3.b5 b6 4.g3 (4.Bb2!? a6 5.Be5 ab5 6.Nc3=) 4...Bb7-/+ 5.f3 (5.Nf3 Bc5 6.e3 0-0-/+) 5...e4 (5...d5!? 6.Bb2 Bd6 7.Nh3-+) 6.Bg2 (6.Nc3 a6-/+) 6...Bc5 (6...a6 7.Nc3 ab5 8.Bb2-/+) 7.Bb2 (better 7.Nc3 a6 8.fe4 ab5 9.Nb5 Ne4 10.d4 Bb4 11.Kf1-/+) 7...Bg1 (better 7...a6!?-/+) 8.Rg1= 0-0 9.f4 (9.fe4 Ne4 10.e3 Qe7=) 9...Ng4 (9...d5 10.a4=+) 10.h4 (better 10.Nc3!? d5 11.e3=) 10...d5=+ 11.e3 Qd7 12.Bh3 (12.Nc3 f5=+) 12...f5 (better 12...Ne3!? 13.de3 Qh3-/+) 13.Bg4=+ fg4 14.a4 h6 (14...a6 15.h5=+) 15.Ba3 (15.Nc3 a5=) 15...Rd8 16.d4 (16.Qe2 c5=+) 16...ed3 (16...a6 17.Qe2-/+) 17.Qd3 d4 (17...Qf7 18.Nc3-/+) 18.ed4=+ Be4 (18...Qd4 19.Qd4 Rd4 20.Bb2=+) 19.Qd2 (19.Qc4!? Bd5 20.Qd3 Re8 21.Kf2=) 19...Qd4=+ 20.Qd4 Rd4 21.Bb2 Rc4 (21...Rb4!? 22.Ba3 Rc4=+) 22.Nd2= Bf3?? (better 22...Rc2 23.Ne4 Rb2+=) 23.Nc4+– Nd7 24.Kf2 Re8 (24...Nc5 25.Ne5 Be4 26.Bd4+–) 25.Rae1 (25.Rge1 Rc8 26.Re7 Nf6+–) 25...Re4 (25...Rf8 26.Re7 Rf7 27.Rge1+–) 26.Re4 (26.Nd2 Rb4 27.Bg7 Kf7 28.Nf3 gf3 29.Bh6 Nc5+–) 26...Be4 27.Re1 (better 27.Rd1 Nc5 28.Rd8 Kf7+–) 27...Bc2 (27...Nc5 28.a5 Bc2 29.Re8 Kf7 30.Rc8+–) 28.Re7 Nf6 (28...Nc5 29.Rg7 Kf8 30.Rc7 Ne4 31.Ke3 Ng3 32.Ra7 Nf5 33.Kf2+–) 29.Rc7 Ba4 (29...Ne4 30.Ke3 Ng3 31.Rg7 Kf8 32.Ra7 Nf5 33.Kd2+–) 30.Ra7 (better 30.Nd6 Bb3+–) 30...Bb5 31.Nb6 (31.Nb6 Ne8 32.Nc8+–) 1–0. pumpkin516 – arvin2709, gameknot.com, 2018.

3.b5 d5 4.Nf3 Bd6 5.Nc3-/+.

3.c3 d5 4.d4 e4 5.Nd2 Bd6 6.c4 0-0 7.cd5 a5 8.ba5 Ra5 9.Qc2 Rd5 10.e3 Rh5 11.Ne4 Ne4 12.Qe4 Re8 13.Qb1 Rh2 14.Rh2 Bh2 15.Nf3 Bd6 16.Bd3 g6 17.e4 c5 18.d5 f5 19.Bg5 Be7 20.Be7 Qe7 21.e5 Nd7 22.e6 Qd6 23.Qb3 Ne5 24.Be2 Ng4 25.Bc4 Rd8 26.Kf1 Nf6 27.Re1 Ne4 28.Qe3 b5 29.Bb5 Ba6 30.Ba6 Qa6 31.Kg1 Qd6 32.Rd1 Re8 33.Qb3 Rb8 34.Qd3 Rb2 35.Rf1 Ng3 36.Re1 Ne4 37.Nd2?? Qf8?? 38.Nc4 Rb8 39.d6 Qf6 40.e7 Kf7 41.f3 Qh4 42.Qe3 Rb3 43.Qe2 Qf6 44.fe4 Qd4 45.Kh2 Rb8 46.d7! f4 47.e8Q Re8 48.Rd1 Rf8 49.Rd4 cd4 50.Qd2 Ke7 51.Qd4 Kd8 52.Ne5 Ke7 53.Qc5 Ke6 54.Qf8 Ke5 55.Qe7 Kd4 56.d8Q Ke3 57.Qc5 Ke2 58.Qc4 Ke1 59.Qc1 Kf2 60.Qdd2# 1–0. GLChess207e – Amy06, computer chess game, 2000.

3.c3 d6 4.d4 Be7 5.de5 0-0?? (better 5...de5 6.Qd8 Bd8=+) 6.ef6+- Bf6 7.Nf3 Re8 8.e3 Bc3 (8...Nd7+-) 9.Nc3 c6 10.Be2 c5 11.bc5 dc5 12.Qd8 Rd8 13.Nb5 (13.e4 Be6+-) 13...Nc6 14.Nc7 Rb8 15.Nb5 (15.e4!? Bg4+-) 15...a6?? (15...Ra8 16.e4 Bg4+-) 16.Nc3+- Be6 (16...b5 17.e4+-) 17.Bb2 (17.Na4 c4+-) 17...Re8 (17...b5 18.Ng5+-) 18.0-0 (18.Ne4 b6+-) 18...Rbd8 (18...b5 19.Ne4 c4 20.Rfd1+-) 19.Rfd1 (better 19.Na4!? c4 20.Nb6 Ne7+-) 19...Rc8 (19...b5 20.Ne4 c4 21.Nd6+-) 20.Rd6 f6 (20...Red8 21.Rad1 Rd6 22.Rd6+-) 21.Rdd1 (better 21.Ne4 Na5 22.Bf6 gf6 23.Nf6 Kg7 24.Ne8 Re8+-) 21...b6 (21...Bb3 22.Rdc1 Na5 23.Nd2+-) 22.Ne4 (22.Ba6 Rb8 23.Bb5 Rec8+-) 22...b5 (22...Bb3 23.Nd6 Bd1 24.Rd1+-) 23.Nc5 b4 (23...Nb8 24.Na6! Na6 25.Bb5+-) 24.Ne6 ba3 (24...Re6 25.Ba6 Ree8 26.Bc8 Rc8 27.ab4 Nb4 28.Rd7+-) 25.Ba3 Re6 26.Bc4 Rce8 27.Be6 (better 27.Rd6 Nd8 28.Nd4 Kf7+-) 27...Re6 28.Nd4 Kf7 (28...Nd4 29.ed4 Rc6 30.Rac1+-) 29.Nc6 (better 29.Ne6 a5+-) 29...Rc6 30.Rac1 (30.Rac1 Rc1 31.Rc1+-) 1-0. universe64 (1930) - av232971, Daily UltraBullet Arena, 2019.

3.c3 Bd6 4.d4 ed4 5.cd4 0-0 6.e3 a6 7.Bd3 b5 8.Bb2 Nc6 9.Qc2 h6 10.d5 Ne5 11.e4 Nd3 12.Qd3 Be7 13.h3 d6 14.g4 Nh7 15.f3 Bf6 16.Bf6 Qf6 17.Ra2 Ng5 18.Nd2 Rb8 19.Ne2 Nh7 20.f4 Qd8 21.Qf3 f6 22.h4 Re8 23.f5 Kh8 24.Nf4 Kg8 25.Ng6 Nf8 26.Nf4 Bd7 27.0-0 c6 28.Re1 cd5 29.Nd5 Bc6 30.Nf4 Qb6 31.Kg2 Rbd8 32.Rc2 d5 33.Qf2 Qb7 34.Qc5 Rc8 35.Qd6 de4 36.Kg3 e3 37.Nb3 Red8 38.Qc5 Re8 39.Nd4 Nd7 40.Qd6 Be4 41.Rc8 Rc8 42.Qe7 Rf8 43.Re3 Qc8 44.Qe4 Ne5 45.Qd5 Kh8 46.Nde6 Re8 47.h5 Nc4 48.Rc3 Rd8 49.Qe4 Rd2 50.Ng6 Kg8 51.Ne7 1-0. Alco1 – Serafico, Rated Blitz game, lichess.org, 2014. (=1.a3 e5 2.b4 Nf6)

3.c3 Be7 4.Bb2 0-0 5.e3 last book move 5...a6 (5...Nc6 6.c4-/+) 6.Bc4 (6.d4!? e4 7.c4=+) 6...d5-+ 7.Bb3 (7.Be2 Nc6-+) 7...Bf5 (7...e4 8.d4 ed3 9.Qd3-/+) 8.d3 (8.Nf3 Nc6-/+) 8...Nc6 9.Qd2 (9.Nf3 Qd7-/+) 9...e4 (9...a5 10.Ne2-+) 10.d4 b5 (10...a5-+) 11.f3 (11.Ne2 a5-/+) 11...ef3 (better 11...Qd6!? 12.a4 ba4 13.Ba4-+) 12.Nf3 Bb1 (better 12...Bd6-+) 13.Rb1= Ne4 14.Qc2 (14.Qe2 Bh4 15.g3 Bf6=) 14...Bf6 (14...Re8 15.0-0=) 15.0-0 Ne7 (15...Re8 16.Nd2=) 16.Rbd1 (16.Nd2 Nd2 17.Qd2 a5+=) 16...c6 (16...Nf5 17.Qd3 c6 18.Nd2=+) 17.c4 (better 17.Nd2!? Nd2 18.Rd2=) 17...bc4=+ 18.Bc4 Ng3 (better 18...Nf5 19.Rde1 a5=) 19.hg3+– dc4 20.Qc4 (20.e4 Ng6+–) 20...Nd5 (20...Nf5 21.Rfe1 (worse 21.Qc6 Ne3 22.Rc1 Nf1 23.Kf1 Qe8-/+) 21...Ng3 22.Qc6+=) 21.Rfe1 Ne7 (21...Nb6!? 22.Qc2 a5 23.ba5 Ra5+–) 22.e4+– g6 23.Kf2 (23.g4 a5+–) 23...Qb6 (23...a5 24.g4+–) 24.e5 (24.g4!? Qb5 25.Rc1 Rfb8+–) 24...Bg7+– 25.Kf1 (25.Rc1 Rac8+–) 25...Nd5+= 26.e6 (26.Rc1 Rfc8+=) 26...fe6 (26...a5 27.Bc3 Qb5 28.Qb5 cb5 29.Bd2 ab4 30.Bb4 Nb4 31.ab4 fe6 32.Re6=) 27.Re6+= The isolani on c6 becomes a target 27...Rac8?? (27...Rf6 28.Rde1 a5+=) 28.Ke2 (better 28.Qd5! cd5 29.Rb6+–) 28...Qb5 (28...Qc7 29.Kf2 g5 30.Re4=) 29.Kd3 (29.Rc1 Rf6 30.Rf6 Bf6 31.Qb5 ab5+– (31...cb5?? 32.Rc8 Kf7 33.Rc6+–)) 29...Qc4 (better 29...Qa4!? 30.Qc2 Qb5 31.Qc4 Qa4=) 30.Kc4+– Nb6 (30...Rf6 31.Rde1+–) 31.Kb3+– Nd5 (31...Rf6 32.Re7 Rf7 33.Rf7 Kf7 34.Rh1+–) 32.Rc1+– Rf6 (32...a5 33.ba5 Ra8 34.Rec6 Ra5 35.Rc8+–) 33.Re7?? (better 33.Rf6 Bf6 34.Ka4+–) 33…Ne7-+ 0–1. quislingslayer – mic1960, gameknot.com, 2018.

3.Nc3 d5 4.Nf3 e4 (4...d4 5.Na2 e4 6.Ng1-/+) 5.Nd4=+ c6 6.Na4 (6.d3 a5 7.b5 c5=+) 6...Bd6-/+ 7.e3 Be5 (7...0-0-/+) 8.c4? (better 8.Bb2!?=+) 8...Bd4-+ 9.ed4 dc4 10.Bc4 (10.Bb2-+) 10...b5 (10...Qd4?! 11.Nb2-+) 11.Bf7 (11.d3 bc4 12.dc4 Be6-+) 11...Kf7 12.Qb3 (12.Nc5 Qd4 13.Qb3 Qd5-+) 12...Qd5 (better 12...Be6 13.Qe3 ba4-+) 13.Qd5 Nd5 14.Nc5 Rf8 (14...Re8!? 15.0-0-+) 15.Ne4 Bf5 16.Nd6 (16.d3 Nd7-+) 16...Kg6 17.Nf5 Rf5 18.0-0 h6 19.a4? (19.d3-+) 19...Nb4 20.ab5 (20.Ra3 Nc2 21.Rg3 Kf7-+) 20...cb5 21.h3 Nc2 22.Ra5 Nd4 23.Bb2 (23.Re1 Rd5-+) 23...Nbc6 (23...Nb3 24.Ra3 Nd2 25.Rg3 Rg5 26.Rg5 hg5 27.Re1-+) 24.Ra3 (24.Ra6 Ne2 25.Kh2 Rc8-+) 24...b4 (24...a5 25.Re1-+) 25.Rg3 Rg5 26.h4 (26.Rg5 Kg5 27.Ra1 a5-+) 26...Ne2 27.Kh2 Ng3 28.fg3 (28.Rc1 Ne5 29.hg5 Ne2-+) 28...Rd5 29.g4 (29.Rc1 Rc8-+) 29...Rd2 30.Bc1 Rc2 31.h5 Kh7 32.Bf4 (32.g5 hg5 33.Bg5 a5-+) 32...Rf8 33.Kg3 (33.Kh3 g5 34.hg6 Kg6-+) 33...Rc3 (33...b3 34.Kf3 Rc3 35.Ke4 Rc4 36.Kd3 Rcf4 37.Rf4 Rf4 38.Kc3-+) 34.Rf3 (34.Kh2-+) 34...Rf3 35.gf3 b3 (better 35...Rf4 36.Kf4 b3 37.Ke4-+) 36.g5 (36.Bc1 Nd4 37.Kf2 Rf3 38.Ke1 Rg3-+) 36...hg5 (36...b2 37.Be3 b1Q 38.g6 Kg8 39.f4 Qd3 40.Kf3 Nd4 41.Kg2 Qe2 42.Kh3 Qe3 43.Kh2 Qf2 44.Kh1 Rc8 45.f5 Rc1) 37.Bg5 Ne5 (37...b2 38.Kf2 b1Q 39.Be3 Qa2 40.Kg3 Qe2 41.Bf4 Ne5 42.Kh3 Qf3 43.Bg3 Rf5 44.Kh2 Ng4 45.Kg1 Qf1) 38.f4 Nd3 (38...b2 39.Bf6 gf6 40.f5 Rg8 41.Kf4 b1Q 42.Ke3 Qb6 43.Ke4 Rg4 44.Kd5 Rd4) 39.Kg4 b2 40.Be7 Rf4 41.Kg5 (41.Kg3 b1Q 42.Kh2 Rf2 43.Kh3 Qh1 44.Kg3 Qg2 45.Kh4 Rf4) 41…b1Q (41...b1Q 42.Bc5 Qb5 43.h6 Qc5) 0-1. tempus_fugit - slava55, Rated Classical game, lichess.org, 2015.

3.Nc3 Bd6 4.e4= 0-0 5.Bc4 (5.Nf3 a5 6.b5 Bc5=) 5...Be7 6.Nf3 d6 (6...a5 7.ba5 Ne4 A) worse is 8.Ne5 Nc3 9.Nf7 A1) 9...Nd1 10.Nd8 Kh8 11.Nf7 Kg8 12.Ne5 (worse is 12.Kd1 Rf7 13.Re1 Nc6+=) 12...Kh8 13.Kd1+=; A2) 9...Rf7 10.Bf7 Kf7 11.dc3 Ra5-/+; B) 8.Ne4=) 7.0-0 c6 (7...Nc6 8.Qe2=) 8.d3 (8.d4 Nbd7=) 8...d5 9.ed5 cd5 10.Bb3 d4 11.Ne4 Ne4 (11...Qc7 12.Qe2=) 12.de4 Nc6 (12...Qc7 13.Qd3=) 13.Qd3 (13.b5 Na5 14.Ne5 Nb3 15.cb3 Bf6+=) 13...Bg4 (13...Qc7 14.c3=) 14.h3 (better is 14.b5!? Bf3 15.bc6+/– (15.Qf3?! Na5=)) 14...Bf3= 15.Qf3 a5 (15...Qc7 16.c3=) 16.b5 Na7 17.a4 b6 (17...Rc8 18.Qg3 Qc7 19.Bh6+=) 18.c3+/– dc3 19.Qc3 Nc8 (19...Bc5 20.Qg3 (20.Qe5? Bd4 21.Qf5 Ba1-+) 20...Bd4 21.Bg5+=) 20.Bd5 (20.Rd1 Bd6+–) 20...Bb4 (20...Ra7 21.Qg3+/– (worse is 21.Qe5 Bf6 22.Qb8 Ba1+=)) 21.Qc2 (better is 21.Qe5!? Bd6 22.Qh5+–) 21...Rb8 (21...Ra7 22.Rd1 Qf6 23.Ba3+=) 22.Rd1 (22.Bb2 Qg5+/–) 22...Qf6+= 23.Qc7 Ne7 24.Bb2 (24.Bb7 Bc5 25.Ra2 Ng6+=) 24...Bc5 25.Rd2 (25.Qe5 Nd5 26.ed5 Qf2 27.Kh1 f6 28.Qe6 Kh8=) 25...Nd5= 26.ed5 Rbe8 27.d6 Rc8 28.Qb7 Rcd8 29.d7 Qe6 30.Rad1 Be7? 31.Qc7 f6+/– 32.Re2 Rf7 33.f4 Bc5 34.Kh1 Rdd7+= 35.Qc8 Bf8 36.Rd7 Rd7+= 37.Re1 Re7 38.Qb8 Re8 39.Qb7 Bc5 40.fe5= f5 41.Qf3 Rf8 42.Bc1 Bb4 43.Re2 Rc8 44.Qf1 Rc5 Attacking the isolated pawn on e5 45.Bf4 Bc3 The pressure on the isolated pawn grows 46.Qf2 Be5?? 47.Be5?? Re5= 48.Re5 Qe5 49.Qb6 Qe1 50.Qg1+= Qe7 51.Qd4+– Kf8 52.b6 Qb7?? 53.Qd6 Ke8 54.Qe5 Kd8 55.Qa5 Kc8 56.Qf5 Kb8 57.a5 g6 58.Qe5 Ka8 59.Qh8 Qb8 60.Qh7 Qe5 61.Qa7# 1–0. langelli (2020) – sgrant (2055), net–chess.com, 2008.

3.c4 a6 4.Bb2 d5 5.Be5 dc4 6.e3 Be6 7.Nc3 Nc6 8.Bf6 gf6 (better is 8...Qf6!? 9.Nge2 Bd6+=) 9.d3+= cd3 10.Qd3 Bd6 11.Ne4 Be5 12.Qd8 Rd8 13.f4?? (better is 13.Rd1+=) 13...Ba1-+ 14.Bd3 (14.Nc5-+) 14...Rd3 15.Ne2 Re3 16.0-0 Re4 17.Ng3 White intends f5 17...Bd4 18.Kh1 Re3 19.f5 Bd7 20.Nh5 Ra3 21.Ng7 Kf8 22.Nh5 Rg8 (better is 22...Nb4 23.Nf4-+) 23.h3 Rg5 (23...Nb4 24.Nf4 Bc6 25.Kh2-+) 24.g4 Rh5! 25.gh5 (25.gh5 Rh3 Double attack) 25...Rb3 26.Kh2 Rb4 (better is 26...Rb2 27.Kg3 Be5 28.Kg4-+) 27.h6 Be5 (27...Rb2 28.Kg3 Be5 29.Kg4 Nd4 30.Kh5 Bb5 31.Rf4 Bf4 32.Kg4 Rf2 33.Kh4 c5 34.Kg4 Be2 35.Kh4 Nf5) 28.Kg2 Rf4 29.Rf4 Bf4 30.Kf3 Bh6 (30...Bh6 31.Ke4 a5-+) 0–1. bogdanmik – cngzyksl, internet, 2013. (=1.a3 e5 2.b4 Nf6)

3.c4 b5 4.cb5 d5 5.e3 a6 6.ba6 Ba6 7.Ba6 Na6 8.Qb3 Nb4 9.Nf3 e4 10.Ne5 Bd6 11.Bb2 Qe7 12.d4 Be5 13.ab4 Ra1 14.Ba1 Bd6 15.Bc3 0-0 16.0-0 Bh2 17.Kh2 Ng4 18.Kg3 Qg5 19.f4 Qg6 20.f5 Qg5 21.Kh3 Qe3 22.g3 Nf2 23.Kg2 Qf3 24.Kh2 Ng4 25.Kh3 Qf1 26.Kg4 Qf3 0-1. marleylion62 (1885) - Creizzan (1875), Rated Blitz game, lichess.org.

3.c4 Ne4 4.f3?? (4.Nf3 Nc6+=) 4...Ng5 (better 4...Qh4 5.g3 Ng3-+) 5.e4 (5.Bb2 a5=+) 5...d6 (5...Ne4 6.Ne2 (6.fe4? Qh4 7.g3 Qe4 8.Kf2 Qh1-+) 6...Nd6 7.Ng3-/+) 6.d3 (6.Nc3 Ne6=+) 6...Nc6 (6...Be7 7.Nc3-/+) 7.g3 (7.Nc3 Be7=+) 7...f6 (7...Be7!?-/+) 8.h4 Nf7 (8...Ne6 9.Ne2=+) 9.h5 (9.Ne2!?=) 9...Nd4 10.g4 (10.Be3 a5 11.Nd2 c5=+) 10...b6 (10...a5 11.Bb2-/+) 11.Qa4 (11.Be3 Be7-/+) 11...c6 (11...Bd7 12.Qd1 a5 13.b5-/+) 12.Be3-/+ Bb7 (12...b5 13.Qd1-/+) 13.Nd2 (better 13.Bd4 ed4 14.Ne2=+) 13...h6 (13...a5 14.b5 cb5 15.Qd1-/+) 14.Rc1 (better 14.Bd4 ed4 15.Ne2+=) 14...g5?? (14...a5 15.b5 c5 16.Ne2=+) 15.b5?? (better 15.hg6 Ng5 16.Bd4 ed4 17.f4+-) 15...c5=+ 16.Bh3 (16.Ne2 Bg7=+) 16...Bg7-/+ 17.Bg2 (17.Ne2 0-0-/+) 17...Ne6 (17...0-0!?-/+) 18.Ne2=+ 0-0 19.Nb3 (19.Qb3 a6=+) 19...a5 (better 19...a6!? 20.Nd2 Nd4 21.ba6 Ra6-/+) 20.Nc3 (better 20.Kf2=) 20...f5?? (better 20...Nf4 21.Bf1 Qd7=) 21.gf5+- (21.ef5?! Nf4 22.0-0 Nd3=) 21...Nc7 (21...Nf4!? 22.Bf1+-) 22.Kd2 Ne8 23.Nd5 Bd5 (23...Nf6 24.Kc2+-) 24.cd5 (24.ed5?! Bh8+=) 24...Nc7 25.Rc2 (25.Rb1!? Qe8+-) 25...Qd7 26.Bh3 (better 26.Rb2 Nd5 27.ed5+-) 26...Rad8?? (26...Qb5 27.Qb5 Nb5 28.a4+=) 27.Rh2 (better 27.f6!? Qb5 28.Qb5 Nb5 29.fg7 Kg7+-) 27...Qe7? (better 27...Qb5!? 28.Qc4 a4+=) 28.Kc1 (better 28.Qc4+-) 28...g4? (28...Qe8 29.Rb2+-) 29.fg4 (29.Bg4 Bf6+-) 29...Qh4 (29...Bf6 30.Nd2+-) 30.Bf2 (30.Kb2 Qe7 31.Qc4 a4 32.Qa4 Qe8+-) 30...Qg5 31.Kb2 Qf4 (31...Rde8+-) 32.Bh4 Qf3 33.Qc4 (33.f6 Bh8 34.Rcf2 Qd1+-) 33...Ng5 34.Bg5 Rde8 (34...hg5 35.h6! Bf6+-) 35.Rcf2 Qd1 (35...Qf2 36.Rf2 hg5 37.Nd2+-) 36.Bh4 (36.Rf1!? Qf1 37.Bf1 hg5+-) 36...a4 37.Qa4 (37.Nd2!? Qg1 38.Qa4 Ra8+-) 37...Qd3 (37...Ra8 38.Qc4 Ra3 39.Rf1 Rb3 40.Qb3 Qb3 41.Kb3+-) 38.Nc1 (better 38.Bf1 Qe3 39.Rh3 Qe1+-) 38...Qe3 39.Rfg2 (better 39.Qc4 Qd4 40.Kb3 Bf6 41.Bf6 Rf6+-) 39...Ra8 40.Qb3 (better 40.Qc4 Qa3 41.Kc2+-) 40...c4 (40...Qe4 41.g5 Qd4 42.Qc3 Qc3 43.Kc3 Nb5 44.Kc4 Na3 45.Kb3 hg5 46.Bg5+-) 41.Qb4 (better 41.Qe3 Nb5 42.g5 c3 43.Kb3 Nd4 44.Ka2+-) 41...Qd4 (41...Qe4 42.Rc2 Qd4 43.Kb1 Nd5 44.Qc4 Ra3 45.Qd4 ed4 46.Bg2+-) 42.Qc3 (42.Kb1 Qe4 43.Rc2 Nd5 44.Qc4 Qc4 45.Rc4 Ra3+-) 42...Qc5? (42...Qe4 43.Rg3 Nb5 44.Qb4 c3 45.Rc3 Nc3 46.Qc3= (46.Kc3 Qe3 47.Kb2 e4 48.f6 Rf6 49.Bf6 Bf6 50.Kb1 Ra3-/+)) 43.Be7 (better 43.Ne2 Nb5 44.Qb4 Qb4 45.ab4+-) 43...Qb5?? (43...Nb5 44.Nd3! Qe3=) 44.Kc2 (44.Qb4 Rf7 45.g5 Qb4 46.ab4 hg5 47.Bg5 Kh8+-) 44...Rfe8 (44...Qa4 45.Kd2 Nb5 46.Qe3 c3 47.Ke1+-) 45.f6 Bf6 (45...Re7 46.fe7 Bf6+-) 46.Bf6 Qa4 47.Kb2 (better 47.Kd2 Qa3 48.Qc4 Qa5 49.Ke2+-) 47...Nb5+/- 48.Qd2?? (better 48.Qe3 Na3 49.g5 (49.Qh6?! c3 50.Ka1 Nc2 51.Kb1 Na3 52.Ka1 Nc2 53.Kb1 Na3 54.Ka1=) 49...c3 50.Qc3 (50.Kc3 Rac8 51.Kd3 Qb5 52.Kd2 Nc4 53.Ke1 Qb4 54.Kf2 Ne3 55.Bc8 Rc8 56.gh6 Ng2 57.Rg2 Kh7-+) 50...Nc4 51.Kb1 Na3 52.Ka1 Nb5 53.Ra2 Nc3 54.Ra4 Ra4 55.Kb2 Ne4 56.Bd7+-) 48...Qa3-+ 49.Kb1 Qa1 50.Kc2 Na3 (50...Ra2 51.Kd1 Rd2 52.Rd2 Nc3 53.Ke1 Qc1 54.Kf2 Qd2 55.Kg1 Qe3 56.Kh1 Qe1 57.Kg2 Ra8 58.Kf3 Qe4 59.Kg3 Qe3 60.Kg2 Ra2 61.Kh1 Qe1 62.Bf1 Qf1) 51.Kd1+- c3 (51...Qd4 52.g5 Kf8 53.gh6 Qd2 54.Kd2 Ra7 55.Bg7 Ke7+-) 52.Qh6 Ra7 (52...c2 53.Ke2 Re7 54.Qh8 Kf7 55.Qg7 Ke8 56.Qe7) 53.Qh8 Kf7 54.Qg7 1-0. Paul593 - VINIJR017, ChessWorld.net, 2009.

3.d3 a6 4.c3 (4.Nf3 Nc6=) 4...Nc6 5.Bb2 Bd6 (5...d5 6.Nf3=+) 6.Nd2 0-0 7.Nb3 b6 8.c4 Bb7 9.e4 Re8 10.Nf3 h6 11.Be2 b5 12.c5 Be7 (12...Bf8 13.0-0=) 13.0-0 (13.Ne5 Ne5 14.Be5 d5 15.cd6 Bd6+/-) 13...a5 (better 13...d6=) 14.Ne5+/- Ne5 15.Be5 ab4 16.ab4 Ra1 17.Qa1 d6 18.cd6 Bd6 19.Bd6 Qd6 20.Nc5 Bc8 21.f3 (21.d4 Ne4 22.Bb5 c6 23.Ne4 Re4+-) 21...Qf4 22.g3 (22.Rd1 Qe3 23.Kf1 Qf4+/-) 22...Qe3 23.Rf2 Nd7 (23...Qd2 24.Qa5 c6 25.Bf1+=) 24.Nd7 Bd7 25.Kg2 (25.d4 c6+=) 25...Qb6 (better 25...Bh3! 26.Kg1 Rc8=) 26.d4+/- Qe6 27.d5 Qh3 (27...Qd6!? 28.Qd4 Kf8+/-) 28.Kg1+- f5 (28...c6 29.Bf1 Qh5 30.Qa7+-) 29.e5 f4 30.g4 c6 (30...Re7 31.e6 Be8 32.Qa8+-) 31.e6 Bc8 (31...Be6 32.de6 Qh4 33.Bd3+-) 32.Qe5 (32.Qa7 Be6 33.de6 Re6+-) 32...cd5 (32...Qh4 33.Qc7 Be6 34.de6 Re6+-) 33.Qd5 (better 33.Bb5 Re6 34.Qd5+-) 33...Be6+/- 34.Qe5 Kf7 (34...Bd7 35.Qf4 Qh4 36.Qd4+/-) 35.Qb5 (35.Bb5 Rc8+-) 35...h5 (35...Qh4 36.Bc4 Qf6 37.Qd7 Re7 38.Be6 Qe6 39.Qe6 Re6 40.Rb2+/-) 36.Qh5 (36.Qg5!? hg4 37.Qf4 Kg8 38.fg4 Ra8+-) 36...Kf8?? (better 36...Qh5 37.gh5 Rh8+/-) 37.Qh3+- 1-0. rotcehnebur – ravinal, Rated Blitz game, lichess.org, 2015. (=1.a3 e5 2.b4 Nf6)

3.d3 Bd6 4.c4 c5 5.b5 0-0 6.a4 a6 7.Bd2 (7.Bb2 Bc7 8.Nf3 e4 9.de4 Ba5 (worse 9...Ne4 10.Qd5 Qe7 11.Ra3 Ba5 12.Nfd2=) 10.Nc3 Ne4-/+) 7...ab5-/+ 8.cb5 b6 9.Qc1 (9.Nc3!?-/+) 9...e4 10.Qc4? (10.Nc3 ed3 11.ed3 Re8 12.Be2 Bb7-/+) 10...ed3 (better 10...Be5 11.Ra3 d5-+) 11.Qd3 Bb7?? (better 11...Bc7 12.a5 ba5-+) 12.Qd6+- Ne4 13.Qf4 d5 14.Bc1 Nd7 15.Bb2 Qe7 16.Qc7?? (16.Nf3 d4+-) 16...Rab8?? (16...Nd6 17.Nd2-+) 17.f3?? (17.Nf3 Rfe8 18.Qf4 d4+/-) 17...Rfc8 (better 17...Nd6 18.a5 Rbc8 19.ab6 Rc7 20.bc7 Nb5-+) 18.Qf4+/- Nef6 19.g4?? (better 19.a5 ba5 20.Nd2+/-) 19...d4-/+ 20.Kd1? (better 20.g5 Nd5 21.Qc1-/+) 20...Nd5-+ 21.Qd2 (21.Qc1 Ne3 22.Kd2 Ne5-+) 21...Ne5 (better 21...Ne3 22.Kc1 Nf1-+) 22.Bh3 (22.Kc1 Nc4 23.Qe1 Nb2 24.Kb2 c4-+) 22...Rd8 (22...Nc4 23.Bc1 Nde3 24.Qe3 de3-+ (worse 24...Qe3 25.Be3 Ne3 26.Kc1+/-)) 23.Na3 Ne3 24.Ke1?? (24.Kc1-+) 24...N3c4 (24...Qh4) 25.Nc4-+ Nc4 (25...Qh4 26.Kd1 Nc4 27.Qf4 Nb2 28.Kc2-+) 26.Qc1 Bd5 27.e4?? (27.Ra3-+) 27...Nb2 (better 27...de3 28.Ne2 Qh4 29.Ng3 Qh3-+) 28.Qb2+/- Be4? (28...d3 29.Kf2 Bb7+=) 29.Ne2?? (better 29.fe4 Qe4 30.Kf2+-) 29...Bf3-+ 30.Rf1 Be2 (better 30...Qh4 31.Ng3 Re8 (31...Qh3?! 32.Rf3 Re8 33.Kd1-+) 32.Kd2 Qh3-+) 31.Rg1 (31.Qe2 Qh4 32.Kd1 Qh3 33.Qf3 Qh2 34.Qf7 Kh8 35.Ra2-+) 31...Bg4 32.Kd2 Bh3 (better 32...Qe3 33.Kc2 Qh3 34.Rad1-+) 33.Rae1 (33.Kd1 Re8 34.Qd2 c4-+) 33...Qd6 34.Rg3 (34.Kd1 c4 35.Qf2 Qa3-+) 34...Be6 (34...Qf4!? 35.Kd1 Bg4 36.Rg4 Qg4 37.Qe2-+) 35.Reg1 (35.Kd1 g6 36.a5 ba5-+) 35...Qf4 (better 35...g6 36.Qa3-+) 36.Kc2 (36.Ke1 g6 37.Qd2 Qe5 38.Qe2 Qd6-+) 36...g6 37.h4 c4 (37...d3 38.Kb1 d2 39.Rc3 d1Q 40.Rd1 Rd1 41.Rc1 Bf5 42.Ka2 Qa4 43.Qa3 Rd2 44.Rc2 Qc2 45.Qb2 Qb2) 38.Qc1 Qe4 39.Kb2 c3 40.Ka3 Qd5 41.Qh6 (41.Rg6 fg6 42.Rg6 hg6 43.Qb1 Qd6 44.Qb4 c2 45.Kb2 Qb4 46.Kc2 d3 47.Kd1 Rbc8 48.a5 Bg4) 41…Qc5 0-1. Paul593 - tazpaz (1625), ChessWorld.net, 2009.

3.d4 Bd6 4.Nf3 ed4 (4...e4 5.Nh4=+) 5.Qd4= b6 (5...Nc6 6.Qc3=) 6.Bg5 Nc6 7.Qb2 (7.Qh4 Bb7=) 7...0-0 (7...Be7 8.b5 Nb8 9.e4=) 8.b5+= Nb8 9.Nbd2 (9.Bf6 gf6 10.e3 Bb7+=) 9...h6 (better is 9...Be7!?=) 10.Bf6+= Qf6 (10...gf6 11.e3 a6 12.Qd4+/–) 11.Qf6+/– gf6 12.Ne4 Be5 (12...Be7 13.Ng3 d5 14.Nd4+=) 13.Ne5+/– fe5 14.Nf6 Kg7 15.Nd5 c6 (15...a6!? 16.Nc7 Ra7+/–) 16.Nc7+– d5? (better is 16...Bb7 17.Na8 Ba8+–) 17.bc6 Ba6 (17...Nc6 18.Na8 Nd4 19.0-0-0+–) 18.Na8 Nc6 (18...Rc8 19.c7 Nc6 20.Nb6 ab6 21.Rb1+–) 19.Nc7 Nd4 (19...Bc4 20.e3+–) 20.0-0-0 (20.Na6?! Nc2 21.Kd1 Na1+–) 20...Bc8 (20...Bb7 21.Nd5! Rc8 22.Ne3+–) 21.e3 Ne6 22.Nd5 (22...Nc5 23.Bb5+–) 1–0. mtrold1 – Tarinus, internet live, 2001.

3.e3 b6 4.Bb2 d6 5.c4 Bb7 6.Nf3 g6 7.Nc3 Bg7 8.Be2 0-0 9.0-0 c5 10.d4 ed4 11.ed4 cd4 12.Nd4 Nc6 13.Nf3 (13.Ndb5!? Ne8 14.Bf3+=) 13...Ne5 14.Nb5 Attacks the isolani on d6 14...Nf3 (14...Ne4 15.Ne5 de5 16.Qd8 Rfd8 17.Rfd1=) 15.Bf3 Bf3 16.Qf3 a6 17.Nd4 Rc8 (17...Re8 18.Rae1 Qd7 19.Nc2+=) 18.Nc6+= Qd7 19.b5 (worse 19.Bf6 Qc6 20.Qc6 Rc6 21.Bg7 Kg7=) 19...ab5 20.cb5 Rfe8?? (better 20...Ng4 21.Bg7 Kg7+–) 21.Bf6+– Bf6 22.Qf6 Re4 23.Rad1 Re6 (23...d5 24.f3 Re2 25.Rfe1+–) 24.Qd4 Qc7 25.g3 Rce8 26.Rd3 Re2 27.Re3 R2e3 28.fe3 f5 29.Rd1 Re6 (29...Re4 30.Qf6 Qf7 31.Qd6 Qb3+–) 30.Qd5 Kf7 31.Nd4 Qd7 32.Qe6 Qe6 33.Ne6 Ke6 34.a4 d5 35.Rc1 Kd7 36.Rc6 (36.a5 d4 37.ed4 Ke7 38.ab6 Kd6 39.b7 h5 40.b8Q Ke6 41.Qc7 Kf6 42.Rc6 Kg5 43.Qf4) 36...Ke7 37.Rb6 Kf7 38.a5 Kg7 (38...f4 39.gf4 Ke8 40.a6 Kd8 41.a7 Kd7 42.a8Q d4 43.Qa7 Kd8 44.Rb8) 39.a6 Kh6 (39...d4 40.ed4 g5 41.a7 Kf7 42.a8Q Kg7 43.Qa7 Kf8 44.Rb8) 40.a7 d4 41.ed4 Kh5 (41...Kg5 42.a8Q f4 43.Qd5 Kg4 44.Kf2 fg3 45.hg3 g5 46.Qd7 Kh5 47.Qh3) 42.a8Q h6 (42...Kg4 43.Kg2 Kg5 44.Qd8 Kh6 45.Qh4 Kg7 46.Rb7 Kf8 47.Qd8) 43.Qf3 Kg5 44.h4 1–0. combijack (1850) – dublinsoul2 (1775), gameknot.com, 2016.

3.e3 Nc6 4.c4 Be7 5.Bb2 0-0 6.b5 Na5 7.Be5 Nc4 8.Bc4 d6 9.Bf6 Bf6 10.d4 (10.Nc3 Bf5+–) 10...Qe7 (10...a6 11.ba6 c5 12.Nf3+–) 11.Ne2 c5 (11...Be6 12.Be6 fe6 13.Nbc3+–) 12.bc6! bc6 13.0-0 d5 14.Bd3 Bg4 15.Qc2 Be2 16.Be2 Rab8 17.Nd2 (17.Qc6!? Bd4 18.ed4 Qe2+–) 17...Bd4 18.Rab1 (18.ed4 Qe2 19.Rfe1 Qa6+–) 18...Bb6 19.Qc6 Rfd8 (19...d4 20.e4+–) 20.Bf3 (better 20.Rb3+–) 20...Be3 (20...Qa3 21.Rfd1 Rbc8+–) 21.Rb8 Rb8 22.Nb1 (better 22.fe3 Qe3 23.Rf2 Qa3 24.Bd5+–) 22...Bc5 (22...Qc5 23.Qc5 Bc5 24.Bd5+–) 23.a4 (23.Bd5 Rb6 24.Qc8 Qf8+–) 23...h6?! (23...d4 24.Rd1+–) 24.Qd5 Rb2 (24...Qc7 25.g3+–) 25.Qa8 (25.Nd2!? Qg5 26.Qg5 hg5+–) 25...Kh7 26.Qe4 Qe4 27.Be4 g6 28.g3 Rb4 (28...f5 29.Bc6+–) 29.Bc6 h5 (29...Rb2 30.Nc3+–) 30.h4 Rb6 31.Bd5 Rf6 (31...Rb4 32.Rc1 Bb6 33.Nc3+–) 32.Kg2 a5 (32...Bb4 33.Rc1+–) 33.f4 (33.Nc3!? Be7+–) 33...Kg7 34.Rc1 Be3 (34...Bb6 35.Na3 Rd6 36.Rd1+–) 35.Rc7 Rf5 36.Ba2 Bc5 (36...Bb6 37.Rd7 Rc5 38.Bf7 Rc2 39.Kf3 Rf2 40.Ke4 Re2 41.Kd5+–) 37.Nc3 Bd6 (37...Bb6 38.Rb7 Rc5 39.Rf7 Kh8 40.Ne4+–) 38.Ra7 Bb4 (38...Bb8 39.Rb7 Bf4 40.gf4 Rf4 41.Kg3 Rg4 42.Kh3+–) 39.Ne4 Be1 (39...Kf8 40.Bc4 Ba3+–) 40.Ng5 Bg3 (40...Rf6+–) 41.Kg3 Rg5 (41...Rf6 42.Rd7 Ra6 43.Bf7 Kh6 44.Bc4 Ra7 45.Nf7 Kg7 46.Ra7 g5 47.Nh6 Kf8 48.Bb5 gh4 49.Kf3 h3 50.Rf7) 42.fg5 Kh7 (42...Kg8 43.Bf7 Kg7 44.Be8 Kh8 45.Bg6 Kg8 46.Kf4 Kf8 47.Kf5 Kg8 48.Kf6 Kf8 49.Ra8) 43.Rf7 Kg8 (43...Kh8 44.Kf3 Kg8 45.Kf4 Kh8 46.Ke5 Kg8 47.Kf6 Kh8 48.Kg6 Kg8 49.Bd5 Kh8 50.Rh7) 44.Ra7 (44.Kf4 Kh8 45.Ke5 Kg8 46.Kf6 Kh8 47.Kg6 Kg8 48.Bd5 Kh8 49.Rh7) 44...Kh8 (44...Kf8 45.Bf7 Kg7 46.Kf4 Kh7 47.Be8 Kg8 48.Bg6 Kf8 49.Kf5 Kg8 50.Kf6 Kf8 51.Ra8) 45.Bb1 Kg8 46.Bg6 Kf8 (46...Kh8 47.Kf4 Kg8 48.Kf5 Kf8 49.Kf6 Kg8 50.Ra8) 47.Kf4 Kg8 48.Kf5 Kf8 (48...Kh8 49.Kf6 Kg8 50.Ra8) 49.Kf6 Kg8 50.Ra8 1–0. dbinc007 – ricardodf, gameknot.com, 2017.

3.e3 e4 4.c4 d5 5.cd5 Nd5 6.Bc4 (6.d3 Nf6=) 6...c5 (6...Nb6 7.Bb5 c6 8.Bf1=+) 7.Qh5 (7.Qb3 Qg5 8.g3 Be6 9.bc5 Nd7=) 7...Be6=+ 8.Bb2 Nf6 9.Bf6 (9.Qe2 Bf5=+) 9...Qf6-/+ 10.Be6 Qa1 (10...Qe6!? 11.bc5 Nd7-/+) 11.Qf7= Kd8 12.Qb7 Qb1 13.Ke2 Qd3 14.Ke1 Nd7 (better is 14...Qb1 15.Ke2 Qd3 16.Ke1 Qb1 17.Ke2=) 15.Qa8+/– Ke7 16.Qd5 (better is 16.Ba2!?+/–) 16...cb4 (16...Qb1 17.Ke2 Qd3 18.Kd1 Qb1 19.Ke2 Qd3 20.Ke1 Qb1 21.Ke2=) 17.Qd3 (17.f3 Nf6 18.Qd3 ed3+=) 17...ed3= 18.Bd7?? (better is 18.Ba2 ba3 19.Nh3=+) 18...ba3-+ (19.Be6 Ke6-+; 18...Kd7?! 19.ab4 Bb4 20.Nf3=+) 0–1. rommeltdf (1800) – winston (1935), net–chess.com, 2002.

3.e4 c5 4.Nc3 cb4 5.ab4 Bb4 6.Nge2 (6.Bb2 0-0 7.Qf3 d6-/+) 6...d5 7.ed5 Nd5 8.Nd5 Qd5 9.Bb2 (9.Ba3 Ba3 10.Ra3 0-0-/+) 9...0-0-+ 10.c3 Bd6 11.h3 (11.Ng3 Nc6-+) 11...Nc6 12.Ng3 e4 13.Ne2 (13.Ba3 Ba3 14.Ra3 Ne5-+) 13...Bf5 (13...Re8 14.Qa4-+) 14.Ba3 Ne5 (14...Rfd8 15.Bd6 Rd6 16.Ra4-+) 15.Bd6?? (better 15.Nd4 Bg6 16.Bd6 Qd6 17.Qb3-+) 15…Nd3 (15...Qd6?! 16.Nd4 Bg6 17.Qb3-+) 0-1. Dragan_April (1655) - Kuglarz2 (1885), Rated Classical game, lichess.org, 2014. (=1.a3 A00: Irregular Openings 1...e5 2.b4 Nf6)

3.e4 d6 4.h3 (4.Nc3 Be7=) 4...Be6 (4...Ne4!? 5.Nf3 Be7-/+) 5.Nc3=+ Be7 6.Nf3 0-0 7.d3 (7.d4 a5 8.b5 ed4 9.Nd4 d5=) 7...Nbd7 8.Bg5 (8.d4 ed4 9.Nd4 a5=) 8...c6 9.d4 Rc8 10.d5 (10.Be2!?=) 10...cd5-/+ 11.Bb5?? (better 11.Nd5 Bd5 12.ed5-/+) 11...Rc3-+ 12.Bd2 Rc7 13.Be3 (13.ed5 Nd5 14.0-0 Nc3 15.Bc3 Rc3-+) 13...de4 (13...Ne4 14.Bd2-+) 14.Ng5 Bf5 (better 14...Bd5 15.f3-+) 15.Ba7 (15.g4 a6 16.Be2 Be6 17.Ne6 fe6-+) 15...b6 16.Bd7 (16.g4 Bg6 17.h4 e3 18.Bb6 Nb6 19.fe3 Nbd5-+) 16...Rd7 (16...Nd7 17.Bb6 Nb6 18.g4-+) 17.0-0 (17.g4 Bg6 18.h4 h5 19.gh5 Bh5 20.Bb6 Qb6-+) 17...Ra7 18.g4 (18.f4 ef4 19.Rf4 Bg6-+) 18...Bg6 19.f3 (19.h4 h5 20.gh5 Bh5-+) 19...h6 (better 19...d5!? 20.fe4 de4 21.Qd8 Rd8 22.h4 Ng4 23.c4-+) 20.Ne4 Ne4 21.fe4 Be4 22.c4 Qa8 23.c5 (23.Qe2 Rc8 24.Rfe1 Bg6-+) 23...bc5 (better 23...Ra3 24.Qe1 Bh1 25.c6 Qc6 26.Rf2 Rg3 27.Kf1-+) 24.b5 (24.Qc1 cb4 25.a4 Ra4 26.Ra4 Qa4-+) 24...Ra3 25.Ra3 Qa3 26.Rf2 Rb8 (26...Qg3 27.Kf1 Bh4 28.Qf3 Bf3 29.Rf3 Qf3 30.Kg1 Bf2 31.Kf1 Bd4 32.Ke1 Bc3) 27.Qe2-+ Bd3 (better 27...Qg3 28.Rg2 Bg2 29.Qf2 Qf2 30.Kf2-+) 28.Qf3 f6 29.Qd5 Kf8 30.Kh2 Bh7 (30...Rb5 31.Qg2-+) 31.b6 Rb6 32.Qe6 Bg8 (32...Rb2 33.Qc8 Kf7 34.Qe8 Ke8 35.Rb2 Qb2 36.Kg1 Qe2 37.g5 Be4 38.gf6 Qg2) 33.Qc8 Kf7 34.g5 hg5 35.Qg4 Qe3 (35...Rb2!? 36.Kg2-+) 36.Rg2 Qf4 (36...Qf4 37.Qg3 Rb3 38.Qf4 gf4-+) 0–1. nando (2115) – workchess (2270), net–chess.com, 2016.

3.e4 Ne4 4.Qe2 d5 5.d3 Nf6 6.Qe5 Be6 7.Bb2 c5 8.bc5 Bc5 9.Qf4 Ng4 10.Nh3 0-0 11.Be2 Re8 12.Qg3 Qb6 13.Bc1 -+.

3.f3 b5 4.Bb2 Bd6 (4...Nc6!?=) 5.e4+= 0-0 6.Bb5 a6 7.Bc4 Bb7 8.d3 Nc6 (8...a5 9.b5+=) 9.c3 (9.Ne2 Rb8+/-) 9...h6 (9...Be7 10.Ne2=) 10.Nd2 Ne7 (10...Be7 11.d4+=) 11.Qb3 (11.Ne2 Ng6+/-) 11...Rb8 (11...Ng6 12.Nh3+/-) 12.g4 (better 12.Ne2+/-) 12...g5? (12...Ng6 13.h4+=) 13.d4 (13.h4 gh4 14.Rh4 Kg7+-) 13...ed4 (13...Ng6 14.Ne2+/-) 14.cd4+- Bf4 15.0-0-0 (15.d5!? Ng6 16.Ne2+-) 15...d6 (15...d5 16.ed5 a5 17.Ne2 Ned5 18.b5=) 16.Kb1 (16.d5 Ng6+/-) 16...Nc6 (16...d5 17.ed5 a5 18.Ne2 Bd2 19.Rd2 ab4 20.ab4 Bd5 21.Rc2=+) 17.Qa2 (17.d5 Ne5 18.h4 a5 19.hg5 Bg5+/-) 17...Be3 (17...Bd2 18.Rd2 Ne4 19.Re2+= (worse 19.fe4 Nb4 20.ab4 Be4 21.Kc1 Bh1=+)) 18.Qa1 (better 18.d5!? Ne5 19.h4+/-) 18...d5+= 19.ed5 Nd5 20.Nb3 (better 20.Ne4 Nce7 21.h4+=) 20...Qf6?? (better 20...Nb6 21.Bd3 Na4=) 21.Bd5+- Rbd8? (21...Na5 22.Bc1 (22.Na5?! Qg6 23.Be4 Be4 24.fe4 Qe4 25.Ka2 Qh1+=; 22.ba5? Bd5 23.Nc5 Qg6 24.Rd3 Bd4-+) 22...Bd5 A) 23.Be3 Qg6 24.Kb2 Nc4 (worse 24...Nb3 25.Qb1=+) 25.Kc3 Ne3-+; B) 23.Na5 Bg1 24.Rhg1 (24.Rdg1?! Qg6 25.Kb2 Bf3+=) 24...Bf3 25.Qc3 Qg6 26.Ka1 Bd1 27.Rd1+-) 22.Bc6 (better 22.Be4 Qd6 23.Nh3+-) 22...Bc6 23.d5 (better 23.Ka2 Bd5 24.Rd3+-) 23...Qg6+/- 24.Ka2 Ba4? (better 24...Bd5 25.Rd5 Rd5+/-) 25.Qb1+- Qb6 (25...Qb1 26.Rb1 Rd5 27.Re1+-) 26.Ne2 (26.h4!? gh4 27.Qd3 Rd6+-) 26...a5 27.Nc3 (27.Nc3 Bb3 28.Kb3 ab4 29.ab4+-) 1-0. Delboy Smith (1690) - gaspo5 (1660), ChessWorld.net, 2009.

3.f3 c5 4.Nc3 cb4 5.ab4 Bb4 6.Na4 0-0 7.c3 Ba5 8.e4 d5 9.Ne2 de4 10.Ba3 ef3 11.Bf8 Kf8 12.Ng3 f2 13.Ke2 Bg4 14.Kf2 Bd1 15.Rd1 Ng4 16.Ke1 Nc6 17.h3 Qh4 18.Be2 Qg3 19.Kf1 Qf2 Normal 0-1. Spoileur – clakos, Rated Classical game, lichess.org, 2015.

3.f3 Bd6 4.e3 0-0 5.g3 (5.Nc3 c5-/+) 5...e4 (5...c5 6.b5-/+) 6.f4 (6.Bb2!? Be7 7.Nc3=+) 6...c5-/+ 7.b5 a6 8.a4 (8.Nc3-/+) 8...Nd5 (better 8...ab5!? 9.Bb5 Nc6-+) 9.c4 Nb4 10.Be2 (10.Bb2!?-/+) 10...ab5-+ 11.cb5 Qf6 (11...Be7!? 12.Nh3-/+) 12.Nc3-/+ Nd3 (12...Qe6!?-/+) 13.Kf1 (13.Bd3 ed3 14.Nf3=) 13...Nc1 (better 13...c4!?=+) 14.Rc1+= Qe6 15.b6 (better 15.d3 ed3 16.Qd3+=) 15...Nc6 16.Nb5 Nb4 17.Bc4 Qf6 (better 17...Qg6 18.Ne2 Be7-/+) 18.Nc7? (better 18.Ne2=+) 18...Bc7-+ 19.bc7 d5 20.Bb5 c4 21.Ne2 (21.Qh5 Nd3 22.Rc3 Qd6-+) 21...Bh3 22.Kf2 (22.Kg1 Nd3-+) 22...Nd3 23.Kg1 Nc1 24.Qc1 Qb6 25.Nc3 Be6 (25...Qc7 26.Nd5 Qd6 27.Nc3-+) 26.Kg2 (better 26.f5 Bf5 27.Nd5-+) 26...Qc7 27.h4 (27.Rf1 Qc8 28.Kg1 Rd8-+) 27...Bg4 28.h5 (28.Re1-+) 28...Bf3 29.Kf2 Bh1 30.Qh1 Rfd8 31.h6 (31.Ne2 Rd6-+) 31...f5 (31...d4 32.Ne2 c3 33.ed4-+) 32.Qh5 (32.Qh3 g6 33.Qh4 Kf7-+) 32...g6 (32...Qf7 33.Qf7 Kf7 34.hg7-+) 33.Qg5 (33.Qh4-+) 33...Qb6 (better 33...Kf7 34.g4 Qe7 35.gf5 Qg5 36.fg5 gf5-+) 34.Qe7 Qd6 (34...Qe3 35.de3 Rd7 36.Bd7 Ra4 37.Qg7) 35.Qg7 1-0. Paul593 - Larry Larry (1675), ChessWorld.net, 2020.

3.f3 g6 4.Bb2=+ d6 5.g4?? (5.e4!?=) 5...Bg7?? (5...Ng4!? 6.e4 Qh4 7.Ke2 Qf2 8.Kd3 Nh2 9.Nc3-+) 6.e4? (6.h4 Be6=+) 6...0-0 (better 6...Ne4!? 7.Ke2 Nf6-+) 7.h4 a5 (7...Be6 8.h5=+) 8.ba5 Ra5 9.Nc3 d5 10.ed5 Nd5 11.Ne4 f5 12.gf5 Bf5 (12...gf5 13.Ng3=+) 13.c4 (13.h5 g5=+) 13...Nf4-/+ 14.Qb3 b6 15.Bc3 Ra8 16.a4 (16.c5!? Kh8 17.cb6 cb6 18.Ng5-/+) 16...Nc6 (16...Be4 17.fe4 Nd3 18.Bd3 Qd3 19.Ne2 Qe4 20.Rg1 Qh4 21.Kd1-+) 17.Ng5 (17.c5 Kh8 18.cb6 cb6-+) 17...Nd4 18.Bd4 Qd4 (18...ed4?! 19.c5 Kh8 20.Nf7 Rf7 21.Qf7-/+) 19.Qc3 Qc3 20.dc3 Rfd8 (20...e4 21.Ra3-+) 21.Ra3? (21.c5 Nd3 22.Bd3 Rd3-+ (22...Bd3?! 23.Ne6-/+)) 21...Rd6 (better 21...Bc2!? 22.Be2-+) 22.Ne4 (22.c5 Nd3 (worse 22...bc5 23.Bc4 Kf8 24.Nh7 Ke7 25.Ng5=+) 23.Bd3 Rd3 24.cb6 cb6-+) 22...Be4 23.fe4 Rad8 24.Ra1 Rd2 (24...Ne6 25.h5-+) 25.Nf3 (better 25.c5!?-/+) 25...Rc2-+ 26.a5 Rc3 27.Nd2 (27.Kf2 Rc2 28.Kg1 ba5-+) 27...ba5 28.Kd1 (28.Rh2 a4-+) 28...Re3 (better 28...Nd3!? 29.Bd3 Rcd3 30.Rh2-+) 29.Ra5 Re4 30.Kc2 (30.Rh2 Red4-+) 30...Re3 (better 30...Re1 31.h5-+) 31.Rh2 (31.c5-+) 31...e4 32.Rf2 (32.Kd1-+) 32...Rc3 33.Kd1 e3 34.Rf4 (34.Rh2-+) 34…Rd2 (34...Rd2 35.Ke1 Rc1) 0-1. Delboy Smith (1800) - shapao (1815), ChessWorld.net, 2009.

3.Nf3 Nc6 4.h3 (4.b5 Nd4=) 4...Bd6 (4...e4 5.Nh2-/+) 5.Nc3 (5.d3 0-0=) 5...0-0 (5...e4 6.Nh2-/+) 6.e3 (6.e4 a5 7.b5 Nd4=) 6...e4=+ 7.Nh2 Be5 8.Be2 d5 9.f3 (9.Ng4!?-/+) 9...d4 10.f4 Bd6 (10...dc3!? 11.fe5 Nd5-/+) 11.Nb5 Nd5 12.0-0 d3 (better 12...a6 13.Nd4 Nd4 14.ed4 Nf4-/+) 13.cd3+= ed3 14.Bd3 Bh3?? (better 14...a6 15.Nd6 Qd6+/-) 15.gh3+- (15.Nd6?! Qd6 16.gh3 Ndb4+-) 15...Qh4 (15...a6 16.Nd6 Qd6 17.Qc2+-) 16.Qf3 Rad8 17.Qd5 (17.Bb2 a6 18.Nd4 Nd4 19.Bd4 Be7+-) 17...Bf4? (17...Be5 18.Qg2 (18.fe5? Rd5 19.Be2 Re5-+) 18...Ba1 19.Be4+-) 18.Qg2 (better 18.Rf4 Qf4 (18...Rd5?? 19.Rh4 Rd3 20.Nc7+-) 19.Qc6 Qg5 20.Qg2 Qg2 21.Kg2 Rd3+-) 18...Rd3 (18...Bh2 19.Kh2 Rd3 20.Bb2+-) 19.Nf3 (better 19.Rf4 Qe7 20.Bb2+-) 19...Qf6 20.Rb1 (20.ef4?! Qa1 21.Qe2 Rd7+=) 20...Re8 (20...Rd5 21.Nc3 Be3 22.Kh1 Rh5 23.de3 Qe6+-) 21.Bb2 (21.ef4 Qf5 22.Bb2 f6+-) 21...Qd8 (21...Be3 22.de3 Qh6+-) 22.Qg7 1-0. tempus_fugit – Bralle, Rated Classical game, lichess.org, 2015.

3.Nf3 Qe7 4.e3 d5 5.Bb2 Nc6 6.Bb5 e4 7.Nd4 Bd7 8.h3 g6 9.c4 Bg7 10.cd5 Nd5 11.Bc4 Qg5 12.g3 0-0 13.h4 Qe7 14.h5 Nb6 15.hg6 Nc4 16.gh7 Kh8 17.Nc6 Bc6 18.Bg7 Kg7 19.h8Q Rh8 20.Qg4 Kf6 21.Qf4 Kg7 22.Qg4 Kf6 23.Qf4 Ke6 24.Rh6 Rh6 25.Qh6 Kd7 26.Qh3 Kd6 27.Nc3 Qf6 28.0-0-0 Na3 29.g4 Rh8 30.Qg3 Ke7 31.Qc7 Kf8 32.Qb8 Kg7 33.Qa7 Nc4 34.Qc5 Ne5 35.Rg1 Nd3 0-1. tempus_fugit – SubMarcos, Rated Classical game, lichess.org, 2015.

3.g3 c6 4.f3 d5-/+ 5.Bg2 (5.e3 Bd6-/+) 5...Be6 6.Nh3 h6 (6...Bd6 7.Ng5-/+) 7.0-0 Nbd7 (7...a5 8.f4 Bh3 9.Bh3 ef4 10.Rf4 ab4 11.Bb2 ba3 12.Bf6 gf6 13.Rf3-/+) 8.d4 (8.f4!? Qb6 9.Kh1=+) 8...ed4 9.Qd4 b6 (better 9...c5!? 10.Qd2 cb4-/+) 10.Nf4= c5 11.Qd3 (11.Qd2=) 11...c4 (11...cb4 12.Ne6 fe6 13.Qg6 Ke7 14.f4=+ (14.ab4?? Ne5 15.Qf6 gf6-+)) 12.Qd4 (better 12.Qe3 Qe7 13.Nc3+=) 12...Bf5?? (better 12...a5!? 13.Bd2 Bd6 14.Ne6 fe6=+) 13.Nd5 (13.e4!? Bh7 14.Nd5+-) 13...Nd5 14.Qd5 Bc2 15.f4 (15.Bb2!? b5 16.Rc1 Bb1 17.Bh3+-) 15...Rc8= 16.Nc3 Bg6 (better 16...Nf6!? 17.Qe5 Qe7 18.Qb5 Qd7+=) 17.Nb5+/- Be7 (better 17...Qf6!?+/-) 18.Na7+- Rc7 19.Nb5 Rc8 20.Be3 (20.f5!? Bh5 21.Na7 Rc7+-) 20...0-0 21.Rad1 c3? (21...Nf6 22.Qd8 Rcd8 23.Rc1+- (23.Bb6?! Rd1 24.Rd1 Rb8+=)) 22.Qb7 (better 22.Qd7 c2 23.Qd8 Bd8 24.Rc1+-) 22...Bf5 23.Rc1 (23.Bc6 Rc6 24.Qc6 c2+-) 23...c2 (23...Bf6 24.Nd6 Rb8 25.Qd5+- (25.Nf5?! Rb7 26.Bb7 Qc7=)) 24.Nd4+- Bg6? (better 24...Rc7 25.Qf3 Bh7+-) 25.f5 Bh5 (25...Rc7 26.Nc6 Rb7 27.Nd8 Rd8 28.Bb7 Bh5 29.Rc2 Bf6+-) 26.Rfe1 (better 26.Nc6 Bg5 27.Bg5 (27.Nd8?! Be3 28.Kh1 Rfd8+/-) 27...Qg5 28.Qd7 Be2 29.Rc2 Bf1 30.Ne7 (30.Bf1?! Qe3 31.Rf2 Rfd8+-; 30.Kf1?! Rce8+-) 30...Kh7 31.Rc8 Bg2 32.Kg2+- (32.Rf8?! Qe3 33.Kg2 Qe2 34.Kh3 Qh5 35.Kg2 Qe2 36.Kg1 Qe1 37.Kg2 Qe2=)) 26...Rc7 27.Qe4 Qc8? (27...Nf6 28.Qd3 Rd7 29.Bc6+/-) 28.Nc2 (better 28.Qe7!? Re8 29.Qh4 Re3 30.Qh5 Nf6+-) 28...Bf6 29.Bf4 (29.Nd4 Ne5+-) 29...Rc3 (29...Re8 30.Qd3 Be5 31.e4+/-) 30.Nd4 Rc1 (30...Rc4 31.Rc4 Qc4 32.Rd1+-) 31.Rc1 (31.Bc1?! Re8 32.Qd5 Ne5+/-) 31...Qa6 32.Bf1 (better 32.Rc7!? Bd4 33.Qd4 Nf6 34.Bh6 Ne8+-) 32...Qa3+/- 33.Nc6 Qb2?? (33...Bb2 34.Rc2 Nf6 35.Qd3+-) 34.Ne7 (better 34.Rd1+-) 34...Kh7 (34...Be7 35.Qe7 Nf6 36.Rd1+/-) 35.Nd5 (better 35.Rd1!? Rd8 36.Nd5+-) 35...Bd4+= 36.e3 Qc1 37.ed4 (worse 37.Qd4 Be2 38.Qg7 Kg7 39.f6 Kh7 40.h4 Qf1 41.Kh2 Bf3 42.Nb6 Qg2) 37...Qd1 38.f6 (better 38.Ne3!? Qd2 39.Qd3 Qd3 40.Bd3=) 38...Bg6=+ 39.Qe3 Nf6 40.Nf6 gf6 41.Bh6? (better 41.Qd2 Qd2 42.Bd2=+) 41...Kg8?? (better 41...Ra8 42.Qd2 Ra1 43.Qd1 Rd1-+) 42.Qf2?? (better 42.Bf8 Kf8 43.b5+-) 42...Re8?? (42...Rd8 43.Be3 Bd3 44.Qf6 Rd5-+) 43.Qf6 Qd4 (43...Qf1 44.Kf1 Bd3 45.Kg2 Re2 46.Kf3 Be4 47.Ke2 Bf3 48.Kf3 b5 49.Qg7) 44.Qd4 f6 45.Qb6 (45.Qf6 Re7 46.Qe7 Bf7 47.Qf8 Kh7 48.Qg7) 45...Re7 46.Qf6 (46.Qf6 Rf7 47.Bc4 Kh7 48.Bf7 Bf7 49.Qg7) 1-0. souleater99 – antifascista, Rated Classical game, lichess.org, 2014.

3.g3 Be7 4.Bg2 0-0 5.Nf3 Nc6 6.0-0 Bd6 7.c3 Ne7 8.d3 c6 9.Nbd2 b6 10.Bb2 Bc7 11.c4 d6 12.Ne4 Ne4 13.de4 Ng6 14.Qb3 Kh8 15.Rfd1 f5 16.ef5 Bf5 17.Ne5 Ne5 18.Be5 Qe7 19.Bc3 Qe2 20.Re1 Qh5 21.Qb2 Rg8 22.Re7 Qg6 23.Rc7 Rac8 24.Ra7 Ra8 25.Rc7 Rac8 26.Rc6 Rc6 27.Bc6 Be4 0-1. nookieee (1680) – kikamelo, Rated Blitz tournament, lichess.org, 2014.

3.h3 a5 4.b5 d5 5.e3 a4 6.Nf3 Nbd7 7.c4 (7.d4 e4 8.Nfd2 c6=+) 7...dc4 8.Bc4 Nb6 9.Ne5 (9.Ba2 Bd6=+) 9...Nc4-/+ 10.Nc4 Qd5 11.d3? (better 11.Qe2!? Qg2 12.Qf1 Qf1 13.Kf1-/+) 11...Qg2-+ (11...Qb5?! 12.Bb2=) 12.Rf1 (better 12.Kd2 Bh3 13.Qg1-+) 12...Bh3 (12...Qh3?! 13.Bb2-/+) 13.Nbd2 Rd8 (13...Ng4!? 14.Qf3 Qf3 15.Nf3 Bf1 16.Kf1-+) 14.Qe2 (14.Bb2 Ng4 15.b6 c6 (15...Rd3 16.bc7 Nh2 17.Qa4 Ke7 18.Qb4 Kd7 19.Qb5 Kc7 20.Be5 Kd8 21.Bh2 Qh2 22.Ne5 Rd2 23.Kd2+-) 16.Qa4 Nh2-+) 14...Bg4 (better 14...Ng4 15.Kd1 Qh2-+) 15.Nf3?? (better 15.f3 Qg3 16.Rf2-+) 15...Bf3 16.Qc2 Be7 (better 16...Ng4 17.e4 Nh2 18.Ne3-+) 17.Ne5 (17.b6 cb6 18.e4 b5-+) 17...Bd5 (17...Ng4 18.Nf3 Qf3 19.b6-+) 18.Bb2 Bb3 19.Qc6 (19.Qc7 Nh5 20.Nc4 Rd3 21.Bd4-+) 19...Kf8 (better 19...bc6 20.bc6 Nh5-+) 20.Qc7 (better 20.Qg2 Bd5 21.e4+-) 20...Bd5 (better 20...Ne8!? 21.Qa5-+) 21.0-0-0 (21.Qa5 Nh5 22.Bc3 Bb3-+) 21…Be6 (21...Be6 22.Kb1 Qd5-+) 0-1. caraku123 - Daihatsu (1770), Rated Blitz tournament, lichess.org, 2014.

3.h3 c5 4.c3 cb4 5.cb4 a5 6.Bb2 ab4 7.ab4 Ra1 8.Ba1 Qb6 (8...Nc6!? 9.b5 Qa5 10.bc6 Qa1 11.cb7 Bb7-/+) 9.Be5= Nc6 (9...Ne4 10.e3 Nc6 11.Bc3 Nb4 12.Nf3=) 10.Bf6+= gf6 11.e3 Bb4 12.Qc2 d5 13.Bd3 h6 14.Nf3 Ne5?? (better 14...Rg8 15.Bf1 f5+=) 15.Qc8+- Qd8 (15...Ke7 16.Qh8 Nd3 17.Ke2+-) 16.Bb5 Ke7 17.Qb7 Ke6 (17...Kf8 18.Nd4+-) 18.Nd4 Kd6 19.Qa6 (19.f4 Rh7 20.Be2 Bd2 21.Kd2 Nc4 22.Bc4 dc4 23.Nc3 Qa5 24.Ra1 Rh8 25.Ra5 Rd8 26.Rd5) 19...Kc5 (19...Ke7 20.f4 Qc8+-) 20.0-0 (20.Nb3) 20...Qa5 21.Nb3 1-0. Aleksandar2 - mirumen (1640), Rated Blitz game, lichess.org, 2015. (=1.a3 e5 2.b4 Nf6)

3.h3 c6 4.Bb2 d6 5.e3 Bf5 6.Nc3 d5 7.g4 Bg6 8.Nf3 e4 9.Ne5 Bd6 10.g5? (10.Ng6 hg6 11.d3 g5=) 10...Nfd7 (better 10...Be5!? 11.gf6 Qf6-+) 11.Ng6=+ hg6 12.h4 0-0 (12...b5 13.d3 ed3 14.cd3=) 13.Qe2 (13.f4 ef3 14.Qf3 Re8=) 13...f6 (13...b5 14.f3 ef3 15.Qf3=) 14.b5 (14.h5 f5=) 14...fg5 15.h5 cb5?? (15...Qe8!?=) 16.Nb5 (16.hg6 Rf3 17.Ne4 de4 18.Qb5 Qc7 19.Qd5 Kf8 20.Qe4 Be5 21.Qf3 Ke7 22.Qf7 Kd6+-) 16...Be7? (better 16...Ne5 17.Be5 Be5 18.hg6 Rf3+/-) 17.hg6+- Qe8?? (17...Rf3+-) 18.Qh5 (18.Rh8 Kh8 19.Qh5 Kg8 20.Qh7) 18...Rf6 19.Qh7 (19.Qh8) 19...Kf8 20.Qh8 1-0. hrom - footballer2, Rated Classical game, lichess.org, 2014. (=1.a3 A00: Irregular Openings 1...e5 2.b4 Nf6)

3.h3 Nc6 4.e3 d5 5.Bb2 d4 (5...Bd6 6.c4=+) 6.Nf3 (6.b5 Nb8 7.ed4 ed4 8.Nf3=) 6...e4 (better 6...de3 7.de3 Qd1 8.Kd1 Ne4=) 7.ed4?? (better 7.Nd4 Nd4 8.Bd4+/-) 7...ef3-+ 8.Qf3 g6?? (better 8...Nd4 9.Qc3 Qe7 10.Kd1 Ne6-+) 9.d5+/- Bh6?? (better 9...Qe7 10.Kd1 Ne5 11.Bb5 Kd8+/-) 10.Bf6+- Nd4 (10...Ne5 11.Bb5 Kf8 12.Be5 Bg7+-) 11.Qe4 (11.Bd8?! Nf3 12.gf3 Kd8+=) 11...Ne6 12.Bd8 (12.de6?! Qf6 13.ef7 Kf7 14.Qc4 Ke8+-) 12...Bd7 13.de6 Be6 14.Bc7 0-0 15.Be2 Rae8 16.Qb7 (better 16.Bd6 Bg7 17.c3 f5 18.Qb7 Rf7+-) 16...Re7 17.0-0 (better 17.Nc3 Bg7 18.Qa7 Rc8+-) 17...Rd8 18.Qc6 (better 18.Qe4 Rc7 19.Qh4 Rdd7 20.Qh6 Rc2+-) 18...Bd5 19.Qc3 (better 19.Bd8 Bc6 20.Be7 Be4+-) 19...Bg7 20.Qg7! Kg7 21.Bd8 Re8 22.Nc3 (better 22.Bg5 Re2 23.Nc3 Re5+-) 22...Bc6 23.Bc7 Re6 1-0. hrom - mich23, Rated Classical game, lichess.org, 2014. (=1.a3 A00: Irregular Openings 1...e5 2.b4 Nf6)

3.Bb2 (--> 1.b4 e5 2.Bb2 Nf6 3.a3).

3.Bb2 Nc6 4.e3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 Nc6 4.a3 e5).

3.Bb2 Nc6 4.e3 d6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Nc6).

3.Bb2 d5 (--> 1.b4 e5 2.a3 d5 3.Bb2 Nf6).

3.Bb2 d5 4.e3 e4 (--> 1.b4 e5 2.Bb2 e4 3.e3 d5 4.a3 Nf6).

3.Bb2 Qe7 (--> 1.b4 e5 2.Bb2 Qe7 3.a3 Nf6).

3.Bb2 g6 (--> 1.b4 e5 2.a3 g6 3.Bb2 Nf6).

(---> 1.b4 e5 2.Bb2 Nf6 3.a3 d6)

4.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.a3).

4.c4 Nbd7 5.e3 Be7 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 Nbd7).

4.c4 Be6 5.e3 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.a3).

4.c4 Be6 5.e3 Be7 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 Be6).

4.c4 Be7 5.e3 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4).

4.c4 Be7 5.Nf3 0-0 6.e3 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 0-0 6.Nf3).

4.c4 Bf5 5.e3 Be7 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 Bf5).

4.e3 Be6 5.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.a3).

4.e3 Be6 5.c4 Be7 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 Be6).

4.e3 Be6 5.Nf3 (--> 1.b4 e5 2.Bb2 d6 3.e3 Be6 4.Nf3 Nf6 5.a3).

4.e3 Be7 5.Be2 0-0 6.c4 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 0-0 6.Be2).

4.e3 Be7 5.Nf3 0-0 6.c4 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 0-0 6.Nf3).

4.e3 g6 5.Nf3 Bg7 6.d3 0-0 7.Be2 a5 8.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d6 6.Be2 e5 7.d3 a5 8.a3).

4.Nf3 Be6 5.e3 (--> 1.b4 e5 2.Bb2 d6 3.e3 Be6 4.Nf3 Nf6 5.a3).

4.Nf3 Be7 5.e3 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.Nf3).

4.g3 Nc6 5.Bg2 (--> 1.b4 e5 2.Bb2 d6 3.g3 Nf6 4.Bg2 Nc6 5.a3).

4.g3 Be6 5.Bg2 Nc6 (--> 1.b4 e5 2.Bb2 d6 3.g3 Nf6 4.Bg2 Nc6 5.a3 Be6).

4.g3 Be7 5.Bg2 (--> 1.b4 e5 2.Bb2 d6 3.g3 Nf6 4.Bg2 Be7 5.a3).

4.c4 (--> 1.b4 e5 2.Bb2 e4 3.c4 Nf6 4.a3).

4.c4 c6 5.e3 d5 (--> 1.b4 e5 2.Bb2 e4 3.e3 d5 4.a3 Nf6 5.c4 c6).

4.d3 d5 (--> 1.b4 e5 2.Bb2 e4 3.a3 d5 4.d3 Nf6).

4.d3 d5 5.de4 Ne4 6.Nd2 (--> 1.b4 e5 2.Bb2 e4 3.a3 d5 4.d3 Nf6 5.de4 Ne4 6.Nd2).

4.Bb2 d6 5.e3 a6 6.c4 ab5 7.cb5 0-0 8.Be2 b6 9.d4 ed4 10.ed4 Bb7 11.Nf3 Ne4 12.0-0 d5 13.dc5 Nc5 14.Qd4 f6 15.Ng5 Qe7 16.Bg4 Nb3 17.Be6 Kh8 18.Qd3 fg5 19.Qb3 Qe6 20.Qc3 Qf7 21.Nd2 Nd7 22.Qc7 Nc5 23.Qb6 Nd3 24.Bd4 Nf4 25.Rfe1 Nd3 26.Re6 Rae8 27.Re8 Re8 28.g3 Bc8 29.Qc6 Bh3 30.b6 Rc8 31.b7 Rc6 32.b8Q Rc8 33.Qb5 Nc1 34.a4 h6 35.a5 Kh7 36.a6 Qe8 37.Qe8 Re8 38.Rc1 Ra8 39.a7 Kg6 40.f3 Kh5 41.Kf2 g6 42.g4 Kh4 43.Kg1 h5 44.Bf2 Normal 1-0. lbauchwitz (1740) - palobiely (1700), Rated Classical game, lichess.org, 2015. (=1.a3 e5 2.b4 Nf6)

4.Nf3 Ng4 (4...d5!? 5.e3 e4-/+) 5.e3= d6 (5...0-0 6.h3 Nf6 7.Ne5+=) 6.h3 (6.d4 ed4 7.ed4 Bb6+=) 6...Nf6= 7.Bc4 (7.d4 ed4 8.ed4 Bb6=) 7...0-0 (7...e4 8.Nd4=+) 8.d4= ed4 9.ed4 Bb6 (9...Re8 10.Be3 Bb6=) 10.Bg5 (10.0-0!?=) 10...Re8=+ 11.Kf1 (11.Be3 d5 12.Bd3 c5 13.dc5 Bc5-/+) 11...Bf5 (11...h6 12.Bf6 Qf6 13.Nc3-/+) 12.Bf6 (12.Nc3 Ba5 13.Bf6 Qf6=+) 12...Qf6-/+ (12...gf6?! 13.Nh4 Bg6 14.Nc3=) 13.g4?? (better 13.Nc3!? c6 14.Rb1-/+) 13...Be4 (better 13...Bc2 14.Qc2 Qf3-+) 14.g5?? (14.Nbd2 d5 (14...Bd4?! 15.Ne4 Re4 16.Bd3 Ba1 17.Be4=) 15.Be2 Nd7-+ (15...Bd4?! 16.Ne4 Re4 17.c3 Bc3 18.Qd5 Re2 19.Ke2 Qe7 20.Kd3=+)) 14...Qf4 (better 14...Qf3 15.Qf3 Bf3-+) 15.Nbd2 Nd7 (15...Bd4 16.Rb1 Bg6 17.Bd5-+) 16.Rg1 (better 16.Ne4 Re4 17.Ra2-/+) 16...c6?? (better 16...Bf5 17.Rg3 Bd4 18.Nd4 Qd4-+) 17.Rg4+– Qf5 18.Ne4 (worse 18.Re4 Re4 19.Ne4 d5=+ (worse 19...Qe4 20.Qd3 d5 21.bc6 bc6 22.Re1=)) 18...Re4 19.Bd3 (better 19.Nh4 Qg4 20.hg4 Rd4 21.Bd3+–) 19...d5+– 20.Be4 (20.bc6 bc6 21.c3 Rae8+–) 20...de4+= 21.Nh4 Qe6 (21...Qd5 22.bc6 bc6 23.Qe2+=) 22.Qe2 (22.bc6 bc6 23.Kg1 f5+=) 22...Bd4? (better 22...f5 23.Nf5 Qf5 24.bc6 bc6 25.Qe4 Qb5 26.Kg1 Nf8=) 23.Re4?? (better 23.Rd1 Bb6 24.bc6+–) 23...Qh3-+ 24.Ng2 (24.Kg1 Ba1 25.bc6 bc6 26.Qf3 Qf3 27.Nf3-+) 24…Qh1 0–1. pumpkin516 – dariopa, gameknot.com, 2018.

4.d4 e4 5.e3 d5 6.g3 Bg4 7.Be2 h5 8.Bg4 Ng4 9.h3 Nf6 10.f4 ef3 11.Qf3 Qe7 12.h4 Ne4 13.Qg2 f6 14.Ne2 0-0-0 15.Nf4 g5 16.Ng6 Qg7 17.Nh8 Qh8 18.hg5 Ng5 19.Nd2 Bh6 20.Nf1 Re8 21.Bd2 Ne4 22.0-0-0 f5 23.Rh4 Ng5 24.Rf4 Ne6 25.Qd5 Nf4 26.ef4 b6 27.Qf5 Kb8 28.Qh5 Ne7 29.Qe2 Nf5 30.Qd3 Ng3 31.Ng3 Bf4 32.Qf3 Re1 33.Re1 Qd4 34.Ne2 c5 35.Nd4 Time forfeit 1-0. Knulpilvagabondo – chillillo, Rated Bullet game, lichess.org, 2016. (=1.a3 e5 2.b4 Nf6)

4.e3 d5 5.d4 e4 6.f4 ef3 7.gf3 Bd6 8.Nh3 0-0 9.Nf4 Re8 10.Rg1 Bf4 11.Bb5 Be3 12.Be3 Re3 13.Kf2 Qe7 14.Rg7 Kg7 15.Qg1 Kf8 16.Nd2 Re2 17.Kg3 Rd2 18.Rf1 Nh5 0-1. eddiesoria97 - ziua_vine (1670), Rated Blitz tournament. lichess.org. (=1.a3 e5 2.b4 Nf6)

4.e4 Ne4 5.f3 Nf6 6.g4 d6 7.h3 Be7 8.Bd3 0-0 9.Ne2 Nd5 10.0-0 Bh4 11.a4 Nf4 12.Nf4 ef4 13.a5 Ne5 14.Na3 Nd3 15.Qc2 Ne5 16.Bb2 Be6 17.Rae1 Bc4 18.Nc4 Nc4 19.Qb3 Nd2 20.Qc2 Nf1 21.Rf1 Qe7 22.Bc1 Qf6 23.Qe2 Bg3 24.Qc4 Qh4 25.Bf4 Qh3 26.Bg3 Qg3 27.Kh1 c6 28.Rg1 Qf3 29.Rg2 Rfe8 30.Qd4 Re1 31.Kh2 Re2 32.Re2 Qe2 33.Kh3 d5 34.Qg1 Qf3 35.Qg3 Qg3 36.Kg3 Re8 37.g5 Re3 38.Kg4 Rc3 39.g6 hg6 40.Kf4 Rc4 41.Ke5 Rb4 42.Kd6 Rb6 43.Kc7 Rb5 44.Kb8 a6 45.Ka7 g5 Normal 0-1. zdubair - inkt2002, Rated Blitz game, lichess.org, 2015.

4.Bb2 d6 5.h3 h6 6.e4= g6 7.Nf3. CODD – gurvinder372, internet, 2007.

4.d4 ed4 5.Qd4 Nc6 6.Qf4 Bd6 7.Qe3 Qe7 8.Qd2 0-0 9.Nf3 Be5 10.Nd5 Nd5 11.Qd5 Ba1 12.Bg5 Qe6 13.Qd3 Bf6 14.h4 Bg5 15.Ng5 Qg6 16.Qg3 d6 17.h5 Qc2 18.e3 Be6 19.h6 Qc1 20.Ke2 Bc4 21.Kf3 Bf1 22.Nh7 g6 23.Nf6 Kh8 24.h7 Be2 25.Ke2 Qh1 26.f4 Kg7 27.f5 Kf6 28.fg6 Qh5 29.Qf3 Qf3 30.gf3 fg6 0-1. Gibek91 - Teh42 (1645), Rated Classical game, lichess.org. (=1.a3 e5 2.b4 Nf6)

4.Bb2 d5 5.e3=+.

4.Bb2 d6 5.Ra2 (5.e4 Nbd7=) 5...Be6 6.Ra1 d5 7.d4 e4 8.e3 Ng4 9.f3? (better 9.Be2!? Qg5 10.h4=+) 9...Ne3-+ 10.Qd2 Nf1 11.Kf1 ef3 12.Nf3 Na6 13.Kf2 Qf6 14.Rae1 0-0-0 15.Re3 (15.b5 Nb8-/+) 15...c5 16.bc5 (16.dc5 d4 A double attack) 16...Nc5 17.Rhe1 g5?? (17...Na6 18.Nb5 Kb8 19.Kg1=+) 18.Kg1 (18.dc5 d4 19.Re6 dc3 20.Rf6 cd2+-) 18...Bh6?? (better 18...g4 19.dc5 gf3 20.Rf3 Qh4=) 19.Qe2?? (better 19.dc5 g4 20.Nd4+-) 19...g4-/+ 20.Ne5 Be3 21.Qe3 Nd7?? (21...Qf5!?-/+) 22.Rf1 (better 22.Nb5!? Ne5 23.de5+=) 22...Qg7=+ 23.g3? (23.Nb5 Ne5 24.de5=) 23...f6 (23...Ne5 24.Qe5 Qe5 25.de5-+) 24.Nd7 (24.Nb5 fe5 25.Qc3 Kb8 26.Qc7 Ka8 27.Qa5=) 24...Rd7?? (better 24...Kd7 25.Qd3 Rhe8-+) 25.Qe6+- Qg5 (25...Qg6 26.Nb5 f5 27.Nd6 Kc7 28.Qe5+-) 26.Re1 (26.Nb5 Kd8 27.Bc1 Qg7 28.Na7 Re8 29.Qb6 Ke7+-) 26...Qd2 (26...Qg8 27.Qf6 Qd8 28.Qe6+-) 27.Nb5 (27.Na4!? Rhd8 28.Nc5 h6+-) 27...Qa5 28.Nc3 Qd8? (better 28...Qb6 29.Qb6 ab6+-) 29.Nd5 (worse 29.Qg4 Kb8+-) 29...Kb8 30.Nf6 (better 30.c4+-) 30...Rd6 31.Qg4 (31.Qe5 Qf6 32.Qf6 Rf6+-) 31...Rf6? (better 31...Qf6 32.Rf1 Qe7+=) 32.d5!+- Rg6 (32...Qd5 Theme: Deflection from f6 33.Bf6) 33.Qf4 Ka8 34.Bh8 Qh8 35.Qe5 Threatening mate... how? 35...Qc8 36.Qe8 The mate threat is Qxc8 36...Kb8 37.Qc8 Kc8 38.c4 Kd7 (38...Rg4 39.c5+-) 39.Kg2 (39.c5!? Ra6 40.Re3 Ra5+-) 39...Kd6 40.Re6 (40.Kf3!? Kc5+-) 40...Re6 41.de6 Ke6 42.g4 (42.Kf3!?+-) 42...Ke5+/- 43.Kf3 Kd4 44.Kf4 Kc4 45.h4 Kd5 46.Kf5 b5 47.g5 Kc5?? (47...Kd6 48.h5 Ke7 49.g6 hg6 50.Kg6=) 48.Kf6 (better 48.h5 Kc4+-) 48...Kd5?? (better 48...a5=) 49.Kg7+- Ke6 (49...Kc4 50.Kh7 Kb3 51.g6+-) 50.Kh7 a5 (50...Kd5 51.g6 Kc4 52.g7+-) 51.g6 b4 52.ab4 ab4 53.g7 b3 1-0. WarlpiriMan - Meul62 (1610), ChessWorld.net, 2009.

4.e4= d6 5.h3 Be6 6.d4 d5 7.de5 d4? (better is 7...Ne4!? 8.Ne4 de4 9.Qd8 Kd8=) 8.Nce2 (8.ef6 dc3 9.Qd8 Kd8+–) 8...Ne4+/– 9.Qd4 (9.Nd4?! c5 10.Ne6 Qd1 11.Kd1 fe6+=) 9...Bd5?? (better is 9...Qd4 10.Nd4 a5 11.Ne6 fe6+/–) 10.c4+– c5 (10...Be7 11.cd5 Qd5 12.Qd5 cd5 13.Nf4+–) 11.Qd5 Ng5 (11...Qd5 12.cd5 cb4+–) 12.Qd8 Kd8 13.Bg5 Be7 14.Be7 Ke7 15.b5 Nd7 16.f4 Rhe8 17.0-0-0 Kf8 18.Rd7 b6 19.Nf3 h6 20.g4 Kg8 21.Bg2 a6 22.Nh4 Rad8 23.Rd8 Rd8 24.Rd1 Re8 25.ba6 Re7 26.Be4 g5 27.Rd8 Kg7 28.Nf5 Kg6 29.Ne7 Kg7 30.Rg8# 1–0. Duncanguy – blanco2003, ChessWorld.net, 2013.

4.Rb1 d5 5.b5 Na5 6.e3-/+.

4.Rb1 e4 5.e3 a5 (5...d5!?-/+) 6.b5= Ne5 7.d4 Neg4 (7...Ng6 8.h4=) 8.Qe2 (8.f3 ef3 9.gf3+=) 8...d6 (8...d5 9.h3 Nh6=) 9.h3+– Nh6 10.Qc4 (10.g4 g5 11.f3+–) 10...Be6?? (better 10...d5 11.Qb3 Be6=+) 11.d5+– Bd5?? (better 11...Bc8+–) 12.Nd5+– Nd5 13.Qd5 f5 (13...Be7 14.Qb7 0-0 15.Bc4+–) 14.Qb7 f4 (14...Rb8 15.Qd5 Be7 16.Ne2+–) 15.Qe4 (better 15.b6 Be7 16.bc7 Qc8+–) 15...Be7 16.ef4 (16.Bc4 fe3 17.Be3 Nf7 18.Qc6 Kf8+–) 16...0-0 (16...d5 17.Qd3 Bc5 18.Be2+–) 17.Bc4 Nf7 (17...Kh8 18.Nf3+–) 18.Bd3 (better 18.Ne2 Re8+–) 18...Re8 (18...g6 19.Qd5 Bf6 20.Ne2+–) 19.Qh7 Kf8 20.Bb2 (better 20.Ne2 Bf6+–) 20...Bf6 21.Kd1 (21.Ne2 Bb2 22.Rb2 Qf6+–) 21...d5 (21...Bb2 22.Rb2 Qf6 23.Rb1 Qf4 24.Nf3+–) 22.Bg6 (22.Nf3 Bb2 23.Rb2 Qf6+–) 22...d4 (22...Bb2 23.Bf7 Kf7 24.Rb2+–) 23.Bf7 (better 23.Nf3!? Qd5 24.Qh5 Qh5 25.Bh5 Red8+–) 23...Kf7 24.Nf3 d3 (24...Qd5 25.Qd3 Re4+–) 25.cd3 Rh8 (25...Kf8+–) 26.Ne5 (26.Ng5 Bg5 27.Qg7 Ke8 28.Qg6 Kd7 29.Qf5 Ke8 30.fg5 Qd7 31.Qe4 Kf8 32.Qa8 Kf7 33.Qf3 Kg8 34.g6 c6 35.bc6 Rh6 36.cd7 Rg6 37.d8Q Kh7 38.Qh8) 26...Be5 27.Qf5 Bf6 28.Bf6 gf6 (28...Qf6 29.Qd5 Qe6 30.Qe6 Ke6 31.Re1 Kd7 32.Rc1+–) 29.g4 (29.Rc1 Rb8+–) 29...Qe7 (29...Qd6 30.Rc1 Rad8 31.Kd2+–) 30.g5 Rad8 (30...Rae8+–) 31.g6 (better 31.Re1 Qd6 32.Rb3+–) 31...Kg7 32.Rb2?? (32.Kd2 Rd4 33.Rb3 Qd6+–) 32...Rh6?? (better 32...Qa3!? 33.Rc2 Qd3 34.Qd3 Rd3 35.Ke2 Rb3+–) 33.Rg1 (better 33.Rc2 Rg6 34.h4+–) 33...Rg8?? (better 33...Qa3 34.Kc2 Qd6+–) 34.Re2 c5 35.Re7 Kf8 (35...Kh8 36.Qf6 Rg7 37.Qg7) 36.Qf6 1–0. garabrut – natanya, gameknot.com, 2018.

4.b5 Na5=+.

4.e4 d5 5.ed5 Nd5 6.Nf3=+.

4.e4 Bd6 5.Nf3= 0-0 6.Bc4 a6 7.0-0 b5 8.Bb3 Bb7 9.d4 (9.Re1 Re8=) 9...ed4=+ 10.Nd4 Nd4 11.Qd4 Nh5?? (better 11...Qe7!? 12.Bb2 A) 12...Be4? 13.Rfe1 c5 14.bc5 Bc5 15.Re4 Ne4 16.Nd5+- (16.Qe4?! Qf6 17.Qf3 Bd4+/-); B) 12...c5 13.bc5 Bc5=+) 12.g3?? (better 12.e5 Be7 13.g4+-) 12...Qe7 13.Bb2 Be5 (13...Rfe8=) 14.Qc5 (14.Nd5 Bd5 15.Qe5 Qe5 16.Be5 Bb3 17.cb3 Rfe8 18.Bc7 Re4+=) 14...Qg5 (better 14...Qc5 15.bc5 Nf6=+) 15.h4 Qg4?? (better 15...Qf6 16.Rfd1 Rad8+=) 16.Qe3 (better 16.Qe5 d6 17.Qg5+-) 16...Nf4-/+ 17.Rae1 Nh3 (17...Rae8!?-/+) 18.Kh2=+ Rae8 19.Bd5? (19.f4 Bc3 20.Qc3 Re4 21.Re4 Be4=) 19...Qh4?? (better 19...Nf4 20.Kg1 c6-+) 20.Kg2 Qg4 21.Kh1?? (better 21.Bb7 Nf4 22.Kg1 Nh3 23.Kh2=) 21...Qh5 (better 21...Bd5 22.ed5 Ng5-+) 22.Kg2 Bc8?? (better 22...Bd5 23.Nd5 Bb2-+) 23.f4= Bf6 24.e5 (24.Qe2 Qe2 25.Re2 c6=) 24...d6 25.Ne4 de5 26.fe5?? (better 26.Nf6 gf6 27.fe5=) 26...Be5-+ 27.Bc1 (27.Bd4 Rd8 28.Be5 Rd5-+) 27...Qg4 (27...h6!? 28.c4 bc4 29.Qe2-+) 28.Qf3 (better 28.Qb3 Qg6 29.Nc5-/+) 28...Nf4?? (better 28...Qg6 29.Nc5 Qc2 30.Re2 Qg6-+) 29.Kf2?? (better 29.Bf4 Bf4 30.Qf4 Qf4 31.Rf4+-) 29...Bd4 (29...Nd5 30.Qg4 Bg4 31.Kg2-+) 30.Be3 Be3 31.Re3 Nh3 (better 31...Nd5 32.Qg4 Bg4-+) 32.Ke1 (32.Kg2 Qg6 33.Rc3 Be6 34.Be6 fe6-+ (worse 34...Re6 35.Kh3 Re4 36.Rc7-+; 34...Qe6?! 35.Rc7 Qe4 36.Qe4 Re4 37.Kh3=+)) 32...Qd7 (better 32...Qg6 33.Qe2 Bd7-+) 33.Rd3?? (33.Qh5 Re7 34.g4 c6 (34...Qg4?! 35.Nf6 gf6 36.Qg4 Bg4 37.Re7=) 35.Qh3 cd5-/+) 33...Qe7 (better 33...Ng5 34.Qe3 Ne4 35.Be4 Re4 36.Qe4-+) 34.g4?? (34.Kd2 Be6 35.Bc6 Rd8-+) 34...Qh4 (better 34...Ng5 35.Qf4 Ne4-+) 35.Kd2 Bg4 36.Qe3 (better 36.Qf7 Rf7 37.Bf7 Kf8 38.Bd5 Nf2 39.Rf2 Qf2 40.Nf2 Re2 41.Kc3 Rf2 42.Bb7-+) 36...Ng5?? (better 36...Be6 37.Bc6 Rd8-+) 37.Ng5?? (better 37.Qg5 Qg5 38.Ng5+/-) 37...Re3-+ 38.Re3 Qg5 39.Rfe1 Qd5 40.Kc1 h6 (better 40...Qa2 41.Re8-+) 41.Rd3 Qg5 (better 41...Qa2 42.a4-+) 42.Kb2 Qf6 43.c3 Qf2 44.Kb3 (44.Kb1 Qe1 45.Kc2 Qe2 46.Kc1 Qd3 47.a4 Qc3 48.Kb1 Bf5 49.Ka2 Rd8 50.ab5 Rd2) 44...Qe1 45.c4 (45.Kc2 Qe2 46.Kb1 Qd3 47.Kb2 Qd2 48.Ka1 Re8 49.Kb1 Re1) 45...Bd1 (45...Qb1 46.Kc3 Qc1 47.Kb3 bc4 48.Ka4 cd3 49.b5 Qc4 50.Ka5 Qb5) 46.Rd1 (46.Kb2 Qe2 47.Rd2 Qd2 48.Ka1 Bb3 49.Kb1 Re8 50.cb5 Re1) 46...Qd1 47.Ka2 (47.Kb2 Rd8 48.cb5 Rd2 49.Kc3 Qc2) 47...Re8 48.Kb2 Re2 (48...Qd2 49.Kb3 Re3) 49.Kc3 Qd2 50.Kb3 Qb2 (50...Qd3) 0-1. Paul593 - NAF869 (1610), ChessWorld.net, 2019.

4.Nc3 Bb7=+.

4.d3 Bb7 5.e4 (5.Nf3 Bd6-/+) 5...g6 (5...a5 6.b5=+) 6.g4 (6.Nf3 Nc6=+) 6...d6 (6...Nc6 7.g5 Nh5 8.Nf3=+) 7.g5=+ Nfd7 8.h4 Bg7 9.Bh3 (9.h5 a5 10.b5 Nc5=) 9...0-0 (9...a5 10.b5 f5 11.gf6 Nf6 12.Nf3=+) 10.h5 c5 (better 10...a5 11.b5 Nc5=) 11.b5+/- f6? (better 11...a6!? 12.Nc3 ab5+/-) 12.h6 (12.hg6 hg6 13.Be6 Rf7+-) 12...Bh8 13.Be6 Rf7 14.Nh3 Qe7 15.Bf7 Qf7 16.0-0 Qe6 17.gf6?? (better 17.Qf3+-) 17...Qh3-+ 18.Bg5 (18.f7 Kf7 19.Nc3-+) 18...Nf6 19.Ra2 Nh5 20.f3 (20.Nd2 Nd7 (20...Qd3?! 21.Qg4 Nf4 22.Bf4 ef4 23.Nf3 Qe4 24.Re1-+) 21.Qf3 Qe6-+) 20...Nf4 (20...Ng3 21.Rg2 Qh1 22.Kf2 Nf1 23.Qf1 Qf1 24.Kf1-+) 21.Bf4 (21.Qe1 Qh5 22.Be7 Qh6-+) 21...ef4 22.Rh2 Bd4 23.Kh1 Qe6 24.Qe2 (24.Qe1 Nd7-+) 24...Nd7 25.Rh4 (25.Nd2 a6 26.Nb3 Bf6-+) 25...g5 26.Rh5 (26.Rh2 Qg6-+) 26...Bf6 (better 26...Qg6!? 27.Rh2-+) 27.Qg2 (27.Qc2 Ne5-+) 27...Kh8 28.Nd2 (28.Qc2 Rg8 29.Nc3 g4-+) 28...Rg8 29.a4 (29.Rh2 Ne5-+) 29...Ne5 30.Qe2 Be7 31.Rg1 (31.Rf2 Qf7 32.Rhh2 g4 33.fg4 Ng4-+) 31...Rg6 32.Nb3 (32.Rf1 Rh6 33.Rh6 Qh6 34.Qh2 Qe6-+) 32...Rh6 33.Qh2 Rh5 34.Qh5 Qg6 (34...h6 35.a5-+) 35.Qh3 (35.Qg6 hg6 36.a5 Kg7-+) 35...Nd3 36.Kh2 (36.Rf1 Ne5 37.Nd2 g4 38.fg4 Nc4 39.Rf4 Nd2 40.Qc3 Kg8 41.Qd2 Bg5 42.Qa2 Kg7 43.Qb2 Bf6-+) 36...Ne5 37.Nd2 Qg8 (37...Kg7 38.Qg2-+) 38.Qh5 (38.Kh1-+) 38...Qg6 39.Qh3 Qe8 (39...Kg7!? 40.Qg2-+) 40.Qh6 Nf7 (40...Qd8 41.Kg2-+) 41.Qh3 (41.Qh5 Qg8-+) 41...Bc8 42.Qf1 (42.Qh5 Qg8-+) 42...Ne5 43.Kg2 (43.Rh1 g4 44.fg4 Qg6 45.Qf4 Ng4 46.Kg2 Ne3 47.Kf2 Qg2 48.Ke3 Bg5 49.Qg5 Qg5 50.Kd3 d5-+) 43...Qg6 44.Kf2 (44.Qf2 Be6-+) 44...g4 45.Ke1 (45.Qg2 Bh4 46.Kf1 Bg3-+) 45...Bh4 Black plans g3 46.Kd1 g3 47.Rg2 (47.Kc2 Be6 48.Kd1 h5-+) 47...Bh3 48.Qh1 (48.Kc2 Qe6 49.Kb3 Bf6-+) 48...Bg2 49.Qh4 (49.Qg2 Qg8 50.Qh1 g2-+) 49...Qf7 (better 49...Bf3 50.Nf3 Nf3 51.Qf4-+) 50.Ke1 (50.Qd8 Kg7 51.Qg5 Qg6 52.Qg6 hg6-+) 50...Qf8 51.Nb3 (51.Qh5-+) 51...Nf3 52.Ke2 (52.Kd1 Nh4 53.e5 Bf3 54.Kc2 g2 55.Nd2 Qf5 56.Kb3 Qd3 57.Kb2 Qd2 58.Ka3 g1Q 59.a5 Qg3 60.ed6 Bd1) 52...Nh4 53.Nd2 (53.Kd2 f3 54.Nc5 f2 55.Kd3 f1Q 56.Kd2 Q8f4 57.Kc3 Q4c1 58.Kb3 Qfc4) 53...f3 54.Kd3 Qf4 55.Kc2 (55.a5 f2 56.Kc2 Be4 57.Ne4 f1Q 58.Nc3 Q4c1 59.Kb3 Qd3 60.ab6 Qdc2) 55...f2 56.Kc3 (56.e5 Be4 57.Kc3 Qe3 58.Kb2 Qd2 59.Kb3 f1Q 60.a5 Qa5 61.ed6 Qb1) 56...Be4 57.Nf1 (57.Nb3 f1Q 58.a5 Qe3 59.Kb2 Qb1 60.Ka3 Qbb3) 57...g2 58.Nd2 (58.Nh2 g1Q 59.Nf1 Qf1 60.a5 Qe3 61.Kb2 Qb1) 58...g1Q 59.Nb3 (59.Nf1 Qf1 60.Kb3 Qa1 61.a5 Qe3) 59...f1Q (59...Qe3 60.Kb2 Qb1 61.Ka3 Qbb3) 60.Kb2 (60.a5 Qge3 61.Kb2 Qfg3 62.ab6 Qb3) 60...Qe2 61.Ka3 (61.Nd2 Qfe3 62.a5 Q2d2) 61...Bb1 (61...Qfe3 62.a5 Qa1) 62.Nc5 (62.Nd2 Qed2 63.Kb3 Qge3) 62...Qc5 63.Kb3 Qfe3 (63...Qfc4) 0-1. Paul593 - freethinker 67 (1780), ChessWorld.net, 2018.

4.e3 Bb7 5.d4 (5.Bb2 Bd6=+) 5...Bd6 (5...ed4 6.ed4 a5 7.ba5 Ra5 8.Nf3-/+) 6.de5 (6.c5!? bc5 7.bc5=) 6...Be5-/+ 7.Ra2 h6 (7...0-0 8.Nf3 Bd6 9.Nc3=+) 8.f4 (8.Nf3 Bd6=+) 8...Bd6-/+ 9.g3?? (9.Nf3 a5 10.c5 bc5 11.bc5 Bc5-/+) 9...Nc6 (better 9...Bh1 10.Nc3 Bb7-+) 10.Bd3?? (better 10.Nf3-/+) 10...Nb4-+ 11.Rd2 (11.ab4 Bh1 12.Nf3 Bb4 13.Kf2 Bf3 14.Qf3-+) 11...Nd3 12.Rd3 Bh1 13.Nc3 0-0 14.Qe2 (14.Nf3 Qe7 15.Kf2 Ng4 16.Kg1 Qe6-+) 14...Re8 15.Nf3 Bc5 16.Ne5 (16.Qf1 Bf3 17.Qf3 c6-+) 16...d6 17.g4 (17.Kf1 Bb7 18.Ng4 Ne4 19.Ne4 Re4-+) 17...Qc8 18.Nf7 (18.g5 Ne4 19.Ng4 hg5 20.fg5 Ng5-+) 18...Kf7 19.g5 Ne4 20.Qh5 Kg8 (better 20...g6 21.Qh4-+) 21.gh6 Nc3 22.Qg6 (22.Rc3 Qd7 23.Kf1 Be4-+) 22...Qd7 23.Rc3 Kf8 (better 23...Be4!? 24.Qg5-+) 24.f5 Be4 (better 24...Qe7 25.Kf1 Be4-+) 25.h7= Ke7 26.Qg7?? (better 26.Qg5 Kf7 27.Qg6 Ke7 28.Qg5 Kf7 29.Qg6 Ke7=) 26...Kd8-+ 27.h8Q Bf5 (better 27...Rh8 28.Qh8 Qe8 29.Qh4 Kd7-+) 28.Qh4 Kc8 29.Qg2 c6 30.Qhf2 (30.Qf6!?=+) 30...Kc7 31.a4 (31.Bb2!?-/+) 31…Qe7 (31...Qe7 32.Qf5 Bb4+-) 0-1. Paul593 – virchow, ChessWorld.net, 2009.

4.e3 Be7 5.Bb2 d6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 b6).

4.Bb2 Nc6=.

4.c5 Be7+= 5.Bb2 Nc6 (5...d6 6.cd6 Bd6 7.Nc3+=) 6.e3 (6.b5 Nd4=) 6...d6+= 7.cd6 Bd6 8.h3 Bf5 9.Nc3 Ne4 (9...0-0 10.Qf3 Bg6 11.d3+=) 10.d3 (10.Ne4 Be4 11.Qg4 Bg6=) 10...Nc3+= 11.Bc3 e4 (better is 11...a6!?+=) 12.Bg7 Rg8 13.Bb2 (13.Bc3 ed3 14.Qf3 Bg6+=) 13...Qe7 (13...ed3 14.Nf3 (worse is 14.Bd3 Bd3 15.Qd3 Bb4 16.Ke2 Qd3 17.Kd3 Rd8 18.Ke4 Rd2-/+) 14...Qd7 15.b5+=) 14.d4 (better is 14.g4 Bg6 15.d4+/–) 14...0-0-0?? (14...Nb4 15.g4 (worse is 15.ab4 Bb4 16.Ke2 Bd7-+) 15...Bd7 16.d5= (16.ab4 Bb4 17.Qd2 Bd2 18.Kd2 Qh4-+)) 15.Bb5?? (better is 15.Qa4!?+–) 15...Nb8 (15...Rg2 16.Bc6 bc6 17.h4-/+) 16.Bf1 (better is 16.g3+=) 16...Be5?? (better is 16...Nc6!?=) 17.g4 Bg3?? 18.fg3+– Be6 19.Rc1 f5 20.gf5 Bf5 21.Ne2 c6 22.Bg2 b5 23.g4 Be6 24.Nf4 Bd5 25.Qc2 Qh4 26.Ke2 Qg3 27.Rcg1 Bc4 28.Kd1 Rgf8 29.Qe4 Qf2 30.Bc1?? Rf4! 31.Qc2? Qc2 32.Kc2+– Rf2 33.Kc3 Re2? 34.Bf3 Kc7 35.Be2 Be2 36.Re1 Bc4 37.g5 Nd7 38.h4 Bd5 39.e4 Bf7 40.e5 Bd5 41.Rhf1 Bc4 42.Rf4 Nb6 43.Rf7 Rd7?? 44.Rf6 White prepares the advance e6 44...Nd5 45.Kb2 Nb6 46.e6 Nd5 47.Bf4 Nf4 48.Rf4 Re7 49.Rf7! Rf7 50.ef7 Bf7 51.Re7 Kd6 52.Rf7 Ke6 53.Rf1 Kd5 54.Kc3 Ke4 55.h5 Kd5 56.g6 hg6 57.hg6 Ke4 58.g7 Kd5 59.g8Q Ke4 60.Qe8 Kd5 61.Qe5# 1–0. pillsbury (2095) – mduerr (1700), net–chess.com, 2012.

4.c5 Be7 5.e3 e4 (5...0-0 6.Nc3=+) 6.Bb2 (better 6.Nc3=+) 6...Nd5?? (better 6...0-0-/+) 7.Bg7+/- Rg8 8.Bh6 (better 8.Nc3!? Ne3 9.fe3 Rg7 10.Ne4+/-) 8...Rg6 (8...Bf6 9.Ra2 d6 10.Qc2=+) 9.Bf4 (better 9.Qb3 c6 10.Bf4 Nf4 11.ef4=+) 9...Nc6?? (9...Bf6 10.Ra2 Nf4 11.ef4-/+) 10.Qh5?? (better 10.Ne2 Bg5 11.Bg3+/-) 10...Nf4-/+ 11.Qh7?? (better 11.ef4 Nd4 12.Ra2=+) 11...Ne6 (11...Bf6 12.Nc3 Bc3 13.dc3-+) 12.Qh8 (12.Nc3 Bf6 13.Nge2 d5 14.cd6 cd6-+) 12...Nf8 (better 12...Bf8-+) 13.Be2 (13.Nc3 Bf6 14.Qh5-+) 13...Rg2 (13...Bf6 14.Qh5 Ba1 15.g3-+) 14.Bh5 (14.Nc3 d5 15.cd6 Bd6 16.Qh5-+) 14...Bf6 15.Qh6 Bh4 (better 15...Ba1 16.Qf4 Qe7 17.Bf7 Kd8 18.Bd5-+) 16.Qf4 (16.Nc3 Rf2 17.0-0-0-+) 16...Bf2 (better 16...Qe7 17.Bf7 Kd8-+) 17.Kd1? (17.Kf1 Rg7 18.Qf2 d5 19.cd6 Qd6-+) 17...Qe7 (17...Rg1? 18.Rg1 Qe7 19.Rg7+-) 18.Ne2? (18.Nh3 Be3! 19.Bf7 Qf7 20.Qe4 Ne7 21.Qg2 Bd4-+) 18...Ng6 (better 18...Ne6!? 19.Qe4 Rg5 20.Ng3-+) 19.Bg6 Ne5?? (better 19...fg6 20.Nbc3 Qe5 21.Qe4 Qe4 22.Ne4 g5-+) 20.Be4+/- Nc4?? (better 20...Rg4 21.Qf2 Re4+-) 21.Bg2+- Nb2 (21...Qh4+-) 22.Kc2 Na4 23.Qf2 c6 24.Kb3 (24.Nbc3 Nc3 25.Nc3 d5+-) 24...b5?? (24...Qe6 25.Bd5 Qd5 26.Kc2 Qh1+-) 25.Nd4 d5 26.Nc6 (26.cd6 Be6 27.Kc2 Qd6 28.Bc6 Qc6 29.Nc6 Rc8+-) 26...Qe6 27.Nd4 Qg6 28.Bd5 Qd3 29.Nc3 Be6 30.Qg2 (30.Ne6 fe6 31.Rhg1 Nc5 32.bc5 0-0-0 33.Be6 Qd7 34.Bd7 Kb7 35.Rg7 a6 36.Bb5 Kb8 37.Qf3 Rd7 38.Rd7 ab5 39.Qb7) 30...Rd8 31.Be6 fe6 32.Qc6 Rd7 33.Qe6 (33.Ne6?! Qc4 34.Kc2 Qd3 35.Kb3 Qc4 36.Kc2 Qd3 37.Kb3=) 33...Kd8 34.Rhg1 Kc8 35.Rg8 Kc7 (35...Kb7 36.Qc6) 36.Qc6 1-0. Paul593 - VINIJR017, ChessWorld.net, 2009.

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.a3 g6).

4.Bb2 Bg7 5.Nc3 d6 6.d3 0-0 7.g3 Nc6 8.Bg2 Rb8 (8...e4 9.Ne4 Ne4 10.Bg7 Nf2 11.Kf2 Kg7 12.Bc6 bc6 13.Qd2=) 9.Nf3= a6 10.0-0 Na7 (10...Bg4 11.Qd2=) 11.b5+= ab5 12.cb5 c6 13.a4 cb5 (13...b6!?+=) 14.ab5+/– Qb6? (better is 14...Ra8!?+/–) 15.Qa4+– Bd7? (15...Ra8 16.Qa5 Qa5 17.Ra5 e4+–) 16.Qa7 Qa7 17.Ra7 Be6 (17...Rfc8 18.Rfa1+–) 18.Ng5 Nd7 (18...d5 19.Nd1 d4 20.f4 ef4 21.Bd4+–) 19.Bb7 Nc5 20.Bc6 Nb3 (20...e4 21.de4 Rfc8 22.Ba1 Bc3 23.Bc3+–) 21.Ba3 Rfd8 (21...Nc5 22.Nce4+–) 22.Ne6 fe6 23.Bd7 e4 (23...Nc5 24.Bc5 dc5 25.Rb1+–) 24.Be6 Kf8 (24...Kh8 25.Rg7 Kg7 26.Bb3 ed3 27.ed3 Rd7+–) 25.Ne4 1–0. pierre – anony, internet, 2015.

4.Qc2 Bg7 5.Bb2 d6 6.Nc3 0-0 7.Na4 Bf5 8.d3 Nbd7 (8...e4 9.e3=+) 9.e4= Be6 10.c5 (10.Nf3 Nh5=) 10...Re8 (10...b5 11.Nc3=+) 11.cd6 (11.Nf3 a5=+) 11...cd6-/+ 12.Be2 Rc8 13.Bc3? (better is 13.Qb1-/+) 13...b5-+ 14.Nb2 d5 15.ed5 Bd5 16.f3 Bb7 17.0-0-0?? Nd5 18.Nh3 Rc3 0–1. formrtexn – ozone, net–chess.com, 2003.

4.c3 Nc6 5.Nf3 Qc7 6.e4 cb4 7.cb4 Nb4 8.ab4 Qc3 9.Nc3 Bb4 10.Bd2 Bc5 11.Ne5 Ng4 12.Ng4 1-0. sagenwald – benjapercu, Rated Blitz game, lichess.org.

4.bc5 Bc5 5.Bb2 0-0 6.e4 d5 7.ed5 Re8 8.Be2 e4 9.d4 Bb6 10.c3 Qd5 11.Nd2 Qg5 12.g3 Ng4 13.f4 ef3 14.Ndf3 Qe3 15.h3 Qf2 16.Kd2 Ne3 17.Qe1 Nc4 18.Kc2 Bf5 19.Kb3 Qe1 20.Ne1 Ne3 21.Nc2 Bc2 22.Ka2 Nc6 23.Bf3 a5 24.Bc6 bc6 25.Nf3 a4 26.Ne5 Bb3 27.Kb1 Nc2 28.Nc6 Re6 29.Nb4 Na1 30.Ka1 Rae8 31.Kb1 Re1 32.Re1 Re1 33.Bc1 Re2 34.Nd5 Bd5 Normal 0-1. Oper26 – Maraschino, Rated Blitz game, lichess.org, 2016.

4.c3 Be7 (4...d5 5.Nf3=+) 5.Be3 (5.b5 Nb8=+) 5...d5 6.d4 e4 7.h3 0-0 8.g4 (8.Bg5 a5 9.b5 Na7=+) 8...Bd6 9.Kd2 (9.Bg2 a5 10.Nd2 ab4 11.ab4 Ra1 12.Qa1 Ne7-/+) 9...Ne7 10.f3 b6 (10...a5 11.b5-+) 11.f4 (11.Bg5 Ng6-/+) 11...Ng6 (better 11...a5 12.Qb3 b5-+) 12.g5? (better 12.f5 Ne7 13.Qb3-/+) 12...Nh5-+ 13.Kc1 (13.Bf2 Bf4 (13...Ngf4?! 14.e3-/+) 14.e3 Ng3 15.Bg3 Bg3-+) 13...Nhf4 (13...Ng3!? 14.Rh2 Nf5 15.Bd2 Nf4 16.Kb2-+) 14.h4 Nh5 15.Bh3 Nh4?? (better 15...Bh3 16.Rh3 b5-+) 16.Bc8-/+ Rc8 (better 16...Ng2!? 17.Bd2 Ng3-/+) 17.Rh4= Nf4?? (better 17...Ng3 18.Rh3 a5=) 18.Bf4+- (18.Rf4?! Bf4 19.Bf4 c5+-) 18...Bf4 19.Rf4 Qg5 20.e3 h5 (20...c5 21.dc5 bc5 22.Ne2+-) 21.Qf1 f6 (21...c5 22.dc5 bc5 23.Ne2+-) 22.Qf2 Kf7 23.Nh3 Qg6 24.Nd2 Rh8 25.Kc2 f5 (25...Ke8+-) 26.Rg1 Qc6 27.Rf5 Ke7 (27...Kg8 28.Nf4 Rh6+-) 28.Rg7 Kd8 29.Rf8 (29.Qh4 Qf6 30.Qf6 Ke8 31.Qe7) 29...Rf8 30.Qf8 Qe8 31.Qf6 (31.Qf6 Qe7 32.Qe7) 1-0. ro74cky - Stupid8, Rated Classical game, lichess.org, 2014.

4.c4 Nd4 5.c5 c6 (5...d6 6.e3 Ne6 7.Nf3=+) 6.e3=+ Ne6 7.d4? (7.Nf3 a5 8.Bb2 ab4 9.ab4 Ra1 10.Ba1 d6=+) 7...e4 (7...ed4 8.ed4 a5 9.Bb2-/+) 8.Bc4 (8.Nc3 a5 9.Bd2 d5=) 8...Ng5 (better 8...d5!? 9.Ba2 Qc7-/+) 9.f4 Ne6 10.g4? (10.Nc3 d5 11.cd6 Bd6= (worse 11...Qd6 12.Nge2+/-)) 10...g6 (10...b5 11.Bb3 a5=+) 11.Nh3 (11.Nc3!? h6 12.Nh3=) 11...d5 12.Be2 a5 13.Qa4 b5 14.Qc2 (better 14.cb6!? Qb6 15.Bd2=+) 14...ab4-+ 15.a4 (15.Qb2 Qa5 16.Bd2 h5-/+) 15...h5 16.Ng5? (16.g5 Ng4 17.Qb2 Qa5-+) 16...Ng5 (better 16...hg4 17.Qb2 g3-+) 17.fg5 Ng4 (17...Nd7!? 18.Qb2 ba4 19.gh5 Qg5 20.Qb4-+) 18.h3-/+ Ne3 19.Be3 Bf5 (19...Be7 20.h4 Qa5 21.Bd2 ba4 22.Qb2-/+) 20.Bf4 (20.Qb2 Qa5 21.Bd2 ba4 22.Qb4 Qb4 23.Bb4 e3=+) 20...e3 (20...Be7 21.h4 0-0 22.Qb2-/+) 21.Qd1 (21.Qb3 Bg7 22.Qe3 Kd7=+) 21...Be4 (better 21...Bg7 22.Be3 0-0-+) 22.Bd3?? (22.0-0 Be7 23.h4 Qd7=) 22...f5 (22...Bh1 23.Ke2 Be4 24.Be4 de4 25.Be3-+) 23.a5?? (23.0-0=+) 23...Bd3 (better 23...Bh1 24.Ke2 Be4 25.Ke3 Bg7-+) 24.Qd3= Qe7 (24...Bg7!?=) 25.0-0 (25.Qe3!? Bg7 26.Kf2+/-) 25...Qe4+= 26.Qe3 Qe3 (26...Bg7!? 27.Nd2 Bd4 28.Ne4 Be3 29.Be3 de4+/- (29...fe4? 30.Rf6+-)) 27.Be3+/- Bg7 (27...0-0-0+/-) 28.a6 (better 28.Nd2!?+-) 28...Kf7 29.a7 (better 29.Kf2+=) 29...Bf8?? (29...Rhe8 30.Bf2 Re7+=) 30.Ra6 Be7? (30...Bg7 31.Nd2 Rhe8+-) 31.Nd2 Bd8 (31...Rhe8 32.Bf4 Bf8 33.Nf3+-) 32.Rfa1 h4 (32...Re8 33.Bf4 Re7 34.Kf2+-) 33.Rc6 Re8 34.Rf6 (better 34.Bf4 Re7 35.Rca6+-) 34...Bf6-+ 35.c6 (35.Bf2 Bg5 36.Nf3-+) 35...Re3 36.c7 (36.gf6 Rh3 37.Ra6 Ra3-+) 36...Rd3 (better 36...Bd4 37.c8Q Rc8-+) 37.gf6 Rd2 38.Ra6 (38.Rc1 Ra2 39.c8Q Rc8 40.Rc8 Ra7 41.Rc1-+) 38...f4 (38...b3 39.Ra1 b2 40.Re1 Rc2 41.c8Q Rcc8 42.Re7 Kf6 43.Re2 b1Q 44.Kf2 Rc2 45.Rc2 Qc2 46.Kf3 Ra7 47.Ke3 g5 48.Kf3 Ra3) 39.c8B (39.Rc6 Rc8 40.Ra6 Rc7 41.Ra1-+) 39...Rc8 40.Rc6 (40.Ra1 b3 41.a8B Ra8 42.Rc1 b2 43.Rb1 Ra1 44.Rf1 Rf1 45.Kf1 b1Q) 40...Rc6 41.Kf1 (41.a8Q Rc1) 41…Rc1 0-1. Paul593 - Nathan_Wales, ChessWorld.net, 2008.

4.e4 d5 5.Nd2 de4 6.de4 Bd6 7.Bb5 0-0 8.f3 Nd4 9.Bd3 a6 10.c3 Nc6 11.Nc4 Be6 12.Na5 Na5 13.ba5 Bc5 14.Qe2 Qd7 15.Be3 Be3 16.Qe3 Rad8 17.Rd1 Qa4 18.Ra1 Qa5 19.Ne2 c5 20.0-0 Rd7 21.h3 Rfd8 22.Rfd1 Bb3 23.Rd2 c4 24.Bc2 Rd2 25.Bb3 cb3 26.Qg5 Re2 27.Kh2 Rdd2 28.Rb1 Qc3 29.Qe5 Qe5 30.f4 Qf4 Normal 0-1. pistadruzganic - shahpatus (1665), Rated Classical game, lichess.org, 2015.

4.e4 d5 5.ed5 Nd5 6.Nf3 Be6 7.b5 Bd6 8.bc6 bc6 9.c4 Nf4 10.Nc3 0-0 11.Be2 c5 12.0-0 Qf6 13.Ne4 Qg6 14.Nh4 Ng2 15.Ng6 fg6 16.Kg2 Be7 17.Bg4 1-0. sagenwald – sebastianmartin, Rated Blitz game, lichess.org.

4.Bb2 0-0 5.Be5= Nc6 6.Bb2 Re8 7.e4 d5 8.ed5?? (8.Nd2 Bd6 9.f3 Be6=) 8...Nd5 (8...Bb4#) 9.Be2+= Bf6 10.Bf6 (10.Qc1!?+=) 10...Qf6-/+ (worse is 10...gf6 11.Qd2+=; 10...Nf6?! 11.Nf3=) 11.Nd2? (11.Ra2 a5 12.b5 Nd4-+) 11...Bf5 (better is 11...Nd4 12.Qc1 Nc2 13.Qc2 Qa1 14.Nb1 Nf4-+) 12.Ngf3?? (better is 12.Nb3 Nf4 13.Kd2-+) 12...Re6 (better is 12...Nc3 13.Rb1-+) 13.0-0 (13.Ne4 Be4 14.0-0 Rd8-+) 13...Nc3 14.Qe1 Ne2 15.Kh1 Ng3! 16.fg3 Re1 17.Rae1 g6 18.Nh4 Nd4 19.Ne4 Qc6 20.Nf5 Nc2 21.Ne7+– Kg7 22.Nc6 Ne1 23.Re1 bc6 24.Nc5 Rd8 25.Re7 Rd5 26.Rc7 a5 27.Rc6 ab4 28.ab4 f5 29.b5 Kf8 30.b6 Ke8 31.b7 Rd8 32.Rc8 black timed out. (32.Rc8 Kf8 33.Rd8 Kg7 34.Rd7 Kh6 35.b8Q Kh5 36.Rh7 Kg5 37.Qd8 Kg4 38.Qh4#) 1–0. pillsbury (2095) – jscheff (1745), net–chess.com, 2012.

4.Bb2 d6!?+=.

4.c4 0-0 5.c5 (5.Nf3!?=+) 5...Nc6 (5...a5 6.Bb2-+) 6.e3 d6 (better 6...b5-+) 7.d4? (7.b5 Nb8-/+) 7...e4?? (better 7...ed4 8.b5 de3 9.Be3 Ne5-+) 8.f3 (8.Nc3 dc5 9.bc5 b6-/+) 8...dc5 9.bc5 Bf5 (9...Re8 10.Nc3 Nd5 11.Ne4-/+) 10.g4 (10.Nc3 h5-+) 10...Bd7 (10...Bg6 11.Bg2 Nd5 12.fe4 Bh4 13.Kf1-+) 11.Bg2 (11.g5 Ne8 12.h4=+) 11...ef3-+ 12.Nf3 Bg4 13.h3 (13.Nc3 b6 14.Qa4 Bd7-+) 13...Bh5 (13...Bf5 14.0-0-+) 14.0-0 (14.Nc3 Nd5 15.Nd5 Qd5-+) 14...Ne4 15.Bb2 (15.Nbd2 f5-+) 15...Ng3 (15...Re8 16.Qe1-+) 16.Rf2 (16.Re1 Nf5 17.Nbd2 Bh4-+) 16...Bh4 (16...Bg5 17.Bc1-+) 17.Rd2? (better 17.Qe1!? Re8 18.d5 Bf3 19.Rf3-+) 17...Ne4 (better 17...Re8 18.Rd3 Bg5-+) 18.Rd3 (18.Qf1-+) 18...Nf2 19.Qd2 (19.Qe2 Bf3 20.Bf3 Qg5 21.Bg2 Rae8-+) 19...Nd3 (19...Bf3 20.Bf3 Qf6 21.Qf2 Bf2 22.Kf2-+) 20.Qd3 Bg3 (better 20...Bf3 21.Bf3 Re8-+) 21.Nbd2 Bg6 (21...Re8 22.d5-+) 22.e4 (better 22.Qb3 Na5 23.Qc3-+) 22...Bf4 (22...Qe7 23.Qc3 f6 24.d5-+) 23.Qc4 (23.d5 f6-+) 23...Na5 24.Qb5 (24.Qe2 b6-+) 24...c6 25.Qb4 Be3 (25...Re8 26.Bc3 b6 27.Rb1-+) 26.Kh1 b6 (26...Re8 27.Bc3 b6 28.Rb1-+) 27.Nf1 (27.Bc3 Re8-+) 27...bc5 28.Qc5 Nb3 (better 28...Rb8 29.Qc2 Bf4-+) 29.Qe5?? (better 29.Qc3 Na1 30.Qe3-+) 29...Na1 (better 29...Re8 30.Qg3 Na1 31.Ne3-+) 30.d5 (30.Ne3 Re8 31.Qc5 Be4 32.Qc3-+) 30...Bh6 31.Ba1 cd5 (better 31...Re8 32.Qg3 Be4-+) 32.Ne3 (32.ed5 Re8 33.Qd4-+) 32...de4 (better 32...Re8 33.Qg3 Be3 34.Nd4 Bd4 35.Bd4 de4 36.Be3-+) 33.Ng4 ef3 (better 33...f6 34.Nh6 Kh8-+) 34.Bf1 (34.Nh6 gh6 35.Qg7) 34...Rc8 (better 34...Qg5 35.Bd4 Rad8-+) 35.Nh6 Kh8 (35...gh6 36.Qg7) 36.Qg7 1-0. Paul593 – RDTC, ChessWorld.net, 2009.

4.Bb2 Nc6 5.b5= Nd4 6.a4 (6.e3 Nb5 7.d4 c6 8.de5 Ne4=) 6...Bc5 (6...Qe7 7.e3 Nf5 8.Be2=) 7.c3 (7.e3 Nf5+=) 7...Nf5 8.e3 (better 8.e4 Nh4 9.d4 ed4 10.cd4 Bb4 11.Bc3=) 8...d6?? (better 8...d5=+) 9.d4+- ed4 10.ed4 (10.cd4?! Bb4 11.Bc3 Nd5 12.Bb4 Nb4=) 10...Bb6 11.a5 Ba5 12.Ra5 b6 (12...c6 13.Ra3+-) 13.Ra4 a5 (13...0-0 14.Be2+-) 14.ba6 Bd7 (14...0-0 15.Bd3+-) 15.Ra1 0-0 16.g3 (16.Bd3 Ra7+-) 16...Ne7 (16...Re8 17.Be2+-) 17.c4 c5? (17...Re8+-) 18.Bg2 Ra7 19.h3 (19.dc5!? dc5 20.Bf6 gf6+-) 19…Nf5 (19...Nf5 20.Ne2 Bc8+-; 19...Nc6 20.dc5 dc5 21.Ne2+-). Delboy Smith (1780) - jester7 (1765), ChessWorld.net, 2014.

4.Bb2 d6 5.Nf3=.

4.e4 b6 5.Bb2 d6 6.h3 Bb7 7.Nf3 Nbd7 8.Nc3 c5 9.Be2 d5 10.ed5 Nd5 11.b5 Bd6 12.0-0 0-0 13.a4 Qf6 14.Nd5 Bd5 15.c4 Bb7 16.Re1 Qg6 17.Bf1 Rae8 18.a5 Re6 19.ab6 ab6 20.Ra7 Bc8 21.Nh4 Qh7 22.Qf3 Be7 23.Nf5 Bf6 24.Qe4 g6 25.Ne3 Rfe8 26.Nd5 Bg5? (better is 26...Bd8+/–) 27.Nc7+– R8e7?? (27...Bd2 28.Ne6 Be1+–) 28.Ne6 Nf6 29.Qa8 Re8 30.Ng5 hg5 31.Re5 Be6 32.Qc6 g4 33.hg4 Rf8 34.f3 Qh6 35.g5 (35.g5 Rc8 36.gh6 Rc6 37.bc6 Bc4 38.dc4 b5 39.c7 b4 40.c8Q Kh7 41.Rf7 Kh6 42.Qf8) 1–0. pillsbury (2130) – brobitelle (2145), net–chess.com, 2011.

4.g3 d5 5.Bg2 Bf5 6.Nc3 c6 7.h3 h6 8.f3 ef3 9.Nf3 Ne4 10.g4 Nc3 11.Qd2 Ne4 12.Qf4 Be6 13.0-0 Bd6 14.Qe3 0-0 15.Ne5 Qh4 16.Rf4 Nd7 17.Nd7 Bd7 18.Bb2 Bf4 19.Qf4 Rae8 20.Rf1 Ng3 21.Qc7 Be6 22.Bc3 Ne2 23.Kh1 Nc3 24.Qb7 Bg4 25.Rf4 Re1 26.Kh2 Re2 27.Rg4 Qf6 28.Qa7 Qd6 29.Rg3 Ne4 0-1. souleater99 - vahid1355 (1610), Rated Classical game, lichess.org, 2014.

4.Bg5 Be7 5.Bc1 (5.c4 a5 6.b5 d6=) 5...d5-/+ 6.Qd2 (6.Bf4 Nh5 7.Bd2 0-0=+) 6...0-0 7.f3 (7.Qc3 a5! 8.b5 c5-/+) 7...Bf5 8.g4 Bg6 9.h4 ef3 10.ef3 Bd6?? (better 10...Re8 11.Kd1 h5-/+) 11.h5+/- Re8 12.Ne2 (12.Kd1 Be4 13.g5 Nbd7+/-) 12...Be4 13.fe4?? (better 13.Bg2+/-) 13...Re4?? (better 13...Ne4 14.Qd3 Bg3 15.Ng3 Ng3 16.Kf2 Nh1 17.Kg2 Qh4-+) 14.Nbc3 (14.g5 Bf4 15.Qd3 Bc1 16.gf6 Nc6+-) 14...Bg3? (better 14...Bf4 15.Qd3 Bc1 16.Ne4 de4+/-) 15.Kd1+- Rg4 16.Rg1?? (better 16.Bh3 Bh4 17.Qd3+-) 16...Bf4+/- 17.Nf4 (better 17.Qd3!? Rg1 18.Ng1 Bc1 19.Rc1+/-) 17...Rg1= 18.Qf2 Rh1 19.Bd2 (19.Qf3 Rh4=) 19...Ng4 (19...Nh5 20.Nh5 Rh5 21.Qf3=+) 20.Qf3 Pawn d5, live or die! (better 20.Qg2 c6 21.Kc1=) 20...Qg5?? (better 20...Rg1 21.Ke2 c6-/+) 21.Qh1?? (better 21.Ncd5 Qd8 22.Ne3 (22.Qg4?! Rf1 23.Be1 Rf4 24.Nf4 Qd4 25.Ke2 Nc6+=) 22...Qd4 23.Qb7+/-) 21...Nf2-+ 22.Kc1 Nh1 23.Nfd5 Qg1 (better 23...Qg3 24.Kb2 Nc6-+) 24.Ne3? (24.Nc7 Ng3 25.Kb2 Nf1 26.Na8-+) 24...Nc6 (24...Ng3!? 25.Kb2 Qf2 26.Ned5 Nf1 27.Rf1 Qf1 28.Nc7-+) 25.Kb2 Nd4 (better 25...Qh2 26.Bg2 Ng3-+) 26.Bg2 Ng3?? (better 26...Qf2 27.Ne4 Qf4-+) 27.Rg1+- 1-0. souleater99 – Escapingreality, Rated Classical game, lichess.org, 2014.

4.c3 d5 5.f4 (5.d4 Bd6=+) 5...Bg4 (5...ef4 6.ef4 Bd6 7.d4–/+) 6.Qa4 (6.Be2 Be2 7.Ne2 e4=+) 6...b5 (better is 6...ef4 7.ef4 Nh5–/+) 7.Bb5? (better is 7.Qc2 ef4 8.h3-+) 7...cb5-+ 8.Qb5 Bd7 9.Qb7 Nc6 10.d4 ef4 11.ef4 Rb8 12.Qa7?? Na7 (13.Nf3 Bd6-+; 12...Qe7 13.Kf1 Na7 14.Nf3-+) 0–1. Izzy5150 – andre2004, ChessWorld.net, 2005.

4.h3 d5+= 5.Nf3 Bd6 6.d4 e4 7.Nh2 Bf5 8.c4 0-0 9.Bd2 Qc7 10.Ng4 Nbd7 11.Nc3 h5 (11...dc4 12.Bc4 b5 13.Bb3+=) 12.c5 (12.Nf6 Nf6 13.cd5 cd5=) 12...Be7 (12...hg4 13.cd6 Qd6 14.hg4 Bg4 15.Qc2+=) 13.Nh2 a6 14.g4 hg4 15.hg4 Bg6 16.Be2 Nh7 17.a4 Ng5 18.a5 f6 19.Qc2 Kf7 20.f4?? (better is 20.Nf1=) 20...ef3-+ 21.Bd3 Bd3 22.Qd3 Rh8 23.0-0-0 Rh2 24.e4 de4 25.Qe4 (25.Ne4 Ne6 26.Rh2 Qh2 27.Qf3 Nd4 28.Qe3-+) 25...Ne4 26.Ne4 Rah8 27.Rhf1 f2! 28.Be3 R8h3 29.Bf2 Qf4 30.Rd2 Qe4 31.g5 Rc3 32.Kb2 Rc4 33.Re1 Qe1! 34.Be1 Rd2 35.Bd2 Rd4 36.Bc3 Rg4 37.gf6 Bf6 38.Bf6 Nf6 39.Kc3 Nd5 40.Kd3 Rb4 (40...Rb4 41.Ke2 Rb5-+) 0–1. nakpim – trompowsky, internet, 2013.

(--> 1.b4 e5 2.a3 d5 3.e3 Nf6).

4.Bb2 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6).

4.Bb2 Bd6 5.c4 c6 6.Nf3 Nbd7 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6).

4.Bb2 Nbd7 (--> 1.b4 e5 2.a3 d5 3.Bb2 Nd7 4.e3 Ngf6).

4.Bb2 e4 (--> 1.b4 e5 2.Bb2 e4 3.e3 d5 4.a3 Nf6).

4.c4 dc4 5.Bc4 (--> 1.b4 e5 2.a3 d5 3.e3 Nf6 4.c4 dc4 5.Bc4).

4.Bb2 0-0 5.Bc4 c5 6.c3 cb4 7.cb4 Qb6 8.Ba2 a5 9.Nc3 ab4 10.ab4 Qb4 11.Rb1 e4 12.Nge2 Be5 13.0-0 d5 14.Nd5 Nd5 15.Be5 Qe7 16.Bd5 Qe5 17.Nf4 Ra7 18.Rb5 Qe8 19.Bc4 Bd7 20.Rh5 g6 21.Ng6 hg6 22.Rh3 Kg7 23.Rg3 b5 24.Bb3 Be6 25.Be6 Qe6 26.Qh5 Rh8 27.Qb5 Nd7 28.f4 f5 29.Qe2 Nf6 30.h4 Nh5 31.Rh3 Qf6 32.g3 Re7 33.Kh2 Re6 34.Rg1 Rh6 35.g4 fg4 36.Rg4 Kf7 37.Qb5 Kg7 38.Qb7 Re7 39.Qd5 Rh7 40.f5 Re5 41.Rg6 Time forfeit 1-0. babypike - Leningrad1917, Rated Classical game, lichess.org, 2016. (=1.a3 e5 2.b4 Nf6)

4.Be2 0-0 (4...Be7 5.Bb2 e4 6.d3=) 5.Nf3 (5.Bb2 e4=) 5...e4=+ 6.Nd4 Be5 (6...a5 7.ba5 c5 8.Nb3=+) 7.0-0= Bd4 (7...d6 8.Nc3=+) 8.ed4 d5 (8...Nc6 9.Bb2 d5=) 9.Nc3 (9.d3 Nc6 10.de4 de4+=) 9...Be6 (9...Nc6!?=+) 10.d3= Bf5 (10...Nc6 11.de4 de4 12.Be3=) 11.Bg5+= h6 (11...ed3 12.Bd3 Bd3 13.Qd3+=) 12.Bf6+/– Qf6 (12...gf6 13.Qd2+/–) 13.Nd5 Qd8 (13...Qd6 14.Ne3 Bg6 15.de4 Be4 16.Re1+/–) 14.de4 (14.Ne3 Bg6+/–) 14...Be4 15.Nc3 Bg6 16.f4 (16.Bf3 c6+/–) 16...Nd7 (16...Bf5 17.Bf3 c6 18.Re1+/–) 17.f5 Bh7 18.Nd5 (18.Qd3 Re8+/–) 18...c6 19.Ne3 Qg5 20.Qd3 g6 21.Rf3 Qf6 22.fg6 Qg6 23.Nf5 Kh8 24.Raf1 Bg8 25.Rh3 (25...Bh7 26.Qc3+–) 1–0. lesbian14 – cervantes, Live Game Caissa's Web, 2006.

4.b5 Bc5 5.Nc3 0-0 6.Bc4 c6 7.bc6 (7.Qf3 Bd4 8.Nge2 d5 9.ed5 cb5 10.Bb5 Bg4=+) 7...bc6 (7...dc6 8.Nf3-/+) 8.Qf3=+ d5 9.ed5 cd5 (better is 9...e4!? 10.Qf4 cd5-/+) 10.Nd5= Nd5 11.Bd5 Ra6 12.d3 (12.Qe4 Rf6 13.Nf3 Rf4=+) 12...Nd7 (12...Rf6!? 13.Bg5 Rf3 14.Bd8 Rf2 15.Ba5 Rc2=) 13.Be3 Be3 (13...Qc7 14.Ne2=) 14.fe3+= Nf6 15.Bc4 Rb6 16.Qg3 e4 (16...Bb7 17.Ne2+= (17.Qe5?? Bg2 18.Rd1 Rb8-+)) 17.Ne2 ed3 18.cd3 Re8 (18...Be6 19.Be6 Qd3 20.Ba2=) 19.0-0+/– Be6 20.Be6 Ree6 (20...Rbe6 21.e4+/–) 21.Nd4 Re8 22.Rab1 Nd5 (22...Rb1 23.Rb1 Qc8 24.Qg5+/–) 23.Nf5 Rg6 24.Qf3 Nc3 (better is 24...Ne7 25.Nd4 Rf6+/–) 25.Rb3 Qd3 (25...Na4 26.Rb7 Kh8+–) 26.Nh6!! Kh8 (26...Rh6 27.Qf7) 27.Nf7 Kg8 28.Nh6!! Kh8 29.Qf8!! Rf8 30.Rf8# 1–0. mrkt (2350) – putzer (1720), ICC, 2003.

4.b5 Ne4 5.Qe2 Nf6 6.Qe5 Be7 7.Bb2 0-0 8.Qf4 Re8 9.Be2 d6 10.Nc3 d5 11.Nf3 Nh5 12.Qa4 Bf6 13.Kd1 =+.

4.d3 Nc6 5.Nf3 de4 6.de4 Ne4 7.Bc4 Qd1 8.Kd1 Nf2 9.Ke2 Nh1 10.Be3 Bg4 11.Nbd2 0-0-0 12.Rh1 Nd4 13.Kd3 Nf3 14.Ke4 f5 0-1. imc80 – Jaaaaaaaake, Rated Classical game, lichess.org, 2014.

4.ed5 Nd5 5.Nc3 Be7 (5...Nc3 6.dc3 Qd1 7.Kd1=+) 6.Bc4 c6 7.b5 (7.Qh5 0-0=) 7...0-0 (7...Nc3 8.dc3 Qd1 9.Kd1 cb5 10.Bb5 Nc6 11.Ke1-/+) 8.bc6 (8.Bb2 Nc3 9.Bc3 cb5 10.Bb5 Qd5-/+) 8...bc6 (8...Nc3 9.Qf3 Bc5 10.cb7 Bb7 11.Qb7-/+) 9.Nf3 (9.Qf3 Be6=+) 9...Bf6 (9...Nc3!? 10.dc3 Qa5=+) 10.Ne4= Bf5 11.d3 Nd7 12.a4 a5 13.Ba3 Re8 14.Bc5?? (better 14.0-0 Be7 15.Nfd2=) 14...Be4 (better 14...Nc5!? 15.Nc5 Nc3 16.Qc1-+) 15.de4 Nc3 (better 15...Nc5 16.ed5 e4-+) 16.Qd6?? (16.Qd3!? Nc5 17.Qc3 Ne4 18.Qb3-+) 16...Be7 (16...Ne4 17.Qc6 Ndc5 18.Rd1-+) 17.Qc6? (17.Bf7 Kf7 18.Qd7 Qd7 19.Ne5 Ke6 20.Nd7 Kd7 21.Be7 Ke7-+ (21...Re7?! 22.f3-/+)) 17...Rc8 (better 17...Bc5!? 18.0-0 Rc8 19.Qb7-+) 18.Be7? (better 18.Bf7!? Kf7 19.Qd7 Qd7 20.Ne5 Ke6 21.Nd7 Bc5 22.Nc5 Rc5 23.f3-+) 18...Qe7 (better 18...Re7 19.Bf7 Rf7-+) 19.Qb5?? (19.Qa6 Nb8 20.Bf7 Qf7 21.Qd3-+) 19...Nb5 20.Bb5 Qb4 21.Kd1 (21.Kf1 Rc2 22.Rd1 Rec8-+) 21...Rcd8 (better 21...Qe4 22.Nd2 Qg2 23.Rf1-+) 22.Kc1 Nb6 23.Rb1 (23.Be8 Nc4 24.Bf7 Kf7-+) 23...Qe4 (23...Qa3 24.Rb2 Na4 25.Ba4 Qa1 26.Rb1 Qa4 27.Ne1-+) 24.Nd2 (24.Be8 Qf4 25.Kb2 Re8 26.Rhe1-+) 24...Qg2 25.Rd1 Re6 26.Bf1 (26.Kb2 Red6 (26...Qh2?! 27.Nf3 Rb8 28.Nh2-/+) 27.Rg1 Qf2-+) 26...Qf2 27.Ne4 Qf4 (27...Rd1 28.Kd1 Qf1 29.Kd2 Qb1 30.Ke2 Qc2 31.Ke1 Qe4 32.Kf2 Rf6 33.Kg3 Qe3 34.Kg4 Rg6 35.Kf5 Rg5) 28.Nd2 Nc4! 29.Bc4 Rc6 (better 29...Red6 30.Bf7 Qf7 31.Rf1-+) 30.Bd5 Rd5 (better 30...Rc7 31.Rb3 Kf8-+) 31.Rb8 (31.Rb8 Rc8 32.Rc8 Rd8 33.Rd8) 1-0. shakuni – pavanpakar, Rated Correspondence game, lichess.org, 2014.

4.e4 Be6 5.Bb2 g6 6.c4 (6.Ne2 Bg7=+) 6...b6 (6...Bh6!?-/+) 7.Nc3=+ Bg7 (7...a5=+) 8.g4? (better 8.Bd3!?=) 8...0-0 9.h4 Nc6 10.g5 (10.h5 h6-/+) 10...Nh5-+ 11.Nge2 Bc4 12.b5 (better 12.Rc1-+) 12...Nd4?? (better 12...Na5-+) 13.Nd4= ed4 14.Nd5?? (better 14.Bc4!? dc3 15.Bc3 Bc3 16.dc3=) 14...Bf1?? (better 14...Bd5!? 15.ed5 Qe7 16.Kf2-+) 15.Kf1 (better 15.Rf1!? Qd7 16.Qc2-/+) 15...Ng3-+ 16.Kf2 Nh1 17.Qh1 a6 18.h5? (18.Rc1 Ra7 19.ba6-+) 18...Qg5 (better 18...ab5 19.Rc1-+) 19.Rd1? (19.f4 Qh5 20.Qh5 gh5 21.ba6 Ra6 22.Nc7-+) 19...ab5 20.Nc7 Rab8 (20...Rac8 21.hg6 hg6 22.Nd5-+) 21.Qh2 (21.Nd5 Rfc8 (21...gh5?! 22.f4 Qh6 23.Ne7 Kh8 24.Qf3-+) 22.f4 Qd8-+) 21...Be5 (21...Rbc8!? 22.f4 Qe7 23.Nd5 Qe4 24.Qh1 Qh1 25.Ne7 Kh8 26.Rh1-+) 22.Qh3 Bf4 (22...Rbc8 23.hg6 hg6 24.Nd5-+) 23.Rg1? (23.Bd4 Be5 24.Be3-/+) 23...Qc5 (better 23...Be3 24.de3 Qe3 25.Kg2 Qd2 26.Kh1 Qb2-+) 24.Ke1?? (24.Nd5 Be3! 25.de3 Qc2 26.Kg3 Qb2 27.Rh1 de3 28.hg6 Qf2 29.Kg4 h5 30.Kh5 Qf3 31.Qf3 fg6 32.Kg4 Rf3 33.Kf3+-) 24...Qc7 25.Bd4 (25.Rg4 d5! 26.Qh4-+) 25...Qc1 26.Kf2 Qd2 27.Kf1 Qd4 28.Kg2 Rbc8 29.hg6 fg6 (29...Rc2 30.Kh1 fg6 31.Qe6 Kh8 32.Qh3 Qb2 33.Qg2 Rg2 34.Rg2 Qb1 35.Rg1 Qc2 36.Rg2 Qd1 37.Rg1 Qf3 38.Rg2 Rc8 39.Kg1 Rc1) 30.Qe6 Kh8 31.Rh1 (31.Qa2 Rc5 32.Re1 Rg5 33.Kh1 Rh5 34.Kg2 Rh2 35.Kf1 Ra2 36.Re2 Qd1 37.Kg2 Qe2 38.Kh3 Qf3 39.Kh4 Rh2) 31...Rc2 32.Kh3 Qf2 33.Qg4 (33.Qf6 Rf6 34.Rg1 Qg1 35.Kh4 Rh2) 33...Qh2! 34.Rh2 (34.Rh2 Rh2 Mate attack) 34…Rh2 0-1. Paul593 - ITC01 (1750), ChessWorld.net, 2008.

4.g3 Be7 5.c4 e4 (5...0-0!?-/+) 6.Bb2=+ Nc6 (6...Bf5 7.Bg2 0-0 8.Nc3=) 7.Bg2 (7.fe4 Be6=) 7...ef3 (7...Ne5 8.Qc2 Be6 9.c5=) 8.Bf3 (8.Nf3 Be6 9.Qa4 0-0+= (worse 9...Bc4 10.b5+/-)) 8...Bg4 (8...Ne5 9.Qc2=+) 9.Bd5 (better 9.Bg4!? Ng4 10.Bg7+=) 9...Nd5=+ 10.cd5 Ne5 11.Be5 de5 12.h3 (12.Nc3 0-0-/+) 12...Bh5 (better 12...Qd5 13.Nf3 Bf3 14.ef3 0-0-+) 13.g4?? (better 13.Qa4 Qd7 14.Qd7 Kd7 15.g4=+) 13...Bh4-+ 14.Kf1 Qf6 (14...Qd5?! 15.Nf3 Bg6 16.Nc3-/+) 15.Nf3 e4 16.Qb3 (16.gh5 Qa1 17.Nh4 Qf6 18.Nf3 ef3 19.e4-+) 16...ef3 (16...Qa1?! 17.Nh4 0-0-0 18.Kg2-+) 17.ef3 (17.Qe3 Kd7 18.Qf3 Qa1 19.Qf5 Kd8 20.gh5-+) 17...Qa1 18.Qe3 (18.gh5 0-0-0 19.Rh2 Qe5-+) 18...Be7 (18...Kd8!? 19.Kg2 Bg6 20.d6-+) 19.gh5 (19.Kg2 Bg6 20.Nc3 Qa3-+) 19...Qb1 20.Kf2 (20.Kg2 Qf5 21.Re1-+) 20...Qh1 21.Kg3 g6 (21...Kd8 22.f4-+) 22.h6 0-0 23.Qe7 Rfe8 (better 23...Qg1 24.Kf4 Qh2 25.Ke3-+) 24.Qf6 Qe1 25.Kg4 Qg1 26.Kf4 Qh2 27.Kg4 Qe5 28.Qe5 Re5 29.f4 Re2 (29...Rd5 30.d4-+) 30.d4 Rd2 (30...f5 31.Kh4 Rae8 32.d6 cd6 33.Kg3 R8e3 34.Kh4 Rg2 35.a4 Re4 36.d5 Rf4) 31.Kg5 Rd4 (31...Rg2 32.Kf6 Rd8 33.f5 Rd5 34.a4 Kf8 35.fg6 Rg6) 32.h4 Rd5 33.Kg4 Re8 34.a4 Rd1 (34...f5 35.Kg3 Re2 36.h5 Rd3 37.Kh4 Rg2 38.hg6 Rg4 39.Kh5 hg6) 35.b5 Rg1 (35...Re3 36.f5 Rd4 37.Kg5 Rf3 38.Kf6 Re4 39.a5 Rf5) 36.Kf3-+ Ree1 0-1. sugarshaker - bjk97 (1685), Rated Classical game, lichess.org, 2014. (=1.a3 A00: Irregular Openings 1...e5 2.b4 Nf6)

4.c3 g6 5.d3 Bg7 6.g3 0-0 7.e4 Bg4 8.Bg2 Qe7 9.Bg5 Nbd7 10.Nbd2 Qe6 11.h3 Bf3 12.Bf3 c6 13.Bg4 Qe7 14.c4 h6 15.Bf6 Bf6 16.Rb1 b5 17.cb5 cb5 18.0-0 h5 19.Bd7 Qd7 20.Qf3 Kg7 21.g4 Rh8 22.Rfc1 Bg5 23.Qe2 hg4 24.hg4 Rh4 25.f3 Rah8 26.Kf2 Rh2 27.Kf1 Re2 28.Ke2 Rh2 29.Kd1 Rd2 30.Ke1 Rd3 31.Rd1 Rd1 32.Rd1 Bf4 33.Ke2 f5 34.ef5 gf5 35.gf5 Kf6 36.Rd5 Qc6 37.Rd3 Qc2 38.Rd2 Qf5 0-1. BENABDER – piecesofcake, Rated Classical game, lichess.org.

4.Nc3 Be7 5.e3 0-0 6.Be2 Nbd7 7.0-0 Re8 8.e4 Nf8 9.d4 Ng6 10.Re1 c6 11.b5 Bg4 12.Qd3 Rc8 13.Be3 b6 14.bc6 Rc6 15.Rad1 Rc3 16.Qc3 Ne4 17.Qc6 Qa8 18.Bb5 Rd8?? (better is 18...Nf6+=) 19.Qa8+– Ra8 20.Bc6 Rc8 21.Be4 f5 22.Bd5 Kh8 23.h3 Bh5 24.Rd2 (24.Be6 Bf3 25.gf3 Rf8+–) 24...f4? 25.g4 fe3 26.fe3 Bg4 27.hg4 h6 28.Be6 Rc3 29.Rd3 Rc2 30.Bf5 Nh4 31.Nh4 Bh4 32.Rf1 Bg3 33.Bg6 Kg8 34.de5 Be5 35.e4 Bh2 36.Kh1 Be5 37.Rf7 Rc1 38.Kg2 Rc2 39.Kf3 Rh2 40.Rd5 Rh3+– 41.Ke2 Rh2 42.Kd3 Rh3 43.Kc4 Rf3 44.Kb5 Rf7+= 45.Bf7 Kf7 0–1. trutmo (1670) – zenegblues (1845), kurnik, 2011.

4.e4 Be7 5.d3 0-0 6.Be2 a5 7.0-0 ab4 8.Bb2 ba3 9.Na3 Nbd7 10.Nc4 Ra1 11.Qa1 c6 12.Re1 Qc7 13.Bf1 b5 14.Ne3 Bb7 15.Nf5 Re8 16.d4 ed4 17.Bd4 Ne5 (better 17...Bf8=+) 18.Ne5+/- (worse 18.Be5 de5 19.Ne5 Bf8-/+) 18...de5 19.Be5 Qb6? (better 19...Qd7!?+/-) 20.Ne7+- Re7 21.Bf6 gf6 22.Qf6 Re6 23.Qf5 Rg6?? (23...c5 24.h3+/-) 24.Bd3 (better 24.Rd1 Kg7 25.e5+-) 24...c5+/- 25.f3?? (better 25.Re3+/-) 25...c4-+ 26.Kf1 cd3 27.cd3 b4 28.Qe5 Ba6 29.Rd1 Rd6 (better 29...Qd8!? 30.g3 Bd3 31.Kf2 Qb6 32.Kg2-+) 30.Qe8 Kg7 31.Qe5 Kf8 32.Qh8 Ke7 33.Qe5 Kd8 34.Qh8?? (34.Ke2-+) 34...Ke7 (better 34...Kd7 35.g3 Qe3-+) 35.Qe5 Kf8?? (better 35...Re6 36.Qb2 Qe3-+) 36.Qh8= Ke7 ½-½. Takeda (2465) - N3ubau3rGER (2190), Rated Bullet tournament nZs0VRj4, lichess.org, 2016.

4.Nd4 d5 5.e3 c5 6.bc5 Bc5 7.Bb2 Bd6 8.c4 Nc6 (8...0-0 9.cd5 Nd5 10.Qc2=) 9.Nc6 (better 9.cd5!? Nd5 10.Nc6 bc6 11.Bg7+/-) 9...bc6=+ 10.Be2 Qc7 (10...0-0=+) 11.0-0?? (better 11.Bf6 gf6 12.cd5 cd5 13.Nc3+=) 11...Bh2-/+ 12.Kh1 h5 (better 12...Be5 13.Be5 Qe5-/+) 13.g3?? (better 13.Bf6 gf6 14.Nc3+=) 13...Ng4 (better 13...Qd7 14.Rg1 h4-+) 14.Kg2?? (14.Qa4 Kf8 15.cd5 Bg3 16.Qe4-/+ (16.fg3?? Qg3 17.Be5 Qe5-+)) 14...Bg3 (better 14...Nf2 15.Rf2 Qg3 16.Kh1 Qf2 17.Qf1 Qh4 18.Qg2 Bc7 19.Kg1 Bh3 20.Be5 Be5 21.Qf2 Bg3 22.Qf3 ef3 23.Bf3 Bf2 24.Kh1 Bf1) 15.fg3= Be6?? (15...h4 16.Rf4 (16.Bg7 Qg3 17.Kh1 Qh2) 16...h3 17.Kh1 Qf4 18.ef4 Nf2 19.Kh2 Nd1 20.Bd1+=) 16.Bg4 (better 16.Rf4 0-0 17.Qh1 (17.Bg4?! Bg4 18.Qc1 Qd7+=) 17...dc4 18.Qh5+-) 16...hg4?? (16...Bg4 17.Qe1 Bf3 18.Rf3 ef3 19.Kf3=) 17.Rh1?? (better 17.cd5!? cd5 18.Bg7+-) 17...0-0-0 (17...Rh3 18.Qe1 f6 19.Nc3+/-) 18.cd5 (18.Bg7?! Rh3 19.Qe1 dc4+/-) 18...cd5? (18...Rh3 19.Rh3 gh3 20.Kh2 Bd5 21.Qg4 Be6 22.Qe4 Rd5+=) 19.Nc3+- Kb8?? (19...Rh3 20.Ne2 Rdh8 21.Rh3 gh3 22.Kh2+-) 20.Rb1 (20.Rh8 Rh8 21.Nb5 Qa5 22.Be5 Kc8 23.Nd6 Kd7+-) 20...Ka8? (20...Rh1 21.Qh1 (worse 21.Kh1 Qg3 22.Qb3 Ka8 23.Qb7 Kb7 24.Ba1 Kc6 25.Rb6 ab6 26.Ne4 Rh8) 21...Qc4 22.Qd1+-) 21.a4 (21.Nb5 Qd7 22.Rh8 Rh8+-) 21...Qd6?? (better 21...Rh3 22.Qe1 a6+-) 22.Nb5 Qd7 (22...Rh1 23.Qh1 (23.Nd6 Rd1 24.Rd1 Rd6=+) 23...Qc5 24.Bd4+-) 23.Bd4 (better 23.Qc2 Rh1 24.Nc7 Qc7 25.Qc7+-) 23...f5 (23...Rh1 24.Qh1 g5+-) 24.Na7 (24.Qc2 Rh2 25.Rh2 Rc8 26.Rh8 Qb7 27.Nc7 Kb8 28.Qc6 Qb1 29.Na6) 24...Rh1 25.Qh1 g5 (25...Rb8 26.Rb8 Kb8 27.Qb1 Qb7 28.Nb5+-) 26.Qh6 f4 (26...Rb8 27.Nb5 Rc8 28.Qg5 Rc6+-) 27.gf4 gf4 28.Qf4 (28.ef4 e3 29.Nb5 Rc8+-) 28...Rg8 (28...g3 29.Nb5 Rc8 30.Be5+-) 29.Kg3 (better 29.Rb6 Qf7 30.Nb5 Qf4 31.ef4+-) 29...Qd8 (29...Qh7 30.Nb5 Qh3 31.Kf2 g3 32.Ke1 Qh1 33.Qf1 Qf1 34.Kf1 Bh3 35.Kg1 Kb7 36.Nc3 Kc6 37.Rb6 Kd7 38.Nd5 Rc8 39.Nf6 Kd8+-) 30.Qe5 (30.Nb5 Kb7 31.Nc7 Kc8 32.Ne6 Qh4 33.Kh4 Rh8 34.Bh8 Kd7 35.Qf7 Kd6 36.Rb6) 30...Bc8?? (better 30...Qf8 31.Qf6 Qf6 32.Bf6 Ka7 33.Bd4 Ka8+=) 31.Nc6 (31.Rb8) 31...Bb7 32.Qe6 (32.Nd8 Rf8 33.Rb7 Rf3 34.Kh4 Rh3 35.Kg5 Rh5 36.Kh5 g3 37.Ra7) 32...Qe8 33.Qe8 (33.Rb7 Kb7 34.Na5 Kc7 35.Be5 Kd8 36.Nb7) 33...Re8+- 34.Ne5 Rd8 35.a5 Ba6 (35...Rd6+-) 36.Rb6 Bd3 (36...Bf1 37.a6 Rb8 38.Rb8 Kb8 39.a7 Ka8 40.Ng6+-) 37.a6 (37.a6 Rg8 38.Nd7+-) 1-0. GM_HUSARZ (2080) - gorneto (2050), Rated Bullet game, lichess.org, 2015.

4.Nd4 d5 5.e3 c5 6.bc5 Bc5 7.Bb5 Nbd7 (7...Bd7 8.Bd7 Nbd7 9.Bb2=+) 8.Nc3 (8.Bb2=) 8...b6 (8...0-0 9.0-0=+) 9.Nc6 (better 9.Bc6!? Rb8 10.Nd5 Nd5 11.Bd5=) 9...Qc7=+ 10.0-0? (10.Nb4 Bb7=+) 10...Bb7?? (10...a6 11.Ba4 b5 12.Bb5 ab5 13.Nd4-+) 11.Nd5?? (better 11.Nd4=+) 11...Nd5-+ (11...Bc6?? 12.Nc7 Kd8 13.Bc6 Kc7 14.Ba8 Ra8 15.Bb2+–) 12.Qh5 (12.Nd4 a6 13.Bd7 Qd7-+ (13...Kd7?! 14.Qg4 Kd8 15.Qg7-+)) 12...N7f6 (better 12...Bc6 13.Bc6 Qc6-+) 13.Ne5 (13.Nd4 Kf8 14.Qd1 Rc8-+) 13...Kf8 14.Qf5 Bd6 15.Bb2 Re8! 16.Ng4?? (16.Be8 Qc8 Double attack (16...Qc8 Decoy)) 16...Re7 (better 16...Bc8!? 17.Nf6 Nf6 18.Qg5-+) 17.Nf6 Nf6 (17...gf6 18.Qh3 Qc2 19.Bf6 Nf6 20.Qh6 Kg8 21.Qg5 Kf8 22.Qh6 Kg8 23.Qg5 Kf8 24.Qh6=; worse 17...Bh2 18.Kh1 Nf6 19.Bf6 gf6 20.g3 Bg3 21.fg3-+) 18.g3? (18.Bf6 gf6 19.h3 a6-+ (19...Qc2?! 20.Rac1 Qb2 21.Rc8 Bc8 22.Qc8 Kg7 23.Qg4 Kh6 24.Qh4 Kg6 25.Qg4 Kh6 26.Qh4 Kg7 27.Qg4 Kh6=)) 18...Qc2 (better 18...Bc8 19.Qg5 h6-+) 19.Bf6 gf6 20.Qf6?? (better 20.Rac1 Qb2 21.Rc8 Bc8 22.Qc8 Kg7 23.Qg4 Kh6 24.Qh4 Kg6 25.Qg4 Kh6 26.Qh4 Kg7 27.Qg4 Kh6=) 20...Re6?? (20...Be5 21.Qh6 Bg7 22.Qd6-+) 21.Rac1 (better 21.Qh8 Ke7 22.Rac1+– (22.Qh7?! Qb3 23.Rab1 Qd5+–)) 21...Rf6-+ 22.Rc2 Ba3 23.Rfc1 (23.Ra1 Rf5 24.Bc6 Bc6 25.Ra3-+) 23...Bc1 24.Rc1 a6 25.Rc7 ab5 26.Rb7 Kg7 (26...Rd6 27.Rc7-+) 27.g4 (27.Rd7 Rc8 28.Kg2 Rc4-+) 27...h6 (27...Rd8 28.g5 Re6 29.Ra7-+) 28.h4 (28.Rd7 Rc8-+) 28...Rd8 29.g5 hg5 30.hg5 Rg6 0–1. Zdana,Ludek (1800) – Goldmund,Heike, FICGS, 2016.

4.Bb2 Qc7 +=.

4.b5 d5!?-/+.

4.b5 Bd6 5.Bg2 e4 6.e3 (6.Bb2 0-0=) 6...0-0 7.c4 a6 (7...Be5 8.d4 ed3 9.Ra2-/+) 8.Nc3 (8.ba6 Na6 9.Bb2 Re8=) 8...ab5 (8...Be5 9.ba6 Na6 10.Bb2+=) 9.cb5 (9.Ne4 Ne4 10.Be4 bc4+=) 9...Be5-/+ 10.Nge2 Ra5 11.a4 d5 12.0-0 b6 (12...Bf5 13.f3 Qd7 14.Ba3+=) 13.Rb1 (13.d4 ed3 14.Qd3 Bg4+=) 13...Ng4 (better is 13...Bf5!?-/+) 14.d4 cd4 (14...ed3 15.Qd3 d4 16.ed4 cd4 17.Ne4 Ra4 18.Bg5+=) 15.Nd4 (15.ed4 Bc7+=) 15...Ra7 16.Nce2 (16.f4 ef3 17.Rf3= (worse is 17.Bf3 Nh2 18.Rf2 Bg3-/+)) 16...Nd7?? (better is 16...Re8=) 17.Nc6+– Qf6?? (better is 17...Qc7+–) 18.Na7 Bb7 (18...Qh6 19.h3 Ngf6 20.Nc6+–) 19.Nf4 g5 (19...Qg5+–) 20.Qg4 Kh8 (20...Nc5+–) 21.Qd7 gf4 22.ef4 Bc8 23.Nc8 (23.Nc8 Bc3 24.Ba3+–) 1–0. sacaniev – dizainer, kurnik, 2014.

4.c3 d5 5.Bg2 Be7 6.d3 0-0 7.Nf3 Qc7 8.0-0 a6 (8...Bg4 9.h3 Be6 10.Ng5+=) 9.Bg5 (9.bc5 Bc5 10.Ne5 Qe5=) 9...Be6 (9...cb4 10.cb4 Nc6 11.Nc3+=) 10.Bf6 (10.bc5 Bc5 11.d4 Bd6=) 10...Bf6 11.bc5 Qc5 12.d4 ed4 13.cd4 Qa5 14.h4 Nc6 15.e3 Rac8 16.Qd3 Nb4 (16...Rc7 17.Nbd2+=) 17.Qd2 Be7 18.Nc3 (18.Ra2 Nc6=) 18...Nc2-/+ 19.Qc2 Rc3 20.Qb2 b5 (20...Ra3?! 21.Ra3 Qa3 22.Qb7=) 21.Ng5 Bg5 22.hg5 Rfc8 (22...Rc4 23.f4 Qc7 24.f5+=) 23.Bf3 (better is 23.Rfc1!?=) 23...Rc2-/+ 24.Qb1 Qd2 25.Bd1?? (better is 25.Qb4-/+) 25...Rb2-+ 26.a4 (26.Qb2 Qb2 27.Bf3 Rc2-+) 26...Rb1 27.Rb1 b4 (better is 27...Bh3!? 28.Bf3 Bf1 29.Rf1 ba4 30.Bd5-+) 28.Bb3 Rc3 29.Kg2 (29.g6 hg6 30.Rfd1 Qe2-+) 29...Qd3 30.Rbd1 (30.Ba2 b3 31.Bb3 Rb3 32.Rb3 Qb3-+) 30...Rb3 (better is 30...Qe4 31.Kh2 Rb3-+) 31.Rd3 Rd3 32.a5 Ra3 33.Rb1 (33.Rc1 Ra5 34.Rc6 b3-+) 33...Ra4 (33...b3!? 34.g4 Bg4 35.Kg3-+) 34.Kf3 Kf8 (better is 34...Bf5!? 35.Rb2 Bd3 36.e4-+) 35.Kf4 f6 36.gf6 gf6 37.g4 Ke7 38.f3 Kd6 39.e4 (39.Rb2 Bf7-+) 39...de4 40.fe4 Ra5 (better is 40...b3 41.Ke3-+) 41.Rb4 Rb5 42.Ra4 a5 43.d5 Bd5! 44.ed5?? (44.Rd4-+) 44...Rb4 (44...Kd5?! 45.Kf5-/+) 45.Rb4 ab4 46.Ke4 b3 47.Kd3 b2 (better is 47...Kd5 48.Kc3-+) 48.Kc2 Kd5 49.Kb2 Ke4 50.Kc2 Kf4 51.Kd2 Kg4 52.Ke2 h5 53.Kf2 Black now must not overlook the idea f5 53...h4 54.Kg2 h3 55.Kh2 f5 56.Kh1 Kg3 57.Kg1 f4 58.Kh1 f3 59.Kg1 f2 60.Kf1 h2 61.Ke2 f1Q! 62.Kf1 h1Q 63.Ke2 Qe4 (63...Qd5 64.Ke3 Qe5 65.Kd3 Kf4 66.Kc4 Qe3 67.Kb5 Qe4 68.Kc5 Ke5 69.Kb5 Kd6 70.Kb6 Qb4 71.Ka6 Kc6 72.Ka7 Qb7) 64.Kd2 (64.Kd1 Qc4 65.Kd2 Kf3 66.Kd1 Ke3 67.Ke1 Qe2) 64...Kf3 (64...Qc4 65.Kd1 Kf4 66.Kd2 Kf3 67.Kd1 Qa2 68.Kc1 Ke3 69.Kd1 Qd2) 65.Kc3-+ Ke2 0–1. sacaniev – 0limpkurnika, kurnik, 2013.

4.Bb2 Bd6 5.e3 0-0 6.Nf3 Re8 7.Be2 h6 8.d4 e4 9.Ne5 Be5 10.de5 Nh7 11.0-0 Qg5 12.Bg4 Bg4 13.hg4 Qd8 14.f4 ef3 15.Qf3 Ng5 16.Qf4 c6 17.Nd2 Nd7 18.Nf3 Nf3 19.Rf3 Qe7 20.e6 Qe6 21.Bd4 Rf8 22.g5 hg5 23.Qg5 f6 24.Qg6 b6 25.Rg3 Rf7 26.Qh6 Re7 27.Rf1 c5 28.bc5 bc5 29.Bf6 Nf6 30.Rf6 Qe5 31.Rfg6 Qa1 32.Kh2 Rae8 33.Qh5 Re3 34.Qd5 Kf8 35.Rf3 Rf3 36.Qf3 Kg8 37.Qd5 Kh7 38.Ra6 Qe5 39.Qe5 Re5 40.Ra7 Re2 41.c4 Rc2 42.a4 Rc4 43.a5 Rh4 44.Kg1 c4 45.a6 c3 46.Rc7 Rb4 47.a7 Normal 1-0. hrom (1610) - vikare (1750), Rated Classical game, lichess.org, 2016. (=1.a3 e5 2.b4 Nf6)

4.Bb2 Bd6 5.e3 Be6 6.Nc3 0-0 7.Nf3 Nbd7 8.Be2 c5 (8...c6 9.0-0=+) 9.bc5= Nc5 10.0-0 (10.Nb5 e4 11.Bf6 gf6=) 10...Qd7 (10...Ncd7 11.Rb1=+) 11.Ng5 (11.Nb5 e4 12.Ne5 Qe7=) 11...Bf5 Black plans e4 12.Nf3 Bh3 13.gh3 Qh3 (13...e4 14.Ne1 Qh3-/+) 14.Nh2 (14.Nb5 Ng4 15.Nd6=) 14...e4-/+ 15.f4 ef3 16.Nf3 Nce4 (16...Qg4 17.Kh1 Nh5 18.Bb5-+) 17.Ne4 Ne4 18.Be5?? (better 18.Rf2 Nf2 19.Kf2 Qg3 20.Kf1-/+) 18...Be5-+ 19.Ne5 Qg3 20.Kh1 Qe5 21.Rf3 (21.Rf4 Ng3 22.Kg2 Ne2-+) 21...f5 (21...Nd2 22.Rh3 Ne4 23.Qg1 Nf2 24.Qf2 Qa1 25.Kg2 Qa3 26.Bd3-+) 22.Bd3 (22.d4 Qe6-+) 22...Rf6 (22...Nd2!? 23.Rh3-+) 23.Be4 Rh6 24.Kg2 Qh2 (24...fe4 25.Rg3 Rf8 26.Rb1-+) 25.Kf1 fe4 26.Rf2 Qh1 (better 26...Rf8 27.Rf8 Kf8-+) 27.Ke2 Qh5 28.Ke1 Qh4 29.Qe2 Rf8 30.d3 Rhf6 31.de4 Rf2 32.Qb5 Qh1 (32...Qh1 33.Qf1 Qf1) 0–1. tetis (1640) – pete59 (1735), gameknot.com, 2018.

4.g4 h6 5.Bg2 e4 6.Bb2 Be7 (6...c5 7.b5=+) 7.d3 Be6 (7...ed3!? 8.Qd3 a5=) 8.de4+= de4 (8...Ne4 9.Bg7 Rg8 10.Be4 Rg7 11.Bd3+=) 9.Qd8+/- Bd8 10.Bf6?? (better 10.Nc3+/-) 10...Bf6-/+ 11.c3 Bd5 12.e3 Bc6 (better 12...a5!? 13.ba5 Nd7-/+) 13.Ne2= Nd7 (13...a5 14.b5 Bb5 15.Be4=) 14.Ng3 (14.Nd2 a5 15.Rd1 Ba4+/-) 14...0-0 (14...a5!? 15.Ra2 Be7=) 15.Ne4 Be4 16.Be4 c6 17.Ke2 Rfe8 18.f3 Ne5 (18...Be5 19.Bd3+/-) 19.Rd1 Rad8 20.Rd8 Rd8 21.Nd2 b6 (21...Nd7 22.Rc1+/-) 22.Rd1 b5 (22...g5 23.f4 gf4 24.ef4+-) 23.f4 Nc4 24.Nc4 Rd1 25.Kd1 bc4 26.Bc6 (better 26.Kd2!?+-) 26...Bc3+/- 27.Kc2 (27.Bd5 Bb2+/-) 27...Be1 28.b5 Bf2 29.e4 Bg3 30.f5 g6 (30...Be5 31.a4+-) 31.fg6+- fg6 32.Kc3 Bd6 (32...Kf7 33.Kc4 Ke6 34.Bd5 Kd6 35.Bf7+-) 33.a4 Kf7 (33...Bc7 34.Kc4 Kf7 35.Kb4+-) 34.Kc4 (34.a5 Bc7 35.b6 ab6+-) 34...Ke6 (34...Bc7 35.Kb4+-) 35.a5 Bc7 36.a6 (better 36.b6!? ab6 37.a6+-) 36...Bb6 37.Bd5 (37.h4 Ke5+-) 37...Ke5 38.Kd3 h5 (better 38...g5!?+/-) 39.gh5+- gh5 40.Bf7 (40.h4!? Bd8+-) 40...h4 41.Bd5 Kf4 42.Ke2 Kg3?? (42...Bd4 43.Bc6+-) 43.Be6 (better 43.e5 Kf4 44.e6+-) 43...Kf4 44.Kd3 Ke5 45.Ke2?? (better 45.Bc4!?+-) 45...Ke4?? (better 45...Ke6 46.Kf3 Ke5-+) 46.Kf1 Kf3 47.Bg4 Kf4 48.Kg2 Ke4 49.Bf3 Kf4 50.Be2 Ke3 51.Bc4 Kd4 52.Bf1 Ke3 53.Bd3?? (53.Kh2 Kf2 54.Bd3 Bc7 55.Kh1 Bb6=) 53...Kd4 (53...Kd3 54.Kf3-+) 54.Kf3?? (better 54.Bf5+=) 54...Kd3-+ 55.Kg4 Bf2 (55...Kc4 56.Kh4 Bd8 57.Kg3 Kb5 58.Kf4-+) 56.b6 Bb6 (56...ab6?? 57.a7+-) 57.Kh4 Bf2 (57...Kc4 58.Kg4-+) 58.Kg4 Kc4 59.h4 Kb5 60.h5 Bd4 61.Kf5 (61.Kf4 Ka6 62.Ke4 Bg7-+) 61...Ka6 62.h6 (62.Ke4 Bg7 63.Kd3-+) 62...Kb6 63.h7 a5 64.Kg6 a4 65.Kf7 a3 66.Kg8 a2 67.h8Q Bh8 68.Kh8 a1Q 69.Kg8 Qf1 70.Kh7 (70.Kg7 Qf5 71.Kh6 Kc5 72.Kg7 Qg5 73.Kf8 Kd5 74.Kf7 Qf5 75.Kg8 Ke6 76.Kg7 Qg4 77.Kh6 Kf6 78.Kh7 Qg7) 70...Kc6 (70...Qf6 71.Kg8 Kc5 72.Kh7 Kd5 73.Kg8 Qe7 74.Kh8 Ke5 75.Kg8 Kf6 76.Kh8 Qg7) 71.Kh6 (71.Kg8 Kd6 72.Kg7 Ke5 73.Kg6 Qf6 74.Kh5 Qg7 75.Kh4 Kf4 76.Kh5 Qg5) 71...Kd6 (71...Qf5 72.Kg7 Kd5 73.Kg8 Ke6 74.Kg7 Qg4 75.Kh6 Kf6 76.Kh7 Qg7) 72.Kg6 (72.Kg7 Ke5 73.Kg6 Qf6 74.Kh5 Qg7 75.Kh4 Kf4 76.Kh5 Qg5) 72...Ke6 73.Kg5 Qf5 74.Kh6 (74.Kh4 Qf3 75.Kg5 Qg3 76.Kh5 Kf5 77.Kh6 Qg6) 74...Qg4 75.Kh7 Kf6 76.Kh8 (76.Kh6 Qg6) 76…Qg7 0-1. chycha – chanakya, Rated Blitz game, lichess.org, 2014. (=1.a3 A00: Irregular Openings 1...e5 2.b4 Nf6)

4.c3 Be6 5.Nf3 Bd6 6.Qc2 Nbd7 7.d4 e4 8.Ng5 Qe7 9.a4 (9.c4!? dc4 10.Ne4 Ne4 11.Qe4=+) 9...Bf5-/+ 10.g3 h6 11.Bf4?? (better is 11.Nh3-/+) 11...hg5-+ 12.Bg5 0-0-0 (13.Nd2 Nf8-+) 0–1. Izzy5150 – dugmak, ChessWorld.net, 2005.

4.e3 a5 5.Bb2 ab4 6.ab4 Nbd7?? (better is 6...Ra1 7.Ba1 Bd6-/+) 7.Ra8+– Bd6 (7...Bb4 8.Nf3 Nb6 9.Ra7+–) 8.g3 1–0. 2buddies – Jaque_mate, ChessWorld.net, 2015.

4.Qa4 b6 5.b5 Bc5 6.Bb2 0-0 7.e3 Re8 8.Be2 Bb7 9.Nf3 e4 10.Nd4 d6 11.0-0 Nbd7 12.Qc2 Ne5 13.Nc3 Qd7 14.f4 Bd4 15.ed4 Ng6 16.Nd1 d5 17.f5 Ne7 18.Ne3 dc4=+ 19.Bc4 Ned5 20.a4 Nb4 21.Qb3 Re7 22.Rac1 Qd6 23.Be2 Rd8 24.Nc4 Bd5 25.Qe3 Red7?? 26.Nd6+– Rd6 27.Rc7 (27...h6 28.Rfc1+–) 1–0. Tessieri,Franco – Niewold,Jaap (1730), TE.2004.P.01702, 2004.

4.Bb2 ab4 5.ab4 Ra1 6.Ba1 d5 7.c5 d4 8.d3? (better 8.e3=+) 8...Nd5-+ 9.Nf3 Nb4 10.Ne5 Bc5 11.Qa4 (11.Nf3 0-0-+) 11...c6 12.Nf3 (12.Kd1-+) 12...b5 13.Qb3 Qa5 (13...Qa5 14.Bd4 Bd4-+) 0–1. jlbaf (2430) – pcmvr, net–chess.com, 2016.

4.b5 a4 5.Bb2 d6 6.e3 Be6 7.Nf3 g6 (7...Be7 8.Nc3=) 8.Be2 Bg7 9.0-0 Nbd7 10.Nc3 0-0 (10...Nb6 11.d3+=) 11.Na4+– c5 12.Nc3 Nb6 13.d3 Na4?? (better 13...Qe7+–) 14.Na4+– b6 15.Nc3 Qd7 16.Nd2 Rfe8 (16...d5 17.f4 ef4 18.Rf4+–) 17.Bf3 (better 17.Nde4 Ne4 18.de4 Red8+–) 17...Ra7 (17...d5 18.cd5 Nd5 19.Nd5 Bd5 20.Bd5 Qd5 21.Nc4+–) 18.Nb3 (better 18.Bc6!? Qe7 19.Be8 Qe8+–) 18...Qd8 (18...d5 19.cd5 Nd5 20.Qc2+–) 19.a4 (19.Bc6 Bd7+–) 19...Rae7 (19...d5 20.cd5 Nd5 21.Nd5 Bd5 22.Bd5 Qd5 23.Qc2+–) 20.e4 (20.a5 Ra7+–) 20...Qd7 (20...Ra7 21.Be2+–) 21.a5 ba5 22.Na5 Rd8 (22...Ra8 23.Qd2+–) 23.Nc6 Ree8 24.Nd8 Rd8 25.Ra6 Bg4 (25...Qc7 26.Qe2+–) 26.Bg4 Ng4 27.h3 Nf6 28.Qa4 Ne8 (28...h6 29.Qa5+–) 29.Ra1 Nc7 (29...Nf6 30.Ra8 Qe7 31.b6+–) 30.Ra7 Rc8 31.Nd5 Kf8 32.Nb6 Qd8 33.Nc8 Qc8 34.b6 Ne8 35.Ra8 Qa8 36.Qa8 (36.Qa8 h5 37.b7 Bh8 38.b8Q Kg8 39.Qe8 Kg7 40.Qh8) 1–0. jlbaf (2430) – vipernsx (2190), net–chess.com, 2016.

4.b5 d5 5.e3 d4 6.Bb2 Bc5 7.Nf3 Bg4 8.h3 Bf3 9.Qf3 e4 10.Qf5 0-0?? (better is 10...Bd6 11.ed4 h6+=) 11.Qc5+– b6 (11...de3 12.de3 Nbd7 13.Qf5+–) 12.Qd4 1–0. barborski – kron10, kurnik, 2012.

5.a4 0-0-/+ 6.d3 (6.Nc3 d5 7.cd5 Nd5-/+) 6...c6 (6...d5 7.Ba3 Bb4 8.Nd2-+) 7.h3 (7.Ba3!? Bb4 8.Nd2-/+) 7...d5-+ 8.Nd2 (8.Ba3 Nbd7 9.Bc5 Nc5-+) 8...dc4 9.Nc4? (9.Ba3 Ba3 10.Ra3 cd3 11.e4-+) 9...cb5 10.ab5 Qd4 (better 10...Ne4 11.e3 Bb4 12.Nd2 Nc3-+) 11.Bb2?? (better 11.Be3 Bb4 12.Bd2 Bd2 13.Nd2-/+) 11...Bb4-+ 12.Nd2 Qb2 13.g4 (13.Ngf3 Be6 14.Qb1-+) 13...Bd2 14.Qd2 Qa1 15.Qd1 Qd4 Black plans a4 (15...Qb2 16.Nf3-+) 16.e3 Qd7 (16...Qb4 17.Qd2-+) 17.f3 a4 18.d4 a3 19.Bc4 a2 20.Qa1 ed4 21.Ne2 d3 (better 21...de3 22.0-0 Qd2 23.Ng3-+) 22.Nc3 d2 (better 22...Qc7 23.Bb3 Ra3 24.Kf2 Rb3 25.Na2 Qc2 26.Kg3-+) 23.Kd1 Re8 24.Ke2 Ra3 (24...Qd4 25.Bf7 Kf7 26.Ne4 Qc4 27.Kf2 Ne4 28.fe4 Qe4 29.Rf1 Kg6 30.b6 Rf8 31.Ke2 Qc2 32.Qd1 Qc4 33.Kd2 Rd8 34.Ke1 Rd1 35.Kf2 Rf1 36.Kg3 Qe2 37.e4 Qf2) 25.g5 Nh5 (25...Qd4 26.Bf7 Kf7 27.g6 hg6 28.Kf1 Qe3 29.Kg2 Qg5 30.Kf2 Rc3 31.Qa2 Nd5 32.Rb1 Rf3 33.Kf3 Re3 34.Kf2 Qg3 35.Kf1 Bh3) 26.Rg1 Nf4 27.Kd1 Re3 28.Ne4 Rf3 29.Nd2 Rf2 30.Qb2 (30.Qa2 Ra2 31.Bf7 Kf7 32.g6 Ng6 33.Kc1 Qd2 34.Kb1 Bf5) 30...a1Q 31.Kc2 (31.Qc1 Qd2) 31…Qd2 (31...Rd2) 0-1. Paul593 - Michael008, ChessWorld.net, 2008.

5.Bb2 d6 6.d4 Bd4 7.Bd4 ed4 8.Qd4 Nbd7 9.Nd2 Nc5 10.Ngf3 0-0 11.e3 Bf5 12.Be2 Re8 13.0-0 Nfd7 14.Rfe1 Bg6 15.Ra2 Ne6 16.Qc3 h6 17.Bd1 Nec5 18.Bc2 Bc2 19.Rc2 Ne5 20.Nd4 Qf6 21.Rf1 Qg6 22.N4b3?? (better 22.Rd1=) 22…Na4-+ 0–1. mgilbert (2100) – pcmvr, net–chess.com, 2016.

5.Nc3 d5 6.cd5 Nd5 7.Nd5 Qd5 8.a4?? (better 8.Bb2=+) 8...Qd4-+ 9.e3 Qa1 10.Nf3 Nd7 11.Bc4 Nb6 12.Qc2 (12.Bb3 Bf5-+) 12...Bd6 13.0-0 (13.Bb3 Be6 14.Be6 fe6-+) 13...Qa4 14.Qa4 Na4 15.Ng5 0-0 16.h3 (16.d4 ed4 17.ed4 Bf5-+) 16...Nb6 17.Ba2 (17.Bd3 h6 18.Ne4 Rd8-+) 17...Bd7 18.Bb1 Bb5 19.Nh7 Bf1 20.Nf8 Bb5 21.Nh7 a4 22.Ng5 (22.Bb2 Nc4 23.Bc3 a3-+) 22...a3 23.Ba2 (23.Ne4 a2 24.Ba2 Ra2-+) 23...Bc4 24.Bb1 (24.Bc4 Nc4 25.Ba3 Ra3-+) 24...a2 25.Bh7 Kh8 26.Bb2 a1Q (26...a1Q 27.Ba1 Ra1 28.Kh2 g6-+) 0–1. vipernsx (2190) – pcmvr, net–chess.com, 2016.

5.e3 0-0 6.Nf3 Re8 7.Nc3 d6 8.Bb2 Nbd7 9.Be2 e4 10.Nd4 Bd4 11.ed4 d5 12.Qb3 Nb6 (12...dc4 13.Bc4 Re7 14.0-0=+) 13.c5= Nc4 14.h3 (14.Bc4 dc4 15.Qc4 Nh5=) 14...b6 (14...Be6 15.Qc2=+) 15.Nd5 (15.Bc4!? dc4 16.Qc4=) 15...Nb2=+ (worse 15...Qd5 16.Bc4 (16.Qc4?! Qg5=) 16...Qh5 17.Qg3+–) 16.Nf6 Qf6 17.Qb2 Qg5 (17...bc5 18.Rc1 cd4 19.Rc7-/+) 18.Bf1= Bb7 19.Rc1 Rad8 20.Rc2 h6 21.Qc3 Qf6 The backward pawn on d4 becomes a target 22.Bc4 Qd4 23.Qd4 Rd4 24.Ke2 (24.c6 Bc8=) 24...Red8 (24...bc5 25.Ke3=+) 25.Ke3 (25.c6 Bc8=) 25...Kf8 26.cb6 cb6 27.h4 f5 28.g3 Ke7 29.h5 R8d7 30.Be2 Ke6 31.Re1 Ke5 32.Rec1 Ra4 33.Rc3 Re7 34.Bd1 Rd4 35.Be2 Rdd7 36.a4 Kd6 37.Rc4 Ke6 ½–½. pierred (2775) – pcmvr, net–chess.com, 2016.

5.e3 d5 6.cd5 Nd5 7.Nf3 e4 8.Qc2 ef3 9.Qc5 fg2 10.Bg2 Be6 11.Nc3 Nd7 12.Qd4 Nc3 (12...N7f6 13.Rg1+–) 13.Qc3 Nb6? (better 13...Rb8 14.Qg7 Rf8+–) 14.Qg7+– Rf8 15.Bb7 (worse 15.Qh7 Qg5 16.Qe4 Rg8+–) 15...Rb8 (15...Ra7 16.Bc6 Bd7 17.Bg2+–) 16.Bc6 Bd7 (16...Nd7+–) 17.Qe5 Qe7 18.Qc7 Qd8 (18...Rc8 19.Bd7 Qd7 20.Qb6 Qd5+–) 19.Qe5 Qe7 20.Qb8 Nc8 (20...Qd8 21.Qe5 Qe7+–) 21.Qc8 Qd8 22.Bd7 Ke7 23.Qc5 (better 23.Qd8 Rd8 24.Bc6 Kd6+–) 23...Kd7 24.Qc6 Ke7 25.a4 Re8 26.Ba3 Qd6 27.Qd6 1–0. pcmvr – vipernsx (2190), net–chess.com, 2016.

4.Bb2 Qc7 5.Qb3 Nc6 6.b5 Nd4 7.Qa4 b6 (7...Be7 8.e3 Nf5 9.d3=) 8.e3= Ne6 9.d3 Bb7 10.Nf3 e4 (10...Bd6!?=) 11.de4+= Ne4 12.Nc3 (12.Bd3 Be7+=) 12...Nc3= 13.Bc3 Bf3 (13...Bd6!?=) 14.gf3+= Bd6 (14...a6 15.Bg2+=) 15.f4+/– 0-0 (15...a6 16.ba6 0-0 17.Bg2+/–) 16.Qc2 (16.Bg2 Rae8 17.0-0-0 f5+/–) 16...Rae8 (16...a6 17.Bd3 h6 18.f5+/–) 17.0-0-0+/– Be7 (17...a6 18.Qd2 Be7 19.Qd7 Qd7 20.Rd7 ab5 21.cb5+/–) 18.Rg1 (18.f5 Nd8+–) 18...Rd8 (better is 18...f5!?+–) 19.Bd3 g6 (19...Rfe8 20.Bh7 Kf8 21.f5+–) 20.f5 Nf4 (20...a6 21.ba6 Qa7 22.fg6+–) 21.fg6 Nd3 22.Qd3 (22.Rd3?! fg6 23.Rd5 Rf6 24.Bf6 Bf6+–) 22...fg6 23.Rg6 Kf7 24.Rg7 Ke8 25.Re7! Ke7 26.Qe4 Kf7 27.Rg1 (27.Rg1 Qe5 28.Qe5 Rh8 29.Rg7 Kf8 30.Qe7#) 1–0. Kazimierski,Tomasz (1760) – Che Ahmed,Che Hassan, IECC, 1999.

4.b5 d5 5.cd5 Nd5 6.e3 Be7 7.Bb2 Bf6 8.Qc2 b6 9.Bc4 Bb7 10.Nf3 Nd7? (10...Qe7 11.e4 Nf4 12.0-0=) 11.h3?? (better is 11.Qe4 Nb4 12.Qb7 Nc2 13.Kf1 Na1 14.Ba1+–) 11...0-0 12.Nc3 Nc3 13.Bc3 e4 14.Ng1 Ne5 15.Be5 Be5 16.Rd1 Kh8 17.g3 Qc7 18.Ne2 Rad8 19.Nf4 g5 20.Nh5 f5 21.g4 f4 22.h4 fe3 23.de3 Rd1 24.Kd1 gh4 25.Kc1 Qc8 26.Rh4 a6 (better is 26...Qd8 27.Rh1 Qd7=) 27.ba6+/– Ba6 28.Qe4 Bc3?? (better is 28...Qe8 29.Nf6 Bb2 30.Kb2 Qe4 31.Ne4 Bc4+–) 29.Nf6!! Kg7 (29...Bf6 30.Rh7#; 29...Rf6 30.Qh7#) 30.Rh7 Kf6 31.Rh6 1–0. combijack (1860) – romast (1785), gameknot.com, 2013.

4.b5 d6 5.f3 Be6 6.d3 b6 (6...Be7 7.Nc3-/+) 7.a4 (7.Nc3 d5=+) 7...Be7 8.e4 a6 9.g4 (better 9.Ba3!?-/+) 9...ab5-+ 10.cb5 Bd7 (10...d5 11.a5 Ng4 12.fg4 Bh4 13.Kd2 de4 14.Kc2-+) 11.h4 (better 11.Nc3!?-/+) 11...Bb5!-+ 12.Nc3 (12.ab5 Ra5 Double attack (12...Ra1 Pinning; 12...Ra1 Deflection; 12...Ra5 Decoy)) 12...Bc6 13.Be3 (13.Nge2 Nfd7 14.g5 Na6-+) 13...Na6 (13...d5 14.Bd2-+) 14.g5 Nh5 15.f4? (15.Nge2-+) 15...ef4 16.Bf2 (16.Bd2 Ng3 17.Rh3 Nb4 18.Bf4 Nf1 19.Kf1 0-0-+) 16...g6 17.Qb3 (17.Be2 Ng3 18.Rh3 0-0-+ (18...Ne2?! 19.Nge2 h6 20.gh6-+)) 17...0-0 18.e5 (18.Be2 Nb4 19.Nh3-+) 18...Bh1 19.e6 Nc7 (19...d5!? 20.Bh3-+) 20.ef7 Rf7 21.0-0-0 (21.Be2 Ng3 22.0-0-0 Bc6-+) 21...Bc6 (21...d5 22.Bh3-+) 22.Qb6 Ba4 23.Rd2 Qd7 (23...Bd7 24.Bg2 Ra1 25.Kc2-+) 24.Qb7 (24.d4 c4! 25.d5 Nb5-+) 24...Bc6 25.Qb3 (25.Bh3 Bb7 26.Bd7 Bg5-+) 25...Ra1 26.Nb1 Nd5 (26...Bd5 27.Qb2 Qa4 28.Be2-+) 27.Qb8 (27.Bh3 Rf5!-+) 27...Rf8 28.Qb2 Ra4 (better 28...Qa7 29.Bh3 Ng7 30.Ne2-+) 29.Nc3 (29.Bh3 Rf5!-+) 29...Nc3 (better 29...Rb4 30.Bh3 Qb7 31.Be6 Kh8 32.Qa1 Nc3 33.Ba2 Bg5 34.hg5-+) 30.Qc3 (30.Bh3 Qa7 31.Be6 Rf7 32.Qc3 Ra1 33.Kb2 d5 34.Bf7 Kf7-+) 30...Rfa8 31.Qb3 Kf8 32.Nf3 Ra1 33.Kb2 Ba4 (33...Bd5! 34.Ne1 Bb3 35.Nc2 Bc2 36.Bc5 Qa4 37.Kc3 Qb3 38.Kd4 R1a4 39.Bb4 Rb4) 34.Qd5-+ Bc6 35.Qc4?? (35.Qb3 Bd5 36.Kc3 Bb3 37.Bd4 Qb5 38.Bg7 Kg7 39.d4 Rc1 40.Kb2 Qa5 41.Rc2 Qa2 42.Kc1 Qc2) 35...Qb7 36.Qb3 (36.Kc2 Qb1 37.Kc3 R1a3 38.Qb3 Qb3) 36...Qb3 (36...Rb1 37.Kb1 Qb3 38.Rb2 Qd1) 37.Kb3 Rb8 38.Kc2 (38.Kc3 Ra3 39.Kc2 Ba4 40.Kc1 Ra1) 38...Rf1 (38...Ba4 39.Kc3 Rc1 40.Rc2 Rc2) 39.Rd1 Ba4 40.Kd2 (40.Kc3 Rd1 41.d4 Rb3 42.Kc4 Rf3 43.Be3 fe3 44.dc5 dc5 45.Kc3 Rf2 46.Kc4 Rc2) 40...Bd1 (40...Rb2 41.Kc1 Rc2 42.Kb1 Rd1) 41.Ne1 (41.Be1 Bf3 42.d4 Ra8 43.Kc2 Re1 44.Kd2 Rd1 45.Kc3 cd4 46.Kc4 Be4 47.Kb5 Rb1 48.Kc4 Ra4) 41...Rf2 42.Kd1 (42.Kc1 Bb3 43.Nf3 Rf3 44.Kd2 Rf2 45.Ke1 Ra2 46.Kf1 Bd5 47.d4 Rb1) 42…Rb1 0-1. Paul593 - deep.thought, ChessWorld.net, 2009.

5.a4 a6 6.Bb2 Bd6 7.d3 0-0 8.e4 Be7 9.f3 (9.Nc3 Bb7=) 9...d6 10.g4 (10.Nc3 ab5 11.ab5 Ra1 12.Qa1 Bb7=) 10...g6 11.h4 a5 (11...ab5 12.ab5 Ra1 13.Ba1-/+) 12.g5 (12.Nc3!?=+) 12...Nh5-/+ 13.Ne2? (better 13.Bh3!?-/+) 13...f6-+ 14.Rg1? (better 14.Nec3-+) 14...fg5 15.hg5 Bg5 16.Nd2 (16.Nbc3-+) 16...Bd2 (better 16...Bh4 17.Ng3 Bg3 18.Rg3 Ng3-+) 17.Qd2 Rf3 18.Kd1 Bg4! 19.Rg4 Qc8?? (19...Rf1 20.Kc2 Ra1 21.Ba1-+) 20.Rg5?? (better 20.Rg1+-) 20...Rf1-+ 21.Kc2 Ra1 22.Ba1 Nd7 23.Nc3 Ndf6 24.Nd5 (24.Nd1 Qh3 25.Ne3 Kf7-+) 24...Nd5 25.ed5 Qd8 (better 25...Qh3 26.Qg2 Qg2 27.Rg2 Nf4-+) 26.Qf2?? (26.Rg1-+) 26...Qg5 27.Bc3 Rf8 28.Qd2 Rf2! 29.Qf2 Nf4 30.Bd2 (30.Qd2-+) 30...Nh3 (better 30...h5 31.Be1 Qg4-+) 31.Qf1?? (31.Bg5!? Nf2 32.Bd8+=) 31...Nf4 32.Kc3?? (32.Qf2 h5 33.Be1-+) 32...Qf5 (better 32...h5 33.Be3 h4-+) 33.Qh1 (33.Qf3 h5 34.Be1 g5-+) 33...Ne2 (better 33...Qd3 34.Kb2 Qd2 35.Kb1 Nd3 36.Qh7 Kh7 37.Ka1 Qb2) 34.Kc2 Nd4 35.Kc3 Ne2 (better 35...Qg4!? 36.Bh6-+) 36.Kc2 Nd4 37.Kc3 Nf3 (37...Qg4 38.Be3-+) 38.Be3 (38.Bh6-+) 38...Nd4 (38...h5 39.Qf1-+) 39.Bd4?? (39.Bd2 Qg4 40.Qf1-+) 39...ed4-+ 40.Kd2 Qf4 (40...Qf2!? 41.Kd1 Qe3 42.Qh4 Qd3 43.Ke1 Qe3 44.Kd1 Qf3 45.Ke1-+) 41.Kc2 Qf2 42.Kb3 (42.Kd1 Qe3 43.Qh4 Qd3 44.Ke1 Qc3 45.Kd1 Qb3 46.Kd2 Qb4 47.Ke2 Qc4 48.Kf2 Qc2 49.Kf1 d3 50.Qd8 Kf7 51.Qc7 Kf6 52.Qd6 Kf5 53.Qe6 Kf4 54.Qf7 Ke5 55.Qe6 Kd4 56.Qf6 Kd5 57.Qd8 Kc4 58.Qb6 d2 59.Qe6 Kb4 60.Qd7 d1Q 61.Qd1 Qd1 62.Kf2 Qd4 63.Kg2 c4 64.Kg3 c3 65.Kh2 c2 66.Kg2 c1Q 67.b6 Qdf4 68.b7 Qcf1) 42...Qe3 43.Kc2 (43.Qd1 Kg7 44.Kb2 h5-+) 43...Qe2 44.Kb3 (44.Kc1 Qd3 45.Qh4 Qc4 46.Kd2 Qa2 47.Ke1 Qb1 48.Kd2 Qb2 49.Kd1 Qb3 50.Kd2 Qe3 51.Kd1-+) 44...Qd3 45.Ka2 Qc4 46.Ka3 Qb4 47.Ka2 Qa4 48.Kb2 Qb5 49.Kc2 d3 50.Kd2 c4 51.Qh3 Qb2 52.Ke3 Qc1 (better 52...Qe2 53.Kd4 d2 54.Qe6 Qe6 55.de6-+) 53.Kd4 Qb2 54.Ke4?? (54.Ke3 Qe2 55.Kd4 d2 56.Qc8 Kg7 57.Qd7 Kh6 58.Qh3 Kg5 59.Qg3 Kf5 60.Qh3 Kf6 61.Qe6 Qe6 62.de6 b5 63.Kd5 c3 64.e7 Ke7 65.Kc6 d1Q 66.Kb5 c2 67.Kb6 c1Q 68.Ka6 Qc7 69.Kb5 a4 70.Kb4 Qb3) 54...Qb1 (54...Qe5 55.Kf3 Qe2 56.Kg3 Qe3 57.Kg2 Qh3 58.Kh3 d2 59.Kh2 c3 60.Kg2 d1Q 61.Kg3 c2 62.Kf4 c1Q 63.Ke4 Qc3 64.Kf4 Qe5) 55.Qe6= Kg7 56.Qd6?? (better 56.Qe7 Kh6 57.Qh4 Kg7 58.Qe7 Kh6 59.Qh4 Kg7 60.Qe7=) 56...Qe1 (56...d2 57.Kf4 Qf1 58.Kg3 d1Q 59.Qe7 Qf7 60.Qe5 Qf6 61.Qc7 Kh6 62.Qf4 Qf4 63.Kf4 Qd4 64.Kf3 c3 65.Kg2 c2 66.Kf3 c1Q 67.d6 Qf1 68.Kg3 Qdf4) 57.Kd4 d2 (better 57...Qf2 58.Kc4 d2-+) 58.Qd7?? (58.Qc7 Kh6 59.Qf4 g5 60.Qh2 Kg6 61.Qd6 Kh5 62.Qh2 Qh4 63.Qh4 gh4 64.d6 d1Q 65.Ke5 h3 66.Ke6 h2 67.Ke7 h1Q 68.d7 Qh4 69.Ke6 Kg6 70.Ke5 Qdd4 71.Ke6 Qhe4) 58...Kh6-+ 59.Qh3 Kg5 60.d6 d1Q 61.Kc4 Qb4 0-1. Paul593 – misterh, ChessWorld.net, 2010.

5.Nc3 Bb7=.

5.d3 a6=+ 6.a4 (6.Nc3!?=+) 6...ab5-/+ 7.cb5 Bd6 (7...d5 8.g3-/+) 8.Ba3 (8.Nf3 0-0=+) 8...Qc7 (8...Bc7 9.g3-/+) 9.Nd2 0-0 10.Nc4 Nd5 (10...Be7 11.Nf3=+) 11.Qc1 (11.Nf3 Be7 12.e4 Nb4=) 11...Ra4 (11...Be7 12.e4 Nb4 13.Nf3 Ra4 14.Qd1-/+) 12.e4 Nf6 13.Be2 Be7 14.Nf3 d6 15.0-0 Bd7 16.h3? (16.Qb2 Ra8=+) 16...d5 (better 16...Bb5 17.Qb1 Qc6-+) 17.Nfe5?? (better 17.ed5 Nd5 18.Nfe5 Bb5 19.Qb2=+) 17...dc4-+ 18.dc4 (18.f4 cd3 19.Bd3-+) 18...Qe5 19.Bd3 (19.Bb2 Ra1 20.Be5 Rc1 21.Rc1 Be6-+) 19...Bd6 20.f4 (20.g3 Bh3 21.Re1 Qh5-+) 20...Qd4 21.Rf2 (21.Kh2 Qd3 22.Rd1 Qe4 23.Rd6 Rc4-+) 21...Nh5 (better 21...Qd3 22.e5 Ne4 23.Rc2-+) 22.Qd1 (22.Bc2 Nf4 23.Qb2 Qb2 24.Bb2 Rc4-+) 22...Ra3! 23.Ra3 Bf4 (better 23...Nf4 24.Qd2-+) 24.Qh5 Be3 25.Be2 (25.Qe2-+) 25...Bf2 26.Kf1 Be6 (26...Qb2 27.Rd3 Bd4 28.Qg5-+) 27.Qf3 (27.Rd3 Qb2 28.Kf2 Bc4 29.Rd1-+) 27...Bh4 28.g3 (28.Qe3-+) 28...Bh3 29.Ke1 Qg1 (29...Bg5 30.Bd3 Qg1 31.Bf1 Re8 32.Rc3 Bf1 33.Re3 Bc4 34.Kd2 Rd8 35.Kc2 Be3 36.Qe3 Qe3 37.Kb2 Rd1 38.g4 Qb3) 30.Kd2 Rd8 (better 30...Bg5 31.Qf4 Rd8 32.Rd3 Rd3 33.Bd3 Bf4 34.gf4 Qf2 35.Kc3-+) 31.Rd3 Rd3 (better 31...Bg5 32.Qf4 Rd3 33.Bd3 Bf4 34.gf4 Qf2 35.Kc3-+) 32.Kd3 Qg3 (32...Bg5 33.Qf4 Bf4 34.gf4 Qc1 35.Bd1 Qd1 36.Ke3 Bf1 37.f5 Qe2 38.Kf4 Qf2 39.Ke5 Qh2 40.Kd5 f6 41.e5 Qe5) 33.Kd2 Qf3 34.Bf3 f6 (34...Nd7 35.Bd1 g5 36.Bf3-+) 35.Ke2 Be6 36.Kd3 Nd7 37.Ke3 Bc4 38.Kf4 Bb5 (38...Ne5 39.Ke3 Nf3 40.Kf3 Bb5 41.Ke3 Bg5 42.Kf2 c4 43.Ke1 c3 44.Kd1 Ba4 45.Ke2 c2 46.Kf1 c1Q 47.Kf2 Qf4 48.Kg2 Bb5 49.e5 Bc6 50.Kg1 Bh4 51.ef6 Qf2) 39.Kg4 Ne5 40.Kh4 Nf3 41.Kg4 Nd2 42.Kf5 Ne4! 43.Ke4 h5 44.Kf4 (44.Kd5 c4 45.Kd4 h4 46.Kc3 h3 47.Kb4 h2 48.Kb5 c3 49.Kb6 c2 50.Kb5 c1Q 51.Ka6 h1Q 52.Ka7 Qcc6 53.Kb8 Qb7) 44...c4 45.Ke3 (45.Ke4 c3 46.Ke3 h4 47.Kf4 c2 48.Kg4 c1Q 49.Kf3 Qg1 50.Ke4 Be2 51.Kf4 Qc5 52.Ke4 Qe5) 45...h4 (45...c3 46.Kd4 c2 47.Ke3 c1Q 48.Kf2 Qf4 49.Kg2 Bc6 50.Kh3 Qe5 51.Kh4 Qh2) 46.Kf3 (46.Kd4 h3 47.Ke4 h2 48.Ke3 c3 49.Kf3 h1Q 50.Ke3 Qf1 51.Ke4 c2 52.Ke3 g5 53.Kd2 c1Q) 46...c3 47.Ke3 (47.Kg4 c2 48.Kh4 c1Q 49.Kg3 Qe3 50.Kg2 Bc6 51.Kh2 Qf2 52.Kh3 Bd7) 47...h3 48.Kf2 (48.Kd4 c2 49.Ke4 c1Q 50.Kf3 Qg5 51.Kf2 Qf4 52.Kg1 Qd2 53.Kh1 Qg2) 48...c2 49.Ke1 (49.Kg3 c1Q 50.Kf3 h2 51.Ke4 h1Q 52.Kf5 Bc4 53.Kg4 Qg5) 49...c1Q 50.Kf2 h2 (50...Qc3 51.Kg1 Qd2 52.Kh1 Qg2) 51.Kg2 (51.Kf3 h1Q 52.Kg3 Bc6 53.Kg4 Qg5) 51...h1Q (51...Qf4 52.Kh1 Bc6) 52.Kf2 (52.Kg3 Bc6 53.Kg4 Qg5) 52…Qf4 0-1. Paul593 – tiggermuffin, ChessWorld.net, 2011.

4.Bb2 Ng4 5.h3+/- Nf2? (better 5...Nf6 6.Be5 d5 7.cd5 cd5+/-) 6.Kf2+- Qf6 (6...a5 7.Be5 Qh4 8.g3 Qc4 9.e3+-) 7.Nf3 Bd6 (7...d6 8.Nc3+-) 8.Kg1 (8.Nc3 Qg6 9.Qb1 Bc7+-) 8...c5 (8...0-0 9.Nc3 Be7 10.Ne4+-) 9.b5 (9.Nc3 Nc6 10.Nd5 Qd8+-) 9...b6 10.a4 Qg6 11.g4 (better 11.Ne5 Be5 12.Be5 d6+-) 11...Rg8 (11...h5 12.Nh4 Qf6+-) 12.Bg2 (worse 12.Ne5 Be5 13.Be5 Bb7+-) 12...e4 13.Ne1 (13.Nc3 Bb7 14.Nh4 Qe6+-) 13...Bg3 (13...Bb7 14.Nc3 Kd8 15.d3+-) 14.Nc2 (better 14.Ra3 Bf4 15.Nd3+-) 14...Qf6 (14...f5 15.Ra3 f4+-) 15.Bf6 gf6 16.Be4 Nc6 17.bc6 f5 18.Bf3 (18.cd7 Bd7 19.Ba8 fg4 20.hg4 Be5+-) 18...a5 19.d4 (better 19.cd7 Bd7 20.Ba8 h5+-) 19...d6 20.d5 (better 20.Kg2!? Bf4 21.e3 Bg5+-) 20...h5 21.gh5 Bf4 22.Kf1 Be5 23.Ra2 f4 24.Ra3 Bf5 25.e4 Bc8 26.h6 (26.Nc3 Rg3+-) 26...Ba6 27.Nd2 Rh8 28.Rg1 (better 28.Bh5 Rh6 29.Qg4 Kf8+-) 28...Ke7 29.Rg7! Rh6 (29...Bg7 30.hg7 Double attack (30.hg7 Passed pawn)) 30.Rg5 Rh3 31.Bg4 (better 31.Qb1 f6 32.Rg7 Kf8 33.Rd7+-) 31...Rh1 32.Ke2 Rd1 33.Kd1 Bf6 34.Rf5 Rh8 (34...Rg8 35.Bh5 Rg7 36.Rb3+-) 35.Rf4 Bg5 36.Rf5 Rh1 37.Ne1 Rh2 38.Nef3 (better 38.Rg5 Rh8+-) 38...Rh1 39.Kc2 f6 40.Ng5 fg5 41.Rg5 (41.Raf3 Bc8 42.Rf7 Ke8 43.Rf8 Ke7 44.R3f7) 41...Rh2 42.Rf3 Rh7 43.Rg8 Rh4 (43...Rf7 44.Rf7 Kf7 45.Ra8 Bc8 46.Rc8 Ke7 47.Ra8 Kf6 48.c7 Kg7 49.c8Q Kf6 50.Qf5 Kg7 51.Bh5 b5 52.Qg6) 44.Be6 (44.Bd7 Rf4 45.Rf4 Bc4 46.Re8) 44...Rh7 45.Ra8 (45.Bd7 Rh8 46.Rh8 Bc4 47.Re8) 45...Bc4 (45...b5 46.Rff8 Bc8 47.Rac8 ba4 48.Rce8) 46.Ra7 (46.Rff8 Bd3 47.Kc3 Be4 48.Rae8) 46...Ke8 47.Rh7 b5 (47...Bd3 48.Kc3 Ba6 49.Rff7 Kd8 50.Rf8) 48.Rh8 Ke7 49.Rf7 1-0. Paul593 – lennylauer, ChessWorld.net, 2017.

4.Nc3 d5 5.e3 d4 6.Nce2 d3 7.Ng3 Be6 8.Qb3 b5 (better is 8...e4!?-/+) 9.Bd3+= bc4 (9...e4 10.Be4 Ne4 11.Ne4 Bc4 12.Qc3+=) 10.Bc4+/– Bc4 11.Qc4 Bd6 12.N1e2 0-0 13.d4 (13.0-0 a5 14.Bb2 Re8+/–) 13...ed4 (13...a5 14.ba5 ed4 15.Nd4 Qa5 16.Bd2+=) 14.Nd4 Be5 (14...a5 15.ba5 Qa5 16.Bd2+=) 15.Bb2+/– Bg3 (15...Re8 16.0-0+/–) 16.hg3+– Qd5 17.Qc2 (better is 17.Qd5!? Nd5 18.Nf5+–) 17...Qg2+/– 18.Ke2?? (18.0-0-0 Nbd7+/–) 18...Qe4?? (better is 18...Ne4!? 19.Rh4 Qf2 20.Kd3 Qc2 21.Kc2 Re8+= (21...Ng3? 22.Rg1+–)) 19.Qc3 (19.Qe4 Ne4 20.Rh4 Re8+–) 19...Nd5 (19...Qg4 20.Nf3 Nd5 21.Qd4 Qd4 22.Bd4+/–) 20.Qd2 (20.Qd3 Qd3 21.Kd3 Rd8+/–) 20...Qg4 21.f3 Qg3?? (better is 21...Qg6+=) 22.Rag1+– Qd6 (22...Qg1 23.Rg1 g6+–) 23.Rg7!! 1–0. nikus1997b – blaugrana18, internet, 2012. (=1.a3 e5 2.b4 Nf6 3.c4 c6)

4.c5 b6 5.d4 e4 (5...ed4 6.cb6 Qb6 7.Nd2=+) 6.Bg5 Be7 (6...h6 7.Bf6 Qf6 8.Nc3=) 7.Nc3 d5 8.cd6 Qd6 (worse 8...Bd6 9.Ne4 Be7 10.Bf6 Bf6 11.Nf6 Qf6 12.e3+/-) 9.e3 Bf5 10.Bf4 (10.Nge2 0-0+=) 10...Qd7 (10...Qe6 11.Nge2=) 11.Bc4 (11.Nge2 0-0=) 11...Nd5 12.Bd5 cd5 13.Nge2 0-0 14.0-0 Nc6 15.Ng3 Bg6 (15...Bg4 16.Qb3 Rfd8 17.Rac1=+) 16.Qe2 f5 17.f3 Bf7 18.fe4 (18.b5 Na5=) 18...de4 (18...fe4 19.Rac1=+) 19.Rad1 (19.Qb5 g6+=) 19...Qc8 (better 19...Bb3!? 20.Rb1 Qe6=) 20.d5+/- Nd8 21.Nb5 White prepares the advance d6 (better 21.Be5 g6 22.Qf2+/-) 21...a5? (better 21...Qd7!?+=) 22.d6 (22.Rc1 Qa6 23.Nf5 Bf6+-) 22...Bh4 23.d7 (better 23.Nc7!? Bg3 24.Bg3+- (worse 24.hg3 Ra7+/-)) 23...Qc4+= 24.Nf5?? (better 24.Rc1 Qe2 25.Ne2+=) 24...Qe2-+ 25.Ne7 (25.Nh4 Qb5 26.Bd6 ab4 27.Bb4-+) 25...Be7 26.Nc7 Ra7 27.Nd5 Bd5 28.Rd5 Ne6 (28...Rc7 29.Rc5 Bc5 30.h3 Rf4 31.Rb1 Be3 32.Kh1 Rc2 33.Rg1 Bg1 34.Kg1 Qg2) 29.Re5 Nf4 (29...Rd7 30.h4 Rd2 31.Rg5 Bg5 32.Rf2 Qf2 33.Kh2 Qg2) 30.ef4 Bf6 (30...Rd7 31.h3 Rd2 32.Rg5 Bg5 33.Rf2 Qf2 34.Kh2 Qg2) 31.Re6 Bd4 32.Rf2 (32.Kh1 Qf1) 32...Qf2 (32...Qd1) 33.Kh1 Qg1 (33...Qe1) 0-1. Kabatana_Michael (1720) - Cchibuzorrr (1745), lichess.org, 2018.

5.Nc3 Be7 6.h3 (6.e4 c5+=) 6...0-0 7.e4 a6 (7...a5 8.Nf3+=) 8.Be2 (8.Nf3 a5=) 8...b5 (8...d5 9.cd5 cd5 10.d4 ed4 11.Nd5 Nd5 12.ed5 Qd5 13.Nf3+=) 9.cb5 (9.d4 bc4 10.Bc4 a5=) 9...ab5 10.Nf3 Bb7 (10...Nh5 11.0-0=) 11.0-0 Nbd7 (11...Re8 12.d4=) 12.d4 Rc8 (12...ed4 13.Qd4 Qb6 14.Rfd1=) 13.de5 (13.Qc2 ed4 14.Nd4 Ra8+=) 13...de5 14.Qc2 (14.Qb3 Qb6+=) 14...c5= 15.bc5 Nc5 e4 draws heavy fire (15...Rc5 16.Nd2 Qb6 17.Qd3=) 16.Rfd1 (better is 16.Rad1 Qb6 A) 17.Bb5? Nce4 (17...Be4?! 18.Qe2=) 18.Be2 Bc5-+; B) 17.Ne5 Nce4 18.Qb3=) 16...Qe8?? (16...Qb6 17.Ne5 A) 17...Be4?! 18.Bd3+=; B) 17...Nfe4?! 18.Bg4+= (18.Nb5? Ne6 19.Bc4 Qb5-+); C) 17...Nce4-+) 17.Bb5+/– Bc6 18.Bc6 Rc6 (18...Qc6 19.Nd5 Qe6 20.Ng5+–) 19.Ne5+– Rc8 (better is 19...Re6 20.Nd5 Nce4+–) 20.Rac1?? (better is 20.Nc4+–) 20...Nce4+= 21.Nf3 (21.Qe2!? Nc3 22.Rc3 Rc3 23.Bc3 Ba3 24.Qf3+=) 21...Nc3= 22.Bc3 Ba3 23.Ra1?? Bb4!-+ 24.Rd3 Ne4 25.Re3? Bc3 26.Ra4 Be5 27.Qe4= f5?? 28.Qb4 Rb8?? 29.Qc4+– Kh8 30.Re5 Qd8 31.Qf4 g6 32.Nd4 Qd7 33.Ne6 Rfe8 34.Nc5 Qd6 35.Re8 (35.Re8 Re8 36.Qd6 Re1 37.Kh2 Kg7 38.Ra7 Kh6 39.Qf4 g5 40.Qd6 Re6 41.Qe6 Kh5 42.Rh7#) 1–0. cruciverbalist (2155) – jlambe (1995), net–chess.com, 2008.

5.d4 ed4 6.Qd4 Be7 7.Nf3 0-0 8.Nc3 h6 9.Ne4 Bf5 10.Nf6 Bf6 11.Qd2 Bb2 12.Qb2 Qe7 13.e3 Nd7 14.Qb3 Nf6 15.Bd3 Bd3 16.Qd3 Ne4 17.0-0 Rad8 18.Nd2 d5 19.Ne4 de4 20.Qc2 Rd3 21.Rfd1 Rfd8 22.Rd3 ed3 23.Qc3 Qd6 24.g3 d2 25.Rd1 f6 26.Kf1 Kf7 27.Ke2 Ke6 28.Rd2 Qd2 29.Qd2 Rd2 30.Kd2 Ke5 31.Kd3 f5 32.f4 Ke6 33.Kd4 g5 34.e4 b6 35.e5 g4 36.a4 a6 37.a5 b5 38.cb5 cb5 39.Kc5 h5 40.Kb6 Kd5 41.Ka6 Normal 1-0. manchego86 (1815) - junker (1805), Rated Classical game, lichess.org, 2015.

5.Qc2 g6 (5...dc5 6.Nf3 Nbd7 7.Nc3-+) 6.e3 Bf5 7.d3 d5 (7...dc5 8.Nf3 Nbd7 9.Nbd2-/+) 8.f3 (8.Nf3!? Nbd7 9.Nbd2=) 8...Be7 9.g4 Bd7 (9...Be6 10.Bb2 d4 11.ed4-/+) 10.h4 (10.Bb2 d4 11.ed4 ed4-/+) 10...b6 (10...0-0 11.h5 a5-+) 11.a4? (better 11.Bb2 d4 12.ed4 ed4 13.g5=+ (worse 13.Bd4 Bg4 14.Qf2 Bf5-/+)) 11...bc5 12.bc5 Qa5 (12...Na6!? 13.Bb2 Nb4 14.Qd2-+) 13.Bd2 Qc5 14.Qd1? (better 14.Qc5 Bc5 15.Na3-/+) 14...Na6-+ 15.Nc3 d4 16.Ne4 Ne4 17.fe4 (17.ed4 ed4 18.de4 Nb4-+) 17...Nb4 (better 17...de3 18.Rb1 ed2 19.Qd2-+) 18.a5 (18.Rc1 Qd6 19.g5-+) 18...de3 19.Bc1 (19.Rc1 ed2 20.Qd2 Qa5-+) 19...Qc3 20.Ke2 Qa1 (better 20...Bg4 21.Nf3 Qa1-+) 21.Be3 Bg4 22.Nf3 Bf3 23.Kf3 Qa5 (better 23...Qd1 24.Kg3 Nd3-+) 24.h5 g5 (24...Bc5 25.hg6 fg6 26.Bh6-+) 25.Kg4 h6 26.Qb3 Rb8 27.Qd1 (27.Qc4 0-0 28.Kg3 Rfd8-+) 27...Qc7 28.d4 (28.Kf3 0-0 29.Kg2 Rfd8-+) 28...Qd7 29.Kg3 Kf8 (better 29...Qd6 30.Kg2 Bf6 31.d5 cd5 32.Bc4-+) 30.Bc4 Rh7 (better 30...Bf6 31.Rf1 Qd6 32.Kg2-+) 31.Qf3 (31.de5 Qc7 32.Kg4 Rd8-+) 31...Nc2 (better 31...ed4 32.Bd2-+) 32.Rf1 (32.de5 Rb4 33.Rd1 Qc7-+) 32...f6 (better 32...Ne3!? 33.Qe3 ed4 34.Qe2-+) 33.de5 (33.d5 cd5 34.Bd5 Kg7-+) 33...Ke8 (better 33...Rb4 34.Ba2 Qc7-+) 34.ef6 (34.Rd1 Qc7 35.Qf5 Qe5 36.Qe5 fe5 37.Ba7-+) 34...Bd6 35.Kf2 Ne3 36.Qe3 Rb2 37.Be2 Rc2 (37...Qg4 38.Re1 Qh4 39.Kf1 Bg3-+) 38.e5 (38.Qd3 Qg4 39.Qf3 Bc5 40.Ke1 Rb7 41.f7 Kf8 42.Kd1 Ra2 43.Bb5 Rb5 44.Kc1 Qf4 45.Qf4 Ba3 46.Kd1 gf4 47.Rf4 Rb1) 38...Bc5 39.f7 Rf7 40.Ke1 (40.Kg3 Be3 41.e6 Qd6 42.Kg4 Rf1 43.Kh3 Rg1 44.e7 Qg3) 40...Rf1 (40...Bb4 41.Qc3 Bc3) 41.Bf1 (41.Kf1 Be3 42.e6 Qd5 43.Bf3 Qf3 44.Ke1 Qe2) 41...Be3 (41...Bb4 42.Qc3 Bc3) 42.Be2 (42.Ba6 Qg4 43.Bc4 Rc1) 42...Rc1 43.Bd1 Qd2 (43...Qd1) 44.Kf1 Rd1 0-1. Paul593 - Bandy 1, ChessWorld.net, 2009.

5.d4 dc5-+ 6.e4? (better 6.dc5 Qd1 7.Kd1-+) 6...cd4 (worse 6...Ne4 7.Nf3 cd4 8.Ne5-+) 7.Bd3 (7.Nf3 Nbd7-+ (7...Ne4?! 8.Ne5 Qd5 9.Bf4-+)) 7...a5 8.Bd2 (8.Nf3 Bd6 9.Nbd2 ab4 10.Nc4-+) 8...ab4 9.a4 (9.Nf3 Bd6-+) 9...b5! 10.a5 (10.ab5 Ra1 Pinning (10...Ra1 Deflection)) 10...Ra5 11.Na3 (11.Ra5 Qa5 12.f4-+) 11...Ra3 12.Ne2 (12.Ra3 ba3 13.Nf3-+) 12...Rd3 13.Ra8 Qb6 14.Qb1 Rd2! 15.Kd2 Bd6 16.Kd3 Be6 17.Rc1 b3 (17...Bc4 18.Rc4 bc4 19.Kc4 Qb5 20.Kb3 Qe2 21.Qc2-+) 18.Rd1 c5 (18...Bc4!? 19.Kd2 d3 20.Nc3-+) 19.Kd2 Qb7 20.Qa1 Ne4 (better 20...Qe4 21.f3 Qe3 22.Ke1 d3 23.Rd3 Qd3-+) 21.Kd3 Nf2 (21...c4) 22.Kd2-+ e4 (22...Qg2 23.Rg1 Ne4 24.Kd1 Qf3 25.Qc1 Nf2 26.Ke1 Nd3 27.Kd1 Nc1 28.Rg2 b2 29.Ra3 b1Q 30.Rf3 Nd3 31.Kd2 Qa2 32.Kd3 c4 33.Ke4 Qa8) 23.Rb1 e3 24.Ke1 (24.Kc1 Nd3 25.Kd1 Qg2 26.Rb8 Bb8 27.Qc3 dc3 28.Rb3 Bb3) 24...b2 (24...Qg2 25.Rb8 Bb8 26.Qa5 Nd3 27.Kd1 Qf1 28.Qe1 Qe1) 25.Rb2 Nd3 (25...Qg2 26.Rb8 Bb8 27.Qa8 Nd3 28.Kd1 Qf1 29.Kc2 Qe2 30.Kb1 Qb2) 26.Kf1-+ Nb2 27.Ra7 Qb6 (better 27...Qd5 28.Kg1 d3 29.Qf1-+) 28.g3 Nc4 (28...Bh3 29.Kg1 d3-+) 29.Nc1 Nd2 (29...Qc6 30.Re7 Be7 31.Qa8 Bh3 32.Ke2 Qa8 33.Kd1 Qg2 34.Ne2 d3 35.Kc1 Qf1) 30.Kg2 (30.Kg1 Qc6 31.Re7 Be7 32.Qa7 Bh3 33.Qb8 Bd8 34.Qe5 Kd7 35.Qf5 Bf5 36.Nd3 Nf3 37.Kg2 Ne1 38.Kf1 Qh1 39.Ke2 Bg4) 30...0-0 (30...Qc6 31.Kg1 Bh3 32.Re7 Be7 33.Qa8 Qa8 34.Nd3 Qg2) 31.Ne2 (31.Kg1 Qc6 32.Nd3 Nf3 33.Kf1 Nh4 34.Ne1 Qh1 35.Ke2 Qh2 36.Ng2 Qg2 37.Ke1 Bg3 38.Kd1 Qd2) 31...Qc6 32.Kg1 Qf3 (32...Nf3 33.Kg2 Nh4 34.Kf1 Bc4 35.Ke1 Qh1 36.Ng1 Qg1) 33.Qe1 (33.Rf7 Bf7 34.Nf4 e2 35.h3 Qf1 36.Qf1 ef1Q 37.Kh2 Nf3) 33...Bd5 34.Nf4 (34.Qd2 Qf2) 34…Qh1 0-1. Paul593 - Larry Larry (1835), ChessWorld.net, 2013.

4.Bb2 Be7 5.e3 d6 6.Nf3 0-0 (6...e4 7.b5 Na5 8.Nd4=) 7.Nc3 Bg4 8.Be2 h6 (8...e4 9.Ng5 Ne5 10.f3 ef3 11.Nf3=) 9.d4 ed4 10.Nd4 Be2 11.Nde2 (11.Nce2 Qd7=) 11...Re8 12.0-0 Bf8 (12...Ne5 13.Qb3=) 13.Nd4 Ne5 14.Qc2 (better 14.Qe2+=) 14...Nc4-/+ 15.Ncb5 (15.Rfc1 Nb2 16.Qb2 d5-/+) 15…d5 0-1. alddhsfd (1695) - wazadio (1630), lichess.org, 2019.

4.b5 Nd4 5.d3 (better 5.Nc3=+) 5...e4 (5...Bc5 6.e3 Ne6 7.Nf3=+) 6.e3 (6.de4!? Ne6 7.Nc3+=) 6...Ne6=+ 7.d4 (7.Bb2 a6=) 7...c6 (7...a6 8.ba6 b6 9.Ne2-/+) 8.c5 (8.Nc3 d5=+) 8...Nc7 (8...b6 9.cb6 Qb6 10.Nc3-/+) 9.a4 (9.Qc2 Nb5 10.a4 Nc7-/+) 9...Nfd5 (9...d6!?-/+) 10.Bd2 cb5 (10...d6!? 11.Nc3 Nc3 12.Bc3 Nd5=+) 11.ab5= a6 (better 11...b6!? 12.Qc2 f5=) 12.b6 Ne6 13.Ra5 (13.Qb3 Nf6+/-) 13...f5 (13...d6 14.cd6 Qd6 15.Qb3+=) 14.g3 (better 14.Qb3 Nf6 15.Nc3+-) 14...g5? (better 14...d6 15.Qb3 dc5+=) 15.Qh5+- Ke7 16.Bc4 (16.Qh3 g4 17.Qh4 Nf6+-) 16...Nf6+/- Black intends g4 17.Qe2 (17.Qd1 Kf7+/-) 17...g4 (17...Kf7 18.Nh3 Kg6 19.0-0+=) 18.Bb4 (18.Nc3 Kf7 19.h3+-) 18...h5? (18...Kf7!?+=) 19.Qa2 (better 19.d5 Ng5 20.d6 Ke8 21.Qb2+-) 19...Bh6?? (better 19...Kf7+/-) 20.d5 (better 20.c6 Kf7 21.c7+-) 20...Nf8 (20...Ng5 21.c6 d6+-) 21.d6 Ke8 22.Bf7 1-0. Paul593 - black sorcerer, ChessWorld.net, 2010.

4.b5 Ne7 5.c5? (5.Bb2 Nf5=+) 5...c6 (5...Nf5!? 6.Nf3 e4 7.Qc2-+) 6.a4 (6.Nf3 e4 7.Nd4 a6 8.ba6 b6 9.cb6 Qb6-/+) 6...Ned5 7.d3? (better 7.Qc2-/+) 7...Bc5-+ 8.e4 Nc7 (better 8...Qb6!? 9.Nh3 Bd4 10.Ra3-+) 9.Nc3 0-0 10.f3? (better 10.Be3 Bd4 11.Bd2-+) 10...cb5 11.ab5 d6 (11...d5 12.Nge2-+) 12.Rb1 a6 13.b6 Ne6 (13...Nb5!? 14.Na4-+) 14.Na4 Bd7 15.Nc5 Nc5 16.g4 (16.Ne2-+) 16...Ba4 17.Qe2 Bb5 18.Qa2 (18.Qe3 Qb6 19.d4 Qa5 20.Qd2 Qd2 21.Bd2 Bf1 22.Kf1 ed4-+) 18...Qb6 (18...Nd3!? 19.Bd3 Bd3 20.Ne2 Bb1 21.Qb1-+) 19.Qa3 (19.Nh3 Ne6-+) 19...Qc7 (19...d5!? 20.Ne2-+) 20.Be3 Rfd8 21.Be2 Na4 22.Kf2 (22.Nh3 d5 23.Rc1 Qd7-+) 22...Qc3 (22...Rac8 23.g5 Nh5 24.Rc1-+) 23.Qa2 (23.Rb3 Qc6-+) 23...Rac8 24.Rc1 Qc1 (better 24...Qb2!? 25.Qb2 Nb2 26.Nh3-+) 25.Bc1 Rc1 26.g5 (26.h4 Rdc8 27.Qa3 Nc5-+) 26...Nh5 27.Qb3 (27.Qd2 Rdc8 28.Bd1 Rb1-+) 27...Rdc8 28.Bd1 (28.d4 Be2 29.Ne2 Rh1 30.Qb7 Nb6-+ (30...Rh2 31.Kg1 Rf8 32.Kh2 ed4 33.Nd4+/-)) 28...R8c3 (better 28...Nc5 29.Qb5 ab5-+) 29.Qd5 Rd3 30.Qb7 h6 31.Qc8?? (31.Be2 Rd2 32.Qa8 Kh7 33.gh6 Be2 34.Ne2 Rh1 35.Ke3-+) 31...Kh7 (better 31...Rc8 32.Be2 Rc2-+) 32.Qc1+- Nf4 (32...hg5 33.Ba4 (worse 33.Qg5 Rd1 34.Qh5 Kg8+-) 33...Ba4 34.Qc4 Rd2 35.Ke3+-) 33.Bc2 (better 33.Ne2!? Rc3 34.Qd2 Be2 35.Be2 Nh3 36.Kg3 Ng5+-) 33...Rc3 34.Ne2 (better 34.Qd2 Ra3 35.Ba4 Ra4 36.Qc2+-) 34...Ne2 (34...Be2!? 35.Qd2 Rf3 36.Ke1 Nb2-/+) 35.Qd2 Nf4?? (35...Nd4!? 36.Ba4 Rf3 37.Kg2 Ba4=) 36.h3 (36.Ba4 Rd3 37.g6 fg6+-) 36...Bd3?? (36...Rc4 37.gh6 gh6 38.h4+-) 37.Bd3 (better 37.Ba4 Ra3 38.Bd1+-) 37...Rd3+= 38.Qa5 (38.Qc2 Nc3+=) 38...Nc3 39.h4 (39.Rc1 Nb5 40.gh6 Ra3=) 39...Nd1 (better 39...Rd2!? 40.Kf1 Rd1 41.Kf2 Rh1 42.Qc3 Rh4=+) 40.Kg3 Ne2 41.Kh2 Ne3 (41...Nd4 42.Kg2=) 42.Qa6 (better 42.Qa2 Nf4 43.Rb1+/- (43.Qf7?? Rd2 44.Kg3 Rg2)) 42...Rd2= 43.Rb1 (better 43.Rg1=) 43...Nc3-+ 44.Kg3?? (better 44.Kh1 Nb1 45.Qa7-+) 44...Rg2 45.Kh3 Nb1 (better 45...Ne2 46.Qe2 Re2 47.Rh1-+) 46.Qd6 (46.Qd3 Nd2 47.Qe3 Rh2 48.Kh2 Nf1 49.Kg2 Ne3 50.Kf2 Nd1 51.Kg3-+) 46...Nd2 47.gh6 (47.Qd3 Rf2 48.Qe3 Rf3 49.Qf3 Nf3 50.gh6 Kh6-+) 47...Ndf1 (47...Nf3 48.Qd1 Rh2 49.Kg3 Nd1 50.hg7 Rf2 51.h5 Kg7 52.h6 Kh6 53.Kh3 Ng5 54.Kg3 Ne4 55.Kh4 Ne3 56.Kh3 Kg6 57.Kh4 Rh2) 48.h5 (48.Qe5 Kh6 49.Qf4 Kh7 50.Qf5 Nf5 51.Kg2 N5e3 52.Kf2-+) 48...Rg3 (48...Rh2) 49.Kh4 Ng2 0-1. Paul593 - ron123 (1640), ChessWorld.net, 2010.

4.Nc3 d5 5.Nd5 Nd5 6.cd5 Qd5 7.e3 Be7 8.Bb2 0-0 9.Nf3 (9.d4 ed4 10.b5 Bf6=) 9...e4+= 10.Nd4 Nd4 11.Bd4 Be6 12.Rc1 c6 13.Bc4 (13.d3!?=) 13...Qg5-/+ 14.0-0? (better is 14.Rg1!?-/+) 14...Bh3-+ 15.g3 Bf1 16.Qf1 Bf6 17.Qg2? (better is 17.Bf6 Qf6 18.d4-+) 17...Bd4 18.ed4 Qd2 19.Qf1 Rfd8 20.Rd1 Qc3 21.Ba2 Rd4 22.Rd4 Qd4 23.Bb3 (23.Qc1 Re8 24.Qf1 Qc3-+) 23...e3 24.fe3 (24.Qe2 Re8 25.Qf3-+) 24...Qe3 25.Kh1 Qb3 26.Qc1 (26.Kg2 Qa3 27.Qe1 a5 28.ba5 Qa5-+) 26...Qf3 27.Kg1 Rd8 0–1. vipernsx (2190) – pierred (2775), net–chess.com, 2016.

4.d3 Be7 5.Bd2 (5.Nf3 d6=) 5...d6 6.a4 (6.e3 e4=+) 6...0-0 7.b5 Nd4 8.Nc3 c6 (8...Re8 9.e3 Nf5 10.Nf3=) 9.g3 (9.e3 Ne6=) 9...cb5 (9...d5 10.e3 Ne6 11.Nf3-/+) 10.cb5 (10.ab5 d5=+) 10...a6 (10...Be6 11.Rb1-/+) 11.ba6 ba6 12.Bg2 Rb8 13.Nf3 Nf3 14.Bf3 Bb7 15.0-0 Bf3 16.ef3 d5 17.Ne2 e4 (17...Bc5 18.Bg5-/+) 18.de4 de4 19.Bf4 Bd6?? (better 19...Rb4=+) 20.Bd6+- (20.Qd6?! ef3 21.Nd4 Rc8+-) 20...ef3 21.Bf8 (better 21.Nf4!? Ne4 22.Bb8 Qd1 23.Rfd1 Rb8+-) 21...fe2? (better 21...Qd1!? 22.Rfd1 fe2+-) 22.Qe2 Qf8 23.Qa6 Ng4 24.Qe2 Nf6 25.a5 Qc8 (25...Ra8 26.Rfd1+-) 26.a6 Ra8 (26...Qc5 27.a7 Ra8 28.Rfb1+-) 27.Rfc1 (better 27.Qe7 Ng4 28.a7+-) 27...Qh3 (27...Qd8+-) 28.Qf3 Ng4 29.Qa8 1-0. AZCornhusker - ghalb20, Rated Blitz game, lichess.org, 2014. (=1.a3 A00: Irregular Openings 1...e5 2.b4 Nf6)

5.Bb2 Be6 (5...Bf5 6.Ne2=+) 6.d3 (6.Nc3 Be7=) 6...h6 7.f4? (better 7.Nf3=) 7...ef4-+ 8.e4? (better 8.ef4!? d5 9.Nf3-/+) 8...Be7 (better 8...Ng4 9.Nf3 Nce5-+) 9.d4?? (9.Nf3 Ng4 10.Bg7-+) 9...Bg4 (better 9...Ne4 10.Be2 Bh4 11.Kf1 Ne7-+) 10.Be2 Be2 (10...Bd7 11.Nc3 0-0 12.Nh3-/+) 11.Ne2-/+ Ne4 12.0-0 Bg5 (12...g5!?-/+) 13.Nf4=+ Bf4 (13...0-0!?=+) 14.Rf4= Ng5 15.Qe2 (better 15.h4!? Nh7 16.Qe1 Ne7 17.d5=) 15...Qe7=+ 16.Qf1 0-0 17.d5 Ne5 18.Nc3 Ng6 19.Rf2 Ne4 (better 19...Qd7-/+) 20.Re1+= f5 21.Rfe2 (better 21.Rf5!? Nd2 22.Re7 Nf1 23.Rf8 Rf8 24.Rc7+/-) 21...Qd7 (21...Ne5 22.Nb5-/+) 22.Nd1 (22.Ne4!? fe4 23.Rf2=+) 22...Rae8 23.Bd4 Ne5 24.Ra2 (24.Be5 Re5 25.Qf3 c6-/+) 24...Qa4-+ 25.Nb2 (better 25.Be5 Re5 26.Qd3-+) 25...Qd7 26.Re3?? (26.Nd1 Qe7 27.Nf2-+) 26...Ng4-+ 27.Rh3 (27.Re2 Qf7 28.Qf4 g5-+) 27...Nd2 (27...f4 28.Rd3-+) 28.Qd1 Ne4 29.Rh5?? (29.Qf1 f4 30.Nd1-+) 29...Qf7 30.Rh3 Nef6 (30...b5!? 31.cb5 Qd5 32.Ra1 Qb5 33.Na4-+) 31.Nd3 (better 31.Rf3-/+) 31...Ne4 (31...b5!? 32.Nf4-+) 32.Qc1 (32.Nb2 b5 33.cb5 Qd5 34.Ra1 Qb5 35.Qb3 Rf7 36.Nd3-+) 32...Qd7 33.Nf4 Qa4 (33...c5 34.Ba1-/+) 34.Nh5 (better 34.Ne6 Rf7 35.Rf3-/+) 34...Qd7?? (better 34...Rf7-/+) 35.Bg7 (35.Ng7!? Re7 36.Ne6 Re6 37.de6 Qe6 38.Re2+/- (worse 38.Ba7 b6-/+)) 35...Rf7+= 36.Nf6?? h6 seems the pivot of the position (better 36.Bh6 Qe7 37.Re2+=) 36...Nef6-+ (36...Rf6?! 37.Bf6 Nef6 38.Rf3-+) 37.Bh6 Nh6 38.Rh6 Kg7 (better 38...Ng4 39.Rh3 f4-+) 39.Qg5+- Kf8 40.Rh8 (40.Rf6?! Rf6 41.Qf6 Qf7 42.Qh8 Qg8+/-) 40...Ke7 41.Re2 Kd8 42.Rhe8 Qe8 43.Re8 Ke8 44.h4 (44.Qf5 Nd7 45.Qg4 Ke7+-) 44...Ne4 (44...Ng4 45.Qg8 Rf8 46.Qg6 Rf7 47.h5+-) 45.Qg6 Ke7 (45...Nf6 46.Qf5 Nd7 47.Qg5+-) 46.h5 Rf6 47.Qh7 (better 47.Qg8 Rf7 48.Qc8+-) 47...Kd8 (47...Rf7 48.Qg8 Nf6+-) 48.h6 Ng5 49.Qg8 Kd7 50.Qg5 Rf8 51.h7 (51.h7 Ke8 52.c5 Kf7 53.Qf5 Kg7 54.Qf8 Kf8 55.h8Q Ke7 56.Qg7 Ke8 57.Qc7 Kf8 58.cd6 Kg8 59.Qe7 a5 60.d7 ab4 61.d8Q; 51.Qg7 Ke8 52.h7 b6 53.c5 dc5 54.bc5 a5 55.c6 Rh8 56.Qh8 Ke7 57.Qe5 Kf7 58.h8Q Kg6 59.Qeg7) 1-0. Paul593 - ron123, ChessWorld.net, 2021.

5.b5 Ne7 6.a4 Bf5 7.a5 a6 8.Qb3 (8.Nc3 c5=+) 8...Ng6 (8...ab5 9.cb5 c6 10.Qa4-/+) 9.f3 (9.Nc3!?=+) 9...ab5-/+ 10.Qb5 Bd7 11.Qb7 Rb8 12.Qa7? (12.Qa6 Ne7 13.c5-+) 12...Ra8?? (better 12...Ne7 13.c5 Nc6-+) 13.Qb7-/+ Rb8 (13...Be7-/+) 14.Qa7-+ Be7 (14...Ne7 15.Na3 Nc6 16.Qa6-+) 15.e4 0-0 16.a6?? (better 16.Nc3-/+) 16...c5-+ 17.Ra2 (17.Nc3 Bc6 18.Nb5 Ne8-+) 17...Rb1 18.Kd1 (18.Ne2 Nf4 19.Kd1 Nd3-+) 18...Qc8 (18...Bc6 19.Ne2-+) 19.Bd3 (19.Ne2 Bc6 20.Nc3 Rb8-+) 19...Rb3 20.Bc2 Rb8 21.Rb2 Rb2 22.Bb2 Qa8 (22...Bc6 23.Qb6 Bd8 24.Qb3 Qa6 25.Ke2-+) 23.Qb7 Qb7 24.ab7 Rb8 25.Bc3 Rb7 26.g4 (26.Ke1 Ra7-+) 26...Nf4 27.Nh3 (27.h4-+) 27...Nh3 28.Ke2 Ra7 29.Rb1 Nf4 30.Kf2 h6 31.h4 (31.Ke3 h5 32.gh5 N6h5-+) 31...Nh7 32.h5 Bh4 33.Ke3 Ba4 (33...Bg5 34.Kf2-+) 34.Rb8 (34.Ra1 Bc2 35.Ra7 Bd3-+) 34...Nf8 35.Bb1 (35.Ba4 Ra4 36.d3 Ra3-+) 35...Bc6 (better 35...Bd1 36.d3-+) 36.Bc2 Rb7 37.Rc8 (37.Ra8 Bd7-+) 37...Bd7 38.Ra8 Bg5 39.d3 (39.Kf2 Be6 40.Ra4 Nd7-+) 39...Bc6 (better 39...Nd5! 40.Kf2 Nc3 41.Ra3-+) 40.Rc8 (40.Kf2-+) 40...Bd7 41.Ra8 Nd5 42.Kf2 Nc3 43.Bb3 Rb3 44.Rd8 Rb2 45.Kg3 (45.Kg1 Ne2 46.Kg2 Ng3 47.Kh3 Nf1 48.Rf8 Kf8 49.f4 Rh2) 45...Bd8 (45...Bf4 46.Kh4 Rh2) 46.f4 (46.d4 cd4 47.g5 d3 48.f4 d2 49.fe5 d1Q 50.e6 Be6 51.Kf4 Bg5 52.Kg3 Ne4) 46...Ne2 47.Kf3 (47.Kf2 Nf4 48.Kf1 Bh4 49.Kg1 Bg3 50.d4 Rb1) 47...Nf4 48.Kg3 (48.g5 N8e6 49.Kg3 Ng5 50.d4 Nh5 51.Kh4 Rh2) 48...Rg2 49.Kf3 N8e6 (49...Bg4 50.Ke3 Re2) 50.Ke3 (50.g5 Ng5 51.Ke3 Re2) 50...Re2 (50...Nd4 51.g5 Re2) 51.Kf3 Nd4 52.Kg3 Rg2 0-1. Paul593 - ron123 (1725), ChessWorld.net, 2009.

4.c5 Nc6 5.e3 Bg4 6.f3 Bf5 7.Nc3 d4 8.ed4 Nd4 9.Qa4 c6 10.Nge2 Nc2 11.Kf2 Na1 12.g4 Bc2 13.Qa5 b6 14.Qa6 Bd3 15.Qb7 Nd7 16.Bh3 e4 17.Ne4 Be2 18.Ke2 bc5 19.Nc5 Bc5 20.bc5 0-0 21.Qc6 Re8 22.Kf2 Ne5 23.Qb5 Qd4 24.Kg3 Rab8 25.Qf1 Qc5 26.d3 Qd6 27.f4 Ng6 28.Bb2 Nc2 29.Qf2 Rb2 30.Rc1 Qd3 31.Kg2 Ne3 32.Kg1 Rf2 Normal 0-1. Juliusceasar – ROTATOR, Rated Classical game, lichess.org, 2016. (=1.a3 e5 2.b4 Nf6)

4.e3 (--> 1.b4 e5 2.a3 d5 3.e3 Nf6 4.c4).

5.Bb2 e4 6.d4 Be7 7.Nc3-/+.

5.Bb2 Qe7 6.e3 Bb7 (6...bc5 7.Nf3 e4 8.Ne5-/+) 7.f3? (better 7.cb6!? ab6 8.Nf3=+) 7...bc5-/+ 8.b5 (8.Nh3!?-/+) 8...Nbd7-+ 9.d3 (9.Nh3 g6-+) 9...Rd8 (9...a6!? 10.Nh3-+) 10.Qa4 Ra8 11.Be2 (11.Nd2 g6 12.Qa5 Nb6-+) 11...Nb6 12.Qd1 c6 13.e4 (13.Nh3 cb5 14.0-0 Na4-+) 13...d4 (better 13...cb5!? 14.Nh3-+) 14.a4 Qd7?? (better 14...cb5 15.ab5 c4-+) 15.a5=+ Na4 (better 15...Nbd5 16.a6 Ne3 17.ab7 Qb7=+) 16.a6?? (better 16.Qa4 cb5 17.Qb3+/-) 16...Nb2-+ 17.Qb3 Nd3! 18.Bd3 (18.Qd3 Bc8 Combination; 18.Bd3 Bc8 Combination) 18...Bc8 19.b6 ab6 20.a7 (20.Qb6 Bd6 21.a7-+) 20...Qb7 (better 20...b5 21.Kf2-+) 21.Ba6 (21.Nd2 Ra7 22.Ra7 Qa7 23.Nh3-+) 21...Qa7 22.Ne2 (22.Bb5 Qa1 23.Bc6 Nd7 24.Ba8 c4-+) 22...Ba6 23.0-0 (23.Nd2 b5 24.f4 c4-+) 23...Qb7 (23...c4 24.Qb2-+) 24.Re1 c4 25.Qd1 Bb4 26.Rf1 0-0 27.g4 Qe7 (27...c3 28.Ra6 Qa6 29.Nc1-+) 28.Rf2 Bc5 (28...c3 29.Ng3 Be2 30.Qe2 Ra1 31.Qd3-+) 29.h4 d3 30.Nec3 Bd4 31.g5 Bf2 32.Kf2 Qc5 (better 32...Nh5 33.Qe1 f6-+) 33.Kg3 Nh5 34.Kg2 Nf4 (better 34...Bc8 35.Qg1 Qg1 36.Kg1 Ra1-+) 35.Kh2 Qf2 36.Kh1 Qg2 0-1. Paul593 – Reachman, ChessWorld.net, 2017.

5.cb6 ab6 6.Bb2 Bd6 7.d4 e4 8.g3 0-0 9.e3 Bg4 10.f3 ef3 11.Nf3 Ne4 12.Nbd2 Qf6 13.Bg2 Nd2 14.Kd2 Nd7 15.Rf1 Qg6 16.h3 Bf5 17.Nh4 Qg3 18.Nf5 Qg2 19.Kc1 Qh3 20.Nd6 cd6 21.Re1 Rfc8 22.Kb1 Nf6 23.Ka2 Ne4 24.Rc1 Qg2 25.Qb3 h5 26.Rc8 Rc8 27.Rc1 Rc1 28.a4 Rc2 29.Ka3 Rb2 30.Qb2 Qb2 31.Kb2 h4 32.a5 ba5 33.ba5 Nf6 34.a6 Nd7 35.Kb3 h3 36.Kb4 h2 37.a7 Nb6 38.Kb5 Na8 39.Ka6 h1Q 40.Kb7 Qb1 41.Ka8 g5 42.e4 de4 43.d5 Qa2 44.Kb7 Qd5 45.Kb8 e3 46.a8Q Qa8 47.Ka8 e2 48.Kb8 e1Q 49.Ka8 Qe7 50.Kb8 Kf8 51.Ka8 Ke8 52.Kb8 Qd7 53.Ka8 Qb5 54.Ka7 Kd7 55.Ka8 Kc7 56.Ka7 Qb7 Normal 0-1. lolo2015 - Republican (1875), Rated Classical game, lichess.org, 2015. (=1.a3 e5 2.b4 Nf6)

5.cb6 ab6 6.Bb2!? Bd6 7.Nf3–/+.

5.cb6 ab6 6.e3 Bb4!-+ 7.Bb5 (7.ab4 Ra1 Pinning (7...Ra1 Deflection)) 7...c6 8.Ba4 Be7 9.Nc3 0-0 10.Nf3 Bg4 11.h3 Bh5 (11...Bf3!? 12.gf3 b5 13.Bb3-+) 12.g4 Bg6 (12...d4!? 13.gh5 dc3 14.dc3 e4-+) 13.Ne5-/+ Bd6 (13...b5 14.Ng6 fg6 15.Bc2-/+) 14.Ng6 (14.Nc6 Nc6 15.Bc6 Rc8=) 14...hg6 15.0-0 Qe7 16.d3?? (better is 16.d4+=) 16...Qe5-+ 17.f4 Qc3 18.Bd2 (18.Ra2 Qa5 19.Bc2 Re8-+) 18...Qd3 19.Rf3 (19.Bc2 Qc4-+) 19...Ne4 20.f5 (20.Be1 Qd1 21.Bd1 (21.Rd1?? Ra4 22.Bb4 Bb4 23.ab4 Rb4-+) 21...Ra3 22.Ra3 Ba3 23.Bc2-+) 20...Qd2 21.Qf1 Qh2 0–1. bogdanmik – wiciogieksa, kurnik, 2014. (=1.a3 e5 2.b4 Nf6 3.c4 d5)

5.cb6 cb6 6.Bb2 d4 (better 6...e4-/+) 7.Qb3? (better 7.Nf3 Bd6 8.d3=+) 7...Be6-+ 8.Qd1 a5 (8...Bd6 9.Nf3-/+) 9.b5 (9.Nf3 Bd6 10.e3 0-0 11.ed4 e4-/+) 9...Be7 (9...Nbd7 10.Nf3 Bd6 11.e3-+) 10.d3 (better 10.Nf3!? Nbd7 11.e3-/+) 10...0-0-+ 11.Nd2 Nbd7 (11...Qd5 12.Ngf3-+) 12.Nc4 (better 12.Ngf3-+) 12...Nc5 Black prepares the advance a4 (better 12...Bc4 13.dc4 Qc7-+) 13.f3?? (better 13.Ne5 Nb3 14.Nc6-/+) 13...Bc4 (13...Nd5 14.g3-+) 14.dc4 a4 15.g4?? (15.Nh3-+) 15...Nb3 (better 15...Ng4 16.fg4 Bh4 17.Kd2 Qg5 18.Kc2 Qg6 19.e4 Qe4 20.Bd3 Nd3 (20...Qd3?! 21.Qd3 Nd3 22.Kd3=) 21.Qd3 Qh1-+) 16.Rb1 (16.Bg2 Rc8 17.g5 Nh5-+) 16...Rc8 (better 16...Ng4 17.e4 Bh4 18.Ke2-+) 17.Qc2 (17.e4 Ng4! 18.fg4 Bh4 19.Ke2 Qg5-+) 17...Rc5 (better 17...Nd5 18.g5 Ne3-+) 18.Qd3 Nd7 (18...e4 19.fe4 Ng4 20.Nf3-+) 19.h4 (19.Nh3 Bh4 20.Nf2 e4 21.Qe4 Re8-+) 19...Bh4 20.Kd1 Bf2 (better 20...h6 21.f4 ef4-+) 21.Qh7 1-0. Paul593 – Holkerwoyd, ChessWorld.net, 2015.

5.d4 ed4 6.Bg5? (better is 6.cb6!? ab6 7.Qd4-/+) 6...bc5-+ 7.Bf6 (7.bc5 Bc5 8.Nf3 h6-+) 7...Qf6 (7...gf6?! 8.bc5 Bc5 9.Nd2-+) 8.Nd2 (8.bc5 Bc5 9.Nf3 0-0-+) 8...cb4 9.Ra2 (9.Qb3 Nc6-+) 9...ba3 10.Nb3 (10.Ngf3 Nd7-+) 10...c5 (better is 10...Bb4!? 11.Nd2-+) 11.e3 Nc6 12.Nf3 (12.Bb5 Rb8 13.Bc6 Qc6 14.ed4 c4-+) 12...Bg4 (12...d3 13.Qd3 Nb4 14.Qb5 Bd7 15.Qb7-+) 13.Be2 (13.Bb5 Rb8 14.Ba4 Kd8 15.Bc6 Bf3 (15...Qc6?! 16.Ne5 Bd1 17.Nc6 Kc8 18.Nd2-+) 16.gf3 Qc6-+) 13...Be7 (13...d3!? 14.Qd3 c4 15.Qd5 cb3 16.Qb3-+) 14.0-0 (14.Nfd4 Be2 15.Ne2 Nb4-+) 14...0-0 (better is 14...d3 15.Qd3 c4 16.Qd5 cb3 17.Qb3-+) 15.Ra3 (15.Nfd4 Be2 16.Ne2-+) 15...c4 16.Na5 (16.Ra4 d3 17.Bd3 Bf3 18.gf3 cd3 19.Qd3 Qf3-+) 16...Ba3 17.Nc6 Qc6 18.Ne5 (18.Nd4 Be2 19.Qe2 Qg6-+) 18...Be2 19.Qe2 (19.Nc6?? Bd1 20.Rd1 d3-+) 19...d3 (19...Qe8 20.ed4 f6 21.Qf3 fe5 22.Qa3 ed4 23.Qa5-+) 20.Qh5 (20.Qd3 cd3 21.Nc6 Rfc8-+) 20...Qe6 21.Nf3 Bc5 22.Qe5 (22.Rc1 Rfc8-+) 22...Qe5 23.Ne5 f6 24.Nd7 Rfc8 25.Nc5 Rc5 26.Rd1 c3 27.Rd3 c2 28.e4 c1Q 0–1. ciesielkaa – eelbandi, kurnik, 2013.

5.Bb2 b6 6.d4 (6.cb6!? ab6 7.Be5=) 6...ed4+= 7.Bd4 (7.cb6!? ab6 8.Qd4+=) 7...bc5-/+ 8.bc5 Be7 (8...Nbd7 9.Qa4 Qc7 10.Nf3-/+) 9.Nf3 (9.Qa4 Qc7 10.Nd2 0-0+=) 9...Qa5 (9...Nbd7!?-/+) 10.Qd2+= Qd2 11.Nfd2 (11.Nbd2 Bf5=) 11...Nbd7 12.g3? (better is 12.Nb3!?+=) 12...Nc5-+ 13.Bc5 Bc5 14.Bg2 0-0 15.0-0 Bd4 16.Ra2 Be6 17.e4? de4-+ 18.Rc2 Bd5 19.Nc3 e3 20.Nd5?! cd5 21.Nb3 ef2 22.Kh1 Be3 23.Nd2 d4 24.Ba8 Ra8 25.Nf3 Ne4 26.Ne5 Nd2 27.Rf2 Bf2 28.Rd2 Be3 29.Re2 Rb8 30.Nc4 Rb3 31.Ne3 Re3 32.Kg2?? Re2 (32...Re2 33.Kg1 d3 34.Kf1 Re6 35.g4 d2 36.Kf2 d1Q 37.h4 Qd3 38.g5 Re2 39.Kg1 Qd1#) 0–1. bogdanmik – zaxaryn, kurnik, 2012. (=1.a3 e5 2.b4 Nf6)

5.Bb2 d4 6.Nf3= White launches an attack 6...Nbd7 (6...Qe7 7.e3 Bg4 8.h3= (8.ed4? e4 9.Qe2 ef3 10.Qe7 Be7-+)) 7.Qb3 (7.e3 Be7=) 7...Be7 (7...b6 8.cb6 ab6 9.e3 de3 10.de3=) 8.e3 de3 9.de3 (9.Ne5 ef2 10.Ke2 Ne5 11.Be5 Bg4 12.Kf2 Be6-+) 9...e4 (9...Qc7!?=) 10.Ng5+/- The mate threat is Qxf7 10...0-0 11.Bc4 Can f7 get defended? (11.Nd2 b6 12.cb6 ab6 13.Nge4 Bb7+/-) 11...Qe8 12.Nc3 Ne5 13.Nge4 Nc4 14.Qc4 Be6 15.Qd3 (15.Qd4 Qb8+=) 15...Rd8 16.Qe2 (16.Nd6 Qd7+=) 16...b5 (16...Ne4 17.Ne4 f6+=) 17.0-0 (better 17.Nf6!? Bf6 18.Ne4+=) 17...Bc4=+ 18.Qf3 Bf1 19.Rf1 Nd5 (19...Ne4 20.Ne4 f5 21.Ng3=+) 20.Nd5= cd5 (20...Rd5 21.Bd4=) 21.Qg3 (21.Ng3!?+/-) 21...f6= 22.Nd2 Qg6 (22...a5+=) 23.Bc1 (better 23.Qg6!? hg6 24.Rd1+/-) 23...Qg3= 24.fg3 (24.hg3 d4=+) 24...f5 (24...Rfe8!?=+) 25.Nb3= Bg5 (25...Bf6 26.Rf5 d4 27.ed4 (27.Nd4?? Rd4 28.ed4 Bd4 29.Kf1 Rf5 30.Ke2 Bg1-+) 27...Bd4 28.Nd4 Rd4 29.Rf8 Kf8 30.Kf2=) 26.Nd4+= a6? (better 26...Rde8 27.Nb5 Be3 28.Be3 Re3 29.Na7 Ra3+=) 27.Ne6+- (27.Nf5 Rde8=+; 27.Rf5 Rf5 28.Nf5 Re8-/+) 27...d4 (27...h6 28.Nd8 Rd8 29.Rf5+-) 28.Ng5 Rf6? (28...de3 29.Be3 Rfe8+-) 29.ed4 Rd4 (29...h6 30.Nf3+-) 30.Bb2 Rg6 (30...Rd3 31.Bf6 gf6+-) 31.Bd4 Rg5 32.c6 Rg6 33.Rc1 (33.Rc1 Re6 34.c7+-) 1-0. sankaravel – charter, gameknot.com, 2014.

5.Bb2 e4 +=.

5.e3 a5 6.d4 (6.Bb2!? e4 7.Ne2=+) 6...ab4-/+ 7.a4? (better 7.Nf3!? ed4 8.ed4-+) 7...ed4 (7...Nbd7 8.Nd2-+) 8.ed4 Bf5 (8...Ne4 9.Nd2 Nd7 10.Ne4 de4 11.Rb1-+) 9.f3? (9.Bd3 Bd3 10.Qd3-+) 9...Be7 (better 9...b6 10.g4 Bg6 11.cb6 Qb6 12.Ne2-+) 10.g4?! (10.Bd3 Bd3 11.Qd3 b6 12.cb6 Qb6-+) 10...Bg6 (better 10...Ng4 11.Ne2 Bh4 12.Ng3 Nh2 13.Qe2 Qe7 14.Qe7 Ke7 15.Bg5 Bg5 16.Nf5 Kf6-+) 11.Nd2 (11.Ne2 Nbd7-+) 11...0-0 (better 11...Ng4 12.Qe2 0-0 13.fg4 Bh4 14.Kd1-+) 12.h4 (12.Ne2 Nbd7 13.Bh3 Re8-+) 12...h6 (12...Ng4 13.Nb3 Bh4 14.Rh4 Qh4 15.Kd2-+) 13.h5 (13.Kf2 Na6-+) 13...Bh7 (better 13...Nh5 14.gh5 Bh4 15.Ke2 Re8 16.Ne4 Bh5 17.Kd2 de4 18.Kc2 ef3 19.Nf3-+) 14.f4 (14.Kf2 Nbd7-+) 14...Re8 (14...Qc7 15.Qf3 Re8 16.Ne2-+) 15.Be2 Qc7 16.Ndf3 (16.Nh3 Ng4! 17.Bg4 Bc5 18.Kf1 Bd4-+) 16...Ng4 17.Ne5 Ne5 (17...Be4 18.Ngf3 Bc5 19.Rg1 Ne5 20.fe5-+) 18.fe5 Nd7 (18...b6 19.cb6 Qb6 20.Nf3-+) 19.Nf3 Be4 20.Rg1 (20.Bf4 Nf8 21.Rg1-+) 20...b5 (20...Bf3!? 21.Bf3 Ne5 22.Kf1 Nf3 23.Qf3-+) 21.Nd2?? (21.Bh6 Bf3 22.Bf3 (22.Rg7? Kh8 23.Bf3 Ne5-+) 22...Ne5 23.Kf1= (23.Rg7? Kh8 24.Rg2 Nf3 25.Qf3 Bc5 26.Kf1 Bd4-+)) 21...Bh4 (21...Nc5 22.Ne4 Ne4 23.Bd3 Bh4 24.Kf1-+) 22.Kf1 ba4 (better 22...Bf5 23.Bg4 Bd3 24.Kg2 Ne5 25.de5 Qe5 26.Nf3-+) 23.Ra4?? (23.Ne4 de4 24.Bh6 Ne5 25.Rg7 Kh8 26.de5-+) 23...Ra4-+ 24.Qa4 Rb8 (better 24...Nc5 25.Qd1 Qc8-+) 25.Qb3? (25.Ne4 de4 26.Qc2 e3 27.Be3 b3=) 25...Bh7?? (better 25...Bf5 26.Qf3 Bc2-+) 26.Qh3?? (better 26.Nf3 Bg5 27.Bg5 hg5 28.Ng5 Nc5 29.dc5 Qe5 30.Nh7 Kh7 31.Rg4=) 26...Bg5-+ 27.Qg4 (27.Qg3 b3! 28.Nb3 Rb3 29.Qb3 Bc1-+) 27...Nf8 (better 27...b3 28.Nf3 b2 29.Bb2 Rb2 30.Ng5 hg5 31.Qg5 Rb1 32.Kf2 Rg1 33.Kg1 Nf8-+) 28.Nf3 Ne6 29.Bg5 Ng5 (29...hg5!? 30.Ng5 b3 31.Nh7 b2 (31...Kh7?! 32.Bd3 Kg8 33.h6=) 32.Nf6 Kh8-+) 30.Ng5=+ hg5 (better 30...f5 31.ef6 hg5 32.Qg5 b3=+) 31.Qg5+/- g6 32.Qf6 (better 32.Bd3 Ra8 33.Kf2+/- (33.hg6 fg6 34.Bg6 Kh8+-)) 32...Rf8?? (better 32...Qd8 33.Qc6 b3=) 33.h6 Qe5 34.de5 Re8 (34...b3 35.Qg7) 35.Qg7 1-0. Paul593 - Larry Larry (1810), ChessWorld.net, 2015.

5.f3 e4 6.f4? (6.Nc3!?-/+) 6...Bf5 (better 6...b6-+) 7.h3?? (7.e3 a5 8.Bb2 b6 9.cb6 ab4-/+) 7...Nbd7 (better 7...Nh5 8.h4 Be7-+) 8.e3-/+ Be7 9.g4?? (9.Ne2 Nh5 10.Kf2 Bh4 11.g3 g5 12.gh4 gf4 13.ef4 Qh4 14.Kg1 Rg8 15.Bg2 Rg2 (15...Nf4?! 16.Nf4 Qf4 17.Qf1-/+) 16.Kg2 Ke7-+) 9...Be6 (better 9...Ng4 10.Qg4 Bg4 11.hg4 a5-+) 10.f5-/+ Bf5 (better 10...Nh5! 11.d4 Ng3-/+) 11.gf5+= 0-0 12.h4 (better 12.Bb2!?+=) 12...Ne5 13.Nc3? (better 13.d4 ed3 14.Bd3=+) 13...Neg4?? (better 13...Nfg4 14.d4 Bh4 15.Kd2 Nf2-+) 14.d4 Qd7 (14...ed3 15.Qd3 a5=) 15.h5?? (better 15.Nh3+/-) 15...Qf5-/+ 16.Kd2? (16.Nh3!? Nh5 17.Kd2-/+) 16...Nf2 (better 16...Ne3 17.Ke3 Ng4 18.Kd2 e3 19.Ke2 Nf2-+) 17.Qe1?? (better 17.Bh3 Qg5 18.Qe1 Nh1 19.Nge2-/+) 17...Nh1 18.Kc2 Qh5 19.Kb3 Ng4 20.b5 (20.Nh3 Bh4 21.Nf4 Qg5-+) 20...Bh4 21.Qe2 Ng3 22.Qd1 a6 23.Nh3 (23.Bh3 f5 24.b6 Nh1-+) 23...ab5 24.Kb4 (24.Nf4 Qg5-+) 24...Qf5 25.Bg2 Bg5 (better 25...b6 26.cb6 Rfb8 27.Nf4-+) 26.Nf4 (26.Qe1 Nh5-+) 26...Bf4 27.ef4 (27.Bh3 Nf2 28.Bf5 Nd1 29.Nd1 Nf5 30.ef4 Ra4 31.Kb3 Nd4 32.Kb2 Nf3-+) 27...e3 (better 27...Nf2 28.Qg1 Nd3 29.Kb3-+) 28.Bh3 h5 29.Ne2 (29.Bg4 hg4 30.Be3 Rfe8-+) 29...Nh1 (better 29...Ne2 30.Qe2 Ra4 31.Kc3 Rc4 32.Kb2 Re8-+) 30.Qe1 (30.Bg4 Qg4 31.Bb2-+) 30...Qc2 31.a4 Qc4 (31...Nhf2 32.Qf2 Qc4 33.Ka3 Ra4 34.Kb2 Rb4 35.Ka3 Ra8) 32.Ka3 Ra4 (32...Qa4 33.Kb2 Qa1 34.Kc2 Qa4 35.Kc3 Qc4 36.Kb2 Ra2 37.Kb1 Qc2) 33.Kb2 Rb4 (33...Nhf2 34.Ra4 Nd3 35.Kb1 Qb3 36.Ka1 Qa4 37.Kb1 Qb3 38.Ka1 Ra8 39.Qa5 Ra5 40.Ba3 Ra3) 34.Qb4-+ Qe2 (34...Qb4 35.Kc2 Qc4 36.Nc3 b4 37.Ra3 e2 38.Bd2 Ne3 39.Be3 e1Q 40.Bd2 Qe4 41.Kc1 ba3 42.Bg4 hg4 43.f5 Nf2 44.f6 gf6 45.Be1 Qe1 46.Kc2 Qcc3) 35.Kb1 Ngf2 (35...Nhf2 36.Bg4 hg4 37.Qc3-+) 36.Ra2 (36.Bf5 Qf1 37.Ra3 Ng3 38.Re3 Nf5-+) 36...Qd1 37.Qb2 Re8 (37...Ng3 38.Qa3 e2 39.Rd2-+) 38.Bd7 Re4 (better 38...e2 39.Be8 Nd3 40.Qd2 Nc1 41.Qc1 Qc1 42.Kc1 e1Q 43.Kc2-+) 39.Ra8 (39.Qe2 Ng3 40.Ra8 Kh7 41.Qd1 Nd1 42.Re8-+) 39...Kh7 40.Bf5 g6 41.Be4 de4 (better 41...Ne4 42.Ra3 Nd2 43.Ka2-+) 42.Ka2 (42.d5 Qc1 43.Qc1+-) 42...e2 (42...Nd3 43.Be3 Nb2 44.Kb2 Qe2 45.Kb3 Qe3 46.Kc2 Nf2 47.d5 Nd3 48.Rh8 Kh8 49.dc6 Qc1 50.Kb3 Qb2) 43.Rf8?? (better 43.d5 f6 44.Qf6 Qd5 45.Ka1+-) 43...e1Q-+ 44.d5 Qa5 45.Kb1 Qd3 46.Qc2 Qb4 (46...Qac3 47.Rf7 Kg8 48.Qd3 Nd3 49.Rf8 Kf8 50.Ba3 Qb3 51.Ka1 Qa3 52.Kb1 Qb2) 47.Bb2 Qc2 (47...Qc2 48.Kc2 Qc5 49.Bc3 Qf8 50.f5 Qa3 51.Kd2 Qa2 52.Ke3 Ng4 53.Kf4 Qf2 54.Kg5 Qf5 55.Kh4 Ne5 56.Be5 Qg4) 0-1. Paul593 - whata kerfuffle (1625), ChessWorld.net, 2009.

5.f3 Bf5 6.e3-/+.

5.h3 b6 6.cb6 ab6 7.Bb2-/+.

5.h3 Be6 6.g3 (6.Nf3 Nbd7+=) 6...Qd7 (6...b6!? 7.cb6 ab6-/+) 7.Nf3+= e4 8.Ng5 (8.Ne5 Qd8+=) 8...Na6 (8...Bf5!? 9.h4 h6-/+) 9.Ne6+= fe6 10.Bg2 e5 11.0-0 Be7 12.e3 (12.d3 ed3 13.ed3 0-0-0=) 12...0-0-0+= 13.f3 ef3 14.Rf3 Ne4 15.d3 (15.Bb2 Ng5 16.Rf1 Rhf8+=) 15...Ng5-/+ 16.Rf1 Nh3 17.Kh2 Ng5 18.e4 de4?? (better is 18...h6 19.ed5 cd5-/+) 19.Bg5+/– ed3? (better is 19...Kb8 20.Be7 Qe7 21.Be4 h5+–) 20.Bh3+– Qh3 21.Kh3 Bg5 22.Qg4 Kb8 23.Qg5 e4 24.Nd2 e3 25.Ne4 Rhe8 26.Nd6 Re6 27.Qf4 Ka8 28.b5 Nc5 29.bc6 Rdd6 30.cb7 Kb7 31.Rac1 Na6 32.a4 d2 33.Qf3 Kb6 34.Rb1 Ka5 35.Qf5 Ka4 36.Qf4 Ka5 37.Ra1 Kb6+– 38.Rfb1 Kc7 39.Qc4 Rc6+/– 40.Qf4 Kd7?? 41.Qf7 Re7?? 42.Qf5 Kd6?? 43.Qd3+– Kc7 44.Ra6 d1Q 45.Rc6 Kc6 46.Qd1 (46.Qd1 Re5 47.Qa4 Kc7 48.Qa7 Kd6 49.Qa6 Kd5 50.Rd1 Kc5 51.Rc1 Kb4 52.Qb6 Rb5 53.Qd4 Ka3 54.Qc3 Ka4 55.Ra1#; 46.Qc4 Kd6 47.Rd1 Ke5 48.Qf4 Ke6 49.Rd6#) 1–0. bogdanmik – makakobecny, kurnik, 2012. (=1.a3 Nf6 2.b4 e5)

5.Bb2 Nc6 6.d3 e4 7.d4 Ng4 8.g3 e3 9.f3 Nf2 10.g4 Nd1 11.Kd1 Bb1 12.Rb1 Qh4 13.Nh3 f5 14.gf5 Nd4 15.Bd4 Qd4 16.Kc2 Qd2 17.Kb3 d4 18.Rb2 Qc3 19.Ka2 Qc4 20.Ka1 Be7 21.Nf4 Bf6 22.Nd3 a5 23.Bh3 ab4 24.Rc1 Ra3 25.Kb1 Qa6 26.Nb4 Ra1 27.Kc2 Qe2 28.Kb3 Qf3 29.Ra1 0-0 30.Nd3 Qh3 31.Ka2 Qf5 32.Nb4 d3 33.Rab1 Bb2 34.Kb2 d2 35.Rd1 Qc5 36.Nd3 Qd4 37.Kc2 Rf6 38.Nb2 Rc6 39.Kb1 e2 40.Rd2 Qd2 41.Nc4 e1R 0-1. getah (1685) - dcdcdcsdcsdcd (2005), Rated Blitz game, lichess.org, 2014.

5.Bb2 Nbd7 6.d4 e4 7.e3 Be7 8.Qc2 Ng4 9.c6 bc6 10.Qc6 0-0 11.Qd5 Ne3 12.fe3 Bh4 13.g3 Qg5 14.Ne2 Qe3 15.Qf5 Nf6 16.gh4 Rad8 17.Qf2 Ng4 18.Qe3 Ne3 19.Kd2 Nc4 20.Kc3 Ne3 21.Bh3 f5 22.Nd2 Nd5 23.Kb3 Rfe8 24.Rac1 Rb8 25.Nc4 f4 26.Ne5 f3 27.Nc3 f2 28.Nd5 Rf8 29.Rhf1 c6 30.Be6 Kh8 31.Ne3 h6 32.Nf7 Kh7 33.Bf5 g6 34.Rf2 Rf7 35.Bg6 Kg6 36.Rf7 Kf7 37.Rf1 Kg6 38.Rf4 Re8 39.Rg4 Kh5 40.Rg7 Kh4 41.Rh7 Kh5 42.Rc7 Rf8 43.Rc6 Rf3 44.Bc1 Kg5 45.Kc4 Kf4 46.Kd5 Re3 47.Be3 Ke3 48.Rf6 Kd3 49.Re6 e3 50.b5 e2 Time forfeit 0-1. Isang (1745) - DankHoe (1760), Rated Blitz game, lichess.org, 2015.

5.Bb2 A) 5...a5 6.b5 (6.Qa4 Qd7 7.b5 cd3 8.Be5 Ng4 9.Bg3 de2 10.Be2 Bd6 11.Bd6-/+) 6...cd3 7.Be5 Bc5 8.e3 Qe7 9.Bf6 Qf6 10.Ra2 Qe6 11.Rd2=; B) 5...cd3 6.Be5 a5 7.ba5 Bc5 8.Bc3 Nc6 9.Qd3 Qd3 10.ed3 Nd4 11.Ra2+=; C) 5...Nc6 6.b5 (6.e3 cd3 7.Bd3 Qd5 8.f3 Be6 9.Qe2 Rd8 10.Bb5 Be7 11.Nd2-/+) 6...Nd4 7.e3 Nb5 8.Be5 Ng4 9.Bg3 cd3 10.Bd3 c6 11.Nf3-/+.

5.Nc3 A) 5...c5 6.dc4 (6.bc5 cd3 7.Nf3 Nc6 8.e4 Bc5 9.Bd3 Bg4 10.0-0 Bd4 11.Bb2-/+) 6...Qd1 7.Kd1 Be6 8.Nf3 Nc6 9.b5 Rd8 10.Bd2 Na5 11.e4-/+; B) 5...a5 6.b5 (6.ba5 cd3 7.e4 Bc5 8.Qd3 0-0 9.Nf3 Ra5 10.Bg5 Be6 11.Qb1-+) 6...cd3 7.Qd3 Qd3 8.ed3 Bf5 9.Nf3 Bd6 10.d4 Nbd7 11.de5-/+; C) 5...cd3 6.Qd3 (6.Be3 Nc6 7.ed3 Nd4 8.Ne4 a5 9.Bd4 Qd4 10.Nf3 Qb2 11.Qb1-+) 6...Qd3 7.ed3 c5 8.bc5 Bc5 9.Ne4 Ne4 10.de4 Nc6 11.Bb2-/+.

5.dc4 Qd1 6.Kd1 a5 7.b5 Bc5 8.e3 Bf5 9.Nf3 Nbd7 10.Bb2 0-0-0 11.Ke1 +=.

5.dc4 Qd1 6.Kd1 Ne4 7.Be3 (7.Ke1 a5 8.f3 Nf6 9.b5 Bc5 10.Nc3 Be6 11.e4-/+) 7...f5 (7...Be6 8.Nd2 Nd2 9.Bd2 Bc4 10.Rc1 Bb3 11.Ke1-/+) 8.f3 (8.Nd2 Nc3 9.Kc2 Na4 10.g3 a5 11.b5+=) 8...Nd6 (8...f4 9.fe4 fe3 10.Nc3 c6 11.c5-/+) 9.Nd2 (9.c5 Nf7 10.Nc3 Be6 11.Bd2+=) 9...f4 (9...Be6 10.Rc1 a5 11.c5-/+) 10.Bf2 Be6 (10...a5 11.b5+=) 11.e4 (11.e3+=) 11...Nd7 12.Bd3 a5 13.c5 ab4 14.cd6 Bd6 15.a4 b3 16.Kc1 Nc5 17.Bc5 Bc5 18.Ne2 Be3 19.Rd1 c6?? (better is 19...0-0-0!? 20.Kb2 Rd3 21.Nf1-+) 20.Nc3?? (20.Kb2!?+/–) 20...b5?? (better is 20...0-0-0 21.Bf1 Rd2 22.Rd2 b2 23.Kb2 Bd2-+) 21.ab5?? Ra1-+ 22.Bb1 Bd4 23.Kb2 cb5 24.Nb3 Bb3 25.Kb3 Ke7 26.Nb5 Rb8 27.Kc4 Ra4 28.Kd3 Rb5 29.Bc2 Ra3 30.Ke2 Rb2 0–1. cr50 – lupo_alberto, ChessWorld.net, 2011.

5.dc4 Qd1 6.Kd1 Bf5 7.Nc3 Nc6 8.e3 Rd8 9.Ke1 Ne4 (9...a5 10.b5 Nb8 11.Nf3+=) 10.Ne4 Be4 11.f3 Bc2 12.Bd2 f5 (12...Be7 13.Bc3 Bh4 14.g3=) 13.Ne2 e4 14.Nc3 (14.Bc3!? a6 15.b5 ab5 16.cb5+/–) 14...ef3+= 15.gf3 g6 (15...Ne5!? 16.Be2 Nd3 17.Bd3 Bd3+= (17...Rd3?! 18.Rc1 Bb3 19.Nb5=)) 16.Nd5 (16.Rc1 Bb3 17.Nd5+=) 16...Bh6 (better is 16...Ne5!? 17.Nc7 Kd7=) 17.Rc1 Bb3 18.Kf2 (18.Bc3 0-0 19.b5 Nb8+/–) 18...Rf8 Black intends f4 (18...Kf7 19.Bc3 Rhe8 20.Re1+=) 19.Rc3 Ba4 20.h4 (20.Nc7 Kf7 21.Nd5 Rfe8+=) 20...b5 (20...Rd7 21.h5 g5 22.Be2=) 21.h5 bc4 (21...Bg7 22.Nc7 Kf7 23.hg6 hg6 24.Be1+/–) 22.Bc4+/– f4?? (better is 22...Bg7 23.Nc7 Ke7 24.Nd5 Kd6 25.hg6 hg6+/–) 23.e4 (better is 23.hg6 Bg7 24.gh7+–) 23...g5 0–1. sacaniev – chaos999, kurnik, 2013.

5.e3 A) 5...a5 6.ba5 (6.b5 cd3 7.Qd3 Bd6 8.e4 Nbd7 9.Be3 Ng4 10.Nf3 Ne3 11.Qe3-/+) 6...cd3 7.Bd3 Ra5 8.Bd2 Ra7 9.Qc2 Bg4 10.Ne2 Nbd7 11.Ng3-/+; B) 5...c5 6.bc5 (6.d4 ed4 7.Bc4 Nc6 8.Qb3 Ne5 9.Nf3 Nc4 10.Qc4 Be6 11.Qb5-/+) 6...cd3 7.Qd3 Nbd7 8.Nd2 Bc5 9.Bb2 0-0 10.Ngf3 Qc7 11.Rc1-/+; C) 5...cd3 6.Qd3 (6.Bd3 e4 7.Bb5 Bd7 8.Bc4 b5 9.Be2 a5 10.ba5 Ra5 11.Bb2-+) 6...Bd6 7.e4 a5 8.b5 Nbd7 9.Nc3 Nc5 10.Qc2 Be6 11.Bg5-/+.

5.Bb2 Nc6 6.b5+= Nd4 (6...Nce7 7.Be5 f6 8.Bg3+=) 7.e3 Ne6 8.Be5 Bd7 (8...Be7 9.Nc3+=) 9.Nf3+/– c6 10.Bc4 f6 11.Bg3 Qb6 (11...Nb6 12.Be6 Be6 13.bc6 bc6 14.Nd4+/–) 12.bc6 (12.0-0 Ndc7+/–) 12...Bc6 (12...Qc6 13.d3+/–) 13.0-0 0-0-0 (13...Rc8 14.e4 Ndf4 15.Nc3+/–) 14.d4 (14.Nc3 Ndc7+–) 14...Qb2 (14...Bd6 15.Bd6 Rd6 16.Nbd2+–) 15.Ra2 Qb6 16.Qc2 Bd6 (16...Ndc7+–) 17.Bd5 Bg3 (17...Nc7 18.Rb2 Qa6 19.Bc6 Qc6 20.Bd6 Qc2 21.Rc2 Rd6 22.Rfc1+–) 18.Be6 (18.fg3?! Rd5 19.Nc3 Ra5+–) 18...Kb8 19.Rb2 (19.Rb2 Bh2 20.Nh2+–) 1–0. Wall,Bill – Guest6791, internet, 2004.

5.Bb2 Bd6 6.Qc2 0-0 7.Nf3 Qf6 (7...Re8!?=+) 8.Qe4= Be6 9.Be5 Be5 10.Qe5 Qe5 11.Ne5 Re8 12.d4 Bf5 13.e3 Nd7 14.Nd7 Bd7 15.Nd2 a5 16.b5 Nc3 17.a4 c6 18.b6 (18.Ra3 Nd5+/–) 18...Nd5 19.Nc4 Nb4 20.Rc1 Bf5? (Better is 20...Be6+/–) 21.Nd6+– Nc2 (21...Be4 22.Ne8 Re8+–) 22.Kd2 (22...Bg6 23.Ne8 Re8 24.Rc2 Bc2 25.Kc2+–) 1–0. Trkn – guest746, ICC, 2004.

5.Bb2 Bd6 6.e4 Nf6 7.Nc3 Nc6 8.Bb5 Bd7 9.Nf3 Nd4 10.Bd7 Qd7 11.0-0 0-0 12.Nd4 ed4 13.Ne2 Be5?? 14.d3 Qd6? 15.f4+– Ng4 16.fe5 Qe7 17.Bd4 Rfd8 18.Qd2 Ne5 19.Be5 Qe5 20.Qf4 Qf4 21.Nf4 g5 22.Nd5 c6 23.Ne7 Kf8 24.Nf5 Rd3 25.Nh6 Kg7 26.Nf7 Kg6 27.Ne5 Kg7 28.Nd3 Rd8 29.Nc5 Rd4 30.Ne6 Kg8 31.Rf8# 1–0. Viereck,Marten – Pinka,Maximilian, Sachsen–ch U10, 2006.

5.e3 a5 6.b5 Bd6 7.Bb2 0-0 8.Bc4 Nb6 9.Be2 N8d7 10.Nf3 e4 11.Nd4 Qg5 12.0-0 Qe5 13.g3 Nf6 14.Nc3 Re8 15.Qc2 Bh3 16.f4 Qe7 17.Rfe1 h5 18.Bf1 Bf1 19.Rf1 Qd7 20.Nd1 Rac8 21.Nf2 Nbd5 22.Rac1 Rcd8 23.Qc4 Nb6 24.Kg2?? (better is 24.Qc2=) 24...Nc4-+ 25.Rc4 Nd5 26.h4 Nb6 27.Rcc1 Na4 (27...Na4 28.Bc3 Ba3-+) 0–1. combijack (1770) – guardiao (1915), gameknot.com, 2010.

5.e3 c5 6.b5 Be7 7.Bb2 Qc7 8.Qc2 0-0 9.Nf3 Nd7 10.Bc4 N5b6 11.h4 (better is 11.Bd3!? g6 12.0-0=) 11...Nc4-/+ 12.Qc4 Nb6 13.Qc2 f6 14.Nc3 Be6 15.h5 Rad8 16.h6 g6 17.Qe4 Nc4 18.Bc1 f5 19.Qc2 e4 20.Ng1 Ne5 21.Nge2 Nd3 22.Kf1 Bg5 23.f4 ef3! 24.gf3 Bc4 25.Ne4 fe4 26.Qc4 Qf7 27.Qf7 Rf7 28.f4 Bf6 29.Rb1 b6 30.Rh2 Nc1 31.Nc1 Rd3?? (better is 31...Rfd7 32.Ke1 c4-/+) 32.Nd3+– ed3 33.Kg2 c4 34.Kf3 Re7 35.e4 c3 36.dc3 Bc3 37.e5 d2 38.Ke3 Rd7 39.Rd1 Bd4 40.Ke2 Bc3 41.Rh3 Ba5 42.Rd3 Rc7 43.R1d2 Bd2 44.Kd2 Kf7 45.Ke3 Ke6 46.Ke4 Rc4 47.Rd4 Rc3? 48.a4 Rh3 49.Rd6 Ke7 50.Rc6 Rh6 51.Rc7 Ke6 52.Ra7 Rh4 53.Rb7 g5 54.Rb6 Ke7 55.Rf6 gf4 56.Rf4 Rh1 57.Kd5 h5 58.b6 h4 59.e6 h3 60.b7 Rb1 61.Kc6 h2 62.Rh4 Rc1 63.Kb6 h1Q 64.Rh1 Rh1 65.a5 Rb1 66.Ka7 Ke6 67.b8Q (67.b8Q Rf1 68.Qb3 Kf6 69.a6+–) 1–0. combijack (1835) – romast (1700), gameknot.com, 2013.

5.e3 Bd6 6.Bb2 0-0 7.Nc3 Be6 8.Nb5 c6 9.Nd6 Qd6 10.Nf3 Nd7 11.d4 ed4?? (11...e4 12.Nd2 f5 13.Qc2=) 12.Nd4 (better is 12.Qd4 f6 13.e4+/–) 12...N7f6 13.Bd3 Rad8 14.Qc2 Rfe8 15.0-0 h6 16.Rad1 Ng4 17.Nf3 Qc7 18.Bd4 Ne7 19.h3 Nf6 20.Qb2 Ned5 21.Be5 Qe7 22.Nd4 Bc8 23.Nf3 Qe6 24.Bd4 a6 25.Ne5 Re7? 26.Rc1 Ne8 27.g4 Nd6 28.Nc6 bc6-/+ 29.Rc6 Qd7 30.Rfc1 Bb7 31.R6c5 h5! 32.Bg7 hg4 33.Bh6 f6 34.Rd5 Bd5 35.Qf6 gh3?? 36.Kh2 Qe6-/+ 37.Qg5 Kf7 38.Qh5 Kg8 39.Qg5 Kf7 40.Qh5 ½–½. Campos Calvo (2035) – Alvarez Escudero (1910), Madrid–ch Seniors, 2008.

4.Bb2 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.a3).

4.b5 a6-/+ 5.a4 ab5 6.cb5 b6 (6...d5!?-/+) 7.e3=+ Nbd7 8.d3 h6 9.f3 (9.Nc3!?=+) 9...Nc5 10.g4? (10.d4 ed4 11.ed4 Ne6-/+) 10...g5?? (better 10...Bb7!? 11.e4 d5 12.Nc3-+) 11.h4 (11.d4 Ncd7 12.Nc3-/+) 11...Nd5 (11...gh4 12.Rh4 Bg7 13.Rh2-+) 12.h5? (12.d4 Ne6 13.Bc4 Bb7=+) 12...f5 (better 12...Bb7-+) 13.Bh3?? (better 13.gf5 Bb7 14.e4=+) 13...f4 (13...fg4 14.Bg4 Bg4 15.fg4-+) 14.e4 Nb4 15.Bf1 d5 16.Ba3 Ne6 (16...Na4!? 17.Nd2 Nc3 18.Qc1-+) 17.Nc3 d4 18.Nd5 (better 18.Nb1 c6 19.bc6 Nc6 20.Nd2-+) 18...Nd5 19.Bf8 (19.ed5 Ba3 20.Ra3 Qd5 21.Nh3-+) 19...Ne3 20.Qb3 Nf8 (20...Rf8 21.Kf2-+) 21.Bh3 (21.a5 Be6 22.Qb2 Ra5 23.Ra5 ba5-+) 21...Be6 22.Qb4 (22.Qb1-+) 22...Nc2 23.Kd2 Nb4 24.Ne2 Nd5! 25.ed5 Bd5 (25...Qd5 26.Rhf1-+) 26.Rhc1 Bf3 27.Rc2 Be2 28.Ke2 Ne6 (better 28...Qd5 29.Kf2 e4 30.Kg1-+) 29.Kf3 Qd5 30.Ke2 f3 31.Kd2 Nf4 (31...Qb3!? 32.a5-+) 32.Bf1 Ne2! 33.Ke1 (33.Be2 fe2 Passed pawn) 33...Rf8 34.Rc7 Qb3 35.Be2 (35.Rd1 Ng3 36.Kd2 Ra4 37.Rc8 Kd7 38.Rdc1 Rc8 39.Ke1 Rc2 40.Rc2 Qc2 41.Be2 Qe2) 35...fe2 36.Rac1 (36.Rc5 bc5 37.Ke2 Qb2 38.Ke1 Qg2 39.a5 Rf1) 36...Qd3 37.Rb7 (37.Rc8 Rc8 38.Rc8 Ke7 39.Rf8 Qd1 40.Kf2 e1Q 41.Kg2 Qg4 42.Kh2 Qeh4) 37…Rf1 0-1. Paul593 - yogi 58, ChessWorld.net, 2009.

4.b5 b6 5.a4 Nbd7 6.g3 Ne4 7.Bg2 f5 8.g4 Nec5 9.Ba8 Bb7 10.Bb7 Nb7 11.Qc2 Nbc5 12.Qf5 g6 13.Qe6 Be7 14.Nc3 Nb3 15.Rb1 Nc1 16.Rc1 g5 17.Nd5 h6 18.Rc3 a5 19.Rf3 Rf8 20.h4 Rf3 21.Nf3 gh4 22.Rh4 Nc5 23.Qf5 Na4 24.Rh6 Nb2 25.Rh8 Bf8 26.Ng5 Nc4 27.Rf8 Normal 1-0. beginner1999 - Alfredo76, Rated Blitz game, lichess.org, 2015. (=1.a3 e5 2.b4 Nf6)

4.Qc2 Nc6 5.c5 d5 6.Bb2 d4 7.b5 Ne7 8.c6 g6 9.Nf3 Bf5 10.d3 b6 11.Ne5 Bg7 12.Qb3 0-0 13.g3 a6 14.Bg2 ab5 15.Qb5 Ra5 16.Qb4 Re5 17.Bd4 Re6 18.Nd2 Nc6 19.Bf6 Bf6 20.Qb1 Ba1 21.Qa1 Bd3 22.0-0 Be2 23.Re1 Bg4 24.Re6 fe6 25.Ne4 Bf3 26.Bf3 Rf3 27.h4 Nd4 28.Ng5 Ne2 29.Kg2 Qd5 30.Nf3 Nd4 31.Qd1 e5 32.Kh3 Qe6 33.g4 Nf3 34.Qf3 e4 35.Qd3 h5 Normal 0-1. riopersempre – KonstantinSh, Rated Blitz tournament ZCvW1l1G, lichess.org, 2015. (=1.a3 e5 2.b4 Nf6)

4.Nc3 c6 5.e4 Be6 (5...a5 6.b5=) 6.d3 (6.Nf3 a5 7.b5 cb5 8.cb5 Nbd7=) 6...Be7 7.Nf3 0-0 8.g3 (8.d4 a5 9.b5 cb5 10.cb5 Nbd7=) 8...h6 9.Nh4 (9.d4 Nbd7=) 9...Ng4 (9...a5 10.b5 d5-/+) 10.Bh3? (10.Be2 Qd7=) 10...Bh4 (better is 10...Nf2 11.Kf2 Bh3-/+) 11.Bg4= Bf6 (11...Be7 12.Be6 fe6 13.Qg4+=) 12.Be6+= fe6 13.0-0 d5 14.cd5 ed5 15.Qg4 (15.ed5!? Qd7 16.Qb3+=) 15...d4 16.Ne2 Nd7 (better is 16...Qd7!? 17.Qg6 Qh3=) 17.Bh6+/– Kh7 18.Bd2 Rh8 19.Qe6 Nf8 20.Qf5 Kg8 21.Rfc1 (21.f4 Qe7+/–) 21...Qe8 22.Rab1 Rh5 23.Qf3 Qg6 (23...Ne6 24.Qg4+/–) 24.b5 Ne6 (24...Qe8!?+/–) 25.bc6+– bc6 26.Rc6 Ng5 27.Bg5 Qg5 28.h4! Rh4 29.Kg2 Rh6 30.Ng1 Kh7 (30...Rf8 31.Qe2+/–) 31.Rb7 Rh8 (better is 31...a6!?+/–) 32.Nh3+– Qh5 (32...Qg6 33.g4 Ra8 34.g5+–) 33.Qh5 Rh5 34.Ra7 Kg6 (34...Rf8 35.f4+–) 35.Ng1 (better is 35.f4+–) 35...Rh2 36.Kf3 Rh1 37.Ne2 R8h2 (37...Rd1 38.Nc1 Rh2 39.Rb7+–) 38.a4 (better is 38.Nd4 ed4 39.e5+–) 38...Rf1 39.Kg4 Rff2 40.Nc1 (40.Ng1!?+/–) 40...Rh1 (40...Kh7 41.Nb3=) 41.Nb3 (41.Rac7 Rhh2+/–) 41...Rg2 (better is 41...Kh7=) 42.a5?? (better is 42.Rc1 Rh4 43.Kf3=) 42...Rhg1-+ 43.a6?? (better is 43.Kf3-+) 43...Rg3 0–1. vipernsx (2190) – jlbaf (2430), net–chess.com, 2016.

4.Nc3 Nbd7 5.Nf3 c6 6.Qc2 Be7 7.e3 0-0 8.Be2 Re8 9.Bb2 Qc7 10.0-0 Nf8 11.d4 N6d7 12.Rfd1 g6 (12...a5!?+=) 13.c5+/– ed4 14.cd6 Bd6 15.Ne4 Be7 16.Rd4 f6? (better is 16...Nf6+/–) 17.Qb3+– Kg7 18.Neg5!! (18.Neg5 Ne5 19.Ne5+–) 1–0. pcmvr – mgilbert (2100), net–chess.com, 2016.

4.Nc3 Be6 5.Nd5 (5.Nf3!?=+) 5...Nd5-/+ 6.cd5 Bd5 7.Bb2 Be6 (7...a5 8.b5-/+) 8.e4 (8.Nf3 Be7-/+) 8...Be7 9.Qc2 0-0 10.f3? (10.Nf3 a5-/+) 10...f5 (10...a5 11.Nh3-+) 11.d4? (11.Bc4 Qd7 12.Be6 Qe6 13.Qc7 Rf7 14.ef5 Qf5-/+ (14...Rf5?? 15.Qb7 Rf8 16.Qa8+-)) 11...f4?? (11...fe4 12.Qe4 d5 13.Qe5-+) 12.d5? (12.Bc4!? Bh4 13.Kf1 Bc4 14.Qc4 Rf7 15.de5 de5 16.Ne2-/+) 12...Bd7 (12...Bh4 13.Kd1 Bf7 14.Bd3-+) 13.b5 (13.Nh3 a5-/+) 13...c6 (13...Bh4 14.Kd1-+) 14.bc6 bc6 15.Bc4 c5 (better 15...Bh4 16.Kd1 Kh8-+) 16.h4? (better 16.Ne2-/+) 16...Bh4-+ 17.Ke2 (17.Kf1 Be8-+) 17...Bg3 (17...Be8 18.Kf1-+) 18.Nh3 (18.Kf1 Bc8-+) 18...Bh3 (better 18...Be8!? 19.Rhb1-+) 19.Rh3 Rf6 (19...Nd7 20.Kf1-+) 20.Rah1 Rh6 (20...h6-/+) 21.Bb5?? (better 21.Rh6!? gh6 22.Rh6=) 21...Rh4 (21...Rh3 22.gh3 Qb6 23.Bc4-+) 22.Bc3 (22.Rh4 Bh4 23.Bc6 Nc6 24.dc6-/+) 22...g5 (better 22...Rh3!? 23.Rh3 Nd7-+) 23.Qa4 h5 (23...Rh3!? 24.Rh3 Kg7=+) 24.Rh4= Bh4 25.Ba5 (25.Be8 c4 26.Rb1 g4+/-) 25...Qe7 26.Bc6 Nc6 27.Qc6 Rb8 28.Bd2?? (better 28.Bc7 Rb2 29.Kd3 Rg2 30.Bd6+-) 28...Rb2 29.Qa8 Kg7 30.Ra1 (30.Qc6 Kf7-+) 30...g4 31.a4 (31.Qc8-+) 31...c4 (better 31...gf3 32.Kd3 fg2-+) 32.Rc1 (32.Kd1 c3! 33.Kc1 Rd2-+) 32...gf3 33.gf3 Bg3 (better 33...Bf2! 34.Qc8 Be3-+) 34.Rc4= Kh7 (better 34...Bh4=) 35.Rc8+/- Qg7 36.Rd8?? (better 36.Qc6 Rb7 37.Qe8+/- (37.Qd6?! Be1 38.Ke1 Qg3 39.Ke2 Qg2 40.Ke1 Qg3 41.Ke2 Qg2 42.Ke1 Qg3=)) 36...Rb6 (36...Be1 37.Rh8 Qh8 38.Qh8 Kh8 39.Ke1 h4-+) 37.Ba5 (better 37.Qc8 Bh4 38.Qf5 Kh6 39.Qe6 Bf6 40.Rg8+-) 37...Rb2? (better 37...Bh4!? 38.Rh8 Qh8 39.Qa7 Kg6 40.Qb6 Be7+=) 38.Kd3+- Rb3 39.Kc4 Rb7 (39...Rb1!? 40.Rd6 Qb7 41.Qb7 Rb7+-) 40.Rd6+- Bf2 (40...Qf7 41.Bd8 h4 42.Qc8+-) 41.Qc8 (better 41.Qe8 Rf7 42.Re6+-) 41...Rb2?? (41...Rf7 42.Qe6 Bh4+-) 42.Qf5 Kh8 43.Rd8 (43.Rd8 Qg8 44.Qe5 Kh7 45.Qh5 Kg7 46.Bc3 Bd4 47.Bd4) 1-0. Paul593 - brain50, ChessWorld.net, 2012.

4.Nc3 Be7 5.e4 +=.

4.Nc3 Bf5 5.d3 Be7 6.e4 Bg6 (6...Be6 7.Nf3=) 7.Nf3 0-0 8.Be2 Na6 9.g3 (9.0-0 c6+=) 9...c6 10.Nh4 Nc7 11.0-0 Ne6 12.Rb1 Qd7 13.Be3 Nd4 14.Bd4 (14.Ng6 fg6 15.f4 Rae8+=) 14...ed4= 15.Na2 h5 (15...h6 16.Ng6 fg6 17.Nc1=) 16.Ng6+= fg6 17.Nc1 Ng4 18.Nb3 c5 19.Bf3 Ne5 20.Bg2 Qc7 21.bc5 (21.h3 a6+/–) 21...dc5+= 22.Qe2 Rf6 (22...g5 23.Qh5 Nd3 24.Nd2+=) 23.f4+/– Ng4 24.Nd2 Rb6 25.e5 Ne3 26.Bd5 Kh7 27.Rfe1 Kh6 (27...Rb8 28.Rb6 Qb6 29.Be4+/–) 28.Nf1 Nf5 29.g4 hg4 30.Qg4 Kh7 31.Nd2 Nh6 32.Qg3 Nf5 33.Qh3 (33.Qh3 Nh6 34.Ne4+–) 1–0. pcmvr – pierred (2775), net–chess.com, 2016.

4.Nc3 g6 5.d3 Bg7 6.Nf3 0-0 7.e4 Bg4 8.Be2 Nbd7 9.h3 Bf3 10.Bf3 c6 11.0-0 Ne8 12.Bg4 f5 13.Bf3 Nef6 14.ef5 gf5 15.Rb1 White prepares the advance b5 15...Qe8 16.b5 Rc8 17.Be3 f4 (17...a6!?+=) 18.Ba7+/– Qg6 19.bc6 bc6 20.Rb7 Kh8 (20...Rf7 21.Ne4 Bf8 22.Qe2+–) 21.a4 Rg8 22.a5 Bf8 23.a6 Nc5 (23...Qf5 24.Kh2+–) 24.Bc5 dc5 25.Qe2 Bd6 26.a7 Ra8 (26...Qf5 27.Re1 Qg5 28.Ne4 Ne4 29.Be4+–) 27.Bc6 Rae8 (27...Rgc8 28.Qf3 Rd8+–) 28.Qf3 1–0. pcmvr – jlbaf (2430), net–chess.com, 2016.

4.d3 Be7 5.Nf3=+.

4.d3 g6 5.e4 Ng4 (5...Bg7 6.Nc3=+) 6.f3 (6.Be2!? Nf6 7.Nf3=) 6...Nf6=+ 7.g4 h6 8.h4 c5 9.b5 Bg7 10.a4 a5 (10...a6!?-/+) 11.Qb3 0-0 12.g5 (12.Nc3 Be6=) 12...Nh5 (12...hg5!? 13.Bg5 Qb6=+) 13.Ne2 (13.gh6 Bf6 14.Ne2 Bh4 15.Kd1 Bg5=) 13...b6 (better 13...Kh7=) 14.Nd2?? (better 14.gh6 Bf6 15.Nbc3+/-) 14...Bb7 (14...hg5 15.hg5 Qg5 16.Nb1-/+) 15.Bb2? (15.Nb1 hg5 16.hg5 Nf4 17.Nf4 ef4=+) 15...f6 (better 15...hg5 16.hg5 Qg5-+) 16.0-0-0=+ Qe7 17.Rg1 (17.Bh3!? fg5 18.hg5 hg5 19.Nc3=+) 17...hg5=+ 18.Bh3 gh4 (better 18...Kf7 19.hg5 fg5=+) 19.Rg4?? (better 19.Rg6 Kf7 20.Bf5+=) 19...g5-+ 20.Kc2 (20.Rg2 Nd7-+) 20...Nd7 (20...Bc8 21.Rdg1-+) 21.Nc3 Bc8 (21...Nf4 22.Rh1-+) 22.Nd5 Qd8 (22...Qf7-+) 23.Nf1? (23.Rgg1 Nf4 24.Bf5 Bb7-+) 23...Ra7?? (23...Nf4!? 24.Nf4 ef4 25.Rg1-+) 24.Kb1? (24.Nfe3 Re8-/+) 24...Bb7 (24...Nf4 25.Nf4 ef4 26.Rg1-+) 25.Bc1 (25.Nfe3 Nf4 26.Rh1 Re8-/+) 25...Ba8 (25...Nf4 26.Bf4 ef4 27.Rg2-+) 26.Nde3? (better 26.Nfe3!?-/+) 26...Nf4-+ 27.Bg2 Ne2 (27...h3 28.Bh1 Rf7 29.Nf5-+) 28.Bd2 (28.Nf5 Nd4 29.Nd4 cd4 30.c5 Kh7-/+) 28...Nd4 29.Qb2 Ne2 30.Bh3?? (30.Qb3 Kf7 31.Nf5-+) 30...Nb8 (better 30...Nf4 31.Rf4 ef4 32.Bd7 Rd7 33.Nf5-+) 31.Ng3?? (better 31.Nf5 Nd4 32.N1e3-/+) 31...Ng3-+ (worse 31...hg3 32.Nf5-+) 32.Nd5 (32.Rg3 hg3 33.Be6 Raf7-+) 32...Ne2 (32...Re8 33.Rg1-+) 33.Be3 (33.Bg5 fg5 34.Qe2 Bd5 35.cd5-+) 33...Ng3 34.Nc3?? (34.Bd2 Re8 35.Be3-+) 34...Raf7 35.Ne2 (35.Rg1 Nh5-+) 35...Ne2 36.Qe2 f5 (36...Nd7!? 37.Rg2-+) 37.ef5?? (better 37.Bg5 Qe8 38.Rh4 fe4 39.de4 Rf3 40.Rd6=+) 37...Bh6 (37...Rf5 38.Qd2 Bf3 39.Rg5 Rg5 40.Bg5-+) 38.Rgg1 (38.Rh4 gh4 39.Bh6 Kh8 (39...Rf5 40.Qg2 Kf7 41.Qg7 Ke8 42.Bf5 Rf5 43.Qg6 Rf7 44.Qg8 Kd7 45.Qf7 Qe7 46.Qh5+-) 40.Bf8 Qf8-+ (40...Rf8 41.f4 Qe8 42.Rg1=+)) 38...Rf6 (better 38...Rf5 39.Bf5 Rf5 40.f4 ef4 41.Bf2-+) 39.Qh2? (39.Bg5 Bg5 40.Rg5 Kf7-+) 39...Bf3 (better 39...Rf5 40.Bf5 Rf5 41.Qh4 Qf6-+) 40.d4 (40.Bg5 Bg5 41.Rg5 Kf7 42.Rf1-+) 40...Bd1 41.de5 (41.Rd1 cd4 42.Bc1-+) 41...R6f7 (41...de5!? 42.Qd2 Qd2 43.Bd2-+) 42.f6 (42.Rd1 Re7 (42...Rf5?! 43.Rd6 Qe7 44.Bf5 Rf5 45.Rh6-+) 43.e6 Ree8-+) 42...Ba4 (better 42...de5 43.Bg5 Qd3 44.Kc1 Qc4 45.Kb1 Bg5 46.Rg5 Kh8 47.Bf5 Rf6 48.Qe5-+) 43.Be6 (43.Bg5 Kh8 44.Bf5+/-) 43...Qc7 (better 43...de5 44.Bg5 Qd3 45.Kb2 Bg5 46.Rg5 Kh8 47.Bf7 Qb3 48.Ka1 Qd1 49.Kb2 Qd4 50.Kb1 Qe4 51.Kb2 Rf7 52.Rh5 Rh7 53.Re5 Qd4 54.Kb1 Qd3 55.Kb2 Qb3 56.Ka1 Qc3 57.Qb2 Qb2 58.Kb2-+) 44.Bf7?? (better 44.Bg5 Kh8 45.Qh4+-) 44...Qf7-+ 45.Bg5 (45.Qh4 Qg6 46.Ka1-+) 45...Qg6 46.Ka1 Bg5 47.Ka2 Nd7 48.Rf1 Ne5 49.Qh1 Qc2 50.Ka1 Qc3 51.Ka2 Qc2 (51...Bb3 52.Kb1 Qc2 53.Ka1 Qa2) 52.Ka1 Qc3 53.Kb1?? (53.Ka2 Bb3 54.Kb1 Qc2 55.Ka1 Qa2) 53...Bc2 54.Ka2 Qb3 55.Ka1 Qa3 0-1. Paul593 – JUNIOR, ChessWorld.net, 2009.

4.d3 h6 5.b5 (5.Nf3 Be7=+) 5...c6 6.bc6 (6.Nc3 cb5 7.Nb5 Be7=+) 6...Nc6-/+ 7.Nc3 (7.Nf3 e4 8.de4 Ne4-/+) 7...Be7 (7...d5!?-/+) 8.e4=+ Nd4 9.Be3 (9.Nf3 Nf3 10.Qf3 0-0=) 9...0-0 (9...Ng4 10.Nd5=+) 10.Nf3=+ Bg4 (10...Nf3 11.gf3 Be6 12.Qd2=+) 11.h3 (better 11.Be2!? Qa5 12.Bd2 Ne2 13.Qe2=) 11...Bf3 12.gf3 Ne6 (12...Qa5 13.Bd2 Qc5 14.Rb1-/+) 13.Be2 (13.Rb1 b6=+) 13...Nh5 14.Nd5 Nf6 15.h4 (15.Nc3!?=) 15...Nd5=+ 16.cd5 Nc7 (16...Nf4 17.Bf4 ef4 18.Rb1=+) 17.f4 (17.Rb1!?+=) 17...ef4=+ 18.Bf4 Nb5 (18...f5 19.Be3 Bh4 20.Rb1=+) 19.Qd2 (better 19.d4 Re8 20.Bb5 Qa5 21.Ke2 Qb5 22.Qd3=) 19...Qb6 (19...Nd4 20.Bd1=+) 20.Rg1?? (better 20.Rb1 Qc5 21.Qb4 Qb4 22.Rb4+- (22.ab4?! f5=)) 20...g5?? (better 20...Bh4 21.Bh5 Bf6=+) 21.Be3 (21.Rb1 Bf6 22.e5 Be5 23.Be5 de5 24.hg5 a6+-) 21...Qa6 (21...Nd4 22.hg5 Rac8+-) 22.hg5 hg5 (22...Bd8 23.gh6 Kh7 24.Rg7 Kh8+-) 23.Bg5 f6 (23...Kh7 24.Qf4 Qa5 25.Kf1 Qe1 26.Re1 f6 27.Qh2 Kg8 28.Be3 Kf7 29.Qh5) 24.Bf6 Kf7 25.Be7 (25.Bh5 Kf6 26.Qf4) 25...Ke7 26.Rg7 Ke8 (26...Kd8 27.Rc1 Nc7 28.Rcc7 Rf7 29.Rgf7 Qa5 30.Qa5 b6 31.Qb5 Rc8 32.Qd7) 27.Bh5 Kd8 28.Qg5 Kc8 29.Rc1 (29.Qe7 Qa5 30.Kf1 Rf2 31.Kf2 Qd2 32.Be2 Qf4 33.Kg2 Qh2 34.Kh2 Na3 35.Qc7) 29...Kb8 30.Rg8 Rg8 (30...Qa5 31.Kf1 b6 32.Rf8 Kb7 33.Ra8 Ka6 34.Bg4 Qe1 35.Ke1 Nd4 36.Bc8 Kb5 37.Rc4 Nc2 38.Kf1 Nb4 39.Rb4 Kc5 40.d4) 31.Qg8 1-0. Paul593 - ron123 (1605), ChessWorld.net, 2011.

4.d4 ed4 5.Qd4 Nc6 6.Qd1 Be6 7.e3 g6 (7...a5!? 8.b5 Ne5=+) 8.Bb2 Bg7 9.Nf3 0-0 10.Be2 Ne4 11.Bg7 Kg7 12.0-0 Qf6 13.Nd4 Bd7 14.Ra2 (better 14.f3 Nd4 15.Qd4 Qd4 16.ed4+=) 14...Ne5?? (better 14...Nd4 15.ed4 Rfe8=) 15.Qc2 Ng5 (better 15...c5 16.Qe4 cd4 17.Qd4 Rfc8+–) 16.f3?? (better 16.f4+–) 16...Nc6 17.Rd1 Nd4 18.ed4 Rae8 19.Nc3 Bf5 (19...c6 20.c5=) 20.Qd2 Re7? (better 20...h6+=) 21.Nd5+– Re2 22.Qe2 Qd8 23.Qf2 c6 24.Ne3 White prepares the advance d5 24...Be6 (24...Bc8 25.d5 f6 26.dc6 bc6 27.Re2+–) 25.h4 Nf3 26.gf3 f5 (26...d5 27.c5+–) 27.f4 (27.d5 Bg8+–) 27...Re8 (27...d5 28.c5+–) 28.d5 Bd7 29.Ng2 Re4 (29...Qb8 30.Re2+–) 30.dc6 Bc6 31.b5 Be8 32.Rd4 Re6 33.Re2 Bf7 34.Re6 Be6 35.Qd2 Qb6 36.Kh2 Qc5 (36...Qc7 37.Rd6 Kf7 38.Qd4+–) 37.Ne3 (37.Rd6 Kf7+–) 37...Bf7 (37...Qa3 38.h5+–) 38.Rd6 Qa3 (38...Be8+–) 39.Qd4 Kh6 40.Nf5 Kh5 41.Qd1 (41.Qd1 Qf3 42.Qf3) 1–0. mpenga (2585) – workchess (2270), net–chess.com, 2016.

4.e3 Be6 5.Qc2 Nbd7 6.Bb2 Be7 7.Nf3 Bg4 8.Be2 0-0 9.Nc3 c6 10.0-0-0 (10.d4 Bf3 11.Bf3 ed4 12.ed4 Nb6=) 10...Rc8 11.Ng5 Be2 12.Ne2 Re8 13.h4 d5 14.f4 Bd6 15.fe5 Ne5 16.c5 Bb8 17.Nd4 h6 18.Rdf1? (18.Ngf3 a5+=) 18...g6?? (better is 18...hg5 19.hg5 Ne4-+) 19.Nh3 b6 20.Nf4 bc5 21.bc5 (21.Qc5? Ne4 22.Qa5 Qa5 23.ba5 Ng3-+) 21...a6 22.Bc3 (22.h5 g5 23.Nd3=) 22...Ba7 (22...Ne4!?-/+) 23.Nb3 Nfg4 24.Bd4 Qe7 25.Rh3 Rb8 26.Na5 Rb5 27.Ng6 fg6 28.Nc6 Qc7 29.Ne5+= Ne5 30.Be5 Re5? 31.Qg6+– Qg7 32.Qd6?? Rc5?? 33.Kd1= Qg4?? 34.Rff3+– Re8 35.Rhg3 1–0. combijack (1840) – thanchientranh (1750), gameknot.com, 2013.

4.e3 Bf5 5.Bb2 Be7 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 Bf5).

5.Nc3 Nbd7 6.d4 Be7 7.Nf3 0-0 8.Be2 Re8 9.0-0 Qc7 10.h3 Nf8 (10...a5 11.b5=) 11.Bd3 N6d7 12.Bb2 g6 13.Qd2 Ne6 14.Rac1 ed4 15.ed4 Ng7 16.Rfe1 Nf6 17.d5 Bf8 (17...Bf5 18.Rcd1+/–) 18.g4 Re1 19.Re1 Bd7 20.Qf4 Nge8 21.Ng5 (21.Ng5 Bc8 22.Nce4 Ne4 23.Be4+/–) 1–0. pierred (2775) – mgilbert (2100), net–chess.com, 2016.

5.Nc3 Be7 6.d4 0-0 7.Nf3 Nbd7 8.Be2 Re8 9.0-0 Bf8 10.Bb2 Qc7 11.h3 b6 12.Qc2 Bb7 13.Rfd1 e4 14.Nd2 d5 15.Qb3 White intends b5 15...Rac8 16.Rac1 Qd6 17.b5 c5 18.Nd5 Nd5 19.cd5 Bd5 20.Bc4 Bc4 21.Rc4 cd4 (better is 21...Qd5!?+=) 22.Rd4+– (22.ed4?! Qf4 23.Qc2 Rcd8=; 22.Bd4?! Rc4 23.Qc4 Qa3+=) 22...Qc7 23.Ne4 Nc5 24.Nc5 Qc5 25.Rd7 Qc4 (25...Re7+–) 26.Qc4 Rc4 27.Ra7 Rc2 28.Bd4 Bc5 (28...Rd8 29.Rb1 Rb8 30.a4+–) 29.Rc7 (better is 29.Bc5 Rc5 30.Rdd7 Rb5 31.Rf7 Rg5+–) 29...Ra2 (29...Rd8+–) 30.Bc5 bc5 31.b6 Ra3 32.b7 (32.Rc5?! Rb3 33.Rc6 Rb8+–) 32...Rb3 33.Rdd7 Rf8 34.Rc5 1–0. pierred (2775) – jlbaf (2430), net–chess.com, 2016.

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.a3 Be7).

4.Nc3 0-0 5.e3 Re8 6.Bb2 c5 7.b5 e4 (7...d6!?=+) 8.Qc2= Bd6 9.d3 ed3 (9...Be5 10.de4 Ne4 11.Ne4 Bb2 12.Qb2 Re4 13.Nf3+=) 10.Bd3+/- b6 11.Nf3 Bb7 12.Be2 (12.Nd5 Bd5 13.cd5 a6+/-) 12...Qe7 13.0-0 Ne4 14.Rad1 Nc3 15.Bc3 (15.Qc3 f6+=) 15...Qe6 (15...a6 16.ba6 Ra6 17.Qb2+=) 16.Ng5 Qg6?? (16...Qh6 17.f4 Re3 18.Rd6 Re2 19.Qe2 Qd6+-) 17.Qg6+- fg6 (17...Bh2 18.Kh2 hg6+- (18...fg6?? 19.Rd6+-)) 18.Rd6 h6 19.Nf3 Rf8 (19...Be4 20.Nd2 Bb7 21.Rg6+-) 20.Ne5 (20.Rg6 Rf7+-) 20...Rf6 21.Rf6 (21.Rfd1 Be4 22.Nd7 Rd6 23.Rd6 Nd7 24.Rd7 a6+-) 21...gf6 22.Ng6 d6 (22...a6 23.Ne7 Kf7 24.Nf5 ab5 25.Nd6 Ke7 26.Nb7 Ra3 27.Bb2+-) 23.Bf6 (23.Rd1 d5 24.Ne7 Kf8 25.Nd5 Bd5 26.Rd5 Ke7+-) 23...Nd7 (23...Kf7 24.Rd1 d5 25.Bb2 Kg6 26.cd5+-) 24.Bc3 (24.Ne7!? Kf8 25.Bh4 Be4+-) 24...Be4 25.Nf4 Re8 (25...a6 26.ba6 Ra6 27.Bb2+-) 26.Bf3 (26.Rd1 d5+-) 26...Bf5 (26...Bf3 27.gf3 Ne5 28.Be5 de5 29.Nd5+-) 27.g4 (27.Rd1 Ne5 28.Rd6 Nf3 29.gf3 h5+-) 27...Bh7 (27...Be4 28.Be2 Bc2 29.Rc1+-) 28.Bc6 Re7 29.Nd5 (better 29.Rd1 Ne5 30.Rd6 Nf7+-) 29...Rg7 (29...Kf8 30.Ne7 Ke7 31.e4+-) 30.Bd7 (better 30.Bg7!? Kg7 31.Bd7 Bd3+-) 30...Rd7 31.Nf6 (31.Nf6 Kf7 32.Nd7+-) 1-0. croixrouge51100 – jrui, Rated Classical game, lichess.org, 2014.

4.c5 d5 5.d3 c6 6.Nd2 0-0 7.Ndf3 b6 8.Bg5 bc5 9.bc5 h6 10.Bf6 Bf6 11.Ra2 Na6 12.e3 Nc5 13.d4 Nd7 14.de5 Be5 15.Ne5 Ne5 16.Be2 f5 17.Nf3 Nf3 18.Bf3 Be6 19.Rd2 f4 20.e4 d4 21.Rd4 Qa5 22.Rd2 Qa3 23.0-0 Bc4 24.Re1 Rae8 25.Qc2 Bb5 26.Be2 Qb4 27.Bb5 cb5 28.f3 a5 29.Ree2 Qe7 30.Qa2 Kh8 31.Rd5 Qb7 32.Qa5 Rc8 33.h3 Qf7 34.Qb5 Qg6 35.Rd1 Rfd8 36.Red2 Rf8 37.Qa5 Qg3 38.Rd8 Rfd8 39.Rd8 Rd8 40.Qd8 Kh7 41.Qd1 h5 42.Qd2 g5 43.e5 g4 44.Qd3 Kg7 45.hg4 hg4 46.Qf5 gf3 47.Qf6 Kh7 48.Qf5 Kh6 49.Qf6 Kh5 50.Qf5 Kh4 51.Qh7 Kg5 52.Qg7 Kf5 53.Qf6 Ke4 54.Qc6 Ke5 55.Qf3 Qe1 56.Kh2 Qh4 57.Kg1 Qe1 58.Qf1 Qf1 59.Kf1 Ke4 60.Kf2 Kf5 61.Kf3 Ke5 62.g3 fg3 63.Kg2 Time forfeit ½-½. Alco1 – jaimebm, Rated Blitz game, lichess.org, 2015.

4.e3 d5 5.Bb2 d4 6.ed4 ed4 7.d3 c5 8.bc5 Bc5 9.Nf3 0-0 10.Be2 Nc6 11.0-0 Bf5 12.Re1 Re8 13.Bf1 Qd7 14.Nbd2 Re1 15.Ne1 Re8 16.Nef3 b6 17.Nb3 Increasing the pressure on the isolated pawn on d4 17...Bg4 18.h3 Bf3 19.Qf3 h6 20.Bc1 Ne5 21.Qg3 Ng6 22.Bd2 Nh5 (22...Bd6 23.Qf3+=) 23.Qf3 Nf6 24.Bb4 Qd6 25.Qf5 Bb4 26.ab4 Qb4 27.Qb5 (27.Nd4? Qc3 28.Ra7 Qd4-+) 27...Qb5 (better is 27...Qc3-/+) 28.cb5+= Re5 29.Nd4 Rd5 30.Nc6 Rb5 31.Na7 Rb2 32.Nc6 Nd5 33.g3 Nc3 ½–½. combijack (1820) – romast (1700), gameknot.com, 2012.

5.Nc3 d5 6.cd6 Qd6-/+.

5.d3 b6 6.Be3 (6.Nf3 bc5 7.Ne5 Nc6 8.Nc6 dc6-/+) 6...Bb7 7.h3 Nd5 (better 7...bc5 8.bc5 Na6-+) 8.g4?? (better 8.Bd2-+) 8...Ne3 9.fe3 Bh1 10.d4 (10.Nf3 bc5 11.Kf2 Bf3 12.ef3 cb4 13.ab4 Bb4-+) 10...Bh4 11.Kd2 ed4 12.ed4 Qg5 13.Kc2 Be4 (better 13...Qe3!? 14.Nf3 Bf3 15.ef3-+) 14.Kb2 Bf2 (14...Qe3 15.Nc3 Bf6 16.Nf3 Bf3 17.ef3 Bd4 18.Qd3-+) 15.Nf3 (15.Nc3 Qf4 16.Ne4 Qe4-+) 15...Qf6 (better 15...Bf3 16.ef3 Nc6 17.d5 Bd4 18.Nc3 Qd5 19.Kc2-+) 16.Ne5 (16.g5 Qf4 17.Nbd2 Bf3 18.Nf3 Nc6-+) 16...Re8 (better 16...bc5 17.g5 Qg5 18.Nf3 Bf3 19.ef3 Bd4 20.Nc3-+) 17.e3 (17.Nc3 Qf4 18.Nc4 Nc6-+) 17...Be3 18.Nd2 (18.Nc3 Qf2 19.Qe2-+) 18...Bd4 19.Kb3 Qe5 20.Rc1 Qd5 (better 20...Bd5 21.Kc2 Bb2 22.Kb1 Ba3 23.Qc2 Bc1 24.Qc1-+) 21.Ka4 Be3 (better 21...a5 22.b5 Be3 23.h4-+) 22.Bc4 Qd2 23.Qf1 Bc6 24.b5 Bb5! 25.Kb5 (25.Kb5 Qa5 Mate attack; 25.Bb5 Qa5 Double attack (25...Qc1 Zwischenzug)) 25…Qa5 0-1. Paul593 - johniel (1905), ChessWorld.net, 2008.

5.e3 b6 6.d4 (better 6.Nc3!?-/+) 6...ed4-+ 7.Qd4 (7.Qf3 c6 8.ed4 bc5 9.dc5 Re8-+) 7...bc5 (7...Nc6 8.Qc4-+) 8.bc5 Na6 (8...Nc6 9.Qc4-+) 9.Bb2 (9.Ba6 Ba6 10.Nc3 Re8-+) 9...Bc5 (9...Nc5 10.Nd2-+) 10.Qc3 (10.Qf4 Be7 11.Nd2 Rb8-+) 10...Be7 (better 10...Rb8-+) 11.e4? (better 11.Nf3-+) 11...Nc5 12.e5 Nfe4 (12...d6 13.ef6 Bf6 14.Qc2 Re8 15.Kd1-+) 13.Qc2 Bb7 (13...d6 14.f3 Ng5 15.Nc3 de5 16.Rd1-+) 14.f3 (14.Nf3 Rb8-+) 14...Ng5 (better 14...Rb8 15.Nc3 Nc3 16.Bc3-+) 15.h4? (15.Bc4-+) 15...Nge6 16.Nd2 (16.Bc4 d5 17.ed6 cd6 18.Nc3 Bh4 19.Kf1-+) 16...Nf4 (16...Bh4!? 17.Kd1 h6 18.Bc4-+) 17.0-0-0? (better 17.Nh3 Nd5 18.Ng5-+) 17...Ba6 (better 17...Bc6 18.Ne4 Ba4-+) 18.Ba6-/+ Na6 19.g4 (19.Ne4 Ne6 20.f4=+) 19...Ne2?? (better 19...Nc5 20.Ne4 Ne4 21.Qe4 Ne6-+) 20.Ne2+- Bh4 (20...Rb8 21.Ne4 c6 22.Nd4+-) 21.Qc3 (21.Qc4 Rb8 22.Qa6 Qe7+-) 21...d6 (21...Rb8+-) 22.ed6 cd6 (22...Bf6 23.Qd3 Bb2 24.Kb2 h6 25.Qa6 Rb8 26.Kc2 Rb6+-) 23.Qg7 1-0. Paul593 - Poet361, ChessWorld.net, 2010.

5.e3 d5 6.Nf3 Nc6 7.b5-/+.

5.f3 b6 6.Nc3-+.

5.f3 Nc6 6.Bb2 Nd5 (6...d6 7.cd6 Qd6 8.Nc3-+) 7.e4 Nf4 8.d3 (8.g3 Ne6 9.Nc3 Ncd4-/+) 8...b6 (better 8...d6!? 9.g3 Ne6 10.cd6 Qd6 11.Nc3-+) 9.g3 Ne6 10.h4? (10.cb6 ab6 11.Ne2 f5-/+) 10...Bf6 (better 10...bc5!? 11.Nc3-+) 11.Ne2 (11.cb6 ab6 12.Nc3 Ne7-/+) 11...bc5 12.b5 Na5 (12...Rb8 13.Nbc3-+) 13.Bc3 c6 14.a4 c4 (better 14...d5-+) 15.f4? (better 15.Na3 d5 16.ed5 cd5 17.dc4-+) 15...ef4 16.Ra3 Bc3 (16...fg3!? 17.Ng3 d5 18.dc4-+) 17.Rc3 cb5 18.ab5 f3 19.Nc1 (19.Nf4 Bb7 20.Qf3 Nd4-+) 19...Nb3! 20.Qf3 (20.Nb3 cb3 Passed pawn) 20...Nbd4 21.Qe3 Nb3 (better 21...Qa5 22.Kf2 f5-+) 22.Rc4 (22.Qf3 Qa5 23.Qd1-+) 22...Qa5-/+ 23.Ke2 Nc1 24.Rc1 Qb5 25.g4? (25.Nd2 f5 26.ef5 Qf5-/+) 25...Bb7 (25...Qb2 26.Qd2 Qf6 27.Ke1-+) 26.Kd1? (better 26.Nd2-+) 26...Qb3 27.Ke2 Qb2 28.Kf3 (28.Qd2 Qe5 29.Kf2 Nd4-+) 28...Nd4 29.Kf4 (29.Kg3 f5! 30.gf5 Nf5 31.ef5 Rae8-+) 29...Rae8 (better 29...f5 30.gf5 Nf5-+) 30.g5 (30.Kg3 f5! 31.Qd2 Qb3-+) 30...Ne6 (better 30...f5 31.Qd2 fe4 32.Kg4 Qb3-+) 31.Kg4 (31.Kg3 f5 32.gf6 Rf6 33.Nc3-+) 31...Nd4 (better 31...f5 32.gf6 Rf6 33.Nc3 Rf1 34.Ne2 (worse 34.Rhf1 Qg2 35.Kf5 Qg6 36.Ke5 d6 37.Kd6 Nd4 38.Rf6 Qf6 39.Kc5 Qb6 40.Kc4 Rc8) 34...Rh1 35.Rh1-+) 32.h5?? (32.Kf4 f5 33.Nc3 fe4 34.Kg4 ed3 35.Nd1-+) 32...Nc2 (better 32...f5 33.gf6 Rf6-+) 33.Qd2 Rc8 34.g6?? (34.Bh3 f5! 35.gf6 Rf6-+) 34...h6 (34...Ne3 35.Qe3 Rc1 36.gh7 Kh7 37.Nd2 f5 38.Kh4-+) 35.Bg2 (35.gf7 Rf7 36.Be2 d5-+) 35...Ne3! 36.Qe3 (36.Kf3 Rc2 37.Rc2 Nc2-+) 36...Qg2 37.Kf5?? (37.Qg3 f5! 38.Kh4-+) 37...fg6 (37...Rce8 38.Qg3 Qg3 39.gf7 Rf7) 38.Ke5 Rce8 (38...Qb2 39.Rc3 Rc3 40.Nc3 Qc3 41.Qd4 d6 42.Kd6 Qc6 43.Ke5 Qf6) 39.Kd6 Qb2 40.Nc3 (40.Qc5 Qf6 41.Kc7 Rc8 42.Kb7 Rc5 43.Ka7 Qc6 44.Rc5 Ra8) 40...Qb4 41.Kc7 (41.Qc5 Rf6 42.Kd7 Bc6 43.Qc6 Qe7) 41...Rc8 (41...Bc6 42.hg6 Rc8) 42.Kd7 Rf7 43.Ke6 Qe7 (43...Re8) 0-1. Paul593 – RDTC, ChessWorld.net, 2008.

5.f3 d6 6.Qc2 (6.cd6 Qd6 7.Nc3 a5-+) 6...dc5 7.b5 g6 8.g4 Nbd7 (8...a6 9.Nc3-+) 9.h4 a6 10.e4 (10.ba6 Ra6 11.Nc3 c4-+) 10...ab5 11.Bb5 c6 12.Bc4 (12.Be2 b5 13.h5 gh5-+) 12...b5 13.Be2 h6 (better 13...c4 14.Bb2 Nc5 15.Be5-+) 14.d3 c4 (better 14...h5 15.g5 Ne8 16.Nh3-+) 15.Qd1? (15.dc4 Qa5 16.Kf1-+) 15...cd3 (15...Qa5 16.Kf1 c3 17.Bh6-+) 16.Qd3 Nc5 (better 16...Qa5 17.Qd2 Bb4 18.ab4 Qa1 19.Nc3-+) 17.Qc3 (17.Qd8 Rd8 (worse 17...Bd8 18.Bh6 Ba5 19.Kf2-+) 18.Bh6 b4-+) 17...Na4 (17...Nfe4 18.fe4 Ne4 19.Qd3 Bh4 20.Kf1 Ng3 21.Kg2 Qd3 22.Bd3 Nh1 23.Kh1 Bg4 24.Be4-+) 18.Qc6 (18.Qd2 Qb6 19.Nh3 Rd8-+) 18...Bd7 (18...Qd4 19.Qa8 Qa1 20.Bh6 Qb1 21.Kf2 Bc5 22.Be3 Be3 23.Ke3-+) 19.Qc2 Rc8 20.Qd2 (20.Qd1 Qb6 21.Kf1 Rfd8 22.Bh6 Bg4-+) 20...Nc5 (better 20...Qc7 21.g5 Qc1 22.Bd1 Qd2 23.Nd2 hg5 24.Ba4 ba4 25.hg5-+) 21.Bb2 Nb3 22.Qh6 Na1 23.g5 (23.Ba1 b4 24.Qd2 ba3-+) 23...Nh7 (better 23...Nc2 24.Kf1 Ne3 25.Kf2 Qb6-+) 24.Be5 f6 (24...Nc2!? 25.Kf2 f6 26.h5 Qb6 27.Kg3-+) 25.Qg6 Kh8 26.Bf4 (26.Bc3 Nc2 27.Kf1 Ne3 28.Kf2 Qb6-+) 26...Nc2 27.Kf2 Bc5 28.Kg2 Ne3 29.Be3 Be3 (better 29...Be8 30.Qf5 Be3-+) 30.Bd3 (30.e5 fe5 31.Bd3-+) 30...Rg8 31.Qf7 Be8 (31...Be8 32.Qd5 Bg5 33.hg5 Rg5 34.Qg5 fg5-+) 0-1. Paul593 - Poet361, ChessWorld.net, 2009.

4.Nc3 Be6 5.Nf3 Bd6 6.e3 h6 7.Be2 0-0 8.Nb5 c6 9.Nd6 Qd6 10.Bb2 Nbd7 11.0-0 Nh7 12.Qd2 f6 13.Nh4 Ng5 14.f4 Nf7?? (better is 14...Nh7+=) 15.f5+– Bf5 16.Nf5 (16.Nf5 Qc7 17.c4+–) 1–0. Fritz 11 – rookbynight, 2013.

4.Nd2 a5 5.b5-/+.

4.Nd2 Bd7 5.Bb2+= d4 6.Rc1 (6.Ngf3!? Bd6 7.Nc4=) 6...a5-/+ 7.ba5 Ra5 8.Nc4 Rb5 9.a4?? (9.c3 Nc6+=) 9...Rb4 (better is 9...Rb2 10.Nf3 Bb4 11.Nfd2 Ra2-+) 10.Ba3-/+ Ra4 11.Bf8 Kf8 12.Ne5+= Be6 13.Ngf3 Nbd7 14.Nd7 Qd7= 15.g3 g6 16.Bg2 c6 17.0-0 Kg7 18.Ng5 Bd5 19.f3 Qf5 20.Ne4 Re8?? 21.Nc5?? Ra7 22.Rb1 Bf3 23.Nb7 Be2+= 24.Qe2? Re2-+ 25.Rf5 gf5 26.Bc6 Rc2 27.Bg2 Raa2 28.Bf3 Ng4 29.Bg4 Rh2 30.Bf5-/+ Rag2 31.Kf1 Rf2 32.Ke1?? Rf5-+ 33.Nd6 Re5 34.Ne4 Rh1 35.Kd2 Rb1 36.Ke2 f5 37.Kf3 fe4 38.de4 Re1 39.g4 R1e4 40.g5 Re3 41.Kf4 d3 42.g6 hg6 43.Kg4 d2 44.Kf4 d1Q (44...d1R 45.Kg4 Rd4) ½–½. 4washt – fuszer44, playok.com, 2012. (=1.a3 Nf6 2.b4 e5)

4.e3 a5 5.b5-/+.

4.e3 Bf5 5.h3 (5.Nf3 Nbd7=+) 5...h6 6.Bb2 Bd6 7.Nf3 Nbd7 8.c4 0-0 (better 8...c6!?=) 9.c5+= Be7 10.Ne5 Ne5 11.Be5 c6 12.Nc3 b6 13.Na4 Nd7 14.Bd4 bc5 15.bc5 Rb8 16.Nc3 (better 16.Qd2!?+=) 16...Qa5 c5 seems the pivot of the position 17.Qa4 Qc7 18.Be2 Rb7 19.0-0 Rfb8 20.Rab1 Nc5 21.Bc5 Bc5 22.Rb7 Rb7 23.d4 Bd6 24.Rc1 Qe7 The isolani on a3 becomes a target (24...Qb6 25.Rd1=) 25.Ra1 (better 25.Qc6!? Ba3 26.Nd5+/-) 25...Qc7 26.Rc1 Bd7 27.Nd5?? Exerts pressure on the backward pawn (better 27.Nb5 Bh2 28.Kh1=) 27...Qd8?? (better 27...cd5 28.Rc7 Rb1 (28...Ba4?? 29.Rb7 a5 30.Bf3+-) 29.Qd1 Rd1 30.Bd1 Bc7-+) 28.Ba6?? (better 28.Qa6 Qb8 29.Nb4+/-) 28...Rb2?? (better 28...cd5 29.Qd1 Rb2-+) 29.Nc3+= (29.Nc3 c5 30.Qc4 cd4 31.Qd4 Ba3 32.Bc4+=) 1-0. pillsbury – rar, net-chess.com, 2020.

4.Nf3 Bd6 =+.

4.g3 a5 5.ba5 Bc5 6.Bd2 0-0 7.e3 Nc6 8.h3 Na5 9.Bg2 Nc6 10.Ne2 Be6 11.Nec3 (11.Qc1 Ra7-/+) 11...Qd7 12.g4 d4 Black terminates the opponent with strong threats 13.Ne4 Ne4 14.Be4 f5 15.gf5 Bf5 16.Bf5 Qf5 Do you see the mate threat? 17.Qe2 e4 18.de4 Qe4 19.Qc4 Kh8 20.Rh2?? (20.Rf1 Qe5 21.f4-+) 20...Bd6 21.f4 (21.Qd3 Qd3 22.cd3 Bh2-+) 21...Bf4 22.Re2 (22.Qd3 Qd3 23.cd3 Bh2 24.e4-+) 22...Qh1 23.Kf2 Be5 (23...Be5 24.Qf7 Rf7) 0-1. Delboy Smith (1775) - Dekcol (2190), ChessWorld.net, 2013.

4.g3 b6 5.Bg2=+ Bb7 6.e3 (6.c4 c5 7.Qa4 Nbd7=) 6...g6 (6...Bd6!?=+) 7.Nf3= Qe7 8.h3 (8.Bb2 Nbd7=) 8...Bg7 9.Bb2 0-0 (better 9...e4!? 10.Nfd2 0-0=) 10.Be5 Nc6 11.d4 (11.Bc3!? b5 12.0-0+/-) 11...Ne5= 12.de5 (12.Ne5!? Ne4 13.0-0=) 12...Nd7=+ 13.c3 Ne5 14.Nd4 (14.Ne5 Qe5 15.0-0 c6=+) 14...Nc4 (better 14...c5 15.bc5 bc5-/+) 15.Qc2?? (better 15.0-0=+) 15...Ne3! 16.fe3 Qe3 (better 16...Bd4!? 17.e4 Bg7 18.0-0 de4 19.Qf2-+) 17.Ne2-/+ Rae8 18.Kf1 (18.Qb2 Qg3 19.Kf1-+) 18...Ba6 19.Ra2 Re5 20.Qd2 (20.g4-+) 20...Qg3 21.Qe1 (21.Qd5 Rd5 22.Bd5-+) 21…Rf5 (21...Rf5 22.Kg1 Qe1 23.Kh2 Be5 24.Nf4 Bf4) 0-1. Delboy Smith (1785) - The_Knight2000 (1835), ChessWorld.net, 2016.

4.Bg5 Bf5 5.Nc3 (5.Nf3 h6 6.Bh4 Bd6=+) 5...a5 (5...c5 6.e4 de4 7.de4 Qd1 8.Rd1=) 6.e4 de4 7.de4 Qd1 8.Rd1 ab4? (better is 8...Bg4!? 9.Be2 Be2 10.Nge2 ab4 11.Bf6 gf6=) 9.Bf6+– gf6 10.Bc4?? (10.Nd5 Bd6 11.ef5 ba3 12.Nf6 Ke7 13.Nd5 Kf8 14.Ra1+=) 10...bc3-+ (10...Ra3 11.Nd5 Be6 12.Nc7 Ke7 13.Nd5 Bd5 14.ed5=+) 11.Nf3?? (11...Be4 12.Bd5 Bc2 13.Rc1 Ra3 14.Bb7-+; better is 11.ef5 Rg8 12.g3-+). aligarjon – Stoot, ChessWorld.net, 2005.

4.Bg5 h6 5.Bh4 =+.

4.h3 Nbd7 5.c4 d4 6.e4 de3 7.Be3 g6 (7...a5 8.Qa4+=) 8.Nc3 Bg7 9.Rc1 0-0 10.Nf3 a5 11.b5 b6 12.a4 Bb7 13.Be2 e4 14.de4 Ne4 15.Ne4 Be4 16.0-0 (16.c5 Qe7 17.cb6 cb6=) 16...Qe7 (16...Bb2!?+=) 17.Bg5 f6 18.Bf4 Nc5 19.Re1 Rad8 20.Nd2 f5 21.Bf1 (21.f3 Ne6 22.Be3 f4-/+) 21...g5 22.Be3 f4?? (better is 22...Bb2-/+) 23.Bc5+– Qc5 24.Re4 (24.Ne4?! Rd1 25.Nc5 Rc1 26.Rc1 bc5+=) 24...f3 (24...Qb4 25.Re2 f3 26.gf3 h6+–) 25.g3?? (better is 25.Qe1!? fg2 26.Bg2 Qa3+–) 25...Bd4 (25...Qd6!? 26.Rc2 Bd4 27.Rd4 Qd4+–) 26.Qe1+– Qf5? (26...Bf2 27.Qf2 Qf2 28.Kf2 Rd2 29.Ke3+–) 27.g4 Qc5 28.Nb3 Qa3 29.Nd4 Rc8 30.Qd1 Rf6 31.c5! bc5 32.Qb3 Qb3 33.Nb3 h6 34.Nc5 Rd8 35.Ne6 Re8 36.Bc4 Kh7 37.Bd5 Re7 38.Nc7 Re4 39.Be4 Kg7 40.Rc6 Rf7 41.Ne6 1–0. pillsbury (2105) – budgie (2295), net–chess.com, 2013.

5.c4 c6 6.g3 Be6 7.Bg2 0-0 8.Bb2 Nbd7 9.Ngf3 d4 10.0-0 Ne8 11.e3 de3 12.fe3 f5 13.c5 Bc7 14.a4 a5 15.Qc2 ab4 16.Nc4 e4 17.de4 fe4 18.Nfe5 Ne5 19.Ne5 Rf1 20.Rf1 Nf6 21.Nc4? Bd5?? 22.Bf6= gf6 23.Rf6?? Qf6-+ (24.Be4 Rf8 25.Bd5 cd5-+) 0–1. taroak – ian371, HCL–T093 playchess.de, 2003.

5.e4=+ 0-0 6.Ngf3 Bg4 (6...a5 7.b5=+) 7.Be2 (7.h3 Bc8=+) 7...de4 (7...a5 8.b5=+) 8.de4 Nc6 (8...a5 9.b5=) 9.0-0 a6 (9...Qd7 10.c4=) 10.h3 (10.c4 Qd7=) 10...Bh5 (10...Bf3 11.Bf3 a5 12.b5=) 11.c4 b6 (11...Bf3 12.Bf3 a5=) 12.Ng5 (12.Qc2!?=) 12...Bg6=+ 13.Nb3 (13.Qc2 Nd4 14.Qd1 c5-/+ (< 14...Ne2 15.Qe2 c5 16.Rb1=+)) 13...Ne4 (13...h6 14.c5 bc5 15.bc5-+) 14.Ne4 (14.Bf3 Ng5 15.Bc6 Ne6 16.Ba8 Qa8=) 14...Be4 15.Bb2 (15.Re1 Qf6-/+) 15...Qg5 (15...Qh4 16.Nd2 Bf5 17.Bf3-/+) 16.Bf3 Bf3 (16...Qf4 17.Be4 Qe4 18.c5 bc5 19.bc5-/+) 17.Qf3=+ Na7 18.Rae1 Rfe8 19.c5+= bc5 20.bc5 Bc5?? 21.Nc5 Nb5 22.Re5! Re5 23.Qa8 Re8 24.Qe8# 1–0. carlosfandangos – khani9, ChessWorld.net, 2007.

5.e4=+ a5 6.b5 =+.

5.Bb2 0-0 6.h3 (6.Nf3 Qe7=+) 6...Re8-/+ 7.Nf3 Bf5 (7...d4 8.ed4 ed4 9.Be2-/+) 8.Be2 (8.c4 c6=+) 8...Nbd7 (8...a5 9.0-0=+) 9.0-0 (9.c4 c6=+) 9...a5 10.ba5 (10.b5 a4=+) 10...c5 (10...Ra5 11.Bc3 Ra4 12.Bb2-/+) 11.Nh4 (11.c4 Ra5 (< 11...Qa5 12.cd5 Nb6 13.Bc3+=) 12.cd5 Bg6+=) 11...Be6-/+ 12.Nf3 Qa5 13.Bc3 (13.c4 Qb6 14.Qc2 dc4 15.dc4 Bf5-/+) 13...Qc7 14.Re1 Rac8 (14...b5 15.d4 ed4 16.ed4-/+) 15.Bf1 (15.Ng5 Bf5-/+) 15...d4 16.Bb2 (16.Bd2 Qb6 17.a4 c4 18.dc4 Qb2=) 16...Qb6 (16...Ra8 17.c4-/+) 17.Bc1 h6 (17...Ra8 18.Ng5-/+) 18.c4=+ e4 (better is 18...dc3 19.Nc3 Qc6=+) 19.Nbd2?? (better is 19.de4 de3 20.Re3+=) 19...ef3-+ 20.Nf3 (20.Rb1 Qc7 21.Qf3 Rb8-+) 20...Ne5 21.ed4 Nf3 22.Qf3 cd4 23.Bh6 Bb8 24.Bg5-/+ Nh7 25.Bh4 Bd7 26.Rab1 Qg6 27.Re8=+ Re8 28.Kh1?? Bc6-+ 29.Qg4 Qg4 30.hg4 g5 31.Bg3 Bg3 32.fg3 Nf6 33.Kh2 Ng4 34.Kg1 Re3 35.c5 Rg3 36.Rb4 Ne3 37.Rd4 Nf1 38.Kf1 Kg7 39.a4 f5 40.a5 Bb5 41.Rd7 Bd7 (42.d4 Bc6-+) 0–1. pillsbury (1950) – taxista (2075), net–chess.com, 2007.

5.Bb2 a5 6.b5 =+.

5.c4 dc4 6.dc4 0-0 =+.

5.h3 0-0 6.Bb2 a6 7.c4 A) 7...Nc6 8.Nf3 (8.c5 Be7 9.Nf3 d4 10.ed4 ed4 11.Be2 Re8+=; 8.Be2 dc4 9.dc4 e4 10.Nd2 Bf5 11.c5 Be5+=) 8...dc4 9.dc4 e4 10.Nd4 Ne5 11.c5 Be7=; B) 7...dc4 8.dc4 Nc6 9.Nc3 Re8 10.c5 Be7 11.Qf3 Be6=; C) 7...d4 8.c5 (8.Nf3 de3 9.c5 ef2 10.Kf2 Be7 11.Ne5 Ne4+=) 8...Be7 9.Nf3 Nc6 10.ed4 ed4 11.Be2 Re8+=.

5.h3 0-0 6.Bb2 a6 7.Be2 Nbd7 (7...a5 8.b5 c6 9.Nf3 Nbd7 10.c4 cb5 11.cb5 Qb6+=) 8.Nf3 a5 9.b5 c6 10.c4 cb5 11.cb5 Qb6 +=.

5.h3 0-0 6.Bb2 a6 7.Nf3 Nc6 (7...Qe7 8.Nbd2 (8.Be2 a5 9.b5 Bd7 10.Nc3 c5 11.bc6 Bc6+=; 8.c4 dc4 9.dc4 Rd8 10.Nbd2 c5 11.bc5 Bc7+=) 8...a5 9.c4 c6 10.c5 Bc7 11.Be2 Bf5=; 7...Nbd7 8.Be2 (8.c4 dc4 9.dc4 b6 10.Nc3 e4 11.Nd2 Bb7+=) 8...a5 9.b5 c6 10.c4 cb5 11.cb5 Qb6+=; 7...e4 8.Nd4 (8.de4 de4 9.Nfd2 Nc6 10.Nc4 Be7 11.Qd8 Rd8+=; 8.Nfd2 Nc6 9.Be2 a5 10.b5 Ne5 11.0-0 Bf5+=) 8...b6 9.de4 Ne4 10.Nc3 c5 11.bc5 bc5+=) 8.c4 (8.Be2 Re8 9.0-0 Qe7 10.c4 dc4 11.dc4 e4+=; 8.Nbd2 Re8 9.Be2 b5 10.0-0 Bd7 11.c3 a5+=) 8...e4 (8...dc4 9.dc4 e4 10.Nd4 Nd4 (10...Ne5 11.c5 Be7=) 11.Qd4= b6+=) 9.de4 (better is 9.cd5!? Nd5 10.de4+/– Nb6 11.e5 Be7+/–) 9...de4+= 10.Nd4 Nd4 (10...Ne5 11.c5 Be7=) 11.Qd4 b6 12.Nc3 Re8 13.Rd1 Bb7 14.Be2 Qe7 15.0-0 Be5 16.Qd2 Rad8 17.Qc2 Rd7 18.f4 (18.Rd7!? Qd7 19.Rd1=) 18...ef3+= 19.Bf3 Rd1 20.Qd1? (better is 20.Nd1 Bb2 21.Qb2 Bf3 22.Rf3+=) 20...Bc3-+ 21.Bc3 Qe3 22.Kh1 Qc3 23.Bb7 Qa3 24.Qd2 h6 25.Bc6 Rf8 26.Rb1 Qg3 27.Ra1 g5 (27...Ng4!? 28.hg4 Qh4 29.Kg1 Qf6 30.Ra6 Qc6-+) 28.Ra6+= g4 29.hg4 (29.Ra1 gh3 30.Qh6 Qe5+=) 29...Ng4 30.Kg1 Qh2 31.Kf1 Ne5 32.Bd5 (32.Qd5 Qf4 33.Ke2 Qg4 (33...Qc4?! 34.Qc4 Nc4 35.Ra7+=) 34.Kf1 Nc4-+) 32...Re8 (32...c6 33.Be4 Re8 34.Qe2 Nc4 35.Qg4 Kf8 36.Kf2-+) 33.Qe3 Qh1 34.Qg1 (34.Ke2 Qh5 35.Bf3 Qg6-+) 34...Qh5 35.Ra7?? (better is 35.g4 Qg5 36.Qf2-+) 35...Qd1 (35...Nd3 36.g4 Qh3 37.Qg2 Re1) 36.Kf2 Nd3 (36...Qd4 37.Kf1 Qd3 38.Ke1 Ng4 39.Be4 Re4 40.Qe3 Re3) 37.Kg3-+ Qg1 38.Rc7 Qf2 39.Kh2 (39.Kh3 Qf5 40.g4 Re3 41.Kh2 Qf4 42.Kg2 Qg4 43.Kf1 Re1) 39...Qh4 40.Kg1 Re1 0–1. pillsbury (2180) – felippe (2235), net–chess.com, 2014.

4.c3 d5 5.h3 (5.b5 Na5 6.de5 Ne4=) 5...Bf5 (5...Bd6 6.b5 Ne7 7.de5 Be5 8.Nf3=+) 6.g4 (6.b5 Na5=) 6...Be4 7.f3 Bb1 8.Rb1 ed4 9.g5 Nh5 10.Qb3? (better 10.b5!? Ne7 11.cd4-/+) 10...Ng3 11.Rh2 Nf1 (11...dc3 12.Qc3 Bd6 13.f4 Nf1 14.Kf1-+) 12.Kf1 dc3 13.Qc3 d4 14.Qc5?? (better 14.Qd3-/+) 14...Bc5-+ 15.bc5 b6 16.cb6 ab6 17.Rb5 (17.Ke1 0-0-+) 17...Qd6 (17...0-0 18.Kg2-+) 18.Rf2 d3 (18...Ra5!? 19.Rb1-+) 19.e4 d2! 20.Rd2 (20.Bd2 Qd3 Double attack (20...Ra3 Deflection); 20.Rd2 Qe6 Combination) 20...Qg3 (20...Qe6 21.Rbd5-+) 21.Bb2 (21.Rg2 Qh4-+) 21...Qg5 (better 21...0-0-+) 22.Rg5+- 1-0. souleater99 – training, Rated Classical game, lichess.org, 2014.

4.d5 Nb8=.

4.d5 Nd4 5.e4 (5.Bb2!?=) 5...Ne4=+ 6.Nf3 (6.c3 Qh4 7.Ra2 Nf5=) 6...c5 (6...Qf6-/+) 7.Ne5? (7.Nd4!? ed4 8.Bd3=) 7...Qf6 (better 7...Qe7!? 8.c3 Nc3 (8...Qe5?! 9.cd4 cd4 10.Qe2-/+) 9.Nc3 Qe5 10.Be3 Nf5-+) 8.Ng4-/+ Qf5 (8...Qe7 9.Be3 h5 10.bc5 Nf5-+) 9.Bd3= d6? (9...Qd5 10.0-0 Ne6 11.Bb2 cb4 12.ab4+=) 10.0-0?? (10.f3 Qh5 11.Be4 f5+-) 10...Qd5?? (better 10...Qg4 11.Qg4 Bg4 12.Be4 Ne2 13.Kh1 Nc1 14.Rc1 Be7=) 11.Re1 (11.Be4 Bg4 12.Qg4 Qe6+-) 11...Bf5? (11...f5 12.c3 a5 13.bc5 dc5+-) 12.Ne3 Qe6 (12...Qe5 13.Nf5 d5 14.Be4 de4 15.Nd4 cd4+-) 13.Be4 (better 13.Nf5 Qf5 14.Be4+-) 13...Be4+/- 14.c3?? (14.f3 Bf3 15.gf3 0-0-0+-) 14...Nc6?? (14...Nb3 15.Nd2 Na1 16.Ne4 0-0-0-/+ (16...Qe4? 17.Nc2 Qe1 18.Qe1 Be7 19.Na1+-)) 15.Nd2 (better 15.f3 d5 16.fe4 de4 17.Nd2+-) 15...Be7? (better 15...0-0-0 16.b5 Nb8+=) 16.Nd5?? (better 16.Ne4 Qe4 17.Nd5+-) 16...0-0?? (better 16...Qd5 17.Re4 0-0=+) 17.Nc7 (better 17.Ne4!? cb4 18.ab4 Qd7+-) 17...Qg6? (17...Qd7 18.Na8 Bf5+/-) 18.Ne4 Rac8 19.Nd5 Rfe8 20.Ne7 (better 20.b5 Ne5 21.f4+-) 20...Ne7?? (20...Re7 21.Ng3 Re1 22.Qe1 Ne5+-) 21.Nd6 (worse 21.Qd6 cb4 22.ab4 f5+-) 21...Red8 (21...Rcd8 22.Bf4 Kf8 23.bc5+-) 22.Re7 (better 22.Nc8 Rc8 23.Re7+-) 22...Rd6 23.Qe2 f6 (23...Re6 24.Re6 fe6 25.c4+-) 24.Bf4 Rd3 (24...Rdd8 25.Rb7 Re8 26.Qc4 Kh8 27.bc5+-) 25.Rd1 (25.Qe6 Kf8 26.Qc8 Ke7 27.Re1 Re3 28.Re3 Qe4 29.Re4 Kf7 30.Qe8) 25...Rcd8 (25...Rd1 26.Qd1 cb4 27.ab4 b6+-) 26.Rb7 (better 26.Rd3 Rf8 27.Qd1+-) 26...Rd1 27.Qd1 (27.Qf1 Rf1 28.Kf1 Qd3 29.Ke1 Qd1) 27…Rd1 0-1. hrom – guevara, Rated Classical game, lichess.org, 2014. (=1.a3 A00: Irregular Openings 1...e5 2.b4 Nf6)

4.d5 Ne7 5.Nc3=.

4.de5 Ne5=+ 5.Bf4 (5.Nf3 Nf3 6.ef3 Bd6=+) 5...Bd6 (5...Ng6 6.Bg3=+) 6.e4 (better is 6.e3=) 6...Ne4 (better is 6...0-0!? 7.Nc3 Re8=+) 7.Qd4+/– Nf6? (better is 7...Nf2!? 8.Qf2 0-0+=) 8.Be5+– 0-0 9.Bf6 gf6 10.Qg4 Kh8 11.Bd3 Qe7 12.Ne2 b6 13.Qf5 Bb4 14.c3 Kg7 15.Qh7# 1–0. Trkn – daem101, itsyourturn.com, 2001.

4.Qd4 a6 5.Nc3 (5.Bg5 Be7=+) 5...Nc6 6.Qd3 Be7 (6...d6 7.Nf3=) 7.Bg5 (7.e4 d6=) 7...0-0 (7...Ne5 8.Qd2=+) 8.e3 (8.Nf3 h6 9.Bc1 d5=+) 8...d6 (8...Ne5 9.Qd1=+) 9.0-0-0 (9.Nf3 h6 10.Bh4 a5=) 9...Be6 10.Nf3 (10.Qd2=+) 10...Ne5 (10...Ng4!? 11.Be7 Qe7=+) 11.Ne5= de5 12.f4 (12.Bf6 Bf6 13.Qe4 Qe7=) 12...ef4=+ 13.ef4 (13.Bf4 Qc8 14.Ne4 Rd8 15.Nf6 Bf6-+) 13...Ng4 (13...Qe8!?=+) 14.Qe4 Qe8 15.Bd3 (< 15.Qb7 Nf2 16.Bd3 Bg5 17.fg5 a5-+) 15...g6 16.Be7 (16.Qb7 Nf2 17.Bh6 c5=) 16...Qe7 17.Rd2 (17.Rdf1 Qf6 18.Kb2 Rfd8=+) 17...c6 18.h3= Nf6 19.Qe5 Rfe8 20.g4 a5=+ 21.g5 Nd7–/+ 22.Qd4 ab4 23.ab4 Ra1-+ 24.Nb1 Rea8 25.Rhh2 c5 26.bc5 Nc5 27.Bb5 Bf5 28.Bc4 b6 29.Rhe2–/+ Qc7 30.Bd5=+ R8a7?? 31.Re8 1–0. marus2 – LCD, internet, 2001.

4.Qd4 Be7 5.Nc3 (5.Nf3 0-0=+) 5...Nc6 (5...d5 6.e3=+) 6.Qf4 (6.Qd3 d5=+) 6...0-0 7.b5 Nb8 (7...Bd6 8.Qf3 Nd4 9.Qd3=+) 8.e4= Bd6 9.Qf5 g6 (9...Re8 10.Nf3=) 10.Qg5 Re8 11.Nf3 Be7 12.Qf4 (12.Qe3 d5 13.e5 Bd6=+) 12...Nh5 (12...Ne4!? 13.Ne4 d5=+) 13.Qe3= b6 (13...Bf6 14.Bb2=) 14.Bc4+= Bc5 (14...Bf6 15.0-0+=) 15.Qh6 (better is 15.Qd3 Bb7 16.0-0+/–) 15...Bf8? (better is 15...Qf6 16.Bb2 a6+=) 16.Bf7!+– Kf7?? (16...Kh8 17.Qg5 Be7+–) 17.Ng5 Kf6 (17...Qg5 18.Qg5 Bb7+–) 18.Nd5 Ke5 19.Bb2 Kd6 20.Nf7 Kc5 21.Qe3 Kc4 (21...Kb5 22.Nd8 Rd8+–) 22.Qd3 Kc5 23.Bd4 1–0. marus1 – crs, internet, 2001.

4.Nf3 d5 5.Bf4 Ne4 6.Qd4 Nc6 7.Qe3 a5 8.Nbd2 Qf6 9.Rc1 ab4 10.Ne4 de4 11.ab4 Ra1 12.Qe4 Be7 13.Bg5 -/+.

5.Qb2 Bd6 6.Nf3 0-0 7.e3 Qe7 8.Bd3 Ne5 9.Ne5 Be5 10.Nc3 a5 11.Rb1 Ng4 (better is 11...ab4 12.ab4 d5–/+) 12.ba5? (12.Nd5 Qh4 13.g3–/+) 12...Qf6-+ (12...Bh2 13.Be2 f5 14.Bg4 fg4 15.Rh2+/–; 12...Nh2?! 13.Nd5 Qg5 14.Qb4=+; 12...Ra5?! 13.Bd2 d6 14.Qb4=+).

5.Qb2 Bd6 6.Nf3 0-0 7.e3 Qe7 8.Bd3 Ne5 9.Ne5 Be5 10.Nc3 Ng4 11.Bf5?? (11.Nd5 Qe6 12.Nc7 Bc7 13.h3-+) 11...Qf6-+ (11...Nh2 12.Bh7 Kh7 13.g3 Bg3 14.fg3+–).

5.Qd1 d6 6.Bb2 Be7 7.Ra2 0-0 8.Bf6 Bf6 (8...gf6?! 9.e3=) 9.c3 Be6 10.e3?? (better is 10.Ra1-/+) 10...Ba2-+ 11.Be2 Bb1 12.Qb1 Bc3 (12...Bc3 13.Kd1 Qf6-+) 0–1. Reinfeld – IRONMAIDEN, playchess.de, 2006.

5.Qd2 a5 6.Nf3 Ne4 7.Qd3 d5 8.Nc3 ab4 9.Qd5 Nc3 10.Qg5 Qd1 0-1. thring – JohnMika, Rated Blitz game, lichess.org.

5.Qe3 Ne7 6.Bb2 Ng4 7.Qe4 d6 8.f3 f5 9.Qf4 Nd5 10.Qd2 Nge3 11.Bd4 Nf1 12.Kf1 Be6 13.f4 Qh4 14.g3 Qe7 15.h4 0-0-0 16.Qd3 Nb6 17.Bb6 cb6 18.Nf3 h6 19.h5 Qf7 20.Nc3 d5 21.Nb5 Kb8 22.Nbd4 g5 23.Qe3 Bc8 24.Qe5 Ka8 25.Qh8 gf4 26.gf4 1-0. ro74cky - chelsey_00, Rated Classical game, lichess.org, 2014.

5.Bb2 Be7 (5...c5 6.bc5 Nc6 7.Qf4=+) 6.Nd2 a6 (6...a5 7.b5=+) 7.g3 (7.e3 Nc6 8.Qf4 Rg8=) 7...Nc6 (7...0-0 8.Bg2=+) 8.Qc3 (8.Qd3 Bg4=+) 8...Bf5 (8...d4 9.Qd3 Qd5 10.Ngf3=+) 9.Ngf3 0-0 10.h3 Qd6 (10...Na7 11.Bg2=+) 11.Rd1 (11.g4 Bg6=+) 11...Ne4?? (better 11...Ne8=+) 12.Qg7 1-0. souleater99 - Sky5 (1730), Rated Classical game, lichess.org, 2014.

5.Nf3 =+.

4.ba5 Nc6 5.d4 ed4 6.ed4 Na5 7.Bb5 c6 8.Bd3 d5 9.Nf3 Bg4 10.0-0 Be7 11.Re1 0-0 12.Nbd2 Qd6 13.a4 b6 14.Ba3 c5 15.c4 Rfe8 16.cd5 Nd5 17.Qc2 Rac8? (better 17...g6!? 18.Ne4 Qc7=) 18.Bh7+– Kh8 19.dc5 bc5 20.Bf5 Bf5 21.Qf5 Bf6? (better 21...Kg8!?+–) 22.Ne4+– Qf4 23.Qh5 Qh6 (23...Kg8 24.g3 Qc7 25.Qd5 Ba1 26.Ra1 Qb7 27.Qb7 Nb7+–) 24.Qd5 Ba1 25.Nfg5 (worse 25.Ra1 Rcd8 26.Qf5 Qh7 27.Qh7 Kh7 28.Nc5 Kg6+–) 25...Qg6 (25...Qc6 26.Qf5 Qg6 27.Nf7 Kh7 28.Nfg5 Kh6+–) 26.Nf7 Kh7 (26...Kg8 27.Nfg5 Kh8+–) 27.Neg5 Qg5 28.Ng5 Kh8 29.Re4 (29.Re4 Re4 30.Qe4 g6 31.Qe7 Bg7 32.Bb2 Rg8 33.Qd7 Bb2 34.Qh7) 1–0. capablancaven – michael_r (1680), gameknot.com, 2011.

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 a5).

4.b5 b6 5.Bb2= Bd6 6.c4 0-0 7.Nf3 Re8 8.Be2 c6 (8...e4 9.Nd4=) 9.0-0+= Bc7 10.d4 e4 11.Nfd2 (11.Ne5!?+=) 11...cb5=+ 12.cb5 d5 13.Nc3 Bf5 (13...Qd6 14.g3=+) 14.Re1 Qd6 15.Nf1 Nbd7 16.Rc1 Rac8 17.Qb3 Nf8 18.f4 (18.Rc2 Ng6=) 18...Red8 (18...ef3 19.Bf3 Be6 20.Qd1=+) 19.h3 (19.Ng3 Be6+=) 19...h5 20.Bh5?? (better 20.Ng3 Bg6 21.Na4=) 20...Nh5-+ 21.g4 Bg6 (21...Qg6 22.Nd5 Qe6 23.gf5 Qd5 24.Qd5 Rd5 25.a4 Rf5 26.Rc6-+) 22.gh5 Bh5 23.Rc2 Bg6 (23...Bf3 24.Rec1 Qg6 25.Kh2-+) 24.Rg2 (better 24.Na4!?-/+) 24...Bf5-+ 25.Rg3 Nh7 (25...Ng6 26.Qd1-+) 26.Ne2 (26.Nh2 Qe6 27.Kf2 Bd6-+) 26...Nf6 27.Kf2 (27.Rc1 Qe6-+) 27...g6 28.h4 Qe7 29.Nh2 (29.Nd2 Kg7 30.a4 Rh8-+) 29...Kg7 30.Rg5 (30.Rh1 Rh8 31.Nf1 Ng4 32.Ke1 Be6-+) 30...Nh7 31.Rh1 (31.Nf1 Ng5 32.hg5 Bg4-+) 31...Ng5 32.hg5 Be6 33.Nf1 Rh8 34.Rg1 (34.Rh8 Rh8 35.Neg3 Rh4-+) 34...Bd6 35.a4 (35.Nc3 Qc7 36.Ke1 Be7-+) 35...Bb4 36.Bc3 (36.Rg2 Qc7 37.Kg1 Bh3-+) 36...Bc3 37.Nc3 (37.f5 Bf5 38.Nc3 Be6-+) 37...Qc7 38.Ne2 (38.f5 Qc3 39.Qc3 Rc3 40.fe6 fe6-+) 38...Qc2 (better 38...Qc4 39.Qc4 Rc4 40.f5 gf5 41.Kg2-+) 39.Qa3 (39.Qc2 Rc2 40.f5 Bf5 41.Ke1-+) 39...Qc7 (better 39...Rh3 40.Qa1 Rf3 41.Ke1 Bh3-+) 40.Ke1?? (40.Qb3 Qc4 41.Qc4 Rc4 42.Nfg3 Rh2 43.Rg2 Rg2 44.Kg2 Ra4 45.Kf2-+) 40...Rhd8 (40...Qc4 41.Qd6-+) 41.Rg3 (41.Nfg3 Bg4 42.Rh1 Rh8 43.Rh8 Rh8-+ (worse 43...Kh8 44.Qb3 Be6 45.Kd2-+)) 41...Qd6 42.Qb2 (42.Qd6 Rd6 43.Nd2 Rdd8-+) 42...Rc4 43.Nd2 (43.Rg2 Ra4 44.Nc3 Rb4-+) 43...Ra4 44.Ne4 (44.Nc3 Rb4 45.Qa1 Bd7-+) 44...de4 45.d5 Kg8 46.de6 Qe6 47.Nc3 (47.Nd4 Qc4 48.Nc6-+) 47...Rb4 48.Qh2 (48.Qa1-+) 48...Qd6 (48...Qb3 49.Qh8 Kh8 50.Kf2 Rd2 51.Ke1 Qc3 52.Rh3 Kg7 53.Rh7 Kh7 54.Kf1 Rb1) 49.Ne2 (49.Rh3 Kf8 50.Rh8 Ke7 51.Rd8 Kd8 52.Qh8 Ke7 53.Qa8-+) 49...Qd1 50.Kf2 Qe2! (50...Qe2 51.Ke2 Rb2 52.Ke1 Rh2 53.f5 Rc8 54.Rg2 Rg2 55.Kd1 gf5 56.g6 fg6 57.Ke1 Rc1) 0–1. combijack (1885) – chocboy (1965), gameknot.com, 2017.

4.b5 c5 5.c4 b6 (5...d5 6.cd5 Nd5 7.Bb2=) 6.Qc2+= Bb7 7.Nf3 (7.Nc3!?+=) 7...e4=+ 8.Ng5 h6 9.Nh3 Be7 (9...d5!? 10.cd5 Bd5=+) 10.Nc3= 0-0 11.Bb2 d5 12.cd5 Bd5 13.Nf4 Bb7 14.Bc4 g5? (better 14...Kh8=) 15.Ng6+– Re8 (15...Bd6 16.Nf8 Bf8 17.Rd1+–) 16.Ne5 (16.Qb3 Rf8+–) 16...Bd6?? (better 16...Rf8+–) 17.Nf7 (17.Nf7 Qe7 18.Nd6 Kh7 19.Ne8 Qe8 20.f3+–) 1–0. combijack (1795) – fsilisque (1640), gameknot.com, 2018.

4.b5 c6 5.c4 Be7 last book move 6.Nc3 0-0 7.Qc2 d5 8.cd5 Nd5 9.Nf3 Nc3 10.dc3 Nd7 11.Be2 Nf6 12.c4 c5 (better 12...e4!? 13.Nd4 c5=+) 13.Ne5+= Bd6 14.Nf3 b6 15.Bb2 Bb7 16.h4 h6 17.0-0-0 (17.Rd1!? Re8 18.Ne5 Bg2 19.Nc6+=) 17...Ne4= 18.Bd3 f5 (18...Qe7 19.h5=) 19.Rh3 (19.Be4 fe4 20.Ne5 Qc7+=) 19...Qc7 (19...Qe7 20.h5 Rad8 21.Nh4+=) 20.Ne1 (20.h5!?+=) 20...Be5 21.f3 Bb2 22.Qb2 Ng3 23.Qf2 f4 24.ef4 Qf4 25.Qd2 Qe5 26.Qb2 (26.Nc2 Nh5 27.Bf1 Nf4=+) 26...Qf4 27.Kb1 (better 27.Qd2!? Qc7 28.Nc2=+) 27...Bc8-/+ 28.Qc2?? (better 28.Rh2-/+) 28...Bh3-+ 29.gh3 Nf5 (better 29...Rad8!? 30.h5-+) 30.Be4 Nd4 31.Qg2 Rad8 32.Qg6 Qf6 33.Qh7 (33.Qf6 Rf6 34.Rd3 Kf7-+) 33...Kf7 34.Bd5? (34.Nd3 Ne2 35.Re1 Nc3 36.Kc2-+) 34...Ke7 (better 34...Rd5 35.cd5 Nb5-+) 35.Qe4 (35.Nd3 Rd7 36.Rg1=) 35...Kd6-+ 36.Nd3 Rde8 (36...Rfe8 37.Qf4 Qf4 38.Nf4-+) 37.Qg4 Kc7 38.Qg3 Kc8 39.Qg4 Qf5?? (better 39...Nf5 40.h5 Re7-/+) 40.Qg7+– Qd7 41.Qh6 Qc7 42.Nc5 (better 42.f4+–) 42...Qc5?? (42...bc5 43.h5=) 43.Rd4 Qd4?? (better 43...Rf3! 44.Be6 Kb8=) 44.Qc6+– Kd8 45.Qd6 Kc8 46.Bb7!! Kb7 47.Qd4 Re1 48.Kc2 Rfe8 (48...Rc8+–) 49.Qd7 Kb8 50.Qd6 Ka7 (50...Kc8 51.Qc6 Kd8 52.Qb6 Kd7 53.Qc6 Ke7 54.b6 Re2 55.Kb3+–) 51.Qc7 (better 51.c5 Ka8 52.Qb6 R1e7+–) 51...Ka8 52.Qb6 (better 52.c5 R1e7 53.Qb6 Rb7 54.Qa5 Kb8+–) 52...a4 (52...R1e2 53.Kb3 R2e6 54.Qc7+–) 53.Qc6 Kb8 54.b6 R8e7 55.Qa4 (55.c5 R1e6 56.Qa4 Re2 57.Kd3 R2e3 58.Kc4 R3e6+–) 55…R7e2 1–0. combijack (1870) – ciano999 (1740), gameknot.com, 2016.

4.b5 d5 5.c4 d4 6.ed4 ed4 7.d3 Nbd7 8.g3 (8.Nf3 Bc5=+) 8...Bc5 (8...Nc5 9.Nf3-+) 9.Qe2? (9.Nf3 0-0 10.Be2 Re8=+) 9...Qe7?? (9...Be7 10.Nf3 Nc5 11.Bg2-/+) 10.Nd2? (better 10.Nf3=+) 10...Ne5-+ 11.Ne4?? (better 11.Kd1 Bf5 12.Ngf3-+) 11...Nd3! 12.Qd3 Ne4 (12...Qe4?! 13.Qe4 Ne4 14.f3-+) 13.Be2 Bf5 14.Qf3 (14.Kf1 Bg6 15.f4 Nf2 16.Kf2 Bd3 17.Bd3 0-0-+) 14...Bg6 15.Kf1 d3! 16.Bd3 (16.Bd3 Nf2 Double attack (16...Bf2 Discovered attack; 16...Nf2 Decoy); 16.Qd3 Nf2 Double attack (16...Bf2 Discovered attack; 16...Bf2 Deflection; 16...Nf2 Decoy)) 16...Nf2 (better 16...0-0-0!? 17.b6 Nd2 18.Bd2 Bd3 19.Ne2-+) 17.Bg6 hg6 (worse 17...fg6 18.Ra2 Rf8 19.Qb7 Nh1 20.Kg2-+) 18.Qb7 (18.Ra2 Ne4 (18...Nh1?! 19.Re2 0-0-0 20.Re7 Rh2 21.Rf7 Rf2 22.Ke1 Rf3 23.Nf3-/+) 19.Kg2 0-0-0-+) 18...0-0 19.Bf4 (19.Bb2 Rab8 20.Qd5 Nh1-+) 19...Rfe8 (better 19...Qf6 20.Ra2 Nh1 21.Qh1-+) 20.Qf3 (20.Kg2 g5 21.Bd2-+) 20...Nh1 (better 20...g5 21.Bd2 Nh1 22.Qf5-+) 21.Qh1 (21.Nh3 Qf6 22.Ra2 Qe6-+) 21...Qf6 (21...g5 22.Qf3 gf4 23.Qf4-+) 22.Rd1 (22.Ra2 Rad8 23.Qf3 g5-+) 22...g5 23.Ne2 (23.Qc6 Qc6 24.bc6 gf4-+) 23...gf4 24.gf4 (24.Qf3 Rad8 25.Rd8 Qd8 26.Qd5-+) 24...Rad8 25.Rd8 Qa1 (better 25...Rd8 26.Qc6 Qf5 27.Qf3-+) 26.Kg2 Qh1 27.Kh1 Rd8 0–1. combijack (1850) – chocboy (1880), gameknot.com, 2016.

4.b5 g6 5.Bb2= d6 6.c4 Bg7 7.d4 ed4 8.Bd4 0-0 9.Bd3 Nbd7 10.h3 Nc5 11.Bc2 Ne6 12.Bb2 d5 13.cd5 Nd5 14.Bg7 Kg7 15.Nf3 Qf6 16.Ra2 Rd8 17.Nd4? (better is 17.Qc1=) 17...Ndf4! 18.Ne6? (18.ef4 Rd4 Double attack (18...Rd4 Discovered attack; 18...Rd4 Deflection; 18...Rd4 Decoy)) 18...Be6 (18...Be6 19.Qf3 Ba2 20.ef4 Bb1 21.Bb1 Re8 22.Kf1 Qb2-+; 18...Qe6?! 19.Qd8 Qa2 20.ef4 Qc2 21.0-0=) 0–1. varin123 – zeolito (1660), internet, 2013.

5.ab4 Ra1 6.Ba1 Bb4 7.Be5 Nc6 8.c3 Be7 (8...Ne5 9.cb4 Qe7 10.b5+=) 9.Bf4 (9.Bf6 Bf6 10.d4 d5=) 9...d6 10.h3 Be6 11.Bb5 0-0 12.Nf3 Nd5 13.Bg3 Nb6 14.0-0 Bc4 15.Bc4 Nc4 16.Qb3 Nb6 17.d4 Bf6 (17...d5 18.Nbd2=) 18.Re1 Na5 19.Qb4 Nc6 ½–½. grahamtrue (2260) – jlbaf (2415), net–chess.com, 2016.

5.ab4 Ra1 6.Ba1 Bb4 7.Be5 Nc6 8.Bc3 0-0 =.

5.ab4 Ra1 6.Ba1 Bb4 7.Be5 Nc6 8.Nf3 Ne5+= 9.Ne5 d6 10.Nd3 0-0?? (better is 10...Ba5+=) 11.Nb4+– 1–0. pierred (2775) – jlbaf (2415), net–chess.com, 2016.

5.ab4 Ra1 6.Ba1 Bb4 7.Be5 d6 8.Bd4 c5 9.Bb2 Qb6 10.Bf6+/– gf6 11.Qf3 f5 12.c3 Ba5 13.Bd3 Nc6 14.Bf5 Bf5 15.Qf5 Ne7 16.Qc2 Rg8 17.g3 Qc6 18.f3 b5 19.Qh7 Rf8 20.h4 b4 21.h5 bc3 22.dc3 Nd5 23.Qd3 (23...c4 24.Qe4 Ne7 25.Qc6 Nc6 26.Ne2+–) 1–0. pierred – kannaa_999, Yahoo, 2005.

5.ab4 Ra1 6.Ba1 Qe7 =+.

5.ab4 Nc6?? 6.Ra8+– Bb4 7.Bb5 0-0 8.Bc6 dc6 9.Be5 Qd5 10.Bf6 gf6 11.Rc8! Rc8 12.Qg4 (12...Qg5 13.Qc8 Bf8 14.Nf3+–) 1–0. pierred – kannaa_999, Yahoo, 2005.

4.Bb2 b5 5.Be5+/– Bb7 6.Nf3 d6 7.Bb2 Be7 8.Be2 a5 (8...0-0 9.0-0+/–) 9.0-0 (9.Bb5 c6 10.Be2 ab4 11.ab4 Ra1 12.Ba1 Qb6+–) 9...c6+/– 10.d3 ab4 11.ab4 Ra1 12.Ba1 Na6 13.c3 h6 14.Bb2 c5 15.bc5 dc5 16.d4 (16.Qb3 Nc7+/–) 16...c4 17.Qc2 0-0 18.Nbd2 Qc7 19.e4 Qf4 20.e5 Ne4 21.Ne4 Be4 22.Qc1 Qf5 23.Qe3 (23.Ba3!? Ba3 24.Qa3+/–) 23...Nc7= 24.Nd2 Bd3 (24...Bg2 25.Kg2 Nd5 26.Qe4 Qg5 27.Qg4 Qd2 28.Bc1 Nf4 29.Qf4 Qe2 30.Qf3=) 25.Bd3+= cd3 (25...Qd3 26.Qd3 cd3 27.Rd1+/–) 26.Qe4 (better is 26.Rd1+–) 26...Qe4+= 27.Ne4 Nd5 28.Rd1 Nf4? (better is 28...Ra8+=) 29.g3+– Nh3 (better is 29...Nd5+–) 30.Kg2 Ng5 31.Ng5 Bg5 32.f4 Be7 33.Rd3 Rc8 34.d5 Bc5 35.d6 Kf8 (35...b4 36.f5+–) 36.Kf3 Rd8 (36...Bb6 37.Ba3 Ra8 38.Bb4+–) 37.Rd5 Bg1 38.Kg2 Be3 39.Rb5 Ke8 40.Rb7 (40.c4 g6+–) 40...Rd7 41.Rb8 Rd8 42.Rd8 (42.Rb3 Ra8+–) 42...Kd8 43.c4 g6 (43...Bd2 44.c5 Kd7 45.Kf3+–) 44.Ba3 (44.Kf3 Bg1+–) 44...Kd7 45.Kf3 Bd4 (45...Bg1 46.Bc1+–) 46.Ke4 Bg1 47.h3 (47.Kd5 Bb6+–) 47...h5 48.g4 White plans f5 48...hg4 49.hg4 Ba7 (49...Bh2 50.f5 gf5 51.gf5+–) 50.Kd5 Be3 51.f5 White prepares e6 51...gf5 52.gf5 Ba7 53.e6 fe6 54.fe6 Kd8 55.c5 (55.Kc6 Bg1 56.e7 Ke8 57.d7 Kf7 58.e8Q Kg7 59.Qh5 Bb6 60.Bb2 Kg8 61.Qg6 Kf8 62.Qe8) 55...Bb8 56.c6 White prepares d7 56...Ke8 (56...Bc7 57.e7 Ke8 58.dc7 Kf7 59.c8Q Kg6 60.e8Q Kg5 61.Qe5 Kg6 62.Qcf5 Kh6 63.Qef6) 57.d7 Kd8 58.e7 Kc7 59.Bd6 1–0. jlbaf (2415) – grahamtrue (2260), net–chess.com, 2016.

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 a6).

4.Bb2 Bd6 5.c4 (5.Nf3 e4 6.Nh4 Bf8=) 5...Nc6 6.Ne2 0-0 7.d4 ed4 8.Nd4 Nd4 9.Bd4 (9.Qd4 Re8=) 9...Qe7 10.Nc3 Be5 11.Be5 Qe5 12.Qd4 Qd4 13.ed4 c6 14.0-0-0 (14.Bd3 d5 15.c5 Ne4 16.Be4 de4+=) 14...d6 15.Bd3 Re8 16.Rhe1 Bd7 (16...Be6 17.h3+=) 17.a4 (17.Kc2 d5+=) 17...b6 (17...Ng4 18.f3 Nf2 19.Re8 Re8 20.Rd2=) 18.Kc2 (18.Ne4 Ne4 19.Be4 Rad8+=) 18...Ng4 19.Re8 Re8 20.Rd2 Nh2 (20...Nf6 21.f3+=) 21.Ne4 (21.c5 bc5 22.dc5 dc5 23.bc5+=) 21...Bf5 (better is 21...d5!? 22.Nd6 Re1+=) 22.Nd6+– Bd3 23.Kd3 Rd8 24.c5 b5? (better is 24...Ng4+–) 25.d5 (25.ab5 ab5 26.Ra2 Ng4+–) 25...cd5 (25...Ng4 26.Kd4 cd5 27.ab5 ab5 28.Rc2+–) 26.ab5 ab5 27.Kd4 Ng4 28.Kd5 Rb8 (28...Kf8+–) 29.c6 Nf6 (29...Rf8 30.c7+–) 30.Kc5 Kf8 (30...h6+–) 31.c7 Ne4 (31...Ra8 32.Ra2!! Rc8 33.Nc8 Ne8+–) 32.Ne4 Rc8 33.Rd8 (33...Ke7 34.Rc8+–) 1–0. mrkt – WODZU1, zagraj.pl, 2006.

4.c4 Nc6 5.Bb2 d6 6.Qc2 Be7 7.d3 0-0 8.Nf3 h6 9.Nbd2 b6 10.Be2 Bb7 11.b5 (11.0-0!?=) 11...ab5=+ 12.cb5 Nb8 Black intends e4 (12...Na5 13.0-0=+) 13.Rc1= c5 14.0-0 Qc7 15.d4 e4 16.Ne1 (16.Nh4 g6=) 16...Nbd7=+ 17.dc5 Nc5 18.g3 (better 18.f3=+) 18...Bc8?? (better 18...Rfc8!?-/+) 19.Ng2 (19.Ne4 Bf5 20.Nf6 Bf6 21.Qf5 Bb2+=) 19...Qd7 (19...Qb7 20.Nf4=) 20.Nf4 g5 (better 20...d5!?=) 21.Bf6+– Bf6 22.Nd5 Bd8 23.Ne4 Bb7?? (better 23...Qf5 24.Nef6! Bf6 25.Qf5 Bf5 26.Nf6 Kg7+=) 24.Nef6+– (24.Nef6 Bf6 25.Nf6 Kg7 26.Nd7 Nd7 27.Qc7+–; 24.Nc5?! dc5 25.Bc4 Qe6+– (25...Bd5? 26.Rfd1 Kg7 27.Rd5+–)) 1–0. dbinc007 – northcoaster, gameknot.com, 2018.

4.c4 Be7 5.Bb2 d6 6.d3 0-0 7.Qc2 h6 8.Nf3 Bg4 9.Nbd2 Nc6 10.b5 (better 10.Be2=) 10...Nh7?? (better 10...ab5 11.cb5 Na5=+) 11.bc6+– bc6 12.Be2 Bf3 (12...Nf6 13.h3 Bh5 14.Rb1+–) 13.Bf3 (13.gf3?! Ng5+–) 13...Qd7 14.Qa4 Rab8 15.Bc6 Qf5 16.Be4 Qe6 17.Bh7 (17.Rb1!? Ng5+–) 17...Kh7 18.Bc3 Qg6 19.0-0-0 (19.Ke2!? Qg4 20.Nf3 e4 21.de4 Qe4+–) 19...Qd3 20.Ba1?? (better 20.Qc2 Qg6 21.Qg6 Kg6 22.Kc2+–) 20...d5+– 21.cd5?? (better 21.Bb2 Rb2 22.Kb2 Rb8 23.Nb3 Qc4 24.Qc4 dc4 25.Kc3 Rb3 26.Kc4+=) 21...Ba3-+ 22.Bb2 (22.Qa3 Qa3 23.Kc2-+) 22…Bb2 0–1. dbinc007 – texknight, gameknot.com, 2018.

4.Nf3 Nc6 5.Bb2 d6 6.d3 Bg4 7.Be2 Na7 8.h3 Bh5 9.c4 c6 10.e4 Be7 11.g4 (11.0-0 a5+=) 11...Bg6= 12.Nh4 Nd7 13.Ng6 fg6 14.Qd2 (14.d4 ed4 15.Bd4 Bf6=) 14...Bg5 15.Qc2 Bh4 16.Rf1 0-0 Exerts pressure on the backward pawn 17.Nd2 Rf4 (17...c5 18.Nf3=) 18.Nf3+= Qf6 19.Nh4 (19.g5!? Qf7 20.Nh4 Rh4 21.Bg4+–) 19...Qh4= 20.Bd1 (20.Bc1 Rf7=) 20...Qh3=+ 21.Qe2 Raf8 22.Bb3 (22.Bc1 Rf3=+) 22...Kh8 (22...c5 23.g5-/+) 23.Bc1 (23.Bd1 Rf3-/+) 23...Rg4 24.Be3 Nc8 25.Kd2 Rg2 26.Rh1 Rh2 27.Rh2 Qh2 28.Rf1 Nf6 29.f4 (29.Qe1 Qg2-/+) 29...Qh3 (29...Qe2 30.Ke2 Nh5 31.Rg1 Nf4 32.Bf4 ef4 33.Kf3-+) 30.Kc2 (30.Rf3 Qg4-/+) 30...Ng4 (better 30...Nh5!?-+) 31.Bd2-/+ ef4 32.Rf4 Rf4 33.Bf4 h6 34.e5 (34.c5 dc5 35.bc5 g5=+) 34...de5 (34...g5 35.ed6 gf4 36.Qe8 Kh7 37.Qe4 g6 38.Qf4 Ne3 39.Kc3-/+) 35.c5 (35.Be5 Kh7-/+) 35...Kh7 (35...Qh5 36.Kb2-+) 36.Be5-/+ Ne5 37.Qe5 Qf5 (37...Qg2!? 38.Kc1 Qg1 39.Kb2 Qf2 40.Kb1 Qf6-/+) 38.Qe8= Qf2 39.Kc3 (better 39.Kb1 Qf1 40.Kc2 Qf2 41.Kb1 Qg1 42.Kc2 Qf2=) 39...Qf6-/+ 40.Kc2 Ne7 41.Qd7 (41.Qb8 Qf2 42.Kd1 Qd4-+) 41...Qf2 (41...Nf5 42.Bc4 Ne3 43.Kb3-+) 42.Kc3 Qe1 43.Kc2 (43.Kb2 Qe5 44.Kb1 Nd5 45.Bd5 Qd5 (45...cd5?! 46.Qb7 a5 47.Qc6=) 46.Qb7 Qd3 47.Kb2 Qe2 48.Kb3 Qb5 49.Qb5 ab5=+ (49...cb5?? 50.c6+–)) 43...Qe2 (43...Nf5 44.Qd8 Ne3 45.Kb2 Qd2 46.Ka1 Nc2 47.Bc2 Qc2 48.Qe7-+) 44.Kc3 Qe5 45.Kc2 Nd5 46.Bd5 Qd5 (46...cd5?! 47.Qb7 Qe2 48.Kc3 Qe1 49.Kb3 Qd1 50.Kc3 Qc1 51.Kb3 Qd1 52.Kc3 Qa1 53.Kb3 Qd1=) 47.Qb7 Qa2 48.Kc3 Qa3 49.Kd2 a5 50.Qc6 Qb4 51.Ke3 (better 51.Kc2-+) 51...a4 52.Qb6 Qb3 (better 52...Qe1 53.Kf3 a3-+) 53.Qb3+– ab3 54.Kd2 h5 55.c6 h4 56.c7 b2 57.Kc2 h3 (57...g5 58.c8Q Kg6 59.Qc6 Kh5 60.d4+–) 58.c8Q b1Q 59.Kb1 h2 60.Qh3 (60.Qh3 Kg8 61.Qh2+–) 1–0. ctessman (2270) – grahamtrue (2260), net–chess.com, 2016.

4.h3 Nc6 5.g4 d5 6.Nc3 (6.Bg2 Be6=+) 6...Ng8 (6...d4 7.ed4 ed4 8.Na4-/+) 7.Bb2 f5 8.f3 (8.Bg2 Nf6 9.gf5 Bf5=+) 8...fg4 (better 8...Qh4 9.Ke2 fg4-/+) 9.fg4?? (9.hg4 Be7=) 9...Nf6?? (better 9...Qh4 10.Ke2 Bg4 11.hg4 Qh1-+) 10.Bg2 e4 (10...h6!?=+) 11.d3= ed3 12.Qd3 Increases the pressure on d5 12...Be6 (better 12...Ne5 13.Qd4 Nc4=) 13.b5?? (better 13.g5!? Ne5 14.Qd4+=) 13...ab5 (13...Ne5 14.Qd4 Nc4 15.g5=+) 14.Qb5 (14.Nb5 Ra4 15.0-0-0=) 14...Rb8?? (better 14...Ra6 15.Rb1 Ba3 16.Ba3 Ra3-/+) 15.Nge2 (15.g5 Nh5 16.Nd5 Bd6+=) 15...Be7 (15...Bd6 A) 16.Nd5? Nd5 17.Bg7 Rg8-+ (17...Ne3 18.Bc6 bc6 19.Qc6 Kf7 20.Bh8 Qh8 21.Rc1-+); B) 16.g5 Nd7 17.Bd5+=) 16.Nd4 (16.Nf4!? Bf7 17.g5+/-) 16...Bd7= 17.Nd5?? (better 17.Qe2=) 17...Nd4-+ 18.Bd4?? (better 18.Qd3 Ne6 19.0-0-+) 18...Bb5 19.Rd1 (19.Rb1 Ba6 20.Nb4 Bc4-+) 19...0-0 (19...Nd5 20.Bg7 Bh4 21.Kd2 Ne3 22.Ke3 Qg5 23.Ke4 Qg7 24.Rd5 Qe7 25.Re5 Bc6 26.Kd4 Rd8 27.Kc3 Qe5 28.Kb3 Qb5 29.Ka2 Bf6 30.Re1 Kf7 31.Re7 Ke7 32.c3 Rd2 33.Ka1 Bc3) 20.Nf4 Qc8 1-0. souleater99 – maximulicka, Rated Classical game, lichess.org, 2014.

5.c4 d5 6.b5 ab5 7.cb5 Na5 8.Be5 Be6 9.Nf3 b6 (9...Bd6!? 10.d4 0-0=) 10.d4+= Ne4 11.Bd3 f6 12.Bg3 Be7 (12...Nc4 13.Qb3 Kf7 14.Nc3 Ng3 15.hg3+=) 13.Be4 (better 13.Nbd2!? f5 14.Qc2+–) 13...de4= 14.Nfd2 0-0 15.0-0 h6 (15...f5 16.Nc3=) 16.Ne4 (better 16.Nc3 f5 17.Qe2+=) 16...Bd5 (better 16...Nb3 17.Ra2 Nc5=) 17.Nbc3 Bb3 18.Qb1 Bc4 19.Rc1 (better 19.Rd1+–) 19...Nb3=+ 20.a4 f5 21.Na2 (better 21.Bc7 Qc7 22.Nd5=+) 21...fe4?? (better 21...Nc1 22.Qc1 A) 22...fe4? 23.Qc4 Kh7 24.Nc3+– (worse 24.Bc7 Qc8+–); B) 22...Ba2 23.Ra2 fe4 24.Qc4 Kh8-+) 22.Rc4+– Nd2 (better 22...Na1 23.Nc3 Bd6 24.Qa1 Qf6 25.Ne4 Qe6+–) 23.Qe4?? (23.Qc2 Nc4 24.Qc4 Kh7+–) 23...Nc4 (better 23...Ne4 24.Nc3 Nc3 25.Rc3 Bh4-+) 24.Qe6+– Kh8 25.Qc4 Bd6 26.Nc3 Bg3 27.hg3 (27.fg3?! Qf6 28.Qf1 Qg6+–) 27...Qf6 28.Rf1 c6?? (better 28...Rac8+–) 29.bc6 Rac8 (29...Kh7 30.c7 Rfc8 31.d5+–) 30.d5 Qf7 31.f3 (31.Nb5 Rfd8 32.e4 Qf6+–) 31...Qg6 (31...Kh7+–) 32.Kf2 (32.Ne4 Rfd8 33.Rc1 Kh7+–) 32...Rfe8?? (32...Qc2 33.Kg1 Qg6+–) 33.e4+– Qf7 (33...Qg5 34.f4 Qg6 35.Rb1+–) 34.Re1 Re7 (34...Re5 35.Qd4 Ree8 36.Rb1+–) 35.Nb5 Rc6 (35...Qg6+–) 36.Qc6 1–0. dbinc007 – saphir, gameknot.com, 2017.

5.c4 d5 6.cd5 Nd5 7.Qc2 Be6 8.Nf3 Bd6 9.b5 ab5 10.Bb5 0-0 11.Bc6 bc6 12.Ne5 c5 (12...Qg5 13.Nf3 Qh5 14.Nc3=+) 13.0-0= f6 14.Nf3 Rb8 15.d4 Ne7 (better 15...Qd7!?=) 16.dc5+– Bc5 17.Bf6 Rf6 (better 17...Bd6 18.Be7 Qe7+–) 18.Nbd2?? (better 18.Qc5 Rf5 19.Qc2 Rf3 20.gf3+–) 18...Bd6 19.Rfd1 (19.Rfb1 Nd5-+) 19...Qe8 (19...Rf5 20.Rab1 Rc5 21.Qe4-+) 20.Nd4 (20.Rab1 Rb1 21.Rb1 Rg6-/+) 20...Bd7 (20...Qh5 21.N2f3 Bd5 22.e4-+) 21.a4? (better 21.Ne4!? Rg6 22.Rab1-/+) 21...Qh5 22.g3?? (22.f4 Rh6 23.N2f3-+) 22...Rbf8 (better 22...Rf2! 23.Qc4 Kh8 24.Kf2 Qh2 25.Kf3 Nc6 26.Qc6 Bc6 27.Nc6 Qg3 28.Ke2 Qg2 29.Kd3 Qc6-+) 23.f4 (better 23.Ne4 Rh6 24.h4-+) 23...Bc5 (23...Nd5 24.Nc4 c5 25.Nd6 cd4 26.Nc4-+) 24.Nf1? (better 24.Ne4 Rc6 25.Qb3 Qf7 26.Qf7 Kf7 27.a5=+) 24...Bg4 (24...Kh8 25.a5-+) 25.Rd2 Bb6 (25...Rd8 26.a5 Bb4 27.a6 Bd2 28.Nd2-/+) 26.h4? (better 26.a5 Bd4 27.Rd4-/+) 26...Nf5-+ 27.Nf5 (27.a5 Bd4 28.ed4 Bf3 29.Qb3 Kh8-+) 27...Rf5 (27...Qf5?! 28.a5 Ra8 29.Qc4 Qe6 30.Qc3-+) 28.Kh2 (28.Ra3-+) 28...g5 (better 28...Re8-+) 29.Qc4 R8f7 (better 29...Qf7 30.Qf7 Kf7 31.hg5 Ra5-+) 30.Rd5?? (30.Rd8 Kg7 31.Qc3 R7f6 32.Rd7 Kg6 33.Qb3-+) 30...gh4-+ 31.Rf5 (31.Rd8 Kg7 32.Qc3 R5f6-+) 31...Qf5 (better 31...Bf5 32.Kg2 h3 33.Kg1-+) 32.gh4 (32.a5 Ba5 33.Qc6-+) 32...Kg7 (32...Bf3 33.Rc1 Qg4 34.Rc2-+) 33.Ng3?? (33.Qc3 Kf8 34.a5 Ba7 35.Qh8 Ke7-+) 33...Qd7 (better 33...Qf6 34.Nh5 Bh5 35.Rg1 Bg6-+) 34.Nf1? (34.Qc3 Kg8 35.Rg1 Qe6-+ (35...Qa4?! 36.Nh5 Qd7 37.Qe5=)) 34...Be6 (34...Qe7!? 35.Kg3 Be6 36.Qe4-+) 35.Qc3 Kg8 (35...Kh6 36.a5 Ba7 37.a6-+) 36.Nd2 (36.a5 Qd5 37.Ng3 Qf3-+) 36...Qe7 (better 36...Rg7 37.Ne4 Qe7-+) 37.a5?? (37.Rg1 Rg7 38.Nf3 Rg1 39.Kg1 Qg7 40.Qg7 Kg7 41.Kf2-+) 37...Bc5 (better 37...Qh4 38.Kg2 Rf4 39.ef4 Qf2 40.Kh1 Bd5 41.Nf3 Bf3 42.Qf3 Qf3 43.Kh2 Qf4 44.Kh3-+) 38.a6?? (better 38.Rg1 Rg7 39.Rg7 Qg7 40.Qc5+–) 38...Bd5 (38...Qh4 39.Kg2 Qh3 40.Kf2 Qh2 41.Kf1 Bh3 42.Ke1 Bg4 43.Qd3 Qg3 44.Kf1 Rf4 45.Nf3 Qf3 46.Kg1 Qf2 47.Kh1 Bf3) 39.Nf1?? (39.Rg1 Rg7 40.Rg7 Qg7 41.Qg7 Kg7 42.e4-+) 39...Qh4 40.Kg1 Rg7 (40...Rf4 41.Qh8 Kh8 42.a7 Qf2) 41.Ng3 (41.Qg7 Kg7 42.Ra2 Ba2 43.f5 Qe1 44.f6 Kf6 45.Kg2 Bd5 46.Kh3 Qf1 47.Kg4 Qf2 48.e4 Be6 49.Kh5 Qh2) 41...Qg3 42.Kf1 Qg1 43.Ke2 Rg2 44.Kd3 Qe3 0–1. dbinc007 – northcoaster, gameknot.com, 2019.

4.Bb2 Nc6 5.b5 Ne7 (5...Na5+=) 6.Be2 (better is 6.Be5!? Ng6 7.Bf6 Qf6 8.Nc3+/–) 6...Ng6= 7.h4 d6 8.a4 (8.h5 Ne7=) 8...b6 (8...Be6 9.h5 Ne7 10.a5=) 9.h5 Ne7 10.Nh3 Bh3 (10...Bf5 11.h6=) 11.Rh3+= Nf5 (11...Qc7 12.f4+=) 12.f3 (12.Bf3 Rb8+/–) 12...g6 (12...Nd7 13.Bd3 Ne7 14.c4+=) 13.c4 (13.hg6 fg6 14.g4+/–) 13...Nh5 (better is 13...g5!?+=) 14.g4+– Nfg3 (14...Be7 15.Qc2 Bh4 16.Kd1 Nhg3 17.gf5 gf5+–) 15.gh5 Nh5 16.f4 Bg7 17.Bh5 gh5 18.Qf3 Qe7 19.Qa8 Qd8 20.Qd8 Kd8 21.a5 Kc7 22.ab6 ab6 23.Ra7 Kb8 24.Rf7 Bf8 25.Rh5 1–0. smoothmovermovesagain – yulio, ChessWorld.net, 2006.

4.b5 b6 5.Nc3 (5.Bb2!?+=) 5...Bb7 6.Nf3 d6 7.Bc4 (7.Be2 Nbd7=+) 7...d5=+ 8.Be2 Nbd7 9.a4? (9.0-0 Bd6-/+) 9...Be7 (9...e4 10.Ng5-+) 10.h3 (10.a5!? ba5 11.0-0-/+) 10...0-0 11.Bb2 d4 12.ed4 (12.Na2 e4 13.Nh2 Ne5-+) 12...ed4 (12...e4!? 13.Nh4 cd4 14.Nb1-+) 13.Nb1 Re8 14.0-0 Bd6 15.d3?? (15.Na3 Nd5 16.g3 Qc7-/+) 15...Re7 (better 15...Qe7-+) 16.Re1-/+ Qc7 17.Nbd2 Nd5 18.Nc4 Rae8 19.Bf1 Re1 20.Ne1 Nc3 (better 20...Bh2 21.Kh1 Ne5-/+) 21.Nd6? (21.Bc3 Bh2 22.Kh1 dc3-/+) 21...Qd6 (better 21...Nd1 22.Ne8 Qd8 23.Rd1 Qe8-+) 22.Bc3-/+ dc3 23.Nf3 Nf6 24.Ng5 (24.g3 h6=+) 24...Qd5 (24...Qf4 25.Nf3-/+) 25.Nf3 Rd8 (25...Qd7 26.g3=+) 26.Ra3 c4 27.Rc3 (better 27.d4 Ne4 28.Qc1=+) 27...Qc5?? (better 27...Ne4 28.Qe1 Nc3 29.Qc3 cd3 30.Bd3 Qd6-+) 28.Rc4?? (better 28.d4 Bf3 A) worse 29.dc5 Bd1 (worse 29...Rd1 30.gf3 bc5 31.Kg2+–) 30.c6 Bh5=+; B) 29.Qf3 Qd4 30.Rc4+–) 28...Bf3 (better 28...Qc4! 29.Nd2 Qa4-+) 29.Qf3+– (29.gf3?? Qc4 30.Qe2 Qa4-+) 29...Qe7 30.d4 Nd5 31.Bd3 g6 32.g3 h5 (32...Kg7 33.Kg2+–) 33.h4 Nb4 (33...Kg7 34.c3+–) 34.Qe2 Qe2 (34...Qd6 35.Be4+–) 35.Be2 Rd7 (35...Nd5+–) 36.Rb4 1–0. dbinc007 – irontigran1, gameknot.com, 2018.

4.bc5 Bc5 5.Bb2 d6 6.Bc4 0-0 7.Nf3 Bg4 8.h3 Bh5 9.0-0 e4 10.g4 ef3 11.gh5 Nh5 12.Qf3 Qg5 13.Kh2 Nf6 14.Rg1 Qg1 15.Kg1 Nbd7 16.Nc3 Rfe8 17.Nd5 Ne5 18.Qe2 Ne4 19.Be5 Re5 20.d4 Rg5 21.Kh1 Bb6 22.Ne7 Kf8 23.Qf3 f6 24.Qe4 Re8 25.Ng6 hg6 26.Qb7 Rge5 27.de5 de5 28.Rd1 Re7 29.Qa8 Bd8 30.Qg2 Bc7 31.Qg6 Bd6 32.Rd6 Rc7 33.Rc6 Rc6 34.Qf7 1-0. chessito (1640) - salazer (1710), Rated Bullet game, lichess.org.

5.ab4 Bb4 6.Be5 0-0 7.Nf3 (7.Bb8 Rb8 8.Ra7 d5=) 7...Nc6= 8.Bb2 Re8 9.Bd3 d5 10.0-0 Bd6 11.Nc3 Ng4 (11...Bg4 12.Be2=) 12.Nd5+= Bh2 (better is 12...Nh2!? 13.Nf6 gf6 14.Nh2 Be5+=) 13.Nh2+– Nh2 14.Qh5 (14.Kh2?! Qd5 15.Kg1 Be6=) 14...Ng4?? (better is 14...g6 15.Qh2 Qd5+/–) 15.Qh7 Kf8 16.Qg7 (16.Bg7?!=) 1–0. pierre – zfik, internet, 2009.

5.ab4 Bb4 6.Be5 Nc6 7.Nf3 =.

5.ab4 Bb4 6.Be5 Nc6 7.Bf6 Qf6 (< 7...gf6 8.Qh5+=) 8.c3 Be7 9.d4 Qf5 (9...d5!?=+) 10.Bd3+= Qg5 11.Nf3 Qg2 (11...Qh5 12.c4+=) 12.Rg1 Qh3 13.d5 Nd8 14.Rg7 Kf8 (14...b6 15.Nbd2+/–) 15.Rg3 Qh5 16.Be2 Rg8 17.Qd4 d6 18.Nbd2 b6 19.Bd3 Bb7 20.c4 Rg3 21.hg3 Kg8 22.0-0-0 (22.g4!? Qh6 23.Ne4+/–) 22...Rc8+= 23.Kb1 Rc7 24.Qf4 b5 (better is 24...a5!?+/–) 25.g4+– (25.cb5?! Bd5 26.g4 Qh3+=) 25...Qh3 26.Rg1 (26.cb5?! Bd5 27.Qf5 Be6+=) 26…Kg7 1–0. Luzuriaga,Norberto Horacio (2350) – Cakl,Miroslav, corr W–Cup12 Gr081, 2000.

5.Be5 ba3 6.Na3 a6 (better is 6...Be7!?+=) 7.Nb5+/– d6 8.Bf6 gf6 9.Ne2 Bg4 10.h3 Be2 11.Be2 (11.Ke2?! Nc6 12.Nd4 Nd4 13.ed4 Bg7=) 11...Nc6 12.Nc3 Bg7 13.Qb1 Qd7 14.Nd5 Rb8 15.c3 0-0 16.Bg4 Qd8 17.Bf5 Ne5? (better is 17...h6+–) 18.Bh7 Kh8 19.d4 Ng6 20.Bg6 fg6 21.Qg6 Qd7 22.h4 Qf7 23.h5 Qd5 (23...f5 24.Ra5 Qe8+–) 24.h6 Qc5 (24...Rf7 25.hg7 Kg8 26.Rh8) 25.Qg7 1–0. Fritz 8 – NN, Blitz:1', 2005.

5.Bb2 Bd6 6.c4 Be6 (better 6...d4!?-/+) 7.cd5=+ Nd5 8.Be2 0-0 9.d3 (9.Qc2 a6 10.ba6 Na6=+ (worse 10...Ra6 11.Ba6 Na6 12.Nf3+=)) 9...Qa5 (9...a6 10.ba6 Ra6 11.Nd2-/+) 10.Qd2-/+ Qb5 11.Nc3 Nc3 12.Bc3 Qc6 Black prepares the advance c4 13.Nf3 f6 14.0-0 Rd8 15.Rfd1 (15.Qc2 Na6-/+) 15...e4 16.Ne1 c4 17.d4 Na6 (17...Qd5 18.Nc2-/+) 18.Nc2 (better 18.d5 Qc7 19.g3-/+) 18...Nc5 19.dc5 Bh2 20.Kh2 Rd2 21.Rd2 Qc5 22.Bb4?? (better 22.Kg1=) 22...Qe5-+ 23.Kg1 c3 (better 23...a5!? 24.Bd6 Qb2 25.Bc4 Bc4 26.Rad1-+) 24.Rd6?? (better 24.Rd4!?=) 24...Bb3 (better 24...a5 25.Re6 Qe6-+) 25.Nd4-/+ Rc8?? (better 25...a5 26.Bc3 Qd6 27.Nb3 b6-/+) 26.Nb3+– c2 27.Rc1 (better 27.Rd4!? Qe6 28.Bc5 Kh8+–) 27...Qb2 28.Bg4 Rc7?? (28...Re8 29.Rd2 Qb3 30.Rdc2 a6+–) 29.Be6 Kf8 (29...Kh8 30.Rd8) 30.Rd8 1–0. dbinc007 – elder72, gameknot.com, 2017.

5.c4 Bd6 6.cd5 Nd5 7.Bb2 0-0 (7...Be6 8.Nc3=+) 8.Qc2 b6 (8...Nd7 9.Nc3 Nc3 10.dc3=+) 9.Bc4 (9.Bd3 g6+=) 9...Be6 (9...Nf6 10.Nf3 Qe7 11.0-0=) 10.Nf3 Nd7 (10...a6 11.Ne5 Qh4 12.g3+=) 11.h4 (better 11.Qd3 N7f6 12.Ne5+/-) 11...f5?? (better 11...Nc7 12.Ng5 Nf6 13.Be6 fe6+=) 12.Ng5+- Qe7 (12...Qe8 13.Qb3 N7f6 14.Nc3+-) 13.g4 (13.Ne6 Qe6 14.Nc3 N7f6 15.Nd5 Nd5+-) 13...e4? (13...Kh8 14.Ne6 Qe6 15.gf5 Qf7+-) 14.gf5 (worse 14.Ne6 Qe6 15.Nc3 N7f6 16.Nd5 Nd5+-) 14...Rf5 (14...Ne3 15.fe3 Bc4 16.Qc4 Kh8 17.Qe4 Qe4 18.Ne4 Be5 19.Be5 Ne5+-) 15.Ne4 (better 15.Qe4 N7f6 16.Bf6 Qf6 17.Nc3+-) 15...Raf8 (15...Be5 16.Nbc3 Nc3 17.Be6 Qe6 18.Bc3 (worse 18.Nc3 Raf8=+) 18...Bc3 19.dc3=) 16.d3 (16.Nd6 Qd6 17.e4 Rf2 18.Bd5 Rf1 19.Rf1 Qg3 20.Ke2 Qg2 21.Kd3 Qf1 22.Kc3 Bd5 23.ed5 Qb5 24.Qd3+=) 16...Ne5 (16...Be5 17.Be5 Ne5 18.Nbd2=) 17.Nbd2 (17.Nd6 Qd6 18.Bc1 Rf2 19.Qf2 Rf2 20.Kf2 Ng4 21.Ke2 Qg3-+) 17...Kh8 (17...Bc7 18.Ng5+=) 18.0-0-0+/- Nc4 (18...Rf2 19.Be5 Be5 20.Nf2 Ne3 21.Qa2 Rf2 22.Be6=) 19.Nc4 (19.dc4 Nc7+/-) 19...Bc7 20.f4 (20.Rhg1 Rg8+/-) 20...a6+= 21.Rdg1 Nf6 (better 21...R5f7 22.ba6 b5+/-) 22.Qg2 (22.ba6 Nh5+/-) 22...Bc4 (22...ab5!? 23.Ncd2 Bd5=+) 23.Nf6 (23.dc4 ab5 24.Nf6 R8f6+=) 23...gf6+= (worse 23...R8f6 24.dc4 ab5 25.h5+/-; 23...Bb5?? 24.Nd5 Be5 25.Ne7 Bb2 26.Qb2+-; 23...Qe3 24.Kb1 Qd3 25.Ka1+/-; 23...ab5? 24.Qe4 Rf7 25.Ne8 (25.Qf5?! Qe3 26.Kc2 Qe2 27.Kc1 Qe3 28.Kc2 Qe2 29.Kc1 Qe3=; 25.dc4?! R5f6 26.Qe7 Re7 27.Bf6 gf6+-) 25...Bd3 26.Qe7 Re7 27.Rg7 Rg7 28.Ng7+- (28.Bg7?! Kg8+/-); 23...Bd3?? 24.Nd5 Rg5 25.hg5+-) 24.dc4 Qe3 25.Kb1 Do you see the mate threat? 25...Qe7 (25...Qd3 26.Ka1 Qd7 27.Rd1+/-) 26.ba6 Rf4?? (26...Bb8+/-) 27.Re1 (27.a7 Re4+-) 27...Qg7?? (better 27...Be5+=) 28.Qg7+- Kg7 29.Re7 Rf7 (29...Kg6 30.h5 Kf5 31.Rc7 Rc4 32.Rh7 Ra4+-) 30.Rf7 (30.Rg1!? Kf8 31.Rf7 Kf7+-) 30...Kf7 31.a7 (31.a7 Be5 32.a8Q Bb2 33.Qb7 Kf8 34.Kb2 Rf2 35.Kb1 Rg2 36.Re1 Rg3 37.Qd7 Rb3 38.Kc2 Rb2 39.Kb2 b5 40.Re8) 1-0. combijack (1825) - romast (1825), gameknot.com, 2020.

5.c4 Be6 6.cd5 Nd5 7.Qf3=+.

5.Ne2-/+.

4.Nc3 a5 A) 5.Bb2 Be7 (5...d5 6.Nf3 Nbd7 7.b5 Bd6 8.Be2 0-0 9.0-0+=; 5...ab4 6.ab4 Ra1 7.Qa1 Bf5 8.Qa8 Qc8 9.Bd3+=; 5...Nbd7 6.Nf3 d5 7.b5 Bd6 8.Be2 0-0 9.0-0+=; 5...Be6 6.Nf3 Be7 7.d4 Nbd7 8.Bd3 e4 9.Be4=) 6.Nf3 ab4 7.ab4 Ra1 8.Ba1 0-0 9.e4+=; B) 5.ba5 Be7 (5...Ra5 6.Nf3 Be7 7.e4 0-0 8.Bc4 c6 9.Bb3+=; 5...Nbd7 6.a6 ba6 7.Rb1 d5 8.d4 e4 9.Nge2+=; 5...d5 6.Bb2 Ra5 7.Nf3 Nbd7 8.Bb5 c6 9.Be2+=) 6.e4 0-0 7.Nf3 Ra5 8.Bc4 c6 9.d4+=; C) 5.b5 d5 6.Nf3 Bd6 7.Bb2 0-0 8.Be2 Nbd7 9.0-0+=.

4.Nc3 d5 5.Nf3 Nbd7 (5...a5 6.b5 Bd6 7.Bb2 0-0 8.Be2 Nbd7 9.0-0+=; 5...e4 6.Nd4 a5 7.b5 Bd6 8.Be2 0-0 9.Bb2+=) 6.Bb2 a5 7.b5 Bd6 8.Be2 0-0 9.0-0 +=.

4.Nc3 Be7 5.d4 (5.Nf3 e4 (5...0-0 6.e4 Nc6 7.Be2 Nd4 8.0-0 c6 9.Bb2+=; 5...a5 6.b5 0-0 7.e4 Nbd7 8.d4 ed4 9.Qd4=) 6.Nd4 0-0 7.d3 d5 8.de4 de4 9.Bb2+=; 5.e4 Nc6 (5...a5 6.b5 0-0 7.Nf3 Nbd7 8.d4 ed4 9.Qd4=; 5...Be6 6.Nf3 0-0 7.d4 a5 8.b5 Nbd7 9.d5=; 5...0-0 6.Nf3 Nc6 7.Be2 Nd4 8.0-0 c6 9.Bb2+=) 6.Bc4 0-0 7.Nge2 Ne4 8.Ne4 d5 9.Bd3+=; 5.Be2 a5 (5...0-0 6.Bb2 Be6 7.Nf3 a5 8.b5 Bf5 9.0-0=; 5...d5 6.Nf3 a5 7.Bb2 Nbd7 8.b5 0-0 9.0-0=) 6.b5 0-0 7.Nf3 e4 8.Nd4 c5 9.bc6+=; 5.Bb2 0-0 (5...Bf5 6.Qf3 Qc8 7.e4 Bg4 8.Qd3 a5 9.b5=; 5...a5 6.b5 0-0 7.Nf3 Nbd7 8.Be2 a4 9.0-0=; 5...Be6 6.Nf3 0-0 7.Be2 a5 8.b5 Bf5 9.0-0=) 6.Nf3 e4 7.Nd4 c5 8.Nb3 Nc6 9.b5+=) 5...0-0 (5...ed4 6.ed4 0-0 7.d5 a5 8.b5 Ng4 9.Nf3+=; 5...a5 6.de5 ab4 7.ed6 bc3 8.de7 Qd1 9.Kd1 Ke7+=) 6.d5 Bg4 (6...a5 7.b5 Nbd7 8.Bd3 Nb6 9.e4=) 7.Be2 Be2 (7...Bf5 8.Nf3 a5 9.Rb1=) 8.Nge2 c6 (8...a5 9.ba5=) 9.dc6 (9.0-0=) 9...Nc6 (9...bc6 10.e4+=) 10.h3 (better is 10.e4!?+=) 10...d5+= 11.0-0 a6 12.Bb2 Rc8 13.Re1 Re8 14.Rc1 Bf8 15.Ba1 (15.Qd3 e4 16.Qd2 Ne5+=) 15...Ne7 16.Ng3 Qd7 17.Qe2 Nf5 (better is 17...Rc6!?+=) 18.Nf5+= Qf5 19.Na4 (better is 19.Nd5!? Nd5 20.e4+=) 19...e4 (19...Qe6 20.Qd3+=) 20.c4 dc4 21.Rc4? (21.Nb6 Rc6 22.Bd4-/+) 21...Rc4-+ 22.Qc4 Qd5?? (better is 22...b5 23.Qf1 ba4 24.Qa6 Nd5-+) 23.Nb6 (23.Qd5 Nd5 24.Rd1 Nc7+=) 23...Qc4 24.Nc4 h6 25.Bf6 gf6 26.Rd1 Kg7 27.Rd7 b5 28.Nb6 Re6 29.Nd5 Rd6 30.Rd6 Bd6 31.Kf1 f5 32.Ke2 h5 ½–½. pillsbury (2145) – israelflavio (2445), net–chess.com, 2014.

4.c4 a6 5.Bb2 Bd7 (5...Be7 6.Ne2=+) 6.Nf3 Be7 7.Be2 0-0 8.0-0 c5 (8...e4 9.Ne1=) 9.d3 (9.bc5 e4 10.cd6 Bd6+=) 9...b5 (9...Qb6 10.Qd2=) 10.Nc3 (10.bc5 Nc6+=) 10...h6 (10...cb4!? 11.ab4 Nc6=) 11.cb5 ab5 12.d4 (12.bc5!? Re8 13.d4+–) 12...ed4= 13.ed4 c4 14.Re1 d5 15.Ne5 Bf5 (better 15...Na6!?=) 16.Bf3 Qe8 (16...Re8!?+–) 17.Nd5+– Nd5 18.Bd5 Ra7 19.Qf3 Be6 20.Be6 (20.Ng6 fg6 21.Re6 Kh8+–) 20...fe6 21.Qg3 (21.Qe4+–) 21...g5 (21...Bd6 22.Qh3+–) 22.Nf3 (22.Qh3 Bf6 23.Ng4 Ra6+–) 22...Bf6 23.Ne5 Nd7 (23...Be7 24.Qh3 Bf6+–) 24.Nc6 (24.Ng4 Bg7 25.Qd6+–) 24...Ra8? (better 24...Ra6!? 25.Na5 Qb8+–) 25.Qd6 Qf7 26.Qe6 Qe6 27.Re6 Rae8 (27...Rfc8 28.Rc1+–) 28.Rae1 Re6 29.Re6 Bg7 (29...Kf7 30.Rd6 Nb6+–) 30.Re7 Nf6 31.d5! Re8 (31...Nd5 32.Rd7 Double attack (32.Bg7 Pinning; 32.Bg7 Deflection; 32.Rd7 Decoy; 32.Bg7 Clearance)) 32.Bf6 Re7 33.Ne7 Kf7 34.Bg7 Kg7 35.Nf5 (35.Nf5 Kf6 36.Nd6+–) 1–0. jlbaf (2415) – ctessman (2270), net–chess.com, 2016.

4.c4 b6 5.Nc3 Bb7 6.Nf3 Nbd7 7.d4 e4 8.Nd2 g6 9.Qc2 Qe7 10.Bb2 Bg7 11.d5 0-0 12.Nce4 Rfe8 (better is 12...Ne4!? 13.Bg7 Nf2 14.Kf2 Kg7=) 13.Nf6+/– Nf6 14.Be2 Bc8 15.0-0 Bf5 16.Bd3 Be4 17.Ne4 Ne4 18.Bg7 Kg7 19.Rac1 Nf6 20.h3 a5 21.Qc3 Qe5 22.Qe5 Re5 23.Rc3 Nd7 24.e4 Rg5 25.f4 Rh5 26.Be2 Rh4 27.Kh2 Nf6 28.Re3 ab4 29.ab4 Re8 30.e5 de5 31.fe5 Ne4?? (31...Nd7 32.e6 fe6 33.de6 Nf6+–) 32.g3 Nd2 33.gh4 Nf1 34.Bf1 1–0. Campos Calvo,Sotelo Juan (2035) – Alfageme Sanchez,Jesus (1920), Madrid–ch Seniors, 2008.

4.c4 c5 5.b5 (5.Nc3 Nc6=) 5...a5 (better 5...a6!?=+) 6.Nc3= b6 7.Qc2 Be7 8.Nf3 h6 9.Be2 Bb7 10.h4 (10.0-0 Nbd7+=) 10...e4= 11.Ng1 Qd7 12.Bb2 0-0 (12...Qc8=) 13.f4 (13.Nh3 Qf5+=) 13...ef3 (13...Re8 14.Na4 Bd8 15.Qd1=+) 14.Nf3 Qg4 15.0-0-0 Be4?? (better 15...Qc8=+) 16.Ne4+– Ne4?? (16...Qe4 17.Bd3 Qb7 18.Bf6 Bf6+–) 17.Ng5 Qf5 (17...Qe2 A) 18.Ne4?! f5+= (18...Qg2?? 19.Rhg1 Qg6 20.Rg6 fg6 21.Nd6 Bd6 22.Qg6+–); B) 18.Qe4 Bg5 19.hg5+–) 18.Ne4 d5 (18...f6+–) 19.g4 (19.Nf6 Qf6 20.Bf6 Bf6+–) 19...Qe6?? (19...Qe4 20.Bd3 Qe6 21.cd5 Qd6+–) 20.cd5 Qd5 (20...Qd7+–) 21.Bc4 Qd8 22.g5! hg5 23.Ng5 Bf6 (23...Bg5 24.hg5 Re8 25.Qg6 Qd2 26.Rd2 Re3 27.Qg7) 24.Qh7 1–0. combijack (1840) – 8squaresacross, gameknot.com, 2018.

4.c4 Bf5 5.d3 a5 6.b5 b6?? (better 6...Be7=) 7.Qf3+– 1–0. Cirulis,Ilmars (1905) – Carrasco,Emanuel (1800), FICGS, 2016.

4.c4 Bg4 5.Qc2 (5.Be2 Be2 6.Ne2 a5=) 5...d5 (5...a5 6.b5=+) 6.cd5= Nd5 (6...a5 7.b5=) 7.Nc3 (7.Nf3 Bd6+=) 7...Nc3 8.Qc3 Bd6 9.Bb2 0-0 10.Be2 Qg5 (10...Be2 11.Ne2 Nd7 12.0-0=) 11.Nf3 Bf3 12.Bf3 c6 13.0-0 Nd7 14.Rac1 Nf6 15.h3 (15.d3 Ng4 16.Be2 Nf6+=) 15...Rfe8 (15...e4 16.Be2 a5=) 16.d4 (better 16.Qd3!? Re6 17.Qc2+=) 16...e4-/+ 17.Be2 Nd5 18.Qb3 (better 18.Qc2=+) 18...Bf4?? (better 18...Re6 19.Rce1 Rf8-+) 19.Rc5?? (better 19.ef4 Nf4 20.Bg4+–) 19...Bd6= 20.Rc2 (20.Rcc1 Re6 21.Bg4 Rf6-+) 20...Re6=+ 21.Bg4 (better 21.Bc4!?=+) 21...Rg6 22.f4 Qh4 23.Bc1 h5 24.f5?? (24.Bf5 Rg3 25.b5 (25.Be4? Nf4 26.Rf4 Bf4-+) 25...Nf4 26.Qa2-/+ (26.bc6?? Ng2 27.Qf7 Kf7 28.Be4 Nf4 29.Bg2 Qh3 30.ef4 Rc8-+)) 24...Rg5 (better 24...Rg4 25.Qc4-+) 25.Bd1 (25.Bf3 Qh3 26.Be4 Qh2 27.Kf2 Qh4 28.Ke2 Qe4-+) 25...Qh3 26.Rff2 (26.g4 Nf6 27.Rg2 Ng4 28.Bg4 Rg4 29.Rff2 Qh2 30.Kf1 Qh1 31.Ke2 Rg2 32.Rg2 Qg2 33.Kd1-+) 26...Qh2 27.Kf1 Bg3 (27...Qh1 28.Ke2 Rg2 29.Qd5 cd5 30.Kd2 Rf2 31.Kc3 Rc2 32.Kc2 Rc8 33.Kb2 Qd1 34.Ka2 Rc1 35.a4 Bb4 36.Kb2 Qc2) 28.Rf3 Qh1 29.Ke2 Qe1 0–1. dbinc007 – bobwhite23, gameknot.com, 2018.

4.c4 g6 5.Bb2 (5.d4 Bg7=) 5...Bg7=+ 6.Nc3 0-0 7.Nf3 Bg4 (7...e4 8.Nd4=) 8.Be2 (8.h3 Bd7=) 8...a5 (8...e4 9.Nd4 Be2 10.Nde2=) 9.0-0 ab4 (9...e4 10.Ng5 Be2 11.Qe2=) 10.ab4 Ra1 11.Qa1 (11.Ba1 Re8=) 11...Re8 (11...Qe7 12.h3 Bf5 13.Qa7=) 12.Qa7 (12.h3 Bd7=) 12...Qc8 13.b5 Nbd7 14.h3 Bf3 15.Bf3 c6 (15...e4 16.Be2=) 16.bc6 (16.d3 Nc5 17.Rd1 Ne6+=) 16...bc6= 17.Ra1 (17.d4 Qb8 18.Qa1 ed4 19.ed4 Qb7=) 17...e4 18.Be2 Nc5 (18...Ne5 19.Ra6=) 19.Na4 (19.Ra2 Qb8=) 19…Qb7 (19...Qb7 20.Qb7 Nb7=). mgriffin (1870) – dsgman, net–chess.com, 2001. (=1.a3 Nf6 2.b4 e5 3.e3 d6 4.c4 g6)

4.d4 Nc6 =+.

4.d4 e4=+ 5.d5 Nbd7 6.Nc3 Be7 7.Qd4 a5 8.Bb2 ab4 9.ab4 +=.

4.Be2 A) 4...Be7 5.Nf3 0-0 6.0-0 e4 7.Ne1 a5 8.b5 d5 9.Bb2=; B) 4...a5 5.b5 d5 6.d4 e4 7.c4 Be6 8.Nd2 Be7 9.Qc2=; C) 4...d5 5.Bb2 Bd6 6.Nf3 Nbd7 7.Nc3 a6 8.0-0 0-0 9.d3=+.

4.Nf3 e4 5.Nd4 =+.

4.Nf3 g6 5.h3 (5.Bb2 e4 6.Ng5 Bg4+/–) 5...Bg7 6.Bb2 0-0 7.c4 (7.d4 ed4 8.Nd4 a5=) 7...Re8 (7...e4 8.Ng1=+) 8.Nc3 (8.d4 ed4 9.Nd4 Nbd7=) 8...Nbd7 9.Be2 (9.e4 Nb6=) 9...e4 10.Nh2 (10.Nd4 Ne5=+) 10...Ne5=+ 11.Qb3 (11.g4 Be6 12.g5 Nfd7 13.Ne4 Bh3 14.Nf6 Bf6 15.gf6 Be6=) 11...c6 12.f4 ef3 (12...Nd3!? 13.Bd3 ed3=+) 13.Nf3= Nh5 14.0-0 Ng3 15.Rf2 Be6 16.Ne5 (16.Rc1 b5 17.Ne5 Be5=+) 16...de5 17.Qc2 Qh4 (17...Qg5 18.Ne4 Ne4 19.Qe4-/+) 18.c5 (18.e4 f5 19.d3 Bh6=) 18...Rad8 19.Bf1 Rd7 20.d3 Red8 21.Ne4 Ne4 22.de4 Qg5 23.Rf3 Rd2 24.Qc3 R8d3 (better is 24...Qh4-/+) 25.Qd3= Rd3 26.Bd3 Qd8 (26...Bb3 27.Raf1=) 27.Rd1+= Qh4 28.Bc3 Bb3 29.Rd2 Bh6 (29...b5 30.Kh2+=) 30.Bf1 Qe4 31.Rd8 Kg7 32.Bd3 =. Basman,Michael – Kinlay,Jonathan, Bristol, 1980.

5.Bb2 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4).

5.Qc2 0-0 6.Nf3 h6 7.Bb2 Nc6 8.Nc3 b6 9.h4 (9.Bd3 a6+=) 9...Bb7 10.Ng5 Qd7 (10...a5 11.Nd5 A) worse 11...hg5 12.hg5 g6 13.gf6 (worse 13.Nf6 Bf6 14.gf6 ab4=+) 13...Bf6 14.b5+–; B) 11...g6+=) 11.Nd5+= g6 (11...hg5 12.hg5 Nh5 13.Rh5+–) 12.Bd3 (12.Ne4 Ne4 13.Qe4 h5+=) 12...Kg7 (12...hg5 13.hg5 Nd5 14.cd5=+) 13.f4 (better 13.Ne4 Nd5 14.cd5+=) 13...ef4?? (better 13...hg5!? 14.Nf6 Bf6 15.hg5 Bg5 16.fg5 Qg4-+) 14.Nf4?? (14.ef4 Nb8 15.Nf6 Bf6 16.Bf6 Kf6 17.Qc3 Ke7 18.Nh7+–) 14...Qg4 (14...Ne5 15.Bg6 Qg4 16.Be5 de5 17.Bf7=) 15.Ne4 (15.Nf3 Kg8 16.Rh3 Rfd8+–) 15...Ne5= 16.Nf2 Nd3 (16...Qd7!?=) 17.Qd3+– Qd7 18.0-0-0 (better 18.h5 g5 19.Nd5 Bd5 20.cd5+–) 18...Kg8?? (better 18...a5=) 19.Ng6!+– Rfe8? (19...fg6 20.Qg6 Double attack) 20.Nf4 (better 20.Ne7 Qe7 21.Qf5+–) 20...Bd8 (better 20...c5!?+–) 21.Rh3+– Kf8 22.Rg1 (better 22.g4 Ne4 23.g5+–) 22...d5? (better 22...c5+–) 23.g4+– Ne4? (23...dc4 24.Qc3 Re6+–) 24.Ne4 Re4 25.cd5 Re8 (25...Rf4 26.ef4 Bd5+–) 26.Qd4 f6 27.Ne6 (better 27.g5 c5 28.bc5 bc5 29.Qc4 Bd5 30.Nd5 hg5 31.Rf3+–) 27...Kf7 (27...Re6 28.de6 Qe6 29.Qf4+–) 28.Rf1 (better 28.Nd8 Qd8 29.Rf1+–) 28...Bd5 (28...Re6 29.de6 Qe6+–) 29.Nd8 Qd8 30.Rf6 (30.Rf6 Ke7 31.Qe5 Kd7 32.Qd5 Kc8 33.Qa8 Kd7 34.Qc6 Kc8 35.Rf7 Kb8 36.Rhf3 Rg8 37.Be5 Rh8 38.Bc7 Qc7 39.Qc7 Ka8 40.Qa7) 1–0. combijack (1840) – homyak (1735), gameknot.com, 2018.

5.Nc3 0-0 6.Be2 (6.d4 a5 7.b5 ed4 8.ed4 Re8 9.Be2=+) 6...Re8 (6...a5 7.b5=+ e4 8.f3 Bf5 9.Bb2=) 7.Nf3 c6 (7...e4 8.Ng5 Bf5 9.f3=) 8.0-0 (8.d4 a5 9.b5=) 8...Nbd7 (8...e4 9.Nd4=) 9.d4 (9.Bb2=) 9...e4 10.Nd2 d5 11.f3 Bd6 (11...ef3 12.Bf3 dc4 13.Nc4=) 12.fe4+= Ne4 13.Nde4 de4 14.c5 Bc7 15.d5 Be5 16.Qe1 (better is 16.dc6!? bc6 17.Qe1=) 16...cd5-/+ 17.Ra2 Nf6 18.Nb5 a6 19.Nd4 Bd7 (19...a5 20.Bb2-/+) 20.Bb2=+ Rc8 21.Nb3 Qc7 22.Qh4 Bb2 23.Rb2 Qe5 (23...Ba4 24.Nd4 Re5 25.Rd2=) 24.Nd4= h6 25.Rd2 a5 26.Bb5 (26.ba5 Qc7 (26...Rc5)) 26...ab4 27.Rf6 Bb5 28.Rf5 Qc7 29.ab4 Bd7 30.Rd5+= Ra8 31.Qg3 Qd8 32.Nf5+– Qf6 33.Qg7! Qg7 34.Ng7 Kg7 35.Rd7 Ra3 36.Kf2 Re6 37.Rb7 Rf6 38.Ke2 Ra1? 39.Re7 Rg1 40.Re4 Rg2 41.Kd3 Rd2 42.Kd2 Rf2 43.Kc3 Rh2 44.c6 (44...Rh1 45.Kb2 Rh2 46.Kb3+–) 1–0. Bulcourf,Carlos – Fornichelli, Buenos Aires CAA, 1993.

5.d4 0-0 6.Nc3 ed4 7.ed4 Re8 8.Be2 d5 9.c5 =+.

4.Bb2 0-0 5.c4 h6 6.Be5 Re8 7.d4 d6 8.Bg3 Ne4 9.Bd3 Ng3 10.hg3 Bf6 11.Nd2 (11.Ne2!?=) 11...Bd4 12.Rb1 Bf6 13.Ngf3 Bg4 14.Qc2 Nd7 15.Bf5 (15.Bh7 Kh8=) 15...Bf5=+ 16.Qf5 Bc3 17.Ke2 (17.0-0 Nf6=+) 17...Bd2 18.Kd2 Ne5 19.Ne5 (19.Rh4 Re6=+) 19...Re5 20.Qf3 c6 21.Rbd1 (21.Rh4 f6=+) 21...d5 (21...a5!?-/+) 22.cd5= Rd5 23.Ke2 Rd1 24.Rd1 Qb6 25.Rd7 Qa6 26.Ke1 Rf8 27.e4 b5 (27...Qb5 28.Qe2 Qe5 29.Qd3+=) 28.e5 (28.Ke2 Qb6+=) 28...Qc8+= 29.Rd6 The backward pawn on c6 becomes a target 29...Re8 30.Qc3 Qf5 (30...f6!? 31.Qc6 Re5 32.Kd2 Qg4 33.Rd8 Kh7 34.Qc2 f5=) 31.f4+– Qb1 32.Kf2 Qa2 (32...Rc8 33.Rc6 Rc6 34.Qc6+–) 33.Rd2 (33.Kg1!?+–) 33...Qe6+– 34.Rd6 Qc4?? (34...Qa2 35.Kg1 Qb1 36.Kh2 Qf5+–) 35.Qc4+– (worse 35.Rc6 Qa2 36.Kg1 Qb1 37.Kh2 Qf5+–) 35...bc4 36.Rc6 Ra8?! (36...Rd8 37.Rc4 Rd2 38.Kg1 Rd1 39.Kh2 Rd3+–) 37.Rc4 Kf8 38.a4 (38.Rc7 a6+–) 38...Ke8 39.Kf3 a6 40.g4 f6?? (40...Rd8+–) 41.ef6 gf6 42.Rc7 (better 42.Ke4 Rd8 43.Rc6+–) 42...a5?? (42...Rb8+–) 43.b5 Kd8 (43...Rb8 44.Rh7 Rb6 45.Rh6+–) 44.Rc6 (better 44.Rh7 Rc8 45.Rh8 Kc7 46.Rc8 Kc8 47.Ke4+–) 44...Ke7 45.g5! hg5 (45...fg5 46.Rh6 Pinning (46.Rh6 Deflection; 46.f5 Passed pawn); 45...hg5 46.Ra6 Combination) 46.fg5 fg5 47.Kg4 (47.Ra6 Rf8 48.Kg3 Kd7+–) 47...Kd7 (47...Rd8 48.Kg5 Rd4 49.Kf5 Ra4 50.Ra6+–) 48.Kg5 Rb8 (48...Rg8 49.Rg6 Rc8 50.Rg7 Kd6+–) 49.g4 Kd8 (49...Rh8 50.Ra6+–) 50.Kf6 Kd7 51.g5 Rf8 52.Kg7 Rf4 53.Ra6 (53.g6!? Ra4 54.Kf7 Rb4+–) 53...Ra4 54.g6 Kc7 (54...Ke7 55.Kg8 Rb4 56.Ra5+–) 55.Kf7 Rf4 56.Rf6 Rf6 (56...Rd4 57.g7 Rd7 58.Kg8 Rd3+–) 57.Kf6 Kd8 58.Kf7 (58.Kf7 Kd7 59.g7 Kc7 60.g8Q Kb6 61.Qg6 Kb5 62.Qd3 Kc6 63.Ke6 Kc5 64.Qc3 Kb6 65.Kd6 Kb5 66.Qb3 Ka6 67.Kc6 a4 68.Qa4; 58.g7 Kd7 59.g8Q Kc7 60.Qc4 Kb6 61.Qc6 Ka7 62.Qc7 Ka8 63.b6 a4 64.Qa7) 1–0. dbinc007 – alistair49, gameknot.com, 2018.

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7).

4.c4 c5 5.b5 b6 6.Bb2 d6 7.d3 a6 8.a4 ab5 9.ab5 Bb7 10.Nf3 Ra1 11.Ba1 0-0 12.Be2 Nbd7 13.Nbd2 h6 14.h3 e4 15.Nh4 (15.de4 Ne4 16.0-0 f5=) 15...Nh7 (15...ed3!? 16.Bd3 Ne5=) 16.Nf5= ed3 17.Bd3 Bf6 (17...Nhf6 18.0-0=) 18.Nd6 (better 18.Be4!? Qa8 19.Bb7 Qb7 20.0-0+–) 18...Bg2=+ 19.Rg1 Bh3 (better 19...Qa8 20.f4 Bh3=) 20.Bh7?? (better 20.Qh5 Ng5 21.Rg5 Bg5 22.Qh3+=) 20...Kh7-/+ 21.N6e4 (21.Qb1!? Kh8 22.N2e4 Ba1 23.Qa1-+) 21...Ba1 22.Qa1 f5?? (better 22...f6-+) 23.Qg7 1–0. dbinc007 – salva53, gameknot.com, 2017.

4.c4 c6 5.Bb2 d6 6.Be2 Be6 7.Nf3 Nbd7 8.d4 e4 9.Nfd2 d5 10.c5 0-0 11.0-0 b6 12.f3 bc5 13.bc5 Rb8 14.Qc2 ef3 15.Nf3 Ne4 16.Nbd2 Ndf6 17.Ne4 Ne4 18.Bd3 Bf5 19.Ne5+/– Qc7?? 20.Rf5+– Bf6 21.Ng4 (21...Rfe8 22.Be4 Re4 23.Nf6 gf6 24.Raf1+–; 21.Be4 de4 22.Ng4 Bd8+–) 1–0. Trkn – Cuthbert, itsyourturn.com, 2001.

4.Nf3 d6 5.Be2 0-0 6.Nc3 (6.0-0 e4 7.Ne1 a5+=) 6...a6 (6...e4 7.Nd4+=) 7.0-0 (7.e4 Nc6=) 7...Nc6 8.d4 ed4 (8...e4 9.Nd2 d5 10.Bb2+=) 9.ed4= b5 (9...d5 10.Ne5=) 10.d5+= Ne5 11.Re1 Bb7 12.a4 ba4 (12...a5 13.ba5 (worse is 13.ab5 ab4 14.Ra8 Qa8-/+; 13.Nb5?! Bd5 14.ba5 c6=) 13...b4 14.a6 Ba6 15.Ba6 Ra6 16.Nb5=) 13.Ra4 Nf3 (13...c6 14.Bf4+=) 14.Bf3+/– (14.gf3?! Re8=) 14...Re8 15.Bf4 Qd7 16.Qd3 (better is 16.Ra5+/–) 16...Bd5? (better is 16...c5!?+=) 17.Nd5+/– Nd5 18.Bd5 Qa4 19.Ba8 Ra8 20.Re7 Qa1 21.Qf1 Qf1 22.Kf1 Rc8 23.Re4 h6 24.Rc4 g5 25.Bd6! c6 26.f4 gf4 27.Bf4 Kg7 28.Rc5 1–0. Grimm,Wolfgang (2040) – Neumann,Frank (1640), RSX5D–A00–Sokolsky–1, 2010.

4.Nf3 e4 5.Nd4 d5 6.c4 (6.Nc3 0-0=+) 6...c5 (6...a5!? 7.cd5 ab4-/+) 7.bc5= Bc5 8.Nc3 (8.cd5 0-0 9.Nb3 Bb6=+) 8...0-0 (8...Bd4!? 9.ed4 Nc6-/+) 9.Nb3 Qd6 (better 9...d4!? 10.Na4 b6 11.Nac5 bc5 12.Nc5 Nc6=+) 10.cd5 Bf5 (10...Na6 11.Bb2+=) 11.Nb5 (11.Nc5 Qc5 12.Qb3 Nbd7+–) 11...Qe7 12.d4 (12.Bb2!? Nd5 13.Qh5+–) 12...ed3+= 13.Nc5 (13.Bd3 Bd3 14.Qd3 Rd8=) 13...Qc5= 14.Bd3 Bd3 (worse 14...Nd5 15.Bf5 Qb5 16.Rb1+–) 15.Qd3 Qd5 (15...Nbd7!?=) 16.Qd5+– Nd5 17.e4 a6 18.ed5 (18.Nd6 Nc3 19.Be3 Nd7+=) 18...ab5+= 19.0-0 (19.Rb1 Ra5+=) 19...Rd8 20.Rd1 b4 21.a4 (21.Bb2 f6+=) 21...Nd7 (21...Ra5 22.Bf4 Na6 23.d6=) 22.Bg5 (22.Be3 Nf6 23.d6 Ne4=) 22...f6 23.Bf4 (23.Be3 Ne5=) 23...Ne5 (23...Nc5 24.a5=+) 24.Rd4 b5 25.Be5 fe5 26.Rb4 Rd5 27.f3 Ra4 28.Raa4 ba4 29.Ra4 Kf7 30.f4 Rd4 31.Ra7 Kg6 32.fe5 Rd5 33.Ra6 (33.Re7 Rd2=) 33...Kf7 34.Ra7 Kf8 35.e6 Re5 36.Rf7 Kg8 ½–½. Lee Wing Kin – Xiao,Yao, Jolimark HK Open, 2017.

5.Bb2 d5 6.Be5 Nbd7 7.Bc3 Ne4 8.cd5+= Ndf6 9.Bf6 Nf6 10.Nf3 a5 11.b5 Qd5 12.Nc3 Qc5 13.Be2 Bd6 14.Qc1 Qh5 15.Nd4 Qg5 16.g3 Bh3 17.Bf3 Rab8 18.Ne4 Ne4 19.Be4 Rfe8 20.d3 Qh5 21.Qc3 a4 22.f4 c5 23.bc6 bc6 24.Qc6 Qa5 25.Kf2 Rb2 26.Ne2 Rc8 27.Bh7 Kh7 28.Qd6?? Qh5 29.Rhe1 Rcc2 30.Qc6 Re2 31.Kg1 Rg2 32.Kh1 Rh2 33.Kg1 Rhg2 34.Qg2 Bg2 (35.Re2 Re2 36.Rb1 Qh1#) 0–1. Pierred (2210) – Grossvater (2460), Rated game, 5m + 0s, 2005.

5.Nc3 c6 6.Qc2 d5 7.Bb2 (7.Nf3 a5 8.ba5 d4-/+) 7...Be6 (7...d4 8.Na4 a5 9.b5 cb5 10.cb5=+) 8.cd5 cd5 (worse 8...Bd5 9.Nf3+=) 9.Nf3 Nbd7 10.Bb5 (10.Be2 Rc8=+) 10...Rc8 (better 10...Qb6 11.Ng5 Rfc8-/+) 11.Ng5? (11.0-0 h6=+) 11...h6?? (better 11...d4 12.Ne6 fe6-+) 12.Ne6=+ fe6 13.Qg6 Qe8 (13...e4 14.Ne2 Bd6 15.f4 ef3 16.gf3=) 14.Qg3 (14.Qe8 Rfe8 (14...Ne8?? 15.Bd7 Nc7 16.Bc8 Rc8 17.Rc1+–; 14...Rce8?! 15.0-0=) 15.0-0 a6=) 14...a6=+ 15.Ba4 Bd6 16.h4 (16.0-0!?=+) 16...Qe7-/+ 17.Qg6 Qf7 (17...e4!? 18.Ne2 Ne5 19.Be5 Be5-/+) 18.h5 b5 19.Bb3 Ne8 (19...Qg6 20.hg6 e4 21.f4=+) 20.Ne4 Qf5 (20...de4?? 21.Be6 Nef6 22.Bf7 Rf7 23.0-0+–) 21.Nd6 Nd6 22.f3 (22.Qf5 Rf5 (22...ef5? 23.Bd5 Kh7 24.Be6+–; worse 22...Nf5 23.e4 Nd4 24.Bd4 ed4 25.ed5+–) 23.a4 Nc4=) 22...Qg6=+ 23.hg6 Rf6 (23...Nc4 24.Bc4 bc4 25.Rc1=+) 24.Ke2 (24.d3!?=) 24...Rg6=+ 25.Rag1 (25.Kf2 Nc4 26.Bc4 bc4=+) 25...Rc6 (25...Nc4 26.Ba1-/+) 26.d3=+ Nb7 (26...e4 27.de4 de4 28.Kf2=+) 27.Rh5 (27.g4 Kf7=) 27...a5 28.Be5? (better 28.Kd2!?=) 28...Ne5-/+ 29.Re5 a4 (29...Rc3 30.Re6 Re6 31.Bd5 Nd8-+) 30.Bd5? (better 30.Bd1!? Rc3 31.e4-/+) 30...ed5-+ 31.Rd5?? (better 31.Kd2 Rgd6 32.e4-+) 31...Rc2 32.Kd1 (32.Ke1 Rgc6 33.d4 Rb2-+) 32...Ra2 33.Ke1 (33.Rb5 Ra1 34.Kd2 Rg1 35.Rb7 R6g2 36.Kc3 Ra1-+) 33...Nd6 (33...Rc6 34.Kd1 Rcc2 35.Re5 Kh7 36.Re8 Nc5 37.Rh8 Kh8 38.bc5 Rf2 39.Ke1 Rfb2 40.c6 Ra1) 34.g4 (34.e4 Nb7 (worse 34...Ra3 35.Kd2-+) 35.Rb5 Rc6-+) 34...Ra3 35.Kd2 Rb3 36.Rd4 (36.f4 Rb4 37.f5 Rf6-+) 36...Nf7 37.Rc1 (37.e4 Ne5 38.Rd8 Kh7-+) 37...Rd6 (37...Ne5!? 38.Rd8 Kh7 39.f4-+) 38.Rc8 Kh7 39.Rf4 (39.Rd6 Nd6 40.Ra8-+) 39...Rbd3 40.Ke1 (40.Kc2 Ne5 41.Rd4 R3d4 42.ed4 Rc6 43.Rc6 Nc6 44.Kb2 Nd4 45.f4-+) 40...Rd1 41.Kf2 R6d2 42.Kg3 Rg1 43.Kh3 Ng5 44.Kh4 Rh2 0–1. combijack (1790) – mainosaur (1750), gameknot.com, 2015.

5.Nc3 Re8 6.Nf3 Bf8 7.Qc2 d6 8.Bb2 h6 9.Be2 e4 10.Nd4 c5 11.Nb3 Bf5 12.0-0 Bg6 13.Nd5 Nd5= 14.cd5 Qg5 15.Rfc1 Qd5=+ 16.Na5 b6 17.Nc4 Nd7 18.b5 Qg5 19.d3 d5 20.Nd2 ed3 21.Bd3 Bd3 22.Qd3 Ne5 23.Qf1 Qf5 24.Be5 Qe5 25.a4 c4 26.Nf3 Qe4 27.Qd1 Bc5 28.Ra2 a6 29.Rd2 ab5 30.ab5 Ra5 31.Nd4 Rea8 32.Ne2=+ Rd8 33.Nc3 Qe5 34.Nd5 Rda8 35.Nc3 Ra3 36.Rd8 Rd8 37.Qd8 Kh7 38.Ne2?? Ra2?? 39.Kf1 Qb2 40.Qd1-/+ Qb5?? 41.g3?? Qa4 42.Qd5-/+ Ra1 43.Ra1 Qa1 44.Kg2 Qf6 45.Qc4= g6 46.h4 Kg7 47.Nf4 Qb2 48.Nd5 Qe5 49.h5 gh5 50.Nf4 Be7 51.Qe2 b5 52.Nh5= Kf8 53.Qf3 Qd6 54.Qa8 Bd8 55.e4 b4 56.e5 Qb6 57.Nf6 Kg7 58.Ne8 Kf8 59.Nd6 b3? 60.Qd5+– Qc7 61.Qb3 f6 62.Qb5 fe5 63.Qe5 Kg8 64.Qe6 Kh7 65.Qf5 Kh8?? 66.Qg6 Qg7 67.Nf7 (67...Kg8 68.Qg7 Kg7 69.Nd8+–) 1–0. Bulcourf,Carlos (2210) – Juarez,Alberto (2265), Buenos Aires Najdorf qual, 1992.

4.Bb2 d6=.

4.Bb2 Bg7 5.Be5 0-0 6.c4 Nc6 7.Bb2 (7.Bf6 Bf6 8.Nc3 Bc3 9.dc3 Qf6=) 7...d6 (7...d5 8.Nf3=+) 8.Nc3= Bf5 (8...Be6 9.Nf3=) 9.Nf3 Re8 (9...a5 10.b5 Ne5 11.d3+=) 10.Be2 Ne5 11.Ne5 de5 12.0-0 Bd3 13.Bd3 Qd3 14.Qe2 Rad8 15.Rfd1 e4 16.Rab1 Qe2 (16...c6 17.b5+=) 17.Ne2 b6 (17...Ng4 18.Bd4+=) 18.Bf6 (18.Bd4 Ng4+–) 18...Bf6+= 19.Nf4 (19.Rb3 Re6+=) 19...g5 (19...Be5!?=) 20.Nh5 (20.Nd5 Be5 21.d4 ed3 22.Rd3 Kg7+–) 20...Bh8 21.g4 (21.Rb3!?+–) 21...Rd3= 22.a4 Red8 (22...Be5 23.Kg2+=) 23.Ng3+= Rd2 24.Rd2 Rd2 25.Ne4 Rc2 26.c5 Rc4 27.cb6 cb6 28.f3 h6 29.Kf2 (29.Nd6 Rc2+=) 29...Be5 30.Kg1 Kg7 31.a5 Kg6 32.a6 h5 (32...f5 33.gf5 Kf5 34.Rd1=) 33.h3 (33.gh5 Kh5 34.Rd1 Kg6+=) 33...f5 34.Nd2 (34.gf5 Kf5 35.Rd1 g4=) 34...Rc2 (34...Rc3 35.Rb3 b5 36.Kf1=) 35.Nf1 (35.Rd1 hg4 36.fg4 fg4 37.hg4 Bd6+=) 35...Rc4 (35...fg4 36.fg4 hg4 37.hg4=+) 36.gf5 (36.gh5 Kh5 37.Rd1 Rb4=) 36...Kf5= 37.b5 Rc5 (37...Ke6 38.Nd2 Rc3 39.Re1=) 38.Kf2 (38.Rd1 Ke6 39.Rd8 Rb5=) 38...Rc2 39.Kg1 Ke6 (39...Bd6 40.Rd1 Ke6 41.Rd4=) 40.Rb4 Kd5 (40...Rc5 41.Kf2=) 41.h4 g4 (41...Bc3 42.Ra4 Bf6 43.hg5 Bg5 44.Rd4 Kc5 45.Rd7 Kb5 46.Ra7=) 42.fg4+– hg4 43.Rg4 Rc4 44.Rg5 Rh4 45.Nd2 Kd6 46.Nf3 Bf4?? (better 46...Re4+=) 47.Rg6 (47.Nh4? Be3 (47...Bg5?! 48.Nf5 Kc5 49.Kf2-/+) 48.Kg2 Bg5-+; 47.ef4 Rf4 48.Kf2 Re4+–) 47...Kc5 48.ef4 Rf4 49.Rg5 Kb4 (49...Kd6 50.Kf2+–) 50.Ne5 Ka4 (50...Kc3 51.Nc6 Rf7 52.Kg2+–) 51.Nc6 Rf7 52.Re5 Ka3 53.Kg2 Ka4 54.Kg3 Kb3 55.Kg4 Ka3 (55...Kc4 56.Rh5 Kc3 57.Rh3 Kd2 58.Rh6+–) 56.Rf5 Rg7 (56...Rh7 57.Rf6+–) 57.Kf4 Ka4 58.Ke5 Rh7 (58...Kb5 59.Kf6 Kc6 60.Kg7 b5+–) 59.Kd6 Rg7 (59...Kb3 60.Na7! Ra7 61.Kc6+–) 60.Re5 Rh7 61.Ne7 Rg7 62.Kc7 Re7 1–0. combijack (1860) – elmerx25 (1840), gameknot.com, 2018.

4.c4 Bg7 5.Nc3 (5.Bb2 d6=) 5...0-0 (5...Nc6 6.b5 Ne7 7.d4 ed4 8.ed4=) 6.Nf3 (6.e4 a5 7.Bb2 d6=) 6...Re8 (6...e4 7.Nd4=+) 7.Be2 (7.e4 d6=) 7...d5 (7...e4 8.Nd4=+) 8.cd5 (8.d4 ed4 9.Nd4 dc4 10.Bc4 Nbd7=) 8...Nd5 9.Bb2 (9.Nd5 Qd5 10.Bb2 Nc6=) 9...Nc6 (9...e4 10.Nd5 Bb2-+ (10...Qd5 11.Bg7 Kg7 12.Qa4-+; 10...ef3?! 11.Bg7 fe2 12.Nf6 Qf6 13.Bf6 ed1Q 14.Rd1-+)) 10.b5 e4 (10...Nce7 11.d4 Nc3 12.Bc3=) 11.bc6 ef3 12.Bf3 bc6 13.Na4 (13.d4 Rb8 14.Qd2 Be6+=) 13...Bb2= 14.Nb2 Qf6 (14...Rb8 15.Rb1=) 15.Nc4 (15.d4 Rb8 16.Rb1 Nc3-+) 15...Ba6 16.Rc1 Rad8 (16...Qe7 17.d4+=) 17.0-0 (17.Qa4 Bc4 18.Qc4 Nf4+=) 17...Qh4 (17...Nb6 18.Be2+=) 18.g3 (18.d4 c5 19.Qa4 Re6+/–) 18...Qf6 19.Re1 h5 (19...Bc4 20.Rc4 Qd6 21.d4+/–) 20.h4 (20.Na5 Bd3 21.Nc6+– (< 21.Rc6 Qf5+/–)) 20...Re6 21.Bg2 Bc4 22.Rc4 Nb6 23.Rc3 Qc3 24.dc3 Rd1 25.Rd1 c5 26.Rd8 Kg7 27.Rb8 Nc4 28.Rb7 Na3 29.Rc7 c4 30.Bd5 Rf6 31.e4 Nb5+= 32.Rc4 Rf3= 33.Ra4 Rc3 34.Ra5 Rc5 35.Kg2 Kf6 36.Bb3 Ke7 37.Ba4 a6 38.Ra6 Nc7 39.Rb6 Ne6 40.Bb3 Rc7 41.Be6 fe6 42.e5 Kf7 43.Rb4 Kg7 44.f4 Rd7 45.Rb3 Kf7 46.Kf3 Ke7 47.g4 Kf7 48.gh5 gh5+/– 49.Ke4 Rc7 50.Rb4 Ra7 51.f5+– ef5 52.Kf5 Re7 53.Rb6 Kg7 54.Rg6 Kh7 55.e6 Re8 56.Rg5 Kh6 57.Ke5 Rf8 58.e7 (58…Re8 59.Ke6+–) 1–0. Bulcourf,Carlos (2260) – Montoro,Gustavo E, Acasusso Valle op, 1994.

4.d3 a5 5.b5=+.

4.d3 Bg7 5.Bb2 d6 (5...0-0 6.Nf3=+) 6.h3 (6.Nf3 0-0=+) 6...Nc6 (6...0-0 7.Nf3=+) 7.c4 (7.Nd2 0-0=+) 7...a6 (7...0-0 8.Nd2=+) 8.b5 (8.Nf3 0-0=+) 8...ab5 9.cb5 Ne7 10.a4 (10.Nf3 Bd7 11.Nc3 0-0-/+) 10...b6 (10...0-0 11.Nf3-/+) 11.g4 (11.Nf3 0-0=+) 11...Bb7 12.f3? (better 12.Nf3-/+) 12...0-0 (12...Ned5 13.e4 Ne3 14.Qe2 Nf1 15.Kf1-+) 13.g5 (13.Nd2 Nd7 14.h4 f5-+) 13...Nh5 14.Kf2 (14.e4 h6 15.h4-+) 14...Nf5 15.h4 h6 (better 15...d5!? 16.Nd2 f6 17.Nh3 Nh4 18.Rg1-+) 16.e4 Nfg3 17.Rh2 (17.Rh3 Nf1 18.Kf1 hg5 19.hg5 Qg5-+) 17...f6 (17...f5 18.Ke1 fe4 19.de4 Nf1 20.Kf1 Be4 21.Nc3-+) 18.Bc1 (18.gh6 Bh6 19.Ne2 f5 20.Qb3 Kg7 21.Ng3 Ng3-+) 18...fg5 (better 18...hg5 19.Qb3 Kh7 20.hg5 fg5 21.Bg2-+) 19.Ke1 (19.hg5 hg5 20.Bh3-+) 19...g4! 20.Rg2 (20.fg4 Rf1 Double attack (20...Rf1 Pinning; 20...Rf1 Deflection)) 20...Rf3! 21.Nf3 gf3 22.Qf3 (22.Rh2 Nf1 23.Kf1 d5-+) 22...Qh4 23.Kd1 (23.Rf2 Nf1 24.Kf1-+) 23...Rf8 24.Rg3 (24.Be2 Rf3 25.Bf3-+) 24...Rf3 (better 24...Ng3 25.Qg2 Rf1 26.Kc2 Rh1-+) 25.Rf3 Be4! 26.de4 Qe4 27.Nd2 Qd4 28.Raa3 e4 29.Rh3? (29.a5 ba5 30.Rfc3-+) 29...Nf4 (29...d5 30.Rab3-+) 30.Rhg3 (30.Rhe3 d5 31.Kc2 Qb4-+) 30...g5 (better 30...Qf2 31.Rge3 d5 32.Re1-+) 31.Kc2 (31.Ke1 Qc5 32.Nb3 Qc2-+) 31...Be5 (31...Qf2!? 32.Rae3-+) 32.Kb1?! (32.Rge3 d5 33.a5 ba5 34.Nb3-+) 32...Qb4 (better 32...d5 33.Rge3 g4-+) 33.Nb3?? (better 33.Rgb3 Qc5 34.Ne4=+) 33...Nd3-+ 34.Bd3 (34.Rd3 ed3 35.Bd3 g4-+) 34...Bg3 (34...ed3?! 35.Rd3 h5 36.Bb2-+) 35.Bd2 (35.Be2 d5 36.Kc2-+) 35...Qa3 36.Bc4 Kf8 37.Nd4 Qa4 38.Ne6 Ke7 39.Bd5 Be5 40.Kc1 Qa1 41.Kc2 Qb2 42.Kd1 g4 (42...Qb1 43.Ke2 Qd3 44.Ke1 Bg3 45.Kd1 e3 46.Kc1 Qd2 47.Kb1 e2 48.Bf3 e1Q 49.Bd1 Qed1) 43.Nc7 g3 (43...Qb1 44.Ke2 Qd3 45.Ke1 Bg3 46.Kd1 e3 47.Kc1 Qd2 48.Kb1 Be5 49.Ne6 Qb2) 44.Be4-+ h5 (better 44...Qd4 45.Nd5 Ke6 46.Bf3-+) 45.Nd5 Kd8 46.Nb6 (46.Be3-+) 46...Qb5 47.Bg5 Kc7 (47...Ke8 48.Be3-+) 48.Nd5 Kb8 49.Be7 Qa4 50.Ke2 (50.Kc1 Qe4 51.Bd6 Bd6 52.Nc3 Qe1 53.Kc2 g2 54.Nb1 g1Q 55.Nd2 Qd4 56.Kb3 Qc1 57.Nc4 Qcc4) 50…Qe4 (50...Qe4 51.Ne3 g2 52.Bg5 g1Q 53.Kd2 Qf2 54.Kc1 Bc3 55.Bf6 Qd2) 0–1. pumpkin516 – dpwarren, gameknot.com, 2015.

4.e3 d6 5.g4? (5.Bb2=+) 5...b5?? (better 5...Ng4 6.Ke2 Nf6-+) 6.h4 (6.Bb5 Bd7 7.Nc3 a5=) 6...Be7 (6...a6 7.Nc3-/+) 7.h5 (7.Bb5!? Bb7 8.Nc3=) 7...h6 8.Bb5 Bd7 9.c4 (9.Be2 0-0=+) 9...0-0 (9...a5!? 10.Bc6 Bc6 11.b5 Ng4 12.Qe2-/+ (12.bc6? Bh4 13.Ke2 Nf2-+)) 10.Ba4-/+ e4 11.d3? (11.Bb2 ef3 12.Nf3 Ng4=+) 11...ef3?? (11...ed3 12.Qd3 Ne5 13.Qc2 Ba4 14.Qa4-+) 12.Bc6? (better 12.Nf3!? Ng4 13.Nc3-/+) 12...Bc6 (better 12...f2 13.Kf2 Bc6-+) 13.b5?? (13.Nf3 Ng4 14.b5 Bb7-+) 13...Bb7 (13...f2 14.Kf1 Bh1 15.Nh3-+) 14.a4?? (14.Nf3 d5 15.cd5 Qd5 16.Rh3-+) 14...Ng4 (better 14...f2 15.Ke2 Bh1-+) 15.Nf3 f5 (better 15...d5 16.Rg1 f5-+) 16.Kd2?? (16.Nc3 Bg5 17.Nd5 Bd5 18.cd5 Be3-+) 16...Bg5 (better 16...Nf2 17.Qf1 Bf3-+) 17.Ng5 Qg5 18.Kc2 (18.Rg1 d5 19.Kc2 dc4 20.dc4 Rad8-+) 18...Bh1 (better 18...Qf6 19.Nc3 Nf2 20.Qg1 Nh1 21.Bd2-+) 19.Qh1 Nf2 (19...Rae8!? 20.Nc3 Ne3 21.Be3 Qe3 22.Rf1-+) 20.Qd5 (20.Qh2!? Qf6 21.Bb2 Ng4 22.Bf6 Nh2-+) 20...Kh8 21.Bb2 (21.Nc3 Qh5 22.Bd2 Ng4-+) 21...Rae8 (better 21...Ng4 22.Bd4 Ne3 23.Be3 Qe3-+) 22.Qb7?? (better 22.Bd4-+) 22...Qe3 23.Nd2 (23.Qd5 Qe2 24.Nd2-+) 23...Qd3 24.Kc1 Re1 0-1. Paul593 – Sjo, ChessWorld.net, 2009.

4.e4 Ne4 5.Ne2 Nf6-/+.

5.c3 e4 6.h3 (6.d4 ed3 7.Bd3 Bd6=+) 6...ef3 (6...Nh5 7.d4-+) 7.Qf3 (7.Nf3 Bd6-/+) 7...Be7 (7...Ne4 8.Bb5 Qh4 9.g3 Ng3 10.Rh2 Ne4 11.Kd1-+) 8.d3-/+ 0-0 9.Bb2 Ne5 10.Qe2 (10.Qf2 Bd6-/+) 10...Bf5 11.Qd2 (11.Qd1 Bd6-/+) 11...b6 (11...Nh5 12.Nf3 Ng3 13.Ne5 Nh1 14.g4 Bh4 15.Kd1-+) 12.a4? (better 12.c4 Ng6 13.g4=+) 12...Nh5-+ 13.c4 Nc6 (better 13...Bh4 14.Kd1 Ng3 15.Be5 Nh1-+ (worse 15...Nf1 16.Qe2 Ng3 17.Bg3 Bg3 18.c5-+)) 14.c5?? (better 14.cd5 Bh4 15.Kd1-+) 14...Bh4-+ (14...bc5?! 15.g4 Ng3 16.gf5 Nh1 17.bc5-+) 15.Kd1 Ng3 16.Qf2 Nh1 (16...Nb4!? 17.Be5 Nf1 18.Qf1 Nd3 19.Qf5 Nf2 20.Kd2 Nh1 21.Nc3-+) 17.Qf5 Nf2 18.Kc2 (18.Kd2 d4 (18...Nb4 19.Qf4 bc5 20.g3 Ne4 21.de4-+) 19.e4 g6-+) 18...Nb4 19.Kd2 bc5 20.Nf3 Ne4 (20...Bg3 21.Bc3-+) 21.de4 de4 22.Nd4 (22.Kc1 ef3 23.gf3-+) 22...cd4 23.ed4 Bg5 24.Kc3 (24.Kd1 Nd5 25.Ke1-+) 24...Nd5 25.Kb3 Rb8 26.Ka3 (26.Bb5 a6 27.Nc3 Nc3 28.Bc3 ab5 29.ab5-+) 26...Qd6 27.Ka2 Nb4 (27...Qb4 28.Qh7 Kh7 29.Bb5 Rb5 30.ab5 Qc4 31.Ka3 Be7) 28.Kb3 Nd3 29.Kc2 Rb2 30.Kd1 Nf2 (30...Nf2 31.Qf2 Rf2 32.Ra2 Rf1 33.Kc2 Rc1 34.Kb2 Rb8 35.Ka1 Rcb1; 30...Qg3 31.Qh7 Kh7 32.Bd3 Qd3 33.Ke1 Qe2) 0-1. Delboy Smith (1725) - Harry Maitland (1620), ChessWorld.net, 2009.

5.Nc3 Bd6 6.Bb5 0-0 7.g4 e4 (7...a5 8.Bc6 bc6 9.ba5 Ra5 10.Nge2-/+) 8.h3 (8.g5 Ne8 9.fe4= (9.Nd5? Qg5 10.fe4 Qh4 11.Kf1 Qe4-+)) 8...ef3 9.Qf3 d4 10.Ne4? (better is 10.Bc6 dc3 11.Bb7 Bb7 12.Qb7 cd2 13.Bd2+=) 10...de3?? (better is 10...Ne4 11.Qe4 Re8-+) 11.de3?? (11.Nf6 Qf6 12.Qf6 ed2 13.Bd2 gf6=) 11...Be6?? 12.Bb2?? Be5 13.Be5 Ne5 14.Qe2?? Bd5 15.Nf6 Qf6 16.0-0-0 Bh1 17.Qc4 Nc4 18.Bc4 Qa1 19.Kd2 Qe5 20.Ne2 Rad8 21.Nd4 Qh2 22.Kc3 Qh3 23.Rd3 Qg4 24.a4 Be4 25.Rd2 Qg3 26.Re2 Qe5 27.Rd2 c5 28.bc5 Qc5 29.Kb3 Qb6 30.Kc3 Qa5 31.Kb2 Qa4 32.c3 Qc4 33.Re2 Rd4! 34.ed4 Qe2 (34...Qe2 35.Kb3 Bd5 36.c4 Qc4 37.Kb2 Rc8 38.Kb1 Qc1) 0–1. pjc49 – interloper, ChessWorld.net, 2011.

5.ed5!? Nd5 6.Bb5=+.

5.g4?? de4 (5...Ne4 6.h4 Be7 7.g5-+) 6.fe4? (better 6.g5 ef3 7.Nf3-+) 6...Bg4 7.Be2 (7.Nf3 Nd4 8.Bg2 Ne4-+) 7...Qd4 (7...Ne4!? 8.Kf1 Qd4 9.Qe1 Be2 10.Ne2 Qa1 11.Nbc3 Nc3 12.Nc3-+) 8.c3 (8.Bb2 Qe4 9.Nf3 Bf3-+) 8...Qe4 9.Nf3 Bf3 10.Rf1 (10.Rg1 Qh4 11.Rg3 Bh1-+) 10...Be2 (better 10...Qh4 11.Rf2 Ne4 12.Qb3 Qf2 13.Kd1 Qe2 14.Kc2-+) 11.d3 (11.Qe2 Qh4 12.Qf2 Qf2 13.Rf2-+) 11...Qh4 (better 11...Bd3 12.Kf2 Qf5 13.Kg2 Qg6 14.Kh1 0-0-0-+) 12.Rf2 0-1. marcton73609178 - greg75, Rated Classical game, lichess.org, 2014. (=1.a3 A00: Irregular Openings 1...e5 2.b4 Nf6)

4.Bb2 d4 5.c3 (5.e3 Be6=+) 5...dc3 6.dc3 (6.Nc3 Be6=+) 6...Qd1-/+ 7.Kd1 Bd6 8.c4 0-0 (8...Nc6!?=+) 9.c5= Be7 10.Be5 Na6 (10...Nc6 11.Bc3= (11.Bc7? Nd5-+)) 11.g4 (11.e4 b6+/-) 11...Re8 (11...Rd8 12.Nd2 Bg4 13.fg4 Ng4+/-) 12.e4+/- Bd7? (better 12...Nd7!? 13.Bf4 Ndb8+/-) 13.Nc3 (13.Ba6 ba6 14.Bc7 Rac8+-) 13...Red8 (13...Rac8 14.Ba6 ba6 15.Nge2+-) 14.Kc2 (better 14.Ba6 Be6 15.Kc2 ba6 16.Bc7+-) 14...b6?? (14...Rac8 15.Ba6 ba6 16.Nge2+-) 15.Rb1 (15.Ba6!? bc5 16.Bc7 cb4 17.ab4 Bb4 18.Bd8 Rd8+-) 15...bc5? (15...Nc5 16.bc5 Ne8 17.cb6 ab6+-) 16.bc5 (better 16.Ba6 Be6 17.bc5 Bc5 18.Bb7+-) 16...Nc5+= 17.Bc4 (17.Bc7 Rdc8 18.Be5 Bc6 19.Bf6 Bf6-/+) 17...Na4 18.Na4 (18.Rb7 Ne8=) 18...Ba4 19.Bb3 Bb5 (better 19...Bc6 20.Bf6 Bf6=) 20.Bc7?? (better 20.Bf7!? Kf7 21.Rb5 Ba3 22.Rb7+=) 20...Bd3?? (better 20...Rac8 21.Bf7 Kf7 22.Rb5 Rc7 23.Kb1 Rd1 (23...Ba3?! 24.Nh3-+) 24.Ka2 Rcc1-+) 21.Kc1?? (better 21.Kb2 Bb1 22.Bd8 Rd8 23.Kb1 Ba3 24.g5=+) 21...Rac8 (better 21...Ba3 22.Kd2 Bb1 23.Bd8 Rd8 24.Ke2 Ne4 25.fe4 Be4 26.Nf3 Bf3 27.Kf3 Rd3 28.Ke4 Rb3 29.Rd1-+) 22.Kd2 (22.Kb2 Rc7 23.Rd1 Ne4 24.fe4 Be4 25.Rd8 Bd8-+) 22...Rc7 23.Rc1 (23.Rd1 Ne4! 24.fe4 Be4 25.Ke2 Rc3 26.Rd8 Bd8-+) 23...Bc4 (better 23...Be4 24.Ke3 Rc1 25.fe4 Rc3 26.Ke2 Rb3-+) 24.Kc3 (24.Ke1 Ne4 25.Bc4 Bh4 26.Kf1-+) 24...Bb3 25.Kb2 0-1. DatDoodZ - Dusan27, Rated Classical game, lichess.org, 2014.

4.Bb2 Bd6 5.e3 (5.Nc3 d4 6.Nb5 Be7 7.f4 a6 8.fe5 Ne4-+) 5...a5 6.Nc3 ab4 7.ab4 Ra1 8.Qa1 Nc6-/+.

4.d3 a5 5.ba5 (5.b5 Bc5 6.e3 d4 7.e4 Bd7 8.c4 dc3-/+) 5...Bc5 6.e4 Be6 7.Be2 0-0 8.c3 d4-/+.

4.d3 c5 5.Qd2 (5.Bd2 Qb6 6.c3 a5 7.f4 ef4 8.Bf4 ab4-+; 5.c3 cb4 6.ab4 d4 7.Bd2 dc3 8.Bc3 Nd5-/+) 5...Be6 6.e3 Qb6 7.bc5 Bc5 8.Ne2 0-0-/+.

4.d3 Bd6 5.e4 (5.c4 a5 6.Qa4 Bd7 7.b5 d4 8.e3 0-0-/+; 5.Bg5 h6 6.Bh4 a5 7.b5 d4 8.c3 Bd7-/+; 5.Bd2 Be6 6.Bg5 h6 7.Bh4 a5 8.b5 d4-/+) 5...de4 (5...a5 6.b5 0-0 7.Bg5 d4 8.Ne2 h6-/+) 6.de4 Nc6 (6...a5 7.b5 0-0 8.Be3 Qe7+=) 7.c3 (7.Bc4 0-0 8.Be3 Qe7+=) 7...Be6 (7...a6 8.Be3 0-0+=) 8.Be3 (8.Bb5 a5+=) 8...0-0 9.Bg5 Ne7 (9...Be7!?-/+) 10.Bf6= gf6 11.Qd2 (11.Nd2 a5=) 11...Ng6 12.g3 Bb3 13.h4 Qe7 (13...a5 14.h5 Ne7 15.Qh6 ab4 16.Rh4-/+) 14.Qh6 (14.c4 Qe6+=) 14...Qe6 (better is 14...Rfd8!?=) 15.h5 Ne7 16.Bh3 Qc4? (better is 16...f5 17.Qg5 Kh8 18.ef5 f6 19.fe6 fg5+/–) 17.Nd2?? (better is 17.Qf6!? h6 18.Qh6+–) 17...Qd3?? (17...Qc3 18.Rb1 Ba2-/+) 18.Nb3 (better is 18.Ne2 Ba4 19.Qf6+–) 18...Qc2?? (18...Qc3 19.Kf2 Qb3 20.Qf6 h6 21.Qh6 a5 22.Qg5 Kh7 23.Bf5 Nf5 24.Qf5 Kh8+/–) 19.Nd2 Qc3 20.Rd1 Qe3 (20...Qa3 21.Qf6 Qe3 22.Kf1 h6+–) 21.Qe3 1–0. catzlaw – pulaster, gameknot.com, 2012. (=1.a3 e5 2.b4 Nf6 3.f3 d5)

4.d3 Be6 5.h4 Nh5 6.g3 Ng3 7.Rh2 Be7 8.Bg5 Bg5 9.hg5 Qg5 10.Nh3 Qh4 11.Kd2 Nc6 12.c3 d4 13.Bg2 dc3 14.Nc3 Nd4 15.Qa4 c6 16.b5 Qh6 17.e3 0-0 18.Ne4 Ne4 19.de4 Nb3 20.Ke2 Na1 21.bc6 b6 22.Rh1 Nb3 23.Qb4 Nc5 24.Qc3 Rac8 25.Nf4 Qg5 26.Nh3 Qg2 27.Kd1 Qh1 28.Ke2 Qh3 29.Qe5 Rc6 30.Kf2 Nd3 Time forfeit 0-1. Guilhem – fernoty, Rated Classical game, lichess.org, 2015.

4.d4 Nc6 5.de5 Ne5 6.g4 Bd6 (6...h6 7.Bf4 Bd6 8.Qd4-/+) 7.c3 (7.g5 Ng8=+) 7...0-0 (7...h6!?-/+) 8.g5=+ Nh5 9.e4 (9.Qd5 Ng6 10.Qd4 Nhf4-/+) 9...de4-/+ 10.fe4 Bg4 11.Be2 Be2 12.Qe2 (12.Ne2 Qd7 13.Ng1 Qc6-+) 12...g6 (12...Be7 13.Qh5 Nd3 14.Kf1 Nc1 15.Qf3-+) 13.Bd2 (13.Nf3 Qe7=+) 13...f6 14.gf6 (14.Nf3 Nf3 15.Qf3 fg5-/+) 14...Qf6 (14...Rf6?! 15.Bg5=+) 15.Bh6? (15.Kd1!?-/+) 15...Rf7 (15...Qh4!? 16.Kd1 Ng3 17.hg3 Qh1 18.Be3 Qe4 19.Nd2-+) 16.Nd2 (16.Kd1 Qh4 17.Bd2 Ng3-+) 16...Qh4 17.Kd1 Ng3! 18.Qe1?? (18.hg3 Exploits the pin 18...Qh1 A pinning theme) 18...Qh6 (better 18...Qh5 19.Ngf3 Nh1 20.Qh1 Qh6 21.Ke2-+) 19.Qg3 Nc4!! 20.Qe1 (20.Nc4 Bg3 Annihilates a defender: g3) 20...Nd2 21.Qd2 (21.Kc2 Rf1 22.Qf1 Nf1 23.Rf1 Qe3-+) 21...Rf1 22.Kc2 Rf2 (better 22...Qd2 23.Kd2 Ra1-+) 23.Qf2+- Rf8 (23...a5 24.Nf3+-) 24.Qa7 b5 (24...Qg5 25.Ne2 Qg2 26.Qe3+-) 25.h4 (25.Ne2 Qh4 26.Qb7 Re8+-) 25...Qf4 (25...c5 26.Re1+- (26.bc5 Rf2 27.Kb3 Qd2 28.Qa8 Kg7 29.Qb7 Kh6=+)) 26.Qd4 Be5 (26...Qg4 27.Re1 Bg3 28.Qd5 Kg7 29.Re2+-) 27.Qd5 Kg7 28.Ne2 Qf6 29.Qb5 Rd8 (29...Qe7 30.h5+-) 30.Raf1 (30.Rad1!? Rd1 31.Rd1 Bd6+-) 30...Qe6 31.c4 (better 31.Kb2 Bf6 32.Rd1 Rd1 33.Rd1 Qe4 34.Rd7 Kh6 35.Rc7+-) 31...Qg4 (31...Bf6 32.e5 Be5+-) 32.Qe5 Kg8 33.Nf4 c6 34.Qe6 (34.h5 Qd7 35.hg6 h6 36.Rh6 Qd2 37.Kb1 Qa2 38.Ka2 Rd2 39.Kb3 Rb2 40.Kb2 Kf8 41.Rh8) 34...Qe6 35.Ne6 Re8 36.Nc5 (better 36.Rf6!? Kh8+-) 36...Ra8 37.a4 h5 38.Rf6 Kg7 39.Rc6 (39.Rc6 Kh6 40.Rg1+-) 1-0. Delboy Smith – Naidoo, ChessWorld.net, 2009.

4.e3 c5 5.c3 cb4 6.cb4 Nc6 7.Qc2 Be6 8.Bb5 Rc8 9.Nc3 Be7 10.d4 0-0 11.h3 ed4 12.ed4 Nd4 13.Qa4 Rc3 14.Ne2 a6 15.Nc3 ab5 16.Nb5 Nc6 17.g4 Qb6 18.Bg5 h6 19.Bf4 g5 20.Bd2 d4 21.Kf2 Bd7 22.Rhe1 d3 23.Be3 Nd4 24.Nd4 Ba4 25.Nf5 Qc7 26.Nh6 Kh7 27.Nf5 Rd8 28.Bg5 Qc2 29.Kg3 Bd6 30.Kh4 Qf2 31.Ng3 Qg3 0-1. cherepuxini – banifadze, Rated Blitz game, lichess.org.

4.e3 Bd6 5.d4 (5.Nc3 0-0-/+) 5...0-0 6.c4 (6.Ne2 Nc6-+) 6...dc4 (6...ed4 7.c5 Be7 8.ed4-+) 7.Bc4 ed4 8.Qd4 (8.Ne2 de3 9.Be3 Nc6-+) 8...Nc6 9.Qc3?? (9.Qh4 Be7 10.Qf4-+) 9...Be5 10.Qb3 Ba1 11.b5 (11.Qa2 Nd7-+) 11...Na5 12.Bf7 (12.Qc2 Nc4 13.Qc4 Be6-+) 12...Rf7 13.Qd1 (13.Qa2 Be5 14.Qd2 Bf5 15.Qa5 Bb1-+) 13...Rd7 (13...Be6!? 14.Qd8 Rd8 15.Nd2-+) 14.Bd2 (14.Qc2 c6 15.bc6 bc6-+) 14...Nc4 (better 14...a6 15.Qc2 ab5 16.Ba5 Ra5 17.Ne2-+) 15.Qb3 Qe7 (better 15...Rd2 16.Qc4 Rd5 17.e4-+) 16.Qc4 Kh8 17.Bc3 (17.Ne2 a6 18.0-0-+) 17...Bc3 18.Nc3 (18.Qc3 Nd5 19.Qd4 Ne3-+) 18...Qe3 19.Nge2 a6 (19...Rd3 20.Nd1 Qd2 21.Kf2-+) 20.Qb4 (20.b6 Rd3 21.bc7 Be6-+) 20...ab5 (better 20...Re7 21.Qb2 ab5 22.Nd1-+) 21.g4 (21.Qf8 Ng8 22.Qb4 Re7-+) 21...Rd3 (better 21...Re7 22.Qb2 Bd7 23.Nd1 Qf3 24.Rf1 Qg4 25.Rf6 gf6 26.Qf6 Qg7 27.Qg7 Kg7 28.Kd2-+) 22.Rf1 (22.Nd1 Qe8 23.Ndc3 Rf3-+) 22...c5 (better 22...Be6 23.Qf4 Rc3 24.Qe3 Re3 25.Kf2 Raa3 26.Ng1-+) 23.Qf4 Rc3 24.Qe3 Re3 25.h4 Be6 26.g5 Nd5 (better 26...Bc4 27.Rf2 Nd5-+) 27.f4 Raa3 (27...Nc3 28.Kf2 Re2 29.Kg1 Ra3 30.Rf2 Ra1 31.Kg2 Bd5 32.Kg3 Ne4 33.Kf3 Rf2 34.Kg4 Be6 35.f5 Bf5 36.Kh5 Ng3) 28.h5 Nc3 29.Rf2 Ne2 (29...Ne4 30.Kd1 Nf2 31.Ke1 Ne4 32.Kf1 Bh3 33.Kg1 Re2 34.f5 Ra1) 30.Kf1 Bh3 (30...Ra1 31.Kg2 Rg1 32.Kh2 Rh3) 31.Ke1 Nf4 (31...Ra2 32.Rg2 Nf4 33.Kf1 Ree2 34.Kg1 Ra1 35.Kh2 Rg2) 32.Kd2 Red3 33.Kc1 Ra4 (33...Rdc3 34.Rc2 Ra1 35.Kb2 Rca3 36.Rf2 Nd3 37.Kc2 R1a2 38.Kb1 Rf2 39.g6 Rb2) 34.h6 gh6 35.Rc2 (35.g6 hg6 36.Kb2 c4 37.Kc1 Rc3 38.Kd2 Rg3 39.Kc1 Nd3 40.Kb1 Nf2 41.Kb2 Nd1 42.Kc2 Rg2 43.Kb1 Kg7 44.Kc1 Ra1) 35...c4 36.g6 hg6 37.Kb1 (37.Rf2 Rc3 38.Kd2 Rg3 39.Kc1 Nd3 40.Kb1 Nf2 41.Kb2 Nd1 42.Kc2 Rg2 43.Kb1 Kg7 44.Kc1 Ra1) 37...Nd5 (37...Rb3 38.Rb2 Bf5 39.Kc1 c3 40.Rb3 Ra1 41.Rb1 Rb1) 38.Kc1 (38.Ra2 Rb3 39.Rb2 c3 40.Rb3 Bf5 41.Kc1 Ra1 42.Rb1 Rb1) 38...Bf5 39.Kb2 (39.Rb2 Ra1 40.Rb1 Rc3 41.Kd1 Rb1 42.Ke2 Rc2 43.Kf3 Rb3) 39...Rb3 (39...Rd1 40.Rc1 Rd2 41.Rc2 Rc2 42.Kb1 Nc3) 40.Kc1 Bc2 41.Kd2 Be4 42.Ke2 (42.Kd1 Ra2 43.Kc1 Rb1) 42...Ra2 43.Kf1 (43.Kd1 Rb1) 43…Rb1 0-1. Paul593 - Larry Larry (1835), ChessWorld.net, 2015.

5.Nc3 a5 6.b5 Bd6 7.e4 d4 8.Na4 0-0–/+.

5.e3 a5 6.b5 Bd6 7.d4 0-0 8.de5 Ne5–/+.

5.e4-/+.

4.Bg2 a6 5.e3 (5.Bb2 Bd6=+) 5...Nc6 (5...a5 6.b5=+) 6.Ne2=+ Be7 7.Bb2 Bg4 8.0-0 0-0 9.h3 Bh5 (9...Be6 10.f4 e4 11.Nbc3=) 10.g4 Bg6 11.d4 (11.d3 Bd6=) 11...e4 12.c4 (12.Nf4 Bd6=) 12...dc4=+ 13.Nbc3 Re8 (better 13...Bd6!?=+) 14.Nf4+= Qd7 (14...Bd6 15.Ng6 hg6 16.Qc2=) 15.Ng6 (15.g5!? Nh5 16.Nh5 Bg5 17.Qe2+/-) 15...hg6 16.Ne4 Ne4 17.Be4 Bb4? (better 17...a5 18.b5 Nd8+=) 18.Bc6+- Qc6 19.ab4 c3 (19...Rad8 20.Ra5+-) 20.Rc1 Qe4 21.Bc3 c6 22.Qc2 Qf3 23.Qd1 (better 23.Kh2!? Re7+-) 23...Qh3?? (23...Qe4 24.Re1 Rad8+-) 24.Qe2 (better 24.Re1!?+-) 24...Re4+/- 25.f3 Qg3 (25...Re3!? 26.Qg2 Qh4+/-) 26.Qg2+- Qg2 27.Kg2 Re3 28.Bd2 (28.Kf2 Rae8+-) 28...Re2 (28...Rd3!? 29.Rfd1 Rd4+/-) 29.Rf2 Rae8 30.Bf4 f6 31.Rc2 Re1 32.Bg3 g5 33.Rfd2 Rb1 34.Rb2 Rc1 (34...Rb2 35.Rb2 Rd8 36.Rd2+/-) 35.d5+- Kf7 36.d6 Rd8 37.Rd4 (better 37.Rb3 Rd7 38.Re3+-) 37...g6? (37...Rd7 38.Re4 f5 39.gf5+-) 38.Rbd2 (38.d7 c5 39.bc5 Rc5 40.Rb7 Rc2 41.Kf1 Ke6 42.Re4 Kf7+-) 38...f5 (38...Rd7+-) 39.gf5 gf5 40.d7 f4 41.Bf2 Ra1 (41...c5 42.Rd5 b6+-) 42.Re4 Ra4 43.Bb6 (43.Bb6 Ra2 44.Ra2 Rd7 45.Kh3+-) 1-0. RiverOk (1715) - jabeb (1675), Rated Blitz game, lichess.org, 2014.

4.Bg2 c6 5.Nf3 Bd6 6.0-0 0-0 7.Bb2 Re8 8.d3 Bg4 9.Nbd2 Qd7 10.c4 Bh3 11.c5 Bc7 Black prepares the advance d4 12.e4 d4 13.Nc4 Bg2 14.Kg2 b6 15.cb6 ab6 16.Nh4 b5 17.Nd2 Ng4 (17...Na6 18.Rc1+=) 18.h3 Nh6 19.Nb3 f5 (19...Qd6 20.f4=) 20.Nc5 Qc8 (20...Qf7 21.Bc1 f4 22.Nf3=) 21.Qb3 Kh8 22.Qf7?? (better is 22.Bc1 Bd8 23.Bh6 Bh4 24.gh4 gh6 25.Qf7+=) 22...Nf7-+ 23.Nf5 Nd7 24.Ne6 (24.Nb3 Qa6-+) 24...Re6 25.f4 ef4 (better is 25...Qd8 26.Rac1-+) 26.Rf4 g6 (26...Bf4 27.gf4 Rg6 28.Kh2-+) 27.Nh4 (27.Nd4 Bf4 28.Ne6 Be5-+) 27...Bf4 28.gf4 c5 29.bc5 Qc5 30.Rc1 Qc1! 31.Bc1 Rc8 (better is 31...Rc6 32.Bd2 Ra3 33.Nf3-+) 32.Bb2 Rc2 33.Kf3 Rb2 34.f5 gf5 35.Nf5 Rf6 36.Kg4 (36.Kf4 Nfe5 37.a4 ba4 38.Kg5 Rg6 39.Kh4 Nf3 40.Kh5 Nf6) 36...Nde5 (36...Rg6 37.Kh4 Nde5 38.Nd4 Rg5 39.Nb5 Nf3) 37.Kf4 Rf2 (37...Re2 38.Kg3 Rg6 39.Kh4 Nf3 40.Kh5 Rg5) 38.Kg3-+ Rf3 39.Kg2 Rd3 40.h4 Ra3 41.h5 Rf5! 42.ef5 d3 43.Kf2 d2 44.Ke2 Nc4 45.f6 Re3 46.Kf2 d1Q 47.h6 Qd2 48.Kf1 Re1 0–1. golfx – radekstos, internet, 2012. (=1.a3 e5 2.b4 Nf6 3.g3 d5)

4.Bg2 Nc6 5.c3 Bf5 6.d3 Bd6 7.Nd2 0-0 8.Ngf3 h6 9.0-0 a5 10.Bb2 ab4 11.ab4 Qd7 12.Qc2 b6 (12...Rfe8 13.b5 Na5 14.e4=) 13.Qb3 (13.b5 Na5=) 13...Be6 14.Qc2 Bh3 (14...b5 15.Rfe1+=) 15.Rfd1 (15.Bh3 Qh3 16.b5 Ne7=) 15...Bg2 16.Kg2 Qg4 17.h3 Qh5 18.e4 de4 19.Ne4 Ne4 20.de4 Ne7 21.Qb3 Kh7 22.c4 f5 23.Rac1 (better is 23.Ra8 Ra8 A) worse is 24.Be5 fe4 25.Bd6 Qf3 (worse is 25...cd6 26.Nd2+/–) 26.Qf3 ef3 27.Kf3 cd6+=; B) 24.Ne5?! fe4 25.Qe3 Ra2 (25...Qd1? 26.Qe4 Kg8 27.Qa8 Kh7 28.Qe4 Kh8 29.Ng6 Ng6 30.Qg6+–; worse is 25...Be5 26.Qe4 Ng6 27.g4+/–; 25...Bb4?? 26.Qe4 Nf5 27.g4+–) 26.Qe4 Qf5 27.Qf5 Nf5=; C) 24.Qd3 Bb4 25.Ne5=) 23...fe4-/+ 24.Ng1 Nf5 25.c5 bc5 26.bc5 Rab8 (26...Rfb8 27.Qc2 Ra2 28.Qe4 Rbb2-+ (28...Rab2?! 29.g4 Qg6 30.Qf5 Qf5 31.gf5+=)) 27.Qc3 Bc5 28.Qe5?? (28.Qc5 Rb2 Deflection (28...Rb2 Overloading)) 28...Bd6 29.Qc3 e3! 30.g4 (30.fe3 Qg5 Double attack (30...Bg3 Deflection; 30...Qg5 Decoy)) 30...Nh4 31.Kf1 (31.Kh1 Qg6 32.f3 Nf3 33.Ba3-+) 31...Rf2 32.Ke1 Ng2 0–1. golfx – gunarsp, internet, 2012. (=1.a3 Nf6 2.b4 e5 3.g3 d5)

4.Bg2 Be6 5.c3 Bd6 (5...Nc6 6.Nf3-/+) 6.d3 0-0 (6...a5 7.Bb2-/+) 7.Bb2 (7.Nf3 Nc6-/+) 7...Nc6 (7...e4 8.de4 de4 9.Nh3-/+) 8.Nf3 (8.Nd2-/+) 8...Re8 (8...e4 9.de4 de4 10.Nd4-/+) 9.0-0=+ Ne7 (9...h6 10.Nbd2 e4 11.de4 de4 12.Ne1=+) 10.Qc2 (10.c4 dc4 11.dc4 Bc4=) 10...Ng6 (better 10...h6=) 11.d4? (better 11.c4!?=) 11...e4-/+ 12.Ng5 (better 12.Nfd2!?-/+) 12...Bf5-+ 13.f3 Qc8 (better 13...ef3 14.Qf5 fg2-+) 14.fe4= de4? (better 14...Ne4 15.Rf5 Qf5 16.Ne4 Bf4-/+ (16...de4?! 17.Nd2=)) 15.h3?? (better 15.Nd2+–) 15...Bg3-+ 16.e3 (16.Qb3 Re7 17.c4-+) 16...h6 17.Nf7 Kf7 18.Nd2 Bh3 (18...Nh4 19.Ne4 Kf8 20.c4-+) 19.Ne4 (19.Be4 Nh4 20.Bd5 Ke7 21.Rf6 Kf6-+) 19...Bg2 20.Kg2 (20.Qg2 Nh4 21.Qg3 Re4-+) 20...Bh4 (better 20...Nh4 21.Kg3 Qg4 (21...Re4? 22.Qe4 Ng6 23.Qf5+–) 22.Kh2 Re4-+) 21.c4 (21.Nf6 Bf6 22.Qe2-+) 21...Qg4 (21...Re4?! 22.Qe4 Bg5 23.Kh2-+) 22.Kh1 Re4 23.d5 Qh3 (23...Re3 24.Qh2 Rh3 25.Be5 Ne5 26.Ra2 Nf3 27.Rf3 Qf3 28.Kg1 Re8 29.Qc7 Kg8 30.Qg7 Kg7 31.Rg2 Kh8 32.d6 Re1) 24.Qh2 Qh2 (better 24...Qe3 25.Rad1 Bg3 26.Bc1-+) 25.Kh2 Ke7 (25...Re3 26.Bd4 Rd3 27.Bc5-+) 26.Rac1 (26.Bd4 Ng4 27.Kh1 Ne3 28.Bc5 Ke8-+) 26...Ng4 27.Kg1 (27.Kg2 Re8 28.Bd4 Ne3 29.Be3 Re3-+) 27...Ne3 28.Rf3 Rg4 (better 28...Rf8 29.Rh3 Nf4 30.Rh2-+) 29.Kh2 (29.Kh1 Nc4 30.d6 cd6 31.Bg7-+) 29...Re4 30.Bg7?? (30.Kg1 Rf8 31.Rf8 Kf8 32.Rf1 Nf1 33.Kf1 Re1 34.Kg2 Re2 35.Kf3 Rb2 36.Ke4-+) 30...Ng4-+ 31.Kh3 Rg8 32.Bb2 Nf2 33.Kh2 Nf4 34.Rf4 Rf4 35.Rg1 Rg1 (35...Ng4 36.Kh3 Rf3 37.Kh4 Nf2 38.Rh1 Nh1 39.d6 cd6 40.Bg7 Rg7 41.c5 Nf2 42.cd6 Kd6 43.a4 Rh3) 36.Kg1 Rg4 37.Kf1 Rc4 38.Kg2 Rc2 39.Bd4 Ne4 40.Kf3 Ng5 41.Kg4 Bf2 (better 41...Rc4 42.d6 cd6 43.Kh4 Rd4 44.Kg3 Rd3 45.Kf2 Ra3 46.b5 Rf3 47.Kg2-+) 42.Bf2 Rf2 (42...Rf2 43.d6 cd6 44.b5 Kf6 45.Kg3 Ne4 46.Kg4 h5 47.Kh3 Ke5 48.a4 Kf4 49.a5 Ng5 50.Kh4 Rh2) 0–1. Benreguia,Frederic – Davis,Mark, FICGS, 2012.

4.Bg2 Be7 5.Nc3 0-0 6.d3 d4 7.Ne4 Ne4 8.Be4 Nd7 (8...c6 9.Bd2-/+) 9.Bb2 Nf6 10.Bg2 c6 (10...c5 11.c3-/+) 11.Nf3=+ Bd6 12.0-0 Be6 (12...Nd5 13.Qd2=+) 13.Rc1 (13.e3 c5=) 13...Rb8 (13...a5 14.c4=+) 14.Re1 (14.c3 dc3 15.Bc3 Qc7=) 14...b6 (14...a5 15.ba5 Qa5 16.c3 dc3 17.Bc3=+) 15.c3= dc3 (15...c5 16.b5=) 16.Bc3 Qc7 17.Ng5 (17.b5 cb5 18.Bb2 Qe7 19.Ne5 Be5 (19...Ba3?? 20.Nc6 Qd6 21.Be5 Qe5 22.Ne5+–) 20.Be5 Rbc8=) 17...c5 (17...Bf5!?=) 18.Ne6+/– fe6 19.Qd2 Rbe8 20.bc5 Bc5 21.Bb2 Nd5 22.e3 Rf7?? 23.d4+– ed4 24.ed4 Ref8 25.Rf1 Qd6 26.dc5 bc5 27.Rfe1 Rf5? 28.Re2 R8f7 29.Rce1 Re7 30.Bd5 Rd5 31.Qc3 Rd1 32.Rd1 Qd1 33.Qe1 Qd5 34.Qd2 Qf5 35.Kg2 Rf7 36.Qe3 h6 37.Qe6 Qf3 38.Kg1 a5 39.Qe3 Qd5 40.Bc3 c4 41.Qe8 Kh7 42.Qe4 Qe4 43.Re4 Rb7 44.Ba5 Rb3 45.Re3 c3 46.Rc3 Rb1 47.Kg2 Rb8 48.Bb4 h5 49.Bd6 Ra8 50.Rc4 Ra6 51.Bb4 1–0. Skean Du – DanielMena, ChessWorld.net, 2007.

4.c3 Be7 5.Bg2 0-0 6.Nh3 h6 7.d4 ed4 8.cd4 c6 9.Nc3 d5 10.0-0 a6 11.Nf4 Bd6 12.Qc2 Re8 13.Bd2 Bd7 14.e4 de4 15.Ne4 Ne4 16.Be4 Qe7 17.Rfe1 Qf8 18.Qc3 Bf4 19.Bf4 Bh3 20.d5 g5 21.Bc7 cd5 22.Bd5 Re1 23.Qe1 Nc6 24.Qe3 Re8 25.Qb6 Qg7 26.Rb1 Bc8 27.a4 Qd4 28.Bc6 Qb6 29.Bb6 bc6 30.Rf1 Re4 31.Rb1 Kg7 32.Rb2 Kg6 33.f3 Rc4 34.a5 Be6 35.Be3 f5 36.Kf2 Bd5 37.f4 Be4 38.fg5 hg5 39.Bc5 Kf6 40.h4 gh4 41.gh4 Bd5 42.Re2 Be6 43.h5 Rh4 44.Ke3 Rh5 45.Bd6 Rh3 46.Kd4 Rh1 47.Kc5 Rc1 48.Kb6 Kg5 49.Ka6 Bc4 50.Kb6 Be2 51.Bc5 Kg4 52.a6 Ba6 53.Ka6 f4 54.Kb6 f3 55.Bd4 Kg3 56.Kc7 Kg2 57.Kd6 f2 0-1. alireza1359 (1730) - n000b (1905), Rated Blitz tournament, lichess.org, 2014.

4.Bg2 Nc6 5.d3 a6 6.Bb2 h6 7.Nf3 Be7 8.Nbd2 0-0 9.0-0 Nh7 10.c4 f5 11.e3 f4 12.ef4 ef4 13.Ne4 fg3 14.fg3 Nf6 15.Qe2 Bg4 16.h3 Bh5 17.Kh2 Bg6 18.Nh4 Be4 19.de4 Ne5 (19...Qe8 20.e5 de5 A) worse is 21.Be5 Bd6 (worse is 21...Ne5 22.Qe5 c6 23.Nf5+/–) 22.Bc6 Qe5 (22...Qc6? 23.Bf6 Rf6 24.Rf6 gf6 25.Qe6 Kg7 26.Re1+–) 23.Qe5 Be5 24.Bb7 Ba1 25.Ra1 Ra7=; B) 21.Rad1+=) 20.Nf5 (20.Be5 de5 21.Ng6 Re8+/–) 20...Nh7 (20...Nfd7 21.Rad1+=) 21.Ne7 (21.Be5!? de5 22.Qg4+–) 21...Qe7+= 22.Rad1 Qe6 23.c5 Rf1 24.Bf1 Ng5 25.Bg2 Rf8 26.Rd5?? (better is 26.Be5 Qe5 27.cd6 cd6 28.Rd5+=) 26...Nef3-+ 27.Bf3 (27.Kh1 Ne4 28.Qe4 Qe4 29.Rd1-+) 27...Qh3 (27...Nf3?! 28.Kg2 Ng5 29.Qg4 Qg4 30.hg4 Ne4 31.Bd4-+) 28.Kg1 Nf3 29.Kf2 Nd4 30.Ke3 Ne2 31.Ke2 Qg2 32.Kd3 Qb2 (32...Rf3 33.Kd4 Qb2 34.Kc4 Qc3) 33.cd6 cd6 (33...Rf3 34.Kc4 Qc3) 34.Rd6 Qb3 (34...b5 35.Rf6 Rd8 36.Rd6 Rd6 37.Ke3 Qd2 38.Kf3 Rd3 39.Kg4 Qg5 40.Kh3 Qg3) 35.Kd4-+ Qa3 36.Rb6 Rd8 37.Ke5 Qc3 (37...Qg3 38.Ke6 Qg6 39.Ke5 Qg5 40.Ke6 Qf6) 38.Kf5 (38.Kf4 Rf8 39.Kg4 Qf3 40.Kh4 Qe4 41.Kh3 Rf1 42.g4 Qf3 43.Kh4 Rh1) 38...Qd4 (38...Qf3 39.Ke5 Qg3 40.Ke6 Qg6 41.Ke5 Qg5 42.Ke6 Qf6) 39.Rb7 (39.Rg6 Rf8 40.Kg4 Rf2 41.Rh6 Qd1 42.Kg5 gh6 43.Kh6 Qg4 44.e5 Rh2) 39...Rf8 (39...g6 40.Kf4 Rf8 41.Rf7 Rf7 42.Kg4 Qe4 43.Kh3 Qh1 44.Kg4 Qh5) 40.Kg4 (40.Rf7 Rf7 41.Kg4 Qe4 42.Kh3 Rf1 43.g4 Qf3 44.Kh4 Rh1) 40...Qe4 41.Kh3 Qb7 0–1. sacaniev – plus1963, kurnik, 2013.

5.d3 0-0 6.Nd2 c6 7.Ngf3 Nbd7 8.c4 d5 9.c5 e4 10.de4 de4 11.Ng5 h6?? (11...e3 12.Nde4 h6-+) 12.Nge4+/– Ne4 13.Ne4 Qc7 (13...Bf6 14.Rb1+/–) 14.0-0 Nf6 15.Bf4 Qd8 16.Qc2 Ne4 17.Be4 Bg5 (17...Qe8 18.Rad1+–) 18.Bd6 (18.Rfd1!? Qe8 19.Bg5 hg5+–) 18...Re8 19.Rad1 Qf6? (19...Bh3 20.Rfe1+/–) 20.Bf3?? (better is 20.f4 Bg4 21.Bd3+–) 20...Bf5 21.Qc4 Be6 (21...Bh3 22.b5 Bf1 23.Kf1 Qb2 24.bc6 bc6 25.Bc6 Qa3 26.Ba8 Ra8+–) 22.Qd3 Bf5 23.e4 Bh7? (better is 23...Bh3 24.Bg2 Bg2 25.Kg2 Qe6+–) 24.h4 Bh4 25.gh4 Qh4 26.Bg2 (better is 26.Rfe1!? a5+–) 26...Be4 27.Qg3 Qf6 28.Bh3 Bf3 29.Rd4 (29.Rde1 Be2 30.Bd7 Re4+/–) 29...Bd5?? (better is 29...Qd4 30.Qf3 Rad8=) 30.Rf4 Qg6 31.Rg4 (31.Qg6 fg6 32.Rd4 g5+–) 31...Qh7 (31...Qf6 32.Rb1+–) 32.Kh2 (32.Be5 g6+–) 32...Re6 (32...Be6 33.Rh4+–) 33.Rg1 Rg6 (33...g5 34.Rh4 f5 35.Rf4+–) 34.Rg6 Qg6 35.Qg6 (35.Qe5 Qh7 36.Bb8 Kh8 37.Rg7 Qg7 38.Qe8 Kh7 39.Bf5 Qg6 40.Bg6 Kg6 41.Qg8 Kf6+–) 35...fg6 36.Rg6 Re8 37.f4 Re2 38.Kg3 (38.Kg1 Kf7 39.f5 h5+–) 38...Re3 (38...Bf7 39.Rg4+–) 39.Kh4 Be4 (39...Kf7 40.Rg3 Re1 41.Bb8+–) 40.Rg1 Kh7 41.Be5 g6 42.a4 (42.Rg3 Re1+–) 42...Bc2 (42...Rb3 43.b5! cb5 44.ab5 Rb5 45.Rd1+–) 43.Bc8 Ba4? (43...g5 44.Kh5 Bd3 45.Kg4+– (45.Bb7?? Be2 46.Rg4 Rh3)) 44.Bb7 (better is 44.Ra1!? g5 45.Kg4 Bb3 46.Ra7 Kg8+–) 44...Bb5 (44...g5 45.Kh5 Bc2+–) 45.Rd1 (better is 45.Bc8 a6 46.Ra1+–) 45...Re4?? (better is 45...g5 46.fg5 hg5 47.Kg5 Re5 48.Kf6 Rh5+/–) 46.Rd7+– Kg8 47.Rg7 Kf8 48.Rg6 Rb4 49.Rh6 a5 50.Bc8 (worse is 50.Bc6 Bc6 51.Rc6 Ke7+–) 50...Ke7 (50...Bc4+–) 51.Bf5 a4 52.Rh7 Kf8 53.Bd6 Ke8 54.Kg5 1–0. sacaniev – darthvader2, kurnik, 2014.

5.d3 0-0 6.Bg5 c6 7.Qd2 Qc7 8.Nf3 Bd7 9.h4 Be6 10.0-0 h6 11.Bh6 gh6 12.Qh6 Nh7 13.Ng5 Bg5 14.hg5 Ng5 15.Qg5 Kh8 16.Be4 Qe7 17.Qe7 Nd7 18.Kg2 Rfe8 19.Rh1 Kg8 20.Qg5 Kf8 21.Rh8 Normal 1-0. chessito (1630) - devilsdavocate66, Rated Bullet tournament KTgGg63B, lichess.org, 2015.