3.Na3 f6 4.e3 e5 5.c3 Bd6 6.Nc2 (6.Ne2!?=) 6...Ne7-/+ 7.a4 (7.Be2 a5-/+) 7...0-0 8.Nf3 e4 (8...a5 9.Be2-/+) 9.Nh4 (9.Nfd4!? Nbc6 10.f4=+) 9...Be6 (9...Bd7 10.g3-/+) 10.g3 (better 10.Nd4 Qd7 11.g3-/+) 10...Nf5?? (better 10...Nbc6-+) 11.Nf5= Bf5 12.Bg2 (better 12.Nd4 Qd7 13.Qb3=) 12...h5?? (better 12...Nc6!?=+) 13.0-0 (13.Nd4 Bg6 14.Ne6 Qe8 15.Nf8 Qf8+-) 13...Bg4 (13...Nc6 14.d3=) 14.f3 ef3 15.Bf3 Bf3 (15...Nc6!?+=) 16.Qf3+- (16.Rf3?! Qd7=) 16...Qe8 (better 16...c6 17.Qh5 Nd7+-) 17.Nd4?? (better 17.Qd5 Qf7 18.Qb7+-) 17...Qf7+= 18.Nf5 (18.c4 dc4 19.Qb7 Nd7+=) 18...Nd7 (18...Nc6 19.Qe2=) 19.Nd6 cd6 20.d4 (better 20.c4=) 20...Qg6?? (better 20...Nb6!?-/+) 21.Qf5 (better 21.Qd5 Rf7 22.Qb7+-) 21...Qf5 22.Rf5 Rae8 (22...Nb6 23.Rh5 g6=) 23.Re1 (better 23.a5!?+=) 23...g6= 24.Rff1 (24.Rd5!? Nb6 25.Rb5 Na4 26.Ba1=+) 24...f5 25.Bc1 Nf6 26.Bd2 (26.Kg2 Rc8 27.Bb2 Ne4-/+) 26...Ne4 27.Re2 Rc8 (27...Nd2 28.Rd2 Re3 29.Rc1-/+) 28.Rc1 Rc4 29.a5 a6 30.Kg2 Kg7 31.Rc2 Rfc8 32.Kf3 (better 32.Rb2-/+) 32...Nc3?? (better 32...Rb4! 33.Be1 Ng5 34.Kg2 Rbc4-+) 33.Bc3 (33.Rc3 Rc3 34.Bc3 Rc3=) 33...Rc3 (33...Kf6!?=+) 34.Rc3= Rc3 35.Rb2 (35.b5 Ra3 36.ba6 ba6=) 35...Kf6 (35...g5 36.b5=+) 36.h3 (36.b5 g5=) 36...g5 (36...Ra3 37.Rc2=) 37.h4 g4 38.Ke2 (38.Kf2 Ra3-/+) 38...Ke6 (38...f4!? 39.gf4 Kf5-+) 39.Kd2 Rc4 (39...Ra3 40.Rc2-/+) 40.Kd3 (40.Ke2!?=+) 40...Rc1-/+ 41.Rc2? (better 41.Ke2-/+) 41...Rg1-+ 42.Rc7 Rg3 43.Rb7?? (43.Ke2 Rh3 44.Rb7 Rh4 45.Rh7 Rh2 46.Kf1-+) 43...Rg1 (better 43...f4 44.Ke2 Re3 45.Kf1 Ra3-+) 44.Rg7 (44.Rh7 g3 45.Rh6 Kd7=) 44...Rb1 (44...Rh1 45.Rg6 Kd7 46.Rg7 Kc6 47.Ra7-+) 45.Rg6= Kd7 46.Rg5 Rb4 47.Rf5 Rb3 48.Ke2 Ra3 (48...Rb5 49.Rh5 Ra5 50.Kf2=) 49.Rd5+= g3 50.Rg5 g2 51.Rg2 Ra5 52.Rg5?? (better 52.Rg7 Kc6 53.Kd3=) 52...Rg5-+ 53.hg5 a5 (better 53...Ke8 54.g6 a5-+) 54.g6 (54.e4 Ke8 55.e5-+) 54...Ke7 55.e4 Kf6 56.e5 de5 57.de5 Kg6 58.Ke3 Kf5 59.Kd4 Ke6 (59...Ke6 60.Ke4 a4 61.Kd4 a3 62.Kc3 h4 63.Kb3 h3 64.Kb4 a2 65.Kc3 a1Q 66.Kc4 h2 67.Kb4 Qb2 68.Kc4 h1Q 69.Kd3 Ke5 70.Kc4 Qd5) 0–1. invictus31 (1670) – devis (1630), lichess.org, 2020.

3.a4 Nf6 4.Bf6 ef6 5.e3 Bb4 6.g4 (6.Nf3 0-0-/+) 6...Bd7 (6...Be6 7.c3 Bd6 8.Qb3-+) 7.Qf3 Nc6 8.Qd5 0-0 9.Bd3 Re8 10.Qh5 g6 11.Qh6 (11.Qh3!?-/+) 11...Bg4-+ 12.Be2 (12.Qf4 f5 13.Be2 Qf6-+) 12...Be2 (better 12...Nd4!? 13.Kd1 Ne2 14.Ne2 g5-+) 13.Ne2 Ne5 14.Qf4 Qd6 15.c3?? (15.0-0 Bd2 16.c3 Qd5 17.Nd2 Qd2-+) 15...Ba5 (15...Nd3 16.Kf1 Nf4 17.Nf4-+) 16.h4?? (better 16.0-0-+) 16...Nd3 17.Kf1 Nf4 18.Nf4 Red8 19.h5 g5 20.Rg1 Bc3! 21.Nc3 (21.Nc3 Qd2 Decoy; 21.dc3 Qd1 Double attack) 21...Qd2 22.Nce2 (22.Nfe2 c5-+) 22...Kf8 23.Nh3 Qb2 (23...Qc2 24.f4-+) 24.Rc1 (24.Re1 Qb3 25.f4 Re8-+) 24...c6 (24...Rd2!? 25.Re1-+) 25.Rg4 Rd2 26.Nhg1 (26.Re1 Rad8 27.Nd4 c5-+) 26...Rad8 27.Rd4 (27.h6 a5-+) 27...R8d4 28.ed4 f5 (28...Rd4!? 29.a5-+) 29.Re1 Qb4 (better 29...g4!? 30.Kg2-+) 30.Nf3 Rd3 31.Ng5 Kg7 (31...h6 32.Nf4 Rd4 33.Nge6 fe6 34.Ne6 Kf7 35.Nd4 Qd4 36.a5-+) 32.h6 Kg6 (32...Kh6 33.Nf7 Kg7 34.Nd8-+) 33.Nf4 Kg5 34.Nd3 Qd4 35.Re3 f6 (35...Kh6 36.Rh3 Kg7 37.Rg3 Kf6 38.a5-+) 36.Rh3 c5 37.f4 (37.a5 Qa1 38.Ne1 Qa5 39.Nf3 Kg6-+) 37...Kg6 38.Ke2 (38.a5 c4 39.Rg3 Kh6 40.Rh3 Kg6 41.Rg3 Kf7-+) 38...Qe4 39.Re3 Qa4 40.Nc5 (40.Rg3 Kh6 41.Rh3 Kg7 42.Rg3 Kf7-+) 40…Qc2 (40...Qc2 41.Kf3 Qc5-+) 0-1. FelixMart – lfloresfr, Rated Correspondence game, lichess.org, 2020.

3.b5 Qd6 4.e3 e5 5.Nf3 c6 6.Be5+/- Qb4 7.Nc3 f6 (7...Nd7 8.bc6 bc6 9.Rb1+/-) 8.a3 (8.Rb1!? Qa5 9.Bb8 Rb8+-) 8...Qe7 9.Bg3 Nd7? (better 9...Qd7+-) 10.Nd4 Bg6 11.bc6 bc6 12.Nc6 Qc5 13.Nd4 Bf7 14.Bb5 Bd6 (14...Ne7+-) 15.Bd7 Kd7 16.Qg4 Ke7 (16...f5 17.Qg7 Ne7 18.Qf7 Bg3 19.hg3+-) 17.Nf5 Kd8 (17...Kd7 18.Bd6 Qc4 19.Qg7+-) 18.Nd6 Nh6 19.Nb7 (19.Nb7 Ke7 20.Qg7+-) 1-0. kasperoff (1820) - mkskhv68 (1685), Monthly Classical Arena, lichess.org, 2020.

3.Qc1 Nd7 4.Nf3 Ngf6 5.d3 e6 6.a3 a5 7.ba5 Ra5 8.Bc3 Ra8 9.Qb2 b6 10.Nd4 Bd6 11.g3 0-0 12.Bg2 Bg6 13.0-0 c5 14.Nb5 Be7 15.e3 Qc8 16.Nd2 Qa6? (better is 16...Ra4) 17.Nc7 Qb7 18.Na8 Ra8 19.a4 Ra6 20.Rfb1 Qa7 21.Qb5 h6 22.a5 Qb7 23.Nc4 Bd8 24.Nd6 Qa8 25.ab6 Ra1 26.Ra1 Qb8 27.Bf6 Nf6 28.b7 1–0. Wall,Bill – Guest1228867, playchess.com, 2012.

3.Nc3 Nc6 4.a3 e6 (4...d4 5.Nb1=+) 5.h4 (5.e3 d4 6.Nb5 e5 7.ed4 a6= (< 7...Nd4 8.Bd4 ed4 9.Qe2 Ne7 10.Qe5+/–)) 5...Nd4 (5...d4 6.Nb1-/+) 6.Rc1 Nc2 (better is 6...Nf6!?=+) 7.Rc2+= Bc2 8.Qc2 Qd7 0–1. top1 – mischief, internet, 2006.

3.Nc3 e6 4.a3 Nf6 5.Nb5 Ne4 (5...Nbd7 6.Nf3+=) 6.Be5 Na6 7.e3 f6 8.g4 (8.Bb2 c5=) 8...Bg6 (8...fe5 9.gf5 ef5 10.Nf3-/+) 9.Bd4 (9.Bb2 c6 10.Nd4 Nc7+=) 9...e5 10.Bb2 (10.Ba7? c6 11.d3 Ng5-+) 10...c6 11.Nf3? (better is 11.Nc3+=) 11...cb5-+ 12.Bb5 Kf7 13.h4 h5 Black is in command 14.g5 Nc7 15.Ba4 b5 16.gf6 ba4?? (better is 16...gf6 17.Bb3 Nd6-+) 17.Ne5+= Kg8 18.Ng6 Rh6 19.fg7 Rg6 20.Qh5 The passed pawn on h4 quickly leads to threats (better is 20.gf8N Qf8 21.Rf1+=) 20...Qd6?? (better is 20...Rg7 21.Bg7 Bg7=) 21.Qh8 (better is 21.gf8N!? Rf8 22.Be5 Qc6 23.Qh8 Kf7 24.Qh7 Ke8 25.Qc7 Qc7 26.Bc7 Rg2+-) 21...Kf7 22.h5?? (better is 22.gf8B Rf8 23.Qh7 Ke8 24.Be5 Qe5 25.Qg6 Kd8 26.Rd1+-) 22...Rg7-/+ 23.Bg7 Bg7 24.Qh7 Qf6 The mate threat is Qxf2 25.Qg6 Qg6 26.hg6 Kg6 27.0-0-0 (27.c3 Rf8 28.f4 Kf7-+) 27...Kf5 (27...a5!? 28.f3 Nf6 29.c3-+) 28.Rdg1 (28.Rh5 Kf6-/+) 28…Ne6?? (better is 28...Bf6-/+) ½–½. Wall,Bill – Pennell,Gary, Taylorsville, 1975.

3.c4 a6 4.cd5 Qd5 5.Nc3 Qe6 (5...Qd6 6.Qa4 c6 7.e4=) 6.e3 (6.Nf3 Qd6=) 6...Nc6 (6...Nf6 7.d4=) 7.Nf3 (7.d4 Qg6= (7...Nb4? 8.Qa4 Qc6 9.Qb4+-)) 7...Nb4 (better is 7...Qd6=) 8.Bd3?? (8.Qa4 Nc6+=) 8...h5 (better is 8...Nd3 9.Ke2 Nb2-+) 9.Bf5 (9.Qa4!? b5 10.Bb5 c6 11.Bc6 Nc6 12.Nd4+=) 9...Qf5= 10.Nd4? (10.Qa4 Nc6=) 10...Qg6?? (10...Nd3!? 11.Ke2 Qg6-/+) 11.0-0 (better is 11.Qa4!? Nc6 12.Nc6 Qc6 13.Qc6 bc6 14.Ne4=) 11...e5 12.Nf3 Bd6 (12...Nd3 13.Rb1-/+) 13.Nh4? (13.Qa4 Nc6=) 13...Qh7 (13...Qg4 14.Qa4 c6 15.g3-+) 14.Qc1? (better is 14.Ba3!? a5 15.Qf3=) 14...g5 (14...Nf6 15.d4 ed4 16.ed4-+) 15.Nf3-/+ 0-0-0 (better is 15...g4!? 16.Ng5 Qc2 17.Qc2 Nc2-/+) 16.Ng5= Qg6 17.Nge4 (17.f4 Nd3 18.Qc2 A) < 18...ef4 19.Nce4 Nb2 A1) < 20.Nd6 Rd6 (20...Qd6?! 21.Qb2 Nh6 22.Rab1=) 21.Qb2 Qg5 22.Qh8 Rd2-/+; A2) 20.Qb2+=; B) 18...Nb2?! 19.Qb2 Nf6 20.Rab1+=; C) 18...Be7=+) 17...Nf6 (better is 17...Ne7!?-/+) 18.Nf6= (< 18.Nd6 Rd6 (18...cd6? 19.Nd5 Kb8 20.Qc7 Ka8 21.Nb4+-) 19.d4 ed4 20.ed4 Rg8-/+) 18...Qf6 19.Na4? (better is 19.Ne4 Qg6 20.Qc4=+) 19...Rhg8-+ 20.Ba3?? (20.g3 Nd3 21.Qc2 Qg6 (< 21...Nb2 22.Nb2 Qe6 23.Nc4=+) 22.Nb6 Kb8-+) 20...Qg5 (20...Rg2! 21.Kh1 Rh2 22.Kh2 Qh4 23.Kg2 Rg8 24.Kf3 Qg4) 21.g3-+ h4 22.Bb4 Bb4 23.Nb6 Kb8 24.Qc7?? Ka7 25.Rab1 hg3= 26.fg3 Bd6?? 27.Qc3 f5 28.e4?? f4= 29.Nd5 fg3?? 30.Qg3 Qd2-+ 31.Qg8 Rg8 32.Kh1 Qg2# 0–1. kilmer49 – vello01, Caissa's Web, 2004.

3.c4 d4 4.Nf3+= d3 (4...c5 5.bc5 Nc6 6.Qa4=) 5.ed3+- Bd3 6.Nc3 Nc6 7.Nd5 Bf1 8.Kf1 e6 9.Qe2 Nf6 (9...Nge7 10.Ne7 Ne7 11.Re1+-) 10.b5 Nb8 (10...Na5 11.Bc3 c6 12.Nf6 gf6 13.bc6 Nc6 14.d4+-) 11.Nf6 gf6 12.g3 Be7 13.Kg2 Nd7 14.d4 Nb6 (14...0-0 15.Rhd1+-) 15.d5 e5 16.a4 Nd7 17.Nh4 Bc5 (17...Rg8+-) 18.Nf5 (18.f4 0-0+-) 18...Rg8 (18...Nb6 19.Rhe1 Bb4 20.Rf1+-) 19.f4 Kf8 20.Rae1 (20.fe5?! fe5 21.Rhf1 Qg5+-) 20...Rg6 21.fe5 fe5 22.Be5 Ne5 23.Qe5 Qf6 (23...Kg8 24.Rhf1+-) 24.Qc7 b6 (24...Bb4 25.Qb7 Rd8 26.Qc7 Be1 27.Re1 Rd5 28.cd5 Qf5 29.Qc5 (worse 29.Qa7 Qd5 30.Kg1 Kg7+-) 29...Kg7 30.Qd4 Qf6 31.Qf6 Rf6 32.Rc1+-) 25.Rhf1 Qd8 26.Qf4 Qd7 (26...Qf6 27.Qe4 Rd8 28.Nh6 Rg3 29.hg3 Qh6 30.Rh1+-) 27.Nh6 f6 28.Re6 Bd4 (28...Kg7 29.Rf6 Qe8 30.Qh4 Qe2 31.Kh3 Qf1 32.Rf1 Rh6 33.Rf7 Kf7 34.Qh6+-) 29.Rfe1 Bb2 (29...Bc5 30.d6 Bd6 31.Rd6 Qb7 32.Kf2 Kg7+-) 30.Re7! Qe7 (30...Qe7 31.Re7 Combination) 31.Re7 Ke7 32.Qc7 Ke8 33.d6 (33.d6 Rg7 34.Qg7 Kd8 35.Qe7 Kc8 36.Qc7) 1–0. pcmvr – mpenga, net–chess.com, 2019.

3.d3 b5 4.a4 (4.e4 de4 5.Nc3 a5 6.de4 ab4 7.ef5 bc3 8.Qd8 Kd8 9.Bc3 c6+=) 4...c6 (4...ba4 5.Nf3=) 5.e4 Be6 (5...de4 6.de4 Qd1 7.Kd1 Be4 8.ab5+/–) 6.Nd2 a5 7.ab5 cb5 8.d4 Nc6 (8...Nd7!?+=) 9.Bb5+/– Qb6? (better is 9...Bd7 10.ba5 Ra5+/–) 10.c4+- Bd7 11.ed5 (11.ba5 Ra5 12.Ra5 Qa5 13.ed5 Nb8 14.Bd7 Nd7+-) 11...Nb4 12.Bd7 Kd7 13.Qa4 Kc7 (13...Kd8 14.Bc3 e5 15.c5 Nd3 16.Kf1 Bc5 17.dc5 Nc5 18.Qc6 Qc6 19.dc6+-) 14.Bc3 Qe6 (14...e5 15.c5 Bc5 16.dc5 Nd3 17.Kf1 Nc5+-) 15.de6 Nc6 16.d5 Nd8 Plans fxe6 17.Be5 Kb7 18.Qb5 Kc8 19.Qd7# 1–0. Woelfelschneider,Peter – Kurz, 2010.

3.d3 c6 4.g3 (4.Nf3 e6 5.a3 a5=) 4...e6=+ 5.a3 Nf6 6.Bg2 Be7 7.Nd2 Qb6 (7...a5 8.e4 Bg6 9.e5=+) 8.c4 a5 9.Qa4 (9.e4 Bg6=+) 9...0-0 (9...Ra7 10.Qb3=+) 10.b5 (10.Rb1 Qc7=+) 10...Nbd7 (10...Bc5 11.Bf6 Bf2 12.Kd1 Bg1 13.bc6 bc6 14.Bc3-/+) 11.Ngf3 (11.Rb1 Bc5 12.Bf6 Bf2 (< 12...gf6 13.bc6 Qc6 14.Qb3+=) 13.Kf1 Bg1 (13...gf6 14.bc6 Qe3 15.cb7+/–; 13...Nf6?! 14.bc6 Qe3 15.cd5 Bg1 16.Qf4 Nd5 17.Qe3 Be3 18.cb7-/+) 14.Rg1 Nf6 (< 14...gf6 15.bc6 Qc6 16.Qb5+=) 15.bc6 Qe3-+ (15...Qc6?! 16.Qc6 bc6 17.Rb6=+)) 11...Ng4 (11...Nc5!? 12.Qc2 cb5 13.Bf6 Bf6-/+ (13...gf6?! 14.Nh4=)) 12.Bd4 Bc5 13.Bc5?? (better is 13.Nb3 e5 14.Nc5 Nc5 15.Bc5 Qc5 16.0-0=) 13...Nc5-+ 14.Qd1 Nd3! (15.ed3 Qf2) 0–1. NN (1755) – NN (1905), net–chess.com, 2001.

3.d3 Nc6 4.a3 f6 5.g3 Qd6 6.Bg2 Nh6 7.Nc3 d4 8.Nb5 Qd5?? (better is 8...Qd7 9.c3 e5=) 9.Nc7 Kd8 10.Nd5 (10.Na8? Qg2 11.b5 Qh1-+) 10...Be6 11.Nf4 (11.b5 Ne5 12.Bd4 Nef7+-) 11...Bg4 12.h3 Bf5 13.Bc6 (better is 13.b5 Ne5 14.Bd4 Bc8+-) 13...bc6 14.Nf3 g5 (14...e5 15.g4 Bd7 16.Nh5+-) 15.Ne6! Be6 16.Bd4 g4 17.hg4 Ng4 18.Qd2 Bd5 (18...Bd7 19.Ng5! Kc8 20.Nf7+-) 19.Qf4 f5 (19...h5 20.c4 e5+-) 20.Bh8 Bf3 21.ef3 e5 22.Qf5 Nf6 23.Bf6 Ke8 (23...Kc7 24.Qe5 Kb6 25.Qa5 Kb7 26.Rh7 Bg7 27.Rg7 Kc8 28.Qd8) 24.Qe6 Be7 25.Qe7 1–0. nordlicht (2090) – harzer, gameknot.com, 2006.

3.d3 Qd6 4.a3 e5 5.Nf3 Nd7 6.Nbd2 Be7 7.e4 de4 8.de4 Be6 9.c4 c5 10.Bc3 f6 11.Be2 Nh6 12.0-0 0-0 13.Nb3 Qd1 14.Rfd1 cb4 15.ab4 Nb6 (better is 15...Rfc8!?+=) 16.Na5+/– Rac8 17.c5 Rc7 18.Be1 (18.cb6?! ab6 19.Bd2 ba5 20.ba5 Rfc8=) 18...Nc8 19.Bc4 Bc4 20.Nc4 b6 21.Nd6 (21.Ne3!? bc5 22.Nd5+=) 21...bc5 (21...Bd6!? 22.cd6 Rd7+=) 22.bc5= Rc5 23.Nc8 Rfc8 24.Ra7 Bf8 25.h3 Rc4 26.Rad7 Re4 27.Rd8 Rd8 28.Rd8 Kf7 29.Kf1 Be7 30.Rd3 Rc4 31.Nd2 Rc6 32.g4 Ke6 33.Nf3 Nf7 34.Kg2 g6 35.h4 f5 (35...f5 36.gf5 gf5-+) 0–1. Sapareva,Magdalena – Cholakov,Nikolay (1750), 146th MGU Open, 2015.

3.d3 e5 4.Be5 Bb4 (4...Nc6 5.Bf4 Bb4 6.c3=+) 5.c3= Bd6?? (better is 5...Bf8=) 6.Bg7+- Be5 7.Be5 f6 8.Bf4 Nc6 9.g3 Qe7 10.Bg2 0-0-0 11.Nf3 h5 12.0-0 Ne5 13.d4 Nf3 14.Bf3 Bh3 15.Re1 h4 16.e4 de4 17.Be4 hg3 18.fg3 Qa3 19.Na3 f5 20.Bf3 Nf6 21.Qb3 Ne4 22.Be4 fe4 23.Rab1 b6 24.Qc4 Rh7 25.Qa6 Kb8 26.Nb5 (26...Be6 27.Na7 Rd6 28.Bd6 cd6 29.Qb6 Rb7 30.Qb7#) 1–0. grimstad – willow27, ChessWorld.net, 2005.

3.e3 b6 4.b5 (4.Nf3 Nf6=) 4...c6 (4...a6 5.ba6 c6 6.Nf3=) 5.a4 (5.Nf3 a6 6.a4 e6=) 5...cb5 (5...f6 6.f4=) 6.ab5+= e6 (6...Nf6 7.Bf6 ef6 8.Nf3+=) 7.Nf3 Nf6 8.c4 (8.Be2 Bd6+=) 8...Bc5 (8...Bd6 9.cd5 ed5 10.Be2=) 9.cd5+= ed5 10.Be2 0-0 11.0-0 Nbd7 (11...Re8 12.Qa4+=) 12.Nd4 (12.Nc3 Re8+=) 12...Bd4 13.Bd4 (13.ed4?! Qc7=+) 13...Re8 (13...Qe7 14.Nc3+=) 14.Nc3+- Ne4 (14...Qe7 15.g4 Ng4 16.Bg4+- (16.Nd5 Qg5 17.f4 Qg6 18.Bg4 Bg4-+)) 15.Nd5 Re6 (15...Ndc5!? 16.Nf4 Nd6+-) 16.d3+- Rg6?? (better 16...Nd6 17.Nc3 Nc5+-) 17.de4 Be4 18.Nf4 (18.Bf3!? Re6+-) 18...Rd6 19.Qb3 Nf6 (19...Qe7 20.Qc3+-) 20.Bc4 h5 (20...Qe7 21.Qb4+-) 21.Bf7 Kh7 (21...Kh8 22.Qc4+-) 22.Be5 Rd3 (22...Rd7 23.Qe6 Ne8 24.Bh5+-) 23.Nd3 (better 23.Qc4 Bf5 24.e4 Ne4 25.Qd3 Qd3 26.Nd3 Nd2+-) 23...Rc8 (23...Qd3 24.Qb4 Bd5+-) 24.Nf4 (better 24.Ra7 Qd3 25.Bf6 Qb3 26.Bb3 Bd3+-) 24...Ng4 25.Qe6 Ne5 26.Qe5 Ba8 27.Qh5 1–0. Anonymous – Anonymous, lichess.org, 2020.

3.e3 Qd7 4.b5 Nf6 5.Nf3 e6 6.Ne5 (6.Be2 Bd6=) 6...Qc8 (6...Qd6 7.g4 Bg6 8.Ng6 hg6 9.f4=) 7.g4 Bg6 8.h4 h6 (better 8...Bd6!?=) 9.Ng6+- fg6 10.Bd3 Ne4 (10...Bd6 11.Bg6 Kd8 12.f4+-) 11.Nc3 h5? (better 11...Nc3!? 12.Bg6 Kd8 13.Bc3 Qd7+-) 12.Ne4+- Rh6?? (12...de4 13.Be4 Kd8+-) 13.Ng5 (13.g5 Rh8 14.Ng3 Kf7+-) 13...Qd7 (13...c6 14.Qf3 Qd7 15.gh5 cb5 16.Bg6 Rg6 17.hg6+-) 14.gh5 gh5 15.Bg6! Rg6 (15...Kd8 16.Qf3 Bd6 17.Nf7 Kc8 18.Nh6 gh6 19.Bf7+-) 16.Qh5 Qb5 (16...Qe7 17.Qg6 Kd7 18.Ba3+-) 17.Qg6 Kd7 18.Qe6 Kd8 19.Nf7 1–0. DEFFM – Cengoizhan, freechess.org, 2018.

3.e3 Be4 4.c4 (4.Nc3 Bf5=) 4...Nc6 (4...dc4 5.Qg4 Bd5 6.Bg7 Nf6 7.Bf6 ef6=) 5.b5?? (better is 5.d3 Bg6 6.b5+=) 5...Nb4-+ 6.f3 Nc2 7.Kf2 Na1?? (better is 7...Bg6-+) 8.fe4= e5 (8...e6 9.Nc3 Qf6 10.Ke1 de4 11.Qb1+=) 9.Ba1 (9.cd5 Qh4 10.Ke2 Nf6 11.Ba1 Qe4+/–) 9...Qh4 (9...Qf6!? 10.Ke1 Qh4 (worse is 10...de4 11.Qg4+-) 11.g3 Qe4+=) 10.g3+/– Qe4 11.Nf3 Bd6 12.c5! Bc5 13.Be5 Nf6 14.Bf6 gf6 15.d4 Bb6 16.Bd3 Qg4 17.Qc2 h5? 18.Bf5 Qg7 19.Nc3 Rd8 20.Nd5! Rd5 21.Qe4 (21.Qe4 Re5 22.de5+- (22.Ne5?! fe5 23.de5 h4+/–)) 1–0. Wall,Bill – Train D, internet, 2005.

3.e4 de4 4.b5 e6 (4...Nf6 5.Ne2-/+) 5.c4 (5.Ne2 Nf6-/+) 5...Nf6-+ 6.Nc3 (better 6.Ne2-+) 6...Qd4?? (6...Bc5 7.f3-+) 7.Na4? (better 7.Nd5! Qb2 8.Nc7 Kd8 9.Na8=) 7...Qd6 (7...Qd7 8.Bf6 gf6 9.Ne2-/+) 8.Ne2 (8.c5 Qd7-/+) 8...Nbd7-+ 9.Ng3 Bg6 10.Be2 (10.h4 0-0-0-+) 10...a6 (10...0-0-0 11.Rc1 Nc5 12.Nc5 Qc5 13.Qb3-+) 11.ba6 (11.c5 Qd5 12.c6 bc6 13.ba6 Bd6-/+) 11...Ra6 (better 11...Qa6 12.Nc3 Bc5-+) 12.c5= (12.c5 Qc6 13.Ba6 Qa6 14.Bf6 gf6 15.h4=+). DEFFM – honestpupil, freechess.org, 2016.

3.f3 e6 4.e4 de4 5.fe4 Be4 6.d3 Bg6 (6...Bb4?! 7.c3 Bc5 8.de4 Qh4 9.Kd2=+) 7.Nd2 (7.a3 Nf6-/+) 7...Nf6 (7...Qh4 8.g3 Qb4 9.Rb1-+) 8.a3-/+ Be7 9.Ngf3 h6 (9...Nbd7 10.Be2-/+) 10.Be2 a6 11.0-0 0-0 12.Ne5 Bh7 13.Bh5 Nbd7 14.Bf7 Rf7 15.Nf7 Kf7 16.Ne4 Kg8 17.Nf6 Bf6 (17...gf6?! 18.Qg4 Kf7 19.Rae1=) 18.Bf6 Nf6 (18...gf6?! 19.Qg4 Kf7 20.Qf4=+) 19.Qe2 Qd7 (19...Qd4 20.Qf2 e5 21.Rae1-+) 20.Rae1 Re8 21.Qf3 c6 (21...Qd4 22.Kh1 Qc3 23.Re2-/+) 22.Qe3 (22.Qf4 Bf5-/+) 22...Qd6 23.Qb6 Re7 24.Qa7 Bf5 25.Qa8 Kh7 26.Qa7 Ng4 27.g3 Nf6 28.Qc5 Qc5 29.bc5 Nd7?? (better 29...Bg6-+) 30.Rf5!+- ef5 (30...g6!? 31.Rf3 Nc5+-) 31.Re7 Nc5 32.d4 Ne4 33.Rb7 c5 (33...Nc3 34.Rb4 g5 35.Kf2+-) 34.d5 c4 (34...a5 35.c4+-) 35.Rb6 a5 (35...Kg8 36.Ra6 Kf7 37.Rc6+-) 36.Ra6 (better 36.d6 Nf6 37.Rb7 Kg6+-) 36...a4 (36...Kg8+-) 37.Ra4 g5 (37...Nd6 38.Ra6 Nf7 39.d6+-) 38.Rc4 g4 (38...Nf6 39.Rc7 Kg8 40.d6+-) 39.a4 (39.Re4 fe4 40.d6 e3+-) 39...h5 (39...Nf6 40.d6 Kg6 41.a5+-) 40.a5 (40.Re4 fe4 41.d6 e3+-) 40...h4 41.gh4 g3 42.hg3 Ng3 43.d6 f4 44.d7 Ne2 (44...Kg8 45.d8Q Kf7 46.Rc7 Ke6 47.Rc6 Ke5 48.Qd6 Ke4 49.Qe6 Kd4 50.Rc4) 45.Kf2 (45.Kh2 Kg7 46.d8Q Kg6 47.Rc6 Kf5 48.Qd5 Kg4 49.Rg6 Kh4 50.Qg5) 45...f3 (45...Ng3 46.d8Q Nh1 47.Kf3 Kg6 48.Qd6 Kh5 49.Rc5 Kh4 50.Qh6) 46.d8Q Nc3 (46...Kg6 47.Qd6 Kf5 48.c3 Nd4 49.Rc5 Ke4 50.Qd4) 47.Qd3 (47.Rc7 Kg6 48.Qg5) 47...Kh6 (47...Kg7 48.Qd7 Kf6 49.Qd6 Kf7 50.Rc7 Ke8 51.Qe7) 48.Qc3 (48.Rc6 Kh5 49.Qf5 Kh4 50.Rh6) 48...Kh5 (48...Kg6 49.Rc6 Kf7 50.Qb3 Kf8 51.Rc7 Ke8 52.Qg8) 49.Qf3 (49.Qe5 Kh6 50.Rc7 Kg6 51.Qg5) 49...Kh6 (49...Kg6 50.Rg4 Kh6 51.Qf6 Kh5 52.Qg5) 50.Rc6 (50.Qf6 Kh7 51.Rc7 Kg8 52.Qd8) 50...Kh7 (50...Kg7 51.Qf6 Kg8 52.Rc8 Kh7 53.Rh8) 51.Qf7 Kh8 52.Rc8 1–0. alessandrocarvalhaes (1620) – DRIVE777 (1660), lichess.org, 2017.

3.Nf3 Na6 4.b5 Nb4 5.d3 c6 6.a3 Qa5 (6...Nd3 7.cd3 cb5+-) 7.ab4 Qb4 8.Bc3 (8.Bc3 Qd6 9.bc6 bc6 10.h3+-) 1–0. DEFFM – drzach, freechess.org, 2019.

3.Nf3 Be4 4.c4 (4.e3 e6=) 4...dc4 5.Nc3 Nf6 6.Ne4 Ne4 7.Qc2 e5?? (better is 7...Qd5=) 8.Qe4+- Nc6 (8...f6 9.Qb7 Nd7 10.b5+-) 9.b5 (worse is 9.Ne5 Qe7 10.b5 Ne5 11.Qe5 Qe5 12.Be5 a6 13.ba6 Ra6+-; worse is 9.Be5 Qe7 10.b5 Ne5 11.Qe5 Qe5 12.Ne5 a6 13.ba6 b5+-) 9...Nb4 10.Ne5 Bd6 (10...Be7+-) 11.Nc6 Be7 12.Nd8 Kd8 13.a3 f6 14.ab4 c6 15.bc6 Bb4 16.Qd4 Kc7 17.Qd7 Kb6 18.Bd4 Bc5 19.Qb7 1–0. glovio – lady, gameknot.com, 2013.

3.Nf3 Bg4 4.e3 Bf3 (4...Nf6 5.h3 Bf3 6.Qf3=) 5.Qf3+= f6? (better 5...e6!?+=) 6.c4 e6 7.cd5 (7.b5!? Ne7+-) 7...Qd5+- 8.e4 Qd8 (8...Qd6!? 9.Na3 Nc6+-) 9.Bc4+- Qe7 (9...Qd6 10.Qh3 Nc6 11.b5+-) 10.a3 a5 (10...Nc6 11.Qh3 f5 12.0-0+-) 11.e5 (better 11.Qb3 ab4 12.Be6+-) 11...ab4?? (better 11...Nc6 12.0-0 ab4 13.ab4 Ra1 14.Ba1 Ne5 15.Be5 fe5 16.Qb7 Nf6+-) 12.Qb7+- ba3 (12...Ra5 13.Qb8 Qd8+-) 13.Qa8 ab2 14.Qb8 Qd8 15.Qb2 fe5 16.Qe5 Qf6 (16...Qd6 17.Ra8 Ke7+-) 17.Ra8 Kf7 18.Be6! Qe6 19.Rf8! Ke7 (19...Kf8 20.Qe6 Deflection (20.Qe6 Overloading)) 20.Re8! Kf7 (20...Ke8 21.Qe6 Deflection) 21.Qe6 1–0. DEFFM – GuestHMJN, freechess.org, 2019.

3.g3 Nc6 4.b5 Nb4 5.d3+= 6.a3+- Qg5 7.ab4 Bb4 8.c3 Bc5 9.Nf3 Qf6 10.Bg2 Ne7 11.0-0 0-0 12.Qc2 Nc8 13.Nbd2 Nd6 14.Rab1 Nb5 15.c4 dc4 16.Bf6 gf6 17.e4 Be4 18.de4 Na3 19.Qb2 Nb1 20.Rb1 b6 21.Qf6 Rad8 22.Nc4 (22…Rde8 23.Qg5 Kh8 24.Qe5 Kg8 25.Qc7+-) 1–0. AbstractPoetic – mvlease, internet, 2007.

3.h3 Nc6 4.b5 Nb4 5.d3 e6 6.a3 Nc2 7.Qc2 Nf6 8.g4 Bg6 9.Bg2 (9.Nf3 Bd6+-) 9...Bd6 10.Nd2 (10.Nf3 0-0+-) 10...Bf4?! (10...a6 11.ba6 Ra6 12.Ngf3+-) 11.e3 (11.Qa4!? Bd2 12.Kd2 0-0+-) 11...Bd6 12.g5 Nh5 13.Bf3 (better 13.h4 Qd7 14.Bf3 Qb5 15.Bh5 Bh5 16.Bg7+-) 13...f6?? (13...Qg5 14.Ne2+-) 14.Bh5 (better 14.Qd1 Ng3 15.fg3 Bg3 16.Ke2+-) 14...Bh5 15.gf6 gf6 16.Ngf3 Bf3 (16...Rg8+-) 17.Nf3 Be5 (17...a6 18.ba6 Ra6+-) 18.Ne5 fe5 19.Be5 Rg8 20.Qa4 (20.Ke2 Qd7+-) 20...Qg5 (20...Qd7 21.Ke2 a6 22.Rhg1+-) 21.b6 (better 21.d4 b6+-) 21...c6 22.Qd4 (better 22.Bg3 a6 23.Kd2+-) 22...Qg2 (22...ab6 23.a4 Qf5+-) 23.Ke2 Rf8 (23...ab6 24.Rhg1 Qg1 25.Rg1 Rg1 26.Qb6+-) 24.Bg3 (better 24.Bf4 Qg6 25.ba7 Qh5 26.f3 e5+-) 24...Qf3 25.Kd2 h5 (25...Qf6 26.Qb4+-) 26.Qh4 (better 26.ba7 Qf6 27.Qb6+-) 26...ab6 27.Qd4 0-0-0 (27...b5+-) 28.Qb6 (better 28.Qe5 Qf7 29.Qb8 Kd7 30.Qb7 Ke8 31.Qc6 Qd7 32.Qb6 Rc8+-) 28...d4 (28...Rf7+-) 29.Qc7 1–0. TWW_LONDON – JoshuaOindi (1610), lichess.org, 2020.

3.Nh3 Nc6 4.e3 (4.b5 Na5=+) 4...a6 (4...Nb4!? 5.Na3 Bh3 6.gh3 Nf6-/+) 5.g4 Bg6 6.Nf4 (6.a3 e5=+) 6...Nb4 (better is 6...Be4 7.f3 e5=+) 7.c3?? (better is 7.d3=+) 7...Nc2-+ 8.Qc2 (8.Ke2 Qd7 9.d3 Na1 10.Ke1-+) 8...Bc2 9.Bg2 e6 10.Ba3 Bb1 11.Rb1 Ba3 12.Rb7 Rb8 13.Rb3 Rb3 14.Nh5 Rb1 15.Ke2 Rb2 16.Ng7 Kf8 17.Nh5 Qh4 18.Ng3 Qg4 19.f3 Qc4 20.Kf2 Rd2 21.Ke1 Qc3 22.Bh3 Qc1 0–1. tsaunders – speqter, net–chess.com, 2004.

3.Nh3 e5 4.Be5 Nc6 5.Bg3 Nb4 6.d3 -/+.

3.h4 e6 4.Nf3 Nd7 5.Rg1 h6 6.g4 Be4 7.g5 hg5 8.hg5 Ne7 9.d3 Bg6 (9...Bf3!? 10.ef3 Nf5-/+) 10.Nbd2=+ Nf5 11.e4 de4 12.de4 Nd6 13.e5 Nf5 14.a3 Be7 15.Ne4 (15.Nc4 Bh5=) 15...Nb6 (15...a5 16.b5=+) 16.Qd8 Rd8 17.Bd3 Nd5 18.0-0-0 0-0 (18...Rh3 19.Nfd2=+) 19.Ng3 (better 19.Nf6!? Bf6 20.gf6+=) 19...Nf4 20.Bf5 Bf5 21.Nf5 Ne2 22.Kb1 Ng1?? (better 22...ef5 23.Rh1 Nf4+=) 23.Ne7+- Kh7 (23...Kh8 24.Rg1 g6 25.Bd4+-) 24.Rg1 (better 24.g6 fg6 25.Rg1+-) 24...g6 25.Rh1 Kg7 26.b5 (26.c4 Rh8 27.Rh8 Rh8+-) 26...Rd7 (26...Rfe8 27.Ng6! Kg6 28.Rh6 Kg7 29.Bd4+-) 27.Ng6! fg6 (27...fg6 28.Nd4 Combination; 27...Kg6 28.Rh6 Combination) 28.Nd4 Rf2 (28...Kf7 29.Bc3+-) 29.Ne6 Kg8 30.Nd4 (30.Nc5 Rh7 31.Rd1 Rhh2+-) 30...Rg2 (30...Rd2 31.e6 R7d4 32.Kc1+- (32.Bd4?! Rd4 33.Rf1 Re4+-)) 31.e6 Re7 (31...Rh7 32.Rh7 Kh7 33.Nf3+-) 32.Nf3 (better 32.Ne2! Re6 33.Nf4 Rge2 34.Rh8 Kf7 35.Rh7 Ke8 36.Ne2 Re2+-) 32...Re6 33.Rh8 Kf7 34.Rh7 Ke8 35.Rc7 Re3 36.Ne5 Rg5 37.Nc4 (37.Nf7 Rd5 38.Rb7 Re7 39.Re7 Ke7+-) 37...Re1? (better 37...Re7 38.Nd6 Kd8 39.Re7 Ke7 40.Nc8 Ke6 41.Na7 Rf5+-) 38.Ka2 Re7 39.Rc8 (better 39.Nd6!? Kd8 40.Rc8 (40.Rb7?! Rb7 41.Nb7 Kc7+-) 40...Kd7 41.Bf6+-) 39...Kd7 40.Rb8 (better 40.b6!? a6 41.Rc7 Ke6 42.Ne5+-) 40...Rb5+= 41.Ra8 (41.a4 Kc7 42.Rg8 Rb4+-) 41...a6 42.a4 (better 42.Rg8 Re6 43.Bd4+=) 42...Rb2?? (better 42...Rc5 43.Kb3 Re4=) 43.Kb2+- Kc6. beatmeeasy (1855) – shatarchin1 (1845), lichess.org, 2020.

3.h4 f6 4.Nf3 e5 5.a3 Bd6 6.h5 Ne7 7.Rg1 h6 8.g4 Bh7 9.e3 Nbc6 10.Bb5 (10.c4 e4 11.c5 Be5 12.Ne5 Ne5= (worse 12...fe5 13.b5+-)) 10...a6 11.Bc6 Nc6 12.d3 Qd7 13.Nbd2 0-0-0 14.Nb3 Qe7 Black plans e4 15.Qe2 e4 16.de4 Be4 17.Nfd4 (17.0-0-0!?=+) 17...Nd4-/+ 18.Bd4 Be5 (better 18...Bh2!? 19.f3 Bg1 20.fe4 Qd6-/+) 19.b5 ab5 20.Qb5 Bc2 21.Nc5 c6 22.Qb6?? (better 22.Qb4 Bd4 23.Qd4=+) 22…Bd4-+ 0–1. beatmeeasy (1895) – OTAK_ROTE (1875), lichess.org, 2021.

3.a3 (--> 1.b4 d5 2.a3 Bf5 3.Bb2).

3.a3 c6 4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.a3).

3.a3 e6 4.e3 Nf6 5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

3.a3 e6 4.Nf3 (--> 3.Nf3 e6 4.a3).

3.a3 e6 4.Nf3 Nf6 5.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

3.a3 Nf6 4.Nf3 Nbd7 5.e3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7).

4.e3 e6 5.a4 h6 6.c4 Nd7 (6...Nf6 7.cd5 Nd5 8.Qf3=) 7.Nf3+= Bg4 8.Be2 Bf3 (8...dc4 9.Bc4 Ngf6 10.0-0+=) 9.Bf3+- (worse 9.gf3 dc4 10.Bc4 Ngf6=) 9...Rb8 (better 9...Ngf6!?+-) 10.cd5+- ed5 11.Bd5 f6?? (better 11...Ne5 12.Qb3 Nf6+-) 12.Qh5 Ke7 (12...g6 13.Qg6 Ke7 14.Qf7 Kd6 15.Qe6 Kc5 16.Ba3) 13.Qf7 Kd6 14.Qe6 Kc5 15.Qc6 (15.Ba3) 15...Kb4 16.Bc3 1–0. KLINGON09 (1770) – shiv77 (1765), lichess.org, 2019.

4.e3 e6 5.Nf3 Nf6 6.Be2 Bc5 7.Nh4 Bg6 8.d4 Bd6 9.0-0 0-0 (9...a6 10.ba6 Nfd7 11.Ng6 hg6 12.h3=) 10.c4 Bb1 11.Rb1 c6 12.Nf3 Qd7 (12...dc4 13.Bc4 a6 14.Qa4+=) 13.Ne5+= Qc7 14.bc6 Nc6 15.cd5 ed5 (15...Ne5 16.Rc1 Qb8 17.de5 Be5 18.Be5 Qe5 19.de6 fe6=) 16.Bb5?? (16.Rc1 Be5 17.de5 Nd7+/–) 16...Ne7 (better is 16...Ne5!? 17.de5 Be5+=) 17.Qe2 a6 (17...Qc8 18.Rfc1 Qe6 19.Qd3+=) 18.Ba6+/– 1–0. Tiedemann,Joern (2125) – Huwer,Johannes (1765), RSS5E easy–81, 2009.

4.Nf3 f6 5.h3 (5.e3 e5=) 5...e5 6.e3 Qd6 (6...a6 7.a4=+) 7.a4 Qc5 (7...a6!?=) 8.Nc3+= a6? (better 8...Qd6+=) 9.Ba3+- ab5?? (9...Qa3 10.Ra3 Ba3 11.Nd5 Ra7+-) 10.Bc5 Bc5 11.ab5 (11.Nd5 Ra7 12.ab5 Bc2+-) 11...Ra1 12.Qa1 Nd7 (12...Ne7 13.Qa8 Kd7 14.Nd5 Bc2 15.Qb7 Nd5 16.Qd5 Ke7 17.Bc4+-) 13.Nd5 Bd6 14.Qa8 Kf7 15.Bc4 Be6 16.d3 (16.Qd8 Nf8 17.Nc7 Bc7 18.Qc7 Ne7+-) 16...g5 17.Qd8 Kg7 (17...Nf8 18.Nd2 Ne7 19.Nc7 Bc7 20.Be6 Ke6 21.Qc7 Kf7+-) 18.Qa8 (better 18.Nc7 Bb4 19.Ke2 Bc4 20.Qd7 Bf7 21.Ne6 Kg6 22.Neg5 Ne7+-) 18...Ne7?? (18...Kf7 19.Nf6 Kf6 20.Be6 Ke6 21.Qe8 Kf6 22.Qd7 h6+-) 19.Qa2+- Bd5 20.Bd5 Nd5 21.Qd5 Nc5 22.0-0 (22.d4 ed4 23.Nd4 Be5+-) 22...h5 (22...Rd8 23.e4+-) 23.Nh2 (23.d4 ed4 24.ed4 Na4+-) 23...g4 (23...Rd8 24.e4+-) 24.hg4 hg4 25.g3 f5 (25...Rh6 26.d4 Nd7 27.Ng4+-) 26.f4 (26.d4 ed4 27.Qf5 d3 28.cd3 Rf8 29.Qg4 Kf7+-) 26...ef4 (26...gf3 27.Nf3 Rf8 28.Nh4+-) 27.ef4 (27.Qf5 Rf8 28.Qg5 Kf7 29.Ng4 Ke8+-) 27...Re8 (27...Kg6 28.d4 Ne4 29.Ng4+-) 28.Qf5 Ne6 29.Ng4 Bc5 30.Kg2 Nd4 31.Qf6 Kg8 32.Nh6 Kh7 33.Qf7 Kh6 (33...Kh8 34.Qe8 Bf8 35.Qf8 Kh7 36.Qf7 Kh6 37.Rh1) 34.Rh1 1-0. poputchik (1670) - heydar_chaloos (1630), Rated Classical game, lichess.org, 2013.

4.c4 e6 5.Nf3 (5.e3 Nf6=+) 5...Nd7 (5...Nf6 6.e3=+) 6.e3 (6.d3 Ngf6=) 6...Bb1 (6...Ngf6!?=+) 7.Qb1= Ngf6 8.a4 (8.cd5 ed5 9.Be2 Bd6=) 8...Be7 (8...Bd6 9.cd5 ed5 10.Be2=) 9.a5 (9.cd5 ed5 10.Be2 Ne4=) 9...b6 (9...Bd6 10.Be2+=) 10.Bd3 (10.Be2 0-0=) 10...0-0 (10...ba5 11.cd5 ed5 12.Bc3=) 11.0-0 (11.a6 Bd6=) 11...Qc7 (11...ba5 12.cd5 ed5 13.Bc3=) 12.Ng5 (12.Bc3 Bd6+=) 12...h6= 13.ab6 ab6?? (better 13...Nb6 14.Nh7 Ng4+=) 14.Bh7+- Kh8 15.Nf7 Rf7 16.Ra8 Rf8 17.Rf8 Nf8 (17...Bf8 18.Bd3+-) 18.Bd3 N6d7 (18...Qd6 19.Qc2+-) 19.Qc2 Bf6 20.Bf6 Nf6 21.Ra1 Qb7 22.Be2 g5 (22...N8d7 23.cd5 ed5 24.d4+-) 23.Bf3 (23.d4 cd4 24.ed4 dc4 25.Bc4 Qc7+-) 23...Kg7 (23...g4 24.Be2+-) 24.Ra6 (24.Qc3 Qf7+-) 24...N8d7 (24...g4 25.Be2+-) 25.Qc3 (25.Qa2 g4 26.Ra7 Qb8 27.cd5 gf3 28.de6 Qd6+-) 25...g4 (25...Kf7 26.d4+-) 26.Bg4 (26.Bg4 d4 27.ed4+-) 1–0. GuestGTKQ – thesaltydog, freechess.org, 2018.

4.bc6 Nc6 5.c3 e5-/+ 6.f3 (6.Nf3 Nf6-/+) 6...Bc5 7.g4?? (better is 7.e3-/+) 7…Qh4# 0–1. Schlaeger,Michael (2270) – Moeller,Dirk (2345), remoteschach.de, 2006.

4.a4 (--> 1.b4 c6 2.Bb2 d5 3.a4 Bf5 4.b5).

4.bc6 Nc6=+ 5.e3 e5 (5...Qb6 6.Ba3-/+) 6.Bb5 (6.Nf3 f6=+) 6...Qb6 7.a4 (7.Nc3 Nf6=+) 7...a6 8.Bc6 bc6 (better is 8...Qc6!? 9.Nf3 Bc2 (< 9...Qc2 10.Qc2 Bc2 11.Be5=) 10.Ne5 Bd1 11.Nc6 Ba4=+) 9.Be5= f6 10.Bg3 (10.Bc3 Bd6=) 10...Bc5 (better is 10...Qb2!? 11.Nc3 Bc2=) 11.Ne2 Qb2 12.Nbc3 Bc2 13.Qc1 Qc1 14.Rc1 Bd3 (better is 14...Bb3+/–) 15.0-0?? Ba3 16.Rce1 Nh6 17.Na2 Nf5 18.Nac3 Ng3 19.hg3 h5 20.Kh1 h4 21.g4 h3 22.g3? Bd6 23.Rb1 Be5 24.Rb7 Bc3 25.dc3 Be2 26.Rfb1 Bf3 27.Kh2 Rd8 28.Rc7?? Bg2?? 29.Rbb7= 0-0?? 30.Rg7 Kh8 31.Rh7 Kg8 32.Rbg7# 1–0. pinecrest1981 – bueno, Live Game Caissa's Web, 2005.

4.e3 Nf6 5.Nf3 c5 6.c4 e6 7.Nc3 h6 8.Nh4 Bh7 9.d3 (9.cd5 ed5 10.Nf3 d4=) 9...Be7 (9...d4 10.ed4 cd4 11.Nb1+=) 10.Be2 Nbd7 (10...d4 11.ed4 cd4 12.Nb1+=) 11.Nf3= 0-0 12.0-0 Qc7 13.Nd2 e5 (better is 13...Ne5!? 14.Qb3 Rfd8 15.cd5 ed5=) 14.cd5+/– Rfd8 15.e4 b6 16.a4 Ne8 17.Nc4 Nd6 18.Bg4 Nf6 (better is 18...Bg5+/–) 19.Bc1?? (better is 19.Ne5 Ng4 20.Qg4+- (20.Ng4?! f5+-)) 19...Nc4+= 20.dc4 Bd6 (20...Ne4 21.Ne4 Be4 22.Re1+=) 21.Bf5 (21.Qf3 Ng4 22.Qg4 f5 23.ef5 Rf8+/–) 21...Re8?? (better is 21...Bf5 22.ef5 e4=) 22.Bh7 Kh7 23.Qd3 Kg8 24.Qg3 Kh7 25.Bd2 Nh5 26.Qh3 Nf4 27.Bf4 ef4 28.g3 (28.Rfe1!?+-) 28...Be5+/– 29.Rac1 g6 30.Kg2 (30.Qg2 a6+/–) 30...Kg7 (30...Bc3!? 31.Rc3 Re4 32.gf4 Qf4=) 31.Ne2 Re7 32.f3 a6 33.g4 (33.gf4 Bf4 34.Nf4 Qf4+/–) 33...a5 (33...Qd6 34.Rc2+=) 34.Kf2 Rh8 35.Qg2 g5 (35...Qd6 36.Kg1+/–) 36.Rh1 Ree8 37.h4 Rh7 (37...f6!?+/–) 38.hg5+- hg5 39.Rh7 Kh7 40.Qh3 Kg8 41.Rh1 Qd6 42.Qh7 Kf8 43.Rh6 Qd8 44.Qf5 Kg7?? (better is 44...Bg7 45.Rh1 Re5+-) 45.Rh7 Kg8 46.Qf7 1–0. mic (2340) – pops (2530), net–chess.com, 2016.

4.Qb3 Nf6 5.e3 Be7 6.Nf3 0-0 7.d4 a5 (7...dc4 8.Bc4 Nc6 9.a3=) 8.ba5 Nc6 9.Nbd2 (9.Bc3 Qc8=+) 9...Na5-/+ 10.Qc3 dc4 11.Bc4 Nd5 12.Bd5 ed5 13.0-0 (13.Ba3 Ba3 14.Qa3 Nc4=+) 13...c6 (13...Nc6 14.a4=+) 14.Rfe1 Re8 15.e4 (15.Ba3 Ba3 16.Qa3 Nc4=+) 15...de4 16.Ne4 Qd5 (16...b6 17.Re2=+) 17.Ng3= f6 18.Nf5 Qf5 19.Rac1 Qd5 20.Ba3 Ba3 21.Qa3 Nc4 22.Re8 Re8 23.Qb3 Nd6 24.Qd5 cd5 25.Kf1 Ra8 26.Rc2 Nc4 27.Nd2 b5 28.Ke2 Kf7 29.Kd3 Ke6 30.Nb3 Kd6 31.Re2 b4 32.Rc2 Kc6 33.Nc1 Ra3 34.Ke2 Kb5 35.Ke1 Rc3 36.Rc3 bc3-/+ 37.Ke2 Nb2 38.Ke3 Kb4 39.f3 Ka3 40.Ne2 Nd1 41.Kd3 Kb2 42.a4 c2 43.a5 Nc3!! 44.a6 Ne2 45.a7 c1Q 46.a8Q Nf4# 0–1. Radaikin,Vitaley – Byrne,Robert E, US–op Lincoln, 1969.

4.cd5 ed5 5.e3 Nf6 (5...Bb4?? 6.Bg7 d4 7.Bh8 de3 8.fe3+-) 6.Nf3 Nbd7 (worse is 6...Bb4 7.Qa4 Nc6 8.Nd4 Bb1 9.Nc6 bc6 10.Rb1+/–) 7.b5 Bb4 (7...Nc5 8.Ba3+=) 8.Nd4= Bg6 9.Be2 0-0 10.0-0 Nc5 11.Nc2 White gets in control 11...Ba5 12.Ba3 Bb6 (12...Nfd7 13.d4 Qf6 14.Nb4+/– (worse is 14.Bc5 Nc5 15.Bh5 Bd3+=)) 13.d4+- Nce4 14.Bf8 Kf8 15.f3 Nd6 16.Bd3 Bd3 17.Qd3 Qd7 18.a4 c5 19.bc6 Qc6 20.a5 Bc7 21.Nb4 Qc4 22.Nd2 Qd3 23.Nd3 Re8 24.Rfe1 Nf5 (24...Nc4 25.Nc4 dc4 26.Nc5+/–) 25.Nf1+- Nd6 26.Rec1 Nc4 27.Nb2 Bh2 28.Kh2 Nb2 29.Rab1 Nc4 30.Rb7 Na5 31.Ra7 Nc4 32.e4 Nb6 33.Rcc7 Nfd7 34.e5 Ke7 35.Rcb7 Ke6 36.Ng3 g6 37.Ne2 g5 38.Ra6 (38.Ra6 Ra8 39.Rab6 Nb6 40.Rb6 Ke7 41.Nc3+-) 1–0. Woelfelschneider,Peter – Damar, 2009.

4.e3 e6 5.c4 c6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5).

4.e3 e6 5.Nf3 Bd6 6.c4 dc4 7.Bc4 Nbd7 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5 Bd6).

4.e3 Bd6 5.Qf3 Bg6 (better 5...Ne7!?=+) 6.Qd5= Nf6 (better 6...Nc6!?=) 7.Qb7+/- Be4 8.Qb5 Bc6 9.Qe2 0-0 10.Nf3 Ne4 (10...Nbd7 11.d3+/-) 11.c4 Bb4 12.Be5 Re8 13.g3?? (better 13.a3 Ba5 14.Bb2+/-) 13...Ng5-+ 14.Bg2 Re5! 15.Ne5 Bg2 16.Rg1 Qf6 (better 16...Be4 17.Nc3 Bc3 18.dc3 Nc6 19.Nc6 Bc6-+) 17.Qd3?? (better 17.f4 Be4 18.a3 Nf3 19.Nf3 Qa1 20.Kf2 Bb1 21.ab4-/+) 17...Qe5-+ 18.Qd8 (18.Rg2 Qa1 19.f4 Ne6-+) 18...Bf8 19.Nc3 Nf3 20.Ke2 Ng1 21.Rg1 Qh5 22.Ke1 Qh2 (better 22...Na6 23.Qh4 Qf3 24.Qf4-+) 23.Rf1 (23.Rg2 Qg2 24.Nd5-+) 23...Bf1 (23...Na6 24.Qh4 Qh4 25.gh4 Bf1 26.Kf1-+) 24.Kf1 Qh1 25.Ke2 Nc6 26.Qa8 (26.Qc7 Re8 27.Qd7 Rd8-+) 26...Nd4! 27.ed4 Qa8 0-1. Felixrbran – NN, Rated Correspondence game, lichess.org, 2013.

4.g3 Nf6 5.Nf3 Bd6 6.e3 (6.c4 dc4 (6...Bb4?! 7.Qa4 Nc6 8.Ne5=) 7.Bg2 Nbd7-/+ (worse 7...Bb4 8.Qa4 Nc6 9.Ne5 Bb1 10.Rb1 Bd2 11.Kf1+=)) 6...Bg4 (6...Nbd7 7.d3-/+) 7.Be2 (7.h3 Be6-/+) 7...Nc6 (7...a5 8.b5-/+) 8.b5 Na5 9.c4 (9.Ba3!?-/+) 9...Nc4-+ 10.Bc4 dc4 11.Be5?? (better 11.h3 Bf5 12.Be5 Be5 13.Ne5-+) 11...Be5 12.d4 (12.h3 Bf3 13.Qf3 Ba1 14.Qb7-+) 12...Bd6 (better 12...cd3 13.Nbd2 Bc3 14.0-0 Bd2 15.h3 Bh3 16.Qd2-+) 13.b6 (13.h3 Bd7-+) 13...c6 (13...Bb4 14.Kf1 Bh3 15.Kg1 ab6 16.Ng5-+) 14.0-0 (14.h3 Bf3 (14...Qb6?! 15.hg4 Qb4 16.Ke2-+) 15.Qf3 Qb6-+) 14...Qb6 (14...Ne4 15.h3 Bh3 16.Qc2-+) 15.Nc3 (15.Nbd2 c3 16.Nc4 Qd8-+) 15...0-0-0 (15...Qa5 16.Rc1 Ba3 17.Qe2-+) 16.Qe2 (16.Qc2 Qa5 17.Nd2 Bf5-+) 16...Qc7 (better 16...Qa5 17.Rfc1 Ba3 18.Kg2 Bc1 19.Rc1-+) 17.Kg2 Qd7 18.Qc4 (18.Rfb1 Qf5-+) 18...Bf3 (18...Bh3 19.Kg1 Qf5 20.Nh4 Bf1 21.Qf1-+ (21.Nf5?? Bc4 22.Nd6 Rd6-+)) 19.Kf3 Qg4 (19...Qh3!? 20.Ke2-+) 20.Kg2 h5 (20...Rd7 21.Qa4 a6 22.Qa5-+) 21.Qf7 h4 22.Rab1 (22.h3 Qg5 23.g4-+) 22...h3 (22...Rd7 23.f3 Qh3 24.Kh3 hg3 25.Kg2 Rh2 26.Kg1 Rf7 27.f4-+) 23.Kg1 Qf3 (better 23...Rd7 24.f3 Qg5-+) 24.Qb7 1-0. felixrbran - wiles (1745), Rated Correspondence game, lichess.org, 2013.

4.Na3 Nf6 (4...Nc6 5.Nc4 Nf6 6.Nf3=) 5.Nc4 e6 6.Qa4 (6.a3 Be7=) 6...c6 (6...Nbd7 7.Nf3=+) 7.b5 (7.Ne3 Bg6=+) 7...a6-/+ 8.b6 (8.bc6 b5 (8...bc6?! 9.f3+=) 9.Qa5 Nc6 10.Qd8 Rd8-/+) 8...Nd5 9.Bd4? (better is 9.Nf3-/+) 9...Nb4-+ (Black gets deadly initiative) 10.Bc3 (10.Be5 Nc2 11.Kd1 Na1 12.Ba1 Nd7-+) 10...Nc2 11.Kd1 Na1 12.Ba1 Nd7 13.Bd4 (13.Qb3 f6-+) 13...Nc5 14.Bc5 Bc5 15.Qb3 (15.e3 a5-+) 15...Bf2 (16.e3 0-0-+) 0–1. Boettcher,Frank – Borrmann,Fritz, corr 3GMM½–02, 1998.

4.Nc3 c6 5.e4 Bg6 (5...Be6 6.Nf3=) 6.Bc4+= e6 Covers d5 7.Nf3 Bb4 8.Qb3 White threatens to win material: Qb3xb4 8...Qe7 9.a3 Bc3 10.Bc3 (10.dc3 Inferior is 10...Be4 11.Ne5 Nf6-+) 10...Be4?? gives the opponent counterplay (better 10...Nf6 would be a reprieve 11.Bf6 gf6=+) 11.Bg7+- Bf3 12.gf3 (12.Bh8?! is clearly weaker 12...Bd5 13.Bd5 cd5+-) 12...b5 13.Be2 (13.Bh8?! is clearly worse 13...bc4 14.Qc4 Qc7+-) 13...f6 (13...Nd7 does not help much 14.Bh8 Qd6 15.Rc1+-) 14.Bh8 Nd7 15.Rg1 0-0-0 (15...Nh6 does not save the day 16.Rc1 Qd6 17.Bf6+-) 16.a4 (16.Rc1 keeps an even firmer grip 16...Qd6 17.Qb5 Nb8+-) 16...Nc5 (16...b4 cannot undo what has already been done 17.Qe3 Kb8 18.Rb1+-) 17.Qc3 (better 17.Qe3 and White can already relax 17...Nh6 18.Qh6 Rh8 19.ab5 cb5 20.Rg7+-) 17...Na4 (17...b4 what else? 18.Qe3 Qd6+-) 18.Qc6 Qc7 19.Qc7 (better 19.Qe6 secures the win 19...Kb8 20.Rg8 Rg8 21.Qg8 Qc8 22.Qc8 Kc8 23.Bb5 Nb6 24.Rc1 Kb7 25.Bf6 a5+-) 19...Kc7 20.Bb5 Kd6 (20...Nc5 there is nothing else anyway 21.Rg7 Kd6 22.Raa7 Kd5+-) 21.Ra4 (21.Ra4 Rf8 22.Ra7+-) 1–0. AvImd (1735) – charnock (1845), lichess.org, 2020.

4.Nd2 e6 5.a3 c5 6.b5 Bd6 7.Ngf3 Nbd7 (--> 3.d3 Nd7 4.Nd2 Ngf6 5.Ngf3 e6 6.a3 c5 7.b5 Bd6).

4.e4 de4 5.Nc3 Bg4 6.Be2 Be2 7.Qe2 e5 (7...ed3!? 8.cd3 Nc6-/+) 8.de4 Bb4 9.Nf3 Nc6 10.Ng5? (10.a3!? Bc3 11.Bc3-/+) 10...0-0 (better is 10...Qd4 11.Qd3 h6-+) 11.0-0-/+ Bc5 12.Nd5 (12.Rfd1!? Nd4 13.Qd3-/+) 12...Nd5-+ 13.ed5 Qd5 14.Rad1? (14.Rfd1!? Nd4 15.Qd3+=) 14...Nd4 (14...Qa2 15.Qd3 g6 16.Qb5-+) 15.Bd4? (better is 15.Qd3!? g6 16.c3-/+) 15...ed4-+ (15...Bd4?! 16.c3=) 16.Qh5?? (16.Nf3 Rfe8 17.Qb5 a6-+) 16...Qf5 (better is 16...h6-+) 17.g4 Qc2?? (better is 17...Qg6 18.Qg6 hg6-+ (18...fg6?! 19.Ne6 b6 20.Nf8 Rf8 21.Kg2+=)) 18.Rc1= Qa2?? (better is 18...Qg6 19.Qg6 hg6 20.Rc5 c6+=) 19.Qh7 1–0. TD_6 – babylyub, ICS rated blitz match, 1998.

4.Nf3 e6 5.a3 Nbd7 6.Nbd2 (--> 3.d3 Nd7 4.Nd2 Ngf6 5.Ngf3 e6 6.a3).

4.a3 e6 5.Nf3 Bd6 6.e3 Nf6 7.h3 a6 (7...0-0 8.Bd3=+) 8.Nc3 0-0 9.Bd3 Bd3 10.Qd3 Nd7 (10...Qe7 11.Ne2=+) 11.h4 (11.e4 de4 12.Ne4 Nf6=) 11...f5 12.0-0 (better is 12.Ne2=+) 12...e5 (better is 12...Nb6-/+) 13.de5+= (13.Nd5? e4 14.Qd1 ef3-+) 13...Nce5 14.Ne5 (14.Qd5 Kh8 15.Ng5 Qe7+=) 14...Ne5= 15.Qd4 (better is 15.Qd5!? Kh8 16.Nb5=) 15...c6 16.f4 (better is 16.Nd5 cd5 17.f4=+) 16...Ng6?? (better is 16...Ng4!? 17.Nd1 Rf7-+) 17.Ne4?? (better is 17.h5 Ne7 18.Nd5+-) 17...Rf7 18.Ng5 Re7 19.Ne6? (better is 19.c4=) 19...Qd7-/+ 20.Ng5 (20.Ng7 Rg7 21.h5 Nf8 22.Qg7 Qg7 23.Bg7 Kg7-+) 20...h6 (20...Nh4!? 21.c4 h6-+) 21.Nf3-/+ Re4 22.Qd2 Be7 23.h5 Nh4 (23...Nf8 24.Qe1=+) 24.Nh4?? (better is 24.Ne5 Qe8 25.g3+=) 24...Bh4-+ 25.Rf3 Qf7 26.Qc3 Bf6 27.Qb3 Bb2 28.Qb2 Qh5 29.Rh3 Qe2 30.Rg3 Re7 31.Qf6 Rae8 32.Qh6 Rf8 (32...Qe3 33.Re3 gh6 34.Re7 Re7 35.Kf2-+) 33.Qh3 Rf6 (33...Qc2 34.Qh4 Re6 35.Rh3-/+) 34.Rf1 Qc2 35.Qh2 Kf7 (better is 35...Qc3 36.Rh3 Rh6-+) 36.Qh5 Ke6 37.Rg6 (better is 37.Qh8-/+) 37...Rg6-+ 38.Qg6 Kd7 39.g4 Qe4 (39...Qc3 40.Qf5 Kc7 41.Qg5 Qe3 42.Kg2-+) 40.Re1 fg4 41.Qg4 Kc7 42.Kf2 Qd3 43.f5 Qa3 44.Qf4 Kc8 45.Qd6 Rd7 46.Qf8 Kc7 47.Rh1 Qb2 48.Kf3 Qe5 49.Rh4 (49.Rh8 Qe4 50.Kf2 Qc2 51.Ke1 Qc3 52.Ke2 Kb6-+) 49...Qf6 (50.Qf6 gf6-+; better is 49...Re7 50.e4-+) 0–1. PoPer – Armor, Live Game Caissa's Web, 2004.

4.a3 Nf6 5.e3 e5 (better is 5...e6!?+=) 6.de5+/– Ne4 7.Bd3 g6 (better is 7...Qg5 8.g3 0-0-0+=) 8.f3?? (8.Nf3 Qe7+/–) 8...Ng5?? (better is 8...Qh4 9.g3 Ng3 10.hg3 Qh1-+) 9.e6 Bd3 10.Bh8 (10.cd3?! f6+=) 10...Bc2?? (better is 10...Bc4 11.ef7 Nf7+-) 11.Qc2 Ne6 12.Bb2 Qd6 13.Nd2 0-0-0 14.Ne2 d4 15.ed4 Bg7 16.Ne4 Qd5 17.0-0 Ncd4 18.Nd4 Nd4 19.Bd4 Bd4 20.Kh1 Ba1 21.Ra1 Qd3 22.Qd3 Rd3 23.Ng5 Rd2 24.Nf7 Kd7 25.Ng5 c6 26.Nh7 b5 27.Ng5 Kd6 28.Ne4 Ke5 29.Nd2 a6 30.Re1 Kd4 31.Rc1 Kd3 32.Ne4 g5 33.Rc6 g4 34.Ra6 gf3 35.gf3 Ke3 36.Kg2 Kf4 37.Rb6 Ke5 38.Rb5 Kd4 39.a4 Ke3 40.a5 Kf4 41.a6 Ke3 42.a7 Kd4 43.a8Q Ke3 44.Qa7 Kf4 45.Qf7 Ke3 46.Rd5 Ke2 47.Rd2 Ke3 48.Qb3 Kf4 49.Nf2 Kf5 50.Qd5 Kf4 51.Rd4 Ke3 52.Qe4 (52.Qe5) 1–0. Fournier,Frederic (1690) – juju13 (1625), Active (3/0), 2005.

4.b5 a4 5.Nf3 e6 6.Be2 Nf6 7.Nh4 Bg6 8.0-0 Bd6 9.f4 Ne4 (9...a3 A) 10.Ng6?? ab2 (10...hg6?! 11.Bd4=) 11.Nc3 ba1R 12.Qa1 hg6-+; B) 10.Be5=) 10.Ng6+= hg6 11.Bg7 Rh7 12.Bd4 (12.Bb2=) 12...Qe7 (better 12...Qh4!? 13.h3 g5=) 13.d3+- Nc5 14.Nc3 g5 15.Qd2 Nbd7 16.g3 e5?? (better 16...gf4 17.ef4 0-0-0+=) 17.fe5+- (17.Nd5?! Qe6 18.fe5 Be5 19.Be5 Qe5+-) 17...Ne5 (17...Be5 18.Be5 Qe5+-) 18.Nd5 Qd7 (18...Qe6 19.Nf6 Kd8 20.Nh7+-) 19.Nf6 Kd8 20.Nd7 Kd7 (20...Ncd7 21.e4 f6 22.Be5 Be5 23.d4+-) 21.Qc3 Rah8 22.Be5 Rh2 23.Bg4 Kd8 24.Bh8 1–0. DEFFM – guestkasparof, freechess.org, 2018.

4.b5 c5 5.Nf3 e6 6.Be2 Nf6 7.a4 (7.Nh4 Bg6+=) 7...Bd6= 8.c4 (8.Nh4 Bg6=) 8...Nbd7 (8...0-0 9.Nh4=) 9.0-0 (9.Na3 h6=) 9...0-0 (9...dc4 10.Na3=) 10.d3 (10.Nh4 Be4=+) 10...h6 (10...dc4 11.dc4 Qc7 12.Bd3=+) 11.Nbd2 Qe7 12.Qc2 b6 (12...Rad8 13.e4 Bg4 14.ed5 ed5 15.Rae1=) 13.Rfe1 (13.e4 Bg4=) 13...Bh7 14.Nf1 e5 15.N3d2 Bc7 16.g3 Rad8 17.cd5 Nd5=+ 18.e4 Nb4 19.Qb3 Nf6 20.Nc4 Rfe8 21.Nfe3 Qe6 22.Rad1 Rd7 23.Qc3 Bg6 24.Kg2 h5 25.h3 Kh7 26.g4 Kg8 27.g5 Nh7 28.f4 Na2 29.Qb3 ef4-/+ 30.Nf5 Ng5 31.h4 Bf5 32.hg5 Bg4 33.Kf2 Be2 34.Re2 Qh3 35.Rg1?? Nb4 36.Rd2 Rd3 37.Qd1 Re4 38.g6 f6 39.Rh1 Qg3 40.Kf1 Qf3 41.Qf3-+ Rf3 (42.Kg2 Rg3 (42...Rc4 43.Kf3 Rc2 44.Re1=) 43.Kf1 Nd3-+) 0–1. Semenko,Georg(Jurko) (1750) – Kunte,Herbert, 4 sen. Bay EM Schney, 1992.

4.b5 c6 5.c4 b6 (5...e6 6.bc6 bc6 7.Nf3=) 6.a4 (6.Qa4 Qd7+=) 6...e6 7.Nf3 Nf6 8.Be2 g6 (8...dc4!? 9.Bc4 Bg4=) 9.0-0 Bg7 10.Na3 0-0 11.Nh4 (11.Nd4 c5 12.Nf5 gf5+/–) 11...dc4 (better is 11...Ng4! 12.Bg7 Qh4 13.Bg4 Bg4= (< 13...Kg7 14.Bf5 ef5 15.Qb3+/–)) 12.Nf5+/– ef5 13.Bc4 Qc7 14.Bf6 Bf6 15.d4 Rd8 (15...c5 16.Rc1+/–) 16.Rc1 (16.bc6 Nc6 17.Rc1 Be7+-) 16...Qd6 (16...c5!?+/–) 17.Qb3+- Rd7 18.bc6 Nc6 19.Qb6 Rb8 20.Qc6! Qc6 21.Bf7! Kf7 (21...Rf7 22.Rc6) 22.Rc6 Be7 23.Nc4 Bb4? (23...Rd5+-) 24.Ne5 (24...Ke7 25.Nd7 Kd7 26.Ra6+-) 1–0. Labahn,Wolfgang – Schilke,R, BSW–Jugend Qual, 1982.

4.b5 f6 5.Nf3 =.

4.bc5 Nc6 5.Nf3 Nb4 6.Bb5+- Bd7 7.Bd7 Qd7 8.0-0 e6 9.Ne5 Qc7 10.c4 Nf6 11.cd5 Nbd5 12.Qa4 Nd7 13.d4 (13.Rc1 f6 14.Nd3 Qc6+-) 13...Be7? (better 13...b5 14.Qb5 Rb8 15.Qd7 Qd7 16.Nd7 Kd7+-) 14.Na3 f6 15.Nb5 Qb8 (15...Qc8 16.Nd7 Qd7+-) 16.Nd6 (16.Nd6 Qd6 17.cd6 fe5 18.de7 Ne7 19.de5+-) 1-0. DEFFM – GuestSNXD, freechess.org, 2021.

4.bc5 Nc6 5.Nf3 Nf6 6.Bb5 e6 (6...Ne4+=) 7.0-0 (better is 7.Nd4!? Rc8 8.Nf5 ef5 9.Qf3+/–) 7...Bc5= 8.d4 (8.Bd4 Bd6=+) 8...Bd6=+ 9.c4 dc4 10.Nbd2 Bd3 11.Re1 Bb4 12.Qa4 Bd2 (12...0-0 13.Bc6 Bd2 14.Nd2 bc6 15.Nc4 Bc4 16.Qc4=) 13.Nd2+= Qd7 14.Nc4 0-0 15.Ne5 (15.Rad1 Bc4 16.Qc4 Rfc8+=) 15...Bb5= 16.Nd7? (better is 16.Qb5 Ne5 17.Qe5=) 16...Ba4-/+ 17.Nf8 Kf8 18.a3 Rd8 19.Rab1 Ne4 20.Re2 a6 21.f3-/+ Nf6 22.Bc3 Bb5 23.Ra2 Nd5 24.Bb4? Ke8 25.Rc1? Ne3 26.Bc5 Nd5 27.a4 Bd3 28.Rb2 Rb8 29.Bb6 Nb6 30.Rb6 Nd4 31.Rd1 Ne2 32.Kf2 Nf4 33.Rd2 Rd8 34.Ke3?? Nd5 35.Kd3 Nb6 36.Ke2 Rd2 37.Ke3 Rg2 0–1. gtate (1800) – wmalone (1825), net–chess.com, 2002.

4.d3 Bg6 5.Nf3 e6 6.Ne5 Nd7 7.Ng6 hg6 8.a3 Ngf6 9.Nd2 Bd6 10.g3 c6 11.Bg2 Qe7 12.0-0 a6 13.c4 Rd8 14.Re1 0-0 15.Qf3 dc4 16.Nc4 Bc7 17.g4 Nd5 18.h4 b5 19.Na5 Ba5 20.ba5 Qh4 21.Re4 Qg5 22.Rae1 Rc8 23.Bc1 Qd8 24.g5 Nc5 25.Rh4 Ne7 26.Qh3 Normal 1-0. ZibbitVideos (2345) - bicyclethief (2065), Rated Bullet game, lichess.org, 2015.

4.f3 Bg6 5.c4 e6 6.a3 (6.cd5 Qh4 7.g3 Qb4-/+) 6...Nf6 (6...dc4 7.Nh3-+) 7.Nc3 (7.c5 Nbd7-/+) 7...d4-+ 8.Nce2 e5 9.Ng3 c5 10.b5 Bd6 11.d3 (11.Qb3 0-0-+) 11...0-0 12.Ne4 b6 (12...Ne4 13.fe4 f5 14.ef5 Bf5 15.Nf3-+) 13.Ne2 Bc7 14.N2g3 Nbd7 15.Be2 Ne8 16.0-0 f5 17.Nf2 Nd6 18.a4 (18.Qa4 Qh4-+) 18...a5 19.Bc1 Qf6 20.Nh3 h6 21.Bd2 Rae8 Black prepares the advance e4 22.Qc1 Bh7 23.Qc2 Qg6 (23...Qh4 24.Rae1-+) 24.Rae1 (24.f4!? Qf6 25.fe5 Ne5 26.Bh5-/+) 24...Nf6-+ Black prepares e4 25.Qc1 e4 (better 25...f4!? 26.Ne4 Nf5-+ (26...Nfe4?! 27.fe4 Bd8 28.Qd1-/+; worse 26...Nde4 27.fe4 Kh8 28.Kh1-/+)) 26.fe4=+ fe4 27.de4 (better 27.Nf4!? Qf7 28.Nd5-/+) 27...Nfe4 28.Bd3 Rf1 29.Rf1 Qe6 30.Qc2 (30.Nf4 Qg4 31.Qc2 A) 31...Nd2 32.Bh7 Kh8 33.Ng6 Qg6 34.Bg6 (34.Qg6?! Nf1 35.Nf1 Re7+-) 34...Nf1 35.Be8 (worse 35.Nf1 Re6+-; worse 35.Kf1 Rd8+-) 35...Ng3 36.Bg6+-; B) 31...Kh8 32.Ne4 Ne4-/+) 30...Kh8 (30...Nd2!? 31.Bh7 Kh8 32.Qd2 Kh7 33.Qc2 Kg8-+) 31.Nf4-/+ Qg4 32.Ne4 Ne4 33.Nd5 (33.Bc1 Nc3 34.Bh7 Bf4-/+) 33...Nd2 (better 33...Bh2 34.Kh2 Qg3 35.Kg1 Nd2 36.Qd2 Bd3-+) 34.Qd2-/+ Bd3 35.Qd3 Bb8 (35...Bd8 36.Rf4 Qe6 37.Rf1=+) 36.g3 (36.Nb6 Bd6=) 36...Bd6 37.Nb6 (37.Nb6 Re3 38.Qc2-+). zembelek (2045) - 147a (2130), Rated Blitz game, lichess.org, 2014.

4.ba5 c5 5.e3 Ra5 6.c4 e6 7.Be2 Nc6 8.Bc3 Ra7 9.0-0?? (9.cd5 ed5 10.Bb5 Nf6=) 9...Nf6?? (better is 9...d4-+) 10.d4= b6 (10...dc4 11.Bc4 Bg4 12.Be2=) 11.Nbd2 Bd6 12.Nh4 (12.dc5!? bc5 13.cd5 Nd5 14.Bg7+=) 12...Ne4+= 13.Ne4 Bh2 14.Kh2 Decoy to h2 14...Qh4 A double attack 15.Kg1 Be4 (worse is 15...Qe4 16.dc5 bc5 17.cd5 Qd5 18.Bb5+=) 16.f3 Bf5 (16...Qh6 17.Bd2 Bg6 18.cd5 ed5+=) 17.cd5 ed5 18.Bb5 Qh6 19.Bc6?? (better is 19.Re1+/–) 19...Qc6-/+ 20.dc5 bc5 (worse is 20...Qc5 21.Bg7 Rg8 22.Bd4=) 21.Bg7 Rg8 22.Bc3 Qg6 Threatening mate... how? 23.Rf2 Bh3 The pressure on the backward pawn g2 grows (better is 23...Qe6+=) 24.Qd5+- Bg2 The mate threat is Bxf3 25.Qe5 Kd7 26.Rd2 Kc8 27.Kf2?? (27.Rd6 Qd6 28.Qd6 Bf3 29.Kh2+-) ½–½. Labahn,Wolfgang – Schilke, 1981.

4.b5 a4 5.e3 e6 6.a3 f6 (6...Nf6 7.Be2=) 7.Be2 (7.Nd4 Nh6+=) 7...Bd6 (7...Nh6 8.Nd4 Bc5 9.Nf5 Nf5 10.c4+=) 8.Nd4+= Qd7 (8...Nh6 9.g4 Be4 10.f3+=) 9.Nf5+- ef5 10.c4 Be5 (better 10...dc4!? 11.Bc4 Nh6+-) 11.d4+- Bh2? (better 11...Bd6+-) 12.Rh2 Qd6 13.g3 Ne7 14.Nc3 c6 (14...Nd7 15.Na4 h6 16.cd5 Nd5 17.Bc4+-) 15.bc6 bc6 16.Na4 Nd7 17.cd5 Nd5 18.Bh5 Ke7 19.Qc2 g6 20.Bf3 h5 21.Rc1 (21.Rh3 Rhb8 22.Nc3 N7b6+-) 21...Rhb8 22.Nc5 Rb6 (22...Nc5 23.dc5 (worse 23.Qc5 Rb2 24.Bd5 cd5=+) 23...Qe6 24.Rd1+-) 23.Kf1 Kf7 (23...Rab8 24.Rb1+-) 24.a4 Nf8 (24...Ke8 25.Ba3 Rbb8 26.e4 fe4 27.Qe4 Kf7 28.Bh5 Ne3 29.fe3 gh5 30.Qh7 Ke8 31.Qg6 Kd8 32.Nb7 Kc7 33.Bd6 Kb7 34.Qf7 Rf8 35.Qd7 Ka6 36.Qc6 Ka7 37.Bc5 Kb8 38.Rb2) 25.Ba3 Ne6 26.Ne6 (26.Kg1!? Kg7+-) 26...Qe6 27.Bc5 Rb7 28.Ra1 Rab8 (28...Ra5 29.Qd2 Ra8 30.a5+-) 29.a5 (better 29.Kg1!? Rb2 30.Qc1 R2b3+-) 29...Rb2 30.Qc1 (better 30.Bd5 cd5 (30...Rc2?? 31.Be6 Ke6 32.a6+-) 31.Qd1 Qa6 32.Kg2 R8b5 33.Rh5 gh5 34.Qh5 Kg7 35.Qf5 Rf2 36.Kf2 Rb2 37.Kg1 Qb7+-) 30...f4 (30...Ne3 31.Qe3 Qe3 32.fe3 Rh2+-) 31.ef4 Qf5 32.Qc4 (32.Kg2 R8b3 33.Ra3 Rc2+-) 32...Qe6 (32...R8b3 33.Ra3 Ra3 34.Ba3+-) 33.Qa6 Qd7 34.Re1 Kg7 35.Bd5 Qd5 36.Qa7 Kh6 (36...R8b7 37.Re7 Re7 38.Qe7 (38.Be7?? Rb1 39.Ke2 Qe4 40.Kd2 Rb2 41.Kd1 Qb1) 38...Kg8 39.Qe1+-) 37.a6 Qc4 (37...Qg8 38.Qe7 Rb1 39.a7 Re1 40.Qe1+-) 38.Kg1 Qg8 39.g4 (39.Qd7 Qd5 40.Qd5 cd5+-) 39...Re8 (39...Rb1 40.Qe7 Re1 41.Qe1+-) 40.Re8 (better 40.g5 fg5 41.fg5 Kg5 42.f4 Kh6+-) 40...Qe8 (40...Rb1 41.Kg2 Qe8+-) 41.g5! fg5 42.fg5 Kg5 43.f4! Kg4 (43...Kf4 44.Qc7 Double attack (44.Rb2 Discovered attack)) 44.Rb2 Qe1 45.Kh2 Qg3 46.Kh1 Qe1 47.Kg2 Qe4 48.Kg1 Qe1 49.Kg2 Qe4 50.Kf2 Qf4 51.Kg2 Qf3 (51...Qe4 52.Kf1 Qh1 53.Ke2 Qg2 54.Kd3 Qb2 55.Qd7 Kh4 56.Qc6 Qb1 57.Kc4 Qa2 58.Kb5 Qb3 59.Ka5 Qc3 60.Kb6 Qb3 61.Kc7 Qf7 62.Kd6 g5+-) 52.Kg1 Qe3 53.Rf2 Qe1 54.Kg2 Qe4 55.Kh2 Qe3 56.Qd7 Kg5 57.Be7 Kh6 58.Bf8 Kg5 59.Qe7 Qe7 60.Be7 (60.Be7 Kh6 61.a7 Kg7 62.a8Q g5 63.Qf8 Kh7 64.Rf7 Kg6 65.Qg7) 1–0. DEFFM – GuestHQQZ, freechess.org, 2018.

4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.Nf3).

4.e3 Nf6 5.c4 dc4 6.Bc4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 c6).

4.a3 Nd7 5.d4 (5.Nd4 Nh6=) 5...Ngf6 (5...Qg6 6.Nh4 Qf6 7.Nf5 Qf5 8.e3+=) 6.e3= e6 7.c4 dc4 (7...a5 8.c5 Qe7 9.b5=) 8.Bc4 Nb6 9.Bb3 (9.Bd3 Bd3 10.Qd3 Be7=) 9...Be7 10.Nbd2 (10.Bc2 Bc2 11.Qc2 0-0=) 10...0-0=+ 11.Ne5 a6 (11...a5 12.g4 Be4 13.Ne4 Ne4 14.Qb1=) 12.0-0 Rfd8 13.Rc1 (13.Bc2 Bc2 14.Qc2 Nbd5=) 13...c6 (13...a5 14.b5=+) 14.g4 (14.Bc2 Bc2 15.Qc2 a5+=) 14...Bg6 (14...Be4 15.g5 (15.Ne4?! Ne4 16.Qf3 Ng5=) 15...Bd5 16.gf6 Bf6 17.Qh5+-) 15.f4 (15.Qf3 Nbd5=) 15...Nbd5 (15...Be4 16.g5 (16.Ne4?! Ne4 17.Qc2 Nf6+=) 16...Bd5 17.gf6 Bf6 18.e4 Bb3 19.Qb3+-) 16.Qf3 (16.Ndc4 Qc7 17.Ng6 hg6 18.Qf3+/–) 16...h5 (16...a5 17.Ndc4 Be4 18.Nd6 Bf3 A) 19.Nf3 Bd6 20.ba5 Ne3-+; B) 19.Rf3?! Bd6 (19...Rd6 20.ba5 Ra5 21.Nc4+-) 20.ba5 Be5 21.fe5 Ng4=; C) 19.Ndf7?! Bg4 20.Nd8 Rd8+-; D) 19.Nef7?! Rd7 20.Rf3 Bd6 21.Nd6 Rd6+/–; E) 19.Nb7+-) 17.h3 (17.g5 Ng4 18.Ng6 fg6 19.Nc4+-) 17...hg4= 18.hg4 Bh7 19.e4 Nb6 (19...Nc7 20.g5 Ne4 21.Ne4 Be4 22.Qe4+-) 20.f5+/– Nfd7? (better is 20...Rf8!?+/–) 21.Nf7!+- Kf7 22.fe6 Kg8 23.ed7 Kh8 24.Qh3 Nd7 25.e5 Qh6? 26.Qh6+- gh6 27.d5 Bg5 28.dc6 Be3 29.Kh2 Nf6 30.Nc4 Ng4 31.Kh3 Bc1 32.Kg4?? Bb2=+ 33.Nb2 bc6 34.Rf6 Rg8?? 35.Bg8+/– Rg8 36.Kf4 Rg2 37.Nc4 Rg6 38.Na5+- Rf6 39.ef6 Kg8 40.Nc6 Kf7 41.a4 Kf6+= 42.b5 ab5 43.ab5 Bd3 44.b6+/– Ba6 45.Nb8 Bb7+= 46.Nd7 Kg6 47.Ne5 Kf6 ½–½. Jalo,Pentti – Jokelainen,Heikki, Helsinki op3, 1994.

4.a3 Nd7 5.e3 e5 6.c4 c6 7.cd5 cd5 8.Bb5 f6 9.d4 e4 10.Nfd2 a6 11.Be2 h5 12.Nc3 g6 13.Nb3 b6 14.Rc1 Nh6? (14...Qe6 15.Nd2 Kd8 16.Qa4+/–) 15.h3?? (15.Ba6 Bg4 16.Qc2 Qc6+-) 15...Nf7? (better is 15...Kd8+=) 16.Ba6!+- Ra6 17.Nb5 Qb8 18.Nc7 Kd8 19.Na6 Qb7 20.Qe2 Bd6 21.b5 Nb8 22.Rc2 Bc8 23.Nb8 Qb8 24.Kd2 Qa7 25.Rb1 Bd7 26.Bc3 Ke7 27.Ke1 Qa4 28.Bb4! Rc8 29.Rc8 Bc8 30.Nc1 Bd7 31.Qd1 Bb4 32.Rb4 Qa3 33.Ra4 Qc3+= 34.Qd2 Qc7? 35.Qb2 Nd6 36.Rb4 Nc4 37.Qe2 Na3 38.Kd1 Ke6 39.f3 f5 40.fe4 fe4 41.g4 hg4 42.Qg4 Kf6 43.Qh4+/– Kf7 44.Qh7 Ke8? 45.Ne2 Qc2 46.Ke1 Qc8?? 47.Rb2 Nc4 48.Ra2 Na5 49.Nf4 Bb5 50.Nd5 Qc1 51.Kf2 Qd1 52.Kg3 Qg1 53.Rg2 Qe1 54.Kh2 1–0. Kolosovskiy,A (2030) – Solomatin,S (1875), Pavlodar KAZ, Open, 2013.

4.a3 Qf4-/+ 5.Nf3 Nd7 (5...Qg4 6.Nc3 c6 7.e3-/+) 6.e3 Qd6 7.c4 (7.Nc3 c6=+) 7...Bb1 (7...e5 8.cd5 Ne7 9.Bb5=+) 8.Rb1=+ dc4 (8...e5 9.Qc2 Ne7 10.cd5 Nd5 11.Qe4=) 9.Bc4= e6 10.e4 (10.0-0 a5=) 10...Nb6 11.Bb5 c6 12.Be2 Qd8 13.0-0 f6 14.Qb3+= Qd7 15.a4 Nh6 16.a5+= Nc8 17.Nd4 e5= 18.Ne6 Bd6 19.Bh5 g6 20.Rf6 Ng8= 21.Rg6 hg6 22.Bg6 Ke7 23.Nf8 Kf8=+ 24.Rf1 Ke7 25.Rf7 Kd8 26.Rd7 Kd7 27.Bf5 Kc7 28.Qe6 Nge7 29.Qd7 Kb8= 30.a6 ba6 31.Qe6 Rd8 32.h4 Kb7 33.h5 Bc7 34.Bg4 Rd6 35.Qf7 Rd2-/+ 36.h6? Nd6 37.Qe7 Rb2 38.h7 Ne4 39.Qg7 Rb1 40.Kh2 Nf2 41.Bf5 e4 42.g3 Rb3 43.h8Q Rh8 44.Qh8 Rg3 45.Bc8 Kb8 (46.Bg4 Kb7 47.Bc8 Ka8 48.Bg4 Bb8 49.Qb8 Kb8 50.Kg3 Ng4 51.Kg4 c5 52.bc5 a5-+; 45...Ka8 46.Bg4 Bb8 47.Qb8 Kb8 48.Kg3 Ng4-+) 0–1. Gilden,Lawrence C – Kuettner,Uwe, Wch U20 fin–B, 1961.

4.Nc3 c6 5.e3=+ Qb4 6.Rb1 Qa5 7.Ba1 (7.g4 Bd7=+) 7...b5-/+ 8.Rb2 (8.a4 b4 9.Na2 e5 10.Be5 Qa4 11.Nb4 Bb4 12.Bg7 A) 12...Qc2? 13.Qc2 (13.Rb4 Qd1 14.Kd1 a5 15.Rb8 Rb8 16.Bh8 Rb1 17.Ke2 a4+-) 13...Bc2 14.Rb4+-; B) 12...Bc2?! 13.Rb4 Bd1 14.Ra4 Ba4 15.Bh8=; C) 12...Be7 13.Bh8 Bc2+=) 8...e6 9.Nb1 (9.a4 Ba3 10.Rb3 Bc5=+) 9...b4 (9...Nf6 10.Nf3-/+) 10.c3 (10.Nf3 Nf6-/+) 10...Nf6 11.cb4 (11.Nf3 Ne4-/+) 11...Bb4 12.a3 (12.Rb3 c5 13.Bf6 gf6+/–) 12...Bc5 13.Qb3 (13.Rb3 Nbd7-/+) 13...Nbd7 14.Qc3 (14.Nf3 0-0-+) 14...Qc3 15.Nc3 Ba3 16.Rb3 Bd6 17.Be2 (17.d4 Rb8 18.Rb8 Nb8-+) 17...Nc5 18.Rb2 0-0 (18...Nd3 19.Bd3 Bd3 20.Rb7-+) 19.Nf3 Nd3 20.Bd3 Bd3 21.Kf2 (21.Ne5 Be5 22.fe5 Nd7-+) 21...Rfb8 22.Ne1 (22.Rc1 Rb2 23.Bb2 Rb8-+) 22...Ne4 (22...Rb2 23.Bb2 Ne4 24.Ne4 Be4 25.d3-+) 23.Ne4 Be4 24.Nf3 Rb2 25.Bb2 Rb8 (25...a5 26.Be5 Be5 27.Ne5-+). Grehl,Siegfried – Andersson,Lars H, corr 3GMM–03, 1995.

4.Nc3 Nf6 5.e3 -/+.

4.Be5 Qb4 5.Nc3 Qc5 -/+.

4.Nf3 e6 5.a3=+.

4.Nf3 h6 5.Nd4 Bg4 6.h3 Bh5 7.Nf3=+.

4.Nf3 h6 5.Nd4 Bh7 6.Nc3 c6 7.e3 e5 8.fe5 Ne5 9.b5 Bd6 10.Be2 Nf6 11.0-0 c5 (11...Qc7!?=+) 12.Nf5+= Qd7?? (better 12...0-0+=) 13.Ng7+- Ke7 (13...Kf8 14.Rf6 Kg7 15.Nd5 Be4+-) 14.Rf6! Kf6 15.Nh5 Ke7 (15...Kg6 16.Nd5 f5 17.Nhf6+-) 16.Nd5 (better 16.d4 Kf8 17.Nd5 cd4 18.ed4 Ng6+-) 16...Kd8 (16...Kf8 17.d4 cd4 18.ed4+-) 17.d4 cd4 18.Qd4 Qf5 (18...Kc8 19.Rd1 Rd8+-) 19.Ndf6 Ke7 (19...Qe6 20.Rd1 Kc8 21.Qd6 Qd6 22.Rd6+-) 20.Rf1 Qg5 (20...Qe6 21.Ng7 Qc8 22.Nh7+-) 21.h4 Qg6 22.Ba3!! Ba3 (22...Ba3 23.Qc3 Double attack (23.Qe5 Deflection; 23.Qc3 Decoy)) 23.Qe5 (23.Qe5 Kd8 24.Rd1 Qd3 25.Bd3 Kc8 26.Qc3 Kd8 27.Bh7 Bd6 28.Rd6 Ke7 29.Qe5 Kf8 30.Nd7) 1–0. Pierre – GuestRuviu, internet, 2020.

4.Nf3 h6 5.Nd4 Bh7 6.Nc3 e5 7.Nf3 e4 8.Nd4=+.

4.Nf3 h6 5.Nd4 Bh7 6.Nc3 e6 7.a3= Ngf6 (7...a5 8.b5=) 8.e3 Be7 (8...c5 9.bc5 Bc5 10.Na4=) 9.Be2 0-0 10.0-0 c5 11.bc5 Nc5 12.Qe1 (12.Rb1 Rc8=) 12...Nce4 (12...Rc8 13.Rb1=) 13.Ne4 Ne4 14.d3 Nd6 15.Rb1 b5 (15...Bf6 16.a4=) 16.Nc6 (16.Qg3 Bf6+=) 16...Qc7 17.Ne7 Qe7 18.Be5 a6 19.Qb4 Nf5 20.Qe7 Ne7 21.g4 Rfc8 (21...Rac8 22.Rfc1=) 22.Rb2 Nc6 (22...f6 23.Bd4=) 23.Bc3 (23.Bd6 Nd8+=) 23...f6 (23...Rc7 24.h4=) 24.h4 Ne7 (24...Ra7 25.Bd2=) 25.Bb4+= Nc6 (25...Kf7 26.h5+=) 26.Bd2 (26.Bd6 Rd8 27.Bc5 Rac8+=) 26...e5 (26...Rab8 27.Kf2+=) 27.Kg2 (27.f5 Kf8+=) 27...Kh8 (27...Rab8 28.fe5 fe5 29.g5 hg5 30.hg5=) 28.f5+= Bg8 29.g5 (29.Kg3 Bf7+=) 29...hg5 (29...Ra7 30.Bf3=) 30.hg5+- Bf7 (30...fg5 31.Rh1 Bh7 32.c4 dc4 33.dc4+=) 31.g6 Be8 32.Rh1 Kg8 33.Bf3 Ne7 (33...Rd8 34.Rh7+-) 34.Bb4 Rc7 (34...e4 35.Be7 ef3 36.Kf3+-) 35.Be7 Re7?? (better 35...e4 36.Bd6 ef3 37.Kf3 Rc6+-) 36.Bd5 Kf8 (36...Re6 37.fe6 Rd8+-) 37.Rh8 1–0. Janek – dibeve, internet, 2016.

4.Nf3 h6 5.Nd4 Bh7 6.Nc3 Ngf6 7.e3=+.

4.Nf3 h6 5.Nd4 Bh7 6.f5 Ngf6=.

4.Nf3 h6 5.e3 e6=.

4.Nf3 Nc6 5.b5 Nb4 6.d3 Rc8 7.Nd4 Bg4 8.h3 Bd7 9.g3 c5 10.Nb3 Bb5 11.a4 Bd7 12.Bc3 Bf5 13.Bf6 ef6 14.c3 Nc6 15.d4 Be4 16.Rh2 cd4 17.cd4 Bd6 18.Nc5? (18.N1d2 Bb4 19.Kf2 Bc3-+) 18...Bc5 (Better is 18...Nd4!? 19.Qd4 Bc5 20.Qb2 Qa5 21.Nd2-+) 19.dc5 0-0 20.Bg2 Bg2 21.Rg2 d4 22.Nd2 Re8 23.Kf2 Qd5 24.e4?? (24.Rc1-+) 24...de3 25.Ke2 (25.Kg1 Rcd8 26.Qf1 ed2 27.Rd1 Qc5 28.Rf2-+) 25...Qg2 26.Ke1 ed2# 0–1. dosa – babylyub, ICS rated blitz match, 1998.

4.Nf3 e6 5.b5 Bd6 6.e3 0-0 7.Be2 c6 8.Nc3 a6 9.ba6 Na6 10.0-0 Nb4 (10...Bg4 11.Ne5 Be2 12.Ne2=+) 11.Nd4= Bg6 12.a3 Na6 13.a4 Nc5 14.Ba3 Nce4 (worse 14...Na4 15.Bd6 Nc3 16.Ra8 Ne2 17.Qe2 Qa8 18.Bf8 Qf8 19.d3+=) 15.Ne4 Ne4 16.Bd6 Qd6 17.Bf3 f5 (17...Nc5 18.Qb1=+) 18.Be4 fe4 19.Qg4 (19.a5 Ra6=) 19...Bf5=+ 20.Qg5 Rf6 21.Rfb1 Rg6 (better 21...Qc7!?=) 22.Nf5+- ef5 23.Qf5 Rf8 24.Qh5 Qd7 25.a5 Rf5? (better 25...Rh6 26.Qg5 Rg6+-) 26.Rb7!+- Qb7 (26...Rh5 27.Rd7 Rf5 28.Rd8 Rf8 29.Rf8 Kf8 30.a6+-) 27.Qf5 Rf6 28.a6 Qb2 (28...Qa8 29.Qd7 Rf7 30.Qe6+-) 29.Qe5 Qe5 30.fe5 Rf8 31.a7 Ra8 32.Ra6 Kf7 33.Kf2 Ke6 34.Rc6 Ke5 35.Rc7 Kf6 36.d3 ed3 37.cd3 h5 38.e4 de4 39.de4 g5 40.Kf3 Ke5 41.Rc5 Kd4 42.Ra5 Kd3 43.e5 1–0. Maestro – Smiuk, internet, 2020.

4.f4 Ngf6-/+ 5.Bg2 e6 6.a3 Rc8 7.Nf3=+ b6 8.Nd4+= c5 9.Nf5 ef5 10.bc5 bc5 11.e3 Qb6 12.Ra2 d4 13.0-0 Qe6 14.Ra1 Qb6 15.Ra2 Qe6 16.Ra1 Qb6 ½–½. Matkowski,Wiktor – Pytlakowski,Andrzej, Poland–ch Sopot, 1946.

4.Bg2 c6 5.d3 e5 6.c4? d4 (better 6...Bb4!? 7.Bc3 Bc3 8.Nc3 dc4 9.dc4 Qa5-+) 7.c5 b6 8.Bc6 Rc8 9.Bd7 Qd7 (worse 9...Kd7 10.Qa4 Ke6 11.Qa6+=) 10.cb6 (10.Nf3 f6=+) 10...Bb4-/+ 11.Nd2 ab6 12.Ngf3 f6 13.a3 Be7 14.0-0 Nh6 15.Nc4 Qb7 (15...Bc5 16.a4-/+) 16.a4 0-0 (16...Be6 17.Qb3 Rc6 18.Rfc1=) 17.Rb1 (17.Qb3 Nf7=) 17...Bh3 (17...Nf7 18.Qb3=+) 18.Re1 e4 (better 18...Nf7=+) 19.de4?? (better 19.Qb3 Nf7 20.de4+- (20.Nd4?! Bc5=)) 19...Rc4-+ 20.Qb3 (20.Qd3 Qc6-+) 20...Be6 21.Rbc1 Rfc8 22.Rc4 Bc4 23.Qd1 Qe4 24.Bd4 Rd8 25.e3 (25.Qa1 b5 26.ab5 Bb5 27.Bb6-+) 25...Bd5 26.Kg2 (26.Bb6 Rb8 (26...Qf3?! 27.Qf3 Bf3 28.Bd8 Bd8 29.Ra1-+) 27.Bd4 Bb4-+) 26...Ba8 (better 26...Nf7!? 27.Kf1-+) 27.Qe2 Kh8 28.Bb6 (28.h3 Nf5 29.Kf1 Rb8-+ (worse 29...Nd4 30.ed4 Rd4 31.Qa6-+)) 28...Rd2! 29.Qd2 (29.Qd2 Qd5 Double attack (29...Qd5 Decoy)) 29...Qf3 30.Kf1 Qg2 (better 30...Ng4 31.e4 Qh1 32.Ke2 Qe4 33.Kd1 Qa4 34.Kc1 Nh2 35.Re7 Qa3 36.Qb2 Qe7-+) 31.Ke2 Qf3 (31...Qh2?! 32.Qd7 Ng8 33.Qf5-/+) 32.Kd3?? (32.Kf1 Ng4 33.e4 Qh1 34.Ke2 Qe4 35.Kd1 Qa4 36.Kc1 Nh2 37.Re7 Qa3 38.Qb2 Qe7 39.Qc3-+) 32...Qd5 (better 32...Qe4 33.Ke2 Qc4 34.Qd3 Bf3 35.Kf3 Qd3-+) 33.Bd4 Nf5 (33...Qe4 34.Kc3-+) 34.Rc1 (34.Qb2 Bb7-/+ (34...Nd4?! 35.Qd4 Qf5 36.e4 Qf3 37.Qe3=+)) 34...Qe4 35.Ke2 Qf3 (35...Bb7 36.Kd1-+) 36.Kd3? (36.Ke1 Bb7 37.Qa5-/+) 36...Qe4 (36...Be4 37.Kc3 h6 38.Bb6-+) 37.Kc3?? (37.Ke2 Bb7 38.Kd1-+) 37...Qc6 (37...Ba3 38.Ra1 Qc6 39.Kb3-+) 38.Kb2-/+ Qb7 39.Ka2 Qd5 (39...Qa6 40.Kb2 Bc6 41.Bc5=+) 40.Ka1 Bc6 (better 40...Bb7-/+) 41.Rc6? (better 41.Qa2 Qd6 42.Bc5-/+) 41...Qc6-+ 42.Qc3 (42.g4 Nd6-+) 42...Qa4 43.Kb1 Qd1 (43...Nd6 44.Kc1 Qa6 45.e4-+) 44.Kb2 (44.Kb2 Nh6 45.e4-+). JUANKARODA (1730) – ng241278 (1765), lichess.org, 2020.

4.Nf3 e6 (--> 3.Nf3 e6 4.g3 Nf6).

4.Bg2 e6 5.a3 Be7 (5...c5 6.b5-/+) 6.d3 (6.Nf3 0-0=+) 6...a5 (6...c5 7.bc5 Bc5 8.Nh3-/+) 7.b5 c6 8.bc6 bc6 9.Nf3 h6 10.Nbd2 0-0 11.0-0 Bh7 12.c4+= Ra6 13.Re1 Nbd7 14.e4 Nc5=+ 15.Ne5 Nfd7 16.Nd7 Qd7 17.Qc2 de4 18.de4 Qd3 19.Qc3 Bf6 20.e5 Be7 21.Red1 Na4 22.Qd3 Bd3 23.Bd4 Rd8 24.Be3 Nc3 25.Re1 Ne2 26.Kh1 Nd4 27.Bd4 Rd4 28.Rec1 Rb6-/+ 29.Ra2 Bc5=+ 30.f4 Kf8 31.Bf3 g5 32.fg5 hg5 33.Bg2 g4 34.h4 gh3 35.Bh3 Be4 36.Bg2 Bg2 37.Kg2 Rd3 38.a4 Be3 39.Rcc2 Bd2 40.Rd2=+ Re3 41.Rd8 Ke7 42.Rad2 Re5 43.R8d7 Kf6 44.Rf2 Kg6 45.Rdf7 Rb4-/+ 46.R2f6 Kg5 47.Rf4 Rf5 48.Rg7 Kf6 49.Rf5 ef5 50.Ra7 Ra4 51.Ra6 Rc4 52.Ra5 Ke6 (53.Kf3 c5-/+; 52...c5 53.Kf3-/+) 0–1. Bendig,Frank – Velker, corr ICCF TT–4–90 SF, 1995.

4.a3 =+.

4.b5 c6 5.e3 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Qa5 9.Bc3 Bb4?? (better 9...Qa4 10.bc6 Nc6=+ (worse 10...Qc6 11.Nf3+=)) 10.Bg7+- Qa4 11.Bh8 Bc2 12.Qc1 cb5 (12...Qb3 13.Nc3+-) 13.Nc3 (13.Bb5!? Qb5 14.Qc2 Qc6 15.Qh7 Qc1 16.Ke2 Ne7+-) 13...Bc3 14.Bc3 Nc6 (14...b4 15.Bb4! Nf6 16.Ba3+-) 15.Qb2 (better 15.Bb5!? Qb5 16.Qc2 h6+-) 15...b4 16.Bg7 b3 17.Ne2 Nb4 (17...Qa2 18.Nc1 Qb2 19.Bb2+-) 18.Nc3 Bd3 (18...Qa5+-) 19.Na4 (19.Na4 Bc4 20.Qe5+-) 1-0. Fuirio (1705) - Gerasim5088 (1765), Rated Classical game, lichess.org, 2013.

4.e3 Nf6 5.a3 Bd6 6.c4 0-0 7.cd5 e5 8.Nc3 Ne4 9.Nb5 a6 10.Nd6 cd6 11.d3 Nf6 12.e4 Bg6 13.Be2 Nbd7 14.Nf3 Nh5 15.Nd2 (better is 15.Ne5!? Ne5 16.Be5 (16.Bh5 Bh5 17.Qd2 Rc8-/+) 16...de5 17.Bh5+-) 15...Nf4+= 16.Nc4 (16.Bf1 Bh5 17.Qb3 f5+/–) 16...Nf6 (better is 16...Ng2!? 17.Kf1 Nf4 18.Nd6 Qb8=) 17.0-0+/– Ne2 18.Qe2 b5 19.Na5 Nh5 20.Nc6 Qd7 21.Qg4 Qg4 22.hg4 Nf6 23.f3 Rfe8 24.Kh2 Nd7 25.Bc1 Nb6 26.d4 ed4 27.Nd4 h5 28.g5 (28.gh5!? Bh5 29.Bf4 Nc4+-) 28...Nc4 29.Bf4 Ne5 30.Be5 Re5 31.Nc6 Rg5 32.Rae1 f6 33.f4 Rg4 34.Ne7 Kf7 35.Ng6 Kg6 36.f5 Kg5 37.g3? (37.Rf3 Rc8 38.Rfe3 Kf4=+) 37...Rc8 (37...Re8 38.Rc1 Ree4-/+) 38.Re2? (better is 38.Re3=) 38...Rc3-+ 39.e5? (39.Ra1 Rcg3 40.Raa2-+) 39...fe5 (39...de5?! 40.Rd1 Rgg3 41.d6 Rh3 42.Kg1-+) 40.Ref2 Rgg3 (40...Ra3?! 41.f6 gf6 42.Rf5 Kh6 43.Rf6 Rg6 44.R6f3-+) 41.f6 (41.Ra1 Rh3 42.Kg1 Ra3-+) 41...Rh3 42.Kg1 gf6 43.Rg2 Rhg3 44.Rg3 Rg3 45.Kf2 Ra3 (46.Rc1 Rd3-+) 0–1. badboy1221 – LealM, Live Game Caissa's Web, 2004.

4.g4 Be4 5.f3 Bg6 6.h4 h6 7.b5 (better 7.e3!?=+) 7...Be7-/+ 8.Qc1 (8.Nh3 Bh4 9.Nf2 Rh7-/+) 8...Nf6 (8...Bh4!? 9.Kd1 Bf6 10.e3-+) 9.d3 Rg8 (9...c6 10.a4-/+) 10.h5 Bh7 11.Nh3 (11.e4 c6 12.a4 Qb6=+) 11...Qd6 12.Rg1 White intends g5 (12.e3 Nbd7-/+) 12...Qb4 13.Nd2 Qb5 14.Bf6 (14.e4 Qa4-/+) 14...Bf6-+ 15.Rb1 Qc6 16.g5 (16.c4 Bd4 17.Nf2 Na6-/+) 16...hg5 17.Ng5 Bd4?? (better 17...Rh8-+) 18.Rg4+= f6? (better 18...Bc3 19.Nh7 Rh8+=) 19.Nh7+- (19.Rd4?! fg5 20.c4 Qc5+=) 19...Be3?? (better 19...Rh8+-) 20.Nf6! Kf7 (20...gf6 21.Qb2 Double attack (21.Rg8 Pinning; 21.Rg8 Deflection; 21.Qb2 Decoy)) 21.Ng8 Kg8 (21...Nd7 22.Ne7! Ke7 23.Rg7 Kf8 24.Qb2+-) 22.h6! Kh7 (22...Bh6 23.Qb2 Combination) 23.hg7 (23.hg7 Nd7 24.Qa3+-) 1–0. afsharian (1655) – wizrus (1635), lichess.org, 2017.

4.Nf3 Nbd7 5.d3 c6 6.g4 Bg6 7.Rg1 Qc7 8.h4 h5 9.g5 Ng8 (9...Ng4!?=+) 10.Bh3= 0-0-0 11.Ne5 e6 12.Ng6 fg6 13.a4?? (better 13.a3!?=) 13...Bb4 (better 13...Qh2 14.Rg3 Bb4 15.Bc3 Rf8 16.Bb4 Qf2 17.Kd2 Qf4 18.e3 Qb4 19.Ke2 Qh4-+) 14.Kf1-/+ Bf8 (14...Qf4 15.Be6 Qh4 16.Nd2=+) 15.Be6=+ Re8 16.Bd7 Qd7 17.Nd2 (17.Rh1 Bc5=+) 17...Ne7 (17...Qh3 18.Ke1-/+) 18.c4? (18.Rh1 Nf5=) 18...Nf5 (better 18...Qh3!? 19.Ke1 dc4 20.dc4 Nf5-+) 19.Nf3 Bd6 (better 19...dc4!? 20.dc4 Qe6=+) 20.cd5+= cd5 21.Rc1 Kb8 22.Qb3 Qe6 23.e3?? (better 23.Rc2+=) 23...Rhf8 24.e4 Ng3!! 25.Rg3 (25.fg3 Qh3 Double attack (25...Rf3 Discovered attack; 25...Qh3 Decoy); 25.Rg3 Bf4 Double attack (25...Bf4 Decoy)) 25...Bg3 26.Kg2 (26.Rb1 Qh3 27.Ke2-+) 26...Qg4 27.fg3 Qf3 28.Kh3 Qg4 29.Kg2 Rf3 (29...Qe2 30.Kg1 Qe3 31.Kg2 Rf2 32.Kh3 Qf3 33.Qb7 Kb7 34.Rc7 Kc7 35.Be5 Re5 36.ed5 Qg4) 30.d4 (30.Be5 Re5 31.Rc8 Qc8 32.Kf3 de4 33.de4 Qg4 34.Kg2 Qe2 35.Kh3 Qe4 36.Qd1-+) 30…Qg3 (30...Qg3 31.Kh1 Re4 32.Qb7 Kb7 33.Rc7 Kc7 34.Ba3 Rh4) 0–1. beatmeeasy (1955) – teguhberiman (2005), lichess.org, 2021.

4.Nf3 e6 5.a3 a5=+.

4.Nf3 e6 5.e3 Bb4-/+ 6.a3 Ba5 7.c4 (7.Be2 Be4-/+) 7...c6 8.cd5 cd5 (8...ed5 9.Be2-/+) 9.Be2 0-0 10.0-0 Nc6 11.d3 Rc8 12.Nbd2 Bc7 13.g4 (13.Nh4 Bg6-/+) 13...Bg6 14.Qc2 (14.Qb3 Na5 15.Qa4 Nd7-+) 14...Nd7 15.Qc3 (15.Rfc1 Bd6-+) 15...f6 (15...Nce5 16.Ne5 Be5 17.Qb4-+) 16.g5 (16.Rfc1 Bd6-+) 16...Nde5 17.gf6 gf6 (17...Qf6!? 18.Qb3 Bf5 19.Kh1 Bh3 20.Qb7 Bf1 21.Rf1-+) 18.Ne5 Ne5 (better 18...fe5 19.Bg4 Bf5 20.Bf5 Rf5-+ (20...ef5?! 21.Qb3-/+)) 19.f4? (19.Qb3 Ba5 20.Rfd1 Bf5-/+) 19...Nc6 (better 19...Bb6 20.Qb3 Be3 21.Kg2 Nd7-+) 20.Bg4 Qd6 21.Nf3? (better 21.Qb3-/+) 21...Ba5-+ 22.Qb3 Bb6 (22...f5 23.Qb7 Rc7 24.Qa6-+) 23.d4? (better 23.Nd4 Nd4 24.Bd4 Bd4 25.ed4-+) 23...f5 24.Nh4 (24.a4 Qd8-+) 24...fg4 25.hg4 (25.Ng6 hg6 26.Qd3 Kg7 27.hg4 g5-+) 25...Na5 26.Qd1 (26.Qb4 Qd7 27.Ng6 hg6-+) 26...Nc4 (26...Be4 27.Nf3-+) 27.Rf2 (27.Ng6 hg6 28.Qd3 Kg7-+) 27...Ne3 28.Qd2 0-1. oneiver (1760) - DacostaH (1920), Rated Classical game, lichess.org, 2013.

4.g4 Be4 5.Nf3 e6 6.Bg2 c5 (6...Bb4 7.a3 Bd6 8.d3 Bf3 9.Bf3-/+) 7.a3 (7.b5!?=+) 7...cb4-/+ 8.ab4 Bb4 9.c4 (9.Nc3 0-0-/+) 9...Nc6 (9...dc4 10.Na3-+) 10.0-0 (10.cd5 Bd5 11.Nc3 0-0-/+) 10...Qc7 (better 10...dc4!? 11.Na3 Bd5-+) 11.d3 (11.g5 Nh5 12.d3 Bf3 13.Bf3 Qf4-/+) 11...Bg6 (better 11...Bf3 12.Bf3 h5 13.Bf6 hg4 14.Bg4 Qf4-+) 12.Ne5?? (better 12.Qa4 0-0 13.Bf6 gf6 14.cd5 ed5 15.Rc1=+) 12...Ne5-+ 13.Qa4 Nc6 14.g5 (14.Bf6 gf6 15.cd5 ed5 16.Bd5 Qd6-+) 14...Nd7 (14...Nh5 15.cd5 ed5 16.Rc1-+) 15.Bg7 Rg8 16.Bf6 (16.cd5 ed5 17.Bd5 Rg7 18.Bc6 Qc6 19.Qb4-+) 16...Nf6 17.gf6 Bc5 (17...Qf4 18.e3 Qf6 19.cd5 ed5 20.f4 Bd3 21.Rf2-+) 18.e3 (18.cd5 ed5 19.Nc3-+) 18...Bd3 19.cd5 ed5 20.Rd1 (20.Nd2 Qe5 21.Rac1-+) 20...Be4 21.Kf1 Bg2 22.Ke1 (22.Ke2 Qe5 23.Nd2 Bh3-+) 22...Bf3 23.Rc1 Rg1 (23...Be3 24.Nd2 Qh2 25.Qc6 bc6 26.Nf3 Qf2 27.Kd1 Rg1 28.Ng1 Qd2) 24.Kd2 Rc1 (better 24...Qh2 25.Kc2 Qf2 26.Nd2-+) 25.Kc1 Bb4 26.Nd2 Bd2 (better 26...Be2!? 27.Ra2-+) 27.Kd2 Qd7 (better 27...d4 28.Ra3-+) 28.Rg1 0-0-0 29.Rg3 (29.Qf4 Be4 30.f3 Bg6-+) 29...Ne5 (29...d4 30.e4 Be4 31.Qd1-+) 30.Qc2 (30.Qf4 Qd6 31.Rf3 d4 32.Qf5 Kb8-+) 30...Kb8 31.Qc5 (31.Qc3 d4 32.ed4-+) 31...Qa4 32.Qe7 Qd1 33.Kc3 Rc8 34.Kb4 (34.Qc7 Rc7 35.Kb2 Nc4 36.Kc3 Qd2 37.Kb3 Bd1) 34…Nc6 (34...Nc6 35.Kc5 Ne7 36.Kd6 Qc2 37.Ke5 Qc3 38.Kf4 Qf6; 34...Rc4 35.Ka3 Qa1 36.Kb3 Bd1) 0-1. Ze_cAt - Natsuko (1785), Rated Classical game, lichess.org, 2013.

4.g4 Bg6 5.Bg2 (5.Nf3 e6 6.g5 Nh5=+) 5...e6 6.b5 (6.a3 c5=+) 6...Bc5 (6...a6 7.Nc3-/+) 7.e3 (7.Nf3 a6=+) 7...Nbd7 (7...a6 8.h4 h6 9.Nc3=+) 8.a4 (8.g5 Nh5 9.h4 h6=+) 8...Qe7 (8...0-0 9.d3=+) 9.Bf6 (9.g5 Nh5 10.h4 h6=+) 9...Qf6 (9...Nf6 10.Nf3-/+) 10.Ra2 (10.d4 Bb4 11.c3 Ba5-/+) 10...0-0 (10...Bd6 11.Nf3-/+) 11.Qf3 (better is 11.h4 h6 12.Nf3-/+) 11...Ne5?? (better is 11...a6-/+) 12.Qf6+/– gf6 13.Nf3 (better is 13.f4 Nc4 14.f5 ef5 15.Bd5+=) 13...Nf3 (13...a6 14.Nc3=+) 14.Bf3 (14...a6 15.ba6 ba6 16.d4=). riverborne – EELDROP, Live Game Caissa's Web, 2005.

4.Na3 Nf6 5.b5 (5.Rb1 Na6=+) 5...Bd6 6.e3 0-0 7.Nf3 Nbd7 8.c4 Nc5 9.d4 Nce4 10.h3 (10.c5 Be7 11.Bd3 b6=+) 10...c5 (10...Bb4 11.Ke2-+) 11.Nd2 (11.dc5 Qa5 12.Nd2 Bc5 13.Bf6 Nf6 14.cd5 ed5-/+) 11...cd4 (better is 11...Nd2 12.Qd2 Ne4-+) 12.g4? (better is 12.Bd4 Bb4 13.Nab1-/+) 12...de3-+ 13.Ne4 (13.fe3 Bg3 14.Ke2 Nf2-+) 13...Be4 (13...de4?! 14.gf5 ef2 15.Kf2 ef5 16.Bg2=+) 14.f3 Bf3! (15.Be2 Bb4 16.Kf1 Bh1-+) 0–1. Andersson,Lars H – Gross,Wilhelm, corr SOK–92–80, 1992.

4.e3 Bb4 5.Bg7 e5 6.Bh8 +-.

5.Bg7 Ba3 6.Ra3 Nf6 7.Bh8 Nbd7 +-.

5.Bg7 Ba3 6.Bh8 +-.

5.b5 a6 6.Nf3 ab5 7.ab5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 a6 6.a4 ab5 7.ab5).

5.Bc3 Bd6 =+.

4.a4 c5 5.e3 ab5 (5...f6 6.ba6 ba6 7.Nc3=) 6.ab5 (6.Bb5 Bd7=) 6...Ra1 7.Ba1 Nf6 8.c4 (8.Nf3 Nbd7=) 8...e6+= 9.Nc3 Be7 10.Nf3 Nbd7 11.Nh4 Bg6 12.Ng6 fg6 13.Bd3 (13.d4 0-0 14.cd5 Nd5=) 13...Ne5 14.Qc2? (better is 14.Qe2!?=) 14...dc4-/+ (14...Nc4?! 15.Bc4 dc4 16.Qa4=) 15.Be4 Nd3 16.Bd3 Qd3 17.Qd3 cd3 18.0-0 0-0 19.f3 Nd7 20.Rc1 Ra8 21.Bb2 Bf6 22.Ra1 (22.Rb1 c4-+) 22...Ra1 23.Ba1 Nb6 24.Kf2 Kf7 25.Bb2 Nc4 26.Bc1 Ke7 27.Ke1? Kd7 28.g3? Kc7 29.f4 Bc3 30.dc3 Kb6 31.g4 Kb5 32.e4 Ka4 33.f5 gf5 34.ef5 ef5 35.gf5 Kb3 0–1. Anderson,George – Zaczek,Jonathan (1635), Winnipeg op, 2003.

4.a4 c6 5.Nf3 cb5 6.ab5 ab5?? (better is 6...Nd7=) 7.Ra8+- Bg4 (7...f6+-) 8.Be5 Nc6 (8...f6 9.Bb8 e5 10.e3+-) 9.Rd8 Nd8 10.Nc3 (10...f6 11.Bc7+-) 1–0. miehnekort – ansonlai1024, Yahoo, 2005.

4.a4 e6 5.e3 Bd6 6.Bg7 Ne7 7.Bh8 e5 8.Bf6 Nd7 9.Be7 Qe7 10.c4 d4 11.Qf3 Qf6 12.Qb7 Rb8 (12...Nb6 13.e4 Bc8 14.Qa8 Na8 15.a5+-) 13.Qf3 (better is 13.Qa6 e4 14.ed4 Qd4+-) 13...e4 14.Qd1 d3 (14...de3 15.Nc3 ef2 16.Kf2 Bg4 17.Nf3 ef3 18.gf3+-) 15.Nc3 Be5 16.Rc1 a5 17.g3 Qe6 (17...Qg6 18.Bh3+-) 18.f3 Nc5 (18...ef3 19.Nf3 Qc4 20.Bg2+-) 19.Bg2 Qg6 20.Bh3 (20.fe4 Ne4 21.Ne4 Be4+-) 20...Bg3 (20...Bh3 21.Nh3 Qh5 22.Nf2 Bc3 23.g4 Bd2 24.Qd2+-) 21.hg3 Qg3 22.Kf1 Bh3 23.Rh3 Qg6 24.fe4 Ne4 25.Ne4 Qe4 26.Qf3 Qg6 27.Rg3 Ke7 28.Rg6 fg6 29.Qe4 Kf7 30.Kg2 Kg7 31.Rf1 h5 32.Qe7 Kh6 33.Rf7 Rh8 34.Qf6 Rg8+- 35.Nh3 (35...Re8 36.Qg5#) 1–0. Pohl,M – Hermann,Horst, Oberschwaben–chB, 1994.

4.e3 Nf6 5.c4 e6 6.a4 Bb4 7.h3 (7.cd5 ed5 8.Qf3 Be4 9.Bf6 gf6=) 7...0-0 8.g4 (8.cd5 Nd5 9.Qe2 Nf6-/+) 8...Bg6-/+ 9.g5 Ne4 10.h4 dc4 11.Nc3 (11.Bc4!? ab5 12.ab5 Ra1 13.Ba1-/+) 11...ab5-+ 12.ab5 (12.h5 Bf5 13.ab5 Bc3 14.Bc3 Nc3 15.dc3 Bc2-+) 12...Ra1 (12...Bc3 13.Bc3 Nc3 14.dc3-+) 13.Ba1 f6 (better 13...Bc3!? 14.Bc3 Qd5-+ (14...Nc3?! 15.dc3 Bd3 16.Bg2-+)) 14.Bc4-/+ Qe7 (better 14...fg5!? 15.Ne4 Be4-/+) 15.Ne4= Be4 16.f3 (16.gf6 Qd6 17.Rh3 gf6 18.Rg3 Kf7+=) 16...Bd5 17.Qb3 (better 17.gf6!? gf6 18.Bd5 ed5 19.Qb3=) 17...Bc4-/+ 18.Qc4 fg5 (18...Qd6!? 19.Qd4 Qg3 20.Kf1 c5 21.bc6 Nc6=+) 19.hg5= Qd7?? (19...Qd6 20.Qc2 Qg3 21.Kf1=) 20.Bc3 (better 20.Qb4 Qd3 21.e4+-) 20...Bc3= 21.dc3 (worse 21.Qc3 Qb5 22.Qc2 Qf5 23.Qc7 Qg5-/+) 21...c6 22.Qd4 (22.Qe4 g6=) 22...Qd4 23.ed4 cb5 24.Ne2 (24.Kf2!?=+) 24...Rf3-/+ 25.Rf1 (25.Rh4!?-/+) 25...Rf1-+ 26.Kf1 Kf7 27.Kf2 (27.Nf4 Nc6-+) 27...Kg6 (better 27...Nc6!? 28.Ke3-+) 28.Nf4 Kg5 (28...Kf5 29.Nh5 Kg5 30.Ng7-+) 29.Ne6-/+ Kf6 30.d5 (30.Nc5 b6 31.Nd3 g5-+) 30...b4! 31.cb4 Nd7 (31...Na6 32.b5-+) 32.Ke3 (32.Kf3 Ke5 33.Ng7 Kd5-+) 32...h5 33.Kf4 h4 (33...Nb6 34.Ke4 h4 35.Nd4-+) 34.Kg4 (34.Ng5 Ke7-/+) 34...Nb6 35.Kh4 (35.Nd8!? Nd5 36.Nb7-/+) 35...Nd5-+ 36.Nd8 Nb4 (better 36...b6!? 37.Nc6 Kf5-+) 37.Nb7-/+ Nd5 (37...Nd3!?-/+) 38.Nd6= g6 39.Ne4 Kf5 40.Ng5 (40.Ng3 Ke6=) 40...Nf4 (better 40...Ne3 41.Nf7 Nc4-/+) 41.Nh3?? (better 41.Nf3!?=) 41...Ng2 (41...Nh3 42.Kh3 Kf4-+) 42.Kg3=+ Ne3 43.Kf3 (43.Ng1 Kf6=+) 43...Nf1 (43...Nd5 44.Kg3-/+) 44.Kg2 (44.Nf4!?=+) 44...Nd2-/+ 45.Nf2 g5 (better 45...Nc4!?-/+) 46.Kh2 (46.Nh3 g4=) 46...g4 (46...Nb3 47.Nh3=) 47.Nh1 (47.Ng4 Kf4=) 47...Kf4=+ 48.Kg2 (48.Nf2!?=+) 48...Nf3-/+ 49.Ng3 Ne1 50.Kh2 (50.Kf2 Nd3 51.Kg2 Ne5=+) 50...Kf3-+ 51.Nh5 (51.Nf5 Nc2-+) 51...Ng2 (51...Nc2!? 52.Kg1 Nd4 53.Kf1-+) 52.Kh1 g3 (better 52...Ne3-/+) 53.Kg1 Ne1 54.Kh1?? (better 54.Ng3 Nd3 55.Nf5=) 54...g2-+ 55.Kg1 Nd3 56.Nf6?? (56.Ng3 Nf4 57.Kh2=+) 56...Nf4 57.Ne4 (57.Kh2 Ne2 58.Kh3 g1Q 59.Kh4 Nf4 60.Nd5 Qg3) 57...Ne2 58.Kh2 g1Q (58...Ke4?! 59.Kg2=) 59.Kh3 Qh1 0–1. afsharian – Haihochess (1630), lichess.org, 2018.

6.Ba1 c5 7.e3 Nf6 8.c4 e6 9.Nf3 Be7 10.Be2 0-0 11.0-0 dc4 12.Bc4 Bd3 13.Ne5? (better 13.Bd3!? Qd3 14.Nc3=+) 13...Bf1-+ 14.Qf1 Nbd7 15.Nf3 b6 16.Nc3 Qc7 17.Qb1 Ra8 18.Bb2 Ne5 19.Ng5?? (better 19.Ne5 Qe5 20.Nd5-/+) 19...Nc4-+ 20.Nd5 Nd2 (20...ed5 21.Bf6 g6 22.Be7 Nd2 23.Qb2 Qe7 24.h4-+) 21.Qc2?? (better 21.Nc7 Nb1 22.Na8-+) 21...Qd6 (better 21...ed5 22.Bf6 g6-+) 22.Nf6+= Bf6 23.Qh7 Kf8 24.Qh8?? (better 24.Bf6 Ke8 25.Bg7+=) 24...Ke7-+ 25.Bf6?? (better 25.Qa8 Bb2 26.Qg8-+) 25...Kf6 26.Qa8 Kg5 27.Qa1 (27.Qa1 Kh6 28.f3-+). AhmedSultanov (1725) – artrockzzzz (1740), lichess.org, 2019.

6.Ba1 c6 7.e3 Qa5 8.Nc3 e6 (8...Bc2 9.Qc1-/+) 9.Nf3 (better 9.Bb2=) 9...Bb4 (better 9...Bc2!? 10.Qc2 Qa1 11.Nd1 Bd6-/+) 10.bc6 (10.Nd5 Bc2 11.Qc1 Bf8 12.Nc7 Qc7+=) 10...bc6 (10...Nc6 11.Nd5 Bf8= (11...ed5?? 12.Bg7 Qa2 13.Bd3+-)) 11.Nd5+- Bf8 (11...Qd5 12.Bg7 Combination; 11...cd5 12.Bg7 Combination; 11...ed5 12.Bg7 Combination) 12.Nc3 (12.Be5 cd5 13.Bb8 Bc5+-) 12...Nf6 (12...Bc2 13.Qc2 Qa1 14.Nb1+=) 13.Be2 (13.Nd4 Bg6+-) 13...Be7 (13...Bc2!? 14.Qc2 Qa1 15.Nb1 Bb4+=) 14.0-0 0-0 15.h3 h5 (15...Rd8 16.Nh4+-) 16.Nh4 Bg6 (better 16...Bh7!?+-) 17.Ng6+- fg6 18.Bf3 (18.Bc4 Nd5+-) 18...Nd5 (18...Qf5 19.d4+-) 19.Nd5 (19.Be4 Bf6+-) 19...cd5 20.Bc3 (20.e4 Bf6+-) 20...Qc7 21.Be2 (21.e4 Qf4 22.Re1 Bd6+-) 21...Bd6 22.f4 Nd7 (22...Nc6 23.Qa1+-) 23.Bd3 e5 (23...Kf7 24.Qa1+-) 24.Bg6 ef4? (24...Nf6+-) 25.Qh5 Nf6 26.Bf6 Rf6 (26...gf6 27.Qd5 Kg7+-) 27.Qh7 Kf8 28.Qg7 (28.Qh8 Ke7 29.Qe8) 28...Qg7-+ 29.Bd3 Qg3 (29...f3 30.g4-+) 30.Rf3 (30.Be2 Be5 31.Bf3 fe3 32.de3 Qg5-+) 30...Qe1 31.Bf1 (31.Rf1 Qd2 32.Rf3-+) 31...Kg7 32.d3 (32.ef4 Rf4 33.h4 Rf3 34.gf3 Qg3 35.Bg2 Bc5 36.d4 Bd4 37.Kh1 Qh4 38.Bh3 Qh3) 32…fe3 (32...fe3 33.Rf6 Kf6 34.g3 e2 35.c4 ef1Q 36.Kh2 Qg3) 0–1. KLINGON09 (1780) – reshadaria (1740), lichess.org, 2019.

6.Ba1 c6 7.e3 h6 8.c4 (8.Nf3 e6=) 8...Nf6 9.Nc3 e6 10.h3 (10.Nf3 Bd6=) 10...Ne4 (better 10...dc4 11.Bc4 Bd3 12.Bd3 Qd3=) 11.Qb3? (11.Nf3 dc4 12.Bc4 Nd6=) 11...Qa5?? (better 11...Nd2 12.Qa4 Nf1-+ (12...Nc4?! 13.Bc4 dc4 14.e4-/+)) 12.Ne4?? (better 12.Qd1=+) 12...Qa1-+ (12...Be4?! 13.Bc3 Qd8 14.Nf3=; 12...de4?! 13.Bc3 Qc7 14.Qb2=) 13.Qd1 Qd1 14.Kd1 Be4 15.d3 Bf5 16.g4 Bg6 17.Nf3 Bd6 18.Nd2 0-0 (better 18...Ke7 19.d4 dc4 20.Bc4-+) 19.Nb3 (19.d4 Bb4-+) 19...cb5 (19...dc4!? 20.dc4 Be4 21.Rg1-+) 20.cb5 (20.cd5 ed5 21.f4 Re8-+) 20...b6 (20...Rc8 21.h4-+) 21.Be2 (21.f4 Rc8-+) 21...Nd7 (21...Rc8 22.f4-+) 22.Kd2 (22.f4 Nc5 23.Nc1 Na4-+) 22...Nc5 (22...Bb4 23.Kc2-+) 23.Nd4 (23.Nc5 Bc5 24.Ra1 f5-+) 23...Ra8 24.Rc1 (24.Nc2 Ra2 25.Rb1 f5-+) 24...Ra2 (24...e5!? 25.Rc5 Bc5 26.Nc6-+) 25.Rc2 Rc2 (better 25...Ra3!? 26.h4-+) 26.Kc2 Bh2 (26...e5 27.Nc6-+) 27.Nc6 (27.f4 Bg3-+) 27...Bg1 28.e4 (28.Ne7 Kf8 29.Ng6 fg6-+) 28...de4 (worse 28...Bf2 29.ed5 ed5 30.Ne7 Kf8 31.Nd5-+) 29.Ne5 (29.Ne7 Kh7 30.d4 Nb7-+) 29...ed3 30.Nd3 Nd3 31.Bd3 Bf2 32.Bg6 fg6 33.Kd3 Bc5 34.Ke4 Kf7 35.Ke5 g5 (35...Bb4 36.g5-+) 36.Ke4 Kf6 37.Kd3 (37.Kf3 Ke5 38.Kg3 Kd5-+) 37…Ke5 (37...Ke5-+) 0–1. AhmedSultanov – NicKyCooLz89isHere, lichess.org, 2019.

6.Ba1 e6 7.e3 Nd7 8.Nf3 Qa8 (8...Ngf6 9.Be2=) 9.Bd4 (9.Bb2 Ngf6=) 9...c5 10.bc6 bc6 11.Be2 Bc5?? (better 11...c5 12.Bb2 Qa4=) 12.Bg7+- 1–0. Anonymous – Anonymous, lichess.org, 2020.

6.Ba1 e6 7.e3 Nf6 8.h3 Be7 9.Nc3 (9.Nf3 0-0=) 9...0-0 10.Nce2 (10.Nf3 Ne4=) 10...Nbd7 11.Nf4 (11.Nf3 Be4=+) 11...Nb6 (11...e5 12.Bd3 Bd3 13.Nd3-/+) 12.Be5 (12.g4 Bg6=+) 12...h6 (12...Nfd7 13.Bc3 Bd6-/+) 13.Nh5? (13.Nf3 Bd6=+) 13...Bg6 (better 13...Nh5!? 14.Qh5 Nd7-+) 14.Nf6 Bf6 15.Bg3 (15.Nf3 Be5 16.Ne5 Qg5=+) 15...e5 16.Ne2 (16.Nf3 Qe7=+) 16...Be4 (16...Re8 17.d4-/+) 17.d3 Bg6 18.Nc1 Qd7 19.d4 (19.Qd2 Qb5 20.d4 Qe8-/+) 19...ed4-+ 20.ed4 Re8 21.Be2 Qb5 22.0-0 Qb4 23.Bc7 Nc4 24.Bc4 (24.Bd3 Nb2 25.Qg4 Nd3 26.Nd3 Qd4-+) 24...dc4 (24...Qc4 25.Be5 Bc2 26.Qe1-+) 25.d5 Re7 (better 25...Qa4!?-/+) 26.d6 (26.Bd8!? Rd7 27.Bf6 gf6 28.Qd4=) 26...Rd7=+ 27.Qe2 Qc3?? Looking at c2 (better 27...Qa4=+) 28.Qe8+- Kh7 29.Qd7 Qc2 (29...Qd2 30.Qe8+-) 30.Qg4 (better 30.Qe8 b5+-) 30...Bf5 31.Qe2 Qc3 (31...Qe2 32.Ne2 b5 33.Nf4+-) 32.Rd1 Bd7 33.Qe4 g6 34.Ne2 (better 34.Qb7 Qc2 35.Qf3+-) 34...Qc2 (34...Qb3 35.Rb1 Qd3+-) 35.Rc1 (better 35.Qc2 b5 36.Nd4+-) 35...Qe4-+ 36.Ng3 Qf4 37.Re1 Bd4 38.Re4 (38.Ne4 Bc6 39.d7 Qc7 40.Kf1 Qd7 41.f3-+) 38...Qf2 39.Kh2 Bc6 (39...Qg1) 40.Re2 (40.Ne2 Be4 41.Nf4 Qf4 42.Kh1 Qf1 43.Kh2 Qg2) 40...Qf4 (40...Qg1) 41.d7-+ Bd7 (better 41...Qc7 42.d8Q Qd8-+) 42.Bf4+- b5?? (better 42...Bc6+-) 43.Rd2+- c3 (43...g5 44.Bc7 Be6 45.Rd4 b4+-) 44.Rd4 c2 (44...Be6+-) 45.Rd7 1–0. TWW_LONDON (1815) – Jaro71 (1795), lichess.org, 2021.

4.a4 e5 5.d4 e4 6.f3 (6.e3 Ngf6=+) 6...ef3 (6...Bb4 7.Kf2-/+) 7.Nf3 Ngf6 8.Ne5 (8.Ba3 Ba3 9.Na3 Ne4-/+) 8...Ne4 (better 8...Ne5 9.de5 Ne4-+) 9.Nc3?? (9.Nf3 Ndf6-+) 9...Qh4 (better 9...Bb4 10.Nd7 Kd7-+ (worse 10...Qd7 11.Qd3-+; 10...Nc3?! 11.Qd2-+; worse 10...Bd7 11.Qd3-+)) 10.g3 Ng3! 11.Kd2?? (11.hg3 Qg3 Double attack (11...Qh1 Pinning; 11...Qh1 Deflection)) 11...Nh1 12.Nd5 (12.Nf3 Qh6 13.Ke1 Bb4-+) 12...0-0-0 (12...Ne5 13.Bg2 Qg5 14.Kc3 Qg2 15.Nc7 Kd7 16.Na8 Qh3 17.Kd2 Qh6 18.e3 Qh2 19.Kc3-+) 13.Bg2 (13.Nf7 Nf2 14.Qc1-+) 13...Ne5 (better 13...Qg5 14.Kc3 Qg2 15.Qh1 Qh1 16.Rh1 Ne5-+) 14.Ne3 (14.Qh1 Nc4 15.Kc3-+) 14...Rd4 15.Bd4 Qd4 16.Kc1 Qe3 (16...Qa1 17.Kd2 Bb4 18.c3 Qc3) 17.Kb2 Nc4 18.Ka2 (18.Kb1 Qb3 19.Kc1 Qb2) 18...Qa3 19.Kb1 Qb2 0-1. Lisyonok – WizardofIz, Rated Classical game, lichess.org, 2013.

4.e3 e6 5.Nf3 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7).

4.e3 Ngf6 5.c4 e6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.Nf3 Bd6 6.c4 c6 7.bc6!? bc6 8.cd5 cd5 9.Nc3=.

5.Nf3 Bd6 6.c4 c6 7.cd5 cd5=+ 8.Be2 Ngf6 9.0-0 0-0 10.d4 e4 11.Nfd2 Qe7 (11...Rc8 12.Nc3=+) 12.Nc3 Rac8 13.Qb3 Be6 (13...Nb6 14.h3=) 14.a4= Nb6 (14...Rc7 15.Rfc1=) 15.a5 (15.Rfc1 Kh8=) 15...Nc4 16.Nd5 (16.Nc4 dc4 17.Qc2 Bb4=) 16...Bd5 (16...Bh2 17.Kh2 Qd6 18.Kg1 Nd2 19.Nf6 gf6=+) 17.Bc4 (better 17.Nc4 Bh2 18.Kh2 Bc4 19.Bc4 Qc7 20.Kg1 Qc4 21.Qc4 Rc4 22.Ba3=) 17...Bc4?? (17...Bh2 18.Kh2 Ng4 19.Kh3 Rc4 20.Kg4 Rd4-+) 18.Nc4+- Bh2 (18...Rfd8!?+-) 19.Kh2+- Qc7?? (better 19...Ng4 20.Kh3 Qe6+-) 20.Ne5 Qd6 (20...Ng4 21.Kg3 Ne5 22.de5 Qd8+-) 21.Ba3 Ng4 (21...Qd5 22.Qd5 Nd5 23.Bf8 Kf8+-) 22.Kg1 (22.Kg1 Qe6 23.Qe6 fe6 24.Ng4+-) 1–0. Massudy (2465) – Dogan2300 (2150), lichess.org, 2020.

5.Nf3 Bd6 6.c4 (6.Be2 Ngf6=+) 6...Ngf6 7.d4 Bb1 (7...e4 8.c5 Be7 9.Ne5=+) 8.Rb1 Bb4 9.Nd2 Ne4 10.Bc1 Nc3 11.Qb3 Nb1 12.Qb4 Nd2 13.Bd2 ed4 14.cd5 de3 (14...Nf6 15.Qd4 Qd5 16.Qd5 Nd5 17.e4-/+) 15.Be3 (15.Qe4 Qe7 16.Qe7 Ke7 17.fe3 Rhe8-/+) 15...Nf6 16.Bc4 Nd5 17.Qb3 c6 18.0-0 0-0 19.Bc5 (19.Rd1!?-/+) 19...Re8-+ 20.a4 (20.Rd1 Qa5 21.Be3 Rad8-+) 20...Qf6 (20...Qg5 21.Rd1-+) 21.Ba3 (21.Bd5 cd5 22.Qd5-+) 21...Rad8 22.Bb2 Qg6 23.Bc1 (23.Rc1 Nb6-+) 23...Nc7 (23...Nb6 24.Be3 Nc4 25.Qc4-+) 24.Be3 (24.bc6 bc6 25.Qb7 Nd5-+) 24...cb5 25.ab5 a6 26.ba6 ba6 27.Qa2 Nb5 28.h3 (28.Qa5 Rb8-+) 28...Re7 29.Qa5 Nc7 30.Bg5 Rde8?? (better is 30...Qh5!?-+) 31.Be7-/+ Re7 32.Qb4 (32.Ra1 Qf6=+) ½–½. Deutekom,A – Valkenier,Han, Haarlem op, 1995.

5.Nf3 Bg4 6.Be2 e4 7.Nd4 Be2 8.Qe2 Ngf6 9.c4? (better 9.d3=) 9...Nc5-/+ 10.cd5? (better 10.0-0 Nd3 11.Ba3 Ba3 12.Na3-/+) 10...Nd3-+ 11.Kf1 Nb2 12.Nc3 Nd5 (12...Bb4 13.Kg1-+) 13.Ne4 Be7 (13...Nb4 14.Qf3-+) 14.d3 Na4 15.Qc2 Nab6 16.Nf5 (16.a4 a6-+) 16...Bf6 (16...0-0 17.Qb2 Bf6 18.Nf6 Nf6 19.Qd4-+) 17.Rc1 Rc8 (17...a6 18.Nf6 Qf6 19.e4 ab5 20.d4-+) 18.g4 (18.Nc5 0-0-+) 18...0-0 19.Rg1 Be5 (19...c6 20.Qb3-+) 20.d4 Bh2?? (20...Bd6 21.Qd3-+) 21.Rg2?? (better 21.Rh1=+) 21...Bd6-+ 22.Rg1 (22.Qb3 Re8 23.Nc5 Rb8-+) 22...g6 23.Nh6 Kg7 24.Rh1 Nf6 (24...Be7 25.Nc5-+) 25.Ng5 (25.Nc5 Bc5 26.dc5-+) 25...Nfd5 (25...Ng4!? 26.Nhf7 Ne3 27.Kg1 Qg5 28.Ng5 Nc2 29.Ne6 Kg8 30.Rc2-+) 26.Nf5?? (26.Ne4 Qe7-+) 26...Kf6 (better 26...gf5 27.Qf5 h5-+) 27.Nh7= Ke6 28.Ng5?? (better 28.e4 Nf6 29.Nf8 Qf8 30.Qb3 Kd7 31.Nd6 cd6 32.Rc8 Kc8 33.g5=) 28...Kd7 (28...Qg5 29.Nd6 cd6 30.Qe4 Kd7 31.Rc8 Kc8 32.Ke1-+) 29.Qe4 (29.Nh7 Rh8 30.e4-+) 29...Qf6 (better 29...Qg5 30.Nd6 cd6 31.Rc8 Rc8-+) 30.Nd6? (better 30.Nh7 Qh8 31.Nd6 cd6 32.Nf8 Qf8 33.Rc8 Kc8 34.Ke1=) 30...Qd6-+ (30...Kd6?! 31.Nh7 Qe6 32.Qe6 fe6 33.Nf8 Rf8 34.e4=) 31.Qf4?? (better 31.Qf3 Qa3 32.Kg2-+) 31…f5 (31...f5 32.Rh7 Ne7-+) 0–1. AhmedSultanov (1710) – Retza (1725), lichess.org, 2019.

5.g4 Be6 6.Nc3-/+.

5.g4 Bg6 6.Bg2 c6 7.bc6 (7.h4 h5 8.g5 Bd6=+) 7...bc6-/+ 8.c4 (better 8.Nc3!?-/+) 8...Rb8 (8...dc4?! 9.Bc6 Rc8 10.Bd7 Qd7 11.Be5=+) 9.Qa4?? (better 9.Bc3 Qb6 10.cd5 cd5 11.Nf3 Qb1 12.Rb1 Rb1 13.Ne5 Rd1 14.Kd1 Ne5 15.Be5-+) 9...Rb2 10.Qc6 (10.Nc3 Bc2 11.Qc6 Ne7-+) 10...Rb1 (10...Bb1!? 11.Bd5 Ne7 12.Qa8 Qa8 13.Ba8-+) 11.Rb1 Bb1 12.Bd5 Ne7 13.Qb5 Nd5 14.Qd5 (14.Qb1 Nb4-+) 14...Be7 (14...Ba2 15.Nf3 Qc7 16.d3-+) 15.Nf3 e4 16.Ng5 (16.0-0 Qb8 17.Ng5 Bg5 18.Qg5-+) 16…Bg5 0-1. Yuris__ - spaces (1655), Rated Classical game, lichess.org, 2013.

4.a3 Nf6 5.a4 (5.Nf3 a6-/+) 5...c6 (5...Nbd7 6.Nf3-/+) 6.Nf3 cb5 7.ab5 Qb6 8.e3 Bd6 (8...Nbd7 9.Nh4 Bg6 10.Be2=) 9.Be2 (9.Bd4 Qd8=) 9...Bg6 10.0-0 0-0 11.c4 dc4 12.Na3 Rc8 (12...Ba3 13.Ba3 Rc8= (worse 13...Qb5 14.Nd4 Qb6 15.Bf8 Kf8 16.Bc4+/-)) 13.Nc4+/- Qc7? (13...Qd8 14.Nh4+/-) 14.Nd6?? (better 14.b6 Qd8 15.Ra7+-) 14...Qd6+/- 15.Be5 Qe7 16.Bc3 (16.Qa4 Nbd7+/-) 16...Nbd7 17.Qb3 Nc5 18.Qa3 Rc7?? (better 18...Nd5+=) 19.Bb4 (better 19.b6!? Rcc8 20.Bf6 Qf6 21.ba7 Na6+-) 19...b6? (better 19...Nd5 20.b6! Rcc8 21.ba7 b6+-) 20.d4 1-0. ZibbitVideos (2330) - spab (2085), Rated Bullet game, lichess.org, 2015.

4.a4 a6 5.e3 Nf6 6.c4 Be7 7.Nf3 0-0 8.Be2 c5 9.0-0 ab5 10.ab5 Ra1 11.Ba1 Nbd7 12.d4 dc4 13.Bc4 Nb6 14.Be2 Qc7 15.Nbd2 (15.dc5 Bc5 16.Bf6 gf6=) 15...Rc8 (15...c4 16.Bc3=+) 16.dc5 Bc5 (16...Qc5 17.Bd4 Qc7 18.Be5=) 17.Bf6 gf6 18.Nb3 Be7 19.Nbd4 (19.Qd4 Nd5+=) 19...Bg6= 20.Qa1 (20.Nh4 Bd6 21.Ng6 hg6=) 20...Nd5 21.Nb3 (21.Kh1 e5 22.Nb3 Qd8=) 21...Nc3=+ 22.Re1 (better 22.Nfd4!?=+) 22...Ne2-+ 23.Re2 Qc4 24.Qb2 (24.Qa2 Bc2 25.Rc2 Qc2 26.Qc2 Rc2-+) 24...Bb4 25.h3 (25.b6 Bc3 26.Qa2 Qb4-+) 25...Bd3 (worse 25...Qb5 26.Nbd4 Qc4 27.Nd2 Qc1 28.Nf1-+) 26.Nbd2 (26.Rd2 Bd2 27.Nfd2 Qc3 (27...Qb5?! 28.Qf6 Qh5 29.Qd4-+) 28.Qc3 Rc3-+) 26...Qc2 (26...Qc1 27.Qc1 Rc1 28.Re1 Bd2 29.Rc1 Bc1 30.b6-+) 27.Qc2? (better 27.Qb4 Be2 28.b6-/+) 27...Rc2-+ (27...Bc2?! 28.Re1 Bc3 29.e4-/+) 28.Re1 Bd2 (worse 28...Rd2 29.Nd2 Bd2 30.Rd1+/-) 29.Rd1 (29.Nd2 Rd2 30.b6 Rb2-+) 29…Rc1 (29...Rc1 30.Rc1 Bc1-+) 0-1. BeepBeepImAJeep (2730) – GMVallejo, lichess.org, 2020.

4.f3 a6 5.e3 -/+.

4.f3 Nf6 5.g3 (5.e3 Bd6=+) 5...Nbd7 (5...a6 6.e3-/+) 6.h4 (6.e3 a6-/+) 6...h6 (6...Bd6 7.Kf2 e5 8.e3-+) 7.Bg2 Bd6 8.Kf2 (8.g4 Bg3 9.Kf1 Bh7-/+) 8...Bh7 (8...c6 9.Nc3-+) 9.d3 (9.e3 a6-/+) 9...Qe7 (9...c6 10.a4-+) 10.e4 (10...de4 11.de4 Bc5 12.Kf1-+; 10.e3 e5-/+). MasterofDisaster – burn89, Live Game Caissa's Web, 2005.

4.h3 Ne7 5.g4 (5.Nf3 Qd6=) 5...Be4=+ 6.Rh2 (6.Nf3 Ng6=+) 6...h6 (6...Qd6!? 7.f4 Qf4-+) 7.f3 (7.e3 Qd6 8.f4 Nd7=+) 7...Bh7 (7...Qd6 8.Rf2 Bg6 9.e3=+) 8.e4 (8.f4!?=+) 8...de4-/+ 9.fe4 Be4 10.Re2 Qd5 (10...Bg6 11.Nc3-/+) 11.Nc3=+ Qd4 (11...Qe5 12.Re4 Qg3 13.Ke2 Qg1 14.Qe1=+) 12.Re4= Qg1 13.Qf3 Ng6 (13...c6 14.Rf4 f6 15.d4=) 14.0-0-0 (better 14.Re2 Be7 15.Nd1=) 14...Qb6?? (14...c6 15.bc6 bc6 16.d4=) 15.Nd5?? (15.Na4 Qg1 16.Re3+-) 15...Qd6= 16.Nc3 (16.Nf4 Nh4 17.Qe3+/-) 16...Ne5?? (16...c6 17.Ra4=+) 17.Qe3?? (better 17.Re5 c6 18.Rde1+-) 17...Nbd7 18.d4 (18.Bg2 c6=+) 18...Ng6=+ 19.d5 e5 20.Bd3 (20.Qf3 a6=+) 20...Be7-/+ 21.Ra4?? (better 21.Qf3-/+) 21...Bg5-+ 22.Qg5 hg5 23.Ne4 Qd5 (23...Qb6!? 24.Bc3 Nf4 25.Bf1-+) 24.Ng5 (24.Bc4 Qd1! 25.Kd1 Nb6-+) 24...e4 (better 24...Qc5 25.Kb1-+) 25.Re4 Nge5 (better 25...Kd8 26.Nf3 c6-+ (26...Qa2?! 27.Bc4 Qa4 28.Ng5-+)) 26.Re5 (26.Re3 Qc5 27.Rde1-+) 26...Ne5 27.Re1 f6 28.Ne4 (28.Bg6 Kf8 29.Ba3 Kg8 30.Re5 fe5 31.Bf7 Qf7 32.Nf7 Kf7-+) 28...Qa2 (28...Nd3!? 29.cd3 0-0-0 30.Re3-+) 29.g5 Nd3 30.cd3 0-0-0 31.gf6 (31.Re3 Qb3 32.b6 Qb6-+) 31...gf6 (better 31...Rh3 32.Nf2 Rh5 33.Re2 gf6 34.Rc2-+) 32.Bf6 (32.b6 Rh3 33.ba7 Rh2 34.a8Q Qa8-+) 32...Qa3 (32...Rh3!? 33.Rd1 Rd5 34.Rg1-+) 33.Bb2 Qd3 34.Bh8 Rh8 35.b6 ab6 36.Nd2 Rh3 37.Rg1 (37.Rf1 Qc3 38.Kb1 Qd2 39.Rf8 Kd7 40.Rf7 Ke6 41.Re7 Ke7 42.Ka1 Rh1) 37...Qc3 38.Kd1 Rd3 (38...Qa1 39.Ke2 Qg1 40.Nf3 Qg2 41.Kd3 Qf3 42.Kd4 Rh4 43.Ke5 Re4 44.Kd5 Qd3) 39.Rg8 Kd7 40.Rg2 Rh3 41.Ke2 Qe3 (41...Re3 42.Kd1 Qa1 43.Nb1 Qb1 44.Kd2 Rd3 45.Ke2 Qc2 46.Ke1 Rd1) 42.Kd1-+ Rh1 43.Kc2 Qc5 (43...Qc5 44.Kd3 Qd5 45.Kc3 Rh3 46.Kc2 Qc6 47.Kb1 Rh1 48.Kb2 Qc1 49.Kb3 Rh3 50.Rg3 Rg3 51.Nf3 Rf3 52.Kb4 Qc3 53.Kb5 Qb3) 0-1. poputchik (1655) - raumlich (1700), Rated Classical game, lichess.org, 2013.

4.h3 Nf6 5.g4 Bg6 6.Bg2 Bc5 7.e3 0-0 (7...a6 8.h4 h6 9.h5=+) 8.Nc3 c6 9.a4 (9.h4 h5 10.gh5 Bh5=) 9...Nbd7 10.Ba3 (10.d3 e5=+) 10...Ba3 11.Ra3 Qa5 12.Nge2 cb5 13.Nb5 a6 14.Nd6?? (better 14.Nbd4-/+) 14...b5 (14...Qc5!? 15.Rb3 Qd6 16.Rb7-+) 15.Qa1 (15.g5 Nh5-+) 15...Qb6 (15...b4!? 16.Rb3 Qc7 17.Nf7 Rf7 18.Rb4 Bc2 19.Nf4-+) 16.g5 Nh5 (16...Qd6?! 17.gf6 b4 18.fg7-/+; 16...Bc2?! 17.gf6 Nf6 18.e4=) 17.ab5 Qd6 18.ba6 (18.d3 a5!-+) 18...Bc2 19.a7 Nc5 20.0-0 Bd3 21.Re1 (21.Bf3 Bg6-+) 21...Be4 (21...Qe7 22.f4-+) 22.Be4 (22.d4 Nd3 23.Rd1-+) 22...Ne4 23.Ra6 (23.d4 Ng5 24.Kg2 Ne4-+) 23...Qc7 (23...Qe7 24.h4 Nd2 25.Nd4-+) 24.Rc1 (24.Qd4 Qe7 25.f4 Rfc8-+) 24...Qe7 25.h4 Nd2 (25...Nd2 26.Nd4 Nc4-+) 0-1. poputchik - MillerTime (1765), Rated Classical game, lichess.org, 2013.

5.e3 Bd6 6.c4 0-0 7.Nf3 c5 8.Be2 Nbd7 9.0-0 Re8 10.d4 dc4 11.Bc4 Rc8 12.Nbd2 Nb6 13.Be2 cd4 14.Nd4 Bg6 15.Rc1 (better 15.a5!? Nbd5 16.a6 ba6 17.Nc4 ab5 18.Nd6 Qd6 19.Nb5=) 15...Rc1-/+ 16.Bc1 e5 17.N4f3 e4 (17...Qc7 18.a5 Nbd5 19.Nc4=+) 18.Nd4 Qc7 19.h3 Nbd5 20.Bb2 Nc3 21.Bc3 Qc3 22.Nc4 Bb8 23.Qa1 Qb4 24.Rb1 Qc5 25.Na5?? (better 25.a5=) 25...Qc7-+ 26.g3 Qa5 27.Nb3 (27.Rc1 Be5-+) 27...Qc7 28.a5 h5 (28...Qd7 29.Bf1-+) 29.Nd4 (29.Rc1 Qd7 30.h4 Be5-+) 29...h4 30.Rc1 Qd6 31.Rd1 (31.Qc3 hg3 32.f4 ef3 33.Bf3 Be4-+) 31...hg3 32.Nf5 (32.f4 ef3! 33.Bf3-+) 32...gf2 33.Kf1 (33.Kf2 Qh2 34.Ke1 Bf5 35.Qb2 Bg3 36.Kd2-+) 33...Qh2 34.Bg4 Bf5 35.Bf5 Qg1 (35...Nh5 36.Bh7 Kh7 37.Qg7 Kg7 38.Ke2 f1Q 39.Kf1 Ng3 40.Ke1 Qe2) 36.Ke2-+ Qg2 37.Rf1 Qf3 38.Kd2 Rd8 39.Kc2 (39.Bd7 Rd7 40.Qd4 Rd4 41.ed4 Bd6 42.Rf2 Qf2 43.Kc3 Nd5 44.Kb3 Ne3 45.Kc3 Qc2) 39...Qe2 40.Kb1 (40.Kb3 Rd3 41.Qc3 Rc3 42.Kc3 Be5 43.Kb4 Qb2 44.Ka4 Qc2 45.Kb4 Bd6) 40...Qf1 41.Kb2 Qe2 (41...Rd2 42.Kb3 Qb5 43.Kc3 Be5 44.Kd2 Qd3 45.Kc1 f1Q) 42.Kb3 f1Q (42...Qb5 43.Kc2 Qd3 44.Kb2 Be5 45.Ka2 Qc2 46.Qb2 Qb2) 43.Bh7 Kh8 44.Qf1 (44.Qb2 Qc4 45.Ka3 Bd6 46.Qb4 Qa1) 44...Qf1 (44...Rd3 45.Ka4 Qc2 46.Kb4 Bd6) 45.Kb4 (45.Kb4 Qb1 46.Ka4 Qc2 47.Kb4 Bd6; 45.a6 Qb5 46.Kc2 Be5 47.ab7 Qb2) 1-0. BeepBeepImAJeep (2595) - HardSign (2530), lichess.org, 2019.

5.e3 Nbd7 6.Nf3 Be7 7.c4 dc4 (7...0-0 8.a5=+) 8.Bc4= 0-0 9.0-0 h6 (9...Bd6 10.a5=) 10.Bf6 (10.a5 Rb8=) 10...Bf6 (worse 10...gf6 11.d4+=) 11.d4 Nb6 (11...c5 12.bc6 bc6 13.Bd3=) 12.Nbd2 (12.Bd3 Bd3 13.Qd3 a6+=) 12...Nc4= 13.Nc4 Qd5 14.Nce5 (14.Nfe5 Rfd8=) 14...Be5 (14...a6 15.ba6 Ra6 16.Qc1=+) 15.Ne5 a6 16.g4 (16.f3!? Qd6 17.e4+=) 16...Bh7=+ 17.Rb1? (better 17.Qf3=+) 17...Bb1-+ 18.Qb1 ab5 19.ab5 (19.Qb5 f6 20.Ng6 Rf7 21.Qd5 ed5-+) 19...Ra5 20.e4? (20.Qc2 Rc8-+) 20...Qb5 (better 20...Qd4!? 21.Nf3 Qd6 22.Kg2-+) 21.Qb5 Rb5 22.f3 (22.Rc1 c6 23.Rc4-+) 22...Rd8 23.Rd1 (23.Kf2 Rd4 24.Ke3 Rd8-+ (24...Re5?! 25.Kd4 Ra5 26.e5-+)) 23...c6 (better 23...Re5 24.Kf2-+) 24.d5 (24.f4 g5-+) 24...ed5 25.ed5 (25.Nc4 Rb4 (25...dc4?! 26.Rd8 Kh7 27.Rd4-+) 26.Ne3 Re8-+) 25...Rbd5 (worse 25...cd5 26.h4-+) 26.Rd5 (26.Re1 Re8 27.f4 g5-+) 26…Rd5 (26...Rd5 27.f4 g5-+) 0–1. AleksandrNekhoroshik (1685) – Phomopsis (1665), lichess.org, 2021.

5.e3 Be7 6.c4 0-0 7.Nf3 c5 8.Be2 dc4 9.Bc4 Nbd7 10.Be2 Nb6 11.0-0 a5 12.Nc3 (12.d3 Nfd7=) 12...Rc8 13.d4 cd4 14.Nd4 Bg6 15.Rc1 (15.Qb3 Nbd7=) 15...Nc4 (15...Qd6 16.Qb3=+) 16.Ba1 (16.Bc4 Rc4 17.Qb3 Rc8=) 16...Ne5 (16...Ba3!? 17.Bc4 Bc1 18.Ne6 Qd1 19.Rd1 Rfe8-/+) 17.Qb3 Ned7 18.Rfd1 Nc5 19.Qa2 Nce4?? (better 19...Qb6=) 20.Ne4 (better 20.Ne6!? Qe8 21.Nf8 Qf8+-) 20...Ne4 21.Rc8?? (better 21.Ne6 Rc1 22.Nd8 Rd1 23.Bd1 Rd8 24.Bd4+-) 21...Qc8= 22.h3 (22.Qb2 Bf6=) 22...e5 (22...Rd8!?=) 23.Nf3+= Qf5 (23...Nc3!? 24.Bc3 Qc3+=) 24.Be5 Bf6 25.Bf6 Nf6 (25...Qf6 26.Qc4+/-) 26.Bd3 (26.Bd3 Ne4 27.Qc4+-) 1-0. BeepBeepImAJeep (2580) - ED1N0R0Gg (1735), lichess.org, 2018.

4.e3(--> 3.e3 e6 4.b5).

4.e3 c5 5.c4 Nf6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5 6.c4).

4.e3 Nf6 5.c4 Be7 6.Nf3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.c4).

4.e3 Nf6 5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5).

4.e3 Nf6 5.Nf3 Nbd7 6.c4 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5).

4.e3 Nf6 5.Nf3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Nbd7).

4.e3 Nf6 5.Nf3 Be7 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7).

4.e3 Nf6 5.Nf3 h6 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6).

5.d4 a6 6.a4 (6.e3 Be7=+) 6...ab5-/+ 7.ab5 Ra1 8.Ba1 c5 (8...Ne4 9.e3=+) 9.e3 (9.dc5 Bc5 10.e3 Qa5 11.Bc3 Bb4=+) 9...c4-/+ 10.Nc3? (better is 10.Bc3-/+) 10...Bb4 11.Be2 (11.Bb2 Qa5 12.Qa1 Ne4-+) 11...Ne4 12.0-0 Bc3 13.Bc3 Nc3 14.Qa1 (14.Qd2 Nb5 15.Ra1-+) 14...Ne2 15.Kh1 Bc2 16.Qb2 (16.Ne1 Bd3 17.Nd3 cd3-+) 16...Bd3 17.Ne5 (17...Ng3! 18.hg3 Bf1 19.Kg1-+). vidyashankarh (2055) – laurensjulia (1800), net–chess.com, 2003.

5.e3 Bd6 6.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6).

4.Nd2 e5 5.e4 de4 (5...Bg6 6.a3=) 6.de4 Bg6 (6...Be6 7.a3=) 7.a3 Ngf6 8.Bd3 (8.Ngf3 A) worse 8...Be4 9.Ne4 (worse 9.Ne5 Bd5=; worse 9.Be5 Bd5=) 9...Ne4 10.Qd5+-; B) 8...Ne4 9.Ne4 Be4=) 8...Bd6 (8...a5 9.ba5 Bd6 10.Ngf3=) 9.Ngf3 0-0 10.0-0 Re8 (10...Qe7 11.Nh4=) 11.c4 (11.Re1 Nb6=) 11...b6 (11...c5 12.Qb3=) 12.Qc2 (12.Bc3 a5+=) 12...c5 13.b5 (13.Bc3 Bh5+=) 13...Bc7 (13...Qc7!?=) 14.a4 (14.Bc3 Nf8 15.g3 Qd7=) 14...Qe7 (14...Bh5 15.Bc3+=) 15.Nb1 (15.Nh4 Nf8 16.Ndf3 Rad8+=) 15...Rad8 (15...Nf8!?=) 16.Nc3+- Nf8 (16...h6 17.Rfd1+-) 17.Nd5 Qd7 (17...Nd5 18.cd5 (18.ed5? e4 19.Rae1 Nd7-+) 18...Bh5 19.Be2+-) 18.h3 (18.Rfd1 Ne6 19.Ne5 Be5 20.Be5 Ng4+-) 18...Nd5+= 19.cd5 (19.ed5? e4 20.Qc3 f6-+) 19...f6 (19...Bh5!? 20.Ne1 Ng6+=) 20.Bc4 (20.Nh4 Bf7+-) 20...Kh8 (20...Bf7 21.a5+-) 21.Bb3 (21.Nh4!?+-) 21...Bf7 (better 21...Bh5 22.Nh4 Ng6+=) 22.d6?? (better 22.Kh2+-) 22...Bd6-/+ 23.Bf7 (23.Rfd1 Bb3 24.Qb3 Ne6-/+) 23...Qf7 24.Rfd1 (24.a5 Ne6-/+) 24...Ne6 25.Rd6?? (better 25.Qc4-/+) 25...Rd6-+ 26.Rd1 (26.Bc1 Nd4 27.Nd4 ed4-+) 26...Red8 27.Rd6 Rd6 28.Bc3 (28.g3 Nd4 29.Bd4 ed4-+ (worse 29...cd4 30.Qc8 Qg8 31.Qc7-+; 29...Rd4?! 30.Nd4 ed4 31.e5-+)) 28...Nd4 29.Nd4 (29.Bd4 ed4 (29...Rd4?! 30.Nd4 ed4 31.a5-+) 30.Qc1 d3-+) 29...ed4 (worse 29...cd4 30.Bd2-+; 29...Rd4?! 30.Bd4 ed4 31.a5-+) 30.Bd2 h6 31.a5 (31.Bf4 Rd8 32.f3 d3-+) 31...Qe7 (31...d3 32.Qa4-+) 32.f3 (32.ab6 ab6 33.f3 Qe6-+) 32...Qd7 33.ab6 (33.Qc4 Qe6 34.Qa4 c4-+) 33...ab6 34.Qc4 (34.Qa4 d3-+) 34...d3 (34...Qe6 35.Qe6 Re6 36.Bf4-+) 35.Kf2 (35.g4 g5-+) 35...Rd4 36.Qa2 (36.Qb3 Qc7-+) 36...Qb7 (36...Qb5!? 37.e5 fe5 38.Qe6-+) 37.Be3 (37.Qe6 Rd8-+) 37...Rb4 (37...Rd8!? 38.Bd2-+) 38.Bd2 Rd4 39.Bc3?? (better 39.Be3=) 39...Rd6 (39...Rd8 40.Bd2-+) 40.Ke3 (40.Bd2 Kh7-+) 40...Rd8 (40...Qd7 41.Qb2-+) 41.Qa1 (41.Qe6 Qd7 42.Qd7 Rd7-+) 41...Ra8 (41...Qc7 42.Qe1-+) 42.Qb2 Qd7 (better 42...c4 43.Kf2-+) 43.e5 (43.h4 Rd8 44.g4 c4-+) 43...fe5 44.Be5 (44.Qb3 Rd8 45.Qb2 Kh7-+) 44...Re8 (better 44...Qd5 45.Bg7 Kg8-+) 45.Kd2 (45.f4 Rd8 46.Qd2 Qb5-+) 45...Kh7 (better 45...Qd5 46.f4 Ra8 47.Ke3-+) 46.f4 Re7 (better 46...Qd5 47.Kd1-+) 47.g4 (47.Qb3-+) 47...Qd5 48.Qc3 (48.Qb1 Rd7 49.h4 Qg2 50.Kc3-+) 48...Rd7 49.Bg7 Rg7 (49...Qg2 50.Kc1 d2 51.Qd2 Qd2 52.Kb1 Kg7 53.f5 Qe2 54.f6 Kf7 55.g5 Rd1) 50.Qd3-+ Qd3 51.Kd3 Rd7 52.Ke3 (52.Kc2-+) 52...Rd4 (52...c4 53.g5 c3 54.f5 c2 55.g6 Kg7 56.f6 Kg6 57.Ke4 c1Q 58.h4 Qc2 59.Kf4 Qf2 60.Kg4 Rd4 61.Kh3 Rh4) 53.f5 Kg7 54.h4 Rg4 55.h5 Kf6 56.Kf3 Rd4 (56...Rd4 57.Ke3 Rd7 58.Ke4 c4 59.Kf4 c3 60.Kg4 c2 61.Kf3 c1Q 62.Ke2 Qc2 63.Kf3 Rd3 64.Kf4 Qc4) 0–1. Pereira,Antonio Samuel (1675) – Dos Anjos,Dialison Alves (1800), Camp. Mineiro Classico, 2016.

4.Nf3 f6 5.e3 (5.e4 de4 6.Nd4 e6+=) 5...e5 6.c3 Nh6 7.Nbd2 Bd6 8.a3 0-0 9.Qc2 Re8 (9...a5 10.Be2=+) 10.Be2 e4 (10...c5!?=) 11.de4+= de4 (11...Be4 12.Ne4 de4 13.Nd4+=) 12.Nd4 Bg6 13.0-0 (13.Bc4 Nf7+=) 13...c5 14.bc5 (14.Nb5 Bb8 15.Nc4 Qe7+=) 14...Nc5= 15.N4b3 (15.Nb5!?=) 15...Nd3=+ 16.Bd3 (16.Nd4 Qc7 17.h3 Bh2 18.Kh1 Be5 19.Qb3 Kh8=+) 16...ed3-/+ 17.Qd1 Qc7 18.h3 Rad8 19.Nd4 Nf5 20.N2f3 Bc5 (20...Nd4 21.cd4 Qc2 22.Qd2-/+) 21.Qb3 (21.Ne1 Kh8=) 21...Kh8 (better 21...Bf7!? 22.Qd1 Bd4 23.cd4 Qc2-/+) 22.Ne6= Re6 23.Qe6 Re8 (23...Rd6 24.Qb3+=) 24.Qb3+= Re3 25.fe3 Be3 26.Rf2 Ng3? (26...Bf7 27.Qb5 Bf2 28.Kf2 Qg3 29.Kg1 Ne3-/+) 27.Qe6?? (better 27.Re1 Ne2 28.Ree2 de2 29.Qb5+-) 27...Qc5 28.Nd4 Ne2?? (28...Ne4 29.Qd7 Bf2 30.Kf1 h6-+) 29.Kf1+- Nd4?? (better 29...Bf2 30.Qd7 h6 31.Kf2 Kh7+-) 30.cd4 Bd4 (30...Qb5 31.Qe3 d2 32.Re2+-) 31.Bd4 (31.Bd4 Qc6 32.Rf6 Qe6 33.Re6+-) 1–0. e4_e5_f4 (1760) – justme57 (1755), lichess.org, 2020.

4.g3 e5 5.Bg2 (5.Qd2 Ngf6-/+) 5...c6 (5...Bb4 6.c3 Bc5 7.Bd5-/+) 6.Nf3 (6.a3 a5=+) 6...Bd6 (6...Bb4!? 7.Nbd2 Qf6-/+) 7.0-0=+ Ngf6 (7...Qf6 8.a3=+) 8.a3 (8.c4 0-0=+) 8...0-0 9.Nbd2 (9.c4 Re8=+) 9...h6 (9...a5 10.c4=+) 10.Nb3 (10.c4 Re8=) 10...Re8 (10...Qc7 11.c4=+) 11.Kh1 e4 12.de4 Ne4 13.Nfd2 Nd2 14.Qd2 Nf6 15.Nc5 Ne4 16.Ne4=+ Be4 17.f3 Bf5 18.Rad1= Qc7 19.e4+= Be6 20.f4 Rad8 21.e5 Bf8= 22.f5 Bc8 23.Rde1 Bd7 24.Qf2 Bc8 25.Qa7+/– Be7 26.Bd4+- (26...Bd7 27.Bb6+-) 1–0. alexp (2290) – nspaulding (2085), net–chess.com, 2006.

5.dc4 =+.

5.e4 -/+.

5.a3 e6 6.g3 c5 7.bc5 Bc5 8.Bg2 (8.Nb3 Qb6 9.e3 0-0+=) 8...0-0 (8...Qb6 9.Bf6 Bf2 10.Kf1 Nf6 11.c3-+) 9.f3? (9.Nb3 Qb6 10.e3 Rac8+=) 9...Rc8 (9...Qb6!? 10.d4 Qb2 11.dc5 Nc5 12.Qb1-+) 10.Nb3 Be3 (10...Qb6 11.Nc5 Qb2 12.Nd7 Qc3 13.Kf2 Nd7 14.e4 Qd4 15.Kf1-/+) 11.Bd4 Bd4 12.Nd4 Bg6 13.Nh3 (13.f4 Rc3-/+) 13...h6 (13...Qc7 14.Nb3-+) 14.e4 (14.f4 Bf5+=) 14...Qb6 (14...Qa5 15.Qd2 Qc5-/+) 15.c3? (better is 15.Ne2!?-/+) 15...Rc3-+ 16.Ne2 Qe3 17.Qd2 Rd3 18.Qe3 Re3 19.Kf2 Rb3 20.Rhb1 Rb1 21.Rb1 Nc5 22.Nc3 b6 23.Nf4 de4 24.Ng6 fg6 25.Ke3 ef3 26.Bf3 Rd8 27.Be2 (27.Rd1 Rd1 28.Bd1 a6-+) 27...g5 28.Nb5 a5 29.Nc7 Rd7 30.Nb5 Nd5 31.Kf3 Kf7 32.Nd4 (32.h3 Kg6-+) 32...g6 (better is 32...Nc3!? 33.Rf1 Rd4 34.Ke3 Ke7 35.Kd4 Ne2 36.Kc4-+) 33.Bc4 g4! 34.Kg2 (34.Kg4 Nf6 Double attack) 34...Ne3 35.Kf2 (35.Kg1 Rd4 36.Be2 Rd2-+) 35...Nc4 36.Nc6 Rd2 37.Kg1 Ne3 (better is 37...Nd3 38.Rf1 Ke8-+) 38.Rb6 (38.Re1 Nc2 39.Ne5 Kf6-+) 38...Rg2 (38...Nd3 39.Rb7 Kf6 40.Rf7 Kf7 41.Ne5 Ne5 42.h4 Nf3 43.Kh1 Rh2) 39.Kh1-+ Nd3 40.Ne5 (40.Rb7 Kf6 41.Rb2 Rb2 42.h4 Rg2 43.Na5 Nf2) 40...Ne5 41.Rb3 (41.Rb1 Nf3 42.Rb7 Kf6 43.Rf7 Kf7 44.h4 Rh2) 41...Re2 (41...Nf3 42.Rb7 Kf6 43.Rf7 Kf7 44.h4 Rh2) 42.Kg1 Nf3 43.Kh1 Re1 0–1. preethan (2295) – mpenga (2585), net–chess.com, 2016.

5.Ngf3 e6 6.a3 c5 7.b5 Bd6 8.a4 Qc7 9.Nh4 Bg6 (9...Bh2 10.Nf5 ef5 11.Nf3 Qa5 12.Qd2-/+) 10.Ng6+= hg6 Will h2 fall? 11.h3 Ng4 (11...Qa5 12.e3+=) 12.e4 (12.Bg7? Nf2 13.Kf2 Bg3 14.Kg1 Qf4-+) 12...f5 (12...Ngf6 13.a5=) 13.Be2 (worse is 13.Bg7 Bg3 14.Qg4 fg4 15.Bh8 Be5 16.Be5 Qe5+=) 13...Bg3?? (better is 13...Ngf6=) 14.Bg4+- (14.fg3?? Qg3 15.Kf1 Qf2) 14...fg4 (14...de4 15.de4 (15.Bg7?! Rh7+/–) 15...fg4 16.Qg4+- (16.fg3?! Qg3 17.Ke2 Qg2 18.Ke3 Qg3 19.Ke2 Qg2 20.Ke3 Qg3 21.Ke2 Qg2=)) 15.Qg4 Bf2 16.Kf2 Rf8 17.Nf3 0-0-0 18.Rhf1 c4 19.Kg1 c3 20.Ba3 Rf4 21.Qe6 de4 22.Bd6 Qb6 23.d4 Rf5 24.Qc4 Nc5 25.Bc5 Qc7 26.Qe6 Kb8 27.Ne5 Re5 28.Qe5 (28.Qe5 Kc8 29.Qe4+-) 1–0. Mlynek – NN, ZDK–Sarzyna Poland, 1984.

5.Ngf3 e6 6.a3 c5 7.b5 Bd6 8.Nh4 Bg6 9.Ng6 hg6 10.Nf3 (10.h3 Qa5+=) 10...e5 (10...Qa5 11.Qd2 Qb5 12.Rb1-/+) 11.g3 (11.Qd2 Qb6+=) 11...Qa5-/+ 12.Qd2 Qb5 13.c4 dc4 14.dc4 Qb6 15.Bg2 Ne4 16.Qc2 Qa5 17.Kf1 f5 (17...Nef6 18.Rd1 Qc7 19.Ke1+=) 18.Rd1 (18.Nh4 Rh6=) 18...0-0-0 (better is 18...Qb6!?+=) 19.Nh4+= Ndf6 (19...Bc7 20.Ng6 Rhe8+=) 20.Be4?? (better is 20.f3!?+/–) 20...Ne4 (20...fe4!? 21.Ng6 Rh5=) 21.Ng6+= Rhe8 (21...Rh6 22.Nh4 Rh4 23.gh4 Bc7 24.Rd8 Bd8 25.Be5 Bh4+/–) 22.f3+/– Nf6 23.Qf5 Kb8 24.Ne5 Qc7 25.Nd3 Ne4 26.f4 Qc6 27.Qd5 Qa4+= 28.Kg2 Bf4 29.Qf7 Rf8?? 30.Qe6 Ng5 31.Be5?? Ka8-+ 32.Qg6? Qc2?? 33.Nf4+- (33.Nf4 Qg6 34.Ng6+-; 33.Bf4?? Qe2 34.Nf2 Qf3 35.Kg1 Rd1 36.Nd1 Nh3#; worse is 33.gf4 Qe2 34.Kg3 Qf3 35.Kh4 Rf5 36.fg5 Rh8 37.Qh6 gh6 38.Bh8 hg5#) 1–0. Mlynek – NN, ZDK–Sarzyna Poland, 1984.

5.Ngf3 e6 6.a3 c5 7.c3 Be7 8.g3 (8.Nh4!?=) 8...0-0+= 9.Bg2 Qc7 10.0-0 h6 (10...e5 11.bc5 Nc5 12.d4+=) 11.Rc1 Rac8 (11...c4 12.Nd4 Bg6 13.dc4 dc4 14.Qe1+=) 12.Re1 Rfd8 13.Qb3 b5 14.c4 bc4 15.dc4 Qb6 16.bc5 Nc5 17.Qb6 ab6 18.Nd4 (18.cd5 ed5 (18...Rd5? 19.e4 Rd2 20.Nd2+-; worse is 18...Nd5 19.e4+=) 19.Nd4 Bd7=) 18...Bg6 19.cd5 Nd5 20.Nc4 Na4 21.Ba1 Ndc3?? (21...Bf6 22.e3+=) 22.Bc3?? (better is 22.Nc6 Rc6 23.Bc6+/–) 22...Rc4+= 23.Nc6 Nc3 24.Ne7 Kh7 25.Kh1 Rc5 26.h3 (26.Ng6 Kg6 27.Rc2 Kf6+=) 26...Rd2-/+ 27.Ng6 Kg6 28.Bf3 e5 29.Bb7 Ra2 30.Ra1 Re2 31.Re2 Ne2 32.Ra2 Nd4 33.Rb2 b5 34.Be4 Kf6 35.Rb4 Ke6 36.a4 Rc4 37.Rc4 bc4 38.a5 Kd6 39.a6 Nb5 40.Kg1 Kc5 41.Kf1 Kb6 42.Bd5 Nd6 43.a7 Ka7 44.Ke2 Kb6 45.Ke3 Kc5 46.Bf3 Nf5 47.Ke4 Nd4 48.Bd1 f6 49.Ke3 Kb4 50.g4 Kc3 51.h4 Kb2 52.g5 c3 53.gh6 gh6 54.f4 c2 55.Bc2 Kc2 56.fe5 fe5 57.Ke4 Nc6 58.Kd5 Kd3 0–1. Bango,Dominik – Simo,Marian (1840), Banska Stiavnica SVK, V4 Open, 2013.

5.Ngf3 e6 6.a3 c5 7.bc5 Bc5 8.e3 0-0 9.Be2 Qc7 10.0-0 Rad8 11.Nh4 Nb6 (better is 11...Bg6!?=) 12.Bf6 gf6 13.Nf5 ef5 14.Kh1 (14.d4 Bd6+/–) 14...f4 (better is 14...d4!? 15.Nb3 de3+=) 15.d4+- Bd6 16.g3 (better is 16.Bd3!? f5 17.Bf5 fe3 18.Qh5+-) 16...fg3+/– 17.Rg1 Kh8 18.fg3 Rg8 19.Bd3 Nc4 20.Nc4 dc4 21.Bf5 Rg5 22.e4 Rdg8 23.Qe2 h5 24.c3 Kg7 25.a4 Kf8 26.Raf1 Bg3? (better is 26...Ke8!?+/–) 27.Rg3+- Rg3 28.hg3 Qg3 29.Qd2 h4 30.d5 Ke8 31.Qf2 Qc3?? (31...b6 32.Qg3 Rg3 33.d6 Rc3 34.Rf4+-) 32.Qh4 (better is 32.Qa7 Qg3 33.Qa8 Ke7 34.Qb7 Kf8 35.Qb4 Ke8 36.Qb5 Ke7 37.Qc5 Ke8 38.Qc8 Ke7 39.d6 Qd6 40.Qg8+-) 32...Qd3+/– 33.Qh3 Qh3 34.Bh3+- Rg3 35.Bf5 Ra3 36.Rb1 b6 37.Rb4 Ra1 38.Kg2 c3 39.Rc4 Ra2 40.Kf3 c2 41.Kf4 Ke7 42.Bc8 a6 43.Ba6 Ra4 44.Rc7 Kd6?? 45.Rc6+- Ke7 46.Bd3 c1Q 47.Rc1 Ra7 48.Rb1 Rb7 49.Bb5 Kd6 50.Rc1 Rb8 51.Rc6 Ke7 52.Kf5 Rb7 53.d6 Kd8 54.Kf6 1–0. Kenanthonylucas – Snicks, ChessWorld.net, 2012.

4.b5 a6 5.c4 dc4 6.dc4 Qd1 7.Kd1 ab5 8.cb5 Bb1 9.Rb1 Ra2 10.e3 Nf6 11.Nf3? (11.Bc4 Ra4 12.Bb3 Ra5-/+) 11...Be7 (better 11...Ne4!? 12.Rg1 Nf2 13.Ke1 Ng4-+) 12.Bd3 0-0 13.Ng5 (13.Kc2!?=+) 13...Ng4-/+ 14.Ne4 Rd8 15.Ke2? (15.Kc2 Ba3 16.Kb3 Rb2 17.Ka3 Rb1 (17...Nf2?! 18.Kb2 Nd3 19.Kc2=) 18.Bb1 c6-/+) 15...Ne5 (15...Ba3 16.Rhd1 Rb2 17.Rb2 Bb2 18.Nc5-+) 16.Bc2?? (better 16.Rhd1 Ba3 17.Nc3 Rb2 18.Rb2 Bb2 19.Bh7 Kh7 20.Rd8-/+) 16...Nc4 17.Bb3 Rb2 18.Rb2 Nb2 19.Rc1 c6 20.bc6 Nc6 21.Rb1 Nd3 22.Bc4 Nde5 23.Ba2 Rb8 24.f4 Ng4 25.Kf3 Nf6 (worse 25...Nh2 26.Kg3 Ra8 27.Bb3-+) 26.Nf6 Bf6 27.g4 g6 (27...b5 28.Rc1 Rc8 29.Rd1-+) 28.g5 Bg7 29.Bc4 Na5 30.Bb5 Rc8 31.Bd7 Rc2 32.h3 Rc3 33.Ke2 (33.Rb5 Nc4 34.Rb7 Ne3 35.Rb8 Bf8 36.Rc8-+) 33...Rc2 (33...Nc4!? 34.Rb7 Re3 35.Kf2 Rh3 36.Rb8 Bf8 37.Bb5-+) 34.Kf3 Rh2 35.Kg3 Rd2 36.Kf3 (36.Bb5-+) 36…Rd7 0-1. Lisyonok - enigmada (1700), Rated Classical game, lichess.org, 2013.

4.b5 Nf6 5.Nf3 Nbd7 6.g3 Nb6 7.a4 h6 (7...a6 8.Bg2+=) 8.Bg2= a6 9.0-0 Be7 10.Nbd2 0-0 11.Ne5 Nbd7 12.c4 Ne5 13.Be5 c6 14.d4 (14.Qb3 Qd7=) 14...Ng4 15.bc6 bc6 (worse is 15...Ne5 16.cb7 (16.de5?! bc6 17.cd5 ed5=) 16...Rb8 17.de5 Rb7 18.cd5 ed5 19.e4 de4 20.Ne4+=) 16.cd5 cd5 17.e4 de4 18.Ne4 Ne5 19.de5 Qa5 20.Nf6? (better is 20.Nd6 Rad8 21.Nf5 ef5 22.Qe2+=) 20...gf6-+ 21.Ba8 Ra8 22.Qf3 Rb8 23.g4 Bg6 24.ef6 Bf8 25.h4 (25.Rfc1 Bd6-+) 25...Rb4 26.h5?? (26.Rfc1 Qe5 27.a5-+) 26...Qg5 27.Rfd1 (27.hg6 Rg4 28.Qg4 Qg4 29.Kh2 Bd6 30.f4 Bf4 31.Rf4 Qf4 32.Kg2 Qe4 33.Kh3 Qf5 34.Kg2 Qd5 35.Kh3 Qb3 36.Kh4 Qc4 37.Kg3 Qc3 38.Kg2 Qa1 39.gf7 Kf7 40.Kf3 Qa4 41.Ke3-+) 27...Rg4 28.Kf1 Rg1 29.Ke2 Rd1 (29...Rd1 30.Rd1 Bh5-+) 0–1. croach (2395) – iozeph (2640), net–chess.com, 2016.

4.Nd2 Bb4?? 5.Bg7+- f6 (5...Bc3 6.Bc3 d4 7.Bb2+-) 6.Bh8 Bc3 (6...Kf7 7.Rb1 Bd2 8.Qd2+-) 7.Rb1 b6 8.e4! de4 9.de4 Be4 10.Rb3 Bd2 11.Qd2 Qd2 12.Kd2 Nc6 13.Bc4 (13.Re3!? Bf5+-) 13...0-0-0? (better is 13...Rd8 14.Ke1 Bg2+-) 14.Bd3 Bg2-/+ 15.f3? Bh1-+ 16.Rc3 Ne5 17.f4? Nd3 18.cd3 Bd5 19.a3 Rd7 20.Ne2? h6 21.d4 Rh7 22.Bf6 Nf6 23.Rg3 Ne4 24.Ke1 Ng3 25.hg3 h5 26.Kf1 h4 27.Kg1 h3 28.Kh2 Bf3 29.Ng1 Bg2 30.g4 Kd7 31.d5 ed5 32.f5 Ke7 33.Ne2 c5 34.Nf4 Bf3 35.g5 d4 36.f6 Kf7 37.g6 Kf6 38.gh7 Kg7 39.Nh3 d3 40.Nf2 d2 41.h8Q Kh8 42.Kg3 d1Q 43.Nd1 Bd1 44.Kf2 c4 45.Ke3 c3 46.Kd3 c2 47.Kd2 a5 48.Kc1 b5 49.Kb2 b4 50.a4 b3 51.Kc1 Kg7 52.Kb2 Kf6 53.Kc1 Ke5 54.Kb2 Kd4 55.Kc1 Kd3 56.Kb2 Kd2 57.Kb3 c1Q 58.Ka2 Qc4 59.Ka3 Qb4 0–1. Gorniak,Weronika – Partyka,Justyna, DW Poland, 2012.

4.Nd2 Nd7 5.Ngf3 f6 (better 5...Ngf6!?=+) 6.a3 (6.e4 Bg6 7.c3 Bd6+=) 6...Bd6 7.Nd4 Ne7? (better 7...Qe7+=) 8.e4+- c5 (8...Bg6 9.Ne6 Qc8 10.Ng7 Kf7 11.Nh5+-) 9.bc5 (9.ef5 cd4 10.fe6 Nf8+=; 9.Nf5?! ef5 10.ed5 Nd5 11.bc5 Nc5= (worse 11...Bc5 12.d4+-)) 9...Bc5 10.ef5 (10.Nf5 ef5 11.d4 Qb6+-) 10...Bd4 11.Bd4 (better 11.Qh5 g6 12.fg6 Bf2 13.Kf2 Qb6 14.d4 0-0-0+-) 11...e5?! (11...Nf5 12.Bb2+-) 12.Bb2 (12.Qh5 Kf8 13.Bb2 Rc8+-) 12...Nf5 13.Be2 (13.g3 Qb6 14.Rb1 0-0+-) 13...0-0 (13...Nc5 14.Bg4 Nh6 15.Bh3+-) 14.Bg4 Nh6 (14...Nd4 15.Bd7 Qd7 16.Bd4 ed4 17.0-0+-) 15.Be6 Kh8 (15...Nf7 16.Bd5 Nc5 17.Qf3+-) 16.Bd5 Nc5 17.Bb3 (17.Bf3 Qc7+-) 17...Qc8 (17...Nf5 18.0-0+-) 18.h3 (18.Bc4 Qd7+-) 18...Qf5 (18...Nf5 19.0-0+-) 19.Qf3 (19.Bc4 Rac8 20.a4 Nf7+-) 19...Qg6 (19...Nb3 20.Nb3 Qf3 21.gf3+-) 20.Ne4 (20.0-0 Nb3 21.Nb3 Rf7+-) 20...Nb3 21.cb3 Rac8 (21...Qf7 22.d4 ed4 23.0-0-0+-) 22.Rc1 (22.0-0 Qf5+-) 22...Rc1 23.Bc1 Nf5 24.0-0 h6 (24...Nd4 25.Qe3 Rd8 26.Bb2+-) 25.b4 (25.Be3 b6+-) 25...Nd4 26.Qg4 (better 26.Qe3 Rc8+-) 26...Qh7 (26...Qg4 27.hg4 Ne2 28.Kh2 Rd8+-) 27.Qd7 f5 (27...g5 28.Qd6 Qf7 29.Bb2+-) 28.Nc5 Qg6 (28...b6 29.Ne6 Ne6 30.Qe6+-) 29.Qb7 f4 (29...Ne2 30.Kh2 f4 31.Qa7+-) 30.Qe4 (30.Qa7 f3 31.g3 h5+-) 30...Rf5 (30...Qe4 31.de4 Rd8 32.f3+-) 31.f3 (better 31.Bf4 ef4 32.Qd4 f3+-) 31...Qg3 (31...Rg5 32.Qg6 Rg6+-) 32.Qe1 (better 32.Nd7 Qg5 33.Bb2+-) 32...Nf3!-+ 33.Rf3 Qe1 34.Rf1 Qg3 (better 34...Qc3!? 35.Kh1-+) 35.Rf3 Qg6 36.Bb2 (36.Rf2 Kh7-+) 36...Rg5 37.Rf2 f3! 38.g4 (38.Rf3 Rg2 Double attack (38...Rg2 Deflection; 38...Rg3 Decoy)) 38...Qc6 (better 38...h5!? 39.Rf3 hg4 40.Rf8 Kh7 41.h4-+) 39.Ne4 (39.Kh2 Qd6 40.Ne4 Qd3 41.Ng5 hg5 42.Be5 Qe3-+) 39...Rg6 40.Rf3 h5 41.g5 Qa4 (better 41...Qd5 42.Re3 Rc6-+) 42.h4 (42.Be5 Qa3 43.Bc3-+) 42...Qd1 43.Kg2 (43.Rf1 Qd3 44.Re1 Qh3-+) 43...Qe2 (43...Qc2 44.Rf2 Qd3 45.Ng3-+) 44.Rf2 Qd3 45.Ng3 e4 46.Nh5 Qd5 (better 46...e3 47.Rf8 Kh7-+) 47.Nf4=+ Rg5 (47...Qf5!? 48.Ng6 Qg6-/+) 48.hg5= Qg5 49.Kf1 (49.Kh1 Kg8 50.Ne2 e3=) 49...e3 50.Rf3 Qb5 (50...Qd8!? 51.Bg7 Kg8=) 51.Ke1+= Qc4 52.Rh3 (52.Ne2 a5+=) 52...Kg8= 53.Ng6?? (better 53.Ne2 a5 54.Re3 ab4 55.Bd4=) 53...Qd3?? (better 53...Qc2 54.Re3 Qb2-+) 54.Rh8+- Kf7 55.Ne5 (55.Ne5 Ke6 56.Nd3+-) 1–0. Sapareva,Magdalena – Dimova,Mariya, 202–nd Open MGU, 2018.

4.e4 de4 5.de4 Qd1 6.Kd1 Be4 7.Nd2-/+.

4.e4 Bg6 5.e5 (5.Nd2 Nf6 (5...Bb4?? 6.Bg7 Bh5 7.Ne2+-) 6.e5 Nfd7=) 5...f6 (5...Bb4 6.c3 Be7 7.Nf3-/+) 6.d4 (6.a3!?=) 6...fe5 7.de5 (7.a3 e4-/+) 7...Bb4 8.c3 Bc5 9.Nd2 (9.Nf3 Nh6-/+) 9...Nc6 (9...Ne7-/+) 10.Qg4 (10.Nb3!? Bb6 11.Nf3-/+) 10...Ne5-+ 11.Qe6 Qe7 12.Qe7 Ne7 13.Bb5 (13.Ngf3 Ng4 14.Nd4 0-0-+) 13...c6 14.Ba4?? (better is 14.Be2-+) 14...0-0 (better is 14...Nd3 15.Ke2 Nb2-+) 15.Ne2 (15.Ndf3 Nd3 16.Kd2 Nb2 17.Bb3-+) 15...Nd3 16.Kd1 Nb2 (17.Kc1 Nd3 18.Kc2 Rf2-+) 0–1. kamera (1610) – gzzz (1660), GameColony.com, 2002.

4.Nf3 (--> 3.Nf3 e6 4.d3).

4.a3 (--> 1.b4 d5 2.a3 Bf5 3.Bb2 e6 4.d3).

4.a3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.a3 Bf5 4.d3 e6).

5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.a3 Bf5 4.d3 e6 5.Nd2).

5.Rb1 d4 =+.

5.b5 a6 6.a4 Be7 7.Ngf3 0-0 8.e3 c6 9.Nd4 Bg6 10.bc6 bc6 11.Be2 Qc7 12.N4f3 Nbd7 13.c4 Rab8 14.Bc3 h6 15.0-0 Bd6 (15...e5 16.cd5 Nd5 17.Qc2=) 16.Bf6= Nf6 17.d4 a5 (17...Qa5 18.Nb3 Qb4 19.c5=) 18.c5= Be7 19.Ne5 Bh7 20.Bd3 Bc5 21.Bh7 Nh7 22.Rc1 Ba3 23.Rc6 Qb7 24.Rc3 (24.Qc2!? Nf6 25.Rb1+=) 24...Bb4= 25.Rc2 Nf6 26.Nb3 Rfc8 27.Nd3 Ne4 28.f3 (< 28.Nb4 Qb4 (28...ab4?! 29.a5=+) 29.Nc5 Nc5-/+) 28...Rc2 29.Qc2 Rc8 30.Qb1 Nc3 31.Na5 Qa6 32.Nb4 (< 32.Qb4 Qd3 33.Re1 Ne2 34.Kh1 Rc2-+) 32...Qa5 33.Qb3 Qa4 ½–½. Rellstab,Ludwig Sr – Heil,Siegfried, Kiel op, 1965.

5.c3 Be7 6.Ngf3 0-0 7.Nh4 Bg4 8.h3 Bh5 9.g4 Bg6 10.Bg2 a6 11.Ng6 fg6 12.0-0 Nc6 13.a3 Bd6 14.e3 Ne5 15.Qe2 a5 16.ba5 Ra5 17.c4 dc4 18.d4 (18.dc4 c6+=) 18...Nf7 19.Nc4 (19.Bb7? Rb5-+) 19...Ra7 20.f4 Be7 21.Qd3 Nd6 22.Ne5 Qe8 (better is 22...Nd5!?+=) 23.Qb3+/– Qc8 24.f5 gf5 25.gf5 Kh8 26.fe6 Nfe4? (better is 26...c6!?+/–) 27.Rf8+- Bf8?? (27...Qf8 28.Qc2 Nf6 29.Qc7 Ra8+-) 28.Be4 Ne4 (28...Be7 29.Bc2 Qe8+-) 29.Nf7 Kg8 30.e7! Nd2 (30...Be7 31.Nd6) 1–0. Walther,Manfred (1890) – Erbe,Holger (1665), DESC, 2000.

5.e4!? de4 6.Bf6 Qf6 7.de4 =+.

5.Ngf3 Bb4 6.c3 Bd6 7.Nd4 Bg6 8.Nb5 Bf4 (8...Be7!? 9.c4-+) 9.e3-/+ Bh6 10.Ba3 (10.c4 Nbd7-/+) 10...a6 11.Nd4 Nbd7 12.Be2 c5 13.N4b3 Qc7 14.0-0 0-0 15.c4 Rac8 (15...dc4 16.Nc4 Nd5 17.Bf3-/+) 16.Bb2 (16.d4 b6-/+) 16...Rfd8 17.f4 (17.a4 e5-/+) 17...dc4 (better 17...d4!? 18.g4 de3-+) 18.dc4 Ne4 19.g4 (19.Ne4 Be4 20.Nd2 Bc6-/+) 19...Nd2 20.Nd2 White fights for the Initiative 20...f6 21.h4 (21.Nf3 Be4-/+) 21...e5 (21...Nb6 22.Bc3 e5 23.g5 ef4 24.ef4 fg5 25.Bg4 gf4 26.Bc8 Qc8 27.Ba5-+) 22.g5-/+ fg5?? (better 22...ef4 23.gh6 fe3-/+) 23.fg5+- e4 24.Rf4 (24.Qe1 Bg5 25.hg5 Ne5+-) 24...Bg5+= 25.hg5 Nf8 (25...Ne5 26.Qe1 Nd3 27.Bd3 Rd3 28.Ne4+=) 26.Bg4+- Rb8 27.Qe1 Rd6? (better 27...Qe7+-) 28.Be5+- (28.Ne4?! Be4 29.Re4 Rbd8+-) 28...Qe7 29.Bd6 Qd6 30.Rd1 Qe7 31.Qh4 b5 32.Be2 (32.Bf5 bc4 33.Rdf1 c3 34.Re4 Qf7 35.Bg6 Qg6+-) 32...b4 (32...Ne6 33.Rg4+- (33.Re4?! Be4 34.Ne4 Nc7+-)) 33.Bg4 Ne6 (33...Rd8 34.Ne4 Rd1 35.Bd1+-) 34.Be6 Qe6 35.Rc1 (better 35.Ne4!? Re8 36.Nc5 Qe3 37.Qf2 Qe7+-) 35...Rd8 36.Rc2 (36.Rcf1 Qe7 37.Nb3 Qe5+-) 36...Rd3 (36...Re8 37.Nb3+-) 37.Qg3 (37.Ne4 Rd8 38.Re2 Qe7+-) 37...Qd6 (37...Qe7 38.Qg4 Re3 39.Qc8 Be8 40.Kf2+-) 38.Qf2 (38.Qg4 Qc6+- (38...Rd2 39.Rd2 Qd3 40.Qc8 Qd8 41.Rd8 Be8 42.Re8)) 38...a5 (38...Qe7+-) 39.Ne4 Rd1 40.Kg2 Qe7 41.Qf3 Be4 (41...Rd8 42.Rd2 Re8 43.Nd6 Qg5 44.Kh1+-) 42.Re4 Qg5 43.Qg4 (better 43.Rg4 Qd8 44.Rf2+-) 43...Qd8 (43...Qg4 44.Rg4 h6+-) 44.Qe6 Kf8 45.Rf2 Qf6 46.Qe8 1–0. petrobbo (1955) – crazykaspar (2035), ChessWorld.net, 2019.

5.Ngf3 Bb4-/+ 6.Nh4 Bg4 7.c3 0-0?? (better is 7...Bd6-/+) 8.cb4+- c5 (8...Qe7+-) 9.bc5 ½–½. calu_mishu (1635) – yaunootz, internet, 2006.

4.a3 a6 5.e3 Nc6 6.Bd3 Qf6 7.Nf3 e5 (better is 7...Bd6=) 8.de5+/– Qe6 9.Bf5 Qf5 10.0-0 0-0-0 11.Nbd2 f6 12.ef6 gf6 13.c4 dc4 14.Nc4?? (better is 14.Qa4+/–) 14...Rd1-+ 15.Rfd1 Nge7 16.Rd2 Bg7 17.Rad1 Rg8 18.g3 (18.Bd4-+) 18…Qf3 0–1. Fournier,Frederic – tina71, kurnik, 2008.

4.a3 c6 5.e3 Nf6 6.c4 Nbd7 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.d4).

4.a3 Nf6 5.e3 =+.

4.Nf3 (--> 3.Nf3 e6 4.d4).

5.Nd2 a5 6.c4 =+.

5.Nd2 c6 6.c4 Ne7 7.Ngf3 h6 (7...0-0 8.e3=) 8.g3 (8.e3 0-0=) 8...Nd7 9.cd5 (9.Bg2 0-0=) 9...cd5 (9...Nd5? 10.e4+-) 10.Bg2 Nf6 (10...a5 11.Bc3=+) 11.0-0 Nh7 (11...0-0!?=+) 12.Qa4+= Nc6 13.Rac1 Qd7 (13...0-0 14.Ne5+=) 14.Rfe1 (better is 14.Nh4 Bg4 15.e4+=) 14...Bh3?? (better is 14...Rd8+=) 15.Bh3+- Ng5 16.Ng5 hg5 17.Bg2 Ke7 18.e4 Kf6 19.e5 Kg6 20.ed6 Qd6 21.Re3 a6 22.Nf3 f5 23.Rce1 Rae8 24.h4 gh4 25.Nh4 Kf7 26.Qc2 Rh5 27.Qe2 g6 28.Bf3 Rg5 29.Bg2 Nd8?? 30.Nf3+- Rh5 31.Ne5 Kf6 32.g4 Rh4 33.gf5 gf5 34.Rg3 Nf7 35.Rg6 Ke7 36.Rg7 Rf8 37.Ng6 Kf6 38.Rf7! Kg6 39.Rf8 Qf8 40.Qe6 Kg5 41.Bc1 Rf4 42.Qe5 (42...b5 43.Qf4 Kg6 44.Qg5 Kh7 45.Qh5 Kg7 46.Qh6 Kg8 47.Bd5 Qf7 48.Re8; 42.Bf4 Kh5 43.Bf3 Kh4 44.Qg6 Qg7 45.Bg5 Kh3 46.Qf5) 1–0. wlittle (2185) – bienopia (2125), net–chess.com, 2004.

5.e3 a6 6.c4 dc4 7.Bc4 b5 (7...Nf6!?=) 8.Bd3 Bd3 9.Qd3 Nf6 10.Nf3 0-0 11.0-0 Nc6 (11...c5 12.bc5 Bc5 13.e4+=) 12.Nbd2 Ne7 13.Rac1 Ng6 14.Ne4 Ng4 15.Nd6 Qd6 (15...cd6 16.d5 e5 17.Nd2=) 16.Qc3 Rfc8 17.d5 (17.Rfe1 a5+=) 17...f6= 18.de6?? (better is 18.Qd4 N4e5 19.de6 Nf3 20.gf3 Qe6 21.Qe4 Qe4 22.fe4+=) 18...Nh4!!-+ (18...Qe6 19.Qc5+=) 19.g3 (19.Nh4 Qh2) 19...Nf3 20.Kg2 Nh4 (better is 20...Nge5 21.Qc5 Qe6-+) 21.Kh3?? (21.gh4 Qh2 22.Kf3 Qh4-+) 21...Ng6 (better is 21...Qe6 22.Qb3 Qb3 23.gh4 Ne3 24.fe3 Qb2-+) 22.Kg4-/+ Qe6 23.Kf3 Qd5 24.Ke2 (24.e4!? Ne5 25.Kg2 Qe4 26.f3-/+) 24...Qh5-+ 25.Ke1 Qh2?? (better is 25...Ne5 26.Qb3 Nc4 27.Rc4 bc4 28.Qc4 Kh8-+) 26.Qb3= Kh8 27.Qf7 (27.Qd5 Rd8 28.Qe4=+) 27...Ra7?? (better is 27...Qh5!?-/+) 28.Rd1 (28.Bf6 Qh6 29.Bd4+-) 28...Ne5?? (better is 28...Qh6!?=) 29.Be5?? (better is 29.Qd5 Qh5 30.f4+-) 29...fe5+/– 30.Rd7 (better is 30.Ke2!? Qh3 31.Rh1 Qg4 32.f3 Qc4 33.Qc4 bc4 34.Rh4+-) 30...Qh6=+ 31.Kd2 Qg5 (31...Rg8 32.Re7 Raa8 33.Qe6=+) 32.Rd1 (32.Qe7 Qe7 33.Re7 a5+=) 32...e4 (better is 32...Raa8!?=+) 33.Ke1 Raa8 34.Re7 (34.Qe7 Qe7 35.Re7 c5+=) 34...Qf6 (34...Rf8 35.Qe6 Qh5 36.Qe4 a5=) 35.Qf6+/– gf6 36.Rc1 Ra7 37.Re4 c6 (37...a5 38.Rc6+/–) 38.Re6+- Rac7 39.Rf6 Kg7 40.Rf5 Kg6 (40...a5 41.e4+-) 41.Rcc5 (41.Rfc5 Kf7+-) 41...Rd7 42.Rg5 Kh6 43.f4 Rd3?? (43...Rg7+-) 44.Rce5 (44...Rd6 45.Rh5 Kg7 46.Re7 Kf8 47.Reh7+-; 44.Rc2 Re3 45.Kf1 Re1 46.Ke1 Re8 47.Kf1 Re1 48.Ke1 c5 49.Rh2#) 1–0. pascals1975 – Stiller, ChessWorld.net, 2003.

5.e3 Nf6 6.Bd3 =+.

5.c4 A) 5...Ngf6 A1) 6.Nd2 Bd6 (6...a5 7.b5 Be7 8.Ngf3 0-0 9.e3 a4 10.Be2 c6 11.c5 cb5=; 6...Be7 7.Ngf3 a5 8.b5 0-0 9.e3 Ne4 10.Be2 dc4 11.Nc4 Ndf6=) 7.c5 Be7 8.e3 0-0 9.Ngf3 a5 10.b5 Ne4 11.Ne4 Be4=; A2) 6.c5 Be7 (6...a5 7.b5 Be7 8.Nf3 0-0 9.e3 Rc8 10.Be2 Ne4 11.0-0 Bf6=; 6...a6 7.Nf3 Be7 8.e3 a5 9.b5 Ne4 10.Bd3 0-0 11.0-0 b6=) 7.Nf3 0-0 8.e3 Ne4 9.Bd3 a5 10.0-0 ab4 11.ab4 Ra1=; A3) 6.e3 Be7 (6...Bd6 7.c5 Be7 8.Nf3 a5 9.b5 Ne4 10.Bd3 0-0 11.0-0 b6=; 6...a5 7.b5 Be7 8.Nc3 0-0 9.Nf3 Rc8 10.c5 c6 11.b6 e5=) 7.Nf3 0-0 8.Qb3 Nb6 9.c5 Nc8 10.Be2 a6 11.0-0 Ra7=; B) 5...a5 B1) 6.c5 ab4 (6...Ngf6 7.b5 Be7 8.Nf3 Ne4 9.e3 Bf6 10.Qc1 0-0 11.Nc3 Nc3=; 6...Be7 7.b5 Ngf6 8.Nf3 0-0 9.e3 Rc8 10.Be2 Ne4 11.0-0 Bf6=) 7.ab4 Ra1 8.Ba1 Ngf6 9.e3 Be7 10.Nf3 Qa8 11.Bc3 Ne4+=; B2) 6.ba5 Ngf6 (6...Ra5 7.Qb3 Ra6 8.c5 Ra7 9.e3 Ngf6 10.Nf3 Be7 11.Bb5 0-0=; 6...dc4 7.Nd2 Ngf6 8.Nc4 Ra6 9.f3 Be7 10.e4 Bg6 11.Ne2 Ra7+=) 7.cd5 ed5 8.Qb3 Qc8 9.Nf3 Ra5 10.Nc3 Be7 11.e3 0-0+=; B3) 6.b5 Be7 (6...Ngf6 7.e3 Be7 8.Nf3 0-0 9.Nc3 Rc8 10.c5 Ne4 11.Bd3 Bf6=; 6...dc4 7.Nd2 Ngf6 8.Nc4 a4 9.f3 Bg6 10.e4 Nh5 11.Qc2 Be7+=) 7.e3 Ngf6 8.Nc3 0-0 9.Nf3 Re8 10.c5 Ne4 11.Ne4 Be4=; C) 5...Be7 C1) 6.e3 a5 (6...Ngf6 7.Nc3 0-0 8.Nf3 a5 9.b5 Re8 10.c5 Ne4 11.Ne4 Be4=; 6...Nb6 7.c5 Nd7 8.Nf3 Ngf6 9.Be2 a5 10.b5 0-0 11.0-0 Ne4=) 7.ba5 Ra5 8.Qb3 Qa8 9.Bc3 Bb1 10.Qb1 Ra3 11.Ra3 Qa3+=; C2) 6.Nc3 Nb6 (6...Ngf6 7.e3 a5 8.b5 0-0 9.Nf3 Rc8 10.c5 c6 11.b6 e5=) 7.cd5 ed5 8.e3 Nf6 9.Rc1 0-0 10.Nf3 a5 11.b5 Bd6+=; C3) 6.Nd2 Ngf6 (6...a5 7.ba5 Ngf6 8.Qb3 0-0 9.e3 Ra7 10.Ne2 Re8 11.Rc1 c5=; 6...Nh6 7.e3 0-0 8.Qb3 Nb6 9.Ngf3 a6 10.c5 Nd7 11.Be2 Nf6=) 7.e3 a5 8.b5 0-0 9.Ne2 Re8 10.Ng3 Bg6 11.Be2 c5=; D) 5...dc4 D1) 6.Nd2 b5 7.e4 Bg6 8.Ngf3 Ngf6 9.Qc2 a5 10.ba5 Ra5 11.Nh4 Bh5-/+; D2) 6.e3 b5 (6...Nb6 7.Nd2 Qd5 8.Rc1 Bd3 9.Ngf3 Bf1 10.Rf1 a5 11.e4 Qb5-/+) 7.Nc3 Rb8 8.g4 Bg6 9.h4 h5 10.g5 a5 11.ba5 c6-/+; D3) 6.Nc3 Nb6 (6...Ngf6 7.e3 Nb6 8.Nf3 Bd6 9.Nd2 Bd3 10.Bd3 cd3 11.Nde4 Nc4+=; 6...a5 7.ba5 Ngf6 8.e3 Ra5 9.Bc4 Nb6 10.Be2 Bd6 11.Nf3 0-0+=) 7.e4 Bg6 8.Nf3 Nf6 9.Qc2 a5 10.b5 Ra7 11.Be2 Nfd5+=.

5.Nd2 A) 5...Ngf6 A1) 6.e3 Bd6 (6...a5 7.b5 Bd6 8.c4 0-0 9.c5 Be7 10.Ngf3 Re8 11.Be2 a4=; 6...Be7 7.c4 a5 8.b5 0-0 9.Ngf3 a4 10.Be2 Ne4 11.0-0 dc4=) 7.c4 c6 8.Ngf3 0-0 9.Be2 Ne4 10.0-0 Qf6 11.Ne4 Be4=; A2) 6.Ngf3 a5 (6...Bd6 7.c4 0-0 8.c5 Bf4 9.e3 Bh6 10.Be2 a5 11.0-0 ab4=) 7.b5 Nb6 8.Bc1 Bd6 9.e3 0-0 10.c4 dc4 11.Nc4 Nc4+=; A3) 6.c4 a5 (6...Be7 7.e3 a5 8.b5 0-0 9.Ngf3 a4 10.Be2 Re8 11.0-0 dc4=; 6...Bd6 7.c5 Be7 8.Ngf3 0-0 9.e3 a5 10.Be2 Re8 11.0-0 ab4=) 7.b5 Be7 8.Ngf3 0-0 9.c5 a4 10.e3 Ne4 11.Be2 b6=; B) 5...Bd6 B1) 6.Ngf3 a5 (6...Ngf6 7.Nh4 Be4 8.e3 0-0 9.c4 dc4 10.Nc4 Be7 11.Nf3 a6=; 6...a6 7.e3 Ngf6 8.Be2 Nb6 9.c4 dc4 10.Nc4 Nc4 11.Bc4 0-0=) 7.ba5 Ra5 8.c4 Ngf6 9.c5 Be7 10.Nh4 Bg4 11.h3 Bh5+=; B2) 6.e3 Ngf6 (6...a5 7.b5 Ngf6 8.c4 0-0 9.c5 Be7 10.Ngf3 Re8 11.Be2 Ng4=; 6...a6 7.Ngf3 Ngf6 8.c4 a5 9.c5 Be7 10.Be2 0-0 11.b5 Bg4=) 7.c4 c6 8.Ngf3 Ne4 9.Ne4 Be4 10.Nd2 Bf5 11.Be2 0-0=; B3) 6.c4 c6 (6...Ngf6 7.c5 Be7 8.Ngf3 0-0 9.e3 a5 10.b5 Ne4 11.Ne4 de4=; 6...a5 7.c5 Be7 8.b5 Ngf6 9.Ngf3 0-0 10.e3 b6 11.c6 Nb8=) 7.Ngf3 Ngf6 8.e3 Ne4 9.Be2 0-0 10.0-0 Qf6 11.Ne4 Be4=; C) 5...Be7 C1) 6.e3 Ngf6 (6...a5 7.b5 Ngf6 8.Ngf3 0-0 9.Be2 a4 10.0-0 Ne4 11.Ne4 Be4=; 6...Bd6 7.Ngf3 Ngf6 8.Be2 a5 9.ba5 Ra5 10.c4 0-0 11.c5 Be7=) 7.Ngf3 a5 8.ba5 Ra5 9.Be2 Nb6 10.Nh4 Be4 11.Ne4 Ne4+=; C2) 6.Ngf3 a5 (6...Bd6 7.e3 Ngf6 8.c4 a5 9.c5 Be7 10.Bb5 ab4 11.ab4 Ra1=; 6...Nh6 7.c4 0-0 8.e3 a5 9.b5 Bd6 10.c5 Be7 11.Be2 e5=) 7.ba5 Ra5 8.Nb3 Ra8 9.e3 Ngf6 10.Be2 0-0 11.0-0 Nb6+=; C3) 6.c4 a5 (6...Ngf6 7.e3 a5 8.b5 0-0 9.Ngf3 Nb6 10.c5 Nbd7 11.Be2 a4=; 6...Nh6 7.e3 0-0 8.Qb3 Nf6 9.Ngf3 a5 10.ba5 Qc8 11.Bc3 Rd8=) 7.ba5 Ngf6 8.Qb3 0-0 9.e3 Ra7 10.Ne2 Re8 11.Rc1 c5=; D) 5...a5 D1) 6.ba5 Ra5 (6...Ngf6 7.Bc3 Qc8 8.e3 Bd6 9.Bd3 Bd3 10.cd3 0-0 11.Bb4 Qd8=; 6...Be7 7.c4 Ngf6 8.Qb3 0-0 9.Rc1 c5 10.cd5 Qa5 11.de6 Be6+=) 7.Nb3 Ra7 8.e3 Ngf6 9.Nf3 Nb6 10.Nc5 Nc4 11.Bc4 dc4+=; D2) 6.b5 Ngf6 (6...Be7 7.e3 Nh6 8.Ngf3 0-0 9.Be2 Nb6 10.c4 dc4 11.Nc4 Nc4=; 6...Nb6 7.c4 Nc4 8.Nc4 dc4 9.f3 Bd6 10.g3 Qd7 11.e4 Qb5+=) 7.Ngf3 Nb6 8.Ra2 Bd6 9.c4 dc4 10.e3 c3 11.Bc3 Nbd5+=.

5.e3 A) 5...Ngf6 A1) 6.Nf3 a5 (6...Bd6 7.c4 dc4 8.Bc4 a5 9.b5 Nb6 10.Bd3 Bd3 11.Qd3 0-0=; 6...Be7 7.Be2 a5 8.b5 0-0 9.0-0 Nb6 10.Nc3 Bg4 11.Bd3 a4=) 7.b5 Nb6 8.Be2 Bd6 9.0-0 Ne4 10.Nc3 0-0 11.Ne4 Be4=; A2) 6.Be2 a5 (6...Bd6 7.Nf3 a5 8.b5 0-0 9.0-0 Ne4 10.c4 Qf6 11.Nc3 Nc3+=; 6...Ne4 7.Nf3 a5 8.b5 Bd6 9.0-0 Nb6 10.Nc3 Nc3 11.Bc3 0-0+=) 7.b5 Bd6 8.Nf3 0-0 9.0-0 Ne4 10.c4 Qf6 11.Nc3 Nc3+=; A3) 6.c4 a5 (6...Be7 7.Nf3 0-0 8.Nc3 a5 9.b5 Ne4 10.Bd3 Nc3 11.Bc3 dc4=; 6...Bd6 7.c5 Be7 8.Nf3 a5 9.b5 Ne4 10.Bd3 0-0 11.0-0 b6=) 7.b5 Be7 8.Nf3 0-0 9.Nc3 Re8 10.c5 Ne4 11.Ne4 Be4=; B) 5...Bd6 B1) 6.Nf3 a5 (6...Ngf6 7.c4 a5 8.c5 Be7 9.Be2 ab4 10.ab4 Ra1 11.Ba1 0-0=; 6...c6 7.c4 Ngf6 8.c5 Bc7 9.Be2 0-0 10.0-0 Ne4 11.Nbd2 Qf6=) 7.c4 ab4 8.c5 ba3 9.Ba3 Be7 10.Be2 Bb1 11.Qb1 b6+=; B2) 6.Be2 Ne7 (6...Ngf6 7.Nf3 a5 8.b5 0-0 9.0-0 Ne4 10.c4 Qf6 11.Nc3 Nc3+=; 6...a5 7.b5 Ngf6 8.Nf3 0-0 9.0-0 Ne4 10.c4 Qf6 11.Nc3 Nc3+=) 7.Nf3 0-0 8.0-0 a5 9.b5 c6 10.c4 dc4 11.bc6 Nc6+=; B3) 6.c4 c6 (6...Ngf6 7.Nf3 dc4 8.Bc4 0-0 9.0-0 c6 10.Nc3 Nd5 11.Bd3 Bd3=; 6...dc4 7.Bc4 a5 8.b5 Nb6 9.Be2 Nf6 10.Nf3 0-0 11.0-0 Nbd5=) 7.Nf3 Ngf6 8.c5 Bc7 9.Be2 0-0 10.0-0 Ne4 11.Nbd2 Nd2=; C) 5...Be7 C1) 6.Nf3 Nh6 (6...a5 7.b5 Ngf6 8.Be2 0-0 9.0-0 Ne4 10.c4 dc4 11.Bc4 Rc8=; 6...Ngf6 7.Be2 a5 8.b5 0-0 9.0-0 Ne4 10.c4 dc4 11.Bc4 Rc8=) 7.Be2 0-0 8.0-0 a5 9.b5 Nb6 10.Nbd2 Na4 11.Qc1 Bd6=; C2) 6.c4 a5 (6...Ngf6 7.Nf3 0-0 8.Qb3 Nb6 9.c5 Nbd7 10.Be2 a5 11.ba5 Ra7=; 6...Nb6 7.c5 Nd7 8.Nf3 a5 9.b5 Ngf6 10.Be2 Ne4 11.0-0 0-0=) 7.ba5 Ra5 8.Qb3 Qa8 9.Bc3 Bb1 10.Qb1 Ra3 11.Ra3 Qa3+=; C3) 6.Be2 Ngf6 (6...a5 7.b5 Ngf6 8.Nf3 0-0 9.0-0 Ne4 10.c4 dc4 11.Bc4 Rc8=; 6...Be4 7.Nf3 a5 8.b5 Nb6 9.Nbd2 Na4 10.Qc1 Bf5 11.0-0 Nf6=) 7.Nf3 0-0 8.0-0 a5 9.b5 Ne4 10.c4 dc4 11.Bc4 Rc8=; D) 5...a5 D1) 6.ba5 Ra5 (6...Ngf6 7.Ne2 Ra5 8.Ng3 Bg6 9.c4 Be7 10.Qb3 b6 11.Nc3 0-0+=; 6...Bd6 7.c4 Ngf6 8.c5 Be7 9.Qb3 Ra7 10.Nf3 Qa8 11.Nh4 Bg4=) 7.Bc3 Ra7 8.Ne2 Bd6 9.Ng3 Bg6 10.Bb5 Ngf6 11.0-0 0-0-/+; D2) 6.b5 Nb6 (6...Ngf6 7.Nf3 Nb6 8.Be2 Bd6 9.0-0 Ne4 10.Nc3 0-0 11.Ne4 Be4=; 6...Bd6 7.c4 Ngf6 8.c5 Be7 9.Nf3 Ne4 10.Bd3 Ndf6 11.0-0 b6= 0.25) 7.Nf3 Nf6 8.Be2 Bd6 9.0-0 Ne4 10.Nc3 Nc3 11.Bc3 0-0+=.

5.Nf3 a5 A) 6.ba5 Ngf6 (6...Ra5 7.e3 Bd6 8.c4 Ngf6 9.c5 Be7 10.Be2 0-0 11.0-0 Ne4=; 6...Be7 7.e3 Ngf6 8.c4 Ra5 9.Qb3 b6 10.Be2 0-0 11.0-0 Bd6+=) 7.e3 Ra5 8.c4 Be7 9.Qb3 dc4 10.Bc4 Nb6 11.Bb5 c6+=; B) 6.b5 Ngf6 (6...Be7 7.e3 Ngf6 8.Be2 0-0 9.0-0 Ne4 10.c4 dc4 11.Bc4 Rc8=; 6...Bd6 7.e3 Nb6 8.Be2 Nf6 9.0-0 Ne4 10.Nc3 0-0 11.Ne4 Be4=) 7.e3 Nb6 8.Be2 Bd6 9.0-0 Ne4 10.Nc3 0-0 11.Ne4 Be4=.

5.Nf3 Nb6 6.Nbd2 (6.e3 a5 (6...Nf6 7.Nbd2 a5 8.ba5 Ra5 9.c4 dc4 10.Nc4 Nc4 11.Bc4 Bd6=; 6...Bd6 7.Bb5 c6 8.Be2 Nf6 9.0-0 Ne4 10.Nc3 Nc3 11.Bc3 0-0+=) 7.ba5 Ra5 8.Bc3 Ra7 9.a4 Nf6 10.a5 Nbd7 11.Nbd2 Bd6+=) 6...Bd6 (6...Na4 7.Ra2 a5 8.e3 c6 9.Bd3 ab4 10.ab4 Bb4 11.Bf5 ef5+=; 6...a5 7.ba5 Ra5 8.Nb3 Ra7 9.e3 Nf6 10.Nc5 Nc4 11.Bc4 dc4+=) 7.e3 c6 (7...a5 8.c4 dc4 9.ba5 Ra5 10.e4 Bg6 11.d5 f6=) 8.c4 dc4 (8...Nc4 9.Nc4 dc4 10.Bc4 Nf6 11.0-0 0-0=) 9.Nc4 (9.d5 Nf6 10.dc6 bc6 11.Nc4 Nc4+=) 9...Nc4 10.Bc4 Be4 (10...Nf6 11.0-0 0-0=) 11.d5 e5? (11...Nf6 12.de6 fe6+/–) 12.dc6+- Bc6 13.Be5 Bf8 14.Qe2 Nh6 15.0-0 f6 16.Rfd1 Qc8 17.Bd6 Qg4 18.Bb5 Nf5 19.Bc6 bc6 20.h3 Qe4 21.Bf8 Rf8 22.Rac1 a6 23.Nd2 Qe6 24.Qc4 Qc4 25.Nc4 Rd8 26.Rd8 Kd8 27.Na5 Kd7 28.Rc6 (28.Nc6?! Rc8 29.Rc5 Ne3 30.Ne5 fe5 31.Rc8 Kc8 32.fe3 e4+-) 28...Ra8 29.Rc5 Nd6 30.Rd5 Ke6 31.Rd3 Rc8 32.Kf1 Rc2 33.Nb3 Ne4?? (33...Ke7+-) 34.Nd4 (34.Nd4 Ke7 35.Nc2+-) 1–0. Derbin,Alexey – Popov,Yury, Novokuznetsk RUS, City Ch, 2011.

5.Nf3 Bd6 A) 6.Nbd2 a5 (6...Ngf6 7.Nh4 Be4 8.e3 0-0 9.c4 dc4 10.Nc4 Be7 11.Nf3 a6=; 6...a6 7.e3 Ngf6 8.Be2 Nb6 9.c4 dc4 10.Nc4 Nc4 11.Bc4 0-0=) 7.ba5 Ra5 8.c4 Ngf6 9.c5 Be7 10.Nh4 Bg4 11.h3 Bh5+=; B) 6.Nc3 a5 (6...Ngf6 7.e3 a5 8.ba5 Ra5 9.Nh4 Bg4 10.f3 Bh5 11.Nb5 Be7-/+; 6...a6 7.e3 Ngf6 8.Be2 0-0 9.0-0 a5 10.ba5 Ra5 11.Nh4 Be4=) 7.ba5 Ra5 8.e3 Ngf6 9.Nh4 Bg4 10.f3 Bh5 11.Nb5 Be7-/+; C) 6.e3 a5 (6...Ngf6 7.c4 0-0 8.c5 Be7 9.Bd3 Ne4 10.0-0 Bg4 11.h3 Bf5=; 6...Qe7 7.Be2 Ngf6 8.0-0 a5 9.b5 Nb6 10.a4 Be4 11.Ne5 0-0=) 7.b5 Nb6 8.Be2 Nf6 9.0-0 Ne4 10.a4 Qe7 11.Ba3 Bb4=.

5.Nf3 Be7 6.e3 a5 (6...Ngf6 7.Be2 a5 8.b5 0-0 9.0-0 Ne4 10.c4 dc4 11.Bc4 Rc8=; 6...Bd6 7.c4 Ngf6 8.c5 Be7 9.Be2 a5 10.b5 0-0 11.0-0 Ne4=) 7.b5 Ngf6 8.Be2 0-0 9.0-0 Ne4 10.c4 dc4 11.Bc4 Rc8 =.

5.Nf3 Ngf6 A) 6.Nh4 Bg4 (6...Be4 7.Nd2 Be7 8.Nhf3 a5 9.b5 Bg6 10.e3 0-0 11.Be2 Nb6=; 6...Bg6 7.Ng6 hg6 8.e3 a5 9.b5 Bd6 10.h3 Nb6 11.Bd3 Qe7=) 7.h3 Bh5 8.Nd2 a5 9.b5 Ne4 10.Nhf3 Bd6 11.e3 Nb6+=; B) 6.Nbd2 a5 (6...Bd6 7.Nh4 Bg4 8.h3 Bh5 9.g4 Ne4 10.Ne4 de4 11.Ng2 Bg6=; 6...h6 7.c4 Bd6 8.c5 Be7 9.e3 a5 10.Be2 ab4 11.ab4 Ra1=) 7.b5 Nb6 8.Bc1 Bd6 9.Nh4 Ne4 10.Ndf3 Bg4 11.h3 Bf3-/+; C) 6.e3 a5 (6...Bd6 7.c4 a5 8.c5 Be7 9.Bb5 ab4 10.ab4 Ra1 11.Ba1 c6=; 6...Be7 7.Be2 0-0 8.0-0 a5 9.b5 Ne4 10.c4 dc4 11.Bc4 Rc8=) 7.b5 Nb6 8.Be2 Bd6 9.0-0 Ne4 10.a4 Qe7 11.Ba3 Bb4=.

4.a4 a5 5.b5 c5 (5...Nf6 6.Nf3=) 6.c4 (6.Nf3 e6=) 6...dc4 (6...e6 7.d4=) 7.Bc4 Nd7 (7...Nf6 8.Bf6 ef6 9.Nf3=) 8.Nf3 (8.Qf3!? e6 9.Qb7+=) 8...Nb6 (8...e6 9.0-0=) 9.Be2+= Nf6 10.0-0 g6 (10...e6!?=) 11.d4+- cd4 12.Nd4 (12.ed4?! Bg7=) 12...e6?? (better 12...Bg7+-) 13.Nf5+- ef5 (13...Nbd5 14.Nd4 Rc8+-) 14.Qd8 Rd8 1–0. GuestLTFJ – GuestWQKN, freechess.org, 2019.

4.a4 Qd6 5.b5 a5 (5...ab5 6.ab5 Ra1 7.Ba1=+) 6.Nf3= b6 (6...Nd7 7.Nh4 Be4 8.d3=) 7.c4 Nh6 (7...Nf6 8.Be5 Qc5 9.Nd4+=) 8.cd5 (8.Be5 Qc5+/-) 8...Qd5 9.Nc3 Qd7 10.Nd4 (10.d4 Qd8+/-) 10...Bg6+= 11.Qf3 Ra7 12.Nc6 Nc6 13.bc6 (13.Qc6?! e6+=) 13...Qf5?? (13...Qd8 14.Nb5 Ra8+-) 14.Qf5 Nf5 15.Nb5 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

4.a4 Nd7 5.Nf3 f6 (5...e6!?=) 6.Nd4+= Bg6 (6...Nh6 7.Nf5 Nf5 8.Qg4+=) 7.Ne6 Qc8 8.Be2 (8.Nc3 Kf7 9.Nf8 Qf8 10.Nd5 e6+-) 8...Bf7 (8...Kf7 9.Nf8 Qf8 10.0-0+=) 9.Bg4+- Nh6 10.Bh3 (10.Nf8?! Ng4 11.Qg4 Nf8=) 10...f5? (better 10...c6+-) 11.Ng7+- (11.Bg7?! Rg8 12.Bh6 Be6+-) 11...Kd8 12.Nf5 (better 12.Ne6 Be6 13.Bh8 Bf7+-) 12...Nf5?! (12...Rg8+-) 13.Bh8 (worse 13.Bf5 e5+-) 13...Bg7 (13...e6 14.Nc3 Nh4 15.e4 Bb4 16.ed5 ed5 17.Qg4+-) 14.Bg7 Ng7 15.Qf3 Be6 (15...Ke8 16.e4 c6 17.Qc3+-) 16.Be6 Ne6 17.Qd5 c6 (17...Nef8+-) 18.Qe6 1–0. DEFFM – gunawarman, freechess.org, 2018.

4.d4 Nc6 5.a3 e6 6.Bd3 Bd3 7.Qd3 Nf6 (7...Qg5 8.g3+=) 8.Nf3= h6 9.Nbd2 Bd6 10.c4 0-0 11.cd5 Nd5 12.0-0 e5 (better is 12...Qf6=) 13.de5+- Be7 14.Rfd1 f6? (14...Qd7 15.Nc4 Rfd8 16.e4+-) 15.ef6 (better is 15.Ne4 f5 16.Ng3 (16.Qd5?! Qd5 17.Rd5 fe4+-) 16...Ncb4 17.ab4+-) 15...Bf6 16.Bf6 Rf6?? (better is 16...Nf6 17.Qc4 Rf7+/–) 17.Ne4 Rf5 18.Ng3 Ne5 19.Ne5 Re5 20.e4 Qf6 21.ed5 Rd8 22.Qc4 Kh8 23.Rac1 Rf8 24.f3 c6 25.dc6 bc6 26.Qc6 Re6 27.Qc3 Qg5 28.Re1 Rg6 29.Qe3 Qf6 30.Qe5 Qh4 31.Qe7 Rff6 32.Re4 Qg5 33.Rce1 h5 34.Re5 Qd2 35.Rh5 Rh6 36.Rh6 Qh6 37.Qe8 Kh7 38.Qh5 1–0. Fournier,Frederic – Locrian, Partie evaluee, 2008.

4.d4 Qd6 5.a3 Nf6 6.c4 e6 7.c5 Qc6 8.Nc3 Qd7 9.Nf3 b6 10.Ne5 Qc8 11.Rc1 b5 12.Bd3 Bd3 13.Qd3 Qb7 14.0-0 Ne4 15.Ne4 de4 16.Qc2 f6 17.c6 Qc8 18.Nd7 Nd7 19.cd7 Qd7 20.Qe4 c6? (better is 20...Rd8+=) 21.Rc6+- Ra7 22.Re6 Be7 23.Rc1 0-0 24.Qc6 Rd8 25.e4 Bd6 26.d5 Bf4 27.Qd7 Rad7 28.Rcc6 Rc7 29.Rc7 Bc7 30.Ra6 Kf7 31.Rc6 Bb8 (31...Be5 32.Be5 fe5 33.Rc5+-) 32.Kf1 (better is 32.Rb6 f5 33.Rb7 Ke8 34.ef5 Bd6+-) 32...Re8 33.f3 Bh2 34.Ke2 f5 35.Kd3 (35...Be5 36.Be5 Re5 37.Kd4+-) 1–0. Loulou – mummy10, HCL–B1736 playchess.de, 2003.

4.Nf3 Nd7 5.c4 (5.Nh4 Be4=) 5...dc4 6.Bc4 e6 (6...Nb6 7.Be2=) 7.a3= Nb6 (7...b5 8.Be2=) 8.Qb3 (8.Be2 a5=) 8...Nf6 (8...Nc4 9.Qc4 Bd3 10.Qb3=+) 9.Nd4 (9.d3!?=) 9...Be4 10.f3 Bd5 (10...Bg6 11.d3=+) 11.Bd5= Nfd5 12.Nc3 (12.0-0 c5 13.Ne2 cb4=) 12...Be7 (12...Nc3 13.Qc3 Rc8 14.0-0=+) 13.Nd5 Nd5 (13...Qd5 14.Qd5 Nd5 15.Ne2=) 14.Ne2 (14.0-0 0-0=) 14...Bf6 15.Bf6 Qf6 16.Rc1 c6 17.e4 Ne7 18.Qe3 Qh4 19.g3 Qf6 20.0-0 0-0 21.Qb6 Rab8 22.Qc7 Ng6 23.d4 Qg5 (24.Rf2 Rfc8=). HMBCHESS2 – lowbrow, Live Game Caissa's Web, 2005.

4.Nf3 f6 5.c4 e6 (5...e5 6.cd5 Qd5 7.a3=) 6.Nd4+= Nc6 (6...Nh6 7.Nc3 c6 8.cd5 cd5 9.Be2=) 7.Nf5 ef5 8.a3 Qd7 9.cd5 Qd5 10.Nc3 Qd7 11.b5 Ne5 (11...ab5 12.Bb5 Bd6 13.d4+-) 12.d4 Ng6 13.ba6 ba6 14.Bd3 Bd6 (14...f4 15.Qf3 Ra7 16.0-0+-) 15.Qf3+- c6 16.Bf5 Qc7 17.Ne4 N8e7 18.Nd6 Qd6 19.Be4 0-0 (19...f5 20.Bc2+- (20.Bf5?! 0-0 21.g4 Nh4+=)) 20.0-0 Nd5 21.Rfc1 Nge7 22.a4 Rfc8 23.Ba3 Qe6 24.Be7 Ne7 25.Rc5 a5 26.Rac1 Ra6 27.Bd3 Rb6 28.Bc4 Nd5 29.Bd5 cd5 30.Rc8 Kf7 31.Qh5 Ke7 32.Qe8 (32...Kd6 33.R1c6 Rc6 34.Rc6) 1–0. Eralos – Cmurillo, ChessWorld.net, 2003.

4.Nf3 h6 5.a4 (5.b5 e6=) 5...c6 (5...e6 6.Be2=) 6.Na3 f6 (6...Nf6 7.Rb1=) 7.c4 (7.Nd4 Be4+/–) 7...Bg4 (7...e5 8.Nh4 Be4 9.Qh5 Kd7 10.f3+=) 8.Be2 (8.Bd3 e5 9.Bg6 Ke7+=) 8...Bh5 (8...e5 9.Bc3=) 9.Nh4 Bf7 (9...Be2!? 10.Qe2 h5+/–) 10.Bh5 g5 11.Ng6 (11.Bf7 Kf7 12.Qh5 Ke6+-) 11...Bg6 12.Bg6 Kd7 13.c5 e6 14.0-0 (better is 14.d4+/–) 14...Ne7? (better is 14...a5 15.Qb3 Na6+/–) 15.Bf6+- Rg8 16.Bh5 Qc7? 17.Qg4 Bg7 18.Bf7 Bf6 19.Qe6 Kd8 20.Qf6 Rf8 21.Qg7 Nd7 22.Be6 Nf5? 23.Bf5 Rf5 24.Nc2 Qe5 25.Qe5 Ne5 26.f4 gf4 27.ef4 Nd3 28.g3 Kd7 29.Rf3 Nb2? 30.Nd4 Rf6 31.Ra2 Nc4 32.d3 Re8 33.Kf2 Nd6 34.cd6 Kd6 35.Re2 Rg8 36.Rfe3 Kc7 37.Re7 Kc8 38.Rh7 b6 39.Ree7 c5 40.bc5 b5 41.ab5 ab5 42.Rc7 (42…Kd8 43.Ra7 Ra6 44.Ra6 Rg7 45.Rg7 b4 46.Ra8#) 1–0. algernon (2100) – bienopia (2100), net–chess.com, 2004.

5.Nf3 Nd7 6.Be2 Ngf6 7.0-0 (7.b5 Qc7=) 7...e5 8.Ne5 Ne5 (8...Bb4 9.Nf3=) 9.Be5 Bb4 10.Nc3 0-0 11.Rb1 a5 12.Na2 Bd6 (12...Nd7 13.Nb4 Ne5 14.Nd3 Nd3 15.Bd3 Bd3 16.cd3=) 13.Ba1 (13.Bd6 Qd6 14.Rb7 Rfb8+=) 13...Be6 (13...Ne4!?=+) 14.Rb7+= d4 (14...Re8 15.f4+=) 15.Nc1 Qc8 (15...de3 16.de3 Qc8 17.Qd6 Qb7 18.Bf6 gf6 19.Qg3 Kh8 20.Qh4+=) 16.Rb1+- de3 17.fe3 Ne4 18.Bd3 Nc5 19.Bh7 (19.Qh5 f5+-) 19...Kh7 20.Qh5 Kg8 21.Bg7 Kg7 22.Qg5 Kh8 23.Rf6 Ne4 (23...Bf5 24.Rf5 Qf5 25.Qf5 Rfd8+-) 24.Rh6 1–0. GuestDYSK – alekbb, freechess.org, 2019.

5.Nf3 f6 6.c4 e5 7.Qb3 Be7 8.Nc3 Bg4 (8...Be6!?=) 9.cd5+/- Bf3 10.gf3 Bd6 (10...Qd6 11.Ba3+/-) 11.Rg1 g6 12.Ne4 Ne7 (better 12...Qe7+/-) 13.dc6 Nbc6 14.b5 Na5 (14...ab5 15.ab5 Ra1 16.Ba1 Na5+-) 15.Qe6 Qd7 (15...Bb4 16.Bc3 Bc3 17.dc3 Qc7+-) 16.Nf6 (16.Nf6 Kf8 17.Nd7 Ke8 18.Qd6 ab5 19.Qe5+-) 1-0. Pereira – Ciufe, internet, 2021.

5.b5 ab5 6.ab5 Na7 7.Nf3 b6 8.Be2 Qd7 9.0-0 e6 10.Nh4 Bg6 11.c4 Ne7 12.Nc3 dc4 13.Ng6 hg6 14.Bc4 Nf5 15.Qf3 Qd8 16.Ra6 Bd6 17.Rfa1 Bh2 18.Kf1 Be5 19.Ra7 Rh1 20.Ke2 Ra1 21.Ra1 Ra1 22.Ba1 Nd6 23.Bb3 Bf6 24.d4 Qd7 25.Qa8 Ke7 26.Bb2 Nb5 27.Ba4 Nc3 28.Bc3 Qd8 29.Bb4 c5 30.Qb7 Kf8 31.dc5 bc5 32.Bc5 Kg8 33.Bc6 Qa5 34.Qa8 Qa8 35.Ba8 g5 36.g4 g6 37.Bc6 Be5 38.Be7 f6 39.Be8 Kg7 40.Kd3 f5 41.gf5 gf5 42.Bg5 Kf8 43.Bg6 Bb2 44.e4 fe4 45.Ke4 Bg7 46.f4 Bb2 47.Bh5 Kg7 48.Bd1 Kg6 49.Bd8 Kf7 50.Bh5 Kg8 51.Bg5 Kg7 52.Kd3 Ba1 53.Kc4 Kg8 54.Kc5 e5 55.f5 e4 56.f6 Kh7 57.Kd5 Bf6 58.Bf6 Kh6 59.Be2 e3 60.Ke6 Kg6 61.Bf3 e2 62.Be2 Kh7 63.Kf7 Kh6 64.Be7 Kh7 65.Bf8 1–0. onur604 (2320) – Football_Coach_NSK (2120), lichess.org, 2020.

5.b5 ab5 6.Bb5 Qd6 (6...Nf6 7.Nf3=) 7.Nf3 Nf6 8.0-0 e5? (better 8...Bg4=) 9.Be5+- Qc5 10.Bc7 Bc2 (10...Bd6 11.d4 Qb4 12.c3+-) 11.Qe2 Bb1? (better 11...Bf5+-) 12.Rab1 Be7 (12...Rc8 13.Rfc1 Qa3 14.Be5+- (14.Bc6?! bc6 15.Be5 Qa4+-)) 13.Rfc1 Qa7 14.Rc6 (14.Bb6 Qb6 15.Bc6 Qc6 16.Rc6 bc6+-) 14...bc6 15.Bc6 Nd7 (15...Kf8 16.Ba8 Qc7+-) 16.Rb7 Qa6 (16...Qb7 17.Bb7 Ra4+-) 17.Qa6 Ra6 18.Rb8 Bd8 19.Rd8 (19.Bd8?? Rc6 20.Rb1 Kd8-+) 19...Ke7 20.Rd7 Ke6 21.Nd4 Kf6 22.Rd6 Kg5 23.h4! Kh4 (23...Kh5 24.Rd5 f5 25.Rf5 Kg6 26.h5 Kh6 27.Bf4 g5 28.Rg5 Rf8 29.Rf5 Kg7 30.Ne6 Kg8 31.Rf8) 24.Rd5 Rc6 (24...g5 25.Rd6 f6 26.Rf6 Rc6 27.Nf5 Kh5 28.Ng7 Kh4 29.Bg3 Kg4 30.f3 Kg3 31.Nf5) 25.Nf3 Kg4 26.Rg5 1–0. DEFFM – GuestQPVX, freechess.org, 2018.

7.Ba1 Na5 8.Nf3 f6 9.Nd4 e6 (9...Bc8 10.Bc3 Nc4 11.Bc4 dc4 12.f4+=) 10.Nf5 ef5 11.Bd3 Nh6 12.Bc3 c6 13.bc6 bc6 14.Ba5 (14.Qh5 g6 15.Qh4 Ng8+/–) 14...Qa5+= 15.0-0 Bc5 (15...g6!?+=) 16.Qh5+/– Nf7 17.Qf5 (worse is 17.Bf5 g6 18.Qh4 gf5 19.Qf6 Qc7+=) 17...g6? (17...Ke7!?+/–) 18.Qf6 (better is 18.Qe6 Kf8 19.Qc6+-) 18...Rf8?? (better is 18...Qc7+-) 19.Qc6 Ke7 20.Qd5 (20.Nc3 Bd6+-) 20...Nd6 21.Nc3 Rf5 (21...Bb4 22.Nb5 Nb5 23.Bb5 Bd6+-) 22.Bf5 Nf5 23.Ne4 Qc7 (23...Bb4 24.Qb7 Ke6 25.Ng5 Kf6+-) 24.Qc5 Qc5 25.Nc5 Kd6 26.Nd3 Kd5 (26...Ne7 27.f4+-) 27.Rc1 Kc4 28.Ne5 Kd5 29.f4 Ke4 30.c4 Ne3 31.de3 g5 32.fg5 Ke5 33.c5 1–0. Valpa – Djpnola, playchess.de, 2005.

7.Ba1 Nb4 8.d3 e6 9.Nf3 Bc5?? 10.Bg7+- Ne7 11.Bh8 Ng6 12.Bc3 Na2 13.Bb2 Bb4 (13...Qd7+-) 14.c3 Ba5 15.Qa4 b6 (15...Nc3 16.Nc3 b6 17.Be2+-) 16.Qa2 Qd6 (16...e5 17.Be2+-) 17.Ba3 (17.Nd4 Bg4+-) 17...Qd7 18.Bb4 (better 18.Nd4 Bg4+-) 18...Ne5 (18...Bb4 19.cb4 Qb5 20.Qa8 Ke7+-) 19.Ne5 Qd8 20.Ba5 ba5 21.Qa5 Qe7 22.Qa8 (better 22.g4!? Bg6 23.Nc6 Qf6 24.Qc7 Kf8+-) 22...Qd8 23.Qd8 Kd8 24.Nf7 Ke7 25.Ne5 Kd6 26.Nf3 (26.f4 Bg6+-) 26...Kc5 27.Na3 c6 28.bc6 Kc6 29.Be2 h5 30.0-0 (better 30.Nd4 Kc5+-) 30...Kd6 31.d4 Be4 32.Nb5 Ke7 33.Ng5 Kf6 34.Ne4 de4 35.Bh5 e5 36.de5 Ke5 37.c4 (37.c4 Kf6 38.c5 Kg5 39.g4 Kf6 40.c6 Ke6 41.c7 Kd7 42.Rc1 Ke6 43.c8Q Kf6 44.Qf8 Kg5 45.Qe7 Kh6 46.Rc6) 1-0. Delaza62 (1670) – elcarpintero, Rated Classical game, lichess.org, 2013.

7.Ba1 Nb8 8.Be2 e6 9.Nf3 h6 10.0-0 Nf6 11.c4 c6 (11...dc4!? 12.Bc4 Nbd7=) 12.Nd4+- Bg6 13.bc6 bc6 14.Qa4 Qc7 (14...dc4 15.Na3 Ba3 16.Qa3+-) 15.cd5 Nd5 16.Rc1 Bb1?? (better 16...Bb4+-) 17.Nc6+- (17.Rb1?! Bd6 18.e4 Nb6+-) 17...Nc6 (17...Qd7 18.Qa8 Bd6 19.Bg7 Nb6 20.Nb8 Na8 21.Nd7 Kd7 22.Bh8 Bg6+-) 18.Rc6 Kd8 (18...Qd7 19.Bb5 Ke7+-) 19.Qa8 Kd7 (19...Ke7 20.Rc7 Nc7 21.Qc6 e5 22.Qc7 Ke6 23.Qe5 Kd7 24.Bb5 Kc8 25.Qe8 Kb7 26.Qc6 Kb8 27.Be5 Bd6 28.Bd6 Ka7 29.Qa6) 20.Bb5 Nb6 (20...Ba3 21.Rc7 Kc7 22.Qc6 Kb8 23.Ba6 Ne3 24.Qb7) 21.Rb6 Ke7 (21...Qc6 22.Qc6 Kd8 23.Qd7) 22.Qe8 1–0. DEFFM – guestbcci, freechess.org, 2019.

7.Ba1 Ne5?? 8.Be5+- 1–0. GuestSWXB – GuestSDCZ, freechess.org, 2019.

5.b5 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 (8.bc6 Nc6 9.Nf3 Qa5=) 8...cb5 (8...Nf6 9.Nf3=+) 9.cb5 (9.cd5!? Qd5 10.Nc3+=) 9...Nf6=+ 10.Nf3 h6 (10...Bd6 11.Be2=+) 11.Nc3 (11.Be2 Bd6=) 11...Ne4 (11...Bd6 12.Be2=) 12.Be2 (12.d3 Nc5 13.Be2 Bd6=) 12...Qb6 (12...Bb4 13.0-0=) 13.0-0 (13.Ne4 Be4 14.Bd4 Qc7+=) 13...Nd6 (13...Nd7 14.Nd4 Bg6 15.f4+=) 14.d3 Nd7 (14...Nb5? 15.Qb3 Bc5 16.Nb5+-) 15.d4 (15.Nd4 Bg6+=) 15...Nf6 (15...Be7 16.Na4 Qd8 17.Qb3=) 16.Qa4 (16.Na4 Qd8=) 16...Be7 17.Qa8 Bd8 (17...Qd8 18.Qa7=) 18.Na4 (18.Rc1 0-0=) 18...Qc7 (18...Qa5 19.Qa5 Ba5 20.Bc3 Bc3 21.Nc3=+) 19.Nc5 0-0 20.Bb2 (20.Rc1 Qb6=) 20...Nd7 (20...b6 21.Na4 Qc2-/+) 21.Rc1 (21.Nd7 Qd7 22.Ne5 Qe8+=) 21...Nc5= 22.Rc5 (22.dc5 Bf6 23.b6 A) 23...Bb2? 24.Qf8 (24.bc7?! Ra8 25.cd6 e5+-) 24...Kf8 25.bc7+-; B) 23...Qd7+=) 22...Qb6 (22...Qa5 23.Qa5 Ba5 24.Ne5=) 23.Ne5 Bf6?? (better 23...Be7 24.Qa4 Qd8=) 24.Qa4 (better 24.Qf8! Kf8 25.Nd7 Ke8 26.Nb6+-) 24...Be5-/+ 25.de5 Ne4?? (better 25...Qc5 26.ed6 Rd8-+) 26.Rc1+= Nc5 (26...Qd8 27.f3 Ng5 28.Qa7+-) 27.Qd4 (better 27.Qa3 Nd7 28.Bd4+-) 27...Rc8?? (better 27...Nd7+-) 28.Ba3+- Qd8 (28...Qa5 29.Rc5 (29.Bc5?! b6+-) 29...Qe1 30.Bf1 Rc5 31.Bc5+-) 29.Rc5 Rc5 (29...Ra8 30.Bb4+-) 30.Qc5 b6 31.Qd6 Qa8 32.h3 (32.Bf1 Qa4 33.Bb2 Qb3+-) 32...Qa5 (32...Kh7 33.Qb4+-) 33.Qb4 (33.Bh5!? Qa8+-) 33...Qa8 34.g4 Bg6 35.h4 (35.Bf1 Kh7+-) 35...Qc8 36.h5 Bc2 37.Kg2 g6 (37...Qa8 38.Qd6+-) 38.hg6 (38.Qd6 Qa8+-) 38...Bg6 39.Qf4 (39.Kf1 Qc2+-) 39...Qa8 (39...Be4 40.Bf3 Bf3 41.Kf3+-) 40.Bb4 (40.Bd6 Kg7+-) 40...d4 (40...Be4 41.Bf3 Bf3 42.Kf3+-) 41.Bf3 Qa4 42.Bd6 (42.Qd4 Kh7 43.Bc6 Qa7+-) 42...Kh7 (42...Qb5 43.ed4 Qa4+-) 43.Bf8 (43.Bf8 Qb5 44.Qh6 Kg8 45.Qg7) 1–0. GuestQNYB – GuestHGWW, freechess.org, 2016.

5.b5 Nd7 6.d4 (6.ba6 ba6 7.Nf3 Ngf6=) 6...ab5=+ 7.ab5 Ngf6 (7...Ra1 8.Ba1 Ngf6 9.Nf3=+) 8.Nd2 (8.Nf3 Ra1 9.Ba1 Qa8=+) 8...Bb4 (8...Ra1 9.Ba1 Qa8 10.Bb2-/+) 9.Ra8 Bd2 (9...Qa8 10.c3 Bd6 11.c4=+) 10.Qd2 Qa8 11.Qb4 (11.f3!?=) 11...Bc2 12.Ba3 Qd8 13.Nf3 b6 (13...Bf5 14.Be2=+) 14.Be2= c5?? (better 14...Be4=) 15.bc6+- Nb8 16.Bb5 Nc6 (16...Qc7 17.Ne5 Kd8 18.Qd6 Qd6 19.Bd6 Nc6 20.Nc6 Kd7 21.Ne5 Kd6 22.Nf7 Ke7 23.Nh8 Ne4+-) 17.Bc6 Nd7 18.Ne5 (18.Ne5 f6 19.Qd6 fe5 20.Qe6 Qe7 21.Qe7) 1–0. Anonymous – Anonymous, lichess.org, 2020.

5.b5 Nf6 6.Nf3 Bc5 7.c4 Nbd7 (7...dc4 8.Bc4 0-0 9.0-0=) 8.d4 Bb4 (8...Be7 9.ba6 ba6 10.cd5 ed5 11.Bd3 Bd3 12.Qd3=) 9.Nbd2 (9.Bc3 Bc3 10.Nc3 ab5 11.ab5 0-0=) 9...0-0 (9...ab5 10.ab5 Ra1 11.Ba1=+) 10.cd5 (10.ba6 ba6 11.Ba3 c5=) 10...ed5 (10...Nd5 11.ba6 ba6 12.Ba3=+) 11.Be2 (11.ba6 ba6 12.Ba3 Ba3 13.Ra3 c5=) 11...Re8 (11...ab5 12.ab5 Ra1 13.Ba1=+) 12.0-0 (12.ba6 ba6 (worse 12...Ra6 13.Ba6 ba6 14.Ba3+-) 13.Ba3 Qe7 14.Bb4 Qb4=) 12...c6 (12...ab5 13.ab5 Qe7 14.Qb3=+) 13.Qb3 (13.Qb3 Qa5 14.Qd1=). GuestGGCR – GuestVDSM, freechess.org, 2016.

5.c4 c6 6.Nf3 h6 7.b5 ab5 8.ab5 Ra1 9.Ba1 cb5 10.cb5 (10.cd5!? Qd5 11.Nc3+=) 10...b6 11.Be2 Nf6 12.0-0 Nbd7 13.Nc3 Bc5 14.Na4 0-0 15.Nd4 Bd4 16.Bd4 e5 17.Bb2 Nc5 (17...Qc7 18.d4 Bc2 19.Qc1=) 18.d4 (18.Be5 Ncd7 19.Bd4 Qb8+/-) 18...ed4 (18...Na4!? 19.Qa4 e4+=) 19.Bd4+/- Na4 20.Qa4 Ne4 21.Qa7 Nc5 (21...Qb8!? 22.Qb8 Rb8+/-) 22.Bc5+- bc5 23.Qc5 Be4 24.f3 Bf5 25.Rd1 Bc8 (25...Be6+-) 26.Qd5 Qb6 27.Qd4 Qa5 28.Ra1 Qc7 29.b6 Qc2? (29...Qc6+-) 30.Bd3 Qd2 (30...Qc6 31.Be4 Qb5+-) 31.Bh7! Kh7 32.Qd2 Bb7 33.e4 (33.Ra7 Ba8+-) 33...f5 34.Qd7 Bc8 35.Qe7 Rg8 36.b7 Bb7 37.Qb7 fe4 38.Qe4 Kh8 39.Ra8 (39.Ra7 Rd8 40.Qg4 Rd1 41.Kf2 Rd2 42.Kg3 Rg2 43.Kg2 Kh7 44.Qg7) 39...Ra8 40.Qa8 Kh7 41.h3 (41.h3 h5 42.Qe4 Kg8 43.Qe8 Kh7 44.Qh5 Kg8 45.Qf5 Kh8 46.g4 g5 47.Qg5 Kh7 48.f4 Kh8 49.f5 Kh7 50.f6 Kh8 51.Qg7) 1-0. BeepBeepImAJeep - djoenan (1660), lichess.org, 2017.

5.Nf3 f6 6.b5= a5 (6...e5!?=) 7.Nh4 Ne7 8.Nf5 Nf5 9.Qh5 (9.Bd3 Qd7+=) 9...g6= 10.Qh3 Qd6 (10...Nd7 11.Bd3=) 11.g4 (better 11.Bf6 Bg7 12.Bg7 Ng7 13.Be2+-) 11...Ne7?? (better 11...Ng7+=) 12.Bf6+- Rg8 13.Qh7 Nd7 (13...Qb6+-) 14.Be7 Rg7 (14...Qe5 15.d4 Qg7 16.Qg7 Bg7 17.Bg5+-) 15.Qg7 Bg7 16.Bd6 cd6 (16...Ba1 17.Bc7 Rc8 18.b6+-) 17.Ra2 1–0. DEFFM – GuestBLDM, freechess.org, 2018.

5.Nf3 Nf6 6.b5 Be7 7.Be2 0-0 8.Nh4 Be4 9.d3 Bg6 10.0-0 c6 11.Nd2 (11.c4 Qc7=) 11...cb5 (11...ab5 12.ab5 Ra1 13.Ba1 cb5 14.e4=) 12.ab5 Nbd7 13.ba6 Ra6 14.Ng6 fg6 15.c4 Nc5 16.Ra6 Na6 17.d4 Qb6 18.Qc2 Nb4 19.Qb3 dc4 (19...Qc7!?+/-) 20.Bc4+- (20.Qc4?! Nbd5 21.Rb1 Qd8+=) 20...Qa5 (20...Kf7 21.Nf3 Nd7 22.Bc3+-) 21.Be6 Kh8 22.e4 Nc6 23.Bc3 Qc7 24.e5 Nd7 25.Rb1 Rb8 26.Bd7 Qd7 27.d5 Na7 28.e6 Qd6 (28...Qc7 29.Qc4 Qd8 30.Ne4+-) 29.Ne4 Qf4 30.Qa4 Qe4 (30...Rg8 31.d6 Bh4+-) 31.Qe4 (31.Qe4 Rg8 32.Rb7+-) 1-0. DEFFM – GuestXGXM, freechess.org, 2021.

5.Nf3 h6 6.Nd4 Bg6 7.b5 (7.Bd3 Bd3 8.cd3 Bb4=+) 7...ab5=+ 8.ab5 Nd7 (8...Ra1 9.Ba1 Nf6 10.f4=+) 9.Ra8 Qa8 10.Be2 e5 11.Nf3 Bd6 12.0-0 Ngf6 13.d4 e4 (13...Qa2 14.Qc1 ed4 15.Nd4=) 14.Ne5 Nb6 15.Ng6 fg6 16.Nd2 0-0 (16...Qa4 17.Qc1+=) 17.c4+= dc4 (17...Qa2 18.Qc2 Na4 19.Rb1+=) 18.Nc4 Nc4 19.Bc4 Kh7 20.Qb3 Qc8 (20...Qe8 21.h3+-) 21.Be6+- White intends d5 21...Qd8 22.d5 Qe7 23.h3 Nh5 (23...Nd7 24.Bd4+-) 24.Bd4 White plans b6 (24.b6+-) 24...Qh4 (better 24...Bc5!? 25.Ba1 Qg5+-) 25.b6+- Ng3?? (25...Qd8+-) 26.fg3 Qg3 27.Rf8 Qh2 28.Kf1 (28.Kf1 Bf8 29.bc7 Qc7 30.Qb1+-) 1–0. DEFFM – rakmane, freechess.org, 2019.

5.Bc4 b5?? 6.Bf7 Kf7 7.Qf3 e6 (better is 7...Nf6!? 8.Bf6 ef6 9.Qa8 Bb4+=) 8.Qa8+- Bb4 9.Qf3 (better is 9.e4!? Bg4 10.a4+-) 9...Nf6+/– 10.Bf6?? (better is 10.Bc3 Be7 11.a4+/–) 10...Qf6-+ 11.Nh3? (better is 11.Nc3 Bc3 12.Rd1-+) 11...Qa1 12.0-0 Rf8 (better is 12...Qf6 13.e4 Bh3 14.Qh3 Bd6-+) 13.e4-/+ Kg8 (13...Qa2!? 14.ef5 ef5 (14...Bd2 15.fe6 Ke7 16.Qe2+/–) 15.Qf5 Kg8-/+) 14.ef5+= Qa2 15.Qb7? (better is 15.Qe4 Be7 16.fe6+=) 15...ef5 16.Qc7 Bd2 17.Rd1 (17.Nd2 Qd2 18.Qe5 Qd7-+) 17...Qb3 18.Rf1 Bb4 19.Nf4 Qf7 (better is 19...Qc4 20.Qc4 bc4-+) 20.Rc1?? (20.Qb6-+) 20...Qc7 21.Rc7 Bd6 22.Ne6 (22.Rg7 Kg7 23.Ne6 Kf6 24.Nf8 Bf8-+) 22...Bc7 (22...Bc7 23.Nf8 Kf8-+) 0–1. Trkn – prezes, itsyourturn.com, 2000.

5.Bc4 Nf6 6.Nf3 (6.Bf6 ef6 7.Qf3 Qc8=) 6...b5 (6...e6 7.a3=) 7.Be2 Nc6 8.a3 e6 (8...Qd6 9.d4=) 9.0-0 (9.Nh4 Bb1 10.Qb1 Na7+=) 9...Bd6 10.Nd4 (10.Qc1 Qd7+=) 10...Nd4= 11.Bd4 0-0 12.d3 (12.Bf3 Rc8=) 12...e5=+ 13.Bb2 e4 (13...Re8 14.Qc2=+) 14.de4 (14.Bd4 Re8 15.Nc3 ed3=+) 14...Be4 (14...Ne4 15.Bf3 Re8 16.Nc3=) 15.Nd2= Bb7 (15...Re8 16.Ne4 Ne4 17.Bd3=) 16.Bf3 (16.Qc2 Rc8=) 16...Bf3 17.Nf3 (17.Qf3 Bh2 18.Kh2 Qd2+=) 17...Ne4 (17...Qe7 18.Bf6 Qf6 19.Qd4=) 18.Qc2 (18.Qd4 Nf6+=) 18...f5 (18...Re8 19.Rad1+=) 19.Qb3 (19.Rfd1 Qe7+=) 19...Kh8= 20.Rad1 (20.Rfd1 Qe7=) 20...Ng5 (20...Qe7 21.Nd4=) 21.Nd4+= Qf6? (21...Qe8 22.Qc2 Qh5 23.h3=) 22.Nb5 (22.f4!? Qh6 23.Qd5+- (23.fg5?! Qh2 24.Kf2 Qg3 25.Ke2 Qg2 26.Rf2 Qg4 27.Kd2 Rad8+-)) 22...Bh2 23.Kh2 Qh6 24.Kg1 ab5 (24...Nf3 25.gf3 Qg6 26.Kh1 Qh5 27.Kg2 Qg6 28.Kh2 Qh5 29.Kg1 Qg6 30.Kh2 Qh5 31.Kg1 Qg6=) 25.Rd7 Ne6 (better 25...Nf3! 26.gf3 Qg6 27.Kh2 Qh5 28.Kg2 Qg6 29.Kh3 Qh5 30.Kg3 Qg5 31.Kh2 Qh5 32.Kg1 Qg6 33.Kh1 Qh5 34.Kg1 Qg6=) 26.Re7 (26.Qd5 Rad8 27.Rd8 Rd8 28.Qb5 f4 29.ef4 Qf4+-) 26...Rae8 (26...Ra6!?+-) 27.Re6?? (better 27.Qe6! Qe6 28.Bg7 Kg8 29.Re6 Re6 30.Bf8 Kf8 31.Rd1+-) 27…Re6-+ 0–1. GuestCPYG – carlogtz, freechess.org, 2016.

6.a3 e5= 7.Nf3 (7.Qb3 Qe7 8.Ne2 Rd8 9.0-0 Qd7 10.Rc1 Nf6 11.Ng3) 7...e4 8.Qc2 Nh6 9.Nd4 Nd4 10.Bd4 Qg5 11.0-0.

6.a3 e6 7.d4 Nf6 8.Nf3 Bd6 9.0-0 0-0 10.Nc3 Qd7 11.Nh4.

6.a3 e6 7.Nf3 Nf6 8.0-0 Bd6 9.Nc3 0-0 10.d4 Qe7 11.Qe2.

6.a3 e6 7.Nf3 Nf6 8.0-0 Bd6 9.d4 Qe7 10.Nc3 e5 (10...0-0!?=) 11.Nd5+- Nd5 12.Bd5 Bd7 (12...e4 13.Ne5 Ne5 14.de5 Be5 15.Be5 Qe5 16.Bb7 Ra7 17.Bc6 Ke7+-) 13.Bc6 (13.de5 Ne5 14.Bb7 Rd8 15.Ne5 Be5 16.Be5 Qe5 17.Ba6 0-0+-) 13...Bc6 14.de5 (14.Ne5?! Be5 15.de5 Qg5+=) 14...Bb4? (better 14...Bf3 15.Qf3 Be5 16.Be5 Qe5 17.Qb7 0-0+-) 15.ab4 Qb4 16.Bd4 0-0-0 (16...0-0 17.Rc1 Rfc8 18.Nh4+-) 17.Qc2 Bf3 (17...Qb5 18.e4 a5 19.Rfb1+-) 18.Qf5 (worse 18.gf3 Qe7+-) 18...Kb8 19.Qf3 (worse 19.gf3 Qc4+-) 19...Qe7 (19...Qb3+-) 20.Rfb1 b6 (20...c6 21.Qc6 Rd4 22.ed4 Rc8+-) 21.Ra6 Kc8 (21...Rd5 22.Qd5 c6 23.Rab6 Kc8 24.Rb8 Kc7 25.R1b7) 22.Qc6 Rd4 (22...Qa3 23.Ra3 Rd4 24.Ra8) 23.Ra8 1–0. Vendelo – Marcie, internet free game, 2018.

6.a3 e6 7.h3 h6 (7...Nf6 8.Nf3=) 8.Ne2 (8.Nf3 Nf6=) 8...Nf6 (8...b5 9.Bb3=+) 9.Ng3 Bg6 10.0-0 Nh5?? (better 10...Be7=) 11.Nh5+- Bh5 (11...e5 12.d3+-) 12.Qh5 g6 (12...Qg5 13.Qg5 hg5 14.Rc1+-) 13.Qe2 (13.Bh8 gh5 14.d4 Bd6=+) 13...Rg8 14.d4 Bd6 15.Nd2 h5 (15...Ne7 16.Ne4 Nd5 17.Qf3+-) 16.Ne4 Be7 (16...Qh4 17.Nd6 cd6 18.d5+-) 17.Rfd1 Qb8 (17...Qc8 18.Rac1+-) 18.Qf3 (18.d5 ed5 19.Bd5 Nd8+-) 18...b5 19.Bb3 Qb6 (19...Nd8 20.d5 Rf8 21.Nf6 Bf6 22.Qf6+-) 20.Rac1 Rd8 (20...Nd8 21.Nf6 Bf6 22.Qa8+-) 21.Nc5 (better 21.Rc6 Qb8+-) 21...a5 (21...Bc5 22.dc5 Qb7 23.Bf6+-) 22.ba5 (better 22.Ne6 fe6 23.Rc6 Qb7 24.Be6 Rf8+-) 22...Na5 23.Ba2 h4 (23...Rb8 24.Nd3+-) 24.Nb3 (24.Nd3 Rf8+-) 24...g5 Black plans b4 (24...Nc4 25.Bc3 Ba3 26.Rb1+-) 25.Bc3 (25.Na5 Qa5 26.d5 Qb6 27.de6 fe6 28.Rd8 Bd8+-) 25...Nb3 26.Bb3 Ba3 27.Ra1 b4 (27...g4 28.hg4 Be7 29.d5+-) 28.Ba4 (28.d5!? bc3 29.de6 fe6 30.Qh5 Ke7 31.Rd8 Kd8 32.Ra3 Qc6+-) 28...Kf8 29.Rdb1 Qa5 30.Ra3! bc3 (30...ba3 31.Bb4 Double attack (31.Ba5 Pinning; 31.Ba5 Deflection; 31.Bb4 Decoy)) 31.Qh5 (31.Qf6!? Rc8+-) 31...c2 32.Rc1 Qd2 (32...c5 33.Raa1 cd4 34.Bc2+- (34.Rc2?! d3 35.Rb2 Qc3+-)) 33.Rc2 Qe1 34.Kh2 Qb4 35.Qh6 (35.Ra1 Ra8 36.Qh6 Rg7+-) 35...Rg7 36.Qh8 (36.Raa2 Qd6 37.Kg1 Kg8+-) 36...Rg8 37.Qh6 Rg7 38.Rca2 (38.Raa2 Qd6 39.Kh1 Kg8+-) 38...c5 (38...Qd6 39.Kg1+-) 39.Qf6 (better 39.Rb3 Qc4 40.Qh8 Rg8 41.Qf6+-) 39...Rb8 (39...Qb8 40.f4 gf4+-) 40.Rb3 Qb3 41.Bb3 Kg8 42.Bc4 (better 42.dc5!? Rg6 43.Qe7 Rg7+-) 42...cd4 43.Qd4 Rg6 44.Bd3 Rg7 45.Qd6 Rf8 46.Ra7 g4 47.Rd7 gh3 48.gh3 1-0. Fuirio (1665) - miri1351, Rated Classical game, lichess.org, 2013.

6.a3 Nf6 7.Nf3 (7.Bf6 ef6 8.d4 Bd6 9.Nf3 0-0 10.Bd3 Qd7 11.0-0) 7...e6 8.0-0 Bd6 9.Nc3 0-0 10.d4 Qe7 11.Qe2.

6.Qf3 e6 7.a3 (7.e4 Bg6 8.a3 Nf6 9.Bf6 gf6 10.Qe2 b5 11.Bd3) 7...Nf6 8.Ne2 Rg8 9.0-0 Bg4 10.Qf4 Bd6 11.Qg5.

6.a3 Bb1 7.Rb1+= Nf6 8.d4 Bd6 9.Qf3 Nc6 10.Bb3 0-0 11.Ba4 Qd7 12.Ne2 (12.Bc6!? Qc6 13.Qc6 bc6 14.Nf3+=) 12...b5= 13.Bb3 a5 14.Rc1 Ne7 (14...Ra6 15.e4 ab4 16.e5 ba3 17.Bc3=) 15.e4 ab4 16.e5 ba3 17.Bc3 b4 18.ef6 bc3 19.fe7 Be7 20.0-0 Ra5 21.Qc3 Qb5 22.Qc7 Qb3? (better is 22...Bd6 23.Qd6 Qb3+-) 23.Qa5 (23.Qe7?! Qb2 24.Rfe1 Rfa8+-) 23...Qb2 24.Qa6 h6 25.Rc7 Qe2 (25...Bb4+-) 26.Re7 (better is 26.Qe2 Bf6 27.Qd3+-) +/–. Steinutz – Stiller, ChessWorld.net, 2002.

6.a3 f6 7.Qh5+- Bg6 8.Qh3 Qd6 (8...Nc6!?+-) 9.Be6+- (9.Qe6?! Qe6 10.Be6 Nd7+-) 9...Ne7 10.Nc3 Nbc6 11.Nge2 Nd8 12.Ba2 (12.Bb3 Bf7 13.Ba4 Ndc6+-) 12...Ndc6 (12...Qd7 13.Qf3 Nec6 14.Nf4+-) 13.d4 Bf5 14.g4 Bd7?? (14...Bg6+-) 15.Ne4 1–0. Janek – Frederico, internet, 2018.

6.a3 Nf6!?=.

6.Qb3 b5 7.Be2= Nc6 8.Bf3? (8.a3 Qd7=) 8...Qd7 (better 8...Nb4!? 9.e4 Bg6-+) 9.Qc3 Nge7 10.Ne2 (10.e4 Bg6=) 10...Rd8 (10...Nd5!? 11.Bd5 Qd5-/+) 11.0-0 (11.e4 Bg6=) 11...Nd5 Pawn b4, live or die! 12.Bd5 Qd5 13.Nf4 (13.a3 e5=) 13...Qd7 (13...Qc4 14.a3 Qc3 15.Bc3=+) 14.a3 (14.Nh5 e5=+ (14...Bb4? 15.Qg7 Ke7 16.Qg5 Kd6 17.e4+-; 14...Nb4?! 15.Ng7 Bg7 16.Qg7=)) 14...f6 (14...e5 15.Rc1 Be4 16.f3 Bb1 17.Rab1 ef4 18.Qc6 Qc6 19.Rc6 Rd2 20.ef4+=) 15.d4 (better 15.Rc1 Ne5 16.Qc7 Qc7 17.Rc7=) 15...g5?? (better 15...Bd6 16.Nd3 Ne7=+) 16.Nh5+- Kf7? (better 16...Be7 17.Ng7 Kf7 18.Nf5 ef5+-) 17.d5!+- Ne5 (17...Qd5 18.Qf6 Double attack (18.Qf6 Discovered attack); 17...ed5 18.Qf6 Double attack (18.Qf6 Discovered attack)) 18.Nf6! Qd6 (18...Kf6 19.Qe5 Double attack (19.Qe5 Remove defender)) 19.Qe5 Qe5 20.Be5 Bg7 21.de6 (21.e4 Bf6 22.f4 gf4 23.de6 Ke6 24.Bf6 Kf6 25.Rf4 Rd1 26.Kf2 Rh1+-) 21...Ke6 22.Nd7 (22.e4 Bg6 23.Bc7 Rc8+-) 22...Rd7 (22...Be5 23.Ne5 Ke5 24.a4+=) 23.Bg7 Rg7 24.Nd2 Rd8 (24...Rd7 25.Nb3 Ke7 26.Nc5+-) 25.Nb3 Kf6 (25...Ke5 26.Nc5+-) 26.Nd4 (26.Nc5 Rd6+-) 26...Be4 (26...Rd6 27.f4 Be4 28.a4+-) 27.Rfd1 (27.a4 ba4 28.Ra4 Rd6+-) 27...Rgd7 28.Rdc1 Bd5 29.a4 Bc4 30.ab5 ab5 31.Ra6 Kf7 (31...Rd6 32.Rca1+-) 32.h3 (32.Rh6 Kg8+-) 32...Rd6+- 33.Rca1 Ra6 (33...Ke8 34.Kh2+-) 34.Ra6 Rc8 (34...Rd6 35.Ra7 Rd7 36.Rb7+-) 35.Nc6 (35.Nf3 c5 36.Ng5 Kg7 37.Ra7 Kg6+-) 35...Ke8 (35...Re8 36.g4+-) 36.Ne5 (36.f4!? gf4 37.ef4 Bd5+-) 36...c5+- 37.bc5 Rc5 38.Nc4 (38.f4!?+-) 38...bc4+= 39.Ra2 Ke7 40.Kf1 Ke6 (40...h5 41.Ke2+-) 41.Ke2+- Ke5 (41...Kd5 42.Kd2 Rb5 43.g4+-) 42.f3 (42.Kd2!?+-) 42...h5 43.g3 Kf5 (43...Rb5 44.Kd2+-) 44.e4 Ke5 (44...Ke6 45.Ke3 Rb5 46.Ra3+-) 45.Ke3+- Rb5 46.f4 gf4 (46...Kf6 47.Ra3+-) 47.gf4 Kd6 48.Kd4 Rb4 (48...Rb3 49.Kc4 Rh3 50.e5 Ke6 51.Kd4+-) 49.f5 (49.Rc2 Rb1 50.Rc3 Rd1 51.Kc4 Rf1+-) 49...c3 50.Kd3 Rb3 (50...Ke5 51.Ra5 Kd6 52.Rd5 Kc6 53.f6+- (53.Kc3?! Re4 54.Ra5 Rh4+=)) 51.Rc2 Ke5 52.Rc3 Rb4 (52...Rb1 53.Rc5 Kf6 54.Rc6 Kg5 55.Kd4+-) 53.Rc5 Kf6 54.Rc6 Ke5 (54...Kg5 55.Rc3+-) 55.Re6 Kf4 56.f6 Rb8 (56...Rb7 57.e5 Kg5 58.Ke4+-) 57.e5 Kf5 58.Re7 Rf8 (58...Kg6 59.f7 Kg7 60.e6+-) 59.Kd4 (59.f7 Rd8 60.Ke3 Rf8+-) 59...Kg5 (59...Kg6 60.Ke4 Kg5 61.Rg7 Kh6 62.Kf5+-) 60.Rg7 (better 60.f7+-) 60...Kh4 (60...Kf5 61.Rd7 Ra8+-) 61.Ke4 Kh3 62.Kf5 h4 (62...Rb8 63.f7 Rb2 64.e6+-) 63.e6 White prepares f7 63...Kh2 64.e7 Rc8 65.f7 Rc5 66.Ke6 h3 (66...Rc1 67.f8Q Re1 68.Kf7 Rf1 69.Kg8 Rg1 70.Qf2 Kh3 71.e8Q Rg7 72.Kg7 Kg4 73.Qe6 Kg5 74.Qff5) 67.f8Q Rc6 68.Kd7 (68.Kd5 Rc5 69.Kc5 Kh1 70.Qf1 Kh2 71.Qg1) 68...Rc2 (68...Rf6 69.Qb8 Kh1 70.Qb1 Rf1 71.Qf1 Kh2 72.Qg1) 69.Qf4 Kh1 70.Qf1 Kh2 71.Qg1 1–0. jaddwarrior (1860) – Sherv2014 (1805), ChessWorld.net, 2014.

6.Qb3 Nc6 7.a3=+.

6.Qf3 Nc6 7.a3 (7.e4 Bg6 8.a3 Nf6 9.d3 Nd4 10.Qd1 b5 11.Bb3) 7...Qd6 8.e4 Ne5 9.Be5 Qe5 10.Nc3 Rd8 11.Nge2.

6.Nf3 Nc6 7.a3 Bd6 8.Bg7 Be5 9.Ne5 Ne5 10.Be5 (10.Bh8?! Nc4 11.d4 a5+-) 10...f6 11.Bb2 Ne7 (11...b5 12.Be2+-) 12.Bf6 Rg8 13.Nc3 (13.Qh5 Kd7+-) 13...Kf7 (13...Rg2 14.Qf3 Rg6 15.Be7 Ke7 16.Qb7+-) 14.Be5 Bd3 (14...Nc6 15.Qh5 Bg6 16.Qf3 Ke8+-) 15.Qf3 Nf5 16.Bb3 (16.Qh5 Kf8 17.Be6 Qe8 18.Qe8 Re8 19.Bg8 Re5 20.Bh7 Ne3 21.de3 Bh7+-) 16...Ke7 (16...Kg6 17.Be6 Re8 18.Qg4 Qg5 19.Bf7 Kf7 20.Qg5 Re5 21.g4+-) 17.g4 Nh4 (17...b6+-) 18.Qf6 Kd7 19.Qe6 1–0. Janek – Vesely, internet, 2016.

6.Nf3 Bg4 7.h3 Bh5 8.Be2 (8.g4 Bg6 9.Nc3+=) 8...f6? (better 8...Nc6!?=) 9.a3 (9.Qb3 Nc6+-) 9...Bd6 10.Nd4 (10.Qb3 Qe7 11.Nc3 Nc6+-) 10...Bf7 (10...Be2 11.Qe2 Qd7 12.Qh5 g6 13.Qf3+=) 11.Bh5 (11.Bc4 Be5+-) 11...Qe7 (11...Qd7 12.Nc3+-) 12.Bf7 (12.0-0 Nh6 13.Bf3 c6+=) 12...Qf7 13.Qb3 (13.Qf3 Ra7 14.Qg4+=) 13...Be5 (13...e5 14.Qa4 Qd7 15.Qd7 Nd7 16.Nb3=) 14.f4 (14.Nf3 Bb2 15.Qb2 Ne7=) 14...Bd4 15.Bd4 Nc6 16.Bb2 (16.0-0 Nd4 17.ed4 Rd8=) 16...Nge7 (16...e5 17.Qf7 Kf7 18.fe5 fe5 19.d3=) 17.0-0= Nf5 18.e4 (18.Nc3 0-0=) 18...Nfd4=+ 19.Bd4 Nd4 20.Qc4 Qd7 21.Ra2 Nb5 (21...Qd6 22.Nc3=+) 22.Nc3= Qd4 23.Qd4 Nd4 24.Na4 (24.Kf2 Kf7=) 24...b6 25.Kh2 (25.Nc3 0-0-0=+) 25...0-0-0 26.Nc3 Nb3 The backward pawn on d2 becomes a target 27.Rd1 Rd6 28.Rb2 Nd4 29.b5 (29.a4 Kb7=+) 29...a5 (29...Nb5!? 30.Nb5 ab5 31.Rb5 Rhd8-/+) 30.d3 Rhd8 31.Kg1 g6 32.Kf2 Rf8 33.Ne2 g5 34.Nd4 Rd4 35.fg5 fg5 36.Ke3 e5 37.Rc2 Rf6 (37...Ra4 38.Rc3=) 38.Rdc1 Rd7 39.Rc6 Rfd6 40.Rd6 Rd6 41.Rf1 h6 42.Rf5 Re6 43.d4 ed4 44.Kd4 Kd7 (44...c6 45.Rf8 Kd7 46.bc6 Rc6 47.Rh8=) 45.Rd5 (better 45.Rf7 Kd8 46.e5+-) 45...Ke7?? (better 45...Kc8+=) 46.Re5+- a4?? (better 46...Re5 47.Ke5 c5 48.bc6 b5+-) 47.Re6 Ke6 48.g4 Kd6 (48...c5 49.bc6 Kd6+-) 49.e5 Ke6 (49...Ke7 50.Kd5+-) 50.Ke4 Ke7 51.Kd5 (better 51.Kf5 c5 52.bc6 b5+-) 51...Kd7 (51...Kf7 52.e6 Kf6 53.Kc6 Ke6 54.Kc7+-) 52.e6 Kd8 53.Kc6 (better 53.Ke4+-) 53...Kc8 54.e7 Kb8 55.e8Q Ka7 56.Kc7 h5 57.Qb8 1–0. Bares Moreno,Pau (1920) – Montero Mateo,Angel, Primera Provincial Norte, 2009.

5.Nf3 e6 6.a3 Nd7 7.c5 b6 8.d4 Bb1 9.Qb1 Ngf6 10.Bd3 a5 11.0-0 ab4 12.ab4 Be7 13.b5 bc5 (13...Rc8!? 14.bc6 Rc6+/–) 14.bc6 Nb6 15.dc5 Bc5 (better is 15...Ra1 16.Ba1 Na8+-) 16.Bf6 gf6 17.Qb5 Bd6 (17...Ra1 18.Ra1 Qd6+-) 18.c7 Qd7 (18...Nd7 19.cd8Q Rd8 20.Ra7+-) 19.Ra8 Na8 20.c8Q (20.c8Q Ke7 21.Qbd7 mate) 1–0. Fournier,Frederic (2000) – Adamas, Correspondence Chess Server (T2362012), 2012.

5.Nf3 f6 6.cd5 cd5 7.d4 (7.Nh4 Be6+=) 7...Nd7 (7...e6 8.a3=) 8.Be2 e5 9.de5 Bb4 10.Nbd2 Ne7 (10...fe5 11.Ne5 (< 11.Be5 Ne5 12.Ne5 Bc3 13.Qa4 b5 14.Bb5 ab5 15.Qb5 Bd7 16.Qd5 Nh6=+) 11...Ngf6 12.0-0=) 11.ef6 Nf6 12.0-0 0-0 13.a3 Bc5 14.Rc1 b6 15.Nb3 Qd6 15...Ne4 16.Nbd4+=) 16.Nbd4 (16.Be5!? Qe6 17.Nc5 bc5 18.Bf6 (18.Rc5?! Nd7 19.Bd4 Nc5 20.Bc5 Be4=) 18...Qf6 19.Rc5+/–) 16...Bg4 17.Ng5 Be2 18.Qe2 Qd7 (18...Bd4 19.Bd4 Nf5 20.Bb2=) 19.h3 (19.Nde6!? Rfc8 20.Qf3+/–) 19...Ne4 20.Ne4 de4 21.Qc4 Rf7 (21...Nd5!?+/–) 22.Ne6+- Qb5 (22...Qd5 23.Rfd1 Qc4 24.Rc4+-) 23.Bg7 (better is 23.Qe4 Ra7 24.Rb1+-) 23…Qc4= (24.Rc4 Rg7 25.Ng7 Kg7=). Suess,Stefan – Schloetterlein, Odenwald, 1984.

5.a3 dc4 6.Bc4 e6 (6...e5 7.Nf3 e4 8.Qc2 Nh6 9.Nd4 Nd4 10.Bd4 Qd6) 7.Nf3 Nf6 8.0-0 Bd6 9.Nc3 0-0 10.d4 Qe7.

5.a3 e6 A) 6.Nf3 Nf6 (6...dc4 7.Bc4 Nf6 8.0-0 Bd6 9.d4 0-0 10.Nc3 Re8) 7.cd5 ed5 8.Be2 Bd6 9.0-0 0-0 10.d3 Re8; B) 6.cd5 ed5 (6...Qd5 7.Nc3 Qd7 8.Nf3 Nf6 9.b5 Nb8 10.Qa4 c6) 7.Nf3 Nf6 8.b5 ab5 9.Bb5 Bd7 10.0-0 Bd6.

5.a3 Nf6 A) 6.cd5 Qd5 (6...Nd5 7.Nf3 Qd6 8.b5 ab5 9.Bb5 f6 10.0-0 e5) 7.Nf3 e5 8.d4 ed4 9.Nd4 Rd8 10.Nd2 Nd4; B) 6.Bf6 ef6 7.d4 dc4 8.Bc4 Bd6 9.Nf3 0-0 10.0-0 Re8; C) 6.Nf3 dc4 (6...e6 7.c5 Be7 8.Be2 0-0 9.0-0 Bg4 10.d3 b6) 7.Bc4 e6 8.0-0 Bd6 9.Nc3 0-0 10.Rc1 Qd7.

5.b5 Nb4-/+ 6.d3 (better is 6.Na3!?-/+ dc4 7.Qa4 Nd3 8.Bd3 Bd3 9.Nf3 c6 10.bc6 b5) 6...dc4-+ 7.a3 (7.e4 cd3 8.ef5 Nc2 9.Kd2 ab5-+ 10.a3 Na1) 7...Nd3 8.Bd3 cd3 9.a4 (9.ba6 Ra6 10.Nd2 Nf6-+) 9...e6 (9...ab5 10.Qf3 e6) 10.Nc3 (10.ba6 Ra6 11.Nd2-+; 10.Nd2 Nf6) 10...g6?? (10...ab5!? 11.ab5 Ra1 12.Ba1-+) 11.Nf3? (better is 11.e4 Qg5 12.ef5 Qg2 13.Qf3 Qf3 14.Nf3 ef5 15.Nd5+=) 11...Bb4 (11...Bg7 12.0-0-+) 12.0-0 Qf6?? (12...f6 13.Nd4-+) 13.Nd4?? (better is 13.Qb3!? Bd6 14.e4+/–) 13...c5 (better is 13...Rd8!?-/+) 14.bc6= e5?? (14...bc6 15.Na2 Be7 16.Qc1=) 15.Nf5 (15.Nd5!? Qd6 16.Nb4 ed4 17.cb7+-) 15...Qf5 (15...Bc3 16.cb7 Rb8 17.Ng7 Qg7 18.Bc3+-) 16.Nd5 (16.e4 Qe6 17.Nd5 Bd6 18.cb7 Rb8+/–) 16...Bd6 (16...Ba5 17.cb7 Rb8 18.Qc1 Rb7 19.Be5+-) 17.cb7 Rb8 18.Qb3 Ne7 (18...f6 19.Ba3 Ba3 20.Ra3+-) 19.Nf4 (19.f4!? Nd5 20.Qd5+-) 19...0-0 (19...d2 20.Rad1 Qe4 21.Rd2 Rb7 22.Qc3+/–) 20.Nd3 Qd7 (20...e4!? 21.Nf4 Bf4 22.ef4 Qd5 23.Qd5 Nd5=) 21.Ne5+/– Qf5? (21...Be5 22.Be5 Rb7 23.Rfd1+/–) 22.g4 (22.f4 Qe6 23.Qe6 fe6+-) 22...Qg5? (better is 22...Qe4 23.f3 A) 23...Rb7?? 24.Nf7 (24.fe4?! Rb3 25.Nc4 Bc5+=) 24...Rf7 25.Qf7 (25.fe4? Rb3 26.Bd4 Nc6-+) 25...Kf7 26.fe4 Ke8 27.Bd4+-; B) 23...Qb7 24.Qb7 Rb7+/–) 23.f4+- Qh4 24.Nd7?? (better is 24.Kh1 Be5 25.Be5 (25.fe5?! Qg4 26.Rf4 Qd7+=) 25...Qg4 26.Bb8 Rb8 27.e4+-) 24...Qg4-+ 25.Kh1 (25.Kf2 Qd7 26.Qc3 f6 27.Qc4 Kg7 28.Qa6 Rb7-+) 25...Qd7 26.Qc3 (26.Rab1 Qc6 27.Kg1 Rb7-+ (worse is 27...Qb7 28.Qc3 f6 29.Qc4 Qd5 30.Qd5 Nd5 31.Rfd1-+)) 26...f6 (better is 26...Qb7 27.e4 Qb2 28.Qb2 Rb2-+) 27.Rad1 (27.Qc4 Rf7 28.Qa6-+) 27...Qb7 28.Kg1 Rbc8 (28...Nf5 29.Qc4 Qf7 30.Qf7 Kf7 31.Bd4-+) 29.Qd4 (29.Qd3 Nf5 30.Bd4 Rfe8-+) 29...Rc2 30.Rd2 Rd2 (30...Bc5!? 31.Qd3 Rd2 32.Qd2-+) 31.Qd2 Bb4 (31...Nf5 32.Bd4-+) 32.Qd4 (32.Qd3 Bc5-+) 32...Nd5 (32...Nf5!? 33.Qc4 Kg7 34.Bd4-+) 33.e4 (33.f5 Bd6 34.Rd1 Be5 35.Qd5 Qd5 36.Rd5 Bb2-+) 33...Qb6 34.ed5 (34.Kh1 Qd4 35.Bd4-+) 34...Qd4 (better is 34...Bc5 35.Qf2 Rd8-+) 35.Bd4+= f5 (35...Rd8 36.Bf6 Rd5 37.Be5+=) 36.Rc1 (36.Rd1 Kf7+=) 36...Bd2 (36...Rd8 37.Be5+=) 37.Rc7 (better is 37.Rc6 Rd8 38.Ra6 Rd5 39.Be5=) 37...Re8?? (better is 37...Rd8!?=) 38.d6 (38.Be5 Rd8 39.d6 Bb4 40.Rg7 Kf8 41.Rh7 Bd6 42.Rh8 Ke7 43.Rd8 Be5+-) 38...Bf4 (better is 38...Ba5 39.Rc6 Rd8+/–) 39.d7?? (better is 39.Rg7 Kf8 40.d7+/–) 39...Re1-+ 40.Kf2 Bc7 41.Ke1 Kf7 42.Be5 Bd8 43.h4? (43.Bd4 Ke7-+) 43...Ke7 (better is 43...Bh4!? 44.Kf1 Ke6 45.Bg3-+) 44.Bf4 (44.Ke2 Kd7 45.Bg3 Kc6-+) 44...Kd7 45.Bg5 (45.h5 gh5 46.Kf2 Bc7-+) 45...Ba5 (better is 45...Bg5 46.Ke2 Bh4-+) 46.Ke2 Kc6 47.Kd3 Bc7 48.Kd4 Bb6 (48...Kb6 49.Kc4-+) 49.Ke5 Kc5?? (49...Bf2 50.Kf4-+) 50.Be7?? (50.Be3 Kc6 51.Bg5-+) 50...Kc4-+ 51.Kf6 (51.h5 Kb3-+) 51...Bd4 52.Kf7 f4 53.h5 gh5 54.Bh4 Kb4 55.Kg8 f3 56.Kh7 f2 (56...f2 57.Bf2 Bf2-+) 0–1. Trkn – shred, itsyourturn.com, 2000.

5.cd5!? Qd5 6.Nc3= Qd7 (6...Qd6 7.b5 ab5 8.Bb5 e5 9.d4 ed4 10.Qd4 Qd4) 7.b5 ab5 8.Bb5 Bd3 9.Bd3 Qd3 10.Qb3 Qd7.

5.a3 Nf6 6.Nf3 Ne4 7.cd5 Qd5 8.d3 Nf6 9.e4 Be4 10.de4 Qd1 11.Kd1 Ne4 12.Ke1 Nc6 13.Nc3 Nf6 14.Bd3 0-0-0 15.Ke2 Bb4 16.ab4 Nb4 17.Bb1 Ng4 18.Ra4 Nc6 19.Rg4 Rhg8 20.Bh7 Rh8 21.Rg7 Rhf8 22.Ba3 Rfe8 (22...Rh8 23.Rf7 Nd4 24.Nd4+-) 23.Rf7 Ne5 (23...Nd4 24.Nd4 Rd4+-) 24.Ne5 (24.Ne5 Rd4 25.Rc1+-) 1–0. Karl – Stefano, internet private, 2018.

5.a3 Nf6 6.Nf3 Bg4 7.h3 Bh5 8.cd5 ed5 9.Bf6 (9.g4 Bg6=) 9...Qf6 (worse 9...gf6 10.d4+-) 10.Nc3 (10.d4 Bd6=) 10...c6=+ 11.Be2 (11.d4 Bd6=+) 11...h6 (11...Bd6 12.d4=+) 12.0-0 (12.d4 Bd6=) 12...Bd6 13.e4 (better 13.d4=) 13...0-0?? (better 13...Bf3 14.Bf3 d4=) 14.e5!+- (14.ed5?! Re8+=) 14...Be5 15.Ne5 Be2 16.Qe2 Re8 17.d4 (better 17.Ng4 Qd8 18.Qd3+-) 17...Nd7?? (17...Qf5+-) 18.Nd7 Qd4 19.Qf3 f6 (19...Re7 20.Rfd1 Qa7 21.Qg4+-) 20.Rad1 Qh4 21.Rfe1 Qg5 (21...Red8 22.Re7 f5 23.Qe3+-) 22.Nc5 b6 (22...Re1 23.Re1 a5 24.Nb7 ab4 25.ab4+-) 23.Ne6 Qg6 24.Qf4 (24.Nd4 Re1 25.Re1 Re8+-) 24...Rac8 25.Qd6 Qc2 (25...Qf7 26.Na4 Qe7 27.Qg3+-) 26.Ne4! de4 (26...Kh8 27.Qd7 Rg8+-) 27.Qd7 Re6 28.Qe6 Kh7 (28...Kf8 29.Rd7 Qf2 30.Kf2 e3 31.Re3 c5 32.Qf7) 29.Qf5 Kg8 30.Qc8 Kf7 (30...Kh7 31.Qf5 Kg8 32.Qg6 Qd2 33.Rd2 Kf8 34.Rd8 Ke7 35.Qe8) 31.Rd7 (31.Rd7 Kg6 32.Qe8 Kh7 33.Qf7 Qf2 34.Kf2 e3 35.Ke3 c5 36.Qg7) 1–0. Janek – Guttes, internet free game, 2017.

5.b5 Nf6 6.a4 (6.cd5 ed5 7.Bf6 Qf6=+) 6...ab5 7.ab5 Ra1 8.Ba1 Bc5 9.d4 Bb4 10.Bc3 Qe7 (10...Be7 11.Nd2=+) 11.c5= Bc3 12.Nc3 e5 13.Nf3 e4 (13...ed4 14.Qd4 0-0 15.Nd5 Nd5 16.Qd5=) 14.Nd2+= 0-0 15.Be2 b6 (15...Nbd7 16.Qa4+=) 16.c6 h5 17.Qb3 Rd8 18.h3 g5 19.h4 g4 20.0-0 Be6 21.g3 Nh7 22.Ra1 f5 (22...Qd6!? 23.Ra7+-) 23.Ra7+- 1–0. Janek – Gu23, free chess online, 2018.

5.c5 Nf6 6.Nf3 a5 7.b5 (7.a3!?=) 7...Bc5-/+ 8.d4 Bb4 9.Nbd2 c6 10.a3 Bd2 11.Qd2 0-0 12.a4 cb5 13.ab5 b6 14.Ba3 Re8 15.Ne5 Nbd7 16.Nc6 Qc7 (16...Ne4 17.Nd8 Nd2 18.Kd2 Red8 19.Be2=+) 17.Be2 Kh8 18.0-0 e5 19.f4 (better is 19.Rfc1!? ed4 20.Nd4=) 19...ed4 20.Qd4 Re4 21.Qc3 (better is 21.Qd2 Bg4 22.Bd3=) 21...Rae8-+ 22.Bc1 Bg4 23.Bg4 (23.Bd3!? Nb8 24.Qc2=+) 23...Ng4-+ 24.Rf3 Nc5 25.h3 Ne3?? (better is 25...Nf6-/+) 26.Be3+- (26.Re3?! Qf4 27.Ra3 a4+=) 26...f5 (26...Rc4 27.Qd2+-) 27.Ne5 Qa7 (27...Rb4+-) 28.Bc5 bc5 29.Qd2 (29.Qa5!? Qa5 30.Ra5 Rb4+-) 29...c4 30.Kh2 d4 (30...Qb7+-) 31.Nc4 Re2 32.Qd3 (32...a4 33.Nd6+-) 1–0. maxum – ThatOne, Live Game Caissa's Web, 2004.

5.Nf3 Bb4?? 6.Bg7 dc4 7.Bc4 +-.

5.Nf3 Nd7 6.cd5 ed5 7.Be2 Ngf6 (7...Bb4?? 8.Bg7 Ngf6 9.Bh8+-) 8.a3 Be7 9.Nc3 c6 10.0-0 0-0 11.Nd4 Bg6 12.f4 h6 13.Bf3 a5 14.Qb3 Qc8 (14...Bd3 15.Be2 Be2 16.Nce2=) 15.Rac1 Nb6 16.Be2 Be4 (better is 16...ab4!? 17.ab4 Qd7=) 17.f5 g6? (17...ab4 A) 18.Ne4 Ne4 (18...de4?! 19.ab4 Nbd5 20.b5=) 19.f6 Bf6 20.Qb4 Na4-/+; B) 18.ab4 g6 19.g4+=) 18.fg6 (18.ba5!? Nbd7 19.a6 Ra7+-) 18...Bg6+/– 19.Rf4 (19.ba5 Nc4 20.Bc4 dc4 21.Qc4 Ra5+/–) 19...Qb8 (19...ab4 20.ab4 Qd7 21.d3+=) 20.Nf5 Bf5 21.Rf5 a4 (21...ab4 22.ab4 Qd6 23.b5+=) 22.Qc2 (22.Na4 Na4 23.Bf6 Bf6 24.Rf6 Kg7+-) 22...Nc4 (better is 22...Qd6!?+/–) 23.Bc4 dc4 24.Ne2 Ng4 25.Nf4 Bg5? (25...Qd6 26.Qc3 (26.Qc4?! Qd2 27.Ng6 Qb2 28.Ne7 Kh8+=) 26...Bf6 27.Rf6 Qf6 28.Qf6 Nf6 29.Bf6+-) 26.Qc4 (better is 26.Qd1 Nh2 27.Kh2 Qd6 28.Rc4 Rfd8+-) 26...Qd6 27.Qe2 Bf4? (27...Nf6+-) 28.Qg4 (28.ef4?! Qg6 29.Rfc5 Rfe8+/–; 28.Rf4?! f5+-) 28...Qg6 (28...Bg5 29.h4+-) 29.Rf4 Kh7 30.Qf5 (30.Qf3 f6+-) 30...Rad8 31.Qg6 Kg6 32.Rf6 Kg5 (32...Kh5 33.Rc5 Rd5 34.Rd5 cd5 35.Rf5 Kg6 36.Rd5 Rc8+-) 33.Rc5 (33...Rd5 34.Rd5 cd5 35.Rd6+-; 33.e4 Rd3 34.Rc5 Kg4 35.h3 Rh3 36.gh3 Kh3 37.Rc3 Kg4 38.Kh2 Rb8 39.Rg3 Kh5 40.Rf5 Kh4 41.Bf6#) 1–0. Otte,Marco – Bijlmakers,Steef, Wag.Intcomp Wageningen, 2002.

5.Nf3 h6 6.Be2 Nf6 7.a3 Be7 8.0-0 0-0 9.d4 c6 10.c5 Nh7 11.Bd3 Bd3 12.Qd3 Nd7 13.Nbd2 Qc7 14.Rfe1 Rae8 15.e4 f6 (15...de4 16.Ne4 Rd8 17.Nc3=) 16.e5 fe5 17.Ne5 Rf5 18.Ng6 Nhf8 19.Re6! Rf7 (19...Ne6 20.Ne7 Double attack (20.Qf5 Remove defender)) 20.Ne7 Rfe7 21.Re7 Re7 22.Nf3 Qf4 23.Re1 Re1 24.Ne1 Nf6 25.g3 Qg4 26.Qf3 Qg6 27.Nd3 Ne6 28.Qe2 Qf5 29.f3 Ng5 30.g4?? (better is 30.Ne5+/–) 30...Nf3-+ 31.Kh1? (31.Kg2 Qg4 32.Kf2 Nh2 33.Qg4 Nhg4 34.Kf3-+) 31...Qg4 (31...Ng4?! 32.Qe8 Kh7 33.Qe2-+) 32.Qg2 (32.Qf2 Qe4 33.Nf4 Ng5 34.Qg2 Qb1 35.Qg1 Qb2 36.Qe3 Qh2 37.Kh2 Ng4 38.Kg1 Ne3 39.Kf2-+) 32...Qe4 (32...Qe4 33.Qg3 Qd3-+) 0–1. purplegadge (1770) – apostol7 (1755), gameknot.com, 2014.

5.a3 Qd6 6.d4 0-0-0 (6...Nf6 7.Nbd2=) 7.Bd3 Bg4 8.Nbd2 Nf6 9.c4 dc4 10.Nc4 Qd7 11.Be2 Be6 12.Nce5 Ne5 13.Ne5 Qe8 14.Rc1 Nd7? (better is 14...Bd5 15.f3 g6+/–) 15.Qc2+- Kb8 (15...c5 16.Nd7 Rd7+-) 16.Qc7 Ka8 17.Bf3 Rb8 18.Nd7 (better is 18.Rc6 Nc5 19.bc5 Qc6 20.Bc6 bc6 21.Nc6 Rb7 22.Qd8 Bc8 23.Qc8 Rb8 24.Qb8) 18...Bd7 (18...Qd7 19.Qa5 Qb5 20.Qb5 ab5+-) 19.Qa5 (better is 19.Qb6 Bc6 20.Bc6 Qc6 21.Rc6+-) 19...Bc8 (19...Bb5 20.a4 Qd8+-) 20.Qa6 1–0. Fournier,Frederic (1890) – pingonegro, Active, 2011.

5.a3 e6 6.c4 Nge7 7.Be2 dc4 8.Bc4 b5 9.Be2 Ng6 10.Nc3 Bd6 11.0-0 0-0 12.d4 Nce7? (12...Re8 13.Rc1+=) 13.h3?? (13.e4 Bg4 14.e5 Nf4+-) 13...c6?? (13...Nd5!?=) 14.Rc1 (better is 14.g4!?+-) 14...Nd5 15.g4 Nc3 16.Rc3 Be4 17.Nh2?? Qb8 18.f4 a5 19.Bf3 ab4 20.ab4 Bf3 21.Nf3 Rc8 22.Qc2 Qb7 23.Rc1 Ne7 24.Ne5? Be5 25.de5 Ra4 26.Rb3 Nd5 27.Qc5 Qe7 28.Bd4 Qc5 29.Bc5= f6 30.ef6 gf6 31.Kf2 Kf7 32.Kf3 e5 33.fe5 fe5 34.e4 Nf4 35.h4 Ne6 36.Bd6?? Nd4-+ (36...Nd4 37.Ke3 Nb3-+) 0–1. Fournier,Frederic (2015) – GarryIceMan (2010), Active (5/0), 2004.

5.b5 ab5 6.Bb5 Bd7 7.a4 e6 8.0-0 Nf6 9.Nc3 Be7 10.Ne2 0-0 11.Ng3 Na5 12.Bd3 c5 13.Ne5 c4 14.Nd7 Qd7 15.Be2 b5 16.ab5 Qb5 17.Bc3 Bb4?? (17...Nc6 18.d3=) 18.Bf6?? (better 18.Rb1 Nc6 19.Bf6 gf6 20.c3+-) 18...gf6+= 19.c3 (19.Rb1 Qa4+=) 19...Bd6= 20.Qc2 (20.d4 Nb3 21.Rb1 Ra2=+) 20...f5 (20...Qb3 21.Qc1=) 21.Rfb1= Nb3 (21...Qc6 22.Nh5=) 22.Ra8 Ra8 23.d3 Bg3 24.hg3 Qc6 (24...Qa4!?+=) 25.dc4+- dc4 (25...Nc5 26.cd5 Qd5 27.Bf3+-) 26.Bc4 Na5 (26...Qc4 27.Rb3 Remove defender) 27.Be2 Rc8 28.Rc1 Kg7 (28...Nc4 29.Qd3+-) 29.c4 h6?? (29...Qc5 30.Qc3 f6 31.Qd4+-) 30.Kh2 (30.Qc3 Kg6 31.Qa5 Qc5+-) 30...Nb7?? (better 30...Qc5+-) 31.Bf3 (31.Qb2 e5 32.Bf3 Qc7 33.Qb7 e4 34.Qb2 f6+-) 31...Qc7 (31...Qb6 32.Rb1 Rc4+-) 32.Bb7 (better 32.Qb2 Kg6 33.Qb7 Qb7 34.Bb7+-) 32...Qb7+- 33.c5 Qc6 34.Qc3 Kg6 35.f3 (35.Qd4 f6+-) 35...h5 36.Kh3 f6 37.Qd4 Qa4?? (better 37...e5 38.Qd2 Kf7+-) 38.Qa4+- (38.Qa4 Rg8 39.c6+-) 1–0. Abdullaevich (1785) – sardorqodirov1990 (1865), lichess.org, 2020.

5.a3 Nf6 6.Be2 h6 7.0-0 Bd6 8.d4 b5 9.a4 ba4 10.Ra4 a5 11.ba5 0-0 12.a6 Qc8 13.a7 Nc6 14.Ba6 Qd7 15.Bb5 1–0. Machete99 – Baraka, ICC, 2002.

5.Be2 Nf6 6.a3 c5 7.c4 Nc6 8.Qa4 Bd6 (8...dc4 9.b5 ab5 10.Qb5=+) 9.0-0 (9.cd5 ed5 10.bc5 Bc5+=) 9...0-0=+ 10.d3 (10.bc5 Bc5 11.d4=) 10...h6 (10...cb4 11.Rd1-/+) 11.Nbd2 (better 11.cd5!? Nd5 12.Qc2+=) 11...cb4-/+ 12.ab4 Bb4 13.Nb3 Nd7 14.Nbd4 Nd4 (better 14...Nc5!? 15.Qc2 dc4 16.Qc4 b5=) 15.Nd4+= Bg6?? (better 15...Bd6 16.Nf5 ef5 17.cd5 b5=) 16.Qb4+- a5 17.Qc3 (17.Qb7?! Rb8 18.Qa7 Rb2 19.cd5 ed5 20.Ra5 Qb6+/-) 17...Nf6 18.f4 (18.Nf3 dc4 19.Qc4 Nd5+-) 18...dc4 19.Qc4 Rc8 (19...Qd7 20.e4+-) 20.Qb3 Qd7 (20...Re8 21.e4+- (21.Qb7?! Rb8 22.Qa7 Rb2+=)) 21.Ra5 Nd5 22.e4 White prepares the advance f5 22...Ne7 (22...Qc7 23.Rb5 Nf4 24.Bg4+- (worse 24.Rb7 Qd6+-)) 23.Bh5 White prepares f5 (better 23.f5 ef5 24.ef5 Bh7+-) 23...Bh5 24.Rh5 Kh7 25.Rf3 Ng6 26.f5 Ne5 27.fe6 (better 27.Rg3 Qc7+-) 27...Nf3 28.Nf3 fe6 29.Ng5?? (better 29.Rb5+-) 29...Kh8?? (better 29...Kg6 30.Qe6 Qe6 31.Ne6 Kh5 32.Nf8 Rf8 33.Bg7 Rd8=) 30.Ne6+- Rg8 (30...Kh7 31.Nf8 Rf8+-) 31.Ba1 (31.Rh6!) 31...Rc1=+ 32.Kf2 Ra1 33.Ng5 (33.Qd5 Qe8=+) 33...Ra6 (better 33...Rf8!? 34.Nf3 Qg4-+) 34.Nf7=+ Kh7 35.Ng5 Kg6 36.Rh6?? (better 36.Qg8 Rf6 37.Nf3 Kh5 38.Kg1=) 36...Kh6-+ 37.Qg8 Kg5 38.Ke3 Qe7 39.Qd5 Kg6?? (39...Kh6 40.Qf5 Qg5 41.Qf4 Qf4 42.Kf4 b5-+) 40.Qf5= Kh6 41.Qf4?? (better 41.Qh3 Kg5 42.Qf5 Kh6 43.Qh3 Kg5 44.Qf5 Kh6=) 41...g5-+ 42.Qg4 (42.Qf5-+) 42...Qc5 43.Kf3 Rf6 44.Kg3 Qe3 45.Qf3 Rf3 (45...Qe1 46.Qf2 Qf2 47.Kg4 Qg2) 46.gf3 Qe1 (46...Qg1 47.Kh3 Kh5 48.d4 g4 49.fg4 Qg4) 47.Kg4 b5 48.Kf5 b4 (48...b4 49.Ke6 b3 50.h4 Qh4 51.Ke7 b2 52.Ke8 b1Q 53.f4 Qb5 54.Ke7 gf4 55.Ke6 Qc6 56.Kf7 Qhf6 57.Kg8 Qce6) 0-1. Zerjio1992 – BuckRogers, Rated Classical game, lichess.org, 2013.

5.a3 A) 5...Nf6 6.g5 (6.h3 Nbd7 7.Nf3 e6 8.g5 Ne4 9.Rg1 b5 10.Be2) 6...Nfd7 7.Nf3 Nb6 8.Be2 Nc6 9.Ra2 Bg4 10.Rg1; B) 5...Nc6 6.b5 (6.h3 e5 7.Bg2 Be6 8.d4 ed4 9.ed4 Nf6 10.Nc3) 6...ab5 7.Bb5 Bd7 8.d3 Ra5 9.Bc6 Bc6 10.Nf3.

5.Be2 A) 5...Qd6 6.a3 (6.Nc3 e5 7.a3 Nc6 8.h3 Nf6 9.b5 ab5 10.Nb5) 6...Nd7 7.d4 Ngf6 8.Nd2 Nb6 9.g5 Nfd7 10.Rc1; B) 5...f6 6.f4 (6.a3 e5 7.Nc3 Be6 8.f4 Bd6 9.Nh3 Nh6 10.0-0) 6...e5 7.fe5 fe5 8.Be5 Nc6 9.Bf4 Bb4 10.Bf3; C) 5...Nc6 6.b5 ab5 7.Bb5 Bd7 8.d3 Ra5 9.Bc6 Bc6 10.Nf3.

5.g5 h6 6.gh6 (6.g6 fg6 7.a3 Bf5 8.Nf3 e6 9.Rg1 Nd7 10.Be2) 6...Rh6 7.a3 Nf6 8.c4 Bg4 9.f3 Bf5 10.cd5.

5.h3 A) 5...e6 6.a3 (6.Nf3 Nf6 7.a3 a5 8.b5 Nbd7 9.Rg1 h6 10.c4) 6...h5 7.Bg2 hg4 8.hg4 Rh1 9.Bh1 Nd7 10.Nf3; B) 5...Nf6 6.Nf3 (6.a3 Nbd7 7.Nc3 Nb6 8.Nf3 e6 9.d3 Be7 10.Bg2) 6...e6 7.a3 a5 8.b5 h6 9.c4 Bd6 10.d4; C) 5...Qd6 6.a3 (6.Nc3 e5 7.a3 Be7 8.Nf3 Nd7 9.Bg2 Nb6 10.d3) 6...e5 7.d4 e4 8.c4 c6 9.Nc3 Be7 10.Rc1.

5.Nf3 Nc6 6.a3 e5 7.d3 Bf3 8.Qf3 h5 9.g5 Qg5 10.Qd5 Nge7.

5.Nf3 Nc6 6.a3 f6 7.Nc3 e5 8.Ne4 de4 9.Ng1 a5 10.b5 Na7.

5.Nf3 e5 6.a3 Bf3 7.Qf3 e4 8.Qd1 h5 9.d3 hg4 10.Qg4 Nd7.

5.Nf3 e5 6.a3 Bf3 7.Qf3 e4 8.Qe2 h5 9.d3 hg4 10.Qg4.

5.Nf3 e5 6.a3 f6 7.Nc3 c6 8.Ne4 de4 9.Nh4 a5 10.b5 Qd5.

5.Nf3 e5 6.Nc3 Bb4 7.Ne4 de4 8.Ne5 f6 9.a3 Be7 10.Nc4 Qd5.

5.Nf3 e6= 6.a3 h5 7.gh5 Rh5 8.d3 Bg6 9.Ne5 Qf6 10.Ng6 Qg6.

5.Nf3 h5 6.d3 Bf3 7.Qf3 e6 8.a3 hg4 9.Qg4 Nf6 10.Qf3 Nbd7.

5.Nf3 h5 6.g5 e6 7.h4 Nd7 8.a3 c5 9.bc5 Nc5 10.Nc3.

5.Nf3 h5 6.g5 e6 7.h4 f6 8.gf6 Nf6 9.Rg1 Bb4 10.Rg7 Rh7.

5.Nf3 h5 6.gh5 e5 7.Nc3 Bf3 8.Qf3 Nf6 9.a3 Rh5 10.e4 d4.

5.Nf3 h5 6.gh5 e6 7.a3 Rh5 8.d3 Bg6 9.Ne5 Qf6 10.Ng6 Qg6.

6.a3 Nd7+= (6...Nc6 7.b5 Nb8 8.h4 h5 9.ba6 Na6 10.g5 Qd6) 7.h4 h5 8.g5 e5 9.c4 a5 10.cd5 ab4.

7.a3 Nc6 8.b5 (8.g5 e5+= 9.b5 ab5 10.Bb5 Bd6) 8...ab5 9.Bb5 hg4 10.fg4 e6 (10...Qd6 11.Ne2+=) 11.h5 Be4 (11...f6 12.Nf3=) 12.Rh3 (12.Nf3 Nh6 13.Rg1 Ra5=) 12...Bd6 (12...f5 13.Be2+=) 13.Bg7 Rh7 14.h6 Bg2 (14...Qg5!? 15.Qe2 Nh6 16.Bh6 Rh6 17.Rh6 Bg3 18.Kd1 Qh6-/+) 15.Rh5= Bg3 16.Ke2 Nf6 17.Bd3?? (better is 17.Rg5 Kd7 18.Bc6 Kc6 19.c4-/+) 17...Nh5-+ 18.Bh7 Qg5 (18...Qh4 19.d4 Ng7 20.g5-+) 19.d4 Qg4 (better is 19...Ng7 20.hg7 Qg7-+) 20.Kd2 Qd1 (20...Qg5 21.Nf3 Bf3 22.Qf3 Ng7 23.hg7 Qg7 24.Bd3-+) 21.Kd1-/+ Ke7 (21...Bf2 22.Ne2 Be3-/+) 22.Nc3 Bf2 (22...Na5 23.e4=) 23.Ke2 Bg1 (better is 23...Bg3=) 24.Rg1+- Be4? (better is 24...Bh3+-) 25.Ne4 e5 (25...de4 26.Be4 e5 27.de5+-) 26.Nc3 ed4 27.Nd5 Kd6 28.Rg5 (28.Rg5 Ng3 29.Rg3 Kd5 30.Bd3+-) 1–0. mtra – Clothov7, internet, 2002.

7.a3 e5 8.g5 Nd7 9.d4=+.

7.a3 e6 8.g5= Nc6 9.Ne2 e5 10.Bh3 Bd6 11.Nbc3 (11.0-0 Nge7=) 11...Nge7=+ 12.Rg1 (12.Bg2 0-0=+) 12...0-0-/+ 13.e4 d4 14.Na2 b5 15.c3 dc3 16.dc3 (16.Nac3 Re8=+) 16...Nc8 (16...Qb8 17.a4-/+) 17.Qb3 (17.c4!? Nb6 18.c5=) 17...Nb6-/+ 18.0-0-0 (18.Rd1 a5-/+) 18...Nc4 19.Rd3 (19.a4 Rb8-/+) 19...Qb8 20.f4?? (better is 20.Rgd1-/+) 20...ef4 (better is 20...Be4!? 21.Qd1 Qb6 22.Bg2 Bd3 23.Qd3 ef4 24.Nd4 Nd4 25.cd4-+) 21.Bf5 N6e5 22.Rd5 (22.Rdd1-+) 22...Ne3 (22...Qb6!? 23.Rd4 Bf5 24.ef5-+) 23.Nf4? (better is 23.Re5 Be5 24.Bg6-/+) 23...Nd5 24.Qd5 Nc4 (better is 24...Qa7 25.Rf1 Nc4 26.Ng6 Qe3 27.Kb1 Qe2-+) 25.Bg6?? (better is 25.Ng6 Qb6 26.Qd4 fg6 27.Be6 Kh7 28.Bc4-+) 25...Bf4 26.Kc2 (26.Kb1 Ne3 27.Qb3-+) 26...Ne3 (27.Kb1 Nd5 28.Bh5 Qb6-+) 0–1. kamera – NN, GameColony.com, 2002.

7.a3 hg4 8.fg4 Qd6 9.Ne2+= Nf6 10.Bg2 e5.

7.g5 Qd6 8.Nc3 Qg3 9.Ke2 c6 10.a3 e5.

5.a3 A) 5...Nf6 6.h4 h6 7.Nh3 e6 8.Nf4 Be4 9.Rh2 Nbd7 10.d3; B) 5...Nh6 6.h4 (6.Bg2 e6 7.h4 f6 8.Nh3 a5 9.g5 Nf7 10.Nf4) 6...f6 7.h5 Bf7 8.f4 e6 9.Nh3 Nd7 10.Bg2; C) 5...Nd7 6.Nf3 a5 7.b5 e6 8.h4 h5 9.g5 Ne7 10.d3.

5.Nf3 e6 (5...f6 6.a3= (6.Nh4 Bf7 7.d4 e5 8.a3 Nd7 9.Nd2 a5 10.b5) 6...e5 7.Nc3 Ne7 8.Bg2 Nbc6 9.d3 Bf7 10.Rg1; 5...Nd7 6.h4 (6.a3 h6 7.Bg2 e6 8.h4 Ngf6 9.Ne5 Ne5 10.Be5) 6...f6 7.Nc3 Bf7 8.e4 de4 9.Ne4 e5 10.a3) 6.a3= (6.h4 f6 7.a3 e5 8.d4 e4 9.Nfd2 f5 10.h5) 6...Nd7 (6...f6 7.Nc3 e5 8.Bg2 Bf7 9.0-0 Qd7 10.h3) 7.h4 h6 (7...Ngf6 8.h5 Be4 9.d3 Bf3 10.Qf3) 8.Ne5 (8.h5 Bh7 9.d3 Ngf6 10.Rg1) 8...c6 (8...Ne5!? 9.Be5 f6+= 10.Bg3) 9.Ng6+= fg6 10.Bd3 Ne7 11.f4 (11.c4 e5+=) 11...Qc7 (11...e5 12.Rf1+=) 12.h5 (12.c4 e5 13.cd5 cd5+=) 12...g5 13.0-0 0-0-0 (13...e5 14.fe5 Ne5 15.Kg2+=) 14.Qe1 (14.Qe2+=) 14...Nf6 (better is 14...Rg8!?=) 15.Be5+/– Qd7 16.Qe2 Rg8 (16...Neg8 17.f5 Ne4 18.Be4 de4 19.Nc3+/–) 17.fg5 hg5 18.c4 (18.Nc3 Qe8+/–) 18...Ne4 (better is 18...dc4 19.Bc4 Ned5+=) 19.Be4+- de4 20.Nc3 Qd3 21.Qd3 ed3 (21...Rd3?? 22.Ne4 g6 23.Nf6+-) 22.Ne4 g6 (22...b6 23.Ng5 g6 24.Ne6 gh5 25.Nd8 (25.Nf8?! Rdf8 26.Rf8 Rf8+/–; 25.Rf8?! Rdf8 26.Nf8 Rf8+/–) 25...Kd8 26.Kh2 hg4 27.Rf4+-) 23.Nd6 (better is 23.Rf7 gh5 24.gh5+-) 23...Rd6 24.Bd6 Kd7 25.Be5 gh5 26.gh5 Bg7 27.Bg7 Rg7 28.e4 Rh7 29.Rf3 Rh5 30.Rd3 Kc7 (30...Ke8 31.Re3+-) 31.Rf1 Rh7 32.Rf6 Rg7 33.Re6 Ng6 34.Rf6 Ne5 35.Rd4 g4 36.Kg2 Nf3 37.Rdd6 Ng5 (37...Ne1 38.Kg3 Nc2 39.Rd3+-) 38.d3 Nf3 (38...Nf7 39.Rg6 Rh7 40.Rde6+-) 39.Kg3 Ne5 (39...Kb6 40.a4+-) 40.c5 Nf7 (40...Rh7 41.Rf5 Nd3 42.e5+- (42.Rd3?! Rh3 43.Kg4 Rd3+-)) 41.Rde6 Nd8 (41...Ng5 42.Re8+-) 42.Re5 Rd7 43.Kg4 Rd3 44.Re7 (44.Re7 Kc8 45.Rd6 Rd6 46.cd6+-) 1–0. vik – OtoXII, internet, 2001.

5.h4 f6 (5...h5 6.g5 Nc6 7.a3 e5 8.b5 ab5 9.Bb5 Bd6 10.d4) 6.a3 (6.h5 Bf7 7.d4 Nd7 8.a3 e5 9.de5 fe5 10.Bg2) 6...e5 7.Nc3 Bd6 8.d4 ed4 9.Qd4 c6 10.0-0-0.

(--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5).

4.a3 e6 5.Nf3 Nd7 6.c4 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

4.Nf3 Nd7 5.c4 e6 6.Be2 Ngf6 7.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7 7.Be2).

4.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.c4).

4.c4 e6 5.a3 Nf6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

4.c4 e6 5.Nf3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.c4 e6 5.Nf3).

5.c4 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

4.a3 b5 5.Bb5 Bd7 6.Nf3 Nf6 7.h3 (7.Bf6 ef6 8.Nc3 a5 9.Nd5 Bd6+-) 7...e5 (7...a5 8.ba5 e6 9.0-0+/–) 8.0-0 (8.Bc6 Bc6 9.Ne5 Bb7+-) 8...a6? (better is 8...e4!? 9.Bc6 Bc6+/–) 9.Bc6+- (9.Ne5 ab5 10.Nd7 Qd7 11.Bf6 gf6=+) 9...Bc6 10.Ne5 Qd6 11.d4 Bb5 12.Nc3 Bf1+= 13.Qf1 Be7 14.b5 0-0= 15.f4 Ne4 16.Ne4= de4 17.Nc4 Qg6 18.b6 cb6-/+ 19.Nb6?? Qb6-+ 20.Rb1 Qa5 21.c3 Ba3 22.Ba3?? Qa3 23.g3 Qc3 0–1. lokia – polypam (2035), net–chess.com, 2003.

4.a3 Qb8 5.b5 Nd8 6.Nf3 c6 7.Be2 cb5 8.Bb5 Nc6 9.0-0 a6 10.Bd3 Bd3 11.cd3 Qd6 12.Nc3 Qc5 13.Qb3 Na5 14.Qd5 Qd5 15.Nd5 Nb3?? (better is 15...Rc8+/–) 16.Nc7+- Kd8 17.Na8 Na1 18.Ra1 e6 (18...f6 19.Rc1+-) 19.Rc1 (19...f6 20.Rc7+-) 1–0. miehnekort – sapty_smiley, Yahoo, 2005.

4.a3 Ne5 5.d4?? (better is 5.Be5 f6 6.Bb2+-) 5...Ng4 (5...Nd7 6.Ne2=) 6.h3 (6.Nf3 e6=) 6...N4f6 7.c4 dc4 (7...e6 8.Nc3=) 8.Bc4 Bb1 (8...e6 9.Nc3=) 9.Rb1+= Ne4 (9...e6 10.Bd3+=) 10.Nf3 (10.Qa4 c6 11.b5 Qd6+-) 10...e6 11.0-0 Ngf6 12.Qc2 Bd6? 13.Bd3+- 0-0 14.Be4 Ne4 15.Qe4 b6 16.d5 ed5 17.Qd4 c5 18.Qg7 1–0. woschkat (2200) – islanderfan, net–chess.com, 2001.

4.a3= Nf6 5.Bb5 =.

4.b5 Na5 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Na5 4.e3 Bf5).

4.b5 Nb8 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Nb8 4.e3 Bf5).

4.Bb5 a6 5.Bc6= bc6 6.Nf3 (6.a3 f6=) 6...c5 (6...Rb8 7.Bc3=) 7.bc5+= Rb8 8.Bd4 Rb5 (8...f6 9.Nh4 Nh6 10.Nf5 Nf5 11.Bc3+=) 9.a4 (9.Nc3 Rb8+-) 9...Ra5 (9...Rb7 10.0-0+-) 10.Nc3 (10.Ne5!? Qa8 11.d3+-) 10...f6+= 11.Ne2 (11.Nh4 Nh6 12.Nf5 Nf5+=) 11...e5 12.Bc3 Rc5 13.d4 ed4 14.Nfd4 Bg4 15.Bb4 (15.f3 Bc8+=) 15...Rc4 16.Bf8 Kf8 17.f3 (17.h3 Be2 18.Ne2 Kf7+=) 17...Bh5?? (better 17...Bd7+=) 18.Ne6+- (18.Ne6 Ke8 19.Nd8+-) 1–0. GuestNYSY – GuestHHCS, freechess.org, 2017.

5.Nf3 Qd7 6.Be2 0-0-0 (6...Nf6 7.0-0=) 7.b5+= ab5 8.Bb5 e6 (8...Qd6 9.Nc3+=) 9.0-0 (9.Ne5 Qe8+/–) 9...f6 (9...Qd6 10.Nc3+=) 10.d4 (10.Nd4 Nge7+/–) 10...Bd6+= 11.Nbd2 Nge7 (11...Re8 12.c4+/–) 12.c4+/– h5? (better is 12...Bd3 13.Qa4 Kb8+/–) 13.c5 (13.Qa4 Kb8 14.c5 Bh2 15.Kh2 h4+-) 13...Bh2 14.Kh2 h4 15.Qa4 Qe8 16.Qb3 h3 17.g3 Qg6 18.a4 Bc2 19.Qc3 Be4 20.a5 Bf3 21.Nf3 Qe4 22.Be2 g5 23.Qd3 Qg6? 24.Qg6 Ng6 25.a6 ba6 26.Ra6 Kd7 27.Nd2 Ra8?! 28.Ra8 Ra8 29.Ra1 Ra1 30.Ba1 Nb4 31.Kh3 e5 32.Bh5 Ne7 33.de5 fe5 34.Be5 Nd3 35.f4 gf4 36.ef4 Nc5 37.Nf3 Ne4 38.Nd4 c5 39.Bg4 Ke8 40.Bh5 Kd7 41.Ne2 d4 42.Nd4 cd4 43.Bg4 Ke8 44.Bd4 Ng6 45.Bf5 Ng3 46.Kg3 Nf4 47.Kf4 Kd8 48.Ke5 Kc7 49.Kd5 Kb7 50.Kc5 Kc7 51.Be5 Kb7 52.Kb5 Ka8 53.Kc6 Ka7 54.Bd3 (54...Ka8 55.Kc7 Ka7 56.Bd4 Ka8 57.Be4#) 1–0. Kadziolka,Andrzej (2075) – Pertl,Nikola, Trinec op, 2001.

5.Nf3 Be4 6.d3 Bf3 7.Qf3 (worse 7.gf3 e5=) 7...e5 8.c4 d4 9.ed4 (9.Be2 Qh4+=) 9...ed4 (9...Nd4 10.Qb7 Nc2 11.Kd2 Na1 12.Qc6 Ke7 13.Ba1=) 10.b5 (10.Be2 Qh4+=) 10...ab5= 11.cb5 Na5 12.Nd2 Bc5 (12...c5 13.bc6 Nc6 14.Be2=) 13.Be2+= Ne7 14.Ne4 (14.Rc1 Bb6+=) 14...Bb6 15.0-0 c6 16.Ng5 0-0 17.Qe4 (17.bc6 Nac6 18.Rfc1 Nd5+=) 17...g6 (17...Ng6 18.Qg4=+) 18.a4 (18.bc6 Nac6 19.Qh4 h5+=) 18...Nd5 (18...Nf5 19.Bc1 Re8-/+) 19.Qh4+= Nf6 20.Bf3 Kg7 21.Rfe1 h6 22.Ne4 Ne4 23.Qe4 Re8 24.Qf4 Qc7? (better 24...Nb3 25.Rab1 Ra4 26.Re8 Qe8 27.bc6 bc6=+) 25.Bd4+- (25.Bd4 Kh7 26.Be5+-) 1–0. GuestGHVN – GuestVYKF, freechess.org, 2017.

5.Nf3 e6 6.c4 h6 (6...Nf6 7.cd5 ed5 8.b5=) 7.cd5 ed5 8.Be2 Nf6 9.0-0 Be7 10.d4 0-0 11.Ne5 Qe8 (11...Qd6 12.Nd2=) 12.Nc6 (12.Qc1 a5 13.ba5 Ra5 14.Nc6 Qc6 15.Qc6 bc6=) 12...bc6 (12...Qc6!? 13.Nc3 Qe6=) 13.Nd2+= Bd6 14.Nb3 Qe4 15.Nc5 Attacking the isolated pawn on a6 (15.Re1 Rfb8+=) 15...Bc5 (15...Qh4 16.g3 Qh3 17.Qd2= (17.Na6?? Be4 18.f3 Bg3-+)) 16.dc5+= Qh4 (16...Qe6 17.Qd4+/–) 17.Bf6 (better is 17.Qa4!? Bd7 18.Qa5+/– (18.Ba6 Ra7-/+)) 17...Qf6+= 18.Bd3 Rfe8 (18...Bd3 19.Qd3 a5 20.Rab1=) 19.Bf5+= Qf5 20.Re1 (20.Qa4 Re6+=) 20...Re6 (20...a5 21.Qd4=) 21.g3 g5 22.f4 (22.Qd2 g4+=) 22...Rae8 23.Qd2 h5 24.Qf2 g4 25.Qd2 Re4 26.Kf2 Rc4 27.Rac1 Ree4 28.Rc4 Rc4 29.Rc1 Rc1 30.Qc1 Qd3 31.Qb2 Kh7 32.Qe5 Qd2 ½–½. rayfranke (2515) – mpenga (2570), net–chess.com, 2016.

5.Nf3 e6 6.h3 Nce7 (6...Nf6 7.Nh4=) 7.d3 (7.Be2 Nf6=) 7...c5 (7...a5 8.Be2=) 8.bc5+= Nc6 (8...Qa5 9.Nbd2+=) 9.g4 Bg6 10.Nbd2 Nf6 11.d4 b6 12.Nb3 (12.c4!? bc5 13.Qa4+/-) 12...bc5= 13.Nc5 (13.dc5 Ne4=) 13...Bc5 14.dc5 Qa5 15.Qd2 Qc5 16.Rc1 (16.Bf6!? gf6 17.Rg1=) 16...Ne4-/+ 17.Qe2 0-0 18.Nh4 (18.h4 Rab8 19.c3-+) 18...Rab8-+ 19.Ng6? (19.c3 Ne5 20.Rd1-+) 19...fg6 (19...hg6?! 20.c3-+) 20.c3 (20.Ba1 Qa3 21.Rd1 Nf2 22.Qf2 Rf2 23.Kf2 Rf8 24.Ke2-+) 20...Rf2 21.Qa6 Qe3 22.Kd1 (22.Qe2 Re2 23.Be2 Rb2 24.Rh2 Re2 25.Re2 Qc1) 22…Qd2 0-1. oms (1670) - TransCanadaHighway (1650), Rated Classical game, lichess.org, 2013.

5.Nf3 Nf6 6.b5 Nb8 7.Nc3 =.

5.d4 Bd6 6.c4 Nf6 7.c5 Be7 8.Bd3 Bd3 9.Qd3 Ne4 10.Nd2 Nf2?? (better is 10...Nd2 11.Qd2 a6=) 11.Kf2+- Bh4 12.Ke2 (12.g3 Bg5+-) 12...Qg5 13.Kd1 (better is 13.Kf1+-) 13...Qg2+= 14.Qe2 Qh1 15.Kc2 Nb4?? (better is 15...Bf6+/–) 16.ab4+- Qg1 (16...a6+-) 17.Rg1 0-0 18.e4 de4 (18...g6 19.Qh5 Bf2 20.Rg2+-) 19.Ne4 (better is 19.Qg4 g6 20.Qh4+-) 19...a5 (19...f5 20.d5! e5 21.Be5 Rf7+-) 20.Qg4 Bf6 21.Nf6 Kh8 22.Qg7 1–0. slavisa10 – kilmer49, Live Game Caissa's Web, 2004.

5.Be2 Nf6 6.Nf3 Be7 7.d3 0-0 8.Nh4 Bg4?? (better 8...Bg6=) 9.Bg4+- Ng4 (better 9...g5 10.Nf5! ef5 11.Bf5 a5+-) 10.Qg4 Bh4 (10...Bf6 11.Bf6 Qf6+-) 11.Qg7 1–0. GuestMVHS – GuestTNVQ, freechess.org, 2017.

5.Na3 d4 6.Bd4 Qd6 7.Nc4 (better 7.Nf3+-) 7...Nc2= 8.Ke2?? (better 8.Qc2! Qd4 9.Qd1=) 8…Nd4 (8...Nd4 9.ed4 Qd4-+) 0–1. GuestXYWS – GuestQMPN, freechess.org, 2018.

5.d3 a6 6.a3 ab5 7.ab4 Ra1 8.Ba1 e6 9.Bc3 Nf6 10.Be2 Qa8 11.h3 Qa4 12.g4 Bg6 13.h4 h6 14.Qd2 Qa2 15.Qc1 Qa4 16.Qb2 Be7 17.Nh3 White intends g5 17...0-0 (17...d4 18.Bd4 (worse 18.ed4 Nd5+-) 18...Qb4 19.Qb4 Bb4 20.Nd2+-) 18.h5 Bh7 19.g5 hg5 20.Ng5 Ra8 21.Nh7 Kh7 22.h6! g6 (22...gh6 23.Bf6 Deflection) 23.Bf6 Bf6 (23...Qb4 24.Qb4 Bb4 25.Nd2 c5+-) 24.Qf6 (24.Qf6 Qb4 25.Nd2+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.d3 c5 6.a3 Qa5 7.ab4 Qb4 8.Bc3 Qb5 9.e4! Be6 (9...de4 10.de4 Combination) 10.ed5 Bd5 11.Nf3 Qc6 12.Be2 f6 13.0-0 e5 14.Bd2 Bd6 15.c4 Bf7 16.Nc3 Ne7 17.Be3 0-0 18.Nb5 a6 19.Nc3 (19.Nd6 Qd6 20.Nd2 b6+-) 19...b6 (19...Nf5 20.Ne4+/-) 20.Nd2+- b5?? (better 20...Qc7+-) 21.Bf3 Qb6 22.Ba8 Ra8 23.cb5 a5 24.Nc4 Qd8 25.Ne4 (25.Qf3 Rb8+-) 25...Bc7 (25...Nf5 26.b6+-) 26.Bc5 Nd5 27.Rb1 f5 28.Ng3 (better 28.Ned6 Nc3 29.Nf7 Qd5+-) 28...Nf4 (28...Nc3 29.Qc2 Nb1 30.Nf5+- (worse 30.Qb1 Qd7+-)) 29.Nf5 Nd3 (29...Qd3 30.Ne7 Kh8 31.b6 Qc4 32.bc7+-) 30.Be3 (30.Be7 Nf2 31.Bd8 Nd1 32.Bc7 Bc4 33.Rfd1 Be6 34.Ne7 Kf7+-) 30...Bc4 (30...Be6 31.Ncd6! Bd6 32.Qd3 Bf8+-) 31.Ng3 (better 31.Qg4 Qf6 32.Qc4 Qf7 33.Qd3+-) 31...Bb6? (better 31...Nb4+/-) 32.Qg4+- Be3 (32...Ba2 33.Rbd1 Be3 34.fe3 Bb3+-) 33.Qc4 Kh8 34.fe3 Nb4 35.b6! Qb6 36.Qe4 h6 (36...Qa6+-) 37.Qa8 Kh7 38.Qe4 (38.Rf8 Qc6 39.Rh8 Kg6 40.Rb4 Qa8 41.Rb6 Kf7 42.Ra8 h5 43.Ra7 Kg8 44.Nf5 Kh7 45.Rg7 Kh8 46.Rb8) 38...Qg6 39.Qg6 Kg6 40.Rb4! ab4 (40...ab4 41.Rf5 Combination) 41.Rb1 1-0. BeepBeepImAJeep (2770) - Alex32167 (2570), lichess.org, 2020.

5.d3 d4 6.a3 (6.ed4?! Nf6+=) 6...Nd5 (6...Bg4 7.f3 Nd5 8.fg4 Ne3+-) 7.e4 (7.ed4?! a6+=; 7.Bd4?! e6+/–) 7...Nc3 (7...Nh6 8.Bd4 e5 9.Bb2+- (9.ef5 ed4 10.Qe2 Be7+=)) 8.Bc3 dc3 9.ef5 Qd5 10.Nc3 (10.d4 Qf5 11.Nf3 g6+-) 10...Qf5 (10...Qe5 11.Nge2 Qf5 12.Qd2+-) 11.Qf3 Qe5 (11...Qf6 12.Qf6 Nf6 13.g3+-) 12.Nge2 0-0-0 (12...Rb8 13.d4 Qd6 14.a4+-) 13.Qf7 g6 (13...Nf6 14.g3+-) 14.d4! Rd4 (14...Qf6 15.Qf6 ef6+-) 15.Qf8 Kd7 (15...Rd8 16.Qf4 Qc5+-) 16.f4 Qe3 17.g3 Nf6 18.Bh3 Kd6 19.Qh8 Kc5 20.Qb8 Rc4 21.Qc7 1–0. Rosner,Dirk – Baier,Andreas, Tiger SC, 2000.

5.d3 d4 6.Bd4 Qd5 (6...Qd7 7.a3 e5 8.Bb2+/– (8.ab4?! ed4 9.ed4 Bb4 10.c3 Be7=; 8.Be5?! Qb5 9.Nf3 Na6+/–)) 7.c4 (7.a3!? e5 8.Bc3 Qb5 9.ab4 Bb4+-) 7...Qe6 8.a3 Nd3? (better is 8...c5 9.Nf3 Nd3 10.Bd3 Bd3 11.Qd3 cd4 12.Qd4 Nf6+/–) 9.Bd3+- Bd3 10.Qd3 Qg4 11.g3 Rd8 12.Qe2 Qg6 13.Nf3 Nf6 14.0-0 e6 15.Nbd2 b6 (15...Nd7 16.Nb3+-) 16.Ne5 Qf5 17.Qf3 (17.g4!? Qc2+-) 17...Qf3 18.Ndf3 Bd6 (18...Ne4 19.Nc6 Ra8 20.a4+-) 19.Nc6 Ra8 20.a4 a5 21.Rac1 0-0 22.Bf6 gf6 23.Rcd1 e5 (23...f5 24.Nfe5 Be5 25.Ne5+-) 24.Nh4 Rae8 25.Nf5 Re6 26.e4 h5 27.Rd3 Kh7 28.Nd6 Rd6 29.Rd6 cd6 30.Rd1 1–0. Hal1958 – Ippuli, playchess.de, 2005.

5.d3 d4 6.e4 Be6 7.a3 Na2 8.Nf3 Nc3 9.Nc3 dc3 10.Bc3 Nf6 11.Be2 a6 12.a4 Qd7 13.Bf6 (better is 13.0-0!?+-) 13...ef6+= 14.0-0 ab5 15.ab5 Ra1 16.Qa1 Qb5 17.Rb1 Qa6 18.Qa6 ba6 19.Ra1 Bc8 20.d4 Bb7 21.d5 (21.Ra6?! Ba6 22.Ba6 Bd6=) 21...f5 22.ef5 Bd5 23.Ra6 Bd6 24.Bb5 Ke7 25.Nd4 Kf6 26.g4 Rb8 27.c4 Bb7 28.Ra2 Kg5 29.f3?? (better is 29.h3=) 29...Bc5-+ 30.Rd2 Rd8 31.Kg2 Rd4 (< 31...Bd4 32.c5-+) 32.Rd4 Bd4 33.Be8 Kf6 (better is 33...Kf4 34.Kf1 Bf3 35.h3-+) 34.Kg3 (34.Bb5-+) 34...c6 (35.Bc6 Bc6-+) 0–1. hal1958 – trousersnake, HCL–A1530 playchess.de, 2003.

5.d3 Qd7 6.a3 Qb5 7.ab4 Qb4 8.Bc3 Qh4 9.Nf3 Qh5 10.Be2 f6? (better 10...Nf6+-) 11.Nd4 Qg6 (11...Qg5 12.h4 Qg2+-) 12.Bh5 Qh5 (12...Bd7 13.Bg6 hg6 14.Bb4+-) 13.Qh5 Bg6 (13...g6 14.Qf3 c6 15.Nf5 gf5 16.Qf5+-) 14.Qd5 e6 15.Ne6 (better 15.Qb7 Rd8 16.Qc6 Rd7 17.Ra7 Bd6+-) 15...Be7 16.Nc7 (16.Ng7!? Kf8 17.Ne6 Kf7 18.Nc7 Kg7 19.Na8 Bf7 20.Qb7 a6+-) 16...Kf8 17.Ne6 (17.Na8 a6+-) 17...Ke8 18.Ng7 Kf8 19.Ne6 Kf7 20.Nc7 Kg7 21.Na8 Bf7 22.Qb7 Nh6 23.Qe7 Ra8 24.Qf6 Kg8 (24...Kf8 25.Qh6 Ke7 26.Bb4 Kd8 27.Qd6 Kc8 28.Ba5 Kb7 29.Qd7 Kb8 30.Qc7) 25.Qg7 1-0. BeepBeepImAJeep (2595) – ogromariatorres, lichess.org, 2016.

5.d3 e5 6.Be5 Bd6?? 7.Bg7+- Be5 (7...Bg4 8.Qd2 (8.Bh8?! Bd1 9.Kd1 Nf6+-) 8...d4 9.Bh8 de3 10.Qe3 (10.fe3?? Qh4 11.g3 Bg3 12.hg3 Qg3 13.Qf2 Nc2 14.Kd2 Qf2 15.Ne2 Na1 16.Ba1 Bf3-+) 10...Kd7 11.Qd2+-) 8.Be5 f6 9.Bc3 Qd6 (9...c5 10.a3 d4 11.Bd2+-) 10.a3 a5 (10...Nc2 11.Qc2 Qb6 12.Bd4+-) 11.ab4 a4 12.g4 (12.Na3 h5+-) 12...Bg6 (12...Bd7 13.Na3+-) 13.Nf3 Ne7 (13...Qd7 14.Nd4+-) 14.g5 (better 14.Bg2 Rg8+-) 14...d4 (14...Rf8 15.h4+-) 15.Bd4 Nf5 (15...Rg8 16.gf6 Nf5 17.c3+-) 16.Bf6 Rf8 (16...0-0 17.c3 Ng7 18.Nbd2 Bd3 19.Nc4 Bc4 20.Bc4 Kh8 21.Qd6 cd6 22.Bd5+-) 17.c3 Rf6 18.gf6 Qf6 19.Ra4 Ra4 20.Qa4 Nh4 21.b6 c6 22.Qa8 Kf7 23.Qb7 Kg8 24.Nh4 Qh4 25.Qa8 Kg7 26.b7 Bh5 27.b8Q Qg4 (27...Kf6 28.Qd6 Kf5 29.Qa5 c5 30.Qac5 Kg4 31.Qf4) 28.Qe5 Kh6 (28...Kg6 29.Qc6 Qe6 30.Qce6) 29.Qf8 Qg7 30.Qfg7 (30.Qeg7) 1–0. Janek – Fipse, internet, 2017.

5.d3 e6 6.a3 Nc2 7.Qc2 h6 8.e4 de4 (8...Bg6 9.Nf3+-) 9.de4 Bg4 (9...Bh7 10.Nf3+-) 10.f3 Bh5 11.h4 (11.Nd2 Qe7+-) 11...Bg6 (11...Nf6 12.Ne2 Bg6 13.Nd2+-) 12.h5 Bh7 13.Be5 (13.Nd2 Qd6 14.Ne2 Nf6+-) 13...Rc8 (13...Nf6 14.Qc7 Qc7 15.Bc7+-) 14.Qa4 (14.Nd2 Qg5 15.Nc4 Nf6+-) 14...f6 (14...Qg5 15.b6 Ke7 16.Qb4 Ke8 17.Qc3 ab6 18.Ne2+-) 15.Bd4 b6 (15...Bd6 16.Nc3+-) 16.Nc3 e5 (16...Bd6 17.Rd1+-) 17.Be3 Bc5 (17...Bd6+-) 18.Bc5 bc5 (18...f5 19.Rd1 Qg5 20.Nh3 Qh4 21.Bf2 Qh5 22.Rd5 fe4 23.Bg3+-) 19.Rd1 Qd7 20.Rd7 (20.Rd7 Kd7 21.b6 c6 22.Qa7 Ke8 23.b7 Rb8 24.Qb8 Kf7 25.Bc4 Ke7 26.Qc7 Ke8 27.b8Q) 1–0. DEFFM – GuestZNTX, freechess.org, 2019.

5.d3 e6 6.a3 Nd3 7.Bd3 Bd3 8.cd3 Nf6 9.Nf3 Bd6 10.e4 (better is 10.0-0+-) 10...d4?? (10...de4 11.de4 Ne4 12.Bg7 Rg8+-) 11.e5 (< 11.Bd4 e5 12.Bc3 Qe7+-) 11...Bc5 (11...c5 12.Nbd2+-) 12.ef6 Qf6 13.0-0 0-0 14.Nbd2 e5 15.Ne4 Qe7 16.Nc5 Qc5 17.Re1 Qb5 18.Rb1 Qd7 19.Ne5 Qf5 20.Nf3 c5 21.Rc1 b6 22.Re5 Qf4 23.Qe2 h6 24.Re1 Qf6 25.Re7 Kh7 26.Qe4 g6 (27.Qg4 Kg7+-; 26...Qg6 27.Qg6 fg6 28.R1e6+-). sculp – KINGCOBRA, Live Game Caissa's Web, 2006.

5.d3 e6 6.a3 Qd7 7.ab4 Qb5 (7...Bb4 8.Nd2 Nf6 9.Rb1+-) 8.c3 f6 (8...Nf6 9.Nf3+-) 9.d4 (9.Nf3 Qd7+-) 9...Qc6 (9...Qb6 10.Nf3+-) 10.Nf3 Bd6 11.Be2 (11.b5 Qd7+-) 11...Ne7 12.0-0 0-0 (12...a6 13.b5! Qb6 14.c4 dc4 15.Bc4+-) 13.Bd3 (13.Nh4 Bb1 14.Qb1 a6+-) 13...Bg4 (13...Bd3 14.Qd3 e5 15.b5+-) 14.h3 (14.b5 Qe8+-) 14...Bh5 (14...Bf5 15.b5 Qd7 16.Re1+-) 15.Nbd2 (15.b5 Qb6+-) 15...e5 (15...Bg6 16.Bg6 Ng6 17.Qa4+-) 16.de5 fe5 (16...Bf3 17.Nf3 (17.gf3?! fe5 18.Qa4 a6+-) 17...Be5 18.Qc2+-) 17.Be2 (17.Ne5 Qe8 18.Nef3 a6+-) 17...Qd7? (better 17...e4 18.Nd4 Be2 19.Nc6 Bd1 20.Ne7 Be7 21.Rfd1 c6+-) 18.Ne5! Be5 (18...Qe6 19.Nef3+- (19.Bh5?! Qe5 20.g3 Bb4+-)) 19.Bh5 Qd6 (19...Qf5 20.Nb3 Bd6 21.c4 Bb4 22.Bf3+-) 20.Nf3 Bf6 21.Nd4 (21.Bg4 a6+-) 21...a6 22.Bg4 g6 (22...Bd4 23.ed4 Rae8 24.Re1+-) 23.Ne6 Rf7 (23...h5 24.Nf8 hg4 25.Ng6 Ng6 26.Qg4 Bg7+-) 24.Nd4 (24.Nc5 b6 25.Na6 Be5+-) 24...Rff8 25.Qc2 Nc6 26.Ne6 Rf7 (26...Rfe8 27.Nc5 Ne5 28.Nb7+-) 27.Nc5 b6 28.Ne6 (better 28.Na6 Ne5+-) 28...Ne5 29.Nd4 (29.Nf4 Ng4 30.hg4 c6+-) 29...Ng4 30.hg4 Re8 (30...Qd7 31.g5! Bg5 32.b5+-) 31.Rae1 (better 31.Ra6!? Bd4 32.ed4 Rfe7+-) 31...Qd7 (31...Re4 32.c4+-) 32.Qe2 (32.g5 Bg5 33.Ra1 Ra8+-) 32...a5 (32...c5 33.bc5 (33.Qa6?! cd4 34.cd4 Bd8+-) 33...bc5 34.g5 cd4 35.gf6 de3 36.fe3+-) 33.ba5 (33.b5 Bg7+-) 33...ba5 34.Ra1 a4 35.Qb5?? (better 35.Rfd1+-) 35...Qb5+= 36.Nb5 Rb8 (36...Rb8 37.Ra4 Rb5+=) 0–1. GuestFVWT – GuestYWPP, freechess.org, 2018.

5.d3 e6 6.a3 Nf6 7.ab4 Bb4 8.Nd2 0-0 9.Ngf3 Re8 10.Be2 e5 11.Ne5 Bd2 12.Qd2 Qd7 (12...a6+-) 13.Nd7 (13...Bd7 14.Bf6 gf6 15.Qc3 Bb5 16.Qc7+-) 1–0. orane (2205) – radi8288, Live Game Caissa's Web, 2004.

5.d3 Nf6 6.a3 Nc2 7.Qc2 b6 (7...e6 8.Nd2+-) 8.Nf3 e6 (8...Qd7 9.Nbd2+-) 9.Bf6 (better is 9.Qc6 Ke7 10.Be5+-) 9...Qf6 (9...gf6 10.Qc6 Ke7+-) 10.Qc6 Ke7 11.Qc7 Ke8 12.Qc6 Ke7 13.Qb7 Kd6 14.Qa8 Qa1 (14...Bg6 15.d4 a6+-) 15.Qd8 Kc5 16.d4 Qd4 17.ed4 1–0. orane (2000) – Dreamcrush, Live Game Caissa's Web, 2004.

5.d3 Nf6 6.a3 e6 7.ab4 Bb4 8.Nd2+-.

5.d3 Nf6 6.a3 Bg4 7.f3 Nd3 (7...Bd7 8.ab4 e6 9.Qd2+-) 8.Bd3 Bd7 9.Ne2 c6 (9...e6 10.Nbc3+-) 10.a4 (10.0-0 e6 11.Be5 cb5+-) 10...e5 (10...e6 11.Be5+-) 11.Be5 Bb4 12.c3 (better 12.Bc3 Bd6 13.0-0+-) 12...Qa5 (12...Qe7 13.bc6 bc6+-) 13.cb4 Qb4 14.Bc3 (14.Nbc3!? 0-0+-) 14...Qh4 15.Ng3 (15.g3 Qh6 16.Bd4 0-0+-) 15...cb5 (15...c5 16.0-0 0-0 17.Qd2+-) 16.Bb5 (16.ab5 Qg5 17.Kf2 0-0+-) 16...Bb5 17.ab5 Qc4 (17...Qg5 18.Kf2 0-0 19.Qd3+-) 18.Qe2 (18.Qd2 d4 19.Bd4 0-0+-) 18...a6 (18...0-0 19.Bf6 gf6 20.Nd2+-) 19.Qc4 dc4 20.0-0 (20.Nd2 0-0 21.ba6 Ra6 22.Ra6 ba6+-) 20...0-0 (20...Kd7 21.Rd1 Ke6 22.e4+-) 21.Bf6 gf6 22.ba6 ba6 (22...Ra6 23.Ra6 ba6 24.Rc1+-) 23.Nc3 Rfd8 (23...a5 24.Ra4+-) 24.Nge4 (24.Ra4 Rab8+-) 24...Rd3 (24...f5 25.Nf6 Kh8 26.Nfd5+-) 25.Kf2 (25.Nf6 Kf8 26.Rfc1 Rc8+-) 25...Rad8 (25...f5 26.Nf6 Kg7 27.Nfd5+-) 26.Nf6 Kg7 27.Nfe4 (27.Nce4!? Rb3+-) 27...f5 28.Ra6 (better 28.Nc5 Rd2 29.Ne2 Rb8+-) 28...fe4 29.Ne4 c3 (29...Rb8 30.Rc1 Rb2 31.Kg3+-) 30.Rc1 Rb8 (30...h5 31.f4+-) 31.Rc3 Rc3 (31...Rd7 32.Kg3+-) 32.Nc3 Rb2 33.Kg3 Rc2 (33...h5 34.Ra2 Rb8 35.Nd5+-) 34.Ne4 1–0. GuestMPZD – Zendrome, freechess.org, 2019.

6.Ke2 Na1 7.Ba1 d4 8.Ke1 (8.Bd4 e5! 9.Be5 Qd3 10.Ke1 Qb1 11.Qb1 Bb1-+) 8...de3 (better is 8...e5 9.ed4 ed4 10.Bc4-+) 9.de3 (9.fe3 Nh6 10.Nf3-+) 9...Qd1 10.Kd1 e6 (10...Bb1 11.Kc1 Bf5 12.Ne2-+) 11.Be2?? (11.Nd2-+) 11...Bb1 12.Bf3 (12.Bb2 Be4 13.f3 Rd8 14.Kc1 Bd3-+) 0–1. annmarie – geimbcke, Live Game Caissa's Web, 2004.

6.Ke2 Na1 7.Ba1 Qd7 8.Ke1 c6 9.bc6 bc6 10.Nf3 Rb8 11.Nc3 e6 12.a4 Bb4 13.Ne2 Ba3 (13...f6 14.Ng3-+) 14.d3? (better is 14.Bg7 Rb1 15.Qb1 Bb1 16.Nc3-/+) 14...Bb4 15.Nd2 Bd2 (15...Bd3?! 16.Bg7 Nf6 17.Bf6=) 16.Kd2 Nf6 (16...f6 17.Qc2-+) 17.g3 (17.Ng3 Bg6-+) 17...0-0 18.Bg2 c5 19.Qc1 (19.Bf6 gf6 20.Qa1 Rfc8-+) 19...Qa4 20.Rd1 (20.Bf6 gf6 21.Nc3 Qb4-+) 20...c4 (better is 20...Qa2!? 21.Qc2 Qc2 22.Kc2-+) 21.Bf6 gf6 22.e4 cd3 23.Nc3 Qa5 24.ef5 d4 25.Kd3 dc3 (worse is 25...Qc3 26.Qc3 dc3 27.Kc3 Rfc8 28.Kd2 Rb2 29.Ke3 Rc3 30.Kd4-+) 26.Qc3 (26.g4 Rb2 27.Ke3 Qc5 28.Rd4-+) 26...Rfd8 27.Kc2 Qc3 (27...Qc3 28.Kc3 Rd1 29.fe6 fe6-+; 27...Qa2 28.Kc1 Rb1) 0–1. Valpa – Evets, playchess.de, 2005.

6.Ke2 Na1 7.Ba1 e6 8.Nf3 Nf6 9.Ke1 Be7 10.d3 Qd6 11.Be2 0-0-0 12.g3 Qb6 13.Qb3 h6 14.d4 g5 15.Bc3 Be4 16.Rg1 Ng4 17.h3 Nf6 18.a4 a6 19.Nbd2 ab5 20.ab5 c6 21.Qa3?? Ba3-+ 0–1. Fournier,Frederic (1820) – Astronotus (1790), Active (4/0), 2004.

6.Ke2 Qd7 7.d3 Na1 8.Nc3 Nb3! 9.Qb3 e6 10.f3 (10.Nf3 Nf6-+) 10...Nf6 11.e4 de4 12.fe4 Bg6 (12...Bg4 13.Nf3-+) 13.g3 (13.Nf3 Rd8 14.Ke1 Bh5-+) 13...Bd6 (13...Rd8 14.Kf3-+) 14.Bh3 (14.Nf3 Bh5-+) 14...0-0 (14...Be5 15.Nf3 Bh5 16.Rf1-+) 15.Nf3 Qe7?? (better 15...Bh5-+) 16.e5-/+ Nd7 (16...Bd3 17.Kd3 Be5 18.Ne5 Qd6 19.Kc2 Qe5 20.Bg2 Qf5 21.Kc1-+) 17.ed6 cd6 18.Ne4 d5 19.Qc3 (19.Nf2 Rac8-/+) 19...f6 20.Ned2 Rac8 (better 20...Nc5 21.d4 Nd3-/+) 21.Qb3? (better 21.Qb4!? Qf7 22.Bd4-/+) 21...Nc5-+ 22.Qb4 Bd3 23.Kf2 b6 24.Ne1 (24.Re1 Rc7-+) 24...Bg6 25.Nef3?? (25.Rf1 Rfe8-+) 25...Qd6 (better 25...Nd3 26.Kg2 Nb4 27.ab4 Rc2-+) 26.Kg2 Rce8 27.Nd4 Qc7 28.Re1? (better 28.Rd1-+) 28...e5 (28...Nd3 29.Rc1 Nc1 30.Ne6-+) 29.N4f3 (29.Rc1 ed4 30.Bd4 Re2 31.Kg1 Qe7-+) 29...Nd3 30.Rc1 (30.Qc3 Qc3 31.Bc3 Ne1 32.Ne1-+) 30...Nc1 31.Bc1 Qc1 32.Qd6 (32.Bd7-+) 32...e4 33.Qd5 (33.Be6 Kh8 34.Qb4 ef3 35.Nf3 Be4-+) 33...Kh8 (better 33...Bf7 34.Qe4 Re4 35.Ne4-+) 34.Nh4 Rd8 35.Ng6 hg6 36.Qe4 (36.Bd7 e3 37.Nf3-+) 36...Rd2 37.Kf3 Qc3 (37...Qd1 38.Ke3 Qe1 39.Kf4 Rf2 40.Qf3 Qe5 41.Kg4 Qg5) 38.Kf4 Rd4 (38...Rf2 39.Kg4 f5 40.Qf5 gf5 41.Kh5 Rh2 42.Kg5 Qg3 43.Bg4 Qg4) 39.Qd4 (39.Bg2 Qd2 40.Kg4 f5 41.Kh3 Qh6 42.Qh4 Rh4 43.gh4 Qe3 44.Bf3 Qf3) 39...Qd4-+ 40.Kf3 Qd3 (40...Re8 41.Bf1 Qd2 42.Kg4 Qd1 43.Kh3 Qf1 44.Kh4 Re4 45.g4 Qf2 46.Kh3 Re3) 41.Kg2 (41.Kf2 Qd2 42.Kf1 Re8 43.Kg1 Re1 44.Bf1 Qe2 45.h3 Rf1) 41...Qe2 42.Kh1 (42.Kg1 Rd8 43.Bf1 Rd1 44.h3 Rf1) 42...Rd8 43.Kg1 (43.Bg2 Rd1 44.Bf1 Qf1) 43...Rd1 44.Bf1 Qf1 (44...Rf1?!=) 0-1. MADIBoo - gorun_run (1745), Rated Classical game, lichess.org, 2013.

5.Be5 f6 6.Bb2 c5 7.c4 dc4 8.Bc4 Nh6 9.Nf3 Bb1 (9...e5 10.Nc3+-) 10.Qb1 a5 (10...Qd7 11.0-0+-) 11.Qe4 f5 (11...Qd7+-) 12.Qb7 Rb8 (12...Qc8 13.Qc8 Rc8 14.Ne5+-) 13.Qc6 Qd7 14.Be6 Qc6 15.bc6 Rb6 16.c7 Rc6 17.Be5 Rc7 (17...g6 18.Rb1 Re6 19.c8Q Kf7 20.Ng5 Kg8 21.Qe6 Nf7 22.Qf7) 18.Bc7 g5 (18...g6 19.Rb1 Nf7 20.Rb8 Nd8 21.Rd8) 19.Rb1 Bg7 (19...Nf7 20.Rb8 Nd8 21.Rd8) 20.Rb8 1–0. DEFFM – GuestSPWQ, freechess.org, 2020.

5.Be5 f6 6.Bb2 Qd6 (6...e5 7.c4+-) 7.Ba3 Qe5 (7...Qd7 8.Nf3+-) 8.Nc3 0-0-0 (8...Nh6 9.Nf3 Qe6 10.Nd4+-) 9.Nf3 Qe6 10.Nd4 Qd7 11.Nf5 Qf5 12.Na4 (12.Bc5 Kb8+-) 12...e5 (12...Nh6 13.Bd3 Qg5 14.0-0+-) 13.Bf8 Rf8 14.c4 d4 (14...dc4 15.Rc1+-) 15.Nc5 Nh6 (15...e4 16.ed4 b6 17.Nb3+-) 16.Bd3 (better 16.Qa4 de3 17.de3+-) 16...Qg5 (16...e4 17.Ne4 Qe5 18.0-0+-) 17.Qf3 (better 17.h4 Qg2 18.Be4+-) 17...Re8 (17...e4 18.Ne4 Qe5+-) 18.Qb7 Kd8 19.Qd5 (19.Qd5 Ke7 20.Qe6 Kd8 21.Qd7) 1–0. GuestDHSR – GuestRXYY, freechess.org, 2018.

5.a3 0-0-0 6.Nf3 Nb4 (6...f6 7.0-0=) 7.Nd4+= a6?? (better is 7...Nc2 8.Nc2 Qg6+=) 8.Nf5+- Qg6 (8...Qb6 9.ab4 (9.Bg7?! Bg7 10.Ng7 Qf6+/–; < 9.Ng7 Bg7 10.Bg7 Qg6 11.Bh8 Nc2 12.Kf1 Na1+-) 9...Qb5 10.Ng7 Qb4 11.Bc3+-) 9.ab4 ab5 10.Ng3 (10.Nh4 Qe4 11.Nf3 f6+-) 10...f6 (10...e6 11.Bc3+-) 11.0-0 e6 12.Ra8 (12.c3 Bd6+-) 12...Kd7 13.Ra5 c6 14.c3 Bd6 15.d3 Ne7 16.e4 Ra8 17.Ra8 Ra8 18.Re1 Ra2 (18...Bg3 19.fg3 de4 20.Re4+-) 19.Qb3 (19.Ba3!? Be5 20.Qb3 Ra1+-) 19...Ra8 20.Nd2 e5 (20...Bg3 21.fg3 e5 22.d4 ed4 23.cd4+-) 21.Nf3 de4 22.de4 h5 (22...Qg4 23.Qd1 Qe6 24.Re2+-) 23.Rd1 Kc7 24.Qe6 (24.c4 h4 25.c5 Bc5 26.Nh4 Bf2 27.Kf2 Qe8+-) 24...Rd8 25.Rd6! Qe8 (25...Rd6 26.Qe7) 26.Rd8 Qd8 27.h3 1–0. Wall,Bill – Herugil, internet, 2003.

5.Nc3 a6 6.Bc6 Qc6 7.Nf3 e6 (7...Qd6!?+=) 8.Nd4+= Qb6 (8...Qd7!? 9.Nf5 ef5+=) 9.Nf5+/– ef5 10.Nd5 Qd6 11.c4 Nf6? (better is 11...Ne7!? 12.Ne7 Qe7+/–) 12.Bf6+- gf6 13.f4 (13.Rb1 c6 14.Nb6 Rd8+-) 13...c6 (13...Rg8 14.Qc2 c6 15.Nb6+-) 14.Nb6 Rd8 15.c5 Qe6 16.a3 h5 (16...Rg8 17.0-0+-) 17.0-0 Qe4 18.Rf2 Rg8 (18...h4 19.Na4+-) 19.Qh5 Rd2 (19...Rg4+-) 20.Rd2 Qe3 21.Rf2 Be7 (21...Bc5 22.bc5 Kf8 23.Qh6 Ke7 24.Kf1+-) 22.Qf5 Kf8 23.Qc8 (23.Qh7!? Qd4 24.Re1 Rg7 25.Qh8 Rg8 26.Qh6 Ke8+-) 23...Kg7 24.Qb7 f5 (24...Qc3 25.Rff1 Qe3 26.Kh1+-) 25.Qc6 Kh7 (25...Bh4 26.g3+-) 26.Qf3 (26.Qd5 Bh4 27.g3 Kh6+-) 26...Qd4 (26...Qf3 27.Rf3 Rd8 28.Rc1+-) 27.Rd1 (27.Rd1 Qh8 28.Qb7+-) 1–0. marus1 – hitjosh, internet, 2001.

4.a3 Qc6 5.d3 e6 6.Nd2 (6.Nf3 Nh6+=) 6...Nd7 (6...a5 7.Ngf3=) 7.Ngf3 (7.c4 Ngf6=) 7...Bg4 8.Be2 Bf3 (8...Ngf6 9.c4+=) 9.Nf3 Qa6 (9...Ngf6 10.c4+=) 10.0-0+- Ndf6 (10...Ngf6 11.e4+-) 11.c4 Ng4 (11...dc4 12.dc4 Rd8 13.Qc2+-) 12.cd5 (12.Qc2 Ne7+-) 12...ed5 13.d4 (13.Rc1 c6+-) 13...Qh6 (13...Qd6 14.Qa4 c6 15.Rac1+-) 14.h3 (14.Qa4 c6+-) 14...N4f6 15.Ne5 Bd6 16.Qa4 c6? (better 16...Kf8!?+-) 17.Nc6!+- Kf8 (17...bc6 18.Qc6 Double attack) 18.Ne5 (18.Na7?! Bb8+=) 18...Be5 (18...Ne7 19.Rac1+-) 19.de5 Ne4 (19...Ne8 20.Bd4+-) 20.Rac1 Ke7 (20...Ne7 21.Rc7+-) 21.Rc7 Ke6 (21...Kf8+-) 22.Qd7 1–0. GuestNMSB – Athief, freechess.org, 2016.

4.a3 Nc6 5.Nf3 Qc5?? 6.bc5+- b6 (6...e6 7.Bb5+-) 7.Bb5 bc5 8.Bc6 Kd8 9.Ba8 e5 10.Ne5 f6 11.Nf7 Ke7 12.Nh8 Nh6 13.Qf3 Bc2 14.Qd5 Ng4 15.Bc6 a5 (15...Bf5 16.Qf5 Ne5 17.Be5 fe5 18.Qe5 Kd8 19.Qe8) 16.Qd7 1–0. GuestWWFF – GuestBKHK, freechess.org, 2018.

4.a3 d4 5.Bd4 (5.Qf3 A) 5...Bc2?? 6.Qb7 (6.Bd4?! c6=) 6...Be4 7.Qe4+-; B) 5...Bc8 6.Bd4 Nf6+-) 5...e5 (5...Qg6 6.d3+-) 6.Bb2 (6.Qf3 Nc6 7.Qf5 ed4+-) 6...Qd5 (6...Nc6 7.Nf3 e4 8.Nd4 Nd4 9.Bd4+-) 7.c4 (better 7.Nf3 Nd7 8.Nc3+-) 7...Qc4?? (better 7...Qe6+-) 8.Bc4+- b6 (8...Nc6 9.b5 Na5 10.Ba2+-) 9.Qb3 (better 9.Qf3 c6 10.Qf5 Kd8+-) 9...a5 10.Bf7 ½–½. DEFFM – Kanzil, freechess.org, 2016.

4.a3 Nd7 5.Nf3 c6 6.Nd4 Bg6 7.Be2 e5 8.Bg4?? (better is 8.Nf3=) 8...ed4-+ 9.Bd7 Qd7 10.Bd4 f6 11.0-0 Bd6 12.Re1 Nh6 13.h3 0-0 14.d3 Nf7 15.e4 (15.Nc3 b6 16.Ne2 Ng5-+) 15...de4 16.de4 Rad8 17.Nc3 (17.c3 b6 18.Qc2 c5-+) 17...Bb8 18.Bc5 (18.Ne2 Qd6 19.f3 Qh2 20.Kf1-+) 18...Qc7 19.Bf8 (19.Qf3 Qh2 20.Kf1 Ng5-+) 19...Rd1 20.Rad1 (20.Nd1 Qh2 21.Kf1 Kf8-+) 20...Kf8 (better is 20...Qh2 21.Kf1 Bh5 22.f3 Bf3 23.Re2-+) 21.g3 Bh5 22.Rd2 (22.Ne2 Ng5 23.Rd3 Qc8-+) 22...Ne5 23.Kf1 (23.Kg2 Nf3 24.Red1 Nd2 25.Rd2 Qe5-+) 23...Nf3 24.Red1 Nd2 25.Rd2 Ke7 26.Rd3 Bf7 27.Re3 (27.Kg2 b5 28.Nd1 Bc4-+) 27...a6 28.f4 (28.Kg2 Ba7 29.Rf3 Bc4-+) 28...Qb6 (better is 28...Ba7!? 29.Ke2-+) 29.Nd1 Ba7 30.Ke2 Qb5 31.Kf2 Qc4 (31...Qc4 32.Ke1 Qc2-+) 0–1. Raffer,Rene – Strobel,M (2090), 24th Feffernitz Open, 2015.

4.a3 e5 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.e3 Bf5).

4.b5 e5 5.a4 (5.Nf3 Nd7=) 5...Nf6 (5...Nd7 6.Nf3=+) 6.c4 (6.a5 a6=+) 6...c5 (6...Nbd7 7.Nf3=+) 7.cd5 Nd5 8.Nc3 (8.Qf3 Be6=) 8...Nb4 9.e4 Be6 10.d3 (10.Nf3 Be7=+) 10...Be7-/+ 11.Nf3 Bg4 12.Rc1 (12.Be2 Bf3 13.gf3 0-0-/+) 12...Bg5 (12...0-0 13.h3 Bf3 14.Qf3-/+) 13.Rb1 Bf3 (13...0-0 14.h3 Bf3 15.Qf3-/+) 14.gf3 (14.Qf3!? 0-0 15.Be2=+) 14...0-0-/+ 15.Ba3 a5 16.Bb4 ab4 17.Nd5 Nd7 18.Rg1 Bd8 19.Ne3 g6 20.Nc4 Qd4 21.Nd2 Bh4-+ 22.Qe2 Ra4 23.Bh3 Nf6 24.Kf1 Rd8 25.f4 Ra2 26.fe5 Qe5 27.Ke1 Qc3 28.Bf1 h6 29.Rd1 b3 30.e5 Re8 (31.ef6 Re2 32.Ke2 Qe5 33.Kf3 Qf5 34.Kg2 Qg4 35.Kh1 Qd1-+) 0–1. Zylla – Westphal, BSF–VM Winterturnier, 1996.

4.b5 Qg6 5.d3 =.

4.Nf3 Qb4=+ 5.Ba3 (5.Bc3 Qc5=+) 5...Qa5 6.c4 (6.Nd4 Be4=+) 6...Nf6 (6...dc4 7.Bc4 b5-/+) 7.Qb3=+ Qb6 8.Nc3 dc4 (8...e6 9.Bf8 Rf8 10.d4=+) 9.Bc4 Qb3 (9...e6 10.Bf8 Rf8 11.d4=+) 10.ab3 c6 11.Ng5 (11.Nh4 Bg4=+) 11...e6 12.Bf8 Kf8 13.e4 Bg6 14.f4 (14.Be6 fe6 15.Ne6 Ke7 16.Nc7-/+) 14...h6-/+ 15.f5 ef5 (15...Bh5!? 16.Na4 hg5-+) 16.ef5-/+ hg5 (16...Bh5 17.Nge4 Ke7 18.Nf6 Kf6 19.Ne4 Kf5 20.Ng3 Ke5 21.Nh5+-) 17.fg6=+ Nbd7 18.0-0 Ne5 19.gf7 b5 20.Be6= Ke7 21.Rae1+/– Kd6 22.d4+- Nd3 23.Re3 Nf4 24.d5 b4= 25.Rd1 bc3-/+ 26.dc6 Kc7 27.Bd7 c2 28.Rf1? Rhf8 29.g3 N4d5 30.Rd3? Rf7 31.Be6 Nb4 32.Rd4 Re7 33.Bf5 a5 34.Rc4 Re2 35.Rc1 Rd8 36.Bc2 Na2 37.Ra1 Nb4 38.Bf5?? Rd5 39.Bh3 Nc2 40.Rc1 Rdd2 41.Bf1 Rh2 42.Ra4 Nh5 43.Rg4 Ne3 44.Re1 Ng4 (45.Re7 Kc6-+) 0–1. Martinez Rodriguez,Ezequiel – Arias Torio,Sergio (2095), Asturias–ch, 2001.

4.Nc3 Ngf6 5.Bb5 (5.Nf3 e5=+) 5...c6 (5...e6 6.a3-/+) 6.Ba4 (6.Be2 e5 7.a3 Bd6-/+) 6...b5 7.Bb3 e6 (7...a5 8.ba5 e5 9.Nce2-/+) 8.a4 Bb4 (8...ba4 9.Ba4 Qb6 10.Ba3=+) 9.ab5 Bc3 10.Bc3 cb5 11.Ra5 (11.Nf3 a5=+) 11...a6 (11...Ne4 12.Qa1-/+) 12.Nf3 h6 (12...Nc5 13.0-0=+) 13.0-0 (13.Nd4 Bg6=) 13...0-0 (13...Bg4 14.Qa1 Bf3 15.gf3=+) 14.Qa1 Qb6 15.Bd4 Qc6 16.c3 Rfe8 17.Bf6= Nf6 18.Ne5 Qd6 19.d4 Re7 20.Rc1 Rea7 21.c4 dc4-+ 22.Bc4 bc4 23.Nc4 Qc6 24.Nd2 Qd7 25.Nf3 Rc7 26.Ne5 Rc1 27.Qc1 Qc8 28.Rc5 Qe8 29.h3 Nd7 30.Rc4 Ne5 31.de5 a5 32.Rh4 Qc8 33.Qd1 Qc2 34.Qf3 Rd8 35.g4 Be4 36.Qf4 Qd1 37.Kh2 Qh1 38.Kg3 Qg2# (38...Qg1#) 0–1. tschulz – Joschi, internet, 2004.

4.c4 Bb1 5.Qb1 Ngf6 6.Nf3 e6 7.a3 Be7 (7...Bd6 8.c5 Be7 9.Be2+=) 8.d4 Nb6 (8...dc4 9.Bc4 0-0 10.0-0+=) 9.Qc2 (9.c5 Nbd7+=) 9...dc4 10.Bc4 Nc4 11.Qc4 0-0 12.0-0 c6 13.Rad1 (13.Rfc1 Qb6=) 13...Qc7 (13...a5 14.ba5 Qa5 15.Rd3=+) 14.a4 White plans b5 14...a6 15.b5 (15.Bc3 Qd6=) 15...ab5=+ 16.ab5 Nd5 (16...Qb6 17.bc6 Qb2 18.Rb1=+) 17.bc6 bc6 (17...Qc6 18.Qc6 bc6 19.Ra1=) 18.Rc1 Rfc8 19.Ne5 The isolani on c6 becomes a target 19...Bd6 20.Nc6 (20.e4 Nf6=) 20...Bh2 (20...Qb7 21.Na5 Qb2 (worse 21...Rc4 22.Nb7 Bh2 23.Kh2+=) 22.Qc8 Rc8 23.Rc8 Bf8-+) 21.Kh1= Kf8 (better 21...Bd6 22.e4 Nb6=) 22.Qc5?? (22.Qd3 Kg8 23.e4+/-) 22...Ke8?? (better 22...Bd6 23.Qb5 Qd7-/+) 23.e4 (23.Qb5 Kf8 24.e4 Bf4 25.ed5 ed5+-) 23...Bd6 24.Qc4 (24.Qb5!? Qb6 25.Na7 Qb5 26.Nb5+-) 24...Nb6 (24...Ne7!? 25.d5 Bf4=) 25.Qb5+/- Kf8 (25...Nd7 26.d5 Qb6 27.Qb6 Nb6 28.de6 fe6 29.Bg7 Bf4+=) 26.Rc2?? (better 26.e5 Nd5 27.ed6 Qd6 28.Ne5+-) 26...Na4= 27.Rfc1 (better 27.Bc1!?=) 27...Nb2-/+ 28.Rb2 (better 28.e5 Ba3 29.Ra1=+) 28...Bf4 (better 28...Ba3!?-/+) 29.Rc5 Ra1 30.Rb1 Rb1 31.Qb1 Rb8?? (31...Ra8 32.g3 Bd6 33.Rc3=) 32.Qd1 White plans d5 (better 32.Qb8 Qb8 33.Nb8 Bb8 34.Rc8 Ke7 35.Rb8+-) 32...Qb6? (32...Rb6 33.Qc2 Qb7 34.g3+=) 33.g3?? (33.Nb8 Qb8 34.Qc2 Ke7+-) 33...Bd6? (33...Qb1 34.Qb1 Rb1 35.Kg2+=) 34.Rc2?? (better 34.Nb8 Qb8 35.Rc6+-) 34...Rc8 (34...Ra8 35.Kg2=) 35.d5+= ed5 (35...h6 36.Kg2+=) 36.ed5 (36.Qd5 Qb1 37.Kg2 Qc2 38.Qd6 Kg8 39.Ne7 Kh8 40.Nc8 Qc8+=) 36...Re8 37.Kg2 g6 (37...Ra8 38.Qf3=) 38.Re2+= Ra8 39.Qd2 Kg7 (39...Qc5 40.Re4=) 40.Qe3 (40.Qc3 Kg8 41.Qf6=) 40...Bc5?? (40...Qe3 41.Re3 Ra2 42.Rd3=) 41.Qf3 (41.Qc3 f6 42.Rb2 Qc7 43.Qc5 Qd7+-) 41...h5?? (41...Ra3 42.Qf4+=) 42.Ne5 (better 42.Qc3 Kh7 43.Rb2+-) 42...Qc7 (42...Ra7 43.Rc2+=) 43.Qf4 (better 43.Nf7!? Ra3 44.Ng5 Rf3 45.Ne6 Kf7 46.Nc7+/-) 43...Bd6 (43...Rd8 44.Ng6 Qb7 45.Ne5 Qd5 46.Kh2=) 44.Qd4+= Kh7 (44...Bc5 45.Qc4 Qd6 46.Nf7 Kf7 47.Re6+-) 45.Nf3 (better 45.Nc6+=) 45...f5?? (better 45...Qd8!?=) 46.Ng5 (46.Re6!? Rf8 47.Nh4+-) 46...Kh6+/- 47.Ne6 Qe7 (47...Qd7 48.Qf6+/-) 48.f4 (48.Qd2 f4+-) 48...h4 (better 48...Qd7+/-) 49.Qd3 (better 49.gh4 Rc8 50.Ra2+-) 49...hg3?? (better 49...Ra3 50.Qd4 Rg3 (50...hg3?? 51.Qh8 Qh7 52.Qb2+-) 51.Kh2 Ra3=) 50.Qg3+- Kh5 (50...g5+-) 51.Qh3 (51.Qf3 Kh6 52.Qh3 Qh4 53.Qh4) 51...Qh4+- 52.Ng7 Kh6 53.Qh4 (53.Nf5 gf5 54.Qh4 Kg7 55.Qg5 Kf7 56.Qf5 Kg8 57.Qg6 Kf8 58.Qd6 Kg7 59.Re7 Kg8 60.Qg6 Kf8 61.Qf7) 53...Kg7 54.Re7! Be7 55.Qe7 Kg8 56.d6 Ra2 57.Kf3 (57.Kg3 Rd2 58.d7 Rd3 59.Kh4 Rd4 60.Kg5 Rd7 61.Qe8 Kg7 62.Qd7 Kf8 63.Kg6 Kg8 64.Qe8) 57...Ra3 58.Ke2 Ra2 59.Kd3 Ra3 60.Kc4 (60.Kc4 Rh3 61.d7 Rc3 62.Kc3 g5 63.d8Q) 1-0. upep (1680) - seagul (1780), Rated Classical game, lichess.org, 2013.

4.d3 e5 5.a3 Ngf6 6.c4 c6 7.Qc2 Bd6 8.c5 Bc7 9.Nd2 0-0 10.Ngf3 Qe7 11.e4 Bg6 12.g3 a5 13.Bg2 ab4 14.ab4 Ra1 15.Ba1 Ra8 16.0-0 Nf8 17.Bb2 N6d7 18.Nh4 Qe6 19.f4 ef4 20.gf4 (< 20.Ng6 Ng6 21.ed5 cd5-/+) 20...Qg4 21.Ng6 Ng6 (< 21...Qg6 22.ed5 cd5 23.Kh1+=) 22.f5 Nf4 23.Nf3 Ra2 (23...Ng2?! 24.Qg2 h5 25.Rf2+=) 24.Ra1? (better is 24.Rb1-+) 24...Ra1 (better is 24...Ng2 25.Qg2 Qg2 26.Kg2 Rb2 27.Kf1 de4 (27...Bh2?! 28.ed5 cd5 29.Nh2-+) 28.Ra8 Nf8 29.de4 Rb4-+ (< 29...Bh2 30.e5 Bg3 31.e6 fe6 32.fe6 Rf2 33.Kg1-+)) 25.Ba1=+ h5 (< 25...Ng2 26.Qg2 Qg2 27.Kg2+=) 26.Kf1 de4 27.de4 f6 28.Qf2?? (better is 28.Bh1=) 28...Ng2-+ 29.Qg2 Qe4 30.Bd4 Qf5 31.Kg1 (better is 31.Qa2 Kf8 32.Qf2-+) 31...Qb1 32.Qf1 Qb4 33.Qh3 Qb1 34.Kg2 Qc2 35.Bf2 Qg6 36.Bg3 Bg3 37.Qd7 Bd6 38.Kh1 Bc5 39.Qb7 Qe4 40.Qc8 Kh7 41.Qh3 Qg4 (better is 41...Kh6!? 42.Qf1 g5 43.Kg2-+) 42.Qf1 Qe4 (better is 42...g6-+) 43.Qh3 Kh6 44.Qg2 g5 (44...Qb1 45.Ng1-+) 45.h3 (45.Nd2 Qe1 46.Qf1 Qf1 47.Nf1-+) 45...Qb1 46.Kh2 (46.Ng1-+) 46…Bd6 (47.Qg3 Qb2 48.Kh1 Bg3 49.Kg1 Qf2 50.Kh1 Qf3 51.Kg1 Qf2 52.Kh1 Qf1#) 0–1. Rempe,Torge – Hintz,Bastian (1710), Schleswig Holstein–chA U16, 2000.

4.Bd3 Bd3+= 5.cd3 e5 6.a3 Ngf6 7.Ne2 Bd6 8.Nbc3 c6 9.d4 0-0 10.h3 (10.de5 Ne5 11.d3 Qd7+=) 10...Re8 11.Qc2 Nb6 (11...e4 12.d3-/+) 12.de5+= Be5 13.d3 d4 14.ed4 Bd4 15.0-0 Be5 16.Rad1 Qd7 17.Ne4 Bb2 18.Qb2 Nbd5 19.Nc5 Qe7 20.Rfe1 Rad8 (20...a5 21.d4+=) 21.Kf1 (21.Qd2 Qc7=) 21...Qc7 22.Kg1 Re7 23.Qc2 (23.Nd4 Re1 24.Re1 b6=) 23...Rde8 24.Ne4 Ne4 (24...Qe5!?+=) 25.de4= Nf6 26.Nc3 Qf4 The pressure on e4 grows 27.f3 h6 28.Rd3 Nh5 29.b5 Re6 (29...Qg3 30.Qf2=) 30.bc6 bc6 31.Rd7 Rg6 32.Qf2 (worse is 32.Ra7 Qf3 33.Kh1 Qg3-/+) 32...Qb8 33.Qa7?? (better is 33.Ne2!?+=) 33...Nf4 (33...Rg2 34.Kg2 Qg3 35.Kf1 Qf3 36.Kg1-+) 34.Qb8 Rg2 (34...Rb8?! 35.Rd2=) 35.Kf1 Rb8 36.Ne2?? (better is 36.Rb1 Rb1 37.Nb1-/+) 36...Rb2-+ 37.Rdd1 (37.Rc7 Rh2 38.Kg1 Rhe2 39.Re2 Re2-+) 37...Rge2 38.Re2 Re2 39.Ra1 (39.Rd8 Kh7 40.Rd7 f6-+) 39...Rb2 (39...Rb2 40.h4 Rb3-+; 39...Rh2 40.Kg1 Rh3 41.Kf2-+) 0–1. Dolin – Frias, Las Palmas, 1975.

4.d4 f6 5.Nf3 e6 6.Bd3 (6.a3!?=) 6...Bd3-/+ 7.cd3 Bb4 8.Nbd2 Ne7 9.0-0 Bd2 10.Qd2 0-0 11.e4 c6 12.e5 (12.Ba3 Nb6+=) 12...fe5 13.de5 c5 14.d4 c4 (14...Qe8 15.dc5 Nc5 16.Rac1-/+) 15.Rac1 (15.Ng5!? Qb6 16.Ba3+=) 15...Ng6-/+ 16.Ng5 (16.Ba3 Rf5-/+) 16...Qe7 17.f4 b5 18.Qe3 a5?? (18...Rf5-+) 19.a3?? (better is 19.Qh3!? h6 20.Ne6+=) 19...b4?? (better is 19...h6 20.Nh3 b4-+) 20.ab4 (20.Qh3 h6 21.Ne6 Rfc8=) 20...ab4 21.Qh3 h6 22.Ne6 Rf7 23.f5 Qh4? 24.fg6+- Rf1 25.Rf1 Qh3 26.gh3 Ra2?? 27.Ra1 Ra1 28.Ba1 c3 29.Nc5 Nb6? 30.Kf2 c2 31.Bb2 Nc4 32.Bc1 Kf8 33.Ke2 Ke7 34.Kd3 b3 35.Nb3 Ke6 36.Kc2 Kf5 37.Nc5 Kg6 38.Bf4 Kf7 39.Kd3 g5 40.Bg3 h5 41.Ke2 Ke7 42.Bf2 Kd8 43.Nd3 Ke7 44.Ne1 Ke6 45.Nf3 g4 46.hg4 hg4 47.Ng5 Kf5 48.Nf7 Ke4 49.Nd8 Nb6 50.e6 Nc8 51.Nc6 Kf4 52.e7 Ke4 53.Bg3 Kf5 54.e8Q Ne7 55.Qe7 (55.Qe7 Kg6 56.Ne5 Kf5 57.Qf7 Ke4 58.Qf4; 55.Qf7 Kg5 56.Bf4 Kh4 57.Qh7) 1–0. Fournier,Frederic (1950) – EMILITOS (1865), Active (3/2), 2004.

4.Be2 e5 5.Bg4 Ne7 6.Bf5 Nf5 7.a3 Bd6 8.Ne2 0-0 9.0-0 c6 10.Nbc3 Ne7 11.f4 e4 12.Nd4 Nb6 13.Qg4 Qd7 14.Qd7 Nd7 15.Na4 (15.d3 Nf6=) 15...g6 (15...b5 16.Nc3=+) 16.Nc5? (better 16.Nc3!?=) 16...Bc5 17.bc5 Nc5 18.f5 g5 19.f6 Ng6 20.Nf5 Ne6 21.a4 h5 22.Ba3 (better 22.Ng7=+) 22...Rfe8?? (22...c5 23.d4 ed3 24.cd3-/+) 23.Nd6?? (better 23.Nh6 Kh7 24.Nf7+-) 23...Reb8-/+ 24.d3 b6 (better 24...ed3!? 25.cd3 b5 26.ab5 cb5=+) 25.de4= de4 26.Rab1 c5 27.Ne4 Rd8 28.a5 Ne5 29.ab6 (better 29.Ng5!? Ng5 30.Rf5 Nh3 31.gh3+=) 29...ab6=+ 30.Bb2 Nc4 31.Bc3 (31.Bc1 Ra2 32.c3 Kh7-/+) 31...Ra2 32.Ng3 (32.Rfc1 Ne3 33.Bd2 Nc2 34.Rb6 Ncd4-+) 32...h4 33.Nf5 Rc2 34.Be1 Kh7 35.g3 h3 36.Ra1 (36.Rf2 Rf2 37.Kf2 g4-+) 36...Kg6 37.e4 Nd4 38.Nd4 Rd4 39.Ra8 (39.Rf2 Rf2 40.Kf2 Ne5-+ (40...Kf6?! 41.Bc3-+)) 39...Rg2 (39...Rd1 40.Rg8 Kh5 41.Kh1-+) 40.Kh1 Ne3 (worse 40...Re4 41.Rg8 Kh5 42.g4 Kg4 43.Bg3-+) 41.Rg1 Rd1 42.Rb8 (42.Rg8 Kf6 43.Rb8 Ke7 44.Rb7 Kd8 45.Rf7 Rg1 46.Kg1 Re1 47.Kf2 Rf1 48.Ke3 Rf7-+) 42...Rg1 (42...Ng4 43.Rg8 Kh7 44.Rg7 Kh6 45.Rg6 Kg6 46.Rf1 Re1 47.Re1 Nf2) 43.Kg1-+ Re1 44.Kf2 Ng2 45.Rb6 Re4 46.Rc6 (46.Rb5 c4 47.Rb7 c3-+) 46...c4 (46...Ne1!? 47.Rc7-+) 47.Kf3 Rd4 48.Ke2 g4 0–1. Atotheking (1710) – DFGemini (1835), lichess.org, 2020.

4.Be2 e6 5.h4 h6 (5...Bb4?? 6.Bg7 Be7 7.Bh8 Bh4 8.Nc3+-) 6.a3 Ngf6 7.Nf3 Bd6 8.c4 dc4 9.Bc4 c6 10.Nc3 b5 11.Bb3 Bd3 12.Ne2 (12.Bc2 Bc2 13.Qc2 0-0=) 12...Qc7 13.Rc1 Qb7 14.Nfd4 Exerts pressure on the backward pawn (14.Bc2 Be2 15.Qe2 a5=) 14...Rc8 (14...c5 15.bc5 Nc5 16.Nf3-/+) 15.f4 (15.Rc3!? Bg6 16.Bc2 Bc2 17.Rc2+=) 15...c5-/+ 16.bc5 Nc5 (16...Qg2? 17.Rg1 Be2 18.Ne2+- (18.Rg2?! Bd1 19.Kd1 Rc5+/–; 18.Qe2?? Qg1 19.Qf1 Qg3 20.Kd1 Rc5-+); 16...Bc5?! 17.0-0+=) 17.Ba2? (17.Nf3 Nfe4 (17...Nb3?! 18.Rc8 Qc8 19.Qb3+=) 18.Rh2 0-0-+ (18...Nb3?! 19.Qb3 Bc4 20.Rc4 Rc4 21.Bg7+=)) 17...Ke7 (better is 17...Qg2 18.Rg1 Qh3-+) 18.0-0-/+ Be4 19.Nf3 Nd3 Black intends b4 20.Bf6 gf6 (20...Kf6 21.Rc8 Rc8 22.Qa1 Ke7 23.Qg7 Bf3 24.Rf3+=) 21.Rc8 Rc8 (21...Qc8 22.Nc3 Bf3 23.Qf3 Ba3 24.Nb5+=) 22.Ned4 (22.Bb1!?+=) 22...Ba3-+ 23.Qb3 b4 24.Bb1 Qa6 25.Nc2?? (better is 25.Bc2-/+) 25...Bd5-+ 26.Nb4 Nb4 (26...Bb3?! 27.Na6 Nf4 28.ef4-/+) 27.Qd1 Rc1 28.Qc1 Bc1 29.Rc1 Bf3 30.gf3 f5 (30...Qe2 31.Rc7 Kd6 32.Rf7 Qd2 33.e4 Qc1 34.Kg2 Qb1 35.Rf6-+) 31.Rc7 (31.Kf2 Qa3 32.Rd1 a5-+) 31...Kf8 (31...Kd6 32.Rf7 Qa1 33.Kf2 Qb1 34.Ra7-+) 32.Kf2 Qa1 33.Bc2 (33.Bf5 ef5 34.Rd7 Qh1-+) 33...a5 (33...Qc1 34.Ke2-+) 34.Ke2 (34.Rc8 Kg7 35.Bb3 Qb2-+) 34...a4 35.Bd3 (35.Rc8 Kg7 36.Bd1 a3-+) 35...a3 (better is 35...Nd3!? 36.Kd3 Qf1 37.Kc2-+) 36.Bc4 Nc2 (36...Qg1 37.Rc8 Kg7 38.Rb8 Qg2 39.Ke1-+) 37.e4 (37.Rc8 Ke7 38.Rc7 Kf6-+) 37...fe4 38.fe4 a2 39.f5 (39.Ba2 Qe1 40.Kd3 Nb4 41.Kc4 Na2 42.Rc8 Kg7 43.Rd8 Qe4 44.Rd4 Qc6 45.Kb3-+) 39...Qe1 40.Kd3 Nb4 (40...Qf1 41.Kc3 a1Q 42.Kc2 Qfb1) 41.Kc3 (41.Kd4 a1Q 42.Kc5 Qa5 43.Bb5 Qc1 44.Kd4 Qd2 45.Ke5 Qc7 46.Kf6 Qdd8) 41...a1Q 42.Kb4 Qd2 43.Kc5 (43.Kb5 Qda5 44.Kc6 Q1a4 45.Kd6 Q4b4 46.Rc5 Qbc5 47.Kd7 Qac7) 43...Qe3 (43...Qe5 44.Kc6 Qdd6 45.Kb7 Qc7 46.Ka6 Qea5) 44.Kb5 (44.Kc6 Qa4 45.Kd6 Qf4 46.Kc5 Qe5 47.Kb6 Qaa5 48.Kc6 Qec7) 44...Qb2 45.Ka6 0–1. mikebaldini (1625) – bernhard5 (1650), gameknot.com, 2014.

4.Be2 Ngf6 5.Nf3 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

4.Ne2 e5=+ 5.a3 Ngf6 6.Ng3 Bg6 7.Nc3 c5 8.bc5 Bc5 9.Be2 0-0 10.0-0 Re8 11.Ra2 (11.d4 ed4 12.ed4 Bd6=+) 11...a6 12.Bf3 e4 13.Be2 d4 14.ed4 Bd4 15.Nh5 (15.d3 ed3 16.Bd3 Bd3 17.cd3 Ne5=+) 15...Rc8 16.Nf6 Nf6 (16...gf6?! 17.Nd5 Bb2 18.Rb2=) 17.Re1 (17.Nb1 Bb6-/+) 17...b5 18.Ba1? (18.Qc1 Bf5-/+) 18...Nd5 (better is 18...Qb6!? 19.Kh1 Bf2-+) 19.Nd5-/+ Qd5 20.Qb1 Ba1 21.Qa1 Qd2 22.c4 Qa5 23.cb5 ab5 24.Rd1 Rc5 25.Qd4=+ Qc7 26.Rb2 Qc6 27.Qd7 Qd7 28.Rd7 Rc3 29.Rb5 Ra3 30.g3 h6 31.Bc4 e3 32.fe3 Rae3 33.Kf1 Rf3 34.Kg2 Be4 35.Rc7 Rc3 36.Kh3 Rc4 37.Rc4 (37...Bd3 38.Rcb4 Bb5 39.Rb5-/+). Lindberg,Rune – Lindberg,Stefan, MCO, 1996.

4.Qf3 e6 5.d3 Bb4-/+ 6.Nd2 Bd2 7.Kd2 Ngf6 8.Ne2 c6 9.h3 h6 10.g4 Bh7 11.Bg2 0-0 (11...Qa5 12.Bc3 Qc7 13.Qg3=+) 12.Nf4 (better 12.Qg3=+) 12...Ne5?? (12...e5 13.Ne2-/+) 13.Qe2?? (better 13.Be5 Nd7 14.Bc3+-) 13...Ng6 (13...Qc7 14.Rab1-/+) 14.Nh5 Nh5 15.gh5 Ne7 16.e4 (16.Qg4 Nf5-/+) 16...Qa5 (16...d4 17.f4-+) 17.Bc3-/+ Qc7 18.Qg4 (18.Rhg1 Rfd8-/+) 18...f6 (18...e5 19.Qg3 f6 20.Rhg1-/+) 19.f4 (19.Qe6!? Kh8 20.ed5 Nd5 21.Bd5-/+) 19...de4 20.Be4 (20.de4 Rf7-/+) 20...Be4 (20...Bf5 21.Qg3-+) 21.de4 Rad8 22.Ke3 (22.Kc1!? Rf7 23.Rg1-+) 22...Qb6-+ 23.Kf3 Qc5 24.Bd2?? (24.Qe6 Kh7 25.Be1 Qc2-+) 24...Qc2 (better 24...Rd2 25.Qg1 Qc2 26.Re1-+) 25.Be3? (25.Qe6 Rf7 26.Be3-+) 25...f5 26.ef5 ef5 (26...Nf5 27.Rhe1 e5 28.Qg1-+) 27.Qg3 Qe4 (27...Nd5!? 28.Rhg1 g5 29.Rac1 Qe4 30.Kf2 Ne3 31.Qe3-+) 28.Kf2 Rd3 29.Rhg1 Rf7 30.Rae1 (30.Rgd1 Nd5 31.Rd3 Qd3 32.Ba7-+) 30…Nd5 0-1. Fuirio (1655) - hollosi (1675), Rated Classical game, lichess.org, 2013.

4.Nf3 Be4 5.Be2 Ngf6 6.0-0 Bf3 7.Bf3 e6 (7...e5 8.a3=) 8.b5 Be7 (8...Bd6 9.c4=) 9.c4 0-0 10.Qe1 (10.cd5 Nd5 11.Qb3 c6=) 10...c6 (10...a6 11.cd5 Nd5 12.ba6 Ra6 13.Nc3=) 11.a4 (better 11.bc6 bc6 12.d4=) 11...Ne5?? (11...dc4 12.bc6 bc6 13.Na3=) 12.bc6 (12.Be5 dc4 13.bc6 bc6+-) 12...a6?? (12...Nf3 13.gf3 bc6-/+) 13.Bc1 (better 13.Be5 bc6 14.d4+-) 13...Ra7 (13...Nf3!? 14.gf3 dc4 15.cb7 Ra7-/+) 14.Bb2 (14.Bb2 Nd3 15.Qe2 Nb2 16.cd5 bc6 17.d4-/+; 14.Be2!? Nc4 15.cb7 Rb7 16.d3=+). Pereira – Paliester, internet, 2021.

4.f4 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.f4 Nd7).

4.f4 h5 5.Nf3= e6 6.c4 c6 7.c5 a5 8.a3 b6 9.d4 (9.cb6 Qb6 10.Bd4 Qc7=) 9...b5 (9...ab4 10.ab4 Ra1 11.Ba1+=) 10.Nbd2 h4 11.Be2 f6 (11...ab4 12.ab4 Ra1 13.Ba1=) 12.0-0 a4 13.h3 Ne7 14.Qe1 (14.Nb1 Qc7+=) 14...Ng6= 15.Nh2 Be4? (better is 15...Qc7!?=) 16.Ne4+/– White gets the initiative 16...de4 17.f5 ef5 18.d5 (18.Rf5 Ne7 19.Rf4 f5+/–) 18...Qc8 (better is 18...Nc5!? 19.bc5 Qd5=) 19.dc6+/– Qc6 20.Rd1 (20.Rf5 Ne7 21.Rf2 Ng6+/–) 20...Nge5 (20...Ne7 21.Rf4+=) 21.Rf5+/– g6 (21...Rb8 22.Ng4 Nc4 23.Bc4 bc4 24.Qe2+-) 22.Rf4+- g5 23.Rf5 Be7 24.Qf1 Rb8 25.Ng4 Ng4 26.Bg4 0-0 27.Qe2 Kh7?? (better is 27...Rbd8+-) 28.Rfd5 Ne5 29.Bf5 Kh6 30.Be4 Nc4 31.Rg5! Qe8 32.Rg6 Qg6 33.Bg6 Kg6 34.Rd7 Rfe8 35.Qg4 Kf7 36.Qh5 Kf8 37.Qh6 Kg8 Plans Nxb2 38.Qg6 Kf8 39.Bf6 (39.Bf6 Bf6 40.Qf7#) 1–0. Schiffler,L – August, Soemmerda, 1950.

5.d4 Bb4 6.c3 Bd6 (6...Ba5 7.Ne2=+) 7.de5= Ne5 8.Qd5 Nf6 9.Qb7 (9.Qd4 c5 10.Qa4 0-0=+) 9...Be4-/+ 10.Qa6 Nd3 11.Bd3 Bg2 12.Nd2 Bh1 13.Ngf3 0-0 14.c4 Nd7 15.Qc6 Nc5 16.Bc2 Bg2 (16...a6 17.Ke2 Bf3 18.Nf3=+) 17.0-0-0 g6 18.Rg1 Bf3 19.Nf3 (19.Qf3 Bh2 20.Rh1 Qd6+-) 19...Ne6 (19...Rb8 20.Qd5 Ne6 21.Ne5+=) 20.h4 (20.Ne5 Be5 21.Be5 Qe7=+) 20...Qe7 (20...a6 21.h5=+) 21.Kb1 (21.Ng5 Ng5 22.hg5 Ba3 23.Ba3 Qa3 24.Kb1 a6-/+) 21...Ba3 (21...a6 22.Be4=+) 22.Bc3 Bb4 23.Be5 Rab8 24.h5 Rb6 25.Qe4 Rfb8 26.hg6 fg6=+ 27.Nh4 Ng7 28.Qd5+= Qe6 29.Be4 Bd6+= 30.Ng6! hg6 31.Rg6 (31...Be5 32.Re6 Re6 33.Bf5+-) 1–0. Mosley,Gene – Mueller,Michael, DESC, 2005.

5.d4 Bb4 6.Bc3 Bc3 7.Nc3 =+.

5.d4 ed4 6.Bd4 Ngf6 7.Nd2 (7.Nf3 Bb4 8.Nbd2 0-0+=) 7...Bd6 (7...Nc5 8.Ngf3-/+) 8.Bd3+= Bd3 9.cd3 0-0 10.Ne2 (10.Ngf3 a6 11.a4 c5 12.bc6 bc6=) 10...a6-/+ 11.ba6 (11.a4 Ne5 12.Nf3 Nf3 13.gf3 Bb4 14.Nc3 c5 15.bc6 bc6+=) 11...Ra6 12.Qb3 c5 13.Bf6 Qf6 (13...Nf6 14.Rb1-/+) 14.Rb1 Nb6 15.0-0 Rfa8 (15...Rc8 16.Nf3-/+) 16.Nf3 Bc7 (16...c4 17.dc4 dc4 18.Qb2+=) 17.Ra1 (17.Qc2 c4 18.Nc3 Ra3+=) 17...Ra3 18.Qc2 Nd7 (18...Qc6 19.Rfb1-/+) 19.d4+= c4 20.Nc3 Qc6 21.Rfb1 Ba5 22.Nb5 Rd3 23.Rb2 (23.a4 h6+=) 23...f5 24.Rab1 g6 25.Qe2 Re8 26.Rc2 (26.Qf1 Rb8+=) 26...f4 27.Qd3 (27.ef4 Re4 Double attack (27...Re2 Pinning; 27...Re2 Deflection; 27...Re4 Decoy)) 27...cd3 28.Rc6 bc6 29.Na7 c5 (29...fe3 30.fe3 c5 31.dc5 Nc5 32.Nc6-/+) 30.Nc6 (30.dc5 Nc5 31.Kf1 fe3 32.fe3 Ne4+=) 30...Bc3 (30...fe3 31.fe3 (31.Na5? e2-+) 31...Bc3 32.dc5 Nc5 33.Kf1-/+) 31.ef4+= c4 32.Kf1 Nf6 (32...Re6 33.Nce5 Rb6 34.Rb6 Nb6 35.Ng4+=) 33.a4 Ra8 (33...Re2 34.Rb8 Kg7 35.Rb7 Kh8 36.Rb8 Re8 37.Re8 Ne8 38.a5=) 34.a5= Kg7 (34...Kf7 35.Ng5 Kg8 36.Rb5=) 35.Nfe5 (35.Rb5 Kf7=) 35...Ne4= 36.Rb7 Kh6?? (better is 36...Kh8 37.Nf7 Kg8 38.Nh6 Kh8=) 37.f3+- Nd6 (37...Nf6 38.g4 Ba5 39.g5 Kh5 40.gf6 h6+-) 38.Ng4 Kh5 1–0. Kazimierski,Tomasz – Bass,Stanley, IECC, 1999.

5.d4 Bd6 6.de5 Ne5 7.Be2 =+.

5.Bd3 Bd3 6.cd3 e5 =+.

5.Be2 e5 6.a3 e4 7.g3 Ngf6 8.Bf1 Bd6 9.Bh3 Bh3 10.Nh3 Ne5 11.Be5 Be5 12.c3 Qd7 13.Ng5? (better is 13.Ng1-/+) 13...h6-+ 14.f4 hg5 (14...Bd6!? 15.Ne4 de4 16.d4-+) 15.fe5 Ng4 16.h3? (16.d4 ed3 17.Qd3 Ne5 18.Qc2-+) 16...Nh6 (16...Ne5 17.Kf1-+) 17.g4?? (better is 17.Qh5!? Qf5 18.e6-/+) 17...Qe6 (17...Ng4 18.e6 Qe6 19.Qe2-+) 18.Qe2? (18.0-0 Qe5 19.Kg2 g6-+) 18...Qe5 (18...Ng4 19.Kd1-+) 19.a4 (better is 19.Rg1-+) 19...Qg3 20.Qf2 Qf2 21.Kf2 f6 (better is 21...Ng4 22.Ke2 Ne5-+) 22.Na3 Nf7 23.Raf1 Ne5 24.Ke2 0-0-0 25.Nc2 Nc4 (25...Rh4 26.Kf2-+) 26.d3 (26.Nd4 Kd7-+) 26...ed3 27.Kd3 Nb2 28.Kd2 Na4 29.Nd4 (29.Ra1 b5-+) 29...Nb6 30.Ne6 Rd7 31.Kc2 (31.Nd4 Nc4 32.Kd3 Re8-+) 31...Nc4 32.Nc5 (32.Re1 Re7 33.Nd4 Re3-+) 32...Ne3 33.Kd3 (33.Kb2 Nf1 34.Nd7 Ng3-+) 33...Re7 (better is 33...Nf1 34.Nd7 Ng3 35.Rg1-+) 34.Re1 Rhe8 35.Nb3 Nc4 36.Re7 Re7 37.Nd4 Re3 38.Kc2 a6 39.Rd1 (39.Nf5 Re2 40.Kd1 Rg2-+) 39...Na3 (better is 39...Rh3!? 40.Rg1-+) 40.Kb3 (40.Kb2 Nb5 41.Nb5 ab5 42.Rh1-+) 40...Nc4 41.Nc2?? (41.Kc2 Rh3 42.Rg1-+) 41...Rh3-+ 42.Na3 (42.Rd4 Nd6 43.Ne1 Ne4-+) 42...Na3 43.Ka3 Rc3 44.Kb2 Rc4 45.b5 ab5 46.Ra1 (46.Rg1 Kd7-+) 46...Rg4 47.Ra8 Kc7 48.Rf8 d4 49.Rf7 Kb6 50.Rg7 c5 51.Kc2 c4 52.Rg6 Rf4 53.Kd2 Kc5 54.Rg7 b6 55.Rc7 Kb4 Black plans c3 56.Rb7 (56.Re7 g4-+) 56...c3 57.Kd3 Kc5 (better is 57...Rf3 58.Ke2 Re3 59.Kd1-+) 58.Rc7 Kd6 59.Rb7 (59.Rc8 b4 60.Rd8 Kc5 61.Rc8 Kb5-+) 59...Kc6 (59...Rf3 60.Ke2 g4 61.Ke1-+) 60.Rf7 (60.Re7 b4 61.Kc4 b5 62.Kb4 Rf1-+) 60...b4 61.Rf6 (61.Rh7-+) 61...Rf6 0–1. ATUK – lowbrow1, Live Game Caissa's Web, 2005.

5.Na3 Ngf6=+ 6.Nc4 e6 7.Qb3 Be7 8.Nf3 0-0 9.d3 c5 10.a3 cb4 (10...b5 11.Nce5 Ne5 12.Be5 cb4 13.ab4=+) 11.ab4 Bg6 (11...Nd5 12.Ra4=+) 12.e4 (12.Be2 Nd5 13.Ra4 N7b6 14.Nb6 Qb6=+) 12...Nb6 13.Na5 Rb8 14.Be5 Bd6 15.Bd6 Qd6 16.e5 Qe7 17.ef6 Qf6 18.Rd1 Nd5 19.Nc4 Bh5 20.Be2 (20.Nce5 Bf3 21.Nf3 Rbc8+/–) 20...Nf4 21.Nce5?? (better is 21.Rg1+/–) 21...Ne2-/+ 22.Nd7 Qc3 23.Qc3 Nc3 24.Rc1 (24.Ra1 Bf3 25.gf3 a6=) 24...Bf3 (24...Na2 25.Rc4 Bf3 A) < 26.Nb8 Bg2 (26...Rb8?! 27.gf3 Rd8 28.Rg1=) 27.Rg1 Bd5-/+ (27...Rb8?! 28.Rg2 Rd8 29.d4=); B) 26.Nf8=+) 25.gf3 Na2-/+ 26.Ra1 Nb4 27.Ke2 Nc6 28.Rhc1 Rfd8 29.Nb8 Rb8 30.Ke3 g6 31.Rc5 Rd8 32.Rb1 Rd7 33.Rb3 Kg7 34.Rc1 Nd4 -+. Nepustil,Frantisek – Kovar,Ladislav, CZE–chT2a, 1995.

5.Bc4 Nb6 6.Bb3 e6 7.Nf3 Nf6 (7...Bb4?? 8.Bg7 Nf6 9.Bh8+-) 8.a3 Be7 9.0-0 c6 10.d4 Nbd5 11.Nbd2 Ne4 12.Re1 Bf6 13.Ne4 Be4 14.Nd2 Bg6 15.e4 Nc7 16.Nf3 0-0 17.Rc1 Qe8 18.Qd2 Rd8 19.d5 Bb2 20.Qb2 f6 21.Nd4 Bf7 22.dc6 e5 (better is 22...b5+-) 23.cb7 Rd4 (23...ed4 24.Rc7 d3+-) 24.Rc7 Rd8 25.Bf7 (better is 25.Rec1+-) 25...Rf7 26.Qb3 Kf8 27.Rf7 Qf7 28.Qf7 Kf7 29.Rc1 Ke6 30.g3 Rb8 31.Rc7 g5 32.Rh7 Kd6 33.f3 a6 (33...Kc6 34.a4+-) 34.Kf2 Rf8 35.Ke3 Kc6 36.a4 Rb8 37.Rf7 Rb7 (37...Rh8 38.h4 gh4 39.gh4 Kb6+-) 38.Rb7 (better is 38.Rf6!? Kd7 39.Rf7 Kc8 40.Rb7 Kb7+-) 38...Kb7 39.Kd3 (better is 39.h4 a5 40.ba5 gh4 41.gh4 Ka6+-) 39...Kc6 40.Kc4 Kd6 41.b5 a5 (41...ab5 42.Kb5 Kd7 43.Kc5+-) 42.h3 (42.h3 Kd7 43.Kd5+-) 1–0. Nebe,Lutz (1620) – Senger,Peter (1735), Koblenz–ch, 1998.

5.Bc4 Nb6 6.Be2 e6 7.Nf3 Nf6 8.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.b5 Nbd7 7.Nf3 Nb6 8.Be2).

5.Bc4 e5 =+.

5.Bc4 e6 6.b5 Ngf6 7.a4 Bd6 8.Nf3 0-0 9.0-0 Bg4 10.d4 e5 11.de5 Ne5 12.Be2 Bf3 13.Bf3 Rb8 (worse 13...Nf3 14.Qf3 Rb8 15.Bf6 Qf6 16.Qf6 gf6 17.Nd2+/-) 14.Nc3 Qe7 15.Be2 Rfd8 16.Qc2 Neg4 17.h3?? (better 17.g3!?=) 17...Ne3?? (better 17...Qe5 18.f4 Qe3 19.Kh1 Nf2 20.Rf2 Qf2-+) 18.fe3-/+ Qe3 19.Rf2 Bg3 20.Nd1? (20.Raf1!? Rd2 21.Qc1-/+) 20...Bf2 (20...Rd1!? 21.Qd1 Qf2 22.Kh1-+) 21.Nf2-/+ Rd2 22.Qc7 Re8 23.Bc1 Ne4 24.Bd2 Qf2 25.Kh2 Nd2 (25...Qe2?! 26.Re1 Qd3 27.Qb7 Qd6 28.Kg1 Qd4 29.Be3 Qa4 30.Ba7+=) 26.Bc4?? (better 26.Bg4-/+) 26...h5 (26...Nf3 27.Kh1 Re1 28.Re1 Qe1 29.Bf1 Qf1) 27.Ra2?? (27.Bd5 Re3 28.Kh1 h4=+) 27...Nf1 (27...Nf3 28.Kh1 Qg1) 28.Kh1=+ Ng3 (28...Qf5 29.Kg1 (29.Qb7 Re1 30.Qf7 Qf7 31.Bf7 Kf7-+) 29...Ng3 30.Ra1= (worse 30.Qg3 Qc5 31.Rf2 Qc4-/+)) 29.Kh2= Nf1 30.Kh1 Qe1?? (better 30...Qf5=+) 31.Qf7 (31.Qf7 Kh7 32.Qh5) 1-0. BeepBeepImAJeep (2595) - Zubrrr (2605), lichess.org, 2017.

5.Bc4 Ngf6 6.Qb3 e6 7.Nf3 Nb6 8.Be2 Nbd5 (8...Bd6 9.0-0=) 9.a3= Be7 10.d3 Bg6 (10...Bg4 11.h3 Bh5 12.0-0=) 11.Ne5+= Qd6 12.Ng6 hg6 13.h3 Ne3 (13...c6 14.Nd2+=) 14.fe3 Qg3 15.Kd2 0-0-0 (15...Qg2 16.Nc3+-) 16.Bf3 (16.Nc3 Qg2 17.Qc4 Rh3 18.Rh3 Qh3+-) 16...Qf2+= 17.Kc3 (better 17.Kc1!? Qe3 18.Kc2+=) 17...Nd5=+ 18.Bd5 Bf6 19.d4 Qe3 (19...Rd5!? 20.Kd3 Bg5=) 20.Kc2= Qf2 (20...Qe2 21.Nd2 Rd5 22.Qf3=) 21.Nd2+= Rd5 The pressure on the isolated pawn grows 22.Rhf1 (better 22.Qf3 Qh4 23.Ne4+-) 22...Qg2=+ 23.Qf3 Qh2 (23...Qh3? 24.Rh1 Rdh5 25.Rh3 Rh3 26.Qf1+-) 24.Rf2 Qd6 25.Ne4 Qc6 26.Kb3 (26.Kb1 Rf5 27.Qe3 Rh4-/+) 26...Bd4 (better 26...Rf5!? 27.Qd3 Rh3 28.Qh3 Qd5 (28...Qe4 29.Rf5 gf5 30.Rd1+=) 29.Kc3 Bd4 (worse 29...Qe4 30.Qh8 Kd7 31.Rf5 Qd4 32.Kc2 Qb2 33.Kd3 Qa1 34.Rf2-+) 30.Kd2 Bb2 (30...Bf2?! 31.Qd3-+; 30...Qe4?! 31.Rf5 gf5 32.Bc3=+) 31.Qd3 Ba1-+) 27.Rc1=+ Qb6 28.Rfc2 c6 (28...Bb2 29.Rc7 Qc7 30.Kb2 Qc1 31.Kc1=) 29.Nc5 (better 29.Qf7!? Rh3 30.Ka2 Bb2 31.Qe6 Kb8 32.Qh3 Bc1 33.Rc1+-) 29...Bb2 30.Kb2 a5?? (30...Qc7 31.b5 Kd8 32.Ka2=) 31.Na4?? (better 31.Qf7 ab4 32.Qe6 Kd8 33.a4+-) 31...Qb5 (better 31...Qd4 32.Kb1 ab4-/+) 32.Kb3?? (better 32.Nc3 Rf5 33.Qg2=+) 32...ab4 (better 32...Rd3 33.Qd3 Qd3 34.Rc3 Qd5 35.Kb2 Qd4-+) 33.ab4?? (33.Nc5 ba3 34.Ka3-+) 33…Rd3 (33...Rd3 34.Qd3 Qd3 35.Rc3 Qf5-+) 0–1. GuestPRBF – GuestTBTM, freechess.org, 2017.

(--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.c4 Nd7).

5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.Nf3 Nd7 5.c4).

5.Nf3 e6 6.a3 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.a3 dc4 6.Bc4 Ngf6 7.Qb3 Bg6 8.Nf3 Be7 9.Nh4 0-0 10.Ng6 hg6 11.Nc3 c5 12.b5 a6 13.a4 ab5 14.ab5 Ra1 15.Ba1 e4 16.Nd5 Nd5 17.Bd5 Bf6 18.0-0 Qb6 19.Be4 Ne5 20.d4 cd4 21.ed4 Nc6 22.d5 Nd4 23.Bd4 Bd4 24.Bg6 Qg6 25.Rd1 Qb6 26.Qf3 Ra8 27.g3 Ra1 28.Ra1 Ba1 29.Qf5 g6 30.Qc8 Kg7 31.Qc4 Bd4 32.Qe2 Qd6 33.Qe4 Qe5 34.Qf3 Bc5 35.d6 Qd6 36.Qb7 Qb6 37.Qd5 Qb5 38.Qe5 Kf8 39.Qh8 Ke7 40.Qe5 Kd8 41.Qf6 Kc8 42.Qf7 Qb1 43.Kg2 Qb7 44.Qf3 Qe7 45.Qa8 Kd7 46.Qb7 Ke6 47.Qe4 Kf7 48.Qf4 Kg7 49.h4 Qb7 50.Kh3 Qh1 51.Kg4 Qd5 52.Qc7 Kh6 53.Qf4 Kh7 54.Kh3 Bd6 55.Qg5 Qf3 56.Qe3 Qf5 57.g4 Qf6 58.f3 Qb2 59.Qa7 Kg8 60.Qg1 Bf4 61.h5 g5 62.h6 Kh7 63.Qg2 Qc1 64.Qf2 Qh1 0-1. Max1993Brand (2000) - rookenstein (2000), Rated Blitz game, lichess.org.

5.a3 c5 6.bc5= Bc5 7.cd5 a6 (7...Qb6 8.Bc3=) 8.Nf3+= Bd6 9.Nc3 Ngf6 10.Be2 0-0 11.0-0 h6 12.d3 b5 13.e4 Bh7 14.Rc1 Re8 0-1. kaalmakreel (2085) - Benrubs (2490), ChessWorld.net, 2021.

5.b5 Nc5 6.d4 (6.Be5 dc4 7.Bc4 Bd3-+) 6...ed4 7.Bd4 Ne4 (7...Nf6 8.Nc3=) 8.Nc3 (8.a3 Ngf6=) 8...Bb4 (8...Ngf6 9.Ne4 Ne4 10.Qa4=+) 9.Qb3 c5 (9...Bc3 10.Bc3 Nc3 11.Qc3 Qf6=) 10.Bg7 (10.bc6 Qh4 11.g3 Bc3 12.Bc3+-) 10...dc4 (10...d4 11.0-0-0 Nc3 12.Bh8 Nd1 13.Qd1 Ba3 14.Kd2 de3 15.Ke2 Qd1 16.Kd1 Rd8 17.Ke2 Bd3 18.Ke3 Bf1 19.Ne2-+) 11.Qb2 Ngf6 12.Nge2 Rg8 13.Bf6 Qf6 (13...Nf6?! 14.a3 Ba5 15.Rd1=) 14.a3? (14.Rc1 Bg4 15.f3 Bf3 16.gf3 Qf3-+) 14...Bc3 (14...Nc3?! 15.ab4 cb4 16.Rc1=+) 15.Nc3 Qc3 (15...Nc3?! 16.Rc1 Ne4 17.Qf6 Nf6 18.Rc4-+) 16.Qc3 Nc3 17.Bc4 Rg4 18.Bf1 Ra4 19.f3 (19.Kd2 Nb1 20.Kc1 Na3-+) 19...Rd8 20.h3 (20.g4 Be6 21.h4 c4-+) 20...Bd3 21.Bd3 Rd3 22.b6 ab6 23.e4 (23.Kf2 Rd2 24.Kg3 b5-+) 23...b5 (24.Kf2 Rd2 25.Kg3 Ne2 26.Kh2 Nf4-+) 0–1. Dopper,Johan – Andersson,Lars H, corr SOK–93–95, 1994.

5.b5 Ngf6 6.Nf3 Bd6 7.d4 =+.

5.cd5 Bb4 6.Bb5 Ngf6 7.Be5 0-0 8.Bc3 Nd5 9.Qf3 Bb1 10.Qd5 c6 11.Qd4 Bc3 12.Qc3 Be4 13.f3 (13.Bf1!?+=) 13...cb5-+ 14.fe4 Qh4 15.Ke2 Qe4 16.Nf3 Rac8 17.Qd4 Qd4 (better is 17...Qg6!? 18.Kf2 Nc5-/+) 18.Nd4+= (worse is 18.ed4 Rfe8 19.Kf2 Nf6-/+) 18...b4 (18...a6 19.Rac1+=) 19.Nf5 Rc2 20.Ne7 Kh8 21.Rhc1 Rb2 22.Rc7 Nf6 23.Rb7 Ne4 24.Rd7 g6 25.Nc6 Rc8 26.Ne5 (26.Nd8 f5 27.Ne6 Rbc2+=) 26...Rcc2 (26...f6!? 27.Nf3 a5-/+) 27.Nf7= Kg8 28.Nh6 Kf8 29.Rf7 Ke8 30.Ra7 (30.Rh7?? Rd2 31.Kf3 Ng5 32.Kf4 Nh7-+) 30...Rd2 31.Kf3 Ng5 (31...Nf6 32.Kf4+=) 32.Kf4= Rg2 33.Ke5 (better is 33.h4 Ne6 34.Ke5=) 33...Ra2?? (better is 33...Rh2 34.Ng4 Rhd2+=) 34.R1a2 Ra2 35.h4 (better is 35.Ra2 Kf8+-) 35...Ra5 (better is 35...Ra7 36.Ng4 b3 37.Nf6 Kf7 38.Nd5-+) 36.Kd4 (36.Ra5 Nf7 37.Nf7 Kf7 38.Ra7 Kg8 39.Kf6+-) 36...Ne6 37.Kc4 Rh5 (37...Ra7 38.Kb4 Ra1 39.Kc4-+) 38.Rf7?? (better is 38.Nf7 Kf8 39.Kb4 Rh4 40.Kb5-/+) 38...Rh4 (better is 38...Rh6 39.Rb7 Rh4 40.Kd5-+) 39.Kb3 (39.Kd5 Rh6 40.Rb7-+) 39...Nc5 40.Kc2 Rh6 (40...Rh6 41.Rc7 Rh2 42.Kd1 Nd3-+) 0–1. Schmidt,Kristian – Utnes,Peter Vedal, Tromsoe Bymesterskap–B, 2007.

5.Nf3 f6 6.a3 =.

5.Nf3 Qf6 6.Qb3 =+.

5.Nf3 Ngf6 6.Ne5 Bb4 7.cd5 Nd5 8.Qf3 +=.

5.a3 Ngf6 6.Nc3 (6.Nf3 a5 7.c5 ab4 8.ab4 Ra1 9.Ba1 Be7=) 6...c5 (6...dc4 7.Bc4 a5 8.ba5 Ra5 9.Nf3=+) 7.bc5 Nc5 (7...Bc5 8.cd5 ed5=) 8.Nf3 (8.cd5!? ed5 9.Nf3=) 8...dc4-/+ 9.Bc4 Bd3 10.Bb3 a6 (10...b5 11.Bc2-/+) 11.Na4 (11.Rc1 b5=+) 11...Rc8 (11...Na4 12.Ba4 b5 13.Bc2=+) 12.Nc5=+ Bc5 13.Ne5 Ba7 (13...Be7!?=+) 14.Rc1 Rc1 15.Qc1 0-0 16.Qc3 (16.Nd3 Qd3 17.Qc2 Qc2 18.Bc2 Rc8=) 16...Bf5 17.d3 (17.f3 Bb8=) 17...Qc8 18.0-0 Qc3= 19.Bc3 Rc8 20.Bb2 Ng4 21.Ng4 Bg4 22.d4 Bf5 23.d5 ed5 24.Bd5 Kf8 25.a4 Rc7 26.a5 b5 27.h3 f6 28.Rd1 Ke7 29.g4 Bc8 30.Be4= g6 31.Rd5 Bb7-+ 32.Ba3 Kf7 33.Rd6? Be4-+ 34.Bb2 f5 35.Ra6 Bc5 36.Rf6 Ke7 37.a6 Bd6 38.gf5 Bf5 39.f4 Ra7 40.h4 Ra6 41.h5 b4 42.Be5 b3 43.Kf2 Rb6 44.Bb2 Bc7 45.Rb6 Bb6 (46.hg6 Bg6-+) 0–1. Van Splunter,Niels – Volkers,Annemarie, Hengelo op U16, 2001.

5.cd5 ed5 6.a3 Ngf6 7.Qf3 (7.Nf3 Bd6=+) 7...Bg6 (7...Bg4 8.Qg3=+) 8.Nh3 (8.Ne2 Be4 9.Qg3 a5=+) 8...Bd6-/+ 9.Nf4 (White gets the initiative) 9...0-0 (better is 9...Be4!? 10.Qh3 Qe7=+) 10.Nd5= Nd5 11.Qd5 Nf6 (11...Qe7 12.Qb7 Be4 13.Qa6+/–) 12.Qb7 (12.Qf3 Ne4+=) 12...Re8 (12...a5!?+=) 13.Nc3 (13.Qa6 Nd5+/–) 13...Qe7 14.Bb5+- Rab8 15.Qa7 Rb5? 16.Nb5 Bd3 17.Nd6 Qd6 18.Qd4 Ba6 19.Qd6 cd6 20.Bf6 gf6 21.Rc1 f5 22.Rc6 Bb5 23.Rd6 Rc8 24.Kd1 Ba4 25.Ke2 Bb5 26.Kf3 Ra8 (27.Ra1 Kf8+-; 26...Rc2 27.Rd8 Kg7 28.d4+-). SilentPlayer – Retiornot, Live Game Caissa's Web, 2005.

5.cd5 ed5 6.Nf3 Bb4?? 7.Bg7 Ngf6 8.Bh8 +-.

5.cd5 ed5 6.Nf3 Ngf6 7.a3 Bd6 8.Nd4 Bg6 9.Be2 0-0 10.f4 h6 11.0-0 c6 12.Nc3 a6 13.Rc1 Qe7 14.Nf3 (14.Nb3 Nb6=) 14...Ne4 (14...a5 15.ba5 Ra5 16.a4=+) 15.Ne4 de4 16.Nd4 a5 17.b5 c5 18.Nb3 (18.Nc2 Rfd8=) 18...b6 19.a4 (19.Bc4 Bf5=) 19...Nf6 20.Bc4 Rad8 21.h3 Bc7 22.Qe2 Rfe8 23.g4 Nd7 24.Qf2 Bh7 25.Kh1 ½–½. Aubertin,Tim – Weidinger,Dietmar, SEM Meister qual2, 2004.

5.cd5 ed5 6.Nf3 Ngf6 7.d4 Bb4 8.Nbd2 Ne4 (8...Qe7 9.Rc1 c6 10.Be2-/+) 9.Be2 (9.Qb3 Nd2 10.Nd2 Bd2 11.Kd2 Nb6-/+) 9...0-0 10.0-0 a6 11.Qb3? (better is 11.Rc1-/+) 11...Bd2-+ (< 11...Nd2 12.Nd2 Bd2 13.Rad1 Be3 14.fe3-+) 12.Nd2 (12.Qd5 Bg6 13.Rad1-+) 12...Nd2 13.Qd5 Be4 (13...Nf1?! 14.Qf5 Nh2 15.Kh2-+) 14.Qa5 Nf1 15.Kf1 b6 16.Qc3 Nf6 17.f3 Bg6 18.e4 b5 19.d5 Rc8 20.a4 c5 21.ab5 ab5 22.Bb5 -+. gtate (1900) – vegardramstad (2075), net–chess.com, 2004.

5.Nf3 c6 6.a4 Ngf6 7.b5 Bg6 8.Be2 Bd6 9.d4 dc4 10.Bc4 Bb1 11.Qb1 Qa5 12.Ke2 0-0 13.Rc1 Rac8 14.bc6 Rc6 15.Bb5 Rc1 16.Qc1 a6 17.Bd3 Qh5 18.Ba3 Ba3 19.Ra3 e5 20.de5 Ne5 21.Qc5 Re8 22.Rc3? (better is 22.Qb4 Nf3 23.gf3+=) 22...Nd3-+ 23.Kd3 (23.Qh5 A) worse is 23...Nh5 24.Kd3 (24.Rd3? Nf4 25.Kd2 Nd3 26.Kd3 Rc8-+) 24...Nf6 25.a5+=; B) 23...Nf4 24.Kf1 N4h5-+ (24...N6h5?! 25.ef4 Nf4 26.Rc7-/+)) 23...Qg6 24.Ke2 Ne4 (24...Qg2?! 25.Qf5+=) 25.Qc8 Nc3 26.Qc3 Qg2 27.Qc7 Qg4 28.a5 Qc8 29.Qb6 Re6 30.Qd4 h6 31.Qb2 Rc6 32.Nd4 Rc1 33.Kd2 Rh1 34.Nf3 Qd7 35.Qd4 Qc7 36.Qa4 Qc1 37.Kd3 Qf1 (37...Qb1 38.Kd2-+) 38.Ke4 Qb1 39.Kf4 Qb5 40.Qe4 (40.Qc2 Ra1-+) 40...Ra1 (worse is 40...Qa5 41.Qe8 Kh7 42.Qf7-+) 41.Nd4 Qg5 42.Kf3 Qh5 (worse is 42...Ra5 43.Qe8 Kh7 44.Qf7 Qh5 45.Qh5 Rh5 46.Kg3-+; 42...Qa5?! 43.Qe8 Kh7 44.Qf7-+) 43.Kg2 Ra5 (worse is 43...Qa5 44.Qe8 Kh7 45.Qf7 Qg5 46.Kf3-+) 44.Nf3 Qg6 (44...Qg6 45.Qg6 fg6-+) 0–1. Krebbers,Wilfried (2115) – Weyrauch,Erich (2150), NRW Class1, 2009.

5.Nf3 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.Nf3 Ngf6 6.a3 a5 7.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.c5 a5 7.a3).

5.Nf3 Ngf6 6.b5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Nbd7).

5.Nc3 c6 6.a3 (6.cd5 Nd5 7.Nd5 cd5 8.Nf3=) 6...Ne5 (6...dc4!? 7.Bc4 Ne5=+) 7.cd5 (7.Nd5 Nd3 8.Bd3 Bd3+-) 7...Nd3 (7...cd5!? 8.Nf3 Nc4 9.Bc4 dc4+=) 8.Bd3+- Bd3 9.dc6 bc6 10.Nf3 Qc7 11.Qb3 e6 (11...a5 12.Rc1+-) 12.Rc1 Bd6 (12...a5!?+-) 13.Nd5+- ed5 (13...Nd5 14.Qd3 0-0 15.Ng5+-) 14.Qd3 0-0 (14...Qd7 15.Bf6 gf6 16.Nd4+-) 15.Ng5 (better 15.Bf6!? gf6 16.Nd4 Qe7+-) 15...Be5 16.Bd4 (16.Be5 Qe5 17.Nf3 Qd6+-) 16...Rfe8 (16...Bd4 17.Qd4 (17.ed4?! Rfe8 18.Kf1 Qb6=) 17...Rfb8 18.Qc5+-) 17.b5 (17.Be5 Qe5 18.Nf3 Qd6+-) 17...Bd4 18.Rc6?? (better 18.Qd4 Qe7 19.Rc6 Qa3 20.0-0+-) 18...Re3?? (better 18...Qf4! 19.Nf3 Bb6-/+) 19.fe3+- (worse 19.de3 Qa5 20.Ke2 Bb2+-) 19...Qe5 (19...Qd7 20.ed4 Re8 21.Kf2+-) 20.Nf3 Qe4 21.Qe4 (21.Qd4 Qb1 22.Kf2 Ne4 23.Ke2 Qh1+-) 21...de4 22.Nd4 1–0. Williams,Barry – Bell,David, NZL Wanganui Chess Club A–Grade Champio, 2002.

5.Nc3 e5=+ 6.Qb3 (6.Nf3 Bb4 7.Nd5 Bd6=+) 6...d4 7.ed4 ed4 8.Nb5 c5 9.Qg3 Qe7 10.Kd1 (10.Be2 Rc8 11.bc5 Nc5 12.Bd4 a6+=) 10...Ne5 (better is 10...Ne4!? 11.Qf4 Qe5 12.Qe5 Ne5=+) 11.bc5= Ne4 (11...Qc5? 12.Bd4 (12.Nd4 Ne4 13.Qf4 Bg6=+) 12...Ne4 13.Qe3+- (13.Qe5 Qe5 14.Be5 Nf2 15.Ke1 Nh1 16.Nc7 Kd7 17.Na8 Bc5+=)) 12.Qf4 Bg4 (12...Qf6 13.Nc7 Kd8 14.Nd5 Bg4 15.Ke1 Qf4 16.Nf4 Nc5 17.f3=) 13.Kc1 (better is 13.Kc2!? f5 14.Bd4+/–) 13...Nc5=+ 14.Qd4 Nc6?? (better is 14...f6 15.Qe3 a6=) 15.Qg4+- Nb4 (15...a6 16.Nd4 (16.Bg7?! Bg7 17.Nc7 Kd8 18.Na8 Ba1+=) 16...Nb4 17.Nh3+-) 16.Nh3 (16.Bd4 a6 17.Nc3 Qe1 18.Qd1 Qe6+-) 16...Qe1 (16...a6 17.Nc3+- (17.Bg7 Bg7 18.Nc7 Kd8 19.Na8 Qe1 20.Qd1 Na2 21.Ra2 Nb3 22.Kc2 Nd4 23.Kc1 Nb3 24.Kc2 Nd4 25.Kc1 Nb3=)) 17.Qd1 Nbd3 (17...Qe7 18.Qe2 Ncd3 19.Kb1 Qe2 20.Be2+-) 18.Bd3 Nd3 19.Kc2 Qe4 (19...Qd1 20.Rad1 (20.Kd1?! Nb2 21.Kc2 Nc4+-) 20...Nb2 21.Kb2+-) 20.Nc3 (better is 20.Nc7 Kd7 21.Na8 Bc5 22.Bg7 Ra8+-) 20...Qc4 (20...Nb4 21.Kb3 Qg2 22.Re1 Kd7+-) 21.Qe2 Be7 22.Qd3 (22...Qd3 23.Kd3 0-0-0 24.Kc2+-) 1–0. Kulbacki,James – Grams,P, Detroit ch–MI, 1992.

5.c5 e6 6.Nf3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.cd5 Nd5 6.Qf3 Be6 =.

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.a3 Bd6 6.Nd2 Ngf6 7.c4 c6 8.c5 Bc7 9.a4 (9.Ngf3 Ne4=) 9...0-0 10.b5 (10.Ngf3 Rb8=+) 10...e5 11.Ngf3 ed4 (11...e4!? 12.Qc2 Be6-/+ (12...ef3?! 13.Qf5 fg2 14.Bg2=)) 12.Nd4= Bg4 (12...Be5 A) < 13.Nf5 Bb2 14.Rb1 Bc3-/+; B) 13.bc6?! B1) 13...Nc5 14.cb7 (14.Nf5 Bb2 15.Rb1 Bc3 16.cb7 Rb8-/+) 14...Rb8 15.Nc6 (15.Nf5 Bb2 16.Rb1 Bc3-/+) 15...Bb2 16.Nd8 Rfd8 17.Ra2+/–; B2) 13...Bd4 14.Bd4 bc6=; C) 13.N2f3 Qa5 14.Qd2 Qd2 15.Nd2 cb5 16.N2f3 Bd4 C1) < 17.Bd4 ba4 18.Bf6 Nf6-/+ (18...gf6?! 19.Nd4 Be4 20.c6 bc6 21.Nc6=+); C2) 17.Nd4=) 13.Qc2 (13.f3 Be6+=) 13...Ba5 (13...Ne5 14.f4 Ng6 15.Ra3=) 14.Bd3 (14.f3 Qe7 15.fg4 Qe3 16.Be2 Ng4=) 14...Bd2= 15.Kd2 cb5 (15...Qa5 16.Bc3 Qc7 17.h3=) 16.ab5 (16.f3 Bh5 17.c6 Ne5 18.cb7 Rb8 19.ab5 Nd3 20.Qd3 Bg6+/–) 16...Rc8 (better is 16...Ne5!?+=) 17.c6+/– Ne5 18.f3 (better is 18.Ra7 Nd3 19.Qd3 Ne4 20.Ke1+/–) 18...Bh5? (better is 18...Bd7+=) 19.Ra7+- bc6 (19...Re8 20.Rb7 Bg6 21.Bg6 fg6 22.Bc1 Nc4 23.Ke2+-) 20.Nc6 (20.bc6?! Bg6 21.Bg6 hg6+/–) 20...Rc6 (20...Nc6 21.bc6 Bg6+-) 21.bc6 Ne4 22.Kc1 Qb6 23.Bd4?? Qc6?? 24.fe4 Qe6?? 25.Bc3 de4 26.Be4 Rc8 27.Bh7 Kh8 28.Ra3 Qe7?? 29.Kb2 Rb8 30.Ka2 Qc5?? (30...f5 31.Ra6 Qb7+-) 1–0. Kazak,Alexander – Nozdrachev,Leonid, RUS–ch U16 Dagomys, 2004.

5.a3 Ngf6 6.c4 dc4 7.Bc4 c6 8.Nf3 Bd6 9.Nc3 Ne4 10.Rc1 0-0 11.g3 Nc3 12.Bc3 Bg4 13.Be2 Qe7 14.0-0 Rad8 15.Nd2 Be2 16.Qe2 e5 17.Nc4 Bc7 18.Rfd1 ed4 19.Rd4 Nf6 20.Rh4 a6 21.Qc2 h6 22.Qb2 Kh7 23.Nd2 Rd5 24.e4 Rd7 25.Nf3 Ne8 (25...Ne4?? 26.Bg7 Qh4 27.Nh4+- (27.gh4?! Rg8=; 27.Bf8?! Qf6 28.Qe2 Nc3 29.Qc2 Kg8 30.Qc3 Qc3 31.Rc3 Kf8=)) 26.Nd4 Be5 27.Nf5 Bc3 28.Qc3 Qf6 29.Qc5 Nd6 30.Rh5 (better is 30.Rf4!? Qe6 31.e5+=) 30...Rfd8=+ 31.Re1 Nf5 32.Rf5 Qe6 33.Re5 Qd6 34.Qd6 Rd6 35.Re7 R6d7 36.Rd7 Rd7 37.Re3 Rd2 38.Kf1 Ra2 39.Rd3 f6 40.Kg2 Kg6 41.Kf3 Rc2 42.Ke3 c5 43.bc5 Rc5 44.f4 b5 45.Kd4 Rc4 46.Kd5 Kf7 47.e5 Ke7 48.Rf3 Rc2 49.h3 Rc1 50.Rd3 Rc8 51.Ke4 Rc6 52.Kd5 Rc8 53.Rb3 Rc4 54.Rf3 Rc1 55.Rd3 Rc8 56.Ke4 Rc6 57.Kf5 g6 58.Ke4 Ke6 59.Rd4 a5 60.h4 Rb6 61.Rd8 b4 62.ab4 ab4 63.Rd2 (better is 63.Rf8!? fe5 64.fe5=+) 63...b3 64.Rb2 Rb4 65.Kd3 fe5 66.fe5 Ke5 67.Kc3 Rb6 68.Kd3? (better is 68.Re2 Kf5 69.Kb2-+) 68...Kf5 69.Ke3 Kg4 70.Kf2 Rf6 71.Kg1 (71.Ke2 Rf3 (< 71...Kg3 72.Rb3 Kh4 73.Rb4 Kg3 74.Rb3 Kg2 75.Rb8-+) 72.Rd2 Kg3-+) 71...Rf3 (71...Kg3?! 72.Rb3 Kh4 73.Rb4 Kg3 74.Rb3 Kf4 75.Rb4 Ke3 76.Rb3 Kd4 77.Rb4 Kd3 78.Rb3 Kc4 79.Rb8-+) 72.Kh2 (72.h5 Rg3 73.Kf2 g5-+) 72...Rg3 (better is 72...Rc3 73.Rb1 Rc2 74.Kg1-+) 73.Rd2 Kh4 74.Rd4 Rg4 75.Rd1 b2 76.Rb1 Rb4 77.Kg2 g5 78.Kf3 g4 79.Kg2 Rb3 80.Rh1 Kg5 81.Rb1 h5 82.Kh2 h4 83.Kh1 Kf4 84.Kg2 Ke4 85.Kf2 Kd3 86.Rb2 Rb2 87.Kg1 Ke3 (88.Kh1 g3 89.Kg1 h3 90.Kh1 Rb1#) 0–1. Wilk,Adam – Bitman,Marek (2100), Poland–chT region, 1999.

5.a3 Ngf6 6.Nf3 c6 7.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.d4).

5.a3 c6 6.c4 e6 (6...a5 7.Nd2=+) 7.c5=+ Be7 8.Nd2 Ne4 (8...0-0 9.Ngf3=+) 9.Ngf3 0-0 10.Rc1 (10.Be2 Ndf6=+) 10...Ndf6 11.Ne5 Nd2 12.Qd2 Ne4 13.Qd1 f6 (13...Bh4 14.g3 Bg5 15.Qe2+=) 14.Nd3= Bg6 (better 14...Qc7!?=) 15.Nf4+- Bf7 16.f3 g5? (better 16...Ng5+-) 17.Nd3+- (17.fe4?! gf4 18.Qg4 Kh8 19.Qf4 Bh5+-) 17...Bh5 (17...a5 18.fe4 de4 19.Nf2+-) 18.Be2 Bg6 (18...a5 19.0-0+-) 19.fe4 de4 20.Nf2 f5 21.Bc4 Bf7 22.0-0 g4 (22...Bf6 23.Qe2+-) 23.Ne4! fe4 (23...Qc7+-) 24.Qg4 Bg5 25.h4 1–0. Kononenko,Igor – Amursakov,Vasily, 5th Cup Governov B, 2009.

5.c4 c6 6.Nc3 e6 7.Qb3 (7.c5 Be7=+) 7...Be7 8.Nf3 0-0 9.Be2 h6 (9...dc4 10.Bc4 b5 11.Be2=+) 10.0-0 Qb8 (10...dc4 11.Qc4 a5 12.ba5 Qa5 13.Qb3=) 11.Rac1 Bd6 (11...dc4 12.Bc4 b5 13.Be2=) 12.cd5 ed5 13.b5 Rc8 (13...a6 14.bc6 bc6 15.Na4 Qb3 16.ab3+=) 14.Na4 (14.Ba3 Nb6+=) 14...Bg4 (14...Be4 15.bc6 bc6 16.Ba6=) 15.h3 Bh5 (15...Bf5 16.Ba3+=) 16.Ba3 (16.Nc3 Nb6=) 16...Ne4 (16...Ba3 17.Qa3 cb5 18.Bb5 Bf3 19.gf3=) 17.Rc2 (17.bc6!? bc6 18.Qb8 Rab8 19.Bd6 Nd6 20.g4=) 17...Ba3=+ 18.bc6 Rc6 (18...b5 19.Qd5 Bf3 20.gf3=+) 19.Rc6= bc6 (19...Bf3 20.Bf3 Nd2 A) < 21.Qd5 A1) < 21...Nf1 22.Rc3 (22.Qd7?! bc6 23.Qc6 Qh2 24.Kf1 Rd8=; 22.Kf1?? bc6 23.Qb3 Qb3 24.ab3 Rc8-+) 22...Bb4 23.Qb7+/–; A2) 21...bc6 22.Qc6 Nf3 23.Qf3 Qe8-/+; B) 21.Qa3 bc6 22.Rc1 Nf3 23.gf3=) 20.Qa3 Qb7 (20...Bf3 21.Bf3 Nd2 22.Rc1 Nf3 23.gf3=) 21.Nc3 Rb8 22.Rb1 Qc7 23.Rb8 Qb8 24.Ne4 Bf3 25.gf3+/– de4 26.fe4 Qb1 27.Bf1+- Nf6 28.Qa7 Ne4 29.Qa8 Kh7 30.Qc6 Nd2 31.Qb5 Qa2 32.Bd3 g6 33.Qd7 (better is 33.Kg2+-). Wilk,K – Jablonski,J, Ustrzyki Dolne op, 1996.

5.c4 e6 6.Qa4 =+.

5.Bd3 Bd3 6.Qd3 e6 7.a3 c6 8.Nf3 Be7 9.0-0 0-0 10.Nc3 a6 11.e4 de4 12.Ne4 Ne4 13.Qe4 Nf6 14.Qd3 Qb6 15.Ne5 Rad8 16.c4 Qc7 17.f4 b5 (17...c5!?=) 18.Rac1+= Qd6 19.Rc2 bc4 (19...Nd7!?+=) 20.Rc4 Rc8 21.Rfc1 Nd5 22.Rc6 Rc6 23.Rc6 Nf4? (better is 23...Qd8!?+/–) 24.Qe4 (24.Qe4 Qd5 25.Qf4+-; 24.Rd6?! Nd3 25.Rd7 Ne5 26.de5 Bg5+=; 24.Qa6?! Qd5 25.Rc2 Qe4+=) 1–0. Fournier,Frederic (2360) – chessmo (1810), Active (5/0), 2006.

6.Bb5 Bd7= 7.a4 a6 8.Bd7 Qd7 9.Nc3 (9.a5 Rc8+=) 9...Nf6= 10.d4 Nce4 11.Ne4 Ne4 12.Ne5 Qf5 13.Qf3 (13.0-0 Rc8=) 13...Qf3+= 14.Nf3 (14.gf3 Nd6+=) 14...f6 (14...Rc8 15.c3-/+) 15.0-0 (15.Nd2!?=) 15...e6 16.Rfd1 Rc8 17.Rac1 (17.Ne1 b6+=) 17...Bb4 (17...Rc4!? 18.Ne1 Ra4 19.Ra1 Ra1 20.Ra1-+) 18.Kf1 0-0 19.Ke2 (19.Rd3 Rc4-/+) 19...Rc6 (19...Rc4 20.Ne1 Be1 21.Ke1 Ra4 22.f3-+) 20.Nd2 (better is 20.Ne1!?-/+) 20...Nd2 21.Rd2 Bd2 22.Kd2 Rfc8 (22...b6 23.Ba3 Rb8 24.Rb1-+) 23.c3 (23.a5 b6-+) 23...Rc4 24.Ra1 b5 (24...e5 25.a5-+) 25.ab5 ab5 26.Ra5 (better is 26.Ra3-+) 26...b4 27.Rc5 (27.Kc2 bc3 28.Ba3 h5-+) 27...bc3 (27...R8c5!? 28.dc5 b3 29.Ba3-+) 28.Bc3 R4c5 29.dc5 Rc5 30.f4 Rc8 31.Kd3 Ra8 32.Ke2 Ra2 (32...Kf7 33.Kf3-+) 33.Kf3 Ra3 (33...Kf7 34.h3-+) 34.Bd4 h6 35.h4 Kf7 36.Kg4 (36.g3 h5-+) 36...g6 (36...e5 37.fe5 fe5 38.Be5 Re3 39.Bf4-+) 37.Kf3 g5 38.fg5 (38.g3 gf4 39.gf4 Kg6-+) 38...fg5 (38...e5 39.Bc5 Rc3 40.Bb4-+) 39.Kg4 (39.h5 Ra4-+) 39...gh4 (39...Ra4 40.Kg3 gh4 41.Kh3-+) 40.Kh4 Kg6 41.g4 e5! (41...e5 42.Be5 Re3-+) 0–1. mtr – bacco, internet live, 2001.

6.Bb5 Bd7 7.a4 a6 8.Bd7 Qd7 9.Ne5 Qd6 10.f4 (better 10.a5=) 10...f6?? (better 10...e6=) 11.Qh5+- Kd8 (11...g6 12.Ng6! hg6 13.Qh8 Qe6+-) 12.Nf7 (12.Nf7 Kd7 13.Nd6 Kd6 14.Nc3+-) 1–0. GuestPHHT – mccannj, freechess.org, 2017.

6.Bb5 Bd7 7.a4 a6 8.Bd7 Nd7 9.0-0 Rc8 10.d3 Ngf6 (10...Qb6 11.Ra2=) 11.Nbd2+= g6 (11...e6 12.c4=) 12.c4 dc4 13.Nc4 Bg7 14.a5 (14.Rb1 Rc7+=) 14...0-0 (14...Rc7 15.Rb1+=) 15.Rb1 Qc7 (15...Rc7 16.Bd4+=) 16.Ba3+- Rfe8 17.Qb3 Rb8 18.Rfc1 Nc5 (18...Qd8 19.d4+-) 19.Qd1 Red8?? (better 19...Ne6+-) 20.Nb6+- Nfe4 21.d4 1–0. DEFFM – elmerski, freechess.org, 2018.

6.Bb5 Bd7= 7.Qe2 e6=.

6.Be2 a6+=.

(--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.Nf3 Nd7).

5.Be2 e6 6.c4 Ngf6 7.c5 Be7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7 7.Be2 Be7).

5.a3 Bd6= 6.c4 dc4 7.Bc4 Ngf6 8.d4 (8.Nc3 0-0=) 8...Qe7 (8...e4 9.Nh4 Bg4 10.Qb3=) 9.0-0 e4 10.Nh4 (10.Qc2 0-0+=) 10...Bh2 (10...Bg4 11.Be2 Be2 12.Qe2+=) 11.Kh1 (11.Kh2 Ng4 12.Kg3 Qd6 13.f4 Ne3=) 11...Bg4 12.Qb3? (better is 12.Be2 Nd5 13.Bg4 Qh4 14.Bh3+=) 12...Bd6-+ 13.g3 (13.Nc3 0-0 14.Be2 Be2 15.Ne2 Qe6 16.Qe6 fe6-+) 13...Nh5 (13...g5 14.Ng2-+) 14.Nd2 (14.Nc3 0-0 15.Kg1 Nhf6-+) 14...0-0-0 (14...0-0 15.Kg1-+) 15.Ng2 f5 (15...Rhf8!? 16.Nf4-+) 16.Be6-/+ Rhe8 17.a4?? (better is 17.d5!? Qg5 18.Nf4-/+) 17...Kb8 (better is 17...Qe6 18.Qe6 Re6 19.Ba3-+) 18.Ne4?? (18.Bf7 Rf8 19.Bh5 Bh5 20.b5-+) 18...Bf3 (better is 18...Qe6 19.Qe6 Re6 20.Nd6 Rd6-+) 19.Nd6-/+ Qd6 20.Kg1?? Ndf6 21.Nf4?? Nf4 22.ef4 Bd5 23.Bd5-/+ Nd5 24.b5 Qg6-/+ 25.Bc3? Nf6 26.Rac1 Rd7 27.Rfd1 Rg8 28.Be1 Re7 29.Qd3 h6 30.Qc4 Rc8 31.Rd3 Ng4-/+ 32.f3 Ne3?? 33.Qa2?? Qh5-/+ 34.Qf2 Nd5 35.Qh2 Qh2 36.Kh2 Rd8 37.Rc5?? c6 38.bc6?? bc6 39.Ba5= Rdd7 40.Rb3 Kc8?? 41.Rc6+- Rc7?? 42.Rc7 Nc7+/– 43.Bc7 Rc7+= 44.Rb5 g6 45.Rc5?? Rc5-+ 46.dc5 Kc7 47.g4 fg4 48.fg4= Kc6 49.Kh3 Kc5 50.Kh4 White intends g5 50...Kb4?? 51.g5+- hg5 52.Kg5 Ka4 53.Kg6 Kb3 54.f5 a5 55.f6 a4 56.f7 a3 57.f8Q a2 58.Qh8 Kc2 59.Qa1 (59.Qa1 Kd3 60.Kg5 Kc4 61.Qa2 Kb4 62.Qa6 Kb3 63.Qb5 Kc3 64.Qc6 Kb4 65.Qb6 Kc4 66.Kg4 Kd3 67.Qb5 Kc3 68.Qc6 Kd4 69.Qc1 Ke5 70.Qc8 Kd5 71.Qb7 Kc5 72.Qe7 Kb5 73.Qe5 Kc4 74.Qe4 Kb5 75.Qe3 Kc6 76.Kf5 Kd5 77.Qb6 Kc4 78.Qd6 Kb5 79.Ke4 Kc4 80.Qc6 Kb3 81.Kd3 Kb4 82.Qb6 Ka4 83.Kc4 Ka3 84.Qb3 mate). Michalak,Marek (1935) – Michalik,Marek (1805), Lukowica Poland, 2012. (Same as the game below!)

5.a3 Bd6= 6.c4 dc4 7.Bc4 Ngf6 8.d4 (8.Nc3 0-0=) 8...Qe7 (8...e4 9.Ne5 0-0 10.0-0+=) 9.0-0 e4 10.Nh4 Bh2 11.Kh1 (11.Kh2 Ng4 12.Kg3 Qd6 13.f4 Ne3=) 11...Bg4 12.Qb3? (better is 12.Be2!? Nd5 13.Bg4 Qh4 14.Bh3-/+) 12...Bd6-+ 13.g3 (13.Nc3 0-0 14.Qc2 a5-+) 13...Nh5 (13...Nb6 14.Nc3-+) 14.Nd2 (14.Nc3 0-0 15.Kg1 Nhf6-+) 14...0-0-0 (14...0-0 15.Kg1-+) 15.Ng2 f5 (15...Rhf8!? 16.Rae1-+) 16.Be6-/+ Rhe8 17.a4?? Kb8 18.Ne4?? Bf3 19.Nd6-/+ Qd6 20.Kg1?? Ndf6 21.Nf4?? Nf4 22.ef4 Bd5 23.Bd5-/+ Nd5 24.b5 Qg6-/+ 25.Bc3? Nf6 26.Rac1 Rd7 27.Rfd1 Rg8 28.Be1 Re7 29.Qd3 h6 30.Qc4 Rc8 31.Rd3 Ng4 32.f3 Ne3?? 33.Qa2?? Qh5-/+ 34.Qf2 Nd5 35.Qh2 Qh2 36.Kh2 Rd8 37.Rc5?? c6 38.bc6?? bc6?? 39.Ba5= Rdd7 40.Rb3 Kc8?? 41.Rc6+- Rc7?? 42.Rc7 Nc7+/– 43.Bc7 Rc7+= 44.Rb5 g6 45.Rc5?? Rc5-+ 46.dc5 Kc7 47.g4 fg4 48.fg4= Kc6 49.Kh3 Kc5 50.Kh4 White prepares g5 50...Kb4?? 51.g5+- hg5 52.Kg5 Ka4 53.Kg6 Kb3 54.f5 a5 55.f6 a4 56.f7 a3 57.f8Q a2 58.Qh8 Kc2 59.Qa1 0–1. Kowalewski,Wladyslaw (1755) – Sukiennik,Marek (1970), Lukowica Poland, 2012. (Same as the game above!)

5.Ne5 Ne5 6.Be5 Nf6 7.b5 (7.Nc3 Bb4 8.Rb1 Bc3 9.Bc3 0-0+-) 7...Be7 (7...Bd6 8.Bd4+=) 8.c4 dc4 9.Bc4 0-0 10.0-0 (10.Nc3 Nd7 11.Bd4 Bf6 12.Bf6 Qf6+-) 10...Bd3 (10...Ng4!? 11.Bg3 Bd6+-) 11.Bc7! Qc7 12.Bd3 Rfd8 (12...Bd6 13.f4+-) 13.Be2 Ne4 (13...Nd5 14.d4+-) 14.Bf3 f5 (better 14...Ng5!?+-) 15.Qb3+- Kh8 16.d4 Rf8 (16...Bd6 17.g3+-) 17.Be4 fe4 18.Nd2 Rae8 (18...Bd6 19.g3 Rfe8 20.Rac1+-) 19.Ne4 Bd8 (19...Bd6 20.Nd6 Qd6 21.Rac1+-) 20.Rac1 Qe7 21.f3 Qh4 (21...Bb6 22.Rc3+-) 22.Rc8 Bc7 (22...Qh6+-) 23.Rc7 Re4 (23...Qd8 24.Rb7 Re7 25.Re7 Qe7+-) 24.fe4 Rf1 25.Kf1 Qf6 26.Ke2 Qg6 27.Rc8 (27.Rc8 Qe8 28.Re8) 1–0. DEFFM – GuestPGLWhhnzuuz, freechess.org, 2019.

5.Ne5!? Ngf6 6.Bd3 Ne5 7.Be5 Bd3 8.cd3 +=.

(--> 3.e3 e6 4.Nf3 Nd7).

5.c4 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.c4 Ngf6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.c4 Ngf6 6.b5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Nbd7).

5.Be2 Ngf6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

5.Be2 Ngf6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

5.Be2 Ngf6 6.a3 Bd6 7.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Be2 Bd6).

5.Be2 Ngf6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

5.c4 c6 6.Nc3 Nb6 (6...e6 7.Nd4 Nh6 8.cd5 cd5 9.Rg1+-) 7.c5 (7.cd5 cd5 8.Nd4 Nh6+-) 7...Nd7 (7...Nc4 8.Bc4 dc4 9.e4+=) 8.Nd4 Nh6 9.Nf5 Nf5 10.Bd3 (10.d4 e5+-) 10...e6+= 11.f4 a5 12.a3 ab4 (12...b6 13.cb6 Qb6 14.Na4+=) 13.ab4+- d4? (better 13...Ra1 14.Qa1 b6+-) 14.ed4+- Ra1 15.Qa1 Nd4 16.0-0?? (better 16.Qa2 Be7 17.0-0+-) 16...Nb3 (16...Nc5 17.bc5 Nb3=+) 17.Qe1 (better 17.Qa3 Ndc5 18.Be2 Nd2 19.bc5 Qd4 20.Rf2 Bc5 21.Qa8 Ke7 22.Qb7 (22.Qh8?? Qf2 23.Kh1 Qg1) 22...Qd7 23.Qd7 Kd7 24.Bd3=) 17...e5?? (better 17...Ndc5 18.bc5 Bc5 19.Kh1 Qd3 20.Qe6 Kd8=) 18.Bc4?? (better 18.Qe2 Bc5 19.bc5 Ndc5 20.Bc2 Qd2 21.fe5+-) 18...Ndc5+= 19.bc5 Qd4 Attacking the backward pawn on d2 20.Kh1 Qc4 21.fe5 fe5? (better 21...Kd7 22.d3 Qe6+-) 22.Qe5+- Kd7 23.Qf5?? (23.d3 Qe6 24.Qb8 Nc5+-) 23...Kd8? (better 23...Qe6 24.Ne4 Qf5 25.Rf5 Rg8=) 24.Ne4+- Qd5 (24...Qd3 25.Re1 Qd7 26.Qh5+-) 25.Qf4 (better 25.Bf6 Be7 26.Be7 Ke7 27.Qf4+-) 25...Nc5?? (better 25...Kc8 26.Bg7! Bg7 27.Qg4 Kb8 28.Qg7 Rg8+-) 26.Nc5 Bc5 (26...Qc5 27.Qb8 Kd7 28.Qb7 Ke6 29.Re1 Kd6 30.Re8+-) 27.Qb8 Kd7 28.Qh8 (28.Qb7 Kd8 29.Bg7+-) 28...Qd2 (28...Be7 29.Qg7 Ke8 30.Bf6+-) 29.Qg7 Be7 (29...Kc8 30.Ra1 Bd6 31.Bd4+-) 30.Qg4 Kc7 31.Be5 Bd6 32.Bd6 Qd6 33.Qg7 Kb6 34.Rb1 Kc5 35.Qc3 Kd5 36.Rd1 (36.Rd1 Ke6 37.Qh3 Ke7 38.Qh7 Ke6 39.Qg6 Ke5 40.Qd6 Kf5 41.Rf1 Ke4 42.g4 Ke3 43.Re1 Kf3 44.Qg3) 1–0. Kuehnemund,Lutz (1975) – Jonsson,Kristjan Dagur, GAMMA Reykjavik Open, 2019.

5.c4 c6 6.d4 e6 7.a3 Bd6 8.Nbd2 Ne7 9.Qb3 0-0= 10.Nh4 Bg4 11.f3 Bh5 12.g4 Bf7 13.Ng2 (13.Bd3 e5=) 13...e5=+ 14.h4 (14.c5 Bb8=+) 14...ed4-/+ 15.Bd4 Bg3 16.Kd1 Be5 17.Qc3 (17.c5 b6=+) 17...Bd4 18.Qd4 Ne5 19.g5 (19.c5!?=+) 19...dc4-/+ 20.gf6 gf6 21.f4 Qd4 (21...Nf5 22.Qd8 Rad8 23.Kc2-+) 22.ed4 Ng4 23.Rg1 Kh8 24.Bc4 Bc4 25.Nc4 Rad8 (better 25...Nf5-/+) 26.Nge3? (better 26.Na5=+) 26...Rd4 27.Ke2 Ne3 28.Ne3 Re8 (28...Rf4 29.h5-+) 29.Kf2 (29.Kf3 Ng6 30.Ng2-+) 29...Rf4 30.Kg3 Re4 31.Kf3 (31.Ng2 Rg8 32.Kf2 Nf5-+) 31...Rh4 32.Rg3 (32.Rh1 Rh1 33.Rh1 Nd5 34.Nd5 cd5-+) 32...Ng6 33.Nf5 (33.Kf2-+) 33...Rf4 34.Kg2 Rf5 35.Rd1 Re7 (35...Nf4 36.Kf2-+) 36.Rd6 (36.Kg1 Rd5 37.Rgd3 Red7 38.Rd5 cd5-+) 36...Kg7 37.a4 (37.Rd2 Kf7-+) 37...Rf4 38.b5 (38.Rgd3 Rb4 39.Rd7 Kf7 40.Re7 Ke7-+) 38...cb5 (better 38...Re2 39.Kg1 Ra4 40.Rd7 Kh6 41.Rg2 Rg2 42.Kg2 cb5 43.Rf7-+) 39.ab5 Rb4 40.Ra3 (40.Rd5 Kf7 41.Kf2 Rb2 42.Kf1 Nf4-+) 40...Rb5 41.Ra7 (41.Ra2 a5-+) 41...f5 (better 41...Nh4 42.Kg1 Rg5 43.Kh2 Nf3 44.Kh3-+) 42.Ra8 (42.Ra2 Rbe5-+) 42...f4 43.Rdd8 (43.Rd2 h5-+) 43...Rb3 44.Rg8 (44.Re8 Re8 45.Re8 b5-+) 44...Kh6 (better 44...Kf7 45.Rg6 hg6 46.Ra2-+) 45.Rge8 (45.Rae8 f3 46.Kf2 Rf7-+) 45...f3 (better 45...Nh4 46.Kh2 Nf3 47.Kg2 Ne1 48.Kh2-+) 46.Kf2 Re8 47.Re8 Kg5 48.Re6 h5 49.Rd6 h4 50.Rd5 (50.Rd1 b5-+) 50...Kg4 51.Rd4 Nf4 (51...Nf4-+) 0-1. zembelek (2085) - ruter (2070), Rated Blitz game, lichess.org, 2014.

5.c4 c6 6.Nd4 Bg6? (better 6...Nh6!?+-) 7.Ne6+- Qb8 8.cd5 cd5 9.Qc1 (better 9.Nc3!? Bf7 10.Qg4 Be6 11.Qe6 Qe5 12.Qe5 fe5 13.Nd5 Rc8+-) 9...Kf7 (9...Nb6 10.Nc7 Kf7 11.Na3+-) 10.Nc7 e6 11.Na8 Qa8 1–0. Massudy (2565) – soyutcebir (2105), lichess.org/duFMfXRY, 2020.

5.d4 e6 6.a3 Bd6 7.Bd3 Bd3 8.cd3 Ne7 9.e4 0-0?? (9...c6 10.Qe2=) 10.0-0?? (better 10.e5+-) 10...c6= 11.Nbd2 a5 12.ba5 (12.Bc3 ab4 13.Bb4 Qc7=) 12...Ra5 (12...Qa5 13.Qb3=+) 13.Re1 (13.Bc3 Ra7=) 13...Bf4 (13...Qa8 14.Qc2=) 14.g3 (14.Nb3 Ra6=) 14...Bc7 15.e5 (better 15.Nb3 Ra6 16.Nc5 Nc5 17.dc5=) 15...f5?? (better 15...Ng6-/+) 16.Ng5+/- Rf7 (16...Re8!? 17.Ne6 Qc8+/-) 17.Ne6 Qc8 18.Nc7 Qc7 (18...Nf8 19.Bc3 Ra7 20.Nc4 dc4 21.e6+-) 19.e6 Rf6 Black intends f4 20.ed7 Qd7 21.Nf3 f4 22.Ne5 Qh3 23.Qg4 Qg4 24.Ng4 Rf7 25.Ne5 Rf5 (25...Rf6 26.Bc3 Ra8 27.a4+-) 26.g4 Rf8 27.Bc3 Raa8 28.Bb4 (28.Rab1 Rfb8+-) 28...Rfe8 29.Be7 (better 29.Reb1!? Ra4+-) 29...Re7 30.f3 1-0. cipiripi (2245) - shaf (2225), Rated Blitz game, lichess.org, 2015.

5.Nd4 e6 6.Nf5 ef5+= 7.a3 Bd6 8.c4 dc4 9.Bc4 Ne5 10.Be2 Ne7 11.Qb3 Qd7 12.Nc3 c6 13.d4 Ng4 14.h3 Nh6 15.Rc1 Bc7 16.f4 g5 17.Bh5 Ng6 18.g3 Qe7 19.Kf2 0-0-0 20.b5 gf4 21.gf4 Rhe8 22.Rhe1 Qd6 23.bc6 Nf4?? (better is 23...bc6 24.Ne2 Ba5+-) 24.Qb7 (24.ef4 Qf4 25.Kg2 Qg3 26.Kf1 Qh3 27.Kg1 Bh2 28.Kh1 Be5 29.Kg1 Bd4 30.Re3 Be3) 1–0. Fournier,Frederic (1860) – Goube,Nicolas (1740), FRA Coupe, 2005.

5.Nd4 e6 6.g4 Bg6 7.Ne6 Qc8 8.Bg2 c6 9.g5 (9.f4 Bf7 10.Nf8 Nf8+/-) 9...Bf7 (9...Kf7 10.Nf8 Qf8 11.Qg4+/-) 10.Bh3 Be6 11.Be6 Ke7 12.Qg4 fg5 13.Rg1 (13.Bg8!? Rg8 14.Qg5 Kd6 15.Qg3 Ke7 16.Qh4 Nf6 17.Bf6 gf6 18.Qh7 Rg7+/-) 13...h6 14.c4 Qc7 15.cd5 cd5 (better 15...Ngf6!? 16.Qg2 Ne5 17.Be5 Qe5+/-) 16.Nc3+- (16.Bd5?! Ngf6 17.Bf6 Nf6+/-) 16...Ngf6 17.Nd5 Nd5 18.Bd5 Nf6 (18...Qh2 19.f4 Qh4 20.Qh4 gh4 21.Bg7 Bg7 22.Rg7 Kd6+-) 19.Bf6 gf6 20.Qe6 Kd8 21.Qf6 Qe7 22.Qh8 Kc7 (22...Qb4 23.f4! Rc8 24.a3+-) 23.Rc1 Kb6 (23...Kd8+-) 24.Qd4 Ka6 (24...Qc5 25.Rc5 Bd6 26.Rc6 Kb5 27.Qc4 Ka4 28.Qb3 Kb5 29.a4) 25.Bc4 b5 26.Bb5! Kb5 (26...Kb5 27.Qc4 Mate attack) 27.Qc4 Kb6 (27...Ka4 28.Qa6 Kb4 29.Rc4) 28.Qc6 1-0. DEFFM – GuestZYSX, freechess.org, 2021.

5.Nd4 Nh6 6.Nf5 Nf5 7.Bd3 (7.Qg4 g6 8.Bd3+=) 7...Nd6 (better 7...e6!?=) 8.Qh5+- Nf7 9.Qd5 c6 10.Qe6 (10.Qb3 e5+-) 10...Ng5 (10...a5 11.a3+-) 11.Qb3 (11.Qg4+-) 11...Ne5 (11...e5!?+-) 12.Be5+- fe5 13.h4 Nf7 14.Bc4 (14.Nc3 Qd7+-) 14...Nd6+- 15.Be6 Qb6 (15...g6 16.h5 Bg7 17.d3+-) 16.c4 c5 17.bc5 (17.Qa4 Qc6 18.Qc6 bc6+-) 17...Qb3 (17...Qc5 18.Nc3 Qa5+-) 18.ab3 Nf7 19.Nc3 (19.b4 Nd8 20.Bd5 e6+-) 19...Nd8 20.Bg4 h5 (20...e6 21.Ne4+-) 21.Bf3 (21.Nb5 Rb8 22.Bf3 a6+-) 21...e6 (21...Nc6 22.Ke2+-) 22.b4 Be7 (22...Kd7 23.d3+-) 23.Nb5 Kd7 24.Na7 Nc6 25.Ke2 Ra7 (25...Na7 26.Bb7 Kc7 27.Ba8 Ra8+-) 26.Bc6 Kc6 27.Ra7 g5 (27...e4 28.f3 ef3 29.gf3+-) 28.b5 Kc5 29.Rb7 Bd6 (29...Bd8 30.hg5 Bg5 31.Rc7 Kd6 32.b6+-) 30.hg5 Kc4 (30...Rg8 31.Rh5 Kc4 32.d3 Kb4 33.Rb6+-) 31.g6 Rh6 32.g7 Rg6 33.d3 (33.d3 Kd5 34.Rh5 Rg2 35.Kf3+-) 1–0. DEFFM – gunawarman, freechess.org, 2018.

7.Nc3 Nb6? 8.Nb5+- (8.Nf8?! Kf8 9.Be2 Qd7+=) 8...Rb8 9.Nbc7 (9.Nf8?! Kf8 10.Na7 Qd7+/–) 9...Kf7 10.Qf3 Be4 11.Ng5 Kg6 12.Ne4 de4 (12...Qc7 13.Nc3+-) 13.Qe4 Kf7 14.Nd5 (14.Nb5 a6 15.Nc3 e6+-) 14...Nd5 15.Qd5 e6 16.Qb3 Bd6 17.c4 Ne7 18.c5 Bc7 19.Bc4 Nc6 (19...Rd8 20.d3+-) 20.d4 a5 (20...Rd8 21.0-0+-) 21.b5 a4 22.Qa4 Na5 (22...Ra8 23.Qc2 Ba5 24.Bc3 Bc3 25.Qc3+-) 23.0-0 (23.Bd3!? Ra8+-) 23...Nc4 24.Qc4 Ba5 25.d5 ed5 26.Qd5 Qe6 27.Rfd1 Rhd8 28.Qe6 Ke6 29.Rd4 Bc7 30.f4 (30.Rad1 Rd4 31.ed4 Kd5+-) 30...Rd5 (30...Ra8 31.b6 Rd4 32.Bd4+- (32.ed4?! Bf4 33.g3 Be3 34.Kg2 Kd5+-; 32.bc7?! Rd2 33.Bc3 Rc2=)) 31.Rad1 Rbd8 32.f5! Kf5 33.Rd5 (33.Rd5 Rd5 34.Rd5 Ke6 35.e4+-) 1–0. Fournier,Frederic (2370) – Chessgaston (1850), echecsemail.com, 2008.

7.Nc3 Bf7 8.Nf8 Kf8 9.d4 +/–.

7.c4 Bb1 8.Rb1+- Nb6 (8...dc4 9.Bc4 Nb6 10.Bb3+-) 9.cd5 g6 (9...c6 10.e4 cd5 11.ed5+-) 10.Qb3 (10.Nf8?! Kf8 11.Qf3 Qf5+-) 10...Qd7 11.Rc1 (better 11.e4+-) 11...Nd5? (11...Rc8+-) 12.Qd5!! Qd5 (12...c6 13.Qd7 Kd7 14.Bc4+-) 13.Nc7 Kf7 (13...Kd8 14.Nd5 (14.Na8 Qa2 15.Bc3 e5=+) 14...Rc8 15.Rc8 Kc8 16.Bc4+-) 14.Nd5 (14.Na8?! e6 15.a3 Qb3 16.Rc7 Ne7=+) 14...e6 (14...Rd8 15.Rc7 Ke6 16.e4+-) 15.Rc7 Ne7 (15...Be7 16.Bf6! Nf6 17.Ne7+-) 16.Bf6 ed5 17.Bh8 Rc8 (17...b6 18.Ba6+-) 18.Rb7 Rc1 19.Ke2 Rb1 (19...a6 20.Bc3+-) 20.g3 a5 21.Bg2 (better 21.b5 Rb4+-) 21...Rh1 (21...Rb4 22.Bd5 Ke8 23.Rc1+-) 22.Bd5 Ke8 23.Rb8 Kd7 24.Bh1 Nc6 25.Rf8 1–0. GuestYNPC – iTEACHmate, freechess.org, 2018.

7.c4 Nb6!? 8.Nf8 Kf8 9.cd5 Nd5+=.

7.c4 c6 8.cd5+/– cd5 9.Nc3 Bf7 10.Nf8 Nf8 (10...Kf8 11.d4+/–) 11.Rc1 Qf5 (11...Qd8 12.Bb5 Nd7 13.Na4+/–) 12.Qa4 (12.Nb5 Kd8+-) 12...Nd7+/– 13.Nb5 Kf8 (13...Nb6 14.Qa5 Rc8 15.Na7 Rc1 16.Bc1+-) 14.Bd4 (14.Nc7 Nb6 15.Qa5 Rc8+/–) 14...e5 15.Nd6 Qe6 16.Rc7 Qd6 (better is 16...ed4 17.Qd7 Qd7 18.Rd7 Be6 19.Rb7 a5+-) 17.Rd7 (17...Qc6 18.Bc5 Ke8 19.Bb5 Kd7 20.Bc6 bc6 21.Qa6+- (21.Ba7?! Ne7 22.b5 Rhb8 23.bc6 Ke6+-)) 1–0. woschkat (2330) – tonyh (2005), net–chess.com, 2002.

7.Be2 Kf7 8.Nf4 e6 +=.

8.Be2 Bf7 9.Nf8 Kf8 10.0-0+- e5 11.d4 (11.f4 Ke8+-) 11...e4 (11...Qc7 12.a4+-) 12.f3 Bg6 (12...ef3 13.Bf3 f5 14.a4+-) 13.fe4+- de4 14.b5 (14.d5 cd5 15.Qd5 Nb6 16.Qd6 Kf7+-) 14...Ne7 15.Ba3 (15.Rf4+-) 15...c5 (better 15...Ke8!?+-) 16.dc5+- Nc5? (better 16...Ke8+-) 17.Qd6 b6 18.Nd5 Qd8 (18...Qb7 19.Nf6! Bf7+-) 19.Rf6! gf6 (19...Ke8 20.Rg6! Qd6 21.Rd6 Nd5 22.Rd5+-) 20.Qf6 Kg8 (20...Ke8 21.Qh8 Kf7 22.Qf6 Ke8 23.Ne7 Qe7 24.Qc6 Kf7 25.Rf1 Kg7 26.Bb2 Kh6 27.Qa8 Ne6+-) 21.Ne7 (21.Ne7 Qe7 22.Qe7 Nd3 23.Bd3 Bf7 24.Rf1 Kg7 25.Qf6 Kg8 26.Qf7) 1–0. GuestGZFM – jsutour, freechess.org, 2018.

8.Be2 Bf7 9.Nf8+/– Nf8 10.0-0 Nh6+/–.

8.Be2 Bf7 9.Nf8+/– Nf8 10.d4 Nd7 (10...Nh6 11.0-0+/–) 11.0-0 (11.e4 de4 12.Ne4 Nh6+/–) 1–0. Kelish (1940) – Ramiz, internet, 2006.

8.Be2 Nh6!?+=.

8.Ne2 Bh5+/–.

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7).

5.a3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7).

5.Bb5 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Bb5).

5.c4 dc4 6.Bc4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7).

5.c4 c6 6.Nc3 e6 7.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Nc3).

5.c4 c6 6.c5 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.c4 c6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7 5.Be2 c6 6.c4).

5.c4 c6 6.Be2 e6 7.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7 7.Be2).

5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.c4 e6 6.a3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.c4 e6 6.b5 c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5 6.c4 Nbd7).

5.c4 e6 6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.d3 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d3).

5.d4 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d4).

5.Be2 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 Nbd7).

5.Be2 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

5.Be2 e6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

5.Be2 Bf3 6.Bf3 c6 7.0-0 e5 8.d3 Bb4 9.c4 Ngf6 10.cd5 cd5 11.Qb3 Qa5 12.Nc3 Will d5 fall? 12...Nc5 13.Qc2 0-0 (13...Qa6 14.Nd5 Nd5 15.Bd5 Qd3 16.Qd3 Nd3 17.Rab1= (worse is 17.Bb7 Rb8 18.Bc6 Ke7+=)) 14.a3 Bc3 15.Bc3 Qd8 (15...Qc7!?=) 16.Be5+= Rc8 17.Rac1 Qe7? (17...Ncd7!? 18.Bc3 Ne5+=) 18.d4 (18.Bf6 gf6 19.Bd5 Qd7+-) 18...Nce4 (18...Qe6!?+/–) 19.Qc8+- Rc8 20.Rc8 Ne8 21.Rfc1 g6?? (21...Kf8 22.Bg4 A) 22...Qa3?? 23.Bd7 f6 24.Bb8+- (24.Be8?! fe5 25.Bc6 Ke7 26.Bd5 Nd6+-; 24.Re8 Kf7 25.Rf1 fe5 26.Re5 Nd2=); B) 22...f6+-) 22.R1c7 Qe6 23.Rb8 Nd2 (23...Kf8+-) 24.Bd5! (24.Bd5 Qe5 25.de5+-) 1–0. Janek – Martin, internet, 2016.

5.Be2 Bf3 6.Bf3 e6 7.a4 (7.c4!? Ngf6 8.cd5 ed5 9.Qb3+=) 7...Ngf6= 8.b5 b6 (better is 8...Bd6!?=) 9.0-0+/– Bd6 10.c4 0-0 11.cd5 ed5 12.g3 Ne5 (better is 12...Re8!?+/–) 13.Be5+- Be5 14.d4 Bd6 15.Qb3 Be7 16.Nc3 Rc8 17.Nd5 Bd6 18.e4 Nd5 19.Qd5 (19.ed5?! Qd7+/–) 19...Qe7 20.e5 Bb4 21.Qc4 Ba5 22.Rac1 Rfd8 (22...Qa3 23.Be4+-) 23.Rfd1 c5 (23...Re8 24.Bg4 Rcd8 25.Qc7+-) 24.bc6 Rc7 (24...g6 25.Rd3+-) 25.Qe2 Qb4 (25...f6+-) 26.d5 Qa4 (26...b5 27.d6 Rcc8 28.ab5+-) 27.d6 Rcc8 (27...Rc6 28.Bc6 b5 29.Bd5+-) 28.e6 White prepares the advance d7 28...fe6 29.Qe6 Kh8 30.d7 1–0. Janek – Bonnie, internet, 2016.

5.Be2 Bf3 6.Bf3 Ngf6 7.0-0 e5 8.b5 e4 9.Be2 Bd6 10.c4 h5 (10...dc4!? 11.Bc4 Ne5=) 11.cd5+= Bh2? (better is 11...Nd5 12.d3 ed3 13.Qd3 N5f6+/–) 12.Kh2+- Ng4 13.Kh3 Nde5 14.f3 (14.Bg4? hg4 15.Kg3 Qd6-+) 14...Ng6 15.Qe1 Qd7? (15...Qd6 16.Rh1 ef3 17.gf3 Nf6+-) 16.fg4 hg4 17.Kg3 Qd6 18.Rf4 (better is 18.Kf2 Nf4 19.Rg1+- (19.ef4?! Qf4 20.Bf3 gf3+-)) 18...Nf4= 19.ef4 Qh6 20.Kf2 Qf4 21.Kg1 g3 22.Bf3 Qh6 (22...0-0-0 23.Be4 Rde8-/+) 23.Qe4+/– Kd8 24.Kf1 Qh1? (better is 24...Re8 25.Bg7 Qh1 (worse is 25...Qg7 26.Qh4 f6 27.d6+=) 26.Ke2 Re4 27.Be4 f5 28.Bf6 Kd7+=) 25.Ke2+- Re8 26.Bg7?? (better is 26.Be5 f6 27.Na3+-) 26...Re4+= 27.Be4 Kd7 28.Na3 Qh5 29.Bf3?? (29.Kd3 Re8 30.Bc3 Re4 31.Ke4 Qe2 32.Kd4 Qg2 33.Kc4-/+) 29...Re8-+ 30.Kd1 Qf5 (better is 30...Qh1 31.Kc2 Qh7 32.d3 Qg7-+) 31.Bc3 Qd3 32.Bg4 (32.Kc1 Re4 33.Kb2 Rf4-/+) 32...Kd6 33.Bf3 (33.Bb4 Kd5 34.Bf3 Ke6 35.Bc3-/+) 33...a6 (better is 33...Re3! 34.Bb4 Ke5-+) 34.ba6 Qa6 35.Bb4 Kd7 36.Bg4?? (better is 36.Rb1+=) 36...Kd8-+ 37.Bf3 (37.Rc1 Re4 38.Bf3 Rb4-+) 37...Qf1 38.Kc2 Qa1 (38...Qa1 39.Kb3 Qf1-+) 0–1. cristero (2490) – luisgustagomes (2450), net–chess.com, 2013.

5.Be2 Bf3 6.Bf3 Ngf6 7.0-0 e5 8.c4 e4 9.Bg4 (9.Be2 dc4 10.Bc4 Bb4=) 9...dc4=+ 10.Qc2 b5 (10...Qe7 11.Bf5=+) 11.a4 c6 12.Bf5 Qe7 (12...Bb4 13.Be4 Rc8 14.ab5 cb5 15.Ra7=) 13.Nc3 Now all is on e4 13...g6 (13...Ne5 14.ab5 Nd3 15.bc6 Qe5+-) 14.Bd7+- Qd7? (14...Kd7 15.ab5 Bg7 16.bc6 Kc6 17.Ra6 Kd7 18.Qa4 Kd8 19.Qa5 Qc7 20.Rd6 Nd7 21.Qc7 Kc7 22.Nb5 Kb7 23.Bg7 Rhd8+-) 15.Ne4 Ne4 16.Qe4 (16.Bh8?! Qd3 17.Qb2 Bd6+-) 16...Be7 (16...Qe6 17.Qe6 fe6 18.Bh8 Bb4+-) 17.Bh8 0-0-0 (17...Qd5 18.Qd5 cd5 19.Bc3 ba4 20.Ra4+-) 18.ab5 (better 18.Bd4 Qe6 19.Qb1+-) 18...cb5 (18...Rh8 19.Qc4 Qc7+-) 19.Qa8 Kc7 1–0. DEFFM – GuestTJQT, freechess.org, 2019.

5.h3 Bh5 6.g4 Bg6 7.Bg2 Ngf6 8.a4 e6=+ 9.g5 Ne4 10.h4 Bh5 11.d3 Nd6 12.Nbd2 e5 13.c4 dc4 14.e4 cd3-+ 15.Qb3 Bf3 16.Bf3 g6 17.Qd3=+ Bg7 18.Nc4 Nc4 19.Qc4 Nb6 20.Qc2 Qe7 21.Ba3 0-0-0 22.0-0 Qe6-/+ 23.Kh2 Rd4 24.Rg1 Qe8 25.Rac1 (25...Rc4 26.Qb3 Rc1 27.Rc1-/+; 25.a5 Nc4 26.Rgc1 Qd8=+). ZeitNot2002 (1755) – Ausero, Dos Hermanas internet Section, 2003.

5.a3 Ngf6 6.Be2 e6 7.0-0 Be7 8.c4 c6 9.Nd4 Bh7 10.cd5 cd5 11.d3 0-0 12.Nd2 a6 13.Rc1 Qb6 14.Qc2 Rfc8 15.Qc8 Rc8 16.Rc8 Bf8 17.N4b3 Qb5 18.Rc3 Qb6 19.Rfc1 e5 20.d4 ed4 21.Nd4 a5 22.Rb3 ab4 23.ab4 g5 24.Rc8 Kg7 25.Bb5 Ne5 26.f4 gf4 27.ef4 Nc6 28.Bc6 bc6 29.Rc6 Qb7 30.Nf5 Bf5 31.Rf6 Qb6 1–0. Machete99 – guest876, ICC, 2002.

5.Bb5 a6 6.Bd7 Qd7 =.

5.Bb5 e6 =.

5.c4 dc4 6.Bc4 Ngf6 (6...e6 7.0-0=) 7.0-0 e6 8.a3 Bd6 (8...a5 9.Nd4 Bg6 10.b5=) 9.Nc3 (9.Nd4 Bg6=) 9...c6 10.Re1 (10.d3 0-0=) 10...Qc7 (10...Nb6 11.d3 a5 12.e4 Nc4 13.dc4 ab4 14.ab4 Ra1 15.Qa1+- (< 15.Ba1 Ne4 16.Ne4 Be4+=)) 11.d4 Bg4 (11...Nb6 12.Bd3 Bd3 13.Qd3+=) 12.h3+= Bh5 13.g4 (13.e4 Bh2 14.Kh1 Bf4+=) 13...Ng4 (better is 13...Bg6!?=) 14.hg4+/– Bg4 15.Be2 (15.Ne4 h5+/–) 15...g5 (15...h5 16.Rc1+/–) 16.e4 (16.d5 Bf3 17.Bf3 Bh2 18.Kg2 Be5 19.dc6 bc6+-) 16...f6 17.Nd2 Be2+/– 18.Qe2 0-0-0 19.Rac1 Kb8 20.Qg4 Bh2+= 21.Kg2 Bf4 22.Rc2+/– Qd6 23.Na4 h5= 24.Qe2 h4 25.Nc5 h3 26.Kh1 Rh4?? 27.Nd7?? Rd7 28.Rg1 f5 29.Nf3 Rg4 30.Rg4 fg4 31.Ng5 Bg5=+ 32.Qg4 Qf4 33.Qf4 Bf4=+ 34.Re2 e5!-+ 35.Re1 ed4 36.Bc1 Be5 37.f4=+ Bg7 38.e5 d3 39.Bd2+= Bh6 40.Kh2 Rh7 41.e6 Bf8 42.Re3+- Re7 43.Kh3 Bh6 44.Re4 Kc7+/– 45.Kg4 Kd6? 46.Kh5 Re6 47.Re6 Ke6 48.Kh6 Kf5 49.Kg7 b6 50.Kf7 c5 51.b5 c4+= 52.Ke7 Ke4 53.Ke6 Kd4-/+ 54.f5 c3 55.Bc3 Kc3 56.f6 d2 57.f7 d1Q 58.f8Q Qb3 59.Kd7?? Qb5 60.Kd8 Qd5 61.Ke8 Qa8 (62.Ke7 Qf8 63.Kf8 Kb3-+) 0–1. Larsen,A – Pedersen,J, Tromsoe, 1999.

5.c4 e6 6.Qb3 Nb6 (6...Ngf6 7.Nd4 Bg6 8.Nc3-/+) 7.c5+= Nd7 8.Nd4 c6 (8...Ne7 9.Nc3+=) 9.Nf5+- ef5 10.Bd3 Qg5 11.0-0 Ngf6 12.Qc2 g6 13.f4 Qh4 14.Na3 a6? (better 14...Ng4 15.h3 Ngf6+=) 15.Rf3+- Bg7?? (15...a5 16.Rh3 Qg4+-) 16.Rh3 Qh3 (16...Qg4 17.Re1+-) 17.gh3 0-0 18.Kg2 Rfe8 (18...a5 19.b5+-) 19.Rg1 Ne4 (19...a5 20.b5+-) 20.Be4 Re4 (20...fe4 21.Bg7 Kg7 22.Qc3 Kh7 23.Nc2+-) 21.Bg7 Kg7 22.Qb2 Kh7 23.Nc2 Rae8 24.Nd4 Nf8 (24...h5 25.Qc3+-) 25.Kf2 Nd7 (25...f6 26.h4 Nd7 27.h5+-) 26.Nf5! Rc4 (26...gf5 27.Qg7) 27.Qg7 1–0. Lejel – 12Cjtipq. internet, 2019.

5.c4 e6 6.cd5 ed5 7.Be2 Ngf6 8.b5 Bd6 9.0-0 0-0 10.Nc3 c6 11.bc6 bc6 12.d3 Rb8 13.Rb1 Qe7 14.Nd4 Qe5 15.g3 c5 (15...Rbc8!?=) 16.Nc6+/– (16.Nf5?! Qf5 17.a4 Be5=) 16...Qe6 17.Nb8 Bb8 18.Re1 Bh3 19.d4 c4 20.Ba3 Ng4?? (better is 20...Rc8+/–) 21.Bf8+- Nf8 22.Rb8 h5 23.Bg4 Bg4 24.Qb1 Qf6 25.Rf8! Kf8 26.Qb8 Ke7 27.Nd5 (27...Kd7 28.Qa7 Ke8 29.Nf6 gf6 30.Qa8 Ke7 31.Qc6 Kf8 32.Qc4 Be6 33.Qc5 Ke8 34.Rb1 Bd5 35.Qd6 Bb3 36.Rb3 h4 37.Rb8#) 1–0. Fritz 10 – NN, 2007.

5.c4 Ngf6 6.Nc3 dc4 7.Bc4 e6 8.a3 Be7 (8...a5 9.b5=) 9.0-0 c6 (9...Nb6 10.Be2=) 10.Nd4 Bg6 11.h3 (11.d3 Ne5=) 11...0-0 (11...Ne5 12.Be2=+) 12.Be6= Qc7 (better is 12...fe6!? 13.Ne6 Qb6 14.Nf8 Rf8=) 13.Bb3 (13.Bf5 Bf5 14.Nf5 Bd6+/–) 13...Qd6 (13...Bd3 14.Re1+=) 14.Bc2+/– Ne5 (14...a5 15.b5+/–) 15.Bg6 Ng6 16.Nf5 (16.d3 Rfe8+/–) 16...Qd7 17.Ne7 Ne7 18.Qc2 Nfd5 19.Rad1 Rad8 20.d4 Nc3 21.Qc3 Nd5 22.Qc2 Rfe8 23.Rfe1 Qc7 24.e4+- Nf4 25.b5 Qd6 26.bc6 bc6 27.e5 Qd5 28.Qe4 Ne6 29.Qd5 Rd5 30.Re2 c5=+ 31.g3 cd4 32.f4 Red8 33.Red2= d3 34.Kf2 Nc5 35.Ke3 Kf8? 36.Bc3+/– Ke8 37.Bb4 Ne6 38.Rd3+- Rd3 39.Rd3 g6 40.Rd8 Kd8 41.Ke4 Kd7 42.g4 h5 43.gh5 gh5 44.Kf5 a6 45.Ke4 Kc6 46.Bd2 Kd7 47.f5 Nc5 48.Kd5 Nb7 49.Be3 Na5 50.Kc5 Kc7 51.Bf4 Nb7 52.Kd5 Kd7 53.Bg5 Na5 54.Kc5 Kc7 55.e6 fe6 56.fe6 Nb7 57.Kd5 Na5 58.e7 Kd7 59.Kc5 Ke8 60.a4 Nb3 61.Kb6 a5 62.Kb5 Kd7 63.Kc4 Na1 64.Kc3 (64...Ke8 65.Kb2+-) 1–0. Spiegel,Matthias – Busch,Christian, Germany, 2005.

5.c4 Ngf6 6.cd5 Nd5 7.a3 c6 8.d3 Bg4 9.Be2 Bf3 (9...a5 10.b5=) 10.Bf3+= (worse 10.gf3 a5=+) 10...N5f6 11.0-0 e6 12.b5 (12.Nd2 Bd6+=) 12...Rc8 (12...cb5!? 13.Bb7 Rb8+=) 13.bc6+- bc6 14.Nd2 Be7 15.Rc1 Qb6 16.Qc2 Nd5 (16...0-0!?+-) 17.Nc4 Qb8 (17...Qc7 18.Bg7 Rg8 19.Bb2+- (19.Bh6?! Rh8+=)) 18.Bg7 Rg8 19.Bh6 (better 19.Rb1!? Qc7 20.Bb2+- (20.Bh6?! Rg6 21.Bf4 Nf4+-)) 19...Rh8+= 20.Rb1 Qh2?? (better 20...N7b6 21.Bf4 Nf4 22.ef4 Qf4+-) 21.Kh2+- 1–0. GuestVQYP – GuestJDNJ, freechess.org, 2018.

5.Be2 e6 6.0-0 Ngf6 7.b5 (7.a3 Bd6=) 7...Bd6 8.c4 (8.Nd4 Be4=) 8...dc4 9.Bc4 0-0 10.Nc3 (10.d3 Nb6 11.Bb3 a6=) 10...Rc8 (10...Nb6 11.Be2=+) 11.d3= Nb6 12.e4? (better is 12.Bb3!?=) 12...Nc4-/+ 13.dc4 Be4 (13...Ne4 14.Re1 Nc5 15.Qe2-/+) 14.Ne4 Ne4 15.Qd4 Qf6 (15...Nf6 16.Qa7 Rb8 17.c5+=) 16.Qe4 Qb2 17.Qb7 Bc5 18.Rae1 (18.Rad1 Qa2 19.Qc6 A) 19...Qc4? 20.Rc1 Bf2 21.Kf2 Qc6 22.Rc6+- (22.bc6?! Rb8+=); B) 19...Qa3=) 18…Qa2 ½–½. Van Rooijen,Peter (1715) – Istomin,Sergei (1780), SI–2003–0-00002, 2003.

6.0-0 e6 7.b5 Bd6 8.d3 0-0 9.Nbd2 (9.c4 dc4 10.dc4 Nc5=) 9...c5 (9...e5 10.c4 c6 11.d4=) 10.bc6 (10.c4 a6=) 10...bc6 11.Bf6 (11.Nd4 Bh2 12.Kh2 Qb8 13.Kg1 Qb2 14.Nc6 Qa3+=) 11...Qf6+= (worse is 11...gf6 12.c4+=) 12.Nd4 c5 13.Nf5 ef5 (13...Qf5 14.c4+=) 14.Bf3 (14.c4 d4 15.Re1 de3 16.fe3 Rab8+=) 14...Be5 (14...Rab8 15.g3 (15.Bd5? Qe5 16.Bf7 Rf7-+) 15...Be5 16.Rc1=) 15.Rb1 (15.Bd5 Rab8=) 15...Qd6 16.g3 (16.c4 Rab8=) 16...Rab8 17.Qe2 (17.Nb3 Bc3=) 17...Bc3 18.Rb3 Rb3 19.cb3 Ne5 (19...Re8 20.Rc1 Bd2 21.Qd2=) 20.Nb1 Nf3 (20...Ba1 21.Bg2=) 21.Qf3+= Bf6 (21...Bb2 22.Qf5 Rd8 23.Rd1=) 22.Qf5 Re8 23.Rc1 g6 (23...d4 24.Nd2 de3 25.fe3 Re3 26.Rc5 (26.Qc5? Qd3 27.Qc8 Kh7-+) 26...Rg3 27.hg3 Bd4 28.Kg2 Qc5 29.Qc5 Bc5 30.Nf3=) 24.Qf3 Kg7 25.Nd2 (25.Rc2 Ba1+=) 25...Re5 (25...a6 26.h3+=) 26.Qe2 (26.Qd1 Re8+/–) 26...Re7 (26...Re8 27.Nf3+/–) 27.Nf3 Rc7 28.Kg2 (28.d4 cd4 29.Rc7 Qc7 30.Nd4 Qc1 31.Kg2 Qc3+/–) 28...a5 (28...Qa6 29.Qd2+/–) 29.a4 (29.Qd2 a4+/–) 29...Qb6 30.Qc2 Qc6 (30...Qb4 31.d4! Be7 32.Qd1+/–) 31.d4 c4 32.bc4 (32.Nd2 Be7+/–) 32...dc4 (32...Qc4 33.Qc4 Rc4 34.Rc4 dc4 35.Kf1+/–) 33.e4 Be7 (33...Qd7!?+/–) 34.d5+- Qd7 (34...Qa6 35.Ne5 Ba3 36.Rd1+-) 35.Qc3 (35.Ne5 Qe8 36.Nc6 Bd6+-) 35...f6 (35...Kg8 36.Qa5 Rc5 37.Ne5+-) 36.Qa5 Ra7 (36...Ba3 37.Rc2 Qe7+-) 37.Qb5 Qg4 (37...Qb5 38.ab5 Ra4+-) 38.Rc4 (worse is 38.Qc4 Bd6+-) 1–0. Melderis,Uldis (2010) – Mikalsen,Bengt Arne, Albena Chess Festival – B Tournament, 2016.

6.0-0 e6 7.b5 Bd6 8.d3 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Qa8 12.Nbd2 Qa7 (12...0-0 13.c4=) 13.c4 (13.e4!? de4 14.de4 Ne4 15.Ne4 Be4 16.Bg7=) 13...0-0= 14.Qb1 Ra8 15.e4 de4 16.de4 Bh7 17.Bd3 Bb4?? (17...e5 18.Bc3=) 18.Nb3 (better is 18.Qb4 Nc5 19.Bf6 Nd3 20.Qb1+-) 18...Qa2= 19.e5 Bd3 20.Qd3 Ra3? (better is 20...Nc5 21.Nc5 Bc5+=) 21.ef6+- Nf6 (21...Bd6 22.Nfd2 Nc5 23.Qb1 Nb3 24.Qa2 Ra2 25.Nb3+-) 22.Qd8 Kh7 23.Bf6 gf6 (23...Rb3 24.Qc7 Rb1 25.g3 Rf1 26.Kf1+-) 24.Nbd4 (24.Qf6 Bc3 25.Qf7 Bg7+-) 24...Qa1 (24...Kg7 25.Qc7 Kg8+-) 25.Nc2 (better is 25.Qf6 Bf8 26.Qf7 Bg7 27.Qc7+-) 25...Ra8 (25...Qc3 26.Na3 Ba3 27.Qc7+-) 26.Qc7 (better is 26.Qd3 Kg7 27.Ra1 Ra1 28.Na1 b6+-) 26...Qc3 27.Qf7 Kh8 28.Ne3 (28.Nb4 Rg8 29.Qe6 Qf3 30.Qg8 Kg8 31.gf3 b6+-) 28...Rg8 29.Rd1 Qd3 (29...Rg7 30.Rd8 Kh7 31.Qe6 Qc1 32.Rd1+-) 30.Nh4 (30.Rd3 Rf8 31.Qg6 Rc8 32.Rd7 Be7 33.Re7 Rc4 34.Qg7) 30...Qe4 (30...Qh7 31.Qf6 Qg7 32.Qe6+-) 31.Qf6 (better is 31.Nef5! Bd2 32.Ne7 Rg7 33.Nhg6 Kh7 34.Nf8 Kh8 35.Neg6 Qg6 36.Ng6 Kh7 37.Nf8 Kh8+-) 31...Rg7 32.Qh6 Qh7 33.Rd8 Rg8 (33...Bf8 34.Rf8 Rg8 35.Ng6) 34.Ng6 1–0. Starr,Albert Martin – Adkins,Rico (1685), San Francisco MI Carroll Capps Mem, 2005.

6.0-0 e6 7.b5 Bd6 8.d3 e5 9.Nbd2 =.

6.c4 c6 (6...dc4 7.Bc4 e6 8.a3=) 7.0-0 e6 8.b5 (8.cd5 cd5 9.a3 a5=) 8...Bd6 9.Nh4 (9.Nd4 Bh7=) 9...Bh7 10.f4 (10.cd5 Nd5 11.Nf3 0-0=) 10...Ne4 (10...g5!? 11.Nf3 gf4 12.cd5 cd5 13.ef4 Bf4-/+) 11.Nf3= (11.Bg7? Rg8 12.d3 Rg7 13.cd5 cd5 14.de4 Qh4 15.ed5 e5-+) 11...0-0 12.d3 Nef6 13.a4 Ng4 (13...dc4 14.dc4 Qc7 15.a5=) 14.Qc1 e5 (14...Nc5 15.Rd1=) 15.h3+= e4 16.hg4 ef3 17.Rf3 Re8 18.Qc3 Do you see the mate threat? 18...f6 (18...Nf6!?+=) 19.cd5+- cd5 (19...cb5 20.ab5 Rc8 21.Qd2+-) 20.Qd4 (20.Qd4 Bc5 21.Qd5 Kh8 22.d4+- (worse 22.Qb7 Be3 23.Re3 Re3=); 20.Qb3 Kh8 21.Qd5 Bc5+-) 1–0. GuestDTRL – GuestVZMF, freechess.org, 2020.

6.d3 e6 7.a3 Bd6 8.0-0 0-0 9.c4 Be7 10.c5 c6 11.Nc3 Re8 12.Qc2 Bg6 13.e4 de4 14.de4 b6 15.cb6 ab6 16.Rfd1 Qb8 17.Bd3 (17.Rd2 c5 18.b5 Rd8+=) 17...Rd8 18.Qe2 e5 ½–½. Satka,Martin – Roellig,Wolfgang, Brandenburg–ch Seniors, 2004.

5.a3 ef4 6.ef4 Qh4 7.g3 Qe7 8.Kf2 Ngf6 9.Nc3 a5 10.Nf3 ab4 11.ab4 Ra1 12.Qa1 =+.

5.Nc3 a5 6.Nd5 c6 7.e4 Bg6 8.Nc7 Qc7 9.f5 ab4 10.fg6 hg6 11.Bc4 Ngf6 12.Qe2 -/+.

5.Nc3 a5 6.fe5 Ne5 7.b5 Bd6 8.Nf3 Bg4 9.Be2 Nf3 10.Bf3 Qh4 11.Kf1 Nf6 12.Kg1 =+.

5.Nc3 c6 6.a3 Nh6 7.Nf3 ef4 8.ef4 Qc7 9.g3 0-0-0 10.Be2 Re8 11.0-0 Be7 12.Rb1 =+.

5.Nc3 ef4 6.Nd5 fe3 7.Qe2 Qh4 8.Kd1 Qe4 9.Ne3 Be6 10.a3 0-0-0 11.Nf3 f6 12.Nd4 =.

5.fe5 Bb4 6.e6 Ndf6 7.ef7 Kf7 8.Nf3 Nh6 9.Ne5 Ke6 10.Be2 Bd6 11.Nf3 Kf7 12.0-0 +=.

5.fe5 Qh4 6.Ke2 Qb4 7.Qc1 Qe7 8.Nf3 Bg4 9.d4 f6 10.ef6 Ngf6 11.c4 c6 12.Nbd2 -/+.

5.Nf3 ef4 6.ef4 Ngf6 (6...Bb4?? 7.Bg7 Qe7 8.Qe2 Bc2 9.Bh8+-) 7.a3 c5 (better is 7...Bd6 8.Be2 Bf4-/+) 8.b5? (better is 8.Nc3!?+=) 8...Bd6-+ 9.g3 (9.Bd3 Bd3 10.cd3 0-0-+) 9...0-0 10.Be2 Qb6 11.Be5 (11.0-0 c4 12.Kh1 Rfe8-+) 11...Rfe8 (11...Ne5 12.fe5 Be5 13.Ne5-+) 12.Bd6 Qd6 13.0-0 Bc2! 14.Qc2 Re2 15.Nc3 Re7 16.Qf5 (16.Rae1 Rae8-+) 16...Rae8 17.a4 (17.Qd3 c4 18.Qd4 Nc5-+) 17...d4 (17...c4 18.Rac1-+) 18.Nd1 (18.Qd3 Re6 19.Nd1 Nb6-+) 18...Qd5 (18...c4!? 19.Rc1 Rc8 20.Nf2-+) 19.Qd5 Nd5 20.Nf2 N7f6 21.Rfc1 b6 22.a5 Nb4 23.ab6 ab6 24.Ne5 Nfd5 25.Ra4 (25.Nc4 g6-+) 25...f6 (25...g5 26.Nfd3-+) 26.Nf3 (26.Nc4 h5-+) 26...Re2 27.Rd1 Nc7 28.Nd4 Rf2 (28...cd4?! 29.Rb4 Rd8 30.Kf1=) 29.Kf2 (29.Rb4 Rf4 (29...cb4?! 30.Kf2 Re4 31.Nc6=) 30.gf4 cb4-+ (30...cd4? 31.Rc1 Ne6 32.Re1+-)) 29...Nd3 30.Kf1 Nb2 (30...Nb2 31.Ra7 Nd1-+ (31...cd4?! 32.Re1 Re1 33.Ke1 Nb5 34.Ra6-/+); 30...cd4?! 31.Rd4 Nc5 32.Kg1+=) 0–1. Deus Filho,Joaquim De (2025) – Nikolic,Jovane (1745), Sao Paulo Open Grupo B – Sub2050, 2014.

7.Ba3 Qe4 8.Bf8 Kf8 9.Nf3 Ne5 10.Bg2 Nf3 11.Bf3 Qc2 12.Qc2 -/+.

7.Bd4 c5 8.Bc3 Qe4 9.Nf3 Qc2 10.Qc2 Bc2 11.Be2 c4 12.0-0 h6 (12...Nc5!?-/+) 13.Nd4+= Be4 (13...Bg6 14.e6 Nc5 15.ef7 Bf7 16.Nb5+=) 14.Nb5= Rb8 15.Na7 (15.e6 Ndf6 (worse is 15...fe6 16.Nc7 Kd8 17.Ne6 Ke7 18.Nf8 Rf8 19.Bb4 Ke8 20.Bf8 Nf8 21.Nc3+/–) 16.Be5 Rd8 17.ef7 Kf7 18.Na7 Bb4=) 15...b5 (15...Ne7!? 16.Nb5 Nc6 17.Nd6 Bd6 18.ed6 Nde5-/+) 16.e6+= Ndf6 (16...fe6 17.Bh5) 17.ef7 Kf7 18.Nc6 (18.Bf6!? Nf6 19.Nc3+=) 18...Rb6= 19.Ne5 Ke8 20.Bd4 Rb7 (20...Re6 21.Nc3 Bd6 22.Ne4 Be5 23.Be5 Re5 24.Nd6 Ke7 25.Nb5+/–) 21.Nc3+/– Bd6 22.Ne4 Be5 23.Be5 Ne4 24.Bh5 Kd7 25.Rf7 (25.Bg7 Rh7 26.Bd4 Ne7+/–) 25...Kc6 (25...Ne7 26.Bg4 Kc6 27.Rg7=) 26.Rf8 Nd2 (26...Re7 27.Be8 Kb7 28.Bc3+=) 27.Rc8+/– Kd7 28.Bg4 Ke7 29.Bg7 Rh7 30.Bc3 Nf6 31.Bf5+- Nde4 32.Bb4 Kf7 33.Rf1 Kg7 34.Bf8 Kh8 35.Be4 de4 36.Bh6 Ng8 37.Rg8! Kg8 Decoy theme: g8 38.Rf8# 1–0. Raedisch,F – Zitzmann,H, corr FRG–Cup4 qual, 1957.

8.d4?? Qh1-+ 9.Nf3 Bc2! 10.Qd2 (10.Qc2 A deflection 10...Qf3) 10...Bd3 (better is 10...Bb1 11.Rb1 Qf3 12.Rb7-+) 11.Qd3 Qf3 12.Nd2 Qg4 (12...Qh1 13.Qe2 Ba3 14.Qg2 Qg2 15.Bg2-+) 13.Be2 (13.Qb5 Qg5 14.Qb7 Qe3 15.Kd1 Rd8 (worse is 15...Qc3 16.Qa8 Ke7 17.Nb3-+) 16.Qc7 Bc5 17.dc5 Qc3-+) 13...Qe6 14.Rb1 Be7 (better is 14...Rb8!? 15.e4-+) 15.Rb7 Nh6 (15...Qc6 16.Rb3-+) 16.Rc7 (16.Qa6 Nb6 17.Bb5 Kd8 18.Ra7 Ra7 19.Qa7 Bg5-+) 16...0-0 (16...Qb6 17.Rd7 Kd7 18.e4 de4 19.Qb5 Qb5 20.Bb5 Kc8 21.Ba6 Kc7 22.Ne4-+) 17.Bd1 (17.e4 Nb6-+) 17...Rfc8 18.Rc8 Rc8 19.Bc2 g6 20.e4 (20.Bb3 Qc6 21.Bb2 Bb4-+) 20...Qc6 (20...de4!? 21.Ne4 Qa2 22.h4-+) 21.Nb1 Nb6 (21...Nb6 22.Qe2 Kg7-+) 0–1. Rabold,Hans – Pietrzak,Janusz, corr ICCF EU–ch GT134, 1977.

8.Nf3 Qc2 9.Qc2 Bc2 10.d3 -/+.

8.Nf3 Qc2 9.Qc2 Bc2 10.Be2 Nc5 11.0-0 Bd3 12.Bd3 Nd3 13.Ne1 Ne1 14.Re1 Be7 15.d3 f6 (15...c6 16.Rc1-/+) 16.Nd2 (16.e4 fe5 17.Be5 de4 18.Bg7 0-0-0 19.Bh8 ed3+-) 16...fe5 (16...f5 17.Reb1 Rb8 18.Kf2-/+) 17.Be5 Bf6 18.Bf6 Nf6 19.e4 de4 20.de4 (20.Ne4 0-0-0-/+) 20...0-0-0 (better is 20...Rd8 21.Rad1 Rf8-/+) 21.e5? (better is 21.Rad1-/+) 21...Rd2-+ 22.ef6 gf6 23.Rf1 (23.Re7 Kd8 24.Rf7 a6-+) 23...Rf8 24.Kh1 (24.Rf2 Rf2 25.Kf2 Rd8-+) 24...c5 25.Kg1 (25.Rac1 Kd7-+) 25…Kc7 (26.Rf2 Rfd8-+; 25...c4 26.Rac1 b5 27.Rf5-+) 0–1. Hasler,Ulrich – Andersson,Lars H, corr 3GMM–03, 1995.

8.Nf3 Qc2 9.Qc2 Bc2 10.e6 fe6 11.Nd4 Bf5 12.Nf5 -/+.

5.a3 Ngf6 6.Nf3 a5 7.b5 a4 8.c4 (8.Be2 Bg4=) 8...Nb6 9.cd5 ed5 10.Nc3 (10.Bd4 c5 11.bc6 bc6=) 10...Be7 (10...Bc5 11.Be2=+) 11.Be2 0-0 12.0-0 Re8 13.Nd4 Bc8 14.Bd3 Bc5 15.Nf5 (better 15.Nce2!?=) 15...Bf5-/+ 16.Bf5 d4 17.ed4 Bd4 18.Kh1 Nbd5 (18...Nc4 19.Qc1 g6-+) 19.Rc1 Nc3 20.dc3 Be3 21.Qd8 Rad8 22.Rce1 (22.Rcd1 Rd1 23.Rd1 Bf4=+) 22...Bf4 (22...Rd5!? 23.g4 Rb5-/+) 23.c4=+ Re1 24.Re1 Bd6 (24...Ne8 25.g3 Bd2 26.Re2=+) 25.g4 (25.Bf6 gf6 26.g3 Bf8=) 25...Ne8 (25...Nd7 26.Bd7 Rd7 27.Re8 Bf8 28.Bc3=) 26.g5 (26.Be4 Bc5=+) 26...g6 (26...Bf4 27.Bc1 Bc1 28.Rc1=+) 27.Bg4 (27.Bc2 Bf4=) 27...Ng7 (27...Bf4 28.Bf3-/+) 28.Bf3 (28.Rd1 Ne6=) 28...b6 29.Bd5 Nf5 30.Kg2 Bf4 31.Rf1? (better 31.Bf6 Rf8 32.Re4=) 31...Bg5 32.Be4?? (better 32.Kf3-+) 32...Ne3 33.Kf2 Rd2 34.Kf3 (34.Kg1 Rb2 35.Rf2 Nc4 36.Rb2 Nb2-+) 34...Nf1 35.Bc3 (35.Bc1 Nh2 36.Kg3 Nf1 37.Kg4 Rd4 38.Bg5 Re4 39.Kf3 Rc4-+) 35...Rh2 36.Bd5 (36.Bb4 Bc1-+) 36...Rh3 37.Ke4 (37.Kg2 Rc3 38.Kf1 Ra3 39.Kg2-+) 37...Rc3 (37...Re3 38.Kd4 Bf6) 38.c5 Nd2 (38...Re3 39.Kd4 Bf6 40.Kc4 Nd2 41.Kb4 Bc3 42.Ka4 Rd3 43.Bf7 Kf7 44.cb6 Rd4) 39.Ke5-+ Rc5 40.Kd4 Rd5! 41.Kd5 Be7 (better 41...h5 42.Kc6 Bf4 43.Kd7-+) 42.Kd4 Ba3 43.Kd3 Bc5 44.Kd2 f5 45.Kc3 White threatens to counter with a3 45...Kf7 46.Kc4 If White now only could play a3... 46...Ke6 47.Kd3 Kd6 48.Ke2 Kd5 (48...a3 49.Kf3 a2 50.Ke2 a1Q 51.Kd3 Qb2 52.Kc4 Qc2) 49.Kf3 Kc4 (49...a3 50.Kg2 a2 51.Kh1 a1Q 52.Kg2 Qg1 53.Kh3 h5 54.Kh4 Qg4) 50.Ke2 Kb5 (50...a3 51.Kf1 a2 52.Ke1 a1Q 53.Ke2 Qb2 54.Ke1 Kd3 55.Kf1 Qe2) 51.Kd2-+ Kb4 52.Kc2 If White now would get a3 in, he might survive 52...Ka3 53.Kb1 Bd4 (53...Kb3 54.Kc1 a3 55.Kd2 a2 56.Ke2 a1Q 57.Kf3 Qf1 58.Kg3 g5 59.Kh2 Bd6) 54.Kc2-+ Ka2 55.Kd3 a3 56.Kc4 Kb2 57.Kb5 a2 58.Kc6 a1Q 59.Kb7 Qa5 60.Kb8 b5 61.Kc8 c5 62.Kd7 Be5 63.Ke6 (63.Kc6 Qa6 64.Kd7 Qd6 65.Ke8 Bf6 66.Kf7 Qe7 67.Kg8 Qg7) ½-½. pacal56 (2135) - ignacy_m (2225), Rated Blitz game, lichess.org, 2015.

5.Nf3 Bb4?? 6.Bg7 Bc2 7.Qc2 +-.

5.g4?? Qh4-+ 6.Ke2 Bg4 7.Nf3 Bf3 8.Kf3 Qh5 (8...Qh5 9.Kf2 Qd1-+) 0–1. De Jong,Robert – Van der Riet,Anthonie A, corr Netherlands, 1968.

6.a3 c5 =+.

6.b5 Nb6 7.Be2 c5 8.bc6 bc6 9.Nd4 c5 (9...Na4!? 10.Ba3 Ba3 11.Na3 Nb6=) 10.Nf5+= ef5 11.Bb5 Nfd7 12.0-0 a6 (12...Qh4 13.a4+/–) 13.Bc6 Ra7 14.Qf3 Qb8 15.Be5 (15.Nc3 Be7+/–) 15...Qc8 16.Bd5 Ne5 17.fe5 Nd5 18.Qd5 Rd7 (18...Qe6!? 19.e4 fe4 20.Qe4 c4+/–) 19.Qb3 (19.Qb3 Qc6 20.Rf5+/–) 1–0. Buss,Michael – Playfair,Schmuel, corr USCF, 1988.

6.b5 Nb6 7.Be2 c5 8.bc6 Nfd7?? 9.0-0 (9.cd7 Nd7 10.0-0 Rc8+- 11.Nd4 Qb6 12.Qc1 Be4 13.Nc3 Bc5+-) 9...a6?? (better is 9...bc6 10.Nd4 Na4+= 11.Bc1 Bc5 12.Nf5 ef5 13.d4 Bb4+=) 10.Be5 (better is 10.cd7 Qd7 11.Bd4+-) 10…Qc8 1–0. Buss,Michael – Playfair,Schmuel, USCF88CA378, 1988.

6.b5 Nb6 7.Be2 Bc5 8.0-0 =.

6.b5 Bd6 7.Be2 Qe7 8.0-0 Ne4 (8...0-0-0 9.Bd4 Bc5 10.Nc3=) 9.d3 (9.Bg7!? Rg8 10.Bd4+=) 9...Nef6= 10.h3 Bg6 11.g4 (11.Nbd2 e5 12.fe5 Ne5=) 11...0-0-0 12.Nbd2 Ne8 (12...Bc5 13.d4 Ba3 14.Ba3 Qa3 15.Nb3+=) 13.c4= h5 14.g5 e5 15.cd5 ef4 16.e4 Ne5 17.Qa4 Nd7 (17...Bc5 18.Kh1 Nf3 19.Nf3=) 18.Kh2 Kb8 19.Nc4 Nb6 20.Qb3 (20.Nb6 cb6 21.e5 Bc7+/–) 20...Nd5 21.Nd6 Rd6 22.Ba3 Ne3 23.Rg1 (23.Rfc1 Ng4 24.Kg1 Ne5=) 23...Ng4= 24.Kg2 Ne3 25.Kf2 Qd7 26.Bd6 Nd6 (worse is 26...cd6 27.h4+=) 27.Rh1 Qb5 28.Qb5 Nb5 29.Rhc1 Nd6 30.Nh4 Bh7 (better is 30...Nb5!?=) 31.Kf3+/– (31.Kf3 Re8 32.Kf4 Nd5 33.Kf3 Be4 34.de4 Ne4 35.Re1 Ng5 36.Kg3 Ne4 37.Kh2+=) 1–0. De Cat,Ben (2075) – Foulds,Andrew (1640), NATO–chT, 1999.

6.b5 Be7 7.Bd3 Bd3 8.cd3 =+.

6.b5 h6 7.Nd4 Bh7 (7...Be4 8.Nc3=) 8.Be2= Qc8 (8...Be7 9.0-0=) 9.0-0+= c5 (9...Be4 10.Nc3+=) 10.bc6 bc6 11.d3 (11.Nc3 c5 12.Nf3 Rb8=) 11...c5 (11...Rb8 12.Bc3=) 12.Nb3 Be7 (12...Rb8 13.Nc3=) 13.N1d2 0-0 14.Qe1 (14.Rb1 Rb8=) 14...Qc7 (14...c4 15.dc4 Bc2 16.Rc1 Bb3 17.Nb3+=) 15.Qg3 Rab8 16.c4 Qb7 (16...Bf5 17.e4 Bg6 18.cd5 ed5 19.Rab1=) 17.Bc3 a6 18.Rab1 Qa7 (18...Qc6 19.cd5 ed5 20.f5=) 19.Rb2 Rfc8 (19...Bf5 20.Rfb1+=) 20.Kh1 (20.Rfb1 Bf5+=) 20...Ne8 (20...Nb6 21.Be5 Ra8 22.Nf3+=) 21.Be5 (21.Rfb1!?+=) ½–½. Boehnke,Hartmut (2005) – Beishuizen,Anton P, corr ICCF EM/M/179 Email, 2002.

7.a4 Ne4 8.d3 Nd6 9.Be2 Be7 10.0-0 f6 11.Nbd2 Rc8 12.e4 de4 13.de4 Ne4 14.Ne4 Be4 15.Bc4 Nf8 16.Qe2 Bd5 17.Rad1 Qd6 18.Rfe1 Rc7? (18...Bc4 19.Qc4 Qb6+/–) 19.f5+/– Bc4 20.Qc4 Qb6 21.Bc3 Rd7 (21...ef5?? 22.a5 Qe6 23.Re6 (23.Qe6?! Ne6 24.Re6 Rd7+-) 23...Ne6 24.Qe6+-) 22.Qg4 (better is 22.Rd7!? Kd7 23.fe6 Ne6 24.Qd5 Qd6 25.Qb7 Qc7 26.Qe4+-) 22...Rd1= 23.Rd1 Kf7 24.Qh5 g6 25.fg6 Ng6 26.Ng5 Kg7 27.a5 Qb5 28.Ne6 Kg8 29.Qh6 Kf7 30.Ng5 (30.Re1 Qc4 31.Qg7 Ke8 32.Bf6 Bf6 33.Nf4 Ne7 34.Qf6 Qd4 35.Qd4 cd4 36.Nd5+-) 30...fg5? (better is 30...Kg8 31.Re1 c4+/–) 31.Bh8+- Nh8 (31...Nf8 32.Re1 Qd7+-) 32.Qh7 Ke6 (32...Kf6 33.Qh8 Kf7 34.Qh7 Kf6 35.Rf1 Qf1 36.Kf1+-) 33.Re1 1–0. Bach,Matthias (2270) – Flindt,Thomas (2165), North Sea Cup, 2008.

7.a4 h6 8.Be2 Bd6 9.d3 0-0 10.0-0 Qc7 11.h3 Bh7 12.Nbd2 Rfe8 13.c4 (13.a5 e5 14.fe5 Ne5=) 13…d4+= 0–1. De Oliveira,Carlos A – Frota,Alvaro M, CXEB TBI–C–XI–XII–P–0068, 1993.

7.Nc3 Be7 =.

7.c4 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 dc4 11.Bc4 Nb6 12.Na3 Bd3 13.Ne5 Bc4 (13...Nc4 14.Nac4 Qd5 15.Nd3 Qc4 16.Qb1=) 14.Nac4= Nc4 15.Nc4 Qd3 16.Qa4 Qb1 (16...Nd7 17.Kf2=) 17.Ke2+= Qh1?? (better is 17...Qe4 18.Kf2 Qd5+=) 18.Qa8+- Ke7 19.Qb7 Ke8 Black threatens to counter with Nd7 20.Qa8 Ke7 21.Ne5 Qh2 (21...Qg2 22.Qg2 Nd5+-) 22.Nc6 Kd6 23.Be5 Kd5 (23...Kd7 24.Qd8) 24.Na5# 1–0. Hecht – Lange, Berlin, 1954.

7.c4 dc4 8.Bc4 Nb6 9.Be2 Be7 10.0-0 0-0 11.a4 Nfd5 12.Ne5 Nb4 13.d3 c4 14.e4 cd3 15.Bf3 Bg6 16.Na3 Bc5 17.Kh1 Bd4 (17...a5!?-/+) 18.Qb3= a5 19.ba6 Na6 20.Bd4 Qd4 Attacks the isolani on a4 21.a5 Nc8 22.Nb5 (22.Qb7 Nd6 23.Qb6 Qb6 24.ab6 Be4 25.Be4 Ne4 26.Nd3 Rfd8+/–) 22...Qe3 23.Qd3 Qf4 24.Ng6 hg6 (24...fg6?? 25.Bg4 g5 26.Be6 Kh8 27.Rf4 gf4 28.Qd7+-) 25.Qc3 Na7 26.Na7 Ra7 27.Rfb1 Qb8 28.Rb5 Rc8 29.Qe3 e5 30.Rab1 Rc6 31.g3 f6 32.Bd1 Nc7 33.Rb6 Qa8 34.Rc6 bc6 35.Qb6?? Nb5 36.Bb3 Kh7+= 37.Rd1? Nd4-+ 38.Bc4 Ra5 39.Qb2 Ra7 40.Qg2 Qc8 41.Rb1 Qg4 42.Rf1 Ra3 43.h3 Qg3 44.Qg3 Rg3 45.Kh2 Rc3 46.Bf7 Re3 0–1. Biberger,Hans (1840) – Buckel,Ernst (1970), Regionalliga SW, 2007.

7.c4 Bd6 8.cd5 ed5 9.Be2 =+.

7.c4 Bd6=+ 8.Be2 Nb6 9.d3 (9.Na3 0-0=+) 9...Ng4 (9...dc4 10.dc4 0-0 11.0-0=+) 10.Qd2= 0-0 11.h3 Nf6 12.0-0 dc4 13.dc4 Ne4 14.Qd1 Ng3 15.Rf2 Bc7 16.Na3 Qd1 (16...Ne2 17.Qe2 Qd3 18.Qd3 Bd3 19.Be5 Be5 20.Ne5=) 17.Bd1 (17.Rd1 Rad8 18.Rd8 Rd8-/+) 17...Rad8 18.Bb3 (18.Rd2 Ne4 19.Rd8 Rd8=+) 18...Rd3 19.Re1 Ne4 20.Rfe2 Ng3 (better is 20...Rfd8!?-/+) 21.Rf2= ½–½. Schirmer,Michael – Merten,Rainer, corr SOK–92–89 KGP–2–Z–02, 1992.

7.c4 Bd6=+ 8.Be2 dc4 9.Na3 =+.

7.c4 Bg4 8.Be2 dc4 9.Bc4 Be7 10.Nc3 0-0 11.0-0 Qc7 (11...Nb6 12.Be2=+) 12.h3 (12.Qc2 Nb6 13.Be2 Qd6=) 12...Bh5 (12...Bf5 13.Nh4 Nb6 14.Qe2=) 13.g4 Nb6 14.Bb3 (14.Be2 Bg6=) 14...c4 (14...Bg6 15.Ne5=+) 15.Bc2 (15.gh5 cb3 16.Qb3 Rfc8=) 15...Bg6=+ 16.a4 (16.Bg6 fg6 17.d3 Rad8=+) 16...Bc2 17.Qc2 Rfd8 18.Ne5 (18.g5 Ne8=+) 18...Rac8 19.Rac1 Nfd7 (19...Bb4 20.g5 Nfd7 21.d4=+) 20.Ne4 (20.a5 A) < 20...Ne5 21.ab6 (< 21.fe5 Nd5-/+) 21...ab6 22.fe5+/–; B) 20...Na8 21.a6 Ne5 22.ab7 Qb7 23.fe5 Nc7-/+) 20...Ne5=+ 21.Be5 Qd7 22.f5 Nd5 23.f6 gf6 24.Bf6 Bf6 25.Rf6 c3 26.dc3 Ne3 27.Qf2 Qd3 28.Ng5 Nd1-/+ 29.Qh4 Qe3-+ 30.Kf1 h5?? (31.Qh5 Qd3 32.Kg1 Qg3 33.Kf1 Qd3 34.Kg1 Qg3 35.Kf1 Qd3=; 30...h6 31.Qh6 Qd3 32.Kg1 Nc3 33.Nf7 Qd4 34.Kg2 Qd2 35.Rf2 Qh6 36.Nh6 Kg7+/–) +-. Fournier,Frederic – Kuchelbecker,Charles, AJEC Defi corr, 1995.

7.Be2 c4 8.a4 Bc5 9.Bd4 0-0+= 10.0-0 Ne4 (better is 10...a6+=) 11.Ng5 (better is 11.d3 cd3 12.cd3=) 11...Bd4-+ 12.ed4 Qb6 (12...Ng5 13.fg5 Qg5 14.a5-+) 13.c3 Rac8 (13...Ng5 14.fg5 Qd8 15.d3-/+) 14.Na3 (14.Ne4 Be4 (worse is 14...de4 15.Na3+/–) 15.d3 cd3 16.Bd3 Nf6+=) 14...h6 (14...Ng5!? 15.fg5 Qd8-/+) 15.a5+= Qd6 16.Ne4 Be4 17.Nc2 f5 (17...a6 18.b6+=) 18.a6= b6 19.g4 (better is 19.Nb4!?=) 19...Rce8 20.Nb4 fg4 (20...fg4 21.Bg4 Rf4-/+) 0–1. Velker – Pagni,CA, corr th, 1990.

7.Be2 c4 8.a4 Bc5 9.Nd4 Bg6 10.0-0 0-0 11.d3 cd3 12.cd3 Rc8 13.Nd2 e5 14.f5 (14.fe5 Ne5 15.N2b3 Bd6=) 14...ed4+= 15.ed4 Bd6 16.fg6 hg6 17.Nf3 Ng4 18.Qd2 Qe7 19.Ne5 Nge5 (worse is 19...Be5 20.de5 (20.Bg4?! Bd6=) 20...Nde5 21.h3+/–) 20.de5 Ne5 21.d4 Nc4 22.Bc4 Rc4 23.Qd3 (23.Qf2 Qe4 24.Rfc1 Rc1 25.Rc1 Re8-/+) 23...Rfc8 (23...Re8 24.Rf2-/+) 24.Ba3 (24.Qf3 Qd7-/+) 24...Ba3 25.Ra3 Qe4 (25...Qh4 26.Rd1-+) 26.Rd1 (26.Qe4!? de4 27.Rd1-/+) 26...Qd3 27.Rdd3 Rc1 28.Kf2 R8c2 29.Kg3 Rg1 30.Kf4 f6 31.g3 Rf1 (31...Rh2 32.Rac3-+) 32.Rf3 Rf3 (32...g5!? 33.Kg4 Rd1 34.Rfd3-+) 33.Kf3-/+ Kf7 34.h4 Rc4 35.Ke3 Ke6 36.g4 f5 37.gf5 gf5 38.a5 Rb4 (38...Rc2 39.Kf3 Rd2 40.Rc3-/+) 39.b6 (better is 39.a6!? b6 40.Rc3-/+) 39...ab6-+ 40.ab6 Rb6 41.Ra8 Rb3 42.Kf4 Rd3 43.Ra4 (43.Re8 Kd7 44.Rb8-+) 43...Rh3 44.Kg5 Rg3 45.Kf4 Rg4 46.Kf3 Rh4 47.Rb4 f4 (47...b5 48.Ke3-+) 48.Rb7 g5 49.Rg7 Rh3 50.Ke2 Kf5 (50...Kf5 51.Kd2 Re3-+) 0–1. Sorger,M – Jentzsch,Joachim, corr DDR–Cup3 sf, 1973.

7.Be2 Qc7 8.0-0 (8.Nh4 Be7=) 8...Bd6 (8...h6 9.Bd3 Bd3 10.cd3+=) 9.d3 (9.Nh4!?=) 9...0-0 10.h3 (10.Nh4 h6+=) 10...h6 11.g4 (11.Na3 Rfe8-/+) 11...Bg6-/+ 12.Nh4 (12.Na3 d4! 13.ed4 Bf4-/+) 12...Bh7 (12...d4 13.ed4 Bf4 14.Ng6 fg6 15.c4-+) 13.g5 (13.Nd2 d4 14.Nc4 Nd5-/+) 13...hg5-+ 14.fg5 Bh2 (14...Be5 15.c3 Bg3 16.Ng2-+) 15.Kh1 Ne8 16.Nd2 (16.Bh5 Nd6-/+) 16...Bg3 17.Nhf3 (better is 17.Ndf3-/+) 17...f5 (better is 17...Nd6!? 18.Nb3 Nb5-+) 18.Rg1 Bd6?? (better is 18...g6 19.Nf1 Bd6+=) 19.g6+- (19.g6 Bg6 20.Rg6+-) 1–0. Deus Filho,Joaquim (1975) – Ishida,Leopoldo Tetsuo, Maringa BRA, 4th Open, 2014.

7.Be2 Be7 =.

8.Be2 0-0 9.0-0 b6 (9...Qa5 10.Bc3 Qc7 11.Nh4=) 10.c4 (10.Nh4!?=) 10...dc4=+ 11.Bc4 Be4 (11...Ne4 12.d3 Bf6 13.de4 Bb2 14.Ra2 Be4 15.Rb2+-) 12.d3 Bb7 13.e4 (13.Nc3 Nd5 14.Qe2 Bf6=) 13...h6 (13...a6 14.ba6 Ba6 15.Nc3=) 14.Nbd2 Qc7 15.Ne5 Rad8 16.Qb3 (16.a5 ba5 17.Qa4 Ne5 18.Be5 Qd7+=) 16...Ne5 17.fe5 Nd7 18.Nf3 Rfe8 19.Bc3 Nf8 20.a5 Bg5 (20...Qd7!?+/–) 21.Ng5+- hg5 22.Qb2 Ng6 23.ab6 (23.Qf2 Nf4 24.Qf3 Qd7+/–) 23...ab6 24.g3 (24.Ra7!?+/–) 24…Ra8+= ½–½. Perez Marin – Perez Perez, corr Cuba, 1995.

8.Be2 Ne4 9.0-0 (9.Bg7? Rg8 10.d3 Rg7 11.de4 de4-+ (11...Be4?! 12.0-0-/+)) 9...Bf6 10.Qc1 (10.Ne5 Qe7=) 10...Rc8 11.c4 (11.d3 Nd6=) 11...b6 (11...dc4 12.Bc4 Nb6 13.Be2=) 12.d3= Nd6 13.Ne5 h5 (13...dc4 14.dc4 Be5 15.fe5=) 14.Nc6+= White is in command 14...Qc7 (14...Bb2 15.Qb2 Qf6 16.Qf6 Nf6 17.a5+=) 15.cd5+/– ed5 16.Nc3 Bc3 17.Qc3 f6 18.Bf3 Be6 19.Rac1 Nf5 (19...Nb8 20.Nd4 Qe7 21.Ne6 Qe6 22.e4+/–) 20.e4 d4 (20...de4!? 21.de4 Ne7+/–) 21.Qe1+- Ne7 22.Nd4! Bf7 (22...cd4 Exploits the pin 23.Rc7) 23.e5 fe5 24.fe5 Ne5 (24...Qe5 25.Nc6 Qd6 26.Na7+-) 25.Bc6 (25.Nf5 Nf3 26.Rf3 Kd8 27.Bg7 Re8+-) 25...N5c6 26.Nc6 Bd5 27.Be5 Qd7 28.Bg7 Rg8 29.Ne5 Qd6 (29...Qb7 30.Qf2 Kd8 31.Qf6+-) 30.Qf2 (30.Rf6 Qb8 31.Qg3+-) 30...Ng6? (30...Kd8 31.d4 Rg7 32.Qf8 Kc7 33.Qg7 Rg8 34.dc5 bc5 (34...Rg7? 35.cd6 Kd6 36.Nc4 Kd7 37.Ne3+-) 35.Qg8 Bg8-+) 31.Nf7 Qd7 (31...Qe7 32.Rce1 Be6+-) 32.Rce1 Ne7 33.Ne5 Qf5 34.Qh4 Qh7 (34...Qf1 35.Kf1 Rg7+-) 35.Qe7!! Ke7 36.Nc6 Kd6 37.Rf6 (37.Rf6 Be6 38.Ree6 Kc7 39.Rf7) 1–0. Schiffler,L – Goers, Soemmerda, 1950.

8.c4 dc4 9.Na3 =+.

8.c4 h6 9.0-0= 0-0 10.Ne5 Qc7 11.Nd7 Nd7 12.g4 Bh7 13.cd5 ed5 14.Nc3 Nf6 15.Bf3 d4 16.Nd5 (16.Ne2 Rfe8=+) 16...Nd5-/+ 17.Bd5 Bd3 18.Rf2 (18.Re1 Bb5 19.Qf3 Rab8-/+) 18...Bb5 (18...Qd7 19.a4 Bf4 20.Bf7 Rf7 21.Rf4 Rf4 22.ef4-+) 19.ed4=+ cd4 (19...Rae8 20.Qf3=+) 20.Bd4 Bf4 21.Qf3 Be5 (21...Rad8 22.Qf4 Qf4 23.Rf4 Rd5 24.Rb1-/+) 22.Be5= Qe5 23.Rb1 Ba6 24.Bf7 Kh8 25.Qe3 Qc7 26.Bb3 Rf2 27.Qf2 Qd7 28.Qf4 (28.g5 Bd3 29.Re1 hg5=) 28...Rd8 29.Rb2 b6 (29...Bd3 30.g5=+) 30.Rc2 Qe7 31.d4 (31.Qe3 Qf6 32.Rc1 Qd6=+) 31...Rf8 (31...Qe1!? 32.Kg2 Bd3-/+) 32.Qe5= Qh4 33.Be6 Bd3 (33...Bc4 34.Bf5 b5 35.d5=) 34.Rd2 ½–½. Kucharkowski,Jens – Kreuzer,Uwe, corr SOK–91–76, 1991.

8.Nh4 Be4 =+.

9.Na3 c4 10.Nd4 Qa5 11.Nb1 Bg6 12.a4 Qc7 (12...Rae8 13.Bc3 Qc7 14.a5+=) 13.Ba3 (13.a5 Rfe8=) 13...Rfe8 14.Bd6 Qd6 15.Nc3 Rac8 16.Bf3 e5 (16...a5 17.Qe1=) 17.fe5 Ne5 18.Nce2 (18.a5 Be4=) 18...Nf3 19.gf3 (19.Nf3 c3 20.Nc3 Ng4+=) 19...Nh5 20.Rf2 f5 21.f4 Nf6 22.Rg2 Qd7 23.Qe1 Re7 24.Nf3 Qe8 25.Ne5 Nd7 (25...Bf7 26.Nd4 Be6 27.Qh4+=) 26.Nd7 (better is 26.Ng6!? hg6 27.Qg3+/–) 26...Qd7= 27.c3 Qd6 28.Nd4 Rf8 29.Qb1 Rf6 30.Kf2 (30.a5 Kh8=) 30...Re4 31.Qc2 Bh5 32.Rag1 g6 33.Rg3 Bg4 34.h3 Bh5 35.Ra1 Rf7 36.a5 h6 37.a6 b6 38.Qc1 (38.Rag1 Kh7=) 38...Kh7= 39.Qg1 g5 40.Qg2 Rd4 41.ed4 gf4 (41...Re7 42.Kf1 gf4 43.Rf3-+) 42.Rg8+= f3 43.Qg3 Qe7 44.Re1 f4 Threatening mate... how? 45.Qg1 Qh4 46.Kf1 The mate threat is Rh8 46...Qh3 47.Kf2 Qh4 48.Kf1 Re7 49.Re5 f2 (better is 49...Qh3!? 50.Kf2 Qh4 51.Kf1 Qh3 52.Kf2 Qh4 53.Kf1=) 50.Qg2+/– f3 (50...Rd7 51.Rd5 Be2 52.Ke2 f3 53.Qf3 Re7 54.Re5 Kg8 55.Re7 Qe7 56.Kf2 Qh4 57.Qg3 Qg3 58.Kg3+-) 51.Qg3 Qf6 (51...Qg3 52.Rg3 Re5 53.de5+-) 52.Kf2+- (52.Kf2 Re5 53.de5+-) 1–0. Karker,Norbert – Jegorov,NF, corr URS–FRG, 1957.

9.a4 Qc7 10.Na3 (10.Nh4 d4=) 10…h6. Shaplinov – Nowitzki, corr, 1967.

9.c4!? Qc7 10.Nc3 (10.a4!?).

9.d3!?

9.Nh4 Re8 =.

5.Nf3= e5 6.fe5 fe5 7.Ne5 Qh4 8.g3 Qb4 9.Bc3 =.

5.Nf3 e6 6.c4 (6.Nd4 Nh6=) 6...c6 (6...dc4 7.Bc4 Nb6 8.Bb3+=) 7.a3= Bd6 (7...dc4 8.Bc4 Nb6 9.Bb3=) 8.Be2 (better is 8.Nd4 Nh6 9.Be2=) 8...Qc7 (8...dc4 9.Nd4 Nb6 10.Nf5 ef5 11.Bd4=) 9.0-0 (9.Nd4 c5 10.Nf5 ef5 11.bc5 Nc5 12.cd5 Ne7+/–) 9...0-0-0? (better is 9...dc4!? 10.Nd4 Nb6=) 10.cd5 cd5 (10...ed5 11.Nd4 Ne7 12.g4+- (12.Nf5?! Nf5 13.Qc2 Ne7+=)) 11.Nc3+- Kb8? (11...Nb6 12.Nb5 Qd7 13.Na7 Kb8 14.Nb5+-) 12.Rc1 (12.Nb5 Qb6 13.Bd4 Bc5 14.bc5 Nc5+-) 12...Qb6?? (better is 12...Nf8+-) 13.Na4 (13.Na4 Qc7 14.Rc7 Bc7 15.Nd4+-) 1–0. Wall,Bill – Hayes,Dan, Dayton, OH, 1980.

5.Nf3= Bg4 6.b5 (6.h3 Bf3 7.Qf3 e6=) 6...e5 7.fe5 fe5 Opening the f–file gets Black a lot of play 8.Be2 Bd6 9.0-0 Ngf6 10.a4 0-0 11.Na3 Qe7 12.c4 c6 13.Ne1 Be6 14.Nf3 h6 15.Nh4 Ne4 16.Rf8 Qf8 (worse is 16...Rf8 17.Ng6 Qf6 18.Nf8 Qf2 19.Kh1 Qf8 20.Qc2+/–; 16...Nf8?! 17.Nf3+=) 17.Qe1 (17.Nf3 Rd8+=) 17...Qf7 (17...Ndc5 18.d3 Ng5 19.a5+=) 18.d3 Nef6 19.Qd2 (19.Qg3 Ba3 20.Ra3 dc4 21.dc4 Ne4-/+ (21...Bc4?? 22.Nf5 Ng4 23.Bg4+-)) 19...g5 (19...Nc5 20.Qc2+=) 20.Nf3 (20.bc6 bc6 (worse is 20...gh4 21.Nb5 Bc5 22.cd7+/–) 21.cd5 Nd5-/+ (21...cd5?! 22.Nb5 Bb8 23.Nf3=)) 20...Qg6 (20...g4 21.Nh4+=) 21.Rf1 (21.bc6 bc6 22.cd5 Bd5+= (worse is 22...Nd5 23.Nc4 Bb4 24.Qc1+/–)) 21...Rf8 22.Nb1 Bg4 23.Ba3 Ba3 24.Na3 Bf3 25.Bf3 e4 26.Be2 Nc5 27.d4+/– Ne6 28.Nc2 Nd7 29.a5 Rf1+= 30.Bf1 Ng7 31.Nb4 Qe6 32.Qc2 White plans c5 32...Qd6 33.Qc3 Nf6+/– 34.Be2 Nf5 35.c5 Qc7 36.b6 ab6 37.ab6 Qf7 38.Qa3 Kg7 39.Nc2 h5 40.Qa7 Ng4 41.Bg4 hg4 42.Qb8 Kg6 43.Qa8 g3+= 44.hg3 Ng3 45.Qa1?? Ne2 (45...Ne2 46.Kh2 Qh7#) 0–1. Kucharkowski,Jens – Thieme, Freital, 1982.

5.a4 e6 6.b5 c6 7.c4 (7.Nf3 Bb4+=) 7...Be7 8.Nf3 0-0 (8...dc4 9.Bc4 cb5 10.ab5+=) 9.Be2 (9.bc6 bc6 10.Nd4 Ne4+=) 9...Nc5 (9...dc4 10.Bc4 Rc8 11.bc6 Rc6 12.d3+=) 10.Ne5 Nfe4 (10...cb5 11.cb5 Qa5 12.0-0+=) 11.0-0 (11.d3 Bh4 12.g3 Qa5 13.Kf1 Bg3 14.de4 Be4+-) 11...f6+= 12.Nf3 Nd6 (12...dc4 13.bc6 bc6 14.Nd4-/+) 13.d3 (13.d4 Nce4 14.c5 Nf7=) 13...a6 (13...cb5 14.cb5 Rc8 15.Nd4=) 14.Na3 (14.Ba3 Nd7=) 14...ab5 15.ab5 Na4 16.Qc1 (16.Qb3 Nb2 17.Qb2 Qb6+=) 16...Qb6 17.Bd4 c5 18.Bc3 dc4 19.dc4 Nc3 20.Qc3 Ne4 21.Qb2 Bg4 22.Nh4 f5-+ 23.Nf3 Bf6 24.Ne5-/+ Be2 25.Qe2 Rad8 26.Nb1 Qc7 27.Qb2 Rd3 28.Ra3 Rfd8 29.b6 Qb8 30.Rd3 Rd3 31.Qe2 Rd8 32.Nd3 Qd6 33.Rd1 Qb6 34.Qc2 Qd6 35.Nf2+= Qc7 Black terminates the opponent with strong threats 36.Ne4 Rd1 37.Qd1 fe4 38.Qc2 Qa5 Threatening mate... how? 39.Kf1 Qc7 40.Qe4 Qd6 41.Qc2 e5 42.g3 ef4 43.gf4 Qe6 44.Qe2?? Qe4-+ Do you see the mate threat? 45.Nd2?? Qh1 46.Kf2 Bh4# 0–1. Kucharkowski,Jens – Querner, Freital, 1986.

5.Be2 e6 6.a3 c6 (6...a5=+) 7.d3? (7.Nf3!?=) 7...Bd6 (7...a5 8.Nf3-/+) 8.Nf3 Qb6 (8...a5 9.b5=+) 9.d4 (9.Bd4!? Qc7 10.Nbd2=) 9...a5 10.c3 (10.c4 ab4 11.c5 Nc5 12.dc5 Bc5-/+) 10...ab4 (10...0-0!? 11.0-0-/+) 11.cb4 Ne4 12.0-0 Ndf6 13.Ne5 h5 14.Nc3 Ke7 (14...h4 15.Ne4 Ne4 16.Bg4-/+) 15.Ne4= Be4 16.Bc3 Rh7 (16...h4 17.h3=+) 17.Be1 (17.a4 Bb4 18.Qb3 Ba5 19.Qb6 Bb6+=) 17...h4=+ 18.h3 Nd7 (18...Rg8 19.Bd3=+) 19.Bd3 Nf6 20.Be2 Nd7 21.Nd7 (21.Bd3!? Bd3 22.Qd3=) 21...Kd7=+ 22.Bd3 f5 23.Be4 fe4 (better 23...de4 24.a4 Ke7= (24...Bb4?? 25.Rb1+-)) 24.Qg4+= Qd8 25.f5 Qf6 26.fe6 Qe6 27.Rf7 Be7 28.Bh4 Qg4? (better 28...Rh4 29.Re7 Ke7 30.Qh4 Kf7+=) 29.Re7+- (29.hg4? Rh4 30.Rg7 Rhh8-+) 29...Kd6 30.hg4 Rh4 31.Rg7 Rah8 32.Kf2 b5? (32...R4h7 33.Rh7 Rh7 34.Kg3+-) 33.Rc1 (better 33.Rg6 Kd7 34.a4 ba4 35.Ra4 Kc7+-) 33...Ra8?? (33...R4h6+-) 34.Rg6 Kd7 (34...Ke7 35.Kg3 Rhh8 36.Rgc6+-) 35.Kg3 Rh7 36.Rgc6 (36.Rgc6 Rh1 37.Rc7 Kd8 38.Rh1 Kc7 39.g5+-) 1–0. Deus Filho,Joaquim De (2010) – De Souza,Mauricio Ribeiro (1700), 1st IRT Classico Xadrez Batatais?, 2014.

5.Nf3 e6 6.b5 =.

5.Nf3 h6 6.c4 (6.Be2 e6 7.a3 a5=) 6...e6+= 7.a3 dc4 8.Bc4 Nb6 9.Be2 Be7 10.Nc3 0-0 11.0-0 c5 12.bc5 Bc5 13.Ne5 Ne4 (13...Rc8 14.Rc1=) 14.Ne4 Be4 15.Rc1 (15.d4 Be7=) 15...Rc8 (15...Qd5 16.Nc4=) 16.d4 Be7 (16...Bd6 17.Bf3 Bf3 18.Qf3=) 17.Qb3 (17.Rc8!? Nc8 18.Bf3=) 17...Qd5+= 18.Qd5 Nd5 19.Kf2 Rfd8 (19...Bg2!? 20.Kg2 Ne3 21.Kf2 Nf1 22.Rf1 Rc2+=) 20.Bd3 (20.Bf3 Bf3 21.Kf3 Nb6=) 20...Nf6 21.Be4 Ne4 22.Ke2 f6 23.Nc4 b5 24.Nd2 Nd6 25.Kd3 Nb7 26.Rc8+= Rc8 27.Rc1 Rc1= 28.Bc1 Kf8 29.Nb3 a5 30.e4 Ke8 31.g4 White plans f5 31...Kd7 32.f5 e5 33.d5 a4 34.Nd2 Na5 35.Kc3 Kc7 36.Bb2 Kb6 37.Kd3 Bc5 38.Kc2 Be3 39.Bc3 Nb7 40.Bb4+= Bc5 41.Kc3 Bd4 42.Kd3 Nc5 43.Ke2 Nd7 44.Nf3 Bc5= 45.Kd3 Nb8 46.Kc3 Na6= 47.h4 Nb4 48.ab4 Be7 49.Ne1 Bd6 50.Nd3 Be7 51.Kb2 Bd6 52.Ka3 Be7 53.Ne1 Bd8 54.Nf3 Bc7 55.h5 Bd6= 56.Nh4 Kb7 57.Ng6 Kc8 58.Nh8 Kd7 59.Nf7 Bf8 ½–½. Lippmann,Ulrich (2075) – Benedik,Kurt, EU–ch Seniors, 2005.

5.f3 Bg6 6.h4 h5 7.g5 e5 8.Nc3 c6 9.a3 Bd6 10.Nge2 Ne7 11.f4 Qc7 12.Bh3 Nf5 (12...ef4 13.Nf4 Bf4 14.ef4 Qf4 15.Bd7 Kd7 16.Ne2-+) 13.Bf5 (13.e4 de4 14.Ne4 Bf8=) 13...Bf5-/+ 14.fe5 Be5 15.0-0 Bg4 16.Na4 (16.Qe1!?-/+) 16...Bg3-+ 17.Bg7 Rg8 18.Bf6 Nf6 19.Rf6 Bh4 (19...Bh4 20.Rf1 Qd8-+) 0-1. avas (1610) - armodio (1870), Rated Classical game, lichess.org, 2013.

5.f3 Bg6 6.h4 h5 7.g5 e5 8.Nc3 c6 9.b5 Bd6 10.Nge2 Qc7 (10...Ne7 11.f4=+) 11.Bh3 (11.bc6 Qc6 12.Bg2 Ne7=) 11...Ne7 12.Rb1 (12.f4 Bf5=+) 12...c5 (12...0-0 13.f4=+) 13.0-0 f6 14.gf6 (14.f4 0-0=+) 14...Nf6 15.f4 ef4 (15...d4 16.fe5 Be5 17.Na4=+) 16.Nf4 Bf4 17.Rf4 (< 17.ef4 0-0=+) 17...d4 18.Ne2 (18.Rd4 cd4) 18...Ned5 19.Rf3 Be4 20.Rg3 (20.Rf1!?=+) 20...d3-/+ 21.cd3 Bd3 22.Rg5 Bb1 23.Qb1 Rh6 24.Bf6 (24.Bg2 Qd7=+) 24...Nf6-/+ 25.Nf4 Qd6 (25...c4 26.Ne6 Qd6 27.Ng7 Kd8 28.Ne6 Kc8 29.Qf1+/–) 26.Qb2 (26.Rg7 a6=+) 26...Rd8 (26...b6 27.Rg7 a6 28.ba6+-) 27.Rg7 (better is 27.Qe5 Qe5 28.Re5 Kf7 29.Rc5 Rd2 30.Rc7 Ke8 31.Rb7 Ra2 32.Rg7=) 27...Kf8 (27...Rh7 28.Rg6 Ke7=) 28.Ne6 Qe6 29.Be6 Kg7 30.Qe5 Rg6 31.Kf1 Rd2 32.Bf5 (32...Rd1 33.Ke2+-; 32.Qc5?! Rd1 33.Ke2 Rd2 34.Kf1 Rd1 35.Ke2 Rd2 36.Kf1=) 1–0. Kucharkowski,Jens – St_Jean,Benoit, Orang–Utan Invitational, 2001.

5.Nf3 e5 6.Ne5 Ngf6 (6...Ne5!? 7.Be5 Qe7=) 7.Ng6+= hg6 8.a3 g5 9.Qf3 c6 10.Qf5 Ne4 11.c4 Nd6 12.Qc2 dc4 13.Bc4 Nc4 14.Qc4 Qe7 15.Qd4 (15.d3 Rh4+=) 15...0-0-0 (15...Qe6!?=) 16.Qa7+/– Qe4 17.Rg1?? (17.Rf1 Rh2 18.Qa8 Nb8+=) 17...Rh2?? (better is 17...Qc2 18.Nc3 Qb2-+) 18.Qa8+= Nb8 19.Nc3 Qc2 20.Bc1 Be7 21.Ne2?? Bf6-+ 22.d4 Bd4! 23.ed4 Rd4 24.Be3 Rd3 25.Rc1 Qb2 26.Qa7 Ra3 27.Qd4 Qd4 28.Nd4 Na6 29.Nf3 Rh3 30.Ng5+- (30...Rh2 31.b5+-) 1–0. marekt – marjan_79, GameColony.com, 2002.

5.Nf3 e6 6.Ne5 =+.

5.Nf3 h5 6.g5 =.

5.Nf3 h6 6.d3 (6.Bb5 c6 7.Be2 Ngf6=) 6...e6 7.a3 Ngf6 8.Bh3 (8.Rg1 Bd6=+) 8...Bd6 (8...c5 9.Qd2=+) 9.c4 c5 10.cd5 ed5 11.0-0 (11.Nh4 Bh7=+) 11...cb4 12.ab4 Qe7 (12...Bb4 13.Qb3 Qe7 14.Ra4=+) 13.Nh4 (13.b5=+) 13...0-0 (13...Bh7!?=+) 14.g5= Nh7 (14...hg5 15.Ng6 fg6 16.b5=) 15.Ng6+= Qg5? (better is 15...fg6 16.Qg4 Be5+=) 16.Kh1+- fg6 17.Bd7 Qh4 18.f4 Nf6 19.Be6 Kh7 20.Qf3 Rae8 21.Bh3 Bb4 22.Bd4 a6 23.Ra4 a5 24.Nc3 Bc3 25.Bc3 Rc8? 26.Bc8 Rc8 27.Bf6 Qf6 28.Ra5 Rc2 29.Rd5 Qb2 30.f5 Rh2 31.Kg1 g5 32.f6 gf6 33.Qf5 Kg7 34.Rd7 Kf8 35.Qc5 (35...Ke8 36.Qe7#) 1–0. orane – look88, Live Game Caissa's Web, 2005.

5.Bg2 c6 6.Nf3 Ngf6 7.Ne5 (7.g5 Nh5+=) 7...Ne5 8.Be5 e6 9.a3 Bd6 10.Bd6 Qd6 11.Nc3 e5 12.g5 Bh5 13.Bf3 Bf3 14.Qf3 e4 (14...Nd7!?+=) 15.Qg3= Qg3 16.hg3 Nd7 17.Ke2 0-0-0 18.d3 ed3 19.cd3 Rde8 20.d4 Nb6 21.a4 White intends b5 21...Nc4 22.Rab1 White intends b5 22...Re6 23.b5 Rg6 24.bc6 bc6 25.Rb4 (25.Rh5 h6 26.Kd3 Nd6+=) 25...a5 (worse is 25...Rg5 26.Rhb1 Kd7 27.Rb7 Ke6 28.Ra7+-) 26.Rb3 Rg5 27.Rhb1 Kd7 (better is 27...Rd8!?+=) 28.Rb7+/– Ke6 29.Rc7 Rd8 (29...Kd6 30.Rf7 Re8 31.Rbb7+-) 30.Rbb7 f6? (better is 30...Nd6 31.Rc6 Rc8 32.Rc8 Nc8+-) 31.Rc6 (31.Rg7?! Rg7 32.Rg7 Rb8=) 31...Rd6 (31...Kf5 32.e4! Kg4 33.Nd5+-) 32.Rcc7 Rd8 (32...h6 33.e4 (33.Rg7?! Rg7 34.Rg7 Rc6+-) 33...de4 34.Rc4+-) 33.e4 (33.Rg7?! Rg7 34.Rg7 Rb8 35.Rh7 Rb2 36.Kf3 Nd2 37.Kg4 Ne4 38.Ne4 de4+-) 33...Na3 (33...de4 34.Rc4 Rd7 35.Rb6 Kf5 36.Rb5 Kg6 37.Ne4 Rb5 38.ab5+-) 34.f4 (better is 34.Re7 Kd6 35.ed5 Re5 36.de5 Kc5 37.Rbc7 Kb4 38.Kd3+-) 34...Rh5 (34...de4 35.fg5 Rd4+-) 35.Rc6 (35.Re7 Kd6 36.ed5 Rh2 37.Kf3 Rf2 38.Kf2 Nc4 39.Re6) 35...Rd6+- 36.f5 (36.f5 Rf5 37.ef5 Kf5 38.Rd6+-) 1–0. Zalys – Courval, Montreal, 1983.

5.Nf3 e6 6.a3!? =.

5.Nf3 e6 6.a4 Bb4 7.Nd4 (7.Be2-/+) 7...0-0 (better is 7...Be4!?-+) 8.Nf5=+ ef5 9.Na3 (9.Qf3!?=+) 9...Ne4 10.Nb5?? (better is 10.c3 Ba5 11.Be2-/+) 10...Bd2-+ 11.Ke2 Re8 12.Nd4 Qf6 13.Rb1 Ne5 14.Nb3 Qa6 15.c4 Qc4# 0–1. TD_6 – babylyub, ICS rated blitz match, 1998.

5.Nf3 e6 6.b5 Bd6 7.a4 0-0 8.Nd4 Be4 9.d3 Bg6 10.Be2 Rc8 11.h4 Qe7 12.h5 Bb4 13.Bc3 Bf5 14.Nf5 Bc3 15.Nc3 ef5 16.h6 c6 17.hg7 Kg7 18.bc6 Rc6 19.Nb5 Ra8 (19...f4 20.Nd4 Qb4 21.Kf1 fe3 22.fe3 Rc7+/–) 20.d4?? (better is 20.Nd4!? Qb4 21.Qd2+-) 20...Kg8 21.Bd3 f4 22.Qf3 fe3 23.Qe3?? (better is 23.fe3 Kh8 24.Qf4=) 23...Re6-+ 24.Nc7 (24.Rh3-+) 24...Re3 25.fe3 (25.Kd1 Rd3 26.cd3 Rc8-+) 25...Qe3 26.Kd1 Qd4 (better is 26...Ne4 27.Be4 Qd4 28.Ke2 Qe4 29.Kd2-+) 27.Na8 (27.Ra3 Rc8 28.Nb5 Qg4 29.Kc1-+) 27...Qa1 28.Kd2 Qh1 29.Nc7 Qg2 (30.Kc3 d4 31.Kd4 Qf2 32.Kc3 Qc5 33.Kd2 Qc7-+) 0–1. TD_6 – babylyub, ICS rated blitz match, 1998.

4.a3 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Bf5).

4.Be5 Qe7 5.Nf3 Qb4 (5...Be4 6.Bc3+-) 6.Bc7 (6.Nd4 Nc6 7.Bb5 Bd7 8.Bc6 bc6+=) 6...Nc6 (better 6...Qb2 7.Be5 Qc2+-) 7.c3?? (better 7.Nc3 Nf6 8.Rb1+-) 7...Qc4?? (7...Qb2 8.Na3 Ba3-+ (8...Qa3?! 9.Qb3 Qb3 10.ab3-+)) 8.Bc4+- Bb1 (8...dc4 9.Qa4 Rc8+-) 9.Qb1 dc4 10.Qe4 (better 10.Qb7 Nge7 11.Qa8 Kd7+-) 10...Be7 (10...Nge7 11.Rb1 b6 12.Qc4+-) 11.Rb1 b6 (11...h5+-) 12.Qc6 Kf8 13.Qa8 Bd8 14.Qd8 1–0. GuestPRVN – GuestTQNC, freechess.org, 2017.

4.Be5+= f6 5.Bd4 (5.Bc3!?+=) 5...Bb4= 6.c3 Ba5 (6...Be7 7.Qb3 b6 8.Nf3=) 7.Bb5 c6 8.Ba4 b5 9.Bb3 b4 (9...Nd7 10.d3=) 10.cb4 Bb4 11.Ne2 g5 (11...Ne7!?=) 12.0-0 h5 13.g3 (13.f4 c5 14.fg5 cd4 15.Rf5 de3 16.de3 Bc5+-) 13...a5 (13...h4 14.Bc2 Qd7 15.a3=) 14.Nec3 (14.Bc2 Bc2 15.Qc2 Qe7+=) 14...h4 15.gh4 (better is 15.g4!? Bd3 16.Re1=) 15...Qd6 16.Ba4 (16.a3 Rh4 17.f4 Bc3 18.Nc3 gf4 19.ef4 Rg4 20.Kh1 Rf4 21.Qh5 Kd8 22.Qf7=) 16...Rh4-/+ (16...Qh2; 16...gh4?! 17.a3 Bc3 18.Nc3=) 17.Re1?? (better is 17.f4-/+) 17...Qh2 18.Kf1 Bd3 (19.Qe2 Qh1). KaiKerling – Goof, ChessWorld.net, 2005.

4.Be5 Qg5 5.Bc7+- Nc6 6.a3 Rc8 7.Bf4 Qg6 8.Bb5?? (8.Ra2!?+-) 8...Be7 (better is 8...Qg2 9.Qf3 Be4 10.Qg2 Bg2-+) 9.Nc3+/– Bc2 10.Qe2 (10.Qf3 Nf6 11.Rc1+= (11.Nd5? Nd5 12.Ne2 Be4-+)) 10...Qg2= 11.Qf3 Qg6 (11...Be4!? 12.Ne4 Qf3 13.Nf3 de4=) 12.Nd5+= Be4 13.Qh3 (13.Ne7?? Nge7 14.Bd3 Bf3 15.Bg6 Bh1-+ (worse is 15...Ng6 16.Nf3 Nf4 17.ef4+=)) 13...Bd5? (better is 13...f5 14.Ne7 Nge7+/–) 14.Qc8+- Bd8 15.Bc7 Ke7?? (15...Qf6 16.Rc1 Bh1 17.Qb7 Nge7 18.Bd8 Kd8 19.Qa8 Kc7 20.Qh8 Qg5+-) 16.Bc6 (better is 16.Bd8 Nd8 17.Qd7 Kf6 18.Qd8 Ne7 19.Qd6 Kf5 20.Bd3 Be4 21.Be4 Ke4 22.Qd4 Kf5+-) 16...bc6 (16...Nf6 17.Bd5 Nd5+-) 17.Qd8 Ke6 18.Qd6 (better is 18.Ne2 Kf5 19.Qd7 Be6 20.Ng3 Qg3 21.Qd3 Kg5 22.hg3 f5+-) 18...Kf5 19.Qg6 (19.e4 Be4 20.Qe5 Kg4 21.h3 Kh4 22.Qf4 Kh5+-) 19...hg6 (19...Kg6 20.f3 f5 21.Ne2+-) 20.f3 Nf6 21.e4 (better is 21.d3 Ke6+-) 21...Ne4 22.Ne2 Ng5 23.Ng3 Kf6 24.Ne4! Ne4 25.fe4 Be4 26.Rf1 Ke7 27.Rf2 f5 28.Ke2 Kd7 29.Bf4 Re8 30.Rg1 Bd5 31.Kd3 Re4 32.Rg6 Re7 33.Re2 Re2 34.Ke2 Ke8 35.Rg7 Kf8 36.Ra7 c5 37.b5 c4 38.b6 Ke8 39.b7 Bb7 40.Rb7 c3 41.dc3 Kd8 42.h4 Kc8 43.Rc7 Kd8 44.a4 Ke8 45.a5 Kd8 46.a6 Ke8 47.a7 Kd8 48.a8R 1–0. nordlicht (2175) – harzer, gameknot.com, 2006.

4.Nf3 d4? 5.Ne5+- Bb4? (5...Nf6 6.Bc4 Be6 7.Qe2+-) 6.Qf3 (6.Bd4?! Nf6 7.g4 Be6+-; 6.ed4?! Nc6 7.Bc4 Nh6+-) 6...Qc8 (6...Ne7 7.Bc4 0-0 8.Qb7 Nd7 9.Nd7 Qd7 10.Qb4 Rab8+-) 7.Qd5 (7.Qd5 Ne7 8.Qf7 Kd8 9.Bc4+- (9.Qg7?! Rg8 10.Qf7 Qe6 11.Bd4 Nbc6+-)) 1–0. GuestXJBP – GuestFQGF, freechess.org, 2020.

5.Bg7 f6 6.Bh8 Qe7 7.Qh5 Qf7 (7...Bg6 8.Qd5 Nh6 9.Qb7+-) 8.Qf5 Nc6 9.Nf3 Nce7 10.Bd3 (better is 10.Qd3 0-0-0 11.Qd4+-) 10…Nf5 (10...Nf5 11.Bf5 Ne7+/–). Valpa – Cla114, playchess.de, 2005.

5.Bg7 Nf6 6.Bh8 Qd6 (6...Nbd7 7.Ne2+-) 7.c3 Ba5 8.h3 (better is 8.Qf3 Bb1 9.Rb1 Ne4+-) 8...Nc6 9.Nf3 0-0-0 10.Bf6 Qf6 11.Bb5 Ne7 12.Nd4 Bg6 1–0. pittol – friuly, gameknot.com, 2015.

6.Bh8 Qe7 A) 7.Nc3 c6 (7...Ngf6 8.Nb5 Ba5 9.Nd4 Be4 10.Rb1 Bb6 11.f3 Bg6 12.Nge2+-; 7...Ndf6 8.Nge2 0-0-0 9.a3 Ba5 10.Qb1 Ne4 11.Qb5 Bc3 12.Nc3+-; 7...Be6 8.Nb5 Ba5 9.Bc3 Bb6 10.a4 a5 11.Nf3 Ngf6 12.Nbd4+-) 8.Nge2 Ngf6 9.Rb1 0-0-0 10.Nd4 Bg4 11.Bf6 Nf6 12.Be2+-; B) 7.Bc3 Bc5 (7...Bd6 8.Nf3 Ngf6 9.Nd4 Bg6 10.Nb5 Ne4 11.d3 Nc3 12.N1c3+-; 7...a5 8.Nf3 Ngf6 9.a3 Bd6 10.Nd4 Bg6 11.Be2 c6 12.d3+-) 8.Nf3 Ngf6 9.Nd4 Bg6 10.Bb5 c6 11.Be2 Bd4 12.Bd4+-; C) 7.Bd4 Ngf6 (7...Bd6 8.Nc3 c5 9.Bg7 d4 10.Nb5 Be5 11.Be5 Ne5 12.c3+-; 7...c5 8.Bb2 Ngf6 9.Nf3 0-0-0 10.a3 Ba5 11.Bb5 Rg8 12.Rg1+-) 8.Nf3 Bd6 9.Nc3 c5 10.Bf6 Nf6 11.Bb5 Kf8 12.0-0+-.

6.Bh8 f6 7.c3 Be7 (7...Bd6 8.Qh5 Bg6 9.Qd5 Nh6 10.Bg7 Nf5 11.Qe6 Qe7 12.Qg8+-) 8.Qh5 Bg6 9.Qd5 Nh6 10.d4 Nb6 11.Qf3 Kf8 12.Qb7 +-.

6.Bh8 f6 7.Be2 Nf8 (7...Ne7 8.Bg4 (8.Bg7 Ng6 9.c3 Bd6 10.Nf3 Qe7 11.Bh6 Nde5 12.Ne5+-) 8...Be4 (8...Bg6 9.Bd7 Qd7 10.Bf6+- Qc6 11.Bc3 Bc3 12.dc3+-) 9.f3 Bf5 10.a3 Bg4 11.fg4 Bd6 12.g5+-; 7...Qe7 8.a3 Bd6 9.Nc3 c6 10.g4 Bg6 11.h4 Ba3 12.Qb1+-; 7...Ne5 8.Nf3 Ng6 9.Nd4 Be4 10.f3 c5 11.Ne6 Qd6 12.Bb5+-; 7...Nh6 8.Bg7 Nf7 9.Nf3 Qe7 10.a3 Bd6 11.Nc3 c6 12.Nd4+-) 8.Nf3 (8.c4!? Be7 9.Qa4 (9.cd5 Ng6+- 10.Bh5 Qd5 11.Nc3 Qd7 12.e4+-) 9...Bd7 10.Bh5 Ng6 11.Qb3 Bc6 12.Qc2+-) 8...Ng6 9.c3 (9.a3 Bc5 10.d4 Bf8 11.Bd3 Qd7 12.c4+-) 9...Bd6 (9...Bc5 10.Nh4 Bb1 11.Qb1 Nh4 12.Qh7+-) 10.Nd4 Qd7 (10...Be4 11.f3 Nh8 12.fe4+-) 11.Nf5 Qf5 12.Bf6! (12.Bg4+-) 12...Nf6 (12...Qf6 13.Qb3 Combination; 12...Nf6 13.Qa4 Pinning) 13.d4 (13.Qa4 c6+-) 13...Ne4?! (13...Nh4 14.Rg1 0-0-0+-) 14.0-0 Nf6 15.Nd2 Ne7 (15...0-0-0 16.c4 Nh4 17.Qb1+-) 16.Rb1 0-0-0 17.f4 (17.Qa4 Kb8+-) 17...Rg8 (17...Qe6 18.Rf3 Nf5 19.c4+-) 18.c4 Nd7 (18...Qh3 19.Bf3 Nf5+-) 19.c5 (19.c5 Nc5 20.dc5 Bc5 21.Qb3+-) 1–0. pzn2pawn (1870) – Slarti Bartfast (1615), redhotpawn.com, 2016.

6.Bh8 f6 7.Qh5!? Bg6 8.Qd5 Ne7+- 9.Qb7 Rb8 10.Qa7 Nc5 11.a3 Nc6 12.Qb8 +-.

6.Bh8 Ngf6 A) 7.Ne2 Bg6 (7...a6 8.Nd4 Bg6 9.Be2 Qe7 10.Bg7 0-0-0 11.0-0 Rg8 12.Bh6+-; 7...Ne4 8.f3 Nef6 9.g4 Be6 10.g5 Ng8 11.f4 Bg4 12.Rg1+-; 7...Qe7 8.Nd4 Bg4 9.f3 Be6 10.c3 Bc5 11.Qb3 Bb6 12.Ne6+-) 8.a3 Bd6 9.Nbc3 c6 10.Nd4 Qe7 11.Rb1 Ne4 12.Ne4+-; B) 7.Nf3+- c6 (7...a6 8.Be2 Qe7 9.Bg7 0-0-0 10.Nd4 Bg6 11.0-0 Rg8 12.Bh6+-; 7...Qe7 8.Nd4 Bg4 9.f3 Be6 10.c3 Bc5 11.Qb3 Bb6 12.Ne6+-; 7...Ne4 8.a3 Bd6 9.Be2 Qe7 10.d3 Nec5 11.Nd4 Be6 12.Nb5+-) 8.Be2 Qe7 9.Bg7 0-0-0 10.Nd4 Bg6 11.0-0 Bc5 12.Nf3+-; C) 7.a3 Be7 (7...Bc5 8.d4 Bd6 9.c4 dc4 10.Bc4 Qe7 11.Nf3 Ne4 12.Qb3+-; 7...Bd6 8.Nc3 Qe7 9.Nb5 a6 10.Nd6 Qd6 11.Nf3 0-0-0 12.Bf6+-; 7...Bf8 8.Nf3 Bd6 9.Nc3 c6 10.Rb1 Qc7 11.Rb3 0-0-0 12.Bf6+-) 8.Nf3 Nb6 9.Nc3 Qd7 10.Nb5 0-0-0 11.Bf6 Bf6 12.Rb1+-.

5.Bb5 Nge7 6.Bc3 d4 7.Bd4 Qd5 =.

5.Bc3 Bb4?? 6.Bg7+- f6 (6...d4 7.Bh8 de3 8.fe3 Qh4 9.g3+-) 7.c3 Bb1 (7...Bd6 8.Bh8 Qd7 9.d4+-) 8.Rb1 Ba3 (8...Qd7 9.Bh8 (9.cb4?! Qg7 10.Ne2 0-0-0+-) 9...Bd6 10.Rb7+-) 9.Qa4 (better is 9.Qh5 Kd7 10.Qh3 Ke8 11.Bh8 Qd7+-) 9...Qd6 10.Rb3 Bc1 11.Ne2 (better is 11.Bh8!? Nge7 12.Qh4 f5+-) 11...Bd2 12.Kd2 0-0-0 (12...Nge7 13.Bh8 Kf7 14.Bf6 Qf6 15.Rb7 Qf2 16.Qf4 Qf4 17.Nf4+-) 13.Bh8 Nh6 14.Bg7 Nf5 15.Qg4 Nce7 (15...Qd7 16.Bf6 Rf8 17.Bd4+-) 16.Nd4 Kb8 (16...h5 17.Qh3 Qd7 18.Bf6+-) 17.Nf5 d4 18.ed4 (better is 18.Nd6 de3 19.Ke2 Rd6+-) 18...Qe6 19.Rb5 (better is 19.Bd3!? Nd5+-) 19...Rg8 20.Bd3 (better is 20.Qf3 Qa2 21.Kc1 c6 22.Ne7 cb5 23.Ng8 Qa3 24.Kd2 Qa2 25.Ke3 Qe6 26.Qe4 Qg8 27.Qf4 Ka8 28.Qf6 Qb8+-) 20...Rg7 21.Qg7 Qa2 22.Bc2 Qe6 1–0. Heat – rychess, Live Game Caissa's Web, 2004.

5.Bc3 Nb4 6.d3 c5 =.

5.Nf3 Ne5= 6.Ne5 Qf6 7.d4 0-0-0 (7...Bd6 8.Nd3=) 8.c4 (better is 8.a3!?+=) 8...Bb4=+ 9.Nd2 Bc3 10.Rc1 Bb2 11.Qa4?? (better is 11.cd5 Bc1 12.Qc1=) 11...Bc1-+ 12.Qa7 c6?? (better is 12...Bd2!? 13.Kd2 c5 14.Qc5 Kb8-+) 13.Qa8 Kc7=+ 14.Qa5 Kc8 15.Nb3 Bb2 16.Nc5+/– Bc3 17.Qc3+- b6 18.Na4 Kc7 19.cd5 Ne7 20.Bb5?? Rd5 21.Bc4+/– Ra5 22.Qb4 Nd5+= 23.Bd5 Rb5 24.Qc4 Rb1? 25.Ke2+- Rh1 26.Qa6?? Rb8 (27.Bc6 Bg4 28.f3 Bc8 29.Qa7 Rb7 30.Bb7 Bb7+-; 26...cd5!? 27.Qa7 Kd6=). Heynen,Karel – Vettenburg,Louis, corr Belgium, 1983.

4.a3 c6 5.d4 (5.Nf3 Nf6=) 5...Nd7 6.Bd3 Nb6 (6...Bd3 7.Qd3 Qg5 8.g3+=) 7.Bf5= ef5 8.Nd2 g6 (8...a5 9.ba5 Na4 10.Bc1=) 9.Ngf3 Ne7 10.c3 Bg7 11.0-0 Nc4 12.Nc4 dc4 13.Qe2 b5 14.Rfd1 0-0 15.Rd2 Qd6 16.Rad1 Rad8 17.e4 fe4 18.Qe4 Nf5 19.Ne5 (better is 19.Re2!?=) 19...Rfe8 20.Qc6? (better is 20.g4 Ne7 21.g5-/+) 20...Qc6?? (20...Be5 21.Qd6 A) 21...Nd6?! 22.de5 Re5 23.Kf1+= (23.Rd6?? Rd6 24.Rb1 Rd2-+); B) worse is 21...Rd6 22.de5 Rd2 23.Rd2=; C) 21...Bd6-+) 21.Nc6+/– Rd6 22.Na5 Red8? 23.Nb7+- R6d7 24.Nd8 Rd8 25.Re1 Nd6 26.Rde2 f5 27.Re6 h5 28.Bc1 Kh7 29.Bg5 Rd7 30.Re7 Re7 31.Re7 a6 32.Re6 Nb7?? 33.Ra6 Bh6 34.Bh6 Kh6 35.Rb6 Nd8 36.Rb5 Ne6 37.a4 Nf4 38.a5 Ne2 39.Kf1 Nc3 40.Rc5 Na4 41.Rc4 g5 42.b5 Nb2 43.Rb4 Nd3 44.Ra4 Nc5 45.Ra1 Ne6 46.d5 Nc5 47.a6 Kg6 48.a7 Nb7 49.a8Q Nd6 50.Ra6 (50.Ra6 Kf6 51.Qh8 Ke7 52.Qg7 Nf7 53.Qf6 Ke8 54.Ra7 Nd6 55.Qe7; 50.Qg8 Kf6 51.Qe6 Kg7 52.Ra7 Kf8 53.Qd6 Ke8 54.Qe7) 1–0. Fournier,Frederic (1880) – fratelli84, Active, 2008.

4.a3 Nc6 5.Bb5 Nf6 6.Bf6 Qf6 7.c3 a6 8.Ba4 Qg6 9.g3 0-0-0 10.Bc6 bc6 11.h3 Bd6 12.Ne2 h5 13.f4 Bd3 14.Kf2 e5 15.Rg1 ef4 16.Nf4 Bf4 17.gf4 Qf5 18.h4 f6 19.Rg7 Rhg8 20.Qg1?? (better is 20.Rg2=) 20...Rg7-+ 21.Qg7 Qh3 (better is 21...Bb1 22.Ke1 Be4-+) 22.Qg2-/+ Qf5 (22...Qh4!? 23.Qg3 Qh1=+) 23.Qh1 Rg8 24.Ke1?? (better is 24.Qd1=) 24...Bb1-+ 25.Kf2 Be4 26.Qh2 Rg2 27.Qg2 Bg2 28.Kg2 Qg4 29.Kf2 Qh4 30.Ke2 Qh2 31.Kd3 Qg2 32.Rc1 h4 33.a4 h3 34.b5 (34.a5 h2-+) 34...cb5 35.ab5 ab5 36.Rb1 (36.Ra1-+) 36...h2 (better is 36...Qe4 37.Ke2 Qb1 38.Kf2-+) 37.Rb5 (37.Ra1 Kd7-+) 37...Qe4 38.Ke2 Qc4 (39.Kf3 h1Q 40.Kg3 Qb5 41.c4 Qbb1 42.f5 Qbe1 43.Kf4 Qe4) 0–1. Geojr – dijk, HCL–B1738 playchess.de, 2003.

4.Na3 Nf6 5.c3 Nc6 (5...a5 6.b5-/+) 6.Qa4 Bd6 (6...Nd7 7.Nf3=+) 7.Nb5 0-0 8.Na3 (8.Nd6!? cd6 9.Nf3=+) 8...Ne5 9.c4 dc4 10.Nc4 Nc4 11.Bc4 Ne4 (11...c6 12.Qb3-/+) 12.Nf3 (better 12.d3!? Qg5 13.de4 Qg2 14.ef5 Qh1 15.Ke2=) 12...c6-/+ 13.Ba3? (better 13.Be2 a5 14.b5-/+) 13...b5-+ 14.Qa5 (14.Qb3 bc4 15.Qc4 a5-+) 14...bc4 (14...Qa5 15.ba5 Ba3 16.Be2-+) 15.Qd8 Rfd8 (15...Rad8?! 16.Rc1-+) 16.0-0 (16.Nd4 Be5 17.f3 Nd6-+) 16...Bg4 (better 16...a5!? 17.Bb2 ab4 18.Rfc1-+) 17.Nd4 Nd2 18.Nc6 (18.Rfc1 e5 19.Nc6 Rdc8-+) 18...Rdc8 19.Rfc1 (19.f3 Nf1 20.Rf1 Bf3 21.gf3 Rc6-+) 19...Rc6 20.b5 Ba3 (20...Rb6!? 21.Bd6 Rd6 22.f3-+) 21.bc6 Bc1 22.Rc1 Rc8 (better 22...Bf5!? 23.Rd1 c3 24.Rc1-+) 23.Rc2 Be2 (better 23...Bf5 24.Rd2 c3 25.Rd4-+) 24.Rd2 Bd3 25.Rb2 (25.h3-+) 25...g6 26.Rb7 (26.Rd2 Rc6 27.f3 c3-+) 26...Rc6 27.Ra7 c3 28.Ra8 Kg7 29.Rd8 c2 30.Rd3 c1R 31.Rd1 Rd1 0-1. felixrbran - wiles (1750), Rated Correspondence game, lichess.org, 2013.

4.b5 Bc5?? 5.Bg7 Kd7 6.Bh8 f6 7.Nc3 Nh6 8.Qh5 (8.Bg7 Nf7+-) 8...Bf8 (8...Qh8 9.Qh6 Bf8 10.Qh5+-) 9.Bd3 Bg4 (9...Bd3 10.cd3 Bd6 11.Nf3+-) 10.Qh4 1–0. Valpa – Aggie, playchess.de, 2002.

4.b5 Qd6 5.Nf3 Qc5 6.Nd4 Bg6 7.Be2 (7.Ba3 Qb6=) 7...Nd7 8.0-0 0-0-0 9.a4 (9.c4 dc4 10.Ba3 Qb6 11.Bf8 Nf8 12.Bc4 Nf6=) 9...e5 10.Nf3 (10.Ba3 Qb6 11.Bf8 Rf8=) 10...Bc2 11.Qc1 Bb1 12.Qb1 f6 (12...e4 13.Nd4 Qb4 14.a5=) 13.a5 (better 13.Rc1 Qb4 14.d4+=) 13...Nh6? (13...Qb4!?+=) 14.Rc1 (14.Ba3 Qa3 15.Ra3 Ba3+-) 14...Qb4 (14...Qd6 15.Ba3 Qe6 16.Qc2+-) 15.a6 (15.d4 e4 16.Qc2 Nc5+-) 15...b6 16.d4 ed4 17.Nd4 (17.Bd4?! Qb1 18.Rab1 Bd6=) 17...Bc5?? (better 17...Ne5+-) 18.Qc2 Bd6 (18...Nf5 19.Bc3 Ne3 20.fe3 (20.Bb4?! Nc2 21.Nc2 Ne5+-) 20...Bd4 21.Bb4 Be3 22.Kf1+-) 19.Ba3 Qa3 20.Ra3 Nf7 (20...Ne5 21.Rc3 Rd7 22.f4+-) 21.Qc6 Bc5 (21...Nde5 22.Qb7 Kd7+-) 22.Qb7 1–0. GuestJLXB – GuestSQJG, freechess.org, 2020.

4.b5 Ne7 5.c4 dc4 6.Bc4 Nc8 7.Nf3 Be7 8.Bg7 (8.Nd4 Bf6=) 8...Rg8=+ 9.Bb2 Rg2 10.Rg1 (10.Bf1 Rg8=) 10...Rg1=+ 11.Ng1 Nb6 12.Be2 Bd6 13.Nf3 Bg4 14.h3 (14.Nc3!?=) 14...Bh3-/+ 15.Nd4 1–0. GuestTRWH – GuestTVWK, freechess.org, 2017.

4.b5 Bg6 5.c4 c6 6.a4 cb5 (6...Nf6 7.Nf3=+) 7.cd5 Qd5 8.Bb5 Nc6 9.Nc3 (better 9.Nf3!?=) 9...Qg2-/+ 10.Qf3 Qf3 11.Nf3 Nge7 12.Nd4 (12.Ne5 a6 13.Ng6 hg6 14.Bc6 Nc6-/+) 12...a6 13.Bc6 Nc6 14.Nc6 bc6 15.0-0 (15.d4 c5-/+) 15...Bb4 (15...Rb8 16.Ba3-+) 16.d4 a5 17.Rac1 Bd3 18.Rfd1 Bf5 (18...Bc4 19.Kg2-/+) 19.Na2 (19.f3 Rb8-/+) 19...Be4 20.Kf1 (20.Nb4 ab4 21.Rc4 Ra4-/+) 20...Bd5 (20...Bf3 21.Nb4 Bd1 22.Nc6 Ba4 23.Na5 Bb5 24.Kg2-+) 21.Nc3 (21.Nb4 ab4 22.Re1 Kd7-+ (22...Ra4?! 23.e4 Kd7 24.ed5 cd5 25.Re3=+)) 21...Bc4 (21...Bb3!? 22.Re1-+) 22.Ke1 Bb3 23.Rd3? (23.Rd2 f6-/+) 23...Ke7 (23...Ba4 24.Ke2 Bb3 25.Ne4-+) 24.Kd2 (better 24.Rd2!?-+) 24...Bc4 25.e4 Bd3 26.Kd3 Rhd8 27.Na2 Ra6 (27...c5 28.Nb4 ab4 29.Rc5 Ra4 30.Rb5-+) 28.Nb4 (28.Rc4 Bd6 29.h3 f5-+) 28...ab4 29.a5 e5 (29...Ra5 30.Rc6 Rh5 31.Rb6 Rh3 32.Kd2-+) 30.Rc5 ed4 31.Bd4 (31.Re5 Kf8 32.Rc5-+) 31...Rd6 (better 31...b3 32.Rc4 Ra5-+) 32.Kc4 Rg6 (32...b3 33.Bg7 Rh6 34.Kb3 Rh2 35.Re5 Kd6 36.f4-/+) 33.f4 (33.Kb4 Rg1-/+) 33...f6 (33...Re6!? 34.Kd3-+) 34.Kb4 Rg2 (better 34...Rg4 35.Be3 Rg2-/+) 35.h4? (better 35.Rh5!? h6 36.Bb6-/+) 35...Rg4-+ 36.Rh5 h6 (36...Rf4 37.Bb6 Kd6 38.Rh7 Re4 39.Kc3-+) 37.Be3 Kf7 38.Kc4 Kg6 39.Rc5 Rh4 40.f5 Kf7 41.Kd4 Ke7 42.Bd2 Rg4 43.Rc1 Rg2 44.Bc3 Rh2 (44...Kd6 45.Rd1-+) 45.Rg1 Kf7 46.Kc5 (46.Rb1 Ra7-+) 46...h5 (46...Rc2 47.Kd4-+) 47.Kd6 (47.Rb1 Rc2 48.Rb7 Kg8-+) 47...h4 (47...Rh3 48.Bb4-+) 48.e5 (48.Kc7 Ra8 49.Rd1-+) 48...h3?? (better 48...fe5 49.Be5 Rd2 50.Kc7 Rd5-+) 49.e6= Kf8 50.Kc7 (50.e7 Ke8 51.Rg7 c5 52.Kc5 Rf2=) 50...c5-/+ 51.Kb7 (51.Rd1!? Ra7 52.Kb6-+) 51...Rd6-+ 52.Kc7 (52.Rg3 Rf2 53.Rh3 Rf5-+) 52...Rd3 53.Be1? (53.Ra1 Rc2 (53...Rc3?! 54.a6 Rcc2 55.a7=+) 54.a6 Rcc3-+ (54...Rdc3 55.a7 Ra2 56.Ra2 g6 57.a8Q Kg7 58.e7 gf5 59.e8Q Kh6 60.Qg8 Rc1 61.Qg3 Kh7 62.Qag8 Kh6 63.Qh3)) 53...Rg2 (53...Ra2 54.Bg3 Ra5 55.Bd6 Ke8 56.Rb1 Ra7 57.Kb6-+) 54.Rh1 (54.Rg2 hg2 55.Bf2 Rd1 56.Bc5 Ke8-+) 54...Re3 (54...Ke7 55.a6-+) 55.Bh4 (55.Kb6-+) 55...Ra2 56.Kb6 (56.Rd1 g5 57.fg6 Re6-+ (57...Ra5?! 58.Bf6 Ra8 59.Kd7-+)) 56...c4 57.a6 (57.Be1 Ke8-+) 57...Rea3 (57...Rb3!? 58.Kc5-+) 58.a7 (58.Be1 Rb3 59.Kc5 Ra6 60.Kc4 Rf3-+) 58...Rb2 (58...c3 59.Bg3 Ra6 60.Kb5-+) 59.Kc5 c3 60.Bg3 (60.Be1 c2 (60...Ra7?! 61.Bc3 Rc7 62.Kd4-+) 61.Bd2 Ra7 62.Rh3 Ra5 63.Kd6 Rb6 64.Kc7 Rbb5-+) 60...Ra7 (60...c2 61.Bf4 Rba2 62.a8Q Ra8 63.Rh3 R2a5 64.Kc6 Rf5 65.Bd6 Kg8 66.Rc3-+) 61.Rh3 c2 (61...Kg8 62.Bf4 c2 63.Rc3-+) 62.Bf4 (62.Rh8 Ke7 63.Bd6) 62...Rb1 (better 62...Kg8-+) 63.Rh1 (63.Rh8 Ke7 64.Bd6) 63...Rh1-+ 64.Kd6 Rd1 65.Kc5 c1R 66.Bc1 Rc1 67.Kd4 (67.Kd5 Ra5 68.Ke4 Rf1 69.e7 Ke7 70.Ke3 Ra3 71.Ke4 Kd6 72.Kd4 Rf4) 67...Ra4 (67...Rd1 68.Ke4 Ra3 69.e7 Ke8 70.Kf4 Rd4) 68.Kd5 (68.Ke3 Rc3 69.Kd2 Rh3 70.Kc2 Ra2 71.Kb1 Re2 72.e7 Ke7 73.Kc1 Rh1) 68...Ra2 (68...Rf4 69.e7 Ke8 70.Ke6 Rcc4 71.Kd6 Rfd4 72.Ke6 Rc6) 69.Kd6 Rd2 0-1. upep (1810) - swa (1770), Rated Classical game, lichess.org, 2013.

4.b5 h6 5.Nf3 a6 6.a4 f6 7.c4 (7.Nd4 Kf7+-) 7...Bb1 (7...ab5 8.ab5 Ra1 9.Ba1=) 8.Qb1+= dc4? (better 8...Ne7+=) 9.Qg6+- Kd7 10.Bc4 Ne7 (10...Qe8 11.Qe4 c6 12.Nd4 ab5 13.Be6 Kd8 14.ab5 Ra1 15.Ba1+-) 11.Qd3 (11.Qf7 Qe8 12.Qe6 Kd8+-) 11...Ke8 12.Qb3 e5?? (better 12...Nd5 13.Nd4 Ke7+-) 13.Bf7 Kd7 14.Qe6 1–0. DEFFM – gddl, freechess.org, 2016.

4.c3 Nf6 5.Nf3 Bd6 6.Na3 Be4 (6...a5 7.ba5 c6 8.Nd4=+) 7.Nd4 (7.Nb5 0-0=) 7...Nc6 (7...e5 8.Nb3=+) 8.Ndb5 (8.Bb5 A) worse 8...Bg2 9.Rg1 Be4 10.Nc6 (worse 10.Bc6 bc6 11.f4 Qd7-/+) 10...bc6 11.Bc6 Kf8 12.d3 Bh2 13.Rg5+/-; B) 8...0-0 9.Nc6 bc6 10.Bc6 Rb8= (10...Bg2 11.Rg1 Be4 12.d3 Bh2 13.Rg5=)) 8...a6 (8...Be7 9.d3 Bf5 10.Nc2=+) 9.Nd6= Qd6 10.f3 Bg6 11.b5 ab5 12.Bb5? (12.Nb5 Qd7=+) 12...0-0 (12...Ra3 13.Ba3 Qa3 14.Qb3-+) 13.c4? (better 13.Qb3!?=+) 13...Ra3-+ 14.Ba3 Qa3 15.0-0 (15.Bc6 bc6 16.Qb3 Qc5-+) 15...dc4 (15...Bd3 16.Qc1 Qa7 17.cd5 Bf1 18.Kf1 ed5 19.Bc6 Qa6 20.Kg1 bc6 21.a4-+) 16.Bc4 (16.Bc6 bc6 17.Qc1 Qa4-+) 16...Ne5 17.Bb3 Qd6 (17...Bd3!? 18.Re1-+) 18.d4 Ned7 19.Rb1? (better 19.e4 Rd8 20.Rf2-+) 19...Bb1 20.Qb1 Nd5 21.Qd3 (21.Bd5 Qd5 22.Rd1 Ra8-+) 21...b6 22.e4 (22.Rd1 Ra8-+) 22...Nf4 23.Qd2 e5 (better 23...Qd4! 24.Qd4 Ne2 25.Kf2 Nd4 26.Rd1-+) 24.de5 (24.d5-+) 24…Qd2 (24...Qd2 25.Bf7 Rf7 26.Rf2 Qe1 27.Rf1 Ne2 28.Kh1 Qf1) 0-1. felixrbran - wiles (1815), Rated Correspondence game, 2013.

4.c4 Nc6 5.a3 Nf6 6.Nf3 h6 7.Qa4 Qd7 8.b5 Nb8 9.Ne5 Qc8 10.cd5 ed5 11.b6 Bd7 12.Nd7 Nfd7 13.bc7 Nc6 14.Nc3 Nb6 15.Qf4 a6? (15...Qd7!? 16.Nb5 a6+/–) 16.Bd3 Ne7 17.Qd6 (better is 17.Rc1!? Qd7+-) 17...Qe6 18.Qe6 fe6 19.Rc1 Nc6 20.Ne2 Kd7 21.Nd4 Na4 22.Nc6 bc6 23.Rb1?? (better is 23.Be5 Ba3 24.Rb1+/–) 23...Nb2=+ 24.Rb2 Ba3 25.Ra2 Bb4 26.Ra6 Kc7 27.Ke2 Ra6 28.Ba6 Ra8 29.Bd3 Ra2 30.Rd1 c5 31.e4 c4 32.Bb1 Rb2 33.ed5 ed5 34.Ke3 Bc5 35.d4 cd3 36.Kd3 Rf2 37.Rc1 Kd6 38.Rc2 Rf4 39.Ba2 h5 40.h3 Rf5 41.Re2 Bg1 42.Bb3 Bb6 43.Rb2 Bd8 44.Bd1 Bf6 45.Ra2 h4 46.Ra6 Ke5 47.Ra2 Rf1 48.Bf3 d4 49.Rc2 Re1 50.Re2 Re2 51.Be2 Kf4 52.Bf3 ½–½. Antoniadis,Nikolaos – Troupis,Konstantinos (2125), Ambelokipi op, 1999.

4.Be2 Bb4?? 5.Bg7 f6 6.Bh8 Nc6 7.Bh5 Bg6 8.Qg4 Ne5 (8...Kd7 9.Bg6 hg6 10.Qh3+-) 9.Bg6 Ng6 10.Nf3 (better 10.Qb4!? Nh8 11.Qb7 Ne7+-) 10...Qe7 11.Nd4 (11.Nh4 f5 12.Ng6 fg4 13.Ne7 Ne7+-) 11...f5 (11...Kd7 12.Ne6! f5 13.Qf5 Qe6 14.Qe6 Ke6 15.Bc3+-) 12.Qh5 (12.Qg3 Kd7 13.Be5 Ne5 14.Qe5 Bd6+-) 12...0-0-0 13.Nb5 (better 13.Nf5!? ef5 14.Qf5 Kb8+-) 13...a6 (13...Nh8 14.Na7 Kb8 15.Nb5+-) 14.a4 (14.a3 Bc5 15.Bd4 ab5 16.Bc5 Qc5 17.Qh7 Qc2+-) 14...ab5 (better 14...Nh8 15.c3 Qg7+-) 15.ab5?? (15.Bd4 ba4 16.Ra4 Bd6+-) 15...Kd7?? (better 15...Nh8 16.0-0 Nf6=) 16.c3 (16.Bd4 Nf6 17.Bf6 Qf6+-) 16...Bd6 (16...Nh8 17.cb4 Nf6 18.Qe2+-) 17.Bd4 b6 (17...f4 18.Qg4+-) 18.f4 Nf6 (18...Qh4 19.Qh4 Nh4+-) 19.Qh4 (better 19.Bf6 Qf6 20.Qh7 Ne7 21.Qh5+-) 19...Nh4-+ 20.0-0 Rg8 21.Rf2 (21.g3 h5-+) 21...Ng6 (better 21...Ne4 22.g3 Nf2 23.Kf2-+) 22.h3 (22.Bf6 Qf6 23.d4 e5 24.fe5 Ne5-+) 22...Nh4 (22...Ne4!? 23.Rf1 Nh4 24.Rf2-+) 23.d3 (23.Bf6 Qf6 24.Ra2 Qg6-+) 23...Rg3 (better 23...e5!? 24.fe5 Be5 25.Bb6 cb6 26.Raa2-+) 24.Nd2 (24.Raa2 e5 25.fe5 Be5-+) 24...Qg7 25.Ra8 (25.Kf1 Ng2 26.Ke2 Rh3-+) 25...Rg2 26.Rg2 (26.Kf1 Rf2 27.Kf2 Qg2 28.Ke1 Qg1 29.Ke2-+) 26…Qg2 0–1. Akrapovik – hamidpeyvand, lichess.org, 2019.

4.Be2 Nc6 5.b5 Nb4 6.a3 Nc2 7.Kf1 Na1 8.Ba1 Bd6 9.Bg7+- Nf6 (9...Be5 10.Be5 f6+-) 10.Bh8 Qe7 11.Nf3 0-0-0 12.Bf6 Qf6 13.Ng1 (13.d4 Rg8+-) 13...Be4 (13...d4 14.ed4 Qd4 15.Nf3+-) 14.f3 (14.d3 Bf5+-) 14...Bg6 (14...d4 15.d3 Bg6 16.e4+-) 15.Nc3 (15.d4 Rg8+-) 15...Qh4 (15...d4 16.ed4 Qd4 17.a4+-) 16.Nh3 (16.f4 d4 17.Nf3 Qf6 18.Nd4 Bf4 19.ef4 Rd4+-) 16...h5 (16...d4 17.Qa4+-) 17.a4 (17.d4 Bf5 18.Nf2 Ba3+-) 17...Rg8 (17...d4 18.ed4 Qd4 19.Ne4+-) 18.Qe1 Qf6 19.Qf2 Bf5 20.Ng1 h4 (20...Kb8 21.a5+-) 21.e4 Bh7 22.ed5 ed5 23.Nd5 (23.g4 hg3 24.hg3 d4+-) 23...Qa1 24.Qe1 Qd4 (24...Qe1 25.Ke1 Rg2 26.Nh3 Rh2 27.Rh2 Bh2 28.d4+-) 25.Ne3 f5 (25...Bb4 26.Nc4 Re8+-) 26.Qh4 (better 26.Bc4 Re8 27.Ne2+-) 26...Bg6 (better 26...Qh4 27.a5 Qd4-+) 27.Qf2 (better 27.Qd4 f4 28.Nc4+-) 27...f4 (27...Bc5 28.Nd1 Qb4 29.Qg3+-) 28.Ng4 (28.Nc4!? Qa1 29.Qe1 Qa4 30.Nd6 cd6 31.Qc1 Kd7+-) 28...Qa1 (28...Qa4 29.Qe1+-) 29.Qe1 Qd4 (29...Qa4 30.Qc1+-) 30.Nh3 (30.a5 Re8+-) 30...Bc5 (30...Qa4 31.Qc1 Rd8 32.Rg1+-) 31.Ng5 (31.a5!? Rh8+-) 31...Bd3 32.Ne4! Be2 (32...Be4 33.fe4 Passed pawn) 33.Qe2 Rh8 (33...Bb6 34.Nc3 Rd8 35.Nf2+-) 34.h3 (better 34.Nc5 Qc5 35.Qe5 Qc4 36.Kf2 Rd8+-) 34...Re8 (34...Qa1 35.Qe1 Qa4 36.Nc3+-) 35.d3 (35.Nd6 cd6 36.Qe8 Kc7 37.Qe7 Kc8 38.Qe6 Kc7+-) 35...b6 (35...Be7 36.Qd1+-) 36.Ngf6 (better 36.Nd6! cd6 37.Qe8 Kc7+-) 36...Re6 37.Ng4 Kb7?? (37...Re8 38.Nd6 cd6 39.Qe8 Kc7+-) 38.Ngf2 (better 38.Nc5 bc5 39.Qe6 Qa1 40.Qe1 Qa4 41.Qe4 Qe4 42.fe4+-) 38...Qa1 (38...Kb8 39.Qa2 Re8 40.Kg1+-) 39.Qe1 Qb2 (39...Qa2 40.Nc5 bc5 41.Ne4+-) 40.h4 (40.Nc5 bc5 41.Qe6 Qa1 42.Qe1 Qa4 43.Qe4 Qe4 44.Ne4 c4 45.dc4 a5 46.ba6 Ka6+-) 40...Rd6 (40...Bf2 41.Qf2 Qb1 42.Qe1 Qd3 43.Kg1 Qd4 44.Kh2 Rh6+-) 41.h5 (better 41.Nd6 Bd6 42.h5 Bb4+-) 41...Rd3 (41...Rd5+-) 42.Nd3 (42.Nd3 Qd4 43.Nec5 bc5 44.Ne5+-) 1–0. Akrapovik (1640) – m_kabir (1630), lichess.org, 2020.

4.Ne2 Bb4?? 5.Bg7+- Nh6 6.Bh8 (6.Bh6?! Qf6 7.c3 Bd6+-) 6...f6 (6...Nc6 7.c3 Bd6 8.Qa4+-) 7.Nd4 (7.Bg7 Nf7+-) 7...Ke7 (7...Kf7 8.Nf5 Nf5 9.Qh5 Kg8 10.Qg4 Kh8 11.Qb4+-) 8.Bg7 Nf7 (8...c5 9.Ne6 Be6 10.Bh6+-) 9.Nf5 ef5 10.Qh5 1–0. Ackermann,Robert – Klein,Waldemar, Mittelfranken–chA, 1998.

4.Ne2 Nd7 5.Ng3 Bg6 6.h4 h6 (6...Bb4?? 7.Bg7 Be7 8.Bh8 Bh4 9.Nh5+-) 7.h5 Bh7 8.Be2 Ngf6 (8...Bb4?? 9.Bg7 Qg5 10.Bh8+-) 9.0-0 (9.a3!?=+) 9...Bb4-/+ 10.a3 Bd6 11.f4 c6 12.d3 0-0 13.Nd2 Qc7 14.Nh1 (14.Rb1!? Rfe8-/+) 14...e5 15.g3 (15.fe5 Be5 16.Bd4 c5 17.Be5 Qe5-+) 15...Qb6 16.fe5 Be5 (16...Qb2?! 17.ed6 Qe5 18.e4-+) 17.Be5 Qe3 (17...Ne5?! 18.d4 Ned7 19.Rb1-+) 18.Kg2 Qe5 19.Nf2 Rfe8 20.Bf3 Qd6 21.Qb1 b6 22.Qb4 Qe5 23.Rfe1 Qe1 24.Re1 Re1 25.Ng4 (25.c4 Ne5 26.Qa4 dc4 (< 26...Nf3 27.Nf3 Ree8 28.Qc6-+) 27.Bc6 Rd8-+) 25...Rae8 26.Nf6 Nf6 27.Qa4 b5 28.Qd4 (28.Qb4 Rc1 29.Qb2 Ree1-+) 28...Bf5 (28...R8e2!? 29.Be2 Re2 30.Kf1 Rd2 31.Qf4 Bd3 32.cd3 Rd3 33.Qb8 Kh7 34.Qf4-+) 29.Nb3 Rb1 (29...a6!? 30.Qf4 Be6 31.Nd4-+) 30.Qa7 Rb2 31.Qc5 Bd7 32.Nd4 Rc8 33.g4 Kh7 34.Kg3 Rb1 35.c3 Re1 36.Kf4 Rce8 37.Nc6 (better is 37.Nc2 R1e5 38.Qa7-+) 37...R8e3! 38.Nb4 (38.Qe3 Re3) 38...Bg4! 39.Bg4 (39.Qe3 Nh5 40.Kg4 Re3 41.Bd5 Nf6 42.Kf4 Nd5 43.Nd5 Rd3 44.Ke4 Rd5 45.Kd5-+) 39...Nh5! 40.Bh5 g5 41.Kg4 Rg1 42.Kf5 Rf1 43.Bf3 Rff3 44.Kg4 f5 (45.Kh5 Rh3) -+. FABOLOUS – ARMAGEDON_8, ChessWorld.net, 2003.

4.Ne2 Nf6 5.b5 (5.a3 a5+=) 5...c5 6.Ng3 Bg6 7.Be2 Bd6 8.f4 0-0 9.0-0 Nbd7 10.a4 Rc8 11.c4 Nb6 (11...dc4 12.Na3=) 12.d3 dc4 13.dc4 Ne4 (13...Qe7 14.a5 Na8 15.Nd2=) 14.a5 (14.Ne4 Be4 15.a5 Na8+=) 14...Na8 (14...Ng3 15.hg3 Na8 16.Bf3=) 15.Nc3 (15.Ne4!? Be4 16.Nc3+/–) 15...Ng3= 16.hg3 Rc7 17.Bh5 Rd7 18.Qf3 (better is 18.Bg6!? hg6 19.Qf3=) 18...Bd3-/+ 19.Rfd1 Bc4 20.Qe4 Bd5?? (better is 20...Bb3 21.Rdc1 f5-+) 21.Nd5+= ed5 22.Rd5 (better is 22.Qd5!? Qe7 23.e4+=) 22...Nc7=+ 23.Rg5 Ne6 24.Rg4 Re8 25.Rh4? (better is 25.Qc4=) 25...Nf4?? (better is 25...g6 26.Bf3 Nd4-+) 26.Bf7!+- Rf7 (26...Kf7 27.Qf5) 27.Qh7 Kf8 28.ef4 Ke7? (better is 28...Re3+-) 29.Qe4 (29...Kd7 30.Qb7 Qc7 31.Qd5+-; 29.Qg6!? Rg8+-) 1–0. Otte,Marco – Blom,Jan, Wag.Intcomp, 1997.

4.Nf3 c5 5.bc5 Bc5?? (better 5...Nc6+=) 6.Bg7+- 1–0. GuestBDPM – mora, freechess.org, 2019.

4.Nf3 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.Nf3 e6).

4.Nf3 Bg6 5.Be2 Nf6 6.b5 c6 7.a4 a6 8.Nh4 ab5 9.ab5 Ra1 10.Ba1 Qa5 11.Bc3 Bb4 12.Ng6 hg6 13.0-0 Bc3 (13...Nbd7 14.Bb4 Qb4 15.Nc3=) 14.Nc3+= Ke7 15.Qa1 Qb6 (15...Qc7 16.g3+=) 16.Qa3 (16.bc6!? bc6 17.Qa8+=) 16...c5= 17.Na4 Qa7 (17...Qd6 18.Qc5 Qc5 19.Nc5=) 18.Qc5 (better 18.d4!? b6 19.Ra1+=) 18...Qc5= 19.Nc5 Nbd7? (better 19...Rc8!? 20.Nb7 Rc2=) 20.Nb7+- Nb6? (better 20...Ra8!? 21.d4 Ne4+-) 21.Ra1 Nfd7 22.Ra6 Rc8 23.c3 Nc4 24.Bc4 dc4 25.Na5 Ke8 (25...Rc5 26.Nc6 Kf6 27.Nd4+-) 26.b6 Rb8 (26...Rc5 27.b7 Rb5 28.f4+-) 27.b7 Nc5 (27...e5+-) 28.Ra8 Kd7 29.Rb8 Kc7 30.Rc8 Kd6 (30...Kb6 31.b8Q Ka5 32.Qb4 Ka6 33.Ra8) 31.b8Q (31.b8Q Kd5 32.Rd8 Nd7 33.Rd7 Ke4 34.Qf4) 1-0. DEFFM – GuestXMVJ, freechess.org, 2021.

4.Nf3 h5 5.Be2 h4 6.Nd4 Qg5 (better 6...Be4 7.f3 Bg6=) 7.0-0?? (7.Nf5 Qf5 8.a3 Nf6+=) 7...Bb4?? (better 7...Bh3! 8.Bf3 Bg2 9.Bg2 h3-+) 8.Nf5+= ef5 9.h3 Bd6 10.f4 Qg3 (10...Qg6 11.Nc3 c6 12.a3=+) 11.Qe1 (better 11.Bh5 Nf6 12.Rf3 Nh5 13.Rg3 hg3 14.Nc3+-) 11...Qe1 12.Re1 f6 13.Nc3 c6 14.Bf3 Nd7 15.d4 (15.Rab1!?=+) 15...0-0-0-/+ 16.a4 Bb4 17.Re2 a5 18.Na2 Bd6 19.Nc1 Nb6 20.Ba3 Ba3 21.Ra3 Nc4 22.Rc3 Re8 23.Nb3 Ne7 24.Nc5 (24.Re1 b6-/+) 24...Ng6 25.Kf2 Re7 26.Nd3 b6 27.Nb2? (better 27.Rb3-/+) 27...Nb2-+ 28.Rc6 Kb7 (better 28...Kd7 29.Rb6 Nd1 30.Ke1 Nc3-+) 29.Rd6? (29.Bd5 Rd8 30.Rd6 Kc7 31.Rd8 Kd8-+) 29...Na4 (better 29...Nd1 30.Kf1 Kc7 31.Rd5 Ne3 32.Re3 Re3 33.Rf5-+) 30.Rd5 Nc3 (30...Kc7!? 31.Rf5 Nc3 32.Rd2-+) 31.Ra5 Kc7 32.Ra7 Kd6 33.Re7 (33.Ra6 Ne2 34.Rb6 Kc7 35.Rb7 Kc8 36.Re7 Ne7 37.Ke2 g5-+) 33...Ne7 (33...Ke7?! 34.Re1-+) 34.Rd2 b5 35.Rd3 b4 36.Bb7 Rb8 37.Ba6 (37.Bf3 Rc8-+) 37...Rb6 (better 37...Kd5!? 38.Kf3 Rb6 39.Rc3 bc3 40.Bf1-+) 38.Bc4 Ned5 39.Bb3 (39.Kf3 Rc6 40.Bb3 Ra6-+) 39...g5 (39...Ne4 40.Kf3-+) 40.fg5 fg5 41.Kf3 Kc7 (41...Ra6 42.g3 hg3 43.Kg3 Ne3 44.h4-+) 42.g3 (42.Bd5 Nd5 43.e4 Nf4-+) 42...hg3 43.Kg3 Re6 44.Bd5 (44.Rc3 bc3 (worse 44...Nc3 45.Be6 Ne4 46.Kg2+-) 45.Bd5 Re3 46.Bf3 Rd3-+) 44...Nd5 45.Kf3 g4! 46.hg4 fg4 47.Kg4 Re3 (worse 47...Ne3 48.Kf4 Nc2 49.d5-+) 48.Rd2 Kc6 49.Kf5 Kb5 50.Rh2 Kc4 51.Rh8 (51.Rd2 Re1 52.Kg5 Kc3-+) 51...Kd4 52.Rc8 (52.Rh2 Rf3 53.Kg4 Rc3-+) 52...Rc3 (better 52...Ne7 53.Kf6 Nc8-+) 53.Rd8 Rc2 54.Ke6 (54.Rb8-+) 54...Re2 55.Kd6 b3 56.Kc6 Rc2 57.Kb5 (57.Kd6 b2 58.Rb8-+) 57...b2 58.Rh8 (58.Ra8 b1Q 59.Ka4 Qb4) 58...b1Q 59.Ka6 (59.Ka4 Qb4) 59…Ra2 (59...Qb6) 0–1. Atotheking (1810) – dusanpv (1850), lichess.org, 2021.

4.Nf3 Nh6 5.Be2 Bb4?? (better 5...f6 6.a3 c5=) 6.Bg7+- Rg8 7.Bh6 Qf6 (7...Bd6 8.Nd4 Be4 9.Bf1+-) 8.c3 Nc6? (8...Bd6 9.Bf4 Bf4 10.Qa4 Nd7 11.Qf4+-) 9.Bf4 (9.Bg5 Rg5 10.Ng5 Qg5 11.cb4 Qg2+-) 9...0-0-0 (9...Rg2 10.Bg3+- (10.cb4?! Qa1 11.Nh4 Qb1 12.Qb1 Bb1 13.Ng2 Nb4+-; 10.Bc7?! Bg4+-)) 10.d4 (10.Bg5 Rg5 11.Ng5 Qg5 12.cb4 Nb4+-) 10...Ba5 11.h4 (11.0-0 Be4+-) 11...Qg6 (11...h6 12.0-0+-) 12.g3 (12.Kd2 Be4 13.Rg1 f6+-) 12...h6 (12...Bb1 13.Rb1 (13.Qb1?! Bc3 14.Kd1 Ba1 15.Qa1 Qe4+-) 13...Bc3 14.Kf1+-) 13.Qb3 (13.h5 Qf6+-) 13...b6? (better 13...Bc2 14.h5 Qh7+-) 14.Ba6 Kb8 15.Qb5 Ne7 (15...e5 16.h5 Qe6 17.Ne5 Ne5 18.Be5 Rde8+-) 16.Ne5 Qg7 (16...Bb1 17.Ng6 Bg6+-) 17.Nc6 Ka8 (17...Nc6 18.Qc6 Bc3 19.Nc3 Qd4 20.Bc7) 18.Ne7 Rd6 (18...h5 19.Qc6 Kb8 20.Bc7) 19.Bd6 (19.Bd6 Bc3 20.Nc3 Kb8 21.Qc6 cd6 22.Qb7) 1–0. Da Silva Junior,MA (1695) – Ribeiro Pereira,KL, Brazil Telecom Sesc Open, 2017.

4.f4 Qh4 5.g3 Qe7 (5...Qd8 6.Nf3=+) 6.b5 (6.a3 Nf6=) 6...Be4 (6...Qb4 7.Ba3 Qe4 8.Nf3 Qc2 9.Qc2 Bc2 10.Bf8 Kf8 11.Nc3=+) 7.Nf3= Qb4 8.Ba3 Qa5 9.Bf8 Kf8 10.Nc3 Qb4 (10...Nf6!?=) 11.Rb1+= Qa5 (11...Bf3 12.Qf3 Qe7 13.Bg2+=) 12.Bd3 (12.Ne4 de4 13.Ng5 Nf6+-) 12...Bd3= 13.cd3 Nd7 14.f5 ef5 (14...Ngf6 15.fe6 fe6 16.d4+=) 15.Nd5 g6 (15...Ne7 16.Ne7 Ke7 17.Qc2+=) 16.Rc1 (16.Qc2 Rc8+-) 16...Rc8 (16...c6 17.bc6 Qd5 18.cd7+=) 17.Qb3+- Ne7 (17...Kg7 18.0-0+-) 18.Ng5 f6?? (18...Ne5 19.Nf6 Kg7+-) 19.Nf6!+- Nf6 (19...Nf6 20.Qf7)20.Qf7 1–0. guestvckn – guestjgbm, internet free game, 2018.

4.g3 Bb4?? 5.Bg7+- Nf6 6.Bh8 Ke7 7.Bf6 Kf6 8.Qh5 Ke7 (8...Kg7+-) 9.Qh4 Ke8 10.Qd8 (better 10.Qb4 b6 11.Qc3+-) 10...Kd8 11.Bb5 (11.c3 Bd6+-) 11...Nc6 (11...Be4 12.f3 Bc2 13.a3+-) 12.Bc6 bc6 13.Ne2 (13.Nf3 Bc2 14.Ne5 Ke8+-) 13...Rb8 (13...Bc2 14.Nd4 Ba4 15.a3+-) 14.c3 (better 14.Nd4 Kd7 15.Nf5 ef5+-) 14...Bd6 15.Na3! Ba3 16.0-0?? (better 16.Nd4 Bb2 17.Nc6 Ke8 18.Nb8 Ba1 19.Nc6+-) 16...Be4 17.Nd4 c5?? (17...Rb6+=) 18.Ne2?? (better 18.Nc6 Kc8 19.Nb8 Kb8 20.f4+-) 18...c4 (18...Bd3 19.Rfe1=+) 19.Nd4 (better 19.f3 Bd3 20.Rf2+=) 19...c5?? (19...Rb6 20.f4=+) 20.Ne2?? (better 20.Nc6 Kc7 21.Nb8 Kb8 22.f4+-) 20...Bb2 (20...Bd3 21.Rfe1=+) 21.Rab1 Bd3 22.Rfe1 Bb1 23.Rb1 d4 (better 23...Ke7!?=+) 24.ed4+= cd4 (better 24...Kd7!?+=) 25.Nd4+- e5?? (better 25...Kc7 26.Nc2 Rb6+-) 26.Nc6 Kc7 27.Nb8 Kb8 (27...Ba3 28.Na6 Kc6 29.Nb4 Kd6 30.Nc2+-) 28.Rb2 Kc7 29.Rb5 (29.Rb4 Kd6 30.Rc4 Ke6+-) 29...Kd6 30.Rb7 f6 31.Rh7 Kd5 32.Ra7 Ke4 33.Ra5 Kd3 34.Kf1 (better 34.h4!? Kd2 35.h5 Kc3+-) 34...Kd2 35.Ra3 Kc2 (35...Kd3 36.h4 Ke4 37.f3 Kf5 38.Ra6+-) 36.Ke1 (better 36.h4 Kb2 37.Ra8 Kc3+-) 36...f5 37.Ke2 e4 (37...Kb2 38.h4 Ka3 39.h5+-) 38.Ke3 Kb2 39.Ra7 Kc3 40.Rf7 Kb2 41.Rf5 c3 42.Rc5 c2 43.Rc2! Kc2 44.g4 Kc3 45.g5 Kc4 46.g6 Kd5 47.g7 Ke6 48.g8Q Ke5 49.h4 Kf5 White now must not overlook the idea h5 50.h5 Ke5 (50...Kf6 51.h6 Ke5 52.h7 Kd6 53.Qe8 Kc7 54.h8Q Kb7 55.Qb2 Kc7 56.Qbb8) 51.h6 Kd6 52.h7 Kc5 53.h8Q Kb4 (53...Kb4 54.Qe5 Ka4 55.Qb3; 53...Kd6 54.Qc8 Kd5 55.Qd4) 0–1. atif_zubair – npelly, lichess.org, 2019.

4.g3 Nf6 5.c3 Nc6 (5...Bd6 6.Nf3-/+) 6.Qa4 (6.Nf3=+) 6...g6 (6...Nd7!?-/+) 7.Bb5 Qd7 8.Bc6 (8.d3 e5=) 8...bc6 9.Nf3 Bg7 (9...c5!? 10.b5 Qc8=) 10.Ne5= Qd6 11.d4 0-0 12.Ba3 Ne4 (12...Bb1!? 13.Rb1 Ne4=) 13.b5 (13.g4 Be5 14.de5 Qe5 15.gf5 Nc3 16.Nc3 Qc3 17.Ke2 Qc4 18.Kd2 a5+=) 13...c5 14.Nc6 (better 14.g4!? Be5 15.gf5+/-) 14...a6=+ 15.dc5? (15.ba6 e5 16.f3 ed4 17.cd4 Ng3 18.Bc5-+) 15...Nc5-+ 16.Qb4?? (better 16.Qf4 e5 17.Bc5 Qc5 18.Qb4 Qb4 19.Nb4 ab5 20.Nd5-+) 16...Nd3 17.Ke2 (17.Kd2 Nb4 18.Bb4 Qd7 19.Ne7 Kh8 20.Nf5 ef5 21.Bf8 Rf8 22.ba6 Qb5-+) 17...Nb4 18.Bb4 Qd7 19.Bf8 (19.Ne7 Kh8 20.Nf5 Qb5 21.Kf3 c5 22.Ng7 cb4-+) 19...Bf8 20.ba6 (20.Nd2 ab5 21.Nd4-+) 20…Qc6 (20...Qc6 21.Rd1 Bg7-+) 0-1. felixrbran - wiles (1815), Rated Correspondence game, 2013.

4.g4?! Be4 5.Nf3 Nf6 6.g5 Nfd7 7.Rg1 =+.

4.g4?! Bg6 5.Nf3 Nf6 6.g5 Ne4 7.h4 Bb4 (7...Bh5 8.d3 Nd6 9.Bg2=+) 8.Bg7 Rg8 9.Bb2 Bh5 10.c3 Bd6 11.d3 Nc5 (11...Nd7 12.Be2 (12.de4 de4 13.Nbd2 ef3 14.Nf3=) 12...Ndc5 13.Nbd2=) 12.d4 (12.Nbd2=) 12...Ne4 13.Be2 Qd7 (13...Nc6) 14.Nbd2 Nd2 15.Nd2 Be2 16.Qe2 b5?! (16...Nc6) 17.Qh5 (17.e4!?) 17...Rh8 18.0-0-0 a5 (18...Qc6!?) 19.e4 a4?! (19...c6+=) 20.ed5 ed5 21.Rde1 Kf8 22.g6 (22.Qf3 c6+/–; 22.Re2!?) 22...fg6 23.Qd5 c6 24.Qg5 Be7 (24...Kg7+=) 25.Qe5 Rg8 26.c4 (26.Qf4 Kg7 27.h5 Qd6 (27...Rf8) 28.Qe3+-) 26...a3 27.Bc3 b4 28.Qf4 (28.Ba1 Qd6 29.Qe3+/–) 28...Kg7 29.Ba1 Rf8 30.d5 (30.Qe4) 30...Kg8 31.Qh6 Bf6 32.Bf6 Rf6 33.Ne4 Rf8 (33...Rf5 34.Nc5 Qf7+-) 34.Nf6?? (34.h5 Qg7 35.Qg7 Kg7 36.Ng5 Kh6 37.Rhg1) 34...Rf6 35.dc6 (35.h5 b3 36.hg6 b2 37.Kd2 Rf2 (37...Rg6? 38.Re8 Qe8 39.Qh7 Kf8 40.Qh8 Rg8 41.Qf6 Qf7 42.Qd8) 38.Kc3 Na6-+) 35...Qc8? (35...Nc6) 36.Re7 Rf7 37.Rf7 Kf7 38.Qh7 (38...Kf6 39.h5 (39.Rg1 Qf5 40.Qh8 Kf7 41.c7 Qf4 42.Kb1 Qf5) 39...Nc6 40.Qg6 Ke7 41.Re1 Kd7 42.Qh7 Kd6 43.Rd1 Kc5 44.Rd5 Kb6 45.Rb5 Ka6=) 1–0. Gross,Gerald – Bakkers,M, email b4–01–03 (Kucharkowski), 2002.

4.h3 Nf6 5.a3 c5 6.bc5 Bc5 7.d4 Bd6 8.Nc3 0-0 9.Qd2 (9.Nf3 a6-/+) 9...Nc6-/+ 10.Nb5? (better 10.Nf3-/+) 10...Ne4-+ 11.Qe2 (11.Qd1 Qh4 12.Qe2 Bg3-+) 11...Bg3! 12.0-0-0 (12.fg3 Ng3 Theme: Double Attack) 12...Bf2 (better 12...Nf2 13.Qf3 Nh1-+) 13.Qf3 (13.g4 Bg6-+) 13...Qg5 14.Kb1 Qe3 15.Qe3 Be3 16.Nf3 Nf2 17.Re1 Nh1 18.Re3 Ng3 19.Bd3 (19.Nd2 Nf1 20.Nf1 Rfd8-+) 19...Bd3 20.Rd3 Ne4 21.Rb3 (21.Bc1 a6 22.Nc3 Rac8-+) 21...b6 22.Bc1 (22.Nc3 Na5 23.Rb4 Rac8 24.Ne4 de4-+) 22...Na5 23.Re3 (23.Rd3 Rfc8 24.Bb2 a6-+) 23...Nc4 24.Rb3 Rfc8 25.g4 (25.a4 a6 26.Na3 Na3 27.Ra3 Rc4-+) 25...a6 (25...Na5 26.Rb4 a6 27.Ne5-+) 26.Nc3 Na3! 27.Ba3 (27.Ra3 Nc3) 27...Nc3 28.Kb2 (28.Kc1 b5-+) 28...Na4 29.Kc1 Rc4 30.Bd6 (30.Bd6 Rac8 31.Ne1-+; 30.Bb2 Rac8 31.Ne1 Nb2 32.Kb2 Rd4 33.Rb6 a5-+). Delboy Smith (1730) – the_tatar (1940), ChessWorld.net, 2013.

5.b5 b6 6.Nf3 Bg4 7.Be2 Bf3 8.Bf3 Qd6 (8...c6 9.c4+/–) 9.0-0 (9.c4 c6+/–) 9...Qc5 (9...Ne7 10.c4+/–) 10.a4 c6 11.Bd4 (11.d4 Qe7+/–) 11...Qd6 12.bc6 (< 12.Bb6 c5=+) 12...Qc6 (better is 12...Nc6!? 13.Bc3 Rc8+/–) 13.Nc3+- Ne7 14.e4 de4 15.Be4 Nd5 16.Qh5 g6 17.Qf3 Rg8 18.Nd5 ed5 19.Bd5 Qd7 20.Rae1 Kd8 21.Bb6 Kc8 22.Bb7! Qb7 23.Re8 (23...Kd7 24.Rd8 Ke7 25.Re1 Qe4 26.Re4#) 1–0. Wall,Bill – Halo, internet, 2005.

5.b5 Nd7!? =.

5.Ne2 =.

5.c4 dc4 6.Bc4 b5 (6...Nf6 7.Nf3=) 7.Be2 Be4 (7...c6 8.d3=) 8.Nf3 Nf6 9.d3 (9.Nc3 Bb7+=) 9...Bb7 10.Nbd2 (10.0-0 c5 11.a4 cb4 12.ab5 ab5 13.Ra8 Ba8=) 10...c5 11.bc5 Bc5 12.Rc1 (12.a4 Bd6=) 12...Nbd7 13.0-0 0-0 14.Nb3 (14.a4 b4=) 14...Bb6 (14...Bd6 15.Qd2=) 15.Nbd4 (15.a4 ba4 16.Nbd2 Re8=) 15...Rc8 (15...Nc5 16.Qc2=) 16.Rc8 Qc8 17.Qa1 (17.a4 b4=) 17...Qb8 18.Nb3 (18.Rc1 Rc8=) 18...Bc7 (18...Rc8 19.Rc1=+) 19.h3 (19.e4 Rc8=) 19...Rc8=+ 20.Bc3 (20.Rc1 Bd6=+) 20...Bd5 (20...e5 21.e4=+) 21.Rb1 Bb6 22.Ne5 Bb3 23.Nd7 Nd7 24.Rb3 f6 25.d4+= Qc7 26.Qe1 Qc6 27.Bd2 Bd8 28.Rb1 Nb6= 29.Bf3 Qd7 30.Qd1 Kf7 31.Bb4 Nd5 32.e4 Nb4 33.ab4 Bb6 34.d5+= Rd8 35.Ra1 Qd6 36.Qb3 ed5 37.ed5 Rc8 38.Kf1 Bd4=+ 39.Re1 Be5 40.Re4 Rc3 41.Qa2 Kf8 42.g4?? Qc7 43.Kg2=+ Qd6 44.Be2 Rc7 45.Bf3 Re7 46.Re3 Rc7 47.Ra3 Qb4=+ 48.Ra6 Qc4 49.Ra8+= Rc8?? 50.Qc4+- (50...bc4 51.Rc8 Ke7 52.Rc4+-) 1–0. Rehorek,Radomir – Horak,Jiri (2255), Brno CZE–ch blind, 1998.

5.Ne2 c5 6.bc5+= Qa5 (6...Nf6 7.Nd4 Bg6 8.Nb3+=) 7.Nd4+/– Bg6 (7...Ne7 8.Nb3 Qc7 9.d4+/–) 8.Nb3 Qc7 (8...Qa4 9.Nc3 Qc6 10.Na2+/–) 9.Be2 (9.c4 dc4 10.Bc4 Nd7+/–) 9...Nf6 (9...Nd7!?+=) 10.Bf6+/– gf6 11.d4 Nd7 12.0-0 (12.c4!? dc4 13.Bc4+/–) 12...b6+= 13.cb6 Nb6 14.Bd3 e5 (15.Qe2 Qb7+/–; 14...Bd6 15.h3+=). ”Maradona” (1630) – Netto, internet, 2006.

5.Ne2 Nf6!? =.

5.bc5 Bc5 6.Bg7 d4 7.Bh8 de3 (7...Nf6 8.Nf3+-) 8.de3 (better is 8.fe3 Nc6 9.Nf3 Qe7+-) 8...Qh4 (8...Qd1 9.Kd1 Nc6 10.Nd2+-) 9.Nf3 Qe4 (9...Qd8 10.Nc3+-) 10.Bd4 (better is 10.Nc3 Qc2 11.Qc2 Bc2+-) 10...Bd4 11.Nd4 Bg6 (11...Nc6 12.Nd2 Qd5 13.Nf5 Qf5 14.Nc4+-) 12.Nc3 Qe5 13.Qd2 (13.Rb1 Nd7 14.Rb7 Nc5+-) 13...Nf6 (13...Nc6 14.Bb5 Nge7 15.Rd1+-) 14.Bb5 (14.Rb1 b6+-) 14...Kf8 15.0-0 Ng4 (15...a6 16.f4 Qc5 17.Bd3+-) 16.Nf3 Qh5 (16...Qc5 17.Rab1+-) 17.Qd8 (17.Qd4 e5 18.Qc5 Kg7+-) 17...Kg7 18.Qh4 (18.Qe7 Nc6 19.Qb7 Nce5+-) 18...Qf5 (18...Qh4 19.Nh4 Na6 20.Ng6 hg6 21.Ba6 ba6 22.Rab1+-) 19.Nd4 (better is 19.Qe7 Na6 20.h3 Ne3 21.fe3 Qc5 22.Qc5 Nc5+-) 19...Qh5 20.Qh5 Bh5 21.Bd3 (21.Rfb1 b6+-) 21...Nf6 (21...Nd7 22.Rfb1 b6 23.a4+-) 22.f3 (22.Rfb1 b6 23.a4 Nbd7+-) 22...Bg6 23.Bg6 (23.Rab1 b6+-) 23...hg6 24.Ne4 (24.Rab1 e5 25.Ndb5 Nbd7+-) 24...Nd5 (24...Ne4 25.fe4 Nd7 26.Rad1+-) 25.Rfe1 Nd7 26.c4 Ne7 (26...N5f6 27.Nd6 e5 28.Nb3+-) 27.Rab1 b6 28.Red1 Ne5 29.Rdc1 (29.Rbc1 Rh8+-) 29...Rc8 30.c5 Nd3 31.Rc3 Nc5 32.Nc5 bc5 33.Nb3 c4 34.Na5 Nd5 (34...Rc5 35.Nc4 Nd5 36.Rcc1+-) 35.Rc4 Rd8 36.Rd1 (better is 36.e4!? Nb6 37.Rc7 Rd3 38.Ra7 Nc8+-) 36...Rb8 37.Rd3 Rb2 (37...Rb1 38.Kf2+-) 38.e4 (better is 38.Nc6 g5+-) 38...Nf4 39.Rb3 Rg2 40.Kh1 (40.Kf1 Rh2 41.Rc7 Nh3+-) 40...Rf2 (40...Rg5 41.e5! Nh3+-) 41.Rc1 (41.h4 Ra2+-) 41...Ne2 (41...a6 42.h4+-) 42.Rcb1 (42.Rd1!? Nf4+-) 42...Nd4 43.Kg1 (43.Rb7 Nf3 44.R1b2 Rb2 45.Rb2 f5+-) 43...Ra2 (43...Nb3 44.Kf2 (44.Nb3?! Rf3 45.a4 Rc3+-; worse is 44.Rb3 Rc2+-) 44...Na5 45.Rb4+-) 44.Rd3 e5 (44...Ne2 45.Kh1+-) 45.f4! Ne2 (45...ef4 46.Rd4 Deflection) 46.Kh1 Nf4 47.Re3 (47.Rd7 Nh3+-) 47...Kh6 (47...Rc2 48.Nb7+-) 48.Nc6 f6 49.Na7 Kh5 (49...g5 50.Nb5 g4 51.Reb3+-) 50.Nb5 Kh4 51.Rg3 g5 52.Rbb3 (52.Rgb3 Rc2+-) 52...g4 (52...Kh5 53.Nc3 Rd2 54.a4+-) 53.Rg1 Nh3 54.Rf1 Nf2 55.Rf2! Rf2 56.Kg1 Ra2 57.Nc3 Rc2 58.a4 Rc1 59.Kf2 Rc2 60.Ne2 Ra2 61.Rb4 Kh3 62.Rb3 Kh2 63.Rg3 Re2= 64.Ke2 Kg3 65.a5 Kh2 66.a6 g3 67.a7 g2 68.a8Q g1Q 69.Qh8 Kg2 ½–½. Liiv,Kristiina – Fecker,Noah, Mureck AUT, 2014.

5.bc5!? Nd7 6.d4 +=.

5.bc5 f6 6.d4 Ne7 7.Bd3 b6 8.Bf5 Nf5 9.Ne2 bc5 10.dc5 Bc5 11.0-0 0-0 12.Nd4 Nd4 13.Bd4 Bd6 14.Nc3 e5 (14...Nc6=+) 15.Nd5 (better 15.Bb6! Qb6 16.Qd5 Kh8 17.Rfd1=+) 15...ed4-/+ 16.Qd4 Nc6 17.Qd1 f5 18.Qf3 Qh4 19.g3 (better 19.Nf4 Bf4 20.ef4-+) 19...Qg5?? (19...Ne5!? 20.Qd1 Qh6 21.Qe2-+) 20.Rfd1? (better 20.Nf4 Ne5 21.Qd5 Nf7 22.Ne6=) 20...Ne5 21.Qe2 Rfd8 (21...Qh6 22.a4-+) 22.Nf4 (better 22.f4 Qg4 23.Qg4 Ng4 24.h3-/+) 22...h5?? (better 22...Qe7-+) 23.Ne6= Qg4 24.Nd8?? (better 24.Qg4 fg4 25.Nd8 Rd8 26.Rab1+=) 24...Qe2-+ (24...Rd8 25.Qg4 hg4 26.Rab1+=) 25.Rd6 Nf3 26.Kg2 Ne1 (better 26...Ng5 27.Rd7 Qf3 28.Kf1-+) 27.Re1 (27.Kg1 h4 28.Re1 Qe1 29.Kg2 h3 30.Kh3 Qf1 31.Kh4 Qf2-+) 27...Qe1 28.Rd5 (28.Ne6 Qc3 29.Nd4 Qa3 30.Nf5 Qc5-+) 28...g6 (better 28...Qc3 29.Kh3-+) 29.Ne6 Qc3 30.Nf4 Qc6 31.e4 (31.h4 Rb8 32.c4 Qc4-+) 31...Qc2 (31...fe4 32.c4-+) 32.Ng6 (32.ef5 g5 33.Nh5 Qe4 34.Kh3 Qf3-+) 32...Qe4 33.f3 Qd5 (better 33...Qe2 34.Kh3 Qf3-+) 34.Ne7 Kf7 35.Nd5 Rd8 36.Ne3 (36.Nf4 Rd2 37.Kg1 h4-+) 36...Rd3 (better 36...Ke6!? 37.Kh3 Rd3-+) 37.Nf5-/+ Kf6 38.g4 hg4 39.fg4 Kg5 40.h3 Ra3 41.Ne3?? (better 41.Ng7-+) 41...Re3 42.Kh2 (42.h4 Kg4 43.Kf2-+) 42...a5 43.Kg2 a4 44.Kf2 (44.h4 Kg4 45.Kf2 Rf3 46.Kg2 a3 47.h5 a2 48.h6 a1Q 49.h7 Qf1 50.Kh2 Rf2) 44...Rc3 (44...Kf4 45.Kg2 a3 46.Kf2 a2 47.h4 a1Q 48.g5 Qe1 49.Kg2 Qd2 50.Kf1 Re1) 45.Ke2 a3 46.Kd2 Rh3 (46...Rc8 47.Ke3 a2 48.h4 Kg4 49.Kd3 a1Q 50.Kd2 Qd4 51.Ke1 Rc2 52.h5 Qa1) 47.Kc2 Rh2 48.Kb1 a2 (better 48...Rb2 49.Ka1 Rb5 50.Ka2 Ra5 51.Kb1 a2 52.Kc2 a1Q 53.Kd3 Qc1 54.Kd4 Qc5 55.Ke4 Qc4 56.Kf3 Qd3 57.Kf2 Ra2 58.Ke1 Qe2) 49.Ka1 Rh1 50.Ka2 Kg4 51.Kb3 Kf3 52.Kc4 Ke4 53.Kc3 Rd1 54.Kc4 Rd4 55.Kc3 Ke3 56.Kb3 (56.Kc2 Rd3 57.Kb1 Kd2 58.Kb2 Rf3 59.Kb1 Kc3 60.Ka2 Rf1 61.Ka3 Ra1) 56...Kd3 57.Kb2 Rc4 (57...Rb4 58.Ka3 Kc3 59.Ka2 Ra4 60.Kb1 Ra5 61.Kc1 Ra1) 58.Kb3 Rc3 (58...Rg4 59.Kb2 Rb4 60.Ka3 Kc3 61.Ka2 Ra4 62.Kb1 Ra5 63.Kc1 Ra1) 59.Kb4-+ Kd4 60.Kb5 Rc5 61.Kb4 Kd5 62.Kb3 Rc4 63.Kb2 (63.Ka3 Kc5 64.Kb3 Kb5 65.Ka3 Rb4 66.Ka2 Ka4 67.Ka1 Kb3 68.Kb1 Rc4 69.Ka1 Rc1) 63...Kc5 (63...Kd4 64.Kb3 Kd3 65.Kb2 Rb4 66.Ka3 Kc3 67.Ka2 Ra4 68.Kb1 Ra5 69.Kc1 Ra1) 64.Kb1 (64.Kb3 Kb5 65.Ka3 Rb4 66.Ka2 Ka4 67.Ka1 Kb3 68.Kb1 Rc4 69.Ka1 Rc1) 64...Kb4 65.Kb2 Rc3 (65...Rc5 66.Ka2 Kc3 67.Kb1 Kb3 68.Ka1 Rc1) 66.Ka2 Rb3 67.Ka1 Kc3 68.Ka2 Kc2 69.Ka1 Ra3 0-1. SAIRAM – realsid, Rated Classical game, lichess.org, 2013. (=1.e3 d5 2.a3 Bf5 3.b4 e6 4.Bb2)

5.h3 f6 6.Nf3 h6 (6...Nh6 7.bc5 Bc5 8.Bb5 Nc6 9.Nd4 Bd4 10.Bd4=+) 7.Bb5 (7.Nh4 Bh7+=) 7...Nd7 (7...Kf7 8.Nh4+=) 8.bc5 (8.Nh4 Bh7+=) 8...a6 9.Ba4 (9.Bd7 Qd7 10.Nh4 Bh7+=) 9...Bc5= 10.Nc3 (10.Nh4 Ne7=) 10...Ne7 11.0-0 (11.Nh4 0-0=) 11...Nc6 (11...b5!? 12.Bb3 0-0=) 12.d4 (12.Nh4 Bh7+=) 12...Ba7 (12...Bd6+=) 13.Nd2 (better is 13.Nh4!? Bh7 14.Qh5 Ke7 15.Ng6 Bg6 16.Qg6+=) 13...b5= 14.Bb3 0-0 (14...Qc7 15.Ne2=) 15.Ne2 (15.Nd5 Nc5 16.dc5 ed5+/–) 15...Bh7 (better is 15...Na5=) 16.Nf4+/– Re8 17.Re1 (17.Nd5!? Na5 18.Nb4+/–) 17...Rc8 (17...Nb6=) 18.e4 (better is 18.Ne6!? Re6 19.Bd5+=) 18...Nd4-/+ (< 18...Bd4 19.c3 Bc5 20.ed5 ed5 21.Bd5 Kh8 22.Ne6=) 19.ed5 Nb3 (19...Bc2 20.Bc2 Nc2 21.Ne6-/+) 20.Nb3 (20.cb3!? Nc5 21.de6=+) 20...e5 21.Ne6 Qb6 (21...Qe7 22.c3 Nb6 23.a4 Na4 24.Ra2-+) 22.Re2 Bf5 23.Bd4? (23.Rd2 Be6 24.de6 Nc5 25.Nc5 Qc5-/+ (25...Rc5 26.Rd6 Rc6 27.Rc6 Qc6 28.Qd7 Qd7 29.ed7=+)) 23...Qb7 (better is 23...ed4 24.Nbd4 Be6 25.Ne6 Nc5-+) 24.Ba7-/+ Qa7 25.Rc1 (25.Rd2 Nb6-/+) 25...Be6 26.de6 Re6 27.Qd5 Rcc6 28.Rd1 Nb6 29.Qd8 Kh7 (29...Kf7 30.Red2 Qa8 31.Qa8 Na8 32.h4-/+) 30.Nc5?? Rc5-+ 0–1. thedesertfox (1900) – bienopia (2125), net–chess.com, 2004.

5.h3 Nf6 6.Bb5 Nc6 7.Nf3 =+.

5.c4 c6?? 6.Nf3 Ne7 7.Be2 0-0 8.0-0 Bc7 9.c5 Ng6 10.d4 Qf6 11.Nbd2 Ne7 12.Rc1 Qg6 13.Rc3 Bh3 14.Ne1 Nf5?? 15.a4?? e5? 16.Bh5 Qg5 17.Qf3 Nh4+= 18.Qh3 Qh5 19.Nef3 Nf3=+ 20.Qf3 Qh6 21.h3 Qe6 22.Qh5 Nd7 23.Nf3 h6 24.Rc2 Bb8 25.Ne5+/– f6 26.Nd7 Qd7 27.Qg4 f5 28.Qh4 Qc7 29.g3+/– Kh7 30.f4 Qf7+= 31.Rcf2 (31.Rg2 a5 32.b5 Qe8=) ½–½. Piorun,Zaneta – Dabrowska,Kamila, Poland–ch U10 Girls, 2001.

5.c4 c6?? 6.Bg7 Be5 7.Be5 +-.

5.c4 Nf6 6.c5 Be7 7.Nf3 =+.

5.d4 Ne7 6.c4 c6 7.Nf3 0-0 8.Nc3 Nd7 9.Bd3 Bd3 10.Qd3 Nf5 (10...Ng6 11.0-0=+) 11.c5 (11.cd5!? cd5 12.Nd5=) 11...Bc7=+ 12.b5 cb5 (12...Nh4 13.Nh4 Qh4 14.bc6 bc6 15.Qa6=) 13.Qb5 Rb8 14.Rb1 a6 15.Qd3 Qc8 (15...Nh4!? 16.Nh4 Qh4=+) 16.0-0 b6 17.cb6 (17.Nd5!? bc5 18.Nc7 Qc7 19.Qa6 cd4 20.Nd4 Nd4 21.Bd4 (21.ed4? Qc2-+) 21...Rb1 22.Rb1+=) 17...Nb6= (< 17...Bb6 18.Nd5 ed5 19.Qf5+/–) 18.Bc1 Nc4 19.Nd2 Nfd6 20.Rb8 Qb8 21.Nc4 Nc4 22.Bd2? (22.e4 Bh2 23.Kh1 Bc7-/+) 22...Ba5?? (better is 22...Bh2!? 23.Kh1 Bd6-+) 23.Rb1 Qc7 24.Na4?? (better is 24.Bc1=+) 24...Bd2 25.Rd1 Ba5 26.Rc1 Qd7 27.Nc5 Qc8 28.g3 Bb6 29.Na4 Ba7 30.Nb2 (30.e4 Qc6 31.ed5 ed5-+ (< 31...Qa4 32.Rc4 Qb5 33.d6-+)) 30...h6 (better is 30...Nb2 31.Rc8 Nd3-+ (31...Rc8? 32.Qa6 Rc1 33.Kg2+-)) 31.Nc4 dc4 (better is 31...Qc6!? 32.Qe2-+) 32.Rc4 Qd7 33.Rc1 Qb5 34.Qe4 (34.Qb5 ab5 35.f4 Rb8-+) 34...Rb8 (34...Qb2!? 35.Qb1 Qa3 36.Qa1-+) 35.Kg2 Qb2 (35...Bb6 36.Qe5 Bd8 37.Qd6-+) 36.Rc2 (better is 36.Rc7!? Qb6 37.Qc2-/+) 36...Qa3 37.Rc7 Qd6?? (better is 37...Bb6 38.Rf7 Kf7 39.Qf4 Ke7 40.Qb8 Qd6-+) 38.Ra7+= Qb6 39.Rd7 a5 40.Qf4 f6 (40...Rf8 41.Qf3=) 41.Rd6 Qb7 42.Kh3 (42.e4 Re8+=) 42...a4 (42...Qh1 43.Re6 Qf1 44.Kg4 h5 45.Kf5 Qb1 46.e4=) 43.Re6 (better is 43.Qg4=) 43...Qd7?? (better is 43...Ra8 44.Qf5 a3=+) 44.Qf5 (better is 44.Qb8 Kf7 45.d5+-) 44...Qc7?? (better is 44...a3 45.Rf6 Qf5 46.Rf5 Ra8-+) 45.Qd5 Qb7?? (better is 45...Kh8+/–) 46.Re8+- Kh7 47.Qg8 Kg6 48.g4 (better is 48.Rb8 Qd7 49.Kg2+-) 48...Re8 (49.Qe8 Kh7=+; 48...Qf3 49.Kh4 Qg2 50.Qg7 Kg7 51.Re7 Kg6 52.Rg7 Kg7 53.h3 Qf2 54.Kh5 Rb5 55.d5 Rd5 56.g5 Rg5) 0–1. slavisa10 – Schnick, Live Game Caissa's Web, 2004.

5.Bg7 Be5 6.Be5 f6 +-.

5.d3 Ngf6 6.Nd2 h6 (6...a5 7.b5=+) 7.Ngf3= Bh7 8.Be2 c6 9.0-0 Bd6 10.c4 e5 11.cd5 cd5 12.d4 e4 13.Ne5 0-0 14.Qb3 Re8 15.Nd7 Qd7 16.h3 Bf5 17.Rfc1 Bh3 18.gh3 Qh3 19.Nf1 Ng4 20.Bg4 Qg4 21.Ng3 Bg3 22.fg3 Qg3 23.Kf1 Re6 24.Qd5 Rf6 25.Ke2 (25.Qf5 Rf5 26.Ke2 Rf2 27.Kd1 Qg1) 25...Qg2 26.Kd1 (26.Ke1 Rf1) 26…Rf1 0-1. Cofi7 (2440) - opperwezen (2515), lichess.org, 2017.

5.d4 Ngf6 6.c4 c6 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.d4).

5.Be2 c5 6.g4 (6.Nf3 cb4 7.Nd4 ba3 8.Na3 Nc6 9.Nf5 ef5=) 6...Bg6 7.h4 (7.bc5 Bc5 8.Nh3 e5=+) 7...h6 (7...cb4 8.h5 Bf7 9.f4=+) 8.Nh3 (8.h5 Be4 9.f3 Bh7=) 8...Bh7 (8...cb4!? 9.Nf4 Bf7=+) 9.Nf4 g5?? (better 9...Qd7=) 10.Ne6+- Qe7 11.Nf8 Qf8 12.hg5 (12.Nc3 Nc6+-) 12...hg5 13.Bd3 Qg7 14.bc5 Ne7? (better 14...Bd3!? 15.Rh8 Qh8 16.cd3 Qh1 17.Ke2 Qg2+-) 15.Bh7 (15.Bb5 Nbc6+-) 15...Rh7 16.Rg1 (16.Rh7 Qh7 17.Bf6 Qh1 18.Ke2 Qg2 19.Be7 Ke7+-) 16...Rh2 17.Qf3 (better 17.Nc3 Nbc6 18.Nb5+-) 17...Qh6? (better 17...Nd7+-) 18.Bf6 (worse 18.Qf6 Qh4+-) 18...Ng6 (18...Nd7 19.Be7 Ke7 20.Nc3+-) 19.Nc3 (better 19.Qd5 Qf8 20.Qe6 Ne7 21.Nc3+-) 19...Ne5?? (19...Nh4 20.Qg3 Qf6+-) 20.Be5 Nd7 (20...Rh3 21.Qd5 Nc6 22.Ne4+-) 21.Bh2 Qh2 22.Rh1 Qc7 23.Rh8 Nf8 24.Qf8 Kd7 25.Qf7 Kc6 26.Rh6 (26.Qd5) 26...Kc5 (26...Qd6 27.Rd6 Kc5 28.Qd5) 27.Qc7 (27.Qd5?!=) 1–0. FeegLood (2735) – Gigilka (1640), lichess.org, 2015.

5.h3 (5.Nf3 e5=) 5...a6 (5...a5 6.b5=+) 6.c4 (6.Nf3 e5=) 6...c6 (6...a5 7.b5=) 7.c5 (7.Nc3 Bd6=) 7...b6 (7...a5 8.Nf3=) 8.cb6 Qb6 9.Nf3 h6 (better is 9...a5!? 10.Qa4 Bd6=) 10.Nd4 Ne7 11.Nf5 Nf5 12.Nc3 (12.Qh5 Ke7 13.Bd3+/–) 12...c5 (12...a5 13.b5+=) 13.Qa4 (better is 13.Qh5!? Kd8 14.Nd5 ed5 15.Qf5+-) 13...Nd7 14.Bb5 Bd6?? 15.Bd7+- Kf7 16.Nd5! Qd8 17.Nf4 Bf4 18.ef4 Ra7 19.Bc6 cb4 20.ab4 Qd3 21.Bb5! Qe4 22.Be2 Qg2 23.Rf1 Rd8 24.b5 a5 25.b6 Rad7 26.Rd1 Qh3 27.Qa5 Qb3 28.Bc3 Rb7 29.Bb4?? Rbd7? 30.Rb1?? Qb1-+ 31.Bd1 Qe4 32.Be2 Nd4 (33.Qh5 g6 34.Qg4 Nc2 (34...Qe2?! 35.Qe2 Ne2 36.Ke2-+) 35.Kd1 Nb4 36.Qe6 Qe6 37.d4 Rd4 38.Kc1 Rc8 39.Bc4 Qc4 40.Kb2 Qa2) 0–1. thedesertfox (1920) – bienopia (2125), net–chess.com, 2004.

5.Bb5 A) 5...Nbd7 6.Nf3 Bd6 7.0-0 (7.Nh4 Bg4 8.Be2 Be2 9.Qe2 a5 10.b5 Nb6 11.Qf3+=; 7.Nd4 Bg6 8.f4 a5 9.ba5 0-0 10.0-0 Bh5 11.Be2+=) 7...0-0 8.Nd4 Bg6 9.Be2 a5 10.ba5 Ra5 11.f4+=; B) 5...c6 6.Be2 B1) 6...a5 7.b5 Be4 (7...Bd6 8.Nf3 Bg4 9.Nc3 0-0 10.0-0 Nbd7 11.h3=) 8.f3 B11) 8...Bg6 9.f4 Be4 (9...Bc5 10.Nf3 0-0 11.Nc3=) 10.Nf3 Bf3= –0.19 11.gf3=; B12) 8...Bf5 9.g4 Bg6 10.Nh3 Nfd7 11.Nf2=; B2) 6...b5 7.Nf3 a5 8.a4 Bb4 9.ab5 Bg4 10.Nd4 Be2= 11.Qe2=; B3) 6...Bd6 7.Nf3 Bg4 (7...a5 8.b5 Bg4 9.Nc3 0-0 10.0-0 Nbd7 11.h3=) 8.Nc3 0-0 9.0-0 b5 (9...Bf3 10.Bf3 b5+= 11.Ne2+=) 10.a4 Bf3 11.Bf3+=.

5.c4 a5 6.cd5 ab4 7.Bb5 c6 8.dc6 bc6 9.Be2 -/+.

5.c4 c5 6.cd5= ed5 (6...Qd5 7.Bf6 gf6 8.Nc3=) 7.Bb5 (7.bc5 Bc5 8.Qb3 0-0=) 7...Nc6 8.Ne2 (8.bc5 Bc5 9.Nf3 Rc8=) 8...cb4=+ 9.ab4 Bb4 10.Nd4 (10.Qa4 Qd6 11.Bf6 gf6= (< 11...Qf6 12.Nd4 Bb1 13.Rb1+=)) 10...Bd7=+ 11.Qa4 Nd4 (11...Qb6 12.Nf3=+) 12.Bd4 Be7 13.Nc3 Bb5 (better is 13...a6!?=+) 14.Qb5+= Qd7 15.Ra7 (15.Rb1 Qb5 16.Rb5 0-0-0+=) 15...Ra7 16.Ba7 Qb5 17.Nb5 0-0 (17...Kd7 18.Ke2=) 18.0-0 (18.Bd4 Ra8 19.Ke2 Ne4+/–) 18...Rc8 19.Nd4 (better is 19.Nc3=) 19...Bc5?? (better is 19...Ra8 20.Bb6 Nd7=+) 20.Rc1+/– Nd7 (20...b6 21.Bb6! Nd7 22.Bc5 Rc5 23.Ra1+/–) 21.Nb3 b6 22.d4 (22.Bb6 Nb6 23.Nc5 Ra8+/–) 22...Ra8 23.Nc5 (23...bc5 24.Bc5+/–; 23.dc5 Ra7 24.c6 Nc5+-) 1–0. pteros (1860) – Daniel999 (1730), ICC, 2003.

5.c4 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.c4 Nbd7 6.Nf3 c6 7.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.c5).

5.c4 Be7 6.d4 0-0 7.Nf3 Nbd7 8.c5 c6 9.Bd3 Bd3 10.Qd3 Ne4 11.Nc3 f5 12.0-0 g5 13.Nd2 g4 14.f3 Nd2 15.Qd2 gf3 16.Rf3 Kh8 17.Ne2 Nf6 18.Nc3 Nh5 (18...Nd7 19.Raf1+=) 19.Raf1 Qe8 20.a4 Qg6 21.b5 Rg8 22.a5 Rg7 23.R1f2 Rag8 24.bc6 bc6 25.Ne2 Bh4 26.Ng3?? (better is 26.g3=) 26...Bg3-+ 27.hg3 Ng3 28.Bc3 Qh5 29.Rg3 Rg3 30.Qe2 (30.Rf1-+) 30...Qh4 (better is 30...Rg2! 31.Rg2 Qe2 32.Rg8 Kg8-+) 31.Be1 Rh3 (31...Rh3 32.g4 Rh1 33.Kg2 Qh3#) 0–1. Loulou – Pkchess, playchess.de, 2004.

5.c4 Be7 6.cd5 Bb1 (6...Nd5 7.Bg7 Rg8=) 7.Rb1 Qd5 8.Nf3 0-0 (8...a5 9.Rc1 ab4 10.ab4+=) 9.Be2 (9.Qc2 Nbd7+=) 9...c6 (9...a5 10.b5+=) 10.0-0 Nbd7 11.Qc2 Rfd8 12.Qc4 (12.d3 Qd6+=) 12...Nf8 (12...Qc4 13.Bc4 Ne4 14.Rfc1=) 13.Bf6 (13.Bd4 Qc4 14.Bc4 Ng6+=) 13...Bf6= 14.d4 Qc4 15.Bc4 Ng6 16.Rfc1 Kf8 (16...e5 17.b5 Rab8 18.bc6 bc6 19.Rb8 Rb8 20.g3+=) 17.Be2 (17.Bd3 a6+=) 17...Rac8 18.Rc2 (18.Bd3 Nh4+=) 18...a6 (18...e5 19.de5 Ne5 20.Nd4=) 19.Rbc1 (19.Rc5 Ne7+=) 19...Be7 (19...e5 20.de5 Ne5 21.Nd4=) 20.g3+= Ra8 21.Ra2 Bd6 22.Kg2 a5 23.b5 cb5 24.Bb5 Rac8 25.Rb1 Rc3 The isolani on a3 becomes a target 26.a4 (26.Be2 Rb8 27.Rb5 b6+=) 26...Bb4 27.Ng5 (27.Rd1 Ne7+=) 27...h6 28.Ne4 (28.Nf3 Ne7=) 28...Rc7= 29.Nd2 (29.h4 Ne7=) 29...Ne7 30.Nf3 Nd5 31.Rab2 (31.Bd3 Rdc8 32.Rf1 g6=) 31...f6 (31...Nc3 32.Ra1=+) 32.Ng1 (better 32.Bd3!?=) 32...Nc3-/+ 33.Rf1 (33.Ra1 Nb5 34.ab5 Rd5-/+) 33...Rdc8 (33...Nb5 34.ab5 Rc4 35.Rfb1-/+) 34.Ne2 Nd5 (34...Nb5!? 35.ab5 g5-/+) 35.Nf4 Ke7 36.Nd3 (36.Nd5 ed5 37.g4 Rc2 38.Rc2 Rc2=) 36...Rc2 37.Rc2 Rc2 38.Rc1? (better 38.Kf3=+) 38...Ne3-+ 39.Kf3 (39.Kg1 Bd2 40.Rb1 Nf5-+) 39...Rc1 (better 39...Nf5!? 40.Rc2 Nd4 41.Ke4 Nc2 42.Nb4 f5 43.Kd3 Nb4 44.Kc4 Nd5-+) 40.Nc1-/+ Nf5 (40...Nd5 41.Bc4-/+) 41.Nb3 Kd6 42.Ke4 b6 (42...Ne7 43.Kd3-/+) 43.Nc1 (43.d5 Ne7 44.de6 f5 45.Kd3 Ke6 46.Nd4 Kd5-/+) 43...Ba3 (43...g5 44.Nb3-/+) 44.Nb3 Bb2 (44...Kc7 45.Be2-/+) 45.Be8 Ne7 46.Bb5 (46.Nd2 Nd5-/+) 46...Nd5 47.Kd3 Ba3 (47...Bc3 48.Bc4 Bb4 49.Nd2-/+) 48.Be8 (48.Nd2 Bb4-/+) 48...Bb4 49.Kc4 (49.Na1 Be1 50.Ke2 Ke7-/+) 49...Nc3 (better 49...Be1 50.f4 f5-/+) 50.Bb5? (better 50.Nc1!?-/+) 50...Nd1-+ 51.f3?? (51.Nc1 Nf2 52.Nd3-+) 51…Nb2 0–1. Fora,Jean_Paul – Orlovic,Isa (1865), 4th Muret France, 2015.

5.c4 Be7 6.Nf3 0-0 7.Nd4 Bg6 8.c5 a5 9.Qa4 Nbd7 10.c6 Nb6?? (10...ab4 11.Qd1 ba3 12.cb7 Rb8 13.Ba3 Bh5+=) 11.Qb5+= bc6 12.Nc6 Qd7 13.ba5 (13.Na5!? Rfc8 14.Qd7 Nfd7 15.Nc6+/–) 13...Nc8= 14.Be5 Nd6 15.Bd6 Bd6 16.Be2 Ng4 (16...e5 17.0-0=) 17.d4 (17.Bg4 Rab8 18.Qd5 Rb1 (18...ed5? 19.Bd7 Rb1 20.Rb1 Bb1 21.Ke2+-) 19.Rb1 Bb1+/– (19...ed5? 20.Bd7 Bb1 21.Ke2+-)) 17...e5 (17...f5 18.Nd2=) 18.h3 (worse is 18.Qd5 ed4 19.ed4 Nf6=) 18...Nh6? (18...Nf2 19.Kf2 Qf5 20.Ke1 ed4 21.Nd4 Qg5=) 19.de5+- (19.Ne5?! Qb5 20.Bb5 Be5 21.de5 Ra5+/–; 19.Qd5?! ed4 20.ed4 Nf5+=) 19...Bb1? (19...Rab8 20.Qd5 Rb1 21.Rb1 Bb1 22.ed6 cd6+-) 20.ed6 (20.Qb1?! Qc6 21.ed6 Qc3 22.Kd1 cd6=; 20.Rb1 Ba3 21.Rb3 Be7+-) 20...Bg6 (20...Bf5 21.Ne7 Kh8 22.Qd7 Bd7 23.dc7 Ra5+-) 21.Ne7 (21.Ne7 Qe7 22.de7+-) 1–0. Borawski,Jakub (1800) – Bartoszek,Marcin (1830), EMJun.–C13 Augustow Poland, 2007. (=1.a3 d5 2.b4 Bf5 3.Bb2 e6 4.e3 Nf6)

5.c4 h6 6.Nc3 Be7 7.Nf3 Bh7 (7...0-0 8.cd5 ed5 9.Be2=) 8.Qb3 c6 9.Rc1 (9.Be2 0-0=) 9...Nbd7 10.Be2 a6 11.0-0 b5 (11...0-0!?=) 12.cd5+= cd5 13.d3 0-0 14.Rc2 Qb6 15.Rfc1 a5 (15...Qb7 16.Nb1 Rac8 17.Nbd2=) 16.ba5 (16.Nd4!? a4 17.Qa2+/-) 16...Ra5= 17.Nd4?? (better 17.Na2 Nc5 18.Qb4=) 17...Nc5-+ 18.Qb4 Re8?? (better 18...Nd3 19.Qe7 Ra7 20.Nd5 ed5-+) 19.Nb3?? (better 19.Nc6! Qc6 20.Qa5+/-) 19...Nb3=+ 20.Qb3 Bg6 (better 20...Nd7 21.Nb1 Nc5=+) 21.Na2+= Kh7 22.Nb4 Ra4 23.Rc6 (23.Rc7 Bd6 24.R7c6 Qb8+/-) 23...Qb8 (23...Qa5 24.Nc2+=) 24.Rc7 (better 24.Bd1!?+/-) 24...Bd6= 25.R7c6 Bf8 (25...Be7 26.Bd1+/-) 26.Bf6 (26.Bd1 Be7+/-) 26...gf6+= 27.Rc7 (27.d4!?+=) 27...Bd6= 28.R7c6 Bh2 29.Kh1 Bd6 30.R6c2? (30.Qb2 Ra5=) 30...Bf8 (30...Qa7!? 31.Nc6 Rh4 32.Kg1-+) 31.Rc7 (31.Rc3 Qa7 32.Nc2 Ra8 33.Qb5 Rb8-/+) 31...Qa8-/+ 32.R1c3 (32.R7c3 Qa5 33.Nc2 Kg7-/+) 32...Bd6 (32...Qa5 33.R7c6 Bb4 34.ab4 Rb4 35.Qd1-+) 33.R7c6-/+ Bf8 34.Bf3 (34.Rc7 Qa5-/+) 34...Qa5 (better 34...Bb4!? 35.ab4 Bd3-+) 35.Ra6= Rb4 (better 35...Qd8!? 36.Ra4 ba4 37.Qa4 Qa8=+) 36.Ra5+/- Rb3 37.Rb3 Rc8 38.g3 Rc2 39.Kg2 Bc5? (better 39...Rd2 40.Ra8 Kg7 41.Rb5 Bd3+/-) 40.d4+- Bd6 41.Rab5 h5 (41...Ra2 42.Rb7 Bf8 43.Ra7+-) 42.Rb6 (42.Rb6 Bf8 43.Rb8+-) 1-0. pacalmisu (2250) - chessBS_at_Twitch (2240), Rated Blitz game, lichess.org, 2015.

5.d3 c5 6.e4 de4-/+ 7.bc5 ed3 8.cd3 (8.Bd3 Bd3 9.Qd3 Qd3 10.cd3 Bc5-/+) 8...Bc5-+ 9.d4 Qa5?? (better 9...Bd6-+) 10.Bc3+/- Qb6 11.dc5 Qc5 12.Bf6 gf6 13.Nd2 Bc2? (13...Nc6 14.Ngf3+/-) 14.Qc1 (14.Rc1!? Bd1 15.Rc5 Nd7+-) 14...Qe5 (14...Nd7 15.Qb2 Qe5 16.Qe5 fe5 17.Rc1+-) 15.Be2 Bd3 (15...Nd7 16.Nc4 (16.Qc2 Qa1 17.Nb1 0-0=+) 16...Qc3 17.Kf1+-) 16.f3 (better 16.f4 Qd4 17.Bd3 Qd3 18.Qc8 Qd8 19.Qb7+-) 16...Nc6+/- 17.f4! Qe3 (17...Qf4 18.Bd3 Combination) 18.Nc4 Bc4?? (better 18...Qd4+-) 19.Qe3 (19.Qe3 Be2 20.Qe2+-; 19.Qc4?! Rc8+/-) 1-0. SAIRAM – gsmaldone, Rated Classical game, lichess.org, 2013. (=1.e3 d5 2.a3 Bf5 3.b4 e6 4.Bb2)

5.Bd3 Bd3 6.cd3 Be7 7.Nf3 0-0 8.0-0 c5 9.bc5 Bc5 10.Nc3 Nc6 11.Qc2 a6 12.d4 Bd6 13.Rfc1 Rc8 14.h3 Na5 15.Ng5 Qb6 16.Rab1 Nc4 17.d3 Na5 18.Qa4 Nc6 19.Nf3 Qa7 20.Rc2 Nd7 21.Rbc1 b5 22.Qb3 Na5 23.Qa2 Rc7 24.a4?? (better is 24.e4 Bf4 25.Rd1+=) 24...b4-+ 25.Nd5 (25.Nb5 ab5 26.Rc7 Bc7 27.ab5-+) 25...Rc2 (25...ed5?! 26.Rc7 Bc7 27.Qd5-/+) 26.Rc2 b3 (26...ed5?! 27.Qd5 b3 28.Rc1-/+) 27.Qa1 bc2 28.Nc3 Nb3 29.Qe1 Bb4 30.Ng5 Nf6 31.Nge4 Ne4 32.de4 Qd7 33.f4 Rc8 34.f5 Bc3 35.fe6 Qe6 (35...Qe6 36.Bc3 c1Q 37.Qc1 Nc1-+) 0–1. Yannick – MimiSiku, playchess.de, 2005.

5.d4 a5 A) 6.b5 Be7 (6...Bd6 7.c4 0-0 8.Nf3 Ne4 9.c5 Be7 10.Bd3 b6=; 6...Ne4 7.Nf3 Bd6 8.c4 Qf6 9.Nc3 0-0 10.Rc1 Nc3=) 7.Nf3 c6 8.Ne5 Nfd7 9.Nd7 Qd7 10.a4 0-0+=; B) 6.ba5 Ra5 7.Nf3 Be7 8.Be2 0-0 9.Nbd2 Nc6 10.Nh4 Be4+=.

5.d4 Bd6 6.Nd2 0-0 7.c4 c6 8.c5 Bc7 9.Qb3 Re8 10.f4 Ne4 11.Ngf3 f6 (11...Nd2 12.Nd2 Nd7 13.Nf3=+) 12.Bd3 Nd2 13.Nd2 Nd7 14.0-0 Qe7 15.e4 Be4 (15...de4 16.Ne4 Qf7 17.Rae1=) 16.Be4 (16.Ne4!? de4 17.Be4+/-) 16...de4= 17.Ne4 f5 18.Ng3 Qf7 19.Rae1 Attacks the backward pawn on e6 19...Nf6 20.Qf3 Nd5 21.Ne2 a5 22.Qb3 ab4 23.ab4 Qd7 24.g3 b5 25.cb6 Bb6 26.Ra1 Nc7 27.Rfc1 Nb5 The pressure on the isolated pawn grows 28.Qc4 Ra1 29.Ba1 Rc8 30.Bb2 Kf7 31.Kf1 Rc7 32.Ke1 h5 (32...Nd6 33.Qa6 Ba7 34.Kf1=+) 33.h4 (33.Kf2 Qd5=) 33...Nd6 34.Qa6 Ba7 35.d5 (35.Ng1 Nb5 36.Nf3 Kg8= (36...Bd4 37.Bd4 Qd5 38.Ne5 Kg8 39.Qa8 Kh7 40.Be3+-)) 35...ed5 (35...cd5 36.Rc7 Qc7 37.Be5=+) 36.Be5=+ The backward pawn on c6 becomes a target 36...Nc4 (36...Be3!? 37.Rc2 Ra7=+) 37.Rc4+= dc4 38.Qc4 Kf8 (38...Ke7 39.Qg8 Rb7 40.Qg7 Ke6 41.Qg6 Kd5 42.Qh5 Rb4 43.Nc3 Kc5 44.Qh8=) 39.Bc7+/- Qc7 40.Qe6 Qe7 41.Qc8 Qe8 42.Qf5 Kg8 43.Qd3 Qe6 (43...Qe7 44.Qc4 Kf8 45.f5+/-) 44.f5 Qa2 45.Qc3 (better 45.Kf1!?+/-) 45...Qb1+= 46.Kd2 Qe4 (46...Bf2 47.Qc4 (47.Qc6? Qe1 48.Kd3 Qd1 49.Kc3 Be1 50.Kb2 Qe2 51.Ka3 Bg3-+) 47...Kh7 48.Qe6 (48.Qc6? Qe1 49.Kc2 Qe2 50.Kc1 Be3 51.Kb1 Qf1 52.Kb2 Qf5-+) 48...Qb2 49.Kd1 Qb1 50.Nc1 Qb4 51.Ne2= (worse 51.Qc6 Qd4 52.Kc2 Qg4-/+)) 47.Qa3 Bb6 48.Qc3 Qd5 (48...Ba7 49.Qb3 Kf8 50.Qa3 Qd5 51.Qd3 Qa2 52.Kc1 Qa1 53.Kc2 Qa2 54.Kd1 Qa1 55.Nc1 Qa4 56.Qb3+=) 49.Kc1 (49.Qd3 Qa2 50.Qc2 Qd5 51.Kc3 Bf2+/-) 49...c5 (49...Qe4!? 50.Qb3 Kf8=) 50.bc5 (50.Nf4!? Qf5 51.Qc4 Qf7 52.Qa6+/-) 50...Bc5+= 51.Qc2 Be3 52.Kb1 Qb5 53.Ka2 Qa5 54.Kb2 Qb5 55.Qb3 Qb3 56.Kb3 Kf7 57.Kc4 Kf6 58.Kd3 Bf2 59.Ke4 g6 60.Kf3 Be1 61.fg6 Kg6 62.Nf4 Kh6 63.Ng2 Bc3 64.Ke4 (64.Kf2 Bd4 65.Ke2 Be5+-) 64...Bf6 65.Kf5 Bc3 66.Nf4 (66.g4 hg4 67.Kg4 Bf6+/-) 66...Be1 67.Ne2 Bd2 68.Kf6 (68.g4 hg4 69.Kg4 Be1+/-) 68...Be1 69.Kf7 Bf2 70.Kf6 Be1 71.Kf7 Bf2 72.Ke6 Kg6 73.Ke5 Be1 74.Ke4 Bf2 75.Kf3 Be1 76.Nf4 Kh6 77.Ne6 Kg6 78.Ng5 Kh6 79.Ne4 Bb4 80.Nf2 Kg6 81.Nd3 Bc3 82.Ke4 Ba5 83.Nf4 Kh6 84.Kf5 (better 84.Ke3!?+/-) 84...Be1= 85.Ne2 Bf2 (85...Bd2 86.g4 hg4 87.Kg4+/-) 86.Kf6 (86.Kf4 Be1+/-) 86...Be1 87.Kf7 (better 87.Nd4!? Bc3 88.Ke5+/-) 87...Bf2= 88.Kg8 Kg6 89.Kh8 Be3 90.Kg8 Bf2 ½-½. Spicak,K (1920) - Kaniak,J (1810), 3rd Baltic Cup, 2019.

5.d4 Nbd7 6.c4 c6 (6...Be7 7.Nf3+= a5 8.b5 0-0 9.Nc3 Re8 10.c5 Bg4=; 6...Bd6 7.Nf3 dc4 8.Bc4 Nb6 9.Bd3 Bd3 10.Qd3 a5=; 6...a5 7.b5 dc4 8.Bc4 Nb6 9.Bd3 Bd3 10.Qd3 Qd5=) 7.Nc3 (7.Nf3 Ne4 (7...dc4 8.Bc4 Bd6= 9.0-0 0-0 10.Nc3 b5=) 8.Nbd2 Bd6 9.Ne4 Be4 10.Nd2 Bf5=) 7...Be7 (7...Bd6 8.Nf3 dc4 9.Bc4 b5 10.Bd3 Bd3=) 8.Nf3 Ne4 (8...0-0 9.c5 (9.Rc1+= dc4 10.Bc4 b5+=) 9...a5 10.b5 Ne4=) 9.Bd3 (9.Ne4 de4 10.Ne5 Ne5=) 9...Nc3 (9...a5 10.b5 Nc3=) 10.Bc3 Bd3 (10...dc4=) 11.Qd3 Nf6 12.Nd2 0-0 13.0-0 Qc7 14.f4 g6 (14...Qd7 15.e4=) 15.Rf3 Nd7 (15...b5 16.cb5 cb5 17.Rc1=) 16.g4 (16.e4 f5 17.e5 dc4 18.Qc4 Kf7+=) 16...f5 17.Rg3 Rf7 18.Kh1 (18.gf5 Rf5 19.cd5 cd5= (worse is 19...Rd5 20.e4 Rh5 21.Rf1+=)) 18...Kf8 (18...fg4 19.Rg4 Raf8 20.Rag1+=) 19.Rag1 Nf6 20.g5 Nd7 (20...Ne4 21.Rf3=) 21.c5 Kg8 22.Qe2 Bf8 23.h4 Bg7 24.Nf3 (24.h5 a5=) 24...b6+= 25.Qb2 Rb8 26.cb6 ab6 27.Rc1 b5 28.Qe2 Qb7 29.h5= Nb6 30.Nh4 Nc4 31.hg6+= hg6 32.Ng6 Bh8 33.Kg2 Rh7 34.Ne5 Be5 35.de5 Kg7= 36.Rh1 Rh1 37.Kh1 Rh8 38.Kg1 Kg6 39.Qg2 Qh7 40.Kf2 Na3 41.Ke2 Nc4 42.Kd3 Nb6 43.Bd4+= Nc4 44.Bc3 Qh4 45.Kd4 Qh7 46.Be1?? Qh5 47.Kc5 Qh7 48.Kd4 Nb6 49.Kd3= Qh4 50.Bd2 Na4 51.Qf1 0–1. Begaj,Agron – Basha,Sedat, 23rd ECC Men, 2007.

5.d4 Nbd7 6.Bd3 Bg6 7.Nf3 Bd6 8.h3 Nb6 9.Nbd2 Qe7 10.Qe2 0-0 11.c4 (11.Bg6 fg6 12.e4 de4 13.Ne4 Bb4 14.ab4 Ne4=) 11...dc4 (11...Bd3 12.Qd3 dc4 13.Nc4=) 12.Nc4 (12.Bg6 fg6 13.Nc4 Nc4 14.Qc4 Nd5=) 12...Nc4 (12...Bb4 13.ab4 Bd3 14.Qd3 Qb4 15.Nfd2 Nc4+/–) 13.Bc4= a6 14.Bd3 Nd5 15.0-0 Bd3 16.Qd3 f5 17.Rac1 Rf6 18.Ne5 Rd8 19.f4 Rh6 20.Rf3 Be5 21.fe5 Qg5 22.Qe2 f4 23.ef4 Nf4+= 24.Qf1?? Rf8?? 25.Kh2+= Rh4? 26.Rcc3 Qh6? 27.Bc1 g5? 28.Bf4 gf4? 29.Rc7+- Kh8 30.Rb7 Rg8 31.Rc7 Qf8 32.Rc2 Rg3 33.Rcf2 Qf5 34.Rf4 Rf4 35.Kg3 Qg5 36.Kh2 Rf2 37.Qf2 (37.Qf2 Kg7 38.Qg3+-) 1–0. Fournier,Frederic (1945) – LD (1715), Active (5/1), 2005.

5.d4 Nbd7 6.Be2 a5 (6...Bd6 7.Nf3 c6 8.Nh4 Be4 9.Nc3 0-0 10.0-0 b5+=; 6...Nb6 7.Nf3 a5 8.b5 Na4 9.Bc1 Ne4 10.c4 Nec3+=; 6...c6 7.c4 dc4 8.Bc4 Bd6 9.Nf3 0-0 10.0-0 a5+=; 6...Ne4 7.Nf3 a5 8.b5 Bd6 9.c4 Qf6 10.Nc3 Nc3=) 7.b5 Bd6 8.Nf3 0-0 9.0-0 Nb6 10.Nh4 Be4 +=.

5.d4 Nbd7 6.Nf3 Bd6 7.c4 dc4 8.Bc4 Nb6 9.Bd3 Bd3 10.Qd3 a5 =.

5.d4 Be7 6.c4 0-0 7.c5 a5 8.b5 h6 9.Nf3 Nbd7 10.Bd3 Bd3 11.Qd3 Ne4 12.Nc3 Nc3 13.Bc3 b6 14.c6 Nf6 15.Nd2 a4 16.0-0 Bd6 17.h3 Nh5 18.e4 Nf4 19.Qf3 de4 20.Ne4 (< 20.Qe4 Qg5 21.Kh1 Qb5-/+) 20...Nd5 21.Bb2 Qe7 22.Nc3 Nc3 23.Bc3 Ba3 24.d5 Bd6 25.Qg4 f5 26.Qd4 e5 27.Qd1 a3 28.Re1 e4 29.Qb3 Kh8 30.Qd1 Be5 31.Qc1 Bc3 32.Qc3 Ra5 33.Qb3 Qc5 34.d6 Qd6 (35.Red1 Qe5 36.Ra3 Rb5-+ (< 36...Qb5 37.Qb5 Rb5 38.Ra7-/+)) 0–1. Loulou – fatou, HCL–A1473 playchess.de, 2003.

5.d4 Be7 6.c4 a5 7.cd5 (7.b5 Nbd7=+) 7...ab4 8.de6 fe6 9.ab4 Ra1 (9...Bb4 10.Nc3 Ra1 11.Qa1=+) 10.Ba1= Ne4 11.Qb3 Nc6 12.Bb5 (12.b5 Nb4 13.b6 Nc5=+) 12...Qd5=+ 13.Bc6 bc6 14.Qd5 cd5 15.Ne2 Bb4 16.Bc3 Nc3 17.Nbc3 Bd3 18.Kd1 0-0 19.Nf4? (better 19.f3!? Ra8 20.Nc1 Bc3 21.Nd3-+) 19…Rf4-+ (19...Rf4 20.Nd5 ed5 21.ef4 Bc3-+; 19...Bc3 20.Nd3 Ra8 21.Kc2+=) 0-1. phildo (1905) - s1lence (2250), gameknot.com, 2015.

5.d4 Be7 6.Bd3 Bd3 7.Qd3 Ne4 (7...c6 8.Nf3=) 8.Nd2 (8.Qb5 Nd7+=) 8...Nf6 (8...Nd2 9.Qd2 Nd7 10.Nf3=) 9.Ngf3 (9.Qb5 Nbd7+=) 9...0-0 10.0-0 h6 11.c4 c6 12.cd5 (12.e4 Nbd7=) 12...cd5 13.Ne5 Nc6 14.Nc6 bc6 15.Rac1 Qd6 16.Rc2 Rfc8 17.Rfc1 a6 18.Nf3 Ne4 (18...Nd7!?+/–) 19.Ne5+- Bf6 (19...c5 20.bc5 Qc7 21.f3+-) 20.Nc6 (better is 20.f3 Ng5 21.Rc6 Rc6 22.Rc6+-) 20...Rc6?? (better is 20...Qd7+-) 21.Rc6 Nf2 (21...Qd8+-) 22.Kf2 (22.Rd6 Nd3 23.Rc2 Bg5+/–) 22...Bh4 (22...Qb8 23.Kg1+-) 23.g3 Qe7 (23...Qb8 24.Rc8! Qc8 25.Rc8 Rc8 26.gh4+-) 24.Rc8 (24.Rc8 Qd8 25.Rd8 Bd8 26.Rc6+-) 1–0. Fournier,Frederic (1770) – Arhipych (1705), Active, 2012.

5.Be2 a5 6.b5=+.

5.Be2 c5 6.bc5 Bc5 7.Nf3 0-0 8.0-0 Nbd7 (8...Nc6 9.Nc3=+) 9.Nh4 Qb6 10.Bf6 Nf6 (10...gf6 11.Nf5 ef5 12.d4+-) 11.Nf5 ef5 12.Nc3 Qe6 13.Qb1 a6 14.d4 Bd6 15.Bf3 The isolani on d5 becomes a target (15.Qb7?? Rfb8 16.Rfb1 Rb7 17.Rb7 f4-+) 15...Rac8 16.Qb3 Increasing the pressure on the isolated pawn on d5 16...Ne4 17.Be4 de4 18.Na4 (18.Rfb1!?=+) 18...b5-/+ 19.Nb2 (19.Nc5 Bc5 20.dc5 Rc5-/+) 19...Rc7-+ 20.a4 (20.Nd1!? Rfc8 21.Ra2 Rc4-+) 20...b4 21.Nd1 Rfc8 22.Ra2 Rc2! 23.Qc2 (23.Rc2 Qb3 Double attack (23...Qb3 Decoy; 23...Qb3 Remove defender); 23.Qc2 b3 Double attack (23...b3 Decoy)) 23...Rc2 24.Rc2 b3 25.Rc3 Ba3 26.Rc7 Kf8 27.Rb7 Qc4 28.h4 (28.a5 g5-+) 28...g6 29.a5 Bd6 30.g3 Bc7 31.Nb2 Qc2 32.Ra7 (32.Na4 Ba5 33.d5 Kg7-+) 32...Bd8 (32...Qb2?! 33.Rc7 Qd2 34.Rc8 Kg7 35.Rb8-+) 33.Ra6 Qb2 34.Ra8 Ke7 35.a6 Qa2 36.Rb8 Qa6 37.Rb3 h6 38.Rfb1 Kf6 (38...Bc7 39.Rb7 Kd7 40.Kg2-+) 39.Rb8 Qd6 40.R1b5 (40.R1b7 g5 41.hg5 hg5-+) 40...g5 Black plans f4 41.hg5 hg5 42.Rc8 (42.Ra8 f4 43.gf4 gf4-+) 42...f4 43.Rbc5 (43.Re5 Kg7 44.Re4 f3-+) 43...Kg7 (43...fg3 44.R8c6 gf2 45.Kf2+-) 44.gf4 (44.R5c6 Qd7 45.ef4 gf4 46.gf4 Bb6-+) 44...gf4 45.R8c6 (45.R5c6 Qd7 46.ef4 Bb6-+) 45...Qd7 46.ef4 Qg4 (46...Qg4 47.Kf1 Qf4-+) 0–1. Balkind,Imanuel (2000) – Pischner,Rainer (2355), remoteschach.de, 2004.

5.Be2 Be7 6.g4 (6.Nf3 a5=) 6...Bg6 (6...Be4 7.Bf3=+) 7.h4 h6 8.Nh3 Kf8 (8...Bd6 9.Nc3=) 9.Nf4 Bh7 (9...Be4!? 10.Rh2 Nfd7=) 10.g5+/- Ng8 (10...Be4!? 11.gf6 Bf6+/-) 11.Nh5+- f6 12.Rg1 hg5 13.hg5 Nd7? (better 13...g6 14.Nf4 Qd6+-) 14.g6 (14.g6 Bg6 15.Rg6+-) 1-0. black_bishop_88 (2640) - williamvalas (2440), Quarantε³ne-Bundesliga Team Battle, 2020. (=1.a3 d5 2.b4 Bf5 3.Bb2 e6 4.e3)

6.Bc4 c5 7.bc5= Bc5 8.Nf3 0-0 9.0-0 Nbd7 10.d4 Bd6 11.Nc3 Rc8 12.Be2 Qb6 13.Qd2 h6 (13...Rfd8 14.Rac1=) 14.Rfc1 (14.Rac1 Rfd8=) 14...Bb8 (14...Rfd8 15.Nb5=) 15.Nh4 (15.a4 Bd6=) 15...Bh7 (15...Ne4 16.Ne4 Be4 17.Nf3=) 16.Ra2 (16.f4 Rfd8=) 16...e5 17.d5 (17.de5 Ne5 18.Nf3 Rfd8=+) 17...Qd8 (17...Qd6 18.Rd1=+) 18.g3 (18.Nf3!?=) 18...Nb6=+ 19.Raa1 Nbd5-/+ 20.Nd5 Qd5 21.Qd5 Nd5 22.Nf3 e4 23.Nd2 Bd6 24.Bc4 Nb6 25.Bb3 Rfe8 26.Bd4 Rcd8 27.Nc4 Nc4-/+ 28.Bc4 b6 29.Bb5 Re7 30.Rc6 Bf5 31.a4 Bg4 32.Rac1 Kh7 33.Kf1 Bd7 34.R6c4 Be6 35.R4c2 Bh3 36.Ke1 Bb4 37.Bc3 Ba3 38.Bb2 Bb4 39.Bc3 Bc5 40.Be2 Rc7 41.Bb5 f6 42.Bd4 Bb4 43.Ke2 Bg4 44.Kf1 Rc2 45.Rc2 Bc5 46.Bc5 Rd1 47.Kg2 Bf3 48.Kh3 Rd5 49.g4 bc5 50.Kg3 h5 51.h3 hg4 52.hg4 Rg5 53.Bd7 g6 54.Kf4 Re5 55.Bb5 Kh6 56.Be2 g5 57.Kg3 Be2 58.Re2 c4 59.Rc2-/+ Rc5 60.f4 ef3 61.Kf3 c3 62.Ke4 Rc4 63.Kf3 a5 64.e4 Kg7 65.Ke3 Kf7 66.Kd3 Ra4 67.Rc3 Ra1 68.Rc7 Ke6-+ 69.Rc5 a4 70.Ra5 a3 71.Kd4 a2 72.Ra6 Kf7 73.Ra7 Kg6 74.Kc3 Rc1 75.Kb2 Re1 76.Ka2 Re4 77.Kb3 Rg4 78.Kc3 f5 (79.Kd3 Rg3 80.Ke2 f4-+) 0–1. Manninen,Juha – Gross, corr 3GMM–19, 1997.

6.Bc4 Bd3 7.Qb3 (7.Bd3 Qd3 8.Bf6 gf6=) 7...Bc4 8.Qc4 Qd5 9.Qd5 (worse 9.Qc7 Qg2 10.Qc8 Ke7-/+) 9...ed5 (9...Nd5 10.Nc3=) 10.Nf3 (10.Bf6 gf6 11.Nc3 c6+=) 10...Be7 (10...Nbd7 11.Bf6 Nf6 12.Nc3=) 11.Be5 (11.Bf6 Bf6 12.d4 c6+=) 11...c6 12.Nc3 Nbd7 13.Bf6 Bf6 14.d4 0-0 (14...Nb6 15.Ke2=) 15.0-0 (15.h4 Rfe8=) 15...a6 16.a4 White prepares b5 16...Nb6 17.b5 ab5 18.ab5 Nc4 19.bc6 bc6 20.Rfb1 g6 21.h3 Kg7 22.Kf1 h5 23.Ra8 (23.e4 de4 24.Ne4 Rfb8+=) 23...Ra8 24.Ne1?? (24.Rc1 Be7=) 24...Ra3 (better 24...Nd2 25.Ke2 Nb1 26.Nb1 Ra2 27.Nd2 Be7-+) 25.Rc1=+ Nd2 26.Ke2 (26.Kg1 Be7=+) 26...Nc4 (26...Nb3!? 27.Rc2 Bd4 28.ed4 Nd4 29.Kd2 Nc2 30.Nc2 Rb3-/+) 27.Nd3 Be7 28.Nc5 (better 28.Rc2!?=) 28...Bc5-/+ 29.dc5 Kf6 30.e4 d4 31.Nd1? (better 31.Nb1!? Ra4 32.f4=+) 31...d3-+ 32.Kf1 Nd2 (better 32...Ra4 33.Rc3 Nb2-+) 33.Kg1? (better 33.Ke1 Ne4 34.Rc4-/+) 33...Ne4-+ 34.Ne3 d2 35.Rd1 Ra2 0-1. sezwho (1910) - kabalist (2170), Rated Bullet game, lichess.org, 2014.

6.Bc4 Bd6 7.d3 0-0 8.e4 +/–.

6.Bc4 Bd6 7.Nf3 h6 8.Nc3 0-0 9.d4 Nbd7 10.0-0 Nb6 11.Ba2 Nbd5 12.Nd5 Nd5 13.Bd5 ed5 14.Rc1 c6 15.Ne5 Be5 16.de5 Qg5 17.Qf3 Be4 18.Qg3 Qg3 19.hg3 Rfe8 20.f3 Bd3 21.Rfd1 Bb5 22.Re1 a5 23.e4 de4 24.Re4 ab4 25.ab4 Ra2 26.Bd4 Rd8 27.f4? (27.Bc3 Kf8+=) 27...Rd2 (better is 27...Bd3 28.Bb6 Be4 29.Bd8 Rg2 30.Kf1 Rg3-+) 28.Bb6 Rd1 29.Rd1 Rd1 30.Kh2 Rd2 31.f5 White plans e6 31...Bf1 32.e6 Rg2 33.Kh1 fe6 34.fe6 Re2 (34...Rg3?? 35.e7 Kh7 36.e8Q+-) 35.Re2 Be2 36.e7 Kf7 37.Bc5 Bf3 38.Kh2 Bg4 39.Kg2 Bd7 40.Kf3 b6 41.Bb6 Ke7 42.g4 Kf6 43.Bd4 Kf7 44.Kf4 g5 45.Kf3 Kg6 46.Bc5 h5 47.gh5 Kh5 48.Kg3 Kg6 49.Be7 Kf5 50.Bc5 Ke4 51.Be7 g4 52.Bc5 Kd3 53.Bf8 Kc4 54.Bc5 Kd5 55.Bf8 Kc4 56.Bc5 ½–½. Rush,Bradley – Hilton,Stephen, 51. LSS No Engine Cup Preliminary, 2011.

6.Nc3 Nbd7 7.d4 Be7 8.cd5 cd5 9.Bd3 (9.Nf3 Rc8=+) 9...Bd3 10.Qd3 a6 (10...a5 11.ba5 Qa5 12.Nf3=+) 11.Na4 (11.Nf3 Nb6=) 11...b6 12.Rc1 Rc8 (12...a5 13.b5=) 13.Ne2 (13.Qa6 Rc1 14.Bc1 0-0=) 13...0-0 (13...Rc1 14.Nc1 Qa8 15.Nc3=+) 14.Nec3 (14.Qa6 Rc1 15.Bc1 Bd6=) 14...b5 (14...Rc4 15.Ne2=+) 15.Nc5= Nc5 (15...Rc6 16.0-0=) 16.dc5 Nd7 17.0-0 Bf6 18.Rfd1 Nb8 19.Rc2 Nc6+= 20.Rcd2 Qc7 21.Qe2 Ne5 22.a4 Nc4 23.Rd3 Nb2=+ 24.Qb2 ba4 25.Qa3 a5 26.Na4 ab4 27.Qb4 Rb8 28.Qd2 Rb7 29.Qc2 Ra8 30.Nb6 0–1. mgriffin – peppone (1970), net–chess.com, 2001.

6.cd5 ed5 7.Nf3 Bd6 8.Be2 0-0 9.d3 Nbd7 10.0-0 Re8 11.Nc3 Ne5 12.Nh4 Qd7 (12...Be6 13.Nf3+=) 13.Nf5= Qf5 14.e4 (better is 14.Qd2=) 14...Qd7?? (better is 14...de4 15.de4 Ne4+=) 15.d4+/– Ng6 16.e5 Ne5 17.de5 Be5 18.Qc2 Re7 19.Bf3 Rae8 20.Rad1 Qc7 21.g3 b6 22.Bg2 d4 (better is 22...a5!?+/–) 23.Ne4 Ne4 24.Be4 (24.Qe4?! c5 25.Qc2 Bf6+/–) 24...c5 25.Bh7 Kh8 26.Bf5 g6 27.Bd3 Kg7 28.Bc1 Bf6 29.f4 Rc8 30.Ba6 Rce8 31.f5 g5 32.Rf2 Qd6 33.Bb5 Rc8 34.Re2 Rec7 35.Qb1 c4 36.Ba6 Rd8 37.Qe4 d3 38.Red2?? Qd4 39.Qd4+= Bd4 40.Kf1 Be3 41.Rd3 cd3?? 42.Be3+- Rc3 43.Bg5 Rd5 44.Bc1 Rf5 45.Ke1 f6? 46.Bd3 Rh5 47.h4 Rd5 48.Ke2 Re5? 49.Kd2 Rc7 50.Rf1 Rd7 51.Bb2 Re6 52.g4 Red6 53.Rf3 Kh6 54.Bf6 Rf7 55.g5 Kh5 56.Ke2 Kh4 57.g6 (57.g6 Rff6 58.Rf6 Rf6 59.g7 Re6 60.Kf3 Rf6 61.Kg2+-) 1–0. Didicher,Dietmar (1610) – Traut,Stefan, Hessen–ch Gr–D, 2008.

6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

6.h3 dc4 7.Bc4 b5 8.Be2=+.

6.h3 Bd6 7.Nf3 (7.c5 Bc7=+) 7...h6 (7...dc4!? 8.Bc4 b5=+) 8.c5= Bc7 9.Nd4 Bh7 10.Be2 Ne4 (10...Qe7 11.0-0=) 11.d3 (11.0-0 e5 12.d3 Nf6=) 11...Nf6 12.Nd2 Nbd7 13.N2f3 0-0 14.0-0 Nh5 (14...e5 15.Nb3=) 15.Nb3 (15.Bc3 e5 16.Nb3 Nhf6=) 15...Re8 16.Nfd4 e5 (16...Nhf6 17.f4=) 17.Nc2 (better 17.Bh5 ed4 18.Nd4+/-) 17...Qg5?? (better 17...Nhf6=) 18.Bh5+- Bf5 19.Bg4 Nf6 20.Bf5 Qf5 21.Qf3?? (better 21.d4+-) 21...Qd3= 22.Rfc1? (better 22.Ncd4 ed4 23.Nd4=) 22...Qb3-/+ 23.Rab1 Qd3 24.Ne1 Qg6 25.Qg3? (better 25.Qe2!?-/+) 25...Qg3-+ 26.fg3 Nh5 (26...Ne4 27.Rd1-+) 27.g4 Ng3 28.Kf2 Ne4 29.Kg1? (29.Ke2 a5-+) 29...Re6 (better 29...Nd2!? 30.Ra1 Nb3 31.Nf3-+) 30.Nf3 Rae8 (30...a5 31.Ba1-+) 31.Re1 a5 32.Rbd1 ab4 (32...Ra8 33.Ra1-+) 33.ab4 Ra8 (33...b6 34.cb6 Bb6 35.g5-+) 34.Ra1-/+ Rb8 35.Rad1? (better 35.Red1-+) 35...b6 36.Nd2 (36.Ba3 bc5 37.bc5 Rb3-+) 36...Nd2 37.Rd2 e4 (better 37...bc5 38.bc5 Ba5-+) 38.Bd4 bc5 39.Bc5 Rb5 40.Ra1 Kh7 41.Ra7 Bb6 42.Rf7 (42.Bb6 Rb6 43.Rd4 Kg6-+) 42...Bc5 43.bc5 Rc5 44.Ra2 (44.Kf2 Kg6 45.Rc7 Rf6 46.Ke2 Rf7 47.Rf7 Kf7-+) 44...Rc1 45.Kh2 Rc3 46.Raa7 (46.Re2 c5-+) 46...Rg6 (46...Re3?! 47.Rg7 Kh8 48.Rh7 Kg8 49.Rag7 Kf8 50.Rc7+=) 47.Ra8 Re3 48.Rff8 Rf6 49.Rf6 gf6 50.Ra7 (50.Rc8 Rc3-+) 50...Kg6 51.Rc7 Rc3 52.h4 (52.Rd7 Kg5-+) 52...e3 (52...f5 53.gf5 Kf5 54.Rh7-+) 53.Rc8 (53.Re7-+) 53...d4 54.Rg8 (54.Re8 Rc5 55.g5-+) 54...Kf7 55.Rh8 (55.Ra8 d3 56.Ra7 Ke6 57.Ra8-+) 55...Kg7 (better 55...e2 56.Rh7 Kg8 57.Re7-+) 56.Rd8 (56.Re8-+) 56...e2 57.Rd7 Kg6 (57...Kf8 58.Rd6 e1Q 59.Rf6 Ke7 60.Rf3 Qh4 61.Kg1 Rf3 62.gf3 d3 63.Kf1 d2 64.Ke2 Qe1 65.Kd3 d1Q 66.Kc4 Qd5) 58.h5 Kg5 59.Rg7 Kf4 60.Rf7 (60.Rb7 e1Q 61.Rb1 Qb1 62.g5 Rc1 63.g3 Kf3 64.gf6 Rh1) 60...e1Q 61.Rf6 Kg5 (61...Kg4 62.Rg6 Kf5 63.Rg3 Qg3 64.Kg1 Rc1) 62.Rf5 (62.Rg6 Kh4 63.Rf6 Qg3 64.Kg1 Rc2 65.Kf1 Qg2 66.Ke1 Qe2) 62...Kh4 (62...Kg4 63.Rf8 Qg3 64.Kg1 Rc1 65.Rf1 Qe3 66.Kh2 Rf1 67.g3 Qg3) 63.Rf6 (63.g3 Qg3 64.Kh1 Rc1 65.Rf1 Rf1) 63...Rh3! 64.gh3 (64.gh3 Qg3 Mate attack) 64...Qg3 65.Kh1 Kh3 66.Rh6 (66.Rf2 Qf2 67.g5 Qe1) 66…Qg2 (66...Qe1) 0-1. anais - MillerTime (1710), Rated Classical game, lichess.org, 2013.

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.Nf3 c6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.Nf3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.Nf3 Be7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Be7).

5.a5 Bb4 6.Bb5 c6 7.Be2 0-0 8.Nf3 Nbd7 (8...Ba5 9.Bf6 gf6 10.0-0-+) 9.c3? (9.a6!?-/+) 9...Bd6 (9...Ba5 10.0-0-+) 10.d4 Bb1 (10...Qc7!? 11.0-0-+) 11.Qb1-/+ c5 12.Bb5 cd4 13.Nd4 e5 14.Nf5 Bc7 15.0-0 Ba5 (15...a6 16.Ba4 g6 17.Ng3-/+) 16.Rd1 a6 (16...Nc5 17.c4 a6 18.Be5 ab5 19.Qb5-+) 17.Bd3?? (better 17.Bd7!? Nd7 18.Rd5+=) 17...Nc5 (17...e4 18.Bc2 g6 19.Ra5 Qa5 20.Ne7 Kg7 21.c4=+) 18.Ba3 (18.c4 Nb3 19.Be5 Na1 20.cd5 Nb3 21.Qb3 A) 21...Nd5? 22.Bg7 (22.Ng7?! Bc7 23.Ba1 Qd6+/-) 22...Re8 23.Be2+-; B) 21...Re8=) 18...Nd3 (better 18...b6!?-+) 19.Qd3 Re8 20.Nd6 (better 20.Be7!? Re7 21.Ne7 Qe7 22.Ra5=+) 20...Re7-+ 21.Rab1 (21.c4!? Rd7 22.cd5-/+) 21...b5 22.Nb5 (22.Nf5 Rd7-+) 22...ab5 (22...Rd7!? 23.Nd6 Rd6 24.Bd6-+) 23.Be7 Qe7 24.Qd5?? (better 24.Rb5 e4 25.Qd4-+) 24...Nd5 25.Rd5 Qa3 26.Rdb5 h6 (26...Bc7 27.h3-+) 27.Re5 Bc3 28.Reb5 Kh7 29.R5b3 (29.h3-+) 29...Qb3! 30.Rb3 (30.Rb3 Ra1 Mate attack) 30…Ra1 (30...Ra1 31.Rb1 Rb1) 0-1. alex296 – Aguerrero, Rated Classical game, lichess.org, 2013.

5.b5 Be7 6.Ne2 h6 7.Ng3 Bh7 8.Be2 c5 9.0-0 0-0 10.f4 d4 11.Bf3 Nd5 12.Qc1 a6 13.c4 Nb4 (13...dc3 14.Nc3 Nc3 15.Qc3+=) 14.Bb7+= Nd3 15.Qc2 (worse is 15.Ba8 Nc1 16.Rc1 Bg6=) 15...Ra7 16.Be4 Be4 17.Ne4 Nb2 18.Qb2 de3 19.Qe5 (19.de3!? Qd3 20.Nbc3 Qe3 21.Qf2+=) 19...Nd7 20.Qh5 Nf6 21.Qf3?? (21.Nf6 Bf6 22.Ra2-/+ (22.Qc5?? Bd4 23.Qf8 Qf8 24.de3 Ba1-+)) 21...e2!-+ 22.Qe2 Qd4 23.Kh1 (23.Qf2 Qa1 (23...Ne4?! 24.Qd4 cd4 25.b6-+) 24.Nc5 Ng4-+) 23...Ne4 (23...Qa1!? 24.Nbc3 Qa3 25.Ng3-+) 24.Na3 Rd8 0–1. Stankovski,Marin (1750) – Filev,Georgi (2290), Kesarovski Georgiev mem 6th, 2007.

5.b5 Be7 6.Nf3 Nbd7 7.c4 (7.a5 Bg4=) 7...dc4 (7...0-0 8.Be2+=) 8.Bc4= 0-0 9.d4 (9.0-0 Nb6 10.Be2 Nbd5=) 9...Be4 (9...Bb4 10.Nbd2=) 10.Nbd2 Bb4 (10...Bg6 11.0-0=) 11.0-0+= Nb6 (11...Bf5 12.a5+=) 12.Bb3 (better is 12.Ne4!? Ne4 13.Bd3+/–) 12...Bd3= 13.Re1 Ne4 14.Bc2 Nd2 15.Nd2 Bc2 16.Qc2 ½–½. Schutz – Schmitt, Hamminkeln, 1986.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 Nf6 9.Nc3 Qe7 10.Nf3= Qd8 11.Be2 (11.cd5 ed5 12.Be2 c5=) 11...Be7 (11...dc4 12.Bc4 Bd3 13.Bd3 Qd3 14.Ne5=) 12.Nh4 Bg6 13.Ng6 hg6 14.0-0 (14.bc6 bc6 15.d4 Bb4+=) 14...0-0 (14...dc4 15.Bc4 g5 16.bc6=) 15.Bb2 (15.d4 Qc7+=) 15...Ne4 (15...Qd6 16.bc6 Nc6 17.cd5 Nd5 18.Nd5 Qd5 19.d3+=) 16.Ne4+- de4 17.Qb1 (17.Qc2 cb5 18.cb5 Qd5+-) 17...f5 (better 17...Qd2!? 18.Bg4 Qd3=+) 18.Qc2 (18.Rd1 Qc7+-) 18...Bf6 (18...Qc7 19.d4+-) 19.Ba3 (19.Bf6 Qf6 20.f3 ef3 21.Bf3 Rd8+-) 19...Re8 (19...Rf7 20.Rd1+-) 20.f3 (20.Rd1 Qc7+-) 20...ef3 21.Bf3 cb5 22.cb5 Qa5 (22...Qd7 23.b6+-) 23.Qd3 (23.Qb3 Qd2 24.Bb7 Qd7+-) 23...b6 24.Rb1 1–0. GuestRZGB – guestHKJD, freechess.org, 2016.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 Nf6 9.Nf3 Bb4 (9...Bd6 10.bc6 bc6 11.cd5 ed5 12.Be5=) 10.Nd4 (10.Bc3 Bd6=) 10...Bg6 11.bc6 (11.Be2=+) 11...Nc6 (11...bc6!? 12.cd5 ed5=+) 12.Nc6+= bc6 13.cd5 (13.Qa4 Qb8 14.Bf6 gf6 15.Na3=+ (15.Qc6? Ke7-+)) 13...ed5 (13...Qd6!?=) 14.Qa4+- Qb6 (14...Bb1!? 15.Qb4 Bg6+-) 15.Qa8+- Qd8 (15...Ke7 16.Qh8 Bb1 17.Bd4+-) 16.Qc6 Qd7? (better 16...Kf8 17.Bf6 gf6+-) 17.Qa8 Qd8 (17...Ke7 18.Qh8 Qf5 19.Bf6 gf6 20.Na3 Ba3 21.Qb8+-) 18.Qa4 Qd7 (18...Nd7 19.Qb4 Qe7+-) 19.Bb5 (19.Bb5 0-0 20.Bd7 Nd7 21.Qd7 Bb1 22.Qg4 Bd2 23.Kd2+-) 1–0. GuestWMQY – GuestLBPC, freechess.org, 2018.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Nf6 8.Nf3 c5 (8...Bd6 9.Be5=+) 9.c4 (9.Nh4 Be4=) 9...Nbd7 (9...Bd6 10.Be5=+) 10.Nc3 (10.d4 Bb1 11.Qb1 Qa5 12.Kd1 dc4 13.Bc4 Qa4 14.Bb3 Qb5-/+) 10...Bd6 11.h3 (11.d4 Qa5=+) 11...h6 (11...dc4 12.Bc4 Nb6 13.Be2=+) 12.d3 0-0 13.Be2 Qc7 14.0-0 Rd8 (14...Ra8 15.Nh4 Bh7 16.cd5 ed5 17.Nf3=+) 15.Nh4 (15.cd5 ed5 16.Qc2 c4=+) 15...Bh7 16.f4 (16.cd5 ed5 17.Nf3 Ra8=+) 16...Nb6 17.Qb3 d4 18.Ne4 Be4 19.de4 Ne4 20.Qc2 Ng3 21.Rf3 Ne2 22.Qe2 Be7 23.g3 d3 24.Qd1 Nc4 25.e4 d2 26.e5 Qa5 27.Bc3 Qb5 28.Ng2 Nb2 29.Bb2 Qb2 30.Ne3 Qd4 31.Kg2 c4 32.Nc2 Qe4 33.g4 Rd3 0–1. Riveline,Maurice – Berlacki,Piotr, Paris op–B, 1996.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Nf6 8.Nf3 Nbd7 9.c4 Nc5 10.d4 (10.Bf6 Qf6 11.d4 Ne4=+) 10...Nce4 11.Bd3? (better 11.Nbd2=+) 11...Qa8-+ 12.Nbd2 (12.Bc3 Nc3 13.Nc3 Qa3-+) 12...Nd2 13.Kd2 Bb4 14.Ke2 (14.Bc3 Qa2 15.Qc2 Bc3 16.Kc3 Qa3 17.Qb3 Qb3 18.Kb3 Bd3 19.cd5 Nd5-+ (19...Bb5?! 20.de6 fe6 21.Ra1-+)) 14...Qa2 15.Nd2 (15.Qc2 Qc2 16.Bc2 Bc2 17.Rc1-+) 15...Bd3 16.Kd3 Ne4 17.Ne4 (17.Ke2 Nd2 18.Qc1 Ne4 19.Bb2-+) 17…dc4 (17...Qc4) 0-1. Mely (2235) - the_tiger (2830), ChessWorld.net, 2016.

5.a4 Nd7 6.Nf3 ab5 7.ab5 Ra1 8.Ba1 Ngf6 9.c4 (9.Be2 Bg4=) 9...Bd6 10.cd5 ed5 11.Nd4 Bg6 12.Be2 0-0 13.0-0 Qe7 (13...Re8 14.f4 h6 15.Nc3=+) 14.f4= h6 15.Nc3 Ra8 16.f5 Bh7 17.Bb2 (17.Qc2 Nb6=+) 17...Nc5 (17...Be5 18.Qc2=+) 18.Qc2= h5 (18...Nce4 19.b6=+) 19.g3 (19.Kh1 Nce4=) 19...h4 (19...Nce4 20.b6=) 20.g4 (20.gh4 Nce4=) 20...h3 21.Bf3 (21.b6 c6=+) 21...Qe5 22.Rf2 Nce4 23.Ne4 Ne4 (23...de4!? 24.Be2 Qe7=) 24.Re2= Ng5 25.Bh1 Ne4 (25...Ba3 26.Ba3 Ra3 27.Re1+=) 26.Bf3 (26.d3 Nf6 27.Nb3=) 26...Ng5 27.Bh1 Ne4 (27...Ba3!?=) 28.d3+- Ng3 (28...Nf6 29.Nb3 Qe7 30.Bf6 Qf6 31.Bd5=) 29.hg3 Qg3 30.Kf1 Re8 (30...h2 31.Re1 Bb4 32.Rd1 Qg4 33.Bd5 Bf5 34.Kf2 Qh4 35.Kg2+=) 31.Bd5 (31.Bc1!?+-) 31...h2+- 32.Rh2 Qh2 33.Qh2 (worse 33.Bb7 Qh3 34.Qg2 Qe3-/+) 33...Bh2 34.Nf3 Bg3 35.Ng5 (35.e4!?+-) 35...Re3+= 36.Bf7 Kf8 37.Ba3 (worse 37.Nh7 Kf7 38.Ng5 Kg8=+) 37...Bd6 38.Bd6 cd6 39.Bd5 Bg8 40.Be4 (worse 40.Bb7 Rd3 41.Bc6 Ke7=+) 40...d5 41.Kf2 d4 42.Nf3 (42.Bb7?! Rd3 43.Nf3 Bc4=) 42...Ke7 (42...b6 43.Nd4 Rh3 44.Kg2+-) 43.Nd4 Rh3 44.Kg2 (44.Bb7?! Rd3 45.Nc6 Kd6=) 44...Rh6 45.Bb7 (45.g5 Rb6+-) 45...Rd6 46.Nc6 Kf6 (46...Ke8 47.Kf3 Rd3 48.Ke4+-) 47.Kg3 (47.Kf3 Rd3 48.Kf4 Rd1 49.g5 Kf7+-) 47...Rd3 48.Kf4 g5 49.fg6! Rb3 (49...Kg6 50.Ne5 Double attack) 50.Ba6 Be6 51.g5 (better 51.g7!?+-) 51...Kg6= 52.Ne5 (52.Ne7 Kf7 53.Nf5 Rb4 54.Ke5 Bc4=) 52...Kh5 53.g6 Kh6 54.Ke4 Rb4 55.Kd3 Kg7 56.Kc3 Ra4 57.Bb7 Kf6 58.Nf3 Kg6 59.Nd2 (59.Nd4 Bf7=) 59...Kf6 60.b6 Ke7 61.Bh1 (61.Be4 Kd6=) 61...Kd7 62.Be4 (62.Ne4 Kc8=) 62...Kc8 63.Bh1 (63.Bc6 Ra6 64.Nc4 Bc4 65.Kc4 Rb6=) 63...Kb8 (63...Ra6 64.b7 Kb8 65.Be4=) 64.Be4 (64.Bc6 Rf4=) 64...Ra6 (64...Bf7 65.Kd3=) 65.b7 (65.Nc4 Bc4 66.Kc4 Rb6=) 65...Ra4 66.Kd3 Bd7 (66...Bf7 67.Ke3=+) 67.Bd5 Bb5 68.Kc3 Rf4 69.Nb3 Rh4 70.Nc5 Rg4 71.Ne6 Rg6 72.Kb4 Be8 73.Nd4 Rh6 74.Kc5 Ba4 75.Nf3 Kc7 76.Nd4 Rh5 77.Ne6 Kb8 78.Kc4 Rh4 79.Kc3 Be8 80.Nc5 Bb5 81.Kb3 Rd4 82.Be6 Bc6 83.Kc3 Rh4 (83...Rd6 84.Bc8 Ka7 85.Kb4=) 84.Bc8 Ka7 85.Kd3 Bb5 (85...Bb7 86.Nb7 Kb8 87.Bf5=+) 86.Kd2 (86.Ke3 Rc4 87.Na6 Ba6 88.b8Q Kb8 89.Ba6 Rc5=+) 86...Rc4 (86...Rh5 87.Na6 Ba6 88.b8Q Kb8 89.Ba6=+) 87.Ne6 (87.Na6 Ba6 88.b8Q Kb8 89.Ba6 Rh4=+) 87...Kb8 88.Ke3 Bc6 89.Kd3 (89.Nd8 Bh1=+) 89...Rc1 90.Kd4 (90.Kd2 Ra1=+) 90...Bb7 (90...Rd1 91.Ke5=+) 91.Bb7 Kb7 92.Kd5 (92.Ke5 Kc6=+) 92...Kb6 93.Nd4 Rc5 94.Ke4 (94.Kd6 Rc3=+) 94...Rh5 95.Ne6 Kc6 96.Nf4 Rh1 97.Nd5 Rh4 98.Nf4 Kc5 (98...Kd6 99.Kf5=+) 99.Ke5 Rh7 (99...Kc4 100.Ng2=+) 100.Ne6 Kc4 101.Nf4 (101.Ke4 Rh4 102.Ke5 Rh5 103.Ke4 Rh1=+) 101...Rh1 102.Ne6 Re1 103.Kd6 Re2 104.Nf4 Re4 105.Ne6 Re1 106.Nf4 Kd4 107.Ne6 Ke3 (107...Ke4 108.Nc5 Kf5 109.Kd5=+) 108.Kd5 (108.Ke5 Kf3 109.Kf5 Rb1=+) 108...Rh1 109.Ke5 Rh5 110.Kd6 Ke4 111.Nc5 Kd4 112.Ne6 Kc4 113.Nf4 Rf5 114.Ne6 Rd5 115.Kc6 (115.Kc7 Kb5=+) 115...Rd1-/+ 116.Nc5 Kd4 117.Kd6 Rh1 118.Ne6 Ke4 119.Nc5 Kf5 120.Kd5 Rd1 121.Kc4 Kf4 122.Nd3 Ke3 123.Nc5 Rd4 124.Kc3 Rh4 125.Nd3 Ra4 (125...Ke4 126.Kc4=+) 126.Nc5 Rd4 127.Kb3 Kd2 (127...Rd2 128.Kc3=+) 128.Na6 (128.Ne6 Rg4=+) 128...Re4 129.Nc5 Rh4 130.Na4 Kd3 131.Nc3 Kd4 132.Kb4 Rg4 133.Na4 (133.Nb5 Kd5 134.Kc3 Rg1-/+) 133...Rg2 134.Kb5 Rg6 (134...Rc2 135.Nb6-/+) 135.Nb6 Rh6 136.Nc8 Rf6 (136...Rh1 137.Ne7-/+) 137.Ne7 Ke5 (137...Rf1 138.Nc6 Kd5 139.Nb4 Ke4 140.Kc5-/+) 138.Nc6 (138.Kc5 Rf1-/+) 138...Rc6 (138...Kd6!?-/+) 139.Kc6= ½–½. GuestZMZH – GuestWVML, freechess.org, 2018.

5.a4 Nf6 6.Nf3=+.

5.ba6 Na6 6.Bb5 (6.Nf3 Bg4=) 6...c6=+ 7.Ba6 Ra6 8.h3 (8.Nf3 Nf6=+) 8...Nf6 9.Nf3 Ne4 10.Nc3 f6 (10...Nc3 11.Bc3 b5 12.0-0=+) 11.Ne4 (11.Nd4 Ba3 12.Ne4 A) worse 12...Be4 13.Ba3 (worse 13.Ne6 Qd7 14.Ba3 Qe6=+) 13...Ra3 14.Ne6+=; B) 12...Bb2=+) 11...Be4 12.0-0 Bd6 13.d3 Bf5 (13...Bg6 14.Qe2=+) 14.c4 (14.Nd4 Be5=) 14...0-0 (14...dc4 15.e4 Bg6 16.dc4=) 15.cd5 (15.Nh4 Be5 16.d4 Bc7 17.Nf5 ef5=) 15...cd5 (15...ed5 16.e4 de4 17.Nd4=+) 16.a4 (16.Nh4 Be5 17.d4 Bc7 18.Nf5 ef5=) 16...Qe8 17.e4 (17.Ba3 Ba3 18.Ra3 Qd7=+) 17...Bg6 (better 17...de4!? 18.Nh4 Bg6 19.Ng6 Qg6 (worse 19...hg6 20.de4 Rf7 21.Qg4+=) 20.de4 Qe4-/+) 18.ed5= ed5 19.Re1 Qf7 20.Nh4 Bh5 21.g4 Bg6 22.Qf3 (better 22.Qb3=) 22...Re8?? (better 22...Rfa8=+) 23.Re8+/- (23.Ng6?! Re1 24.Re1 hg6=) 23...Qe8 24.Ng6 hg6 25.Qd5 Kh8 (25...Qf7 26.Qf7 Kf7 27.Bc3+/-) 26.Qb7+- Ra4 27.Ra4 Qa4 28.g5 fg5?? (better 28...Qf4 29.Qc8 Kh7+/-) 29.Qg7 1-0. Yuris__ - will986, Rated Classical game, lichess.org, 2013.

5.Nf3 ab5 6.Bb5 c6=.

5.a4 Nd7 A) 6.Nf3 Ngf6 7.Be2 Bd6 8.Nh4 Be4 9.d3 Bg6 10.0-0 Qc7 11.Nf3 e5 12.Nbd2=; B) 6.a5 B1) 6...a6 7.Nc3 (7.Bc3 e5 8.ba6 ba6 9.d4 ed4 10.ed4 c4 11.Nf3 Rb8 12.Be2+=; 7.b6 Ngf6 8.Nf3 Bd6 9.Be2 Qe7 10.0-0 e5 11.d4 cd4 12.ed4=; 7.Nf3 ab5 8.Bb5 Ra5 9.Ra5 Qa5 10.Bd7 Kd7 11.0-0 Ke8 12.d3+=) 7...ab5 8.Bb5 Ra5 9.Ra5 Qa5 10.Nge2 Qb4 11.Qa1 Qh4 12.Na4=; B2) 6...Ngf6 7.Ne2 (7.a6 b6 8.Nf3 Bd6 9.Be2 e5 10.0-0 Qc7 11.h3 0-0-0 12.Nh4+=; 7.Nf3 a6 8.b6 Bd6 9.Be2 Qe7 10.0-0 e5 11.d4 0-0-0 12.c4=; 7.Be2 a6 8.b6 Bd6 9.Nf3 Qe7 10.0-0 e5 11.d4 0-0-0 12.c4=) 7...e5 8.a6 b6 9.Ng3 Be6 10.Bd3 Qc7 11.0-0 e4 12.Be2=; C) 6.Ne2 C1) 6...e5 7.a5 (7.Ng3 Be6 8.Bd3 c4 9.Bf5 Bf5 10.Nf5 Qf6 11.Ng3 Qg6 12.Nc3=) 7...Bd6 8.Ng3 Be6 9.a6 b6 10.Bd3 Ne7 11.f4 e4 12.Be2=; C2) 6...Nh6 7.Ng3 (7.a5 a6 8.b6 Qe7 9.Ng3 0-0-0 10.c4 Bg6 11.Be2 d4 12.ed4=) 7...Nf6 8.Nf5 Nf5 9.Bd3 Nd6 10.0-0 c4 11.Be2 Be7 12.d3=; C3) 6...Ndf6 7.Ng3 (7.a5 Bd6 8.Ng3 Bg6 9.Be2 a6 10.f4 c4 11.b6 Qd7 12.0-0=) 7...Nh6 8.Nf5 Nf5 9.Bd3 Nh4 10.0-0 Bd6 11.a5 c4 12.Be2=; C4) 6...Ngf6 7.Ng3 Bg6 8.a5 a6 9.b6 Bd6 10.Be2 Qe7 11.0-0 h5 12.h4+=; D) 6.Be2 D1) 6...Ngf6 7.f4 (7.Nf3 Bd6 8.Nh4 Be4 9.d3 Bg6 10.a5 a6 11.Nc3 b6 12.Ng6=; 7.a5 a6 8.b6 Bd6 9.Nf3 Qe7 10.0-0 e5 11.d4 0-0-0 12.c4=) 7...Be7 8.Nf3 Ne4 9.0-0 Bf6 10.Ne5 Qe7 11.a5 0-0 12.a6=; D2) 6...f6 7.d3 (7.a5 a6 8.b6 Qe7 9.Nf3 e5 10.c4 dc4 11.Bc4 e4 12.Nh4=; 7.Nf3 Bd6 8.a5 a6 9.Nc3 Ne7 10.0-0 0-0 11.Nh4 Qc7 12.f4=) 7...a6 8.Bh5 g6 9.Bf3 g5 10.Nd2 ab5 11.ab5 Ra1 12.Ba1+=; D3) 6...e5 7.Nf3 (7.a5 Ngf6 8.Nf3 Bd6 9.a6 b6 10.d4 cd4 11.ed4 e4 12.Ne5+=; 7.d3 Ngf6 8.Nf3 Bd6 9.a5 a6 10.b6 Qe7 11.0-0 0-0-0 12.Nbd2+=) 7...e4 8.Ne5 Qf6 9.d4 Bd6 10.Nd7 Bd7 11.Nc3 Ne7 12.dc5=.

5.a4 Nf6 6.Be2 A) 6...Bd6 7.Nf3 (7.d3 e5 8.Nf3 Nbd7 9.a5 a6 10.b6 Qe7 11.0-0 0-0-0 12.Nbd2+=) 7...Be4 8.Nc3 0-0 9.Ne4 de4 10.Ne5 Be5 11.Be5 Nbd7 12.Bd6+=; B) 6...a6 7.Nf3 Bd6 8.ba6 Na6 9.Bb5 Kf8 10.0-0 Kg8 11.d3 Nc7 12.Nbd2=; C) 6...Nbd7 7.Nf3 Bd6 8.Nh4 Be4 9.d3 Bg6 10.0-0 Qc7 11.Nf3 e5 12.Nbd2=.

5.a4 Nf6 6.Ne2 Bd6 7.Ng3 (7.Nbc3 0-0 8.Ng3 d4 9.Na2 Bg3 10.hg3 e5 11.Be2 Nbd7 12.Bf3+= –0.69; 7.a5 e5 8.Ng3 Bd7 9.c4 a6 10.ba6 Ra6 11.Nc3 d4 12.Nce4+=) 7...Bg6 8.Be2 h5 9.0-0 h4 10.Nh1 h3 11.g3 0-0 12.f3 =.

5.a4 Nf6 6.Nf3 A) 6...Nbd7 7.Be2 Bd6 8.Nh4 Be4 9.d3 Bg6 10.f4 Qa5 11.Bc3 Qb6 12.Na3=; B) 6...Be7 7.Be2 Ne4 8.d3 Qa5 9.Nfd2 Nd2 10.Qd2 Qd2 11.Nd2 0-0 12.e4=; C) 6...Bg4 7.Be2 (7.Nc3 Bd6 8.Be2 0-0 9.0-0 Qa5 10.h3 Bf3 11.Bf3 Nbd7 12.Be2+=; 7.h3 Bh5 8.Be2 Bd6 9.0-0 0-0 10.Nc3 Qa5 11.Nb1 Nbd7 12.Bc3+=; 7.Bd3 Bd6 8.h3 Bf3 9.Qf3 Nbd7 10.Qd1 c4 11.Be2 0-0 12.0-0+=) 7...Bd6 8.0-0 0-0 9.h3 Bf3 10.Bf3 Nbd7 11.a5 a6 12.b6=; D) 6...Bd6 7.Be2 Nbd7 8.Nh4 Be4 9.d3 Bg6 10.0-0 Qc7 11.Nf3 a6 12.Nbd2=.

5.a4 Nf6 6.h3 Bd6 (6...Nbd7 7.Nf3 Be4 8.Nh4 h6 9.d3 Bh7 10.Be2 Bd6 11.0-0 0-0 12.a5=) 7.g4 (7.Nf3 Be4 8.Nc3 Bf3 9.Qf3 Nbd7 10.a5 a6 11.g4 0-0 12.g5+=; 7.Be2 e5 8.Nf3 Nbd7 9.0-0 0-0 10.a5 a6 11.b6 Re8 12.Nc3+=) 7...Bg6 8.g5 Nh5 9.Be2 (9.h4!? h6 10.d3+= Nd7 11.Be2 hg5 12.hg5+=; 9.Nf3 0-0 10.Nc3 Nd7 11.Be2 a6 12.Rg1+=) 9...Qg5-/+ 10.h4 Qh6 11.Nh3 (11.a5 Nd7 12.Nf3-/+) 11...Nf6 (11...Nd7 12.Ng5-+) 12.Ng5 (12.Bf6-/+) 12...0-0 13.f4 Ne8 14.h5 Bf5 15.Kf2 Nd7 16.d3 e5 17.Bg4 Bg4 18.Qg4 Rd8 19.Nd2 Qf6 (19...Nef6 20.Qf5-+) 20.Ndf3 Nc7 21.c4 (better is 21.h6 g6 22.Rhf1-/+) 21...Ne6?? (better is 21...h6!? 22.Nh3 Rfe8-+) 22.Rag1 (better is 22.cd5!? Ng5 23.Qg5 Qg5 24.fg5=) 22...Ng5 23.Ng5? Nb6 24.Ke2 Na4 25.Ba1 Rfe8?? 26.Nf3?? Re7?? 27.fe5 Be5+= 28.Ne5 Re5? 29.Rh3?? Nb6?? 30.Rf3+- Rde8 31.Rf6 Re3 32.Kf1 Re1 33.Kg2 R8e2 34.Rf2 Rf2 35.Kf2 Rg1 36.Kg1 Nd7 37.cd5 (37.cd5 Kf8 38.Qd7 f6 39.d6 h6 40.Qe7 Kg8 41.Bf6 gf6 42.d7 a5 43.d8Q; 37.Qg7) 1–0. Pierantoni,Mauro (1865) – Ricci,Leonardo, 6th ch–EU Arvier ITA, 2010.

5.c4 a5 6.a4 (6.d4 cd4 7.Bd4 Nf6=) 6...b6 (6...Nf6 7.cd5 Nd5 8.Nc3=) 7.Nf3 h6 (7...Nf6 8.Be2=) 8.Be2 (8.d4 Nf6+=) 8...Nd7 (8...Nf6 9.d4=) 9.0-0+= Ngf6 10.d3 (10.d4 dc4 11.Nbd2 c3 12.Bc3 Rc8+=) 10...dc4 11.dc4 Be7 (11...Qc7 12.Bd3 Bd3 13.Qd3=) 12.Nbd2 (12.Nc3 0-0=) 12...0-0 (12...Qc7 13.Ra3=) 13.Qb3 (13.Ra3 Bd6+=) 13...Qc7= 14.Rad1 Ne4 (14...Rad8 15.Qc3=) 15.Ne4 (15.Bd3 Nd2 16.Rd2 Bd3 17.Rd3 Rad8+=) 15...Be4= 16.Nd2 Bb7 (16...Bg6 17.f4=) 17.Bf3 Bf3 18.Nf3 Bf6 (better 18...Rad8+=) 19.Rd7 (better 19.Rd3+=) 19...Qd7-/+ 20.Bf6 gf6 21.Rd1 Qe7 22.Qb1 (22.Qc2 Rfd8-/+) 22...Rad8 23.Rd8 (23.Re1 Rd6-/+) 23...Rd8-+ 24.h3 Qd6 25.Qb2? (better 25.Qe4!?-+) 25...Kg7 (25...e5 26.Nh2-+) 26.g3 (26.Qa2 Qd1 27.Kh2 e5-+) 26...Qd1 27.Kg2 Qd3 (27...Qa4 28.Qe2-+) 28.Nh2?! (28.Qa2-+) 28...Qc4 29.Ng4 Qe4 (better 29...Qd5 30.e4 Qe4 31.Kh2 Qd4-+) 30.Kh2?? (30.f3 Qg6 31.e4-+) 30…Qf3 0–1. GuestMGSX – thesaltydog, freechess.org, 2018.

5.c4 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 b6 9.Nf3= Nd7 (9...Nf6 10.d4=) 10.Be2 (10.d3 Ngf6=) 10...Ngf6 11.Nh4 (11.d3 dc4 12.dc4 Be7=) 11...Be4 (11...Bb1 12.Qb1 dc4 13.Bc4=) 12.d3+= Bg6 13.0-0 Be7 (13...Bd6 14.f4+=) 14.cd5 ed5 15.Qb3 (15.f4 h6 16.Ng6 fg6+-) 15...0-0 (better 15...Qc7!?=) 16.Ng6+- hg6 17.Bf3 Qa8 (17...Re8 18.Bd5 Nd5 19.Qd5+-) 18.Nc3+- Ne5 19.Bd5 Qd8 (19...Qb8 20.Rd1+-) 20.d4 (better 20.Rd1+-) 20...Nd3? (better 20...cd4 21.ed4 Nd5 22.Nd5 Nd7+-) 21.Rd1 Nb4 (21...Nd5 22.Nd5 (22.Qd5?! Nb4 23.Qc4 cd4 24.Rd4 Qa8+-; 22.Rd3?! Nc3 23.Bc3 Bd6+-) 22...Nb4 23.dc5 Nd5 24.c6+- (24.Rd5?! Qa8 25.Bb2 bc5+-; 24.Qd5?! Qd5 25.Rd5 Ra8+-)) 22.dc5 Nfd5 23.Nd5 (23.Rd5?! Nd5 24.Nd5 Bc5=) 23...Nd5 24.c6 (24.Rd5?! Qa8 25.Bb2 bc5+-; 24.Qd5?! Qd5 25.Rd5 Ra8+-) 1–0. Anonymous – Anonymous, lichess.org, 2020.

5.c4 dc4 6.Bc4 Bd3 7.Qb3 Bc4 8.Qc4 Nd7 9.Nf3 Ngf6 10.a4 Nb6 11.Qc2 Be7 12.0-0 Rc8 (12...Nbd5 13.Ne5=) 13.e4+= 0-0 14.a5 Nbd7 15.d3 a6 16.b6 h6 (16...Nb8 17.Rd1=) 17.Nbd2+= Nb8 18.Nc4 Nc6 19.Rfd1 White prepares the advance e5 19...Nd7 20.d4 cd4 21.Bd4 Nd4 22.Rd4 (worse 22.Nd4 Ne5 23.Ne5 Rc2 24.Nc2 Qc8-/+) 22...Qe8 23.e5 Nc5 (23...f6 24.Qe4+=) 24.Nd6+/- Bd6 25.ed6 Nd7 26.Rc4 Rc4 27.Qc4 Qb8 28.Qc7 Rd8 29.Re1 Qc8 30.h3 Qb8 31.Ne5 Ne5 32.Re5 Qc8 33.Rc5 Qd7 34.Qd7 Rd7 35.Rc7 Rd6 36.Rb7 Rd1 37.Kh2 Ra1 (37...Rb1 38.Ra7 g6 39.Ra6+-) 38.Ra7 Ra5 39.b7 (39.b7 Rb5 40.Ra8 Kh7 41.b8Q Rb8 42.Rb8+-) 1-0. DEFFM – thesaltydog, freechess.org, 2021.

5.c4 dc4 6.Bc4 Nf6 7.d3 Be7 8.Nf3 h6 (8...Nbd7 9.e4 Bg4 10.h3=) 9.0-0 Nfd7 (9...0-0!?=) 10.Bg7+= Rg8 11.Bh6 Bh3 12.Ne1 Bf6 13.d4 cd4 14.ed4 Nb6 15.Na3 (15.Nd2 Rg6 (worse 15...Nc4 16.Nc4 Bg4 17.Qd2+=) 16.Bf4 Qd4 17.Bb8 Qa1 18.Qa1 Ba1=+) 15...Bd4 (15...Nc4 16.Nc4 Bd4 17.Rc1+-) 16.Rb1 Bc5 (better 16...Qh4 17.Rb3 Bc5=+) 17.Qf3?? (better 17.Qd8 Kd8 18.Rb3 Ba3 19.Ra3 Bg2 20.Ng2 Nc4 21.Rd1 Nd7 22.Rad3+=) 17...Bf5 18.Rd1 Qh4 19.Qb7 (19.Bc1 Rh8 (worse 19...Nc4 20.Nc4 Be4 21.Qc3+=) 20.h3 Ba3 (worse 20...Nc4 21.Nc4 Be4 22.Bg5 Qg5 23.Qe4+-) 21.Ba3 Bh3 22.gh3 Nc4 23.Qb7 Na3 24.Qa8 Qg5 25.Ng2 Qb5+-) 19…Qh6 (19...Qh6 20.Nb1 Bg4-+) 0–1. GuestMCFW – destat, freechess.org, 2017.

5.c4 d4 6.ed4 cd4 7.d3 (7.Qf3 Qb6=) 7...Bb4=+ 8.Nd2 Nf6 (8...e5 9.Qe2 f6 10.g4=+) 9.Ngf3= e5 (9...Bg4=) 10.Be2 (better is 10.Ne5!? Bc3 11.Qb3 Bb2 12.Qb2+=) 10...Nbd7 11.0-0 0-0 12.a3 Ba5 (12...Be7 13.Re1=+) 13.Nb3= Bc7 (13...Re8 14.Na5 Qa5 15.Nh4=) 14.Nfd2 Ne8 (14...Nb6 15.Nc5=) 15.Qc2 (15.f4 f6=) 15...b6 (15...a5 16.Ne4=) 16.Bf3 (16.f4 Qf6+=) 16...Rb8= 17.a4 (17.Bc6 Nc5 18.Nc5 bc5+=) 17...Nd6 18.Ba3 Re8 19.Rfe1 Re6 (19...Rc8 20.Ne4 Ne4 21.Be4 Be4 22.Re4=) 20.Bb4 Rh6 21.g3 Ne8 22.a5 Nef6 23.ab6+= ab6 24.Ra7 Ng4 25.Nf1 Nf8 26.Qe2 Rg6 27.Nbd2 Ne6 28.Ne4 Nf6 29.Nfd2?? Nf4-+ 30.Qd1 Nd3 31.Rc7 Nb4?? 32.Ra7-/+ Nd3 33.Re2 Nf4 34.Re1 Nd3 (better is 34...Rc8-/+) ½–½. Labahn,Thomas – Bremer,H, Verbandsklasse, 1989.

5.c4 Nf6 6.d4 (6.cd5 Nd5 (worse is 6...Qd5 7.Bf6 gf6 8.Nc3+=) 7.Nc3 Nd7=) 6...Bb1 7.Qb1 Qa5 8.Kd1 Nbd7 9.Bd3 (9.Qc2 cd4 10.Bd4 Rc8-/+) 9...cd4 (9...dc4 10.Bc4 Nb6-/+) 10.Bd4 (10.ed4!? dc4 11.Bc4-/+) 10...e5-+ 11.Bb2 dc4 12.Bc4 Nb6 13.Bd3 (13.Bf7 Kf7 14.Be5 Bb4-+) 13...Rd8 14.Be5 (14.Ke2 e4! 15.Bd4 (15.Be4?? Qb5 16.Bd3 Rd3-+) 15...ed3 16.Qd3-+) 14...Ne4 15.Qc2 (15.Nf3 Na4 16.Qc2 Rd3 17.Ke2 Qb5 18.Qd3 Nac3 19.Bc3 Nc3 20.Kd2 Qb2 21.Qc2 Ne4 22.Kd3 Nf2 23.Qf2 Qf2 24.Rhg1-+) 15...Rd3! 16.Kc1 (16.Qd3 Nf2 Double attack (16...Nf2 Decoy)) 16...Qe1 17.Kb2 (17.Qd1 Qd1 18.Kb2 Nc4) 17…Ba3# 0–1. Izmiestieva – Kriukovskich, Novosibirsk, 1973.

5.d4 c4-/+ 6.g4 (6.Ne2 Qa5 7.Nec3 Nf6-/+) 6...Qa5 (6...Bg6 7.h4 Qa5 8.Nc3-/+) 7.Bc3 Bb4 8.Qd2 Bc3 9.Nc3 Bg4 10.Rb1 Nd7 11.f3 Bh5 12.e4 Ne7 13.Nd5? (better is 13.Bg2-/+) 13...Qd2-+ 14.Kd2 ed5 15.ed5 (15.Bg2 Ng6 16.Re1 Nh4 17.ed5 Kd8-+) 15...Rc8 (15...Nd5?! 16.Re1 Kd8 17.Bc4-+) 16.Bh3 (16.c3 Nd5 17.Re1 Kd8-+) 16...c3 17.Kc1 Nd5 18.Ne2 (18.Bg4 Bg6 19.h4 h5-+) 18...Bf3 (18...Bf3 19.Re1 Be2 20.Re2 Kd8-+) 0–1. surftimm – chrisg, playchess.de, 2001.

5.Nf3 Nd7 =.

5.a4 a5 6.Nf3 h6 7.Be2 Nf6 8.0-0 Bd6 9.c4 dc4 10.Bc4 c5 (10...0-0=) 11.Nh4 (11.d4 Nbd7=) 11...Bg4 (11...Bh2 12.Kh1 Bb1 13.Rb1=+) 12.Bf6 (12.f3 Bh5=) 12...Bd1 (12...Qf6!? 13.Qg4 Qa1+=) 13.Bd8+= Ba4? (better 13...Bc2+=) 14.Nc3 Kd8 15.Na4 Nd7 16.Nf3 b6 17.d4 cd4 (17...Kc7 18.Rfc1+-) 18.Nd4 Bc5 19.Nc6 Kc7 20.Rfd1 Rhe8 21.Rd3 f5 (21...g6 22.Rad1 (22.Nc5?! Nc5 23.Rda3 g5+-) 22...Nf6 23.e4+- (worse 23.Nc5 bc5 24.Ne5 Rf8+-)) 22.Rad1 (22.Nc5?! Nc5 23.Rda3 Rec8+-) 22...Nf6 23.Ne5 Re7 24.Ng6 Ree8 25.Nf4 e5 26.Ne6 Re6 27.Be6 f4 (27...Re8 28.Bf5 e4 29.Rc3+-) 28.Rd7! Nd7 29.Rd7 (29.Bd7 fe3 30.Nc5 ef2 31.Kf2 bc5+-) 29...Kb8 30.Rd8 (better 30.Nc5 bc5 31.b6+-) 30...Ka7 31.Rd7 Kb8 32.Nc5 bc5 33.Rd8 (33.b6!? Ra6 34.Rd6 fe3 35.fe3 Rb6 36.Rb6 Kc7+-) 33...Ka7 34.b6! Kb6 35.Ra8 g5 (35...Kb5 36.Rb8 Kc6 37.Bc4+-) 36.Bc4 fe3 37.Ra6 Kc7 38.fe3 1–0. DEFFM – GuestBVML, freechess.org, 2018.

5.a4 a6 6.c4 ab5 7.ab5 Ra1 8.Ba1 cb5 9.cb5 Bc5?? 10.Nf3 (better 10.Bg7 d4 11.Nf3+-) 10...h6 (10...Nf6 11.Be2=) 11.Be2 (better 11.Bg7!? Rh7 12.Bd4 Bd4 13.Nd4 Bb1 14.Qb1+-) 11...Nf6= 12.0-0 0-0 13.d4 Bd6 14.Nbd2 (14.Bb2 Qe7=) 14...Ne4 (14...Nbd7 15.Qb3=+) 15.Ne4= Be4 16.Nd2 Qg5 (better 16...Bf5!?=+) 17.Ne4+= de4 18.Qc2 f5 (18...Qd5 19.f3 Qh5 20.g3+=) 19.Bc4 Rf6 20.Qb3 (better 20.Qa2 Qg6 21.Qa5+-) 20...Rg6? (better 20...Kf7!?+=) 21.Be6+- Kh7 22.g3 h5 (better 22...Rf6+-) 23.Qd5 h4 (23...Re6 24.Qe6 Qg6+-) 24.Qd6 hg3 25.fg3 (better 25.hg3 f4 26.d5 fg3 27.Qb8 Qh4 28.Qg8 Kh6 29.Qh8 Kg5 30.Qh4 Kh4+-) 25…Qh4 1–0. GuestBKKV – GuestCGVC, freechess.org, 2018.

5.a4 Nd7 6.Nf3= Ngf6 7.Nh4 (7.Nd4 Bg6=) 7...Bg6 (7...Bg4 8.f3 Bh5 9.Be2=+) 8.Ng6 fg6 (8...hg6 9.Nc3=) 9.c4 Bb4 10.Be2 0-0 11.0-0 Ne4 (11...Rc8 12.d4=) 12.Bf3 (12.d3 Nef6=) 12...Ndf6 13.Qc2 Ng5 14.Be2 a5 15.Nc3 Nfe4 16.Rad1 Rf7? (16...Nc3 17.dc3 Bd6 18.cd5 cd5 19.c4+-) 17.f3 (17.f4 Nc3 18.dc3 Bc5 19.fg5 Rf1 20.Rf1 Be3 21.Kh1 Qg5 22.cd5 ed5+-) 17...Nd6 (17...Nc3 18.Bc3 Bc3 19.dc3+=) 18.Na2 (18.h4 Nh3 19.gh3 Qh4+-) 18...Qe7 (18...cb5!? 19.f4 bc4 20.fg5 Qg5 21.Rf7 Nf7+=) 19.h4 Nf3 20.Rf3 Qh4? (20...Rf3 21.gf3 Qh4=) 21.Nb4 (21.Rf7 Nf7 22.c5 Ng5+=) 21...ab4 (better 21...Rf3 22.Bf3 ab4 23.cd5 Qc4 24.Qc4 Nc4 25.dc6 bc6+-) 22.Rdf1?? (better 22.Rf7 Nf7 23.bc6 bc6 24.cd5+-) 22...Rf3= 23.Rf3 (better 23.Bf3 Qc4 24.Qb1 Ra4 25.Qe1=) 23...Nc4 (23...Qe1 24.Bf1 Nc4 25.Rf4=+) 24.Rf4?? (24.g3 Qh5 25.bc6 bc6 26.d3+-) 24...Qe1-/+ 25.Bf1 Qd2 (25...g5 26.Rf2 cb5-/+ (worse 26...Nb2 27.Qb2 cb5 28.Qb4+-)) 26.Qd2+= Nd2 27.Rb4 (27.bc6 A) 27...Nf1 28.cb7 (28.Kf1?! bc6 29.Rb4 c5+-) 28...Rb8 29.Rb4 (29.Rf1?! Rb7 30.Bd4 e5 31.Be5 Ra7+-; worse 29.Kf1 Rb7 30.e4 de4+-) 29...Ne3 30.a5+-; B) 27...bc6 28.Rb4 c5+=) 27...Nf1?? (27...c5 28.Rf4 Nf1 29.Kf1-/+) 28.Kf1 (28.bc6 bc6 29.Kf1 c5+-) 28...Rf8 (better 28...c5!? 29.Rg4 c4-/+) 29.Ke2 (better 29.Rf4 Ra8 30.bc6 bc6 31.Rb4+-) 29...h5? (better 29...c5 30.Rg4 Ra8+=) 30.bc6+- bc6 31.Rb6 Rc8 (better 31...Ra8 32.Rc6 Ra4 33.Re6 Rg4+-) 32.Be5 Kf7 33.Rb7 (33.a5 Ra8 34.a6 g5+-) 33...Ke8 (33...Kf8 34.Bg7 (34.Rg7?! Ra8+-) 34...Kg8 35.a5+-) 34.Rg7 (34.Bg7?! Ra8+-) 34...Ra8 (34...c5 35.Rg6 Kd7 36.Rg7 Kc6 37.Re7+-) 35.Rg6 (better 35.Rg8 Kd7 36.Ra8+-) 35...Ra4 (35...Kf7 36.Rg7 Kf8+-) 36.Re6 Kd7 37.Rd6 Kc7 38.Rd5 Kb6 (38...Kb7 39.Rd7 Ka6 40.Rh7+-) 39.Rd6 (better 39.Bd4!? Kc7 40.Rh5 Kd7+-) 39...Rg4 40.g3 h4 (40...Rg5 41.Bf4 Ra5 42.Rh6+-) 41.gh4 (better 41.Rd4!? Rg5 42.Bf4 Rh5 43.gh4 c5 44.Rd6 Kb5+-) 41...Rh4 42.Bf4 Kb5 43.Kd3 Rh5 (43...c5 44.Rd8 Rh1 45.Rb8 Kc6 46.Rc8 Kb5 47.e4 Rh3 48.Be3+-) 44.Kd4 (44.e4 Rh3 45.Be3 Rh5+-) 44...c5 45.Kc3 c4 (45...Rh1 46.e4+-) 46.Kd4 Kb4 (46...Rc5 47.Rd8 Rf5 48.Rb8 Kc6 49.Kc4 Rc5 50.Kd4 Rd5 51.Ke4+-) 47.Rc6 Kb5 48.Rc4 Rh7 49.Rc5 Kb6 50.Rd5 (50.e4 Rd7 51.Kc4 Rf7 52.Bc7 Kb7+-) 50...Rf7 51.Be5 Kc6 52.e4 Rf3 53.Rc5 Kd7 (53...Kb7 54.Kd5+-) 54.Bh8 (54.Kd5 Rf7+-) 54...Ke6 55.e5 Rf1 56.Bf6 Re1 57.Rc6 Kd7 (57...Kf5+-) 58.Kd5 (better 58.Rd6 Kc8 59.Kd5 Rd1 60.Ke6+-) 58...Rd1= 59.Ke4 Kc6 60.e6 Re1 61.Kf5 Re6 62.Kg4?? (better 62.Ke6 Kc7=) 62...Rf6-+ 63.Kg5 Rf1 64.Kg6 Ra1 65.Kf5 Kd6 66.Ke4 Kc5 67.Kf5 Kc4 68.Ke6 Kd4 69.Kd6 Ke4 70.Ke6 Ra6 71.Kd7 Kd5 72.Kc7 (72.Ke7 Rh6 73.Kf7 Ke5 74.Kg7 Rf6 75.Kg8 Kf5 76.Kg7 Ke6 77.Kg8 Rg6 78.Kh8 Ke7 79.Kh7 Kf7 80.Kh8 Rh6) 72...Rh6 (72...Rf6 73.Kd7 Rf7 74.Ke8 Ke6 75.Kd8 Re7 76.Kc8 Kd6 77.Kd8 Re5 78.Kc8 Rb5 79.Kd8 Rb8) 73.Kb7 (73.Kd7 Rh7 74.Ke8 Rc7 75.Kd8 Kd6 76.Ke8 Rb7 77.Kf8 Ke6 78.Kg8 Kf6 79.Kh8 Kg6 80.Kg8 Rb8) 73...Kc5 (73...Rc6 74.Kb8 Kc5 75.Kb7 Kd6 76.Kb8 Rb6 77.Ka8 Kd7 78.Ka7 Kc7 79.Ka8 Ra6) 74.Ka7 (74.Kc7 Rd6 75.Kb7 Rd7 76.Kc8 Kc6 77.Kb8 Rd8 78.Ka7 Rc8 79.Ka6 Ra8) 74...Kb5 (74...Rh7 75.Kb8 Kc6 76.Ka8 Kb6 77.Kb8 Rh8) 75.Kb7 Rh7 (75...Rc6 76.Ka7 Rc7 77.Ka8 Kc5 78.Kb8 Kb6 79.Ka8 Rc8) 76.Kc8 Kc6 77.Kd8 Ra7 78.Ke8 Kd6 79.Kf8 Ke6 80.Kg8 Kf6 81.Kh8 Ra8 (81...Kg6 82.Kg8 Ra8) 82.Kh7 Ra7 (82...Ra7 83.Kh8 Kg6 84.Kg8 Ra8; 82...Rb8 83.Kh6 Rh8) 0–1. AhmedSultanov – MrZLi (1630), lichess.org, 2019.

5.a4 Nf6 6.Nf3 Bc5 (6...Bd6 7.Be2=) 7.Be2 0-0 8.Nh4 Bg6 9.0-0 Ne4 (9...a6 10.Ng6 fg6 11.d4=) 10.Ng6+= fg6 11.Nc3 Nc3 12.Bc3 cb5 13.ab5 Nd7 14.Qb1 Nb6 15.Qb2 Rf7 16.f4 (16.d4 Bd6+=) 16...g5 (16...Nc4 17.Qb3 Qc7 18.Bg4=) 17.Bh5 g6 (17...Rf4! 18.Bg7 Nc4+=) 18.Bg4+- Nc4 (18...Qe7 19.fg5 Nc4 20.Qb3+-) 19.Be6 Nb2 20.fg5 d4 21.Bb2 Qg5 (21...Qb6 22.Bf7 Kg7 23.c4+-) 22.Rf7 Re8?? (better 22...Qe5 23.Bb3 Kh8+-) 23.Rf5 (23.Rf5 Re6 24.Rg5+-) 1–0. onur604 (2320) – timandre (2105), lichess.org, 2020.

5.d4 c5 6.dc5= Bc5?? (better 6...Nf6=) 7.Bg7+- Nh6 (7...d4 8.Bh8 de3 9.fe3 Qh4 10.Ke2 Qc4 11.Ke1 Qh4 12.g3+-) 8.Bh8 (8.Bh6?! Qf6 9.Nd2 Qh6+=) 8...Nd7 9.Bd4 (9.Nf3 Rc8 10.Bc3 Nf6+-) 9...Qa5 10.c3 (10.Bc3 Qa4 11.Bd3 Bd6+-) 10...0-0-0 (10...Bb1 11.Rb1 (worse 11.Qb1 Bd4 12.ed4 Qc3 13.Ke2 Nf5+-) 11...e5 12.Bc5 Qc3 13.Qd2 Qd2 14.Kd2 Nc5 15.Rc1+-) 11.Bc5 (11.Qd2 e5 12.Bc5 Nc5+-) 11...Nc5 12.Qd4 (12.Nf3 Rg8+-) 12...b6 (12...Nb3 13.ab3 Qa1+-) 13.Qb4 Qb4 14.cb4 Nd3 15.Bd3 Bd3 16.Nf3 (16.Nc3 Rg8 17.g3 f6+-) 16...Kb7 (16...Rg8 17.Rg1 Bb5 18.a4+-) 17.Ne5 (17.Nc3 Rc8 18.Kd2 Bc4+-) 17...Be4 (17...Bb5 18.Nc3 f6 19.Nb5 fe5 20.Rc1+-) 18.0-0 (18.f3 Rc8 19.Nd2 Bc2+-) 18...Bf5 (18...f6 19.f3 Bg6 20.Ng6 hg6 21.Rd1+-) 19.Nc6 Rd7 20.Ne5 (20.a4 f6+-) 20...Rc7?? (20...Rd8 21.Rc1+-) 21.Nc6 (better 21.a4!? f6 22.Nc6 Nf7+-) 21...Bd3?? (21...Rd7 22.a4 f6+-) 22.Rd1 Bb5 23.Nd4 Ng8 (23...Ba4 24.Re1 Ng4+-) 24.Nb5 Rd7 25.N1c3 a6 26.Nd4 Rc7 27.Nce2 (27.Rac1 Ne7+-) 27...e5 (27...Ne7 28.Rac1+-) 28.Nf5 Rd7 (28...Nf6 29.Rac1 Rd7 30.f4 ef4 31.Nf4+-) 29.e4! Kc6 (29...de4 30.Rd7 Double attack (30.Rd7 Pinning; 30.Rd7 Deflection; 30.Nd6 Decoy)) 30.ed5 (30.Rac1 Kb7 31.Rd5 Rc7+-) 30...Kb5 (30...Kb7 31.f4 ef4 32.Nf4+-) 31.a3 (31.Rab1 a5 32.ba5 Ka5+-) 31...Ne7 32.Ne7 Re7 33.d6 Rd7 34.Nc3 Kc4 35.Ne4 (better 35.Nd5 Rd8 36.Rac1 Kb5 37.d7 Rd7 38.Nc3 Kc4 39.Ne4 Kb3 40.Rc3 Ka4 41.Rd7 a5 42.ba5 f6 43.a6 f5 44.a7 fe4 45.a8Q Kb5 46.Rd5) 35...h6 36.Rac1 Kb3 37.Rc7 Rd8 38.d7 (better 38.Rd3!? Ka4+-) 38...Ka3 39.Rc8 Rd7 40.Rd7 Kb4 41.Rf7 (41.Rd1 Kb3 42.Rb1 Ka3 43.Rc3 Ka4 44.Rc2 Ka3 45.Nc3 b5 46.Ra2) 41...a5 42.Rf6 (42.Rb7 h5 43.Rb6 Ka3 44.Rc1 Ka2 45.Nc3 Ka3 46.Ra1) 42...a4 (42...h5 43.Rb6 Ka3 44.Rc1 Ka2 45.Nc3 Ka3 46.Ra1) 43.Rb6 Ka5 (43...Ka3 44.Rc1 Ka2 45.Nc3 Ka3 46.Ra1) 44.Rbc6 (44.Rb2 a3 45.Ra8) 44...a3 (44...Kb4 45.Rb8 Ka3 46.Rc1 Ka2 47.Nc3 Ka3 48.Ra1) 45.Nc3 Kb4 (45...a2 46.Ra8 Kb4 47.Rb8 Ka3 48.Ra6) 46.Rc4 (46.Rb8 Ka5 47.Rb5) 46...Kb3 47.Ra4 (47.Nd5 Ka2 48.Rb8 h5 49.Nc3 Ka1 50.Rb1) 47...Kb2 48.Nd1 (48.Nd5 Ka1 49.Rb8 a2 50.Re4 h5 51.Re1) 48...Kb3 49.Ra3! Ka3 50.Rc5 e4 51.Rh5 Kb3 52.Rh6 Kc4 53.Rd6 Kc5 54.Rd8 Kc4 55.Re8 (better 55.Ne3 Kb5+-) 55...Kd4 56.h4 Kd3 57.Nb2 (better 57.Rd8 Kc4+-) 57...Kd4 58.h5 Kc3 59.Na4 Kd4 60.h6 Kd3 61.h7 Kd4 (61...Kc2 62.h8Q Kb3 63.Re4 Kc2 64.Qc3 Kd1 65.Nb2) 62.h8Q Kd5 63.Qe5 Kc6 (63...Kc4 64.Rb8 Kd3 65.Rb2 e3 66.Qd5) 64.Qe4 (64.Re7 e3 65.Rc7) 64...Kd6 65.Qe6 Kc7 66.Re7 Kd8 67.Qd7 1-0. onikichi – raspoutine, Rated Classical game, lichess.org, 2013.

5.c4?? Nf6=+ 6.Qb3 (6.cd5 ed5 7.Qf3 Be4 8.Bf6 gf6=) 6...0-0 (6...Nbd7 7.cd5 Nc5 8.Qd1 ed5 9.Qf3=+) 7.Nf3 Nbd7 8.d4 dc4 (8...c5 9.Be2-/+) 9.Bc4 Nb6 10.Be2 Be4 (10...Nfd5 11.Nbd2 a6 12.e4+/–) 11.0-0 (11.Nc3 Bg6=) 11...h6 (11...Bd5 12.Qc2 c6 13.Nc3 cb5 14.Nd5 Nbd5 15.Bb5=) 12.Nc3 Nbd5 (12...Bf5 13.Ba3=) 13.Ne4+= Ne4 14.Rfd1 Qf6 15.Bd3 Ng5 (15...Qf5 16.Rac1+=) 16.Ng5 (16.Ne5 Rad8+=) 16...Qg5 17.f4 (17.Ba3 Rfc8+=) 17...Qe7 18.Be4 c6 19.a4 Rab8 20.Bf3 Rfc8= 21.g3 f5 22.e4 fe4 23.Be4 Rf8 24.Bd5 ed5=+ 25.Re1 Qd7 26.Qe3 (26.Ba3 Rbe8=) ½–½. Hoelldorfer,August – Schneider,Martin, 7sen.BayEM Schney, 1995.

5.Nf3?? Nd7 6.Bg7 Qe7 7.Bh8 f6 8.Nd4 Bg6 9.Nc3 0-0-0 10.a4 Nh6 11.Nc6 bc6 12.bc6 Nb8 13.Qb1 Nc6 14.Ba6 Kd7 15.Qb5 Rh8 16.Bb7 Ke8 17.Bc6 Kf7 18.e4 d4 19.Ne2 Bc5 20.0-0 Ng4 21.Nf4 Qd6 22.g3 Ke7 (better is 22...a6 23.Qa6 Be4+-) 23.Nd3 Ne5 24.Ne5 Qe5 25.d3 h5 26.f4 Qd6 27.e5 (better is 27.f5!? Bf7+-) 27...fe5 28.fe5 Qe5 29.Rae1 Qg5?? (29...Qd6+-) 30.Qc4 Bf7 31.Rf7! Kf7 32.Qe6 Kg7 33.Qd7 Kg6 34.Re6 Kf5 35.Be4 Kg4 36.Rg6# 1–0. Wartenberg,Erwin – Brodt,Dominik, Rheinhessen–ch HT1 op, 1999.

5.Bg7 Bg4 6.Qc1 +-.

5.h3?? Nf6 6.Nf3 0-0 7.c4 dc4 8.Bc4 Be4 (8...a6 9.Nc3=+) 9.Nc3 Bf3 (9...Bg6 10.0-0=) 10.Qf3+= c6 11.a4 (11.0-0 Nbd7+=) 11...Nbd7 12.Ne4 Ne5 (12...Ne4!? 13.Qe4 Rc8=) 13.Nf6+- Qf6 14.Qf6 gf6 15.Bb3 (15.Be2!?+-) 15...cb5 (15...Nd3!? 16.Ke2 Nb2 17.bc6 bc6=+) 16.ab5= Nd3 17.Kd1?? (17.Ke2!? Nb2 18.Rhb1=) 17...Nb2?? (better 17...Nf2 18.Ke2 Nh1 19.Rh1 f5-+) 18.Kc2=+ Be5 (better 18...Bb4!? 19.Rhc1 Nd3 20.Kd3 Rfd8 21.Ke4 Rd2=+) 19.d4+- Bd6 20.Kb2 Rac8? (20...a6 21.ba6 ba6 22.Rhc1+=) 21.Rhc1 (better 21.Ra7!? Rc7 22.g3+-) 21...Ra8 22.Ra2 a6 23.ba6 ba6 24.Bc4 (24.Rc6 Bb4+-) 24...Rfb8 25.Kc3 a5 26.Rca1 Rc8? (26...Rb4 27.Bd3+=) 27.Kd3 (better 27.Ra5!? Ra5 28.Ra5+-) 27...Bb4 28.Bb5 (28.Rb1 f5+=) 28...Ra7 29.Rb1 Rac7 30.Rb3 (30.g4 Kf8+=) 30...f5= 31.Ba6 Ra8 32.Bb5 Rb8 (32...Rac8 33.g3=) 33.Bc4 (33.Ba4 f4=) 33...Rbc8 34.Ba6 Rb8?? (better 34...Ra8=) 35.Ra5!+- Ba5 36.Rb8 Kg7 37.Rb5 (37.Bc4!?+-) 37...Rc3+- 38.Ke2 Rc2 39.Kf1 (39.Kd1 Ra2 40.Bb7 Ra1 41.Kc2 Be1+-) 39...Bd8 (39...Rc1 40.Ke2 Rc2 41.Kd1 Ra2+-) 40.Rb8 Bh4 41.g3 Bf6 42.Be2 Rc1 43.Kg2 Rc2 44.Kf3 Kg6 45.Rb5 Ra2 46.d5 (46.Rc5 Be7 47.Rc6 Rd2+-) 46...ed5 (46...e5 47.Bc4 e4 48.Kg2+-) 47.Rd5+- Kg5 (47...Bc3 48.Rd6 f6 49.Rd8+-) 48.Bd3 Kh6 49.Rf5 Be7?? (49...Kg7+-) 50.Rf7 Bc5 (50...Ra3 51.Be4 Ra7 52.Rh7 Kg5 53.h4 Kf6 54.g4+-) 51.Rh7 Kg5 52.h4 (better 52.Rc7 Be3 53.Ke3 Kf6+-) 52...Kf6 53.g4 Ke5 54.g5 Ra8 (54...Ra3 55.g6 Rd3 56.g7+-) 55.g6 Rf8 56.Kg4 Rg8 57.g7 (better 57.h5 Bf8 58.f4 Kd5 59.h6 Bh6 60.Rh6+-) 57...Kf6 58.Kh5 Rg7 59.Rg7 (59.Rh6 Ke7+-) 59...Kg7 60.e4 (better 60.Kg4!? Kh6+-) 60…Bf2 0–1. AhmedSultanov – drratans, lichess.org, 2019.

5.Nf3 h6 6.Bd3 Bd3=+ 7.cd3 c5 (7...a6 8.ba6 Ra6 9.Qb3=+) 8.bc6= bc6 9.0-0 Ngf6 10.Qa4 Qb6 11.Bf6 Nf6 12.Rc1 Qb5 13.Nc3 Qa4 14.Na4 Rc8 15.Rab1 Bd6 (15...Ba3 16.Rc3 Bd6 17.Nd4+=) 16.Nd4+= 1–0. onur604 (2285) – killer81 (2190), lichess.org, 2020.

5.Nf3 h6 6.Be2 c5 7.c4 Ngf6 8.0-0 Be7 9.Nc3 0-0 10.d4 Nb6 (10...dc4 11.Bc4 Nb6 12.Bb3=) 11.cd5 Nbd5 12.Nd5 Nd5 13.Rc1 b6 (13...Rc8 14.Qa4+=) 14.Bd3 Bd3 15.Qd3 Nb4 16.Qb1 (better 16.Qb3 Qd5 17.Rc4+=) 16...Qd5? (better 16...Qd7 17.a3 Nd5 18.dc5 bc5+=) 17.a3+- Na2 18.Rcd1 Qb3 19.Nd2 (19.Nd2 Qb5 20.Qa2+-) 1–0. DEFFM – TKEGigant, freechess.org, 2018.

5.Nf3 c6 6.a4 (6.Nd4 Nh6 7.Nc3 Kf7+=) 6...a6 (6...Bc5 7.Nd4+=) 7.c4 (7.Nd4 Nh6+/–) 7...dc4 (7...ab5 8.cd5 cd5 9.Bb5 Kf7 10.Nc3+=) 8.Bc4+/– ab5 9.ab5 Ra1 10.Ba1 Bd6 (10...cb5 11.Bb5 Kf7 12.Nc3+/–) 11.0-0 (11.Nd4 Nh6+-) 11...Ne7 (11...cb5 12.Bb5 Nc6 13.Nh4+/–) 12.Nd4 Qd7 (12...cb5 13.Nb5 Nbc6 14.N1c3+-) 13.Qb3 Nd5 (13...Kf7 14.e4! Bg4 15.h3+-) 14.Nc3 (14.Nf5 ef5 15.bc6 bc6+-) 14...Nc3 (better is 14...Bg6+-) 15.Bc3 (15.Qc3?! Be5 16.Qa5 Bd4 17.Bd4 Be4+/–; 15.dc3?! cb5 16.Nb5 Qe7+-) 15...Ke7 16.Ra1 g6 17.Ra7 c5 (17...Rc8 18.f4+-) 18.Nc6! (worse is 18.Nf5 gf5 19.f4 Rf8+-) 18...Kf7 (18...bc6 19.Rd7 Pinning (19.Rd7 Deflection); 18...Nc6 19.bc6 Double attack) 19.Na5 Bc7 20.Rb7 (better is 20.b6 Nc6 21.Nc6 Bh2 22.Kh2 Qc6+-) 20...Qd6 21.g3 (21.Rc7 Qc7 22.f3 Nd7+-) 21...Be4 (21...Nd7 22.Nc6 Rc8 23.f3+-) 22.Be6 Kg7 23.Ra7 (better is 23.b6 Bb7 24.bc7+- (24.Nb7?! Qb6 25.Qd5 Qc6+/–)) 23...Qb6 24.Rc7! Qc7 25.Qc4 (25.b6 Qd6 26.b7 Rd8+-) 25...Ba8 (25...Qd6 26.Qe4 Re8 27.Qc4 Qe6 28.Qc5+-) 26.Bh3 (better is 26.d4 Nd7 27.d5+-) 26...Nd7?? (26...Re8+-) 27.d4 (better is 27.Bd7 Qd7 28.Bf6 (28.Qc5?! Rc8 29.Qb4 Qd5=) 28...Kf6 29.Qc3 Kg5 30.Qh8+-) 27...Qd6+/– 28.Bg2 Rc8 (better is 28...cd4!? 29.Bb4 Qb6 30.Ba8 Ra8+/–) 29.Ba8 Ra8? (better is 29...Nb6 30.dc5 Qd1 31.Qf1 Qf1 32.Kf1 Rc5+/–) 30.Nb7 Qc7 (30...Qb6 31.Nc5 Qd6 32.Ne6 Kh8 33.d5+-) 31.Nc5 Qc8 32.Qb4 (32.Qe6 Nc5 33.Qe7 Kg8 34.dc5 Qf8 35.Qe6 Qf7+-) 32...Nb6 (32...Qe8+-) 33.Na6?? (better is 33.e4 Qg4 34.d5 Qd1 35.Kg2+-) 33...Nd5-+ 34.Qd6 ½–½. Kasachev,Yuriy – Baymagambetov,Dauren, Astrakhan Open, 2011.

5.Nf3= Bd6 6.Be2 c6 (6...e5 7.0-0=) 7.c4 (7.Nd4 Nh6+=) 7...Ne7 (7...dc4 8.Bc4 cb5 9.Bb5 Nc6 10.Nd4=) 8.0-0 (8.Nd4 Be5=) 8...Qc7 (8...dc4 9.Bc4 cb5 10.Bb5 Nbc6 11.Nd4=) 9.d4 dc4 10.Bc4 Nd5 (10...cb5 11.Bb5 Nbc6 12.Nbd2=) 11.Nbd2+= Bg4 (11...Nb6 12.Be2+=) 12.h3 Bh5 13.Qb3 Bf7 (13...Qd7 14.e4 Nf4 15.Rfe1+=) 14.a4 (14.Ne4 Be7+/–) 14...Nd7 (14...0-0 15.Rfc1+=) 15.a5 (15.Ne4 0-0+/–) 15...0-0 16.Rfc1 (16.Ne4 cb5 17.Bd5 ed5 18.Nd6 Qd6+-) 16...c5 (16...a6 17.b6 Qd8 18.Ba3 Ba3 19.Ra3+/–) 17.Ne4+/– b6 (17...Rac8 18.Ba3+/–) 18.a6 (18.Nd6 Qd6 19.e4 Nf4+/–) 18...Rac8 (18...Be7 19.Nc3 Qd6 20.Rd1+=) 19.Ne1 (19.Nd6 Qd6 20.e4 Nf4+/–) 19...Qb8 (19...Be7 20.Nd3+=) 20.Ba3 (20.Nd6 Qd6 21.e4 Nf4+=) 20...Be7 21.Nd3 cd4 22.Be7 Ne7 23.Be6 Rc1 24.Rc1 de3 25.Bf7 Rf7 26.fe3 Ne5?? 27.Nf4 h6? 28.Qe6+- N7g6 29.Rc8 (29...Qc8 30.Qc8 Kh7 31.Nd6+-) 1–0. Grodecki,Justina (1775) – Gerhardt,Sabine (1790), BL2 South, 2001.

5.Nf3= e5 6.c4 =.

5.a4 Nbd7 6.Nf3 c5 7.Be2 Bd6 (7...Bg4 8.a5=) 8.c4 (8.Nh4 Bg6=) 8...0-0=+ 9.Na3 Rc8 (9...Re8 10.Nh4=+) 10.0-0 (10.Nh4 Be5 11.Be5 Ne5 12.Nf5 ef5=) 10...Re8 (10...Qc7 11.d3=) 11.d4 (11.Nh4 Be5 12.d4 cd4 13.ed4 Bh2 14.Kh2 Ng4 15.Bg4 Qh4 16.Bh3 dc4=) 11...cd4=+ 12.ed4 (12.Nd4 Be4=+) 12...Ba3 13.Ra3 dc4 14.Rc3 (14.Qa1!?=+) 14...Nb6-/+ 15.Ne5 (15.a5!? Nbd5 16.Rc4 Qa5 17.Rc8 Rc8 18.Qa1 Qa1 19.Ra1-+) 15...Ne4-+ 16.Rc1 c3 17.Ba1 Nd2 (17...f6 18.Nf3 c2 19.Rc2 Rc2 20.Qc2-+) 18.Bc3 Nf1 19.Bf1 Nd5 20.Nc4 (20.Bd2 Qh4 21.Be3 Be4-+) 20...Nc3 21.Rc3 Re7 22.g4 (22.h3 Rd7-+) 22...Be4 23.Re3 Bd5 24.Ne5 Rec7 25.Rh3 (25.Re1 Qg5 26.Qe2 f6-+) 25...Be4 (better 25...Rc1 26.Qd3 h6 27.Qd2-+) 26.Re3 (26.Qd2 Qd5 27.Qf4 f6-+ (worse 27...Qd4 28.Rd3 Qa1 29.Qe4-+)) 26...Bc2 (better 26...Rc1 27.Qd2 R8c2 28.Qc1 Rc1 29.Re4 f5-+) 27.Qd2 Ba4 28.Rh3?! (28.Ra3 Bc2-+) 28...Rc2 (28...Rc1!? 29.Qf4 Qf6 30.Qf6 gf6 31.Ra3 Bb5 32.Nd3-+) 29.Qd3 g6 (29...h6 30.Qe4 Rc1 31.Kg2-+) 30.Qf3? (better 30.Nf7 Qd5 31.Nh6 Kh8 32.Qf3 Qf3 33.Rf3-+) 30...f6 31.Nf7 (31.Qb7 R8c7 (31...fe5?? 32.Qh7 Kf8 33.Qh8 Ke7 34.Rh7 Kd6 35.Qe5) 32.Qa6 Qd4-+ (32...fe5 33.Qe6 Kg7 34.Qe5 Kg8 35.Qe6 Rf7 36.Rh7-/+)) 31...Qe7 (better 31...Qd4!? 32.Nh6 Kg7 33.g5-+) 32.Nh6 Kg7 33.Qf4 (33.g5 Rc1 34.Kg2 fg5-+) 33...R2c3 (better 33...Rc1 34.Kg2 Qd8 35.Nf5 ef5 36.Qh6 Kf7 37.Qh7 Kf8 38.Qb7 R8c7 39.Rh8 Kg7 40.Rd8 Rb7 41.gf5 g5-+) 34.f3 (34.Rc3 Rc3 35.d5 ed5 36.Qa4 Kh6 37.Qa7-+) 34...e5 (better 34...Rc1 35.g5 Bb5 36.gf6 Qf6 37.Qf6 Kf6 38.Ng4 Kg7 39.Ne3 Bf1 40.Nf1-+) 35.de5 Qc5 (35...Qe5!? 36.Nf5 gf5 37.Qh6 Kf7 38.Qh7 Ke6 39.Qf5 Qf5 40.gf5 Kf5 41.Rh4 Rg8 42.Kf2 Rc2 43.Ke3 Re8 44.Kd4 Rd8 45.Ke3 Rc3 46.Kf2-+) 36.Kh1 Qe5 37.Nf5 gf5 38.Qh6 Kf7 39.Qh7 Ke6 40.Qb7 fg4 (better 40...Rc1 41.Qa6 Kf7 42.Qa7 R8c7-+) 41.Rh7 R8c7 42.Qa6 Qd6 (42...Qd6 43.Qa4 Rh7 (43...gf3 44.Qg4 Kd5 45.Rh5 Qe5 46.h4+-) 44.Qe4 Qe5 45.Qh7 Rf3 46.Bc4 Kd6 47.Qa7 Qe3 48.Qe3 Re3-+) 0–1. Tanisik,Cengiz – Temel,Mustafa, Turkish Championship Club, 2019.

5.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6 5.b5).

5.c4 c6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5).

5.d4 Bd6 6.Nf3 Bg4 7.Be2 Bf3 8.Bf3 0-0 9.0-0 c6 10.a4 a6 11.Be2 ab5 12.ab5 Ra1 13.Ba1 Ne4 (13...cb5 14.Bb5 Qa5 15.Nc3+=) 14.c4 dc4 15.Bc4 cb5 16.Bd3 Nf2?? (better is 16...Nf6=) 17.Rf2+- (17.Kf2?! Qh4 18.Ke2 Qg4 19.Ke1 Qg2+/–) 17...Qg5 18.Qf3 Nd7 19.Nd2 f5 20.e4?? (better is 20.Bb5 Nf6 21.Nc4+-) 20...fe4-/+ 21.Ne4 (21.Qe4 Bh2 22.Kh2 Rf2+=) 21...Rf3-+ 22.Ng5 Rd3 23.Ne6 Rd1 24.Rf1 Bh2! 25.Kf2 (25.Kh2 Rf1 Deflection (25...Rf1 Overloading)) 25...Bg3! 26.Ke2 (26.Kg3 Rf1 Deflection) 26...Rf1 27.Kf1 b6 28.d5 Nf6 29.Nd4? (better is 29.Bf6 gf6 30.Ke2-/+) 29...Be5-+ (worse is 29...Nd5 30.Nf5 Bf4 31.Bg7-+) 30.d6 Bd6 (30...Kf7 31.Ke2-+) 31.Nb5 Bc5 32.Be5 Nd5 33.Ke2 Kf7 34.Na7 h5 35.Nc6 g5 36.Nd8 Ke7 37.Nb7 Ke6 38.Nc5 Ke5 (38...bc5 39.Bb2-+) 39.Nb3 (39.Nd7 Ke6 40.Nf8 Kf5-+) 39...b5 40.Kf3 b4 41.Nc5 (41.Na5 Kd4-+) 41...Kf5 42.Nd3 b3 43.Nb2 h4 44.g3 g4 45.Kg2 h3 46.Kf2 Nc3 47.Kg1 Ke4 48.Nc4 Kd4 (48...Kd4 49.Nb2 Nd5-+) 0–1. Mezgo,Victor – Vechkanov,Valery (2025), Borisoglebsk Bocharov Memorial 8th, 2008.

5.Be2 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5).

5.Nf3 Bd6 6.c4 dc4 7.Bc4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5 Bd6).

5.Nf3 Bd6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Bd6).

5.Nf3 Nbd7 6.a4 Bd6 7.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6 7.a4).

5.Nf3 h6 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6).

5.Nf3 h6 6.Be2 Be7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.Be2 h6).

5.f4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.f4 e6 5.b5).

5.h3 Nbd7 6.a4 Be7 7.Nf3 0-0 8.c4 (8.Be2 Ne4=) 8...c6 (8...Bb4 9.Ba3 Ba3 10.Na3=+) 9.cd5 (9.Nd4 Bb1 10.bc6 Be4 11.cb7 Rb8=+) 9...cd5=+ (worse 9...ed5 10.bc6 Qb6 11.cb7 Qb7 12.Ba3+=) 10.Nc3 Rc8 11.Be2 Nc5 12.Rc1 (12.d3 Qa5 13.0-0 Bd6=+) 12...Nd3 (12...Qa5 13.Ra1-/+) 13.Bd3=+ Bd3 14.Ne5 Bc4 (14...Bf5 15.g4 Be4 16.f3=+) 15.Nc4 (15.d3!? Qd6 16.dc4 (worse 16.Nc4 dc4 17.Ne4 Ne4 18.de4 Qb4 19.Bc3 Qa3=+) 16...Qe5 17.Nd5 Bb4 18.Nb4 Qb2 19.Nd3+=) 15...Rc4 (15...dc4 16.Qf3 Nd7 17.0-0=+ (17.Qb7?? Nc5 18.Qf3 Nd3 19.Ke2 Nb2-+)) 16.0-0 Qd6 17.d3 Rc7 18.e4 de4 (18...Rfc8 19.Qb3=+) 19.Ne4= Ne4 (19...Rc1 20.Qc1 Qd3 21.Nf6 Bf6 22.Bf6 gf6 23.Rd1=) 20.de4 Qd1 (20...Rc1 21.Qc1 Qb4 22.Qc2=) 21.Rfd1+= Rc1 22.Rc1 Rd8 23.Rc7?? (better 23.g3 Bd6 24.Rd1+=) 23...a6 (better 23...Rd1 24.Kh2 Bd6 25.g3 Bc7-+) 24.Rb7 (24.Re7 ab5 25.ab5 f6 26.Rb7 Rd3+-) 24...Kf8 (24...Bc5 25.ba6 Ra8+-) 25.ba6 f6 (25...Bc5 26.a7 Ba7 27.Ra7 Rb8 28.Ba3 Kg8+-) 26.a7 Bc5 (26...Rd1 27.Kh2 Rd8+-) 27.Rc7 (better 27.Ba3! Ba3 28.Rb8+-) 27...Ra8 (27...Bd6 28.Rd7! Ra8 29.Rd6 Ra7 30.Rd4+-) 28.Rc5 Ra7 29.Rc6 (29.a5 e5+-) 29...Kf7 (29...Ra4 30.f3 Kf7 31.Rc7 Kg6 32.Kh1+-) 30.Bc3 (better 30.Rc4!? e5+-) 30...Ra4 31.f3 e5 32.Rc7 Kg6 33.Kh2 h5 34.Rb7 Ra8 35.Bb4 Rg8 36.Bd6 Kg5 (36...h4 37.Rb6 Kh5 38.Rb5+-) 37.Re7 (37.g3 Kg6+-) 37...h4 38.g3 hg3 39.Kg3 g6 (39...Kh5+-) 40.h4 (40.Rh7 Rd8 41.h4) 40...Kh5 (40...Kh6 41.Rf7+-) 41.Re6 (41.Rh7) 41...g5+- 42.hg5 (better 42.Rf6 gh4 43.Kh2 Rg5+-) 42...Rg5 43.Kf2 Kg6 44.Ke3 Rh5 (44...Kf7 45.Re7 Kg6+-) 45.Be7 (45.Be5 Re5 46.Re5 fe5 47.Kd3+-) 45...Kf7+- 46.Rf6 Ke7 47.Rf5 (47.Rg6!?+-) 47...Rf5= 48.ef5 Kf6?? (better 48...Kf7=) 49.Ke4+- Kf7 50.Ke5 Ke7 51.f4 Kf7 52.f6 Kf8 53.Ke6 (53.Ke6 Ke8 54.f7 Kf8 55.f5 Kg7 56.Ke7 Kh6 57.f8Q Kg5 58.f6 Kg4 59.Qc8 Kg5 60.f7 Kf4 61.f8Q Kg3 62.Qc3 Kg4 63.Qff3 Kg5 64.Qcf6) 1–0. AleksandrNekhoroshik (1710) – Cerma (1710), lichess.org, 2020.

5.h3 Nbd7 6.c4 Qe7 (6...Bd6 7.cd5 ed5 8.Nf3=+) 7.cd5 (7.Ba3 Qd8=) 7...Nd5=+ 8.g4 (8.Nf3 Rd8=+) 8...Bg6 (better 8...Be4 9.f3 Qh4 10.Ke2 Bg6-/+) 9.Bg2? (9.Nf3 0-0-0 10.a3 e5=+) 9...0-0-0 (9...Nb4 10.Kf1 Bd3 11.Ne2-+) 10.Nf3 (10.Bd5 ed5 11.Bd4 Nc5-/+) 10...Qb4 (10...Nb4!? 11.0-0 Bd3 12.a3 Bf1 13.Qf1-+) 11.Bd4-/+ Qb5 12.Ba7?? (12.Nh4!?-/+) 12...b6 (12...Nb4 13.Nc3 Qa6 14.Bf1 Qa7 15.Nb5-+) 13.a4? (13.Qe2 Qa5 14.Bb6 N7b6-+ (worse 14...Qb6 15.0-0-+; worse 14...cb6 15.0-0-+)) 13...Qa5 (better 13...Qb2 14.Bf1 Kb7-+) 14.Bb6 Qb6 15.Nc3? (15.Na3-+) 15...Nc3 16.dc3 Nc5 17.Qe2 Nd3 18.Kf1 Qa5 (better 18...Nf4! 19.a5 Qc6 20.ef4-+) 19.Kg1 Qc3 20.Bf1 (20.Rd1-+) 20...Qa1 21.Kg2 (21.Nh4 Qa4 22.Kh2 Be4-+) 21...Qa4 22.Nh4 (22.Kg1 Kd7-+) 22...Be4 23.f3 Bb7 24.e4 Be7 (24...Nf4 25.Kg3 Ne2 26.Be2-+) 25.Kg3 Bh4 (better 25...Bd6 26.Kg2 Nf4 27.Kf2 Ne2 28.Be2 Qd4 29.Kg2-+) 26.Kh4 f6 (26...Qd4 27.Qh2 Nf2 28.Bc4 Nh1 29.Be6 fe6 30.Qf4 Rd5 31.Qg3 g5 32.Kh5 Ng3 33.Kh6 Qf6) 27.Qc2 (27.Qe3-+) 27…Qc2 (27...Qc2 28.Be2 Qe2 29.Rg1 Qf2 30.Rg3 h5 31.gh5 g5 32.Kg4 Ne5) 0-1. poputchik – jvander, Rated Classical game, lichess.org, 2013.

5.h3 Be7 6.Nf3 0-0 7.Nh4 Bg6 8.Ng6 hg6 (8...fg6 9.Be2=) 9.c4 dc4 10.Bc4 c6 11.0-0 (11.Qf3 a6 12.a4 Qd7=) 11...cb5= 12.Bb5 Nc6 (12...a6 13.Be2=) 13.d4 a6 14.Be2 b5 15.a3 Rc8 16.Nd2 Qc7 (16...Na5 17.Rb1+=) 17.e4 (17.a4!?+=) 17...Rfd8 18.e5 Nd5 Black plans b4 19.Rc1 Qb6 Black plans b4 20.Ne4 (20.Nb3 a5=) 20...a5 Black prepares the advance b4 (20...Nc7 21.Bd3=+) 21.Nc5 (21.Bf3 b4 22.a4 Rc7=) 21...b4 (21...Ne5 22.Qd2 Nc6 23.Rfe1-/+) 22.Bf3 (22.ab4 Ndb4 23.Qa4 Nd4 24.Bd4 Bc5 (24...Rd4?! 25.Nb3 Rdd8 26.Qa5 Qa5 27.Na5=) 25.Bc5 Rc5 26.Rc5 Qc5-/+) 22...Bc5 (22...Ne5 23.Bd5 Rd5 24.Na4 Rc1 25.Qc1-/+) 23.dc5=+ Qb8 24.Qa4 (24.Qe1 ba3 25.Ba1 Qb4=+) 24...ba3 (24...Ne5 25.Be5 Qe5 26.Rfd1-/+) 25.Ba3 (25.Qa3!? Nf4 26.Rc2 Ne5 27.Be5 Qe5 28.Qa5=) 25...Qe5=+ 26.Rfd1 Qf5 (26...Rd7 27.Rd3=+) 27.Kh2 (27.Bb2=) 27...Qf4 (better 27...Ne5!? 28.Bd5 ed5-/+) 28.Qf4= Nf4 29.Rd8 (better 29.Bc6 Rd1 30.Rd1 Rc6 31.Rd8 Kh7 32.Rd7+=) 29...Rd8?? (better 29...Nd8 30.Kg3 Nd3=+) 30.Bc6+- Rc8 (30...Ne2 31.Rc4 Rd3+-) 31.Bd7 Rc7 32.c6 Nd3 (32...Nd5 33.Bd6 Ra7 34.c7 Nc7 35.Rc7+-) 33.Rc3 (better 33.Bd6 Rc6 34.Rc6 Nf2+-) 33...Nb4 34.Bb4 (34.Rc4!? Nc6 35.Bc6 Rc8+-) 34...ab4 35.Rb3 Kf8 36.Rb4 Ke7 37.Rb7 Kd6 38.Rc7 Kc7 39.Kg3 e5 40.h4 f6 41.f4 (41.Kg4 Kd6+-) 41...ef4 42.Kf4 Kd6 43.g4 Kc7 44.g5 f5 45.Ke5 Kd8 White now must not overlook the idea Bxf5 46.Kd6 f4 47.c7 1-0. glorij – ostap, Rated Classical game, lichess.org, 2013.

5.Be2 Bb4?? 6.Bg7 f6 7.Bh8 Qa5 (7...e5 8.Nf3+-) 8.Bh5 (8.Bg4 Be4 9.f3 Bf5 10.Bf5 ef5+-) 8...Ke7 9.c3 Bd6 10.Nf3 Nd7 11.Nd4 Bg6 12.Bg6 hg6 13.Qg4 e5 (13...Nf8 14.Bg7 e5 15.Bf8 Kf8+-) 14.Qe6 Kf8 15.Nf3 (better is 15.Qd7!? Ne7+-) 15...Nc5 (15...Qc7 16.Nh4 Ne7 17.Bf6+-) 16.Qd6 Kf7 17.0-0 (better is 17.Bf6!? Nd3 18.Ke2 Nf6 19.Ng5 Kg7 20.Qe7 Kh6 21.Nf7 Kg7 22.Ne5 Kh6 23.Nf7 Kg7 24.Nd6 Kh6 25.Qf6 Qc7+-) 17...Ne4 (17...Rd8 18.Ne5 fe5 19.Qe5 Ne6+-) 18.d3 (better is 18.Qd7 Ne7 19.Qh3+-) 18...Nd6-+ 19.a4? (19.Nbd2 Qc3 20.Nb3 Ne7-+) 19...Ne7 (19...e4 20.de4 Ne4 21.c4-+) 20.Bf6?! (20.Ne5 fe5 21.Be5-+) 20...Kf6 21.d4 e4 22.Nh4 Rh8 23.g3 Nef5 24.Ng2 Qc7 25.Nf4 Qh7 26.h4 g5 27.Nd5 cd5 28.Kg2 gh4 29.Nd2 hg3 30.fg3 Qh2 0–1. Slooooowly – jakesh, Live Game Caissa's Web, 2004.

5.Be2 Bb4?? 6.Bg7 Qg5 7.Bh8 Qg2 8.Bf3 +-.

5.Be2 Nf6 6.c4 (6.b5 cb5 7.Bb5 Nc6=+) 6...Ne4 (6...Bb4 7.cd5 Qd5 8.Nf3-/+) 7.d3 (7.c5 Be7=) 7...Nf6 (7...Bb4 8.Kf1 Nf6 9.cd5 cd5 10.Nf3-/+) 8.Nf3 (8.Qb3!?=) 8...Bb4 9.Nc3 (9.Nbd2-/+) 9...a5 (9...dc4!? 10.dc4 Qa5-+) 10.0-0 Bg6 (10...dc4 11.dc4 0-0 12.a3=+) 11.Nh4 (11.cd5 ed5 12.a3 Bd6=) 11...Be7 (11...dc4 12.dc4 Qc7 13.a3=+) 12.Nf3 (12.cd5 ed5 13.Rb1 Qd6=) 12...Bd6 (12...dc4 13.dc4 Nbd7 14.Bd3-/+) 13.cd5= cd5 14.e4 (14.Nb5 Nc6=) 14...de4 15.Ne4 Be7 16.Qa4 Nc6 17.Ba3 (17.Ne5!?=+) 17...Ba3 18.Qa3 (18.Nf6 Qf6 19.Qa3 Qe7-/+) 18...Qe7 (18...Ne4!? 19.de4 Be4-/+) 19.Nf6 Qf6 20.Nd2 (20.Rab1!? Qe7 21.Qb2=+) 20...Qe7 21.Qb3 (21.Qb2 0-0-/+) 21...Rb8 (21...Nd4 22.Qd1-+) 22.Qb6 0-0 23.Bf3 Ne5 24.Be4 Be4 (24...Nd3 25.Bg6 fg6 26.Rad1-/+) 25.de4 Nd7 (25...a4!?-/+) 26.Qa5= Rfd8 27.Nc4 (27.Nf3 Qc5 28.Qd2 Ne5=) 27...b6 (27...b5!? 28.Ne3 b4=+) 28.Qb5= Nc5 29.Ne5 Qd6 (better is 29...Rbc8!? 30.Rad1 Qc7=+) 30.Nc6+= Qd7 (30...Ne4 31.Nd8 Rd8 32.Rac1+/–) 31.a4 (31.Rab1 Ne4 32.Nb8 Qb5 33.Rb5 Rb8+-) 31...Rbc8 (better is 31...Ne4!? 32.Nb8 Qb5 33.ab5 Rb8+/–) 32.Nd8+- Rd8 33.Qb6 Nd3? (33...Ne4 34.a5 Nc3+-) 34.a5 (better is 34.Rfd1 f5 35.ef5+-) 34...h6 (34...Qe8+-) 35.a6 Ra8 36.Qb7 (better is 36.Rfd1 Kh7+-) 36...Qe8 37.a7 Nc5 38.Qb6 Ne4 (38...Nd7 39.Qc6+-) 39.Rfb1 Nf6 40.Qb8! Nd7 (40...Qb8 41.Rb8) 41.Qe8 Re8 42.a8Q (better is 42.Rb7+-) 42...Kf8 (42...Ra8 43.Ra8 Kh7+-) 43.Qa3 Kg8 44.Rb7 Ne5 45.f4 Nc6 46.Rc1 Nd4 47.Rcc7 Ne2 48.Kf2 Rf8 49.Qe7 Nf4 50.g3 Nd5 51.Qd7 Nc7+- 52.Rc7 (52.Qc7 h5+-) 52...g5 (52...Kh8 53.Qd6 Kg8 54.Qf4+-) 53.Rc8 (53.Qd4 e5 54.Qe5 Rd8+-) 53...g4 (53...Rc8 54.Qc8 Kg7 55.Qd8+-) 54.Rf8 Kf8 55.Ke3 Kg7 56.Kf4 h5 57.Qe7 e5 58.Ke5 h4 59.Qf6 Kf8 60.Qh4 Ke8 61.Qg4 Kd8 62.Kd6 f6 63.Qd7# 1–0. Scirocco – NewMembership, Live Game Caissa's Web, 2004.

5.Be2?? Nf6 6.c4 (6.b5 cb5 7.Bb5 Nc6=+) 6...Ne4 (6...Bb4 7.cd5 Qd5 8.Nf3-/+) 7.d3 (7.c5 Be7=) 7...Nf6 (7...Bb4 8.Kf1 Nf6 9.cd5 cd5 10.Nf3-/+) 8.Nf3 (8.Qb3!?=) 8...Bb4 9.Nc3 (9.Nbd2-/+) 9...a5 (9...dc4!? 10.dc4 Qa5-+) 10.0-0 Bg6 (10...dc4 11.dc4 0-0 12.a3=+) 11.Nh4 (11.cd5 ed5 12.a3 Bd6=) 11...Be7 (11...dc4 12.dc4 Qc7 13.a3=+) 12.Nf3 (12.cd5 ed5 13.Rb1 Qd6=) 12...Bd6 (12...dc4 13.dc4 Nbd7 14.Bd3-/+) 13.cd5= cd5 14.e4 (14.Nb5 Nc6=) 14...de4 15.Ne4 Be7 16.Qa4 Nc6 17.Ba3 (17.Ne5!?=+) 17...Ba3 18.Qa3 (18.Nf6 Qf6 19.Qa3 Qe7-/+) 18...Qe7 (18...Ne4!? 19.de4 Be4-/+) 19.Nf6 Qf6 20.Nd2 (20.Rab1!? Qe7 21.Qb2=+) 20...Qe7 21.Qb3 (21.Qb2 0-0-/+) 21...Rb8 (21...Nd4 22.Qd1-+) 22.Qb6 0-0 23.Bf3 Ne5 24.Be4 Be4 (24...Nd3 25.Bg6 fg6 26.Rad1-/+) 25.de4 Nd7 (25...a4!?-/+) 26.Qa5= Rfd8 27.Nc4 (27.Nf3 Qc5 28.Qd2 Ne5=) 27...b6 (27...b5!? 28.Ne3 b4=+) 28.Qb5= Nc5 29.Ne5 Qd6 (better is 29...Rbc8!? 30.Rad1 Qc7=+) 30.Nc6+= Qd7 (30...Ne4 31.Nd8 Rd8 32.Rac1+/–) 31.a4 (31.Rab1 Ne4 32.Nb8 Qb5 33.Rb5 Rb8+-) 31...Rbc8 (better is 31...Ne4!? 32.Nb8 Qb5 33.ab5 Rb8+/–) 32.Nd8+- Rd8 33.Qb6 Nd3? (33...Ne4 34.a5 Nc3+-) 34.a5 (better is 34.Rfd1 f5 35.ef5+-) 34...h6 (34...Qe8+-) 35.a6 Ra8 36.Qb7 (better is 36.Rfd1 Kh7+-) 36...Qe8 37.a7 Nc5 38.Qb6 Ne4 (38...Nd7 39.Qc6+-) 39.Rfb1 Nf6 40.Qb8! Nd7 (40...Qb8 41.Rb8) 41.Qe8 Re8 42.a8Q (better is 42.Rb7+-) 42...Kf8 (42...Ra8 43.Ra8 Kh7+-) 43.Qa3 Kg8 44.Rb7 Ne5 45.f4 Nc6 46.Rc1 Nd4 47.Rcc7 Ne2 48.Kf2 Rf8 49.Qe7 Nf4 50.g3 Nd5 51.Qd7 Nc7+- 52.Rc7 (52.Qc7 h5+-) 52...g5 (52...Kh8 53.Qd6 Kg8 54.Qf4+-) 53.Rc8 (53.Qd4 e5 54.Qe5 Rd8+-) 53...g4 (53...Rc8 54.Qc8 Kg7 55.Qd8+-) 54.Rf8 Kf8 55.Ke3 Kg7 56.Kf4 h5 57.Qe7 e5 58.Ke5 h4 59.Qf6 Kf8 60.Qh4 Ke8 61.Qg4 Kd8 62.Kd6 f6 63.Qd7 1–0. Scirocco – NewMembership, Live Game Caissa's Web, 2004.

5.Nf3?? f6 6.Be2 (6.Nd4 Ne7=) 6...Ne7 (6...Nc6 7.a3 Be7 8.Nh4=+) 7.0-0 (7.Nd4 Nbc6=+) 7...0-0 8.d4 c5 (8...dc4 9.Bc4 Nbc6 10.a3=+) 9.cd5 (9.a3 Ba5 10.dc5 Nd7 11.cd5 ed5= (11...Nd5? 12.Nd4+-)) 9...Nd5 (9...Qd5!? 10.a3 Ba5=+) 10.a3= Ba5 11.dc5 b6 (better is 11...Nc6=) 12.Nd4+/– bc5 (12...Rf7 13.Bf3 Rd7+-) 13.Nf5+- ef5? (13...Nc6 14.Bc4 Rb8+-) 14.Bc4 Kh8 15.Bd5 (15...Qb6 16.Bc3 Bc3 17.Nc3+- (17.Ba8?! Ba1 18.Qc2 Na6=)) 1–0. gtate (1955) – ctessman (1885), net–chess.com, 2005.

5.Nf3?? Bf8 6.Nd4 Ne7 7.Qb3 =+.

5.Bg7+- d4 6.Bh8 d3 7.f3 (7.Qf3 Nc6 8.e4 Bg6+-) 7...Nh6 (7...Qh4 8.g3 Qc4+-) 8.e4 Bg6 9.Qb3 Nc6 10.Qd3 (10.Nh3 f5 11.Nf2 fe4 12.fe4 e5 13.Be5 Qe7+-) 10...Qh4 (10...Qd3 11.Bd3 0-0-0 12.Bg7 Rd3 13.Bh6+-) 11.g3 Qg5 12.Bc3 (12.Nh3 Qe7 13.Nf4 f6+-) 12...Rd8 13.Qe3 (13.Qc2 Bc5+-) 13...Qe3 14.de3 Bc5 (14...f5 15.a3 Bc5 16.Bf6+-) 15.Kf2 (15.Bf6 Rd7 16.Ke2 Nb4+-) 15...f5 16.Nd2 fe4 17.Ne4 (17.Nb3 Be7+-) 17...Be4 18.fe4 Ng4 19.Ke2 Ne3 20.Bh3 Nd4 (20...e5 21.Rb1 Nc4 22.Nf3+-) 21.Bd4 (21.Ke3 Nb5 22.Kf4 Nc3 23.Be6 Bg1 24.Rag1 Ne2 25.Ke3 Ng1 26.Rg1 Rd6+-) 21...Bd4 (21...Rd4 22.Nf3 (22.Ke3?! Rd1 23.Ke2 Ra1+/-; worse 22.Be6 Re4 23.Bg8 Re7+-) 22...Re4 23.Kd3 Rc4 24.Be6+-) 22.Be6 (better 22.Rb1 Nc4 23.Nf3 Nb6+-) 22...Ba1 23.Ke3 Rd1 24.Ke2 Rb1 25.e5! Bd4 (25...Be5 26.Bf5 Combination) 26.Bd5 (better 26.Bf5 Rg1 27.Rg1 Bg1 28.Bh7+-) 26...c6? (26...Bg1 27.Kf3 c6 28.Be4+-) 27.Be4 (better 27.Nh3!? Rh1 28.Bh1 Be5+-) 27...Rg1 28.Rg1 (28.Bh7?? Rh1 29.h4 Be5-+) 28...Bg1 29.h4 (better 29.Bh7!? Ke7 30.Bf5+-) 29...h6+/- 30.g4 (30.Kf3 Ke7+/-) 30...Bh2 31.e6 Ke7 32.Bf5 Kf6 (32...Bg3 33.g5 h5 34.Kf3 Bh4 35.Kf4+=) 33.Kf3 (33.g5 hg5 34.hg5 Ke7+-) 33...c5 (33...Bd6!?+/-) 34.a4 Bd6 35.Ke4 Bg3 (35...a5 36.Kd5 Be7 37.Bd3+-) 36.h5 (36.g5 Ke7 37.gh6 Bh4+-) 36...Ke7 (36...Bd6 37.Kd5 Be7 38.a5+-) 37.Kd5 (37.g5 hg5 38.h6 Bf2+-) 37...Bf2 38.g5! hg5 39.h6 Bd4 40.h7 b6? (better 40...Bh8+-) 41.Kc6 Bf6 (41...Bc3 42.Kb5 a5+-) 42.Kb7 Kd6 (42...a5 43.Kb6 Bc3 44.Kc5+-) 43.Ka7 Bg7 44.Kb6 Be5 45.a5 Ke7 46.a6 g4 47.a7 g3 48.a8Q g2 49.Qg2 (49.Qb7 Bc7 50.Qc7 Kf6 51.h8Q Kf5 52.Qce5 Kg6 53.Qhh5) 49...Bf6 (49...Ba1 50.Qb7 Kf6 51.h8Q Kg5 52.Qg2 Kf5 53.Qh4 Ke6 54.Qd5) 50.Qg6 (50.Qb7 Ke8 51.Qd7 Kf8 52.Qf7) 50...Be5 (50...Kd6 51.Qg3 Be5 52.h8Q Ke7 53.Qh7 Bg7 54.Qhg7 Ke8 55.Qb8) 51.Qf7 Kd6 52.Qd7 1-0. zembelek (2060) - avv (2075), Rated Blitz game, lichess.org, 2014.

5.Bg7+- f6 6.Bh8 Nc6 7.h4 Ne5 (7...dc4 8.Bc4 Nh6 9.Bb5+-) 8.Nf3 (better 8.Qa4 Nc6+-) 8...Nd3 (8...Nf3 9.Qf3 c6 10.Qg3+-) 9.Bd3 Bd3 10.cd5 (better 10.Qa4 Kf7 11.Qb4 dc4+-) 10...Qd5 11.Nc3 Bc3 12.dc3 0-0-0 13.Nd4 (13.Qa4 Qc5 14.Rc1 e5+-) 13...Qc4 (13...Qg2 14.Qf3 (14.Qd3?! Qh1 15.Qf1 Qd5+-) 14...Qf3 15.Nf3+-) 14.Qb3 Qb3 (14...e5 15.Qc4 Bc4 16.Ne2+-) 15.ab3 e5 16.Nf3 (better 16.Ne6 Rd6 17.Nc5 a6+-) 16...Ne7 (16...a6+-) 17.Bf6 Nd5 (17...e4 18.Ne5 Re8 19.Ra7+-) 18.Bd8 Kd8 (18...e4 19.Ra7 Kd8 20.Kd2+-) 19.0-0-0 (19.0-0-0 e4 20.Kb2+-) 1-0. BeepBeepImAJeep (2520) – ogromariatorres, lichess.org, 2019.

5.Bg7+- f6 6.Bh8 Kf7 7.cd5 Qd5 8.Nf3 (8.a3 Qe5 9.Ra2 Bd6+-) 8...Nd7 (8...Ne7 9.a3 Ba5 10.Nc3 Bc3 11.dc3+-) 9.Nh4 (9.Qa4 a5 10.a3 Nb6+-) 9...Bg6 (9...Ne7 10.Qa4 Nc6 11.a3+-) 10.Ng6 hg6 11.h4 (11.Qa4 Qe5 12.Qd7 (worse 12.Qb4 Qa1 13.Bb5 a5+-) 12...Ne7 13.Nc3 Bc3 14.Rb1+- (14.dc3?! Qc3 15.Ke2 Qa1+=)) 11...Ne7 12.h5 g5 (12...Rh8 13.Qa4 Ba5 14.hg6 Ng6 15.Rh8 Nh8 16.Nc3 Bc3 17.dc3+-) 13.Nc3 (better 13.a3!? Ba5 14.Bf6 Nf6+-) 13...Bc3 14.dc3 Qc6?! (14...Rh8 15.Qb3 Nc5+-) 15.Bf6! Nf6 (15...Nf6 16.Rc1 Combination; 15...Kf6 16.Rc1 Combination) 16.Qd4 (16.Rc1 Rh8+-) 16...Nf5 17.Qb4 (17.Qc4 Qc4 18.Bc4 Rh8+-) 17...Rd8 18.h6 (18.c4 Nh4 19.Qa5 Ng2 20.Bg2 Qg2+-) 18...Qd5 (18...Rh8+-) 19.c4?? (better 19.Qb2+-) 19...Qe5= 20.Rd1 Rd1 (20...Ne3 21.fe3 Qg3 22.Ke2 Qg4 23.Kf2 Rd1 24.Rh3 Ne4 25.Kg1-+) 21.Kd1=+ Ne4 22.Ke2?? (22.Qe1 Nf2 23.Qf2 Qa1 24.Ke2 Qb2 25.Ke1 Qc1 26.Ke2 Qb2 27.Ke1 Qc1 28.Ke2 Qc2 29.Ke1 Qc1=) 22...Qa1?? (better 22...Nf2 23.Rh3 Nh3 24.gh3 Qe3 25.Kd1 Qg1-+) 23.Qb3+= Qc1 24.Kf3?? (better 24.g4+=) 24...Qd2 (better 24...Nd2 25.Kg4 Nh6 (25...Nb3?! 26.h7 Qd1 27.Kg5 Qd8 28.Kg4-+) 26.Kg5 Nb3 27.ab3 Qc2 28.Rh6 Qf5 29.Kh4 Qf2 30.Kg4 Qf1-+) 25.Kg4 (better 25.Ke4 Qf2 26.h7 Ng3 27.Kd3 Qf5 28.Kd2 Qf2 29.Be2 Qe2 30.Kc1 Nh1 31.h8Q+-) 25...Nf2 (25...Qf2 26.Qc3 Ne3 27.Kh5 Ng3 28.Kg5 Qf5 29.Kh4 Qg4) 26.Kh5 Nh1 (26...Ng3 27.Kg5 Qd6 28.Qc2 Nge4 29.Qe4 Ne4 30.Kh5 Qg3 31.h7 Qg5) 27.h7 (27.h7 Qf2 28.h8N Kg7 29.Qc3 Kh7 30.Ng6 Nfg3 31.Kg5 Qf5 32.Kh4 Qh5). dale70 (2070) - Galuel (2110), Rated Blitz game, lichess.org, 2014.

5.Bg7+- Nf6 6.Bh8 Kf8 (6...Nc6 7.a3 Ba5 8.cd5 Nd5 9.Bb5+-) 7.Qb3 a5 8.a3 dc4 9.Bc4 Bd6 (9...Be7 10.f3+- (10.Qb7?! Be4 11.Qb5 Kg8+-)) 10.Nc3 (better is 10.Qb7 Be4 11.Qb2 Bg2 12.Bf6+- (12.Qf6?! Qf6 13.Bf6 Bh1+-)) 10...Kg8 (10...b6+-) 11.Bf6 Qf6 (11...Qc8 12.e4 Bg6 13.d4+-) 12.Qb7 Ra6 (12...Be4 13.Qe4 c6+-) 13.Qb8 Kg7 14.Ba6 Be5 15.Qb3 1–0. wlittle (2300) – debutler (2100), net–chess.com, 2004.

5.Bc4 Nc6 6.Bb5 =.

5.Bc4 Bd3 6.Qb3 Bc4 7.Qc4 c6 8.a3 (8.Nf3!?+/-) 8...Qd5= 9.Qd5 cd5 (9...ed5 10.Nf3=) 10.Ne2 (10.Nc3 a6=) 10...Nd7 11.d3 Nb6 (11...Ngf6 12.Nbc3=) 12.Nd2 Na4 13.Rb1 (13.Bd4 Ne7=) 13...Nb2 14.Rb2 Rc8 15.Kd1 Bd6 16.Nb3 Ne7 17.f4 Nf5 18.Kd2 Kd7 (18...Ke7 19.Rbb1=) 19.g4 (19.Nc5 Bc5 20.bc5 Rc5 21.Rb7 Rc7 22.Rc7 Kc7 23.Rc1 Kb7=) 19...Ne7 (19...Nh4 20.Rf1=) 20.h4 (20.Nc5 Bc5 21.bc5 Rc7=) 20...h5 21.g5 g6 (21...Nf5 22.Rbb1=) 22.e4 (22.Nc5 Bc5 23.bc5 Rc5 24.Rb7 Rc7 25.Rc7 Kc7 26.Rc1 Kd7=) 22...b6 23.Nbd4 Rhd8 (23...e5 24.fe5 Be5=) 24.Nb5 (24.e5 Bb8+=) 24...Bb8 (24...de4 25.Nd6 e3 26.Ke3 Kd6 27.Nd4=+) 25.Rc1 (25.e5 Rg8=) 25...Rc1 26.Kc1 de4 27.de4 Ke8 28.Rd2 Rc8 29.Rc2 Rc2 30.Kc2 a6 31.Nbd4 e5 32.fe5 Be5 33.Kd3 Kd7 34.Nf3 Bc7 (34...Nc6 35.Ned4 Bg3 36.Nc6 Kc6 37.Kd4=) 35.Kd4 Nc6 36.Kd5 Ne7 37.Kd4 Ke6 38.a4 (38.Ke3 Nc6=) 38...Nc6 39.Kc4? (better 39.Kc3=) 39...Ne5-+ 40.Ne5 Be5 (better 40...Ke5!? 41.Kd3 Bd6-+) 41.Kd3 b5 42.ab5 ab5 43.Nd4 Bd4?? (better 43...Kd7=) 44.Kd4+- Kd6 (44...f6 45.gf6 Kf6 46.e5 Ke6+-) 45.e5+= Kc6?? (better 45...Ke6+=) 46.Ke4+- Kc7 47.Kd5 Kd7 48.Kc5 Ke6 49.Kb5 Ke5 50.Kc6 f5 (50...Kf5 51.b5 Kg4 52.b6 Kh4 53.Kd5+-) 51.gf6! g5 (51...Kf6 52.b5 Passed pawn) 52.f7 gh4 53.f8Q h3 1-0. zembelek (2100) - kabalist (2370), Rated Blitz game, lichess.org, 2014.

5.Bc4 Bd3 6.Qb3 Bc4 7.Qc4 Qd5 8.Qd5 ed5 9.Nf3 Nd7 (9...Bb4?? 10.Bg7 Nf6 11.Bh8+- (worse 11.Bf6 Rg8+-)) 10.Nc3 c6 (10...Bb4? 11.Nd5 Ngf6 12.Nc7 Ke7 13.Na8 Ra8 14.Rb1+-) 11.b5 Ngf6 12.a4 c5 13.d3 Be7 14.Ke2 0-0 15.h3 Rac8 16.Rac1 (16.g4 h6=) 16...Rfe8 (16...Rfd8 17.g4 Nb8 18.g5=) 17.Rhd1 d4 (17...Bd6!?=) 18.ed4+= cd4 19.Ne4 Rc1 20.Rc1 Ne4 21.de4 Nc5 22.Bd4 Ne4 23.Kd3 b6 24.Rc7 Bc5 25.Ra7 Nf2 26.Bf2 (26.Kc4 Bd4 27.Nd4 Nd1+/-) 26...Bf2 27.Ne5 f6 28.Nc6 Re3 29.Kc4 Rg3 30.Kd5 (30.Ne7 Kf8 31.Nd5 Rg2+=) 30...Rg2 31.Ke6 h5 32.Ra8 (32.a5!? ba5 33.Ra5=) 32...Kh7=+ 33.Kf7 Bc5 (33...Rg5 34.Re8-/+) 34.a5 (34.Rd8 Bg1=) 34...ba5 35.Na5 f5 36.Nb3 (36.Rc8 Bd4 37.Nb3 Bf6=+) 36...Be3-/+ 37.Re8 (37.Na5 Rg3 38.h4 f4-/+) 37...f4 (37...Rg3 38.Re5-+) 38.Re4 (38.Re5!? g6 39.Kf6=+) 38...Rb2 39.Rb4?? (39.Nd4!? Bd4 40.Rd4 f3-+) 39...Bc5! 40.Nc5?? (better 40.Rf4 Rb3 41.Rf5-+) 40...Rb4 41.Ne6 (41.Ke6 f3 42.Nd3 Rb5-+) 41...f3 (41...Rb5 42.Nd4 f3 43.Nf3 Rf5 44.Ke6 Rf3 45.h4-+) 42.Ng5 Kh6 43.Nf3 Rf4 44.Ke6 Rf3 45.h4 Rb3 (45...Rb3 46.Kd6 Rb5-+) 0-1. zembelek (2040) - kabalist (2410), Rated Blitz game, lichess.org, 2014.

5.Bc4 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6).

5.Bc4 Nf6 6.b5 Bd6 7.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5 Bd6).

5.Bc4 Qh4 6.d3 (6.Bd4!?=) 6...Bb4=+ 7.Nd2 (7.Bc3 Qf6 8.Bb4 Qa1+-) 7...Nf6 (7...Qg5 8.Qf3 Nc6 9.Nh3 Bh3 10.Qh3-/+) 8.Ngf3 Qg4 9.h3 (9.Bf6!? gf6 10.Rg1=+) 9...Qg2-/+ 10.Qa4 (better is 10.Rh2!? Bd2 11.Kd2-/+) 10...Nc6-+ 11.Ke2 Qg6 (better is 11...Bd2 12.Nd2 Ng4-+) 12.Ne5 Qh5 13.Ndf3 0-0-0?? (better is 13...Bd6 14.Nc6 bc6=+) 14.Nc6+- Be4?? (14...bc6 15.Qb4 Kd7 16.Rag1+-) 15.Nce5 (15.Na7 Kb8 16.de4 Rd2 17.Kf1 Rb2 18.Nd4+/–) 15...a5 16.Rad1 Bf3 17.Nf3 c6 (17...Bd6 18.Rc1+-) 18.a3 Bd6 19.Qc2 Ne8 20.Rdg1 h6 21.Rg4 Rg8 22.Rh4 Qf5 23.e4 Qh7 24.Ba6 Rd7? 25.Qc6 Rc7 26.Bb7 Kb8 27.Qb6 Bc5 28.Qa6 Rb7 29.Be5 1–0. Pommerel,Wim – Gross,Wilhelm, corr sok, 1995.

5.b5 a6 6.a4 (6.Nf3 Nf6=) 6...ab5 (6...Nf6 7.Qb3=+) 7.ab5 (7.cd5 ed5 8.Bb5 Bd7=) 7...Ra1=+ 8.Ba1 b6 9.Nf3 Nd7 10.Be2 Bd6?? (10...dc4 11.Na3=) 11.0-0 (better 11.Bg7 Be5 12.Ne5 Ne5 13.Bh8 Nd3 14.Bd3 Bd3 15.cd5 Qd5 16.f3+-) 11...Ne7 (11...Ngf6!?=) 12.Bg7+= Rg8 13.Bh6 (13.Bc3 dc4 14.Bc4 Bh3+=) 13...Rg6 (13...Bh3 14.Bg5 Bg2 15.Kg2=+) 14.Bf4 Qc7 (14...Bf4!? 15.ef4 dc4=) 15.Bg3 Ne5 16.cd5 Nd5 17.d4 (17.Nh4 Bb1 18.Qb1 Rg7+/-) 17...Nf3 18.Bf3 Bg3 19.hg3 (19.fg3? Ne3 20.Qc1 Nf1 21.Qf1 Qd6 22.Bc6 Ke7-+) 19...Bb1 20.Qb1 Ke7 (20...cd4 21.Bd5 ed5 22.Rc1+/-) 21.dc5 (21.Rc1 Nf6+-) 21...bc5 22.Qd3 Nb4 (22...Nb6 23.Qe4+-) 23.Qc4 Qe5 24.Rc1 Rg5 25.b6 Kd6? (25...Qb2+-) 26.b7 Kc7 (26...Ke7 27.Qc5! Qc5 28.Rc5 Rc5+-) 27.Qb5 (better 27.Qb4 Kd7 28.b8Q Qb8 29.Qb8+-) 27...Kb8 28.Qe8 Ka7 29.Qa8 Kb6 30.b8Q Qb8 31.Qb8 Ka6 (31...Ka5 32.Ra1 Na2 33.Ra2) 32.Ra1 (32.Ra1 Na2 33.Ra2) 1-0. BeepBeepImAJeep (2620) – zeven, lichess.org, 2015.

5.bc5 Bc5?? 6.Bg7+- Ne7 (6...Nc6 7.Bh8 Nf6 8.cd5 Nd5 9.Nc3+-) 7.Bh8 Nbc6 8.Bf6 (8.Nf3 Nb4 9.Na3 Nec6+-) 8...Qa5 (8...Nb4 9.Na3+-) 9.Be7 (9.Nf3 dc4 10.Bc4 b5+-) 9...Ne7 (9...Ke7 10.g4 Bg6 11.cd5+-) 10.Nc3 d4 11.Qa4 Qa4 12.Na4 Bd6 (12...Ba3 13.c5 0-0-0 14.Bc4+-) 13.ed4 (13.c5 Bc7+-) 13...b6 (13...Ba3 14.Ne2+-) 14.Nf3 White intends c5 14...Bg4 (14...0-0-0 15.c5 Bc7 16.Rc1+-) 15.Be2 (15.c5 Bf3 16.cd6 Bc6+-) 15...Nf5 (15...Rc8 16.c5! Bf4 17.g3+-) 16.c5 bc5 (16...Be7 17.Rb1 Kf8 18.cb6 ab6 19.Nb6+-) 17.dc5 Bc7 (17...Bf4 18.g3 Bh6 19.Rb1+-) 18.h3 (better 18.Rb1 0-0-0+-) 18...Bh5 (18...Bf3 19.Bf3 0-0-0+-) 19.g4 Ne7 20.gh5 Nd5 21.d4 (21.Rb1 Ke7+-) 21...Nf4 22.Nd2 (better 22.Rb1 Rb8 23.Rb8 Bb8+-) 22...Ba5 23.Bf3 (better 23.Kd1!? Rd8 24.Nb3 Bc7+-) 23...Rd8 (23...0-0-0 24.d5! Nd3 25.Ke2 Nf4 26.Ke3 Nd5 27.Bd5 Bd2 28.Kd2 Rd5 29.Ke3 Re5 30.Kd4 Rh5 31.Ke4+-) 24.0-0-0 (better 24.d5 Nd3 25.Ke2 Nf4 26.Ke3 Nd5 27.Bd5 ed5+-) 24...Rd4 (24...Nd3 25.Kc2 Nf2 26.Nc4 Nh1 27.Rh1+-) 25.Nb3 Ra4 26.Bc6 Ke7 27.Ba4 Ne2 28.Kb2 Nc3 29.Bc6 (better 29.Rd7 Kf6 30.Bc6+-) 29...Kf6 30.Rd3 (better 30.Na5 Nd1 31.Rd1 Kf5+-) 30...Ne2 31.Rhd1 (better 31.Na5 Kg7+-) 31...Bc7 32.Re3 (better 32.Rf3!? Nf4+-) 32...Nf4 33.Rf3 e5 34.Rf4! ef4 35.Bf3 Be5 36.Kc2 Kg5 37.Rg1 (better 37.c6 Kf6 38.Rd7+-) 37...Kh4 38.Bg4 (38.c6 Bg7 39.c7 f5 40.c8Q Bf8 41.Qf5 Bc5 42.Qg4) 38...Kg5 39.f3 (better 39.c6 a5+-) 39...Kf6 40.Kd3 Ke7 41.Ke4 f6 42.Bf5 Kd8 (42...Kf7 43.Nd4 Bd4 44.Kd4 a6 45.c6 a5 46.c7 a4 47.c8Q a3 48.Qe6 Kf8 49.Rg8) 43.Rg7 a6 44.Ra7 (44.Rh7 a5 45.h6 Bb8 46.Rh8 Ke7 47.Rb8 Kf7 48.h7 Kg7 49.h8Q Kf7 50.Qf8) 44...a5 (44...Bc7 45.Nd4 a5 46.Ne6 Kc8 47.c6 Be5 48.Ra8 Bb8 49.c7 Kd7 50.cb8Q Kc6 51.Ra6 Kd7 52.Qd8) 45.c6 a4 (45...Bc7 46.Nc5 h6 47.Ne6 Kc8 48.Nc7 Kd8 49.Ne6 Ke8 50.Bg6) 46.Nc5 Ke8 (46...Bc7 47.Ne6 Kc8 48.Rc7 Kb8 49.Rb7 Kc8 50.Nf4 Kd8 51.c7 Ke7 52.c8Q Kd6 53.Qc7) 47.Ne6 h6 (47...Bc7 48.Rc7 a3 49.Kf4 h6 50.Bg6) 48.Bg6 1-0. dale70 (2000) - Vakamb (1965), Rated Blitz game, lichess.org, 2015.

5.bc5 Nc6+=.

(--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.c4 e6).

5.Nf3 Nd7 6.Be2 Ngf6 7.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Be2).

5.Nf3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

5.Nf3 Bb1 6.Rb1+= Nec6 7.cd5 Qd5 8.b5 Nb4 9.a3 Nd3 10.Bd3 Qd3 11.Bc3 (11.Ne5 Qf5=) 11...Ba3 (11...Nd7 12.a4=) 12.Ne5 (12.Rb3 Qd6 13.Ne5 a5+-) 12...Qd8 (12...Qf5!?=+) 13.Qa4 (13.Qf3!? 0-0 14.Qb7+-) 13...Bd6 14.b6 Kf8 15.ba7 Be5 16.Be5 Nc6 17.Bd4 Nd4 18.ed4 b6 19.0-0 g6 20.Ra1 Kg7 21.Rfc1 Qd6 22.Rc6?? (22.Qa3 Qd4 23.Rc7 Qd2 24.Rb1+=) 22...Qf4?? (better 22...Ra7! 23.Qd1 Qc6 24.Ra7 Rd8-+) 23.Qc4 Rhc8 24.Qc3 Kg8 25.g3 Qf5 26.Rc7 Qe4?? (better 26...Rf8+-) 27.Rc8+- Rc8 28.Qc8 Kg7 29.a8Q Qd4 30.Qh8 (30.Qh8 Kh6 31.Qd4 g5 32.Qf8 Kh5 33.Qf7 Kh6 34.Qdf6) 1–0. GuestKJQG – GuestKHPX, freechess.org, 2017.

5.Nf3 c6 6.h3 Nd7 7.g4 (7.Nc3 Nf6=) 7...Bg6=+ 8.d3 f6 9.h4 (9.a3 e5=) 9...h6 10.Nbd2 Qc7 (better is 10...h5=) 11.Bh3 (better is 11.h5!? Bh7 12.Rc1=) 11...Bd3-/+ 12.g5 (12.Rc1 0-0-0-/+) 12...hg5 13.Be6 Nb6 (13...dc4 14.Nc4 Bc4 15.Bc4-/+) 14.c5 g4?? (better is 14...Nc4!? 15.Nc4 dc4-/+) 15.Nd4 g3 16.f4 Nc4-/+ 17.Nc4 Bc4 18.h5 g6 19.Qg4 g5?? 20.h6 Bd3 21.f5?? Qe5?? 22.Qh5+- Kd8 23.Nc6! bc6 24.Be5 Rh6 25.Qh6 Bh6 26.Bg3 Bf8 27.Bd6 Ke8 28.Rh8 g4 29.Kf2 a5 30.ba5 Ra5 31.Kg3 Be2 32.Rb1 Bb5 33.Kg4 Ra2 34.Rb5! cb5 35.c6 Ra6 36.Be7 Ke7 37.c7 Ra4 38.Kf3 Rc4 39.Rh7 Kd6 40.c8Q Rc8 41.Bc8 Ke5 42.Be6 Bd6 43.Rh4 b4 44.Rd4 b3 45.Rd5 1–0. bentengutama (1955) – bienopia (2120), net–chess.com, 2003.

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6).

5.a3 c6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.a3 Be7 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3 Be7).

5.b5 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.b5 Be7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.c4).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4).

5.Nf3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

4.d4 Bb4!? 5.c3 Bd6 -/+.

4.d4 Bb4-/+ 5.Nd2 Nf6 6.Ngf3 Nbd7 7.g3 Ne4 8.Bg2 Ndf6 9.0-0 0-0 10.a3 Bc3 11.Bc3 Nc3 12.Qe1 Nb5 (12...Bc2?! 13.Rc1 Bd3 14.Rc3 Bf1 15.Bf1=) 13.Ra2 Qd6 14.a4 (14.Qa1!? Qe7 15.Ne5-/+) 14...Nc3-+ 15.Rb2 Na4 16.Rb7 Rfb8 (better is 16...Bc2!? 17.Qa1 Qc6-+) 17.Rb8-/+ Rb8 18.c4? (better is 18.Qa1 Qa6 19.Rc1-/+) 18...Bd3-+ 19.c5 Qe7 20.Qa1 Bf1 21.Kf1 (21.Qa4 Bg2 22.Qa7 Qd8 23.Kg2 Qc8-+) 21...Qe8 22.Ne5 Qb5 23.Ke1 a5 24.Bf1 Qe8 25.Bd3 Nb2 26.Qa5 Nd3 27.Nd3 c6 28.h3 Ne4 29.Nf3 Qc8 30.Nfe5 (30.Kf1 Ra8 31.Qb6 Ra6-+) 30...f6 31.Ng4 (31.Nf3 e5 32.g4 h5-+) 31...Qb7 32.Ke2 (32.Qa4-+) 32...Qb1 33.Qe1 (33.Qa3-+) 33...Qc2 34.Kf1 Rb1 35.Qb1 Qb1 36.Ne1 Nd2 (36...Qd1 37.f4 h5 38.Ne5 fe5 39.fe5 Qd2 40.Nd3 Qd3 41.Kg2 Qe2 42.Kh1 Qf2 43.g4 Ng3) 37.Ke2 Qb2 (37...Qa2 38.Kd1 h5 39.Nf6 gf6-+) 38.Nh2 (38.Nd3 Qc3 39.Nf4-+) 38...Ne4 39.Kf1 Qf2 0–1. Gorniak,Weronika – Pyzio,Amelia, DW Poland, 2012.

4.d4 Nf6 5.a3+= a6 6.Bd3 Bd3 7.Qd3 Ne4 8.Nd2 Nd2 9.Qd2 Be7 10.Nf3 0-0 11.0-0 b5 12.Rfe1 c6 13.Rac1 Nd7 14.c3 Nf6 15.Ne5 Ne4 (15...Qc7 16.Rf1-/+) 16.Qd1 Qd6 17.f3 Nf6 18.Ra1 Nd7 19.Nd7 Qd7 20.a4 Bh4 (20...a5 21.Ba3+=) 21.g3 Bf6 22.ab5 ab5 23.Qb3 Ra1 24.Ra1 g6 25.Qa3 Kg7 (25...e5!?+=) 26.Qa7= Qa7 27.Ra7 Rc8 28.Kf2 e5 29.h3 ed4 30.ed4 Kh6 31.Bc1 Bg5? 32.Bg5 Kg5 33.Rf7 h5 34.h4 Kh6 35.Rf6 c5?? 36.dc5 Rd8 37.Rb6 d4 38.cd4 Rd4 39.Rb5 Rd2 40.Ke3 Rc2 41.Rb6 Rc3 42.Ke4 Rc4 43.Kd5 Rc3 44.c6 Rf3 45.c7 Rf8 46.Rb8 Rf5 47.Ke4 Rb5 48.Rb5 (48.Rb5 Kg7 49.c8Q Kf6 50.Qd7 g5 51.Rb6) 1–0. Fournier,Frederic (1650) – damiski, Active, 2008.

4.d4 Nf6 5.a3=+ Nc6 6.b5 Nb8 7.c4 c6 (7...Be7 8.Nf3=+) 8.a4 (8.Nf3 Be7=) 8...dc4 (8...Ne4 9.Nc3=+) 9.Bc4 cb5 10.Bb5 Nbd7 11.Nf3 a6 (11...Bb4 12.Nbd2=) 12.Bd7 Qd7 13.Ne5 Qd5 (13...Qd8 14.a5=) 14.0-0 Bd6 (14...Rc8 15.Nc3 Qa5 16.Rc1=) 15.Nc3 Qa5 16.f3 (16.Nc4!? Qc7 17.Nd6 Qd6 18.f3+=) 16...Be5=+ 17.de5 Nd5 (better is 17...Qe5!? 18.e4 Qc5 19.Kh1 Bg6=) 18.Nd5+= Qd5 (18...ed5 19.Qb3+=) 19.Qd5 (19.e4!? Qd1 20.Rfd1+/–) 19...ed5+= 20.e6 (20.Rfd1 Rd8+=) 20...Be6 (20...f6 21.Rfc1 Be6 22.Rc7=) 21.Bg7+= Rg8 22.Bf6 (22.Bd4 Rc8+=) 22...Rg6 23.Be5 (23.Bd4 Bh3 24.Rf2 b6+=) 23...Bh3 (23...Rc8 24.Rab1=) 24.Ra2 Bg2?? (better is 24...b6+=) 25.Rg2+- Rg2 (25...Rc8 26.Rb1 Rc4 27.Kf1+- (27.Rb7? Rc1 28.Kf2 Rc2 29.Kf1 Rgg2-+)) 26.Kg2 Ke7 (26...Rc8 27.Rb1+-) 27.Rc1 (27.Rb1!? Ke6 28.Bd4 b5 29.ab5 ab5 30.Rb5 Ra6+-) 27...Rd8 28.Bd4 f6 (28...Kd7 29.Rb1 Kc8 30.Kg3+-) 29.Rc7 Rd7 30.Rd7 (30.Bf6!? Ke6 31.Rd7 Kd7+-) 30...Kd7 31.Kg3 (31.Bf6 b5+-) 31...Ke6 32.Kf4 h6 (32...b5 33.ab5 ab5 34.Kg4+-) 33.h3 (33.a5 f5 34.h4 Kd6+-) 33...h5 (33...b5 34.ab5 ab5 35.Kg4+-) 34.h4 (better is 34.a5 f5+-) 34...b6 (34...b5 35.ab5 ab5+-) 35.Bb6 Ke7 36.Bc5 Ke6 37.e4 (better is 37.Bd4 a5 38.Bb6 Kd7+-) 37...de4 38.fe4 Kf7 39.Kf5 Kg7 (39...Kg7 40.Ke6 f5 41.ef5 a5 42.f6 Kg8 43.f7 Kg7 44.f8Q Kh7 45.Qf7 Kh6 46.Be3) +-. kamera – gzzz (1670), GameColony.com, 2002.

4.d4 Nf6 5.a3=+ Bd6 6.Nf3 =+.

5.a3 c5 6.c3 c4 7.d3 cd3 8.Bd3 Bd3 9.Qd3 Nc6 (9...a5+=) 10.b5? (better is 10.c4!?=) 10...Ne5-/+ 11.Qd4 Nc4 12.Ra2 Qb6 (12...e5 13.Qd1-+) 13.Qb6-/+ ab6 14.Nf3 Bd6 (14...Ra5 15.Nfd2-/+) 15.0-0 (15.Nfd2 Nb2 16.Rb2 Ke7+= (16...Ba3? 17.Ra2+-)) 15...0-0 (15...Ra5 16.Nbd2 Rb5 17.Nc4 dc4 18.Nd2-/+) 16.Nbd2+= Nb2 17.Rb2 Ra3 18.Nb1 (18.c4!?+=) 18...Ra5-/+ 19.Nd4 Rfa8 20.Nd2 Ra2 (20...e5 21.Nf5 Ba3 22.Rb3-/+) 21.Ra2 Ra2 22.N2f3? (better is 22.Rd1-/+) 22...Ne4-+ 23.h3 (23.g4 g6-+) 23...g6 24.g3 Nc3 25.Ng5 (25.Rc1 Ra3-+) 25...h6 (25...e5 26.Nb3-+) 26.Ngf3 Kf8 27.g4 (27.Rc1 Ra3-+) 27...e5 28.Nb3 Rb2 29.Nc1 Rb5 (29...Nb5?! 30.Nd3 Ra2 31.Nfe5-+) 30.Nd3 (30.Kg2 Ra5-+) 30...e4 (better is 30...Ne2 31.Kg2 e4 32.Nfe5-+) 31.Nd4 Ra5 32.Nf4 Bf4 33.ef4 Ra4 34.Nc2 (34.Rc1 Rd4 35.Rc3 Rd3 36.Rc8 Kg7-+) 34...b5 (34...Ne2 35.Kh2-+) 35.f5 (35.f3 d4 36.fe4 d3-+ (worse is 36...Ne4 37.Rd1-+)) 35...b4 36.Nd4 gf5 37.gf5 Ra3 38.Nc2 Ra2 39.Nb4 time (39.Nb4 Rb2 40.Nd5 Nd5 41.Re1-+) 0–1. ronnieg – nicolana, fics, 2001.

5.a3 c5 6.c3 Nc6 7.b5 (7.Nf3 c4=+) 7...Na5 8.Nf3 c4 9.a4 Bd6 10.d4 0-0 (10...cd3 11.Bd3 Bd3 12.Qd3-/+) 11.0-0 (11.Nbd2 Qe7=+) 11...Bb1 (11...Nb3!? 12.Ra2 a6 13.ba6 Ra6-/+) 12.Rb1 a6 13.Bc1 ab5 14.Rb5 Ne4 15.Qc2 Ng5 (15...Qc7 16.Bb2-/+) 16.Ne5 (16.Ng5 Qg5 17.f4 Qg6 18.Qg6 hg6=) 16...Be5 17.de5 b6 (17...Qe7!?=) 18.Rd1 Nb3 19.Bc4 Nc1 20.Qc1 Ra4 (20...Nh3 21.gh3 Qg5 22.Kh1 dc4 23.Qc2=) 21.Bb3 Ra5 22.Ra5 ba5 23.Qa3 (23.c4 Qb6 24.Qa3 Rb8=) 23...Ne4 (23...Qc7 24.c4 dc4 25.Bc2=) 24.Bc2 (24.c4 Qg5 25.cd5 Qe5 26.de6 (26.Qa5?! Qb2 27.Qa2 Qa2 28.Ba2 Nc3=) 26...fe6 27.f4+/–) 24...Qa8?? (better is 24...Qc7!? 25.Be4 de4=+) 25.Be4 (better is 25.f3 Ng5 26.h4+-) 25...de4= 26.h3 f6 (26...Rc8 27.Rd4+=) 27.ef6+/– Rf6?? (27...gf6 28.Qd6 Qc8 29.Rd4+/–) 28.Ra1 (28.Qe7 Rf2 29.Kf2 Qf8 30.Qf8 Kf8 31.c4+-) 28...Rf5+= 29.c4 Qa6 (30.Qe7 Rf7 31.Qd8 Rf8+/–; 29...Qc8 30.Qc3+=) +/–. annmarie – oreoo, Live Game Caissa's Web, 2004.

5.a3 Bg6 6.d3 Be7 7.h4 h5 8.Nh3 Bf5 9.Nf4 Bg4 (9...a5 10.b5=) 10.Nd2 (10.f3!? Bf5 11.g4 hg4 12.fg4+-) 10...Be2 11.Qe2 Nbd7 12.Nf3 (12.e4 a5 13.b5 de4 14.de4 Rh7+=) 12...Bd6 13.Ng5 (13.c4 0-0=) 13...e5=+ 14.Nfh3 c6 15.c4 Qe7 16.0-0 a5 17.b5 cb5 18.cd5 a4 (18...Nd5!? 19.Rfc1 Rd8=+) 19.e4 Ng4 (19...0-0!?+=) 20.d4+- 0-0 21.Qb5 Rfc8 22.Rac1 Rab8 (better 22...Rc1!? 23.Rc1 Ba3 24.Qb7 Re8+-) 23.Qa4+- ed4 24.Bd4 (24.Qd4 Ndf6+-) 24...Ba3 25.Rc8 Rc8 26.Qb5 Bd6 (26...Ndf6!?+-) 27.Qb7+- Be5?? (better 27...Rb8 28.Qa7 Bh2 29.Kh1 Be5+-) 28.Be5 (28.Qc8 Nf8 29.Rd1 Bd4 30.Rd4 Qa3+-) 28...Qe5 (28...Rd8 29.Bc7 Re8+-) 29.g3 (better 29.Qc8 Nf8 30.f4 Qd4 31.Nf2 Nf2 32.Rf2+-) 29...Nc5?? (better 29...Qe8+-) 30.Qf7 (30.Qc8 Qe8 31.Qe8) 30...Kh8+- 31.Qh5 Nh6 32.Nf7 (32.Nf7 Kg8 33.Nh6 gh6 34.Qe5+-) 1–0. FeegLood (2685) – Burberry (2540), lichess.org, 2018.

5.b5 a6 6.Nc3 d4 7.ed4 ab5 8.Bb5 c6 9.Be2 Qd4 10.Nf3 Qb6 11.Rb1 Qc7 12.Nh4 Be7 (12...Be4 13.0-0=) 13.Nf5+= ef5 14.Bc4 Nbd7 15.Bb3 0-0 16.Qf3 g6 17.0-0 Bd6 18.h3 Rfe8 19.Rfe1 Bc5 20.Re8 Re8 21.d3 Ba7 22.a3 Ne5 23.Qf4 Nh5 24.Qh4 Bb8 25.f4 (better is 25.Kf1+=) 25...Nd3!-/+ 26.cd3 Qb6 27.Qf2 Qb3 28.g3 Rd8 0–1. nuclearowl (2060) – mind_butchery (2060), gameknot.com, 2013.

5.b5 Bd6 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6).

5.h4 h6 6.b5 Be7 7.Nf3 0-0 8.a4 c6 9.c4 dc4 10.Bc4 cb5 11.ab5 Nbd7 12.Nd4 Bh7 13.Be6 fe6 14.Ne6 Qb6 15.Nf8 Rf8 16.Qb3 Kh8 17.Bd4 Qc7 (17...Bc5 18.Bb2 Ng4 19.f4-/+) 18.Ra7= (worse is 18.Ba7 Ne4 19.0-0 Nf2-+) 18...Qc1 19.Qd1 Qb1 20.Rb7?? (better is 20.Qb1 Bb1 21.Rb7=) 20...Qe4 21.Qf3 Qf3?? (better is 21...Qe6 22.Bf6 Nf6-+ (22...gf6?! 23.Qc6 Bf5 24.Qe6 Be6 25.0-0=; 22...Bf6?! 23.Qc6 Qf5 24.0-0-+)) 22.gf3= Bd6 (22...Bd3 23.b6+=) 23.Rg1 Rc8 24.Rd7 Attacks the backward pawn on g7 24...Rc1?? (better is 24...Bd3 25.Kd1 Ba3+=) 25.Ke2+- Rg1 26.Rd6 Ne8 (26...Bc2 27.b6 Kh7 28.b7+-) 27.Rd7 (27.Rh6 Kg8 28.Rc6 Rb1+-) 27...Kg8 (27...Rb1 28.Re7 Nd6 29.Bg7 Kg8 30.Bh6+-) 28.b6 Rb1 29.b7 (better is 29.e4 Bg6 30.b7+-) 29...Kf8 (29...Bc2 30.Rd8 Bd1 31.Kd3 Rb7 32.Re8 Kf7 33.Re5+-) 30.Bg7! Ng7 31.Rd8 Ne8 32.b8Q Rb8 33.Rb8 Bf5 34.e4 Be6 35.d4 Bc4 36.Ke3 Ke7 37.d5 Nd6 38.Rh8 Nf7 39.Rc8 Bb5 40.f4 Kd6 (40...Bd7 41.Rg8+-) 41.Rg8 (41.Ra8 Kc5+-) 41...Ke7 42.Rg6 Bd7 43.e5 Bf5 44.Rb6 Bc8 (44...h5 45.Rb7 Ke8 46.Kd4+-) 45.Rc6 (45.Ke4 Bg4+-) 45...Bd7 (45...Bf5 46.Kd4 Bd7 47.Rc7+-) 46.Rc7 Kd8 (46...Ke8 47.e6 Be6 48.de6+-) 47.e6 1–0. mikebaldini (1670) – grisha, gameknot.com, 2014.

5.a3 b5 6.Be2 c5 (6...Nf6!?=) 7.bc5+/– Bc5?? (better is 7...Nf6 8.d4 Nc6+/–) 8.Bg7+- f6 (8...Nf6 9.Bh8 Kf8 10.d4+-) 9.Bh8 Nd7 (9...Kf7 10.d4 Bd6 11.g4 Bg4 12.Rg1+-) 10.Rg1 (10.Nh4 Bg6+-) 10...Qe7 11.g4 Bg6 12.a4 b4 13.c3 Nh6 14.g5 fg5 15.cb4 Bb4 16.Ng5 e5 17.Qb3 a5 18.Nc3 Bc3 19.dc3 Rb8 20.Qd5 Nf7 21.Nf7 Bf7 22.Bh5! Nf6 23.Qc6 Nd7 24.Rg8 Qf8 25.Bf6 Qg8 26.Qe6 (26.Qe6 Kf8 27.Qe7#) 1–0. Rosner,Dirk (2175) – Tortoza,Carlos, CiF, 2006.

5.a3= Nd7 6.Be2 Ngf6 7.0-0 h6 8.c4 (8.Nd4 Bg6=) 8...dc4 9.Bc4 Nb6 10.Be2 Be7 (10...Bd6 11.Nd4=) 11.d4 (11.d3 a5 12.b5 0-0=) 11...0-0 12.Nbd2 Ne4 13.Rc1 c6 (13...Bd6 14.Ne4 Be4 15.Bd3 Bd3 16.Qd3=) 14.Nb3 Na4 15.Ba1 Nb6 16.Ne5 (16.Bd3 Qd5=) 16...f6 17.Nc4 Nc4 18.Bc4 Nd6 19.Be2 (19.Bd3 Bd3 20.Qd3 Nb5+=) 19...Bg6 (19...Qe8 20.Nc5=) 20.Bh5 (20.Nc5 Bf7+=) 20...Bh5+= 21.Qh5 Nb5 22.Bb2 Qd5 23.Qd1 f5 24.a4 Nc7 25.Nc5 Rab8 26.Nd3 Rfd8 27.Bc3 Qd6 28.Qh5 Nd5 29.Bd2 Rf8 30.f4 Qd8 31.Rf3 Nf6 32.Qh3 Ne4 33.Be1 Qd5 34.Ne5 Rbd8 35.Ng6+= Rfe8 36.g4 Kh7 37.Ne7= Re7 38.Bh4 g5? 39.Bg5+- Ng5 40.fg5 fg4 41.Qh6 Kg8 42.Rf4 g3 43.Rcf1 gh2 44.Kh2 Rg7?? 45.Rh4 (45...Qd6 46.Kh3 Qg3 47.Kg3 Rd4 48.Qh8#) 1–0. Margraf,A – Hiller,B, Schwaben, 1991.

5.a3 Nf6 6.c4 dc4 7.Bc4 Nbd7 8.d4 Be7 9.Nc3 0-0 10.Rc1 c6 11.0-0 Qc7 12.Re1 Nb6 13.Bf1 (13.Bb3 Nbd5=) 13...Rfd8 14.Ne2 (14.e4 Bg6=) 14...h6 (14...Bd6 15.Ng3=) 15.Ng3= Bg6 (15...Ne4 16.Nf5 ef5 17.Bd3+=) 16.Ne5 Bh7 17.Qb3 (17.e4 Nbd7 18.Nd3 a5+=) 17...Nfd5 (17...Nbd7 18.Nc4=) 18.Bd3 (18.e4 Nf6+=) 18...Bd3= 19.Nd3 Rac8 20.Nc5 Nd7 21.Nge4 Nc5 22.dc5 (22.Nc5 Ra8=) 22...Rb8 23.Qc4 (23.f4 Ra8=) 23...Bh4 (23...a5!?=) 24.Nd6+= Bf6 25.Bf6 Nf6 26.e4 Qe7 (26...a5 27.Rc3+=) 27.g3 e5 28.Qe2 Ne8 29.Nf5 Qg5 30.h4 (30.Rcd1 Kh7+-) 30...Qd2+= 31.Qg4 Kf8 32.Rcd1 Qa2 33.Qf3 Qe6 34.Re3 Qf6 (34...Rd1 35.Qd1 Qc4 36.Qd7+-) 35.Red3 Ra8 36.R1d2 Rd3 37.Qd3 h5 38.Qd7 Rb8 39.Kg2 g6 40.Ne3 Qe7 41.Nc4 Nf6 42.Qe7 Ke7 43.Ne5 Ke6 44.Nc4 Ne4 45.Re2 Kd5 46.Nb6 Kd4 47.f3 Nc3?? (better 47...Nf6+-) 48.Rd2+- Ke3 (48...Ke5 49.Nd7 Kf5+-) 49.Nc4 1–0. Polischuk,Vyacheslav – Kostenko,Anastasiya, Stavropol Region Championship, 2010.

5.a3 Nf6 6.Be2 h6 7.0-0 Bd6 8.d4 (8.Nd4 Bg6=) 8...b5 (8...a5 9.b5=) 9.a4 ba4 (9...Nbd7 10.Ne5 ba4 11.Nd2=) 10.Ra4 a5 (10...Nbd7!?=) 11.ba5+/– 0-0 12.a6 Qc8 13.a7 Nc6 (13...Nbd7 14.Nc3 Qb7 15.Qa1+/–) 14.Ba6+- Qd7? (better is 14...Qd8 15.Bb7 Na7+-) 15.Bb5 (15.Bb5 Ne4 16.Nc3+-) 1–0. Machete99 – Baraka, ICC, 2002.

5.b5 ab5 6.Bb5 c6 7.Be2 h6 8.0-0 Nf6 9.d3 Be7 10.Nbd2 0-0 11.Ne5 Nbd7 12.Ndf3 Ne5 13.Ne5 Nd7 14.Qb1 Ne5 15.Be5 b5 16.Rd1 Bf6 17.Bb2 Bb2 18.Qb2 Qg5 19.f4 Qe7 20.g3 (20.c4 b4+=) 20...Rfc8 21.Rdb1 Qc5 22.Kf2 Bg6 23.g4 Qd6 (23...Ra4 24.Bf3-/+) 24.Qd4 Re8 25.Qe5 Qe5 26.fe5 Ra4 27.h3 Rc8 28.Bd1 Ra7 29.d4 Ra3 30.Rb3 Raa8 (30...Rca8 31.Ra3 Ra3 32.Ke2+=) 31.c3 Ra7 (31...Ra4 32.Rb4 Ra3 33.Rb3+=) 32.Rb4 (32.a4 ba4 33.Rba3 c5=) 32...Rca8 33.a4= ba4 34.Rba4+= Ra4 35.Ra4 Rc8 36.Ra5 Bd3 37.Be2 Be2 38.Ke2 g6 39.Kf3 Kg7 40.h4 Rc7 41.Kf4 f6 42.Ra6 Kf7 43.g5 fg5+= 44.hg5 h5 45.e4 de4 46.Ke4 Ke7 47.c4 Kf7 48.c5 Ke7 49.Ra8 Kf7 50.Ra1 Rb7 51.Rf1 Kg7 52.Rf6 Re7 53.d5 cd5= 54.Kd4 h4 55.Rf4 h3?? 56.Rh4?? Rf7?? 57.Rh3?? Rf4+= 58.Kd3 Rc4 59.Rf3 Rc5 60.Rf6 Rc6 61.Kd4 Rc4 62.Kd3 Rg4 63.Re6 Rg5 64.Kd4 Rf5 65.Kd5 Kf7 66.Rb6 Rf1 67.Rb7 ½–½. madik – grisha, gameknot.com, 2009.

5.c4 Bb4?? 6.Bg7 dc4 7.Bc4 b5 8.Be2 (worse 8.Bh8 bc4 9.Qa4 Nd7 10.Qb4 Rb8 11.Qc4 Rb1 12.Rb1 Bb1+-) 8...f6 (8...c5 9.Bh8 Nc6 10.a3+-) 9.Bh8 Kf7 (9...c5 10.0-0+-) 10.0-0 (better 10.Nd4 Ne7 11.Bh5 Ng6+-) 10...Nh6 (10...Ne7 11.Nd4 Qh8 12.Qb3+-) 11.a3 (better 11.Qb3!? c5 12.e4 Be4+-) 11...Bd6 12.Bf6! Qf6 (12...Qf6 13.Nd4 Combination; 12...Kf6 13.Nd4 Combination) 13.Nc3 e5 (13...Nc6 14.d4 Rg8 15.g3+-) 14.e4 Bg4 (14...Be6 15.d4 ed4 16.Nd4+-) 15.d4 (better 15.a4!? ba4 16.Qa4 Kg7+-) 15...Bf3 16.Bf3 (16.gf3?! ed4 17.Nd5 Bh2 18.Kh2 Qh4 19.Kg1 Qg5 20.Kh2 Qh5 21.Kg3 Nc6+=) 16...ed4 17.Nd5 Qe5 18.g3 (18.Bh5 Kf8 19.f4 Qe4+-) 18...c6 19.Nf4 (19.Bh5!? Kf8 20.f4 Qg7+-) 19...Nd7 20.Qb3 (20.Nd3 Qe6+-) 20...Ke7 21.Nd3 Qf6 (better 21...Qe6 22.Qe6 Ke6+-) 22.Rac1?? (better 22.Bg2 Ng4 23.Rae1+-) 22...Qf3-/+ 23.Rc6 Ne5?? (23...Nf7 24.Qd5 Qd3 25.Rd6 Nd6 26.Qa8 Qa3-/+ (26...Qe4?! 27.Qe4 Ne4 28.Re1=)) 24.Qd5 (24.Rd6 Qf7 25.Qb4 Nd3 26.Qd4 Nf4+-) 24...Qf6?? (better 24...Nc6 25.Qc6 Rd8-+ (25...Qd3?! 26.Qa8 Nf7 27.Qb7 Kf8 28.Qc8 Kg7 29.Qg4 Kf6 30.Qh4 Ke6 31.a4=+)) 25.Ne5+- Qe5 26.Rd6 (26.Qe5 Be5 27.Rh6 Kf8+-) 26...Qd6 27.Qa8 d3 28.Qd5 (28.Qb7 Kf6+-) 28...Qd5 29.ed5 Kd6 30.Rd1 Kd5 (30...Ng4 31.f4+-) 31.Rd3 Kc4 (31...Kc6 32.Rf3 Ng4 33.Rf5+-) 32.Re3 (better 32.Rd7!? Nf5 33.Rh7 Nd4+-) 32...Nf5 33.Re6 a5 34.Ra6 a4 35.Rb6 Nd4 36.f4 Kb3 (36...Kc5 37.Rb8+-) 37.Rd6 (37.f5 Ka3 38.f6 Nf3 39.Kg2 Ne5 40.Rb5 Ng6+-) 37...Nc2? (37...Ne2 38.Kf2 Nc3 39.Rd4 Ka3 40.f5+-) 38.Rd3 (better 38.f5 b4 39.f6 ba3 40.Rd3 Kb2 41.Ra3 Na3 42.f7+-) 38...Kc4 39.Rf3 Nd4 40.Re3 Nf5 (40...b4 41.ab4 Kb4 42.Re4+-) 41.Re5 Nd4 42.Re4 (42.Kf2 b4 43.ab4 a3+-) 42...Kd3? (better 42...b4 43.Kf2 Kc3+-) 43.Re5 (43.Re7 Kc3+-) 43...Kc4 44.f5?? (better 44.Kf2 b4 45.ab4+-) 44...Nf3-+ 45.Kf2 Ne5 46.Ke3 Kb3 (better 46...b4 47.ab4 a3 48.Kf4 Nd3 49.Kg5-+) 47.Ke4 Nf7 48.h4 Ka3 49.g4 b4 50.g5 (50.Kd5 b3 51.Ke6 Nh6-+) 50...b3 51.g6 hg6 52.fg6 Nh6 53.Kf4 b2 54.Kg5 Ng8 (54...Ng8 55.h5 b1Q-+) 0-1. Nf3 (1935) - Tiko1986 (1935), Rated Classical game, lichess.org, 2013.

5.c4 dc4 6.Bc4 Nf6 7.a3 =.

5.c4 f6 6.a3 (6.Nd4 Nh6+=) 6...dc4 (6...Nh6 7.Nd4+=) 7.Bc4+= c5 (7...b5 8.Bb3 a5 9.Nd4+/–) 8.bc5+/– Bc5 9.Qb3 (9.Nh4 Qb6 10.Nf5 ef5+/–) 9...Qb6 (9...Qd7 10.d4 Bd6 11.e4 Be4 12.Be6+=) 10.Qb6+/– Bb6 11.Nc3 (11.Nh4 Nc6+/–) 11...Ne7 (11...Nc6 12.Bb3+=) 12.0-0 (12.Nh4 Kf7+=) 12...Nd7 13.Nh4 (13.d3 Rc8=) 13...e5 (13...Ne5!? 14.Bb3 Bd3=) 14.Nf5+= Nf5 15.Nd5 (15.Rfd1 Nd6 16.Bd5 Ba5+=) 15...Nd6 (15...Ba5+=) 16.Nb6 (16.Be2!?+=) 16...Nb6= 17.Ba2 (17.Be2=) 17...Nf7 (better is 17...Ndc4!? 18.Bc1 0-0-0=) 18.Rac1 (18.Rab1 Na4 19.Bd5+=) 18...0-0 (better is 18...Rd8!? 19.d4 Rf8+/–) 19.d4 Kh8 (19...Na4 20.Ba1+-) 20.Bf7 (20.Rc7 Na4 21.Ba1 Ng5 22.de5 Rad8+-) 20...Na4 (20...Rf7 21.de5 fe5 22.Be5+-) 21.Ba1 (21.Bd5 Nb2 22.Rc2 Na4 23.Bb7 Rad8 24.de5 fe5 25.Ba6 Nb6+-) 21...Rf7 22.de5 fe5 23.Be5 Nb6 24.Bd4 Nd5 25.Rfd1 Rd7 26.h3 Rad8+/– 27.Re1 Kg8 28.Re2 Ne7 29.Rec2 Nc6 30.Bb2 Rd2 31.f3 h6 32.e4 Rc2 33.Rc2+- Nd4 34.Bd4 Rd4 35.Rb2 b5 36.Rb4 Rd1 37.Kf2 Rd2 38.Kg3 Ra2 39.Rb3 Kf7 40.Rc3 a5 41.f4 b4 42.ab4+- ab4 43.Rc1 Rb2 44.Kf3 b3 45.g4 Rc2= 46.Rb1 Rc3 47.Ke2 Rh3+= 48.Kd2 Rg3-/+ 49.Ke2 Rg4 50.Kf3 Rh4 51.Kg3 g5 52.Rb3 Rf4-+ 53.Rf3?? Rf3 54.Kf3 Ke6 55.Kg4 Ke5 56.Kf3 h5 57.Kg3 Ke4 58.Kh3 Kf3 59.Kh2 g4 60.Kg1 h4 61.Kf1 h3 62.Kg1 g3 63.Kh1 g2 64.Kg1 h2! 65.Kh2 Kf2 66.Kh3 g1Q (66...g1Q 67.Kh4 Qg6 68.Kh3 Qg3#) 0–1. Berner,Stephan – Colloseus,Christian, GER–ch U12 Ueberlingen, 2000.

5.c4 Nf6 6.Qa4 Nbd7 7.c5 a5 8.Bf6 gf6 =.

5.c4 Nf6 6.c5 Be7 7.Be2 0-0 8.d4 b6 9.0-0 bc5 (9...a5 10.a3=) 10.bc5 (10.dc5 a5 11.a3 ab4 12.ab4 Ra1 13.Ba1 Nc6=) 10...Nc6 (10...Ra7 11.Nc3=) 11.Bd3 (11.Nh4 Be4=) 11...Bd3 (11...Qb8 12.Bc3=) 12.Qd3 Ne4 (12...Qb8 13.Qc2=) 13.Bc3 (13.Nc3 f5=) 13...a5 14.a3 Rb8 15.Nbd2 Nc3 16.Qc3 Bf6 17.Rab1 Qe7 18.Ne5 Be5 19.de5 Qg5 20.f4 Qh5 21.Qd3 f6 22.Qa6 Qe8 23.ef6 gf6 24.Rb8+/– Nb8 25.Qa5 Qe7 26.Qc3 Nc6 27.Nf3 Re8 28.Nd4 Nd4 29.ed4+- c6 30.Re1 Kh8 31.Qb4 Qc7 32.g3 Rb8 33.Qc3 Re8 34.a4 Qd7 35.Qb4 Kg7 36.Rb1 Re7 37.a5 e5 38.fe5 fe5 39.de5 Re5?? 40.a6 Kg6 41.Qb7 Qf5?? 42.Qc6 Kg5 1–0. Heidebreck,Sven – Barte,A, Balatonalmadi op–B, 1996.

5.Nd4 Nc6 6.Nf5 ef5 7.a3 (7.c4 dc4 8.Bc4 Qh4 9.Qb3 0-0-0 10.0-0 Nf6 11.a3 Kb8 12.Bf7; 7.Bd3 Nb4 8.Bf5 Qg5 9.Bh3 Nf6 10.a3 Nc6 11.Bf6 Qf6 12.Nc3; 7.b5 ab5 8.Bb5 Nf6 9.Qf3 Be7 10.Qf5 0-0 11.Nc3 g6 12.Qf3) 7...Nf6 8.Bd3 Bd6 9.Nc3 0-0 10.Bf5 Qe7 11.Bd3 a5 12.b5.

5.Nd4 Be4 =.

5.Nd4 Ne7 A) 6.g4 A1) 6...Bg6 7.h4 (7.Nc3 Nec6 8.b5 Nd4 9.ed4 ab5 10.Bb5 Nc6 11.a4 Bd6 12.Bc6) 7...h5 8.b5 hg4 9.Qg4 ab5 10.h5 Be4 11.f3 Bf5 12.Nf5; A2) 6...Be4 7.f3 (7.Rg1 Nec6 8.Nc3 Bg6 9.Nce2 Nb4 10.Nf4 N8c6 11.Nc6 Nc6 12.Bg2) 7...Bg6 8.h4 h5 9.gh5 Bh5 10.b5 e5 11.Nb3 Ng6 12.d4; B) 6.b5 B1) 6...c6 7.a4 (7.ba6 Na6 8.Nc3 Nc5 9.Be2 e5 10.Nf5 Nf5 11.Bg4 Qg5 12.Qf3; 7.Nf5 Nf5 8.g4 Nd6 9.bc6 Nc6 10.Nc3 Be7 11.Bd3 Ne5 12.Na4; 7.c4 dc4 8.ba6 Na6 9.Bc4 b5 10.Be2 Nc5 11.0-0 Qd7 12.Bc3) 7...ab5 8.ab5 Ra1 9.Ba1 Bg6 10.Nc3 c5 11.Nf3 Nd7 12.Bb2; B2) 6...ab5 7.Bb5 c6 8.Be2 Qb6 9.Qc1 c5 10.Nf5 Nf5 11.Nc3 Be7 12.Bd3; C) 6.Nc3 Nbc6 7.Nf5 (7.Nce2 e5 8.Nf5 Nf5 9.a3 Qg5 10.Ng3 Nh4 11.Qh5 Be7 12.Qg5) 7...Nf5 8.a3 Be7 9.Bd3 0-0 10.Bf5 ef5 11.Qf3 Bf6 12.Qf5; D) 6.Nf5 Nf5 7.a3 (7.Be2 Nc6 8.a3 Bd6 9.g4 Nh4 10.Bg7 Rg8 11.Bb2 h5 12.h3; 7.Nc3 Nc6 8.b5 ab5 9.Nb5 Qd7 10.a4 h5 11.Bd3 f6 12.Be2; 7.c4 dc4 8.Bc4 Nc6 9.g4 Nd6 10.Be2 h5 11.gh5 Qh4 12.Nc3; 7.g4 Nh4 8.Bd3 Nc6 9.a3 h5 10.Rg1 Qd6 11.Rg3 hg4 12.Qg4; 7.Bd3 Nc6 8.a3 Be7 9.g4 Bf6 10.Nc3 Nd6 11.0-0 Ne5 12.f4) 7...Nc6 8.Bd3 Bd6 9.Nc3 Qf6 10.0-0 a5 11.f4 ab4 12.ab4; E) 6.c4 E1) 6...dc4 7.Bc4 Nbc6 8.g4 Bg6 9.a3 Nd4 10.Bd4 Nc6 11.Bb2 Qh4 12.Qf3; E2) 6...Bg6 7.Nc3 (7.Qa4 Nd7 8.c5 a5 9.ba5 c6 10.Nb3 Nf5 11.Qb4 Rb8 12.Nc3) 7...Nbc6 8.Qa4 Qd7 9.Nf3 Ra7 10.d3 Nf5 11.cd5 Nb4 12.Qd7; E3) 6...Nbc6 7.Nf5 Nf5 8.cd5 ed5 9.a3 Qg5 10.Nc3 0-0-0 11.d4 Bd6 12.g3; F) 6.a3 F1) 6...Bg6 7.Bd3 (7.h4 Nbc6 8.h5 Bf5 9.Nc6 Nc6 10.g4 Be4 11.f3 Be7 12.fe4; 7.Nf3 Nbc6 8.c4 dc4 9.Bc4 Bd3 10.Qb3 Bc4 11.Qc4 Qd5 12.Qd5; 7.Nc3 Nbc6 8.Nb3 Nf5 9.Bd3 a5 10.ba5 Ne5 11.0-0 Bd6 12.e4) 7...e5 8.Nb3 Nbc6 9.Nc3 Nf5 10.0-0 Be7 11.f4 e4 12.Be2; F2) 6...Nbc6 7.Nf5 (7.Bd3 Bd3 8.cd3 Nd4 9.Bd4 Nc6 10.Bb2 Bd6 11.Qg4 Qd7 12.Qg7) 7...Nf5 8.Bd3 Be7 9.Nc3 Ne5 10.Bf5 ef5 11.Ne2 Bf6 12.Be5; G) 6.Be2 Nbc6 7.Nf5 (7.c3 Nd4 8.cd4 Nc6 9.a3 Bd6 10.Nc3 0-0 11.0-0 Qg5 12.f4; 7.0-0 Nd4 8.ed4 Nc6 9.c3 Bd6 10.Na3 0-0 11.Nc2 Qh4 12.g3; 7.Na3 Nd4 8.ed4 Nc6 9.c3 Bd6 10.0-0 Qg5 11.Nc2 a5 12.b5 ; 7.a3 Nd4 8.Bd4 Nc6 9.Bb2 Qg5 10.Bf3 0-0-0 11.h4 Qg6 12.d3) 7...Nf5 8.a3 Be7 9.g4 Bf6 10.Nc3 Nd6 11.0-0 0-0 12.d4.

5.Nd4 Nh6 A) 6.Be2 A1) 6...Nc6 7.Nc6 (7.0-0 Nb4 8.Na3 Qd6 9.c3 Nc6 10.Qa4 0-0-0 11.Nac2 e5 12.Nc6; 7.g4 Be4 8.Nc6 bc6 9.0-0 Bd6 10.f4 0-0 11.a3 a5 12.Nc3) 7...bc6 8.0-0 Qg5 9.f4 Qg6 10.Na3 Be4 11.Rf2 Bf5 12.e4; A2) 6...Nd7 7.a3 (7.Ba3 a5 8.ba5 Ba3 9.Na3 Ra5 10.Nab5 0-0 11.0-0 c6 12.Nc3) 7...Bd6 8.Nf5 Nf5 9.g4 Nh4 10.Bg7 Rg8 11.Bd4 Ng2 12.Kf1 Nh4; A3) 6...Bb4 7.a3 (7.Nf5 Nf5 8.g4 Nh4 9.Bg7 Rg8 10.Bb2 Nc6 11.Nc3 h5 12.h3; 7.Bc3 Bc3 8.Nc3 Nc6 9.Nc6 bc6 10.g4 Bg6 11.h4 f6 12.h5; 7.0-0 0-0 8.Nc3 Nc6 9.Nc6 bc6 10.f4 Rb8 11.a3 Bd6 12.Rb1) 7...Bf8 8.Nc3 Nc6 9.Nc6 bc6 10.Rb1 Qg5 11.Bf3 Rb8 12.h3; B) 6.c4 B1) 6...dc4 7.Bc4 (7.Nc3 Nd7 8.Bc4 Bb4 9.0-0 0-0 10.Be2 Nc5 11.a3 Ba5 12.a4) 7...Nd7 8.Qb3 Qg5 9.Be2 0-0-0 10.Nc3 Ne5 11.0-0 Bh3 12.g3; B2) 6...Nc6 7.Nc6 (7.Qa4 Qd6 8.c5 Qd7 9.Bb5 Rb8 10.Nc6 Rc8 11.Ba6 Ra8 12.b5) 7...bc6 8.Qa4 Qd7 9.Nc3 Bd6 10.Ne2 0-0 11.c5 Be7 12.Nd4; C) 6.Nc3 C1) 6...Bb4 7.a3 (7.Nf5 Nf5 8.a3 Bc3 9.Bc3 d4 10.ed4 Nc6 11.Bd3 Qg5 12.0-0) 7...Bd6 8.Nf5 Nf5 9.Bd3 Qg5 10.g4 Nh6 11.h4 Qg4 12.Be2; C2) 6...Nc6 7.Nc6 (7.Nf5 Nf5 8.b5 ab5 9.Nb5 Nd6 10.Qg4 f5 11.Qg3 Nb4 12.Nd4) 7...bc6 8.Ne2 Qh4 9.Nf4 Bb4 10.g3 Qg4 11.Be2 Qg5 12.h4; D) 6.Nf5 Nf5 7.a3 (7.Bd3 Nc6 8.a3 Be7 9.Nc3 Ne5 10.Bf5 ef5 11.Ne2 Bf6 12.Be5) 7...Nc6 8.Nc3 Be7 9.Bd3 Ne5 10.Bf5 ef5 11.Ne2 Bf6 12.Be5; E) 6.a3 E1) 6...Qd7 7.Bd3 (7.Nf5 Nf5 8.c4 dc4 9.Bc4 Qc6 10.Bf1 Nd7 11.Nc3 Ne5 12.b5; 7.c4 Nc6 8.cd5 ed5 9.Nf5 Qf5 10.Be2 0-0-0 11.0-0 Kb8 12.d4; 7.Nc3 Nc6 8.Nce2 0-0-0 9.Nc6 Qc6 10.Nd4 Qd7 11.Nf5 Nf5 12.Bd3; 7.Be2 Nc6 8.0-0 0-0-0 9.Nb3 Kb8 10.Nc3 e5 11.f3 Be6 12.f4; 7.Qf3 Be4 8.Qd1 Nc6 9.Nc6 Qc6 10.Nc3 Bf5 11.Be2 Bd6 12.b5; 7.b5 ab5 8.Bb5 Nc6 9.h3 Be7 10.Nc3 0-0 11.0-0 Qd6 12.Bc6; 7.d3 Nc6 8.Nd2 Nd4 9.Bd4 f6 10.Be2 e5 11.Bb2 a5 12.e4; 7.Rg1 Nc6 8.Nf5 Nf5 9.g4 Nh4 10.Nc3 Bd6 11.f4 0-0-0 12.Bd3; 7.g3 Nc6 8.Nf5 Nf5 9.Bd3 0-0-0 10.0-0 Kb8 11.b5 ab5 12.Nc3; 7.h4 Nc6 8.Nf5 Nf5 9.g4 Nd6 10.Nc3 0-0-0 11.b5 ab5 12.Nb5) 7...Nc6 8.0-0 Bd3 9.cd3 a5 10.ba5 Ra5 11.Bc3 Ra6 12.f4; E2) 6...Qd6 7.c4 (7.h4 Nc6 8.Nf5 Nf5 9.g4 Ng3 10.fg3 Qg3 11.Ke2 Qg4 12.Ke1) 7...Nc6 8.Nf5 Nf5 9.cd5 Qd5 10.Nc3 Qd7 11.Ne4 0-0-0 12.Rc1; E3) 6...Nd7 7.Nc3 (7.Be2 Qg5 8.Nf5 Nf5 9.g4 Nh4 10.f4 Qg6 11.Nc3 h5 12.g5; 7.c4 dc4 8.Bc4 c5 9.Nf5 Nf5 10.Qf3 cb4 11.ab4 Rc8 12.Be2; 7.h3 c5 8.Nf5 Nf5 9.Bd3 Qg5 10.Qg4 Qg6 11.0-0 c4 12.Bf5; 7.Nf5 Nf5 8.Bd3 a5 9.Bf5 ef5 10.Qf3 Nb6 11.Qf5 Nc4 12.Bc3) 7...Bd6 8.Be2 0-0 9.0-0 Bg6 10.f4 Nf5 11.Nf5 Bf5 12.Bf3; E4) 6...a5 7.Nc3 (7.ba5 Ra5 8.Nc3 Nd7 9.h3 Be7 10.Be2 0-0 11.0-0 c6 12.a4; 7.Nf5 Nf5 8.Bd3 ab4 9.g4 Nd6 10.ab4 Ra1 11.Ba1 Nc6 12.b5; 7.Bb5 c6 8.Nf5 Nf5 9.Bd3 Nd7 10.0-0 Bd6 11.Bf5 ef5 12.Qh5; 7.b5 Nd7 8.Be2 Qg5 9.g3 Bc5 10.Nf3 Qg4 11.h4 Be4 12.d3 ; 7.Qe2 Nd7 8.b5 Nc5 9.Nc3 Bd6 10.g3 0-0 11.Bg2 Qf6 12.0-0; 7.c4 dc4 8.Nc3 ab4 9.ab4 Bg4 10.Qb1 Ra1 11.Ba1 e5 12.Qe4; 7.Be2 ab4 8.ab4 Ra1 9.Ba1 Bb4 10.Nf5 Nf5 11.g4 Nh4 12.Bg7) 7...Nd7 8.ba5 Ra5 9.Be2 Be7 10.0-0 0-0 11.h3 Nc5 12.Nb3; E5) 6...Nc6 7.Nc6 (7.c4 Qf6 8.cd5 ed5 9.Qb3 0-0-0 10.Nf5 Qf5 11.Bd3 Qe6 12.0-0) 7...bc6 8.h3 Qg5 9.Nc3 Bd6 10.g4 Bg6 11.Be2 Qh4 12.Na4.

5.Be2 Nc6 6.a3 f6 7.d3 Bd6 8.Nbd2 g5 (better is 8...Nh6!?=) 9.Ng5!+/– e5 (9...fg5 10.Bh8 Pinning (10.Bh8 Deflection)) 10.Bh5 Bg6 11.Bg6 hg6 12.Ngf3 Qe7 13.Qe2 f5 (13...e4 14.Nd4 ed3 15.cd3 Nd4 A) 16.ed4?! Kd7= (16...Bh2? 17.Nf3+-; worse is 16...Rh2 17.Rh2 Bh2 18.g3+/–); B) 16.Bd4+=) 14.h3 (14.c4!? dc4 15.dc4+/–) 14...Nf6+= 15.Ng5 Nh5 16.h4 0-0-0 17.0-0-0 a5 18.b5 Ba3? (better is 18...Na7 19.g4 Nf6 20.gf5 Ba3 21.fg6 Nb5=) 19.bc6+- Bb2 20.Kb2 Qb4 21.Ka2 (21.Nb3 a4 22.Ra1 bc6+-) 21...Qa4 22.Kb2 Rd6?? (22...Qb4 23.Nb3 a4+-) 23.Nf7 (23.cb7 Kb7 24.Ra1 Rb6 25.Nb3 Qb5+-) 23...Rc6 24.Nb3 (24.Nh8?? Rc2 25.Kb1 Qa2) 24...Rf8 (24...Re8 25.d4+-) 25.Ne5 Rb6 26.Ng6! Rff6 (26...Rg6 27.Qh5 Remove defender) 27.Ne7 Kb8 (27...Kd8 28.Nd5 Qe8 29.Nb6 Rb6 30.Kc1+-) 28.Nd5 (better is 28.Qh5 Rf8 29.Nd5 Ra6+-) 28...Rfc6 29.Nb6 Rb6 30.Qh5 Qb4 31.Kc1 a4 32.Qh8 Ka7 33.Na1 a3 34.Qd4 Qb5 35.Nb3 Ka8 36.h5 a2 37.h6 Ra6 38.Qa1 f4 39.h7 Ka7 40.h8Q fe3 41.fe3 Qb4 42.Qad4 Qd4 43.Qd4 b6 44.Rh7 Kb7 45.Qd5 Kb8 46.Qd8 Kb7 47.Qc7 Ka8 48.Rh8 1–0. The Word – omega3i, ChessWorld.net, 2012.

5.Be2 Nd7 6.0-0 Ngf6 (6...Bb4 7.Bg7 Bc2 8.Qc2+-) 7.a3 c6 (7...Bd6 8.Nd4=) 8.d3 (8.Nd4 Be4+=) 8...Bd6= 9.Nbd2 (9.Nd4 Qc7 10.f4 0-0+=) 9...Rg8 (9...0-0 10.c4=) 10.Rc1 (10.Nh4 Qc7 11.f4 a5+=) 10...g5 (10...a5 11.Rb1=) 11.Nd4+= Qc7 12.h3 Bg6 13.c4+= h5 14.cd5 Nd5 15.Bh5 Bh5 16.Qh5+/– 0-0-0? 17.Rfd1 g4+/– 18.hg4 N7f6 19.Qh3 Rh8 20.Qf3+/– Rh6 21.b5 Rdh8 22.g3 Rh1 23.Qh1 Rh1 24.Kh1 Bg3?? 25.Nc6 Qd6?? 26.Bf6 Nf6 27.Ne4 Qf8 28.Ne5 Kd8 29.Ng3 (29...Qa3 30.g5+-) 1–0. Cruz,Christian – Zamarbide Ibarrea,Daniel, Wch U10 Heraklion, 2002.

5.Be2 Nf6 6.a3 c5 (6...Bd6 7.Nh4=) 7.bc5 Bc5 8.0-0 Nbd7 9.d4 (9.Nh4 Be4=) 9...Bd6 10.c4 dc4 11.Bc4 Rc8 12.Bd3 Bg4 (12...Bd3 13.Qd3 Nc5 14.Qd1=) 13.h3= Bh5 14.g4 (14.Nbd2=) 14...Ng4 (better is 14...Bg6=+) 15.hg4+= Bg4 16.Kg2 (16.Nbd2 b5+=) 16...Qf6 17.Be2?? (17.Rh1 Bf5 18.Rh5 Bd3 19.Qd3 g6+=) 17...Qg6?? (better is 17...Bf3 18.Bf3 Rc2-+) 18.Rg1 (18.Nh4 Qe4 19.Bf3 Bf3 20.Nf3=) 18...Bf5 (18...Rc2 19.Nh4 Qe4 20.f3 Bf3 21.Nf3 Rb2=) 19.Kf1+= Bh3 (19...Qf6 20.Nbd2 Rc2 21.Rc1 Rc1 22.Qc1+-) 20.Ke1+/– Qf5 (20...Qc2!? 21.Qd2 g6+/–) 21.Nbd2 (better is 21.Rg7 h5 22.Nc3+-) 21...0-0? (better is 21...g6+-) 22.e4 Qa5 23.d5 (23.Ng5 Bh2 24.Nh3 Bg1 25.Ng1 Rfd8+-) 23...e5? (better is 23...f6 24.Nd4 ed5+-) 24.Rg3+- Rc2 (24...Bf5 25.ef5 Rc5 26.Kf1 Rd5 27.Bc4+-) 25.Rb1 (better is 25.Qc2 Bf5 26.ef5 Qd5 27.Rd1+-) 25...Rfc8 (25...Rb2 26.Rb2 (26.Rh3?! Rb1 27.Qb1 b5+/–) 26...Bf5 27.ef5+- (27.Rb7?! Nc5+-)) 26.Rh3 Nc5 (26...b5+-) 27.Qc2 Rc7 (27...f6 28.Nh4+-) 28.Qd1 (better is 28.Ne5 Nd7 29.Nec4 Bf4+-) 28...Ne4 29.Rc1 (29.Be5 f6 30.Bd6 Nd6+-) 29...Qb6 30.Ne4 Qb2 31.Rc7 Bc7 32.d6 Ba5 33.Kf1 (33...b5 34.Nfg5+-) 1–0. var – shooin, Live Game Caissa's Web, 2004.

6.a3!?= A) 6...Nf6 7.Be2 (7.h4 h5 8.Bd3 Bd3 9.cd3 c5 10.bc5 Bc5 11.0-0 0-0 12.Nb3; 7.Nc3 e5 8.Nf3 Nc6 9.Be2 Bd6 10.0-0 Qd7 11.h3 e4 12.Nh4; 7.Bd3 Bd3 8.cd3 c5 9.bc5 Bc5 10.0-0 0-0 11.Nc3 Bd4 12.ed4) 7...c5 8.bc5 Bc5 9.Nc3 Nc6 10.Nc6 bc6 11.0-0 0-0 12.Rb1; B) 6...Ne7 7.Bd3 (7.h4 h5 8.Nc3 Nbc6 9.Nde2 Nf5 10.Nf4 Nh4 11.b5 ab5 12.Nb5; 7.b5 Nf5 8.Nf5 Bf5 9.Nc3 ab5 10.Nb5 Nd7 11.c4 c6 12.Nd4; 7.Nc3 Nbc6 8.Nf3 Nf5 9.Bd3 Be7 10.e4 de4 11.Be4 0-0 12.0-0 ; 7.Nf3 Nbc6 8.Nc3 Nf5 9.Ne2 Bd6 10.Nf4 0-0 11.Bd3 Bf4 12.ef4; 7.Nb3 Nbc6 8.Nc3 Nf5 9.Bd3 a5 10.Na5 Na5 11.ba5 Ra5 12.0-0; 7.Be2 Nbc6 8.0-0 Nd4 9.Bd4 Nc6 10.Bb2 Bd6 11.Nc3 0-0 12.f4) 7...e5 8.Nb3 Nbc6 9.Nc3 Nf5 10.0-0 Be7 11.f4 e4 12.Be2; C) 6...Nd7 7.h4 (7.c4 Ngf6 8.Nc3 Ne5 9.Qb3 Nc4 10.Bc4 dc4 11.Qc4 Rc8 12.Qb3; 7.Nc3 Ngf6 8.Be2 e5 9.Nf3 a5 10.ba5 Ra5 11.0-0 Be7 12.d4; 7.Be2 Ngf6 8.Nc3 e5 9.Nb3 Bd6 10.Na5 Rb8 11.h4 h5 12.0-0; 7.f4 a5 8.Nc3 Ngf6 9.b5 Bc5 10.Be2 0-0 11.0-0 Qe7 12.Bf3; 7.g3 Ngf6 8.Nc3 Bd6 9.Be2 0-0 10.0-0 Qe7 11.f4 c6 12.Rb1; 7.Bd3 Ngf6 8.Nc3 e5 9.Nb3 c5 10.Bg6 hg6 11.bc5 Nc5 12.0-0) 7...h5 8.Nc3 Ngf6 9.Bd3 Bd3 10.cd3 a5 11.Qb3 ab4 12.ab4; D) 6...Qd7 7.h4 (7.c4 Nf6 8.cd5 ed5 9.Nc3 Be7 10.Be2 0-0 11.Qa4 Qa4 12.Na4; 7.Be2 Nc6 8.Nc3 Nf6 9.0-0 Nd4 10.ed4 Bd6 11.Bd3 0-0 12.Qe2; 7.Nc3 Nf6 8.Nce2 c5 9.bc5 Bc5 10.Nf4 Nc6 11.Nc6 Qc6 12.Ng6; 7.Bd3 Nf6 8.Qf3 e5 9.Bf5 Qd6 10.Nb3 Nc6 11.Nc3 Bf5 12.Qf5; 7.b5 Nf6 8.Nc3 Bd6 9.h4 c5 10.Nf3 ab5 11.Nb5 Nc6 12.Nd6) 7...Nc6 8.h5 Be4 9.Nc6 Qc6 10.d3 Bf5 11.g4 Bg4 12.Qg4; E) 6...Nc6 7.Nc6 (7.Be2 Nf6 8.Nc6 bc6 9.Nc3 Bd6 10.0-0 0-0 11.f4 a5 12.b5; 7.Bd3 Nf6 8.Nc6 bc6 9.Nc3 a5 10.b5 Rb8 11.a4 Bd3 12.cd3; 7.h4 Nd4 8.Bd4 Nf6 9.Nc3 a5 10.ba5 Ra5 11.Rb1 Qc8 12.h5) 7...bc6 8.Nc3 Nf6 9.Bd3 a5 10.b5 Bd3 11.cd3 Rb8 12.Qa4.

6.Nc3 Bb4 7.h4 (7.a3 Bd6 8.h4 c5 9.Nb3 Nf6 10.h5 Bf5 11.Be2 Nc6 12.g4; 7.g3 Nf6 8.a3 Bd6 9.Bd3 c5 10.Nf3 Nc6 11.0-0 0-0 12.Bg6; 7.Be2 Nc6 8.Nc6 bc6 9.Nb5 Nf6 10.Bf6 gf6 11.Nd4 c5 12.a3; 7.Bd3 Nf6 8.a3 Bd6 9.0-0 Nc6 10.Nc6 bc6 11.Rb1 0-0 12.Qe2; 7.Qf3 Nf6 8.a3 Bd6 9.Qh3 Nc6 10.Bd3 Bd3 11.Nc6 Qd7 12.cd3; 7.h3 Nf6 8.a3 Bd6 9.Bd3 c5 10.Nf3 Nc6 11.0-0 0-0 12.Qe2; 7.Rb1 Nf6 8.Nce2 Nbd7 9.Nf4 0-0 10.Nf3 Qe7 11.Ng6 fg6 12.Bf6) 7...e5 8.Nf3 Nc6 9.h5 Bf5 10.a3 Be7 11.d4 e4 12.Ne5.

6.c4 A) 6...Ne7 7.Nc3 (7.Qa4 Nd7 8.c5 Nf5 9.Na3 Nd4 10.Bd4 a5 11.c6 bc6 12.Qc6; 7.Na3 Nbc6 8.Qa4 Qd7 9.Nf3 Ra7 10.c5 h5 11.Be2 Nf5 12.Nc2) 7...Nbc6 8.Qa4 Qd7 9.Nf3 Ra7 10.d3 Nf5 11.cd5 Nb4 12.Qd7; B) 6...Nf6 7.Nc3 (7.cd5 Nd5 8.a3 e5 9.Nf3 e4 10.Ne5 Nd7 11.Ng6 hg6 12.Nc3; 7.Be2 Nbd7 8.Nc3 dc4 9.Bc4 Bb4 10.0-0 0-0 11.Qb3 c5 12.Nf3; 7.Na3 Be7 8.Be2 0-0 9.0-0 Bb4 10.Nac2 Bd6 11.f4 Nbd7 12.f5) 7...e5 8.Nf3 Nc6 9.cd5 Nd5 10.a3 Nc3 11.Bc3 Qd5 12.d4.

6.Qg4 Nf6-/+ (6...Bb4? 7.Ne6 fe6 8.Bg7+- (8.Qb4?! Ne7+/–); 6...Nd7 7.Nc3 (7.Bd3 Ne5 8.Qe2 Nd3 9.cd3 Nf6 10.a3 a5 11.ba5 Ra5 12.a4; 7.Qh3 Bb4 8.a3 Bc5 9.Nc3 Ngf6 10.Be2 Bd6 11.Rc1 c5 12.Nb3; 7.a3 Ngf6 8.Qh3 a5 9.b5 Bd6 10.Nc3 0-0 11.Be2 e5 12.Nf5; 7.Be2 Ngf6 8.Qh4 Ne4 9.Qd8 Rd8 10.a3 Nef6 11.f4 c5 12.bc5; 7.Qg3 Bb4 8.Ne6 fe6 9.Bg7 Bd6 10.f4 Be7 11.Qh3 Bf6 12.Bh8) 7...Ngf6 8.Qh4 e5 9.Nf3 Qe7 10.a3 d4 11.ed4 ed4 12.Ne2) 7.Qh4 Be7 (7...Bd6 8.Nc3 e5 9.Nb3 Nc6 10.Nc5 Qe7 11.Nb7 Nb4 12.Nd6) 8.Be2 (8.Bd3 Ne4 9.Qh3 Bb4 10.f3 Ng5 11.Ne6 Nh3 12.Nd8) 8...0-0 9.0-0 Ne4 (9...e5 10.Nf3 Nc6 11.a3 Qd6 12.Qh3) 10.Qh3 (10.Qg4 Nc6 11.Nc6 bc6 12.a3) 10...Bb4 (10...Qd6 11.d3 Ng5 12.Qg4) 11.d3 Nf6 12.f4 (12.a3-/+) 12...c5 13.f5 cd4 14.fg6 hg6 15.Qh4 (15.Bd4!? Nbd7 16.Rf4-/+) 15...Nc6 16.Rf3 Nh7 17.Qg4 (17.Qd8 Rfd8 18.ed4 Rac8-/+) 17...Qg5 (17...de3 18.c3 Bc5 19.Qg3-+) 18.Qh3 (better is 18.Qg5!? Ng5 19.Rg3-+) 18...de3 19.Rg3 (19.c3 Bd6-+) 19...Qf5 20.Qf5 ef5 21.c3 f4 22.Rg4 Bd6 23.d4 Nf6 24.Rh4 g5 25.Rh3 g4 26.Rh4 g5 (26...g5 27.Rg4 Ng4 28.Bg4 f5-+) 0–1. Petrushin,Alexandr (2470) – Choba,Yulia (1845), Sun Pawn Open, Ilichevsk UKR, 2007.

6.h4 A) 6...Nc6 7.Nc6 (7.h5 Be4 8.Nc6 bc6 9.d3 Bb4 10.c3 Bd6 11.de4 Rb8 12.Qc2) 7...bc6 8.h5 Be4 9.d3 Bf5 10.g4 Bb4 11.Nd2 Nf6 12.gf5; B) 6...Nf6 7.h5 Be4 8.d3 Bf5 9.Nc3 Nc6 10.Nf5 ef5 11.a3 Qd7 12.d4; C) 6...Nh6 7.h5 (7.c4 e5 8.Nf3 Nc6 9.Ne5 Qf6 10.Nd3 d4 11.b5 ab5 12.cb5; 7.a3 Qd7 8.h5 Bf5 9.Nf5 Nf5 10.g4 Nh6 11.c4 Nc6 12.Nc3) 7...Bf5 8.Nf5 Nf5 9.g4 Nh6 10.a3 Nc6 11.Nc3 f5 12.gf5; D) 6...h5 7.Bd3 (7.c4 Nf6 8.Nc3 e5 9.Nf3 Nc6 10.cd5 Nd5 11.a3 Nc3 12.Bc3; 7.Nc3 Nc6 8.Nc6 bc6 9.a3 Nf6 10.Bd3 Bd3 11.cd3 Bd6 12.Ne2 ; 7.b5 Nf6 8.Nc3 Bc5 9.Nb3 Bd6 10.Be2 c6 11.a4 0-0 12.0-0) 7...Bd3 8.cd3 Ne7 9.Qa4 Qd7 10.b5 c5 11.Nb3 Qb5 12.Nc3; E) 6...e5 7.Nf3 Nc6 8.Ne5 Nb4 9.Ng6 hg6 10.a3 Nc6 11.c4 dc4 12.Bc4.

5.Na3?? Qd6?? (better is 5...Nf6-/+) 6.Nb5+- (6.Bg7?! Ba3 7.Bh8 Nc6+-) 6...Qc5?! (6...Qc6 7.Nfd4 Qd7 8.Nf5+-) 7.a3 (7.Bd4 Qe7 8.Bg7 a6+-) 7...Ba5? (7...Bd2 8.Qd2 f6+-) 8.Ne5 (better is 8.Bg7 Nc6 9.Bh8 Qc2 10.Qc2 Bc2 11.Nfd4 Nd4 12.Bd4+- (worse is 12.ed4 Kd7+-)) 8...Qc2?? (better is 8...f6 9.Nf3 Bc2+= (worse is 9...Qc2 10.Qc2 Bc2 11.Rc1+=)) 9.Qc2+= Bc2 10.Be2?? (better is 10.Nc4!? dc4 11.Bg7+=) 10...a6 (10...Ba4 11.Rc1 Bb5 12.Bb5 c6 13.Bd3-+) 11.Nc3? (11.Nd4!? Ba4 12.Nd3-/+) 11...Bc3 (11...Nf6 12.Rc1 Bb3 13.Nf3-+) 12.Bc3-/+ Ne7 (12...f6 13.Rc1 Bf5 14.Bh5 g6 15.Be2-+) 13.0-0 (13.Rc1 Ba4-/+) 13...Ba4 (13...f6 14.Nf3-+) 14.f4 (14.Rab1 Bb5 15.Bb5 ab5 16.Rb5 b6-/+) 14...Nd7 (14...f6!? 15.Nf3-/+) 15.Nd7 Bd7 (15...Kd7 16.Bg7 Rhg8-/+) 16.a4 (16.Rab1 b5 17.Bg7 Rg8+=) 16...0-0-0 (16...f6 17.Rfb1 b6 18.g4-+) 17.a5? (better is 17.Bg7!? Rhg8 18.Be5+=) 17...Rhg8 (17...f6 18.Rab1-+) 18.Bd4 (18.Rab1 Nc6-/+) 18...Kb8 (18...Nf5 19.Bc5-+) 19.Rab1-/+ g5?? (better is 19...Ka8-/+) 20.Ba6+- Bc6 21.Bb5?? (better is 21.Bb7 Bb7 22.a6+-) 21...Bb5= 22.Rb5 gf4 (22...c6 23.Rb6 Nc8 24.Rb4 gf4 25.Rf4=) 23.Rf4 (23.Rfb1 Nc6 24.Bf6 fe3 25.Rb7 Kc8 26.Bd8 Rd8 27.de3 Na5 28.Rb8 Kd7 29.Rd8 Kd8 30.Rb8 Ke7 31.Kf2=) 23...Nc6 (23...c6 24.Rb6 Nc8 25.Rf7 Nb6 26.Bb6=) 24.Bf6 (24.a6 b6 25.Bb6 cb6 26.Rf7 Ne5 27.Rb6 Ka8 28.Rh7 Rb8 29.Rb8 Rb8=) 24...e5 (better is 24...Rd6+=) 25.Ra4 (better is 25.Rf5 Rd6 26.Be5 Ne5 27.Re5+=) 25...Rd6-/+ 26.Bh4 Rdg6 (26...Ka7!?-/+) 27.Bg3+= h5 (27...Rd8!?+=) 28.a6+= b6 29.h4?? (better is 29.Rd5 Rd6 30.Rd6 cd6 31.Ra3=) 29...Rg3-+ 30.a7 (30.Rd5 Rg2 31.Kf1 R8g4 32.Rg4 Rg4-+) 30...Na7 31.Rd5 Rg2 32.Kf1 Rg1 (32...Nc6 33.Rc4 Kb7 34.Rd7-+) 33.Kf2 (33.Ke2 Nc6-+) 33...R8g2 (33...Nc6 34.Rc4 R1g2 35.Kf1-+) 34.Kf3 Rg3 (34...Nc6 35.Rc4 Kb7 36.Rc6 Kc6 37.Re5 Rd2 38.Rh5 Rf1 39.Kg3-+) 35.Kf2 (35.Ke2 Nc6-+) 35...R1g2 (35...Nc6 36.Ke2-+) 36.Kf1 (36.Ke1 Nc6-+) 36...Rh2 (36...Rh2 37.Re5 Rd2-+) 0–1. saetta – Parini, ICS, 1999.

5.Bg7+- c6 6.Bh8 f6 7.Nh4 Qb6 8.Qh5 (8...Bg6 9.Ng6 hg6 10.Qg6 Ke7 11.Qg7 Kd6 12.Qg8) 1–0. Plock – Dehlen, blitz 1996.

5.Bg7+- Nc6 6.Bh8 a6 7.Be2 +-.

5.Bg7+- Nc6 6.Bh8 f6 7.Bb5 Qe7 8.Nd4 0-0-0 9.Bc6 bc6 10.Nc6 Qf8 11.Nd8 Qd8 12.c3 Be7 13.Qa4 Be4 14.f3 Bg6 15.Qa7 Nh6 16.Qa8 Kd7 17.Qd8 Kd8 18.a4 Nf7 19.Bg7 h6 20.a5 e5 (20...Kc8 21.Ke2+-) 21.a6 Ba3 22.Na3 Bb1 23.Nb1 Ng5 24.a7 Nf3 25.gf3 (25…f5 26.a8Q Kd7 27.Qd5 Ke7 28.Bf8 Kf6 29.Ra6 c6 30.Rc6 Kg5 31.Rg1 Kh5 32.Rh6) 1–0. Bonetti,Shane – schmanderson, ICC, 2002.

5.Bg7+- Nc6 6.Bh8 f6 7.Nd4 Nd4 8.ed4 Qd6 9.c3 Ba5 (9...Kf7 10.cb4 Ne7 11.Bf6 Kf6 12.g4+-) 10.Qa4 (10.Qa4 Kf7 11.Qa5+-) 1–0. DEFFM – sylwild, freechess.org, 2018.

5.Bg7+- Nc6 6.Bh8 f6 7.Nh4 Bg6 8.Ng6 hg6 9.Qg4 Qe7 (9...Kf7 10.a3 Nh6 11.Qf4+-) 10.Bb5 (10.Qg6 Qf7 11.Qf7 Kf7+-) 10...g5 (10...Kf7 11.Bc6 bc6 12.Qh3+-) 11.h4 0-0-0 (11...a6 12.Bc6 bc6 13.hg5 fg5 14.Bd4+-) 12.Bc6 (better is 12.hg5 fg5 13.c3 Bd6+-) 12...Nh6 (12...bc6 13.hg5 fg5 14.Nc3+-) 13.Qd4 Rh8 (13...Nf5 14.Qf6 bc6 15.hg5+-) 14.Qa7 (14...bc6 15.Qa8 Kd7 16.Qh8+-) 1–0. pcmvr (2760) – chips (2340), net–chess.com, 2006.

5.Bg7+- Bg4 6.Bh8 f6 (6...Nd7 7.h3 Bf5 8.Bd4+-) 7.h3 (7.c3 Bf3 8.Qf3 Be7+-) 7...Bf3 (7...Bh5 8.Bb5 Nd7 9.a3+-) 8.Qf3 Nc6 (8...Kd7 9.Qg4 Qf8 10.Be2+-) 9.Qh5 Kd7 10.Qh7 Kc8 11.Be2 d4 12.0-0 b6 13.Ba6 Kb8 14.Qe4 Qd6 15.ed4 Nge7 16.Bf6 Bd2 17.Be7 Qe7 1–0. Mico,Diego – Martinez,Anselmo, Alzira op, 1993.

5.Bg7+- h6 6.Bh8 f6 (6...Nc6 7.Nc3+-) 7.Nd4 Qe7 8.Qh5 Kd8 (8...Qf7 9.Nf5 ef5 10.Qf5+-) 9.Nf5 ef5 10.Qf5 Nd7 11.a3 Bd6 12.Bd3 Be5 (12...Qf7 13.Nc3 c6 14.Qh7 Qh7 15.Bh7+-) 13.c3 (better is 13.Ra2 Qf7 14.f4 Bd6+-) 13...Nf8 (13...Qf7 14.f4 Bd6 15.Rg1+-) 14.0-0 (better is 14.f4 Bd6 15.Qd5 Qe6 16.Qb7 Rc8+-) 14...c6 (14...Qf7 15.f4 Bd6 16.Rf3+-) 15.Bc2 (better is 15.f4!? Bd6 16.c4 dc4 17.Bc4 Kc7+-) 15...Kc7 16.d4 Bd6 17.a4 (better is 17.Nd2!? Qe6+-) 17...Qf7 18.Nd2 (better is 18.g4 Ne7 19.Qf6 Qg8+-) 18...Be7 (18...Ne7 19.Qf6 Qh5+-) 19.e4 h5 (19...Qg6 20.Qf4 Kc8 21.Rfe1+-) 20.Bd1 (better is 20.Qf4 Kd8 21.ed5 Qd5+-) 20...Nh6 (20...Qg6 21.Bh5 Qf5 22.ef5+-) 21.Qf4 Bd6 22.Qh6 Nh7 (22...Ng6 23.Bh5 Rh8 24.Qh8 (24.Bg6?! Rh6 25.Bf7 Bh2 26.Kh1 Bf4 27.Bh5 Rh5 28.Kg1 Bh2 29.Kh1 Bd6 30.Kg1 Bh2 31.Kh1 Bd6 32.Kg1 Bh2=) 24...Nh8 25.Bf7 Nf7 26.Rfe1+-) 23.Qh5 (better is 23.Bh5 Qe7 24.Qg7 Qg7 25.Bg7 Rg8+-) 23...Qh5 24.Bh5 Rh8 25.h3 (better is 25.f4 Nf8 26.Bg4 b6+-) 25...Ng5 26.Bf3 (26.Bg4 Bf4 27.Rfd1 Bd2 28.Rd2 Ne4+-) 26...Rg8 (26...Bf4 27.Rfd1 Bd2 28.Rd2 Nf3 29.gf3 de4 30.fe4 Rh3 31.Rc1+-) 27.Bg4 Rf8 (27...Bf4 28.Rfd1+-) 28.f4 Nf7 (28...Ne4 29.Ne4 de4 30.Bf5+-) 29.e5 fe5 (29...Be7 30.Rab1+-) 30.fe5 Be7 31.Bh5 Ng5 (31...Nh6 32.Rf8 Bf8 33.g4+-) 32.Rf8 Bf8 33.Rf1 Ne6 (33...Be7 34.Bg4 Kd8 35.h4+-) 34.Bg4 Bh6 35.Be6 (better is 35.Rf7!? Kb8 36.Nf3 Nc7+-) 35...Bd2 36.c4 (36.Rf3 Kd8+-) 36...dc4 (36...Be3 37.Kh2 Bd4 38.Rf5 dc4 39.Bc4+-) 37.Bc4 (37.Rf7 Kd8 38.Bc4 Bc3+-) 37...a6 (37...Be3 38.Kh2 Bd4 39.Rf7 Kc8 40.e6+-) 38.Kf2 b5 39.ab5 (39.Ke2 Bc3 40.ab5 cb5+-) 39...cb5 (39...ab5 40.Ke2 Bb4 41.Rf7 Kd8 42.Be6+-) 40.Ke2 Bb4 41.Rb1 (better is 41.Bd5 Be7+-) 41...Ba5 42.Ra1 (better is 42.Bb5 Bb6 43.Rc1 Kd8 44.Ba6 Kd7+-) 42...Bc3 43.Rc1 Ba5 (43...Bb2 44.Rc2 Bd4 45.Bb5 Kb6 46.e6+-) 44.Bb5 Kb6 45.Ba6! Ka6 46.Ra1 Kb6 47.Ra5! Ka5 48.h4 Kb6 (48...Kb5 49.Kd3 Kc6 50.h5 Kd7 51.h6 Kc6 52.h7 Kb5 53.Ke2 Kc6 54.h8Q Kc7 55.Qh7 Kc6 56.e6 Kb5 57.e7 Ka5 58.e8Q Kb6 59.Qb1 Kc7 60.Qbb8) 49.h5 Kc6 (49...Kb5 50.h6 Kc4 51.h7 Kd4 52.e6 Kc5 53.e7 Kb5 54.e8Q Ka5 55.h8Q Kb6 56.Qd4 Ka6 57.Qed7 Ka5 58.Q7a4) 50.h6 Kd5 (50...Kb6 51.h7 Kb5 52.h8Q Kc6 53.Qf6 Kb5 54.e6 Kc6 55.e7 Kd7 56.d5 Kc7 57.Qc6 Kb8 58.e8Q Ka7 59.Qea8) 51.h7 Kd4 52.e6 Kd5 53.h8Q (53.e7 Kc6 54.e8Q Kb6 55.h8Q Kc5 56.Qhe5 Kb4 57.Q8b5 Ka3 58.Qeb2) 53...Ke6 54.Qe8 Kd6 55.Ke3 Kd5 56.Qe7 Kc6 (56...Kc4 57.Qd6 Kc3 58.Qc6 Kb4 59.Kd3 Kb3 60.Qb6 Ka2 61.Kc3 Ka3 62.Qb3) 57.Qd8 (57.Kd4 Kb6 58.Qd7 Ka5 59.Kc5 Ka6 60.g4 Ka5 61.Qb5) 57...Kc5 (57...Kb7 58.g4 Kc6 59.g5 Kc5 60.g6 Kc4 61.g7 Kc3 62.Qd4 Kc2 63.g8Q Kc1 64.Qg2 Kb1 65.Qgb2) 58.Qd7 Kc4 (58...Kb4 59.Qd6 Kc3 60.Qc6 Kb2 61.Kd3 Kb3 62.Qb6 Ka3 63.Kc3 Ka4 64.Qb4) 59.Qd6 (59.Qc6 Kb3 60.Kd3 Kb4 61.Qb6 Ka4 62.Kc4 Ka3 63.Qb3) 59...Kc3 60.Qc6 1–0. Khomushku,Ajush – Pavlutskiy,Andrey, Novokuznetsk RUS, SFO Ch U15 (b), 2014.

5.Bg7+- Nh6 6.Bh8 f6 7.c3 Bd6 8.Be2 Nf7 9.Bf6 Qf6 10.0-0 Nc6 11.Bb5 Ng5 12.Bc6 bc6 13.Ng5 Qg5 14.f4 Qg6 15.d4 Be4 16.g3 h5 17.Nd2 Bf5 18.Nf3 Bg4 19.Qa4 Kd7 20.Ne5 Be5 21.fe5 h4 22.Kg2 Bf5 23.c4 Be4 24.Rf3 Bf3 25.Kf3 Rf8 26.Kg2 hg3 27.Qd1 gh2 28.Kh1 Qe4 0–1. valpa – fighter, playchess.de, 2002.

6.Bh8 Nd7 7.Bb2 c6 8.Be2 Qc7 9.0-0 f6 (9...e5 10.Nc3+-) 10.Nh4 0-0-0 11.Nf5 Nf5 12.c4 Rg8 (12...Bd6 13.g3+-) 13.cd5 ed5 14.f4 (14.Bg4 Nh4+-) 14...Nh4 15.Bf3 (15.Rf2 Ng6+-) 15...Nc5 (15...Bc5 16.Kh1+-) 16.Bf6 Nf3 17.Qf3 Ne4 18.Be5 Qa5 (18...Bd6 19.Bd4 Kb8+-) 19.Qh3 Kd8 20.Nc3 (better 20.d3 Bd6 21.de4 Be5 22.fe5 Qc5+-) 20...Nd2 21.Bf6 Ke8 22.Qe6 Kf8 23.Rf2 Nc4 24.Rb1 Bd6 (24...Nb6+-) 25.Rb7 (25.Rb7 Qc7 26.Rc7 Rg2 27.Rg2 Bc7 28.Rg8) 1–0. GuestDVXC – GuestHTMV, freechess.org, 2017.

6.Bh8 Ng6 7.Bc3 Bc5 8.a3+-.

6.Bh8 Ng6 7.Bc3 Bd6 8.Nd4 Nc6 9.Nf5 ef5 10.Qf3 Qd7 (10...Nce7 11.Qh3+-) 11.Qd5 0-0-0 12.g3 Nge5 (12...Kb8 13.Bg2+-) 13.Bg2 f6 (13...Qe6 14.d4 Nc4 15.0-0+-) 14.0-0 (14.d4 Bb4 15.Qd7 Nd7 (15...Rd7?? 16.de5 fe5 17.Bc6 Bc3 18.Nc3 bc6 19.Ke2+-) 16.Bc6 Bc3 17.Nc3 bc6+-) 14...Qg7 (14...Bb4 15.Qd7 Kd7 16.Rd1+-) 15.d4 Ng4 (15...Bf8 16.Qb5 a6 17.Qe2+- (17.de5?! ab5 18.ef6 Qg6=)) 16.Qf5 (better 16.Nd2 Qe7 17.Qf5 Qd7+-) 16...Kb8 (16...Qd7 17.Qd7 Rd7 18.Nd2+-) 17.Bc6 bc6 18.Nd2 Rg8 19.Rab1 Ka8 20.Qe6 h5 21.Qb3 (21.Qb3 Bb4 22.Qb4 Ne3 23.Qb7) 1–0. DEFFM – GuestHTXD, freechess.org, 2019.

6.Bh8 Ng6 7.Bc3 Bd6 8.Nd4 Nc6 9.Nf5 ef5 10.Qh5+-.

6.Bh8 Ng6 7.Bc3 Bd6 8.Nd4 Qf6 9.Qe2 Nd7 10.g4+-.

6.Nd4 Kf7 7.Nf5 ef5 8.Bh8 Nh6 9.Qh5 Kg8 10.Qh6 Kh8 1–0. marekt – erkan, gameknot.com, 2001.

6.Bh8 Qd7 7.c3 Ba5 8.c4 Nc6 9.Qa4 0-0-0 10.Be2 Qf7 11.0-0 Nh6 12.Bf6 Qf6 13.d4 Rg8 14.Kh1 Qg6 15.Rg1 Ng4 16.g3 Nh2 17.Nh2 (17.Kh2 Qh5 18.Nh4 Qe2 19.Nf5 Qf2 20.Rg2 Qf5-/+) 17...h5 18.Na3 a6 19.Qb3 Ne7 20.Rab1 Bb1 21.Qb1 (better is 21.Rb1!? b6 22.cd5 ed5 23.Ba6 Kd8+-) 21...Qf6 22.Rg2 h4 23.Qg1?? (better is 23.Ng4 Qf8 24.cd5 Nd5 25.Nc4+-) 23...h3-+ 24.c5 hg2 25.Qg2 Qf5 26.Kg1? (better is 26.Qf3!? Qg6 27.Qh5-+) 26...Bb4 27.Nc2?? (27.e4 de4 28.Nc2-+) 27...Qc2 28.Qf3 Qa2 29.Qf7 Kd7 30.Bg4 Qb1 31.Kg2 Qe4 32.Bf3 Qf5 33.Qf5 Nf5 34.g4 Nh4 35.Kg3 Nf3 36.Kf3 a5 37.Nf1 a4 (38.e4 de4 39.Ke4 Rg4 40.Kd3 a3-+) 0–1. Onoprienko,A – Schovanek,Jan, Frymburk Czech–ch U14, 2000.

6.Bh8 Qe7 7.c3 Bd6 8.d4 Nc6 9.Bd3 Be4 10.Be4 de4 11.Nfd2 0-0-0 (11...f5 12.Nc4 0-0-0 13.Qh5+-) 12.Ne4 Nh6 (12...f5 13.Nd6 cd6+-) 13.Bf6 Qf7 (13...Qe8 14.Bd8 Qd8 15.Qh5+-) 14.Bd8 Nd8 15.Qf3 Qg7 (15...Qg6 16.Nd6 cd6 17.Nd2+-) 16.Nbd2 e5 (16...Be7 17.Rb1+-) 17.Nc4 ed4 18.Ncd6 cd6 19.Nd6 Kb8 20.cd4 Qc7 21.Qf8 Ng4 22.0-0 a6 23.Rfc1 Qd7 (23...Nf6 24.Rc7 Kc7 25.Nb7 Kd7 26.Nc5 Kc8 27.Qf6 Kc7 28.Qe7 Kb8 29.Qd8 Ka7 30.Rb1 h6 31.Rb7) 24.Nb7! Qb7 (24...Kb7 25.Rab1 Pinning; 24...Qb7 25.Qd8 Mate attack) 25.Rab1 (25.Rab1 Qb6 26.Qd8 Ka7 27.Rb6 Ne3 28.Qb8) 1–0. Pierre – Mascarone, internet, 2020.

6.Bh8 Kf7 7.Nd4 Bg6 8.Qg4 Qd7 9.Bd3 e5 (9...c5 10.a3 cd4 11.ab4 de3 12.fe3+-) 10.Bf5 Qe7 (10...Qd6 11.Be6 Ke7 12.Nf5 Bf5 13.Bf5+- (13.Qg8?! Qe6 14.Qg7 Qf7+=)) 11.Be6 Kf8 12.Bd5 ed4 13.Bb7 de3 14.Qc8 (14.fe3 Qe3 15.Kf1 Qb6 16.Qc8 Ke7 17.Ba8 Bf7+-) 14...Be8 15.fe3 (15.fe3 Qe3 16.Kd1+-) 1–0. Janek – Al Fresco, internet, 2017.

6.Bh8 Kf7 7.Nd4 Nh6 8.Nf5 Nf5 9.Qh5 Kg8 10.Bd3 Qe7 11.g4 Nd6 12.c3 Bc5 13.g5 Kh8 14.gf6 Qf7 15.Bg6 Qf8 16.Qh7 1–0. fraksweden – Cmurillo, ChessWorld.net, 2001.

6.Bh8 Nc6 7.Bb5!? Nd7 +-.

6.Bh8 Nc6 7.Bb5 Be7 8.Ne5 (8.Nd4!? Kd7 9.Nf5 Qh8 10.Ne7 Ke7+-) 8...Qd6 9.Bc6 (9.Nc6 bc6 10.Be2 Rb8+-) 9...bc6 10.d4 Qb4 11.c3 (11.Nd2!? Qc3+-) 11...Qb2 12.Nd2 Qc3 (12...Bc2 13.Qc1 Ba3 14.Qb2 (14.Bf6?! Qc3 15.Qa3 Qa3+-; 14.Nc6 Qc3 15.Bf6 Bc1 16.Rc1 Qc6-/+) 14...Bb2 15.0-0+-) 13.Rc1 Qb2 14.Nc6 (better is 14.Rc6 Ne4 15.Ne4 (< 15.Rc7 Nc3 16.Rc3 Qc3+-) 15...Be4 16.0-0 Qa2 17.Rc7+-) 14...Bd6 15.Bf6 Qa2 16.0-0 Kd7 17.Nf3 a5 18.Ra1 Qc4 19.Nce5 Ke8 20.Nc4 (20...dc4 21.Qa4 Kf8 22.Qc6+-) 1–0. coloplayah (2140) – losertoo (1980), net–chess.com, 2006.

6.Bh8 Nc6 7.Bf6 Qf6 8.c3 Bd6 9.Bb5 h6 (9...Kf8 10.Bc6 bc6 11.Nd4+-) 10.Bc6 (10.Nd4 a6 11.Bc6 bc6+-) 10...bc6 11.d4 Kd7 (11...Ke7 12.Nbd2+-) 12.Nbd2 Rg8 13.g3 Bh3 (13...a6 14.c4 Kd8 15.c5+-) 14.Rg1 (14.e4 Qg6+-) 14...h5 (14...Bg4 15.c4+-) 15.Qc2 (15.e4!? Qe7+-) 15...Bg4 16.Nh4 e5 17.Qa4 ed4 (17...Ra8 18.e4 ed4 19.cd4 (< 19.Qd4 Be5 20.Qd3 Bc3+-) 19...de4 20.Rc1+- (20.Ne4?! Re8 21.Kf1 Re4+/–)) 18.cd4 (18.Qa7?! de3 19.fe3 Qc3+-) 18...Re8 (18...Bc5+-) 19.f3 (better is 19.Rc1 Bf8 20.Rh1+-) 19...Re3 20.Kf2?? (20.Kf1 Bh3 21.Rg2 Bg2 22.Ng2+/–) 20...Rf3?? (better is 20...Ra3 21.Qc2 Qd4 22.Kg2 Rc3=+) 21.Nhf3 h4 22.Rac1 hg3 23.hg3 Kc8 (23...Ke7 24.Qc6 Be6 25.Rb1+-) 24.Rge1 Kd8 (24...Be6 25.Qc6 Kd8 26.Rb1+-) 25.Qc6 Bf3 (25...Be6+-) 26.Qa8 (26.Re8) 26...Kd7 27.Qe8 1–0. Slavisa666 – FlyBiMarc6, Live Game Caissa's Web, 2004.

6.Bh8 Bd6 7.Nd4 +-.

6.Bh8 Nbd7 7.Nd4 Bg6 8.Bb5 a6 9.Bd3 Ne4 (9...Qe7 10.Bf6 Qf6 11.Qf3+-) 10.0-0 (10.h4 h5 11.Ne2 Qe7+-) 10...Bd6 11.f4 Qh4 12.Nf3 Qe7 (12...Qh6 13.Bb2+-) 13.Bb2 Bh5 (13...0-0-0 14.Nc3+-) 14.Nc3 f5 15.Be2 0-0-0 16.Ne4 fe4 17.Nd4 Bg6 (17...Bf7 18.Bc3+-) 18.Bg4 (better 18.Rb1 Rg8+-) 18...Rg8 (18...Bf7 19.f5 Qh4 20.Bh3+- (20.Ne6?? Qh2 21.Kf2 Bg3 22.Ke2 Qg2 23.Rf2 Qf2; 20.fe6?? Qh2 21.Kf2 Bg3 22.Ke2 Qg2 23.Rf2 Qf2)) 19.Be6 Rg7 (19...Bf7 20.Bg4+-) 20.Bd5 c6 (20...Kb8 21.Rb1 Nb6 22.c4+-) 21.Bc6! bc6 (21...Qf7 22.Bd7 Qd7 23.c4+-) 22.Nc6 Qe6 (22...Qf7 23.Bg7 Qg7 24.Qg4+-) 23.Bg7 Kc7 24.Nd4 Qf7 25.Be5! Qe7 (25...Be5 26.fe5 Passed pawn; 25...Ne5 26.fe5 Passed pawn) 26.Bd6 Qd6 27.f5 Bf7 28.Qg4 Bc4 29.Ne6 Kc6 30.Qe4 Bd5 31.Qa4 Kb6 32.Rab1 Ka7 33.Qd4 Ka8 34.c4 (34.c4 Nb6 35.Rb6 h6 36.Rd6 Be6 37.fe6 a5 38.Rd7 Kb8 39.Rf8) 1–0. Pierre – Ledrab, internet, 2020.

6.Bh8 Ne4 7.Bb5 c6 8.Bd3 (8.Be2 Nd7+-) 8...Bg4 (8...Nd7 9.Be2+-) 9.h3 Bh5 10.0-0 (10.g4 Bg6+-) 10...Nd7 11.Be2 Qe7 (11...Bf3 12.Bf3 (worse 12.gf3 Qg5 13.Kh2 Bd6 14.f4 0-0-0+-) 12...Qh4 13.c4+-) 12.c3 (12.d3 Nef6+-) 12...Bd6 13.d3 Nec5 14.Nfd2 (14.Bd4!? e5 15.Bc5 Nc5+-) 14...Be2 15.Qe2 0-0-0 (15...f6 16.d4 Ne4 17.Ne4 de4 18.Qc2+-) 16.Bd4 e5 17.Bc5 Bc5 (17...Nc5 18.c4 d4 19.Qh5+-) 18.Qg4 (18.c4 d4+-) 18...Kb8 (18...Rf8 19.d4 f5 20.Qf3+-) 19.Qf5 (19.a3 Nf6 20.Qf5 Re8+-) 19...Bd6 (19...Qf6 20.Qf6 (20.Qh7?! Rh8 21.Ne4 Rh7 22.Nf6 Nf6+-) 20...Nf6 21.Nf3+-) 20.Qh7 Nf6 (20...Qf6 21.Qh5+-) 21.Qf5 Rg8 (21...Rh8 22.e4+-) 22.a4 (22.c4 e4 23.cd5 ed3+-) 22...Nd7 (22...Rh8 23.e4+-) 23.a5 (23.e4 Rg5 24.Qf3 Nf6+-) 23...Rg5 24.Qf3 Nf6 (24...f5 25.e4+-) 25.a6 (25.e4 Qe6+-) 25...b6 (25...e4 26.de4 de4 27.Qe2+-) 26.c4 (better 26.e4 Rg6+-) 26...Nh5 (26...e4 27.Qe2 Rg2 28.Kg2 Qe5+-) 27.cd5 c5 (27...f5 28.Rc1 c5 29.h4+-) 28.Ne4 (28.h4 e4 29.Ne4 Rd5 30.Nd6 Rd6 31.Qh5 Rd3+-) 28...Rg8 (28...f5 29.Ng5 Qg5 30.Nc3+-) 29.Nd6 (29.Nd6 Nf6 30.Nc4+-) 1–0. DEFFM – GuestJTBV, freechess.org, 2018.

6.Bh8 Ne4 7.Bc3 Nc6 (7...Nc3 8.Nc3 c5 9.Bb5 Kf8 10.Ne2+-) 8.Bb5 (8.Bb4 Nb4 9.d3 Nd6+-) 8...Nc3 9.Nc3 Qd6 10.Ne2 0-0-0 (10...e5 11.Bc6 bc6 12.c3+-) 11.c3 Ba5 (11...Bc5 12.Bc6 Qc6 13.Ned4 Bd4 14.Nd4+-) 12.0-0 (12.Bc6 Qc6 13.Ned4 Qd7+-) 12...a6 (12...Ne5 13.Nfd4 Bg6 14.f4+-) 13.Bc6 Qc6 14.Ne5 (14...Qe8 15.Nd4+-) 1–0. wlittle (2245) – honza (2350), net–chess.com, 2004.

6.Bh8 Ne4 7.Nd4 Bg6+-.

6.Bh8 Ke7 7.Bf6 Kf6 8.c3 Bd6 9.c4 c5 (9...dc4 10.Nc3+-) 10.cd5 ed5 11.Nh4 Qd7 (11...Be6 12.Nc3 Nc6 13.Qh5+-) 12.Nc3 Be6 (12...Bg4 13.Nd5 Kg7 14.Qb3+-) 13.Qh5 Nc6 (13...Kg7 14.Bd3 h6 15.Rb1+-) 14.f4 Rg8 (14...Kg7 15.Bd3 Nb4 16.Qh7 Kf6 17.0-0 Nd3 18.Qd3+-) 15.f5 Bf5 (15...Be5 16.fe6 Qe6+-) 16.Nd5 Ke5 17.Bc4 Ne7 18.Nf3 (18.Nf3 Ke6 19.Nf4 Kf6 20.Qf7) 1–0. Vendelo – Armbor, internet free game, 2018.

6.Bh8 Kf8 7.a3 Ba5 8.Nd4 Bg6 (8...Kg8 9.Nf5 Kh8 10.Ng3+-) 9.Qf3 Ne4 (9...Nbd7 10.Bd3 c6+-) 10.Ne6 Kg8 11.Nd8 Kh8 12.Nf7 (12.Nb7 Bb6 13.d3 Nf2 14.Kf2 Nd7 15.Qd5 Nf6+-) 12...Bf7 13.Qf7 Nc6 14.Qd5 (14.Bd3 Rg8 15.Qd5 Nd6+-) 14...Nd6 15.Qe6 (better 15.Ba6 ba6 16.Qc6 Re8+-) 15...Rd8 16.Qf6 (better 16.h4 Rg8 17.Qf6 Rg7+-) 16...Kg8 17.Qe6 Kh8 18.Bd3 Re8 19.Qh6 Re7 20.Qf8 1–0. GuestTCRW – GuestGVSH, freechess.org, 2020.

6.Bh8 Ng4 7.c3 Bd6 8.Nd4 Bg6 9.Qg4 f6 10.Qe6 Be7 11.Bf6 Nd7 12.Qg8 Nf8 13.Bb5 c6 14.Nc6 Qd6 15.Ne7 1–0. marekt – danieli, GameColony.com, 2002.

5.a3 a6 6.c4 dc4 7.Bc4 b5 8.Bb3 (better 8.Be2=) 8...Bd6?? (better 8...a5=+) 9.Bg7+- Ne5 10.Bh8 Nd3 11.Kf1 f6 (11...c5 12.bc5 Rc8 13.Bc2 Bc5 14.Ne1+-) 12.Nd4 Nh6 (12...Be5 13.Nf5 Ba1 14.Qg4+-) 13.Nf5 Nf5 14.Be6 Nh4 15.Qh5 Ng6 16.Qh7 Nf8 (16...Nde5 17.Bd5 c6 18.Bc6 Nc6 19.Qg6 Kd7 20.Bf6 Ne7 21.Qg4 Kc7+-) 17.Qf7 1–0. GuestSTHN – GuestWLMK, freechess.org, 2017.

5.b5 Na5 6.d3 c6 7.a4 Nf6 8.Nbd2 Bg4 9.Be2 Bd6 10.e4 de4 11.de4 Bf3 12.Nf3 (12.Bf3 Bb4 13.c3 Bd6=) 12...Bb4 (12...Ne4!? 13.Bg7 Bb4 14.Kf1 Rg8=) 13.c3+= Bc5 14.Qc2 Qb6 15.0-0 Ng4 16.Nd4 Nf6 17.Bd3 Rd8 18.e5 (18.Rad1 cb5 19.ab5 Ng4+=) 18...Nd7 (18...Bd4 19.cd4 Nd5 20.Rfc1=) 19.Rfe1+= Nf8 20.h4 (20.Rad1!?+=) 20...Ng6= 21.g3 (21.Re4 Rd5 22.Rae1 cb5 23.ab5 Qc7+=) 21...Ne7 (21...Rd5 22.f4=) 22.Rab1 (22.Bh7? Bd4 23.cd4 g6-+) 22...Bd4 23.cd4 Nd5 (23...cb5 24.Ba3 (24.Bh7? g6-+) 24...Nec6 25.Bb5+-) 24.Qd2 (24.Bc1 cb5 25.Bg5 f6 26.ef6 gf6 27.Rb5 Qd4+-) 24...cb5 25.Bb5 Ke7?? (better 25...Nc6+=) 26.Ba3+- (26.Ba3 Rd6 27.Bd6 Kd8 28.Qg5 Kc8 29.Rec1 Nc6 30.Qg7+-) 1–0. DEFFM – GuestBHWH, freechess.org, 2018.

5.b5 Nb4 6.d3+/– d4 (6...a6 7.a3 ab5 8.ab4 Ra1 9.Ba1 Bb4 10.Nbd2+-) 7.Bd4 (7.a3 de3 8.ab4 Bb4 9.Ke2 Nf6 10.fe3 0-0+-) 7...Bg4 (7...c5 8.Bb2 Bg4 9.c4 Bf3 10.gf3+-) 8.Be2 Nd5 (8...c5 9.Bc3 Nd5 10.0-0+/–) 9.0-0 Nge7 10.Nbd2 (10.h3 Bf3 11.Bf3 Nf5+/–) 10...Nf5 11.Bb2 Nf6 12.Bf6 Qf6+/– 13.Ne4 Qd8 14.h3 Bf3 15.Bf3 Nh4 16.d4 f5 17.Ng3+- Bd6? 18.Bb7 Rb8 19.Bc6 Kf7 20.Ne2 Rf8 21.c4 Kg8 22.c5 Be7 23.Qa4 e5 24.Qa7 e4 25.Nf4 Bg5 26.Ne6 Qe7 27.Nf8 Qf8 28.Qc7 f4 29.ef4 Bf4 30.Qd7 e3 31.Qe6 Kh8 32.fe3 (32...Ng6 33.ef4+-) 1–0. agluis (2010) – bishopbriggs (2105), net–chess.com, 2003.

5.b5 Nb8 6.a4 Nf6 7.Be2 Be7 8.Nh4 Be4 9.d3 Bg6 10.0-0 Nfd7 (10...a6!?=) 11.Bg7+/- Rg8 12.Ng6 hg6 13.Bb2 Bf6 14.d4 Bg7 15.c4 Qh4 16.Nd2 Rh8 17.h3 g5 (17...Qg5 18.Nf3 Qf5 19.Rc1+-) 18.cd5 ed5 19.Rc1 c6 20.Qb3 Nb6 21.a5 N6d7 22.bc6 bc6 (22...Nc6 23.Qb7 Rb8 24.Qc6 Bf8+-) 23.Qb7 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.b5 Nce7 6.c4 dc4 7.Bc4 Nd5 8.0-0 Nb4 9.Nd4 Bd3 10.Bd3 Nd3 11.Bc3 e5 12.Nf3 e4 13.Nd4 Nf6 14.a4 Bc5 (14...Qd5 15.f3=) 15.Qc2 0-0 16.Nb3 Bd6 17.Na5?? (better is 17.f3=) 17...Bh2!-+ 18.Kh1 (18.Kh2 Ng4 Double attack) 18...Ng4 19.g3 Qg5 20.Bd4 (20.Qd3 ed3 21.Kg2-+) 20...Qh6 21.Kg2 (21.Bg7 Qh3 22.Qd3 Bg3 23.Kg1 Qh2) 21…Bg1!! (21...Bg1 22.Rg1 Qh2 23.Kf1 Qf2) 0–1. Hal1958 – Westen, playchess.de, 2002.

5.b5 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6).

5.Bg7 Nc6 6.Bh8 Nb4 7.Nd4+-.

5.Bg7 f6 6.Bh8 Qe7 (6...Nc6 7.Nh4 Bg6 8.b5+-) 7.Nh4 (7.Nc3 h5 8.Nd4 Qh7+-) 7...Bg6 8.Ng6 (8.c4 dc4 9.Na3 Nd7 10.Nc4 0-0-0 11.Nd6 Qd6+-) 8...hg6 9.Qg4 Be5 (9...Nd7 10.Be2+-) 10.d4 Qb4 (10...Bd6 11.a3 Qf7+-) 11.Nd2 Qb2 (11...Qc3 12.Rb1 Ne7 13.de5 Qe5 14.Qh4+-) 12.Qe6 Ne7 13.Rb1 (13.Rb1 Qc3 14.Rb7+-) 1–0. DEFFM – Gmdirham, freechess.org, 2019.

5.a3 a5 =.

5.a3 Ngf6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.a3 Ngf6 6.d4 Bd6 7.c4 c6 8.Nbd2 0-0 9.h3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.d4 Nbd7 7.c4 c6 8.h3 0-0 9.Nbd2).

5.a3 Ngf6 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

5.Bb5 Bb4? 6.Bg7 c6 7.Be2 +-.

5.Bb5 Bb4? 6.Bg7 c6 7.Bh8?! cb5 8.Nc3 Qa5 +-.

5.Bb5 Ngf6 6.a3 c6 =.

5.c4 Bb4?? 6.Bg7 dc4 7.Bh8 +-.

5.c4 f6?? 6.Qb3 (6.cd5 ed5 7.Nd4 Ne7+-) 6...dc4 7.Bc4 Qe7 (7...Nb6 8.Be6 Be6 9.Qe6 Qe7 10.Qe7 Ne7 11.Nc3+-) 8.a3 Nb6 9.Be2 0-0-0 10.Nd4 Nh6 11.Nc3 e5? (better 11...Kb8!?+-) 12.Nf5+- Nf5 13.Bg4 g6 (13...Qd7 14.e4 Kb8 15.Bf5 Qd2 16.Kf1+-) 14.e4 h5 (14...Rd4 15.Bh3 (15.ef5 Rg4 16.Qe6 Qd7-/+) 15...Qd7 16.ef5+-) 15.Bh3 (15.ef5?! hg4 16.fg6 Qg7=+) 15...Kb8 16.ef5 g5 17.f3 Qd7 (17...Rd4 18.g3 g4 19.Bg2+-) 18.Ne4 Be7 19.Rc1 Nd5 20.g3 g4 (20...h4 21.b5+-) 21.fg4 hg4 (21...h4 22.b5+-) 22.Bg4 Rdg8 (22...Qb5 23.Be2 Qb6 24.h4+-) 23.Be2 Rd8 (23...a6 24.Qd3+-) 24.0-0 Bf8 (24...Rhg8 25.d4 ed4 26.Rcd1+-) 25.Bc4 Qh7 (25...Be7 26.b5+-) 26.Rf2 Nf4 (26...Nb6 27.Nf6 Qe7 28.Ng4+-) 27.gf4 Qf5 28.Ng3 Qg4 (28...Qh7 29.fe5 fe5 30.Be5+-) 29.Be6 Qh4 30.fe5 Bh6 31.Rc4 Qg5 32.Rg4 Qg4 33.Bg4 Bd2 34.ef6 Rhe8 35.f7 Re1 36.Kg2 (36.Kg2 a6 37.f8Q Ree8 38.Qbg8 Bh6 39.Qe8 Bg7 40.Qd8 Ka7 41.Qc7 Bf8 42.Rf8 a5 43.Qa5) 1–0. Ddgs – Seer, internet, 2019.

5.c4 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.c4 Ngf6 6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.c4 h6 6.a3 (6.Nd4 Be4 7.cd5 Bd5=) 6...Ngf6 7.d4 (7.cd5 Nd5 8.d3 N5f6=) 7...c6 (7...Be7 8.Be2=) 8.Bd3 (8.Nbd2 Be7=) 8...Bd3 (8...dc4 9.Bc4 Bd6 10.0-0=) 9.Qd3 Bd6 (9...a5 10.c5=) 10.0-0 (10.Nbd2 Qe7=) 10...0-0 (10...dc4 11.Qc4 0-0 12.Nc3=) 11.Nbd2 Re8 (11...Qe7 12.Rfe1=) 12.Ne5 Bc7 (12...Qc7 13.f4=) 13.f4 dc4 14.Ndc4 Nb6 15.Qc2 (15.Nb6 ab6 16.e4 b5+=) 15...Nc4= 16.Qc4 Qd5 17.Qc2 (17.Rac1 Ne4=) 17...Qe4 (17...Red8 18.Rac1=) 18.Qe4 Ne4 19.Nd3 ½–½. Zurita Gutierrez,Antonio (2115) – Claros Egea,Christian (2000), Malaga–ch fin, 2002.

5.Nd4=.

5.Be2 Bb4?? 6.Bg7+- 1–0. Neumann,Frank – Hinestroza,Douglas, RN–2011–0-00434, 2011.

5.Be2 c6 6.0-0 h5 7.Re1 (7.b5!?+=) 7...h4= 8.h3 Be4 (8...Ngf6 9.b5=) 9.a3 a6 10.d3 Bf5 (10...Bf3 11.Bf3 Ngf6 12.Nd2+=) 11.Nbd2+- Ngf6 12.Nd4 (12.c4 Bg6+-) 12...Bg6+= 13.Bg4 (better 13.c4!?+=) 13…Qc7 0–1. alessandrocarvalhaes (1885) – zarkoniotay (1840), lichess.org, 2020.

5.Be2 f6 6.b5 a6 (6...Bc5 7.d4 Bd6 8.c4+=) 7.a4 (7.Nd4 Kf7 8.ba6 ba6+-) 7...Bb4 (7...Bc5 8.ba6 ba6 9.Nc3+=) 8.0-0 (8.Nd4 Kf7+=) 8...Ba5 (better 8...Ne7!? 9.Nd4 Kf7+=) 9.Nd4+- e5 1–0. GuestWVGP – GuestRNGZ, freechess.org, 2019.

5.Be2 Ngf6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

5.Be2 Ngf6 6.Nh4 Bg6 7.b5 Bd6 8.0-0 e5 9.Ng6 hg6 10.c4 Nb6 (10...dc4 11.h3=) 11.c5 (11.cd5 Nbd5 12.h3 Qe7+=) 11...Bc5= 12.Be5 Nc4 13.Bc4 dc4 14.Qa4 Qd5 (14...Qe7 15.Bg3=) 15.Bc7+= 0-0 16.Nc3 Qd3 (16...Qe6 17.Rfd1+=) 17.Rac1+= Rac8 18.Bg3 Nh5 (18...Rfd8!?+=) 19.Nb1+- Ng3 20.hg3 Rfe8 (better 20...Bb6!?+-) 21.Qc4 Qf5 (21...Qd7 22.Qb3+-) 22.Qf4 (22.Qb3!? Bb6+-) 22...Qd3 23.Qc4 Qf5 24.Qb3 Re4 (24...a5 25.ba6! ba6 26.d4+-) 25.d4 Bb6 26.Rc8 Qc8 27.Nd2 Re6 1–0. GuestZNHB – averagesg, freechess.org, 2020.

5.Be2 h6 6.0-0 Ngf6 7.a3 Bd6 8.d4 0-0 9.Nbd2 c6 10.Ne5 Ne4 11.f3 Nd2 12.Qd2 Nb6 13.Rac1 (13.f4 a5=) 13...f6+= 14.Ng4 Na4 (14...a5 15.Ra1+=) 15.Ba1 (15.c4 Nb2 16.Qb2 Qe8=) 15...b5 16.Bd3 Qc7 17.h3 Rfe8 18.Nf2 Nb6 19.e4 (better is 19.Qc3!?+=) 19...Bf4 20.Qe2 Bc1 21.Rc1 Bh7 22.Bc3 Nc4 23.Bc4 dc4 24.e5 (24.Qe3!?-/+) 24...fe5-+ 25.de5 Red8 26.Ne4 Be4 27.Qe4 Rd5 28.Qg4 Qf7 29.f4 Rad8 30.Rf1 g6 31.Qe2 Qd7 32.Qe4 Qf7 33.Rf3?? (33.Qe2 c5 34.bc5 Rc5 35.Qe3-+) 33...Qf5 34.Qe2 h5 35.Kh2 c5 (35...Rd1 36.Qf2-+) 36.bc5-/+ Rc5 37.Bb4 (37.Qf2 Rcd5 38.Qa7 Qc2 39.f5=) 37...Rcd5-+ 38.Bd6 c3 39.Rc3 (39.Qe3!? Qc2 40.Qa7 Rd2+=) 39...Qf4 40.Kh1 Qc1 41.Kh2 Qf4 42.Kh1 Qc1 43.Kh2 Rd1 44.Kg3?? (better is 44.Qe3-+) 44...Qg5 45.Kh2 Rd2 (45...Qf4 46.Rg3 h4 47.Qd1 hg3 48.Kh1 Qe5-+) 46.Qf3-/+ Rd5 (46...Qf5 47.Qe3 Rc2 48.Rc2 Qc2 49.Qa7-+) 47.Rc7 Qf5 (47...Re5?? 48.Qf7 Kh8 49.Qg7) 48.Qe3 ½–½. Eriksen,Tommy – Brattetveit,Kenneth (1630), Sotra op3, 2004.

5.Be2 h6 6.0-0 Ngf6 7.b5 Be7 (7...Bd6 8.Nd4=) 8.c4 (8.Nd4=) 8...c6 (8...dc4 9.Bc4 0-0 10.Nd4=+) 9.bc6 (9.Nd4 Bb1 10.Rb1 c5+=) 9...bc6 10.cd5 (10.Nd4 dc4 11.Nf5 ef5 12.Bc4 Nb6+=) 10...cd5= 11.Nd4 Bh7 12.Qa4 (12.Nc3 Rc8=) 12...Qb6 (12...e5 13.Nc6 Nb6 14.Qd1+/– (14.Nd8 Na4 15.Bb5 Kd8 16.Ba4 Bd3-/+)) 13.Nb3 (13.Ba3 Ba3 14.Na3 e5=) 13...0-0 14.Bd4 Qd8 (14...Qb4 15.Qb4 Bb4 16.Rc1=) 15.Bf6 Bf6 16.d4= Nb6 17.Qa5 Be7 18.N1d2 Nd7 19.Qa6 Qb6 20.Rfc1 Qa6 21.Ba6 Ba3 22.Rc7+= Nb6 23.Nc5 Bb2 24.Rf1 e5 25.Nf3 ed4 26.Nd4+/– Bd4 27.ed4 Bf5 28.Re1 Rfe8 29.Ree7 Re7+= 30.Re7 Kf8 31.Re5 g6 32.Kf1 Re8 33.Re8+= Ke8 34.Ke2 Ke7 35.Kd2 Bb1 36.a3 Ba2 37.Kc3 Bc4 38.Kb4 Ba6 39.Na6 Kd6 40.Nc5 Nc4 41.a4 Kc6 42.Nd3 a5 43.Kc3 g5 44.f4 f6 45.fg5 fg5 46.Ne5 Ne5 47.de5 Kc5 48.g4 d4 49.Kd3 Kd5 50.e6 Ke6 51.Kd4 Kd6 52.h3 Ke6 53.Kc5 Ke5 54.Kb5 Kf4 55.Ka5 Kg3 56.Kb4 Kh3 57.a5 Kg4 58.a6 h5 59.a7 h4 60.a8Q h3 61.Kc4 Kg3 62.Qh1 g4 63.Kd3 Kf2 64.Qh2 Kf3+- 65.Kd2 g3 66.Qh3 Kf2 67.Qh4 Kf1 68.Ke3 Kg2 69.Ke2 Kg1 70.Qg3 (70…Kh1 71.Qg5 Kh2 72.Kf3 Kh3 73.Qg3#; 70.Kf3 g2 71.Qf2 Kh2 72.Qg2#) 1–0. Maksimov,Alexey – Sadykov,Iskander, RUS–ch U16 Kazan, 1997.

5.Be2 h6 6.Nd4 Bh7 7.0-0 e5 8.Nf3 Bd6 9.c4 c6 10.cd5 cd5 11.Bb5 f6 12.d4 e4 13.Ne5 fe5 14.de5 Bb4 15.e6 Ne7 16.Bd7 Kf8 17.Qd4 Rg8 18.Qb4 Bg6 19.Ba3 Be8 20.Be8 Ke8 21.Qb5 Kf8 22.Qb7 Qc8 23.Qe7 1–0. onur604 (2320) – mohammed1968 (2055), lichess.org, 2020.

5.g3 h6 (5...Bb4?? 6.Bg7 Ngf6 7.Bh8+-) 6.Bg2 Ngf6 7.a3 c6 8.0-0 Bd6 9.d3 0-0 10.Re1 Bh7 (10...Qc7 11.c4=) 11.Nbd2 (11.e4 de4 12.de4 Ne4 13.Re4 Be4 14.Qd6 Nf6 15.Qd8 Rfd8=) 11...a5 12.ba5 Ra5 13.Nb3 Ra4 14.e4 Be7 15.e5 Ne8 16.c3 Qa8 17.Nfd4 Nc7 18.Nc2 Nb5 (18...b5 19.Rb1-/+) 19.Nbd4 (19.Qe2 Na3 20.Ba3 Ba3 21.Na3 Ra3=+) 19...Nd4-/+ 20.Nd4 Nc5 21.Bf1 Qa5 22.c4 dc4 (22...Rd8 23.Re3-/+) 23.dc4=+ Qb6 24.Bc3 Rfa8 25.Bb4 Bf8 26.Re3 Qa7 27.Rc1 Rd8 28.Qg4 Qb6 (28...Ne4 29.Bf8 Kf8 30.Nf3=+) 29.h4 (29.Rd1 Bg6=) 29...Raa8 (29...Nd7 30.Bf8 Nf8 31.Nf3-/+) 30.Be2 (30.Rd1 Qa6=) 30...Rac8 (30...Ne4 31.Nf3 c5 32.Be1-+) 31.Kh2 (31.Rd1 Rc7=) 31...Na6 (31...Ne4!? 32.Bf8 Kf8 33.Ne6 fe6 34.Qe6 Nd2+-) 32.Bf8= Rf8 (32...Kf8?? 33.Ne6 fe6 34.Qe6+-) 33.Nb3 c5 34.Rf1 (34.Bd3 Bd3 35.Rd3 Rcd8=) 34...Rcd8=+ 35.Qf4 Nb8 36.Bf3 (36.Rd1 Nc6=+) 36...Rd7 (better 36...Bd3 37.Rd1 Qb3-/+) 37.g4? (37.Rd1 Rd1 38.Bd1 Nc6=+) 37...Rfd8 (better 37...Bd3 38.Rd1 Qb3-+) 38.g5 hg5 (38...Bd3 39.Rg1 h5 40.Nc1=+) 39.Qg5= Rf8?? (39...Bd3 40.Rg1 g6+=) 40.Rg1+- f6 (better 40...g6!?+-) 41.ef6+- Qd6 (41...Bf5 42.Be4 Qc7 43.f4 Be4 44.Re4+-) 42.Kh1 (better 42.Rg3 Bf5 43.Bh5 Rc8+-) 42...Rdf7 (42...Bf5+-) 43.Bh5 Qc6 44.Kh2 (better 44.Rg2 Na6 45.fg7+-) 44...Qc7 45.Reg3 Rf6 46.Qg7 Qg7 47.Rg7 Kh8 48.f3 (48.Rb7 Be4 49.Rb5 Rf2 50.Kh3 Na6+-) 48...b6 (48...Rf4!? 49.R1g4 Rg4 50.Rg4 b6+-) 49.Rb7 Rh6 (49...e5 50.Nd2+-) 50.Rg5+- e5 51.Re5 Rd8?? (51...Bg8 52.Re8 Re8 53.Be8+-) 52.Kg3 (better 52.Re8 Re8 53.Be8 Na6+-) 52...Nd7? (better 52...Bg8!?+-) 53.Re8 (53.Rd5 Bg8 54.Rdd7 Rd7 55.Rd7 Rh5+-) 53...Re8 54.Be8 Ne5 55.Bf7 (55.Nd2!? Rd6 56.Re7 Ng6+-) 55...Nf7 56.Rf7 Bg8 57.Rf4 Rd6 58.Nc1 (58.Rf5 Bc4 59.Nc5 bc5 60.Rc5 Bb3+-) 58...Rd1+- 59.Ne2 Ra1 60.Re4 Ra3 61.Nf4 Kg7 62.Nh5 Kf7 63.Rf4 Ke7 64.Nf6 (64.Rg4 Ra1 65.Re4 (worse 65.Rg8 Rg1 66.Kf4 Rg8=) 65...Kd6 66.Nf6+-) 64...Bc4= 65.h5 Be6 66.h6 Ra8 67.Kh4 (67.Ne4=) 67...Rh8 (better 67...c4!? 68.Ne4 b5=+) 68.Kg5+= c4 69.Re4 Kf7 70.Re1 c3 (70...Rc8 71.Ne4 Rg8 72.Kf4+-) 71.Rc1+- Rc8 (71...Rh6 72.Kh6 Kf6 73.Rc3 Kf5=) 72.Ne4+- Rg8 73.Kh4 (73.Kh5 Rg2 74.Rc3 Bf5+-) 73...Rg2 (73...Kg6!? 74.Ng5 Bf5+-) 74.Ng5 Kf6 75.Ne6 (75.Rc3 Rh2 76.Kg3 Rh6 77.Ne6 Rg6 78.Kf4 Ke6 79.Rc6 Kf7 80.Rc7 Ke6=) 75...Rh2? (75...Ke6 76.Rc3 Rb2 77.Kg5 Rg2 78.Kf4+-) 76.Kg4 (better 76.Kg3 Rh6 77.Nc7+-) 76...Ke6 77.Rc3 Kd5 78.Kg5 Rg2 79.Kf5 b5 1–0. Franck,Alfons – Boudelet,Georges, Belgian championship, 1955.

5.h3 Bb4?? (better is 5...Ngf6 6.a3 Bg6=) 6.Bg7+- Qf6 (6...Ngf6 7.Bh8 c6 8.Nh4+-) 7.Bf6 Ngf6 8.c3 Bd6 9.d3 0-0-0 10.Nbd2 Nb6 11.Nd4 Bg6 12.a4 (12.Nb5!? Kb8+-) 12...a6 13.a5 Nbd7 14.Qb3 (14.Rb1 e5 15.N4f3 e4+-) 14...Nc5 15.Qb2 (better is 15.Qc2!? e5 16.N4b3 Nfd7+-) 15...Bd3 16.N2b3 Nfd7 17.Kd2 (17.Nc5 Nc5 18.0-0-0 Bg6+-) 17...Bf1 (17...Ne5 18.Ke1 Nc4 19.Qa2 Bf1 20.Rf1+-) 18.Rhf1 Ne4 19.Kd3 (better is 19.Ke1!? Ne5 20.Qc2 Rhg8+-) 19...c5 20.f3 (better is 20.Ke2 cd4 21.cd4+-) 20...Ng3 21.Rfb1 c4? (better is 21...Ne5!? 22.Kc2 Nc4+-) 22.Kc2 e5 (22...cb3 23.Qb3 Nc5+-) 23.Nd2 Nc5 Black prepares e4 24.Qb6 Rd7 (24...Kd7 25.Kd1+-) 25.Qa7 (better is 25.Nc6!? Rc7 26.Nb4 Nd7+-) 25...Rhd8 (25...ed4 26.Qa8 Bb8 27.ed4+- (27.cd4?! Ne6+-)) 26.f4! e4 (26...ef4 27.ef4 Combination) 27.Rb2 Rc7 28.Rab1 (28.Rb6 Kd7+-) 28...h5 (28...Nb3 29.N2b3 cb3 30.Nb3+- (30.Kb3?! Bc5 31.Qa8 Kd7 32.Qd8 Kd8+-)) 29.f5 (29.Rb6!? Kd7 30.Rb7 Nb7 31.Rb7 h4+-) 29...h4 30.Rb6 Bf8 (30...Be5 31.Nf1 Nf1 32.Rf1 Bd4 33.cd4+-) 31.R1b2 Be7 (31...Re8 32.Kb1+-) 32.Nb1 (32.Nc6 Kd7 33.Rb7 Nb7 34.Rb7 Bd6 35.Rc7 Bc7 36.Ne5 Kd6 37.Nf7 Ke7 38.Qc7 Rd7 39.f6 Kf7 40.Qd7 Kf6 41.Qd5 Kg6 42.Ne4 Ne4 43.Qe4 Kf7 44.Qc4 Ke8 45.Qa6 Ke7 46.Qa7 Kf6 47.Qd4 Kg6 48.a6 Kf7 49.Qd6 Kg7 50.a7 Kh7 51.Qe7 Kg6 52.Qe6 Kg7 53.a8Q Kh7 54.Qag8) 32...Nf1 33.Rh6 (better is 33.Nc6! Bf6 34.Nd8 Bd8 35.Rd6+-) 33...Ne3 34.Kd2 Ng2 (34...Bg5 35.Rh5 Nf1 36.Kd1+-) 35.f6 Bd6 36.Nf5 (36.Rh7 Nd3 37.Rb6 e3 38.Kc2 Nge1 39.Kd1 e2 40.Ke2 Bc5 41.Qa8 Kd7 42.Rf7 Ke8 43.Qd8 Kd8 44.Ne6 Ke8 45.Rc7 Nf4 46.Nf4 Be7 47.Re7 Kd8 48.Ne6 Kc8 49.Re8 Kd7 50.Rd8) 36...Bf4 37.Ke2 (37.Kd1 Ne3 38.Ne3 Bh6 39.Nf5+/–) 37...Bh6+= 38.Nh6 Nf4 39.Ke3 Nfd3? (39...b5!? 40.Qb6 Nfd3+/–) 40.Rg2 (40.Rb6!? Rcd7+-) 40...Rcd7 41.Nf5 Kc7 42.Na3 (42.Nh4?! Rd6 43.Nf5 Rf6+=) 42...Na4 43.Kd2 (43.Qd4 Kb8+-) 43...Rh8 (43...d4!? 44.Nd4 Ne5+/–) 44.Nc2+- Rh5?? (44...Ndc5 45.Nb4+-) 45.Ne7 (45.Rg8 Rd6 46.Qb8 Kc6 47.Ncd4 Kc5 48.Qd6) 45...Rh6?? (45...Re5+-) 46.Rg8 Kd6 47.Nd5! Kd5 (47...Ndc5 48.Ncb4 Ne6+-) 48.Qd4 Ke6 (48...Kc6 49.Rc8 Rc7 50.Qe4 Kb5 51.Qd5 Nac5 52.Rc7 Rf6 53.Rc5 Nc5 54.Na3 Ka4 55.Qc5 Kb3 56.Nc2 Rf2 57.Qf2 Kb2 58.Qb6 Ka2 59.Kc1 f5 60.Qb2) 49.Re8 Kf5 (49...Re7 50.Re7 Kf5 51.Qd5 Kg6 52.Qf7 Kg5 53.Qd5 Kf4 54.Re4 Kg3 55.Rg4 Kh3 56.Qg2) 50.Qd7 (50.Ne3 Kg5 51.Qd7 Kf6 52.Qe7 Kg7 53.Qg5 Rg6 54.Nf5 Kh7 55.Qh4 Rh6 56.Qh6) 50...Kf6+- 51.Qa4 (51.Qd8 Kf5 52.Ne3 Kf4 53.Qd5 Nf2 54.Qf7 Kg3 55.Qg7 Rg6 56.Qg6 Kf4 57.Rf8 Ke5 58.Qf6) 51...Rg6 (51...Kg5 52.Qc4 f5 53.Nd4+-) 52.Re4 (52.Re4 Ne5 53.Ne3 Nf3 54.Kd1 Rg1 55.Ke2+-) 1–0. pittol – robinsoncastro, gameknot.com, 2014.

6.Bc4 Bb4?? 7.Bg7+- Nb6 8.Bb3 (8.Bh8 Nf6+-) 8...Nf6 9.Bh8 Bd3 (9...Qe7 10.a3 Bd6 11.Nc3+-) 10.Ne5 Ba6 (10...Bf5 11.a3 Bd6 12.d4+-) 11.Qc2 (11.Qf3 Nbd7 12.Nd7 Nd7+-) 11...Qe7 12.Nc4 (12.f4!? Nfd5 13.Qh7 Ne3+-) 12...Bc4 13.Bc4 0-0-0 14.0-0 (better is 14.a3 Bc5 15.Bf6 Qf6 16.Ra2+-) 14...Rh8 15.d4 (15.Be2 Rg8+-) 15...Nbd5 (15...Nc4 16.Qc4 Rg8 17.Nc3+-) 16.e4 (16.a3 Ba5+-) 16...Nf4 17.Nd2 (17.e5 N6d5+-) 17...Bd2 (17...Rg8 18.g3+-) 18.Qd2 Ng6 (18...e5 19.g3 Ne4 20.Qc2 ed4 21.gf4+-) 19.e5 Ne4 (19...Nd7 20.Rab1 Nb6 21.Rfc1+-) 20.Qe3 Ng5 (20...Qb4 21.Be6! fe6 22.Qe4 c6+-) 21.f4 Nf4 (21...Nh4 22.fg5 Nf5 23.Qf2 Qg5 24.Bd3+-) 22.Qf4 (better is 22.Rf4 h5+-) 22...h5 (22...Rg8 23.Kh1 h5 24.Rab1+-) 23.h4 Nh7 24.Be2 (better is 24.Qf7!? Qh4 25.Be6 Kb8 26.Qh7 Qd4 (26...Rh7?? 27.Rf8 Qd8 28.Rd8) 27.Kh1 Qe5+- (27...Rh7 28.Rf8 Qd8 29.Rd8)) 24...Nf8 (24...Rf8 25.Rab1 c6 26.Qh6+-) 25.Qf6 Qf6 26.Rf6 Ng6 27.g3 (27.Rf7 Nh4 28.Rc1 c6+-) 27...Rg8 (27...Ne7 28.Rf7 Nf5 29.Rd1+-) 28.Kh2 (better is 28.Bh5 Nh4 29.Kf2 Ng6 30.Rf7 Nf8+-) 28...Ne7 (28...Rd8 29.Rd1 c5 30.Bh5 cd4 31.Bg6 fg6 32.Rg6+-) 29.Rf7 (29.Bh5 Nd5 30.Rf7 a6+-) 29...Nd5 (29...Nc6 30.Bh5 Rd8 31.Bg4 Nd4 32.h5+-) 30.Raf1 (30.Bh5 Rh8 31.Bf3 a6+-) 30...Nc3 (30...Rh8 31.Rg7+-) 31.Rf8 Rf8 32.Rf8 Kd7 33.Bh5 1–0. mtr – Roldsez, internet live, 2001.

6.Bc4 Nb6 7.Bb5 c6 8.Be2 =.

6.Bc4 Nb6 7.Be2 Nf6 (7...Bb4?? 8.Bg7 Nf6 9.Bh8+-) 8.Qb3 Qd5 9.Qd5 Nbd5 10.a3 Be7 11.d3 Bg4 12.Nbd2 0-0 13.Nb3 Nd7 14.Rc1 c6 15.h3 Bh5 16.g4 Bg6 17.h4 f6 18.Nfd4 Bf7 19.Bf3 Rfe8 20.Ne2 e5 21.Na5 Rab8 22.Ng3 c5 23.b5 Bd8 24.Nc4 Nc7 (24...Be6!?+=) 25.Nd6+/– Re6 26.Ngf5 b6 (26...Nb5!? 27.Nf7 Kf7+/–) 27.Bd1+- c4 28.Rc4 Rd6 29.Nd6 Bc4 30.dc4 Nc5 31.Ke2 g6 32.Bc2 a5 33.h5 Be7 34.Ne4 Ne4 35.Be4 Kg7 36.hg6 hg6 37.g5! Ne6 38.gf6 Bf6 39.Rg1 g5 40.Bd5 Kf7 41.Rg4 Ke7 42.Re4 Nc5 43.Be5 Ne4 44.Bb8 Nc3 45.Kd3 Na4 46.Kc2 Kd7 47.f4 g4 48.e4 Nc3 49.f5 Nd5 50.cd5 Bh4 51.Kd2 g3 52.Ke2 g2 53.Bh2 Be7 54.Kf2 Ba3 55.e5 Bb2 56.d6 a4 57.Bf4 Bd4 58.Kg2 a3 59.e6 1–0. Vasut,Karel (2150) – Gubas,Jan (2090), CZE–chT2D, 2009.

6.Bc4 Ngf6 7.a3 a5 =.

6.Bc4 Ngf6 7.Qb3 =+.

6.Bc4 Ngf6 7.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.b5 Nbd7 7.Nf3).

6.a3 Ngf6 =.

6.cd5 cd5 7.Bb5 a6 (7...Bb4?? 8.Bg7 Ngf6 9.Bh8+-) 8.Be2 Ngf6 (8...Bb4?? 9.Bg7 Rc8 10.Bh8+-) 9.b5 (9.a3 Rc8=) 9...ab5 10.Nd4 Bb1 11.Qb1 b4 12.0-0 Bc5 13.Nb5 0-0 14.d4 Be7 15.Rc1 Rc8 16.Qd3 Rc6 17.a3 Qb6 18.ab4 Bb4 19.Qb3 Be7 20.f3 Rfc8 21.Bc3 Ne8 22.Rcb1 Qd8 23.Ba5 b6 24.Bd2 Rc2 (24...Ra8!?=+) 25.Rd1+= Nd6 26.Bd3 R2c6 (26...R2c4 27.Bb4 Nb5 28.Be7 Nd4 29.Qc4 dc4 30.Bd8 cd3 31.Rd3 Rd8 32.Rd4+=) 27.Na7+/- Nc4 28.Nc6 Rc6 29.Be1 Ne3? (better 29...Bd6+/-) 30.Bb5+- Nd1 (30...Rc5 31.dc5 Bc5 32.Bd7 Nd1 33.Kh1+-) 31.Bc6 1-0. onur604 (2320) - seber (2275), Casual Rapid game, lichess.org, 2021.

6.cd5 ed5 7.Be2 Ngf6 = (7...Bb4 8.Bg7 Bd2 9.Nbd2+-).

6.Be2 Bb4?? 7.Bg7 dc4 8.Bc4 +-.

6.Be2 Bb4?? 7.Bg7 Bd2 8.Nbd2 +-.

6.Be2 Ngf6 7.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Be2).

6.Be2 Ngf6 7.b5 Bd6 (7...dc4 8.bc6 bc6 9.Bc4=+) 8.Nd4= Bb1 (8...Ne5 9.c5 Bb1 10.Rb1 Bc5 11.Ne6 fe6 12.Be5+=) 9.Qb1 (9.Rb1 c5 10.Nf3 dc4=) 9...c5 10.Nf3 Qc7 (10...dc4 11.Bc4 Nb6 12.Bd3=) 11.cd5= Nd5? (11...ed5 12.0-0=) 12.0-0?? (better is 12.Bg7 Rg8 13.Qh7+-) 12...N5f6 (12...Ne5 13.Ne5 Be5 14.f4 Bb2 15.Qb2=) 13.Rc1+= b6 (13...Ne5 14.Be5 Be5 15.d4+= (< 15.Ne5 Qe5 16.Qc2 Rd8=)) 14.d4 0-0 15.dc5 Bc5 (15...bc5 16.Qd3+=) 16.Ng5 (16.Nd4 Rfd8+/–) 16...Ne5 (16...Rfd8 17.Bd3 h6 18.Ne4+/–) 17.Bd4 (17.Ne4 Nfd7+/–) 17...Ned7 (17...Qd6 18.Ne4 Ne4 19.Qe4 Bd4 20.ed4+=) 18.Ne4 (18.Bd3 h6 19.Ne4 Rfd8+/–) 18...Ne4 (18...e5 19.Nf6 Nf6 20.Bb2+=) 19.Qe4 e5 (19...Qd6 20.Bd3 g6 21.Rc4+/–) 20.Bb2 (20.Bd3 f5 21.Qd5 Kh8+=) 20...f5 (20...Rad8 21.Bd3 Nf6 22.Qf5+=) 21.Qd5 Kh8 22.Rd1 Nf6 23.Qe5+- Bd6?? 24.Qd6 1–0. Kreuzer,Martin – Gehrig, Mannheim GER, 1994.

6.Be2 Ngf6 7.c5 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 b6 =.

6.Be2 Ngf6 7.c5 b6 8.Nd4 bc5 9.Nc6 Qc7 =+.

5.a3 Nc6 6.c4 dc4 7.Bc4 a6 8.d4 b5 9.Bd3 Bd3 10.Qd3 e5 (10...Qd7 11.0-0+=) 11.Nbd2 ed4 12.Nd4 Nd4 13.Qd4 (13.Bd4!? Qd5 14.0-0+=) 13...Qd4= 14.Bd4 Bd6 (14...a5 15.ba5 Ra5 16.Bb2=) 15.0-0 Ne7 16.Nf3 0-0 17.Rac1 Rac8 18.Rfd1 Nf5 19.Bc5 Bc5 20.Rc5 Nd6 21.Nd4 Nc4 22.Rc6 Na3 23.Ra6 Nc4 24.Nb5 c6 25.Na3 Ne5 26.h3 Rfd8 27.Rd8 Rd8 28.f4 Nd3 29.Rc6 Nb4 30.Rc3 Ra8 31.Nb5 Nd5 32.Rd3 Ne7 33.Nc7 Rc8 34.Nd5 Nf5 35.g4+- Rc1 36.Kf2 Nd6 37.Ne7 Kf8 38.Rd6 Ke7 39.Rd3 Rc2 40.Kf3 Ke6 41.e4 g6 42.h4 Rh2 43.Kg3 Rh1 44.Rd2 Rg1 45.Rg2 Re1 46.Kf3 Rf1 47.Rf2 Rh1 48.Kg3 Rg1 49.Rg2 Rf1 50.f5 gf5 51.ef5 Ke5 52.Rf2?? Rh1?? 53.Re2+- Kd6?! 54.Re6 Kd7 55.Rf6 Rg1 56.Kf4 Rf1 57.Kg5 Re1 58.Re6! Re6 59.fe6 Ke6 60.Kh6 Kf6 61.Kh7 Ke5 62.g5 Kf4 63.g6 Kg4 64.g7 Kh4 65.g8Q Kh3 66.Kh6 Kh2 67.Kh5 Kh1 68.Kh4 Kh2 69.Qg3 Kh1 70.Qa3 Kh2 71.Qb2 Kg1 72.Kg3 Kf1 73.Qf2 1–0. Fournier,Frederic (1950) – Erickf (1610), Active (5/0), 2005.

5.a3 Bd6 6.c4 c6 7.d3 Ne7 8.Nd4 Be5 9.Nf5 Bb2 (9...Nf5!? 10.d4 Bc7+=) 10.Ng7+/– Kf7 11.Ra2 Be5 12.Nh5 Nd7 (12...d4 13.g3+/–) 13.d4+- Bc7 14.Nc3 Qg8 15.g4 Rf8 16.h4 Ke8 17.cd5 cd5 18.Bd3 f5 19.g5 h6 20.f4 hg5 21.hg5 Rh7 22.Qa4 a6 23.Nf6 Kf7?? (23...Rf6 24.Rh7 Qh7 25.gf6 Qh4 26.Kd1 Qf6+-) 24.Rh7 (24.Nd7?! Rh1 25.Kd2 Ra8=). Janek – Paul, internet, 2016.

5.a3 Bd6 6.Nd4 Ne7? (better 6...Nh6=) 7.g4+- (7.Nf5?! Nf5 8.Bd3 c6=) 7...Be4 8.f3 e5 9.Ne6 (9.fe4?! ed4 10.ed4 de4+=) 9...Qd7 10.Ng7 (10.fe4?! Qe6 11.ed5 Qd5= (worse 11...Nd5 12.c4+/-)) 10...Kf7 11.fe4 Kg7 12.ed5 Nd5 13.Bg2 c6 14.Rf1 Rg8 (14...a5 15.b5!+-) 15.Nc3 Nc3 16.Bc3 Kf7 17.Qf3 Qe6 18.h3 Ke7 19.d3 Nd7 20.Rf2 Raf8 21.Bb2 (21.Qe4 h5 22.Qh7 Qf7 23.Qh5 Qh5 24.gh5 Rg5+-) 21...Rg5 (21...e4 22.Qe4 Bg3 23.Qe6 Ke6 24.Be4+/-) 22.Qe4 (22.e4 Bc7+-) 22...Rf7 23.Ke2 (23.Rf5 Rfg7+-) 23...Rfg7+/- 24.Kd2 a6 25.Bc3 (25.Raf1 h5 26.Bf3 a5+/-) 25...Qg8 (25...h5 26.Bf3+/-) 26.Ke2 (26.Bf3 h5+/-) 26...h5 27.Bf3 hg4 28.Bg4 Qh7 (28...Nb6 29.Qf3 Nd5 30.Bd2+-) 29.Qh7+- Rh7 30.Raf1 Rf7 (30...c5 31.e4+-) 31.Bd7 Kd7 32.Rf6 Rf6 33.Rf6 Ke7 34.Rf3 Rg2 35.Rf2 Rg3 36.Rh2 Kf6 (36...Rg5 37.e4+-) 37.h4 Kg6 38.h5 Kh6 39.e4 Kh7 40.Kf2 (40.Rf2 Rg5+-) 40...Rg8 41.Rh1 Rf8 42.Ke2 Rg8 (42...b6 43.Rg1 Rf6 44.Rg5+-) 43.Kf3 (43.Rf1 Rg2 44.Kd1 Rg5+-) 43...b6 44.Rh3 c5 45.bc5 bc5 46.Rh2 Rg5 47.a4 Be7 48.Rh1 Bf6 49.Bd2 Rg8 50.Be3 Be7 (50...c4 51.dc4 Bg5 52.Bg5 Rg5 53.h6+-) 51.Rb1 Rf8 (51...Bg5 52.Bc5 Bf4 53.Rb6+-) 52.Kg4 Rg8 53.Kf5 Rg2 (53...Rg3 54.Rb7 Re3 55.Re7 Kh6 56.Re5 c4+-) 54.Rb7 Rg7 55.h6 Rf7 56.Ke6 (56.Ke6 Kg6 57.Re7 Re7 58.Ke7+-) 1-0. alrishane (2065) - neso (1680), Rated Classical game, lichess.org, 2013.

5.a3 e5 =.

5.b5 b6 6.Be2 (better 6.Nd4 Nh6 7.Nf5 Nf5 8.Bd3+=) 6...g5 (better 6...e5=) 7.Nd4 g4? (better 7...Qd7+-) 8.Bg4+- (8.Nf5?! ef5 9.h3 Qd7+-) 8...Bg4 (8...Qd7 9.Nf5 ef5 10.Bh5 Kd8 11.Nc3+-) 9.Qg4 f5 (9...Qd7 10.Ne6 Kf7 11.Ng5 Kg6 12.Qd7 Nd7+-) 10.Qh5 (worse 10.Ne6 fg4 11.Nd8 Kd8 12.Bh8 Nd7+-) 10...Ke7 (10...Kd7 11.Nc6 Nc6 12.bc6 Kc6 13.Bh8 Bd6+-) 11.Qh4 Nf6 12.0-0 (12.Nc6 Nc6 13.Bf6 Kf7 14.Bd8 Nd8+-) 12...Rg8 (12...Kf7 13.Nf3 Bg7 14.Ng5 Ke7 15.Ba3 Kd7+-) 13.Nc6 Nc6 14.Bf6 (14.bc6?! Bg7+-) 14...Kd6 15.Bd8 Rd8 (15...Nd8 16.Qh7 Rg7 17.Qh5+-) 16.bc6 Kc6 (16...Bg7 17.d4 Kc6+-) 17.Qd8 1–0. DEFFM – GuestPCFJ, freechess.org, 2018.

5.b5 c5 6.c4 Nf6 7.cd5 White begins to deal mighty blows 7...Qd5 8.Nc3 Qd7 (8...Qd8 9.Rc1=) 9.Bc4 Ne4 (9...Bd6!?=) 10.Ne4+= Be4 11.Ne5 Qc7 (11...Qe7 12.Qg4 Bf5 13.Qf3+-) 12.Qa4+- b6? (better 12...Ke7 13.Be2 Bh7+- (13...Bg2? 14.Rg1+-)) 13.Be6!!+- fe6 (13...Bg2 14.Bf7 Kd8+-) 14.Qe4 Bd6 (14...a6 15.Ng6 ab5 16.Qe6 Be7 17.Nh8+- (17.Qe7?! Qe7 18.Ne7 Ke7+-)) 15.Ng6 (15.Ng6 Rf8 16.Nf8 Kf8 17.Qa8+-) 1–0. DEFFM – unclegogo, freechess.org, 2020.

5.b5 Bc5 6.Nh4 Ne7 7.d4 Bb6 8.Nf5 Nf5 9.c4+-.

5.b5 Bc5 6.Nh4 Ne7 7.Nf5 Nf5 8.Qh5 (8.c4 c6+=) 8...g6= 9.Qh3 Nd7 10.d4 Bb4 (10...Be7 11.Bd3 0-0 12.Nd2+=) 11.c3+= Bd6 12.Bd3 (12.Nd2 0-0+=) 12...Nb6 (12...c5 13.0-0=) 13.e4 (13.a4 c5+=) 13...Ng7 (13...de4!? 14.Be4 0-0=) 14.ed5+= Nd5 (14...0-0!? 15.de6 f5+=) 15.Bg6+- Ke7 (15...hg6 16.Qh8 Pinning (16.Qh8 Deflection)) 16.Be4 Qd7 (16...f5!? 17.Bc2 a6+-) 17.c4+- Bb4 18.Kf1 Nf4?? (18...f5 19.Bc2 Nf6+-) 19.Qb3 a5 (19...Bd6 20.c5 Nf5 21.g3+-) 20.ba6 Ra6 21.Qb4 Kf7 22.Nd2 (22.Bb7?! Rb6 23.Qd2 Rb7 24.Qf4 Rb2+=) 22...Rb6 (22...e5 23.g3 Rb6 24.Qa3+-) 23.Qc3 Ra8 (23...Rd8 24.g3 f5 25.Nf3+-) 24.g3 Ng6 25.d5 e5 26.Kg2 Qg4 (26...Nh5 27.Rhd1 Rg8 28.c5 Ngf4 29.Kf1+-) 27.Rhe1 Nf4 (27...Nf5 28.c5 Rba6 29.d6 cd6 30.Bb7 Nf4 31.Kh1+-) 28.Kf1 Qh3 29.Kg1 Nfh5 (29...Qg4 30.c5 Rb5 31.a4+-) 30.c5 Rba6 (30...Rb5 31.a4 Rba5 32.Nc4 Ra4 33.Ra4 Ra4 34.Qb3 Rc4 35.Qc4+-) 31.d6 Ra2 (31...cd6 32.Bb7 Ra4 33.Ba8 Ra8 34.cd6 Rd8+-) 32.Qc4 Qe6 33.Bd5 Ra1 34.Ra1 Ra1 35.Ba1 Nf5 36.Be6 Ke8 (36...Kg7 37.d7 Nhg3 38.d8Q Nd4 39.Qe7 Kg6 40.Bf5 Ngf5 41.Qg8 Kh5 42.Qeh7 Nh6 43.Qgg6 Kh4 44.Qhh6) 1–0. DEFFM – GuestT, freechess.org, 2019.

5.b5 Bc5 6.Nh4 Bg6 7.Be2 (7.c4 Ne7+-) 7...c6 (7...Bf7 8.c4+=) 8.a4 (8.d4 Bd6 9.c4 Ne7+-) 8...Ne7+= 9.0-0 Bf7 (9...Nd7 10.c4+=) 10.d4 Bb6 11.c4 Bc7 12.cd5 (12.Nd2 0-0+-) 12...Nd5 (12...cd5 13.Nc3+=) 13.Ba3+- b6? (better 13...Bd6+-) 14.bc6+- Nc6? (14...g5 15.Nf3 g4+- (15...Nc6?? 16.Bb5 Nde7 17.Be7 Ke7 18.Bc6+-)) 15.Bb5 Qd6 (15...Nde7 16.Qf3 Rc8 17.Bc6 Nc6 18.Qc6 Qd7+-) 16.Bd6 Bd6 17.Bc6 (17.Bc6 Ke7 18.Bd5 ed5 19.Nf5 Kd7 20.Qb3+-) 1–0. DEFFM – GuestMVKD, freechess.org, 2019.

5.b5 c6 6.c4 (6.Nh4 Nh6=) 6...dc4 (6...Bd6 7.bc6 Nc6 8.Nh4=) 7.Bc4 Ne7 8.Qb3 Nd5 (8...Nd7 9.Nd4 Nc5 10.Qa3=) 9.d3 (better is 9.Nd4!?+/–) 9...Nd7= 10.e4 (better is 10.Nd4=) 10...Bb4 (better is 10...Nc5!? 11.Qd1 Nb6 12.ef5 Nc4 13.dc4 Nd3 14.Kf1 Nb2=) 11.Nbd2 Bd2 12.Nd2 Nc5? 13.Qa3+- Nf4 14.Qc5 Ng2 15.Kd1 Bg4 (16.f3 a6 17.fg4 ab5 18.Be6 Qd3 19.Qh5 g6+-; 15...Bg6 16.bc6 b6 17.Qd4+-). ludger – alwayslosing (1835), net–chess.com, 2005.

5.b5 Bd6 6.Be2 Nh6 7.0-0 Nd7 (7...a6 8.Ba3=) 8.a4 (8.Nd4 Qe7=) 8...Nc5 (8...0-0 9.Nc3=) 9.d4+= Ne4 10.Nbd2 Nd2 11.Qd2 Bg4 12.Ba3 Ba3 13.Ra3 Qd6 14.Raa1 0-0-0 (14...e5 15.a5=) 15.c4 dc4 16.Rfc1 e5 17.Rc4 e4 18.Ne1 Be2 19.Qe2 f5 20.Rac1 Rd7 21.f4 (21.h3 Kd8+/–) 21...ef3 (21...g5 22.fg5 Ng4 23.g3+=) 22.Nf3+/– Ng4 23.Ne5 (23.h3 Nf6+/–) 23...Re8?? (better is 23...Ne5 24.de5 Qe5=+) 24.Nd7?? (better is 24.Ng4 fg4 25.Qg4+/–) 24…Qh2 (25.Kf1 Qh1#) 0–1. tanto – laxstar (1605), net–chess.com, 2002.

5.b5 Nd7 6.a4 e5 7.Nh4 (7.Nc3 c6=) 7...Be6 8.Qh5 (8.Be2 Bd6=) 8...Bf7 9.Qg4 (9.Qd1 Nh6=+) 9...Ne7 10.Bd3 (10.Ba3 g5 11.Nf5 h5-/+) 10...g6 (10...h5 11.Qh3 g5 12.Nf5-/+) 11.0-0 e4 (11...h5 12.Qh3 g5 13.Nf5=+) 12.Be2 Bg7 (12...g5 13.Nf5 h5 14.Qh3=+) 13.f4 (better 13.Qg3!?=) 13...f5-/+ 14.Bg7 fg4 15.Bh8 Ng8 16.Bg4?? (better 16.g3-/+) 16…Qh4-+ (16...Qh4 17.Bh3 Ngf6-+) 0–1. Abdullaevich (1985) – Lonchochess58 (1985), lichess.org, 2020.

5.b5 Bg4 6.Be2+- Qd6 (6...Ne7+-) 7.Kf1 (7.0-0!?+-) 7...Nd7+= 8.c4 (8.Nd4 Be2 9.Qe2 e5=) 8...dc4 (8...Ne7 9.Nc3=) 9.Bc4 (9.Na3 Nb6 10.Qc2 Rd8 11.Nc4 Nc4 12.Bc4 Bf3 13.gf3 Ne7+=) 9...0-0-0 10.h3 Bf3 11.gf3 g5 (11...Kb8!?=) 12.Qb3+= Re8 13.d4 (13.Nc3 f5+-) 13...Nb6 14.Ba3 Qd7 15.Be6 Re6 16.Bf8 Ne7 17.Be7 Re7 18.Nc3 h5 19.a4 Kd8? (better 19...Rd8!?+-) 20.a5+- Nc8 21.a6 (21.Kg2 Ree8 22.a6 ba6 23.Ra6 g4+-) 21...b6 22.Nd5 (22.Kg2 Rg7+-) 22...Re6 (22...Qe6 23.Rb1 Rg7 24.Kg2+-) 23.Rc1 c6 24.Nb4 cb5 (24...Ne7 25.bc6 Nc6 26.d5+-) 25.d5 Rd6 26.Nc6 Ke8 27.e4 Ne7 (27...Kf7 28.Nd4 Qe8 29.Ne6+-) 28.Nd4 Kf7 (28...b4+-) 29.Nb5 Nd5 (29...Kg6+-) 30.Rc7 Qc7 31.Nc7 Rc8 (31...Rhd8 32.ed5 h4 33.Kg2+-) 32.Nd5 Rc1 33.Kg2 Rh1 34.Ne3 Kg6 35.Kh1 (35.Kh1 Rd8 36.e5+-; 35.Qg8 Kh6 36.Nf5) 1–0. GuestMPBP – GuestRKCM, freechess.org, 2019.

5.c4 c6 6.cd5 ed5 7.Qb3 Nd7 (7...Bd6 8.Be2=) 8.Be2 (8.Nd4 Ne7=) 8...Bd6 9.0-0 Ne7 10.Nc3 0-0 (10...Qb6 11.Ba3=) 11.Nd4 Qc7? (11...Nb6!?=) 12.g4 (12.Nf5 Nf5 13.Nd5 Bh2 14.Kh1 cd5 15.Qd5 Kh8 16.Rfc1 Ne3 17.Rc7 Nd5 18.Rd7+-) 12...Bh2 (12...Bg6 13.Ne6 Qb8 (13...Bh2? 14.Kg2 Qd6 15.Nf8 Kf8 16.d4+-) 14.Nf8 Kf8+/-) 13.Kh1 Bg6 14.Ne6 (14.f4!? Bg3 15.Kg2 Rfe8+-) 14...Qd6+/- 15.Nf8 Rf8? (better 15...Kf8!? 16.f4 d4 17.Kh2 dc3 18.Bc3 Nd5+/-) 16.f4+- Bf7 (16...Bg3 17.Kg2 Bf4 18.Rf4+-) 17.Kh2 d4 (17...f5 18.Qc2 d4+-) 18.Bc4 (better 18.Ne4 Qc7 19.Qa3 de3 20.de3+-) 18...dc3+/- 19.Bf7 Rf7 20.Bc3 g5 (20...Nd5 21.Rae1+/-) 21.Kg2 Nd5 22.f5 (22.fg5 Qe6 23.Rf5 Rg7+-) 22...Re7 (22...Nc3 23.Qc3 (worse 23.dc3 Qd2 24.Rf2 Qe3=) 23...Ne5 24.Kh3+/-) 23.Rae1 (23.Qc4 Kg7 24.Qd4 a5=) 23...Kg7 24.a3 (24.Bd4 b6+/-) 24...b5 (24...Nc3 25.Qc3 (worse 25.dc3 Qd2 26.Kh1 Ne5=+) 25...Re4 26.Rh1=) 25.Rf3 (25.Bd4 Re4 26.Kf3 Rd4 27.ed4 Qf4 28.Kg2 Qg4 29.Qg3 Qd4+=) 25...Ne5 (25...Re4!? 26.Rg3 Nc3 27.Qc3 Rc4=) 26.Be5 Qe5 (26...fe5 27.Qc2+/-) 27.Qc2+- h5 (27...Qe4 A) 28.Qc6?! Nf4 29.ef4 A1) 29...Qc6? 30.Re7 Kf8 31.Re6+- (31.Ra7 h5 32.Kg3 gf4 33.Kf4 Qe8 34.gh5 Qb8 35.Ke4 Qa7-+); A2) 29...Qe1+=; B) 28.Qe4 Re4 29.Rg3+-) 28.d4 (28.gh5 Nf4 29.Kf2 Nh5+-) 28...Qd6 (28...Qe4 29.Qe4 Re4 30.gh5 g4+/-) 29.gh5 Nf4 30.Kg1 (30.ef4?! Re1 31.fg5 Qd4 32.gf6 Qf6+-) 30...Nh5 31.Qc5 (31.Qg2 Kf7+-) 31...Qc7 (better 31...Qc5 32.bc5 g4+/-) 32.Rc1?? (32.e4 Nf4+-) 32...Ng3?? (better 32...g4 33.Rf2 Qg3 34.Rg2 Qe3 35.Kh1 Nf4 36.Qe7 Qe7 37.Rg4 Kf7 38.Rf4 Qe3-+) 33.Rc2 (33.Kg2 Ne4 34.Qc6 Qc6 35.Rc6 Rd7+-) 33...Ne4 (33...g4 34.Rf4 Re4 35.Rg2 (35.Qc6?! Qc6 36.Rc6 Ne2 37.Kg2 Nf4 38.ef4 Rf4=) 35...Rf4 36.ef4 (36.Rg3? Rd4 37.Qd4 Qg3 38.Kf1 Qf3 39.Kg1 Qf5-+) 36...Qf4 37.Qe7 Kg8 38.Qe8 Kg7 39.Qg6 Kf8 40.Qf6 Kg8 41.Qe6 Kf8 42.Rf2 Qd4 43.f6 Ne2 44.Qe2+-) 34.Qc6 (34.Qc6 Qc6 35.Rc6+-) 1-0. carlos78 (2235) - Germain (2050), Rated Blitz game, lichess.org, 2015.

5.d4 Bb4=+ 6.c3 Bd6 7.Nbd2 (7.Nh4 Be4=+) 7...Ne7 8.Nh4 Bg6 (8...0-0 9.Nf5 Nf5 10.Bd3=+) 9.Ng6 hg6 10.Qg4 (10.c4 c6=+ (< 10...Bh2 11.Nf3+/–; < 10...Rh2 11.Rh2 Bh2 12.Nf3+/–)) 10...f5 11.Qg5?? (better is 11.Qd1=+) 11...Rh5-+ (11...Rh2 12.Rh2 Bh2 13.g3+/–) 12.Qh5 (12.h4 Nd7-+) 12...gh5 13.Be2 g6 14.h3 (14.0-0 c5-+) 14...Nec6 (14...c5 15.dc5 Bc5 16.0-0-+) 15.g4 (15.0-0 Qf6-+) 15...Qe7 (15...h4 16.Rb1-+) 16.gh5 Nd7 (16...g5!? 17.Nf3-+) 17.hg6 0-0-0 (better is 17...Qg5!? 18.h4 Qg6 19.h5-+) 18.h4 Na5 (18...e5 19.Kd1-+) 19.h5 Qg5 20.Nf3 (20.c4 f4 21.ef4 Bf4-+) 20...Qg2 21.0-0-0 (21.Rg1 Qh3 22.Ng5-+) 21...Qf2 22.h6 Qe3 23.Nd2 Qe2 (23...Ba3 24.Ba3 Qc3 25.Kb1 Qa3 26.Nb3 Nb3 27.Rd3 Nd2 28.Rd2-+) 24.h7 Nb3 (better is 24...Nf6 25.h8Q Rh8 26.Rh8 Kd7-+) 25.ab3 Nb6?? (better is 25...Nf6 26.Rde1 Qd3-+) 26.g7+- e5 (26...Qg4 27.Rdg1 Bg3 28.h8Q+-) 27.h8Q ed4 (27...Be7 28.g8Q Rg8 29.Qg8 Kd7 30.Rh8+-) 28.Qd8!! Kd8 29.g8Q Kd7 (29...Qe8 30.Qg5 Be7 31.Qf5+-) 30.Rh7 (better is 30.Rde1 d3+-) 30...Kc6 31.Qe8 (better is 31.cd4 f4 32.Rh6+-) 31...Kc5 (better is 31...Qe8 32.cd4 Qe3-+) 32.b4 (32.Ba3) 1–0. kamera (1610) – NN, GameColony.com, 2002.

5.Nd4 Bb4+= 6.Nf5 (6.Bb5 c6 7.Nf5 (7.a3 Bd2 8.Qd2 cb5 9.Nf5+=) 7...ef5 8.Bd3 Qd7 9.0-0+=) 6...ef5 7.c3 (7.c4 Nc6= 8.a3 Ba5 9.Qh5=; 7.Bd3 Qd7 8.0-0 Qe6 9.Qf3=; 7.Bb5 c6 8.Bd3 Qb6 9.Bf5=) 7...Bd6 (7...Ba5 8.Qb3 (8.Bd3= Qd7 9.0-0=) 8...b6 9.c4=; 7...Be7 8.Qb3 b6 9.c4+=) 8.Qb3 (8.c4 Ne7 9.Qh5=) 8...Nd7 9.Qd5 (9.Qb7? Rb8 10.Qd5 Ne7-+) 9...Ne7 10.Qc4 (10.Qf3 Ne5 11.Qh5 N5g6+=) 10...Ne5 (10...Nb6 11.Qe6=) 11.Qb3+= N7c6 (11...N5c6!?+=) 12.d4+/– (12.Qb7 Rb8 13.Qa6 Rb2-+) 12...Nf7 (12...Nd7!?+/–) 13.Qb7+- Nd4? (better is 13...Ne7 14.Bb5 Kf8+-) 14.cd4 0-0 15.Bc3 Qe7 (15...f4 16.e4+-) 16.Bc4 f4 17.e4 f3 (17...Rab8 18.Qd5+-) 18.gf3 Kh8 (18...Rfb8 19.Qc6+-) 19.Nd2 Rab8 (19...Ng5 20.Rb1+-) 20.Qa7 Ng5 21.Be2 (21.Bd3 Bb4 22.Bb4 Qb4+-) 21...f5 (21...Ra8 22.Qb7+-) 22.e5 Bb4 (22...Rfe8 23.a4+-) 23.Bb4 Qb4 (23...Rb4 24.Rc1 Qe8 25.Bc4+-) 24.Rb1 Qd2 (24...Ra8 25.Rb4 Ra7+-) 25.Kd2 Ra8 26.Qc7 Ra2 27.Ke1 Ne6 28.Qe7 Ra6 29.Ba6 1–0. marus – omon, internet live, 2001.

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6).

5.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.a3 c5 6.c4 dc4 7.Bc4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.a3 Nbd7 7.Nf3 c5).

5.a3 c5 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3 c5).

5.a3 c6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.a3 c6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

5.a3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.a3 Nbd7 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

5.a3 Be7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Be7).

5.b5 Bd6 6.c4 dc4 7.Bc4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5 Bd6).

5.b5 Bd6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Bd6).

5.b5 Bd6 6.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6).

5.b5 Nbd7 6.c4 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5).

5.b5 Be7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Be7).

5.b5 h6 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6).

5.c4 Bb4 6.Qa4 Nc6 7.Ne5 Rb8 8.Nc6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Bb4 6.Qa4 Nc6 7.Nd4 Rb8 8.Nc6).

5.c4 c6 6.b5 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Bd6).

5.c4 Nbd7 6.a3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.c4 Nbd7 6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.Be2 Nd7 6.0-0 Bf3 7.Bf3 Ngf6 8.b5 Bd6 9.d3 0-0 10.a4 Re8 (10...a6 11.ba6 ba6 12.Nd2=) 11.Nd2 e5 12.c4 (12.h3 Qe7=) 12...c6 (12...e4 13.Be2=) 13.Qc2 Rc8 14.Qb3 e4 15.de4 de4 16.Be2 Qc7 17.g3 Nc5 18.Qc2 Nfd7 (18...Be5 19.Nb3 Bb2 20.Qb2=) 19.Rfd1 (better is 19.Bg4=) 19...Qb8?? (19...Be5 20.bc6 Qc6 21.Nb3+=) 20.Ba3 (20.Bg4!? Qc7 21.Bd4+/–) 20...cb5 (20...Nf6 21.Bc5 Bc5 22.Rab1=) 21.ab5 (21.Bg4 ba4 22.Bd7 Nd7 23.Bd6 Qd6 24.Ne4 Qc7+=) 21...Be5 22.Rac1 f5 23.Nb3 Nb3 24.Qb3 Nf6 25.Bd6 Bd6= 26.Rd6 Kh8 27.Rdd1 Re5 28.Ra1 Rec5 29.Qa3 h5 30.Qa7 Qa7 31.Ra7 R5c7 32.h3 g6 33.Rd6 Kg7 34.Kg2 Kf7? 35.f3 Ne8 36.Rd4 Nf6 37.g4 Re8 38.Kf2 Kf8? 39.Rd6 Kf7 40.Rd4 Twofold repetition 40...Kf8 41.Rd1?? Kf7?? 42.Bf1?? Ree7 43.Re1 Rc8? 44.Rea1 Ne8 45.Rd1 Ke6 46.fe4 fe4 47.Rd4+/– Kf7 48.Bg2+- Nf6? 49.Ke2 Rce8 1–0. Istratescu,Cezar – Stanciu,Alexandru Ovidiu, ROM–ch U10 Sovata, 2002.

5.Be2 Bf3 6.Bf3 c6 7.0-0 f6? (better 7...Nf6!?=) 8.a3 a6 (8...Nd7!?+-) 9.Re1 Bd6 10.d3 (10.e4 d4+-) 10...e5? (10...Ne7!?+-) 11.Nd2 (11.c4 a5 12.b5 dc4 13.dc4 Nh6+-) 11...Ne7 12.c4 0-0 13.cd5 (13.Qb3 Rf7+-) 13...Nd5 (13...cd5 14.Qb3 Kh8 15.Bd5 Nd5 16.Qd5+-) 14.d4 (14.Qb3!? Rf7+-) 14...Nd7+- 15.Nc4 Qc7 (better 15...Bc7!? 16.e4 Nf4+-) 16.Nd6 Qd6 17.de5 Ne5 18.e4 (18.e4 Nf3 19.gf3+- (19.Qf3?! Nc7+=)) 1–0. Darkseid (1895) – uniquenickname, ChessWorld.net, 2018. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6 4.e3 Bg4)

5.Be2 Nf6 6.b5 Bd6 7.0-0 Bf3 8.Bf3 Nbd7 9.c4 Nb6 10.cd5 ed5 (worse is 10...Nbd5 11.e4 Ne4 12.Be4 Bh2 13.Kh2 Qh4 14.Kg1 Qe4 15.Nc3 (worse is 15.Bg7 Rg8 16.Re1 Qg6-/+) 15...Nc3 16.Bc3+/–) 11.Nc3 Nc4 12.Bc1 0-0 13.g3 (worse is 13.Nd5 Nd5 14.Bd5 Bh2 15.Kh2 Qd5+=) 13...c6 14.d3 Ne5 15.Bg2 h5 (15...Qa5 16.Bb2=) 16.f4 Ng6 17.bc6 bc6 18.e4 Bc5 19.Kh1 Bd4 20.Bb2 Ng4 21.Qf3 Qa5 22.Nd1 Bb2 23.Nb2 Qd2 24.Nd1 de4 25.Qe4 Rfe8 26.Qc6 Rad8 27.Qc1 Rd3 28.Qd2 Rd2 29.Nc3 Ne3 30.Rg1 Rc8 31.Ne4 Rb2 32.Rae1 Ng4 33.h3 Nf2 34.Nf2 Rf2 35.Bd5 Rcc2 36.Rg2 Rg2 37.Bg2 h4 38.f5 Nf8 39.g4 Ra2+= 40.Kg1 Nd7 41.Re7 Rd2 42.g5 Nc5 43.Ra7+= g6 44.f6 Ne6 45.Ra5 Nf4 46.Ra8 Kh7-/+ 47.Bf1 Ne6 48.Bc4?? Ng5-+ 49.Rf8 Nh3 50.Kh1 Rd7?? 51.Bf7-/+ Ng5 52.Bg8 Kh6 53.f7?? Kg7 ½–½. Starr,Albert Martin – Liang,Bernard (1795), San Francisco Stamer mem, 2005.

5.Be2 Nf6 6.b5 Qd7 7.Ne5 (7.Nc3 Qd6+=) 7...Be2= 8.Qe2 Qd6 9.0-0 Nbd7 10.f4 Ne4 (10...a6!?=) 11.c4+- Ne5 12.Be5 Qd8 13.Rc1 Bd6 (13...Rc8!?+-) 14.Bg7+- Rg8 15.Bd4 dc4 16.Qf3 Nf6? (better 16...f5+-) 17.Qb7+- Nh5 (17...Be7 18.Qc6 Kf8 19.Rc4+-) 18.Ba7 (18.Qc6!? Ke7+-) 18...Qh4 (18...Be7 19.Nc3 Bf6+-) 19.Qa8 (19.Qa8 Qd8 20.Qd8 Kd8 21.Rc4+-) 1–0. GuestYPGY – GuestLVHW, freechess.org, 2019.

5.h3 Bf3 6.Qf3 Nd7 (6...Bb4?? 7.Bg7 Be7 8.Bh8+-) 7.c4 c6 (7...Bb4?? 8.Bg7 Ne5 9.Qh5+-) 8.cd5 cd5 9.Bb5 a6 (9...Bb4?? 10.Bg7 Rc8 11.0-0+- (< 11.Bh8 Rc1 12.Ke2 Rh1+-)) 10.Ba4 b5 (10...Bb4?? 11.Bg7 Rc8 12.0-0+-) 11.Bb3 Ngf6 (11...Bb4?? 12.Bg7 Ne5 13.Be5+-) 12.Qf4 Be7 13.a4 Nb6 (13...0-0 14.ab5 ab5 15.Ra8 Qa8 16.0-0=+) 14.ab5= ab5 15.Ra8 Qa8 16.Qc7 (16.d3 0-0=) 16...Nc4=+ 17.Bf6 (17.Bc4 bc4 18.0-0 Bb4 19.Bf6 gf6=+) 17...Bf6 (17...Bd6 18.Qd8 Qd8 19.Bd8 Kd8 20.Bc4 bc4 21.b5-/+) 18.0-0 (18.Qc5 Qa6=+) 18...0-0-/+ 19.d4 Rc8 20.Qf4 (20.Qd7 Qb8 21.Bc4 bc4=+ (< 21...dc4 22.Na3+=; < 21...Rc4 22.Na3=)) 20...Be7 21.Bc2 Bb4 22.Bd3 Qb7 23.Qh4 g6 24.Be2 Nd2 (24...Qe7!? 25.Qg4-+) 25.Nd2-/+ Bd2 26.Qf6 b4 27.Rd1 Rc1 (27...b3 28.Bd3 Qc6 29.Qf3-+) 28.Rc1-/+ Bc1 29.Qd8 Kg7 30.g4 (30.Qd6!?-/+) 30...b3-+ 31.g5 (better is 31.Bd3-+) 31...b2?? (better is 31...Ba3 32.Qf6 Kg8-+) 32.Qf6= Kg8 33.Qd8 Kg7 34.Qf6 Kg8 35.Qd8 Kg7 36.Qf6 Kf8 37.Qd8 Kg7 ½–½. marekt – Obliged, GameColony.com, 2002.

5.a3 a6 6.c4 (6.Be2 Nf6=) 6...dc4 7.Bc4 b5 (7...Nc6 8.d4=) 8.Be2 Nf6 9.Nc3 (9.Nd4 Be4 10.Bf3 Bf3 11.Qf3 Qd5=) 9...c5 10.0-0 (10.bc5 Bc5 11.Rc1 Nbd7=) 10...c4 (10...cb4!? 11.ab4 Nc6=) 11.Nd4 Bg6 12.Bf3 (12.f4 Ra7+=) 12...Nd5 (12...Ra7 13.Bc6 Nfd7 14.Be4 Be4 15.Ne4+=) 13.Re1 (13.Bd5 ed5 14.Qf3 Bd3+/–) 13...Be7 (13...Bd6!?+=) 14.Bd5+/– ed5 15.Qf3 Ra7 16.Nd5 0-0 17.Ne7 (17.e4 Rd7+/–) 17...Re7 18.Red1 Qd7+= 19.Rac1 f6 20.Rc3 Re5 21.Rdc1 Rfe8 22.a4?? Be4?? 23.Qg3?? Rg5-+ 24.Qf4 Rg2 25.Kf1 Rg4 26.Qg4 Qg4 0–1. wlittle (2175) – mpenga (2485), net–chess.com, 2004.

5.a3 c5 6.c4 (6.bc5!? Nc6 7.Nd4+/–) 6...Nf6 (6...cb4 7.ab4 dc4 8.Bc4=) 7.Be2 (7.cd5 ed5 8.bc5 Bc5 9.Bb5 Nbd7=) 7...Nbd7 (7...cb4 8.ab4 dc4 9.Bc4 Bb4 10.Nd4 Bb1 11.Rb1=+) 8.0-0 (8.cd5 ed5 9.bc5 Bc5=) 8...cb4 (8...dc4 9.bc5 Bd3 10.Bd3 cd3 11.Qa4=+) 9.ab4 (9.cd5 Nd5 10.d3 Bg4=) 9...Bb4 (9...dc4 10.Bc4 Bb4 11.Qb3=+) 10.d4 (10.cd5 ed5 11.Nc3 0-0=) 10...0-0 (10...dc4 11.Bc4 0-0 12.Ba3 Ba3 13.Na3=+) 11.Nc3 (11.c5 Ne4=+) 11...dc4-/+ 12.Bc4 Rc8 13.Nd2? (13.Qb3!? Bc3 14.Bc3-/+) 13...b5! 14.Bb5 Bc3 15.Bc3 Rc3 16.Ra7 Nb6 (17.Qa1 Rc2-+) 0–1. clochard (2200) – redrook (2585), net–chess.com, 2004.

5.a3 Nd7 6.Bc3 c6 +=.

5.a3 Nd7 6.c4 dc4 7.Bc4 Ngf6 8.d4 Bd6 9.Nbd2 0-0 10.0-0 Rb8 11.Qe2 Re8? (better is 11...Nb6=) 12.e4+- g5? (better is 12...b5 13.Bb3 Bg4+-) 13.ef5 ef5 14.Qd3 (14.Ne5!? Re7+-) 14...Ne4 15.Qb3 Qf6 16.Rfe1 Nd2 17.Nd2 g4 18.Qc2 h5 19.Bd3 Bf4 20.Nc4 Nf8 (20...b5 21.Ne3+-) 21.Bf5 1–0. Rudol,Maria – Koperska,Nina, Ogolnopolska Olimpiada Mlodziezy Poland, 2013.

5.a3 Nd7 6.d4 Ngf6 7.h3 Be7 (7...a5 8.ba5 c5 9.dc5 Ra5 10.Nbd2 Rc5 11.Bf6 Nf6 12.c4=) 8.Nbd2 0-0 (8...a5 9.ba5 Ra5 10.c4=) 9.Ne5 (9.c4 dc4 10.Bc4 a6=) 9...Ne8 (9...a5 10.Nd7 Qd7 11.c3+=) 10.Bd3 (10.c4 Nef6=) 10...Bd3 11.cd3 Bf6 12.0-0 Be7 (12...c6 13.Qe2=) 13.f4 (13.Nb3 Qc8=) 13...Bd6 (13...Nd6 14.Qe2=) 14.Rf3 (14.Nb3 Qc8=) 14...Be5 (14...a5 15.ba5 Ra5 16.Rg3=) 15.de5 c5 (15...c6 16.Nb3=) 16.b5 (better is 16.bc5!? Qc7 17.a4+/–) 16...a6 17.ba6 Ra6 18.Rg3 Kh8 (18...Kh7 19.d4=) 19.Qg4 (19.a4 Qb6 20.Bc3 Qc7=) 19...g6+= 20.h4 (20.Qd1 Ng7+=) 20...Ng7 21.e4 (21.Rh3 Qa5 22.Qd1 Qa4-/+) 21...h5 22.Qh3 Qa5-/+ 23.Nf3?? d4 24.Rg5? Nb6 25.f5 ef5 26.ef5-/+ Nf5?? 27.e6 Na4? 28.e7?? Ne7 29.Bd4 cd4?? 30.Ra5+- Ra5 31.Nd4 Rd5 32.Qe3 Nc6?? 33.Qh6+- Kg8 34.Nf3 Nb2 35.Ng5 Rg5 36.Qg5 Rd8 37.Qb5 Nd3 38.Rd1 Rd6 39.Qb1 Ne7 40.Qb5 Ra6?? 41.Qd3 (41.Qd3 Nf5 42.Qe4+-) 1–0. Maletzki,Heinz – Rauscher,Erwin, Wch Seniors, 2002.

5.a3 Ne7 6.c4 (6.Be2 a6+=) 6...dc4 (6...Nbc6 7.b5 Na5 8.cd5 Qd5 9.Nd4+=) 7.Bc4+= Nbc6 8.0-0 a6 (8...Bd3 9.Bd3 Qd3 10.Qa4+=) 9.Nc3 b5 (better 9...Bd3!? 10.Bd3 Qd3+=) 10.Be2+- Nd5 11.d4 (better 11.Nd5!? ed5 12.Qb3+-) 11...Nc3+- 12.Bc3 Be7 13.Qb3 (13.Nd2 0-0+-) 13...0-0+= 14.Rfd1 Be4 15.Rac1 Bd5 16.Qc2 Bf3?? (better 16...f5+=) 17.Bf3+- (17.gf3?! Bd6+=) 17...Qe8 (17...Na7 18.d5 e5 19.Be5+-) 18.Bb2 Na7 19.Ba8 Qa8 20.Qc7 (better 20.d5!? ed5 21.Qc7 Bh4+-) 20...Bf6 21.Qc2 Rc8 (21...Rd8 22.h3+-) 22.Qe2 Qe4 23.Rc8 (23.Qf3 Qf3 24.gf3 Ra8+-) 23...Nc8 24.Rc1 Nd6 25.f3 (25.Qf3 Qf3 26.gf3 Nc4+-) 25...Qg6 26.e4 Nc4 27.Rd1 Bg5 28.Rd3 Bf4 29.Rc3 (29.d5 Nb2 30.Qb2 ed5 31.Rd5 Qb6 32.Kh1 Qe3+-) 29...Qh5 (29...Qf6 30.Rc4 bc4 31.g3+- (31.Qc4?! Qh4 32.g3 Bg3 33.hg3 Qg3 34.Kf1 Qf3 35.Ke1 Qe4 36.Kd2 Qg2 37.Kc3 Qf3 38.Qd3 Qc6 39.Kd2 h5+=)) 30.g3 Bc7 31.Kg2 Bb6 (31...Qg5 32.Bc1 Qf6 33.Rd3+-) 32.Rc4 bc4 33.Qc4 (33.a4 Qg5 34.h4 Qe7 35.Qc4 h5+-) 33...Qg5 (33...Qb5 34.Qb5 ab5 35.Kf2+-) 34.Bc1 (34.Qc3 h5 35.d5 ed5+-) 34...Qd8 (34...Qb5 35.Qb5 ab5+-) 35.Bb2 h5?? (35...Qg5 36.Qc3 h5+-) 36.Qc3 (36.Qa6 Bd4 37.Bd4 Qd4 38.Qc8 Kh7+-) 36...h4 (36...Qc7 37.a4+-) 37.d5 f6 38.Qc6 (better 38.de6 hg3 39.hg3 Kf8+-) 38...e5 (38...ed5 39.ed5 (39.Qd5?! Qd5 40.ed5 Kf7+-) 39...Kf7 40.gh4+-) 39.gh4 Be3 (39...Qc7 40.a4 Qa7 41.d6+-) 40.Qa6 1–0. Kudojarov,Mars – Tupeev,Salavat, Memorial Dautov, 2008.

5.a3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 h6).

5.a4 Nd7 6.Be2 Ngf6 7.b5 c5 8.c4 b6 (8...Bd6 9.Nc3=+) 9.Nc3= Be7 10.0-0 0-0 11.d4 dc4 12.Bc4 Qc7 13.Rc1 Rfd8 14.Ne2 (14.d5 Bd6=) 14...Ne4 15.Ng3 Ng3 16.hg3 Nf6 (16...Qb7 17.Bd3=) 17.Ne5 Bd6 (17...Be4!?=) 18.Nc6+= Rd7 19.Bd3 Bd3 20.Qd3 Nd5? (better 20...a6+=) 21.e4+- Ne7 22.e5 (22.e5 Nc6 23.bc6 Qc6 24.ed6 Qd6 25.Qf3+-) 1–0. DEFFM – GuestGr, freechess.org, 2019.

5.b5 c5 6.c4 Bd6 7.Bg7+/- Rh7 8.Bb2 Nd7 9.Be2 Ngf6 10.0-0 Qe7 11.Nh4 Bg6 (11...Bb1 12.Rb1 dc4 13.Bc4+/-) 12.Ng6 fg6 13.d4 b6 (13...cd4 14.ed4 dc4 15.Bc4+-) 14.Qc2 Qf7 15.Bd3 Rg7 16.Nd2 0-0-0 (16...g5 17.e4 cd4 18.cd5+-) 17.e4 (better 17.a4+-) 17...Nh5? (better 17...de4 18.Ne4 Ne4 19.Be4 cd4 20.Bd4 Rgg8+-) 18.cd5 ed5 19.ed5 Qd5 20.Be4 Qe6 21.Nc4 (21.d5 Qf7 22.Bg7 Qg7+-) 21...Nhf6 22.Rae1 (22.Bg6?! Bh2 23.Kh1 Bc7+-) 22...Qg4 (22...Re7+-) 23.Nd6 (23.Nd6 Kb8 24.dc5+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.b5 c5 6.c4 Nf6 7.cd5 White begins to deal mighty blows 7...Qd5 8.Nc3 Qd7 (8...Qd8 9.Rc1=) 9.Bc4 Ne4 (9...Bd6!?=) 10.Ne4+= Be4 11.Ne5 Qc7 (11...Qe7 12.Qg4 Bf5 13.Qf3+-) 12.Qa4+- b6? (better 12...Ke7 13.Be2 Bh7+- (13...Bg2? 14.Rg1+-)) 13.Be6!!+- fe6 (13...Bg2 14.Bf7 Kd8+-) 14.Qe4 Bd6 (14...a6 15.Ng6 ab5 16.Qe6 Be7 17.Nh8+- (17.Qe7?! Qe7 18.Ne7 Ke7+-)) 15.Ng6 (15.Ng6 Rf8 16.Nf8 Kf8 17.Qa8+-) 1-0. DEFFM – unclegogo, freechess.org, 2020.

5.b5 c6 6.a4 cb5 7.ab5 (7.Bb5 Nd7+=) 7...Nd7= 8.Be2 Nb6 (8...Ngf6 9.Nd4=) 9.0-0 Nf6 10.Nd4 Bh7 11.Bh5 (better 11.f4+=) 11...Bc5?? (better 11...Nh5 12.Qh5 Bg6=) 12.Ne6+- Nh5?? (better 12...Qe7 13.Nc5 Qc5 14.Bf6 gf6+-) 13.Nd8 (13.Nd8 Rd8 14.Qh5+-) 1–0. guest669 – BattleRocket, chessclub.com, 2019.

5.b5 c6 6.a4 Nf6 7.Nc3=.

5.b5 c6 6.a4 Nf6 7.Nd4 Bh7 8.Be2 c5 9.Nf3 c4 10.d3 cd3 11.cd3 Be7 (11...Bd6 12.0-0=+) 12.0-0 Nbd7 13.d4 (13.Nbd2 0-0=) 13...a6 (13...0-0 14.a5=+) 14.Nc3 Bb4 (14...0-0 15.Qb3=) 15.ba6 (15.Qb3 a5=) 15...ba6= 16.Qb3 a5 (16...Qa5 17.Na2 Be7 18.Bc3+=) 17.Ne5 (17.Rfc1 0-0+=) 17...Ne5= 18.de5 Nd7 19.Nb5 Nc5 (19...0-0!?=) 20.Nd6+= Ke7 (20...Kf8 21.Qd1+=) 21.Qd1+- Rb8 22.Bh5 Ne4? (better 22...Rf8 23.Bd4 Ne4+-) 23.Nf7+- Qf8 (23...Qd7 24.Nh8 Rh8+-) 24.Rc1 (24.Rc1 Rb7 25.Nh8 Qh8 26.Rc6+-) 1–0. DEFFM – GuestDZQJ, freechess.org, 2019.

5.b5 Nd7 6.a4 Ngf6 7.Be2 Be7 (7...Bd6 8.0-0=) 8.0-0 (8.a5 0-0=) 8...0-0 (8...Bg4 9.h3 Bh5 10.a5=) 9.a5 Bd6 (9...Bg4 10.a6 ba6 11.Ra6+=) 10.a6 (10.Nd4 a6+=) 10...ba6= 11.Ra6 Nc5 (11...Nb8!? 12.Ra2 c6=) 12.Ra2+= Bg4 13.Nd4 Be2 14.Qe2 Nfd7 (14...Qd7 15.Nf3+=) 15.Nc6 Qh4 16.f4 g5 (16...a5 17.Rf3 f5 18.Na5+=) 17.c4 gf4 18.ef4 Bf4 19.g3 Bg3 20.Qg2 dc4 21.hg3 Qg5 22.Na3 c3 23.Bc3 f5 24.Nc4 Ne4 25.Bb4 Rfe8 26.d3 Ng3 27.Rf3 f4 28.Be1 Qc5 29.Bf2 1–0. pcmvr (2225) – redrook (2440), net–chess.com, 2006.

5.b5 Nd7 6.d4 Ngf6 7.Bd3 Bd3 8.Qd3 Bd6 (8...a6 9.Ba3=) 9.a4 (9.0-0 Qe7=) 9...0-0 (9...a6 10.Ba3=) 10.Nbd2 c6 (10...c5 11.0-0=) 11.0-0 c5 (11...Rc8 12.c4=) 12.c4 b6 (12...Rc8 13.Rfd1=) 13.Rac1 (13.cd5 ed5 14.dc5 bc5=) 13...Rc8 (13...a6 14.Nb3=) 14.e4 (14.Rfd1 Re8+=) 14...de4= 15.Ne4 Ne4 16.Qe4 Nf6 (16...Qf6 17.Rcd1=) 17.Qh4 (17.Qd3 cd4 18.Bd4 Bf4=) 17...Nh7 (17...Nd7 18.d5 ed5 19.cd5 Qh4 20.Nh4=) 18.d5 (18.Qd8 Rfd8 19.d5 ed5 20.cd5 Be7=) 18...Qh4 19.Nh4 ed5 (19...Rfe8 20.de6 Re6 21.Rce1+=) 20.Nf5+- Bf4 (20...Rfd8 21.Bg7 Bf4 22.Rc3+-) 21.Ne7 (21.Rce1 dc4 22.Ne7 Kh8 23.Nc8 Rc8+-) 21...Kh8 22.Rce1 Rce8 (22...Rcd8 23.cd5 Bg5 24.Ba1+=) 23.cd5 Nf6 (23...Bg5 24.Nc6 Bf6 25.Bf6 Nf6 26.d6+-) 24.Bf6+- gf6 25.g3 Be5 (25...Bd2 26.Re4+-) 26.Nc6+- Bc3?? (better 26...Bd6+-) 27.Re8 Re8 28.d6 (28.Na7?! Rd8+-) 28...Kg7 (28...Rg8 29.d7+- (29.Na7?! Rd8+-)) 29.d7 (29.Na7?! Rd8+=) 29...Ra8 (29...Rg8 30.Rd1+-) 30.d8Q (30.Rd1 f5 31.d8Q Rd8 32.Rd8 c4+-) 30...Rd8 31.Nd8 1–0. DEFFM – GuestFTTW, freechess.org, 2018.

5.b5 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 h6).

5.b5 Nf6 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6).

5.c4 Bb4?? 6.Bg7+- Rh7 7.Bb2 f6? (7...dc4 8.Bc4 Nc6 9.Bb5+=) 8.cd5 (8.Nd4!? Nc6 9.Nf5 ef5 10.a3+-) 8...Qd5+= 9.Qa4 Nc6 10.Bb5 0-0-0? (better 10...a5!? 11.a3 Bf8+-) 11.Bc6+- Bb1?? (better 11...Qc6 12.Qb4 Rg7+-) 12.Bd5 (12.Bd5 ed5 13.Rb1+-; 12.Rb1?! Bd2 13.Kd1 Qc6 14.Qc6 Bb4 (14...bc6? 15.Nd2 Rg7 16.Rg1+-) 15.Kc2 bc6 16.Bf6 Nf6 17.Rb4 Rg7+=) 1–0. GuestJJTB – GuestRTXP, freechess.org, 2018.

5.c4 Bb4?? 6.Bg7+- Rh7 7.Qb3 Nc6 8.cd5 Qd5 (8...Rg7? 9.dc6 a5 10.cb7+-; worse 8...ed5 9.Bc3 a5 10.Bb5+=) 9.Bc4 Qd7 (9...Qd6!? 10.Bc3 Be4=) 10.Ne5+= Ne5 11.Be5 a5 12.0-0 (12.a3 b5 13.Be2 f6+/-) 12...0-0-0 (12...b5!? 13.Be2 c5+=) 13.a3 Bd6 (worse 13...Bd2 14.Nd2 Qd2 15.Rac1+-) 14.a4?? (better 14.Bd6 Qd6 15.Qc3+=) 14...Be5-+ 15.d4 Bd6 16.Na3 Ba3 17.Rfc1 (17.Ra3 Rg7 18.Ra2-+) 17...Bb4 (better 17...Bc1!? 18.Rc1 Qd6 19.Be2-+) 18.Qd3 (18.Bb5 Qd6 19.Bd3-+) 18…Bd3 (18...Bd3 19.Bd3 Rg7-+) 0-1. LPah - Macleod (1630), Rated Classical game, lichess.org, 2013.

5.c4 Bb4?? 6.Bg7+- Rh7 7.Bc3 Bc3 8.Nc3 dc4 9.Bc4 Nc6 (9...Nd7 10.d4+=) 10.Bb5 Nge7 11.Nd4 Qd6 12.Nf5 Nf5 13.Ne4 Qe5 14.Bc6 (14.Qb1 Kd8+-) 14...bc6 15.Ng3 (15.Nc3 Rg7+-) 15...Ng3 16.fg3 Rg7 17.0-0 Rd8 18.Qf3 (18.Qc2 Qd5+-) 18...Qd5 (18...Rd2 19.Qc6 Ke7 20.Kh1=) 19.Qf6+= Kf8 (19...Rh7!?+=) 20.d4 Qg5 21.Qf3 (21.Qe6 Re8 22.Qc6 Qe3 23.Kh1 Qd4 24.Qh6 Kg8+-) 21...Rd6 (21...c5 22.Rac1 cd4 23.ed4+=) 22.Rab1+- Ke7 (22...c5 23.dc5 Rd3 24.Qa8 Ke7 25.Qa7 Qe3 26.Kh1+-) 23.Rb7+- Kd7 24.Ra7 Rd5 25.Ra6 (25.Rb1!? f6+-) 25...c5+- 26.dc5 Rc5 27.Rd1 Ke7 28.Qf4 (28.Ra8!? Rd5 29.Rc8+-) 28...Qf4+= 29.gf4 Rc2 30.g3 Rc3 (30...Rg8 31.e4 Rb8 32.Ra5=) 31.Re1 (31.a4 Rc2+-) 31...h5 (31...Rc2 32.Rf1+=) 32.Kf2+- c5 33.Re2 c4 34.Rd2 (better 34.Ra8+-) 34...Rd3? (34...Rc1 35.a4+-) 35.Ke2 (better 35.Rd3!? cd3 36.Ra7 Kd6 37.Ra3+-) 35...Rd2 (35...Rc3 36.e4 h4 37.e5 (worse 37.gh4 Rg2 38.Kd1 Rg1 39.Ke2 Rg2 40.Kd1 Rg1 41.Ke2 Rg2=) 37...hg3 38.Ra7 Ke8 39.Rb2+-) 36.Kd2 h4 37.Kc3 (37.gh4 Rg2 38.Kc3 Rh2 39.Kc4 Rh4 40.Ra7 Kf6+-) 37...hg3 38.hg3 Rg3 39.Kd4 c3 40.Rc6 (40.Kc3?! Re3 41.Kd4 Re2=) 40...Rg2 41.Ra6?? (better 41.a3+-) 41...c2-/+ 42.Rc6 Rd2 43.Ke4 f5 44.Kf3 Kd7 (44...Rh2 45.a4=) 45.Rc3= c1Q 46.Rc1 Ra2 ½–½. GuestJHTS – GuestPQCQ, freechess.org, 2017.

5.c4 f6 6.Qb3 (6.Nd4 Qd7+/–) 6...c6 7.Be2 Bd6 8.c5 Bc7 9.0-0 e5 10.d3 Ne7 11.a4 Nd7 12.Nbd2 e4 (12...b6!? 13.Qc2 0-0=) 13.Nd4 White prepares b5 13...ed3 14.Bd3 (14.Bh5 Bg6 15.Ne6 Qb8+=) 14...Bd3+= 15.Qd3 Nf8 (15...Qb8 16.N2f3+=) 16.N2f3 Qd7 17.b5 Kf7 18.e4 de4 19.Qe4 Nd5 20.Rfe1 Ng6 21.Ne6?? (better is 21.Nh4 Ngf4 22.Nhf5+=) 21...Rae8-+ 22.Nfd4 Be5?? (22...Ngf4!? 23.Qf5 Ne6 24.Ne6 Re6 25.Re6 Qe6 26.Qh5 g6 27.Qf3-+) 23.Qf3 Re6 24.bc6 bc6 25.Ne6 Bb2 26.Rad1 (26.Qh3 Be5 27.Ng5 Ke7-+) 26...Ne5 27.Qe2 (27.Qb3 Bc3 (27...Ke6?! 28.Qb2 Kf7 29.Qb3-/+; 27...Qe6?! 28.Qb2 Re8 29.h3-+) 28.Rd5 Qd5 (28...cd5?! 29.Qc3 Qe6 30.f4-/+; 28...Qe6 29.Rd7 Kg6 30.Qe6 Be1 31.Rb7 Bf2 32.Kf2+-) 29.Qc3 Qe6-+ (29...Ke6?! 30.f4+=)) 27...Ba3 (27...Bc3 28.Nd4 Be1 29.Re1-+) 28.f4 (28.Nf4 Bb4 29.Rf1 Bc5 30.Qc2-+) 28...Qe6 (28...Ke6?! 29.Qf2 Qe7 30.fe5-+) 29.fe5 Bc5 30.Kh1 f5 (30...Re8!? 31.Qc4 Bb6 32.Qa6-+) 31.Qc4 Bb6 32.Rd3 Rd8 33.Rf3 g5 0–1. gregorgysi (2570) – mpenga (2585), net–chess.com, 2016.

5.c4 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 h6).

5.c4 Bg4 6.Be2 f6 (6...dc4 7.Bc4 A) 7...Bb4? 8.Qa4 (8.Bg7?! Rh7 9.Bc3 a5+=) 8...Nc6 9.Ne5+- (9.Bg7?! Rh7 10.Ba6 Qb8+/–); B) 7...Nf6=) 7.h3 Bh5 8.cd5 Qd5 9.Nc3 Qd8 (9...Qd7 10.Qb3 Bf7 11.d4+=) 10.g4 (10.Qa4 c6+/–) 10...Bg6 (10...Bf7 11.a3+=) 11.Qb3+= Bf7 12.Bc4 Qe7 13.Nb5 (13.a3 c6+=) 13...c6= 14.Nbd4 e5 15.Nf5 Bc4 (15...Qb4?? 16.Bf7 Kd8 17.Bg8+-) 16.Qc4 Qd7 (< 16...Qb4 17.Ng7 Kd8 18.Qf7 Bg7 19.Qg7 Qb2 20.0-0+-) 17.d4 Na6 (17...e4 18.Nd2 h5 19.0-0-0=) 18.a3 (18.de5 Bb4 19.Ke2+/–) 18...g6? (18...e4 19.Nd2+/–) 19.de5 (better is 19.N5h4!? Qh7 20.de5+-) 19...gf5+/– 20.Rd1 b5 21.Qb3 Qe7? 22.ef6+/– Nf6 23.Nh4 Nd5? 24.Bh8 Qh4 25.Rd4?? 0-0-0+= 26.gf5 Qe7 27.Qd3 Re8 28.f6 Qf7 29.Rg1 Nac7 30.Rg6 Qh7?? 31.Bg7+/– Bg7 32.fg7 Kb7 33.Rdg4 Ne7 34.Rd6+- Qg8 35.Rh6 Qf7 36.Qd7 Rg8 37.Rc6! Rc8 38.g8Q! Qg8 39.Rg8 Ng8 40.Rc7! Rc7 41.Qd5 (41...Kb6 42.Qg8 Rc1 43.Kd2+-) 1–0. pumpkin (2145) – bienopia (2100), net–chess.com, 2003.

5.d3 Bb4!? 6.Nbd2 Nf6 -/+.

5.d3 Nf6 6.a3= Bh7 7.Be2 Bd6 8.c4 Nbd7 9.c5 Be7 10.Nbd2 0-0 11.0-0 b6 12.d4 (12.c6 Nb8 13.Qc2 b5+=) 12...bc5 13.dc5 a5 14.Ne5 Ne5 15.Be5 ab4 16.ab4 Ra1 17.Qa1 c6 18.Nf3 Bg6 19.Bc3 (19.Nd4 Qd7 20.Qa4+-) 19...Ne4? (19...Bh5+=) 20.Bd4?? (better is 20.Bg7 Bf6 21.Bf6 Nf6 22.Ne5+-) 20...Bf6 (20...f6!?=) 21.Bf6+= Nf6 22.Rd1 Ne4 23.Nd4 Qf6 24.Nc6?? Qf2-+ 25.Kh1 Qe2 26.Ne7 Kh7 27.Ng6 Nf2 28.Kg1 Nd1 29.Nf8 Kh8 30.h3 Qf2 31.Kh2 Ne3-+ 32.Qg1 Kg8?? 33.Qf2+- Nf5 34.Nd7 Kh7 35.c6 Nd6 36.c7 Kg6 37.b5! f5 38.b6 Kf7 39.b7 Nb7 40.c8Q Ke7 41.Qb7 (41.Qb7 Ke8 42.Nc5 Kf8 43.Qc8 Ke7 44.Qe6 Kd8 45.Qd7; 41.Qh4 g5 42.Qh6 e5 43.Qf6) 1–0. Fournier,Frederic (1685) – aliho (1625), Active (3/0), 2005.

5.Bd3 Bd3 6.cd3 Nf6 7.Qb3=.

5.Bd3 Be4 6.0-0 Nd7 (6...Nf6 7.a3=) 7.Be4 (7.Nc3 Ngf6=) 7...de4 8.Ne5 Ngf6 9.Nd7 Nd7 (9...Qd7 10.f3=) 10.Qg4 (10.a3 a5+=) 10...Nf6= (worse 10...Bb4 11.Qg7 Rf8 12.Qh6+-) 11.Qe2 c6 12.Bf6 Qf6 13.Nc3 Bb4 14.Ne4 Qg6 (14...Qe7 15.Rab1+=) 15.Qc4+= Be7 16.Rab1 0-0?? (better 16...Rb8+=) 17.Rb7+- (17.Rb7 Rfe8 18.Rfb1+-) 1–0. GuestXMSD – GuestPYRS, freechess.org, 2020.

5.Nd4 Ne7 =.

5.Nd4 Bh7 6.a3 (6.Qe2 A) 6...a6 7.a3 (7.b5 Nd7 8.f4 ab5 9.Qd1-/+) 7...Nf6 8.Qd1 Nbd7 9.Be2=; B) 6...c6 7.a3 (7.Bc3 Nd7 8.Qd1 Ngf6 9.Be2+=) 7...a5 8.Qd1 ab4 9.ab4+=) 6...Qf6 (6...Nf6 7.Be2= (7.Bb5 c6 8.Be2 Bd6 9.f4=) 7...Nbd7 8.Nb3 Bd6 9.0-0=; 6...Nd7 7.Be2 (7.f4 Ngf6 8.Be2 c5 9.bc5=) 7...Ngf6 8.Nb3 Bd6 9.0-0=) 7.c4+= (7.Nc3 c6 8.f4 Nd7 9.Be2+=) 7...c5 (7...Nd7!?+= 8.cd5 ed5 9.Be2+=; 7...c6 8.cd5 ed5 9.Be2+=) 8.bc5+/– Bc5 9.cd5 ed5 (9...Bd4 A) 10.ed4?! ed5 11.Nc3 A1) worse is 11...Qd4 12.Qb3 Nd7 13.Nd5 (worse is 13.Qd5 Qd5 14.Nd5 Kf8+/–; 13.Qb7? Rb8 14.Qd5 Qd5 15.Nd5 Rb2-+) 13...Qe4 14.Be2+-; A2) 11...Ne7=; B) 10.Bd4 e5 11.Bc3+/–) 10.Qb3 Qb6 (10...Qe7 11.Nb5 d4 12.Bd4 Bd4 13.Nd4+/–) 11.Bb5 (11.Nc3 Bd4 12.Bb5 Nc6 13.Nd5 Qd8 14.Bd4 Be4+-) 11...Nc6 (better is 11...Nd7!? 12.Nc3 Ngf6 13.Nd5 Nd5 14.Qd5 0-0 15.Qd7 a6+-) 12.Nc6 bc6 13.Bg7 (13.Bc6 Qc6 14.Bg7 Be3 15.de3 Bc2+-) 13...cb5 (13...Qb5 14.Qb5 cb5 15.Bh8+-) 14.Bh8 (14.Qd5?! Rc8 15.Bh8 Be3+-) 14...Ne7 (14...a6 15.Nc3+-) 15.d4 (15.Nc3 a6+-) 15...Bd6 16.Nc3 Kd7 (16...Rb8 17.0-0 Qc7 18.Rfc1+-) 17.Be5 Bd3 18.Nd5 (18.Bd6 Bc4 19.Bc5 Bb3 20.Bb6 ab6 21.Nb5 Bc4+-) 18...Qa5 19.Kd1 (better is 19.Qc3!? Qc3 20.Nc3 Be5 21.de5 Rc8+-) 19...Bc4 20.Qc3?? (better is 20.Nf6 Ke6 21.Qb2 Be5 22.de5 Rd8 23.Kc1+-) 20...Qa4+= 21.Kd2 Nd5 (21...Nd5 22.Qb2 Qa5 23.Kc2 Be5 24.de5 Rc8-/+; worse is 21...Bd5 22.Bd6 Kd6 23.f3+=) 0–1. marus1 – Crapablanca5, internet, 2001.

5.Be2 Nf6 6.a3 Be7 7.0-0 0-0 8.d4 Nbd7 9.Bd3 Bd3 10.Qd3 b6 11.c4 c5 12.dc5 bc5 13.b5 Nb6 14.Nbd2 (14.cd5 ed5 15.Nbd2 Rc8=) 14...dc4+= 15.Qd8 Rfd8 16.Rac1 Na4 17.Bf6 Bf6 18.Rc4 (worse is 18.Nc4 Nc3 19.Rc2 Nb5-/+) 18...Nb6 19.Rc5 Rac8 20.Rc8 Rc8 21.Ne4 Bb2 22.h3 Rc7 23.Rb1 Ba3 24.Nd4 Be7 25.Nd2 Nd5 26.N2b3 (26.Nc6 Nc3 27.b6 ab6 (27...Rc6? 28.ba7 Ra6 29.Rb8 Kh7 30.a8Q Ra8 31.Ra8+-) 28.Ne7 Re7 29.Rb6 Ra7=) 26...Bf6 27.g3 (27.Ra1 Nc3=) 27...Nc3-/+ 28.Ra1 e5 29.Nc6 Nb5 30.Nb4 (30.Ra6 Kf8-/+) 30...e4 31.Rb1 Nc3-+ 32.Re1?? Na4 33.Nd5-/+ Rc6 34.Nf6 Rf6 35.Ra1 Ra6 36.Nd4 Nc5 37.Ra6 Na6 38.Nc6 Nc5 39.Na7 Kf8 40.Nc8 Ke8 41.Nd6 Ke7 42.Nc4 Ke6 43.Kg2 Kd5 44.Nd2 Nd3 45.h4 f5 46.Nb3 h5 47.Na5 Ne5 48.Nb7 Ke6 49.Nd8 Kf6 50.Nb7 Ng4 51.Nd6 Ne5 52.Ne8 Kf7 53.Nc7 Kf6 54.Nd5 Ke6 55.Nc7 Kd7+= 56.Nb5 Nc4 57.Nd4 Nd6 58.Nb5?? Nb5-+ 0–1. Fournier,Frederic (1735) – Aviatr3000 (1655), Active (5+0), 2012.

5.Be2 Nf6 6.b5 c5 7.c4 Be7 8.0-0 0-0 9.d4 a6 (9...dc4 10.Bc4 Nbd7 11.Nbd2=+) 10.a4 (10.cd5 ed5 11.dc5 ab5=) 10...dc4 11.Bc4 Nbd7 (11...ab5 12.ab5 Ra1 13.Ba1=+) 12.Nbd2= Nb6 13.Be2 Nbd5 14.Qb3 a5 (14...Qc7 15.Rfc1=) 15.Rac1 b6 (15...Rc8!?=) 16.Ne5+- Nb4 17.Nc6 Nc6 18.bc6 Rc8 19.Bf3 (better 19.Qb5+-) 19...Nd5?? (better 19...cd4 20.Bd4 e5+-) 20.e4+- Nb4 (20...Be4 21.Ne4 Rc6+-) 21.ef5 ef5 22.d5 Bd6 (22...Nc6 23.dc6 Qd2 24.Rfe1+-) 23.Nc4 1–0. GuestVWCT – GuestTRNY, freechess.org, 2019.

5.Be2 Nf6 6.b5 Bd6 7.0-0 0-0 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6 7.0-0 0-0).

6.Bc4 Bb4 7.Qa4 Nc6 8.Bb5 +/–.

7.a3 Be7 8.d4 0-0 9.0-0 c6 10.Bd3 Bd3 11.Qd3 Nbd7 12.Nbd2 a5 13.b5 cb5 14.Qb5 b6 15.Rfc1 Rc8 16.Rc8 Qc8 17.Rc1 Qb8 18.Nc4 The backward pawn on b6 becomes a target 18...Rc8 19.Nce5 Rc1 20.Bc1 Ne5 21.Ne5 (worse is 21.Qe5 Qc8 22.Bd2 Ba3-/+; 21.de5?! Qc7 22.Bb2 Nd5=) 21...Qc7 22.Qb2 Nd5 23.g3 (23.Bd2 Bd6=) 23...Qc3 The isolani on a3 becomes a target 24.Qc3 Nc3 25.Nd7?? (better is 25.Kf1=) 25...Ne2-+ 26.Kf1 Nc1 27.Nb6 Ba3 28.Nc4 Bb4 29.Nb2 Nb3 30.Ke2 Kf8 31.Kd3 Nc1 32.Kc2 Ne2 33.Kd3 Ng1 34.Na4 Nf3 35.h4 g5 36.hg5 Ng5 37.f4 Nh7 38.Ke4 Nf6 39.Kf3 Ke7 40.g4 Nd5 41.e4 Nc3 42.Nb2 a4 43.Nd3 Ba5 44.Ke3 a3 45.Nc1 a2 46.Nb3 Bb4 47.f5 ef5 48.ef5 Nd5 49.Ke4 Nf6 50.Kf4 Bc3 0–1. Fournier,Frederic (1865) – lordhenry (1915), Active (5/0), 2005.

7.Qb3 Bd6 8.Nc3 (8.d3 Nbd7=) 8...0-0 9.Ne2 (9.Nb5 Be4=) 9...Nc6 10.a3 Qe7 (10...Be4 11.d3 Bf3 12.gf3+=) 11.d4 e5 (11...Be4 12.Ng3=) 12.d5 Nb8 (12...Nd8 13.0-0=) 13.Ng3 Bh7 14.0-0 Nbd7 15.Rfd1 a5 16.Bc3 a4 17.Qb2 Increases the pressure on e5 17...Ne4 18.Bd3 (18.Ne4 Be4 19.Nd2 Bg6=) 18...f5 (18...Ng3 A) 19.fg3? Bd3 20.Rd3 e4 21.Bg7 A1) 21...ef3?! 22.Bf8 Rf8 23.Rf1+= (worse is 23.gf3 Ne5 24.Rad1 Qf6-/+); A2) 21...ed3 22.Bh6 Be5 23.Ne5 Qe5 24.Qe5 Ne5-+; B) worse is 19.hg3 Bd3 20.Rd3 e4-+; C) 19.Bh7 Kh7 20.hg3=) 19.Be4 fe4 20.Nd2 Qh4 (20...Nf6 21.Nc4=) 21.Nc4+= Rae8 (21...Qf6 22.Qc2+=) 22.Be1 Rf7 23.Rac1 Nf6 (23...Rb8 24.Qc2+=) 24.Rd2 (24.b5 Ref8 25.h3 Rd7+/–) 24...Qg5 (24...b5 25.Nd6 cd6 26.Rc6+=) 25.Qc2 h5 26.Nd6 (26.Ne2 h4+=) 26...cd6= 27.Qa4 h4 28.Nf1 Bf5 29.Rdc2 Bh3 The mate threat is Qxg2 30.g3 Qf5 31.Nd2= Ref8 32.b5 Bg4 33.Rc7 Rc7 34.Rc7 Bf3 35.Qc4 hg3 36.fg3 Ng4 37.Nf1?? Nh6 38.Qc2 Bg4 Threatening mate: Qxf1 39.Bf2?? Bh3 40.Nd2 Ng4 41.Ne4-+ Nf2 42.Nf2 Qf3 (42...Qf3 43.Rg7 Kg7 44.Qc7 Kh8 45.Qh7 Kh7 46.Nh3 Qf1#) 0–1. Labahn,Wolfgang – Gromsch,Norbert, Schleswig Holstein–ch qual, 1998. Even known as "Konik,Michael (1960) – Garski,Rudolf (1870), Ch SWH (b) GER, 1998". Forgery?

7.Qb3 Nbd7 8.0-0 a5 A) 9.ba5 Nc5 (9...Be4 10.d4 Bf3 11.gf3 Bd6=) 10.Qd1 Ra5 11.d4 Na4=; B) 9.a3 ab4 (9...Be4 10.Nd4 ab4 11.ab4 Ra1=) 10.ab4 Ra1 11.Ba1 Qe7=.

7.Qb3 Nbd7 8.0-0 c5 9.bc5 Nc5 10.Qb5 Nfd7 11.d4 a6 =.

7.Qb3 Nbd7 8.Nd4 Be4 A) 9.0-0 c5 (9...Bd5 10.Rc1 Bc4 11.Qc4 c5=) 10.bc5 Nc5 11.Bb5 Nfd7=; B) 9.f3 Bd5 (9...Bg6 10.0-0 Nb6 11.Bb5 Nbd7=) 10.0-0 Bc4 11.Qc4 c5=.

7.Qb3 Nbd7 8.Nd4 Bg6 9.0-0 (9.d3 c6 (9...e5 10.Nf3 c6 11.a4 Qe7=) 10.a4 a5 11.b5 Nc5+=) 9...c6 (9...a6 10.d3= c5 11.bc5 Nc5-/+; 9...a5 10.ba5 Nc5 11.Qd1 e5=) 10.f4 Nb6 11.f5 (11.Be2 Qd5=) 11...ef5 12.Bd3 (12.Nf5 Nc4 13.Qc4 Bf5 14.Rf5 Qd7=) 12...Nbd5 (12...Qd5 13.Qd5 Nfd5 14.b5=) 13.Bf5 Bf5 14.Nf5 g6 (14...Nb4 15.a3 Nbd5 16.Qb7+/–) 15.Ng3 (15.e4 Ne4 16.Bh8 gf5+/–) 15...Be7+= 16.e4 (16.a3 h5+=) 16...Nb4 17.Rf6 Bf6 18.Qb4 Bb2 (18...Qe7 19.Qe7 Ke7 20.e5+=) 19.Qb2 Qb6 20.Qb6 ab6 21.Kf2 b5 22.Ne2 (22.d4 Ke7+=) 22...Ke7 (22...b4 23.d4=) 23.d4+= Ra5 (23...b4 24.Nd2=) 24.Nd2 b6 (24...Ra3 25.Nc1+=) 25.Nc1 (25.Nf3 b4+=) 25...Rc8 (25...Ra4 26.Ke3+=) 26.Nd3 (26.Rb1 f5+=) 26...Ra3 (26...c5 27.dc5 bc5 28.Nb3+=) 27.Nb4 Kd6 (27...f5 28.e5+=) 28.Nf3 f6 (28...c5 29.e5 Kd7 30.Nd5+/–) 29.Rc1 (29.e5 Ke6+/–) 29...c5 (29...Ra4 30.Rb1 c5+=) 30.e5 (better is 30.Nd5!? Ra2 31.Kg3+=) 30...fe5+= 31.de5 Ke7 (31...Ke6 32.Nd4 Ke5 33.Re1 Kf6 34.Nd5 Kg7 35.Re7 Kg8 36.Ne6 (worse is 36.Nb5 Rf8 37.Ke1 Ra2-/+) 36...Rf8 37.Nf8 Ra2 38.Kf3 Kf8 39.Re6+=) 32.Nd5 (32.Rc2 Rca8 33.Nd5 Kd8=) 32...Ke6+= 33.Nb6? (better is 33.Rd1!? Ra2 34.Kg3+=) 33...Ra2-+ 34.Kg3 Rb8 35.Rc5 Rb6 36.Nd4 Ke7 37.Rb5 (37.Rc7 Kd8 38.Rh7 b4 39.Rh8 Ke7 40.Rh6 b3 41.Rh7 Kf8-+) 37...Rb5 38.Nb5 Ke6 39.Nd4 (39.Nd6 Re2-+ (39...Ke5?! 40.Nf7 Kd4 41.Nh6-/+)) 39...Ke5 40.Nf3 Kf6 41.h4 (41.h3 Ke6-+) 41...Ra3 (41...Kf5 42.Nd4 Ke5 43.Nf3 Ke4 44.Ne1-+) 42.Kg4 Ra4 43.Kh3 Kf5 44.g3 (44.Kg3 g5-+) 44...Ke4 (better is 44...g5 45.Ng1-+) 45.Ne1? (45.Nh2-+) 45...Ra2 46.Ng2 (46.h5 g5 (worse is 46...gh5 47.Ng2-+) 47.Kg4 Ke3-+) 46...g5 47.hg5 hg5 48.g4 Kf3 49.Ne1 Ke2 50.Ng2 (50.Nf3 Ra3 (50...Kf3?!) 51.Kg3 Rf3 52.Kg2 Ke3 53.Kg1 Rg3 54.Kh2 Kf2 55.Kh1 Rh3) 50...Ra3 0–1. De Visser,Arno – Jansen,P, Sas van Gent, 1992.

7.Qb3 Be4 8.Nc3 Bf3 9.gf3 =.

7.Nd4 =.

6.a3 Nf6 7.d4 Nbd7 8.Nc3 Bd6 9.c5 Bc7 10.b5 Ba5 11.Nd2 e5 12.Be2 Qe7 13.0-0 0-0 14.Nb3 Bc7 15.Re1 Ne4 16.g3 Qf6 17.Bf3 Nf2?? (better is 17...Nc3 18.Bc3 e4=+ (< 18...cb5 19.Bd5 Rab8 20.a4+=)) 18.Kf2+- e4 19.Be2 h5 20.Kg1 h4 21.g4 Qg5 22.Bc1 h3 23.Kh1 Be6 24.Rg1 f5 25.gf5 Qf5 26.Rf1 Qg5 27.Rg1 (27.Rf8 Rf8 28.Qg1 Qg1 29.Kg1 Rf6+-) 27...Qh4?? (27...Qf5 28.Ra2 Rf7+-) 28.Nd2 Rf2 29.Nf1 Raf8?? (29...Rg2 30.Rg2 hg2 31.Kg2 Rf8-+) 30.Qe1 Bh2?? (better is 30...Qf6+/–) 31.Nh2+- Rh2 (31...Qd8+-) 32.Kh2 Rf2 33.Kh1 Nf6 (33...Qf6 34.bc6 bc6 35.Rb1+-) 34.Nd1 Ng4 (34...h2 35.Rg7! Kg7 36.Qf2 Qh3 37.Qh2 Qh2 38.Kh2 cb5 39.Bb5 Kf8+-) 35.Bg4 Bg4 36.Qf2 (36...Bf3 37.Kh2 Qf2 38.Nf2 cb5 39.Nh3+-) 1–0. Wilk,Adam – Kozaczuk,Witold (2005), Poland–chT region, 1999.

6.a3 Nf6 7.Be2 Bd6 8.d3 0-0 9.Nbd2 Bc7 (9...Nbd7 10.0-0+=) 10.0-0= Nbd7 11.Rc1 e5 12.cd5 cd5 (12...Nd5? 13.e4 Be6 14.ed5 Bd5 15.Qc2+-) 13.h3 Rc8 14.Qb3 Qe7 Black prepares the advance e4 15.Rfd1 Bb8 16.Nf1 Be6 17.d4 e4 18.N3d2 Nh7 19.Rc8 (19.Nh2 Ndf6=) 19...Rc8+= 20.Rc1 Rc1 21.Bc1 Qg5 22.f4 Qg6 23.Kh2 Qf6 24.Qd1 (24.Ng3!? Qh4 25.Nde4 de4 26.d5 Bh3 27.gh3-/+) 24...g5-/+ 25.g3 gf4 26.gf4 (26.ef4 Qd4 27.Kg2 Qg7-/+) 26...Qh4-+ 27.Bg4 Ndf6 (better is 27...f5!? 28.Be2 Ng5-/+) 28.Be6= fe6 29.Qe2? (better is 29.Kg2=) 29...Ng5-+ 30.Qg2 Kf8 31.Qg3 Qh5 32.Kg2 Qe2 (32...Bc7!?-/+) 33.Qf2+= Qf2 34.Kf2 Nh3 35.Kg2 Nf4 36.ef4 Bf4 37.Ne4?? (better is 37.Nb3 Nh5 38.Bf4 Nf4 39.Kg3 Ne2 40.Kg4=) 37...Bc1-+ 38.Nf6 Bb2?? (better is 38...Ba3 39.b5 Bb2 40.Nd7 Ke7-+) 39.Ne3 Bd4 40.Neg4 (40.Nfg4+=) 40...h5 (better is 40...b5 41.Nd7 Ke7-/+) 41.Kf3?? (better is 41.Nh5 b5 42.Nf4=) 41...hg4-+ 42.Ng4 Ke7 43.Ke2 Kd6 44.Kd3 Bb2 45.a4 e5 Black intends d4 46.Nf2 (46.Kc2 Ba1-+) 46...e4 47.Kc2 Bg7 48.Nd1 (48.Kd2 Ke5-+) 48...d4 49.Nf2 (49.Nb2 Kd5-+) 49...Kd5 50.Nd1 (50.b5 Be5 51.a5-+) 50...Kc4 51.b5 (51.Nb2 Kb4 52.Kd2 d3-+) 51...Kb4 (better is 51...d3 52.Kd2 Bd4 53.a5 e3 54.Ne3 Be3 55.Ke3-+) 52.b6 a6 53.Nf2 e3 54.Ne4 Be5 55.Kd3 Ka4 56.Nc5 (56.Kc4 e2 57.Nc5 Ka5-+) 56...Ka5 (better is 56...Kb5 57.Nb3-+) 57.Nb7 (57.Nd7 Bg7 58.Nc5-+) 57...Kb6 58.Nd8 Kb5 59.Nf7 Bg7 60.Nd6 (60.Nd8 a5 61.Ne6 Be5-+) 60...Kb4 61.Nf5 Bf6 62.Ng3 Kb3 (62...a5 63.Nh5 Be5 64.Ke4-+) 63.Ne4 Be7 64.Kd4 (64.Ng3-+) 64...e2 65.Nd2 Kc2 66.Nf3 Bb4 67.Kc4 e1Q 68.Nd4 Kb2 0–1. Franco Rincon,David (1720) – Raya Rodriguez,Juan (1645), 26th Torneo San Viator, 2016.

6.a4 Nf6 7.b5 a5 8.Be2 Be7 9.Nc3 0-0 10.Qb3 (10.cd5 ed5 11.0-0 c5=) 10...Nbd7 11.d4 dc4 (11...cb5 12.Qb5 dc4 13.Nd2=) 12.Bc4 Nb6 13.Be2 Nbd5 14.Nd5 Nd5 15.0-0 Rc8 16.Rfc1 Nb4 (16...cb5 17.Bb5 Qd6 18.Ne5=) 17.bc6 (17.Ne5 Be4=) 17...Rc6 (17...bc6 18.Ba3=) 18.Rc6 (18.Ne5 Rc7 19.Rc7 Qc7=) 18...bc6= 19.Rc1 Be4 20.Nd2 Bd5 21.Qd1 f5 22.Ba3 Bd6 23.Bf3 Qd7 24.Nc4 Bc7= 25.g3 Rb8 26.Ne5 Be5 27.de5 Qb7 28.Bd5 cd5 29.Rc5 Qa6 30.Kg2 Nd3+= 31.Rc3 Ne5-+ 32.Qd4 Rb1 33.Bc1 Nc4 34.g4 fg4 35.Qg4 Qd6 36.e4 Kh7 37.Bh6 gh6-+ 38.Rg3 Qf8 39.ed5 ed5?? 40.Qd7?? Kh8= 41.Qd5 Rb4 42.Qd4 Kh7 43.Qe4 Kh8 44.Qd4 ½–½. Broca,Alexandre (2120) – Schetchikov,Vladimir (2315), Paris op, 1998.

6.a4 Nf6 7.b5 Qb6 8.Nc3 Bb4 9.Be2 Nbd7 10.0-0 0-0 11.d4 dc4 12.Bc4 cb5 13.ab5 Rfc8 14.Bd3?? (better 14.Qb3 Bc3 15.Bc3=) 14…Bc3-+ (14...Bc3 15.Bc3 Rc3 16.Bf5 ef5-+; 14...Rc3?! 15.Bf5 ef5 16.Bc3 Bc3 17.Rc1-/+) 0–1. GuestYCWV – GuestJLV, freechess.org, 2018.

6.a4 Nf6 7.b5 Bd6 8.cd5 cd5 9.Be2=.

6.a4 Nf6 7.b5 Be7 8.Be2 Nbd7 9.d4 0-0 10.0-0 Ne4 11.Nbd2 Nd2 (11...Rc8 12.Ne4 Be4 13.Nd2=) 12.Nd2 (12.Qd2 cb5 13.cd5 Rc8+=) 12...Nf6 (12...Rc8 13.Rc1=) 13.f3 (13.Ba3 Rc8=) 13...Bg6 (13...Rc8 14.c5=) 14.c5 Nd7 (14...Rc8 15.Rc1=) 15.e4 (15.Qb3 Rc8=) 15...Bf6 (better 15...de4 16.Ne4 Rc8=) 16.Bd3 (better 16.e5!? Be7 17.Rc1=) 16...Nc5!-/+ 17.Qc2 (17.dc5 Bb2 Pinning (17...Bb2 Deflection)) 17...Nd3 (17...de4 18.Qc5 ed3 19.Ne4-+) 18.Qd3-/+ c5! 19.f4 (19.dc5 Bb2 Pinning (19...Bb2 Deflection)) 19...de4 20.Ne4 Bd4 21.Kh1?? (better 21.Bd4 Be4 22.Qe4 Qd4 23.Qd4 cd4 24.Rfd1-+) 21…Bb2 (21...Bb2 22.Qd8 Rfd8-+ (22...Be4?! 23.Qc7-/+)) 0–1. GuestPYDG – thesaltydog, freechess.org, 2018.

6.Qb3 Nf6 7.d4 (7.Nd4 Be4=) 7...Be7 8.Nc3 0-0 9.Be2 Nbd7 (9...dc4 10.Qc4 b5 11.Qb3=+) 10.0-0 Ne4 (10...dc4 11.Qc4 Nb6 12.Qb3=) 11.a4 (11.Ne4 Be4 12.a3 Bd6=) 11...Nc3 (11...dc4 12.Qc4 Nb6 13.Qb3=) 12.Bc3 (12.Qc3 dc4 13.Bc4 Bd6+=) 12...dc4 13.Bc4 Nb6 14.Be2 Qd5 15.Qb2 Nc4 16.Qa2 Nd6 17.Nd2 (17.Rfc1 Ne4 18.Qb2 Rfd8=) 17...Qa2 (17...Rfe8 18.Rfc1=) 18.Ra2 Ne4 19.Ne4 Be4 20.Rb2 Rfd8 21.Rc1 Rd7 22.f3 Bh7 23.Kf2 Rad8 24.Rd2 e5 25.Rcd1 ed4 26.Rd4 Rd4 27.Rd4 Rd4 28.ed4 Bc2 29.a5 Bb3 30.b5 Bd5 31.bc6 bc6 32.a6 Bd6 33.g3 Kf8 34.Bd3 g6 35.Ba5 Ke8 36.Bb6?? Bb8?? 37.Bc5+= Kd7 38.h4 h5 39.g4 Ke6 40.Ke3 Kd7 41.gh5 gh5 42.f4 Ke6 43.Bf1 Kf5 44.Bh3 Kf6 45.Bd7 Bg2 46.Bc8 Bd5 47.Kd3 Bg2 48.Kc4 Bd5 49.Kb4 Bg2 50.Bd7 Bd5 51.f5 Be4 52.Bf8 Bc7 53.Kc4 Bf3 54.Kc5 Bb6 55.Kd6 Bd4 56.Be7 Kg7 57.Bc6 Be2 58.Bb7 Be3 59.Bc8 Bc4 60.Kc6 Be2 61.Kd5 Bf2 62.Ke5 Bg3 63.Ke4 Bb8 64.f6+/– Kg8 65.Bc5 Bd1 66.Kd3 Bf3 67.Bf5 Bc6 68.Kc4 Bf3 69.Bd3 Bg2 70.Be2 Bh3 71.Kb5 Bd7 72.Kb4 Bf5 73.Kc4 Bh3 74.Bd3 Bg4 75.Kd4 Bf3 76.Ke3 Bd5 77.Be2 Be5 78.Bh5 Bc4 (better is 78...Bf6!? 79.Ba7 Bc4+/–) 1–0. Fahrner,Kurt (2330) – Benesch,Heribert (2060), St Veit op, 1995.

6.b5 Nf6 7.a4 Be7 8.Be2 dc4 9.Bc4 (9.Na3 c3 10.dc3 0-0=) 9...Bd3 (9...cb5 10.ab5 Nbd7 11.0-0=) 10.Qb3 Bc4 11.Qc4 0-0 12.0-0 Qd5 (12...Nbd7 13.Nc3=) 13.Qc2 cb5 14.Nc3 Qd7 (14...Qh5 15.ab5 Rc8 16.Ra5=) 15.ab5+= Rc8 16.Ne5 (16.Rfc1 Qd8+=) 16...Qb5 (16...Qc7!? 17.Nf3 Qd7=) 17.Nb5+= Rc2 18.Bc3 Nc6? (18...Nd5 19.Nd4 Nc3 20.Nc2 Bf6 21.dc3 Be5+-) 19.Nc6+- bc6 20.Nd4 Rc3 21.dc3 c5 (21...Ne4 22.Nc6 Bf6 23.Rfb1+-) 22.Nc6 Nd5? (22...Bd8+-) 23.c4 (23.c4 Nb4 24.Ra7 Ra7 25.Na7+-) 1–0. GuestRCLM – thesaltydog, freechess.org, 2019.

6.c5 Nf6 7.Be2 Nbd7 (7...a5 8.a3=) 8.0-0 Qc7 (8...a5 9.a3=) 9.d4 (9.Nc3 b6 10.d4 Be7=) 9...Be7 10.Nbd2 (10.Nc3 0-0=) 10...0-0 11.Nh4 Bh7 12.g4 (12.a4 b6=) 12...Ne4 (12...Ng4!? 13.Bg4 Bh4-/+) 13.Ng2 Nd2 14.Qd2 e5 (14...b6 15.f3=+) 15.de5= Ne5 16.f4 (16.Nf4 Rad8=) 16...Nd7=+ 17.Bd3 (17.f5 Nf6=+) 17...Bd3-/+ 18.Qd3 Bf6 (18...a5 19.a3-/+) 19.Bd4=+ Bd4 (19...Rfe8 20.Rae1=+) 20.Qd4 (20.ed4 Nf6 21.Qf5 Rae8=) 20...Rfe8 21.Nh4 (21.g5 Re4 22.Qd2 hg5 23.fg5 Ne5-/+) 21...Re4 22.Qc3 Rae8 (22...Qd8!? 23.Nf5 Qf6-/+) 23.Nf5= Nf6 24.Rf3 (24.g5 hg5 25.Nd6 g4=) 24...R8e6 (24...d4 25.Qc1=+) 25.Rg3 White prepares the advance g5 (25.Nd4 Ng4 26.Ne6 Re6=) 25...Ne8 (25...Kh7 26.g5 hg5 27.Ng7 Kg7 28.fg5=+) 26.g5= hg5 (26...Rc4 27.Qd2 hg5 28.Rg5=) 27.Rg5 Now all is on g7 27...Rg6 (27...g6 28.Nd4 Rf6 29.Rd1=) 28.Rg6 fg6 29.Ng3 Rc4 30.Qd3 (30.Qd2 g5 31.f5 Nf6=+) 30...Qf7 (30...Rb4 31.Qg6 Qf7 32.Qd3=+) 31.Rf1 (31.Rb1 Nf6=) 31...Nf6 (31...Rb4 32.Qa3 Rc4 33.Qa7=+) 32.a3= Ne4 33.Rf3 (33.Ne4 Re4 34.Rf2 Qf5=) 33...Ng3 (33...Rc3 34.Qd4 Qf6 35.Qf6 gf6 36.Ne4 de4 37.Rg3-/+) 34.Rg3= Attacks the isolani on g6 (worse 34.hg3 Qf5 35.Qb3 Qe4-/+) 34...Qf5 35.Qf5 (35.Qd1!?=+) 35...gf5-/+ 36.Rg5 (36.h4 Rc3-/+) 36...Rc3 37.Kf2 Ra3 38.Rf5 (38.h4 Ra4 39.h5 Rb4-/+) 38...Ra2 (38...Rb3 39.Re5-/+) 39.Kg3 (39.Kf3 Rh2 40.Re5 Rb2-/+) 39...Rb2 40.Re5 Rb4 41.h4? (41.Re7 a5-+) 41...a5 (41...Re4!? 42.Rg5 Re3 43.Kf2-+) 42.h5 (42.Kf3 Kf7 43.Rf5 Ke6 44.Re5 Kf6-+) 42...a4 (better 42...Re4 43.Rg5 Re3 44.Kg4 Kh7-+) 43.Rg5?? (43.Re8!? Kh7 44.Ra8-/+) 43...Kf7 (43...a3 44.Kg4-+) 44.f5?? (better 44.Rf5 Ke7 45.Rg5-+) 44...a3 45.f6 Kf6 46.Rg6 Kf7 47.Kf3 a2 48.h6 Kg6 49.h7 (49.hg7 Kg7 50.e4 a1Q 51.Ke3 Qc3 52.Ke2 Rb2 53.Kd1 Qd2) 49…Kh7 (49...Kh7 50.Kf2 Rb2 51.Kg3 a1Q 52.e4 Qf1 53.ed5 Rg2 54.Kh4 Qh1; 49...a1Q 50.Kg2 Rb2 51.Kg3 Qe1 52.Kf3 Kf5 53.h8Q Qf2) 0–1. GuestTJMB – lemonjuicer, freechess.org, 2018.

6.cd5 cd5 7.Bb5 Nd7 8.Ne5 (8.a3 Ngf6=) 8...Ngf6 9.g4 (9.a3 a6 10.Nd7 Nd7=+ (worse 10...ab5 11.Nf8 Rf8 12.Qe2+=)) 9...Be4 (9...Bh7 10.a3=+) 10.f3 Bb1 (10...Bh7 11.a3=+) 11.Rb1= a6 12.Bd7 Nd7 13.Nd7 (13.Rc1 h5 (worse 13...Bb4 14.Nd7 Qd7 15.Bg7+=) 14.Nd7 Kd7 15.Qa4 b5=+) 13...Qd7 14.0-0 (14.a3 f6=+) 14...f6=+ 15.e4 (15.Bd4 Bd6=+) 15...de4 16.fe4 e5 (16...Bb4 17.Bf6 Bd2 18.Be5-/+) 17.Bc3 (17.d4 ed4 18.Bd4 0-0-0=) 17...Be7 (17...Rc8 18.Qf3=) 18.Kg2 (18.Qf3 Rc8=) 18...0-0 19.h3 (19.Rc1 Rac8=) 19...Rfd8 20.Qb3 Kf8 (20...Kh7 21.a3=+) 21.Rbe1 (21.Be5 Qd2 22.Rf2 Qg5=) 21...Rac8 22.Re3 Qc6 (22...Qb5 23.a3=) 23.a3 Qc4 (23...Qb5 24.Qb2 Kg8 25.Qb3 Qc4 26.Qc4 Rc4 27.Rc1=+) 24.Qc2 (24.Qc4 Rc4 25.Be5 Rd2 26.Kg3 Kg8=+) 24...Rd7 (24...b5 25.Rc1=+) 25.Rc1 Rdc7 26.Qa4 (better 26.Qb1=+) 26...Qb5 (better 26...Bc5 27.Ree1 Bd4-/+) 27.Qb5+= ab5 28.Rd3 Ke8 29.Rd5 Rc4 (29...Ra8 30.Bb2 Rd7 31.Rd7 Kd7 32.Kf3+=) 30.Rb5 R8c7 (30...R4c7 31.Kf3+-) 31.Kf3+- Rd7 (31...R4c6 32.h4+-) 32.Ke3 Bd8 (32...Rc6 33.Ra5+-) 33.Bb2 Rc1 34.Bc1 Rc7 35.Bb2 b6 36.Kd3 (worse 36.Rb6 Rc2 37.Rb7 Rb2 38.Rg7 Rb3 39.d3 Be7-/+) 36...Rc6 (36...Rc8 37.h4+-) 37.a4+- Kd7 38.Rd5 Kc7 39.a5 (39.b5 Rd6+-) 39...ba5 40.ba5 Ra6 (40...Be7 41.Ke3+-) 41.Ba3 1–0. DEFFM – lemonjuicer, freechess.org, 2018.

6.Be2 Nf6 7.b5 cb5 (7...dc4 8.Bc4 a6 9.a4=) 8.cb5 (8.cd5 ed5 9.Nd4 Bd7 10.Nb5 Be7=) 8...Nbd7 9.d4 (9.0-0 Rc8=) 9...Bb4 10.Nbd2 Rc8 11.0-0 Bc2 12.Qe1 Ne4 13.Bd1? (13.a3 Ba5=) 13...Qb6?? (better 13...Nd2 14.Nd2 Qa5-+) 14.Qe2 (14.Rc1 Nd2 15.Nd2 Qa5 16.Rc2 Rc2 17.Bc2 Bd2=) 14...Nd2 15.Nd2 1–0. GuestVMDM – GuestSGWT, freechess.org, 2018.

7.a3 Nf6=.

7.b5 Nf6 =.

7.Nd4 Bg6 =.

7.Be2 Bb4 8.Bg7 Rh7 9.Bc3 Bd6 10.Qb3 Qd7 11.Nd4 Bg6 12.f4 f5 13.Nf3 Na6 14.Ne5 Be5 15.Be5 Nc5 16.Qa3 Ne4 17.Nc3 Ngf6 18.d3 Nc3 19.Qc3 Ng4 20.d4 Ne5 21.de5 Bf7 22.0-0 Be6 23.Bh5 Kf8 24.Qb4 Kg8 25.Rf3 Rg7 26.Rb1 b6 27.Rc1 c5 28.Qe1 d4 29.Rd1 d3 30.Qc3 c4 31.Rg3 b5 32.Bf3 Rb8 33.Rg7 Kg7 34.h3 b4 35.Qe1 c3 36.Qf1 Bc4 37.Qf2 d2 38.Qg3 Kh7 39.Bh5 Rg8 40.Qf2 c2 41.Rd2 c1Q 42.Rd1 Qcd1 43.Bd1 Bd5 44.Kh2 Rg2 45.Qg2 Bg2 46.Kg2 Qd1 47.e6 Qd8 48.Kf3 Qe7 49.e4 fe4 50.Ke4 Qe6 51.Kf3 Qa2 52.f5 Qd5 53.Kf4 Kg7 54.h4 Kf6 55.h5 Qe5 56.Kf3 Kf5 57.Kf2 Qe4 58.Kg3 Qe3 59.Kh4 Qf4 60.Kh3 Qg5 61.Kh2 Kf4 62.Kh3 Kf3 63.Kh2 Qg2 Normal 0-1. carlos78 (2230) - Tvivelaktig (2015), Rated Blitz game, lichess.org, 2015.

7.Be2 Nf6 8.b5 (8.a3 Bd6=) 8...Qb6 (8...Bd6!?=) 9.Bf6+= gf6 10.Nc3 Bg7 (10...Rg8!?+=) 11.Qa4 (11.bc6 bc6 12.0-0 Rg8+-) 11...0-0 (11...Kd8 12.bc6 bc6 13.0-0+-) 12.Qf4 (12.bc6 bc6 13.Rc1 Rc8+-) 12...Bh7 (12...Be4 13.Rc1 Re8 14.0-0+-) 13.Nd4 (13.bc6 bc6 14.0-0 Re8+-) 13...Nd7 (13...a6 14.bc6 Qb2 15.0-0 Nc6 16.Bf3+-) 14.0-0 (14.Na4 Qa5 15.bc6 Qa4+-) 14...Nc5 (14...Ne5 15.bc6 bc6 16.Nf5 Bf5 17.Qf5+-) 15.bc6 (15.Nf5 Bf5 16.Qf5 cb5+-) 15...bc6 (15...Ne6 16.Ne6 (worse 16.Nd5 Nf4 17.Nb6 Ne2 18.Ne2 ab6=+) 16...fe6 17.cb7 Qb7 18.Rac1+-) 16.Rfb1+- Bb1 17.Rb1 Qd8 18.Nc6 Qd7 19.Nd5! Ne6 (19...Qd5 20.Ne7 Double attack (20.Ne7 Decoy)) 20.Nce7 Kh8 21.Qf5 Nc5 22.d4 Qf5 23.Nf5 Ne6 24.Rb7 Rab8 (24...Rfb8 25.Rf7 Rb1 26.Bf1+-) 25.Ra7 Rb1 26.Bf1 Rc8 27.Rf7 Rcc1 (27...Ng5 28.Re7+- (28.Rg7?! Rcc1 29.Ng3 Kg7+=; 28.Ng7? Rcc1 29.h4 Rf1 30.Kh2 Nf7-+)) 28.Ng3 Ng5 (28...Rb5 29.Rd7+- (29.Nf6?! Nd8 30.a4 Nf7 31.ab5 Bf6+-)) 29.Re7 f5 30.f3 h5 (30...Ra1 31.h4 Nh7 32.Ra7+-) 31.h4 Nh7 (31...Bf8 32.Re8 (32.hg5?! h4 33.Rc7 Rc7 34.Nc7 hg3+-) 32...Nh7 33.Nf4+-) 32.Rf7 Ra1 33.Rf5 Ra2 34.Rh5 Rcc2 (34...Kg8 35.Ne7 Kh8+-) 35.Nb4 1–0. DEFFM – GuestRVLD, freechess.org, 2018.

6.a3 Nd7 7.c4 Ngf6 (7...Ne7 8.Nc3 a5 9.cd5 Nd5=) 8.cd5 Nd5 9.Nc3 Nc3 =.

6.a3 Nd7 7.Be2 e5 8.Nf3 Bd6 9.Nc3 c6 =.

6.a3 Nd7 7.Be2 Ngf6 8.0-0 c5 9.bc5 Bc5 =.

6.a3= Nd7 7.Be2 Ngf6 8.Nb3 Bd6 9.0-0 =.

6.a3 Nf6= 7.Bb5 c6 8.Be2 Bd6 9.0-0 e5 =.

6.a3= Nf6 7.Bb5 c6 8.Be2 Bd6 9.f4 =.

6.a3 Nf6= 7.Bb5 Nbd7 8.0-0 c5 9.bc5 Bc5 =.

6.a3 Nf6= 7.Be2 c5 8.bc5 Bc5 9.0-0 0-0 =.

6.a3 Nf6= 7.Be2 Nbd7 8.0-0 c5 9.bc5 Bc5 =.

6.a3= Nf6 7.Be2 Nbd7 8.Nb3 Bd6 9.0-0 =.

6.c4 dc4 7.Bc4 Qg5 (7...Nd7 8.a3= a5 9.ba5 Ra5=; 7...Nf6 8.0-0 Nbd7 9.a3 c5=) 8.Qf3 (8.0-0 c6 (8...Nd7+= 9.Be6 Nb6+/–) 9.f4 Qd8+=) 8...c6= (8...Bb4?? 9.Qb7 Be4 10.Qe4+-) 9.a3 (9.h4 Qf6=) 9...Nf6 (9...e5 10.Ne2=; 9...Nd7=) 10.Nc3 (10.Qh3 Be4 11.f3 Bd5 12.Bd5 Nd5= (12...ed5?? 13.Qc8 Ke7 14.Nf5 Qf5 15.Qf5+-)) 10...Be7 (10...e5 11.h4 Qh5 12.Qh3=) 11.h4 Qh5 12.Qg3 0-0?? (better is 12...Qg4 13.Qc7 Qg2+/–) 13.Be2+- Qe2 (13...c5 14.Bh5 Nh5+-) 14.Nce2 Bd3 (14...Na6 15.Nf4 Bh7 16.Nf3+-) 15.Qc7 Nbd7 16.Qb7 1–0. marus2 – queen2bee, internet, 2001.

6.c4 Nd7 A) 7.c5 Ne7 (7...e5 8.Nf3 Bh5 9.Qa4 Bf3=) 8.Bb5 c6 9.Be2 a5=; B) 7.cd5 ed5 (7...e5 8.Nf3 e4 9.Ne5 Ne5+=) 8.a3 Ngf6 9.Be2 a5=.

6.c4 Nf6 7.a3 a5 (7...Nbd7 8.cd5 Nd5 9.Nc3 Nc3=) 8.c5 Be7 9.Qa4 c6 =.

6.c4 Nf6 7.Nc3= dc4 (7...a5 8.ba5 Ra5 9.cd5 ed5=) 8.Bc4 Nbd7 9.Qb3 a5 =.

6.c4 Nf6 7.Be2 a6 (worse is 7...Bb4 8.Qa4 Nbd7 9.Qb4+=) 8.0-0 c5 (8...dc4 9.Bc4 b5 10.Be2 Bb4 11.a4=) 9.Qa4 Nbd7 10.bc5 Bc5 11.cd5 Nd5 12.Nf3 0-0 13.d4 Bd6 14.Nbd2 Rc8 15.Rac1 Qe7 16.Qb3 Bh7 17.Nc4 (17.Qb7? Rb8 18.Qa6 Rb6-+) 17...b5 18.Nd6 Qd6 19.Ba3 b4 20.Bb2 Qb6 21.Bc4 Qb7 22.a4 N7b6 23.Be2 a5 24.Ne5 Rc1 25.Rc1 (worse is 25.Bc1 Nc3 26.Bf3 Be4-/+) 25...Rc8 26.Rc5 Rc5 (26...f6 27.Bg4 Bf5 28.Bf5 ef5 29.Nd3 Rc5 30.dc5+=) 27.dc5 f6 28.Nc4 Nc4 29.Bc4 Qc6 30.Bd4 Nc7 31.f3 Bg6 32.e4 Kf8 33.Kf2 Be8 34.Bb5 Nb5 35.ab5 Qb5 36.Qe6 Qc6 37.Qf5 Qd7 38.Qd5 Qc6 39.Ke3 a4 40.Kd3 Qb5 41.Kd2 Qc6 42.Kc2 Qb5 43.Kd2 Qd7 44.c6!+/– Qd5 45.ed5 Kf7 46.Bc5 b3 47.Ba3 f5 48.Kc3+- g5 49.Kd4 1–0. Lauko,Marian (1870) – Kroo,Michal, Strmilov op, 2005.

6.Qe2 a6 7.a3 Bd6 8.c4 dc4 9.Qc4 Nd7 +=.

6.Qe2 a6 7.a3 Nf6 8.c4 dc4 9.Qc4 Nbd7 +=.

6.Qe2 a6 7.a3 Nf6 8.d3 Nbd7 9.Nf3 +=.

6.Qe2 a6 7.b5 ab5 8.Qb5 Nd7 9.Be2 c6 +=.

6.Qe2 a6 7.b5 Nd7 8.f4 ab5 9.Qb5 c6 -/+.

6.Qe2 a6 7.b5 Nd7 8.f4 ab5 9.f5 -/+.

6.Qe2 c6 7.a3 Nd7 (7...Nf6 8.c4 dc4 9.Qc4 Nbd7=) 8.c4 dc4 9.Qc4 e5 +=.

6.Qe2 c6 7.Bc3 Nd7 8.Qd1 Ngf6 9.Be2 +=.

6.Qe2 c6 7.Kd1 Bd6 (7...Nf6 8.a3 Bd6 9.f4 Bh5+=) 8.b5 Nf6 9.f4 a6 -/+.

5.Bg7+- e5 6.c3 ef4 7.Qa4 Nc6 8.Bh8 +- (8.cb4?! Qh4 9.g3 fg3+=).

5.Bg7+- Qh4 6.g3 Qe7 7.Bh8 Be4 (7...Nf6 8.a3 Ba5 9.Bd3+-) 8.Nf3 Nd7 (8...Nf6 9.c3 Bd6 10.c4+-) 9.Bc3 Bc3 (9...Bc5 10.d4 Bb6 11.a4+-) 10.Nc3 Ngf6 11.Be2 0-0-0 12.Rb1 Nb6 13.Qc1 a6 (13...Rg8 14.Qb2+-) 14.Qb2 Rd6 (14...Rg8 15.0-0+-) 15.Ne4 (15.Ne4 Ne4 16.Qh8 Rd8 17.Qh7+-) 1–0. Pierre – Elbeling, internet, 2019.

5.a3 a5 6.b5 c5 7.bc6 (7.Nf3 Bd6=) 7...bc6 8.Nf3 Nbd7 9.Be2 (9.Nc3 Rb8 10.Rb1 Bc5=) 9...Rb8=+ 10.Bc3 Be7 (10...Bc5 11.0-0=+) 11.0-0 h6 (11...Bg4 12.Ne5 Be2 13.Qe2 Ne5 14.Be5=) 12.d3 (12.Nd4 Qc7+=) 12...0-0 13.Qd2 Bh7 (better 13...a4!?=) 14.Ba5+/- Qc8 15.Bc3 Bc5 16.d4 (16.a4!?+/-) 16...Ne4+= 17.Qe1 Nc3 (17...Be7 18.Bd3+=) 18.Nc3 (18.Qc3 Bd6+=) 18...Bd6 (18...Be7 19.Qd2+=) 19.Bd3 (19.Ra2 Nf6+=) 19...c5 (19...Bd3 20.cd3 Rb3 21.Qc1+=) 20.Bh7 Kh7 21.Ne5 Be5 (21...Kg8 22.Qg3+=) 22.fe5+/- cd4 23.ed4 Qc4 24.Qd2 1-0. sezwho (2055) - kabalist (2165), Rated Bullet game, lichess.org, 2014.

5.b5 c5 6.Nf3 Be7 7.c4 0-0 8.Be2 (8.cd5 Nd5 9.Nc3 Nb4=+) 8...dc4 9.a4 (9.Bc4 Nbd7=+) 9...Bd3 10.Ne5 (10.Na3 Be2 11.Qe2 a6=) 10...a6 (10...Ne4 11.Na3 Bf6 12.Bd3 cd3 13.0-0-/+) 11.Nc3 ab5 12.ab5 Ra1 13.Ba1 Nbd7 (13...Ne8 14.Nc4 Bh4 15.g3=) 14.Nd3 cd3 15.Bd3 Nb6 16.Be2 c4 (16...Qd7 17.Na4 Na4 18.Qa4=+) 17.0-0 Qc7 (17...Qd7 18.Qc2=+) 18.Na4= Rd8? (better 18...Rc8=) 19.Be5+- Bd6 20.Nb6 Qb6 21.Bc4 (21.Bf6 gf6 22.Bc4 f5+-) 21...Be5 22.fe5 Nd5 (22...Qc7 23.ef6 Qc4 24.b6+-) 23.Qf3+- Qc5?? (better 23...Qc7+-) 24.Qf7 (24.Qf7 Kh8 25.Bd5 ed5 26.e6+-) 1–0. Leonco – Niklos, internet corr, 2018.

5.b5 Be7 6.a4 0-0 7.Nf3 h6 8.Nc3 c5=+ 9.Bd3 Ne4 (9...Bd3 10.cd3 Nbd7 11.0-0=+) 10.0-0= Nc3 11.Bc3 Bd3 12.cd3 Nd7 13.a5 Bf6 14.Qc2 Bc3 15.Qc3 Qf6 16.Qf6 Nf6 17.Ne5 Rfd8 18.Rfc1 Rac8 19.a6 b6 20.Nc6 Rd7 (20...Rc6 21.bc6 Rc8 22.Rab1+=) 21.d4 c4 22.d3 cd3 23.Ne7 Re7 24.Rc8 Kh7 25.Rd1 Ne4 26.Rd3 Kg6 27.Rc6 Nf6 (27...Rd7 28.g4+-) 28.g4! Ng4 29.Rdc3 Nf6 30.Rc7 Rc7 (30...Ne4 31.Re7 Nc3 32.Ra7 Nb5 33.Rb7+-) 31.Rc7 (31.Rc7 Ne8 32.Ra7+-) 1-0. marekt (2160) - pawncrusher63 (1775), gameknot.com, 2019.

5.Nf3 Bb4 6.c3 Bd6 7.Be2 a6 8.0-0 0-0 9.Nh4 Ne4 10.Nf5 ef5 11.c4 dc4 12.Bc4 Bb4 13.Qh5 Nd6 (13...Nd2 14.Nd2 Bd2 15.Rf3+-) 14.Bd3 g6 15.Rf3 f6 (15...gh5?? 16.Rg3 Qg5 17.Rg5) 16.Rg3 Qd7 17.Nc3 Bc3 18.Bc3 Ne4 (18...Nc6 19.Rb1=+) 19.Be4= fe4 20.f5 g5?? (better 20...Qd5 21.Rf1 Nd7+/- (21...Qa2 22.fg6 h6 23.Qh6 Rf7 24.g7 Rd7 25.Qh8 Kf7 26.g8Q Ke7 27.Qf6)) 21.Bf6!+- Rf6 (21...Rf6 22.Qg5 Pinning) 22.Qg5 Kf7 (22...Rg6 23.fg6 h6 24.Qf6+-) 23.Qg7 Ke8 24.Qf6 Qf7 25.Qe5 Qe7 26.Rg8 Kd7 27.Rg7 (27.Rg7 Qg7 28.Qg7 Kc8 29.Qg8 Kd7 30.Qh7 Kd6 31.Qh6 Kd7 32.Qe6 Kd8 33.f6+-) 1-0. marekt (2130) - eldeniz315 (1865), gameknot.com, 2020.

5.a3 -/+.

5.Be2 Bb4 6.g4 Bg4 (6...Be4!? 7.f3 Ng4 8.fe4 Ne3+=) 7.Bg4+/– Nbd7 8.a3 Bd6 9.Be2 Be5 10.Nc3 d4 11.Na4 de3 12.de3 Qe7 13.Qc1 Bd6 14.Nf3 Rg8 15.Nd4 Ne5 16.Nb5 a6 17.Nd6 Qd6 18.c4 Qc6 19.Rg1 Nf3 20.Bf3 Qf3 21.Bf6 (21.Qd1 Qd1 22.Rd1 Nh5+-) 21...Qf6+/– 22.Rg4 0-0-0 23.Rb1 Qf3 24.Rf4 Qc6 25.c5 g5 26.Rfb4 (26.hg5 e5 27.Rh4 Qf3 28.Nb6 cb6 29.cb6 Kb8 30.Qc7 Ka8=) 26...gh4 (26...g4!? 27.e4 a5=) 27.Ke2+= Qd5 28.Rh4 (better is 28.Qc2!? Qh5 29.Kf1+=) 28...Qd3= 29.Kf3 Qd5 (29...Rd5 30.Rbb4=) 30.Ke2 Rg2 (better is 30...Qd3!? 31.Kf3 Rd5=) 31.Qc2 (31.Rh7 Qd3 32.Kf3 Qf5 33.Kg2 Rg8 34.Rg7 Rg7 35.Kf1 Qd3 36.Ke1 Rg1) 31...Rdg8 32.Nb6?? (better is 32.Qe4 Qe4 33.Re4+/–) 32...cb6-/+ 33.cb6 Kb8 34.Qc7 Ka8 35.Qf7?? (better is 35.Rf1 Qa2 36.Kf3-/+) 35...Qa2-+ 36.Kf3 (36.Kd3 Qb1 37.Kc3 Qc1 38.Kb3-+) 36...Rf2 0–1. mikebaldini (1615) – shaughan, gameknot.com, 2015.

5.Be2 h5 6.a3 Nbd7 7.Nf3 Be7 8.c4 c6 (8...dc4 9.Bc4 0-0 10.0-0+=) 9.b5 (9.c5 0-0=) 9...dc4+= 10.Bc4 cb5 11.Bb5 0-0 12.Nc3 a6 13.Ba4 Nc5 14.Bc2 Bc2 15.Qc2 Qd3 16.Kd1 (better is 16.Rc1!?-/+) 16...Ng4-+ 17.Qd3 Nd3 18.Kc2 Nb2 (18...Ngf2 19.Rhb1-+) 19.Kb2-/+ Nf2 20.Rhf1 Nd3 21.Ka2 (21.Kc2 Rfd8-+) 21...Rac8 22.Nd4 Bf6 23.Nde2 Rfd8 24.Rab1 b5 25.Ne4 Bh4 26.Rb3 (26.Rh1 g5 27.g3 f5-+) 26...Nc5 27.N2c3 (27.Nc5 Rd2 28.Rb2 Rb2 29.Kb2 Rc5 30.Rf3-+) 27...Nb3 28.Kb3 f5 29.Nf2 (29.Rh1 Be7 30.d4 fe4 31.Rh5 Ba3 32.Ne4 Be7-+) 29...Rd2 30.Nh3 (30.Ncd1 Rcc2 31.g4 Bf6-+) 30...Rd3 31.Kb4 (31.Rc1 Bf6 32.Nf4 Rdc3 33.Rc3 Rc3 34.Ka2 Re3 35.g3-+) 31...Rdc3 32.Nf4 (32.Rd1 Be7 33.Ka5 R8c6 34.Rd3 Rd3 35.a4 Bd8 36.Kb4 Rc4) 32...Bd8 33.Ne6 R8c4 0–1. mikebaldini (1710) – s1lence (2215), gameknot.com, 2014.

5.a3 Bd6 6.Be2 (better is 6.g4!? Bh7 7.Bg7+-) 6...Nf6+= 7.c4 dc4 8.Bc4 Nbd7 9.Nc3 c6 10.Nf3 b5 11.Be2 a5 (11...e5 12.d4 e4 13.Nd2=) 12.ba5 (12.Nd4 Nb8=) 12...Ra5 13.Nd4 Qa8 14.Bf3 Ne5 15.Nf5 ef5 16.0-0 Nf3 17.Qf3 g6 (better is 17...0-0=) 18.Nb5!+/– cb5 (18...Rb5 19.Bf6 Discovered attack; 18...cb5 19.Qa8 Double attack (19.Bf6 Discovered attack)) 19.Qa8 Ra8 20.Bf6 0-0 21.Bb2 Rfc8 22.Bc1 (better is 22.Rfb1!?+/–) 22...b4+= 23.a4 b3 24.Ba3? (better is 24.Bb2!? Rc2 25.Bc3=) 24...Ra4-/+ 25.Bd6?? (better is 25.Bb2 Rh4 26.Rfc1-/+) 25...Ra1-+ 26.Ra1 b2 27.Rf1 (27.Be5 ba1R 28.Ba1 Rc1 29.Kh2 Ra1 30.Kg3-+) 27...Rc1 28.Ba3 (28.d4 Rf1 29.Kf1 b1Q 30.Ke2 Qb5 31.Ke1 Qa5 32.Kd1 Qd5-+) 28...Rf1 29.Kf1 b1Q 30.Ke2 Qb5 (better is 30...Qa2 31.Be7 Qe6 32.Bd8-+) 31.Ke1 Kh7 (31...Qb8!? 32.f4-+) 32.g3 g5 33.Be7 (33.hg5 hg5 34.Bd6 Qd3-+) 33...Kg6 (33...f4!? 34.Kd1-+) 34.hg5 hg5 35.Ba3 (35.Bd6 Qd3 36.Bf8 f4 37.gf4 gf4 38.ef4 Qe4 39.Kf1 Qf4-+) 35...Kh5 (better is 35...f4!? 36.ef4 gf4 37.gf4 Qb1 38.Ke2 Qe4 39.Kf1 Qd3 40.Ke1 Qa3 41.Ke2-+) 36.f3 g4 37.Bd6 (37.f4-+) 37...gf3 38.Kf2 (38.g4 Kg4 39.d3 Qd3 40.Kf2 Qe2 41.Kg1 Qg2) 38...Qe2 0–1. mikebaldini (1685) – boggem (1625), gameknot.com, 2014.

5.a3 Nf6 6.Be2 Be7 7.c4 dc4 8.Bc4 0-0 9.Nf3 Bg4 10.Be2 c6 11.Ne5 Be2 12.Qe2 Nbd7 13.f4 Ne5 14.Be5 Nd7 15.g3 Ne5 16.fe5 a5 17.b5 Qd5 18.0-0? (better is 18.Rh3-/+) 18...Qe5-+ (18...cb5?! 19.d4-+) 19.Nc3 Qg3 20.Qg2 Qg2 21.Kg2 cb5 22.Nb5 Bh4 23.Rf3 (23.Rac1 Rad8 24.d4 Rd7-+) 23...Rfd8 24.d4 Rac8 25.Kh3 Bg5 26.Raf1 f5 27.Rb1 Rd7 28.Na7 (28.Kg2-+) 28...Rc3 29.Nb5 Re3 30.Re3 Be3 31.Re1 f4 32.Kg4 Kf7 33.Kf3 (33.Rh1 Rd5 34.a4 Kg6-+) 33...h5 0–1. mikebaldini (1655) – juanitovc (1770), gameknot.com, 2015.

5.b5 Nf6 6.Be2 Bd6 7.Nf3 0-0 8.Nd4 Bh7 9.f4 c6 10.g4 Be4 11.Rh2 c5 12.Nf3 (better is 12.Nb3!? c4 13.Nc1+=) 12...Ng4-+ 13.Rg2 Nf6 14.d3 Bh7 15.Kd2 Nbd7 16.Qg1 g6 17.Qh1 (17.Ne5 d4! 18.ed4 Qa5 19.Bc3 Qb5=) 17...h5 (17...d4 18.Kc1 Nd5 19.ed4 Nf4 20.Rf2-+) 18.Nc3 (18.Ne5 d4! 19.ed4 Nd5 20.dc5 Bc5-/+) 18...a6 (18...d4 19.ed4 Bf4 20.Kd1-+) 19.Rag1? (19.ba6 Ra6 20.Ke1 b5-/+) 19...Ng4 (19...d4 20.ed4 Bf4 21.Ke1 ab5 22.dc5-+) 20.Ng5 (20.ba6 d4 21.ab7 dc3 22.Bc3 Ra2-+) 20...Ndf6 (20...Ne3 21.Ke3 d4 22.Kf3 dc3 23.Bc3 ab5 24.Ne4-+) 21.a4? (21.ba6 d4 22.ab7 dc3 23.Bc3 Ra2 24.Bg4 Ng4 25.Rg4+=) 21...d4 22.Nce4 de3 (better is 22...Ne3!? 23.Nf6 Qf6 24.Ne4-+) 23.Kc1 Ne4 (23...Bf4 24.Rg4 Ng4 25.Rg4 hg4 26.Nf6 Kg7 27.Nfh7 e5 28.Nf8 Kf8 29.Qb7 Bg5 30.hg5 ab5 31.ab5+=) 24.Bg4?? (better is 24.Ne4 Nf2 25.Nf2 ef2 26.Rf2-/+) 24...Nf2 (24...hg4 25.Ne4 f5 26.h5 fe4 27.hg6 Bg6 28.Rg4+-) 25.Rf2 (25.Ne6 Qa5 (worse is 25...Nh1 26.Nd8 Rfd8 27.Bf3 ab5 28.ab5-+; 25...hg4?! 26.Nd8 Nh1 27.Nb7-+; 25...fe6 26.Be6 Rf7 27.Rg6 Bg6 28.Rg6 Kf8 29.Qg1-/+) 26.Rf2 ef2-+ (26...hg4?! 27.Re2 fe6 28.h5-/+)) 25...ef2 (25...hg4?! 26.Re2 Bf4 27.Rg4+=) 26.Rg2 hg4 27.Rg4 (27.Rf2 ab5 28.ab5 Qa5-+) 27...Qa5 28.c3 (28.Kd1 Qb4 29.Bc1 ab5-+) 28...Qa4 29.Qf3 (29.Nh7 Bf4 30.Kb1 Kh7-+) 29...f5 30.Qf2 fg4 31.Ne6 Rf4 32.Qe2 Rf6 (better is 32...Re8 33.c4-+) 33.Ng5 Bf4 (33...Raf8 34.Kd2 Rf2 35.c4 Re2 36.Ke2 Qc2 37.Ke3 Bf4 38.Ke4 Qg2 39.Nf3 Qf3) 34.Kb1 Bg5 (34...ab5 35.Nh7 Kh7 36.Qe7 Kg8 37.Qe1 Be3 38.c4 Rf2 39.Qe2 Re2 40.Ba3 Qb3 41.Bb2 Qb2) 35.hg5 Rd6 36.Qe7 Qd1 37.Bc1 Qd3 38.Kb2 ab5 39.Qb7 (39.Qe8 Re8 40.c4 Re2 41.Bd2 Rd2 42.Kc1 Qf1) 39...Rda6 (39...Qe2 40.Bd2 Rd2 41.Kb1 Qd1) 40.Kb3 (40.Qd5 Qd5 41.Kc2 Qe4 42.Kb3 Qa4 43.Kb2 Qa2) 40...Qb1 41.Bb2 Ra3 0–1. mikebaldini (1715) – mundo20 (1695), gameknot.com, 2013.

5.g4=+ Be4 (5...Bh7 6.Nf3=+) 6.f3 Bg6 (6...Bh7=+) 7.Ne2 (7.h5 Bh7=+) 7...f6 (better is 7...Be7!? 8.Nf4 Bh4 9.Ke2 Bf6-/+) 8.h5= Bf7 (8...Bh7=) 9.f4 (9.a3!?=) 9...Bb4=+ 10.c4 (10.Nd4 Ne7=+) 10...Bd6 (10...dc4 11.Qa4 Nc6 12.Nd4=+) 11.Bg2 (11.cd5 ed5 12.Nbc3 c6=+) 11...c6-/+ (< 11...dc4 12.Bb7 Nd7 13.Ba8 Qa8 14.Rg1+=) 12.cd5 ed5 13.Nbc3 Ne7 14.Ng3 Nd7 15.Nce2 Qc7 16.a4 Nc5 17.Qc2 Rc8 18.Bh3 Be6 19.Nd4 Bd7 20.Ngf5 Nf5 21.gf5 Rd8 22.Rg1 Bc8 23.Ne6=+ Be6 24.fe6 Qe7 25.Qg6 Kf8 26.Ke2 Rg8 27.Qf5 Re8-/+ 28.Rg7!? Qe6?? 29.Rg8+- Qg8 30.Qf6 Qf7 31.Qh6 Ke7 32.Qg5 Kf8 33.h6 Ne6?? 34.Be6 Re6 35.h7 Qh7+= 36.Rg1 Be7 37.Qg4+/– Rd6 38.Be5 Rd8 39.f5 Bc5 40.Bg7 Kf7 41.f6 Bf8?? 42.Qg3 Rd7?? 43.Bf8+- Kf8 44.Qb8 Kf7 45.Rg7 Qg7 46.fg7 Kg7 47.Qa7 1–0. Wyss,Walter (2210) – Ridolfi,Raffaele, Academia Cup op, 1997.

4.b5 b6 5.c4 e6 6.cd5 Bb1 (better 6...Qd5!? 7.Nc3 Qb7+-) 7.Qb1 (7.Rb1 ed5 8.Bd3 Ne7+-) 7...Qd5 8.Bd3 Ne7?? (8...c6 9.Ne2 Ne7+-) 9.Be4 Qg5 (9...Qb5 10.Ba8 Na6 11.Nf3+-) 10.Ba8 c6 (10...Qb5 11.a4 Qd7 12.Nf3+-) 11.Ne2 (11.Nf3 Qb5 12.Qc2 Nd5+-) 11...Qb5 12.Nd4 (12.Nc3 Qf5+-) 12...Qd5 (12...Qc4 13.Qc1 Qc1 14.Rc1+-) 13.0-0 e5 (13...Ng6 14.f4 Bc5 15.Ne6 Qe6 16.f5+-) 14.Nf3 Na6 15.d4 Nc7 (15...e4 16.Nd2 Qd7 17.Ne4+-) 16.Bb7 e4 17.Nd2 Ng6 (17...f5 18.Qc2 Ne6 19.Nc4+-) 18.Rc1 Bc5 (18...Ne7 19.Ba3 Kf7 20.Be7 Be7 21.Bc6+-) 19.Ne4 (better 19.dc5 0-0 20.cb6 ab6 21.Rc6 Rb8 22.Rc7 Rb7 23.Rc8 Kf7 24.Ne4 h6+-) 19...Nh4 20.dc5 b5 21.Bf6! Nf3 (21...gf6 22.Nf6 Double attack) 22.gf3 Qh5 23.Bc6 Kf7 24.Qb3 Kg6 25.Ng3 Qh6 26.Qd3 Kf7 27.Qd7 Kg6 (27...Kf6 28.Qd6 Kf7 29.Qc7 Kg6 30.Qd6 Kf7 31.Qd7 Kf6 32.Ne4 Kg6 33.Qe6 Kh5 34.Qg4) 1–0. GuestQCPJ – GuestRVBW, freechess.org, 2020.

4.Nc3 e5 5.Qf3 Be6 6.b5 Nh6 7.Nge2 (better is 7.Qh5 Bf7 8.Qf3=+) 7...Bd6?? (7...e4 8.Ne4 de4 9.Qe4-/+) 8.Qg3 (better is 8.Nd5 c6 9.bc6 bc6 10.Ndc3+=) 8...0-0 9.f4 e4 (better is 9...Nd7!?-/+) 10.Nd4= Bf7 11.f5?? (better is 11.Be2=) 11...c5 (better is 11...Bg3 12.hg3 c5 13.bc6 Nc6-+) 12.Qf2 cd4 13.ed4 Qd7 14.h3 (14.Be2-+) 14...Nf5 15.0-0-0 a6 16.g4 Ne7 (16...Ng3 17.Rg1 Nf1 18.Qf1 ab5 19.Qb5-+) 17.h4 ab5 18.Bb5 Nbc6 19.a4 (19.h5 Be6-+) 19...Qc7 20.g5 (20.h5 Bg3 21.Qg1 Be6-+) 20...fg5 21.hg5 Bg6 22.d3 (22.Qg1-+) 22...Rf2 23.de4 de4 (better is 23...Nb4!? 24.Kb1 de4 25.Rhf1 Rc2 26.Ka1 Rc3 27.Rd2-+) 24.Bc4 Kh8 25.Bd5 Nb4 26.Be4 Be4 27.Rd2 Rd2 28.Kd2 Nc2 29.g6 Bg6 30.d5 Bb4 31.Rh3 Nd5 32.Ke2 Re8 33.Kf3 Qf4 0–1. revbodio1 – bright, Live Game Caissa's Web, 2004.

4.c4 d4 5.ed4+- Nc6 (5...Nh6!?+-) 6.d5+- Nb4? (better 6...Ne5 7.Nf3 Nf3 8.Qf3 Nh6+-) 7.Qa4 Kf7 (7...Nc6 8.dc6 bc6 9.Nc3+-) 8.Qb4 Nh6 (8...e6 9.de6 (9.Qb7?! Rb8 10.Qa7 Rb2=) 9...Be6 10.Qb3+- (10.Qb7?! Rb8 11.Qa7 Rb2=)) 9.Qb3 Qd6 (9...e6 10.Nf3 a5 A) 11.Qb7?! Rb8 12.de6 Be6 13.Bf6 gf6+= (13...Rb7?? 14.Bd8 Bf5 15.Nc3+-; worse 13...Kf6 14.Qa7+-); B) 11.Nc3+-) 10.Nc3 (10.Qb7?! Qd8 11.Bc3 Rb8 12.Qa7 Bb1+-) 10...a6 (10...e6 11.Be2 Re8 12.Qb7+-) 11.Nge2 Ng4 (11...e5 12.Ng3 (worse 12.Qb7 Be7 13.Qc6 Qc6 14.dc6 Rab8+-) 12...Qb4 13.Nce4+-) 12.h3 Ne5 13.Nd4 c5 (13...Bd3+-) 14.Nf5 Qd7 (14...Qc7 15.d4 Nd7 16.Ne4+-) 15.Ne3 g6 16.f4 Bh6 17.fe5 fe5 18.Ne4 Be3 19.Qe3 Qf5 20.Be2 Kg7 21.Bg4 (21.Bg4 Qf6 22.Nf6 ef6 23.0-0 Raf8 24.Rf6 h5 25.Qe5 Rf6 26.Qf6 Kh6 27.Bh5 Rg8 28.Bg4 Re8 29.Qh4) 1–0. Pierre – Gargannyi, internet, 2020.

4.c4 Qd6 5.b5 (5.cd5 Qd5 6.Nc3 Qd7+=) 5...dc4 (5...e5 6.cd5 Ne7 7.f3=) 6.Qf3 (6.Bc4 Qb4 7.Qc1 a6 8.ba6 Na6=) 6...Bc8 7.Bc4 (7.Ba3 Qe6+=) 7...Qb4 8.Bb3 (8.Qd5 e6 9.Qd4 Bc5+=) 8...Qb5=+ 9.Nc3 Qb4 (9...Qd7 10.d4=) 10.Nge2 Bg4 (10...Nc6 11.Nf4 Ne5 12.Qh5 Kd8 13.Ncd5+=) 11.Qg3 Na6?? (better 11...c6=) 12.Nd5+- Qe4 13.f3 Bf3 14.gf3 Qd3 (14...Qf5 15.Bc4 Qd7 16.Rc1+-) 15.Nc7 Nc7 16.Qc7 Rd8 (16...Qb5+-) 17.Nd4 Nh6 (17...Qa6 18.Ne6 Ra8 19.Rc1+-) 18.Ba4 Kf7 (18...b5 19.Qc6 Kf7 20.Bb5 Qd4 21.Bd4+-) 19.Bb3 (19.Qd8 Kg8 20.Qe8 Qg6 21.Bb3 e6 22.Be6 Nf7+-) 19...Ke8 20.Ba4 (better 20.Qb7 Qb3 21.ab3 a6+-) 20...Kf7 21.Qd8 Ng4 22.Be8 Kg8 23.Qd5 (23.Qd5 e6 24.Qe6) 1–0. DEFFM – Cengozhan, freechess.org, 2018.

4.d3 e5 5.Be2 (5.a3!?=+) 5...Bb4-/+ 6.c3 Ba5 7.d4 ed4 8.ed4 Nd7 9.Nf3 Ne7 10.0-0 0-0 11.Nbd2 (11.Nh4 Be6-/+) 11...Re8 12.Nb3 Bb6 13.Nh4 Bg6 (13...Be6 14.Re1-/+) 14.Bd3 (14.c4 c6=+) 14...Bd3-/+ 15.Qd3 f5 (better is 15...c5!? 16.Qf3 Qc7-/+) 16.Nf5= Nf5 17.Qf5 Nf6 18.Rae1 Rf8 (18...Qd6 19.Re5=) 19.Qc2 (19.Qe6 Rf7=) 19...Ne4 (19...Qd6 20.c4 Ng4 21.f4=) 20.Re4 (better is 20.c4!? c6 21.Nc5 Nc5 22.dc5=) 20...de4-/+ 21.Qe4 Qf6 (21...c6 22.Qe6 Kh8 23.Ba3-/+) 22.Qb7=+ Rae8 23.c4?? (better is 23.Qd5 Kh8 24.Qb5=+) 23...Re2 24.Qd5-+ Kh8 25.Rb1 Qf2 26.Kh1 Qf1!! (27.Rf1 Rf1) 0–1. rla – milanista, internet, 2007.

4.d4 Nd7 5.Nf3 e5 6.de5 Qe7 7.Qd5 Qb4 8.Bc3 Qb6?? (better is 8...c6 9.Qd1 Qe7+/–) 9.ef6+- Nh6 (9...Be6 10.fg7 Bg7 11.Qe6 (< 11.Bg7 Bd5 12.Bh8 Ngf6=+) 11...Qe6 12.Bg7+-) 10.Nd4 (better is 10.fg7 Rg8 11.gf8N Kf8 12.Nbd2+-) 10...c6 11.Qf3 Bg4 (11...Ne5 12.Qf4 Ng6 13.f7 Kf7 14.Bc4 Ke8+-) 12.Qe4 Kd8 13.h3 (13.fg7 Bg7 14.Ne6 Be6 15.Bg7 Rg8 16.Qh4 Kc8 17.Qh6 Qb4 18.Nd2 Qe7+-) 13...Bh5?? (13...Nf6 14.Ne6 Be6 15.Qe6 Bb4+/–) 14.Ne6 Kc8 15.fg7 Bg6 (15...Bg7 16.Ng7 Bg6+-) 16.Qg6! hg6 17.gh8Q (17...Nf7 18.Qg8+-; 17.gh8N?! Bb4 18.Bd3 Bc3 19.Nc3 Qa5+/–; 17.Nf8?! Rf8 18.gf8R Nf8+/–; 17.gf8B?! Nf8 18.Bc4 Rg8+/–; 17.gf8R?! Nf8 18.Bc4 c5 19.Bh8 Ne6+/–; 17.gf8Q?! Nf8 18.Bc4 Rg8+-; 17.gf8N?! Nf8 18.Bc4 Rg8+-) 1–0. Eisenhauer,Erik – Lahr,Torsten, RH–op Ingelheim, 1998.

4.d4 e5 5.de5 Bb4 6.Nd2 (6.Bc3 Nc6 7.Bb5 Bc3 8.Nc3 a6 9.Bc6 bc6=) 6...Nd7 7.Ngf3 Qe7 8.c3 Bc5 9.Nb3 fe5 10.Qd5 c6 11.Qd1 (11.Qd2 Rd8=) 11...Bd6 12.Nfd2 Nb6 13.e4 Be6 14.a4 Nf6 15.Qc2 Qf7 16.c4 (16.f3 0-0=+) 16…Ng4-/+ (17.Nf3 Nc4 18.Bc4 Bc4-/+) 0–1. Sternik,Ryszard – Kucharkowski,Jens, corr SOK–91–76, 1991.

4.Be2 Nc6 5.Bb5 Qd6 6.a3 0-0-0 7.Bc6 (7.Nf3 e5=) 7...Qc6+= (worse is 7...bc6 8.Bd4 Kb8 9.Bc5+=) 8.d3 Nh6 9.h3 e6 10.Ne2 Rd6 (10...e5!?-/+) 11.Nd4= Qa6 12.Qh5 (12.Nf5 Nf5 13.Nd2=) 12...c5 (better is 12...Bg6!? 13.Qe2 e5+=) 13.bc5 Rd7 14.Qe8 (14.c6 bc6 15.Qe8 Kc7 16.Nf5 (worse is 16.Ne6 Be6 17.Bf6 gf6 18.Qe6 Be7-/+) 16...ef5 17.0-0=) 14...Kc7?? (better is 14...Rd8 15.Qb5 Qb5 16.Nb5 a6 17.Nd6 Bd6 18.cd6 e5=) 15.g4+- (15.Nf5?! Nf5 16.0-0 Rd8=) 15...Bg6 (15...e5 16.Nf5 (16.gf5?! ed4 17.Bd4 Nf5 18.Be5 fe5 19.Qe5 Kd8 20.Qf5 Bc5+=) 16...Rd8 17.Be5 Kc8 18.Qh5 fe5 19.Nh6 Qh6 20.Qe5 Bc5 21.Qc3+-) 16.Ne6 Kc6 (16...Qe6 17.Qe6 Bf7 18.Qd7 Kd7+-) 17.Nd4 (17.Qc8 Kb5 18.a4 Qa4 19.Qd7 Ka6 20.Ra4) 17...Kc7+- 18.Qe6 Qa4? (better is 18...Bc5 19.Qa6 ba6 20.Ne6 Kd6 21.Nc5 Kc5 22.Bd4 Kd6+-) 19.0-0 (better is 19.Nc3 Qa6 20.Ncb5 Kd8 21.c6+-) 19...Bf7+/– 20.Nc3 Qa5 21.Nb3 Be6 22.Na5 b6? 23.cb6 ab6 24.Nb3 d4? 25.Nd4 f5 26.Ne6 Kc8 27.Nf8 Rf8 28.f3 fg4 29.fg4 Re8 30.e4 g5 31.Nd5 Nf7 32.Nf6 Re6 33.Nd7 Kd7 34.Rf7 Kd6 35.Rh7 Re8 36.Rf1 b5 37.Rf6 Kc5 38.Rc7 1–0. nordlicht (2125) – harzer, gameknot.com, 2006.

4.Nf3 Nd7 5.Nd4+= e6 (5...Nh6 6.Nf5 Nf5 7.Qg4+=) 6.Nf5 (6.g4!? Bg6 7.Ne6+/–) 6...ef5+= 7.a3 Qe7 8.Bd3 g6 9.0-0 0-0-0 10.c4 (10.Nc3 Ne5+=) 10...dc4 (10...Ne5!? 11.Be5 fe5 12.cd5 Rd5+=) 11.Bc4+/– Ne5 12.Be2 Qd6 13.d4 Nf7 14.Qb3 Rd7 (14...Nfh6 15.Rc1+/–) 15.Nc3 (15.Bc4 Ngh6 16.Be6 Kb8 17.Bd7 Qd7+-) 15...a6 (15...Kb8 16.Rfc1+-) 16.b5 a5 (16...Ngh6 17.ba6 ba6 18.Qa4+-) 17.Rfc1 (17.Bc4!? Nfh6+-) 17...Ngh6 18.h3 Be7 19.Na4 Kb8?! (19...Ng5+-) 20.Nc5 Rdd8 21.Bf3 Qb6 (21...Ng5 22.Bc6 (worse is 22.Nb7 Nf3 23.gf3 Kb7+=) 22...b6 23.f4+-) 22.Nb7 Rc8 23.Nc5 Bc5 24.Rc5 c6 25.Rac1 Nd8 26.a4 Re8 27.Bc6 Nc6 28.Rc6 Rc6 29.Rc6 Qd8 30.Ba3 Rg8 31.Bd6 Ka8 32.Ra6 Kb7 33.Qd5 (33.Qd5 Kc8 34.Qc6 Qc7 35.Qc7#) 1–0. Kreuzer – Bratzler, VM, 1980.

4.Nf3 Bg4 5.Be2 (5.h3 Bh5=) 5...Bf3 (5...e5 6.a3=) 6.Bf3+= e6 7.c4 (7.a3 Bd6+=) 7...Bb4 8.cd5 ed5 9.Nc3 (9.Qb3!? Nc6 10.Bd5+=) 9...c6= 10.a3 (10.0-0 Ne7=) 10...Bc3 (10...Bd6 11.0-0=+) 11.Bc3= Nd7 (11...Nh6 12.0-0=) 12.d4 (12.Bh5 g6 13.Be2 Qe7=) 12...Qe7 (12...Nh6 13.Rb1 Nb6 14.0-0=) 13.0-0 0-0-0 14.Rb1 f5 15.Qb3 Nb6 16.Ba5 Rd7 17.Bb6+- ab6 18.Qb6 Nf6 19.Qa5 Rg8 20.Qa8 Kc7 21.Qb7 Kd6 22.Qb4 Ke6 23.Qc3 g5 24.Be2 Rc7 25.Qc2 Qa3 26.Bd3 f4 27.ef4 gf4 28.Bf5 Kf7 29.Rb6 Qf3+= 30.g3 h5?? 31.Bh3 c5?? 32.Bg2?? Qg4+/– 33.f3?? Qg5 34.dc5 fg3=+ 35.h3 Qe3-/+ 36.Kh1 d4?? 37.Qf5?? Rg6?? 38.h4?? Re7 39.f4= d3 40.Rd6 d2 41.Bd5 Kg7 42.Bg2 Qe1 43.Qc2 Re2-/+ 44.c6?? Rf2 45.Qd1 Rf1 (46.Bf1 g2 47.Kh2 g1Q 48.Kh3 Qeg3#) 0–1. icewater – chesscorner, Live Game Caissa's Web, 2005.

4.Nf3 Bg6 5.c4 e6 6.cd5 ed5 7.Nc3 Ne7 (7...Bb4 8.Qa4 Nc6 9.Ba6 Bc3 10.Bc3=) 8.Be2+= Nf5 9.b5 Bb4 (9...Be7 10.Qb3+=) 10.Qb3 Bc3 11.Bc3 0-0 12.h4 (12.0-0 Re8+=) 12...h5 (12...Re8 13.h5 Bf7 14.Qc2+=) 13.0-0+= Nh6 14.Rac1 c6 (14...Re8 15.d4+-) 15.Nd4 (better 15.bc6 bc6 16.Qb7+-) 15...Kh8?? (better 15...Qd7+-) 16.Ne6+- Qe7 17.Nf8 Qf8 18.bc6 bc6 (18...Nc6 19.Qb7 Ne7+-) 19.Qb7 Qd6 (19...Nd7 20.Qd7 Qe8+-) 20.Qa8 Ng4 (20...Kh7 21.Bd4 a5 22.Ba7+-) 21.Bg4 hg4 22.Rb1! Kh7 (22...Bb1 23.Qb7 Double attack (23.Qb7 Decoy)) 23.Rb8 (23.Rb8 Bf7 24.Rh8 Kg6 25.Qc8+-) 1–0. Adlai – Bcbuub, internet, 2019.

4.Nf3 Nh6 5.Be2 Bg4 6.0-0 e5 7.b5 e4 (7...Qd7 8.a4=) 8.Nd4+= Be2 9.Qe2 c6 10.Qh5 Nf7 11.d3 g6 12.Qe2 Qb6 13.de4 de4 14.Qg4 (better 14.Nc3 f5 15.Qc4+/-) 14...Ne5? (better 14...f5 15.Nf5 gf5 16.Qf5 Rg8=) 15.Qe6+- Be7 16.Nc3 (better 16.Ba3 Qc7 17.Be7 Qe7 18.Qc8 Qd8 19.Qb7+-) 16...Nd3?? (better 16...Nbd7 17.Ne4 cb5 18.Nf6 Nf6 19.Qe5 b4+-) 17.cd3 Nd7 18.Na4 (18.Na4 Qc7 19.Qe4+-; worse 18.Qe4 Nc5 19.Na4 Na4 20.Nc6 bc6 21.Bf6 0-0 22.Be7 Rf7 23.bc6 Nc3+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

4.g4 Be4 5.f3 Bg6 =.

5.Na3 e5 6.Nc4 Nc6 7.Qf3 +=.

5.Na3 Be6 6.Bc4 Bd5?? (6...Bc4 7.Nc4 Qd5 8.d3 Qg2 9.Qf3 Qf3 10.Nf3+=) 7.Bd5 (better is 7.Qh5 g6 8.Qd5 Qd5 9.Bd5+-) 7...Nh6?? (better is 7...Qd5 8.Qf3 e6 9.Qd5 ed5=) 8.Bb7+- Nd7 9.Ba8 Qa8 10.Nf3 e6 11.0-0 (better is 11.Qb3 e5+-) 11...Ng4 (11...Bb4 12.Qb3 Ba3 13.Ba3+-) 12.h3 (better is 12.Nd4!? e5 13.Qg4 ed4 14.Bd4 a5+-) 12...Nh6 13.Nb5 Qb7 14.Qe2 a6 15.Nbd4 Bb4 16.Ne6 Nf5 17.e4 Ne7 18.Rab1 Qa7 19.Bd4 Qb7 20.a3 a5 21.ab4 a4 22.b5 Nf8 23.Rb4 Ne6 24.Ra4 Kf7 25.Rc1 Qc8 26.b6 c6 27.Rb4 Nf4 28.Qc4 Ne6 29.Bc5 Re8 30.Nd4 g5 31.b7 Qb8 32.Ne6 Kg6 33.Be7 Re7 34.Qc6 Kh5 35.g4 Kg6 36.e5! Kf7 37.Qc8 Qe5 38.Rc7 Qe6 39.Qe6 Ke6 40.Re7 Ke7 41.b8Q Ke6 42.Rb5 Kf7 43.Rb6 Kg6 44.Qe8 Kg7 45.Rb7 Kh6 46.Qh5 1–0. 488 – dumbroad, ChessWorld.net, 2013.

5.b5 e5 6.Bc4 Nd7 7.a4 (7.Qf3 Ne7=) 7...a5 (7...Nb6 8.Be2=+) 8.Nf3 Nb6 9.Be2 Ne7 10.0-0 c6 11.d4 ed4 (11...e4 12.Nfd2 Nbd5 13.bc6 Nc6 14.Qb3+=) 12.Nd4+/- Bg6 13.Ne6 (13.Nd2 Nf5+/-) 13...Qd6?? (better 13...Qd1 14.Rd1 Ned5+=) 14.Qd6+- (14.Qd6 Nbd5 15.bc6 bc6 16.e4 Be4 17.Nc3+-) 1-0. BeepBeepImAJeep (2630) - ED1N0R0G (1740), lichess.org, 2017.

5.Bc4 e6 6.a3 Bd6 (6...Nc6 7.d3=) 7.Nf3 Bg4 (7...a5 8.b5 Nh6 9.Nd4+/–) 8.Be2 (8.h3 Bf5+/–) 8...Bf3 (8...Ne7 9.Nd4 Be2 10.Qe2=) 9.Bf3+= c6 10.0-0 Nh6 11.Nc3 f5 12.Ne2 Ng4 (12...0-0!?+=) 13.Bg4 fg4 14.Ng3 (14.Nd4 Qh4 15.g3 Qf6 16.Qg4 Be5+-) 14...h5 15.f4 (15.Bg7!? Rh7 16.Bd4+-) 15...gf3+/– 16.Rf3 h4 17.Nf1 (17.Ne4!? Qc7 18.Nd6 Qd6 19.Bg7+-) 17...h3 18.g3 (18.Bg7? Qg5 19.g3 Qg7-+) 18...Rf8 (18...Qg5 19.d3+=) 19.Rf8+/– Bf8 20.Qh5 Kd7 21.Qf7 Kd6?? (21...Qe7 22.Qf3+=) 22.Bg7 (22.Be5 Kd5 23.Rc1+-) 22...Bg7+/– 23.Qg7 Nd7 24.Qd4 Kc7 25.Qh4 Qh4= 26.gh4 Rg8 27.Kh1 Rg2-/+ 28.Rd1?? Nf6 29.d4?? Ng4 (29...Ng4 30.Rd2 Nf2 31.Rf2 Rf2-+) 0–1. Valpa – Foxcar, playchess.de, 2005.

5.Nc3 e5 6.Qb3 Be6 (6...d4 7.ed4 ed4 8.Nce2=) 7.cd5 cd5 8.Bb5 Nc6 9.e4 (9.Nf3 a6 10.Bc6 bc6=) 9...Nge7=+ 10.Rc1 Qd6 (10...Kf7 11.Nf3=+) 11.Qa4 g6 (11...a6 12.ed5 Bd5 13.Nd5 Qd5 14.Be2-/+) 12.Nf3 (12.Nd5 Bd5 13.ed5 Qd5=) 12...Kf7 (12...d4 13.Ne2=) 13.ed5 Nd5 14.Bc6 (14.a3 Nc3 15.Rc3 Ne7=) 14...bc6=+ 15.a3 Bd7 (15...Nf4!? 16.0-0 Nd3=+) 16.Ne4+= Qe7 17.Qb3 (17.Nc5 Nf4 18.g3 Ng2 19.Ke2 Bg4 20.Qc6 Rd8+/–) 17...Bh6 (17...a5!? 18.0-0 Kg7= (18...ab4 19.Nf6 Ra3 20.Ba3 Qf6 21.Ne5 Qe5 22.Bb2+-)) 18.0-0+= Kg7 19.Rfe1 Nf4?? 20.Nf6!+- Be6 21.Re5 Kf7 22.Rce1 Rhd8 23.Re6! (23…Ne6 24.Ne5 Kf8 25.Nc6+-; < 23.Nh7 Bb3 24.Re7 Kg8 25.Nf6 Kf8+-) 1–0. Diener,Rudolf – Petzold, corr (year?).

5.cd5 Qd5 6.Nc3 Qd6 =.

5.Nf3 e5 6.b5 Bd6 7.Nc3 Ne7 8.d4 Qa5 9.c5 ed4 10.ed4 Bf4 11.g3 Bh6 12.Nh4 (12.Bd3 Bd3 13.Qd3 b6=) 12...Kf7 (12...Qb4 13.Qe2 (worse is 13.Nf5 Nf5 14.Rb1 Nd4-/+) 13...Bg4 14.f3+= (14.Qg4?? Qb2 15.Rd1 Qc3 16.Ke2 f5-+)) 13.Nf5 (13.Qh5!? Bg6 14.Ng6 hg6 15.Qg4=) 13...Nf5= 14.Bh3 Re8 (14...Qb4!? 15.bc6 Nc6 (worse is 15...Qb2 16.cb7 Qb7 17.Bf5+/–) 16.Bf5 Qb2 17.Nd5 Nd4=) 15.Kf1+= Qb4 16.Rb1 (better is 16.bc6!? bc6 17.Bf5 Qb2 18.Na4+=) 16...Nd4+= 17.Kg2 Ne6?? (17...Nb5 18.Nb5 Qb5+/–) 18.Qh5+- Kf8 19.Rhe1 Nd7 20.Be6 (20.Re6?! Nc5 21.Rf6 gf6 22.Qh6 Kg8+-) 20...Re7 21.Bd5! Rae8 (21...cd5 22.Re7 Theme: Double Attack) 22.bc6 bc6 23.Bb3 (better is 23.Re7!? Re7 24.Bc6 Qa5+-) 23...Nc5 24.Re7 Re7 25.Rd1 Nd7 26.Qf5 g6 (26...Ke8 27.Qh7 Nf8 28.Qc2+-) 27.Qh3 (27.Qh3 Ke8 28.Qh6+-) 1–0. Sokolski,Aleksey P – Csaszar, corr W–ch sf, 1959.

5.a3 c6 6.Nf3 Bd6 7.c5 Bc7 8.Be2 Nd7 9.0-0 Ne7 10.h3 0-0 11.d4 Ng6 12.de5 (12.Nc3 Qe7=) 12...fe5=+ (worse 12...Nge5 13.Nd4 Be4 14.Ne6+-) 13.Nbd2 e4 (13...b6 14.cb6 ab6 15.Rc1=+) 14.Nd4= Be5 (14...Qe7 15.Nf5 Rf5 16.Qc2=) 15.N2b3 (better 15.f4 ef3 16.N2f3= (worse 16.Rf3 Nh4-/+; worse 16.Bf3 Qg5 17.Qb3 Bh3-/+)) 15...Qb8?? (15...Qg5 16.Kh1=+) 16.Qd2 (better 16.g4!? Be6 17.Ne6 Bb2 18.Nf8 Qf8 19.Ra2+/-) 16...Nh4 17.Nf5 Rf5 18.Be5 Ne5 19.Nd4 Rf6 20.Qd1 Qc8 (20...Rg6 21.g4-+) 21.f3 (21.Bg4!? Qe8 22.Bh5=+) 21...ef3 22.Nf3 Nhf3 23.Bf3 Nf3 (23...Qe6 24.Be2=+) 24.Rf3=+ Rg6 (24...Rf3 25.Qf3 Qe6 26.Re1=+) 25.Qe2 Qe6 26.Qf2 Re8 27.Rf1 Qe7 (27...Rf6 28.Rf6 Qf6 29.Qf6 gf6 30.Kf2=) 28.Kh1 (better 28.Rf7!? Qd8 29.Rb7+/-) 28...h6 (28...Rf6 29.Rf6 Qf6 30.Qf6 gf6 31.Rf3=+) 29.Rf7 Rf6?? (better 29...Qe3 30.Rb7 a6=) 30.Re7+- (30.Rf6?! Qf6 31.Qf6 gf6 32.Rf6 Re3 33.Rh6 Ra3=+) 30...Re7 31.Qe2 Rfe6 32.Qg4 Re3 (32...Re5 33.Qc8 Kh7 34.Rf3+-) 33.Qc8 Kh7 34.Rf8 (better 34.Qf5 Kg8 35.Qf8 Kh7 36.Rf7 Rf7 37.Qf7 Ra3 38.Qb7+-) 34...d4 (34...R3e6+-) 35.Qf5 (35.Rh8 Kg6 36.Qg4 Kf6 37.Rf8 Rf7 38.Qf4 Kg6 39.Qf7 Kh7 40.Qf5 g6 41.Qf7) 35...g6+- 36.Rf7 (36.Qf6 Rg7 37.Qd8 g5 38.Rh8 Kg6 39.Qd6 Kf5 40.Qd4 Rge7 41.Rh6 Re1 42.Kh2 Rh1 43.Kh1 Re1 44.Kh2 Rh1 45.Kh1 g4 46.g3 gh3 47.Qf4) 36...Rf7 37.Qf7 Kh8 38.Qf6 (38.Qg6 Ra3 39.Qh6 Kg8 40.Qe6 Kg7 41.Qd7 Kg6 42.Qb7 Kf5+-) 38...Kg8 (38...Kh7 39.a4 h5 40.Qd4+-) 39.Qd4 (better 39.Qg6!? Kf8+-) 39...Re7 40.Qd8 (40.Qh4!? Rd7 41.Qh6 Rg7+-) 40...Kf7 41.Kh2 (41.Qh8 h5+-) 41...h5 42.h4 Re8 43.Qc7 Re7 44.Qf4 Kg7 45.a4 Rf7 (45...a6 46.Qd4 Kh6 47.Qf6+-) 46.Qe5 Kh7 47.g3 (47.b5 Kh6+-) 47...Kg8 (47...a6 48.g4! hg4 49.Kg3+-) 48.Qb8 Kg7 49.Qa7 Kf6 50.b5 cb5 51.ab5 Kf5 (51...Re7 52.Qb6 Kf7 53.c6 bc6 54.bc6 Re2 55.Kh3+-) 52.c6 Kg4 53.Qb7! Rf2 (53...Rb7 54.cb7 Passed pawn) 54.Kg1 Kg3 55.Qc7 Rf4 1-0. holeviet (1875) - clan21 (1820), Rated Classical game, lichess.org, 2013.

5.b5 Nd7 6.a4 Nb6 7.cd5 Qd5 (7...Nd5!? 8.Nc3 Nb4=+) 8.a5+= Nd7 9.Nc3 Qf7? (better 9...Qe6+=) 10.Qf3+- Be6 (10...Qb3 11.Bc1 (11.Qf5?! Qb2 12.Qh5 g6+=) 11...Nh6 12.Qb7+-) 11.Qb7 Rd8 12.Qa7 Bd6 (12...Nc5 13.Nf3+-) 13.Ne4 Ne7 14.b6 c5 (14...Nd5+-) 15.Nf6 (15.Nf6 Qf6 16.Qa6=+; better 15.Nd6 Kf8 16.Nf7 Kf7 17.Bb5+-) 1–0. Jan_Ek – D'Arkin, internet, 2020.

5.cd5 Bb4?? 6.Qb3?? (better is 6.Qa4 Qd7 7.Qb4+-) 6...Bd6= 7.d4 Nd7 8.de5 Be5 (8...fe5 9.Nf3= (9.Qb7? Rb8 10.Qa7 Rb2-+)) 9.f3 (9.Be5 fe5 10.Nc3 Rb8=) 9...Bb2 (9...Nc5 10.Qa3 Bb2 11.Qb2=+) 10.Qb2= Ne7 11.e4+= Bg6 12.Nc3 0-0 13.Qb7+/– Rb8 14.Qa6 Rb2 15.Bc4 Re8?? 16.d6+- Kh8 17.de7 Qe7 18.Nge2 Ne5 19.Bb3 Nd3 20.Qd3 Rd8 21.Qe3 Rdd2 22.Qd2 Rd2 23.Kd2 Qd6 24.Ke1 h6 25.Rd1 Qb4 26.Kf2 Kh7 27.Rhe1 c5 28.Kg1 c4 29.Rd4 Qc5 30.Bc4 a5 31.Red1 h5 32.Bb3 h4 33.h3 f5 34.ef5 Bf5 35.Kh2 Bc8 36.Kh1 Qc7 37.Rh4 Kg6 (38.Nf4 Kf5 39.Rd5 Qe5 40.Bc2 Kf6 41.Ne4 Qe4 42.fe4 Kf7 43.Ra5 Ke7+-). toll (1620) – Nostrademous (1655), ICC, 2003.

5.cd5 Qd5 6.Nc3 Qc6 7.Bb5 Qb5 (7...Bb4 8.Qb3 a5 9.a3 Bc3 10.Bc3+-) 8.Nb5 Bc8 (8...Na6 9.Qf3 Bc8+-) 9.Nc7 Kd8 10.Na8 Bb4 11.Qb3 Nc6 12.Qf7 Nge7 13.Qg7 Rg8 14.Qf6 Rg2 15.Be5 Bg4 16.Qf8 (better 16.Kf1 Bh3 17.Nh3 Rg6 18.Bc7 Kd7+-) 16...Kd7 17.Nf3 Bf5 18.Nc7 Rg8 19.Qf7 Be4 20.Qe6 Kd8 21.Bf6 Bf3 22.Qg8 Kd7 23.Be7 Ne7 24.Qc4 Bd6 25.Rc1 Bh1 26.Qe6 Kd8 27.Qd6 Kc8 28.Nb5 Nc6 (28...Bc6 29.Na7) 29.Na7 1–0. DEFFM – GuestVPDK, freechess.org, 2019.

5.cd5 Qd5 6.Nc3 Qd7 7.b5 Bb4 8.Nf3 Ne7 9.Bc4 (9.Qa4 Bc3 10.dc3 Nc8+-) 9...Bc3 10.dc3 (10.Bc3 c6 11.Qb3 cb5 12.Bb5 Nbc6+=) 10...Qd1+= 11.Rd1 Nd7 12.0-0 Bg4 13.Rd2 (13.h3 Bh5=) 13...Bf3 (13...Nb6!? 14.Bb3 Nf5=) 14.gf3+= h5 15.Bf7 (15.Rfd1 Nb6 16.Bd3 Kf7+-) 15...Kf7+= 16.Rd7 Ke6 17.Rc7 b6 (17...a6 18.ba6 Ra6 19.Rb7 Ra2 20.Rd1+=) 18.Rd1 Rhe8 (18...Rad8 19.Rb1+-) 19.Rdd7 (19.Ba3 Nc8+-) 19...a6 (19...Rad8 20.Rd8 Rd8 21.Kf1+- (worse 21.Ra7 Rd1 22.Kg2 Nf5-/+)) 20.Ba3+- Nd5?? (better 20...Nc8+-) 21.Rd6 Kf5 22.Rd5 ab5 23.Bb4 Ra2 (23...Rg8 24.a3 Rac8 25.Rcd7+-) 24.Rg7 Rea8 (24...Raa8 25.Rb5 Rab8 26.Kf1+-) 25.Rd6 (better 25.Be7 Rh8 26.Rd6 Rh6 27.e4 Kf4 28.Bf6 h4 29.Bh4 Kf3 30.Rf7 Ke2 31.Rh6 Ra4 32.Rb6 Re4+-) 25...Re2 (25...e4 26.Rd5 Ke6 27.fe4 R8a7 28.Ra7 Ra7 29.Rh5 Rg7 30.Kf1 Rc7+-) 26.e4 (26.e4 Re4 27.fe4 Ke4 28.Rf6+-) 1–0. DEFFM – ejbelen, freechess.org, 2019.

5.b5 a6 6.Nc3 ab5 7.cb5 e5 (7...Nh6 8.Be2=) 8.Qb3 Be6 9.Nf3 Kf7 10.d4 (better 10.e4!? c6 11.d4+=) 10...e4= 11.Nd2 Nh6 12.h3 (12.Be2!?+=) 12...Nf5 13.g4 Nh4 14.Be2 Ng2 15.Kf1 Nh4 16.f4 (16.f4 f5 17.Rg1=). dale70 (2090) - Rahim3000 (2030), Rated Blitz game, lichess.org, 2015.

5.cd5 Qd5 6.Nc3 Qd7 7.b5 Bc5 8.Nf3 (8.Qh5 Kd8+=) 8...Ne7= 9.Be2 (9.Nh4 0-0=) 9...0-0 (9...a6 10.Qa4=) 10.0-0 (10.d4 Bd6=) 10...c6 (10...Bd3 11.Bd3 Qd3 12.Qb3+=) 11.d4+= Bb6 (11...Bd6 12.Nh4+=) 12.Nh4 Bg6 (12...Rc8 13.Qb3+-) 13.Ng6+- Ng6 14.a4 (14.Qb3 Bc7+-) 14...Ba5 (14...Rc8 15.Qb3+=) 15.Ne4 f5 (15...b6 16.Bc4+-) 16.Nc5 Qc7 1–0. DEFFM – GuestNJWX, freechess.org, 2018.

6.a3 c6 7.Nf3 Bd6 8.Nh4 Bg6 9.Ng6 hg6 10.h3 Ne7 11.Qc2 Nd7 12.d4 Kf7 13.Nd2 Rc8 14.Be2 b5 15.e4 Re8 16.0-0 Qc7 17.Rfe1 de4 18.Qb3 Kf8 19.Ne4 Nb6 20.g3 Ned5 21.Rac1?? (better is 21.Bd3+/–) 21…Re4-+ 0–1. Fournier,Frederic (2010) – Lamerdanslam (1790), echecsemail.com, 2005.

6.a3 Bd6 7.Nf3 c6 8.Nc3 Ne7 9.Nd4 Bd7 10.Qh5 g6 11.Qh6 Kf7 12.Bd3 Qg8 13.Qh4 b6 14.Ne4! Be5 (14...de4 15.Bc4 Double attack) 15.f4 de4 16.Bc4 Ke8 (16...Nd5 17.fe5 Qd8 18.Qe4+-) 17.Bg8 Ng8 (17...Bd4 18.Bd4 Rg8 19.Bf6 Nd5+-) 18.fe5 Kf7 (18...a5 19.ef6 Kf7 20.b5+-) 19.Qe4 Ne7 20.e6 Be6 21.Qe6 Ke8 22.Nf5! gf5 (22...gf5 23.Bf6 Combination) 23.Bf6 Kd8 24.Qe7 (24.Qe7 Kc8 25.Bh8+-) 1–0. aspasio (2790) – macedon (2100), net–chess.com, 2013.

6.a3 Nh6 7.Nf3 Bg4 8.Be2 Bd6 9.Nh4 (9.Nc3 c6=) 9...Qd7 10.h3 (10.Nc3 c6=) 10...Be6 11.Nc3 c6 12.Nf3 a6 (12...0-0 13.0-0=) 13.d4 (13.Na4 Qc7+=) 13...0-0= 14.e4 de4 15.Ne4 Be7 (15...Bd5 16.Nd6 Qd6 17.0-0=) 16.0-0 (16.Nc5 Bc5 17.dc5 Bd5+=) 16...Rd8 (16...b6 17.Qc2=) 17.Qc2 (17.Nc5 Bc5 18.dc5 a5+=) 17...Qe8 (17...b6 18.Rfe1=) 18.Bd3 (18.Nc5 Bc5 19.dc5+/–) 18...Nd7? (18...Bd5!?+=) 19.Rae1 (19.Nc5!? Nc5 20.Bh7 Kh8 21.dc5 Bd5+-) 19...Nf8+/– 20.Nc5 Bc5 21.dc5 Qf7 22.Re3 Re8 23.Nd4 Bd5 24.Rg3 Kh8 25.Ne2 Rad8 26.Nf4 Bb3 27.Qc3 Re5 28.Bb1 Nf5?? 29.Qb3+- Qc7 30.Be5 fe5 31.Bf5 ef4 32.Rd3 Re8 33.Rfd1 Qe5 34.Qf7 f3 35.Rf3 Rb8 36.Re3 Qf6 37.Qf6 gf6 38.Re7 Ng6 39.Bg6 hg6 40.Rdd7 Kg8 41.Rg7 Kf8 42.Rdf7 Ke8 43.Rg8 Kf7 44.Rb8 1–0. Vukovic,Ljubomir (1975) – Momirovic,Milan (2020), Knjaz Milos Jezero Open, Belgrade SCG, 2004.

6.b5 Bc5 (6...c5 7.Nf3=) 7.Nc3 (7.Nf3 Ne7=) 7...c6 (7...Ne7 8.d4 Bd6 9.Be2=) 8.Be2 (8.d4 Bb4=) 8...Nd7 (8...Ne7 9.Nf3=) 9.Nf3 cb5 (9...Ne7 10.0-0=) 10.Nd5+= a6 (10...Ne7 11.Ne7 Qe7 12.Bb5+-) 11.0-0 (11.Nd4 Bd4 12.Bd4 Rc8+-) 11...Ne7 12.Qb3 Nb6 (12...Bd6 13.d4+=) 13.Ne7+- Qe7 14.Nd4 (14.d4 Bb4 15.a3 Ba5+=) 14...Bd7 (14...Be4 15.Rfc1 Bd5 16.Nf5+-) 15.Rac1 (15.d3 Na4+=) 15...Na4 (15...Rc8+=) 16.Qd5 (better 16.Ba1+-) 16...0-0-0?? (better 16...Bd6 17.Ba1 Qe5 18.Qe5 fe5+-) 17.Ba3+- Bc6 (17...Qe5 18.Qe5 fe5 19.Bc5 ed4 20.Bd6 Bc6 21.Bg4 Rd7+-) 18.Nc6 bc6 19.Qc6 (19.Bc5?! Rd5 (19...cd5?? 20.Be7 Kb7 21.Bd8 Rd8 22.Rc2+-) 20.Be7 Rd2+-) 19...Kb8 20.Bf3 Qa7 (20...Ka7 21.Rc5 Rc8 22.Rb5 Rc6 23.Be7 ab5 24.Bc6+-) 21.Rc5 Nc5 (21...Rd7 22.Rd5 Rb7 23.Bd6 Ka8+-) 22.Bc5 (22.Qc5?! Qc5 23.Bc5 Rd2+-) 22...Qf7 (22...Rd7 23.Ba7 Ka7 24.Qc5 Kb8 25.Qb6 Kc8 26.Rc1 Rc7 27.Qc7) 23.Qa8 Kc7 24.Qb7 1–0. DEFFM – GuestCFBF, freechess.org, 2018.

6.Nf3 Bb4 7.Qa4 (better 7.Nd4!? Bd7 8.a3+-) 7...Nc6=+ 8.Nd4 Bb1?? (better 8...Nge7=+) 9.Nc6 (better 9.Rb1 Nge7 10.Ba1+-) 9...Qd7?? (better 9...bc6 10.Qc6 Kf7 11.Rb1 Ne7+-) 10.Bb5 (10.Qb4 bc6 11.Qb7 Rc8 12.Rb1 Ne7+-) 10...a6 (10...Bd3 11.Bd3 (11.Qb4?! Bb5 12.Qb5 Qc6=+; worse 11.Nb4 Bb5 12.Qa3 Qg4-/+) 11...Bd2 12.Kd2+-) 11.Rb1 (11.Nb4?! Qb5 12.Qb5 ab5 13.Rb1 Ne7+-; 11.Qb4 ab5 12.Qb5 bc6=+) 11...Bd6 12.Nd4 c6 13.Nc6! Nh6?? (13...bc6 14.Bc6 Double attack) 14.Nd4 ab5 15.Qa8 Qd8 16.Qd8 (better 16.Qb7 Qd7 17.Qa8 Qd8 18.Qd5 Qd7+-) 16...Kd8 17.Nb5 (17.Nb5 Nf7 18.Bd4+-) 1–0. GuestRLKP – GuestKSHW, freechess.org, 2019.

6.Nf3 c6 7.b5 c5 8.Be2 Nd7 9.0-0 Bd6 10.a4 (10.Nh4 Be6+=) 10...Ne7= 11.Qb3 (11.Nc3 Qa5=) 11...c4 12.Qd1 Rc8 (12...Nc5 13.Nd4=) 13.Nd4 Be5 14.f4 Bd4 15.Bd4 b6 (15...Nc5 16.Bh5 Kf8 17.Ra3=) 16.a5 (16.Bh5 Ng6+=) 16...0-0= 17.Nc3 Nc5 18.ab6 ab6 19.Ra7 Rc7 20.Rc7 Qc7 21.Qa1 (21.Bg4!? Bd3 22.Be2=) 21...Nb3-/+ 22.Qb2 Nd4 23.ed4 Re8 (23...Qd6 24.g4 Bd7 25.f5-/+) 24.Bf3 Be6 (24...Qd6 25.Re1 Kf8 26.Qa1 Qf4 27.Nd5 Nd5 28.Re8 Ke8 29.Bd5 Qd2 30.Bc4-/+) 25.Re1= Bf7 (25...Qd6 26.d3=) 26.Qa3 (26.Nd5 Qd8 27.Ne3 Nd5+=) 26...Kf8 (26...Qd7!?=+) 27.Bd5 Qf4 28.Bf7 Qd4 (28...Kf7? 29.Re7 Re7 30.Qe7 Ke7 31.Nd5 Kd6 32.Nf4+-) 29.Kh1 Kf7 30.Qa2 Nd5 (30...Nf5!? 31.Re8 Ke8 32.Qa8 Kf7 33.Qd5 Kg6-+) 31.Re8-/+ Ke8?? (better 31...Nc3 32.Qa8 Qd2=+ (worse 32...Nb5 33.Re4 Qd7 34.Rc4+=)) 32.Qa8+- Kf7 (32...Ke7 33.Nd5 Ke6+-) 33.Qd5 (33.Nd5 Qd2 34.Qb7 Kg6 35.Ne7 Kf7 36.Nc6 Kg6 37.Qb6 c3 38.Ne5 Kh5 39.g4 Kh6 40.Nf7 Kg6+=) 33...Qd5 34.Nd5 1-0. carlos78 (2180) - Germain (1980), Rated Blitz game, lichess.org, 2015.

6.Nf3 Ne7+=.

5.b5 Nb4? (better 5...Na5+-) 6.d3+- 1–0. GuestMZWZ – GuestXLDQ, freechess.org, 2020.

5.Nh4 Be4 (5...Nh6 6.Nf5 Nf5 7.Bb5=) 6.d3 (6.b5 Nb4 7.d3+-) 6...g5?? (better is 6...Bg6 7.b5 Nb8+/–) 7.de4+- gh4 8.ed5 Nb4 (8...Nb8 9.Bb5 c6 10.Qh5 Kd7 11.dc6 bc6 12.Bc4+-) 9.Qh5 Kd7 10.Qg4 Kd6 (10...Ke8 11.Qb4 Qc8 12.Qh4+-) 11.Qb4 (11.Qe6 Kc5 12.Bd4) 11...Kd5 (11...Kd7 12.Qb7 Ke8+-) 12.Bc4 Ke4 (12...Kc6 13.Qb5 Kd6 14.Qd5) 13.Be6 (13.Be6 Qd4 14.Qd4#) 1–0. Wall,Bill – Ferguson,Dennis, chess.com, 2008.

5.a3 =+.

5.b5 (--> 1.b4 e5 2.Bb2 f6 3.b5 d5 4.e3 Bf5 5.Nf3).

5.c4 Bb4 6.Qa4 Nc6 7.cd5 ed5 8.Bb5 Qd6=+ 9.Nc3 (9.Bc3 Bc3 10.Nc3 Bd7=+) 9...Bc3 (9...Nge7 10.Nd4-/+) 10.Bc3=+ Nge7 (10...Kf7 11.Bc6 bc6 12.d4=) 11.Rc1 (11.Bb4! Bc2 12.Qa3=) 11...Bd7 (11...0-0 12.0-0-/+) 12.0-0 0-0 13.Qb3 Rab8 14.h3 a6 15.Be2 b5 16.Nd4 Nd4 (16...b4 17.Ba1=+) 17.Bd4= Be6 (17...c6 18.Bc5 Qe6 19.d4=) 18.Bf3 (18.Bc5 Qd7=) 18...Rfd8 19.Rc5 (19.Ba7 Rbc8=+) 19...Nf5 (19...Nc6 20.Rfc1 Rb6 21.Rd5 Bd5 22.Bd5 Qd5 23.Bb6 Qb3 24.ab3 cb6 25.Rc6 Rd2 26.Rb6=+) 20.Rfc1 Nd4 21.ed4 Rd7?? (better 21...Rb7=) 22.Rc6+- Qe7 23.Ra6?? (23.Re1 Kf7 24.Rce6 Qe6 25.Re6 Ke6 26.Bg4 f5 27.Qe3 Kf7 28.Bf5 Re7+-) 23...b4? (23...Rd6 24.Ra7 Rd7 25.Rc5+=) 24.Rac6?? (24.Re1 Rb6 25.Rb6 cb6 26.Bd5 Rd5 27.Qd5 Bd5 28.Re7 Ba2+-) 24...Ra8?? (24...Qf7 25.a3+/-) 25.R1c5?? (better 25.Re1 Ra3 26.Rce6 (worse 26.Ree6 Rb3 27.ab3 Qd8-/+) 26...Qe6 27.Re6 Rb3 28.ab3+-) 25...Ra3 (25...Bf7 26.Qb4 Ra2 27.Rc7 Rc7 28.Qb8 Qf8 29.Qc7 Ra8+/-) 26.Qb4+/- Ra2 27.Qb8 Rd8?? (27...Kf7 28.Rc7 Ra1 29.Kh2 Rb1 30.Rd7 Rb8 31.Re7 Ke7 32.Bd5 Bd5 33.Rd5 Rb4+/-) 28.Qc7 (better 28.Re6 Rb8 29.Re7+-) 28...Qc7+= 29.Rc7 Rd2 (better 29...Kf8!?+=) 30.Re7+- Bf7 (30...Bc8 31.Bd5 Kh8 32.Ra7+-) 31.Rcc7 Rf8?? (better 31...Bg6 32.Bd5 Kf8+-) 32.Rf7! Rf7 (32...Rf7 33.Rc8 Mate attack) 33.Bd5 (33.Bd5 h5 34.Bf7 (worse 34.Rf7 Rd4 35.Be6 Kh7+-) 34...Kh7 35.d5+-; 33.Rc8 Rf8 34.Bd5 Kh8 35.Rf8) 1-0. carlos78 (2160) - Germain (2005), Rated Blitz game, lichess.org, 2015.

5.Nd4 Qd6 6.Nf5+= ef5 7.b5 Qb4 8.Ba3 Qb5?? (better 8...Qh4+/-) 9.Bb5+- c6 10.Bd3 Ba3 11.Na3 Nd7 (11...Ne7 12.c4 g6 13.Qb3+-) 12.Bf5 Nc5 (12...Nf8 13.c4 Rd8 14.cd5 Rd5 15.Bc8+-) 13.Qh5 g6 14.Bg6! hg6 15.Qg6 (15.Qh8 0-0-0+-) 15...Ke7 (15...Kd7+-) 16.Qg7 Ke6 17.Qh8 Na4 18.h4 (better 18.Qh3!? f5 19.e4 Nb6 20.Qf5 Kd6 21.e5 Ke7 22.Qh7 Ke6+-) 18...Nb6 19.Rh3 Ne7 20.Qh7 Rg8 21.e4 d4 22.f4 (22.Rh2 Rg4+-) 22...Rg2 23.f5 Ke5 24.Qe7 Kf4 25.Qd6 Kg4 26.Rd3 Rg1 27.Kf2 Ra1 (27...Kh5 28.Rg1 Nd7 29.Qd7 Kh6 30.Rg6 Kh5 31.Qh7) 28.Qg3 Kh5 29.Qg6 Kh4 30.Rh3! Kh3 (30...Kh3 31.Qg3 Mate attack) 31.Qg3 1-0. DEFFM – GuestWKJC, freechess.org, 2021.

5.a3 Nh6 6.Bg2 c6 7.c3 Nd7 8.Qa4 (8.d3 Qb6=+) 8...Qb6 9.Nf3?? (9.d4 Bd3-/+) 9...Bd6 (better 9...Nc5 10.Qd1 Nd3 11.Kf1 Nb2-+) 10.Nh4 (10.d4 a5-/+) 10...Bd3 (10...Nc5 11.bc5 Qb2 12.Nf5 Nf5 13.cd6 Qa1 14.0-0-+) 11.Bf1 (11.f4 Nc5! 12.Qd1 ef4 13.gf4 Be4 14.Be4 de4-+ (14...Ne4?! 15.c4=)) 11...Be4 (11...Nc5 12.Qd1 Bf1 13.Kf1-+) 12.Bg2 g5 13.Be4 gh4 (better 13...de4!? 14.Ng2 Nc5 15.bc5 Qb2 16.cd6 Nf7-/+ (16...Qa1?! 17.Qb3=)) 14.Bg2 hg3 (14...e4 15.0-0 Nc5 16.Qc2=) 15.hg3= Ng4 (15...Nf7 16.d4=) 16.Bh3 (16.c4 dc4 17.Qc2 0-0-0+/-) 16...f5 (16...Rg8 17.Qc2 e4 18.Bg4 Rg4 19.c4=) 17.Bg4 (17.c4!?+=) 17...fg4=+ 18.Rh4 (18.Qc2 Nf6=+) 18...h5 (18...e4 19.Ke2 (19.Rg4?? Ne5-+) 19...Rf8 20.Rh7-/+) 19.Qc2=+ 0-0-0 20.d4 (20.Qg6 Kc7=) 20...e4 (20...Be7 21.Rh2-/+) 21.Nd2 (21.c4 Be7 22.Rh1 h4 23.cd5 hg3 24.Qe4 cd5 25.Qd5 Qd6=+) 21...Qc7 22.Qa4 (22.Ke2 Rdf8 23.Rah1 Nb6=+) 22...a6 (22...Nb6 23.Qa5 Bg3 24.Rh1-+) 23.Qb3 (better 23.Ke2!?-/+) 23...Bg3!-+ 24.Rh1 (24.fg3 Qg3 Double attack) 24...Bd6 (24...Bh2 25.c4 g3 26.fg3 Qg3 27.Kd1-+) 25.Nf1? (better 25.c4!? dc4 26.Qc4-/+) 25...h4 (25...Nb6 26.Nd2 Rdf8 27.Rc1-+) 26.0-0-0 (26.c4 Nf6-+) 26...Nb6 27.f4 (27.Nd2 Rdf8 28.Rdg1 Qd7-+) 27...gf3 (27...ef3 28.Nd2-+) 28.Rd2 (28.Nd2 h3-+) 28...Nc4 29.Rf2 Rdg8 30.Kb1 Rg1 (better 30...Rg2 31.Qc2 Qg7-+) 31.Rg1= h3 32.Nd2?? (better 32.Qc2+=) 32...h2 (better 32...Bg3 33.Nc4 Bf2-+) 33.Rh1 Ne3 (better 33...Bg3!? 34.Nc4 Bf2-+) 34.c4=+ Ng4 35.Rff1 dc4 (35...Bf4!? 36.Bc1 dc4=+) 36.Nc4+= Qh7?? (better 36...Bf4+=) 37.Nd6+- Kc7 38.Qe6 (38.Nf7 Rf8 39.Ne5 Ne5 40.de5 e3 41.Qc2 Qc2 42.Kc2 a5+-) 38...e3 39.Ne4 (39.Nf5 f2 40.d5 e2 41.Rf2 Nf2 42.Be5 Kd8+-) 39...e2? (39...Nf2 40.d5 Ne4 41.Be5 Kb6 42.Kb2+-) 40.Rc1 (40.Rf3 e1Q 41.Re1 h1Q 42.Rf7 Kb6 43.Rh1 Qh1 44.Ka2 Nh6+-) 40...Nf2? (40...f2 41.Qg4 f1Q 42.Rcf1 ef1Q 43.Rf1+/-) 41.Qd6 (better 41.d5!? Ne4 42.Be5 Nd6 43.Kb2+-) 41...Kc8 42.d5?? (42.Rc6 bc6 43.Qc6 Kb8 44.Qb6 Ka8 45.Qa6 Kb8 46.Qb6 Ka8 47.Qc6 Kb8 48.Qb5 Ka8 49.Qd5 Kb8 50.Qe5 Ka8 51.Qa5 Kb8 52.Qb6 Ka8 53.Qc6 Kb8 54.Qd6 Ka8 55.Qc6=) 42...Ne4?? (42...Qe4 43.Ka1 Rh6 (43...Nh1?? 44.Be5 Qe5 45.Qe5+-) 44.Qh6 Nh1 45.Qh3 Kd8 46.Bf6 Kc7 47.dc6 bc6 48.Qh2 Kd7 49.Qh1 Ke6+-) 43.Qe6+- Kb8 44.dc6?? (44.Be5 Ka8 45.Rh2 Qh2 46.dc6+=) 44...Nc5 45.Ka2 Ne6 46.Bh8 (46.Be5 Kc8 47.Bh8 Qh8-+) 46...Qh8 47.c7 Kc8 48.Rb1 Qc3 49.Rh2 e1Q (49...Qc2 50.Ka1 Nd4 51.Rh8 Kc7 52.Rh7 Qh7 53.Rg1 Qc2 54.Rg7 Kb8 55.Rg8 Ka7 56.Ra8 Ka8 57.b5 e1Q) 50.Re1 Qe1 51.Rh8 Kc7 52.Rh7 Kd6 53.Rb7 Qd2 54.Kb3 Qd5 55.Ka4 Qb7 56.Kb3 Nd4 (56...Qc6 57.a4 Nd4 58.Ka3 Qc2 59.b5 Qb3) 57.Ka4 (57.Kc3 Qe4 58.Kc4 f2 59.Kc3 Qe3 60.Kb2 Qd2 61.Kb1 f1Q) 57...f2 (57...Qb5) 58.Ka5 (58.b5 Qb5) 58…Qb5 0-1. felixrbran - wiles (1695), Rated Correspondence game, lichess.org, 2013.

5.Bg2 Bb4 6.Nc3 Bc3 (6...c6 7.f4-/+) 7.Bc3 c6 8.Bb2 (8.Ne2 Ne7-/+) 8...Na6 9.c3 (9.Ne2!?-/+) 9...Nc5-+ 10.d4?? (better 10.Bf1-+) 10...Nd3 11.Kf1 Nb2 12.Qb3 Nc4 (better 12...Qb6-+) 13.Ne2 (13.Qb7 Ne7 14.Bf3-+) 13...Nd2 14.Kg1 Nb3 (14...Nb3 15.ab3 Qb6-+) 0-1. felixrbran - wiles (1795), Rated Correspondence game, lichess.org, 2013.

5.Qh5 Bg6-/+ 6.Qe2 Bb4 (6...Be4!? 7.f3 Bc2-/+) 7.Qb5=+ Nc6 8.Bg2 (better 8.Qb7!? Nge7 9.Bb5-/+) 8...Nge7-+ (8...Bc2 9.a3 Ba5 10.Nc3-+) 9.c3 Bd6 (better 9...a6 10.Qe2 Bd6-+) 10.c4? (10.Bd5 a6 11.Bc6 Nc6-/+) 10...dc4 (10...a6!? 11.Qb3 Nb4 12.Na3 dc4 13.Nc4-+) 11.Qc4 (11.Nc3 0-0 12.Qc4 Bf7-+) 11...Qd7 (11...Nb4 12.Be4-+) 12.Nc3 a6 (12...Nb4 13.Be4-+) 13.Nd5 (13.Nge2 Bf7 14.Qa4 0-0-+) 13...Nd5 (13...Bf7 14.e4-+) 14.Bd5? (better 14.Qd5 Nb4 15.Qb7-+) 14...0-0-0 (better 14...Nb4 15.e4 Qb5 16.Qb5 ab5-+) 15.Rb1?? (better 15.Be6 Nb4 16.Bd7 Rd7 17.e4+-) 15...Bb4 (better 15...Na5 16.Qc1 Bb4 17.Be5 Bb1 18.Bc7 Nc4 19.Qb1 Qd5 20.Bd8 Bd2 21.Kf1 Be3-+) 16.Be6 (16.e4 Bd2! 17.Kd2 Ne7-+) 16...Bd2 (16...Bb1?! 17.Bc3 Bd3 18.Bd7 Rd7 19.Qb3-/+) 17.Kf1 (17.Kd1 Bb1 18.Nf3 Be3 19.Ke1 Bb6-+) 17...Bd3! (17...Bb1?! 18.Kg2-+) 18.Qd3 Qe6 19.Qe2 (19.Qc2 Nb4 (worse 19...Qa2 20.Kg2-+) 20.Qe4 Qd5 21.Qd5 Rd5-+) 19...Qd5 (better 19...Qa2 20.Qd1 Be3 21.Qg4 Kb8-+) 20.Nf3 Qa2 21.Kg2 g5 (better 21...Bb4!?-+) 22.Nd2-/+ Qd5 23.Nf3 g4 24.e4 gf3 25.Qf3 Qd2 26.Qf6 (better 26.h3-/+) 26...Nd4?? (better 26...Rhf8 27.Qe6 Kb8-+) 27.Rhd1 (27.Rhc1 Rhe8 28.Rc7 Kc7 29.Qf7 Kc6 30.Qc4 Kd7+-) 27...Qc2= 28.Qe5 (better 28.Bd4 ed4 29.Qe6 Kb8 30.Qa6 Qe4 31.f3 Qc2 32.Kh3 Qf5 33.Kg2 Qc2 34.Kh3 Qf5 35.Kg2 Qc2=) 28...Ne2?? (better 28...Rhe8 29.Qf4 Qe4 30.Qe4 Re4-+) 29.Qf5 (better 29.Rdc1 Nc1 30.Rc1 Qc1 31.Bc1+-) 29...Kb8 30.Bh8 Rd1 31.Qf8 Ka7 32.Rb2?? (better 32.Rd1 Qd1 33.Qc5 Kb8 34.Be5+-) 32...Qe4-+ 33.Kh3?? (33.f3!? Qe3 34.Rc2-+) 33...Qe6 (33...Ng1) 34.Kg2?? (34.Kh4 Rd5 35.g4-+) 34...Rg1 (better 34...Ng1 35.Bd4 b6 36.Bb6 cb6 37.Qg7 Rd7 38.Qd7 Qd7 39.Kg1 a5-+) 35.Kf3-/+ Re1 36.Bc3?? (36.Qc5 b6 37.Qc7 Ka8 38.Kg2-/+) 36...Qd5 (36...Ng1 37.Kg2 Qh3 38.Kh1 Nf3 39.Be1 Qh2) 37.Kg4-+ Qc4 (better 37...h5 38.Kh4 Rh1 39.Rb7 Kb7-+) 38.Kf3 (38.f4 Qc3 39.Ra2-+) 38...Qc3 (38...Ng1 39.Kg2 Qf1 40.Kh1 Nf3) 39.Kg2 0-1. felixrbran - wiles (1705), Rated Correspondence game, lichess.org, 2013.

4.b5 c6 5.a4 (5.Nc3 a6 6.a4 Nf6+=) 5...Qc8 (5...Nf6 6.Be2=) 6.Nf3 (6.Nc3+=) 6...Qe6 (6...Nf6!?+=) 7.Be2 Bf5 (better 7...Nf6!?+-) 8.Nd4 Qe4? (8...Qg6 9.Nf5 Qf5 10.Bg4+-) 9.Nf5 (better 9.0-0!? Bc8 10.Nc3+-) 9...Qf5 10.Bg4 (10.Nc3 Nf6 11.0-0 e6+-) 10...Qg6 11.0-0 (better 11.Bc8 a6 12.0-0+-) 11...f5?? (better 11...Nd7+-) 12.Bh5+- Qh5 (12...Nd7 13.Bg6 hg6 14.Qe2+-) 13.Qh5 g6 14.Qh4 Nf6 15.Bf6 ef6 16.Qf6 Rg8 1–0. GuestZQRW – GuestNLNZ, freechess.org, 2020.

4.b5 Nf6 5.c4=.

4.c4 e6 5.a4 (5.Nf3 Nf6= (5...Bb4?? 6.Bg7 dc4 7.Bh8+-)) 5...c6 (5...Na6 6.b5 Nb4 7.Na3=+) 6.b5 Nf6 7.Nf3 Be7 8.Be2 0-0 9.0-0 a6 10.d4 ab5 11.ab5 Ra1 12.Ba1 dc4 13.Bc4 (13.Nc3 cb5 14.Nb5 Qd5=) 13...cb5=+ 14.Bb5 Nbd7 (14...Qa5 15.Nc3=+) 15.Be2 Qa5 16.Nbd2 (16.Bc3 Qa2 17.Bd2 Ra8=) 16...Ra8 17.Nc4 Qa7 (17...Qa4 18.Nce5 Qd1 19.Rd1=+ (19.Bd1?? Ra1 20.Ng6 hg6-+)) 18.Nce5 b5 (better 18...Ne5!? 19.Ne5 Be4=) 19.Bb5 (19.Ng6 hg6 20.Bb5 Qa5+/-) 19...Ne5 20.Ne5 Nd5 (20...Be4 21.Bc6 Bc6 22.Nc6+/-) 21.Nc6 (21.Ng6 hg6 22.e4 Nb4+/-) 21...Qb6 22.Ne7 Ne7 23.Be2 Nd5 24.Bf3 Rd8 25.Qc1 Nf6 26.Qc6 Qb8 27.Qb7 h6 28.Qb8 Rb8 29.Bc3 Rd8 30.Ba5 Rc8 31.Bb6 Rb8 32.Bc7 Rc8 33.Be5 Nd7 (33...Ne4 34.g4+/-) 34.Bg3 Nf6 35.h3 Nh5 (35...Be4 36.Ra1+/-) 36.Bh2 (36.Be5!? Rc2+-) 36...Nf6+/- 37.Rd1 Ne4 38.Be5 Nc3 (38...Ra8 39.Rc1+/-) 39.Rd2 (39.Ra1 Be4+/-) 39...Nb1 (39...f6!? 40.Bb7 Rc4+/-) 40.Rb2+- Nc3 41.Kh2 Ne4 42.Bf4 Ng5 (42...Nf6 43.Be2+-) 43.Bg4 (43.Bg5!? hg5 44.Rb5 f6+-) 43...Ne4 44.Bf3 Nf6 (44...Ng5 45.Bg5 hg5 46.Rb5+-) 45.Be5 Ne4 46.Rb7 (46.g4 f6 47.Bf4 Re8+-) 46...Nd2 (46...Nf2!? 47.Bg3 Ne4+=) 47.Be2+/- Nc4 (47...Rc2 48.Rc7+/-) 48.Bf4 Nd2 49.h4 Ne4 50.f3 Nf6 (50...Nc3!? 51.Ba6 Nd5+-) 51.e4+- Bh5 52.Be5 (better 52.Bb5!?+-) 52...Ne4 53.g4 (53.Ba6 Ra8 54.Bd3 Nc3+/-) 53...Nc3 (better 53...Rc2!? 54.fe4 Bg4=) 54.Ba6 Bg6 (54...f6!? 55.Ra7 Rc6 56.Ra8 Kf7 57.gh5 fe5 58.de5 Rc5+/-) 55.Rf7! Bf7 (55...Bf7 56.Bc8 Discovered attack; 55...Kf7 56.Bc8 Discovered attack) 56.Bc8 Nd5 57.Bb7 Be8 58.Bd5 (better 58.f4+-) 58...Bf7?? (better 58...ed5 59.h5 g6 60.hg6 Bg6+/-) 59.Be4 g5 (59...g6 60.Bc6+-) 60.Kg3 gh4 61.Kh4 Bg6 (61...Kf8+-) 62.Bg6 h5 (62...Kf8 63.f4 Ke7 64.f5 ef5 65.gf5 h5 66.f6 Kd7 67.f7 Ke7 68.Bg3 Kd8 69.f8Q Kd7 70.Qe8) 63.Bh5 (63.gh5 Kf8 64.Bf6 Kg8 65.h6 Kf8 66.h7 e5 67.h8Q) 63...Kh7 (63...Kf8 64.Bd6 Kg7 65.Kg5 Kh7 66.Bg6 Kg7 67.Be5 Kg8 68.Kf6 Kf8 69.d5 Kg8 70.de6 Kf8 71.e7 Kg8 72.e8Q) 64.Bf4 (64.Bf7 Kh6 65.g5 Kh7 66.d5 ed5 67.Kh5 d4 68.g6) 64...Kh8 (64...Kg8 65.Kg5 Kg7 66.Be5 Kf8 67.Kf6 Kg8 68.Bf7 Kh7 69.g5 Kh8 70.Kg6) 65.Be5 Kh7 66.Kg3 (66.Bf7 Kh6 67.g5 Kh7 68.d5 ed5 69.Kh5 d4 70.g6) 66...Kg8 67.f4 (67.g5 Kf8 68.g6 Ke8 69.g7 Kd7 70.g8Q Kc6 71.Qb8 Kd5 72.Qb5) 67...Kh7 (67...Kf8 68.g5 Ke7 69.g6 Kd7 70.g7 Kc6 71.g8Q Kb6 72.Qe6 Kb5 73.Qb3 Ka5 74.Bc7 Ka6 75.Qb6) 68.Kh4 (68.d5 ed5 69.f5 Kg8 70.f6 Kf8 71.Bd6 Kg8 72.f7 Kh7 73.g5 d4 74.f8Q d3 75.g6) 68...Kg8 69.f5 Kh7 (69...ef5 70.gf5 Kh7 71.f6 Kg8 72.f7 Kf8 73.Bd6 Kg7 74.f8Q Kh7 75.Qf7 Kh6 76.Qg6) 70.Kg5 (70.fe6 Kg8 71.e7 Kh7 72.e8Q Kh6 73.Qg6) 70...Kg8 (70...ef5 71.Bg6 Kg8 72.gf5 Kf8 73.f6 Kg8 74.f7 Kf8 75.Bd6 Kg7 76.f8Q) 71.f6 Kh7 (71...Kf8 72.Bd6 Kg8 73.f7 Kg7 74.f8Q Kh7 75.Bg6) 72.Kf4 (72.Bg6 Kg8 73.f7 Kf8 74.Bd6 Kg7 75.f8Q) 72...Kg8 73.g5 (73.f7 Kf8 74.Bd6 Kg7 75.f8Q Kh7 76.Qf7 Kh6 77.g5) 73...Kh7 74.g6 Kg8 (74...Kh6 75.g7 Kh7 76.f7 Kh6 77.g8Q Kh5 78.Qg5) 75.Kg5 (75.f7 Kf8 76.Bd6 Kg7 77.f8Q) 75...Kh8 (75...Kf8 76.g7 Kg8 77.f7 Kh7 78.g8Q) 76.Bg4 (76.f7) 76...Kg8 77.Bh5 (77.Be6 Kf8 78.g7 Ke8 79.g8Q) 77...Kf8?? (better 77...Kh8 78.f7) 78.f7 (78.g7 Kg8 79.f7 Kh7 80.g8Q) 78...Ke7 79.Bg7 (79.g7 Kd7 80.f8Q Kc6 81.Qc5 Kb7 82.Qc7 Ka6 83.Be2) 79...Kd6 (79...Kd7 80.f8Q Kc6 81.Qc5 Kb7 82.Qb5 Kc7 83.Be5 Kd8 84.g7 Ke7 85.Qe8) 80.f8Q Kd5 (80...Kc7 81.Be5 Kb6 82.Qb4 Kc6 83.Bf3 Kd7 84.Qd6 Ke8 85.Bc6) 81.Qf6 (81.Qf6 Kc4 82.Qe6 Kb4 83.Qf5 Kb3 84.Bd1 Kc4 85.Qc5 Kd3 86.Qc2 Ke3 87.Qe2; 81.Qc5 Ke4 82.Qc3 Kd5 83.Be5 Ke4 84.Bf3) 1-0. BeepBeepImAJeep (2590) - zsolti_83 (2465), lichess.org, 2016.

5.d3 Nf6 (5...Bb4 6.Nd2 Nf6 7.Rb1-/+) 6.g4 (6.a3!?=+) 6...Bb4-/+ 7.c3 (7.Nd2 Nbd7-/+) 7...Be7 8.Nf3 0-0 9.h4 (9.Ne5 Nbd7 10.Ng6 fg6-/+) 9...h5 (9...Ng4!? 10.Rg1 h5 11.Be2-+) 10.g5 Ng4 11.Bh3 (11.Be2 e5-+) 11...Bf5 (11...Nd7 12.d4-+) 12.Nbd2 (12.Nd4-/+) 12...e5 (12...Bd3 13.Bg4 hg4 14.Ne5-+) 13.Bg4? (better 13.Ne5 Nd7 14.Ng4 hg4 15.Bf1=+) 13...Bg4-+ (13...hg4?! 14.Ne5 Nd7 15.Nd7 Qd7 16.Qc2=+) 14.Qb3 Nc6 Black prepares the advance d4 (14...Nd7 15.Ba3 Ba3 16.Qa3-+) 15.Nh2 (15.Qb7 Qd7 16.Qa6 Rfb8-+) 15...Be6 (15...Bc8 16.Nhf3-+) 16.Ndf3 (better 16.Qb7!? d4 17.Qc6-/+) 16...Qd6 17.0-0-0 d4 18.c4 (18.Qa4 b5! 19.Qb5 de3 20.fe3 Ba2-+) 18...b5! 19.Qb5 (19.Qb5 Rfb8 Decoy; 19.cb5 Qc5 Double attack (19...Bb3 Pinning; 19...Bb3 Deflection; 19...Qc5 Decoy)) 19...Rab8 (19...Rfb8 20.Qa4-+) 20.Qa4 Rb4 21.Qa6?? (21.Qc2 Rfb8 22.Ba1-+) 21...Rb2 22.Kb2 Qb4 23.Ka1 (23.Kc2 Qc3 24.Kb1 Rb8 25.Qb5 Rb5 26.cb5 Ba2 27.Ka2 Nb4 28.Kb1 Qb3 29.Ka1 Nc2) 23...Qc3-+ 24.Kb1 Rb8 25.Qb5 Rb5 26.cb5 Ba2! 27.Ka2 (27.Ka2 Nb4 Mate attack) 27...Nb4 28.Kb1 Qc2 (28...Qc2 29.Ka1 Qa2; 28...Qb3 29.Ka1 Nc2) 0-1. Mamontmamont (2190) - zsolti_83 (2475), Rated Bullet game, lichess.org, 2018.

5.Ne2 Bb4?? (better 5...Nf6=+) 6.Bg7+- Ne7 7.Bh8 c6 8.Nf4 Qa5 9.Bc3 Bc3 10.Nc3 Nf5 11.h4 d4 12.ed4 Nd4 13.Bd3 (better 13.Ng6 hg6 14.Ne2 Ne2 15.Be2 Nd7+-) 13...Qe5 14.Nfe2 Nd7 (14...Bd3 15.cd3 Na6 16.Rh3+-) 15.h5! Bd3 (15...Bh5 16.Bh7 Pinning (16.Bh7 Deflection)) 16.cd3 0-0-0 17.Kf1 f5 (17...Nc5 18.Rh3+-) 18.Nd4 Qd4 19.Rh3 b5 (19...e5 20.Qf3+-) 20.Rc1 b4 (20...Kb7+-) 21.Nb5 Kb7 (21...Qd5 22.Na7 Kb7 23.Nc6+-) 22.Rc6 (22.Nd4 Nb8 23.Ne6 Rd5+-) 22...Qd3 (22...Qd5 23.Na7! Ne5+-) 23.Rd3 Ne5 24.Rd8 Nc6 25.Qa4 (25.Qa4 Nd8 26.Qa7 Kc6 27.Qa6 Kc5 28.Na7+-; 25.Rd6 Kc8 26.Qc2 Kb8 27.Qc6 b3 28.Rd8) time forfeit. FeegLood (2065) – Alexander5, lichess.org, 2015.

4.b5 Nf6 5.Nf3 Nbd7 6.Be2 e6 7.c4 (7.0-0 Bd6=) 7...Bc5 (7...dc4 8.Bc4 Bd6 9.0-0=) 8.cd5 ed5 9.d4 Bb4 10.Nbd2 Qe7 11.0-0 0-0-0 12.a4 Ne4 13.Nb3 White prepares a5 13...g5 14.a5 g4 15.Ne5 (15.Nfd2!?+=) 15...Ne5= 16.de5 Bc3 (16...Nc3 17.Bc3 Bc3 18.Bg4 Bg4 19.Qg4 Kb8 20.Rac1+=) 17.Bc3 (17.b6 A) 17...Bb2? 18.ba7 Kd7 19.Qd5 Ke8 20.Rad1 Rd5 21.Rd5+-; B) 17...Be5?? 18.ba7 (18.Bg4?! Bg4 19.Qg4 Kb8 20.Be5 Qe5+/-) 18...Bh2 19.Kh2 Qd6 20.Kh1+-; C) 17...ab6 18.Bg4 Bb2 19.Bf5 Kb8 20.ab6 Qe5 21.bc7 Qc7+=) 17...Nc3= 18.Qd2 Ne4 (better 18...Qe5!? 19.b6 Ne2 (19...cb6?? 20.Rfc1+-) 20.Qe2 a6=) 19.Qd4+/- c5 (better 19...Kb8!?+/-) 20.bc6!+- bc6 21.Ba6 (21.Rfc1 Kb7+-) 21...Kd7 (21...Kb8+-) 22.Qa7 Ke8 23.Qe7 (23.Bb7 Qc7+-) 23...Ke7 24.Bb7 Bd7 (24...c5 25.a6 Ke6 26.a7 Ke5 27.Rfc1+-) 25.a6 Rb8 26.a7?? (better 26.Na5 Rb7 27.Nb7+-) 26...Rb7-+ 27.a8Q (27.Na5 Rc7 28.Rfb1 Ra8-+) 27...Ra8 28.Ra8 Rb3 0-1. Xaver (1640) - johnjoe (1720), Rated Classical game, lichess.org, 2013.

4.c4 e6 5.cd5 Qd5 6.Nc3 Qd8 7.Nf3 Bb4 8.Nd4 (8.Qa4!? Nc6 9.e4+=) 8...Bc3=+ 9.Qa4 c6 10.Bc3 Bg6 11.Qb3 Qc7 12.Nf3 Nd7 (12...Nf6!?=+) 13.Bg7+= Rh7 14.Bc3 Ngf6 15.Nh4 Bh5 16.Rb1 (16.f3 Nd5+=) 16...b6 (16...Ne4 17.d4+= (17.Qb7?? Rb8 18.Qb8 Nb8-+)) 17.Qb2 (better 17.Bf6 Nf6 18.Rc1+=) 17...c5?? (better 17...Ne4=) 18.Bf6+- Rc8 (18...c4 19.Rc1 Qd6 20.Rc4+- (worse 20.Bc4 e5 21.Bb5 Qf6 22.Bd7 Kd7 23.Qb5 Ke7 24.Qb4 Ke8 25.Qa4 Kf8+-)) 19.Bc3 (19.Bd3 e5 20.Be5 Qe5 21.Bh7 Qb2 22.Rb2 Rd8+-) 19...Qd8 (19...Qd6 20.Bb5+-) 20.Nf3 (better 20.Qc2!? f5 21.Nf5 ef5 22.Qf5 Rf7 23.Qh5 Qg5 24.Qg5 hg5+-) 20...Bg6 (20...Bf3 21.gf3 Qg5 22.Bb5+-) 21.Be2 (better 21.Bb5 a6 22.Ba6+-) 21...Bb1 22.Qb1 Ke7?? (22...f5+-) 23.Qh7 1–0. GuestSHSP – GuestJJWQ, freechess.org, 2017.

5.c4 e6 6.h3 Ngf6 7.a3 Be7 (7...Bd6 8.c5 (8.Nc3 dc4 9.Bc4 0-0 10.0-0 Nb6 11.Be2 Nbd5 12.Nb5) 8...Be7 9.Be2 0-0 10.0-0 c6 11.Nd4 Bg6 12.Nc3; 7...dc4 8.Bc4 (8.Nc3 Nb6 9.Ne5 a5 10.ba5 Ra5 11.Nc4 Nc4 12.Bc4; 8.Nd4 Bd3 9.Bd3 cd3 10.Qb3 e5 11.Nf5 g6 12.Ng3) 8...Nb6 9.Bb5 c6 10.Be2 Bd6 11.d3 Bg6 12.e4; 7...a5 8.ba5 (8.Nd4 Bg6 9.cd5 ed5 10.Qb3 ab4 11.ab4 Ra1 12.Ba1; 8.cd5 ed5 9.Qb3 ab4 10.ab4 Ra1 11.Ba1 c6 12.Bd4; 8.Nc3 dc4 9.ba5 Nc5 10.Bc4 Bd3 11.Bd3 Nd3 12.Ke2; 8.b5 Bd6 9.Nd4 Bg6 10.Nc3 0-0 11.cd5 Nd5 12.Nd5; 8.Qb3 dc4 9.Bc4 Nb6 10.Nd4 Be4 11.Nc3 Bg2 12.Rh2; 8.c5 ab4 9.ab4 Ra1 10.Ba1 Be7 11.Nc3 0-0 12.Be2) 8...dc4 9.Bc4 Ra5 10.Nc3 Be7 11.0-0 0-0 12.d4) 8.cd5 (8.Nc3 0-0 9.Qb3 dc4 10.Bc4 Nb6 11.Be2 a5 12.Nd4; 8.Qb3 Nb6 9.Nd4 dc4 10.Bc4 Nc4 11.Qc4 Bg6 12.Nc3) 8...ed5 (8...Nd5 Inferior is 9.Bg7 Rg8 10.Bd4+= Bf6 11.Nc3 Nc3 12.Bc3) 9.Be2 (9.Nc3 0-0 10.Qb3 Be6 11.Nd4 c5 12.Ne6) 9...0-0 10.0-0 (10.Nc3 a5 11.Qb3 ab4 12.ab4) 10...Re8 (10...a5 11.Nd4 Bg6 12.b5) 11.Nc3 c6 (11...c5 12.bc5) 12.Qb3 (12.Nd4=) 12...Nb6 13.Rac1 (13.Na4 Na4 14.Qa4 Nd7=) 13...Rc8 (13...a5 14.b5=) 14.a4 (14.Na4 Nfd7=) 14...Qd6 15.Na2 Nbd7 16.Nd4 Bg6 17.f4 (17.a5 Bf8=) 17...Ne4 18.Nf3 (18.Rfd1!?+=) 18...Ng3-/+ 19.Rf2 Bf6 (19...Ne2!? 20.Re2 c5-/+) 20.Bf6 Nf6 21.Nc3 Re7 22.Ne5 Bf5 23.Bf3 d4 24.Ne2 Nge4 25.Nd4+= Bg6?? 26.Ng6+- Rec7 27.Ne5 Nf2 28.Kf2 a6 29.Kg1 Re8 30.Qc4 Rec8 31.Rc3 Nd5 32.Bd5 cd5 33.Qb3 Rc3 34.dc3 g6 35.e4! Rd8 36.g3 1–0. Chirpii,Alexandru – Fratila,Adela (2090), Centrocoop op, 1997.

5.c4 e6 6.h3 Ngf6 7.Nc3 dc4 (7...Bb4 8.cd5 ed5 9.Qb3 a5 10.Nd5 Nc5 11.Nf6 gf6 12.Qd1) 8.Bc4 (8.a3 Nb6 9.Ne5 a5 10.ba5 Ra5 11.Nc4 Nc4 12.Bc4; 8.Nd4 Nb6 9.Nf5 ef5 10.a3 Qd7 11.d3 a5 12.ba5) 8...Nb6 9.Be2 Bb4 10.Qb3 c5 11.Bb5 Nbd7 12.Nh4.

5.c4 e6 6.h3 Ngf6 7.cd5 A) 7...Bb4 8.a3 (8.Qa4 Qe7 9.a3 Bc5 10.g4 Bg6 11.de6 Qe6 12.d4; 8.Nd4 Nd5 9.Nf5 ef5 10.a3 Ba5 11.Bg7 Rg8 12.Bb2) 8...Bd6 9.g4 Bg6 10.de6 fe6 11.Bc4 Qe7 12.Nc3; B) 7...ed5 8.Nd4 Be4 9.a3 c5 10.bc5 Bc5 11.Nc3 Bd4 12.ed4; C) 7...Nd5 8.g4 (8.a3 a5 9.ba5 Ra5 10.Nc3 Nc5 11.Ne5 Be7 12.d4) 8...Bg6 9.a3 a5 10.ba5 Ra5 11.Nc3 N5f6 12.Nb5.

5.c4 e6 6.h3 Ngf6 7.g4 Be4 8.a3 (8.cd5 ed5 9.a3 a5 10.ba5 Ra5 11.Nc3 Be7 12.Ne4; 8.b5 Bd6 9.Nc3 0-0 10.cd5 ed5 11.Be2 Qe7 12.d3) 8...a5 9.ba5 Ra5 10.d3 Bf3 11.Qf3 Be7 12.cd5.

4.e3 e6 (--> 3.e3 e6 4.Nf3 a6).

4.e3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 a6).

5.a3 e6 6.Be2 Nf6 (6...Qe7 7.Nc3+=) 7.0-0 (7.Nh4 Bg6+=) 7...Bd6 (7...Qd6 8.Nh4 Bg6 9.f4+=) 8.Nc3 (8.Nh4 Ne7+=) 8...e5= 9.d3 (9.b5 ab5 10.Nb5 0-0=) 9...e4 (9...0-0 10.b5 ab5 11.Nb5=) 10.de4= de4 11.Nd4 Nd4 12.Qd4 Qd7 13.Nd5?? (better is 13.Rad1=) 13...Nd5-+ 14.Qd5?? 0-0 15.Qb7?? Qe6 16.Rad1 Qh6 17.g3 Bh3 18.Rfe1+/– Qe6 19.Qd5 Qe7 20.Qh5 Be6+/– 21.f3 Bd7? 22.f4 g6 23.Qh6 f6+/– 24.Bc4 Kh8 25.Qh4 Qg7 26.g4 Bb5 27.Bd5 Rad8 28.g5 h6 29.Bf6 Rf6 30.gf6 Qh7 31.f7 Rf8 32.Qf6 Qg7 33.Qg7 Kg7 34.c4 Bd7 35.Rf1 Bf5 36.c5 Be7 37.a4 Bf6 (38.Rb1 Rd8+-; 37...Bh3 38.Rf2 Rb8 39.Rd4 Bc5 40.Re4 Rb4 41.Rb4 Bb4 42.Rc2+-). wood – lowbrow2, Live Game Caissa's Web, 2005.

5.a3 Nf6 6.Be2 g6 (6...Qd6 7.Nh4 Bd7 8.f4=) 7.Nh4 (7.Bf6 ef6 8.d4 Bd6+=) 7...Be6= 8.0-0 Bg7 9.Nf3 0-0 10.c3 Qd6 11.a4 (11.d4 Bf5=) 11...Rad8 (11...Ne5 12.Ne5 Qe5 13.d4=) 12.d4 Ne4 13.Nbd2 Bf5 14.Nh4 (14.b5 Nd2 15.Nd2 Nb8+=) 14...Nd2 (better is 14...Bd7!?=) 15.Nf5+/– gf5 16.Qd2 e6 (better is 16...Qg6!?+/–) 17.Ba3+- Qd7 18.b5 ab5? (better is 18...Ne7+-) 19.Bf8 Bf8 20.ab5 Ne7 21.Ra7 b6 (21...c6 22.Qb2+-) 22.Rfa1 Nc8 23.Ra8 Nd6 24.Bd3 Be7 25.R8a7 (25.Qe2 c5 26.R8a7 Qe8 27.dc5 bc5+-) 25...Rc8 (25...Nb5 26.Bb5 Qb5 27.Rc7+-) 26.Qa2 Kg7 27.Qe2 h6 28.R1a6 Qd8 29.Qf3 (29.g4 fg4 30.Qg4 Kh8+-) 29...Bg5 (29...c6 30.bc6 Rc6 31.Ra8+-) 30.Qg3 Kh7 31.h3 (31.Ra3 Qe8 32.Rb3 Ra8+-) 31...Be7 32.Qf3 Qe8 (32...c5 33.bc6! Rc6 34.Ra8+-) 33.Qe2 Bg5 (33...Kg7 34.c4 dc4 35.Bc4+-) 34.Qf1 (34.Kh1 c6+-) 34...Be7 (34...Kg7 35.c4 dc4 36.Bc4+-) 35.f3 (35.g4 Ne4+-) 35...Bg5 36.Qe2 Kg7 37.g3 Be7 38.Qf1 (38.c4 dc4 39.Bc4 Nc4 40.Qc4 Qd7+-) 38...Bg5 39.f4 Be7 (39...Bd8 40.Ra8+-) 40.Qe2 Bf6 41.Kf2 (41.c4 dc4 42.Bc4 c5 43.Rb6 Nc4 44.Qc4 cd4+-) 41...Be7 (41...Bd8 42.Ke1+-) 42.Qf1 (42.Kf1 c6+-) 42...Bf6 43.Ra1 (43.g4 fg4 44.hg4 Bh4 45.Kg1 Bd8+-) 43...Qd7 (43...c5!? 44.bc6! Qc6 45.R1a3+-) 44.Qe2 Rb8 (44...Qe8 45.R7a6+-) 45.R7a6 (45.Ke1 Nc8 46.R7a3 Be7+-) 45...Be7 (45...c5 46.bc6! Qc6 47.R1a3+-) 46.R6a4 (46.g4 Ne4 47.Be4 fe4+-) 46...Bf6 (46...c5+-) 47.Ra7 Qc8 (47...Nc8 48.R7a6+-) 48.Qf1 (48.g4 Ne4 49.Kg1 Rb7 50.gf5 ef5+-) 48...Bd8 (48...c5 49.bc6! Qc6 50.R7a3+-) 49.Qd1 (49.Qg2 c5 50.g4 Bh4 51.Kf1 Kf8 52.gf5 c4+-) 49...Qd7 (49...c5 50.bc6! Qc6 51.Qb3+-) 50.Qc2 Nb5? (50...Rc8+-) 51.Qa4 Qc6 52.Bb5 Qc3 53.Qd1 c6 (53...Qb2 54.Qe2 Qe2 55.Ke2 h5+-) 54.Qh5 Qc2 55.Be2 Bc7 (55...Kh8 56.Qf7 Rb7 57.Qe8 Kg7 58.Rb7 Bc7 59.Rc7 Kf6 60.Qf7) 56.Rc7 Rf8 (56...Qe2 57.Ke2 Kg8 58.Qf7 Kh8 59.Qg7) 57.Raa7 1–0. Bonetti,Shane – patologo (1675), ICC, 2002.

5.b5 Nb8 =.

4.a3 d4 5.c3 e5= 6.cd4 ed4 (6...Nd4 7.Nd4 ed4 8.e3 de3 9.de3 Qd1 10.Kd1=) 7.e3 (better 7.b5!? Nce7 8.Nd4+/-) 7...de3 8.fe3 f6 (8...Nf6 9.Be2=) 9.Bb5+= Qd6 10.Bc6 (10.Nd4!? Bd7 11.Qh5 g6 12.Qf3+=) 10...Qc6= (worse 10...bc6 11.Nd4 Bg6 12.0-0+/-) 11.0-0 0-0-0?? (11...Bd3 12.Rf2=) 12.Nh4?? (better 12.Nd4 Rd4 13.Bd4+- (13.ed4?! Nh6+/-; 13.Rf5?! Rd8+=)) 12...Be4 (12...Bd3 13.Re1=+) 13.Nc3 (better 13.d4=) 13...g5?? (better 13...Bd3!? 14.Ne2 Nh6=+) 14.Ne4 (14.Qg4 Qd7 A) 15.Qe4?! gh4 16.Rf3 c6+/- (16...Qd2? 17.Rd1 Qd1 18.Nd1 Rd1 19.Kf2 Rd2 20.Ke1+-); B) 15.Qd7 Rd7 16.Ne4 gh4 17.Nf6 (17.Bf6?! Nf6 18.Nf6 Rd2+=) 17...Nf6 18.Bf6+- (18.Rf6?! Bg7 19.Ra2 Bf6 20.Bf6 Rf8 21.Bh4 Rd3=)) 14...Qe4+/- 15.Nf3 g4 (15...h6 16.Rc1+/-) 16.Nd4 (16.Ng5 Qg6 17.Ne6 Re8+-) 16...h5 17.Nb5 (17.Qe2 Bd6+/-) 17...a6 18.Nc3 (18.Nd4 Bd6+=) 18...Qc6 (18...Qd3!? 19.Qb3 Qd2=) 19.Ne2 Bh6 (better 19...Qd7 20.Bd4 Bd6+=) 20.Rc1 (20.Bd4 h4+/-) 20...Qe4 (20...Be3 21.Kh1 Rd2 22.Qd2 Bd2 23.Rc6 bc6 24.Ng3=+ (24.Bf6? Nf6 25.Rf6 Re8-+)) 21.Ng3 (21.Bd4 h4+/-) 21...Qe6 (better 21...Be3 22.Kh1 Qg6=) 22.Qc2+/- Rd2?? (better 22...c6 23.Ne4 Qd5+/-) 23.Qc7 1-0. mohammadd – Nuka, Rated Classical game, lichess.org, 2013.

4.a3 f6 5.Nh4 Bg4 6.f3 =.

4.a3 h6 5.e3+= e6 6.Bb5 a6 7.Bc6 bc6 8.Nd4 Qd7 (8...Qg5 9.0-0+= (9.Nc6? Qg2 10.Rf1 Bh3-+; 9.Nf5?! Qf5 10.c4 dc4=)) 9.Nf5+/– ef5 10.0-0 Ne7 11.d3 Ng6 12.Nd2 Bd6 (better is 12...a5!?+/–) 13.Bg7+- Rg8 14.Bd4 Ne5 (14...Nh4 15.g3 f4 16.Bf6 fg3 A) 17.hg3? Bg3 18.Bh4 Be5 (18...Bh4?! 19.Kh2+=) 19.Bg3 Qh3-+; B) 17.Bh4=) 15.f4 Ng4? (15...Ng6+-) 16.h3 c5 (16...h5 17.hg4 fg4 18.Qe1+-) 17.bc5 (17.hg4?! cd4 18.Qf3 de3+/–) 17...Bc5 (17...Bf8 18.hg4 Rg4 19.Nf3+-) 18.Bc5 (worse is 18.hg4 Bd4 19.ed4 fg4 20.Qe1 Qe7+-) 18...Qb5 19.Nb3 (worse is 19.hg4 Qc5 20.gf5 Qe3 21.Rf2 Qb6+-) 19...Nf6 20.Qf3 0-0-0 (20...Rd8 21.Bd4 Rg6 22.Rab1+-) 21.Be7 Rd7 (21...Rg6 22.Bd8 Kd8 23.Rfb1+-) 22.Bf6 Rd6 23.Bd4 Rdg6 24.Rf2 a5 (24...Qc6 25.Qh5+-) 25.Qh5 a4 (25...Kd8 26.Qf5 Qd7 27.Qd7 Kd7 28.Na5+-) 26.Nc5 Kd8 27.Qf5 Qc6 28.Qf7 (28.Rb1 Rf8 29.Rb8 Ke7 30.Qe5 Re6 31.Ne6 Rb8 32.Nc5 Kd8 33.Qh8 Ke7 34.Qb8 f6+-) 28...h5 29.Rb1 Kc8 30.Qf5 Kd8 31.Bf6! Rf6 (31...Qf6 32.Qd7 Mate attack; 31...Rf6 32.Rb8 Double attack) 32.Qh7 Rfg6 (32...Rf7 33.Qf7 Rg2 34.Rg2 Qe6 35.Ne6 Kc8 36.Qc7) 33.Rb8 1–0. themonkey – bussundaal, GameColony.com, 2002.

4.e3 Nb4+= 5.d4?? (better is 5.Nd4 Bd7 6.a3-/+) 5...Nc2-+ 6.Ke2 Na1 7.Ba1 e6 8.Qa4 c6 9.Ne5 (9.Qb3 Qb6 10.Nbd2 Nf6-+) 9...Bd6 (9...Bb1!? 10.Nc6 Qd7 11.Qb3 Ba2 12.Qa2 bc6 13.Kf3-+) 10.Nc6 (10.Nd2-+) 10...Qd7 (10...Bb1? 11.Nd8 Kd8 12.Qa5 b6 13.Qb5+-; 10...bc6 11.Qc6 Kf8 12.Nc3-+) 11.Kf3 (11.Nc3 bc6 12.Bb2-+) 11...Qc6 (better is 11...Bb1 12.Bb5 Be4 13.Ke2 a6-+) 12.Bb5-/+ Be4 (12...Ne7 13.Bc6 Nc6 14.Nc3-/+) 13.Ke2 Ne7 14.Bc6 (14.Bc6 Nc6 15.Nd2+=). Nautiluschess – molskinner, ICS blitz, 2000.

5.e3 a6 6.Be2 Nge7 7.0-0 h6 (7...Ng6 8.b5 ab5 9.Bb5=) 8.d3 Qd7 9.Nbd2 0-0-0 10.d4 Ng6 11.b5 ab5 12.Bb5 Kb8 (12...Qd6 13.c4+/–) 13.c4 (13.a4 Ka7+/–) 13...Bd3 14.Re1 Bc4 (14...Be7 15.Rc1+/–) 15.Nc4+- dc4 16.Qa4 Qd5 17.Rab1 Na7 18.Bc4 Qc6 19.Qb3 Be7 (19...Nc8 20.Rec1+-) 20.Red1 Nh4 (20...Qb6 21.Qa2 Qd6+-) 21.Nh4 Bh4 22.d5 ed5 23.Bd5 (23.Rd5?! Bf6 24.Bf6 gf6+-) 23...Rd5 (23...Qb5 24.Bg7 Qb3 25.Rb3 (25.Bb3?! Rh7 26.Bb2 h5+-) 25...Rd5 26.Rd5+-) 24.Rd5 (24.Qd5?! Rd8 25.Qb3 Rd1 26.Rd1 Qg6+-) 24...Rh7 (24...Be7+-) 25.Be5 Nc8 (25...b6 26.Rd7! Qe6 27.Bc7 Kc8 28.Rf7 Qb3 29.Rb3 Nc6+-) 26.Rc5! Bf2 (26...Qc5 27.Qb7) 27.Kf2 Qa6 (27...Ka8 28.Rc6 b6 29.Qa4 Kb7 30.Rc7 Kb8 31.Rf7 Nd6 32.Qe8) 28.Bc7 Ka8 29.Ra5 b6 30.Ra6 Kb7 31.Qd5 Kc7 (31...Ka6 32.Qa8 Na7 33.Rb6 Ka5 34.Qa7) 32.Rc1 Kb8 33.Ra8 1–0. COMP – COMP, 2002.

5.e3 Qd6 6.Bb5 =.

5.e3 Bg4 6.Be2 Nf6 7.h3 Bh5 8.0-0 Be7 9.d3 0-0 10.Nbd2 Bd6 11.Nd4 Be2 12.Qe2 Re8 (12...Nd4!? 13.Bd4 e5=) 13.Nc6+= bc6 14.f4 (14.e4 Nd7+=) 14...e5 15.fe5 Be5 16.Be5 Re5 17.Nf3 Re8 18.Qf2 Qe7 19.Rae1 Rad8 (19...c5 20.Nh4 cb4 21.Nf5+=) 20.Re2 (20.Nd4 Qd7 21.Qh4+-) 20...c5= 21.c3 (21.Nh4 cb4 22.Nf5 Qe5 23.ab4 Rb8+=) 21...cb4 22.cb4 c5 23.bc5 Qc5-/+ 24.Ra1 Qc3 25.Raa2 Qd3-+ 26.Nd4 Ne4 27.Qe1 Nc3 28.Rad2? Qe4 29.Rf2 Qe3 30.Qe3 Re3 31.Nc6 Rd7 32.Rb2 g6 33.Rfc2 d4 34.Rd2 d3 35.Nb4 Ne4 36.Rd1 Re2 37.Rb3?? d2 38.Kf1 Ng3 39.Rg3+- Rde7 40.Nd3 h5 41.Rf3 g5 42.Rf2 R2e3 43.Rfd2 Rd7 44.Kf2 Re6 45.Nc5 Rf6 46.Kg1 Rc7 47.Ne4 Ra6 48.Rd3 Ra5 49.Nf6 Kg7 50.Nh5 Kg6 51.Ng3 f6 52.Ne4 Rc2 53.R1d2 Rc1 54.Kf2 Rf5 55.Rf3 Ra1 56.Rf5 Kf5 57.Nd6 Ke6 58.Nc4 Rc1 59.Re2 Kd5 60.Ne3 Kc5 61.Rc2 Rc2 62.Nc2 f5 63.Ke3 a5 64.Kd3 a4 65.Kc3 f4 66.Nd4 1–0. Fournier,Frederic (1870) – nfverna (1910), Active, 2004.

5.d3 e6 6.Nbd2 Bc5?? 7.Bg7+- f6 (7...Nf6 8.Bh8 Qe7 9.e4+-) 8.Bh8 Kf7 (8...Nh6 9.e4 de4 10.de4+-) 9.Bf6! Qf6 (9...Qf6 10.e4 Combination; 9...Kf6 10.e4 Combination; 9...Nf6 10.d4 Combination) 10.e3 (10.e4 Bg4+-) 10...Bb4 11.Be2 (11.Rb1 Bc3+-) 11...Bc3 12.Rb1 Nh6 (12...e5 13.0-0 e4 14.Ne1+-) 13.0-0 (13.h3 Bg6+-) 13...Rg8 14.e4 (14.Kh1!? Kg7+-) 14...Bh3 15.e5?? (better 15.Ne1+-) 15...Rg2 (better 15...Bg2 16.Ng5 Qg5-+) 16.Kh1+/- Qf4 17.Rg1 Rf2 18.Rg3 Bg4 19.Kg1 Bd2?? (19...Bd4 20.Nd4 Qd4+/-) 20.Kf2+- Be3 (20...Bc3 21.Qc1 Be5 22.Kg2+-) 21.Kg2 Nf5 22.Rg4! Qg4 23.Kf1?? (better 23.Kh1+/-) 23...Nh4 (23...Qh3 24.Ke1 Qg2 25.Qd2 Qh1 26.Bf1 Bd2 27.Nd2 Qh2 28.Nf3 Qc2 29.Nd2-+) 24.Nh4 (24.Ng5 Qg5 25.Bh5 Ke7 26.Qg4 Qg4 27.Bg4-+) 24…Qg1 0-1. psgallar - toliy (1645), Rated Classical game, lichess.org, 2013.

5.e3 a6 6.a4 (6.ba6 ba6 7.Bd3 Rb8+=) 6...ab5 7.ab5 b6 (7...Nf6 8.Bd3 Bd3 9.cd3=) 8.Be2 (8.Nd4 Bg6+=) 8...Nf6+= 9.0-0 h6 10.d4 (10.Nc3 e6+-) 10...g5 (10...e6!?=) 11.Nbd2 Qd6 12.c4 Bg7 13.Bc3 (13.cd5 0-0+- (13...Nd5?? 14.e4+-)) 13...0-0 14.Ba5 (14.c5 Qe6+-) 14...ba5 (14...Ra5 15.Ra5 ba5 16.c5+-) 15.Ra4 (15.Ne5 Rfd8+-) 15...Ne4 (15...dc4!? 16.Nc4 Qd5+=) 16.c5+- Qe6 17.Nb3?? (better 17.Ne4 Qe4 18.Qa1+-) 17...Nc3-+ 18.Ra5 (18.Qd2 Na4 19.Ra1-+) 18...Nd1 19.Bd1 (19.Rd1 Ra5 20.Na5 Ra8-+) 19…Ra5 (19...Ra5 20.Na5 Bd3-+) 0–1. Bendega (1885) – rezamas (1755), lichess.org, 2020.

5.e3 Nc4 6.Bc4 dc4 7.0-0 Nf6 8.Ne5 Be6 9.Na3 Qd5 10.Nec4 c6 11.bc6 bc6 12.d3 Rb8 13.Be5 Rc8 14.e4 Qd7 15.Qf3 Bc4 16.Nc4 (16.dc4?! Qg4+=) 16...e6 (16...Qg4 17.Qe3 Qd7 18.Rfb1+-) 17.Bf6 gf6 18.Qf6 Rg8 19.Rab1 Be7 (19...Rd8 20.Na5 Rg6 21.Qc3+-) 20.Qh6 Rh8 21.Qg7 (21.Qg7 Rf8 22.Qh7+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.e3 c5 6.d3 Nf6 7.Be2 e6 8.Nh4 Be7 9.Nf5 ef5 10.0-0 0-0 11.a4 d4 12.ed4 cd4 13.Nd2 Bc5 14.Re1 f4 15.Bf3 a6 16.Ne4 Bb4 17.Re2 Rc8 18.Rb1 ab5 19.ab5 Bc3 20.Ba3 Re8 21.Nd6 Re2 22.Qe2 Rc7 23.Nf5 g6 24.Be7 Qd7 25.Nh6 Kg7 26.Bf6 Kf6 27.Ng4 Kg7 28.Qe5 Kf8 29.Nf6 Qe7 30.Qf4 Qd8 31.Qh6 Ke7 32.Nd5 Kd7 33.Qh3 Kd6 34.Qg3 Kd7 35.Qe5 Kc8 36.Nc7 Qc7 37.Qe8 Qd8 38.Qf7 Qh8 39.b6 Kb8 40.Qc7 Ka8 41.Rb5 Qb8 42.Qc3 Qh2 43.Kh2 dc3 44.Ra5 Kb8 45.Rd5 Kc8 46.Bg4 Kb8 47.Rd8 1–0. Bonetti,Shane – Jockel (1950), ICC, 2002.

5.a3 Nc2 6.Qc2 Bc2 7.Nc3 Nf6 8.d4 c5! 9.dc5 e6 (9...d4 10.Na2 e5 11.Nb4-+) 10.c6 Qa5 (10...d4 11.cb7 Rb8 12.Nb1 Bb1 13.Rb1-+) 11.cb7 Rb8 12.e3 (12.Nd4 Rb7 13.e3 Rc7-+) 12...Bd6 (better 12...Rb7 13.Nd4-+) 13.Be2 (13.Nd4 Be5 14.Rc1 Bd4 15.Rc2 Bc5-+) 13...Ne4 14.0-0 (14.Nd4 Be5 15.Rc1 Bd4 16.ed4 Nc3 17.Rc2 Nb5 18.Kf1 Na3-+) 14...Nc3 15.Bc3 Qc3 0-1. psgallar – serjoga, Rated Classical game, lichess.org, 2013.

5.Na3 c6? 6.c3+- Nc2 (6...Qa5 7.Nd4 Bg6 8.cb4 Qb4+-) 7.Nc2 cb5 8.Ncd4 Bd7 9.Ne5 e6 10.e3 a6 11.Ndf3 Bc8 12.d4 Bd6 13.Bd3 (13.Qb3 f6 14.Nd3 Qe7+-) 13...Qc7 (13...f6 14.Ng5! fe5 15.Qh5 g6 16.Bg6 hg6 17.Qh8 Qg5 18.Qg8 Ke7 19.de5 Be5 20.Ba3 Kd7 21.Qf7 Kc6 22.0-0+-) 14.Qc2 (better is 14.h3!?+-) 14...f6+/– 15.Ng4 b4?? (better is 15...h5 16.Nge5 fe5 17.de5 Bc5+=) 16.Bh7+- Ne7 17.Bg6 Kd8 18.Bd3 Nc6 (18...e5 19.de5 fe5 20.Nge5 Be5 21.Ne5 Qe5 22.cb4+-) 19.h3 (19.c4!? dc4 20.Bc4 Na5+-) 19...e5 20.de5 fe5 21.Bf5 e4 22.Bc8 Rc8? (22...bc3 23.Bc3 Rc8+-) 23.Nd2+- bc3 24.Qc3 (24.Bc3?! Nb4 25.Bb4 Qc2 26.Bd6 Qb2=) 24...Bb4 (24...Rh7 25.Qb3 Rh5 26.Rc1+-) 25.Qb3 (better is 25.Qg7!? Qg7 26.Bg7 Rg8 27.Bf6 Kd7+-) 25...Bd2 26.Kd2 Qf7 27.Rhf1 Qd7 28.Ne5 (28.Ne5 Ne5 29.Be5+-) 1–0. manth007 (1645) – raksasa, gameknot.com, 2013.

5.Na3 d4 6.Nd4 Bg6 +/–.

5.d3 c6 6.a3 Nd3 7.cd3 cb5 8.Qb3 (8.Nc3 Nf6+-) 8...a6 9.e3 Rc8 10.Be2 Be6 (10...Nf6+-) 11.Nd4 Nf6 12.Nd2 (12.Ne6 fe6 13.Nd2 Qd6+-) 12...Qd7 (12...Bd7 13.e4 de4 14.de4+-) 13.0-0 Bf5 14.N2f3 e6 (14...Bg6 15.Ne5 Qd6 16.f4+-) 15.Nf5 ef5 16.Bf6 gf6 17.Rac1 Rg8 18.Rc8 Qc8 19.Qd5 f4 (19...Ba3 20.Nd4+-) 20.Qe4 Be7 1-0. FERNANDO_2013 (1775) - aditika (1715), Rated Classical game, lichess.org, 2017.

5.d3 d4!? 6.Bd4 Bg4 +/–.

5.d3 Qd6 6.a3+- e5? (6...Qc5 7.ab4 Qb4 8.Bc3 Qb5 9.e4+-) 7.ab4 (better is 7.Be5!? Nd3 8.cd3 Qb6+-) 7...Qb4 8.Bc3 Qb5 9.Be5 Bb4 (9...Qd7 10.e3+-) 10.c3 Bc5 (10...f6 11.Bc7 Qc6+-) 11.Bg7 Qb6 12.d4 (12.e3 Qb2 13.Nbd2 f6+-) 12...Bd6 (12...Qb2 13.Nbd2 Bc2 14.Qc1 (14.Bh8?! Bd1 15.Rb1 Qc3 16.Kd1 Bb4+-) 14...Qc1 15.Rc1+-) 13.e3 (13.Qc1!? a5+-) 13...Qb2 14.Na3 (14.Nbd2!? Bc2 15.Qc1 Qc1 16.Rc1 Bf5+-) 14...Ba3 (14...c6 15.Nb5 cb5 16.Bh8 Qc3 17.Nd2 Qb4+-) 15.Qa4 (15.Bh8?! Bc2 16.Rb1 Bb1=) 15...Bd7 (15...Ke7 16.Qa3 (16.Bh8 Qa1 17.Ke2 Qc3-+; 16.Ra3 Nf6 17.Bh8 Qc1 18.Ke2 Rh8+-) 16...Qa3 17.Ra3+-) 16.Qa3 Qc2 (16...Qa3 17.Ra3 f6 18.Bh8 Kf7+-) 17.Qf8 1–0. nordlicht (2120) – harzer, gameknot.com, 2005.

5.d3 e6? 6.c3 Qf6 7.a3 d4? (7...Nd3 8.ed3 Bc5+-) 8.cb4 (< 8.ab4 dc3 9.Bc3 Qd8+-) 8...0-0-0 9.Nbd2 Nh6 (9...e5 10.Rc1+-) 10.Qa4 Kb8 11.Rc1 (better is 11.Nc4+-) 11...Bd6 (11...e5+-) 12.Bd4 e5 13.Qa7 Kc8 14.Bb6 (better is 14.Nc4 Rde8 15.Nfe5 Be5 16.Be5 Re5 17.Nb6 Qb6 18.Qb6 Re7+-) 14...e4 15.Ne4 Be4 16.de4 (16.Bd4 Qe7 17.de4 Qe4+-) 16...Bf4 (16...Qb2 17.Be3 Ng4 18.g3 Ne3 19.Bh3 f5 20.fe3+-) 17.Qa8 (better is 17.e5 Qb6 18.Qb6 Bc1 19.Qc5 Ba3 20.b6+-) 17...Kd7 18.Rd1 (better is 18.Qb7!? Qb6 19.Qc6 Qc6 20.bc6 Ke6+-) 18...Ke6 19.Qb7 (better is 19.Nd4 Qd4 20.Bd4 (20.Rd4?! Ra8 21.e3 Be5 22.Bc4 Kf6+-) 20...Ra8 21.e3+-) 19...Qc3 20.Nd2 Bd2 21.Rd2 Qd2 0–1. Hardin – radi8288, Live Game Caissa's Web, 2004.

5.e3 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 b6 9.Bd3 Bd3 10.cd3 e6 11.Qc2 Nf6 12.Bf6 Qf6 13.Qc7 Qd8 14.Qc3 Nd7 15.0-0 Nc5 16.d4 Nd7 17.Qc6 Be7 18.Ne5 Bf6 19.Nd7 Qd7 20.Qb6 0-0 21.Rc1 Bd8 22.Qc6 Qe7 23.b6 Qb4 24.b7 Bf6 25.Qc8 Bg5 26.Qf8! Kf8 27.Rc8 Ke7 28.b8Q Qb8 29.Rb8 Kf6 30.f4 Bh6 31.d3 g6 32.h4 1–0. Marre – tomekbag, zagraj.pl, 2003.

5.e3 e6 6.c4 Bc5?? (better is 6...Nf6=) 7.Bg7+- Ne7 8.Bh8 Ng6 9.Bb2 c6 10.Nc3 Ne7 1–0. Pies,Gerhard – Liebsch,Eva, Leverkusen–ch op, 2005.

4.a3 c5 5.e3 cb4 6.ab4 a6 7.Be2 Qb6 8.b5 a5 (The passed pawn on a5 will become decisive later) 9.Bd4 Qc7= 10.Ra2 b6 11.0-0 e5=+ 12.Ba1 Bd6 13.h3 Ngf6=+ 14.d3 0-0 15.Nbd2 Rac8 16.c3 h6 17.Nb3 Be6 18.Qb1 Qb8 19.Rc2 Rc7 20.Rfc1 a4 21.Nbd2 Rfc8 22.c4 a3 23.cd5 (The passed pawn on d5 will quickly become a dangerous weapon) 23...Rc2 24.Rc2 Bd5 25.Rc8 Qc8 26.Nc4 Qc7 27.Nd6 Qd6 28.Nd2 Qc5 29.Nc4= Bc4 30.dc4 Qc7 31.Qc2 Qa7 32.f3 Qa8 33.Bd1 e4 34.Qc3 a2 ½–½. Furrer – Grutter, OH, 1992.

4.a3 Ngf6 5.Nh4 Bg4 6.h3 =.

4.d3 e5 5.Ne5 Bb4 6.c3 =+.

4.d3 e6 5.b5 c5 (5...Ngf6 6.e3=+) 6.bc6 bc6 7.Nbd2 c5 (7...Rb8 8.Bc3=+) 8.e4= Bg6 9.ed5 ed5 10.Be2 (10.Rb1 Ngf6=) 10...Bf5 (10...Ngf6 11.0-0=) 11.0-0 Ngf6 12.Re1 Be7 13.h3 (13.Nb3 0-0=) 13...0-0 (13...Rb8 14.Nb3=) 14.Rb1 (14.Ne5 Qc7 15.Nd7 Qd7=) 14...Qc7 (14...Re8 15.c4=) 15.Nh4 (15.d4 Rfe8=) 15...Be6=+ 16.Bg4?? (better is 16.c4=+) 16...Ng4-+ 17.hg4 Bh4 18.Nf3 Bg4 19.Qd2 Bf3 20.gf3 Rae8 21.Kh1 Ne5 22.Qf4 Bf6 23.Qg3 Qd6 24.d4 Nc4 25.Qd6 Nd6 26.Ba3 Bd4 27.c3 Bf2 28.Rf1 Re2 29.Rf2 Rf2 30.Bc5 Rf3 31.Bd6 Re8 32.Kg2 Rc3 33.Be5 Rc2 34.Kf3 Ra2 35.Kf4 g5! 36.Kf5 Rf2 37.Kg4 Re5 38.Rb8 Kg7 39.Rb4 Re4 40.Kh5 Rh2 41.Kg5 Rb4 42.Kf5 Re4 43.Kg5 Rf2 44.Kh5 Rf5# 0–1. Klawonn,Markus – Hinzpeter,Simone, JBLN West, 1993.

4.d4 Ngf6 5.e3 e6 6.Nc3 (6.b5 a6+=) 6...h6 (6...Bb4 7.a3 Ba5 8.Nd2-/+) 7.Ne5 (7.a3 Bd6+=) 7...Ne5 (7...Bb4!? 8.a3 Bd6-+) 8.de5+= Ng4 9.h3 (9.Qd4!? f6 10.ef6 Qf6 11.a3=) 9...Ne5-/+ 10.a3 c6 11.Be2 Bd6 12.0-0 Qh4 13.f4 g5?? (better is 13...Ng6 14.Kh2 0-0-0-/+) 14.fe5+= Be5 15.Nd5 (15.Rf2 Qg3 16.Kf1 Qe3+=) 15...Bb2= 16.Nc7 Ke7 17.Na8 Ba1 18.Qa1 Ra8 19.Bd3 Qh5?? (19...Bd3 20.Qf6 Kd6 21.Rd1+/–) 20.Qe5?? (better is 20.Bf5 g4 21.Bg4+-) 20...Bd3+= 21.cd3 Rc8 (21...Rd8 22.Qc5 Ke8 23.Qa7=) 22.e4 (better is 22.Qc5!? Kd7 23.Qa7+=) 22...Qg6 ½–½. nando (2145) – samp, net–chess.com, 2016.

4.d4 h6 5.e3 Bg4 6.Nbd2 Bf3 7.Nf3 Ngf6 8.a3 e6 9.Bd3 c6 10.0-0 Bd6 11.Re1 0-0 12.h3 a6 13.Nd2 Qc7 14.e4 de4 15.Ne4 Ne4 16.Be4 Rfe8 17.Qg4 (17.Qf3!?=) 17...Nf6 (better is 17...f5!? 18.Bf5 ef5 19.Qf5 Rf8 20.Qe6 Kh8-+) 18.Qf3= Ne4 19.Re4 f5 (19...a5!?=+) 20.Ree1 Qf7 21.c4 Rac8 22.Re2 Bf8 23.Rae1 Rc7 24.Bc1 b6? (24...Rd7!?+=) 25.Qg3 g6 26.Bf4 Rcc8 27.Be5 Bg7 28.Qe3 h5 29.f4 a5 30.g3 ab4 31.ab4 Be5 32.de5 b5 33.c5 Re7 34.Rd2 Rec7 35.Red1 Kg7 36.Rd6 Re8 37.R1d3 Qe7 38.Qd2 Qf8 39.Rd7 Rd7 40.Rd7 Kg8 41.Qd6 Qd6 42.Rd6 (42.ed6?! Kf8 43.Rc7 Rd8+-) 42...Kf7 43.Rc6 Rd8 44.Rd6 Rd6?? (44...Ra8+-) 45.cd6 Ke8 46.Kf2 Kd7 47.Ke3 Kc6 48.Kd4 h4 (48...Kb6 49.d7 Kc7 50.Kc5 Kd7 51.Kb5+-) 49.Ke3 hg3 50.Kf3 g2 51.Kg2 g5 52.fg5 (52...Kd7 53.Kf3+-) 1–0. badboy1221 – Daffodil, Live Game Caissa's Web, 2004.

4.Nh4 e6 5.Nf5 ef5 6.c4 (6.e3 Ngf6 7.a3 Bd6 8.Nc3 c6 9.Bd3 g6 10.0-0 0-0 11.f4; 6.a3 a5 7.e3 ab4 8.ab4 Ra1 9.Ba1 Ngf6 10.c4 Bb4 11.Bf6; 6.Nc3 Ngf6 7.a3 a5 8.ba5 Ra5 9.e3 Be7 10.d4 0-0 11.Bd3; 6.b5 Ngf6 7.e3 Bd6 8.Nc3 Qc8 9.Be2 0-0 10.0-0 Nc5 11.f4) 6...dc4 7.e3 Ngf6 8.Bc4 Nb6 9.Bb3 Bb4 10.Qf3 Qd3 11.Bf6.

4.Nh4 Be6 A) 5.e3 A1) 5...Ngf6 6.Nc3 (6.Be2 g6 7.Nc3 Bg7 8.0-0 c5 9.a3 Ne4 10.f4 Nc3 11.Bc3; 6.Na3 g6 7.Nb5 Bg7 8.Nd4 0-0 9.Bd3 c5 10.Ne6 fe6 11.bc5; 6.Bd3 a5 7.a3 g6 8.Nc3 Ne5 9.Nf3 Nd3 10.cd3 Bg7 11.0-0; 6.Nf3 g6 7.Nc3 Bg7 8.Be2 c5 9.bc5 Nc5 10.Nd4 0-0 11.0-0) 6...g6 7.Be2 Bg7 8.0-0 a5 9.a3 Ne4 10.f4 0-0 11.f5; A2) 5...a5 6.a3 (6.b5 Ngf6 7.Be2 g6 8.f4 Bg7 9.0-0 Nc5 10.f5 Bc8 11.Be5; 6.Be2 Ngf6 7.a3 g6 8.Nc3 Bg7 9.Nf3 Ne4 10.0-0 0-0 11.Nd4; 6.ba5 Ngf6 7.Nc3 Ra5 8.Nf3 g6 9.Nd4 Bg7 10.Ne6 fe6 11.Be2; 6.f4 Nh6 7.ba5 Ra5 8.Nf3 Bg4 9.Nc3 e6 10.h3 Bf5 11.Nb5) 6...Ngf6 7.Nc3 g6 8.Ne2 Bg7 9.Nf4 0-0 10.Bd3 c5 11.0-0; B) 5.Nf3 B1) 5...Bg4 6.c4 (6.e3 Ngf6 7.Nc3 e6 8.b5 Bd6 9.Be2 0-0 10.0-0 Nc5 11.h3; 6.Nc3 Ngf6 7.h3 Bf3 8.ef3 e6 9.b5 Bd6 10.Be2 0-0 11.0-0; 6.h3 Bf3 7.ef3 Ngf6 8.Nc3 e6 9.b5 Bd6 10.Be2 0-0 11.0-0; 6.a3 Ngf6 7.Nc3 a5 8.h3 Bf3 9.ef3 e6 10.b5 Bd6 11.Be2) 6...Ngf6 7.cd5 Nd5 8.Nc3 Nb4 9.Qa4 Bf3 10.gf3 e6 11.Rc1; B2) 5...a5 6.ba5 (6.b5 Ngf6 7.Nd4 Nc5 8.Ba3 b6 9.Bc5 bc5 10.Ne6 fe6 11.e3; 6.a3 Ngf6 7.Nc3 Bg4 8.h3 Bf3 9.ef3 e6 10.b5 Bd6 11.Be2) 6...Ngf6 7.Nc3 Nc5 8.d4 Nce4 9.Ne5 Ra5 10.e3 Qd6 11.a3; B3) 5...Bf5 6.Nc3 (6.Nh4 Be6 7.Nc3 a5 8.a3 Ngf6 9.Nb5 g6 10.Nd4 Bh6 11.e3; 6.c4 Ngf6 7.cd5 Nd5 8.a3 a5 9.d3 N5f6 10.Nbd2 e6 11.e4; 6.e3 Ngf6 7.Nh4 Bg4 8.f3 Be6 9.g4 g5 10.Nf5 h5 11.Nd4; 6.Bd4 Ngf6 7.Nc3 e6 8.Rb1 Bd6 9.Nb5 e5 10.Bb2 0-0 11.e3) 6...Ngf6 7.Nh4 Bg6 8.e3 e6 9.a3 a5 10.b5 Nc5 11.Be2; B4) 5...Ngf6 6.Nd4 (6.Nc3 a5 7.ba5 Nc5 8.d4 Nce4 9.Ne5 Qd6 10.a3 Ra5 11.e3; 6.e3 g6 7.Nc3 Bg7 8.Be2 c5 9.a3 0-0 10.0-0 Ne4 11.d4) 6...Bg4 7.f3 Bh5 8.a3 e5 9.Nb3 Be7 10.e3 0-0 11.Be2; C) 5.f4 C1) 5...Bg4 6.h3 Bh5 7.g4 e6 8.Nf3 Bg6 9.Nc3 Ngf6 10.a3 a5 11.Bg2; C2) 5...Ndf6 6.Bd4 (6.Nf3 a5 7.b5 Ne4 8.d3 Nd6 9.Nc3 Nf6 10.Qd2 a4 11.a3; 6.Nc3 a5 7.a3 Nh6 8.e3 Bg4 9.Nf3 e6 10.b5 Nf5 11.Be2; 6.e3 Nh6 7.Be2 Nf5 8.Nf5 Bf5 9.g4 Bd7 10.g5 Ne4 11.Nc3; 6.a3 Ne4 7.d3 Nd6 8.Nc3 Nf6 9.Nf3 a5 10.Nd4 Bd7 11.g3) 6...a5 7.b5 Qd6 8.e3 Ne4 9.Be2 Bd7 10.d3 Nc5 11.0-0; C3) 5...Nh6 6.Nc3 (6.Nf3 a5 7.b5 Nb6 8.e3 Na4 9.Bd4 Nf5 10.Nc3 Nd4 11.Nd4; 6.g3 Nf5 7.Nf3 Nb6 8.Na3 a5 9.b5 Na4 10.Qc1 f6 11.Bh3; 6.a3 Nf5 7.Nf5 Bf5 8.e3 a5 9.Nc3 e6 10.Nb5 Be7 11.Be2; 6.e3 Bg4 7.Nf3 Nf5 8.h3 Ng3 9.hg4 Nh1 10.Nc3 e6 11.Bd3) 6...a5 7.ba5 Ra5 8.e3 Nc5 9.d4 Bg4 10.Nf3 Na6 11.Be2; C4) 5...Nb6 6.Bd4 (6.e3 Nf6 7.Nc3 a5 8.a3 Bg4 9.Nf3 e6 10.b5 Bc5 11.h3; 6.Be5 a5 7.ba5 Ra5 8.e3 Nf6 9.Nc3 Nfd7 10.f5 Bf5 11.Bc7) 6...Qd6 7.e3 Nf6 8.Bc5 Qd7 9.Nc3 Bg4 10.Be2 Be2 11.Qe2; D) 5.Nc3 D1) 5...a5 6.a3 (6.ba5 Ra5 7.e3 Ngf6 8.Nb5 g6 9.Bc3 Ra8 10.Bd3 Bg7 11.f4; 6.e4 Ngf6 7.ed5 Nd5 8.ba5 Ra5 9.Nf3 N7f6 10.Nd5 Nd5 11.Be2; 6.b5 Ngf6 7.Nf3 Nc5 8.e3 g6 9.Ba3 Nfe4 10.Ne4 Ne4 11.Bb2) 6...Ngf6 7.Nb5 g6 8.Nd4 Bh6 9.e3 0-0 10.Be2 c5 11.Ne6; D2) 5...Ne5 6.e3 (6.e4 Nf6 7.Nf3 Nf3 8.Qf3 Ne4 9.Ne4 de4 10.Qe4 Bd5 11.Qf4; 6.Nf3 Nc4 7.Rb1 a5 8.ba5 d4 9.Ne4 Bd5 10.d3 c5 11.dc4) 6...Nf6 7.Nf3 Nf3 8.Qf3 a5 9.a3 g6 10.Na4 Bg7 11.Nc5; D3) 5...Ngf6 6.Nb5 (6.e3 g6 7.Nf3 Bg7 8.Nd4 0-0 9.Be2 c5 10.bc5 Nc5 11.0-0; 6.Nf3 a5 7.ba5 Nc5 8.d4 Nce4 9.Ne5 Qd6 10.Rb1 Qb4 11.Qd3; 6.f4 g6 7.Nf3 a5 8.a3 Bg7 9.e3 Ne4 10.Bd3 0-0 11.0-0) 6...a5 7.a3 g6 8.e3 Bg7 9.Bd3 0-0 10.0-0 c5 11.f4.

4.Nh4 Bg4 5.h3 Bh5 6.g4 e5 7.Nf3 e4 8.Ne5 Ne5 9.Be5 Bg6 10.e3 (10.a3 Nf6=+) 10...Nf6 (10...Bb4 11.Bg7 Bd2 12.Nd2+-) 11.c4 Bb4 (11...dc4 12.Bc4 Bd6 13.Bd6 Qd6 14.Qa4 c6 15.b5-/+) 12.Qa4=+ Nd7 13.Bg7 Rg8 14.Qb4 Rg7 15.cd5 Nb6 (better is 15...Rb8!?+=) 16.Bb5+/– Nd7 17.Nc3 Qe7 (17...c5 18.dc6 bc6 19.Bc6 Rc8+-) 18.Bd7 Qd7 19.Qb7 Rd8 20.Nb5 f5 21.d6 (better is 21.Rc1 c5 22.Qd7 Rgd7 23.Rc5+-) 21...cd6+/– 22.Qd5 fg4 23.Rc1 Re7?? (better is 23...gh3 24.Rc7 Qc7 25.Nc7 Rc7+=) 1–0. Hovorka – Bennet, Quad Racine Chess Cl, 1988.

4.Nh4 Nh6 A) 5.Nc3 d4 (5...Ne5 6.e4 de4 7.Qe2 Nc6 8.Ne4 e6 9.Nf5 Nf5 10.c3 Be7 11.g3) 6.Nb5 e5 7.Nf5 Nf5 8.g4 Nh4 9.c3 c6 10.Na3 dc3 11.Bc3; B) 5.Nf5 Nf5 6.Nc3 (6.c4 a5 7.ba5 Nc5 8.cd5 Qd5 9.Nc3 Qd7 10.d4 Qd4 11.Qd4; 6.a3 e6 7.Nc3 a5 8.e4 de4 9.Ne4 h5 10.Bd3 ab4 11.ab4) 6...d4 7.Ne4 Nf6 8.Nf6 ef6 9.c3 Qd5 10.Qa4 c6 11.cd4; C) 5.e3 e6 6.Nf5 Nf5 7.Nc3 d4 8.ed4 Bb4 9.Ne4 Nf6 10.Nf6 Qf6 11.c3; D) 5.a3 D1) 5...a5 6.Nc3 (6.Nf5 Nf5 7.Nc3 d4 8.Nb5 e5 9.e4 Nh6 10.c3 c6 11.cd4; 6.e3 e6 7.Nf5 Nf5 8.g4 Nh4 9.Rg1 Bd6 10.Bg7 Rg8 11.Bc3; 6.b5 Nc5 7.Nf5 Nf5 8.g4 Na4 9.Be5 Nh6 10.e3 f6 11.Bc3) 6...Ne5 7.Nf5 Nf5 8.e4 de4 9.Ne4 Qd5 10.Qe2 Nc6 11.Qd3; D2) 5...c6 6.Nf5 (6.e3 e6 7.Nf5 Nf5 8.Bd3 Bd6 9.0-0 0-0 10.Nc3 Ne5 11.Be2; 6.g3 a5 7.Nf5 Nf5 8.b5 Nc5 9.Bh3 e6 10.0-0 cb5 11.Nc3) 6...Nf5 7.Nc3 Ne5 8.e3 e6 9.Nb5 Nc4 10.Bc4 dc4 11.Nd4; D3) 5...a6 6.Nf5 (6.d3 Nf6 7.Nd2 Bd7 8.Nhf3 e6 9.e4 c5 10.Rb1 Bc6 11.Ne5; 6.e3 Bg4 7.Nf3 e6 8.h3 Bf5 9.Be2 a5 10.0-0 ab4 11.ab4; 6.g3 e6 7.Nf5 Nf5 8.Bh3 Qg5 9.Nc3 Nf6 10.f4 Qg6 11.0-0) 6...Nf5 7.e3 e6 8.Bd3 c6 9.0-0 Bd6 10.Bf5 ef5 11.Bg7; D4) 5...e6 6.Nf5 (6.g3 a5 7.b5 Nf6 8.Bg2 Bc5 9.0-0 0-0 10.Nc3 Qd7 11.d4) 6...Nf5 7.Nc3 a5 8.e4 de4 9.Ne4 Nf6 10.Nf6 gf6 11.Qf3.

5.Nb5 c6 6.Nbd4 Bg6 7.Nh4 e5 8.Ng6 hg6 (8...fg6?! 9.Ne6 Qb6 10.a3=) 9.Nf3 e4 10.Ne5 Bb4 11.Rb1 e3! 12.fe3 Ne4 13.Nf3 Bd6 14.d3 (14.Rg1 Qc7 15.g3 Rh2-+) 14...Bb4 (better is 14...Qa5 15.c3 Rh2 16.de4 Rh1 17.ed5 Bg3 18.Kd2 Qd5 19.Kc2 Qa2 20.Qd4-+) 15.c3 Bc3 (15...Nc3?! 16.Bc3 Bc3 17.Kf2-+) 16.Bc3 Nc3 17.Qb3 Nb1 18.Qb1 Qb6 19.Qa1 Qe3 20.Qg7 0-0-0 21.Qd4 Qd4 22.Nd4 Ne5 23.Kd2 c5 24.Nc2 d4 25.g3 c4 26.h4 c3 27.Ke1 Kc7 28.Bg2 Rhe8 29.Kd1 Re6 30.Rf1 b5 31.Rf4 Red6 32.Re4 f6 33.g4 Nc6 34.Na3 Kb6 35.g5 (35.Nc2 Kc5-+) 35...f5 36.Rf4 Ne7 37.Nc2 Kc5 38.a3 a5 39.h5 (39.Na1 Nd5 40.Nb3 Kb6 41.Bd5 Rd5-+) 39...gh5 40.Bf3 (40.Rh4 Ng6 41.Rh5 Nf4-+) 40...b4 (better is 40...Rg6!? 41.e3 de3 42.d4 Kd6 43.Ne3 Rg5 44.Kc2-+) 41.ab4 ab4 42.Na1 Kb5 43.Bh5 Nd5 44.Rf5 Ka4 45.Rf7 b3 46.Ra7 Kb4 47.Rb7 Rb6 48.Rb6 Nb6 49.Bf7 Nd5 50.g6 (50.Nb3 Kb3 51.Kc1-+) 50...Ne3 51.Kc1 Rh8 52.Bd5 Nd5 53.Nb3 (53.Nc2 bc2 54.Kc2 Rh1 55.e4 Ne3) 53...Rh1 (54.Kc2 Ne3) 0–1. Vajnik,Eduard (2100) – Mazziotti Irigoyen,Gabriel (2135), Club Argentino–ch Superior, 2001.

5.g3 e5-/+ 6.d3 (better is 6.b5!?-/+) 6...Bb4-+ 7.Bg2? (better is 7.a3 Ba5 8.Nd2-+) 7...d4 8.0-0 (8.a3 Ba5 9.Qd2 c6-+ (9...dc3?! 10.Bc3 Bc3 11.Qc3-+; 9...Bc3?! 10.Bc3 dc3 11.Qc3-+)) 8...dc3 9.Bc1 Bd6 (9...Rb8 10.a3 Ba5 11.Rb1-+) 10.Nh4 Be6 11.Rb1 (11.Bb7 Rb8 12.Bg2 c5-+) 11...Bd5 (better is 11...Nc5 12.d4 ed4 13.Qd4-+) 12.f3 0-0 13.Be3 Ba2 14.Rb7 Nb6 15.f4 Bd5 16.fe5 Be5 17.Bd5 Nfd5 18.Bf4 Re8 19.e4 Nf6 20.Nf5 Nc8 21.Qc1 Nd7 22.Be3 Nd6 23.Rb4 Nf5 24.Rf5 Re6 25.d4 g6 26.Rf2 Bg7 27.d5 Re8 28.Bg5 f6 29.Be3 Qe7 30.Qa3 a5 31.Qb3 Qb4 32.d6 Qb3 33.cb3 cd6 (33...cd6 34.Bd4 Rac8-+) 0–1. Smalec,John – Key Smith,G, Plymouth ch–MI op, 1984.

5.Nh4!? Bg6 6.Ng6 hg6 7.e3 =.

5.c5 Ngf6 6.Nd4 Bb1 7.c6 bc6 8.Nc6 Qc8 9.Rb1 Qa6 10.Qc2 Nb8 (10...Qa2? 11.e4 a5 A) 12.ba5?! Ba3+/– (12...Ne4?? 13.Ra1 Qa1 14.Ba1+-); B) 12.Ra1 Qa1 13.Ba1 ab4 14.Bf6 Nf6 15.Bb5+-) 11.b5 Qa2 (11...Qb5? 12.Bf6 Qc5 13.Qc5 (13.Rb8? Rb8 14.Kd1 Qc2 15.Kc2 Rb6-+) 13...Bc5 14.Bg7+- (14.Rb8?! Rb8 15.Nb8 gf6+-)) 12.e3 Ba3 13.Nb4 Bb4 14.Ra1 Qa1 15.Ba1 Bd6 16.f4 Kd7 17.Bd3 Rc8 18.Qa4 Ke7 19.0-0 Nbd7 20.Bd4 Nc5 21.Qc2 Nd3 22.Qd3 c6 23.bc6 Rc6 24.Bf6 Kf6 25.Qh7 g6 26.g4 Rc7? (better is 26...Rc4+=) 27.f5+- gf5 (27...ef5 28.gf5 g5+-) 28.gf5 Rf8 (28...Ke7 29.fe6 Rf8 30.Rf7 Rf7 31.ef7 Rc6+-) 29.Qh4 Kg7 30.f6 Kg6 31.Qg4 Kh6 32.Rf3 Rc4 (32...Bh2 33.Kh2 Rfc8 34.Rh3) 33.Rh3 1–0. Kelly,Ladislau Endre (2170) – Erdos,Janos (2070), HUN–chT2 Toth, 2008. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 Nd7)

5.e3 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.Nbd2 e6 6.a3 a5 7.b5 Bc5 8.Nh4 Bf2 9.Kf2 Ng4 10.Kg3 Ne3 11.Qc1 Qg5 12.Kf3 Nf1 13.Rf1 Qh4 14.e4 Ne5 15.Ke2 Bg4 16.Nf3 Nf3 17.gf3 Qh2 18.Rf2 Bf3 19.Kf3 de4 20.de4 Qh3 21.Ke2 0-0-0 22.Qe3 Qh5 23.Qf3 Qb5 24.Ke3 Qb2 25.Raf1 Qc3 26.Kf4 Qf3 27.Kf3 h5 28.Ke3 f6 29.Rg1 Rdg8 30.Rg6 h4 31.Rh2 Kd7 32.c4 Ke7 33.Kd4 Kf7 34.Rgg2 g5 35.Rf2 g4 36.Rf4 g3 37.Rhh4 Rh4 38.Rh4 g2 39.Rh7 Rg7 40.Rh3 g1Q 41.Kc3 Rg3 42.Rg3 Qg3 43.Kd4 f5 44.ef5 ef5 45.a4 f4 46.Kc5 f3 47.Kb5 f2 48.Ka5 f1Q 49.c5 Qc3 0–1. Amun (1815) – Snoot_Booper (1635), lichess.org, 2019.

5.e3 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d3).

4.e3 (--> 3.e3 Nd7 4.Nf3).

4.e3 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.Nf3 Nd7).

(--> 3.e3 e6 4.Nf3 Nd7).

5.a3 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7).

5.c4 Ngf6 6.b5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Nbd7).

5.Be2 Ngf6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

5.Be2 Ngf6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7).

5.c4 dc4 6.Bc4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7).

5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.Be2 e6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

5.Be2 e6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

5.a3 A) 5...e6 6.g3 (6.Ng6 hg6 7.Nc3 Ngf6 8.e3 a5 9.b5 Nc5 10.d4 Nce4 11.Bd3) 6...a5 7.b5 Ngf6 8.Bg2 Bd6 9.0-0 0-0 10.Ng6 hg6 11.d3; B) 5...Ngf6 6.Nc3 (6.e3 a5 7.Nc3 e6 8.b5 Bh5 9.Be2 Be2 10.Qe2 Bd6 11.0-0; 6.Ng6 hg6 7.Nc3 e6 8.e3 a5 9.b5 Nc5 10.d4 Nce4 11.Bd3; 6.g3 a5 7.b5 e6 8.Bg2 Bd6 9.Nc3 Ne5 10.Ng6 hg6 11.0-0; 6.d3 e6 7.Nc3 a5 8.b5 Ne5 9.Ng6 hg6 10.e3 Nfg4 11.Na4) 6...e6 7.e3 a5 8.b5 Bh5 9.Be2 Be2 10.Qe2 Bd6 11.0-0; C) 5...a5 6.Nc3 (6.e3 Ngf6 7.Nc3 e6 8.b5 Bh5 9.Be2 Be2 10.Qe2 Bd6 11.0-0; 6.Ng6 hg6 7.e3 Ngf6 8.Nc3 e6 9.b5 Bd6 10.Be2 Nc5 11.g3; 6.b5 e6 7.Ng6 hg6 8.Nc3 Ngf6 9.e3 Be7 10.h3 0-0 11.d4; 6.g3 Ngf6 7.b5 Nc5 8.Bg2 e6 9.Bd4 Bd6 10.Nc3 Bh5 11.0-0) 6...Ngf6 7.e3 e6 8.b5 Bh5 9.Be2 Be2 10.Qe2 Ne5 11.d3; D) 5...Bh5 6.h3 (6.g3 Ngf6 7.Nc3 Ne5 8.d3 e6 9.Bg2 Bd6 10.0-0 a6 11.Qd2; 6.Nf3 Ngf6 7.Nc3 e5 8.d4 e4 9.Ne5 Bd6 10.g4 Bg4 11.Nd5; 6.Nc3 Ngf6 7.h3 Ne5 8.g4 Bg6 9.e3 a5 10.Na4 Qd6 11.Nc5) 6...e6 7.Nf3 a5 8.Nc3 Ngf6 9.b5 Bd6 10.g4 Bg6 11.Bg2.

5.Nc3 A) 5...Bh5 6.Nf3 (6.a3 Ngf6 7.h3 Ne5 8.g4 Nc4 9.Bc1 Bg6 10.d3 d4 11.Ng6; 6.Nf5 Ngf6 7.Ng3 Bg6 8.h4 h5 9.e3 e6 10.a3 a5 11.ba5; 6.g3 e6 7.Bg2 Ngf6 8.a3 a5 9.b5 Bd6 10.Nf3 0-0 11.0-0; 6.g4 Bg4 7.Rg1 Nh6 8.h3 e6 9.hg4 Qh4 10.Nb5 0-0-0 11.e3) 6...Ngf6 7.h3 e6 8.b5 Nc5 9.g4 Bg6 10.d3 Be7 11.Bg2; B) 5...Ngf6 6.e3 (6.Ng6 hg6 7.e3 e6 8.b5 Bb4 9.a3 Bd6 10.Be2 Nc5 11.g3; 6.a3 e6 7.e3 a5 8.b5 Bh5 9.Be2 Be2 10.Qe2 Bd6 11.0-0; 6.b5 Bh5 7.Nf3 e5 8.d4 Qe7 9.Qd2 e4 10.Nh4 Nb6 11.Nf5; 6.h3 e6 7.Ng6 hg6 8.a3 a5 9.ba5 Ra5 10.e3 c6 11.Be2) 6...e6 7.a3 a5 8.b5 Bd6 9.Be2 Nc5 10.0-0 0-0 11.Ng6; C) 5...e6 6.Ng6 (6.g3 Ngf6 7.b5 Ne5 8.e3 d4 9.Na4 Bh5 10.Be2 Be2 11.Qe2) 6...hg6 7.e4 c6 8.ed5 cd5 9.a3 Ngf6 10.h3 Bd6 11.Be2.

5.e3 A) 5...a5 6.Nc3 (6.ba5 Ra5 7.Be2 Ngf6 8.0-0 e6 9.Nc3 c6 10.f4 Bd6 11.a4; 6.Ng6 hg6 7.Nc3 Ngf6 8.b5 Nc5 9.Qf3 d4 10.Ne2 de3 11.de3; 6.b5 e6 7.Ng6 hg6 8.Nc3 Ngf6 9.Be2 Bb4 10.0-0 Nc5 11.h3) 6...ab4 7.Nb5 c6 8.Nd4 e6 9.g3 Ngf6 10.Be2 Bd6 11.0-0; B) 5...e6 6.Ng6 hg6 7.c4 Ngf6 8.Qb3 a5 9.a3 ab4 10.ab4 Ra1 11.Ba1; C) 5...e5 6.Ng6 hg6 7.c4 Ngf6 8.Nc3 dc4 9.Bc4 Nb6 10.Qb3 Nc4 11.Qc4; D) 5...Ngf6 6.Ng6 (6.c4 a5 7.Ng6 hg6 8.ba5 Ra5 9.cd5 Nd5 10.Nc3 e6 11.Rb1; 6.Be2 e6 7.a3 a5 8.b5 Bd6 9.Nc3 Nc5 10.0-0 Qe7 11.f4; 6.b5 Nc5 7.Be2 e6 8.0-0 Be7 9.Nc3 Qd6 10.Ng6 hg6 11.h3; 6.Nc3 e6 7.a3 a5 8.b5 Bh5 9.Be2 Be2 10.Qe2 Bd6 11.0-0) 6...hg6 7.c4 a5 8.ba5 Ra5 9.cd5 Nd5 10.Nc3 e6 11.Rb1.

5.Ng6= hg6 6.g3 (6.c4 Ngf6 7.e3 a5 8.b5 Nc5 9.Qc2 e6 10.Bd4 Qd6 11.cd5; 6.Nc3 Ngf6 7.e3 e6 8.b5 Bb4 9.a3 Bd6 10.Be2 Nc5 11.g3; 6.e3 Ngf6 7.c4 a5 8.b5 Nc5 9.Nc3 dc4 10.Bc4 Nd3 11.Bd3; 6.a3 Ngf6 7.e3 a5 8.Nc3 e6 9.b5 Nc5 10.d4 Nce4 11.Bd3) 6...e5 (6...Ngf6 7.e3 e6 8.b5 Nc5 9.a4 Be7 10.Bg2 a6 11.Nc3) 7.Bg2 c6 (7...Ngf6 8.c4 Bb4 9.cd5 Qe7 10.Qb3 Nc5 11.Qc4) 8.c4 (8.b5 Ngf6 9.Nc3 Nb6 10.bc6 bc6 11.d3) 8...dc4 (8...d4 9.b5 Ngf6 10.a4 Bd6 11.0-0) 9.Na3 Nb6 (9...a5 10.Nc4 ab4 11.0-0) 10.b5 (10.Rc1 Bb4 11.Nc4 Nc4 12.Rc4 Bd6+=) 10...Ba3=/+ (10...Qd7 11.bc6) 11.Ba3 cb5 12.Bb7 Rb8 13.Bc6 Nd7 14.Rb1 (14.Bg2 Ngf6+=) 14...Qc7 15.Bg2 Qb6 (15...Ne7 16.0-0+=) 16.0-0 (16.d3 a5 17.dc4 b4=) 16...g5 (16...a5!?= should be examined more closely) 17.d3+/= c3 18.Qc1 Qh6 (18...Rc8 19.Rb3 a5 20.Rc3 Rc3 21.Qc3+/–) 19.h3+/– a5 20.Qc3 b4 21.Qc7 (21.Qc2 Ne7 22.Bc1 Nf5+/–) 21...Qb6 (21...Ne7!? 22.Bc1 Qa6+/–) 22.Qb6+/– Nb6 23.Bb2 f6 24.Rfc1+- Kd7 25.Rc5 a4 26.Rb5 Ne7+/– 27.Rb4 Nbd5= 28.Ra4 Nc3 29.Ra7 Ke6 30.Bc3 Rb1 31.Kh2 Rc8 32.Ra3 Rc1 33.Ba5 R8c2=/+ 34.Bf3 Ra1 35.Bd8 Raa2 36.Rb3? Nc6-+ 37.Bb6 Rab2 38.Rb2 Rb2 39.Bc5 Nd4 40.Bd4 ed4 41.Kg2 f5 42.Kh2 Ke5 43.Kg2 Rb8 44.Kh2 ½–½. Boctor,Wageeh (2250) – Binkley,K (2075), US op Palo Alto, 1981.

4.a4 Bb4?? 5.Bg7 Nf6 6.Bh8 +-.

4.a4 Nf6+= 5.b5 Bc5 (5...Bd6 6.e3+=) 6.e3 0-0 (6...Bd6 7.Be2=) 7.Be2= Nbd7 8.0-0 c6 (8...Bg4 9.h3 Bf3 10.Bf3=) 9.Nh4 Bg6 (9...Be4 10.f3 Bg6 11.Ng6 fg6 12.Nc3=) 10.Ng6 fg6 11.d3 (11.Nc3 e5=) 11...Qc7 12.Bg4 (12.Nd2 a6=) 12...Rae8 13.Be2 (13.Ba3 e5=) 13...Bd6+= 14.g3 Nc5 (14...e5 15.c4+=) 15.Nd2 (15.f4 b6=) 15...e5 16.c4 e4 17.d4 Ne6 18.cd5 (18.Rc1 Qe7=) 18...cd5 19.Ba3 (19.Rc1 Qd7=) 19...Ba3 20.Ra3 Ng5 (20...Qa5 21.Qe1 b6 22.Nb3 Qe1 23.Re1=) 21.Kg2 (21.Ra1 Qe7=) 21...Qd7 (21...Rc8 22.a5=) 22.h4 (22.Rc3 Rc8 23.Rc8 Qc8=) 22...Qh3+= 23.Kg1 Ne6 (23...Nf7 24.Qb3+=) 24.Re1 (24.Rc3 g5 25.hg5 Ng5+=) 24...g5 25.Bf1 (25.hg5!? Ng5 26.Rc3+=) 25...Qf5-/+ 26.hg5 (26.Bg2!?-/+) 26...Ng4-+ (26...Qg5?! 27.Be2-/+) 27.f4? (better is 27.Re2 Nf2 28.Qb3-+) 27...ef3 28.Nf3 Qf3 29.Qf3 Rf3 0–1. TheWay – Wall,Bill, chess.com, 2007.

4.b5 Nd7 5.e3 h6 6.Be2 Ngf6 7.0-0 Bd6 8.d4 0-0 9.Nbd2 c5 (9...Ne4 10.c4=) 10.c4 Nb6 11.a4 Nc4 12.Nc4 dc4 13.Bc4 Qe7 14.Rc1 Bg4 15.h3 Bh5 16.Be2 Rfd8 17.Qb3 (17.dc5 Bc5 18.Qb3 Rac8=) 17...Ne4 (17...cd4 18.Nd4 Be2 19.Ne2=) 18.Rc2 (18.Qc2 f5=) 18...Rac8 (18...cd4 19.ed4 Rac8 20.Rfc1 Rc2 21.Rc2=+) 19.Rfc1 c4 (19...b6!?=) 20.Qa2 (20.Rc4 Rc4 21.Qc4 Qf6+-) 20...Bb4 (20...Qf6 21.Rc4 Rc4 22.Qc4 (22.Bc4? Bf3 23.gf3 Qf3-+; 22.Rc4?! Bf3 23.Bf3 Nd2+=) 22...Bf3 23.Bf3+- (worse 23.gf3 Qg6 24.Kf1 Bh2 25.Bd1 Qg1 26.Ke2 Qf2 27.Kd3 Qd2 28.Ke4 f5)) 21.Rc4+- Rc4 22.Qc4 (22.Bc4 Bf3 23.gf3 Qg5 24.Kf1 Nd2 25.Ke2 Qh5-+ (25...Nc4 26.Qc4 Bd6 27.d5+=)) 22...Bf3 23.Bf3 (worse 23.gf3 Qg5 24.Kh2 Bd6 25.f4 Qh4-/+ (25...Nf2?! 26.Qc3=)) 23...Nd2 24.Qe2 Qd6? (24...Nf3 25.Qf3 Bd6 26.e4+-) 25.Rc2 (better 25.Bb7!? Nb3 26.Rc2+-) 25...Nf3+- 26.Qf3 (worse 26.gf3 Qd5+=) 26...a6 (26...Qd7 27.Qf4 Bd6 28.Qg4+-) 27.ba6 (27.Qb7 ab5 28.ab5 Qd5+-) 27...ba6 28.Qc6 (28.Rc6!? Qb8+-) 28...Qc6 29.Rc6 a5 30.Kf1 Rb8 31.Bc3 (31.e4 Bf8 32.Bc3 Bb4+-) 31...Bc3 32.Rc3 Rb4 33.Ra3 Rb2 34.Ra1 f5 35.g4 g6 (35...f4 36.ef4 Rd2 37.Kg2+=) 36.Ke1 Kf7 37.Ra3 fg4 38.hg4 h5 39.gh5 gh5 40.e4 (better 40.Kf1!?+=) 40...Rb4=+ 41.f3 Rd4 42.Kf2 h4 43.Kg2 (43.Ke3 e5=+) 43...Kf6-/+ 44.Kh3 Kg5 45.Ra1 e5 46.Ra3 Rb4 (46...Rd1 47.Kh2-+) 47.Rd3-/+ Ra4 48.Rd5?? (better 48.Rd8-/+) 48...Kf4-+ 49.Kh4 Ra1 (better 49...Kf3!? 50.Kg5 Ke4 51.Rb5-+) 50.Kh5 a4 51.Kg6 Ra3 52.Ra5 Rf3 53.Ra4 Re3 54.Kf6 Re4 55.Ra1 Re2 56.Rf1 Ke4 57.Ke6 Re3 58.Rd1 Kf3 59.Rf1 Ke2 (59...Kg4 60.Kd5 Re2 61.Rf7-+) 60.Rf5 (60.Ra1 Kf2 61.Kf5=) 60...e4 61.Ke5 Kd3 62.Rf1 (62.Rf7 Rh3 63.Rd7 Ke3 64.Kd5-+) 62...Rf3?? (better 62...Rh3-+) 63.Rd1= Ke2 64.Ke4 ½–½. Andrade,Leo Pasqualini De – Juliano,J C Mazzini, Circuito Catarinense Aberto 2h K, 2009.

4.b5 Be7?? 5.Bg7+- Bf6 6.Bh8 Bh8 7.c3 Nd7 8.e3 Nc5 9.d4 Ne4 10.Bd3 Ngf6 11.Ne5 Qd6 12.f3 Ng5 13.h4 Nf3 (13...Nge4 14.g4 Ng4 15.fe4 (15.Ng4 Qg3 16.Kf1 Bg4 17.Be4 Bh3 18.Ke2 de4-/+) 15...Be5 16.de5+-) 14.Qf3 (14.Nf3?! Qg3 15.Kd2 Qg2 16.Be2 Ne4 17.Kc1 Qf2+-) 14...0-0-0 (14...Bd3 15.Nd3 a6+-) 15.Bf5 ef5 16.Nf7 Re8 (16...Qe6 17.Nd8 Kd8+-) 17.Nd6 (17…cd6 18.Qf5 Kc7 19.g4 Re3 20.Kd1+-) 1–0. Bonetti,Shane – colang, ICC, 2002.

4.Nc3 Nf6 5.b5 Bd6 6.e3 0-0 7.Be2 a6 8.Nh4 ab5 9.Nb5 Nc6 10.Nd6 Qd6 11.Bf6 gf6 12.Nf5 ef5 13.Bd3 Qe5 14.0-0 Nb4 15.Be2 Ra7 16.c3 Nc6 17.d4 Qe6 18.c4 Re8 19.cd5 Qd5 20.Qc2 Qa5 21.Bc4 Rd8 22.Qe2 Qb4 23.Bd3 Qa5 24.Qh5 Ne7 25.Rfc1 Qb6 26.Bf5 Nf5 27.Qf5 Qd6 28.Rc2 Rd7 29.Rb1 c6 30.Qg4 Kh8 31.Rb6 Qe6 32.Qe2 f5 33.g3 Kg8 34.Rcb2 Qe8 35.Qh5 Qe4 36.Qg5 Kf8 37.Qf6 Kg8 38.h3 Qe6 39.Qg5 Kf8 40.Qf4 Kg7 41.Qb8 Ra2 42.Ra2 Qa2 43.Rb7 Rb7 44.Qb7 Qd5 45.Qe7 h6 46.h4 Qe4 47.Qc5 Qd5 48.Qd5 cd5 49.Kg2 Kf6 50.Kf3 Kg6 51.Ke2 f6 52.Kd3 Kh5? 53.f3 Kg6 54.Kc3 f4 55.ef4 Kf7 56.Kb4 Ke7 57.Kc5 Ke6 58.g4 Kf7 59.Kd5 h5 60.gh5 Kg7 61.Ke4 Kh6 62.d5 f5 63.Kf5 Kh5 64.d6 Kh4 65.d7 Kg3 66.Ke4 Kf2 67.d8Q Ke2 68.Qh8 Ke1 69.Qh2 Kd1 70.Kd3 Ke1 71.Qg1# 1–0. GLChess211 – Faile14, computer chess game, 2000.

4.c4 dc4 5.e3 Bd3-/+ (5...Bb4?? 6.Bg7 Bd3 7.Qa4 Nc6 8.Bh8+-) 6.Qa4 c6 7.Ne5 (7.Bd3!? Qd3 8.b5-/+) 7...Bf1-+ 8.Rf1 b5 (8...f6 9.Nf3 b5 10.Qd1-+) 9.Qc2 (9.Qd1 Nf6 (9...Bb4?! 10.Nc6 Nc6 11.Bg7=) 10.a3 a5 11.ba5 Ra5-+) 9...Nf6 (9...f6 10.Nf3-+) 10.Na3 (better 10.a3!?-+) 10...Bb4 11.Rd1 Qe7 12.Nb1 0-0 13.Ke2 Rd8 (13...Nd5 14.d3 f6 15.dc4 fe5 16.cd5 ed5 17.a3-+) 14.a3 (14.d3 cd3 15.Rd3 Nd5-+) 14...Ba5 (14...Bd6 15.d3 cd3 16.Rd3-+) 15.h3 (15.d3 cd3 16.Rd3 c5-+) 15...h6 (15...Nfd7 16.Qe4-+) 16.g4 (16.d3 cd3 17.Rd3 Rd3 18.Nd3 Nfd7-+) 16...Bc7 17.d4 Nfd7 18.f4 f6 (18...Ne5!? 19.fe5 c5 20.a4-+) 19.Ng6 Qf7 20.Nh4 Nf8 21.Nc3 Nbd7 (21...a5 22.Ne4-+) 22.Qe4 a6 23.Qc6 Rdc8 (23...Ba5 24.Rc1-+) 24.Qb7 Nb6 25.Qf3 Nd5 (25...Qe7 26.f5-+) 26.f5 (26.g5 fg5 27.fg5 Qf3 28.Nf3 Rab8-/+) 26...Nc3-+ 27.Bc3 Bd6 28.Bb2 c3 (28...a5 29.fe6 Ne6 30.Nf5-+) 29.Bc1 (better 29.Bc3!? Ba3 30.Ba5-+) 29...e5 30.Kf2 Ra7 (30...ed4 31.Kg1-+) 31.d5 a5 32.e4 b4 33.Rd3 Rac7 34.ab4 ab4 0-1. zembelek (2070) - kabalist (2340), Rated Blitz game, lichess.org, 2014.

4.Ne5 Nf6 5.e4 (5.a3 a5=+) 5...Be4-/+ 6.d3 (6.f3 Bf5-/+) 6...Bg6 (6...Bb4 7.c3 Bd6 8.Nf7 Kf7 9.de4 Ne4 10.Bd3-+) 7.Qf3 (7.a3 c5-/+) 7...Bd6 (7...Bb4!? 8.c3 Bd6 9.Ng6 hg6 10.Nd2-+) 8.Ng6 fg6 (8...hg6 9.a3-/+) 9.Bf6 (9.a3 0-0 10.Qh3 e5-/+) 9...gf6 (9...Qf6 10.Qf6 gf6 11.a3-+) 10.Be2 (10.a3 Nc6-/+) 10...0-0 (10...Bb4 11.c3 Bd6 12.Nd2-/+) 11.Qh3 (11.c3 c6-/+) 11...Be5 12.Qg4?? Ba1 13.Nd2 f5 14.Qg3 Bf6 15.Bg4 fg4 16.Qg4 Nd7 17.Qf5 Qe7 18.Qf3 Ne5 19.Qe2 Nd3 20.Kd1 Qc5 21.cd3?? Qc2 22.Ke1 Qd1 23.Qd1 Ba1 24.f3 Rf3 25.Rf1 Rf2?? 26.Rf2+- Rf8 27.Rf8 Kf8 28.Qa4 Kg7 29.Qd7 Kf6 30.Qc7 Be5 31.Qb7 d4 32.Qa7 Bb8 33.Qb8 e5 34.Qb7 e4 35.Qb6 Kf7 36.Ne4 g5 37.Qf6 Ke8 38.Qg5 h6 39.Qh6 Kd7 40.Qh7 Ke6 41.Nc5 Kd5 42.g4 Kc6 43.Qf5 (43…Kd6 44.Qe6 Kc7 45.Qd7 Kb6 46.Qb7; 43.Qd7 Kb6 44.Qb7) 1–0. opop – AliG1Only, Caissa's Web, 2004.

4.h3 Bb4?? 5.Bg7 Nf6 6.Bh8 +-.

4.Nh4 Qh4 5.e3 Bg4 6.Be2 Be2 7.Qe2 Qc4 (7...Nd7 8.Na3-+) 8.a3 (8.Qc4 dc4 9.Na3 Nc6-+) 8...Qe2 (8...Qc2!? 9.d3 Qe2 10.Ke2-+) 9.Ke2 Nf6 10.h4 Nc6 11.d3 0-0-0 12.c4 (12.h5 Be7-+) 12...dc4 13.dc4 b6 14.Nd2 1–0. Darkseid (1670) – Willie Karloff (1645), ChessWorld.net, 2007. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6 4.Nh4 Qh4)

5.b5 a4 6.e3 c5 7.bc6 bc6 8.c4 h6 9.Qc1 Nd7 (9...Nf6!?=) 10.Nd4+= Bb1 11.Rb1 Qc7? (better is 11...Rc8+=) 12.cd5+- Rb8? (12...ed5 13.Nb5! Qc8 14.Bg7 Rh7 15.Bf8 Kf8+-) 13.Nb5! (worse is 13.de6 Nc5 14.ef7 Kf7 15.Bc4 Ke8+-; 13.dc6?! Nc5+-; 13.Nc6?! Rb6+-; worse is 13.Qc6 Qc6 14.dc6 Nc5+-) 13...Qc8 (13...Rb5 14.Qc6 Double attack (14.Qc6 Decoy); 13...cb5 14.Qc7 Pinning (14.Qc7 Deflection)) 14.dc6 (14.Qc6?! ed5 15.Qd5 Ngf6 16.Bf6 Nf6 17.Qe5 Kd8 18.Qd4 Qd7 19.Qa4 Bd6+-) 14...Nb6 (14...f6 15.cd7 Qd7 16.Qc4+-) 15.Bg7! Rh7 (15...Bg7 16.Nd6 Double attack) 16.c7 Rb7 17.Qc6 (17.Qc6 Nd7 18.Bd4 Ba3 19.Bd3+-) 1–0. pcmvr – dixsept (2290), net–chess.com, 2016.

5.b5 c5 6.a4 Nf6 7.e3 Be7 8.c4 (8.Bd3 0-0=) 8...Nbd7=+ 9.d4 (9.Be2 Nb6=+) 9...dc4 (9...cd4 10.Bd4 Bb4 11.Nc3-+) 10.Bc4=+ 0-0 11.0-0 b6 12.Nc3 White intends d5 12...Rc8 13.d5 ed5 14.Nd5 Nd5 15.Bd5 Bf6 16.Bf6 Nf6 17.Bc6 Be4 18.Be4 Ne4 19.Qc2 Qe7 20.Rad1 Rfd8 21.Nd2 Nd2 22.Rd2 Rd2 23.Qd2 Rd8 24.Qc2 Qd6 25.h3 Qd2 26.Qc4 Qb4 27.Qb4?? (better 27.Qc2=+) 27...ab4-+ (27...cb4 28.Rc1 g5 29.Kf1-/+) 28.Ra1 (28.f4-+) 28...Ra8 (better 28...b3 29.Rb1 c4-+) 29.Kf1 b3 (better 29...Kf8!? 30.Ke2 c4-+) 30.Ke2 c4 (30...f5!? 31.Kd3 b2=+) 31.Kd2= Kf8 32.Kc3 Ke7 33.Kc4 b2 34.Rb1 Ra4 35.Kd5 (35.Kc3=) 35...Kd7?? (better 35...Rb4-/+) 36.Rb2+= Ra1 37.g3 Rd1 38.Ke4 Kd6? (38...Rc1 39.Kd3+=) 39.h4 (39.Rc2 Rb1 40.Rc6 Kd7 41.Rb6 Kc7 42.Rc6 Kb7+-) 39...Kc5 (39...Rd5 40.Kf4+=) 40.f4 (40.Rc2!? Kb5 41.Rc7 Ka6 42.Rf7 b5 43.Rg7 b4+/-) 40...Rg1 (40...g6 41.f5=) 41.Kf3+= Rd1? (41...f5 42.Rc2 Kb5 43.Rc7+/-) 42.e4 (better 42.Rc2!? Kb5 43.Rc7+-) 42...Rd3+= 43.Kg4 h5 44.Kh5 Rg3 45.e5 g6 46.Kh6 Rg4 47.h5 gh5 (47...Rf4 48.hg6 fg6 49.Re2+-) 48.Kh5 Rf4 49.Re2 Kb5 50.e6? (better 50.Kg5 Rf1 51.Rb2 Kc5 52.Rc2 Kd5 53.Rb2=+) 50...fe6-+ 51.Re6 Kc5 52.Kg5 Rf1 0-1. ozo (2110) - zenpath (2135), Rated Blitz game, lichess.org, 2015. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4 Bf5 3.Bb2 e6 4.a3)

5.b5 Nf6 6.e3 Nbd7 7.Be2 Bd6 8.Nh4 Bg6 9.f4 c5 10.0-0 Nb6 11.d3 d4 12.e4 Nh5 13.Ng6 (< 13.Bh5 Qh4 14.Bg4 h5-/+) 13...hg6 14.Bc1 Qh4 (14...e5 15.Bh5 Rh5 16.h3=) 15.e5 Nd5 16.Bh5 Be7 (16...Rh5 17.ed6 Qh2 18.Kf2 Nf4 19.Bf4=) 17.Bf3+= Qh2 18.Kf2 Nf4 19.Bf4 Qf4 20.Rg1 Qe5 21.Bb7+/– Rh5 22.Nd2 Bh4 23.g3 Qe3 24.Kf1 Bg3 25.Qe2 Qf4 26.Qf3 Qd2 27.Qc6 Ke7 28.Rg3 Rd8 29.Qg2 (not finished). Klaus Behrmann – ARMAGEDON_8, ChessWorld.net, 2003.

5.Nd4 Bg6 6.b5 Nf6 7.e3 Bc5 8.d3 c6 9.bc6 Nc6 10.Nc6 bc6 11.Nd2 0-0 12.Be2 Bd6 13.Rb1 Rb8 14.0-0 Qe7 15.Qc1 e5 16.Nf3 Bf5 17.Nh4 Bd7 18.Nf3 e4 19.de4 de4 20.Nd2 Be5 21.Be5 Qe5 22.Nc4 Qc3 23.Rd1 Be6 24.Rb3 Rb3 25.cb3 Qc1 26.Rc1 Ra8 27.a4 c5 28.Rc2 Ra7 29.Rd2 Nd7 30.Ne5 Nf8 31.Nc6 Ra8 32.Bd1 f6 33.Bc2 f5 34.g4 g6 35.Rd6 Kf7 36.gf5 gf5 37.f3 ef3 38.Kf2 Kg7 39.Kf3 Ra6 40.Kf4 Bd7 41.Rd7 Nd7 42.Ne7 Rb6 43.Nf5 Kf8 44.e4 Rb4 45.Ne3 Nb6 46.h4 Ke7 47.Bd1 Kd7 48.Bc2 Ke6 49.Bd1 Kd7 50.Bc2 Ke6 51.Bd1 Kf7 52.h5 Kf6 53.Bc2 Kf7 54.Bd1 Kf6 55.Bc2 Rd4 56.Ng4 Ke6 57.Ne3 h6 58.Nf5 Rd2 59.Ne3 Nd7 60.Bd1 Ne5 61.Bg4 Ng4 62.Ng4 Rb2 63.Nh6 Rb3 64.Ng4 Rh3 65.Ne3 Rh5 66.Nc4 Rh4 67.Ke3 Rh3 68.Kf4 Rh4 69.Ke3 Rh8 70.Na5 Rb8 71.Kd3 Rb4 72.Nc4 Ra4 73.Kc3 Ra7 74.Nb2 Ke5 75.Nd3 Ke4 76.Nc5 Kd5 77.Nb3 Rg7 78.Na5 Rg2 79.Nb3 Rg3 80.Kb4 Rh3 81.Na5 Rh2 82.Kc3 Rg2 83.Nb3 Rg3 84.Kb4 Rh3 85.Na5 Rh2 86.Kc3 Rh4 87.Nb3 Rh3 88.Kb4 Rg3 89.Na5 Rg7 90.Kc3 Rg3 91.Kb4 Rg7 92.Kc3 ½–½. Machete99 – Ravana, ICC, 2002.

5.Nd4 Bg6 6.b5 Nf6 7.e3 Bc5 8.Be2 0-0 9.0-0 Nbd7 10.c4 dc4 11.Bc4 Nb6 12.Be2 Nbd5 13.Nb3 Bd6 14.Nc3 a4 15.Nd4 e5 16.Nd5 Nd5 17.Nf3 e4 18.Ne5 Be5 19.Be5 Bf5 20.Rc1 Qe7 21.Bb2 Rfd8 22.Re1 Qd7 23.Qc2 Ra7 24.Qc4 Ra5 25.Qd4 f6 26.Rc5 Ne3 27.de3 Qc8 28.Qc3 b6 29.Rc7 Qe6 30.Bc4 Rd5 31.Bd5 Rb5 32.Be6 Be6 33.Rg7 Kh8 34.Qf6 Rf5 35.Rg6 Rf6 36.Bf6# 1–0. Machete99 (2165) – Ravana (2090), ICC, 2002.

5.bc5 Qa5 6.e3 Qc5= 7.Nc3 a6 (7...Nc6 8.Nh4=) 8.d4 (8.Nh4 Nh6+=) 8...Qc8 9.Bd3 Bd3 10.Qd3 Nf6 11.0-0 Nbd7 12.Rfe1 Bd6 13.h3 (13.e4 de4 14.Ne4 Ne4 15.Qe4 Nf6+=) 13...Nb6 14.Ne2 (14.e4!? de4 15.Ne4 Ne4 16.Qe4=) 14...0-0 15.Rac1 (15.Nc3 Qc6+=) 15...Nc4-/+ 16.Qb3 b5 17.a4 (17.Ra1 Rb8-+) 17...Rb8 18.Qa2 ba4 19.Ba1 a3 20.c3 (20.Ne5-+) 20...Qc7 21.Rb1 Rb1 22.Rb1 Rb8 23.Nc1 Rb1 24.Qb1 Ne4 25.Nd3 Ned2 26.Nd2 Nd2 27.Qc2 Nc4 28.Nb4 (28.Ne1 Qb7-+) 28...a5 (28...Ne3 29.fe3 Bb4 30.e4-+) 29.Nd3 f6 30.Qa4 Kf7 31.Qb3 Qb6 32.Qb6 Nb6 33.Kf1 Nc4 34.Ke1 Ke7 35.Kd1 Kd7 36.Kc2 Kc6 37.Kb3 Kb5 38.g3 a4 39.Kc2 g6 40.h4 h6 41.Nf4 (41.g4-+) 41...Bf4 42.ef4 e5 (better is 42...Na5-+) 43.fe5 fe5 44.de5 Ne5 45.Kd2 (45.f4 Nc4-+) 45...Kc4 (45...h5!? 46.c4 Nc4 47.Kc2-+) 46.f4 Nd3 47.Kc2 (47.h5 gh5 48.f5 Nf2-+) 47...Ne1 (better is 47...a2 48.h5 a3 49.hg6 Nc5-+) 48.Kb1 (48.Kd1 Nf3 49.h5 gh5-+) 48...Nf3 (better is 48...Kb3 49.Kc1 Nc2-+) 49.Ka2 Nd2?? (49...h5 50.Ka3 Kb5 51.Bb2-+) 50.Ka3? Nb3?? 51.Bb2? Nc5?? 52.Bc1?? Nd3?? 53.Be3?? Kc3 54.Ka4? d4-+ 55.Bg1 Nb2 56.Kb5 d3 57.Be3 Nc4 58.f5 gf5 59.Bh6 d2?? 60.Bd2= Nd2 61.h5 Ne4 62.h6 Ng5 63.Kc5 Kd3 64.Kd5 Ke3 65.Ke5 Kf3?? 66.Kf5+- Nh7 67.g4 1–0. Fournier,Frederic (1980) – NN, jeu.europe–echecs.com, 2013. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6)

5.bc5 Bc5?? 6.Bg7+- Qb6 7.e3 f6 8.Nc3 (8...Qd6 9.Bh8+-) 1–0. pcmvr (2225) – tirpitz (2085), net–chess.com, 2006.

5.bc5 Nf6 6.d4 b6 =.

5.Nc3 Nf6 6.e3 Na6 (Better is 6...Bd6!?=) 7.Ba6-/+ ba6 8.Nd4 Qc7 9.Nf5 ef5 10.Ne2 a5 11.Bf6 gf6 12.c3 Bg7 (12...ab4 13.ab4 Rg8 14.0-0+-) 13.Nd4 Rg8 14.Qa4 Rc8 15.Nf5 h5 16.0-0 h4 17.Nh4 Rh8 18.b5 Rh4 19.Qh4 Ke7 20.bc6 Rh8 21.Qg3 Qc6 22.Qg7 Rh5 23.Qg4 Rg5 24.Qf3 f5 25.Rab1 f6 26.Rb8 Qc7 27.Rfb1 Qc4 28.h4! 1–0. market (1760) – mopna, GameColony.com, 2002.

5.e3 Nd7 6.c4 dc4 7.Bc4 b5 8.Be2 a5 9.Nc3 (9.0-0 ab4 10.ab4 A) 10...Bb4?? 11.Ra8 (11.Bg7?! Ra1 12.Ba1 Ndf6+=) 11...Qa8 12.Bg7+-; B) 10...Ra1 11.Ba1 Ngf6= (11...Bb4 12.Bg7 Bd6 13.Bh8+-)) 9...ab4 10.ab4 Ra1 (10...e5 11.e4 Bg4 12.Na2=) 11.Qa1 Bb4 (11...e5=) 12.Nd4 (better is 12.Nd5! ed5 13.Bg7+-) 12...Ne7+= 13.0-0 (13.Nf5 Nf5 14.Ne4 Rg8+=) 13...0-0 14.Nf5 Nf5 (worse is 14...ef5 15.Na2 Bd6 16.Bg7+/–) 15.Qb1 Bc3 (15...Bd6 16.Ne4 Qc7 17.Nd6 Qd6 18.d4+=) 16.Bc3 f6 (better is 16...Qg5+=) 17.Qe4+/– Qe7 (17...Ne5 18.Be5 fe5 19.Qc6+/–) 18.Qc6 Nc5?? (better is 18...Rb8 19.Bb5 Nf8+/–) 19.Bb4+- (19.Bb5?! Qd6+/–; 19.Qb5?! Rc8+-) 19...Qb7 20.Qc5 Rc8 21.Qb5 Qe4 22.d4 Nh4 23.Bf3! Nf3 24.gf3 Qf3 25.Bd6 h6 26.Bg3 h5 27.Qd7 Rc6 28.h4 e5 29.d5 Rc4 30.Ra1 Kh7 31.Qf7 Rc5 32.d6 Rd5 33.d7 Ra5 34.Ra5 (34.Ra5 Qd1 35.Kg2 f5 36.Qf5 g6 37.Qf7 Kh6 38.Re5 Qh1 39.Kh1 g5 40.hg5#) 1–0. Olsen,Rolf – Larsen,Helge, Finnmark–ch, 2005.

5.e3 Nd7 6.c4 dc4 7.Bc4 Ngf6 8.0-0 Be7 9.Nh4 Bg6 10.f4 Bh5 11.Nf3 Nb6 12.Bb3 0-0 13.Nc3 Qc7 14.Rc1 Rad8 15.Nb5 Qb8 16.Be5 Qc8 17.Bd4 Nbd5 18.Bd5 Nd5 19.Qb3 (19.Na7 Qa8 20.Qa4 b6+=) 19...Qd7 (19...a6!? 20.Na7 Qa8-/+) 20.Ne5+= Qe8 21.Na7 f6 22.Nec6 bc6 23.Nc6 The passed pawn on b4 will quickly become a dangerous weapon 23...Rc8? (better is 23...Rd6!? 24.Ne7 Ne7+=) 24.Ne7+/– Qe7 25.Bc5 Qb7 26.Bf8 Kf8 27.Rc8 Qc8 28.e4 Ne7 29.d4 Qc6 30.Re1 Bg6 31.b5 Qb6 32.Qb4 Be8 (32...Qb7 33.e5 Kf7+-) 33.a4 Kf7 34.Rc1 f5 (34...Qb8 35.Qd2+-) 35.ef5 Nf5 (35...ef5 36.Re1 Qd8 37.a5+-) 36.Rc5 (better is 36.Qc5 Qc5 37.dc5 Nd4+-) 36...Ne7 37.a5 Qb8 38.Qc4 Qf4 39.Qf1 Qf1 40.Kf1 Nf5 (40...Nd5+-) 41.b6 Nd6 42.b7! Nb7 43.Rc7 Theme: Double Attack 43...Kf6 44.Rb7 Bc6 45.a6 Bd5 46.Kf2 h5 (46...Bc6 47.Rb6 Ba8 48.a7+-) 47.Rd7 Bc6 48.Rd6 Ba8 49.Rd8 Bc6 (49...Be4 50.d5! ed5 51.Rf8 Ke7 52.Rf4+-) 50.a7 (50.a7 Kf5 51.Ke3+-; better is 50.d5 Bd5 51.Rd5 ed5+-) 1–0. Streit,Bodo – Feige,Detlef, Germany, 2006.

5.g3 a5 6.ba5 Qa5 7.Bg2 Nf6 8.0-0 Nbd7 9.d3 h6 (9...Qb6 10.Ra2+=) 10.Nbd2= Be7 11.c4 0-0 12.Qc2 Qa4 13.Rfc1 Qc2 14.Rc2 Bh7 15.a4 Ne8 16.Ne5 Ne5 17.Be5 Bf6 18.Bf6 Nf6 19.Rb2 Ra7 20.Rab1 Rb8 21.a5 g5 22.cd5 ed5 23.Nb3 Bf5 24.Nd4 Bd7 25.h4 (25.h3 c5 26.Nb3 c4=) 25...Kg7 (25...Ra5!? 26.Rb6 Kg7+=) 26.hg5= hg5 27.f4 gf4 28.gf4 Ra5 29.Rb7 Rb7 30.Rb7 Ra4 31.Nb3 Rf4 (31...Bg4 32.Nc5 Ra5 33.Nb3+=) 32.Nc5 (32.e4 Rg4 33.e5 Nh5 34.Rd7 Nf4+=) 32...Bg4 (32...Bf5 33.Rb6+=) 33.Rc7 Rf5 (33...Rb4 34.Kf2+=) 34.Ne6= Kg6 35.Nd4 Rg5 36.Kf2 (36.Rc6? Bh3 37.Kh2 Bg2-+ (37...Rg2?! 38.Kh3 Rg5 39.Nf3=)) 36...Bd7 37.Bf3 Re5 38.Nc6 Bc6 39.Rc6 Kf5 40.Rc7 Ke6 41.Ra7 Rg5 42.Ra6 Ke7 43.Ke3 Ne8 44.Kd4 Nc7= 45.Rb6 Kd7 46.Ke3 Ne6 47.Kf2 Kc7 48.Ra6 d4 49.Ra7 Kd6 50.Rf7 Ra5 51.Rh7 Rf5 52.Rh6 Ke5 53.Ke1 Rg5 54.Kd2 Nf4 55.Rh8 Ne6 56.Re8 Kd6+= 57.Be4 Kd7 58.Ra8 Kd6 59.Ra6 Ke7 60.Ra7 Kf6 61.Ra6 Ke7 62.e3 de3 63.Ke3 Rh5 64.Bf3 Re5 65.Kd2 Nd4 66.Ra7 Kd6 67.Ra6 Kc7 68.Be4+/– Nb3 69.Kc3 Nc5 70.Ra7 Kb6 71.Rg7 Ne4= 72.Kd4 Rg5 73.Re7 Nd6+= 74.Re6 Kc6 75.Ke3 Rg4 76.Rh6 Rg5 77.d4 Rd5 78.Kd3 Kd7 79.Ke3 Kc7 80.Kf4 Kc6 81.Ke3 Kd7 82.Kf4 Rd4-/+ 83.Ke5 Rd1 84.Rh7 Kc6 85.Rh6 Re1 86.Kd4 Re4 87.Kd3 Rg4 88.Ke3 Ra4 89.Kd3 Kd5 90.Rh5 Ke6 91.Rh6 Ke5 92.Rh5 Nf5 93.Rh8 Rd4 94.Kc3 Rg4 95.Re8 Kf4 96.Rf8 Rg3 97.Kc4 Re3 98.Kd5 Rd3 99.Kc4 Rd7 100.Rf6 Ke5 101.Rf8 Ne3 102.Kc3 Nd5 103.Kd3 Nf6 104.Ke3 Kf5 105.Ra8 Re7 106.Kf3 Re5 107.Ra6 Ng4 108.Ra8 Re3 109.Kg2 Kg5 110.Rg8 Kf4 111.Rf8 Kg5 112.Rg8 Kf5 113.Rf8 Nf6 114.Kf2 Ra3 115.Ke2 Ke5 116.Rb8 Nd5 117.Re8 Kd4 118.Kf2 Nf4 119.Rf8 Ne6 120.Re8 Ke5 121.Ke2 Kf5 122.Kf2 Ng5 123.Rf8 Kg4 124.Ke2 Ne4 125.Re8 Kf4 126.Rf8 Ke5 127.Re8 Kd5 128.Rd8 Nd6 129.Kf2 Rb3 130.Ke2 Rh3 131.Kf2 Ke5 132.Kg2 Rb3 ½–½. Coenen,Michael (2170) – Rezasade,Amir (2230), GER–ch Net qual2 U25 blitz, 2008. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6 4.a3 c6)

5.e3 a6 6.Be2 h6 7.d3 Nf6 8.0-0 Be7 9.Nbd2 0-0 10.Rc1 Bd6 11.c4 dc4 12.Nc4 Rb8? (Better is 12...Be7+=) 13.e4+- (13.Nd6?! cd6 14.Nd4 Nd4 15.Bd4 e5+=) 13...Bg4 14.e5 (14.Nd6?! cd6 15.Nd4 Be2 16.Qe2 Nd4 17.Bd4 e5+=) 14...Bf3 15.Bf3 Be7 16.Bc6 bc6 17.ef6 Bf6 18.Bf6 Qf6 19.Na5 e5 20.Rc6 Qe7 21.Qc2 Rfd8 22.Rc5 Rb6 23.Nc6 Rc6 24.Rc6 Rd7 25.Ra6 Qd8 26.Ra7 e4 27.de4 Qc8 28.Rc1 Qd8 29.Rc7 Rd6 30.Rc8 Qc8 31.Qc8 Kh7 32.Qf5 1–0. COMP – NN, 2003.

5.e3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nc6).

5.d4 c6 6.e3 b5 7.Bd3 Bg6 8.0-0 f5 9.Nbd2 Ngf6 10.Nb3 Be7 11.Ng5 Bf7 12.Nc5 Nc5 13.bc5 h6 14.Nf3 Bh5 15.a4 a6 16.ab5 ab5 17.Be2 Nd7 18.Ne1 Be2 19.Qe2 Kf7 20.Nd3 Qc7 21.Ra8 (better is 21.Qh5!? g6 22.Ra8 gh5 23.Rh8+=) 21...Ra8= 22.Qh5 Kg8 23.Nf4 Nf8 24.Ra1 Ra1 25.Ba1 Qd7 26.g3 Bd8 27.Bc3 Qf7 28.Qd1 Qa7 29.Nd3 Ng6 30.h4 Bf6 31.Qd2 Bd8 32.Qe1 Nf8 33.Ne5 Qa8 34.Qa1 Qb7 35.Ba5 Bf6 36.Nd3 Nd7 37.Bb6 Nb6 38.cb6+/– Bd8 39.Qa7 Qb6 40.Qb6?? Bb6= 41.Ne5 Bc7 42.Nc6 Kf7 43.Kf1 Ke8 44.Ke2 Kd7 45.Nb4 g5 46.hg5 hg5 47.Nd3 g4 48.Kd2 Bd6 49.Kc3 Kc6 50.Kb3 Kb6 51.Ne1 Ka5 Black prepares the advance b4 52.Ng2 Bb4 53.c3 Bd6= 54.Ne1 b4 55.Nd3 bc3 56.Kc3 Kb5 57.Kd2 Bb4 58.Ke2 Bd6 59.Ne1 Kc4 60.Ng2 Kb5 61.Nh4 Kc6 62.Ng6 Kd7 63.Kd3 Ke8 64.Kc3 Kf7 65.Nf4 Ke7 66.Nd3 Ba3 67.Kb3 Bd6 68.Ka4 Kf6 69.Kb5 Ba3 70.Kc6 Ke7 71.Kb5 Kd6?? 72.Ka4+- Bb2 73.Nb2 e5 74.Nd3 ed4 75.ed4 Ke6 76.Kb5 f4 77.Kc5 f3 78.Nf4 Kf5 79.Kd5 (79.Kd5 Kf6 80.Kc6 Kg5 81.d5 Kh6 82.d6 Kg7 83.d7 Kh7 84.d8Q Kg7 85.Qe7 Kg8 86.Nh5 Kh8 87.Qg7) 1–0. Bernacki,Gabriel (1880) – Wasiluk,Robert, open tournament Poland, 2007.

5.d4 Bd6 6.Nbd2 b5 7.Ne5 f6 (7...a6 8.g4 Bg6 9.h4 Be5 10.de5=) 8.Nef3 (8.Nc6 Qc8+=) 8...e5 (8...a5!?=+) 9.Nh4 Be6 10.e4 g6 (Better is 10...a5!? 11.Bb5 ab4+=) 11.Bb5+/– f5?? (Better is 11...Ne7+/–) 12.ef5 gf5 13.Qh5 (13.de5!? Bb4 14.ab4 Qh4+-) 13...Bf7 14.Qf5 (Better is 14.Qe2 e4 15.Nf5+-) 14...Qh4?? (Better is 14...e4+-) 15.Qd7 Kf8 16.de5 Re8 17.0-0 Nf6 (17...Be5 18.Be5 Re5 19.Nf3+- (< 19.Qc7 Re7 20.Qb8 Kg7+-)) 18.Qf5 Be5 (18...Bg6 19.Qf6 (19.ed6?! Bf5 20.Nf3 Qh6 21.Be8 Ke8=) 19...Qf6 20.ef6+-) 19.Be5 (19…Re6 20.Bd7 Nd7 21.Bh8+-) 1–0. Caldelari,Andrea – Rodic,Oliver, Stadtcasino op 3rd, 1998.

5.d4 Bd6 6.e3 Ngf6 7.c4 0-0 8.Nc3 a5 9.b5 Ne4 10.Ne4 de4 11.Nd2 Qg5 12.c5 Be7 13.c6 bc6 14.bc6 Nf6 15.Nc4 Rfb8 16.Qc2 Ra6 17.Ne5 Ra7 18.h3 Bd6 19.g4 Be5 20.de5 Ng4 21.hg4 Qg4 22.Rb1 Raa8 23.Be2 Qg2 24.Rh4 Qg1 25.Bf1 a4 26.Qd2 Rb6 27.Qc3 Rab8 28.Qc1 Bg4 29.Qc3 Bf3 30.Rf4 Bg2 31.Kd2 Bf1 32.Qc1 Qg2 33.Qf1 Rb2 34.Kc3 Qg5 35.Rb2 Qe5 36.Kc4 Qb2 37.Qd1 Qa3 38.Qd8 Rd8 39.Rf5 Qb3 40.Kc5 ef5 41.f3 Rd5# 0–1. Machete99 – roboPjf, ICC, 2002.

5.e3 a5 6.b5 Ngf6 7.c4 dc4 8.Bc4 Nc5 9.d4 Nce4 10.Nbd2 Bd6 11.Ne4 Be4 12.Nd2 (12.0-0 0-0=) 12...Bg6 (12...Bg2!? 13.Rg1 Bd5 14.Bd5 ed5 15.Rg7 Bh2+=) 13.0-0 0-0 14.a4 Qe7 15.Qe2 Nd5 16.Bd5 (16.Rfd1 Rad8=) 16...ed5+= 17.f4 (17.Qf3 Bb4 18.Nb1 Qg5+=) 17...f6 (17...Bf5!?-/+) 18.f5= Bf7 19.Rae1 Rfe8 20.g4 (20.Qd3 c6+=) 20...c6-/+ 21.Rf3 (21.bc6 bc6 22.Qd3 Rab8-/+) 21...cb5 22.Qb5 Bb4 23.Re2 Rac8 24.Nf1 Red8 25.Qd3 Qd7 26.Qb3 Be8 27.e4 Qa4 28.e5 Qb3 29.Rb3 Ba4 30.Rg3 (30.Rb4 ab4 31.Rd2 Kf7-+) 30...Bb5 31.Reg2 (31.Ree3 fe5 32.Re5 Bf1 33.Kf1-+) 31...fe5 32.Ne3 ed4 33.Bd4 Rc1 34.Kf2 Be1 35.Kf3 Bg3 36.Rg3 a4 0–1. Miras Garcia,Eduardo (2000) – Arias Torio,Sergio (2175), Asturias–ch, 2004.

5.e3 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7).

5.e3 Ngf6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.e3 h5 6.d4 Nb6 7.Nbd2 g5 8.Bd3 Bd3 9.cd3 g4 10.Ng1 f5 11.Ne2 Qd7 12.0-0 Na4 13.Bc1 Nf6 14.e4 h4 15.e5 Nh5 16.Nb3 0-0-0 17.Nc5 Nc5 18.dc5 d4 19.Bg5+= Be7 20.Be7 Qe7= 21.Qa4 Kb8+= 22.c6 Qe8 23.b5+/– Rd5 24.cb7 Qd7 25.Rfb1 f4 26.Rb4+- Rd8 27.Qa6 Qe7 28.Rc1 Rc5 29.Rbc4 Rc4 30.Rc4 f3 31.b6! (31...cb6 32.Rc8 Rc8 33.bc8Q#) 1–0. Confente,Giuseppe – Andersson,Lars H, corr ICCF TT–4–90 semi, 1994.

5.d4 Bd6 6.e3 Ne7 7.c4 c6 8.c5 Bc7 9.Bd3 Nd7 10.Nh4 (10.0-0 e5 11.Bf5 Nf5=) 10...Bg6 (10...Bd3 11.Qd3 e5 12.Qd1+=) 11.f4 (11.Ng6 hg6 12.h3 e5+=) 11...Nf5 (11...Bd3 12.Qd3 e5 13.0-0=) 12.Bf5 Bf5 13.Qh5 g6 14.Qh6 Qe7 15.g4 (15.Nc3 0-0-0=) 15...Bd3 (worse is 15...Bg4 16.Ng6 hg6 17.Qh8 Nf8 18.Qh4+/–) 16.f5? (better is 16.Kd2!? Be4 17.Nc3+=) 16...0-0-0 17.Kd2 (17.fg6 Be4 18.g7-+) 17...ef5 18.Nc3 Be4 19.Rhg1 Rde8 (19...fg4!? 20.Rg4 f5 21.Rgg1-+) 20.gf5 g5 21.Rg4 (21.Ne4 Qe4 22.Ng2 Qf5 23.Raf1-+) 21...Bf3!! 22.Nf3 Qe3 23.Kc2 Qf3 24.Rag1 Qf5 25.Kb3 Re3 26.h4 Rh3 27.Qg7 Re8 28.hg5 Re2 29.Qh8 Bd8 30.Qh7 Rh7 31.Ne2 fg5 32.a4 Rh2 33.R4g2 Qf3 34.Bc3 Rg2 35.Rg2 Qg2 36.Nc1 Qf3 37.b5 Bf6 38.b6 Bd4 39.Na2 Nc5 (39...Nc5 40.Kb2 Na4 41.Kc1 Nc3 42.Nc3 Qc3 43.Kd1 Be3 44.Ke2 g4 45.Kf1 Qd2 46.ba7 Qf2#) 0–1. Stryka,Rostislav – Pokorny,Jan (1770), Chrudim op, 2004.

5.e3 Bd6 6.c4 Bb1 (6...c6!?=) 7.Qb1 b6 8.Bd3 c6 9.cd5 ed5 10.Bh7 Ne7 11.Nd4 Qd7 12.Nf5 Nf5 13.Bf5 Qe7 14.Bg6 Kd8 15.h3 Nd7 16.Qc2 c5 17.Qd3 Ne5? (better is 17...d4+/–) 18.Qd5+- Rb8 19.Bc2 c4 (19...Nd7 20.b5+-) 20.Rc1 b5 21.Bd4 Rh5 (21...a6 22.Bc5 Kc7 23.d4 Bc5 24.bc5+- (24.dc5?! Rbd8 25.Qe4 g5+-)) 22.0-0 Kd7 (22...g6 23.Ba7! Qa7 24.Qd6 Nd7 25.d3+-) 23.f4 Nd3 (23...Qe6 24.Qe6 Ke6 25.fe5 fe5+-) 24.Qh5 Nc1 25.Rc1 a6 (25...g5 26.Bf5 Kc7 27.d3 gf4 28.dc4+-) 26.Bf5 Kc6 (26...Kd8 27.d3+-) 27.d3 Rd8 (27...g6 28.Qg6 Re8 29.dc4 bc4 30.Rc4 Kb7 31.Rc3+-) 28.dc4 bc4 29.Rc4 Kb5 30.Bd7 Kc4 31.Qe2 Kd5 32.Qa2 Ke4 33.Qc2 Kd5 1–0. marekt – raymac, ChessWorld.net, 2012. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6)

5.d3 c5 6.bc5 Bc5 7.Bd4 Qb6 8.Bc5 Qc5 9.e3 0-0 10.Nd4 Bg6 11.Be2 Nbd7 12.0-0 Rac8 13.c3 e5 14.Nb3 Qb6 15.Qc2 Nc5 16.Nc5 Qc5 17.Qb2 Rfe8 18.Qb4 d4 19.Qc5 Rc5 20.c4 b5 21.Nd2 Rd8 22.ed4 ed4 (22...Rd4? 23.Nb3 Rc8 24.Nd4 ed4 25.Rfc1+-) 23.Nb3 (23.Rfc1!?+=) 23...Re5-/+ 24.Rfe1 Rde8 25.Nd4 Bd3! 26.Kf1 (26.Bd3 Re1 Double attack (26...Re1 Pinning; 26...Re1 Deflection)) 26...Bc4 27.Bc4 bc4 (27...Re1 28.Re1 bc4 29.Re8 Ne8 30.Ke2-/+) 28.Re5+= Re5 29.Nc6 Rc5 30.Na7 c3 31.Rc1 (31.Ke2 Nd5+=) 31...Ne4 (31...Nd5 32.Rb1 g6 33.Ke2 Nf4 34.Ke3 Ng2 35.Kd3-+) 32.Rc2 (32.Ke2!?+=) 32...Ra5-/+ 33.Nc6 Ra3 34.f3 (34.Ke2 Nf6 35.Kd3 Ng4+=) 34...Nc5 (better is 34...Nf6-+) 35.Ne7= Kf8 36.Nd5 Na4 37.Ke2 g6 38.Ke3 Kg7 39.Kd4 Rb3 40.g4 (40.Ra2 Rb1 41.f4= (41.Ra4? c2 42.Rc4 c1Q 43.Rc1 Rc1-+; 41.Nc3?! Nc3 42.Kc3 h5=)) 40...Rb2+= 41.Kd3 Kh6 (41...g5 42.h3-/+ (42.Nc3? Nc5 43.Kd2 Nb3 44.Kd3 Rc2 45.Kc2 Nd4 46.Kd3 Nf3-+)) 42.h4 (42.f4 g5 43.f5 Kg7=) 42...Nb6 (better is 42...f5!?+=) 43.Nb6= Rb6 44.Rc3 Kg7 ½–½. Jefimow,Bronislaw (1800) – Witek,Pawel (1890), Ursus op, 2006.

5.d3 c5 6.bc5 Bc5 7.e3 0-0 8.Be2 Nbd7 9.0-0 Qb6 10.Qc1 Rac8 11.Nc3 Rfd8 (11...Qc6 12.Rb1+=) 12.Na4= Qc6 13.Nc5 Qc5 (worse is 13...Nc5 14.Bf6 gf6 15.Nd4+/–) 14.Bd1 Qd6 15.Qd2 e5 16.Qb4 Qb4 (better is 16...Qc7+=) 17.ab4+/– e4 18.Nh4 (18.de4!? Be4 19.Ra7+/–) 18...Bg4+= 19.f3 ef3 20.Nf3 a6 21.h3 Bh5 (21...Bf3 22.Rf3 Re8 23.Bd4+=) 22.g4+/– Bg6 23.Nh4 Re8 24.Ng6 hg6+= 25.Kf2 Ne5 26.Rc1 b5 27.Ra1+= Nfg4 28.hg4 Ng4 29.Kg1 Ne3 Attacking the backward pawn on c2 30.Re1 Nd1 31.Re8 Re8 32.Rd1 Re2 33.Rc1 f5 34.Kf1 Re6 35.Re1 Re1 36.Ke1 g5 37.c4 bc4-/+ 38.Kd2 Kf7 39.dc4 dc4 40.Bd4 f4 41.Ke2? g4-+ 42.Be5 g5 43.Bc3 Ke6 44.Kf2 Kf5 45.Kg2 g3 46.Bg7 g4 47.Bh8 Ke4 Black intends f3 48.Bc3 Ke3 49.Be5 f3 50.Kg1 f2 51.Kf1 Kf3 (51...Kf3 52.Bg3 Kg3 53.Ke2 Kg2 54.Ke3 f1Q 55.Kd4 Qd3 56.Ke5 c3 57.Kf6 c2 58.Ke7 c1Q 59.Kf6 Qf4 60.Ke7 Qfd6 61.Kf7 Q3g6) 0–1. Bah,Ismael (1765) – Gallet,Hadrien (1630), Saint Denis FRA, 2011.

5.d3 c5 6.bc5 Bc5 7.e3 Nc6 8.Nbd2 h6 9.Be2 0-0 10.0-0 Re8 11.Nb3 Be7 12.Ra2 Qc7 13.Qa1 Red8 14.Rc1 Rac8 15.Nbd4 Nd4 16.Bd4 Ne8 (16...Qa5 17.Ne5=) 17.c4 (worse 17.Ba7 b6 18.Bb6 Qb6-+) 17...Qb8 (17...f6 18.Rac2+= (worse 18.Ba7 b6-/+)) 18.Rac2 dc4 19.Rc4 Bf6 20.Qc3 (20.Qb2 Bd4 21.Nd4 Bh7+=) 20...Nd6 21.Bf6 Rc4 22.dc4 Ne4 23.Qe5 Nf6 24.Qb8 Rb8 ½–½. Lancel,Edmond – Limbos,Paul, Brussels, 1929.

5.d3 Bd6 6.Nbd2 0-0 7.g3 (7.c4 c5=) 7...a6 (8.c4 Re8=; 7...a5 8.b5=+) =. reza9739 – Stiller, ChessWorld.net, 2002.

5.d3 Nbd7 6.Nbd2 c6 7.Nh4= Bg6 8.Ng6 hg6 9.e3 Qb6 (9...a5 10.c3=) 10.c4 Qc7 11.h3 dc4 12.Nc4 Rd8 13.Rc1 Nb6 14.Qb3 (14.Be5 Qd7+=) 14...Nc4= 15.Qc4 Qd7 16.Bd4 Bd6 17.Qc3 a5 (17...Nd5 18.Qb3+=) 18.Bf6 (18.ba5!? Nd5 19.Qb2+=) 18...ab4= 19.ab4 gf6 20.Be2 Qe7 21.Rb1 Rh4 Attacks the isolani on b4 22.e4 (22.Bg4 Ra8=) 22...Be5=+ 23.Qa3 Bd4 24.g3 Rh6 25.Kf1 (25.Qc1 Rh8=+) 25...Kf8 (25...f5 26.Qc1 g5 27.b5-/+) 26.Kg2=+ Kg7 27.Qc1 Rhh8 28.Qc4 White prepares the advance b5 28...Bb6 (28...Qd6 29.Bf3=+) 29.h4 (29.b5 Rd4 30.Qc2 c5=) 29...Rd4 30.Qc3 Qd6 31.b5 c5 32.Ra1 Rb4 33.Rab1 Rb1 34.Rb1 Ra8 (34...Qd7 35.e5 fe5 36.Qe5 f6 37.Qe3=) 35.Ra1 (35.Qc4 Kf8=) 35...Rd8 (35...Ra1 36.Qa1 Qd7 37.Qa4=) 36.Ra4 Qe7 37.f4 Kg8 (37...Qd7 38.Qc4=) 38.Qa1 (38.h5 gh5 39.Bh5 Kg7=) 38...f5 39.ef5 (39.Qc3 Qe8 40.Qb3 Rd7=) 39...ef5 40.Qe5 Qd7 41.Qb2 Re8 (41...Qd5 42.Bf3 Qd3 43.Bb7 c4=+) 42.Qa2 (better 42.Ra3!?=) 42...Qb5-/+ 43.Ra8 Bd8 44.Kf2 Qd7 45.Qc4 Qe7 (45...b6 46.h5 Kg7 47.Qb3-+) 46.Ra2 (better 46.Bf3!?-/+) 46...Qe3 47.Kg2 Bf6 48.Bf3 Rd8 (better 48...Bd4!? 49.Qc2 Qg1 50.Kh3 b5-+) 49.Re2-/+ Qd3 50.Qd3 Rd3 51.Bb7 Rd7 (51...c4 52.Ba6 Rd4 53.Kf3-/+) 52.Bf3 c4 53.Rc2 c3 54.h5 Kg7 55.hg6 fg6 56.Kf2 Rd4 (56...Re7 57.Re2-+) 57.Ke3 Rb4 58.Kd3 Ra4 59.Bd1 (59.Ke3 Ra6-/+) 59...Rd4-+ 60.Ke2 Re4 (60...Rd8 61.Ra2-+) 61.Kf1 (61.Kd3 Re6-/+) 61...Re3-+ 62.Kg2 Kh6 63.Rf2 Bd4 (63...Bd4 64.Rc2 g5-+) 0–1. Abraham,Lajos (1810) – Kun,Joan (1845), Arnoth Sandor Memorial, 2011. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6 4.a3 Nf6)

5.d3 Nbd7 6.Nbd2 Be7 7.Rc1 (7.e4 de4 8.de4 Ne4 9.Ne4 Be4 10.Bg7 Rg8-/+) 7...a5-/+ 8.b5 c5 (8...0-0 9.c4-/+) 9.a4 d4 (9...0-0 10.c4=+) 10.e4 de3 11.fe3 Bg4 (11...0-0!? 12.Nc4 Ng4=+) 12.Be2= Nd5 13.Nc4 N7b6 14.e4 Nc4 15.dc4 Nf4 16.0-0 (16.Bg7 Rg8 17.Qd8 Rd8=) 16...Qd1 (16...Bf6 17.e5 Bg5 18.Rb1=) 17.Bd1+= (17.Rcd1?? Ne2 18.Kh1 Nd4-+) 17...0-0 18.g3 Ng6 19.Kg2 Rad8 20.h3 Bf3 21.Bf3 Ne5?? (21...Bf6 22.Ba3 Rd2 23.Rf2 Rd7=) 22.Rcd1 (better 22.Be5 Rd2 23.Rf2+-) 22...Nc4=+ 23.Bc3?? (better 23.Bc1=+) 23...Rd1-+ 24.Rd1 Ne3 (24...Ne3 25.Kf2 Nd1 26.Bd1 f6-+) 0-1. ozo (2045) - Goran_Krastev (2220), Rated Blitz game, lichess.org, 2015. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4 Bf5 3.Bb2 e6 4.a3)

5.d4 a5 6.b5 Nbd7 7.e3 Bd6 8.c4 dc4 9.Nbd2 c3 10.Bc3 Nd5 11.Bb2 N7f6 12.Nc4 0-0 13.Be2 Be7 14.0-0 Ne4 15.Rc1 a4 16.Bd3+= Nef6 17.Re1 Be4 18.Bc2 Bc2 19.Qc2 Qe8 20.e4 Nf4 21.b6 c6 22.Rcd1 N6h5 23.Bc1 f5 24.Nfe5 fe4 25.Re4 Nd5 26.Rde1 Nhf6 27.R4e2 Qd8 28.Nf3 Nd7 29.Re6+/– Bf6 30.Rd6 Qc8 31.Bg5 Ra6 32.Bf6 N7f6 33.Ng5 Qg4 34.Ne6 Re8 35.Re5 Raa8 36.h3 Qh4 37.Nc7 Rf8 38.Na8 Ra8 39.Qb2 Rf8 40.Ne3 Ne3 41.Re3 Nd5 42.Re5 g6 43.Rd7 Rf7 44.Re8 Kg7 45.Rf7 Kf7 46.Rb8 Qe7 47.Rc8 Qe4 48.Qc1 Qd4 49.Qh6 Ke6 50.Qh7 Ne7 51.Rc7 Qa1 52.Kh2 Qa3 53.Rb7 Qd6 54.g3 a3 55.Qh4 Qc5 56.Qe4 Kf6 57.Qf3 Ke6 58.Rc7 Qd6 59.Qe3 Kf6 60.Ra7 Nd5 61.Qe8 Kf5 62.b7 Qc5 63.Qf7 Nf6 64.Ra5! Qa5 65.g4 Ke4 66.Qc4 Kf3 67.b8Q Qb6 68.Qg3# 1–0. Fritz 5.00 MMX – Hiarcs5 P90, 1998.

5.d4 b6 6.e3 Bd6 7.c4 0-0 8.Nbd2 Nbd7 9.b5 a6 10.ba6 Ra6 11.c5 bc5 12.Ba6 c4 13.Bc3 Ne4 14.Ne4 Be4 15.Bb5 Nf6 16.Bc6 Bd3 17.Nd2 Ne4 18.Ne4 de4 19.Qh5 g6 20.Qb5 Qh4 21.h3 Qh6 22.h4 Qg7 23.a4 f5 24.g3 Qh6 25.Bd7 g5 26.d5 Bg3 (26...e5+-) 27.Be6 (27...Qe6 28.de6 Bf2 29.Kf2 Bc2 30.Qd7 Rf6 31.Bf6 Ba4 32.Qf7) 1–0. MickeyMouse (2250) – chessH (2075), ChessWorld.net, 2002.

5.Nd4 Bg6 6.Nb3 Be7 7.e3 b6 (7...0-0 8.Be2+=) 8.g4 (8.Be2 0-0+=) 8...0-0+= 9.h4 h6 (9...Nc6 10.g5 Nd7 11.f4-/+) 10.d3 c5 (10...h5 11.g5 Ng4 12.Bh3+=) 11.bc5 bc5 12.g5 hg5 13.hg5 Nh7 14.f4 Qb6 15.Nc3 c4 16.dc4 Qe3 17.Ne2 dc4 (17...Qe4 18.Qd4 e5 19.Qe5 Qe5 20.Be5=) 18.Nbd4 Qe4 19.Rh2 Qb7 20.Rb1 Re8?? (better is 20...Nd7 21.Bg2 Be4 22.Ne6 Bg2 (worse is 22...fe6 23.Bc3 Qd5 24.Be4 Qe4 25.Qd7+=) 23.Bg7 Qf3 24.Bf8 Nhf8+=) 21.Bg2+- Be4 22.Ng3 Bg2 23.Qh5 Be4 24.f5 Bd6 25.Qh7 Kf8 26.Ne4 Qe4 27.Re2 Bg3 28.Kd1 Qh4 29.Ne6 Re6 30.Qg7 Ke8 31.Qg8 Kd7 32.Qf7 (32.Qf7 Kc6 33.Qe6 Bd6 34.Qc8 Bc7 35.Re6 Kc5 36.Qc7 Kb5 37.Bc3 Ka4 38.Qa5; 32.Re6?! Qh1 (32...fe6 33.Qe6 Kc7 34.Be5 Be5 35.Qe5 Kc6 36.Qb5 Kd6 37.Qb4 Kd5 38.Qb7 Nc6 39.Rb5 Kd6 40.Qa8 Qd4 41.Kc1 Qa1 42.Kd2 c3 43.Ke2 Nd4 44.Kf2 Nb5 45.g6+=) 33.Kd2 Qd5 34.Ke3 fe6 35.Qf7 Kd6 36.Qf8 Kc7 37.Qe7 Qd7 38.Qd7 Nd7 39.fe6 Nf8+=) 1–0. Straka,Jozef – Malik,Marian, XV. Slovakia Cup Preliminary, sect.13, 2009.

5.Nd4 Bg6 6.e3 a6 7.Be2 Be7 (7...c5 8.bc5 Bc5 9.0-0=) 8.0-0 0-0 9.d3 c5 10.bc5 Bc5 11.Nd2 Nbd7 12.Rb1 Qe7 13.a4 Rab8 14.N4f3 Ba3 15.Bd4 Bc5 16.Bc3 Rfc8 17.Nh4 Bd6 18.Ng6 hg6 19.Bb2 Ba3 (19...b5 20.ab5 ab5 21.e4=) 20.Ba3+= Qa3 21.c4 Qe7 (21...e5 22.Re1+=) 22.d4 dc4 23.Bc4 Nb6?? (better is 23...Qa3+=) 24.Rb6+- (24...Nd7 25.Rb2+-) 1–0. kamret (2230) – tigran (1735), GameColony.com, 2003.

5.Nd4 Bg6 6.e3 c6 7.Nc3 Bd6 8.Bd3 Qc7 9.f4 Bd3 10.cd3 Bf4 (better is 10...0-0!?=) 11.ef4+/– Qf4 12.Nce2 Qh4 13.g3 Qh6 14.Nc2 Nbd7 15.Ne3 0-0 16.0-0 b6 17.Rc1 Rac8 18.Qa4 c5 19.d4 (19.Qa7?! d4 20.Nc4 b5=) 19...c4 20.Qa7 Ne4?? (better is 20...Ra8 21.Qc7 Rfc8+/–) 21.Qd7+- Nd2 22.Rf4 Qh5 23.Ng4 Rcd8 24.Qc7 f5 25.Rc2 fg4 26.Rd2 1–0. Trokenheim,Marek (1830) – Schwarz,Ingo (1605), OP–2012–0-02039, 2012.

5.g3 (--> 3.Nf3 e6 4.g3 Nf6 5.a3).

5.Nh4 c5 6.Nf5 ef5 7.e3 cb4 8.Qf3 ba3 9.Na3 g6 10.Bb5 Nc6 11.c4 Ba3 12.Ba3 Ne4 13.Qf4 f6 14.f3 Ng5 15.Rb1 Qd7 16.cd5 Qd5 17.Ba4 Ne6 (better is 17...Qd7!?=) 18.Qb4+/– Qd7 19.Qb7 Rc8 20.d4 Rc7 21.Qb3 Kf7 22.d5 Qc8 (22...Rb8 23.de6 Qe6+-) 23.Bc6 (23.Bc6 Rd8 24.de6 Qe6 25.Ba4 Qb3 26.Bb3 Kg7 27.Ke2+-) 1–0. Schellen,Anton – Baticulon,Nestor, RE–2010-0-00041, 2010.

5.Nh4 Be7 6.Nf5 ef5 7.e3 0-0 8.c4 c5 9.bc5 Bc5 10.cd5 Nd5 11.Qc2 Qb6 12.Nc3 Nc3 13.Qc3 (worse is 13.dc3 f4 14.e4 Re8+=) 13...f6 14.Rb1 Kh8 15.d4 Bd6 16.Bd3 f4 17.Bc1 Qc6 18.Qc6 Nc6 19.Rb7 fe3 20.fe3 Rfb8 21.Rd7 Rd8 22.Rd8 Rd8 23.g3 Rb8 24.Rf1 h6 25.Rf5 Rb3 26.Bc2 Rb6 27.Rd5 Ne7 28.Ra5 Nc6 29.Ra4 Kg8 30.Bd2 Kf7 31.d5 Ne7 32.Ra7 1–0. Kazimierski,Tomasz – Visser,Bob, RD–2009–0-00026, 2009. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6 4.a3 Nf6)

5.Nh4 Bg6 6.Ng6 hg6 7.d4 a5 8.c3 Ng4 9.e3 Nh2 10.g3 Nd7 11.Be2 Nf6 12.Nd2 Rh6 13.Qc2 ab4 14.cb4 Bd6 15.e4 de4 16.Ne4 Nhg4 17.Rh6 gh6 18.Bf3 c6 19.Nc5 Qc7 20.Nb7 Bg3 21.Qc6 Ke7 22.fg3 Qg3 23.Kd2 Qf2 24.Kc3 Rc8 25.Qc8 Qf3 26.Kc2 Ne3 27.Kb3 Nd1 28.Ka2 Qd5 29.Kb1 Ne4 30.Qc7 Ke8 31.Na5 Qf5 32.Ka2 Qf2 33.Rd1 1–0. NZ cricketer – grandmaster goldberg, ChessWorld.net, 2005.

5.Nh4 Bg6 6.Ng6 hg6 7.e3 Bd6 8.h3 Nbd7 9.c4 c6 10.Qc2 Qe7 11.Nc3 Ne5 12.d3 g5 13.c5 Bc7 14.0-0-0 Ng6 15.g3 e5 16.Bg2 Nd7 17.Ne2 f5 18.e4+= fe4 19.de4 d4 20.Kb1 Rf8 21.Rhf1 a5 22.Rd3 Qe6 23.Qb3 Ke7 24.Qe6 Ke6 25.Kc2 b6 26.cb6 Nb6 27.Nc1 ab4=+ 28.ab4 Bd6 29.Rb3 Rf7 30.Bf3 Nc4 31.Be2 Nb6 32.Nd3+= Rfa7 33.Bh5 Nf8 34.f4 gf4= 35.gf4 Nc4 36.fe5 Ne3 37.Kc1 Nf1 38.ed6 g6 39.Bf3 Ra2? 40.e5+- Nd7? 41.Bg4 Kd5 42.Bd7 Ne3 43.Bg4 Kc4 44.Be6 Nd5 45.Nc5 Rf8 46.Kb1 Raa8 47.d7 Rf1 48.Bc1 Raf8 49.Bd5 cd5 50.e6 Re1 51.Rb2 d3 52.Rd2 Re3 53.Rd3 Re1 54.Rd2 Kc3 55.Rc2 (55...Kd4 56.Nb3 Kd3 57.Rc8+-) 1–0. Schwarz,B – Weichert,P, OWL–ch Buende, 1949.

5.Nh4 Bg6 6.Ng6 hg6 7.g3 Nbd7 8.Bg2 c6 9.d3 a5 10.c3 ab4 11.cb4 Qb6 12.0-0 c5 13.Bf6 gf6 14.bc5 Bc5 15.a4 0-0 (15...Qb4 16.Qd2+=) 16.e3 Qb4 17.d4 Be7 18.Nd2 b6 19.Ra2 (19.Qc2 Rfc8 20.Qa2 Rc3=) 19...b5+= 20.Qa1 Ra4 ½–½. Muntean,Ci (2160) – Kiraly,F (1920), XI Bancpost A, Miercurea Ciuc ROM, 2008.

5.Nh4 Bg6 6.Ng6 hg6 7.h3 a5 8.Nc3 (8.b5 Nbd7=) 8...a4 (8...ab4!? 9.ab4 Ra1 10.Qa1 Bb4 11.Qa4 Nc6+=) 9.d4 Nc6 (9...Bd6 10.Qd3=) 10.e3+= Nb4? (10...Nd7!?+=) 11.ab4+/– Bb4 12.Bb5 c6 13.Ba4 Ne4 14.Qd3 Qf6?? (better is 14...b5 15.Bb5 Bc3 16.Bc3 Ra1 17.Ba1 Qa5 18.Ke2 cb5=) 15.0-0+- 0-0? (15...Bc3 16.Bc3 Kd7+-) 16.Ne4 de4 17.Qe4 b5 (17...Ra6 18.c4+-) 18.Bb3 Ra1 (18...Rac8 19.Ra7+-) 19.Ra1 (better is 19.Ba1 c5 20.dc5 Bc3 21.Bc3 Qc3+-) 19...Bd6 (19...Rc8+-) 20.Qc6 Be7 21.Qb5 Bd6 (21...Rd8 22.c4+-) 22.Ra2 Qe7 23.d5 e5 24.Qa5 Bc7 (24...Rc8 25.c4+-) 25.Ba3 Bd6 (25...Ba5?? 26.Be7 Re8 27.d6+-) 26.Bb2 e4?? (better is 26...Bc7=) 27.Qc3 (27.Qa7 Qa7 28.Ra7 Rd8+-) 27...f6 28.Qd4 g5 (28...Re8 29.Ra6 Kh8 30.Qa7+-) 29.Ra7 Qe5 (29...Qe8 30.Ra6 Qb8 31.Qe4+-) 30.Qe5 Be5 (30...fe5 31.Rd7 Rf6 32.c4+-) 31.Be5 fe5 32.d6 Kh7 33.d7 g4 34.Rc7 Rd8 35.Be6 (better is 35.Ba4 gh3 36.gh3+-) 35...Ra8 (35...Kg6+-) 36.Bf5 Kh6 37.Bg4 (37.Rc6 Kh5 38.hg4 Kg5 39.Rg6 Kh4 40.g3 Kh3 41.g5) 37...Ra1 38.Kh2 Rf1 (38...Kg6 39.d8Q Ra6 40.Qe7 Ra1 41.Qg7) 39.d8Q Rf2 (39...Rh1 40.Kh1 Kg6 41.Qe7 Kh6 42.Qg7) 40.Qh4 Kg6 41.Qf2 (41.Qh5 Kf6 42.Rf7) 41...Kh6 42.Rc6 (42.Qh4 Kg6 43.Qh5 Kf6 44.Rf7) 42...g6 43.Qh4 Kg7 44.Rc7 Kg8 (44...Kf8 45.Qd8) 45.Qd8 1–0. overtoom – dgatenby, gameknot.com, 2013.

5.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.e3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.e3 Nbd7 6.c4 a5 7.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.c5 a5 7.a3).

5.e3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.c4 Nf6 6.e3 Be7 7.cd5 ed5 8.Bf6 Bf6 9.d4 0-0 10.Bd3 Bd3 (10...Bg4 11.0-0=) 11.Qd3+= Nd7 12.0-0 c6 13.Nbd2 g6 14.Rac1 Bg7 15.b5 Rc8 16.bc6 bc6 17.Nb3 Qe7 18.Nc5 Nc5 19.Rc5 Rc7 20.Rfc1 Exerts pressure on the backward pawn 20...Rfc8 21.Qa6 The pressure on the backward pawn c6 grows 21...Qe6 22.R5c3 Rb8 23.h3 (23.Rc6?? Rc6 24.Qf1 Rc1 25.Qc1 Bf8-+) 23...Rb6 24.Qd3 Qd6 25.Qe2 Qe6 26.Qc2 g5 (26...Bf8 27.Ne5+=) 27.a4 f5 28.a5 Rb5= 29.Rc6 White is in command. White gets strong play along the open c–file 29...Rc6 30.Qc6 Qc6 31.Rc6 Ra5 The passed pawn on a7 quickly leads to threats 32.h4 g4 33.Ne5 Be5 34.de5 Ra1 35.Kh2 a5 36.Rh6+- a4 37.Ra6 a3 38.e6 Kf8 39.h5 a2? 40.h6 Rc1 41.Ra2 Rc8 42.Ra7 Kg8 43.Rg7 Kh8 44.e7 Re8 45.Rf7 Kg8 46.Rf8! Rf8 Theme: Blockade 47.h7! (47.h7 Kg7 48.ef8Q Kf8 49.h8Q Kf7 50.Qe5+-) 1–0. Woelfelschneider,Peter – Goetz, 2009.

5.Nd4 Bg6 6.Nb3 Nf6 7.d3 Be7 8.g3 0-0 9.Bg2 Nbd7 10.0-0 c5 11.c3 Rc8 12.N1d2 b6 13.b5 a5 14.c4 d4 15.Nf3 Ng4 16.Nbd2 f5 17.h3 Ngf6 18.Re1 e5 19.e3 Bd6 20.ed4 cd4 21.Nb3 Bh5 22.Qd2 a4 23.Nbd4 ed4 24.Nd4 Bg6 (better is 24...Nc5+=) 25.Ne6+/– Qe7 ½–½. Ruttkay,Peter (2140) – Jagicza,Istvan (2225), HUN–chT2 Erkel, 2004.

5.e3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 h6).

5.a4 ab5 6.ab5 Ra1 7.Ba1 Qd7 8.e3 c5 9.Nh4 Nh6 10.Nf5 Nf5 (worse is 10...ef5 11.Qf3 f6 12.Nc3+-) 11.c4 dc4 12.Bc4 Nd6 13.Qb3 Nc4 14.Qc4 Bd6 15.0-0 0-0 16.Nc3 Be7 17.Ne4 Qd5 18.Qc3 f6 19.Qc2 Rd8 20.d4 cd4 21.Bd4 Qb5 22.Rb1 Qc6 23.Qc6 Nc6 24.Bb6 (24.Bc5!?+=) 24...Rd5-/+ 25.g3 f5 26.Nc3 Rd2 27.Bc7 Bb4 28.Na4 Kf7 29.Bb6 Rc2 30.Nb2 Bd6 31.Nd3 e5 32.Rc1 Rc1 33.Nc1 Ke6 34.Nb3 Kd5 35.Kf1 (35.f4 g6-+) 35...Kc4 36.Na5 Na5 37.Ba5 b5 38.Ke2 b4 39.Kd1 b3 40.Kc1 e4 41.Bb6 Be5 0–1. algernon (2355) – zzvotra (2610), net–chess.com, 2013.

5.e3 ab5 6.Bb5 c6 7.Be2 Qb6 8.Qc1 Nf6 9.0-0 Be7 10.Nd4 Bg6 11.f4 0-0 12.c4 dc4 13.f5 ef5 14.Nf5 Bf5 15.Rf5 Ra5 16.Ra5 Qa5 17.Qc4 Nd5 18.Qb3 b5 19.a4 b4 20.d4 Bg5 21.e4 Re8 22.Bf3 Nb6 23.Bh5 Re7 24.Qd3 N8d7 25.Bd1 Nf6 26.e5 Nfd5 27.Bc2 g6 28.Bb3 Be3 29.Kh1 Ra7 30.Nd2 Qa6 31.Qa6 Ra6 32.Nf1 Bf4 33.a5 Nd7 34.Kg1 Nf8 35.Bc4 Ra7 36.Kf2 Ne6 37.Bd5 cd5 38.g3 Bg5 39.Ne3 Nc7 40.Ke2 h6 41.h4 Be7 42.Kd3 f6 43.Ng4 fe5 44.de5 Kg7 45.Nf6 b3 46.Bd4 Rb7 47.a6 Rb8 48.a7 Ra8 49.Rb1 Ne6 50.Nd5 Nd4 51.Ne7 Ra7 52.Kd4 Re7 53.Rb3 Ra7 54.Rf3 Ra4 55.Kd5 Ra5 56.Kd6 Ra6 57.Kd7 Ra7 58.Kc6 Ra6 59.Kb5 Re6 60.Re3 Re8 61.Kc6 Rc8 62.Kd7 Ra8 63.e6 Ra7 64.Kd6 Kf8 65.Rc3 Ra8 66.Ke5 g5 67.hg5 hg5 68.Kf6 g4 69.Rc7 Rb8 70.Rf7 Kg8 71.Rg7 Kh8 72.Rg4 Rf8 73.Ke7 Rf3 74.Ke8 Kh7 75.e7 Kh6 76.Kd7 Re3 77.e8Q Re8 78.Ke8 Kh5 79.Rg8 Kh6 80.Kf7 Kh7 81.Rg6 Kh8 82.Rh6# 1–0. Bonetti,Shane – Ravana (2430), ICC, 2002.

5.e3 ab5 6.Bb5 c6 7.Be2 Qb6 8.Qc1 Nf6 9.0-0 Be7 10.Nh4 0-0 11.Nf5 ef5 12.c4 dc4 13.Bc4 Qc7 14.Qc2 Ne4 15.f3 Nd6 16.Bd3 Qa5 17.Bc3 Qd5 18.Bd4 Nd7 19.Bb2 Qe6 20.Nc3 Ne5 21.Be2 Nec4 22.Bc1 Bf6 23.Re1 c5 24.a3 Rfd8 25.g3 b5 26.Kf1 b4 0–1. Bonetti,Shane – Ravana (2425), ICC, 2002.

5.e3 ab5 6.Bb5 c6 7.Be2 Nf6 8.Nh4 Be4 9.f3 Nfd7 10.g3 Qb6 11.Qc1 Bg6 12.Ng6 hg6 13.0-0 Na6 14.c4 Nc7 15.cd5 Nd5 16.Nc3 N5f6 17.Rb1 Bd6 18.Ne4 Qc7 19.Bf6 Bg3 20.hg3 Nf6 21.Rb7 Qa5 22.Nd6 Kf8 23.Qc6 Rh7 24.Rf7 Kg8 25.Bc4 Nd5 26.Rd7 Kf8 27.Nc8 Rh5 28.Qe6 Rf5 29.Bd5 Qd5 30.Qe7 Kg8 31.Qg7 1–0. Bonetti,Shane – Ravana (2090), ICC, 2002.

5.e3 c6 6.ba6 Na6 7.a3 Qb6 8.Qc1 Nc5 9.Nc3 Nf6 10.Be2 Be7 11.0-0 0-0 12.Rb1 Qa5 13.Nh4 Bg4 14.Bf3 b6 15.Bg4 Ng4 16.Nf3 Ne4 17.Nd4 Bd6 18.Ne4 Bh2 19.Kh1 de4 20.c3 Qh5 0–1. Bonetti,Shane – Ravana (2425), ICC, 2002.

5.e3 c4 6.a4 Nd7 7.Be2 Ngf6 8.0-0 Qc7 9.Nc3 Bd6 10.d3 Ng4 11.h3 h5? 12.dc4 Be4? 13.Ne4 de4+/– 14.Nd4 Bh2 15.Kh1 Bg1! 16.g3 Nf2 17.Rf2 Bf2 (18.Ne6 fe6 19.Bh5 Kd8-+) 0–1. Wartig,Wolfgang – Gross,Wilhelm, corr SOK–92–80, 1992.

5.e3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5).

5.e3 h6 6.c4 Nf6 7.Be2 Nbd7 8.0-0 Bd6 9.h3 0-0 10.d4 Nb6 11.Nbd2 dc4 12.Nc4 Nc4 13.Bc4 b6 14.Ne5 Be5 15.de5 Ne4 16.Qe2 Qh4 17.Kh2? (better is 17.Rad1=) 17...Rfd8-/+ 18.Rad1 Rd1 19.Rd1 Nf2 20.Rd2 (better is 20.Rc1!?-/+) 20...Ne4-+ 21.Rd1 Qg3 (21...Bh3!? 22.Qe1 Qe1 23.Re1-+) 22.Kg1 Bh3 23.Bd3?? (better is 23.Qf3 Bf5 24.Qg3 Ng3 25.Rd7-+) 23...Bg4 24.Qf1 Rd8 (better is 24...Ng5 25.Be2 Qe3 26.Qf2 Qe2 27.Re1 Qb5 28.Bc1-+) 25.Re1 Rd3! (25...Rd3 26.Qd3 Qe1 27.Qf1 Qh4-+) 0–1. Perez de Tudela Perales,F – Sala Espi,A (1850), De Navidad de Silla op 2th, 2002.

5.Nc3 Nf6 =.

5.e3 Nf6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5).

5.e3 Nf6= 6.Be2 Be7 (6...a6 7.a4=) 7.0-0 0-0 8.Nh4 (8.Nc3 cb5 9.Nb5 Nc6=) 8...Bg6 (8...cb5 9.Bb5 Qb6 10.Nf5 ef5 11.a4+=) 9.Ng6 hg6 10.Nc3 cb5 11.Nb5 Nc6 12.Rb1 a6 13.Nd4 Qc7 14.d3 (14.Nc6 Qc6 15.Bd3 Ne4=) 14...Rac8 15.Nc6 Qc6 16.Rc1 Qa4 Exerts pressure on the backward pawn 17.a3 Qb5 (17...Ba3? 18.Ra1 Rc2 19.Ra3+-) 18.Rb1 Qc6 19.Rc1 b5 20.Bf3 Qb6 Black intends b4 21.Qd2 b4 (21...Bd6 22.Rfe1=) 22.Rb1 (22.ab4 Bb4 23.c3 Bd6+=) 22...a5 (better is 22...Qc5 23.ab4 Qc2=) 23.Rbc1?? (23.Rfc1 Qc7 24.ab4 ab4+=) 23...Rfd8 (better is 23...ba3!? 24.Bd4 Bb4-/+) 24.Bd4 Qa6 25.ab4 Bb4 26.c3 Bc5 27.Be5 Nd7 28.Bg3 Nb6 29.Qa2 a4+= 30.d4 Be7 31.Be2 Nc4 Black prepares a3 32.Ra1 a3 33.Rab1 Qa5 34.Bc4? Rc4-+ 35.f3 Qc3 36.Qe2 Qc2 37.Qc2 Rc2 38.Rbc1 Rdc8 39.Rc2 Rc2 40.h3 Bb4 41.Be1 Be1 42.Re1 Rb2 43.Ra1 a2 44.Kh2 Kf8 45.Kg3 Ke7 46.e4 Kd6 47.e5 Kc6 48.f4 Kb5 49.Kf3 Kb4 50.g3 Kb3 51.Rc1 Rb1 52.Rc7 a1Q 53.Rf7 Qd4 54.Rg7 Qe4 55.Kg4 Qf5 56.Kf3 Kc4 57.g4 Rb3 (57...Rb3 58.Kg2 Qc2 59.Kg1 Rb1 mate) 0–1. Pluta,Natalia – Marczuk,Anna (1610), Turniej Ostatniej Szansy – D13 Poland, 2011.

5.Nc3 Bd6 =+.

5.Nd4 Be4 =+.

5.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5).

5.e3 Bd6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Bd6).

5.e3 Bg4 6.Be2 Nbd7 7.0-0 Bd6 8.d4 0-0 9.Nbd2 c6 10.a4 Qc7 11.c4 Bf3 (11...Bf5 12.c5 Be7 13.Nh4+=) 12.Nf3+= dc4 13.Bc4 Rfd8 14.Qb3 Re8 15.Rac1 c5 16.h3 Rac8 17.Rfd1 b6 18.dc5 Nc5 19.Qa2 Nfd7 (19...Nfe4 20.Qa1 f6 21.Nd4 Bh2 22.Kf1+=) 20.Nd4 (20.Qa1 g6+-) 20...Be5 21.Ba1 Qb7 22.Nc6 Ba1 23.Qa1 a6 24.Rd4 Nf6 25.Rcd1 ab5 26.ab5 Ra8 27.Qb1 Qc7 28.g3 h6 29.Kg2 Nce4?? (29...e5 30.R4d2 Nfe4 31.Rc2+=) 30.Qb2 (better 30.Re4 Ne4 31.Qe4+-) 30...Nc5+= 31.Qd2 e5 (31...Nfe4!? 32.Qc2 f5+=) 32.Rd8+- Nce4 33.Re8 Re8 34.Qb4 Nc5 35.Qa3 Nb7 36.f3 (36.Qa7 Ne4+-) 36...e4 37.f4 Na5 38.Qa2 Nc4 39.Qc4 Kh8 40.Rd2 ½–½. VELEROFONTIS – Rustaveli, playchess.de, 2001.

5.Ne5 Bd6 6.e4 Be4 7.Bd4 h6 8.Nc3 0-0 9.f3 Bh7 10.Bd3 c5 11.Bh7?? Nh7 12.Be3 d4 13.Bd4 cd4 14.Ne4 Be5 15.Qe2 d3 16.cd3 Ba1 17.0-0 Bd4 18.Kh1 Nf6 19.g4 Nh7 20.f4 Qd5 21.g5 hg5 22.h3 f5 23.fg5 Ng5 24.Qh5 0–1. manofsteel5 – LukeHatesMe, Live Game Caissa's Web, 2005.

5.g3 Bc5 6.Bg2 -/+.

5.g3 Bd6 6.Bg2 0-0 7.0-0 a6 8.a4 c6 9.Na3 (9.Nd4 Be4=+) 9...Qe7 10.Qc1 (10.bc6 Nc6 11.c4 Rfc8=+) 10...Rc8 (10...cb5 11.Nd4 Be4 12.f3-/+) 11.e3 cb5-/+ 12.ab5 ab5 13.Nd4 Bd3-/+ 14.Re1 b4 15.Nab5 Na6 16.Nd6=+ Qd6 17.Bf1 Bf1-/+ 18.Kf1 Qc5 19.f4-/+ Ne4 20.Qd1 Nd6 21.Qg4 g6 22.Kg2=+ Ne4 23.Re2 Qe7 24.Qf3 Nac5-/+ 25.Ra8 Ra8 26.d3 Ra2 27.de4 de4 28.Qg4 Rb2 29.Rf2 f5 30.Qd1 Ra2 31.Qb1 Ra4 32.Qb2 e5 33.Nb3 Ra3 34.Nc5 Qc5 35.fe5 Re3 36.Qa2 Kg7 37.Qe6 Rc3 38.Qf6 Kg8 39.Rd2 Rc2 40.Qd8 ½–½. Dubleumortier,Christian – Frenzel,Lothar, corr 3GMM–37, 1996.

5.g3 Nbd7 6.Bg2 Bd6 7.d4 c5 8.0-0 cd4 9.Nd4= Bg6 10.c4 0-0 11.cd5= e5 12.Nb3 h5 13.N1d2 Rc8 14.e4 h4 15.Rc1 Qe7 16.a4 (16.Qf3 Rfd8+/–) ½–½. Schaefer,Juergen – Machenbach,Armin, Porz op, 1990.

5.Nh4 Bg4 6.f3 Bh5 A) 7.g3 Bc5 (7...Bd6 8.Bg2 0-0 9.Nc3 a6 10.e3 Be5 11.d4 Bd6 12.0-0 c6+=; 7...Nbd7 8.e3 e5 9.c4 e4 10.cd5 ef3 11.Nf3 Nc5 12.Bc4 Nd5=; 7...Be7 8.e3 Ne4 9.Ng2 Bf6 10.d4 Qd6 11.Ba3 Qb6 12.g4 Qa5+/–; 7...a6 8.e3 Bd6 9.Nc3 0-0 10.Ng2 c5 11.Be2 d4 12.ed4 cd4+=; 7...c6 8.e3 Bd6 9.Nc3 0-0 10.Be2 a6 11.a4 b6 12.0-0 Qc7+=) 8.e3 0-0 9.Ng2 d4 10.Bd3 a6 11.a4 e5 12.Ba3 Ba3-/+; B) 7.a4 Be7 (7...Bd6 8.g3 0-0 9.Bg2 Nbd7 10.0-0 a6 11.e3 ab5 12.ab5 Qe7+=; 7...Bb4 8.e3 Bd6 9.g3 0-0 10.Be2 Qe7 11.0-0 a6 12.Nc3 Nbd7+=) 8.g3 0-0 9.e3 a6 10.Nc3 ab5 11.ab5 Ra1 12.Ba1 Nbd7+=; C) 7.a3 Bd6 (7...Nbd7 8.g3 Bc5 9.e3 0-0 10.d4 Bd6 11.c4 Be7 12.Nc3 dc4+=; 7...Be7 8.g3 0-0 9.e3 Nbd7 10.Be2 Nb6 11.0-0 Bd6 12.Nc3 Qe7+=; 7...a6 8.e3 Be7 9.g3 ab5 10.Bb5 c6 11.Be2 Nbd7 12.0-0 0-0+=) 8.g3 0-0 9.e3 c5 10.Be2 a6 11.0-0 ab5 12.Nc3 Be5-/+; D) 7.e3 Bd6 8.g3 0-0 9.Nc3 Nbd7 10.Be2 Nb6 11.0-0 Qe7 12.a4 Rad8+=.

5.Nh4 Bg4 6.h3 Bh5 7.g4 Ne4 8.Nf3 Bg6 9.d3 Nd6 10.a4 (10.Nc3 Be7 11.Bg2 c5 12.e3 Nd7+=) 10...h6 (10...a6 11.Nc3 Be7 12.h4 h5+=) 11.Nbd2 (11.Bg2 c6 12.Ne5 Bh7=) 11...Nd7 12.Nb3 (12.Bg2 Qe7=) 12...c5 (12...Qe7+=) 13.e3 c4 14.Nc1 Rc8 15.Be5? (better is 15.Ne2!?+=) 15...cd3-+ 16.cd3 Ne4! 17.Be2 (17.de4 Bb4 Double attack) 17...Nf2! 18.Kf2 Ne5 19.d4 Nf3 20.Bf3 Qh4 21.Kg2 Bd6 22.Ne2 0-0 23.Qe1 Qe1 (better is 23...Qg5!? 24.Qf2-+) 24.Rhe1 Rc2 25.h4 Rfc8 26.Rec1 Rc1 27.Rc1 Rc1 28.Nc1 Bc2 29.a5 Bb4 30.a6 (30.Be2-+) 30...ba6 31.ba6 Bd2 32.Ne2 Bd3 (better is 32...Be3 33.Kg3-+) 33.Kf2 Ba6 34.e4 Bc4 35.ed5 ed5 36.Ng3 g6 37.Be2 Bf4 38.Bc4 (38.Bd1-+) 38...Bg3 39.Kg3 dc4 40.Kf3 Kf8 41.Ke3 Ke7 42.Ke4 (42.d5-+) 42...f5! 43.gf5 gf5 (43...gf5 44.Kf3 Ke6-+) 0–1. Ilyashyk,Semen – Kurochkin,Val (2395), New Years All–Ukrainian Open, Poltava UKR, 2009.

5.Nh4 Bg4 6.h3 Bh5 7.g4 Ne4 8.Nf3 Bg6 9.d3 Nf6 10.Ne5 (10.Nbd2 a6=) 10...Bb4 11.Nd2 Nbd7 (11...c6 12.Ng6 hg6 13.c3=) 12.Ng6 hg6 13.Bg2 Qe7 (13...a6 14.ba6 Ra6 15.a3=) 14.a3 Bc5 (14...Ba5 15.c4 dc4 16.dc4=) 15.Nb3 (15.c4 Ng4 16.d4 Nf2 17.Kf2 Qh4 18.Ke3 Qg5 19.Kf2 Qh4 20.Ke3 Qg5 21.Kf2 Qh4=) 15...Bb6 (15...0-0-0 16.c4=) 16.Qd2 (16.e3 0-0-0=) 16...Nc5 17.Na5 (17.Rc1 Rh4=) 17...Na4 (17...0-0-0 18.Qb4 e5 19.Nb3+=) 18.Be5= Qc5 19.0-0 (19.e3 Qb5 20.Nb7+=) 19...Qb5-/+ 20.Nb7 (better is 20.Nb3!?-/+) 20...Qa6-+ 21.c4 Qb7 22.Bf6 gf6 23.Qf4 Nc3 24.Rae1 Ke7 25.Qd2 Ba5 26.cd5 Qb6 27.de6 Nd5! 28.Qa2 fe6 29.Rb1 Qd6 30.g5 Rad8 31.Rb5? Nc3 32.Qb2 Nb5 33.Qf6 Kd7 34.Qf7 Qe7 35.Qf4 Bb6 36.Rc1 Nd4 37.Qe4 Qg5 38.Rc4 Rh4 (38...Rh4 39.Qe3 Qe3 40.fe3 Ne2 41.Kf2 Rc4 42.dc4 Nc3-+) 0–1. Rushakov,Anatoly (2015) – Snetkov,Ivan (1865), Ulan–Ude RUS, Buryatia Ch, 2012.

5.e3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 h6).

5.h3 (5.e3 Nf6=) 5...Nf6=+ 6.g4 Bh7 7.Bg2 Be7 8.d3 0-0 (8...a6 9.a4=+) 9.Nh2 (9.g5 hg5 10.Ng5 a6=) 9...Nfd7 (9...c6 10.a4=+) 10.f4 (10.c4!?=+) 10...Bh4 11.Kf1 (11.Kd2 c6-/+) 11...c6 12.a4? (better 12.Nf3!?-/+) 12...Qb6-+ 13.d4 cb5 14.ab5 Qb5 15.Bc3 Nc6 16.Na3 Qb6 17.Rb1 (17.Nf3 Be7-+) 17...Qc7 18.Nb5 (18.Nf3 Be7 (worse 18...Qf4 19.Rb7 Rfd8 20.Bd2-+) 19.Rb3 Ba3 20.Ra3 Qf4-+) 18...Qf4 19.Nf3 Qe3 (better 19...a6 20.Bd2 Qf6-+) 20.Nh4-/+ Nf6?? (better 20...a6 21.Qd2 Qd2 22.Bd2 ab5-+) 21.Bd2 Qg3 22.Be1 Qf4 23.Bf2 (23.Nf3 a6 24.Nc3 b5=) 23...Ne4 24.Be4 Be4 (24...Qe4 25.Nf3 Qc2 26.Qc2 Bc2 27.Rc1=) 25.Rg1 Ne7 (25...Rfc8 26.Nf3=) 26.e3 f6?? (better 26...Qh2 27.Ke1 Rfc8= (worse 27...Qh3 28.Nd6+-)) 27.ef4+- Nc6 (27...Rfc8 28.Rb2 Rc6 29.g5 hg5 30.fg5+-) 28.Nd6 Bh7 29.Rb7 (better 29.g5 hg5 30.fg5 fg5 31.Rg5 Nd8+-) 29...Rab8 30.Rb8 (30.Qe2!? Rb7 31.Qe6 Rbf7 32.Nf7 Rf7 33.Qc6 Be4+-) 30...Rb8 31.c3 (31.Qe2 Nd8 32.g5 hg5 33.fg5 fg5 34.Rg5 Rb1 35.Be1 Rc1+-) 31...Rb2 (31...Rb1 32.Qb1! Bb1+-) 32.Qa4 Rb1 33.Kg2 Be4 34.Ne4 Rg1 35.Kg1 de4 36.Qc6 Kh7 37.Qe6 a5 (37...e3 38.Nf5 ef2 39.Kf2 a5 40.Qd7 a4 41.Qg7) 38.Qe4 (38.Qe7 e3 39.Nf5 ef2 40.Kf2 a4 41.Qg7) 38...Kg8 (38...g6 39.Qg6 Kh8 40.Nf5 a4 41.Qg7) 39.Qb1 (39.Qe8 Kh7 40.Qg6 Kg8 41.Nf5 Kf8 42.Qg7 Ke8 43.Qe7) 39...a4 (39...Kf8 40.Nf5 Ke8 41.Qb7 Kd8 42.Qe7 Kc8 43.Nd6 Kb8 44.Qb7) 40.Qa2 (40.Qa2 Kf8 41.Qe6 g6 42.Ng6 Kg7 43.Qe7 Kg6 44.f5 Kg5 45.Qe3; 40.Qg6 Kf8 41.Nf5 a3 42.Qg7 Ke8 43.Qe7) 1–0. TWW_LONDON – tigerman2020 (1625), lichess.org, 2020.

5.a3 dc4-/+ 6.Ne5 b5 7.Nc3 c6 8.g3 Bd6 9.Nf3 (9.d4 cd3! 10.Nd3 a5-/+) 9...a5-+ 10.ba5 Ra5 11.Bg2 e5 12.0-0 0-0 13.Re1 h6 14.e4 Bg4 15.d3 cd3 16.Qd3 Bf3 17.Bf3 Qe7 18.Ne2 Nbd7 19.Red1 Bc5 20.Kg2 Rfa8 21.Qc2 Nb6 22.Nc1 Ra4 (22...Nc4 23.Nb3 Nb2 24.Qb2 Ra3 25.Qc2 Ra1 26.Na1-+) 23.Nb3 Rc4 (23...Ba3?! 24.Ba3 Ra3 25.Qc6-/+) 24.Qb1 Na4 (24...Ba3 25.Ba3 Ra3 26.Ra3 Qa3 27.Qd3-+) 25.Nc5 Nb2 26.Qb2 Qc5 27.Rdc1 Raa4 28.Be2 Rc1 29.Rc1 Qd6 30.Qc2 Re4 (30...Ra6!? 31.Ra1-+) 31.Bf1-/+ Qa3 32.Qc6 g6 (32...Rd4 33.Bb5 e4 34.Qc8 Qf8 35.Qc7-/+) 33.Bb5 (33.Rd1!? Kg7 34.Rd6=) 33...Kg7-/+ 34.Qc7 Nd5 35.Qc6 Rd4 36.Re1 (36.Rc5 Qa2 37.Rc2 Qb3-/+) 36...e4-+ 37.Re4 Re4 38.Qd5 Qe7 39.Bc4 Re1 40.Bd3 Qf6 41.Qc4 Qa1 42.Bf1 Qa5 43.Kg1 Qe5 44.Qa6 Qd4 45.h4 Ra1 46.Qe2 Ra3 47.Bg2? (better is 47.Kh2-+) 47...Rg3 48.h5 g5 49.Kh2 Rb3 50.Be4 Rb2 (50...Rb2 51.Bc2 Qc5-+) 0–1. Macura,Emil (2150) – Kotan,Ladislav (2360), Stare Mesto op, 2005. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6 4.c4 Nf6)

5.Qb3 Nc6 6.c5 =+.

5.Qb3 Be7 6.d3 0-0 7.Nbd2 Nbd7 8.Nh4 Bg4 9.f3 Bh5-/+ 10.0-0-0 c5 11.a3? cb4-/+ 12.ab4 a5 13.g3? Bb4-+ 14.Ng2 Nc5 15.Qc2 d4 16.Nb3 a4 17.Nd4 a3 18.Ba1 Qa5 19.g4 Bg6 20.h4 h5 21.Nf4 a2 22.Nb5-/+ hg4 23.Ng6 fg6 24.d4 Ncd7 25.e4 gf3 26.e5 Nd5 27.Qg6? Ba3 28.Kc2 Ne3 29.Kd3 Nd1 30.Rg1 Ne5! 31.de5 Rad8 32.Nd4-+ Qe5 (33.Kc2 Bb2 34.Bb2 Nb2-+; 32...Rf7 33.Bh3 Nf2 34.Kc2 Qa4 35.Kd2 Qc4 36.Qf7 Kf7 37.Be6 Qe6 38.Ke3 Qe5 39.Kf3 Rd4 40.Bd4 Qe4 41.Kf2 Qd4 42.Ke2 Qg1 43.Kf3 Qf1 44.Ke4 a1Q 45.h5 Qe2 46.Kd5 Qae5) 0–1. ooioo (2265) – oleksandrlozitskiy (2220), net–chess.com, 2005.

5.b5 c6 6.a4 Nbd7 7.e3 Nb6 8.Qb3 dc4 9.Bc4 Nc4 10.Qc4 Bd3 11.Qb3 Ne4 12.Bd4 Bb1 13.Qb1 Qd5 14.0-0 c5 15.Bb2 Rd8 16.Rd1 f6 17.d3 Ng5 18.e4 (Better is 18.Ng5 Qg5 19.d4=) 18...Nf3-/+ 19.gf3 Qg5 20.Kh1 Bd6 21.Rg1 Qh5 22.Rg2 Qf3 23.Qc2 h5 24.d4 cd4 25.Bd4 h4 26.Kg1 h3 27.Rg7 Kf8 28.Rg3?? Bg3-+ 29.fg3 Rd4 30.Re1 Qg2 31.Qg2 hg2 32.Kg2 Ra4 33.b6 ab6 34.h4 Rg8 35.Re3 0–1. Adam,Hanna – Nagel,Verena (1945), Bayern chw GER, 2000.

5.cd5 ed5 6.Qa4 c6 +=.

5.c3 Ba5 6.Nbd2 Nf6 7.Nd4 Bg6 8.Qa4 c6 9.g3 Nbd7 10.Bg2 0-0 11.0-0 e5 12.N4b3 Bb6 13.Qh4 Ne8 (13...e4 14.d4-+) 14.Nf3? (better is 14.Qd8!? Rd8 15.Ba3=) 14...Qh4-/+ 15.Nh4 Bh5 16.Rfe1 f5 17.Nf3 Nef6 18.d4 e4 19.Nfd2 Bc7 20.e3 g5 21.c4 f4 22.ef4 gf4 23.cd5 cd5 24.Bh3 Bg4 25.Bg4 Ng4 26.Rac1 Bd6 27.Nc5 (27.Bc3 Rae8-+) 27...Nc5 (better is 27...fg3 28.fg3 Bc5 29.dc5 Rf2-+) 28.dc5 Bc7 29.Nb3?? (better is 29.Ne4 de4 30.Re4-+) 29...fg3 30.fg3 Rf2 31.Bc3 Rh2 32.Nd4 (32.Rcd1 Rh3 33.Rd2-+) 32...Bg3 33.Re2 Bf2 34.Rf2 Rf2 0–1. pdchessvamp – Snicks, ChessWorld.net, 2012.

5.c3 Be7 6.Nbd2 Nf6 7.e4 (7.Rb1 0-0-/+) 7...de4-+ 8.de4 Ne4 9.Qa4 Qd7 10.Bb5 c6 11.Be2 Nc5 12.Qd1 Nd3 13.Bd3 Bd3 14.Ne5 Qd5 15.Ndf3 (15.Nd3 Qd3 16.Qg4-+) 15...Qe4 16.Kd2 Ba6 17.Re1 Qd5 (17...Qf4 18.Kc2-+) 18.Kc2 Qd1 (better is 18...Bc5!? 19.Qd5 cd5 20.c4 dc4 21.Bd4-+) 19.Rad1 0-0 20.Re4 b6 21.c4 Bb7 22.Rg4 f6 23.Nd3 c5 24.Nf4 Kf7 25.Nh5 (25.Rg3 Be4 26.Kc1 Nc6-+) 25...g6 26.Ng3 (26.Nf4 g5 27.Nd3 Bd6-+) 26...Nc6 (better is 26...Bf3 27.gf3 f5 28.Nf5 ef5-+) 27.Rf4 Nb4 28.Kb3 Bf3 29.gf3? (29.Rf3 Rfd8 30.Rd8 Rd8 31.Bc3-+) 29...f5 30.h4 Rfd8 (30...Rfd8 31.Rd8 Rd8-+) 0–1. Boava,Diego – Umetsubo,Otavio, Paulisto–ch Americana, 1998. (=1.Nf3 d5 2.b4 Bf5 3.d3 e6 4.Bb2 Bb4)

5.Nbd2 c6?? 6.Bg7+- Nf6 (6...Bc3 7.Bc3 f6 8.Nd4+-) 7.Bh8 Bc3 8.Rb1 b5 9.e3 Qa5 10.Rb3 (10.Nd4 Bd4 11.ed4 Nbd7+-) 10...b4 (10...Bg4 11.Be2+-) 11.Bf6 (11.Nd4 Nfd7 12.Nf5 Bh8 13.Nd6 Ke7+-) 11...Bf6 12.e4 (12.Qb1 c5+-) 12...de4 (12...Bg4 13.Qb1 Bf3 14.Nf3 de4 15.de4+-) 13.de4 (worse 13.Ne4 Be4 14.de4 Bc3 15.Rc3 bc3+-) 13...Bg4 14.h3 Bh5 (14...Bf3 15.Qf3 (worse 15.Nf3 Bc3 16.Rc3 bc3+-) 15...Nd7 16.a3 ba3 17.Ra3+-) 15.g4 Bg6 16.Bd3 (16.h4 h6+-) 16...Bc3 17.0-0 Qa2 18.Nc4 White prepares the advance e5 (better 18.Nb1 Bg7 19.Rb4 Nd7+-) 18...Kd7 (18...Nd7 19.e5 Rd8 20.Nd6 Ke7 21.Nb7+-) 19.Nce5 (better 19.h4!? h5 20.gh5 Bh7+-) 19...Ke7 20.Ng6 (20.h4 f6 21.Ng6 hg6+-) 20...hg6 21.e5 Nd7 (21...Qa5 22.Bg6! Qd5 23.Be4 Qd1 24.Rd1+-) 22.Qe2 (better 22.Be4 Be5 23.Bc6+-) 22...Qa5 23.Bc4 Ne5 (23...Rh8 24.Rd1+-) 24.Ne5 (better 24.Rc3 bc3 25.Ne5 Qc7+-) 24...Be5 (24...Qe5 25.Qe5 Be5 26.Rb4+-) 25.f4 (25.Re3!? f6+-) 25...Bd6 (25...Bc3 26.f5 Qc7 27.Rf3 gf5 28.gf5 Rg8 29.Kh1+-) 26.Kg2 Qc5 (26...Qc7 27.f5 gf5 28.Rf5+-) 27.Re1 (27.f5 Rg8 28.fg6 Rg6+-) 27...Qd4? (27...Bf4 28.Rd3 Re8+-) 28.Qe3 (better 28.Be6 a5 29.Bf7 Kf7 30.Qe6 Kg7 31.Rd3+-) 28...Qc4-/+ 29.Re2 (29.Qf2 Bc5 (29...Qf4?! 30.Qf4 Bf4 31.Rb4=+) 30.Qh4 Ke8 31.Qh8 Bf8-/+) 29...Bf4 30.Qe4 (better 30.Qf2-+) 30...Qe4 31.Re4 Bd6 32.g5 (32.c3 c5-+) 32...a5 33.Rd3 Rd8 (33...a4 34.Kf3-+) 34.c3 (34.Kf1 a4-+) 34...b3 35.Ra4 (35.Rd1 Rb8-+) 35...b2 (35...Be5!? 36.Rd8 Kd8 37.Ra5-+) 36.Rd1 Rb8 (better 36...Be5!? 37.Rb1 Rd2 38.Kf3-+) 37.Rb1 Be5 (37...Rb5 38.h4 Be5 39.c4-+) 38.c4 (38.Ra5 Bc3 39.Rc5 Bd2-+) 38...Rb4 (38...Ra8 39.c5-+) 39.Rb4 ab4 40.Kf3 b3 (40...Kd6 41.Ke4 f5 42.gf6 Bf6-+) 41.Ke4 Bd6?? (better 41...f6 42.c5 Kf7-+) 42.Rb2+- 1–0. e4_e5_f4 (1720) – Pedro_Garrido (1740), lichess.org, 2021.

5.Nbd2 f6 6.e3 c5 7.Be2 Nc6 8.0-0 b5 9.Nh4 Bg6 10.Re1 Bf7 11.c3 Ba5 12.d4 c4-/+ 13.Bg4? f5-+ 14.Bh5? Qg5 15.Bf7-/+ Kf7 16.Nhf3 Nf6?? 17.Ng5+- Ke7 18.Ngf3 b4 19.Nb1 Ne4 20.Qa4 Kd6 21.cb4 Bb4 22.Rc1 Rhc8 23.Ne5 Rab8 24.Nc6 Rc6 25.Ba3 a5 26.f3 Nf6 27.Nc3 Ba3 28.Qa3 Kd7 29.Qa5 g5 30.Rcb1 Rb1 31.Rb1 Rc7 32.a4 g4 33.Qc7! Kc7 34.a5 gf3 35.gf3 h5 36.a6 (36...Nd7 37.a7+-) 1–0. ftyre – veera (2225), net–chess.com, 2004.

5.Nbd2 Nf6 6.Rb1 Nc6 7.a3 Ba5 8.e3-/+.

5.Nbd2 Nf6 6.Rb1 Bd2 7.Qd2=+ b6 8.Nh4 Bg6 9.Ng6 hg6 10.Qg5 Nbd7 11.h3 c5 12.e3 Qc7 13.Be2 Qd6 Black intends d4 14.0-0 Rc8 15.f4 (15.Rfd1 d4-/+) 15...Rh6 (15...c4 16.dc4 Ne4 17.Qg4-/+) 16.Bf3 (16.Qg3 Qc6=+) 16...Nh7 (16...c4 17.Qg3-/+) 17.Qg3=+ d4 (17...f6 18.e4=+) 18.e4 (18.Qf2 g5 19.ed4 gf4=+) 18...e5 (18...f6!?=+) 19.Bc1= Qe7 20.Bg4 White plans f5 (20.fe5 g5 (worse 20...Qe5 21.Bf4 Qe7 22.Bh6 gh6 23.a3+-) 21.Bg4 Rd8=) 20...Rd8 (20...Nhf6=+) 21.f5 (better 21.fe5!? g5 22.Bd7 Rd7 23.a4=) 21...g5-/+ 22.a4 Rc6 (22...Qf6 23.Bd2-/+) 23.Ba3 (23.Be2 Qf6=+) 23...Nhf6 (23...Qf6!?-/+) 24.Be2 Ng8 25.h4 (25.Bc1!?=) 25...gh4=+ 26.Qg7 Qf8 27.Qg5 (27.Qf8 Kf8 28.Rf3 Rh6=+) 27...Rh6 28.Bg4 (28.Rf3 Ngf6-/+) 28...Ngf6-+ 29.Bh3 Ke7 (29...Rh5 30.Qd2-+) 30.a5 Rh5 (30...ba5?! 31.Rb7 Ke8 32.Ra7=+) 31.Qd2 Qh6 32.Qe2 Rg5 (worse 32...ba5 33.Rb7=+) 33.Bc1 Qh5 34.Qd2 (34.Qh5 Rh5 35.ab6 Nb6-/+) 34...Rdg8 35.ab6 ab6 (worse 35...Nb6 36.Qa5 Rg2 37.Bg2=) 36.Rf2 Rg3 37.Kh2? (better 37.Kf1-+) 37...Ng4 38.Bg4 Qg4 39.Qe2 Qe2 (better 39...Rh3! 40.Kg1 Qg3-+) 40.Re2 Kd6 (40...Ra8 41.Bd2 Ra2 42.Rd1-+) 41.Ra1 (41.Bd2 Kc6-+) 41...Kc6 42.Bd2 Nf6 43.Be1 Ng4 44.Kh1 (44.Kg1 Re3 45.Rd2 c4 46.Bh4 c3-+) 44...Re3 45.Re3 Ne3 (45...de3?! 46.Bh4 c4 47.dc4-/+) 46.Bh4 Rg2 47.Ra7 Rg7 (47...Rc2 48.Rf7 Rd2 49.Rg7 Rd3 50.f6 Rd1 51.Kh2-+) 48.Bf6 (48.Kh2 Nc2 49.Bf6 Rh7 50.Kg3 Ne1 51.Be5 Nd3-+) 48...Rh7 49.Kg1 Ng4 (49...Nc2!? 50.Be5 Ne1 51.Bf6 Nd3 52.e5-+) 50.Bd8 Kb5 (50...Rh8 51.Bg5-+) 51.Rb7 (51.Ra2 Rh6-/+) 51...c4 (51...Kb4!? 52.Bb6 Kc3-+) 52.Rb6-/+ (52.Bb6? Kc6 53.Rb8 cd3 54.cd3 Rh3-+) 52...Kc5 53.Rb7 cd3 (53...c3 54.Rc7 Kd6 55.Ra7-/+) 54.cd3=+ Nh2 (54...Rh8 55.Bg5 f6 56.Bd2=+) 55.Kg2 Ng4 56.Be7 (56.Kg3 Rg7=) 56...Kc6 57.Rb3 f6 58.Bd8 Rd7 59.Ba5 (59.Rb6 Kc5 60.Rb8 Rg7=) 59...Ne3 60.Kf3 Rf7 (60...Kc5!?=) 61.Rb6+= Kc5 62.Re6 Rf8 (62...Rh7 63.Bd8+-) 63.Bc7 Kb5 64.Bd6 Rf7 (64...Rh8 65.Rf6 Rh3 66.Ke2 Rh2 67.Ke1 Nc2 68.Kf1 Ne3 69.Kg1 Rg2 70.Kh1+-) 65.Be7 (65.Re7 Re7 66.Be7 Kc6+-) 65...Rh7+- 66.Bf6 Rh3 67.Kf2 Ng4 68.Ke2 Rh2 69.Kf3 Nf6 70.Rf6 Rd2 71.Rd6 (71.Re6!? Rd3 72.Kg4+-) 71...Rd3 72.Kf2 Kc4 (72...Rd2 73.Ke1 Rh2+=) 73.Rd5 (better 73.Rc6 Kb4 74.Re6 Rd2 75.Kf1+-) 73...Rd2= 74.Ke1 (better 74.Kg3!? Rd3 75.Kh4=) 74...Kd3-/+ 75.Re5 Ke3 76.f6 Ra2 77.Kf1 d3 (77...Rf2 78.Ke1 Rf6-+) 78.Rd5?? (78.Rf5 d2 79.Rd5 Ra1 80.Kg2-+) 78...Rf2-+ 79.Ke1 Rf6 80.Rf5 (80.e5 Ra6 81.Kf1-+) 80...Ra6 81.Kf1 Ra1 (81...d2 82.Rd5-+) 82.Kg2 d2 83.Rf3 (83.Rd5-+) 83…Ke4 (83...Ke4 84.Rf6 d1Q 85.Re6 Kf4 86.Rf6 Kg5 87.Rg6 Kg6 88.Kg3 Ra3 89.Kf2 Qd2 90.Kf1 Ra1) 0–1. Rtishchev,Viktor I – Tikhonov,Yuriy A (1715), Russia, 2018. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6 4.d3 Bb4)

5.Nbd2 Nf6 6.g3 Bd6 7.Bg2 0-0 8.c4 c6 9.Nh4 Bg6 10.0-0 Nbd7 11.Ng6 fg6 12.Rb1 b6 13.cd5 cd5 14.e4 Rc8 15.f4 Be7 16.Qe2 Nc5 17.Rbc1 Qd7 18.Rfd1 Rfe8 (18...Na4 19.Be5-/+) 19.Kh1 Qb7 20.h3 Qa6 21.Bf6 (21.ed5 Qd3 22.Qd3 Nd3 23.Rc8 Rc8 24.Bf6 gf6+=) 21...gf6 22.ed5 Qd3 (worse is 22...Qa2 23.d4 Qa6 24.Rc4+/–) 23.Qd3 Nd3 24.Rc8 Rc8 25.Rf1 (better is 25.Ne4!? Nb2 26.d6 Nd1 27.de7 Nf2 28.Nf2+=) 25...Rc2-+ 26.Nb3 e5 27.fe5 Ne5 (better is 27...fe5!? 28.a4 Ra2-+) 28.Nd4+= Ra2 29.Nc6? (better is 29.d6!? Kf8 30.Ne6 Kf7 31.de7 Ke7 32.Nc7=) 29...Nc6 (29...Bc5 30.Rf6 Nc4 31.d6 Nd6 32.Bd5 Kg7 33.Rg6 hg6 34.Ba2-+) 30.dc6-/+ Rc2 31.Re1 (31.Rd1 Kf8-+) 31...Kf8 32.Ra1 (32.Be4 Rc3-+) 32...a5 33.Rb1 Bb4 (33...Bd6 34.Rb6 Bg3 35.Bf3-+) 34.Rd1 a4 35.Rd8 Ke7 36.Rd7 Ke8 37.Rh7 (37.Be4 Rc1 38.Kg2-+) 37...Kd8 (37...a3 38.Be4 Rc1 39.Kg2-+) 38.Rb7? (better is 38.Be4 Rc4 39.Bd5-/+) 38...a3-+ 39.Rb8 Kc7 40.Rb7 Kc8 41.Ra7 (41.Bd5 Rc6!! 42.Rg7 Rc1 43.Kg2 a2 44.Ba2 Rc2 45.Kf3 Ra2 46.Rg6 Bc3-+) 41...Ba5 (better is 41...a2 42.Bd5 Rc1 43.Kg2 a1Q 44.Ra1 Ra1-+) 42.Ra8 Kc7 43.Ra7 Kb8 44.Rb7 Kc8 45.Rd7 (45.Bd5 Rc6!! 46.Rf7-+) 45...Rc1 46.Kh2 a2 0–1. jlbaf (2435) – mpenga (2530), net–chess.com, 2016.

5.a3 a5 6.b5 c5 7.bc6 Nc6 8.e3 Bd6 9.Be2 0-0 10.0-0 Bg4 11.Nbd2 Qb8 (11...b5 12.c4 bc4 13.dc4=) 12.h3 Bf3 13.Nf3 e5 14.c4 dc4 15.dc4 Rd8 16.Qc2 Re8 17.Rfd1 Bc7 18.Bd3?? (better is 18.Rab1+=) 18...e4-/+ 19.Nd4 (better is 19.Bf6!? ed3 20.Qd3 gf6 21.Qf5-/+) 19...Nd4 20.Bd4 ed3 21.Rd3 Bd6 (21...Bh2 22.Kh1 Be5 23.Rb1-+) 22.a4? (better is 22.Bf6!? gf6 23.Rad1-/+) 22...Bh2-+ 23.Kf1 Be5 24.Rad1 (24.Kg1-+) 24...Bd4 25.Rd4 Qe5 26.Qb3 Rac8 27.Qb7 Rb8 28.Qa6 Qh2 29.Qa5 Qh1 30.Ke2 Qg2 31.Rd8 Qh3 32.Rb8= Rb8?? 33.Rd8+- Ne8 34.Rb8 Qh5 35.Qh5 (35.Qh5 h6 36.Re8 Kh7 37.Qf5 g6 38.Qf7) 1–0. Fournier,Frederic (1765) – enciclopedia (1665), Active, 2006.

5.a3 Be7 6.Nbd2 0-0 7.c4 dc4 8.Nc4 c5 9.b5 b6 10.h3 Nbd7 11.e4 Bg6 12.Be2 Nh5 13.0-0 Ndf6 14.Rb1 Nf4 15.Nfe5+= Ne2 16.Qe2 Nh5 17.Nc6+/– Qc7 18.Be5+- Qd7 19.Ne7 Qe7 20.g4 Nf6 21.Bd6 Qd8 22.Bf8 Qf8 23.f4 h6 24.f5 ef5 25.gf5 Bh7 26.Qf3 Rd8 27.Rbd1 Qe8 28.a4 Nd7 29.Qg3 g5 30.fg6 fg6 31.Nd6 Qe5 32.Qe5 Ne5 33.Nc4 Nf7 34.Kg2 g5 35.Kh2 Kg7 36.Kg3 Bg6 37.Rd2 h5 38.Kf3 Rf8 39.Ke3 Rd8 40.Rdf2 Rd4 41.Nb2 Rb4 42.Kd2?? Rb2-+ 43.Ke3 Rb4 44.Rf6 Ra4 45.Rc6 Ne5?? 46.Rc7 Kh6 47.Rf8 g4-+ 48.h4 Ra3?? 49.Rh8+/– Bh7 50.Rhh7 Kg6+- 51.Ra7?? Rd3= 52.Kf4 Nf3?? 53.Rhg7 Kf6 54.Rh7?? Ne5-/+ 55.Rh6 Ng6 56.Rg6 Kg6 57.Ra6 Rf3 58.Ke5 Rf6 59.Ra3 Rf3 60.Ra6-+ Rf6?? 61.Ra3-/+ Rf3 62.Ra6= ½–½. coloplayah (1990) – wmalone (2100), net–chess.com, 2005.

5.c3 Bd6 6.Nbd2 Be4 7.Ng5?? Qg5-+ 8.f3 Qh4 9.g3 Bg3! 10.hg3 Qh1 11.fe4-+ de4 12.Qa4 Nd7 13.Rd1 e3 14.Nf3 c6 15.Bc1 Qh6 16.Rd3 Ne7 17.Be3 Qg6 18.Bh3 Qg3 19.Bf2 (19...Qh3 20.Qb3-+). smurrell (1645) – phzzzt, net–chess.com, 2003.

5.c3 Bd6 6.e3 h6 7.Be2 Nd7 8.0-0 Ngf6 9.Nbd2 0-0 10.c4 c6 11.cd5 ed5 (worse is 11...Nd5 12.e4+/–) 12.h3 Re8 13.Nh2 Nf8 14.Nb3 N8h7 15.Bc1 Ne4 16.Qc2? (better is 16.Bb2-+) 16...Ng3 17.Qd1 Nf1 18.Bf1 Bh2 (18...Nf6 19.Nf3-+) 19.Kh2 Ng5 20.f4 (20.Ba3 Qf6-+) 20...Ne4 21.Qf3 Bh7 22.Bb2 Nd6 23.Nd2 (23.Rc1 Qf6-+) 23...Be4 (better is 23...Nf5!? 24.Re1-+) 24.Ne4 Ne4 25.Bd3 Qa5 26.Qe2 Qd2 27.Bc1 Qe2 28.Be2 Rac8 29.Bg4 Rc7 30.a4 a5 31.Ra3 (31.Be2 b6-+) 31...g6 (31...b5 32.Bf5-+) 32.Bf3 f5 (32...b5 33.Be4 Re4 34.Rc3 ba4 35.Rc5-+) 33.Rb3 (33.Be4 Re4 34.Bd2 Rce7-+) 33...Kf7 (33...b5 34.Be4 Re4 35.Rc3 ba4 36.Rc5-+) 34.h4 (34.Be4 Re4 35.Ba3 Rd7-+) 34...Ke6 (34...b5 35.h5-+) 35.g4 (35.Be4 de4 36.Bd2 Ra8-+) 35...Rg8 (35...fg4 36.Bg4 Kf7 37.Ba3-+) 36.g5 (36.Be4 de4 37.Bd2 fg4 38.Ba5 Rh7-+) 36...hg5 37.fg5 (37.Be4 fe4 38.fg5 b5-+) 37...Rh8 38.Be4 fe4 (38...Rh4!? 39.Kg3 Rg4 40.Kf2 fe4 41.Bd2 Rf7 42.Ke1 Rg1 43.Ke2 Rg2 44.Ke1-+) 39.Kg3 Rch7 40.Bd2 Rh4 41.Ba5 Kf5 (41...Rh3 42.Kg2 R3h5 43.Bc7 Rg5 44.Kf2-+) 42.Kf2 (42.Rb7 Rh3 43.Kf2 Rf3 44.Kg1 Re3 45.Rf7 Kg4-+) 42...Rh2 43.Ke1 (43.Kg1 R2h7 44.Be1-+) 43...Ra2 44.Kd1 Rh1 (44...Rh1 45.Be1 Ra1 46.Kd2 Rh2 47.Kc3 Re1-+) 0–1. JAY2PLAY – whitecat25, ChessWorld.net, 2015.

5.Nb3 a6 6.h4 h6 (6...Bb4?? 7.Bg7 Be7 8.Bh8 Bh4 9.e3+-) 7.e3 Nf6 8.c3 Nbd7 9.g4 (9.h5 Bf5=+) 9...Be7 (9...Ne5 10.f3-/+) 10.h5 Bh7 11.f3 Nb6 12.Na5 Rb8 13.b5 (13.d3 c5-/+) 13...ab5 14.Bb5 c6 15.Be2 Nbd7 16.Nb3 Nc5 17.Nc5 Bc5 18.d4 Bd6 19.Nd2 Bg3 20.Kf1 Bd6 21.a4 0-0 22.a5 Ra8 23.Nb3 Nd7 24.Bd3 Bd3 25.Qd3 c5 26.c4 cd4 (26...Qf6 27.Kg2-/+) 27.ed4 (better 27.cd5!? de3 28.de6=) 27...dc4-/+ 28.Qc4 Rc8 29.Qd3 Nf6 30.a6 (30.Ba3!?-/+) 30...ba6-+ 31.Ra6 Nd5 32.Kf2?? (32.Ra5 Qf6-+) 32...Nf4 (better 32...Nb4 33.Qe2 Na6-+) 33.Qd2 e5?? (better 33...Rb8 34.Nc1 Rb6 35.Rb6 Qb6-+) 34.Rd6?? (better 34.de5 Be5 35.Qd8 Rfd8 36.Be5 Nd3 37.Kg3 Ne5 38.Rc1=) 34...Qd6-+ 35.de5 (35.Rd1 Rfd8-+) 35...Qb6 (35...Qd2 36.Nd2 Nd3 37.Kg3 Nb2 38.Ra1-+) 36.Nd4? (better 36.Bd4 Qb3 37.Qf4-+) 36...Ne6 37.Kg3 Rcd8 (better 37...Rfd8 38.Rd1 Rd5-+) 38.Rd1 Qc5 (38...Rd7 39.Qc3 Rb8 40.Ba1-+) 39.Qf2 (39.Qe3 Rfe8-/+) 39...Nd4 40.Bd4 Qc4 41.Rd2 Rd7 42.Be3 Rd2 43.Qd2 Qe6 44.f4 Re8 45.Qd4 f6 46.Kf3 fe5 47.Qa4? (47.fe5 Qe5 48.Qe5 Re5-+) 47...e4 (47...ef4 48.Bc5 Rc8 49.Bd4-+) 48.Kg3 Qd5?? (better 48...Rd8-+) 49.Qe8+- Kh7 50.Qg6 (50.g5 hg5 51.fg5 Qg8 52.Qe4 Kh8+-) 50...Kg8 (50...Kh8 51.Kh4 Qd8 52.g5 hg5 53.fg5 Qb8 54.Qe4 Qh2 55.Kg4 Qe2 56.Qf3 Qc4 57.Kg3 Qe6+-) 51.Qe8 Kh7 52.Qg6 (52.g5 hg5 53.fg5 Qg8 54.Qe4 Kh8+-) 52...Kg8 53.Qf5 (better 53.g5 Kf8 54.gh6 gh6 55.Qh6 Ke8 56.Qg6 Kd7+-) 53...Qd3 54.Qc5 Kh7 (54...Qb1 55.Qd5 Kh8 56.g5 hg5 57.fg5 Qe1 58.Bf2+-) 55.Qd4 (55.g5 hg5 56.fg5 Kg8 57.Qc8 Kf7 58.g6 Kf6 59.Qc6 Kf5 60.Qc5 Kf6+-) 55...Qc2 (55...Qb1 56.g5 hg5 57.fg5 Qe1 58.Kf4 Qh4 59.Ke5 Qh5 60.Qe4 (worse 60.Ke4 Qg6 61.Kf4 Qf7 62.Kg3 Qf5+-) 60...Kg8 61.Kd6 Qh2 62.Kd7 Qh3 63.Kd8 Qg2 64.Qg2 Kf7 65.Qc6 g6 66.Qf6 Kg8 67.Qg6 Kf8 68.Bc5) 56.f5 (56.g5 hg5 57.fg5 Qc7 58.Bf4 Qe7 59.g6 Kh8+-) 56...Qc7 57.Bf4 Qb7 58.Bd6 (better 58.Be5 Qb3 59.Qc3 Qb6+-) 58...Qb3 59.Kf4 Qf3 60.Ke5 e3 (60...Qg4 61.Qe4 Qh5 62.Kd4+-) 61.Qd3 (better 61.Qe4!? Qe4 62.Ke4 e2+-) 61...Qg3 62.Kd5 (62.Kd5 Qg4 63.Be5+- (63.Qe3?! Qf5 64.Be5 Qh5+-)) 1–0. beatmeeasy (1950) – shatarchin1 (1875), lichess.org, 2020.

5.Nf3 h6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+-) 6.Ne5 Bh7 7.e3 Nf6 8.c4 dc4 9.Bc4 Bb4?? (Better is 9...Nbd7=+) 10.Qa4+- Nc6 11.Nc6 Bb1 (11...bc6 12.Qb4 Rb8+-) 12.Nd8 (12...Kd8 13.Rb1+-) 1–0. cagey – joeadd, Live Game Caissa's Web, 2004.

4.e3 (--> 3.e3 e6 4.Nf3).

4.e3 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.Nf3 e6).

4.e3 h6 5.a3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 h6).

4.e3 h6 5.c4 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 h6).

(--> 3.e3 e6 4.Nf3 Nd7).

5.a3 Ngf6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 Ngf6 6.d4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d4).

5.c4 dc4 6.Bc4 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7).

5.c4 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.Be2 Ngf6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6).

5.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.a3 c5 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 c5 6.c4).

5.a3 c6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.a3 c6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

5.a3 Bd6 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3 Bd6).

5.a3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.b5 c6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5).

5.b5 Bd6 6.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6).

5.b5 h6 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6).

5.c4 Nbd7 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.Bg7 f6 6.Bh8 Qe7 7.c3 Bd6 8.Bg2 (8.Nd4!? Bg6 9.Bh3 e5+-) 8...Nd7 9.d4 (9.Nd4 Nh6 10.d3 0-0-0+-) 9...0-0-0 10.Nbd2 (better is 10.Nh4!? Nh6 11.Qc1 Qf8+-) 10...Nh6 11.Bf6! Qf6 (11...Nf6 12.Nh4; 11...Qf6 12.Nh4) 12.Qb3 Nb6 13.a4 Rg8 (13...c5 14.a5 Na8 15.c4+-) 14.Nh4 (14.a5 Na8+-) 14...c5 15.Nf5 Nf5 16.e4 de4 17.Ne4 Qe7 18.Nd6 Qd6 19.dc5 Qe5 20.Kd2 Rd8 21.Kc1 Qc5 22.Ra2 Ng7 23.Rd1 Rf8 24.a5 Nd5 25.Bd5 ed5 26.Qd5 Qc3 27.Rc2 Qc2 1–0. Stolarczyk,Anna (1900) – Paterek,Joanna, Elk Poland, 2000.

5.Bg7 Nf6 6.Bh8 +-.

5.a3 c6 6.Bg2 a5 7.ba5 Ra5 8.d3 h6 9.0-0 Nbd7 10.Nbd2 Nc5 11.Bc3 Ra6 12.Bb4 Be7 13.c4 0-0 14.Qc2 Nfd7 15.Rfb1 Qc7 16.cd5 ed5 17.Nd4 Bg6 18.N2b3 Nb3 19.Nb3 Bb4 20.ab4 Ra1 21.Ra1 Qb6 22.Qc3 Re8 23.Ra2 Bh5 24.e3 Ne5 25.Nd2 Be2 26.d4 Nd7 27.h3 Rb8 28.g4 Qd8 29.Nf1 Bc4 30.Ra1 Ra8 31.Ng3 Nb6 32.Ra5 Ra6 33.Nf5 g6 34.Ng3 Na4 35.Qd2 Ra5 36.ba5 Qe7 37.Bf3 Qa3 38.Be2 Nc3 39.Bc4 dc4 40.e4 Nb5 41.d5 c3 42.Qd3 Qb2 43.Kg2 Qd2 44.Qc4? c2 45.Ne2 Nd6 46.Qc5 Qe2 (46...Qe2 47.dc6 Qe4 48.Kh2 Qf4 49.Kg2 c1Q 50.Qc1 Qc1 51.cb7 Nb7-+) 0–1. Uddin,S (2175) – Rahman,SM (2290), Parachute Advansed Int, Dhaka BAN, 2010.

5.a3 c6 6.Bg2 Be7 7.0-0 0-0 8.d3 Nbd7 9.Nbd2 Qc7 10.Nh4 Bg6 11.e4 (11.Ng6 hg6 12.Nf3 Ng4=) 11...de4 (11...Bh5!? 12.Qe1 a5=+) 12.Ng6= hg6 13.de4 Kh7 (13...a5!?=) 14.Qe2+= Rh8 15.e5 Nd5 16.c4 N5b6 17.f4 Kg8 (17...Na4!? 18.Ne4 Nb2 19.Qb2 Rhd8+=) 18.Ne4+- a5 19.Nd6 (19.c5!? ab4 20.ab4 Ra1 21.Ra1+-) 19...Na4 (19...Bd6? 20.ed6 Qb8 21.Rfd1+-) 20.Rad1 Nb2 21.Qb2 Bd6 22.Rd6 Nb6 23.Qd4 ab4 24.ab4 Ra4?? (better 24...Kh7+-) 25.f5!+- Rh6 (25...ef5 26.Rd8 Combination; 25...gf5 26.Rd8 Combination) 26.fe6 fe6 (26...c5 27.bc5 Kh7 28.ef7 Qd6 29.Qd6 Nd7 30.Qd7 Ra8 31.e6 Rh5 32.e7 Ra2 33.e8Q Rf2 34.Qg8 Kh6 35.Qh8 Kg5 36.h4 Kf6 37.f8Q Ke5 38.Qfe7) 27.Rd8 Kh7 28.Rff8 (28.Rff8 Ra1 29.Bf1 Rf1 30.Kf1 Qf7 31.Rf7 Rh2 32.Rff8 Rh1 33.Kg2 Rh2 34.Kh2 g5 35.Qg4 Kg6 36.Qe6 Kh5 37.Rh8) 1–0. Drljevic,L (2185) – Grozdanovic,Anastasia (1635), ch–SRB SF Women (9), 2019.

5.a3 Nc6 6.Bg2 Be7 (6...Bd6 7.Nh4=) 7.0-0 (7.Nh4 Be4=) 7...0-0 8.d3 a6 (8...Qd7 9.Nbd2=) 9.Nbd2 b5 (9...Qd6 10.c4=) 10.Re1 (10.Nh4 Bg4=) 10...Rb8 (10...a5 11.a4 Qb8 12.ba5 ba4 13.Bf6 Bf6 14.Ra4 Ra5 15.Ra5 Na5 16.e4=) 11.e4 (11.c4 dc4 12.dc4 Qd7=) 11...de4 12.de4 Bg6 (12...Bg4 13.c4=) 13.Nh4 (13.c4 Qd3+=) 13...e5 (13...Bh5 14.Qc1=) 14.Ng6+= fg6 15.Nf3 Qd1 16.Rad1 Bd6 17.Ng5 (17.c4 bc4 18.Rc1 Nb4 19.ab4 Bb4+-) 17...Nd8 (17...h6!? 18.Nf3 g5+=) 18.Bh3 (18.c4 bc4 19.Bf1 a5 20.Bc4 Kh8+/–) 18...h6 19.Ne6 (19.f4 Re8 20.Nf3 Nf7+/– (20...ef4? 21.e5+-)) 19...Ne6 20.Be6 Kh8 (20...Kh7 21.h3+/–) 21.Ba2 (better is 21.Kg2+/–) 21...c5?? (better is 21...g5+/–) 22.Rd6+- cb4 23.ab4 Ra8 24.Be5 1–0. hsingletary (2120) – dangurgui (1990), net–chess.com, 2008.

5.a3 Bd6 6.Bg2 0-0 7.0-0 c6 8.d3 h6 9.Nbd2 Bh7 10.c4 Qe7 11.Qb3 Nbd7 12.Rfe1 e5 13.cd5 cd5 14.e4 de4 15.de4 b5 16.Nh4 Rac8 17.Nf5 Bf5 18.ef5 Rfe8 19.Nf3 Qd8 20.Rad1 Qb6 21.Qe3 Qe3 22.Re3 Bc7 23.h3 Bb6 24.Re2 e4 25.Nd4 a6 26.Nb3 Ne5 27.Bd4 (worse is 27.Be4 Ne4 28.Re4 Nf3 29.Kg2 Re4 30.Kf3 Ree8-/+) 27...Bd4 28.Rd4 (worse is 28.Nd4 Rcd8 29.h4 Rd7-/+) 28...Nf3 29.Bf3 ef3 30.Re8 Re8 31.Rd3 Re1 32.Kh2 Ne4 33.Rf3 1–0. Vastrukhin,Oleg (2300) – Simokov,Alexey, RUS–chB U18 Dagomys, 2009. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5 4.Nf3 e6 5.g3 Bd6)

5.a3 Be7 6.d3 0-0 7.Bg2 Nbd7 8.0-0 a6 9.c4 c6 10.Nc3 Rb8 (10...a5 11.b5 e5 12.cd5 cd5 13.e4 de4 14.de4=) 11.Re1 dc4 12.e4 Bg4 13.e5 Nd5 14.dc4 Nc3 15.Bc3 c5 16.Qb3 cb4 17.ab4 Nb6 18.Nd4 Qc7 19.h3 Bh5 20.c5 Nd5 21.Bd5 ed5 22.f4 Qd7 23.f5 f6 24.Ne6 Rfc8? (better is 24...Rfe8+/–) 25.Nf4+- Be8 (25...Rd8 26.Nh5 Qf5+-) 26.Nd5 (26.Qd5?! Kh8+-) 26...Kh8 (26...Kf8 27.Ne7 Bf7 28.Qd1 Qe7 29.ef6+-) 27.ef6 Bf6 (27...Bf7 28.Ne7 Qe7+- (28...Bb3?? 29.fg7)) 28.Nf6 Qf7 29.Re8 (29.Ne8?! Qb3 30.Re3 Kg8 31.Ng7 b6=) 29...Qe8 30.Ne8 Re8 (30...Rc7 31.Nc7 Rf8 32.Rd1 h5 33.Qe6 Rf6 34.Rd8 Kh7 35.Qg8 Kh6 36.Bd2 g5 37.Bg5) 31.f6 1–0. marekt – OrthoKuo, ChessWorld.net, 2012.

5.a3 Be7 6.Bg2 0-0 7.0-0 Nbd7 8.d3 c5 9.bc5 Nc5 10.Nbd2 Rc8 11.c4 dc4 12.Nc4 b5 13.Ne3 Bg6 14.Ne5 Qb6 15.Ng6 hg6 16.Ra2 Na4 17.Qb3 Rc7 18.Rb1 Rfc8 19.Bf3 Nc3 20.Nc4 (better is 20.Bc3!? Rc3 21.Rc2 Rc2 22.Nc2=) 20...Rc4-/+ 21.dc4 Nb1 22.Bf6 Bf6 23.Qb1 bc4 24.Be4 (24.Qc1 Qb3 25.Qc2 Rb8-+) 24...c3 25.Kf1? (better is 25.Qc2-/+) 25...c2!-+ 26.Bc2 Qb1 (26...Qb1 27.Bb1 Rc1 28.Kg2 Rb1-+) 0–1. Levadi,David – Banish,K, Detroit East op, 1983. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Bf5 4.g3 e6)

5.a3 Be7 6.Bg2 Nbd7 7.0-0 0-0 8.d3 b5 9.Nbd2 h6 (9...c5!?+=) 10.Nb3 Ne5?? (better is 10...c5+=) 11.Ne5+- Qd6 12.e4! Bh7 (12...de4 13.Re1 Decoy) 13.ed5 Nd5 14.c4 bc4 15.dc4 (worse is 15.Nc4 Qa6+-) 15...Nf6 16.Qd6 Bd6 17.Nf3 (better is 17.Ba8!? Ra8 18.Rfe1 Kf8+-) 17...Rad8 18.Bf6 gf6 19.Rad1 (better is 19.Rfe1+-) 19...Bc2 20.Rd2?? (better is 20.Nbd4 Bd1 21.Rd1+-) 20...Bb3+= 21.c5 Be5 22.Rd8 Rd8 23.Ne5 fe5 24.Rb1 Rd1 25.Rd1 Bd1 26.Bc6 Bh5 27.a4 Kf8 28.Kf1 Ke7 29.Ke1 Bg6 30.Kd2 Kf6 31.b5 Ke7? 32.a5+- Kd8 33.a6 e4?? 34.b6!+- Kc8 35.Bd7! Kb8 36.ba7 Ka7+/– 37.Bc8 h5 38.c6 e5 39.Ke3 f5 40.f3 ef3 41.Kf3 Kb6 42.Bb7 Bf7 43.Ke3 Be6 44.h4 Ka7 45.Kd3 Kb6 46.Ke3 ½–½. islanderfan (1990) – uilebheist (2010), net–chess.com, 2011.

5.b5 Bc5 6.Bd4 Bd4 7.Nd4 -/+.

5.b5 Bc5 6.Bg2 0-0 7.0-0 c6 8.bc6 Nc6 9.d3 Re8 10.Nh4 Bg6 11.Nd2 Ng4 12.Nb3+= Bb6 13.Ng6 hg6 14.e4 Nge5 15.ed5 ed5= 16.Kh1 Qd6 17.f4 Nd7 18.a4 Ne7 19.a5+= Bd8 20.Re1+/– Nf6 21.c4 Rc8 22.a6 b6 23.Nd4 dc4+= 24.dc4 Rc4 25.Nb5 Qd1 26.Red1 Rb4? 27.Bf6+- gf6 28.Na7 b5 29.Nc6 Bb6 30.Nb4 (30...Nc8 31.Nd5+-) 1–0. Gombac,Jan (2205) – Kokol,Peter, SLO–ch U20 Kranj, 2001.

5.b5 c6 6.a4 (6.Nh4 Bg4+=) 6...Be7 (6...Bc5 7.e3+=) 7.Bg2 0-0 8.0-0 Nbd7 (8...a6 9.Nh4+=) 9.d3 (9.Nd4 Qc7=) 9...Qc7 (9...cb5 10.ab5 Qc7 11.Nbd2+=) 10.Nbd2 (10.Nd4 Bg4=) 10...h6 (10...cb5 11.ab5 e5 12.c4+=) 11.c4 (11.Nh4 Bh7=) 11...c5 (11...e5 12.Qc2 cb5 13.ab5=) 12.Qe1 (12.a5 Rfd8=) 12...d4 13.e4 (13.a5 a6 14.b6 Qb8=) 13...de3 14.Qe3 Rad8 15.Ne4 (15.a5 Ng4 16.Qe2 Bf6 17.Bf6 Ngf6= (17...gf6? 18.Nh4+-)) 15...Ng4 (15...e5 16.Ne5 Ne5 17.Nc5-+) 16.Qe2 Ngf6 (16...Nde5 17.Rfd1=) 17.Rfe1 (17.a5 e5=) 17...Rfe8 (17...Ne4 18.de4 Bg4 19.h3=) 18.h3 (18.a5 e5=) 18...Bg6 (18...e5 19.a5=) 19.Bc3 (19.Nf6 Bf6 20.Bf6 Nf6=) 19...Ne4 20.de4 Nf6 (20...e5 21.Rad1=) 21.Ne5+= Bh7 22.f4 Nd7 23.Nf3 Nf6 24.Nd2 Nd7 25.e5 Nf8 26.Ne4 Rd7 27.Red1 Red8 28.Kf2 Kh8 29.Ke1 Ng6 30.Rd7 Rd7 31.Rd1 Qd8 32.Rd7 Qd7 33.Qd2 Qc8 34.Nd6 Bd6 35.ed6 Nf8 36.b6 a6 37.Bf3 Nd7 38.a5 Kg8 39.Qg2+- Nb8 40.Bb7 Qd7 41.Be4 f6 42.Bh7+- Kh7 43.Qe4 Kg8 44.Qd3 Qc6 45.Kf2 Kf7 46.g4 Nd7 47.Kg3 Kg8 48.Kh2 Kf7 49.h4 Qb7 50.h5 Nf8 51.Be1 Qc8 52.Bf2 Qc6 53.Kg3 Nd7 54.Kh2?? Kg8?? 55.Bg3+- Kf7 56.f5 e5 57.Kg1 Ke8 58.Kf2 Kd8 59.Ke2 Kc8 60.Bf2 Kb8 61.Qd5+- Qd5 62.cd5 Kc8 63.Kd3 Nb8 64.Bc5 Nd7 65.Ba3 Kb7 66.Kc4 Kc8 67.Bc1 Kd8 68.b7 Ke8 69.Be3 Kd8 70.Ba7 +-. Carzolio,Luigi (2040) – Rinaldi,Francesco (1645), Genova open Ducale, 2003.

5.b5 Bd6 6.Bg2 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Nbd7 10.0-0 0-0 11.d3 e5 12.Nbd2 c6 13.c4 Qe7 14.bc6 bc6 15.Nh4 Be6 16.Qc2 Ra8 17.Nhf3 Bg4 18.Nb3 h6 19.Bc3 Qe6 20.Na5 Bc7 21.Ra1 Bb6 22.Qa4 (22.cd5 cd5 23.e3 Rc8+=) 22...Nc5 (22...e4 23.Nd4 Ra5 24.Ne6 Ra4 25.Ra4 fe6 26.cd5 Nd5 27.Ba5 ed3 28.Bb6-/+) 23.Qc6 (better is 23.Qb4 Ncd7 24.Qa4=) 23...Ra5!-/+ 24.cd5 (24.Ra5 Qc6 Remove defender; 24.Ba5 Nb3 Double attack (24...Nb3 Decoy; 24...Qc6 Remove defender)) 24...Ra1 (24...Nd5 25.Qe6 Ra1 26.Ba1 fe6 27.Be5-/+) 25.Ba1 Nd5 26.Qa8 Kh7 27.Ne5 Nc7 28.Qf8 (better is 28.Qa3 Nb3 29.Ng4 Na1 30.Qb2+=) 28...Nb3?? (better is 28...Qa2 29.Ng4 Qa1 30.Bf1 h5-+) 29.Ng4 (better is 29.Be4 Bf5 30.Nf7 Na1 31.Ng5 hg5 32.Bf5 Qf5 33.Qf5 Kg8 34.Qg4+-) 29...Na1+/– 30.Be4 g6 31.Nh6 Bd4?? (better is 31...Qf6 32.Ng4 Qe6+/–) 32.Nf7+- Qf6 33.Qh6 Kg8 34.Qg6 (34.e3 Kf7 35.Qh7 Qg7 36.Bg6 Ke7 37.ed4 Qh7 38.Bh7 Nb3+-) 34...Qg6 35.Bg6 Nb3 36.h4 Ne6 (36...Kg7 37.h5+-) 37.e3 Bf6 38.Nd6 Nc1 1–0. Tolmacheva,Eva (1950) – Burdyko,Alexander (2040), Irkutsk City–ch, 2007.

5.b5 Be7 6.Nc3 0-0 (6...d4 7.Nb1 c5 8.Bg2-/+) 7.Nh4 d4 8.Na4 (8.Nb1 c6=+) 8...Be4 (8...Qd5!? 9.Nf5 ef5-/+ (worse 9...Qf5 10.c4=+)) 9.f3=+ Bg6 (9...a6 10.fe4 ab5 11.Nb6=+) 10.Ng6= fg6 11.Bh3 (11.e3 de3 12.de3 Qc8=) 11...c6 (11...e5!?=+) 12.Be6+= Kh8 13.c4 cb5 (13...Qd6 14.Bh3+=) 14.cb5 d3 (14...a6 15.b6+=) 15.Rc1+- Qd6 (better 15...a6+-) 16.Nc5 (better 16.Bc8 Nbd7 17.Bb7 de2 18.Qe2+-) 16...b6=+ 17.Nd3 (17.Bf6 Bf6 18.Qb3 bc5=+) 17...Qe6-/+ 18.Qa4 (18.Qb3 Qb3 19.ab3 Nbd7=+) 18...Rd8 (18...a6 19.e4-/+) 19.Bd4 (19.Qc4 Qc4 20.Rc4 a6 21.ba6 Na6-/+) 19...Bc5 (better 19...a6!?-+) 20.Nc5= bc5 21.Rc5 Nbd7 22.Rc6 Qd5 (22...Qh3 23.Kf2=+) 23.Qc4 (23.Ba7 Ne5 24.Rc2 Nf3 25.Kf1 Ne1-+) 23...Nb6 (23...Qf5!? 24.Qd3 Qd3 25.ed3 Nb6=+) 24.Qd5+= Nfd5 (24...Rd5 25.e3= (worse 25.Bf6 gf6 26.Rf6 Rb5-/+; 25.Bb6?! ab6 26.Rb6 Ra2 27.Rb8 Ng8=)) 25.Be5 (25.Bc5 Na4 26.Kf2 Nc5 27.Rc5 Nb6+-) 25...Nb4= 26.Rc7 Na2? (better 26...Rd7!? 27.Kf2 Rd2=) 27.Rg7+- (27.Bg7?! Kg8 28.Bf6 Rd7 29.Rd7 Nd7=) 27...Re8? (better 27...Rd5 28.Bf6 h5+-) 28.Bb2 Nc4 (28...h5 29.Ra7 Kg8 30.Rg7 Kf8 31.Rg6+-) 29.Bf6 Rf8 (29...h5 30.Rc7 Kg8 31.Rc4+-) 30.Ra7 (better 30.Ba1 h5 31.Ra7 Kg8 32.Rg7 Kh8 33.Rc7 Kg8 34.Rc4 Rfb8+-) 30...Rf6 (30...Kg8 31.Rg7 Kh8 32.Rg6 Rf6 33.Rf6 Rb8+-) 31.Ra8 Kg7 32.Ra2 Rb6 (32...Rf5 33.Kf2 Rb5 34.Rc1+-) 33.Kf2 Rb5 34.Rc1 (34.Rc1 Na5 35.Rc7 Kh6 36.e4+-) 1–0. Winner – Bursa, internet free, 2018.

5.Bg2 Bb4-/+ 6.c4 (6.Nh4 Be4 7.f3 Bg6-/+) 6...0-0 (6...dc4?! 7.Qa4 Nc6 8.Nd4 Bb1 9.Rb1 Bd2 10.Kd2+=) 7.0-0 Nc6 8.Qa4 Nd7 9.cd5 Nc5 (9...ed5 10.a3 Nb6 11.Qb3-/+) 10.Qd1 ed5 11.a3 Ba5. Willen – Zbroja,Tadeusz, corr 3GMMsemi–10, 1998.

6.ba5 Ra5 7.Bg2 c5 8.a4 (8.Nh4 Be4=) 8...Be7 9.Nh4 Be4 10.f3 Bg6 11.c4 (11.Ng6 hg6 12.e4 d4+=) 11...Nc6 (11...Bb1 12.Rb1 g5 13.cd5 gh4 14.de6 fe6 15.f4-/+) 12.Ng6+= hg6 13.Na3 Bd6 14.f4 Nh5 (14...d4!?=) 15.cd5+= ed5 16.Qb3 Nf4? (better is 16...Nf6 17.Qb7 Nb4+/–) 17.gf4+- Qh4 (17...Bf4 18.Bg7 (worse is 18.Bd5 Bd2 19.Kd2 c4 20.Qe3 Kf8 21.Nc4 Rd5 22.Kc1 Qc7+/–; worse is 18.Qd5 Ra4 19.Bg7 Qd5 20.Bd5 Rh2+-) 18...Rh5 19.Qb7+-) 18.Kd1 Qf4 19.Qb7 (19.Bd5 Qa4 20.Bf7 Ke7 21.Qa4 Ra4+-) 19...Nd8 (19...Qa4 20.Nc2 Qb5 21.Qb5 Rb5 22.Bg7 Rh2 23.Rh2 Bh2 24.Bd5+-) 20.Qd5 Qa4 (20...Rh5 21.Qc4 Ra4 22.Qf4 Bf4 23.Bg7 Bh2+-) 21.Nc2 Qc6 (21...Qb5 22.Ra5 Qb2 23.Qe4 Be7 24.Qa4 Kf8+-) 22.Qc6 (22.Qc6 Nc6 23.Bc6 Kd8 24.Ra5+-) 1–0. marekt – Alex1600, internet, 2009.

6.ba5 Ra5 7.Bg2 Nbd7 8.d3 Bd6 9.Nbd2 Qe7 10.Nd4 Bg6 11.N2b3 Ra4 12.Nb5 Be5 13.Qc1 c6 14.Be5 Ne5 (worse is 14...cb5 15.Bc3+=) 15.Nc3 Ra6 16.0-0 0-0 17.Qf4 Ned7 18.Qb4 Qb4 19.ab4 Rfa8 20.Ra6 Ra6 21.Na5 (21.e4 de4 22.Be4 Be4 23.Ne4 b5+=) 21...Ra7 (21...c5 22.Nb5-/+) 22.f4 h6 (22...c5 23.Nb5 Ra8 24.Nb7 cb4 25.Rb1=) 23.h3 Kf8 24.Kf2 Ke8 (24...e5 25.Nb3=) 25.Ke3 (25.e4 h5+=) 25...Kd8 26.Ra1 Kc7 27.g4 h5 28.Bf3 e5 29.fe5 Ne5 30.g5 Nh7 31.Kf4 Nf3 32.ef3 b6 33.Nb3 Ra1 34.Na1 Nf8 35.h4 Kd6 36.Ne2 c5 37.bc5 bc5 38.Nb3 Ne6 39.Ke3 ½–½. Garcia Camejo,Gonzalo – Triana Ruiz,Jose M, corr Giraldilla Cup, 1999.

6.b5 c5 7.a4 (7.Nh4 Be4 8.f3 Bg6=) 7...h6 (7...Nbd7 8.Nh4 Bg4 9.h3=) 8.Bg2= Nbd7 (8...Bd6 9.0-0=) 9.c4 (9.d3 Qc7=) 9...d4 (9...Bd6 10.d3=) 10.d3 Qc7 (10...Qb6 11.Nh4=) 11.Nbd2 (11.0-0 0-0-0=) 11...e5 (11...Bd6 12.0-0=) 12.0-0 0-0-0 13.Nb3 (13.Qc2 Bd6=) 13...b6 (13...Bd6 14.e3+=) 14.Nh4 (14.e3 de3 15.fe3 e4=) 14...Be6+= 15.e3 g5 16.Nf3 Bd6 17.ed4 (17.Nfd2 g4+=) 17...ed4 18.Nfd4 (18.Re1 Rhe8=) 18...cd4-/+ 19.Nd4 Bg4 20.Qd2 (20.Qc2 Rde8+=) 20...Rde8-/+ 21.h3 (21.Rae1 Bb4 22.Bc3 Bc3 (22...Re1?! 23.Re1 Bc3 24.Qc3=) 23.Qc3 Qd6-/+) 21...Bb4 (21...Bh5 22.Rae1-/+) 22.Qc1 (22.Bc3 Bc3 23.Qc3 Bh5+=) 22...Bh5 (22...Be2 23.Ne2 Re2 24.Bc6-/+) 23.Nc6 Bf8 (23...Be2 24.Nb4 ab4 25.Re1 Bd3 26.Qd2+=) 24.Re1 (24.d4 Be2 25.Re1 g4+=) 24...Rg8 (24...Bd6 25.Bf6 Nf6 26.Qc3=) 25.Re8 Ne8 26.Qe3 Bd6 27.Re1 Nef6 28.Ne7 Be7+= 29.Qe7 Ne8?? 30.Qe8+- Re8 31.Re8 Qd8 32.Rd8 Kd8 33.Bg7 Nc5 34.Bh6 Na4 35.Bg5 Kc7 36.Bf4 Kd7 37.Bc6 Ke6 38.d4 1–0. Wall,Bill – Russell,Bob, San Antonio, TX, 1992.

6.b5 Bc5 7.Bg2 +=.

6.b5 Be7 7.Bg2 0-0 8.0-0 c6 9.bc6 bc6 10.d3 Qb6 11.Qc1 Nbd7 12.Nbd2 a4 13.c4 Rfc8 14.Re1 Bc5 15.d4 Bf8 16.Nh4 Rab8 17.Bc3 (worse is 17.Nf5 Qb2 18.Ne3 Qd4-+) 17...c5 18.Nf5 ef5 19.Rb1 Qa7 20.Rb8 (20.cd5?? cd4 21.Rb8 Qb8-+ (21...Rb8?! 22.Ba1=; worse is 21...Nb8 22.Qc2 dc3 23.Nb1-+)) 20...Qb8 21.Qc2 (21.cd5?? cd4 22.Bd4 Rc1 23.Rc1 Ba3-+) 21...Ne4 22.Ne4 (22.cd5 cd4 23.Ne4 fe4-+) 22...fe4 23.Bh3 (better is 23.dc5 Rc5 24.cd5=) 23...cd4-/+ 24.Bd7 Rc4 25.Qb2 Qc7 26.Bd4 Qd7 27.e3 Qc6 28.Rb1 h6 29.Qb8 Rc1 30.Rc1 Qc1 31.Kg2 Qa3 32.Qa8 Qd6 33.Qa4 Kh7 34.Qe8 Kg8 35.h4 Qe7 36.Qa8 Qd6 37.Qe8 ½–½. Majul Martinez,Isolina (2080) – Chang,Suzana, Pan American op, 1998. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 Nf6 4.g3 e6)

6.b5 a6 7.ba6 ba6 8.Bg2 Qb6 (better is 8...Nbd7!?+=) 9.Bf6+= gf6 10.0-0 (better is 10.c4+=) 10...Qb2-/+ 11.Nc3 Bc2 12.Qe1 Bg6 13.Qd1 Qb7 14.d3 Nd7 15.Rb1 Qc7 16.Qa4 Be7 17.Rb2 0-0 18.Rfb1 Rfb8 19.Rb8 Rb8 20.Qa6 Rb1 21.Nb1 c4 22.Nbd2 c3 23.Nb3 Nc5?? (better is 23...c2 24.Bf1 Qb8-+) 24.Qa8-/+ Kg7 25.Nc1 Qb6 26.e4?? (better is 26.Bf1-+) 26...de4 27.de4 Qb1 (worse is 27...Ne4 28.a4-+; worse is 27...Be4 28.Qe8 Nd3 29.Nd3 Qb1 30.Nde1 Bf3 31.Bf3 Qe1 32.Kg2-+) 28.Qa7 Qc1 29.Bf1 Be4 30.Nd4 (30.h4 Bf3 31.Qb8-+) 30...Bd3 31.Kg2 (31.h4 Qf1 32.Kh2 Qf2 33.Kh3 Bf1 34.Kg4 f5 35.Kh5 Be2 36.Ne2 Qe2 37.g4 Qg4) 31...Bf1 32.Kf3 Qd1 (32...Qd1 33.Ke3 Qd3 34.Kf4 Qe4) 0–1. Fabus,Marian (1775) – Sedlar,Jozef (2025), SVK–chT2C, 2007.

6.b5 Nbd7 7.Bg2 a6 8.ba6 ba6 9.0-0 Rb8 10.Ra2 Bd6 11.d3 0-0 12.Nbd2 Nb6 13.c4 d4 14.h3 Qe7 15.Nh4 Bg6 16.Ng6 hg6 17.Nf3 Rfd8 18.Bc1 Bc7 19.Bd2 e5 20.Ng5 Nh7 (20...e4 21.Qe1=) 21.h4 Ng5 22.Bg5 f6 23.Bd2 Qd7 24.a4 Re8 25.a5 Nc8 26.Bd5 Kh8 27.e4 de3 28.Be3 Bd6 29.Qf3 Ne7 30.Bf7 Rf8 31.Bg6 Ng6 (31...Ng6 32.Qh5 Double attack (32.Qh5 Decoy)) 32.Qh5 Kg8 33.Qg6 f5 34.Bg5 f4 35.gf4 (35.Re1!?+=) 35...ef4= 36.f3 Rbe8 37.Rg2 Qe6 (37...Re6 38.Qh5=) 38.Qe4 Qe4? (better 38...Bc7!?=) 39.fe4 Be5 40.Rf3 Rf7 41.h5 Kh7 42.h6 gh6 43.Bh6 Rg8 44.Bg5 Rg6 45.Bd8 Rg2 46.Kg2 Kg6 47.Bb6 Bd4 48.Rh3 Kg5 49.Kf3 Rd7 50.Rh2 Be3 51.Rg2 (better 51.Ke2!?+-) 51...Kf6+= 52.Ke2 Rh7 53.Bd8 Kf7 54.Bc7 (54.Kf3!?+/-) 54...Kf6 55.Bd8 Kf7 56.Bg5 (56.Kf3!?+/-) 56...Ke6= 57.Rg4 (better 57.Kf3 Ke5 58.Rb2=) 57...Rh2-/+ 58.Ke1 Ke5 59.Be7?? (better 59.Kf1-+) 59...Kd4 (better 59...f3 60.Rg5 Ke6-+) 60.Kf1 (60.Bd6 Kd3 61.Rf4 Re2 62.Kf1 Bf4 63.Bf4 Re4 64.Bd6 Rc4 65.Kg2-+) 60…f3 (60...f3 61.e5 Kc3 62.Rg1 Rf2 63.Ke1 Rc2 64.Bc5 Rc1) 0-1. Valenta,V jr (2050) - Cerny,Michal (1685), 45th Vsetin Open, 2020.

6.b5 Nbd7 7.Bg2 Nb6 8.d3 Na4 9.Bf6 (9.Be5 Qa5 10.Nbd2 Nd7+=) 9...Qf6 (worse is 9...gf6 10.c4 Nb6 11.cd5 ed5 12.Nbd2+=) 10.Ra2 c4 11.Qd2 Nb6 12.0-0 Be7 13.a4 cd3 14.cd3 0-0 15.a5 Nd7 16.Nh4 Bg4 17.d4 Rfc8 18.a6 ba6 19.Ra6 Nb6 20.e4 Rc4 (20...Nc4 21.Qd3 Qg5 22.ed5 ed5 23.h3+/–) 21.h3= Bh5 22.e5 Qg5 23.Qd3 Rc7 24.Nd2 Qh6 25.Rfa1 Rac8 26.Nhf3 Rc3 27.Qe2 Bf3 (27...Bb4 28.R1a2 Rc1 29.Kh2=) 28.Nf3 (28.Bf3? Rc2 (28...Qh3?! 29.Ra7 Bb4 30.R7a6 Rc1 31.Rc1 Rc1 32.Nf1=) 29.Bh5 Rd2-+) 28...Rc2 29.Qe3 ½–½. Bendig,Frank (2090) – Razvan,Andrei (1940), IECG, 2000.

6.b5 Nbd7 7.Nh4 Bg4 +=.

6.b5 Nbd7 7.Nh4 Bg6 8.Bg2 Be7 9.Ng6 hg6 10.c4 Nb6 11.d3 Qd7 12.Nd2 0-0 13.a4 Rad8 14.Qc2 d4 15.a5 Nc8 16.a6 b6 17.0-0 e5 18.Nf3 Bd6 19.h3 Qe7 20.Ng5 Nd7 21.Bc1 f5? (better is 21...Nf6+/–) 22.Bd5+- Kh8 23.Ne6 Qf6?? (23...f4+-) 24.Bg5 (24.Bg5 Qe6 25.Be6+-) 1–0. pierre – kinrep, internet, 2011.

6.c3 Nc6 A) 7.d3 A1) 7...Be7 8.Nh4 (8.Nbd2 cb4 9.cb4 Qb6 10.Bg2 0-0 11.Qa4 Rac8 12.0-0) 8...0-0 9.Nf5 ef5 10.Bg2 Qb6 11.Nd2 cb4 12.ab4; A2) 7...Qb6 8.Nbd2 (8.Nh4 Bd6 9.Nf5 ef5 10.Bg2 0-0 11.0-0 a5 12.Nd2) 8...cb4 9.cb4 Bd6 10.Bg2 0-0 11.e4 Bg4 12.0-0; A3) 7...Bd6 8.Nbd2 (8.Bg2 a5 9.b5 Qb6 10.a4 0-0 11.Nbd2 Ne5 12.Ne5) 8...0-0 9.Bg2 Qb6 10.0-0 a5 11.bc5 Bc5 12.Rb1; B) 7.Bg2 B1) 7...Qb6 8.d3 (8.0-0 a5 9.Nh4 Be4 10.Be4 de4 11.d3 ed3 12.Qd3) 8...a5 9.Nbd2 Bd6 10.e4 Bg4 11.0-0 0-0 12.bc5; B2) 7...Bd6 8.d3 (8.0-0 c4 9.Nd4 Nd4 10.cd4 0-0 11.Nc3 Qb6 12.Na4) 8...0-0 9.0-0 Qb6 10.Nbd2 h6 11.e4 Bg4 12.Qe1; B3) 7...Be7 8.d4 (8.0-0 Qb6 9.d3 0-0 10.Nbd2 a5 11.Nh4 cb4 12.Nf5) 8...Qb6 9.Nh4 Be4 10.Be4 de4 11.Nd2 cd4 12.cd4; C) 7.d4 C1) 7...cd4 8.cd4 (8.Nd4 Be4 9.f3 Bg6 10.Nd2 Be7 11.c4 0-0 12.Kf2) 8...Bd6 9.Nc3 0-0 10.Bg2 Qb6 11.0-0 Rac8 12.Na4; C2) 7...cb4 8.cb4 Be7 9.Nc3 0-0 10.Bg2 Ne4 11.0-0 Qb6 12.Ne4; C3) 7...Qb6 8.Nh4 Bg6 9.Bg2 Bd6 10.0-0 0-0-0 11.Nf3 Kb8 12.Nbd2.

6.c3 Nbd7 A) 7.Bg2 a5 8.0-0 Bd6 9.bc5 Nc5 10.d4 Nce4 11.Nbd2 Qb6 12.Qa4; B) 7.d4 B1) 7...cd4 8.cd4 (8.Nd4 Be4 9.f3 Bg6 10.Bh3 Qb6 11.Nd2 a5 12.Qa4) 8...a5 9.b5 Bd6 10.Bg2 0-0 11.Nc3 Rc8 12.0-0; B2) 7...cb4 8.ab4 (8.cb4 a5 9.b5 Bd6 10.Bg2 0-0 11.0-0 Rc8 12.Nc3) 8...Bd6 9.Nh4 Be4 10.f3 Bg6 11.Na3 a6 12.Bg2; C) 7.d3 C1) 7...Bd6 8.Bg2 (8.Nbd2 a5 9.Bg2 ab4 10.ab4 0-0 11.bc5 Nc5 12.0-0) 8...0-0 9.Nbd2 Qb6 10.0-0 Rfe8 11.Re1 a5 12.e4; C2) 7...Be7 8.Nbd2 (8.Bg2 Qb6 9.0-0 0-0 10.Nbd2 a5 11.Nh4 ab4 12.Nf5) 8...0-0 9.Bg2 Qc7 10.0-0 h6 11.Qc2 e5 12.e4; C3) 7...a5 8.Nbd2 (8.Nh4 Bg4 9.h3 Bh5 10.g4 Bg6 11.Nd2 Bd6 12.Bg2) 8...Bd6 9.Nh4 0-0 10.Nf5 ef5 11.Bg2 ab4 12.ab4.

6.bc5 Bc5 7.d4 Bd6 8.Nbd2 Nc6 (8...Qb6 9.Rb1 Qc6 10.Rc1 Qb5 11.e4 Qb2 12.ef5 ef5 13.c4-/+) 9.Bg2 (9.c4 0-0+= 10.Bg2 Qb6 11.Ra2 Qa6 12.c5 Be7 13.Nh4=) 9...Rc8 (9...Qb6 10.Rb1+= Qa5 11.Nh4 Be4 12.f3 Bg6 13.e3+=) 10.0-0 (10.c4 0-0+= 11.Nh4 Be4 12.f3 Bg6 13.Ng6=) 10...a6 (10...Ne7!? 11.Rc1 Qb6-/+ 12.Nb3 Qc7 13.Qd2-/+) 11.Nh4 Bg4 12.h3 (12.c4 b5 (12...0-0= 13.c5=) 13.h3+=) 12...Bh5+= (12...g5 13.hg4+=) 13.c4 dc4 14.Nc4 Bb8 15.Nf3 0-0 16.Nfe5 Ne7?? (better is 16...Ne5 17.Ne5 Nd5=) 17.Bb7+- Nfd5 (17...Rc4 18.Nc4 Qc7 19.Qb3 (19.Ba6?! Qc6=) 19...Be2 20.Rfc1+-) 18.Bc8 Qc8 19.Rc1 Qb7 20.Qd2 f6 21.Nd3 Qa7 22.e4 Nc7 23.Nf4 Bf7 24.Nd6 Nb5 25.Nf7 Kf7 26.d5 ed5 27.ed5 Bf4 28.Qf4 Nd5 29.Qc4 Rd8 30.Rfd1 Nbc7 31.Bd4 Qb7 32.Rb1 Qa8 33.Rb2 Kf8? 34.Bc5 Kg8 35.Rbd2 Kh8?? 36.a4 (36.a4 Qc6 37.a5+-) 1–0. steviousmattias – Sim1, ChessWorld.net, 2010.

6.bc5 Bc5 7.e3 0-0 8.Bg2 Nc6 9.0-0 Rb8 10.d3 Bg4 11.Nbd2 e5 Black prepares d4 12.h3 Bf3 13.Qf3 d4 14.Rfe1 de3 15.fe3 Re8 16.Rf1 Qb6 17.Nc4 Qc7 18.Rab1 b5 (better is 18...Re6!?+=) 19.Qc6+- Qc6 20.Bc6 bc4 21.Be8 Be3 (21...Re8 22.d4 ed4 23.Bd4 Ba3+-) 22.Kg2 Re8 23.Rfe1 (23.dc4?! Bb6+/–) 23...Bb6 24.Be5 cd3 25.Bf6 Re1 26.Re1 (26.Re1 gf6 27.cd3+-) 1–0. pierred – starior78, Yahoo, 2005.

6.bc5 Bc5 7.e3 0-0 8.Nh4 Bg4 9.f3 Bh5 10.Ng2 Nc6 11.g4 Bg6 12.h4 h6 13.Nf4 +=.

6.bc5 Bc5 7.e3 Nbd7 8.Bg2 Qb6 (8...0-0 9.Nh4 Bg4 10.f3-/+) 9.Ra2 (9.Bd4 0-0+=) 9...0-0 10.0-0 (10.Nh4 Bg4 11.f3 Bh5+=) 10...Rac8 11.Bd4 Bd4 (11...Qd6 12.Bc5 Rc5 13.Nd4+=) 12.ed4 (12.Nd4 Be4+=) 12...Nb8 (12...Bg4 13.c3-/+) 13.a4 (13.d3 Nc6-/+) 13...Nc6-/+ 14.c3 Bd3 15.Re1 Nd7 (15...Ne4 16.h3-/+) 16.Na3+= Na5 17.Re3 Bc4 (17...Be4 18.Ne5 Ne5 19.de5 Bg2 20.Kg2+=) 18.Nc4 Rc4 (18...Nc4 19.Re2+=) 19.Bf1 Rcc8 20.Re1 Nf6 (20...Nc4 21.Ne5 Nce5 22.de5+=) 21.Bd3 Nc4 22.Qc2 (22.Ne5 Rfd8+=) 22...Nd6 (22...Qc7 23.Ne5+=) 23.Ne5 Qc7 24.a5 Qe7 25.Qd1 g6 26.Qe2 Nh5 27.a6 b6 28.Raa1 Ng7 29.Qd1 f6 30.Ng4 Ngf5 31.Ne3 Ne3 32.Re3 Nc4 33.Bc4 Rc4 34.Qf3 Rd8 35.Rae1 Rc6 36.Qg4 Now all is on e6 36...Rdd6 37.h4 b5 38.h5 Kg7 39.hg6 hg6 40.Rb1 Rb6 41.Kg2 Rd8 42.Ree1 Rh8 43.Rh1 Rh1 44.Rh1 Rb8 45.Qh4+- Do you see the mate threat? 45...Rg8 46.Qh7 Kf8 47.Qe7 Ke7 48.Rh7 Kd6 49.Ra7 Rb8 50.Rf7 Ra8 51.a7 f5 52.Kf3 g5 53.Ke3 Kc6 54.Ke2 Kb6 55.Re7 Ra7 56.Re6+- Kc7 57.Re7 Kb6 58.Ra7 Ka7+/– 59.Kd1 Kb6 60.Kc2 Kc6 61.Kb3 Kc7 62.Kb4+- Kb6 63.f3 Kc6 64.Ka5 (64.Ka5 f4 65.g4+-) 1–0. Diepeveen,Vincent (2300) – Burer,Audry, Haarlem AKN, 1994.

7.b5 A) 7...Bd6 8.Bg2 (8.Nh4 Bg4 9.c4 0-0 10.f3 Bh5 11.cd5 ed5 12.Nf5) 8...Qb6 9.c4 Nbd7 10.Nc3 0-0 11.0-0 a4 12.Nh4; B) 7...Nbd7 8.Bg2 (8.Nh4 Bg4 9.h3 Bh5 10.g4 Bg6 11.d3 Bd6 12.Nd2) 8...Bd6 9.0-0 0-0 10.d3 Qc7 11.Nbd2 h6 12.Re1.

7.bc5 Bc5 8.d4 (8.Qb3 Ra6 9.d4 Rb6 10.Qa2 Be7 11.c4 0-0 12.Bg2) 8...Bd6 (8...Qb6 9.Ra2 Be7 10.c4 dc4 11.Nbd2 Qc6 12.Qc1) 9.Nbd2 (9.c4 Nc6 10.c5 Bc7 11.Nc3 0-0 12.Bg2) 9...Qb6 (9...Nc6 10.c4 0-0 11.c5 Be7 12.Nh4) 10.Qb3 (10.Ra2 Qc6+= (10...Nc6 11.c4 Qc7 12.Nh4) 11.Bg2 Nbd7 12.0-0) 10...Qb3-/+ 11.Nb3 Nbd7 (11...Nc6 12.e3+=) 12.Bg2 (12.e3 a4 13.Nbd2 0-0+=) 12...Ke7 (12...Nb6 13.Nbd2-/+) 13.Nh4 (13.Nbd2 b5+=) 13...Bc2 (13...Be4 14.Be4 Ne4 15.f3+=) 14.Nd2+= b5 15.Rc1 Bf5 (15...Ba4 16.h3+=) 16.Nf5= ef5 17.f3 (17.e3 Nb6=) 17...Rhe8+= 18.e4 (18.Kf2 Rac8+=) 18...fe4-/+ 19.fe4 Ne4 20.Ne4 de4 21.0-0 Nf6 22.Rf5 Rab8 23.Re1 Kf8-/+ 24.Re2 Re6 25.a4+= ba4 26.Ra5 a3 27.Ba3= Rb1 28.Bf1 Ba3 29.Ra3 Ng4 30.h3 Nh6 31.Ra8 Ke7 32.g4 Rf6 33.Ra7 Kd8 34.Ra8 Kc7 35.Rf2 Rc6 36.Re8 Re1 37.c4 Kd7 38.Re5 Rc4 39.Re4 Re4= 40.Bc4 f6 41.Rd2+= Re3 42.Kg2 Rc3 43.Be2 Nf7 44.h4 Nd6 45.Bf3 Nb5 46.h5 h6 47.Be2 Nc7 48.Bf3 Ne6 49.Be4 Kd6= 50.Kf2 Ng5 51.Bb7 Nh3 52.Kg2 Nf4 53.Kf2 Rh3 54.Rd1 f5 55.Bc8 fg4= 56.Bg4 Rb3 57.Bf3 Nh3 58.Ke2 Ng5 59.Ba8 Rh3 60.Rh1 Ra3 61.Bb7 Ne6 62.Rh4 Rb3 63.Ba8 Rb5 64.Kd3 Rh5+= 65.Re4? Ra5-+ 66.Bb7 Ra3 67.Kc4? Ra7 68.d5 Ra4 69.Kd3 Nc5 (69...Nc5 70.Ke3 Re4 (70...Nb7?! 71.Ra4 Kd5 72.Kf4+=) 71.Kf3 Re5-+) 0–1. Gilardone,Adriano (2145) – Salvador,Roland (2395), Open Salsomaggiore ITA, 2006.

7.e3 A) 7...ab4 8.cb4 cb4 9.Nd4 Be4 10.f3 Bg6 11.ab4 Ra1 12.Ba1; B) 7...h6 8.Bb5 (8.Ne5 Nbd7 9.Bb5 Bd6 10.Nd7 Nd7 11.bc5 Bc5 12.Qa4) 8...Nc6 9.0-0 Bh3 10.Re1 ab4 11.cb4 Bg4 12.bc5; C) 7...Nbd7 8.Bb5 c4 9.d4 Bd6 10.Nbd2 Qb6 11.Ba4 0-0 12.0-0.

7.Bg2 A) 7...ab4 8.cb4 (8.ab4 Ra1 9.Ba1 Nc6 10.b5 Na5 11.d3 Bd6 12.Nbd2) 8...Nc6 9.b5 Na5 10.d3 Bd6 11.Nh4 Bg4 12.h3; B) 7...Nbd7 8.0-0 (8.d3 ab4 9.ab4 Ra1 10.Ba1 cb4 11.Nbd2 Qc7 12.Qc1) 8...Bd6 9.bc5 Nc5 10.d4 Nce4 11.Nbd2 Qb6 12.Qa4.

7.Nh4 A) 7...Be4 8.f3 Bg6 9.bc5 Bc5 10.Ng6 hg6 11.c4 Nbd7 12.cd5; B) 7...Bg6 8.b5 (8.bc5 Bc5 9.Qb3 Ra6 10.Ng6 hg6 11.d4 Rb6 12.Qc2) 8...c4 9.d3 cd3 10.ed3 Nbd7 11.Ng6 hg6 12.c4; C) 7...Bg4 8.h3 (8.f3 Bh5 9.bc5 Bc5 10.d4 Bb6 11.Nd2 Nc6 12.Bg2) 8...Bh5 9.g4 Bg6 10.Ng6 hg6 11.bc5 Bc5 12.d4.

6.Bg2 Bd6 7.0-0 0-0 8.d3 c5 9.c3 Qb6 10.Ra2 a5 (10...Qa6!?+=) 11.bc5= Bc5 12.h3 (12.Nbd2 Rfc8=) 12...a4 13.Nbd2 e5 14.g4 Be6 15.Ng5 Ra7 (15...h6 16.Ne6 Qe6 17.c4+=) 16.Ne6= Qe6 17.c4 dc4 18.dc4 (18.Nc4?? b5 19.Qc2 Rc7-+) 18...b5 19.g5 (19.Qc2 Rc8+=) 19...Ne8 (19...bc4 20.Qc2 Nd5 21.Qc4+= (21.Nc4? Nf4-+)) 20.Qc2 (20.Ne4!? bc4 21.Qd2=) 20...Nd6-/+ 21.Rc1 (21.e3 Rc7 22.Raa1 Nc4 23.Nc4 Be7-/+) 21...bc4 22.Bc3 (better is 22.e3-/+) 22...Qg6 (better is 22...f5 23.Rb1 e4-/+) 23.Qg6= fg6 24.e3 Rf5 (24...Rc8 25.Bd5 Kf8 26.Be6= (worse is 26.Nc4 Nc4 27.Bc4 Ba3 28.Ra3 Rc4-/+)) 25.h4+= Nb6 26.Bh3 Rf8 (26...e4 27.Bf5 gf5 28.Be5+/–) 27.Be5 Nf5 (27...Re8 28.Bf4+/–) 28.Bf5 (28.Nc4!? Nc4 29.Rc4+-) 28...Rf5+= 29.Bf4 (29.Bb8 Ra8 30.Bg3 Rc8=) 29...Nd5 (29...Bf8 30.Rcc2+= (worse is 30.Nc4 Rc5 31.Rac2 Rc4 32.Rc4 Nc4 33.Rc4 Ba3+=)) 30.Bb8 (30.Bg3 c3 31.Ne4 Be7+=) 30...Rb7+= 31.Bg3 Ne3? (better is 31...c3!? 32.Ne4 Rb2+=) 32.fe3+/– Be3 33.Kg2 Rd7 34.Rcc2+- Rd3 35.Nc4 35...Bf4 36.Bf2 h6 37.gh6 gh6 38.Nb6 g5 39.h5 g4 40.Rc5 Rc5 41.Bc5 Rh3 42.Bg1 Rh5 43.Na4 Rh3 44.Nc5 Rg3 45.Kf1 Rc3 46.Ne4 Rc1 47.Kg2 Kg7 48.Bf2 Rc4 49.Ng3 Kg6 50.Ne2 Be5 51.a4 Rc6 52.Nd4 Ra6 53.Nb3 Bc7 54.Rc2 Bd8 55.Rc8 Be7 56.Rc4 h5 57.Nc5 Ra8 58.Nb7 Kf5 59.a5 h4 60.Rc7 Bb4?? 61.Bh4 Ba5 62.Rc5 Ke4 63.Na5 Rh8 64.Rc4 Kf5 65.Kg3 Rg8 66.Rc5 Ke4 67.Bg5 Kd4 68.Rb5 Rc8 69.Kg4 Kd3 70.Re5 Kd4 71.Bf6 Rg8 72.Rg5 (72.Rg5 Kd3 73.Rg8 Ke2 74.Rd8 Ke3 75.Nc4 Kf2 76.Rd2 Kf1 77.Bd4 Ke1 78.Kf3 Kf1 79.Rd1#) 1–0. Valenta,Vit (2175) – Smid,Jan (1975), FIDE OPEN Stare Mesto, 2010.

6.Bg2 Bd6 7.0-0 c5 8.bc5 Bc5 9.Bd4 +=.

6.Bg2 Bd6 7.0-0 c6 8.d3 Qe7 (8...a5 9.b5+=) 9.Nbd2 (9.c4 e5=) 9...e5 (9...0-0 10.c4+=) 10.Re1 (10.e4 Bg6=) 10...Nb6 (10...0-0 11.e4 de4 12.de4=) 11.c4 (11.e4 de4 12.de4 Bg4=) 11...Bc7 (11...dc4 12.dc4 Bc7 13.e4+=) 12.cd5 cd5 (12...Nbd5? 13.e4 Nb4 14.ab4+- (14.ef5?! Nd3 15.Re2 Nb2+/–)) 13.e4 de4 14.de4 (14.Ne4 Ne4 15.de4 Bg4=) 14...Bd7 15.Rc1 Ba4 (15...Rc8 16.Nh4=) 16.Qe2+= 0-0 17.Bh3 (17.Nh4 Rfc8+=) 17...Rfd8 18.Nh4 g6 19.Ndf3 (19.Qe3 Bd6+=) 19...Bd6= 20.Qe3 Bc6 (20...Nfd7 21.Qd2=) 21.Qh6 (21.Qg5!? h6 22.Qh6 Be4 23.Qg5+/–) 21...Be4 (21...a5 22.Qg5 h6 23.Qh6 ab4 24.ab4+=) 22.Ng5 (22.Qg5 Nbd5=) 22...Bc6 (22...Bd5!? 23.Nhf3 Bf3 24.Nf3 Nfd7+=) 23.f4+= Qc7?? (better is 23...Qf8!? 24.Qf8 Bf8+=) 24.Nf5! (24.fe5 Bf8 25.Nf5 Bh6 26.Nh6 Kg7 27.Nhf7 Nfd5 28.Nd8 Qe7 29.Nge6 Kg8 30.Nc6 bc6 31.Rc6 Re8+-) 24...Bf8? (24...gf5 25.Qf6 Pinning (25.Qf6 Deflection)) 25.Be5 Qd7 (25...Qe5 26.fe5 Bh6 27.Nh6 Kg7 28.ef6 Kf6 29.Nhf7 Rd2+-) 26.Bf6 Bh6 (26...Bc5 27.Rc5 Qd4 28.Bd4 Rd4 29.Qg7) 27.Nh6 Kf8 28.Nh7 1–0. Hayden – Winser, Hastings, 1948. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Bf5 4.g3 e6 5.a3 Nbd7)

6.Bg2 c5 7.bc5 Bc5 8.0-0 0-0 9.d3 (9.Nc3 Qa5=+) 9...Qb6 10.Qc1 (10.Ra2 Rfe8=+) 10...e5 (10...Ng4!? 11.d4 Be7=+) 11.Nc3= e4 (11...Bd6 12.a4=) 12.Na4 Qc6 (12...ef3 13.Nb6 fg2 14.Na8 gf1Q 15.Kf1 Bh3 16.Ke1 Ra8 17.Qf4=) 13.Nc5+= Qc5 (13...Nc5 14.Nd4 Qd7 15.f3=) 14.Nd4 (14.Bd4 Qc7 15.Nh4 Be6+=) 14...Bg6 15.a4 (15.Rb1+=) 15...Rae8 (15...Rfe8!?+=) 16.Qd2 (16.Nb3 Qc7 17.Ba3 h5+-) 16...Rc8 (16...h6 17.de4 Re4 18.Nb3+-) 17.Rac1 (17.de4 Rfd8 18.ed5 Nb6+-) 17...Ne5 (17...Rfe8 18.Nb5+=) 18.Nb5 d4? (better 18...a6 19.Be5 ab5 20.ab5 Ng4+-) 19.Bd4+- Qd5 20.c4 Qd7?? (20...Qe6 21.Na7 Ra8 22.Rfe1+-) 21.Qb2 (better 21.Be5 ed3 22.ed3 Qd3 23.Qf4+-) 21...Nc6 (21...a6 22.Be5 ab5 23.cb5+-) 22.Bf6 gf6 23.de4 Qe6 (23...Qe7 24.c5+-) 24.Rfd1 Rfd8 (24...Na5 25.c5 Qb3 26.Qf6 Rc5 27.Nd6+-) 25.Nd4 (better 25.Rd5!? Qe7+-) 25...Nd4 26.Rd4 Rd4 27.Qd4 b6 (27...Qe7 28.Rd1+-) 28.f4 Bh5 (28...Qe7 29.f5 Rd8 30.Qb2+-) 29.Kf2 1–0. Shamieh,Jamal (2070) – Kabalan,Farah, 6th Beirut International Open, 2013.

6.Bg2 h6 7.0-0 Bd6 8.d3 0-0 9.Nbd2 Qe7 10.Nd4 Bh7 11.Nb5 e5 12.Nd6 Qd6 13.e4 c6 (13...de4 14.Ne4 Be4 15.de4=) 14.Qe2 (14.f4 de4 15.Nc4 Qe6 16.fe5 Ne8+=) 14...Rfe8= 15.c4 de4 16.de4 c5 17.b5 Nf8 18.f4 Rad8 19.Rad1 Qd3 (19...ef4 20.Rf4 Ng6 21.Rff1+=) 20.Qd3 Rd3 21.f5 (21.Bf3 Red8 22.fe5 Ne4 23.Ne4 Be4 24.Rd3 Bd3=) 21...Red8= 22.Bc1 Ng4 23.Rf3 Ne3 24.Re1 Nc2 25.Re2 Nd4-/+ 26.Rd3 Ne2 27.Kf2 Rd3 28.Ke2 Rd8 29.a4 b6 30.Bb2 Nd7 31.Bc3 Kf8 32.a5 h5 33.h3 g6 34.g4 hg4 35.hg4 gf5 36.ef5 f6 37.Ke3 Bg8 38.Bf1 Bf7 39.Ne4 Ke7 40.a6 Rh8 41.g5 fg5 42.Ng5 Rh1 43.Bd3 Bg8 44.Ke4? Rh4-+ 45.Ke3 Bc4 46.f6 Nf6 47.Be5 Ng4 48.Kf4 Ne5 49.Ke5 Bd3 50.Kd5 Bb5 0–1. Boysan,Ferit – Michel Yunis,Christian D (2335), internet Section, 2004.

6.Bg2 h6 7.0-0 Be7 8.d3 0-0 9.Nbd2 c5 (9...a5 A) 10.b5 A1) 10...c6 11.c4 (11.bc6 bc6 12.Nd4 Qc7 13.Nf5 ef5; 11.Nd4 cb5 12.Nb5 Nc5 13.c4 Qd7) 11...Nc5 12.Nd4 Qd6 13.cd5 cd5; A2) 10...Nc5 11.Nb3 (11.c4 c6 12.Nd4 cb5 13.cd5 Qd7; 11.Ne5 Qd6 12.Ndf3 Nfd7 13.Qd2 Rfe8) 11...Na4 12.Be5 Ng4 13.Nbd4 Ne5; B) 10.Qb1 c6 (10...ab4 11.ab4 c6 12.Bc3 Qb6 13.Qb3 Ng4; 10...Re8 11.Bc3 e5 12.Ne5 Ne5 13.Be5 Ng4; 10...c5 11.bc5 Nc5 12.c4 Ra6 13.Qc2 Qd7) 11.Bc3 ab4 12.ab4 Qb6 13.Qb2 Bd6) 10.b5 (10.bc5 Bc5 (10...Nc5 11.Ne5 Qa5 12.c4 Rac8 13.Ndf3 Bd6) 11.c4 (11.Nb3 Bd6 12.Nbd4 Bg6 13.Qd2 a6) 11...Rc8= 12.Rb1 Nb6 13.Ne5 Qe7; 10.Rb1 Qc7 (10...Rc8 11.bc5 Nc5 12.Nd4 Bg4 13.N4f3 Qc7) 11.bc5 Nc5 12.Nd4 Bg6 13.c4 Rfc8; 10.c4 cb4 11.ab4 Bb4 12.Nd4 Bg4 13.cd5 ed5) 10...a6=+ (10...Qc7 11.c4 (11.Qe1 a6 12.e4 Bh7 13.ba6 Ra6; 11.Re1 d4 12.Nc4 Nb6 13.Nfe5 Na4) 11...d4 12.Qc2 Ng4 13.h3 Nge5) 11.ba6 (11.a4 Qc7 12.c4 Bd6 13.Qc2 Ne5) 11...Ra6 12.Ne5 (12.c4 Qb6 (12...Qc7 13.Qc2 d4) 13.Rb1 (13.Qc2 Bd6) 13...Qc7=+ (13...Qd6=)) 12...b5 (12...Rb6 13.Qc1 Ne5) 13.e4 Bh7 (13...Ne5 14.Be5 Bg6 15.Qb1=+) 14.ed5 ed5 15.Ndf3 (15.Re1 Re8=+) 15...Qc7 (15...d4 16.c3 dc3 17.Bc3=+) 16.Re1 Rfa8 (16...Re8 17.c4 bc4 18.dc4=+) 17.Qe2 (better 17.Nd7 Qd7 18.c4=) 17...Re6 (17...Re8 18.Qd2=+) 18.Qd2 (better 18.Bh3 Ne5 19.Be5 Re5 20.Ne5+-) 18...Ne5 19.Ne5 Bd6 (19...Re8 20.a4 ba4 21.Ra4=+) 20.f4 (20.Nf3 Qe7=) 20...Rae8 (20...Ra6 21.Re2=+) 21.c4 (21.a4!? ba4 22.Ra4=+) 21...bc4-/+ (worse 21...Be5 22.fe5 Nd7 23.cd5+-) 22.dc4 d4 (22...Be5 A) 23.fe5?! Ne4 24.Qf4 g5+-; B) worse 23.Re5 B1) worse 23...Re5 24.Be5 (24.fe5 Ne4 25.Qd5 Rd8 26.Be4 Rd5 27.Bd5 Qb6-/+) 24...Qb6 25.cd5+-; B2) 23...dc4?! 24.Rae1=; B3) 23...d4=+; C) 23.Be5 Qd8 24.cd5+-) 23.Nd3 (23.Bc6 Rc8-/+) 23...Bd3 (23...Qd7 24.a4-/+) 24.Re6=+ Re6 25.Qd3 Qe7 26.Kf1? (26.Rf1 Re3 27.Qf5 Nd7=+) 26...Bc7 (26...Ng4!? 27.Bd5 Nh2 28.Kg1-+) 27.Qd2 (better 27.Qf3=+) 27...Ng4-+ 28.Bf3 Ne3 29.Kf2 (29.Kg1 Nc4 30.Qf2 Ba5-+ (30...Nb2?! 31.Qb2 c4 32.Kg2-+)) 29...Nc4 30.Qc2 Nb2 (30...Ne3 31.Qd2-+) 31.Qb2 Rb6 (31...c4 32.Kg2 Qc5 33.a4-+) 32.Qd2-/+ Qd8 (32...Rb3 33.Kg2-/+) 33.Be2 (33.Rc1 Bd6-/+) 33...Rb3 (33...Qf6 34.Rc1 Bd6 35.Kg2-/+) 34.Bc4-/+ Ba5 (34...Re3 35.Qc2-+) 35.Qa2 Re3 (better 35...Rb7!?-/+) 36.Bf7=+ Kf8 (36...Kh8 37.Qd5=+) 37.Bh5 (37.Bg6 Qe7 38.Rb1 Bc7=) 37...Re7 38.Qc4 (38.Qc2 d3 39.Qc4 Qd6=+) 38...Qb6 39.Rc1 (39.Ra2 g6 40.Bf3 Re3=+) 39...Qb2 (39...g6!? 40.Be2 Qb2=+) 40.Rc2= Qa3 41.Qc5 Qc5 42.Rc5 Ra7 43.Rf5 Kg8 44.Bf7 ½–½. Udaykumar,Arunn Mark (1790) – Noever,Niklas (1625), German Championship Youth U25, 2017.

6.Nc3 a5 A) 7.Nd4 Bg6 (7...Nc6 8.Nf5 ef5 9.Bh3 ab4 10.ab4 Bb4 11.Ra8 Qa8 12.Bf5 Qa5) 8.b5 Bd6 9.Bg2 0-0 10.0-0 e5 11.Nf3 d4 12.Na4 c6; B) 7.b5 Bc5 (7...Nbd7 8.Nd4 Bg6 9.Bg2 Bc5 10.Na4 Bd6 11.0-0 0-0 12.d3 Qe7; 7...Bd6 8.e3 Nbd7 9.Nd4 Bh7 10.Bh3 0-0 11.0-0 Bg6 12.d3 Nc5) 8.d4 Bd6 9.Nh4 Bh7 10.Bg2 Nbd7 11.Nf3 0-0 12.0-0 Qe7; C) 7.Bg2 Nbd7 (7...ab4 8.ab4 Ra1 9.Qa1 Bb4 10.Qa4 Nc6 11.Nd4 Bc3 12.Bc3 0-0) 8.ba5 Be7 9.0-0 0-0 10.Nb5 Be4 11.d3 Ra5 12.Nbd4 Bf3.

6.Nc3 a6 A) 7.Bg2 Nc6 (7...Be7 8.Nd4 Nc6 9.Nf5 ef5 10.0-0 0-0 11.d4 Qd7 12.e3 Ne4) 8.0-0 Bd6 9.Nh4 Bh7 10.d3 0-0 11.e4 d4 12.Ne2 e5; B) 7.e3 Nc6 8.Bd3 Be7 9.0-0 0-0 10.Bf5 ef5 11.Qe2 Qd7 12.Qd3 Rfd8; C) 7.d3 Nc6 (7...d4 8.Na4 Nc6 9.Bg2 Be7 10.0-0 0-0 11.Nc5 Bc5 12.bc5 e5; 7...Be7 8.Nd4 Nc6 9.Nf5 ef5 10.Bg2 0-0 11.d4 Qd7 12.Qd3 Qe6; 7...a5 8.b5 Nbd7 9.Nd4 Bg6 10.Bg2 Be7 11.0-0 0-0 12.e4 Bc5; 7...Qd6 8.Bg2 Nc6 9.Nh4 Be7 10.Nf5 ef5 11.0-0 0-0 12.d4 Ne4) 8.Nh4 d4 9.Na4 Be7 10.Nf5 ef5 11.Bg2 0-0 12.c3 dc3; D) 7.Nh4 Bh7 (7...d4 8.Na4 Be4 9.f3 Bc6 10.c3 dc3 11.Bc3 Nbd7 12.Nb2 Nd5) 8.Na4 Nc6 9.Bg2 Bd6 10.0-0 0-0 11.Nc5 Bc5 12.bc5 Qe7; E) 7.Nd4 Nc6 (7...Qd7 8.Nf5 ef5 9.d4 Be7 10.Bh3 Nc6 11.Qd3 g6 12.0-0 Kf8; 7...Bg6 8.Bg2 Nc6 9.Nc6 bc6 10.0-0 Bd6 11.Na4 0-0 12.d3 a5; 7...g6 8.Bg2 Nc6 9.Nc6 bc6 10.e4 Be4 11.Ne4 de4 12.Be4 Ne4; 7...Be7 8.Nf5 ef5 9.Bh3 Nc6 10.0-0 d4 11.Na4 0-0 12.Bf5 b5) 8.Nf5 ef5 9.e3 Qd7 10.Bh3 Ne5 11.0-0 Nc4 12.Bc1 0-0-0.

6.Nc3 c5 A) 7.Nh4 Bh7 (7...d4 8.Na4 cb4 9.ab4 Bb4 10.Nf5 ef5 11.c3 dc3 12.dc3 Qd1; 7...Nc6 8.b5 Nd4 9.Nf5 Nf5 10.Bg2 Qb6 11.a4 Be7 12.0-0 0-0) 8.b5 Nbd7 9.Bg2 Bd6 10.0-0 Qa5 11.e3 Ne5 12.d3 0-0; B) 7.bc5 Bc5 8.Na4 Bd6 9.Nd4 Bg6 10.Bg2 0-0 11.Nb5 Be7 12.0-0 Nc6; C) 7.e3 cb4 (7...Nbd7 8.Nh4 Bh7 9.bc5 Bc5 10.Bg2 0-0 11.0-0 Rc8 12.Nf3 Qa5; 7...Be7 8.Bg2 0-0 9.0-0 cb4 10.ab4 Bb4 11.Nd4 Nc6 12.Nf5 ef5; 7...Nc6 8.b5 Na5 9.Bd3 Bd3 10.cd3 Bd6 11.0-0 0-0 12.Qc2 c4) 8.ab4 Bb4 9.Nd4 0-0 10.Bb5 Bh3 11.Bf1 Bf1 12.Kf1 Nbd7.

6.Nc3 Nc6 A) 7.b5 Na5 8.d3 Bc5 9.Na4 Bd6 10.Qd2 c5 11.Nh4 Bh7 12.Bc3 b6; B) 7.e3 Bd6 (7...Be7 8.Bg2 0-0 9.0-0 a6 10.Nh4 Bh7 11.d3 Qd7 12.Qd2 e5; 7...a6 8.Bd3 Bd6 9.Bf5 ef5 10.Qe2 Qd7 11.Na4 Qe6 12.Bf6 Qf6) 8.Bd3 0-0 9.0-0 Qd7 10.Bf5 ef5 11.Nb5 Be7 12.Qe2 a6; C) 7.d3 d4 (7...Bd6 8.Nb5 0-0 9.Bg2 Be7 10.Nfd4 Nd4 11.Nd4 a5 12.ba5 Ra5) 8.Nb5 e5 9.Bg2 Bg4 10.c3 a6 11.Ne5 Ne5 12.Nd4 c5; D) 7.Bg2 Bd6 (7...Be7 8.b5 Na5 9.d3 a6 10.0-0 0-0 11.Qd2 ab5 12.Nb5 Qd7; 7...a6 8.Nh4 Bh7 9.0-0 Be7 10.Na4 0-0 11.d3 Qd6 12.Qd2 b6) 8.Nb5 0-0 9.Nd6 cd6 10.0-0 e5 11.d4 e4 12.Nh4 Bd7.

6.Nc3 Bd6 A) 7.Nb5 0-0 (7...Nc6 8.Nh4 Be4 9.f3 Bh7 10.Bh3 0-0 11.0-0 a5 12.Nd6 cd6) 8.Nd6 cd6 9.Bg2 Nc6 10.b5 Na5 11.d3 e5 12.Qd2 a6; B) 7.Bg2 Nc6 (7...0-0 8.Nd4 c6 9.Nf5 ef5 10.d4 Nbd7 11.Qd3 Nb6 12.Qf5 Nc4; 7...c6 8.0-0 0-0 9.d3 Nbd7 10.e4 Bg4 11.Qd2 a5 12.Nd4 e5) 8.Nh4 Bh7 9.Nb5 Be7 10.d3 a5 11.0-0 ab4 12.ab4 Ra1; C) 7.Nh4 Bh7 (7...0-0 8.Bg2 Bh7 9.Nb5 Be7 10.0-0 Qd7 11.Nd4 Nc6 12.d3 a5; 7...Be4 8.Ne4 de4 9.d3 g5 10.Ng2 Nc6 11.Ne3 Be5 12.Be5 Ne5) 8.Nb5 Nc6 9.Nd6 Qd6 10.Bg2 0-0 11.Bf6 gf6 12.0-0 a5; D) 7.b5 Nbd7 (7...0-0 8.Bg2 Nbd7 9.0-0 Nc5 10.Nd4 Bg6 11.d3 Qd7 12.Qd2 e5; 7...e5 8.Nh4 Be6 9.Bg2 0-0 10.0-0 Nbd7 11.d3 Qe7 12.a4 g5; 7...c5 8.Nh4 Bh7 9.Bg2 0-0 10.0-0 Nbd7 11.d3 Ne5 12.Na4 Qc7; 7...Bg6 8.Nh4 Bh5 9.Bg2 0-0 10.0-0 Nbd7 11.Nf3 a6 12.d3 Nc5; 7...Bh7 8.Bg2 Nbd7 9.0-0 0-0 10.d3 Nc5 11.a4 Qe7 12.Qd2 Rfe8; 7...Bg4 8.Bg2 Nbd7 9.0-0 0-0 10.a4 Qe7 11.d4 Bb4 12.Qd2 a6; 7...c6 8.Nd4 Bg6 9.Bg2 c5 10.Nf3 0-0 11.0-0 d4 12.Na4 Qa5) 8.Bg2 0-0 9.Nd4 Bg6 10.0-0 Nb6 11.d3 e5 12.Nb3 Qd7; E) 7.Nd4 0-0 (7...Bg6 8.Bh3 Nc6 9.Ncb5 Nd4 10.Bd4 e5 11.Bb2 0-0 12.0-0 Re8; 7...Bh7 8.Ncb5 e5 9.Nf3 Nc6 10.Bh3 0-0 11.0-0 Be4 12.e3 a6) 8.Bg2 c6 9.Nf5 ef5 10.d4 Re8 11.Qd3 f4 12.0-0 Nbd7.

6.Nc3 Nbd7 A) 7.Bg2 a5 (7...c6 8.Nd4 Bd6 9.0-0 0-0 10.Nf5 ef5 11.Bh3 f4 12.gf4 Bf4; 7...Be7 8.d3 0-0 9.0-0 a5 10.b5 Nc5 11.Qd2 Qd6 12.Nd4 Bg6; 7...Nb6 8.Nd4 Nc4 9.Bc1 Ne4 10.Nf5 ef5 11.0-0 a5 12.Ne4 de4; 7...Bd6 8.Nb5 0-0 9.0-0 e5 10.d3 Qe7 11.c4 c6 12.Nd6 Qd6) 8.ba5 Be7 9.0-0 0-0 10.Nb5 Be4 11.d3 Ra5 12.Nbd4 Bf3; B) 7.e3 a5 (7...Bd6 8.Nd4 Bg6 9.Ncb5 Be7 10.Bh3 0-0 11.0-0 a5 12.Be6 c6; 7...c5 8.Bg2 cb4 9.ab4 Bb4 10.Nd4 Bg6 11.0-0 0-0 12.f4 Nc5; 7...Be7 8.Bd3 Bh3 9.Bf1 Bf1 10.Kf1 a5 11.Kg2 0-0 12.Qe2 c6) 8.Nd4 Bg6 9.ba5 c5 10.Nde2 Bh5 11.Bg2 Qa5 12.0-0 d4; C) 7.Nh4 Bh7 (7...Be4 8.Ne4 de4 9.f3 g5 10.Ng2 c5 11.fe4 cb4 12.ab4 Bb4) 8.Bg2 a5 9.b5 Bd6 10.Nf3 0-0 11.0-0 Qe7 12.d3 Nc5; D) 7.Nd4 Bg6 (7...Bh7 8.Bg2 Be7 9.0-0 0-0 10.f4 e5 11.fe5 Ne5 12.Rf6 Bf6) 8.Bh3 a5 9.Be6 fe6 10.Ne6 Qc8 11.0-0 Kf7 12.Nf4 c6.

6.Nc3 Be7 A) 7.Bg2 Nc6 (7...0-0 8.0-0 Nbd7 9.d3 a5 10.b5 Nc5 11.Qd2 Qd6 12.Nd4 Bg6; 7...Nbd7 8.Nd4 Bg6 9.f4 0-0 10.0-0 e5 11.fe5 Ne5 12.d3 c6; 7...a6 8.Nh4 Bh7 9.0-0 0-0 10.Nf3 Nc6 11.d3 d4 12.Na4 Qd6) 8.b5 Na5 9.d3 0-0 10.0-0 a6 11.Qd2 ab5 12.Nb5 Qd7; B) 7.Nd4 Bg6 (7...0-0 8.Nf5 ef5 9.Bg2 Qd7 10.e3 Nc6 11.0-0 a6 12.d4 Ne4; 7...Nc6 8.Nf5 ef5 9.Bg2 0-0 10.0-0 Qd7 11.d4 a6 12.e3 Ne4; 7...Bh7 8.Bh3 Nc6 9.Nc6 bc6 10.Na4 a5 11.Nc5 0-0 12.0-0 Bc5; 7...a5 8.Nf5 ef5 9.Bg2 Na6 10.b5 Nc5 11.e3 Qd7 12.Qf3 Rd8; 7...Qd7 8.b5 0-0 9.Bg2 a6 10.a4 Bc5 11.Nf5 ef5 12.d4 Bb4) 8.e3 Nbd7 9.Bd3 Bd3 10.cd3 Ne5 11.Qe2 0-0 12.0-0 Qd7; C) 7.b5 a6 (7...Qd6 8.Nd4 0-0 9.Nf5 ef5 10.e3 Nbd7 11.Qf3 Qe6 12.Ne2 Ne5; 7...0-0 8.Bg2 a6 9.Nd4 ab5 10.0-0 Nc6 11.Nf5 ef5 12.Nb5 Qd7; 7...Nbd7 8.Bg2 0-0 9.0-0 Nc5 10.d4 Nce4 11.Ne5 Bd6 12.f3 Nc3; 7...d4 8.Na4 Be4 9.c3 a6 10.cd4 ab5 11.Nc3 Bf3 12.ef3 0-0) 8.Nd4 0-0 9.Nf5 ef5 10.e3 ab5 11.Bb5 Nc6 12.0-0 Qd7; D) 7.e3 Nc6 (7...0-0 8.Nd4 a5 9.Nf5 ef5 10.Bd3 g6 11.0-0 Nc6 12.b5 Ne5; 7...Nbd7 8.Nd4 Bg6 9.Bd3 Bd3 10.cd3 Ne5 11.Qe2 0-0 12.0-0 Qd7) 8.Bg2 0-0 9.0-0 Qd6 10.b5 Na5 11.d3 c5 12.Qd2 a6; E) 7.d3 0-0 (7...c5 8.e4 de4 9.de4 Ne4 10.Qd8 Bd8 11.Bd3 Nc3 12.Bc3 Bd3; 7...a5 8.Nd4 0-0 9.Bg2 ab4 10.ab4 Ra1 11.Qa1 Nc6 12.Nf5 ef5; 7...Qd6 8.Bg2 Nc6 9.0-0 0-0 10.b5 Na5 11.Qd2 a6 12.Nd4 Bg4; 7...Nc6 8.b5 Na5 9.Bg2 0-0 10.0-0 a6 11.Qd2 ab5 12.Nb5 Qd7; 7...Nbd7 8.e4 Bg4 9.Be2 Bh3 10.Bf1 Bg4 11.Be2 Bh3 12.Bf1 Bg4; 7...Bg4 8.Bg2 Nc6 9.Qd2 a5 10.b5 Bf3 11.Bf3 Nd4 12.Bg2 0-0; 7...a6 8.Nd4 0-0 9.Bg2 Bg6 10.Na4 Qd6 11.c4 Nc6 12.0-0 Nd4) 8.Bg2 c5 9.0-0 cb4 10.ab4 Bb4 11.Nd4 Nc6 12.Nf5 ef5; F) 7.Nb5 Nc6 (7...0-0 8.Bg2 Nc6 9.0-0 a5 10.Nfd4 Qd7 11.Nc6 bc6 12.Nd4 Be4) 8.Bg2 0-0 9.0-0 Qd7 10.Nbd4 Nd4 11.Nd4 a5 12.ba5 Be4; G) 7.Na4 Nbd7 (7...0-0 8.Bg2 Nc6 9.0-0 Qd6 10.Nc5 b6 11.Nb7 Qd7 12.b5 Nd8; 7...Nc6 8.Bg2 0-0 9.0-0 a6 10.Nh4 Bg4 11.Nc5 Nd7 12.Nd7 Qd7; 7...Qd7 8.Nc5 Bc5 9.bc5 Nc6 10.Rb1 d4 11.e3 Qd5 12.Bg2 de3; 7...Na6 8.Bd4 Qd7 9.Nc3 0-0 10.Ne5 Qd8 11.e3 c5 12.bc5 Nc5) 8.Bg2 0-0 9.0-0 c5 10.Nh4 Be4 11.Be4 de4 12.bc5 Nc5; H) 7.h3 0-0 (7...Nc6 8.b5 Na5 9.e3 0-0 10.Nd4 Bh7 11.Qf3 Qd7 12.h4 e5; 7...a5 8.Nd4 ab4 9.ab4 Ra1 10.Qa1 Nc6 11.Nf5 ef5 12.b5 Nb4) 8.Bg2 Nc6 9.0-0 Qd6 10.Nh4 Bh7 11.Nf3 a6 12.d4 Ne4; I) 7.Nh4 Bh7 (7...Be4 8.Ne4 Ne4 9.Bg2 0-0 10.d3 Nd6 11.Nf3 Nc6 12.0-0 Bf6; 7...0-0 8.Nf5 ef5 9.Bg2 Nc6 10.0-0 Qd7 11.d4 Ne4 12.Qd3 Bf6; 7...Nc6 8.Nf5 ef5 9.Bg2 0-0 10.0-0 Qd7 11.d4 a6 12.Qd3 Qe6; 7...Qd7 8.Bg2 Nc6 9.Nf5 ef5 10.0-0 0-0 11.d4 Qe6 12.Qd2 Bd6) 8.Bg2 0-0 9.Nf3 Nbd7 10.0-0 c6 11.Rb1 Qc7 12.d3 b5.

6.Nd4 A) 6...Bg6 A1) 7.Bg2 c5 8.bc5 Bc5 9.Nb3 Be7 10.Nc3 0-0 11.0-0 Nc6 12.d3 e5; A2) 7.Nc3 Nbd7 (7...a5 8.Bg2 Nc6 9.Nc6 bc6 10.ba5 Ra5 11.0-0 Bd6 12.d4 0-0; 7...e5 8.Nf3 Nc6 9.Bg2 d4 10.Na4 b5 11.Nc5 Bc5 12.bc5 0-0; 7...Bd6 8.Ncb5 e5 9.Nf3 Nc6 10.Bh3 0-0 11.0-0 a6 12.Nd6 Qd6; 7...Nc6 8.Nc6 bc6 9.e3 Bd6 10.Ba6 Rb8 11.0-0 0-0 12.Na4 e5; 7...Be7 8.Bh3 Nc6 9.Nc6 bc6 10.Na4 a5 11.Nc5 Rb8 12.Bf6 Bf6; 7...c5 8.bc5 Bc5 9.e3 Bd4 10.Bb5 Nc6 11.ed4 0-0 12.Bc6 bc6) 8.Bg2 a5 9.ba5 Be7 10.0-0 0-0 11.d3 Nc5 12.Qd2 e5; A3) 7.d3 c5 (7...Nbd7 8.Nd2 c5 9.bc5 Bc5 10.Bg2 Qb6 11.N2b3 Bd6 12.a4 0-0; 7...a5 8.Nd2 Nc6 9.Nc6 bc6 10.c3 Bd6 11.Bg2 0-0 12.0-0 Ng4; 7...Nc6 8.Bg2 Bd6 9.Nc6 bc6 10.Nd2 a5 11.Bc3 ab4 12.ab4 0-0; 7...Bd6 8.Nc3 Nc6 9.Nc6 bc6 10.Bg2 a5 11.b5 Rb8 12.a4 0-0; 7...Qd7 8.Bg2 Nc6 9.0-0 Nd4 10.Bd4 Bd6 11.Nc3 e5 12.Bc5 0-0) 8.bc5 Bc5 9.Nd2 Nc6 10.Nc6 bc6 11.Nb3 Qb6 12.e3 Bd6; A4) 7.e3 c5 (7...Bd6 8.Bd3 Bd3 9.cd3 Nbd7 10.Nc3 a5 11.0-0 ab4 12.ab4 Ra1; 7...a5 8.Nc3 e5 9.Nf3 Nbd7 10.Bh3 ab4 11.ab4 Ra1 12.Qa1 Bc2; 7...Nc6 8.Bb5 Qd7 9.Nc3 Bd6 10.0-0 0-0 11.Nc6 bc6 12.Ba4 Bh5; 7...Nbd7 8.Nc3 c5 9.bc5 Bc5 10.Be2 0-0 11.0-0 e5 12.Nb3 Be7; 7...Be7 8.Nc3 Nbd7 9.Bd3 Bd3 10.cd3 a5 11.0-0 ab4 12.ab4 Ra1) 8.bc5 Bc5 9.Bb5 Nbd7 10.Nc3 a6 11.Be2 0-0 12.0-0 Ne5; B) 6...Bd6 7.Nf5 ef5 8.Bh3 g6 9.Nc3 0-0 10.0-0 Nbd7 11.Nb5 Ne5 12.Bd4 Re8; C) 6...Nc6 7.Nf5 ef5 8.Bh3 Qd7 9.b5 Na5 10.Bf6 gf6 11.e3 Nc4 12.Qh5 Qb5; D) 6...a5 7.Nf5 ef5 8.b5 Be7 9.e3 Nbd7 10.Nc3 0-0 11.Qf3 Nc5 12.Qf5 d4; E) 6...Be4 7.f3 Bg6 (7...Bh7 8.Nc3 Nc6 9.Nc6 bc6 10.e3 Bd6 11.Be2 0-0 12.0-0 Qe7) 8.Nc3 e5 9.Nb3 Be7 10.Bg2 0-0 11.0-0 Qd6 12.d4 Nbd7.

6.Bg2 a5 A) 7.b5 Bc5 (7...Nbd7 8.0-0 Bc5 9.Nc3 0-0 10.d3 Qe7 11.Qd2 a4 12.Nd1 Ng4) 8.Nc3 0-0 9.0-0 Nbd7 10.Na4 Bd6 11.d3 e5 12.Qd2 Be6; B) 7.Nc3 ab4 (7...Nbd7 8.Nd4 Bg6 9.0-0 ab4 10.ab4 Bb4 11.Ra8 Qa8 12.Ncb5 0-0) 8.ab4 Ra1 9.Qa1 Nc6 10.Qa4 Nd7 11.Nb5 Nb4 12.Nbd4 b5.

6.Bg2 c5 A) 7.Nh4 Bh7 (7...Be4 8.Be4 Ne4 9.0-0 Nc6 10.Nc3 Nc3 11.Bc3 cb4 12.ab4 Bb4; 7...cb4 8.Nf5 ef5 9.ab4 Bb4 10.c4 0-0 11.cd5 Nbd7 12.Bd4 Bc5) 8.c4 cb4 9.ab4 Bb4 10.cd5 ed5 11.Nc3 Nc6 12.0-0 a5; B) 7.Nc3 cb4 (7...Nc6 8.b5 Nd4 9.d3 Bd6 10.Nh4 Qa5 11.Nf5 Nf5 12.0-0 Be5) 8.ab4 Bb4 9.Nd4 Nc6 10.Nf5 ef5 11.Nb5 0-0 12.Bf6 Qf6; C) 7.0-0 cb4 (7...Be7 8.Nh4 Bh7 9.bc5 Bc5 10.c4 Nc6 11.cd5 Nd5 12.Nc3 Nc3; 7...Nc6 8.b5 Na5 9.d3 Bd6 10.Nh4 Bh7 11.Nd2 0-0 12.e4 d4) 8.Nd4 Nc6 9.Nf5 ef5 10.c3 ba3 11.Na3 Qb6 12.Rb1 Qa6.

6.Bg2 Nc6 A) 7.0-0 Bd6 (7...Be7 8.b5 Na5 9.d3 0-0 10.Nc3 a6 11.Qd2 ab5 12.Nb5 Qd7; 7...a6 8.Nh4 Bh7 9.Nc3 Be7 10.d3 0-0 11.Qd2 Qd6 12.e3 Ng4) 8.b5 Na5 9.d3 0-0 10.Nc3 c5 11.bc6 Nc6 12.Nb5 e5; B) 7.b5 Na5 (7...Ne7 8.Nc3 a6 9.0-0 d4 10.Na2 c5 11.bc6 Nc6 12.Nb4 Bb4) 8.0-0 a6 9.d3 ab5 10.Nc3 b4 11.ab4 Bb4 12.e4 de4; C) 7.Nh4 Be4 (7...Bh7 8.b5 Na5 9.d3 a6 10.a4 Qd7 11.Bd4 c5 12.Bf6 gf6; 7...Bg4 8.Nc3 a5 9.b5 Nd4 10.h3 Bh5 11.g4 Nd7 12.Nf3 Nf3; 7...Be7 8.Nf5 ef5 9.Nc3 0-0 10.0-0 Qd7 11.d4 Ne4 12.Qd3 Bf6) 8.Be4 Ne4 9.0-0 Nd6 10.d3 Be7 11.Nf3 0-0 12.Nc3 Bf6; D) 7.d3 Bd6 (7...Qd7 8.0-0 Bd6 9.b5 Ne7 10.Bf6 gf6 11.Nc3 a6 12.e4 Bg4; 7...a6 8.Nh4 Bh7 9.0-0 Bd6 10.c4 0-0 11.Nc3 dc4 12.dc4 Ng4; 7...b5 8.Nc3 a5 9.0-0 ab4 10.ab4 Bb4 11.Ra8 Qa8 12.Nb5 Qb7) 8.b5 Ne7 9.0-0 a6 10.Bf6 gf6 11.Nc3 ab5 12.Nb5 Bc5; E) 7.Nc3 Be7 (7...Bd6 8.Nh4 Bh7 9.Nb5 Be7 10.0-0 0-0 11.Nd4 a5 12.Nc6 bc6; 7...a6 8.0-0 Bd6 9.Nh4 Bg4 10.Na4 0-0 11.Nc5 Bc5 12.bc5 e5) 8.b5 Na5 9.d3 0-0 10.0-0 a6 11.Qd2 ab5 12.Nb5 Qd7.

6.Bg2 Bd6 A) 7.Nc3 Nc6 (7...c6 8.Nd4 0-0 9.Nf5 ef5 10.e3 Nbd7 11.Qf3 g6 12.0-0 Ne5; 7...0-0 8.Nd4 c6 9.f4 Nbd7 10.0-0 Bg6 11.d3 a5 12.e3 ab4) 8.Nh4 Bh7 9.Nb5 0-0 10.Nd6 cd6 11.d3 e5 12.0-0 Qb6; B) 7.Nh4 Be4 (7...Bh7 8.Nc3 a6 9.0-0 0-0 10.Re1 Nbd7 11.d3 c5 12.e4 d4; 7...c6 8.0-0 0-0 9.Bd4 Bg4 10.f4 Na6 11.Nc3 c5 12.Bf6 Qf6; 7...Nbd7 8.Nf5 ef5 9.c4 dc4 10.Bb7 Rb8 11.Bg2 0-0 12.Qc2 a5) 8.Be4 Ne4 9.Bg7 Rg8 10.Bb2 a5 11.d3 Nf6 12.Nd2 Nbd7; C) 7.Nd4 Be4 (7...Bg6 8.Nc3 Nc6 9.Nc6 bc6 10.0-0 0-0 11.Na4 a5 12.Nc5 Qe7; 7...0-0 8.Nf5 ef5 9.c4 c6 10.cd5 Nd5 11.Nc3 Nc3 12.Bc3 Nd7; 7...c6 8.Nf5 ef5 9.Bh3 g6 10.Bd4 0-0 11.Nc3 Nbd7 12.Be3 Kg7; 7...Bg4 8.f3 Bh5 9.Nc3 Nc6 10.Ncb5 Nd4 11.Nd6 cd6 12.Bd4 e5; 7...Bh7 8.Nc3 Nc6 9.Nc6 bc6 10.0-0 0-0 11.Na4 Bf5 12.d3 a5) 8.f3 Bg6 9.Nc3 Nc6 10.Ncb5 Nd4 11.Bd4 e5 12.Bb2 0-0.

6.Bg2 Be7 7.Nc3 (7.Nd4 Nc6 (7...0-0 8.Nf5 ef5 9.Nc3 Qd7 10.e3 Nc6 11.0-0 a6 12.Qe2 Qe6; 7...Bg6 8.c4 Nc6 9.cd5 ed5 10.Nc6 bc6 11.Qa4 0-0 12.Qc6 a5; 7...Be4 8.0-0 Bg2 9.Kg2 Nc6 10.Nc6 bc6 11.Bf6 Bf6 12.Nc3 0-0; 7...Bh7 8.0-0 0-0 9.Nc3 Nbd7 10.f4 e5 11.fe5 Ne5 12.Rf6 Bf6) 8.Nf5 ef5 9.Nc3 0-0 10.0-0 Qd7 11.e3 Qe6 12.f4 Ne4; 7.0-0 Nbd7 (7...0-0 8.Nc3 Nbd7 9.e3 a5 10.b5 e5 11.d3 c6 12.e4 Be6; 7...Nc6 8.b5 Na5 9.d3 0-0 10.Nc3 a6 11.Qd2 ab5 12.Nb5 Qd7; 7...a6 8.Nd4 Nc6 9.Nf5 ef5 10.Nc3 0-0 11.d4 Qd7 12.Qd3 Qe6; 7...c5 8.bc5 Bc5 9.Nh4 Be4 10.Nf3 0-0 11.d3 Bg6 12.Nbd2 Nc6) 8.Nh4 Bh7 9.Nc3 0-0 10.Nf3 a5 11.b5 Nb6 12.d3 Qd6) 7...0-0 (7...Nc6 8.0-0 0-0 9.b5 Na5 10.d3 a6 11.Qd2 ab5 12.Nb5 Qd7; 7...a6 8.Nd4 Nc6 9.Nf5 ef5 10.d4 0-0 11.0-0 Qd7 12.Qd3 Qe6; 7...Nbd7 8.0-0 0-0 9.e3 c5 10.bc5 Nc5 11.Nd4 Qb6 12.Nf5 ef5) 8.0-0 (8.Nd4 Bg6 9.0-0 e5 10.Nb3 Nc6 11.b5 Nd4 12.Nd4 ed4) 8...Nbd7 (8...Nc6 9.b5 Na5 10.d3 a6 11.Qd2 ab5 12.Nb5 Qd7) 9.d3 c5 (9...a5 10.b5 Nc5 11.Qd2 Qd6 12.Nd4 Bh7) 10.bc5 Nc5 11.Qd2 Rc8 (11...Qb6 12.Rab1 Rfc8) 12.Nd1 (12.Rab1 a6) 12...Qc7 (12...Rc6=) 13.Ne3 Bg6 14.Rab1 b6 15.Be5 Qd7 16.Bd4 Na4 17.c4 dc4 (worse is 17...Ba3 18.Ra1 Be7 19.Ne5+/–) 18.Nc4 Nc5 (18...Rc4 19.dc4 Bb1 20.Ne5=) 19.Nce5+= Qd6 20.Rfc1 Bh7 21.Rb4 Nd5 22.Rb2 Rfd8 23.e4 Nf6 (23...Nc7 24.Rbb1=) 24.Rbb1 Qb8 25.Qb4 Bf8 26.Qb2 Be7 27.Rc4 +=. marere – iure, internet, 2011.

7.0-0 a5 8.b5 Bc5 9.Nc3 0-0 10.d3 Qe7 11.Qd2 Nb6 12.Ne5 Bd6.

7.0-0 Nb6 8.Bd4 a5 9.b5 Bd6 10.d3 Qe7 11.Ne5 0-0 12.Qd2 Rfd8.

7.0-0 c6 8.d3 Be7 9.Nbd2 0-0 10.c4 Rc8 11.Re1 b6 12.e4 Bh7 13.Qa4 Qc7 14.Rac1 de4 15.de4 Rfd8 (15...e5 16.Nh4=) 16.e5+= Ne8 17.Nd4 White prepares the advance b5 17...Ne5 18.Ne6 fe6 19.Be5 Bd6 20.Nf3 c5 21.b5 Be5 22.Ne5 Rd2 23.Bh3 Bf5 24.Bf5 ef5 25.Nc6 Rd7 26.Qc2 Nd6 27.f3 (27.Rcd1 Rf8+/-) 27...Rf7 (27...Rf8 28.Rcd1+=) 28.Qd3 Re8 29.Qd5 Re1 30.Re1 Kh8 (better 30...Kh7!?+/-) 31.Re6+- Rd7? (better 31...Rf6+-) 32.Ne5 (32.Ne5 Rd8 33.Rd6 Rd6 34.Qd6 Qd6 35.Nf7 Kg8 36.Nd6+-) 1-0. Valenta,V jr (2060) - Martinovsky,M (1660), 20th Liberec Open, 2020.

7.0-0 c6 8.Nh4 Bh7 9.Nc3 Bd6 10.d3 0-0 11.Qd2 a5 12.e4 Re8.

7.0-0 Bd6 8.Nc3 c6 9.d3 0-0 10.Qd2 Bg4 11.Rab1 Qc7 12.Rfe1 e5.

7.0-0 Be7 8.Bd4 a5 9.b5 0-0 10.Nc3 Bc5 11.Na4 Bd6 12.c4 dc4.

7.Nc3 Be7 (7...a5 8.ba5 Be7 9.0-0 0-0 10.Nb5 c5 11.a4 Qa5 12.d3 Rfe8; 7...c6 8.Nd4 Bd6 9.0-0 0-0 10.d3 Bg6 11.Qd2 e5 12.Nb3 Re8; 7...Bd6 8.Nb5 0-0 9.0-0 e5 10.d3 Qe7 11.c4 c6 12.Nd6 Qd6; 7...Nb6 8.Nd4 Nc4 9.Nf5 ef5 10.Bc1 a5 11.d3 Ne5 12.d4 Nc4) 8.0-0 0-0 9.d3 a5 10.b5 Nc5 11.Qd2 Qd6 12.Nd4 Bg6.

7.c4 dc4 (7...c5 8.Nc3 dc4 9.Nh4 cb4 10.ab4 Qb6 11.Nf5 ef5 12.Ra5 a6; 7...a5 8.cd5 ed5 9.Nd4 Be4 10.f3 Bg6 11.Nc3 ab4 12.ab4 Ra1; 7...Nb6 8.cd5 ed5 9.Nd4 Be4 10.f3 Bg6 11.Nc3 Nc4 12.Qb3 a5; 7...Be7 8.cd5 Nd5 9.Bg7 Rg8 10.Bh6 Bf6 11.d4 a5 12.Nbd2 Rh8) 8.Nc3 Bd6 9.Nd4 c6 10.Nf5 ef5 11.Qc2 g6 12.b5 Rc8.

7.Nd4 Bg6 (7...Be4 8.f3 Bg6 9.Nc3 a5 10.ba5 Ra5 11.Nb3 Ra6 12.0-0 Be7; 7...c6 8.Nf5 ef5 9.0-0 Bd6 10.d4 Nb6 11.Qd3 0-0 12.Qf5 Nc4; 7...Bh7 8.Nc3 Be7 9.d3 0-0 10.0-0 c5 11.bc5 Nc5 12.Qd2 e5) 8.Nc3 Be7 9.0-0 0-0 10.f4 e5 11.Nf5 Bf5 12.fe5 Ne5.

5.a3 c5 6.bc5 Bc5 7.d4 (7.e3 0-0=) 7...Bb6 8.Nbd2 0-0 9.Nb3 Nbd7 10.e3 Rc8 Attacks the backward pawn on c2 11.Bd3 Bd3 12.Qd3 Ne4 13.0-0 Ndf6 14.Rad1 h6 15.Ne5 Qc7 16.Rc1 a6 17.Rfe1 (17.c4!? Qd8 18.c5=) 17...Nd6+= 18.a4 Nc4 19.Ba1 Ne5 20.de5 Nd7 21.Bd4 ½–½. Radwan,Jan (1715) – Szymik,Antoni (1715), Turniej Szachowy Niepelnosprawnych Poland, 2010.

5.a3 h6 6.Nc3 c6 7.g4 Bh7 8.d4 Nbd7 9.e3 Qc7 10.Bd3 Bd3 11.Qd3 Bd6 12.0-0 a6 13.Rad1 b5 14.Nd2 (14.e4 de4 15.Ne4 Ne4 16.Qe4 Nf6-/+) 14...g5 15.e4 Bf4 16.e5 Ng8 (16...h5 17.f3 (worse is 17.ef6 hg4 18.Qe2 gh3-/+) 17...Ng8 18.Ne2+=) 17.Ne2= Bd2 18.Qd2 Nb6 19.f4 Nc4 20.Qc1 h5 21.Rd3 (21.gh5!? Rh5 22.Rd3+=) 21...hg4-/+ (21...Nb2?! 22.Qb2 hg4 23.hg4 gf4 24.Rf4+=) 22.fg5 Qe7 23.Bc3 Rh5 24.Rf6? (better is 24.g6 fg6 25.hg4+=) 24...Nf6-+ 25.gf6 Qf8 26.hg4 Rh4 27.Qg5 Qh8 28.Ng3 Rh6 (28...Rh7 29.Bd2-+) 29.Qg7 Rh7 30.Qh8 Rh8 31.Nh5 Kd7 (31...Na3 32.Rd2-+) 32.Be1-/+ Rag8 33.Ng7 Rh7 34.Kg2 Rgh8 35.Nh5 Rh5 (better is 35...Rd8!?-/+) 36.gh5= Rh5 37.Rg3 Rh8 38.Kg1 Ke8 39.Kf1 Kf8 40.Kg2 (40.Bf2 Rh2=) 40...Rg8+= 41.Rg8 Kg8 42.Kf3 Kh7 43.Ke2 Kg6 44.Kd3 Na3 45.c3 (45.Bd2 Nc4+=) 45...Kf5 46.Bd2 Nc4 47.Bh6 Kg4 48.Ke2 Kf5 49.Bg7 (better is 49.Kd3=) 49...Ke4 50.Bh8? (better is 50.Bf8-/+) 50...a5-+ 51.ba5 Na5 52.Bg7 b4! 53.cb4 Nb3 54.Bf8 Nd4 55.Kd2 Ke5 56.Be7 Nb5 57.Kd3 Kf5 58.Bd8 e5 59.Ke3 Ke6 60.Kf3 Nd6 61.Kg4 Ne4 0–1. Kruchinin,Anatoly V (1860) – Frolov,Nikolai, Nizhnij Novgorod Region–ch, 2007.

5.b5 Be7 6.a4 0-0=+ 7.Ba3 Ba3 8.Na3 c6 9.c4 dc4 10.Nc4 a6 11.d3 ab5 (worse 11...cb5 12.ab5 Bg6 13.Nce5=) 12.ab5 Ra1 13.Qa1 cb5 14.Nce5 Qb6 (14...Nc6 15.e4 Ne5 16.Ne5=+) 15.e4 Bg6 16.Be2 Nfd7 (16...Nc6 17.Ng6 hg6 18.0-0=+) 17.0-0 (17.Ng6 fg6 18.0-0 Nc6=) 17...Ne5=+ 18.Ne5 b4 (18...Rd8 19.h4 h6 20.h5=+) 19.Nc4 (19.Rd1 Qd6=) 19...Qa6 20.Qb2 Nc6 21.Nd6 (21.Ra1 Qb5=+) 21...Ra8 22.Re1 (22.Rb1 Qa7-/+) 22...Qa3 23.Qb1 b3 24.Nc4 Qa2 25.Nb6 (25.f4 Nd4 26.Bg4 b5-+) 25...Ra5 (25...Ra6 26.Nc4-+) 26.Nc4-/+ Ra7 27.Kh2 (27.Qc1 Qc2 28.h4 Ra2 29.Qc2 bc2-+ (29...Rc2?! 30.h5 b2 31.Nb2 Bh5 32.Bh5 Rb2 33.e5-+)) 27...Nb4 (better 27...Nd4!? 28.Qc1 Ne2-+) 28.Qc1-/+ Nc2 29.Nb2 (29.Rf1 Ra8-/+) 29...h6 (29...Qa5 30.Rf1-/+) 30.Rh1 Qa1 (30...Ra8-/+) 31.Nc4? (31.Qf4 Qa5-/+) 31...b2 (31...Qc1!? 32.Rc1 b5 33.Nd2-+) 32.Qb2 (32.Nb2 Qc1 33.Rc1 Nd4-/+) 32...Qb2 33.Nb2 b5 (33...Ra2 34.Nc4 Nd4 35.Bf3-/+) 34.Rc1 Nd4 35.Rc8 Kh7 36.Rb8?? (better 36.Bf3-+) 36...Ne2 (better 36...Ra2 37.Bg4 Rb2 38.Rd8-+) 37.Rb5 Nd4 38.Rc5 (38.Rb6 e5-+) 38...Ra2 39.Nc4 Rf2 40.Ne3 (40.Ne5 f6 41.Ng4 Rd2-+) 40...Nf3 (40...Re2 41.Nf1 Nf3 42.Kh1-+) 41.Kg3 Rd2 (better 41...Ne1 42.Kf2 Nd3 43.Kg3 Nc5-+) 42.gf3-/+ Rd3 43.Re5?? (better 43.Kf2-/+) 43...Re3-+ 44.Kf4 (44.Kf2 Rc3-+) 44...Re1 (44...Rd3 45.Kg4-+) 45.Rb5 (45.h4 h5-+) 45...h5 46.Rb7 1–0. TWW_LONDON (1745) – Cerma (1745), lichess.org, 2021.

5.Nc3 Bb4-/+ 6.a3 Ba5 7.e3 0-0 8.Nd4 Bg6 9.Be2 Nbd7 10.0-0 a6 11.Bf3 c5 12.Nb3 Bb6 13.d4 cd4 14.ed4 Rc8 15.Ne2?? (better is 15.Re1-+) 15...Bc2 16.Qd2 Bb3 17.Nf4 (17.Rfc1 Bc4-+) 17...Bc4 (17...Rc2 18.Qb4 Rb2 19.Qc3-+) 18.Nh5 (18.Rfc1 Bc7-+) 18...Nh5 19.Rfe1 (19.Bh5 Bf1 20.Rf1 Ba5-+) 19...Nhf6 20.Qe3 Qe7 21.Bc3 Qd6 22.Bb4 Nc5! 23.dc5 Bc5 24.Bc5 Qc5 25.Qg5 Bd3 26.h4 Be4 27.Be2 h6 28.Qg3 Bh7 29.Bf3 Be4 30.Be4?? Ne4-+ 31.Qf3 Qa5 32.Qe3 Rc3 33.Qd4 Ra3 34.Ra3 Qa3 35.f3 Qc5 36.Qc5 Nc5 0–1. Billion,Paul – Hinestroza,Douglas, SN–2011–0-00395, 2011.

5.e3 Bb4-/+ 6.Bb5 c6 7.Ba4 b5 8.Bb3 c5 9.a3 Ba5 10.c3 (10.0-0!?-/+) 10...c4-+ 11.Bc2 Bc2 12.Qc2 Nbd7 13.0-0 (13.a4 ba4 14.Qa4 Bc7-/+) 13...0-0 (13...Nc5 14.Nd4-+) 14.Nd4 a6 15.Nc6 (15.a4 ba4 16.Ba3 Re8-+) 15...Qc7 16.Nd4 Bb6 17.Nf3 Qd6 (17...Nc5 18.Ne1-+) 18.d4 Bc7 (18...cd3!? 19.Qd3 Nc5 20.Qc2-+) 19.Nbd2 h6 20.a4 Nh7?? (better 20...Rfb8-+) 21.Ba3+= Qc6 22.Bf8 Rf8 23.ab5 ab5 24.Qa2 Qd6 25.Qa3 Qc6 26.Qb4 Nb6 (26...Rb8!?+=) 27.Ra6+- Qb7 28.Rfa1 Rb8 (better 28...Nc8!?+-) 29.Ra7 Qc6 (29...Qc8 30.Qe7 Ra8 31.R1a6 Ra7 32.Ra7+-) 30.Qe7 (better 30.Qc5 Qc5 31.dc5+-) 30...Rb7 (30...Rc8 31.Ne5 Be5 32.Qf7 (32.de5?! Qe8+-) 32...Kh8 33.de5+-) 31.Rb7 (better 31.Ne5 Be5 32.Rb7+-) 31...Qb7 32.Ne5 f6 (32...Nf6 33.Qf7 Kh7 34.Qe6 Na4+-) 33.Qf7 Kh8 34.Ng6 1–0. alessandrocarvalhaes (1675) – zach75lechte (1925), lichess.org, 2018.

4.b5 c6 5.a4 e6 6.e3 Bb4 7.Nd4 Ne7 (7...Nh6 8.Nf5 Nf5 9.Bd3=) 8.Nf5 Nf5 (< 8...ef5 9.Qh5 Kd7 10.Bd3+/–) 9.c3 Ba5 10.Be2 Bb6 11.Bh5 g6 12.Bg4 0-0 13.0-0 Qd6 14.Qc2 cb5 15.ab5 Nd7 16.Ba3 Bc5 17.Bb2 Ne5?? (better is 17...Rfc8=) 18.Bf5+- ef5 19.d4 Nf3?? (better is 19...Ng4 20.g3 Qb6+-) 20.gf3 Bb6 21.Ba3 Qe6 22.Bf8 Rf8 23.Nd2 Qd6 24.f4 g5 (24...Rc8 25.Rfc1+-) 25.fg5 fg5 26.Nf3 g4 27.Ne5 Qh6 28.f4 gf3 29.Rf3 Qg5 (29...Kh8 30.Kh1 Qe6 31.c4+-) 30.Qg2 (better is 30.Rg3 Qg3 31.hg3 Kg7+-) 30...Qg2 31.Kg2 (31...Kh8 32.c4 dc4 33.Nc4+-) 1–0. GULP – hgflyer, Live Game Caissa's Web, 2004.

4.d3 e5 5.Nbd2 Bb4-/+ 6.a3 (6.e4 de4 7.de4 Be6-/+) 6...Bd6 (6...Bd2 7.Nd2 Nc6 8.Rb1-/+) 7.e4=+ de4 8.de4 Bg6 9.Bd3 Ne7 10.Nh4 (10.Qe2 Nbc6=+) 10...Bf7-/+ 11.Nf5 (11.Qg4 0-0-/+) 11...Nf5 12.ef5 Nd7 13.Qf3 c6 (13...Nc5 14.Bc4-/+) 14.0-0 0-0 15.Nc4 Bd5 16.Qe2 (16.Qg4 Nc5-/+) 16...Nb6 (16...Nc5 17.Nd6 Qd6 18.Rfd1-/+) 17.Nd6 Qd6 18.Rad1 Qc5 19.Rfe1 Rad8 20.Be4 (20.Bc1!?-/+) 20...Nc4 21.Bd5 Rd5 22.Rd5 cd5 23.Bc3 (better 23.Bc1-+) 23...Na3 24.Qd2 Nc4 25.Bb4 (25.Qd3 a5-+) 25...Nd2 26.Bc5 Rc8 27.Ba7 Rc2 28.g3 (28.f4 Ra2 29.Be3 Nc4-+) 28...Rb2 (28...Nf3 29.Kf1 Ne1 30.Ke1-+) 29.Be3 (29.Ra1 Ne4-+) 29...Nc4 (better 29...Nf3 30.Kf1 Ne1 31.Ke1-+) 30.Bc1 (30.Rc1 b5 31.Bc5 b4-+) 30...Rb1 31.Kg2 d4 0-1. psgallar - VHV2, Rated Classical game, lichess.org, 2013.

4.Nd4 Qd7 5.Nf5= Qf5 6.b5 e5 7.e3 c5 8.Nc3 e4 9.d3 Nd7 10.a4 (10.g4 Qe6 11.de4 de4+/–) 10...Be7 11.Be2 0-0-0 12.Bg4 Qe5 13.d4 Qd6? (13...Qg5 14.h4 Qg6 15.Nd5+/–) 14.Ba3?? (better is 14.dc5 Qc5 15.Nd5+-) 14...Kb8+/– 15.a5 g6 16.b6 a6 (16...ab6 17.dc5 Double attack (17.dc5 Decoy)) 17.dc5 Nc5 18.0-0 f5 19.Be2 (better is 19.Qd4 Bf6 20.Bc5+=) 19...Bf6?? (19...Qe5 20.Bb2 Ne6 21.Na4=) 20.Qe1?? (better is 20.Na4! Rc8 21.c4+-) 20...Qc6+= 21.Rc1 Ne7 22.Nb1 d4 23.Qb4 Ne6 24.Bc4 Nd5 25.Qb3 Nc5 26.Bc5+= Qc5 27.Bd5 Rd5-/+ 28.c4 Rd6 29.ed4 Rd4 30.Qa2 Rhd8 31.Qe2 Bg5 32.Rc2 Be7 33.Nd2 Qb4 34.Nb1 Qa5 35.Rb2 Qc5 36.Nd2 Qc6 37.Nb3 Rd3 38.Na5? Qc5 39.Nb3 Qc4 40.Nc1 Rc3 41.Qe1 Ba3 42.Rb1 Rc1 43.Rc1 Qc1 44.Qc1 Bc1 45.Rc1 Rd6 46.Rb1 Rd2 47.g3 a5 48.Kf1 Ra2 49.Rd1 Kc8 50.Rc1 Kd7 51.Rc7 Kd6 52.Rb7 Rb2 53.Ra7 Rb5 54.Rh7 Kc6 55.b7 1–0. Ovcharenko,Leonid – Panchenko,Makar, Vladivostok op, 2008.

4.Nd4 Bg4 5.h3 Bc8 6.a3 +=.

4.e3 a6 5.Nd4 Bg6 6.Ne6 Qd6 7.Nf8 Kf8 8.a3 e5 9.Be2 Ne7 10.0-0 h5 11.d4 e4 12.c4 c6 13.c5 Qc7 14.Nc3 h4 15.Rc1 Nf5 16.a4 h3 17.g3 Nd7 18.b5 ab5 19.ab5 Kf7 20.Qb3 Rab8 21.b6 Qd8 22.Ne4 Nf8 23.Nc3 Ne6 24.Ra1 Ng5 25.Ra4 Qe7 26.Rfa1 Ne3 27.fe3 Qe3 28.Kh1 Be4 29.Ne4 Qb3 30.Ng5 fg5 31.R4a2 Qe3 32.Rf1 Kg6 33.Bc1 Qd4 0–1. Machete99 (2265) – shmikci (1805), ICC, 2002.

4.e3 Nc6 5.a3 e5 6.c4 a6 7.Nc3 d4 8.ed4 ed4 9.Nd5 Bd6 10.Bd4 Bg4 11.Be2?? Nge7?? (12.Bf6 0-0+/–; better is 11...Bf3 12.Bf6 Nf6 13.Bf3 0-0-+) 0–1. coloplayah (2175) – cruciverbalist (1840), net–chess.com, 2006.

4.e3 e6 5.c4 c6 6.cd5 ed5 7.a3 Bd6 8.Be2 Ne7 9.0-0 0-0 10.Qb3 Kh8 11.Nc3 (11.Nd4 Bd7=) 11...Bg6 (11...Re8 12.Nd4=) 12.Nd4 Bf7 (12...Qd7 13.Na4=) 13.f4+= Nd7 14.Qc2 Bg6 15.Bd3 Bd3 16.Qd3 Rc8? (16...Re8 17.Rf3+=) 17.Nce2 (17.Ne6 Qe8 18.Nf8 Nf8+-) 17...a6? (17...Re8 18.Ne6 Qb6 19.Bd4=) 18.Rac1 (18.Ne6 Qe8 19.Nf8 Qf8+-) 18...Nb6? (18...Re8 19.Ne6 Qb6 20.Rf3=) 19.Nf5?? (better 19.Ne6 Qd7 20.Nf8 Rf8 21.Bd4+-) 19...Nf5= 20.Qf5 Nc4 21.Bc3 (better 21.Rc2!?=) 21...Na3-/+ 22.Rf3 (22.Nd4 Qe7-/+) 22...Nb5 23.Rh3 h6 24.Ba1 (24.Ra1!?-/+) 24...Bb4-+ 25.Qg6 Qe8 (25...Bd2?! 26.Rh6 gh6 27.Qh6 Kg8 28.Qg6 Kh8 29.Qh6 Kg8 30.Qg6 Kh8 31.Qh6=) 26.Qc2 Qf7 27.Ng3 Nd6 28.Rf1 (28.Bc3 Bc3 29.Qc3 Qg6-+) 28...Rce8 29.Rf3 Ne4 30.Nf5? (30.Nf1-+) 30...Nd2 (better 30...Bd2 31.Ng3 Bb4 32.Ne4 Re4-+) 31.Rfg3= Ne4 32.Nh6 gh6 33.Rh6 Qh7 34.Rgh3 (34.Rh7 Kh7 Combination) 34...Rf7 (34...Qh6! 35.Rh6 Kg7-/+) 35.Rh7 Rh7 36.Rh7 Kh7 37.Bf6 Be1 (37...Kg6!? 38.Bd4 c5+=) 38.Bd4 Rc8?? (38...Bf2!? 39.Kf1 Kg8+/-) 39.Qb1 (better 39.Qe2 Bf2 40.Kf1 Be3 41.Qh5 Kg8 42.Qg4 Kf7 43.Qd7 Kf8 44.Qc8 Ke7 45.Be3+-) 39...c5?? (39...Bf2 40.Kf1 Rc7+-) 40.Qb7 (40.Qb7 Rc7 41.Qc7 Kg6 42.Qg7 Kf5 43.Qf7 Kg4 44.Qg6 Kh4 45.Qh7 Kg4 46.Qh3) 1-0. carlos78 (2170) - Germain (1990), Rated Blitz game, lichess.org, 2015.

4.e3 Nh6 5.Be2 Bg6 6.0-0 Nf7 7.d4 a6 8.c4 dc4 9.Bc4 Nd6 10.Bb3 Nd7 11.Nbd2 Nb6 12.Re1 Bd3 13.e4 g6 14.Rc1 Bg7 (better is 14...Bh6!?+-) 15.a4 f5? (15...a5 16.Rc3 Ba6 17.b5 Bb5 18.ab5+-) 16.e5 (better is 16.Ng5 Qb8 17.Ne6+-) 16...Ne4 17.Ne4 Be4 18.Ng5 Bd5 19.a5 (19.Rc5 c6 20.Bd5 Nd5+-) 19...Bb3 20.Qb3 Nd5?? (better is 20...Qd5 21.Qc2 Bh6+-) 21.Ne6 Qd7 22.Qd5!! Qd5 23.Nc7 Kf7 24.Nd5 e6 (24...Rad8 25.e6 Ke8 26.Ne7 Bf6+-) 25.Rc7 Kf8 26.Nb6 Rd8 27.Rb7 Kg8 28.g3 (28.Nd7 h6+-) 28...g5 (28...Bf8 29.Nd7 Rd7 30.Rd7+-) 29.Rc1 h5 30.Rcc7 Bh6 (30...Rh7+-) 31.Nd7 h4 32.Nf6 Kf8 33.Rf7 1–0. whitecat25 – themuttsknutts, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 f6)

4.Nh4 Be4 =.

5.e3 Nb6 6.Nbd2 e6 7.Be2 (7.a3!?=) 7...Bb4+= 8.c3 Ba5?? (8...Bd6 9.0-0-/+) 9.0-0?? (better is 9.Nb3 Bc3 10.Bc3+-) 9...Na4?? (better is 9...c6+=) 10.Qa4+- c6 11.Ba3 (11.Nh4 Bg6+-) 11...Ne7 (11...Bc3 12.Qb3 Ba1 13.Qb7+- (13.Ra1?! Qd7+=)) 12.c4 Bd2 13.Nd2 0-0 (13...a6 14.Rfc1+-) 14.Rac1 (14.Qb4 Re8+-) 14...e5 (14...Rf7 15.Bc5+-) 15.Qb4 ed4 (15...Re8 16.de5 (worse is 16.Qb7 Qb6 17.Qb6 ab6+-) 16...fe5 17.cd5 (17.Qb7?! Qb6 18.Qb6 ab6+-) 17...Nd5 18.Qb7 Ne3 19.Qb3 Nd5 20.Rc6+-) 16.Qe7 Qe7 17.Be7 Rfe8 18.Bc5 d3 19.Bf3 Be4 (19...dc4 20.Nc4 Re6 21.Nd6+-) 20.Ne4 (better is 20.cd5 cd5 21.Bd4 Re7+-) 20...de4 21.Bd1 b6 22.Bb4 (22.Bd6 Kf7+-) 22...c5 23.Bc3 Rab8 24.a4 (24.Ba4 Re6+-) 24...a5 (24...Rbd8 25.a5+-) 25.Bg4 Rbd8 26.Rcd1 Kf7 (26...Rd6 27.f3+-) 27.Rd2 (27.f3 Rd6+-) 27...g6 28.f3 (28.Bh3 f5+-) 28...f5 29.Bh3 ef3 30.Rf3 (30.gf3 Re3 31.Kf2 Rde8+-) 30...Re4 31.Rf4 Re3 32.Bf5! Re1?? (32...gf5 33.Rf5 Combination) 33.Kf2 Re2 34.Re2 de2 35.Bd3 (better is 35.Be4!? Ke6 36.Rf6 Kd7 37.Rb6 Re8 38.Bc6 Kc7+-) 35...Kg8 (35...Ke8 36.Be2 Rd6 37.Re4 Kf7 38.Bf3+-) 36.Be2 1–0. overtoom – sheldonpaz, gameknot.com, 2013.

5.e3 e6 6.a3 Bd6 7.Be2 Ne7 8.0-0 0-0 9.Nbd2 b6 (9...Nb6 10.c4 Nc4 11.Nc4 dc4 12.Bc4=) 10.c4 c5 11.bc5 bc5 12.cd5 ed5 (< 12...Nd5 13.e4 Rb8 14.ed5 Rb2 15.Nc4+/–) 13.dc5 Nc5 14.Nd4 (14.Bd4 Qa5=) 14...Bd3 (better is 14...Bh2!? 15.Kh2 Qb8 16.Kg1 Qb2 17.Nf5 Nf5=+) 15.Bd3 Nd3 16.Ne6 Qb8 17.Nf8 Bh2 18.Kh1+= Nb2 19.Qh5 Qf8 20.Kh2+/– Qf7 21.Qf7 Kf7 22.Rfb1 Nc4 23.Nc4 dc4 24.Rb7 Ke6+/– 25.Rc1 Rc8 26.Ra7 c3 27.Kg3 Nf5 28.Kh2?? h5?? 29.a4 g6+/– 30.a5 g5 31.a6 Nd6 32.Rh7 h4? 33.a7 c2 34.Rc2! (34...Ra8 35.Rb2+-) 1–0. Gegonz – leganes (1635), internet, 2007.

5.a3!? =.

5.e3 e5-/+ 6.Nf3 Bb4 7.c4 Be6 8.Qa4 Nc6 9.a3 Ba5 10.c5 (10.cd5 Qd5 11.Bb5 Bd7+=) 10...a6 11.Be2 Nge7 12.0-0 b5 13.Qb3 Nb8 (13...Qd7 14.d4 e4 15.Nfd2-/+) 14.d4 e4 15.Nfd2 Bf7 (15...Qd7 16.Bc3 Nbc6 17.Bb4+=) 16.Qc2 c6 17.a4 Nd7 18.Nb3 Bc7 19.N1d2 0-0 20.Ra2 Qb8 21.h3 f5 22.Rfa1 (22.ab5 ab5 23.Ra8 Qa8-/+) 22...Qb7 (22...b4 23.f4-/+) 23.Rc1 (23.ab5 ab5 24.Na5 Ba5 25.Ra5 Ra5 26.Ra5 f4-/+) 23...Nf6 24.Qd1 g5 (24...f4 25.ab5 ab5 26.Ra8 Ra8 27.ef4-+) 25.Nf1 h6 (25...b4 26.Raa1-/+) 26.Nbd2 Kh7 27.Rca1 Rg8 28.ab5+= ab5 29.f3 Ra2 30.Ra2 Ra8 31.Qa1 Ra2 32.Qa2 Nd7 33.fe4= fe4 34.Ne4 Bg6 35.Nf2 Nf6 36.Qb3 Qc8 37.Nd2 Qd7 38.Bf3 Ba5 39.Nf1 Bc7 40.Bc3 Kg7 41.Nd2 Bg3 42.Nh1 Bc7 43.Nf2 Bg3 44.Nh1 Bc7 ½–½. Ehrlich,Hans Georg (1920) – Denkler,Juergen (1760), Muensterland Verbandsklasse–B, 2003.

5.f4 e5-/+ 6.fe5 fe5 (worse is 6...Bb4 7.e6 Bc8 8.e4+=) 7.Nf3 e4 (worse is 7...Bb4 8.Be5 Nf6 9.Nc3+=) 8.Ng1 (8.Nd4 Bd6 (8...Bb4?! 9.Ne6 Be6 10.Bg7=) 9.g3 Nf6-/+ (worse is 9...Bb4 10.Ne6 Be6 11.Bg7+/–)) 8...Nf6 (8...Bb4 9.Bg7 Bd6 10.Qc1 Qh4 11.g3 Bg3 12.Kd1+/–) 9.a3 Bd6 10.d3 a5 11.de4 ab4?? (better is 11...de4 12.ba5 Ng4-/+) 12.e5+/– (worse is 12.ed5 ba3 13.Ba3 Ra5+=) 12...Ne4? (better is 12...Be7 13.ef6 Bf6+/–) 13.ed6+- Qh4 14.g3 Ng3 15.Nf3 Qh6 16.Rg1 Nf5 17.dc7 Nc6 18.Qd5 Be6 19.Qd2 Qd2 20.Kd2 Kd7 21.e4 (21.e4 Nfe7 22.ab4 Ra1 23.Ba1 Kc7 24.b5+-) 1–0. Yannick – Zemljanin, playchess.de, 2005.

5.e4 de4= 6.Bc4 e5 7.Ne6 Qd7 8.b5 (better 8.Nc3+-) 8...Be7? (better 8...Bf7 9.Qg4 Be6 10.Be6 Qb5+=) 9.Ng7+- Kd8 10.Ne6 (10.0-0!? Bd6 11.Nh5+-) 10...Kc8+- 11.Ng7 (better 11.Nc3 Nh6 12.d4 ed3 13.cd3+-) 11...Nh6?? (11...Kd8 12.0-0 Bd6 13.Ne6 Kc8+-) 12.Be6+- Qe6 (12...Rg8 13.Bd7 Nd7 14.Nh5+-) 13.Ne6 Nd7 (13...Bf7 14.Ng7+-) 14.0-0 (14.Ba3 Ba3 15.Na3 Bf7+-) 14...Nf5 (14...Bf7 15.Ng7 Rg8 16.Nh5+-) 15.Qg4 a6 (15...Bd6 16.Qh3+-) 16.b6 cb6 17.Nc3 Kb8 (17...Nh6 18.Qh4 Nf5 19.Qh3+-) 18.Nd5 Bd8 19.Nd8 Rd8 20.Nf6! Nf6 21.Be5 Ka7 22.Bf6 Rd2 23.Qf4 Re8 (23...Rd6 24.Be5 Nd4 25.Bd4 Rd4+-) 24.Qd2 e3 25.fe3 Ne3 26.Rfe1 Nc4 27.Qd7 Re1 28.Re1 Bc2 29.Re7 Na5 (29...Be4 30.Re4 a5 31.Rc4 h6 32.Rc7 Ka6 33.Rb7 h5 34.Ra7) 30.Qc7 Ba4 (30...Bf5 31.Bd4 h6 32.Bb6 Ka8 33.Re8 Bc8 34.Rc8) 31.Be5 Bc6 (31...b5 32.Qc8 Nc4 33.Qb7) 32.Qb8 1–0. DEFFM – GuestDDTN, freechess.org, 2019.

5.Ne6 Qd6 6.Nf8 Kf8 7.b5 Qb4 8.Ba3 Qb5 9.e3 (9.Nc3 Qd7 10.e3 Nc6=) 9...Qa4 (9...Qa5 10.Qc1=+) 10.Bd3 (10.c4!? Qd1 11.Kd1 dc4 12.Bc4=) 10...Bd3 (10...Nc6 11.0-0-/+) 11.cd3=+ Qd1 12.Kd1 Nc6 (12...c6 13.Nc3=+) 13.Nc3 Rd8 (13...d4 14.Nd5=) 14.Rb1= b6 15.d4 (15.Nb5 Rd7 16.Ke2 Nd8 17.Na7 Nh6=) 15...Nb8 (15...Ke8 16.Rc1=+) 16.Ke2 (16.Nb5 Rd7=) 16...c6=+ 17.Rhc1 Kf7 18.Bb4 (18.f4 Nh6=+) 18...Na6 19.a4 Nb4 20.Rb4 e6 21.a5 b5 22.Na2 Ne7 23.Rb2 Rd6 24.Nb4 The backward pawn on c6 becomes a target 24...e5 25.de5 fe5 26.Rbc2 Rc8 27.Rc5 e4 28.h4 Ke8 29.g3 Kd7 30.d3 ed3 31.Nd3 Re6 32.g4 (32.R5c2 Kc7-/+) 32...Ng6 (32...Re4 33.R5c2 Kd6 34.f3-+) 33.h5 (33.f4!? d4 34.Ne5 Ne5 35.fe5 de3 36.Ke3-/+) 33...Ne5-+ 34.Nf4 Rd6 35.f3? (35.Rd1-+) 35...Nc4 36.a6 (36.Rb1 Re8 37.Rb3 a6-+) 36...Re8 37.Ng2 (37.Kf2 Rf6 38.Nd5 cd5 39.Rb5 Kd6-+ (39...Re3?! 40.Rd5 Ke6 41.Rf5 Rf5 42.gf5 Kf5 43.Rc4=)) 37...Rde6 (37...Kc7 38.Rd1-+) 38.Kf2 (38.e4 Kd6 39.R5c4 bc4-+) 38...Kd6 39.R5c4 dc4 40.Nh4 (40.e4 Kc5-+) 40...Kc5 41.e4 (41.Nf5 g6 42.Ng7 Re3 43.Ne8 Re8-+) 41...Kb6 (41...Rd6!? 42.Nf5 Rd7 43.Ne3-+) 42.Nf5 Rf8 43.Ke3 g6 44.hg6 (44.Nd4 Rd6 45.hg6 hg6-+) 44...hg6 45.Nd4 Rd8 (better 45...Ree8-+) 46.Ne6+- Rd6 (46...Rd3 47.Ke2 Rd6 48.Nf8+-) 47.Nf4 Ka6 (47...g5 48.Nh3 Rd3 49.Ke2 Ka6 50.Ng5+-) 48.e5 Rd8 49.Ng6 Kb6 (49...Rg8 50.Nh4+-) 50.e6 a5 (50...Kc7+-) 51.e7 Re8 (51...Rc8 52.f4 Kb7+-) 52.f4 b4 53.Rc4 (53.f5 Rg8 54.f6 Rg6 55.e8Q Rh6 56.f7 Rf6 57.Qd8 Kb7 58.Qf6 c3 59.f8Q c2 60.Q6g7 Kb6 61.Qb8 Kc5 62.Qd4) 53...b3 54.Rc1 a4 55.Rb1 Kc5 (55...Ra8 56.Kd3 a3 57.Rb3 Kc7 58.Rb1+-) 56.Kd3 (better 56.f5 a3 57.Rb3+-) 56...Kb4 57.Ne5 c5 (57...Kb5 58.f5 Re7+-) 58.f5 c4 (58...a3 59.Nc6 Kb5 60.f6+-) 59.Kd4 a3 60.Nc4 (better 60.f6 a2 61.f7 ab1Q 62.Nc6 Kb5 63.fe8Q Qd3 64.Ke5+-) 60...a2= 61.Ra1 (61.Rh1!? Re7 62.Nb2=+) 61...Re7=+ 62.Ne5? (better 62.Nb2=+) 62...Re5!-+ 63.Ke5 b2 64.Ra2 b1Q 65.Re2 Qa1 66.Ke4 Kc5 (66...Qd1 67.Ke3-+) 67.Rc2 (67.Re3 Qf1-+) 67...Kd6 68.Rd2 Ke7 69.Re2 (69.Rd4-+) 69...Qd1 70.Kf3 (70.Ke3 Kf6 71.Rg2 Kg5-+) 70...Kf6 71.Kf2 (71.Ke3 Kg5 72.Rg2 Kh4-+) 71...Qd4 72.Kf3 Kg5 73.Re4 (73.Rf2 Qg4 74.Ke3 Qd1-+) 73...Qd3 74.Re3 Qf1 75.Ke4 Kg4 76.Kd4 Qf5 77.Re4 Kf3 78.Re3 Kf4 79.Rd3 Qd7 80.Kc3 Qc6 81.Kd4 Qb6 82.Kd5 (82.Kc4-+) 82...Qb5 83.Kd4 Qe5 (better 83...Qb4 84.Kd5 Qe4 85.Kd6 Qd3 86.Kc6 Qd4 87.Kb5 Ke5 88.Kc6 Qd5 89.Kb6 Kd6 90.Ka7 Kc6 91.Kb8 Qf7 92.Kc8 Qc7) 84.Kc4 Ke4 85.Rd1 Qc7 86.Kb3 (86.Kb5 Qc3 87.Rh1 Qf3-+) 86...Qb6 87.Kc3 Qc5 88.Kb3 (88.Kd2 Qd4 89.Kc2 Qc4 90.Kb2 Ke3-+) 88...Ke3 89.Rc1 (89.Rg1-+) 89...Qc1 90.Kb4 Kd4 91.Kb5 (91.Ka5 Qb2 92.Ka6 Kc5 93.Ka7 Kc6 94.Ka6 Qb6) 91...Qc5 92.Ka6 Qb4 93.Ka7 Kc5 (93...Kc5 94.Ka8 Kc6 95.Ka7 Qb7) 0–1. Bashinsky,Sergey – Komendatyan,Grant, Eaoaaneea Gnog, 2007.

5.a3 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Bf5 5.Nf3).

5.b5 (--> 1.b4 e5 2.Bb2 f6 3.b5 d5 4.e3 Bf5 5.Nf3).

5.Nc3 Bb4 6.Bd3 Bg4 7.Be2 Bf5 8.Nh4 Bg6 9.Bh5 Ne7 10.Nb5 c6 11.Nc3 Nd7 12.0-0 Qc7 13.e4 0-0-0 14.Bg6 Ng6 15.Ng6 hg6 16.Qg4 Rh6 17.ed5 Bd6 18.dc6 Qc6 19.Qa4 Kb8 20.Qc6 bc6 21.Ne4 Bc7 22.Rab1 Ka8 23.Ba3 Rdh8 24.h3 (time, 1–0). Nautiluschess – TabulaRasa, ICS blitz, 2001.

5.c4 Bb4 6.cd5 (6.Qb3!? Bd6 7.d4=) 6...Qd5-/+ 7.Nc3 (7.Qa4 Nc6=+) 7...Bc3 (7...Qd7 8.a3 Ba5 9.d4-/+) 8.Bc3 (8.dc3 Qd1 9.Rd1 Nc6-/+) 8...Nc6 (8...Bg4 9.Qa4 Qd7 10.Qb4 Bf3 11.gf3=+) 9.d3 (9.d4 ed4 10.Nd4 Nd4 11.Qd4 Qd4 12.Bd4 a6=+) 9...Qe6 (9...Rd8 10.d4-/+) 10.Be2 (10.d4 0-0-0-/+) 10...0-0-0 (10...Nge7 11.Nh4=+) 11.Qc2 Nh6 (11...Qd6 12.e4 Bg4 13.Rb1-/+) 12.0-0 e4 13.Nd4 (13.de4 Qe4 14.Qb3 Qc2=+) 13...Nd4 (13...ed3 14.Bd3 Bd3 15.Qd3=+ (15.Ne6? Bc2 16.Nd8 Rd8-+)) 14.Bd4 ed3 15.Bd3 Bd3 16.Qd3 Nf5 17.Rfe1 (better 17.Rab1=+) 17...c5 (better 17...Rhe8 18.Qc3 Nd4 19.ed4 Qd6 20.Re8 Re8=+) 18.Rac1?? (better 18.Rec1 Nd4 19.ed4+=) 18...Kb8-+ (18...Nd4 19.ed4 Rd4 20.Qa3+= (worse 20.Re6 Rd3 21.Rc5 Kd7-/+; 20.Rc5?! Kb8 21.Qg3 Ka8=)) 19.Rc5 Nd4 20.Rd1?? (20.Qb1 Rhe8 21.Rcc1-+) 20…Nf3! 1–0. DEFFM – mosinski, freechess.org, 2016.

5.c4 c6 6.Qb3 Be6 7.d4 e4 8.Nfd2 f5 9.Nc3 Nf6 10.b5 Nbd7 11.a4 Bd6 12.Be2 0-0 13.0-0 Kh8 14.c5 Bc7 15.f3 ef3 16.gf3 Nh5 17.f4 Nhf6 18.Ba3 Bg8 19.Nf3 Ng4 20.Nd1 Rf6 21.h3 Nh6 22.Nf2 Rg6 23.Kh2 Qb8 24.Nd3 Nf7 25.Rab1 Qe8 26.Nfe5 Nfe5 27.fe5 Ne5 28.Ne5 Be5 29.de5 Qe5 30.Rf4 d4 31.Qd3 Bd5 32.Rg1 de3 33.Qd4 Qc7 34.Bb2 Re8 35.b6 ab6 36.cb6 Qe7 37.h4 Rg1 38.Kg1 Rg8 39.Rf5+- Qe6 40.Rg5?? Qh3-+ 41.Qd5 cd5 42.h5 Qh4 43.Rg2 d4 44.a5 Qe4 45.h6 gh6 (45...gh6 46.Rg8 Kg8 47.Bd4 Qd4-+) 0–1. Abul,Q (1980) – Bodi,Ti (2005), FSFMB February, 2011.

5.Nh4 Be6 6.Bb5 Nd7 7.Bd7 (7.a3 a5=+) 7...Qd7-/+ (worse 7...Bd7 8.Qh5 Ke7 9.Ng6 hg6 10.Qh8+-) 8.a3 Nh6 9.d3 0-0-0 10.Nd2 g5 11.Nhf3 Be7 12.h3 (12.0-0 Nf7=+) 12...g4 (12...Nf7 13.c4-/+) 13.Ng1 (13.hg4 Ng4 14.Qe2 Kb8=+) 13...Rhg8 (13...gh3 14.Nh3 Rdg8-/+) 14.h4? (14.hg4 Ng4 15.Rh7=+) 14...f5?? Black prepares e4 (14...g3 15.Qf3-+) 15.g3?? (better 15.Be5!? Bd6 16.Bd4=) 15...e4 (15...Nf7!?-/+) 16.Ne2 Nf7 17.Nf4 Bd6 18.Ne2 ed3 (18...Kb8!?-/+) 19.cd3=+ Be5 20.d4 (20.Qc2 Bb2 21.Qb2 Rde8=) 20...Bh8 21.Nb3 b6 22.Qd3 Kb8 23.Nf4 Nd6 24.a4 Ne4 25.a5 Bf7 26.ab6 cb6 (worse 26...ab6 27.Nc5 Nc5 28.bc5+-) 27.Qa6 Rc8 28.0-0 Rc2 29.Rab1 Rgc8 30.Nd3 Bf6 31.Kg2? (31.Rbc1!? Qe7 32.Rc2 Rc2 33.Rc1=+) 31...Qb7 (31...Qc7!? 32.Ne5 Be5 33.de5 Nf2 34.Nd4 Nd1 35.Kh1 Nb2 36.Ra1-+) 32.Qa4 Be8 33.Qa3 Qc7 34.Nf4 Bb5 (better 34...Nf2 35.Na1 Nh3 36.Kh1 Qe7-+) 35.Nd5?? (35.Na1!? Bf1 36.Rf1-+) 35...Qb7 (35...Rf2 36.Kh1 Ng3 37.Kg1 Ne2 38.Kf2 Qg3) 36.Nf6-+ Nf6 37.Kg1 Bf1 38.Rf1 Ne4 39.b5 (39.d5 Qd5 40.Nd4 Rd2-+) 39...Ng3! 40.fg3 (40.fg3 Qg2 Mate attack) 40…Qg2 0–1. alessandrocarvalhaes (1835) – Otpolzator (1865), lichess.org, 2019.

4.a3 c6 5.Nh4 (5.e3 Ne4=) 5...Bg4 (5...Be4 6.f3 Bg6 7.Ng6 hg6 8.e3=) 6.h3= Bc8 7.e3 a5 8.b5 e6 9.Nf3 Nbd7 10.Be2 Bd6 11.0-0 e5 (11...cb5 12.Bb5 0-0 13.Nc3=) 12.c4 (12.d4 e4 13.Nfd2 0-0=+) 12...0-0 (12...dc4 13.bc6 bc6 14.Bc4=) 13.d4 (13.c5 Nc5 14.Be5 Bf5=) 13...e4 14.Nfd2 Bb8 15.Nc3 Qc7 16.g3 (16.f4 b6=) 16...Re8 (16...dc4 17.Bc4 Nb6 18.Be2 Bh3 19.Re1-/+) 17.cd5 cd5 18.Rc1 Qd6 19.Re1 (19.f4 Qe6 20.f5 Qd6-/+) 19...Nb6 (19...Qe6 20.Kg2=+) 20.Bf1 a4 21.Rc2 Be6 22.Qb1 Qd7 23.Kh2 h5 24.Rec1 h4 25.Bg2 Nh5 26.Ne2 Bd6 27.Nf1 Nc4-/+ 28.b6 Ra6 29.Qa2 Rb6 30.Rb1 hg3 31.fg3 Rb3 32.Rc3 Qb5 33.Rb3 ab3 34.Ba1 ba2 35.Rb5 Ra8 36.Nc3 Ra3 37.Rb7 Nf6 38.Nb5 Ra5 39.Nd6 Nd6 40.Rb3 Ra8 41.Nd2 Nh7 42.Rc3 Ng5 43.g4 Rc8 44.Kg3 Rc3 45.Bc3 Nb5 46.Ba1 Na3 47.Nb3 Nc2 48.Kf2 f5 49.Bc3? fg4 50.hg4 Bg4 51.Na1 Na1 0–1. REBEL7 – Genius 3, Fax–partij Nederland, 1995.

4.a4 e5 5.b5 (5.Be5 Nc6 6.c3+=) 5...d4 (5...e4!? 6.Nd4 Bg4+=) 6.Ne5+= c6 (6...Ne4 7.g4 Qf6 8.gf5 Qe5 9.Bg2+=) 7.e3+/– c5 (7...de3!? 8.fe3 Nfd7+/–) 8.Bc4+- Be6 9.ed4 Bc4 10.Nc4 cd4 11.0-0 Be7 (11...Qd5 12.Re1 Kd8 13.Ne5+-) 12.Qf3 0-0 (12...Qc7 13.Qd3+-) 13.Qb7 Nbd7 14.Bd4 Ne4?? (14...Nc5 15.Bc5 Bc5+-) 15.Qe4 1–0. Wall,Bill – Firewine, chess.com, 2010.

4.b5 a6 5.a4 (5.e3 e6=) 5...c6 (5...e6 6.e3+=) 6.e3= ab5 7.ab5 Ra1 8.Ba1 Qa5 9.Nc3 (9.Bc3 Qa4 10.Nd4 Bg6=) 9...c5 (9...Bc2 10.Qc1-/+) 10.Be2 (10.Bb2 e6=) 10...e6 (10...Bc2!? 11.Qc1 Bg6-/+) 11.0-0= Bd6 12.d3 Nbd7 13.Qd2 (13.e4 Bg6 14.ed5 ed5 15.Qe1+=) 13...0-0 (better is 13...Bg4!?=) 14.Nd5+/– Qb5 15.Nf6 gf6 16.e4 Bg6 17.Nh4 Ra8 18.f4 f5 (18...Ra2!? 19.Bc3 Qa4+=) 19.Qc3 f6 20.ef5 ef5 21.Bf3 Re8 22.g3 Kg7 23.Re1 Re1 24.Qe1 Nf8 25.Bd5 Qd7 26.c4 b5 27.cb5 Qb5 28.Qc3 Be7 29.Bc4 (29.Bb2 Qb6+/–) 29...Qb7 (29...Qb1!? 30.Kg2 Qb7 31.Kh3 Qb1=) 30.Qe1+/– Qd7 31.Qe2 Qa7 32.Bc3 Qd7 33.Nf3 Bh5 34.Qe3 Qb7 35.Nh4 Bg6 36.Kf2 Qd7 37.h3 Bh5?? (better is 37...Bd6+/–) 38.Nf5+- (38.Nf5 Kh8 39.Qe5 Qc6 40.Qe7 Qg2 41.Kg2 Bf3 42.Kf3 Ne6 43.Qf6 Kg8 44.Be6) 1–0. Sieber,M (2020) – Fuksik,J (2145), TCh–CZE Liga1 Vychod, 2012.

4.c3 e6=+ 5.Qb3 (5.Nh4 Bg4=+) 5...Nbd7 (5...Bd6 6.e3=+) 6.g3 (6.c4 a5-/+) 6...c5-/+ 7.Bg2 Bd6 8.d3 Qe7 (8...0-0 9.0-0=+) 9.0-0 0-0 10.b5 a6 (10...Rfd8 11.c4=+) 11.c4 ab5 (12.Qb5 Ra7=+). Behrmann,Klaus – Pappert,Thomas, compuserve, 1997.

4.Nc3 Nbd7 5.Nh4 Bg6 6.e3 e6 7.a3 Bh5 8.Be2 Be2 9.Qe2 a5 10.b5 (10.0-0 Bd6=) 10...Bd6 11.f4 a4 12.0-0 0-0 13.Nf3 c6 14.Rab1 Qe7 15.bc6 bc6 16.Nd4 Rfc8 17.g3 (17.h3!?=) 17...Nb6-/+ 18.Bc1 Nc4 Attacking the isolated pawn on a3 19.Ra1 Bc5 20.Nf3 Nd6 21.Kg2 Nf5 22.Bb2 Rcb8 23.Nd1 (23.Rfb1 Qd7+=) 23...Nd7 24.Ra2 Rb7 25.Nf2 Nd6 26.Nd3 Bb6 27.Nde5 Nb8 28.Ng5? (better is 28.Rb1!?+=) 28...f6-/+ 29.Qh5 fg5 30.fg5 Nd7 31.g6 Nf6 32.gh7 (better is 32.Qh3!? Qe8 33.Ng4-/+) 32...Nh7-+ 33.Nc6 Qg5 34.Qe2 (34.Qh3 Nf5-+) 34...Rc8 35.Nd4 Qg6 36.d3 Rbc7 (better is 36...e5 37.Nf3 e4-+) 37.Ba1? (better is 37.Bc1-+) 37...e5 38.Nf3 (38.Rb1 Bd4 (38...ed4?! 39.Rb6 de3 40.Be5-+) 39.ed4 e4-+) 38...Nf5 39.Ne5 Ne3 40.Qe3 (40.Kh1 Qd6 41.c4 Nf1 42.Qf1 Re8-+) 40...Rc2 (40...Be3 41.Ng6 Rc2 42.Rc2 Rc2 43.Kf3+=) 41.Rc2 (41.Qe2 Re2 42.Re2 Qh5-+) 41...Rc2 (41...Be3?? 42.Rc8 Qe8 43.Re8 Nf8 44.Rff8 Kh7 45.Rh8) 42.Rf2 (42.Qf2 Rf2 (42...Bf2?! 43.Ng6 Bc5 44.Kf3=) 43.Rf2 Qd6-+) 42...Be3 43.Rc2 (43.Ng6 Rf2 44.Kh3 Ra2-+) 43...Qf5 0–1. chandragupta (2150) – mikleol (2250), gameknot.com, 2015.

4.c4 c6 5.e3 (5.cd5 Nd5 6.a3 e6=) 5...Nbd7 (5...dc4 6.Bc4 e6 7.Qb3=+) 6.c5 (6.a3 e6=) 6...g6 (6...e6 7.a3=) 7.h3 (7.Be2 a5 8.a3 Bg7=) 7...Qc7 (7...Bg7 8.d3=) 8.g4 Bb1 9.Rb1 Bg7 10.g5 Nh5 11.Bg7 Ng7 12.d4 0-0 (12...e5 13.b5=) 13.h4 (13.Be2 e5=) 13...f5 14.Bd3 (14.b5 f4 15.Qd3 fe3 16.Qe3 e5 17.Ne5 Ne5 18.de5 Rae8=+) 14...e5 15.de5 Ne5 16.Ne5 (16.0-0 Nd3 17.Qd3 Ne6=) 16...Qe5=+ 17.Qc2 (17.Qd2 f4=+) 17...Rae8 (17...f4 18.Qb2 Qe6 19.Qe2-/+) 18.Qb2 Qe6 19.Rc1 (19.Qb3 f4 20.e4 Qe5=+ (20...de4?? 21.Bc4+-)) 19...f4 20.e4 Qg4 (20...de4?? 21.Bc4+-) 21.Kd2 (21.Qc3 Rf7-/+) 21...Qf3 22.ed5 Qf2 23.Kc3 Qb2 24.Kb2 cd5 25.a3 f3-+ 26.Rcf1 Re3 27.Kc2 Nh5 28.Rh2 Ng3 29.Rff2 Ne4 30.Be4 de4 31.Rh1 a5 32.b5 Rf5 33.c6 Rc5 34.Kd2 Rd3 35.Ke1 Rc1# 0–1. Thomas,ARB – Green,AY, York BCF–ch, 1959.

4.c4 e6 5.cd5 Nd5 6.b5 (6.a3 a5 7.b5 Be4=) 6...a6 (6...c6 7.Nd4=+) 7.a4 (7.ba6 A) 7...ba6? 8.e4+-; B) worse 7...Ra6 8.e4 Be4 9.Ba6 Bf3 10.Bb5 (worse 10.Qf3 Na6 11.0-0 Qg5+=) 10...c6 11.Qf3 (11.gf3?! cb5 12.Qe2 b4=) 11...cb5 12.Nc3+-; C) worse 7...Na6 8.e4+-; D) 7...Nb4 8.Nd4 N8a6 (worse 8...ba6 9.Nf5 ef5 10.a3+-) 9.Nf5 ef5=) 7...Bb4 (7...ab5!? 8.ab5 Ra1 9.Ba1 Nf6=+) 8.Bg7+= White launches an attack 8...Rg8 9.Bb2 f6 (9...ab5!? 10.ab5 Ra1 11.Ba1 c6+=) 10.Nd4+- ab5 (10...Be4 11.f3 Bb1 12.Rb1+-) 11.Nf5 ef5 12.ab5 Ra1 13.Ba1 Nd7 (13...f4 14.Qc2 Rg7 15.g3+-) 14.Qc2 b6 (14...Rg5+-) 15.Qf5 Qe7?? (15...Qa8 16.Qe4 Kd8 17.Qh7 Re8+-) 16.Qd5 Rg5 17.Qa8 Kf7 18.e3 Nc5 (18...Qe6 19.Nc3+-) 19.Bc4 Kg7 (19...Kg6 20.Nc3 Bc3 21.Bc3+-) 20.h4 Rg2 (20...Nd3 21.Bd3 Rc5+-) 21.Qg2 Kh8 22.Qg8 1–0. GuestGPPJ – GuestRYJS, freechess.org, 2020.

4.d3 Nbd7 5.g3 (5.Nh4 Bg6=) 5...e6 6.a3 c5 7.bc5 Bc5 8.Bg2? (better is 8.e3-/+) 8...Qb6-+ 9.Bf6 Bf2 (9...gf6?! 10.0-0+=; 9...Nf6?! 10.0-0-/+) 10.Kf1 Nf6 (10...gf6?! 11.Nbd2 Qe3 12.Rb1-/+) 11.Nbd2? (11.c4-+) 11...Ng4 12.Qb1 0-0 13.Qb6 Bb6 (worse is 13...ab6 14.h3 Bg3 15.hg4 Bg4 16.c4=) 14.Ra2?! (14.e4 Ne3 15.Ke2 de4 16.de4 Ng2 17.ef5 ef5 18.Nc4 Rfe8 19.Kd3 Rad8 20.Kc3-+) 14...Ne3 15.Kf2 Nc2 16.Kf1 Ne3 17.Kf2 Rac8 18.d4 Ng4 (worse is 18...Ng2 19.Kg2 Rc7 20.h3-+) 19.Kg1 Rc1 20.Bf1 Ne3 21.Kf2 Nd1 (21...Nf1?! 22.Rf1 Rc7 23.Nb3-+) 22.Kg2 Be4 23.Kh3 (23.h3-+) 23…Nf2 (23...Nf2 24.Kg2 Nh1 25.Kh1 Bf3 26.Nf3 Rf1 27.Kg2 Rc1-+) 0–1. Tanikut,Olga – Bronnikova,Elizaveta, RUS–ch U14 Girls, 1999. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Bf5)

4.Nd4 Nc6?? 5.Nf5+- e6 6.Ne3 (6.b5!? ef5 7.bc6 bc6+-) 6...Nb4 7.a3 Nc6 8.d4 a6 9.Nd2 Bd6 10.c4 Bf4 11.Nc2 (better 11.cd5!? ed5 12.Nf5 Bd2 13.Qd2 g6 14.Qe3 Ne4+-) 11...Bd2+- 12.Qd2 dc4 13.e3 0-0? (better 13...Ne4!? 14.Qe2 c3+-) 14.Bc4+- b5 15.Bd3 Qd5 16.0-0 a5 17.Rfe1 Qh5 (17...Ne4 18.Qe2+-) 18.e4 Ng4 (18...Rfb8 19.d5! Ne7 20.Bf6 gf6 21.Nd4+-) 19.h3 Nf6 20.Ne3 (20.d5 Ne7+-) 20...Rad8 21.Be2 (better 21.e5!? Nd7+-) 21...Qg6 22.f3 Rd7 (22...Nd4 23.Bd4 c5 24.Nd5 ed5 25.Bc5 de4 26.Qa5+-) 23.Rad1 (better 23.Bb5 Rd6 24.Nc4 Na7 25.Nd6 cd6+-) 23...Rfd8 (23...Nd4 24.Bd4 c5 25.Bb5 Rd4 26.Qa5 Rd1 27.Rd1+-) 24.Qc2 (better 24.Bb5 Nd4 25.Bd4 Rd4 26.Qa5 Rd1 27.Rd1+- (worse 27.Nd1 Qg3+-)) 24...Nh5 (24...Qg5 25.Qc6 Qe3 26.Kh1 b4+-) 25.Qc6 Nf4 (25...b4 26.ab4 ab4 27.Qc5+-) 26.Ng4 (better 26.Bb5!? Nh3 27.Kf1 Nf4+-) 26...h5 27.d5 (better 27.Ne3 b4 28.ab4 ab4 29.Bb5+-) 27...hg4 28.fg4 ed5 (28...Qe4 29.Bf1 Qg6 30.Qb5 Rd5 31.Rd5 ed5 32.Qa5 Ne6+-) 29.ed5 (better 29.Bb5 Qc6 30.Bc6 Rd6 31.ed5 Nd5 32.Bd5 Rd5 33.Re8 Re8 34.Rd5 Re2+-) 29...Nd5?? (better 29...Qc6 30.dc6 Ne2 31.Re2 Rd1 32.Kh2 Rb1-+) 30.Bd3 (better 30.Qg6 fg6 31.Bb5+-) 30...Qf6 (better 30...Qc6 31.Be4 Qc5 32.Kh1 Nc3 33.Rd7 Rd7-+) 31.Qf6 (better 31.Bf6 Nf6 32.g5+-) 31...Nf6 (31...gf6?? 32.Bb5 Rd6 33.Kf2+-) 32.Be2 Rd1 33.Bd1 Re8 (33...c5 34.Bf6 gf6 35.Kf2+-) 34.Re8 Ne8 35.Be5 (35.Bc3!? c5 36.Ba5 Nd6+-) 35…Nd6 0–1. alessandrocarvalhaes (1885) – genbi (1865), lichess.org, 2020.

4.Nd4 Qd7 5.Nf5 Qf5 6.e3 e5 7.b5 (7.c4 Be7= (< 7...Bb4 8.Qb3+=)) 7...Nbd7 (7...Bd6 8.c4=+) 8.d4 (8.c4 Bc5=) 8...ed4 (8...Bb4 9.c3 Bd6 10.c4=+) 9.Bd4= Ne4 (9...Ne5 10.Be2=) 10.f3 Nec5 (10...Nef6 11.Bd3 Qh5 12.0-0=) 11.Be2 (11.Nc3 0-0-0=) 11...Nb6 (11...Ne6 12.0-0=) 12.0-0 f6 (12...Qe6 13.Nd2=) 13.e4 (13.Nc3 0-0-0+=) 13...Qd7 (13...Qg6 14.a4 0-0-0 15.a5+=) 14.e5 (14.Nd2!?+=) 14...fe5= 15.Be5 Bd6 16.Qd4 (16.Bd4 Ne6 17.Nc3 Nd4 18.Qd4 Qe7-+) 16...Ne6 17.Qg4 (17.Qh4 Be5 18.Qh5 Qf7 19.Qe5 0-0=+) 17...0-0-/+ 18.Bd6 (18.Bg3 Bg3 19.Qg3 Nf4-+) 18...Qd6 (18...cd6?! 19.Re1=) 19.Rd1 (19.Bd3!?-/+) 19...Qe5-+ 20.Nc3?? (better is 20.Bd3 Qa1 21.Qe6 Kh8 22.Qh3 Qd4 23.Kh1-+) 20...Nf4 (20...Qc3?! 21.Qe6 Kh8 22.Bd3=) 21.g3 Ne2 (22.Ne2 Qe2-+; 21...Qc3?! 22.gf4 Qe3 23.Kf1 Rf4 24.Qg1-+) 0–1. Morais,Bruno – Salomone,Nestor, CC.2003.0.00067, 2003.

4.Nd4 Bd7 5.Nb3 =+.

4.Nd4 e6 5.Nf5 ef5 6.a3 Bd6 7.d3 0-0 8.Nd2 Nbd7 9.Nf3 c6 10.e3 Qc7 11.Be2 Be5 (11...f4 12.ef4 a5 13.0-0=) 12.d4 Bd6 13.c4 Rac8 (13...dc4!? 14.Bc4 f4=) 14.c5+= Rfd8? (better 14...Be7+=) 15.cd6+- Qd6 16.Qb3 Qc7 17.Bd3 a6?! (17...f4+-) 18.Bf5 b5 (18...Rb8 19.0-0+-) 19.0-0 Nb6 (19...Ra8 20.Rfc1+-) 20.Bc8 Rc8 21.Ne5 Nc4 22.Nc4 bc4 23.Qc2 h6 24.Qf5 Ne4 25.Rad1 Rb8 26.f3 Nd6 27.Qe5 (27.Qc2 Qe7 28.Rde1 f5+-) 27...a5 28.Bc3 (28.e4 ab4 29.ab4 Re8+-) 28...ab4 (28...Re8 29.Qf4 g5 30.Qg3 Re3 31.Be1+-) 29.Bb4 Ne8 30.Qc7 Nc7 31.Bd6 Rc8 32.Bc7 Rc7 33.Rb1 Kh7 34.Ra1 Ra7 35.a4 g5 (35...Ra5 36.Kf2+-) 36.a5 f5 37.a6 Kg6 38.Rfb1 Kf6 (38...f4 39.Rb7 Ra8 40.a7+-) 39.Rb6 f4 40.Rc6 Kf5 41.Rc5 (41.e4 de4 42.Ra5) 41...fe3+- 42.Rd5 Kf4 (42...Ke6 43.Re5 Kd6+-) 43.Kf1 (43.Raa5 Rf7 44.Re5 Ra7 45.Re4) 43...Re7 (43...e2 44.Kf2 e1Q 45.Re1 Ra6 46.Re4) 44.Ke2 g4 (44...Re5 45.Re5 c3 46.g3) 45.a7 (45.g3) 45...Ra7 (45...gf3 46.gf3 Rb7 47.a8Q Rb2 48.Ke1 Rh2 49.Rf5 Kf5 50.Ra5 Kf6 51.Qc6 Ke7 52.Ra7 Kd8 53.Qd7) 46.Ra7 (46.g3) 46...gf3 47.gf3 h5 (47...c3 48.Rf7) 48.Rf7 1–0. alessandrocarvalhaes (1785) – Aceves (1685), lichess.org, 2020.

4.g3 e6 5.a3 Nbd7 (--> 3.Nf3 e6 4.g3 Nf6 5.a3 Nbd7).

4.Ng5 e6 5.f3 Bb4-+ 6.e3 0-0 7.Be2 Nc6 8.f4 Qe7 9.h3 Rad8 10.g4 Be4 11.Bf3 Bf3 12.Qf3 d4 (12...h6 13.h4-+) 13.e4? (better 13.Bd4 Nd4 14.ed4-+) 13...e5 14.f5 Rfe8 (14...h6!? 15.h4-+) 15.h4 Qc5 16.Qb3 Rd7 17.a3 Ba5 18.Rg1?! (18.Qd3 Ng4 19.Ke2 h6-+) 18...Red8 (18...d3 19.Rg3 Ng4 20.Nh3-+) 19.Kd1 (19.Rg2 d3 20.c3 Qb6 21.Qb6 Bb6-+) 19...d3 20.c3 (20.Rg2 dc2 21.Qc2-+) 20…Qg1 0–1. alessandrocarvalhaes (1785) – BuntNaKorable (1750), lichess.org, 2019.

4.h3 h6 5.g4 (5.a3 e6= 6.e3 (6.Nd4 Bg6 7.e3 Nbd7 8.Be2 a5 9.b5 e5 10.Nf3 Bd6 11.0-0+=) 6...Nbd7 7.Be2 a5 8.b5 Bd6 9.Nd4 Be4 10.0-0 e5 11.d3=) 5...Bh7 (5...Be4 6.a3 (6.Nc3 Bf3 7.ef3 e6 8.a3 Bd6 9.h4 Nbd7 10.Qe2 a5 11.b5+=; 6.Bg2 e6 7.b5 a6 8.a4 Bd6 9.Nc3 Bf3 10.Bf3 Nbd7 11.ba6+=) 6...e6 7.e3 Bd6 8.Nc3 a5 9.b5 Nbd7 10.Ne4 de4 11.g5+=) 6.Bg2 (6.a3 e6 (6...a5+= 7.b5 e6 8.Bg2 Bd6 9.d3 Nbd7 10.Nbd2 e5 11.c4=) 7.Nc3 Nbd7 8.Bg2 e5 9.0-0 d4 10.Na2 c5 11.d3=) 6...e6 7.a3 Bd6 (7...c5 8.Bc3+= (8.b5 Bd6 9.d3 Qa5 10.Nbd2 Nbd7 11.c4+=) 8...Na6 9.bc5 Bc5 10.Be5 Rc8 11.c3+=) 8.d3 (8.Nc3 c6+= 9.0-0 e5 10.e3 Nbd7 11.d3+=) 8...Nbd7 (8...c5 9.bc5 Bc5 10.0-0= Nc6 11.Nbd2=) 9.Nbd2 (9.c4 a5 10.c5 Be7= 11.0-0=) 9...c5 (9...a5 10.b5= e5 11.c4=) 10.b5 (10.e4 de4 11.Ne4 Be4 12.de4 Qc7+= (worse is 12...Ne4 13.Ng1 Ndf6 14.Qd3+=)) 10...Qb6 (10...e5 11.a4+= –0.41 (11.0-0+=); 10...Qa5 11.c4+=) 11.a4 (11.c4 d4=) 11...a6 (11...Qa5 12.c4+=) 12.0-0 (12.c4 Qc7=) 12...0-0 (12...ab5 13.ab5 0-0 14.c4+=) 13.e4 (13.c4 ab5 14.ab5 Ra1 15.Qa1 d4=) 13...Bf4 (13...de4 14.Nc4 Qc7 15.de4 Ne4 16.Nd6 Nd6 17.Qe2-/+) 14.c4+= Bd2 (14...ab5!? 15.ab5 d4+=) 15.Nd2= d4 (15...ab5 16.ab5 Ra1 17.Qa1=) 16.f4 (16.a5 Qd6+=) 16...e5 (16...ab5 17.ab5 Ra1 18.Ba1=) 17.g5+= hg5 18.fg5 Ne8 19.Qg4 Qe6 (19...Qc7 20.a5=) 20.Qg3 (20.Qe6 fe6 21.Rf8 Kf8+=) 20...g6 (20...Nd6!?=) 21.h4+= Ng7 22.Bh3 f5?? (better is 22...Qd6+=) 23.gf6+- (23.gf6 Qd6 24.fg7 Rf1 25.Rf1+- (worse is 25.Nf1 Nf6+-)) 1–0. Mensch,E (2335) – Benedikt,Alexander, 10th Open, Bad Zwesten GER, 2006.

5.ba5 Ra5 6.Nc3 e5 7.e3 Nbd7 8.Be2 Be7 9.0-0 0-0 10.d4 e4 11.Nd2 b6 12.f3 Qa8 13.fe4 Be4 14.Nde4 de4 15.Qc1 Rd8 16.Nb1 Nf8 17.c4 Ne6 18.Nd2 Ra7 19.Qc3 h6 20.Bd1 Ng5 21.Bc2 c6 22.a4 Qb8 23.Rab1 Bd6 24.h4 Ng4 25.Rfe1 Bb4 26.Qb4 Qh2 27.Kf1 Qg3 28.Re2 Qh4 29.Qf8 Rf8 30.Nf3 0–1. GLChess210 – AnMon426, computer chess game, 2000.

5.b5 c6 6.bc6 (6.e3 Nbd7=) 6...bc6 (6...Nc6 7.e3+=) 7.Bf6 (7.Nc3 Nbd7 8.Nd4 Bg6+=) 7...gf6 8.e3 e5 9.d4 Qb6 10.Qc1 (10.Nc3 Qb2 11.Kd2 Nd7=) 10...Nd7+= 11.c4 a4 (11...Be7!?+=) 12.Nc3= Qa5 13.Be2 (13.Qd2!?=) 13...Rb8+= 14.0-0 Rb3 15.Nb1 Be7 (15...Rg8 16.Rd1+=) 16.c5 (16.cd5 cd5 17.de5 fe5 18.Qc8 Qd8+=) 16...Rg8-/+ 17.Bd1 Bg4 (17...Bd3 18.Bb3 Bf1 19.Kf1 ab3 20.Kg1=) 18.Kh1+= Bf3 19.gf3 Rb8 (19...ed4 20.Bb3 ab3 21.ed4+=) 20.Nc3+= Exerts pressure on the isolated pawn 20...f5 21.Ba4 Rg6 (21...Qc7!?+=) 22.Qc2+/– Ra8 23.Rab1 f4 24.Rb4 Qc7 25.Rfb1 Ra7 26.Rb6 Qc8 (26...Nb6?? 27.cb6 Qd7 28.ba7 Qa7 29.Qf5+-) 27.ef4 Ra4 28.Na4 (28.Qa4?? Nb6 29.Qc2 Qh3 30.Qg6 hg6 31.cb6 ed4-+) 28...Nb6 29.f5 (29.Nb6?? Qh3 30.Qg6 hg6-+; 29.cb6?? Qh3 30.Qg6 hg6-+; 29.Rb6?? Qh3 30.Rb8 Bd8 31.Qg6 fg6-+) 29...Nd7 30.fg6 fg6 (30...hg6 31.de5 Ne5 32.f4+-) 31.Nb6 Qa6 32.Nd7 Kd7 33.de5 Qa3 34.Kg2 Qc5 35.Qa4 (35.Qa4 d4 36.Re1+-) 1–0. gambit_queen (2115) – uberlebende (2155), gameknot.com, 2014.

5.b5 Nbd7 6.Nh4 Be6 7.e3 c5 8.Nf3 h6 9.c4 (9.Nc3 Bf5=) 9...dc4+= 10.Qc2 Nb6 11.Ne5 The pressure on c4 grows 11...g6 12.Nc4 (worse is 12.Bc4 Nc4 13.Nc4 Qd5-+) 12...Bg7 13.Nb6 Qb6 14.a4 0-0 15.Na3 Rfd8 16.Bc4 Nd5 17.Bg7 Kg7 18.0-0 Qd6 19.Rac1 Rac8 20.Qb2 Kg8 21.Rfd1 Nb6 22.Qb3 Nc4 23.Nc4 Bc4 24.Qc4 Qd3 25.Rc3 (25.Qh4 e5+=) 25...Qc4= 26.Rc4 Rd3 27.Rc3 Rd5 28.Kf1 Rcd8 29.Ke2 b6 30.f4 R5d6 31.d3 Kg7 32.g3 f6 33.Kd2 (33.h3 e6=) 33...g5 (33...e5 34.fe5 fe5 35.Ke2+=) 34.Kc2 Re6 35.Re1 gf4 36.gf4 Kf7 37.Rc4 Rg8 38.Kd2 f5 39.Rcc1 Rg2 40.Re2 Rg4 41.Rce1 h5 42.Kc3 h4 43.Rf1 h3 44.Rf3 Rg2 45.Rd2 Rh6 46.Rc2 Rh4 47.Rb2 Rg1 48.Re2 e6 49.Rd2 Kf6 50.Re2 Ra1 51.Kb3 Rb1 52.Kc3 Rg1 53.Rd2 Rh8 54.Kb3 Rh4 55.Rc2 Ke7 56.Kc3 Kd6 57.Re2 Ra1 58.Kb3 Rb1 59.Kc3 Rb4 60.Ra2 c4 61.dc4 Kc5 62.Kc2? (better is 62.Rg3!?=) 62...Rg4-/+ (worse is 62...Rc4 63.Kd3=; worse is 62...Kc4 63.Ra3+=) 63.Kc3 Rc4 64.Kb3 Rg1 65.Rd2 Ra1 66.Rd4 Raa4 67.Rc4 Rc4 68.Kb2 a4 69.Rh3 Kb5 70.Rh6 Kb4 (better is 70...Re4 71.Rh3 Kb4-+) 71.Re6-/+ a3 72.Kb1 b5 73.Re5 Ka4 0–1. Buczinski,Henryk (2200) – Kraft,Dieter (2380), VWC4pg26, 2011.

5.b5 e6 6.e3 Bd6 7.Be2 Nbd7 (7...Bg4 8.0-0=) 8.Nh4 Bg6 9.Ng6 (9.Nc3 Nb6=) 9...hg6 10.d3 (10.h3 Nb6=) 10...c6 11.bc6 (11.c4 cb5 12.cb5 Rh2 13.Rh2 Bh2=) 11...bc6+= 12.Nd2 Rb8 13.Rb1 Qe7 14.a4 (14.Qc1 Nc5=) 14...Nb6 15.Bc3 (15.c4 dc4 (15...Bh2? 16.Be5 Rb7 17.Rh2 Rh2 18.Bh2+-; worse is 15...Rh2 16.Rh2 Bh2 17.g3+=) 16.Bf3 cd3 (worse is 16...Rh2 17.Rh2 Bh2 18.Bc6 Kf8 19.dc4+/–) 17.Bc6 Kf8 18.Bf6 gf6+=) 15...Qa7 (15...Na4 16.Rb8 Bb8 17.Ba5+=) 16.Ra1= c5 (16...Bh2? 17.Nf1+-; worse is 16...Rh2 17.Rh2 Bh2 18.g3+=) 17.Nb3 Exerts pressure on the isolated pawn 17...0-0 (17...Qd7 18.Ba5 Na4 19.h3+=) 18.0-0 (18.Ba5 Rb7+/–) 18...Qc7 Black prepares the advance c4 (18...Qd7 19.Ba5 Na4 20.c4=) 19.h3 c4 (19...Qd7 20.Ba5 Na4 21.Ra2=) 20.Na5 cd3 21.Qd3 Ne4 (21...e5 22.Be1+=) 22.Bd4+/– Rfc8 23.Nb3 Nc4 24.Ra2 Ne5 25.Be5 Be5 26.Bf3 Nc3 27.Raa1 Rb4 Attacks the isolani on a4 28.a5 Ra8 (28...Nb5 29.Rac1=) 29.g3 (29.Ra3 Nb5 30.Ra2 Bh2 31.Kh1 Be5=) 29...Rc4 (29...Na4 30.Rac1=) 30.Nd2 (30.Rfc1 Ra6+=) 30...Rc6= 31.Nb3 g5 (31...Rc4 32.Rfc1+=) 32.Bg2+= Ra7 33.Rae1 (33.f4 Bf6=) 33...Na2= 34.e4 d4 (34...Nb4 35.Qb5 Rb7 36.Qe2=) 35.f4 (35.Ra1 Rc3 36.Qd2 Rc2+=) 35...gf4= 36.gf4 (36.Nd4? Rd6 37.Ne6 Re6 38.gf4 Bf4-+) 36...Rc3 37.Qb5 Bf4 38.Nd4 (38.Qa4 Rc2 39.Nd4 Rb2+=) 38...Ra8 (38...Ra5 39.Qe8 Kh7 40.e5 Re5 41.Re4 Be3 42.Kh1 Bd4 43.Rf7 (43.Rd4 Rc4 44.Rd7 Qc8 45.Qf7 Rg5+-) 43...Rh3 44.Bh3 Qf7 45.Qf7 Re4 46.Bf5 ef5 47.Qf5 (47.Qa2?! Kg6=) 47...Kh6 48.Qe4+-) 39.e5 Rb8 40.Qa4 (40.Qa6 Bg3 41.Re4 Qc5+=) 40...Rc4+= 41.Qa2 Rd4 42.a6 Qa7 43.Kh1 Rb6 (43...Bg3 44.Re3 Bf4 45.Re2+=) 44.c3+/– Ra6 45.Qb1 (45.Qa6 Qa6 46.cd4 g5+=) 45...Rb6 (45...Rda4 46.Qd3 Bh6+=) 46.Qc2 (46.Qb6 Qb6 47.cd4 Bd2= (47...Qd4? 48.Re4 Be5 49.Rd4 Bd4 50.Rd1+-)) 46...Ra4 (46...Qc7 47.Be4 Rd2 48.Qa4+/–) 47.Re4 Re4 48.Qe4 Bh6 (48...g5 49.c4=) 49.Qd4 (49.c4 Rb8=) 49...Qc7 50.Ra1 g6 51.Ra8 Kg7 52.Bf3 Rb1 53.Kg2 Rb2 54.Kh1 Qe7 (54...Rc2 55.Qd6 Qd6 56.ed6-/+) 55.Qd6 (55.c4 Rd2 56.Qe4 Qg5-/+) 55...Rb1-/+ 56.Kg2 Qg5 57.Bg4 Kh7 58.Qd8 Qd8 (58...Rb2!? 59.Kh1 Qc1 60.Bd1 Bg7 61.Qh4 Qh6 62.Qh6 Kh6-+) 59.Rd8-/+ Bf4 60.Rd7 Kg8 (worse is 60...Be5 61.Rf7 Kh6 62.c4+/– (worse is 62.Be6 Bc3 63.Kg3 Kg5=)) 61.c4 Kf8 (61...Be5 62.Be2-/+) 62.Be2 Be5 63.h4 (63.Ra7 Rb2 64.Kf1 Kg7-/+) 63...Ke8 64.Rd2 Ke7 (64...Rc1 65.Rd1 Rc3 66.Rh1-/+) 65.h5 (65.Rc2 Rb2 66.Rb2 Bb2-/+) 65...gh5 66.Bh5 f5 67.Be2 (67.Rc2 Bd4-/+) 67...Bd6 68.Ra2 (68.Bd3 Ra1-/+) 68...Bc5 69.Ra5 Bd4 70.Rb5 Rg1 71.Kf3 e5 72.Rd5 (72.Bd3 Kf6-+) 72...Ke6 73.Rd8 (73.Bd3 Re1 74.Be2 Kf6-+) 73...e4 74.Kf4 Be5 75.Ke3 Rg3 76.Kf2 (76.Kd2 f4-+) 76...f4 Black intends e3 77.Re8 Kf5 78.Rf8 Bf6 79.Bd1 (79.Bf1 Rc3-+) 79...e3 (79...e3 80.Ke2 Rg2 81.Ke1 Rf2-+) 0–1. Sternik,Ryszard (1830) – Velasco,Jose Maria (1800), FICGS, 2011. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Bf5 4.a3 a5)

5.Nc3 e6 6.b5 h6 (6...Bd6 7.e3=+) 7.e3 (7.d3 Bc5=) 7...Nbd7 (7...Bd6 8.Nh4 Bh7 9.Nf3=) 8.Bd3 (8.Nd4 Bg4 9.f3 Bh5=) 8...Bd3 9.cd3 Bd6 10.d4 0-0 (10...Rc8 11.d3=) 11.0-0 (11.d3 Rc8=) 11...c5 (11...c6 12.bc6 bc6 13.d3=) 12.bc6 bc6 13.Na4 (13.d3 Rb8 14.Rb1 c5=) 13...Nb6 (13...Qc7 14.Qc2=+) 14.d3= Na4 15.Qa4 Qb6 16.Bc3 (16.Rfb1 Rab8=) 16...Rfb8 17.Rfc1 Qa6 (17...Qb5 18.Qc2=) 18.Ne5= Attacks the backward pawn on c6 18...Be5 (18...Rb5 19.Ra2=) 19.de5 Nd7 20.d4 Nb6 21.Qd1 (21.Qc2 Nc4=) 21...Nc4 22.a4 Rb7 (22...Rb6 23.Rab1=) 23.Rab1 Rab8 24.h3 (24.e4 Rb1 25.Rb1 Rb1 26.Qb1 Na3=) 24...Rb6 25.Qe1 Qa7 26.Kh2 g6 (26...Rb1 27.Rb1 Rb1 28.Qb1=) 27.Kg3 (27.Rb6 Qb6 28.e4 c5=) 27...Kg7 (27...Qb7 28.Rb6 Qb6 29.Kh2=) 28.Kh2 (28.Rb6 Qb6 29.Kh2 c5=) 28...Qb7 (28...c5 29.Rb6 Qb6 30.dc5 Qc5 31.Kg1=) 29.Ra1 (29.Rb6 Qb6 (worse 29...Nb6 30.Ra1+-) 30.e4 Qd8=) 29...Qa6 (29...Qa8 30.e4=) 30.Kg3 (30.e4 Qa7=) 30...Rb3 31.Rab1 Qb7 (31...Rb1 32.Rb1 Rb1 33.Qb1=) 32.Rb3 Qb3 33.Ba5 Qa4 34.Bc3 (34.Bc7 Ra8=) 34...Rb7 (34...Qa3 35.Kh2=) 35.Kh2 Qa2 (35...Qa3 36.Ra1 Qe7 37.Ra8=) 36.Kg3 (36.Bb4 Nb2 37.Ra1 Qb3=) 36...Qb3 37.h4 (37.e4 Rb5=) 37...Rb8 (37...Qa3 38.Kh2=+) 38.Qe2 (38.Kh2 Qa3=) 38...Qa3=+ 39.Qc2 Rb3 (39...Qe7 40.e4=+) 40.Kg4 (40.h5 Rb5=) 40...Nb6 (40...Rb5 41.Kg3=+) 41.g3 (41.Kh3 Rb5=+) 41...Nd7 (41...Rb5 42.Kh3=+) 42.h5= g5 (42...Rb5 43.Kf3=) 43.Kf3 (43.Kh3 c5=) 43...c5 44.dc5 Nc5 45.Bd4 Ne4 46.Kg2 Qb4 47.g4 Ra3 (47...Nd2 48.Qc5=) 48.f3 Qd2 49.Qd2 Nd2 50.Rc2 Nc4 51.Kf2 Kg8 (51...Rb3 52.Ra2=) 52.f4 (52.Ke2 Ra4=) 52...Kg7 53.f5 Ra4 54.Ke2 (54.Kf3 ef5 55.gf5 Kg8+=) 54…Kh7 ½–½. marekt (2205) – objorn (2450), gameknot.com, 2016.

5.e3 a6 6.d3 e6 7.Be2 Bd6 8.0-0 0-0 (8...e5 9.c4 dc4 10.dc4=) 9.Nbd2 Be7 (9...e5 10.c4 e4 11.de4 de4 12.Nd4 Nd4 13.Bd4=) 10.Re1 Qd6 11.Rb1 b5 12.c4 (better is 12.Nh4!?+=) 12...bc4 13.Kh1? (13.Qc2!? cd3 14.Bd3 Bd3 15.Qd3+=) 13...a5 (13...cd3!? 14.Bf1-+) 14.b5 (better is 14.e4 cd3 15.ef5 de2 16.Qe2 ab4 17.ab4 Nb4 18.fe6 fe6 19.Ng5-/+) 14...Ne5?? (better is 14...Ng4 15.Kg1 cd3-+) 15.Ne5 (15.Be5 Qa3 16.Ra1 Ng4+-) 15...Bd3 (15...cd3 16.Bf1+-) 16.Bd3 (16.Nd3 cd3 17.Bd3 c6+-) 16...cd3 17.Nd3 Qb6 18.Nf3 (18.Qc2 Rac8+-) 18...Ne4 (18...c5 19.bc6! Qc6 20.Nd4+-) 19.Bd4 (19.Nd4 Rfe8+-) 19...Qb7 (19...Qd6 20.a4+-) 20.Nfe5 (20.Qa4 f6 21.Rec1 Rfd8+-) 20...Ba3 21.Qg4 (21.f3 Nd6+-) 21...Bd6 (better is 21...f5!? 22.Qe2 a4+-) 22.Nd7+- Rfd8?? (22...e5 23.Be5 Be5 24.N7e5 a4+-) 23.Qg7 1–0. overtoom – milot, gameknot.com, 2013.

5.e3= a6 6.Be2 =.

5.e3= Qd6 6.c4 (6.b5 Na5=) 6...0-0-0 7.d4 Ne4 (7...dc4!? 8.Bc4 e6=) 8.cd5 Qd5 9.Be2 (9.Qa4!?+/–) 9...e6= 10.0-0 (10.Nbd2 Nd2 11.Qd2 Bd6=) 10...Bg4 (10...Bd6 11.Qa4 a6 12.Rc1+/–) 11.Nc3 Nc3 12.Bc3 Bd6 13.Qa4 h5 (better is 13...Kb8!?+=) 14.b5+/– Ne7 15.Qa7 (15.h3 Bf5+/–) 15...Kd7 16.Qa4 b6 (16...Ra8 17.Qc2 Bf3 18.Bf3 Qb5+-) 17.Bb4+- Bb4 (17...Ra8 18.Qc2+-) 18.Qb4 h4?? (better is 18...Qd6 19.Qc3 Nd5+-) 19.Ne5 (19...Ke8 20.Ng4+-) 1–0. Wall,Bill – Kamoski, internet, 2003.

5.Nd4 Bg6 6.f4 (6.e3 e5 7.Nb3 Bd6+=) 6...e6 (6...e5!? 7.fe5 Ne5-/+) 7.e3+= Ne4 8.Nf3 h5 (8...c5 9.Be2+=) 9.Be2 f6 (9...a5!? 10.ba5 Ra5=) 10.d3 Nd6 11.Nh4 Bf7 12.0-0 Be7 13.Nd2 c6 14.c4 dc4 15.dc4 f5 (15...c5 16.Bc3+=) 16.Ndf3 (16.c5 Nb5 17.Nhf3 0-0+/–) 16...Nf6 (16...Ne4 17.g3= (17.Bg7? Rg8 18.Nf5 ef5-+)) 17.Ne5 g6? (17...Ng4 18.Nhg6 (18.Ng4? hg4 19.g3 Bh4-+; 18.Nf7?! Kf7 19.Nf3 Ne4+=) 18...Bg6 19.Ng6+/–) 18.Nef3?? (better is 18.Nhg6 Bg6 19.Ng6+-) 18...Rf8 (18...Nde4 19.Qc2 0-0 20.Rfd1+/–) 19.Ng5 (19.Ne5!? Ng4 20.Bg4 (20.Ng4?! hg4 21.g3 Ne4=; 20.Nhg6?! Bg6 21.Bg4 hg4 22.Ng6 Rg8+/–) 20...hg4 21.Nhg6 Bg6 22.Ng6+/–) 19...Ng4+= 20.Nf7 Rf7? (20...Kf7 21.Nf3 Ne4 22.Qc1+=) 21.Bg4 (better is 21.Ng6!? Bf6 22.Qb3 Bb2 23.Qb2+/–) 21...Bh4 (worse is 21...fg4 22.Ng6 Nc4 23.Bd4+/–; 21...hg4?! 22.Ng6 Nc4 A) worse is 23.Ne7 Qd1 (23...Nb2?! 24.Qb3 Qe7 25.Qb2=; 23...Qe7?! 24.Bd4+=; worse is 23...Re7 24.Bd4+=) 24.Rfd1 Nb2-/+ (24...Ke7?! 25.Bd4=; 24...Re7?! 25.Bd4=); B) 23.Qe2 Nb2 24.Ne7 Qe7 25.Qb2=) 22.Bf3 (better is 22.Be2 Ne4 23.Qc2=) 22...Bf6 (22...Nc4 23.Bd4 Bf6 24.Re1+=) 23.Qc2 (23.Bf6 Rf6 24.Qd4 Nf7+/–) 23...Qe7 (23...Bb2 24.Qb2 Nc4 25.Qh8 Ke7 26.Qc3=) 24.g3 (24.c5 Nb5+=) 24...Bg7 (better is 24...Bb2!? 25.Qb2 Nc4=) 25.c5 Nb5 26.a4 Nc7 27.e4 (27.Bg7 Rg7 28.b5 Nd5+/–) 27...0-0-0+= 28.Rfd1 Bb2 29.Qb2 Qe8 (29...fe4 30.Be4 Qf6 31.Rd8 Kd8 32.Qf6 Rf6 33.b5+=) 30.Rd6+/– Rfd7 (30...h4 31.Rad1 Rfd7 32.b5 (32.gh4?! fe4 33.Be4 Nd5+=) 32...cb5 33.ef5 ef5 A) 34.gh4?! Qe3 35.Qf2 Qf2 36.Kf2 Rd6 (36...ba4 37.Bb7 Kb8 38.Rd7 Rd7 39.Rd7 Kb7 40.Rd6+-) 37.cd6 Ne8=; B) 34.ab5 Rd6 35.Rd6 Rd6 (35...Qb5? 36.Bb7 Kb7 37.Qb5 Nb5 38.Rd8 hg3 39.hg3+-) 36.cd6 Nb5+=; C) 34.Bb7 Kb8 35.Bf3+-) 31.Rad1 (31.e5 Kb8+-) 31...Qe7 (31...fe4 32.Rd7 Rd7 33.Rd7 Kd7 34.Be4+/–) 32.e5 Ne8?? (better is 32...a6+/–) 33.b5+- Nd6 34.cd6 Rd6 35.ed6 Rd6 36.Qh8 (better is 36.Rc1 Qc7 37.bc6 bc6 38.Qh8 Rd8 39.Qf6 Qb6 40.Kf1+-) 36...Kc7 (36...Qd8 37.Qd8 Rd8 38.Rd8 Kd8 39.bc6 bc6 40.Bc6 Ke7+-) 37.Qe5 Kd7 (37...b6+-) 38.bc6 bc6 39.Bc6 Kc6 40.Qb5 1–0. Bulcourf,C (1980) – Adorno,Anibal, VI Copa Latina, 2015.

5.Nh4 Bg4 6.h3 Bh5 7.g4 Bg6 8.Bg2 Nb6 (8...e6 9.d3=) 9.d3 c6 10.Nd2 Qb8 (10...e6 11.c4+=) 11.c4 e5 12.e4 White gets the initiative 12...Be7 (12...de4!? 13.de4 Be7+=) 13.ed5+/– cd5 14.c5 Nbd7 15.Qb3 a5 (15...Qc7 16.Ng6 fg6 17.Bd5 Nd5 18.Qd5+/–) 16.g5 a4 17.Qa2 Bd3? (better is 17...Nh5 18.Ng6 fg6 19.Bd5 Nf4+/–) 18.gf6+- Nf6 19.Bd5 0-0 (19...Nd5 20.Qd5 Bh4 21.Qd3+-) 20.Bc4 Bc4 21.Nc4 Nd7 (21...Qc7 22.Nf5 Rae8 23.Rg1+- (23.Be5?! Bc5 24.f4 Qc6+-; 23.Ne5?! Bc5 24.bc5 Re5 25.Be5 Qe5 26.Ne3 Nd5+-)) 22.Nf5 Bg5 (22...Qe8 23.Rg1 (23.Be5?! Ne5 24.0-0-0 Nc4 25.Qc4 Rd8+=) 23...g6 24.0-0-0+- (24.Ne5?! Ne5 25.0-0-0 Bf6+-; 24.Be5?! Ne5 25.0-0-0 Nc4 26.Qc4 Kh8+=)) 23.Rg1 Qd8 (23...h6 24.Ncd6 g6 25.h4 gf5 26.hg5+-) 24.Rd1 (24.Be5?! Ne5 25.Ne5 Qf6+=) 24...Qf6 (24...g6 25.Nb6! Qf6 26.Rd7 Qf5 27.Rg5 Qg5 28.Na8+-) 25.Qb1 Nc5 26.h4! Nd3 (26...Bh4 27.bc5) 27.Qd3 Bh6 28.Be5 Rfe8 29.Kf1 Re5 30.Ne5 Qe5 31.Nh6 Kf8 32.Qh7 gh6 33.Qh6 Ke7 34.Re1 Qe1 35.Ke1 Rc8 36.Qg5 f6 37.Qg7 Ke6 38.Rg6 Rc1 (38...Kd5 39.Qb7 Rc6 40.Qb5 Ke6 41.Qc6 Kf5 42.Rf6 Kg4 43.Qg2 Kh4 44.Rh6) 39.Kd2 Rd1 (39...Rc2 40.Kc2 Kd5 41.Qf6 Ke4 42.Qe6 Kd4 43.Rg4) 40.Kd1 Kd5 41.Qf6 Kc4 (41...b5 42.Qf5 Kc4 43.Kc2 Kd4 44.Rg4) 42.Rg4 Kb3 (42...Kb5 43.Qe6 b6 44.Qc4) 43.Kc1 Ka3 44.Qb2 1–0. lucya (2135) – Pincopallino, GameColony.com, 2002.

5.Nh4 Bg6 6.Ng6 hg6 7.g3 (7.e3 e6=) 7...e5=+ 8.Bg2 Qe7 (8...c6 9.h3=+) 9.c4= 0-0-0 (9...a5!?=) 10.cd5+= (10.Bd5?! Nb6=) 10...Nb6 11.e4 Nc4 12.Bc1 Nd6 (12...Nb6 13.Nc3+-) 13.Nc3 Qd7 (13...Re8 14.Qa4 Kb8 15.d3+-) 14.d4 Qg4?? (better 14...Qe8+-) 15.Bf3+- Qd7 (15...Qh3 16.de5 Nde4 17.Ne4 Rd5+-) 16.de5 Nde4 (16...Be7 17.Qd4 Nfe4 A) 18.ed6 Bf6 19.Qa7 Bc3 20.Kf1 Qh3 21.Bg2 Qf5 22.Qa8 Kd7 23.Qa4 Kd6 24.Bf4 Ke7+- (24...Kd5 25.Qb3 Kd4 26.Be4 Qe4 27.Rd1 Qd3 28.Rd3 Kd3 29.Kg2 Rh2 30.Rh2 Ke4 31.Qc4 Kf5 32.g4 Kf6 33.Qc3 Ke6 34.Qe5 Kd7 35.Qc7 Ke6 36.Qe5 Kd7 37.Qd6 Ke8 38.Rh8); B) 18.Ne4+-) 17.Ne4 (17.ef6?! Nc3 18.Qd4 Nb5+=) 17...Ne4 (17...Qd5 18.ef6 Qd1 19.Bd1 gf6 20.Nf6+-) 18.Bg4 Qg4 (18...f5 19.ef6! Nf6 20.Bd7 Rd7+-) 19.Qg4 (19.Qg4 f5 20.ef6 Kb8 21.Qe4 gf6 22.Qg6+-) 1–0. Pierre – The_Winner, internet, 2020.

5.d3 Be7 6.Nbd2 h6 (6...0-0 7.c4+=) 7.h3 (7.e4 Bg4=) 7...c5 (7...0-0 8.g4 Bg6 9.Ne5=) 8.bc5 (8.e4 Bg6 9.bc5 Bc5=) 8...Bc5 9.e3 Nc6 10.g4 Bg6 11.Nb3 Bb6 12.Bg2 Rc8 13.0-0 Qc7 (13...0-0 14.Rb1+=) 14.Rc1= a5 (14...0-0 15.Nh4=) 15.Nbd4 (15.c4 dc4 16.Rc4 Qd8+=) 15...Nd4= 16.Nd4 Qd7 17.f4 Ba7 (17...a4 18.f5 ef5 19.gf5=) 18.Qe2 Qa4 (better is 18...Qe7!?+=) 19.f5+/– Bd4 (19...ef5!? 20.Nf5 Bf5 21.Rf5 Rc7+-) 20.Bd4 (better is 20.ed4!? Bh7 21.fe6+-) 20...ef5 1–0. Barrios,Felipe (1980) – Acosta,Jaime (1620), 4th IRT FIDE Open Clasico de la Sabana, 2016.

5.d4 Bd6 6.e3 0-0 7.c4 dc4 8.Bc4 a5 9.b5= Nbd7 10.0-0 Qe7 11.Nbd2 Rfd8 12.h3 Nb6 13.Be2 h6 14.Ne1 e5 (14...Qd7 15.Nef3=+) 15.a4 (15.de5 Be5 16.Be5 Qe5=) 15...ed4 16.Bd4 Nbd5 17.Bd3 Bd3 18.Nd3 Nb4 19.Nb4 Bb4 20.Rc1 Rac8 21.Nb3 c5 22.bc6 bc6 23.Qf3 Ne4 24.Qg4 Nf6 25.Qf3 Ne4 26.Qg4 ½-½. Herzig,Philip - Haase,Pavel (2115), Golden Prague Open, 2021.

5.d4 Bd6 6.e3 Nbd7 7.c4= c6 8.Nbd2 0-0 9.Be2 Ne4 10.0-0 Qf6 11.g3 (11.Ne4 Be4 12.Nd2 Bf5=) 11...Nd2+= 12.Nd2 Qg6 13.c5 Bc7 14.Nf3 Bh3 15.Re1 Nf6 16.Ne5 Qh6 17.Ng4 Ng4 18.Bg4 Bg4 19.Qg4 f5 20.Qe2 Rf6 21.Bc3 Qh3 22.f4 g5 23.Bd2 Kh8 (23...Rg6 24.b5=) 24.b5+= Rg8 25.Qg2 Qh5 26.bc6 bc6 27.Rab1 Rf7 28.Qf1 Rfg7 29.Rb3 Bd8 30.Kg2 (30.Qa6 Rg6+=) 30...Bf6 31.Ba5 (31.Bc3 Rg6 32.Qe2 Qh6+=) 31...h6 (31...gf4 32.Qf4 Rg6 33.Qf3 Qf3 34.Kf3=) 32.a4 Kh7 33.Qd3 Qg6 34.Qa6 Qe8 35.Qe2 (35.fg5 Bg5 36.Reb1 e5=) 35...h5 36.Rb8 Qg6 37.Rg8 Kg8 38.Qa6 Qe8 39.Qd3 (39.fg5 Bg5 40.Kh1 h4 41.gh4 Qh5+=) 39...h4 40.Rb1 hg3 41.hg3 (41.Kg3?? gf4 42.Kf2 Qh5-+) 41...Qh5 42.Rb8 Kh7 43.Rb1 Qg4 44.Qd1 (44.Rh1 Kg8 45.Rh6 Rb7=) 44...Qd1 (44...gf4!? 45.Qg4 Rg4 (worse is 45...fg4 46.gf4 Kg6 47.Rb8+=) 46.Rb7 Kh6 47.ef4 Bd4 48.Ra7 e5 (worse is 48...Bc5 49.Ra6+=) 49.fe5 Be5+=) 45.Rd1+= Rb7 46.Kf2 Rb2 47.Rd2 Rb1 48.Ke2 Kg6 49.Rd1 Rb7 50.Bc3 Rb3 51.Kd2 Ra3 52.Ra1 Ra1 53.Ba1 Bd8 54.Bc3 Kh5 ½–½. Winiger,Albert (2340) – Mehlhorn,Uwe (2440), RSX8D – priv – XMAS, 2004.

5.d4 Bd6 6.e3 Qe7 7.Nbd2+=.

5.Nd4 Bg6 6.e3 Nbd7 7.Be2 c5 8.bc5 Bc5 9.0-0 0-0 10.Nb3 Bd6 11.f4 Qc7 12.Nc3 a6 13.a4 b6 14.Nd4 Bc5 15.f5 Bd4 16.fg6 Be5 17.gh7 Nh7 18.h3 Bg3 19.Rb1 Nhf6 20.Rf3 Rfe8 21.Qc1 Bh2 22.Kh1 Nc5 23.Qd1 Rec8 24.Qe1 (better is 24.g3!? Bg3 25.Qg1=) 24...Nfe4-/+ 25.a5 b5 26.Qh4 f5 27.d4? (better is 27.Qe1!?-/+) 27...Nc3 28.Bc3 Ne4 29.Bb4 Bg3 30.Qe7 Qe7 31.Be7 Rc2 32.Bd3 Nf2 33.Kg1 Nd3 34.Rg3 Kf7 35.Bd6 Rd8 36.Bb4 Rdc8 37.Rf3 Ra2 38.g4 Nb4 39.Rb4 Rc1 40.Rf1 Rcc2 41.Rf3 Kf6 42.Rb1 g5 43.Rd1 Rab2 (< 43...Ra5 44.gf5 ef5 45.Rdf1-+) 44.Kf1 Kg6 45.Ra1 b4 46.gf5 ef5 47.Rg3 b3 48.Re1 (48.Rd1 Rd2 49.Rc1 Rbc2-+) 48...Kh5 49.Rf3 (49.e4 de4 50.Kg1 Kh4 51.Rg5 Kg5 52.h4 Kg4 53.d5 Rg2 54.Kh1 Kh3 55.Re3 Rg3 56.Rg3 Kg3 57.h5 Rb1#) 49...Rh2 50.Kg1 Rbg2 51.Kf1 Rc2 52.Kg1 g4 53.Rf4 (53.hg4 Kg4 54.Rf5 Kf5 55.e4 Kg4 56.Rb1 Rcg2 57.Kf1 b2 58.Rd1 Rd2 59.Kg1 Rd1 60.Kh2 Rd2 61.Kg1 b1Q#) 53...Rcg2 0–1. kamret (2240) – AdvancedSoloution (2260), GameColony.com, 2003.

5.Nd4 Bg6 6.e3 Nbd7 7.Be2 Bd6 8.f4 c6 9.0-0 h6 10.Nc3 0-0 11.f5 ef5 12.Nf5 Bf5 13.Rf5 Qc7 14.h3 Rfe8 15.b5 (15.Rb1 Be5=+) 15...Nf8 (15...Be5 16.bc6 bc6 17.Na4=+) 16.Qf1 (16.Rb1 Qe7=) 16...Ng6 17.Ra2 Re6 18.bc6 (18.Qd1 Rae8=+) 18...bc6=+ 19.Ba6? (19.Qe1 Rb8=+) 19...Rae8 (19...Nh4!?-+) 20.Qd3=+ Bg3 21.Ne2 Be5 (21...Ne4 22.a4=+) 22.Nd4= R6e7 23.Rf1 Ne4 24.Nf5 Bh2 (24...Re6 25.Qe2=+) 25.Kh1= Ng3 26.Kh2 Nf5 27.Kg1 Ng3 28.Rb1 Ne5 (28...Ne4 29.Qd4 f6 30.Bc3=) 29.Be5= Qe5 (< 29...Re5 30.Rb7 Qd6 31.Ra7+=) 30.Rab2 Ne4 31.c3 Qf6 32.Qf1 Qg5 33.Qf3 Re6 34.Qe2 Rf6 35.Rb8 Rb8 36.Rb8 Kh7 37.Bd3 g6 38.Be4 de4 39.Rb7 Qf5 (39...a5 40.Qc4 Qf5 41.Kh2=) 40.Ra7+= Kg7 41.Rb7 Qe5 42.a4 Qa5 43.Rb4 c5 (better is 43...Qf5!?+/–) 44.Re4+- Qb6 45.Rf4 Rd6 46.d4 cd4 47.ed4 Rc6 (47...Re6 48.Qf2 f5+-) 48.Qe5 (48...Kf8 49.Qh8 Ke7 50.Re4 Re6 51.Re6 Qe6 52.Qe5+- (52.Qh6?! Qe1 53.Kh2 Qc3+-)) 1–0. marekt (2195) – kfj (1900), ICC, 2003.

5.Bf6 Qf6=+ 6.Nc3 a5 7.e3 c6 8.Nd4 (8.b5 Bd6=+) 8...Bg6 (8...ab4 9.ab4 Ra1 10.Qa1 Bb4 11.Qb2 Bc3 12.Qc3-/+) 9.ba5=+ Ra5 10.Qb1 Qe7 (10...Ra3!? 11.Ra3 Ba3 12.Qb7 0-0 13.Nc6 Nc6 14.Qc6 Bc2-/+) 11.Qb6= Ra8 (worse 11...Ra3 12.Ra3 Qa3 13.Qb7+-) 12.f4 Qd7 (worse 12...Ra3 13.Ra3 Qa3 14.Qb7+-) 13.Rb1 Ba3 (13...Ra3 14.Ncb5! (14.Qb7?! Qb7 15.Rb7 Ra8=) 14...Ra2 15.Nc7 Kd8 16.Nd5 Kc8 17.Qb3 ed5 18.Qa2+-) 14.Qb7 Qb7 15.Rb7 0-0 16.Bd3 Bd6 (16...c5 17.Nf3=) 17.Kf2 (17.Bg6 Ra1 18.Nd1 hg6+=) 17...Bd3 18.cd3 ½–½. Pierre – Guest589, internet, 2020.

5.h3 h6 6.d3 Bd6 7.Nbd2 Nbd7 8.e3 0-0 9.g4 Bg6 10.Qe2 c5 11.Bg2 cb4 12.ab4 Bb4 13.c3 Bd6 14.0-0 Nc5 15.Ne1 e5 16.f4 ef4 17.ef4 Re8 18.Qf3 Qb6 19.Rb1 Nd3 20.Kh1 Ne1 21.Rbe1 Qb2 22.Re7 Re7 (22...Re7) 0–1. Amun (1865) – Gabriel_Simoes (1825), lichess.org, 2019.

5.Nh4 c5 6.Nf5+= ef5 7.c3 (7.bc5 Bc5 8.e3 Qb6 9.Bf6 Qf6+=) 7...Be7 (7...Nbd7 8.e3=) 8.d4 (8.e3 Nc6=) 8...c4 9.g3 0-0 10.Bh3 Ng4 (10...Qd7 11.Qc2=) 11.Qc2 Qd7 12.f3 Nh6 13.Bc1 Qe6 14.e4 de4 15.fe4 Ng4 (15...a5!? 16.b5 Rd8+/–) 16.Qe2+/– White prepares e5 16...h5 17.e5 Nd7 (17...a5!? 18.Bg2 ab4+/–) 18.Bg2+- Rab8 19.h3 Nh6 (19...Nge5 20.de5 Ne5 21.0-0+- (21.Qh5 Ng4 22.Kd1 g6 23.hg4 Qd6 24.Bd2 gh5 25.gh5 Qg3-+)) 20.Qh5 Nf6 21.Qf3 Ne4 22.0-0 Qg6 23.Kh2 (23.Bh6 Qh6 24.Kh2 g6+-) 23...Bg5 24.Bg5 Ng5 25.Qe2 b5 26.a4 a6 27.ab5 ab5 28.Nd2 Qb6 (28...Rfe8 29.Ra5+-) 29.Rfe1 Rfe8 30.Nf1 (30.Qh5 Ne6+-) 30...f6 31.e6! f4 (31...Qe6 32.Qe6 Pinning; 31...Re6 32.Bd5 Pinning (32.Bd5 Decoy); 31...Ne6 32.Bd5 Pinning (32.Bd5 Decoy)) 32.d5 Nf5 (better is 32...fg3 33.Ng3 Rbd8+-) 33.gf4 Qd6 34.Qf2 Nh7 35.Ng3 Ng3 36.Qg3 Rbd8 (36...f5+-) 37.f5 Qb6 38.e7 Rd6 39.h4 Qb8 (39...g5 40.fg6 Ng5 41.Ra5+-) 40.Re6 Rb6 41.Rb6 Qb6 42.d6 1–0. arkadeles (2300) – Kasker (2030), ChessWorld.net, 2003.

5.Nh4 Bd6 6.Nf5= ef5 7.c4 dc4 8.Qc2 0-0 9.Qf5 Nbd7 10.e3 b5 (better is 10...Re8!?+=) 11.Qb5+/– c5 12.Qc4 Ne5 13.Qb3 cb4 14.ab4 Rb8 (14...Qe7 15.b5+-) 15.b5 Ne4 16.Nc3 (16.Ra7 Qh4 17.Be5 Qf2 18.Kd1 Be5+=) 16...Nf2? (16...Nc3 17.Bc3 Qe7+-) 17.Kf2 Qh4 18.Ke2 Qg4 19.Ke1 Be7 (19...Rb7 20.Qa4+-) 20.Be2 (20.Ra7?! Bh4 21.g3 Bg3 22.hg3 Qg3 23.Kd1 Qf3 24.Kc2 Qh1+/–) 20...Qg2 21.Rf1 Rbd8 22.d4 Bg5 23.Nd1 Bh4 24.Kd2 Ng4 25.Ra7 Nf6 26.Rf6! Bf6 27.Ba3 Rfe8 28.Qf7 Kh8 29.Rd7 Qa8 30.Bc5 Qa5 31.Nc3 Rc8 32.Ra7 Qd8 33.Nd5 1–0. Weglarz,L (2300) – Janos,I (2155), Tatry Open, Tatranske Zruby SVK, 2008. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Bf5 4.a3 e6)

5.Nh4 Bg4 6.h3 Bh5 7.g4 Bg6 8.Ng6 hg6 9.Bg2 c5 10.c4 cb4 11.ab4 Bb4 12.g5 (12.Nc3 Nc6 13.cd5 Bc3 14.Bc3 ed5+=) 12...Ne4 13.cd5 ed5 (worse 13...Qd5 14.Qc2 Rh4 15.Qc8 Qd8 16.Qb7 Nd2 17.Nc3+- (17.Qa8?? Nf3 18.Kf1 Qd1)) 14.Qb3 (14.Be4 de4 15.Qb3 Qd6 16.Bg7 Rh4=) 14...Nc6 (14...Qb6 15.Be4 de4 16.Bg7=) 15.Be4 de4 16.Bg7 Rh5 (16...Rh4 17.Bf6 Qd6 18.Qg3 Qg3 19.fg3=) 17.Bf6 Qd7 18.Nc3 Bc3 (18...Rh3 19.0-0-0=) 19.dc3 (19.Qc3 Kf8=) 19...Kf8 20.Rd1 Qc7 21.Qa3 Kg8 22.Qd6 Qc8 23.Qf4 (23.Qd7 a5=) 23...Qe6 24.Rd6 Qc4 (24...Qe8 25.h4=) 25.h4 (25.Rd7 b6+=) 25...a5= 26.0-0 Qe2 27.Rb1 Re8 28.Rd7 (28.Rb7 e3 29.Bd4 Ne7=) 28...e3 (better 28...a4!?=) 29.fe3+= Re3 (29...Qe3? 30.Qe3 Re3 31.Rbb7 Re1 32.Kg2+-) 30.Bd4 Re7 (30...Nd4?? 31.Qf7 Kh8 32.Qf8) 31.Re7 (31.Rbb7?! Rd7 32.Rd7 Qe8=; worse 31.Rdb7 Nd4 32.Rb8 Kh7 33.cd4 Qe6=) 31...Qe7 (31...Ne7?? 32.Qb8 Nc8 33.Qc8 Qe8 34.Qe8 Kh7 35.Qf7) 32.Qf6 Qf8 33.Rb7 Nd4 34.Qd4 (34.cd4?! Rh4 35.Qe5 Qg7 36.Qe8 Qf8=) 34...Rh8 (34...a4 35.Rd7 (35.Qa4?! Qc5 36.Kf1 Qf5 37.Ke2 Qe5 38.Kf3 Qf5 39.Kg3 Qe5 40.Qf4 Qf4 41.Kf4 Rh4 42.Ke5 Rc4=) 35...Qg7 36.Qe4+-) 35.Rd7 Qg7 36.Qf2 (36.Qe4 a4+-) 36...Qf8 (36...a4 37.Ra7+-) 37.Qb6 Qg7 (37...Rh4?? 38.Rd8 a4 39.Kf2+-) 38.Qa5 Rh4 39.Qc7 Rg4 (39...Rh3 40.Qb8 Kh7 41.Kf2+-) 40.Kf2 (40.Kf1 Rh4+-) 40...Rh4 41.Ke3 Rh3? (better 41...Rh1+-) 42.Kd2+- (42.Kd2 Rh1 43.Kc2+-) 1–0. objorn (2425) – marekt (2170), gameknot.com, 2017.

5.Nh4 Bg4 6.h3 Bh5 7.g4 Bg6 8.Ng6 hg6 9.Bg2 Nbd7 10.d3 c5=+ 11.c3 Bd6 12.Nd2 0-0 13.Nb3 Rc8 (13...Qc7 14.Rc1=+) 14.bc5 (14.0-0 c4 15.dc4 Rc4=+) 14...Nc5 15.Nc5 Rc5 16.0-0 (16.Rb1 Qa5 17.0-0 b5=+) 16...Qc7 (16...g5 17.Bc1=+) 17.Qd2 (17.Rb1 b6-/+) 17...Rc8 (17...Be5 18.Rab1=+) 18.Rfc1 (18.a4 Be5 (worse 18...Rc3 19.Bc3 Qc3 20.Qc3 Rc3 21.Rfc1+-) 19.d4 Bh2 20.Kh1 Rc6-/+) 18...Be5 19.c4 (19.Rab1 b6 20.d4 Bh2 21.Kh1 Rc4-/+) 19...Bb2 (worse 19...dc4 20.Rc4 Rc4 21.dc4 Bb2 22.Qb2=+) 20.Qb2 b5 21.Rcb1 (21.Rab1!?-/+) 21...bc4-+ 22.dc4 (22.Qc3 cd3 23.Qd3 Rc2-+) 22...Rc4 23.Qb7?? (better 23.Qd2-+) 23...Rc1!! 24.Bf1 (24.Rc1 Qc1 Double attack (24...Qb7 Deflection)) 24…Qb7 (24...Qb7 25.Rc1 Ne4-+) 0–1. thebutz (1870) – marekt (2135), gameknot.com, 2017.

5.Nh4 Bg4 6.h3 Bh5 7.g4 Bg6 8.Ng6 hg6 9.Bg2 Nbd7 10.e3 c5 11.b5 (11.bc5 Bc5 12.Nc3 Nb6=) 11...Bd6 12.a4 (12.Qe2 g5=) 12...Be5 (12...g5 13.a5+=) 13.Nc3 g5 14.Qe2 Qc7 (14...Nb6 15.d3+=) 15.Nd1 (15.a5 Rh4=) 15...Bb2 16.Nb2 c4 17.Nd1 a6 18.Nc3 Nc5 19.0-0 Rh4 20.f4 Nfe4 21.Ne4 Ne4 (worse is 21...de4 22.Qc4 gf4 23.Rf4+/–) 22.Be4 de4 23.Kg2 f5 (23...Ke7 24.b6 Qd6 25.Qc4 (25.fg5?? Rh3 26.Rf4 Rah8-+) 25...Qd2 26.Rf2 Qe3 27.Qb4 Ke8 28.Ra3+/–) 24.fg5 (24.b6 Qc5+=) 24...0-0-0 (24...fg4!? 25.Rf8 Kf8 26.Qf2 Ke7 27.Qh4 ab5 28.Qg4 Qe5-/+ (28...Ra4?! 29.Rf1=)) 25.Rh1 (25.gf5 Rdh8 26.Rh1 ef5 27.ba6 ba6=) 25...fg4 26.hg4 Rdh8 (better is 26...Rh1!? 27.Rh1 c3 28.dc3 Qc3=) 27.Rh4+/– Rh4 28.Rh1 Rh1 29.Kh1 ab5 30.ab5 Qc5 31.Qf1 c3 32.dc3 Qc3 33.Qf2 Kd7 34.Kg2 Kd6 35.Kg3 Kc5 36.Qf4 Qe1 37.Kg2 Qe2 38.Kh3 Kd5 39.g6 b6 40.Kh4 Qc2= 41.Kg3 Qc8 42.Kh4? Qc1-/+ 43.Qg5 Kc4 44.Qe7? Qh1?? 45.Kg3-/+ Qf3 46.Kh4? Qf2-+ 47.Kh3 Qe3 48.Kg2 Qf3 49.Kh2 Qf4 50.Kh3 Qe5 51.Qa7 Kb5 52.Qd7 Kb4 53.Qe7 Kb3 54.Qb7 b5 55.Kg2 e3 56.Kh3 e2 57.Qf3 Qc3 (57...Qc3 58.Qd3 Qd3 59.Kh4 e1Q 60.Kh5 Qe5 61.Kh4 Qdg3#) 0–1. Valenta,Vit (2245) – Matejovsky,Ondrej (2050), Open, 2009.

7.c4 Nbd7 8.e3 c5 9.cd5 Nd5 10.Nc3 (10.bc5 Nc5 11.d4 Nd7=) 10...cb4 11.Nd5 ba3 12.Bc3 ed5 13.Qb3 Qb6 14.Qd5 Qc6 15.Qc6 bc6 16.Be2 Rb8 17.Bf3 Rb6 18.Ke2 Nf6 19.Rhc1 Kd7 20.h3 Be7 21.Bd4 Attacks the isolani on c6 21...Ra6 22.Ra2 Rb8 23.g3 Ne8 24.Ba1 f6 0–1. bulent_2010 – Snicks, ChessWorld.net, 2012.

7.d4 Ng4 8.e3 Rh2 9.Rh2 Nh2 10.Be2 Qg5 11.g3 Nd7 12.c4 dc4 13.Bc4 Nb6 (13...a5 14.b5+=) 14.Be2 (14.Bd3 0-0-0+=) 14...Qd5-/+ 15.Nd2 (15.Bd3 a5 16.ba5 Qa5 17.Bc3 Qh5 18.Qh5 gh5-/+) 15...Qh1 16.Nf1 Bd6 17.Kd2 a5 18.b5 Nf1 (18...Kd7 19.Nh2 Qh2 20.Qf1-/+) 19.Bf1 (19.Qf1 Qd5+=) 19...Kd7-/+ 20.Be2 Qg2 21.Qf1 Qd5 22.Bc3 a4 23.Bb2 (23.Qd1 Rh8-+) 23...Rh8-+ 24.Qc1? (better is 24.Bc3-+) 24...Rh2 25.Qg1 (25.Qf1 Qb3 26.Kc1 Kc8-+) 25...Qb3 26.Rb1 Ba3 27.Ba3 (27.Qh2?? Bb4 28.Kc1 Nc4 29.Bc4 Qc4 30.Kd1 Qd3 31.Kc1 Qd2) 27...Qa3 28.Rc1 (28.e4 Qa2 29.Ke3 f5-+) 28...Qb4 29.Kd1 (29.Kc2 Nc4 30.Bc4 Qc4 31.Kd2 Qb4 32.Rc3 Rh5-+) 29...Rh8 30.Qg2 (30.Qe1 Qb3 31.Kd2 a3-+) 30...Nd5 31.Bg4 (31.Qf3 f5 32.b6-+) 31...Qb3 32.Ke1 a3 33.Kd2 a2 (33...a2 34.Qg1 Rh2-+) 0–1. Orban,Chester J – Ribaudo,Jayme, corr WS/O/269 ICCF, 2009.

7.e3 c5 8.b5 Bd6 9.c4 Nbd7 10.cd5 ed5 11.h3 Qe7 12.Be2 Qe6 13.d4 c4 14.Nc3 g5 15.Rg1 Bh2 16.Rf1 Bc7 17.Qa4 0-0 18.Qc2 a6 19.Bf3 Ba5 20.Ke2 Bc3 21.Bc3 Ne4 22.Bb4 (22.Rfb1 Ndf6=) 22...Rfe8+= 23.Rfb1 a5 (23...ab5 24.Bc3+=) 24.Be1 b6 25.Kd1 Rac8 26.Kc1 c3 27.Qd3 Ndf6 28.Ra2 Rc4 29.Rc2 Rec8 30.Bd1 Nd2 (30...Qe8 31.Rb3+=) 31.Bd2= cd2 (31...Qe4 32.Qe4 cd2 33.Kd2 Ne4 34.Kc1 Nf2 35.Rc4 Rc4 36.Bc2+=) 32.Kd2 Ne4 33.Ke1 Rc2 34.Bc2 g4 35.hg4 Qg4 36.Qd1 Qg2 37.Be4 de4 38.Qe2 (38.Qb3 Kf8 39.a4 Ke7 40.Qa3 Ke6 41.Qa2 Kf6+=) 38...Rc3+= 39.Qb2 (39.a4 Ra3+=) 39...Qg1 40.Ke2 (40.Kd2 Rd3 41.Ke2 Qg4 42.Kf1 Qh3 43.Kg1 Kh7-/+) 40...Qg4 41.Ke1 Qc8 (41...Ra3 42.Qa3 Qg1 43.Kd2 Qb1 44.Qe7 Qb2 45.Ke1 Qb5 46.Qd8 Kh7 47.Qh4 Kg6 48.Qe4 f5 49.Qe6 Kh7 50.d5 Qb1 51.Ke2-/+) 42.Qa2 (42.Kd2 Rd3 43.Ke1 a4-/+) 42...Qh3-/+ 43.Qb2 Rd3 (better is 43...Ra3! 44.Qc2 Qh4-/+) 44.a4= f5 45.Qc2 (45.Rc1 Qh4 46.Qe2 Kf7+=) 45...f4-/+ 46.ef4 Rd4 47.Rb3 Qh1 ½–½. Taulien,Hans_Juergen (2350) – Mehlhorn,Uwe (2440), RSX8D – priv – XMAS, 2004.

7.e3 c5 8.bc5 Bc5 9.Nc3 Nc6=.

7.e3 c5 8.bc5 Bc5 9.d4 Qb6 10.Ra2 Be7 11.Nd2 Nc6 12.c4 0-0 13.Bd3 Rfc8 14.0-0 Rab8 15.cd5 Nd5 16.g3 Na5 17.h4 (17.Qa4 Qd8=) 17...Rc7= 18.h5 (18.Qa4 Nc3 19.Bc3 Rc3=) 18...g5 (18...gh5 19.Qh5 g6 20.Qe2=) 19.Bb1 (19.Qa4 Nc3 20.Bc3 Rc3=) 19...a6 20.Kg2 Rbc8 21.Re1 Qd6 (21...Qc6 22.e4 Nc3 23.Bc3 Qc3 24.d5=) 22.Qg4 (22.Qf3 b5=) 22...Nc3 23.Bc3 Rc3 24.Qf3 f5 (worse 24...Ra3 25.Ra3 Qa3 26.Qe4+/-) 25.g4 Nc6 26.gf5 Nd4 27.Qb7 Nf5 28.Ne4 Qc6 29.Rb2 (29.Qc6 R3c6 30.Ng3 Ng3 31.Kg3 Bd6 32.Kf3 Rc4+=) 29...g4 (29...Ra3 30.Rb6 Qb7 31.Rb7=+) 30.a4= Kf7 31.Qc6 (31.Rh1 Ra3=) 31...R3c6 (31...R8c6? 32.Nc3 Rc3 33.Rd1+-) 32.Bd3 Rh8 (32...g6 33.hg6 Kg6 34.Reb1=) 33.Rh1+= Nh4 34.Kg3 Rh5 35.Kg4 Rd5 36.Rb3 (36.Rd1 Nf5=) 36...Nf5= 37.Kf3 Ra5 38.Ra1 Nd6 39.Nd2 Bf6 40.Ra2 Bc3 (40...g5 41.Ne4=) 41.Rc2+= Rac5 42.Nb1 Ba5 (42...Bd4! 43.Rc5 Bc5+=) 43.Rc5+/- Rc5 44.Ba6 Rc2 45.Rd3 (45.Bd3 Ra2 46.Na3 Kf6+/-) 45...Ke7+= 46.Na3 (46.Rd1 e5+/-) 46...Ra2 47.Bc4 (47.Nc4 Nc4 48.Bc4 Ra4=) 47...Nc4 (47...Ra3 48.Ra3 Nc4 49.Ra1=+) 48.Nc4= Ra4 49.Ne5 Kf6 50.Nd7 Kf5 51.Rb3 Rb4 (51...e5 52.Rb5 Bc3 53.Nc5=) 52.Ra3 Rb5 53.e4 Kg6 54.Ke2 Kf7 ½-½. alekhinebattery (2425) - marekt (2355), gameknot.com, 2021.

7.e3 Bd6 8.c4 dc4 (8...Bh2? 9.Be5+-; worse is 8...Rh2 9.Rh2 Bh2 10.g3+/–) 9.Bc4 Nbd7 (worse is 9...Rh2 10.Rh2 Bh2 11.g3+/–) 10.Be2 Qe7 (worse is 10...Bh2 11.g3+/–; worse is 10...Rh2 11.Rh2 Bh2 12.g3+/–) 11.Qc2 0-0-0 12.Nc3 Kb8 (worse is 12...Rh2 13.Rh2 Bh2 14.g3+/–) 13.Rc1 Nb6 (worse is 13...Rh2 14.Rh2 Bh2 15.g3+/–) 14.h3 Rh7 15.Nb5 Qd7 16.0-0 a6 17.Nd6 Qd6 18.Rfe1 Nbd5?? (better is 18...e5+=) 19.e4+- Nf4 20.e5 Ne2 21.Re2 Qd5 (21...Qe7 22.ef6 gf6+-) 22.Qc7 Ka8 23.ef6 gf6 24.Bf6 Rd7 (24...Rb8+-) 25.Qb6 1–0. capablancaven (1895) – mostarac78 (1855), gameknot.com, 2012.

7.e3 Bd6 8.c4 Nbd7 (worse is 8...Rh2 9.Rh2 Bh2 10.g3 dc4 11.Bc4+/–) 9.c5 Be5 (9...Be7!?=) 10.d4+/– Rh2 (10...Bh2!? 11.Nd2 Ne4+/–) 11.Rg1 Bg3 (11...Bd4 12.Qd4 e5 13.Qc3+-) 12.fg3+- Ne4 13.Nd2 Ng3 14.Nf3 Rh5 15.c6! bc6 16.Qa4 Nb8 (16...Kf8 17.Qc6 a5 18.b5+-) 17.Bd3 g5 (17...Kf8 18.Qc2 Qd6 19.Ne5+-) 18.Rc1 (18.Ne5 g4+-) 18...g4 19.Ne5 Qh4?? (19...Kf8+-) 20.Rc6 (20.Rc6 Kd8 21.Nf7 Kd7 22.Rc2 c6 23.Kd1+-) 1–0. forsetinn (2280) – wreck_tangle (1875), gameknot.com, 2014.

5.e3 Nbd7 6.d4 e6 7.c4 Be7 8.Nc3 c6 9.Rc1 0-0 10.Qb3 Ne4 11.a4 Bf6 12.Be2 Re8 13.cd5 cd5 14.Nb5 Rf8 15.Ne5 a6 16.Na3 Be5 17.de5 Qg5 18.g3 Qd8? (better is 18...a5!?=) 19.f3+/– Ng5 20.g4 (better is 20.h4!? Ne4 21.fe4 Be4 22.0-0+-) 20...Nf3+= 21.Bf3 Qh4 22.Kd2 Qf2 23.Be2 Bg4 24.Qd1 Be2 25.Qe2 Qh4 26.Bc3 (26.Bd4 f6 27.ef6 Nf6+=) 26...Rac8 (26...f6!?=) 27.Rhg1+= f5 28.ef6! Nf6 29.Bf6 Qf6 30.Rc8 (better is 30.Nc2!?+/–) 30...Rc8= 31.Nc2 Qc3 32.Kd1 Qb3 33.Kc1?? (better is 33.Qd2=) 33...Rc2!-+ 34.Qc2 Qe3 35.Kb2 Qg1 36.Qc8 Kh7 37.Qb7 Qh2 38.Kc3 Qe5 39.Kd3 Qe4 40.Kd2 e5 41.Qa6 Qb4 42.Kc2 e4 43.Qb5 Qd4 44.a5 Qf2 45.Kb3 Qf3 46.Kb4 d4 47.Qd5 Qc3 48.Kb5 Qd3 49.Kc5 e3 50.Qf3 Qc2 51.Kd5 e2 52.Qf2 Qd3 53.a6 Qa6 54.Qf5 Qg6 55.Qe5 Qg5 0–1. Zizys,V – Zalys,Ignas, Montreal m, 1961. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 Nf6)

5.e3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 h6).

5.c3 Bd6 6.d4 h6 (6...Ne4 7.e3+=) 7.Nbd2 (7.e3 Ne4+=) 7...Nbd7 8.a5 0-0 (8...e5 9.a6 e4 10.ab7=) 9.Nb3 (9.e3 b6+=) 9...b6 (9...Rb8 10.e3+=) 10.a6 (10.e3 c5 11.ab6 ab6 12.bc5 bc5+=) 10...c5-/+ 11.b5 (11.bc5 bc5 12.Ba3 Ne4-/+) 11...e5 (11...Ne4 12.e3-/+) 12.de5 Ne5 13.Nbd2 (13.e3 Re8-/+) 13...Nfd7 (13...Qe8 14.e3 Nd3 15.Bd3 Bd3-/+) 14.e4 (14.e3 Re8-/+) 14...de4 (14...Re8-+) 15.Ne4? (better is 15.Ne5!? Ne5 16.Nc4 Nd3 17.Bd3 ed3 18.Nd6 Qd6 19.0-0-+) 15...Be4-+ 16.Qd6 Nf3 (16...Bf3 17.gf3 Nf3 18.Kd1-+) 17.gf3 Bf3 18.Be2?? (18.Rg1 Nf6 19.Qd3 Qd3 20.Bd3-+) 18...Re8 19.0-0-0 Qg5 20.Kb1 Re2 21.Rhg1 Qf5 22.Rd3 Qd3! 23.Qd3 Be4 24.Qe4 Re4 25.c4 f6 26.Bc1 Kf7 27.Rd1 Rd4 28.Rg1 Rc4 29.Be3 Rb4 30.Kc2 Rb5 31.Rd1 Ne5 32.f4 Ng4 33.Bg1 Re8 34.Rd7 Re7 35.Rb7 Ra5 36.h3 Ra6 37.Re7 Ke7 38.hg4 Ra4 39.Be3 g5 40.Bd2 gf4 41.Kd1 f3 42.Ke1 Rg4 43.Bh6 a5 44.Kf2 a4 (44...a4 45.Bc1 Rc4-+) 0–1. Feldstein – Kumaran, New York, 1990. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Bf5 4.a4 e6)

5.c3 Bd6 6.Nd4 Bg6 -/+.

5.c3 Bd6 6.e3 0-0 7.Be2 Nbd7 8.0-0 c5 9.bc5 Bc5 10.Na3 a6 11.c4 Rc8 12.cd5 ed5 13.Qb3 Rb8 14.Nc2 Re8 15.Ncd4 Bd4 16.Bd4 1–0. Woschkat – Bankler, IECG 1996.

5.c3 Bd6 6.e3 a5 7.b5 =+.

5.c3 Bd6 6.e3 b6 7.Be2 (7.Nd4 Bg6=) 7...e5 (7...a5 8.b5=+) 8.0-0 c5 (8...0-0 9.c4=+) 9.bc5 (better is 9.d4 ed4 10.bc5 bc5 11.cd4=) 9...d4?? (9...bc5!? 10.d4 ed4 11.Bb5 Kf8 12.ed4 c4=+) 10.Na3 (10.Bb5 Nbd7 11.cd6 de3 12.Ne5 0-0+-) 10...a6?? (10...bc5 11.Bb5 Nbd7+/–) 11.c4?? (better is 11.Nh4 d3 12.Bf3+- (12.cd6?! de2 13.Qe2 Bg4+/–)) 11...bc5= 12.Qc1 (12.d3 0-0=) 12...Bg4 (12...d3 13.Bd1 Nbd7 14.Nh4=+) 13.Bd1 (13.ed4 ed4 14.Qd1 Qd7=+) 13...Qa5 (better is 13...0-0=+) 14.Bc3?? (14.ed4 cd4 15.c5 Qc5 16.Nc4=) 14...Bc8 (14...dc3 15.dc3 Nc6 16.Ng5-+) 15.g3 (better is 15.Ba5 e4 16.ed4 ef3 17.Re1 Kf8 18.Bf3+-) 15...Ra7 (better is 15...dc3 16.Qc3 Qc3 17.dc3 e4-+) 16.Bd4 (16…ed4 17.ed4 cd4 18.Re1 Re7 19.Re7 Be7 20.Nd4-+; better is 16.Ba5 e4 17.Ne1+-) 1–0. Woschkat,Karl_Heinz – Bankler,Brian, IECG, 1996.

5.Bc3 Ne4 =+.

5.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5).

5.e3 Bd6 6.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6).

5.a3 a5 6.e3 Nbd7 7.b5 Bd6 8.Bd3 Bd3 9.cd3 0-0 10.d4 Qe7 11.0-0 h6 12.d3 c5 13.bc6 bc6 14.e4 Rab8 15.Qc2 e5 16.ed5 cd5 17.Rfe1 e4 18.de4 de4 19.Ne4 Ne4 20.Re4 Rb2 21.Re7 Rc2 22.Rd7 Ba3 23.g3 Bb4 24.Ne5 Re8 25.Rb1 (worse is 25.Nf7 Rf8 26.Nd6 Rff2-+ (26...Rcf2?! 27.Nc4+=)) 25...Rd2 26.Nf3 (worse is 26.Nf7 Rf8 27.Nd8 Rff2-/+ (27...Rdf2?! 28.Rc1=)) 26...Ra2 27.Ne5 f6 28.Nd3 Bf8 29.Ra7 ½–½. Nett,Philipp (2135) – Baumann,Dariusz (2140), CL2–2008.09.03, 2008.

5.a3 c5 6.e3 cb4 7.ab4 Bb4 Black has a new passed pawn: a7 8.Nb5 Nc6 9.Nbd4 0-0 10.Nc6 bc6 11.Nd4 White threatens to win material: Nd4xc6 11...Ne4?? Black lets it slip away (better is 11...Qd6+= and Black is still in the game) 12.Nc6+/– Qh4? (better is 12...Qd6!? 13.Nb4 Qb4+/–) 13.g3+- Bd2 (13...Ng3 14.Rg1 (14.fg3?! Qe4+=; 14.hg3?! Qh1 15.Nb4 Rfb8=) 14...Bd6 15.hg3+- (15.fg3? Qh2 16.Ne7 Be7-+)) 14.Qd2 Nd2 15.gh4 Be4?! puts up no strong fight (15...Nf3 16.Kd1 Be4 17.Bd3+- (17.Ra7?! Ra7 18.Na7 Ra8+/–)) 16.Ne7 (better is 16.Kd2 might be the shorter path 16...Bh1 17.Ba3+-) 16...Kh8 17.Bg7 (better is 17.Kd2 would have given White the upper hand 17...Bh1 18.Be2+-) 17...Kg7+= 18.Rg1 Kf6 19.Nd5 Bd5 20.Kd2 White has a new passed pawn: c2 20...Rfd8 21.Bd3 a5 22.Rg4 e5 23.e4 h5= Black threatens to win material: h5xg4 24.Rg5 White threatens to win material: Rg5xh5 24...Be4 25.Rh5?? Bg6-+ 26.Rg5 e4 27.Rga5 Ra5 28.Ra5 ed3 29.cd3 Rd3 30.Ke2 Rh3 31.Ra4 Rh2 32.Kf3 Bf5 33.Kg3 Rh3 34.Kg2 Rc3 35.Rb4 Bh3 36.Kh1 Be6 0–1. Quabach,Juergen (2170) – Sadkiewicz,Joanna (2175), Oberliga NRW, 2001.

5.a4? Bb4-/+ 6.Ne5 0-0 7.e4 (7.f3 a6-+) 7...Ne4 8.Bd3 Bc3 9.dc3 Nd7 (better 9...Qd6 10.Nf3 Qb6 11.Be4 de4-+ (11...Be4?! 12.Ba3 Re8 13.0-0-+)) 10.f4?? (10.Nd7 Qd7 11.f3-+) 10...Ne5 11.fe5 (11.Be4 Be4 12.fe5 Bg2-+) 11...Qh4 12.g3 Ng3! 13.hg3 (13.hg3 Qg3 Double attack (13...Qh1 Pinning; 13...Qh1 Deflection)) 13...Qh1 14.Kd2 Qh6 15.Ke2 (15.Ke1 Qe3 16.Qe2 Qg3 17.Qf2 Qe5 18.Kd2 Bd3 19.cd3 c5-+) 15...Qh2 (better 15...Bg4!? 16.Ke1 Bd1 17.Rd1 Qe3 18.Be2 Qg3 19.Kd2-+) 16.Kf3 (16.Ke1-+) 16...Bd3 17.cd3 Qb2 (better 17...f6 18.Ke3 fe5 19.Qe1 Qb2 20.Rb1-+) 18.Rb1 Qc3 19.Rb7 Qe5 (19...Rab8 20.Rb1-+) 20.d4 Qf5 21.Kg2 Rfb8 22.Qb3 Rb7 23.Qb7 Rf8 24.a5 h5 25.a6 Qe4 26.Kh3 Qd4 (26...Qh1) 27.Qc7 Qb6 (27...Qg1 28.g4 f5 29.Qe5 Qh1 30.Kg3 h4 31.Kf2 fg4 32.Ke3 Qc1 33.Ke2 Qc4 34.Kd1 Rf1 35.Qe1 Qd3 36.Kc1 Re1 37.Kb2 Rb1 38.Ka2 Qb3) 28.Qe5 Qa6 29.Qh5 Qc4 (29...Qf1 30.Kh4 Rb8 31.Qe5 Rb4 32.g4 Qh1 33.Kg3 Qg1 34.Kf3 Rb3 35.Qc3 Rc3 36.Ke2 Qe3 37.Kf1 Rc2 38.g5 Qf2) 30.g4 Qe4 31.g5 (31.Kh4 Rb8 32.Qg5 Qh1 33.Kg3 Rb3 34.Qe3 Qg1 35.Kh3 Qe3 36.Kg2 Qe2 37.Kg1 Rb1) 31...Qh1 (31...Rb8 32.Qd1 Qe3 33.Kh4 Rb4 34.Qg4 Qf2 35.Kh3 Rb3 36.Qf3 Qf3 37.Kh2 Rb1 38.g6 Rh1) 32.Kg4 Qh5 33.Kh5 g6 34.Kg4 Kg7 35.Kf4 Rh8 36.Ke5 Rh4 37.Kd6 Re4 (37...d4 38.Kd7 d3 39.Kc8 d2 40.Kb8 d1Q 41.Kc7 Rc4 42.Kb7 Qd7 43.Ka6 Ra4) 38.Kc5 Rg4 39.Kb5 Rg5 40.Kc5 Rg4 41.Kb5 (41.Kc6 Rc4 42.Kb7 g5 43.Ka7 g4 44.Kb6 g3 45.Kb5 g2 46.Kb6 g1Q 47.Kb5 Qb1 48.Ka5 e5 49.Ka6 Ra4) 41...Rc4 42.Ka5 (42.Ka6 Rc7 43.Kb5 d4 44.Ka6 d3 45.Kb5 d2 46.Kb4 d1Q 47.Kb5 Qb3 48.Ka5 e5 49.Ka6 Qb6) 42...g5 43.Ka6 (43.Kb5 g4 44.Ka6 g3 45.Ka7 g2 46.Kb6 g1Q 47.Kb5 Qb1 48.Ka5 e5 49.Ka6 Ra4) 43...g4 44.Kb7 (44.Ka7 g3 45.Kb6 g2 46.Ka5 g1Q 47.Kb5 Qb1 48.Ka5 e5 49.Ka6 Ra4) 44...g3 45.Kb8 (45.Ka7 g2 46.Ka6 g1Q 47.Kb5 Qb1 48.Ka5 e5 49.Ka6 Ra4) 45…g2 (45...g2 46.Ka7 g1Q 47.Ka6 Rb4 48.Ka5 Qb6) 0-1. Beserking101 (2020) - MrBug (2065), Rated Bullet tournament yvefH0gJ, lichess.org, 2015.

5.e3 Bd3 6.Na3 Qd5 7.Bd3 cd3 += (worse is 7...Qd3 8.Rc1+=).

5.e3 Bd3 6.Bd3 cd3 7.0-0 e6 8.Qa4 c6 9.Bf6 (9.Rc1 Nbd7+=) 9...gf6 (9...Qf6 10.Nc3-/+) 10.b5 a6 11.Nc3 cb5 12.Nb5 Nd7 13.Nc3 Rg8 (13...f5!?-/+) 14.Qe4 (14.Rab1 Rb8=) 14...Nc5+= 15.Qh7 Rg7 16.Qh3 Rc8 17.Rfb1 f5 18.a4 Qc7 19.Qh8 b6 20.g3 Nd7 21.Rc1 Qb7 22.Ne1 Ne5 23.Rab1 Rd8 24.Nd1 (24.a5 b5+=) 24...Qd5 25.Nc3 Qa5 26.Qh3 Rg8 27.Qg2 Ba3 28.Rd1 Kf8 (28...Bc5 29.Qb7+=) 29.Rb3 Bb4 30.Rdb1 Bc5 31.Qh3 (31.Qb7 Nc4 32.Nf3 Rh8=) 31...Kg7 (31...Ke7 32.Qh4 f6 33.Qh7 Nf7 34.Qh5-/+) 32.Qh4 Rd7 (32...f6 33.Qf4+=) 33.Qf4 Be7 (33...Ng6 34.Qc4 Rgd8 35.h4+=) 34.Nf3 Nf3 35.Qf3 Rc8 (35...Bc5 36.Qf4=) 36.Rb6+= Bf6 37.Rb8 Rdd8 38.Rc8 Rc8 39.Rd1 (39.Qh5 Bc3 40.Rb7 Rf8 41.dc3 Qc3 42.Qg5 Kh7=) 39...Qb4 40.e4 Bc3 41.dc3 Qe4 42.Qd3 (42.Rd3 Qa4 43.Qe3 Qa1 44.Kg2 Qa4+=) 42...Qd3 (42...Qa4 43.Qd2=) 43.Rd3+= a5 44.Rd6 (44.h4 Rc4+=) 44...Rc4 45.Ra6 Ra4 46.Kg2 e5 47.h4 f6 48.Ra7 (48.Kf3 Kg6=) 48...Kg6 49.c4 Rc4 50.Ra5 Rc2 51.Kf3 Rc3 52.Ke2 Rc6 (52...f4 53.gf4 ef4 54.h5 Kh6 55.Rf5=) 53.Kd2 (53.Rd5 Kh5+=) 53...Kh5 54.Ra4 Rb6 55.Ke2 Rb2 56.Kf1 Rb6 57.Ke2 Rb3 58.Kf1 Rb6 59.Ke2 Rb2 60.Ke3 Rb3 61.Ke2 Rb6 62.Ke3 Rb3 63.Ke2 Kg6 64.Rc4 Rb6 65.Rc3 Kh5 66.Kf3 Ra6 67.Rb3 Rc6 68.Ra3 Rc2 69.Rb3 Ra2 70.Rc3 Rb2 71.Ra3 Rb6 (71...e4 72.Ke3=) 72.Rc3 Ra6 73.Rb3 Ra2 74.Rc3 ½–½. Rusdin (1945) – The_great_omni (2265), gameknot.com, 2015.

5.e3 Bd3 6.Bd3 Qd3 7.Na3 Qd5 8.0-0 =.

5.Ne5 =+.

5.a3 a5 6.b5 c5 7.Nbd2= b6 (7...Bg6 8.e3=) 8.a4 (8.Nh4 Bg6=) 8...Bd6 9.g3 Nbd7 10.Bg2 Rc8 11.c4 0-0 12.0-0 e5 (better 12...d4!?=) 13.cd5+/- e4 (better 13...Bg4!?+/-) 14.Nh4+- Bg6 (14...Bg4 15.Nc4 (15.Be4?! Re8+/-) 15...Bb8 16.de4+- (16.Be4?! Ne4 17.de4 Bh3+-)) 15.Ng6 hg6 16.Nc4 Bb8 (16...Qc7 17.de4 Rfe8 18.Qc2+-) 17.de4 Re8 18.Qc2 g5 (18...Qe7 19.Bf6 gf6 20.Rfd1+-) 19.f4 (19.d6!? Ba7+-) 19...gf4 20.gf4 Nh5 (20...Nh7 21.e5+-) 21.e5 Nf8 22.Qf5 g6 23.Qg4 Kh7 24.Be4 White intends f5 24...Kh6 (24...Ng7+-) 25.f5 Qg5 (25...Be5 26.Ne5 Re5 27.Be5 Nd7 28.Bf4 Nf4 29.Rf4 Qg5 30.Qg5 Kg5+-) 26.Bc1 (26.Bc1 Qc1 27.Rac1 Be5 28.fg6 Ng6 29.Rf7 Bd4 30.e3 Re4 31.Qe4+-) 1-0. Valenta,Vit jr (2090) - Macek,Ondrej (1865), 31st Czech Rapid G1, 2020.

5.b5 c5 6.Nbd2 Qa5 7.c4 =+.

5.b5 c5 6.Nbd2 Qb6 7.a4 (7.Bf6 gf6 8.e4 Bg6=) 7...a6 (7...Qa5 8.e3=) 8.c4 (8.Bf6 gf6 9.e4 Bg4=) 8...ab5 (8...d4 9.e4 de3 10.fe3=) 9.ab5 (9.Bf6 gf6 10.cd5 ed5 11.ab5 Ra1 12.Qa1 Bg7= (12...Qb5?? 13.Qf6 Rg8 14.Qf5+-)) 9...Ra1 10.Qa1 Be7 (10...d4 11.e3 de3 12.fe3+=) 11.g3 (11.e4 Bg4=) 11...0-0 12.Bg2 h6 (12...d4 13.0-0=) 13.0-0 Nbd7 (13...dc4 14.dc4 Rd8 15.Bc3+=) 14.e4 Bh7 15.Ne5 (15.Re1 de4 16.de4 Rd8=) 15...Qc7 (15...d4 16.Nd7 Nd7 17.f4=) 16.Nd7 (16.ed5 ed5 17.cd5 Nb6=) 16...Qd7= 17.Bc3 (17.Qe1 Ra8=) 17...d4 18.Bb2 Bd6 19.Qa7 e5 (19...Ng4 20.Nb3 Qc7 21.Ba3=) 20.Ra1 g5 (20...Bg6 21.Qb6=) 21.Nb3+= Qc7 22.Bc1 Kg7 23.Bd2 Rb8 24.Ba5 b6 25.Qc7 Bc7 26.Bd2 Rb7 27.Nc1 Bg6 28.f4 gf4 29.gf4 Bh5 30.h3 Nd7 31.f5 Bd8= 32.Ra8 Bh4 33.Kf1 Bd1 34.Kg1 Nf8 35.Bf1+= Nh7 36.Be2 Be2 37.Ne2 Bg5 38.Bg5 hg5 39.Ng3 Nf6= 40.Kg2 Kh7 41.Kf3 Kg7= 42.Nh1 Nh5 43.Nf2 (43.Kg4 Nf4 44.Ng3 A) 44...Nd3 45.Nh5 (45.Kg5?! f6 46.Kh4 Nf4=) 45...Kh7 46.Kg5 f6 47.Nf6 Kg7 48.Rg8 Kf7 49.Rh8+-; B) 44...Kh6+=) ½–½. Reefschlaeger,Helmut (2385) – Krauseneck,Peter (2310), Bundesliga, 1994.

5.b5 c5 6.Nbd2 Nbd7 7.Nh4 =.

5.b5 c5 6.Nbd2 h6 7.g3 (7.e4 de4 8.Bf6 Qf6 9.de4 Bg4=) 7...Nbd7 8.c4 Bd6 9.Bg2 0-0 10.0-0 Bh7 (10...Qc7 11.a4=) 11.cd5 (11.a4 a6=) 11...ed5 12.Qb3 Re8 Black fights for the Initiative 13.e3 Qb6 14.a4 a6 15.Nh4 (15.Bh3 ab5 16.ab5 Be7=) 15...Be5=+ 16.Be5 Ne5 17.ba6 Qa6 18.d4 c4 19.Qc3 Nc6 20.Rfc1 Qa5 21.Qa5 Ra5 22.Nb1 g5 23.Nf3 b5 24.Nfd2 b4 (better is 24...Nb4!? 25.Nc3 ba4 26.Ra4 Ra4 27.Na4 Ra8-/+) 25.Nc4= Nd4 26.Na5 (26.ed4 dc4) 26...Ne2 27.Kf1 Nc1 28.Nd2 ½–½. Pommerel,Wim – Gross,Wilhelm, corr, 1996.

5.b5 Bc5 6.Nbd2 0-0 (6...a6 7.e4 de4 8.Bf6 Qf6 9.de4=+) 7.c4 (7.e3 a6=+) 7...dc4 (7...d4 8.a3 Qd6 9.Nb3=+) 8.Qc1 Ng4 (8...a6 9.e4 Bg4 10.Qc4=+) 9.d4= Bb4 10.Qc4 Qd6 11.Rc1 (11.Bc3 Bc3 12.Qc3 Nf6=) 11...c6=+ 12.h3 Nf6 13.e3 (13.g4 cb5 14.Qb5 Be4=+) 13...Ne4 14.a4 (14.Qb3 a6 15.bc6 Nc6=+) 14...Nd7 (14...a6 15.bc6 Nc6 16.Qb3-/+) 15.bc6=+ Nd2 16.Nd2 Ne5 17.Qb5 (17.de5 Qd2) 17...Bd2 18.Kd2 Nc6 19.Be2 (19.Qb7 Rab8 20.Rc6 Qd5=+) 19...Be4 (19...Rfc8 20.g4 (20.Qb7 Rab8 21.Qb5 Be4-+) 20...Bg6 A) 21.Qb7 Rab8 22.Ba3 Qa3 (22...Rb7 23.Bd6 Rb2 24.Ke1+/–) 23.Rc6 Qa2 (23...Rb7 24.Rc8 Qf8 25.Rf8 Kf8 26.Bb5+/–) 24.Ke1 Qb1 (24...Rb7 25.Rc8) 25.Qb1 Rb1 (< 25...Bb1 26.Rc8 Rc8 27.f3+/–) 26.Kd2 Rc6 27.Rb1 Bb1-+; B) 21.Bf3=) 20.f3 (20.Qb7 Rfb8 (20...Bg2?! 21.Bb5 Bh1 22.Rh1-+) 21.Rc6 Bc6-+ (21...Rb7?! 22.Rd6 Rb2 23.Ke1-/+)) 20...Bd5 (20...Bg6 21.Rhd1=) 21.Bc3 a6 22.Qb6 Qa3 23.Ra1+= Qe7 24.e4 Qg5 25.Kd3 Ne7 26.h4 Qg2 27.ed5 Nd5 28.Qb2 Rac8 29.Ba5 b6=+ 30.Bb4 Rfd8 31.Rhg1 Qf2-+ 32.Bd2 e5! 33.Rg4 f5 34.Rf1 Qh2 35.Bg5 fg4 36.Bd8 Rc3 37.Kd2 Qf4 38.Kd1 Ne3 39.Ke1 Ng2 40.Kf2 Qh2 41.Bc4 Rc4 42.Rb1 Rd4 43.Qa2 Kh8 44.Bb6 Nh4 45.Kf1 Qh1 46.Kf2 Qg2 47.Ke1 Nf3# 0–1. Good_Boy – crafty, ICC, 1997.

5.b5 c6 6.a4 Nbd7 7.Nbd2 cb5 8.ab5 Nb6 (8...Qb6 9.Nd4=+) 9.g3 Be7 10.Bg2 0-0 11.0-0 Qd7 12.Nd4 Bg6 13.N2f3 (13.c4 dc4 14.Nc4 Nc4 15.dc4 Rfc8=) 13...Bd6=+ 14.Bh3 Ne8 (14...Bh5 15.Qd2=+) 15.Ba3 Ba3 16.Ra3 Qd6 17.Qa1 Nc8 18.Qa2 f5 (18...Nc7 19.c4=) 19.Ra1 (19.c4 dc4 20.dc4 Nc7+=) 19...Nc7 20.c4 dc4 21.dc4 Bf7 22.Nb3 Qe7 (22...e5!? 23.Qc2 Be6+=) 23.Ne5+- a6 24.Bg2 Rb8 25.ba6 (25.Nf7?! Rf7 26.ba6 ba6=) 25...Na6 26.Ra6 ba6 27.Nc6 Qc7 28.Nb8 Qb8 29.Nc5 Qa7 30.Na6 Kh8 (30...e5 31.Qb2 e4 32.Qc3+-) 31.c5 Ne7 (31...e5 32.Qa5+-) 32.Qb2+- Nd5 (32...Qd7 33.e3+-) 33.c6 Nb6 (33...Kg8 34.e3+-) 34.c7 Rc8 35.Qc3 Na8 36.Ba8 (better 36.Nc5!? Qb6 37.Ba8 Qc7+-) 36...Qa8 37.Qb2 h6 (37...e5 38.Qb8 (38.Qe5?! Bg8+-) 38...Be6 39.Rd1 Qb8 40.cb8Q (40.cb8B?! Bc4+-) 40...Rb8 41.Nb8+-) 38.Qb6 (better 38.Qb8! Kh7 39.Qa8 Ra8 40.Rb1+-) 38...Kh7 39.Rd1 e5 40.Rd6 (better 40.Rd7 Bh5 41.f3+-) 40...Bc4+= 41.Nb8?? (better 41.Qb1 Qe4 42.Qe4 fe4 43.e3+=) 41...Qa1 42.Kg2 (42.Qb1 Qb1 43.Kg2 Be2 44.Rh6 Kh6 45.g4 Qf1 46.Kg3 Qg1 47.Kh4 Qg4) 42…Be2 (42...Be2 43.h4 Qf1 44.Kh2 Bf3 45.Rh6 gh6 46.Qg6 Kg6 47.h5 Kf7 48.Nc6 Qg2) 0–1. Burn,Michael – Boyd,David, NZL New Zealand North Island Ch Wanganui, 1992. (New Zealand Chess Magazine Vol 18 No 3 June 1992)

5.b5 c6 6.Nbd2 cb5 7.e4 Bg6 8.e5 Nfd7 9.Be2 Be7 10.0-0 Nc6 11.d4 b4 12.Nb3 Rc8 13.Bd3 Nb6 14.Bg6 hg6 15.Qd3 Nc4 16.Bc1 a5 17.Nbd2 b5 18.c3 (18.Nc4 bc4 19.Qe2 g5-/+) 18...bc3-+ 19.Qc3 Qb6 (19...Bb4 20.Qd3-+) 20.Nc4 bc4 21.Bb2 Qb4 22.Qc2 Qb7 23.Bc3 Nb4 24.Qd2 Qc7 25.a3 Nc6 26.Rfb1 0-0 27.Rb5 a4 28.Rab1 Rb8 29.Qc2 Qa7 30.Rb8 Rb8 31.Rb8 Qb8 32.Nd2 (32.Qc1 Qb3 33.Bb2 Na7-+) 32...Ba3 33.Qa4 Bb2 34.Qc2 Bc3 35.Qc3 Qb6 (36.Qc1 Nd4-+) 0–1. Schild,Reinhard – Boettcher,Christian, DESC, 2000.

5.b5 Nbd7 6.e3 h6 (6...Bb4 7.Nbd2=+) 7.Be2= Bb4 8.c3 (8.Nc3 e5=) 8...Bd6 9.0-0 c6 10.a4 0-0 11.c4 e5 12.Nc3 Re8 Black prepares the advance e4 13.cd5 cd5 14.d4 (14.a5 Qc7=) 14...e4 15.Nd2 Rc8 16.Rc1 Bb8 17.g3 Bh3 18.Re1 Nf8 (18...Bd6 19.f3=) 19.Bf1 (19.Qb3 Ne6=) 19...Qd7 20.Ne2 (20.Bh3 Qh3 21.f3 Ng6 22.fe4 de4=) 20...Bf1 21.Nf1 Ne6 22.Nd2 Ng5 23.Nf4 Rc1 24.Bc1 (24.Qc1 Bf4 25.ef4 Nh3 26.Kg2 Qg4-/+) 24...Bf4 25.ef4 (25.gf4 Nh3 26.Kg2 Ng4-+) 25...Nh3 26.Kg2 Ng4 27.Re2 (27.Qe2 Ngf2 28.Nb3 Nd3-/+) 27...Nhf2 28.Rf2?? (28.Qb3 Nd3 29.Ba3 Nf6-+) 28...Nf2 (better 28...Ne3 29.Kg1 Nd1-+) 29.Kf2 e3 30.Kg2 (30.Kg1 ed2 31.Bd2 Qe7-+) 30...ed2 31.Bd2 Qf5 32.Bb4 (32.Bc3 Qe4 33.Kh3 Rc8-+) 32...Qe4 33.Kf2 (33.Kg1 Rc8 34.Bd2 Rc2-+) 33...Rc8 34.Bc5 (34.Bd2 Rc2-+) 34...b6 35.Bb4 (35.Qe2 bc5 36.Qe4 de4 37.dc5 Rc5-+) 35...Rc2 36.Bd2 Qd4 37.Ke1 Qg1 (37...Rb2 38.Ke2 Qe4 39.Kf2-+) 38.Ke2 Qh2 39.Kd3 Rd2! 40.Qd2 Qd2 (40...Qg3 41.Kc2 Qg6 42.Kb3-+) 41.Kd2 Kf8 42.Kd3 Ke7 43.Kd4 Ke6 44.g4 (44.Ke3 Kf5 45.Kd4 Kg4 46.Kd5 Kg3-+) 44...g6 45.f5 (45.Kd3 f5 46.gf5 gf5 47.Kd4-+) 45...gf5 46.gf5 Kd6 47.Ke3 Ke5 48.f6 Kf6 49.Kf4 h5 (49...h5 50.Kf3 Ke5-+) 0-1. darhaa (2180) - salute (2120), Rated Blitz game, lichess.org, 2014.

5.c3 a5 6.Qa4 Nbd7 7.ba5 Bd6 8.Nbd2 (8.Qb5 Ra7+=) 8...0-0-/+ 9.Nh4 h5 (9...Nc5!? 10.Qc2 Bg4+=) 10.Nf5= ef5 11.g3 (11.c4 Nc5 12.Qc2 Ra5 13.cd5 Nd5=) 11...Re8 12.Bg2 Qe7 13.e3 Ne5 14.Qc2 Neg4 15.0-0 (15.Nb3 h4 16.Nd4 Qd7+=) 15...h4= 16.Rae1 Nh2 (16...Ra5!? 17.c4 hg3 18.hg3 Ra2=) 17.Kh2+= Ng4 18.Kh1 (better is 18.Kg1!? hg3 A) worse is 19.Bd5 c6-/+ (19...gf2?! 20.Rf2 c6 21.Bf3 Ne3 22.Re3 Qe3 23.Nc4=); B) 19.fg3 Ne3 20.Qa4+=) 18...hg3-/+ 19.Bh3?? (better is 19.Nf3 gf2 20.Rf2-/+) 19...Qh4-+ (19...Nf2?! 20.Kg2 Nh3 21.a6 Ra6 22.c4-+) 20.Kg2 gf2 21.Nf3 Qg3 22.Kh1 Qh3 23.Nh2 Qh2 0–1. bernhard5 (1730) – the_great_omni (2300), gameknot.com, 2015.

5.Nbd2 Bb4 6.c3 Bd6 7.e4 de4 8.de4 Ne4 9.Ne4 Be4 10.Be2 (better 10.Qd4!? Bf3 11.Qg7-/+) 10...0-0 11.0-0 Nc6 (11...Qf6 12.Qd4 Qd4 13.Nd4-+) 12.Qb3 (12.Qa4 Bf5-+) 12...Ne5 13.Nd2? (13.Ne5 Be5 14.c4 Qg5-+) 13...Bc6 (better 13...Bg2!? 14.Kg2 Qg5 15.Kh1 Qd2 16.Rae1-+) 14.c4 Qg5 15.Nf3 (15.Qg3 Qg3 16.hg3 Rad8-+) 15...Nf3 16.Bf3 Bf3 (16...Qf4 17.Rfd1-+) 17.Qf3 c6 (17...Qh4!? 18.g3 Qc4 19.Rfd1-+) 18.Rad1 Rad8 19.g3 f5 (19...Rfe8 20.Ba3 Ba3 21.Qa3-+) 20.h4 (20.Qe2 Rfe8-+) 20...Qg6 21.Qg2 (21.h5 Qg5-+) 21...f4 (21...Qg4 22.Rd4 Qe2 23.f4-+) 22.g4? (better 22.gf4 Qf7 23.Be5-+) 22...f3 23.Qh3 White prepares the advance h5 23...Qc2 24.Bc1 (24.Rd6 Rd6 (24...Qb2?! 25.Rd8 Rd8 26.Qf3-+) 25.Ba3 Rdd8 26.Bf8 Rf8-+ (26...Kf8?! 27.Qf3 Kg8 28.Re1-+)) 24...Qc4 (24...Bh2! 25.Kh2 Rd1 26.Rd1 Qd1 27.Be3-+) 25.h5 (25.Bg5 Rd7-+) 25...Bc5 (better 25...Qa2 26.Be3-+) 26.h6 (26.Rd8 Rd8 27.Qf3 Rd4-+) 26...g6 (26...Bf2 27.Kh1 Rd1 28.Rd1-+) 27.Rd8 Rd8 28.Qf3 Qc2 (better 28...Rd4 29.Rd1 Rg4 30.Kh2 Rd4 31.Rd4 Bd4-+) 29.Qf6-/+ Rd7 30.Qe6 Rf7 31.Qe8 (31.Be3 Bf8-/+) 31...Bf8 32.Ba3? (32.Qe6!?-/+) 32...Qc4 (32...Qa4 33.Bd6 Qg4 34.Bg3-+) 33.Bf8 (33.Qc8 c5 34.Rc1-+) 33...Rf8?? (33...Qg4 34.Kh2 Qh5 35.Kg1 Qg5 36.Kh1 Rf8 37.Qe6 Kh8 38.Qh3-+) 34.Qe7? (better 34.Qd7 Qf7 35.Qf7 Kf7 36.Rd1-/+) 34...Qg4-+ 35.Kh2 Qh5 36.Kg3 (36.Kg1 Qh6 37.Qe6 Kh8 38.Qe5 Qg7-+) 36...Qh6 (36...Rf3 37.Kg2 Qg4 38.Kh2 Rh3) 37.Qe6-+ Rf7 38.Qc8 (38.f4 Qh5-+) 38...Kg7 39.Qg4 (39.f4 Qh5-+) 39...Qd2 40.a4 Qd3 41.Kg2 Rf5 (better 41...Qd5 42.Kh2 Rf5-+) 42.Qb4 (42.Rd1 Rf4! 43.Qf4 (43.Rd3?? Rg4 44.Kf3 Ra4-+) 43...Qd1 44.Qc7 Kf6 45.Qh7 Qg4 46.Kf1 Qa4 47.Qh8 Kf5 48.Qc8 Ke5 49.Qe8 Kd4 50.Qg6 Qb5 51.Ke1 Qe5 52.Kd1-+) 42...Rg5 (42...Qf3 43.Kh2 Rh5 44.Qh4 Rh4 45.Kg1 Rh1) 43.Kh2-+ Qf1 44.Qe7 Kh6 45.Qf8 Kh5 46.Qf3 Rg4 47.Qh3 (47.a5 h6 48.a6 b6 49.Qg3 Rh4 50.Qh4 Kh4 51.f3 Qf2 52.Kh1 Kg3 53.f4 Qe1) 47...Rh4 48.Qh4 Kh4 49.a5 (49.f3 Qf2 50.Kh1 Kg3 51.f4 Qe1) 49...Qf2 50.Kh1 Kh3 51.a6 Qg2 (51...Qe1) 0-1. jolubolu (1910) - Vax (1755), Rated Classical game, lichess.org, 2013.

6.c3 Nbd7 7.Qa4 Be7 (7...Bd6 8.h3-/+) 8.g3 (8.Nbd2 0-0-/+) 8...0-0 9.Bg2 (9.Nbd2 a5 10.bc5 Nc5-/+) 9...Nb6 (9...a5 10.Qc2 ab4 11.ab4 Ra1 12.Ba1 cb4 13.cb4 Bb4 14.Nbd2-/+) 10.Qd1 (10.Qc2 Nc4-/+) 10...c4 11.Nh4 (11.0-0-/+) 11...Bg6 (better is 11...Bg4!? 12.h3 Bh5-/+) 12.Ng6+= hg6 13.0-0 Rc8 (13...a5 14.Nd2 Qc7 15.Nf3+=) 14.Nd2= Qc7 15.a4 cd3 16.ed3 Rfd8 17.a5 Nbd7 18.Qb3 ½–½. Szlenka,Attila (1760) – Steer,Jozsef (1870), First Saturday FM–B Sep, 2014.

6.c3 Nbd7 7.g3 Bd6 +=.

6.c3 Nbd7 7.g3 Be7 8.Bg2 0-0 9.0-0 cb4 10.ab4 Qb6 11.Nd4 Bg6 12.Qd2 Rfc8 13.Na3 White plans b5 13...a5 14.b5 (14.Nac2!?=) 14...h6 15.f4 Bc5 16.e3 Ne8 (16...e5 17.Ndc2 ef4 18.gf4-/+) 17.Kh1 (17.f5!? Bf5 18.c4-/+) 17...Nd6-/+ 18.c4 Nf6 (18...Bb4!? 19.Qd1 dc4 20.Nc4 Nc4 21.dc4 Rc4+=) 19.cd5+= ed5 20.Rfe1? (20.Nac2 a4+=) 20...Re8 (better is 20...Bb4 21.Qe2 Be1 22.Re1 a4-+) 21.Rac1? (better is 21.Bf3-/+) 21...Bb4-+ (21...Bb4 22.Qe2 Bh5-+) 0–1. carrafurca (2465) – irrawang (2420), net–chess.com, 2015.

6.bc5 Bc5 7.d4 Bd6 8.e3 Qc7 (8...Qb6 9.Ra2-/+) 9.Bd3 (9.c4 dc4 10.Nc3 a6-/+) 9...Ne4 (9...Qb6 10.Ra2=+) 10.h3 (10.Nh4 0-0=+) 10...Nd7-/+ 11.Nbd2 Rc8 12.Nh4? (better 12.0-0!?-/+) 12...Nf2!-+ 13.Kf2 Bg3 14.Ke2 (14.Kg1 Bh4 15.e4 de4 16.Ne4 0-0-+) 14...Bh4 15.Bf5 (15.g4 Bg6-+) 15...ef5 16.Rc1 0-0 17.c4 (17.Qf1 Rfe8 18.Qf5 Nb6-+) 17...Qa5 (better 17...Rfe8!? 18.cd5 Qg3 19.Qg1-+) 18.Nf3 Bg3 19.Qb3? (19.Qd3 Nf6 20.Qf5-+) 19...dc4 20.Rc4 (20.Qb7 c3 21.Bc3 Rc3 22.Rc3 Qc3-+) 20...Qa6 21.Rhc1 Nb6 22.Nd2 Nc4 23.Nc4 (23.Rc4 Rfe8 24.Qd3 Rc4 25.Nc4 f4-+) 23...Qc6 (23...b5!? 24.Nd2 Rc1 25.Bc1-+) 24.Kf1 Rfe8 (better 24...Rc7 25.d5 Qa6 26.d6 Bd6 27.Kf2-+) 25.Ne5 (25.Kg1 Qe4-+) 25...Qa6 26.Kg1 (26.Qd3 Be5 27.Qa6 Rc1 28.Bc1 ba6 29.de5 Re5-+) 26...Rc1 27.Bc1 Be5 (better 27...Re5 28.e4 f4 29.Bf4 Bf4 30.de5 Be5 31.Kf2-+) 28.de5 Re5 29.Bb2 Re6 (29...Qb5 30.Qc3 f6 31.Qd2-+) 30.Qc3 (30.Qd5 h6 31.Bd4 b6 32.Qf5 Qa3-+) 30...f6 31.Kf2 (31.Qc8 Kf7 32.Qc7 Re7-+) 31...Qc6 32.Qb3 (32.Qd3 Qe4 33.Qe4 Re4-+) 32...Kf7 33.Bd4 (33.Qd1 Qe4 34.Qd2 Kg6-+) 33...a6 34.a4 (34.Kg3 Qe4 35.Qb2 b5-+) 34...b5 (34...Qe4!? 35.Qc4-+) 35.ab5 ab5 36.Qa3 (36.g4 fg4 37.hg4 Qc4-+) 36...Qc4 (36...Qc2 37.Kg1 Rc6 38.Qa5 Qb1 39.Kh2-+) 37.Bc5 (37.Qa1 Qc2 38.Kg1 Rc6 39.Qa7 Kg6-+) 37...Rc6 38.Qa7 (38.Bd4 Qd5 39.Qd3-+) 38...Kg6 39.Bf8 Rc7 40.Qa3 f4 (40...Qh4 41.Kg1 Rc2 42.Qa8 Qg3 43.Ba3 b4 44.Bb2 Rb2 45.Qf3 Rb1 46.Qf1 Qe3 47.Kh2 Rf1 48.h4 f4 49.h5 Kg5 50.h6 Qg3) 41.Bd6 (41.Kg1 f3! 42.Qb2 fg2 43.Qb1 Kf7 44.Bd6-+) 41…fe3 (41...fe3 42.Qe3 Qc2 43.Qe2 Qe2 44.Ke2 Rc6-+) 0–1. Kluehs,Gustaf (1680) – Lischeid,Kilian (1715), Lichtenberger Sommer, 2017.

6.bc5 Bc5 7.e3 0-0 8.Nbd2 Nc6 9.Be2 Bg4 10.0-0 Re8 11.c4 e5 12.d4 ed4 13.Nb3 Bb6 14.c5 Bc7 (< 14...de3 15.Bf6 gf6 16.cb6 Qb6 17.Nbd4+/– (17.Qd5? ef2 18.Rf2 Re2-+)) 15.Nbd4 Ne4 16.Nb5 Re6 17.Nc7 Qc7 18.h3 Bf3 19.Bf3 Ne5 20.Be5 Re5 21.Rc1 Rd8 22.Qc2 Ng5 23.Bg4 h5 24.Bd1 Ne6 25.c6 d4 26.cb7 Rc5 27.Qc5 Nc5 28.ed4 Rd4 29.Rc5 Qb7 (29...Qc5 30.b8Q) 30.Bh5 g6 31.Bf3 Qb6 32.Re5 Ra4 33.Re3 Qb2 34.Bd5 Ra3 35.Re8 Kg7 36.Re7 Ra1 37.Rf7 (37.Bf7?? Kf6 38.Re2 Rf1 (38...Qe2?! 39.Ra1 Kf7 40.Ra7 Ke6 41.Ra1-+) 39.Kf1 Qb1 40.Re1 Qb5 41.Re2 Kf7-+) 37...Kh6 38.Bc4 Rf1 39.Bf1 a5 40.Ra7 Qb4 41.Ra6 Qc3 42.g3 Qa1 43.Kg2 Qe5 44.Kg1 Qe1 45.h4 Qd2 46.Kg2 ½–½. Gretencord,Ulrich (1960) – Wagner,Frank, SE075 DESC, 2002.

6.bc5 Bc5 7.e3 Nbd7 8.Nbd2 0-0 9.Be2 Rc8 10.Nh4 Bg6 11.Ng6 hg6 12.0-0 Qe7 13.c4 Nb6? (better is 13...dc4 14.d4 c3 15.Bc3 Nd5+=) 14.d4+- dc4 (better is 14...Nc4 15.Nc4 dc4 16.dc5 Qc5+-) 15.dc5 Qc5 16.Bd4 Qc6 (16...Qd6 17.Bb6 c3 18.Ba5 Qd2 19.Qd2 cd2 20.Rfd1+-) 17.Bb6 Qb6 18.Nc4 (18.Bc4?! Rfd8 19.Qe2 Rd2 20.Qd2 Rc4+-) 18...Qc5 19.Rc1 Rfd8 20.Qe1 Qe7 21.Qb4 Qb4 22.ab4 Nd5 23.b5 Rc5 24.Na3 Rdc8 25.Rc5 Rc5 26.Bc4 Nb6 27.Rc1 Kf8 28.Rc2 Ke7 29.Kf1 Kd6 30.Ke2 Nc4 31.Nc4 Kd5 32.Na3 Rc2 33.Nc2 Kc5 34.Kd3 Kb5 35.f4 Kc5 36.e4 b5 37.g4 a5 38.Kc3 f6 39.h4 g5 40.hg5 fg5 41.f5 e5 42.Ne1+- b4 43.Kd3 a4 44.Nf3 a3 45.Kc2 a2 46.Kb2 b3 47.Ng5?? Kd4+= 48.Ne6 Ke4 49.Ng7?? Kf4 50.f6+- e4 51.f7 e3 52.f8Q Kg4 53.Qf5 Kg3 54.Nh5 Kg2 55.Qg4 Kf1 56.Qf4 Ke2 57.Ng3 Kd3 58.Qe4 (58.Qe4 Kd2 59.Qg2 e2 60.Qe2#) 1–0. Woloszyn,Piotr (1845) – Jaworska,Aleksandra (1650), Najdorf mem op–B Poland, 2007.

6.Qd2 Qb6 7.c4 dc4 8.e4 Bg6 9.bc5 Bc5 10.e5 Nfd7 11.d4 (11.d4 Be7 12.Bc4=+). Pech,Jaroslav – Gounant,Stanislas (2045), FICGS, 2008.

6.Qd2 Nbd7 7.c4 Bd6 8.d4 (better is 8.Nh4!? Bg6 9.cd5 ed5 10.e3=) 8...cb4 9.ab4 dc4 10.e3 0-0 (better is 10...Ne4 11.Qc1 Bb4 12.Nc3 Nb6-+) 11.Na3?? (better is 11.Bc4 Ne4 12.Qe2-/+) 11...Nd5 (11...Ne4 12.Qc2 Bb4 13.Kd1-+) 12.Rc1 (12.Bc3 N7f6 13.Qb2-+) 12...Nb4 (better is 12...Bb4 13.Bc3 Nc3 14.Rc3 Qa5 15.Nc4 Qa1 16.Ke2 Bc3-+) 13.Nc4-/+ Be7 14.Ba3 a5 15.Be2 b5 16.Nce5 Ne5 17.Ne5 Nc2 18.Rc2 Ba3 19.Nc6 Qg5 20.0-0 Be4 21.f3 (21.g3 Bc2 22.Qc2-+) 21...Bc2 22.Qc2 Rac8 (better is 22...Qe3 23.Kh1 b4-+) 23.f4 Qd5 24.Bf3 Qd6 25.Qd3 b4 (25...Rc6?! 26.Bc6 Qc6 27.Qa3-+) 26.Na5 Rc3 27.Qe2 (27.Qb1 Re3 28.Nc4 Qf4 29.Ne3 Qe3 30.Kh1 Qd4-+) 27...Rfc8 (better is 27...Bc1-+) 28.Nb7 Qb6 29.Be4? (better is 29.Nc5 Qd8 30.Bb7-+) 29...f5 30.Bf3 b3 31.g4 (31.Nc5 b2 32.Na4-+) 0–1. Tudor,Ioan – Tudor,Alin Ciprian (2115), Techirghiol op, 1999.

6.e3 =+.

6.g3 0-0 7.Nd4 (7.Bg2 c5=+) 7...Bg6 8.Bg2 Nc6 (8...a5 9.Nb5-/+) 9.e3 (9.Nc6 bc6 10.c4 c5=) 9...a6 (9...Nd4 10.Bd4 a5 11.ba5-/+) 10.Nf3 (10.Nc6 bc6 11.c4 c5=) 10...Bh5=+ 11.Nbd2 (11.c4 a5 12.cd5 ed5=+) 11...Ne5 (11...a5 12.b5 Ne5 13.0-0=+) 12.0-0 c5 (12...b5 13.Nb3=+) 13.Qe1 (13.bc5!? Nf3 14.Bf3 Bf3 15.Qf3 (< 15.Nf3 Bc5 16.Bd4 Rc8=+) 15...Bc5 16.Bf6 Qf6 17.Qf6 gf6 18.d4+=) 13...Nf3=+ 14.Nf3 Bf3 (14...Rc8 15.Qd2=+) 15.Bf3= Rb8 (15...cb4 16.ab4 Qe7 17.Bc3=) 16.c4 (16.e4 d4=) 16...dc4 17.dc4 Qe7 18.Bg2 (18.bc5 Bc5 19.Be5 Bd6 20.Bd6 Qd6=) 18...cb4=+ 19.a4 (19.ab4!? Bb4 20.Bf6 gf6 21.Qe2=) 19...a5 (19...Rfd8 20.Qe2-/+) 20.f3 (20.Qe2 Rfd8-/+) 20...Bc5 (20...Rfd8 21.Qe2-/+) 21.Be5 Rbd8 22.Qe2 Nd7 23.Bf4?? e5 24.Bh6 gh6 25.Rfd1 Nb6 26.f4 ef4 27.gf4 Qe3 28.Qe3 Be3 29.Kf1 Bf4 30.c5 Rd1 31.Rd1 Na4 32.Rc1 Bc1 (33.Ke2 Nc5-+) 0–1. dugmak – Alviss, ChessWorld.net, 2004.

6.g3 c5 7.bc5 Bc5 8.Bg2 =+.

6.g3 Nbd7 7.Bg2 Qe7 8.0-0 0-0-0 (8...0-0 9.Nc3=) 9.Nbd2+= Rdg8 (9...Kb8!?+=) 10.Re1+- e5 (10...Bg4 11.c4 c6 12.Qc2+-) 11.c4 c6 12.cd5 cd5 (12...Nd5?? 13.e4 Nf4 14.ef5 Nd3 15.Nc4 Ne1 16.Nd6 (16.Ne1?! Bc7+-; worse 16.Qe1 Bc7+-) 16...Kc7 17.Qe1 (worse 17.Ne1 Qd6 18.Qb3 f6+-) 17...Qd6 18.Rd1+-) 13.e4 de4 14.de4 Bg4 15.Nc4 Bb8? (better 15...Bc7+-) 16.Rc1 (better 16.Qa4 a6 17.Rac1+-) 16...Kd8? (16...Bc7 17.Nce5 Ne5 18.Be5 Qe5 19.Ne5 Bd1 20.Red1 Rd8 21.Rd8 Rd8 22.Nf7 Rd2+-) 17.Ne3 h5 18.Nd5 (18.Nf5!? Qe6 19.Qc2 Qc6+-) 18...Nd5 (18...Qd6 19.Qd2 Nd5 20.Ng5+- (20.Qd5?! Qd5 21.ed5 f6+-)) 19.Qd5 b6 (19...Qe6 20.Qb7 Qb6 21.Qd5+-) 20.Qb7 Qe6 21.Ng5 (21.Rc6 Qa2 22.Rd1 Ke7 23.Ne5 Be5 24.Be5 A) 24...Bd1?? 25.Bd6 (25.Qa7 Rh6 26.Rc1 Bg4-+) 25...Kf6 26.Qd7+-; B) 24...Rh6 25.Bd6 Rd6 26.Rcd6 Re8 27.Rd7 Bd7+-) 21...Qf6 (21...Qg6 22.h4 Ke7+-) 22.h4 Ke7 23.Rc6 (better 23.f3 Be6 24.Rc6+-) 23...Bd6 24.f3 (better 24.Rec1 a5 25.f4+-) 24...Rb8+= 25.Qa6 Be6?? (better 25...Bc5 26.Rc5 bc5+=) 26.Rd1+- Rbd8 (26...Ba2 27.Bh3 (27.Qa7 Ra8 28.Rdd6 Qd6 29.Rd6 Ra7-/+) 27...Bc5 28.Rc5 Nc5 29.bc5+-) 27.Ne6 (better 27.Rdd6 Rh6 28.Qa7 Ke8+-) 27...fe6 (27...Qe6 28.Rcd6 Qd6 29.Rd6 Kd6+-) 28.Rdd6 (28.Rdd6 Kf7 29.Qa7+-) 1–0. Hegedus,Dominik (1800) – Risteski,Emil, EU–ch U12, 2015.

6.Nh4 Bg6 7.Ng6 fg6 (7...hg6 8.h3=) 8.Nd2 (8.e4 Nbd7+=) 8...e5 9.e4 d4 10.Be2 Nbd7 11.Nc4 Be7 12.0-0 0-0 (12...c5 13.bc5 Qc7 14.c3 Bc5 15.Qb3+=) 13.c3 c5 14.cd4 cd4 15.f4 Nb6? (better is 15...ef4 16.e5 Nd5 17.Bd4 Kh8+/–) 16.fe5 Nc4 17.ef6 Nb2 18.Qb3 Kh8 19.fe7 Qe7 20.Qb2 Rfd8 21.Rac1 a5 22.b5 Rac8 23.Qb3 Rc3 24.Rc3 dc3 25.Qc3 Qg5 26.Rf3 (26...Qb5 27.Rf7 Qb6 28.Kh1+-; better is 26.Qa5!? Qc5 27.Kh1 b6+-) 1–0. mic (2100) – macktheknife (2020), net–chess.com, 2007.

6.c4 dc4 A) 7.dc4 c5 (7...a5 8.Qb3 Be7 9.e3 0-0 10.Be2 ab4 11.ab4 c5 12.Ra8 Qa8+=) 8.Qa4 a5 9.ba5 Bd6 10.Bc3 0-0 11.Nbd2 Bc7 12.Qb5 Ba5+=; B) 7.e4 Bg4 8.e5 c3 9.Bc3 Nd5 10.Bd4 Rc8 11.Be2 Nf4 12.0-0 c5+=.

6.c4 c5 7.cd5 ed5 8.bc5 Bc5 9.e3 0-0 10.Be2 Rc8 11.Nbd2 Bd6 12.Nd4 Bg6 =.

6.Nbd2 a5 7.b5 Bc5 (7...Nc5 8.e3 Bd6 9.Be2 Qe7 10.Nh4 Bg6 11.Ng6 hg6 12.c4 c6=; 7...Bd6 8.e4 de4 9.de4 Ne4 10.Ne4 Be4 11.Nd2 Bg6 12.Bg7 Rg8=; 7...Bg4 8.e4 Bd6 9.h3 Bf3 10.Nf3 e5 11.ed5 Nd5 12.c4 N5f6=) 8.e3 Bd6 9.Be2 e5 10.c4 c6 11.d4 e4 12.Nh4 Be6 =.

6.Nbd2 c5 A) 7.Nh4 cb4 8.Nf5 ef5 9.ab4 Bb4 10.e3 f4 11.ef4 0-0 12.Be2 Qc7-/+; B) 7.Rb1 cb4 (7...Qc7 8.bc5 Bc5 9.Nb3 Be7 10.Nh4 Bg6 11.Ng6 hg6 12.h3 Nb6+=) 8.ab4 Qc7 9.b5 e5 10.c4 dc4 11.Nc4 Bb4 12.Nfd2 Be6+=; C) 7.b5 Qa5 (7...Qb6 8.Rb1 Bd6 9.e4 Bg4 10.Be2 Bf4 11.0-0 0-0 12.h3 Bf3=; 7...Bg4 8.e3 Bd6 9.Be2 a6 10.ba6 Ra6 11.0-0 0-0 12.h3 Bh5+=) 8.Rb1 Bd6 9.Nh4 Be5 10.Nf5 ef5 11.Be5 Ne5 12.e3 Qa3+=; D) 7.bc5 Bc5 (7...Nc5 8.Bf6 Qf6 9.e4 Bg4 10.e5 Qf4 11.d4 Ne4 12.Qb1 b6=) 8.e3 0-0 9.Be2 Bg4 10.0-0 Rc8 11.h3 Bh5 12.Rb1 Nb6=.

6.Nbd2 h6 7.c4 c6 (7...a5 8.c5 Bg6 9.e3 ab4 10.ab4 Ra1 11.Qa1 b6 12.c6 Nb8+=; 7...c5 8.cd5 ed5 9.bc5 Bc5 10.e3 0-0 11.Be2 Bd6 12.Nd4 Bg6=) 8.Qc2 Be7 (8...dc4 9.Nc4 c5 10.e4 Bg4 11.bc5 Bf3 12.gf3 Bc5=) 9.e4 de4 (9...Bg6 10.Be2 a5 11.c5 ab4 12.ab4 Ra1=) 10.de4 (worse is 10.Ne4 a5 11.c5 0-0+= 12.Be2 Nd5=) 10...Bh7 (10...Bg6 11.Bd3 a5 12.c5 ab4+=) 11.Bd3 0-0 (11...a5 12.c5 ab4+=) 12.0-0 a5 (12...c5+=) 13.e5?? (better is 13.c5+/–) 13...Bd3+= 14.Qd3 Nh7 (14...Ne5 15.Ne5 Qd3 16.Nd3 Rfd8=) 15.Qb3 Qc7 16.c5 b6 17.cb6 Nb6 18.Rac1 Nd5 19.b5 c5 20.a4 Qb6 21.Nc4 Qb7 22.Nfd2 (better is 22.Bc3+/–) 22...Nf4+= 23.f3 Ne2 24.Kh1 Nc1 25.Rc1 Rfd8 26.Ne4 Ng5 27.Ned6 Qb8 28.f4 Nh7 29.Qf3 Nf8 30.Rd1 Ra7 31.f5 ef5 32.Qf5 Bd6 33.ed6 Ne6 34.Bc3 Qa8 35.Rf1 Nd4 36.Qc5+= Ne2 37.Bb2 Re8 38.Qc6?? Qd8? 39.Ne5+- f6 40.Qd5 Kh7 41.Nc6 Qa8 42.Qd3 Kh8 43.d7 Rd7 44.Qd7 Nf4 45.b6 Re6 46.b7 Qa6 47.b8Q Kh7 48.Qf4 (48.Qf4 Qb7 49.Qf5 Kg8 50.Qfe6 Kh7 51.Qf5 Kg8 52.Qe8) 1–0. Tatarcik,Vladimir (1910) – Kurochkina,E (1810), WCh–IPCA Open A, 2011.

6.Nbd2 h6 7.e3 a5 (7...c5 8.bc5 Bc5 9.Be2 0-0 10.0-0 Rc8 11.Rb1 Qc7 12.Nb3 Be7=; 7...Bd6 8.e4 de4 9.de4 Ne4 10.Bg7 Rh7 11.Bd4 e5 12.Ne4 Be4=) 8.b5 Bd6 9.e4 de4 10.de4 Ne4 11.Bg7 Rg8 12.Bh6 Qf6=.

6.Nbd2 h6 7.g3 a5 8.b5 Bd6 9.Bg2 Bh7 10.0-0 0-0 11.c4 Nb6 12.a4 Qe7 13.Qc1 c5 14.Be5 (14.bc6 bc6 15.Bf6 gf6+/-) 14...Nbd7 15.Bd6 Qd6 16.Re1 d4 17.Nf1 e5 18.N3d2 Qc7 19.Qc2 Ne8 20.e4 g6 (20...Nd6 21.f4=+) 21.Nf3 f5 (21...Nd6 22.h3=) 22.ef5+= gf5 23.Nh4 (23.Qe2!? e4 24.de4 fe4 25.N3d2+=) 23...Nd6= 24.Nd2 Rae8 25.Re2 Re7 (25...e4 26.de4 Ne5 27.Ree1 fe4 28.Ne4=+) 26.Rae1 Rfe8 27.f4 b6 28.Bc6 Nf7 (28...e4 29.de4 fe4 30.Ne4 Re4 31.Re4 Ne4 32.Be4+=) 29.fe5 (29.Nhf3!?+/-) 29...Nfe5+= 30.Bd5 Kg7 31.Ndf3 (31.Ng2 Bg6+=) 31...Nf6 32.Ne5 Re5 33.Bc6 R8e7 (33...Re2 34.Re2 Re2 35.Qe2+=) 34.Qd2 (34.Ng2 Ng4+=) 34...Ng4 (34...Re2 35.Re2 (35.Qe2?? Re2 36.Re2 f4-+) 35...Re2 36.Qe2+=) 35.Re5 (35.Ng2 Re2 36.Re2 Bg8+=) 35...Re5 (35...Ne5 36.Bd5=) 36.Ng2+= Qe7 37.Re5 Qe5 38.Bf3 Ne3 39.Qe2 Kf6 40.Nf4 Bg6 41.Kf2 (41.Bh5 Be8+/-) 41...Bf7 42.Qd2 (42.h3+=) 42...Qe7 (better 42...Ng4!? 43.Bg4 fg4=) 43.Ng2+/- Qe5 (43...f4 44.Nf4 Kg7 45.Qe2+/-) 44.Ne3 de3 45.Qe3 Qe3 46.Ke3 Ke5 47.Bc6 Bh5 48.h3 (better 48.Kd2!?+=) 48...Bd1=+ 49.Bf3 Ba4 50.Kd2 Kd4 51.Bc6 Bb3 52.Bd7 a4 53.Bf5 a3 54.Kc1 Kc3 55.Kb1 Bc2 56.Ka2 Bd3 57.Bd3 Kd3 58.g4 Kc4 (58...Ke4 59.Ka3 Kf4 60.Kb3-+) 59.h4 (59.Ka3 Kd4 60.Kb2-+) 59...Kd5 60.Ka3 Ke5 61.Kb3 Kf4 62.g5 hg5 63.hg5 Kg5 64.Kc4 Kf4 65.Kd5 Kf5 66.Kc6 c4 67.Kb6 c3 (67...c3 68.Ka5 c2 69.Ka6 c1Q 70.b6 Qc4 71.Ka5 Ke5 72.b7 Qc5 73.Ka6 Qb4 74.b8Q Qb8 75.Ka5 Kd4 76.Ka4 Kc4 77.Ka5 Qb5) 0-1. Valenta,V jr (2145) - Ludvik,Tomas (2330), 30th Czech Rapid G1, 2019.

6.Nbd2 h6 7.Nh4 Bh7 8.e3 a5 9.b5 Bd6 10.Nhf3 0-0 11.Be2 c6 12.bc6 bc6=.

6.e3 a5 A) 7.ba5 Ra5 (7...Bg4 8.h3 Bf3 9.Qf3 Bd6 10.Be2 c6 11.0-0 Qa5 12.c4 dc4+=; 7...Bd6 8.Be2 e5 9.Bc3 0-0 10.0-0 Qe7 11.Nbd2 e4 12.de4 de4=) 8.Nd4 Bg6 9.Be2 Bd6 10.Qd2 c5 11.Nb3 Ra6 12.Nc3 Qb6+=; B) 7.Qd2 Bd6 (7...ab4 8.ab4 Ra1 9.Ba1 Qe7 10.Bc3 e5 11.Be2 Qe6 12.Nh4 Bd6=; 7...Bg4 8.Be2 ab4 9.ab4 Ra1 10.Ba1 Bd6 11.c4 dc4 12.dc4 Ne4=) 8.Nd4 Bg6 9.f4 0-0 10.ba5 Bh5 11.Nc3 e5 12.Nf5 ef4-/+; C) 7.b5 Bg4 (7...Bd6 8.Be2 e5 9.c4 dc4 10.dc4 0-0 11.Nc3 Qe7 12.0-0 e4=) 8.h3 Bf3 9.Qf3 Bd6 10.Be2 c6 11.c4 cb5 12.cd5 ed5+=.

6.e3 Bd6 A) 7.Nd4 Bg6 (7...Bg4 8.f3 Bh5 9.c4 Be5 10.g4 Bg6 11.g5 Nh5 12.f4 Bd4=) 8.Be2 a5 9.b5 e5 10.Nf3 Bf5 11.0-0 0-0 12.c4 dc4+=; B) 7.Be2 a5 (7...c5 8.bc5 Nc5 9.0-0 Bg4 10.Nbd2 0-0 11.c4 Rc8 12.Rc1 Qe7=; 7...Bg4 8.c4 c5 9.bc5 Nc5 10.cd5 ed5 11.0-0 0-0 12.Nc3 Qd7=) 8.b5 e5 9.0-0 0-0 10.c4 dc4 11.dc4 Qe7 12.Nc3 e4=; C) 7.c4 c5 (7...0-0 8.c5 Be7 9.Be2 a5 10.Nh4 ab4 11.Nf5 ef5 12.ab4 Ra1=) 8.bc5 Nc5 9.d4 Ncd7 10.c5 Bc7 11.Bd3 Ba5 12.Nc3 Ne4=.

6.h3 A) 6...a5 7.ba5 (7.g4 Bg6 8.g5 Nh5 9.b5 Bd6 10.e3 0-0 11.Bg2 c6 12.Nc3 Qb6+=; 7.b5 Bd6 8.g4 Bg6 9.Bg2 0-0 10.0-0 c6 11.c4 cb5 12.cb5 Rc8+=) 7...Ra5 (7...Bd6 8.Nh4 0-0 9.e3 Bg6 10.Ng6 fg6 11.Be2 Ra5 12.0-0 Qe7+=; 7...h6 8.e3 Ra5 9.Nd4 Bg6 10.Be2 Bd6 11.Qd2 c5 12.Nb3 Ra8+=; 7...Bg6 8.e3 Bd6 9.Nh4 0-0 10.Ng6 fg6 11.Be2 Ra5 12.0-0 Nc5+=) 8.Nh4 Bg6 9.Ng6 hg6 10.e3 Bd6 11.Be2 Nc5 12.Bc3 Ra8+=; B) 6...c5 B1) 7.c3 Bd6 (7...Bg6 8.Nh4 Bd6 9.Ng6 fg6 10.e4 0-0 11.Qe2 Qb6 12.Nd2 Rac8+=; 7...h6 8.g4 Bg6 9.Nbd2 Bd6 10.bc5 Bc5 11.Qb3 Qb6 12.Qb6 Nb6+=; 7...e5 8.g4 Bg6 9.g5 Nh5 10.Qa4 e4 11.de4 de4 12.Ne5 Bf5=) 8.Nh4 0-0 9.Nf5 ef5 10.g3 Re8 11.Bg2 Qe7 12.Nd2 f4+=; B2) 7.Qd2 Qb6 (7...cb4 8.ab4 Qb6 9.Ra4 a5 10.c3 e5 11.g4 Be6 12.Ng5 Qb5=; 7...Bd6 8.Nh4 Bg6 9.Ng6 hg6 10.Nc3 Qb6 11.Na4 Qb5 12.Nc3 Qc6+=; 7...h6 8.e3 Bd6 9.bc5 Nc5 10.Be2 0-0 11.0-0 Rc8 12.Nd4 Bg6+=) 8.c3 h6 9.g4 Bg6 10.Bg2 Bd6 11.c4 dc4 12.dc4 cb4-/+; B3) 7.g4 Bg6 8.g5 Nh5 9.bc5 Bc5 10.e3 Rc8 11.Be2 0-0 12.Nbd2 Nb6+=; B4) 7.bc5 Bc5 8.e3 Qb6 9.Ra2 Rc8 10.Nbd2 0-0 11.Nh4 Bg6 12.Ng6 fg6=; C) 6...h6 C1) 7.c4 c5 (7...a5 8.b5 Bd6 9.Nbd2 0-0 10.g4 Bg6 11.Bg2 Bf4 12.cd5 ed5=) 8.cd5 ed5 9.bc5 Bc5 10.e3 0-0 11.Be2 Rc8 12.Nbd2 Bd6=; C2) 7.g4 Bg6 (7...Bh7 8.c4 c5 9.cd5 ed5 10.bc5 Bc5 11.Qb3 Rc8 12.e3 Be7+=) 8.e3 c5 9.bc5 Bc5 10.Nbd2 Rc8 11.Be2 Bd6 12.c4 0-0+=; C3) 7.e3 c6 (7...Bd6 8.c4 c5 9.cd5 ed5 10.bc5 Nc5 11.Be2 0-0 12.Nd4 Bg6=; 7...c5 8.bc5 Bc5 9.Be2 0-0 10.0-0 Rc8 11.Nc3 Re8 12.Nb5 Qb6+=; 7...a5 8.b5 Bd6 9.Be2 e5 10.0-0 0-0 11.Nbd2 c6 12.c4 Be6=) 8.Be2 a5 9.Qd2 Bd6 10.Nh4 Bh7 11.0-0 0-0 12.Nf3 ab4+=; C4) 7.Nbd2 c5 (7...a5 8.b5 Bc5 9.e3 0-0 10.Be2 Bd6 11.0-0 e5 12.c4 c6=; 7...Bg6 8.e3 a5 9.b5 Bd6 10.e4 e5 11.ed5 Nd5 12.Nc4 0-0=; 7...c6 8.c4 a5 9.b5 cb5 10.cd5 ed5 11.Nd4 Bg6 12.Nb5 Bc5=) 8.bc5 Bc5 9.Nb3 Be7 10.e3 0-0 11.Be2 Bd6 12.Nfd4 Bg6=; D) 6...Bd6 D1) 7.Nh4 a5 (7...0-0 8.e3 Bg6 9.Ng6 fg6 10.c4 c5 11.cd5 Nd5 12.Qg4 Rf5=; 7...Bg6 8.Ng6 fg6 9.e4 0-0 10.Qe2 Be5 11.d4 Ne4 12.de5 Rf2+=; 7...Qe7 8.Nd2 0-0 9.c4 c5 10.bc5 Nc5 11.Rc1 Rac8 12.Qc2 Na6=) 8.ba5 0-0 9.e3 Ra5 10.Nf5 ef5 11.g3 Re8 12.Be2 Qe7+=; D2) 7.g4 Bg6 8.h4 h6 9.Bg2 Ng4 10.Bg7 Rg8 11.Bb2 Nge5 12.Rg1 Nf3-/+; D3) 7.Nc3 a5 (7...Bg6 8.Nb5 Be7 9.Ne5 a5 10.Ng6 hg6 11.Qd2 c6 12.Nd4 ab4+=; 7...e5 8.Nb5 d4 9.e3 de3 10.fe3 Qe7 11.Nd6 Qd6 12.e4 Be6=; 7...0-0 8.Nb5 Be7 9.Nbd4 Bg6 10.Nh4 Bh5 11.g4 Ne8 12.Ng2 Bg6=) 8.g4 Bg6 9.g5 Nh5 10.b5 Ne5 11.e4 Nf4 12.Nd5 Nf3-/+; D4) 7.c4 c6 (7...0-0 8.c5 Be7 9.Nd4 Qe8 10.Nf5 ef5 11.Qc1 Bd8 12.c6 bc6=; 7...Bg6 8.c5 Be7 9.e3 a5 10.Nh4 0-0 11.Ng6 fg6 12.Be2 ab4=; 7...c5 8.g4 Bg6 9.g5 Nh5 10.cd5 ed5 11.Qb3 Qe7 12.e3 0-0+=) 8.c5 Bc7 9.g4 Bg6 10.Bg2 e5 11.0-0 Qe7 12.Nc3 d4+=.

6.Nh4 Bg4 7.h3 Bh5 8.g4 Ng8 9.Nf3 Bg6 10.Bg2 a5 11.b5 Ngf6 12.Nbd2 Bd6 =.

6.Nh4 Bg6 A) 7.c4 Bh5 (7...Bd6 8.Ng6 hg6 9.h3 dc4 10.dc4 Be5 11.Nc3 Qe7 12.Qa4 a6=; 7...dc4 8.Ng6 hg6 9.dc4 c5 10.Qa4 Qb6 11.e3 Bd6 12.Nd2 0-0-0=; 7...a5 8.Ng6 hg6 9.cd5 ed5 10.b5 Bd6 11.h3 Qe7 12.e3 c6=) 8.cd5 Nd5 9.Nf3 Bf3 10.gf3 Qh4 11.Nd2 Ne3 12.Qc1 c5+=; B) 7.Nd2 Bd6 (7...c5 8.Ng6 hg6 9.bc5 Bc5 10.e3 Qa5 11.g4 g5 12.c4 Bd6+=; 7...Bh5 8.h3 c5 9.g4 Bg6 10.bc5 Bc5 11.Ng6 fg6 12.d4 Qb6=) 8.Ng6 hg6 9.c4 a5 10.ba5 Ra5 11.e3 Qa8 12.Qc1 g5+=; C) 7.h3 c5 (7...Bd6 8.Ng6 fg6 9.e4 0-0 10.Qe2 Be5 11.d4 Ne4 12.de5 Rf2+=7) 8.Ng6 hg6 9.bc5 Bc5 10.e3 Qb6 11.Bf6 Nf6 12.d4 Bd6=; D) 7.Ng6 hg6 8.c4 Bd6 9.h3 dc4 10.dc4 Be5 11.Nc3 Qe7 12.Qa4 a6=.

7.Bc3 Bg4 (7...Bd6 8.bc5 Nc5 9.d4 Ncd7 10.Bb4 Bc7 11.c4 a5 12.Bd2 Rc8+=; 7...cb4 8.ab4 Qb6 9.Ra4 Bd6 10.Be2 e5 11.0-0 0-0 12.d4 e4+=; 7...Be7 8.Be2 Bg4 9.0-0 0-0 10.bc5 Bc5 11.d4 Bf3 12.Bf3 Be7=) 8.h3 Bf3 9.Qf3 Rc8 10.Be2 cb4 11.Bb4 Rc2 12.0-0 Ne5-/+.

7.bc5 Qa5 8.Bc3 Qc5 9.Be2 Qc7 10.Nh4 Bg6 11.Bb4 Rc8 12.c3 a6=.

7.bc5 Bc5 8.Nbd2 Rc8 9.Be2 0-0 10.0-0 Bd6 11.Nd4 Bb8 12.Nf5 ef5 13.Nf3 Qc7 14.Rc1 Ng4 15.g3 Qb6 16.Bd4 Qh6 17.h4 Nde5 18.Ne5 Ne5 19.Kg2 Rfe8 20.Bf3 Nc6 21.Bb2 Qd6 22.c4 dc4 23.Rc4 Re3 24.Qc1 Rd3 25.Qg5 f6 26.Qf5 Rd8 27.Rfc1 Rd2 28.R4c2 Qg3 0–1. Lorinzci,Pedro – Coto,Maximino, Asturia, 1998.

7.bc5 Bc5 8.Be2 Qb6 9.Ra2 0-0 10.Nbd2 Bg4 11.c4 Qc7 12.0-0 Bd6 =.

7.bc5 Nc5 8.Be2 Bd6 9.0-0 Bg4 10.Nbd2 0-0 11.c4 Rc8 12.Rc1 Qe7 =.

6.Nc3 0-0 7.h3 h5 (7...a5 8.b5 Nbd7 9.g4 Bg6 10.Qd2 Nc5 11.Bg2 Qd6 12.Qe3 h6) 8.e3 c5 9.bc5 Bc5 10.Be2 Nc6 11.0-0 Qe7 12.Nh4 Bh7.

6.g3 0-0 7.Nbd2 a5 8.Nd4 Nbd7 9.b5 Bg6 10.Bh3 Nc5 11.N2f3 Bd6 12.0-0 Na4.

6.g3 0-0 7.Bg2 c5 8.c3 (8.Nc3 cb4 9.ab4 Bb4 10.Nd4 Qc7 11.Qd2 Rc8 12.g4 Bg4) 8...Nbd7 (8...Nc6 9.Nbd2 Qb6 10.Nh4 Bg6 11.Ng6 fg6 12.0-0 a5) 9.0-0 (9.Nbd2 Qc7 10.0-0 h6 11.Re1 Rfd8 12.bc5 Nc5) 9...h6 (9...a5 10.Nbd2 ab4 11.ab4 cb4 12.Ra8 Qa8) 10.Nbd2 a5 (10...Qc7 11.Re1 Rfd8 12.Qc2 Ng4) 11.b5 (11.bc5 Nc5 12.c4 Ra6) 11...a4 (11...Qb6 12.c4 d4) 12.c4 Nb6 (12...Qc7=) 13.Re1 dc4 14.e4 Bg4 15.dc4 Qc8 16.Qc2 Bf3 17.Nf3 Nfd7 18.e5 Rd8 19.Rad1 Nf8 20.Rd8 Qd8 21.Nd2 Qc7 22.Qe4 Ra7 23.Qg4 Qd8 24.Ne4 Nh7? (24...Qd3 25.Rc1 A) 25...Nc4? 26.Nf6 Bf6 27.ef6+- (27.Qc4 Qc4 28.Rc4 Be7+=); B) 25...Ng6+=) 25.Rd1+- Qf8 26.Nd6 Bd6 27.ed6 Nd7 28.b6 (better is 28.f4+/–) 28...Nhf6?? (better is 28...Ra6=) 29.Bf6+- Nf6 (29...Ra6 30.Be7 Qc8+-) 30.ba7 Ng4 31.Bb7 (31.Bb7 Qd8 32.a8Q Qa8 33.Ba8+-) 1–0. Valenta,Vit jr (2200) – Dlauchy,P (1995), Palace Hotel Open, Heviz HUN, 2008.

6.h3 A) 6...Bg6 A1) 7.Nc3 0-0 (7...a5 8.b5 0-0 9.e3 Qd6 10.Be2 Nbd7 11.Nh4 Ne5 12.Ng6 Ng6) 8.e3 c5 9.bc5 Qa5 10.Be2 Nc6 11.0-0 Bc5 12.Qd2 h6; A2) 7.Nbd2 a5 (7...0-0 8.Nh4 a5 9.Ng6 hg6 10.b5 c6 11.Rb1 cb5 12.Bf6 Bf6; 7...Nbd7 8.Nh4 c5 9.bc5 Bc5 10.e3 0-0 11.Be2 Bd6 12.0-0 Qc7) 8.Ne5 0-0 9.ba5 Qd6 10.Ndf3 Nc6 11.Nc6 Qc6 12.Qd2 Qa4; A3) 7.Ne5 a5 (7...Nbd7 8.Ng6 hg6 9.Nd2 c5 10.bc5 Nc5 11.Nf3 Bd6 12.Qd2 Qc7; 7...0-0 8.Nd2 a5 9.b5 Nbd7 10.Ng6 hg6 11.Nf3 Nc5 12.Bd4 Bd6) 8.Nd2 0-0 9.b5 Nbd7 10.Ng6 fg6 11.Nf3 Bd6 12.Qd2 Nc5; A4) 7.e3 a5 8.b5 0-0 9.Nc3 Qd6 10.Be2 Nbd7 11.0-0 h6 12.Qd2 Nc5; B) 6...Nbd7 B1) 7.Nbd2 0-0 (7...Bg6 8.Nh4 c5 9.bc5 Nc5 10.Ndf3 Qc7 11.Qd2 Bd6 12.g3 0-0; 7...c5 8.e4 Bg6 9.ed5 ed5 10.Be2 cb4 11.0-0 0-0 12.ab4 Bb4; 7...a5 8.g4 Bg6 9.Bg2 ab4 10.g5 Nh5 11.ab4 Bb4 12.Rg1 Ra1) 8.g4 Bg6 9.Nb3 c5 10.bc5 Nc5 11.Bg2 Nb3 12.cb3 Rc8; B2) 7.Qd2 a5 8.g4 Bg6 9.b5 0-0 10.Nc3 Nc5 11.Bg2 h6 12.0-0 Qd6; B3) 7.g4 Bg6 8.Nbd2 a5 9.Bc3 0-0 10.Bg2 Nb6 11.b5 Na4 12.Bd4 Qd6; C) 6...a5 C1) 7.g4 Bg6 8.Nbd2 0-0 9.b5 Nbd7 10.Bg2 h6 11.Nb3 c6 12.bc6 bc6; C2) 7.b5 0-0 (7...Nbd7 8.g4 Bg6 9.Bd4 Bc5 10.Nc3 Bd4 11.Nd4 e5 12.Nb3 a4) 8.g4 Bg6 9.Nbd2 Nbd7 10.Bg2 h6 11.Nb3 c6 12.bc6 bc6; C3) 7.Nbd2 Nbd7 (7...Bg6 8.g4 0-0 9.b5 Nbd7 10.Bg2 h6 11.0-0 c6 12.bc6 bc6; 7...0-0 8.g4 Bg6 9.b5 Nbd7 10.Bg2 h6 11.Nb3 c6 12.bc6 bc6) 8.g4 Bg6 9.Bc3 0-0 10.Bg2 Nb6 11.b5 h6 12.a4 Bb4; D) 6...0-0 D1) 7.Nc3 Nc6 (7...Bg6 8.e3 Nbd7 9.Be2 c5 10.bc5 Nc5 11.0-0 a6 12.Nh4 Qc7; 7...h5 8.g4 hg4 9.hg4 Bg4 10.Ne5 Nc6 11.Ng4 Ng4 12.e4 Nce5; 7...a5 8.g4 Bg6 9.b5 Nbd7 10.Bg2 Nc5 11.Qd2 Qd6 12.Qe3 h6) 8.g4 Bg6 9.b5 Na5 10.g5 Nh5 11.Qd2 a6 12.Nd5 ed5; D2) 7.g4 Bg6 8.g5 Nh5 9.Nc3 a5 10.h4 Nd7 11.b5 Nc5 12.e3 f6.

6.Nh4 Bg6 =.

6.Nbd2 a5 7.b5= a4 8.g3 Bc5 9.Bg2 0-0 10.0-0 c6 11.bc6 bc6 12.Ne5 Qe7 13.Ndf3 Bh7 (13...Rd8 14.c4=) 14.c4 Rc8 (14...Bf5 15.Nd4=) 15.Ra2 Ne8 (15...Bf5 16.Nd4+=) 16.d4+= Bb6 17.c5 Bd8 (17...Bc7 18.Qd2=) 18.Bc3+= Rc7 (18...f6 19.Nd3+=) 19.Rb2 Rb7 20.Nd3 (20.Rb7 Qb7 21.Bd2 Be4+=) 20...Qc7 21.Nfe5 Nd7 22.Nb4 (22.Nd7!? Qd7 23.Ne5+=) 22...Ne5= 23.de5 Be7 24.Bd4 Rb5 25.Qc1 Raa5 (The pressure on the isolated pawn grows) 26.Qe3 Qb7 (26...Bc5 27.Bc5 Rc5 28.Nd3-/+) ½–½. Marschner,Juergen (2300) – Hargens,Thomas (2275), BL2–N, 1992.

6.Nbd2 Bd6 7.e4 Bg4 8.e5 Be5 9.Be5 +-.

6.Nbd2 Be7 7.g3 0-0 8.Bg2 c6 9.0-0 a5 10.c3 Bh7 11.Nb3 b6 12.Nfd2 c5 13.ba5 ba5 14.a4 Nbd7 15.e4 (15.c4 Qc7=) 15...Rb8 16.Re1? (better 16.c4!? d4 17.f4=) 16...Ne5-/+ 17.Qc2 Nd3! 18.Qd3 c4 19.Qd4 cb3 (worse 19...Rb3 20.Nb3 cb3 21.ed5 Nd5 22.c4=) 20.ed5 Nd5 21.Ne4 Be4 (21...Nb6 22.Qe3-+) 22.Qe4 Bf6 23.Rac1 Qb6 24.Qe2 Rfd8 25.Be4 (25.Red1 Ne7-/+) 25...Rbc8 26.Qf3 (26.c4!? Bb2 27.Qb2 Nf6-+) 26...Rc4 27.Red1 Ra4 28.Bb1 (28.h4 Qc6-+) 28...Rc8 29.Rd3 (29.Bh7 Kh7 30.Rd5 ed5 31.Qf5 g6 32.Qc8 Ra2-+) 29...Rac4 30.Rcd1 a4 (30...Qc6 31.Qh5-+) 31.h4 (31.R3d2 Qc6 (31...Bc3?! 32.Bc3 Rc3 33.Qe4-+) 32.Be4 Bc3 33.Bc3 Rc3-+ (33...Nc3 34.Bc6 R8c6 35.Rd8 Kh7 36.Qf7+-)) 31...Qa5 32.Rd5 ed5 33.Rd5 (33.Qf5 Bc3 34.Qh7 Kf8 35.Ba3 Bb4 36.Qh8 Ke7 37.Qg7 Ba3 38.Qe5 Kd8 39.Rd5 Qd5 40.Qd5 Ke8 41.Qe5 Be7 42.Qh8 Bf8 43.Qe5 Kd8 44.Qd5 Ke7 45.Qe5 Kd8 46.Qd5 Ke7 47.Qe5 Kd8=) 33...Qb6 (33...R4c5 34.Bh7 Kh8 35.Rc5 Qc5 36.Bb1-+) 34.Qd3 (34.Bf5 Re8 35.Kg2 Qc7-+) 34...g6 (34...Bc3?! 35.Qh7 Kf8 36.Rd7-+) 35.h5 Bg7 (35...Bc3 36.Ba3 Bb4 37.Bb4 Rb4 38.hg6-+) 36.hg6 fg6 37.Rd6 R4c6 38.Qd5 Kh8 39.Rd7 Rf8 (39...Re6 40.Qd2 Rc7 41.Rd5-+) 40.Qd2 Rc7 41.Rd6 Qa7 (41...Rf2 42.Qd3 (42.Rb6?? Rd2 43.Bg6 Rb2 44.Rb8 Bf8 45.Rf8 Kg7-+) 42...Qc5 43.Ba3-+) 42.Rg6 Rcf7?? (42...Rd7 43.Rh6 Bh6 44.Qh6 Kg8 45.Qe6 Rdf7 46.Bf5-+) 43.Rh6?? (43.c4 Kg8 44.Bf5 Rf5 45.Bg7 Qg7 46.Qh6=) 43...Bh6-+ 44.Qh6 Kg8 45.Qg6 Rg7 46.Qe6 Qf7 47.Qe2 Re8 48.Qf1 Qe6 49.Kg2 (49.Bd3 Qe1 50.Bc4 Kh7 51.Bd3 Kh6 52.Kg2-+) 49...Qe2 50.Qc1 (50.Qe2 Re2 51.Ba3 Rf7-+) 50...Rf8 (50...Rd8 51.Qf4 Qb2 52.Qc4 Rf7 53.Qg4 Kf8 54.Qb4 Kg7 55.Qg4 Kf6 56.Qf5 Ke7 57.Qe5 Kd7 58.Qd5 Ke8 59.Qe5 Re7 60.Bg6 Kd7 61.Bf5 Ke8 62.Bg6 Kd7 63.Bf5 Ke8 64.Bg6=) 51.Qe3 Qe3 (51...Qb2?! 52.Qe6 Rgf7 53.Qg6 Kh8 54.Qh6 Kg8 55.Qg6 Rg7 56.Qe6 Kh8 57.Qh6 Kg8 58.Qe6=) 52.fe3 Rd7 53.Ba3 Rd2 54.Kh3 Ra2! (54...Ra2 55.Be7 Rc8-+) 0-1. Valenta,V jr (2050) - Babula,Vlastimil (2135), 45th Vsetin Open, 2020.

6.Nd4 Bg6 7.Nd2 Nbd7 8.e3 c5 9.bc5 Bc5 10.N4b3 Bd6 11.g3 (11.c4 Rc8=+) 11...0-0 12.Bg2 a6 13.0-0 Rc8 14.Nf3 Qc7 15.Rc1 Qb6 (15...b5 16.Nfd2=+) 16.Qd2 Rc7 17.Qa5 (17.Nh4 Bh5=+) 17...Rfc8 (17...Qa5 18.Na5 Rfc8 19.Ne1-/+) 18.Qb6=+ Nb6 19.c3?? (better 19.Ne1-/+) 19...Na4-+ 20.Ba1 Ba3 21.Nbd4 (21.Rc2 Bd6 22.Ne1-+) 21...Bc1 22.Rc1 Bd3 23.Ne1 Be4 24.f3 Bg6 25.Bf1 (25.Ne2 Nb6-+) 25...Nc3 26.Bc3 Rc3 27.Rb1 (27.Rc3 Rc3 28.Kf2 e5-+) 27...b5 (better 27...Bb1 28.Kf2 b5-+) 28.Ra1 Re3 (28...e5 29.Ne2 Re3 30.Kf2-+) 29.Ng2 (29.Kf2 Rec3 30.Ra6 b4-+) 29...Rec3 30.Ra6 b4 31.Ne2 (31.Nh4 Kh7 32.Ng6 Kg6-+) 31...Rc2 (31...Rf3 32.Rb6 Rb3 33.Ngf4-+) 32.Ne3 (32.Nd4 Rc1 33.Nf4 e5 34.Ng6 fg6-+) 32...Rb2 33.Rb6 (33.Nd4 b3 34.Rb6 e5-+) 33...Bd3 34.Nd4 Bf1 35.Kf1 (35.Nf1 Rc1 36.Rc6-+) 35…Rc1 (35...Rc1 36.Nd1 Rd1) 0–1. mark19116 (1825) – amirgloo (1890), lichess.org, 2021.

6.e3 Be7 7.Be2 0-0 8.0-0 c5 9.bc5 Bc5 10.d4 Bd6 11.c4 dc4 12.Bc4 Nc6 13.Nbd2 Rc8 14.e4? (better is 14.Rc1!?+=) 14...Ne4-/+ 15.Ne4 Be4 16.Nd2 Bd5 17.Bd5 ed5 18.f4 Re8 19.Rf3 Qf6 20.Nf1 Na5 (20...Bf4?! 21.g3 Re4 22.Rf4 Rf4 23.gf4 Qf4 24.Rc1=) 21.Bc1 Re4 22.f5 (22.Rb1-+) 22...Rd4 (22...Qd4?! 23.Be3 Qd1 24.Rd1-+) 23.Bb2 Rd1 24.Bf6 Ra1 (24...gf6?! 25.Rd1 Nc4 26.Rd5 Ba3 27.Kf2=) 25.Ba1 Rc1 26.Bd4 Nc4 27.Be3 (27.Rd3-+) 27...Ne3 28.Re3 Bc5 29.Kf2 Rf1! (29...Rf1 30.Kf1 Be3-+) 0–1. Goncharov,Vladislav – Kononenko,Dmitry (2455), Kiev Independence Cup–A 4th, 2004. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 Bf5 4.d3 e6)

6.a4 Bb4 7.Nbd2 c6 (7...Nbd7 8.ba6 Ra6 9.e4 Bg6 10.e5 Ng4 11.Be2 0-0 12.0-0 Bf5=; 7...0-0 8.e3 ab5 9.ab5 Ra1 10.Qa1 Nbd7 11.Be2 Bg4 12.Bc3 Bd6=; 7...Bg4 8.e3 ab5 9.ab5 Ra1 10.Ba1 c6 11.bc6 Nc6 12.Be2 0-0+=) 8.Nh4 Bg6 9.Ng6 hg6 10.c3 Bd6 11.bc6 Nc6 12.h3 g5 +=.

6.a4 ab5 7.ab5 Ra1 8.Ba1 Bb4 9.c3 Bd6 10.e3 0-0 11.Be2 e5 12.0-0 Qe7 +=.

6.a4 Nbd7 7.Nh4 (7.Nbd2 Bd6 (7...Bb4 8.ba6 Ra6 9.e4 Bg6 10.e5 Ng4 11.h3 Nh6 12.c3 Be7+=) 8.e4 de4 9.de4 Be4 10.Ne4 Ne4 11.Bg7 Rg8 12.Bd4 Bb4+=; 7.e3 ab5 (7...Bd6 8.Be2 e5 9.0-0 0-0 10.Nbd2 Qe7 11.ba6 ba6 12.Rb1 Rab8+=; 7...Bb4 8.Nbd2 ab5 9.ab5 Ra1 10.Qa1 0-0 11.Be2 Bg4 12.c3 Bd6=) 8.ab5 Ra1 9.Ba1 Bd6 10.Be2 e5 11.0-0 0-0 12.c4 dc4+=; 7.ba6 ba6 (7...Ra6 8.Nbd2 Bd6 9.e4 Bg4 10.Be2 Bf3 11.Nf3 Bb4 12.c3 Bd6=) 8.Nd4 Bg6 9.Nc6 Qc8 10.Bc3 Qb7 11.Ne5 Ne5 12.Be5 Bd6+=) 7...ab5 (7...Bg6 8.Ng6 hg6 9.e3+= Bd6 10.h3 e5 11.d4 ab5 12.ab5 Ra1=; 7...Bb4 8.c3 Bd6 9.Nf5 ef5 10.e3 0-0 11.Be2 f4 12.ef4 ab5=) 8.Nf5 ef5 9.ab5 Ra1 10.Ba1 Qa8 (10...f4 11.g3 Qa8 12.Nd2 Qa5=) 11.Nd2 Qa5 12.c4? (12.e3!?+= Bb4+=) 12...Bb4 (12...dc4 13.Qc1 Bb4 14.Bf6 Nf6 15.e3-+) 13.Bb2 (13.Bf6!? Nf6 14.cd5 Nd5 15.Qc1-+) 13...dc4-+ 14.dc4 0-0 15.f3 Rd8 16.e3 (better is 16.Bc1-+) 16...Nc5 17.Bc1 Qa2 0–1. Langschmidt,Dirk (2100) – Peetoom,Frank (1740), RSLE–2010, 2010. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Bf5 4.d3 e6)

6.a4 Bg4 A) 7.e3 ab5 (7...Bb4 8.c3 Bd6 9.Be2 0-0 10.0-0 Nbd7 11.c4 ab5 12.cb5 e5=; 7...c6 8.Nbd2 Bb4 9.Be2 0-0 10.bc6 Nc6 11.0-0 Rc8 12.Rb1 b6=; 7...Bd6 8.Be2 Nbd7 9.0-0 0-0 10.h3 Bh5 11.Nbd2 e5 12.c4 e4=; 7...Nbd7 8.Be2 Bd6 9.0-0 e5 10.c4 0-0 11.Nc3 dc4 12.dc4 Nc5=) 8.ab5 Ra1 9.Ba1 Bb4 10.Bc3 Bc3 11.Nc3 Bf3 12.Qf3 c5+=; B) 7.Nbd2 Nbd7 (7...Bb4 8.e3 ab5 9.ab5 Ra1 10.Ba1 c6 11.bc6 Nc6 12.Be2 0-0+=; 7...Bd6 8.e4 Bb4 9.c3 Bd6 10.Be2 Bf4 11.ed5 ed5 12.Nd4 Bd7=) 8.e4 de4 9.de4 Bb4 10.c3 Bd6 11.ba6 ba6 12.h3 Bh5+=.

6.ba6 A) 6...Ra6 A1) 7.e3 Rb6 (7...Nbd7 8.Be2 Bb4 9.Nbd2 Bg4 10.a3 Be7 11.h3 Bf3 12.Nf3 Qa8+=; 7...Bb4 8.Nbd2 0-0 9.Be2 Nbd7 10.a3 Be7 11.Nh4 Qa8 12.Nf5 ef5=; 7...Nc6 8.Be2 Bg4 9.0-0 Bd6 10.Nc3 0-0 11.Nb5 e5 12.d4 Bf3=; 7...Bg4 8.h3 Bf3 9.Qf3 Nbd7 10.d4 Rb6 11.Bc3 Bd6 12.Bd3 e5+=; 7...Be7 8.Be2 Bg4 9.h3 Bf3 10.Bf3 0-0 11.0-0 Nc6 12.Nd2 Ba3=) 8.Bc3 Bd6 9.Be2 Bg4 10.h3 Bf3 11.Bf3 0-0 12.Nd2 Nbd7+=; A2) 7.Nbd2 Bg4 (7...Ba3 8.Rb1 Be7 9.e4 Bg4 10.Bf6 Bf6 11.d4 Ra2 12.e5 Bg5=) 8.Ne5 Ba3 9.Ba3 Ra3 10.Qb1 Ra7 11.Qb4 Bh5 12.d4 Nbd7=; B) 6...Na6 B1) 7.Nbd2 Bd6 (7...Nc5 8.e3 Na4 9.Bd4 c5 10.Be5 Nd7 11.Qb1 Ne5 12.Ne5 Qc7+=; 7...Bb4 8.e3 0-0 9.Be2 Bg4 10.0-0 Bd6 11.e4 Bf4 12.Re1 de4+=; 7...Bc5 8.Rb1 Bg4 9.e3 Bb4 10.Be5 Bf3 11.Qf3 Bd2 12.Kd2 Nc5=; 7...Bg4 8.Ne5 Bh5 9.h3 Bb4 10.g4 Bg6 11.h4 h6 12.Bg2 Nc5=) 8.e4 de4 9.de4 Ne4 10.Bg7 Rg8 11.Bb2 Nb4 12.Nd4 Bg4-/+; B2) 7.e3 Be7 (7...Bg4 8.Be2 Bb4 9.Nc3 0-0 10.0-0 c6 11.Ne5 Bf5 12.Nf3 Re8=; 7...Bb4 8.c3 Bd6 9.Be2 e5 10.0-0 Qe7 11.c4 e4 12.Ne1 0-0+=; 7...Bd6 8.Be2 Bg4 9.0-0 0-0 10.Ne5 Be2 11.Qe2 Be5 12.Be5 Nd7=; 7...Bc5 8.Be2 0-0 9.Nh4 Bg6 10.0-0 Nb4 11.Ng6 fg6 12.a3 Nc6=) 8.Be2 Bg4 9.0-0 0-0 10.Ne5 Be2 11.Qe2 Nd7 12.e4 Ne5+=.

6.Nc3 =+.

5.a3 a6 6.h4 (6.e3 Nbd7=) 6...h6 7.e3 Nbd7 8.Nc3 e5 9.Nf3 b5 (9...c6 10.d4 Bd6 11.h5-/+) 10.a4 (better 10.Be2=) 10...c5?? (better 10...c6!? 11.ab5 ab5 12.Nb5 cb5 13.Bb5 Rb8-/+) 11.ab5 (11.bc5 b4 12.Nd5 Nd5 13.c6=) 11...cb4= 12.Na2 ab5 13.Bb5 b3 (better 13...Qb6!? 14.Bd7 Nd7 15.Ne5 Ne5 16.Be5 f6=) 14.cb3+- e4 (14...Bh5!? 15.Be5 Be7 16.Bf6 Bf6+-) 15.Ne5+- Bd6 16.Ng6 (better 16.Nd7 Nd7 17.Bg7+-) 16...fg6+= 17.Bd7 Qd7 18.Bf6 gf6 19.Nc3 Be5 1–0. beatmeeasy (1905) – FTorresFerreira (1905), lichess.org, 2020.

5.d3 e5-+ 6.Nf3 e4 7.Nd4 (7.de4 de4 8.Qd8 Kd8-/+) 7...Bd6 (7...Bb4 8.Nd2-+) 8.a3 Nbd7 9.Nb5 0-0 (9...Be7 10.de4 c6 11.Nd4 Ne4 12.e3-/+) 10.Nd6=+ cd6 11.h4 (11.de4 Ne4 12.Qd4 Ndf6=+) 11...Re8 12.e3 Bh5 13.Be2 ed3 14.Bh5 dc2 15.Bf7 Kf7 16.Qc2 Rc8 17.Qb3 Nb6 18.Nd2 Ne4 19.Ne4 Re4 20.g3 Nc4 21.Bd4?? (21.0-0 Qd7=) 21...Qe7 (better 21...Rd4 22.Rd1 Rd1 23.Qd1 Nb6-+) 22.0-0= Qd7 23.Kg2 (23.Ba7 b6 24.Qd3 Kf8 25.Qd5 Re5=+) 23...Rce8 24.Rac1 (24.Qd3+=) 24...Qb5?? (better 24...Rh4! 25.Rh1 Rh1 26.Rh1 Qe6=+) 25.Rc2 (25.Qc3!?+-) 25...Kg8 26.a4 (worse 26.Ba7 b6 27.Rd1 Qc6-/+) 26...Qd7 27.Ba7 (27.Rfc1!?+=) 27...b6=+ 28.Qd3 (28.Bb6 Nb6 29.a5 Nc4=+) 28...R8e5 (better 28...Qa7 29.Qd5 Qf7-/+) 29.Rc4?? (29.Bb6 Nb6 30.a5 Nc4=+) 29...Rc4 (better 29...dc4 30.Qc3 Qa7-+) 30.Bb6? (30.f4 Rh5 31.f5 Qa7 32.Qd5 Qf7 33.Qa8 Qf8 34.Qd5 Qf7 35.Qa8 Qf8 36.Qd5 Qf7=) 30...Rb4 (better 30...Rh4! 31.f4 Qh3 32.Kf2 Qh2 33.Ke1 Qg3 34.Kd1 Qg4 35.Kc1 Re8 36.Qd5 Kh8-/+) 31.Bd4= Re8 (better 31...Rh5!?=) 32.a5+- Rc4 33.Bb6?? (better 33.a6+-) 33...Qc6= 34.f3 Kh8 35.g4 Qa4 (35...Rc3!? 36.Qf5 Rc2 37.Rf2 Rf2 38.Kf2 Kg8=) 36.Kg3 (36.Qd5 Qa2 37.Kh3 Qe2+-) 36...Qc6 (36...Qa2 37.Qb1 (37.Qd5?? Rg4 38.fg4 Qd5-+) 37...Qa4 38.h5+=) 37.Rb1 (37.Rd1 d4 38.Bd4 Rf8+-) 37...Ra4 (37...Rf8 38.Bd4 Qa6 39.Qd2+-) 38.Rd1 (better 38.Qb5 Qb5 39.Rb5+-) 38...Ra3?? (better 38...d4=) 39.Qd5 (better 39.Qa3 Rc8 40.Qd3+-) 39...Qc2 40.Qd6?? (better 40.Qd2 Qd2 41.Rd2+-) 40...Rae3?? (better 40...Ra2 41.Rd2 Qd2 42.Qd2 Rd2-+) 41.Be3+- h6 (41...Qb3 42.Bd4 Qe6 43.Bc3 Qd6 44.Rd6+-) 42.Rd2 (42.Rc1 Qb3 43.Bd4 Qe6 44.Qe6 Re6+-) 42...Qc1 (42...Qc8 43.Bc5 Re6 44.Qd8 Qd8 45.Rd8 Kh7 46.Rd6+-) 43.Bb6 (43.a6 Kh7 44.Qh6 gh6 45.Rd7 Kg6 46.h5 Kf6 47.Bc1 Re2 48.Bh6 Ke6+-) 43...Qe1 (43...Qc4 44.Bd4 Qe6 45.Qe6 Re6 46.Rb2+-) 44.Kg2 1–0. beatmeeasy (1885) – vinaysreenath (1850), lichess.org, 2020.

5.e3 e5 6.Nf3 d4 (better 6...e4 7.Ne5 Bb4=+) 7.Ne5= de3 8.fe3 Nbd7 9.Ng6 hg6 10.Bc4 (better 10.a3+=) 10...Ne5?? (better 10...Bb4 11.0-0 Bd6=) 11.Be5+- Qe7 (11...Bd6 12.Bd4 Bh2 13.d3+-) 12.Bg3 (12.Bc3 Qe4 13.Qe2 Bd6+-) 12...0-0-0 (12...Qb4 13.Bb3 Bd6 14.Qf3+-) 13.c3 Ne4 14.Qf3 f5 15.Qf4 (better 15.h3+-) 15...Qd7 (15...Ng3 16.Qg3 Qf6+-) 16.a4 (better 16.Be6! Bd6 17.Bd7 Rd7+-) 16...Nd2?? (16...Bd6 17.Qf1 Bg3 18.hg3 Nd2 19.Rh8 Nf1 20.Rd8 Kd8 21.Bf1 Qe6+=) 17.Kf2 (better 17.Be6! Bd6 A) 18.Nd2 Qe6 19.Qf3 Bg3 20.Qg3 Rd3+-; B) 18.Kd2? Qe6 (18...Bf4?! 19.Bd7 Rd7 20.Kc2 Bg3 21.Nd2 Rh2 22.Rh2 Bh2 23.Rf1=+) 19.Qf3 Bg3 20.Kc2 Bh2-+; C) 18.Qd6 cd6 19.Bd7 Kd7 20.Nd2+-) 17...Nc4?? (better 17...Bd6 18.Qd4 Ne4 19.Kg1 Bg3 20.Qd7 Rd7=+) 18.Qc4+- Bd6 19.Bd6 Qd6 20.Qd4 Qf6 (better 20...Qe7 21.Qf4 Rd3+-) 21.Qf6 (21.Qa7?! Qh4 22.g3 Qe4 23.Qa8 Kd7=) 21...gf6 22.h3 g5 (22...Rh7 23.Ra2+-) 23.Ra2 f4 (23...a5 24.Rd2+-) 24.Rd2 (24.ef4 gf4 25.Kf3 Rh4+-) 24...Rde8 (24...fe3 25.Ke3 Rde8 26.Kf2+-) 25.ef4 gf4 26.Re1 (26.Rhd1 b6+-) 26...Reg8 (26...Re1 27.Ke1 f3 28.Kf2 fg2 29.Kg2+-) 27.Kf3 Rg3 (27...Re8 28.Ree2+-) 28.Kf4 Rhg8 29.Rde2 (better 29.Re7 Rg2 30.Rdd7 Rf2 31.Ke3 Rf1 32.Rc7 Kd8 33.Red7 Ke8+-) 29...Rg2 30.Rg2 Rg2 31.Rd1 b6 32.Kf5 Rf2 33.Ke6 Kb7 (33...f5 34.Nd2+-) 34.b5 (34.Rh1 f5 35.h4 f4+-) 34...Re2 (34...f5 35.Rd3+-) 35.Kf6 a6 36.Kg5 (36.h4 Rf2 37.Kg6 Rg2 38.Kh6 Ra2+-) 36...ab5 37.ab5 Rg2 38.Kh4 Rh2 39.Kg4 Rb2 40.h4 Rb5 41.h5 Rb4 (41...Rb4 42.cb4 Kc6 43.h6 Kb5 44.h7 Ka4 45.h8Q c5 46.Qb2 Kb5 47.Na3 Ka6 48.Rd7 cb4 49.Qe2 Ka5 50.Ra7). alessandrocarvalhaes (1875) – Renattat (1935), lichess.org, 2020.

5.e3 e6 6.a3 c6 7.Nf3 h6 8.Bd3 Bd3 9.cd3 Be7 10.Qc2 Nbd7 11.0-0 0-0 12.Ne5 Ne5 13.Be5 Bd6 14.Bd6 Qd6 15.d4 Ne4 (15...a5 16.ba5 Ra5 17.Ra2=+) 16.f3 Nf6 17.Nc3 Rfe8 18.Ne2 Rac8 19.Qc5 Qc5 20.bc5 Rb8 21.Nc3 b6 22.Na4 b5 23.Nc3 a5 Black plans b4 24.d3 b4 25.Na4 Nd7 26.ab4 ab4 27.Rfb1 e5 28.e4? (better 28.Rb3=) 28...de4-+ 29.fe4 ed4 30.Ra2 Rb5 31.Rab2 Nc5 (31...Reb8 32.Kf1 b3-+) 32.Nc5-/+ Rc5 33.Rb4 Rd8 34.Rc4 (better 34.Kf2!?-/+) 34...Rc4-+ 35.dc4 c5 36.Rd1 (36.Kf2 Re8 37.Kf3 f6-+) 36...Kf8 (36...Ra8 37.Rb1 Ra4 38.Rc1-+) 37.Kf2 Ke7 38.Kf3 (38.Ra1 Kd6-+) 38...Kf6 39.g3 Ke5 40.h4 (40.Rb1 d3 41.Ke3 d2-+) 40...h5 41.g4 (41.Ra1 d3 42.Ke3 d2-+) 41...Rh8 (better 41...hg4 42.Kg4 Ke4 43.Re1 Kd3 44.Re7-+) 42.g5 Rg8 43.Re1 f6 44.g6 Ra8 (44...Rd8 45.Ke2-+) 45.Kg2 (45.Rb1 Ra3 46.Kg2 Kf4-+) 45...Ra3 46.Rb1 Ke4 47.Rb7 d3 48.Rg7 d2 49.Rf7 (49.Rd7 Ke3 50.g7-+) 49...d1Q 50.Rf6 (50.Re7 Kf5 51.Re5 fe5 52.g7 Qe2 53.Kg1 Ra1) 50...Qg4 51.Kf2 (51.Kf1 Ra1 52.Kf2 Ra2 53.Ke1 Qe2) 51...Rf3 (51...Ra2 52.Ke1 Qe2) 52.Ke2 (52.Rf3 Qf3 53.Kg1 Qg3 54.Kf1 Ke3 55.g7 Qf2) 52…Rf6 (52...Rf6 53.Kd2 Rf2 54.Kc3 Qf3) 0–1. Atotheking (1685) – bluecjj (1725), lichess.org, 2020.

5.h4 Nbd7 6.a3 c6 7.d3 e5 8.Nf3 Bd6 9.Nbd2 Qe7 10.Rg1 Ng4 11.e4 d4 12.Rh1 h5 13.Nc4 Bc7 14.c3 b5 15.Na5 Ba5 16.ba5 c5 (16...dc3 17.Bc3 Nf2 18.Kf2 Qc5 19.Bd4 ed4 20.Qd2-/+) 17.cd4 ed4 18.Qb3 (18.Be2 0-0-/+) 18...a6 (18...f5 19.Qd5 Rc8 20.Ng5 fe4 21.de4-+) 19.Qd5 0-0 20.g3? (better 20.Be2!?-/+) 20...Rfd8 (better 20...Ndf6 21.Qg5 Be4 22.de4 Qe4 23.Be2 Rae8-+) 21.Qg5 Qg5 (better 21...Ndf6!? 22.Be2 c4-+) 22.hg5=+ Nde5 (better 22...Re8!?=+) 23.Ne5= Ne5 24.f4 Nc6 (24...Ng4!?=) 25.f5+= Bh7 26.Rh5 (better 26.Rc1!? c4 27.dc4+-) 26...Na5=+ 27.Rc1 g6 28.fg6 Bg6 29.Rh6 Rac8 30.Bh3 Rc7 31.Bf5 Kg7 (better 31...Bf5 32.ef5 c4-/+) 32.Bd4?? (better 32.Bg6 fg6 33.Ke2=) 32...Rd4-+ (32...cd4?? 33.Rc7 Rd6 34.Ra7+-) 33.Bg6 (33.Rc3 c4-+) 33...fg6 34.Ke2 Rcd7 35.Rc5 Rd3 36.g4 (36.Rc8 Rd8-+) 36...Rg3 (36...Ra3 37.Rd5 Rd5 38.ed5-+) 37.e5 (37.Rc8 Nc4 38.Rch8 Rd2 39.Kf1-+) 37...Rg4 38.e6 Re4 39.Kf3 Re6 40.Rc8 Re5 41.Kf4 (41.Rch8 Rf5 42.Kg4 Rd4 43.Kh3 Rg5 44.R6h7 Kf6 45.Rf8 Ke5 46.Re8 Kd6 47.Rd8 Kc5 48.Rd4 Kd4-+) 41...Rf5 42.Kg4 (42.Ke4 Rg5 43.Rch8 Re7 44.Kf3 Rf5 45.Kg2 Re2 46.Kg1 Nc4 47.R6h7 Kf6 48.Rf8 Kg5 49.Rf5 gf5-+) 42...Rd4 (better 42...Nc4 43.Rhh8 Ne5 44.Kg3 Rd3 45.Kg2 Rg5 46.Kh2 Ra3 47.Rhg8 Kf6 48.Rgf8 Ke6-+) 43.Kg3 (43.Kh3 Rg5 44.Rhh8-+) 43...Rg5 44.Kf3 0–1. beatmeeasy (1940) – grogrogo (1965), lichess.org, 2021.

5.h4 e5 6.Nb3 Nc6 (6...Nbd7 7.a3-/+) 7.b5 Nb4 8.d3 d4 9.e4 (9.c3 dc3 10.Nc3 Nbd5=+) 9...de3-/+ 10.fe3 Bd6 11.e4 Qd7 (better 11...Nh5!?=+) 12.a3+= Qb5 13.ab4 Bb4 14.c3 Bd6 15.d4 (better 15.Be2 h6 16.Na3+-) 15...Qb6= 16.d5?? (better 16.N1d2 ed4 17.Rh3=) 16...Ne4-+ (16...Be4?! 17.N1d2 Qe3 18.Qe2 Qg3 19.Kd1 Bd5 20.Rh3-/+) 17.Qe2 Ng3 (better 17...Qb3 18.Qb5 Qb5 19.Bb5 Ke7-+) 18.Qd1?? (better 18.Qb5 Ke7 19.Rh3 Nf1 20.Qb6 ab6 21.Na3-+) 18...Qe3 19.Be2 Bh5 (better 19...Nh1 20.Bc1 Qf2 21.Kd2 Qf4 22.Ke1 Qh4 23.Kd2 Qf4 24.Ke1 Qg3 25.Kd2 Qg2 26.Ke1 Qg3 27.Kd2-+) 20.Nc1 (20.Bc1 Qe4 (worse 20...Qe2 21.Qe2 Ne2 22.Be3-+) 21.N1d2 Qg2-+) 20...Nh1 21.c4 (21.Qa4 Ke7 22.g4-+) 21…Bb4 (21...Bb4 22.Nc3 Bc3 23.Bc3 Qc3 24.Qd2 Qa1 25.Bh5 0-0-+) 0–1. beatmeeasy (1890) – acohen (1880), lichess.org, 2020.

5.h4 e5 6.Nf3 e4 7.Ne5 Bd6 8.Ng6 hg6 9.c3? (9.a3!?-/+) 9...Nc6 10.Qb3 (10.e3 Ne5 11.c4 Nfg4 (worse 11...dc4 12.Be5 Be5 13.Nc3-/+; 11...Nc4?! 12.Bc4 dc4 13.Qc2-/+) 12.Be5 Be5 (12...Ne5?! 13.c5 Be7 14.Nc3-/+) 13.Qg4 Ba1-+) 10...Qd7 (10...Ng4 11.c4 (11.Qd5?? Nf2 12.Rh3 Rh4-+) 11...Rh4 12.Rh3-+) 11.e3 (11.Na3 Qf5 12.Nb5 0-0-0-+) 11...Ne5 (11...Qf5!? 12.Qc2-+) 12.Na3 c6 13.0-0-0? (13.c4 Qf5 14.cd5 Nfg4-+) 13...0-0-0 (13...Neg4 14.f4-+) 14.c4 (14.Be2 Kb8-/+) 14...dc4 (better 14...Neg4!? 15.f4 ef3 16.gf3 Nf2-+) 15.Bc4-/+ Neg4 (better 15...Nfg4!? 16.Rdf1 Qe7-/+) 16.Rhf1=+ Nh2 17.Rfe1 Nhg4 18.Re2 (18.Rf1 Rhf8-/+) 18...Rhf8 (18...Kb8 19.Bf7 Ne5 20.Be5 Be5 21.d3=+) 19.b5=+ cb5 (19...Kb8 20.Kb1=+) 20.Bb5 (20.Nb5 Kb8 21.Nd6 Qd6+-) 20...Qc7 (20...Qf5!? 21.Kb1 Kb8= (21...Nf2 22.Rc1 Kb8 23.Bc6+-)) 21.Kb1= Kb8 22.Rc1 Qb6?? (better 22...Qe7=) 23.Nc4+- Qc5 24.Bd4 (24.f3 Nh6 25.fe4 Ne4+-) 24...Qb4 25.Nd6 Qd6 (25...Qb3 26.ab3 Rd6 27.Bc5+-) 26.Bc5 Qh2?? (26...Qd5 27.Qd5 Nd5 28.Bf8 Rf8+-) 27.Bf8 Rf8 (27...Ka8 28.Qf7 a6+-) 28.Qc4 (better 28.Ba6! Qc7 29.Rc7 Kc7 30.Qb7 Kd6 31.Qb4 Ke6 32.Qf8+-) 28...a6 (28...Qd6 29.d4 a6 30.Ba4+-) 29.Ba6! ba6?? (29...Qd6 30.Bb5 Ne5+-) 30.Qb4 Ka7 31.Qf8 (better 31.Qc5 Kb7 32.Qe7 Ka8 33.Qf8 Qb8 34.Qb8 Kb8+-) 31...Qb8 (31...Nd7 32.Qc8 Qb8 33.Qb8 Kb8 34.d3+-) 32.Qb8 Kb8 33.Rc6 (better 33.d3 Ka7 34.Rb2 Ne5 35.Rc7 Ka8+-) 33...Kb7 34.Rc4 Ne5 35.Rb4 (35.Rc3 Ka7+-) 35...Ka7 (35...Kc7 36.Kc2+-) 36.a4 (36.d4 ed3 37.Reb2 a5+-) 36...Nd3 37.Rd4 Nc5 (37...Kb6 38.Kc2+-) 38.f3 Nb3 (38...Ne6 39.Rd6 Nc5+-) 39.Rd8 Nh5 40.Rd7 Kb6 41.Rf7 Ng3 (41...Nc5 42.Kc2 Ng3 43.Re1 ef3 44.gf3+-) 42.Re1 Nd2 (42...ef3 43.Kc2 f2 44.Rf2+-) 43.Kc2 Nc4 (43...ef3 44.Kd2 f2 45.Rb1 Kc5 46.Kd3 f1Q 47.Rbf1 Nf1 48.Rf1+-) 44.Rg7 Nf5 (44...Ne5 45.fe4 Kc6 46.Rd1+-) 45.Rg6 Ka5 46.fe4 (better 46.Rg5 ef3 47.Rf5 Kb6 48.gf3+-) 46...Nfe3 47.Re3! Ne3 48.Kd3 Nf1 49.h5 Ka4 (49...Nd2 50.Kd2 Ka4 51.Ra6 Kb5 52.Re6 Kc4 53.h6 Kb3 54.h7 Kb4 55.h8Q Kb5 56.Qd4 Ka5 57.Kc3 Kb5 58.Qb4) 50.Ra6 Kb4 (50...Kb5 51.Rg6 Kc5 52.h6 Kb4 53.h7 Ka4 54.h8Q Kb5 55.Qe5 Kb4 56.Rb6 Ka4 57.Qa1) 51.h6 Ng3 (51...Nd2 52.Kd2 Kb5 53.Ra1 Kc5 54.h7 Kd6 55.h8Q Kc6 56.Qc8 Kd6 57.Ra6 Ke5 58.Qf5 Kd4 59.Ra4) 52.h7 (52.h7 Nf5 53.h8Q Kb5 54.Qa1 Kb4 55.ef5 Kc5 56.Qa5) 1–0. beatmeeasy (1875) – zholden (1845), lichess.org, 2020.

5.h4 e6 6.a3 c5 7.bc5 Bc5 8.Nb3 Bb6 9.a4 (9.e3 Nbd7=) 9...Nbd7 10.a5 Bc7 11.e3 0-0 12.h5 Bf5 13.Be2 e5 14.g4 Be6 15.g5 White intends h6 15...Ne4 16.h6 (better 16.Ba3 Re8 17.g6-/+) 16...f6 (better 16...g6!?-/+) 17.hg7 Kg7 18.gf6 (18.Ba3 Rg8 19.a6 ba6 20.gf6 Qf6 21.Rh2-/+) 18...Qf6-/+ (18...Rf6?! 19.Bf3=; worse 18...Nef6 19.Nc3+=; worse 18...Ndf6 19.f3 Nf2 20.Kf2 Ne4 21.Kf1 Ng3 22.Kg2 Nh1 23.Qh1+- (23.Kh1 Qh4 24.Kg1 Kf7 25.Ra4 e4 26.Be5 Rg8 27.Bg7 Rg7 28.Kf1 Bh3)) 19.Rg1?? (19.f4 Qg6 20.Bf3 Rf4 21.Kf1 Rf3 22.Qf3-+) 19...Kh8-+ 20.Rf1 Bh3 21.d3 Bf1 22.de4 Qf2 23.Kd2 Be2 (23...Rf3! 24.Qf1 Qe3 25.Kd1 Rf1 26.Bf1-+) 24.Qe2 Qe2 (better 24...Qg3 25.Qd3 de4 26.Qe4-+) 25.Ke2 de4 26.Nc3 Nf6 27.Nb5 (27.Rf1 Kg7-+) 27...Bb8 28.Rf1 a6 (28...Rc8!? 29.Nc3 Kg7 30.Nd2-+) 29.Nc3 Bc7 (29...Kg8 30.Nc5 Bc7 31.Rg1 Kh8 32.N3e4 Ne4 33.Ne4-+) 30.Nc5? (30.Ba3 Rfc8 31.Rf6 Ba5 32.Ne4 Rc2 33.Kd1 Ra2-/+) 30...Rab8 (better 30...Ng4 31.Rf8 Rf8 32.N3e4 Ba5 33.Nb7 Bb4-+) 31.Ne6 Ba5 32.Nf8 Rf8?? (better 32...Bc3 33.Bc3 Rf8 34.Be5 Kg7-+) 33.Ne4= Nd7 (worse 33...Ne4 34.Rf8 Kg7 35.Rb8+-) 34.Rf8 Nf8 35.Be5 Kg8 36.Nd6? (better 36.Nc5!?=+) 36...b5 37.Kf3 (37.c4 Bc7-/+) 37...Ne6 38.Nf5 Bc7 39.Bb2 Kf7 40.Nh6 Kg6 41.Ng4 h5 42.Nf2 Ng5 43.Ke2 Kf5 44.c3? (44.Kd3 a5-+) 44...a5 (44...Ne4 45.Ba3-+) 45.Nh1 (45.Kd3 Ne6-+) 45...Kg4 (45...Ne4 46.Kd3-+) 46.Kf2? (46.Nf2 Kg3 47.Ba3-+) 46...Ne4 47.Kg2 h4 48.Nf2 Nf2 49.Kf2 h3 50.Kg1 h2 51.Kh1 (51.Kg2 Kf5 52.Ba3 Ke4-+) 51...Kf3 52.Bc1 Be5 53.Bd2 a4 54.Bc1 Ke2 (better 54...Bc3 55.Kh2 b4 56.Kh3-+) 55.Ba3 Kd3 56.Bb4 (56.Bc5 Kc3 57.Ba7 a3 58.Bd4 Bd4 59.Kh2 a2-+) 56...Ke3 (56...Bc3 57.Bc3 Kc3 58.e4-+) 57.Kg2 (57.c4 bc4 58.Kg2-+) 57...Kd3 58.Kh1 Bc3 59.Bc3 Kc3 60.Kh2 a3 61.Kg2 a2 (61...a2 62.Kg3 b4 63.Kf4 b3 64.Kg4 b2 65.Kh5 a1Q 66.Kg4 Qa4 67.Kg3 b1Q 68.Kf2 Qf4 69.Ke2 Qbf1) 0–1. beatmeeasy (1915) – sefko (1980), lichess.org, 2020.

5.h4 h5 (5...e5!? 6.Nb3 Nbd7-/+) 6.a3=+ e6 7.Nf3 Bd6 8.Be5 Be7 9.Bg3 Nbd7 10.Nc3 c5 11.Rb1 cb4 12.ab4 a6 13.b5 Ne4 14.Ne4 Be4 15.b6 (15.ba6 ba6 16.e3 Bf6=+) 15...Rc8 (better 15...Nb6!? 16.e3 Rc8-/+) 16.Bc7= Rc7 17.bc7 Qc7 18.d3 (18.Ng5 A) worse 18...Qc2 A1) worse 19.Rb7 Qc6 20.Rb2 0-0=; A2) worse 19.Ne4 Qe4 20.Rc1 b5=+ (worse 20...Bh4 21.Rh4 Qh4 22.Rc8 Qd8 23.Qc1+-); A3) 19.Qc2 Bc2 20.Rb7+=; B) 18...Bg6=) 18...Bf3=+ 19.ef3 Qa5 (19...Bf6!? 20.Be2 Bc3 21.Kf1 b5-/+) 20.Qd2= Qc7 21.d4 a5 22.c3 0-0 23.Be2 Ra8 24.f4 g6 25.g4 hg4 26.Bg4 (26.h5 gh5 27.f5 Rc8 28.Rh5 ef5=) 26...a4 (26...Nf6 27.Bf3=+) 27.h5= a3 (better 27...Nf6 28.Bf3 gh5=) 28.hg6+- fg6? (better 28...Nf6 29.f3 Bd6+-) 29.Be6+- Kg7 30.Bd5 Nf6 (30...Nb6 31.Be4 a2+-) 31.Ba2 (better 31.f5 Ng8 32.fg6+-) 31...Ne4 32.Qe3 Qc3 33.Qc3 Nc3 34.Rb7 Kf6 35.Rb6 (better 35.Rh7!? Na2 36.Rbe7+- (36.Rhe7?! Nb4 37.Ra7 Rd8+-)) 35...Kf5+- 36.Be6 Kf4 (36...Ke4 37.Kd2 Kd4 38.Rc6+-) 37.Rh3 (37.Rb7!? Bd6 38.Kd2 Ne4 39.Kc2+-) 37...a2+= 38.Ba2 Na2 39.Rg6 Bb4 40.Ke2 Nc3 41.Kd3 Ra3? (better 41...Ne4 42.Rh4 Kf5 43.Re4 Kg6+=) 42.Kc4+- Na2? (42...Ba5 43.Rf6 Kg5+-) 43.Ra3 Ba3 44.Kb3 (44.Ra6 Be7 45.Ra2 Kf5+-) 44...Nc1 (44...Nb4+-) 45.Ka3 Nd3 46.Rd6 (46.d5 Kf5 47.d6 Nc5+-) 46...Nf2 (46...Ke4+-) 47.Rf6 Ke4 48.Rf2 (48.Rf2 Kd4 49.Kb4 Ke3 50.Rf8 Kd3 51.Kc5 Ke4 52.Re8 Kf4 53.Kd5 Kf3 54.Re4 Kg3 55.Ke5 Kf3 56.Kf5 Kg3 57.Rf4 Kh3 58.Rg4 Kh2 59.Ke4 Kh3 60.Kf3 Kh2 61.Rh4 Kg1 62.Rh3 Kf1 63.Rh1) 1–0. beatmeeasy (1955) – hadi4161 (1970), lichess.org, 2021.

4.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3).

4.e3 Nbd7 5.a3 e6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

4.e3 Nbd7 5.c4 c6 6.d4 e6 7.a3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.d4).

4.e3 Nbd7 5.Be2 e6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

4.e3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6).

4.e3 e6 5.a3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

4.e3 e6 5.a3 Be7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Be7).

4.e3 e6 5.b5 c6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5).

4.e3 e6 5.b5 Bd6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Bd6).

4.e3 e6 5.c4 dc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4).

4.e3 g6 5.Be2 Bg7 6.0-0 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0-0 6.0-0 Bf5).

5.a3 Nd7 6.Nc3 c6 7.Nd4 Bd6 8.Nf5 1–0. mtre – Zugzwang, internet, 2002.

5.b5 c6 6.a4 Bd6 7.g3 0-0 8.Bg2 Be5 9.d4 Bd6 10.0-0 c5 (better is 10...Qa5!?+=) 11.Nc3 Be6 12.e3 (12.dc5 Bc5 13.Nd4 Bb4 14.Ne6 fe6 15.Nd5 a5 16.Nb4 ab4 17.Qd8 Rd8 18.Bb7 Ra7+-) 12...Qa5 (12...c4 13.e4 de4 14.Ne4+=) 13.Ne2 (13.dc5!? Qc3 14.cd6+/–) 13...Nd7 14.c3 (14.dc5 Nc5 15.c4 Rad8 16.cd5 Bc7+=) 14...a6 15.Qb1 ab5 16.ab5 Qa1 (16...Qc7!?=) 17.Qa1+= Ra1 18.Ra1 f5 19.Ra7 b6 20.Ng5 Rd8 21.f4 (better is 21.c4 Nf6 22.cd5 Nd5 23.Ra6+/–) 21...f6?? (better is 21...h6 22.Ne6 fe6+=) 22.Ne6+- Re8 (22...Bb8 23.Rb7 Re8 24.Rd7+-) 23.Ng7 (better is 23.Rd7 Bf8+-) 23...Kg7 24.Rd7 (24.Rd7 Be7 25.Bd5+-) 1–0. Baer,Cy (1895) – Fiesel,Hans juergen (1635), RSS5E–30 remoteschach.de, 2008.

5.Bg2 e6 6.a3 Bd6 (6...c5!?) 7.d3 Qe7 8.Nbd2 e5 9.0-0 0-0 10.c4 c6 11.cd5 cd5 12.e4! Bg4 13.h3 Bf3 14.Qf3 d4 15.Nc4+=. Kulichenko – Makeyev, corr, 1951.

5.Bg2 h6 6.0-0 e6 7.d3 Bb4 8.Nbd2 0-0 9.Rb1 Bd6 10.c4 c6 11.Nd4 Bh7 12.e4 Ne5 13.Qe2 dc4 14.Nc4 Nc4 15.dc4 Bc5 16.e5 Bb1 17.Rb1 Bd4 18.Rd1 c5 19.ef6 Qf6 20.Bd4 cd4 21.Bb7 Rab8 22.Be4 Rfc8 23.Rc1 Rc5 24.Bd3 a5 25.h4 a4 26.Qe4 g6 27.Kg2 Rb2 28.Rf1 h5 29.Qa8 Kg7 30.Qa4 Qe5 31.Qa8 Ra5 32.Qf3 Raa2 33.g4 hg4 34.Qg4 Qe3 35.Qf3 Rb3 36.Be4 Qf3 37.Bf3 Rc3 38.Rd1 Rcc2 39.Rd4 Rf2 40.Kg3 Rfc2 41.Kf4 Ra3 42.Be4 Rcc3 43.Ke5 Ra5 44.Kd6 Kf6 45.Bc6 e5 46.Re4 Kf5 47.h5 gh5 48.Rh4 Kg5 49.Re4 f6 50.Bd5 h4 51.Re1 h3 52.Rh1 Kh4 53.Ke6 Ra6 54.Kf5 Kg3 55.Ke4 Rd6 56.Rd1 h2 57.Kf5 Rd5 58.cd5 Kg2 59.Kf6 e4 60.d6 Rc8 61.Ke7 h1Q 62.Rh1 Kh1 63.Kd7 Ra8 64.Kc7 e3 65.Kb7 Rh8 66.d7 e2 67.Ka7 e1Q 68.Kb7 Qb4 69.Ka7 Qc5 0-1. watusi (2255) - _Heisenberg (2270), Rated Blitz game, lichess.org. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Bf5)

5.a3+= a5 6.ba5 Ra5 7.e3 Bd6 8.Nh4 Be4 9.d3 Bg6 10.Ng6 fg6 11.Qd2 +=.

5.a3 a5 6.b5 Be4 7.e3 Bd6 8.Be2 0-0 9.0-0 c6 10.a4 Bc7 11.d4 Bf3 12.Bf3 Qd6 13.g3 Nh5?? (better is 13...Rc8 14.c4 dc4 15.bc6 Nc6=) 14.Bh5 (better is 14.Ba3 Qd8 15.Bf8 Ng3 16.fg3 Qf8+-) 14...g6 (14...Rc8 15.Nc3 cb5 16.Nb5 Qd7+-) 15.Ba3 c5 (15...Qd8 16.Bf8 Qf8 17.Be2+-) 16.Bc5 Qd8 17.Bf8 Kf8 18.Bf3 Nd7 19.Nd2 Nf6 20.c4 h5 21.e4 h4 (21...dc4 22.Nc4 Rc8 23.Rc1+-) 22.e5 Nd7 23.cd5 hg3 (23...ed5 24.Bd5 Ne5 25.Bb7+-) 24.de6 gf2 25.Rf2 Ne5 26.de5 Be5 (26...Bb6 27.Ne4 Bf2 28.Kf2 Qb6 29.Ke2 Qe6 30.Qd6 Qe7 31.Qf6 Qf6 32.Nf6+-) 27.Bb7 Qg5 (27...Rb8 28.Rf7 Kg8 29.Nf3+-) 28.Kf1 Rd8 29.Rf7 (29.Rf7 Kg8 30.Qb3+-) 1–0. Carloschess – Leamsi, playchess.de, 2003. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 Bf5)

5.b5 a6 6.e3 (6.ba6 Na6 7.Nh4 Be4 8.d3 Bg6 9.Ng6 fg6 10.Nd2 Bb4 11.e4=) 6...ab5 7.Bb5 c6 8.Be2 Bb4 9.0-0 0-0 10.Nh4 Be4 11.d3 =.

5.g4 Be4 6.a3 Bf3 7.ef3 Bd6 8.d4 (8.g5!? Nfd7 9.Bg7+=) 8...0-0 9.Bd3 a5 10.c3 Re8 11.Qc2 Nbd7 (11...e5 12.de5 Be5 13.0-0-/+) 12.Nd2 (12.g5!?=) 12...e5 13.0-0 ed4 14.Rfe1 dc3 15.Bc3 ab4 16.ab4 Ra1 17.Ra1 g6 18.Qa4 Qe7 19.Nf1 d4! 20.Bd4 Be5 21.Be5 Ne5 22.Be2 Nd5 23.Nh2 Nf4 24.Bf1 Ned3 25.Bd3 Nd3 26.Rf1 c6 27.b5 c5 0–1. capablancaven (2220) – nopersona (2310), gameknot.com, 2013.

5.a3 =+.

5.f4 Nc6 6.b5 Na5 7.e3 e6 (7...Nc4 8.Bf6 ef6 9.Nc3=+) 8.Nc3 Ne4 (8...c6 9.Nf3=) 9.Ne4 (9.Nf3 Nd6=) 9...de4 10.g3 Be7 (better is 10...c6!?=+) 11.Bg7+/– Rg8 12.Bc3 b6? (better is 12...Bh4!? 13.Ba5 Bf6+=) 13.Qh5+- Bh4 (better is 13...h6+-) 14.Qh7 (14.Qh4?! Qh4 15.gh4 c6+=) 14...Rf8 15.gh4 Ke7 (15...Qe7+-) 16.Bb4 c5 (16...Ke8 17.Qh6 Qe7 18.Be7 Ke7 19.Qg5 f6 20.Qg6+-) 17.bc6 (17...Ke8 18.Qh6 Bc6 19.Qf8 Kd7 20.Qf7 Kc8 21.Ba5 Qh4 22.Kd1 Qg4 23.Be2+-) 1–0. Wall,Bill – Krusher, internet, 2005.

5.f4 e6!? -/+.

5.Ng6= hg6 6.e3 Qd6 7.Bd4 =.

5.Ng6= hg6 6.e3 e6 7.a3 c5 8.Bb5 Nc6 9.bc5 Bc5 10.0-0 (10.Nc3 a6 11.Be2 b5=+) 10...Qb6=+ 11.Bf6 gf6 (< 11...Qb5 12.Bg7 Rh7 13.Bf6+=) 12.Nc3 a6 13.Be2 Qc7 14.h3 Bd6 15.Qb1 (15.f4 Rd8=+) 15...Kf8 (15...Bh2 16.Kh1=+) 16.Qb2 Kg7 (16...b5 17.f4=+) 17.Bf3 (17.a4 Rh4=) 17...Ne5 18.Be2 Rh7 (18...b5 19.Rfb1=+) 19.Rfb1 (19.a4 b6=) 19...b5=+ 20.a4 b4 21.Na2 a5 22.c3 Nc4 23.Bc4 Qc4 24.cb4 ab4=+ 25.Rc1 Qe2 26.Re1 Qh5 27.Qc2=+ Qe5 28.f4+= Qf5 29.Qc6+/– Rd8 30.a5 g5 31.Qb6+= Rhh8 32.Nb4 gf4 33.Nc6 Rdg8? 34.Nd4+- Qe5 35.Nf3 Bc7 36.Ne5 Bb6 37.ab6 fe5+/– 38.b7 fe3 39.Re3 Kf6 40.Rf1+- Ke7 41.Re5 Rb8 42.Rb1 Kd6 43.Re3 d4 44.Rf3 f5 45.Rb6 Kd5 46.Rfb3 e5?? 47.d3 (47…Rhc8 48.bc8R Rc8 49.R3b5 Rc5 50.Rc5 Kc5 51.Rf6+-) 1–0. Wall,Bill – Chatrang, internet, 2004.

5.Ng6= hg6 6.e3 e6 7.a3 Bd6 8.h3 =.

5.Ng6= hg6 6.e3 e6 7.a3 Nbd7 8.c4 dc4 9.Bc4 Nb6 10.Bb5 c6 11.Be2 Bd6 12.f4 Ne4 13.0-0 Rh7 (13...Qh4 14.h3=) 14.d3 Nf6 15.e4 Bc7 16.e5 (16.Qc2 g5 17.d4 Bf4=) 16...Nfd5 17.Qc1 (17.Rf3 Rh4 18.Qd2 f6=) 17...Qh4 (17...Na4 18.Bd4 Ndc3 19.Bc3 Bb6 20.d4 Nc3 21.Qc3 Bd4 22.Kh1 Bc3 23.Nc3 Qd2-+) 18.h3= Na4 19.Bd4 Kd7 (better is 19...Bb6 20.Bb6 Nab6= (< 20...Ndb6 21.Nd2+=)) 20.Bf2?? (better is 20.Qd2!?=) 20...Qf4 21.d4-/+ Rf8 22.Ra2 f6 23.Qf4 Nf4-/+ 24.Bd1 Nb6 25.ef6 gf6 26.Bc2 f5 27.Re1 Nbd5 28.Nd2 Nc3 29.Bd1?? Na2-+ (30.Nb3 b6-+) 0–1. Seack,Ingo – Katzensteiner, corr SOK–88–20, 1989.

4.Nd4 Bg6 5.e3 (5.a3 Nf6=) 5...e6 (5...e5 6.Nf3 f6 7.a3=) 6.Nf3 (6.a3 Nd7=) 6...Nf6 Black gets the initiative 7.a3 a5 8.c4 (8.b5 Bd6=) 8...ab4=+ 9.ab4 Ra1 10.Ba1 Bb4 (10...Nc6 11.Ne5 Ne5 12.Be5 dc4 13.Bc4=+) 11.cd5= ed5 12.Bb5 (better is 12.Qa4!? Nc6 13.Bb5=) 12...c6-/+ 13.Ba4 (13.Qb3 Qe7 (13...cb5?! 14.Qb4 Bd3 15.Qb3=) 14.Bf6 gf6=+ (< 14...Qf6 15.Qb4 cb5 16.Nc3=)) 13...Bh5 14.Bc3 (14.Qb3 Na6 15.Ne5 Qd6-/+) 14...Bc3-+ 15.Nc3 Nbd7 16.0-0 (16.Qc2 Bf3 17.gf3 d4-+) 16…Ne5!? (17.Bc2 Qc8-+) 0–1. wlittle (2235) – redrook (2430), net–chess.com, 2004.

4.e3 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.Nf3 h6).

4.e3 Nf6 5.c4 Nc6 6.cd5 Nd5 7.a3 e6 8.Bb5 a6 9.Bc6 bc6 10.Nd4 Bd3 11.Nc6 Qg5 12.Qf3 Bd6 13.Nc3 0-0 14.Ne4 Be4 15.Qe4 Rfe8 16.0-0 Qh5 17.g3 Qh3 18.Rac1 Nf6 19.Bf6 gf6 20.d4 f5 21.Qf3 Kh7 22.a4 Rg8 23.Rfe1 h5 24.a5 Rg7 25.Qe2 Rag8 26.Rc2 h4 27.Qh5# 1–0. Machete99 – Jamonitjo, ICC, 2002.

4.g3 a6 5.Bg2 e6 6.0-0 Nf6 7.a3 Be7 8.d3 0-0 9.c4 c6 10.Nbd2 Nbd7 11.c5 Re8 12.Ne5 Qc7 13.Ndf3 Ng4 14.Nd7 Qd7 15.Nd2 (15.h3 Nf6+=) 15...Rab8 (better is 15...Bf6!? 16.d4 Be7=) 16.e4+/– de4 17.de4 Bg6 18.Qg4 Qd2 19.Be5 Rbd8 20.Bc7 Rc8 21.Rfd1 Qg5 (21...Qb2 22.Bd6+=) 22.Qg5+= Bg5 23.Bb6 Bf6 24.Ra2 Bh5 25.Rd7 Re7 26.Rad2 Kf8 27.Rd8 Re8 28.Rc8 Rc8 29.Rd7 Be2 (29...Rb8 30.f4+=) 30.Bf1 (30.Rb7 Bb5+/–) 30...Bf3 (30...Bf1!? 31.Kf1 Rb8+=) 31.Rb7+/– Be4 32.Ba6 Ra8 33.Ra7 Re8? (better is 33...Ra7 34.Ba7 Ke7+/–) 34.Bc7 Bb2 (34...Kg8 35.Bb7 Re7 36.Bd6+-) 35.Bb7 Kg8 (35...Ke7 36.Bd6 Kf6 37.b5+-) 36.b5! Re7 (36...cb5 37.Be4 Pinning (37.Be4 Deflection)) 37.Bc6 Bc6 38.bc6 Bd4 (38...Re8 39.Rb7 Bc3 40.Rb8 Rb8 41.Bb8+-) 39.Bb6 (better is 39.Ra8 Kh7 40.Bd6 Bc5 41.Be7 Be7 42.c7+-) 39...Re8 40.Rd7 Be5 41.Rd8 (41.c7 Bc7 42.Bc7 Kh7+-) 41...Rd8 (41...Kf8 42.c7 Bc7 43.Re8 Ke8 44.Bc7 Kd7+-) 42.Bd8 Kf8 (42...f5+-) 43.c7 Bc7 44.Bc7 Ke7 (44...Ke8 45.c6 Ke7 46.a4+-) 45.c6 f6 46.Bb6 Kd6 47.c7 Kd7 48.a4 Kc8 49.a5 Kb7 50.a6! (50.a6 Ka6 51.c8Q Kb6 52.Qe6 Ka5 53.Qd5 Kb6 54.Qd6 Ka5 55.Qc7 Kb4 56.Qg7+-) 1–0. algernon (2510) – grahamtrue (2225), net–chess.com, 2015.

5.a4 Nc6 6.b5 ab5 (6...Nb4 7.d3 ab5 8.c3=) 7.Bb5+= e6 8.Nd4 Bc5?? (better 8...Nge7+=) 9.Nc6+- bc6 10.Bc6 Ke7 (10...Kf8 11.Ba8 Qa8 12.Ba3 Ba3 13.Ra3+-) 11.Ba8 Qa8 12.Bg7 Rh7 13.Be5 f6 14.Bc7 d4 15.0-0 Rg7 (15...e5 16.c3 Rg7 17.f3+-) 16.Bg3 Bg4 (16...Be4 17.f3 de3 18.de3 Be3 19.Kh1+-) 17.f3 (17.Qe1 Bf5 18.d3 de3 19.fe3 Kd8+-) 17...Bh5 (17...de3 18.de3 Be3 19.Kh1+-) 18.c3 de3 19.d4 Bd6 20.Bd6 Kd6 21.Qe2 f5 (21...Ra7 22.Na3 Ke7 23.Nc4+-) 22.Qe3 Nf6 (22...Ra7 23.Qe5 Kd7 24.Re1+-) 23.Qh6 Qf8 (23...Rg6 24.Qe3+-) 24.Qf4 Ke7 25.Qc7 (25.a5 Qg8 26.Ra2 Nd7+-) 25...Nd7 26.a5 Qg8 The mate threat is Rxg2 27.Ra2 e5 28.Re2 (28.c4 Qa8 29.de5 Bf3+-) 28...e4 29.a6 (better 29.c4 Qa8+-) 29...Kf6 (29...Rg6 30.Qa5 Qc4+-) 30.a7 ef3 31.Qc6 Kg5 32.Rb2 fg2 33.Rg2 Kh4 34.a8Q Rg2 35.Qg2 (35.Qg2 Qg6 36.Qd8 Nf6 37.Qf6 Qf6 38.Qg3) 1–0. DEFFM – GuestMTRF, freechess.org, 2020.

5.d4 Nf6 6.c4 e6 7.a3 c6 8.cd5 ed5 9.Nc3 Bd6 10.Bd3 Ne4 11.Qc2 b5 (better is 11...Qe7=) 12.Ne4+- (12.Be4?! de4 13.Nd2 0-0=) 12...de4 13.Be4 Be4 14.Qe4 Qe7 15.Qe7 Be7 16.Rc1 0-0 17.Ne5 Rc8 18.Ke2 a5 19.ba5 Ra5 20.Ra1 c5 21.dc5 Rc5 22.Rhc1 Na6? (better is 22...f6 23.Ng6 Bd6 24.Rc5 Bc5+/–) 23.Nc6+- Ra4 (23...Rc6 24.Rc6 f6+-) 24.Ne7 (24.Ne7 Kh7 25.Rc5 Nc5 26.Nf5+-) 1–0. Fournier,Frederic (1980) – NN, jeu.europe–echecs.com, 2013. (=1.Nf3 h6 2.b4 d5 3.Bb2 Bf5)

5.c4 dc4 6.Bc4 Ngf6 7.0-0 e6 8.a3 Bd6 9.Nc3 c6 10.Re1 Qc7 11.d4 Bg4 12.h3 Bh5 13.g4 Ng4 (better is 13...Bg6!?=) 14.hg4+/– Bg4 15.Be2 g5 16.e4 f6 17.Nd2 Be2 18.Qe2 0-0-0 19.Rac1 Kb8 20.Qg4 Bh2 21.Kg2 Bf4 22.Rc2 Qd6 23.Na4 h5 24.Qe2 h4 25.Nc5 h3 26.Kh1 Rh4 (26...Nc5 27.bc5 Qd7 28.d5=) 27.Nd7 Rd7 28.Rg1 f5 29.Nf3 Rg4 30.Rg4 fg4 31.Ng5 (better is 31.Nd2!? Bd2 32.Qd2+/–) 31...Bg5= 32.Qg4 Qf4 33.Qf4 (33.Qe6?? Qf3 34.Kh2 Qg2) 33...Bf4 34.Re2 (better is 34.Rc5!?=+) 34...e5!-+ 35.Re1 (35.de5 Rd1) 35...ed4 36.Bc1 Be5 (better is 36...Rf7!?-+) 37.f4=+ Bg7 38.e5 d3 39.Bd2 Bh6 40.Kh2 Rh7 41.e6 Bf8 42.Re3 Re7 43.Kh3 Bh6 44.Re4 (44.Kg4!? Re8+-) 44...Kc7+/– 45.Kg4 Kd6 46.Kh5 (better is 46.Re3!? Re6 47.Re6 Ke6 48.f5 Kd5 49.Bh6+-) 46...Re6 47.Re6 Ke6 48.Kh6 Kf5 49.Kg7 b6 50.Kf7 c5 51.b5 (51.bc5!? bc5 52.Ke7+/–) 51...c4+= 52.Ke7 Ke4 53.Ke6 Kd4 54.f5 c3 55.Bc3 Kc3 56.f6 d2 57.f7 d1Q 58.f8Q Qb3 59.Kd7?? (better is 59.Kf6 Qb5 60.Kg6-+) 59...Qb5-+ 60.Kd8 Qd5 61.Ke8 (61.Kc7 Qc5 62.Qc5 bc5 63.Kc6-+) 61…Qa8 (62.Ke7 Qf8 63.Kf8 Kb3-+) 0–1. Larsen,Andreas – Pedersen,Johnny K, NNM Tromsoe, 1999.

5.c4 e6 6.cd5 ed5 7.a3 (7.Nc3 Ngf6=) 7...Ngf6= 8.Nc3 Be7 9.Qb3 c6 10.Be2 a6 (10...0-0 11.0-0=) 11.0-0 0-0 12.h3 (12.Nd4 Bh7=) 12...Ne4 (12...Bg6 13.Na4=) 13.d3 (13.Nd4 Bg6 14.Ne4 de4=) 13...Nc3= 14.Bc3 Bf6 15.Bf6 Qf6 16.Nd4 Bg6 17.Rac1 Rfe8 18.a4 (18.Rfd1 Nf8=) 18...Ne5 (18...Nf8 19.b5 ab5 20.ab5=) 19.Rc2+= Qe7 20.Qc3 f6 (20...Rac8 21.a5+=) 21.Re1 Nd7 22.Qd2 Nb6 23.Ra2 Red8 (23...Nd7 24.a5+=) 24.h4 (24.Bg4 Nd7+=) 24...h5 25.Bd1 Re8 26.Ne2 Nd7 27.Nf4 Bf7 (27...Qf7 28.Be2+=) 28.Bh5+- Bh5 29.Nh5 f5 30.g3 Ne5 (30...d4 31.Nf4+-) 31.Kg2 g5 (31...Rad8 32.Nf4+-) 32.hg5+- Qg5 33.Rh1 Ng4 34.Nf4 Kg7?? (better 34...Ne5+-) 35.Qc3 Ne5 36.Nh5 Kg6 (36...Kf7 37.f4 Qe7 38.Rf2+-) 37.f4 Qg4 (37...Qe7 38.fe5 Qe5 39.Nf4 Kg7+-) 38.fe5 Rh8 (38...Qh5 39.Rh5 Kh5+-) 39.Nf4 Kg5 40.e6 (40.e6 Rhg8 41.Rh7 Rg6 42.Nh3 Qh3 43.Kh3 Rd8 44.e7 Re8 45.Qd4 Rh6 46.Rh6 Kh6 47.Qf6 Kh7 48.Rh2 Ra8 49.Kg2 Kg8 50.Qg6) 1–0. Pierre – Brasca, internet, 2020.

5.d4 Ngf6 6.c4 dc4 7.Bc4 Nb6 8.Bb3 e6 9.b5 (9.a3 Bd6=) 9...Be7 10.0-0 0-0 11.Nc3 Ne4 12.Rc1 (12.Ne4 Be4 13.Ne5 a6=) 12...Nc3+= 13.Rc3 Be4 14.a4 Nd5 15.Rc1 Bd6 16.Ne5 Qh4 17.Qg4 Qg4 18.Ng4 h5 (18...Bd3 19.Rfe1 Bb4 20.Bd5 ed5 21.Bc3+=) 19.Ne5= Nb4 20.Rfd1 (20.Ba3 Nd3 21.Nd3 Ba3+=) 20...Be5 21.de5 Nd3 22.Rc2 Nb2 23.Rb2 c5 (23...Rfd8 24.Rd4 Rd4 25.ed4=) 24.f3+/– Bg6 25.e4 b6 26.Rbd2 a6 27.Bc4 ab5 28.Bb5 f5 (28...Kh7 29.Rd6 Rab8 30.Ba6+/–) 29.Rd6 fe4 30.Re6 (30.Rb6?! ef3 31.gf3 Bc2+=) 30...Bf7 (30...Be8!?+/–) 31.Rb6+- ef3 32.Rc6 (better is 32.Rc1!?+-) 32...Bb3 33.Rd7?? (better is 33.Ra1 f2 34.Kf1+/–) 33...Rfb8?? (better is 33...f2 34.Kf1 Ra4-+) 34.Rg6 Bf7+/– 35.Rgd6 Be8+= 36.Rc7 Bb5= 37.ab5 Rb5 38.Rdd7 Ra2 39.Rg7 Kf8 40.Rb7?? Rb7-+ 41.Rb7 Re2?? 42.e6?? Re6 43.Rc7 c4 ½–½. Diaz Lombardo (2045) – Villanueva Garciacano (2000), Fide Mercenarios, 1999.

5.Be2 Ngf6 6.0-0 e6 7.b5 Bd6 8.d3 0-0 9.Nbd2 Bh7 10.c4 a6 11.a4 Re8 12.d4 ab5 (12...c5 13.bc6 bc6 14.c5+=) 13.c5= Be7 14.ab5 b6 (14...Ra1 15.Qa1 Qb8 16.Bc3+=) 15.c6 Nf8 (15...Ra1 16.Qa1 Nf8 17.Qa4+=) 16.Qb3 Rc8 17.Ba3 Bd6 18.Bd6 Qd6 19.Ra7 Red8 (19...Bf5 20.Rfa1+/–) 20.Rfa1 Qe7 21.R1a6 Qd6 22.Ne5 Ne8 23.Bh5 Ng6 24.Bg6 Bg6 25.Ng6 fg6 26.Nf3 Qf8 27.Ne5 Kh7 28.h3 Nd6 29.f3 Qf6+/– 30.Ra1 h5 31.Rf1 Qf5 32.g4 Qg5 33.Kg2 Rf8 34.Qd3 Nc4 35.f4 Ne5 36.de5 Qe7 37.gh5 Rf5 38.hg6 Kg6 39.Kh2 Kh6 40.Rg1 g5 41.Ra2+- gf4 42.Rag2 Qh4?? 43.Rg6 Kh7 44.Re6 Rcf8 45.e4 de4 46.Qe4 Kh8 47.Qf3 Rd8?? 48.Rg2 Rg5 49.Rf6?? Rg3= Attacks the isolani on h3 50.Rg3 fg3 51.Kg2?? Rd2 (51...Rd2 52.Qf2 gf2 53.Rf8 Kg7 54.Rf5 Qe4 55.Rf3 f1Q 56.Kf1 Qb1#) 0–1. Melderis,Uldis (2000) – Galuscak,Viktoras (1825), Palanga LTU, Baltija Cup, 2012.

5.Be2 Ngf6 6.b5 e6 7.0-0 Bd6 8.c4 0-0 9.cd5 ed5 10.Nd4 Bh7 11.Ba3 Nc5 12.Nc3 Re8 13.d3 Nfd7 (13...a6!?=) 14.Nd5+= Ne5 The pressure on d3 grows 15.Nf4 g5 16.Bc5 Bc5 17.Nh5 Bd4 18.ed4 Nd7 19.Bf3 Rb8 20.Qc2 Nb6 21.Bb7! Bg6 (21...Rb7 22.Qc6 Double attack (22.Qc6 Decoy)) 22.Bf3 Qd4 23.Qc7 Kh8 24.a4 g4 (24...Nd7 25.Bc6 Rbd8 26.Ng3+-) 25.Bg4 Nd5 (25...Qg4?? 26.Qc3 Qd4 27.Qd4 Re5 28.Qe5 f6 29.Qf6 Kg8 30.Qg7) 26.Qc4 Qe5 27.Bf3 Nb6 (27...Bh5 28.Bd5 Rbc8 29.Bc6+-) 28.Qf4 Qf4 29.Nf4 Bf5 (29...Kg7 30.Rfc1 Rbd8 31.a5+-) 30.Rfc1 Re7 31.Rc6 Rbe8 (31...Kg7 32.d4+-) 32.g4 (32.Rh6?! Kg7 33.g4 Bg4 34.Bg4 Kh6+-) 32...Bc8 (32...Be6 33.a5 Nd7 34.d4+-) 33.a5 Bb7 34.ab6 (34.ab6 Bc6 35.bc6 ab6 36.d4+-) 1–0. Pcmvr – Rustaveli, playchess.de, 2005.

(--> 3.e3 e6 4.Nf3 h6).

5.b5 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 h6).

4.e3 Bb4?? 5.Bg7 e5 6.c3 +-.

4.e3 Nf6 5.a3 c5 =+.

4.Nf3 Qd6 5.e3=+ (5.Be5 Qb4 6.Nc3+=).

4.Nf3 Nd7 5.e3 (5.a3 Ngf6=+) 5...Ngf6 (5...Bb4?? 6.Bg7 Ngf6 7.Bh8+-) 6.b5 h6 (6...Be7 7.Be2=) 7.a4 (7.Be2 Bc5=) 7...c5 (7...Bd6 8.Be2=) 8.bc6 (8.Be2 Be7=) 8...bc6 9.Nd4 (9.Nc3 Rb8 10.Rb1 Ne4=+) 9...Qb6 (9...Bg4 A) 10.Nc6? Qb6 (10...Bd1?! 11.Nd8 Bc2 12.Nc6=+) 11.Qc1 Qc6-+; B) 10.Be2 Be2 11.Qe2=+) 10.Ba3 (10.Ra2 Bg4 11.Be2 Be2 12.Qe2 Bb4=) 10...Bg4=+ 11.Qc1 c5 12.Ne2 Bd6 13.Nbc3 a6 14.Ng3 0-0 15.h3=+ Bh5 16.Nh5 Nh5 17.Ne2 e5 18.g4 Nhf6 19.g5 hg5 20.fg5 Nh5 21.c4 e4 22.Nc3 Ng3 23.Nd5 Qd8 24.Rg1=+ Qg5 25.Qc2 Ne5-/+ 26.0-0-0 Rab8 27.Rg3 Qg3 28.Qe4 Rb3 29.Bb2-/+ Rfb8 30.Ne7 Kf8 31.Nf5 Qf3 32.Qf3+= Nf3 33.Bg7 Kg8 34.Bc3 Be5 35.Ne7= Kf8 36.Nc6 Re8 37.Ne5+/– Ne5 38.Kc2 Rbb8 39.Rb1 Rb1 40.Kb1 f6 41.Kc2 Ke7 42.d4+- Nd7 43.Bg2 Kd6 44.Kd3 Kc7 45.Ba5 Kd6 46.Bc3?? Kc7 47.Ba5?? Kd6= ½–½. Capece,Adolivio – Romi,Massimiliano, ITA–ch, 1970.

4.Nf3 h6 5.e3 (5.a3 Nf6=) 5...Bb4 (5...Nf6 6.a3=) 6.Bg7 Rh7 7.Bc3 Bd6 8.Be5 (8.Nd4 Bg6=) 8...Nf6 (8...Be5 9.fe5 Nd7 10.Nc3=) 9.Nc3 a6 10.Rb1 (10.Nd4 Be4=) 10...b6 (10...b5 11.Nd4 Be4 12.Ne4 Be5 13.fe5 Ne4 14.Qg4=) 11.Nd4 Bg4?? (better 11...Be5 12.fe5 Ne4 13.Ne4 Be4=) 12.Bf6+- Qf6 (12...Bd1 13.Bd8 Bh5 14.Bh4+-) 13.Qg4 Rh8 (13...Rg7 14.Qh5+-) 14.Bd3 (better 14.f5 h5 15.Qf3+-) 14...e5 (14...b5+-) 15.Nd5 Qe7 (15...Qd8 16.Ne6! Qc8 17.Nec7 Qc7 18.Nc7 Bc7 19.Qc8 Bd8+-) 16.Ne7 (16.Ne7 Nd7 17.Ng6 fg6 18.Bg6 Kd8 19.fe5 Ne5 20.Qe6+-) 1–0. Janek – ostron, internet, 2016.

5.a3 c5 6.bc5 Bc5 7.e3 Bg4 8.Be2 Bf3 (8...0-0 9.Nc3=+) 9.Bf3= Nc6 10.Nc3 0-0 11.0-0 a6 (11...Na5 12.Na4 Bd6 13.Be2=) 12.Qe1 (12.Ne2 Na5=) 12...Kh8 (12...b5 13.Rb1=) 13.Rb1 b5 14.a4 b4 15.Ne2 a5 (15...Na5 16.Bd4 Bd4 17.Nd4=) 16.Ng3 (16.c4 bc3 17.Nc3 Nb4=) 16...Be7 17.Qe2 Rc8 18.Rf2 (18.c3 Qd7=) 18...Qd7 19.Qb5 Rb8 (19...Qc7 20.Rff1=+) 20.Qd3 White prepares the advance f5 20...Rfc8 21.Rc1 Qe8 (21...Kg8 22.Rb1=+) 22.Nh5 Nh5 23.Bh5 Kg8 (23...Bd6 24.f5 Be5 25.Be5 Ne5 26.Qd4=) 24.f5+= ef5 (better 24...g6!? 25.fe6 fe6+=) 25.Rf5+- (25.Qd5?! g6 26.Bf3 Qd8+=) 25...g6 26.Rd5 Rd8 (26...Rc7 27.Bg4 Rd8 28.Bf3+-) 27.Bf3 Rd5? (better 27...Rbc8+-) 28.Bd5 (28.Qd5?! Rc8+-) 28...Rd8 29.Rf1 (29.Rf1 Rd5 30.Qd5+-) 1–0. Pierre – GuestTofsie, internet, 2020.

5.b5 Bd6 6.e3 0-0 7.Be2 h6 8.0-0 c6 9.a4 Ne4 (9...a6 10.Nd4=) 10.Nc3 Nc3 11.Bc3 Qb6 (11...a6 12.Qb1=) 12.Qe1 White plans a5 12...Nd7 (12...Bc2 13.Qg3 Bg6 14.Nh4+-) 13.a5 (13.Qg3 f6 14.Nd4 Nc5 15.Nf5 ef5+-) 13...Qc7 14.Nd4 (14.Qg3 g5+-) 14...Bg6 15.a6 ba6 (better 15...c5!? 16.ab7 Qb7=) 16.bc6+- Nc5 17.Ba6 Na6 18.Ra6 Rfb8 19.Qa1 Bc5 (19...Be4 20.d3 Bg6 21.Qa5+-) 20.f5 (better 20.Nb3 Bb6 21.Bg7+-) 20...Bf5? (better 20...ef5 21.Nf5 f6+-) 21.Nf5 ef5 22.Bg7 Rb6 (22...Bd6 23.h3+- (23.Bh6?! Bh2 24.Kh1 Be5+-)) 23.Rb6 Qb6 24.Bh6 Qc6 (24...d4 25.Rf5 Qc6+-) 25.Qg7 1–0. Pereira – t4747, internet, 2020.

5.e3 Bb4-/+ 6.Be2 Bd6 (6...0-0 7.0-0-/+) 7.0-0 c5 (7...Bg4 8.h3 Bf3 9.Rf3-/+) 8.d3 (8.Nh4 Be4=+) 8...Nc6 9.h3 (9.Nh4 0-0-/+) 9...h6 (9...Qb6 10.Qc1-/+) 10.Nbd2 Qc7 11.Qe1 e5 (11...Qe7 12.Ne5-/+) 12.fe5 (12.Qg3 Nh5 (worse 12...ef4 13.Qg7 Rg8 14.Qh6=) 13.Qf2 ef4-/+) 12...Ne5-/+ 13.e4 Be6 (13...de4!? 14.de4 Be6-/+) 14.ed5= Nd5 (14...Bd5? 15.Ne5 0-0 16.Ndc4+-) 15.Ne4 Nf3 16.Bf3 0-0 17.Qh4 (17.Nd6 Qd6 18.Be5 Qd7=) 17...Rfe8 (17...Bf4 18.Rae1 c4 19.Bd4-/+) 18.Rae1 (18.Nd6 Qd6 19.Rae1 f6=+) 18...Bf4-/+ 19.Bh5 Bd6?? (19...Be3 20.Re3 Ne3 21.Nf6 Kf8 22.Nh7 Kg8 23.Nf6 Kf8 24.Nh7 Kg8 25.Nf6=) 20.c4 Be7?? (20...Bh2 21.Kh1 Qb6 22.cd5 Bd5 23.Nf6 gf6 24.Qg4 Kf8 25.Bf6 Re1 26.Qg7 Ke8 27.Re1 Kd7 28.Re7 Kc6 29.Kh2 Kb5+-) 21.Qf2+- Nf6 22.Nf6 (22.Bf6 Bf6 23.Nf6 gf6 24.Qf6 Kh7+-) 22...Bf6 (22...gf6 23.Bf6 Bf6 24.Qf6 Kh7+-) 23.Bf6+- gf6 24.Qf6 Kh7 25.Bf7 Bf7 26.Qf7 Qf7 27.Rf7 Kg6 28.Re8 Re8 29.Rb7 Rd8 30.Ra7 Rd3 31.Kf2 (31.Ra5 Rd2+-) 31...Rd2 32.Kf3 Rc2 33.Ra4 Kf5 34.g4 Ke5 35.h4 (35.Kg3!?+-) 35...Rc3+- 36.Kg2 Kf4 37.g5 hg5 38.hg5 Kg5 39.Ra8 Kf4 40.Ra4 (40.a4 Rc4 41.a5 Rc2 42.Kf1 Kf3=) 40...Ke3=+ 41.Kg3 Kd4 The isolani on c4 becomes a target 42.Kf4 Rc4 43.Ra8 (43.Rc4!? Kc4 44.Ke3=) 43...Kd3=+ 44.Ke5 Re4 (44...Rh4 45.a4=+) 45.Kd5= c4 46.Ra3 c3 47.Rc3 Kc3 48.Ke4 Kb4 49.Kd4 ½–½. Suarez,Luis Humberto – Martinez,Jorge Alexander, IRT Camp Nal Mayores Absoluto AJEDREZ B, 2015.

4.a3 Nd7 5.Nf3 h6 6.Nc3 Ngf6 7.Bg2 Be7 8.Nd4 Bg6 9.0-0 0-0 10.d3 a5 11.b5 Qc8 12.e4 c5 13.bc6 bc6 14.Re1 Bc5 15.Na4 Bd4 16.Bd4 e5 17.Nb6 Nb6 18.Bb6 Qa6 19.Bc7+= de4 20.Be5 Nd7 21.Bd6+/– Rfe8 22.de4 Ne5 23.Bf1 Qb6 24.Rb1 Qa7 25.c4 Rad8 26.c5+- Nd7 27.Qc2 Nf6 28.Bd3 Ng4 29.Kg2 Rd6 30.cd6 1–0. pierre – mycnich, internet, 2009.

4.Bg2 Bb4 5.Bg7 Be4 6.Be4 +- (6.Bh8 Bg2 7.e3 Bh1 -/+).

4.Bg2 Nc6 5.b5 Nb4 (Better is 5...Na5=+) 6.d3+/– c6 7.a3 Nd3 8.cd3 Qa5 9.Bc3 Qb5 10.Nd2 c5 11.Ngf3 d4?? (Better is 11...Ne7+-) 12.Rb1 Qd7 (12...Qa6 13.Nd4! cd4 14.Bb7 dc3 15.Ba6 cd2 16.Qd2 Be7+-) 13.Bb2 c4?? 14.Nc4 Nf6 15.Nd4 Ng4 16.Nf5 ef5 17.Ne5 Qc7 18.Ng4 fg4 19.0-0 Bc5 20.Bg7 Rg8 21.Qa4 Kd8 22.Bf6 Be7 23.Rb7 Rb8 24.Rc7 Bf6 1–0. audrey – radi8288, Live Game Caissa's Web, 2004.

4.Bg2 Nd7 5.d3 Ngf6 (5...Bb4!? 6.Nd2 Ngf6-/+) 6.a3=+ c5 7.c3 Rc8 8.Nd2 b6 (8...b5 9.Ngf3=+) 9.b5 Be7 10.c4 d4 11.a4 (11.Ngf3 0-0=) 11...0-0 12.a5 e5 13.Bf3 (13.Ngf3 Re8=) 13...Bd6 14.Bg2 (14.ab6 ab6 15.Kf1 Qe7=+) 14...Re8 (14...ba5 15.Ngf3=+) 15.Ngf3 (15.ab6 ab6 16.Ngf3 Qe7=) 15...e4 (15...ba5 16.0-0=+) 16.de4 (16.Nh4!? Be6 17.Ne4 Ne4 18.Be4 ba5 19.Qa4=) 16...Ne4=+ 17.0-0 Ndf6 (17...ba5 18.Re1=+) 18.Ne4= Ne4 (18...Be4 19.e3=) 19.Nd2 (19.Nh4 Bd7+=) 19...Nd2 20.Qd2 Qe7 (20...ba5 21.e3 Be6 22.Ra4 de3 23.fe3=) 21.ab6 ab6 (21...Qe2? 22.Qe2 Re2 23.ba7 Rb2 24.Ra6+-) 22.Rfe1 Be4 23.f3 (23.Be4 Qe4 24.e3 d3=) 23...Ba8 24.Kf1 (24.Qd3 Rcd8=+) 24...Qe3 (24...Rcd8!?=+) 25.Qe3= Re3 (worse 25...de3 26.Red1 Bf8 27.Bc1+-) 26.Bc1 (26.Ra7 Re7 27.Re7 Be7=) 26...Rc3=+ 27.f4? (better 27.Ra6=+) 27...Bg2-+ 28.Kg2 Rc4 29.Ra6 (29.Rd1 Rc2 30.Kf3 Re8-/+) 29...Rb8 (29...Bc7 30.Rd1-+) 30.e3 (30.Rd1 Rc3-+) 30...Rb4 (30...Rc2!? 31.Kf3 d3-+) 31.ed4-/+ Rd4 (worse 31...cd4 32.Ba3 Bc5 33.Bb4 Bb4 34.Rd1+-) 32.Be3 (32.Re2!?-/+) 32...Rb4-+ 33.Bc5?? (better 33.Rd1 Bf8 34.Rd7-+) 33...Bc5 (33...bc5?! 34.Rd6 h6 35.Rd7 R4b5 36.Ree7=) 34.Re5 (34.Ra7 Rb5 35.Rd1 Rb2 36.Kh3 h5-+) 34...Rb5 35.Kh3 Rb2 36.Ra7 Bg1 37.Rae7 (37.Kg4 Rh2 38.Ree7 Rf8-+) 37...h5 (better 37...Rh2 38.Kg4 g6-+) 38.Kh4 (38.Rh5 Rh2 39.Kg4 Rh5 40.Kh5 b5-+) 38...g6 (better 38...Rh2 39.Kg5 f6 40.Kg6 fe5 41.Rg7 Kf8 42.Rh7-+) 39.Kg5 (39.Re2 Re2 40.Re2 b5-+) 39...Bh2 40.Kh6 Rf8 (better 40...Kf8 41.Ra7 Bg3 42.Ree7 Bf4 43.Kh7-+) 41.Rg5 (41.R5e6 Rg2 (41...fe6?! 42.Rg7 Kh8 43.Rh7 Kg8 44.Rg7 Kh8 45.Rh7 Kg8 46.Rg7=; 41...Bg3?! 42.Rg6 Kh8 43.Rg3-/+) 42.Rg6 Kh8-+) 41...Rb3 42.Rg6 fg6 (better 42...Kh8-+) 43.Rg7= Kh8 44.Rh7 Kg8 45.Rg7 Kh8 46.Kg6?? (better 46.Rh7 Kg8 47.Rg7=) 46...Rg3 47.Kh5 (47.Kh6 Rf6 48.Rg6 Rfg6 49.Kh5 Kg7 50.f5 Rh6) 47...Rg7 (47...Kg7 48.f5 Rh8) 48.f5 Rf5 (48...Rfg8 49.f6 Rh7) 49.Kh4 Bf4 50.Kh3 Rh5 0–1. JUANKARODA (1800) – loayza28 (1830), lichess.org, 2020.

4.Bg2 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.g3 Bf5 4.Bg2 e6).

5.Nf3 (--> 3.Nf3 e6 4.g3 Nf6 5.a3).

5.Bg2 c6 6.Nf3 Nbd7 7.Nh4 Bg6 8.d3 Qc7 9.Nd2 Be7 10.Nb3 0-0 11.Ng6 hg6 12.e4 Rfd8 13.Qe2 a6 14.0-0 c5 (14...de4 15.de4 e5 16.Rfd1=) 15.c3 (15.ed5 ed5 16.Qe7 Re8+=) 15...Rac8 16.Rac1 (16.ed5 ed5 17.Rfe1 Re8+=) 16...Qb6 (16...c4 17.dc4 Qc4 18.Qc4 dc4 19.Na5-/+) 17.Na5 Rc7 18.Rfd1 Rdc8 ½–½. Vasilev,Sergey – Steer,Jozsef (1935), First Sarurday FM–B June, 2013.

5.Bg2 Bd6 6.Nf3 Nbd7 7.0-0 0-0 8.d3 c6 9.Nbd2 a5 10.c3 e5 11.Re1 Qe7 12.e4 de4 13.de4 Be6 14.Ng5 h6 15.Ne6= Qe6 16.Qe2 Nb6 17.Bf1 Na4 18.Nc4 Nb2 19.Qb2 ab4 20.cb4 Bc7 21.Qc2 Nd7 22.Ne3 Nb6 23.Red1 Rfd8 24.Rd8 Rd8 25.a4 g6 26.a5 Nd7 27.Bc4 Qf6 28.Ng4 Qg5 29.Qe2 Nf6 30.Nf6 Qf6 31.Ra3 Rd7 32.Qg4+/– Re7 33.h4 Kg7+= 34.Rd3 c5 35.bc5 Ba5?? 36.Rd6+- h5 37.Qe2 Re6 38.Be6 fe6 39.Rd7 Kg8 40.Qa2 Bc3 41.Qa8 (41…Qf8 42.Rd8 Qd8 43.Qd8 Kf7 44.Qc8+-) 1–0. BlueNoteTokyo (2365) – Oilalio (2065), Dos Hermanas internet Section, 2003.

5.Bg2 Be7 6.d3 0-0 7.Nd2 d4?? (7...c5 8.e4 Bg4 9.f3=+) 8.c4?? (better 8.Bb7 Nbd7 9.Ba8 Qa8 10.Ngf3+-) 8...c6 (8...dc3!? 9.Bc3 c6=) 9.Ngf3+= Nbd7 (9...c5!?+=) 10.Nd4+- Bg6 11.N4f3 Ng4 (11...h6 12.0-0+-) 12.0-0 Bf6 13.Rb1 Bb2 14.Rb2 Qf6 15.Qc2 White intends c5 15...Nde5 (15...e5 16.Rfb1+-) 16.Rfb1 (16.b5 Nd3 17.ed3 Bd3 18.Qd3 Qb2+-) 16...b5 (16...Rad8 17.Rb3+-) 17.c5 (17.h3 Nf3 18.Nf3 Nh6+-) 17...Rad8 18.Ne5?? (better 18.Rb3+-) 18...Qf2-/+ 19.Kh1 Ne5 (19...Ne3!? 20.Bf3 Nc2 21.Rc2 Rc8-/+) 20.Nf3 (20.Qc3 Qe3 21.Nb3 f6=) 20...Nc4 (20...Nf3!? 21.Rf1 Bd3 22.Rf2 Bc2 23.Bf3 Rd1 24.Kg2 Ba4+=) 21.Rf1= Qe3 22.dc4?? (better 22.Ra2+=) 22...Bc2-+ 23.cb5 (23.Rc2 Qa3 24.cb5 cb5-+) 23...Rd1 (better 23...Be4 24.Ra2 cb5-+) 24.Rc2 Rf1 25.Bf1 Qa3 26.bc6 Rc8 (better 26...Qb4 27.Nd2 Rc8-+) 27.Ne5 (27.Rc4 a5 (worse 27...Rc6 28.Kg2-+) 28.b5 Qb3-+) 27...Qb4 (better 27...Qa1 28.Kg2 Qe5 29.Rc4 Rc6 30.Kf2-+) 28.Bg2 (28.Nd3 Qa4 29.Rb2-+) 28…Qb1 (28...Qb1 29.Rc1 Qc1 30.Bf1 Qf1; 28...Qe1 29.Bf1 Qf1) 0–1. JUANKARODA (1705) – i8088 (1710), lichess.org, 2020.

5.Bg2 Be7 6.d3 0-0 7.Nf3 h6 8.0-0 Nbd7 9.Nbd2 c5 10.bc5 Nc5 11.a4 Rc8 12.c4 b6 13.h3 dc4 14.Nc4 Nd3 15.ed3 Bd3 16.Ne3 Bf1 17.Qf1 Bc5 18.Qe2 Qe7 19.Ne5+= Rfd8? 20.Nc6+/– Rc6 21.Bc6 Qd6 22.Rd1 (22...Qc7 23.Rd8 Qd8 24.Be5+-) 1–0. guest3515 – guest5449, ICC, 2006.

5.Bg2 Be7 6.d3 Nbd7 7.Nd2 0-0 8.Ngf3 h6 9.0-0 Rc8 10.c4 c5 11.Qa4 cb4 12.ab4 a6 13.Rfc1 dc4 14.dc4 Ne4 15.Rd1 Rc6? 16.Ne4 Be4+= 17.Ne5 b5 18.Nc6 Bc6 19.Qa6 Bg2 20.Qb5 Bd5 21.cd5 e5 22.Ra7 Nf6 23.Be5 Re8 24.d6 Bf8 25.d7 Re6 26.Bc7 (26...Qd7 27.Rd7 Nd7 28.Qd7+-) 1–0. Bendig,Frank – Frenzel,Lothar, corr SOK–92–83, 1992.