6 12.Ne2-+) 12.Nf3 Ng6 13.Ng5 (13.Nc3 b5 14.Bb3 Ba3-+) 13...0-0 (13...Be7 14.Ne4-+) 14.0-0 (14.Bd3 Rd8 15.Bg6 hg6-+) 14...h6 15.a3?? (better 15.Ne4-+) 15...Ba3 (better 15...hg5 16.Rc1 Rd8-+) 16.Ra3? (better 16.Bd3!? hg5 17.Bg6 fg6 18.Na3-/+) 16...Ra3-+ 17.Na3 hg5 18.Rc1 b5 19.Be2 Bd7 (19...Bb7 20.Bf3-+) 20.Bh5 (20.Nc2 Rc8-+) 20...Ra8 21.Nc2 Ne7 22.Kf1 (22.d4 ed4 23.ed4 Nd5-+) 22...g6 (22...e4 23.Be2-+) 23.Be2 Nd5 24.Ke1 (24.Bf3 c5-+) 24...Ra2 (24...c5 25.e4 Nf4 26.Ne3-+) 25.e4 (25.d4 ed4 26.Nd4 Nb4-+) 25...Nf4 26.Bf3? (26.Bf1-+) 26...Nd3 27.Kd1 Nc1 28.Kc1 Bc8 (28...c5 29.Kb1 Ra4 30.d3-+) 29.Kb1 Ba6 (29...Ra4 30.d3-+) 30.Nb4?? (better 30.Ka2 c5 31.Be2+/-) 30...Ra4-+ (30...Rd2?! 31.Na6 Rf2 32.h3-+) 31.Nc6 b4 (better 31...g4 32.Bg4 Bb7 33.Ne5 Be4 34.Kb2 Bg2-+) 32.Ne5 b3 33.Bd1?? (33.Kb2 Ra2 34.Kb3 Rd2-+) 33...Ra5 (33...Re4 34.Ng4 Re1 35.Ne3-+) 34.Bb3?? (34.d4 Ra4 35.Bb3 Rd4 36.Bc2-+) 34...Re5 35.Kc2 (35.f3 Bf1 36.g3 g4 37.fg4 Re4-+) 35...Re4 36.d3 (36.Kd1 Re2 37.Bc2 Rf2-+) 36...Rf4 (better 36...Re2 37.Kc3 Rf2 38.g3-+) 37.f3 Rf5 (better 37...g4!? 38.fg4 Rg4 39.g3-+) 38.Kc3 Rb5 39.Bc4 Rc5 0-1. chessovolution (1665) - ilovechess_123 (1660), Rated Bullet game, lichess.org, 2021.

3.Ba3 Nf6 4.b5 d6 5.Nf3 =+.

3.Na3 Qb4-/+ 4.Rc1?? (better 4.Qc1 Nf6 5.e3-/+) 4...Qb2-+ 5.d3 (5.Nc4 Qd4 6.e3-+) 5...Qa3 (better 5...Ba3 6.Nf3 Qc1 7.Qc1 Bc1 8.Ne5-+) 6.Qd2 (6.c3 Qa2 7.Nf3 Qe6-+) 6...Bb4 (better 6...Qa2!? 7.Nf3 Nc6 8.e3-+) 7.c3 Ba5 8.Qg5 (8.e3 Nf6-+) 8...Bc3 9.Rc3 Qc3 10.Kd1 Qa1 11.Kd2 Qf1 (better 11...Ne7 12.Nf3 Qa2 13.Ke1 Qb1 14.Kd2-+) 12.Nf3 (12.Qg7 d5 13.Qh8 Kf8 14.Qe5 Qg2-+) 12...Qh1 13.Qd8 Kd8 14.Ke3 Qg2 (better 14...Qc1 15.Nd2-+) 15.h4 Nf6 16.Kd2 Qf2 17.Ne5 Qf4 (17...Qf4 18.e3 Qe5 19.e4 Qb2 20.Ke3 Ng4 21.Kf4 Qf2 22.Kg5 Nf6 23.d4 h6) 0-1. karinaMonfil - galina_slog, Rated Classical game, lichess.org, 2014.

3.a4 Qb4 4.Ba3 Qd4 (4...Qa5 5.Bf8 Kf8 6.e4-/+) 5.Bf8 (better 5.Nc3 Ba3 6.Ra3=+) 5...Qa1?? (better 5...Kf8 6.Nc3 Nf6-/+) 6.Nc3 (better 6.Bg7 d6 7.Bh8+-) 6...Qd1-+ 7.Nd1 (7.Kd1 Kf8 8.f4 ef4 9.Nh3-+) 7...Ne7 (better 7...Kf8 8.Nf3 d6-+) 8.Bg7-/+ Rg8 9.Be5 d6 10.Bc3 (10.Bb2 Na6-/+) 10...Bg4 (10...Nd7 11.a5-/+) 11.Ne3 Bh5 (11...Be6!?-/+) 12.g3= c6 (12...Nd7 13.Nh3=) 13.Bg2 d5 (13...Nd7 14.Nh3=) 14.Nf3 (14.Nh3 Bg6+=) 14...Nd7= 15.0-0 (better 15.a5=) 15...Nf6?? (better 15...Nc5=) 16.Bf6+- Ng6 (16...Rg6 17.Bd4+-) 17.Ne5 (better 17.g4 Nf4 18.gh5 Ne2 19.Kh1 Nf4+-) 17...Ne5 18.Be5 Kd7 (18...Be2 19.Re1 Bg4 20.Rb1+-) 19.Bh3 Ke8 (19...Kd8 20.Rb1 b6 21.Nf5+-) 20.f3 d4 (20...b6 21.Rc1+-) 21.Ng4 (better 21.Bd4 Rd8 22.Bc3+-) 21...f5 (21...Bg4 22.fg4 Rg6+-) 22.Nf6 Kf7 23.Nh5 Rae8 (23...Rg5 24.Nf4 Rd8 25.Rb1+-) 24.Bd4 Rg6 (24...Re2 25.Be3+-) 25.Nf4 Rd6 26.Bc3 b5 (26...Rf6 27.a5+-) 27.ab5 cb5 28.Bf5 a5 29.Ba5 Re5 30.Bd3 (30.Bc7 Rf5 31.Bd6 Rf6+-) 30...Re8 31.Rb1 Ra6 32.Rb5 Rea8 33.Rf5 (33.Rb7 Kf8 34.Ba6 Ra6+-) 33...Ke7 34.Ba6 Ra6 35.Bb4 Ke8 36.Ra5 (36.Rf8 Kd7 37.Rf7 Kc8 38.Rh7 Ra2+-) 36...Rc6 37.c3 Kd7 38.h4 (38.Ra7!? Kc8 39.Rh7 Ra6+-) 38...h6 39.h5 Rd6 40.d4 (40.d4 Rb6 41.e4+-) 1-0. invictus31 (1660) - DientesDDS (1675), lichess.org, 2020.

3.a4 c5 4.bc5 Qc5 5.Ba3 (5.d4 Qb6 6.Ra2 Qa5 7.Bc3 Qd5=) 5...Qc7 6.Bf8 Kf8 7.e4 Nf6 8.Nc3 Nc6 (8...Kg8 9.Qf3=) 9.Rb1 (9.Nge2 d6=) 9...Rb8 (9...d6 10.Bb5=) 10.Nf3 b6 (10...d6 11.Qe2=) 11.Be2 (11.Nb5 Qd8=) 11...Nd4 (11...Bb7!?=) 12.Nd4+/– ed4 13.Nb5 Qf4 (13...Qe5 14.Na7 Bb7 15.0-0+=) 14.d3 (< 14.Na7 Ne4 15.0-0 Nd2=+ (< 15...Qd2 16.Nc8 Qd1 17.Rfd1 Rc8 18.Ba6+=)) 14...d5 15.ed5 (15.Nd4 de4 16.0-0 Bb7=) 15...Bg4 (15...a6 16.Na7 Nd5 17.Nc6–/+) 16.g3 (16.Qd2 Qe5 17.f3 Bd7 18.Qb4 Qe7 19.Qd4 Re8+/–) 16...Qf5 (16...Qe5 17.f4 Qd5–/+) 17.Nd4?? (better is 17.Bg4 Ng4 18.0-0+/–) 17...Qd5–/+ 18.Nf3 (better is 18.f3 Qd4 19.fg4–/+) 18...Qa5 (18...Re8 19.0-0 Re2 20.Qe2 Qf3 21.Qf3 Bf3=) 19.Qd2+= Qa4 20.0-0 Qc6?? (better is 20...Re8=) 21.Ne5+– Qe6 (21...Qd6 22.Qf4 (22.Bg4?! Qe5 23.Rfe1 Qd6+/–) 22...Rd8 23.Bg4+– (23.Ng4?! Qf4 24.gf4 Nd5+–)) 22.Ng4 Ng4 23.Qb4 Ke8 (23...Kg8 24.Bg4 Qf6+–) 24.Bg4 Qa2 (24...Qf6 25.Rfe1 Kd8+–) 25.Rfe1 Kd8 26.Qe7 1–0. 1805DYDIDIDY – Fuffy, mySchach.de, 2005.

3.a4 Qe6 4.Nf3= Bb4 (4...f6!?=) 5.Be5+= (5.Ne5?! Nf6=) 5...d6?? (better is 5...Nf6 6.Bc7 Nc6+=) 6.Bg7+– 1–0. Wall,Bill – Babeolishors, internet, 2000.

3.b5 Kd8 4.e3 Nf6 5.Nf3 d6 6.d4 e4 7.Nfd2 Bg4 8.Be2 Be2 9.Qe2 Nbd7 10.Nc3 d5 11.a4 Kc8 12.0-0 h5 13.h4 Ng4 14.g3 Ndf6 15.f3 ef3 16.Qf3? (16.Rf3 Qe6) 16...Qe3 17.Qe3 Ne3 18.Rf3? (18.Rf2 Nc2) 18...Nc2 19.Rc1 Nd4 20.Rd3 Bc5 21.Nd5 Ne2 22.Kh2 Nc1 23.Bc1 Rd8 24.Nf4 Rd3 25.Nd3 Be3 26.Ne5 Ng4 27.Ng4 hg4 28.Nb3 Bc1 29.Nc1 a6 30.ba6 Ra6 31.Nd3 Ra4 32.Ne5 b5 0–1. Guest153461 – Wall,Bill, playchess.com, 2012.

3.b5 f6 4.e3 (4.Nc3 Nh6=) 4...d6 (4...Qe6 5.d4=) 5.Nf3 Bg4 (5...Be6 6.d4=) 6.Be2 Nd7 7.d4 (7.0-0 0-0-0=) 7...ed4 (7...e4 8.Nfd2 Be2 9.Qe2=) 8.Nd4 (8.Bd4 Nh6+=) 8...Be2= 9.Qe2 Nh6 (9...0-0-0 10.0-0+=) 10.0-0 Ne5 (10...0-0-0 11.Nc3+=) 11.h3 (11.Nc3 Qf7+=) 11...Qd7 (11...0-0-0 12.Rd1=) 12.a4 (12.f4 Ng6+=) 12...Be7 (12...d5 13.e4 de4 14.Qe4+=) 13.Nf3 (13.a5 a6+=) 13...0-0= 14.Ne5 (14.Rd1 Qe6=) 14...de5 (14...fe5 15.Qd3 Qe6 16.e4+=) 15.Nc3= Qe6 (15...Rad8 16.Qc4 Nf7 17.Rfd1+=) 16.Ba3 (16.Qf3 c6=) 16...Ba3 17.Ra3 Qd6 (17...a6 18.Rd1=) 18.Rb3 Nf7 (18...Rad8 19.Qf3+=) 19.Rd1+= Qe6 20.Nd5 Rac8 21.Rbd3 c6 22.bc6 (22.Qg4 Rfe8 23.Qe6 Re6=) 22...Rc6 23.c3 Rfc8 24.Qb2 (24.e4 Rc4+=) 24...b6 (24...e4 25.R3d2 b6 26.Qb4=) 25.Qa3 (25.Qb4 Rc5+=) 25...Rc5= 26.e4 h6 27.f3 (27.Qb4 Rd8+=) 27...Kh8 28.Qa1 (28.R1d2 Ng5=) 28...Ra5 29.R1d2 (29.Qa2 Qe8=) 29...Rc4 Attacking the isolated pawn on a4 30.Qa3 (better is 30.Nb4+=) 30...Rac5?? (better is 30...Raa4 31.Qf8 Kh7+=) 31.Ne3+– Kh7 32.Nc4 Qc4 33.Rd7 a6 (33...a5 34.Qb2+–) 34.Rb7 Ng5 35.Rb6 Ra5 36.Qb4 (36.Rd7 Kg6+–) 36...Ra4 37.Qc4 Rc4 38.Ra6 (better is 38.h4!? Nf7 39.Rd7 Nh8+–) 38...Rc3 39.Rd7 Rc1 40.Kh2 Rc2 (40...Kg6 41.h4 Nh7 42.Raa7+–) 41.Kg3 (better is 41.Rf6! Rc1 42.h4+–) 41...Rc3 42.Ra4 (42.Kh4 Kg6+–) 42...Kg6 43.Re7 Rc6 44.h4 Ne6 45.Raa7 (45.Kg4 h5 46.Kg3 f5+–) 45...Rd6 (45...Kh5 46.Reb7+–) 46.Kh2 (46.Kg4 h5 47.Kg3 Rc6+–) 46...h5 (46...Kh5 47.g3+–) 47.g3 Kh6 48.Re8 (48.Kh3 Rc6+–) 48...Kg6 (48...Rd2 49.Kh3 Rd6 50.Rea8+–) 49.Rae7 (49.Kg2 Rd2 50.Kf1 Rd6+–) 49...Nd4 50.Kg2 Nc6 51.Rc7 Rd2 (51...Nd4 52.f4 Nb5 53.Rb7 Rd2 54.Kf3+/–) 52.Kf1 (52.Kh3 Nd4 53.f4+=) 52...Rd6? (52...Rd1 53.Kf2 Rd8 54.Rd8 (54.Rc6?! Re8 55.Ke3 Ra8=) 54...Nd8 55.f4+–) 53.Rf8 (53.Rg8 Nd4 54.Rgg7 Kh6 55.Rh7 Kg6 56.Rcg7) 53...Nd8 (better is 53...Nd4 54.Rff7 Ne6+–) 54.Re8?? (54.f4 Nc6+–) 54...Kh6?? (54...Nc6 55.Rg8 Kh6+–) 55.Rh8+– Kg6 56.Rg8 (better is 56.f4!? ef4 57.gf4 f5+–) 56...Ne6 ½–½. Luettig,Hendrik – Fladda,Walter, Pinneberg Winter–A, 1997.

3.b5 h6 4.e3 e4 5.Nc3 Nf6 6.d3 Qb4 7.Rb1 Bc5 8.d4 Be7 9.a3 Qa5 10.Bc4 d5 11.Bb3 Ba3 12.Ra1 Qb4 13.Ra3 Be6 14.Nge2 Nbd7 15.0-0 a6 16.Ra4 Qd6 17.Ba3 c5 18.dc5 Nc5 19.Qd4 b6 20.Nf4 0-0 21.ba6 Rfb8 22.Nb5 Qc6 23.Ne6 fe6 24.c4 Na4 25.Ba4 dc4 26.Nc3 b5 27.Bb5 Qc7 28.Bd6 Qb6 29.Bb8 Qd4 30.ed4 Rb8 31.Rb1 Nd5 32.a7 Ra8 33.Bc6 Nc3 34.Ba8 Nb1 35.Be4 Nc3 36.Bb7 Nb5 37.a8Q Kh7 38.Be4 g6 39.Qb7 Kg8 40.Qb5 Time forfeit 1-0. alex296 – kingcCc, Rated Blitz game, lichess.org, 2015.

3.c3 c5 4.Qa4 (4.bc5 Qc5 5.Ba3 Qb6=) 4...cb4 5.cb4 Nc6 6.b5 Qb4 7.Qb4 Nb4 8.Na3 d6 9.e4 a6 (9...Nf6 10.f3=+) 10.Bc3= d5 11.Rb1 (better is 11.ed5 f6 12.d6=) 11...Na2–/+ 12.Rb2?? (12.Be5 f6 (12...Ba3 13.Bg7 de4 14.Bh8+/–; 12...de4?! 13.Nc4 Bf5 14.Nb6=) 13.Bb2 de4–/+) 12...ab5 (better is 12...Nc3 13.dc3 Ba3–+) 13.Nb5 (13.Bb5 Bd7 14.Bd7 Kd7 15.Ra2 Ra3 (< 15...Ba3 16.Bb2=) 16.Ra3 Ba3 17.Be5 f6–/+ (17...de4?? 18.Bg7 Bb2 19.Bb2+–)) 13...Ra4 14.ed5 Ba3?? 15.Ra2+– Re4 16.Ne2 Bb4 17.Kd1 Bg4 18.f3 Bf3 19.gf3 Rg4 20.fg4 Bc3 21.Nec3 Kd7 22.Ra7 Kc8 23.Nd6 Kb8 24.Ncb5 Nf6 25.Rb7 Ka8 26.Nc7 1–0. ifairclough – quikeagle, net–chess.com, 2001.

3.c3 f6 4.e4 Nc6 5.Nf3 Qf7 6.d4 ed4 7.Nd4 Nge7 8.Bd3 Nd4 9.cd4 Ng6 10.d5 (better is 10.Qd2!?+=) 10...Bb4=+ 11.Bc3 Bd6 12.0-0 Nf4 13.Qf3 Be5 14.a4 0-0 15.Bb4?? (better is 15.Bb5–/+) 15...Nd3–+ (< 15...Ba1 16.Qf4 Be5 17.Qe3–+) 16.Bf8 Ba1 (16...Kf8?! 17.Qd3 Ba1 18.Qa3 Qe7 19.Qa1 Qe4 20.Nc3–/+) 17.Bg7 Ne5 (17...Qg7 18.Qd3) 18.Qg3 (18.Qa3–+) 18...Qg7 19.Qg7 Kg7 20.Nd2 Bc3 21.Nb3 Nd3 22.Rd1 Nb2 23.Ra1 b6 24.a5 Nd3 25.ab6 (25.Ra3 Rb8 26.Nd4 Bd4 27.Rd3 ba5–+) 25...Ba1 26.Na1 (26.b7 Bb7 27.Na1 Re8–+) 26...ab6 27.h3 Ra1 28.Kh2 b5 29.Kg3 b4 30.f3 b3 (31.Kg4 b2–+) 0–1. Jan van Dijk – Klaus Behrmann (2265), ChessWorld.net, 2003.

3.Nc3 Qb4 4.Rb1 Qe7 5.e3 Qd8 (5...Nf6 6.Bc4=+) 6.d4 (6.Nf3 d6=+) 6...ed4=+ 7.Qd4 Nf6 8.Bd3 (8...Nc6 9.Qf4–/+). juancabeta – nachodynamite, internet, 2007.

3.Nc3 c6 4.e3 (4.a3!?=) 4...Qb4–/+ 5.Rb1 Qe7 6.Nf3 Nf6 (6...d5 7.Be2–/+) 7.d4 (better is 7.Ne5!? d6 8.Nf3+=) 7...ed4 (7...e4!? 8.Ne5 d6–/+) 8.Nd4+= g6 (8...d5 9.Bd3+=) 9.Bd3 Bg7 10.0-0 0-0 11.Re1 d6 12.e4 Ng4 13.Nf3 Nd7 14.h3 Nge5 15.Ne2? (better is 15.Re3–/+) 15...Nf3–+ 16.gf3 Ne5 (16...Bb2 17.Rb2 Ne5 18.Nc3–+) 17.Ng3 Bh3 18.f4 Qh4?? (better is 18...Nd3 19.cd3 Bh6–+) 19.fe5+= Be5 (19...Bg4 20.Qd2 de5 21.Ba3+/–) 20.Be5+/– de5 21.Rb7 Rfd8 22.Qb1 Bg4 (22...Be6 23.Qb2 Qg5 24.Rb1+/–) 23.Qb3 (23.Bc4 Be6 24.Be6 fe6+–) 23...Be6+/– 24.Bc4 Qf6 (24...Bc4!? 25.Qc4 Qf6+/–) 25.Be6+– fe6 26.Qe3 Rf8 (26...Qf4 27.Qc5 Qf6 28.Qc6+–) 27.Rd1 h5? (27...Rf7 28.Rdd7 Rd7 29.Rd7+–) 28.Rdd7 (better is 28.Nh5 gh5 29.Qg3 Kh8 30.Rdd7 Qf2 31.Qf2 Rf2 32.Kf2+–) 28...Rfe8?? (28...h4 29.Ne2+–) 29.Rg7! Qg7 30.Rg7 Kg7 31.Qg5 Kh7 32.Qe5 Rac8 (32...Rad8 33.Ne2 Rd1 34.Kg2+–) 33.Qc5 (33.Ne2 Rb8+–) 33...a6 (33...h4 34.Qa7 Kh6 35.Ne2+–) 34.Qa7 (34.e5 Kh6+–) 34...Kg8 (34...Kh6 35.e5 Ra8 36.Qe3 Kh7 37.Ne4+–) 35.Qa6 (35.e5 Ra8 36.Qb7 Kf8+–) 35...Red8 (35...e5 36.Qc4 Kg7 37.a4+–) 36.Qc4 (better is 36.Ne2 e5+–) 36...Re8 (36...Rd6 37.Ne2 c5 38.Nf4+–) 37.e5 Kg7 38.Ne4 Rb8 39.Nd6 Re7 40.Qc6 Rb1 (40...Ra7 41.Nb5 Re7 42.Nd4+–) 41.Kg2 Rb2 42.Qc4 (42.Qf3 Ra7 43.Qf6 Kg8+–) 42...Rb8 (42...g5 43.Qa6 Kg8 44.Qa8 Kh7 45.Qa3+–) 43.Qf4 (43.Nc8 Rf7+–) 43...Ra7 (43...Rf8 44.Qg5 Ra7 45.a4+–) 44.Qf6 Kh7 45.Qe6 Rb6 46.Qc4 Rba6 47.Nc8 Ra8 (47...Ra4 48.Qb3 Ra8 49.Qf7 Kh6 50.Ne7 Rg4 51.Kh3+–) 48.e6 1–0. gtate (1720) – gfry (1675), net–chess.com, 2002.

3.c4 a6 4.a3 Nf6 5.e3 d6 6.Be2 Be6 7.d4 ed4 8.Qd4 Nbd7 9.Nc3 g6 10.Nd5 Nd5 11.cd5 1–0. Bonetti,Shane (2157) – CaptinCrunch, ICC, 2002.

3.c4 f5 4.Nf3 e4 5.Ne5 d6 6.e3 de5 7.Qh5 g6 8.Qd1 Qb4 9.Bc3 Qb6 10.f4 Bg7 11.g4 Nc6 12.gf5 Bf5 13.Rg1 0-0-0 14.Qa4 Nh6 15.h3 Rhe8 16.fe5 Be5 17.Na3 Bc3 18.dc3 Qe3 19.Be2 Qg1 Time forfeit 0-1. sunflower66 (1760) - Dooby1 (1885), Rated Blitz game, lichess.org, 2016.

3.c4 f6 4.a3= g6 (4...d6 5.Nc3=) 5.e3 f5 6.c5 (6.d4 d6+=) 6...c6 (6...Nf6 7.Nf3 e4 8.Ne5=) 7.Bc4 Bg7 8.d4 e4 9.f3 (9.Ne2 d5 10.cd6 Qd6+=) 9...b5= 10.Ba2 Nf6 11.Qb3 (11.Nc3 a5=) 11...Rf8 (11...Nd5 12.f4=+) 12.Ne2 (12.f4 Nd5=) 12...d5 (12...ef3 13.gf3 Nd5 14.Kd2=+) 13.Nf4 (better 13.cd6!? Qd6 14.0-0+=) 13...g5 14.Nd5?? (better 14.Ne2=+) 14...Nd5–+ (14...cd5?! 15.fe4 Qe4 16.0-0–+) 15.f4 (15.0-0 ef3 16.Rf3 g4–+) 15...gf4 16.Qd1 (16.ef4 Nf4 17.0-0–+) 16...Ne3 17.Qh5 Kd7 (17...Kd8 18.Qe2–+) 18.Qe2 Re8 (better 18...Qh4 19.Kd2 Bh6–+) 19.Bc1 (19.g3 Bh6–+) 19...Bd4 (better 19...Qh4 20.Kd2 Bd4 21.Bf7–+) 20.Be3 Ba1 (20...Be3 21.Nd2–+) 21.Qd1 (21.Bf4 Be5 22.0-0 Kc7–+) 21...Kc7 22.Bf4 Kb7 23.Bd6 (23.0-0 Qd7–+) 23...Qh4 24.g3 Qh3 25.Bd5 (25.Bf7 Rd8 26.Qd2 Rd7–+) 25...Qg2 26.Rf1 Qb2 (better 26...cd5 27.Qd5 Nc6 28.Qf7 Ka6 29.a4–+) 27.Rf2 Qe5 (better 27...Qd4 28.Bf7 Qd1 29.Kd1 Rd8–+) 28.Bc6 Kc6 (28...Nc6 29.Be5 Annihilates a defender: e5) 29.Be5 Threatening mate... how? 29...Kb7?? (better 29...Be5 30.a4 Be6–+) 30.Qd5 (30.Ba1!? Nc6+–) 30...Nc6 31.Qf7 (better 31.Ba1 Be6 32.Qd1+–) 31...Re7= 32.Qd5?? (better 32.Qe7! Ne7 33.Ba1=) 32...Re5 (32...Be5 33.Qd1–+) 33.Qf7 (33.Qd1 Re7–+) 33...Re7 34.Qd5 (34.Qa2 Bd4 35.Rf4 Be3–+) 34...Be6 35.Qd2 (35.Qd1 Rd8 36.Qc1 Bd4–+) 35...Rd8 (better 35...e3!? 36.Qe3 Bd5 37.Qe7 Ne7 38.Rd2–+) 36.Qe3 (36.Qg5 e3! 37.Re2 Rd3 38.Re3 Re3 39.Qe3 Ba2 40.Qe7 Ne7–+) 36...Bd4 37.Qh6 Bf2 38.Kf2 e3! 39.Ke3 Decoy to e3 (39.Qe3 Decoy to e3 39...Bc4 Discovered attack) 39...Ba2 A double attack 40.Kf4 (40.Kf2 Bb1 41.Qg5 Rd1–+) 40...Bb1 (40...Rd4!? 41.Kf3 Bd5 42.Kf2–+) 41.Qf6 Re4 (better 41...Bd3 42.Kf3 Bc4–+) 42.Kf5 (42.Kg5–+) 42...Rde8 (42...Rd5 43.Qe5 Rde5 44.Kf6 Rg4 45.h4 Rg6 46.Kf7 Ba2 47.Kf8 Rg8) 43.Qf7 (43.Qa1 Re1 44.Kg5 R8e5 45.Qe5 Re5 46.Kf4 Re4 47.Kg5 Re2–+) 43...R4e7 44.Kf6 Rf7 45.Kf7 Re3 46.Kf6 Ra3 47.h4 Rg3 48.Ke6 (48.h5 Rf3 49.Kg5 Nb4 50.c6 Nc6 51.h6 a5 52.Kh5 Ne5 53.Kg5 Nf7 54.Kh4 Bf5 55.Kh5 Rh3) 48...Rg4 (48...Rf3 49.Kd7 Bg6 50.Kd6 Bf5 51.h5 Rd3) 49.Kd7 (49.Kf6 Rg6 50.Kf7 Ba2 51.Ke8 Rg8 52.Kd7 Rd8) 49...Rh4 (49...Bf5 50.Ke8 Be6 51.h5 Rg8) 50.Ke8 (50.Ke6 Rf4 51.Kd7 Bg6 52.Kd6 Bf5 53.Kd5 Rd4) 50...Rb4 (50...Rf4 51.Kd7 Bg6 52.Kd6 Bf5 53.Kd5 Rd4) 51.Kd7 (51.Kf7 Rf4 52.Kg8 Rg4 53.Kf7 Rg6 54.Kf8 Ba2 55.Ke8 Rg8 56.Kd7 Rd8) 51...h5 (51...Ba2 52.Ke8 Rg4 53.Kd7 Rd4 54.Ke8 Rd8) 52.Kd6 (52.Ke6 Rf4 53.Kd7 Bg6 54.Kd6 Bf5 55.Kd5 Rd4) 52...h4 (52...Bf5 53.Kd5 Rd4) 53.Kd7 (53.Ke6 Rf4 54.Kd7 Bg6 55.Kd6 Bf5 56.Kd5 Rd4) 53...h3 (53...Re4 54.Kd6 Ba2 55.Kd7 Rd4 56.Ke8 Rd8) 54.Kd6 (54.Ke6 Rf4 55.Kd7 Bg6 56.Kd6 Bf5 57.Kd5 Rd4) 54...h2 (54...Bf5 55.Kd5 Rd4) 55.Kd5 (55.Ke6 Re4 56.Kf5 h1Q 57.Kf6 Qh6 58.Kf7 Ba2) 55...h1Q (55...Ba2 56.Kd6 Rd4) 56.Kd6 (56.Ke6 Qe4 57.Kf7 Qg6 58.Kf8 Rf4) 56...Rd4 (56...Qe1 57.Kd5 Rd4) 57.Ke6 Qe4 (57...Qh5 58.Kf6 Qg6) 58.Kf6 (58.Kf7 Qg6 59.Kf8 Rd8) 58...Qf5 (58...Qg6) 59.Kg7 Qg6 60.Kf8 Rd7 (60...Rd8) ½–½. MARYMARY – Samparrk, ChessWorld.net, 2012.

3.c4 g6 4.b5 (4.Nf3 Bg7=) 4...Bg7 5.e3 Nf6 6.Nc3 c6 (6...0-0 7.e4=) 7.Nf3 0-0 8.d4 e4 9.Nd2 d5 10.a4 Rd8 11.a5 (11.bc6 bc6 12.Ba3 Qe6=) 11...Nbd7 (11...cb5 12.cb5 Bg4 13.Qb3=) 12.a6 (12.Ba3 Qe6+=) 12...c5 13.Ba3 Qe8? (13...ba6!? 14.cd5 Bb7 15.ba6 Bd5+=) 14.dc5 (14.ab7 Bb7 15.dc5+/– (15.Bc5?! Nc5 16.dc5 Qe5+=)) 14...d4? (better is 14...ba6 15.cd5 Qe5+/–) 15.ab7+– Bb7 16.ed4 e3 17.Nb3 ef2 18.Kf2 Ne5 Do you see the mate threat? 19.Qe2 Nfg4 (19...Neg4 20.Kg1 Ne4+–) 20.Kg1 Rd4 21.Nd4 Rd8 (21...Nc4 22.Nc2 Bc3 23.Qc4 Ba1 24.Qg4 Rd8+–) 22.Nc2 Bf3 23.Qe1 (23.gf3 Rd2 24.fg4 Re2 25.Ne2 Nc4+–) 23...Bh6 24.Nd5 (24.gf3 Nf3 25.Kg2 Ne1 26.Re1 Rd2 27.Re2 Rc2 28.Rc2 Ne3 29.Kf3 Nc2–+) 24...Bd5 25.cd5 Rd5 26.h3 Ne3 27.Ne3 (27.Qe3 Be3) 27...Nf3 Theme: Double Attack 28.Kf2 (28.gf3 Be3) 28...Ne1 29.Nd5 (29.Re1 Rd2 30.Kg3 Qe5 31.Kh4 Qg5) 29...Qe5 30.Re1 Qf5 (30...Qd5 31.Re8 Kg7 32.Bb2 f6 33.g3 Qh1 34.Re7 Kf8 35.Re2=) 31.Kg1 Qd5 The mate threat is Qd4 32.Kh2 (better is 32.Re8 Kg7 33.Re2 Bf4+–) 32...Qb3?? (32...Bf4 33.g3 Qa2 34.Be2 Bg3 35.Kg3 Qa3 36.Kf4 Qc5+–) 33.Bc1 Bc1 34.Rc1 Qe3 35.Rd1 (better is 35.Rc2 Qe5 36.g3 h5+–) 35...Qc5 36.g3 h5 37.h4 g5 38.hg5 h4 39.Rd3 (39.gh4 Qe5 40.Kh3 Qe3 41.Kg2 Qe4 42.Kf2 Qf4 43.Ke2 Qe4 44.Kf2 Qf4 45.Ke1 Qe4 46.Kf2=) 39...Qc2 (39...Qg5 40.Kh3 Qf5 41.Kg2 Qe4 42.Rf3 Qc2 43.Kh3+–) 40.Kh3 hg3 41.Rg3 (better is 41.Kg3!? Qc7 42.Kg2 Qf4+–) 41...Qh7 42.Kg2 Qe4 (42...Qc2 43.Kg1 Qc5 44.Kh2 Qf2 45.Bg2+–) 1–0. Katalymov,Boris N – Zaitsev,Igor A, URS–ch sf Odessa, 1972.

3.e3 a6 4.a3= Nc6 5.Ne2 (5.Nc3 Nf6 (5...Qe6 6.b5 ab5 7.Nb5 Bd6 8.Nf3 Nf6 9.Ng5 Qf5; 5...b5 6.Nh3 Nf6 7.Qf3 Bb7 8.Ng5 g6 9.Be2 Bg7; 5...Qd8 6.Nf3 Nf6 7.d4 e4 8.Ne5 d5 9.Be2 Bd6; 5...d6 6.Nd5 Qd8 7.Ne2 Nf6 8.Nec3 Bf5 9.Nf6 gf6) 6.Bc4 e4 7.Nge2 Ne5 8.Bb3 d6 9.Ng3 Bg4; 5.Bc4 Qh4 (5...Qg5 6.Nf3 Qg4 7.d3 Nf6 8.0-0 d5 9.Bb3 Bd6; 5...Nf6 6.Nc3 d6 7.Nf3 Be6 8.Be6 fe6 9.0-0 0-0-0; 5...Qd8 6.Nf3 d5 7.b5 Na5 8.Bf1 e4 9.Ne5 Nf6; 5...d6 6.Nc3 Nf6 7.Nf3 Be6 8.Be6 fe6 9.0-0 0-0-0; 5...g6 6.Nf3 Nf6 7.Nc3 Bg7 8.0-0 0-0 9.Qe2 d6) 6.Bb3 e4 7.Nc3 Nf6 8.g3 Qg5 9.Nh3 Qf5) 5...b5 (5...d5 6.d4 e4 (6...Nf6 7.de5 Ne5 8.Nf4 Qd6 9.Nc3 Be6) 7.Nf4= (7.Nbc3 Nf6 8.Nf4 Qd8 9.Be2 Be7) 7...Nf6 8.Nc3 Qd8 9.Be2 Be7; 5...Nf6 6.d4 d5 7.de5 Ne5 8.Nf4 Qd6 9.Nc3 Be6) 6.d4 (6.Nbc3 Nf6 7.Ng3 g6 8.Bd3 Bg7 9.0-0 0-0) 6...ed4 7.Nd4 Bb7 (7...Nd4 8.Qd4 Bb7 9.c4 bc4) 8.Qd3 (8.c4 Nd4 9.Qd4 bc4) 8...Nd4 (8...Nf6 9.Nd2 Ne5) 9.Bd4 d6 (9...Nf6=) 10.c4 bc4 11.Qc4 c6 (11...c5 12.Bb2=) 12.Nc3+= Nf6 13.Bd3 d5 14.Qb3 Qe6 15.0-0 Be7 16.Na4 0-0 17.Nc5 (17.Qc2 a5+/–) 17...Bc5 18.Bc5 Rfd8 19.a4 Ne4 20.Be4 (20.Qc2 Re8+/–) 20...Qe4+= 21.Rad1 Re8 22.Rd4 ½–½. xadrezpg (2660) – grahamtrue (2195), net–chess.com, 2010.

3.e3 e4 (--> 1.b4 e5 2.Bb2 e4 3.e3 Qe7).

3.e4 d5 4.Be5?? (better 4.ed5 Nf6 5.c4+=) 4...Qe5-+ 5.c3 de4 6.Bc4 (6.Qe2 Nd7-+) 6...Bb4! 7.Ne2?? (7.cb4 Qb2 Double attack (7...Qa1 Pinning; 7...Qa1 Deflection; 7...Qb2 Decoy)) 7...Bd6 8.Ng3 h5 (8...Nf6 9.0-0-+) 9.h3 (9.Qb3 Nh6-+) 9...Nf6 10.a4 h4 11.Ne2 Bf5 (11...Qg5 12.Kf1-+) 12.Nd4 Nbd7 13.Bb5 0-0-0 14.Qb3 (14.a5 c5 15.Nf5 Qf5-+) 14...Nc5 15.Qc2 (15.Qf7 Ne6 16.Na3 Nd4 17.cd4 Qd4-+) 15...c6 16.Be2 (16.Kf1 cb5 17.ab5-+) 16...e3 (16...Nd3 17.Kf1 Bc5 18.a5 Rd4 19.Bd3 ed3 20.Qd1 Rf4 21.Ra2 Rf2 22.Kg1 Rf3) 17.Nf5?? (better 17.Qf5 Qf5 18.Nf5 ed2 19.Nd2-+) 17...ef2 18.Kf2 (18.Kd1 Nce4 19.Nd6 Rd6-+) 18...Nce4 19.Ke1 Qf5 20.Rf1 Bg3 21.Kd1 Nf2 22.Kc1 Qc2 (better 22...Qd5 23.Qa2 Qg2 24.Qf7-+) 23.Kc2 N6e4 24.d3 (24.Bc4 Rd7-+) 24...Ng5 (24...Nf6 25.c4-+) 25.Nd2 (25.d4 Ne6-+) 25...Rhe8 26.Bd1 (26.Rae1 Nd3! 27.Bg4 Ne6-+) 26...Nd3 27.Bg4 Kb8 28.Rf5 f6 29.Rb1 (29.Kb3 g6 30.Rff1 Nf4-+) 29...Ne5 (better 29...Ne1 30.Re1 Re1 31.Nc4-+) 30.Rff1 (30.Be2-+) 30...Ng4 31.hg4 Re2 32.Rbd1 Rg2 33.Rfe1 Be1 34.Re1 Rdd2 35.Kb3 h3 36.Re8 Kc7 37.Re7 Kd6 38.Rg7 (38.Re1 Kc5 39.Rb1 h2 40.a5 h1Q 41.Rh1 Rb2 42.Ka3 Ra2 43.Kb3 Rgb2) 38...h2 (38...Rb2 39.Kc4 Rg4 40.Kd3 Rg3 41.Kd4 Ne6 42.Ke4 Re2 43.Kf5 Rf2 44.Ke4 f5) 39.Rg6 (39.Rg8 Rb2 40.Ka3 h1Q 41.Rd8 Kc5 42.Rd5 cd5 43.a5 Qa1) 39...Ne4 (39...Rb2 40.Kc4 Rg4 41.Kd3 Rg3 42.Kd4 Ne6 43.Ke4 h1Q 44.Kf5 Qf3) 40.Rh6 (40.Rg8 Rb2 41.Kc4 Nd2 42.Kd4 c5 43.Ke3 Rg3 44.Kf2 Ne4 45.Kf1 h1Q) 40...Rd1 (40...Nc5 41.Kb4 Rb2 42.Kc4 Rg4) 41.g5 (41.Rh5 Rb1 42.Ka3 Nc3 43.Rh2 Rh2 44.g5 Ra2) 41...h1Q (41...Nc5 42.Kb4 Rb1 43.Kc4 Rg4) 42.Rg6 (42.Ka3 Ra1 43.Kb4 Qb1 44.Kc4 Ra4) 42…Rg5 (42...Rg5 43.Rg7 Rb1 44.Kc4 Qf1 45.Kd4 Rd5 46.Ke4 Re1; 42...Nc5 43.Kb4 Rb1 44.Kc4 Qh4) 0-1. alessandrocarvalhaes (1655) - k_hamed (1645), lichess.org, 2017.

3.e4 g6 4.f4 Bg7= 5.Nf3 d6 (5...Nc6 6.b5 Nd4 7.fe5 (7.Ne5? Be5 8.fe5 Qh4 9.g3 Qe4 10.Kf2 Qh1 11.Bd4 Qh2 12.Bg2 h5-+) 7...Nf3 8.Qf3 (worse 8.gf3 d6=) 8...Be5 9.d4+=) 6.a3 (6.Bc4 Nf6+=) 6...Nh6 (6...Nf6=) 7.d4 (better 7.Bb5!? c6 8.Be2+=) 7...ed4 8.Nd4 (8.Bd3 f5 9.0-0 Ng4=) 8...0-0 (better 8...c5 9.bc5 dc5-+) 9.Bd3? (better 9.Nc3 Nf5 10.Nde2 Bc3 11.Nc3 Qh4 12.Ke2 Qf4 13.Qd2=+) 9...Nc6?? (better 9...c5-+) 10.Nc6+= bc6 11.Bg7 Kg7 12.0-0 Bg4 13.Qd2 d5 (13...Qf6 14.Qc3+=) 14.f5 (14.Qc3 Qf6+/-) 14...gf5 15.ef5 f6 16.h3 (16.Nc3 Qe5+/-) 16...Bh5 (16...Bf5!? 17.Nc3 Bd3 18.Qd3 a5 19.Qg3 Kh8=) 17.g4 (17.Re1 Qd7+/-) 17...Bf7+= 18.Re1 Qd6 19.g5?? (better 19.Qh2+/-) 19...Qg3-+ 20.Qg2?? (20.Kf1 Qh3 21.Kf2 Qh4 22.Kg2 fg5 23.Nc3 Qg4 24.Kh2 Nf5 25.Bf5 Qf5 26.Re7-+) 20...Qg2 (better 20...Qe1 21.Qf1 Qf1 22.Kf1 fg5-+) 21.Kg2=+ fg5 22.Nd2 Rfe8 (22...Kf6 23.Rf1=+) 23.Nf3 Re1 (23...Kf6 24.Nd4=) 24.Re1+= (worse 24.Ne1 Kf6-/+) 24...Kf6 25.Ne5 Re8 26.Nf3?? (better 26.Nd7 Kg7 27.f6 Kg8 28.Re8 Be8 29.Ne5=) 26...Re1-+ 27.Ne1 Nf5 28.Kf2 (28.Bf5 Kf5 29.Nf3 Be8-+) 28...Bg6 29.Bf1 Nh4 30.Nd3 Bd3 31.Bd3 Nf5 32.Ba6 h5 33.Bb7 Nd4 34.Bc8? (34.c3 Nb5 35.Bc6 Nc3 36.Be8-+) 34...Nc2 35.Kf3 (35.Bb7-+) 35...Na3 36.Ke3 Nc4 (better 36...Nc2 37.Kd2 Nb4 38.Bd7-+) 37.Kd4 Nb6 (better 37...Ne5-+) 38.Kc5 (38.Bb7-+) 38...Nc8 39.Kc6 (39.Kd4 g4 40.hg4 h4-+) 39...d4 40.Kc7 d3 41.b5 d2 42.Kc8 d1Q Black intends g4 43.Kb7 Qa4 44.Kc6 Qa5 45.Kc5 Qb6 46.Kc4 g4 47.h4 (47.hg4 hg4 48.Kb3 Qb5 49.Kc2 g3 50.Kc3 g2 51.Kd4 g1Q 52.Kc3 Qe3 53.Kc2 Qbb3) 47...g3 48.Kb4 g2 49.Ka4 (49.Kb3 Qb5 50.Kc2 g1Q 51.Kc3 Qe3 52.Kc2 Qbb3) 49...g1Q 50.Ka3 (50.Kb3 Qb5 51.Kc3 Qe3 52.Kc2 Qbb3) 50...Qb5 51.Ka2 Qgb1 52.Ka3 Q1b3 0-1. EvgeniyR (1725) - icedtea (1750), Rated Blitz game, lichess.org, 2020.

3.Nf3 Qb4?! 4.Be5 d6 5.Bc3 +=.

3.f4 d6 4.Nf3 Nd7 5.c4 e4 6.Nd4 Ngf6 7.Nf5 Qe6 8.Ne3 Be7 9.f5 Qe5 10.Be5 Ne5 11.Nd5 Bf5 12.Nc7 Kd7 13.Na8 Ra8 14.Nc3 Nc4 15.Qa4 Kc8 16.e3 Nb6 17.Qa5 Be6 18.h3 Bd8 19.g4 Bc7 20.Qb5 Bd7 21.Qe2 d5 22.Bg2 Bg3 23.Kd1 Kd8 24.Kc2 Rc8 25.a4 Rc4 26.b5 Be5 27.g5 Ne8 28.Ra3 Nd6 29.Qh5 Bf5 30.Rf1 Bg6 31.Qe2 Nd7 32.Kd1 d4 33.Ne4 d3 34.Rd3 Re4 35.Rd6 Bd6 36.Be4 Be4 37.Rf7 Ne5 38.Rg7 Bf3 39.d4 Be2 40.Ke2 Nc4 41.Rb7 1-0. Dambldord (2195) - raminder57 (1965), Rated Classical game, lichess.org, 2014.

3.f4 ef4 4.Nf3 b6 5.a3 Bb7 6.d3 (6.Qc1 Nf6–/+) 6...Nf6–+ 7.c4 (7.Nc3 a5 8.b5 Ng4–/+) 7...Ng4 8.Nbd2 Ne3 9.Qb3 d6 (9...a5 10.b5–+) 10.g3 fg3 11.hg3 a5 12.ba5 Ra5 13.Bh3 Na6 (13...Bc6 14.Kf2 Ba4 15.Qc3–/+) 14.Bc3 Nc5 15.Qb1 Ra7 (15...Ra8 16.Bd4 Bc8+=) 16.Kf2? (better is 16.Bd4!? f5 17.Be3 Qe3 18.Bf5=) 16...f5–+ 17.Qb5 (17.Bd4 Ng4 18.Ke1 Bc6–+) 17...Kf7 (17...Kd8 18.Rhc1–+) 18.Ra2 Ng4 19.Bg4?? (better is 19.Kf1–+) 19...fg4 20.Nh4 (20.Rf1 gf3 21.Nf3–+) 20...Bh1 21.Nb3 (21.Qb1 Bc6–+) 21...Qe8 (better is 21...c6 22.Qb4 d5 23.Qb6 dc4 24.Nc5 Qc5 25.Bd4 Qb6 26.Bb6–+) 22.Qe8 Ke8 23.Nd4 (23.Nc5 dc5 24.e4 Rg8–+) 23...Kd7 24.Nb5 Ra6 0–1. dixi82 – smoothmovermovesagain, ChessWorld.net, 2006.

3.g3 d5 4.Bg2 Nf6 5.a3 a6 6.d3 Nc6 7.Nd2 Qd6 8.Ngf3 Be7 9.0-0 0-0 10.Re1 Bg4 11.e4 de4 12.Ne4 Ne4 13.Re4 The pressure on e5 grows 13...f5 14.Re1 Rad8 15.Qe2 e4 (better 15...Bf6!? 16.Qe3 e4 17.Bf6 Qf6 18.de4 f4 19.gf4 Qf4=) 16.de4+/- fe4 (16...f4 17.Rad1 Qh6 18.Rd8 Rd8 19.Rd1+/-) 17.Qe4 Qd7 (17...Bh5 18.Ne5 Ne5 19.Be5+-) 18.Ne5 Ne5 19.Be5 (19.Qe5?? Bf6 20.Bd5 Qd5 21.Qd5 Rd5 22.Bf6 Rf6-+ (worse 22...gf6 23.Re7-+)) 19...Bg5 (19...Bf6 20.Qc4 (20.Qb7?! Be5 21.Re5 Qd4+=) 20...Be6 21.Qc7 Qc7 22.Bc7 Ba1 23.Bd8 (23.Ra1?! Rd7 24.Bb6 Re8=; 23.Re6 Rd1 24.Bf1 Rc8=+) 23...Rd8 24.Bb7+- (worse 24.Re6 Rd1 25.Bf1 Bd4+-)) 20.Qc4 Rf7 (20...Be6 21.Qc7 Bg4+-) 21.Bb2?? (better 21.Bb7 h6 22.f4+- (22.Qa6?! Bd2 23.Re4 c5 24.bc5 Qf5 25.Rg4 Qe5+-; 22.Ba6?! Bd2+-)) 21...Qd2?? (better 21...b5 22.Qb3 Qd2+/-) 22.Qg4+- Qf2 23.Kh1 Rd2 (23...Qf5 24.Qf5 Rf5 25.Bb7+-) 24.Qe4 (better 24.Re8 Rf8 25.Rf8 Qf8 26.Qg5+-) 24...Re7 (24...Bf6 25.Bf6 gf6 26.Rf1+-) 25.Qd5! Rd5 26.Bd5 Kh8 (26...Kf8 27.Rf1 Re2+-) 27.Bg7 (better 27.Rf1 Qf1 28.Rf1+-) 27...Kg7-+ 28.Rf1 (28.Re7 Be7 29.Bb7 c6-+) 28…Qc2 (28...Qc2 29.Bf3 c6-+) 0-1. Darkseid (1895) - Matt8x8 (1910), ChessWorld.net, 2018.

3.g3 Nf6 4.Bg2 d6 5.d3 Nbd7 6.Nd2 Nb6 (6...d5 7.a3=+) 7.a3 (7.c4 c6=) 7...Nbd5 (7...Na4!? 8.Qb1 c6=+) 8.c4 Nb6 9.Qc2 c6 10.a4 (10.Ngf3 Be6+=) 10...Qc7 (10...d5 11.b5=) 11.b5 (11.Ngf3 a5 12.ba5 Ra5=) 11...cb5 12.ab5 Be7 13.Ngf3 0-0 14.0-0 Nfd7 (14...Be6 15.Rfc1=) 15.Rfe1 Nc5 16.d4 Ne6 (16...ed4 17.Bd4 Re8 18.Red1+=) 17.de5+/- de5 (17...d5 18.Rec1+/-) 18.Be5 Bd6 19.Bd6 Qd6 20.Red1 Nd4 (20...a6 21.ba6 Ra6 22.Ne4+/-) 21.Qd3 (better 21.Nd4!? Qd4 22.c5 Nd7+-) 21...Nf3 22.Nf3 (22.ef3?? Qd3 23.c5 Nd7-+; 22.Bf3?! Qc7+-; 22.Qf3?! Qc7+-) 22...Qf6 (22...Qc5 23.Nd2+-) 23.Nh4 (23.c5 Nd7 24.Qd6 a5+-) 23...Be6 (23...Qe7 24.Nf5 Bf5 25.Qf5 Nc4 26.Qd7+-) 24.Bb7 (24.c5!? Nd7 25.Qd6 Rad8+-) 24...Rad8+/- 25.Qf3 Qg5 26.c5 Nc4 (26...Rd1 27.Rd1 Qc5 28.Bc6+/-) 27.c6 (27.Rd8 Rd8 28.c6 Qe5+-) 27...Qb5 28.c7 (better 28.Rd8 Rd8 29.c7+/- (29.Ra7 Qb1 30.Kg2 Nd2-+)) 28...Rde8?? (better 28...Rd1 29.Rd1 g5+/-) 29.Bc6+- (29.Ra7?! Qc5 30.Rda1 Re7+/-) 29...Ne5 (29...Qb6 30.Be8 Re8+-) 30.Bb5 Nf3 31.Nf3 Rc8 32.Ra7 f6 (32...g6 33.Ng5 Bg4 34.h3+-) 33.Ba6 (33.Nd4 Bh3+-) 33...Rce8 34.e3 Bc8 (34...Bg4 35.Bc4 Kh8 36.Kg2+-) 35.Bc8 (better 35.Bc4!? Kh8 36.Bb5 Kg8 37.Be8 Re8+-) 35...Rc8 36.Nd4 Kf7 37.Nb5 Ke7 38.Rd4 (38.Ra4!? f5 39.Rad4 Rg8 40.Rd7 Kf6+-) 38...g5 (38...f5 39.Nd6+-) 39.Nd6 1-0. JUANKARODA (1765) - keikhosro (1755), lichess.org, 2020.

3.h3 Qb4 4.Be5 Nc6 5.Bc3 Qa4 6.a3 d5 7.e3 Bf5 8.Ra2 0-0-0 (8...d4 9.ed4 Nd4 10.Bd4 Qd4 11.Nf3=+) 9.Nf3 Nf6 10.Ng5 (10.Bf6 gf6 11.Nc3 Qa5+=) 10...Bg6 11.Bf6 gf6 12.Nc3 Qa5 13.Nf3 d4 (13...Ba3? 14.Nb5+-) 14.Ne2 (14.ed4 Nd4 15.Nd4 Rd4-/+) 14...de3 15.fe3 Bh6 16.Qc1? (better 16.Ned4!? Nd4 17.ed4-/+) 16...Be3-+ 17.c3 Bh6 18.g4?? (better 18.Ned4 Bf4 19.Kf2-+) 18...Be4 (18...Qd5 19.Qa1 Qf3 20.Rh2-+) 19.Kf2?? (19.Bg2-+) 19...Bf3 20.Kf3 (20.Rg1 Rhe8 21.Rb2 Be2 22.Be2 Qe5-+) 20…Qd5 (20...Qd5 21.Kg3 Qa2-+) 0-1. beatmeeasy (1960) - Bigpetroman (1975), lichess.org, 2021.

3.h3 Nf6 4.g4 d5 5.Bg2 Be6 6.g5? (better 6.Be5 Nc6 7.Bf6 Qf6 8.Nc3=) 6...Nfd7-+ (worse 6...Qb4 7.Ba3 (worse 7.Be5 Ne4=+) 7...Qf4 8.gf6 Qf6 9.Bf8+/-) 7.h4 g6 (7...Qb4!? 8.Ba3 Qd4-+) 8.Nf3 (8.a3=+) 8...d4 (8...Qb4 9.Ba3 Qf4 10.Bb2-/+) 9.h5 (9.Nd4 ed4 10.Bd4 Rg8 11.Bb7 Qb4 12.Ba8 Qd4+=) 9...Bg7 (better 9...Qb4!? 10.Ba3 Qb6=+) 10.h6= Bf8 11.Ng1 (better 11.c3!?=) 11...c6 12.Nf3 Qb4 13.Ba3 Qb5 14.Bf8 Rf8 15.a4 Qb2 16.Na3 Na6 17.Bh3 0-0-0 (17...e4!? 18.Be6 fe6-/+) 18.Be6=+ fe6 19.Nc4 Qb4 20.Nce5 c5 (20...Ne5 21.Ne5 Qc5 22.Nf3-/+) 21.Nd3 Qa5 22.Qb1 Rfe8 (22...c4 23.Nb2 Qd5 24.Rf1-/+) 23.Nfe5 (better 23.Nde5!? Ne5 24.Ne5=) 23...c4=+ 24.Nc4 (24.Nf7!? Qd5 25.Rg1 cd3 26.cd3-/+) 24...Qd5-+ 25.Rf1 White intends a5 (25.Rh4 Qc4 26.Qb5 Nb6-/+ (26...Qc2? 27.Rd4 Qc6 28.Rc4+-)) 25...Qc4 26.Ra2 e5 27.Rb2 b6 (27...e4 28.Nf4 Ndc5 29.e3-+) 28.a5 e4 29.ab6 (29.Nf4 Re5 30.ab6 Nb6-+) 29...Nb6 (29...ed3 30.ba7 Re2 31.Kd1-+) 30.Nb4 (30.Nc1 e3 31.Qa2 ed2 32.Kd2 Nc5-+) 30...Nb4 (better 30...e3 31.Nd3 ed2 32.Kd2 Na4-+) 31.Rb4 Qa6 32.d3 (32.Rb5 Rd5 33.Rd5 Nd5-+) 32...ed3 33.cd3 Re5 (better 33...Nd5!? 34.Rc4 Kd7 35.Rd4 Qa5 36.Kd1-+) 34.Qc1 Kb7 35.Rg1?? (35.f4 Qa5 36.fe5 Qb4 37.Qd2 Qb1 38.Qd1-+) 35...Qd3 (35...Qa5 36.Qd2 Rde8 37.Rb6 Qb6 38.Kf1-+) 36.Rb2 (36.Qd2 Re2! 37.Qe2 Qc3 38.Kf1 Qb4 39.Qe4 Kc8 40.Kg2-+) 36...Rde8 37.Qd1 (37.Kf1 Re2 38.Re2 Re2-+) 37...Qc4 (better 37...Qc3 38.Kf1 Qb2-+) 38.Kf1 (38.Rg3-+) 38…d3! (38...d3 39.ed3 Re1 40.Qe1 Re1 41.Ke1 Qc1 42.Ke2 Qb2 43.Kf3 Qc3-+) 0-1. beatmeeasy (1890) - ical_villa (1865), lichess.org, 2020.

3.h4 d5 4.a4 Nf6 5.h5 h6 6.Nf3 Nbd7 7.Ba3 Qe6 8.Nc3 Nb6 (8...d4 9.Nb1-/+) 9.a5 (9.e3!?=+) 9...Nc4-/+ 10.Nb5? (10.Qc1 Qe7-/+) 10...Qc6 (better 10...Qd7 11.Nc3 d4 12.Nb1-+) 11.d3? (11.Nc3 Na3 12.Ra3 Bb4-+) 11...Qb5 (better 11...Na3!? 12.Na3 Bb4 13.Nd2-+) 12.dc4 dc4 (12...Qc4!? 13.Nd2 Qc3 14.Qc1-+) 13.c3 Be6 14.e3 Bd6 15.Qe2 0-0 16.Rh4 Rfe8 17.Rc4 (17.Nd2!?-/+) 17...Bc4-+ 18.Qc4 Qc4 19.Bc4 Nh5 20.Rd1 Rad8 21.Bc1 Nf6 22.b5 Ne4 23.Bb2 Nc5 24.Bd5 (24.Be2 Na4 25.Ba1 Re7-+) 24...Kf8 (24...e4!? 25.Nd4-+) 25.Ba3 b6 (better 25...Na4!? 26.Bd6 Rd6 (worse 26...cd6 27.Bb7 Nc3 28.Rc1 Nb5 29.Bc6-+) 27.Bb7 Rd1 28.Kd1 Nc3 29.Kc2 Nb5-+) 26.Bc6-/+ Re7 27.ab6 ab6 28.Bc5 bc5 29.Rd5 f6 (29...g6 30.Nd2-+) 30.g4 (30.Nh4 Re6-/+) 30...Rb8 (better 30...g6!?-+) 31.Nh4=+ Kf7 32.Nf5 Rb6 (32...Re6!?=+) 33.Ne7 Ke7 34.c4 Ke6 35.Rd1 (35.e4 Ke7+=) 35...Rb8 (35...f5 36.gf5 Kf5 37.Ke2=) 36.Bd5+= Ke7 37.Ra1 Rd8 38.Ra7 Rb8 39.Ke2 g6 40.Kf3 Kf8 41.Kg3 Kg7 (41...f5 42.gf5 gf5 43.e4=) 42.f4 (42.e4!?+=) 42...ef4= 43.ef4 g5 44.Rb7 Rb7 45.Bb7 Bf4 46.Kf3 Kf7 (46...f5 47.gf5 h5 48.Bc6-/+) 47.Ke4 (47.Bc8 Ke7+=) 47...Ke6 (better 47...Kg6!?=+) 48.Bd5+= Kd6 49.Kf5 Be5 50.Kg6 Ke7 51.Kh6 Bf4 52.Kg6 Bd2 53.Kf5 Bc3 54.Bc6 Be5 55.Bd5 Kd6 (55...Bc3!?=) 56.Kg6 c6 (56...c6 57.Bc6 Kc7+/-). beatmeeasy (1935) - eknight003 (1945), lichess.org, 2020.

4.e3 h6 5.c4 Na6 6.Be2 Nc7 7.Nc3 d6 8.d3 Bd7 9.Nf3 Be6 10.0-0 g6 11.h3 Bg7 12.c5 (12.d4 f5+=) 12...d5 (12...dc5 13.Ne4 cb4 14.Ne5=) 13.Qc2 Nf6 (13...0-0-0 14.Qa4 Kb8 15.b5 Qc5 16.bc6 Qc6 17.Qc6 bc6 18.Rab1=) 14.Rad1 (14.Ne5 Bh3 15.Nc6 bc6 16.gh3 Qe6+/–) 14...0-0 (14...Nd7 15.d4=) 15.Qb1 (15.Ne5 Bh3 16.Nc6 bc6 17.gh3 a5+=) 15...Qd7 (15...Nd7 16.d4=) 16.Qc2 (16.Ne5 Qe7+/–) 16...Rfe8 (16...Qe7 17.Ne5 Bh3 18.Ng6 fg6 19.gh3+=) 17.Qb1 (better is 17.Ne5!? Qe7 18.d4+/–) 17...Nh7 18.Qc2 Re7 19.Qb1 Rae8 20.Qc2 f5 21.Qb1 (21.d4 ed4 22.Nd4 Ng5+=) 21...Bf7 Black prepares e4 (21...d4 22.Na2+=) 22.Qc2 (22.d4 ed4 23.Nd4 Ne6 24.Ne6 Qe6+=) 22...Qc8 (22...d4 23.Nb1+=) 23.Qb1 (23.d4 ed4 24.Nd4 Ne6+=) 23...e4 (23...d4!? 24.Na2 de3 25.fe3 Nd5–/+) 24.de4 de4 25.Nd4 Nf6 26.Rfe1 Nfd5 27.Nd5 Nd5 28.Bf1 Be5 29.Ne2 Bb2 30.Qb2 b6 31.cb6 ab6 32.Nc3 Nc3 33.Qc3 b5 (33...Bd5 34.b5 Rc7 35.Qb2+=) 34.Rd2 Bc4? (better is 34...Qa8+=) 35.Bc4+– bc4 36.Red1 Rd7?? (better is 36...Kh7+–) 37.Rd7 Qd7 (37...Re7 38.Re7 Qf8 39.Rd8 Qd8 40.Qg7) 38.Rd7 Rb8 (38...Re7 39.Re7 f4 40.Qg7) 39.Rd4 (39.Qg7) 39...c5 40.bc5 (40.Rd7 cb4 41.Qg7) 40...Rb2 (40...Rb1 41.Kh2 Rb2 42.Rd7 Rf2 43.Qg7) 41.Qb2 (41.Rd7 Rb1 42.Kh2 Rh1 43.Kh1 Kf8 44.Qh8) 41...g5 (41...Kf7 42.Rd7 Ke6 43.Qg7 f4 44.Qe7 Kf5 45.Rd5) 42.Rc4 (42.Rd7 c3 43.Qb8) 42...Kf7 43.Rc1 (43.Qb7 Kf6 44.Rd4 g4 45.Rd6 Kg5 46.Qg7 Kh5 47.Qh6) 43...Kg6 (43...f4 44.Qb7 Kg6 45.Rd1 fe3 46.Qc6 Kf5 47.Rd5 Kf4 48.Qd6) 44.c6 (44.Rd1 f4 45.Rd6 Kf7 46.Qf6 Kg8 47.Rd8 Kh7 48.Qf7) 44...Kh5 Black prepares g4 (44...g4 45.c7 g3 46.Rc6 Kh7 47.c8Q gf2 48.Kf2 f4 49.Qbb7) 45.c7 g4 (45...f4 46.Rc6 fe3 47.Qe2 Kh4 48.Rh6) 46.c8Q (46.Qf6 gh3 47.Qf5 Kh4 48.g3) 46...Kh4 (46...Kg6 47.Qe6 Kg5 48.Qbf6 Kh5 49.Qh6) 47.hg4 (47.Qf6 Kh5 48.Qcf5) 47...fg4 (47...Kg4 48.Qf6 h5 49.Qcf5) 48.Qg4! Kg4 (48...Kg4 49.Qe5 Mate attack) 49.Qe2 1–0. Fournier,Frederic (1935) – tiroles, Active Blind, 2007.

4.Nf3 e4 5.Nd4 d5 6.e3 Nf6 7.Be2 g6 8.0-0 Bg7 9.f4 ef3 10.Nf3 0-0 11.c4 Re8 12.cd5 Nd5 13.Bg7 Kg7 14.Nc3?? (better is 14.Qc1+=) 14...Nc3–+ 15.dc3 Qf6?? (better is 15...Qe3 16.Rf2 Qc3–+) 16.Qd2= Qe6? (better is 16...Qe7 17.Qd4 f6=) 17.Ng5+– Qe3?? (better is 17...Qd5!? 18.Rf7 Kg8 19.Qd5 cd5+–) 18.Qe3 Re3 19.Bc4?? (19.Rf7 Kg8 20.Bc4+–) 19...f6–/+ (19...Rc3?? 20.Rf7 Kh6 21.h4+–) 20.Nf3 Rc3 21.Rfc1 Rc1 22.Rc1 Bf5 23.Re1 Na6 (better is 23...Kf8–/+) 24.Re7= Kh6 25.Rb7 Nb8 26.Nd4 Be4 27.Re7 f5 28.Re8 c5 (28...a6!?+=) 29.bc5+/– Nc6?? (better is 29...Nd7 30.Ra8 Ba8+/–) 30.Ra8+– Nd4 31.Ra7 1–0. Fournier,Frederic – Neptuniano (1680), Active, 2007.

4.e3 c6 5.d3 Nf6 6.de4 Ne4 7.c4 d6 8.Nc3 Nc3 9.Bc3 Nd7 10.Ne2 Ne5 11.Qd4 Be6 (11...Bg4 12.Ng3=) 12.Nf4+= c5? (better is 12...Bf5!?+=) 13.bc5+– Qf6? (better is 13...Nc6 14.cd6 Qd7+–) 14.cd6 Rd8 15.Qe5 Qe5 16.Be5 f6 17.Ne6 Rd7 18.Nf8 Rf8 19.Bd4 (19...Rd6 20.Bc5+–; 19.Bg3 Kf7+–) 1–0. orane – malta4, internet, 2005.

4.e3 d5 5.d3 Bf5 (5...Nf6 6.de4 de4 7.Nd2=) 6.Ne2 (6.de4 de4 (worse is 6...Qe4 7.Nc3 Qe6 8.Nd5+/–; 6...Be4?! 7.Nc3+=) 7.Qd5 Bc8+=) 6...Bg4= 7.de4 Be2 (7...de4 8.h3 Be6 9.Nd4+=) 8.Qe2 (worse is 8.Ke2 de4 (worse is 8...Qe4 9.Nc3 Qg4 10.f3 Qc4 11.Kf2 Qh4 12.g3+–) 9.Nd2 Nd7=) 8...Qe4? (better is 8...de4 9.Qg4 Nd7+/–) 9.Nc3 Qe5 (9...Qe6 10.Qb5 Nc6 11.Qb7+– (11.Qd5?! Nf6 12.Qe6 fe6+–)) 10.Qb5 Nd7 11.Qb7 Nb6? (11...Rd8+–) 12.0-0-0 (12.Bb5 Ke7 13.0-0 Qd6+–) 12...Nf6 13.Nd5! Qb2 (13...Nbd5 A deflection 14.Qa8) 14.Kb2 Nfd5 15.Rd5 Rd8 (15...Bd6 16.Qc6 Ke7 17.Ra5+–) 16.Rd8 (better is 16.Bb5 Rd7 17.Rd7 Nd7 18.Qc7 Ke7+–) 16...Kd8 17.Bb5 (better is 17.Qb8!? Kd7+–) 17...Bd6 18.Qb8 Nc8 19.Rd1 Ke7 20.Qa8 Rd8 21.Kb3 c5 (21...f5 22.Ba6 Nb6 23.Qa7+–) 22.Qe4 Kf8 23.bc5 g6 24.Qh4 Ne7 25.cd6 Nf5 26.Qd8 Kg7 27.Qe8 Nh6 28.d7 1–0. Rosner,Dirk – Kientzler,Roland, corr SOK–89–37, 1989.

4.c4 Bg7 5.Nf3 (5.Nc3 Nf6=) 5...a5 (5...g4 6.Ng1=) 6.b5 (6.Nc3 d6+=) 6...b6 (6...g4 7.Ng1=) 7.d4 (7.Nc3 Bb7+=) 7...e4= 8.Ne5 (8.Ng1 e3=) 8...Be5 (better is 8...d6 9.Nc6 Nc6 10.bc6 e3+=) 9.de5+= d6?? (better is 9...e3+=) 10.ed6+– e3 (10...cd6 11.Bh8 e3+–) 11.de7 (11.de7 Ne7 12.Bh8+–) 1–0. GuestTRWH – GuestPJSV, freechess.org, 2017.

4.d4 d6 5.de5 de5 6.e4+=.

4.d4 e4 5.d5+= White gets in control 5...f6 (5...Nf6 6.d6 cd6 7.Nc3+=) 6.e3 Nh6 (6...Bg7 7.Nc3 d6 8.Bb5 Kd8 9.Nge2+=) 7.d6 (7.Nc3 d6+/–) 7...cd6 (7...Qd6!? 8.Qd6 Bd6 (8...cd6? 9.Nc3 Be7 10.Nd5+–) 9.Bf6 Rf8+/–) 8.Nc3+– Qe5 (better is 8...Bg7+–) 9.Rb1 Qf5 10.Nd5 Ng4 Threatening mate... how? 11.f3 ef3 12.Nf3 (12.Qf3!? Qc2 13.Rc1 Qb2 14.Rc8 Kf7 15.Qg4 Qa3+–) 12...Kd8 13.Be2 Nc6 (13...Ne5 14.0-0 Qe4 15.c4+– (worse is 15.Nf6 Qe3 16.Kh1 Be7+–)) 14.0-0 Ne7 (14...Qg6 15.Nd2 Nge5 16.Rf6 Qg7+–) 15.Ne7 Be7 16.Nd4 Ne3 (16...Qe4 17.Bg4 h5 18.Bh5+–) 17.Nf5 (worse is 17.Rf5 Nd1 18.Rd1 Re8+–) 17...Nd1 18.Bd1 d5 (18...Rg8 19.Bh5 d5 20.Rbe1+–) 19.Ne7 Ke7 (19...d4 20.Bd4 Rf8 21.Nd5+–) 20.Bf6 Kd6 21.Bh8 Kc7 (21...a5 22.Rf6 Ke7 23.Rh6+–) 22.Rf7 b5 (22...Kc6 23.Rh7 a5 24.Rh6 d6 25.Be5+–) 23.Be5 Kb7 24.Bf3 Kc6 25.Rf6 d6 26.Rd6 Kb7 27.Bd5 1–0. pierre (2210) – ketanmeh, internet, 2007.

4.e4 d6+=.

4.e4 d6 5.Nf3 Bd7 (5...Nc6 6.Nc3+=) 6.c4 (6.Nc3 f5+=) 6...a6 (6...f5 7.Nc3+=) 7.a4 (7.Nc3!?+=) 7...Nc6= 8.b5 Nb4 (8...Nd4 9.Nd4 ed4 10.Qe2=) 9.Ba3 a5 10.Be2 (10.Nc3 f5+=) 10...c6 (10...Qf6 11.Nc3=) 11.0-0+= c5 (11...Qf6 12.Nc3+=) 12.Nc3 Rd8?? (12...Be6 13.Re1+=) 13.Na2 (better is 13.Bb4 Ra8 14.Nd5+–) 13...f5 (13...Qf6=) 14.Nb4 (14.Nc3!? Qf7 15.Bc1=) 14...ab4+= 15.Bb2 Ra8 (15...fe4!? 16.Ne1 Be6+=) 16.d3 (16.ef5 Bf5 17.a5 Qd8=) 16...b6 (16...Qf6 17.Nd2+=) 17.Ne1 (17.Nd2 Qh4+=) 17...f4 18.g3 (18.Nc2 Qg5=) 18...Bh3 19.Ng2 Qg5 20.Bf3 Be7 21.Qd2? (21.gf4!? ef4 22.d4=) 21...0-0 (better is 21...fg3 22.Qg5 gf2 (worse is 22...Bg5 23.hg3 0-0 24.Bd1–/+) 23.Rf2 Bg5–+) 22.Rfd1?? (22.Qe2 Ra5+=) 22...Rf7 (better is 22...fg3 23.Qg5 Bg5–+) 23.Ne1 (23.Qe2 fg3 24.fg3 Bg4–/+) 23...Kf8 (23...fg3 24.hg3 Raf8 25.Qg5 Bg5 26.a5 ba5 27.Ra5 Rf3 28.Nf3 Rf3 29.b6–/+) 24.Bg2 (24.Qe2 fg3 25.fg3 Qf6–/+) 24...Bd7 (24...fg3!? 25.hg3 Bg4 26.Qg5 Bg5–/+) 25.Nf3+= Qg6 (25...Qh5 26.Rf1+=) 26.Qe2 (26.Be5 fg3 27.fg3 de5 28.Ne5=) 26...Ng8 (26...fg3 27.fg3 Kg8 28.Rf1+=) 27.Qf1 (27.Be5 fg3 28.Bg3 Bg4+=) 27...h5 (27...Bg4 28.Qe2+=) 28.Bc1 (28.Be5 h4 29.Qe2 fg3 (worse is 29...de5 30.Ne5 Qe6 31.Nf7 Qf7 32.e5+=) 30.fg3 h3= (30...de5 31.Ne5 Qe6 32.Nf7 Qf7 33.e5+–)) 28...Qh6 (28...fg3 29.fg3 h4 30.Qf2+=) 29.Bh3 (29.gf4 ef4 30.e5 Bg4+=) 29...Ra7 (better is 29...Bg4!? 30.Bg4 hg4+=) 30.Bd7 (30.a5 ba5 31.b6 Rb7 32.Bd7 Rd7 33.Ra5 Rd8+/–) 30...Rd7 31.Qh3 (31.Qg2+=) 31...Nf6 (31...Ke8 32.gf4 ef4 33.a5 ba5 34.Ra5 Qg6 35.Qg2 Qg2 36.Kg2=) 32.Nh4 (32.gf4 ef4 33.Qf5 Qh7+=) 32...g6 (32...Qg5!?+=) 33.a5 (better is 33.gf4 Ng4 34.f5+/–) 33...Ra7? (33...ba5 34.gf4 Ng4 35.f5+/–) 34.a6?? (34.ab6!? Rd7 35.b7 Rb7 36.Qc8 Ne8 37.Qb7 Bh4+–) 34...Ra8? (34...Nd7 35.gf4 ef4 36.d4+/–) 35.Kh1 (better is 35.gf4 Ng4 36.f5+–) 35...Ng4+= 36.Qf1. Trkn – Steve, itsyourturn.com, 2000.

4.g3 Qg5 5.Nf3 Qf5 6.Be5 f6 7.Bc7 Na6 8.Bf4 g5 9.Be3 g4 10.Nd4 Qe5 11.f4 Qd5 12.Nc3 Qc4 13.Bg1 Bg7 14.e4 Qf7 15.Ba6 ba6 16.Qe2 f5 17.e5 0-0 18.e6 de6 19.0-0-0 Bb7 20.Qe6 Bh1 21.Qf7 Nf7 22.Ne6 Rfc8 23.Ng7 Kg7 24.Bd4 Kg8 25.Rh1 Rd8 26.Bc5 Nd6 27.d3 Nb5 28.Kb2 Nc3 29.Kc3 Rd5 30.Kc4 Rdd8 31.d4 Kf7 32.Re1 Rd7 33.Re5 Kf6 34.c3 a5 35.b5 a6 36.b6 Rb8 37.a4 Rbb7 38.Bf8 Rb6 39.Ra5 Rc6 40.Bc5 Re6 41.d5 Re4 42.Bd4 Kf7 43.Ra6 Rc7 44.Kb5 Rb7 45.Kc6 Rbe7 46.d6 Re8 47.d7 R4e6 48.Kb7 Ra6 49.de8Q Ke8 50.Ka6 Kd7 51.Be5 Ke6 52.c4 1-0. whichofh – Prins, Rated Classical game, lichess.org.

4.e3 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Qb4 8.Be5 Nh6 9.Nf3 Ng4 10.h3 Ne5 11.Ne5 d6 12.c3 Qe4 13.Nf3 Be7 14.Be2 Bf6 15.0-0 0-0 16.d4 Bh3 17.gh3 Qg6 18.Kh1 Qh6 19.Kh2 g5 20.Ng1 d5 21.Nd2 Re8 22.Bg4 Bg7 23.Qe2 Qd6 24.Kh1 c6 25.bc6 Nc6 26.f4 gf4 27.Rf4 Na5 28.e4 Qf4 Normal 0-1. MonkeyDonnut - humble1, Rated Classical game, lichess.org, 2016.

4.e3 Qb4 5.Ba3 Qa5 6.Bf8 Kf8 7.Nc3 (7.Qh5 d6+=) 7...Nf6 8.Bd3 (8.Bc4 d6=) 8...g6 (better is 8...d5!?=+) 9.Nf3 Kg7 (better is 9...d6+=) 10.Ne4 (better is 10.Ne5 d6 11.Nc4+/–) 10...Ne4=+ 11.Be4 d6 (11...f5 12.Bd5 Qb5 13.Bb3–/+) 12.Ng5 Qb5 13.d3?? h6 14.a4?? Qb4 (15.Qd2 Qd2 16.Kd2 hg5–+) 0–1. pinecrest1981 – Freud, Live Game Caissa's Web, 2004.

4.e3 Qe7 5.d4 d6 6.Nf3=.

4.e3 Nf6 5.Ba3 Qd5 6.Nc3 Qe6 7.Bf8 Rf8 8.Nf3 d5 9.d4 Nbd7 10.Ng5 Qf5 11.de5?? (better 11.Nf3=) 11...Qe5-+ (11...Qg5?! 12.ef6 Nf6 13.Qd4=) 12.Nd5 Qd5 (better 12...Nd5 13.Nf3 Qc3 14.Nd2 Ne5-+) 13.Qd5-/+ Nd5 14.Bc4 (14.Nh7!? Rh8 15.Ng5-/+) 14...N5f6-+ 15.0-0 Ne5 16.Bb3 Bd7 17.a4 0-0-0 (better 17...h6 18.Nf3 Nf3 19.gf3 Rd8-+) 18.f4-/+ Neg4 19.Nf7? (19.e4 Be8 20.h3 Nh6-/+) 19...Rf7! (19...Ne3?! 20.Nd8 Nf1 21.Ne6-/+) 20.Bf7 Ne3 21.Rf2 Rf8 (21...c6!?-/+) 22.Bb3=+ Bf5 (22...c6 23.Re1 Nf5 24.bc6 Bc6 25.Be6 Bd7 26.Bd7 Kd7 27.Rd2 Nd6 28.Rd4=+) 23.Re1 (23.Re2!? Ned5 24.Re5+/-) 23...Neg4 24.Rfe2 h5 25.h3 (25.Re7 h4+=) 25...Nh6= 26.Re7 g6 27.c4 (27.a5 Bd7+=) 27...Nf7 (27...Rd8 28.c5=) 28.Rc1 (28.c5 Nd8+=) 28...Nd6 29.c5 Nde4 30.Bc2 Nd5 (30...Ng3 31.Bf5 Nf5 32.Re5=+) 31.Re5 (31.Re4 Be4 32.Be4 Nf4+=) 31...Ndf6 (31...Nf4 32.Rf1 (32.Re4?? Be4 33.Be4 Ne2 34.Kh2 Nc1-+) 32...Ne2 33.Kh2-/+) 32.Re1 (better 32.Be4 Be4 33.Kf2=) 32...Re8?? (better 32...Ng3 33.Bb3 h4=) 33.Re8+- Ne8 34.Be4 (34.Re4?! Be4 35.Be4 Nf6 36.Bg6 c6+-) 34...Be4 35.Re4 Nf6 36.Re6 Nd5 37.g3 Nc3 38.Rg6 Ne2 (38...Na4 39.c6 bc6 40.bc6+-) 39.Kf2 Nd4 (39...Nc3 40.c6 bc6 41.Rc6 Na4 42.f5+-) 40.Rh6 Nf5 (40...c6 41.bc6 Nc6 42.Rh5+-) 41.Rh5 (better 41.Rh8 Kd7 42.Rh5 Ne7+-) 41...Ng7 (41...Nd4+-) 42.Rh8 Kd7 43.Rh7 1-0. kasperoff (1780) - great_cornhorio (1800), Hourly Rapid Arena, lichess.org, 2019.

4.Be5 d6 5.Bc3 Qa4 6.Bd4 Bf5 7.Qf3 Qc2 (7...Bc2?? 8.Qb7 a6 9.Qa8+–) 8.Na3 Qe4 9.Nb5 Qf3 10.Nf3 Kd8 11.Ba7 Nc6 12.Nbd4 Nb4 (12...Na7?! 13.Nf5 g6 14.Ng3 +=.

4.Be5 d6 5.Bc3 Qa4 6.Nf3 Nc6 7.d4 (7.Be2 Bf5=) 7...Nf6 (7...d5!?=) 8.d5+= Nb4 9.Bf6 gf6 10.Nd4 a6 11.Nc3 Qa5 12.Nb3 Qa3 13.Bd3 Rg8 +=.

4.Be5 Qe7 5.Bc7 Qc5 6.Bg3 Qb4 7.Nc3 g6 8.Nd5 Qa3 9.Nc7 Kd8 10.Na8 Bg7 11.Bb8 Ba1 12.Qa1 f6 13.Bc4 Qe7 14.Ba7 Nh6 15.Bb6 Ke8 16.Nc7 Kf8 17.Nd5 Qe6 18.Qf6 Qf6 19.Nf6 Nf5 20.Bc7 b6 21.Be5 Ng7 22.Bd6# 1–0. Bonetti,Shane (2157) – guest671, ICC, 2002.

4.Be5 f5 5.a3 Qa5 6.Bc3 Qb6 7.Nf3 d6 8.Be2 Bd7 9.0-0 Nc6 10.d4 Nf6 11.Nbd2 Nd5 12.Bb4 Ndb4 13.ab4 Qb4 14.Rb1 Qa5 15.Rb7 Rb8 16.Rb8 Nb8 17.Nc4 Qa4 18.Qb1 Na6 19.Qb2 Be7 20.Ra1 Qc6 21.Nd6 Bd6 22.Ra6 Qa6 23.Ba6 Normal 1-0. iamdudum (1750) - sasanx (1640), Rated Classical game, lichess.org, 2015.

4.Be5 f6 5.Qh5 g6 6.Qf3 fe5 7.Nc3 Bg7 8.Rb1 Qd6 9.Rb7 Nc6 10.Nb5 Bb7 11.Nd6 cd6 12.e4 Nf6 13.Bd3 0-0 14.Qh3 Bc8 15.Nf3 Rb8 16.0-0 d5 17.Ng5 de4 18.Be4 d5 19.Bf3 Bh3 20.Nh3 e4 Normal 0-1. nikSAMARA – leogalhardo, Rated Blitz game, lichess.org, 2015.

4.a3 d5 5.Nf3 f6 (5...Nd7 6.Be2=) 6.Be2 h6 (6...a5 7.ba5 Ra5 8.d4=) 7.h3 (7.Nh4 Qd6+/-) 7...Be6 8.d3 (8.Nh4 Bf7+=) 8...Bf7 (8...Qf7 9.0-0=) 9.0-0+= Nd7 10.c4 Qd6 11.cd5 Bd5 12.Nc3 Bf7 13.b5 (13.d4 Qe6+/-) 13...c5 (13...cb5 14.Rc1 (worse 14.Nb5 Qb6-/+) 14...a6 15.Ne4=) 14.a4 Ne7 15.a5 Nf5 16.Ne4 Qb8 (16...Qd5 17.Qc2+=) 17.b6 (17.d4 cd4 18.ed4 Nd6+/-) 17...a6? (better 17...ab6!? 18.ab6 Nb6=) 18.Qa4 Qc8 (18...Bd5 19.Ba3+/-) 19.Rac1 Be7 (19...Bd5 20.Ba3+/-) 20.d4 (20.g4 Nd6 21.Nc5 Qc6 22.Qc6 bc6 23.Nd7 Kd7 24.Be5 fe5 25.Ne5 Ke8+-) 20...ed4 21.ed4 0-0 22.dc5 Bd5 (22...Nc5 23.Nc5 Bc5+-) 23.Bc4 Bc4 24.Rc4 (24.Qc4 Kh8 25.g4 Ne5 26.Ne5 fe5 27.gf5 Qf5+-) 24...Kh8 (24...Ne5 25.Be5 fe5 26.c6+-) 25.c6 (25.g4!? Ne5 26.Ne5 fe5+-) 25...bc6 26.Rc6 (better 26.g4 Nb8 27.gf5 Qf5+-) 26...Qd8 (26...Qe8 27.Re1+-) 27.Rd1 (27.Rc7!? Ne5 28.Be5 fe5 29.Ne5 Rc8 30.Ng6 Kh7 31.Nf8 Qf8+-) 27...Qe8 28.Rc7 (better 28.g4 Rd8 29.gf5 Nb6 30.Rd8 (30.ab6?! Rd1 31.Kg2 Rb1+-) 30...Na4 31.Re8 Re8 32.Bc1+-) 28...Qd8 (28...Ne5 29.Qb3 Nf3 30.Qf3 Qb5+-) 29.Rdd7 (29.Rcd7 Qe8 30.g4 Qg6+-) 29...Qe8 30.Qc4 Rf7 (30...Bd8 31.Rb7+-) 31.Ba3! Rd8 (31...Ba3 32.Qb3 Double attack (32.Rf7 Pinning; 32.Rf7 Deflection; 32.Qb3 Decoy)) 32.Re7! Re7 (32...Ne7 33.Nd6 Combination; 32...Re7 33.Be7 Decoy) 33.Be7 Ne7 34.Nc5 (34.b7 f5 35.Ne5 Qg8 36.Nf7 Kh7 37.Nf6 gf6 38.Nd8 Qc4 39.Rc4 Nc6 40.Rc6 Kg6 41.b8Q Kh5 42.Qg3 f4 43.Qg4) 34...Nd5 35.g3 (better 35.Nb7 Ne3 36.fe3 Qe3 37.Kh1+-) 35...Nc7 36.bc7 Rc8 37.Na6 Qe7 (37...g6 38.Qf4 Kg7 39.Nc5+-) 38.Kg2 (38.Qg4 Qe8+-) 38...Kh7 (38...Qe8 39.Qg4+-) 39.Nh4 g6 (39...Qd7 40.Qe4 Kg8 41.Nf5+-) 40.Qd3 Qe6 (40...f5 41.Nf5! Qe8 42.Nd6 Qc6 43.f3+-) 41.Qg6 Kh8 42.Qh6 (better 42.Nf5 Qd7+-) 42...Kg8 43.Qg6 Kf8 44.Qd3 Qc6 (44...Ke8 45.Nf5 Qc6 46.Kh2 Rc7 47.Nc7 Qc7 48.Qe3 Kf7 49.a6+-) 45.Nf3 (better 45.Kh2 Rc7 46.Qd8 Qe8 47.Qf6 Kg8 48.Nc7 Qd7 49.Qg5 Kh8+-) 45...Kf7 46.Qd8 (better 46.Kh2 Rh8+-) 46...Qa6 47.Qd7 Kg6 (47...Kg8+-) 48.Nh4 Kh6 49.Nf5 Kg5 50.Ne7 (50.h4 Kg6 51.h5 Kh5 52.Qh7 Kg5 53.f4 Kg4 54.Qg6) 50...Qb7 51.Kh2 Rc7 (51...Qf3 52.Qd2 Kh5 53.g4 Qg4 54.hg4 Kg4 55.Qe2 Kg5 56.Qe3 Kg4 57.Qe4 Kg5 58.Qf5 Kh4 59.Ng6) 52.Qf5 (52.Qf5 Kh6 53.Qg6) 1-0. Abdullaevich (1870) - soybatman74 (1840), lichess.org, 2020.

4.a3 d5 5.Nf3 Bg4 6.Be2 f6 7.h3 Bh5 8.0-0 Nd7 9.d4 e4 10.Nfd2 Bf7 11.c4 f5 12.cd5 Bd5 13.Bc4 Ngf6 14.Bd5 Nd5 15.Nc3 N7f6 16.Nd5 Nd5 17.Nc4 0-0-0 18.Ne5 g5 19.Qc2 Qc7 20.b5 Ne7 21.bc6 Nc6 22.Nc6 Qc6 23.Qc6 bc6 24.d5 Rg8 25.dc6 Kc7 26.Rfc1 Rg6 27.Be5 Bd6 28.Bd6 Rgd6 29.Rab1 Rc6 30.Rc6 Kc6 31.a4 Rd7 32.Rb5 Rb7 33.Rf5 Rg7 34.f3 ef3 35.gf3 h5 36.Kf2 g4 37.hg4 hg4 38.fg4 Rg4 39.Kf3 Ra4 40.Rf6 Kd5 41.Rf5 Ke6 42.e4 Ra3 43.Kf4 a5 44.Rg5 a4 45.e5 Ra1 Time forfeit 0-1. ekevu (1660) - baraa (1755), Rated Blitz game, lichess.org, 2016.

4.b5= Nd8 5.c4 f6 (5...Nf6 6.Be2=) 6.Nc3+= Ne6 7.Nf3 g6 (7...a6 8.Be2+=) 8.d4 (8.Be2 g5+/–) 8...d6 (8...ed4 9.Nd4 Qb4 10.Rb1+=) 9.Bd3+/– Bg7 10.0-0 Nh6 (10...Qf7 11.Re1+/–) 11.Nd5 (11.a4 f5 12.Nd5 Qf7 13.de5 Ng4+/–) 11...Qf7+= 12.Qa4 (12.a3 0-0+=) 12...0-0 13.Rac1 (13.Rab1 a6+=) 13...Rd8 (13...Bd7 14.Qa5+=) 14.Rfe1 (14.Qc2 Re8+=) 14...Kh8 (14...f5 15.Be2+=) 15.Qa3 (15.Qc2 Re8+/–) 15...b6 (15...Re8 16.Rb1+/–) 16.h4 (16.Nb4 Bb7 17.Nc6 Bc6 18.bc6 Ng5 19.Ng5 fg5+=) 16...a5 (16...a6 17.e4+=) 17.Bc2 (17.Qa4 Ng4+=) 17...Ng4 (17...Bb7 18.h5+=) 18.h5 g5 19.Rcd1 Re8 20.Qb3 f5 (20...Qh5 21.Bf5=) 21.de5 Nc5 22.e6 Ne6 (22...Be6 23.Ng5 Qh5 24.Bg7 Kg8+/–) 23.Nh2 (23.Bg7!? Kg7 24.Qb1+/–) 23...Nh2 (23...Ne5 24.h6 Bh6 25.e4=) 24.Bg7 (24.h6 Nf3 25.gf3 Be5+/–) 24...Kg7 (24...Ng7 25.Kh2 Qh5 26.Kg1=) 25.Qc3+= Kh6 26.Kh2 Qh5 27.Kg1 Qf7 28.g4 (better is 28.e4!? Nf4 29.Nf4 gf4 30.e5+/–) 28...fg4=+ 29.Nf6 Rf8 30.Ng4 Kh5 31.Rd6?? (31.Be4 Ra7 32.f3+–) 31...Kg4 (better is 31...cd6 32.Bd1 Qe7–+) 32.f3 +=. Rohde,Friedhelm – Ziese,Gerhard, corr 2.KGP–Z–01, 1994.

4.b5 Nd8 5.d4 ed4 6.Bd4 Nf6 7.Nf3 d5 (7...Ne6 8.c3=) 8.Be2 (8.Nc3 c6+=) 8...Bg4 (8...Ne6 9.Bb2=) 9.0-0 (9.Nc3 c6+=) 9...Ne6= 10.h3 (10.Nbd2 Nd4 11.Nd4 h5+=) 10...Bf3 11.Bf3 Nd4 12.Qd4 b6 (better is 12...Qc5!?=) 13.Bd5 (13.Nc3 0-0-0 14.Rad1 Qe6 15.Nd5 Bd6+–) 13...0-0-0 14.c4 (14.Nc3 Qa3 15.Rfb1 Bd6+/–) 14...Nd5 (14...g5 15.Nc3+/–) 15.cd5 Qg5 (15...Qc5 16.Qc5 Bc5 17.Rd1+–) 16.Nc3+– Be7 (16...Ba3 17.Qc4+–) 17.Rac1 Bc5 18.Qc4 Rhe8 19.Ne4 (19.Rc2!? Qe5+–) 19...Qd5+/– 20.Nc5 Qc5 (20...Qc4 21.Rc4 bc5 22.Rc5+/–) 21.Qc5 (21.Qa4!? Qd5 22.Rfd1 Qb7+–) 21...bc5+/– 22.Rc5 Rd2 23.a4 Kb7 24.Rfc1 Re7 25.a5 Rb2 (25...Red7 26.Rc6+/–) 26.a6 Kb6 27.Rc6 Kb5 28.R1c5 (28.Rc7?! Rc7 29.Rc7 Ka6 30.Rf7 Rb1 31.Kh2 Rb7+/–) 28...Kb4 29.Rc4 (better is 29.Rc7!? Re6 30.Rc1 Ra6 31.Rf7+–) 29...Kb5+/– 30.Kf1 (30.g4!? Re6 31.R4c5 Kb4 32.Rc7 Ra6 33.Rf5 Ra1 34.Kg2+–) 30...Rd7= 31.R4c5 Kb4 32.Rc1 (32.g4 Rdd2 33.Rf5= (worse is 33.Rc7 Rf2 34.Kg1 Rg2 35.Kf1 Rbf2 36.Ke1 Ra2–/+)) 32...f6?? (better is 32...Rdd2 33.Rc7 Rf2 34.Ke1 Kb5 35.R1c5 Ka4 36.Rc4 Kb3 37.Rc3 Ka2 38.Ra7 Rg2=) 33.Rc7+– Rdd2 34.R7c4?? (better is 34.Rb7 Ka5 35.Ra1 Ra2 36.Ra2 Ra2 37.Ra7+–) 34...Kb5+= 35.Rf4 Ka6 36.Ra1 Kb6 37.g4 a5 38.Rf5 Ra2 39.Rb1 (39.Ra2 Ra2 40.g5 fg5 41.Rg5 g6+=) 39...Rdb2 40.Rb2 Rb2 41.Ke1? (better is 41.Rd5 a4 42.Rd3–/+) 41...a4–+ 42.Kd1 a3 43.Kc1 Rb3 (43...Rb3 44.Kc2 a2 45.Kb3 a1Q–+) 0–1. gtate (1765) – nerob (1740), net–chess.com, 2002.

4.b5= Nd8 5.Nf3 e4 6.Nd4 Ne6 =.

4.a3 d5 5.c4 Nf6 6.cd5 Nd5 7.d4 ed4 8.Bd4 Nc6 9.Nc3 Be6 (9...Nd4? 10.Nd5 (10.Qd4?! Nf6=) 10...Qd6 11.Qd4+– (< 11.ed4 Qd5 12.Nf3 Bd6=+)) 10.Nf3 Nd4 11.Qd4 Nc3 12.Qc3 0-0-0 13.Bd3 (13.Nd4 f4+=) 13...f4 (13...g6!?=) 14.0-0+= fe3 15.fe3 Bd5 (15...Qf6 16.Qf6 gf6 17.Nd4+=) 16.Rae1 h5 (16...a5 17.Bf5 Kb8 18.Rc1+/– (< 18.ba5 Qa3 19.Qe5 Bb4=)) 17.Ne5 Qg5? (17...Rh6 18.Bf5 Kb8 19.e4+/–) 18.e4 (better is 18.Bf5!? Kb8 19.e4+–) 18...Be6+/– 19.Nf7 Bf7 20.Rf7 Be7 21.e5 Rhf8 (22.e6 Bd6+/–). Psion – Psion, 4 Min/Zug, 1991.

4.b5 (--> 3.b5 f5 4.e3).

4.c4 Nf6 5.a3 d6.

4.a3 Nd7 5.Nf3 h6 6.Bc4 c6 7.c3 g5 8.d3 Qf6 9.Nbd2 Ne7 10.Qb3?? (10.0-0 Rg8+=) 10...Ng6?? (10...g4 11.Ng1 b5 12.Bf7 Qf7 13.Qf7 Kf7 14.a4-+) 11.Nf1? (better 11.d4=) 11...g4 12.N3d2 h5?? (12...b5!? 13.Bb5 cb5 14.c4-+) 13.Ne3? (13.Qc2 Nb6=+) 13...Nf4 (13...b5 14.Bb5 cb5 15.Nd5-+) 14.g3 (better 14.d4=) 14...Nh3-+ 15.Nf5 (15.f3 b5-+) 15...Nb6 (15...d5 16.ed5 Qf5 17.Rf1-+) 16.a4? (better 16.d4 Bf5 17.ef5 Qf5 18.Rf1-+) 16...Bf5 (16...Nc4?! 17.Nc4 Bf5 18.ef5 Qf5 19.Qc2-+) 17.ef5 Qf5 (17...Nc4?! 18.Nc4 Qf5 19.Qc2-+) 18.Ne4 (18.a5 Nc4 19.Qc4 Qf2 20.Kd1-+) 18...d5 19.Bd5 (19.Rf1 Nc4 20.Bc1 0-0-0-+) 19...cd5 20.a5 (20.Qc2 Qf3 21.Rf1 de4 22.de4 Ng5-+) 20...de4 21.Rf1 ed3 22.ab6 (22.0-0-0 Rd8 23.Kb1 Nd5-+) 22...d2 (22...Qf3 23.Qa4 Ke7 24.Qc2 Qe4 25.Kd1 dc2 26.Kd2 Bh6 27.f4 gf3) 23.Kd2 (23.Kd1 Qd3 24.Qa4 Ke7 25.Qa5 Qf1 26.Kc2-+) 23...0-0-0 24.Ke1 (24.Qd5 Rd5 25.Kc1 Bh6 26.f4 gf3) 24…Qe4 0-1. alessandrocarvalhaes (1865) - FA9024 (1850), lichess.org, 2020.

4.b5 Bd7 5.a4 a6 6.Nf3 ab5 7.ab5 Ra1 8.Ba1 c6 9.c4 cb5 10.cb5 Nf6 11.d3 g6 12.Nc3 Bg7 13.Qa4 0-0 14.Qa7 Bg4 15.Qb7 Qb7 Normal 0-1. mohammadaliii (1745) - juanchi10 (1960), Rated Classical game, lichess.org, 2015.

4.e4 b6 5.Bc4+= Bb7 6.Qe2 Nc6 7.a3 0-0-0 8.0-0 g5 (8...Nf6 9.Qd3+=) 9.Rd1 (9.Nc3!? g4 10.Nd5+/–) 9...g4= 10.Ne1 Nf6 11.Nc3 Bh6 (better is 11...Nd4!? 12.Qe3 Bg7=) 12.Nd5+/– Nd5 13.ed5 Nb8 14.a4 Rhg8 15.a5 b5 16.Bb5 Bd5 17.c4 (17...Be6 18.d4+=). supertimchan (2075) – pauldopson, net–chess.com, 2004.

4.e4 Nf6 5.Nc3 =.

4.e4 Bg4 5.h3 Bf3 (5...Bh5 6.Nc3=) 6.Qf3+= Qf6 7.Qd3 Ne7 8.Nc3 c6 9.Be2 Na6 10.a3 Ng6 11.g3 Rd8 (11...Be7!?+=) 12.Qe3+/– Nc7? (better is 12...Ra8+/–) 13.Qa7+– Be7 (13...d5 14.Qb7 Qd6+–) 14.Qb7 Nb5 (14...Ne6 15.Qc6 Kf8+–) 15.Qc6 (15.Qc6 Kf8 16.Qb5+–) 1–0. pierre – oppo, internet, 2010.

4.Nd4 Qb4 5.Nb3 Qe7 –/+.

4.Nd4 Qb4 5.Bc3 Qc5 –/+.

4.Nd4 Qb4 5.Bc3 Qe7 6.d3 Nf6 7.Nf5 Qe6 8.de4 Qe4 9.Ng3 Qe6 10.e3 Nd5 11.Bb5 (11.Bb2 Nc6–/+) 11...Nc3 12.Nc3 c6 13.Ba4 Qe5 14.Qd3 (14.Qd4 Qd4 15.ed4 Kd8–/+) 14...Bb4–+ (15.Nge2 b5–+). 0–1, Kellerer,Horst – Mrkvicka,Josef, CiF, 1999.

4.Ne5 Qb4 5.e3?? (better is 5.Bc3 Qc5 6.e3=+) 5...Qb2–+ 6.Nc3 Qb6 (6...Nf6 7.Rb1 Qa3 8.Bc4–+) 7.Rb1 Qd6 8.Nc4 Qe7 9.Qg4 d5 10.Na5?? Bg4–+ (11.Rb7 Qa3–+) 0–1. wach – WyleECoyote, Caissa.com, 2004.

4.Ne5 f6 5.Nc4 d5 –/+.

4.ba5 Nc6 5.Nc3 Nf6 6.e4 Qd8 7.Nf3 Ra5 8.Bb5 Bc5 9.Bc4 d6 =+.

4.ba5 d5 5.e3 Nf6 6.h3 Qe6 7.d4 e4 (worse is 7...Ra5 8.de5 Ne4 9.Ne2+=) 8.Nd2 Bd6 9.Bb5 c6 10.Ba4 (10.Be2!?+=) 10...Ra5–/+ 11.Bb3 b5 12.a4 Qf5 13.ab5 Ra1 14.Qa1 Qg5 15.g3 cb5 16.Ba3 Ba3 17.Qa3 Bd7 18.Qa8 (18.Ne2 Bc6 19.Nc3+/–) 18...0-0+= 19.Ne2 Nc6 20.Qb7 Rb8 21.Qc7 (21.Qa6 b4+=) 21...Ra8–/+ 22.Kf1 (22.c3!?–/+) 22...Qh5–+ 23.g4 (23.Nc3 Rc8 (23...Bh3?! 24.Ke1+=) 24.Qb6 b4–/+) 23...Bg4! 24.Qc6?? (24.hg4 Qh1 Pinning (24...Qh1 Deflection; 24...Ra1 Decoy)) 24...Ra1 25.Kg2 (25.Nb1 Rb1 26.Nc1 Rc1 27.Kg2 Bf3 28.Kh2 Rh1 29.Kg3 Qg5) 25...Bf3 26.Nf3 (26.Kh2 Rh1 27.Kg3 Qg5) 26...Qf3 0–1. Stiller – Alissa (2365), ChessWorld.net, 2003.

4.b5 d6 5.e4 (5.Nc3=) 5...Bd7 (better 5...Nf6!? 6.Nc3 Nbd7=) 6.Nf3+– Nf6 7.Nc3 Be6 8.Be2 d5 (8...Nbd7 9.d4+–) 9.ed5 (9.Nd5 Bd5 10.ed5 e4+–) 9...Bd5 (9...Nd5!? 10.Nd5 Bd5+–) 10.0-0 e4 (10...Nbd7 11.Nd5 Nd5 12.Ne5 Ne5 13.Re1+–) 11.Nd5 Nd5 12.Bd3! ed3 (12...f5 13.Re1 Nb6 14.Nd4+–) 13.Re1 Qe1 (13...Nd7+–) 14.Qe1 Ne7 15.cd3 Nbc6 (15...Nd7 16.Rc1 Rc8+–) 16.bc6 (16.bc6 bc6 17.Qe4+–) 1–0. Pierre – Hulaiko, internet, 2020.

4.Nc3 Nf6=+ 5.Nb5 d5 6.ba5 (6.f4 Ng4 (< 6...ab4 7.Be5 Ra3 8.Bc7+/–) 7.fe5 Ne5=+) 6...Ra5 7.e3 c6 8.Nc3 Bg4 9.Be2 Qe6 10.Nf3 Bd6 11.h3 Bf3 12.Bf3 Nbd7 13.e4 (13.Be2 0-0–/+) 13...d4–/+ 14.Ne2 0-0 15.Ng3 Rfa8 16.Qb1 Nc5 17.d3 Rb5 (17...b5 18.Nf5–/+) 18.Qa2 Qa2 19.Ra2 Na4 20.Ba1 Nb6 21.Bb2 Rba5 22.0-0 Ba3 23.Ba3 Ra3 24.Rb2 Nfd7 25.Rfb1 Ra1 26.Bg4 R8a2 (26...R8a7 27.Ra1 Ra1 28.Kh2–/+) 27.Ra2 (27.Bd7 Rb2 28.Ra1 Nd7 29.Ra8 Nf8–/+) 27...Rb1 (27...Ra2?! 28.Bd7 Nd7 29.Rb7=) 28.Kh2 g6 29.h4 Nc5 30.h5 Kg7 31.Ne2 Nba4 32.hg6 (32.f4 Kf6–/+) 32...hg6 33.f4 Kf6 (34.g3 b5–/+) 0–1. Pagni,Carlo – Trigance,Eric, corr ICCF TT–4–90–SF1, 1990.

4.e3 Nf6 5.Ne2 ab4 6.ab4 Ra1 7.Ba1 d5 8.Bc3 Ne4 9.b5 Qf6 10.f3 Nc3 11.Nbc3 Be6 12.Qa1 Bb4 13.Qa8 =.

5.e4 Nf6 6.Nf3 Ne4 7.Qe2 Ng5 8.Ne5 f6 9.Nc4 Ra6 10.Nc3 Re6 11.Ne3 Qd8 12.f4 Nf7 13.f5 Re5 14.d4 Re7 +/–.

5.Nf3 Nc6 6.e4 d6 7.Bc3 Ra8 8.Bb5 Bd7 9.Bc6 Bc6 10.d3 Nf6 11.0-0 g6 12.h3 Bg7 13.g4 (13.Bd2 0-0=+) 13...0-0 14.Nbd2 Nd7 15.Re1 Rfe8 16.Qb1 Ra6 17.Nc4 Rea8 18.Bb2 Bb5 (18...f5 19.gf5 gf5 20.Ncd2-/+) 19.Ne3=+ Bc6 (19...Nb6 20.c4 Bd7 21.Qc2-/+) 20.Nd5 (20.Nc4 f5 21.gf5 gf5 22.Ncd2-/+) 20...Bd5-/+ 21.ed5 Nb6 22.c4 Na4 23.Bc1 b6 (23...Qd8 24.Bg5 Bf6 25.Bf6 Qf6 26.Re3-/+) 24.Qc2 (24.d4 Re8=) 24...Nc5 25.d4 Nd7 26.de5 Ne5 27.Ne5 Be5 28.Re5? (28.Bb2!? Qg5 29.Be5 de5 30.Qc3=) 28...Qe5 (better 28...de5!? 29.Qc3 Qh4-+) 29.Bb2-/+ Qe7 (29...Qg5 30.Re1 Rf8 31.Qc3=) 30.Qd2 (30.Qc3 f6 31.Re1 Qd8=) 30...Ra4 (30...Re8!?-/+) 31.Re1=+ Qf8 32.Qd4 f6 33.g5 Qg7?? (better 33...c5 34.dc6 R8a7+=) 34.gf6+- Qf7 35.Re7 Rc4 (35...Rf8 36.Rc7!! Qf6 37.Qf6 Rf6 38.Bf6 Ra3 39.Rg7 Kf8 40.Rh7 Rb3+-) 36.Qc4 Qe7 (36...b5 37.Qc6 Rb8 38.Rf7 g5 39.Rg7 Kf8 40.Qc7 b4 41.Qb8) 37.fe7 (37.fe7 g5 38.Qe4 Kf7 39.e8Q Re8 40.Qh7 Kf8 41.Qg7) 1-0. beatmeeasy (1935) - NIXAU (1930), lichess.org, 2020.

5.Nc3 Nf6 6.g3 (6.e4 d6=) 6...Ng4 (6...d5!?+=) 7.Bg2 Qf6 (7...c6 8.e4 Nf6 9.Nge2+=) 8.Nf3 (8.f3 Nh6+=) 8...Qb6 (better is 8...e4!? 9.Bh3 h5 10.Bg4 hg4=) 9.0-0+/– d6 10.Rb1 (10.Nd5 Qc5 11.e4 Kd8+/–) 10...Bd7 (better is 10...Nf6!?+=) 11.Nd5+/– Qc5 12.Nc3 d5?? (better is 12...Qb6!?=) 13.h3 (13.Ne5!? Nf6+–) 13...e4+/– 14.d4 Qd6 15.Ne5 (15.hg4 ef3 16.Bf3 Be6+/–) 15...Ne5? (better is 15...Nh6=) 16.de5+– Qe6? (better is 16...Qe5 17.Ne4 Qf5+/–) 17.Nd5 (17.Qd5?! Qd5 18.Nd5 Kd8+–) 17...Ra7 (17...Kd8+–) 18.Nc7 Kd8 19.Ne6 Ke7 20.b6 (better is 20.Qd6 Ke8 21.Qb8 Ke7+–) 20...Ra5 21.Bc3 (better is 21.Qd6 Ke8 22.Qb8 Ke7 23.Nf8 Rd5 24.Qb7 Rf8 25.Qd5 Rd8 26.Qd6 Ke8+–) 21...Rb5 22.Rb5 (better is 22.Qd6 Ke8 23.Qb8 Ke7 24.Nf8 f5 25.Qd6 Kf7 26.Qd7 Kf8 27.e6 Rb1 28.Qf7) 22...Bb5 23.Qd6 Ke8 24.Qd8 1–0. nimzomorph – West Islander, ChessWorld.net, 2011.

5.e4 f6 (5...Nf6 6.Nc3=) 6.Bc4 (6.Nc3 Qd6+–) 6...c6 (6...Qc5 7.Qh5 g6 8.Qe2+=) 7.Qh5 (7.Nc3 f5+=) 7...g6+= 8.Qe2 cb5 (8...Qc5!?+=) 9.Bb5+– Nc6 10.Nf3 Qc5 11.Nc3 Nd4 (11...Ra5!?+–) 12.Nd4+– ed4 13.Na4 Qc2 14.Rc1 Qb3 15.Qc4 (worse 15.Bd4 Ba3 16.Qc4 Qc4 17.Rc4 Kf7+–) 15...Qc4 16.Rc4 (16.Bc4?! Ra4 17.Bg8 Rg8 18.Rc8 Kf7+=) 16...Ne7 (16...Rb8 17.Nb6 (17.Rd4?! Kf7+–) 17...Ne7 18.Bd4+–) 17.Nb6 Ra5 (17...Rb8 18.Bd4 Nc6 19.Bf6 Rg8+–) 18.Nc8 (18.Rc8?! Nc8 19.Bd7 Kd8 20.Bd4 Nb6 21.Bb6 Kd7 22.Ba5 Ba3+–) 18...Rb5 (18...Nc6 19.a4 Kf7 20.Nb6+– (worse 20.Bd4 d5 21.Bc6 dc4 22.Bd5 Kg7+–)) 19.Nd6 (19.Nd6 Kd8 20.Bd4 Rb1 21.Ke2+–) 1–0. DEFFM – XXAXX, freechess.org, 2018.

5.d4 ed4 6.Qd4 Nf6 7.Nf3 g6?? (better is 7...Bb7=) 8.Qf6+– Rg8 9.Qe7 Be7 10.e3 c6 11.Nbd2 Bb7 12.Bd3 f5 13.Bc4 d5 14.bc6 Bc6 15.Bd3 Nd7 16.Nd4 Ba4 17.Ne6 Kf7 (17...Rc8 18.Nf4 Bc6 19.Ba6+–) 18.Nc7 1–0. gurudela (1735) – spensley, gameknot.com, 2013.

5.e3 a4 6.Nf3 (6.d4 e4+=) 6...d6 (6...e4 7.Nd4=) 7.Be2 (7.c4 Bg4+=) 7...Nd7 (7...e4 8.Nd4+=) 8.0-0 Nh6 (8...Ngf6 9.c4+=) 9.Nc3 (better is 9.c4+/–) 9...Nc5? (better is 9...Bb7!?+=) 10.Nd5 (10.d4 ed4 11.ed4 Ne4+–) 10...Qd7 11.d4 e4?? (11...ed4!? 12.ed4 Ne6+–) 12.Ng5 (better is 12.dc5 dc5 13.Ng5 Bb7+–) 12...Ne6 13.Ne6 (better is 13.Ne4 Be7 14.Ne7 Qe7 15.d5+–) 13...Qe6?? (better is 13...fe6 14.Nf4 d5+=) 14.Nc7+– (14.Nc7 Ke7 15.Ne6 fe6 16.c4+–) 1–0. DEFFM – GuestVSPG, freechess.org, 2016.

5.e3 Nf6 6.d4 e4 7.c4=.

5.e4 Bb7 6.Nc3 (6.d3 Nf6=) 6...Nf6 7.Bd3 h6 (7...Qe6 8.Qe2=) 8.Nf3+= Qe6 9.0-0 (9.Qe2 Bc5+=) 9...Bd6 10.Nh4 (10.Qe2 Qg4+=) 10...g5 (10...0-0 11.Qe2+=) 11.Nf5+– Bf8 12.Qf3 (12.Ne3 Qd6+–) 12...c6 (12...a4 13.Qe2 Rh7 14.Ne3+–) 13.a4 (13.Qe3 c5+–) 13...d5 (13...Kd8 14.Rab1+–) 14.bc6 Bc6 15.ed5 Nd5 16.Nb5 Qd7 (better 16...Kd7 17.Bc4 g4+–) 17.Be5 Rg8 (17...f6 18.Bd4 Nf4 19.Be4+–) 18.Nfd6 Kd8 (18...Bd6 19.Nd6 Kf8+–) 19.Nf7 (19.Nf7 Ke8 20.Rae1+–) 1–0. DEFFM – XXAXX, freechess.org, 2018.

5.a4 cb5 (5...d5 6.e3=) 6.ab5 Qc5 (6...d5 7.Nf3 e4 8.Nd4=) 7.e3 (7.Nc3 Nf6+=) 7...e4 (7...Qc7 8.Nf3 e4 9.Ne5=) 8.Ba3 (8.Ra4 d5+=) 8...Qg5 (8...Qe5!? 9.Ra2 Ba3 10.Na3 d5=) 9.Bf8+= Kf8 10.Nh3 (better is 10.Ra4 Nf6 11.Nc3+=) 10...d5?? (better is 10...Qf5+=) 11.Ng5+– f6 12.Nh3 h5 (12...Bh3 13.gh3 f5 14.d3+–) 13.Nf4 Bg4 14.Be2 Nd7 15.Bg4 hg4 16.Qg4 (better is 16.Ng6 Ke8 17.Qg4 Nf8 18.Nh8 Ne7 19.Qg7 Kd7+–) 16...g5 17.Ng6 Kg7 18.Nh8 Kh8 19.Qd7 d4 20.Qd4 (20.h4 g4 21.Qb7 Re8 22.ed4 g3+–) 20...Rc8 21.Qe4 Nh6 22.Qg6 Ng4 23.Qh5 1–0. mic (2160) – rvollaerts, net–chess.com, 2008.

5.c4 d5 6.d3 Nf6 7.Nf3 Nbd7 8.g3 (8.bc6 bc6 9.Qa4 Qe6=) 8...e4 9.de4 de4 (worse 9...Ne4 10.cd5 Qc5 11.Nd4 Qd5 12.Bg2+=) 10.Nd4 c5 (10...e3 11.bc6 ef2 12.Kf2 bc6 13.e3-/+) 11.Nf5= Qe6 12.Ne3 b6 (12...Be7 13.Bg2=) 13.h4 h5 (13...Ne5 14.Bh3 Qd6 15.Bc8 Rc8 16.Nd2+/-) 14.Bh3+/- Ng4 15.Qd5 Qd5 16.Nd5 (worse 16.cd5 Ne3 17.fe3 Bb7=+) 16...Bb7 (16...Rb8!?+/-) 17.Nc7+- Ke7 18.Na8 Ba8 19.e3 (19.Rf1 Ndf6+-) 19...f5 (19...Nde5 20.Be5 Ne5+/-) 20.Nc3 (better 20.Ke2!?+-) 20...Nde5+= 21.Bg4 Nd3 (21...hg4!? 22.Na4 Nc4+=) 22.Kf1 hg4 (22...fg4 23.Na4 Rh6 24.Ke2+/-) 23.Nd1 (23.Na4 Rh6+/-) 23...Nb2 (better 23...Bb7!? 24.Ra2 Bc8+=) 24.Nb2+- g6 (24...Kd6 25.Rd1 Kc7 26.Ke2+-) 25.Rd1 Bg7 26.Rd2 (26.Na4 Rb8+-) 26...Bb2 27.Rb2 Rd8 (27...Bb7 28.Ke2+/-) 28.Ke2 Rd3? (better 28...Bb7+-) 29.h5 gh5 30.Rh5 Ra3 31.Rh8 1-0. PlatinumEd (2270) - BurashkaChe (2135), Rated Blitz game, lichess.org, 2016.

5.Nf3 e4 6.Nd4 Nf6=.

5.e3 c6 6.c4 dc4 7.Bc4 Be6 8.Qa4 Qh4 9.bc6 Nc6 10.Bb5 Qa4 11.Ba4 Bd7 12.Ne2 Bd6 13.Nbc3 Nf6 14.d4 ed4 15.Nb5 Bb8 16.ed4 Ne7 17.0-0 0-0 18.Nec3 Ned5 19.Rfe1 Nc3 20.Nc3 (worse is 20.Bc3 Rc8 21.Bd2 Rc4–/+) 20...Ba4 21.Na4 Rd8 22.Nc5 b5 23.Bc3 Bf4 24.g3 Bc7 25.Reb1 ½–½. Van Esbroeck,Jeff – Hoefer,Hans_Peter, 10 years 3a LSV M/V, 1999.

5.Nf3 Nd7 6.e3 a4 7.Nc3 Ngf6 (7...Qd6 8.h3 Ngf6 9.Be2 Be7 10.0-0 0-0 11.Rb1 Nb6 12.d3 Rd8+=; 7...Nb6 8.Be2 Bf5 9.0-0 0-0-0 10.Re1 Nf6 11.d3 Kb8 12.Nb1 Nfd7+=) 8.Be2 Qe6 9.d3 Bd6 10.0-0 0-0 11.Qd2 Re8 12.Ng5 Qe7+=.

5.Nf3 Nd7 6.e3 a4 7.d3 A) 7...Ngf6 8.c4 (8.Be2 Qd6 9.0-0 Be7 10.c4 0-0 11.Nc3 dc4 12.dc4 e4=) 8...dc4 9.dc4 e4 10.Nd4 Nb6 11.Nd2 Bd7 12.Rc1 Bg4=; B) 7...Qd6 8.Be2 (8.Nbd2 Ngf6 9.c4 Ra7 10.cd5 Qd5 11.d4 e4 12.Ne5 Nb6=) 8...Ngf6 9.0-0 Be7 10.c4 0-0 11.Nc3 dc4 12.dc4 e4=.

5.Nf3 Nd7 6.e3 a4 7.Be2 e4 (7...Ngf6 8.0-0 (8.Nc3 Qe6 9.d3 Bd6 10.Qd2 0-0 11.0-0 Re8 12.Ng5 Qe7+=) 8...Qd6 9.c4 e4 10.Nd4 dc4 11.Bc4 Ne5 12.Be2 Nfg4=; 7...Qd6 8.Nc3 (8.Bc3 Qe6 9.0-0 Bd6 10.Re1 Ngf6 11.Bb2 0-0 12.Nc3 Nb6+=) 8...Ngf6 9.0-0 Be7 10.Nh4 Nb6 11.f4 e4 12.Qe1 0-0+=; 7...Qe6 8.c4 (8.Nc3 Ngf6 9.Ng5 Qf5 10.Nf3 Be7 11.0-0 0-0 12.Bd3 Qe6+=) 8...dc4 9.Qc2 Bd6 10.Bc4 Qg4 11.0-0 Ngf6 12.h3 Qh5=) 8.Nd4 Qg5 (8...Nb6 9.0-0 Qh4 10.Nc3 Nf6 11.Qe1 Bd6 12.f4 Qe1=) 9.0-0 Ngf6 10.f3 (10.f4 Qg6 11.Bc3 Bd6 12.Qe1 Nc5=) 10...Bd6 11.f4 (11.Nc3 Nc5 12.Rb1 Bh3=) 11...Qg6 12.d3 (12.Qe1 Nc5=) 12...Nc5 13.g3 (13.Nc3 Bh3 14.Rf2 Bf4 15.Nd5 Nd5+=) 13...h5 14.b6 (14.de4!? Nce4 15.Nc3–/+) 14...h4–+ (14...cb6?! 15.Nb5 Bb8 16.Bf6 Qf6 17.N1c3+=) 15.f5 Qg5 16.g4 Qe3 17.Rf2?? (better is 17.Kg2 Be5 18.de4 h3 19.Kh1 Nfe4 20.bc7–+) 17...Bh2! 18.Kh1 (18.Kh2 Qf2 Double attack (18...Qf2 Deflection; 18...Qf2 Overloading)) 18...Qf2 19.de4 (19.Qf1 Qf1 20.Bf1–+) 19...Nfe4 0–1. tekkeryole – kiri1959, gameknot.com, 2014.

5.Nf3 Nd7 6.e3 Ngf6 7.Nc3 Qe6 8.Bd3 Bd6 9.0-0 Qg4 (9...0-0 10.e4 d4 11.Ng5=+) 10.Be2= Qh5 11.Nd4 Qg6 12.Bd3 e4 13.Be2 Ne5 14.Kh1 Qh6 15.g3 Neg4 16.Bg4 Ng4 17.h4 g5 18.Kg2 (18.Nd5? gh4 19.Kg2 hg3–+) 18...gh4 19.Rh1 h3 20.Kf1 Nf2! 21.Kf2 (21.Nf5 Bf5 22.Qe2 Nh1 23.Ne4 Be4 24.Qg4–+) 21...Bg3 (22.Kf1 h2–+) 0–1. kamret (2150) – Scotwiz (1710), GameColony.com, 2003.

5.c4 Qe6 6.e3 d5 (6...Bc5 7.Nf3 d6 8.d4 ed4 9.Bd4 Bd4 10.Nd4=) 7.cd5 Nd5 8.Nf3 (8.Bc4 Qd6=) 8...Bd6 (8...e4 9.Nd4 Qg6 10.d3+=) 9.Qb3 (9.Bc4 c6=) 9...a4 10.Qa2 Nd7 (10...c6 11.e4 Nf6 12.Bc4=) 11.Bc4 (11.Nc3 N7b6=) 11...N7b6+= 12.Bd5 Nd5 13.Qc4 f6 14.d3 0-0 15.0-0 Nb6 (15...Bd7 16.e4 Nf4 17.Nc3+=) 16.Qe6 Be6 17.Nc3 Rfd8 18.Rfd1 Bg4 19.Rac1 Ra5 20.Rb1 Be7 (20...Kf7 21.h3 Bf3 22.gf3+=) 21.h3 Bh5 22.g4 (22.Rbc1 Bg6 23.Ne1 Bd6+=) 22...Bg6 23.e4 Be8 24.Bc1 (24.Rbc1 Bd6+=) 24...Bc5 25.Be3 (25.Kg2!?–/+) 25...Ba3–+ 26.Bb6 cb6 27.d4 ed4 28.Nd4 Bc5 (28...Kf7 29.Nd5–+) 29.Ne6 Rd1 30.Rd1 Bb5 31.Nb5 Rb5 32.Rd7 h6 (better is 32...g6!? 33.Rg7 Kh8 34.Rb7 h5 35.gh5 gh5 36.Nc5 Rc5 37.Rb6 a3–/+) 33.Rg7= Kh8 34.Rb7 Ra5 (34...Rb4 35.Nd8+=) 35.Nc5 (35.Rb8 Kh7 36.Rb7 Kh8 37.Rb8 (worse is 37.Nc5 bc5 38.Rb2 a3–/+) 37...Kh7 38.Rb7 Kg8 39.Rg7 Kh8 40.Rd7–/+) 35...bc5–/+ 36.Kf1 a3 37.Rb1 a2 38.Ra1 Kg7 39.Ke2 Kf7 40.Kd3 Ke6 41.f4 Ra4 42.h4 Kd6 43.g5 (43.h5!?–/+) 43...fg5 44.fg5 hg5 45.hg5 Ke5 46.Kc3 ½–½. Manninen,Juha – Trigance,Eric, corr ICCF TT–4–90 SF, 1995.

5.d4 ed4 6.Nf3 c5 7.bc6 Nc6 8.Nd4 d5 9.Nd2 a4 10.e3 Bg4 11.N2f3 Nd4 12.Bd4 Ne4 13.Bd3 Ra5 14.Bb6 +/–.

5.e3 d5 6.c4 c6 7.cd5 cd5 8.Nf3 Nbd7 9.Be2 e4 10.Nd4 Ne5 (10...Qe5 11.Nc3=) 11.0-0 Qc7 (11...Qd6 12.Nc3=) 12.Nc3+= Bc5 (better 12...Bd6!?+=) 13.Rc1+– Qd6 (13...Qd8 14.f3 ef3 15.Nf3+–) 14.Na4+– Nc4 (14...Bd4 15.Bd4 (15.ed4?! Ng6+=) 15...Nfd7 16.f4 ef3 17.Bf3+–) 15.Bc4 (15.Nc5?! Qc5 16.Bc4 dc4+–) 15...Ng4? (better 15...dc4 16.Rc4 Bd4 17.Rd4 Qe6+–) 16.f4 dc4 17.Rc4 Bd4 18.Bd4 (18.ed4?! Be6 19.Rc1 0-0+–) 18...Be6 (18...Bf5 19.Rc5 Be6 20.Rg5+–) 19.Bc5 Qd5 20.Rd4 Qh5 (20...Qf5+–) 21.h3 Nf6 22.Qh5 Nh5 23.f5 Ng3 24.fe6 Nf1 25.Rd7 fe6 26.Re7 Kd8 27.Kf1 Rf8 28.Ke2 Rc8 29.Rg7 Rf5 30.Bd4 Rc4 (30...Rb5 31.Nc3 Rc3 32.Bc3+–) 31.Nc3 e5 32.Ne4 ed4 33.Nd6 d3 (33...Rcc5 34.Nb7 Kc8 35.Nd6 Kb8 36.ed4 Rb5 37.Nf5 Rf5 38.Rh7+–) 34.Kd3 Rd5 (34...Rcc5 35.Nb7 Kc8 36.Nd6 Kb8 37.Nf5 Rf5 38.Kc4+–) 35.Kc4 Rd6 36.d4 1–0. Pierre – Veller, internet, 2020.

5.e3 d5 6.Nf3 Bg4 7.Be2 Nbd7 8.0-0 Qe6 9.d3 (9.h3 Bf3 10.Bf3 Bd6=) 9...Bd6 10.Nbd2 0-0 11.e4 Nb6 (11...Bf3!? 12.Bf3 d4=) 12.ed5+= Nfd5 13.Ne5 Be2 14.Qe2 Na4 15.Bd4 Nac3 16.Qe1 Nb5 17.Bb2 Rfe8 18.Ndc4 (18.Ndf3 Qh6=) 18...f6 19.Nf3 Qd7 20.Qb1 Bf4 21.Kh1 (21.Re1 Re1 22.Qe1 a4=) 21...Kh8 (21...b6 22.Kg1+=) 22.Ncd2 (22.a4 Nd6=) 22...Ndc3 (22...Bd2 23.Nd2 Re2 24.Ne4=) 23.Bc3= Nc3 24.Qb3 (24.Qb7? Reb8 25.Qa8 Ra8–+) 24...Bd2 25.Nd2 Qc6 26.Rae1 (26.Nc4 Nb5=) 26...a4 27.Qb2 (27.Qf7 b5=) 27...b6 (27...b5 28.Nc4 Nd5 29.Ne3=) 28.f3 (28.Nc4 Nd5=) 28...f5 (28...Nd5 29.Ne4=) 29.Nc4 Qf6 30.Ne3 (30.f4 Qd4=) 30...f4 31.Ng4 Qc6 32.Re5 Re5 (32...Nd5 33.Rfe1 Re5 34.Ne5=) 33.Ne5 Qc5 34.Re1 Nd5 (34...b5 35.Nd7 Qd4 36.Ne5=) 35.Nf7 Kg8 36.Ng5 Qc3 The mate threat is Qxe1 37.Qc3 Nc3 38.Ne4 (38.Re7 Nd5 39.Rd7 Re8=) 38...Nb5+= 39.Ra1 Kf7 40.Kg1 Ke6 41.Kf2 h6 (41...Re8 42.c4 Nd4 43.Re1=) 42.c3 Rd8 43.Ke2 Rd5 44.Kd2 (44.g4 c6=) 44...Rh5 45.h3 Re5 46.d4 (46.Rb1 Na3 47.Ra1 Nb5=) 46...Rd5 47.Kd3 (47.Ke1 Nd6+=) 47...g6 (better is 47...c5!?–/+) 48.Kc4 (48.Re1 Kf5=) 48...Nd6 49.Nd6 (49.Kb4 c5 50.dc5 Ne4=) 49...Rd6 (49...Kd6!? 50.Rb1 Kc6=) 50.Rb1 (50.Kb5 Kd5+=) 50...Rc6= ½–½. Rosenhahn,Eberhard – Trigance,Eric, corr ICCF TT–4–90 SF, 1995.

5.Nf3 Qc5 6.e3 (6.Be5 Ng4 7.Bd4 Qb5+=) 6...Bd6 (6...e4!? 7.Ne5 d5=) 7.d4+/– ed4 8.Bd4 Qh5 (8...Qf5 9.Bd3 Qg4 10.0-0+/–) 9.h3 (9.Bf6!? gf6 10.Nc3+/–) 9...Qh6 10.c4 c5 11.Bb2 Ne4 (11...Be7 12.Be5+/–) 12.Nbd2 (better is 12.Qd5 Qe6 13.Bg7+–) 12...Qg6?? (better is 12...Nd2 13.Qd2 0-0+/–) 13.Ne4+– Qe4 (13...Be7 14.Qd5+–) 14.Qd6 Qc2 (14...Qe7 15.0-0-0+–) 15.Qd2 (better is 15.Bg7 Qf5 16.Bh8 Qe6+–) 15...Qb3 (15...Qd2 16.Nd2 f6 17.Ne4+–) 16.Bg7 Rg8 1–0. GuestNRRC – GuestSNPW, freechess.org, 2017.

5.Nf3 d6=.

5.Nf3 e4 6.Nd4=.

4.c4 b6 5.e3 Bb7 6.Nf3 d6 7.d4 Nd7 (7...ed4 8.Nd4 Nf6 9.Nd2+=) 8.Nbd2 (8.Be2 Ngf6+=) 8...Ngf6 (8...e4 9.Ng1=) 9.h3 (9.d5 c6 10.dc6 Bc6+=) 9...g6 (9...e4 10.Nh2=) 10.Qc2 (10.d5 Bg7=) 10...Bg7= 11.Rc1 (11.c5 dc5 12.bc5 Bf3 13.Nf3 e4=) 11...0-0 12.Be2 Rac8 (12...ed4 13.Bd4 h6 14.0-0=) 13.0-0 (13.d5 c6 14.dc6 Rc6=) 13...ed4 14.Nd4 Ne5 15.Rfe1 c5 16.N4f3 Nh5 (16...cb4 17.ab4 Nc4 18.Nc4=) 17.Ne5 Be5 (17...de5 18.Bh5 gh5 19.b5+=) 18.Bh5 gh5 19.Nf1 (19.e4 Rfd8+=) 19...Kh8 (19...f5 20.f3=) 20.f4 Bb2 21.Qb2 f6 22.Re2 (22.e4 h4+/-) 22...Rg8 (better 22...Be4+=) 23.Rd1 (23.e4 Qg7+/-) 23...Rg6 (23...Bf3 24.Kh2 Be2 25.Qe2-/+) 24.Qd2 (better 24.bc5!? bc5 25.e4+=) 24...Rcg8 (24...Bf3 25.Kh2 Be2 26.Qe2-/+) 25.g3 (25.e4 Be4 26.g3 Qe6=+) 25...f5 (25...Bf3 26.f5 Rg3 27.Ng3 Be2 28.Qe2-+) 26.Kf2 (26.bc5 Qg7 27.e4 dc5=+) 26...h6 (26...Qg7 27.Qb2 Qb2 28.Rb2 h4=+) 27.Ke1 (27.Qc3 Kh7=+) 27...h4 (27...Bf3-/+) 28.gh4? (28.g4!? fg4 29.bc5-/+) 28...Qh4 (28...Bf3!? 29.Rf2 Bd1 30.Kd1 Qh4 31.Rf3-+) 29.Rf2 Rg2?? (29...Bg2 30.Ke2-+) 30.Qc3 (better 30.Qb2! Kh7 31.Rd6 cb4 32.ab4=) 30...Kh7-/+ 31.Rdd2 (31.Qb2!? Rg1 32.Qe2-+) 31...Rf2-+ 32.Rf2 Qh3 (better 32...Rg2!? 33.Qd2 cb4 34.ab4 a5-+) 33.Qf6 Be4?? (better 33...Bg2!? 34.Qe6 Rg6 35.Qf7 Rg7-+) 34.Qd6?? (better 34.Rh2 Qh2 35.Nh2 Rg1 36.Nf1+-) 34...Rg1 35.Qc7 Kg6 36.Qb6 (better 36.Qd6 Kh5 37.Qd1 (37.Qb6?? Qe3 38.Kd1 Qf2 39.Qh6 Kh6 40.bc5 Rf1) 37...Kg6 38.Qd6 Kh7 39.Qc7 Kg6 40.Qd6= (40.bc5?? Qe3 41.Kd1 Qf2 42.Qb6 Kh5 43.Qh6 Kh6 44.c6 Rf1; 40.Qb6? Kh5 41.Qc5 Bd3-+)) 36...Kh5-+ 37.Qd8?? (better 37.Qc5 Bd3 38.Kd2 Rf1 39.Qf8 Rf2 40.Kd3 Qf1 41.Kd4 Rd2 42.Kc5-+) 37...Rf1! 38.Rf1 Qe3 39.Kd1 Bf3?? (better 39...Bg2 40.Qd7 Qb3 41.Ke2 Qc4 42.Kd2 Qa2 (worse 42...Qf1 43.Qf5 Kh4 44.Qf6 Kg3 45.Qg6 Kf2 46.Qe8-+) 43.Ke1 Qb1 44.Qd1 Qd1 45.Kd1 Bf1 46.bc5 Bb5-+) 40.Rf3-/+ Qf3 41.Kc2 Qe4 (41...Qa3!? 42.Qe8 Kh4 43.Qe7 Kg4 44.Qc5 h5=+) 42.Qd3= Qf4 43.bc5 (better 43.Qd1!? Kg6 44.Qg1 Kf6 45.Qc5=) 43...Qf2-/+ 44.Kb3 Qc5 45.Qh3 Kg5 46.Qg3 Kf6 47.Qh4 Ke6 (better 47...Kg6!?-/+) 48.Qh6= Ke5 49.Qg7 Ke4 (49...Kf4 50.Qf6 a5 51.Qh4 Ke5 52.Qh8 Ke6 53.Qe8 Kf6 54.Qb5 Qe3 55.Ka4+=) 50.Qg2 Ke5 51.Qb2 Ke4 52.Qc2 Kf3 53.Qc3 Kg2 54.Qb4 (54.Qg7 Kf2=) 54...Qb4 (better 54...Qe3 55.Ka4 f4=+) 55.Kb4?? (better 55.ab4 f4 56.c5=) 55...f4-+ 56.c5 f3 57.c6 f2 58.c7 f1Q 59.c8Q (59.Kc5-+) 59...Qb5 (better 59...Qb1 60.Kc3 Qc1 61.Kb4 Qc8-+) 60.Kc3= Qa5 61.Kb3 Qb5 62.Kc3 Qa5 63.Kb3 Qd5 64.Kb4 Qd6 65.Qc5 Qd2 66.Ka4 Qd1 (66...Kg3 67.Qc7 Kg4 68.Qc4 Kf5 69.Qa6 Qd4 70.Ka5 Qd2 71.Kb6 Qe3 72.Kc6 Qe6 73.Kb7 Qe7 74.Kc8 Qe8 75.Kc7 Qe7 76.Kb8 Qe5 77.Ka7 Qe3 78.Ka8 Qe8 79.Kb7 Qe4 80.Qc6 Qe7 81.Kb6 Qa3 82.Qd5 Kf4 83.Qd4 Kf3 84.Qf6 Ke4 85.Qh4 Ke5 86.Qg5 Ke6 87.Qg6 Kd5 88.Qf5 Kd4 89.Qf4 Kd5 90.Qf7 Ke5 91.Qg7 Kf5 92.Qh7 Kf6 93.Qh8 Ke6 94.Qe8 Kf5 95.Qb5 Kf4 96.Qc4 Kf3 97.Qc6 Kg3 98.Qe4=) 67.Ka5 Qd8 (67...Qd3 68.Qc6 Kg3 69.a4+/- (worse 69.Qa6 Qa3 70.Kb6 Qe3 71.Kc7 Qe7 72.Kc6 Qe6 73.Kb5 Qe2 74.Kb6 Qf2 75.Kc7 Qf7 76.Kd8 Qg8 77.Ke7 Qg7 78.Ke8 Qh8 79.Kf7 Qh7 80.Ke8 Qc2=)) 68.Ka6 Qa8 69.Kb5 Qb7 70.Qb6 Qd7?? (better 70...Qd5 71.Ka4 Qa8 72.Qa5 Qc6 73.Qb5 Qd6+/-) 71.Ka6 (71.Qc6 Qc6 72.Kc6 Kg3+-) 71...Qc8?? (better 71...Qd3 72.Kb7 Qa3=) 72.Qb7+- Qb7 73.Kb7 Kf3 74.a4 Ke4 75.a5 Kd5 76.a6 Kc5 77.a7 Kc4 78.a8Q Kd3 79.Qa5 Ke4 80.Qc7 Kf5 81.Kc6 Ke4 82.Qd6 Kf3 83.Kc5 (83.Kd5 Kg4 84.Ke4 Kg5 85.Qe5 Kg6 86.Qe7 Kh5 87.Qg7 Kh4 88.Kf4 Kh5 89.Qg5) 83…Ke3 ½-½. zembelek (2150) - CormoranKR (1955), Rated Blitz game, lichess.org, 2014.

4.c4 Nf6 5.e3 d5 6.Nf3 Bg4 7.h3 Bh5 8.Qa4 c6 9.cd5 Bf3 10.gf3 Qd6 (better is 10...Nd5!? 11.Nc3 Nc3 12.Bc3 Nd7=) 11.dc6+/– Nc6 12.b5 Na7 13.ba6 Qc6?? (better is 13...b5 14.Bb5 Nb5 15.Qb5 Nd7+–) 14.ab7 Qa4 (14...Rb8 15.Qa7 Bd6+–) 15.ba8Q (worse is 15.ba8N Qc6 16.Be5 Nd7–/+; 15.ba8B?! Bd6 16.Nc3 Qc2=) 15...Kd7 (15...Ke7 16.Be5 Qd7 17.Nc3+–) 16.Qb7 (better is 16.Nc3!? Qa5 17.Nb5 Qb6 18.Qa7 Qa7 19.Na7 Bc5+–) 16...Kd8 17.Nc3 Qc2 (17...Qd7 18.Qb8 Nc8 19.Qe5+–) 18.Rc1 Qf5 19.Ba6 Bc5 (19...Qd7 20.Qb8 Ke7 21.Ne4+–) 20.Ke2 (better is 20.Nd5 Qc8 21.Qa7 Nd5 (21...Ba7?? 22.Rc8 Kd7 23.Nf6 gf6 24.Rh8+–) 22.Rc5 Qd7 23.Rc8 Ke7 24.Qd7 Kd7 25.Rh8 h6+–) 20...Re8 21.Nb5 Nb5 22.Rc5 Nd6 23.Qc7 1–0. Van Esbroeck,Dirk – Ventura,Bob, SN–2010-0-00295, 2010.

4.d3 d5 5.e3 Nf6 6.h3 (6.Nf3 Nbd7=) 6...Nbd7=+ 7.g4 h6 8.Bg2 c6 9.c3 (9.c4 dc4 10.dc4 a5=) 9...Qe6 10.Nd2 Bd6 11.Ne2 0-0 12.Qb3 a5 13.ba5 Ra5 14.0-0-0? (better 14.c4!?=+) 14...Nc5 15.Qc2 b5 16.f4 (16.Nb3 Nb3 17.Qb3 Qe7–+) 16...ef4 17.e4 de4 18.de4 Na4 19.Nb3 (19.Nd4 Qe8 20.Nb1 Be5–+) 19...Ra6 20.Ned4 Qe7 (better 20...Qe8–+) 21.Nc6?? (better 21.e5 Qe5 22.Rhe1 Nb2 23.Re5 Nd1 24.Qd1 Be5 25.Nc6–+) 21...Rc6 22.e5 Ba3 (22...Nb2?! 23.ef6 Qf6 24.Bc6 Ba3 25.Bb5–+) 23.Bc6 Bb2 24.Kd2 Qe5 25.Rhe1 (25.Qd3 Be6 26.Nd4 Bc3 27.Kc2 Bc4 28.Qc3 Nc3 29.Kc3 Qc5–+) 25...Rd8 (better 25...Bc3 26.Kc1 Be1 27.Rd3–+) 26.Nd4 Bc3 27.Qc3 Rd4 (27...Rd4 28.Kc2 Bf5 29.gf5 Qf5 30.Be4 Re4 31.Rd8 Kh7–+) 0–1. Delboy Smith (1835) – StarJock (2300), ChessWorld.net, 2012.

4.e3 d5 5.Ne2 f6 6.c4 dc4 7.Nec3 b5 8.d4 ed4 9.Qd4 Nc6 10.Qd1 Qd6 11.Nd5 Be6 12.Nbc3 Nge7 13.e4 Nd5 14.ed5 Qe5 15.Ne2 Bd5 16.Be5 0-0-0 17.Bc3 Bg2 18.Qd8 Nd8 19.Bg2 Bd6 20.0-0 Nf7 21.Rad1 Ng5 22.Nd4 Re8 23.Rfe1 Be5 24.Ne2 Re6 25.Be5 Re5 26.Nd4 Rd5 27.Bd5 Normal 1-0. jolubolu (1780) - Dooby1 (1815), Rated Blitz game, lichess.org, 2016.

4.e4 b5 5.Nc3 Bb7 6.Nd5 (6.Nf3 Nf6 7.Bd3 Nc6 8.0-0 g6 9.Nd5 Qd6 10.Nf6 Qf6 11.c3 Be7; 6.Bd3 Nf6 (6...Nc6 7.Nf3 Nf6 8.0-0 g6 9.Nd5 Qd6 10.Nf6 Qf6 11.c3 Bg7; 6...c5 7.bc5 Nf6 8.Qf3 Qc5 9.Nge2 Bd6 10.0-0 0-0 11.a4 b4; 6...Qd8 7.Nf3 Nc6 8.0-0 Nf6 9.Qe2 Bd6 10.a4 ba4 11.Na4 Nb4) 7.Nge2 Qe6 8.0-0 Nc6 9.f4 Be7 10.f5 Qd6 11.Bb5 Nb4) 6...Bd5 7.ed5 d6 (7...Nf6 8.Qf3 (8.c4 a5 9.ba5 Ra5 10.cb5 Nd5 11.Qb3 c6) 8...c6 9.dc6 (9.c4 bc4 10.Bc4 e4 11.Qf5 Nd5) 9...dc6 (9...Nc6 10.Nh3 d5 11.Be2 Qc7) 10.c4= (10.Ne2 Qe6 11.Ng3 e4) 10...e4 11.Qc3 Qb7) 8.a4+/– ba4 (8...Nf6 9.ab5 Nd5 10.Qf3 e4 11.Qb3 Nf6) 9.c4 Nd7 (9...Nf6 10.Nf3 Nbd7 11.Qa4 Rb8) 10.Qa4 Ngf6 (10...f5 11.Nf3 Ngf6) 11.Bd3 (11.Nf3 Rb8) 11...Qd8 (11...e4+–) 12.Nf3 Be7 13.Qc2 Qb8 14.Bc3 Qb6 15.0-0 c5 16.Rfb1 Qc7 17.b5 g6? (better is 17...Qc8!?+/–) 18.ba6+– 0-0 (18...Ra7 19.Qa4+–) 19.Rb7 Qc8 20.Qb1 Bd8 21.a7 Bb6? (21...e4 22.Ra6 ef3+– (22...ed3?? 23.Rc6 Bc7 24.Rcc7+–)) 22.Rb6 Nb6 23.Qb6 Rd8 (23...Qd8 24.Ra6 Qb6 25.Rb6+–) 24.Ne5! Nd7 (24...de5 25.Qf6 Pinning (25.Qf6 Deflection)) 25.Qd6 Ne5 26.Qe5 (26.Be5?! Rd6 27.Bd6 Kg7+–) 26...Kf8 (26...f6 27.Qf6 Rd7 28.Re1 Qf8 29.Qh8 Kf7 30.Qh7 Qg7 31.Qg7) 27.Re1 Ra7 (27...Qe6 28.Qg7 Ke8 29.de6 Ke7 30.Qf7 Kd6 31.Be5 Kc6 32.Qc7) 28.Qg7 1–0. usingprogram – poderoso1, internet, 2011.

4.e4 d6 5.Be2 (5.Nf3 Nf6 6.Nc3 g6+=) 5...Nf6 (5...f5 6.Nc3 Nf6 7.Nd5=) 6.d3 (6.Nc3 g6=) 6...Be6 (6...g6 7.Nf3=) 7.c4 Nbd7 (7...g6 8.Nc3=) 8.Nf3 h6 (8...g6 9.Ng5=) 9.0-0 (9.Nc3 g6+/–) 9...Bg4 (9...g5 10.Nc3+=) 10.Nbd2 (10.Nc3 g6+/–) 10...Bf3 (10...g6 11.h3 Bf3 12.Bf3+= (worse is 12.gf3 Nh5 13.Kh2 Nf4–/+)) 11.Nf3 (11.Bf3 g6+/–) 11...c6 (11...g6 12.d4+/–) 12.Nh4 (12.Re1!?+/–) 12...g6+= 13.f4 (13.Bc3+=) 13...Ne4 (13...h5 14.Qd2+=) 14.de4 (14.Ng6!? fg6 15.de4+/–) 14...Qh4 15.b5 (15.a4 Rg8+=) 15...Rg8 (15...Qd8 16.fe5 de5 17.Bg4=) 16.bc6 (16.ba6 ba6 17.g3 Qe7 18.fe5 de5+=) 16...bc6 17.fe5 (17.g3 Qd8 18.fe5 de5+/–) 17...de5+= 18.Bg4 (18.Kh1 Nc5 (18...Qe4 19.Bf3 Qh4 20.Bc6+–) 19.Be5 Rd8+=) 18...Rd8 (18...Bc5 19.Kh1 Nf6 20.Bh3+/–) 19.Qf3 Bc5 20.Kh1 Qe7 21.Rad1 (21.Rab1 Rg7+=) 21...Rf8 (21...Bd4 22.Bc3 Nc5 23.Bb4=) 22.Bd7 (22.Bc3!?+=) 22...Rd7= 23.Rd7 (23.Qh3 f6=) 23...Kd7 24.Qf6?? (better is 24.Qb3 Qd6 25.Bc1=) 24...Bd4 (better is 24...Qf6 25.Rf6 Rb8 26.Rf7 Be7–+) 25.Bd4 Qf6 (25...ed4 26.Qd4 Kc8 27.Rb1+=) 26.Rf6 ed4 27.Kg1 (better is 27.e5–/+) 27...a5 (better is 27...Re8–+) 28.c5= Kc7 (28...Ke7 29.Rc6 Rb8 30.Rd6+=) 29.a4 (29.Kf2 Kd7=) 29...d3 (29...Re8 30.Rf7 Kb8 31.Rf6=) 30.Kf2 d2 (30...Rd8 31.Rf7 Kb8 32.Ke1=) 31.Ke2 d1Q (31...Re8 32.Kd2 Re4 33.Rf7 Kd8 34.Rf6=) 32.Kd1+= Rd8 (32...Re8 33.Rf7 Kb8 34.Rf6=) 33.Kc2 (33.Ke2 Rd4 34.Rf7 Kd8+=) 33...Rd7 (33...Rd4 34.Rf7 Kb8 35.e5+=) 34.Kc3 Kb7 (34...Re7 35.Kd4+=) 35.Rd6 (35.g4 h5 36.gh5 gh5+/–) 35...Re7+= 36.Kd4 (36.Kd3+=) 36...Kc7 (36...h5 37.e5+=) 37.e5 (37.g4 Rd7 38.Ke5 Re7 39.Kf4 Rd7+/–) 37...Re6? (better is 37...h5!?+=) 38.Ke4+/– Re8 (38...Re7 39.g4+–) 39.Rf6 Re6?? (better is 39...Re7+/–) 40.Rf7+– Kd8 41.Rf6 (better is 41.Ra7 Re7 42.Ra8 Kc7 43.g3+– (worse is 43.Ra5 Kb7+–)) 41...Rf6 (41...Kd7+–) 42.ef6 Ke8 43.h4 h5 44.Ke5 Kf7 45.g3 Ke8 (45...g5 46.hg5 Kg6 47.Kf4 Kf7 48.Kf5 Ke8 49.Ke6 Kd8 50.g6 Kc8 51.f7 Kc7 52.g7 h4 53.f8Q Kb7 54.Qd8 hg3 55.g8Q g2 56.Qb6) 46.Kf4 (46.Ke6 Kf8 47.f7 g5 48.hg5 Kg7 49.Ke7 Kg6 50.f8Q Kg5 51.Qf4 Kg6 52.Qf6 Kh7 53.Kf7 h4 54.Qh4) 46...Kf8+– 47.Ke5 Kf7?? (47...Ke8 48.Ke6 Kf8 49.f7 g5 50.hg5 Kg7 51.Ke7 Kg6 52.f8Q h4 53.gh4 Kh5 54.Qf4 Kg6 55.Qf7) 48.Kd6+– Kf6 49.Kc6 Ke7 50.Kc7 (50.Kb7 Ke6 51.c6 Kd5+–) 50...Ke8 51.Kc8 (51.c6!? Ke7+–) 51...Ke7 52.c6 Kd6 53.c7 g5 54.Kd8 1–0. Trkn – webguy4, itsyourturn.com, 2000.

4.Nf3 Nc6 5.e3 d5 6.Be2 Nf6 7.0-0 h6 8.b5 ab5 9.Bb5 e4 10.Nd4 Bd7 11.c4 Nd4 12.Bd7 Qd7 13.Bd4 Be7 14.Nc3 dc4 15.a4 0-0 16.Qe2 c5 17.Bf6 Bf6 18.Qc4 Qd2 19.Rfe1 Bc3 20.Rac1 Bf6 21.Qc3 Bc3 22.Red1 Qb2 23.Rb1 Qa3 24.h3 Ra4 25.Rb7 Rb4 26.Re7 Qb3 27.Red7 Bd4 28.Rf1 Be3 29.fe3 Qe3 30.Kh2 c4 31.Rc7 c3 0-1. khalili (1820) - jousolimwon (1760), Rated Classical game, lichess.org.

5.c4 d6 6.Nf3 Bg4 7.Be2 Nf6 (7...e4 8.Nd4 Ne5 9.Qa4 c6 10.f3 ef3 11.gf3= (worse is 11.Nf3 Bf3 12.gf3 Nc4–/+)) 8.h3 Bd7 (8...Bh5 9.d3=) 9.Nc3 (9.0-0 e4 10.Nd4 Nd4 11.Bd4 c5 12.Bf6 Qf6+=) 9...g6 (9...e4!? 10.b5 ab5 11.cb5 ef3 12.bc6 fe2 (12...fg2? 13.cd7 Qd7 14.Rg1+–; 12...Bc6?! 13.Bf3 d5 14.0-0=) 13.cd7 Qd7 14.Qe2 d5=) 10.Nd5 (10.d4 Bg7+=) 10...Nd5 11.cd5 Na7 (11...Nd8 12.Rc1 Rc8 13.d4+=) 12.Rc1 (12.0-0 Bg7+=) 12...Rc8 13.0-0 Bb5 (13...Bg7 14.d4+=) 14.d3 (14.Re1 Be2 15.Qe2 f5+=) 14...Bg7 15.a4 (15.Re1 0-0+=) 15...Bd7 16.Nd2 (16.d4 e4 17.Nd2 0-0+=) 16...0-0= 17.Ne4 (17.Bf3 f5=) 17...Qe8 (17...f5 18.Nc3=) 18.Nc3 Qe7 (18...f5 19.Qb3=) 19.e4 (19.Bg4 f5 20.Be2 Qh4=) 19...Qg5 20.Bg4 (20.Kh2 Qh4=) 20...f5 21.ef5 (21.Be2 fe4 22.Ne4 Qf4=) 21...Bf5 (21...gf5 22.Bf3+=) 22.Ne4= Be4?? (better is 22...Qh4=) 23.de4+– Ra8 1–0. GuestYCPF – GuestCYBY, freechess.org, 2016.

5.Ne2 d5 6.d4 e4 (6...Nf6 7.Nbc3=) 7.Nd2 f5 (7...Nf6!?=) 8.Nf4 Nf6 9.c4 Be6 10.Qa4 dc4 11.b5 (worse 11.Nc4 b5 12.Qc2 bc4 13.Bc4 Bd7–/+) 11...Nd8 (11...Na7 12.b6 (worse 12.Ne6 ab5 13.Nc7 Qc7–/+) 12...Bd7 13.Qd1+–) 12.Ne6 Qe6 13.Bc4 Qd7 14.0-0 a5 (better 14...Bd6!?+–) 15.f3+– Bd6 16.fe4 fe4 17.Qb3 Rf8 18.a4 Nf7 (18...Qe7 19.Rac1+–) 19.b6 c6 20.d5 Ne5 (20...Nd5 21.Bg7 (21.Bd5?! cd5 22.Kh1 Be5+–) 21...Qe6 22.Bd5 cd5 23.g3+–) 21.dc6 Qc6 (21...Nc6 22.Bf6 gf6 23.Ne4 Qe7 24.Nd6 Qd6+–) 22.Bb5 (22.Bb5 0-0-0 23.Be5 Qb6 24.Nc4 Be5 25.Nb6 Kb8 26.Rac1+–) 1–0. Pierre – Ares, internet, 2019.

5.Nf3 d6 6.c4 b5 (better is 6...e4 7.Nd4 Ne5=) 7.cb5+– ab5 8.Bb5 Bd7 9.Nc3 Nf6 10.0-0 Rb8 11.d4 ed4 12.ed4 Qd8 13.d5 Na7 14.Bd7 Qd7 15.Re1 Be7 16.Qe2 Nc8 (16...c5 17.bc5 dc5 18.Ne4+–) 17.Ne4 Ne4 18.Qe4 0-0 19.h3 (19.Nd4 Bg5+–) 19...Re8 (19...Ra8 20.Re3+–) 20.Qd4 (better is 20.Ng5! g6 21.Qh4 h5+–) 20...Bf6 21.Re8 (better is 21.Qg4!? Nb6 22.Bf6 Qg4 23.hg4 gf6 24.Red1+–) 21...Qe8+/– 22.Qd2 Bb2 23.Qb2 Nb6 24.Re1 (24.Qd4 f6+/–) 24...Qb5 25.Re7 (25.Qc2 Nd5 26.Nd4 Qa6+/–) 25...Rc8 (25...Nd5 26.Nd4 Qd3 27.Qe2 Qe2 28.Re2=) 26.Qe2 (better is 26.Nd4 Qd5 27.Ne6+/–) 26...h6?? (better is 26...Qe2 27.Re2 Ra8+=) 27.Re8 (better is 27.Qb5 Kf8 28.Re3+–) 27...Re8 (better is 27...Qe8 28.Qd3 f6–+) 28.Qe8 (better is 28.Qb5 Kf8 29.Qc6+–) 28...Kh7 (better is 28...Qe8 29.Kh2 Nd5–+) 29.Qb5+– 1–0. Fournier,Frederic – HApadua, Active, 2007.

5.c4 c6 (5...Nf6 6.Nf3=) 6.Nf3 (6.d4 Nd7=) 6...g5 (6...Nf6 7.Be2=) 7.d4 (7.c5 f6 8.cd6 Qd6+/–) 7...Bg7 8.Nc3 (8.de5 Be5 9.Ne5 de5+/–) 8...Bg4 (8...g4 9.de5 gf3 10.ed6=) 9.Be2 (9.de5 Be5 10.Be2 Bf3 11.Bf3 Qe6+/–) 9...f5 (better is 9...Bf3 10.Bf3 f5+/–) 10.Qb3 (better is 10.de5!? de5 11.h3 Bf3 12.Bf3+/– (12.gf3?! Nd7=)) 10...Bf3+= 11.Bf3 (better is 11.gf3 ed4 12.ed4+=) 11...g4 (better is 11...ed4 12.Na4 Nd7+=) 12.Be2+/– Nd7 13.0-0-0 (13.Rd1 Ngf6+/–) 13...b6 (13...ed4 14.ed4 Qh4 15.g3+=) 14.b5 (14.Qa4 b5 15.cb5 ed4 16.ed4 Nb6+–) 14...c5 (14...ed4 A) 15.bc6? Nc5 (15...dc3?! 16.cd7 Kd7 17.Bc3 Bc3 18.Qc3+=) 16.Qc2 dc3 17.Bc3 Ne4–+; B) 15.ed4 ab5 16.cb5+=) 15.ba6 (15.Nd5 Qd8+=) 15...Ra6 (better is 15...cd4!? 16.ed4 ed4+/–) 16.Nb5 ed4?? (16...Kd8 17.Nd6 Qd6 18.de5 Qe6+–) 17.Nc7 Kf7 18.Na6 Ngf6 19.Rde1 (19.h3 Ne4 20.Rhf1 de3 21.fe3 Ng3+–) 19...Ne4 (19...de3 20.fe3 (20.Qe3?! Ne5+–) 20...Qe4 21.Nc7 Qg2 22.Qd3+–) 20.Rhf1 h5 (20...de3 21.fe3 Kg6 22.Bg7 Qg7 23.Bd3+–) 21.Qd3 (better is 21.f3!? gf3 22.Bf3 Kg6+–) 21...de3 (21...Ra8 22.f3 gf3 23.gf3+–) 22.Qd5 (better is 22.Bg7 Kg7 23.Qe3+– (23.fe3 Ne5 24.Qc2 Qa7+/–)) 22...Kg6 23.fe3?? (23.Bg7 Qg7 24.Qe6 Kg5 25.h4 Kh4 26.Kb1 ef2 27.Rc1 Nd2 28.Kc2 Nf1 29.Bf1= (29.Rf1? Qe5 30.Qe5 de5–+)) 23...Bb2+= 24.Kb2 Qf6 25.Kb3 Nc3?? (better is 25...Qc3 26.Ka2 Qc2 27.Ka1 Nc3 28.Qf5 Qf5 29.Rf5 Kf5 30.Bd3 Ke5=) 26.Qf5! Qf5 27.Rf5 Kf5 28.Bd3?? (better is 28.Kc3 Ra8 29.Nc7 Ra3 30.Kb2+–) 28...Ne4+= 29.Rf1 Ke5 30.Rf7 Ng5?? (better is 30...Ke6 31.Rg7 Ndf6+/–) 31.Rd7 (31.Rf5 Ke6 32.Nc7 Ke7 33.Nd5 Ke8 34.Rg5 Ne5 35.Bg6 Ng6 36.Rg6 Kd7+–) 31...h4 (31...Rh6 32.Re7 Kf6 33.Rb7+–) 32.Rg7 (32.Nc7 Ne6 33.Re7 Rh6+–) 32...Ne6 33.Rg4 h3 34.g3 d5 (34...Rf8 35.Re4 Kf6 36.Ka4+–) 35.cd5 Kd5 36.Bc4 Kd6 (36...Ke5 37.Rg6 Re8 38.Rh6+–) 37.Rg6 Re8 38.Rh6 (38.Ka4 Ke5+–) 38...Ke5 39.Be6 Re6 40.Rh3 (better is 40.Re6 Ke6 41.Nc5 Kd5+–) 40...Ke4 (40...Kd6 41.g4 Kc6 42.g5+–) 41.g4 Kd3 (41...Rg6 42.Rg3+–) 42.g5 Rg6 (42...c4 43.Kb4+–) 43.Rg3 Ke4 44.Kc4 Kf5 45.h4 Ke4 (45...Rg7 46.Kb5+–) 46.Nc7 (46.h5 Rg7 47.h6 Ra7+–) 46...Rc6 (46...Kf5 47.Nd5 Ke5 48.h5+–) 47.Nb5 Re6 48.Nc3 (better is 48.g6!? Re7+–) 48...Ke5 49.h5 White intends g6 49...Kd6 50.g6 Ke7 51.g7 b5 1–0. jaddwarrior (1925) – valla, ChessWorld.net, 2016.

5.Ne2 Nf6=.

5.Nf3 Bg4 6.Be2 e4 7.Nd4 Be2 8.Qe2 c5 9.Nf5 Qg5 10.Ng3 f6 (10...cb4!? 11.Qc4 Nc6 12.Qe4 Nge7+=) 11.h4 Qd5 (11...Qg6 12.Qc4+–) 12.Nc3 Qc6 13.Qh5 g6 14.Qd5 Ne7 (better 14...cb4 15.Qe6 Kd8 16.ab4 Qd7+–) 15.Qc6 (15.Qe4?! d5 16.Qf4 Nd7+–) 15...Nec6 (15...Nbc6 16.Nce4 Nf5 17.Nf6 Kd8 18.Nge4 cb4 19.Nd5+–) 16.Nd5 (16.Nd5 Kf7 17.Bf6+–) 1–0. DEFFM – Pushkin, freechess.org, 2018.

5.Nc3 c6 6.Bc4 b5 7.Bb3 Bb7 8.Nf3 d6 (8...d5 9.d3=) 9.0-0+= g6 (9...c5 10.Re1+=) 10.Re1 Nbd7 (10...Bg7 11.d4+=) 11.Na2 (11.Ng5!? d5 12.f4+/–) 11...Bh6 (11...Bg7 12.a4=) 12.c4 (12.d4 0-0+=) 12...0-0= 13.cb5 cb5 (13...ab5 14.Nc3=) 14.Nc3+= Bc6 (14...Rac8 15.d4+=) 15.d4 Rad8 (15...Rfc8 16.Bc1 Bg7 17.Ng5+=) 16.d5 Ba8 17.Bc1 Bc1 18.Rc1 ½–½. Schutz – Bettinger, LohbergIII–Hammin, 1984.

5.d3 Nc6 6.Nc3 g6=.

5.d3 Nc6 6.Nf3 d5 7.Nc3 d4 8.Na4+=.

5.d3 Nc6 6.Nf3 d6 7.Be2 (7.c4 g6=) 7...h6 (7...g6 8.c4=) 8.Nbd2 (8.Nc3 Bd7+=) 8...g5 (8...g6 9.d4 ed4 10.Nd4=) 9.h3 (9.0-0 Bg7=) 9...Bg7 10.c3 (10.0-0 0-0=) 10...0-0 (10...Nh5 11.0-0=) 11.Qc2 (11.0-0 d5=) 11...d5 (11...Bd7 12.Nc4+=) 12.c4 (12.0-0 Bd7=) 12...d4 (12...de4 13.de4 Rd8 14.Nb3=) 13.c5 (13.Rc1 Bd7=) 13...Nd7 (13...Bd7 14.Rb1=) 14.g4 (14.0-0!?+=) 14...Re8 (14...a5 15.Qc4+=) 15.Nf1 (15.h4 Nf8=) 15...Nf8 (15...a5 16.b5 Na7 17.Rc1 Nb5 18.Ng3+=) 16.Ng3+= Ng6 17.Bc1 Nf4 (17...Be6 18.Nf5 Qf6 19.h4=) 18.Bf4= ef4 19.Nh5 (19.Nf5!? Qf6 20.Kf1+=) 19...Bh8–/+ 20.Nd2 (20.0-0 Be6–/+) 20...Be6 21.f3 (21.0-0 Red8–/+) 21...f6 (21...a5 22.b5 Ne5 23.0-0–/+) 22.h4 Bf7 (22...a5 23.b5 Ne5 24.Nb3–/+) 23.hg5 (23.Nc4 a5 24.b5 Nd8–/+) 23...hg5 (23...fg5 24.Nc4–/+) 24.Kf2 (24.Rh3 a5 25.b5 Ne5+=) 24...Ne5 25.Rh2 (25.Rh3 a5 26.b5 a4+=) 25...Ng6 (25...a5 26.b5–/+) 26.Rah1 (26.Nb3 Qd7 27.Rah1+=) 26...Nh4 (better is 26...a5!? 27.Nc4 ab4 28.ab4 Ra6+=) 27.Nf4+= f5? (27...a5 28.b5+=) 28.gf5 (better is 28.Ng2 fe4 29.Ne4+–) 28...Be5+= 29.Ng6 (29.Ng2!? Bh2 30.Nh4+=) 29...Bg6+= 30.Rh4 (30.fg6!? Bh2 31.Qc4 Kg7 32.Rh2+=) 30...gh4–/+ 31.fg6 Bg3 (31...Qf6 32.f4 Bf4 33.Qc4 Kg7 34.Nf3–/+) 32.Kf1 (32.Kg2 Qf6+=) 32...Kg7 (32...Qf6 33.Qc4 Kg7 34.Nb3–/+) 33.Qb2 (better is 33.f4!? Kg6 34.f5 Kg7 35.Nf3=) 33...Qf6–/+ 34.Qb3 (34.Rg1 Kg6 35.Nc4 Rg8–/+) 34...Rf8 (34...Kg6 35.Qd5–+) 35.Qd5 c6 (35...Rad8 36.Qh5 Rh8 37.Qg4–+) 36.Qd7 Kg6 37.e5 Qe5 38.Ne4 Rad8 39.Qg4 (39.Qb7 Qd5–/+) 39...Kf7 40.Bd1 (better is 40.Ng3 Qg3 41.Qh5 Ke6 42.Rh4–/+) 40...Rg8?? (better is 40...Rh8–/+) 41.Bb3+= Rd5 42.Bd5 (better is 42.Qd7! Kg6 43.Qb7+/–) 42...cd5+= (42...Qd5 43.Qg8 Kg8 44.Nf6 Kf7 45.Nd5 cd5 46.Rh3+–) 43.Nd6 (better is 43.Qd7 Kf8 44.Qc8 Kg7 45.Qb7 Kf8 46.Qc8 Kf7 47.Qd7 Kf8 48.Qd6 Qd6 49.Nd6 (49.cd6?? de4 50.fe4 Kf7–+) 49...Bd6 50.cd6+=) 43...Qd6?? (better is 43...Ke7 44.Qg8 Qe1 45.Kg2 h3 46.Kh3 Qh1 47.Kg4 Qh4 48.Kf5 Qf6 49.Kg4 Qf4 50.Kh5 Qf3 51.Qg4 Qg4 52.Kg4 Bd6 53.cd6 Kd6=) 44.Qg8!+– Kg8 45.cd6 Kf7 (45...Kf8 46.Kg2+–) 46.Kg2 Ke6 47.Kh3 Kd6 (47...Bd6 48.Kg4 Be7 49.f4+–) 48.Rc1 (48.Kg4 Ke5+–) 48...Bf4 (48...Kd7 49.Kg4+–) 49.Rc2 Bg5 50.Kg4 Be7 (50...Bf6 51.f4+–) 51.f4 Kd7 (51...b6 52.Rc8+–) 52.Kf5 b6 (52...Bd8 53.Rg2+–) 53.Kg6 (better is 53.Rh2 a5 54.ba5 ba5 55.a4+–) 53...a5?? (53...Bd6 54.f5 h3+–) 54.ba5 ba5 55.a4 Bd6 56.f5 h3 (56...Ba3 57.f6+–) 57.f6 h2 58.Rc1 Ke6 59.f7 Bf8 (59...Ke5 60.Rh1 Kf4 61.Rh2+–) 60.Rh1 Ke5 61.Rh2 Kf4 (61...Kd6+–) 62.Re2 Kf3 63.Re8 Ba3 64.Kg7 1–0. nbh999 (2145) – waycoolguy (2120), ChessWorld.net, 2003.

5.d3 Nc6 6.Nf3 h6 7.c4= b6 (7...Qe6 8.Nc3 Be7 9.Nd5+=) 8.Nc3+= Nd4 (8...Qe6 9.Nd5 Ra7 10.g3+/–) 9.Nd5 (9.Be2 c5+/–) 9...Nd5+= 10.cd5 (10.Nd4 Nf6 11.Nf3 d6+=) 10...Nf3 (10...a5 11.Nd4 ed4 12.b5+=) 11.Qf3+= g5 (11...a5 12.ba5 Ra5 13.Qf5+=) 12.Rc1+/– Ra7 13.Be2 (13.Rc4 a5 14.ba5 ba5+/–) 13...Bg7 14.Rc2 (14.0-0 d6+/–) 14...Qd6 (14...d6 15.Qe3+/–) 15.h4 (15.Qg3 Qe7+/–) 15...gh4 (15...a5!? 16.ba5 Ra5+/–) 16.Rh4+– Qf6 (16...Qe7 17.Qg3 Bf6 18.Rh5+–) 17.Qg3 (17.Qf6 Bf6 18.Rh5 Ke7 19.Be5 Be5 20.Re5 Kd8+–) 17...d6 (17...0-0 18.Bc1 Qg6 19.Rg4+–) 18.f4 (better is 18.Bg4 0-0 19.Bc8 Rc8 20.f4+–) 18...ef4?? (18...Qg6 19.Qf2+–) 19.Rf4 (better is 19.Bf6 fg3 20.Bg7+–) 19...Qf4?? (better is 19...Qg5 20.Qg5 hg5 21.Bg7 Rg8+/–) 20.Qf4+– (20.Qf4 0-0 21.Bg7 Kg7 22.e5+–; 20.Qg7?! Rf8 21.Bf6 Qh2+–) 1–0. nbh999 (1960) – Stiller, ChessWorld.net, 2003.

5.d3 d5 6.ed5 Nd5 7.g3=.

5.d3 d5 6.Nf3 Nc6 7.Nc3+=.

4.Nf3 e4 5.Nd4 c6 6.e3=.

5.Bb5?? Bg2–+ 6.Bd7 (6.Nf3 Bh1 7.Ne5–+) 6...Nd7 7.d4 Bh1 8.d5 Qg5 9.Nf3 Qf5 10.Nh4 (10.Nbd2 a5–+) 10...Qh3 11.Qh5 Qh2 (11...Ngf6 12.Qg5 Ne4 13.Qg1 Qh4 14.c4–+) 12.Qg4 (12.Nc3 Ngf6 13.Qg5 Nd5–+) 12...Bd5 (12...Ngf6!? 13.Qg3 Qg3 14.fg3–+) 13.Nc3 Be6 14.Qe4 Rb8 15.Qc6 (15.Nf3 Qh5 16.Nd2 Ne7–+) 15...Bd6 (better 15...Qh4 16.Qc7 Qh1 17.Kd2–+) 16.Nf3 Qg2 (better 16...Qh1 17.Ke2 Qh5 18.Rg1–+) 17.Nb5 (17.Ne5 Qg1 18.Ke2 Qg5 19.Nd7 Bd7–+) 17...Rb6 (better 17...Ne7 18.Nc7 Bc7 19.Qc7 Qf3 20.Qd6–+) 18.Ne5 (18.Qa8 Ke7 19.Na7–+) 18...Rc6 19.Nc6 a6 (better 19...Qc6 20.Nd6 cd6 21.0-0-0–+) 20.Nd6 cd6 21.Na5 Ngf6 (better 21...Qg1 22.Ke2 Bg4 23.Kd3 Qf2–+) 22.Rd1 d5 (22...Ne4 23.Ke2 Bg4 24.Kd3 Nf2 25.Kd2 Nd1 26.Kc1 Ne3 27.Kb1 Qc2 28.Ka1 Be6 29.Nb3 Bb3 30.b5 Qd1 31.Bc1 Qc1) 23.Nc6 0-0 (23...Ne4 24.Ke2 d4 25.Kd3 Nf2 26.Kd2 Nd1 27.Kc1 Nc3 28.Nd4 Qf1 29.Kd2 Ne4) 24.Ne7 Kh8 25.Bf6 Nf6 26.c4 dc4 (26...Ne4 27.Ng6 fg6 28.Rd5 Qh1 29.Ke2 Rf2 30.Kd3 Rd2) 27.Ke2 Bg4 (27...Ne4 28.Ng6 fg6 29.Rf1 Rf2 30.Rf2 Qf2 31.Kd1 Qd2) 28.Kd2 Qf2 29.Kc3 Bd1 (29...Ne4 30.Kd4 Qf6 31.Kc4 Qc3 32.Kd5 Nf6 33.Kd6 Rd8) 30.Kc4 (30.Kd4 Rd8 31.Kc5 Nd7 32.Kd5 Nb8 33.Kc5 Qe3 34.Kc4 Bb3) 30...Qc2 31.Kd4 Qe4 (31...Rd8 32.Nd5 Rd5) 32.Kc5 (32.Kc3 Qe3 33.Kb2 Qb3 34.Ka1 Bc2 35.Ng6 Bg6 36.b5 Qa3) 32...Qe3 (32...Qe7 33.Kb6 Rb8 34.Ka6 Qd6 35.Ka5 Qb6) 33.Kd6 Rd8 34.Kc7 (34.Kc6 Bf3 35.Nd5 Nd5 36.b5 Qb6) 34...Qe7 35.Kc6 (35.Kb6 Rd6 36.Kc5 Qc7) 35...Ba4 (35...Rd6 36.Kc5 Qc7) 36.b5 (36.Kb6 Nd5 37.Ka5 Bb5 38.a4 Qb4) 36...Bb5 37.Kb6 Nd5 38.Ka5 Qa3 0–1. MARYMARY – Delboy Smith, ChessWorld.net, 2015.

5.Nf3 a6 6.Ne5 Qg5 7.Nf3 Qg6 8.d3 (8.c4 Bd6+/-) 8...Nh6 9.Nbd2 d5 (9...Be7 10.c4+/-) 10.g3 (10.c4 Nd7+/-) 10...d4 (10...c5 11.bc5 Nc6+-) 11.Bd4+- Bd6? (better 11...Nc6 12.Bc3 Be7+-) 12.Bg2 Nc6 13.Bb2 (better 13.Nh4!? Qe6 14.Bg7 Rg8 15.Bh6 Qh6+-) 13...0-0 14.0-0 Ng4 15.d4 h5 (15...Rae8 16.Nh4 Qg5 17.d5+-) 16.h3 Nh6 (16...Nf6 17.e4! Nd7 18.d5+-) 17.c4 (17.Nh4 Qh7+-) 17...bc4 18.Nc4 Be7 (18...Rad8+-) 19.Nfe5 Qe6 (19...Ne5 20.Ne5 Qb6+-) 20.d5 Qf5 21.dc6 Bc8 (21...Rad8 22.cb7 Rd1 23.Rfd1+-) 22.Qe2 (22.e4!? Qg5 23.h4 Qf6+-) 22...h4 23.g4 Qe6 24.Rad1 f5 (24...Rd8+-) 25.Bd5 fg4 26.Be6 (26.Be6 Be6 27.Ng6+-) 1-0. Ollecram (1850) - ashkan_rezaee (1845), Rated Classical game, lichess.org, 2014.

5.Nf3 e4 6.Nd4+=.

5.Bb5 a6 6.Bc6 dc6 7.Nf3 e4 8.Ne5 Nf6 (8...c5 9.c4+–) 9.Nc6+– Qd7 (9...Qd6 10.Ne5+–) 10.Ne5 Qe6 11.0-0 Bd6 12.f4 ef3 (12...c5 13.f5 Qe7 14.Nc4 cb4 15.Bf6 Qf6 16.Nd6 Qd6 17.Qg4+–) 13.Qf3 (13.Qf3 Rb8 14.Nc6+–) 1–0. DEFFM – GuestGDJG, freechess.org, 2018.

5.Bb5+/– Nf6 6.Bc6 dc6 7.Nf3 e4 8.Nd4 (8.Ne5 Qe6+/–) 8...Bg4 (8...c5 9.Nc6 Qe6 10.b5+/–) 9.Qc1 (9.f3 ef3 10.gf3 Bd7+/–) 9...c5 10.Nc6 Qd6 11.b5 Be7 (11...Bd7 12.d3+=) 12.c4 (better is 12.Be5!? Qd7 13.Qb2+–) 12...Qd3+= 13.Nc3 Bd6 14.h3 Bh5? (better is 14...Be6=) 15.g4+– Bg6 16.Ne2 a6 17.a4 0-0?? (better is 17...ab5 18.cb5 Rg8+–) 18.0-0 (better is 18.Ra3 ab5 19.Rd3 ed3 20.Bf6+–) 18...Qe2–+ 19.Qc3?? (better is 19.f4 Ng4! 20.hg4 Qg4 21.Kh2 Qh4 22.Kg2–+) 19...Ng4 (better is 19...Qf3 20.Ne5 Qh3–+) 20.Qg7 1–0. GuestKVZK – GuestCVLM, freechess.org, 2017.

5.Nc3+=.

5.e3 a6!?=.

5.e3 Bb7? 6.Bb5+/– c6 7.Be2 Nf6 8.0-0 g6 (8...a5 9.b5+/–) 9.d4+– e4 10.Nfd2 d5 11.c4 Bg7 12.Nc3 Nbd7 13.Rc1 0-0 14.Qa4 Rfb8 15.Qa5 h5 (15...Qe6 16.Rc2+–) 16.Rc2 Qd8 17.Qd8 White gets in control 17...Rd8 18.cd5 cd5 19.Rfc1 Rac8 (19...h4 20.Nb3+–) 20.Nb3 Nb6 21.Nc5 Bc6 22.Ba6 Rc7 23.Nb1 Rd6 24.b5 Be8 (24...Bd7 25.Nd2+–) 25.Ne4! Rc2 (25...de4 26.Rc7) 26.Nf6 Bf6 27.Rc2 Nc4 28.Nc3 Bd8 (28...Nb2 29.Rb2 Bd7 30.Bb7+–) 29.Bb7 Nb2 (29...Ba5 30.Nd5 Bb5 31.a4+–) 30.Rb2 Bb6 (30...f5 31.Nd5 g5 32.f3+–) 31.Bd5 Bd7 (31...Kf8 32.Bb7 f5+–) 32.Ne4 Rd5 33.Nf6 Kg7 34.Nd5 Be6 (34...g5 35.Nb6 ab6 36.a4+–) 35.Nb6 ab6 36.Rc2 Bb3 37.Rc6 f5 (37...Kf8 38.Rb6 Ke8 39.Rc6+–) 38.h4 Bd5 (38...Kf7 39.Rb6 f4 40.Rd6 fe3 41.fe3+–) 39.Rb6 Be4 40.a4 Bc2 (40...f4+–) 41.a5 Kf7 42.Rb7 (better is 42.a6!? Be4 43.Rc6 Ke7+–) 42...Ke6 43.a6 (better is 43.d5 Kd5 44.a6 Ke6+–) 43...Be4 44.Rb6 Kd7 45.a7 Kc7 46.Rb8 Bd5 47.b6 Kd7 White now must not overlook the idea f4 48.b7 Kc7 49.Rc8 Kb7 (49...Kd6 50.b8Q Ke6 51.Qe5 Kf7 52.Rc7 Kf8 53.Qd6 Ke8 54.Qe7) 50.a8Q Kb6 51.Qd5 g5 (51...f4 52.Rc6 Ka7 53.Qd7 Kb8 54.Rc8) 52.Rc6 Ka7 53.Qd7 Kb8 54.Rc8 1–0. kamret (2280) – p.i.sumi (1625), GameColony.com, 2003.

5.e3 Nc6? 6.Bb5+– Qd7 (6...Bd7 7.0-0+–) 7.0-0 (7.Be5!? a6 8.Ba4 a5+–) 7...a6 8.Ba4 Qf5?? (better 8...Nge7+–) 9.Bc6 Kd8 10.Ba8 Ne7 (10...Nf6 11.e4! Qg6 12.d4+–) 11.c4 (11.e4 Qg6+–) 11...e4 (11...Qd3 12.c5+–) 12.Nd4 Qf6 13.Nc6 Nc6 14.Bf6 (14.Bf6 gf6 15.Bc6+–) 1–0. GuestFGNL – GuestVXRL, freechess.org, 2018.

4.e3 Bb7 5.c4 d6 6.Nf3 Nd7 7.Be2 g5 8.d4 g4 9.Nfd2 h5 (9...Bg2 10.Rg1 Bb7 11.Bg4+=) 10.d5+/- Bg7 11.Qc2 Nh6 12.Nc3 f5 13.0-0-0 (13.0-0!?+=) 13...a5 14.b5 Nc5 15.Nb3 Bc8 16.Nc5 bc5 17.h3 Qg5 18.Kb1 Qg6 19.hg4 hg4 20.g3 (20.Qa4 Bd7+=) 20...Bd7= 21.Bd3 e4 22.Be2 Nf7 23.Na4 Rh1 24.Rh1 Bb2 25.Qb2 Ne5?? (25...Bc8 26.Qc3+=) 26.Qc3 (better 26.Rh8 Ke7 27.Ra8+-) 26...Qg7+= 27.Nb2 Ke7 28.a4 Rh8 (28...Kd8 29.Qe1=) 29.Qe1 (29.Rh8 Qh8 30.Qa5 Qh1 31.Kc2 Nf3 32.Bf3 gf3+/-) 29...Rh6 (29...Rh1!? 30.Qh1 Qf8=) 30.Rh6+/- Qh6 31.Qg1 (better 31.Qa5!? Qh1 32.Kc2+/-) 31...Qh3 32.Kc2 Nf3 (32...Qh8 33.Qe1 Qa8 34.Kd1=) 33.Qf1 (33.Bf3 ef3 34.Qe1 Qh7+=) 33...Qh2 (33...Kd8 34.Qa1=) 34.Nd1 (34.Bf3 gf3 35.Qe1 Kd8+/-) 34...Ne5 (34...Ng1 35.Qe1=) 35.Kc3 (35.Qe1 Kd8+/-) 35...Be8 (35...Qh8 36.Kd2=) 36.Kc2 Bg6 (better 36...Bd7=) 37.Qe1+/- Kf6 (37...Qh8 38.Qa5 Kd7 39.Qa7+/-) 38.Qa5+- Qg1? (38...Qh7 39.Qa8+-) 39.Qd2 (better 39.Qc7 Qe1 40.Qd6 Kg5 41.Nc3+- (worse 41.Qe5 Qe2 42.Kc1 Qc4 43.Nc3 Kh6+-)) 39...Nd7 (39...Ke7 40.a5+-) 40.a5 Qh1 41.a6 Qh8? (41...Ke7 42.Qc3 Qh7 43.Kd2+-) 42.a7 (42.Qc3 Ne5 43.Qa5+-) 42...Qa8 43.Qa5 Nb6 44.Qa6 (44.Nb2 Qb7+-) 44...Bf7 45.Nc3 Be8 (better 45...Nc8+/-) 46.Na4+- Bd7 (46...Nc8 47.Nc5 Ke7+-) 47.Nb6 cb6 48.Qb6 Ke7 49.Qb8 Bc6 50.dc6 Qa7 (50...d5 51.c7 Qc6 52.bc6 Kf7 53.c8Q Kg6 54.Qe6 Kh5 55.Qf5 Kh6 56.Qbf8) 51.Qa7 Ke6 (51...Kf6 52.c7 Kg6 53.c8Q Kf6 54.Qh7 f4 55.Qcf5) 52.Kc3 (52.Qd7 Kf6 53.c7 f4 54.c8Q f3 55.Qf8 Ke5 56.Qfd6) 52...Ke5 (52...Kf6 53.c7 Kg6 54.c8Q Kf6 55.Qh7 f4 56.Qcf5) 53.Qe7 1-0. BeepBeepImAJeep (2525) - FuturesTrader (2110), lichess.org, 2018.

4.e3 Nf6 5.b5 (5.Nf3 d6=) 5...Bb7 (5...a6 6.Nf3 e4 7.Nd4=) 6.Nf3 d6 7.Be2 Qd7 (7...a6 8.c4=) 8.0-0 Bf3 (8...a6!? 9.c4 Be7=) 9.Bf3+= (9.gf3?! a6=) 9...c6 10.c4 Be7 (10...e4 11.Be2+–) 11.Nc3 0-0 12.d4 ed4 (12...Qc7 13.Rc1 Re8 14.Qa4+–) 13.Qd4 a6 (13...Qc7!?+–) 14.Qb6+– ab5 15.cb5 d5 (15...Rc8 16.Rfd1+–) 16.Rfd1 Qe6 (16...Rc8 17.bc6 Nc6 18.Nd5 Nd5 19.Bd5+–) 17.Qb7 (17.bc6 Qc6 18.Qd4 Bc5+–) 17...Nbd7 (17...Ra5 18.Qc7 Ra8 19.bc6+–) 18.Qc6 Bd6? (18...Ne5 19.Bd5 Nc6 20.Be6 fe6 21.bc6 Rfc8+–) 19.Bd5 Nd5 20.Rd5 (20.Rd5 Ne5 21.Qd6 (worse 21.Rd6 Qb3 22.Qc5 Nc4+–) 21...Qd6 22.Rd6+–; worse 20.Nd5 Rfd8+–) 1–0. DEFFM – GuestZYBH, freechess.org, 2018.

4.e4 Nf6 5.d3 (5.Nf3 Ne4 6.Ne5 Bb7=) 5...d6 6.c4 c5 (6...a5 7.b5=) 7.b5 (7.Nf3 Nc6=) 7...h5 (7...a6 8.Nc3=) 8.Nc3 (8.Nf3 h4+=) 8...Bg4 (8...a6 9.Be2+=) 9.Be2+= Be2 (9...a6 10.Bg4 hg4 11.Nge2+=) 10.Nge2+/– a6 (10...Nbd7 11.0-0+/–) 11.a4 (11.0-0 h4+/–) 11...a5 (11...h4 12.0-0+/–) 12.Ng3 (12.0-0 Nbd7+/–) 12...g6+= 13.Nf1 (13.0-0 Bg7+=) 13...g5 (13...Bh6!?+=) 14.Ne3 g4 (14...Qb7 15.Qf3 Be7 16.Ncd5+/–) 15.Ncd5 Qd8 (15...Nd5 16.Nd5 (16.ed5?! Bh6+=) 16...Qd8 17.0-0+–) 16.Nf6+– Qf6 17.Nd5 (17.0-0 Nd7+/–) 17...Qd8+/– 18.f4 ef4?? (better is 18...Bg7+–) 19.Bh8 Nd7 20.Nf4 (better is 20.0-0 Bh6 21.Nf4 Bf4 22.Rf4 Qg5+–) 20...f6 (20...Qh4 21.g3 Qg5 22.Nd5+–) 21.Nh5 Be7 (21...f5 22.0-0 Qh4 23.Rf5+–) 22.Qg4 Ne5 (22...Qb8 23.Qg8 Nf8 24.Bg7+–) 23.Qg8 (better is 23.Qe6 Nd3 24.Kd2 Qc8 25.Nf6 Kd8+–) 23...Kd7 24.Qd8 Rd8 (24...Bd8?? 25.Ke2+–) 25.Nf6 (25.Bf6 Nd3 26.Ke2 Ne5 27.Be5 de5 28.Rad1 Kc8 29.Rd8 Bd8+–) 25...Bf6 (25...Ke6 26.Nd5 Rh8+–) 26.Bf6 Rf8 (26...Nd3 27.Kd2 Rf8 28.Raf1+–) 27.Be5 de5 28.Rf1 (28.Ke2 Rg8 29.g3 Ke6+–) 28...Re8 (28...Rg8 29.Ra2 Ke6 30.Raf2+–) 29.h4 (29.Ra2 Rh8+–) 29...Ke6 (29...Rh8 30.Rf7 Kd8 31.g3+–) 30.Rf5 (30.Ra2 Rh8+–) 30...Rd8 (30...Rh8 31.h5 Rg8 32.Ra2+–) 31.Ke2 1–0. jaddwarrior (1770) – Defendit_Triumphans (1650), ChessWorld.net, 2014.

4.Nf3 d6 5.e3 Bb7 6.c4 Nd7 7.Be2 Ngf6 8.d4 e4 9.Nfd2 d5 10.Qb3 c6 11.Nc3 Qd6 12.c5 Qc7 13.h3 Be7 14.Rc1 a5 15.cb6 Qb6 16.b5 0-0 (16...Rb8 17.Na4 Qd8 18.b6=) 17.a4 (better 17.bc6!? Qb3 18.Nb3 Bc6 19.Nd1=) 17...Bb4 18.Ba3 Bc3 (18...c5 19.Bb4 cb4 20.Ncb1=) 19.Qc3 Rac8? (19...Rfc8 20.Bc5 Qd8 21.0-0+=) 20.Qb2 (20.Bf8 Nf8 21.Qc5 N8d7 22.Qb6 Nb6+-) 20...c5 (20...Rfe8!?+=) 21.0-0 (21.Nb3 c4 22.Bf8 Kf8+-) 21...c4 (21...Rfe8!? 22.dc5 Nc5+/-) 22.Bf8+- Nf8 23.Nc4 (23.Qc3!?+/-) 23...dc4 24.Rc4 Nd5 (24...Rd8 25.Rfc1+=) 25.Rc8+/- Bc8 26.Rc1 Be6 (26...Bd7 27.Bc4 Nb4 28.f3+/-) 27.Rc6 (27.Qc2!?+/-) 27...Qd8 28.Bc4 Nb4 29.Rc5 (29.Be6 Ne6 30.Qc3 Nc6 31.Qc6 Kf8+/-) 29...Bc4 (29...Nd7!? 30.Be6 Nc5 31.dc5 fe6+=) 30.Rc4+/- Qd5 (30...Nd5 31.Qc2 Qe7 32.Rc8+-) 31.Rc5 (31.Rb4!? ab4 32.Qb4+-) 31...Qe6 (31...Qd6 32.Rc8 Nd5 33.Qd2+-) 32.Qc3 Nd7?? (better 32...g6+/-) 33.Rc8+- Nf8 34.Qc5 (34.Qc5 h6 35.Qf8 Kh7 36.Qh8 Kg6 37.Rg8+-) 1-0. dannysmet (2055) - Roman_Denisov (1970), Rated Blitz game, lichess.org, 2021.

4.g3 Bb7 5.f3 e4 6.h4 ef3 7.Nf3 Bf3 8.Rg1 c6 9.Nc3 Bg4 10.Bg2 Nf6 11.Nb5 Na6 12.Bf6 gf6 13.d3 Rd8 14.Na7 b5 15.Bc6 dc6 16.Nc6 Qd7 17.Nd8 Qd8 18.Qd2 Qd4 19.0-0-0 Qa1 Normal 0-1. forsennato - S206 (1695), Rated Classical game, lichess.org, 2015.

4.Nc3 Nf6 5.bc5 Qc5 6.e4 =.

5.ab4 Qb4 6.Nd5 Qd6 =.

5.Nd5 Qd6 6.Nb4 Nc6 7.Nc6 dc6 8.e4 Nf6 9.Nf3 Bg4 10.h3 Bf3 11.Qf3 0-0-0 (11...Be7 12.Rd1=) 12.Qf5 Nd7 (better is 12...Qd7 13.Bc4 Qf5 14.ef5 Nd5=) 13.Qf7+/– Nc5 (13...Qc5 14.Qb3+/–) 14.Qf5 Nd7 (14...Qd7 15.Be5 Ne4 16.Qd7 Kd7 17.d4+/–) 15.Bc4+– g6 16.Qe6 Kb8 (16...Kc7 17.Qf7+–) 17.f4 Qd2?? (17...Qc7 18.fe5 Bg7+=) 18.Kd2 Nc5 19.Kc1 (19.Ke1 Ne6 20.Be5 Bd6 21.Bh8 Nf4+–) 19...Ne6 20.Be5 Ka8 (20...Bd6 21.Bh8 (worse is 21.Be6 Be5 22.fe5 Rhe8+–) 21...Bf4 22.Kb2 Rh8 23.Be6+–) 21.Be6 Bd6 22.Bh8 Rh8 (22...Bf4 23.Kb2 Rh8 24.Rhf1 Be5 25.c3+–) 23.e5 (23.f5 gf5 24.ef5 Kb8+–) 23...Be7 (23...Bc5 24.Kd2+–) 24.Rd1 Bc5 (24...Bh4 25.Rd3+–) 25.Kb2 (25.Kb2 Be3 26.g3+–) 1–0. Rosner,Dirk – Moderlak, corr SOK–E008A, 1999.

5.Nd5 Qd8 6.Nb4 (6.Be5 d6 7.Bb2 ba3 8.Ra3 Ne7 9.Ne7 Qe7+/–) 6...Bb4 (6...d6 7.e4=) 7.ab4 Qe7 (7...d6 8.e3=) 8.Ba3 (8.Nf3 d6=) 8...b5 (8...Nf6 9.Nf3=) 9.e3+= a6 (9...Bb7 10.f3 (10.Bb5?? Bg2 11.Qg4 Bh1–+) 10...a6 11.Ne2=) 10.Qg4 Qf6 11.Bb2 Bb7 12.Nf3 (12.d4 d6+=) 12...Nh6 (12...Nc6 13.Bd3+=) 13.Qg5 The pressure on e5 grows (13.Qh5 Bf3 14.gf3 Nc6+/–) 13...Qg5= 14.Ng5 Nc6 (14...f6 15.Nh3=) 15.Bc3+= 0-0 16.Be2 (16.Bd3 f5+=) 16...d5 17.Nf3 (17.d4 ed4 18.ed4 Rfe8=) 17...Rfe8 18.0-0 (18.d4 f6=) 18...Ng4?? (better is 18...d4!? 19.Bb2 Nb4–/+) 19.h3 (19.d4!?+=) 19...Nf6+= 20.Rfe1 (20.d3 Rac8+=) 20...Ne4 21.Red1 (21.Kf1 Rac8+=) 21...Nc3 (21...d4!? 22.Bd3 Nf6 (worse is 22...dc3 23.Be4 cd2 24.Rd2+=; 22...Nc3?! 23.dc3 e4 24.Nd4 ed3 25.cd3–/+) 23.ed4 e4–/+) 22.dc3+= Rad8 (22...Rac8 23.Kf1+=) 23.Kh2 (23.Ne1 d4+=) 23...d4–/+ 24.cd4 (24.c4 Nb4 25.cb5 Bf3 26.gf3 ab5 27.Bb5 Rf8+= (27...Nc2? 28.Rac1 Re7 29.Rc2+–)) 24...ed4 25.Rd3 (25.Kg3 de3 26.Rd8 Rd8–/+) 25...Nb4–+ 26.Rd4 Rd4 (better is 26...Nc2 27.Rd8 Rd8–+ (27...Na1?? 28.Re8)) 27.Nd4+= Nc6?? (better is 27...Rc8 28.Bd1 Be4+=) 28.Nc6+/– Bc6 29.Ra6 Rc8 30.Rb6 (30.c4 bc4 31.Bc4 Be4+/–) 30...Kf8 31.Kg3 Bd7 (31...Ke7 32.Bd3+/–) 32.Bd3 g6 33.Kf3 (33.e4 Ke7+/–) 33...Ke7 (33...Bc6 34.Kg4+/–) 34.Ke2 (34.Kf4 h6+/–) 34...Kd8 (34...h5 35.Rb7 (35.Bb5?! Rc2 36.Kd3 Rb2=) 35...Kd6 36.e4+/–) 35.Kd2 (35.e4 h5+/–) 35...Kc7 (35...Bc6 36.Bb5 Bg2 37.Rd6 Ke7 38.Rd7 Ke6 39.Ra7 Rd8 40.Ke2 Bh3 41.Bc4 Kd6 42.Rf7+/–) 36.Rf6+– Be8 37.Rf4 (37.g4 h6+–) 37...Kd6 (37...f5 38.g4 fg4 39.Rg4+/–) 38.Rb4 (38.g4 h6+/–) 38...Kc5 39.c3 (39.Rd4 Bc6 40.g4 h6+/–) 39...Ra8 40.Rb2 Bc6 41.f3 h5 42.e4 h4 43.Ke3 (43.Bb1 Bd7+/–) 43...Ra3 (43...g5 44.f4 gf4 45.Kf4+/–) 44.Rc2 Bd7 45.Kf4 (45.f4 Be6+/–) 45...Be6 46.Kg5 Bc4 47.Bc4 Kc4 The isolani on c3 becomes a target 48.Kf6 (48.e5!?+/–) 48...Ra7= 49.e5 (49.Rc1 Rb7=) 49...Rb7 50.e6 (50.Rc1 Kd3=) 50...fe6 51.Ke6 (better is 51.Kg6!? Kd3 52.Rc1=) 51...Kd3 52.Rc1 Kd2 53.Rb1 (53.Ra1 Kc3 54.Ra3 Kc2 55.Ra2 Kb1–+) 53...Kc3 54.Kf6 (54.Kd5 b4 55.Kc6 Rb8–+) 54...Rb6–+ 55.Kg5 b4 56.Kh4 b3 57.Kg5 Kc2 58.Re1 (58.Rf1 b2–+) 58...b2 59.f4 (59.g4 b1R 60.Rb1 Kb1–/+) 59...b1Q Threatening mate: Qxe1 60.Rb1 Kb1 61.g4 White intends f5 61...Kc2 62.f5 gf5 63.gf5 Rb3 (63...Rb5 64.h4 Kd3 65.h5=) 64.h4 (64.f6 Rg3 65.Kf5 Rf3 66.Kg6 Rh3=) 64...Rg3 65.Kh6 1–0. Trkn – joker_44, itsyourturn.com, 2000.

5.e4 Nf6 6.Nc3 Nc6=.

5.e4 Nf6 6.d3 Ng4?? (better is 6...Nc6+=) 7.Qg4+– Qc2 8.Be5?? (8.Qe2 Qc5+–) 8...Nc6? (8...d6 9.Qf4 de5 10.Qe5 Be6 11.Qc3+=) 9.Bg7?? (better is 9.Bc3 d5 10.Qd1 Qd1 11.Kd1+–) 9...d6 10.Qg3 Rg8 11.Qe3?? (11.Nd2 Rg7 12.Qf4 Qc3+=) 11...Rg7 (better is 11...Bg7 12.Qd2 Qd2 13.Nd2 Ba1–+) 12.Qd2?? (12.d4 Rg4 13.Nd2 Qb2=) 12...Nd4 13.Nf3?? (13.Qd1 Qb2 14.Nf3 Nc2 15.Ke2 Na1 (15...Qa1?! 16.Qc2 a6 17.Qb3–/+) 16.Nfd2 f5–+) 13...Nf3 (better is 13...Qd2 14.Nbd2 Nc2 15.Kd1 Na1–+) 14.gf3= Qa4 (14...Qb3 15.Nc3+=) 15.Nc3 (15.d4 Be6+=) 15...Qd4+= 16.Ra2 (16.Rc1 Be6 17.Nb5+–) 16...Be6= 17.Nb5 Qb6 18.Rb2 d5 19.Be2 (19.d4 a6 20.Nc3 Qc6 21.ed5 Bd5 22.Nd5 Qd5 23.Qe3 Kd8+=) 19...de4 20.fe4 Bd7 (better is 20...a6!? 21.Nc3 Qc6=) 21.d4+/– f6 (21...Rc8 22.Nc3 Qc6 23.Rb3+/–) 22.Kf1 (22.Nc3 Qc6+–) 22...0-0-0? (22...Bh3 23.Ke1 f5+/–) 23.Qc2?? (better is 23.Rc2 Kb8 24.Qf4 Bd6 25.Qd6 (25.Qf6?? Bh3 26.Ke1 Bb4 27.ab4 Qf6–+) 25...Qd6 26.Nd6 Bh3 27.Ke1 Rd6 28.e5 Rd4 29.ef6+/–) 23...Bc6?? (better is 23...Kb8 24.h4 Bb5 25.Rb5 Qd4–/+) 24.d5 Kd7 25.dc6 bc6 26.Nc3 (26.Nd6 Qc7 27.Rb7 Bd6 28.Rc7 Kc7+–) 26...Qd4 (26...Qc7 27.Qa4+–) 27.Rg1 Ke8 28.Rg7 Bg7 29.Rb7 Rd7 (29...Kf8 30.Nb5! Qa1 31.Kg2+–) 30.Rd7 (better is 30.Nd5! Rd6 31.Bh5 Kd8 32.Rb8 Kd7 33.Bg4 f5 34.Bf5 Re6 35.Be6 Kd6 36.Rd8 Ke5 37.f4 Ke6 38.Qc6 Kf7 39.Qe8) 30...Qd7 31.Qd3 (31.Qb3 Ke7+–) 31...Qe6 (31...Qd3 32.Bd3 Bf8+–) 32.Qa6 (better is 32.Bh5 Ke7 33.Ne2+–) 32...Qh3 33.Kg1 Qc3 34.Qa7 (better is 34.Qc8!? Ke7 35.Qc7 Kf8 36.Qb8 Kf7 37.Bh5 Ke6 38.Bg4 f5 39.Bf5 Kf6 40.Qa7 Qc1 41.Kg2 Qg5 42.Kf3 Qh5 43.Ke3 Qh2 44.Qd4 Qe5 45.Qe5 Ke5 46.f4 Kf6 47.Bh7+–) 34...Qc1+= 35.Bf1 Qg5 36.Kh1 f5? (36...Qg4!? 37.Qa4 Kd7+/–) 37.ef5 (better is 37.Qa8 Kd7 38.Qb7 Kd6 39.Qb8 Ke6 40.Bh3 Qc1 41.Kg2 Qg5 42.Qg3 Qg3 43.hg3+– (worse is 43.fg3 h6+–)) 37...Qf5?? (better is 37...Qg4 38.Qe3 Kd8+–) 38.Qg7 Qf2 39.Qg1 (better is 39.Qe5!? Kf8 40.Qh8 Ke7 41.Qh7 Kd6 42.Qg6 Kc7 43.Qg3 Qg3 44.hg3 Kb6+–) 39...Qf8 40.Qe3 Kd7 41.Bh3 Kc7 42.Qe5 Kb6 43.Qe3 c5?? (43...Kc7 44.Qa7 Kd6 45.Qd7 Ke5 46.Qe6 Kd4+–) 44.Kg2 Qa8 45.Kg3 Qg8 46.Kh4 Qc4 47.Bg4 Qd4 48.Qd4 cd4 49.Kh5 Ka5 (49...Kb5 50.Bd1+–) 50.Bd1 1–0. minn (2000) – pauldopson, net–chess.com, 2004.

5.e4 Nf6 6.f3 Nc6+= 7.Ne2 (7.Nc3 Be7+=) 7...d5 (7...Qb6 8.Qc1+=) 8.ed5 e4?? (better is 8...Nd5 9.Nbc3 Be6+=) 9.dc6+– Qc6 (9...ef3 10.gf3 Qc6 11.Nd4+–) 10.Nd4 (10.fe4 Ne4 11.Nd4 Qg6+–) 10...Qc5 (10...Qb6 11.Bb5 Kd8 12.a4+–) 11.fe4 (11.Qe2 Bd7+–) 11...Ne4 12.Bb5 Bd7 (12...Kd8 13.0-0+–) 13.Bd7 Kd7 14.Qg4 f5 15.Qf5 (15.Nf5?! Nf2 16.d4 Qc2 (16...Ng4?? 17.dc5 Bc5 18.Nc3+–) 17.Ne3 Ng4 18.Nc2 Bd6+–) 15...Qf5 16.Nf5 Nf6 (16...Re8 17.0-0 (17.Ng7?! Bg7 18.Bg7 Rhg8+–; 17.Bg7?! Ng3 18.Kd1 Bg7 19.Ng7 Nh1 20.Ne8 Re8+–) 17...Bc5 18.d4+–) 17.0-0 Bc5 18.Kh1 (18.d4 Bf8+–) 18...Rhg8 (18...Rhf8 19.Nc3 g6 20.Na4+–) 19.d4 (19.Bf6!? gf6 20.Nc3 Rac8+–) 19...Bb6 20.Nd2 (20.c4 Ne4+–) 20...Bc7 (20...Rae8 21.Nc4 Re2 22.Rae1 Rc2 23.Nfe3 Rb2 24.Nb2+–) 21.Rae1 Rae8 22.Re8 (22.Nf3 Re1 23.Re1 g6 24.Ne5 Be5 25.de5 gf5 26.ef6 Re8+–) 22...Ne8 (22...Re8 23.Ng7 Re2 24.Bc1+–) 23.d5 Nd6 (23...Rf8 24.Ng7 Rf1 25.Nf1 Ng7 26.Bg7+–) 24.Ng7 Ne8 (24...Rc8 25.Be5 Bb8 26.c4+–) 25.Ne6 (25.Rf7 Kc8 26.Ne6 h6+–) 25...Ke7 (25...Nd6 26.Nf8 Kd8 27.Nh7+–) 26.Ne4 (better is 26.c4 Bb8+–) 26...h6 (26...Rg4 27.Re1 Ba5 28.Re2+–) 27.Nc7 Nc7 28.d6 Ke6 29.dc7 a5 (29...Rc8 30.Rf6 Kd5 31.Nc3 Kc5 32.Rf5 Kd6 33.Nb5 Ke7 34.Re5 Kd7 35.Rd5 Ke7 36.Be5+–) 30.Rf6 Ke7 31.Rd6 Rc8 32.Bf6 Kf7 33.Bd8 b5 34.Nf6 (34.Rb6 Kg7+–) 34...Ra8 35.h3 (35.Nd7 a4 36.Ne5 Kf8 37.Bf6 Kg8 38.Rd8 Kh7 39.Ra8 b4 40.Rh8) 35...b4 36.ab4 (36.Nd7 Kg8 37.Nb8 Kg7 38.c8Q Ra7 39.Bf6 Kh7 40.Qf5 Kg8 41.Qg6 Rg7 42.Qg7) 36...ab4 37.Rc6 (37.Nd7 Ra7 38.Ne5 Kg7 39.Bf6 Kg8 40.c8Q Kh7 41.Qh8) 37...Rc8 38.Nd7 Ke8 39.Nb6 Rc7 40.Bc7 1–0. malathi – campocebe, internet, 2010.

5.Nf3 Nc6 6.e3 d5 (6...Nf6 7.Be2=) 7.d3 (better is 7.Ne5 Qb6 8.Ra2+/–) 7...Bg4 8.Be2 Nf6 (8...Qb6 9.Ra2 Bd6 10.0-0+=) 9.Nbd2 (better is 9.Ne5!? Be2 10.Qe2+=) 9...Bd6= 10.0-0 0-0 11.Nb3 Qb6 12.Rb1 Qc7 13.h3 Bh5 14.Nfd2 Be2 15.Qe2 e4?? (15...Qe7 16.a4+=) 16.de4?? (better is 16.Bf6 gf6 17.de4 de4 18.Ne4 Ba3 19.Qg4 Kh8 20.Nf6+–) 16...Ne4= 17.Ne4 de4 18.Rfd1 Rfd8 19.c4 f6 20.c5 Be5 21.Be5 Qe5 (21...Ne5 22.Nd4+=) 22.Rd8 Rd8 23.Rd1 Rd1 24.Qd1 g5 (24...h6 25.Qd7 Qe7 26.Qf5+/–) 25.Nd4 (better is 25.Qd7 Qe7 26.Qf5+/–) 25...Qc5+= 26.Nc6 (26.Qa4!?+=) 26...Qc6–/+ 27.Qd8 Kg7 28.Qe7 Kg6 29.g4 a5 (29...a6 30.Kg2–/+) 30.Kg2 b5 (30...b6!?–/+) 31.Qd8+= a4 32.Qg8 Kh6 33.Qf8 Kg6 34.Qg8 Kh6 35.Qf8 Kg6 36.Qb4 (36.Qg8 Kh6=) 36...Qc4 (36...Kf7 37.Qd4–/+) 37.Qf8 (37.Qe7 Qd5 38.Qe8 Kg7 39.Qe7 Qf7 40.Qe4 Qd7=) 37...Qf7 (better is 37...Qe6!?–/+) 38.Qb8= Qd5 39.Qe8 Qf7 (39...Kg7 40.Qe7 Qf7 41.Qe4=) 40.Qe4 (better is 40.Qb5!? Qe6 41.Qa4+/–) 40...Kg7= 41.Qb4 1–0. Fournier,Frederic – def43rte, Active, 2008.

5.Nf3 f6 6.e4 (6.Nc3 Nc6+=) 6...Qd6 (6...d5 7.ed5 Qd5 8.Nc3+=) 7.d4 ed4 (7...Qb6 8.Bc3+/–) 8.Nd4+= Nh6 (8...Nc6!?+=) 9.Nc3+/– Be7 (9...Qe5 10.Be2+/–) 10.Nd5+– 0-0?? (better is 10...Bd8+–) 11.Nb5 (11.Ne7?! Qe7 12.Bc4 Kh8+/–) 11...Qc5 (11...Qe6 12.Nbc7 Qe4 13.Qe2 Qe2 14.Be2 Bd6 15.Na8 b6+–) 12.Bd4 Qc6 (12...Qd5 13.ed5 Bd8+–) 13.Ne7 Kh8 14.Nc6 dc6 15.Nc7 Rd8 16.Qh5 Rd4 17.Qe8 Ng8 18.Qc8 Na6 19.Na8 Nc5 20.Bd3! Na4 (20...Rd3 21.cd3) 21.Qb7 (21.0-0-0 h5 22.Qf8 Nc5 23.Qc5 Nh6 24.Qd4 Kh7 25.e5 f5 26.Qd7 Kg6 27.Qe6 Kh7 28.Bf5 Nf5 29.Qf5 g6 30.Rd7 Kh6 31.Qf4 g5 32.Qf6) 21...c5 22.Nc7 Nc3 23.Ne8 a5 (23...Ne7 24.Qe7 Re4 25.Be4 Ne4 26.Qg7) 24.Qg7 1–0. market (2185) – spamhead, GameColony.com, 2002.

4.b5 Nd4 5.e3 Nf5 6.Nf3 e4 7.Nd4 Nd4 (7...d5 8.c4 dc4 9.Nc3+=) 8.Bd4+= Nf6 9.Be2 d6 (9...Qe6 10.0-0+=) 10.0-0+– c5 (10...Qe6 11.f3+–) 11.bc6 bc6 12.c4 (12.Nc3 d5+–) 12...c5 (12...Qe6 13.Nc3+–) 13.Bf6 Qf6 (13...gf6 14.Nc3 f5 15.Nd5+–) 14.Nc3+– Bb7?? (better 14...Qd8+–) 15.Qa4 Ke7 16.Bg4 (better 16.Rab1!? Qe6 17.Rb7 Kf6+–) 16...a6 (16...Qg6 17.Qd7 Kf6+–) 17.Qd7 1–0. DEFFM – GuestQXFS, freechess.org, 2019.

4.c4 a5 5.b5 Nd4 (5...Nd8 6.Nf3 d6 7.Nc3=) 6.Nf3 (6.e3 Nf5+=) 6...c5 (6...Nf3 7.ef3 d6 8.Nc3=) 7.bc6 (7.Nd4 ed4 8.e3 Nf6+=) 7...Nc6 (7...Nf3 8.ef3 dc6 9.Qe2=) 8.e3 (8.Nc3 Nf6+/-) 8...Nf6= 9.Bd3?? (better 9.d4 e4 10.Nfd2+=) 9...e4-+ 10.Bf6 (10.Be4 Ne4 11.d3 Nf6-+) 10...gf6 (better 10...Qf6!? 11.Nc3 ed3-+) 11.Be4-/+ Qe4 12.d3 (12.d4 Na7-/+) 12...Qg6 13.g3 (13.Nh4 Qg5 14.g3 Qe5-+) 13...d6 (13...Ne5 14.Ne5 fe5 15.Nc3-+) 14.Nbd2 (14.Nh4 Qg5-/+) 14...Bg4 (better 14...Qd3!? 15.Qb1 Qg6 16.Qb5-+) 15.Qb3 Rb8 16.Nh4 Qh5 17.f3 (17.Rb1 Ne5 18.h3 Bd7-/+) 17...Be6 18.Ne4 (18.Qc3 b5-+) 18...f5?? (better 18...Be7-+) 19.Nf6+- (19.Nf6 Kd8 20.Nh5+-) 1-0. nookieee (1690) - jalrivi (1665), Rated Blitz tournament, lichess.org, 2014.

4.c4 d6 5.e3 (5.Nc3 Nf6=) 5...Nf6 6.Be2 Bf5 (6...e4 7.d4=) 7.d3 Qd7 8.Nf3 Be7 9.0-0 0-0 10.Nbd2 (10.b5 Nb8=) 10...a6 11.Re1 h6 (11...Bg4 12.e4=) 12.Nf1 (12.e4 Bg6+=) 12...e4 (12...Rfe8 13.Ng3=) 13.Nd4 Nd4 14.Bd4 c5 15.Bb2 ed3 (15...Be6 16.de4 Ne4 17.Qc2+=) 16.Bd3 b5 17.Ng3 (17.e4 Be6 18.Ne3 Rfc8+=) 17...Bd3 18.Qd3 d5 19.cb5 (19.cd5 c4 (worse is 19...Nd5 20.bc5 Bc5 21.Nf5+/–; worse is 19...Qd5 20.Qd5 Nd5 21.e4+/–) 20.Qc3 Qd5=) 19...c4 20.Qf5 ab5 21.Rad1 Qe6 22.e4 Ne4 23.Qd5 Qd5 24.Rd5 Bf6 25.Bf6 Nf6 ½–½. Flemming,Achim – Theel,Andreas, corr GER jub50 qJVM21, 1996.

4.d3 Nf6 5.e4 d6 6.Nf3 Bg4 7.Be2 g6 (7...0-0-0 8.0-0=) 8.0-0 Bg7 (8...0-0-0 9.b5 Bf3 10.bc6 Be2 11.cb7 Kb7 12.Qe2+/–) 9.h3 (9.b5 Bf3 10.Bf3 Nd4 11.Bd4 ed4+=) 9...Bd7 (9...Bf3 10.Bf3 0-0-0 11.Nc3=) 10.Re1 (10.b5 Na5 11.Bc3 b6 12.Ba5 ba5=) 10...0-0 11.Nbd2 (11.b5 Na5 12.Qd2 b6=) 11...Rae8 (11...Qe6 12.b5 Ne7 13.Ng5 Bb5 14.Ne6 fe6 15.Rb1+–) 12.Nh2 (12.b5 Na5 13.Bc3 b6 14.Ba5 ba5+=) 12...h5 (12...Be6 13.Nhf3=) 13.Nb3 Nd8 (13...Be6 14.Nf3=) 14.Bf3 (14.Nf3 Ne6=) 14...Ne6 15.d4 Ng5 (15...Nf4 16.c4=) 16.de5+= de5 17.Nc5 Bc6 Can e4 get defended? 18.Rc1 (18.Qd3!?=) 18...b6+= (worse is 18...Nf3 19.Nf3 Rd8 20.Qe2+=) 19.Nd3 Nfe4 20.h4 (20.b5!? Bd5 21.Qe2+=) 20...Nf3–/+ 21.Nf3 f6 (21...Bh6 22.Nfe5 Bc1 23.Nc6–/+) 22.c4 (22.b5 Bb7–/+) 22...Rd8 23.Qb3 (23.b5 Nc5 24.Nd4 Bb7–/+) 23...Qd7 (23...Rd7 24.Rcd1–/+) 24.c5 (24.Rcd1 Ba4 25.Qa2 Bd1 26.Rd1 Qf7–+) 24...Bd5 25.Qc2 Qg4 26.cb6 Nd2!! Do you see the mate threat? 27.Nde5 (27.Nd2 Qg2) 27...fe5 (27...fe5 28.Qd2 Bf3–+) 0–1. Unger,Martin – Deneuville,Christian, corr SOK, 1996.

4.e3 d5 5.Nf3 Bg4 6.Be2 a6 (6...Nf6 7.b5 Bf3 8.Bf3=) 7.0-0 (7.Ne5!? Be2 8.Nc6 Bd1 9.Ne7 Bc2 10.Nd5+/-) 7...Nf6= 8.d3 0-0-0 9.Nbd2 e4 10.Nd4 Be2 11.Nc6 (better 11.Qe2 Ne5 12.f3+=) 11...bc6?? (better 11...Bd1 12.Ne7 Be7 13.Rad1 Rhe8=) 12.Qe2+- h5 (12...Kb7 13.f3 ef3 14.Qf3+-) 13.d4 (13.Nb3 Kd7+-) 13...g5 (better 13...Kb7!?+/-) 14.Qa6+- Kd7 15.b5 (15.c4 Bg7 16.cd5 cd5 17.Qa4 c6+-) 15...cb5+/- 16.Qb5 Ke6 (16...c6 17.Qb7 Kd6+-) 17.a4 (17.c4 Qd6+-) 17...Bg7? (better 17...Qb4!? 18.Nb3 Qb5 19.ab5 Bd6+/-) 18.c4 Rb8 19.Qc6 Kf5 (19...Qd6 20.cd5 Nd5 21.Qc2+-) 20.Ba3 Qd8 (20...Qe6 21.cd5 Nd5 22.Qc2+-) 21.cd5 Rb6?! (21...Qd5 22.Qc2 Ke6+-) 22.Qc2 Nd5 (22...Qd5 23.f3 (23.Qc7?! Rc6 24.Qe7 Re8+-) 23...Kg6 24.fe4+- (24.Ne4?! Qb3 25.Qe2 Ne4 26.fe4 Re6+-)) 23.f3 (better 23.Ne4 Ne7 24.a5 Re6+-) 23...Kg6 24.Qe4 (24.Nc4!? Ne3 25.Ne3 Qd4+-) 24...Kh6?? (better 24...f5 25.Qd3 Ne3+=) 25.Nc4+- Rb3 (25...Re8 26.Ne5 Be5 27.de5+-) 26.Rfe1 (26.f4 g4+-) 26...Re8 27.Ne5 Nc3 (27...Be5 28.de5 Qd7+-) 28.Nf7 1-0. dannysmet (2045) - kingsindian75 (2000), Rated Blitz game, lichess.org, 2021.

4.e3 d6 5.Nf3 h6 6.Bb5 a6 7.Bc6 bc6 8.0-0 Bg4 9.h3 Bh5 10.d3 f5 11.Qe2 (11.c4 Rb8 12.e4 fe4 13.de4 Nf6+=) 11...g5 (11...Nf6 12.Nbd2=) 12.d4+= e4 (12...g4 13.hg4 fg4 14.Qc4+–) 13.Qc4+– Qd7 14.d5 Rh7 15.Nd4 (worse 15.dc6 Qf7 16.Qf7 Bf7=) 15...Bf7 (15...Ne7 16.dc6 Qc8 17.a4+–) 16.Nc6 g4 (16...Ne7!? 17.Ne7 Be7+–) 17.hg4+– h5 18.gf5 Qf5 19.Nc3 Rg7 (19...Nf6 20.Na5 c5 21.bc5 dc5+–) 20.Nd4?? (better 20.Rfd1 Nf6 21.Nd4+–) 20...0-0-0?? (better 20...Rg2! 21.Kg2 Qg4 22.Kh2 Qh4 23.Kg1 Qg5 24.Kh1 Qh4 25.Kg1 Qg5 26.Kh2 Qh4 27.Kg1=) 21.Qa6 Kb8 22.Nc6 1–0. DEFFM – GuestPDVY, freechess.org, 2018.

4.e3 Nf6 5.b5 Nd8 6.Nf3 =.

4.e4 d6 5.Bb5 Bd7 6.Ne2 0-0-0 7.Nec3 (7.0-0 Nf6=) 7...Nd4 (7...Qh4=) 8.Bd3 (8.Nd5 Qh4 9.Bd7 Rd7=) 8...g6 (8...Qg5!? 9.Rg1 Bg4–/+) 9.Nd5 Qg5 10.Bd4? (10.0-0 Bg7=) 10...ed4?? (10...Qg2 11.Rf1 ed4 12.Nf4 Qh2 13.Qf3–+) 11.0-0? (11.Qf3 c6 12.Nf4 Nf6=+) 11...Bh3 (better 11...c6–+) 12.Qf3= Bg4 (12...Be6 13.Nf4=) 13.Qg3 (better 13.Qf7 Bd7 14.f4+–) 13...h5?? (13...Bh6 14.f4 Qh5 15.b5=) 14.a4?? (better 14.f3+–) 14...h4=+ 15.b5?? (better 15.Qf4 Qf4 16.Nf4=+) 15...hg3–+ 16.fg3 Qh6 (better 16...Ne7 17.b6 Nd5 18.ed5 ab6 19.a5–+) 17.Na3 (17.h3 Be6 18.a5–+) 17...Qh2 18.Kf2 f5 (18...Rh3 19.Rh1 Qg3 20.Kg1–+) 19.a5 Bh6 (19...Rh3 20.Rh1 Qg3 21.Kg1 Rh1 22.Kh1–+) 20.b6 (20.Rh1 Bd2 21.Rh2 Rh2 22.Nc4–+) 20...Bd2 (better 20...fe4 21.ba7 Rf8 22.Nf4–+) 21.Rh1 (21.ba7 Kd7 22.a8Q Ra8–+) 21...Be3 (better 21...Qh1 22.ba7 Qa1–+) 22.Ke1 Qh1 (22...Qg3 23.Kf1 Rh1) 23.Bf1 Qf1! 24.Kf1 Decoy to f1 24...Rh1 A double attack 0–1. valla – kirklandlake (1715), ChessWorld.net, 2016.

4.Nf3 Nb4 5.ab4 Qb4 6.Be5 Bc5 7.Bg7 Qb6 8.e3 d5 9.Bh8 Bg4 10.Be2 d4 11.0-0 de3 12.de3 Ne7 Normal 1-0. mark19116 (1690) – KingBlunderVII, Rated Blitz game, lichess.org, 2015.

4.Nf3 d6 5.e3 Bg4 6.Be2 Nf6 7.0-0 Qd7 8.d3 Be7 9.Nbd2 0-0 10.c4 a6 11.Qc2 Rfe8 12.Rac1 Bf8 13.b5 (13.h3 Bh5=) 13...Ne7 (13...Nd8 14.h3 Bh5 15.ba6 Ra6 16.g4=) 14.Rfe1 (14.d4 Ng6 15.h3 Bf3 16.Nf3 e4=) 14...g6 (14...ab5 15.cb5 Ned5 16.h3=) 15.a4 Bg7 16.Ba3 Nf5 17.h3 Bf3 18.Bf3 Reb8 (18...ab5 19.cb5 d5 20.Qc7 Qc7 21.Rc7 Ra4 22.Nb1+=) 19.Red1 Nh4 20.Be2 Qf5 (20...ab5 21.cb5 Rc8 22.e4+=) 21.Nf3 (21.g3!? Qh3 22.gh4+/-) 21...Nf3+= 22.Bf3 Bh6 (22...Qd7+=) 23.c5 (23.b6 c5+/-) 23...d5 (23...ab5 24.cd6 c6 25.a5=) 24.Qb3 (24.b6 c6+=) 24...d4 25.e4 Qd7 26.Rc2 ab5 27.ab5 Ra5 28.c6?? (better 28.b6=) 28...bc6-+ 29.bc6? (29.Qb4 Rbb5 30.Qe7 Bg7-+) 29...Rb3 (better 29...Qe8 30.Bb4 Rab5-+) 30.cd7-/+ Nd7 31.Be7 c5 32.Bg4 Nb6 (32...Bf8!? 33.Bd8 Ra8-/+) 33.Bc5=+ Na4 34.Bd6 Nc3 35.Rf1 f6?? (better 35...Bf8 36.Bf8 Kf8-/+) 36.Be6+- (36.Be6 Kg7 37.Bb3+-) 1-0. dannysmet (1960) - Roma123bol (1920), Rated Blitz game, lichess.org, 2020.

4.Nf3 Nf6 =.

4.g3 Nf6 5.Bg2 d6 6.b5 Na5 7.d3 Be6?? (7...a6 8.a4 d5 9.Bc3=) 8.Nd2?? (better is 8.Qd2 Nc4 9.dc4+–) 8...Rb8 9.e3 b6 10.Ne2 Bg4 11.0-0 Be2 12.Qe2 Qe6 13.c4 Qg4 14.Bf3 Qg6 15.e4 Be7 16.a4 h5 17.d4 h4 18.de5 de5 19.Be5 hg3 20.fg3 Qh6 21.Bc7 Rc8 22.Bf4 Qh7 23.Rac1 Bc5 24.Kh1 Bb4 25.e5 Nd7 (25...Nh5 26.Ne4 Nf4 27.gf4 Kf8+–) 26.e6 fe6 27.Qe6 Be7 28.g4 Qh3 (28...Qg8 29.Qg8 Rg8+–) 29.Bg2 (29.Rce1 Qh4 30.g5 Qh2 31.Bh2 Rh2 32.Kh2 Kd8 33.Bg4 Bd6 34.Qd6 Nc4 35.Qd7) 29...Qh4 30.Qg6 (30.Ne4 Nc4 31.Rcd1 Rd8 32.Qg6 Kf8 33.Bh6 Bf6 34.Qg7 Ke8 35.Nf6 Qf6 36.Rf6 Nf6 37.Re1 Ne4 38.Re4 Ne5 39.Re5) 30...Kd8 31.Rfe1 (< 31.Qg7 Bf6 32.Qg6 Nf8+–) 31...Qf6 32.Qf6 Bf6 33.g5 Bd4 34.Re4 Bb2 35.Rc2 Nc5 36.Re2 (36.Rb2!? Ne4 37.Be4 Rh4+–) 36...Bd4 37.Ne4 Ne4 38.Re4 Bc5 (38...Nb3+–) 39.Rd2 Bd6 40.Rd6 Kc7 41.Rg6 (41.Rdd4 Kb7 42.Re7) 41...Kb7 42.Rg7 (42.Re7) 42...Ka8 (42...Rc7 43.Re8 Nc6 44.Rc7) 43.Re8 Nb7 (43...Nc6 44.Bc6) 44.Rh8 (44.Bb7) 44...Rh8 (44...a6 45.Rc8 Ka7 46.Rb7) 45.g6 (45.Bb7) 45...Rf8 (45...Rh2 46.Kh2 a5 47.Bb7 Ka7 48.Bd5) 46.Bg3 (46.Bb7) 46...Rd8 (46...Rf1 47.Bf1 a5 48.Bg2 Ka7 49.Rb7 Ka8 50.Rd7) 47.Bb7 1–0. baudrey – marshmallow, Live Game Caissa's Web, 2004.

5.e4 a6 6.ba6 ba6 7.Nc3 =.

5.e4 d6 6.Bc3+= Nc4?? (better is 6...b6+=) 7.Bc4+– Nf6 8.d3 Bg4 9.Ne2 b6 (9...c6 10.bc6 bc6 11.f3+–) 10.f3 Bh5 11.d4 g6 (11...Rd8 12.0-0+–) 12.g4 Bg4 (12...Ng4 13.fg4 Bg4 14.0-0+–) 13.fg4 Ng4 14.Bd5 (14.Qd3!? Qh4 15.Qg3 Qg3 16.hg3 Bg7+–) 14...Qf6 15.Rf1 (15.Ba8?! Qf2 16.Kd2 Qe3 17.Ke1 Qf2 18.Kd2 Qe3 19.Ke1 Qf2 20.Kd2=) 15...Qh4 (15...Qf1 16.Kf1 Ne3 17.Ke1 Nd1 18.Ba8 Nc3 19.Nbc3+–) 16.Ng3 Nh2 17.Bc6 Ke7 18.Rg1 (18.Ba8?! Qg3 19.Ke2 Bh6+/–) 18...Bh6 (18...Qf4 19.Nd2 Ng4 20.Qf3 Qf3 21.Nf3+–) 19.de5 de5 20.Qd7 (20.Ba8!? Bf4 21.Bb4 Kf6+–) 20...Kf6 21.Ba8 Nf3 22.Kd1 (better is 22.Kf1 Ng1 23.Qc6 Kg5 24.Be5 Bg7+–) 22...Ng1 23.Qc6 Kg5 24.Be5 Rd8 25.Kc1 Kg4 26.Kb2 Rd2 (26...Bc1 27.Ka2 Qg5+–) 27.Nd2 Bd2 28.Qd7 Kf3 29.Rf1 Kg2 30.Qd2 Kh3 31.Rg1 1–0. orane (2105) – A77, Live Game Caissa's Web, 2004.

5.Nc3 Nf6 =.

5.e3 d6 6.Nc3 Nf6 7.Nf3 Bg4 (7...d5 8.Be2=) 8.Be2 Qd7 (8...Ne6 9.h3 Bh5 10.0-0=) 9.0-0 Be7 10.h3 (10.e4 Bf3 11.Bf3 Ne6=) 10...Bf5 (10...Bf3 11.Bf3 d5 12.d3=) 11.Nh2 (11.d4 e4 12.Nh4 d5=) 11...0-0 12.g4 Be6 13.g5 (better is 13.f4!? ef4 14.ef4=) 13...Nd5–/+ 14.h4 Nc3 15.Bc3 Bh3 16.Bg4 (16.Re1 f6–/+) 16...Bg4 17.Ng4 Qb5 18.Nf6?? (better is 18.f4–/+) 18...gf6–+ 19.gf6 Bf6 20.Qg4 (20.Kh2 Kh8–+) 20...Bg7 (20...Kh8 21.Qh5–+) 21.Kh2 (21.Rab1 Qa6–+) 21...f5 22.Qg3 Qe2 (22...f4 23.ef4 Rf4 24.Rg1–+) 23.Rg1 Threatening mate... how? 23...Qg4 (23...Ne6 24.Rab1–+) 24.f4 Qg3 25.Rg3 Rf7 (25...Kh8!? 26.Rag1 Ne6 27.d3–+) 26.fe5 Kf8 27.Rag1 (27.Rf1 Be5 28.Be5 de5–+) 27...Be5 28.Be5 de5 29.Rg8 (29.Rg5 a6–+) 29...Ke7 30.Rh8 Rf8 (30...f4!? 31.Rgg8–+) 31.Rg7 (31.Rf8 Kf8 32.Rf1 Ke7 33.Rf5 Nf7–+) 31...Nf7 32.Rhh7 Rad8 33.d3 Rd6 34.h5 Rc6 35.c4 (35.Rg2 Rc3–+) 35...Rd6 36.Rg3 (36.Rg5 Rd3 37.e4 fe4 38.Re5 Kd8–+) 36...Rd3 37.h6 Rd6 (37...Ra3 38.Rhg7–+) 38.Rgg7 (38.Rh3 Kf6 39.Rg3 f4 40.ef4 ef4–+) 38...Rf6 (38...Ra6 39.Rg3–+) 39.Kg2 Kd6 (39...Ra6 40.Rg3–+) 40.Kf3 Kc5 (40...Kc5 41.Ke2 f4–+; 40...Nh6 41.Rd7 Kc5 42.Rc7 Rc6 43.Rc6 bc6 44.Rh6–+) 0–1. Langguth,Wilhelm – Ziese,Gerhard, corr, 1985.

5.e4 Nf6 6.Nc3 a6 7.Nf3 +=.

5.e4 Nf6 6.Nc3 Qe6 7.d4 (7.Nf3!?+=) 7...ed4= 8.Qd4 b6 9.Nf3 Bc5 10.Qa4 Bb7 (10...0-0 11.Bd3 Qg4 12.0-0+=) 11.Bd3= 0-0 (11...Qg4 12.0-0+=) 12.0-0+= Qg4 13.Rae1 (13.h3 Qh5 14.Rae1+=) 13...d6? (better is 13...Ne6!? 14.h3 Qh5+=) 14.h3+/– Qh5 15.Ne2 Ne6 16.Ng3 Qg6 17.Nf5 Qh5 (17...Kh8 18.N3h4 Qh5 19.e5+–) 18.Bc1 a6 19.ba6 Rfe8? (19...Ra6 20.Ba6 Ra8+–) 20.Qe8!+– Re8 (20...Re8 21.ab7 Passed pawn; 20...Ne8 21.Ne7 Double attack (21.ab7 Passed pawn)) 21.ab7 g6 (21...Nd7 22.e5 f6 23.ef6 gf6 24.Bb5+–) 22.Nh6 (22.Ng3 Bf2 23.Rf2 Qc5+–) 22...Kg7 23.e5 Ng8 24.ed6 Bd6 (24...cd6 25.Nf7! Qd5+– (25...Kf7?? 26.Ng5 Ng5 27.Re8 Nh3 28.gh3 Ke8 29.b8Q Kf7 30.Re1+–)) 25.Nf7! Kf7 26.Re6! Re6 (26...Re6 27.Ng5 Double attack (27.Ng5 Decoy); 26...Ke6) 27.b8Q Re8 (27...Qd5 28.Ng5 Kg7 29.c4+–) 28.Ng5 Qg5 29.Bc4 (29.Bc4 Kf8 30.Qe8 (30.Bg5?! Rb8 31.a4 Re8+–) 30...Ke8 31.Bg5+–; 29.Bg5?! Rb8 30.a4 Nf6+–) 1–0. Woelfelschneider,Peter – Pleschke,Helmut, internet, 2000.

5.e3 Nf6 6.b5!

5.e3 Nf6 6.Nc3 d6 7.Nf3 (7.d4 ed4 8.Nd5 Qf7 9.Nf6 Qf6=) 7...Be6 (7...Qd7 8.Nd5=) 8.d4+= ed4 9.Nd4 (worse is 9.ed4 Bc4 10.Be2 a5+=) 9...Nd4 10.Qd4 (worse is 10.ed4 Bc4 11.Be2 Ne4–/+) 10...c5 11.Qf4 Rg8 12.bc5 dc5 13.Nd5 Nd5 14.cd5 Bd7 15.Rd1 (15.Bc4 Qe4 16.Qe4 fe4+/–) 15...Qd6 (15...b5 16.Bd3 Qd6 17.Qf3+/–) 16.Be5+/– Qg6 17.Qf3 (17.d6 b5+/–) 17...b5 18.d6 Rc8 Black plans c4 19.Qb7 c4 20.Qa7 Qe6 21.Qd4 g5 22.Be2 g4 23.h3 h5 24.hg4 hg4 25.Rh7 Rg6 26.Bf4 Rc6 (26...Ra8 27.Qc3+/–) 27.Rb1 Rc8 28.a4 Qe4 (28...Qf6 29.Qf6 Rf6 30.ab5+–) 29.Qe4 fe4 30.ab5 c3 31.b6 c2 Do you see the mate threat? 32.Rc1 Rb8 33.Rc2 Rb6 34.Ra2 Rb8 35.Rh8 Rf6 36.Bd1 Rc8 37.Ra5 Be6 (37...Rb8 38.Re5 Be6 39.Bg5+–) 38.Rh7 (better is 38.Ra7 Bd7 39.Rh7 Rd8 40.Rad7 Rd7+–) 38...Rf4 39.Re5 Bd6 40.Re6 (40.ef4?! Be5 41.fe5 Rc5+/–) 40...Kf8 41.ef4 Bb4 42.Ke2 (42.Ke2 Rd8 43.Re4+–) 1–0. Armstrong,Alan – Milligan,Bernard, corr SCCA Ch, 2000.

5.e3 Nf6 6.Nf3 e4 7.Nd4 Nd4 8.Bd4 d6 (8...a5 9.b5=) 9.c5 (9.d3 a5=) 9...d5 (9...Be6 10.cd6 Qd6 11.d3=) 10.Nc3+= c6 11.Qb3 (11.Be2 Qf7+=) 11...Qf7 12.Be2 Be7 13.f4 (13.0-0 0-0=) 13...ef3 (13...Qg6 14.0-0=) 14.Bf3+= 0-0 15.0-0 Be6 16.d3 (16.Qa4 Qe8+=) 16...Qg6 (16...Ne4 17.Rad1= (17.Ne4? de4 18.Qc3 ef3–+; 17.de4?! de4 18.Qd1 ef3=; worse is 17.Be4 de4 18.Qb2 ed3–/+)) 17.Qc2 (17.Ne2 Qg5+=) 17...Rae8 18.Rae1 Bc8 (18...Ng4 19.Qa4 Bh4 20.Rd1=) 19.a4 Bd8 20.Ne2 Bc7 21.Nf4 Qh6 22.g3 Rf7 23.Rf2 (23.b5 Rfe7+=) 23...Rfe7 (23...Ng4 24.Bg4 fg4 25.Ref1=) 24.Qb2 (24.Qc3 Bf4 25.gf4 Ng4 26.Bg4 fg4=) 24...Be5 (24...Bf4 25.gf4 Ng4 26.Rfe2=) 25.Ng2 (25.Be5 Re5 26.Qd4 Qg5+=) 25...Qg5 26.Be5 Re5 Can e3 get defended? 27.Qd4 (27.Qc3 Ng4 28.Bg4 Qg4=) 27...Qh6 (27...Bd7 28.Nf4=) 28.Bd1 g5 29.Ref1 Qg6 30.Kh1 Bd7 31.a5 a6 32.Be2 R8e7 33.Bd1 (33.Kg1 Re8+=) 33...Ne8 (33...Re8!?=) 34.Rf3 Nf6 35.R3f2 (35.Kg1 Ng4+=) 35...h5 (35...Re8!?=) 36.h4 (36.h3!?+/–) ½–½. Leckebusch – Ziese,Gerhard, Wuppertal, 1977.

5.b5 Nd8 6.Nf3 =.

5.Nc3 =.

5.Nd2 Nd4 6.e3 Nf5 (6...Nc6 7.Ngf3 f6 8.c4 dc4 9.dc4+=) 7.Ngf3+= d4 (7...e4 8.de4 de4 9.Ne5+/–) 8.ed4+/– ed4 9.Be2 (9.Qe2+/–) 9...Nh4 (better is 9...a5!?+=) 10.0-0+– Bg4 (10...a5 11.b5+–) 11.Re1 0-0-0 12.Bd4 Bf3 (12...Kb8 13.Bc5 Qf6 14.Ne4 Nf3 15.gf3+– (15.Bf3?! Bf3 16.Nf6 Bd1 17.Nd7 Kc8 18.Bf8 Kd7 19.Bg7 Bc2 20.Bh8 Bd3+–)) 13.Nf3 (13.Bf3 Qd6 14.Ba7 b6+–) 13...Nf3 (13...Kb8+–) 14.Bf3 Qd7 (14...Qh4 15.c3 a6 16.Qa4+–) 15.Ba7 b6 (15...Nf6+–) 16.Bg4 f5 17.Qf3 Qd5 18.Bf5 (18.Qf5?! Qf5 19.Bf5 Kb7 20.Bb6 cb6+–) 18...Rd7 (18...Kb7 19.Be4 Ne7 20.Bd5 Nd5+–) 19.Qd5 1–0. Janek – yxdjango, internet, 2017.

5.e3 =+.

5.c4 Na7 6.e4 (6.Be2 d6+=) 6...c6 (6...Nf6 7.Nc3=) 7.c5 Nf6 8.d3 (8.Nf3 Ne4 9.Qe2 d5=) 8...Nb5 (8...d6!? 9.cd6 Qe6=) 9.Nf3+= d6 10.cd6 Qd6 11.Be5 Qd8 12.Be2 a5 13.0-0 ab4 14.Qb3?? (14.a4!? Nc7 15.Re1+=) 14...ba3 (14...Be6 15.Qc2 Ng4 16.d4 Ne5 17.de5–/+) 15.Ng5 (15.d4!? Nd6 16.Bd6 Qd6 17.Ng5=) 15...Qe7–/+ 16.f4 (better 16.d4!? Nd7 17.Bb5 Qg5 18.Bc4 Ne5 19.de5 Qe5 20.Bf7 Kd7 21.Na3=+) 16...h6–+ 17.Nf3 Ng4 (better 17...Be6 18.Qc2 Ng4–+) 18.Bb2? (18.d4 f6 19.Bb5 cb5 20.h3 fe5 21.hg4–/+) 18...Be6 19.Ba3 (19.Qc2 Ne3 20.Qd2 Nf1 21.Kf1–+) 19...Bb3 (worse 19...Ra3 20.Qb2 Ra1 21.Qa1–+; worse 19...Na3 20.Qc3–+) 20.Be7 Ra1 21.h3 (21.Bf8 Kf8 22.Nfd2 Be6–+) 21...Ne3 (better 21...Be7 22.hg4 Bc5 23.Kh2 Be3–+) 22.Re1 (22.Bf8 Rf8 23.Re1–+) 22...Be7 23.Nfd2 (23.Nbd2 Re1 24.Ne1 Ba2–+) 23...Bc2 24.Kf2 Bc5 25.Kf3 Nc3! 26.Rc1 (26.Nc3 Exploits the pin 26...Re1) 26...Ne2 (better 26...Nb1 27.Kg3–+) 27.Ke2 b6 28.g4 (28.f5 Ke7 29.Nf3 Rd8–+) 28...0-0 (28...g5 29.Kf3–+) 29.g5 (29.Nf3 Bb1 30.d4 Ng2 31.dc5 Ra2 32.Kf1 Be4–+) 29...hg5 30.fg5 Bb1 (better 30...Rd8!? 31.d4 Bd4 32.h4–+) 31.Rb1 (31.Rc5 bc5 32.Ke3 Rd8 33.Nb1 Rb1–+) 31...Rb1 32.Nb1 Ng2 33.Kf3 Ne1 34.Ke2 Nc2 (34...Bb4 35.Nd2 Rd8 36.Ke1 Rd3 37.Ke2 Rd2 38.Kf3 Rd3 39.Kg4–+) 35.Kd1 (35.h4 Ra8 36.Nd2 Nd4 37.Ke3 Nb3 38.d4 Bd4 39.Kd3 Nd2 40.Kd2 g6–+) 35...Nd4 (35...Nb4 36.Ke2–+) 36.Nd2 (36.h4 Ra8 37.Kc1 Ra2–+) 36...Ra8 37.Kc1 Ra1 38.Kb2 Rd1 39.Nb3 Nb3 (39...Nb3 40.Kc2 Rd2 41.Kc3 Ba3 42.Kb3 Rd3 43.Kc4 Rh3 44.e5 b5 45.Kd4 b4 46.g6 b3 47.Kc4 b2 48.e6 b1Q 49.gf7 Kh7 50.f8N Kg8 51.Kd4 Qd3 52.Ke5 Bd6) 0–1. Delboy Smith (1745) – Stephen71 (1750), ChessWorld.net, 2012.

5.c4 Nf6 6.Nf3 d6 7.d4 ed4= 8.Nd4 Nd4 9.Bd4 Bf5 (9...Be6 10.Nc3=) 10.Nc3+= c6 (10...Qe6 11.f3+=) 11.Bd3 Bd3 12.Qd3 g6 (12...Qe6 13.Ne2+=) 13.0-0 (13.Ne4 Bg7+/-) 13...Bg7+= 14.Rad1 Rd8 15.b5 (15.Bf6 Bf6 16.Ne4 Qe6+=) 15...ab5= 16.cb5 c5 (better 16...0-0!?+=) 17.Bf6+/- Qf6 18.Nd5 (18.Ne4 Qe6 19.Nc5 Qe7+/-) 18...Qf5 19.e4 Qd7 20.f4 0-0 21.f5 f6? (21...Be5 22.Rc1+=) 22.fg6 (better 22.Qc4!? Kh8 23.fg6+-) 22...hg6+/- 23.Qg3 g5 24.h4 g4? (24...Qe6 25.h5+/-) 25.Qf4 (better 25.Rf5!? Rde8 26.Qg4 Re5+-) 25...Rde8 (25...Kh7 26.a4+-) 26.h5 Kh7 27.Ne3 (27.h6 Bh8 28.a4 Re5 29.Qe5 fe5 (29...de5?? 30.Nf6 Bf6 31.Rd7 Kh6 32.Rb7+-) 30.Rf8 Qe6+/-) 27...Qe6 (27...Bh6 28.Rd6 Qe7 29.Qf5 Kh8+/-) 28.Qf5 (better 28.Nf5!? Qe4 29.Qd6+-) 28...Qf5+/- 29.Nf5 (29.ef5?? Re3 30.Rd6 Rf7-+) 29...Re4 30.Nd6 Re2 (30...Re5 31.Nb7 Rh5 32.a4+=) 31.Nf5 Rf7 32.a4 c4 (32...Bh6 33.Rde1 Ra2 34.Re4+/-) 33.Rf4 (better 33.Rc1 Rc7 34.b6+-) 33...Rc7?? (33...c3 34.Rc4 c2+=) 34.Rc1 (better 34.b6!? Rf7 35.Rc4 Bf8+-) 34...g3?? (better 34...c3=) 35.Ng3+- Ra2 (35...Re3 36.Kf2 Ra3 37.Rcc4+-) 36.Rfc4 Rd7 37.Rc7?? (better 37.Nf5 Rd5 38.Rf4+-) 37...Rdd2+= 38.Ne4 (38.Kh2 Rg2 39.Kh3 Rh2 40.Kg4 Ra4 41.R1c4 Rc4 42.Rc4 Rb2+=) 38...Rg2= 39.Kf1 f5 40.Rg7?? (better 40.Nd6=) 40...Kg7-+ (worse 40...Rg7 41.Nc3 Rh2 42.Re1-+) 41.Rc7? (41.Nd6 Kf6 42.Rc7 (42.Nb7 Raf2 43.Ke1 Rh2 44.Rc6 Kg5 45.Nc5 Ra2 46.Ne6 Kh4 47.Rc4 f4 48.Rf4 Kg3 49.Rf3 Kf3 50.Nd4 Ke3 51.Nf5 Kf4 52.Ne3 Ke3 53.b6 Ra1) 42...Raf2 43.Ke1-+) 41...Kh6 42.Nd6 Rgb2 (better 42...Rgd2 43.Nf7 Kh5-+) 43.Nf5 (43.Re7 f4 44.Re5-+) 43...Kg5 44.Rc1 (44.Re7 Kf5 45.h6 Kf6-+) 44...Kf5 45.h6 Rh2 46.Kg1 Rag2 (better 46...Rh6 47.Rc5 Ke4 48.Rc7-+) 47.Kf1 Ra2 48.Kg1 Rh6 49.Rc5 Ke4 50.Rc4 Kd5 (better 50...Ke3 51.Rc3 Ke2-+) 51.Rg4 (51.Rc7-+) 51...Re6 52.Kf1 Re4 53.Rg7 Rb4 54.Rd7 Ke6 55.Rd1 Rba4 56.Rb1 Rf4 57.Kg1 Kf5 (better 57...Rg4 58.Kf1 Rgg2 59.Re1 Kf5-+) 58.b6 Rd4 59.Rf1 (59.Kh1 Rad2 60.Ra1 Kf4 61.Rb1 Kg3 62.Rg1 Kf3 63.Rf1 Rf2 64.Re1 Rh4 65.Kg1 Rg2 66.Kf1 Rh1) 59...Kg4 60.Rf7 (60.Rc1 Rad2 61.Rc3 Kf4 62.Rc1 Kf3 63.Rc3 R2d3 64.Ra3 Ra3 65.Kh2 Ra1 66.Kh3 Rh1) 60...Rd1 (60...Kg3 61.Rg7 Kf3 62.Rf7 Rf4 63.Rf4 Kf4 64.Kf1 Ke3 65.Kg1 Kf3 66.Kh1 Kg3 67.Kg1 Ra1) 61.Rf1-+ Rf1 62.Kf1 Rb2 (62...Rh2 63.Ke1 Kf3 64.Kd1 Ke3 65.Kc1 Kd3 66.Kb1 Kc3 67.Ka1 Kb3 68.Kb1 Rh1) 63.Ke1 Rb6 (63...Kf3 64.Kd1 Rb6 65.Kc2 Re6 66.Kc3 Ke3 67.Kb4 Kd4 68.Kb3 Re3 69.Kc2 Rc3 70.Kd2 b5 71.Ke2 b4 72.Ke1 Rc2 73.Kd1 b3 74.Ke1 b2 75.Kd1 b1Q) 64.Kd2 Kf4 65.Kd3 Ke5 (65...Rd6 66.Kc2 Ke4 67.Kb1 Ke5 68.Ka1 Rf6 69.Kb2 Rb6 70.Kc3 Rh6 71.Kd2 b5 72.Ke1 Rh1 73.Kd2 Rh2 74.Kd3 Ra2 75.Ke3 b4 76.Kf3 b3 77.Kg4 b2 78.Kg5 b1Q 79.Kg4 Qf5 80.Kh4 Rh2 81.Kg3 Qf4) 66.Kc4 Rb1 67.Kc5 Ke4 68.Kc4 (68.Kd6 Rc1 69.Kd7 b5 70.Ke6 b4 71.Kf6 b3 72.Ke6 b2 73.Kf6 b1Q 74.Kg7 Rc7 75.Kf6 Qg1 76.Ke6 Qb6) 68...b5 69.Kc3 (69.Kc5 b4 70.Kd6 Rd1 71.Ke6 b3 72.Kf7 b2 73.Kg7 b1Q 74.Kf6 Rd6 75.Ke7 Rc6 76.Ke8 Qb7 77.Kf8 Rc8) 69...Kd5 70.Kc2 (70.Kd2 b4 71.Ke3 Re1 72.Kd3 Rd1 73.Ke3 b3 74.Ke2 Rd4 75.Ke3 b2 76.Ke2 b1Q 77.Kf3 Qe4 78.Kf2 Rd2 79.Kg3 Rg2 80.Kh3 Qg4) 70...Rb4 71.Kc3 Kc5 (71...Kc5 72.Kd3 Rd4 73.Ke3 b4 74.Kf3 b3 75.Ke3 b2 76.Kf3 b1Q 77.Ke3 Qe4 78.Kf2 Rd2 79.Kg3 Rg2 80.Kh3 Qg4) 0-1. miskob (2125) - Chinochino (2150), Rated Blitz game, lichess.org, 2017.

5.c4 g6 6.Nf3 (6.d4 Bg7+=) 6...Bg7 7.Be2 d6 8.0-0 Nf6 9.d4 e4 10.Nfd2 Be6?? (better is 10...0-0+=) 11.Nc3 (11.Nc3 d5 12.Qc2+/–) 1–0. GuestVGMK – GuestVTYW, freechess.org, 2017.

5.c4 Bb7 6.Nf3 f6 (6...e4 7.Nd4=) 7.Nc3 Qf7 (7...e4 8.Nh4 0-0-0 9.d3 ed3 10.Bd3+=) 8.Be2 Be7 (8...0-0-0 9.d4+/–) 9.0-0 Nh6 (9...a5 10.b5 Na7 11.d4 ed4 12.ed4+/–) 10.Qc2 (10.d4 ed4 11.ed4 0-0-0+/–) 10...Nd8 (10...0-0 11.Nd5+/–) 11.Ne4 (11.d4 ed4 12.ed4 0-0+/–) 11...Ne6 (11...a5 12.Bc3+=) 12.d4 ed4 13.Bd4 (13.ed4 a5+=) 13...Nd4 14.Nd4 f5 15.Nc3 0-0 16.Nd5 Bd8 (16...c5 17.Bf3 Bd6 18.bc5 bc5 19.Rab1+=) 17.Bf3 c6 18.Nc3 (better is 18.Nf4!?+=) 18...Qc4+= 19.Be2 (19.Rac1 Bc7=) 19...Qf7 20.Rad1 d5 (better is 20...Bf6+=) 21.e4?? (better is 21.b5 cb5 22.Ndb5+= (worse is 22.Ncb5 Be7+=; worse is 22.Bb5 Rc8+=)) 21...fe4–+ 22.Ne4 Qg6 (22...de4 A deflection 23.Bc4 A pinning theme) 23.Ng3 Qc2 24.Nc2 a5 (24...Bf6!? 25.b5 cb5 26.Bb5–+) 25.b5–/+ cb5 26.Bb5 Be7 27.a4 Bc5 28.Nd4 Rf6 29.h3 Raf8 30.Bd7 (30.Nh5 Rg6–/+) 30...Ba6 31.Nh5 Rd6 32.Bb5 Bb7 (32...Bd4 33.Ba6 Nf5 34.Rfe1–/+) 33.g4 g6 34.Ng3 Nf7 35.f4 Nd8 36.f5 (36.Nge2 Ne6–+) 36...Nc6 37.Nge2 gf5 38.gf5 Rdf6 (38...Nd4 39.Nd4 Bc8 40.Kh2–+) 39.Kh2 Bd6 (better is 39...Nd4!? 40.Nd4 Bd4 41.Rd4 Rf5 42.Rf5 Rf5–+) 40.Kh1 Ne5 (40...Nd4 41.Nd4 Rc8 42.Rg1 Kf8 43.Rg2–/+) 41.Rg1 Kh8 42.Nf4? (better is 42.Ng3!?–/+) 42...Nf3!–+ 43.Nfe6 (43.Nf3 Theme: Deflection from f5 43...Rf5) 43...Ng1 44.Nf8? (44.Rg1 Rf5 45.Nf8 Rf8–+) 44...Bf8 (better is 44...Nh3 45.Nh7 Kh7–+) 45.Rg1 Bc5 46.Rd1 Bd4 47.Rd4 Rf5 48.Bd7 Rg5 49.Be6 (49.Bb5 Kg7–+) 49...Kg7 50.Kh2 (50.Bg4 Kf6–+) 50...Kf6 51.Bg4 Ke5 52.Rd2 h5 (52...d4 53.Kg3–+) 53.Bf3 (53.Bd1 h4–+) 53...Kf4 (53...h4 54.Rc2–+) 54.h4 Re5 (54...Rf5 55.Bd1–+) 55.Bd1 (55.Rf2 Ke3 56.Re2 Kd4–+) 55...Re4 56.Rf2 (56.Rb2 Rb4 57.Rf2 Ke5–+) 56...Ke5 57.Rf7 Bc6 58.Re7 (58.Kg3 Re3 59.Kh2 Ra3–+) 58...Kf6 59.Re4 de4 60.Kg3 Ke5 61.Bh5 (61.Kf2 Kf4 62.Ke1 Ba4 63.Ba4 Kg4–+) 61...Ba4 62.Bf7 (62.Kf2 Kd4–+) 62...Bd1 63.Kf2 (63.Be8 e3–+) 63...a4 64.h5 Bb3 65.h6 Kf6 (65...Kf6 66.h7 Kg7–+; 65...Bf7? 66.h7 Kf4 67.h8Q e3 68.Ke1+–) 0–1. Schmitt – Ziese,Gerhard, Wuppertal, 1967.

5.Bc4 Bb7 6.Nf3 e4=.

5.d3 Bb7 6.c3 (6.b5 Nd8=) 6...d5 7.f3 (7.Nf3 a6=) 7...f5 8.a4 Nf6 9.Qe2 0-0-0 (9...e4 10.de4 fe4 11.f4=+) 10.h3 (better 10.a5!?=) 10...Nh5–/+ 11.Qf2 d4 12.c4?? (12.b5 de3 13.Qe3 Qh4 14.Qf2 Qf2 15.Kf2 Bc5 16.d4 ed4 17.Ba3–+) 12...Qb4–+ 13.Qd2 de3 14.Qb4 Nb4 15.Na3 (15.g4 Nf4 16.Rh2 Bc5–+) 15...Nd3 16.Bd3 Rd3 17.Be5 (17.Nc2 Rd2 18.Ne3 Bb4–+) 17...Ra3 (17...Ba3 18.Rd1 Bb4 19.Ke2 Rd2 20.Rd2 ed2 21.h4–+) 18.Ra3 Ba3 19.Ne2 Bb4 20.Kf1 (20.Bc3 Bc3 21.Nc3 Rd8–+) 20...Re8 21.Bh2 (21.g4 Bf3 22.gh5 Bh1–+) 21...Bc6 (21...Rd8 22.Nc3 Rd2 23.Be5 Bc3 24.Bc3 Rf2 25.Ke1 Nf4 26.Kd1 Nd3 27.Rf1 e2 28.Kd2 ef1Q 29.Ke3 f4 30.Kd4 c5) 22.g4 (22.Nd4 Ba4 23.Ke2 Bc5–+) 22...fg4 (better 22...Bf3 23.Nd4 e2 24.Ne2 Re2 25.gh5 Re1 26.Kf2 Bh1 27.h6–+) 23.hg4 Bf3 24.Rg1 Be2 (24...Rd8 25.Nd4 Rd4 26.Bg3 Ng3 27.Rg3 Rd1) 25.Ke2–+ Nf6 26.Rg3 (26.Bf4 Re4 27.g5 Rf4 28.gf6 gf6 29.Ke3 Rc4–+) 26...Bd6 27.Rh3 Bh2 28.Rh2 Re4 (28...g5 29.Rh6 Ng4 30.Rh7–+) 29.Kd3 (29.g5 Ng4 30.Rh7 Rc4 31.Rg7 Kd8–+) 29...Rg4 30.Ke3 Rc4 31.Ra2 h5 32.Kd3 Rc5 33.Rg2 g5 34.Rf2 Rc6 35.Rf5 g4 36.Kd4 g3 (36...g3 37.Rf1 h4–+) 0–1. Delboy Smith (1685) – patrese (1875), ChessWorld.net, 2011.

5.Nc3 Nd4 6.Bd3 a5 7.ba5 Ra5 8.Nge2 c6 9.0-0 Ne6 10.f4 d6 (10...b5 11.a4 b4 12.Na2+=) 11.Bc4 Qc7 (11...b5 12.Bb3=) 12.Bb3 Be7 13.d3 Nc5 14.Rb1 Nb3 (14...b5 15.Ba2+=) 15.cb3= 0-0 16.b4 Ra8 17.d4 ef4 18.Nf4 (18.Rc1 Bg4=) 18…d5 (18...b5 19.Qd3=) ½–½. Woschkat,Karl_Heinz – Zaremba,Artur, CiF, 1993.

5.Nc3 d6 6.h3 Be6 7.d3 0-0-0 8.Nf3 g6 9.Be2 Bg7 10.Qd2 Nd4 (10...d5 11.ed5 Nd5 12.0-0=+) 11.0-0-0 (better is 11.Nd4!? ed4 12.Nb5+=) 11...Ne2 12.Qe2 Nd7 13.Qe3 Nb6 14.a4 d5 15.ed5 Nd5 16.Nd5 Bd5 17.b5 Bf3 18.Qf3 Kb8 19.Kd2?? (better is 19.a5=+) 19...e4–+ 20.Bg7 (20.Qf4 Bb2 21.Rb1 Qb4 22.Ke2 ed3 23.Kf3–+) 20...ef3 21.Bh8 Qg5 22.Kc3 fg2 23.Rhg1 Rh8 24.Rde1 0–1. Stiller – Klaus Behrmann (2015), ChessWorld.net, 2003.

5.Nd4 Nd4 6.Bd4 d6 7.e3 Nf6 8.d3 Bg4 9.Be2 h5 10.h3 (10.h3 Be2 11.Qe2+=) 1–0. Fournier,Frederic (2115) – MATADOR1 (1700), Active, 2005.

4.Nc3 Nf6 5.e3 e4 (5...a5 6.Nf3=) 6.f3 (6.Bb5 c6 7.Be2 Be6=) 6...ef3 (6...Be6 7.Bb5 c6 8.Be2+=) 7.Nf3 (worse is 7.gf3 d4 8.Nb5 de3 9.de3 a6 10.Bf6 gf6–/+) 7...Nc6 8.Bb5 g6?? (8...a5!?+=) 9.0-0?? (9.Nd5 Nd5 10.Bh8 Bd7+–) 9...a6?? (9...Rg8 10.Ne2 Bg7 11.Ne5+/–) 10.Bd3 (10.Nd5!? Nd5 11.Bc6 bc6 12.Bh8 c5+–) 10...Bh6? (10...Be6 11.e4 0-0-0 12.ed5 Bd5 13.Nd5 Rd5 14.Bc4+–) 11.Re1?? (better is 11.Nd5 Nd5 12.Bh8+–) 11...0-0+= 12.e4 d4 (12...de4!? 13.Ne4 Ne4 14.Be4 Qd6+=) 13.Nd5 Qd6 14.Bd4?? (better is 14.Nf6 Qf6 15.e5+/–) 14...Ng4?? (better is 14...Nd4 15.Nd4 Nd5 16.ed5 Bg7+=) 15.Bc5+– Qd8 16.Bf8 Kf8 17.c3 (17.h3 Nge5 18.Be2 Nf3 19.Bf3 Nd4+–) 17...Be6 18.Bc4 Nce5 19.Ne5 Ne5 20.d3 (20.Ba2 c6 21.Ne3 Ba2 22.Ra2 Qd3+–) 20...Bg4? (20...c6 21.h3 cd5 22.ed5 Nc4 23.dc4 Bf5+/–) 21.Qb3?? (better is 21.Qc2+–) 21...b5= 22.d4 (22.Qc2 bc4 23.dc4+=) 22...Nc4–+ 23.h3 (23.Rf1 Nd2 24.Qc2 Nf1 25.Rf1 Kg7–+) 23...Nd2?? (better is 23...Be6 24.g3 Qg5–+) 24.Qc2= (24.Qc2 Be6 25.Ne3=). mwojo (1745) – pauldopson, net–chess.com, 2004.

4.c4 dc4=+ 5.e3 Be6 6.Nc3 (6.Be5 a5=) 6...a6 7.Qc2 b5 (7...Nf6 8.Nf3 Nbd7 9.Ne4=+) 8.g3 (8.a4!?=) 8...Nf6 9.Bg2 Ra7 10.Nge2 Bg4 (10...c5 11.bc5 Qc5 12.f4–/+) 11.0-0 (11.f4 Nbd7 12.h3 Be2 13.Ne2 ef4 14.Nf4 Qd6=) 11...c5–/+ 12.h3 Be2 13.Ne2 Nbd7 (13...Rd7 14.bc5 Qc5 15.f4=+) 14.Rfe1 (14.f4 e4=+) 14...g6 (14...cb4 15.ab4 Qb4 16.d4=+) 15.d3 (15.a4!? ba4 16.bc5 Qc5 17.Rec1=) 15...cd3=+ 16.Qd3 c4 (16...Bg7 17.Rec1=+) 17.Qc3 Bg7 (17...Rc7 18.Red1=+) 18.Rad1 (better is 18.a4!? ba4 19.Ra4=) 18...0-0=+ 19.Rd2 e4 20.g4 (20.Qc2 Re8=+) 20...Rc7–/+ 21.g5? (better is 21.Red1–/+) 21...Nh5 22.Qc2 Bb2 23.Qb2 Qg5 24.Kh2 (24.Qd4 Re8–+) 24...f5 (24...Ne5 25.Rg1 Nd3 26.Qd4–+) 25.Nd4 (25.Red1 Rf7–+) 25...Re8 26.Red1 c3 (26...f4 27.Qc3–+) 27.Qc1? (better is 27.Qb3!? Kh8 28.Rc2–/+) 27...Qh4 (27...Nf4 28.Bf1 Ne5 29.Rc2–+) 28.Rc2 Ne5 29.Kg1 Nd3 (29...Rec8 30.Qb1–+) 30.Qa1 (better is 30.Rd3 ed3 31.Rc3 Rc3 32.Qc3–+) 30...f4 31.Rf1 (31.Be4 Re4 32.Rd3 fe3 33.Re3 Qg5 34.Kh2 Qe5 35.Kh1–+) 31...f3 32.Bh1 (32.Nf3 ef3 33.Bf3 Qh3–+) 32...Ne5 (better is 32...Qg5 33.Kh2 Nf2–+) 33.Rc3 Rc3 (33...Qh3 34.Qa2 Nc4 35.Nf3 ef3 36.e4 Qg4 37.Kh2 Qh4 38.Kg1 Qg5 39.Kh2 Re4 40.Rf3 Rh4 41.Rh3 Qf4 42.Kg1 Rh3 43.f3–+) 34.Qc3 Ng3! 35.Re1 (35.fg3 Qg3) 35...Nh1 0–1. Davis,David – Doeh,Cole Adam, internet, 1999.

4.d3 c6 5.Nf3 Nd7 6.e3 h6 7.Be2 Ngf6 8.0-0 Qe6 9.Re1 Bd6 10.Nbd2 Bc7 11.c4 b6 12.h3 dc4 13.dc4 Bb7 14.Qc2 0-0 15.Bf1 Rfe8 16.Rac1 Red8 17.Rcd1 c5 18.e4 Nf8 19.Re3 cb4 20.ab4 Rd7 21.Nh4 Rad8 22.Nf5?? (better is 22.Nhf3+=) 22...Ne4!–+ 23.Nh6?! (23.Ne4 Rd1 Pinning (23...Rd1 Deflection; 23...Qf5 Remove defender); 23.Re4 Be4 Double attack (23...Qf5 Remove defender)) 23...Qh6 24.Bc1 Nf6 25.Rde1 Ne6 26.Ne4 (26.Nb3 Nf4–+) 26...Ne4 (worse is 26...Be4 27.Re4 Qg6 28.R4e2–+) 27.Re4 Qf6 (better is 27...Be4 28.Qe4 Qf6–+) 28.Bb2 (28.Rg4–+) 28...Be4 (better is 28...Rd2 29.Qd2 Rd2 30.R4e2 Re2 31.Re2–+) 29.Qe4 Nd4 (better is 29...Rd2 30.Re2 Nf4 31.Bc3 Ne2 32.Be2–+) 30.Bd3 g6 31.Re3 a6 32.Bf1 Re7 33.Bd4 Rd4 (33...ed4?! 34.Qe7 Qd6 35.Qd6 Bd6 36.Rb3+=) 34.Qb7 (34.Qa8 Kg7 35.Qa6 e4–+) 34...a5 35.ba5 ba5 36.Rf3 Qg7 37.c5 (37.Qa8 Kh7 38.Re3 e4–+) 37...f5 (better is 37...e4 38.Rg3–+) 38.Rc3 e4 39.Qb3 Kh7 40.Qc2 Qe5 41.g3 Red7 42.Qc1 (42.Qb3 Rd2 43.c6 Qd4–+) 42...Rd1 43.Qe3 R7d4 44.Rb3 (44.f4 ef3! 45.Qe5 Be5 46.Rf3 R4d2–+) 44...a4 45.Rb7 Qc5 46.Qg5 (46.Kg2 a3 47.Rc7 Qc7 48.Qa3 Rb1–+) 46...Rd7 47.Kg2 Bb6 (47...R1d2 48.Qh4 Kg8 49.Bc4 Qc4 50.g4 Qc3 51.Qh5 Qf3 52.Kg1 Rd1) 48.Qh4 Kg7 (48...Kg7 49.Rd7 Rd7–+) 0–1. brainstorm (2355) – grahamtrue (2125), net–chess.com, 2011.

4.d3 Nd7 5.Nd2 b6 6.e4 Bb7 7.Ngf3 Ngf6 8.ed5 Bd5 9.Be2 e4 (9...c5!?=) 10.de4+= Ne4 11.Ne4 Be4 12.0-0 0-0-0 13.Bd3 Ne5?? (better 13...Bb7+=) 14.Ne5+- (14.Be4?! Rd1 15.Rfd1 Nf3 16.Bf3 Qg5=; worse 14.Be5 f6 15.Bg3 Bd3 16.cd3 Qd7+-) 14...Qe5 (14...f6 15.Re1 Bd3+-) 15.Be5 (15.Be5 Bd3 16.cd3+-) 1-0. kassanen (1800) - dhshchdh (1905), Casual Blitz game, lichess.org, 2021.

4.d3 f5 6.e3+= g6 7.Be2 (7.c4 Ngf6+=) 7...Bg7 8.0-0 Nh6 (8...Ngf6 9.c4=) 9.c4+= c6 (9...dc4 10.dc4 0-0 11.c5+=) 10.Nc3 (10.cd5 cd5 11.Qb3 Nb6+/-) 10...e4 (10...dc4 11.dc4 e4 12.Nd4+=) 11.Nd4+/- ed3 (11...dc4 12.de4 Nb6 13.Qc2+/-) 12.Bd3 (12.Qd3?! Ne5 13.Qc2 Nc4 14.Bc4 dc4=) 12...dc4 13.Bc4 Ne5 (13...Nb6 14.Bb3 Bd7 15.Qc2+/-) 14.Bb3 Nhf7 15.f4 (15.e4!? 0-0 16.ef5 Bf5 17.Nf5 gf5 18.Qc2+/-) 15...Ng4+= 16.Re1 0-0 17.Qd2 Kh8 (17...a5 18.Na4 ab4 19.ab4+/-) 18.h3 (better 18.e4!? Qh4 19.Nf3+-) 18...Nf6+= 19.Rad1 Rd8 20.Qf2 (20.Na4 Nd6+=) 20...Nd6 (20...a5 21.ba5 c5 22.Ndb5+/-) 21.Bc2 (21.Qh4+=) 21...Be6 (better 21...a5=) 22.Rd2?? (better 22.e4 fe4 23.Be4+-) 22...Nc4-/+ 23.Bc1 (23.e4 A) 23...Nb2?! 24.ef5 Nc4 25.Rdd1 (25.fe6? Nd2 26.Qd2 Nh5-+) 25...Na3 26.Ne6 (26.fe6 Nh5 27.Bb3 Qb4=; 26.Re6? Qb4 27.Na2 Qb6-+) 26...Rd1 27.Bd1=; B) 23...Nd2 24.ef5 Nc4-+) 23...Nd2-+ 24.Bd2 (24.Ne6 Qe6 25.Bd2 a5 26.ba5 Qc4-+) 24...Bf7 (24...Bc4 25.g4 fg4 26.Qh4 gh3 27.Bg6 Rd4 28.ed4-+) 25.Kh2 (25.Nf3 Ne4 26.Ne4 fe4-+) 25...Rd7 26.Nf3 Nd5 (26...Ne4 27.Ne4 fe4 28.Nd4-+) 27.Nd5 (27.Na4!? b6 28.e4 fe4 29.Re4-/+) 27...Bd5-+ (27...Rd5?! 28.e4 fe4 29.Be4=) 28.Kh1 (28.e4 Be4 29.Ng5 Qd6 (29...Bc2? 30.Re7 Re7 31.Qc5+-) 30.Ne4 fe4-+) 28...Bf3 29.gf3 Rad8 30.Re2 Qf6 31.e4 (31.Qe1 Qe6-+) 31...Qb2 32.Be1 (32.Be3 fe4 33.Be4 Qa3 34.b5 cb5 35.Ba7 Qc1 36.Kg2 Qf4 37.Be3-+) 32...Qd4 (better 32...fe4!? 33.fe4 Qa3 34.Kg2-+) 33.ef5 (33.Qd4 Rd4 34.Kg2 fe4 35.fe4 a6-/+) 33...Qf2-+ (33...Qf4?! 34.fg6 hg6 35.Re4-/+) 34.Rf2 (34.Bf2?? Rd2 35.Rd2 Rd2 36.Ba7 Rc2 37.fg6 hg6-+) 34...Re7 35.Bd2 gf5 (35...Rde8 36.Bd3 (36.fg6?? Re2 37.Rh2 Rh2 38.Kh2 Re2 39.Kg3 Rd2-+) 36...gf5 37.Rg2-+) 36.Bf5-/+ Bd4 37.Rg2 Rg8 38.Bg4?? (better 38.Be4-/+) 38...h5!-+ 39.Bh5 (39.a4-+) 39...Rg2 40.Kg2 Re2 (40...Re2 41.Kg3 Rd2-+) 0-1. RICIAN (2240) - audy08 (2305), Rated Blitz game, lichess.org, 2017.

4.d3 Bf5 5.Nd2 Nd7 6.Ngf3 Ngf6 7.g3 Bg4 8.Bg2 h5 9.0-0 g5 10.c4 h4 11.Ng5 Bh6 12.Ngf3 h3 13.Bh1 Bd2 14.Qd2 e4 15.de4 de4 16.Ne1 0-0-0 17.Qe3 Rde8 18.Rd1 Nb6 19.Nc2 Kb8 20.Rd4 Rd8 21.Rfd1 Nc4 22.Qc3 Be2 23.Rd8 Rd8 24.Rd8 Qd8 25.Ne3 Ne3 26.fe3 Qd1 27.Kf2 Qf1 Normal 0-1. alica67 (1815) - maxpiz5 (1665), Rated Blitz game, lichess.org, 2016.

4.d3 Nf6 5.e4 Bg4 6.Nf3 Nc6 7.h3 Bf3 8.Qf3 Nd4 9.Bd4 ed4 10.Be2 0-0-0 11.ed5 Rd5 12.0-0 Qe5 13.Re1 Ne4 14.de4 Bd6 15.g3 Time forfeit 1-0. zashelpoigrat - Loshad1257, Rated Classical game, lichess.org, 2015.

4.d4 ed4 5.Nf3 Nf6 6.Nd4 g6 (6...a5 7.b5=) 7.c4+= dc4 8.e3 Be6? (better is 8...Bg4 9.Qc2 a5+=) 9.Ne6+– Qe6 10.Bc4! Qf5 (10...Qc4 11.Qd4 Double attack (11.Bf6 Deflection; 11.Qd4 Decoy; 11.Bf6 Overloading)) 11.Bd3 Qg4?? (11...Qg5 12.Qf3 Nbd7+–) 12.Qg4 Ng4 13.Bh8 Nc6 14.Be2 f5 15.b5 Nce5 (15...Nd8 16.h3 Nh6 17.Nd2+–) 16.h3 Nh6 (16...Ne3 17.fe3 Bd6 18.Nc3+–) 17.Be5 0-0-0 18.Nd2 Nf7 19.Bd4 c5 (19...Rd7 20.Nb3+–) 20.bc6! bc6 21.Ba7 Kb7 22.Bd4 Ra8 23.Nc4 Nd6 24.Rb1 Kc7 25.Be5 h5 26.Rd1 Rd8 27.g4 fg4 28.hg4 1–0. marekt – TiagoWehmuth, ChessWorld.net, 2004.

4.e3 b5 5.Nf3 (5.Bb5 Bd7 6.Be2 e4+/–) 5...Bg4 (better is 5...e4!? 6.Nd4 c6=) 6.Bb5+/– c6 7.Bf1 e4 8.h3 Bf3 9.gf3 f5 10.fe4 Qe4 (better is 10...fe4!? 11.d3 a5 12.de4 de4+–) 11.Rg1+– Ne7 12.Qh5 g6 13.Bd3 gh5? (better is 13...Qe6 14.Qh4 Rg8+–) 14.Be4 Bg7 (14...fe4 15.Bh8 Ng6+–) 15.Bg7 Rg8 16.Bf3 Kf7 17.Bh5 Ng6 18.Bd4 Nd7 19.f4 Nf6 20.Be2 Nh4 21.Rg8 Ng8 (21...Rg8 22.Nc3+–) 22.Nc3 White prepares b5 22...Ne7 23.Rb1 White plans b5 23...Rg8 24.Ba7 Ra8 25.Bc5 Ra3 26.b5 Ra2 (26...Rc3 27.dc3 cb5 28.Rb5 Nhg6+–) 27.Na2 Ng2 28.Kf2 Nh4 29.b6 (29.b6 Nhg6 30.b7+–) 1–0. Klaus Behrmann (2250) – Jan van Dijk, ChessWorld.net, 2003.

4.e3 b6 5.c4 Nf6 6.d3 Bb7 7.Nf3 Nbd7 8.Nfd2 (8.cd5 Nd5 9.Qc2 Rc8=) 8...c5 9.b5 d4 10.e4 Qd6 11.Nf3 h6 12.Nbd2 Be7 13.Nh4 g5 (better is 13...g6!?=+) 14.Nf5+= Qc7 15.Ne7 (15.Be2 Bd6+=) 15...Ke7= 16.h3 Ne8 (16...a6 17.ba6 Ra6 18.Be2=) 17.Nf3 (17.Be2 Kd8+=) 17...Nd6 18.h4 Raf8 (18...g4 19.Nd2 Rhg8 20.Be2=) 19.hg5+= hg5 20.Rh8 Rh8 21.Ng5 f6 22.Nh3 f5 (22...Kd8 23.Qa4+=) 23.f3 (23.ef5 Nf5 24.Qa4 e4+=) 23...Kd8 (23...f4 24.Qa4+=) 24.Bc1 (24.Ng5 Kc8=) 24...Nf6 25.Bg5+/– Qg7 26.Bf6 Qf6+= 27.Be2 Qh4 28.Kd2 Qg3=+ 29.Qf1 Rg8 30.a4 Qh4 31.a5= Qh6 32.Kc2 fe4 33.de4 Qe3 34.Bd3 Nc4?? 35.Bc4+– Qc3 36.Kb1 Qd2?? 37.Nf2 Rg2 38.Qg2 Qb4 39.Kc1 Qc4+/– 40.Kd1 Qb3= 41.Ke1 Qc3–/+ 42.Kf1?? (42...Qa1 43.Ke2 Qa2 44.Kd1 Qa4 45.Kc1 Qa1 46.Kc2 Qc3 47.Kd1 Qb3 48.Kc1 Qe3 49.Kc2–+; 42.Ke2 Qa1 43.Qg8 Kd7 44.Nd3+=) 1–0. maxii – destoyer1, Live Game Caissa's Web, 2004.

4.e3 Bd7 5.c4 Nf6 6.Nf3 e4 7.Nd4 c6 8.d3 g6 (8...dc4 9.dc4 c5 10.bc5=) 9.de4 (9.cd5 cd5 10.de4 de4 11.Nb5 Bb5 12.Bb5 Nc6 13.Bc6 bc6 14.Qc2+/-) 9...Ne4? (9...de4 10.Be2+=) 10.Bd3 (10.Nc6!? Bc6 11.Bh8 dc4 12.Bc4 Nf2 13.Kf2 Qh4 14.Kg1 Qc4+/-) 10...Nf6 (10...dc4 11.Bc4 Nd6 12.Bb3+=) 11.Qf3 (11.cd5 cd5 12.Nb5 Na6+/-) 11...Bg7 12.0-0 0-0 13.cd5 Nd5 14.Bc4 (14.Nc3 Nf6+=) 14...Be6 15.Bd5 (15.Qg3 Nd7+=) 15...Bd5= 16.Qg3 Nd7?? (16...f5 17.Rd1=) 17.Nd2?? (better 17.Nf5! Qe4 18.Ng7+- (18.Bg7?! Qf5 19.Bf8 Rf8+-)) 17...Nf6 18.N2f3 (18.Rfe1 Nh5 19.Qh3 f5=) 18...Ne4=+ 19.Qh4 Rae8 20.Qe7 Re7 21.a4 (21.Rfd1 Rd8=+) 21...Nd6 (21...a5 22.ba5 c5 23.Ba3-/+) 22.b5 (22.Rad1 Rd8-/+) 22...Nc4 (22...c5 23.Ba3 b6-/+ (23...cd4 24.Bd6 de3 25.Be7+/-)) 23.Bc1? (better 23.Bc3 Rc8 24.Rfc1-/+) 23...c5 24.Nb3 Bf3 25.gf3 Ba1 26.Na1 Rd7 27.Nb3 (27.e4 Rc8-+) 27...b6 28.f4 (28.e4 Rd3 29.Na1 a6-+) 28...Rd3 29.Na1 Rfd8 30.Kg2 (30.Re1 a6! 31.e4 ab5 32.ab5 Nd6-+) 30...Rc3 (30...Rd1 31.Nb3-+) 31.a5 (31.f5 a6 32.e4 Ra8-+) 31...Na5 32.Kg3 (32.Bb2 Rc4-+) 32...f5 (32...Nc4 33.Kh4-+) 33.h3 (33.Bb2 Rcd3 34.Bf6-+) 33...Nc4 34.Kh4 h6 (better 34...Ra8 35.e4 fe4-+) 35.Ba3 (35.Rg1-+) 35...Na3 36.Nc2 (36.Kg3 Kf7-+) 36...Nc2 37.Rc1 Rd2 38.Kg3 Rcd3 39.h4 Nb4 (39...Ne3 40.Kh2 Rf2 41.Kh1 Rdd2 42.Kg1 Rg2 43.Kh1 Rh2 44.Kg1 Rdg2) 40.h5 gh5 41.Kh4 (41.Kh4 Rf2 42.Rg1 Kf7 43.Rg5 Re3 44.Rf5 Kg6 45.Rf6 Kf6 46.Kh5 Rh2 47.Kg4 h5). gregoire (1615) - landish13, Rated Blitz game, lichess.org, 2015.

4.e3 Be6 5.d4 e4 6.Ne2 Nf6 7.Nf4 Nbd7 8.g3 g5 (8...Bg4 9.Be2 h5 10.Nd2=+) 9.Ne2 (9.Ne6!? Qe6 10.c4=) 9...Bg7 10.c3 (10.h4 g4-/+) 10...0-0 (10...Nb6 11.Nd2-/+) 11.Nd2 Bg4 (11...a5 12.ba5 Ra5 13.c4=+) 12.Qc2 Qe6 (12...a5 13.b5=) 13.h3 Bh5 14.g4 Bg6 15.Ng3 c6 (better 15...a5=) 16.0-0-0 (better 16.Be2!?=) 16...a5-/+ 17.f4? (better 17.b5-/+) 17...Ng4?? (better 17...ef3 18.Nf5 ab4 19.cb4 f2-+) 18.hg4+= Qg4 (18...gf4 19.Nf5 ab4 20.cb4 fe3 21.Ne3 Qf6+/-) 19.f5 (better 19.Ne2!?+/-) 19...Bf5 (19...Qg3 20.fg6 fg6 21.Bh3=) 20.Nf5 Qf5 21.Bh3 (21.Nb3 ab4 22.cb4 Qf3+=) 21...g4= 22.Rdf1 Qg6 (22...Qg5 23.Rhg1 f5 24.Re1=+) 23.Rfg1 f5 24.Bf1 (24.Kd1 Qg5 25.Ke2 Nf6=) 24...ab4 (24...Bh6 25.Rg3 Nf6-/+) 25.cb4= (worse 25.ab4 Bh6 26.Rg3 Nf6-/+) 25...Qg5 26.Kb1?? (better 26.Qb3=) 26...Qe3-/+ 27.Nb3 Nb6 (better 27...g3 28.Bc1 Qf3-/+) 28.Bg2?? (better 28.Bc1 Qf3 29.Be2=) 28...Nc4-+ 29.Re1 Qg5 (29...Qg3 30.Na5 Na3 31.Ba3 Qa3 32.Qd2-+) 30.Rhg1 (30.Ka2 Qe7 31.Qc3 Nb2 32.Kb2 f4-+) 30...Na3 31.Ba3 Ra3 32.Kb2 (32.Qb2 Rfa8 33.Na5 Rd3-+) 32...Rfa8 33.Ra1 (33.Qc3 Qf4 34.Ref1 Qh2-+) 33...Ra1 34.Na1 (34.Ra1 Ra1 35.Ka1-+) 34...Bd4 35.Qc3 Bc3 (35...Qd2 36.Kb1 Qc3 37.Be4 Ra1) 36.Kc3 Qe3 37.Kb2 Qg1 (37...Qd4 38.Kb3 Qc4 39.Kb2 Ra2 40.Kb1 Qe2 41.Be4 Qb2) 38.Nc2-+ Qg2 39.Kc3 Qf3 40.Kd4 Qd3 41.Ke5 (41.Ke5 Qc2 42.Kd6 Qb2 43.b5 Qf6 44.Kc7 Qe7 45.Kb6 cb5 46.Kb5 Qc7 47.Kb4 Qc4). gregoire - martinz (1670), Rated Blitz game, lichess.org, 2014.

4.e3 f5 5.c4 c6 (5...Nf6 6.Nf3 Nbd7 7.cd5 Nd5 8.Nc3 Nc3 9.Bc3=) 6.Nf3 Nf6 (6...e4!? 7.Ne5 Nf6+=) 7.Ne5 Be6 8.d3 g6 9.Nd2 Bg7 10.Be2 0-0 (10...Nfd7 11.Ndf3+/–) 11.0-0 Nbd7 12.Ndf3 Rad8 13.Qc2 dc4 14.Nc4 Bd5 15.Na5 (15.Rac1 c5 16.bc5 Nc5+/–) 15...Nb8 (15...c5 16.Rfc1 b6 17.Nb3+/–) 16.Ne5 Ne8 17.Nec4 (17.d4 Be5 18.de5 Qg5+/–) 17...Nf6 18.Rfe1 b6 19.Nb3 Nbd7 20.Nd4 Rfe8 21.Bf3 Rc8 22.Qe2 Bc4 23.dc4 Ne5 24.b5 cb5 25.cb5 Ne4 26.Rac1 Qf6 27.Be4 fe4 28.Nc6 Qg5 29.Be5 (29.Na7?! Nf3 30.Kh1 Ne1 31.Re1 Rc5=) 29...Be5 30.Na7 Ra8 31.Qa2 Kh8 32.Nc6 Bg7 33.Qb3 Rf8 1–0. Roggensack_Hanspach,Peter – Zylla,Johannes, corr SOK–92–79, 1992.

4.e3 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Qe7).

4.e4 d4 5.Bc4 Nf6 6.d3 a6 7.c3 Nc6 8.cd4 Nd4 9.f4 Bg4 10.Kf1 0-1. staboola - beatnik8983 (1725), Rated Classical game, lichess.org.

4.f3 Bd7 5.e3 a6 6.c3 (6.Ne2 Nf6=+) 6...Nf6 7.a4 (7.c4 Nc6=+) 7...g6 (7...Qe6 8.g4–/+) 8.d3 Nc6 9.Qb3 (9.b5 Na5=+) 9...Be6 (9...d4 10.Ba3 Be6 11.Qc2–/+) 10.d4 Bh6 (10...ed4 11.ed4 Bh6=+) 11.Kf2?? (better 11.b5 ab5 12.ab5 Ra1 13.Ba1=) 11...ed4–+ 12.cd4 White fights for the Initiative 12...0-0 (better 12...Qb4!? 13.Ra3 Bf8–+) 13.Ba3=+ b5 (better 13...Qd7!?=+) 14.ab5+= Nd8? (better 14...ab5 15.Bb5 Nb8+=) 15.ba6+– Qd7 16.b5 Re8 17.Nd2 Bf5 18.f4?? (18.Re1 Rb8+–) 18...Qe6?? (18...Ng4 19.Kf3 Re3 20.Qe3 Ne3 21.Ke3 Ne6–+) 19.h3+– Qb6 20.g4 (20.Bc5 Qe6+–) 20...Be4 (20...Ne4 21.Ne4 Be4 22.Bg2 Ra6 23.Bc5 Ra1 24.Bb6 cb6 25.Nf3+–) 21.Ngf3 g5 (21...Bf3 22.Kf3 Ne4 23.Qc2+–) 22.f5 (22.Ne4 Ne4 23.Kg2 c6+–) 22...c6 (22...Bf8 23.Bf8 Rf8 24.Bg2+–) 23.bc6 (23.Ne4?! Ne4 24.Kg1 Qb8+–) 23...Qc6 (23...Qc7 24.Bb5 Bf3 25.Kf3 Nc6+–) 24.Bb5 (24.Ne4 Ne4 25.Kg1 Qc7+–) 24...Qb6 25.Be8 Qb3 26.Nb3 Ne8 27.Nc5 (27.Rhc1 Bf3 28.Kf3 Bf8+–) 27...Nc7 (27...Nf6 28.Rhc1+–) 28.Bb2 (28.Rhc1 Bf3 29.Kf3 Bg7+–) 28...Nc6 (28...Bf3 29.Kf3 Bf8 30.Rhc1+–) 29.Ne4 Nb4 (29...de4 30.Rhc1 Na7 31.Rc7 ef3 32.Rb7+–) 30.Nc5 Nc2 (30...Nca6 31.Bc3 Rc8 32.Na6+–) 31.Ra5 (better 31.Ra4 Rb8 32.Bc3 Re8+–) 31...Ne8 (31...Nb4 32.Bc3 Nc6 33.Ra2+–) 32.Ne5 (32.Bc3!? Nd6 33.Ra2 Ne4 34.Ne4 de4+–) 32...Nd6 (32...Bf8 33.Bc3 Nd6 34.Ra2 Ne4 35.Ne4 de4 36.Nd7+–) 33.Ba3 (better 33.Ra4 f6 34.Ned7 Nc4 35.Nf6 Kf8 36.Ncd7 Kf7+–) 33...Bg7 34.Ncd7 (34.Rc1!? Na3 35.Ra3 Be5 36.de5 Nc4+–) 34...Ne4 35.Kf3 f6 (35...Be5 36.Ne5 f6 37.Rd1 fe5 38.de5+–) 36.Nd3 (better 36.Nb6 Re8 37.a7 fe5+–) 36...Kf7 (36...Nd2 37.Ke2 Nc4 38.Rd5 N2a3 39.N7c5+–) 37.a7 (better 37.Bc1 Nd6+–) 37...Rd8 (37...Nd2 38.Ke2 Nc4+–) 38.Nb6 (38.Nb6 Na3 39.Rd5+–; better 38.Nb8 Nd2 39.Ke2 Nc4+–) 1–0. Delboy Smith (1735) – Ahasverus (1610), ChessWorld.net, 2010.

4.Nf3 Be6 5.Ne5+= Bf5 (5...f6 6.Nf3+=) 6.e3+/– Qf6 (6...Nd7 7.Bd3+/–) 7.c4 (7.Be2 Bd6 8.Nc4 Qg6 9.Nd6 cd6+–) 7...Nc6 (7...Bd6 8.f4 Nd7 9.Qa4 Be5 10.Be5+/–) 8.d4 (8.Qa4 0-0-0 9.Nc6 Qb2 10.Nd8 Kd8 11.Qb5–+) 8...Ne5 (better is 8...0-0-0!?+/–) 9.de5+– Qe6 (9...Qe7 10.cd5 0-0-0 11.e4+–) 10.cd5 Qb6 (10...Qd7 11.Nc3 a6 12.e4+–) 11.Nc3 a5 (11...Rd8 12.Be2+–) 12.Na4 (12...Qg6 13.Nc5 ab4 14.ab4 Ra1 15.Qa1+–) 1–0. Wall,Bill – Autumn, internet, 2003.

4.Nf3 Bg4 5.e3 e4 6.h3 ef3 7.hg4 fg2 8.Bg2 Nf6 9.g5 Ne4 10.Be4 Qe4 11.Qh5 Qc2 12.Be5 Nd7 13.Bc3 0-0-0 14.Qf7 Qe4 15.Qh5 g6 16.Qh2 Rg8 17.Bd4 Bg7 18.Bg7 Rg7 19.Nc3 a6 20.Ne4 de4 21.Rc1 c6 22.Qd6 Nb6 23.Rc6 bc6 24.Qc6 Rc7 25.Qb6 Rc1 26.Ke2 Rh1 27.Qa6 Kd7 28.b5 Rc1 29.b6 Rc6 30.Qb5 Rb8 31.Qd5 Rd6 32.Qf7 Kc6 33.Qc7 Kd5 34.Qb8 Rb6 35.Qb6 Time forfeit 1-0. tsarclockwork - newschess93, Rated Classical game, lichess.org, 2015.

5.c3 dc3 6.Bc3 Nc6 7.Qa4 Bd7 8.b5 Nd4 9.Bd4 ed4 10.Nf3 a6 11.Nd4 Qe5 12.Nc3 (12.Ra2=) 12...c5 (better 12...Bc5!? 13.e3 Bd4 14.Qd4 Qd4 15.ed4 ab5=+) 13.bc6+= Bc6 14.Qc4 Ne7 (14...Bd7 15.f4 Qa5 16.Nb3=) 15.Nc6 Nc6 16.e3 Bc5 (16...Qa5 17.Qb3+=) 17.Be2 (17.Qe4 Qe4 18.Ne4 Be7+–) 17...Qg5 (17...0-0!? 18.Qb3 Rfc8+=) 18.0-0 0-0?? (better 18...Bd6+–) 19.Ne4+– Qe7 20.Qc5 Qc5 (20...Rfe8 21.Rfb1+–) 21.Nc5 b5 22.h3 (22.d4 Ra7+–) 22...g6 (22...Nd8 23.d4 Ne6 24.Rfd1+–) 23.Bf3 Rfc8 24.Bc6 (24.d4!? h6+–) 24...Rc6 25.d4 Kg7 (25...Rac8 26.Rfb1 Kf8 27.a4+–) 26.g4 (26.a4 b4+–) 26...Ra7 (26...Rac8 27.e4+–) 27.f4 (27.a4 b4 28.a5 Ra8+–) 27...a5 (27...f5 28.Rac1+–) 28.h4 (28.Rfb1 Rb6+–) 28...h6 (28...f5 29.gf5 gf5 30.Rfb1+–) 29.Kg2 (29.Rfb1 Rb6+–) 29...Rd6 (29...f5 30.Rfb1 Rb6 31.Kf3+–) 30.Rfd1 (30.Kf3 Rb6+–) 30...f6 (30...f5 31.Kf3+–) 31.Kf3 h5 (31...Ra8 32.e4+–) 32.gh5 gh5 33.d5 Kf7 34.e4 a4 (34...Rc7 35.Rac1 Re7 36.Rb1+–) 35.Rab1 Rb6 36.d6 Rb8 37.d7 Rd8 38.Rb5 Ke7 39.Rb6 (better 39.Rd5 Rc7+–) 39...Rg8 (39...Rc7 40.Rd5+–) 40.f5 Rc7 41.Re6 (better 41.Rb7 Rb7 42.Nb7 Rb8+–) 41...Kd8 (41...Kf7 42.d8B Rd8 43.Rd8 Rc5 44.Rd7 Kf8 45.Rf6 Kg8 46.Rg6 Kh8 47.Rh6 Kg8 48.f6 Rc3 49.Kf4 Rc8 50.Rg7 Kf8 51.Rh8) 42.Na4 (42.Ra6 Ke7 43.Rg1 Rc5 44.Rg8 Kd7 45.Rg7 Kd8 46.Raa7 Rc3 47.Kf4 Rc7 48.Rac7 Ke8 49.Rg8) 42...Rc4 (42...Rd7 43.Rd7 Kd7 44.Nb6 Kd8 45.Nd5+–) 43.Ra6 Ke7 44.Ra7 Rd8 45.Ke3 (45.Nb6 Rc5+–) 45...Rc2 (45...Rc6+–) 46.Kf3 (46.Nb6 Rc5+–) 46...Rc4 47.Rd5 Rc1 48.Rc5 (48.Nc5!? Rc5 49.Rc5 Rd7 50.Rd7 Kd7+–) 48...Rd1 (48...Rf1 49.Ke2 Rh1+–) 49.Rd5 (49.Nb6 Rd3 50.Kf4 R8d7 51.Rd7 Rd7 52.Nd7 Kd7 53.e5 Ke7 54.Ra5 Kd7 55.ef6 Kc7 56.f7 Kd6 57.f8Q Kc7 58.Rc5 Kb7 59.Qc8 Ka7 60.Qc7 Ka6 61.Ra5) 49...Rf1?? (49...Rc1 50.Nc5 Rc3 51.Kf4 Rc5 52.Rc5 Rd7+–) 50.Ke3 Re1 51.Kf3 (51.Kd4 Rd1 52.Kc5 Rc1 53.Kb5 Rb8 54.Nb6 Rb1 55.Ka5 Rd8+–) 51...Rf1?? (better 51...Rc1=) 52.Kg2 (52.Ke2!? Rf4 53.Nc5 Rh4+–) 52...Rf4 53.Nb6 (better 53.Kg3 Rg4 54.Kf3 Rh4 55.Nc5 Rh3 56.Kg2+–) 53...Rg8= 54.Kh3 Threatening mate... how? 54...Rf3 55.Kh2 Rf2 56.Kh1 ½–½. Delboy Smith (1710) – ed wildman (1990), ChessWorld.net, 2011.

5.e3 Qd6 6.e4 Be6 7.Be2 Nc6 8.Nf3 0-0-0 9.b5 Nce7 10.a4 f5 11.Ng5 fe4 12.Ba3 Qd5 13.Bg4 Bg4 14.Qg4 Kb8 15.c4 Nf6 16.Qd1 Qg8 17.a5 h6 18.Ne4 Ne4 19.de4 Qc4 20.Nd2 Qd3 21.b6 cb6 22.ab6 a6 23.Nb3 Qc3 24.Kf1 Nc6 25.Rc1 Ba3 26.Rc3 dc3 27.Qc2 Bb4 28.h4 Rd2 29.Nd2 cd2 30.Qd1 Rc8 31.Rh3 Nd4 32.Rd3 Rc1 33.Rd2 Rd1 34.Rd1 a5 35.Rd3 Kc8 36.Rg3 Ne6 37.Rg7 Ng7 38.f4 Ne6 39.fe5 Bc3 40.h5 Be5 41.g4 Bf4 42.g5 Bg5 43.e5 Kd7 44.Kg2 Kc6 45.Kh3 Kb6 46.Kg4 Kc5 47.Kf5 Kd5 48.Kg6 Ke5 49.Kf7 Kf4 0-1. virtualintrepid - arash6613 (1650), Rated Bullet game, lichess.org.

5.Nc3 Be6 6.e3 f5 7.Nge2 Nf6 8.Nf4 c6 9.Be2 Nbd7 10.0-0 g6 11.b5 Bg7 12.a4 0-0 (better is 12...Bf7!?+=) 13.Ba3+– Qf7 14.Bf8 Qf8?? (better is 14...Nf8 15.f3 ef3 16.Rf3 Bd7+/–) 1–0. Trkn – guest1421, ICC, 2004.

5.Nc3 Nf6+= 6.e3 a5 7.b5 b6 (7...Qd8 8.Na4+=) 8.Be2 Bd7 9.h3 (9.Na4 Qe6=) 9...c6 10.bc6 Bc6 11.Rb1 Nbd7 12.h4 Rb8 13.Nh3 b5 14.Bc1 b4 15.ab4 ab4 16.Na2 Qd8 17.Bd2 Qa5 18.Ra1 (18.Rb2 Bb5=) 18...Ba4 19.Nc1 Nb6 (19...Ra8 20.g4+=) 20.Nf4 (20.Nb3!? Qa8 21.Bb5 Bb5 22.Ra8 Na8 23.Qa1+=) 20...Nc4= 21.Nb3 Nd2?? (21...Qb5=) 22.Na5+– (22.Qd2?! Qa8=; 22.Nd2 Qa8+=; 22.Kd2 Qa8+=) 22...b3 (22...Bd7 23.Qd2 Bd6 24.Nb3+–) 23.Ra4 b2 24.Kd2 Bb4 25.Rb4 Rb4 26.Nb3 (26.Nb3 0-0 27.Qe1+–; 26.Qb1 0-0+–) 1–0. mtra – keighley, internet, 2002.

5.Nc3 Nf6 6.e3 Bd7 7.Nb5 Na6 8.c4 c6 9.Nc3 Be6 10.cd5 Nd5 11.Ne4 Qc7 12.Nc5 Nc5 13.dc5 a5 14.Nf3 ab4 15.ab4 Ra1 16.Qa1 Nb4 17.Qa8 Bc8 18.Be5 Qd7 19.Nd4 f6 20.Bd6 Bd6 21.cd6 0-0 22.Bc4 Kh8 23.Ne6 Re8 24.Nc7 Rd8 25.0-0 b5 26.Be6 Qd6 27.Bc8 Qc7 28.Qb7 Rc8 29.Qc7 Rc7 30.Rc1 c5 Normal 0-1. dimonchyck2000 – Pjridao, Rated Classical game, lichess.org, 2015.

5.Nc3 Nf6 6.e3 Bd7 7.Nge2 Nc6 8.Nf4 Be6 9.Bb5 Qd7 10.Ne6 Qe6 11.0-0 Bd6 12.f4 (12.Na4 0-0=) 12...Qf5 (12...0-0 13.Bc6 bc6 14.Na4+=) 13.h3 0-0-0 (13...0-0 14.Na4+=) 14.Bc6= bc6 15.Qe2 Kd7 16.Qa6 Ra8 17.Na4 g5 18.c4 gf4 19.ef4 (19.c5 Rhg8 20.cd6 Qh3 21.Nc5 Kd6 22.Ne4 de4 23.Rf2–+) 19...Rhg8–/+ (19...Bf4 20.Nc5 Kd6 21.cd5 Nd5 22.Rae1+=) 20.Kh1? (20.cd5 cd5 21.Kh1 Nh5–/+) 20...e3 (20...Rg2 21.Nc5 Ke7–+) 21.b5–/+ Ng4?? (21...cb5 22.Qb5 Ke7–/+) 22.Qc6+– (22.hg4?! Rg4 23.Qc6 Ke7 24.Qd5 Qd5 25.cd5 Bf4+–) 22...Ke6 (22...Ke7 23.hg4 Rg4 24.Qd5 Qd5 25.cd5 Bf4+–) 23.Qd5 (23.hg4 Rg4 24.Qa8 Qh5 25.Kg1 Rg2 26.Kg2 Qg4 27.Kh1 Qh4 28.Kg1 Qg3 29.Kh1 Qh4 30.Kg1 Qg3 31.Kh1 Qh4=) 23...Kf6? (23...Qd5 24.cd5 Kd5 25.hg4 Kc4+–) 24.Qf5 Kf5 25.hg4 Kg4 (25...Rg4 26.Rae1 Ke4 27.Bc1 Kd4 28.c5+– (28.Be3 Kc4 29.Rb1 Kd5+–; 28.Re3?! Kc4 29.Rh3 Rag8+–)) 26.Nc3 Bf4 (26...Rg6 27.Nd5 Re8 28.Rf3+–) 27.Nd5 Bh6 (27...Bg5 28.Rf7 (28.Nc7 Rac8 29.Rf7 e2+–) 28...Raf8 29.Rc7+–) 28.Nf6 Kg3 (28...Kg5 29.Ng8 Rg8 30.Rf7+–) 29.Rf3 (29.Bc3 Kh4 30.Rf5 Rg2 31.Kg2 Rg8 32.Ng8 Bg5 33.Nf6 Bf6 34.Kf3 Be5 35.Rh1 Bh2 36.Rh2) 29...Kh4+– 30.Rh3 (30.Raf1 c5 31.Rh3 Kg5 32.Rg3 Kh4 33.Rf5 Kg3 34.Bc3 Kh4 35.Be1 Rg3 36.Rh5) 30...Kg5 31.Ng8 Re8 32.Nh6 e2 33.Nf7 Kf6 34.Ne5 Ke6 35.Re1 1–0. Trkn – SKINDOG9009, itsyourturn.com, 2001.

5.e3 a5 6.ba5 Nf6=.

5.e3 c6 6.Nc3 (6.c4 Nf6=) 6...b5 7.Qd2 g6 (7...a5 8.ba5 Qd8+=) 8.0-0-0 (8.a4!? ba4 9.Ba3=) 8...Bg4 (8...a5 9.Na2–/+) 9.Be2 (9.f3!? ef3 10.gf3+=) 9...Nf6 10.Bg4 Ng4 11.h3 Nf6 12.Nge2 Bh6 (12...a5 13.Na2–/+) 13.Rde1 0-0 14.g4 a5 15.ba5 Ra5?? (better is 15...Qc7–/+) 16.Nd5!+/– Qd8?? (16...cd5 17.Qa5 Discovered attack; 16...Nd5 17.Qa5 Discovered attack) 17.Nf6+– Qf6 18.Qa5 Qf2 19.Nc3 (better is 19.Kb1!? Bg7+–) 19...Be3 20.Kb1 Bd4 (20...Bd2 21.Rd1 e3+–) 21.Ne4 Be3 (21...Qf4 22.Bd4 Nd7+–) 22.Nf2 Bf2 23.Rd1 (23.Qc3 f6 24.Qb3 Kg7 25.Re7 Kh6 26.Bc1 g5 27.Qd3 Rh8 28.h4 Be3 29.hg5 Kg5 30.Qf5) 23...Re8 24.Rd8 Kf8 (24...f6 25.Re8 Kg7 26.Qc7 Nd7 27.g5 Bc5 28.Qd7 Be7 29.Qe7) 25.Re8 (25.Bf6 Bb6 26.Qb6 Nd7 27.Re8 Ke8 28.Qd8) 25...Ke8 26.Qc7 1–0. minn (2000) – pauldopson, net–chess.com, 2003.

5.e3 Be6 6.Ne2 Nf6 7.Nf4 Nbd7 8.Nd2 b6 (8...a5 9.c4=) 9.Bb5 g5 10.Ne6 fe6 (10...Qe6 11.c4+=) 11.c4+/– a6 12.Bc6 Rb8 (12...0-0-0 13.Rc1+/–) 13.c5 (13.Qa4 a5 14.ba5 ba5+–) 13...Kd8 (13...Bg7 14.Nb3+/–) 14.0-0 h5 (14...Bg7 15.Nb3+/–) 15.cb6 (15.Qa4!?+/–) 15...Rb6+= 16.Bd7 Qd7 17.Qc2 (17.f3 ef3 18.Nf3 Qg7+=) 17...Bd6 18.Rac1 (18.Nb3 h4 19.Nc5 Bh2 20.Kh1 Qd6+=) 18...Ke7 (18...Ng4!? 19.h3 Nh2=) 19.f3+= ef3 20.Nf3 g4? (20...Ne4 21.Ng5 Ng5 22.Qg6 Bh2 23.Kh1+–) 21.Ng5?? (better is 21.Nh4 Rh6 22.Ng6 Kd8 23.Rf6+–) 21...h4?? (better is 21...Rg8 22.Qf2 Rg6+=) 22.Qg6+– Rf8 23.Qg7 (better is 23.Rf6 Rf6 24.Qg7 Kd8 25.Qf6 Kc8 26.Qh8 Qd8 27.Qh6+–) 23...Kd8 (better is 23...Ke8 24.Qh6 Qe7+=) 24.Rf6?? (24.Qh6 Be7 25.e4+=) 24...Rf6?? (24...Bh2 25.Kh2 Qg7 26.Ne6 Re6 27.Re6 g3 28.Kh3 Rg8 29.Rd6 cd6 30.Rc8 Kc8 31.Kh4 Rh8) 25.Qf6+– Kc8 26.Ne6 (26.Qh8 Qd8 27.Qh5 Be7+–) 26...Kb7 (26...Bh2 27.Kh2 Re6 28.Qh4 Re3 29.Rf1+–) 27.Qf5 (better is 27.Nf4!? Qe8 28.Kh1 Qe3 29.Nd5 Qb3 30.Nb6 Qb2+–) 27...Bh2 (27...Qe6 28.Qe6 Bh2 29.Kh2 Re6 30.Rc3+–) 28.Kh2 Re6 (28...Qe6 29.Qh7 g3 30.Kh1+–) 29.Qg4 1–0. mwojo (1745) – supertimchan (2075), net–chess.com, 2004.

5.e3 f5 6.c4 c6 (6...Nf6 7.Nh3=) 7.c5 (7.cd5 cd5 8.Nc3 Nf6+=) 7...Nf6 (7...Qh4 8.Nc3=) 8.h4 (8.Nd2 Ng4=) 8...h5 (8...b6!?=) 9.Nh3+= Qc7 (9...Qd8 10.Nf4+=) 10.Nf4 Qf7 11.g3 Nbd7 (11...Be7 12.Be2=) 12.Nd2+= Ng4 13.Be2 (13.b5 Be7+=) 13...Ndf6 14.Qb3 (14.Rb1 Bd7+=) 14...a6 (14...Be7 15.b5=) 15.a4 (15.Qa4 Rb8+=) 15...g6 (15...Be7 16.0-0=) 16.Kf1 (16.b5 Rg8+=) 16...Bh6= 17.b5 ab5 18.ab5 Ra1 19.Ba1 0-0 20.b6 g5 (20...Qh7!?+=) 21.hg5+/– Bg5 22.Nh3 Bh6 23.Ke1 Qg7 24.Nf1 Nd7 (24...Kf7 25.Nf4+/–) 25.Bc3 (25.Bb2 Ndf6+/–) 25...Ndf6 26.Rg1 (26.Nf4 Bf4 27.ef4 Be6+/–) 26...Kh7 (26...Kf7 27.Nf4+=) 27.Bd2 (27.Nf4 Kg8+/–) 27...Be6 28.Nf4 Bf4 29.gf4 h4 (29...Ra8+/–) 30.f3 (30.Rh1!? Qh6 31.Qc2+/–) 30...ef3+= 31.Bf3 h3 32.Rh1 (better is 32.Qc2 Qh6 33.Ke2+=) 32...h2? (better is 32...Qh6 33.Ke2 Ne4+=) 33.Nh2+– Kg6 (33...Kg6 34.Qa4 Kf7+/–; 33...Kg8 34.Rg1+/–). dannyboy238 – shoulders, ChessWorld.net, 2007.

5.e3 Nf6 6.Bb5 c6 7.Ba4 (7.Be2 Qe6+=) 7...b5 8.Bb3 Bg4 (better is 8...Qc7–/+) 9.f3? (better is 9.Qd2+=) 9...ef3–+ 10.gf3 Qe3 11.Qe2 Qe6?? (better is 11...Qe2 12.Ke2 Bf5–+) 12.fg4+/– Ng4 (12...Qe2 13.Ne2 Ng4 14.h3+/–) 13.Qe6 fe6 14.Nf3 Bd6 15.Ng5 (15.Nbd2 0-0+/–) 15...Nh2 16.Ne6 Na6 (16...Ke7 17.Nc5+/–) 17.Nd2 (17.Ng7 Kd7+–) 17...Ke7 (17...Kf7 18.Ng5 Ke7 19.Ngf3 Nf3 20.Nf3+/–) 18.Nc5 (18.Ng7 Kf6 19.Nf1 Nf1 20.Nh5 Kg6 21.Kf1 Rhf8 22.Kg2 Rae8+–) 18...Bg3 (18...Nc7 19.a4+/–) 19.Kd1 (better is 19.Ke2 Nc5 20.dc5+– (20.bc5?! Rae8+=)) 19...Rhf8?? (better is 19...Nc5 20.dc5 Ng4 21.Bg7 Nf2 22.Ke2 Nh1 23.Bh8 Rh8 24.Rh1 h5+–) 20.c3 (better is 20.Na6 Rf2 21.a4+–) 20...Nc5+= 21.dc5 Rf2 (21...h5 22.Bc2+=) 22.Re1 (22.a4!? Bf4 23.Bc1 ba4 24.Ba4 Bd2 25.Ra2+–) 22...Kd7+= (22...Kd7 23.Rg1 Be5+=). challl – pauldopson, net–chess.com, 2004.

5.e3 Nf6 6.c4 Be6 7.cd5 Bd5 8.Nc3 Bc6 (8...a5 9.Nd5 Nd5 10.Qb3=) 9.Nge2 Qd6 10.Qc2 Ng4? (better is 10...a6+=) 11.b5+– (worse is 11.Ne4 Qh6+/–) 11...Bd5 12.Nf4 (12.Ne4?! Qe6 13.Nc5 Bc5 14.dc5 Be4+–) 12...Qf6 (12...Be6+–) 13.Ncd5 Nd7 (13...Qh4 14.Nc7 Kd7 15.Na8+–) 14.Qe4 (14.Qe4 Be7 15.Nf6 Ngf6 16.Qb7+–) 1–0. Pierred (2270) – Snakemaster2, Rated game, 5m + 0s, 2005.

5.e3 Nf6 6.Ne2 g6 7.Ng3 Bg7 8.Bb5 c6 9.Be2 Be6 10.Nd2 Nbd7 11.c4 h5 12.c5 h4 13.Ngf1 h3 14.g3 Nf8 15.Nb3 N8h7 16.a4 White prepares the advance b5 16...Ng5 17.b5 Bh6 18.bc6 bc6 19.Na5 Bd7 20.Qb3 0-0 21.Qb7 (21.Nd2 Rab8 22.Qc3 Qe8=) 21...Rfb8 (better is 21...Qe6!? 22.Qb4 Rab8+=) 22.Nc6= Qe8? (better is 22...Rb7 23.Ne7 Kh7+=) 23.Qb8?? (23.Nb8 Rb8 24.Qa6 Rb2 25.Qf6–/+ (25.Qa7?? Nf3 26.Bf3 ef3–+)) 23...Rb8–+ 24.Nb8 Qb8 25.Bc3 (25.Bc1 Ba4! 26.Ra4 Qb1–+) 25...Nf3 26.Bf3 ef3 (better is 26...Qb3 27.Rc1 Qa3–+ (27...ef3?! 28.Nd2 Qa4 29.0-0–+)) 27.a5?? (better is 27.Nd2–+) 27...Qb5 28.Nd2 (28.0-0-0 Qb3 29.Nd2 Qc3 30.Kb1–+) 28...Qe2 0–1. Stiller (2265) – nbh999 (2130), ChessWorld.net, 2003.

5.e3 Nf6 6.h3 Nc6 (6...a5 7.b5=+) 7.c3 (7.c4 Be6=) 7...Bf5 8.Nd2 Qd7 9.Nb3 Be7 10.b5 Nd8 11.Nc5 Bc5 (11...Qd6 12.c4=+) 12.dc5= c6 13.b6 (13.g4 Be6=) 13...a6 (13...Qe7 14.g4 Be6 15.Qd4–/+) 14.Qa4 (14.g4 Be6=) 14...0-0 (14...Ne6 15.Qa5=+) 15.0-0-0 (15.c4!? Qe7 16.Rc1=) 15...Ne6–/+ 16.g4 Bg6 17.Qa5 h6 (17...Qe7 18.c4–/+) 18.Be2 (18.c4 Qe7=+) 18...Qe7–/+ 19.h4 (19.c4 Nd7–/+) 19...Bh7 (better 19...Nd7–/+) 20.f3?? (better 20.c4=+) 20...Nc5–+ 21.Bc4 (21.Kb1 ef3 22.Ka2 fe2 23.Ne2 Ng4–+) 21...dc4 22.g5 (22.Kb1 ef3 23.Ka2–+) 22…Nb3 (22...Nb3 23.Kb1 ef3 24.Ka2 Na5 25.gf6 Qe3–+) 0–1. Delboy Smith (1835) – davy70 (1895), ChessWorld.net, 2009.

5.e3 g6 6.c4+= c6 7.Nc3 Nf6 8.Qb3 Be6 9.Nh3 (9.cd5 cd5 10.Nge2 Bh6=) 9...Nbd7 (9...Bh3!? 10.gh3 dc4 11.Bc4 Nbd7=) 10.Nf4= Nb6 (10...dc4 11.Bc4 Bc4 12.Qc4=) 11.c5+= Nc8 12.b5 Bh6 13.Ne6 fe6 14.a4 0-0 15.Be2 Rb8 (better 15...Qc7!?+=) 16.bc6+/- Nh5 (16...Bg7 17.Rc1+/-) 17.Bh5 gh5 18.Ba3 Qf7 (18...Qg7 19.0-0 h4 20.Rab1+-) 19.0-0 Ne7 (better 19...Qc7 20.cb7 Rb7+-) 20.cb7 Nf5 (20...h4 21.h3 Nc6+-) 21.c6 Nh4 (21...Qc7 22.Bf8 Bf8 23.Nd5 Qc6 24.Nf4 Rb7 25.Qe6 Qe6 26.Ne6+-) 22.Bf8 (better 22.Bd6 Ng2 23.Kh1+- (23.Bf8 Nh4 24.f4 Qg6 25.Kf2 Qg2 26.Ke1 Nf3 27.Rf3 ef3+-; worse 23.Bb8 Rb8 24.c7 Qc7 25.Kg2 Rb7+-)) 22...Qg6 (22...Bf8 23.f4 Qc7+-) 23.g3 Nf3 24.Kg2 h4 (24...Nh4 25.Kh1 Bf8 26.Nd5 Qf7+-) 25.Bh6 (25.c7 Rf8 26.b8Q Nd2+-) 25...h3 26.Kh1 Qf5 27.Bf4 (27.c7 Re8 28.b8Q Rb8 29.cb8Q Kf7 30.Q3b7 Kg6 31.Qg8 Kh5 32.Bf4 Qg6 33.Qbh7 Qh7 34.g4 Kh4 35.Bg3) 27...Qg4 28.Bb8 (better 28.c7 Rf8 29.b8Q Qf5+-) 28...Nh4 29.f3 ef3 30.Rf2 (30.Be5 Kf7 31.b8Q Nf5 32.Q3b7 Ne7 33.Qh8 Qg5 34.Qh7 Kf8 35.Rf3 Ke8 36.Qd7) 30...Nf5 31.Bf4 Ng3 32.Bg3 Qg3 (32...Kf8 33.b8Q Kg7 34.Q3b7 Kh6 35.Qf8 Kh5 36.Qh7 Kg5 37.Qfg7) 33.hg3 (33.hg3 h5 34.b8Q Kg7 35.Q3b7 Kh6 36.Qf8 Kg6 37.Qbg7; 33.b8Q Kg7 34.Qg3 Kf6 35.Qf3 Kg5 36.Rg1 Kh6 37.Qh3) 1-0. upep (1990) - aqaqaq (1905), Rated Blitz game, lichess.org, 2013.

5.b5 b6 6.c4 dc4 7.Bc4 Bb7 +=.

5.b5 b6 6.d4 Nd7 (better is 6...e4=) 7.de5+– Bb7 8.Nf3 f6 9.Nc3 Qf7 10.ef6 gf6 (10...Ngf6!? 11.Ng5 Qe7+/–) 11.Nd4 Ne7 12.Qd2 Ne5 13.0-0-0 Nc4 14.Bc4 dc4 15.e4 Rd8 16.Qe3 Rg8 17.g3 Nc8 18.Nd5 Bc5 19.Rhe1 Bd5 20.ed5 Ne7 21.Qc3 Rd5 22.Qc4 Rd4 23.Rd4 Bd4 24.Qd4 Rg6 25.Qf4 Kd8 26.Rd1 Ke8 27.Qc7 Qe6 28.a4 Rg5 29.Bd4 (29...Kf7 30.Qb6+–) 1–0. marekt – ralph14, ChessWorld.net, 2004.

5.b5 b6 6.h3 g6 (6...Nf6!?=) 7.Nf3 (7.d4 e4+=) 7...Bg7 8.d4 (8.c4 Bb7+=) 8...e4 9.Nfd2 f5 (9...Nf6 10.c4+=) 10.Nc3 (10.c4!?+=) 10...Be6 (10...Nf6 11.Be2=) 11.Na4 Nh6 (11...Nf6 12.Be2=) 12.c4+= dc4 (12...0-0 13.Nc3 dc4 14.Nc4+=) 13.Bc4 Bc4 14.Nc4 0-0 15.0-0 Nd7 16.Qb3 Kh8 17.d5 (17.Rfd1 f4+=) 17...Bb2 (17...Nf6 18.d6 cd6 19.Nab6+=) 18.Qb2 Qf6 (18...Kg8 19.Rfc1+=) 19.Qc2 (19.Qf6 Rf6 20.Rac1 Nf7+/–) 19...Rae8 (19...Nf7 20.Rac1+=) 20.Rfd1 (20.Rac1 Nf7+=) 20...f4 (20...Nf7 21.Nd2+=) 21.d6+/– f3? (21...fe3 22.fe3 cd6 23.Nd6 Re7+/–) 22.g3?? (better is 22.dc7 Nf7 23.Rac1+–) 22...Qf5 (22...Qe6 23.Qc3 Kg8+=) 23.Qc3 (better is 23.Qb2 Rf6 24.Kh2+= (24.dc7?? Qh3 25.Qf6 Nf6 26.c8Q Qg2)) 23...Kg8–/+ 24.Kh2 (24.g4 Ng4 25.hg4 Qg4 26.Kf1 Qg2 27.Ke1 Qg1 28.Kd2 Qf2 29.Kc1+=) 24...Ng4?? (better is 24...Qh5 25.Rh1 Qb5–/+) 25.hg4+– Qg4 26.Rh1 (26.Rd5 Rf5 27.Rf5 Qf5 28.Na5 Qh5 29.Kg1 ba5 30.Qc4 Kg7 31.dc7 Rc8 32.Qe4 Rc7+–) 26...Rf5 (26...Qh5 27.Kg1 Qb5 28.Qc2+–) 27.Kg1+– Rh5 28.Rh5 (28.dc7?? Rh1 29.Kh1 Qh3 30.Kg1 Qg2) 28...Qh5 29.Nd2 (29.Na5 ba5 30.dc7 Qh3 31.Qc4 Kh8+–) 29...Qh3 (29...cd6 30.Rd1+/–) 30.Qc4 Kg7? (better is 30...Re6!? 31.Qf1 Qf1 32.Kf1 cd6+–) 31.Qf1+– Qf1 32.Kf1 (32.Nf1 cd6 33.Rd1 Re6+/–; 32.Rf1?! cd6 33.Rc1 Nc5 34.Nb6 Rb8+–) 32...cd6 33.Nc3 (better is 33.Rc1!? Kf8 34.Rc6+–) 33...Nf6+/– 34.Rd1 d5 (34...h6 35.Na4 Re5 36.Rb1+– (36.Nb6?! Rb5 37.Rb1 Rc5+/–)) 35.Nb3 Re5 36.Ke1 (36.Rc1 Ng4 37.Kg1 Rh5+/–) 36...Kf7 (36...Rh5 37.Na4 Rh1 38.Kd2+/–) 37.Nd4 (37.Rc1 Rh5+/–) 37...h5 (37...Rh5 38.Kd2+/–) 38.Nc6 Rg5 39.Kd2 (39.Na7 Re5+/–) 39...h4 (39...Ng4!? 40.Rf1 Ke6+/–) 40.gh4+– Rg2 41.Ke1?? (41.Rf1 Ke6+–) 41...Rh2?? (41...Rg1 42.Kd2 Rg2 43.Rf1+–) 42.Nd5?? (better is 42.Ne5 Kg7 43.Rd4 Rh4 44.Nd5 Rh1 45.Kd2+–) 42...Rh1+= 43.Kd2 Rd1 44.Kd1 Nd5 45.Kd2 Ke6 (45...Kf6 46.a4=) 46.a4 (46.Nd4 Kd6+=) 46...Kf5 47.Nd4 (better is 47.Ke1!?+=) 47...Kg4–/+ 48.Ne6 Kh4 0–1. gtate (1980) – somporn (2140), net–chess.com, 2005.

5.b5 Nd7 6.Nc3 Ngf6=.

5.b5 Nd7 6.d4 e4 7.a4 f5 8.Nh3 Ngf6 9.Be2 g6 (9...Qf7!?=) 10.0-0+= Bg7 (10...Kf7 11.c4+=) 11.Ba3 (11.Nd2 Bh6+–) 11...c5?? (better 11...Qd8+–) 12.bc6!+– (12.bc6 Qe6 13.cd7 Bd7 14.Nf4+–) 1–0. guestkafl – guestzmrv, internet free game, 2018.

5.b5 Nd7 6.d4 e4 7.a4 Qh4–/+ 8.Nd2 Ndf6 (8...Ngf6!?=+) 9.g3= Qg5 (9...Qh6 10.Ne2=) 10.c4 (10.Ne2 Nh6=) 10...Bb4 11.h4 ½–½. Klaus Behrmann (1990) – Alissa (2435), ChessWorld.net, 2003.

5.b5 Nd7 6.d4 e4 7.Nd2!?=.

5.b5 Nd7 6.d4 Ngf6 7.de5 Ne5 8.Qd4=.

5.b5 Nf6 6.a4 Bf5 7.d3 Qe6 8.Nd2 Bd6 9.Ngf3 e4 (better is 9...0-0!?+=) 10.Nd4+= Qe5 11.Rb1 Nbd7 12.N2b3 (12.de4 Be4 13.b6+= (worse is 13.Ne4 Ne4 14.Nf3 Bb4 15.Ke2 Nc3 16.Bc3 Qc3+=)) 12...Nb6 13.Nf5 Qf5 14.Nd4 Qg6 15.Ra1 0-0 16.g3 Nfd7 17.Bh3 f5 18.Nb3 Bb4 19.Kf1 Bd6 20.Bc3 Be5 1–0. waycoolguy (1905) – Alissa, ChessWorld.net, 2003.

5.Nf3 e4 6.Nd4 Nf6 =.

5.Be2 Nf6 6.d3 (6.Nf3 Nbd7=) 6...Nc6 (6...Bf5 7.Nf3 Nc6 8.0-0=) 7.Nf3 d4 (better is 7...Bf5!?=) 8.ed4+/– ed4 9.0-0 (9.Nd4 Nd4 10.Bd4 Bg4+/–) 9...Bg4 (9...Qd6!?+=) 10.Re1 Qd6 (10...Be6 11.Nd4 Nd4 12.Bd4 0-0-0+/–) 11.Nbd2 (11.Nd4 Nd4 12.Bg4 Be7+–) 11...Be7 (11...Be6 12.Ne4 Qd8 13.Neg5+=) 12.Nc4 (12.Nb3+/–) 12...Qd7 (12...Qd8 13.Nd4 Nd4 14.Bg4+–) 13.Qd2 (better is 13.Nfe5 Be2 14.Qe2 (14.Nd7?! Bd1 15.Nf6 gf6 16.Rad1 Rd8+/–) 14...Ne5 15.Ne5+–) 13...0-0?? (better is 13...Be6+/–) 14.Nfe5+– Ne5 15.Ne5 Qc8 (15...Qf5 16.Ng4 Rfe8 17.Nf6 Bf6 18.Bf3+–) 16.Ng4 Re8 (16...Qd8 17.Qf4 c5 18.bc5 Ng4 19.Qg4 Bc5 20.Bf3+–) 17.h3 (better is 17.Qf4 c5 18.bc5 Ng4 19.Bg4 Qc5 20.Qd4 Qd4 21.Bd4 Ba3+–) 17...Bd6 (17...c5+–) 18.Nf6 gf6 19.Bd4 Be7 (19...Qf5 20.Bf3 c6 21.Qh6+–) 20.Qf4 Qd8 (20...Qd7 21.Bf3 Rad8 22.c3+–) 21.Bb2 (21.Bh5 c5 22.bc5 h6+–) 21...Bd6 (21...Qd6 22.Qg4 Kh8 23.Qc4+–) 22.Qf5 Be5 (22...Re6 23.Bf3 c6 24.Be4+–) 23.d4! Bd6 (23...Bd4 24.Qg4 Double attack (24.Qg4 Decoy)) 24.Bd3 Kf8 25.Qh7 Re6 26.Qh8 (better is 26.Re6 fe6 27.Bg6 Bh2 28.Kh2 Qe8+–) 26...Ke7 27.Re6 Ke6 28.Re1 (better is 28.Qh4 Bb4 29.d5 Kd5 30.Be4 Kc5 31.Bb7 Bd2+–) 28...Kd7 29.Bf5 Kc6 30.d5! Kb6 (30...Kd5 31.Rd1 Double attack (31.Bf6 Discovered attack)) 31.Bd4 Kb5 32.Bd3 (32.Qh4 Bh2 33.Kh2 Qd6 34.Kg1 Ka4+–) 32...Ka4 33.Qh5 Qd7 (33...Qb8 34.Qd1 Ka3 35.Qa1 Kb4 36.Rb1) 34.c4 Ka3 (34...Bf4 35.Qd1 Ka3 36.Qa1 Kb4 37.Rb1) 35.Qe2 (35.Ra1 Kb4 36.Qd1 Bh2 37.Kh1 Qh3 38.Qa4) 35...Kb4 (35...Bh2 36.Kh1 Kb4 37.Qb2 Ka5 38.Ra1 Qa4 39.Qc3) 36.Qd2 Ka4 37.Bc2 1–0. alexp – nando, net–chess.com, 2017.

5.Nf3 Nc6 6.Be2 (6.b5 ab5 7.Bb5 f6=) 6...Nf6 (6...e4 7.Nd4=) 7.0-0 Qd6 8.b5 ab5 9.Bb5 Be7 (9...e4 10.Be5 Qe6 11.Bc6 bc6 12.Bf6 ef3+= (12...gf6?! 13.Nd4 Qd7 14.d3=)) 10.Be5+/– Qd7 11.d4 0-0 12.Nbd2 Qd8 13.c4 (13.Bc6 bc6 14.c4 Ra3 15.Ra3 Ba3+/–) 13...dc4 (13...Ne5 14.de5 Ng4 15.h3+=) 14.Nc4 (better is 14.Bc6!? bc6 15.Nc4+–) 14...Ne5 15.de5 (15.Nce5 Ra3 16.Ra3 Ba3+/–) 15...Ne4 (15...Nd7 16.Nd4 c6 17.Ba4=) 16.Qc1 (better is 16.Qc2 Bf5 17.Nd4+/–) 16...b6?? (better is 16...c6 17.Rd1 Qc7=) 17.Bc6 (better is 17.Rd1 Nd6 18.ed6 cd6+–) 17...Bf5 18.Ba8 (18.Rd1 Qc8 19.Ba8 Qa8+–) 18...Qa8 19.Nd4 f6?? (19...Bd7+–) 20.Nf5 Bc5 21.Rd1 (better is 21.f3 Ng5+–) 21...fe5 22.Ng3 Nf2 23.Rf1 Ng4 24.Rf8 (24.h3!? Nf6+–) 24...Qf8 25.Qd2 Qf7 (25...Qf4 26.Qd8 Qf8 27.Qc7 Be3 28.Ne3 Qf2 29.Kh1 Ne3 30.Qb8 Kf7 31.Qb7 Kf8 32.Rc1 Qg2 33.Qg2 Ng2 34.Kg2+–) 26.Qd8 Bf8 (26...Qf8 27.Qc7 Be3 28.Ne3 Qf2 29.Kh1 Ne3 30.Qb8 Kf7 31.Qb7 Ke8 32.Rc1 Qg2 33.Qg2 Ng2 34.Kg2+–) 27.Rf1 Qe7 (27...Nf6 28.Ne5 Qe7 29.Qd4+–) 28.Qd5 Kh8 29.h3 (29.Ne5!? Ne5 30.Qe5 h6+– (30...Qe5?? 31.Rf8)) 29...Nf6 30.Ne5 (better is 30.Qe5 Qe5 31.Ne5+–) 30...Nd5–+ 31.Nd7 (31.e4 Nf6 32.Rf5 Qa3–+) 31...Qd7 (better is 31...Qe3 32.Kh1 Ba3–+) 32.Rf8 1–0. wlittle (2300) – austen (1840), net–chess.com, 2003.

5.Nf3 Nd7 6.Be2=.

5.c4 d4 6.Be2 Bf5 (6...c5!?=) 7.ed4+= ed4 8.Bd4 f6 (8...Be4!? 9.f3 Bf5+–) 9.Nf3 Qd8 (9...a5 10.ba5 Bd3 11.Be3 Be2 12.Qe2+–) 10.0-0+– Nh6 (10...Bd6 11.c5 Bc7 12.Re1+–) 11.c5 (11.Nc3 Be6+–) 11...Be6 12.Qc2 Be7 13.Re1 0-0 (13...a5 14.b5+–) 14.Bd3 Bg4 15.Bh7 Kh8 16.Qe4 Bf3 17.gf3 (17.Qe7 Qd4 (worse 17...Kh7 18.gf3 Qc8 19.Qe4 Nf5 20.Nc3+–) 18.Qf8 Kh7 19.gf3 Qa1+–; worse 17.Qf3 Qd4 (17...Kh7?! 18.Be3 f5 19.Nc3=+) 18.Nc3 Bc5–/+ (worse 18...Kh7 19.Re7 Rf7 20.Rf7 Nf7 21.Qf5 Kh6 22.Rd1=+)) 17...f5?! (17...Na6 18.Bb2 Nc7+–) 18.Qe7 Kh7 (18...Qd4 19.Qf8 Kh7+–) 19.Qg7 1–0. DEFFM – GuestZFDQ, freechess.org, 2018.

5.c4 e4 6.Qb3 (6.cd5 cd5 7.d3 Nc6=) 6...Nf6 (6...dc4 7.Qc4 Bf5 8.Ne2=) 7.Nc3 (better is 7.cd5 cd5 8.d3=) 7...Na6 (better is 7...dc4 8.Bc4 b5+=) 8.cd5+/– c5? (8...cd5 9.Nd5 Nd5 10.Bb5 Bd7 11.Qd5 Bb5 12.Qb5 Qd7 13.Qe5 Qe7 14.Qf5+–) 9.b5 (9.Ba6!? ba6 10.bc5 Qc5 11.Ne4 Ne4 12.Qa4 Kd8 13.Qe4 Bb7 14.Qh4 Be7+–) 9...Nc7+/– 10.Bc4 (10.d3 Bf5+/–) 10...g6 (better is 10...Bf5!?+/–) 11.Nge2 Qd6? (better is 11...Bf5+–) 12.Ng3 (12.Ne4 Ne4 13.Bh8 Be7+–) 12...Bf5 (12...Bg7 13.Nce4 Ne4 14.Ne4+– (worse is 14.Bg7 Ng3 15.hg3 Rg8 16.Rh7 Bf5+–)) 13.Nce4! Bg7 (13...Be4 14.Ne4 Combination; 13...Ne4 14.Bh8 Pinning (14.Bh8 Deflection; 14.Bh8 Clearance)) 14.Nd6 Ke7 15.Ngf5 (better is 15.Ndf5 gf5 16.d6 Kf8 17.dc7 Ng4 18.Bg7 Kg7 19.Nf5 Kf6 20.Bf7 Rhe8 21.Be8 Re8+–) 15...gf5 16.Nf5 Kf8 17.d6 Ne6 18.Be6 Ke8 19.Ng7 Kf8 20.Bf6 Rg8 (20...h5 21.Bf7 Rh7 22.Qe6 Rg7 23.Be7) 21.Bf7 Rg7 (21...Rd8 22.Qe6 Rg7 23.Be7) 22.Bg7 (22.Be7) 22...Kg7+– 23.Bh5 1–0. jaddwarrior (1770) – deerwood, ChessWorld.net, 2015.

5.c4 h6 6.Nf3+– e4 (6...d4 7.ed4 ed4 8.Qe2+–) 7.Nd4 Nf6 8.Nc3 g6 (8...a5!?+–) 9.cd5+– cd5 (9...Bg7 10.Bc4 0-0 11.0-0+–) 10.Rc1 Bg7?? (better 10...Bg4 11.Qa4 Bd7+–) 11.Nd5! Nd5 12.Rc8 Kd7 13.Rc5 Nc6 (13...Nc7 14.Qg4 f5 15.Qg6 Bd4 16.Bd4 Rf8+–) 14.Rd5 Kc7 15.Nb5 Kb8 16.Bg7 Rd8 17.Rd8 Qd8 18.Qg4 g5 19.Qg3 Kc8 20.Bc4 a6 21.Bf7 ab5 22.Be6 Qd7 23.Bd7 Kd7 24.h4 Rg8 25.Bh6 g4 26.Qf4 Kc8 27.Qe4 Kb8 28.Bf4 Ka7 29.h5 Rc8 30.h6 Kb6 31.h7 Ka6 (31...Rh8 32.Be5 g3 33.Bh8 Ka6 34.fg3 Kb6 35.Bd4 Nd4 36.Qd4 Kc6 37.Rh6 Kc7 38.h8Q b6 39.Qdg7) 32.h8Q Rh8 (32...Ka7 33.Qc8 g3 34.Bg3 Kb6 35.Rh7 Nb4 36.ab4 Ka6 37.Qcb7) 33.Rh8 Na7 (33...Kb6 34.Ra8 g3 35.Bg3 Nb4 36.Qb4 Kc6 37.Qd6) 34.Bc7 b6 (34...Nc8 35.Rc8 Ka7 36.Qe6 b6 37.Qb6) 35.Qe6 Nc6 (35...Nc8 36.Qc8 Ka7 37.Qa8) 36.Qc6 g3 37.Qb6 1–0. gho8811h – vdwp, private online chess game, 2018.

5.Be2 Nf6 6.Nf3 e4 7.Nd4 g6 (7...a5 8.ba5 Ra5 9.Bc3=) 8.Qc1 Bg7 9.b5 0-0 10.f4 ef3 (10...c5!? 11.Nb3 a5+=) 11.Nf3= Nbd7 12.0-0 Nc5 13.Bc3 Na4 14.bc6 bc6 15.Bb4 c5 16.Ba5 Ne4 17.d4 (17.Ra2!?+=) 17...Bh6–/+ 18.dc5? (18.Re1!?–/+) 18...Qc5 (better is 18...Ng3! 19.Kf2 Ne2 20.Ke2 Ba6 21.Kf2 Bf1 22.Qf1 Be3 23.Kg3–+) 19.Bb4 Be3 20.Kh1 Bc1 21.Bc5 Nac5 22.Rc1 Bb7 23.Nbd2 Nc3 24.Bf1 Rfe8 25.Nb3 N5e4 26.Nfd2 Nd2 27.Nd2 Bc6 (27...d4 28.Bc4–+) 28.Nf3–/+ Bb5 29.Bb5 Nb5 30.c4 dc4 31.Rc4 Re7 32.Rb4 Nd6 33.h3 Rae8 34.Rab1 Re2 35.R1b2 Nf5 36.Re2 Re2 37.Rb7 Re7 38.Rb4 Kg7 39.Kh2 Ne3 40.Ng5 f5 41.Nf3 h6 42.Nd4 Nd5 43.Rc4 Nf6 (43...Re4!?–/+) 44.Rc6 Kf7 45.Nb5 1–0. mikebaldini – dmaestro, gameknot.com, 2015.

5.b5 Na5 6.Nf3=.

5.Bb5 Bd7 6.Nf3 e4 7.Bc6 Bc6 8.Ne5=.

5.Bb5 Qf6 6.Ne2 (better is 6.Bc6 bc6 7.Qh5+=) 6...d4? (better is 6...Bd7!?=) 7.ed4+/– a6 (7...Kd8 8.de5 Ne5 9.d4+/–) 8.de5+– Qe6 (better is 8...Qg6 9.Bc6 Qc6+–) 9.0-0?? (9.Nf4 Qh6 10.Nd5 Kd8+–) 9...Qg6?? (9...ab5 10.f4–/+) 10.g3?? (better is 10.Bc4+–) 10...ab5–/+ 11.f4 (11.Nf4 Qf5–/+) 11...Bh3 12.Rf3 (12.Rf2 Bf5 13.d3 Nh6–+) 12...0-0-0 (better is 12...Bg4 13.Re3 Nge7–+) 13.Nd4?? (better is 13.Rf2–+) 13...Nd4 (worse is 13...Rd4 14.Bd4 Nd4 15.Rf2–+) 14.Rd3 (14.Bd4 Rd4 15.Rf2 Bf5–+) 14...Nf5 (better is 14...Qe4 15.Qg4 Bg4–+) 15.Rd8 Kd8 16.d4 (16.Qf3 Kc8 17.Qf2–+) 16...Ne3 (16...Ng3!? 17.Qf3 Ne2 18.Kf2 Qg1 19.Ke2–+) 17.Qe2 (17.Qd3 Nc2 18.Qg6 hg6–+) 17...Qe4 (better is 17...Nc2 18.Nc3 Na1 19.Ba1–+) 18.Bc1 (18.Nc3 Qc2 19.Qc2 Nc2 20.Rc1–+) 18...Bg4 (better is 18...Qc2 19.Qc2 Nc2–+) 19.Qf2?? (19.Qe3 Qc2 20.Nc3–+) 19...Nd1 20.Qd2 Qf3 (better is 20...Bh3 21.Nc3 Nc3–+) 21.Bb2 (21.Qg2–+) 21...Nb2 (21...Bh3 22.Qe2 Qe2 23.d5 Qg2) 22.Ra2 (22.Nc3 Nc4 23.Qd3 Ne3–+) 22...Nc4 (22...Bh3 23.Qe2 Qe2 24.Rb2 Qg2) 23.Qf2 (23.Qd3 Ne3 24.c3 Bf5–+) 23...Qf2 (better is 23...Qd1 24.Qf1 Qd4 25.Qf2 Qd1 26.Qf1 Qf1 27.Kf1–+) 24.Kf2 f5 (better is 24...Be6!? 25.Nc3–+) 25.a4 Bb4 (25...ba4 26.Ra4 Nb6 27.Ra7–+) 26.ab5 Ne7 (better is 26...Be7!? 27.Nc3–+) 27.Ra8 (27.Ra4 Bd1 28.Rb4 Bc2–+) 27...Nc8 28.Ra4 Ne3! 29.Ke3 b6 (better is 29...Nb6 30.Ra7 Kc8–+) 30.Rb4= h5 31.Nc3 (31.h4 Re8=) 31...Ne7 (31...h4 32.Nd5 hg3 33.hg3+=) 32.e6 (32.Ra4 h4=) 32...Bd1 (32...Rh6 33.d5=) 33.Kd2 (better is 33.d5!?=) 33...Bf3–/+ 34.Ra4 c6 (34...Kc8!?–/+) 35.Ra8 (35.bc6!? Bc6 36.Ra7+=) 35...Nc8+= 36.Rb8? (36.Ke3 Bd5 37.bc6 Bc6= (worse is 37...Be6 38.d5+=)) 36...h4 (better is 36...Kc7!? 37.Ra8 Re8–+) 37.Ke3 (better is 37.bc6 hg3 38.hg3 Bc6 39.d5–/+) 37...Bg4?? (better is 37...Bh1 38.bc6 Bc6–/+) 38.Na4?? (better is 38.bc6 Kc7 39.Rb7 Kc6 40.Rg7 hg3 41.d5 Kc5 42.hg3+–) 38...hg3 (38...Kc7 39.Rc8 Rc8 40.bc6–+) 39.hg3 (39.h3 Kc7 (39...cb5 40.Nb6 Kc7 41.Rc8 Rc8 42.Nc8–/+) 40.Rc8 Rc8 (40...Kc8?! 41.hg4 cb5 42.Nc3–/+) 41.hg4 g2–+) 39...Re8 (39...Kc7 40.Rc8 Rc8 41.bc6–+) 40.bc6? (better is 40.Nb6 Re6 41.Kd3+=) 40...Re6–+ 41.Kd3 (41.Kd2 Rc6 42.Nc3 Kc7–+) 41...Rc6 42.d5 Rd6 (better is 42...Rg6 43.Ra8 Bd1–+) 43.Kd4?! (43.Nc3–+) 43...Kc7 44.Ra8 b5 (better is 44...Kb7 45.Rc8 Kc8–+) 45.Nc3–/+ Kb6?? (better is 45...Kb7 46.Ra1 Rb6–/+) 46.Rc8+– b4 (46...Rh6 47.Ke5 Kb7 48.Rg8+–) 47.Na2 (47.Rb8 Kc7 48.Rb4 Ra6+–) 47...Kb7 48.Rc4 Rb6 (48...b3 49.cb3 Rd8 50.Nc3+–) 49.Nb4 (better is 49.Rb4!? Kc7+–) 49...Be2 50.Rc5?? (better is 50.Nd3 Bd3 51.Kd3+–) 50...Rb4= 51.Ke5 g6 (51...Bg4 52.c4 Rb3 53.d6 Rg3 54.Rc7 Kb6 55.c5 Kb5 56.d7+/–) 52.d6+= Bb5 53.Kf6 (better is 53.c3 Rb2 54.c4=) 53...Bd7?? (better is 53...Kb6 54.Rc8 Rd4=) 54.Rc7+– Kb6 55.Kg6 (better is 55.Rd7 Kc6 56.Rd8+–) 55...Bc6 56.Kf5 Rb5 (56...Rd4 57.Ke5 Rd5 58.Ke6+–) 57.Kg4 (better is 57.Ke6+–) 57...Rd5 58.Rh7 (58.Re7 Rd6 59.f5 Rd2+–) 58...Rd6 59.f5 Bd7 (59...Rd2 60.c3+–) 60.c4 (60.Kg5 Rd2+–) 60...Rd4 (60...Rg6!? 61.Kf4 Bf5 62.Kf5 Rg3+/–) 61.Kg5+– Kc6 62.f6 (62.Rh6 Kc5+–) 62...Rg4+/– 63.Kh5 (63.Kh6 Rg3 64.Re7 Rh3 65.Kg7 Bf5+/–) 63...Rg3 64.f7 (64.Re7!?+/–) 64...Rf3= 65.Kg6 (65.Kg5 Be6 66.Rh6 Rf5 67.Kg4 Kd7+=) 65...Bf5 (better is 65...Be6!?–/+) 66.Kg7= Bh7 67.f8Q Rf8 68.Kf8 Kc5 69.Kg7 Kc4 70.Kh7 Kd4 ½–½. Pekin Dragons – West Islander, ChessWorld.net, 2011.

5.c4 dc4 6.Bc4 a6 7.Qb3 (7.d3 Be6=) 7...Nf6 8.Nf3 e4 9.Ng5 Nd8 10.h4 (10.f3!?=) 10...h6=+ 11.Nh3 Be6 (11...b5!? 12.Be2 c5=+) 12.Nf4= Bc4 (12...Bf5 13.d3=) 13.Qc4+= Ne6 14.Ne6 Qe6 15.Qe6 fe6 16.0-0 (16.h5!?+=) 16...0-0-0 17.Bd4 (17.f3 ef3 18.Rf3 Be7=) 17...Bd6=+ 18.Ra2 e5 19.Bc3 Nd5 20.Bb2 g5 21.hg5 hg5 22.g3 (22.Nc3!? Nc3 23.dc3=+) 22...Rh7 23.Re1?? (better 23.Rc1-/+) 23...Rdh8-+ 24.Kf1 Nf6 (better 24...Rh1 25.Ke2 Re1 26.Ke1 Rh1 27.Ke2 Rb1-+) 25.Ke2 Rh2 26.Nc3 Rg2 27.Rf1 Rhh2 28.Raa1 Kd7 29.Nd1?? (better 29.Rad1-/+) 29...Nh5-+ 30.Ke1 (30.g4 Ng3 31.Ke1 Ke6-+) 30...Ng3 31.Rc1 Nf1 32.Kf1 Ke6 33.Rc4 Kf5 34.a4 (34.Bc3 g4 35.Bb2 g3-+) 34...b5 (better 34...g4!? 35.b5-+) 35.Rc6 Kg4 (better 35...g4 36.ab5 ab5-+) 36.Rd6 (36.Ke2-+) 36...cd6 37.ab5 (37.Ke2-+) 37…Kf3 (37...Kf3 38.ba6 Rh1) 0-1. zembelek (2135) - zoranz (1895), Rated Blitz game, lichess.org, 2013.

5.Be2 d4 6.ed4 (6.b5 Na5+/–) 6...ed4 (better is 6...Nd4!? 7.Nc3 Bf5=) 7.Nf3+/– Qf6 8.0-0 Bd6 9.Re1 (better is 9.b5 Ne5 10.Nd4+/–) 9...Nh6? (better is 9...Nge7+/–) 10.Bb5+– Be5?? (10...Kf8 11.Bc6 bc6 12.Bd4 Qg6+–) 11.Nd4 (better is 11.Bc6 bc6 12.Re5 Be6 13.Bd4+–) 11...0-0+= 12.Bc6 Bd4 (12...bc6 13.Re4 Bb7–/+) 13.Bd4+/– Qd4 14.c3 Qb6 15.Bf3 (15.Be4 a5+/–) 15...Qg6 (15...a5 16.d3 ab4 17.cb4+/–) 16.Be4 (16.d4 Bg4+/–) 16...Bf5 (16...Qd6 17.d4+–) 17.Bf5 (17.Bb7 Bc2 18.Qe2 Bd3+/–) 17...Qf5 (17...Nf5 18.d4+=) 18.d4+/– Rae8 (18...Ng4 19.f3 Nf6 20.Re5+/–) 19.Nd2 Qf4 (19...Re1 20.Qe1 Qc2 21.Nc4+/–) 20.Nf3 Ng4 (20...c6 21.Qb3+–) 21.h3 (better is 21.Qa4 Re1 22.Re1+–) 21...Nf2?? (better is 21...Re1 22.Qe1 Nf6+/–) 22.Kf2+– Re6 (22...Qf5 23.Qa4 Re6 24.Kg1+–) 23.Re6 fe6 24.Qe2 Qh4 (24...Rf6 25.Kg1+–) 25.Kg1 Qg3 (25...Qe7 26.Re1+–) 26.Qe6 Kh8 27.Re1 (27.Ne5 Qf2 28.Kh1 c6+–) 27...h6 28.Re3 Rf6 (28...c6 29.Qe5 Qe5 30.de5+–) 29.Qe8 Kh7 30.Qe4 Kg8 (30...Kh8 31.Qd5 Rf8 32.Qb7+–) 31.Qb7 (better is 31.Qd5 Kh7 32.Re8 Rf3 33.Qf3 Qf3 34.gf3 Kg6+–) 31...g5 (31...Kh7+–) 32.Qc8 Kg7 33.Re7 Kg6 (33...Rf7 34.Rf7 Kf7 35.Ne5 Qe5 36.de5 g4 37.e6 Kf6 38.Qd7 gh3 39.e7 h2 40.Kh2 c6 41.e8Q Kg5 42.Qe4 a6 43.Qdf5) 34.Ne5 Kh5 35.Qe8 (35.Qg4 Qg4 36.hg4 Kh4 37.Kh2 Rf2 38.Rh7 Rg2 39.Kg2 h5 40.Rh5) 35...Kh4 36.Ng4 Qd3 (36...Rf1 37.Kf1 Qd3 38.Kg1 Qe2 39.Re2 Kg3 40.Re3 Kh4 41.Nf6 c6 42.Qh5) 37.Nf6 Qd1 38.Re1 Qd2 (38...Qf3 39.Re4 Qf4 40.Qh5 Kg3 41.Rf4 Kf4 42.Qf3) 39.Qh5 Kg3 40.Qg4 1–0. Trkn – Toni, itsyourturn.com, 2001.

5.Be2 e4 6.Nc3 Nf6 7.Nb5 =+.

5.Nf3 e4 6.Nd4 =.

5.Nf3 Bg4 6.Be2 Nf6 7.b5 Nd8 (better is 7...Bf3!? 8.Bf3 Nd8=) 8.Ne5+/– c6?? (better is 8...Be2 9.Qe2 a6+/–) 9.Ng4+– Ng4 10.Bg4 cb5 11.0-0 Ne6 12.Be6 Qe6 13.d3 Bd6 (13...Qc6 14.Bd4+–) 14.Nd2 (14.Bg7 Rg8 15.a4 Rg7+/–) 14...0-0 15.Nf3 f5 16.Qd2 f4 17.Qc3 fe3 (17...Qf7+–) 18.Qg7 1–0. Fournier,Frederic (1795) – Brigadeiro (1665), Active (1/0), 2005.

5.Nf3 Bg4 6.h3 Bf3 7.Qf3 Nf6 8.Bb5 =.

5.Nf3 Bg4 6.h3 Bh5 7.Be2 (7.g4 e4 8.gh5 ef3 9.Qf3 Qe6+/–) 7...e4= 8.Nd4 Be2 9.Qe2 Nd4 (9...Qd7 10.d3=) 10.Bd4 Nf6 11.0-0 g6 (11...c6!?=) 12.c4 (12.Nc3 c6 13.f3=) 12...c6 (better is 12...dc4!? 13.Nc3 Bg7+/–) 13.cd5+– Bg7 14.dc6 bc6 15.Nc3 (15.Qa6 0-0+–) 15...0-0 (15...Qe6 16.f3+–) 16.Bc5 (16...Qe6 17.Bf8 Rf8 18.Qa6+–) 1–0. chem1st – S, ChessWorld.net, 2005.

5.c4 dc3 (better 5...Nf6!?=+) 6.Nc3+/- (6.Bc3?! Nf6=; worse 6.dc3 Nf6=) 6...Bf5 (6...Nf6!?+/-) 7.Nf3 e4 (7...Nf6!?+/-) 8.Nd4+- Bg6 9.Bc4 (9.h4 h5 10.Nd5 Qd7+-) 9...c6 (9...Nf6 10.0-0+-) 10.Qb3 (better 10.h4 h5 11.Nce2+-) 10...b5?? (better 10...Nf6+/-) 11.Be2 (better 11.Bb5!? Qb7 (11...cb5?? 12.Qd5+-) 12.Ba4 Nf6+-) 11...Nf6 12.0-0 a5 13.ba5 (better 13.f4!?+-) 13...Ra5+/- 14.h3 (14.f3 ef3 15.Bf3 Qd7+/-) 14...h5 (14...Qd7 15.Ncb5 cb5 16.Bc3+-) 15.Rac1 (better 15.Rfd1+-) 15...c5?? (better 15...Qd7+/-) 16.Bb5+- Nfd7 (16...Kd8 17.Na4 Qc7 18.Bc3+-) 17.Nde2 (better 17.Bd7 Nd7 18.Nc6 Qd6 19.Na5 f6+-) 17...Bf5 (17...Qd6 18.Nf4+-) 18.Nf4 (better 18.Nd5 Qd6 19.Nd4+-) 18...g5 (18...Qd6+-) 19.Nfd5 Qd8 20.Ne4! Be4 21.Nf6 Qf6 (21...Ke7 22.Ne4 Rb5 23.Qb5+-) 22.Bf6 Rh6 (22...Rb5 23.Qb5 Rg8 24.Bc3+-) 23.Bg5 (23.Qb4 Rf6 (23...cb4?? 24.Rc8) 24.Qa5 Rh6+-) 23...Rb6 24.a4 f6 (24...Bc6 25.Rc4 f6 26.Bh4+-) 25.Bf4 Nc6 (25...Bc6 26.Bc7 Bb5 27.Bb6+-) 26.Qc4 (better 26.Qe6 Kd8 27.Qe4 Rab5 28.ab5 f5 29.Qf5 Ne7 30.Qh5 Re6+-) 26...Nb4 27.Qe4 Be7 28.Rc5 Rab5 29.Rb5 (29.Rc8 Kf7 30.Qh7 Ke6 31.Qg8 Kf5 32.Rc4 Ne5 33.e4 Kf4 34.Qg3) 29...Rb5 30.ab5 Nb6 31.Qg6 Kd7 32.Qh5 (32.Ra1 Na2 33.Ra2 Nc8 34.Qf5 Ke8 35.Qc8 Kf7 36.Ra8 f5 37.Qf5 Kg7 38.Be5 Bf6 39.Qf6 Kh7 40.Qg7) 32...N4d5 33.d4 (better 33.Ra1 Ke6+-) 33...Ke6 34.Rc1 Nd7 35.Qg4 (35.Rc6 Bd6 36.Qe8 Ne7 37.e4 Ne5 38.d5) 35...f5 (35...Kf7 36.Rc8 Bf8 37.Qd7 Ne7 38.Qe8 Kg7 39.Qf8 Kg6 40.Qe7 Kf5 41.g4 Kg6 42.Rg8) 36.Qg6 (36.Qg8 Kf6 37.Bg5) 36...N5f6 (36...N7f6 37.Rc6 Kd7 38.Qf5 Ke8 39.Qe6 Nb6 40.Bd6 Nfd5 41.Rb6 Kf8 42.Rb8 Kg7 43.Rg8 Kh7 44.Qg6) 37.Rc6 (37.d5 Kd5 38.Qf5 Ne5 39.Qe5) 37...Kd5 (37...Bd6 38.Bd6 Nc5 39.Bc5 Kd5 40.Qf5 Kc4 41.Bd6 Kb3 42.Qc2) 38.Qf7 (38.Qf5 Ne5 39.Qe5) 38...Ke4 39.Qe7 (39.Qc4 Ne5 40.de5) 39...Kd3 (39...Ne5 40.f3 Kd3 41.Qa3 Ke2 42.Qb2 Ke1 43.Rc1) 40.Rf6 (40.Qa3 Ke2 41.Rc2 Ke1 42.Qa1) 40...Nf6 41.Qf6 (41.Qf6 Kc4 42.Qf5 Kb4 43.b6 Kb3 44.b7 Kb2 45.b8Q Kc3 46.Qbb1 Kc4 47.Qc5) 1-0. abrak (2130) - Amplon (1730), Rated Blitz tournament, lichess.org, 2016.

5.Nf3 e4 6.Nd4 c5 7.Bb5 Bd7 8.Bd7 Nd7 9.Nf5 (9.bc5!? Nc5 10.Nc3+/–) 9...Qg5+= 10.g4 f6? (better is 10...h5!? 11.Nc3 hg4+/–) 11.h4 Qg6 12.Nc3 Ne5 (12...h5 13.Ng3+/–) 13.Ne4 Ng4 (13...cb4 14.ab4 Nh6 15.Ned6 Bd6 16.Nd6 Ke7 17.h5 (17.Nb7?! Qe4 18.f3 Nf3 19.Kf2 Ng4 20.Kg3 Nge5=) 17...Qg4 18.Qg4 Nhg4 19.Be5 Ne5 20.Nb7+–) 14.Ned6 Bd6 15.Nd6 Kd7 (15...Ke7 16.bc5 Nh2 17.Qe2+– (17.Nb7?! Rb8 18.c6 Qg2 19.Rh2 Qh2+–)) 16.bc5 (16.h5!? Ne3 17.de3 Qg2+–) 16...Ne7 (16...N4h6 17.Qf3 (17.Nb7 Qg2 18.c6 Kc6 19.Na5 Kd6+/–) 17...Rb8 18.0-0-0+–) 17.Qf3 (17.Qe2 Nh6 18.0-0-0 Ng4+–) 17...Rab8 (17...Rhb8 18.h5 (18.Nb7?! Qf5 19.c6 Kc7 20.Qf5 Nf5+–) 18...Qg5 19.Bd4+– (19.Nb7?! Qf5 20.c6 Kc7 21.Qf5 Nf5+–)) 18.Rg1 (18.h5 Qg5 19.Nf7 Qf5 20.Qf5 Nf5 21.Nh8 Rh8+–) 18...f5 (18...h5 19.e4 b6 20.Qd3 bc5 21.Nf7 Ke8 22.Nh8+–) 19.0-0-0 (19.Nb7?! Nh2 20.c6 Kc8+–) 19...Rhd8 (19...h5 20.Qe2 (worse is 20.Nb7 Rhc8+–) 20...b6 21.Qd3+–) 20.e4 Ke6 (20...h5 21.ef5 Qh7+–) 21.ef5 Qf5 22.Rde1 Kd7 23.Qg4 (better is 23.Nf5 Ng6 24.Qg4+–) 23...Qg4 24.Rg4 Kc6 (24...Rg8 25.Bg7 b6 26.Ne4+–) 25.d4 (25.Re7 Rg8+–) 25...b6 (25...Rd7 26.Rg7 Nd5 27.Reg1 Rg7 28.Rg7+–) 26.Rg7 (better is 26.Re7 bc5 27.dc5 Kc5 28.Nb7 Rb7 29.Rb7 a5+–) 26...Nd5 (26...bc5 27.dc5 Nd5 28.Rh7+–) 27.Re6 (better is 27.Nf7 bc5 28.Nd8 Rd8 29.Re6 Rd6 30.Rd6 Kd6 31.dc5 Kc5 32.Ra7+–) 27...Rd6 (27...Nf4 28.Rh6 bc5 29.d5 Nd5+–) 28.Rd6 Kb5 29.Rd5 bc5 30.Rc5 Kb6 31.Rh7 Rb7 32.Rh6 1–0. GuestWRJS – GuestQWJW, freechess.org, 2017.

5.c4 dc4 6.Bc4 a5 7.Nf3 (7.Qa4 Qg5 8.Qb3 Nh6=) 7...e4+= 8.Nd4 Ne5 9.Ba2?? (better is 9.Qa4 Qd7 10.Bb5+=) 9...Nd3–+ 10.Ke2 Nb2 11.Qc2 Nd3 12.Nc3 c6 (12...ab4 13.Ne4 Qe4 14.Qd3 Qd3 15.Kd3–+) 13.Ne4 Qe4 14.Qd3 Qg2 15.Qc4 (15.Nf3 Bg4 (15...ab4?! 16.Rhg1 Qg1 17.Rg1–/+) 16.Qe4 Ne7–+) 15...Bg4 16.Kd3 Nh6 (16...Qf2 17.Rhf1 Be2 18.Ne2 0-0-0 19.Nd4 Qh2 20.ba5+=). ftyre – rensoli (2705), net–chess.com, 2004.

5.c4 c5 6.cd5+– cb4 7.d4 (7.ab4 Ngf6 8.Nc3 Qb4+–) 7...e4 (7...ed4 8.Qd4 Ngf6 9.Nh3=) 8.Qa4 (better 8.ab4!? Ngf6 9.Nc3+–) 8...Ngf6= 9.Bc4 b6 (9...Kd8 10.d6 Qd6 11.Bf7=+) 10.Ne2+= Qd6? (10...Bb7!? 11.0-0 a6 (11...Bd5?? 12.Bd5 Nd5 13.Qc6+–) 12.ab4 Qb4+=) 11.Ng3 (better 11.Nd2+–) 11...g6?? (better 11...Bb7 12.Nf5 Qc7+–) 12.Nd2+– Nd5 (12...Bg7 13.Nde4 Ne4 14.Ne4 Qe7+–) 13.Nge4 Qe6 (13...Qb8 14.Bd5 f5+–) 14.Bd5 Qd5 15.Nf6 Kd8 16.Nd5 Bb7 17.Nb4 Bg2 18.Rg1 Bh3 19.Nc6 Kc7 20.Rc1 Kb7 21.Na5! Kb8 (21...ba5 22.Qc6 Mate attack) 22.Qc6 (22.Qc6 Nc5 23.Rc5 Bc5 24.Qb7) 1–0. GuestWXSH – GuestVCLS, freechess.org, 2019.

5.d3 Nc6 6.b5 Ne5 7.de4 de4 8.Qd4 +=.

5.d3 Bf5 6.de4 Be4 7.Nc3 g6?? (better is 7...Nf6=) 8.Ne4+– Bg7 (8...f6 9.Qd5 c6+–) 9.Bg7 Qe4 (9...de4 10.Bh8 Nf6 11.Qd4+–) 10.Bh8 Nc6 11.Bd4 (11.Nf3 0-0-0+–) 11...Nge7 (11...Nd4 12.Qd4 Qc2 13.Ne2+–) 12.Qd3 (12.Bc3 Ne5+–) 12...Nf5 (12...Nd4 13.Qd4 Qd4 14.ed4+–) 13.Qe4 de4 14.Bb5 0-0-0 (14...Nfe7 15.Nh3 0-0-0 16.Bb2+–) 15.Bc6 bc6 (15...Nd4 16.Be4 Ne6 17.Nf3+–) 16.Ba7 Kb7 17.Bd4! Nd4 18.ed4 Rd4 19.Rd1 Rc4 20.Rd2 (20.Rd7 Rc2 21.Rf7 h5+–) 20...c5 21.bc5 Rc5 22.Kd1 (22.h4 Ra5+–) 22...f5 (22...Ra5 23.Re2 Ra4 24.Re3+–) 23.Ne2 (23.h4 Rb5 24.Ne2 Rb1 25.Nc1 Kc8+–) 23...g5 (23...Ra5 24.Rd7+–) 24.g3 (24.Nd4 Rd5+–) 24...Rb5 25.Kc1 Ra5 26.Kb2 c5 (26...h6 27.Rhd1 Rb5 28.Kc3+–) 27.Rd7 Kc6 (27...Kb6 28.Rh7 Rb5 29.Ka2+–) 28.Rh7 c4 (28...Rb5 29.Ka2 Rb8 30.Rh6 Kc7 31.Rf6+–) 29.c3 (29.h4 g4+–) 29...Kd6 30.Nd4 f4 31.gf4 gf4 32.Rf7 (32.Rg1 Rd5 33.Rg6 Ke5 34.Re7) 32...f3 33.h4 (33.Rg1 e3 34.Rg6 Kd5 35.Re6 Rb5 36.Kc2 Rb2 37.Kb2 e2 38.Rf5) 33...Rh5 34.Ra7 (better is 34.Rg1 e3 35.fe3 Kd5+–) 34...e3 35.fe3 f2 36.Rf7 Ke5 37.Rf2 Ke4 38.Rh3 Kd3 39.a4 (39.Rf4 Rc5 40.e4 Kd2 41.Rf2 Ke1 42.Re2 Kd1 43.Rh1) 39...Ke4 40.Ka3 Kd3 41.Kb4 (41.Kb4 Ke4 42.Kc4+–) 1–0. minn (2000) – pauldopson, net–chess.com, 2003.

5.d3 Nf6 6.Be2 Nc6 7.h3 (7.de4 de4 8.b5 Nd8=) 7...ed3 (better is 7...a6!?–/+) 8.cd3= b5 (8...Qe6!?=) 9.d4+= h5 (9...a5!?+=) 10.Nc3 (10.Bb5 Bd7 11.Bd3 g6+–) 10...a6+/– 11.Nf3 g6 (11...Qd6 12.Qc2+–) 12.Ne5+– Ne5 13.de5 Nd7?? (13...Qe5 14.Qc1 Qe6 15.Nd5 A) < 15...Qd5 16.Bf6 Qg2 17.Rh2 (17.Bh8 Qh1 18.Kd2 Qd5 19.Ke1 c5–+) 17...Qg1 18.Bf1+–; B) 15...Nd5 16.Bh8 Bb7+–) 14.Nd5 Qg5 (14...Qd8 15.Qc2 c5 16.Qe4+–) 15.Nc7 Kd8 (15...Ke7 16.h4 Qf5 17.Na8 Ne5 18.Qc1+–) 16.Na8 Bb7 17.Nb6 Qe7 18.Nd7 (18...Qd7 19.e6 Qd1 20.Rd1 Ke7 21.Bh8 Ke6 22.Rg1+–) 1–0. lokia (1635) – donsjostedt (1605), net–chess.com, 2007.

5.d3 Nf6 6.Ne2 Nc6=.

5.d3 Nf6 6.de4 de4 (worse 6...Qe4 7.Bf6 gf6 8.Nf3+–) 7.Bc4 (7.Nd2 Nbd7=) 7...Nbd7 8.Ne2 Nb6 (8...Ne5 9.Bb3=) 9.Bb3 Bg4 10.0-0 Nfd7 (10...c5 11.bc5 Qc5 12.h3=) 11.h3 Bh5 (11...Be6 12.Nd2=) 12.c4 (12.Qe1 Bg6+=) 12...0-0-0 (12...c5 13.Bc3=) 13.Qc2+= Ne5 (13...Be2!? 14.Qe2 Ne5+=) 14.Nf4+– (14.Qe4?! Be2 15.Qe5 Qe5 16.Be5 Bf1 (worse 16...Nc4 17.Bc4 Bc4 18.Rc1+–) 17.Kf1 c5=) 14...Bg6 15.c5 Na8 (15...Nbd7 16.Ng6 hg6 17.Qe4+–) 16.Ng6+– hg6 (16...Nf3 17.Kh1 hg6+–) 17.Qe4 f5?? (17...f6+–) 18.Qe5 Qg5 (18...Qe5 19.Be5 Re8 20.f4+–) 19.f4 (19.Nc3!? Kb8+–) 19...Qg3 20.Qe6 Kb8 21.Rf3 Qe1 22.Rf1 (22.Kh2!? Qe2 23.Be5 Qb5+–) 22...Qg3 23.Rf3 Qe1 24.Kh2 Rh3 (24...Rh6+–) 25.Rh3 (25.Rh3 Qe2 26.Be5+–) 1–0. DEFFM – JayGatsbyTwo, freechess.org, 2018.

5.Ne2 Nf6 6.Nf4 c6 7.Nh5 Nbd7 8.d3 g6 9.Ng3 Bg7 10.Nd2 0-0 11.Be2 Ne5 12.h4 (better is 12.de4!? Rd8 13.ed5 Nd5 14.Bd4+=) 12...ed3+= 13.cd3 Nfg4 14.d4 Qf6 Do you see the mate threat? 15.Rf1 h5? (better is 15...Qh4!? 16.de5 Ne3 17.fe3 Qg3 18.Rf2 Be5+=) 16.de5+– Ne5 17.Be5 Qe5 18.Rb1 Qe7 19.Qc2 Qh4 20.Rh1 Qf6 21.Nf3 Re8 22.Nd4 White prepares b5@aBb4b5 22...h4 23.Nf1 Bf5? (better is 23...Be6!?+/–) 24.Nf5+– gf5 25.b5 cb5 26.Rb5 Opening the c–file gets White a lot of play 26...Rac8 27.Rc5 Qa1 28.Kd2 Rc5 29.Qc5 Qb2 30.Qc2 Rc8 The mate threat is Rxc2 31.Qb2 Bb2 32.Rh4 Ba3 33.Ng3 a5 34.Nf5 Bc5 35.Bf3 Rd8 36.Kd3 Ra8? (36...b5+–) 37.Bd5 Ra7 (37...Rd8 38.Kc4 Rc8 39.Kb5+–) 38.g4 (38.Nh6 Kg7 39.Nf7 a4+–) 38...a4 (38...b5 39.Rh5+–) 39.g5 Kf8 (39...b5 40.g6 Be3 41.Bf7 Rf7 42.gf7 Kf7 43.fe3 Kg6+–) 40.Rh8 1–0. King,Roger – Lauffer,Andreas, IECG, 2001.

5.c4 c6 6.c5 Nd7 7.Nf3 0-0-0 8.Qa4 Kb8 9.Nc3 d4 10.Ne2 d3 11.Nc3 e4 12.Nd4 Bg4 13.h3 Bh5 14.g4 Bg6 15.Bg2 h5 16.0-0-0 hg4 17.hg4 Rh1 18.Rh1 Ngf6 19.Bh3 Ne5 20.g5 Nfd7 21.Bd7 Nd7 22.Nc6 bc6 23.Qc6 Ne5 24.Qb5 Ka8 25.Ne4 Be4 26.Rh8 Rb8 27.Qa4 Qe6 28.b5 Qg4 29.Kb1 Qg1 30.Ka2 Nc4 31.Qc4 Bf5 32.Qd5 Rb7 33.Rf8 Normal 1-0. fedorstar (1800) - dbronstein2 (1750), Rated Blitz game, lichess.org, 2015.

5.d4 ed4 6.Bd4 Nf6 7.c4 a5 8.c5 ab4 9.Nf3 ba3 10.Be2 a2 11.Nc3 Nc6 12.Qb3 Nd4 13.Nd4 (13.ed4 c6=+) 13...Qc5=+ 14.0-0 (14.Nf5 Qb4 15.Bb5 c6–+) 14...Bd7 15.Rfc1 (better is 15.Qb7 Rc8 16.Ncb5=+) 15...Qd6?? (better is 15...Ra3 16.Qb2 Qb4 17.Ra2 c6–/+) 16.Ncb5+– Bb5 17.Nb5 Qe5 (17...Qb4 18.Nc7 Kd8 19.Qb4 Bb4 20.Na8 Ke7 21.Ra2 Rb8+–) 18.Nc7 Kd7 19.Qb5 Kd6 (19...Kc8 20.Na8 Kd8 21.Qb6 Ke7 22.Qb7 Ke6 23.Qc8 Nd7 24.Nc7 Kf6 25.Qd7+–) 20.Qc5 (better is 20.Qb7 Rb8 21.Qb8 Kd7+–) 20...Kd7 21.Bb5 Kd8 22.Qb6 Qd6 (22...Bc5 23.Qc5 Rc8 24.Ra2 Qc7 25.Qc7 Rc7 26.Ra8 Ke7 27.Rc7 Kd6 28.Rh8 Kc7 29.Rf8+–) 23.Nd5 (23...Qb6 24.Nb6+=; better is 23.Na8 Qb6 24.Nb6+–) 1–0. slavisa11 – karvapawnov, Live Game Caissa's Web, 2004.

5.d4 e4 6.c4 Nf6 7.c5 (7.cd5 Nd5 8.Ne2 Nd7=) 7...Ng4 8.Qa4 c6 9.b5 (9.Nc3 Qh4 10.Nh3 Be6=) 9...Qf6 (better 9...Qh4 10.g3 Qf6=) 10.b6? (10.h3 Qh4 11.g3 Qh6=) 10...a6 (10...Bc5 11.h3 Nf2 12.Kf2 Bg4 13.Ke1 Qh4 14.Kd2 Bb6=+) 11.Nc3= Bd7 (11...Nd7 12.h3 Qh4 13.Nd1=) 12.Nh3 Be7 13.Nf4 (13.Be2 Qh4 14.0-0 Rg8 15.Bg4 Qg4+= (15...Bg4 16.Nd5 Bd8 17.Nc7 Bc7 18.bc7=)) 13...0-0 (better 13...Nf2 14.Kf2 g5=+) 14.f3?? (better 14.Be2=) 14...Ne3–+ 15.fe4? (15.g3 g5 16.fe4 gf4 17.e5–+) 15...Qf4 16.Qb3 (16.Qb3 Ng2 17.Kd1 Ne3 18.Ke2 de4 19.Ne4 Bg4 20.Kd3–+; 16.g3 Qf3 17.Rg1–+). MARYMARY – Zeph153, ChessWorld.net, 2014.

5.Nf3+= Nd7 6.Nc3 Ngf6 7.Bd3=.

5.Nf3 Nd7 6.Be2 g6 7.d3 Bg7 8.h3 Ngf6 9.e4 Be6 10.c4 0-0 11.Nc3 Nh5 12.g3 c6 13.Bc1 f5 14.Bg5 Qe8 15.ef5 Bf5 16.g4 (better is 16.Nh4!? e4 17.d4=) 16...e4–/+ 17.de4?? (better is 17.Ne4 Be4 18.de4 Ba1 19.Qa1 Qe4 20.Qd4 Qb1 21.Qd1 Qd1 22.Kd1–+) 17...Bc3–+ 18.Kf1 Be4 19.Rc1 Bf6 20.gh5 (20.Bf6 Nhf6 (20...Rf6?! 21.gh5 Ne5 22.Ne5 Bh1 23.Ng4–+; 20...Ndf6?! 21.gh5 Nh5 22.Rg1–+) 21.Qd6 Ng4 22.hg4 Bf3 (22...Rf3?! 23.Bf3 Bf3 24.Rh3 Bg4 25.Re3–+) 23.Bf3 Rf3–+) 20...Bf3 (20...Bg5!? 21.Rc3–+) 21.Bf3 Bg5 22.hg6 (22.Rc3 Qe5 23.Qc2 Qf6–+) 22...Qg6 (better is 22...Bc1 23.gh7 Kh8–+) 23.Rc3 Ne5 24.Bh5 Qf5 25.Qe1 (25.Rh2–+) 25...Bh4 26.Rg1 (26.Bg4 Qf2 27.Qf2 Rf2 28.Kg1 Raf8–+) 26...Kh8 27.Bg4 (27.Rg2 Qh5 28.Qe2 Nf3–+) 27...Qf2 28.Qf2 Rf2 29.Ke1 Rc2 (29...Rc2 30.Rcg3 Rc3–+) 0–1. Fournier,Frederic (1685) – LucasGrijander (1655), Active, 2006.

5.Nf3+= f6 6.Be2 (6.Nc3 d4 7.Ne2 de3 8.fe3 Nc6+/–) 6...Nc6+= 7.b5 Na5 8.0-0 c6 (8...0-0-0 9.d4+=) 9.Nh4 g6 (9...Nh6!?+/–) 10.Nf5+– gf5 11.Bh5 (11.bc6 Nc6 12.Bh5 Kd7+–) 11...Kd7 (11...Kd8 12.bc6 Nc6 13.c4 dc4 14.Nc3+–) 12.Qf3 (12.d3 Qe6+–) 12...e4 (12...Nc4!? 13.Bc3 Nh6+/–) 13.bc6 (13.Qf5 Qe6 14.Qe6 Ke6+–) 13...Nc6 (13...bc6 14.Qf5 Qe6 15.Qe6 Ke6 16.Bc3+–) 14.Qf5 Qe6 15.Qe6 Ke6 16.f3 ef3 17.Rf3 (17.Bg4 Kd6 18.Bf3 a6+–) 17...Be7 (17...Bd6 18.Nc3 Ne5 19.Rff1+–) 18.Bg4 Kf7 19.Nc3 Nh6 (19...Ne5 20.Bh5 Ke6 21.Rff1+–) 20.Bh5 Ke6 21.Nb5 (21.e4 Bc5 22.Kh1 d4+–) 21...Rag8 (21...Rac8 22.Raf1 Ne5 23.Rf4+–) 22.Nd4 (better is 22.Raf1 Ng4 23.Bg4 Rg4 24.Bf6+–) 22...Kd6?? (22...Nd4 23.ed4 Rg5+–) 23.Nc6 bc6 (23...Kc6 24.Bf6 Kd7 25.h3+–) 24.Bf6 Rf8 (24...a5 25.Rf4+–) 25.Be7 (better is 25.Bg7 Rf3 26.Bf3+– (26.gf3? Rg8–+; 26.Bh8?! Rf5 27.Be2 Nf7+–; 26.Bh6?! Rf6 27.Bf4 Rf4 28.ef4 Rb8+/–)) 25...Ke7 26.Rf8 (26.Rb1 Rb8 27.Rbf1 Rhf8+–) 26...Rf8 27.Rb1 Rf5 (27...Rd8 28.Kf2+–) 28.Be2 (better is 28.Rb7 Kd8 29.Be2+–) 28...c5? (28...Ke6+–) 29.Rb7 Kd6 (29...Kf6 30.Ra7 Nf7 31.a4+–) 30.Ra7 Kc6 (30...Nf7+–) 31.Ra6 Kb7 (31...Kc7 32.Rh6 Rf7 33.h4+–) 32.Rh6 c4 (32...Rf7 33.Bf3 Rd7 34.c4+–) 33.Rh5 (33.Rh7 Kc6+–) 33...Rf7 (33...Rf8 34.Bf3+–) 34.Rd5 Kb6 (34...Rc7 35.c3+–) 35.Bc4 h5 (35...Ra7 36.Rh5+–) 36.Rh5 (36.Rd6!? Kc5 37.Bf7 Kd6 38.Bh5 Kc5+–) 36...Rc7 37.d3 Ra7 38.Rh6 Kc5 39.Ra6 (better is 39.Ba6 Kd5 40.g4 Rg7+–) 39...Rb7 40.Bb3 Re7 41.Re6 Ra7 42.a4 (better is 42.d4 Kb5 43.c4 Ka5+–) 42...Kb4 43.g4 Kc3 44.g5 Kd2 45.h4 (better is 45.g6 Ke2 46.h4 Rc7+–) 45...Rh7 46.Rh6 Rg7 47.g6 Ke3 48.Bf7 Kf4 49.Rh7 Rg6 50.Bg6 Kg4 51.Rg7 (51.Kg2 Kf4 52.Re7 Kg4 53.Re4) 51...Kh4 (51...Kg3 52.a5 Kg4 53.a6 Kg3 54.a7 Kf4 55.a8Q Ke3 56.Re7 Kd2 57.Qa5 Kc1 58.d4 Kb2 59.Rb7 Kc1 60.Qe1) 52.Bf7 1–0. Trkn – classicJ, itsyourturn.com, 2000.

5.Nf3 Bg4 6.h3 Bf3 7.Qf3 Nf6 8.Nc3 c6 9.0-0-0 b5 10.Qf5 Nfd7 11.f4 a5 12.fe5 ab4 13.ab4 Qb4 14.e6 fe6 15.Qe6 Qe7 16.Qg4 Kd8 17.Qh5 Na6 18.Bb5 cb5 19.Nd5 Qe6 20.Qg5 Kc8 21.Nf4 Qe8 22.Rhe1 Nc7 23.e4 Ra6 24.d4 Ra2 25.Kb1 Ra6 26.d5 Qf7 27.Nd3 h6 28.Qg4 Kb7 29.Qg3 Ra4 30.d6 Qa2 31.Kc1 Ne6 32.e5 Ng5 33.h4 Ne6 34.Qf3 Kb8 35.Qc6 Ra7 36.Qb5 Rb7 37.Qc6 Ndc5 38.Qe8 Ka7 39.Kd2 Rb2 40.Nb2 Qb2 41.Ra1 Qa1 42.Ra1 Kb6 43.Rb1 Nb3 44.Rb3 Kc5 45.Qb5 Kd4 46.Rb4 1–0. Bonetti,Shane – Celes (2240), ICC, 2002.

5.g4 Bg6 6.d3 Nf6 7.Nd2 Nc6 8.h3 0-0-0 9.Ngf3 d4 10.e4 Nd7 11.Nc4 h5 12.g5 f6 13.h4 f5 14.Nfd2 b5 15.Na5 Na5 16.ba5 Qc5 17.Nb3 Qc6 18.Rc1 fe4 19.Bg2 Nc5 20.Qe2 ed3 21.Bc6 de2 22.Bb5 d3 23.cd3 Nd3 24.Bd3 Bd3 25.Be5 Bd6 26.Bg7 Rhe8 27.Bf6 Rd7 28.Rc3 Ba3 29.Bd4 Bb4 30.Rh3 Bc3 31.Bc3 Bc4 32.Nd2 Rd5 33.Re3 Re3 34.fe3 Rf5 35.Nc4 Rc5 36.Ke2 Rc4 37.Bd4 Rc2 38.Kd3 Rh2 39.Ba7 Rh4 40.Bd4 Rg4 41.Bf6 h4 42.Ke2 Time forfeit 1-0. papopapirus (1655) - martinz (1625), Rated Blitz game, lichess.org, 2015.

5.c4 Be6 6.cd5 Bd5 7.Nc3 Nbd7 (7...Be6 8.Nf3 Bg4 9.h3+=) 8.Nd5 Nd5 9.Bc4 (9.Qc2 Rc8=) 9...N7b6 (9...c6 10.Rc1=) 10.Bb3 (10.Bd5 Nd5 11.Qh5 a5+=) 10...0-0-0 (10...a5 11.ba5 Ra5 12.Ne2=) 11.Nf3 (11.Qg4 Kb8+=) 11...f6 (11...e4!? 12.Nd4 Qg5+=) 12.Rc1+= g5 13.h3 (13.0-0 Kb8+=) 13...h5 14.b5 (14.Qc2 Kb8+=) 14...Bg7 (14...Qe8 15.Qc2 Bd6 16.e4=) 15.a4 (15.Qc2!?=) 15...Nb4+= 16.Qe2?? (better is 16.Bc2+=) 16...Nd3–+ 17.Kf1 Nc1 (17...Nb2!? 18.d4 N6a4 19.Qc2–+) 18.Bc1 Qb4 19.Be6 (19.Qd1 Kb8–+) 19...Kb8 20.g3 (20.d4 Na4 21.Kg1 Nc3–+) 20...Qa4 21.Kg2 (21.Kg1 h4–+) 21...Qe4 22.Bb2 (22.Kg1–+) 22...g4 (22...g4 23.d4 ed4–+) 0–1. ncc_1701 – S, ChessWorld.net, 2005.

5.c4 Bg4 6.f3 Be6 7.cd5 Bd5 8.e4 =.

5.d4 e4 6.c4 c6 7.Nc3 g6 8.Qb3 Be6 9.cd5 Nd5 (9...cd5 10.Rc1=) 10.Bc4 (10.Ne4 Nd7+/–) 10...Nc3 11.Bc3 (11.Be6!? Nb5 12.d5+=) 11...Bc4+= 12.Qc4 Bg7 13.Ne2 Nd7 14.a4 Nb6 15.Qb3 Nd5 16.0-0 0-0 17.b5 Rfd8 18.Rab1 c5 19.dc5? (better is 19.Rfd1!?=) 19...Nc3–/+ (19...Qc5?! 20.Bg7 Kg7 21.Rbc1+=) 20.Nc3 Rd3 21.Rbc1 Qe5 22.c6 bc6 (22...Rc3?! 23.Rc3 Qc3 24.Qc3 Bc3 25.Rc1+=) 23.bc6 Rc3 24.Qb7 Re8 25.Rc3 (25.Qa7 Qd6 26.Qa6–+) 25...Qc3 26.h4 Be5 27.g4 Bd6 28.Rd1 Qe5 29.Kf1 Bc7 (better is 29...Qh2 30.Qd7 Qh1 31.Ke2 Qf3 32.Ke1 Bb4 33.Kf1 Kg7–+) 30.Rd7–/+ Bb6 31.c7 (31.Rf7 Qc3 32.Kg2+=) 31...Qc3?? (better is 31...Qc5–+) 32.Qb8= Qc1?? (better is 32...Qc4 33.Kg2 Qe6=) 33.Kg2+– Rb8 (33...Rf8 34.Rd8 Qc7 35.Rf8 Kg7+–) 34.cb8Q Kg7 (34...Qc8 35.Qc8 Bd8 36.Rd8 Kg7 37.Rg8 Kf6 38.Qc6 Ke5 39.Re8) 35.Qe5 Kh6 (35...Kg8 36.Qe8 Kg7 37.Qf7 Kh8 38.Qh7) 36.Qf4 Kg7 37.Qf7 Kh8 38.Qh7 1–0. waycoolguy (2080) – nbh999 (1930), ChessWorld.net, 2003.

5.Be2 e4 A) 6.h4 A1) 6...Bf5 7.Nh3 (7.b5 h5 8.Nc3 Nbd7 9.Nh3 Ne5 10.Nf4 0-0-0 11.Na2 g6) 7...Nc6 8.Nf4 Ne5 9.Bd4 0-0-0 10.Nc3 Kb8 11.Qb1 c6; A2) 6...Nc6 7.Nh3 Bf5 8.Nf4 0-0-0 9.g4 Be6 10.g5 Nd7 11.Nc3 Nb6; B) 6.Nc3 Nc6 7.b5 (7.d4 g6 8.b5 Nd8 9.Qd2 Bg7 10.a4 Bf5 11.Ba3 Qd7; 7.Nb5 h6 8.h4 a6 9.Nd4 Nd4 10.Bd4 Bd7 11.Nh3 g5; 7.Bb5 a5 8.Nge2 Qd6 9.Ba4 Be7 10.Nb5 Qd8 11.Nbd4 Qd7) 7...Na5 8.d3 Be6 9.Nh3 ed3 10.cd3 d4 11.ed4 Nb3.

5.Be2 g6 6.Nf3 Nbd7 7.0-0 Bg7 8.d3 c5 9.bc5 e4 10.de4 de4 11.c6 ef3 (better is 11...bc6!? 12.Nd4 c5=) 12.cd7+/– Bd7 13.Bf3 Rd8 14.Qe2 0-0 15.Bb7?? (better is 15.Bc3 Ne4 16.Bg7 Kg7 17.c4+=) 15...Rb8–/+ 16.Qf3 (better is 16.Qa6 Bf5 17.Bd4 Qb7 18.Qa7 Qa7 19.Ba7–/+) 16...Bg4?? (better is 16...Bf5–+) 17.Bf6= Qf6 18.Qg4 Qa1 19.Nd2 (better is 19.Qe4=) 19...Qc3–+ 20.Nb1 Qc2 21.Qf3 Qb3 22.Be4 Rfd8 23.Qe2 Rd6 24.Bc2 (24.Rc1 Rbd8 25.Bf3 Bb2–+) 24...Qb2 (24...Qa2!? 25.Rd1 Rdb6 26.Qd3–+) 25.Qc4–/+ Rbb6 26.Bd3 Rb3 27.Be4 Bh6 28.Bd5? (better is 28.h3+=) 28...Rd5!–+ 29.Qd5 Qb1 30.Qd8 (30.Qa8 Bf8 31.Qa7 Qd3–+) 30...Bf8 31.Qa5 (31.a4 Qd3 32.Qd3 Rd3–+) 31...Qb2 (better is 31...Qd3!? 32.Qe1–+) 32.a4 Rb7 33.g3 Qb4 34.Qa6 Bc5 35.Rd1 Qb6 36.Qc4 Qb4 37.Qa6 Qb3 38.Rd8 Bf8 39.Qd6 Qb1 40.Kg2 Qe4 41.Kh3 Qe7 42.Qd4 (42.Qe7 Re7 43.g4 Kg7–+) 42...Rb4 43.Qd5 Ra4 44.Rd7 Qe6 45.Kg2 Qd5 46.Rd5 a5 47.Rd8 Rb4 48.Ra8 a4 49.Kh3 Rc4 50.f3 a3 51.e4 Rc6 52.f4 (52.Kg4 h5 53.Kf4 f6–+) 52...Rb6 (52...Rc2 53.f5–+) 53.f5 Rb5 (53...Rb2 54.Kg4–+) 54.fg6 (54.Kg4 Rb2–+) 54...hg6 55.Ra4 (55.Kg4–+) 55...Bb4 56.Ra8 Kg7 57.Kg4 (57.Ra3 Ba3 58.Kg4 Kf6–+) 57...Ra5 (better is 57...Ba5 58.Rc8 a2 59.Rc1–+) 58.Rb8 (58.Rd8–+) 58...a2 59.Rb4 a1Q 0–1. mikebaldini (1705) – rongmove (1725), gameknot.com, 2014.

5.Be2 g6 6.Nf3 e4 7.Nd4 Bg7 8.Nc3 0-0 9.0-0 a5 10.b5 Nbd7 11.f3 Nc5.

5.Be2 g6 6.Nf3 Bg7 7.Ne5 (7.Be5 Nc6 8.Bf6 Qf6 9.Nc3 0-0 10.0-0 Qd6 11.Nb5 Qe7) 7...0-0 8.d4 Nc6 9.Nd2 a5 10.Bc3 Re8 11.0-0 ab4.

5.Be2 g6 6.h3 Bg7 (6...a6 7.c4 (7.Nf3 Nc6 8.0-0 Bg7 9.d4 ed4 10.ed4 Bf5 11.Nc3 0-0) 7...Nc6 8.Nc3 dc4 9.Bc4 Be6 10.Be6 Qe6 11.Nf3 Be7; 6...Nc6 7.b5 Na5 8.Nf3 e4 9.Nd4 Bg7 10.Nc3 0-0 11.0-0 Bd7; 6...Bh6 7.Nf3 e4 8.Nd4 0-0 9.0-0 a5 10.Nc3 Nc6 11.Nc6 bc6; 6...a5 7.Nc3 ab4 8.ab4 Ra1 9.Qa1 Nc6 10.Na2 Bg7 11.b5 Nb8) 7.Nf3 Nbd7 (7...e4 8.Nd4 0-0 9.Nc3 Nbd7 10.0-0 Ne5 11.f4 ef3) 8.c4 (8.Nc3 0-0 9.0-0 e4 10.Nd4 Ne5 11.f4 ef3) 8...0-0 (8...e4 9.Nd4+= dc4 10.Bc4 a5 11.Nc3 Ne5) 9.d4= (9.cd5 e4 10.Nd4 Nd5 11.Nc3 Nc3) 9...e4 (9...ed4 10.Bd4 c5 11.bc5 Nc5) 10.Nfd2 c6 (10...a5 11.ba5 c5) 11.c5 (11.0-0 dc4) 11...Re8 (11...Rd8=) 12.a4 Nf8 13.a5 h5 14.Nc3 h4 15.Nb3 Rb8 16.Na4 (16.b5 Ne6+=) 16...Qd7 17.Kd2 (17.0-0!?+=) 17...Qf5 18.Qg1 Bh6 19.Rf1 N8h7 20.g4 Qe6 21.Kc2 Ng5 22.Nd2 Nd7 23.Bc3 b6 24.ab6 ab6 25.f4?? (better is 25.cb6 Nb6 26.Nc5+=) 25...ef3–+ 26.Bf3 (26.Nf3 Nf3 27.Rf3 Be3–+) 26...bc5 (26...Nf3?! 27.Rf3 Be3 28.Qe1 bc5 29.Nc5 Nc5 30.bc5–+) 27.Nc5 Nc5 28.dc5 Ba6 29.Ra1 (29.Qf2 Nf3 30.Qf3 Bf1 31.Rf1 Be3 32.Qf6 Qf6 33.Rf6–+) 29...Nf3 30.Nf3 (30.Qg2 Nd2 31.Bd2–+) 30...Qe4 31.Kc1 Qf3 0–1. Blasig,Volker (1855) – Bakalarz,Mieczyslaw (2315), Luxembourg op, 1996.

5.Nf3 e4 6.Nd4 c5 7.bc5 Qc5 8.Nc3 Be7 9.Nb3 Qc7 10.Nb5 Qd7 11.Be5 a6?? (better is 11...Na6=) 12.Nc7+– Kd8 (12...Kf8 13.Na8 Nc6 14.Nb6+–) 13.Na8 Nc6 14.d4 Bd6 (14...Qf5 15.Bf4+–) 15.Nb6 Qc7 (15...Qe6 16.Bf6 Qf6 17.Nd5+–) 16.Bf6 gf6 17.Nd5 Qa5 (17...Qd7 18.c4 Qe6+–) 18.Na5 (18...Na5 19.Nf6+–) 1–0. Trkn – guest433, ICC, 2004.

5.Nf3 e4 6.Nd4 c6 7.Be2 Qc7 8.d3 Bd6 9.de4 Ne4 (9...de4 10.c4=) 10.Nd2 0-0 11.N4b3 (11.c4 Nd2 (worse is 11...Bh2 12.cd5 Nd2 13.Qd2+/–) 12.Qd2 dc4 (worse is 12...Bh2 13.g3 Bg3 14.Qd3+/–) 13.Bc4 Rd8=) 11...Re8 (11...Bf5 12.Nd4 Bg6 13.c4 dc4 14.Bc4=) 12.h3 (12.c4 Nd2 13.Nd2 Be6=) 12...Bf5 13.Nd4 Bg6 14.c4 Nd2 (14...a5 15.b5=) 15.Qd2 dc4 16.Bc4 Nd7 17.Rd1 Ne5 (better is 17...Nb6!? 18.Bb3 Rad8=) 18.Be2+= Rad8 19.Qc3 Bf8 20.0-0 Nd7 21.Nb5 Qb8 22.Nd6 Re6 23.Nc4 f6 (23...Be4 24.Nd2 Bd5 25.e4+=) 24.Rd2 Qc7 25.Rfd1 Ree8 26.Qd4 c5 (better is 26...b5 27.Na5 a6+/–) 27.Qf4 (better is 27.Qg4 Nb6 28.Rd8 Rd8 29.Rd8 Qd8 30.Nb6 ab6 31.Bc4 Bf7 32.Bf7 Kf7 33.Qc4 Kg6 34.Qc2 Kh6 35.Bc3+/–) 27...Qf4+= 28.ef4 cb4 29.Bg4 f5 30.Bf3 (worse is 30.Rd7 Rd7 31.Rd7 fg4 32.ab4 Re1 33.Kh2 Rb1–/+) 30...Bf7 31.Nd6 ba3 32.Ba3 (worse is 32.Nf7 Kf7 (32...ab2?? 33.Nd8 Rd8 34.Rb2+–) 33.Rd7 Rd7 34.Rd7 Ke6 35.Rb7 ab2 36.Rb2 Kf6+=) 32...Bb3 (32...Bd6 33.Rd6 Be6+/–) 33.Rb2 (33.Ne8?! Bd1 34.Bf8 A) worse is 34...Kf8 35.Ng7 (worse is 35.Rd1 Ke8 36.Ra1 Nc5+=) 35...Bf3 36.Ne6 Ke7 37.Nd8+=; B) 34...Re8 35.Rd1 Nf8=) 33...Bd6 34.Rd6 Bc4 35.Rb7 Nb6 36.Rd8 (worse is 36.Ra7 Rd6 37.Bd6 Nc8–/+) 36...Rd8 37.Ra7 Rd7 38.Bb7 (38.Rd7 Nd7 39.Kh2 Nf6+/–) 38...Ba6 39.Ra6 Rb7 40.g4 fg4 41.hg4 Nc4 42.Kg2 g6 43.Bc5 Rc7 44.Bd4 Rd7 45.Bc3 Kf7 46.Rf6 Ke7 (46...Ke8 47.Rc6 Nd6 48.Kf3+/–) 47.Rc6 (47.g5 Rd3 48.Bb4 Kd8+/–) 47...Nd6 48.Bb4 Ke6 49.Kf3 Kd5 (better is 49...h6+–) 50.Rd6 Rd6 51.Bd6 Kd6 52.g5 Kd5 53.Ke3 (53.Ke3 Ke6 54.Ke4+–) 1–0. Naeter,Burkhard (2010) – Lilja,Gunnar, IECC, 1999.

5.Nf3 Bg4 6.Be2 e4 7.Nd4 Be2 8.Qe2 a6 9.0-0 h5 (9...a5 10.b5=) 10.c4 c5 11.bc5 Qc5 12.cd5 Qd5 13.Nc3 Qd7 14.f3 Nc6 (better 14...ef3!? 15.Qf3 Nc6+/-) 15.Ne4+- Ne4 16.fe4 f6 17.Nc6 Qc6 18.e5 Be7 (18...fe5 19.Be5 Qe4 20.Bd4+-) 19.ef6 gf6 20.Rac1 Qd6 21.Bd4 h4 (21...Qa3 22.Qf3 Qd6 23.Qb7+-) 22.Qd3 Qa3?? (22...Rg8 23.Qf5 Rd8+-) 23.Qg6 Kd7 24.Qf5 Ke8 25.Bf6 Bf6 26.Qf6 Rf8 27.Qe6 Kd8 28.Qd5 Ke8 29.Rc7 Rf1 30.Kf1 Qf8 31.Kg1 Qf6 32.Qg8 Qf8 33.Qe6 (33.Qe6 Qe7 34.Qe7) 1-0. marekt (2180) - freccia (1645), gameknot.com, 2020.

5.Nf3 Bg4 6.Be2 Bf3= 7.Bf3 e4 8.Be2 Nc6 9.0-0 0-0-0 (9...Qe6 10.d4=) 10.c4 (better is 10.d4+=) 10...d4? (better is 10...dc4 11.Bc4 Kb8=) 11.b5+– d3? (better is 11...Na5 12.ed4 Qe8+–) 12.Bg4 (12.bc6?! de2 13.cb7 Kb7 14.Qe2 Qd7+–) 12...Ng4 13.Qg4 (13...Qd7 14.Qd7 Kd7 15.bc6 Kc6 16.Bd4+–; 13.bc6 Nh2 14.cb7 Kb8–+) 1–0. Wall,Bill – Toriano C, internet, 2000.

5.Nf3 Bg4 6.h3 Bf3 7.Qf3 a5+=.

5.h3 Qe6 6.Nf3 Bd6 7.Nc3 =+.

5.h3 g6 6.Nf3 (6.d4 ed4 7.Bd4 Bg7=) 6...Nbd7 7.c4 (7.d4 e4 8.Ne5 Bg7=) 7...c6 (7...e4 8.Nd4=) 8.cd5 cd5 (8...Nd5 9.e4 N5f6 10.Qc2=) 9.Be2 (9.Qa4 e4 10.Bf6 Qf6=) 9...Bg7 10.0-0 0-0 11.Nh2 (11.d4 e4 12.Ne5 Rd8=) 11...b6 (11...e4 12.Nc3=) 12.f4 (12.d4 e4=) 12...e4+= 13.Ng4 (13.Nc3 a5+=) 13...Ng4 14.Bg7 Kg7 15.hg4 Bb7 (15...d4 16.ed4 Qf6=) 16.g3 (16.Nc3 a5 17.Qb3 f6=) 16...Rac8 (16...d4 17.ed4 Qf6 18.Nc3–/+) 17.g5 (17.Nc3 a6+=) 17...f6 (17...d4+=) 18.Bg4 (18.gf6!? Nf6 19.Qa4–/+) 18...fg5–/+ 19.Nc3 gf4 20.gf4 Rcd8 (20...a6 21.Rc1–/+) 21.Bd7 (21.d4 a5–/+) 21...Rd7 (21...Qd7 22.Ne2 Qg4 23.Kh2 d4–+) 22.Rf2 (better is 22.Qg4–+) 22...d4 23.ed4 Rd4 24.Qe2 (24.Qg4 e3 25.de3 Qe3–+) 24...Rd3 25.Re1 (25.Nd1–+) 25...Rg3 26.Kh1 (26.Rg2 Qh4 27.Rd1–+) 26...Qh4 0–1. yulio – shoulders, ChessWorld.net, 2006.

6.Nc3 d4 7.Nce2 c5 8.Qb3=+.

6.Nc3 Be6 7.Qb3 (7.cd5 Nd5 8.Qc2 Nc3 9.Bc3 Nd7=) 7...Nbd7 (7...a5 8.cd5 Nd5 9.Bc4 ab4 10.Nd5 cd5 11.Bd5 ba3 12.Be5 Bd5 13.Qd5=+) 8.Nf3 (8.cd5 Nd5 9.Qc2 Nc3 10.Bc3 f6=) 8...g6 (better 8...dc4!? 9.Qc2 a5-/+) 9.d4 ed4 10.Nd4 Bg7 11.Be2 (11.cd5 Nd5 12.Ne6 fe6=) 11...0-0 12.0-0 Ne5 (12...dc4 13.Bc4 Bc4 14.Qc4=) 13.Ne6 (13.cd5 Nd5 14.Qc2 Nc3 15.Bc3 Bg4+=) 13...fe6 (worse 13...Qe6 14.cd5 cd5 15.Nb5+=) 14.Nd1 (14.cd5 ed5 15.Rad1 Qf7=) 14...Ne4 15.Qc2 White plans c5 15...Qh4 16.f3 (16.c5 Nd7=) 16...Nd6=+ 17.g3 Qe7 18.c5 Nf5 19.Ra2 Rae8 (19...Nd7 20.Bg7 Qg7 21.Bd3=) 20.Re1 (20.e4 de4 21.Qe4 Nd7+=) 20...a6 (20...Nf7 21.Bg7 Kg7 22.f4=) 21.Kg2 (21.e4 Nh6 22.f4 Nd7+=) 21...Nf7 22.Bg7 White gets the initiative 22...Kg7 23.e4 N5h6 24.Qc3 Qf6 25.Qf6 Kf6 26.Nf2 d4 27.Rd1 e5 28.Rad2 Rd8 (28...g5 29.f4 gf4 30.gf4+=) 29.f4+= ef4? (better 29...g5!?+=) 30.gf4+- (30.Rd4?! Rd4 31.Rd4 fg3 32.Kg3 Ne5+=) 30...g5 31.fg5 Ng5 32.Rd4 Rd4 33.Rd4 Re8 (33...Ke5 34.Rd7 Rf7 35.Rf7 Nhf7 36.Bc4+=) 34.Bd3 (34.Rd6!? Re6 35.Bc4 Rd6 36.cd6 b6+-) 34...Re7 35.Rd6 Kg7 36.h4 Ngf7 37.Kf3?? (better 37.Rd4+-) 37...Nd6-/+ 38.cd6 Rd7?? (better 38...Re6-/+) 39.e5+/- Nf7 40.Kf4 Nd6 41.ed6 Rd6 42.Be4 b6 43.Ng4 c5 44.bc5 bc5 45.Ne5 (45.h5 Rd4+/-) 45...Rb6 46.Nc4 Rb3 47.Bd5 Rc3 (47...Kf6 48.h5+=) 48.h5 (48.Ke5 Kg6+/-) 48...Kh6+= 49.Bf7 Rc1 (49...Kg7 50.Be6+=) 50.Ke5 Re1 51.Kd6 Rf1 52.Be8 Re1 53.Ne5?? (better 53.Bc6+/-) 53...Re5?? (better 53...c4-/+) 54.Ke5+- c4 55.Kd4 c3 56.Kc3 Kg7 57.Kb4 Kf8 58.Ka5 h6 (58...Ke8 59.Ka6 Kd8 60.Kb7+-) 59.Ka6 (better 59.Bc6 Ke7+-) 59...Ke8 60.Kb6 Kd7 61.a4 Kc8 62.a5 Kb8 63.Kc6 Ka7 64.Kd6 Ka6 65.Ke6 Ka5 66.Kf6 Kb6 67.Kg6 Kc6 (67...Kc6 68.Kh6 Kd7+-). zembelek (2090) - binibin (1940), Rated Blitz game, lichess.org, 2014.

6.c5 g6 7.Nf3 Nbd7 8.Nc3 Bg7 9.Be2 0-0 10.0-0 Ne8 11.Qa4 f5 12.d4 e4 13.Nd2 Ndf6 (13...f4 14.b5 Qe6 15.Nce4 fe3 16.fe3 Rf1 17.Rf1 Nc5 18.dc5 Bb2 19.Qb3=) 14.b5+= Bd7 15.b6 a6 16.Nb3 Bh6 17.Na5 Rb8 18.Bc1 Ng7 19.Rb1 Ne6 20.Qd1 f4 21.Rb3 g5 22.Rb1 Kh8 23.Rb2 Rg8 Black plans g4 24.Rb4 g4 25.ef4 Nf4 26.Be3 Ne2 (26...Qe6 27.Qd2 Qf5 28.Bd1+=) 27.Ne2 Be3 28.fe3 Nh5 29.Qe1. Janek – Gustave, internet, 2016.

6.d4 e4 7.cd5 cd5 8.Nc3 Qd8 9.Rc1 Be7 (9...a5 10.Qa4 Bd7 11.b5=) 10.Nge2 0-0 11.Nf4 Bg4 (11...Nc6 12.Qa4=) 12.Qb3 Be6 13.Nb5 (13.Be2 Nc6=) 13...Na6 (13...Nc6 14.Be2=) 14.Be2 Rc8 (14...Bf5!?=) 15.Ne6 (15.Rc8 Qc8 16.Na7 Qb8+/–) 15...fe6 (15...Rc1 16.Bc1 fe6 17.Na7+=) 16.Na7 (16.Rc8 Qc8 17.Na7 Qb8 18.Ba6 ba6+=) 16...Rc1+= 17.Bc1 Nc7 18.0-0 (18.Qa4 Qd6 19.Qa5 b6+=) 18...Qd7 (18...Bd6 19.Qa4+/–) 19.a4+/– Ra8 (19...Qd8 20.h3+=) 20.Nb5 Nb5 21.Bb5 Qd6 22.Bd2 Rc8 (22...Ng4 23.g3+/–) 23.h3 (23.a5 Ng4 24.g3 e5+/–) 23...Bd8 24.Be2 (24.a5 Bc7 25.g3 Rf8+/–) 24...Bc7 25.g3 h5 (25...Qe7 26.Rc1+=) 26.Kg2 h4 27.Be1 Bb8 28.Qb2 (28.a5 hg3 29.fg3 Rc1+/–) 28...g6 (28...e5 29.Bc3 (worse is 29.gh4 ed4 30.Rh1 d3+=) 29...ed4 30.Bd4 hg3 31.f4+/–) 29.Rh1 (29.a5 Qc7+/–) 29...g5 (29...Qc6 30.b5 Qc2 31.Qc2 Rc2 32.Bd1+/–) 30.g4 (30.gh4!? gh4 31.f4+–) 30...Nd7 (30...Qc6 31.a5+=) 31.a5+/– e5 (31...Qc6 32.Bd2 Qc2 33.Qc2 Rc2 34.Rd1+/–) 32.Bc3 ed4 (32...Kh7 33.de5 Ne5 34.Be5 Qe5 35.Qe5 Be5 36.Rd1+–) 33.Bd4 Rf8 (33...Nf8 34.Bd1+/–) 34.Bd1 (34.Bb5 Qe6+/–) 34...Rf7 (34...Kh7 35.Ba4+/–) 35.Ba4 (35.Bb3 Kh7+–) 35...Nf8 36.Qc3 (better is 36.Bc5!? Qd8 37.Bb3+/–) 36...Rf2+= 37.Kf2 Qg3 38.Kf1 (38.Ke2 Qg2 39.Kd1 Qh1 40.Kc2 Qg2 41.Kb1 Qg1 42.Kb2 Qf2 43.Ka3 Qf7+–) 38...Qf3 39.Kg1 (39.Ke1 Qh1 40.Kd2 Qg2 41.Kc1 Qf1 42.Kb2 Bd6+–) 39...Qg3= 40.Kf1 ½–½. jammboy – shoulders, ChessWorld.net, 2007.

6.cd5 Nd5 7.Nf3 Bg4 (7...e4 8.Nd4+=) 8.Be2 (8.e4 Nf4=) 8...Nd7 9.0-0 g5 (9...a5 10.Nc3=) 10.d4 (10.Nc3 Nc3 11.Bc3 Bg7+=) 10...e4= 11.Nfd2 Bf5 (11...Be2 12.Qe2 f5 13.Nc3=) 12.Qc2 Bg7 13.Nc3 Pawn e4, live or die! 13...N7f6 Black prepares the advance g4 14.Rfc1 a6 15.Nd5 Nd5 16.Qc5 (16.Nb3 Rd8+=) 16...g4 (16...Qf6 17.Bc4 b6 18.Ne4 Be4 19.Bd5 bc5 20.Be4–+) 17.Nc4 Bf8 18.Qe7 Be7 (18...Be7 19.Rab1 Rg8+=). Orlik,Adam – Polanski,Jerzy, corr Czerniakow mem, 1991.

6.Nf3 e4 7.Nd4 =.

6.Nf3 Bg4 7.Be2 (better is 7.cd5 cd5 8.Qa4 Bd7 9.Qc2=) 7...g6 (better is 7...Bf3 8.gf3 dc4 9.Bc4 b5=) 8.Ne5+/– Be2 9.Qe2 Bg7 (9...dc4!? 10.Nc4 Bg7+/–) 10.cd5+– cd5 11.Qb5 Kf8 12.0-0 a6 13.Qb6 Kg8 (13...Ne4 14.Ra2 Nd6 15.f4+–) 14.Rc1 h6 (14...Ne8 15.f4+–) 15.Rc7 Nfd7 16.Qb7 (16.Nd7!? Bb2 17.Ra2 Nd7 18.Qb7 Kg7 19.Rb2 Qe5 20.Rd7 Qb2 21.Rf7 Kg8+–) 16...Be5 17.Be5 (17.Qa8?! Bc7 18.Qd5 Nf6=) 17...Qe5 18.Nc3 (18.Qa8? Qc7 (18...Qa1?! 19.Rc1–/+) 19.Nc3 Nb6 20.Nd5 Na8 21.Nc7 Nc7–+) 18...Kg7 19.Rd7?? (better is 19.d4 Qd6 20.Na4+– (20.Qa8?! Qc7 21.Nd5 Qc2+=; 20.Nd5?! Ra7 21.Qa7 Qd5+–)) 19...Nd7= 20.Qd7 Rhd8 21.Qc6 d4 22.ed4 (22.f4 Qf5 23.e4 Qf4=) 22...Qd4+= 23.Rf1 Qd2 24.Ne4 Qd4 25.Nc5 a5 26.Qc7 Qd6 27.Qd6 Rd6 28.Nb7 Rd3 29.Na5 Ra3 30.Rb1 (30.g3 Rc3–+) 30...Rb8 31.Nc6 (31.Nc4 Ra4 32.Ne3 Rab4 33.Rb4 Rb4–+) 31...Rb6 32.Nd4?? (32.Ne5 Rb4! 33.Re1–+) 32...Rb4!! (32...Rb4 33.Nf5 Kf6–+) 0–1. touchdown – shoulders, ChessWorld.net, 2006.

6.Bb5 c6 7.Be2 g6 (7...Qe6 8.0-0+=) 8.0-0 Bg7 9.c4 (9.d4 e4 10.Nfd2 b5=) 9...0-0 (9...e4 10.Nd4=) 10.cd5 (10.d4 e4 11.Ne5 Rd8=) 10...cd5 (10...Nd5 11.Nc3=) 11.Nc3 b6 (11...a5 12.Qb3+=) 12.Rc1+= Bb7 (12...a6 13.d4 e4 14.Nd2+=) 13.Nb5 a6 14.Rc7 (14.Nc7 Rac8+=) 14...Rab8= 15.Ne5 ab5 (15...Qd8 16.Nd7 Nd7 17.Bg7 Kg7 18.Rb7 Rb7 19.Nd4=) 16.Bb5 (16.Qa1 d4 17.Bd4 Qd6 18.Nd7 Nd7 19.Rd7 Qc6+–) 16...Rfd8 17.Qa1 Qd6 18.Nd7 Nd7?? (better is 18...Ng4 19.f4 Bb2 (worse is 19...Qc7 20.Bg7 Rd7 21.h3=) 20.Qb2 Qc7 21.Nb8 Qb8–/+) 19.Rd7+/– Rd7 20.Bg7 Rc7? (better is 20...Re7+/–) 21.Be5+– Qe7 22.Bc7 Qc7 23.Qf6 (23.Rc1 Qe7+–) 23...Ra8 24.a4 Ba6 (24...Rc8 25.Ra1+–) 25.Qc6 Qc6 (25...Qd8 26.Ba6 Ra6 27.a5+–) 26.Bc6 Rc8 (26...Ra7 27.Ra1 Bb7 28.Bb7 Rb7 29.a5 ba5 30.ba5+–) 27.b5 Rc7 28.Bd5 Bc8 29.Bf3 (29.Bc6 Bd7+–) 29...Be6 (29...Ra7 30.Ra1+–) 30.Ra1 (30.a5 ba5 31.b6 Rc2+–) 30...Ra7 31.Bd1 (31.d4 Kf8+–) 31...Rc7 (31...Kg7 32.Rc1+–) 32.d4 f5 (32...Kf8 33.Bf3+–) 33.f3 (33.a5 ba5 34.Bf3 a4+–) 33...Bd5 (33...Rc3 34.e4+–) 34.Kf2 Kf7 (34...Ra7 35.Bc2+–) 35.a5 ba5 (35...ba5 36.b6 Rd7+–). Whiterose – shoulders, ChessWorld.net, 2007.

6.Nc3 g6 7.Nb5 Kd8 8.Nc3 (8.c4 c6 9.Nc3 d4=) 8...Bg7 9.Be2 c6 10.b5 Ke8 (10...e4 11.Nd4 c5 12.Nb3=) 11.d4 (11.0-0 a6 12.a4 h6=) 11...e4 12.Nd2 Kf8 (12...a6 13.bc6 bc6 14.Rb1+=) 13.bc6 (13.a4 Qe6+=) 13...bc6 14.Na4 Bh6 (14...Rb8 15.c4+=) 15.c4 Kg7 16.0-0 (16.Rb1 Rb8+=) 16...Rd8 17.Bc3 Ba6 18.Bb4 Qe8 (18...Qe6 19.Qc2+=) 19.Qc2 Rdc8 (19...Kg8 20.Ra2+/–) 20.Rab1 Rab8 (20...Rcb8 21.Nc5 Bc8 22.Nd7 Qd7 23.Nb3+/–) 21.Nc5 Nc5 22.Bc5 Qd7 (22...Rb1 23.Rb1 Ra8 24.Qa4+/–) 23.Qa4 Bc4 24.Bc4 (24.Nc4 dc4 25.Bc4 Ra8+–) 24...dc4+– 25.Nc4 (25.Ba7? Ra8 26.Nc4 Ra7–+) 25...Nd5 (25...Rb5 26.Qa7 (26.Ba7? Ra8–+) 26...Qa7 27.Ba7+–) 26.Ne5 (26.Qa7 Qa7 27.Ba7 Rb1 28.Rb1 Kg8+–) 26...Qc7 27.Rb8 (27.Ba7 Ra8 28.Qc6 Qc6 29.Nc6 Rc6–/+) 27...Rb8 28.Nc6 Rb2 (28...Ra8 29.Qc4 Nb6 30.Qb5+–) 29.Nb4 (29.Na7 Be3 30.Qe8 Bf2 31.Kh1 Ne3 32.Bf8 Kf6=) 29...Ne3?? (29...Ne7+–) 30.Qe8 Nf1 31.Bf8 (31.Bf8 Kf6 32.Nd5 Kg5 33.Nc7 Bf8 34.Qf7+–) 1–0. pierred – shoulders, ChessWorld.net, 2006.

6.c4 c6 7.d4 e4 8.Nfd2 g6 (8...Qe6 9.Nc3=) 9.c5 (9.Nc3 Bg7+=) 9...Bg7= 10.Nc3 0-0 11.b5 (11.Be2 b6=) 11...Re8 (11...a6 12.bc6 bc6 13.Rb1+=) 12.bc6 (12.Be2 Qe6=) 12...bc6= 13.Qa4 Bb7 (13...Nb8 14.Rb1=) 14.Rb1 (14.Be2 Qe6+=) 14...Nf8 (14...Qe6 15.Ba1 Reb8 16.Be2+=) 15.Nb3 (15.Be2 Ne6+=) 15...Qd7 16.Na5 (16.Be2 Ne6+=) 16...Reb8 (16...Rab8 17.Na2+=) 17.Bc1 (17.Nb7 Qb7 18.Be2 Qc7+=) 17...Ne6 18.Be2 Nd8 (18...Qc7 19.Bd2+=) 19.h4 (19.Nb7 Rb7 20.Rb7 Qb7+=) 19...Bc8= 20.Rb4 (20.Bb2 h5=) 20...Qc7 21.h5 Bg4 (21...Nh5 22.Bh5 gh5 23.Rh5=) 22.hg6 (22.Bg4 Ng4 23.Rb8 Rb8 24.hg6 fg6+=) 22...hg6 (22...fg6 23.Ba6=) 23.Bd2 (23.Ba6 Kf8=) 23...Rb4 (23...Be2 24.Ne2 Kf8 25.Nc3=) 24.ab4 Rb8 (24...Be2 25.Ke2 Rb8 26.b5=) 25.0-0 (better is 25.Bg4!? Ng4 26.b5 cb5 27.Qa2+= (27.Nd5?? ba4 28.Nc7 Rb1 29.Ke2 Rh1–+; worse is 27.Nb5 Qd7 28.c6 Nc6–/+)) 25...Be2+= 26.Ne2 Ng4 27.g3 (27.Ng3 f5+=) 27...g5 (27...Qd7 28.f3 ef3 29.Rf3–/+) 28.Rb1 (28.Nc3 Qd7+=) 28...f5 (28...Qe7+=) 29.b5 (29.Ra1!?=) 29...Bf8 (better is 29...Qf7 30.Kg2 Rb5–/+) 30.Rb3?? (better is 30.Kg2 Rb5 31.Nb3–/+) 30...Qh7–+ 31.Kf1 Qh1 (better is 31...Qh3 32.Ke1 Qh1 33.Ng1 Qg1 34.Ke2 Qf2 35.Kd1 cb5 36.Qa2–+) 32.Ng1 Nh2 (32...Nh2 33.Ke2 Qg1–+) 0–1. WoodPusher83 – shoulders, ChessWorld.net, 2007.

6.c4 c6 7.cd5 cd5 8.Nc3 a6=.

6.c4 c6 7.Be2 e4 8.Nd4=+.

6.c4 c6 7.Be2 g6 8.0-0 (8.cd5 Nd5 9.Nc3 Bg7+=) 8...Bg7 (8...e4 9.Nd4=) 9.Nc3 (9.d4 ed4 10.Bd4 dc4 11.Bc4 0-0+=) 9...0-0 (9...e4 10.Nd4=) 10.cd5 cd5 (10...Nd5 11.Nd5 cd5 12.d4=) 11.Re1 (11.Rc1 a5 12.b5 Nb6+=) 11...a6 12.Na4 (12.d3 b5=) 12...b5 13.Nc5 (13.Nc3!?=) 13...Nc5–/+ 14.bc5 e4 (worse is 14...Qc5 15.Be5 Qe7 16.a4+=) 15.Nd4 (15.Ne5 Qc5 16.a4 b4+=) 15...Qc5–/+ 16.Rc1 (16.a4 Bd7+=) 16...Qe7 17.Nc6 Qe6 18.Nd4 Qe7 (18...Qe5 19.f4 Qd6 20.Bc3–/+) 19.Nc6 Qe6 (19...Qd6 20.Be5 Qe6 21.d4+=) 20.Nd4 Qd7 (20...Qe5 21.Qb3–/+) 21.Qb3 Bb7 (21...Qd6 22.Rc6 Qb8 23.Rec1+=) 22.Bc3 (22.d3 Rfc8–/+) 22...Rac8 (22...Rfc8!?–/+) 23.Qb2= Ne8 (23...Bc6 24.Nb3 Ne8 25.Nc5+=) 24.Bb4 (24.a4 Bd4 25.Bd4 Nd6= (worse is 25...ba4 26.Bc5+/–)) 24...Nd6+= 25.Rc5 (25.a4!?+=) 25...Rc5 (25...Nc4 26.Qa1–/+) 26.Bc5 Rc8 27.Bb4 Nc4 28.Qb3 (28.Qb1 h6–/+) 28...Be5 (28...h6 29.Rd1–/+) 29.Rc1 (29.d3 Nb6–/+) 29...Qd6?? (better is 29...Bc7–/+) 30.Bd6+– (30.Bd6 Bd6 31.a4+–) 1–0. PeterRs – shoulders, ChessWorld.net, 2006.

6.c4 e4 7.Nd4=.

6.Be2 a5 7.ba5 Ra5 8.0-0+=.

6.Be2 c6 7.0-0 b5 (7...Qe6 8.Nc3=) 8.d3 (8.a4 ba4 9.Ra4 Qe6=) 8...g6 (8...a5 9.Qd2=) 9.Nbd2 (9.Qd2 Bb7+=) 9...Bg7= 10.h3 (10.c4 0-0+=) 10...0-0 11.Re1 (11.c4 a5=) 11...Ne8 (11...a5 12.c4=) 12.c4 (12.e4 Nc7=) 12...e4 (12...a5 13.Qc2 Nd6 14.c5+=) 13.Nd4 (13.Bg7!? Ng7 14.de4 dc4 15.Qc2=) 13...ed3+= 14.Bd3 bc4 15.Nc6 (better is 15.Bc2!? Qd6 16.Bc3+=) 15...Qd6–/+ 16.Bg7 Kg7 17.Nc4 Qc6 18.Na5 Qd6 (18...Qf6 19.Bb5 Nc7 20.Bc6–/+) 19.Rc1 Ne5 20.Be2 Nf6 21.f4 (21.Qd4 Re8–/+) 21...Ned7 22.Rc6 (22.Bf3 Nb6–+) 22...Qe7–+ 23.Qd4 Kg8 (23...Re8 24.Bf3–/+) 24.Rc7 (24.Bf3 Re8–/+) 24...Qe4 (24...Re8 25.Bf3 Qd8 26.Ra7 Ra7 27.Nc6–+) 25.Qd2 (25.Nc6 a6+=) 25...Re8 (25...Qe6 26.Nc6–/+) 26.Bf3 Qe7 (better is 26...Qe6–/+) 27.Bd5+= Nd5 28.Rd1?? (better is 28.Qd5 Qe4 29.Qe4 Re4 30.Nc4=) 28...Nc7–+ 0–1. DEFFM – GuestLXJF, freechess.org, 2016.

6.Be2 Qe6 7.h3 (7.Nc3 c6=) 7...Ne4 (7...Bd6 8.Nc3+=) 8.d3 Nef6 9.c4 dc4 10.dc4 c5 11.b5 e4 (11...Be7 12.Nc3=) 12.Ng5 (12.Nfd2 Bd6=) 12...Qe7 (better is 12...Qf5 13.h4 h6=) 13.Qc2?? (better is 13.h4=) 13...h6–+ 14.Nf7 Qf7 15.Nc3 Qe6 16.Rd1 Nb6 (better is 16...Be7–+) 17.Qd2? (17.Nd5!? Nfd5 18.cd5–/+) 17...Be7 (17...Nc4!? 18.Qd8 Kf7 19.Bc1–+) 18.Nd5 Nbd5 19.cd5 Qd6 20.0-0 0-0 21.f3 (21.Qc2 Bf5–+ (21...Nd5 22.Rd5 Qg6 23.Re5+/–)) 21...Bf5 22.g4? (22.Bc4–+) 22...Qg3 23.Kh1 Qh3 (23...Bd6 24.Bd3 Qh3 25.Kg1 Ng4 26.fg4 Qg4 27.Qg2 Qg2 28.Kg2 ed3 29.Kg1–+) 24.Kg1 Qg3 (24...ef3 25.Bf3 Ng4 26.Qg2 Qg2 27.Bg2 Ne3 28.d6–+) 25.Kh1 ef3 26.Bf3 Ng4 27.d6 Bg5 28.Bd5 Kh8 29.Rf5 Qh3 30.Kg1 Be3 31.Qe3 (31.Qf2 Rf5 32.Bg7 Kg7 33.Bg2 Bf2 34.Kf1 Bd4 35.Ke2 Qe3) 31...Ne3 (31...Qh2 32.Kf1 Ne3 33.Ke1 Nc2 34.Kf1 Rf5 35.Bf3 Rf3) 32.Bg7 Kg7 33.Rf8 (33.Rd2 Rf5 34.Rg2 Kh8 35.Bf3 Rf3 36.Rf2 Rg8 37.Rg2 Rg2) 33...Rf8 0–1. GuestMHHR – GuestBSGG, freechess.org, 2017.

6.Be2 g6 7.0-0 Bg7 8.d3 (8.d4 e4 9.Ne5 0-0=) 8...0-0 9.Nbd2 b6 (9...Rd8 10.Nb3=) 10.c4 c6 (10...e4 11.Ne1 c6 12.Rc1=) 11.cd5 (11.Rc1 Rd8+=) 11...cd5 (11...Nd5 12.Qc2 Bb7 13.Rae1=) 12.Rc1 (12.Qa4 a6+=) 12...Ne8 (12...a5 13.b5+=) 13.Nb3 (13.Qa4 Bb7+=) 13...Bb7 14.Qd2 Nd6 15.a4 (15.Rc7 Rfc8 16.Rfc1 Rc7 17.Rc7 Rc8 18.Rc8 Bc8=) 15...Rac8 (15...Rfc8 16.Rc8 Rc8 17.Rc1=) 16.Rc8 (16.b5 Rfd8=) 16...Rc8 17.Rc1 Qe8 (17...Qe6 18.Rc8 Bc8 19.Qc3=) 18.Rc8 Qc8 19.Qc1 (19.Bc3 Qc7=) 19...Qc1 20.Bc1 Kf8 (20...e4 21.Ne1=) 21.Kf1 (21.d4 f6=) 21...Bc6 (21...e4!? 22.Nfd4 Ne5 23.de4 de4+=) 22.b5+= Bb7 (22...Nb5 23.ab5 Bb5 24.Nbd2+=) 23.Ba3+/– Ke7 24.d4 (24.Ng5!?+/–) 24...h6= 25.de5 Ne5 26.Ne5 Be5 27.h3 Kd7 28.Ke1 (28.g4 Bg7=) 28...Nc4 (28...Bc3 29.Kf1=) 29.Bc1 (29.Bb4 a6=) 29...f5 (29...a6 30.ba6 Ba6 31.Nd4=) 30.g3 (30.g4 fg4 31.hg4 Bc3 32.Kd1 a6=) 30...h5 (30...Bc3 31.Kd1=) 31.h4 (31.Nd4 a5=) 31...Bc3 32.Kd1 Nb2 (32...Nd6!? 33.Bd2 Ne4=) 33.Bb2+= Bb2 34.Kc2 Bf6 35.f4 (35.Nd4 Kd6=) 35...Kd6 36.Bf3 (36.Nd4 Kc5 37.Nc6 a5=) 36...Bg7 (36...Bc8 37.Nd4=) 37.Kd3 (37.Nd4 Bh8=) 37...Bf6 (37...Bc8 38.Kd2=) 38.Bg2 (38.Kd2 a6=) 38...Bg7 39.Nd4 Bf6 (39...a6 40.Kc2=) 40.Nb3 (40.Bf1 Kc5 41.Kc3 Bg7=) 40...Bg7 (40...a6 41.Bf1=) 41.Nd4 (41.Kd2 Bc8=) 41...Bf6 42.Nb3 (42.Kd2 Kc5 43.Kc3 Bg7=) 42...Bg7 (42...a6 43.Kc2=) 43.Nd4 Bf6 44.Nb3 (44.Bf1 Kc5 45.Kc3 Bg7=) ½–½. Nokarookoff – shoulders, ChessWorld.net, 2006.

6.Be2 g6 7.Nc3 Nb6=.

6.Be2 g6 7.c4 Bg7 8.cd5 Nd5 9.0-0 0-0 10.Qb3 c6 11.Nc3 N7f6 12.Bc4 Be6 1–0. GuestTHRL – GuestBHQK, freechess.org, 2017.

5.c4 c6 6.cd5 cd5 7.Nc3 (7.f4 Nd7+=) 7...Be6 (7...Nf6!?+=) 8.Rc1+/– Bg7 9.Qa4 (9.Nf3 Nc6+/–) 9...Qd7 10.Bb5 (10.Qd7 Nd7 11.Nb5 Ke7+/–) 10...Nc6+= 11.Ne4 de4 12.Rc6 Kf8 (12...bc6? 13.Bc6 Ne7 14.Bd7 Bd7 15.Qa6+–) 13.Ra6 (better is 13.Rc5 Qd6 14.Nh3=) 13…Qd5–/+ ½–½. Rohacek,Miroslav – Kolman,Richard, Bratislava, 2000.

5.c4 c6 6.Nf3 Bg7 7.Nc3 Bf5 8.d3 (8.cd5!? Nf6 9.Bc4+/-) 8...dc4 9.dc4 Na6 10.Qb3 e4? (10...Nf6=) 11.Ng1?? (11.Ne4 Nf6 12.Ng3 Be6+/-) 11...Nc7?? (11...0-0-0!?=+) 12.Nge2 (better 12.Nd5 Bb2 13.Ne7 (13.Qb2?! cd5 14.Qh8 f6 15.Qg8 Kd7 16.Qa8 Qe5 17.Qb7 Qa1 18.Ke2 Qa2 19.Kd1 Qa1 20.Kd2 Qa2 21.Kd1 Qa1 22.Kd2 Qa2 23.Kd1=) 13...Ba1 14.Nf5 gf5 15.Ne2+-) 12...Nf6 13.Ng3 0-0 14.Be2 Rfe8 15.Nf5 gf5 16.0-0 Rad8 17.Rad1 Ne6 18.Rd8 Rd8 19.Rd1 Rd1 20.Bd1 f4 21.Ne2 Bh6?? (better 21...fe3 22.fe3 Ng4=) 22.ef4+- Nf4 23.Qc3 Ne2 24.Be2 Bg7 25.Qg3 Nh5?? (better 25...a6+/-) 26.Bh5+- f5 27.h3 f4 28.Qb3 (better 28.Qg4 e3 29.Bg7 Qg7 30.Qc8 Qf8 31.Qb7 ef2 32.Kf2 Qf6 33.Qa8 Kg7 34.Qa7 Kh6+-) 28...Qg5 29.c5 Kf8 (29...Qd5 30.Qd5 cd5+-) 30.Bg7 (30.Qf7) 30...Kg7 31.Qf7 Kh6 32.Be2 (better 32.Qb7!? Qe5 33.Bd1 e3 34.Qc6 Kg7 35.Qd7 Kf6+-) 32...f3 33.Qf8 Kh5 34.Bf3! ef3 35.Qf3 Kh6 36.Qe3 Qe3 (36...Kg6 37.Qg5 Kg5 38.f3+-) 37.fe3 Kg5 38.Kf2 Kf5 39.Kf3 h5 (39...Ke5 40.e4+-) 40.g3 a6 (40...Ke5 41.e4+-) 41.g4 hg4 42.hg4 Kg5 43.e4 Kf6 44.Kf4 Kg6 45.e5 Kf7 (45...Kg7 46.Kf5 Kf8 47.e6 Ke7 48.g5 b6 49.g6 bc5 50.g7 cb4 51.Ke5 Kd8 52.g8Q Kc7 53.e7 a5 54.Qd8 Kb7 55.e8Q ba3 56.Qa5 a2 57.Qea8) 46.Kf5 (46.Kf5 Kf8 47.e6 Ke7 48.g5 b6 49.g6 bc5 50.g7 Kd6 51.g8Q cb4 52.Qd8 Kc5 53.e7 Kb5 54.e8Q ba3 55.Qd4 a2 56.Qee5 c5 57.Qec5) 1-0. Stanjes - danrad (1625), Rated Blitz game, lichess.org, 2015.

5.c4 c6 6.Nf3 Bg7 7.cd5 cd5 8.Be2 Nc6 9.0-0 a6 10.Qb3 Be6 11.Qa4 Bd7 12.b5 Nd8 (12...Na7 13.Nc3 Nf6 14.d4+/-) 13.Qb4 (13.Rc1 Qe6+=) 13...f6 14.Nc3 Be6 15.Rfc1 a5 16.Qe7 (16.Qa4 b6+/-) 16...Ne7+= 17.d4 Nf7 (17...e4 18.Nd2+=) 18.de5+/- fe5 19.Na4 0-0 (19...g5 20.Rc7+/-) 20.Nc5 Bc8 21.Nb7 Bb7 22.Rc7 Rac8 (22...Rab8 23.Re7 Rfc8 24.Ne5+-) 23.Re7 Rc2 24.Rb1 (worse 24.Rb7 Rb2 25.Re1 e4+=) 24...Re2 25.Rb7 Ng5? (better 25...d4 26.Ra7 Rc8+/-) 26.Ng5 Rff2 27.Rb8 (better 27.Rg7 Kg7 28.Be5 Kh6+-) 27...Bf8 28.Be5 Rg2 29.Kh1 Rg5 30.Bd6 Rf5 31.b6 d4 (31...Ref2 32.b7 Kg7 33.Bf8 Rf8 34.Rf8 Rf8+-) 32.Rf8 Rf8 33.Bf8 d3 (33...Re3 34.Bc5 Re8+-) 34.b7 d2 35.b8Q Re1 36.Kg2 Rb1 37.Qb1 (37.Qb1 Kf8 38.Qd1+-) 1-0. GF87 (2315) - uditkamdar (2270), Rated Classical game, lichess.org, 2016.

5.c4 Nf6 6.Nf3 e4 7.Nd4 dc4 8.Bc4 =.

5.d4 e4 6.Nc3 (6.c4 Nf6=) 6...c6 7.f3 (7.Nge2 Nf6=) 7...f5 (7...ef3 8.Qf3 Nf6 9.Bd3=+) 8.fe4 fe4 9.Nge2 Bh6 (9...Nf6 10.Nf4=+) 10.Nf4= Qf6 (10...Nf6 11.Be2=) 11.Nce2=+ g5 (11...Bg4 12.Qd2=) 12.Nh5= Qf7 13.Neg3 Nf6 (13...Ne7 14.Be2 Rf8 15.Rf1=) 14.Be2+= Bg4?? (better is 14...Nfd7+=) 15.Nf6+– Qf6 16.Bg4 Rf8 (16...0-0 17.Nf5+–) 17.Rf1 Qd6 (17...Qh8 18.Nf5 Rf6 19.c4+–) 18.Bh5 (18.Nf5 Qh2 19.Bh3 Rf5 20.Qh5 Kd8 21.Rf5 Qd6+–) 18...Kd7 (18...Kd8 19.Nf5 Qe6 20.Bg4+–) 19.Qg4 (better is 19.Rf8 Bf8 20.Qg4 Kc7 21.c4+–) 19...Ke7 (19...Kd8+–) 20.Nf5 (better is 20.Rf8 Bf8 21.Nf5 Kd8 22.Nd6 Bd6 23.Qg5 Kc7 24.Qg7 Nd7+–) 20...Rf5 21.Qf5 Nd7 22.Qf7 Kd8 23.Qe8 (23...Kc7 24.Qa8 Qh2 25.Be2+–) 1–0. mwojo (1745) – pauldopson, net–chess.com, 2004.

5.Nf3 Bg7 6.c4 dc4 7.Bc4 Bg4 8.Nc3 +=.

5.Nf3 Bg7 6.c4 c6 7.cd5 cd5 8.Nc3 Nf6 (8...Qd8 9.Rc1 Nc6 10.d4+=) 9.Qb3 Be6 10.Ne5 (10.Qa4 Bd7 11.Nb5 0-0 12.Ne5 Ne4 13.Nd7 Bb2 14.Nf8 Ba1 15.Nh7 Kh7–/+) 10...d4= 11.Qa4 Nbd7 (better is 11...Nfd7!? 12.Nd7 Bd7=) 12.ed4+/– 0-0 13.Qb5 (13.Be2 Rfd8+/–) 13...Ne5 (13...Ng4!? 14.Qb7 Nge5 15.de5 Be5+/–) 14.de5+– (14.Qe5?! Ng4 15.Qc5 Qh4=) 14...Bd7 (14...Ng4 15.d4+–) 15.Qc5 (15.Qb7?! Qe5 16.Be2 a5+/–) 15...Rfc8?? (15...Qe8 16.d4 Bc6+–) 16.Qe7 (16...Re8 17.Qd6+–) 1–0. MrkT – caissa100, internet, 2005.

5.Nf3 Bg7 6.d4 e4 7.Nfd2 a5 (7...Nf6 8.Be2=) 8.c4 ab4 (8...Nf6=) 9.Nb3 (9.cd5!? Nf6 10.Qb3=) 9...c6 (9...Nf6 10.cd5 Nd5 11.Qc2–/+) 10.cd5= cd5 11.Bb5 (11.Qc2 Kd8+=) 11...Bd7+= 12.a4 (12.Qe2 ba3 13.Ba3 Qd8+=) 12...Bb5 13.ab5 Ra1 14.Ba1 Nd7 (14...Nf6 15.0-0+=) 15.0-0 Ngf6 16.N1d2 (16.f3 0-0+=) 16...0-0–/+ 17.Na5 (17.Qb1 Ra8–/+) 17...Nb6 18.Qb3? (18.Ndb3 Nc4–+) 18...Rc8 (18...Ra8 19.Qa2–+) 19.Rb1? (better is 19.Bb2–/+) 19...Rc3?? (better is 19...Ra8 20.Qa2 Nc4 21.Ndc4 dc4–+) 20.Bc3+– bc3 21.Qc3 h6 (21...Qd7 22.Ra1+–) 22.Qb4 (22.Qc5 Qe6+–) 22...Qc7? (22...Qd7 23.Ra1+–) 23.Nab3 (better is 23.Qc5 Ne8 24.Rc1+–) 23...Bf8 24.Qa5 Nfd7 25.Rc1 Qb8 26.Nc5 Nc4?? (better is 26...Bd6 27.h3 Bh2 28.Kh1 Bd6+–) 27.Nc4 (better is 27.Nd7 Na5 28.Nb8 Bb4+–) 27...Nc5 28.Qa2?? (28.dc5 dc4 29.Rc4 Bc5 30.Rc5+–) 28...Nd3–/+ 29.Rc2 (29.Rf1 dc4 30.Qc4 Bd6–/+) 29...dc4 (29...Nb4 30.Qb3 A) 30...dc4?! 31.Rc4 Qd8 32.Qc3+= (32.Rb4? Qa5–+); B) 30...Nc2 31.Qc2 dc4 32.Qc4 Bd6–+) 30.Qc4–/+ Qa7 (30...Bd6!?–/+) 31.Ra2= Qb6 (31...Qb8 32.Rc2 Bd6–/+) 32.d5 (better is 32.f3!?+=) 32...Bc5 (better is 32...Qc5 33.Ra4 f5+=) 33.Qc3? (33.Qe4 Qb5 34.Ra1 Bd6+=) 33...Qd8 (33...Qb5 34.Ra1–+) 34.Qb3? (34.Qc4 f5–/+) 34...b6 (better is 34...Nc1!? 35.Qc2 Na2 36.Qc5 Qa5–+) 35.Rd2 (35.Qc4 Qh4–/+) 35...Qa8 (35...Bd6 36.Rd3 ed3 37.Qd3–/+) 36.Ra2 Qd8 37.Ra7 (37.Rd2 Bd6 38.Rd3 ed3 39.Qd3–/+) 37...Qd6 (37...Qh4 38.Ra8 Kh7 39.Qa2–/+) 38.Ra8 Kh7 (38...Kg7 39.Qa2–/+) 39.Qc3+= Ne5 40.f4? (better is 40.Qb3!?–/+) 40...ef3 (40...Qd5 41.Ra1 Ng4 42.Kh1–+) 41.gf3? (41.Re8 f6 42.Qd2 fg2 43.Kg2 Nc4–+) 41...Nf3 (41...Qd5 42.Rd8 Nf3 43.Kf2 Qd8 44.Kf3 Qd5 45.Kf2 Qa2 46.Kf3 Qh2 47.Qd3 Qh3 48.Ke2 Qe3 49.Qe3 Be3 50.Kf3–+) 42.Kf1? (42.Kg2 Ne5 43.e4 Qf6–+) 42...Qe5?? (better is 42...Ne5 43.Qd2 Nc4–+) 43.Qe5–/+ Ne5 44.e4 (44.Ra4 f5–+ (44...Be3 45.Re4+/–)) 44...h5 0–1. gtate (1980) – somporn (2140), net–chess.com, 2005.

5.f4 Nd7 +=.

5.b5+= Nb8 (5...e4 6.bc6 ef3 7.cb7 Bb7 8.gf3+=) 6.Be5+/– f6 (6...Bg4 7.d4+/–) 7.Bb2 (7.Bg3 Bg4+/–) 7...Nd7 (7...Qd7 8.e3+/–) 8.e3 b6 (8...Nc5 9.Nc3 Be6 10.Be2+/–) 9.d4 g5 (9...Qe6 10.c4!+–) 10.Be2 (10.c4 dc4 11.Bc4 a6+–) 10...g4 (10...a6 11.c4 g4 12.Nfd2 dc4 13.Bc4+–) 11.Nh4 f5 (11...Nh6 12.Bg4 Ng4 13.Qg4+–) 12.Nf5 Qf6 (12...Qg5 13.e4+–) 13.Bg4 Bb7 (13...Ne7 14.Qf3 c6 15.Ne7 Be7 16.c4+–) 14.Bh5 (14.Nc3 0-0-0+–) 14...Kd8 15.Qg4 (15.Qf3 c6+–) 15...Nh6 (15...a6 16.Nc3+–) 16.Nh6 Qh6 17.Nc3 (17.Bf7!? a6 18.Be6 Nf6+–) 17...Nf6 18.Qh3?? (better is 18.Qh4 Be7 19.g4+–) 18...Nh5= 19.0-0-0 (19.g4 Nf6 20.Qh6 Bh6=) 19...Bc8 (19...Qg6 20.e4+=) 20.g4 (better is 20.Qf3 Bb7 21.Nd5+=) 20...Bd6?? (better is 20...Nf6 21.Qh6 Bh6=) 21.Qh5 (better is 21.Qh4 Be7 22.Qh5 Qh5 23.gh5+–) 21...Qf6?? (21...Qh5 22.gh5 Bg4+–) 22.Nd5 Qf3 (22...Qf2 23.Qg5 Ke8 24.Nf6 Kf8 25.Rdf1+–) 23.Qg5 Kd7 (23...Ke8 24.c4 a6+–) 24.Qg7 Ke6 25.Nc7 1–0. tightfist – mleek, net–chess.com, 2006.

5.b5+= Nd4 6.Nd4 ed4 7.Bd4 b6 (7...Nh6!?+=) 8.e3+/– Bb7 9.Be2 0-0-0 (9...Nh6 10.0-0+/–) 10.0-0+– Nf6 11.d3 g6 (11...Qd7 12.a4+–) 12.Bg4 (12.a4 Bg7+–) 12...Kb8 13.Qf3 (13.a4 h5 14.Bf3 Bg7+–) 13...Bg7+/– 14.Nc3 h5 15.Bh3 g5 16.Bf5 g4 17.Qd1 (17.Qf4 Ne8 18.Ne2 f6+/–) 17...c5?? (17...Ne8 18.Ne2 Bd4 19.Nd4 Qe5=) 18.bc6+– Bc6 19.a4 (19.Ne2+–) 19...Bd7?? (19...Ne8 20.Ne2 Qg5+/–) 20.Bd7+– Qd7 21.Nb5 (21.a5 Ne8+–) 21...Rhg8 (21...Rhe8 22.Qb1+–) 22.Na3 (22.Rb1 Qe6+–) 22...Ne8 (22...Qa4 23.Qb1 Qc6 24.Nb5+–) 23.Bg7 Rg7 24.d4 (24.a5 h4+–) 24...Rg6 (24...Qa4 25.Qd3+/–) 25.Qd3 Rf6 (25...Qa4 26.c4+–) 26.a5 Qf5 27.Qf5 (27.Qc3!? Rc8 28.Qb4 h4 29.ab6 Rb6+–) 27...Rf5 28.ab6 Rd7 (28...ab6!? 29.Rfb1 Rf6+–) 29.ba7 Ra7 30.c4 f6 31.Rfb1 Rb7 32.Rb7 Kb7 33.c5 Rg5 34.Nb5 Kc6 35.Na7 Kd7 (35...Kb7 36.Kf1+–) 36.Ra6 Rg7 37.Nb5 f5 (37...Kd8 38.Ra8 Kd7 39.e4 de4 40.d5+–) 38.Ra7 (38.c6 Kd8 39.Ra8 Ke7 40.c7 Nc7 41.Nc7+–) 38...Kc6 39.Rg7 Ng7 40.Nd6 Kd7 41.g3 Ne6 (41...Kc6+–) 42.Nf5 Kc6 (42...Ke8 43.h3 gh3 44.f4+–) 43.Kg2 (43.Ne7 Kd7 44.Nd5 Ng5+–) 43...Nc5 (43...Kd7 44.h3+–) 44.Ng7 (44.dc5!? Kc5 45.Ng7 d4 46.ed4 Kd4 47.Nh5 Ke5+–) 44...Nd3 (44...Ne4 45.Nh5 Kd6 46.f3 gf3 47.Kf3 Nd2 48.Kf4+–) 45.Kf1 (45.Nh5 Ne1 46.Kg1 Nf3 47.Kh1 Kd6+–) 45...Kd6 46.Nh5 Ke6 (46...Ke7 47.Nf4 Nb4+–) 47.Nf4 Nf4 48.gf4 Kf5 49.Kg2 Ke4 50.Kg3 Kd3 51.f5 Ke2 52.f6 (52...Kf1 53.f7+–) 1–0. Trkn – Thompson, itsyourturn.com, 2000.

5.b5+= e4 6.bc6 ef3 7.cb7 Bb7 8.gf3 +=.

5.e3 e4 6.Nd4 Ne5 7.Nf5 Bf5 8.f4 Bg4 9.Be2 Qh4 10.Kf1 Be2 11.Qe2 0-0-0 12.Be5 Nh6 13.Nc3 Ng4 14.g3 1-0. 0203 – DMKA, Rated Classical game, lichess.org, 2014.

5.e3 a5 6.b5 (6.ed4 ed4 7.Qe2 ab4 8.ab4 Ra1 9.Ba1 Be6 10.Nd4 Qb4 11.Qb5 Qb5 12.Bb5 Bd7+=) 6...de3= 7.de3 Nd7 8.Be2 f6 9.0-0 Nh6 10.c4 Qc5 (10...Nc5 11.Nc3+=) 11.a4 Bd6 12.Nc3 0-0 (12...Qa7!?+=) 13.Ba3+/- Qb6 (better 13...Qa7!? 14.Bd6 cd6 15.Qd6 Nf7+/-) 14.Nd5+- Qa7 15.Bd6 (better 15.b6!? Qb8 16.bc7 Bc7 17.Bf8 Nf8+-) 15...cd6 16.Nc7 Kh8? (better 16...Rb8+/-) 17.Na8+- Qa8 18.Qd6 Rd8 (18...b6 19.Rfd1 Qb7 20.Qc6+-) 19.Rfd1 b6 (19...Re8 20.Qc7+-) 20.Qc6 (20.Qe7!? Rf8 21.Rd7 Bd7 22.Qd7 Rd8+-) 20...Bb7 (20...Qb8 21.Qe6+-) 21.Qc7 (21.Rd7 Bc6 22.bc6 Rc8+=) 21...Rg8 (21...Qc8 22.Qc8 Bc8+-) 22.Rd7 Bc8 23.Rd8 1-0. BeepBeepImAJeep (2770) - jerryfly (1965), lichess.org, 2015.

5.e3 de3 6.de3 f6 7.Nc3 Bg4 8.Nd5 Qd6 9.c4 e4 10.c5 Qd7 11.Bc4 ef3 12.gf3 Be6 13.e4 c6 14.Nc7 Qc7 15.Be6 Na6 16.Qb3 Ne7 17.Rd1 Rd8 18.Bf7 1-0. rasgecko (1605) - palobiely (1735), Rated Classical game, lichess.org.

5.e3 de3 6.de3 f6 7.Bc4 Be6 8.Be6 (8.Qe2 Nd7=) 8...Qe6 9.0-0 (9.Nc3 Nd7=) 9...Qd6 (9...Nc6 10.e4+=) 10.Qe2 (10.c4 Qe6 11.Nbd2 Nc6+=) 10...Nh6 (10...Nd7 11.Rd1 Qe6 12.e4+–) 11.Rd1 Qe6 12.Qb5 (12.e4 Nd7+–) 12...Qc6+= 13.Nc3 Bd6 (13...Qb5 14.Nb5 Na6 15.Nc3+=) 14.Qd3 g6 (14...Nf7 15.Nd5+–) 15.b5 (15.Nd5 Nd7 16.b5+–) 15...Qc5?? (better 15...Qd7+–) 16.Na4+– Nd7 17.Nc5 Nc5 18.Qd5 (18.Qc4 a6+–) 18...Rb8 (18...0-0-0 19.Qc4+–) 19.a4 Nf5 20.a5 (20.Ba3 Ne7 21.Qc4 b6+–) 20...Ne7 (20...Ng7 21.Ba3 Nge6 22.b6 ab6 23.ab6+–) 21.Qc4 Nd7 (21...b6 22.Ba3+–) 22.Qe6 (better 22.Ba3 Nc8+–) 22...Nf8 (22...Rf8 23.Ba3 Rc8 24.Rd2+–) 23.Qf6 Rg8 24.Ng5 Nd7 25.Qf7 Kd8 26.Ne6 (26.Ba3 h6 27.Bd6 Kc8 28.Be7 b6 29.Qg8 Kb7 30.a6 Ka8 31.Qd5 c6 32.Qc6 Rb7 33.Qb7) 26...Kc8 27.Rd6! cd6 (27...cd6 28.Qe7 Double attack (28.Qe7 Decoy; 28.Qe7 Remove defender)) 28.Qe7 b6 29.Qd6 Re8 (29...Rb7 30.a6 Nb8 31.ab7 Kb7 32.Qc7 Ka8 33.Ra7) 30.Qc7 (30.Qc6) 1–0. DEFFM – GuestMVJW, freechess.org, 2018.

5.e3 Bg4 6.Be2 Nf6 7.0-0 Bf3 8.Bf3 e4 9.ed4! ef3 10.Re1 Ne4 11.Qf3 Qf6 12.Re4?? (12.Qf6) 12...Be7 13.Rf4 Qg6 14.d3 0-0 15.Nd2 Bd6 16.Rg4 Qh6 17.h3?? Qd2 18.Rg7? Kg7 19.d5 f6 20.Bc1?? Qe1!! 0–1. mtr – ChiefWahoo2, internet, 2001.

5.e3 Bg4 6.Be2 h6 7.0-0 g5? (7...de3 8.Ne5 ef2 9.Rf2 Be6+–) 8.ed4 Bf3 (better is 8...e4 9.Ne5 Be6+–) 9.Bf3 (9.gf3?! f6+/–) 9...c6 10.Re1 Qd6 (10...Bg7 11.de5 Nd7 12.b5+–) 11.de5 (11.Re5?! Kd8+–) 11...Qc7 12.e6 (12.Bh5!? Kd8+–) 12...f6 13.d4 Na6 (13...Bd6 14.g3+–) 14.d5 (14.Bh5!? Ke7+–) 14...0-0-0 15.c4 cd5 16.cd5 Qc4 (16...Bd6 17.Nd2 Kb8 18.Rc1+–) 17.Nd2 Qf4 18.Rc1 Kb8 19.e7! Ka8 (19...Be7 20.g3 Combination; 19...Ne7 20.g3 Combination) 20.ed8Q (20.ed8Q Nb8 21.Qf8+–) 1–0. Fournier,Frederic – tepartoelpeon, Active, 2008.

5.d4 e4 6.Ne5 =+.

5.e3 e4 6.Nd4 Ne5 7.Ne2 Nf6 8.d4 Nc4 9.Bc3 Bd7 10.Nd2 Nd6 11.Nb3 b6 12.Bb2 Qd8 13.Ng3 h6 (13...h5 14.Ba6=+) 14.Be2 h5 15.0-0 (15.Nh5? Nh5 16.Bh5 Qg5-+) 15...h4 16.Nh1 Nc4 17.Bc4 dc4 18.Nd2 h3 19.g3 (19.Nc4?? hg2 20.Kg2 Bb5-+) 19...Be6 20.c3 Qd5 (20...c5 21.bc5 bc5 22.f3 ef3 23.e4=) 21.f4 (21.f3!?=) 21...Bg4 22.Qe1 Qd7 (22...0-0-0 23.Nf2 Be6 24.Qb1=+) 23.Qf2 (better 23.Nc4!? Qf5 24.Ne5+/-) 23...b5 24.Qe1 Qd5 25.Nf2 Bf5 26.Qe2 Be7 27.Rfd1 (27.g4 Bh7=) 27...0-0 (better 27...Bc8=) 28.Qf1 (better 28.g4 Bg6 29.a4+=) 28...Ng4-/+ 29.Ng4 Bg4 30.Qf2? (better 30.Re1-/+) 30...Bd1-+ 31.Rd1 Rfd8 32.Qf1 Qe6 (32...Qf5 33.Ra1-+) 33.Qf2? (better 33.f5!? Qh6 34.Ne4 Qe3 35.Nf2-/+) 33...Qf5 34.Qf1 a5 35.Qf2 a4 (35...c6!? 36.Qe2-+) 36.Qf1 Rd5 37.Qe2 Ra6 38.Qf1 Rg6 39.Qf2 Rd8 40.Qf1 Kh7 41.Qf2 c6 42.Nf1 Qh5 (42...c5 43.bc5 Bc5 44.Rd2-+) 43.Rd2 (43.Rc1 Rgd6-+) 43...Bd6 (43...Rgd6 44.Re2-+) 44.Qe2 (44.Re2 Qf5-+) 44...Qd5 45.Qf2 Bc7 46.Qe2 Rh6 47.Qf2 Kg8 48.Qe2 f5 49.Qf2 Rf6 50.Qe2 g6 51.Qf2 Kg7 52.Qe2 Qd7 53.Qf2 Re8 54.Qe2 Rd6 55.Qf2 Qf7 56.Qe2 Qg8 57.Qf2 Rd5 58.Qe2 Qe6 59.Qf2 (59.Rd1 Red8-+) 59...Qe7 (better 59...Bd6-+) 60.Qg2?? (better 60.Rd1-+) 60...hg2 61.Kg2 g5 62.h3 gf4 63.gf4 Qh4 64.Ng3 Kf6 65.Rf2 Rg8 66.Rf3 (66.Bc1 Qg3 67.Kf1 Qg1 68.Ke2 Qc1 69.Rf1 Rg2 70.Rf2 Qc2 71.Ke1 Qf2 72.Kd1 Qd2) 66...ef3 67.Kf3 Qg3 (67...Qg3 68.Ke2 Qh2 69.Kf3 Qg2) 0-1. tonyclifton (1635) - Bakka (2085), Rated Bullet game, lichess.org, 2015.

5.e3 Ngf6 6.Be2 Qe6 7.Nc3 c6 8.Ng5 (8.0-0 Bd6=) 8...Qf5=+ 9.Nf3 Bd6 10.0-0 0-0 11.d3 Re8 12.Re1 Qe6 13.Qd2 a5 14.b5 e4 (14...Nb6 15.Reb1=+) 15.bc6= bc6 16.Nd4 Qe5 17.g3 Bb7 18.de4 de4 (< 18...Ne4 19.Ne4 Qe4 20.Bd3+/–) 19.Rab1 Qg5 20.Ndb5 Be5 21.Nd6 Bd6 22.Qd6 Ne5 23.Qc7 (23.Na4 Rad8 24.Qc7 Rd7–/+) 23...Ba6=+ 24.Ne4 Ne4 25.f4 Qg6 26.Be5 Ng3 27.Ba6 Ne4 28.Kf1 Ra6 29.Rb8 Ra8 30.Ra8 Ra8 31.Rd1 h6 32.Rd8 Rd8 33.Qd8 Kh7 34.Qa5 (34.Qd7 Qh5 35.Kg1 f6–/+) 34...Qh5 35.Ke1 Qf3 36.Bd4 c5 37.Bc5 Qf2 38.Kd1 Qf1 39.Qe1 Qf3 40.Kc1 Nc5 41.Kb2 g5 42.fg5 hg5 43.Qd2 f5 44.Qd4 Qb7 45.Qb4 Qe7 46.Qd4 Kg6 47.Ka2 (47.h3 Qb7 48.Ka2 Ne4–+) 47...Ne4 48.Qb6 Kh5 49.Qd4 Qc7 50.Kb3 (50.Kb2 Kg4–+) 50...Kg4 51.Qd1 Kh4 52.Qd4 Kh3 53.Qh8 Kg2 54.Qd4 g4 (< 54...Kh2 55.c4 g4 56.Qb2 Kg3 57.Qe2–+) 55.c4 Kh2 56.Qb2 Kg3 57.Qd4 0–1. mtrh – NN, internet, 2002.

5.Nd4 a5 6.b5 c5 7.Nb3 b6 8.e3 Nf6 9.Bf6 (9.Be2!?+=) 9...Qf6–/+ (9...gf6?! 10.d4 c4 11.N3d2=) 10.Nc3 Be6 11.Be2 Nd7 12.Bg4 Ne5 13.Be6 fe6 14.0-0 Qg6 15.Kh1 Bd6 16.Ne2 (16.Na4!?–/+) 16...Ng4–+ 17.h3 Qh6 (better is 17...a4!? 18.Nf4 Bf4 19.ef4 ab3 20.Qg4 Qg4 (worse is 20...bc2 21.Qg6 hg6 22.Rfc1–/+) 21.hg4 bc2–+) 18.Nf4 Ne5 19.Qh5 Kd7 (19...Qh5 20.Nh5 a4 21.Nc1–/+) 20.d4 (20.Qh6 gh6 21.d4 ed3 22.Nd3 Nc4+=) 20...ed3 (20...Qh5 21.Nh5 cd4 22.Nd4–/+) 21.Qh6+= gh6 22.Nd3 Rhg8 23.Nd2 Raf8 Black intends c4 24.f4 Ng6 25.Nf3 Ne7 (25...c4 26.Nb2=) 26.g4 Ng6 27.Rf2 c4 28.Nde1 Bc5 29.Re2 a4 30.c3 Kd6 (30...h5 31.gh5 Ne7 32.Ne5 Kc7 33.Kh2–/+) 31.Nc2 Rg7 32.Ncd4 e5 (better is 32...Ne7!?=) 33.Nf5+/– Kc7?? (better is 33...Rf5 34.gf5 e4 35.fg6 ef3 36.gh7 Rh7+/–) 34.Ng7+– Kd7 35.f5 Bd6 (35...e4 36.Ne1 Ne5 37.Ne6+–) 36.Nh5 (36.Rd1 e4 37.Rd5 ef3+–) 36...Ne7 (36...e4 37.Nd4+–) 37.e4 de4 38.Re4 Rc8 (38...Nd5 39.Ne5 Be5 40.Rd1+–) 39.Ne5 Ke8 (39...Be5 40.Rd1 Bd6 41.Re6+–) 40.Nf6 Kf8 41.Ned7 (41.Nfd7!? Kg8 42.Nc4 Bc5 43.Ncb6 Bb6 44.Nb6 Nf5 45.gf5 Rc5+–) 41...Kg7 42.Nb6 Rc5 (42...Kf6 43.Re6 Kg5 44.Rd6 Rb8+–) 43.Ne8 (43.Ne8 Kh8 44.Nd6+–) 1–0. mikebaldini – rookingfish (1795), gameknot.com, 2016.

5.Nd4 a5 6.b5 c5 7.bc6 bc6 8.e3 Qb7 9.Qc1 Na6 10.a4 (10.Nc3 Rb8 11.Rb1 Qc7=) 10...Bd7 11.Be2 (11.Nb3 Qb6=) 11...Nf6 (11...Rb8 12.Ba3+=) 12.0-0 (12.Nb3 Qc7=) 12...Be7 13.f3 (13.Nc3 c5 14.Ndb5 0-0=) 13...0-0 (13...Rb8 14.Bc3 Nb4 15.Na3+=) 14.fe4 Ne4 15.Nc3 Nac5 16.Ne4 Ne4 17.d3 Nd6 (17...Rab8 18.Ba3 Ba3 19.Ra3=) 18.Bc3 Qc7 19.Qd2 Exerts pressure on the isolated pawn 19...Rfe8 20.Bf3 Bg5 21.Rae1 Qd8 (21...Re7 22.Rf2=) 22.Qf2 Bh4 23.g3 Bf6 24.Bg2 Be5 (24...Rb8 25.Qd2=) 25.Ba1 (25.Rb1 Qf6=) 25...Qf6 26.Qd2 Qg6 (26...Qh6 27.Bc3=) 27.e4 (27.Nb3 Ba1 28.Ra1 Nb7=) 27...de4+= 28.Be4 (28.de4 Nc4 29.Qd3 c5 30.Qc4 cd4 31.Bd4 Rac8=) 28...Ne4 29.Re4 c5 (29...f5 30.Re2+=) 30.Ne2 (30.Nb5!? Ba1 31.Re8 Re8 32.Ra1–/+) 30...Ba1–/+ 31.Re8 (31.Ra1 Re4 32.de4 Bc6–/+) 31...Re8 32.Ra1 Qg4 33.Re1 Qa4 34.c3 Qc6 35.Nf4 (35.Rf1 Bc8 36.Nf4 Bb7–+) 35...a4 (35...Re1 36.Qe1 g5 37.Ng2–+) 36.Re8 Be8 37.c4 (37.d4 cd4 38.cd4 a3–+) 37...Qf6 (37...a3 38.Qa2 Qa4 39.Kf2–+) 38.Nd5 (38.Qe3 Qd4 39.Qd4 cd4–+) 38...Qe5 (38...Qd4!? 39.Qf2–+) 39.Qa5–/+ Qd4 40.Kg2 Qd3 41.Qd8? (better is 41.Qc5 h6 42.Nf4 Qd2 43.Kg1 Qc1 44.Kf2–+) 41...Qe2 42.Kg1 a3 43.Nc3 Qe1 44.Kg2 h6 45.h4 (45.Na2–+) 45...Kh7 (better is 45...Qc3 46.Qe8 Kh7 47.Qe4 g6–+) 46.Qd3 g6 47.h5 (47.Qf3–+) 47...Bc6 48.Nd5 a2 49.Qf3 a1Q 50.Qf7 Qg7 51.hg6 Kh8 (51...Kh8 52.Qg7 Kg7–+) 0–1. Saradjen,Janko (2215) – Orel,Oskar (2270), SLO–ch Skofja Loka, 2000.

5.Nd4 a5 6.b5 Nd7 7.e3 Nc5 8.c4 (8.Nc3 Qg5=) 8...dc4 9.Bc4 Qg5 10.Kf1 a4 11.h4 Qg6 12.h5 Qg5 13.f4 Qe7 14.Nc3 Nf6 15.Rh4 h6 16.Qb1 Bd7 17.Qc2 c6 (17...Rg8 18.Rc1=) 18.Kg1 (18.bc6 Bc6 19.Nc6 bc6=) 18...cb5 19.Bb5 (19.Ncb5 Rc8 20.Na7 Rd8=) 19...Bb5=+ 20.Ncb5 Qd7 21.Qc3 (21.Rc1 Be7–/+) 21...Be7 22.Rb1 (22.Qc2 0-0–/+) 22...0-0–+ 23.Qc2 Ng4 24.Rh3 Rfc8 25.Rf1 White plans f5 25...Nd3 26.Qb1 Ra6 27.f5 (27.Ba1 Rb6 28.Bc3 Rc5–+) 27...Nge5 28.Bc3 Rc5 29.Rg3 (29.f6 Bf6 30.Qc2 Ra5–+) 29...Bf6 (29...Rb6 30.Qc2 Rcb5 31.Nb5 Qb5 32.Qa2–+) 30.Qa2 (30.Rf4 Nf4 31.ef4 Nd3–+) 30...Rb5 31.Nb5 Qb5 32.Rb1 (32.Bd4 Qc6 33.Kh1 b5–+) 32...Qd7 33.Rf1 b5 0–1. DEFFM – GuestQTKX, freechess.org, 2018.

5.Nd4 c5 6.bc5 Qc5 7.e3 Nc6 8.Nc6 bc6 9.d4 Qb6 10.Bc3 Nf6 11.f3 a5 12.fe4 Ne4 13.Bd3 Nc3 14.Nc3 Qb2 15.Na4 Qb7 16.0-0 Bd6 17.Qf3 0-0 18.Rab1 Qc7 19.g3 Bh3 20.Rf2 Rab8 21.Re1 Ba3 22.Qh5 g6 23.Qh3 Be7 24.Rf4 Rb4 25.Nc5 Bc5 26.dc5 Rf4 27.ef4 a4 28.Ra1 Qa5 29.Qg4 Qc5 30.Kg2 f5 31.Qe2 Qd6 32.Ra4 d4 33.Bc4 Kh8 34.Qe5 Qe5 35.fe5 c5 36.Bd5 1-0. CONCEntrado – GaldinoSF, Rated Classical game, lichess.org.

5.Nd4 c5 6.bc5 Qc5 7.e3 Bd7 8.Nb3 Qe7 9.Nc3 Nf6 10.Nb5 Qd8 11.Be5 a6?? (better 11...Na6+=) 12.Nc7+– (12.Nc7 Ke7 13.Na5+–) 1–0. Pierre – Zarah, internet, 2020.

5.Nd4 c6 6.e3 g6?? (better is 6...Nf6=) 7.Nc6!!+– bc6 (7...Nc6 8.Bh8) 8.Bh8 f6 9.c4 Bh6? (better is 9...Nh6 10.cd5 Nf7 11.dc6 Nh8+–) 10.cd5 cd5 11.Nc3 Bb7 12.Rc1 Qf8 (12...Kf8+–) 13.Nd5! Bd5 14.Rc8 Kf7 15.Rf8 Bf8 16.f3 Nh6 17.Qc1 Nd7 18.Bc4 Bc4 (18...Ke6 19.fe4 Bc4 20.Qc4 Ke7+–) 19.Qc4 Ke7 20.Qe4 Ne5 21.Qa8 Nef7 22.Qb7 Kd6 23.Ke2 (23.Bf6!? Ke6 24.Bd4 Bd6+–) 23...Nh8 24.Rc1 (24...Ke6 25.Rc6 Bd6 26.Qc8 Ke7 27.Ra6+–) 1–0. marekt (2510) – greengrass, ChessWorld.net, 2003.

5.Nd4 Nc6 6.Nc6 bc6 7.e3 Nf6 8.c4 Be6 (8...a5 9.Qc2 Qd8 10.b5 cb5 11.cd5+=) 9.c5 g6 (9...a5 10.Qa4 Bd7 11.Be2+=) 10.d3 Bg7 11.Nd2 ed3 12.Bd3 0-0 13.0-0 Rfd8 (13...a5 14.Nb3 Rfb8 15.Qd2+=) 14.Nf3 Ne4 (14...a5 15.Nd4 Bd7 16.Qf3+=) 15.Bd4 (15.Bg7 Kg7 16.Qa4 Bd7+/-) 15...Bd4 (15...Bg4!? 16.Bg7 Kg7=) 16.Nd4+/- f5?? (better 16...Bd7+/-) 17.Nc6+- Qf7 18.Nd8 Rd8 19.Qc2 Ng5 20.Rfd1 Re8 21.a4 (21.Qa4 Ra8+-) 21...Qg7 (21...f4 22.ef4 Qf4 23.b5+-) 22.b5 Qh6 (22...Qf6 23.Qd2 Qe7 24.Rac1+-) 23.a5 Qh4 24.Qa4 (24.Ra4 Qh6+-) 24...Qg4 (24...Ne4 25.Be4 fe4 26.b6+-) 25.Qg4 fg4 26.b6 ab6 27.ab6 cb6 28.cb6 Rb8 29.Rdb1 Bc8 30.Ra7 White prepares the advance b7 30...Ne4 (30...Bb7 31.Rc1 Ne6 32.Rc7+-) 31.Be4 de4 32.b7 Bf5 (32...Bb7 33.Rbb7 Rb7 34.Rb7 h5+-) 33.Ra8 (33.Ra8 Kg7 34.Rb8 Kh6 35.Rh8 Bd7 36.b8Q Be8 37.Qf4 g5 38.Qf8 Kg6 39.Rb6 Bc6 40.Rc6 Kh5 41.Rh7) 1-0. dannysmet (2040) - okotieno (2025), Rated Blitz game, lichess.org, 2020.

5.Nd4 Nc6 6.e3 Nd4 7.Bd4 Nh6 8.d3 Nf5 9.Bb2 Be6 10.Nd2 0-0-0 11.Be2 Qg5 12.0-0 Bd6 13.de4 Nh4 (better 13...de4 14.Qe1 Nh4=) 14.g3+/- Bh3? (better 14...de4 15.Ne4 Qg6+/-) 15.f4+- Bf4? (15...Qg6 16.Bh5 Qe6 17.ed5 Qe3 18.Rf2+-) 16.ef4 Qg6 17.Rf2 (better 17.ed5 Rd5 18.c4+-) 17...de4+/- 18.Qe1 (better 18.Bh5!? Qb6 19.Bg4 (19.gh4?! e3 20.Bg4 Kb8 21.Bh3 ef2 22.Kf1 Rhe8=) 19...Bg4 20.Qg4 f5 21.Nc4 Qf2 22.Kf2 fg4 23.gh4+/-) 18...e3=+ 19.Bd3 (better 19.Bg4! Qg4 20.Qe3=+) 19...ef2-/+ (19...ed2?! 20.Qd2 Bf5 21.Qe3=) 20.Qf2 Qg4 (20...Bf5 21.Nc4 Rhe8 22.Qa7 Bd3 23.cd3-+) 21.Ne4 (better 21.Qa7 Rd3 22.cd3=) 21...f5?? (21...Nf3 22.Kh1 f5-+) 22.Nc5?? (better 22.Be2 Qg6 23.Ng5+=) 22...Nf3 (22...Rhe8 23.Rc1 Rd3 24.Nd3 Re2-+) 23.Kh1-/+ Rhe8 24.Be5?? (24.Be2 Rd2 A) 25.Qf3 Ree2 (25...Rde2?! 26.Qb7 Kd8 27.Bf6 gf6 28.Rd1 Ke7 29.Qc7 Kf8 30.Nd7 Kg7 31.Ne5 Kh8 32.Nf7 Kg7 33.Ne5 Kh8 34.Nf7 Kg7 35.Ne5=) 26.Qb7 Kd8 27.Bf6 gf6 28.Ne6 Re6 29.Qb8 Kd7 30.Qb5 Kc8 31.Qe8 Re8 32.Kg1 Qf3 33.Re1 Re1; B) 25.Bf3 Rf2 26.Bg4 Bg4 27.Be5 Bf3 28.Kg1 Rg2 29.Kf1 Rc2 30.h4-+) 24...Ne5-+ 25.fe5 Re5 26.Ne6 (26.Kg1 g5 27.Rb1 f4-+) 26...Re8 (better 26...Re6 27.Kg1-+) 27.Bf5 (27.Nf4-+) 27...R5e6 (27...Rf5 28.Nf4 Rf4 29.gf4 Re2 30.Qg3 Qe6 31.Kg1 Qb6 32.Kh1 Qc6 33.Kg1 Rg2 34.Kf1 Rg3 35.Kf2 Qf3 36.Ke1 Rg2 37.Rd1 Re2) 28.Bg4+/- Bg4 29.h3?? (29.Qa7 Bf3 30.Kg1 b6 31.Qa6 Bb7+/-) 29...Rf6? (better 29...Re2 30.Qf1 Bd7=) 30.Qd2?? (better 30.Qa7 Ra6 31.Qd4 Bh3 32.Qg7+/-) 30...Bf3-/+ 31.Kh2?? (31.Kg1 Re2 32.Qg5 Rg2 33.Kf1 Bc6 34.Ke1 Rg1 35.Kd2 Ra1 36.b5-+) 31...Re2-+ 32.Qe2 Be2 33.Re1 Bc4 34.c3 Kd7 35.h4 (35.Re4 Be6 36.Rd4 Kc6-+) 35...h6 36.Kh3 Be6 37.g4 (37.Kg2 Bd5 38.Kh3 Rf3-+) 37...Rf3 38.Kg2 Rc3 39.Rd1 Ke7 40.Ra1 (40.g5 Ra3 41.Kf2 Ra2 42.Ke3 hg5 43.hg5 Rb2-+) 40...Bg4 41.Kf2 h5 42.Re1 Kd6 43.Ra1 Rc2 44.Ke3 Rc3 45.Kf4?? (45.Kf2 Rh3 46.Rc1-+) 45...Rc4-+ 46.Kg5 Ke6 (46...Bf3 47.Kg6 Rh4 48.Kg7-+) 47.Kg6 (47.Re1 Kf7-+) 47...Bf3 (better 47...Bf5 48.Kg7 Rg4 49.Kf8 Rh4 50.Rc1-+) 48.Kg7 (48.Re1 Kd6 49.Kg7 Rh4-+) 48...Rh4 49.Kg6 Rc4 (better 49...Rg4 50.Kh6 h4 51.Rf1-+) 50.Re1 Kd6 51.Kg5 Bg4 52.Re3 Kc6 53.Kf6 (53.Kh4 b6-+) 53...Kb5 (53...h4 54.Kg5 h3 55.Re1-+) 54.Rg3 (54.Kg5 Rc2-+) 54...c5 (better 54...h4 55.Rg2-+) 55.Kg5 (55.bc5 h4 56.Rg2 h3 57.Rb2 Kc6-+) 55...cb4 56.ab4 Kb4 57.Kf6 (57.Rg2 b5 58.Rb2 Kc5-+) 57...a5 58.Ke5 (58.Rg1 b5 59.Rb1 Kc5-+) 58...a4 59.Kd5 a3 60.Ra3 Ka3 61.Kc4 h4 62.Kd3 h3 63.Ke3 (63.Kd4 h2 64.Kd5 h1Q 65.Ke5 Qh2 66.Kf6 Qf4 67.Ke7 Qg5 68.Kd6 Qf6 69.Kc7 Qc6 70.Kb8 b5 71.Ka7 Bf3 72.Kb8 Qb7) 63...h2 64.Kf2 (64.Kf4 Bh3 65.Ke4 h1Q 66.Ke3 Qc1 67.Ke4 Qc6 68.Kd3 Qd5 69.Ke3 Qg5 70.Kd4 Qf4 71.Kc5 Qe5 72.Kb6 Bg2 73.Ka7 Qc7 74.Ka8 b5) 64...h1Q 65.Kg3 (65.Ke3 Qf3 66.Kd4 Kb4 67.Ke5 Qf2 68.Ke4 Kc4 69.Ke5 Qd4) 65...Qf3 66.Kh2 (66.Kh4 Qf5 67.Kg3 Bh3 68.Kh2 Qf3 69.Kg1 Qg2) 66...Bh3 67.Kg1 Qg2 0-1. hidratosugar (1670) - ferz_urga (1635), Rated Bullet game, lichess.org, 2015.

5.Nd4 Nd7 6.Nc3 g6 7.Nd5 Qd6 8.Ne3 Bg7 9.Nb5 Qb6 10.Nc7 Qc7 11.Bg7 f6 12.Bh8 Ne7 13.g3 Kf7 14.Bf6 Nf6 15.Bg2 Bd7 16.0-0 h5 17.d3 Rd8 18.c4 h4 19.Qb3 Be6 20.Be4 Ne4 21.de4 h3 22.f3 Qb6 23.c5 Qc6 24.Qc3 b6 25.Rac1 b5 26.Rfd1 Rd1 27.Rd1 Nc8 28.Nd5 Bd5 29.ed5 Qd7 30.d6 g5 31.Qb3 Kg6 32.Qd5 g4 33.Qg8 Kf5 34.Rd5 Kf6 35.Qg5 Kf7 36.Qf5 Qf5 37.Rf5 Ke6 38.Rf8 Kd7 39.Rc8 Kc8 40.fg4 Kd7 41.g5 1-0. RSdC (1785) - newg (1810), Rated Classical game, lichess.org.

5.Nd4 f5 6.e3 Nf6 7.c4 c6 (7...a5 8.cd5 Nd5 9.Nc3+=) 8.cd5+= cd5 (8...Nd5 9.Nc3+=) 9.Be2 (9.Bb5 Kf7+=) 9...Nc6 10.0-0 Nd4 11.Bd4 (worse 11.ed4 Qc7=+) 11...Qe6 (11...a5 12.Nc3+=) 12.Nc3 b6 (12...Bd6 13.Nb5+=) 13.Bf6+– gf6 14.Nb5 Bd6 (14...Qd7 15.Rc1 Bd6 16.Nd6 Qd6 17.d3+–) 15.Nd4 Qe5 (15...Qe7!?+–) 16.Bb5+– Kf7 17.g3 (17.f4!? ef3 18.Nf3+–) 17...f4+– 18.Bc6 fg3? (18...Rb8 19.d3 fg3 20.fg3+–) 19.fg3 (19.f4 ef3 20.Nf3+– (20.Ba8 g2 21.Nf3 gf1R 22.Qf1 Qh5–/+)) 19...Rg8 20.Ba8 Rg3 21.Kf2 Rg2 22.Ke1 Qh2 (22...Bg4 23.Bd5 Qd5 24.Qc2–+) 23.Qb3 (23.Qa4 Rd2 24.Qa7 Kg6 25.Rg1 Qg1 26.Kd2 Qa1 27.Bd5 Bb4 28.Kc2 Qc3 29.Kb1 Qd3 30.Ka2 Qd2 31.Kb1 Qe1 32.Ka2 Qf2 33.Kb1–/+) 23...Bg4–+ 24.Qd5 Kg7 25.Nf5 (25.Nf3 Bf3 26.Rf3 ef3 27.Kd1 Rg1 28.Kc2–+) 25...Kh8 26.Qd6 (26.Qg8 Kg8 27.d3 Re2 28.Kd1 Rc2 29.Ke1 Qe2) 26...Re2 27.Kd1 Rd2 28.Kc1 Rc2 29.Kb1 Rb2 (29...Rb2 30.Kc1 Qc2) 0–1. DEFFM – GuestMPSJ, freechess.org, 2018.

5.Nd4 Nf6 6.e3 a5 7.b5 Qe5 8.Qc1 (8.d3 Bd6=) 8...Bd6 9.Nf5?? (better is 9.d3=) 9...Qf5–+ 10.h3 (10.d3 0-0–+) 10...Be6 11.Be2 (11.Nc3 0-0–+) 11...Nbd7 (11...Qg6 12.Bf1–+) 12.d4 (12.f4 ef3 13.Bf3 Qg6–+) 12...h5 (12...0-0 13.Nd2–+) 13.Nd2 Ke7 (13...Qg6 14.Bf1–+) 14.a4 (14.c4 dc4 15.Nc4 Qg6–+) 14...g5 (14...Qg6 15.Bf1–+) 15.c4 (15.Ba3 Ba3 16.Qa3 Kd8–+) 15...dc4 16.Bc4 (16.Nc4 Nd5–+) 16...g4 (16...Rhc8 17.0-0–+) 17.Be6 fe6 18.Qc2 Bb4 (18...gh3 19.Rh3 Rag8 20.Kf1–+) 19.0-0-0 (19.Ba3–+) 19...Qf2 20.Rhf1 (20.Nc4 Qc2 21.Kc2 Nd5–+) 20...Bd2 (20...Qg2 21.Rh1–+) 21.Kb1 (21.Qd2 Qg3 22.Qf2–+) 21...Qg2 22.d5 Nd5 (22...ed5 23.Qc7) 23.Bh8 (23.Rg1 Qf2 24.Qd2 Qd2 25.Rd2 N7f6 26.Bf6 Nf6–+) 23...Ne3 (23...Ne3 24.Bf6 Nf6 25.Qc5 Kf7 26.Qh5 Ke7 27.Qc5 Kf7 28.Qh5 Ke7 29.Qc5 Kf7 30.Qh5=). Old Sisyphus – S, ChessWorld.net, 2005.

5.Ne5 Nc6?? 6.Nc6+= bc6 7.e3 Nf6 8.d3 Bg4 9.Be2 Be2 10.Qe2 Qd6 (10...a5 11.ba5 Ra5 12.Nc3=) 11.de4 de4 12.Nc3 Qe6 13.0-0 Nd5 (13...a5 14.Rfb1+=) 14.Na4 (14.Qc4 f5+/–) 14...Nf6 15.Nc5 (better is 15.Rfd1!?+/–) 15...Bc5= 16.bc5 0-0 17.Bf6 Qf6 18.c3 (18.Qg4!?=) 18...Qc3=+ 19.Rfc1 Qe5 20.Qg4 Rad8 21.Rc4?? (better is 21.Rab1=+) 21...Qa1 (22.Rc1 Qc1 23.Qd1 Rd1) 0–1. badboy1221 – jpsingh, Live Game Caissa's Web, 2004.

5.Ne5 f6 6.c4 fe5 7.cd5 Nf6 –+.

5.e3 a5 6.b5 Bd7 7.c4 c6 8.bc6 Bc6 9.cd5 Bd5 10.Be2 Nc6 11.0-0 Nh6 12.Nc3 Rd8 13.d4 e4 14.Nd2 Nf7 15.Nd5 Rd5 16.Bc4 Rd7 17.Qb3 Nfd8 (17...Nd6 18.Be6 Rc7 19.Rac1+–) 18.Rac1 g6 (18...f5!?+–) 19.Bb5 Rc7? (19...Qf7 20.Qf7 Kf7 21.Ne4 Bg7+–) 20.d5 Bg7 21.dc6 Nc6 (21...bc6 22.Qc4 f5 23.Bg7 Qg7 24.Nb3+–) 22.Bc6 Rc6 23.Rc6 bc6 24.Rc1 Qd7 (24...c5 25.Qd5 Qd7 26.Qc5+–) 25.Ne4 f5 (25...Qd5 26.Nf6 Bf6 27.Qb8 Qd8 28.Qd8 Bd8 29.Bh8 Kd7+–) 26.Bg7 Qg7 (26...fe4 27.Bh8 Qd5 28.Qb8 Qd8+–) 27.Nd6 (27.Qb8 Kf7 28.Ng5 Ke7 29.Qc7 Ke8 30.Qg7 Kd8 31.Ne6 Ke8 32.Rc6 h6 33.Rc8) 27...Kd7 28.Rd1 Kc7 29.Qb7 Kd8 30.Qg7 1–0. Fournier,Frederic – Fagoal, Partie evaluee, 3m + 1s, 2008.

5.e3 Nc6 6.c4 dc4 7.Bc4 Bg4 (7...e4 8.Nd4 Ne5 9.Be2=) 8.Qb3 Nh6 9.d4 (better 9.Qa4!?=) 9...Bf3=+ 10.gf3 ed4 11.Nd2 de3 12.fe3 0-0-0 13.0-0-0 Ne5 (13...g6 14.Ne4 Bg7 15.Nc5=+) 14.e4 (14.Be5 fe5 (14...Qe5? 15.Be6 Kb8 16.Nc4 Rd1 17.Rd1 Qe6 18.Rd8 Qc8 19.Rc8 Kc8 20.Qa4+-) 15.Ne4 Kb8=) 14...Nc4 (14...g6 15.Be2-/+) 15.Nc4=+ Rd1 16.Rd1 Nf7 17.Ne3 Ne5 18.Kb1 (18.Nf5!? Qe8 19.Qe3=+) 18...Nf3-/+ 19.Qd5 Ne5 (19...Ng5 20.e5 fe5 21.Nf5-/+) 20.Nf5 (20.Be5!? fe5 21.Nc4=+) 20...Qe8-/+ 21.Rc1 (21.Be5 fe5 22.Qa5 a6-/+) 21...Kb8 22.b5 (22.Rd1!? b6 23.Be5 fe5 24.Qd8 Qd8 25.Rd8 Kb7 26.Ne3=+) 22...g6-+ 23.Nd4 Bh6 (better 23...Bd6!?-+) 24.Rc2-/+ Bg5?? (better 24...Qd8-/+) 25.Ne6+- Nf7 (25...Qd7 26.Be5 Qd5 27.Bc7 Kc8 28.ed5 Kd7+-) 26.Nc7 (better 26.Rc7 Nd8 27.Rd7 Qe6 28.Rd8 Rd8 29.Qe6+-) 26...Qe7+= 27.Ne6 (27.Bd4 Qd6 28.Ba7 Ka7 29.Qc4+/-) 27...Re8?? (27...Rc8 28.Rc8 Kc8=) 28.Nc5 (better 28.Rc7 Qc7 29.Nc7+-) 28...Nd6?? Attacking the isolated pawn on e4 (28...Rd8 29.Qe6 Qe6 30.Ne6 Re8-/+) 29.a4?? (29.e5!? Rd8 30.Ne6+- (worse 30.ed6 Rd6 31.Qf3 Rd2+-)) 29...Bf4?? (29...Ne4 30.Re2 f5-/+ (worse 30...Qc5 31.Qc5 Nc5 32.Re8 Kc7 33.Re7 Kc8 34.Rh7+/-)) 30.h4?? (better 30.Bf6 Qf7 31.Qd4+/-) 30...Be5?? (30...Ne4 31.Qe4 Qe4 32.Ne4 Re4 33.Bf6 Ra4 34.Rc5-+) 31.Nd3?? (better 31.Rd2 Rc8 32.Be5 fe5 33.Qd6 Qd6 34.Rd6 Rc5 35.Re6=+) 31...Bb2-+ 32.Kb2 Ne4 33.Re2 (33.a5 Qd8 34.Qf7 Qd4 35.Kb1 Nd6 36.Qc7 Ka8-+) 33...f5 34.h5 Rd8 (better 34...Qf6 35.Kb3 Qc3 36.Ka2 Qc7-+ (36...gh5?! 37.Nc5 Qg7 38.Ne4 fe4 39.Qh5 Qg8 40.Ka3-+)) 35.Qc4 (35.Qe5 Qe5 36.Ne5 g5-+) 35...Qd6 (better 35...Qf6!? 36.Ka3 Rc8 37.Qd5 Qa1 38.Ra2 Qc3 39.Qb3 Qb3 40.Kb3 Rc3 41.Kb4 Rd3 42.Kc4-+) 36.hg6 (36.Rc2 gh5 37.Nc5 Qd4 38.Qd4 Rd4 39.Ne4 fe4-+) 36...hg6 (36...Rc8 37.Re4 Rc4 38.Rc4 Qd3 39.gh7-+) 37.Nb4 (37.Rc2 Qd4 38.Qd4 Rd4-+) 37...Qd4 (better 37...Qe5 38.Ka3 Rc8 39.Nc6 bc6 40.bc6 Qd6 41.Qb4 Qb4 42.Kb4 Rc6 43.Rh2-+) 38.Qd4 Rd4 39.Nc2 (39.Kb3 g5-+) 39...Rc4 (better 39...Ra4!? 40.Kb3-+) 40.Rg2 g5 41.Ne3 (41.Kb3 Rc3 42.Kb4 f4-+) 41...Rc5 (better 41...Ra4 42.Nf5 Rb4 43.Kc2 Rb5-+) 42.Kb3 (42.Rh2 f4 43.Ng4 f3-+) 42...b6 (better 42...Rc3 43.Kb4 Re3-+) 43.Kb4 f4 (43...f4 44.Nf1 Kc7-+) 0-1. zembelek (2005) - jr2412 (1850), Rated Blitz game, lichess.org, 2013.

5.e3 Be6 6.d4 ed4 (6...e4 7.Nfd2=) 7.Nd4+= Bf7 8.Nd2 g6 9.b5 Bg7 10.c4 Nd7 11.Qc2 Ne5 12.cd5 Bd5 13.e4 (13.Rc1 0-0-0+=) 13...f5= 14.Be2 (14.f3 fe4 15.fe4 Ng4=) 14...fe4=+ 15.Ne4 Nf6 (15...Nc4! 16.Bc4 Be4=+) 16.Nf6= Bf6 17.0-0 0-0 18.f4 Nf7 19.Kh1 Qd7 (19...Rad8 20.Rad1=) 20.Rad1 Nd6 21.Nf3 Nf5?? (21...Bf3 22.Bf3 Bb2 23.Qb2 Qg7 24.Bd5 Kh8+=) 22.Rd5!+– Qe6 (22...Qd5 23.Bc4) 23.Rf5 (23.Bf6 Qf6 24.Qc7 Rf7+–) 23...Qf5 24.Qc4 Kg7 25.Qc7 (25.Nd4 Qd7 26.Ne6 Kh8 27.Nf8 Rf8+–) 25...Kh6 (25...Rf7 26.Qc1 Bb2 27.Qb2 Qf6+–) 26.Ng5 1–0. Wolf – Krueger, corr DDR, 1981.

5.e3 Be6 6.Be2 g5 (6...Nd7 7.d4 e4 8.Nfd2=) 7.0-0 h5 (7...Nd7 8.d4=) 8.d4+= g4 (8...e4 9.Nfd2+=) 9.Nh4 Qf7 (9...Qg7 10.de5 fe5 11.f4+=) 10.de5+– fe5 (10...Bg7 11.f4 fe5 12.fe5+–) 11.Be5 Be7? (better 11...Bg7 12.Qd4 Bf6+–) 12.Bh8+– Bh4 13.f3 g3 14.hg3 Bg3 15.f4 Qe7 16.Bh5 Kd7 (16...Kd8 17.Bg6 Qf8 18.Bd4+–) 17.Bg4 Qh4 (17...c6 18.Be6 Qe6+–) 18.Qd5 Ke8 19.Qe6 Ne7 20.Rf3 Qh2 21.Kf1 Qh1 (21...Qh8 22.Rg3 Kd8 23.e4 Qh1 24.Ke2+–) 22.Ke2 Qg2 (22...Qh8 23.Rg3 a5 24.b5+–) 23.Kd3 Nbc6 (23...Qh2 24.Bf6 Nbc6 25.Qd7 Kf7 26.Be7 Ne7+–) 24.Bh5 Kd8 25.Qf7 Be1 26.Qe8 1–0. DEFFM – GuestNDNQ, freechess.org, 2019.

5.e3 Bf5 6.Nc3 c6 7.d4 (7.Be2!?+–) 7...e4+= 8.Nh4 (8.Nd2!?+=) 8...Be6= 9.Qh5 (9.g3 g5 10.Ng2 Nh6=) 9...Bf7 (9...Qf7 10.Qf7 Kf7 11.g3=+) 10.Qe2 (10.Qg4 Qe6 11.f3 Qg4 12.fg4 Be6=+) 10...Qe6=+ 11.f3 (11.g3!?=+) 11...g5–/+ 12.fe4 gh4 13.0-0-0 (13.ed5 cd5 14.e4 Ne7–/+) 13...Nh6 (13...Ne7 14.Qf2–+) 14.b5 (14.ed5 cd5 15.Qb5 Qc6=+) 14...Nd7 (14...f5!? 15.bc6 bc6 16.ef5 Nf5 17.e4–/+) 15.bc6–/+ bc6 16.ed5 cd5 17.Nb5? (better 17.e4!?–/+) 17...Bd6 (17...Kd8 18.e4–+) 18.Rd3 (18.Nd6 Qd6 19.e4 0-0–+) 18...a6 (better 18...0-0!? 19.Nd6 Qd6 20.Qf2–+) 19.Nd6 Qd6 20.Rb3 (better 20.e4 0-0 21.Qd2–+) 20...Rb8 (20...Bg6!? 21.Qf2–+) 21.Rb8 (21.Qa6!? Ke7 22.a4 Qa6 23.Ba6=+) 21...Nb8–+ 22.g3 (22.e4 0-0 23.Qd2 Kg7–+) 22...Nf5 (better 22...hg3!? 23.a4 Bg6 24.hg3 Nf5–+) 23.Bh3 Bg6 24.gh4 (24.e4 de4 25.Qe4 Ne7–/+) 24...Nh4 25.Qf2 (25.Rf1 Be4–/+) 25...Qc7 (25...Be4 26.Rf1 Nf3 27.Qe2–+) 26.c3 (26.Kb1 Be4 27.Rf1 Ng6–+) 26...Be4 (26...Qe7 27.Qf4 (27.Qh4?? Qe3 28.Kd1 Qd3 29.Ke1 Qb1 30.Kf2 Qb2 31.Kg1 Be4–+) 27...Nc6 28.c4–+) 27.Rg1 (27.Qf6 Ng6 28.Bf5 Rf8 29.Qe6 Qe7 30.Qe7 Ne7 31.Be4 de4–+) 27...Ng6 28.Qf6?? (better 28.Bf1–+) 28...Qf7 (better 28...Qh2 29.Qe6 Ne7–+) 29.Qd6+= Nd7 30.Be6 (30.Qc6!? Kd8 31.a4=) 30...Qe7= 31.Qa6 Ngf8 32.Bg8 (32.Qc8 Qd8 33.Bf7 Ke7 34.Qd8 Kd8=) 32...Nf6 (32...Qf6 33.Qa8 Ke7 34.Bd5–/+) 33.Qa8 Qd8 34.Qa4 N8d7 35.Be6 Bg6 36.c4 (36.Rg5=) 36...Bf7?? (better 36...Ke7 37.Bd5 Nd5 38.cd5 Qc7 39.Qc6 Qh2 40.Rg6 hg6–/+) 37.cd5+= Nd5 38.Bf7 Kf7 39.Qb3 (better 39.e4!? N5b6 40.Qb3 Ke8 41.Qe6 Qe7 42.d5+–) 39...N7f6=+ 40.e4 (40.Qb7!? Ke6 41.Rg5=+) 40...Ne4–/+ 41.Qb7 Qc7 42.Qc7 Nc7 43.d5 (better 43.Rf1 Kg6 44.Kc2–/+) 43...Rd8?? (better 43...Nf6–/+) 44.Rg7+– Ke8 45.Rc7 Rd5 46.Rh7 Rf5 47.h4 Kf8 48.h5 Rf1 49.Kc2 Rh1 50.a4 (better 50.h6 Rh2 51.Kb3 Rh3 52.Kb4 Rh4+–) 50...Kg8? (better 50...Rh2 51.Kb3 Nc5 52.Kc4 Na4+–) 51.Rh8 Kf7 52.a5 Rh2 53.Kb3 Rd2 (53...Rh4 54.Bd4 Nd2 55.Kc3+–) 54.a6 Nc5 55.Kc3 Rd7 (55...Ne4 56.Kc4 Rb2+–) 56.Rh7 Ke6 57.Rd7 Nd7 58.h6 Kf7 59.Kb4 Kg6 60.Bg7 Nb8 61.Kb5 Na6 (61...Kf7 62.a7 Nc6 63.Kc6 Kg6 64.a8Q Kf5 65.h7 Kg4 66.h8Q Kf3 67.Qh3 Kf4 68.Qa5 Ke4 69.Qaf5) 62.Ka6 Kh7 (62...Kg5 63.Kb6 Kf4 64.Kc5 Kg3 65.h7 Kf3 66.h8Q Kg4 67.Qc8 Kg5 68.Bd4 Kf4 69.Kc4 Kg5 70.Qc6 Kg4 71.Qe4 Kg5 72.Kc5 Kh5 73.Bf6 Kh6 74.Qg4 Kh7 75.Qg7) 63.Kb6 (63.Kb5 Kg6 64.Kb4 Kg5 65.Kc4 Kg6 66.Kc3 Kf5 67.h7 Ke4 68.h8Q Kf5 69.Qh5 Ke6 70.Kc4 Kd7 71.Qd5 Kc8 72.Qc6 Kb8 73.Qd7 Ka8 74.Qc8 Ka7 75.Bd4) 63...Kg8 (63...Kg6 64.Kc7 Kf5 65.h7 Kf4 66.h8Q Ke3 67.Qh3 Kd2 68.Kc6 Ke2 69.Kd5 Kf2 70.Kc4 Ke2 71.Qg2 Kd1 72.Kd3 Ke1 73.Qe2) 64.Kc6 Kh7 (64...Kf7 65.Kd5 Kg8 66.Kd6 Kh7 67.Kd7 Kg6 68.Ke6 Kg5 69.h7 Kg4 70.h8Q Kg3 71.Qh5 Kf2 72.Bd4 Ke1 73.Be3 Kf1 74.Qf3 Ke1 75.Qg2 Kd1 76.Qd2) 65.Kd7 (65.Kd7 Kg6 66.Ke6 Kg5 67.h7 Kg4 68.h8Q Kg3 69.Qh5 Kf2 70.Bd4 Ke1 71.Be3 Kf1 72.Qf3 Ke1 73.Qg2 Kd1 74.Qd2) 1–0. owkenobi – pkrga, gameknot.com, 2017.

5.Bg2 Nbd7 6.Nf3 =+.

5.Bg2 e4 6.Nc3 d4 (6...a5 7.b5+=) 7.Na2 (better is 7.Nb5!?+=) 7...c5+= 8.bc5 Qc5 9.e3 Bg4 (9...de3 10.fe3 Be7 11.Bd4=) 10.Ne2 (10.ed4 Qb6 (10...Bd1? 11.dc5 Bc2 12.Nb4+–) 11.Qb1 Nbd7+=) 10...de3 11.de3 Nc6 (better is 11...Nbd7!?+=) 12.Bf6+= gf6 13.Be4 Rd8 14.Bd3 (14.Qb1 f5 15.Bg2 Be2 16.Ke2 Qc4 17.Ke1 Bg7=) 14...Qa3 15.Qc1 (15.Qb1 Qe7=) 15...Qc5 (15...Qc1 16.Nec1 Bd6 17.c3+=) 16.Qb2 Qa5 17.Nac3 (17.Nec3 Rd7=) 17...Qb4 18.Qb4 Nb4 (18...Bb4 19.0-0=) 19.Kd2+= Rg8? (19...a6 20.Nd4+=) 20.Nd4 (20.Ra7 Nd3 21.cd3 Bb4+–) 20...a6 (20...Nd3 21.cd3 Bc5 22.h3 Bd4 23.ed4+/–) 21.Ne4 (better is 21.Bh7!? Rh8 22.Be4+–) 21...Be7 22.Rhb1 Bf3?? (better is 22...f5 23.Nf6 Bf6 24.Rb4 Rd7+=) 23.Nf6 (23.Nf6 Bf6 24.Rb4+/–) 1–0. mwojo (1745) – pauldopson, net–chess.com, 2004.

5.Bg2 g6 6.Nf3= Nbd7 7.0-0 Bg7 8.d4 e4 9.Ne5 0-0 10.c4 c6 11.Qb3 dc4 (11...Rd8 12.Nc3=) 12.Nc4 Nd5 13.Nc3 Bd4 (better is 13...N7f6!?=) 14.Nd5+/– Bf2?? (better is 14...cd5 15.Bd4 dc4 16.Qc4 Re8+/–) 15.Rf2+– cd5 16.Ne3 (16...Nb6 17.Nd5 Nd5 18.Qd5+–) 1–0. oldsage – shoulders, ChessWorld.net, 2006.

4.Nc3 A) 4...Be6 A1) 5.e4 a5 (5...Nf6 6.Nf3 Nbd7 7.Be2 d5 8.Nb5 Kd8=; 5...Nd7 6.Nf3 0-0-0 7.d4 ed4 8.Qd4 Nb6+=) 6.Nd5 Qd8 7.Nf3 Nf6 8.Nf6 Qf6=; A2) 5.Nf3 Nf6 (5...a5 6.e4 Nd7 7.d4 Ngf6 8.d5 Bg4+=; 5...Nd7 6.d4 Nb6 7.e4 0-0-0 8.d5 Bg4+=) 6.e4 Nbd7 7.Be2 d5 8.Nb5 Kd8=; B) 4...a5 B1) 5.e4 Be6 (5...Nf6 6.Nf3 ab4 7.ab4 Ra1 8.Qa1 c6+=) 6.Nd5 Qd8 7.b5 c6 8.Nc3 d5=; B2) 5.b5 Nf6 6.e4 Nbd7 7.Bc4 Nb6 8.Ba2 Bg4=; B3) 5.Nd5 Qd8 6.b5 c6 7.Nc3 d5 8.Nf3 e4=+; B4) 5.Nf3 e4 (5...Be6 6.e4 Nd7 7.Be2 Nb6 8.d4 Nf6+=; 5...Nf6 6.e4 ab4 7.ab4 Ra1 8.Qa1 Qd8=) 6.Nd4 Nf6 7.b5 d5 8.e3 Qd8=; C) 4...Nf6 5.e4 Nc6 (5...a5 6.Nf3 ab4 7.ab4 Ra1 8.Qa1 Qd8+=; 5...Be6 6.Nf3 a5 7.b5 Nbd7 8.Ng5 d5+=; 5...Nbd7 6.Nf3 Nb6 7.Be2 Bd7 8.0-0 Bc6=) 6.Bb5 a6 7.Bc4 Nd4 8.Nge2 b5=.

4.c4 b6 5.Nc3 c6 6.g3 Bb7 7.Bg2 Nf6 8.d3 h5 9.Nf3 c5 (9...d5 10.cd5 cd5 11.Ne5+=) 10.Qa4 Qd7 11.Qc2 (11.Qd7 Nbd7 12.0-0 Be7+=) 11...a6 12.e4 Nc6 13.b5 Nd4 14.Nd4 cd4 15.ba6 Ba6 16.Ne2 h4 17.gh4 Rh4 18.Ng3 g6 (18...b5 19.Bd4 bc4 20.dc4 ed4 21.e5=) 19.f3 (better is 19.Bd4!? ed4 20.e5=) 19...b5–/+ 20.cb5 Qb5 21.a4 (21.Bc1!? Rc8 22.Qd1–/+) 21...Qd3 22.Qc6 Ke7 23.Bf1? (better is 23.Ra3 Qb1 24.Qc1 Qc1 25.Bc1–+) 23...Qe3 24.Ne2 Be2 25.Be2 (25.Qb7 Nd7 26.Bc1 Qc3 27.Ke2–+) 25...d3 26.Kd1 Qe2 27.Kc1 Bh6 (27...Rh2 28.Qb7 Nd7 29.Qd7 Kd7 30.Rh2 Qe1) 28.Kb1 Rb8 29.Qc3 Be3 (29...Nd5 30.ed5 Rc4 31.Qb3 Rb3 32.Ra2 d2 33.Ka1 d1Q 34.Rd1 Qd1 35.Bc1 Rc1) 30.Re1 (30.Ra3 Qf3 31.Re1 d2 32.Qd2 Qe4 33.Qd3 Rb2 34.Ka1 Rb3 35.Rb3 Bd4 36.Qd4 Qd4 37.Kb1 Qd5–+) 30...Qc2! 31.Qc2 dc2 32.Kc2 (32.Ka2 Nd5! 33.Re2 f5–+) 32...Rh2 33.Kd3 Rhb2 (33...Rhb2 34.Re3 R8b3 35.Kc4 Re3–+) 0–1. Morgenstern,Frank – Borgenau,Alexander, Blankenburger op–B, 2007.

4.c4 Nf6 5.Nf3 =.

4.d4 ed4 5.Qd4 Bf5 6.Qd5 =.

4.d4 e4 5.e3 g6 6.c4 f5 (6...Nf6 7.Nc3=) 7.Ne2 Bg7 8.Nf4 Bd7 9.Nc3 Nc6 10.b5 Na5 11.Qa4 b6 12.Qc2 c6 13.bc6 Bc6 (< 13...Nc6 14.Nfd5 Qd8 15.Nb5+–) 14.Ncd5 Bd5 15.Nd5 Qg5?? (better is 15...Qd7+/–) 16.Nc7+– (16...Kf7 17.Na8+–) 1–0. miehnekort – pato_lucas222, Yahoo, 2005.

4.e3 a5 A) 5.Nf3 ab4 6.ab4 Ra1 7.Ba1 Nf6 8.Be2 Nd5=; B) 5.Nc3 Be6 (5...Nf6 6.Nf3 d5 7.b5 Qe6 8.Ng5 Qd7=) 6.Nf3 Nf6 7.d4 e4 8.d5 Bg4=; C) 5.Be2 Qg5 (5...Be6 6.Nf3 ab4 7.ab4 Ra1 8.Ba1 Nf6=; 5...ab4 6.ab4 Ra1 7.Ba1 Qg5 8.Bf1 Qg6=) 6.Bf3 ab4 7.ab4 Ra1 8.Ba1 c6=+; D) 5.b5 Nf6 6.Be2 Bf5 7.Nf3 Nbd7 8.0-0 Rd8=.

4.e3 a6 A) 5.Be2 Qg5 (5...Nf6 6.Nf3 e4 7.Nd4 c5 8.Nb3 Nc6=) 6.Bf3 Nf6 7.Nc3 Be7 8.Nge2 0-0=; B) 5.Bc4 Nf6 (5...Nd7 6.Bb3 Ngf6 7.Ne2 c6 8.d4 a5=) 6.Nc3 Nbd7 7.Nf3 e4 8.Ng5 Ne5=; C) 5.Nc3 Nf6 6.Bc4 Be6 7.Be6 Qe6 8.e4 Nc6=; D) 5.Ne2 Nd7 (5...Bg4 6.h3 Bf5 7.d4 Nf6 8.Ng3 Bg6=; 5...Nf6 6.d4 Bg4 7.d5 c6 8.c4 Qc7=; 5...Nc6 6.d4 Nf6 7.d5 Nd8 8.Nec3 Ng4=; 5...c5 6.bc5 dc5 7.Nbc3 Nf6 8.Ng3 Be6=) 6.d4 Nb6 7.Nd2 Na4 8.Bc1 Nf6=; E) 5.d4 ed4 (5...Nf6 6.Ne2 Bg4 7.h3 Bh5 8.g4 Bg6=) 6.Bd4 Nc6 7.Nf3 Nd4 8.Nd4 Nf6=; F) 5.Nf3 e4 (5...Nf6 6.Nc3 e4 7.Nd4 c5 8.Nde2 b5=) 6.Nd4 Nf6 7.d3 c5 8.bc5 dc5=.

4.e3 c6 5.Nf3 f6 6.d4 g6 7.c4 Nh6 8.Nc3 Nf7 9.Qb3 Bg7 10.Be2 0-0 11.h4 Rd8 12.h5 g5 13.0-0-0 h6 14.c5 dc5 15.dc5 Be6 16.Bc4 Bc4 17.Qc4 Nd7 18.e4 Nf8 19.Ne2 Qe6 20.Qc2 Rd1 21.Rd1 Rd8 22.Rd8 Nd8 23.Ng3 Nf7 24.Nf5 Qe8 25.Qd3 Qd7 26.Kc2 Qd3 27.Kd3 Ne6 28.g3 Bf8 29.Kc4 Nfd8 30.a4 Kf7 31.Ba3 Ke8 32.b5 Kd7 33.Nh2 a6 34.Ng4 ab5 35.ab5 Nf7 36.Nf6 Kc7 37.Ng4 cb5 38.Kb5 Ned8 39.Bb2 Nc6 40.Nfe3 Bg7 41.Nd5 Kd7 42.Kb6 Nfd8 43.Nde3 Nd4 44.Bd4 ed4 45.Nf5 d3?? 46.Ng7 Ke7 47.Nf5 Ke6 48.Nfh6 d2 49.Ne3 Ke5 50.Kc7 Ne6 51.Kb7 Nc5 52.Kc6 Ne4 53.Nhg4 Kd4 54.h6 Nf2 55.Nf2 Ke3 56.Nd1 Ke2 57.Nc3 Kd3 58.Nd1 Kc2?? 59.Nf2+– d1Q 60.Nd1 Kd1 61.h7 Ke2 62.h8Q Kf3 63.Qf6 Kg4 64.Qg5 Kg5= 65.Kd5 Kf5 66.Kd4 Kg4 ½–½. ferminkatcho (1800) – chrischess (1750), kurnik, 2012.

4.e3 Bd7 A) 5.Nf3 a5 (5...e4 6.Nd4 Nf6 7.Be2 c5 8.Nb5 Na6+=; 5...Nf6 6.Be2 a5 7.b5 Bf5 8.0-0 Nbd7+=) 6.b5 Nf6 7.Be2 c6 8.0-0 e4=; B) 5.Bc4 b5 (5...Nf6 6.Nf3 Nc6 7.Nc3 0-0-0 8.Nd5 Nd5=; 5...a5 6.b5 Nf6 7.Nc3 c6 8.Nf3 d5=) 6.Be2 a5 7.Nf3 c6 8.Nc3 d5=; C) 5.Nc3 Nf6 (5...Be6 6.Nf3 Nf6 7.Ng5 d5 8.Be2 a5=; 5...a5 6.b5 Nf6 7.Bc4 c6 8.bc6 bc6=) 6.Nf3 e4 7.Nd4 c5 8.Ncb5 Na6=.

4.e3 Bf5 5.Nf3 Nd7 6.Be2 g6 7.d3 Bg7 8.h3 Ngf6 9.e4 Be6 10.c4 0-0 11.Nc3 Nh5 12.g3 c6 13.Bc1 f5 14.Bg5 Qe8 15.ef5 Bf5 16.g4 (better is 16.Nh4!? e4 17.d4=) 16...e4–/+ 17.de4?? (better is 17.Ne4 Be4 18.de4 Ba1 19.Qa1 Qe4 20.Qd4 Qb1 21.Qd1 Qd1 22.Kd1–+) 17...Bc3–+ 18.Kf1 Be4 19.Rc1 Bf6 20.gh5 (20.Bf6 Nhf6 (20...Rf6?! 21.gh5 Ne5 22.Ne5 Bh1 23.Ng4–+; 20...Ndf6?! 21.gh5 Nh5 22.Rg1–+) 21.Qd6 Ng4 22.hg4 Bf3 (22...Rf3?! 23.Bf3 Bf3 24.Rh3 Bg4 25.Re3–+) 23.Bf3 Rf3–+) 20...Bf3 (20...Bg5!? 21.Rc3–+) 21.Bf3 Bg5 22.hg6 (22.Rc3 Qe5 23.Qc2 Qf6–+) 22...Qg6 (better is 22...Bc1 23.gh7 Kh8–+) 23.Rc3 Ne5 24.Bh5 Qf5 25.Qe1 (25.Rh2–+) 25...Bh4 26.Rg1 (26.Bg4 Qf2 27.Qf2 Rf2 28.Kg1 Raf8–+) 26...Kh8 27.Bg4 (27.Rg2 Qh5 28.Qe2 Nf3–+) 27...Qf2 28.Qf2 Rf2 29.Ke1 Rc2 (29...Rc2 30.Rcg3 Rc3–+) 0–1. Fournier,Frederic (1685) – LucasGrijander (1655), Active, 2006.

4.e3 Nf6 A) 5.Nc3 a5 (5...Nc6 6.Nf3 e4 7.b5 Ne5 8.Ne5 de5=) 6.b5 d5 7.Nf3 Qe6 8.Ng5 Qd7=; B) 5.d4 Nbd7 (5...ed4 6.Bd4 Nc6 7.Bb5 Bd7 8.Nf3 a5=; 5...a5 6.b5 Bf5 7.Ne2 Nbd7 8.Ng3 Bg4=; 5...Bf5 6.Nd2 e4 7.c4 Nbd7 8.Ne2 c6=) 6.Be2 e4 7.d5 Ne5 8.Nd2 Nd5=; C) 5.Be2 Bf5 (5...Be6 6.Nf3 Nbd7 7.0-0 0-0-0 8.c4 Nb6=) 6.Nf3 Qd8 7.0-0 Be7 8.d3 0-0=; D) 5.Nf3 a5 6.Be2 ab4 7.ab4 Ra1 8.Ba1 Nbd7=.

4.e3 g6 5.d4 Bg7 6.de5 (6.Bb5 Nd7=) 6...de5 7.Nf3 Nd7 (7...Nf6 8.Be5 0-0 9.Bd3=) 8.Nc3 b6? (better 8...Ngf6 9.Nb5 0-0 10.Nc7 Rb8+=) 9.Nb5+– Ndf6? (better 9...Nb8 10.Qd5 c6 11.Nd6 Kf8+–) 10.Be5 (10.Ne5 Bb7 11.Be2 Rd8=) 10...Bb7 (10...Kf8 11.Nc7 Ne4 12.Bg7 Kg7 13.Na8 Ngf6+–) 11.Nc7 Kf8 12.Bd6 Rd8 (12...Rc8 13.Be7 Ne7 14.Nb5+–) 13.Be7 Ke7 14.Nd4 Nh6 (14...Rd7 15.Ncb5 a6 16.Nc3+–) 15.Ba6 Bg2 (15...Be4 16.f3 Rd7 17.fe4 Rc7 18.Qf3+–) 16.Rg1 Be4 17.f3 Bf5 18.Nc6 Kf8 19.Qd8 Ne8 20.Qe8 1–0. Barcarola (1700) – fww4400g, internet free game, 2018.

4.e3 h5 5.Nf3 (5.d4 Nf6=) 5...g6 (5...h4 6.h3+=) 6.Bc4+= Bg7 (6...Nd7 7.0-0+=) 7.0-0 Nf6 8.d3 (8.Nc3 Be6 9.Be6 Qe6+=) 8...0-0 (8...Nbd7 9.Bb3=) 9.e4= a6 (9...c6 10.Nbd2=) 10.Ng5 (10.Nc3 c6+=) 10...Be6 (10...b5 11.Bb3+=) 11.Ne6 fe6 12.Nd2 (12.Qf3+=) 12...c5 (12...Nc6!?+=) 13.bc5+– dc5 14.Nf3 (14.a4 Nc6+–) 14...Nfd7 15.Bc1 (15.Qd2 b5 16.Qg5 Qf7+–) 15...b5 16.Bb3 Nc6 Black prepares b4 17.c3 a5 Black prepares b4 (17...Rad8 18.Qe2+–) 18.Ng5 (18.Rb1 Rab8+–) 18...Nd8 (18...Rf6 19.Rb1+–) 19.a4 (19.Rb1 b4+–) 19...b4 20.Be3 (20.Qc2 Rb8+–) 20...Bf6 (20...Nf6 21.cb4 cb4 22.Qc1+–) 21.Qc1 (21.Nf3 h4+–) 21...bc3 (21...Rb8 22.Rb1+–) 22.h4 Rb8 (22...Qd6 23.Qc3 Bg5 24.hg5+=) 23.Qc3 Bg7 (23...Qd6 24.Rfc1+–) 24.Bc4 Ra8 (24...Rb4 25.Qc2+–) 25.Rab1 Nf6? (25...Rf6 26.Rfc1+–) 26.Qe5 (26.Bc5 Qc5 27.Ne6 Qe7 28.Nd8 Kh8+–) 26...Ng4? (26...Nd5 27.Qh2 Nc3 28.Ne6 Ne6+–) 27.Qc5+– Ne3 (27...Qd7+–) 28.Qe7 Nf1 29.Rb7 Nb7 (29...Nf7 30.Nf7 Rfb8 31.Nh6 Bh6 32.Be6 Kh8 33.Qh7) 30.Qe6 Kh8 (30...Rf7 31.Qf7 Kh8 32.Qg6 Rg8 33.Qh7) 31.Qg6 Rf2 1–0. DEFFM – GuestKXYC, freechess.org, 2018.

4.e4 a5 A) 5.Nf3 ab4 6.ab4 Ra1 7.Ba1 Nf6 8.Nc3 Nc6=; B) 5.b5 Nd7 6.Nc3 Ngf6 7.Bc4 Nb6 8.Ba2 Bd7=; C) 5.Bc4 ab4 6.ab4 Ra1 7.Ba1 Na6 8.Ba6 ba6=; D) 5.Ne2 ab4 6.ab4 Ra1 7.Ba1 Na6 8.b5 Nc5=; E) 5.h3 ab4 6.ab4 Ra1 7.Ba1 Nf6 8.Nc3 c6=; F) 5.Nc3 Nf6 6.Nf3 ab4 7.ab4 Ra1 8.Qa1 Qd8=.

4.e4 a6 5.Nc3 Nd7 6.Nf3 b6 (6...Nb6 7.Be2+=) 7.Bc4 h6 (7...c6 8.0-0+=) 8.0-0 Ngf6 9.Re1 Bb7 (9...c6 10.d4+/–) 10.d4 ed4 (10...c6 11.a4+/–) 11.Nd5 Qd8 (11...Nd5 12.ed5 (12.Bd5?! c6+/–) 12...Ne5 13.Bd4+–) 12.e5 (12.Bd4 Be7+–) 12...Ne5 (12...Nd5!? 13.ed6 Ne7 14.de7 Be7 15.Qd4 Nf6+–) 13.Ne5+– (13.Qd4?! c5 14.Qd3 Bd5 15.Bd5 Nd5 16.Qd5 f6+=) 13...de5 14.Re5 Be7?? (14...Kd7 15.Nf6 Qf6 16.Qd4 Bd6 17.Qg4 Kd8 18.Re8 Re8 19.Bf6 gf6+–) 15.Ne7 (15.Re7?! Kf8 16.Rf7 Kf7 17.Nc7 Kg6 18.Na8 b5+–) 15...Kf8 16.Qd4 (16.Bd4 Be4+–) 16...b5 (16...Qd4 17.Bd4 Nd7 18.Rf5+–) 17.Bb3 (17.Bd5 Nd5 18.Rd5 Bd5 19.Ng6 Ke8 20.Re1 Be6 21.Qg7 Kd7 22.Nh8 Qg5+–) 17...Qd5 (17...Qd4 18.Bd4 Nd7+–) 18.Nd5 (18...Bd5 19.Rd5+–) 1–0. b4_player – twlssn03, gamecolony.com, 2006.

4.e4 c6 =.

4.e4 Be6 5.Nf3 Nf6 (5...Nd7 6.d4 Ngf6 7.Nc3 ed4 8.Nd4 0-0-0+=) 6.Nc3 (6.Ng5 Nc6 7.Ne6 Qe6 8.Nc3 0-0-0=) 6...g6 (6...a5 7.b5 Nbd7 8.Ng5 d5+=) 7.Bb5 (7.Be2 Bg7 8.Ng5 0-0=) 7...c6 8.Ba4 (8.Be2 Bg7=) 8...Bg7 (8...Bh6=) 9.Ng5 0-0 10.Ne6 fe6 11.0-0 d5 12.ed5 ed5 13.Qe2 e4 14.d4 (14.f3 Nbd7=) 14...Nbd7 (14...b5 15.Bb3 a5 16.f3=) 15.Bb3 Kh8 16.Rad1 Nh5 17.Qg4 Rf4 18.Qe2 Qg5 (better is 18...Rf5!? 19.Qe3 Nf4+=) 19.Bc1+/– Raf8 (19...Qh4 20.Bf4 Nf4 21.Qe3+/–) 20.g3 (20.Bf4?? Nf4 21.g3 Ne2 22.Ne2 Qg4–+) 20...Qe7? (20...Qg4 21.Bf4 Rf4 22.Qg4 Rg4 23.Nd5 cd5 24.Bd5 Nf4 25.Bb7 Ne2 26.Kg2 Nc3+–) 21.gf4+– Qh4 (21...Nf4 22.Qg4 g5 23.Kh1+–) 22.f3 Rf4 (22...Nf4 23.Bf4 Rf4 24.fe4 Rf1 25.Qf1 (25.Kf1?! Qh3 26.Qg2 Qc3+–; 25.Rf1?! Bd4 26.Kh1 Bc3 27.ed5 Ne5+–) 25...de4 26.Qf2 Qg5 27.Kf1+–) 23.Bf4 Nf4 24.Qe1 Nh3 25.Kg2 Nf4 26.Kh1 Qh3 (26...Qe1 27.Rfe1 Nh3 28.Kg2 Nf4 29.Kg3 Nh5 30.Kf2+–) 27.Qg3 Qg3 28.hg3 Nh5 29.Kg2 ef3 30.Rf3 Nhf6 31.Re1 h5 (31...a6 32.Re7+–) 32.b5 Ng4 (32...g5 33.Re6 g4 34.Rf5+–) 33.Rf7 (better is 33.Re8!? Kh7 34.Rf7 Kh6 35.Rd7 a6 36.Rb7 ab5+–) 33...Bd4 (33...Ngf6+–) 34.Re8 1–0. pierre – joju, internet, 2008.

4.e4 Qf6 5.d4 ed4 6.Bd4 Qf4 7.Nc3 c5 8.Be3 Qe5 9.Nd5 cb4?? (better is 9...Kd8 10.bc5 Qe4 11.cd6 Bd6+/–) 10.Nc7+– Kd8 11.Na8 Qa5 (11...Qe4 12.Nf3 ba3+–) 12.Qd5 Qb6 (12...Qd5 13.ed5 Bf5+–) 13.Nb6 ab6 14.Qf7 Nh6 15.Bb6 1–0. market (1845) – girishs, GameColony.com, 2002.

4.e4 Qh4 5.Nc3+= Nf6 6.Nf3 Qf4 (6...Qh5 7.d4 c6 8.Be2+=) 7.Be2 (7.d4 A) 7...Ne4? 8.Nd5 Nc3 9.Nc3+– (9.Nf4?! Nd1 10.Nd5 Nb2 11.Nc7 Ke7+–; worse 9.Bc3 Qe4 10.Ne3 Qc6+–); B) 7...c6+=) 7...Ne4?? (better 7...Qg4 8.0-0 Qg6+=) 8.Nd5+– (8.Nd5 Qg4 9.Nc7 Kd8 10.Na8 Qg2 11.Rf1+–) 1–0. Pierre – GuestSxqey, internet, 2020.

4.Nf3 b5 5.e3 c6 6.Be2 g5 7.h3 h5 8.d3 h4 9.Nbd2 f6 10.c4 a6 11.cb5 cb5 12.Rc1 Bb7 13.Qc2 Nc6 14.Nb3 Nh6 15.d4 Rc8 16.Qd3?? (16.Qg6 Qf7 17.Qd3 Be7+/–) 16...ed4?? (better is 16...e4 17.Qd2 ef3 18.Bf3 Rg8–+) 17.Nfd4 Nd4 18.Qd4 (better is 18.Rc8!? Bc8 19.Nd4+/– (worse is 19.ed4 Bf5 20.Qc3 Qe4+=)) 18...Rc1= 19.Bc1 (better is 19.Nc1!? Bg2 20.Rh2=) 19...Bg2–/+ 20.Rg1 Nf5 (better is 20...Bh3!? 21.Rg5 Be6–+) 21.Qg4 Be4 22.Nd4 (22.Bb2!? d5 23.Nc5=) 22...Nd4–/+ 23.ed4 Bd3 (23...Kd8 24.f4 gf4 25.Bf4–/+) 24.Kd2 (better is 24.Qc8 Kf7 25.Be3 Be2 26.Ke2=) 24...Bc4?? (better is 24...f5 25.Qf3 Be4–/+) 25.Bc4+– f5 (25...Kd8 26.Bd5 Bg7+–) 26.Qf5 (26.Qg5 Bh6 27.Qh6 Rh6–/+) 26...Bh6 (26...Kd8 27.Bf7 Bg7+–) 27.Re1 (27.Qc8 Qd8 28.Re1 Kf8 29.Qf5 Kg7 30.Qf7) 27...g4+– 28.Kd1 Qe1 29.Ke1 Bc1 30.Qf7 Kd8 31.Be6 Re8 (31...Rh7 32.Qh7 Bd2 33.Kd2 Ke8 34.Qf7 Kd8 35.Qd7) 32.Qd7 1–0. Fournier,Frederic (1665) – rickmgcxnl(C), Active, 2006.

4.Nf3 Nd7 5.e3 f5 6.d3 g6 7.Nbd2 Bg7 8.Be2 h5 9.0-0 h4 10.g3 h3 11.e4 f4 12.d4 g5 13.de5 de5 14.Nc4 g4 15.Nfe5 Be5 16.Ne5 Ne5 17.c4 f3 18.Be5 fe2 19.Qe2 Qe5 20.f4 Qd4 21.Kh1 Bd7 22.Rad1 Qg7 23.Qd3 0-0-0 24.e5 Nh6 25.e6 Be6 26.Qe4 Rd1 27.Qe6 Kb8 28.Rd1 Rc8 29.Rd7 Qf8 30.Rh7 Nf5 31.Qd5 Nd6 32.c5 Nb5 33.a4 Nc3 34.Qc4 Nd1 35.Rf7 Qe8 36.c6 Qe1 0-1. hidratosugar (1620) - FA9024 (1835), Rated Bullet game, lichess.org.

4.Nf3 e4 5.Nd4 c5 6.Nb3 Nc6 7.b5 Ne5 8.e3 Be6 =.

4.Nf3 f5 5.e3 Nf6 6.Be2 e4 7.Nd4 c5 8.Bh5 g6 9.Be2 cd4 10.Bd4 d5 11.0-0 Bg7 12.c4 0-0 13.Nc3 Nbd7 14.cd5 Qd6 15.Bc4 Nb6 16.Nb5 Qd7 17.Bb6 ab6 18.Qb3 Kh8 19.Rad1 Qe8 20.d3 Bd7 21.Nd6 Qe7 22.Nb7 Ba4 23.Qb1 Qb7 24.d6 Qd7 25.d4 Bd1 26.Rd1 Qd6 27.d5 Ng4 28.Bb5 Qh2 29.Kf1 Qh1 30.Ke2 Qg2 31.Rf1 Qf3 32.Ke1 Ne3 33.Be2 Qe2 34.Ke2 Nf1 35.Kf1 Ra3 36.Qb3 Rb3 37.Kg2 Rd3 38.d6 Rd5 39.b5 Rd6 40.f3 Normal 0-1. joefitz (1765) - abhiganiger (1945), Rated Bullet tournament AS9qEz5s, lichess.org, 2015.

4.Nf3 Qf6 5.e4 Bg4 6.Bb5 c6 (6...Nd7 7.d4=) 7.Be2+= Nh6 8.d4 Bf3 9.Bf3 ed4 (9...Nd7 10.0-0+=) 10.Bd4+/– Qe6 11.0-0 Nd7 12.Nc3 Ne5 13.Be2 Be7 (better is 13...g5!?+/–) 14.f4+– c5 (14...0-0-0 15.Ba7 (15.fe5 de5 16.Ba7 Rd1 17.Rad1 Rd8=+) 15...Nd7 16.f5+–) 15.Nd5 (15.fe5?! cd4 16.Nb5 0-0+/–) 15...0-0-0 16.Ne7 (16.fe5?! cd4 17.Qd4 Kb8 18.Ne7 Qe7 19.ed6 Qd6 20.Qg7 Rhg8+–) 16...Qe7 17.Bb2 (17.fe5?! cd4 18.Qd4 Qe5 19.Qa7 d5+–) 17...Ng6 (17...f6 18.fe5 de5 19.Qe1+–) 18.Bg7 Nf5 (18...d5 19.ed5 (19.Bh8?! de4 20.Qe1 Nh8+–) 19...Rhe8 20.Bb5+– (20.Bh6?! Qe2 21.Bg5 f6 22.Bf6 Rd6+–)) 19.ef5 (19.Bh8?! Ne3 20.Bg4 Kb8+–) 19...Qe3 20.Kh1 Nf4 (20...Rhg8 21.Rf3 Qe7 22.f6+–) 21.Bh8 (21.Bf3 d5 22.Re1 Qf2 23.Bh8 Rh8+–) 21...Rh8 (21...Ne2 22.Bf6 Qh6 23.Qe2 Qf6 24.Qe3+–) 22.Bf3 Kc7 (22...Qe5 23.bc5 Rd8 24.Rb1 dc5 25.Bb7 Kc7 26.Qf3+–) 23.g3 Nh3 (23...Qe5 24.gf4 Qf5 25.Re1+–) 24.Qd5 Rb8 25.Rae1 Qa3 26.Re7 Kb6 (26...Kd8 27.Qd6 Kc8 28.Qc7) 27.Rb7 Ka6 (27...Rb7 28.Qb7) 28.Qd6 1–0. b4_player (2060) – the_show_stealer (1630), GameColony.com, 2002.

4.Nf3 Nf6 5.e3 a5 6.Be2 ab4 7.ab4 Ra1 8.Ba1 Nd5 =.

4.Nf3 Bg4 5.h4 Bf3 6.ef3 Nf6 7.g3 Nc6 8.b5 Nd4 9.c3 Ne6 10.Bg2 Nc5 11.Qe2 0-0-0 12.f4 Re8 13.0-0 ef4 14.Qf3 fg3 15.d4 gf2 16.Rf2 Nce4 17.Rf1 d5 18.c4 Qd6 19.c5 Qg3 20.Nc3 Qf3 21.Bf3 Nc3 22.Bc3 Re3 23.Bd2 Rd3 24.Bg5 Be7 25.Rae1 Kd8 26.Bf6 Bf6 27.Bd5 Bd4 28.Kh1 Bc5 29.Rf7 Rd5 30.Ree7 Be7 31.Re7 Ke7 32.a4 Normal 0-1. CONCEntrado - sasanx (1740), Rated Classical game, lichess.org, 2015.

4.Nf3 h6 5.e3 Nd7 6.Be2 g5 7.0-0 f5 8.d3 Bg7 9.Nbd2 c6 10.Re1 h5 11.e4 g4 12.d4 gf3 13.Nf3 f4 14.c4 Rh6 15.c5 a6 16.cd6 Qd6 17.de5 Qd1 18.Red1 Ne7 19.e6 Bb2 20.ed7 Bd7 21.Rab1 Bg7 22.e5 0-0-0 23.Bc4 Bf5 24.Re1 Bb1 25.Rb1 Nd5 26.Ng5 Nc3 27.Re1 Rd1 28.Kf1 Re1 29.Ke1 Be5 30.Nf7 Bg7 31.Nh6 Bh6 32.Kd2 Bg7 33.Bf7 Kc7 34.Bh5 Kd6 35.Bf3 Ke5 36.Kc3 Kd6 37.Kd3 b5 38.Ke4 Be5 39.g3 fg3 40.hg3 Bb2 41.Kd3 Ba3 42.Kc3 c5 43.bc5 Kc5 44.Bd1 a5 45.f4 b4 46.Kb3 Bc1 47.f5 Bg5 48.g4 Kb5 49.Ka2 Kc5 0-1. hidratosugar (1690) - FA9024 (1770), Rated Bullet game, lichess.org.

4.g3 Nf6 5.Bg2 d5 (5...Nbd7 6.Nf3=) 6.e3 (6.Nf3 e4 7.Nd4 a5=) 6...e4 (6...a5 7.b5+=) 7.d3 (7.f3 Nbd7=) 7...Bg4 8.f3 (8.Ne2 Nbd7+=) 8...ef3–/+ 9.Bf3 Qe3 10.Qe2 Qe2 11.Ke2 Bf3 (11...Nbd7 12.Bg4 Ng4 13.Nc3–/+) 12.Nf3 Be7 (12...Nbd7 13.Re1–/+) 13.Nbd2 (13.g4 0-0 14.g5 Nh5+=) 13...Nbd7 14.Kf2 0-0 15.c4 (15.Rhe1 Rfe8–/+) 15...dc4 (15...Ng4 16.Kg2–/+) 16.Nc4 (16.dc4 Rfe8–/+) 16...Ng4 17.Kg2 Bd6 (17...Rfe8!?–/+) 18.Rhe1+= Rfe8 19.h3 Re1 (19...Ngf6!?+=) 20.Re1+= Ngf6 21.g4 (21.Nd6 cd6 22.Bf6 Nf6=) 21...h6 (21...Nd5 22.Nd6 cd6 23.Kg3+=) 22.Kf2 (22.Nd6 cd6 23.Re7 b5=) 22...Bf8 (22...Nd5 23.Re4+=) 23.Na5 (23.Nd4 Nd5 24.h4 c5 25.bc5 Nc5–/+) 23...Rb8 (23...c5 24.bc5 Nc5 25.Rd1+=) 24.Bd4 (24.Nc4 Nd5+=) 24...b6 (24...c5!? 25.bc5 Bc5+=) 25.Nc6= Ra8 26.a4 (26.Nfe5 Bd6=) 26...a6 (26...Nd5 27.b5+=) 27.Be5 (27.Nfe5 Ne5 28.Be5 Nd5=) 27...Ne5 28.Nfe5 Re8 (28...Nd5 29.Rb1–/+) 29.d4 (29.Nd7! Re6 30.Re6 fe6 31.Ndb8= (31.Nf8?! Kf8 32.Nb8 a5 33.ba5 ba5=)) 29...Bd6 (29...Nd5 30.Rc1+=) 30.Kf3 (30.b5 ab5 31.ab5 Nd5–/+) 30...Nd7 31.Re2 (31.Nd7 Re1 Pinning (31...Re1 Deflection)) 31...Be5 32.de5 g5 (32...a5 33.b5+=) 33.Ke4 (33.b5!? Nc5 34.Rd2+=) 33...f6–/+ 34.Kf5 fe5 (better is 34...Ne5 35.Ne5 fe5 36.Re5 Re5 37.Ke5 Kf8–/+) 35.Nd4? (better is 35.Rd2!? Rf8 36.Ke6+=) 35...Kf7 (35...Rf8 36.Ke6 ed4 37.Kd7–+) 36.Nf3? (better is 36.Nc6!? Rf8 37.Ne5 Kg7 38.Ke6 Ne5 39.Re5–/+) 36...c5 (36...Re6 37.Ke4–+) 37.Rd2 (37.bc5 Nc5 (37...bc5?! 38.Ne5 Kg7 39.Re4–/+) 38.Re5 Rf8–+ (38...Na4?! 39.Re8 Ke8 40.Kg6–/+)) 37...Re7 (37...Ke7!? 38.Ne5 Rf8 39.Ke4 Rf4 40.Kd5 Ne5 41.Ke5 Rb4 42.a5–+) 38.bc5 Nc5 (better is 38...bc5!? 39.Re2 Ke8–+) 39.Ne5–/+ Kg7 40.Rd4 Nb7 (40...Re8 41.Nd7–/+) 41.Rb4?? (better is 41.Rd5–/+) 41...Nd6 0–1. coloplayah (2070) – zekota (2125), net–chess.com, 2006.

5.c4 Nf6 6.d4 e4 7.Nh3 g6 8.Be2 Bg7 9.0-0 0-0 10.Re1 c6 11.f3 (11.Nc3 a5+=) 11...d5= 12.Qb3 Kh8 13.Nc3 Be6 14.Nf4 Bf7 (14...dc4 15.Bc4 Bc4 16.Qc4=) 15.cd5+= cd5 16.Nfd5?? (better 16.Rac1+=) 16...Nd5-+ 17.Nd5 Qd6 18.Bc4 b5! 19.Bb5 Bd5 20.Bc4 Bb7 21.fe4 fe4 (21...Be4 22.b5-/+) 22.Rf1 Nd7 23.Rf8 Rf8 24.a4 (24.Rf1 Rf1 25.Bf1 Bh6-+) 24...Qe7 (24...Nb6!? 25.Be2-+) 25.b5 Qh4 26.g3 Qg5 27.Ba3 (27.a5 Rf3 28.Bc1 Qf5-+) 27...Rf3 28.Re1 Bd4! 29.Bc1 (29.ed4 Qd2 Double attack (29...Rb3 Pinning; 29...Rb3 Deflection; 29...Qd2 Decoy)) 29...Ne5 (29...Be5 30.Bb2-+) 30.ed4 Qc1?? (better 30...Rb3 31.Bg5 Nc4-+) 31.Rc1+- Rb3 32.Bb3 Nd3 (32...Nf3 33.Kf2 Nd4 34.Rc7 Nb3 35.Rb7+-) 33.Rc7 e3 34.Re7 e2 (34...Ne1 35.Rb7 Nf3 36.Kf1 e2 37.Ke2 Nd4 38.Ke3 Nb3 39.Ra7+-) 35.Re2 Nc1 36.Re8 Kg7 37.Bc4 Bf3 38.Re7 Kf6 (38...Kh6 39.d5 Bd5 40.Bd5+-) 39.Ra7 (better 39.Rf7 Kg5 40.Rf3 Kh5+-) 39...Ne2 40.Be2 Be2 41.Rh7 Bc4 42.h4 Kf5 43.Kf2 g5 (43...Ke4 44.b6 Ba6 45.b7 Bb7 46.Rb7 Kd4 47.a5+-) 44.h5 g4 45.Rf7! Kg5 (45...Bf7 46.a5 Passed pawn) 46.Rf4 (better 46.Rc7!? Bd3+-) 46...Kh6 (46...Bb3 47.a5 Bc4 48.b6+-) 47.d5 (47.d5 Bd5 48.a5+-) 1-0. dale70 (2010) - Pterodactyl (2160), Rated Blitz game, lichess.org, 2015.

5.c4 Nf6 6.d4 g6 7.Nf3 e4 8.Ng5 Bg7 9.Qc2 h6 10.Nh3 g5 11.Nc3 c6 12.0-0-0 White prepares d5 (12.d5 Rg8=) 12...0-0 13.d5 Nbd7 14.dc6 bc6 15.Be2 Ne5 16.Rd2 Be6 17.Rhd1 (17.c5 dc5 18.Na4 Nfd7 19.Nc5 Nc5 20.Qc5 Qc5 21.bc5 Nd7-/+) 17...Rfd8 (17...Bc4 18.Rd6 Be2 19.Ne2-/+) 18.Na4 Nfg4 19.f3?? (better 19.c5 d5 20.Rh1-/+) 19...Ne3-+ 20.Qc3 (20.Qb1 Nd1 21.Kd1 Nc4 22.Bc4 Bc4 23.Bg7 Qg7-+) 20...Nd3! 21.Bd3 (21.Rd3 ed3 22.Qd3 Bc4 23.Qd2 Nd1 24.Bc4 d5 25.Bg7 Kg7 26.Ba6-+) 21...Bc3 (21...ed3?! 22.Qg7 Qg7 23.Bg7 Kg7 24.Re1-+) 22.Bc3 (22.Nc3 Nd1 23.fe4 fe4 24.Be4 Nc3 25.Bc3 Bh3 26.Bc6 Qe3-+) 22...Nd1 23.Rd1 ed3 24.Re1 (24.Nb2 a5! 25.ba5 d5 26.Rd3 Qa3-+) 24...Qf7 25.Re6 (25.Nb2-+) 25...Qe6 26.Nb2 Qe2 27.Kb1 Qc2 28.Ka1 Qc3 29.Nf2 d2 (29...a5 30.b5 Qa3 31.Kb1 cb5 32.c5-+) 30.Nfd1 Qc1 (better 30...Qa3 31.Kb1-+) 31.Ka2 Re8 32.Kb3 Re1 33.Nc3 d1Q (33...Re3 34.b5 Qc3 35.Ka2 Qb3 36.Ka1 Re1 37.Nd1 Rd1) 34.Nbd1 Rd1 35.Nd1 (35.c5 Rd3 36.b5 Rc3 37.Kb4 Qa3) 35...Qd1 36.Kc3 (36.Kb2 Qd2 37.Kb3 a5 38.a4 Re8 39.c5 Re3 40.Kc4 Qb4) 36...Re8 37.b5 (37.a4 Re3 38.Kb2 Qd2 39.Kb1 Re1) 37...c5 38.h4 (38.Kb2 Re2 39.Kc3 Qc2) 38...Re3 (38...Re2 39.hg5 Qc2) 39.Kb2 Rb3 40.Ka2 Qb1 0-1. zembelek (2070) - Pterodactyl (2175), Rated Blitz game, lichess.org, 2014.

5.Nf3 Nf6 6.d4 e4 7.Ng5 g6 (7...f4 8.ef4 h6 9.Nh3=) 8.c4 h6 9.Nh3 g5 10.Nd2 Bg7 (10...f4 11.ef4 e3 12.fe3 Bh3 13.fg5 Qe3 14.Qe2 Qe2 15.Be2 Bg2 16.Rg1 hg5 17.Rg2+/-) 11.Qc2 (11.Qb3 Kd8=) 11...0-0 12.0-0-0 (12.Qb3!?=) 12...c6=+ 13.Re1 a5 14.f3 (14.ba5!? Ra5 15.Kd1=+) 14...ab4-/+ 15.ab4 Na6 16.Qb3 White prepares b5 16...c5 (16...Be6 17.Kd1-/+) 17.b5=+ Nb4 (17...Nb8 18.Kd1=+) 18.d5 (18.Kd1 ef3 19.gf3 Re8=) 18...Nd7 19.Nf2 (19.Kd1!?-/+) 19...Bb2 20.Qb2 Ra2 21.Qc3 (21.Qb3 Qf6 22.Re2 Ne5-+) 21...Rc2-+ 22.Qc2 Nc2 23.Kc2 ef3 (23...Nb6 24.fe4 fe4 25.Nfe4-+) 24.gf3-/+ Qg7 (24...Nb6 25.Bd3-/+) 25.Bd3 Ne5 26.e4 (26.f4 Nd3 27.Nd3 Bd7-/+) 26...f4 27.h4 Bd7 (27...g4!? 28.fg4 Bg4 (28...Nd3?! 29.Nd3 Bg4 30.e5=+) 29.Ng4 Ng4-+ (29...Qg4? 30.Reg1+-)) 28.hg5=+ hg5 (28...Qg5?? 29.Reg1+-) 29.Rhg1 (29.Ra1!?-/+) 29...Ra8-+ 30.Rb1? (better 30.Ra1 Ra1 31.Ra1-/+) 30...Ra2 (30...Nd3?! 31.Nd3 Kf7 32.Rb2-/+) 31.Kd1 Rd2! 32.Kd2 Nf3 33.Ke2 (33.Kc2 Ng1 34.Rg1-+) 33...Ng1 34.Rg1 g4 35.Kd2 (35.Nd1 Qd4 36.Re1 g3-+) 35...Qb2 36.Bc2 (36.Ke1 Qc3 37.Kf1 Qa1 38.Kg2 f3 39.Kh2 Qh8 40.Kg3 Qe5 41.Kh4 Qh2 42.Kg5 Qg1-+) 36...g3 (36...Qd4 37.Nd3 Qe3 38.Kc3 Qg1 39.e5 Qd4 40.Kb3 de5 41.Nc1-+) 37.Nd3 Qd4 38.Kc1 (38.Rd1-+) 38...Qg1 39.Kb2 f3 (39...Qd4 40.Ka2 Qc4 41.Bb3 Qd3 42.Ba4 g2 43.Kb2 g1Q 44.Bc2 Qgd4 45.Kb1 Qb4 46.Kc1 Qdd2) 40.e5 de5 41.Ne5 Qd4 (41...Qd4 42.Kb1 f2 43.Nd3 f1Q 44.Bd1 Qd1 45.Nc1 Bf5 46.Ka2 Qa4) 0-1. zembelek (1975) - Pterodactyl (2190), Rated Blitz game, lichess.org, 2014.

5.Nc3 f5 6.b5 Na5 7.Nf3 fe4 8.Ne4 Bf5+=.

5.Nc3 Nf6 6.Bb5 a6 7.Bc4 Be6 8.Nd5 Qd7=.

5.Nf3 f5 6.Nc3 Nf6 (6...fe4 7.Ne4 Nf6 8.Nf6 gf6 9.b5 Nd8 10.Nh4 Rg8; 6...Be6 7.b5 Nd4 8.Nd5 Bd5 9.ed5 Nf6 10.Bc4 Nf3) 7.Bd3 (7.Nd5 Qd8 8.Nf6 gf6 9.b5 Na5 10.Nh4 fe4) 7...f4 (7...fe4 8.Ne4 (8.Be4 Ne4 9.Ne4 d5 10.Ng3 h5) 8...d5 9.Nf6 gf6 10.Nh4= e4) 8.0-0 (8.Nd5 Nd5 9.ed5 Nd4 10.Nd4 ed4) 8...Bg4 (8...Be6 9.Ng5 a6 10.b5 ab5) 9.Nd5 Nd5 (9...Qd7 10.h3 Be6) 10.ed5 Nd4?? (better is 10...Nb8+=) 11.Bd4+– 0-0-0 (11...Qf7 12.Re1 Qd5 13.Be4 Qd4 14.Nd4 Bd1 15.Rad1+– (15.Red1?! ed4 16.Bb7 Rb8 17.Bc6 Kf7+/–)) 12.Re1 (12.Ba7?! e4 13.Be2 ef3 14.Bf3 Bf3 15.Qf3 Qg5+–) 12...Qd7 (12...Kb8 13.Bb2+–) 13.Ba7 b6 (13...b5 14.a4 Kb7 15.ab5 Ra8+–) 14.Ba6 1–0. jasio – zjemtwojchleb, internet, 2011.

5.Nf3 Nf6 6.b5 Nd4 7.Nd4 ed4 8.Bd4 Qe4=.

5.Nf3 Nh6 6.Nc3 Nf7 7.d4 ed4+= 8.Nd4 Nd4 9.Qd4 Nd6? 10.Be2 a6?? 11.Nd5+– (11...Qd8 12.Bh5 Nf7 13.Qc4 Bb4 14.ab4+– (14.Nb4?! 0-0+–)) 1–0. nbh999 (1970) – Klaus Behrmann (2045), ChessWorld.net, 2003.

5.Nc3 a5 6.Nf3 Bg4 7.Be2 Nc6 8.Nd5 Nd5+=.

5.Nc3 Nc6 6.Bb5 Qd7 7.Nge2 a6 8.Bc4 b5=.

5.Nc3 Nc6 6.Bc4 a6 (6...Be6 7.Nd5 (7.Be6 Qe6 8.Nf3 Be7 9.d4 Nd4 10.Nd4 ed4 11.Qd4 c5) 7...Qd8 (7...Qd7 8.Nf6 gf6 9.Be6 fe6 10.Nf3 Rg8 11.0-0 d5) 8.Qe2 Be7 9.Nf3 0-0 10.b5 Na5 11.Nf6 Bf6) 7.Nf3 Bg4 (7...Nd4 8.Nd5 (8.h3 Be6 9.Be6 Qe6 10.0-0 Nf3 11.Qf3 Be7) 8...Nd5 A) 9.Nd4? Nb6 (9...ed4?! 10.Bd5 c6 11.Bb3+=) 10.Bd3 Na4–+; B) 9.Bd5= c6 10.Bc4 Bg4 11.Bd4 ed4) 8.h3 (8.Nd5 Nd5 9.Bd5 Nd8= (9...Qf6 10.h3 Bf3 11.Qf3 Qf3) 10.h3 Bh5 11.0-0 c6) 8...Bf3 (8...Bh5 9.Nd5 (9.0-0 Qd7 10.Bd3 Nd4 11.Be2 Ne2) 9...Nd5 10.Bd5= (worse is 10.ed5 e4 11.g4 ef3 12.Kf1 Ne5 13.Be5 de5 14.gh5 Qh4–+) 10...Qf6 11.0-0 Qf4) 9.Qf3 Nd4 10.Qd3 (10.Qd1 c6= (10...g6 11.0-0 Bh6) 11.0-0 0-0-0) 10...b5 (10...c6 11.f4+= (11.0-0 b5) 11...g6) 11.Ba2 0-0-0? (better is 11...c6!?=; 11...c5+/–) 12.a4 c6 13.ab5 ab5 14.0-0 (14.Bf7 Qf7 15.Ra8 Kb7 16.Rd8+/–) 14...Kc7 (14...d5 15.ed5 Qb4 16.Rfb1+/–) 15.Ne2 (15.Bf7!? Rd7 16.Ba2 Nh5+–) 15...Ne2+/– 16.Qe2 h5 (better is 16...Rb8+–) 17.Bf7! Qf7?? (17...Rb8 18.Bb3 Kd8+–) 18.Ra7 (18.Ra7 Kc8 19.Rf7+–) 1–0. Trokenheim,Marek (2175) – Kaeser,Werner (1905), remoteschach.de, 2010.

5.Nc3 Nc6 6.Nf3 g6 7.Nd5 (7.Be2 Bh6 8.Nd5 Qd8 9.b5 Nd5 10.ed5 Ne7 11.Bc4 0-0) 7...Nd5 8.ed5 Nd4 9.Nd4 ed4 10.Qe2 Bg7 11.Qe7 Ke7 12.0-0-0.

5.Nc3 Qd7 6.Nf3+= Be7 7.d4 h6? (better is 7...Nc6+=) 8.de5+– de5 9.Ne5 Qd1 10.Rd1 0-0 11.Bc4 Nc6 (11...Nbd7 12.Ng6 Re8 13.Ne7 Re7 14.f3+–) 12.Nc6 bc6 13.e5 Nh5 (13...Ng4 14.Ne2 Be6 15.Be6 fe6 16.Bd4+–) 14.Be2 Nf4 15.Bf3 Ba6 (15...Bf5 16.Bc6 Rad8 17.g3+–) 16.Bc1 Rab8 (16...Ng6 17.Bc6 Rad8+–) 17.Bf4 g5 (17...Bb7 18.Rd7 Rfe8 19.Kf1+–) 18.Be3 f6 (18...Rfd8 19.Rd8 Rd8 20.Bc6+–) 19.Rd7 Bd8 20.Ba7 Rb7 (20...Ra8 21.Bc5 Bc8 22.Rd2+–) 21.Bc5 Re8 22.Bc6 Re5 (22...Rb8 23.Kd2 fe5 24.Bd5 Kh8 25.Bf7+–) 23.Kd2 Rb8 24.Ba7 Rc8 25.b5 Bb5 26.Nb5 Rc5 (26...Re7+–) 27.Bc5 Be7 28.Bd5 Kf8 29.Re7 Rd8 30.Rc7 Ke8 (30...Rd6 31.Re1 f5 32.Bd6#) 31.Re1 1–0. b4_player (2215) – idlethreat7984, GameColony.com, 2003.

5.Nc3 Nbd7 6.Nf3 Nb6 7.Be2 Bd7 8.0-0 Na4=.

5.Nc3 Be6 6.Nf3 Nbd7 7.Be2 d5 8.Nb5 Kd8=.

5.Nc3 g6 6.Bc4 Be6 (6...Nbd7 7.Nf3 Nb6 8.Be2=) 7.Qe2 (7.Be6 fe6 8.Nf3 Bg7=) 7...a6 (7...Bg7 8.Nf3+=) 8.h3 (8.Nf3 Bg7+=) 8...b5 (better is 8...Bg7=) 9.Bb5?? (better is 9.Be6 fe6 10.a4+=) 9...ab5–+ 10.Qb5 Nbd7 (10...c6 11.Qd3–+) 11.Qb7 (11.Qc6 Qd8+=) 11...Qd8 (11...Nb6 12.d4 Bc8 13.Qc6 Qd7 14.Qd7 Bd7 15.d5–+) 12.Nf3 (better is 12.Qc6–/+) 12...Bc4 (better is 12...c5–+) 13.Qc6= Be6 14.0-0 (14.Qb7 c5–+) 14...Bh6 15.Rfd1 (15.Nb5 Rc8+=) 15...0-0–/+ 16.d4 Nb6 (16...ed4 17.Nb5 Ne5 18.Qc7 Qc7 19.Nc7+=) 17.de5 Bd7 (17...Nc4 18.ef6 Nb2 19.Rd4+=) 18.Qb7= Nc4 19.ef6 Nb2 20.e5?? (better is 20.Rd4 Rb8 21.Qa7=) 20...Nd1–+ 21.Rd1 Bf4 (21...Ra3 22.Nd5–+) 22.Nd5–/+ Be5 (22...de5 23.c4–/+) 23.Ne5 de5 24.c4 (24.Qc7 Kh8–/+) 24...Kh8 (24...Ra3 25.Ne7 Kh8 26.Qd5–/+) 25.Ne7 (25.Nc7 Rb8 (worse is 25...Ra3 26.Nb5 Rb3 27.Qd7 Qf6 28.Qd2+=) 26.Qa7 Qc8–/+) 25...Ra3 (25...Bc6 26.Rd8 Bb7 27.Rd7–/+) 26.Qe4? (better is 26.Qd5!? e4 27.Qd7–/+) 26...Ra6 (26...Qe8 27.Qe5 Bf5 28.Qc7–/+) 27.Qh4 Rd6 (better is 27...h5–+) 28.Re1? (28.Rd6 cd6 29.Qh6 Rg8 30.Ng8 Qg8+=) 28...Rd4 (better is 28...Ba4!? 29.Re5 Rd1 30.Kh2–+) 29.Qh6 Rg8! 30.Re5 (30.Ng8 Qg8 Combination) 30...Qf8 (30...Be6–/+) 31.Qc1 (31.Ng8 Kg8 (31...Qg8?! 32.Ra5 Bc8 33.Ra8=) 32.Qf8 Kf8–/+) 31...Rh4 (31...Be6 32.Qe3 Rc4 33.Ng8 Qg8 34.b5–+) 32.b5–/+ Rh5 (32...Be6 33.c5–/+) 33.Re2 (better is 33.Rh5 gh5 34.Ng8 Qg8 35.Kh2+=) 33...Qh6?? (better is 33...Be6–/+) 34.Qh6+– Rh6 35.Ng8 Kg8 36.Re7 g5 37.Rd7 Rf6 38.Rc7 Rb6 39.Rc6 (39.Rc5 f6+–) 39...Rb8 40.b6 Kf8 (40...Kg7+–) 41.c5 Ke7 (41...Kg7 42.Rc7 Kf6 43.b7+–) 42.Rc7 Ke6 43.b7 Kd5 44.c6 Kd6 45.Rc8 1–0. verns2 (1610) – campocebe, internet, 2010.

4.c4 d6 5.Nc3 (5.e3 Nf6+=) 5...Nf6 6.e3 g6 7.Nf3 Bg7 8.Nd5 Nd5 9.cd5 b6 (9...0-0 10.Qc2+=) 10.Qa4+– Bd7 11.Qc2 0-0 (better 11...c5 12.bc5 bc5+–) 12.Qc7+– e4 (12...Qd8 13.Qb7 (13.Qd6?! Rf6 14.Qe5 Rf7+=) 13...b5 14.Bb5 (worse 14.Qa8 Qb6+–) 14...Bb5 15.Qb5+– (15.Qa8?! Qb6 16.Rc1 Bd7=)) 13.Bg7 Qg7 14.Nd4 Ba4 (14...f4 15.Qd6 fe3 16.de3+–) 15.Qg7 (worse 15.Qd6 Nd7+–) 15...Kg7 16.Ne6 Kf7 17.Nf8 Kf8 18.Rc1 Nd7 19.Ba6 Rb8 (19...Nf6 20.Ke2+–) 20.Rc7 Ke7 (20...Ne5 21.Ra7 Bb3 22.0-0+–) 21.Ra7 b5 (21...h6 22.Bb7 Kf6 23.Bc6 Bc6 24.dc6+–) 22.0-0 Bb3 (22...Rd8 23.Rc1 Kf6 24.Rb7+–) 23.Rc1 Bd5 (23...Bc4 24.a4! g5 25.ab5 Bb5 26.Bb5 Rb5 27.Rcc7 Rd5 28.Rd7 Kf6 29.Rh7+–) 24.Bc8 Be6 25.Rcc7 Rc8 26.Rc8 d5 (26...h6+–) 27.Rh8 Kd6 28.Ra6 Ke7 29.Rh7 (29.Rh7 Bf7 30.Ra7+–) 1–0. Pierre – Waldorffy, internet, 2020.

4.d4 e4 5.e3 Nf6 6.c4 g6 7.Be2 Bg7 8.h4 h6 (8...0-0 9.Nc3 a5 10.b5+=) 9.h5 (9.Nh3!?+/-) 9...g5+= 10.g4 (better 10.Nc3!?+=) 10...f4 11.Nd2 f3 12.Bf1 (12.Ngf3 ef3 13.Bf3 0-0-/+) 12...Ng4 (better 12...d6!?-+) 13.Qc2-/+ Nf6 14.Ngf3? (better 14.c5!? 0-0 15.Bc4 Kh8 16.Nh3=+) 14...ef3-+ 15.Nf3 d6 16.Bd3 Bg4 17.Bg6 Kd8 18.Nd2 Nbd7 19.e4 (19.c5-+) 19...d5?? (better 19...Kc8-+) 20.f3 (20.cd5? Nd5 21.f3 Bf5-+) 20...Be6 21.e5 Bg8 (21...Ne8 22.cd5 Bd5 23.0-0-+) 22.0-0-0 Ne8 23.Rhf1 c6 24.f4 gf4 25.Rf4 Nc7 26.Rdf1 Ne6 27.Rf5 (27.Rg4 Ng5 28.Bf5 Rc8-+) 27...Nb6 (better 27...Ng5!?-+) 28.c5-/+ Nd7 29.a4 (29.b5 cb5 30.Qb3 Kc8-/+) 29...a6 (29...Ng5 30.Nf3 Nf3 31.R5f3-+) 30.a5 (30.Nf3!?-/+) 30...Kc7-+ 31.Nf3 Rf8 32.Ne1 Rf5 33.Qf5 Nef8 34.Ng2 (34.Bf7 Bf6! 35.Bg8 Bg5 36.Kc2 Rg8-+) 34...Be6 35.Qf4 (35.Qf2 Ng6 36.hg6 h5-+) 35...Qg5 (better 35...Ng6 36.Qg3 Ngf8-+) 36.Nh4 Qf4 (36...Ng6!? 37.Ng6 Rh7 38.Qd2-+) 37.Rf4 Ng6 38.Ng6 Rg8 39.Kc2 Bf8 (better 39...Kd8!? 40.Bc1-+) 40.Bc1 Bg7 41.Kd3?? (41.Bb2 Kd8 42.Bc1-+) 41...Nf8?? (better 41...Kd8-+) 42.Ne7=+ Rh8 43.Be3? (better 43.Nf5 Bf5 44.Rf5=+) 43...Kd7-+ 44.Nf5 Bf5 45.Rf5 Ke6 46.Rf2 Nd7 (better 46...Ke7-+) 47.Rg2-/+ Bf8 48.Rg6 Ke7 (better 48...Kf5-/+) 49.Bf2+= Rh7 50.Bh4 Ke8 51.Re6 (better 51.e6+=) 51...Be7-+ 52.Ke3?? (better 52.Be7 Re7 53.Rh6=+) 52...Nf8 53.Re7 Re7 54.Be7 (54.Bf6 Ne6 55.Bh4 Rg7-+) 54...Ke7 55.Kf4 Ke6 56.Kg4 Nh7 (56...Kf7!? 57.Kf3-+) 57.Kf4 Ng5 58.Kg4 Ne4 59.Kf4 Nc3 60.Ke3 Na2 (better 60...Nb5 61.Kd3-+) 61.Kd3 Nb4 (better 61...Nc1 62.Ke3 Kf7-+) 62.Kc3-/+ Na2 63.Kb2 Nb4 64.Kc3 Na2 65.Kb2 Nb4 (better 65...Kf5-+) 66.Kb3?? (better 66.Kc3 Kf5 67.Kb4-/+) 66...Nd3-+ 67.Kc3 Nf4 68.Kd2 Nh5 69.Ke3 Ng7 70.Kf4 h5 71.Kg5 Kf7 72.Kh4 Ne6 73.Kh5 Nd4 74.Kg5 Ne6 75.Kf5 Nc5 76.e6 (76.e6 Ke7 77.Ke5-+). dale70 (2025) - Pterodactyl (2080), Rated Blitz game, lichess.org, 2015.

4.e3 d6 5.d4 Nf6 6.de5 de5 7.Nf3 Nbd7 8.c4 (8.Bc4 Qd6+=) 8...g6 (8...c5 9.Bc3=) 9.Qb3 (9.Nc3 a6+=) 9...Bg7 10.Nc3 0-0 (10...e4 11.Nd4=) 11.0-0-0 (11.c5!? Kh8 12.Ng5+=) 11...e4 (11...a5 12.Nd5 Nd5 13.cd5=+) 12.Nd4 Ne5 13.Ndb5 (13.Nd5 Nd5 14.cd5 Kh8=) 13...a6 14.Nd4 Nfg4 (14...Rd8 15.Rd2=+) 15.Rd2 c6 16.c5 Kh8 17.h3 (17.Na4 f4 18.ef4 Rf4=) 17...Nf6 18.Na4 Nd5 Black prepares the advance f4 19.Bc4 (19.h4 Rd8=) 19...Nc4 20.Qc4 f4 21.ef4 Nf4 22.Nb6 Rb8 23.g3 (23.Kb1!?=+) 23...Nd3-/+ 24.Rd3 (24.Kb1!?-/+) 24...ed3-+ 25.Qd3 Bf5 (better 25...Rf2 26.Bc3 a5-+) 26.Qd2?? (26.Qe3 Qf6-/+) 26...Rbd8 (better 26...Qe4 27.Nf5 Qh1 (27...gf5? 28.Bg7 Kg7 29.Re1+-; worse 27...Qf5 28.Nd7+=; 27...Rf5?! 28.Re1 Qf3 29.Nd7=) 28.Kc2 Qe4 29.Kc1 Rf5-+) 27.Nc4?? (better 27.Re1 Qc7 28.Nf5 Rf5 29.Bg7 Kg7 30.Qc3 Kg8 31.f4=+) 27…Qe4-+ (27...Qe4 28.Qc2 Qh1 29.Qd1 Qd1 30.Kd1 Bd4-+) 0-1. diotarolo (2055) - Pterodactyl (2205), Rated Blitz game, lichess.org, 2014.

4.e4 fe4 5.Qh5 Kd8 6.Qe5 Qe5 7.Be5 d5 =.

4.e4 fe4 5.Qh5 Qf7 6.Qf7 (better 6.Qe5!? Qe6 7.Qc7+/-) 6...Kf7= 7.Be5 d6 8.Bb2 Be6 (8...Nf6 9.Nc3 d5 10.f3=) 9.c4 (9.Nc3!? Nf6 10.f3+=) 9...Nf6 10.h3? (10.Nc3!?=+) 10...Nbd7 11.Nc3 h6 (11...Ne5 12.Nb5 Bc4 13.Nc7 Bf1 14.Kf1-/+) 12.d4? (12.Nb5!? c5 13.Nc7=) 12...c6 (12...ed3 13.Nf3 Bc4 14.0-0-0-/+) 13.0-0-0 Be7 14.Re1 Bf5 (14...a5 15.ba5 d5 16.f3-/+) 15.g4 Bh7 16.Bg2 Pawn e4, live or die! 16...d5 17.f3 ef3 (17...Rhe8!?=+) 18.Nf3= Rhe8 (18...dc4!? 19.Rhf1 Ke8=) 19.Ne5+= Kg8? (better 19...Ne5!? 20.de5 Ne4 21.Ne4 Be4 22.Be4 de4 23.Re4 Ke6+=) 20.cd5+- Ne5 21.de5 Nd5 22.Nd5 cd5 23.Bd5 Kh8 24.Re3?? (better 24.Bc3 Rf8 25.Rhf1+- (25.Bb7?! Rab8 26.Ba6 Rf2+=)) 24...Bg5-+ 25.Kd2 (25.Bc3 Be3 26.Kb2 Rad8-+) 25...Rad8 26.Ke2 Be3 (26...Rd5 27.a4-+) 27.Ke3 (27.Rd1 Bf4 28.Bb7 Rd1 29.Kd1 Be5 30.Be5 Re5-+) 27...Rd5 28.Rc1 (28.Re1 Rd3 29.Kf2 Rh3-+) 28...Red8 (better 28...Rd3 29.Ke2 Red8-+) 29.Rc7 (29.Rc3-+) 29...Rd3 30.Ke2 Rd2 31.Ke3 R8d3 32.Kf4 g5 (32...Rf2) 0-1. dale70 (2065) - Pterodactyl (2085), Rated Blitz game, lichess.org, 2015.

5.Nf3 d6 6.e3=.

5.g3 g6 6.Bg2 (6.Nc3 Bg7 (6...d6 7.Bg2 Bh6 8.Nd5 Nd5 9.cd5 0-0 10.Rc1 a5 11.b5 a4; 6...Bh6 7.Nf3 0-0 8.Nd5 Nd5 9.cd5 d6 10.Rc1 c6 11.dc6 Nc6; 6...Kf7 7.Nf3 d6 8.Bg2 Bh6 9.0-0 Kg7 10.Nd5 Nd5 11.cd5 Bd7) 7.Nh3 Nc6 8.Bg2 a5 9.0-0 ab4 10.Nd5 Nd5 11.cd5 Nd4; 6.Nf3 e4 (6...Bg7 7.Nc3 0-0 8.Qb3 e4 9.Ng5 h6 10.c5 Kh8 11.Nh3 g5; 6...d6 7.Nc3 Be6 8.Bg2 Nc6 9.Ng5 Bc4 10.Qa4 e4 11.d3 Bd3) 7.Nd4 Bg7 8.Nc3 0-0 9.Qb3 Nc6 10.Ncb5 Nd4 11.Nd4 d6) 6...Bg7 (6...Nc6 7.Nc3 Bg7 8.Nh3 a5 9.0-0 Nd4 10.Nb5 Nb5 11.cb5 ab4; 6...Bh6 7.Nc3 a5 8.b5 d6 9.Nf3 0-0 10.0-0 Nbd7 11.d3 Nc5) 7.Nc3 (7.Nh3 Nc6 8.0-0 a6 9.Nc3 0-0 10.Nd5 Nd5 11.Bd5 Kh8) 7...a5 (7...0-0 8.Nh3 Nc6 9.0-0 a6 10.c5 d6 11.Ng5 Be6) 8.b5 'White gets more space' 8...d6 (8...0-0 9.Qb3 e4 10.Nh3 d6 11.Nf4 Nbd7) 9.Nf3 0-0 (9...Nbd7 10.0-0 0-0 11.Ng5 Nc5) 10.0-0 Nbd7 11.Qc2 (11.Ng5 Nc5) 11...Ra7 (11...Rb8; 11...Nb6=) 12.a4 b6 13.Nd5 (13.d3 Bb7=) 13...Nd5 14.cd5 'White has new doubled pawns: d2+d5. Black has a new backward pawn: c7' 14...Nf6 (14...Bb7 15.Qc4=) 15.d3 'Controls e4' 15...Bb7 (15...f4 16.e4=) 16.e4 '+/=' 16...Nh5 (16...Bh6 17.Ra3+=; 16...Nd7 17.Ba3 Nc5 18.Nd2) 17.Rac1 Rf7 18.Rce1 fe4 19.de4 Bh6 20.Nd2 Bc8 21.Nc4 Bg4 22.f3 Bd7 23.Qc3 Ng7 '?' (better is 23...Bg7+/– 24.Qd2) 24.f4 '+–' 24...ef4 25.e5 fg3 '?' (25...Bf5 26.ed6 Qd8 27.dc7 Rac7 28.d6+–) 26.Rf7 Qf7 27.hg3 Bf5 (27...Qf5+– is the last straw) 28.ed6 cd6 (28...Qf8 does not win a prize 29.Re7 g5 30.Qe1+–) 29.Nd6 Qc7 (29...Bd2 a last effort to resist the inevitable 30.Qd2 Qc7+–) 30.Re8 '!' 'Deflection: g7' 30...Ne8N 31.Qh8 1–0. Miralles,Gilles – Prie,Eric, St Maxime, 1983.

5.d4 d6 6.Nc3 Nf6 7.de5 de5 8.Nf3 =.

5.d4 d6 6.e3 Nf6 7.Nf3 ed4 8.Bd4 =.

5.d4 d6 6.e3 Bg7 7.Nc3 (7.Be2 ed4 8.Bd4 Nf6=) 7...Nd7 (7...Nf6 8.de5 de5 9.Nf3=) 8.de5 (8.Nf3 e4 9.Nd2 Ngf6+=) 8...Ne5 (8...de5 9.Nf3+=) 9.f4= Ng4 10.Nd5 Qf7 (10...Qd7 11.Bg7 Qg7 12.Qd4 Qd4 13.ed4+=) 11.Bg7+= Qg7 12.Qd4 Qd4 13.ed4 Kd7 (13...Kd8 14.Nf3+=) 14.Bd3 b5 (14...N8f6 15.Nf6 Nf6 16.Kf1=) 15.c5 (15.h3 bc4 16.Bc4 N4f6+=) 15...a6 (15...c6 16.h3 N4f6 17.Ne3=) 16.h3 N4f6 17.Ne3 Bb7 18.Kf2 (18.a4 Re8 19.Kd2 dc5 20.dc5 Ne4 21.Be4 Re4 (worse is 21...Be4 22.Ne2+=; worse is 21...fe4 22.ab5 ab5 23.Ne2+/–) 22.ab5 ab5+=) 18...Be4 19.Be2 Re8 (19...Ne7 20.Nf3=) 20.a4 Bb7 (20...Bc6 21.ab5 ab5 22.Bd3=) 21.ab5+= Ne4 22.Ke1 ab5 23.Bb5 c6 (23...Bc6 24.Bc6 Kc6 25.Ne2+=) 24.Ra7 Kc8 25.Ba6 Ng3? (25...Ba6 26.Ra6 Kb7+=) 26.Bb7 (26.Bb7 Kc7 27.Ba6 Kb8 28.Rb7 Ka8 29.Kd2 Re3 30.Ke3 (30.cd6?! Re6=) 30...Nh1 31.Rg7+– (31.cd6?! Nf6+–)) 1–0. Woelfelschneider,Peter – Pleschke,Helmut, SEV, 2001.

5.d4 Bg7 6.Nc3 White launches an attack 6...Nf6 7.de5 Qe5 8.Qb3 (8.Nf3 Qe7+=) 8...Qe6 (better is 8...Ne4!? 9.Nd1 Qe7=) 9.Nd5+/– Na6? (better is 9...Kd8+/–) 10.b5+– c6 (10...0-0 11.ba6 Qa6 12.Nf3+–) 11.ba6 cd5 12.ab7 Rb8 (12...Bb7 13.Qb7 0-0 14.cd5 Nd5+–) 13.bc8Q Rc8 14.cd5 Qd6 15.Nf3 0-0 16.Be5 Qc5 (16...Qd5 17.Qd5 Nd5 18.Rd1+–) 17.e3 (17.d6 Nd5 18.Bg7 Kg7+–) 17...d6 (17...Nd5 18.Bb5 Rb8 19.a4+– (19.Bb8?! Rb8 20.Rb1 a6+–)) 18.Bd4 Qc7 19.Be2 Qc1 (19...Ne4+–) 20.Rc1 Rc1 21.Bd1 Rfc8 22.0-0 Ne4 23.Bg7 (23.Ba7 R1c3 24.Qa4 Ra8+–) 23...Kg7 24.Nd4 Kh6 (24...Kg8 25.Nc6 Re8 26.Qb7+–) 25.Ne6 Nd2 (25...Nc5 26.Qb4 Ne6 27.de6 R1c4 28.Qd6 a5+–) 26.Qb2 R8c3 27.Qd2 1–0. Buczinski,Henryk – Kowalik,J, Siemianowice Slaskie Poland, 1992.

5.c4 d5 6.Nf3 e4 7.Nd4 c6 (7...a5 8.cd5 Nd5 9.Nc3+=) 8.cd5+= cd5 9.Be2 Nc6 10.0-0 Qd6 11.Nb5 Qd8 12.Bf6 gf6 13.Bh5 Ke7 14.d3 a6 15.N5c3 Be6 16.Ne2 Bh6 17.Nbc3 Bf7? (17...Rg8 18.d4+=) 18.Ng3 (18.Bf7 Kf7 19.Ng3 Ne7 20.Qh5 Kg7 21.de4 fe4+-) 18...Bg6 (better 18...Be6!?+=) 19.Qb3+- d4 20.Nd5 Kf8 21.de4 fe4 22.Bg6 hg6 23.Ne4 f5 24.Nc5 Qd6 25.h3 Bg7? (better 25...Rh7+-) 26.Nb7 Qd7 27.Nc5 Qd6 (27...Qf7 28.Rac1 de3 29.Nc7 ef2 30.Rf2+-) 28.Nc7! Rc8 (28...Qc7 29.Ne6 Double attack (29.Ne6 Decoy)) 29.Qe6 (better 29.N7e6 Ke7 30.Ng7+-) 29...Qe6 30.N7e6 Kf7 31.Ng7 Kg7 32.ed4 (32.Na6 de3 33.fe3 Rhe8+-) 32...Nd4 33.Rad1 Ne2 34.Kh2 Nf4 (34...a5 35.Rd7 Kh6 36.Re1 ab4 37.ab4+-) 35.Rd4 (35.Na6?! Rc3 36.Rfe1 Ra3+-) 35...g5 36.Re1 (36.Na6 Rc2 37.Nc5 Kf6+-) 36...Rhe8 (36...Rc6 37.Rd7 Kf6 38.f3+-) 37.Red1 (37.Rd7 Kf8 38.Re8 Re8+-) 37...Re7 (37...Re2 38.Rd7 (38.Na6?! Rf2 39.R4d2 Rc2 40.Rc2 Rc2+/-) 38...Kg8 39.R7d2+- (39.Na6?! Rf2 40.R7d2 Rc2 41.Rc2 Rc2+/-)) 38.Rd7 (worse 38.Na6 Rc2 39.R1d2 Re2 40.Re2 Re2+-) 38...Rce8 39.Na6 Ne2 (39...Rd7 40.Rd7 Kf6 41.g3+-) 40.Re7 (better 40.Nc7 Kg8 41.Ne8 Re8+-) 40...Re7 41.Nc5 Nc3 42.Rd3 Nb5 (42...Ne4 43.Ne4 fe4 44.Rb3+-) 43.a4 Nc7 (43...Na7 44.b5+-) 44.b5 Kf6 (44...Na8 45.Rd6+-) 45.b6 Na8 (45...Kf7 46.Rb3 f4 47.b7+-) 46.b7 Nb6 (46...Rb7 47.Nb7 Nc7+-) 47.b8Q (47.b8Q Kg7 48.Rd8 Nc4 49.Rh8 Kf6 50.Rh6 Kf7 51.Qh8 Re5 52.Qf6 Ke8 53.Rh8) 1-0. BeepBeepImAJeep - carlosh99 (2065), lichess.org, 2016.

5.c4 d6 6.Nc3 Nc6 (6...a5 7.Qa4 Qd7 8.Qd7 Bd7 9.b5=) 7.d3 g6 8.Nf3 Bg7 9.Be2 Be6 10.0-0 Nd8 11.Nd2 (11.d4 Nf7+=) 11...0-0= 12.Bf3 c6 13.g3 (13.b5 d5=) 13...Nf7 14.Qe2 Rad8 15.Bg2 Rfe8 16.Rfe1 Qd7 17.b5 h6 18.a4 d5 19.cd5 cd5 20.d4 ed4 21.ed4 Ne4 22.Nb3 Rc8 (22...Nfd6 23.Rac1=+) 23.Rac1 b6 24.f3 Ned6 25.Qd3 Nc4 26.Ba1 Nfd6 27.Re2 Bf7 ½–½. Seifert – Ziese,Gerhard, corr SOK–89–48, 1989.

5.c4 d6 6.Nf3 Be6 7.Be2 Nbd7 8.0-0 h6 9.Nc3 g6 10.Nb5 a6?? (better is 10...Nb6 11.d4 Nc4 12.de5 de5 13.Be5 Ne5 14.Ne5 Rg8+/–) 11.Nc7+– Kf7 12.Na8 Bg7 (12...Qd8 13.d4 e4 14.d5 Bd5 15.Nd4+–) 13.Nc7 Rc8 14.Ne6 Qe6 15.Rc1 g5 16.d4 e4 17.d5 Qe7 18.Nd4 Ne5 (18...f4 19.Nf5 Qf8 20.ef4 gf4 21.Qd2+–) 19.Nf5 Qf8 20.Be5 0–1. ramoschessbrasil (2480) – alexp (2255), net–chess.com, 2011.

5.c4 g6 6.d4 ed4 7.Bd4 Bg7 8.Nf3 Nc6 9.Be2 Nd4 10.Nd4 (10.ed4 a5 11.b5 0-0=) 10...0-0 11.Ra2 (11.c5 d6 12.cd6 Qd6 13.Qb3 Kh8=) 11...d6 (11...a5 12.Nc3=) 12.0-0 (12.Nc3 a5=) 12...Ne4 13.Nf3 (13.Qb3 f4=) 13...Be6 14.Rc2 (14.Nd4 a5=+) 14...Rad8 (14...a5 15.Nd4=+) 15.Qc1 (15.Nd4 Bf7=+) 15...Bf7 (15...a5 16.Nd4=+) 16.Rd1 Rfe8 17.Nbd2? (better is 17.Rd3=+) 17...Nf2!–+ 18.Rf1? (18.Kf2 Qe3) 18...Ng4 19.Re1 (19.Kh1 Ne3 20.Re1 Nc2 21.Qc2–+) 19...Qe3 20.Kh1 Nf2 21.Kg1 Nh3 22.Kh1 Qg1! 23.Rg1 (23.Ng1 Nf2) 23…Nf2 0–1. Frenzel,Lothar – Bothe,E, corr sok, 1997.

5.Bc4 d6 6.Nf3 Nc6 7.0-0 g6 8.Nc3 Nd8 9.d3 (9.d4 e4 10.Nd2 Bg7+=) 9...c6 10.Nd2 (10.e4 Be6 11.Be6 Ne6 12.ef5 gf5=) 10...Bg7 11.Ne2 Be6 12.Be6 Ne6 13.c4 Ng5 (13...0-0 14.Qc2=) 14.Qb3 0-0 15.f3 Rae8 16.e4 Nf7 (16...Bh6 17.c5 Nf7 18.f4 ef4 19.Bf6 Qf6 20.Rad1=+). Kross – Ziese,Gerhard, corr SOK–89–48, 1989.

5.d4 e4 6.c4 d6 7.Nc3 c6 8.Nge2 g6 9.d5 Bg7 10.Nf4 0-0 11.Qb3 Kh8 12.0-0-0 Nbd7 13.dc6 bc6 14.h3 a5 15.b5 Nc5 16.Qa2 g5 17.Nfe2 Nd3 18.Rd3 ed3 19.bc6 de2 20.Be2 Ne4 21.Nd5 Bb2 22.Qb2 Qg7 23.f3 Qb2 24.Kb2 Ng3 25.Re1 Rb8 26.Kc3 Be6 27.Bd1 Rfc8 28.Ba4 Kg7 29.e4 fe4 30.fe4 Nh5 31.e5 de5 32.Re5 Bf7 33.Rg5 Kh6 34.Rf5 Kg7 35.g4 Ng3 36.Re5 Rb1 37.Re7 Kf8 38.Rb7 Rc1 39.Kd4 Ne2 40.Kc5 Nc3 41.Nc3 Rc3 42.Bb5 Ra3 43.h4 a4 44.h5 Rc3 45.g5 a3 46.Ra7 Bh5 47.Rh7 a2 48.Ra7 Rc2 49.Kd6 Bg6 50.Kd7 Bf5 51.Kd6 Rd2 52.Ke5 Rd1 53.Kf5 a1Q 54.Ra1 Ra1 55.Ke6 Rc1 56.Kd7 Ra8 57.c7 1-0. zembelek (2025) - Pterodactyl (2170), Rated Blitz game, lichess.org, 2014.

5.Nf3 d6 6.Nc3 g6 (6...d5 7.d4 e4 8.Ne5=) 7.d4 (7.Bc4 Be6 8.Be6 Qe6+=) 7...Bg7 (7...e4 8.Nd2=) 8.de5+= de5 9.Bc4 a5 10.b5 Nbd7 (10...e4 11.Ng5+=) 11.Ng5 h6 12.Ne6 Nb6 13.Ng7 Qg7 14.Bb3 (14.Ba2 Bd7+=) 14...Bd7 (14...a4 15.Ba2+=) 15.a4 (15.Na4 Na4 16.Ba4 Qe7=) 15...0-0-0= 16.Qf3 Kb8 (16...g5 17.Rd1=) 17.0-0 Bc8 (17...Qe7 18.Ba3 Qg7 19.Rad1+=) 18.Rfd1 (18.Rad1 Qe7+=) 18...Qe7 19.Qg3 (19.Ba3 Rd1 20.Qd1 Qd7+=) 19...g5= 20.Ba3 (20.Ne2 f4 21.Rd8 Rd8 (worse is 21...Qd8 22.ef4 ef4 23.Qc3+/–) 22.ef4 gf4+=) 20...Rd1 21.Nd1 Qe8 22.Bb2 Nbd7 23.f3 Qe7 24.Ba3 Qe8 25.Qe1 (25.Nb2 f4 26.Qe1 b6+=) 25...b6 26.c4 (26.e4 fe4 27.fe4 Qh5=) 26...e4 (26...Qf7 27.Nc3=) 27.f4 (27.c5 Qe5 28.Rc1 ef3 29.cb6 cb6+=) 27...gf4 (27...Bb7 28.c5 Bd5 29.cb6 cb6 30.Bd5 Nd5 31.Bd6 Ka8 32.Nc3=) 28.ef4 Qg6 29.Ne3 (29.c5 Nh5 30.Qe3 Rd8 31.cb6 Qb6+=) 29...Ng4 (29...Nh5 30.Qf2=) 30.Nd5 (30.c5 Ne3 31.Qe3 Rd8+/–) 30...Bb7= 31.h3 (31.Rd1 Qh5 32.h3 Ngf6+=) 31...Ngf6 32.Ne3 Nh5 33.Qf2 Ndf6 (33...Rd8 34.c5 Nc5 35.Bc5 bc5 36.Rc1=) 34.c5 (34.Rd1 Ng3+=) 34...Rd8 35.cb6 cb6 36.Nf5! Ka7 (36...Qf5 37.Qb6) 37.Ne3 Qg3 (37...Nd5 38.Bd5 Bd5 39.Rd1+/– (worse is 39.Nd5 Rd5 40.Qc2 Rd3+=)) 38.Qg3 Ng3 39.Bc4 Rd2 40.Re1 Nd7 (40...Bd5 41.Bc1 Rd4 42.Bb2 (42.Nd5?! Nd5 43.Bd5 Rd5+/–) 42...Rc4 43.Nc4 Bc4 44.Bf6+–) 41.Bc1 Rd6 42.Kf2 Nh5 43.Nf5 (43.Nf5 Rf6 44.g4+–) 1–0. Erlandsson,Harry – Trigance,Eric, corr 3GMM–14, 1996.

5.Nf3 d6 6.c4 Nc6 7.Be2 g6 (7...e4 8.Nd4=) 8.d4+= e4 9.Nfd2 Bg7 10.Nc3 0-0 11.0-0 Nd8 12.Re1 c6 13.Qb3 Nd7 (13...Nf7 14.Red1+=) 14.c5 (14.Red1 Qg5+=) 14...d5= 15.g3 (15.b5 Qe6=) 15...Nf6 16.b5 Be6 17.a4 g5 18.f4 ef3 19.Bf3 Nf7 20.Nd1 (20.Rf1 g4 21.Bg2 Ng5=) 20...Ne4 (20...g4 21.Bg2=) 21.Qc2 (21.Qd3 Rac8=) 21...g4 22.Bg2 h5 23.Nf2 h4 24.Nfe4 fe4 25.Bf1 (25.Rf1 Ng5=+) 25...hg3–/+ 26.hg3 Qc7 (26...Ng5 27.bc6 bc6 28.Ba6–/+) 27.Kg2=+ Ng5 28.Be2 Rf3 29.Nf1 Raf8 30.Bf3 ef3 (30...gf3?! 31.Kh1–/+; 30...Nf3?! 31.Re2=) 31.Kh2 f2 32.Re2 Ne4 33.b6 ab6 34.cb6 Qf7 35.Kg2 Qf3 36.Kh2 Rf6 0–1. Scholz,Guenther – Ziese,Gerhard, BdF, 1986.

5.Nf3 d6 6.Be2 Be6 7.0-0 h6 8.c4 Nbd7 9.Nc3 0-0-0 (9...Nb6 10.d3+=) 10.Qc2 (10.d4 g5+=) 10...c6 (10...g5 11.d4=) 11.b5 c5 12.a4 (12.Nh4 Qe8+=) 12...Nb6 (12...e4!? 13.Nh4 Qf7+=) 13.d3 g5 14.a5 Na8 15.b6 (15.d4 cd4 16.ed4 e4+/–) 15...a6= 16.e4 fe4 (16...Bg7!?=) 17.de4+= Bg7 18.Nd5 Bd5 (18...Qf7!?+=) 19.cd5+/– (19.ed5?! Rde8+=) 19...Nd7 20.Nd2 Ndb6?? (better is 20...h5+/–) 21.ab6+– Nb6 22.Nc4 (better is 22.Qb3 Kc7 23.Bc3 Nd7+–) 22...Nc4 23.Qc4 Qc7 (23...Rdf8 24.Bc3 h5 25.Qb3+–) 24.Bg4 Kb8 25.Bc3 b5 26.Qe2 Qa7 (26...Qb7 27.Ra2 Ka7 28.Ra5+–) 27.Rfb1 (27.Ra5 h5 28.Be6 Kb7+–) 27...Rhf8 28.Rb5! Kc7 (28...ab5 29.Ra5 Double attack (29.Ra7 Pinning; 29.Ra7 Deflection; 29.Ra5 Decoy)) 29.Ba5 1–0. GuestBTYG – GuestFDQD, freechess.org, 2017.

5.d3 Nf6= 6.Nd2 g6 7.g3 Bg7 8.Nh3 (8.Bg2!?=) 8...0-0=+ 9.f4? (better 9.Bg2 fe4 10.de4=+) 9...ef4-+ 10.Nf4 fe4 11.de4 Ne4?? (better 11...g5 12.Bc4 Kh8-+) 12.Bc4= Kh8 13.Bg7 Kg7 14.0-0 Nd2?? (better 14...Ng5 15.Nd5 Rf1 16.Qf1 Qd8=) 15.Qd2+- Nc6 16.Rae1?? (better 16.Nd5 Qe5 17.Rf8 Qa1 18.Rf1 Qd4 19.Qd4 Nd4 20.Nc7+-) 16...Ne5= 17.Bb3 (17.Nd5 Rf1 18.Rf1 A) worse 18...Nc4 19.Qf2 (19.Ne7?? Nd2 20.Rf2 Nc4-+) 19...Qe8 20.Nc7+/-; B) 18...Qd8=+) 17...Bd7 (17...Bf5 18.Nd5 Qd7 19.Qc3=+) 18.Nd5= Qd8 19.Rf8 Qf8 (19...Kf8 20.Qh6 Ke8 21.Qh7+-) 20.Qc3 c6 (20...Qd8 21.Re5 (21.Nc7? Rc8-+) 21...de5 22.Qe5 Kh6 23.Nf6+-) 21.Rf1 (better 21.Re5!? de5 22.Qe5 Kh6 23.Nf6+/-) 21...Qd8 22.Nf6 (22.Ne3!? b5 23.a4=+) 22...Bh3 23.Rf4 Qb6 (better 23...Bf5 24.Ng4 Bg4 25.Rg4 g5-+) 24.Rd4?? (better 24.Kh1 Rf8 25.Ne4-/+) 24...Nf3-+ 25.Kf2 Qd4 (better 25...Nd4 26.g4 Nb5 27.Qe3 Qe3 28.Ke3 Kf6 29.a4 Re8 30.Kd2-+) 26.Qd4 Nd4 27.Ne4 Nb3 28.cb3 Rf8 29.Ke3 Re8 30.Kf4 (30.Kd4 Re5-+) 30...d5 31.Nd6 Re7 32.Nc8 (32.b5-+) 32…Bc8 (32...Bc8 33.Kf3 d4 34.Kf2 d3 35.b5 d2 36.h3 d1Q 37.g4 Re2 38.Kf3 g5 39.bc6 Qd3) 0-1. zembelek (2025) - Pterodactyl (2150), Rated Blitz game, lichess.org, 2015.

5.ef5 Bf5 6.Qf3! Bc8 (6...Bc2?? 7.Qb7 Be4 8.Qe4+–) 7.Bc4 Nf6 8.Nh3 h6 (8...c6 9.0-0=) 9.0-0 Nc6 10.Qe3 Be6 (10...Bf5 11.Bd3 Qd7 12.f4 Bd3 13.Qd3=) 11.Be6+= Qe6 12.f4 0-0-0 (12...Qc4 13.Nc3+=) 13.b5+/– Nb8 14.Qa7 Qc4 15.Qa5 (15.fe5 de5 16.Qa5 Bc5 17.Nf2 Qc2–+) 15...Qc2?? (better is 15...e4+/–) 16.Rc1+– b6 (16...Qc1 17.Bc1 d5 18.Bb2 ef4 19.Nf4 Bc5 20.Kh1+–) 17.Qa7 (17.Rc2?! ba5 18.Bc3 Nbd7 19.Ba5 Nc5+/–) 17...Qb2 (17...Qc1 18.Bc1 d5+–) 18.Rc7 (18.Qc7?!=) 1–0. lucya (2105) – zoko (1700), GameColony.com, 2002.

5.ef5 Nf6+=.

5.c4 fe4= 6.Nc3 d6 7.Ne4 Nd7 8.Nf3 g6 9.d4+= Bg7 10.d5 0-0 11.Be2 Nf6 12.Ng3 Nf5 13.0-0 Ng3 14.hg3 Ng4 15.Qb3 Nh6 16.Rad1 Bg4 17.Qe3 Bd7 18.Bd3 Ng4 19.Qe2 Rae8 20.Nd2 Qg5 21.f3 Qe3–+ 22.Rf2 Qf2 23.Qf2 Nf2 24.Kf2 Bf5 25.Ne4 Rc8 26.Ke2 Rfd8 27.g4 Be4 28.Be4 c5 29.Bd3?? e4!–+ (30.Bg7 ed3 (30...Kg7?! 31.fe4 Rf8 32.g5=+) 31.Kd3 Kg7–+) 0–1. Fischer,A – Ziese,Gerhard, corr SOK–90–68, 1990.

5.Bc4+= d6 6.Nc3 (6.ef5 Qg5=) 6...c6 7.d3 (7.Qh5 g6 8.Qe2 Nd7=) 7...g6 (7...b5 8.Bb3=) 8.Nf3+= Bg7 (8...b5 9.Bb3+=) 9.Qd2 (9.b5 Be6 10.Be6 Qe6 11.bc6 bc6+=) 9...Nf7 (9...b5 10.Bb3+=) 10.0-0 (10.b5 0-0+=) 10...Be6 11.Be6 Qe6 12.ef5 (12.Rae1 0-0=) 12...gf5 13.Rae1 (13.Rfe1 Rg8=) 13...0-0 (13...Rg8 14.Kh1=) 14.Qe2 (14.Re2 b5=) 14...Nd7 (14...Qg6 15.b5=) 15.Nd1 (15.Bc1 e4 16.Bb2 d5=) 15...Rfe8 16.c4 Nf8 (16...a5 17.b5=) 17.Nh4 f4 18.Nc3 Rad8 19.Qh5 Qh6 (19...Nd7 20.Nf3=) 20.Qg4 (20.Qh6 Nh6 21.Nf3 Nf7=) 20...Qg5 (20...Qe6 21.Nf5 Qg6 22.h3=) 21.Qg5 Ng5 22.Nf5 Bf6 (22...Ng6 23.h4 Nf7 24.g3=) 23.Ne4 (23.h4 Nf7+=) 23...Ne4 24.de4 Kf7 25.Rd1 (25.g3 Ng6=) 25...Ke6= 26.g4 Ng6 (26...fg3 27.fg3 d5 28.cd5 cd5 29.ed5 Rd5 30.Rd5 Kd5 31.Rd1 Ke6 32.g4=) 27.Rd2 (27.Rd3 Ne7+=) ½–½. Trokenheim,Marek – Ziese,Gerhard, corr SOK–93–96, 1994.

5.ef5 Nf5 6.Nf3 c6 7.Be2 (7.Be5 d6 8.g4 de5 9.gf5 Bf5=+) 7...d6 8.0-0 g6 9.Nc3 Nd7 10.d3 Bg7 11.Ne1 0-0 12.Ne4 d5 13.Nd2 a5 14.c4 ab4 15.ab4 Ra1 16.Qa1 Qb4 17.Bc3 Qd6 18.cd5 cd5 19.Qb2 Nc5 20.Ndf3 Na4 21.Bb4 (21.Qb4 Nc3 22.Qc3–+) 21...Nb2 22.Bd6 Nd6 23.Nc2 Nb5 24.Rb1 (24.Re1 Be6–+) 24...Nc3 25.Rb2 Ne2 26.Kf1 e4 (27.de4 de4–+) 0–1. Hasler,Ueli – Bendig,Frank (2260), CiF, 2005.

5.ef5 Nf5 6.Nf3 Nc6 =.

5.c4 Nf6 6.e3 g6 7.d4 e4 8.Ng5 Bg7 9.Qc2 h6 10.Nh3 g5 11.Nd2 0-0 (11...f4 12.ef4 Bh3 13.fg5 hg5 14.gh3=) 12.0-0-0 (12.Qb3 a5=) 12...a5 13.b5 c6 14.a4 Nbd7 (14...cb5 15.cb5 Be6 16.Bc3-/+) 15.Ba3 (15.Qb3 cb5 16.c5 Kh7 17.cd6 Qd6 18.Bb5 Qd5=) 15...Re8 (15...cb5 16.cb5 Nb6 17.Nc4 Nc4 18.Bc4 Be6 19.Be6 Qe6 20.Kd2-/+) 16.Kb1 Qe6 17.g3 (17.Rc1 c5=+) 17...d5 18.Be2 (18.Qb3 cb5 19.cd5 Nd5 20.Bb5 Rd8=+) 18...f4-/+ 19.Nf4 (19.Bf1 f3-/+) 19...gf4 20.gf4 Kh8 21.Rhg1 Rg8 (21...Qh3 22.cd5 cd5 23.Nf1-/+) 22.Rg6 (22.cd5 cd5 (worse 22...Qd5 23.Bc4 Qh5 24.Bg8 Kg8 25.Ne4+/-) 23.Rg3 Nf8-/+) 22...Qf7 23.Rdg1 Bf8 (better 23...cb5 24.cb5 Nf8-/+) 24.f5?? (better 24.Rg8 Ng8 25.Bf8 Qf8 26.Qb2=+) 24...Ba3-+ 25.f3 (25.Rh6 Nh7 26.Rg8 Qg8 27.bc6 bc6 28.Rc6 Ndf6-+) 25...ef3 (25...Rg6 26.fg6 Qe7 27.fe4 de4 28.g7 Kg8 29.c5-+) 26.Nf3 (26.Rh6 Nh7 27.Rg8 Qg8 28.Nf3-+) 26...Bf8 (better 26...Rg6 27.fg6 Qe6-+) 27.Ne5 Qe7?? (better 27...Ne5 28.de5 cb5 29.cb5 Rg6 30.fg6 Qg7 31.ef6 Qf6-+) 28.Rg8+- Ng8?? (28...Kh7 29.Rh8! Kh8 30.Ng6 Kh7 31.Ne7 Be7 32.cd5 c5+-) 29.Ng6 Kh7 30.Ne7 Be7 (30...Ne7 31.f6 Kh8 32.fe7 Be7+-) 31.f6 Kh8 32.fe7 (32.Qg6 Ngf6 33.Qg7) 32...Ne7+- 33.cd5 cd5 (33...Nf6 34.d6 Bf5+-) 34.Qc7 Nf6 35.Qe5 (35.Qe7 Bf5 36.Kb2 Ng4 37.Bg4 Bg6 38.Qf6 Kh7 39.Bf5 Rg8 40.Bg6 Rg6 41.Qg6 Kh8 42.Qh6) 35...Bf5 (35...Neg8 36.Bf3 h5 37.Bh5+-) 36.Kb2 Rf8 37.Qe7 Nd7 (37...Ng4 38.Qf8 Kh7 39.Rg4 Bg6 40.Bd3 Bd3 41.Rg7) 38.Qg7 1-0. zembelek (2110) - Pterodactyl (2185), Rated Blitz game, lichess.org, 2013.

5.d4 e4=+ 6.Nfd2 Nf6 (6...e3 7.Nc4 ef2 8.Kf2–/+) 7.e3= g6 (7...a5 8.c4=) 8.Be2 Bg7 9.Nc3 (9.0-0 0-0=) 9...0-0 (9...Be6 10.Nc4=) 10.Bc4 Be6 11.d5 Bf7 12.Qe2 (12.0-0 c6=) 12...Nbd7=+ 13.0-0-0 (13.Bb3!?=+) 13...Nb6–/+ 14.f3 Nfd5 15.Ndb1?? (better is 15.Nd5 Bb2 16.Kb2 Bd5 17.Kb1–/+) 15...Nc4–+ 16.Qc4 (16.fe4 Nde3 17.Rd3 Qe4 18.Re1–+) 16...Nc3 17.Qf1 Na2 18.Kd2 Bb2 19.c3 (19.Qf2 Be5–+) 19...Bb3 20.Re1 (20.Qe2–+) 20...Qe5 21.f4 Qd5 22.Ke2 Bc4 23.Kf2 Bf1 24.Rhf1 Nc3 (25.Nc3 Bc3–+) 0–1. Fiedler,A – Ziese,Gerhard, corr SOK–89–37, 1989.

5.e3 Nf6 6.c4 g6 7.Nc3 c6 8.Be2 Bg7 9.0-0 0-0 10.Qc2 Na6 11.d3 Nc7 12.h3 h6 13.Rab1 g5 (13...a5 14.b5=) 14.Nh2 (14.d4 e4 15.Nd2 Be6+=) 14...Bd7 15.Qd1 a5 (15...b5 16.d4=) 16.f4 (16.ba5!? Ra5 17.Qb3=) 16...ab4 17.ab4 Ne6 (17...ef4 18.ef4 g4 19.hg4 fg4 20.Qd2=+) 18.fg5 hg5 (18...Ng5 19.Nf3 Ne8=) 19.g4 (better 19.Rf5 Qd8 20.b5+/-) 19...f4=+ 20.ef4 (20.e4!?=+) 20...Nf4-/+ (20...ef4?! 21.Nf3=) 21.Rf3 e4 (21...d5!?-/+) 22.de4=+ Ne4 23.Ne4 Qe4 (23...Ne2? 24.Qe2 Ra2 25.Rf8 Qf8 26.Bg7 Re2 27.Bf8 Re4 28.Bd6+-) 24.Bg7?? (24.Bd3 Nd3 25.Qd3 d5 26.Bg7 Rf3 27.Qe4 Rg3 28.Qg2 Rg2 29.Kg2 Kg7=) 24...Kg7?? (better 24...Ne2 25.Kf2 Kg7 26.Qe2 Qe2 (26...Qb1?! 27.Qe7 Kh6 28.Qd6 Qg6 29.Qd7-/+) 27.Ke2 Ra2 28.Kf1 Rh2-+) 25.Bd3 (25.Bf1 Be6=+) 25...Qd4-/+ (worse 25...Nd3 A) 26.Rd3? Ra2 (26...Qc4?! 27.Rd6 Be6 28.Qe1+=) 27.Rg3 Re2-+ (27...Qc4 28.Qd6 Qe2 29.Qd7 Kg8 30.Nf3 Rf3 31.Qd8 Kh7 32.Qd7 Kg6 33.Qd6 Kg7 34.Qg6 Kg6 35.Rf3 Qg2); B) 26.Qd3 d5 27.Rd1 Qd3 28.Rfd3=) 26.Kh1 Ra2 27.Bf5 (27.Qf1 b5!-/+) 27...Rd2 (27...Qc4!? 28.Rc1 (28.Bd7?? Rh2 29.Kg1 Qa2-+) 28...Qe2 29.Qe2 Ne2 30.Rcf1 Bf5 31.gf5-+) 28.Qe1-/+ Re8 29.Qg1 Qg1 30.Rg1 Bf5 31.gf5 Kf6 32.Rfg3 (better 32.Nf1 Rd4 33.Ne3-+) 32...Rg8?? (32...Rh8!? 33.Rf1-+) 33.h4? (better 33.Ng4 Kg7 34.Re1=) 33...g4?? (better 33...Rh8!? 34.Rg4 Rh4 35.Rh4 gh4-+) 34.Rg4?? (better 34.Ng4 Ke7 35.f6 Kd8 36.Ra3+-) 34...Rg4=+ 35.Ng4 Kf5 36.Nh6 Kf6 (36...Ke4 37.Nf7=+) 37.Ng8 (37.Ng4!? Ke6 38.Re1 Re2 39.Re2 Ne2 40.Kh2=) 37...Kf7 38.Nh6 (38.Nh6 Ke6 39.Re1 Kf6 40.Ng4 Kg6 41.Re7=+) 1-0. Knight286 (2110) - Pterodactyl (2220), Rated Blitz game, lichess.org, 2016.

5.e3 Nf6 6.d4 e4 7.Nfd2 g6 8.c4 Bg7 9.Qb3 c6 10.Nc3 Be6 11.Be2 0-0 12.Rc1 Nbd7 13.d5 Bf7 14.0-0 Ne5 15.dc6 bc6 16.Qc2 Rac8 17.Rfd1 d5 (17...Nfg4 18.h3 Nf6 19.Ncb1=) 18.c5 (18.Na4 Rfd8+=) 18...g5 (18...Rb8 19.Nb3+=) 19.Bf1 (19.Nb3 Bh5+=) 19...Bg6 20.Ne2 (20.Ba6 Rcd8=) 20...Nfg4 Black intends f4 (better 20...Nd3!?-/+) 21.h3= Nf2 22.Kf2?? (22.Be5 Nh3 23.gh3 Be5=) 22...f4?? (better 22...Nd3 23.Kg1 Nb2-+ (23...Bb2?! 24.Rb1 Qe5 25.Qb3-+)) 23.Kg1= fe3 24.Nb3 Nf3 25.Kh1 Qc7 (better 25...Bb2 26.Qb2 Qe5 27.Qe5 Ne5+/-) 26.gf3?? (better 26.g3+/-) 26...ef3-+ 27.Ned4 (27.Bg7 Bc2 28.Rc2 fe2 29.Re2-+) 27...Bc2 28.Ne6 (28.Rc2 Qg3 29.Ra1-+) 28...Qg3 29.Bg7 Bd1 (29...Be4 30.Ned4 f2 31.Nf3 Qg1) 30.Rd1 (30.Bb2 f2 31.Bg2 f1Q 32.Bf1 Rf1) 30…e2 (30...e2 31.Nc1 ef1Q 32.Rf1 Qg2) 0-1. diotarolo (2075) - Pterodactyl (2190), Rated Blitz game, lichess.org, 2014.

5.e3 Nf6 6.Be2 g6 7.0-0 Bg7 8.c4 0-0 9.d4 e4 10.Nfd2 Nbd7 11.c5 d5 12.Nc3 c6 13.f3 (13.b5 Bh6+=) 13...ef3 14.Rf3 Ne4 15.Nde4 fe4 16.Rf8 Nf8 17.Qf1 Bh6 18.Qf2 (18.Bc1 Ne6=) 18...Bd7 (18...Qg5 19.Bc1=+) 19.Rf1= Ne6 20.Qg3 Ng7 (better 20...Qg5 21.Qg5 Bg5=) 21.Bg4?? (better 21.Bc1 Be6 22.Kh1=) 21...Bg4-+ 22.Qg4 Be3 23.Kh1 Rf8 24.Rf8 Qf8 25.Nd1 (25.Qe2 Bd4 26.Nd1 Bb2 27.Nb2-+) 25…Qf1 0-1. amnezia (1835) - Pterodactyl (2155), Rated Blitz game, lichess.org, 2014.

5.e3 Nf6 6.Be2 g6 7.0-0 Bg7 8.d4 e4 9.Nfd2 0-0 10.c4 d5 11.Nc3 c6 12.Qb3 Be6 13.b5 Nbd7 14.c5 Rfc8 15.bc6 bc6 16.Qa4 Rab8 17.Rab1 Nf8 18.Na2 Qc7 19.Nb4 Qd7 20.Bc3 h6 21.Ba6 Rc7 22.Nc2 Rb1 (22...Qe8!?+=) 23.Rb1+/– Qe8 24.Rb7 Qf7 25.Rc7 Qc7 26.Ba5 Qb8 27.Nb4 Bd7 28.Nc6 Qe8 29.Bb7 Ne6 30.Qb5 Bf8 (30...f4!? 31.h3 Bf8+/–) 31.Nb3+– f4 32.Qa6 g5 (32...fe3 33.fe3 Ng4 34.Na7 Qb8+–) 33.Ne5 Bb5 34.Qa7 Ba4 35.Qb6 Kg7 36.Bc6 Bc6 37.Qc6 (37.Nc6 Qh5 38.Qb7 Kh8+/–) 37...Qc6 38.Nc6 fe3 39.fe3 Ng4 40.Bd2 Kf7 41.h3 Nf6 42.Ba5 Ke8 43.Bb6 g4 44.a4 gh3 45.gh3 Kd7 46.Na7 Nc7 (46...Ne8+–) 47.c6 Kd8 48.Na5 Nfe8 49.Nb7 Ke7 50.Nb5 Na6 51.Nc5 Nb4 52.c7 Nc7 53.Bc7 Kf7 (53...Ke8 54.Bd6 Bd6 55.Nd6 Kd8 56.Nf7 Kc7 57.Nh6+–) 54.Bd6 Bd6 55.Nd6 Ke7 (55...Kf8 56.Nf5+–) 56.Nf5 Kf6 57.Nh6 Nc6 58.Ng4 1–0. marekt – darius, ChessWorld.net, 2003.

4.c4 d5 5.cd5 Nd5 6.Nc3 Nc3 7.Bc3 Be6 8.Be5 f6 9.Bc3 Nc6 10.d4 Qf7 11.e3 (11.e4 Qg6 12.Qb1 Bd7+/-) 11...Bb3 12.Qc1 0-0-0 13.Nf3 Bc4 14.Bd2 Bf1 15.Kf1 g5 16.b5 Nb8 17.a4 g4 18.Ne1 h5 19.Qc3 h4 20.Rc1 g3?? (better 20...h3 21.Rg1 Bd6 22.gh3 gh3+=) 21.hg3+- Bd6 22.gh4 Rdg8 23.g3 (23.Qa5 Rg4+-) 23...f5? (23...Qd5 24.Rh2 Nd7 25.Qc2+-) 24.Ng2 (24.Qa5 Ba3 25.Rc2 a6+-) 24...Qg7? (24...Nd7 25.Rh3+-) 25.a5 f4 (25...Nd7 26.a6 Qf7+-) 26.Nf4 Bf4 27.ef4 Re8 28.b6 ab6 29.ab6 c6 30.Qf3 Qe7 31.Kg2 Qd6 (31...Qe2 32.Be3 Qf3 33.Kf3+-) 32.Be3 Rhg8 (32...Nd7 33.d5 Re3 34.fe3 Nb6 35.dc6+-) 33.Rc5 (better 33.d5 Qd7+-) 33...Nd7 34.Rg5 Rgf8 (34...Nb6 35.h5+-) 35.h5 (better 35.Rb1!? Qe7+-) 35...Nb6 36.Rg6 Qd7 37.h6 Nd5 38.Rg7 Qf5 39.h7 Ne3 (39...Qd3 40.f5! Ne3 41.fe3 Rf5 42.Qg4+-) 40.fe3 Qc2 41.Kh3 Re6 (41...Kb8+-) 42.Qg4 (better 42.Qh5 Qe4 43.Ra1+-) 42...Rff6 (42...Qe4 43.Ra1 Kb8 44.Qh5+-) 43.Qh4 (43.h8Q Rf8 44.Qf8) 43...Rh6 (43...Qf5 44.Rg4 Rh6 45.h8R Rh8 46.Qh8 Kd7+-) 44.h8Q Rh8 45.Qh8 Re8 46.Qe8 1-0. minnesotawild (2025) - Arsenicum7 (2000), Rated Bullet game, lichess.org, 2015.

4.c4 d6 5.g3 (5.Nc3 Nc6=) 5...Nbd7 6.Bg2 c5 (6...a5 7.Nf3+=) 7.Nc3 g6 (7...Nb6 8.d3=) 8.Nf3 Bg7 9.0-0 0-0 10.e3 (10.d3 a5+=) 10...Nb6 (10...e4 11.Ne1+=) 11.d3 Rb8. Schiffler – Rabel, Aue, 1949.

4.c4 Qd6 5.e3 Ne4 (5...a5 6.b5=) 6.c5 (6.Nf3 Qe7+–) 6...Qf6 (6...Qe6 7.Nf3+=) 7.Nf3 (7.Qf3!? Qf3 8.Nf3+–) 7...d6= 8.Bd3 (better 8.d4 ed4 9.Qd4 Qd4 10.ed4+= (worse 10.Bd4 dc5 11.bc5 Nc5=+)) 8...Nf2?? (better 8...Ng5=) 9.Kf2+– Bg4 10.Qa4 (10.Nc3 dc5 11.Qa4 c6+–) 10...Nc6 (10...c6 11.cd6 Bf3 12.gf3 Qh4 13.Kg2 Qg5 14.Kf1+–) 11.Rf1 (11.Be4 Bd7+–) 11...Bf3 12.gf3 (12.Kg1 Qe6 13.Rf3 Qd7+–) 12...d5 (12...dc5 13.bc5 Bc5 14.Qb5+–) 13.Kg1 Qg5 (13...Qe6 14.Nc3+–) 14.Kh1 d4 (14...a6 15.Bb5! Kd7 16.Bc6 bc6 17.Nc3+–) 15.Bb5 (better 15.Ba6 0-0-0 16.Qc6 ba6 17.Qa6 Kd7 18.Qa4 c6 19.Qa7 Ke8 20.ed4 ed4 21.Qb7+–) 15...a6 (15...Qg6 16.ed4 ed4 17.Re1 Be7 18.Bd4+–) 16.ed4 (16.Bc6 Kd8 17.Bb7 Ra7+–) 16...ed4 (16...0-0-0 17.Bc6 ed4+–) 17.Bc6 bc6 (17...Kd8 18.Bb7 Ra7+–) 18.Qc6 Ke7 19.Re1 Kd8 20.Qe8 (20.Re8) 1–0. MARYMARY – LionxLion, ChessWorld.net, 2016.

4.e3 a6 5.c4 d6 6.Nf3 Bg4 7.Be2 Bf3 8.Bf3 Ra7 9.0-0 Qd7 10.d3 Nc6 11.Bc6 Qc6 12.Nd2 Be7 13.e4 0-0 14.Nf3 Qb6 15.Rc1 a5 16.c5 Qb5 17.cd6 cd6 18.Bc3 ab4 19.Bb4 Ng4 20.h3 Nf6 21.Qe2 d5?? (Better is 21...b6=) 1–0. Klaus Behrmann (2010) – Stiller, ChessWorld.net, 2003.

4.e3 c6 5.Nf3 d5 (better 5...e4!? 6.Nd4 d5=) 6.Ne5+/- Nbd7 7.Nd7 Bd7 8.Be2 g6 (8...Qe6 9.0-0+=) 9.d3 Bg7 10.Nd2 0-0 11.Nf3 Ng4 (11...a5!? 12.ba5 Ra5+=) 12.Bg7 Kg7 13.0-0 Ne5 14.Ne5 Qe5 15.Rc1 (15.d4 Qg5+/-) 15...a5 (15...Qc3 16.Rb1+=) 16.c3 ab4 17.ab4 Ra3 18.Qd2 Rfa8 19.c4 dc4 20.dc4 Be6 21.Qd4 (21.Rfd1!?+/-) 21...Qd4+= 22.ed4 Ra2 23.Bf3 R8a4 (23...Rd2!? 24.b5 Rd4 25.bc6 bc6 26.Bc6 Rc8=) 24.d5+= cd5 (24...Bd7 25.dc6 Bc6 26.Bc6 bc6 27.Rb1+=) 25.cd5+/- Bf5 (25...Bd7 26.Rfd1 Rb4 27.d6+/-) 26.b5 (26.d6 Rb4 27.Rfd1 Ra8+-) 26...Bd3 (26...Be4 27.Rfd1 Bf3 28.gf3+/-) 27.Rfd1+- Bb5 28.d6 Ra8 29.Bb7 Rd8 30.Rc7?? (30.g3+-) 30...Ba6?? (better 30...Rd6! 31.Rcc1 Rd1 32.Rd1 Be2=) 31.Rf7!+- Kf7 32.Bd5 Kf6 33.Ba2 Bb5 34.f3 Ke5? (34...Bd7 35.Bb3 Be6+-) 35.d7 (better 35.Rd5 Kf6 36.Rb5 Rd6 37.Bd5+-) 35...Rd7+/- 36.Rd7 Bd7 37.Kf2 h5 (37...Kd4 38.h4+/-) 38.Ke3 g5 39.g3 h4 40.Bb3 Bf5 41.Ba4 Be6 42.Be8 Bc8 43.Bg6 Be6 44.Bd3 Bc8 45.f4 gf4 46.gf4 Kf6 47.Kf3 Bh3 48.Ke4 Bf5 49.Ke3 Bh3 (49...Bc8 50.Be4 Be6+/-) 50.Be4 Be6 51.Bg2 Bf5 52.Kd4 Be6 53.Ke4 Bf5 54.Kd5 Be6 55.Kd6 Bf5 56.Bf3 (56.Kc5 Bc2 57.Kd4 Kf5+/-) 56...Be6 (56...Bd3 57.Kd5 Kf5 58.Kd4 Kf4 59.Bc6=) 57.Bg2 Kf5?? (better 57...Bf5=) 58.Bh3+- Kf4 59.Be6 (better 59.Ke6 Kg5 60.Kf7+-) 59...Kg5= 60.Ke5 Kh6 61.Kf4 Kh7 62.Kg4 Kh8 63.Kh4 Kh7 64.Kh5 Kh8 65.Kh6 ½-½. reza3136 (2175) - panaga (2195), Rated Blitz game, lichess.org, 2016.

4.e3 Nc6 5.c4 e4 6.d4 d6 7.Be2 d5 8.Nc3 dc4 9.Bc4 Bg4 10.Nge2 0-0-0 11.Qa4 a6 (11...Nd7 12.Nd5 Qg5 13.h4+-) 12.b5 (better 12.Ba6 ba6 13.Qc6+-) 12...Nb4?? (better 12...ab5 13.Bb5 Nb8+/-) 13.ab4+- Qb4 14.ba6 Qb2 (14...Qa4 15.Ra4 ba6+-) 15.a7 c6 (15...Qa1 16.Qa1 Kd7+-) 16.Qc6!! bc6 (16...bc6 17.a8Q Mate attack) 17.a8Q Kd7 (17...Kc7 18.Ra7 Kd6 19.Ne4 Ne4 20.Qd8 Bd7 21.Qd7) 18.Ra7 Kd6 19.Qd8 Nd7 (19...Bd7 20.Rd7! Nd7 21.Ne4) 20.Ne4 1-0. PEREIRA – Zeitnot, internet, 2021.

4.Nf3 Nc6 5.b5 d6?? 6.bc6+- bc6 7.e3 Be6 (7...Rb8 8.Qc1+-) 8.Be2 g6 9.0-0 Bg7 10.c4 0-0 11.d4 (11.Nc3 e4 12.Nd4 Bd7+-) 11...ed4 12.Nd4 c5 (12...Bd7 13.Nc3+-) 13.Ne6 Qe6 14.Bf3 (14.Nc3 Rab8 15.Rb1 c6+-) 14...Rad8 (14...Rab8 15.Qc2+-) 15.Nd2 Rfe8 16.Qb3 (16.Rb1 Rb8+-) 16...Qd7 (16...Rb8 17.Qc2+-) 17.Rfd1 (17.Bf6!? Bf6 18.Rab1 a5+-) 17...Rb8 18.Qc2 Rb7 (18...Rb2 19.Qb2 Ne4+-) 19.Bb7 Ra8 (19...Rb8 20.Bf3 Qc8+-) 20.Ba8 1-0. GM_HUSARZ (1915) – bbrahim, Rated Bullet tournament qM7z3uZs, lichess.org, 2015.

5.d3 g6 6.g3 Bg7 7.Bg2 Be6 8.Nf3 Nbd7 9.0-0 0-0 10.Re1 c5 11.bc5 Qc5 12.d4 ed4 13.Qd4 Qc6 14.Qa4 Ne4 15.Nd4 Nc3 16.Qc6 (16.Nc6? Na4 17.Ne7 Kh8 18.Bg7 Kg7 19.Nd5 Rac8–+) 16...bc6 17.Bc3 Rfc8 18.Rab1 (18.Ne6? Bc3 (18...fe6?! 19.Bg7 Kg7 20.e4=) 19.Nf4 Rab8–+) 18...c5 19.Nb5 Ne5 20.e3 a6 21.Nd6 Rc6 22.Be5 Be5 23.Nc4 Bc3 24.Red1 Rd8 25.Rd3 Bf6 26.Rbd1 Bf5 27.e4 (< 27.Bd5 Bd3 28.Rd3 Rc7=+; 27.Rd5?! Rcc8 28.Nd6 Bc2+/–) 27...Bg4 (27...de4 28.Rd8) 28.R1d2 Re8 29.Rd5 Be6 30.Rd6 (better is 30.e5+–) 30...Rd6+= 31.Nd6 Rd8 32.f4 Bd4 33.Rd4 cd4 34.e5 Rb8 35.Kf2 (35.Bb7=+) 35...Bf5?? (better is 35...Rb2 36.Be4 Ra2–/+) 36.c4?? (better is 36.Nf5 gf5 37.Bh3=) 36...dc3–+ 37.Ke2 (37.Nf5 c2 38.Ne3–+) 37...Bc2 (better is 37...Rb2 38.Ke3 c2–+) 38.Ke3 Bb1 (38...Rb2 39.Bf3 Bb3–+) 39.g4? (39.Bd5 Rf8–/+) 39...Rd8 (39...Rb3 40.Bf1 c2 41.Kd2 Rc3–+) 40.Bd5 Rd7 41.f5? (41.Ke2!?–/+) 41...Rc7 42.Bc4? (better is 42.Bf7 Kf8 43.Bc4–+) 42...c2 43.Kd2 c1Q! 44.Kc1 Ba2 45.Kb2 Bc4 (45...Rc4?! 46.Nc4 Bc4 47.Kc3–+) 46.Ne8 Rb7 (better is 46...Re7!? 47.Nf6 Kg7 48.Kc3 Re5 49.Nd7–+) 47.Kc3 Be2 48.h3 Re7 49.Nf6 Kg7 50.Kd4 Bf3 51.h4 Rb7 52.Ne8 Kf8 53.fg6 hg6 (53...Ke8?? 54.gh7 Rd7 55.Ke3+–) 54.Nd6 Rb3 55.g5 Ra3 56.Nc4 Ra4 57.Kc5 Be2 58.Nb6 Rh4 59.Nd7 Ke7 60.Nf6 a5 61.Nd5 Kf8 (better is 61...Ke6!? 62.Nf6 a4 63.Nh7 Rh7 64.Kb4 Rh4 65.Ka3 Ke5 66.Kb2–+) 62.Kd6 a4 63.e6 fe6 64.Ke6 Bc4 65.Ke5 Bd5 66.Kd5 a3 67.Kc5 a2 0–1. Berrio,Ana – Rada,Daniel Eloy, Navidad op Barranquilla, 1999.

5.d4 e4 6.e3 c6 7.b5 Qd8 8.bc6 bc6 9.Nge2 Bg4 10.Qb1 Bd6 11.h3 Bh5 12.g4 Bg6 13.Rg1 0-0 14.h4 h5 15.g5 (15.gh5 Bh5 16.Bh3 Nbd7=+) 15...Ng4-/+ 16.Bh3 Nh2 17.Rg2? (better 17.Bg2!?-/+) 17...Nf3-+ 18.Kd1 Na6 19.Qc1 Rb8 20.Ra2 Nc7 21.Nb1 Nb5 (better 21...Ne6!? 22.c4-+) 22.Nd2 Nh4 23.Rg1 Qa5 24.a4 Bb4 25.c3 Bd6 26.Nb3 (26.c4!? Nc7 27.c5-/+) 26...Qa6-+ 27.Qa1 (27.Qc2 Nf3 28.Rg2 Rb7-+) 27...Nc7 (better 27...Nc3 28.Bc3 Rb3-+) 28.Nc5?? (better 28.Nd2-+) 28...Bc5 29.dc5 (29.Nf4 Nf3 30.Rh1 Bd6-+) 29...Qd3 30.Ke1 Nf3 31.Kf1 Nd2 (better 31...Ng1 32.Kg1 Qe2-+) 32.Ke1 Nf3 33.Kf1 Ng1 34.Kg1 Qe2 35.Ba3 (35.c4-+) 35...Qf3 36.Bg2 Qg4 37.Qf1 h4 38.Kh2 Qg5 39.a5 (39.c4 Qe5 40.Kg1 dc4-+) 39...Nb5 (39...Qe5 40.Kh1 Qc3 41.Qd1-+) 40.Bb4 (40.Bb2 Qe5 41.Kh1 Nc3-+) 40...f5 (better 40...Qe5!? 41.Kh1 Nc3 42.Bc3 Qc3 43.Qd1-+) 41.c4 Nc7 42.Bd2 Bh5 43.f4 (43.cd5 Nd5 44.Rc2 Rb5-+) 43...Qf6 (better 43...ef3 44.Be1 Rb1 45.Bf3 Bf3 46.Qf3 Re1 47.Qf2 Qe3 48.Qe3 Re3 49.cd5 Nd5 50.a6-+) 44.Rc2 Rb2 (better 44...d4 45.ed4 Qd4 46.Qe1-+) 45.Bc3 Qg6 (45...Rc2!? 46.Bf6 Bf3 47.Be5-+) 46.Rb2 (46.Bb2 Qg3 47.Kh1 dc4 48.Bd4-+) 46...Qg3 47.Kh1 Bf3 (better 47...h3 48.Be5 hg2 49.Rg2-+) 48.Be1? (better 48.Bf3 Qf3 49.Qf3 ef3 50.Be5-/+) 48...Qh3 (48...Bg2 49.Rg2 Qe3 50.cd5 Nd5 51.Bd2 Qc5 52.Rh2-+) 49.Kg1 Qg4 (better 49...Bg2 50.Qg2 Qe3 51.Qf2 Qf2 52.Bf2 dc4 53.Bh4 c3-+) 50.Kh2 Rf6 (50...dc4 51.Qc4 Nd5 52.Bh3-+) 51.Rb8 Kh7 52.Rb7 Ne6 53.Bf3 (better 53.Bh3!? Qh5 54.cd5 Nc5 55.Ra7 cd5 56.Bc3-+) 53...ef3-+ (53...Qf3 54.Qf3 ef3 55.cd5 Nc5 56.Bh4-+) 54.Qh3 (54.Qh3 f2 55.Bf2-+). beatmeeasy (1950) - JohnnyRa (1920), lichess.org, 2021.

5.Nf3 d4 6.Nb1 b5 7.e3 Nc6 8.Bb5 Bb7 9.ed4 ed4 10.Be2 Rd8 11.0-0 Qd7 12.Bb5 Be7 13.Nd4 0-0 14.d3 Qd5 15.Bc6 Bc6 16.Nf3 g5 17.Nc3 Qd7 18.Ng5 Kh8 19.Ne2 Rg8 20.Nf7 Kg7 21.Nd8 Bd8 22.Ng3 Kh8 23.Qe2 Qd5 24.f3 h6 25.Rae1 Kh7 26.Ne4 Ne4 27.de4 Qg5 28.Bd4 Qf4 29.Qd2 Time forfeit 1-0. cowbook - Ferroceno (1635), Rated Blitz game, lichess.org, 2016.

5.e3 Nc6 6.b5 Na5 7.Nf3 (better 7.Qa4 b6 8.Nf3=) 7...d5 (better 7...Nc4!? 8.Bc4 Qc4 9.Be5 Nd5=+) 8.Ne5 Nc4 9.Nc4 dc4 10.Bf6 (better 10.Qc2!?+–) 10...Qf6= (worse 10...gf6 11.Qa4+–) 11.Nc3 Bc5 (11...Be6 12.Qc2 Qg6 13.Qa4=) 12.Qe2?? (12.Bc4 Be6 13.Be6 Qe6+–) 12...b6?? (better 12...Be6=+) 13.Qc4+– 0-0 14.Bd3 (14.d4 Be6 15.Ne4 Qd8+–) 14...Re8 (14...Be6 15.Qe4 Qh6 16.Be2+–) 15.Qd5 (15.Be4 Be6 16.Qa4 Rad8+–) 15...Be6 16.Qe4 Bf5?? (better 16...Qh6+–) 17.Qf5+– Qf5 18.Bf5 g6 (18...a6 19.Bd7 Red8 20.Bc6+–) 19.Bd7 Red8 20.Bc6 Rac8 21.Nd5 Re8 (21...Bf8+–) 22.Be8 Re8 23.Nc7 (better 23.Nf6!? Kf8 24.Ne8 Ke8+–) 23...Re4 24.f4 (24.0-0 Ra4+–) 24...Bd4 25.0-0 (better 25.Rb1 Bc5+–) 25...Ba1 26.Ra1 Rc4 27.Nd5 f5 (27...Rc2 28.Rd1+–) 28.d3 (28.Nc3 Rc7+–) 28...Rc5 29.Ne7 (29.e4 fe4 30.de4 Rb5 31.Nf6 Kg7+–) 29...Kg7 (29...Kf8 30.Nc6 Rb5 31.Ne5+–) 30.h4 (30.a4!? Rc3+–) 30...Rb5 31.Rc1 (31.Nc6 Rc5 32.Ne5 b5+–) 31...Kf6 (31...Rb3 32.Rc7 Ra3 33.Nf5 Kf8 34.Nd4+–) 32.Nc8 Rb3 33.Rc6 Kg7 (33...Kf7 34.Rc7 Ke8 35.Rh7 Ra3 36.e4 Rd3 37.ef5 gf5 38.Ra7 Rd1 39.Kh2+–) 34.Rc7 Kh6 35.Ra7 Rd3 36.Re7 (36.Nb6 Re3 37.Nd7 Kg7+–) 36...Rd1 (36...b5 37.Na7 Rb3 38.Kf2 Rb2 39.Kf3+–) 37.Kf2 Rd2 38.Kf3 Ra2 (38...b5 39.Nb6 Rd8 40.Rb7+–) 39.Ra7 g5 (39...Rd2+–) 40.hg5 Kh5 41.Nb6 (41.Rg7 h6 42.Ne7 Ra1 43.Rh7 Rf1 44.Kg3 Rf4 45.ef4 b5 46.Rh6) 41...Ra1 (41...h6 42.Nd7 Ra1 43.gh6+–) 42.Rh7 Kg6 43.Rh6 (43.Re7 Rf1 44.Kg3 Re1 45.Nc4 Ra1 46.Ne5 Kh5 47.Rh7) 43...Kg7 44.Rf6 (44.Nc4 Kg8+–) 44...Ra3 45.Rf5 Kg6 46.Nc4 Ra1 47.Nd6 Rf1 (47...Rd1 48.Rf6 Kh7 49.g6 Kg7 50.Ne8 Kh6 51.g7 Kh7 52.Rf8 Rf1 53.Kg4 Rf4 54.ef4 Kg6 55.g8Q Kh6 56.Qg7) 48.Kg4 Rg1 49.Rf6 Kg7 50.g3 (50.Nf5 Kh8 51.Kh5 Rh1 52.Kg6 Rh6 53.gh6 Kg8 54.h7 Kh8 55.Rf8) 50...Kh7 51.g6 (51.Nf5 Rc1 52.g6 Kg8 53.Ne7 Kh8 54.Rf8 Kg7 55.Rf7 Kh6 56.Rh7) 51...Kg7 (51...Kg8 52.Nf5 Rc1 53.Ne7 Kh8 54.Rf8 Kg7 55.Rf7 Kh6 56.Rh7) 52.Ne8 Kh8 (52...Kg8 53.Rf7 Ra1 54.Nf6 Kh8 55.g7) 53.g7 (53.Rf8) 53...Kh7 54.Nd6 (54.Rf8 Rg3 55.Kg3 Kg6 56.g8Q Kh6 57.Qg5 Kh7 58.Nf6) 54...Kg7+– 55.Re6 Rh1 56.f5 Kh7 57.f6 Kh6 58.f7 Kg7 (58...Kh7 59.f8R Rf1 60.Rf1 Kg8 61.Rf7 Kh8 62.Re8) 59.Re7 (59.Rg6 Kf8 60.Rg8 Ke7 61.f8Q Ke6 62.Rg6 Kd5 63.Qf5 Kc6 64.Qb5 Kc7 65.Qb7 Kd8 66.Rg8) 59...Kf6 60.Rd7 (60.f8Q Kg6 61.Qg7) 60...Ke6 61.Rd8 (61.f8Q Kd7 62.Qe8 Kd6 63.Qb8 Ke6 64.Qb6 Kd7 65.Qb7 Kd6 66.Qh1+–) 61...Re1 (61...Rf1+–) 62.f8Q Re3 (62...Rf1 63.Nf7! Rf4 64.ef4 Kf6 65.Rd6) 63.Qh6 (63.Qf5 Ke7 64.Rd7) 63...Ke7 (63...Kd5 64.Ne4! Kc4 65.Qe6 Kb5 66.Rb8 Ka5 67.Qd5 Ka4 68.Qa8) 64.Qe3 (64.Qg5 Ke6 65.Qf5 Ke7 66.Rd7) 64...Kd8 65.Kf4 (65.Qb6 Kd7 66.Kf5 Ke7 67.Qc7 Kf8 68.Qf7) 65...Kc7 66.Qe5 (66.Qc5 Kd8 67.Ke5 Kd7 68.Qc8 Ke7 69.Qe8) 66...Kd7 67.g4 Kd8 (67...Kc6 68.g5 Kd7 69.g6 Kc6 70.g7 Kd7 71.g8Q Kc6 72.Qc4 Kd7 73.Qc8) 68.g5 (68.Nf5 Kd7 69.Qd6 Kc8 70.Qe7 Kb8 71.Nd6 Ka8 72.Qb7) 68...Kd7 69.g6 Kc6 70.g7 Kd7 (70...Kc7 71.g8Q Kb6 72.Qd8 Kc6 73.Qb5) 71.g8Q Kc6 72.Qc4 Kd7 73.Qe8 (73.Qc8) 73...Kd6 74.Qd4 (74.Qee6) 74...Kc7 75.Qe7 (75.Qe7 Kc6 76.Qdc5) 1–0. MARYMARY – LionxLion, ChessWorld.net, 2015.

5.e3 Be7 6.Bd3 (6.Nf3 d6=) 6...0-0 7.Bc1 (7.Nf3!? e4 8.Nd4=) 7...d5 8.Bc2 (8.Qc2!?–/+) 8...dc4–+ 9.Nf3 Rd8 10.0-0 (10.Bb2 Nbd7–+) 10...c5 11.d4? (11.bc5 Bc5 12.Bb2 Nc6–+) 11...cd4 (11...cd3 12.Bb3 c4 13.Ba2–+) 12.Ng5? (better 12.ed4 ed4 13.Re1–/+) 12...Qd6 (better 12...Qa6 13.f4 de3–+) 13.f4 (13.ed4 ed4 14.Ne4 Qd7–+) 13...ef4 (13...d3!? 14.Ba4 ef4 15.Ra2–+) 14.Nd2 (14.ed4 Nc6 15.Nf3–+) 14...fe3 15.Nde4 (15.Nc4 Qd5 16.Ne3 de3 17.Be3–+) 15...Qe6 (better 15...Qd5 16.Nf6 Bf6 17.Nh7 Bh4–+) 16.Ne6+– Be6 17.Nf6 Bf6 18.Rf6! gf6 19.Be3! b6?? (19...de3 A pinning theme 20.Qd8) 20.Bd4 Black creates threats along the open d–file (better 20.Qf3 Nd7 21.Bd4+–) 20...Nc6 21.Bd3?? (better 21.Bh7 Kh7 22.Qh5 Kg7 23.Qg5 Kf8 24.Bf6+–) 21...Rd4–/+ (21...cd3 22.Bf6 Rd5 23.Qd2+–) 22.Bh7? (22.Qa4 cd3 23.Qc6–+) 22...Kh7–+ 23.Qh5 Kg7 24.Qf3 Bg4 (better 24...Rc8–+) 25.Qc6–/+ Rd1?? (better 25...Rc8 26.Qa4 c3=+) 26.Rd1+– Bd1 27.Qa8 (27.Qa8 c3 28.Qa7+–) 1–0. MARYMARY – BOLTSFAN, ChessWorld.net, 2017.

5.Nc3 c6 6.Nf3 Bg7 7.e3 0-0 8.Be2 d5 9.d4 e4 10.Nd2 h5 11.h3 Nbd7 12.g4 h4 13.Qb3 Nb6 14.c5 Nbd7 15.0-0-0 a5 16.b5 a4 17.Na4 cb5 18.Bb5 Nb8 19.Nb6 Ra5 20.a4 Nc6 21.Nd5 Nd5 22.Qd5 Nb4 23.Qb3 Rb5 24.ab5 Nd3 25.Kc2 Be6 26.Qc3 Nc5 27.Ba3 b6 28.Ne4 Bb3 29.Qb3 Qe4 30.Kd2 Nb3 31.Ke2 Nd4 32.Kd2 Qc2 Normal 0-1. Benachamohcine1 (1920) - Masoretes (1890), Rated Blitz game, lichess.org, 2015.

5.e3 Bg7 6.Qb3 0-0 7.Nf3 d6 8.a4 (8.d4 e4 9.Nfd2 Nc6=) 8...a6 9.d3 Nc6 10.Nbd2 Re8 11.b5 ab5 (11...Nd8 12.Be2=) 12.cb5 (12.ab5 Ra1 13.Ba1 Nb8=) 12...Na5 (12...Be6 13.Qd1 Nb4 14.Be2=+) 13.Qc2 c5 14.Bc3 (14.bc6 Nc6 15.Nc4 Be6=+) 14...Qc7 (14...Nd5 15.e4 Nc3 16.Qc3–/+) 15.Be2 b6 16.0-0-0? (16.0-0!?=+) 16...Be6 (16...Nd5 17.Ba5 Ra5 18.Nc4–+) 17.Ng5–/+ h6 (17...Bd7 18.Nge4–/+) 18.Ne6=+ Re6 19.Qa2 (19.Rde1 Qa7=+) 19...Rae8 (19...d5 20.Rde1–/+) 20.h4 h5 21.Rdg1 Nh7?? (better 21...Ra8=+) 22.g4+– f6?? (better 22...hg4 23.Bg4 f5+–) 23.gh5+– g5 (23...c4 24.dc4 (24.hg6?! cd3 25.gh7 Kh8 26.Bd3 Qc3 27.Bc2 f5+–) 24...gh5 25.Bh5+–) 24.Bg4 Kf8 (24...Qf7 25.Be6 Re6 26.Ba5 ba5+–) 25.Be6 Rd8 26.Ne4 Ke7 (26...d5 27.Bd5 g4 28.Ba5 ba5 29.Be6+–) 27.Bg8 Rf8 (27...d5 28.Bd5 c4 29.Ba5 Rd5 30.Qc4+–) 28.Bh7 (better 28.Ba5 Qc8 29.Bh7 ba5 30.hg5 f5+–) 28...Rh8 29.Bg6 (29.hg5 c4 30.h6 Bh6 31.Rh6 Kd8+–) 29...Kf8 30.Nd6! (30.Nd6 c4 31.Ba5 ba5 32.Qc4 Qc4 33.dc4 gh4 34.Nf5 Bh6 35.Rd1 Kg8 36.Rd8 Bf8 37.Rf8 Kf8 38.Rd1 Rh5 39.Rd8) 1–0. Delboy Smith (1625) – ureds (1655), ChessWorld.net, 2018.

5.Nd2 Qe6 6.Ngf3 Nc6 (6...Bd6 7.c4 c6 8.c5=) 7.g3 (7.b5!? Nd4 8.Nd4 ed4 9.Bd4+=) 7...Bd6=+ 8.Ng5 Qe7 9.Ngf3 b6 (9...d4 10.b5 Nd8 11.c3 dc3 12.Bc3=) 10.Bg2 0-0 11.0-0 Be6 (11...a5 12.b5 Na7 13.c4=) 12.Ng5 (12.b5 Nd8 13.Ne5 a6+–) 12...h6 (12...a5 13.Ne6 Qe6 14.b5+=) 13.Ne6 fe6 14.c4 Rab8 15.Qc2 (15.b5 Na5+=) 15...Nd4= 16.Bd4 ed4 17.Rae1 (17.b5 a6 18.Nf3 Bc5=) 17...c5 18.b5 Ng4 (better 18...dc4!? 19.Qc4 Rbe8+=) 19.cd5+– ed5 20.Bd5 Kh8 21.Ne4 (21.Nc4 Qg5 22.Bf3 Rbd8+–) 21...Qc7 (21...Qe5 22.Bc6+–) 22.Nd6 (22.e3!?+–) 22...Qd6+– 23.Bf3 Nf6 24.a4 (24.e4 de3 25.fe3 Rbd8+–) 24...Rbd8+= 25.Qd2 Nd5 26.Bg2 Rd7 27.Qa2 Nc3 28.Qb3 Re7 29.Qc2 Qe6 30.e4 (30.e3 Qf7+–) 30...Qa2 (30...a6!?=) 31.Qa2+– Na2 32.Ra1 Nc3 33.Rfe1 (33.f4 g5 34.f5 Kg7+–) 33...Rfe8 (33...g5 34.f3+=) 34.Kf1 Ra8 (34...g5 35.f4+–) 35.f4 White intends e5 35...Rd8 36.e5 (36.Kf2 Rf8+–) 36...Kg8 (36...Rf8 37.Kg1+–) 37.Bc6 Re6 (37...Rf8!? 38.Kg2 g5 39.fg5 hg5+–) 38.Kg2 a6 (better 38...Rf8+–) 39.f5 Re7 (39...Rc6 40.bc6 Rc8 41.e6+–) 40.ba6 Ra7 (40...Kf8 41.e6+–) 41.Bb7 (41.e6 Kf8 42.e7 Re7 43.Re7 Ke7+–) 41...Kf7 42.e6 (42.Ra3 Nd5 43.Kf3 Ne3+–) 42...Kf6 43.g4 Nd5 44.Kf3 (44.Rab1 Nb4 45.Kg3 Re8+–) 44...Nb4 45.e7 (45.a5!? b5 46.Rad1 g6 47.fg6 Na6 48.Ba6 Ra6+–) 45...Re8 46.Re6 Kg5?? (better 46...Kf7 47.a5 b5+–) 47.h4! Kh4 (47...Kh4 48.Rh1 Mate attack) 48.Rh1 Kg5 49.Rh5 1–0. mic – pyrthian, net–chess.com, 2018.

5.Nf3 d4 6.e3 a6 7.Be2 Nc6 8.0-0 Bg4 9.ed4 Bf3 10.Bf3 ed4 11.Re1 0-0-0 12.Re7 Be7 13.Bc6 bc6 14.c3 dc3 15.Bc3 Nd5 16.Qg4 Kb8 17.Bd4 f6 18.Bc5 Bc5 19.bc5 g5 20.Nd2 Rhe8 21.g3 Nc3 22.Qb4 Nb5 23.a4 Rd3 24.Nb3 f5 25.ab5 cb5 26.Ra6 Rd1 27.Kg2 c6 28.Rc6 Ree1 29.Qb5 Ka7 30.Ra6 Normal 1-0. Melchiades - val1313, Rated Blitz game, lichess.org, 2015.

5.b5 d5=.

5.c4 ab4 6.ab4 Ra1 7.Ba1 Nc6 (7...d5 8.c5=+) 8.b5= Nd8 9.Nf3 Qb4? (better 9...e4 10.Nd4 d5=) 10.Be5+- Be7 11.Be2 (11.Bc7 d5+-) 11...d6 12.Bc3 Qc5 13.0-0 Qh5 14.d4 Qg6 15.Re1 (15.Bd3 Qh5+-) 15...Ne4 16.Bd3 (16.Nfd2 Nf6+/-) 16...Bg4 17.Nbd2 Nd2?? (better 17...Nf2 18.Bg6 Nd1 19.Bf7 Nf7 20.Rd1 Ng5+/-) 18.Bg6+- (18.Qd2?! f5 19.Kh1 Bf3 20.gf3 0-0+-) 18...Bf3 (18...Nc4 19.Bd3 Nb6 20.Ba5+-) 19.gf3 (19.gf3 Nc4 20.Bd3+-) 1-0. BeepBeepImAJeep (2610) - debaisieux (2105), lichess.org, 2016.

5.c4 c5 6.Qf3 cb4?? (better is 6...e4 7.Bf6 gf6=) 7.Qa8+– Ne4 (7...Qd6 8.ab4 a6+–) 8.Qb8 Qf6 (8...Qd8 9.Qe5 Qe7 10.Qb8+–) 9.Qc8 Ke7 10.f3 (10.Nf3 Qc6 11.Qb8 f6 12.ab4 Nd6 13.Ra7 Qc8 14.Qb6 Nc4 15.Bc4 Qc4+–) 10...Nd6 (10...Qh4 11.g3 Ng3 12.hg3 Qh1 13.Ne2+–) 11.Qa8 (11.Qc7 a5+–) 11...g6 12.Qd5 Bg7 13.f4 ef4 14.Bf6 Bf6 15.e4 (15.d4 Nf5 16.Qe4 Kf8 17.Qf4 Bh4 18.g3 Be7+–) 15...Ne4 16.Qe4 Kd8 17.Qd3 (better is 17.Qa8 Ke7 18.Qa7 Ba1 19.ab4 Bb2+–) 17...Ba1 18.Qd5 Bf6 19.Qa8 Ke7 20.Qe4 Kf8 21.Kd1 Kg7 22.c5 Rd8 23.h4 d6 24.h5 dc5 25.Bd3 gh5 26.Qh7 Kf8 27.Rh5 Ke7 28.Qe4 Kf8 29.Bb5 Kg7 30.Qf4 Rd4 31.Rh7! Kh7 32.Qf6 Kg8 33.Nf3 1–0. slavisa10 – AbrahamLinbloom, Live Game Caissa's Web, 2004.

5.Qf3 d5 6.Qg3 d4 7.Nf3=.

5.Qf3 e4 6.Bf6 gf6 7.Qg3 (7.Qf4 d5=) 7...d6 (7...c6 8.d4=) 8.d3 f5 9.de4 (9.Ne2 c6=) 9...fe4 10.Bc4 (10.Nc3 c6=) 10...f5 (10...c6 11.Nd2+=) 11.Ne2= Be6 (11...c6 12.Nd4=) 12.Nd2 (better is 12.Be6!? Qe6 13.Nd4=) 12...d5 (12...Rg8! 13.Qh3 d5+=) 13.Bb3. wlittle (2270) – jwong (2005), net–chess.com, 2003.

5.Bb5 Bd7 6.Be2 Qe6 7.d3 Bd6 8.Nd2 0-0 9.Ndf3 e4 10.Nd4 Qe8 11.h3 c5 12.bc5 Bc5 13.Bc3 Bd4 14.Bd4 Qe7 15.Bg4 Nc6 16.Bf6 gf6 17.Bd7 Qd7 18.d4 Qf5 19.Ne2 Qg5 20.Ng3 Ne7 21.h4 Qg6 22.h5 Qg5 23.Rh3 Nf5 24.Nf5 Qf5 25.Qe2 Kh8 26.g4 Qg5 27.Kd2 Rac8 28.f4 ef3 29.Qf3 Rfe8 30.Qf5 Qf5 31.gf5 Rg8 32.Rh2 Rg3 33.Rf1 Re8 34.Re2 Rg5 35.Rh2 h6 36.c3 Reg8 37.Rff2 Rg1 38.Kc2 Ra1 39.Kb2 Rgg1 40.Kb3 Rgb1 41.Rb2 Re1 42.Rbe2 Rab1 43.Ka4 b5 44.Ka5 Rf1 45.Rhf2 Rh1 46.Rb2 Rb2 47.Rb2 Rh5 48.Rb5 Rf5 49.Rb8 Kh7 50.Rb7 h5 51.Rf7 Kg6 52.Ra7 h4 53.Ra8 Rh5 54.Rg8 Kf5 55.Kb5 h3 56.a4 h2 57.a5 h1Q 58.Ka6 Qf1 59.Kb6 Qb1 60.Kc5 Ke4 61.a6 Qb3 62.a7 Qc4 63.Kd6 Qa6 64.Ke7 Rh7 65.Kf8 Qa7 66.Rg4 Kd3 67.Kg8 1-0. Alco1 – basico, Rated Blitz game, lichess.org, 2014.

5.c4 dc4 6.Bc4 Be6 7.Qc2 Bc4 8.Qc4 Nc6 (8...a5!?=) 9.b5+= Na5 10.Qa4 b6 11.Nf3 0-0-0 (11...Nd7 12.d4+=) 12.Be5+– Ne4?? (better 12...Qe6+–) 13.Qe4+– f6 14.Qf5 Kb8 (14...Qd7 15.Qd7 Rd7 16.Bg3+–) 15.Bg3 Nb3 16.Ra2 g6 (16...Qc5 17.Qc5 bc5 18.Rc2+–) 17.Qc2 Nc5 (17...Qf7 18.0-0 Bd6 19.Bd6 Rd6 20.Nc3+–) 18.d4 Ne4 19.0-0 h5 (19...Re8 20.Nc3 Ng3 21.hg3+–) 20.Bc7! Qc7 21.Qe4 Bd6 (21...g5 22.Rc2 Qh7 23.Nfd2+–) 22.Qg6 Rhg8 (22...Qc4 23.Rc2 Qb5 24.Nc3+–) 23.Qf6 Rdf8 (23...Rgf8 24.Qe6+–) 24.Qe6 Rf3 (24...Re8 25.Qb3+–) 25.Qg8 Rf8 26.Qg6 Bh2 27.Kh1 Bd6 28.Rc2 Qe7 (28...Qd8 29.Rfc1 Qh4 30.Kg1 Bh2 31.Kf1+–) 29.Kg1 h4 (29...Bc7 30.Qh5 Qd8 31.f4+–) 30.Rc6 Rf6 (30...Rd8 31.Nc3 h3 32.Rc1+–) 31.Qg4 Rf8 32.Rfc1 h3 33.Rc8 Kb7 34.Nd2 hg2 35.Qg2 Qe4 (35...Rf3 36.Qf3 Qe4 37.Qe4) 36.Qe4 1–0. Dalia – Magadan, internet, 2019.

5.d3 Nc6 6.Be2 g6 7.Nf3 e4 8.Nd4 Bd7 9.Nc3 a6 10.Nc6 Bc6 11.0-0 Bg7 12.de4 de4 13.Qe1 0-0 14.b5 ab5 15.Nb5 Rad8 16.c4 Rd7 17.Bc3 Rfd8 18.a4 Qe6 19.Rc1 Ng4 20.Bg7 Kg7 21.Qc3 Kg8 22.h3 Ne5 23.Nd4 Qf6 24.Nc6 bc6 25.a5 Qg5 26.a6 Nf3 27.Bf3 ef3 28.g3 Qf5 29.Kh2 Rd3 30.Qb4 Rd2 31.a7 Ra2 32.Qb7 h5 33.Ra1 Rdd2 34.a8Q Kh7 35.Ra2 1-0. Peltu_Yono (1820) - warzoid (1810), Rated Classical game, lichess.org.

5.d4 e4 6.Ne2 a5 7.c4 (7.b5!?=) 7...ab4-/+ 8.ab4 Ra1 9.Ba1 Qb4 (9...dc4 10.b5 Qb4 11.Nd2 Qb5-/+) 10.Bc3? (better 10.Nd2!?-/+) 10...Qc4-+ 11.Nf4 Qc6 12.Be2 Bd6 13.0-0 Bf4 14.ef4 0-0 15.f3 (15.Bb4 Re8-+) 15...ef3 16.Bf3 Bf5 17.Qb3 Re8 18.Na3 Ne4 19.Bb4?! (19.Re1 Na6-+) 19...Na6 (better 19...Qb6!? 20.Be4 Qd4 21.Rf2 de4 22.Bc3-+) 20.Be1 h6 21.h3 b6 22.Nc2 Nf6 23.Ne3 Be4 24.Be4 Re4 25.Nf5? (25.Bh4 Qe6 26.Nc2 Re2 27.Bf6 Qf6-+ (worse 27...gf6 28.Rf3-/+)) 25...Nb8 (25...Qe6 26.Ng7 Kg7 27.f5-+) 26.Qd3?? (better 26.Bh4 Kh7 27.Bf6 Qf6 28.Qd5-+) 26...Nbd7 (better 26...Qe6 27.Nh6 gh6-+) 27.Qe4!!+- Ne4 (27...de4 28.Ne7 Double attack; 27...Ne4 28.Ne7 Double attack) 28.Ne7 Kf8 29.Nc6 Ng3 (29...Ke8+-) 30.Bg3 Nf6 31.Ne5 (better 31.f5 Ne4 32.Bc7 b5+-) 31...Ne4 32.Nd7 (better 32.Bh2 f5 33.Rc1+-) 32...Ke7 33.Ne5 (better 33.Nb6!? cb6 34.Bh2 Nc3+-) 33...Ng3?? (33...Kf8 34.Bh2 f5+-) 34.Nc6 Kd6 35.Ne5 f5?? (better 35...Ke7=) 36.Nf7 (36.Nf7 Ke6 37.Rf3 Ne2 38.Kf2 Nd4 39.Rd3+/-) 1-0. muhammadaudii (1920) - TheSwager (1955), Rated Bullet game, lichess.org, 2020.

5.Be2 c6 6.Nf3 Be6 7.d3 Nbd7 8.Ne5 Ne5 9.Be5 Bg4 10.Bb2 Be2 11.Qe2 Qe6 12.Nd2 Bd6 13.0-0 Be5 14.Be5 Qe5 15.d4 Qg5 16.h3 0-0 17.Nf3 Rfe8 18.Qd2 Qh5 19.Ng5 Qg5 20.Qd3 Ne4 21.c4 Re6 22.cd5 cd5 23.Kh2 Rg6 24.g3 Ng3 25.Rg1 Nf1 26.Kh1 Qg1 0-1. slippo25 (1730) - segevsg (1705), Rated Bullet game, lichess.org, 2014.

5.Be2 g6 6.d4 e4 7.c4 c6 8.cd5 cd5 9.Qc1 Nc6 10.b5 Na5 11.Qc3 Bg7 1–0. Bonetti,Shane – reptile, ICC, 2002.

5.Nf3 Bg4 6.Be2 Nc6 7.b5 Bf3 8.Bf3 Na5 9.0-0 0-0-0 (9...Nc4!? 10.Bc3 0-0-0=) 10.d3+= e4 11.Be2 Qd6 (11...b6 12.Nd2+=) 12.Nd2 Be7 13.Nb3 Nb3 14.cb3 ed3 15.Qd3 Ne4 (15...Kb8 16.Rac1+=) 16.Rfd1 (better is 16.Qd4!? Kb8 17.Qg7+/–) 16...Bh4= 17.g3 Bf6 18.Bf6 gf6 (18...Qf6!? 19.Rf1 h5=) 19.Bf3 f5 20.Be4 (20.Qc2!?+=) 20...fe4= 21.Qd4 f5?? (better is 21...Kb8=) 22.Qa7+– h5 23.b4 (23.Rac1 c6+–) 23...Kd7 24.Qb7 h4?? (24...Ke6 25.Rac1 Rb8+–) 25.Qc6! Kc8?? (25...Qc6 26.bc6 Combination) 26.Qd6 (better is 26.Qa8!? Kd7 27.Qd5 Ke7 28.Qd6 Rd6 29.Rd6 Kd6 30.gh4 Rh4+–) 26...Rd6 (26...cd6?? 27.Rd5 Rh5 28.a4+–) 27.Rac1 h3 28.Rc6 Kd7 29.Rdc1 1–0. Fournier,Frederic (2100) – Sanedrac (1900), Echecs21 (1/5), 2003.

5.g3 Ne4 6.Bg2 Nf6 7.Ne2 Bg4 8.0-0 Be2 (8...a5 9.b5=) 9.Qe2+= d4?? (9...c6 10.c4+=) 10.Qb5 (better 10.Bb7 c6 11.Ba8+-) 10...Nbd7? (better 10...c6 11.Qa5 de3 12.fe3 Ng4+/-) 11.ed4 ed4 (11...Rb8 12.de5 Ng4 13.Re1+-) 12.Bd4 b6 (12...Rb8 13.Bb7 a5+-) 13.Nc3 a6 14.Qc6 Rc8 15.Rfe1 Qe1 (15...Kd8 16.Re7 Nb8 17.Rf7 Nc6 18.Bc6 Rb8+-) 16.Re1 Be7 17.Bf6 gf6 18.Bh3 (18.Nd5 0-0 19.Ne7 Kg7 20.Nc8 Rc8 21.Qd7 Rf8 22.Qg4 Kh6 23.h4 Rh8 24.Re5 fe5 25.Qg5) 18...Kf8 19.Bd7 Rd8 20.Qc7 (20.Re7 Ke7 21.Nd5 Kf8 22.Qf6 Rg8 23.Qd8 Kg7 24.Qf6 Kf8 25.Be6 Rg3 26.fg3 Kg8 27.Qf7 Kh8 28.Qf6) 20...Kg7 21.Nd5 (better 21.Re7 b5 22.Nd5 Rd7 23.Qd7 Ra8 24.Rf7 Kg6 25.Rf6 Kg5 26.Qf5) 21...f5 22.Ne7 (22.Qe5 Bf6 23.Qf6 Kg8 24.Ne7 Kf8 25.Qh8) 22...Rhg8 (22...h6 23.Nf5 Kg6 24.Qd6 Kg5 25.f4 Kg4 26.Nh6 Kh5 27.Bg4) 23.Ng8 (23.Ng8 Rg8 24.Qe5 f6 25.Qe7 Kh6 26.Qf6 Rg6 27.Qh4 Kg7 28.Re7 Kf8 29.Qh7 Rg3 30.fg3 f4 31.Qg7; 23.Nf5 Kg6 24.Qf4 Rd7 25.Re5 f6 26.Qg4 Kf7 27.Nh6 Kf8 28.Qg8) 1-0. SAIRAM – adoplius, Rated Classical game, lichess.org. (=1.e3 A00: Irregular Openings 1...e5 2.a3 d5 3.b4 Qe7 4.Bb2 Nf6)

6.b5 h6 7.Be2 Qe6 8.0-0 Bd6 9.d4 e4 10.Nfd2 h5 11.c4 c6 12.Nc3 Qf5 13.bc6 bc6 14.cd5 cd5 15.Nb5 Bb8 16.Rc1 Nf8 (16...Ba6!?+=) 17.Rc7!+/– Ng6?? (17...Bc7 18.Nc7 Double attack) 18.Nd6+– (18.Nd6 Kd8 19.Rc8 Qc8 20.Nc8 Kc8 21.Ba6 Kd7 22.Bb7+–) 1–0. Klaus Behrmann (2080) – nbh999 (1930), ChessWorld.net, 2003.

6.Nc3 c6=.

6.c4 a5 7.cd5 Nd5 8.Qb3 c6 9.Nc3 (9.b5 e4 10.bc6 bc6=) 9...Nc3 (9...ab4 10.Nd5 cd5 11.Bb5=+) 10.Bc3 (10.dc3 Nf6=) 10...a4 (better 10...e4!? 11.Nd4 ab4 12.Bb4 c5=) 11.Qb2 g6? (better 11...f6=) 12.Ne5+- Bg7?? (better 12...Rg8+-) 13.Nd7 Bc3 (13...Bd7 14.Bg7 Rg8 15.Bf6+-) 14.Qc3 (14.Qc3 Kd7 15.Qh8+-; 14.dc3?! Bd7 15.Be2 Rd8+/-) 1-0. zembelek (2050) - marin12 (1905), Rated Blitz game, lichess.org, 2014.

6.c4 d4 7.c5 (7.ed4 e4 8.Ne5 Ne5 9.de5 Ng4+=) 7...de3 (7...d3!?=+) 8.de3+= e4 9.Nd4 Ne5 10.Qc2 c6 (10...a5 11.Nc3+=) 11.Nc3 a5 (11...Ng6!?+–) 12.Ne4+– Ne4 13.Qe4 f5? (better 13...ab4 14.ab4 Ra1 15.Ba1 Ng4+–) 14.Nf5 Bf5 15.Qf5 Ng6 (15...Nd7 16.Rd1 ab4 17.ab4+–) 16.Bc4 ab4 (16...Nh4 17.Qh5 Ng6 18.0-0+–) 17.ab4 Ra1 18.Ba1 Nh4 (18...Qd7 19.Be6 Qc7+–) 19.Qc8 Qd8 20.Bf7! Ke7 (20...Kf7 21.Qb7 Double attack (21.Qd8 Deflection)) 21.Qe6 1–0. guestuefq – guestzjub, internet, 2018.

6.Be2 h6 (6...g6 7.Nc3=) 7.0-0+= Qd6 (7...Qe6 8.c4+=) 8.c4 e4 (8...dc4 9.Nc3 Qe6 10.Qc2+=) 9.c5+/– Qe7 10.Nd4 Ne5 (10...c6 11.Nc3+/–) 11.Nb5 a6 (11...Nc6 12.Qa4+/–) 12.Qa4 Bd7?? (better is 12...Nc6+/–) 13.Nc7+– Kd8 14.Qa5 Nc6 (14...Rb8 15.Ne6 Ke8 16.Be5 Qe6 17.Bb8+–) 15.Qb6 (15.Qb6 Kc8 16.Na8+–) 1–0. Janek – Gusten, internet, 2017.

5.c4 Qd8 6.Nf3 Be7 7.Be2 0-0 8.d3 Bg4 9.Nbd2 Nbd7 10.h3 Bf3 (10...Be6 11.0-0=) 11.Bf3+= c6 12.0-0 d5 13.cd5 cd5 14.Qb3 Nb6 (14...a5!? 15.Bd5 Qb6+/–) 15.Be5+– a5 16.b5 (16.ba5 Ra5 17.Rfc1 Bd6+–) 16...a4 17.Qb2 Rc8 18.Rac1 Rc1 (18...Qd7 19.Bd4 Qd6 20.Rc3+/–) 19.Rc1 Qd7 (better is 19...Nbd7 20.Bc7 Qa8+–) 20.Rc7 Qe6 21.Bd4 Rb8? (21...Nbd7+–) 22.Bb6 Bd6 (22...Ba3 23.Qa3 Qb6 24.Qe7+–) 23.Rc1 Be5 (23...Ba3 24.Qa3 Qb6 25.Qa4+–) 24.Bd4 Bd6 (24...Nd7 25.Be5 Ne5 26.Qd4+–) 25.Bf6 Qf6 (25...gf6 26.Qd4 Qe5 27.Qg4 Kf8 28.Rc8 Rc8 29.Qc8 Kg7 30.d4+–) 26.Qf6 gf6 27.Bd5 Ba3 28.Ra1 Bb4 29.Ne4 (better is 29.Nc4!? a3 30.Na3 Ra8+–) 29...a3 30.Nf6 Kh8 31.e4 Bc3 32.Ra3 (better is 32.Nd7 Ba1 33.Nb8 Bd4+–) 32...Bf6 33.Bf7 Rf8 34.Bd5 Bd4 35.Ra2 (worse is 35.Bb7 Rf2 36.Ra4 Be3+–) 35...b6 36.Kf1 h5 37.f3 Rc8 38.Bc4 Rc7 39.Ra8 Kh7 0–1. GuestGBHM – boobalan, freechess.org, 2017.

5.c4 g6 6.Nf3 Bg7 7.d4 0-0 8.Nfd2 (8.de5 de5 9.Be5 Rd8=) 8...Nbd7 (better 8...ed4 9.Bd4 Nc6=+) 9.Nc3?? (9.Be2 a5=) 9...b6?? (9...ed4 10.Nb5 de3 11.fe3 Qe3 12.Qe2-+) 10.Qc2?? (10.Qf3 Ba6 11.d5 e4+=) 10...Bb7?? (10...ed4 11.Nd1 de3 12.fe3-+) 11.Bd3?? (better 11.d5=) 11...ed4-+ (11...Bg2?! 12.Rg1 ed4 13.Rg2 dc3 14.Bc3-/+) 12.Ne2 (12.Nce4 de3 13.fe3 Rae8 14.Nf6 Bf6-+) 12...de3 13.0-0-0 (13.fe3 Qe3 14.Nf1-+) 13...ed2 14.Rd2 Bg2 15.Rg1 Bb7 16.Nf4 (16.f4 Rfe8-+) 16...Rfe8 (better 16...Bh6 17.Nh3 Bd2 18.Qd2-+) 17.Bg6 (17.Re2 Ne5 18.Kb1 Qd7-+) 17...hg6 (17...fg6 18.Nd3-+) 18.Ng6 (18.Re2 Qf8 19.Kb1 Be4-+) 18...fg6 19.Qg6 Nf8 (19...Qf7 20.Qd3-+) 20.Qg3 (20.Qf6 Qf6 21.Bf6-+) 20...Qf7 21.h4 (21.Kd1 Re4 22.f3 Rc4-+) 21...Qc4 (21...Re4 22.c5-+) 22.Kb1 (22.Rc2 Qf7 23.Qg7 Qg7 24.Rg7 Kg7 25.Rc7 Kg6 26.Rb7 Re2-+) 22...Be4 23.Ka1 Bd5 (better 23...Bg6 24.Qc3 Qc3 25.Bc3 Re4-+) 24.Qg7 1-0. danishguy (2160) - JF30 (2170), Rated Bullet game, lichess.org, 2020.

5.Nf3 Bg4 6.Be2 Nc6 7.0-0 (7.b5 Na5+=) 7...0-0-0 (7...a6 8.h3 Bd7 9.d3+=) 8.h3 (8.b5 Na5+–) 8...Bh5 (8...Bf3 9.Bf3 d5 10.d4+=) 9.b5+– Na5 10.d3 e4 (10...Qd7 11.a4+–) 11.Nfd2 (11.Nd4 Be2 12.Qe2 c5 13.bc6 Nc6 14.Nc6 bc6+–) 11...Bg6 (11...Be2 12.Qe2 ed3 13.cd3+–) 12.d4 (better 12.Bc3 b6 13.Ba5 ba5 14.Nc4+–) 12...Kb8? (12...c5 13.bc6 Nc6 14.c4+–) 13.c4 (better 13.Bc3 b6 14.Ba5 ba5 15.Nb3+–) 13...b6+– 14.Nb3 Nb3 15.Qb3 d5 16.cd5 (16.Nc3 Qd6+–) 16...Nd5 (16...Rd5 17.a4+–) 17.a4 Qe6 (17...Qb4!? 18.Qc2 Qd6+–) 18.Bc4+– c5?? (better 18...Qf5+–) 19.Nc3 Bf5 20.Bd5 (20.Bd5 Qg6 21.a5 Rd5 22.Qd5 Bh3 23.Qd8 Bc8 24.Ne4 ba5 25.dc5 Qe4 26.b6+–) 1–0. retiponziani (1920) – Dreadvader9 (1860), ChessWorld.net, 2015.

5.d3 Nf2? 6.Kf2+– Qh4 (7.g3 Qf6 8.Qf3 Be7+–; 6...d5 7.Nc3 c6 8.Qf3+–) +–. serbiansaint – Subtlety, Caissa's Web, 2004.

5.d3 Nf6+=.

5.Nf3 d6 6.Bc4 Bg4 (better 6...Nf6!?=) 7.Bd5+– Bf3? (better 7...c6 8.Be4 d5 9.Bd5 cd5+–) 8.Qf3+– Nf2 9.0-0 e4 (9...c6 10.Bb3 d5 11.Qf2 f6+–) 10.Qf2 c6 11.Bf7 Kd7 (11...Kd8 12.Qf5 a5 13.Rf4+–) 12.Qf5 Kc7 (12...Kd8 13.Rf4 d5 14.c4+–) 13.Nc3 Nd7 14.Ne4 g6 (14...h6 15.c4+–) 15.Qf4 (15.Bh8 gf5 16.Nd6 Kd6 17.Rf5 Qe4–+) 15...Ne5 (15...Bh6 16.Qh6 Qe4 17.Bh8 Rh8 18.c4+–) 16.Nd6! Kd6 (16...Kd6 17.Be5 Double attack (17.Qd4 Deflection); 16...Qd6 17.Be5 Double attack (17.Be5 Decoy; 17.Be5 Remove defender)) 17.d4 Qf7 (17...Kc7 18.de5 Bh6 19.Qh6 Rhd8+–) 18.Qe5 (18.Qe5 Kd7 19.Rf7 Kd8 20.Qc7 Ke8 21.Qd7) 1–0. DEFFM – GuestFFYV, freechess.org, 2018.

5.Nf3 Qf6? 6.Be5+/– Qf5 (better is 6...Qd8!?+/–) 7.Bc7+– d5 8.d3 Bd7? (8...Ng5+–) 9.de4 de4 10.Nd4 Qe5 (10...Qg6+–) 11.Be5 1–0. GuestKVNF – GuestFSWT, freechess.org, 2016.

5.c4 Bg7 6.Nc3 d6 7.h3 (7.h4 Bg4 8.Be2 Be2 9.Qe2 Nbd7=) 7...b6 (7...0-0 8.g4+=) 8.Qf3 e4 (8...c6 9.g4+=) 9.Qd1?? (better is 9.Ne4 Qe4 10.Qe4 Ne4 11.Bg7+/–) 9...Bb7 10.Nge2 Nbd7 11.Nd5 Bd5 (11...Qd8!?+=) 12.cd5= 0-0 13.Nc3 Ne5 14.Qc2 (14.Be2 Qd7+=) 14...c6 (14...a5 15.Bb5+=) 15.dc6+= Nc6 16.Ba6 d5 17.Qa4 (17.0-0 Rad8+=) 17...Ne5= 18.0-0 Rfd8 19.Ne2 (19.Qc2 Nh5=) 19...Nh5 (19...Ne8 20.Ra2=) 20.Be5 (20.Qb3 Nc4 21.Bg7 Ng7= (21...Nd2? 22.Qc3 Nf1 23.Bd4+–)) 20...Be5= (worse is 20...Qe5 21.Rad1+=) 21.Rac1 g5 Black plans d4 (21...d4!?=) 22.f4 (22.Qd1 Nf6 23.d4 Bd6+/–) 22...gf4 23.ef4 Bg7 (23...Bh8 24.g4 Ng7 25.Nd4+/–) 24.Kh2 (better is 24.g4!? Nf6 25.Nd4+/–) 24...d4 25.Qc6 (25.Qb5 Nf6 26.Ng3 e3+=) 25...d3 (25...e3 26.de3 Qe3 27.Rf3+/–) 26.Nc3+= Bc3 27.Rc3 Rab8 (27...Kh8 28.Qh6 Nf6 29.Qh4+=) 28.Qh6 (28.Qb5 Nf6 29.Qg5 Kf8+/–) 28...Qh4 (28...Ng7 29.f5 Ne8 30.Kg1+=) 29.Qg5 Qg5 30.fg5 1–0. Feofanov,Alexander – Bereziy,Petr, 2008.

5.c4 Bg7 6.Nf3 0-0 7.Ne5 d6 8.Nf3 Re8 (8...Be6 9.Be2+/-) 9.Be2 Nc6 (9...a5 10.b5+/-) 10.0-0 Bg4 11.d3 Bf3 (11...a5!? 12.b5 Nd8+/-) 12.Bf3+- (12.gf3?! Nh5 13.Bg7 Ng7+/-) 12...Ne5 (12...h6 13.Nc3+-) 13.Be2 (13.Bb7 Rab8 14.Ba6 Qe6+-) 13...h5 (13...d5 14.cd5 Nd5 15.d4+/-) 14.Nd2 h4 15.Nf3 h3 16.g3 Neg4 17.Nd4 Ne3? (better 17...Ne5!?+/-) 18.fe3+- Qe3 (18...Nd5 19.Rf2 Ne3 20.Qd2+-) 19.Rf2 Ng4 20.Bg4 Bd4 21.Bd4 Qd4 22.Qf1?? (22.Bh3 Re3+-) 22...Re3?? (better 22...Qg4 23.Rf4 Qe6=) 23.Bh3+- Rae8 (23...Rd3 24.Kh1 f5 25.Rf4+-) 24.Kh1 (24.Rd1 f5+-) 24...d5? (24...Qc3 25.Rc1 Qa3 26.Rf7 Qc1 27.Qc1 Kf7 28.Qf1 Kg7 29.Qa1 Kh6+-) 25.Bg2 (25.Rf7 dc4 26.dc4 Qa1 27.Qa1 Kf7 28.Qf1 Kg7+-) 25...dc4 26.dc4 (worse 26.Rf7 Qa1 27.Qa1 Re1 28.Rf1 Ra1 29.Bd5 Kg7 30.Ra1 cd3+-) 26...Qg7 (26...c6+-) 27.Rf7! Qf7 28.Bd5 (worse 28.Bb7 Qf1 29.Rf1 Ra3 30.Bd5 Kg7=+) 28...Qd5?? (better 28...R8e6+/-) 29.cd5+- c6 (29...R3e7 30.Qb5 b6 31.Rc1+-) 30.dc6 (30.d6 Kg7 31.Qf2 R3e4+-) 30...bc6 31.Qc4 R8e6 32.Rf1 Kg7 (32...R3e4 33.Qa6 Re7 34.Qc8 Kh7 35.Rf8+-) 33.Qd4 Kh6 (33...Kg8+-) 34.Qh4 (34.Qh4 Kg7 35.Qf4+-; 34.Qh8 Kg5 35.Qh4) 1-0. ClayPigeons (2080) - EudesLeTeuton (2080), Rated Bullet game, lichess.org, 2019.

5.d4 d6 6.de5 de5 7.Nf3 Nfd7 8.Nbd2 Bg7 9.Nc4 0-0 10.h4 a6 11.Be2 1-0. theNewGuy98 (1655) - lapuissance203, Rated Classical game, lichess.org.

5.Nf3 d6 6.d4 Nbd7 7.de5 de5 8.Nc3 c6 9.e4 Bg7 10.Bd3 0-0 11.0-0 Re8 12.Nd2 Nh5 13.Ne2 Nf8 14.c4 Rd8 15.Nb3 Be6 16.Qc2 White intends c5 16...Rd6 17.Rad1 Rad8 18.Bc1 b6 (18...Qh4 19.Be3 a6 20.Bb6+/–) 19.Be3 White prepares c5 19...R6d7 20.c5 Bb3 21.Qb3 b5 22.Bb1 Ne6 23.Rd7 Qd7 24.a4 (24.Bc2 Qc7+=) 24...a6 (24...Nhf4 25.Bf4 ba4 26.Qa4 ef4 27.Ba2=) 25.f3 (25.Bc2!?+=) 25...Nhf4= 26.Nc3 Nd4 27.Qa2 (27.Qa3 Bh6 28.Kh1 Qe6=) 27...Qe7 28.g3 Nfe6 29.Kg2 (29.Qa3!?=) 29...a5+= 30.Nd5 (30.Qa3!? ab4 31.Qb4–/+) 30...Qb7 (30...cd5 31.ed5 Nf8 32.ab5 ab4 33.Qc4–/+) 31.ab5–/+ Qb5 32.f4 (32.Qa5 Qa5 33.ba5 cd5–/+) 32...ab4 (32...cd5 33.ed5 ef4 34.gf4–+) 33.f5 (33.Ne7!? Kh8 34.fe5–+) 33...cd5 34.fe6 fe6 35.Bd4 ed4 36.Qa7 (36.ed5 ed5 (36...Qc5?! 37.de6 Qc6 38.Kg1–/+) 37.Qa7 Rf8–+) 36...Rf8 37.Rf8 Bf8 38.ed5 (38.Qb6 Qe2 39.Kg1 Qe3 40.Kg2 de4 41.Qe6 Kg7 42.Be4–+) 38...Qe2 (38...Bc5?! 39.Bd3 Qd3 40.Qc5 Qe4 41.Kg1 Qd5 42.Qb4–+) 39.Kg1 Qe1 40.Kg2 ed5 (40...Qb1 41.d6 Qe4 42.Kh3 Qf5 43.Kg2 Qd5 44.Kf2–+) 41.Qd7 Qe2 42.Kg1 Qf3 (42...Qd1 43.Kg2 Qb1 44.Qd5 Kg7 45.Qd4 Kf7 46.Qc4 Ke7 47.c6 Qb2 48.Kh3–+) 43.c6 d3 44.Qe6 Kg7 45.Qd7 (45.Qe5 Kf7 46.Qf4 Qf4 47.gf4–+) 45...Kh8 46.Qe8 b3 (better is 46...d2 47.Bc2 d1Q 48.Bd1 Qd1 49.Kg2 Kg7–+) 47.Bd3 Kg7 48.Qd7 Kf6 49.Qd8 Ke5 50.Qe8 Kd6 51.Qd7 Ke5 52.Qe8 Kd6 ½–½. Schmitt,Bernhard – Strittmatter,Norbert (2120), Verbandsliga Sued Baden, 2004.

5.Nf3!? e4 6.Nd4=.

5.g3 Bg7+= 6.Bg2 c6 7.Nf3 d6 8.0-0 e4 9.Nd4 Nfd7? (9...h5 10.f3=) 10.f3 (better is 10.Nc6 Nc6 11.Bg7+–) 10...ef3+= 11.Bf3 0-0 12.Nc3 Ne5 13.Ne4?? (better is 13.Be2=) 13...Nf3 14.Qf3 c5 15.Nf5? (better is 15.bc5 dc5 16.Bc3 cd4 17.Bb4–/+) 15...Bf5–+ (15...gf5?! 16.Bg7 Kg7 17.Nc3–+) 16.Bg7 Kg7 (16...Be4?! 17.Bf8 Kf8 18.Qd1–/+; 16...Qe4?! 17.Qe4 Be4 18.Bf8 Kf8 19.d3–/+) 17.Nc3 Nc6 18.Rae1 (18.bc5 dc5 19.Nd5 Qd6–+) 18...cb4 19.e4 Be6 (better is 19...Bh3!? 20.Nd5 Qe5 21.Rf2–+) 20.Nd5 Bd5 21.ed5 Ne5 22.Qb3 Qc7 23.ab4 Nc4 (23...Qb6!? 24.Kh1–+) 24.Qc3 Kg8 25.d3 (25.Rf2 Rac8–+) 25...Qb6 26.Kg2 (26.d4 Qb5–+) 26...Ne3 27.Re3 Qe3 28.Rf3 Qe5 (better is 28...Qg5 29.Qd4–+) 29.Qc7 (29.Qe5 de5 30.c4–+) 29...Rac8 30.Qb7 Rc2 31.Kh3 (31.Rf2 Rf2 32.Kf2 Qb2 33.Kf1 Qh2 34.Qd7–+) 31...Qh5 0–1. willi_weizenkeim – mase, playchess.de, 2003.

5.Qe2 d6?? (better 5...d5 6.d3 Nd6 7.Be5 Nc6=+) 6.Qe4+– Nc6 (6...Nd7 7.Qf3+–) 7.Nc3 Be6 8.Nge2 0-0-0 (8...f5 9.Qd3+–) 9.g3 (better 9.b5!? Na5 10.Nd5 Qe8+–) 9...f5 10.Qf3 e4 (10...d5 11.d4+–) 11.Qg2 (11.Qe3 Kb8+–) 11...d5 12.b5 (12.Nb5 Kb8+–) 12...Na5 (12...Ne5 13.Nd4+–) 13.Nd4+– Nc4 14.Ne6 Qe6 15.Bc4 dc4 16.0-0 (better 16.g4!? g6 17.0-0-0+–) 16...Rd2+= 17.Rfe1 (17.Rac1!?+=) 17...Rc2= 18.Ne4? (18.Rab1 Bc5 19.Re2 Re2 20.Ne2 Qd7=) 18...fe4 (better 18...Rb2 19.Ng5 Qd7–+) 19.Re4 Qe4?? (better 19...Qd7 20.Bd4 Rd2 21.Ba7 Rd1 22.Re1 Re1 23.Re1 Ba3= (worse 23...Qb5 24.Qh3 Kd8 25.Qh4 Kd7 26.Qg4 Kd8 27.Rd1 Bd6 28.Be3+–)) 20.Qe4+– Rb2 (20...Rd2 21.Qc4 Kb8+–) 21.Re1 (21.Qe8) 21...Ba3+– 22.Qe6 Kb8 (22...Kd8 23.Rd1 Bd6 24.Rd6 cd6 25.Qd6 Kc8 26.Qc5 Kb8 27.Qe5 Ka8 28.Qb2 Rc8+–) 23.Qe8!! Re8 24.Re8 The nicest combinations are those leading to mate 1–0. MARYMARY – torridon1, ChessWorld.net, 2018.

5.Nf3 d6 6.c4 (6.Bc4 Ng5=+) 6...h6 (6...Nf6 7.Be2–/+) 7.Qa4 (7.Be2 Nc6=+) 7...Bd7–/+ 8.b5 (8.Qc2 Ng5 9.Ng5 Qg5–/+) 8...b6 (better 8...Nc5 9.Qd1 Bg4–+) 9.c5? (better 9.Be2–/+) 9...Nc5–+ 10.Qc2?! (10.Qd1–+) 10...e4 11.Nd4 f6 (11...Nd3!? 12.Ke2–+) 12.Bc4 (better 12.Be2–+) 12...g5?? (better 12...Nd3 13.Kf1 Nb2–+) 13.0-0 Bg7 (13...a6 14.Nc3 Bg7 15.Rae1+=) 14.Re1 (14.Bd5 Bb5 15.Nb5 c6 16.Be4 f5+–) 14...f5? (better 14...c6 15.Nc3 f5 16.bc6 Nc6= (worse 16...Bd4 17.Ne4 fe4 18.Bd4+–; 16...Bc6 17.Nf5 Qc7 18.Ne4 Bb2 19.Qb2 Ne4 20.Qh8 Kd7 21.Qg8+–)) 15.Qd1?? (15.Bd5 Nd3 16.Qd3 ed3 17.Re7 Ke7 18.Ba8+=) 15...Bd4 (better 15...a6!? 16.a4 Be5–+) 16.Bd4=+ Rf8 17.Nc3 (17.d3 Be6 18.Be6 Qe6 19.de4 fe4 20.Bc5 bc5 21.Nc3=) 17...c6 (better 17...Be6!? 18.d3 Bc4 19.dc4 Qf7 20.Bc5 bc5–/+ (20...dc5?? 21.Ne4 fe4 22.Re4 Qe7 23.Qd5 Qe4 24.Qe4 Kd8 25.Qa8+–)) 18.Qh5 Kd8 19.Nd5?? (19.Qh6 Be6 20.Ne4 fe4 21.Be6+–) 19...cd5–+ 20.Bd5 Be8 (better 20...Ne6 21.Be3 Bc6 22.bc6 Nc7–/+) 21.Qh6+= Nb7?? (better 21...Nd3 22.Re3 Bb5 23.Ba8 Bc6 24.Bc6 Nc6=) 22.Bb7+– Qb7 23.Qf8 Qd5 (23...Qd7+–) 24.Bf6 Kd7 25.Qe7 Kc8 26.Rac1 (26.Rac1 Bc6 27.Qd8 Kb7 28.Rc6 Qc6 29.bc6 Nc6 30.Qd7 Ka6 31.Qc6 d5 32.Rb1 e3 33.Rb4 ef2 34.Kf2 Re8 35.Ra4; 26.Qe8 Kb7 27.Qe7 Nd7 28.Qd7 Kb8 29.Rac1 Qc5 30.Rc5 bc5 31.Be7 e3 32.Bd6) 1–0. MARYMARY – Ashbridge, ChessWorld.net, 2013.

5.c4 Bg4 6.Nc3 Bf3 (6...Nbd7 7.e4=) 7.gf3 c6 8.d4 e4 (better is 8...Nbd7=) 9.fe4 Ne4 10.Bg2 f5 11.Ne4 fe4 12.Qc2 e3 13.Rf1 Nd7 14.d5 cd5 15.Bd4 ef2 16.Rf2 dc4 17.Bb7 Rb8 18.Qc4 Rb7? (18...Ne5 19.Bc6 Nc6 20.Qc6 Qd7 21.Qe4 Qe7+–) 19.Qc8 Qd8 20.Qb7 Be7 (20...Qg5 21.Qa7 Be7 22.Qa8 Bd8 23.Qe4 Qe7 24.Qe7 Ke7+–) 21.Rc1 Bh4 (21...Nc5 22.bc5 Qd7 23.c6 Qb7 24.cb7+–) 22.Rc8 Bf2 23.Bf2 Ke7 (23...Rf8 24.Bh4 Rf6 25.Qe4 Ne5 26.Rd8 Kd8 27.Qh7 Ke8 28.Bf6 gf6 29.Qa7 f5+–) 24.Bh4 (24.Bh4 Ke6 25.Bd8+–) 1–0. orane – lennox, internet live, 2003.

5.d4 e4 6.Nfd2 d5 7.e3 Bf5 8.c4 c6 9.c5 Qe6 10.a4 Be7 11.a5 a6 12.Be2 0-0 13.h4 h6 14.h5 Nbd7 15.Rh4 Nh7 16.g4 Bh4 17.gf5 Qf5 18.Bg4 Qf2 0-1. GrubyRycho - tax2478 (1840), Rated Classical tournament, lichess.org, 2014.

5.d4 e4 6.Ng1 d5 (6...e3 7.fe3 Bf5 8.c4-/+) 7.e3=+ g6 (7...Bg4 8.Qd2=+) 8.c4= c6 9.cd5 cd5 10.Nc3 Bg7 11.Bb5 (11.Nge2 0-0=) 11...Bd7 12.Bd7 Nbd7 13.Qb3 Qe6 14.Nge2 g5 (14...Nb6 15.Rc1 Rc8 16.0-0=) 15.0-0 (15.Rc1 a6=) 15...Nb6 (15...0-0 16.Rac1=) 16.Na4 (16.Rfc1 0-0=) 16...Nc4= 17.Nc5 Qe7 18.Rfd1 (18.Nc3 Nb2 19.Qb2 b6+=) 18...0-0 (18...b6 19.Na6=) 19.Rac1 (19.Nc3 Nb2 20.Qb2 b6+=) 19...Kh8 (19...b6!? 20.Na6 Rac8=) 20.Nc3+= Nb6 (20...Nb2 21.Qb2 b6 22.Na6+=) 21.N5a4 (21.a4 Rfd8+/-) 21...Qd6 (21...Na4 22.Qa4 Rfc8 23.Rd2+=) 22.Nc5 (22.Nb5 Qd8+=) 22...Rab8 (22...Ng4 23.h3 (23.Nb7? Qh2 24.Kf1 f5-+) 23...Qh2 24.Kf1=) 23.a4 (23.Nb5 Qd8 24.Na7+/-) 23...Nbd7?? (23...Ng4!? 24.h3 Qh2 25.Kf1 Nf6=+) 24.Nd7 (better 24.Nb5!? Qe7 25.Na7+/-) 24...Qd7+= 25.b5 b6 26.Ba3 Rfc8 27.g3 (better 27.Rd2!?+=) 27...Qh3-/+ 28.Bd6?? (better 28.Rd2-/+) 28...Ng4-+ 29.Rd2 (29.Ne4 de4 30.Qf7 Nh2 31.Bb8 Rf8-+) 29...Qh2 (29...Nh2 30.f3 Nf3 31.Kf2 Qh2 32.Kf1 Qg1 33.Ke2 Qg2 34.Kd1 Qd2) 30.Kf1-+ Qh1 (30...Ne3 31.fe3 Qd2 32.Qd1 Qe3 33.Bb8 Rc3 34.Rc3 Qc3 35.Kg2-+) 31.Ke2 Qc1 32.Nd5 (32.Bb8 Nh2 33.Rd1 Qc3 34.Qc3 Rc3 35.Ba7-+) 32...Qg1 (better 32...Nh2 33.Qd1 Qc4 34.Rd3 ed3 35.Qd3 Qa2 36.Qd2 Rc2-+) 33.Nc3 (33.Rc2 Qf2 34.Kd1 Rc2 35.Qc2 Qc2 36.Kc2-+) 33...Qf2 34.Kd1 Qf1 (better 34...Ne3 35.Kc1 Qe1 36.Kb2 Qd2 37.Kb1 Rc3 38.Qd1 Qd1 39.Kb2 Qd2 40.Kb1 Rc1) 35.Kc2 Rb7 (better 35...Ne3 36.Kb2 Nc4 37.Kc2 Nd2 38.Kd2 Qd3 39.Ke1 Bd4 40.Bb4-+) 36.Kb2 Ne3 37.Be5 (37.Ka2 Nc4 38.Rc2 Nd6-+) 37...Be5 (better 37...Nc4 38.Ka2 Nd2 39.Qb4-+) 38.de5 Nc4 39.Kc2 Nd2 40.Kd2 (40.Qa3 Qd3 41.Kb2 Nc4 42.Ka2 Qc2 43.Ka1 Na3 44.g4 Rc3 45.e6 Qb1) 40...Qf2 (40...Rd7 41.Kc2 Qd1 42.Kb2 Rd2 43.Ka3 Qc1 44.Kb4 Rd4 45.Qc4 Qb2) 41.Kc1 Rbc7 (41...Rbc7 42.Kd1 e3 43.Kc1 Rc3 44.Qc3 Rc3 45.Kb1 Qc2 46.Ka1 Ra3) 0-1. minnesotawild (2310) - Calculator123 (2095), Rated Blitz game, lichess.org, 2016.

5.e3 a5 6.b5=.

5.e3 a6 6.c4 g6 (6...e4 7.Nd4=) 7.Be2 Bg7 (7...e4 8.Nd4=) 8.0-0 Bg4 9.d4 e4 10.Ng5 (10.Nfd2 Be2 11.Qe2 Nbd7+=) 10...Be2 (10...Bd7 11.Nc3=) 11.Qe2 Nh5 (11...d5 12.Nc3 h6 13.Nh3+=) 12.f4 ef3 (12...h6 13.Nh3=) 13.Nf3 Bh6 (13...f5 14.Nc3+/–) 14.Bc1 (14.e4 Nd7+/–) 14...Nf4 (14...a5 15.b5+=) 15.Qc2+/– Nh5 16.Nc3 Be3 17.Be3 (17.Kh1 Bc1 18.Re1 Be3+/–) 17...Qe3 18.Rf2 0-0 (18...Kd8 19.Nd5 Qh6 20.Qe4+–) 19.Nd5+– Qf2?? (better is 19...Qh6 20.Nc7 Ra7+–) 20.Qf2 Rc8 (20...Nd7+–) 21.Ne7 Kg7 22.Nc8 Nc6 23.d5 Rc8 24.dc6 bc6 1–0. DEFFM – GuestCRMR, freechess.org, 2017.

5.e3 g6 6.d4 e4 7.Nfd2 Bg7 8.c4 0-0 9.Nc3 c6 10.Qb3 h5 11.Be2 Bf5 12.h3 h4 13.0-0-0 (better 13.0-0!?+=) 13...a5 14.b5 Nbd7 (14...a4 15.Qc2=+) 15.g4= Be6 16.Nde4 Ne4 17.Ne4 Bc4 18.Bc4 Qe4 19.Bd3 Qf3 20.Bg6 d5 (20...a4!? 21.Qa2 cb5=) 21.Bf5+/- Nb6 Black intends a4 (21...Rfd8!?+/-) 22.bc6+- Nc4 23.c7 (23.cb7 Rab8 24.Rdf1 Nd6+-) 23...a4? (better 23...Qf2!? 24.Rde1 Bh6 25.Qb7 Be3 26.Kb1 Bd4 27.Bd4 Na3 28.Ka1 Qd4 29.Ka2 Qc5=) 24.Qb7 Qf2 25.c8Q (better 25.Rhf1!? Qg2 26.Rfe1+-) 25...Rac8+= 26.Bc8 Nb2 27.Qb2 Rc8 28.Kb1 Qf6?? (better 28...Qe3 29.Ka2 Rc3=) 29.Rhf1+- Qd8 (29...Qd6 30.Ka2+-) 30.Ka1 Rb8 31.Qc3?? (31.Qc2 Qe7 32.Rd3 Bh6+-) 31...Qd6?? (31...Rb3 32.Qc1=) 32.Rf2?? (better 32.Rb1+-) 32...Rb3= 33.Qc8 Kh7? (33...Bf8 34.Ra2=) 34.Ra2 (34.Qf5!? Qg6 35.Re1 Kg8+-) 34...Ra3 (better 34...Re3!? 35.Qf5 Kg8=) 35.Qf5+- Kg8 36.Qc8 (36.Rc1!? Bf6 37.Rc8 Kg7+/-) 36...Kh7 (better 36...Bf8!? 37.Qc2 Re3 38.Ra4 Rh3=) 37.Qc2+/- Kh8 38.Rd3 Ra2 (38...Rd3 39.Qd3 Qb4 40.Rb2 Qe1 41.Qb1+-) 39.Ka2+- Qb4 (39...Bf8 40.Qf2 (40.Qa4?! Qh2 41.Kb3 Qh1+-) 40...Kg8 41.Qh4+-) 40.Rc3 (better 40.Ra3 Bf6 41.Ra4+-) 40...Qb5?? (better 40...Bf8+/-) 41.Rc8+- Bf8 42.Rf8 Kg7 43.Rc8 Qb3 (43...Qb7+-) 44.Qb3 ab3 45.Kb3 1-0. ZibbitVideos (2435) - tueurcompulsif (2275), Rated Blitz game, lichess.org, 2016.

6.c4 Bg4 (6...e4 7.Nd4=) 7.Be2 Nbd7 8.0-0 h5 (8...e4 9.Nd4 Be2 10.Qe2=) 9.d4 (9.h3 Bf5+=) 9...e4 10.Nfd2 c6 (10...d5 11.Nc3+=) 11.Nc3 a6 (11...d5 12.cd5 cd5 13.Rc1+=) 12.a4 White prepares the advance b5 (12.d5 Ne5+=) 12...Bf5 (12...d5 13.c5=) 13.b5 (13.d5 cd5 14.Nd5 Nd5 15.cd5 Qg5+=) 13...h4 (13...Qe6 14.a5+=) 14.bc6 (14.h3 Qe6+/–) 14...bc6+= 15.Ba3 (15.h3 c5+/–) 15...g5 (15...Qe6 16.d5 Qe5 17.Bb2+=) 16.d5 (16.a5 Bg7+=) 16...c5 17.Qc2 Increases the pressure on e4 (17.Bb2 Bg7+=) 17...g4 (17...Bg7 18.Bb2 Rb8 19.Rab1=) 18.Rfb1 (better is 18.Bb2 Rg8 19.Ra3=) 18...Qe5?? (better is 18...Bg7=) 19.Bb2+– Qe7 (19...Rb8 20.Nd1 Rb2 21.Rb2+–) 20.Nce4! Ne4 (20...Be4 21.f3 Double attack (21.f3 Decoy); 20...Ne4 21.f3 Double attack (21.Bh8 Pinning; 21.Bh8 Deflection; 21.f3 Decoy; 21.Bh8 Clearance)) 21.Bh8 f6? (21...Nd2 22.Qf5 Nb1 23.Rb1 g3+–) 22.Ne4 (22.Bg4!? Bg4 23.Ne4 f5+–) 22...Be4 23.Bd3 (23.Bd3 Bd3 24.Qd3+–) 1–0. Wall,Bill – Lapu, internet, 1999.

6.Be2 Be6=.

6.Be2 g5 7.0-0 Bg4 8.d3 Nbd7 9.Nbd2 Bg7 10.c4 0-0 11.h3 Bh5 12.Nh2 Bg6 13.Qb3 Rab8 14.Bf3 c6 15.Ng4 h5 16.Nf6 Nf6 17.Rac1 g4 18.hg4 hg4 19.Be2 Rfe8 20.g3 Qe6 21.Kg2 d5 22.Rh1 e4 23.Bf6 Time forfeit 1-0. itaca (1870) - ramutol (1650), Rated Blitz game, lichess.org, 2015.

6.Be2 g5 7.Nc3 Bg7+=.

6.Be2 g5 7.g3 Bg4 (7...Bg7 8.0-0=) 8.0-0 Bg7 9.d3 Nbd7 10.Nbd2 0-0-0 11.c4 Bh3 12.Re1 Bf5 Black plans e4 13.Qa4 Kb8 14.b5 Nb6 (14...Nc5 15.Qc2=) 15.Qb3 Rhe8 (15...Nbd7 16.a4=) 16.a4+= e4?? (better 16...Nbd7+=) 17.Nd4+- Bg6? (better 17...Bc8 18.Ne4 Ne4 19.de4 Bd4 20.ed4 Qe4+-) 18.a5 Nbd7 19.a6 Nc5 (19...c5 20.bc6 Nc5+-) 20.Qa3 Nd3 (20...c6 21.ab7 Qb7 22.bc6 Qa6 23.Qb4 Qb6 24.c7 Kc7 25.Ra7 Qa7 26.Nb5 Kd7 27.Na7 ed3+-) 21.ab7 (21.ab7 Kb7 22.Qa6 Kb8 23.Nc6 Ka8 24.Qa7) 1-0. itaca (1905) – ramutol, Rated Blitz game, lichess.org, 2015.

5.Nd4 c5 6.Nb5 Qd8 (6...d5 7.bc5 Qc5 8.e3=+) 7.Be5 (better 7.Bf6!? Qf6 8.N1c3+=) 7...d6= 8.Bb2 (8.Bf6 gf6 (8...Qf6? 9.Nc7 Kd8 10.Nc3+–) 9.d3 Bd7=+) 8...Bd7 (8...Nc6!?–/+) 9.e3 (better 9.Bf6 gf6 10.N5c3=) 9...Nd5?? (better 9...Nc6!?=+) 10.c4 (10.bc5!? dc5 11.Qh5+–) 10...Bb5 (10...Nf6 11.Bf6 gf6 12.d3+=) 11.cd5 Bf1 12.Kf1 cb4 13.Qg4 (13.ab4 Nd7+–) 13...ba3 (13...Na6 14.Qe4 Qe7 15.Qf3+=) 14.Qe4 (better 14.Na3 f6 15.Qe4 Qe7 16.Qf3+–) 14...Be7?? (better 14...Qe7 15.Qe7 Be7 16.Bg7 Rg8+–) 15.Bg7+– Rg8 16.Qh7 Rg7 17.Qg7 Bf6 (17...Nd7 18.Qh8 Nf8 19.Qc3+– (19.Na3 Bf6 20.Qh6 Ba1=+; 19.Ra3 Bf6 20.Qg8 b5+–)) 18.Qg8 Ke7 19.Qd8 Kd8 20.d4 Na6 21.Na3 Nb4 (21...Nc7 22.Ke2+–) 22.Nb5 Nc2 (22...Nd5 23.Ke2 a5 24.Nd6 Kc7 25.Nf7 Kd7+–) 23.Ra7 Ra7 24.Na7 Kd7 (24...Nb4 25.Nb5 Kd7 26.Nc3+–) 25.Ke2 Nb4 (25...Na3 26.Rc1 b5 27.Rc3+–) 26.Rb1 Nd5 27.Rb7 (27.Rb7 Kd8 28.Rf7+–) 1–0. GuestKRZF – guestHMS, freechess.org, 2019.

5.Nd4 d5 6.e3 Bg4 7.Be2 h5 (7...Be2 8.Qe2 a5 9.b5=) 8.h3 (8.0-0 Nbd7=) 8...Bd7 (8...Be2 9.Qe2 Nbd7 10.0-0=) 9.c4 (9.0-0 a5 10.Nc3 Nc6+=) 9...Nc6 (9...dc4 10.Bc4 Nc6 11.Nc6 Bc6 12.0-0=) 10.cd5+= Ne5 (10...Nd5 11.d3+= (worse 11.Bh5 Qg5 12.g4 Ne5–/+)) 11.0-0 (11.Nc3 0-0-0+–) 11...g5 (11...Nd5 12.Qc2 f5 13.Nc3 Nc3 14.Qc3+– (14.dc3?! g5=)) 12.f4 (12.Qc2 0-0-0+–) 12...gf4 13.Rf4 (better 13.ef4 Ng6 14.f5+–) 13...Bh6? (better 13...0-0-0 14.Nf5 Bf5 15.Rf5 Rd5+–) 14.Nf5+– Bf5 15.Rf5 Ned7 (15...Nfd7+–) 16.Bb5 (16.Bh5?! Bg7 17.Be2 Qd6+–) 16...Bg7 (16...0-0 17.Bd7 Nd7 18.Qh5 Kh7+–) 17.Bd7 (better 17.Re5! Qe5 18.Be5 0-0-0 19.Bd7 Rd7+–) 17...Qd7? (better 17...Kd7!? 18.d3 Ne8 19.Bg7 Ng7+–) 18.Rf6 (18.Qf1 Rh6 19.Bf6 Rf6 20.Rf6 Qe7 21.Qb5 Kd8 22.Qb7 Rc8 23.Rf7 Qf7+–) 18...Bf6 (18...0-0-0 19.Qf1 Bf6 20.Bf6 (20.Qf6?! Rhg8 21.Kh1 Rg3+–) 20...Qd5 21.Qf4+–) 19.Bf6 Rg8 (19...Rh6 20.Bg5 Rh8+–) 20.Qh5 Qd6 21.Qe5 (better 21.Qf5!? Qg3 22.Qe4 Kd7+–) 21...Qe5 22.Be5 0-0-0 (22...Rg5 23.Bc7 Rd5 24.Nc3 Rd2 25.Ne4+–) 23.Nc3 f5 (23...Rde8 24.Bd4 f5 25.Rc1+–) 24.Rf1 Rgf8 25.Bf4 (25.Bg7 Rf7 26.Bd4 Rdf8+–) 25...Rf7 (25...Rg8 26.h4 Rh8 27.Bg5+–) 26.Rc1 c6 27.d6 (27.g4 Rg8+–) 27...Kd7 (27...Rg8 28.b5 Rfg7 29.g3+–) 28.b5 (28.d3 ed3 29.Rd1 b6+–) 28...c5 (28...Rc8 29.Rb1+–) 29.Nd5 b6 30.a4 (30.Rc4 Rdf8+–) 30...Ke6 31.Nc7 Kd7 32.Nd5 (32.a5 Rg7 33.ab6 ab6+–) 32...Ke6 33.h4 (33.Ne7 Rd6 34.Bd6 Kd6+–) 33...Rh7?? (33...Kd5 34.Kh2+=) 34.g3 (34.Nc7 Kd7 35.g3 Rg8+–) 34...Rg8?? (better 34...Kd5 35.Kg2 a6=) 35.Kf2 (better 35.Nc7 Kd7 36.Kf2+–) 35…Kd5+=. GuestWYZP – GuestRTYN, freechess.org, 2018.

5.Nd4 d5 6.h3 a5 7.b5 Qd7 8.e3 Bd6 9.Nc3 0-0 10.g4 Be5 11.Nce2 Qe7 12.Rg1 c5 13.bc6 bc6 14.c3 c5 15.Nf5 (15.f4 Bd6 16.Nb5 c4+=) 15...Bf5–/+ 16.gf5 Nc6 17.d4 ed3! 18.Qd3 Bh2 19.Rg2 Ne5 20.Qc2 Nf3 21.Kd1 Be5 22.c4? (better is 22.Ng3–/+) 22...Rfd8 23.Kc1 (23.Be5 Qe5 (23...Ne5?! 24.Nf4–+) 24.Ra2 dc4 25.Kc1 Rd2 26.Qd2 Nd2 27.Kd2 Ne4 28.Ke1 Rd8–+) 23...Ne1 24.Qd2 Ng2 25.Bg2 dc4 26.Qc2. nbh999 (2080) – Alissa (2280), ChessWorld.net, 2003.

5.Nd4 g6 6.e3 Bg7 7.c4 0-0 8.b5 d6 9.a4 Bg4 10.Be2 Be2 11.Qe2 Nh5 12.0-0 c6 13.Nc3 c5 14.Nc2 Bc3 15.Bc3 f5 16.Rfe1 Qg5 17.d3 f4 18.de4 f3 19.Qf1 Nd7 20.Rad1 Qg4 21.Rd6 Ndf6 22.Bf6 Nf6 23.Red1 Ne4 24.g3 Ng5 25.Kh1 Qh3 26.R1d5 Qf1 0-1. fracton - RamonSP (1655), Rated Blitz game, lichess.org.

4.d4 ed4 5.Qd4+/– f6 6.Nc3 Nc6 7.Qc4 a6 8.Nd5 Qd6 (better is 8...Qd8!?+/–) 9.Rd1+– a5? (better is 9...Kd8+–) 10.Nf6! Nf6 (10...Qf6 11.Bf6 Nf6 12.b5+–) 11.Rd6 Bd6 12.Bf6 Rf8 13.Qe4 Kf7 14.Bb2 Re8 (14...ab4 15.Nf3 Be7 16.ab4 Bb4 17.Kd1+–) 15.Qc4 Ke7 (15...Kf8 16.b5 Ne5+–) 16.Qh4 Kf8 (16...g5 17.Qg5 Ke6 18.Qf6 Kd5 19.Qf7 Re6 20.e4 Ke4 21.Qf3) 17.Qf6 Kg8 18.Qg7 1–0. Ritschel,Stephan (1935) – Tsobas,Christos (1710), RSS7E easy–2, 2003.

4.d4 e4 5.c4 =.

4.d4 Bg7 5.d5 (5.de5 Be5 6.Be5 Qe5+=) 5...d6 (5...Nf6 6.Nf3=) 6.e3 f5 7.c4 (7.Nf3 Nf6=) 7...Nd7 (7...Nf6 8.Nf3=) 8.Nd2 Ngf6 9.Be2 0-0 10.Ngf3 h6 (10...e4 11.Nd4 Ne5 12.0-0=) 11.Qb3 Kh7 12.g3 (12.0-0 c6+=) 12...a5 (12...e4 13.Nd4 Ne5 14.0-0=) 13.0-0 c6 14.ba5 (14.Qd3 e4 15.Qc2 ef3 16.Bf3 cd5 17.cd5 Ne5–+) 14...Ra5 (14...Nc5 15.Qb6 cd5 16.Rac1–/+) 15.Qb4 Ra6 16.dc6 bc6 17.c5 dc5 The passed pawn on a3 quickly leads to threats 18.Qh4 Rb6 19.Nc4 e5 draws heavy fire 19...Ba6? (better is 19...Rb3!? 20.Be5 Ne5 21.Nfe5 g5+=) 20.Nb6+– Be2 21.Nd7 Bf3 (21...Qd7 22.Ne5 Qe6 23.Rfb1+–) 22.Nf8 Bf8 23.a4 g5 24.Qh3 Qe6 25.a5 g4 26.Qh4 Be7 White now must not overlook the idea Ne8 27.a6 c4? (27...Ne4 28.Qh5+–) 28.Bc1 (better is 28.a7!? Ne4 29.Qe7 Qe7+–) 28...Ng8 (28...Ne4 29.Qh5 Nf6+/–) 29.Qh5+/– Nf6 30.Qh6?? (better is 30.a7 Nh5 31.a8Q+=) 30...Kh6–+ 31.a7 Qf7? (31...c5 32.e4 Kg7 33.a8Q Ne4 34.Qe8+/–) 32.e4 (32.a8Q!? Kg7 33.Ra7+–) 32...Kh7 33.Bg5?? (33.a8Q Ne4 34.Qc6–/+) 33...Qh5 (better is 33...Nd7 34.a8Q Bg5 35.ef5 c3–/+ (worse is 35...Qf5 36.Ra7+–)) 34.Bh4 Ng8 (34...Ne4 35.a8Q Nc3+/–) 35.a8Q Bh4 36.gh4 Qh4 (36...Be4 37.Ra7 Kh8+–) 37.Ra7 Kh8 Plans Qh3 38.Qe8 (better is 38.Qb7 Qh6 39.ef5+–) 38...Be4? (38...fe4 39.Rc1 Be2 40.Qe5 Qf6 41.Qe4+–) 39.Qe5 (39.Rf7 Bd3 40.Re1+– (40.Qe5 Nf6 41.Ra1 Kg8+–)) 39...Qf6 40.Qc7 Threatening mate: Qh7 40...Qh6 41.Rd1 c3 42.Qe5 Qf6 43.Rdd7 1–0. De Cat,Ben – Andersen,Ole Bo (2225), NATO–ch Germany, 1989.

4.e3 d5 5.f4 Bg7 6.Nf3 (6.fe5 Nc6 7.Bb5 Be5 8.Be5 Qe5 9.Nc3 Nf6 10.Nf3 Qd6 11.0-0) 6...Nd7 (6...f6 7.fe5 (7.Nc3 Be6 8.fe5 fe5 9.Be2 Nd7 10.0-0 0-0-0 11.e4) 7...fe5 8.Be2= (8.Bb5 Bd7 9.Qe2 Bb5 10.Qb5 c6 11.Qa5) 8...Nf6 9.0-0 e4 10.Nd4 0-0 11.Nc3) 7.Be2 (7.Nc3 c6 8.Bd3 Nh6 9.0-0 0-0 10.Ng5 f6 11.Nh3) 7...Nh6 (7...f6 8.Nc3 Nb6 9.0-0= Bf5 10.Nh4 Nh6 11.a4) 8.c4 (8.0-0 Nf5+= (8...0-0 9.Nc3 c6 10.Ne5 Ne5 11.fe5) 9.Nc3 c6 10.g4 Nd6 11.Qe1; 8.Nc3 c6 9.fe5 Ne5 10.Ne5 Be5 11.0-0) 8...d4 (8...dc4 9.Bc4 (9.0-0 0-0 10.Nc3 ef4 11.Nd5) 9...0-0 10.0-0= Nb6 11.Bb3) 9.fe5+= (9.ed4 ef4 10.0-0 0-0 11.Nc3) 9...de3 10.de3 (10.d4 f6+= (10...0-0 11.0-0) 11.Nc3) 10...0-0 (10...Nf5 11.Nc3= (11.Qd3=)) 11.Qd5 (11.Nc3!?+=) 11...Ng4= 12.Qe4 (12.Bd4 Rd8 (worse is 12...Be5 13.Ne5 Nde5 14.0-0+=) 13.Qe4 Nde5 14.Ne5 Ne5+=) 12...Nge5 (12...f5 13.Qf4=) 13.Nc3 (13.Ne5 Ne5 14.0-0 f5+=) 13...c6 (13...Re8=) 14.h4 (14.0-0 f5 15.Qc2 Ng4+=) 14...Re8 (14...f5 15.Qf4–/+) 15.Nd1? (15.h5!?+=) 15...Nf3 (15...a5 16.Nc3–+) 16.Qf3–/+ Bb2 (16...Ne5 17.Qf1–/+) 17.Nb2 Qe3 (17...a5 18.b5+=) 18.Qe3+= Re3 19.Kf2 Re7 20.Rad1 Nf6 (20...a5+=) 21.h5 (21.Rd8!? Re8 22.Re8 Ne8 23.Rd1+=) 21...Bf5 (21...Ne4 22.Kf3–/+) 22.hg6 0–1. Torres Herrero,F – Garcia Herguedas,F, Valladolid, 1987.

5.c4 c6 6.Nf3 Nh6 7.h3 0-0 8.e4 f5 9.d3 f4 10.Nbd2 d6 11.Qb3 Nf7 12.Be2 Be6 13.g4 Nd7 14.0-0-0 b5 15.Qc2 Nb6 16.Rdg1 bc4 17.dc4 d5 18.c5 de4 19.Ne4 Nd5 20.h4 Nf6 21.h5 Ng4 22.hg6 hg6 23.Nh4 g5 24.Ng6 Qd7 25.Nf8 Rf8 26.Nf6 Nf6 27.Bd3 Re8 28.Bh7 Kf8 29.Bg6 Rd8 30.Bf7 Bf7 31.Rg5 Qd3 32.Qd3 Rd3 33.Be5 Ra3 34.Rd1 Bd5 35.Rf5 Kf7 36.Rg1 Ke6 37.Rgg5 Bh6 38.Rf6 Ke7 39.Rh6 Rh3 40.Rh3 Bg2 41.Rh6 Bd5 42.Rg7 Bf7 43.Rf6 Kf8 44.Rff7 Ke8 45.Bd6 a5 46.Rf8 Normal 1-0. Peltu_Yono (1815) - slhkrktt (1820), Rated Classical game, lichess.org, 2015.

5.Nf3 d6 6.c4 f5 7.d4 Nf6 (7...ed4 8.Bd4 Bd4 9.Nd4+=) 8.de5+= Ng4? (better 8...de5 9.Be5 Nc6+=) 9.ed6+- cd6 10.Bg7 Qg7 11.Nbd2 (11.Ra2 Qe7+-) 11...0-0 12.h3 Ne5 13.Be2 Be6 14.0-0 h6 15.Rc1 Nbc6 16.c5 (16.b5 Nd8+-) 16...dc5+/- 17.Rc5 Rad8 18.Qa4 (18.Qc2 Nd7 19.Rc3 f4+-) 18...Nf3 (18...Nd7 19.Rcc1+/-) 19.Nf3+- Bd5 (19...Rfe8 20.Rfc1+-) 20.Rd5! Rd5 21.Bc4 Rfd8 22.Qb3 (22.Rd1 Ne7+-) 22...Ne7 (22...Qf7 23.Rc1+/-) 23.Rd1 (23.Bd5!? Rd5 24.Rc1 Kf8+-) 23...Qf7 24.Kh2 (24.Bd5 Rd5 25.Rc1 Rd6+-) 24...Kh7 25.Bd5 Rd5 26.Rd5 Nd5 27.Nd4 Qc7 28.g3 Nf6 (28...Qd7 29.f3+/-) 29.Qe6+- Kg7 (29...Qg7 30.g4 fg4 31.hg4+-) 30.Qf5! Qg3? (30...gf5 31.Ne6 Double attack) 31.Kg3 gf5 32.Nf5 Kg6 33.Ne7 (33.Nd6!? b6+-) 33...Kf7 34.Nf5 Kg6 35.Kf4 (35.Nd6 b6+-) 35...Nd5 36.Ke5 Nc3 37.h4 (37.f4 Nb5+-) 37...Nb1 38.a4 Nc3 39.a5 Na2 40.b5 Nc3 (40...Nc1 41.Nd6 b6 42.a6 Nd3 43.Kd4 Nf2 44.Nc8+-) 41.Nd6 Kh5 42.b6 (better 42.Kd4 Ne2 43.Kc5+-) 42...ab6 43.ab6 Na4 (43...Kh4 44.f4 Na4 45.Ke6 Nb6 46.f5+- (worse 46.Nb7 Kg4+-)) 44.Nc4 Kh4 45.Kf4 (45.f4 h5 46.f5 Nc5+-) 45...h5 46.e4 Nc5 47.e5 Kh3 48.Nd6 Kg2 49.Kg5 Kf2 (49...h4 50.Kh4 Nd3 51.f4+-) 50.Kh5 (50.Nb7 Nb7 51.e6 Ke3+-) 50...Ke3 (50...Nd3 51.Nc4 Kf3+-) 51.Nb7! Nb7 52.e6 Nd6 53.e7 Kd4 54.b7! (54.b7 Nb7 55.e8Q+-) 1-0. zembelek (2065) - Pterodactyl (2255), Rated Blitz game, lichess.org, 2013.

5.Nf3 d6 6.d4 Bg4 7.Be2 Nc6 8.de5 de5 9.b5 Rd8 10.Nbd2 Nb8 11.0-0 Nd7 12.h3 Be6 13.Qc1 h6 14.Ne4 Bd5 15.Ng3 b6 (15...f5!?=) 16.c4 Bb7 17.a4 Ngf6 Black prepares e4 18.a5 0-0 19.ab6 ab6 20.Rd1 e4 21.Nd4 Ra8 22.Ra8 Ra8 23.Qc2 Nc5 24.Ra1 Ra1 25.Ba1 Nfd7 (25...Qd6 26.Nb3 Nb3 27.Qb3=) 26.Bc3 (better 26.Ndf5!? gf5 27.Nf5+/-) 26...Ne5 27.Bb4 f5 28.Bf1 Kh7 29.Nge2 Ned7 (29...Ned3 30.Bc5 bc5 31.Nb3=+) 30.g3 Be5 31.Kh2 Bd6 32.Bc5 bc5 33.Nb3 Ne5 34.Nf4 Nf3 35.Kh1 g5 36.Nd5 Qe5 37.Be2 Bd5 38.cd5 Qd5 39.Bf3 ef3 40.Kh2 The isolani on c5 becomes a target 40...Kg7 (40...c4 41.Nd2 Qd3 42.Qc4 Qd2 43.Qf7 Kh8 44.Qf6 Kg8 45.Qg6 Kf8 46.Qf5 Ke8 47.Qf3-/+) 41.Nd2 g4 42.h4 Qf7 43.Qc3? (better 43.Nc4!? Be7 44.Ne5=+) 43...Qf6-+ 44.Qf6 (44.Nb1-+) 44...Kf6 45.Nc4 Be5 (45...Ke6 46.b6 cb6 47.Nb6-+) 46.Kg1 Bc3 47.Kf1 Ke6 48.b6 cb6 49.Nb6 h5 50.Nc4 Kd5 51.Nb6 Ke4 52.Nd7? (52.Na4 Bb4 53.Nb2 Bd2-+) 52...Bb4 (better 52...c4!? 53.Nb6 Kd3 54.Nd7-+) 53.Nf6 Kd3 54.Nh5 c4 55.Nf4 Kd2 56.h5?? (56.Ne6 c3 57.Nd4 c2 58.Nc2 Kc2-+) 56...Bf8 (56...c3 57.Kg1 c2 58.Ne6 c1Q 59.Kh2 Qf1 60.Nf4 Qf2 61.Kh1 Qf1 62.Kh2 f2 63.e4 Qg1) 57.Nd5 c3 Black intends e4 58.Nc3 Kc3 59.Ke1 Kc2 60.Kf1 Kd2 61.Kg1 Ke2 (61...Ke2 62.h6 Bh6 63.Kh2 Be3 64.Kg1 Bf2 65.Kh2 Be3 66.Kh1 f2 67.Kh2 f4 68.Kh1 f1Q 69.Kh2 Qh3) 0-1. muhammadaudii (2140) - DUENDECILLOH (2200), Black Lives Matter, lichess.org, 2020.

5.d4 d6 6.de5 de5 7.g3 a6 8.Bh3 Bh3 9.Rg1 Nc6 10.g4 Rd8 11.Qc1 Bh6 12.e3 Nf6 13.g5 Bg5 14.Ng5 Ne4 15.Ne4 0-0 16.Nc5 b6 17.Ne4 f6 18.b5 ab5 19.Nbc3 f5 20.Ng3 f4 21.Nge4 Bf5 22.Nd2 fe3 23.fe3 Qh4 24.Rg3 Qh2 25.Nf1 Qh4 26.Nb5 Bh3 27.Nc7 Rf1 28.Ke2 Rc1 29.Rc1 Qg3 30.Ne6 Qg2 31.Ke1 Qf1 0-1. boryo84 (1645) – EdgerChess, Rated Classical game, lichess.org.

5.e3 a5 6.b5 d5 (6...d6 7.Be2=) 7.c4+= dc4 8.Bc4 Nd7 9.Nc3 (9.Qc2 Nb6+=) 9...a4 (9...Ngf6!?=) 10.Nd5 Qd6 (10...Qd8+/-) 11.Bc3?? (better 11.Ng5 Nc5 12.d4+-) 11...c6+= 12.Bb4 (12.bc6!? bc6 13.Nb4=) 12...Qb8=+ 13.bc6 bc6 14.Ng5 Nh6 (14...cd5 15.Bd5 Nh6 16.Qf3+=) 15.Nc3 Attacks the isolani on a4 (better 15.Nc7! Qc7 16.Bf7 Nf7 17.Ne6=) 15...c5-/+ 16.Qf3 0-0 (16...cb4 17.Bf7 Ke7 18.Nd5 Kd6 19.Ne4 Kc6 20.Rc1 Kb7 21.Ne7+- (worse 21.Nb4 Kb6 22.Nc6 Qb7+-)) 17.Rb1 cb4 18.Rb4 Qa7 19.Nb5 (19.Ra4 Qa4 20.Na4 Ra4 21.Nf7 Nf7 22.Bf7 Kh8 23.Qc6 Ra3 24.0-0=+) 19...Qa5-+ 20.Nd6 Ba6 21.Bd5 (21.Ngf7 Nf7 22.Bf7 Kh8 23.Qd5-+) 21...Qc7?? (better 21...e4 22.Qe4 Qc5-+) 22.Ba8? (22.Ndf7 Nf7 23.Nf7-+) 22...Qd6 (better 22...Nc5 23.Be4 Qd6-+) 23.d4? (23.Ne4 Qd3 24.Nc3 Nc5-/+) 23...Qc7?? (23...Rc8 24.Ne4 Qf8 25.Bb7 Bb7 26.Rb7 Rc1 27.Ke2 Rh1 28.Rd7 ed4 29.Nf6 Kh8 30.Rd4-+) 24.Kd2? (better 24.Qc6 Qc8 25.Ra4 Qa8 26.Ra6-+) 24...ed4 25.Rc1 (25.ed4 Ne5! 26.de5 Rd8 27.Bd5 Qe5-+) 25...de3 26.fe3 Qd6 (26...Qd8 27.Qd5 Nf5 28.Nf3-+) 27.Bd5 (27.Qd5 Qh2 28.Qd7 Ra8-+) 27...Nf6 (27...Ne5!? 28.Qe4 Qd8 29.h4-+) 28.e4 Nd5 (28...Rd8 29.h4 Qe5 30.Rc5-+) 29.ed5 Nf5 (better 29...Rd8 30.Nh3-+) 30.Ke1? (30.Rc6 Qe7 31.Ne4-+) 30...Qe5 (30...Qh2 31.Kf2-+) 31.Kf2 Bc8 (better 31...Bh6 32.Re1 Qc7-+) 32.Kg1?? (32.Rd1-+) 32…Nd4 (32...Nd4 33.Rd4 Qd4 34.Qf2 Qd5-+) 0-1. bjoernsen (2305) - Davigator (2300), Rated Blitz game, lichess.org, 2016.

5.e3 d6 6.c4 Nf6 7.b5 0-0 8.Be2 e4 9.Nd4 c5 10.bc6 bc6 11.Nc3 d5 (11...c5 12.Nb3=) 12.a4 (12.cd5 cd5 13.0-0 Ba6=) 12...Qb7 (12...c5 13.Nc2+=) 13.Ba3 Re8 14.Rb1 Qd7 15.cd5 cd5 (better is 15...Nd5 16.0-0 Nf4=) 16.Bb5+/– Nc6?? (better is 16...Qd8 17.Be8 Qe8+–) 17.Bc6+– Qg4 18.Qg4 (18.Qg4 Bg4 19.Be8 Re8 20.Rb7+–) 1–0. GuestDPNV – GuestJPBT, freechess.org, 2017.

5.fe5 Be5 6.Be5 Qe5 7.Nc3 c6 8.Nf3 Qe7 9.e3 d5 10.Be2 Nf6 11.0-0 0-0 12.Qe1 Nbd7 13.Qh4 Re8 14.Ng5 Kg7 15.Rf2 (15.Qg3 Ne5+=) 15...h6= 16.Nf3 Ne4 17.Ne4 Qh4 18.Nh4 de4 19.Raf1 Ne5 20.d4 ed3 21.cd3 Be6 22.Nf3? (better 22.d4!? Nc4 23.Bc4 Bc4 24.Re1=+) 22...Ng4-+ 23.e4 Nf2 24.Kf2 Rad8 25.Ke3 f5 26.e5 g5 (26...Bd5 27.d4-+) 27.d4 Bd5 28.Ne1 f4 29.Kd3 Re5! 30.de5 Bg2 31.Kc2 Bf1 32.Bf1 g4 33.Ng2 Rf8 34.Kd3 (34.Kc3 g3 35.hg3 fg3-+) 34...Kg6 (34...g3!? 35.Ne1 gh2-+) 35.Ke4-/+ Kg5 Black prepares the advance f3 36.a4?? (36.Ne1 f3-/+) 36...h5 (36...f3 37.Ne3 Rf4 38.Kd3 Rb4 39.a5-+) 37.a5? (37.e6 h4-+) 37...h4 (better 37...f3 38.Ne1 Rf4 39.Ke3 Rb4-+) 38.Ne1 (38.e6 b6-+) 38...f3 39.e6 Kf6 (39...f2 40.Nd3 g3 41.hg3 hg3 42.e7=) 40.Kf4-/+ Rg8 41.Bc4 (41.Nd3 Ke6 42.Ne5 Rf8 43.Ke4 g3 44.hg3 hg3 45.Nf3 Kd6-/+) 41...Ke7 (better 41...f2 42.Ng2 h3-+) 42.Nc2?? (better 42.Ke3-+) 42...g3 43.hg3 hg3 (better 43...h3 44.Nd4 h2 45.Nf5 Kf6-+) 44.Kf3 (44.Ne1 g2 45.Nf3 Rf8 46.Kg3 Rf3 47.Kg2-+) 44...g2 45.Ne3 g1Q 46.Nf5 Kf6 47.e7 Qg4 48.Ke3 Qf5 (48...Qc4 49.Ng7 Kg7 50.Kd2 Kf6 51.Ke3 Qc3 52.Kf2 Qd2 53.Kf1 Rg2 54.e8N Ke5 55.Nd6 Qe2) 49.Bg8 Qe5 50.Kd3 Qe7 0-1. jhonores (2195) - agusnono324 (2015), Hourly SuperBlitz Arena, lichess.org, 2020.

5.Nf3 d6 6.fe5 d5 7.e3 Bg4 8.d4 b6? (8...f6 9.Be2+=) 9.Nbd2 (9.c4 dc4 10.Bc4 a5+–) 9...Nh6 (9...f6 10.c4 fe5 11.de5+/– (< 11.cd5 e4=+)) 10.Bd3 f6 11.0-0 (11.h3 Bf3 12.Qf3 c6 13.ef6 Bf6+/–) 11...fe5+= 12.de5 0-0 (12...Nf7 13.e4 Ne5 14.Qb1+/–) 13.c4+/– Bf5 (13...Nd7 14.cd5 Ne5 15.Be5 Be5 16.Rb1+/–) 14.e4 dc4? (better is 14...de4 15.Be4 c6+–) 15.ef5 (15.Nc4?! Be6+/–; 15.Bc4?! Be6+–) 15...cd3 16.f6 Bf6 17.Qb3 Rf7 (17...Qf7 18.ef6 Qb3 19.Nb3 Nd7+–) 18.ef6 Qe3 19.Kh1 Ng4 (19...Nd7 20.Rae1 Qf4+–) 20.Rae1 Qh6 (20...Nd7 21.Re3 Ne3 22.Re1+–) 21.Re8 Qf8 22.Rf8 Kf8 23.Ng5 Rd7 24.Ne6 Ke8 25.Ng7 Kf8 26.Qe6 Nc6 (26...Nf2 27.Rf2 Nc6 28.Qd7 Nd4 29.Qe7 Kg8 30.Ne6 Ne6 31.f7) 27.Qd7 1–0. Levin,Anatoly – Saul,Andres, Internet Section, 2004.

5.Nf3 d6 6.fe5 de5 7.e4 Nh6 8.Bc4 Nc6 9.Bb5 0-0 (9...Bd7 10.0-0=) 10.Nc3 (10.Bc6!? bc6 11.0-0+=) 10...Nd4 11.Bd3 Nf3 12.Qf3 (worse is 12.gf3 Qh4 13.Ke2 Be6+=) 12...Bg4 13.Qg3 Rad8 14.0-0 Qg5? (14...Be6 15.Na4+=) 15.Rf2?? (15.h3 Qd2 16.hg4 Qg5+–) 15...b6?? (better is 15...f5!? 16.h3 f4 17.Bc4 Kh8+=) 16.Nd1 (16.h3 c6+–) 16...Rde8? (16...Qh5 17.Ne3 f6 18.Bc4 (worse is 18.Ng4 Qg4 19.Qe3 c6+/–) 18...Kh8 19.b5+/– (19.Ng4?! Qg4 20.Qe3 f5+=)) 17.Ne3?? (17.h3 Kh8+–) 17...Re6?? (better is 17...f5 18.ef5 gf5 19.Bf5 Rf5 20.Rf5 Nf5 21.Qg4 Qg4 22.Ng4 Nd4+/–) 18.h3+– (18.Ng4?! Qg4 19.Qe3 Qh4+/–) 18...Rf6 19.Rf6 Bf6 20.hg4 Rd8 21.Rf1 Bg7 22.Rf2 c6 23.Kf1 (23.b5 cb5 24.Bb5 Rc8+–) 23...c5 (23...b5 24.Ke1+–) 24.bc5 bc5 25.Ke1 Rb8 26.Bc3 Rb1 27.Ke2 Rc1 28.Qf3 Qh4 (28...Rb1 29.Bc4 Rb7 30.d3+–) 29.g3 Qh1 (29...Qe7+–) 30.Qh1 Rh1 31.g5 Ng4 (31...f6 32.gf6 Bh8 33.Be5+–) 32.Ng4 Bf8 (32...Rb1 33.Be5 Be5 34.Ne5+–) 33.Be5 Bg7 34.Nf6 (better is 34.Bc4!? Be5 35.Ne5 Rh5 36.Rf7 Rg5 37.Rf5 Kg7 38.Rg5 a5+–) 34...Kh8 35.Bc3 h6 36.gh6 Rh6 37.Nd7 (37.Bc4 Rh3+–) 37...Bd4 (37...Bc3 38.dc3 Kg7 39.Bc4+–) 38.Bd4 Kg8 (38...cd4 39.Rf7 Rh3+–) 39.Nc5 Rh3 40.Kf3 (40.Bc4 Kh7 41.Rf7 Kh6+–) 40...g5 41.Nd7 Kh7 42.Kg4 Rh6 (42...Rg3 43.Kg3 f6 44.Bf6 a5 45.Nf8 Kg8 46.Bd4 g4 47.Bc4) 43.Rf7 Kg8 44.Rg7 Kh8 45.Rg5 (45.Rg6 Kh7 46.Nf8) 45...Kh7 (45...Rf6 46.Nf6 a6 47.Rg8) 46.e5 (46.Nf8) 46...Rg6 47.Bg6 (47.Rg6 a5 48.Nf6 Kh8 49.Rg8) 47...Kg7 (47...Kh6 48.e6 a6 49.Rh5 Kg6 50.Nf8) 48.Be8 Kh6 49.Rg6 (49.Nf6 a6 50.Rg6) 49...Kh7 50.Nf8 Kh8 51.e6 1–0. 1805DYDIDIDY – icke, mySchach.de, 2005.

5.Nf3 d6 6.fe5 Be5!? 7.Ne5 de5 +=.

4.b5 f5 5.e3 Qf7 (5...Nf6 6.Nf3+=) 6.Be2= Be7 7.Bh5 g6 8.Be2 Be6 9.Nc3 Nf6 (9...Nd7 10.Nf3+=) 10.Bb4 (10.Nf3 Ne4+=) 10...Nbd7 11.Nh3 h6 12.Bf3 e4 (12...0-0-0 13.d3–/+) 13.Be2+= Qg7 14.Nf4 Bf7 15.h4 (15.0-0 0-0-0+=) 15...Ne5 (15...0-0-0 16.Rh3–/+) 16.d4 Ned7 17.d5 Nb6 18.Qd4 Qg8 Now all is on d5 19.Rh3 (better is 19.0-0-0!?=) 19...Nfd5–/+ 20.Bc4?? (better is 20.Ncd5 Nd5 21.Nd5 Bd5 22.Bc3–/+) 20...Bf6–+ (20...Nb4?! 21.Bf7 Qf7 22.Qb4–+; 20...Nc4 21.Ncd5 c5 22.bc6 bc6 23.Nc7 Kf8 24.Na8+/–) 21.Bd5 (21.Qd5 Nd5 (21...Nc4?! 22.Qb7 Rd8 23.Rd1=) 22.Nfd5 Qg7 23.Nf6 Qf6–+) 21...Bd4 22.Bf7 Qf7 23.ed4 Kd7 (23...0-0-0 24.d5–+) 24.a3 (24.h5 g5 25.Ng6 Rhe8–+) 24...g5 25.hg5 (25.Nfe2 g4 26.Rg3 Kc8–+) 25...hg5 26.Nfe2 Rh3 27.gh3 Qh5 (27...Rh8 28.0-0-0–+) 28.Ng1 Re8 (28...Kc8 29.d5–+) 29.a4 (29.Ba5 Na8–+) 29...e3 (better is 29...Qh4 30.a5 e3–+) 30.f3 (30.fe3 Re3 31.Kf1–+) 30...Qh4 31.Ke2 (31.Kd1 Qd4 32.Kc1–+) 31...Qf2 0–1. Kientzler,Roland – Ziese,Gerhard, corr SOK–89–37, 1989.

4.b5 Nf6 5.Nf3 =+.

5.Nc3 Nc6 =+.

5.Nc3 Be6 =+.

5.Bd3 Bg4 6.Be2 Qe6 (6...Be6 7.Nc3+=) 7.c3 (better is 7.Nc3=) 7...h5?? (7...Be2 8.Qe2 d5 9.d3+=) 8.h3?? (better is 8.f3+–) 8...Be2+= 9.Ne2 (9.Qe2 d5 10.Qb5 Qc6 11.Qc6 Nc6 12.ed5 Nd5+=) 9...Ne4–/+ 10.0-0 d5 11.d3 Ng5 (11...Nf6 12.Nd4 Qb6 13.Re1+=) 12.d4 (12.f4 ef4 13.Nf4 Qd6+=) 12...Bd6+= 13.Qd2 (13.Bc1 Ne4+=) 13...Nh3 (13...Ne4 14.Qe3–/+) 14.Kh1 (14.gh3 Qh3 15.de5 Be5+=) 14...Nd7 (14...g5 15.Qd3 Nf4 16.Nf4 gf4 17.Qb5 Kd8 18.Nd2–+) 15.b5 (15.de5 Ne5 16.Qe3 Nf2 17.Qf2 Ng4–/+) 15...0-0-0 (15...Ba3 16.Na3 Qf5 17.Rad1–/+) 16.Bd6 cd6 (16...Qd6?! 17.gh3 Qf6 18.f4=) 17.Qe3 (better is 17.Kh2 Nf4! 18.Nf4 ef4 19.Qf4–/+) 17...Nf6?? (17...Nf4 18.Nf4 ef4 19.Qf4–+) 18.Qg3?? (better is 18.Qh3 Qh3 19.gh3+=) 18...Nf4!–+ 19.Nf4 ef4 (19...h4 20.Qf3 ef4 21.b6–+) 20.Qf4 h4 21.Nd2 h3 22.g3 h2 (22...Rde8 23.Rac1–+) 23.Nf3 (23.Rfe1 Qd7–/+) 23...Qh3 (23...Ne4 24.Rae1–/+) 24.Ng5 Qd7 25.a4 Nh5 (better is 25...Rde8!?–/+) 26.Qf7= Qg4 (26...Nf6!?=) 27.Qd5+/– Nf6 28.Qe6 Qe6 29.Ne6 Rd7 30.a5 (30.Rfe1 Re7 31.c4 Kd7+/–) 30...d5 (30...Ne4!? 31.c4 Rf7+=) 31.b6+/– a6 32.Rae1 (32.c4 Ne4 33.cd5 Rd5 34.Ng7 Kd7+/–) 32...Ne4 33.Re3 (better is 33.Kg2 Rd6 34.Nf4+/–) 33...Re7+= 34.c4?? (better is 34.Re4 de4 35.d5+=) 34...Re6–+ 35.cd5 (35.Kg2 dc4 36.Rh1 Kd7–+) 35...Re7 (better is 35...Nf2 36.Rf2 Re3–+) 36.Rc1 (36.Kg2 h1Q! 37.Rh1 Rh1–+) 36...Kd8 (36...Kd7 37.Rf3 Kd6 38.Kg2–+) 37.Rf3 Kd7?? (37...Nd6 38.Kg2–+) 38.g4?? (better is 38.Rc7 Kd6 39.Re7 Nf2 40.Rf2 Ke7 41.Rc2+– (41.Rh2 Rh2 42.Kh2 Kd6+–)) 38...Kd6–+ 39.Rf5 (39.Kg2 Kd5 40.Rh1 Rh4–+) 39...g6 40.Rf3 (40.Rf4 Kd5 41.Kg2 Rh6–+ (41...Kd4?! 42.f3–+)) 40...Kd5 41.Rd1 Rd7 (41...Rh4 42.Rc1–+) 42.Re1 (42.Rf4 Rh4–+) 42...Ng5 (42...Rh4 43.Rf8–+) 43.Re5? (43.Rfe3 Nf7 44.f3–+) 43...Kc4 (better is 43...Kd4 44.Rfe3 Nf3 45.Re7 Re7 46.Re7–+) 44.Rfe3 (44.Ra3 Kb4 45.Rd3 Nh3–+) 44...Rd4 45.Re1 Rg4 46.f4 (46.R5e3–+) 46...Nf3 47.R5e4 Kd5 48.Re5 (48.Rd1 Ke4 49.Rd4 Nd4 50.f5 Rg1) 48...Ne5 (48...Kc6 49.Rc5 Kc5 50.Rc1 Kd5 51.Rd1 Ke4 52.Rd4 Nd4 53.f5 Rg1) 49.Re5 Kd4 50.Rg5 (50.Re1 Rf4 51.Rc1–+) 50...Rf4 (50...Rg5 51.fg5 Ke3 52.Kg2 h1Q 53.Kg3 Qf3) 51.Rg1 (51.Rc5 Rf1 52.Kg2 h1Q 53.Kg3 Qf3) 51...Ke3 (51...hg1R 52.Kg1 Ke3 53.Kg2 Rg4 54.Kf1 Rh1) 52.Rg3 (52.Ra1–+) 52...Ke2 53.Rg2 Ke1 54.Rh2 (54.Rf2 g5 55.Rh2 Rh2 56.Kh2 Kf2 57.Kh3 Rh4) 54...Rf1 (54...Rh2 55.Kh2 Kf2 56.Kh3 g5 57.Kh2 Rh4) 55.Kg2 Rh2 56.Kh2 (56.Kg3 Rh5 57.Kg4 Ke2 58.Kg3 Rg1 59.Kf4 Rf5 60.Ke4 Rg4) 56...Kf2–+ 57.Kh3 Rg1 58.Kh2 (58.Kh4 Kf3 59.Kh3 Rh1) 58...Rg3 59.Kh1 Rh3 0–1. Goetzelmann,Klaus – Stoffers,Jeffrey, IECC, 1997.

4.Ba3 d6 5.ba6 Na6 6.Nc3=+.

4.Ba3 Qe6 5.Bf8= d5?? (better 5...Kf8 6.Nc3 d5=+) 6.Bg7+– Nc6 (6...ab5 7.Bh8 Bd7+–) 7.bc6 b5 8.Bh8 Nf6 9.e3 (9.Nf3 Kf8 10.Ng5 Qc6 11.Bf6 Bf5 12.Be5 f6+–) 9...Ne4 10.d3 Nc3 11.Nc3 d4 12.Ne4 Qc6 13.Nf6 (13.Be5 de3 14.fe3 Be6 15.Nf6 Kd8+–) 13...Kf8 14.e4 (14.Nf3 Qc3 15.Ke2 Bb7+–) 14...Be6 15.Nf3 Qc3 16.Ke2 Ke7 1–0. patrick317 – warrior23, gameknot.com, 2018.

4.a4 d5 5.e3 ab5 6.ab5 Ra1 7.Ba1 Nf6 8.Nf3 Nbd7 9.d4 ed4 (9...e4 10.Ne5+=) 10.Nd4 Qe4 11.Nc3 Bb4 12.Qd3 Nc5 13.Qd2 Qe7 14.f3 Nfe4 15.fe4 Ne4 16.Qd3 Qf6 (16...Qc5!?–/+) 17.Be2+= Nf2?? (better is 17...Qf2 18.Kd1 Qg2+=) 18.Qd2?? (better is 18.0-0 Nd3 19.Rf6 Bc3 20.Bc3 gf6 21.Bd3+–) 18...Nh1–+ 19.Bf3 c5 20.Nde2 (20.bc6 bc6 21.g3 Bh3–+) 20...Be6 21.Kf1 Qh4 22.Qe1 (22.Nf4 Qh2 23.Nfd5 Ng3 24.Kf2 Ba5–+) 22...Qh2 23.Bb2 Ke7 (23...0-0 24.Qd1–+) 24.Nf4 (24.Bd5 Rd8 25.e4 Rd7–+) 24...Rd8 Black prepares d4 25.Qd1 d4 (better is 25...Ng3!? 26.Kf2 Ne4 27.Be4 de4 28.Ncd5 Kf8 29.c4–+) 26.Nce2 (26.Ncd5 Bd5 27.Nd5 Kf8 28.Qa1–+) 26...Nf2! (26...Nf2 27.Qc1 de3–+) 0–1. Baer,Cy (1895) – Hoetker,Michael (2140), RSX7D – Oldenburg–1, 2007.

4.e3 d5 5.ba6 Na6 6.a4 Bf5 7.Nf3 Nf6 8.Ne5 Qe6 9.Bc3 Bd6 10.Bb5 Kd8 11.Nf3 c6 12.Be2 Ne4 13.Ng5 Ng5 14.Bg7 Rg8 15.Bc3 Be5 16.Be5 Qe5 17.Nc3 Ne4 18.Ne4 Be4 19.0-0 Rg2 20.Kh1 Qh2 0-1. 0203 – irakli, Rated Classical game, lichess.org, 2014.

4.e4 ab5 5.Bb5? (5.Qh5 Nc6 6.Nf3 Nf6–/+) 5...c6?? (better is 5...Qb4 6.Be5 Qb5 7.Bc7 Qc6 8.Bb8 Qe4 9.Ne2 Rb8–+) 6.Be2=+ Nf6 7.a4 g6 (7...Ne4!? 8.Nf3 f6–/+) 8.Ba3 d6 9.Nf3 (9.Nc3 Bg7=) 9...Bg7 (better is 9...Ne4!? 10.0-0 Bg7–/+) 10.Nc3= 0-0 11.d4 ed4 12.Nd4? (12.e5 Ne8 (< 12...dc3 13.Bd6 Qd8 14.Bf8 Qf8 15.ef6 Bf6 16.Qb1+=) 13.ed6 Nd6–/+) 12...Nfd7?? (12...Ne4 13.Bb2 Nf2 14.Kf2 Qh4 15.g3 Qd4 16.Qd4 Bd4 17.Kg2–+) 13.0-0? (13.Bb2=+) 13...Nb6?? (13...Qe5 14.Nb3 Qc3 15.Bd6–+) 14.Re1?? (14.Bb2 N6d7=) 14...Re8?? (better is 14...Qe5 15.a5 Qd4 16.ab6 Qd1 17.Red1 Bc3–+) 15.Bc4?? (better is 15.Bb2=) 15...Nc4–+ 16.Bd6 (16.Bc1–+) 0–1. GorillaTest – bard18, Live Game Caissa's Web, 2004.

4.Nf3 ab5 5.Be5 d6=.

6.Ba1 Qb4 7.e3 (7.Be5 d6 8.Bc3 Qb5+=) 7...d6= 8.Nc3 Be6 9.Nf3 Nd7 (9...Nf6 10.Ng5=) 10.Ng5+= Bc4 (10...Bg4!? 11.f3 Bh5+=) 11.Qf3 Ngf6 12.Qb7 Bf1 13.Qc8 Ke7 14.Rf1 Qa5 15.Qa6 Qb6 (better 15...Qa6!? 16.ba6 g6+–) 16.Qa2+– d5 17.Nd5 Nd5 18.Qd5 Qf6 (18...Qg6 19.f4 h6+–) 19.f4 h6 (19...Ke8 20.Qa8 Ke7 21.Bc3+–) 20.Be5 hg5 (20...Qg6 21.Bc7 hg5+–) 21.Bf6 gf6 22.fg5 Rh2 (22...Bg7 23.gf6 Bf6 24.g4+–) 23.gf6 (23.gf6 Nf6 24.Qe5 Kd8 25.Qh2+–) 1–0. onur604 (2285) – Trajano3333 (1985), lichess.org, 2020.

6.Ba1 b6 7.c4 Bb7 8.e3 (8.Qa4 Kd8+=) 8...Nf6 (8...e4 9.Ne2=) 9.Nf3 d6 10.Be2 g6 11.0-0 Bg7 12.Qc2 0-0 13.Nc3 Nbd7 14.Na4 (14.d4 ed4 15.ed4 d5=) 14...Nc5 15.Nc5 bc5 16.d3 Nd7 17.Bc3 Ra8 18.Ra1?? (better 18.Nd2=) 18...Ra1-+ 19.Ba1 Qd8?? (better 19...e4 20.Bg7 ef3-+) 20.Bc3 Qa8 21.Qb2 Qa4 (21...c6 22.Qc2=) 22.h3 h6 23.Nd2 Kh7 (23...Nb6 24.Bg4=) 24.Qb1 f5 25.Bd1 Qa3 (25...Qa8 26.e4=) 26.Qb2 Qb2 27.Bb2 Bf6 28.Nb3 Kg7 29.Na5 Ba8 30.Bc3 Kf7 31.Nb3 Ke6 32.Ba5 Nb6 33.Nd2 h5 34.Bf3 (34.e4 h4=) 34...Bf3=+ 35.Nf3 (35.gf3 Kd7=) 35...g5 (35...e4!? 36.Bb6 cb6 37.de4 fe4=+) 36.Nd2 g4 37.hg4 hg4 38.Kf1 (38.e4 Na8+=) 38...Bg5= 39.Ke2 Bh6 40.Nf1 Bg5 41.Ng3 (41.Bb6 cb6 42.e4 Kf6 43.ef5 Bf4+/-) 41...Bh4= 42.Nf1 Bg5 (42...e4 43.de4 fe4 44.Nd2=) 43.Nd2 (43.Bb6 cb6 44.e4 Kf6+=) 43...Bh4 (43...Bh6 44.Nb1+=) 44.Nb1 Bg5 (44...d5 45.Bb6 cb6 46.cd5 Kd5 47.Nc3 Kd6 48.e4 fe4 49.Ne4 Kd5 50.Nd2=) 45.Nc3 Bh4 (45...Na8 46.f3+=) 46.f4 (46.Bb6 cb6 47.Nd5 Bd8+/-) 46...ef4 47.ef4 (better 47.Bb6 cb6 48.ef4+/-) 47...Bg3? (47...Na8 48.Nd5 Kd7 49.Bc3+=) 48.Ke3 (48.Bb6 cb6 49.Nd5 Bh4 50.Nb6 Bd8+-) 48...Bh2? (better 48...Be1!?+=) 49.Ne2 d5 50.Bb6 cb6 51.g3 dc4?! (51...Ke7+-) 52.dc4 Kf6 53.Kf2 Kg6 54.Kg2 Bg3 55.Ng3 (worse 55.Kg3 Kf7+-) 55...Kf6 56.Kf2 Ke6 57.Ke3 (better 57.Nf5 Kf5 58.Kg3+-) 57...Kf6 58.Ne2 Ke6 59.Nc3 Kd6 60.Nd5 1-0. bjoernsen (2300) - BurashkaChe (2215), Rated Blitz game, lichess.org, 2016.

6.Ba1 b6 7.c4 Nf6 8.e3 d5 9.Nf3 Qb4 (better is 9...e4!? 10.Ne5 Be6=) 10.Bc3+/– Qc5 11.Ne5 Nbd7 12.Nd7 Bd7 13.Be2 (better is 13.Bf6 gf6 14.cd5 Qd5 15.Qa4+–) 13...dc4= 14.Bf6 gf6 15.d4 (better is 15.Nc3=) 15...Bb5?? (15...Qb4 16.Kf1 Bb5= (worse is 16...Qb5 17.Nc3 Qb3 18.Qa1=)) 16.0-0 (better is 16.dc5 Bc5 17.Bc4 Bc4 18.Qa4 Kf8 19.Qc4+–) 16...Qg5+= 17.Nc3 Ba6?? (better is 17...Rg8 18.g3 Bd7+/–) 18.Qa4+– Ke7 19.Qa6 Rg8 20.g3 f5 (20...Qf5 21.Qc4 Qc8 22.Ra1+–) 21.Qb7 Kd7 22.Qd5 Bd6 23.Qf7 Be7 24.Bc4 Rg6 25.e4 (better is 25.Bd3 Rf6 26.Qd5 Rd6 27.Bb5 c6 28.Bc6 Kc8 29.Qb5 Rc6 30.Qc6 Kd8 31.Ra1 Qg3 32.hg3 Ba3 33.Qb7 b5 34.Ra3 b4 35.Ra8) 25...Qd2 (25...f4+–) 26.Qf5 (26.Nd5 Rg3 27.hg3 Qg5 28.Ne7 Qe7 29.Qf5 Ke8 30.Ra1 Qe4 31.Qe4 Kf8 32.Qh7 c6 33.Qf7) 26...Kd8 27.Nb5 (better is 27.Ra1 Ba3 28.Qd5 Rd6 29.Qg8 Kd7 30.Qf7 Kd8 31.Ra3 Qc1 32.Kg2 Qa3 33.Nb5+–) 27...Qb4 (27...Qg5 28.Qg5 Bg5+–) 28.Qd5 (better is 28.Ra1 Qa5 29.Ra5 ba5 30.Qe5+–) 28...Kc8 29.Qf7 (29.Na7 Kb8 30.Ba6 c6 31.Qd7 Rg3 32.hg3 Qd4 33.Qb7) 29...Rf6 (29...Kd7 30.e5 Qa4+–) 30.Qe8 Kb7 31.Bd5 c6 32.Qd7 (32.Ra1 Qe1 33.Re1 Bc5 34.Ra1 Ba3 35.Ra3 cd5 36.Ra7) 32...Ka6 33.Bc6 Rc6 34.Ra1 (better is 34.Qc6 Qb2 35.Nc3+–) 34...Kb5 35.Qd5 (better is 35.d5 Qd6 36.Rb1 Ka6+–) 35...Bc5 36.dc5 Rc5 37.Qd3 (37.Qd7 Rc6 38.Qh7 Qd2+–) 37...Kc6 38.Qe3 (38.Ra7 Rc1 39.Kg2 Qd6+–) 38...h5 (38...Kb7 39.e5 Rc3 40.Qe1+–) 39.Rc1 (better is 39.Qh6!? Kb7 40.Qh7 Rc7+–) 39...Kb7 (39...Rc1 40.Qc1 Kd7 41.e5+–) 40.Rc5 (40.Rd1 h4+–) 40...bc5 41.e5 c4 (41...Kc7 42.f4+–) 42.Qe4 Kc7 43.e6 Qe7 (43...Qb5 44.e7 Qe8 45.Qc4 Kd7 46.Qb5 Ke7 47.Qe8 Ke8 48.Kg2+–) 44.Qe5 (44.Qc4!? Kd6+–) 44...Kc8 (44...Qd6 45.Qe2 Qd3 46.Qd3 cd3 47.Kf1+–) 45.Qd5 (45.h4 Qe8+–) 45...c3 46.Qb3 (better is 46.Qc6 Kd8 47.Qc3 Qe6 48.Qa5 Ke7 49.Qh5+–) 46...Kd8?? (46...Qc5 47.Qc2+–) 47.Kf1 (47.Qb8) 47...c2?? (47...Qc7 48.Ke2 Ke7+–) 48.Qc2 (48.Qb8) 48...Qe6+– 49.Qd3 (better is 49.Qd1 Kc7 50.Qh5 Qc4 51.Qe2 Qc6 52.Qe5 Kd7+–) 49...Ke7 (49...Kc8+–) 50.Qe2 Qe2 (50...Kd6 51.Qe6 Ke6 52.Ke2+–) 51.Ke2 Kf6 52.Ke3 Kf5 53.f3 Kg5 54.Ke4 Kf6 55.h3 Kg6 56.g4 hg4 57.hg4 Kf6 58.f4 Kg6 59.Ke5 Kf7 60.g5 Kg6 61.Ke6 Kg7 62.f5 Kf8 63.g6 Kg7 64.Ke7 Kg8 (64...Kh6 65.Kf6 Kh5 66.g7 Kg4 67.Ke5 Kf3 68.f6 Kg4 69.g8Q Kf3 70.Qg1 Ke2 71.f7 Kd2 72.Qd4 Kc2 73.Qe4 Kd2 74.f8Q Kc1 75.Qf2 Kd1 76.Qfc2) 65.f6+– Kh8 66.f7 (66.g7 Kg8 67.f7 Kg7 68.f8Q Kg6 69.Qf6 Kh5 70.Qf4 Kg6 71.Qg4 Kh6 72.Kf6 Kh7 73.Qg7) 66...Kg7 67.f8Q Kg6 68.Qf6 Kh7 (68...Kh5 69.Qf4 Kg6 70.Qg4 Kh6 71.Kf6 Kh7 72.Qg7) 69.Qg5 Kh8 70.Kf7 1–0. tanto – pwalsh, net–chess.com, 2001.

6.Ba1 Qc5 7.e3 Bd6? 8.d4+– ed4 9.Bd4 Qg5 10.Nf3 Qg6 (10...Qh6 11.g4 Ne7 12.g5+–) 11.Bd3 Qg2?? (11...Qh6 12.g4 Ne7+–) 12.Rg1 Qh2 (12...Qg1 13.Ng1 Nf6+–) 13.Nh2 Bh2 14.Rg7 f6 15.Qh5 Kd8 1–0. DEFFM – GuestPGDJ, freechess.org, 2020.

6.Ba1 d5 7.e3 Nf6 8.Nf3 g6?? 9.Be5+- Bg7 10.c4 (10.b6!? Nbd7 11.Bc7 Qc5+-) 10...0-0 11.cd5 Nbd7 (11...Nd5 12.Bg7 Kg7 13.d4+/-) 12.Bc7 Nd5 13.Ba5 (13.Bg3 N7f6+-) 13...b6+/- 14.Bc3 Nc3 15.Nc3 Nc5 (15...Bb7 16.Be2+/-) 16.Bc4 Be6 17.Qe2 (17.Be6 Qe6 18.0-0 Bc3 19.dc3 Qc4+-) 17...Rc8 18.0-0 Bf5 (18...Bc3 19.dc3 Ne4 20.Be6 Qe6 21.Ra1+/-) 19.Nd5 (better 19.d4 Nb7 20.Nd5+-) 19...Qe8? (19...Qd6 20.Ng5 Ne6 21.e4+-) 20.d3 (20.Nb6 Rd8+-) 20...Rb8 (20...Qd8 21.Nb4+-) 21.e4 Bg4 22.h3 Bd7 23.d4 (better 23.Qe3!?+-) 23...Ne4 24.Re1 f5?? (better 24...Nd6 25.Ne7 Kh8+-) 25.Nc7 (25.Nc7 Kf8 26.Ne8 Re8 27.Qa2+-) 1-0. Antares_Sco (1815) - Beltessazar (1920), Monthly SuperBlitz Arena, lichess.org, 2019.

6.Ba1 d5 7.Nf3 Nd7 8.e3 Ngf6 9.Be2 Qe6 10.0-0 Bd6 11.Nc3 (11.Ng5 Qf5 12.f4 Qg6+=) 11...0-0+= 12.d3 (12.Ng5 Qe7+=) 12...c5 (12...Re8 13.Qd2+=) 13.Qd2 h6 14.Rb1 b6 15.Bb2 Bb7 (15...Re8 16.Ra1+=) 16.Ra1 Ra8 17.Ra8 Ba8 18.Nd1 Bb7 19.c4 dc4 20.dc4 e4 21.Ne1 Ne5 22.Bc3 Bc7 23.Nb2 Neg4 (23...Qf5 24.Nd1=) 24.h3= Ne5 25.Qd1 Ne8 26.Qa1 Bb8 27.Qd1 Nd6 The pressure on c4 grows 28.Nc2 f5 (better is 28...Bc7 29.Qf1 Bd8+=) 29.Na4 (better is 29.Na3!?=) 29...Nec4–/+ (29...Ndc4?? 30.Qd8 Kf7 31.Qb8+–) 30.Bc4 (30.Qa1 Qf7–/+) 30...Qc4 31.Na3 Qa2 32.Qa1 Qa1–+ 33.Ba1 Bc7 34.Be5 Nb5 35.Nc4 Bd8 36.Kf1 Kf7 37.Ncb6 Bc6 38.Nc4 Na3 39.Na3 Ba4 40.Bb2 g6 41.Be5 Ba5 42.Nc4?? Bb5 (42...Bb5 43.Bd6 Bc4 44.Kg1 Bb4–+) 0–1. Achermann,Josef (1685) – Yakimov,Alexander (2180), Telechess, 2004.

6.Ba1 Nf6 7.e3 Qe6 8.Nf3 e4 9.Ng5 Qa2?? (better 9...Qf5 10.Bf6 gf6=) 10.Bf6+- gf6 11.Ne4 d5? (better 11...Qe6 12.Nbc3 d6+-) 12.Nbc3 Qa8 (12...Qb2 13.Nf6 Kd8 14.Nfd5+-) 13.Nd5 Be6 (13...Kd8+-) 14.Nc7 (14.Nc7 Kd8 15.Na8+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.e4 Qb4 6.Be5 Qe4 7.Qe2 Qe2 8.Be2 Nb4 +=.

5.Bb5 c6 6.Bc4 b5 7.Bb3 Bb7 8.Nf3 d6 9.h3 Nf6 10.d3 d5 11.Ne5 Nbd7 12.Nd7 Qd7 13.Bf6 gf6 14.Qf3 0-0-0 15.c4 dc4 16.dc4 bc4 17.Bc4 c5 18.Qf6 Qd1 0-1. alex296 – controlc, Rated Blitz game, lichess.org.

5.d3 e4 (5...Nc6!?-/+) 6.de4 Qe4 7.Bd3 (7.Nd2 Qb4 8.Rb1 Qa4=+ (8...Ra2? 9.Bg7 Qd2 10.Kd2 Bg7 11.Qg4+-)) 7...Qb4 (better 7...Qg2 8.Qf3 Qf3 9.Nf3 b4-+) 8.Bc3= Qd6 9.Bb5 Qd1 10.Kd1 Bd6?? (better 10...c6 11.Bd3 d5=) 11.Bg7+- (11.Bg7 Ra5 12.Nc3+- (12.Bh8?! Rb5 13.Nf3 Nc6+-)) 1-0. skij - tago87, Rated Blitz game, lichess.org, 2015.

4.Qc1 Qb5=+ 5.e3 Qc5 6.Ba3 Qb6 7.Bf8 Kf8 8.Nc3 Ne7 9.Nf3 Nbc6 10.Be2 d5 11.Qa3 Qb4 12.Qc1 (12.Qb4 Nb4 13.0-0 f6=+) 12...d4 13.Rb1 Qd6 14.Nb5 Qd7 15.0-0 a6 16.Na3 f6 17.Rd1 e4 (17...b5 18.Bd3-/+) 18.Ne1 (18.Nd4 Nd4 19.ed4 Nf5+/-) 18...Ng6 (18...Nd5 19.Qb2-/+) 19.ed4? (better 19.d3 ed3 20.Bd3=+) 19...Nd4-+ (19...Qd4?! 20.d3=+) 20.c3?? (better 20.Bf1 Nf4 21.Kh1-/+) 20...Ne2 21.Kf1 Nc1 22.Rbc1 Qe7 (22...Qd6 23.Nc4 Qh2 24.f3-+) 23.Nac2 Bg4 24.f3 ef3 25.Nf3 Bf3 26.gf3 Qe5 27.Ne3 Qh2 28.d4 Nf4 29.Rd2 Qh1 30.Kf2 Qc1 (30...Qc1 31.Rd1 Qb2 32.Rd2 Qd2 33.Kg3 Qe3 34.c4 Ne2 35.Kh3 Qf3 36.Kh2 Nf4 37.d5 Qg2) 0-1. reginaldox - renault18 (1635), Rated Blitz tournament sFv4rLrD, lichess.org, 2015.

4.Nc3 Qb2 5.Qb1 Qb1 6.Rb1 c6 7.e3 cb5 8.Nb5 Na6 9.Nd6 Ke7 10.Nc8 Rc8 11.c3 b6 12.Nf3 Nc5 13.Ne5 Ne4 14.Bd3 f6 15.Nc4 Nc5 16.0-0 Nd3 17.Rfe1 Ne1 18.Re1 Rc4 19.e4 Ke6 20.f3 Bc5 21.Kf1 d5 22.g4 de4 23.fe4 Ke5 24.Kg2 Re4 25.Re4 Ke4 26.h3 Kf4 27.d4 Ba3 28.c4 h5 29.d5 hg4 30.d6 gh3 31.Kh2 Bd6 32.a4 Ne7 33.c5 Bc5 34.a5 ba5 0-1. roroschach – ghjghuj, Rated Blitz game, lichess.org.

4.Be5= Nc6?? 5.bc6+– d6 (5...dc6 6.Bc7 Bd6 7.Bd6 Qd6 8.e3+–) 6.cb7 Bb7 7.Bc3 Qc5 8.d4 Qb6 (8...Qc6 9.e3+–) 9.f3 (9.d5 c6+–) 9...0-0-0 (9...d5 10.e3+–) 10.e4 c5 (10...d5 11.e5+–) 11.d5 Ne7 12.a4 f5 (12...Ba6 13.Bb5!+–) 13.Bd3 (better is 13.a5 Qc7 14.a6+–) 13...g6 (13...Qc7+–) 14.Bh8 Bh6 15.Bf6 fe4 16.fe4 Qc7 (16...Re8 17.Qg4 Kc7 18.Qe6+–) 17.Qg4 Kb8 18.Qh4 Bf8 19.Qh7 Nd5 20.Qc7 Nc7 21.Bd8 Bg7 22.Bc7 Kc7 23.c3 Bc3 24.Nc3 Kc6 25.Bb5 Kb6 26.Nf3 1–0. Baer,Cy (1895) – Jahn,Josie, remoteschach.de, 2007.

4.Be5 d6 5.Bc3 Qb5 6.e3 Qg5 7.Nf3 Qd5 8.Be2 Nc6 9.0-0 Nh6 10.h3 (10.Bb2 Qa5+=) 10...Ne5 11.Ne5 de5 12.f4 f6 (12...e4 13.Bb2=) 13.fe5+= fe5 14.Bf3 Qb5 (14...e4 15.Bh5 Kd8+=) 15.Be2 Qb6 (15...Qd5!?=) 16.Bc4 (16.Be5 Be6 17.Nc3+-) 16...Bd6? (better 16...Bf5+=) 17.Qh5+- Kd8 18.Be5 (18.Qg5 Be7 19.Qg7 Re8+-) 18...Be5 19.Qe5 Re8 (19...Qg6 20.Bd3 Re8 21.Qd4 (21.Bg6?! Re5 22.Bh7 b5+-) 21...Qd6 22.Qg7+- (22.Bh7?! Qd4 23.ed4 c6+-)) 20.Qg5 Re7 (20...Kd7 21.Qg7 Re7 22.Qf6+-) 21.Nc3 (21.Rf8 Kd7 22.Bb5 Ke6+-) 21...Qg6 (21...Qd6 22.Rf8 Kd7+-) 22.Rf8 Kd7 23.Qd5 Qd6 24.Raf1 (better 24.Bb5 c6 25.Rd8 Kd8 26.Qd6 Bd7 27.Rf1+-) 24...Qd5 25.Nd5 Re5 26.Nf4 (better 26.Rh8 c6 27.Nf6 gf6 28.Rh7 Kd8 29.Rh6+-) 26...Rf5? (26...c6 27.Rh8 b5 28.Bb3+- (28.Rh7?! bc4 29.Ng6 Rf5+/-)) 27.Rf5 (better 27.Be6 Kc6 28.Rc8 (worse 28.Bc8 Rf8 29.Be6 Kd6-/+) 28...Rc8 29.Bc8+-) 27...Nf5 28.Nd3 (28.e4 Nd6 29.Be6 Kd8+-) 28...Nd6 29.Bb3 (better 29.Bg8+-) 29...b6? (better 29...Ke7+/-) 30.Ne5+- Ke8 31.Bf7 Ke7 32.Nc6 Kd7 33.Nd4 (better 33.Bd5 Ke8 34.Ne5+-) 33...Bb7+/- 34.Be6 Ke7 35.a4?? (35.Bb3 c5 36.Nf5 Nf5 37.Rf5 Rf8 38.Rf8 Kf8+/-) 35...Rf8?? (better 35...c5 36.Re1 Kf6-/+) 36.Rf8+/- Kf8 37.c3 (37.d3 Ke7 38.Ba2 c5+/-) 37...Ke7 38.Kf2?? (better 38.Bg8+/-) 38...Ne4 39.Ke2 Ba6?? (39...c5 40.Bb3 cd4 41.ed4-+) 40.d3?? (better 40.Ke1!?+=) 40...Nc3 (better 40...c5!? 41.Bb3 cd4 42.cd4 b5-/+) 41.Kd2= Na4 42.Nc6?? (better 42.Bg8!?=+) 42...Kd6 (42...Ke6 43.Na7 Nb2 44.Nc6-+) 43.Na7?? (better 43.Bf7 Bd3 44.Na7-+) 43...Ke6-+ 44.Nc6 Kd6 45.Nb4 Nc5 46.Na6 Na6 47.g4 (47.Kc3 c5-+) 47...b5 48.Kc3 b4 49.Kb3 (49.Kc4 Ke5-+) 49...Kc5 (49...Nc5!? 50.Kb4 Nd3 51.Kc3-+) 50.h4 Kb5 51.g5 (51.Kc2 Nc5 52.d4 Ne4-+) 51...c5 52.h5 Nc7 53.h6 (53.Ka2-+) 53...Nd5 (53...g6!? 54.Kb2-+) 54.e4?? (better 54.g6 Nf6 55.e4 hg6 56.e5+-) 54...gh6-+ 55.ed5 (55.gh6 Nf4 56.e5-+) 55...h5 56.d6 h4 (better 56...Kc6 57.d4 Kd6-+) 57.d7+- h3 58.d8Q h2 59.Qd5 (59.Qd5 Kb6 60.d4 cd4 61.Qd4 Kc6 62.Qe4 Kd6 63.Qh7+-) 1-0. kus4art – jjwhitney, Rated Blitz game, lichess.org, 2015.

5.Bc3 Nf6 6.e3 Qf5 7.Nf3 Nc6 8.Bd3 Qe6 9.0-0 Bd6 10.Be2 b6 11.d4 Ne7 12.Nbd2 Ned5 13.Bb2 Bb7 (13...Bb4 14.c4 Nc3 15.Bc3 Bc3 16.Rc1+=) 14.c4+/- Ne7 15.Re1 Qg4 16.g3 (better 16.Qc2 Ng6 17.h3+/-) 16...Nf5?? (16...0-0!?+=) 17.d5 (better 17.Nh4 Qh3 18.Bf1+-) 17...Nh5?? (better 17...Ne7+/-) 18.Ne5 (better 18.Nh4 Qg5 19.Ne4 Nhg3 20.Ng5 Ne2 21.Qe2 Nh4 22.Qh5+-) 18...Qh3 (18...Qg5 19.Bh5 Be5 20.Be5+-) 19.Bh5 (better 19.Bg4 Qg4 20.Qg4 g6 21.Ng6 hg6 22.Bh8 Bb4+-) 19...g6 20.Bg4 Qh6 21.Nf7! Kf7 22.Bh8 Rh8 23.Qf3 (23.Qa4 Bc8 24.Nf3 Qg7+-) 23...c6?! (23...Rf8 24.Bf5 Kg8 25.Qe4 gf5 26.Qd3+-) 24.e4 (better 24.Bf5 gf5 25.Qf5 Ke7 26.Ne4+-) 24...cd5 (24...Qd2 25.Red1 Qb4 26.ef5+-) 25.cd5 (25.ef5 Rf8 26.fg6 Kg6 27.Qd3 Kg7 28.cd5 Qg6 29.Qd4 Qf6 30.Qf6 Rf6+-) 25...Rf8 (25...Qd2 26.Rad1 Qa2 27.ef5+-) 26.ef5 (26.Nc4 Bb4 27.Reb1 Qg7 28.ef5 Kg8+-) 26...gf5 (26...Qd2 27.Rad1 Qa2+-) 27.Qf5 Kg8 28.Qd3 (better 28.Qd7 Bd5 29.Rad1 Qf6+-) 28...Rf2 (28...Bb4 29.Rad1 Qg7 30.Qc4+-) 29.Kf2 Qh2 30.Kf3 (better 30.Ke3 Bg3 31.Rf1 Be5+-) 30...Qg3 31.Ke4 (better 31.Ke2 Qg2 32.Kd1 Qg4 33.Kc2+-) 31...Qg4 (31...Qf4) 32.Ke3-+ Bc5 (32...Bc5 33.Qd4 Bd4 34.Kd3 Ba1 35.Re8 Kg7 36.Re7 Kg6-+) 0-1. brucepeng (1945) - eminich (1905), lichess.org, 2020.

5.Bc3 Nf6 6.e4 Qc6= 7.d3 d6 (7...d5 8.e5 Nfd7 9.d4=) 8.Nf3 Be7 9.Be2 0-0 10.0-0 Na6 11.Nd4 Qe8 12.Nd2 c5 13.N4f3 Bg4 (13...b5 14.Rb1=) 14.Rb1 b6 15.h3 Bh5 16.g4 (16.a3 Qa4+=) 16...Bg6= 17.d4 (17.Re1 Qa4=) 17...Nc7=+ 18.e5 (18.dc5 dc5 19.Bd3 Rd8=+) 18...de5 (18...Nfd5 19.Bb2 Nf4 20.Nb3-+) 19.de5? (better 19.Ne5 Nfd5 20.Ba1=+) 19...Nfd5-+ 20.Ba1 Nb4 (20...Nf4-+) 21.Rb4? (better 21.Ne1!?-/+) 21...cb4-+ 22.Bd3 Bc5 23.Ne4 Rd8 24.Qe2 Nd5 25.Nh4 Nf4 26.Qf3 Nd3 27.cd3 Qd7 28.Nf5 (28.Rd1 Be4 29.Qe4 Qe6-+) 28...Bf5 (better 28...Qd3 29.Qd3 Rd3-+) 29.gf5 Qd3 30.Qg4 Bd4 31.Nf6? (better 31.Rd1 Ba1 32.Rd3 Rd3 33.Nf6 Kh8 A) 34.Qb4 Rc8 35.Qe7 gf6 (35...Rh3?? 36.Ne8 Kg8 37.e6 Rc1 38.Kg2 fe6 39.fe6+-) 36.Qf6 Kg8-+; B) 34.Nh7 Kh7 35.f6 gf6 36.Qf5 Kg8 37.Qd3 fe5 38.Qg3 Kh7 39.Qh4 Kg6 40.Qe7=) 31...Kh8-+ 32.Qh5 (32.Nh5 Rg8 33.Nf4-+) 32...gf6 33.ef6 (33.Qh6 Rg8 34.Kh2 Ba1 35.Qf6 Rg7 36.Rg1-+) 33...Rg8 34.Kh2 (34.Qg4 Rg4 35.hg4 Qg3 36.Kh1 Bf2 37.Be5 Qh3 38.Bh2 Qf3) 34...Bf2 (34...Qf1 35.Qg4 Qf2 36.Kh1 Rg4 37.hg4 Qg1) 35.Qf7 (35.Qf3 Qf3 36.Rf2 Qf2 37.Kh1 Rg1) 35…Qg3 (35...Qg3 36.Kh1 Qh3) 0-1. valeriy1947 (1835) - mahshid (1905), Rated Classical game, lichess.org, 2014.

5.Bc3 Nf6 6.Bf6 gf6 7.e3 Qa5+=.

5.Nf3 Nf6 6.Bf6 gf6 7.Nc3 Qf5 (7...Qa5 8.e4+=) 8.e4+/- Qg6 (8...Qe6 9.Bd3 Nc6 10.Nd5+/-) 9.Nd5 (9.Nh4 Qg5 10.Nf5 c6+-) 9...Bd6? (better 9...Qe4 10.Ne3 Nc6+/-) 10.Bd3+- c6? (10...Qg7 11.0-0 Rg8 12.g3+-) 11.Ne3 (better 11.e5 Qg7 12.Nf6 Kd8 13.Nh5+-) 11...Be5 12.Ne5 fe5 13.0-0 Rg8 14.f4 d6 15.Qf3 (15.fe5 de5 16.Qb1 b6+-) 15...Bg4 (15...Nd7 16.Nc4+/-) 16.Qg3 (better 16.Ng4!? Qg4 17.fe5 Qf3 18.Rf3 de5 19.Raf1+-) 16...Nd7+/- 17.h3 (17.Nc4 0-0-0+=) 17...Be6+= 18.Qg6 (18.Qh4 ef4 19.Rf4 Qg5+=) 18...fg6 (18...hg6 19.c3=) 19.Kh2 (19.f5 Bf7+=) 19...0-0-0 (19...ef4 20.Rf4 Ke7 21.Bc4=) 20.f5+= gf5 21.Nf5 (21.ef5!? Bf7 22.f6+=) 21...Bf5 (21...Kc7 22.g4=+) 22.Rf5 Rdf8 23.Raf1 Rf5 24.ef5 (24.Rf5 Rg7=) 24...Nf6 25.g4 e4 (25...Kd7 26.Rb1 b6 27.Rg1=) 26.Be2 d5 (26...Kd7 27.Kg3+=) 27.Kg3+= Kd7 (27...h6 28.h4+=) 28.Kf4 Re8? (better 28...Kd6+=) 29.g5+- Nh5?? (29...e3 30.d3 Ng8+-) 30.Bh5 (30.Bh5 Rf8 31.f6+-) 1-0. Lance5500 (2650) - johannn (2010), lichess.org, 2019.

4.a4 Bb7 5.e3 g6 6.Nf3 Bg7 7.d3 (7.Be2 f5+=) 7...d6 8.e4 Nf6 9.Nbd2 Nbd7 10.Be2 0-0 11.c4 Rac8 (11...a6 12.0-0=) 12.0-0+= c6 13.Re1 d5? (13...Rfe8 14.Bc1=) 14.cd5?? (better 14.bc6 Rc6 15.ed5+-) 14...cd5= 15.ed5 Nd5 16.Bf1 Can e5 get defended? 16...Rfe8 (16...Rfd8 17.Nc4=) 17.Nc4 e5 draws heavy fire 17...f6 18.Qb3 (better 18.Ba3 Qe6 19.Nd4 ed4 20.Re6 Re6 21.Nd6+/-) 18...Nf4?? (better 18...Nc5 19.Qa3 Qc7=) 19.Nd6 (19.Nd6 Bd5 20.Nc8 Rc8 21.Qd1+/-) 1-0. brucepeng (1970) - ANASBADRMyesser (1820), lichess.org, 2020.

4.c4 Bb7 5.Nf3 d6 6.e3 Nd7 7.d4 ed4 8.Nd4 d5 9.cd5 Bd5 10.Nc6 Bc6 11.bc6 Nb8 12.Ba3 Qe6 13.Bf8 Kf8 14.Qd8 Qe8 15.Qe8 Ke8 16.Be2 Nc6 17.Bf3 Nge7 18.Nd2 Rd8 19.Rc1 Rd6 20.Ne4 Rg6 21.0-0 f5 22.Ng3 Ne5 23.Rc7 Nf3 24.gf3 Kf7 25.Ra7 h5 26.Kh1 Kf6 27.Rg1 h4 28.Ne2 Rg1 29.Kg1 Rb8 30.Nd4 b5 31.f4 b4 32.Ra6 Kf7 33.Kg2 h3 34.Kh3 Rh8 35.Kg3 Rb8 36.Rb6 Rb6 37.f3 b3 0-1. glorij1 – NimzoBros, Rated Blitz tournament, lichess.org, 2014.

4.e3 a6 5.Nf3 e4 6.Nd4=.

4.e3 d5 5.Nf3 Bd7 6.Ne5 Nf6 7.Be2 Qd6 8.Nf3 Be7 9.0-0 0-0 10.c4 dc4 11.Bc4 Qc5 12.Be2 Bb5 13.Nc3 Be2 14.Qe2 Nc6 15.Rac1 Qa5 16.Nb5 Qa2 17.Bf6 Bf6 18.Rc6 Qd5 19.Nbd4 Bd4 20.Nd4 Rac8 21.Rfc1 Qd7 22.Qc4 h6 23.Rc7 Rc7 24.Qc7 Qa4 25.Qc4 Qa3 26.h3 a5 27.Rb1 Rb8 28.Nc6 Rb7 29.Qd4 b5 30.Qe4 Rb6 31.Ne7 Kf8 32.Nd5 Rb8 33.Nc3 b4 34.Nd5 b3 35.Qc4 a4 36.Nc3 Rb4 37.Qc5 Time forfeit 1-0. kus4art (1735) - Edvard (1680), Rated Blitz game, lichess.org, 2015.

4.e3 Qd6 5.a4 (5.Qf3 c6+=) 5...Qf6 (5...a6 6.Qf3 Ra7 7.Qg3+=) 6.Nf3 (better is 6.f4+/–) 6...e4?? (better is 6...d6+=) 7.Bf6+– gf6 (7...gf6 8.Nd4 Ne7+–) 0–1. GuestNPTV – GuestTXWC, freechess.org, 2017.

4.e4 Bb7 5.Nf3 (5.Nc3 Nf6=) 5...Be4+= 6.Ne5 Qe5?? (better is 6...d6 7.Qe2 Bb7=) 7.Be5+– f6 (7...Kd8 8.Qg4 Bg6 9.Qf3+–) 8.Bc7 g5 (8...Ne7 9.Qh5 Bg6 10.Qf3+–) 9.Qe2 Bg7 10.c3 (better is 10.Qe4 Ne7 11.Qa8+–) 10...d5 11.d3 f5 12.Qh5 Kd7 13.Qg5 (better is 13.Qf7 Ne7 14.Qg7 Rg8 15.Qh7 Kc7 16.Qe7 Nd7 17.de4 Rae8+–) 13...Bh6 14.Qd8 Ke6 15.Qd6 (better is 15.de4 Nf6 16.Qh8 Kf7+–) 15...Kf7 16.de4 Ne7 17.Qh6 Nd7 18.ef5 Nf5 19.Qh5 (19.Qf4 Kg6 20.h4 Rae8 21.Kd1 Nf6 22.Qg5 Kf7 23.Qf5 Re6+–) 19...Ke6 20.Bd3 Rhf8 21.0-0 Nc5 22.Re1 Kf6 (22...Ne4 23.Be4 de4 24.Re4 Kd7 25.Qh7 Rf7 26.Qf7 Ne7 27.Re7 Kc8 28.Qe6 Kb7 29.Be5) 23.Qf5 Kg7 24.Qh7 1–0. gtate (1930) – mwoodhead, net–chess.com, 2004.

4.Ba3 d6 5.bc6 Nc6 6.e3 Qc7 7.Bb5 Nf6 8.Nf3 h6 9.0-0 Bg4 10.h3 Bh5 11.g4 Bg6 12.d4 e4 13.g5 ef3 14.gf6 d5 15.fg7 Bg7 16.Qf3 Be4 17.Qg4 Rg8 18.Qg3 0-0-0 19.Bd6 Be5 20.Bc7 Rg3 21.fg3 Bc7 22.Bc6 bc6 23.g4 Bc2 24.Nc3 Ba5 25.Nd1 Bg6 26.Rc1 Kd7 27.Rf6 Rc8 28.h4 h5 29.Nf2 Bd2 30.Rc5 Be3 31.gh5 Bh5 32.Kg2 Bd4 33.Rh6 Bc5 34.Rh5 Rg8 35.Kf3 Bf2 36.Kf2 Rg4 37.Kf3 Ra4 38.Rh7 Ke7 39.h5 Ra2 40.Kf4 Rh2 41.Kg5 a5 42.Rh8 a4 43.Ra8 f6 44.Kg6 Rg2 45.Kh6 Rg4 46.Ra7 Ke6 47.Ra6 Kd6 48.Kh7 Kc5 49.h6 d4 50.Ra4 Kb5 51.Ra7 d3 52.Rf7 d2 53.Rf6 d1Q 54.Rf5 Kb6 55.Rf7 Qd3 56.Kh8 Qd4 57.Kh7 Re4 58.Rg7 Re8 59.Rf7 Qe4 60.Kg7 Re7 61.h7 Rf7 62.Kf7 Qh7 63.Ke6 Qd3 64.Ke7 c5 65.Kf7 c4 66.Kf6 c3 67.Kg5 c2 68.Kf6 c1Q 69.Ke7 ½-½. mustroll (1660) - rjcdagas (1725), Rated Blitz game, lichess.org, 2014.

4.a4 d6 5.e3 h6 6.c4 Nf6 7.d4 Qc7 8.de5 (8.Nd2 Bf5=) 8...de5 9.Ne2 (9.Nf3 Nbd7=) 9...Be7 10.Ng3 Bg4 11.Be2 Be2 12.Qe2 Nbd7 13.0-0 0-0-0 (13...0-0 14.Nf5 Bb4 15.Bc3 Bc3 16.Nc3=) 14.Nd2 Kb8 15.Nde4 Ne4 16.Ne4 f5 17.Ng3 Rhf8 18.Rfd1 Ka8 (18...g6 19.bc6 Qc6 20.a5=) 19.Nf1 (19.a5 Bh4+/-) 19...g5 20.g3 (20.a5!?+=) 20...e4 21.Nd2 (21.a5 cb5 22.cb5 Ne5=) 21...Ne5 22.Nb3 (22.Be5 Qe5 23.bc6 bc6=) 22...Bf6 (22...Nd3 23.Nd4 Qd7 24.bc6 bc6 25.Bc3=+) 23.Qc2 (23.Be5 Be5 24.Nd4 Bd4 25.ed4 c5=) 23...Nd3=+ 24.Ba3 (24.Bf6 Rf6 25.Qc3 Rfd6=+) 24...c5-/+ 25.a5? (better 25.Rab1-/+) 25...Ba1-+ 26.Ra1 f4 27.gf4? (27.b6 Qc8 28.ef4 gf4 29.a6 ab6 30.ab7 Kb7 31.Qe2-+) 27...gf4 28.ef4 (28.a6 fe3 29.fe3 Qg7 30.Kh1 Rf2 31.ab7 Kb8 32.Rg1 Qg1 33.Kg1 Rg8 34.Kh1 Rf1) 28...Qf4 (28...Rg8 29.Kf1 Qg7 30.Ke2 Nf4 31.Ke3 Ng2 32.Ke2 Qg4 33.Kf1 Nf4 34.Nc5 Qg1) 29.Kf1 Qh2 30.Ke2 (30.Bc5 Qh1 31.Ke2 Nf4 32.Ke3 Qf3) 30...Qh5 (30...Qf2 31.Kd1 Qe1) 31.Kf1 Qf3 (31...Qh3 32.Ke2 Rf2 33.Kd1 Qf1) 32.Qe2 (32.Kg1 Qg4 33.Kf1 Qh3 34.Ke2 Rf2 35.Kd1 Qf1) 32…Qh1 0-1. frate_ali (1760) - davidpiojoso87 (1745), Rated Bullet game, lichess.org, 2015.

4.a4 d6 5.Nf3 Bf5 6.c4 Nd7 7.e3 Ngf6 8.Be2 h6 (8...d5 9.cd5 cd5 10.0-0=) 9.bc6 (9.0-0 Qe6+=) 9...bc6= 10.Nc3 g5 11.0-0 Rg8 12.d3 h5 13.e4 Bh7 14.d4 (14.Bc1 g4 15.Ng5 Bg6+=) 14...Bg6 (better 14...g4 15.Ne1 ed4 16.Qd4 Ne4 17.Ne4 Be4-/+) 15.Ng5 Ng4 (15...ed4 16.Qd4 Bg7 17.Qd2+=) 16.Bg4 (16.Nf3 Ndf6+/-) 16...Qg5 (better 16...hg4!? 17.Qg4 ed4=+) 17.Bd7+/- Kd7 18.de5 (18.g3 ed4 19.Qd4+=) 18...Be4 (18...Qg2! 19.Kg2 Be4 20.Kh3 Bg2 21.Kh4 Be7 22.Kh5 Rg5 23.Kh4 Rh8 24.Qh5 Rhh5) 19.Ne4?? (better 19.g3 Bg6 20.Re1+/-) 19…Qg2 0-1. brucepeng (1930) - Jguana (1910), lichess.org, 2020.

4.c4 Nf6 5.Nf3 d6 6.e3 Bd7 7.a4 Qe6 8.Ng5 Qe7 9.d4 ed4 10.Bd4 h6 11.Nf3 g6 12.Bd3 Bg7 13.Qc2 0-0 14.Nh4 c5 15.Bc3 Be6 16.Bg6 fg6 17.Ng6 Qe8 18.Nf8 Qf8 19.0-0 Nbd7 20.h3 Ne5 21.Nd2 Nc4 22.Nf3 Nb6 23.Nh4 Bf7 24.Nf5 Nbd5 25.Bb2 Bg6 26.Rfd1 Bf5 27.Qf5 Ne7 28.Qe6 Qf7 29.Qd6 Ne4 30.Qf4 Qf4 31.ef4 Bb2 32.Rab1 Bd4 33.Rdc1 Nf2 34.Kf1 Ne4 35.Re1 Ng3 Normal 0-1. anem0s – arabicleader, Rated Blitz game, lichess.org, 2015.

4.bc6 dc6 5.d4 (5.Ba3 c5=) 5...Nd7 (5...ed4 6.Bd4 c5 7.Bb2+=) 6.e3= Ngf6 7.Nd2 Qb4 8.Rb1 ed4 9.Bd4 Qa4 10.Bc4 b5 11.Bb3 Qa5 12.Ngf3 Nd5 (12...Bd6!?=) 13.Ng5+/– f6? (13...Bb4 14.e4 Bc3 15.ed5 Bd4 16.Qe2 Ne5+–) 14.Bd5+– fg5?? (better is 14...cd5 15.Qh5 g6+–) 15.Bc6 Rb8 16.Qh5 g6 (16...Kd8 17.Qg5 Be7 18.Qg7 Rf8+–) 17.Qg5 Be7 (17...Qc7 18.Qf6 Qd6 19.Qd6 Bd6 20.Bh8+–) 18.Qe5 Rf8 19.Qb8 Kd8 20.Bd7 (20.Qb5 Qb5 21.Bb5 a6+–) 20...Kd7 21.Qb5 Qb5 22.Rb5 Ba6 (22...a6 23.Rb6+–) 23.Ra5 Bc8 24.Ra7 Ke6 25.0-0 Bh4 (25...Rd8 26.Rb1 Rd7 27.Rb6 Kf7 28.Rd7 Bd7 29.Nc4+–) 26.Rb1 Kf5 27.Rb5 Ke6 Black threatens to counter with Bd7 28.Re5 Kd6 29.Ne4 (29.Nc4 Kc6 30.Rc5) 29...Kc6 30.Rc5 Kb6 White now must not overlook the idea Rd8 31.Rcc7 (31.Rc4 Kb5 32.Nd6) 31...Kb5 32.Nd6 Kb4 33.Bc3 1–0. Rosner,Dirk – Heinrichs, email, 1999.

4.bc6 Nc6 5.c4 Nd4 6.Nc3 Qb4 7.Rb1 Qa5 8.e3 Nc6 9.Nf3 f6 10.Bd3 Nb4 11.Qe2 Bc5 12.0-0 d6 13.Ne1 Ne7 14.Qh5 g6 15.Qh6 Nd3 16.Nd3 Bf5 17.e4 Be6 18.Qg7 Rg8 19.Qh7 Qd8 20.Nd5 Nd5 21.cd5 Bd7 22.Qg8 Ke7 23.Qg7 Ke8 24.Qg6 Ke7 25.Qg7 Ke8 26.Nc5 dc5 27.f4 Qe7 28.Qg8 Qf8 29.Qf8 Kf8 30.fe5 f5 31.ef5 Bb5 32.Rf2 Rd8 33.d6 Bc6 34.Rc1 b6 35.d4 Bd5 36.dc5 bc5 37.Rc5 Ba2 38.Ba3 Rd7 39.Ra2 Kg7 40.e6 Rb7 41.Rc7 Rc7 42.dc7 Kf6 43.c8Q Ke5 44.Qd7 Kf5 45.Re2 Kf6 46.e7 Kg5 47.e8Q Kf4 48.Qdf7 Kg5 49.Qeg8 Kh6 50.Qfh7 1-0. alanme1 (1985) – Amplon, Rated Blitz tournament, lichess.org.

4.a3 Nf6=+ 5.a4 (5.Nf3 Nbd7=+) 5...g6 (5...Nbd7 6.Nf3=+) 6.e3 Bg7 7.c4 0-0 (7...d4 8.Be2 c5 9.d3=+) 8.Nf3 (8.Ba3 Qd8 9.Bf8 Bf8 10.cd5 Nd5+/-) 8...e4 (8...Nbd7 9.Ba3 Nc5 10.cd5=) 9.Nd4 (better 9.Ba3!? Qd7 10.Bf8 Bf8 11.Nd4+/-) 9...Bg4 (9...Rd8 10.Nc3=+) 10.Be2 (10.Qc2 Re8=+) 10...Be2=+ 11.Qe2 Nh5 (better 11...Qb4!? 12.Ba3 Qa4=) 12.cd5+= Qb4? (better 12...Rd8+=) 13.Ba3+- Qa5 14.Bf8 Bf8 (14...Kf8 15.Qc4+-) 15.Nc3 Bg7 16.0-0 (16.Qc4 Nf6+-) 16...Nd7 17.Ne4 Re8 (17...Bd4 18.ed4 Re8+-) 18.Ng5 (better 18.Qd3+-) 18...Bd4+/- 19.Qc4?? (better 19.Qg4 Ba1 20.Qd7+-) 19...Ba1-/+ 20.d6 (20.Ra1!? Ne5 21.Qc2-/+) 20...Ne5-+ 21.d7 (21.Qa2 Qb4 22.Ra1 cd6-+) 21...Rd8 (21...Nc4 22.de8Q Kg7 23.Qf7 Kh6 24.f4 Bg7 25.Qg8 Nf4 26.Nf7 Kh5 27.Qh7 Bh6 28.Qh6 Kg4 29.Rf4) 22.Qd5? (22.Qa2 Rd7 23.Qa1-+) 22...Rd7 (22...Qa4?! 23.d4 Bd4 24.ed4 Rd7 25.Qe5 Qd4 26.Qe8 Kg7 27.Qf7 Rf7 28.Ne6 Kf6 29.Nd4-+) 23.Qa2 Qd2 (23...Bd4!? 24.ed4 Rd4 25.Qa3 Qd2 26.Nh3-+) 24.Qa1 h6 (better 24...Rd5!? 25.Qa3-+) 25.Qe5 hg5 26.Qg5 Qb4 27.Qe5 Re7 (27...Ng7!? 28.Qa1-+) 28.Qd5 Nf6 29.Qb7 Qa4 30.h3 Ne4 31.Qb8 (31.Qc6 Re5 32.Qc7 Rb5-+) 31...Kg7 32.Qd8 Qb4 33.Qd5 (33.Qd3 Re5 34.Rb1 Qc5-+) 33...Nf6 (33...Nc3!? 34.Qd2 Re4 35.Ra1-+) 34.Qb7 (better 34.Qc6-+) 34...a5?? (34...Qc5 35.Ra1-+) 35.Ra1? (better 35.ba6 Qa5 36.a7=+) 35...c5?? (better 35...Ne4 36.Qa7 Nf2 37.Qd4 Qd4 38.ed4 Ne4 39.Ra5 Nc3-+) 36.Qe7+- Qb5 37.Qe5 a4 (37...Qb6 38.Rc1+-) 38.Rc1 (38.g4 Qe8 39.Qc3 g5 40.Qc5 Kh6+-) 38...a3 (38...Qd3 39.Qc5 Nd5 40.Qc2 Qc2 41.Rc2+-) 39.Qc5 Qc5 40.Rc5 Ne4 41.Ra5 1-0. KLINGON09 (1825) - Chimamiso (1860), lichess.org, 2019.

4.Ba3 Qd8 5.Bf8 Kf8 6.Nf3 Qe8 7.d3 (7.e3 Nf6=) 7...Nf6 (7...Qb5 8.e3-/+) 8.g3 (8.c4 Bg4=) 8...g6 (8...Qb5 9.Bg2-/+) 9.Bg2 (9.c4 dc4 10.dc4 Kg7=) 9...Kg7 (9...Qb5 10.Nbd2 d4 11.Nc4=+) 10.Nbd2 (10.c4 dc4 11.dc4 e4=+) 10...Qb5 11.Rb1 (11.Ne5 Re8 12.c4 Qb2=+) 11...Qc6 (11...Qe8!?-/+) 12.Ne5= Qe6 (12...Qc3 13.Nef3=) 13.d4 c6 (13...c5 14.Nb3 Na6 15.Nd3=+) 14.e3 Nbd7 15.0-0 (better 15.Nd7!? Nd7 16.0-0=) 15...Ne5-/+ 16.de5 Qe5 17.c4 Bg4 (17...Rd8 18.Qa4-/+) 18.Qc2 Bf5 19.Qc1? (better 19.Qb2 Qb2 20.Rb2=+) 19...Bb1-+ 20.cd5 (20.Nb1 Rhe8 21.Nd2-+) 20...Be4 (better 20...Ba2!? 21.dc6 bc6 22.Qc6-+) 21.Ne4 Ne4 22.dc6 Rhc8 (better 22...bc6 23.Qc2 Rhe8 24.Qc6-+) 23.Qc2?? (better 23.cb7!? Rc1 24.ba8Q Rf1 25.Bf1+/-) 23...Nf6?? (23...Nd6 24.cb7 Nb7-+ (24...Rc2?! 25.ba8Q Ra2 26.Qc6=)) 24.Qb3?? (better 24.cb7 Rc2 25.ba8Q Ra2 26.Qc8=) 24...Qe6 (better 24...bc6 25.Qa4 Nd5-+) 25.cb7+/- Qb3 26.ab3 Rab8 27.bc8Q Rc8 28.Rb1 Nd7 (28...a5 29.Ra1+/-) 29.b4 Rb8 30.b5 a6 31.Bc6 (better 31.Bh3 f5 32.Rd1+/-) 31...Nb6?? (better 31...Ne5 32.Bd5 Rb5 33.Rb5 ab5=) 32.ba6+- Rc8 (32...Rd8 33.Rb6 Rd1 34.Kg2+-) 33.Rb6 (33.Rb6 Rc7 34.Kg2+-) 1-0. Chaman (1615) – gennadybeautiful, Rated Blitz game, lichess.org, 2014.

4.Ba3 Qe6 5.Bf8 Kf8 6.e3 Bd7 7.Nf3 Nf6 8.Ng5 (8.d4 e4 9.Ne5 a6 10.ba6 Na6+=) 8...Qf5 9.h4 h6 10.Nf3 (10.Nh3 a6=+) 10...c6 (10...Ng4 11.Qe2 Qc2 12.Nc3-/+) 11.a4 (11.Nc3 Ng4 12.d3 Kg8=) 11...c5 (11...Ng4!? 12.Qe2 Qc2-/+) 12.d3 b6 (12...a6 13.Ra3=+) 13.Be2 Be6 (13...a6 14.Nbd2=+) 14.Nbd2 (14.a5 ba5 15.Ra5 Nbd7=) 14...Nbd7 15.e4 (15.a5 Rd8=) 15...de4=+ 16.de4 Ne4 17.Ne4 Rd8?? (better 17...Qe4 18.0-0 g6-/+) 18.Ng3 Qf6 (18...Qf4 19.Qd6 Kg8 20.Qe7+-) 19.Qd6 Qe7 20.Qe7 (20.Qc7!? e4 21.Ne4 Bf5+-) 20...Ke7 21.Rd1 f6 22.0-0 Nb8 23.Rd8 (23.h5 Rd7+-) 23...Rd8 24.Rd1 Rd1 25.Bd1 Nd7 26.Be2 Nf8 (26...g6 27.h5 g5 28.Nd2+-) 27.c4 (27.h5 g5+-) 27...Ng6 28.Ne4 (28.h5 Nf4 29.Nd2 f5+-) 28...Nf4 29.Bf1 f5 30.Ned2 e4 31.g3 Ng6 32.Nh2 (32.h5 Nf8 33.Ne5 Kd6+-) 32...Kf6 33.Kg2 Ne5 34.f3?? (better 34.h5+-) 34...e3= 35.Nb3 Bc4 (35...Nc4 36.Na1 Na3 37.Be2=+) 36.Bc4 Nc4 37.Kf1 Nb2 (37...Ke5=) 38.Ke2 (38.a5 g5 39.ab6 ab6 40.hg5 hg5 41.Nc5+/-) 38...Na4=+ 39.Ke3 Nc3 40.g4 fg4 41.Ng4 Ke6 42.Nf2 Nb5 43.Ne4 Nd6 44.Nd6 Kd6 45.Kd3 Kc6 46.Kc4 (46.Ke4 b5-/+) 46...b5 47.Kc3 a6 48.Kb2 Kb6 49.f4 a5 50.f5 a4 51.Nd2 b4 52.Ne4 Kb5 53.Nd6 Kc6 54.Ne8 c4 Black plans b3 (54...a3 55.Ka2 Kd5 56.Ng7-+) 55.Ng7= c3 56.Kb1? (better 56.Kc2=+) 56...b3-+ 57.Ne6 a3?? (57...Kd5 58.Nf4 Kc4-+) 58.Nd4= Kc5 59.Nb3 Kd5 60.Kc2 Ke5 61.f6 Kf5?? (better 61...Kf6 62.Kc3 Kf5=) 62.Kc3 (62.Kc3 Kf6 63.Nd4=). kasperoff (1890) - saninot (1875), Hourly SuperBlitz Arena, lichess.org, 2021.

4.a4 c5 5.d3 d4 6.Nf3 a5 (6...Nf6 7.e3+=) 7.Nbd2= f6 8.Nc4 Nd7 9.Qd2 Qd8 10.0-0-0 (10.e3!?=) 10...g6 11.Kb1 Nb6 12.Nb6 Qb6 13.e3 Be6 14.g3 Bh6 15.Qe1 Ne7 16.ed4 cd4 (16...ed4 17.Bg2+=) 17.Ne5= fe5 18.Qe5 0-0-0 (better is 18...Rf8!? 19.Re1 A) 19...Rf2?? 20.Bd4 (20.Qe6?! Qc5 21.Re2 Re2 22.Be2 Rc8+/–) 20...Rf5 21.Bb6 (21.Qe6?! Qe6 22.Re6 Rd8+–) 21...Re5 22.Re5+–; B) 19...Kd7+=) 19.Re1+– Bd7?? (better is 19...Kd7 20.Bd4 Qd6 21.Qd6 Kd6 22.Be5 Kd7 23.Bh8 Rh8+–) 20.Bd4 (20.Qe7? Rhe8 21.Bg2 Re7 22.Re7 Bd2–+). Grund,Karl – Slovak,Jan, (year?).

4.a4 c6 5.Nf3 Bd7 6.Be5 f5 7.e3 Nf6 8.Be2 Ng4 9.Bb2 h5 10.h3 Nf6 11.0-0 Ne4 12.d3 Nd6 13.Nbd2 cb5 14.ab5 Bb5 15.Nd4 Bd7 16.Bf3 Nc6 17.Nc6 Bc6 18.Re1 0-0-0 19.Nb3 Rg8 20.Ra7 Kb8 21.Ra1 g5 22.Qd2 g4 23.hg4 hg4 24.Be2 Qh4 25.Qa5 g3 26.Qa7 Kc7 27.Nc5 Qh2 28.Kf1 Qh1 0-1. bruteforce101 (1895) - mrqrush (1795), Rated Bullet game, lichess.org.

4.a4 Bd7 5.e3 Nf6 6.Nf3 e4 7.Nd4 c5 8.bc6 bc6 9.c4 Qd6 10.Nc3 Be7 11.Ba3 c5 12.Ndb5 Bb5 13.Nb5 (13.ab5 d4 14.ed4 Qd4+=) 13...Qc6 (13...Qd7!?=) 14.cd5+= Qd5?? (better is 14...Nd5 15.Na7 Qe6+=) 15.Nc7+– (15.Nc7 Kd8 16.Nd5 Nd5 17.d4+–) 1–0. GuestDPNV – dashdemir, freechess.org, 2017.

4.a4 Nd7 5.Nf3 h6 6.c3 (6.e3 Ngf6=) 6...g5 (6...c5 7.bc6 bc6 8.Ba3=+) 7.d4 (7.c4 g4 8.Ng1 d4=+) 7...e4=+ 8.Nfd2 (8.Ba3 Qe6 9.Bf8 Nf8 10.Ng1=+) 8...Qf6 (8...e3!? 9.fe3 Qe3-/+) 9.g3 (9.c4 Qf5+=) 9...h5 10.Bg2 (10.Qb3 Ne7=) 10...Nh6 (better 10...h4 11.gh4 gh4=+) 11.Ne4?? (better 11.Qb3 c6 12.c4+=) 11...de4-/+ 12.Be4 Bd6 13.Nd2 Ng4 (13...h4 14.Bg2-/+) 14.Bf3 Qe7 15.Nc4 Ngf6 16.Nd6 cd6 17.c4 g4 18.Bg2 Ne4 (18...h4 19.gh4 Rh4 20.Qd3-/+) 19.d5 Ndf6?? (19...f6 20.Bd4-/+) 20.Qd3?? (better 20.Ra3!? Bf5 21.Re3+-) 20...Bf5?? (20...Nc5 21.Qd4 Ncd7=+) 21.Bf6?? (better 21.Be4 Be4 22.Bf6 Bd3 23.Be7 Bc4 24.Bd6+=) 21...Qf6-+ 22.Qd1?? (better 22.0-0 Nc5 23.Qe3 Qe5 24.Qe5 de5 25.a5-/+) 22...Qc3 (better 22...Nf2 23.Qc1 Nh1 24.Bh1 h4 25.Qe3 Kd7-+) 23.Kf1 0-0-0 (23...h4 24.Rc1 Qf6 25.Qe1-+) 24.Kg1 (24.h4 Rhe8 (24...Qc4 25.Rc1 Nc3 26.Qd2 Qa4 27.Qc3 Kb8 28.Qf6+=) 25.Rc1 Nd2 26.Kg1 Qb2-+) 24...h4 25.Qd3?? (25.b6 a6 26.Rc1-+) 25...Qa1 26.Bf1 hg3 (better 26...Ng3 27.Qf5 Nf5 28.b6-+) 27.fg3 Qe5 (better 27...Rh3 28.Qe3 Ng3-+) 28.Kg2 (28.Qe3-+) 28...Nc5 (28...Ng5 29.h4 Bd3 30.e4 Qb2 31.Be2 Qe2 32.Kg1 Nf3) 29.Qd2 Be4 30.Kg1 Bh1 31.Kh1 Qg3 32.e3 (32.h3 Rh3 33.Bh3 Rh8 34.Qh6 Rh6 35.a5 Rh3) 32...Qf3 (32...Ne4 33.Bh3 Rh3 34.Qg2 Rdh8 35.Kg1 Qe3 36.Kh1 Qc1 37.Qf1 Qf1) 33.Bg2-+ Qf5 34.Qe1 Nd3 (better 34...Qe5 35.Qg1-+) 35.Qe2 Nf2 36.Kg1 g3! 37.hg3 (37.hg3 Qg4 Double attack (37...Qg4 Decoy)) 37...Nh3 38.Bh3 Qh3 (better 38...Rh3 39.Qg2-+) 39.Qg2 Qg4 40.Kf2 Rde8 41.e4 (41.Kg1 Qd1 42.Kf2 Qd2 43.Kg1 Qe1 44.Qf1 Qg3 45.Qg2 Qe1 46.Qf1 Reg8) 41...Qd1 (41...Re4 42.Qf3 Rh2 43.Kg1 Qf3 44.Kh2 Re2 45.Kh3 Qh5) 42.Qf1 Qd2 (42...Rh2 43.Ke3 Qd2 44.Kf3 Qc3 45.Kg4 Rg8 46.Kf4 Qg3 47.Kf5 Qe5) 43.Kf3 f5! 44.Qe2 (44.ef5 Re3 Mate attack) 44...fe4 45.Kf2 (45.Qe4 Rhf8 46.Qf5 Rf5 47.Kg4 Rg5 48.Kf3 Qe2 49.Kf4 Qe3) 0-1. nookieee (1710) - mihoga20 (2010), Rated Blitz tournament, lichess.org, 2014.

4.a4 f5 5.Nf3 Nd7 6.Ba3 Qe6 (6...Qf6 7.e3=) 7.e3 (7.Bf8 Nf8 8.e3 Nf6=) 7...Bd6 8.Bd6 Qd6 9.Be2 Ne7 10.0-0 0-0 11.c4 c6 (11...e4 12.Nd4=) 12.d4= e4 13.c5 (13.Nfd2 f4=) 13...Qh6 (13...Qf6 14.Nfd2 Nc5 15.bc6 bc6 16.Na3-/+) 14.Ne1 f4 15.ef4 Qf4 16.Ra3 Nf6 (16...b6 17.f3=) 17.Qd2 Qc7 18.h3 Ng6 19.Nc2 Nf4 20.Rc1 Be6 21.Bf1 Rae8 22.Nc3 g5 (22...Nd7 23.a5=) 23.Ne3 (23.a5 g4 24.b6 ab6 25.ab6 Qb8+=) 23...h5 (23...g4!?=) 24.Rb1 Qg7 25.Ne2 Nh7 26.Rab3 (26.Nc1 Nf6+=) 26...Nd3= 27.Rd3 (27.bc6!? bc6 28.Nd1=) 27...ed3=+ 28.Qd3 Qf6 29.f3 Bf5 30.Nf5 Qf5 31.Qf5 Rf5 32.Rb3 (32.bc6 bc6 33.Ng3 Rf4 34.Nh5 Rd4=) 32...g4 (32...Rf7 33.Kf2=+) 33.Ng3 (33.fg4 hg4 34.hg4 Rg5=) 33...Rf4=+ 34.Nh5 Rd4 35.hg4 (35.bc6!? bc6 36.Rb7=) 35...Ra4=+ 36.Bd3 (36.bc6 bc6 37.Rb7 Re6=) 36...Re7-/+ 37.bc6 bc6 38.Bg6? (better 38.Rb8!? Nf8 39.Rc8=+) 38...Nf8-+ 39.Rb8 Ra1 40.Kf2 d4 (40...Ra2!? 41.Kg3 Ra5=+) 41.Bf5 Kf7 (better 41...Ra2 42.Kg3 Ra5=) 42.Rd8? (42.Rc8 a5=) 42...Rd1 (42...Ra2 43.Kg3 Ra5-/+) 43.g5? (better 43.Rd6=) 43...Ne6?? (better 43...Rd2 44.Kg3 Re5 45.g6 Ng6 46.Bg6 Kg6 47.Nf4 Kf7 48.Rd7 Ke8 49.Ra7 Rc5-+) 44.g6 1-0. BLEFOUT (2550) - uditkamdar (2290), Rated Classical game, lichess.org, 2016.

4.a4 Bf5 5.Na3 Nd7 6.c4 d4 7.d3 Qb4 8.Qd2 Qa4 9.Nc2 Qb3 10.Ba3 Ngf6 11.Bf8 Nf8 12.Na3 e4 13.Qc2 Qc2 14.Nc2 ed3 15.ed3 0-0-0 16.Ra7 Kb8 17.Ra3 Bg4 18.Be2 Re8 19.h3 Bf5 20.Kd2 Ng6 21.g4 Bd7 22.Nd4 Nf4 23.Bf3 Re7 24.c5 Rhe8 0-1. kavensis – Innominato, Rated Classical game, lichess.org.

4.a4 Qf6 5.Nc3 (better is 5.a5+=) 5...Bb4?? (better is 5...d4 6.Ne4 Qf4+=) 6.Nd5+– Qd6 7.Nb4 Qb4 8.Be5 Qc5?? (8...Nf6+–) 9.Bg7 1–0. Wall,Bill – Indigo, internet, 2000.

4.d4 Qb4 5.c3?? (better is 5.Bc3 Qb5 6.e3=) 5...Qb2–+ 6.Nd2 Qc3 7.Rc1 Qd4 8.Rc7 Nd7 9.e3 Qb6 10.Qc2 (10.Rc2 Nc5–+) 10...Ne7 (better is 10...Nc5 11.Rc5 Bc5 12.Qb2–+) 11.Ngf3 g6 (11...a6 12.a4–+) 12.Be2 Bg7 13.0-0 e4 14.Ng5 (14.Nd4 Be5 15.Rc3 Bd4 16.ed4 Qd4–+) 14...Be5 15.Rc3 Bc3 16.Qc3 f6 17.Nh3 0-0 18.a4 Qc5 19.Qb3 a5 20.Ne4 (20.ba6 ba6 21.Ne4 Qa5–+) 20...Qb4 21.Qa2 (21.Qb4 ab4 22.Ng3 Ra4–+) 21...Qe4 22.Bf3 Qc4 23.Qa3 Re8 24.Rd1 Ne5 25.Nf4 Nf3 26.gf3 g5 (26...Qc2!? 27.Qa1–+) 27.Nh5 Rf8 (better is 27...Kf7 28.Qb2 Ng8–+) 28.Qe7+/– Rf7 29.Qe8 Rf8 30.Nf6 Kg7 31.Qe7?? (better is 31.Nh5 Kh6 32.Qf8 Kh5 33.Qf7 Kh6 34.h4 gh4 35.Rd5 Qd5 36.Qd5+–) 31...Rf7–/+ 32.Ne8 Kg6 33.Qd6 Kh5 34.Nf6 Rf6! 35.Qf6 d4 36.Rd4 Qe6 37.Qg7 h6 38.f4 gf4 39.Rf4 Qg6 40.Qg6 Kg6 41.Rf8 b6 42.f4?? (better is 42.Rd8=) 42...Bb7–+ 43.Ra8 Ba8 44.Kf2 Be4 45.Kg3 Kh5 46.Kh3 Bc2 47.Kg3 Ba4 48.f5 (48.Kf3–+) 48...Bb5 49.f6 Kg6 50.f7 Kf7 0–1. madik – revhedge, gameknot.com, 2009.

4.e3 (--> 3.e3 d5 4.b5).

4.Nf3 d4 5.e3 a6 6.a4 (6.ed4 ed4 7.Qe2 ab5 8.Qe7 Ne7 9.Bb5 c6+=) 6...ab5 7.Bb5 c6 8.Bc4 b5 (8...Bg4 9.h3 Bh5 10.g4=) 9.Bb3 (9.ab5!? Ra1 10.Ba1+/-) 9...ba4= 10.Ba4 g6? (better 10...Ra6=) 11.Bc6!+- Nc6 12.Ra8 Qb7 13.Ra2?? (better 13.Rc8 Qc8 14.ed4+-) 13...Be6= 14.c4?? (14.Ra4 Qb2 15.ed4 ed4=) 14...Bc4?? (14...dc3 15.Nc3 Ba2 16.Na2 Qb2 17.Qa4-+) 15.Ra4?? (better 15.Qa4 Ba2 16.Qa2=) 15...Bb3-+ 16.Ra8 Nd8?? (better 16...Ke7 17.Qe2 Qa8-+) 17.Rd8=+ Kd8 18.Qc1 Be7 (18...Bd5 19.Ne5 f6 20.Nf3 Bf3 21.gf3 Qf3 22.0-0=) 19.0-0 (19.Ne5 Bd5 20.Bd4+/- (worse 20.ed4 Bg2 21.Qc2 Be4=+)) 19...Nf6?? (19...Bd5!? 20.Ne1 Qb6=) 20.ed4 (better 20.Ne5!? Bd5 21.Bd4+-) 20...ed4 (20...e4!? 21.Ne5 Bd5+/-) 21.Bd4 Ke8?? (better 21...Re8!?+/-) 22.Re1 (better 22.Qb2 Bd5 23.Bf6 Qb2 24.Bb2 f6+-) 22...Rg8?? (22...Be6 23.Ng5+-) 23.Qc3 (23.Bf6 Be6 24.Be7 Qe7+-) 23...Bd5?? (better 23...Nd5 24.Qb2 Nf4+-) 24.Bf6 Be6 25.Bd4 (25.Ng5 Qd7+-) 25...Bb4 (25...Qd5 26.Qe3+-) 26.Qe3 (26.Qb2!? g5 27.Bc5 g4+-) 26...Qd5 (26...Be7 27.Ng5 Qd5 28.Nh7+-) 27.Ng5 Kd7 28.Nc3 Bc3 29.dc3 Re8 (29...Qc4 30.Rd1 Kc8 31.Ra1+-) 30.Nh7 Kc6 (30...Qc6 31.Nf6 Ke7+-) 31.Nf6 Bd7 32.Ne8 Be8 33.Qe8 (33.Qe8 Qd7 34.Qa8 Qb7 35.Qf8 Qb6 36.Qe8 Kd5 37.Qf7 Kc6 38.Re6 Kd5 39.Rb6 Ke4 40.Qf3) 1-0. Fuirio (1675) - SER174, Rated Classical game, lichess.org, 2013.

4.Nf3 f6 5.d4 c6 (better 5...e4!? 6.Ba3 Qd7=+) 6.de5+= fe5 (6...Qb4 7.Bc3 Qb5 8.e4+=) 7.bc6 (7.Ne5!? Nf6 8.e3+=) 7...Nc6= 8.e3 (8.Qd5 Nf6 9.Qb3 e4+=) 8...Nf6=+ 9.Bb5?? (better 9.Nbd2=+) 9...Qb4-+ 10.Nc3 (10.Nbd2 Qb5 11.Be5 Ne5 12.Ne5-+) 10...Qb2 11.Rb1 (11.Bc6 bc6 12.Na4 Bb4 13.Kf1 Ba6 14.Kg1-+) 11...Qc3 12.Qd2 Qd2 13.Nd2 a6 14.Ba4 (14.Bc6 bc6 15.c4 Bf5-+) 14...b5 15.Bb3 Bb7 16.Bd5 (16.c3 Rc8 17.Ke2 Ba3-+) 16…Nd5 0-1. GrubyRycho – Kolera, Rated Blitz tournament, lichess.org, 2014.

5.Bf8 Kf8 6.e3 c5 7.Nc3 (7.c4 Ne7=) 7...Ne7 (7...Be6 8.Qf3=) 8.Nge2 (8.Qf3 Qf3 9.Nf3 e4=) 8...g6 (8...Kg8 9.f4+=) 9.d4 (9.Ng3 Kg7=) 9...ed4 10.ed4 c4 11.Qd2 Kg7 12.Nf4 Be6 (12...Rd8 13.Be2=) 13.Be2 g5?? (better is 13...a6=) 14.Nh5+– Kg6 15.Nf6 Kf6 16.h4 gh4 17.Rh4 1–0. Roczniak,Jan – Tyll, Poland (year?).

5.Bf8 Kf8 6.e3 e4 7.Nc3 Nd7 8.Nd5 Qd6 9.c4 Ne7 10.Nc3 a6 11.Ne4 Qe5 12.Qb1 Ng6 13.Nf3 Ke7 14.Ne5 Normal 1-0. nikSAMARA - _Tristan_, Rated Blitz game, lichess.org, 2015.

5.Bf8 Kf8 6.e3 Bf5 7.Nc3 Ne7 8.Qf3 Bc2 9.d3=.

5.Ba3 Qe6 6.Bf8 Kf8 7.Nf3 b6 (7...c5 8.e4=) 8.h3 (8.e3 a6=) 8...Bb7 9.Ng5 (9.e3 a6=) 9...Qf5 (9...Qf6 10.Nf3=+) 10.Nf3 e4 (better 10...a6 11.Na3 Qf6=+) 11.Nd4+/- Nf6?? (better 11...Qd7 12.e3 Nf6+/-) 12.Nf5+- c6 (12...g6 13.Ng3+-) 13.Nd6 1-0. TWW_LONDON (1845) - eyad77 (1825), lichess.org, 2021.

5.e3 a6 6.ed4 ed4 7.Be2 c5 (7...d3 8.cd3 ab5 9.ab5 Ra1 10.Ba1=) 8.bc6 Nc6 9.d3?? (9.Nf3!?=) 9...Nf6 (9...Qb4 10.Nd2 Qb2 11.Bf3-+) 10.Nf3?? Exerts pressure on the isolated pawn (10.c3 Nd5=+) 10...Qd6 (better 10...Qb4 11.Nbd2 Qb2-+) 11.0-0= Be7 12.Nbd2 Be6 13.Re1 0-0 14.Bf1 (14.Nb3 Bb3 15.cb3 Rfe8=) 14...Bg4 (14...Rad8 15.Nb3 Qb4 16.Qc1=+) 15.Ne4 (15.Be2!? Qd7 16.Nc4=) 15...Ne4=+ 16.Re4 Increasing the pressure on the isolated pawn on d4 16...h5 (16...Bf5 17.Ba3 Qc7 18.Be7 Be4 19.Bf8 Bf3 20.Qf3 Rf8 21.Rc1=+) 17.Qe2 (better 17.h3 Bf3 18.Qf3=) 17...Bf6?? (17...Qf6 18.h3 Bf3 19.gf3=+) 18.h3 (better 18.Ba3!? Qd7 19.Bf8 Rf8 20.Qd1+/-) 18...Bf5= 19.Rh4? (better 19.Ba3 Qd7 20.Bf8 Be4 21.de4=+) 19...Rae8 (19...Rfe8!? 20.Qd1 Bh4 21.Nh4-+) 20.Qd1-/+ Bh4 21.Nh4 Qf6 22.Qh5 Bg6 (22...Bh3 23.Nf3 Be6-/+) 23.Qg4=+ Ne5 (23...Re6 24.Rb1=+) 24.Qg3 (24.Qd4!? Re6 25.f4 Qh4 26.fe5+=) 24...Rd8=+ 25.Ng6 (25.Re1 Rfe8=+) 25...fg6 (25...Ng6 26.Re1-/+) 26.Ba3 (26.Re1!? Nc6 27.Re4=) 26...Rfe8=+ 27.Rb1 Qc6 28.Rc1?? (28.f4 Nf7 29.Rb4 Qc2-/+) 28...b5 (better 28...Qc3!? 29.f4 Qa3 30.Rb1-+) 29.ab5? (29.Re1 Nf7 30.Re7 ba4-/+ (30...Qc2?! 31.Qg6 Qa2 32.ab5+=)) 29...ab5?? (better 29...Qc3 30.Rb1 Qa3-+) 30.Bb4 Ra8 31.Be2 Ra2 Exerts pressure on the backward pawn 32.Bd1 Qd5 33.Qg6?? (33.f4 Rb2 34.Bd2= (worse 34.fe5 Rb4 35.Ra1 Qe5 36.Qg6 Ra4-/+)) 33...Ng6-+ 34.Bf3 (34.Bf3 Qg5 35.Rf1 Rc2 36.Bd6-+). brucepeng (1925) - koune (1930), lichess.org, 2020.

5.e3 c5 6.bc6 bc6 (6...Nc6 7.Bb5 de3 8.de3=) 7.Nf3= de3 8.fe3 Kd8 (better 8...e4 9.Nd4 Nf6=) 9.Be5 Qe5?? (better 9...Bg4 10.Bd4 c5+/-) 10.Ne5+- Bd6 (10...Be6+-) 11.Nf7 Ke7 12.Nh8 (12.Nh8 Nf6 13.Bc4+-) 1-0. brucepeng (1955) - Tulga45 (1855), lichess.org, 2020.

5.e3 de3 6.de3 g6 (6...Nf6 7.Nd2=) 7.Nd2 Bg7 8.Ngf3 Nd7 9.Be2 Nh6 (9...Nc5 10.Ba3 e4 11.Nd4+=) 10.0-0 0-0 (10...f5 11.a5+=) 11.c4 (better 11.Ba3!? Nc5 12.Ne4+/-) 11...c6 12.Re1 cb5 13.ab5 a6? (13...Rd8 14.Ba3 Nc5 15.Qc2+=) 14.h3 (better 14.Ba3 Nc5 15.Ne4+-) 14...Nc5 15.Qc2 Bf5 (15...Rd8 16.Ba3=) 16.e4+= Bd7 (16...Bc8 17.Nb3 Nb3 18.Qb3+/-) 17.Nb3 (17.Ba3 f5+/-) 17...ab5 18.Ra8 Ra8 19.Nc5 Qc5 20.Rc1 (20.Qd3 Be6 21.cb5 f6+=) 20...Rc8 (better 20...b4=+) 21.Bd1?? (21.Qd3!? Qe7 22.cb5 Rc1 23.Bc1+/-) 21...f6?? (better 21...bc4!? 22.Qc3 b5-+) 22.cb5 (22.Qd3 Rd8 23.Qd5 Qd5 24.cd5 Nf7=) 22...Qc2 (22...Qb5 23.Qb3 Qb3 24.Bb3 Kf8 25.Rc8 Bc8 26.Kf1=+) 23.Rc2 (better 23.Bc2!? Nf7 24.Bd3=) 23...Rc2-/+ 24.Bc2 Bb5 25.Ba3 Bf8 26.Bf8 Kf8 27.Nd2 Ke7 28.Nb3 (28.Bb3 Nf7-/+) 28...Kd6 29.g3 b6 30.Kg2 Bc4 31.Nd2 Kc5 32.h4 (32.Kf3 Be6-+) 32...b5 33.Nc4 (33.Kf3 Kd4 34.Bd1 b4-+) 33...Kc4 34.f3 b4 35.Bb1 Kc3 36.g4 (36.f4 Ng4-+) 36...Kb2 37.Bd3 b3 38.Kg3 Kc1 39.f4 ef4 40.Kf4 b2 41.h5 (41.g5 Ng8 42.Kg4-+) 41...g5 42.Ke3 (42.Kg3 b1Q 43.Bb1 Kb1-+) 42...b1Q (better 42...Ng4 43.Kd4 Nf2-+) 43.Bb1 Kb1 44.Kd4 Kc2 (better 44...Ng4 45.Kd5-+) 45.Kd5 (45.e5 Ng4 46.e6-+) 45...Ng4 46.Ke6 Kd3 47.Kf7 (47.Kf5-+) 47...Ke4 48.Kg7 f5 (48...h6 49.Kf8 f5 50.Kf7 f4 51.Ke7 f3 52.Kd6 f2 53.Kc5 f1Q 54.Kd6 Qc4 55.Kd7 Ne5 56.Kd6 Qc6 57.Ke7 Qd7 58.Kf6 Qf7) 49.Kh7 f4 50.Kg7 f3 51.h6 Nh6! 52.Kh6 g4 53.Kg5 f2 54.Kg4 (54.Kf6 f1Q 55.Ke6 Qa6 56.Kf7 Qd6 57.Kg7 g3 58.Kf7 g2 59.Ke8 g1Q 60.Kf7 Qgg6) 54...f1Q 55.Kg3 (55.Kg5 Qf5 56.Kh6 Qg4 57.Kh7 Ke5 58.Kh6 Kf6 59.Kh7 Qg7) 55...Qf4 (55...Qg1 56.Kh4 Kf4 57.Kh5 Qg5) 56.Kh3 (56.Kg2 Qf3 57.Kh2 Qg4 58.Kh1 Kf3 59.Kh2 Qg2) 56...Qg5 57.Kh2 Kf3 (57...Kf3 58.Kh3 Qg3) 0-1. brucepeng (1930) - Zuarkar (1915), lichess.org, 2020.

5.Ba3 Qe6 6.Bf8 Rf8 7.d3 Nbd7 (7...a6 8.ba6 Qa6 9.Nf3 Qa5 10.Qd2-/+) 8.Nd2 b6 (8...d4 9.c3=+) 9.e3 Bb7 10.Ngf3 h6 (10...a6 11.Be2=) 11.Be2 Nc5 Black intends e4 (11...c5 12.bc6 Bc6 13.a5=) 12.0-0 g5 (12...Ncd7 13.a5+=) 13.a5 Rg8 (13...Ncd7 14.d4+/-) 14.d4+/- e4 15.dc5 ef3 16.Bf3 Rd8? (better 16...g4!? 17.Be2 bc5+/-) 17.c6 (17.ab6!? ab6 18.Ra7 Bc8 19.Rc7 bc5 20.Rc5 Bb7+-) 17...Bc8 18.ab6 ab6 0-1. brucepeng (1845) - MrSparkles (1885), lichess.org, 2019.

5.e3 Nbd7 6.c4 d4 (6...Nb6 7.cd5 Nbd5 8.a5=+) 7.Nf3 (7.ed4!? ed4 8.Qe2=) 7...de3 (7...d3 8.e4 Qb4 9.Qc1 Ne4 10.Bd3-/+) 8.de3 g6 (8...e4 9.Nd4=) 9.Be2= Bg7 10.0-0 0-0 11.Nc3 a6 (11...e4 12.Ba3 Nc5 13.Nd4=) 12.Qc2 (12.Ba3 Nc5+=) 12...ab5 13.ab5 Ra1 14.Ba1 (14.Ra1 Nc5 15.Ba3 Bf5+/-) 14...Nc5 Black plans e4 15.Nd5 Nd5 16.cd5 e4 (16...b6 17.Nd2+=) 17.Bg7+= Kg7 18.Nd4 Qd6 19.Rc1 b6 20.Qc4 Bb7 21.Nc6 h5 (21...Ra8 22.Rd1+=) 22.Rd1 Kh7 23.g3 (23.Qc2 Ra8+=) 23...Qf6 24.Bf1 Re8 25.Qd4 (better 25.Na5+=) 25...Bc8?? (25...Kg7 26.Qd2+=) 26.d6 (better 26.Qf6 Kg8 27.Ne7 Re7 28.Qe7+-) 26...Qd4 (26...Qd6 27.Qd6 cd6 28.Rd6=) 27.Rd4 (better 27.ed4!? cd6 28.dc5 dc5 29.Bc4+-) 27...cd6= 28.Rd6 Bg4 (28...Nb7 29.Rd4=) 29.h3 (29.Nd4 Rb8+=) 29...Be6 (29...Nb7 30.Rd4 Bf5 31.Nb4+=) 30.Nd4 Nd3? (30...Rb8 31.Kg2 Kg7 32.Be2+=) 31.Bd3 (31.Rb6 Bc4+-) 31...ed3 32.Ne6 Re6 33.Rd3 Kg7 34.Kf1 Kf6 (34...Re5 35.Rb3+/-) 35.Ke2 (35.f4 Ke7+-) 35...Kf5 (35...Re5 36.Rb3+/-) 36.f3 (36.f4 Kf6+-) 36...g5 (36...Re5!? 37.e4 Ke6+/-) 37.e4+- Kf6 38.Ke3 Re7 (better 38...Kg7+-) 39.Rd6 Ke5 (39...Re6 40.Re6 Ke6+-) 40.Rb6 Rc7 (40...Re6 41.Re6 Ke6+-) 41.Rc6 (41.f4 gf4 42.gf4) 41...Rb7 (41...Rc6 42.bc6 Kd6+-) 42.b6 (42.f4 gf4 43.gf4) 42...f5 (42...Rb6 43.f4 gf4 44.gf4) 43.Rc5 (43.f4 gf4 44.gf4) 43...Kf6 (43...Ke6 44.Rf5 Rb6 45.Rg5 Rb3 46.Kf4+-) 44.Rf5 Kg6 45.Rb5 g4 (45...Kf6 46.f4+-) 46.hg4 hg4 47.f4 Kf6 48.f5 Kg5 49.Rb4 Kf6 (49...Rb8+-) 50.Rb5 (50.Kf4!? Ke7+-) 50...Kg5 51.Rb4 Rb8?? (51...Kf6 52.Kf4 Ke7+-) 52.b7+- Kf6 53.Kf4 Ke7 54.e5 Kf7 55.Rb6 White prepares the advance f6. White intends e6 55...Ke7 56.f6 Kf7 57.Kf5 Kf8 (57...Ke8 58.e6 Kd8 59.e7 Kd7 60.Re6 Rg8 61.f7 Rg5 62.Kg5 Ke6 63.e8Q Kd5 64.b8Q Kc5 65.Qee5 Kc6 66.Qbc7) 58.e6 (58.Rc6 Re8 59.Rc8 Kf7 60.Re8 Ke8 61.e6 Kd8 62.b8Q) 58...Ke8 (58...Kg8 59.Kg6 Kf8 60.Rc6 Rd8 61.Rc8 Ke8 62.Rd8 Kd8 63.b8Q) 59.Rd6 (59.Rc6 Kd8 60.f7 Ke7 61.Rc8 Rc8 62.bc8Q Kd6 63.f8Q Kd5 64.Qfc5) 59…Kf8 (59...Kf8 60.Rc6 Kg8 61.Kg6 Rd8 62.e7 Re8 63.f7 Kh8 64.fe8Q). KLINGON09 (1815) - md1367 (1835), lichess.org, 2019.

5.Nf3 e4 6.Nd4 c5 7.bc6 Nc6 8.Nc6 (8.e3 Qd8=) 8...bc6=+ 9.e3 Rb8 10.Qc1 Qb7 (10...Ng4!?-/+) 11.Be5= Ra8 12.c4 Be6 (12...Nd7 13.Bg3 Nc5 14.cd5 cd5 15.Qd1=) 13.Bf6 gf6 14.cd5 cd5 15.Nc3 a6 16.Be2 Rg8 17.g3 Bh3 18.Bh5 (18.Qb1 Qc6=) 18...Rg5 19.Be2 Rc8 20.Rb1 Qc6 21.Qb2 Bd6 (21...Bg4 22.h4 Rg6 23.Bg4 Rg4 24.Qb6+=) 22.Qb3 (22.Qb6 Ke7+=) 22...Be6 (22...Rb8 23.Qd1 Rb1 24.Qb1=+) 23.Qb2 (better 23.Qb6!? Qb6 24.Rb6+/-) 23...Be5 24.0-0 h5 (24...Rb8 25.Qc2=) 25.Rfc1 (25.Qb7 Bc3 26.dc3 Qb7 27.Rb7 a5+=) 25...Qd6 (25...h4 26.Qb6 Qb6 27.Rb6=) 26.Bf1 (26.Qb7 h4 27.Qa6+= (27.Ba6 hg3 28.Rb6 gh2 29.Kh1 Qb6 30.Qb6 Bh3 31.Qb5 Kf8-+)) 26...h4=+ 27.Ne2?? (better 27.d4 ed3 28.f4 hg3 29.fg5 gh2 30.Kh1 fg5 31.Qd2=) 27...hg3 (27...Bb2 28.Rc8 Bc8 29.Rb2-+) 28.fg3 (28.Qb7 Rc1 29.Rc1 gh2 30.Kh1-+) 28...Ke7 (better 28...Bb2 29.Rc8 Bc8 30.Rb2-+) 29.Rc8?? (better 29.Qb7!? Kd8 30.Rb6+/-) 29...Bc8 (better 29...Bb2 30.Ra8 Qb4-+) 30.Qb4 Bg4 (better 30...Qb4 31.Rb4 Kd6=) 31.Qd6+/- Bd6 32.Nf4 (32.Rb7 Kf8+/-) 32...Bf4 (better 32...Bc8!?+=) 33.ef4+- Rg8 34.Rb6 (34.Rb7 Ke6 35.Ba6 Ra8 36.Rb6 Ke7+-) 34...a5 (34...Rc8 35.Ra6 Rc2 36.h3=) 35.Ra6 (35.Rb7 Ke6 36.Bb5 f5+/-) 35...Rc8 36.Kf2 (36.Ra5 d4 37.h3 Bd7+/-) 36...Rc5 37.Bb5 (37.Ra7 Kd6 38.Ke3 Bf3+/-) 37...Rc2 (37...d4 38.Ra5 Rc2 39.Ra7 Kf8 40.Kf1=+) 38.Ke1 (38.Ke3!? f5 39.h4+=) 38...Rc1 (38...d4 39.Ra8= (39.Ra5 e3 40.de3 de3 41.Ra7 Kf8 42.Rc7 Rc7 43.Kf1 Bf3 44.Kg1 Rc1 45.Bf1 e2 46.Kf2 ef1Q 47.Ke3 Qe2 48.Kd4 Qe4)) 39.Kf2= Rd1 (better 39...d4!? 40.Ra7 Kf8=) 40.Ke3+/- (worse 40.Ra5 d4 41.Ra7 Kf8=+) 40...f5 41.Ra5 (better 41.d3!?+/-) 41...d4= 42.Kf2?? (42.Kd4 Rd2 43.Kc5 Rc2 44.Kb4 Rh2=) 42...e3?? (better 42...Rd2 43.Kf1 e3-+ (43...Rh2?! 44.Ra7 Ke6 45.Bc4 Kd6 46.Bb5-+)) 43.de3= de3?? (better 43...Rd2 44.Kg1 Rd1 45.Kg2 Rd2 46.Kf1 Rd1 47.Kf2 Rd2 48.Kf1 Rd1 49.Kf2=) 44.Ke3+- Re1 45.Kd4 Re4 (45...Rh1 46.Ra7 Kf6 47.Bc4+-) 46.Kc5 Kf6 (46...Re1 47.Ra8 Kf6 48.a5+-) 47.Ra6 Kg7 48.Be8 (better 48.Rd6 Re1+-) 48...Re3?? (48...Re8 49.Rd6=) 49.Ra7?? (better 49.Bc6+-) 49...Kf6?? (better 49...Re8 50.a5 Bh3=) 50.Rf7+- (worse 50.Bf7 Rc3 51.Kd4 Rc2+-) 50...Ke6 51.Ra7 Rd3 52.Bb5 Rd5 53.Kb6 (53.Kb6 Rd6 54.Bc6+-) 1-0. brucepeng (2010) - Dmitry_Gladkikh (1975), lichess.org, 2021.

5.c4 Ngf6 6.e3 b6 7.cd5 Bb7 8.Nc3 0-0-0 9.Be2 h5 10.d4 g5 11.g3 h4 12.Ne5 hg3 13.fg3 Ne5 14.de5 Qe5 15.Qb3 Nd5 16.0-0-0 Qe3 17.Kb1 Nc3 18.Qc3 Qc3 19.Bc3 Rh6 20.Rhf1 Bd5 21.Bf6 Rd6 22.Bg5 Rh2 23.Bg4 Kb7 24.Bf3 Bf3 25.Rd6 Be4 26.Kc1 Bd6 27.Rf7 Bg3 28.Bf4 Bf4 29.Rf4 a6 30.a4 Bd5 31.Rd4 Be6 32.Re4 Rh6 33.ba6 Ka6 34.Rd4 c5 35.Rd6 Ka5 36.Kb2 Time forfeit 1-0. carloscamchang (1765) - junken (1660), Rated Blitz game, lichess.org, 2015.

5.d4 Qb4 6.Bc3 Qb5 =.

5.e3 f5 6.Be2 Ngf6 7.0-0 c5 8.c4 e4 9.Ne1 g6 10.Nc3 Bg7 11.Nc2 Nb6 12.a4?? a5?? 13.Nd5+= Nbd5 14.cd5 Nd5 15.Bg7 Qg7 16.d3 ed3 17.Qd3+= Nb4 18.Nb4+/– cb4 19.Qc4 Qf7 20.Bf3?? Qc4–+ 21.Rfc1 Qe6 22.Rd1 Qf6 23.h3 0-0 24.Bd5 Be6 25.Bb7 Rac8 26.Bc8 Rc8 27.Rd4 Rd8 28.Rad1 Rd4 29.Rd4 b3 30.Rd1 b2 31.Rb1 Ba2 32.Rb2 Qb2 (33.h4 Bc4–+) 0–1. stoker – Space, Live Game Caissa's Web, 2005.

5.e3 Ngf6 6.Nc3 =+.

5.e3 g6 6.c4+= c6 7.a4 (7.bc6 bc6 8.Qa4 Rb8 9.Qc6 Bg7+=) 7...Bg7= 8.Qc2 Nh6 (8...h6 9.bc6 bc6 10.cd5 cd5 11.Bb5+=) 9.Be2 0-0 (9...Nf5!?=) 10.cd5 cd5 11.Nc3 (11.Ba3 Qd8 12.Bf8 Nf8+/-) 11...Nf6? (11...Qe6 12.Ng5 Qf6 13.h4+=) 12.0-0 (better 12.Ba3!? Qc7 13.Bf8 Kf8 14.Rc1+-) 12...Bf5 13.d3 Rac8 14.Rfc1 Rc7? (better 14...Rfd8 15.Qd1 d4 16.ed4 ed4=) 15.Ba3+- Qe6 16.Bf8 Bf8 17.Qb2 Bg4 18.Nd1 Re7 19.Rc2 Bg7 20.Rac1 Re8 21.Rc7 Bf3 22.Bf3 e4 23.de4?? (23.Be2 ed3 24.Bd3 Nfg4+-) 23...Ne4?? (better 23...de4 24.Be2 Nd5+=) 24.Qc2 Be5 (24...Re7+-) 25.Be4 (better 25.Rb7 Bb8 26.Qc6+-) 25...Bc7+/- 26.Qc7 de4 27.Qb7 Ng4 (27...Qd6 28.Qc6 (28.Qa7? Qd2 29.h3 Qc1-+) 28...Qe7 29.a5+-) 28.Qc6 (28.h3!? Ne5+-) 28...Qe5 29.g3 (29.Qc7 Qe7+-) 29...Rf8 (29...Rd8 30.Nc3 Nf6 31.Ne2+/-) 30.Rc4 Qh5 31.h4?? (better 31.Qe4 Qh2 32.Kf1 Qh3 33.Ke2+-) 31...f5 (better 31...Ne5 32.Qe4 Qd1 33.Kg2 Nc4 34.Qc4 Rd8-+) 32.Qe6+- Kh8 33.Qe7 Threatening a5 33...Rg8 34.Rc7 g5 (34...Qh6 35.Ra7 g5 36.hg5+-) 35.Qc5 (35.f3 Qh6 36.fg4 Qg7+-) 35...Qg6 (35...Nf6 36.Qd4 Rf8 37.hg5 Qg5 38.Ra7+-) 36.Qc3 (36.Qd4!? Qf6 37.Qf6 Nf6 38.hg5 Ng4 39.Ra7 Ne5+-) 36...Nf6 37.h5 (37.hg5 Qg5 38.Ra7 Qg6+-) 37...Qh6 38.Kg2 (38.Qe5!? Rg7 39.Rc8 Rg8 40.Qf5 Qg7+-) 38...Rf8 39.Rc6 (better 39.Rc8+-) 39...Qh5+= 40.Rf6 (40.Nb2 Kg7+=) 40...Qf3= 41.Kh2 (41.Kh2 Qh5 42.Kg1 Qd1 43.Kg2 Qf3 44.Kf1 Qd1 45.Kg2 Qf3 46.Kf1 Qd1 47.Kg2=). FERNANDO_2013 (1965) - Nursat (1995), Rated Blitz game, lichess.org, 2017.

5.Nd4 Qb4 6.Qc1 Bc5?? (better 6...Nf6=) 7.a3+– Qa5? (7...Qd4 8.Bd4 Bd4+–) 8.Nb3 Qb5 (8...Qb6 9.Nc5 Nf6+–) 9.Bg7 Bb6 (9...Be7 10.Nc3 Qd7 11.Bh8+–) 10.e3 Qd7 11.Bh8 f6 (11...Ne7 12.Nc3+–) 12.a4 Nh6 (12...a6 13.c4+–) 13.a5 Qf7 (13...Kf7 14.ab6 cb6 15.c4+–) 14.ab6 Qg8 1–0. DEFFM – LINTOLINTOPPY, freechess.org, 2019.

5.Nd4 c5 6.bc6 bc6 7.e3 a5 8.Be2 Ba6 (8...Qg5 9.g3=) 9.0-0 Nf6 10.Ba3 (10.f3 Qe5=) 10...c5 11.Ba6 (11.Nc3 Qd7 12.Nb3 Be2 13.Qe2 Qc7=) 11...Ra6 (11...Na6 12.f3=+) 12.Qe2 (12.Nc3 Qd8 13.Ndb5 Rb6=) 12...Rb6 13.Nb3 (13.Nc3 Qc7 14.Ndb5 Qd7=) 13...Nbd7 (13...Qc7!? 14.Nc3 Bd6=) 14.d4 Qe6 (14...ed3 15.cd3 Qe5 16.N1d2=) 15.Nc5 (15.dc5 Rb8+=) 15...Nc5 16.Bc5 (16.dc5 Rc6 17.Qb5 Nd7+/-) 16...Bc5= 17.dc5 Rb7 (17...Rb2 18.Nd2 0-0 19.Nb3=) 18.Nc3 (18.c4 dc4 19.Rc1 0-0+=) 18...0-0= 19.Rab1 Rfb8 (19...Rb4 20.Qd2=) 20.Qd2+= h6 (20...Qc6 21.Qd4=) 21.Rb7 Rb7 22.Rb1 Rb1 23.Nb1 Qc6 (better 23...Qa6!? 24.Na3 a4+=) 24.Qa5+/- Nd7 25.Nc3 Nc5 (25...Kh7 26.Qb5 Qb5 27.Nb5 Nc5 28.Nc7+-) 26.Qd8 Kh7 27.Qd5 (27.Nd5?! Qb7 28.h4 Ne6+/-) 27...Qd5 28.Nd5 f5 29.Kf1 g5 (29...Kg6 30.c4+-) 30.Ke2 (better 30.Ne7 f4+-) 30...f4? (30...Kg6+-) 31.ef4 gf4 32.Nf4 Kg7 33.Ke3 Kf6 34.Kd4 Na4 35.Nd5 Kf5 36.c4 Nb2 37.c5 Nd3 38.c6 Ne5 (38...Ke6 39.Nf6! Ne5 40.c7 Nc6 41.Kc5+-) 39.c7 Nc6 40.Kc5 Na7 41.Ne7 Kf4 (41...Ke6 42.Kb6 Kd7 43.Kb7+-) 42.c8Q (better 42.Kb6 Ke5 43.Ka7+-) 42...Nc8 43.Nc8 e3 (43...Kf5+-) 44.fe3 Ke3 45.a4 Kf2 46.a5 Kg2 47.a6 Kh2 48.a7 h5 49.a8Q h4 50.Qa2 Kg3 51.Qb3 Kg2 52.Qc2 Kg3 53.Qd3 Kg2 54.Qe2 Kg3 55.Qf1 h3 56.Qh1 h2 57.Kd4 Kh3 (57...Kf4 58.Qh2 Kg4 59.Ke4 Kg5 60.Qf4 Kg6 61.Ne7 Kh5 62.Qg3 Kh6 63.Qg6) 58.Ke3 (58.Ke3 Kh4 59.Kf4 Kh5 60.Ne7 Kh6 61.Qg2 Kh7 62.Qg6 Kh8 63.Qg8; 58.Ke4 Kh4 59.Kf4 Kh5 60.Qg2 Kh6 61.Ne7 Kh7 62.Qg6 Kh8 63.Qg8) 1-0. FERNANDO_2013 (1925) - chess2018capablanca (1990), Rated Blitz game, lichess.org, 2018.

5.Nd4 Nf6 6.a4 Nbd7 7.Nf5 (7.e3 Ne5=) 7...Qe6 8.Ng3 Bc5 9.e3 Nb6 (9...0-0 10.Be2=+) 10.Be2 (10.Nh5 Nh5 11.Qh5 0-0=) 10...Bd7 (10...a5 11.d3=) 11.Nc3 (11.a5 Nc8=) 11...d4 (11...0-0-0!?=+) 12.ed4= Bd4 13.0-0 (13.a5 Nbd5=) 13...0-0 (13...0-0-0 14.a5 Nbd5 15.Nd5 Bb2 16.Nf6 gf6 17.Rb1+=) 14.Qe1 Nbd5 (14...a6 15.a5 Bc3 16.Bc3= (worse 16.dc3 Nc4 17.ba6 Ra6-/+)) 15.Bc4 Now all is on e4 15...c6 16.Nge4?? (better 16.Rb1 Bc3 17.Bc3=) 16...Ne4-+ 17.Ne4 (17.Nd5 cd5 18.Bd4 dc4-+) 17...Bb2 18.Rb1 (18.Nc5 Qd6 19.Nb7 Qf4 20.Bd5 cd5-+ (20...Ba1?! 21.bc6 Be5 22.g3=+)) 18...Bd4 19.Ng5 (19.c3 Rfe8 20.d3 Be5-+) 19...Qe1 (better 19...Qf6!? 20.Bd3 Qg5 21.Qe4-+) 20.Rfe1 h6 21.Nf3 Bb6 22.Ne5 Be6 (22...Rad8 23.h4-+) 23.Ng6?? (better 23.bc6 bc6 24.Nc6=+) 23...Rfe8 24.Nh4 (24.bc6 bc6 (24...fg6 25.cb7 Rad8 26.Re6 Re6 27.Bd5+/-) 25.Ne5 Ba5-+) 24...a6 (24...Nc3! 25.dc3 Bc4 26.bc6 bc6 27.Nf5-+) 25.bc6 bc6 26.Bd5 (26.Nf3 Ba5 27.Rb7 Bg4-+) 26...Bd5 27.Rb6 (27.Nf5-+) 27…Re1 0-1. chessbit (1825) - gabi2004 (1825), Rated Blitz game, lichess.org, 2020.

5.Ne5 =.

4.c4 Bf5 5.a4 Nf6 6.Nc3 g6 7.e3 Bg7 8.Qc2 0-0 9.Nf3 Nbd7 10.d4 ed4 11.e4 Be4 12.Ne4 Ne4 13.Bd3 Ng5 14.Kd1 Nf3 15.gf3 Rfe8 16.Be4 c6 17.Re1 Nc5 18.Qd2 Ne4 19.Re4 Qd7 20.Bd4 Re4 21.fe4 c5 22.Bg7 Kg7 23.Qd3 Re8 24.f3 Qh3 25.Ra2 Qe6 26.Re2 a6 27.Kc2 ab5 28.ab5 b6 29.Kb3 d5 30.Qd5 Qd5 31.cd5 Kf6 32.Kc4 Ke5 33.Kd3 Kf4 34.Rf2 Rc8 35.h4 c4 36.Kd4 c3 37.Rc2 Kf3 38.Rc3 Rc3 39.Kc3 Ke4 40.d6 Ke5 41.d7 Ke6 42.d8Q Normal 1-0. Vincent1890 (1685) – MrThysbe, Rated Bullet game, lichess.org, 2015.

4.c4 Nf6 5.Nc3 c6 6.a4 a6 7.e3 Bg4 8.Nf3 cb5 9.ab5 Nbd7 10.d4 e4 11.h3 Bf3 12.gf3 ef3 13.Qf3 Nb6 14.Qb7 Qb7 15.d5 Be7 16.Bg2 0-0 17.0-0 ab5 18.Nb5 Nc4 19.Bf6 Ra1 20.Ra1 Bf6 21.Rb1 Qe7 22.Rb3 Ra8 23.e4 Ra1 24.Bf1 Nd2 0-1. alkiviad (1690) - ramutol (1630), Rated Blitz game, lichess.org, 2014.

4.e3 Bd7 5.c4 c6 6.a4 cb5 7.ab5+/- Nf6 8.Nf3 Qd8 (8...Be6 9.Nc3 Nbd7 10.Be2+/-) 9.d4 e4 (9...Be6 10.Nc3+-) 10.Nfd2+- Bf5 11.h3 a6 (11...h6 12.Nc3+-) 12.Qb3 (12.Nc3 h6+-) 12...Be7 (12...h5 13.Nc3+-) 13.Be2 (13.g4!? Bg6+-) 13...0-0 14.Nc3 a5 (14...Bg6 15.Qc2+/-) 15.0-0 (15.g4 Be6+-) 15...Nbd7 16.Qc2 b6 17.Nce4 d5?? (better 17...Ne4 18.Ne4 d5 19.cd5 Rc8+/-) 18.Nf6 Bf6 (18...Nf6 19.Qf5 a4 20.Qd3+-) 19.Qf5 dc4 20.Bc4 (20.Nc4 Re8+-) 20...Nc5 (20...g6 21.Qc2+-) 21.Rfd1 (21.Ba3!? Qd7 22.Qd7 Nd7 23.Bf8 Rf8+-) 21...g6 22.Qf3 (22.dc5 gf5 23.Nb3 Qe7 (worse 23...Bb2 24.Rd8 Rfd8 25.Ra2 Rd1 26.Bf1=) 24.Bf6 Qf6 25.cb6 Qb6-/+) 22...Nd7 23.Ne4 Bg7 (23...Be7 24.d5 Bb4 25.Qf4+-) 24.Bd5 (24.Ba3 Nf6 25.Bf8 Kf8+-) 24...Rc8 (24...Rb8 25.Ba3 Nf6 26.Bf8 Nd5 27.Bd6+-) 25.Bc6 (25.Ba3 Nf6 26.Bf8 Kf8 27.Nf6 Bf6+-) 25...Nf6 (25...Nb8 26.Bb7 Rc7 27.Bd5+-) 26.d5 (26.Ba3 Ne4 27.Qe4 Kh8+-) 26...Nh5 (26...Ne4 27.Bg7 Kg7 28.Qe4+-) 27.Bg7 Ng7 (27...Kg7 28.d6+-) 28.Nf6 Kh8 29.e4 Qe7 (29...Rb8 30.d6+-) 30.d6 Qe5 (30...Qd8 31.e5+-) 31.Nd7 Qb2 32.Nb6 (32.Rab1 Qc2 33.Nf8 Rf8+-) 32...Rcd8 (32...Rc6 33.bc6 Qb6 34.c7+-) 33.Nc4 (better 33.Nd7 Rd7 34.Bd7 Nh5+-) 33...Qb4 34.Na5 (better 34.Rdc1 Ne6+-) 34...Ne6 (34...Rd6 35.Rd6 Qd6+-) 35.Nb7 Nd4 36.Qf6 Kg8 37.Qd4 Qd4 38.Rd4 1-0. abrak (2130) - Xykko (1765), Rated Blitz tournament, lichess.org, 2017.

4.e3 Nd7 5.c4 Ngf6 6.Nf3 h6 7.Be2 g6 8.0-0 Bg7 9.h3 g5 10.d4 g4 11.Nh2 (better 11.hg4!? Ng4 12.Nc3=) 11...gh3-/+ 12.gh3 Nb6 13.Ng4 (13.de5 de5 14.Ba3 Qe6-+) 13...Ng4 14.Bg4 Rg8 15.Kh2 (15.Bc8!? Rc8 (worse 15...Nc8 16.Kh2-/+) 16.Nd2 ed4-+) 15...Nc4 (better 15...Bg4 16.Qg4 Nc4 17.Qe4 Nb2 18.Qb7-+) 16.Bc3? (16.Bc8 Rc8 17.Bc3 ed4 18.ed4 Qe4-+) 16...Bd7 (better 16...Bg4 17.Qg4 ed4-+) 17.Bd7 Kd7 (17...Qd7 18.Qb3 ed4 19.Bd4-+) 18.d5-/+ Rad8?? (better 18...f5 19.Nd2 Nb6-+) 19.Qg4+- f5 20.Qc4 e4 21.Bg7?? (better 21.Na3+-) 21…Qg7 (21...Qg7 22.Qc7 Kc7 23.Rc1 Kb6 24.Rc6 bc6 25.bc6 Qg2) 0-1. kasperoff (1850) - checa4 (1860), Daily SuperBlitz Arena, lichess.org, 2020.

4.e4 Bd7 5.a4 Nf6 6.Bd3 (6.Nc3 a6+=) 6...g6 (6...Bg4 7.Be2 Bc8 8.Nc3=) 7.Ba3 Bg7 8.Nc3 0-0 9.h3 (9.Nf3 Be6=) 9...Qe8 (9...Be6 10.Nf3=+) 10.Nf3= c6?? (10...a6 11.0-0=) 11.g4?? (better 11.Bd6 h6 12.Bc4+- (12.Be5?! Ne4 13.Be4 Be5 14.Ne5 Qe5+/-; 12.Ne5?! Ne4 13.Ne4 Be5+-)) 11...c5 12.Ne2 (12.Bc4 Be6 13.Qe2 Nbd7=) 12...a6 13.c4 ab5 14.cb5 (14.ab5 Be6=) 14...b6 15.Nh2 (15.g5 Nh5=+) 15...d5 16.ed5 Nd5 17.Be4 Be6 18.Ng3 Nd7 19.h4 (19.Bb2!?-/+) 19...N7f6-+ 20.h5 Ne4 21.Ne4 Nf6 (21...Nf4 22.hg6 fg6 23.Qc2-+) 22.h6? (better 22.Nc5!? Bd5 23.Rf1 bc5 24.Bc5-/+) 22...Bh6?? (better 22...Ne4 23.hg7 Kg7-+) 23.Nf6+- (23.Nf6 Kg7 24.Ne8 Rfe8 25.Bb2+-) 1-0. mitkosto - Dmitriilvov (1655), Rated Blitz game, lichess.org, 2015.

4.e4 Nf6 5.d3 Bd7 (5...a6 6.a4=+) 6.c4 c6 (6...a6 7.Nc3=+) 7.bc6 (7.Nc3 cb5 8.cb5 d5 9.ed5 Bg4=) 7...Nc6 8.Ba3 Qd8 9.Be2 Qb6 10.Nf3 Nd4 (10...Qa5!? 11.Nfd2 Nd4=) 11.Nd4+= Qd4 12.Nd2 Ba4?? (better is 12...Qc3 13.Qc1 Qc1 14.Rc1 Bc6+=) 13.Qa4+– (13...b5 14.Qb5 Nd7 15.Nb3+–) 1–0. pinecrest1981 – amstel, Live Game Caissa's Web, 2004.

4.c4 Nf6 5.a4 Qc5 (5...e4 6.e3=) 6.e3 d6?? (6...Qe7!?=) 7.Be2 (better 7.d4 ed4 8.ed4 Qb4 9.Bc3+-) 7...a6 8.d4 ed4 9.Bd4 Qb4 10.Bc3 Qc5 11.Bd4 Qb4 12.Bc3 Qc5 13.Nf3 ab5 14.ab5 Ra1 15.Ba1 Be7 16.0-0 0-0 17.Bd4 Qb4 18.Nc3 Nbd7 (18...Qa5 19.Qd3+/-) 19.Na2 (better 19.Qa1!? d5 20.Nd5 Nd5 21.cd5+-) 19...Qa3+= 20.Qc2 Nc5 21.Ra1 Qb3 22.Qd2 (22.Qc1 Rd8 23.Nc3+-) 22...Nfe4= 23.Qc1 Be6 24.Rb1?? (better 24.Bb2 Nd3 25.Bd3 Qd3 26.Nd4 Qc4 27.Ne6 Qe6 28.Qc7=) 24...Qa2-+ 25.Bc5 (25.Rb2 Qa5-+) 25...Nc5 (better 25...Qe2 26.Rb2 Qc4 27.Qc4 Bc4-+) 26.Ra1 (26.Nd4 Bf6 27.Ra1 Nb3 28.Ra2 Nc1 29.Ne6 Na2 30.Nf8 Kf8-+) 26...Qb3 (better 26...Qe2 27.Nd4 Qc4 28.Qd1-+) 27.Bd1? (27.Nd4 Qb4 28.Ne6 Ne6 29.Bf3-+) 27...Qc4 28.Qb2 (28.Nd4 Qc1 29.Rc1 Kf7-+) 28...Bf6 29.Qa3 (29.Nd4-+) 29...Ba1 30.Qa1 Nb3 (30...Qb5 31.Bc2-+) 31.Qb2 (31.Bb3 Qb3 32.Nd4 Qa2-+) 31...Qc1 (31...Ra8!? 32.Be2 Qc5 33.g3-+) 32.Qc1 Nc1 33.Nd4 Bd7 (33...Bd5 34.Bc2 f4 35.g3-+) 34.f3 (34.Bf3 Ra8 35.h4 Ra7-+) 34...Nd3 (34...f4 35.Kf2-+) 35.Kf1 Nc5 36.Ke2 Ra8 37.Kf2 (37.Kd2 Kf7-+) 37...Ra2 38.Kg3 (38.Be2-+) 38...Nd3 (better 38...f4 39.Kf4 Rg2 40.Bb3 Nb3 41.Nb3 g5 42.Ke4 Bb5-+) 39.Bb3-/+ Kf8 40.Ba2 g6 41.e4 (41.Bd5 Nc5-/+) 41...fe4 42.fe4 Ne5 43.Bd5 (43.Ne6 Be6 44.Be6 c6-/+) 43...c6-+ 44.bc6 bc6 45.Be6 Be6 46.Ne6 Ke7 47.Nc7? (47.Nd4 c5 48.Nb5 g5-+) 47...c5 (better 47...Kd7 48.Na6 c5-+) 48.Nd5 Ke6 49.Kf4 c4 (49...Nd3 50.Kf3-+) 50.g3 (50.Ke3 Ng4 51.Kd4 Nh2 52.Nf4 Kd7 53.Kc4 Ng4=+) 50...Nd3 (50...Kd7 51.Ke3-/+) 51.Ke3 Ne5 52.Nf4 (52.Kf4 Kd7 53.Ke3-/+) 52...Kd7-/+ 53.Nd5 Kc6 54.h3 (54.Kd4 Kb5-/+) 54...Kc5-+ 55.Nc3 Kb4 56.Kd2 Kb3 57.Nd5 (57.Nb5-+) 57...Nf3 58.Ke3 c3?? (better 58...Ng1 59.h4 c3-+) 59.Nc3= (59.Kf3?? c2 60.Ne3 c1Q-+) 59...Kc3 60.Kf3 Kd4 61.Kf4 h6 62.g4?? (better 62.h4=+) 62...g5-+ 63.Kf5 Ke3 64.e5 de5 65.Ke5 Kf3 66.Kf5 Kg3 67.Kg6 Kh3 68.Kh6 Kg4 69.Kg6 Kf4 70.Kf6 g4 71.Ke6 g3 72.Kd7 g2 73.Kc7 g1Q 74.Kc6 Qe1 (74...Qe1 75.Kd7 Qc3 76.Ke6 Qc6 77.Kf7 Kf5 78.Ke7 Qc7 79.Ke8 Ke6 80.Kf8 Qf7) 0-1. Antares_Sco (1915) - chrissan (1960), Hourly SuperBlitz Arena, lichess.org, 2016.

4.e3 d6 5.c4 Nd7 6.Nc3 Ndf6 (6...Ngf6 7.Nf3=) 7.Nf3 e4 (7...a6 8.ba6 Ra6 9.c5+=) 8.Nd4+= Qf7 9.d3 ed3 (9...Be7 10.Be2+=) 10.Bd3 Nh6 11.Qc2 Will f5 fall? 11...Nfg4 12.0-0-0 (12.Nd5!? Ne5 13.b6 cb6 14.Rd1+/–) 12...Ne5= 13.Nd5 c6 14.bc6 (14.Nf4 Bd7=) 14...bc6 15.Nf4 Be7 (15...Rb8 16.Be2=) 16.Be2 0-0 17.Nf3 Neg4 18.Bd3 g5 (18...Bf6 19.c5 Bb2 20.Qb2=) 19.h3 (19.Nh3 Qg6=) 19...Ne5= 20.Be5? (20.c5 gf4 (worse is 20...Nd3 21.Nd3 Qe6 22.cd6 Qd6 23.Nf4+/–) 21.Be5 de5+=) 20...de5 21.c5 ef4 22.Bc4 Be6 23.Ne5 Qf6 24.Nd7 Qf7 25.Ne5 Qf6 ½–½. Schueppen,Heinz – Ziese,Gerhard, BdF, 1985.

4.e3 d6 5.Bd3 Nf6 6.Ne2 g6 7.Ng3 Bg7 8.0-0 0-0 9.c4 (9.f4 e4 10.Be2 Be6=+) 9...Nbd7 10.Qb3 (10.Nc3 Nb6=+) 10...Nc5-/+ 11.Qc2 Bd7 12.a4 a5 13.Be2 f4 14.Nh1 g5 (14...Bf5 15.d3=+) 15.d4 ed4 16.ed4 Ne6 (16...Bf5 17.Qd1 Nb3=) 17.Nd2 (better 17.Re1!?=) 17...Nd4-/+ 18.Bd4 (18.Bd4 Qe2 Discovered attack) 18...Qe2 19.Bf6 (19.Rae1 Qg4=+) 19...Bf6 (19...Rf6 20.Rae1 Bf5 21.Qa2-+) 20.Rae1 Qh5 (20...Qg4 21.Qd3 Kh8 22.Qd5-/+) 21.Ne4 (21.c5 d5-/+) 21...Bg7 (21...Be5 22.f3-/+) 22.Re2 (22.c5 f3 23.Qb3 Kh8 24.cd6 fg2 25.Kg2 Be5-/+) 22...Rae8 23.Rfe1 Qg6 (23...Re5 24.c5 f3 25.Nhg3-/+) 24.f3 g4 25.Rf2?? (better 25.fg4 Qg4 26.Nhf2-/+) 25...Bf5 (25...gf3 26.Rf3 Bf5 27.Nhf2-+) 26.Qd2 (26.Kf1 Bd4-+) 26...Kh8 (better 26...gf3 27.Nc3 Bd4 28.g3 Re1 29.Qe1-+) 27.Nc3 Re1 28.Qe1 Bd4 29.fg4 Bg4 (29...Bf2?! 30.Nf2 Bg4 31.Nd5-+) 30.Qd2 (30.Nd5 Bf3 31.Qf1 c6-+) 30...Be3 (30...Qg7 31.Nd5 Bf3 32.Nf4 Rf4 33.Ng3-+) 31.Qb2 (31.Qe3 fe3 32.Rf8 Kg7-+) 31...Qg7 (31...Bf2?! 32.Nf2 Kg8 33.Nd5-+) 32.Nd1 (32.c5 Bh3 33.Kf1 Bf2 34.Qf2 Qc3 35.gh3 dc5-+) 32...Qb2 (better 32...Bd1 33.Qg7 Kg7-+) 33.Nb2 Re8 (33...Be2 34.h3-+) 34.h3 Bf5 (better 34...Be2-+) 35.Kh2 (35.Kf1 Bf2 36.Nf2-+) 35...Bf2 36.Nf2 Re2 37.Nbd1 Bc2 38.Kg1 Bd1 39.Nd1 (39.Kf1 Rf2! 40.Kf2 Ba4-+) 39...Re1 40.Kf2 Rd1 41.Kf3 Rc1 (41...Rd4 42.h4-+) 42.Kf4 Rc4 43.Kf5 Ra4 44.g4 (44.g3-+) 44...Rb4 45.h4 Rb5 46.Kf6 a4 47.g5 a3 48.h5 White prepares g6 48...a2 49.g6 (49.Kf7 a1Q 50.Ke7 Re5 51.Kd8 Qa4 52.Kc8 Qc6 53.Kb8 Re8 54.Ka7 Qb6) 49...a1Q 50.Kf7 (50.Ke7 Qg7 51.Kd8 Rf5 52.Kc8 c5 53.Kb8 b5 54.h6 Rf8) 50...hg6 (50...Qg7 51.Ke8 Ra5 52.h6 Ra8) 51.hg6 (51.Ke7 Re5 52.Kd7 Qa6 53.Kd8 Qc6 54.hg6 Re8) 51...Qg7 52.Ke6 (52.Ke8 Ra5 53.Kd8 Ra8) 52…Re5 0-1. Puresond (1895) - Pterodactyl (2200), Rated Blitz game, lichess.org, 2014.

4.e4 Qb4 5.Be5 Qe4 6.Qe2 =.

4.e4 d6? 5.ef5 Bf5 6.Qf3! Ziese.

4.e4 Nh6 5.Nf3 d6 6.d3 (6.ef5 Bf5 7.Bc4 c6=) 6...Nd7 7.Nc3 Nf6 8.Be2 g6 (8...Be6 9.ef5 Nf5 10.Ng5=) 9.0-0 Bg7 10.Qd2 (10.Nd5 Nd5 11.ed5 0-0=) 10...0-0= 11.Ng5 Nf7 12.Nf7 Rf7 13.a4 f4 (13...fe4 14.de4 Bg4 15.Bg4 Ng4 16.h3=) 14.a5 c5 15.bc6 (15.Rfb1 Be6+=) 15...bc6= 16.Ba3 Ne8 (16...Rb8 17.Rfb1 Rb7 18.Rb7 Bb7 19.Rb1+=) 17.Rab1 Qd8 18.Na4 Nc7 19.Bb2 (19.Qc3 Qd7+=) 19...Ne6 20.Bc3 f3 (20...Nd4!?=) 21.Bf3+= Rf3 (21...Nd4 22.Bd4 ed4 23.Rfe1+=) 22.gf3+/– Qh4 0–1. Trigance,Eric – Ziese,Gerhard, corr SOK–92–81, 1992.

4.Nf3 d6 5.e3 a6 6.a4 Bd7 (6...ab5 7.Bb5 Bd7 8.Nc3+=) 7.Bc4 (7.Nc3!? Nf6 8.Bc4+–) 7...ab5+= 8.ab5 Ra1 9.Ba1 Nf6 (9...Be6 10.Qe2+=) 10.0-0 c6 11.Nc3 d5 12.Be2 (12.Ba2 Qd6+–) 12...e4 13.bc6 (13.Nd4 Qb4+=) 13...bc6 (13...Nc6 14.Ng5+=) 14.Nd4 g6 (14...Qd8!?+=) 15.Qb1+– Qd8 16.f3 (16.Qb3 Be7+–) 16...Bg7 (16...ef3 17.Nf3 Bd6 18.g3+=) 17.Qb4 (17.fe4!? fe4 18.Bb2 0-0+–) 17...Bf8+– 18.Qb3 c5?? (better 18...ef3 19.Nf3 Bd6+–) 19.Nd5+– Nd5 (19...Be7 20.Nb5 Kf8 21.fe4+–) 20.Qd5 cd4 21.Bd4 Bg7 (21...Qe7 22.Bh8 ef3+–) 22.Bg7 Rf8 (22...Qb6 23.Bh8 Be6 24.Qa8+–) 23.Qe5 Qe7 24.Qb8 Kf7 25.Bf8 Qf8 26.Bc4 Be6 27.Be6 Kg7 28.Qf8 Kf8 29.fe4 Ke7 30.ef5 gf5 31.Bg8 h5 32.Rf5 h4 33.Rh5 h3 34.gh3 Kf8 (34...Kf6 35.h4 Kg6 36.Rg5 Kf6 37.Bc4 Ke7 38.Rg6 Kd7 39.h5 Ke7 40.h6 Kd7 41.h7 Kc7 42.h8Q Kd7 43.Qh7 Kd8 44.Rg8) 35.Bc4 Kg7 (35...Ke7 36.h4 Kd7 37.Rd5 Ke8 38.Rd6 Ke7 39.Ra6 Kd7 40.h5 Ke7 41.h6 Kd7 42.h7 Kc7 43.h8Q Kb7 44.Qg7 Kb8 45.Kf2 Kc8 46.Ra8) 36.Ra5 Kf6 (36...Kf8 37.Ra7 Ke8 38.h4 Kd8 39.h5 Kc8 40.Rg7 Kd8 41.h6 Ke8 42.h7 Kf8 43.h8Q) 37.h4 Ke7 38.Ra6 Kd7 (38...Kd8 39.h5 Kd7 40.h6 Kc8 41.h7 Kb8 42.h8Q Kb7 43.Qg7 Kb8 44.Kf2 Kc8 45.Ra8) 39.h5 Kc7 (39...Kc8 40.h6 Kc7 41.h7 Kb7 42.h8Q Kc7 43.Be6 Kb7 44.Qc8) 40.h6 Kb7 (40...Kd7 41.h7 Kc7 42.h8Q Kb7 43.Qg7 Kb8 44.Kf2 Kc8 45.Ra8) 41.h7 Kb8 (41...Kc8 42.Ra7 Kb8 43.Rg7 Kc8 44.h8Q) 42.h8Q Kc7 (42...Kb7 43.Qg7 Kb8 44.Kf2 Kc8 45.Ra8) 43.Qg7 (43.Be6 Kb7 44.Qc8) 43...Kb8 44.Kf2 Kc8 45.Ra8 1–0. DEFFM – GuestVQSW, freechess.org, 2020.

5.Ba3 d6 6.d3 g6 7.c4 Bg7 8.Qa4 b6 (8...Nbd7 9.Nc3+=) 9.Nf3 Bb7 Black is in command 10.Bb2 Nbd7 11.Qb4 (11.Be2 a6+=) 11...0-0 12.Qc3 Nc5 Black prepares the advance e4 13.Be2 Na4 14.Qb3 Nb2 15.Qb2 e4 16.de4 Ne4 17.Nd4 Nf2 18.Kf2 Rae8 19.Qc3 f4 20.Re1? (20.Rd1 Qe4 21.Bf3 Qe3 22.Kf1 Bf3 23.gf3 Bd4 24.Rd4 (24.Qd4 Qf3 25.Qf2 Qd1 26.Kg2 Re2–+) 24...Qe2 25.Kg1+=) 20...fe3 (worse is 20...Qe3 21.Qe3 fe3 22.Kg1 Bd4 23.Na3–+) 21.Kg1 Qh4 Do you see the mate threat? (21...Qh4 22.Nf3 Qf2 23.Kh1 Rf3 24.Bf3 Bf3–+) 0–1. Rosner,Dirk – Ziese,Gerhard, corr SOK–89–37, 1989.

5.Ba3 d6 6.Nf3 e4 7.Nd4 Ng4=.

5.c4 d6 6.Nf3 g6 7.Nc3 Bg7 8.Be2 0-0 9.Qb3 (9.d4 e4 10.Nd2 a6=) 9...Kh8 (9...e4 10.Nd4=) 10.Ng5 (10.d4 e4 11.Nd2 a6+=) 10...h6 11.h4 (11.Nf3!?=) 11...Nbd7 (better 11...hg5!? 12.hg5 Nh7-+) 12.Nf3=+ Nc5 13.Qc2 Bd7 (13...e4 14.Nd4=+) 14.d4 (14.h5 Nh5 15.Nd5 Qf7+=) 14...ed4 15.Nd4 a6 16.Bf3 (16.Rd1 Nfe4=) 16...ab5 17.Ndb5 c6 18.Nd4 Nfe4 19.h5 (19.Nce2 Kh7=+) 19...g5 (19...Nc3 A) 20.Qc3? Na4 21.Nc6 Bc6 (21...Bc3? 22.Bc3 Qg7 23.Bg7 Kg7 24.Ne7+-; 21...Nb2?! 22.Ne7 Bc3 23.Ke2-/+) 22.Qg7 Qg7 23.Bg7 Kg7-+; B) 20.Bc3 f4 B1) 21.Qg6 Ra3 (21...fe3?! 22.0-0-/+) 22.Qh6 Bh6 23.Nc6 Qg7 (23...Rc3?! 24.Ne7 Re8 25.Nd5-/+) 24.Bg7 Bg7-+ (worse 24...Kg7 25.Nb4-+); B2) 21.hg6=) 20.Be4 (better 20.Nb3!?=+) 20...fe4-+ 21.Nb3?? (better 21.0-0-+) 21...Nd3 22.Kd1 (22.Kf1 Rf2 23.Qf2-+) 22...Nf2 (better 22...Rf2 23.Qf2 Nf2 24.Kc2 Nh1 25.Rh1 Qe5-+) 23.Kd2 Nh1 24.Rh1 Rf2 25.Ne2 Bg4 26.Re1 Be5 27.Bc3 Qf6 28.Nbd4 c5 29.Nb3 (29.Nb5-+) 29...Bc3 (better 29...Be2!? 30.Kc1 Bc3 31.a3-+) 30.Qc3 Ra2 (better 30...Re2 31.Re2 Ra2 32.Qc2 Rc2 33.Kc2 Be2 34.Nc1-+) 31.Kc1 Rae2 (better 31...Qc3 32.Nc3 Rac2 33.Kb1 Rc3 34.Nc1-+) 32.Qf6 Rf6 33.Re2 Be2 34.Na5 (34.Nd2 Bd3 35.g4 Rf3-+) 34...Bd3 35.Kd2 Rf2 36.Kc3 Rg2 37.Nb7 g4 38.Nd6 g3 39.Nf7 Kg7 40.Ne5 Ra2 41.Ng4 (41.Kb3 g2 42.Ka2 g1Q 43.Nd3 ed3 44.e4 Qh2 45.Ka3 d2 46.e5 Qe5 47.Ka4 d1Q 48.Ka5 Qb3 49.Ka6 Qa1) 41...g2 42.Nf2 (42.Nh6 g1Q 43.Nf5 Kf6 44.Nd6 Qc1 45.Kb3 Qb2) 42...Rf2 43.Kb3 g1Q 44.Ka4 Rb2 (44...Rb2 45.Ka5 Qa1; 44...Qb1 45.Ka5 Ra2) 0-1. carlos78 (2235) - Pterodactyl (2110), Rated Classical game, lichess.org, 2015.

5.c4 g6 6.Nf3 d6 7.d4 ed4 8.Bd4 Bg7 9.Be2 0-0 10.0-0 Ne4 11.Bd3 (11.Bg7 Qg7 12.Nd4 Nd7=) 11...a6 (11...Nd7 12.Nbd2=) 12.Bg7 Qg7 13.Nbd2 Nc5 14.Bc2 (14.Nb3 Nbd7+=) 14...ab5= 15.cb5 Be6 16.a4 Nbd7 17.Nd4 Bd5 18.a5 (18.N2b3 Qf7 19.Nc5 Nc5=) 18...f4 19.Qe2 fe3 20.fe3 (20.Qe3? Rae8 21.Qc3 Rf4–+) 20...Rf1 21.Nf1 Qe5 22.Bb1 Ne6 23.Qd2 Ndc5 24.Ba2 Ne4 25.Qb2 Ba2 26.Ra2 N6c5 27.Ra3 Qf6 28.Qa2 White prepares the advance a6 28...Qf7 29.Qe2 Qd7 (29...d5 30.a6+=) 30.a6 (30.Nd2 d5=) 30...ba6+= 31.ba6 d5 32.a7 c6 33.Qa2 Qc7 34.h3 Qb6 35.Ra5 Nc3 36.Qa1 Nb5 (36...N5e4 37.Ra6 Qc7 38.Nd2= (worse is 38.Rc6 Ne2 39.Ne2 Qc6–/+)) 37.Nb5= Nb3 38.Qf6 Na5 (worse is 38...Qa5 39.Qc6 Ra7 40.Na7 Qa7 41.Qd5 Qf7 42.e4+/–) 39.Qe6 Kg7 40.Qe7 Kh8 41.Nc7 Qa7 42.Qf6 Kg8 43.Qe6 Kf8 44.Na8 Qa8 45.Qf6 Kg8 46.Qe6 Kg7 47.Qe7 Kg8 48.Qe6 ½–½. Zylla,Johannes – Trigance,Eric, corr ICCF TT–4–90–SF1, 1992.

5.d4 e4 6.c4 d6 7.Ne2 Be6 (7...a6 8.d5=) 8.Nf4 Bf7 9.h4 (9.Nc3 Nbd7+=) 9...g6 (9...Nbd7 10.d5=) 10.d5 (10.Nc3 Nbd7=) 10...Nbd7 11.Nd2 Rg8 (11...0-0-0 12.a4=) 12.Nb3 Bg7 13.Nd4 Nc5 14.h5 Nfd7 (14...Qd7 15.hg6 hg6 16.Qd2=+) 15.hg6= hg6 16.g4 (better is 16.a4!?=) 16...fg4=+ 17.Qg4 Ne5 18.Qg2 (18.Qd1!?–/+) 18...g5–+ 19.Nf5 Qf6 20.Ng7 Qg7 (20...Rg7 21.Rh8 Ke7 22.Ra8 gf4 23.Qg7 Qg7–+) 21.Nh5?? (better is 21.0-0-0–/+) 21...Bh5 22.Rh5 Ned3 23.Bd3 Qb2 24.Rd1 Nd3 25.Kf1 (25.Rd3 ed3 26.Qe4 Kd8 27.Qd3 Qa1 28.Qd1 Qc3 29.Qd2 Qc4–+) 25…0-0-0 (26.f3 Rdf8 27.Qb2 Rf3 28.Kg1 Nb2–+) 0–1. Wartig,Wolfgang – Ziese,Gerhard, corr SOK–89–48, 1989.

5.Nf3 e4 6.Nd4 d5 7.c4 Qb4 8.Ba3 Qa5 9.Bf8 Kf8 10.Nc3 c6 11.Be2 Qb4 12.cd5 cd5 13.Rb1 Qd6 14.0-0. COMP.

5.Nf3 e4 6.Nd4 d5 7.c4 Qb4 (7...c5 8.bc6 Nc6 9.cd5 Nd5 10.Nc3=) 8.Qc2 (8.Ba3 Qa5 9.Bf8 Kf8+=) 8...Bd7 (8...Qd6 9.d3+=) 9.Nc3 (9.cd5 Nd5 10.g4 Qe7 (10...fg4?? 11.Ba3 Qa5 12.Qe4 Kd8 13.Qd5+–) 11.gf5 c5+/–) 9...c6 (9...dc4 10.a3 Qc5 11.Na4=) 10.Be2 (10.bc6!? bc6 11.cd5 cd5 12.Bb5+/–) 10...dc4= 11.a3 Qc5 12.Na4 Qd5 (12...Qe7!? 13.Bc4 Ng4=) 13.Bc4+/– Qd6 14.Qb3 (14.d3 cb5 15.Nb5 Qc6 16.Bf6 gf6+/–). Psion – Psion, 4 Min/Zug, 1991.

4.a4 g6 5.e3 Bg7 6.c4 d6 7.Nf3 0-0 8.Nc3 c6 9.Be2 Bd7 (9...e4 10.Nd4=) 10.0-0 Re8 11.Re1 Bf5 12.d3 Nbd7 13.e4 Be6 14.Qc2 Rac8 15.Rad1 Nc5 16.d4 Ncd7 17.de5 de5 18.g3 (18.Ng5 Red8+=) 18...Nc5 (18...Qc5 19.Nd2=) 19.Ng5 (19.bc6!? bc6 20.Ne5 Nfe4 21.Ne4+=) 19...Nfd7 20.Ne6 Qe6 21.Bf1 f5 (21...Red8 22.Bc1=) 22.ef5 gf5 23.bc6 bc6 24.Bg2 (24.f3!? Rb8 25.Ne2=) 24...e4=+ 25.Ne2? (better 25.g4=+) 25...Bb2-+ 26.Qb2 Nd3 27.Qc3 Ne1 28.Re1 Qe5 (28...Ne5 29.Nd4 Qf6 30.Ne2-+) 29.Qc1 Nc5 30.Nf4 (30.Rd1 Qf6-+) 30...Rcd8 31.Nh5 Nd3 32.Qg5 Kh8 33.Re3 (33.Rd1 Rg8 34.Qd2 Qb2-+) 33...Rg8 34.Qh6 (34.Qf6 Qf6 35.Nf6-+) 34...Rg6 (better 34...Rd6 35.Nf6 Rf6 36.Qh4-+) 35.Rd3 ed3 (35...Rh6?? 36.Rd8 Qe8 37.Re8) 36.Qe3 (36.Qd2 Rg4 37.c5-+) 36...Qe3 (better 36...Qa1 37.Bf1 d2-+) 37.fe3 d2 38.Bf3 d1Q 39.Bd1 Rd1 40.Kg2 Rgd6 41.Nf4 R6d2 42.Kh3 Rh1 43.Kh4 h6 (43...Rdh2 44.Kg5 Re1 45.Kf6-+) 44.Kh5 Kh7 45.h4 (45.h3 Re1 46.Kh4 Rc2-+) 45...Ra2 (better 45...Rg1 46.e4-+) 46.g4 (46.c5 Rg1 47.Ne6 Rg3 48.Nf8 Kg8 49.Kh6 Kf8 50.h5 Rg8 51.Kh7 Rag2 52.h6 Rd2 53.e4 Rd7) 46...fg4 (better 46...Rah2 47.Ng6 fg4 48.Kg4 Kg6 49.h5 Rh5 50.Kf3-+) 47.Kg4 Ra4 48.Kf5 (48.c5 Rc4 49.Kg3 Rc3-+) 48...Rc4 49.Ne6 Rhh4 50.Nf4 (50.Nf8 Kg7 51.Nd7-+) 50...Rhf4! 51.ef4 Rf4! 52.Kf4 a5 53.Ke4 h5 54.Ke3 h4 55.Kf2 a4 56.Kg2 a3 57.Kh3 a2 58.Kh4 ½-½. brucepeng (1950) - maksumsadiah (1935), lichess.org, 2020.

4.e3 a6 5.c4 ab5 6.cb5 c6 7.a4 Qb4 (7...d5=+) 8.Ba3?? (8.Be5!? Be7 9.Nf3+/-) 8...Qe4 (better 8...Qa4!? 9.Qc1 Qg4-/+) 9.Bf8 Rf8 10.Nf3 d5 11.Nc3 Qb4 (11...Qf5 12.d4 e4 13.Ne5+=) 12.bc6 (better 12.Ne5!? d4 13.ed4 Qd4 14.Nf3+/-) 12...Nc6= 13.Rb1 Qd6 14.Be2 Ke7 15.0-0 Re8 16.d4 e4 17.Ng5 (better 17.Nd2!?+=) 17...h6=+ 18.Nh3 Bh3 19.gh3 Kf8 (19...Na5 20.Nb5 Qd7 21.Qc1=+) 20.Kh1 (20.Rb7 Na5 21.Rb5 Rec8=) 20...Re6 (20...Re7 21.Rb6=+) 21.Rg1 (21.Rb7 Kg8=) 21...Nh7 (21...Re7 22.Qf1=+) 22.Nb5 (22.Rb7 Nf6+=) 22...Qd7 (better 22...Qd8!?=+) 23.Bg4+/- Qd8 (23...Ng5!?+/-) 24.Be6 fe6 25.Qg4 (25.Nc3 Qe7+/-) 25...Qe7 26.Ra1 (26.Nd6 Nd8+/-) 26...Ng5+= 27.Qf4 Kg8 28.Rg2 Nf3 (28...e5 29.de5 Rf8 30.Qg3+=) 29.Nc3 (29.Qh6! e5 30.Rb1 ed4 31.Nd6+-) 29...Nb4 30.Ne2 (better 30.Qh6! Nd3 31.Rf1+=) 30...Nd3-/+ 31.Qg4 Rc8 (31...Nh4 32.Nf4 Ng2 33.Kg2 Nf4 34.Qf4-/+) 32.Ng1?? (32.Nf4 Nf4 33.Qf4 g5+=) 32...Nde1?? (better 32...Rf8-/+) 33.Rg3 (33.Nf3 Ng2 34.Kg2 ef3 35.Qf3 Ra8+=) 33...Rc2 (33...Nd3 34.Rg2 Nfe1 35.Ra2-/+) 34.Nf3+= Nf3 35.Rg2 (35.Rf3 ef3 36.Qf3 b6+=) 35...Qc7 36.Qe6 Kh8 37.Qe8 Kh7 38.Qg6 Kg8 (38...Kh8 39.Qg3 Rc1 40.Rg1 Ng1 41.Qc7 Rc7 42.Kg1+/-) 39.a5 (better 39.Rf1+/-) 39...Rc1= 40.Rg1?? (better 40.Rc1 Qc1 41.Rg1 Ng1 42.Qg1=) 40...Rg1 (40...Qh2) 41.Rg1 (41.Qg1 Ng1 42.Kg1-+) 41...Ng1 (41...Qh2) 42.Qg1 (42.Kg1 Qa5 43.Qe6 Kh7 44.Qf5 Kh8 45.Qc8 Kh7 46.Qb7 Qd2+=) 42...Qf7 (better 42...Qa5!? 43.Qg4 Qc7-/+) 43.Qf1 Qf3 44.Kg1 g5 45.a6 ba6 46.Qa6 Kg7 47.Qb7 Kg6 0-1. brucepeng (1985) - Phare (2010), lichess.org, 2020.

4.e3 d5 5.Nf3 Bg4 6.h3 Bh5 (6...Bf3 7.Qf3 Nbd7 8.Nc3=) 7.Be2 (7.g4!? e4 8.gh5 ef3 9.Qf3+=) 7...Nbd7=+ 8.0-0 (8.Nc3 Nb6=+) 8...h6 (8...Bf3 9.Bf3 Qb4 10.Nc3 Qb2 11.a3=+) 9.d3 g5 (9...Bf3 10.Bf3 Qb4=+) 10.Nh2 (better 10.Ne5 Be2 11.Nd7 Bd1 12.Nf6 Kd8 13.Nd5=+) 10...Bg7?? (better 10...Qb4 11.Bh5 Qb2-/+) 11.Bh5+- Nh5 (11...Qb4 12.Bc3 Qb5 13.Be2+-) 12.Qh5 (12.Ba3 Qe6 13.Qh5 Nf6+-) 12...Nf6 (12...Qb4 13.Bc3 Qb5 14.Ng4+-) 13.Qe2 0-0-0 14.Nd2 h5 15.f4 (15.c4 dc4 16.Nc4 e4 17.de4 Qe4+-) 15...g4? (better 15...ef4 16.Rae1 Rhe8+-) 16.Be5 (better 16.fe5 Nd7 17.hg4 Be5 18.Be5 Qe5+-) 16...g3 (16...gh3 17.gh3 Rhg8+-) 17.Nb3 (better 17.Nhf3+-) 17...gh2+/- 18.Kh2 Ne8 (18...Ng4!? 19.Kh1 Ne5 20.fe5 Be5+/-) 19.Bg7+- Ng7 20.a4 f5 (20...Rhe8 21.Rae1+-) 21.Nd4 Qd7 (21...Rhe8 22.Rfe1+-) 22.Rfb1 (22.a5 Rh6+-) 22...Rh6 (22...Ne6 23.Nf3+-) 23.a5 Rg6 24.b6! a6 (24...ab6 25.ab6 Combination; 24...cb6 25.ab6 Combination) 25.bc7 Qc7 26.Qd2 Rdd6 (26...Rg8 27.Ra2+-) 27.Qb4 Rd7 28.Nf5! 1-0. Abdullaevich (1855) - excubitor (1805), lichess.org, 2020.

4.e3 g6 5.Nf3 d6 6.Be2 Bg7 7.0-0 Bg4 8.c4 Nbd7 9.h3 Be6 10.d4 ed4 11.Nd4 0-0 12.Nd2 Rfe8 13.Qb3 Nc5 14.Qc3 Nce4 (14...Na4 15.Qc2 Nb2 16.Qb2=+) 15.Ne4= Ne4 16.Qd3 Rad8?? (better 16...Nc5 17.Qc2 Bd7=) 17.Qe4+- Qg5 18.Ne6 Re6 19.Qc2 Rde8 (19...Bb2 20.Qb2 a6 21.ba6 ba6 22.Qa3+-) 20.Bg7 Kg7 21.Qc3 Kg8 22.Bg4 Re5 (22...R6e7 23.Bf3 Qc5 24.Qd4+- (worse 24.Bb7 Re3 25.Qf6 R3e6+-)) 23.Rfe1 (better 23.f4 Re3 24.Qe3 Qb5 (24...Re3?? 25.fg5 a6 26.Rae1 Re1 27.Re1+-) 25.Qa7 Qc4 26.Qb7 c5+-) 23...Re4 (23...Rc5 24.Red1+-) 24.Bf3 R4e5 (24...Rh4 25.Bb7 Rh3 26.Qa5+-) 25.Bb7 f5 (25...Rc5+-) 26.f4 Qg3 27.fe5 de5 28.c5 (better 28.Qa5 Re7 29.a4+-) 28...e4 (28...Re7+-) 29.Bd5 Kf8 (29...Re6 30.Be6 Kf8 31.Qf6 Ke8 32.Qf7 Kd8 33.Qd7) 30.Qh8 (30.Qf6) 30...Ke7 31.Qh7 (31.Qg7 Kd8 32.Bc6 Qe1 33.Re1 Re7 34.Qf8 Re8 35.Qe8) 31...Kf6+- 32.Qf7 Kg5 Black prepares the advance f4 33.Qe8 Kh4 34.Qh8 Kg5 35.Rad1 f4 36.ef4 Qf4 37.Re4 Qf5 (37...Qe4 38.Be4 Kf4 39.Qf6 Ke4 40.Rd4 Ke3 41.Qe5) 38.Qh4 1-0. kasperoff (1845) - orefrench (1825), Hourly SuperBlitz Arena, lichess.org, 2021.

4.Nf3 d6 5.a4 Be6 (5...Bg4 6.h3 Bf3 7.ef3=) 6.e3 Nbd7 7.c4 (7.a5 a6=) 7...g6 8.Nc3 Bg7 9.Be2 Nc5 10.d4 ed4 11.Nd4 0-0 12.0-0 Rfe8 13.Re1 Rad8 14.Qc2 d5 (14...a5!?=) 15.cd5+= Nd5 16.Bf3 (16.Ba3 Nc3 17.Qc3 b6+/-) 16...Nc3 (16...Nb4 17.Qe2 Nbd3-/+ (17...Bd4?! 18.ed4 Nb3 19.d5=)) 17.Bc3+= Bc8? (better 17...Qg5!?+=) 18.Bb4+- Bd4?? (better 18...b6 19.Nc6 Qh4 20.Bc5 Ba1 21.Ra1 bc5 22.Nd8 Rd8 23.Qc5 Rd2+-) 19.ed4 Nd3 (19...Bf5 20.Qc5 Qc5 21.Bc5 b6+-) 20.Re7 (20.Qd3?! Qb4 21.Re3 Kg7+=) 20...Nb4 21.Re8 (21.Qc7 Be6+-) 21...Re8 22.Qc7 1-0. brucepeng (1940) - lukirtv (1835), lichess.org, 2020.

4.Nf3 e4 5.Nd4 c5 6.bc6 dc6 =.

5.d4 ed4 6.Qd4 (6.Nf3 a6+=) 6...Ne4 (6...Bf5 7.c3–/+) 7.c4 (7.Nc3 Nc3 8.Qc3 Bf5+=) 7...Bd7 (7...Bf5 8.f3 Nf6 9.e4+=) 8.f3 (8.Nc3 Nc3 9.Qc3 Bf5+=) 8...Nf6 (8...Nc5 9.e4+=) 9.e4 Be6 (9...a6 10.Bb2=) 10.e5 (10.Ne2 c5 11.Qc3 a6=) 10...de5 (10...Bf5 11.f4+=) 11.Qe5+= Qd8 (11...c5 12.bc6 Nc6 13.Be7 Ne5 14.Bf6 gf6 15.Nd2+=) 12.Bf8 Rf8 13.Nh3 (13.Nc3 Nbd7 14.Qe3 Qe7+=) 13...Qe7 (13...Nbd7 14.Qe3+=) 14.Ng5 (14.Nf4 Nbd7 15.Qc7 Bc4 16.Kf2 Be6=) 14...a6 (14...Nbd7 15.Qc7 Bc4 16.Kf2–+) 15.Ne6= Nbd7?? (better is 15...Qe6 16.Qe6 fe6=) 16.Nc7+– Kd8 17.Qe7 Ke7 18.Na8 Ra8 19.Nc3 ab5 20.cb5 Rc8 (20...Ne5 21.Rc1+–) 21.Kd2 Rc5 (21...Ne5 22.Re1 Kd6 23.f4 Nc4 24.Bc4 Rc4 25.Rhf1+–) 22.Bd3 Ne5 (22...Kd6 23.Be4 b6 24.Rad1+–) 23.Rhe1 Kf8 24.a4 Nd3 25.Kd3 Nd5 26.Nd5 Rd5 27.Kc4 Rd8 28.Rad1 Rc8 29.Kb4 g5 30.Rd7 b6 31.Rb7 g4 (31...Rd8 32.Rb6 Rd2 33.Rb8 Kg7 34.Rg1+–) 32.fg4 (32.Ree7 f5 33.Rh7 Kg8+–) 32...Kg8 (32...Rc2 33.Rb6 Rg2 34.h3+–) 33.Re2 Rc1 34.Rb6 Rb1 35.Kc5 (35.Ka5 Rh1+–) 35...Rh1 (35...Ra1 36.Ra6+–) 36.g3 (better is 36.a5!? Rh2 37.a6 Rh1 38.Rb8 Kg7+–) 36...Rc1 37.Kd6 Rd1 38.Ke5 (better is 38.Ke7!? Rd4+–) 38...Ra1 39.Ra6 Kg7 40.g5 Rb1 41.Re3 Rb4 42.h4 Rb1 43.h5 Rh1 44.g4 h6 45.Rh6 f6 46.Rf6 Rh4 47.Kf5 (47.Ref3 Rh5 48.gh5 Kh7 49.Rf8 Kg7 50.R3f7) 47...Kh7 48.Re7 Kg8 49.Kg6 Rh3 (49...Rh5 50.Re8) 50.Re8 1–0. nay (2190) – ajeffries (1645), net–chess.com, 2006.

5.d4 Bd7 6.e3 –/+.

5.e3 Bd7 6.c4 c6 7.Bb2 cb5 8.cb5= a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Qe6 12.Nf3 Be7=+ 13.Ng5 Qd5 14.Nf3 Bb5?? 15.Nc3+– Qc5 16.Bb5 Nbd7 17.d4 ed4 18.ed4 Qc8 19.0-0 0-0 20.Nd5 Nd5= 21.Bd7 Qd7–/+ 22.Qb3 Nf4 23.Qe3 Qg4 24.h3?? Nh3 25.Kh1–+ Nf4 26.Qe7?? Qg2# 0–1. OutOfBounce – ERIC1, Live Game Caissa's Web, 2005.

5.Nf3 a6 =+.

4.a4 Bg7 5.Ba3 d6=+ 6.e4 Nd7 (6...f5 7.Nc3=+) 7.Nc3= c6 (7...Ngf6 8.Nf3=) 8.Qe2 Ngf6 9.bc6 bc6 10.h3 (10.Qd3 Bf8=) 10...a5 11.d3 (11.Qd3 Bf8=) 11...Nh5 12.g3 Nhf6 13.Bg2 Nb6 14.Nf3 g5 (better 14...Rb8!?=) 15.Ng5 Bh6 16.Nf3 Qe6 17.Nh4 Qe7 18.Qf3 Bg5 (18...Rb8 19.Rb1 Qd8 20.Nf5 Bf5 21.Qf5+/-) 19.Nf5 (19.Rb1 Ra6 20.Nf5 Bf5 21.ef5 Nc8+-) 19...Bf5+/- 20.ef5 Nbd5 21.Nd5 cd5 22.c4 e4 (22...Rb8 23.Qe2+/-) 23.de4+- Ne4 (better 23...de4 24.Qc3 Qe5+-) 24.0-0 0-0 (24...Rc8 25.Qd3 0-0 26.Qd5+-) 25.Qd3 (25.Qg4 h5 26.Qh5 Bf6+-) 25...Qf6 (25...Bf6 26.Rae1 Qc7 27.Qd5+-) 26.Be4 (26.Qd5!? Nc3 27.Qd6 Rac8 28.Qf6 Bf6 29.Bf8 Kf8+-) 26...de4 27.Qe4 Rfe8 (27...Bd2 28.Rfd1 Bb4 29.Qg4 Kh8 30.Ra2+-) 28.Qd5 White prepares c5 (better 28.Qg4 Kf8 29.Rad1+-) 28...Re5?? (28...Qh6 29.Kh2+-) 29.Qd6 (better 29.Qa8 Qd8 30.Qd8 Bd8 31.Rab1+-) 29...Qf5 30.Qc6?? (better 30.Rfe1 Bf6 31.Re5 Qe5 32.Qe5 Be5 33.Rd1+-) 30...Rae8 31.Bd6 R5e6 32.c5 (32.Kh2!?+-) 32...Qh3+/- 33.Qg2 (33.Rad1 Bf6+/-) 33...Qf5 34.Rab1 Kg7 35.Rb5 Qg4 (better 35...Bd2!?+=) 36.Ra5+- Re1 37.Re1?? (better 37.Rb5+/-) 37...Re1-/+ 38.Kh2 Qh5 39.Qh3 Rh1! 40.Kg2?? (40.Kh1 Qh3 Deflection) 40...Qh3 41.Kf3 Rf1 (41...Qf5 42.Kg2 Qd5 43.f3 Qd1 44.Be5 Bf6 45.Bf6 Kg6 46.c6 Qf1) 42.Be5 f6 43.Ra7 Kg6 44.Bd4 (44.Re7 Re1 45.Rh7 Qf5 46.Kg2 Qe4 47.f3 Qc2 48.Kh3 Rh1 49.Kg4 f5) 44...Qf5 (44...Re1 45.Rg7 Kg7 46.Bf6 Kf6 47.a5 Qh5 48.g4 Qh3) 45.Kg2-+ Rd1 46.Be3 (46.Re7 Qd5 47.f3 Qd4 48.Re2 Qg1 49.Kh3 Qf1 50.Rg2 Qf3 51.Rg1 Rg1 52.a5 Qg3) 46...Qe4 (46...Be3 47.Rg7 Kg7 48.c6 Qd5 49.Kh3 Qh5 50.Kg2 Qh1) 47.Kh3 (47.f3 Qe3 48.Rg7 Kg7 49.a5 Qd2 50.Kh3 Rh1 51.Kg4 Qd7) 47...Qh1 (47...Rh1) 48.Kg4 f5 (48...Qh5) 0-1. TWW_LONDON (1820) - MF_Nikita (1855), lichess.org, 2021.

4.c4 Bg7 (--> 3.c4 g6 4.b5 Bg7).

5.c4 Nf6 6.Nc3 d6 7.Nf3 0-0 8.Be2 Nbd7 9.0-0 c6 10.a4 a6 11.d4 ed4 12.ed4 ab5 13.ab5 Ra1 14.Qa1 Nb6 15.Qa7 Nbd7 16.Re1 cb5 17.Bd3 Qd8 18.Nb5 Re8 19.Nd6 Re1 20.Ne1 Qe7 21.Nc8 Qe1 22.Bf1 Ne4 23.Ne7 Kh8 24.Qa8 Nf8 25.Qa1 Qf2 26.Kh1 Nd2 27.d5 Qf1 28.Qf1 Nf1 29.Bg7 Kg7 30.c5 Kf6 31.d6 Nd7 32.Nd5 Ke6 33.Nc7 Ke5 34.Na6 Nd2 Normal 0-1. glorij1 - hommer (1705), Rated Blitz game, lichess.org, 2015.

5.Nf3 a6 6.a4 d6 7.c4 Bf5 8.Nc3 Nf6 9.Be2 0-0 10.0-0 Nbd7 11.d4 ed4 12.ed4 Rfe8 13.Re1 Qf8 14.Nh4 Be6 15.d5 Bf5 (15...Bg4!+=) 16.Nf5+/– gf5 17.Bd3 (17.ba6 ba6 18.f3 Rab8+/–) 17...Re1 18.Qe1 Re8 19.Qd2 Nc5 20.Bc2 (20.ba6!? ba6 21.Qc2+=) 20...Nfe4= 21.Ne4 Ne4 (21...Bb2!? 22.Rb1 fe4 23.Rb2 ab5 24.ab5 Ra8=) 22.Bg7 Qg7 23.Qd1 (23.Re1!?+/–) 23...Nc3= 24.Qf3?? (better is 24.Qf1 ab5 25.ab5 Ne2 26.Kh1=) 24...Ne2–+ 25.Kf1 (25.Qe2 Re2 26.Rf1 Rc2 27.a5–+) 25...Qa1 0–1. madik – jtree, gameknot.com, 2008.

5.e3 Qc5 6.d4 ed4 7.Nd4 Qb4 8.Bc3 Bd4 9.ed4 f6 10.Bb4 Time forfeit 1-0. skipperIII - Oldani2016, Rated Blitz game, lichess.org, 2016.

5.e3 f5 6.Be2 e4 7.Nd4 c5 8.bc6 Nc6 9.c3 Nd4 10.cd4 b6 11.0-0 a5 12.Nc3 Nh6 13.Qb3 Rb8 14.Nd5 Qd6 15.Rac1 Bb7 16.Nc7 Ke7 17.Ba3 Qa3 18.Qa3 d6 19.Nb5 Rhd8 20.Rc7 Rd7 21.Rd7 Kd7 22.Qd6 Kc8 23.Qc7 Normal 1-0. xaaron_emir – Pierangelo, Rated Blitz game, lichess.org, 2016.

4.Qc2 Nc6 5.e3 d6 6.Nc3 Bf5?? (better is 6...Nf6–/+) 7.Qf5+= Qb2 8.Rb1 Qa3 9.Rb7 White creates threats along the open b–file 9...Qc1 10.Nd1 Nge7 11.Qf3 Rc8 12.Rb2 (12.Bd3 Qa3 13.Bf5 Nf5 14.Qc6 Kd8+=) 12...g6 (12...f5 13.d3=) 13.Bd3+= Bg7 (13...f5 14.Ne2 Qa1 15.e4=) 14.Ne2+/– Qa1 15.Nec3 Rb8 (15...Qc1!? 16.Be4 Na5+=) 16.Rb8+/– Nb8 17.Qb7 0-0 (17...Kd7 18.c5 Qc1 19.cd6 Kd6 20.0-0+– (20.Qa7?! f5+–)) 18.0-0 (better is 18.Qc7 Nbc6 19.Be4+– (19.Qd6 Rd8 20.Qa3 Rd3–/+)) 18...Nbc6? (better is 18...Qc1 19.Nb1 Nd7+–) 19.Nb2 (19.Qc7?! Rc8 20.Qd6 Rd8+–) 19...Qf1 20.Bf1 (better is 20.Kf1!? Rb8 21.Qc7 Rb2+–) 20...Rb8 21.Qc7 Rb2 22.Qd6 Bf8 (22...Bf8 23.c5 Rc2+–; 22...f5 23.c5 e4 24.Nd5+–). Springer,Uwe – Tejler,A, corr SOK–90–68, 1990.

4.Qc2 d6!?

4.Qc2 Qe7 5.Nf3 d6 6.Nc3 Nf6 7.g3 (7.e4 Bg4–/+) 7...g6 (7...Nc6 8.Nd5 Qd8 9.Bg2–/+) 8.Bg2 Bg7 9.0-0 0-0 10.d4 ed4 11.Nd4 Na6 12.Rad1 Nc5 13.e4 Be6 (13...Re8 14.f3–/+) 14.Nce2 (14.Nd5 Bd5 15.ed5 Rfe8–/+) 14...Bd7 15.Nf4 Ba4 (15...Nce4 16.Rfe1 Rfe8 17.f3–/+) 16.Nb3 Rfe8 (16...Nce4 17.Rfe1 g5 18.Be4 Ne4 19.Re4+–; worse is 16...Nfe4 17.Nd5 Qe6 18.Nc7+/–) 17.Rfe1 Rad8 (17...Nfe4 18.Nd5 Qe6 19.Nc7 Bb3 20.ab3+–) 18.Bf6 Qf6 19.Nd5 Qe5 20.Nc7 Rf8 21.Nd5 b6 22.Rb1 Kh8 (22...Bc6 23.f4 Qe6 24.Qd2+=) 23.Kh1 (23.f4 Qe6=) 23...Qh5 (23...Rc8 24.f4 Qe6 25.Qd1=) 24.Qd2 Rfe8 25.Re3 Qg4 (25...Rc8 26.Rd1=) 26.f4 Qc8 27.Rc1 Bd7 28.Nd4 Bh3 ½–½. Springer,Uwe – Ziese,Gerhard, corr SOK–90–68, 1990.

5.e3 Qc5 =+.

5.e3 Qc6 6.Nc3 +=. Grund.

5.e3 Qd5 6.Nf3 (6.Bc7 Qc6 7.Bf4 Bd6 8.Bd6 Qd6=) 6...Nc6 (6...d6 7.Bd4+=) 7.Nc3 (better is 7.Bc7 Nf6 8.Nc3+=) 7...Qe6?? (7...Qa5 8.Bf4+=) 8.d4?? (8.Nb5 Kd8 9.Nc7+–) 8...Bb4 (better is 8...Ne5 9.Ne5 Bb4–/+) 9.Bg7? (better is 9.Rc1 Nf6 10.a3 Ne5 11.ab4 Nf3 12.Qf3+=) 9...Bc3–+ 10.Nd2 Ba1 (better is 10...Nd4 11.Rc1 Nf3 12.Qf3 Bg7 13.Rc7 Qa2–+) 11.Qa1= Nge7 (11...Nb4 12.Qd1+=) 12.Bh8+= Ng6 13.Bc4?? (13.Bg7 Nh4=) 13...Qg4?? (13...d5 14.e4 dc4+= (14...Nh8?! 15.Bd5 Qf6 16.Bc6 bc6 17.0-0–/+)) 14.0-0 (14.g3 Nh8 15.d5 Nd4=) 14...Nh8 (14...d5 15.Bd5 Nh8 16.Bc6 bc6 17.Qc3+=) 15.d5= Ng6 16.dc6 dc6 (16...bc6 17.Qf6 Qh4 18.Bf7 Kf8 19.Qf5+/–) 17.Qf6 (17.Rb1 a6=) 17...Be6+= 18.h3 (18.Be6 Qe6 19.Qb2 b6=) 18...Qf5 19.Qd4 (19.Qb2!? Rd8 20.Be6 fe6 21.Nf3+=) 19...Rd8–/+ 20.Qc3 (20.Be6 Rd4 21.Bf5 Rd2–/+) 20...Qe5 (20...Qc5 21.Rc1–/+) 21.Qe5 (21.Qc1 Rd2 22.Be6 Qb2 23.Qb2 Rb2–/+) 21...Ne5 22.Be6 fe6 (22...Rd2 23.Bb3–/+) 23.Ne4 (23.Nb3 Ke7–/+) 23...h6 (23...Ke7 24.f4 Nc4 25.Rb1–/+) 24.Rb1 (24.Nc5 Rd2+=) 24...b6 (24...b5 25.f4 Nc4 26.Rb3–/+) 25.Rc1 a5 (25...c5 26.f4 Nd3 27.Rc3–/+) 26.Nf6 (better is 26.f4!? Nd3 27.Rc6=) 26...Kf7 27.Ng4 (27.Ne4 c5–/+) 27...Ng4–+ 28.hg4 c5 29.f4 (29.Kf1 Rd2 30.a3 c6–+) 29...Rd2 (29...Rd3 30.e4–+) 30.a4–/+ Rb2 31.Rd1 (31.Kf1 Rb4 32.Ra1 c4–/+) 31...Ke7 32.Kf1 (32.Rc1–+) 32...Ra2 0–1. gtate (1955) – bvboucher (2050), net–chess.com, 2005.

5.Bc3 Qc4 A) 6.e3 Qg4 7.Nf3 Be7 8.h3 Qg6 9.Nd4 Nf6–/+; B) 6.Nf3 Qg4 7.e3 Be7 8.h3 Qg6 9.Na3 Nf6–/+.

5.Bd4 c5 6.Bc3 Qc4 7.e3 Qg4 8.Ne2 d5 9.Na3 Qd7 –/+.

5.Bd4 Nc6 6.e3 Nd4 7.ed4 d5 8.cd5 Bd6 9.Nc3 Qd4 =+.

5.Bf4 Qc4 6.e3 Qe6 7.Nc3 (7.Nf3 Nf6 8.Nc3 Be7 9.Nd4 Qd7=+) 7...Nf6 (7...Be7 8.d4 Qd7 9.Nf3 Nf6=+) 8.Nf3 (8.Rc1 c6 9.Nf3 d5=+) 8...Be7 9.Rc1 (9.Nd4 Qd7=+) 9...c6 (9...a6=+) 10.d4 0-0 11.Ng5 Qd7 12.Qc2 h6 13.Nf3 Nh5 14.Bg3 1–0. Buss,Michael – Macchiagodena,Maurizio, corr ICCF TT/4/90 Final, 1990.

5.Bg3 Qc4 =+. Grund.

4.a3 (--> 3.a3 d5 4.e3).

4.Ba3 Qd8 5.Bb2 Nd7 6.b5 (6.Nf3 e4 7.Nd4 Ngf6+= (worse is 7...Bb4 8.Ne6 fe6 9.Bg7+/–)) 6...c6 (6...Ngf6 7.c4+=) 7.c4 (7.Nf3 Bd6+=) 7...Ngf6 8.Nf3 (8.d4 Bb4 9.Bc3 Bc3 10.Nc3 0-0=) 8...Bd6 9.Be2 (9.c5 Bc7+=) 9...0-0 (9...dc4 10.Bc4 cb5 11.Bb5+=) 10.d3 (10.cd5 cd5 11.0-0 a6+=) 10...Re8 (10...cb5 11.cb5 Qb6 12.Nc3+=) 11.Nc3 d4 (11...a6 12.bc6 bc6 13.0-0+=) 12.ed4= ed4 13.Nd4 Nc5 14.0-0 (14.bc6!? bc6 15.Rb1= (worse is 15.Nc6 Qb6 16.Nb5 Qc6–/+)) 14...Bh2+= 15.Kh2 Qd4 16.g3 Qd7 17.Rh1 cb5 18.Nb5 a6 The passed pawn on d3 will quickly become a dangerous weapon 19.Nd4 (19.Nc3 b6+=) 19...Na4 20.Qc2 Nb2 21.Qb2 b5 (21...Rd8 22.Nf3=) 22.Bf3= Bb7 23.Bb7 Qb7 24.Rhe1 (24.cb5 Re5 25.f3 ab5+=) 24...Red8 25.cb5 ab5 26.Qb5 (26.a4+=) 26...Ng4 (better is 26...Qa7!? 27.Nc6 Qf2 28.Kh3 Rd6 29.Ne7 Kf8–/+) 27.Kg1+= Qb5 28.Nb5 Rd3 29.Re2 g5 30.a4 (30.Kg2 Ra5 31.Nc7 Nf6+=) 30...h5 (30...Ra5 31.Re4 h5 32.Rd4=) 31.Kg2 (31.a5 Rd5 32.Rb2 Ra6+=) 31...Kg7 (31...Ra5 32.f3 Ne3 33.Kf2 Nd1 34.Ke1=) 32.Raa2 (32.a5 Rd5 33.Rb2 Ra6+=) 32...Kg6 (32...h4 33.Re4 f5 34.Rd4=) 33.Re7 (33.a5 h4 34.gh4 gh4=) 33...h4 34.Rb7 (better is 34.Re4!? Kf5 35.Rd4=) 34...f6 (34...f6 35.a5 Rh8 36.gh4 gh4–/+; 34...hg3 35.f3 Ne5 36.a5–/+) 0–1. Vesson,Eric – Tournaire,Olivier, corr EE7.E.09, 1997.

4.Ba3 Qe6 5.Nf3 =+.

4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 e4 8.c4 dc4 9.Bc4 Qc5 (9...Qg5 10.g3+=) 10.Qb3 Bd7 Exerts pressure on the isolated pawn (better is 10...Qe7=) 11.Bf7 Kd8 12.Bc4 Ne7 13.Bd4 Qh5 14.Ba7 Kc8 15.Nc3 (better is 15.Ne2 Qg4 16.0-0+–) 15...Bh3?? (better is 15...Qg6 16.Nce2 b6+/–) 16.Nh3+– Nd7 17.Nf4 Qg5 (17...Qh6 18.Ne4 Ng6 19.Ne6+–) 18.Ne4 Qe5 (18...Qh4 19.g3 Qh6 20.Be6+–) 19.Qb1 (better is 19.d4 Qe4 20.Bd3 Qf4 21.ef4 b6+–) 19...b6 (19...Ng6 20.Bd4 Qe8+–) 20.d4 Qf5 21.Be6 Qe6 22.Ne6 Nf5 23.Nf8 (better is 23.Qc2 Bb4 24.Ke2 c5 25.dc5 Bc5 26.N4c5 bc5+–) 23...Rf8 24.0-0 Kb7 25.Qa2 (25.Nc5 Nc5 26.dc5 Ng3 27.hg3 Rf6 28.Qe4 c6 29.Qe7 Ka8 30.Qd8 Ka7 31.Qb6 Ka8 32.Ra1) 25...Kc8 26.Ng5 (26.Rc1 Kd8+–) 26...Nd6 27.Ne6 Nb7 28.Nf8 Nf8 29.Qg8 Nd8 30.Qf8 g6 31.Rc1 Kd7 32.Qg7 Kd6 (32...Nf7 33.Qf7 Kd8 34.Rc7 h6 35.Qe7) 33.Qc7 1–0. Hal1958 – Miker, playchess.de, 2002.

4.b5 c5 5.a4 Bf5 6.c4 d4 7.ed4 (7.a5!?=+) 7...ed4-/+ 8.Be2? (better 8.Qe2-/+) 8...d3-+ 9.Nf3 (9.Nc3 Nf6-+) 9...Qe2 10.Qe2 de2 11.Ke2 Nf6 (11...Nd7 12.d4-+) 12.Re1 (12.Bf6 gf6 13.d4 Rg8-+) 12...Kd8 (12...Nbd7 13.Kf1 Kd8 14.Kg1-+) 13.Kf1 (13.Bf6 gf6 14.d4 Bd6-+) 13...Nbd7 (13...Bd3 14.Kg1 Bc4 15.Bf6 gf6 16.d4-+) 14.Nc3 (14.Kg1 Bd6-+) 14...Bd6 (14...Bd3 15.Kg1-+) 15.Nd5 (15.Ne2 Bd3-+) 15...Nd5 16.cd5 Kc7 (better 16...f6!? 17.d4 c4 18.a5-+) 17.Bg7 Rhe8 18.Re3 (18.d4 c4-+) 18...Bf4 (18...Re3 19.fe3 Rg8 20.Bc3-+) 19.Re8 Re8 20.Re1 (20.d4 Bd3 21.Kg1 c4-+) 20...Bd3 21.Kg1 Re1 22.Ne1 Bg6 23.g3 (23.d3 Kd6-+) 23...Bd2 24.Nf3 Bc3 (better 24...Bb4 25.Ne5 Kd6 26.Nd7 Kd7-+) 25.Kg2?? (25.Bc3!? Kd6 26.Kf1-/+) 25...Be4 (25...Bg7 26.Nh4-+) 26.Bh6?? (better 26.Bc3 Kd6 27.g4-/+) 26...Bd4 (better 26...Ne5 27.Kf1 Nf3 28.Bf4 Kd7 29.h4-+) 27.Bf4 Ne5 28.h3 (28.Be5 Be5 29.g4 c4 30.b6 Kb6-+) 28...c4 (better 28...Bf3 29.Kf1 Kd6-+) 29.Be3 (29.Be5 Be5 30.Kf1 Bf3 31.Ke1-+) 29...Bf3 30.Kf1 Be3 31.fe3 c3 32.Kf2 Be4 (32...c2 33.g4 c1Q 34.d6 Kd6 35.Kg3 f6 36.Kf4 Nd3 37.Kg3 Qe3 38.Kh4 Bg2 39.a5 Qh3) 33.g4 c2 34.g5 (34.b6 Kd6 35.Kg3 c1Q 36.Kf4 Qf1 37.Kg5 h6 38.Kh6 Qh3 39.Kg7 Qh7 40.Kf6 Qg6) 34...c1Q 35.Kg3 (35.b6 Kd8 36.ba7 Qd2 37.Kg3 Qg2 38.Kh4 Nf3 39.Kh5 Qg5) 35...Qc3 (35...Qe3 36.Kh4 Ng6 37.Kg4 Qf3) 36.Kf4 (36.d6 Kd6 37.Kf2 Qd2 38.Kg3 Qe1 39.Kf4 Qh4) 36...Nc4 (36...Bd5 37.Kf5 Kd6 38.g6 Qd3 39.Kf4 Qe4 40.Kg3 Qe3 41.Kh4 Qf4 42.Kh5 hg6) 37.Ke4 (37.Kg3 Qe3 38.Kh4 Bf5 39.b6 Kd8 40.g6 Qf4 41.Kh5 hg6) 37...Qe3 38.Kf5 Qg5! 39.Ke4 (39.Kg5 Kd6 Combination) 39...Ne3 (39...Nd6 40.Kf3-+) 40.Kd3 Nd5 41.Ke2 Qh4 (41...Qe3 42.Kd1 Qd3 43.Ke1 Nc3 44.b6 Kd6 45.Kf2 Ne4 46.Ke1 Qe3 47.Kf1 Qf2) 42.Kd2 Qh3 43.Kc2 Qa3 44.Kd2 Qa4 (44...Qe3 45.Kc2 Qe2 46.Kb3 Qd3 47.Kb2 Qd2 48.Kb3 Qc3 49.Ka2 Nb4 50.Kb1 Qc2 51.Ka1 Qc1) 45.Ke2 Qb5 46.Kf3 (46.Kf2 Qd3 47.Kg2 Nf4 48.Kf2 b5 49.Kg1 Qf3 50.Kh2 Qg2) 46...Qb4 (46...Qd3 47.Kf2 Nf4 48.Kg1 Qf3 49.Kh2 Qg2) 47.Kg3 (47.Ke2 Qe4 48.Kd2 Qe3 49.Kc2 Qc3 50.Kd1 Qb2 51.Ke1 Nf4 52.Kd1 h5 53.Ke1 Qe2) 47...a5 (47...Qf4 48.Kg2 Ne3 49.Kg1 Qg3 50.Kh1 Qg2) 48.Kh3 (48.Kf3 Qb3 49.Kf2 Qe3 50.Kg2 Nf4 51.Kf1 Qf3 52.Ke1 Qe2) 48...a4 (48...Qb3 49.Kg2 Nf4 50.Kf2 b5 51.Ke1 Qc2 52.Kf1 Qe2 53.Kg1 Qg2) 49.Kh2 (49.Kg2 Qf4 50.Kg1 Qf3 51.Kh2 Ne3 52.Kg1 Qg2) 49...a3 (49...Qg4 50.Kh1 Ne3 51.Kh2 Qg2) 50.Kh3 (50.Kg3 Qf4 51.Kg2 Ne3 52.Kg1 Qg3 53.Kh1 Qg2) 50...a2 (50...Qf4 51.Kg2 Ne3 52.Kg1 Qg3 53.Kh1 Qg2) 51.Kh2 (51.Kg3 Qf4 52.Kh3 a1Q 53.Kg2 Qaf1) 51...a1Q 52.Kh3 (52.Kg2 Qg4 53.Kf2 Qag1) 52...Qaa3 (52...Qf1 53.Kg3 Qbf4) 53.Kh2 (53.Kg2 Qd2 54.Kf1 Qac1) 53...Qbb2 54.Kg1 Qaa1 0-1. frate_ali (1885) - carlsen89 (2065), Rated Bullet game, lichess.org, 2015.

4.b5 d4 5.Qf3 c6 (5...Nf6 6.ed4 ed4 7.Qe2=) 6.Bd3 (better 6.ed4 ed4 7.Be2=) 6...Bd7 (6...Nf6 7.Qg3= (7.ed4? e4 8.Be4 Qe4 9.Qe4 Ne4-+)) 7.a4 (better 7.ed4 cb5 8.Qb7+/-) 7...c5?? (better 7...Nf6 8.Ba3 e4=) 8.Qb7+- Qd8 (8...Be6 9.Qa8 Qc7 10.Be4+-) 9.Qa8 Be6 (9...Qc7 10.f4!+-) 10.Be4 (10.Qa7 Bd5 11.f3 Nd7+-) 10...f5 (10...Nf6 11.Bb7+-) 11.Bf3 (11.Bb7 Bd6+-) 11...Bd6 (11...Qc7 12.Bc6 Kf7 13.Bb7+-) 12.Qa7 e4 (12...Ne7 13.a5+-) 13.Qg7 d3 (13...ef3 14.Nf3 Qf6 15.Qf6 Nf6 16.ed4 Nbd7+-) 14.Bh5 Bf7 15.Qf7 1-0. javadnia1355 – affa, Rated Classical game, lichess.org, 2014.

4.b5 e4 5.c4 Qb4 (better is 5...dc4!? 6.Bc4 Qg5=) 6.Ba3+/– Qa5 7.Bf8 Kf8 8.cd5 Nf6 9.Nc3 Bg4 (9...Ke8 10.Qc2 Bf5 11.Nge2+/–) 10.Qc2 Qb6 (10...Qb4 11.Rb1 Qc5 12.d4+–) 11.Ne4 (11.Bc4 Bf5+–) 11...Ne4 (better is 11...Nd5!? 12.Bc4 c6+–) 12.Qe4 Bd7 13.a4 Qc5?? (13...Qd6 14.Rb1+–) 14.Nf3 (better is 14.d6 Nc6 15.bc6 Bc6 16.Qe7 Kg8 17.Qc7 Qf5+–) 14...g6 (14...Kg8+–) 15.d6! Qd6 (15...Qd6 16.Qb7 Discovered attack; 15...cd6 16.Qb7 Discovered attack) 16.Qb7 (16.Qb7 Bc6 17.bc6 Qc6 18.Ba6 Qa6 19.Qa8+–) 1–0. Wall,Bill – Guest6027, internet, 2004.

4.b5 Bf5 5.g4 (5.d4 ed4 6.Bd4 c5 7.bc6 Nc6=) 5...Bg6 6.Nc3 Nf6 (6...d4!? 7.ed4 ed4 8.Nce2 Be4+=) 7.g5= Ne4 8.Nd5 Nf2?? (better is 8...Qd8 9.Bc4 c6 10.bc6 Nc6=) 9.Ne7+– (9.Kf2?! Qd8 10.c4 c6 11.bc6 bc6+–) 9...Nd1 10.Ng6 (10.Rd1?! Be4 11.Nf5 Bf5+=) 10...hg6 11.Rd1 Nd7 12.Nf3 f6 (12...e4 13.Ne5+–) 13.Bd3 0-0-0 14.Bg6 Nb6 15.Rg1 Nc4 16.Bc3 Ne3 (16...Nd6+–) 17.de3 Rd1 18.Kd1 Bc5 (18...c6 19.gf6 gf6 20.Bf5 Kc7 21.bc6 bc6 22.Ba5 Kb7 23.Bd8+–) 19.Ke2 a5 (19...a6 20.ba6 ba6 21.h4+–) 20.gf6 gf6 21.Ba5 b6 22.Bf5 Kb7 23.Bc3 Rh5 (23...Ka7 24.Rg7 Kb8 25.h4+–) 24.Be4 Kc8 25.Rg6 Be7 26.Rg8 Kd7 27.Bg6 Rh6 28.Bf5 Kd6 29.Bb4 Kd5 30.Be7 Kc4 31.Rc8 Kb5 32.Rc7 Rh7 33.Bd3 Ka5 34.Ra7 1–0. Fritz 11 – bernhard5, internet, 2014.

4.c4 Qb4 5.Be5 dc4 6.Bc7 =.

4.c4 Nf6 5.cd5= Nd5 6.a3 a5 7.Nc3 (7.b5 Nd7=) 7...Be6 8.Qa4 (8.b5 Nd7=) 8...Qd7 (8...Nd7 9.Nd5 Bd5 10.Nf3=+) 9.b5= Bd6 10.Nf3 (10.Nd5 Bd5 11.e4=) 10...0-0 (10...f6!?=) 11.Nd5+= Bd5 12.Ne5 Qf5 (12...Qe6!? 13.Nc4 Rc8+=) 13.Qd4 Be5 (13...Qe4 14.Qe4 Be4 15.f3+–) 14.Qd5+– Nd7 (14...Re8 15.Be5 Qe5 16.Qe5 Re5 17.d4+–) 15.e4 Qf6 (15...Qe6 16.Qe6 fe6 17.d4+–) 16.d4 (16...Bd6 17.Qb7+–; 16.Qd7 Bb2 17.Ra2 Rfd8=+) 1–0. kofti – S, ChessWorld.net, 2005.

4.e3 Nf6 5.Nf3 e4 6.Nd4 Bd7 7.c4 (7.Nc3+=) 7...Qb4 (7...c5!? 8.Nb3 dc4 9.Bc4 Be6+=) 8.Qc2+– c6 (8...dc4 9.Bc4 a6 10.a4+–) 9.cd5 cd5 10.Be2 Bc5?? (better 10...a6+–) 11.a3+– Qa5 12.Qc5 a6 (12...Na6 13.Qc2 Nc7+–) 13.Nc3 ab5 (13...h5 14.0-0 Nc6 15.Nb3+–) 14.Ncb5 Nc6 15.Nd6 (15.Nd6 Kf8 16.N4b5+–) 1–0. GuestWHVP – GuestTBYY, freechess.org, 2020.

4.h3 Qb4 5.Be5= Qe7 6.Nf3 f6 (6...Nf6 7.Nc3=) 7.Bb2 (7.Bf4 Qd8+=) 7...Bd7 (7...Nd7 8.Nc3 Nb6 9.Rb1=) 8.c4 Bc6 (8...Be6 9.Ba3 c5 10.d4 dc4 11.Bc5+=) 9.Nc3 Qe6 (9...dc4!? 10.Bc4 Nd7+=) 10.Nd4+/– Qd6 (10...Qf7 11.Nc6 bc6+–) 11.d3 (better is 11.cd5!? Bd7 12.Ndb5 Bb5 13.Bb5 c6 14.dc6 Nc6 15.Qh5 Kd8 16.0-0+–) 11...dc4+= 12.dc4 Nd7 13.Be2 (13.Nc6 Qc6 14.Qh5 g6+/–) 13...0-0-0 (13...Bg2 14.Ndb5 Qe5 15.f4 Qe3 16.Nc7 Kd8 17.Na8 Bh1 18.Qa4–+) 14.Bf3 (14.0-0!?+/–) 14...Bf3= 15.Qf3 (15.Nf3 Nb6+=) 15...Ne5+= 16.Qf5 Kb8 (16...Qd7 17.Qc2+=) 17.0-0 Nh6 (better is 17...Nc4 18.Rfb1 Qd7=) 18.Qf4?? (18.Qc2!?=) 18...g5 (better is 18...Nc4!? 19.Qd6 Bd6–+ (19...cd6?! 20.Nd5=; 19...Nd6?! 20.Rfd1+=)) 19.Qe4+= f5?? (19...Nc4 20.Rfd1 Bg7 21.Rab1=) 20.Qd5?? (better is 20.Nf5 Qe6 21.Nd5+–) 20...Qd5 (20...Qe7!? 21.Qb5 Bg7=) 21.cd5+= Bb4 22.Ne6 Rdg8?? (better is 22...Nd3 23.a3 Ba5 24.Nd8 Nb2+=) 23.Nb5+– Rc8?? (23...Bd6 24.f4 gf4 25.ef4 Nd3 26.Bh8 Rh8+–) 24.Be5 Bd6 (24...Rhg8 25.Bc7 Ka8 26.a3+–) 25.Nd6 (25.Bh8 Rh8 26.Nd6 cd6 27.Ng5 b5+–) 25...cd6 26.Bd6 (better is 26.Bh8!? Rh8 27.Ng5 b5+–) 26...Ka8 27.Rfc1 (27.Ng5 Rhd8 28.Bf4 Rd5+–) 27...b6 (27...Nf7 28.Be7 Rhg8 29.Bg5 Ng5 30.Rc8 Rc8 31.Ng5+–) 28.Rc7 (28.Ng5 Rcd8 29.Rc6 Rd7+–) 28...g4 (28...Rc7 29.Bc7 Nf7 30.f3+–) 29.Rac1 a5 (29...Rc7 30.Rc7 gh3 31.gh3 b5+–) 30.Rc8 Rc8 31.Rc8 Ka7 32.Rc7 Ka6 33.Rh7 Ng8 34.Nc7 Kb7 35.Nb5 Ka6 (35...Kc8 36.Rh8 Kb7 37.Rg8 Ka6 38.a4 gh3 39.gh3 Kb7 40.Nd4 Ka6 41.Ra8 Kb7 42.Rb8 Ka6 43.Bc7 f4 44.Rb6 Ka7 45.Nc6 Ka8 46.Rb8) 36.a4 1–0. gtate (1965) – cedp, net–chess.com, 2005.

4.h3 Nd7!? =+.

5.a4 a6 6.c4 ab5 7.ab5 Ra1 8.Ba1 Nf6 9.Nf3 Qa3?? (9...e4 10.Ne5=) 10.Nc3 (better 10.Na3 Ba3 11.bc6 Nc6 12.cd5 Nd5 13.Qb3+-) 10...Bg4= 11.Be2 Bf3 12.Bf3 e4 (12...dc4!? 13.0-0 Bd6=) 13.Be2+= Bb4 14.0-0 0-0 15.Qc2 Nbd7 16.Bb2 Qa8 17.Ra1 Qc8 18.Na2 Bd6 19.cd5 cd5 20.Rc1 Qc2 21.Rc2 b6 (21...Ra8 22.Nc3=) 22.Rc6 Bc5 23.Nc1 Rd8 (23...Ra8 24.d3+=) 24.Nb3 Nb8 25.Rc7 Nbd7 (25...Bd6!? 26.Rb7 Nfd7+=) 26.Bf6+/- gf6 27.Bg4 Ne5 28.Bf5 (28.Nc5 bc5 29.Bf5 Ra8+/-) 28...Ra8 (28...Bb4!?+=) 29.Rc8+/- Rc8 30.Bc8 Kf8 31.Bf5 (31.Nc5 bc5 32.Bb7 f5 33.Bd5 Ke7+-) 31...h6 (31...Bb4 32.Bh7 Ng6 33.Kf1+/-) 32.Kf1 (32.Nc5 bc5 33.b6 Ke7+=) 32...Ke7 33.Ke2 Kd6 34.d3 (better 34.d4 ed3 35.Bd3+/-) 34...Nd3=+ 35.Nd4?? (35.f3 ef3 36.gf3=+ (36.Kd3?? fg2 37.Nc5 bc5-+; worse 36.Kf3 Ne5 37.Kf4 Ng6 38.Bg6 fg6-/+)) 35...Bd4 36.ed4 Nc1?? (better 36...Nf4 37.Kd2 Ng2-+) 37.Ke3 Nb3 38.f3 Na5 39.fe4 de4 (better 39...Nc4 40.Kd3 Na3=) 40.Be4+/- Nc4 41.Kf4 (41.Kd3 f5 42.Bc6 Na5+-) 41...Na3 42.Kf5 (42.Bc6 Nc2 43.d5 Nd4+/-) 42...Ke7?? (42...Nb5 43.Kf6 Nd4 44.Kf7 Ke5=) 43.Kg4?? (better 43.Bc6+/-) 43...Nb5-/+ 44.d5 Nd6 (better 44...Nc3 45.Bd3 Nd5-/+) 45.Kh5?? (better 45.Bd3=+) 45...Ne4-+ 46.Kh6 (46.Kg4 Kd6-+) 46...Nc3 (46...b5 47.Kg7 b4 48.Kh6-+) 47.Kh5 (47.d6 Kd6 48.h4 Ne4-+) 47...Nd5 (better 47...b5 48.Kg4 b4-+) 48.Kg4 b5 49.h4 (49.Kf3-+) 49...b4 50.h5 Kf8 51.h6 Kg8 52.Kf5 b3 53.g4 b2 54.g5 b1Q 55.Kg4 fg5 (55...Qg1 56.Kf3 Qe3 57.Kg4 f5 58.Kh4 Qf2 59.Kh5 Nf4) 56.Kh5 (56.h7 Kh7 57.Kf3 Qd3 58.Kf2 Nf4 59.Kg1 Qf3 60.Kh2 Qg2) 56...Qg6 (56...Qb4 57.h7 Kh7 58.Kg5 Qf4 59.Kh5 Nf6) 57.Kg4 Nf6 (57...Qd3 58.h7 Kh7 59.Kg5 Qg3 60.Kf5 Qf4) 58.Kg3 Qh6 (58...Qd3 59.Kg2 Ne4 60.h7 Kh7 61.Kh1 Qf3 62.Kg1 Qf2 63.Kh1 Ng3) 59.Kf3 (59.Kf2 Ne4 60.Ke2 Qd6 61.Ke3 f5 62.Kf3 Qf4 63.Ke2 Qd2 64.Kf1 Qf2) 59...g4 60.Kg3 (60.Ke2 Qh3 61.Kd2 Ne4 62.Kc2 Qc3 63.Kb1 Nd2 64.Ka2 Qb3 65.Ka1 Qa3) 60...Qg5 (60...Nh5 61.Kg2 Qd2 62.Kf1 g3 63.Kg1 Qf2 64.Kh1 Qf1) 61.Kg2 (61.Kf2 Ne4 62.Kg2 Qd2 63.Kh1 Qe1 64.Kg2 Qf2 65.Kh1 Ng3) 61...Qe3 62.Kh1 (62.Kh2 Qf3 63.Kg1 Ne4 64.Kh2 Qf2 65.Kh1 Ng3) 62...g3 63.Kg2 Qf2 64.Kh3 Qh2 0-1. kasperoff (1870) - small_fish90 (1900), Hourly SuperBlitz Arena, lichess.org, 2020.

5.c4 dc4 6.Bc4 cb5 7.Bb5 Bd7 8.Bd7 Nd7 (worse is 8...Kd7 9.Ba3 Qe8 10.d4 ed4 11.Qd4 Kc8 12.Bf8 Qf8 13.Nd2+/–) 9.Nf3 g6 (9...e4 10.Nd4=) 10.0-0 (10.Ne5!? Ne5 11.Qa4 Qd7 12.Qd7 Kd7 13.Be5+/–) 10...Bg7 11.Ne1 Rc8 12.Nc3 Ngf6 13.Ne2 (13.Nb5!? a6 14.Ba3=) 13...0-0 14.d4 Nd5 (14...Rfd8 15.Qa4+=) 15.de5= Be5 16.Be5 Qe5 17.Nf3 Qe6 18.Ned4 Qd6 19.Rc1 a6 20.Qb3 b5 21.Nd2 Nc5 22.Qb1 Rfe8 23.N2b3 Na4 24.Rc8 Rc8 25.Rc1 Rc1 26.Qc1 Nac3 27.Qb2 Qb4 28.g3 (28.a3 Qc4=) 28...Nd1 29.Qd2 (29.Qe2 N5c3 30.Qd2 h6+=) 29...N5c3 (29...Qd2 30.Nd2 Nb4 31.Ne4–/+) 30.Kg2 Qc4 31.Kg1 Qa4 32.Kg2 (32.Nf5! Qa3 33.Qd8 Qf8 34.Ne7 Kg7 35.Qd4 f6 36.Qd7=) 32...Qa2–/+ 33.Qa2 Na2 34.Nc5 (34.Nc6 Nac3–/+) 34...Nb4 35.e4 Nc3 36.f3 a5 37.e5 (37.Kf2 a4–+) 37...a4 38.Nb5 (38.Kf2 Nbd5–+) 38...Nb5 39.Na4 Nd3 40.f4 Nd4 41.Nc3 Kf8 42.Ne4 Ke7 43.Nf6 h5 44.Kh3 (44.h4 Ke6–+) 44...Nf2 (44...Ne1!? 45.Ne4–+) 45.Kg2 Ng4 46.Nd5 Ke6 47.Nc3 Ne5! 48.Ne4?? (48.fe5 Ke5 Combination) 48...Nef3 49.Nf2 Kf5 50.Nh3 f6 51.Nf2 Ne1 52.Kf1 Nec2 53.Kg2 (53.Nd1 g5 54.fg5 fg5–+) 53...Ne3 54.Kg1 Ne2 55.Kh1 Nf4! 56.gf4 Kf4 0–1. Valpa – Rahim, playchess.de, 2004.

5.a4 Nf6 6.Nf3 e4 7.Nd4 g6 (7...Qd8 8.Be2=) 8.c4 Bg7 9.Qb3 c6 10.bc6 bc6?? (better 10...Nc6 11.cd5 Na5+/-) 11.Qb7+- 0-0 12.Qa8 c5 13.cd5 (better 13.Ba3!? Be6+-) 13...cd4 14.Bd4 (better 14.Ba3 Rc8 15.Qb8 (15.Be7?? Rc1 16.Ke2 d3; 15.Qa7?! Nd5 16.Bc4 Qg5+/-) 15...Rb8 16.Be7 Nd5 17.Bd6+-) 14...Nc6+/- 15.Qb7 (15.dc6 Ra8 16.cd7 Nd7 17.Bg7 Kg7-/+) 15...Nd4 16.ed4 Ng4 17.Qb2?? (better 17.Qa7 e3 18.Be2 ed2 19.Nd2+/-) 17...Qf6-+ 18.d3? (better 18.Ra3 Qf2 19.Kd1 Bd4 20.Qc2-+) 18...ed3 (better 18...Re8 19.Ra2 ed3 20.Kd1 Nf2 21.Qf2 Bg4 22.Kc1 Bh6 23.Nd2 Qf2 24.Be2 Qd4 25.Rb2 Bg7 26.Rb3 Qc5 27.Rc3 Qc3 28.Kd1 Re2 29.Re1 Qd2) 19.h3?? (19.Bd3 Re8 20.Kf1 Ne3 21.Kg1 Ng2 22.Nd2-+) 19...Qe7 (19...Re8 20.Kd1 Nf2 21.Qf2 Qf2 22.Bd3 Bh6 23.Ra2 Qa2 24.Bc2 Ba4 25.Na3 Bc2 26.Nc2 Qb1) 20.Kd2?? (better 20.Kd1 Qh4 21.hg4 Qh1 22.Nd2-+) 20...Nf2 21.Rg1 (21.Bd3 Bh6 22.Kc2 Nd3 23.Qb7-+) 21...Rc8 22.Bd3 (22.g4 Qg5 23.Ke1 Qe3 24.Be2 Rc1 25.Qc1 Qe2) 22…Bh6 0-1. kasperoff (1875) - Madega (1915), Hourly SuperBlitz Arena, lichess.org, 2020.

5.Nf3 f6 6.c4 dc4 7.Bc4 Be6 (7...Qb4 8.Qb3 Qb3 9.ab3=) 8.Qb3 (8.Ba3 Qd7 9.Be6 Qe6 10.Bf8 Kf8+=) 8...Bc4= 9.Qc4 c6 (9...Qb4 10.Qb4 Bb4 11.a3=) 10.Ba3 Qf7 11.Qf7 Kf7 12.Bf8 Kf8 13.Nc3 Ne7 14.0-0-0 Kf7 15.d4 ed4 16.Nd4 c5 17.Nb3 b6 18.Rd2 a6 19.a4 (19.Rhd1 ab5 20.Nb5 Nbc6=) 19...ab5 20.ab5 Ra3 (20...c4!? 21.Nd4 Ra1 22.Nb1 Nd7=+) 21.Kb2 Ra7 22.Rd6 (22.Rhd1 Re8+=) 22...Rb7 (22...Nc8!? 23.Rdd1 Nd7=) 23.Rhd1+= Re8 24.Nd5?? (24.Nd2 Nc8 25.Nc4 Ra7+=) 24...Nd5 (better 24...Nc8!? 25.Rc6 Nc6 26.bc6 Ra7-/+) 25.R1d5= Re6? (25...Re4 26.Kc3=) 26.Rd8 (better 26.Re6!? Ke6 27.Rc5+/-) 26...Ke7 27.Rh8 h6 28.Rg8 Kf7 29.Rdd8 (29.Rgd8 Ree7+=) 29...Nd7= 30.Nd2 Ne5 (30...Ra7 31.Nc4=) 31.Rgf8 (31.f4 Nd7+=) 31...Kg6= 32.Rde8 (32.e4!? Ng4 33.f4=) 32...Re8=+ 33.Re8 Nd3 34.Kc3 Nf2 35.Re6? (35.Nc4 f5=+) 35...Ng4 (35...Kf7 36.Rd6 Ke7 37.Rc6 Nd1 38.Kd3 Rd7 39.Ke2 Nc3 40.Ke1-+) 36.h3? (better 36.Nc4!?=) 36...Ne5 (36...Kf7!? 37.Rc6 Ne3-+) 37.Nc4-/+ Nc4 38.Kc4 Kf7 39.Rd6 Ke7 40.Kd5? (better 40.Rc6=+) 40...Rd7-+ 41.Rd7 Kd7 42.e4 g6 43.g4 h5 44.gh5 gh5 45.h4 Kc7 46.e5 f5 47.e6 Kd8 (47...f4 48.Ke4 Kd6 49.Kf4 Ke6 50.Ke4-+) 48.Ke5 c4 49.Kd4 Ke7 50.Kc4 Ke6 51.Kd4 Kd6 52.Ke3 Ke5 53.Kf3 f4 54.Ke2 Kf5 (better 54...Ke4 55.Kf2 f3-+) 55.Kf3= Ke5 56.Ke2 Ke4 57.Kf2 f3 58.Kf1 Ke3 59.Ke1 f2 (better 59...Kf4 60.Kf2 Kg4 61.Ke3-+) 60.Kf1 Kf3 ½-½. FERNANDO_2013 (1845) - samri1234 (1890), Rated Blitz game, lichess.org, 2020.

5.Nf3 f6 6.c4 dc4 7.Bc4 Be6 8.Qb3 Bc4 9.Qc4 Qf7 10.Qf7 Kf7 11.Nc3 Bd6 12.Ne4 Nd7 13.Nd6 cd6 14.Ba3 d5 15.Rc1 Ne7 (15...a6 16.Rc7 Ke6 17.b6=) 16.Rc7 Rhd8 17.Ke2 Ke6 (17...b6 18.d4 e4 19.Nh4=) 18.Rhc1 Rab8 19.d4 e4 20.Nd2 Ng6 (better 20...Rdc8!?+/-) 21.Nb3+- a6 (21...b6 22.R1c6 Kf5 23.Rd6+- (23.Ra7?! Ra8 24.Rcc7 Ra7 25.Ra7 Ke6+/-)) 22.Nc5 (better 22.Na5!? ab5 23.Nb7+-) 22...Nc5+/- 23.R1c5 (worse 23.dc5 ab5 24.c6 bc6 25.R1c6 Kf5=+) 23...f5? (better 23...ab5!? 24.Bb4 Nf8 25.Rb5 Nd7+/-) 24.Rg7 (24.ba6!? Rd7 25.Rd7 Kd7 26.Rd5 Kc6 27.Rc5 Kb6 28.ab7 Nh4+-) 24...ab5 25.Bb4 (25.Rb5 b6+-) 25...Rd7 (25...Rdc8+-) 26.Rd7 Kd7 27.Rd5 Ke6 28.Rb5 Rc8 29.Rc5 (29.d5!? Ke5 30.d6 Ke6 31.Rb7 Ne5 32.Rh7 Rc2 33.Kd1 Rc8+-) 29...Ra8 (29...Rc5 30.Bc5 (30.dc5?! Ne5+/-) 30...Nh4 31.Kf1+-) 30.a3 f4 (30...Rd8+-) 31.Rc7 fe3 (31...b5 32.Rh7 Rc8 33.Bd2+-) 32.fe3 (32.Ke3 h6+-) 32...Nh4 (32...h5 33.Rb7 h4 34.Rb6 Kf7 35.d5+-) 33.g3 (33.Rb7!? Rg8 34.Re7 Kd5 35.Re5 Kc4+-) 33...Nf3 34.Rh7 Rc8 35.Bc5 b6 36.Rh6 Kf5 37.Rb6 (37.Bb6?! Rc2 38.Kd1 Rc3+-) 37...Ra8 (37...Nh2 38.Rb7 Ng4 39.Rf7 Nf6 40.Rf8 Rf8 41.Bf8+-) 38.Rb7 Ra4 (38...Nh2 39.Rf7 Kg4 40.Re7+-) 39.Rf7 Kg4 40.Rf4 Kh3 41.Re4 (41.Kf2 Ra6 42.Re4 Rf6+-) 41...Nh2 42.Re8 Ng4 (42...Ra6 43.d5 Ra5 44.Rc8+-) 43.Kd3 (better 43.Kf3 Nh2 44.Kf4 Ra6 45.Rh8 Kg2 46.Rh2 Kh2+-) 43...Kg3 44.Rg8 Kf3 45.Rf8 Kg2 (45...Kg3 46.Bd6 Kg2 47.Bb4+-) 46.e4 Nf2 47.Ke3 Nd1 48.Kd2 (48.Kf4 Nb2 49.Rg8 Kf1+-) 48...Nf2 49.e5 Ne4 50.Kd3 Nc5 51.dc5 Ra3 52.Kd4 Ra1 53.Kd5 (53.e6!? Rd1 54.Ke5 Re1 55.Kd6 Rd1 56.Kc7 Re1+-) 53...Rd1 54.Kc6 Re1 55.Re8 Kf3 56.e6 Kf4 (56...Re3 57.e7 Ke2 58.Kd7 Rd3 59.Kc7+-) 57.e7 Kf5 (57...Re6 58.Kb7 Re1+-) 58.Rf8 Kg6 59.e8Q Re8 60.Re8 Kf6 (60...Kg5 61.Kd7 Kh6 62.c6 Kh5 63.c7 Kg6 64.c8Q Kf5 65.Qc5 Kg4 66.Qf2 Kh5 67.Qg3 Kh6 68.Rh8) 61.Re2 Kf7 (61...Kg7 62.Kd5 Kf7 63.c6 Kf6 64.c7 Kg7 65.Rg2 Kf6 66.c8Q Ke7 67.Rg7 Kf6 68.Qf8) 62.Kd6 (62.Kd5 Kg6 63.c6 Kf7 64.c7 Kg7 65.Rg2 Kf6 66.c8Q Ke7 67.Rg7 Kf6 68.Qf8) 62...Kf8 (62...Kg6 63.c6 Kf7 64.c7 Kg6 65.Rg2 Kf5 66.c8Q Kf4 67.Qg4 Ke3 68.Ke5 Kd3 69.Qd4) 63.c6 (63.Re7 Kg8 64.c6 Kf8 65.c7 Kg8 66.c8Q) 63...Kf7 (63...Kg7 64.Rg2 Kf6 65.c7 Kf5 66.c8Q Kf4 67.Qg4 Ke3 68.Ke5 Kd3 69.Qd4) 64.c7 Kf6 (64...Kg6 65.Rg2 Kf5 66.c8Q Kf4 67.Qg4 Ke3 68.Ke5 Kd3 69.Qd4) 65.c8Q Kg5 66.Qf8 Kg4 67.Rg2 Kh3 68.Qg7 (68.Qg7 Kh4 69.Qg4; 68.Qf3 Kh4 69.Qg4) 1-0. FERNANDO_2013 (1805) - whynot16 (1835), Rated Blitz game, lichess.org, 2018.

5.a4 Ngf6 6.Be2 c5 7.Nf3 b6 (7...e4 8.Nh4=+) 8.0-0 Bb7 (8...e4 9.Nh4=) 9.h3 (9.a5+=) 9...d4 (9...e4 10.Nh4=) 10.Nh2 (better 10.ed4 cd4 11.Re1+/-) 10...Qe6=+ 11.Bf3 e4 12.Bg4 (12.ed4 cd4 (worse 12...ef3 13.Re1 Ne4 14.Nf3+=) 13.Re1 0-0-0=+) 12...Ng4 13.Qg4 f5 (better 13...Qd5 14.ed4 Nf6-/+) 14.Qd1? (better 14.Qe2!?-/+) 14...Bd6-+ 15.ed4 cd4 16.Bd4? (16.c3-+) 16...Bh2 17.Kh2 Qd6 18.Kg1 Qd4 19.Qh5 (19.Nc3 0-0-+) 19...g6 20.Qe2 (20.c3 Qd5 21.Qe2-+) 20...Qa1 21.Nc3 (21.Qc4 Qb2-+) 21...Qb2 22.Qc4 Nc5 (better 22...Qc2 23.a5 ba5 24.Qc7-+) 23.Nd5 (23.d4 Nd7 24.Nd1 Qa3-+) 23...0-0 (23...0-0-0 24.Ne3 Rd2 25.g3-+) 24.Ne7 (24.Nb6 Kg7 25.Na8-+) 24...Kg7 25.Nd5 Qe5 (25...Bd5 26.Qd5 Rfd8 27.Qc4 Rd2 28.a5-+) 26.d4 (26.Qc3 Qc3 27.Nc3 a5-+) 26...Qd5 (better 26...ed3 27.Ne3 d2 28.Rd1-+) 27.Qd5 Bd5 28.dc5 bc5 29.Rd1 Rad8 30.c4 Bc4 31.Rd8 Rd8 32.a5 Bb5 (32...Bb5 33.h4 c4 34.h5 c3 35.f3 c2 36.h6 Kh6 37.fe4 c1Q 38.Kh2 Qf4 39.g3 Rd2 40.Kh3 Bf1) 0-1. stefan777wroclaw - Tinu24 (2220), Rated Blitz game, lichess.org, 2016.

5.Be2 Qb4 6.Ba3 Qe4 7.Bf8 Nf8 (< 7...Kf8 8.Nc3 Qg2 9.Bf3=).

5.Be2 Nb6 6.Nf3 (6.Ba3 Qg5 7.Bf8 Kf8=) 6...f6 (6...e4 7.Ne5=+) 7.0-0= Be6 (7...Qf7 8.a4=) 8.a4 (8.d4 e4 9.Nfd2 0-0-0+=) 8...Nc4 9.Bc4 dc4 10.d4 (10.Ba3 Qf7=) 10...e4 (10...cd3!? 11.cd3 Qd7=) 11.Nfd2+– f5 12.Ba3 Qf7 (12...Qf6 13.Bf8 Qf8 14.f3 ef3 15.Qf3+–) 13.Bf8+– Qf8 14.Nc3 (14.f3 ef3 15.Qf3 0-0-0+–) 14...Qd6 (14...0-0-0 15.a5 Nf6 16.Ra4+=) 15.a5 (15.f3 Nh6+=) 15...Nf6 16.a6 b6 17.Ra4 0-0 (17...Ng4!? 18.g3 Bd7 19.Rc4 Qh6=) 18.Nc4+– Bc4 19.Rc4 Qd7 (19...Ng4 20.g3+–) 20.Rc6 White prepares d5 20...Nd5 (20...Rad8 21.Qe2+–) 21.Nd5 Qd5 22.Rc7 (22.Qb1 Qd7+–) 22...Qb5+– 23.d5 (23.Qh5 Qe8 (23...Qa6?? 24.Qg5 Rf7 25.Rf7 Kf7 26.Qf5 Ke8 27.Qe4 Kf7 28.Qf3 Kg6 29.Qa8+–) 24.Qe8 Rfe8+– (24...Rae8? 25.Ra7 Ra8 26.Ra8 Ra8 27.Ra1+–)) 23...Qa6 (23...Rfc8 24.d6 Rc7 25.dc7+–) 24.d6 Rac8 25.Qd5 Kh8 26.d7 Rcd8 27.Qd4 Qa2 (27...f4 28.ef4 Rf4 29.c4+–) 28.Ra1 Qb3?? (better 28...Qf7 29.Raa7 b5+–) 29.cb3 (29.cb3 h5 30.Raa7+–) 1–0. GuestYKFM – PERECVET, freechess.org, 2020.

5.Be2 Ngf6 6.Nf3 Qe6 7.0-0 Bb4 8.Ng5 Qe7 9.a3 Ba5 10.f4 e4 11.c4 Nb6 12.cd5 h6 (12...Nbd5?! 13.Qa4 Bb6 14.Bc4=).

5.Be2 Qg5 6.Bf1 Bb4 7.a3 Bd6 8.Nf3 Qh6 9.d3 Ngf6 10.Nfd2 0-0 11.Be2 Re8 12.0-0 a6 13.a4 Nc5 14.Nf3? (better is 14.Nc3!?–/+).

5.a4 Bf5 6.d3 (6.Nf3 Nbd7=) 6...Qd6 (6...Nbd7 7.Be2=+) 7.Ba3 (7.Nf3 Nbd7=+) 7...c5 8.bc6 Qc6 9.e4? (better 9.Bf8!? Rf8 10.c3=+) 9...Ba3 (9...de4 10.Bf8 Kf8 11.f3 ed3 12.Bd3 Bd3 13.Qd3-+) 10.Na3 (10.Ra3 de4 11.de4 Qe4 (worse 11...Ne4 12.Bb5+-; 11...Be4?! 12.Bb5 Bg2 13.Rg3 Bh1 14.Rg7=+) 12.Re3 Qb4 (12...Qa4?? 13.Re5 Be6 14.Bb5 Qb5 15.Rb5+-; 12...Qc2?? 13.Re5 Be6 14.Qc2+-) 13.Nd2 Nc6-/+) 10...Be6 (better 10...Qc3 11.Ke2 de4-+) 11.d4? (better 11.ed5 Qc3 12.Ke2 Nd5 13.Nb5 Nf4 14.Ke3-/+) 11...Ne4 (better 11...Qc3 12.Ke2 de4-+ (12...Ne4?! 13.Nb5-+; 12...ed4?! 13.Nb5 Bg4 14.Nf3 Ne4 15.Nc3 Nc3 16.Kd2 Nd1 17.Rd1-+)) 12.Bb5+- 0-0 13.Bc6 Nc6 14.Nf3 (14.de5 Ne5 15.Ne2 Rfe8+-) 14...Nc3 (14...ed4 15.Nd4 Rfe8 16.Qd3+-) 15.Qd2 ed4 16.Nd4 Rfe8 (16...Nd4 17.Qc3 Nc6 18.Nb5+-) 17.0-0 (better 17.Qc3 Bd7 18.Kd1 Re4 19.Nc6 bc6+-) 17...Ne4 (17...Nd4 18.Rfe1 Nde2 19.Re2 Ne2 20.Qe2+-) 18.Qd1 (18.Qe3 Nd4 19.Qd4 b6+-) 18...h6 (18...Nc3 19.Qd3 Nd4+-) 19.Nc6 (19.Nab5 Re7+-) 19...bc6 20.c4! Nc3 (20...dc4 21.Qd4 Decoy) 21.Qf3 (21.Qc2 d4+-) 21...Ne4 (21...Na4 22.Nc2 Nb6 23.c5+-) 22.Rfe1 Ng5 (22...Nc5 23.Qe3 Na4 24.c5+-) 23.Qg3 d4 (23...Ne4 24.Qc7+-) 24.Rad1 c5 25.Nb5 (25.h4!? Nh7 26.Nb5 Rf8+-) 25...Bc4 26.Nc7 (better 26.Nd6!? Re1 27.Re1 Be6+-) 26...Re1 27.Re1 Rc8 (27...Rd8 28.f4 Ne6 29.f5+-) 28.h4 (28.Qd6 Bb3+-) 28...Ne6 29.Ne6 Be6 30.Re6! fe6 31.Qg4 (31.Qd6 Kh8+-) 31...Re8 (31...Rc6 32.Qh5 Rc8 33.Qg6+-) 32.h5 (32.Qh5 Rc8+-) 32...e5 (32...Re7 33.Qe4+-) 33.Kh2 (better 33.Qd7 Rb8 34.Qa7 Rc8+-) 33...e4 34.Qf5 e3 35.Qd5 Kh8 (35...Kh7 36.fe3 de3 37.Qd3 Kg8 38.Qc4 Kf8 39.Qc5 Re7 40.Qc8 Kf7 41.Qc4 Kf8 42.Qe2+-) 36.Qd7 Rf8 (36...Re5 37.fe3 de3 38.Qa7+-) 37.Qe7 (better 37.fe3 de3 38.Qe7 Rc8+-) 37…Rf2 (37...Rf2 38.Qc5 Rd2+-) 0-1. gregoire – mariner, Rated Bullet game, lichess.org, 2014.

5.c4 d4 6.ed4 ed4 7.Qe2 Qe2 (7...c5 8.bc6 Nc6 9.Nf3 Qe2 10.Be2=+) 8.Be2 (8.Ne2 Bd6 9.Bd4 Nbd7+=) 8...Bc5 (better 8...c5!?=+) 9.Nf3+/- 0-0 10.Nd4 Bd4 (10...Re8!?+=) 11.Bd4+- Re8 (11...Nbd7 12.Nc3+-) 12.Be3 (12.Bf6 gf6 13.Kd1 Be6+-) 12...Nbd7 (12...a6 13.Nc3+/-) 13.0-0 Ne5 14.d4 Neg4 15.Bg4 Ng4 16.Re1 Bf5 17.Nc3 Bd3 18.c5 Ne3 19.fe3 a6 20.ba6 Ba6 21.e4 Re7 22.e5 Rd8 (22...Kf8 23.Rab1+/-) 23.Rad1 White plans d5 (23.d5 Kf8 24.d6 cd6 25.cd6 Re6+-) 23...Red7 (23...c6 24.Ne4+-) 24.Re4 (24.d5 Bc4 25.d6 Ra8+-) 24...b6? (better 24...Bc4!?+/-) 25.c6+- Re7 26.d5 f6 27.ef6 (27.Ra4 Bc8 28.d6 Re5+-) 27...Re4 28.Ne4 Bc4 (28...gf6 29.Nf6 Kg7 30.Nd7+-) 29.fg7 (29.d6 gf6 30.d7 Bb5+-) 29...Kg7 30.Nc3 b5 31.a3 Ra8 (31...Kf6 32.d6! cd6 33.c7+-) 32.d6 cd6 33.Rd6 Rc8 34.Kf2 Rf8 (34...Kf7 35.Ke3+-) 35.Ke3 Re8 (35...h5 36.Kd4 Ra8 37.Rd7 Kf6 38.c7+-) 36.Kd4 Ra8 37.c7 Rc8 38.Rc6 1-0. fishissushi (1845) - knitghtime (1835), Rated Blitz game, lichess.org, 2020.

5.c4 Bg7 (5...Nf6 6.cd5 Nd5 7.Nf3=) 6.cd5+= Nf6 7.Nf3 (7.Nc3!?+=) 7...Nd5= 8.Bc4 Nb6 9.Be2 Bg4 10.0-0 0-0? (10...a6 11.d4 e4 12.Ba3=) 11.Qb3?? (better 11.Ba3 Qf6 12.Bf8 Kf8 13.Nc3+-) 11...N8d7 12.a4 (12.Ba3 Nc5 13.Qc2 Nbd7=) 12...Be6 (12...Nc5 13.Qb4 e4 14.Bg7 Kg7 15.Rc1=+) 13.Qc2= Bg4? (13...Rfc8 14.a5 Nd5 15.Nc3=) 14.a5 (14.Ba3 Qf6 15.Bf8 Rf8+-) 14...Nc8? (14...e4 15.Bg7 (worse 15.ab6 ef3 16.Bg7 fe2 17.Bf8 ef1R 18.Kf1 Qf8 19.bc7 Nb6-/+) 15...Kg7 16.Nd4 (worse 16.ab6 ef3 17.Qb2 Kg8 18.Bf3 Bf3 19.gf3 Ne5=+) 16...Be2 17.Ne2+=) 15.h3 (15.Ba3 Nd6 16.Qc7 Rfc8 17.Qd6 Qd6 18.Bd6 e4+-) 15...e4 (15...Bf3!? 16.Bf3 Nd6+=) 16.Bg7 Kg7 17.hg4 ef3 18.Bf3 Ne5 19.Bb7 Rb8 20.a6 Nd6 21.Bc6 (21.g5!? Nb7 22.ab7 Rb7+-) 21...Ng4+/- 22.f3 Qe5 (22...Ne5 23.Nc3+/-) 23.Qc3+- (23.fg4?! Qa1 24.Nc3 Qa3=) 23...Qc3 24.Nc3 (worse 24.dc3 Ne3 25.Rf2 Nb5-/+) 24...Ne5 25.Be4 (better 25.Rfb1!?+-) 25...Nb5+= 26.Nb5 Rb5 27.Kf2 (27.d4!? f5 28.Bb7+=) 27...f5 28.Bb7 Rb2 29.Ke2 Rd8 30.Rfd1 Nc4 The pressure on the backward pawn d2 grows 31.f4 (better 31.Rac1 Nd2 32.Rc7 Kf6 33.Ke1=) 31...Nd2-+ 32.Bf3 (32.Rac1 c5! 33.Ke1 Rd3 34.Rc5 Re3 35.Kf2 Re7-/+) 32...Ne4 (better 32...Kf6!?-+) 33.Ke1 Rd1 34.Kd1 (34.Rd1 Nc5-/+) 34...c5 (better 34...Nf2 35.Kc1 Nd3 36.Kd1 c5-/+) 35.Rc1?? (better 35.Be4 fe4 36.Ra5=+) 35...Nf2-+ 36.Ke1 Nd3 37.Kd1 Nc1 38.Kc1 Ra2 39.Bb7 Kf6 40.g3 (40.Kd1 Ke6-+) 40...Ke6 (40...Re2 41.e4 Re4 42.Kd2-+) 41.Kb1 (41.Kd1-+) 41...h6 (better 41...Ra3-+) 42.Ka2+- Kd6 43.Kb3 Kc7 44.Kc4 Kb6 45.Bc8 (45.e4 fe4 46.Be4 g5+-) 45…g5 1-0. fishissushi (1890) - palitogo (1880), Rated Blitz game, lichess.org, 2020.

5.Be2 Bg7 6.d3 Nf6 7.Nd2 a6 8.Ngf3 ab5 9.d4 e4 10.Ne5 Nfd7 11.Bb5 c6 12.Be2 Ne5 13.de5 Be5 14.Be5 Qe5 15.0-0 Nd7 16.f4 Qf6 17.f5 Ne5 18.fg6 hg6 19.Rf6 Bh3 20.gh3 Rh3 21.Qf1 Ng4 22.Qh3 Ne3 23.Qe3 1-0. virtualintrepid - monte44, Rated Bullet game, lichess.org.

4.b5 e4 5.Ne2 Qe6 6.Nf4 Qf5 7.Bf6 Qf6 8.Nc3 Qe5 9.Be2 g5 10.Nfd5 (better is 10.Nh5 Be7 11.Bc4+=) 10...c6–/+ 11.bc6 (11.Bc4 cd5 12.Nd5 h5–/+) 11...bc6 (11...dc6 12.Bg4 Nd7 13.f4 ef3 14.Qf3 cd5 15.d4–+) 12.Ne4 (12.Bc4 cd5 13.Bd5 Nc6–/+) 12...cd5 13.Ng3 Ba6 14.0-0 Be2 15.Qe2 Nc6 16.d4 Qe6 17.Rab1 Be7 18.f4 gf4 19.Rf4 Bg5 20.Rf3 Nd8 (20...Rg8 21.Qd3–+) 21.Nf5 (21.e4 de4 22.Ne4 Kf8–/+) 21...Bf6 22.Rbf1 Rc8 23.Nh6? (better is 23.Rf4!?–/+) 23...Bd4!–+ 24.Nf7? (24.ed4 Qe2 Pinning (24...Qe2 Deflection)) 24...Nf7 25.Rf7 (25.Qd3 Ne5 26.Qd4 Nf3 27.Rf3 Rg8–+) 25...Qe3 26.Qe3 Be3 27.Kh1 Rc2 28.R7f5 d4 29.Ra5 (29.a3 Re2 30.Re5 Kd8–+) 29...Rg8 (better is 29...Ke7!? 30.Ra7 Rf8 31.Rd1–+) 30.g3 Rc7 31.Rb5 Rg5 32.Rb2 Ke7 33.Kg2 Rc6 34.Re1 Rgc5 35.Rb4 (35.Kf3 Re6–+) 35...Rc2 36.Kh3 Kd8 37.Rb8 (37.Ra4–+) 37...Ke7 38.Rb4 Rh6 39.Kg4 Rch2 40.Rd4 Re6 41.Ra4 (41.Rd5–+) 41...h5 42.Kf3 Rf2 0–1. mikebaldini (1695) – ali92 (1665), gameknot.com, 2014.

5.b5 d5 6.Be2=.

5.b5 g6 6.d4 ed4 (6...e4 7.c4=) 7.Bd4 Bg7 8.Nf3 0-0 9.Be2 c5 10.Be5 d5 11.Nc3 (11.0-0 Nbd7 12.Bb2 Re8=) 11...Re8 (11...Bg4 12.Bg3=+) 12.Rb1= Nbd7 13.Bf6 Nf6 14.Nd5 Nd5 15.Qd5 Be6 16.Qg5 Bc3 17.Kf1 a4 (17...Bf6 18.Qf4=) 18.Qe7+= Re7 19.Bd3 (19.b6!?=) 19...Ba2=+ 20.Rd1 Rd8 21.Ke2 Rdd7 (21...Bb2 22.Nd2=) 22.Nd2 Bd5 (22...Bd2 23.Kd2 c4 24.Ra1=) 23.Nb1 (23.Rhg1 b6+=) 23...Ba5 (23...Be5 24.e4 Ba2=) 24.Kf1 (24.f3 c4 25.Be4 Be4 26.fe4 Rc7=) 24...Re8 (24...Ba2!? 25.Rc1 c4–/+) 25.Be2= Red8 (26.f3 Bf3 27.Rd7 Be2 28.Ke2 Rd7=). Woschkat,Karl_Heinz – Krueger,Erich, corr SOK–87–10, 1987.

5.Nf3 e4 6.Nd4 ab4 7.ab4 Ra1 8.Ba1 Qb4 9.Be2 (9.Nb5!? Kd8 10.Bf6 gf6 11.N1c3=) 9...d5–/+ 10.0-0 Bd7 11.c3 (11.f3!?–/+) 11...Qa4 12.Qa4 Ba4 13.Bb2 (13.c4 dc4 14.Bc4 c5–/+) 13...Bc5 (13...c5!? 14.Nf5 Bd7–+) 14.Nf5–/+ 0-0 15.Ba3 Ba3 16.Na3 Nc6 17.Bb5 (17.Rb1 b6–/+) 17...Bb5 18.Nb5 g6 19.Ng3 Rc8 20.h3 Ne5 21.Nd4 Ra8 22.Nge2 c5 23.Nb3 Nd3 24.Ra1 (24.Rb1 b6–+) 24...Ra1 25.Na1 Nd7 26.Nb3 (26.Nf4 Nf4 27.ef4 b5–+) 26...b6 (26...N7e5 27.Kf1–+) 27.Nbc1 (27.f4 b5–+) 27...N7e5 28.Nd3 Nd3 (28...ed3?! 29.Nf4 Nc4 30.Kf1 Nd2 31.Ke1–/+) 29.Kf1 Kf8 30.Ng3 b5 31.Ke2 Ke7 32.f3 f5 33.fe4 fe4 34.Nf1 Kd6 35.Nh2 b4 36.cb4 cb4 37.Kd1 b3 38.Nf1 Kc5 39.Ng3 Ne1!! 40.Kc1 (40.Ke1 b2 Passed pawn) 40...Ng2 41.Kb2 Kc4 42.Ne2 Ne1 43.Nd4 Nd3 44.Kb1 Nf4! 45.h4 (45.ef4 Kd4 Deflection) 45...h5 (45...Ng2 46.Kb2–+) 46.Kb2 (46.Nc6 Nd3 47.Ne7 Ne5–+) 46...Ng2 47.Nb3 Kd3 48.Kc1 Nh4 49.Nc5 Ke2 50.Ne6 Nf3 (better is 50...Ng2!? 51.Nd4 Kf2 52.Ne6–+) 51.Nf4 Ke1 52.Ng6 h4 53.Nf4 Kf2 54.Kd1 Ng5 55.Nd5 (55.Kc2–+) 55...h3 0–1. Hal1958 – GED, playchess.de, 2005.

5.c4 a5 =+.

5.Nf3 Nbd7 6.Nc3 =.

5.Nf3 e4 6.Nd4 a5 7.b5 c5 8.bc6 bc6 9.c4 Qb7 10.Bc3 (10.Qc2 Be7=) 10...Be7 11.cd5 cd5 12.Ra2 0-0 13.Rb2 Qc7 14.Nb5 Qc6 15.d3 Bg4 16.f3 ef3 17.gf3 Bh5 18.Nd4 Qc8 (18...Qd7 19.h4=) 19.Qa4 Re8 20.Rb5 Bc5 21.Ke2 Nbd7 22.Bg2 Qc7 23.Nc2 (23.Kd2 Qe5 24.Re1 Qg5–+) 23...d4–/+ 24.Ba5 Qf4 (25.Kf1 Re3 26.Ne3 Qe3–+; 24...de3?! 25.Bc7 Ra4 26.Bh3=) 0–1. Kamminga,Gosse – Mrkvicka,Josef, corr CZE–NLD, 1999.

5.Nf3 e4 6.Nd4 Bg4 7.Bb5 A) 7...Nbd7 8.Be2 (8.f3 ef3 9.gf3 Be6 10.Rg1 0-0-0 11.Qe2 Nb6 12.Qd3 Nfd7=) 8...Ne5 9.0-0 Be2 10.Qe2 Nc4 11.Bc3 Nd6 12.f3 0-0-0=; B) 7...c6 8.Be2 Be2 9.Qe2 a5 10.ba5 Ra5 11.0-0 Nbd7 12.Nc3 Qe5=.

5.Nf3 e4 6.Nd4 Bg4 7.Be2 Be2 8.Qe2 Nc6 (better is 8...Qd7= 9.0-0 a5 10.b5 Bd6 11.f3 Be5 12.Bc3 0-0=; 8...a5 9.b5 c5 10.bc6 bc6 11.0-0 c5 12.Nb5 Na6+=) 9.Qb5+/– Qd7?? (better is 9...0-0-0 10.Nc6 bc6 11.Qc6 Kb8+– 12.Qb5 Ka8+–) 10.Qb7+– Rb8 11.Qc6 h5 12.Nc3 Qc6 13.Nc6 Rb6 14.Na7 Ng4 (14...h4 15.d3+–) 15.Nd5 Rb7 16.Nc6 Rh6 (16...Kd7 17.Na5 Ra7 18.d3 ed3 19.cd3+–) 17.Na5 Ra7 18.h3 Rd6 (18...Nf6 19.Bf6 gf6 20.Nc3+–) 19.Nc3 Nf6 (19...Nf2 20.Rf1 Rb6 21.Ra2+–) 20.Nb5 (20.Nb5 Rda6 21.Na7 Ra7 22.d3+–) 1–0. pcmvr (2830) – nando (2170), net–chess.com, 2014.

5.Nf3 e4 6.Nd4 Bg4 7.f3 A) 7...Bd7 8.Nc3 (8.Be2 a5 9.b5 c5 10.bc6 Nc6 11.0-0 Rc8 12.fe4 de4=) 8...a5 9.b5 c5 10.bc6 Nc6 11.Ncb5 Rc8 12.Rb1 Nh5=; B) 7...Bh5 8.Nc3 (8.c4 c6 9.cd5 Nd5 10.Nc3 Nc3 11.Bc3 Qh4 12.g3 Qg5=) 8...Nbd7 9.Be2 0-0-0 10.0-0 Ne5 11.fe4 Be2 12.Qe2 de4+=; C) 7...ef3 8.Bb5 (8.gf3 Bd7 9.Nc3 a5 10.b5 a4 11.Bd3 g6 12.Rb1 Bg7=) 8...c6 9.gf3 Bh3 10.Bf1 Nfd7 11.Qe2 Qh4 12.Kd1 Bd6=.

5.Nf3 Nbd7 6.c4 b6 7.cd5 Nd5 8.Nc3 Nb4 9.a3 e4 10.Nd4 Nd3 11.Bd3 ed3 12.0-0 Nc5 13.Qf3 Bb7 14.Nc6 Qd6 15.Nd5 Bc6 16.bc6 0-0-0 17.Qf7 Qd5 18.Qd5 Rd5 19.a4 Rg8 20.a5 Nb3 21.Rad1 Na5 22.Rc1 0-1. manohar1 – charliegrimmett, Rated Blitz game, lichess.org.

5.Nf3 Bg4 6.h3 Bf3 7.Qf3 Nbd7 8.Nc3 (8.d4 e4 9.Qf4 Qd8=+) 8...e4 (8...Qb4 9.Rb1 Qc5 10.Be2=) 9.Qf5 0-0-0 (better is 9...g6!? 10.Qf4 Qb4=) 10.Nd5+/– Nd5 11.Qd5 Nc5 (11...Nb6 12.Qb3+/–) 12.Qc4 (12.Qf5 Qd7 13.Qd7 Kd7+/–) 12...Qd7 (12...f5 13.Rd1+/–) 13.Rd1 f5 14.Bd4 Qd5 (better is 14...Qe7!?+/–) 15.Qd5+– Rd5 16.Bc4 Rd7 17.Bc5 Bc5 18.Be6 (18...Kd8 19.Bd7 Kd7 20.d4+–) 1–0. nordlicht – Knight, mySchach.de, 2003.

4.f4 f6 5.fe5 Qb4 6.Bc3 =.

4.f4 Bg7 5.Nf3 f6 6.Nc3 (6.fe5 Qb4 7.Bc3 Qe7=) 6...c6 7.Be2 (better is 7.fe5!? fe5 8.a3=) 7...ef4–/+ 8.ef4 Qb4 9.Rb1 Qf4 10.0-0 d5 11.Qe1 Qd6 12.Qc1 Ne7 13.Ba3 Qd8 14.Re1 0-0 (14...Bf8!?–/+) 15.Ba6+= Re8 (worse is 15...ba6 16.Be7 Qc7 17.Qa3+=) 16.Bb7 Bb7 17.Rb7 Nf5 18.g4 (18.Bc5 Nd7 19.Ba7 Ne5 20.Ne5 fe5+=) 18...Nh6–/+ 19.h3 Nd7 20.d4 Nb6 21.Bc5 Nc4 22.Re8 Qe8 23.Re7 Qb8 24.Qe1 Nf7 25.Kg2 Bf8 26.Re6 Qf4 27.Bf8 Rf8 28.Ne2 Ne3?? (better is 28...Qb8–/+) 29.Kf2+/– Ng4 30.hg4 Qg4 31.Neg1 (31.Rf6 Kg7 A) 32.Rc6 Ng5 33.Qh1 Rf3 (33...Qf3?! 34.Qf3 Rf3 35.Kg2–/+) 34.Ke1 Re3 35.Rc7 Kh8 36.Rh7 Nh7–+; B) 32.Rf4+/–) 31...Ng5= 32.Re7 (worse is 32.Rc6 Ne4 33.Ke3 Qd7+=) 32...Ne4 33.Ke2 f5 (33...Rf7 34.Rf7 Kf7=) 34.Qh4 (34.Ra7 Re8 35.Kd1 Rb8+=) 34...Qg2 (better is 34...Qh4!? 35.Nh4 Rf7 36.Re8 Kg7–/+) 35.Kd1= h5 36.Qf4?? (better is 36.Qe1=) 36...Qf1–+ 37.Ne1 Qf4 38.Ke2 Qd2 0–1. Caminade,Christian (2180) – Benoit,Michel (2290), FRA–ch Acc Montpellier, 1991.

5.b5 a6 6.a4 (6.d4 d6=) 6...ab5 7.cb5 Nf6 8.Nf3 d6 (8...e4 9.Nd4=+) 9.Be2 0-0 10.0-0 Nbd7 11.h3 (11.a5 c5=) 11...Nc5 12.d4 ed4 13.Bd4 Be6 14.Nbd2 b6 15.Qc2 Bf5 16.Qd1 Ra7 17.Bc5 (17.Bc3 Rfa8 18.Nd4 A) 18...Na4? 19.Nc6 (19.Nf5?! gf5 20.Bd4 Nd5 21.Bg7 Kg7=) 19...Nc3 20.Ne7 (20.Ra7?! Qe8 21.Ra8 Qa8=) 20...Kf8 21.Ra7 (worse 21.Nf5 Ra1 22.Qc2 Ne2 23.Kh2 gf5 24.Qc7 Ne8 25.Qb6 Rf1 26.Nf1 f4=+) 21...Ra7 22.Qe1 (22.Nf5?! Nd1 23.Rd1 gf5=) 22...Ke7 23.Nf3+-; B) 18...Bd7=+) 17...dc5=+ 18.Nc4 (18.Ra3!?=+) 18...Ne4-/+ 19.Ra3 Rd8 (19...Nc3 20.Qe1 Na4 21.Qc1-/+) 20.Rd3 (20.Qc1 Rda8 21.Bd1 Be6=+) 20...Rd3 21.Bd3 Nc3 22.Qc2 Bd3 (22...Ra4 23.Bf5 Rc4 24.Bc8-+) 23.Qd3-/+ Ra4 24.Rc1 Nb5 25.Qb3 (better 25.Nb6!? cb6 26.Qb5-/+) 25...Rb4-+ 26.Qd3 Nd6 27.Ncd2 h5 (27...c6 28.Qa6-+) 28.Qa6 Kh7 29.Qa8 Qe6?? (29...c4!? 30.Nd4 Rb2 31.N2f3-+) 30.Qc6 (better 30.Ng5 Kh6 31.Ne6 fe6 32.Qc6+-) 30...Qe7 31.Nh2?? (31.Qa8 c4 32.Nd4-+) 31...Ne4 32.Ne4 Re4 33.Nf1 Re6 34.Qb7 Qd7 35.Ng3 Qc6 36.Qc8 (36.Qa7 c4-+) 36...Be5 (36...Qe8 37.Qc7 Re3 38.Nf1-+) 37.Ne2 (37.Nf1 c4-+) 37...Qd5 38.Rf1 Rd6 (38...Kg7 39.Qa6-+) 39.Nf4 (39.Qc7 Qe6 40.Qb7 Qd7-+) 39...Bf4 (39...Qb3!? 40.g3-+) 40.ef4 Rd7 0-1. Abdullaevich (1960) - aungphyominarsam (2090), lichess.org, 2019.

5.b5 f5 6.Nf3 d6 7.d3 Be6 8.Be2 Nd7 9.0-0 Ngf6 10.h3 0-0 11.a4 h6 12.Nfd2 g5 13.Bf3 Rab8 14.Na3 b6 (14...g4 15.hg4 Ng4 16.Be2=) 15.Nc2 Qf7 16.Nb4 g4 17.hg4 Ng4 18.Nc6 Rbe8 19.Bg4 fg4 20.Ne4 Qg6 21.Nb4 (better is 21.a5+=) 21...Rf3?? (21...Nc5 22.Nc5 bc5 23.Nc6=) 22.Ng3 (22.gf3 gf3 23.Ng3 h5 24.Qf3 e4 25.Qe4 Qe4 26.Ne4 Bb2+–) 22...Ref8?? (22...Rf7 23.a5=) 23.Nc2 (better is 23.gf3 gf3 24.a5+–) 23...h5 (23...R3f7 24.a5=) 24.Ne1?? (better is 24.gf3!? gf3 25.Kh1+/–) 24...h4 (24...R3f7!?+=) 25.gf3= (25.Nf3 gf3 26.e4 Qg4–+ (worse is 26...hg3 27.fg3 Bg4 28.Qe1–+)) 25...gf3 26.Nf3 (26.Kh2 hg3 27.fg3 e4–+) 26...hg3 27.Kg2 Bg4 28.fg3 Qh5 29.Kf2?? (better is 29.Rf2–+) 29...Rf3 30.Kg1 (30.Qf3 Bf3 31.Ke1–+) 30...Rg3 0–1. Hal1958 – Taroak, playchess.de, 2004.

5.Nf3 d6 6.c5 (6.Be2 Nf6=) 6...a5 (6...dc5 7.bc5 Qc5 8.d4 ed4 9.Bd4 Bd4 10.Nd4=+) 7.Bb5 (7.cd6!? cd6 8.ba5=) 7...c6=+ 8.cd6 Qd6 9.Ba4 ab4 10.0-0 (10.Bb3 Na6-/+) 10...Ne7 (10...Bg4 11.Bb3 f5 12.a3-/+) 11.a3 0-0 12.ab4 Bg4 13.h3 (13.e4!?-/+) 13...Bf3-+ 14.Qf3 (better 14.gf3 Qb4 15.Qc2-+) 14...Nd7?? (better 14...e4 15.Qe4 Bb2-+) 15.Qd1 (15.Nc3!?=+) 15...Qb4-/+ 16.Bb3 Nc5 17.Bf7?? (better 17.Ra3-/+) 17...Kf7-+ 18.Ba3 Qb5 (better 18...Qb3-+) 19.Nc3 Qc4 20.Bc5 Qc5?? (better 20...Ra1 21.Qa1 Qc5 22.Qa2 Nd5=+) 21.Ne4?? (better 21.Qb3 Nd5 22.Ra8 Ra8 23.Qb7 Nc7 24.Qc7 Kg8 25.Rb1+-) 21...Qb6 (better 21...Ra1 22.Qa1 Qd5 23.Ng5 Kg8-+) 22.Rb1 Qc7 (22...Qd8 23.Ng5 Kg8 24.Ne6-+) 23.Qb3? (better 23.Rb7! Qd8 24.Ng5 Kg8 25.Ne6=+) 23...Nd5 24.Nc5? (better 24.Rfc1!? Rfd8 25.Qb7-/+) 24...Ke7 (24...b6 25.e4 bc5 26.ed5-+) 25.e4 (25.Qb7 Rfb8-+) 25...Nf4 (25...b6 26.ed5 bc5 27.d3-+) 26.g3 (26.Qb7 Qb7 27.Rb7 Kd6 28.Rd7 Kc5 29.Rc1 Kb5 30.Rb7 Ka6-+) 26...Ne6?? (26...b6 27.Qb6 Qb6 (27...Nh3?! 28.Kg2 Qb6 29.Rb6-+) 28.Rb6 Nh3 29.Kg2 Ng5 30.Rb7 Kd6-+) 27.Qe6 (27.Qe6 Kd8 28.Nb7 Qb7 29.Rb7 Rf7 30.Qf7 Ra2 31.Qd7) 1-0. fantantric - creativist (1655), Rated Classical game, lichess.org, 2015.

5.a3 d6 6.c4 Be6 7.Be2 Nf6 8.0-0 0-0 9.d4 ed4 10.Bd4 c5 11.Bc3 Rd8 12.Nbd2 Nbd7 13.b5 (13.e4 Re8+=) 13...b6 14.a4 a5 15.Ne1 Nf8 16.Bf3 Ra7 17.Nd3 Ne8 18.Bg7 Ng7 19.Nf4 Qg5 20.Ne4 Qe7 21.Ne6 (21.Nd5 Bd5 22.Qd5 Nd7+/–) 21...Nfe6 (21...fe6!? 22.Ra2 Rad7+=) 22.Nc3 Nc7 23.Nd5 Nd5 24.Qd5 Ne6 25.Rad1 Ng5 26.Rd2 Nf3 27.Qf3 ½–½. Hal1958 – Manolo_vs, playchess.de, 2004.

5.b5 d5 (5...d6 6.Bc4=) 6.d4 (6.c4 d4=) 6...ed4 (6...e4 7.Nfd2=) 7.Nd4 (better 7.Bd4 Nf6 8.c4 dc4 9.Bc4=) 7...c5? (better 7...Nf6=) 8.Nf5!+– Bb2 (8...Bf5 9.Bg7 Discovered attack; 8...gf5 9.Bg7 Discovered attack) 9.Ne7 Ne7 10.Nd2 Ba1 11.Qa1 0-0 12.Qe5 (12.Be2 Re8+–) 12...Re8 13.Qc7 (better 13.Be2+–) 13...Bf5? (13...Nd7!?+–) 14.Qb7 (14.Bd3 Be6 15.Qc5 a6+–) 14...Nd7 15.Bd3 Rab8 (15...Be6 16.Nf3+–) 16.Qc7 Rec8? (16...Be6+–) 17.Qd6 (17.Qa7?! Ra8 18.Qb7 Bg4+–) 17...Bd3 (17...Be6 18.Qe7 Re8 19.Qd6+–) 18.cd3 (18.Qe7?! Bb5 19.Qd6 d4+–) 18...Rb5 (18...Nf8 19.Qe7 Rb5 20.Ke2+–) 19.Qd7 Rcb8 20.Qe7 c4 (20...Rb1 21.Nb1 Rb1 22.Ke2 Rh1 23.Qc5 Rh2 24.Qd5+–) 21.Ke2 c3 22.Nb3 a5 (22...R5b7 23.Qe5 Rc8 24.Rc1+–) 23.Rc1 (23.Qa3 Rc8+–) 23...a4 24.Nd4 Rb2 25.Kf3 Ra2 26.Rc3 Rab2 1–0. GuestRVGX – VelikiBrat, freechess.org, 2018.

5.Be2 b6 (5...d6 6.Nc3=) 6.0-0+= Bb7 7.c4 Qb4 (better is 7...f5 8.Bc3 Bf3 9.Bf3 e4=) 8.Nc3?? (better is 8.Be5 Be5 9.Ne5+=) 8...Qb2–/+ 9.Rb1? (better is 9.a3 Bf3 10.Bf3–/+) 9...Qa3–+ 10.Nb5 Qc5 11.d4 ed4 (better is 11...Qc6 12.Ne1 d6 13.Bf3–+) 12.Nfd4 (12.ed4 Qc6 13.d5 Qc5–+) 12...Ne7 (12...a6 13.Nb3 Qe5–+ (13...ab5?! 14.Nc5 bc5 15.cb5=)) 13.Bf3–/+ Bf3 14.Qf3 d5 15.cd5 Nd5?? (15...Na6 16.d6 Qd5=) 16.Qe4 (better is 16.Rfc1 Qe7 17.Qd5+–) 16...Kf8+/– 17.Rfc1 Nc3?? (better is 17...Qe7 18.Qd5 c6 19.Nc6 Nc6 20.Rc6 Rd8+/–) 18.Rc3+– (worse is 18.Qa8 Bd4 19.ed4 Ne2 20.Kf1 Qh5 21.Rc7 Ng3 22.Kg1 Ne2 23.Kh1 Qf5 24.Rf7 Qf7 25.Qb8 Qe8 26.Qe8 Ke8+–; 18.Nc3?! c6 19.Ncb5 Qe5+/–) 18...Qe7 (18...Qc3 19.Nc3 c6+–) 19.Qe7 (better is 19.Qa8 Bd4 20.Rc7+–) 19...Kg8 (19...Ke7 20.Rc7 Kf6 21.Na7 Kg5 22.Nf3 Kh6 23.Rf7 Na6 24.Rb6 Rab8 25.Rb8 Rb8+–) 20.Rc7 Na6 (20...Nd7 21.Rd7 Rf8 22.Ne6 h6 23.Nf8 Rh7 24.Qf7 Kh8 25.Ng6) 21.Qf7 1–0. gtate (1720) – maf, net–chess.com, 2001. (=1.e3 e5 2.b4 Qe7 3.Bb2 g6)

5.Be2 d6 6.Nc3 =.

4.Ba3 Qe4 5.Qe2 Qc2 (5...Qe2 6.Be2 Ba3 7.Na3–+) 6.Qe5 Be7 (6...Ne7!? 7.Nc3 d6 8.Qe3–+) 7.Nc3 (better is 7.Qg7 Qg6 8.Qh8+=) 7...Nc6?? (better is 7...Qg6 8.Qc7 Nc6 (8...Ba3 9.Qc8 Ke7 10.Nd5 Kd6 11.Qc7 Kd5 12.Bc4 Ke4 13.f3 Kf5 14.Bd3 Kf6 15.Bg6+–) 9.Be7 Nge7–/+ (9...Nce7 10.Nb5 Qe4 11.Ne2+/–; worse is 9...Ke7 10.d4+=)) 8.Qg7+= Ba3 (8...Qg6 9.Qh8 Bf6 10.Bd3 Bh8 11.Bg6 hg6 12.Rb1+=) 9.Qh8 Nce7 10.Nge2 (10.Qd4 Qf5 11.Bd3+/–) 10...Kf8? (10...Bb2 11.Rd1+=) 11.g3 (better is 11.Nd4!? Qg6 12.Ndb5+/–) 11...d5 12.Bg2 (better is 12.Nd4 Qg6 13.Rb1+=) 12...Ng6? (better is 12...Bb2 13.Rd1 Bg4+=) 13.Nd4?? (better is 13.Qh7 c6 14.h4+–) 13...Qd3 (13...Nh8 14.Nc2 Bb2 15.Nd5 Ba1 16.Nc7+/– (16.Na1 c6 17.Nc7 Rb8–/+)) 14.Nde2?? (better is 14.Qh7 Qd4 15.Bd5–/+) 14...Nh8–+ 15.0-0 (15.Nf4 Qd4 16.Nfe2 Qg7 17.Bd5 c6–+) 15...Qd2 (better is 15...c6!? 16.Nf4 Qc2 17.Rad1–+) 16.Rad1 Qg5 17.Rd5 Qe7 18.Rfd1 Bg4 19.f3 (19.R5d2 Nf6–+) 19...Qe3 20.Kf1 Bf3 (20...Bf3 21.R1d3 Bg2 22.Kg2 Qh6–+) 0–1. challl – pauldopson, net–chess.com, 2004.

4.Qc1 Be7 5.Be5 Nc6 6.Bg7 Ne5 7.Bh8 f6 8.a3 Qd6 9.Nc3 Qc6 10.Bg7 Qa6 11.Ba6 Ba3 12.Qa3 1-0. imc80 - kiki97240, Rated Classical game, lichess.org, 2014.

6.Be2 f6 7.Bc7 Na6 8.Bf4 g5 9.Be3 Bd6 (9...Nb4 10.Kd1+=) 10.Ba6 (10.Nc3 Nb4 11.Kd1 Nh6+/–) 10...ba6+= 11.Nc3 Ne7 (11...Rb8 12.Ba7 Rb2 13.Bd4+=) 12.g4 (better is 12.Ne4!? Be5 13.d4+/–) 12...Be5 13.h4 (13.d4 Bc7 14.h4 Bb7=) 13...Bb7 14.f3 Rc8 (14...gh4 15.Rb1 0-0-0=) 15.hg5 (15.Rb1 Bd5 16.hg5 fg5 17.Bg5 Bc3 18.dc3 Ba2+=) 15...Nd5 (15...Rc3 16.Rb1 Rc7 17.gf6 Nc8–/+) 16.g6?? (better is 16.Rb1 Ne3 17.Rb7 Bc3 18.dc3 fg5 19.Ra7 Nc2 20.Kd2+/–) 16...hg6?? (better is 16...Ne3 17.Rb1 Rc7–/+ (worse is 17...Nc2 18.Kd1+=)) 17.Rh8+– Ke7 (17...Kf7 18.Rc8 Bc8 19.Nge2+–) 18.Rc8 Bc8 (18...Ne3 19.de3 Bc8 20.Nd5 Ke6+–) 19.Nd5 Kd6 20.Nc3 a5 (20...Bc3 21.dc3 Kc6 22.Ne2+–) 21.Nge2 Bb7 (21...Bb7 22.d4 Bh2+–). challl – pauldopson, net–chess.com, 2004.

6.Ne2 d6 7.Bb2 Nc6 8.Nd4 (8.Nbc3 Nge7–/+) 8...Bd7 (8...Nd4 9.Bd4 c5 10.Bb2–/+) 9.Nc6 (9.Be2 Nd4 10.Bd4 c5–/+) 9...Bc6 10.Bd3 0-0-0 11.0-0 Nf6 (11...a6 12.Re1–/+) 12.Bf6 gf6 13.Nc3 (13.Bf5 Bd7 14.Bd7 Kd7+=) 13...Bh6 (13...d5 14.Rfe1+=) 14.f4 Rhg8 (14...Rhg8 15.Bf5 Kb8=; 14...d5 15.Bf5 Bd7 16.Bd7 Rd7 17.Rae1+=). smoothmovermovesagain – shoulders, ChessWorld.net, 2006.

6.Ne2 Ne7 7.Bc7 g6 8.Be5 Rg8 9.Nd4 d6 10.Bf6 Nbc6 11.Bb5 a6 12.Bc6 bc6 13.0-0 Nd5 14.Re1 Be6 15.Ne6 Kd7 16.Nf8 Rgf8 17.Bh4 Rab8 18.c4 Nf4 19.Re7 Kc8 20.Nc3 h6 21.c5 d5 22.Bg3 g5 23.h4 Rb2 24.hg5 hg5 25.Rb1 Rd2 26.Rbb7 Ne6 27.Bd6 Rd8 28.Ra7 Rd7 29.Ra8 Kb7 30.Rb8 Ka7 31.Rd7 Nc7 32.Rc7 Normal 1-0. binko - aca2, Rated Blitz game, lichess.org, 2015.

7.Bb2 Bf5–/+ 8.Nc3 c6 (8...Bc2 9.Nd5 Kd8 10.Nf3–/+) 9.d3 Nd7 10.Nf3 Ngf6 11.0-0 0-0-0 (11...Ne5 12.Rfe1–/+) 12.h3 h6 13.Rae1 d5 14.Nh4 (14.Nd4 Be6+=) 14...Bh7 (14...Be6 15.Nf3–/+) 15.Nd1 (15.Nf3 Bd6+=) 15...Bb4–/+ 16.c3 Bd6 17.Ne3 Rhe8 18.c4 (18.Nhf5 Bf5 19.Nf5 Bf8+=) 18...dc4–+ 19.Nc4 (19.dc4 Be5 20.Be5 Ne5–/+) 19...Bb4–/+ 20.Bf6? (better is 20.Nf3–/+) 20...Nf6–+ (20...gf6?! 21.Nf3–/+) 21.Rb1 Re2 22.Rb4 Bd3 23.a4 (23.a3–+) 23...Nd5 (23...Nd5 24.Rb2 Bc4 25.Re2 Be2–+) 0–1. Tejler,Anders – Ziese,Gerhard, corr SOK–90–68, 1990.

7.Bb2 Bf5 8.d3 Nc6 9.Nf3 0-0-0 10.0-0 d5 11.Nbd2 (11.Re1 Nf6–/+) 11...f6 (11...Nf6 12.Rfe1–/+) 12.Rab1 (12.Rae1 Bd6–/+) 12...Bd6 13.Rfe1 Nge7 14.Bf1 (14.Nf1 d4–/+) 14...h5 (14...Rhe8 15.a3–/+) 15.Nh4 (15.Be2 Rde8–/+) 15...Rh6 (15...Rhe8 16.Nf5 Nf5 17.Be2–+) 16.Nf5 Nf5 17.Nf3 (17.g3 h4–/+) 17...g5 (17...d4–/+) 18.h3 (better is 18.d4!?–/+) 18...g4–+ 19.Nh2 (better is 19.Nd2–+) 19...gh3?? (better is 19...g3 20.Nf3 gf2 21.Kf2 Bg3 22.Kg1 Be1 23.Re1 d4–+) 20.g3+= Rg8?? (20...Kb8 21.Bh3 Nfd4–/+) 21.Bh3+/– Nce7 22.Bc1 (22.Re7 Be7 23.Bf5 Kb8+/–) 22...Rhh8 (better is 22...Rh7 23.Re7 Re7 24.Bf5 Kb8+=) 23.Kf1?? (better is 23.Re7 Be7 24.Bf5 Kb8 25.Nf3+/–) 23...h4 (better is 23...Kb8 24.Bb2 h4–/+) 24.g4? (24.Re7 Kd8 25.Bf5 Ke7= (25...Be7? 26.Rb7 Bd6 27.Bb2+–)) 24...Nd4 (24...Bh2 25.gf5 Rg1 26.Ke2 Re1 27.Ke1–+) 25.g5? (better is 25.c3!? Nc2 26.Re2+=) 25...Kb8–+ 26.gf6? (26.f4 fg5 27.fg5–+) 26...Bh2 (26...Nc2?! 27.Re7 Bh2 28.Bg2+=) 27.f4 Rg1 28.Kf2 Re1 29.Ke1 Ng8 (29...Nef5!? 30.Kf1 Re8 31.Bg4–+) 30.f7 Nh6 (30...Nc2?! 31.Kd2 Nh6 32.Kc2 Nf7 33.Be6–/+) 31.Bb2 c5 (31...Nc2?! 32.Kd1 Rf8 33.Kc2 Nf7 34.Rf1–+) 32.c3 (32.Bd4 cd4 33.Be6 Rf8 34.Bd5 b6–+) 32...Bg3 33.Kf1 Ndf5 34.Bc1 (34.c4 d4 35.Ba3 Rf8–+) 34...Rh7 (better is 34...Rf8–+) 35.f8Q+– (35.f8Q Kc7 36.Qc5 Kb8 37.Qd5+–) 1–0. Queenwomen – S, ChessWorld.net, 2005.

7.Bb2 Bf5 8.d3 Nf6 9.Nf3 (9.Bf6 gf6 10.Nc3 Nd7+=) 9...Nc6 10.Bf6 gf6 11.0-0 (11.Nc3 0-0-0+=) 11...Bg6 (11...d5 12.c3–/+) 12.Nbd2 0-0-0 13.a4 h5 14.a5 a6 15.h4 f5 16.Ng5 (16.d4 d5–/+) 16...Re8 17.Bf3 Ne5 18.Nc4 (18.d4!? Nf3 19.Ngf3–/+) 18...Nf3 19.Nf3 Re2 (19...Bg7 20.Rae1–/+) 20.c3 (20.Nd4 Re7 21.Ne3 Re5+=) 20...Bh6 (20...f4 21.d4–/+) 21.d4 Rhe8 22.Rae1 Re1 23.Re1 Re1 24.Ne1 f4 25.Nf3 Bd3 26.Nb2 Bb5 (26...Be2 27.Ng5 f3 28.gf3 Bg5 29.hg5 Bf3 30.Nc4–+) 27.c4 Bd7 28.d5 c6 29.dc6 bc6 30.Nd3 d5 (30...Be6 31.c5 Bc4 32.Nb4 dc5 33.Nc6–+) 31.cd5 cd5 32.Nd4 Be6 33.Nc5 Kc7 (33...f3 34.Na6 Bf8 35.Nc6+= (35.Nf3? Kb7–+; 35.gf3? Kb7–+; 35.Ne6?? fe6 36.gf3 Bd6–+)) 34.Nde6 (34.Na6 Kd6=) 34...fe6+= 35.Ne6 Kd6 36.Nd4 Kc5 37.Nf5 Bf8 38.f3 (38.Kf1!?+=) 38...d4–/+ 39.Kf1 Kc4 40.Ke1 d3 41.Kd1 Kc3 42.g3 fg3 43.Ng3 Bb4 (43...Be7!?–/+) 44.Nh5+= Ba5 45.f4 (45.Nf4 Bd8 46.h5 Bg5+=) 45...d2 (45...Bd8 46.f5 Bh4–/+) 46.f5 Bd8?? (better is 46...Kd4=) 47.f6+– Bf6?? (better is 47...Bc7+–) 48.Nf6 a5 (48...Kd4+–) 49.h5 a4 50.h6 1–0. var – dadeetdeetbleep, Live Game Caissa's Web, 2004.

7.Bd4 Bf5 8.Bf3 A) 8...Bc2?? 9.Bb7 c5 10.Bc3+– (10.Ba8?! cd4 11.Na3 Bd3+/–); B) 8...Nc6 9.Bc6 bc6–/+.