2...Na6 3.e3 c5 4.b5 Nc7 5.Bb2 d6 6.c4 Nh6 7.Nc3 Be7 8.Nf3 Bg4 9.Be2 0-0 10.h3 Be6 11.Qc2 g6 12.d4 ed4 13.ed4 cd4 14.Nd4 Nf5 15.Nf5 Bf5 16.Qd2 Bg5 17.Qd1 Qf6 18.0-0 1–0. combijack (1920) – marcelkarl (1675), gameknot.com, 2013.

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

2...Nh6 3.Bb2 Qf6 4.e3 d6 5.Be2 Qg6=+ 6.Nc3 Qg2–/+ 7.Bf3 Qg6 8.Bh5 Qf5 9.Nd5 Na6 10.f4 g6 11.Be2=+ Be6?? 12.Bd3 e4?? 13.Ba6 Qd5 14.c4 Qf5?? 15.Bb7 Rb8 16.Bc6 Bd7 17.Bd7 Qd7 18.Bh8 Qe6 19.Qa4 Kd8 20.Rc1 f6 21.Ne2 Be7 22.Nd4 Qd7 23.Qa7 Rc8 24.b5 c5 25.Qd7 Kd7 26.Nc6 Bf8 27.Bf6 Ra8 28.Ra1 Ra4 29.Ke2 Ng4 30.Bc3 Be7 31.Ne7 Ke7 32.b6 (32...Ra8 33.h3+-) 1–0. mgriffin – smeserkhani (1775), net–chess.com, 2001.

3.Bb2 Be7 4.Be5 Nf6 5.e3 0-0 6.Bb2 (---> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 0-0 5.a3 Be7 6.Bb2).

3.ab4+- a5 4.ba5 Nc6 5.Bb2 d5 (5...d6 6.e4+-) 6.Nf3 (6.e3 Nge7+-) 6...f6 7.e3 Be6 (7...Na5 8.d4 e4 9.Nfd2+-) 8.d3 (8.a6 ba6 9.Ba6 Nge7+-) 8...Nh6 (8...Na5 9.d4 e4 10.Nfd2+-) 9.Be2 (9.Qd2 Nf5+-) 9...0-0 (9...Ra5 10.Ra5 Na5 11.Ba3+-) 10.0-0 (10.Qd2 Nf5+-) 10...Na5 11.Nbd2 c5 12.c4 d4 13.ed4 cd4 14.Ne4 Nf7 15.Ba3 Re8 16.Bb4 Qb6 (16...Qc7 17.Nc5+-) 17.Bc5 (17.Qa4 Qc6 18.Ba5 Qa4 19.Ra4 b6+-) 17...Qb3? (17...Qc7 18.Qb1 Ra6 19.Ba3+-) 18.Qb3 (better 18.Qc1!? f5 19.Nd6 Nd6 20.Bd6 Nc6 21.Ra8 Ra8 22.Ne5 Qb6+-) 18...Nb3 19.Ra8 (19.Rab1 Nc5 20.Nc5 Bc8+-) 19...Ra8 20.Bd1 (20.Be7 f5 21.Neg5 Ng5 22.Ng5 Bd7+-) 20...Nc5 21.Nc5 Bc8 22.Nd2 Ra2 23.Nde4 b6 (23...f5 24.Ng3+-) 24.Nb3 Rb2 25.Re1 Bb7 26.Kf1 f5 (26...Nd8 27.f4!+-) 27.Ng3 (27.Ned2 f4+-) 27...g6 28.Re2 (28.Ne2 f4+-) 28...Rb1+/- 29.Ke1 (better 29.Rd2+/-) 29...Ba6?? (better 29...Bg2 30.Ra2 Ng5+=) 30.Ra2+- e4 (30...Bb7 31.Nf1 Bg2+-) 31.Ra6 Rb3 (31...Ne5 32.de4 Nc4 33.ef5 Nb2+-) 32.Bb3 Nd6 (32...ed3 33.c5 bc5+-) 33.c5 Nc4 34.Bc4 Kg7 35.Rb6 (35.cb6 f4 36.Nf5 Kf6 37.b7 Kg5 38.b8Q h6 39.Qd8 Kf5 40.Be6 Ke5 41.Qh8) 35...Kh6 36.Rb7 (36.c6 ed3 37.c7 Kg5 38.c8Q d2 39.Kd2 Kf4 40.Qc7 Kg4 41.Be2 Kg5 42.f4 Kh4 43.Qh7) 36...ed3 37.c6 (37.f4 d2 38.Kd2 d3 39.h4 g5 40.Rb6 Kg7 41.Nf5 Kf8 42.Rb8) 37...d2 38.Kd2 f4 (38...Kg5 39.c7 Kf4 40.c8Q d3 41.Qc7 Kg4 42.h3 Kg5 43.Qe7 Kf4 44.Qe3) 39.Kd3 (39.c7 fg3 40.c8Q gf2 41.Qf8 Kg5 42.Rb5 Kg4 43.Qf3 Kh4 44.Qe4) 39...fg3 40.Kd4 (40.hg3 Kg5 41.c7 Kf5 42.c8Q Kf6 43.f4 h6 44.Qe6) 40...gh2 41.g3 (better 41.Bg8 Kg5 42.Rh7 Kf5 43.c7 Kf6 44.c8Q h1Q 45.Qe6 Kg5 46.Qe5 Kg4 47.Be6) 41…h1Q+/-. GM_HUSARZ (1995) - maxi_sabale (2010), Rated Bullet game, lichess.org, 2015.

3.ab4+- d6 4.Bb2 Nf6 5.e3 0-0 6.Nf3 d5? (6...e4 7.Nd4+-) 7.d4 (better 7.Ne5!? Qd6+-) 7...e4 8.Nfd2 Nc6 (8...Bg4 9.Qc1+-) 9.c4 (9.b5 Ne7+-) 9...Nb4 10.c5 (10.Ba3 c5+-) 10...b6? (10...Ng4 11.Be2 Qh4 12.g3+/-) 11.Ba3 (11.cb6 a5+-) 11...Nc6? (better 11...bc5!? 12.Nb3 Rb8 13.Nc5 a5+-) 12.cb6+- ab6. FeegLood (2585) - fylozof (1825), lichess.org, 2015.

3.ab4+- Qe7 4.b5+-.

3.ab4+- Nf6 4.Bb2 Nc6 5.b5 Ne7 6.Be5 Ng6 7.Bb2 d5 8.h4 0-0 9.h5 Nf4 10.h6 Ng4 (10...g6+-) 11.hg7 Re8 12.e3 Ng6 13.Bd3 d4 14.Qf3 N4e5 (14...Qd6 15.Ne2 de3 16.de3+-) 15.Qh5 Kg7 16.Qh7 Kf8 (16...Kf6 17.Bg6 (17.Bd4?! Qd4 18.Nc3 Nd3 19.cd3 Qd3+-) 17...fg6 18.Ne2+-) 17.Qh6 (17.Bg6 Ng6 18.Ba3 Re7 19.Qh8 Nh8 20.Rh8 Kg7 21.Rd8 Rd7 22.Rd7 Bd7+-) 17...Kg8 (17...Ke7 18.Bg6 Ng6 19.Qg5 Ke6 20.Qg4 Ke7+-) 18.Bg6 Ng6 19.Qh7 (19.Ne2 Re4 20.Qh7 Kf8 21.Ba3 Ke8 22.Qg8 Kd7 23.Qf7 Ne7 24.Be7 Qe7 25.Qd5 Qd6 26.Qe4 Qf6 27.Rh7 Kd8+-) 19...Kf8 20.Ba3 Re7 21.Qh8! Nh8 22.Rh8 Kg7 23.Rd8 (23.Rd8 Re5 24.b6 cb6 25.Bb2+-) 1-0. FeegLood (2840) - TampaChess (2595), lichess.org, 2016.

3.ab4+- Qg5 4.c3 Nc6 5.e3 a5 6.ba5 Na5 7.Nf3 Nc4 (7...Qe7+-) 8.Ra8 Kd8 9.Ng5 d6 10.Bc4 (10.Bc4 Nh6 11.Qb3+-) 1–0. Fournier,Frederic (2000) – brayant1 (1660), Owl21.com, 2009.

3.Bb2?? Bb6 4.Be5 Nf6 5.Bb2 Ne4 (5...0-0 6.e3+=) 6.e3+/- 0-0 7.d3 Nf6 8.Nf3 d5 9.Be2 Re8 10.0-0 c6 11.c4 Bc7 12.cd5 Qd5 (12...Nd5 13.Qc2+/-) 13.Nc3 (better 13.Bf6!? gf6 14.Nc3+-) 13...Qd6+/- 14.Qc2 Bg4 15.g3 Nbd7 16.Nd4 Ne5 (16...Be2 17.Nce2 Qd5 18.Rac1+/-) 17.f4+/- Be2 (better 17...Ned7 18.Ne4 Qd5+/-) 18.Nce2?? (better 18.fe5 Qe5 19.Nce2 Qe3 20.Kh1+-) 18...Neg4= 19.Bc1 (19.Nf5 Ne3 20.Nd6 Nc2 21.Ne8 Re8=+) 19...Ne3 (better 19...Bb6 20.Kh1 Re3-+) 20.Be3+= Re3 21.Nf5 Rae8? Attacking the isolated pawn on d3 (better 21...Qd3 22.Ne3 Qe3 23.Kg2 Nd5=) 22.Nd6+- Bd6?? (22...Re2 23.Qe2! Re2 24.Nb7 Bb6 25.Nc5 h5+-) 23.Nc3 Bc7 24.Rad1 Bb6 25.Kg2 (25.d4 Rd8+-) 25...Ng4 (25...Bd4 26.Qc1+-) 26.h3 Nf6 (26...Re2 27.Qe2 (27.Ne2?! Ne3 28.Kf3 Nc2+=) 27...Re2 28.Ne2 Ne3 29.Kf3 Nf1 30.Rf1+-) 27.Rd2 h5 28.Re2 (28.d4 h4 29.gh4 Ne4+-) 28...h4 (28...Re2 29.Ne2 Nd5 30.Rf3 Ne3 31.Re3 Re3 32.a4+-) 29.Re3 Re3 30.Rf2 (30.gh4!? Re8+-) 30...Nh5?? (30...Rg3 31.Kh2 Bf2 32.Qf2 Rd3 33.Qc2+-) 31.Re2 (better 31.Rf3 hg3 32.Ne2+-) 31...Rg3 32.Kf1?? (better 32.Kh2 Nf4 33.Re8 Kh7 34.d4 g6 35.Qe4 Rh3 36.Kg1+-) 32...Nf4 (32...Rg1) 33.d4! g6?? (33...Bd4 34.Re8 Mate attack) 34.Re8+- Kh7 (34...Kg7 35.Qe4 Nh5 36.Qe5 Nf6 37.Ne4 Rf3 38.Ke2+-) 35.Ne2 (better 35.Qf2 g5 36.Ne4 Kh6 37.Ng3 hg3 38.Qg3 Bd4+-) 35...Rf3 36.Ke1 Nd5 37.Kd2 (better 37.Qe4 Rh3 38.Qe5+-) 37...Rf1?? (37...Ra3 38.Qc1 Rf3+-) 38.Kd3 (better 38.Qe4 Rf5 39.Rb8 Kg7+-) 38...Bc7?? (better 38...Rf3 39.Kc4 Bc7+/-) 39.Kc4 (better 39.Qc5 a6 40.Kd2+-) 39…Rf3+/- (39...Rf3 40.Kc5 Rf5+/-). CronusCR (2190) - Pil_Joo_Jeon (2455), Daily HyperBullet Arena, lichess.org, 2017. (=1.a3 e5 2.b4)

3.Bb2?? Bb6 4.e3 Qf6 5.Nf3 d6 6.c4 a6 7.c5 Ba7 8.Be5?? (better 8.Nc3+=) 8...d5?? (better 8...de5 9.Nc3 Nc6-+) 9.Bf6+- Nf6 10.Nc3 Ne4 (10...Bg4 11.d4+-) 11.Nd5 Nc3 (11...Kd8+-) 12.Nc7 Kd8 13.dc3 Kc7 14.Qd6 1-0. TwelveTeen (2410) - chesssky2 (1810), lichess.org, 2017. (=1.a3 e5 2.b4)

3.Bb2?? Bb6 4.Be5!? Nf6 5.d4+=.

3.Bb2?? Bd4 4.Bd4 ed4 5.Nf3+=.

3.bc5 Nc6 4.c3+-.

3.Bb2 b5 4.e3 d6 5.h3 (5.Bb5 c6 6.Bc4 a5+/–) 5...Be6 (5...c6 6.a4 ba4 7.Ra4=) 6.Nf3 (6.Bb5 c6 7.Be2 Ng6+/–) 6...Nec6? (better is 6...c6!?=) 7.Bb5+/– a6 8.Ba4 Bd5? (better is 8...Qf6!?+/–) 9.Nc3+- Bf3 10.Qf3 Be7 11.Bc6 Nc6 12.Qc6 Kf8 13.Nd5 Rc8 14.Ne7 Qe7 15.Qa6 Qd8 16.0-0 Ra8 17.Qe2 h5 18.a4 c6 19.b5 Ra5 20.bc6 Qc7 21.Qf3 Rc5 22.a5! Rc2 23.Bc3 Rh6 24.a6 d5 25.Qd5 Re6 26.a7 Re8 27.a8Q Ra8 28.Ra8 Ke7 29.Rfa1 1–0. thedesertfox (1900) – davidjensen, net–chess.com, 2004.

3.Bb2 d6!?=.

3.Bb2 Ng6 4.e3 Be7 5.c4 c6 6.d4 Bf6 (6...d6 7.de5 de5 8.Qd8 Bd8 9.Nf3=) 7.Nf3 e4 8.Nfd2 d5 9.Nc3 Be6 10.Be2 0-0 11.c5 Bh4 12.g3 Bg5 13.Bg4 (13.0-0 Bh3 14.Re1 Qf6=) 13...Qd7 14.Be6 Qe6 15.h4 Bd8 16.Qe2 b6 17.Nb3 Nd7 18.a4 Rb8 19.Ba3 Bf6 20.b5 Rfc8 21.Rc1 Be7 22.h5 Ngf8 23.h6 g6 24.Qa2 (24.Qb2 bc5 25.Nc5 Bc5 26.Bc5 cb5 27.Ba7 b4–/+) 24...bc5 25.dc5 Bf6 26.Ne2 Ne5–/+ 27.Nbd4 Qg4 28.Nf4 Ne6 29.Qe2? Nf4–+ 30.gf4 Nd3 31.Kd2 Qe2 32.Ne2 Nc1 33.Rc1 cb5 34.ab5 Rb5 35.c6 Rb3 36.Bd6 a5 37.c7 a4 38.Rc6 Bb2 39.Kc2 Rb7 40.Ra6 a3! 41.Nc3 Bc3 42.Kc3 f5 43.Ra3 Kf7 44.Be5 Rb6 45.Kd4=+ Ke6 46.Kc5 Rb1 47.Ra6 Kf7 48.Kd6 (48...Ke8 49.Kc6=). Kardos Szabo,Imre (2000) – Nagy,Ferenc (2055), Nyiregyhaza op, 2003.

3.Bb2 Ng6 4.Nf3 d6 5.e3 Nd7 6.c4 c6 7.Nc3 Nf6 8.Be2 Bg4 9.h3 Be6 10.Qc2 d5 11.cd5 cd5 12.Nb5 Rc8 13.Qa4 Bd7 14.Qa7 (14.Ne5 Ne5 15.Be5 a6–/+; 14.Be5 a6–/+) 14...Bc6 (better is 14...e4!? 15.Nfd4 Bc6+/–) 15.Ne5+- Ne5 16.Be5 Nd7 17.Nc7! Rc7 18.Bc7 Qc7 19.b5 Bc5 20.Qa8 Nb8 21.bc6 bc6 22.d4 Bb6 23.0-0 0-0 24.Rfc1 Qd6 25.Qb7 Bc7 26.g3 Re8 (26...Qd8 27.Bd3+-) 27.a4 (better is 27.Bb5 Re6 28.Qc8 Qd8 29.Qd8 Bd8 30.Be2+-) 27...Re6 (27...Ba5 28.Rc5 Qd8+-) 28.a5 f5 (28...Kf8 29.a6 Re3 30.fe3 Qg3 31.Kf1 Qh3 32.Ke1 Qe3 33.Qc7 Na6 34.Qd6 Qe7 35.Qe7 (35.Ra6?! Qd6 36.Rac6 Qb4 37.Kf1 Qd4=) 35...Ke7 36.Rc6+-) 29.Qc8 (29.a6 Re3 30.Qc8 Kf7 31.Qf5 Ke7 32.Qg5 Kf7 33.Qe3 Nd7 34.Qf3 Ke7+-) 29...Kf7 30.a6 Rf6 (30...Nd7 31.Qb7 Nb6+-) 31.a7 f4 32.ef4 (32.a8Q Re6 33.Ra7 Re7 34.Rc7 Qc7 35.Qc7 Rc7 36.Qb8 Re7 37.Rc6 Re8 38.Bh5 g6 39.Bg6 hg6 40.Qf4 Kg7 41.Rc7 Kh8 42.Qf6 Kg8 43.Qg7) 32...g5 33.f5 (33.a8Q Re6 34.Qab7 Re2 35.Qbc7 Qc7 36.Qc7 Re7 37.Qb8 gf4 38.Qf4 Kg6 39.Rc6 Re6 40.Re6 Kg7 41.Qf6 Kg8 42.Ra8) 33...Rh6 34.Bg4 (better is 34.a8Q!? Rh3 35.Qa3 c5+-) 34...Rf6 35.a8Q Kg7 36.Qa3 Qd8 37.Qd8 Bd8 38.Qa7 1–0. Zak,Pawel – Wojtak,Franciszek, Polanica Zdroj op–C Poland, 2006.

3.Bb2 Bg7 4.e3 d5 5.Nf3 Bg4 6.Be2 e4?? (better is 6...Nd7=) 7.Bg7+- Bf3 (7...ef3 8.Bf3 Bf3 9.Qf3+-) 8.gf3 ef3 9.Bf3 d4 (9...g4 10.Bg2+-) 10.Bh8 (10.Bb7 Nd7 11.Ba8 Qa8+-) 10...de3 (10...c6 11.Bd4 Nh6 12.Be4+-) 11.Bb7 Qd6 12.fe3 Nc6 13.Ba8 Qd5 14.Rf1 Qe5 15.Bc6 Ke7 16.Be5 Ke6 (16...f6 17.Qh5 Kf8 18.Bf6 Nf6 19.Qh7 g4 20.Rf6) 17.d4 (17.d4 f6 18.Qh5 f5 19.Qe8 Ne7 20.d5 Ke5 21.Qe7; 17.Qg4 Ke5 18.d4 Kd6 19.Qd7) 1–0. Fournier,Frederic (2450) – Akchich, echecsemail.com, 2010.

3.e3 f6 4.Bb2 Bg7 5.c4 (5.Qh5 Ke7+/–) 5...d5 (5...Nh6 6.Qh5 Nf7 7.d4=) 6.Nc3 c6 7.cd5 cd5 8.Bb5 (8.Qh5 Ke7+=) 8...Bd7 (8...Nc6 9.Qh5 Ke7 10.Rc1+=) 9.Qe2 (9.Qh5 Kf8 10.Bd7 Qd7 11.Nge2+/–) 9...d4? (better is 9...Ne7+=) 10.ed4+- a6 (10...Nh6 11.de5 fe5 12.Nf3+-) 11.Bd7 (11.de5 Ne7 12.ef6 Bf6 13.Qh5 Ng6+-) 11...Qd7 (11...Nd7 12.Ne4 Qe7 13.de5 Ne5 14.Rc1+-) 12.de5 fe5 13.Qh5 Qf7 14.Qg5 Qf6 (14...Nc6 15.Ne4 Rd8 16.Nf3+-) 15.Qf6 (15.Nh3 Nc6+-) 15...Nf6 16.Nf3 Nbd7 17.Rc1 0-0 18.0-0 b5 19.Ne5?? (better is 19.Rfe1+-) 19...Ne5=+ 20.Nb5 Nd3 21.Bf6 (21.Nc7 Nb2 22.Na8 Ra8 23.Rc6=+) 21...Nc1 (better is 21...Bf6 22.Nd6 Nc1 23.Rc1 Rad8–+) 22.Bg7= Ne2 23.Kh1 Kg7 24.Nc3?? (better is 24.Nc7=) 24…Rae8 0–1. mgriffin (1655) – ilundin, net–chess.com, 2001.

3.Nf3 f6 4.e4 b6? (4...g4!? 5.Ng1 d5 6.ed5 Qd5+=) 5.Bc4 (5.Ne5!? Nh6 6.Qh5 Ke7+-) 5...Ne7 6.d4 d6 (6...d5!? 7.ed5 g4+/–) 7.de5+- fe5?? (better is 7...Bg7 8.ed6 Qd6 9.Qd6 cd6+-) 8.Ng5 c6 9.Nf7 Qd7 10.Nh8 d5 11.ed5 a5 12.ba5 (12...Qf5 13.dc6 Qe4 14.Qe2 Qe2 15.Ke2+-; better is 12.d6!? Bg7 13.Bf7 Kf8 14.de7 Ke7 15.Bg5 Kf8+-) 1–0. andre2004 – Izzy5150, ChessWorld.net, 2005.

3.g3 Qd4 4.Nc3 Qf2?? 5.Kf2+- Bc5 6.bc5 Nh6 7.Ke1 (7.e4 Nc6+-) 7...Nf5 8.e3 Nc6 9.Nd5 Kf8 10.c3 d6 11.cd6 (better 11.Nc7 Rb8 12.e4 Nh6 13.cd6 Bg4+-) 11...cd6 12.a4 Be6 13.Bg2 (13.Nc7 Rc8 14.Ne6 fe6+-) 13...Re8 14.Ba3 Kg8 15.Nf6! (15.Nf6 gf6 16.Qb1+-) 1-0. FeegLood (2010) - Arka50 (2125), lichess.org, 2015.

3.g3 Qd4 4.Nc3 Qf2?? 5.Kf2+- Nf6 6.Ke1 (6.Kg2 d5+-) 6...d5 7.e3 c6 8.Be2 d4 9.Nf3 (better 9.Na2 de3 10.d4 Bd6+-) 9...dc3 10.dc3 (10.Ne5 cd2 11.Qd2 Be6+-) 10...Nbd7 11.Bc4 Ke7 (11...Be7 12.Ng5 0-0 13.Qf3+-) 12.Bf7! g6 (12...Kf7 13.Bb2 Combination) 13.Ba2 Bh6 14.Nh4 (14.e4!? Bc1 15.Qc1 Ne4+-) 14...Rd8 15.Nf5! gf5 16.Qe2 e4 17.Rf1 (17.Qc4 Nd5 18.Qd4 Nf8+-) 17...Ne5 18.Bb2 (18.Kf2 Nd5 19.Kg2 Nc3+-) 18...Nf3 (18...Nfg4 19.c4 Nf3 20.Rf3 ef3 21.Qf3+-) 19.Kf2?? (better 19.Rf3 ef3 20.Qf3+-) 19…Ng4-+ (19...Ng4 20.Kg2 Rd2-+) 0-1. FeegLood (2140) - Arka50 (2095), lichess.org, 2015.

3.g3 Qd4 4.Nc3 Nf6=.

3.Bb2 a5 4.c3 ab4 5.cb4 d6 6.d3 Nc6 7.Nd2 Nf6 8.Ngf3 Bg4 9.g3 Qd7 10.Bg2 Be7 11.0-0 Bh3 12.d4 Bg2 13.Kg2 h4 14.de5 hg3 15.fg3?? (better is 15.ef6 Qh3 16.Kg1 gh2 17.Kh1 Bf6 18.Bf6 gf6 19.Ne4+/–) 15...Qh3–+ 16.Kf2 Ng4 17.Ke1 Ne3 (17...Nge5?! 18.b5 Qe6 19.Qc2=; 17...Nce5?! 18.Qb3 Qh5 19.h3+=) 18.Qc1 Nf1 19.Nf1 Ne5 (19...d5 20.Ne3–/+) 20.Be5?? (better is 20.Ne5 de5 21.Qc7=) 20...de5–+ 21.Qc7 0-0?? (better is 21...Bb4 22.N1d2 Bd2 23.Kd2 e4 24.Qe5 Qe6 25.Qe6 fe6–+) 22.Qe5?? (better is 22.Qe7 Qc8 23.Qe5 Ra3 24.Ra3 Qc1 25.Kf2 Qa3 26.b5+-) 22...Bf6–+ 23.Qc7 Ba1 24.Qb7 Qe6 25.N1d2 Rae8 26.Qb5 Bc3 27.Kf2 Bd2 28.Nd2 Qe3 29.Kg2 Qd2 30.Kh3 Re2 31.a4 Rh2 32.Kg4 Re2 33.a5 Qd4 34.Kh3 Re5 35.Qc5 Rc5 36.bc5 Qc5 37.a6 Ra8 38.a7 Ra7 39.g4 Ra3 40.Kh4 Qf2 41.Kg5 Ra5# 0–1. golfx – lotlotlot, kurnik, 2011. (=1.a3 e5 2.b4 h5)

3.Bb2 d6 4.c4 Qg5 5.Nf3 Qg4 6.h3 Qf4 (6...Qc4!? 7.Nc3 c6=) 7.e3+= Qh6 8.d3 g5 9.Be2 Bg7 10.Nc3 c6 11.Ne4 Ke7 (better is 11...d5!? 12.cd5 cd5+/–) 12.Neg5+- (12.Nfg5?! f5=) 12...e4 13.Bg7 Qg7 14.Ne4 Nf6 15.Nf6 Qf6 16.g3 Qc3 17.Nd2 Be6 18.Qc1 (18.Bh5 Rh5 19.h4 Bg4–/+) 18...Qe5 19.d4 Qf5 20.Nf3 Nd7 21.Qb1 Qf6 22.Qe4 Nb6 23.0-0 (23.c5!? Nd7 24.Qc2 dc5 25.bc5 Kd8+-) 23...Kd7 (23...Nc4 24.Bc4 d5 25.Bd5 cd5 26.Qf4 Qf4 27.ef4 (worse is 27.gf4 Bh3 28.Rfc1 Rac8+=) 27...Bh3 28.Rfe1 Kf6 29.Re5+/–) 24.Kh2 (better is 24.c5!? Nd5 25.Kh2+-) 24...Rae8 25.Qh4 Qf5? (better is 25...Qh4!? 26.Nh4 Bc4+/–) 26.c5 (26.e4 Qg6 27.Rac1 Bg4+-) 26...Na4? (better is 26...Bc4 27.Ng1 Be2 28.Ne2 Nd5+-) 27.cd6 Qc2 28.Ne5 Kd6 29.Bd3 Qc3 30.Qf4 Ke7 31.Rfc1 Qd2 32.Rc2 Qc2 33.Bc2 Nc3 34.Qg5 Kd6 35.Bf5 Reg8 36.Qf6 Rf8 37.Nf7! Rf7 38.Qe6 Kc7 39.Qf7 Kb6 40.Qc4 Nb5 41.a4 Nc7 42.Qc5 Ka6 43.Bd3 b5 44.ab5 Kb7 45.Qa7 Kc8 46.b6 Nd5 47.b7 Kd7 48.b8Q Ke6 49.Qe5 1–0. Fournier,Frederic (1775) – paulitha, Active, 2011.

3.Bb2 d6 4.e3 a6 (4...Nf6 5.Nf3=) 5.Bc4 (5.d4 ed4 6.ed4 Qe7 7.Be2 Bg4=) 5...Nf6 6.Nf3 (6.d4 ed4 7.Bd4 Nc6=) 6...Nbd7 (6...e4 7.Nd4+=) 7.0-0 (7.d3=) 7...Nh7 (7...e4 8.Ne1=) 8.g3 (8.e4!?+=) 8...Ndf6 (8...Nb6 9.Be2=) 9.Nc3 (9.Be2 Be7=) 9...Bg4 (9...d5 10.Be2 Bd6 11.Re1+=) 10.Be2= Bf3 (10...Bh3!? 11.Re1 Ng5=) 11.Bf3+= Be7? (better is 11...d5+=) 12.Bb7+- Ra7 13.Bc6 Kf8 (13...Nd7 14.d4+-) 14.d4 (14.f4 Kg8+-) 14...Ng5 (14...a5 15.b5+-) 15.de5 (15.h4 Nh3 16.Kg2 Qc8+-) 15...de5 16.Qd8 Bd8 17.Rad1 (better is 17.h4 Ne6 18.Nd1+-) 17...Ke7? (17...Be7 18.f4 ef4 19.ef4+-) 18.Nd5 (18.f4 ef4 19.ef4 Ne6+-) 18...Nd5? (18...Kd6 19.Ba8 Ra8 20.Nb6 Kc6 21.Na8 Nf3 22.Kg2 e4+=) 19.Rd5 (19.Bd5?! c6 20.Bg2 f6+-) 19...f6 (19...a5 20.Re5 Ne6 21.Rd1+-) 20.Rd7 (20.f4 Ke6 21.fg5 hg5+-) 20...Ke6 21.f4 (worse is 21.Rg7 Be7 22.f4 Rh7+-) 21...ef4 (21...Be7 22.fg5 hg5+-) 22.ef4 (22.ef4 Nh3 23.Kg2 Nf4 24.Rf4 Be7 25.Re4 Kf5 26.Ree7 Rg8 27.Be4 Kg5 28.Rg7 Rg7 29.Rg7 Kh5 30.Bf3) 1–0. Wall,Bill – Shursen, internet, 2004.

3.c4 b6 4.Nc3 Nf6 5.d3 g5 6.Bb2 c5 7.Nf3 d6 8.bc5 bc5 9.e3 a6 10.Be2 Nc6 11.0-0 g4 12.Nd2 Bg7 13.Rb1 h5 14.Nb3 Be6 15.d4 cd4 16.ed4 ed4 17.Nd4 Nd4 18.Qd4 0-0 19.Nd5 Bd5 20.cd5 Re8 21.Bd3 Re5 22.Bc4 Ne8 23.f4 f6?? 24.fe5+- fe5 25.Qe4 Nf6 26.Qg6 h4 27.Bc1 Qe8 28.Rf6 g3 29.Rd6 Qg6 30.Rg6 gh2 31.Kh2 a5 32.Rb7 e4 33.Rgg7 Kh8 34.Rh7 Kg8 35.d6 Kf8 36.Rh8 1–0. losertoo (1860) – valerypavlovich (2120), net–chess.com, 2006.

3.c4 Nf6 4.e3=.

3.d4 ed4=+ 4.Qd4 d5 5.Nc3 Nf6 6.e3 Nc6 7.Bb5 Bd7 8.Bc6=+ Bc6 9.b5 Bd7 10.Nd5 Bb5?? 11.Qe5+- Be7 12.Nc7 Kf8 13.Nb5 Nd7 14.Qf5 g6 15.Qd5 Bc5 16.Bb2 Rg8 17.0-0-0 Qh4 18.g3 Qa4 19.Qd7 a6 20.Nc7 Qd7 21.Rd7 Rc8 22.Nf3 Bb6 23.Nd5 Rc6 24.Nb6 Rb6 25.Rd8 (25...Ke7 26.Rg8+-) 1–0. marus1 – BullPit, internet, 2001.

3.ba5 c5 4.Nc3 Qa5 5.Nf3 Nc6 6.e4 Nf6 7.Rb1 Be7 8.Bc4 0-0 9.0-0 Nd4 (better is 9...d6!?=) 10.Ne5+/– d6 11.Nf3 Bg4 12.Rb7 Qd8 13.a4 Nh5 14.Nd5 Nf3?? (better is 14...Bh4 15.Be2 Ne2 16.Qe2 Ra4+/–) 15.gf3+- Bc8 (15...Bh3 16.Ne7 (16.Re7?! Bf1 17.Kf1 Nf4 18.Rf7 Rf7 19.Nf4 Ra4 20.Bf7 Kf7+-) 16...Kh8 17.Re1+-) 16.Ne7 (worse is 16.Re7 Be6 17.Rb7 Bd5 18.ed5 Nf4+-) 16...Kh8 17.Nc8 Qc8 18.Rf7 Rf7 19.Bf7 Nf4 20.d4 Nh3 21.Kg2 Ra7 (21...Ra4 22.dc5 Ra7 23.Qd5+-) 22.Bh5 Ra4 23.Bg4 (23.Bg4 Nf2 24.Rf2+-) 1–0. Fritz 11 – budu, internet, 2011.

3.ba5 Nf6 4.Bb2 Nc6 5.e3 Be7 6.Nf3 e4 7.Nd4 0-0 8.Bc4 Ra5 9.Nc6 dc6 10.h3 Rg5 11.g4 Nd5 12.Nc3 Bf6 13.Qe2 Nc3 14.Bc3 Bc3 15.dc3 Qf6 16.0-0 Bg4 17.hg4 Qg6 18.f4?? (better is 18.f3 ef3 19.Qd3 Rg4 20.Kf2 Rg2 21.Ke1–+) 18...Rg4 19.Kf2 (19.Kh1 Rh4 20.Qh2 Rh2 21.Kh2 Qh5 22.Kg3 Qc5–+) 19...Rg2 20.Ke1 Qg3 21.Kd2 Rd8 22.Kc1 Re2 23.Be2 Qe3 (23...Qe3 24.Kb2 Qe2–+) 0–1. tflk (1755) – forsetinn (2215), gameknot.com, 2014.

3.Bb2 d5 (--> 1.b4 e5 2.a3 d5 3.Bb2 a5).

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

3.Bb2 Qe7 (--> 1.b4 e5 2.Bb2 Qe7 3.a3 a5).

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

3.b5 c5 4.Bb2 d6 5.e3 Nf6 6.c4 Be7 7.Nc3 Be6 8.d3 0-0 9.Nf3 h6 10.Be2 Nbd7 11.0-0 Nh7 (11...Qc7 12.Qb3=) 12.Ne4 f5 13.Ng3 Qe8 14.d4 e4 15.Nd2 Ndf6 16.f3 Qg6 17.Qc2 d5 18.Qb3 (18.fe4 de4 19.d5 Bd7+/–) 18...Rad8 (18...a4 19.Qc2=) 19.fe4 (19.cd5!? Bd5 20.Bc4 cd4 21.fe4 fe4 22.Bd4+/–) 19...Ne4= 20.Nde4 de4 (20...fe4 21.cd5 Bd5= (worse is 21...Rd5 22.Bc4 a4 23.Qa4+/–)) 21.d5 Bd7 22.Be5 Bd6?? (better is 22...Qg5+/–) 23.Bh5+- Be5 (23...Qh5 24.Nh5 Be5+-) 24.Bg6 Ng5 (24...Ba1 25.Ra1 Rf6 26.Bh7 Kh7 27.Qc3+-) 25.Rad1 Bd6 (25...Bg3 26.hg3 Rf6 27.Bh5+-) 26.Nf5 (26.Nf5 Bf5 27.Bf5 Nf3 28.gf3 Rf5 29.fe4+-) 1–0. Kotlowski,Tomasz – Szymanski,Leszek, Poznan op–B Poland, 2004.

3.b5 f5 4.Bb2 d6 5.d4 e4 6.h4 (6.d5 Nf6=) 6...Nf6 7.e3 Be7 8.g3 (8.d5 0-0=) 8...0-0 9.Nh3 c6 10.Nf4 d5 11.c4 Bd6 (11...cb5 12.cb5 Qd6 13.a4=) 12.Qb3 (12.Nc3 Bf4 13.gf4 cb5 14.Nb5 Bd7=) 12...Bf4 13.gf4 Kh8 (13...a4 14.Qb4=) 14.h5 (14.Nc3 b6=) 14...h6 (14...dc4 15.Qc4 Nd5 16.Nc3=) 15.Be2 (15.Nc3 b6=) 15...Nbd7 16.Nc3 Nb6 (16...dc4!? 17.Bc4 cb5 18.Bb5 Nb6=) 17.c5+= Nbd7 18.a4 White prepares b6 18...Re8 19.0-0-0 Nf8 (19...Ng4 20.Rdf1=) 20.Rdg1 (20.b6 Ng4 21.Rdf1 Be6+=) 20...Qe7 (20...Ne6 21.b6+/-) 21.b6+= Be6 22.Bd1 N8d7 23.Ne2 Ng4 24.Rg2 Nc5? (better 24...Ndf6!?+=) 25.dc5+- Qc5 26.Qc3 Qc3 27.Bc3 c5 28.Ng3 d4 (28...Nf6 29.Rhg1 Rac8 30.Ba5+/-) 29.ed4+- cd4 30.Bd4 Rac8 31.Kb1 Red8 32.Bb2 Rc6 33.Nf5! Bf5 (33...Rd1 34.Rd1 Bf5 35.Rd8 Kh7+-) 34.Bg4 (worse 34.Rg4 e3 35.Ka1 Bg4 36.Bg4 ef2-/+) 34...Rb6 35.Rc1 Bh7 36.f5 (36.Ka1 Rb4 37.Bd1 Rd7 38.Rc8 Bg8+-) 36...Rb4 37.Rgg1 (better 37.Rc2 Bg8 38.Kc1+-) 37...e3+/- 38.f3 (38.fe3!? Rg4 39.e4 Rg1 40.Rg1 Rd7+/-) 38...e2 39.Rge1 (better 39.Kc2!?+/-) 39...Rd2= 40.Re2?? (better 40.Rc8 Bg8 41.Rc2 Rd1 42.Rc1=) 40...Rbb2-+ 41.Ka1 Re2 42.Rc8 (42.Re1 Ra2 43.Kb1 Reb2 44.Kc1 Bg8-+) 42...Bg8 43.f6 (43.f4 Rf2 44.f6 Rbd2 45.fg7 Kg7 46.Rg8 Kg8 47.Be6 Kg7 48.Bf5 Rf4 49.Bd3 Rd3 50.Kb1 Rf2 51.Kc1 Rg3 52.Kd1 Rg1) 43...Ra2 (better 43...Rbd2 44.fg7 Kg7 45.Rg8 Kg8 46.Bf5 Re1 47.Bb1-+) 44.Kb1 Reb2 (better 44...gf6!? 45.Rg8 Kg8 46.Be6 Re6 47.Ka2-+) 45.Kc1 gf6 (45...Rf2 46.Rg8 Kg8 47.Be6 Kf8 48.Ba2 Ra2 49.fg7 Kg7 50.Kd1-+) 46.Be6 Rc2! 47.Rc2 Rc2 48.Kc2 Be6 49.Kc3 Bd7 50.Kd4 Ba4 51.Kc5 Bc6 52.Kc4 a4 (better 52...b5!? 53.Kc5 b4 54.Kc6-+) 53.Kb4 a3 (53...f5!? 54.f4 b6 55.Kc3-+) 54.Ka3 Bf3 55.Kb4 Bh5 56.Kc3 Bf3 (better 56...b5 57.Kb4 f5 58.Kc5-+) 57.Kd2 Bc6 58.Ke3 f5 59.Kf2 Kg7 60.Kg3 Kf6 61.Kf4 Kg6 62.Kg3 Kg5 63.Kf2 f4 64.Kg1 White threatens to counter with Kh4 64...Kg4 65.Kh2 f3 66.Kg1 Kg3 67.Kf1 f2 (67...h5 68.Ke1 f2 69.Ke2 h4 70.Ke3 h3 71.Kd4 h2 72.Kd3 f1Q 73.Kc3 Qa1 74.Kd3 Bb5 75.Ke4 h1Q 76.Kf5 Qh5 77.Ke4 Qf3) 68.Ke2 Kg2 69.Ke3 f1Q (better 69...h5 70.Kd4 h4 71.Ke3-+) 70.Kd4 Qf3 (70...Qf6 71.Kc4 Qe5 72.Kb3 Qe3 73.Kb4 h5 74.Kc4 b6 75.Kb4 Bd5 76.Kb5 Qc5 77.Ka4 Qa5) 71.Kc5 Qd5 72.Kb6 (72.Kb4 Qd4 73.Kb3 b5 74.Kc2 b4 75.Kb1 Be4 76.Ka2 Qe3 77.Kb2 Qa3) 72...Bd7 (72...Qd4 73.Kc7 Qe5 74.Kc8 b5 75.Kd8 Qd6 76.Kc8 Qd7 77.Kb8 Qb7) 73.Kc7 Bf5 74.Kb8 Bg4 (74...Qd6 75.Ka8 Qa6 76.Kb8 h5 77.Kc7 b5 78.Kd8 Qd6 79.Ke8 Bg6) 75.Ka7 (75.Kc7 Qc6 76.Kb8 b6 77.Ka7 Qc7 78.Ka6 Be2) 75...Bf3 76.Kb8 Kg3 (76...Qd8 77.Ka7 Qc7 78.Ka8 b5) 77.Ka7 (77.Kc8 Qe6 78.Kc7 b6 79.Kd8 Qf7 80.Kc8 Bc6 81.Kd8 Qd7) 77...Kf4 (77...Qc5 78.Kb8 b6 79.Ka7 Qc7 80.Ka6 Be2) 78.Kb8 (78.Kb6 Qc6 79.Ka7 b5 80.Kb8 Qb7) 78...Ke4 (78...Qd8 79.Ka7 Qc7 80.Ka8 b5) 79.Ka7 (79.Kc8 Qa5 80.Kd7 Bg4 81.Ke7 Qc7 82.Kf6 Bh5 83.Ke6 Be8 84.Kf6 Qe5) 79...h5 (79...Qd6 80.Kb7 Kf5 81.Kc8 Be2 82.Kb7 Ba6 83.Ka7 Qc6 84.Kb8 Qb7) 80.Kb8 h4 (80...Qc6 81.Ka8 b6 82.Kb8 Ke3 83.Ka7 Qb7) 81.Ka7 (81.Kc7 Qa5 82.Kc8 Qa7 83.Kc7 b5 84.Kc6 Kd4 85.Kd6 Qg7 86.Ke6 Bg4 87.Kd6 Qd7) 81...h3 (81...Qc6 82.Kb8 b6 83.Ka7 Qc7 84.Ka6 Be2) 82.Kb8 (82.Kb6 Qc6 83.Ka7 b5 84.Kb8 Qb6 85.Kc8 Bg4) 82...b5 (82...Qd8 83.Ka7 h2 84.Kb7 Kd4 85.Ka6 Kc5 86.Ka7 Qb6) 83.Ka7 (83.Kc7 Qc5 84.Kd7 Bg4 85.Ke8 Qc7 86.Kf8 h2 87.Ke8 Bh5 88.Kf8 Qf7) 83...b4 (83...Qc6 84.Kb8 Qb6 85.Kc8 Bg4) 84.Kb8 (84.Kb6 b3 85.Kc7 b2 86.Kc8 b1Q 87.Kc7 Qbb7) 84...b3 (84...Qc6 85.Ka7 Qc7 86.Ka6 Be2) 85.Ka7 (85.Kc7 b2 86.Kc8 b1Q 87.Kc7 Qbb7) 85...b2 86.Ka6 b1Q 87.Ka7 Qbb7 0-1. is_er_nog_hoop (2450) - BeepBeepImAJeep (2860), lichess.org, 2017.

3.b5 f6 4.e4 Bc5 5.Nc3 c6 6.Na4 Be7 7.d4 d6 8.Be3 Be6 (8...ed4 9.Bd4 c5 10.Bc3+/–) 9.de5 de5 10.Nb6 Nd7 11.Na8 Qa8 12.bc6 bc6 13.Nf3 Nh6 (better is 13...a4+-) 14.Bh6 gh6 15.Be2 (15.Nd2 Bf7+-) 15...Rg8 16.0-0 Bh3 (16...Kf7 17.Qd2+-) 17.Nh4 f5 (17...Kf8+-) 18.Qd3 (18...Bg4 19.Bg4 fg4 20.Nf5+-) 1–0. miquelstone – Simon de Balle, ChessWorld.net, 2005.

3.b5 Qf6 4.Nc3+= a4 (4...b6 5.e4+-) 5.Nd5 (5.g3!?+-) 5...Qd6+= 6.e4 c6 (6...Nf6 7.Nf6 Qf6 8.Bb2+=) 7.Nc3+- Nf6 8.Nf3 Be7 (8...Qc5 9.Rb1+-) 9.d4+- ed4 (9...Ng4 10.Bb2+-) 10.e5 Qe6 11.Ne2 Ne4? (better 11...Nd5 12.Ned4 Qg4+-) 12.Nf4+- Qf5 (12...Qh6 13.Nd5!! Qg6 14.Nc7 (worse 14.Ne7 Ke7 15.Qd4 d5+-) 14...Kf8 15.Na8 cb5 16.Nc7+- (16.Qd4 Bc5 17.Qd3 Bf2 18.Kd1 Nc6+-)) 13.g4 Nf2 (13...Nc3 14.gf5 Nd1 15.Kd1 d6+-) 14.Kf2 Qg4 (14...Bh4 15.Nh4 Qe5 16.Nf3+-) 15.Bh3 Bh4 (15...Qh3 16.Nh3 cb5 17.Rg1+-) 16.Ke2 (16.Ke2 Qg6 17.Ng6 hg6 18.Qd4+-) 1–0. Janek (1890) – erbuez, internet free game, 2018.

4.Bb2 Bc5 5.e3 Nf6 (5...d6 6.d4 ed4 7.ed4=) 6.Nf3 (6.Be5 d5+=) 6...0-0 (6...e4!? 7.Nd4 Ra8=) 7.Ne5+= b5 (7...d5 8.Qf3+=) 8.Nc3 (8.d4 Be7+/–) 8...d6 (8...c6 9.d4 Be7 10.Bd3+=) 9.Nd3+/– Nc6? (better is 9...c6+/–) 10.Nc5+- dc5 11.Nb5 (11.Bb5 Qd6+-) 11...Ba6 (11...Bg4 12.f3 Be6 13.Be2+-) 12.Nc3 (12.c4!? Bb7+-) 12...Bf1 13.Rf1 c4 14.Qe2?? (14.Qf3 Qd7+-) 14...Rg5? (better is 14...Nd4 15.ed4 Re8=) 15.Qc4+- Ne5 16.Qe2 Rg2 17.d4 Ng6 18.0-0-0 Rh2+= 19.Nb5 Rh5 20.d5 Rd5+= 21.Bf6 Qf6?? 22.Rd5+- Ne7 23.Rd7 Nf5 24.Nc7 h6 25.Rfd1 Rb8 26.R1d3 Qb2 27.Kd1 Kh7 28.Ke1 Qb6 29.Rf7 Qg6 30.Rdd7 Rb1 31.Kd2 Rb2 32.Ne8 h5 33.Rg7 Ng7 34.Rg7 Qg7 35.Ng7 Kg7 36.Qh5 (36...Rb1 37.f4+-) 1–0. mgriffin (1615) – elf (1625), net–chess.com, 2001.

4.Bb2 Nc6 5.c3 Nf6 6.e3 d5 7.Qb3 Bd6 8.Bb5 0-0 9.Ne2 Na7 10.Bd3 e4 11.Bc2 c5 (better 11...Nc6-+) 12.d3?? (better 12.c4 dc4 13.Qc4-+) 12...ed3 13.Bd3 c4 14.Bc4 dc4 15.Qc4 Be6 16.Qd3 Rd5 (better 16...Rb5!? 17.Qd2 Qb6 18.Bc1-+) 17.Qc2 (17.Nd4 Nc6 18.c4 Ne5-+) 17...Bf5 18.Qc1 Nc6 19.Nd2 (19.c4 Rd3 20.c5 Bc7-+) 19...Ne5 20.f3 (20.Nf4 g5 21.Nd5 Nd3 22.Kf1 Nd5 23.Qd1-+) 20…Nd3 (20...Nd3 21.Kf1 Nc1 22.Bc1 Re8-+) 0-1. neytronus (2215) - Screw (2165), Rated Blitz game, lichess.org, 2016.

4.Bb2 Nc6 5.c4 Qh4 6.e3 d6 (6...Qe7 7.Nc3=) 7.Nf3 Qf6 (7...Qe7 8.Bc3 Ra6 9.c5=) 8.Nc3 Nge7 (8...Be6 9.Qb3 b6 10.Nd5+=) 9.Nb5 (9.d4 ed4 10.Nb5 Bg4+=) 9...Kd8+= 10.d4 (10.Bc3 Ra6=) 10...e4 11.Nd2 Qg6 12.d5 Ne5 13.Be5 de5 14.d6 cd6 15.Ne4 Nf5 16.Qd2 Ra6 (16...Ra8 17.c5+=) 17.c5 Rc6 (17...Ra8 18.Rd1+/–) 18.Rd1 (18.Na7 Rc7+/–) 18...Ke8 (18...Nh4 19.Nbd6 Bd6 20.Nd6 Ng2 21.Bg2 Qg2 22.Nf5 Kc7+=) 19.cd6 Kd7 (19...Nd4 20.Nd4 (20.ed4?! Qe4 21.Qe2 Qe2 22.Be2 Bd6+/–) 20...ed4 21.Qd4+-) 20.Qd5 Qe6 (20...Nh4 21.Na7 f5 22.Nc6 bc6 23.Nc5 Kd8 24.Qc6 Qf7 25.Qb6 Ke8 26.Qb5 Kd8 27.Qa5 Ke8 28.Bb5 Qd7 29.Bd7 Bd7 30.Qa8 Kf7 31.Nd7 e4+-) 21.Nc5 Rc5 22.Qc5 Bd6 (22...Nh4 23.Qc7 Ke8+-) 23.Qc7 Ke8 24.Nd6 Kf8 25.Qd8 (25...Qe8 26.Qe8) 1–0. cgits (2580) – marv (2220), net–chess.com, 2005.

4.Bb2 Nc6 5.e4 Nf6 6.Nc3 Bc5 7.h3 0-0 8.Nf3 d5 9.ed5 Nd5 10.Bc4 (10.Ne4 Bd4 11.Nd4 ed4–/+) 10...Nf4 (10...Nc3 11.Bc3 e4–/+) 11.Bf1? (11.0-0 Qd6 12.Ne1 Qg6–/+) 11...Nd4 (better is 11...e4!? 12.Nh2 Qd4–+) 12.Ne4 Qd5 13.Nc5 Rc5–+ 14.Bc3?? Re8 15.Qb1 Nf3 16.gf3 e4 17.Kd1 Rc3 18.Qc1 e3 19.Bd3 Qf3 (20.Ke1 ef2 21.Kf1 Qg2) 0–1. grahamtrue (2070) – kode (2345), net–chess.com, 2008.

4.Bb2 Nc6 5.e4 Qh4 6.Qf3 (6.Nc3 Bc5 7.g3 Qf6=) 6...Bc5 7.Bc4 (7.g3 Qf6=) 7...Nf6 8.Nc3 Nd4 9.Qd1 Nc2!! 10.Qc2 Qf2 11.Kd1 Qg2 12.Nd5 (12.Nb5 Qh1 13.Bf7 Kf7 14.Qc4 Kg6 15.Qc5 Ne4 16.Qe5 Qg1 17.Kc2 Qc5 18.Qc5 Nc5 19.Rg1 Kh5 20.Nc7–+) 12...Nd5 13.Bd5 (13.ed5 Qh1 14.Qc3 Qg1 15.Kc2 Qd4 16.Qa5 Qc4 17.Qc3 Qa4 18.Qb3 Qe4 19.Qd3 Qd3 20.Kd3 d6–+) 13...Qh1 (13...Qf1) 14.Ke2 (14.Qc3 A) 14...Bg1 15.Qa5 Bb6 16.Kc2 Qa1 17.Qa8 (17.Ba1?? Ba5 18.Be5 f6–+) 17...Qb2 18.Kb2+=; B) 14...Qh2 15.Qa5 Qg1 (15...Bg1?! 16.Qc7 0-0 17.Be5 Qh5 18.Kc2–+) 16.Kc2 Bb6 17.Bf7 Kf8 18.Qe5 Qc5 19.Qc5 Bc5–/+) 14...Qg2 (14...Qh2 15.Kd3 Qg3 16.Kc4 Bg1 17.Bc3 b5 18.Kb4–+) 15.Kd3 Qh2 (15...Bg1 16.Qc3 Qf3 17.Kc2–+) 16.Rf1 (16.Qc3 Qg3 17.Kc4 A) 17...Bg1 18.Qg3 Bd4 19.Qg7+- (19.Bd4 ed4 20.Qg7 Rf8+-); B) 17...Qc3 18.Bc3 b6 19.Ba5 Ba6 (19...ba5?! 20.Kc5 h5 21.Nf3–+) 20.Kb3 ba5–+) 16...f6 (16...Bg1!? 17.Bf7 Kd8 18.Qd1–+) 17.Qc3 b6 18.Kc2 Ba6 19.Bc4 Bb7 20.Bd5 Qg2 21.Qf3 Qf3 22.Rf3 Bd5 23.ed5 Bg1 24.Rg3 Rd5 25.Rg1 g5 26.d3 h5 27.Kd2 h4 (28.Rc1 c6–+) 0–1. coolerdude – ChessNo1, ChessWorld.net, 2005.

4.Nc3 Nc6 5.Nf3 Nf6 6.e4 Bc5 7.Bc4 d6 8.0-0 0-0 9.d3 h6 10.Bd2 Ra7 11.h3 Ra8 (worse is 11...Ba3 12.Nb5 Bc5 13.Na7 Na7 14.Be3 Be3 15.fe3+/–) 12.Qe2 Kh7 (12...Ba3? 13.Nb5+-) 13.Be3 Be3 (13...Ba3? 14.Nb5+-) 14.Qe3 Be6 15.Be6 fe6 16.Rfb1 b6 17.Nb5 Qd7 18.a4 Ra5 19.d4 ed4 20.Nfd4 Nd4 21.Qd4 Raa8 22.e5 de5 23.Qe5 Rac8 24.Re1 Rfe8 25.Rad1 Qe7 26.Nd4 Qc5 27.Qc5 bc5 28.Ne6 c4 29.Kf1 Kg8 30.a5 Kf7 31.Nc5 Ra8 32.a6 Re1 33.Ke1 Ke7 34.Ke2 Ra6?? (34...c6+-) 35.Na6 c6 36.Nb4 Ke6 37.Nc6 c3 38.Nd4 Kf7 39.Kd3 Nd5 0–1. usingprogram (2035) – 2165chess (1670), kurnik, 2012.

4.Nc3 d5 5.a4 (5.e3 Nf6=+) 5...d4–/+ 6.Ne4 Nc6 7.Nf3 (7.e3 Qd5 8.Ng3 Nf6–/+) 7...f5–+ 8.Neg5? (better is 8.Ng3–+) 8...e4 9.d3 (9.Bb2 h6 10.Nd4 Nd4–+ (< 10...Qg5 11.Nc6 bc6 12.Bc3–+; < 10...hg5 11.Nc6 bc6 12.Bc3–+)) 9...ef3 10.Nf3 Bb4 11.Bd2 Qe7 12.Qc1 Bd2 13.Qd2 Qb4 14.Qb4 Nb4 15.Kd2 Nf6 16.Nd4 c5 17.Nb3–/+ Ra7 18.Nc5 b5 19.c3 Nc6=+ 20.g3 Nd7 21.Nd7 Bd7–/+ 22.Bg2 ba4 23.Rhb1 Ke7 24.Rb6 Rc8 25.Kc2 Kd8 26.e3 Kc7 27.Rbb1 Ne5 28.Kd2 Rd8 29.Ke2? Nd3! 30.Kd3 Bc6 31.Ke2 Bg2 32.Rb2 g5 33.f3 g4 34.fg4 fg4 35.Kf2 Bf3 36.h3 a3 37.Rc2 Be4 38.Re2 gh3 39.Kg1 Rb8 40.Kh2 Rb2 41.Ra2 Re2 42.Re2 Rb7 43.Kh3 Rb2 44.Re1 Rb1 45.Re2 Bf3 46.Ra2 Rh1 47.Rh2 Rh2 48.Kh2 a2 (49.g4 a1Q–+) 0–1. grahamtrue (2070) – hasant (1915), net–chess.com, 2008.

4.c4 Nf6 5.Nf3 Nc6 6.Nc3 Be7 7.e3 0-0 8.d4 ed4 9.ed4 Bb4 10.Bd2 Ra3 11.Ra3 Ba3 12.d5 Re8 13.Be2 Ne5 14.0-0 Nf3 15.Bf3 Bb4 16.Qb3 Bc3 17.Bc3 d6 18.Ra1 Ne4 19.Ra8 Nc3 20.Qc3 Qe7 21.h3 Kf8 22.Qe3 Qe3 23.fe3 Bd7 24.Ra7 Rb8 25.g4 Ke7 26.Kg2 g5 27.Kg3 h6 28.Be4 f6 29.Bc2 Kd8 30.Kf3 b5 31.cb5 Bb5 32.Ke4 (better is 32.Bf5!?=) 32...Bf1–/+ 33.Kf5 Bh3 34.e4 Rc8 (better is 34...h5!?–/+) 35.Ra3= Bf1 36.Kf6 Be2 37.Rh3 c6 38.Rh6 cd5 39.Rh8 (39.ed5 Rc2 40.Kg5 Rd2 41.Rd6 Ke7 42.Re6 Kd7=) 39...Kc7 40.Rc8 Kc8 41.ed5 (41.Kg5?! d4 42.Bb3 d3=) 41...Bg4? (better is 41...Kc7 42.Bf5 Kb6 43.Kg5 Kc5+-) 42.Bf5 (42.Kg5?! Bf3=) 42...Bf5 (42...Kd8 43.Bg4 Kc7+-) 43.Kf5 g4 44.Kg4 Kc7 45.Kf5 Kb6 46.Kf6 Kb5 47.Ke7 Kc5 48.Ke6 1–0. soidog (2020) – kupovgeorge (1610), gameknot.com, 2014.

4.e4 Ra4 5.Qf3 Qf6 (5...Nf6 6.Nc3 Ra8 7.Bc4=) 6.d3 (6.Nc3 Ra5=) 6...Qf3 (6...Nc6!?+=) 7.Nf3= Nc6 8.Nc3 Ra5 9.Nd5 Bd6 10.a4 Bb4 (10...b5!?=) 11.Nb4+= b5?? (better is 11...Nb4 12.Bd2 Nc2 13.Kd1 Na1 14.Ba5 f6 15.Bc7 Nb3+/–) 12.Nc6+- dc6 13.Bd2 (better is 13.Ne5 Ne7+-) 13...Ra6 (13...Ra4 14.Ra4 ba4 15.Ne5+-) 14.a5 f6 15.h4 (15.d4!? g5 16.h3 ed4 17.Nd4 Ne7+-) 15...Bg4 16.Be2 Bf3 17.Bf3 c5 18.0-0 c4 (18...Ke7 19.Bh5+-) 19.dc4 bc4 20.Be2 Rc6 (20...Ne7 21.Rfd1+-) 21.a6 Ne7 22.a7 Kf7 23.a8Q Ra8 24.Ra8 Ke6 (24...Ng6 25.h5 Nf4 26.Bf4 ef4 27.Rd1+-) 25.Rfa1 (25.Bb4 c3+-) 25...Kd7 (25...c3 26.Be3+-) 26.Bg4 Kd6 27.Bb4 (27.Rd8 Kc5 28.Ra5 Kb6 29.Rb8#) 27...Rc5 28.Bc5 (28.Rd8 Kc6 29.Bd7 Kb7 30.Bc5 Nc6 31.Rb1 Nb4 32.Rb4 Ka6 33.Ra8) 28...Kc5+- 29.c3 Nc6 30.Bd7 (30.R8a6 f5 31.Bf5 Kd6 32.Rd1 Ke7 33.Rd7 Ke8 34.Ra8 Nd8 35.Rad8) 30...Ne7 31.R8a5 Kd6 32.Rd1 Nd5 33.Rdd5 Ke7 34.Ra7 (34.Bf5 g6 35.Rd7 Ke8 36.Ra8) 34...Kf7 (34...h5 35.Bf5 Kf8 36.Ra8 Ke7 37.Rd7) 35.Rc7 (35.Bf5 h6 36.Rd7 Ke8 37.Ra8) 35...Kg6 (35...Ke7 36.Bf5 Ke8 37.Rc8 Ke7 38.Rd7) 36.g4 (36.Be8 Kh6 37.Rdd7 f5 38.Rg7 fe4 39.Rh7) 36...h5 (36...Kh6 37.f4 g6 38.Be6 ef4 39.g5 fg5 40.hg5 Kh5 41.Rh7) 37.Bf5 Kh6 38.g5! fg5 (38...fg5 39.Rd6 Mate attack) 39.Rd6 g6 40.Rg6 1–0. monas – karlsdad, ChessWorld.net, 2012.

4.e4 Nf6 5.Nc3 d5 6.ed5 Nd5 7.Qf3 Nc3 8.Qc3 Rc5 9.Qe3 Nc6 10.Bd3 Bd6 11.Ne2 0-0 12.0-0 f5 13.Nc3 (13.Rb1 e4 14.Bb5 Rf7+=) 13...Nd4 (13...e4 14.Bb5–/+) 14.f4 e4 (better is 14...Ne6!? 15.fe5 Be5–/+) 15.Qd4= ed3 16.Qd3 Be6 17.a4 (better is 17.Re1 Rc6 18.Qf3=) 17...Bc4–/+ 18.Qf3 Bf1 19.Kf1 Qa8 20.Ba3 Qa6 21.Kg1 Rc4 22.Qd5 Kh8 23.Bd6 cd6 24.Nb5 Ra4 25.Ra4 Qa4 26.Nd6 Qa1 (26...Qc2?? 27.Nf7 Kg8 28.Nh6 Kh8 29.Qg8 Rg8 30.Nf7; 26...Qf4?? 27.Nf7 Kg8 28.Nh6 Kh8 29.Qg8 Rg8 30.Nf7) 27.Kf2 Qf6 28.g3 b6 29.c4 h5 30.d4 Kh7 31.Ke3 Kg6 32.Qe5 Qd8 33.d5 Qc7 34.Qe6 Rf6 35.Qe8 Kh7 (better is 35...Kh6 36.Qh8 Kg6 37.Qe8 Kh6 38.Qh8 Kg6 39.Qe8=) 36.Qh5+/– Kg8 37.Qe8 (37.Nf5 Qc5 38.Kf3 Qf8+-) 37...Rf8 (37...Kh7 38.Qh5 Kg8 39.Nf5 Qc5 40.Kf3 Qf8+-) 38.Qe6+/– Kh8 39.Kd3 Qa7 40.Qg6 (better is 40.Nf5 Qa3 41.Ke2 Qa2 42.Kf3 Qc4 43.Ne7 Qf1 44.Kg4+-) 40...Qa3 41.Kd4 Qb2 42.Kd3 Qa3 43.Kd4 (43.Ke2 Qc3+=) 43...Qa1 44.Kd3 Qa3 45.Kd4 Qb2 46.Kd3 Qh2?? (46...Qa3 47.Ke2 Qb3+/–) 47.Nf5+- Qh7 48.Nh4 Rf6 49.Qh7 Kh7 50.Ke4 g6? (better is 50...Kg8+-) 51.Nf3 Kg7 52.Ng5 Rd6 53.Ke5 Rd7 54.d6 Ra7 55.Ke6 Ra3 56.d7 Re3 57.Kd6 Rg3 58.d8Q Rd3 59.Kc7 Rd8 60.Kd8 Kf6 61.Kd7 Kf5 62.Ne6 Ke4 63.Kd6 Kd3 64.Kd5 Kc3 65.Nf8 Kb4 66.Ng6 1–0. Borawski,Jakub – Grabarczyk,Edmund, Class Bialystok Autumn Poland, 2007. (=1.a3 e5 2.b4 a5 3.ba5 Ra5)

4.a6 Ra6 5.e3 Ra8 6.Bb2 Nf6 7.Nc3 (7.Bb5 e4=) 7...d5=+ 8.d4 (8.Nb5 Bg4 9.Nf3 e4=+) 8...e4 9.f4 ef3 (9...Bg4 10.Qd2-/+) 10.gf3 Nh5 11.Qe2 Be7 12.Qg2 Bh4 13.Kd2 0-0 (13...Be7 14.f4 Ra5 15.Be2=+) 14.Bd3 (14.f4 Re8 15.Nd5 Ne7=+) 14...f5 15.Nge2 f4 16.ef4 (16.e4 de4 17.Ne4 Nf6=+) 16...Nf4 17.Nf4 Bg5 18.Nce2 Bf4 19.Nf4 Rf4 20.Rhg1 Qf6 Will d4 fall? 21.Rae1 (21.Qg5 Qg5 22.Rg5 Rf3 23.Rag1=) 21...Bd7 (21...Bf5 22.Qg5 Bd3 23.Qd5 Kh8 24.cd3 Rf3 25.Qd7 Rf2 26.Kc1 Qf4 27.Kb1 Rb2 28.Kb2 Qd2 29.Kb1 Qd3 30.Kc1 Qa3 31.Kd2 Qb2 32.Ke3 Ra3 33.Kf4 Qh2 34.Kg4 Qh3 35.Kg5 h6 36.Kg6 Qd7 37.Re3 Re3 38.Rb1 Qe6 39.Kh5 Rh3) 22.c3 (22.Qg5 Kh8+=) 22...Na5 (22...Bg4 23.Bc1 Bf3 24.Qg3-/+) 23.Kc2 (better 23.Qg5!? Qg5 24.Rg5 Nb3 25.Kc2=+) 23...Ba4 (23...Bf5!?-/+) 24.Kb1=+ Rf3 (24...g6 25.h4 Rh4 26.f4=) 25.Re6 (better 25.Be2 Bc2 26.Ka1=+) 25...Rf2?? (better 25...Qf7 26.Re7 Qe7 27.Qf3 Qe6=) 26.Rf6+- Rg2 27.Rg2 Re8 28.Rf1 (28.Bf5 Kh8 29.Re6 g6 30.Re8 Be8+-) 28...b6 (28...Bb3 29.Rg5+-) 29.Rfg1 (29.Bc1 Nc4+-) 29...g6 30.Bc1 c5 31.Bh6 Nc4 (31...Re7 32.Rf2 Rf7 33.Rgf1+-) 32.Bc4 dc4 33.h4 (better 33.dc5 bc5 34.Rf2 Bd7+-) 33...cd4 34.h5 1-0. zekun1c39s (2035) - zaja89 (2145), Rated Blitz game, lichess.org, 2014.

4.Bb2 Ra5 5.c4 Nf6 6.Bc3 A) 6...Ra8 A1) 7.Nf3 e4 (7...Bc5 8.e3 Ne4 9.Bb2 Qe7 10.Be2 0-0 11.d4 ed4 12.ed4 Bb6=) 8.Nd4 Be7 9.Qb3 0-0 10.Nf5 d6 11.Ne7 Qe7 12.e3 Ne5–/+; A2) 7.e3 d5 8.d4 ed4 9.ed4 Qe7 10.Qe2 Ra4 11.cd5 Nd4 12.Qe7 Be7=; B) 6...Ra6 B1) 7.Nf3 d5 (7...d6 8.e3 e4 9.Nd4 Bd7 10.Qb3 Rb6 11.Qc2 Ne5 12.Be2 Be7=; 7...e4 8.Nd4 Be7 9.e3 0-0 10.Qc2 Nd4 11.Bd4 d6 12.d3 c5=; 7...Ne4 8.Bb2 d6 9.e3 Be7 10.d4 ed4 11.Nd4 0-0 12.c5 Ra5=) 8.cd5 Qd5 9.Qc2 Ra7 10.Bb2 e4 11.Bf6 ef3 12.e4 Qd7–/+; B2) 7.e3 Ra7 (7...Ne4 8.Bb2 d6 9.Nf3 Be7 10.d4 ed4 11.Nd4 0-0 12.c5 Ra5=; 7...d6 8.Be2 e4 9.d4 ed3 10.Bd3 Ne5 11.Nf3 Nd3 12.Qd3 Qe7=; 7...Ra8 8.Nf3 e4 9.Nd4 Ne5 10.f4 Nd3 11.Bd3 ed3 12.Qb3 d5=) 8.Nf3 d6 9.d4 e4 10.d5 ef3 11.dc6 fg2 12.Bg2 b6=+; C) 6...Ra7 7.Nf3 Bc5 (7...Ne4 8.Bb2 d6 9.e3 Nc5 10.d4 Na4 11.Ra2 e4 12.Nfd2 Bf5=; 7...d5 8.Ne5 Ne5 9.Be5 dc4 10.e3 b5 11.d3 Ng4 12.Bc3 Qh4=; 7...e4 8.Nd4 Be7 9.d3 0-0 10.e3 Nd4 11.Bd4 c5 12.Bb2 d5=+) 8.Ne5 Bf2 9.Kf2 Ne5 10.Be5 Ng4 11.Kg1 Ne5 12.e3 d6=+.

4.Bb2 Ra5 5.c4 Nf6 6.Nc3 Bc5 7.Nd5 0-0 (7...d6 8.e3 0-0 9.f4 Nd5 10.cd5 Ne7 11.Qb3 f6 12.Ne2 Qe8–/+) 8.e3 d6 9.Qf3 Nd5 10.cd5 Ne7 11.Bc4 Ra4 12.d3 c6–/+.

4.Bb2 Ra5 5.c4 Nf6 6.Nc3 Bc5 7.e3 0-0 (7...d5 8.cd5 Nd5 9.Nf3 0-0 10.Ne5 Ne5 11.Nd5 Qd5 12.d4 Nc4=+) 8.Qb3 (8.Nf3 e4 9.d4 ef3 10.dc5 fg2 11.Bg2 Rc5 12.Nd5 Ne8=+) 8...Re8 9.Nge2 (9.Bd3 d6 10.Ne4 b6 11.Nf3 Bg4 12.Qc2 h6=+) 9...b6 (9...d6 10.Na4 Ba7 11.Bc3 Ra6 12.Nb2 Bb6–/+) 10.Nd5 Bb7 11.Nec3 (11.Rb1 Na7 12.Nec3 Nd5–/+) 11...Ra8 (11...Nd5 12.cd5 Ne7=+) 12.Be2 (12.Bd3 Nd5=+) 12...Na5 (12...Nd5=+) 13.Qc2 Ba6 (13...Nd5 14.cd5 c6 15.Bd3 cd5 16.Bh7 Kh8 17.Bd3=+) 14.Nf6= Qf6 (worse 14...gf6 15.Qf5 c6 16.Bd3+=) 15.Ne4 (15.0-0 Qe6 (worse 15...Bc4 16.Bc4 Nc4 17.Nd5+-; worse 15...Nc4 16.Nd5 Qd6 17.Bc4+-) 16.Nd5 Ra7=) 15...Qe6 (15...Qg6 16.d3=+) 16.Rc1 (16.Nc5 bc5 17.d3 Qg6=) 16...Be7=+ 17.Ng3 c6 (17...Bb7 18.Bd3 g6 19.0-0=+) 18.0-0 (18.Bd3 h6=) 18...Rac8 (18...d5 19.d3=) 19.f4 (19.Bd3 g6=) 19...d5 20.f5 (20.cd5 cd5 21.Qa4 Be2 22.Ne2 Nc4 23.Be5 A) worse 23...Na3 24.Nd4 b5 25.Qa7+- (25.Ne6?! ba4 26.Ng7 Rc1 27.Rc1 Ra8+-); B) 23...Ba3=+) 20...Qd7=+ 21.f6 Bf6 22.Rf6 gf6 23.Nh5 Re6 (23...Qd8 24.Qf5 Re6 25.cd5 Be2 26.de6 Bh5 27.e7 Qe7 28.Qc8 (28.Qh5 Rd8=+) 28...Kg7 29.Qa6+-) 24.Bg4 (24.Qf5 Qd8 25.cd5 Be2 26.de6 Bh5+-) 24...Qe7 (24...Qe8 25.Rf1 Nc4 (worse 25...dc4 26.Be6 Qe6 27.Nf6 Kf8 28.Be5+-) 26.Be6 Qe6 27.Nf6 Kg7 28.Qh7 Kf8+=) 25.Rf1?? (better 25.cd5 Rd6 26.Bc8 Bc8 27.Qe4+-) 25...Rf8 (25...Nc4 26.Be6 fe6 27.Nf6 Kh8 28.Rf3=) 26.Qf5 (26.d3 dc4 27.Be6 fe6= (worse 27...Qe6 28.Nf6 Kg7 29.Qf2+-)) 26...Nc4 27.Bd1 (better 27.Be2 Ne3! 28.Qf3–/+) 27...Rd8 (27...Rc8 28.Bc2 Kf8 29.Qh7–/+) 28.Qg4? (better 28.Bc2 Kf8 29.Ng7=) 28...Kf8–+ 29.Qg7 (29.Bc3 Ne3! 30.de3 Bf1 31.Kf1 Qd6–/+) 29...Ke8 30.Nf6 Rf6 31.Rf6 Qf8 (31...Bc8 32.Bc3 Be6=+ (32...Na3? 33.Bb4 c5 34.Ba3+-)) 32.Qh7= Nb2 33.Rf7 Qf7 (33...Nd1? 34.Rf8 Kf8 35.Qf5 Ke7 36.Qe5 Kd7 37.Qg7 Kd6 38.Qg3 Kd7 39.Qg4 Kc7 40.Qd1+-) 34.Bh5 Qh5 35.Qh5 Kd7 36.Qf5 (36.Qf5 Kd6 37.Qf6 Kd7 38.Qe5+=). Dergatschova Daus,Anna (2275) – Bakhmatov,Eduard (2310), 14th Sommerpokal, Recklinghausen GER, 2003.

4.Bb2 Ra5 5.c4 Nf6 6.Nc3 Bc5 7.Nf3 0-0 (7...d6 8.e3 e4 9.Ng5 Qe7 10.f4 h6 11.Nd5 Nd5 12.cd5 hg5=+) 8.e3 e4 9.d4 ef3 10.dc5 fg2 11.Bg2 Rc5 12.Nd5 Ne8=+.

4.Bb2 Ra5 5.c4 Nf6 6.e3 A) 6...Be7 7.Bc3 (7.d4 ed4 8.ed4 d5 9.Nf3 0-0 10.Ne5 Re8 11.Be2 dc4 12.Nc6 bc6=+; 7.Nf3 e4 8.Nd4 Nd4 9.Bd4 b6 10.Be2 d5 11.Qc2 dc4 12.Bc4 0-0=+; 7.Be2 d5 8.Bc3 Ra8 9.cd5 Qd5 10.d3 Qd6 11.Nd2 Be6 12.Ngf3 0-0=+) 7...Ra7 (7...Ra8 8.Nf3 e4 9.Nd4 0-0 10.d3 Ne5 11.Nf5 Nd3 12.Bd3 ed3=+) 8.Nf3 d6 9.Be2 0-0 10.0-0 e4 11.Nd4 Nd4 12.Bd4 c5=+; B) 6...d5 7.cd5 Rd5 (7...Qd5 8.Nc3 Qd7 9.Bb5 Ne4 10.a4 Nd6 11.Nf3 f6 12.d4 ed4=; 7...Nd5 8.Qb3 Nb6 9.Bb5 Bd7 10.Bc3 Qg5 11.Bf1 Rd5 12.a4 Na5=+) 8.Bc4 Rc5 9.Qb3 Qd7 10.Bb5 Qg4 11.g3 Bd6 12.d4 Be6–/+.

4.Bb2 d5 5.Nc3 d4 6.Ne4 f5 7.Ng3 Nf6 8.e3 Bc5 9.Nf3 f4 10.Ne2 de3 11.fe3 e4 12.Nfd4 fe3 13.Nc6 bc6 14.de3 Qd1 15.Rd1 Ke7 16.Nd4 Bd4 17.Rd4 Be6 18.Be2 Rab8 19.Bc1 c5 20.Ra4 Bd5 21.a6 Rb1 22.0-0 c6 23.a7 Ra8 24.Ra5 c4 25.a4 Kd7 26.g4 h6 27.Ba3 Rf1 28.Kf1 Ke6 29.c3 Nd7 30.h4 h5 31.gh5 Ne5 32.Kg2 Nf7 33.Bg4 Kf6 34.Bc5 Nh6 35.Bd4 Kf7 36.Bc8 Rc8 37.a8Q Ra8 38.Ra8 Nf5 39.a5 Nh4 40.Kf2 c5 41.Ra7 Ke6 42.Bg7 Kd6 43.h6 Ke6 44.h7 Ng6 45.Ra6 Bc6 46.Rc6 Kf7 47.Rg6 Kg6 48.h8Q Kf7 49.Qf8 Ke6 50.Qe8 Kd6 51.a6 Kc7 52.Qe7 Kb6 53.a7 Ka5 54.a8Q Kb5 55.Qeb7# 1–0. EnginMax20 – Mustang13, computer chess game, 2001.

4.Bb2 d6 5.Nf3 Na5 6.e3 Ne7 7.Nc3 Ng6 8.h4 h6 (8...Bg4!? 9.d4 h5+=) 9.h5= Ne7 10.d4 e4 (10...ed4 11.Nd4 Nac6 12.Bb5=) 11.Ne4+/– Be6 12.Bd3 Nc4 13.Rb1 Na3 (13...b6 14.Qc1+/–) 14.Ba3 Ra3 15.Rb7 Bd5 16.Rb1 c6 17.0-0 g5?? (better is 17...Be6+-) 18.Nf6 1–0. Fritz 11 – valenok37, internet, 2014.

4.Bb2 Nf6 5.Nf3 Bc5 6.e3 (6.Be5? Ne5 7.Ne5 Bd4 (worse is 7...Ra5 8.d4 Bb4 9.c3+=) 8.Nf7 Kf7–+) 6...e4 7.Ne5 Na5 8.d4 Be7 9.Nd2 0-0 10.Be2 d6 11.Nec4 Nc4 12.Bc4 d5 13.Be2 Bd6 (13...b5 14.0-0–/+) 14.c4+= c6 15.c5 Bc7 16.0-0 Rb8 17.Bc3 g6 18.f4 ef3 19.Bf3 Re8 20.Re1 Ne4 21.Be4 de4 22.Nf1 Qg5 23.Re2?? (better is 23.Qe2=) 23...Bg4–+ 24.a4 (24.Qc2 Be2 25.Qe2 b6 26.cb6 Rb6–+) 24...Re6 (24...Qh5!? 25.Raa2–+) 25.Qd2 Be2 26.Qe2 Qd8 27.a5 Ra8 28.a6 Ra6 29.Ra6 ba6 30.Qa6 Qb8 31.Qe2 Qb3 32.Qd2 Qb1 33.Qf2 Bd8 34.Qe1 Qe1 35.Be1 f5 36.g3 Kf7 37.Bc3 Re7 0–1. Fournier,Frederic – Bentout,Pascal, Open Paris FRA, 1998.

4.e3 d5 5.Bb5 Ra5 6.Bc6 bc6 7.d4 Bd6 8.Bd2 Ra6 9.Ne2 Qg5 10.0-0 Bh3 11.Ng3 Be6 12.Qe2 Rb6 13.e4 Qf6 14.ed5 cd5 15.Nh5 Qg6 16.de5 Bg4 17.Qe3 Bh5 18.ed6 Kd7 19.dc7 Rc6 20.Ba5 Rc2 21.Re1 Nf6 22.Qe7 Kc6 23.Nd2 Ra8 24.Re6 fe6 25.Qe6 Kb7 26.Rb1 Rb2 27.Rb2 Ka7 28.Qb6# 1–0. Bestia05 – Mustang13, computer chess game, 2001.

4.Bb2 Nc6 5.Nf3 Bd6 =+.

4.Bb2 Nc6 5.Nf3 e4 6.Nd4 Nd4 7.Bd4 c5 8.Bb2 Qa5 9.e3 Bd7 10.c4 Qb6 11.Qc2 Ba4 12.Qc1 d4 13.d3 f5 14.de4 fe4 15.Be2 Nf6 16.0-0 Bd6 17.ed4 cd4 18.Re1 0-0 19.Nd2 Qc5 20.Rb1 Qe5 21.Nf1–/+ Bc5 22.Bf3 Bc6 23.Ng3 Rfe8 24.Kh1 Qd6–+ 25.Bd1 Ba3 26.Nf5 Qb4 27.Re2 e3 28.Ba3 Qa3 29.fe3–/+ Be4 30.Nd4 Bb1 31.Qb1 Re3 32.Re3 Qe3 33.Nc2? Qd3 34.h3 Qf1 35.Kh2 Rd8 36.c5 Rd1 37.Qb3 Kf8 38.Qe3 Nh5 39.c6 Qh1# 0–1. Pal,Antal – Trigance,Eric, corr ICCF TT–4–90 SF, 1995.

4.Bb2 Nc6 5.g3 Ra5 6.Nf3 e4 7.Nd4 Qf6 8.Bc3 Bc5–+ 9.Nf3 d4 10.Ba5 Na5 11.Bg2 ef3 12.Bf3 Qb6 13.d3 Qb2 14.Nd2–/+ Nf6 15.a4 Bb4 16.Rc1 Bh3 17.e3 0-0 18.Rb1 Qa3 19.Ra1 Qc3 20.Ke2 de3 21.fe3 Re8 22.Qc1 Qc5 23.e4 Nd5 24.Nb1 f5 25.Rd1 fe4 26.de4 Qc4 27.Rd3 Re4 28.Be4 Qe4 (29.Qe3 Qg2 30.Qf2 Bg4 31.Rf3 Bf3 32.Kd3 Qf2 33.c3 Qe2 34.Kd4 Nc6#) 0–1. GLChess207e – SOS031199, computer chess game, 2000.

4.Bb2 Bd6 5.Nf3 Nc6 6.e3 =+.

4.Bb2 Bd6 5.Nf3 Nd7 6.a6 ba6 7.Nc3 =+.

4.e3 Bd6 5.d4 Nf6 6.Bd2 ed4–/+ 7.ed4 0-0 8.Nf3 Nc6 9.Bb5 Re8–/+ 10.Kf1 Bd7 11.Bc6 Bc6 12.Kg1 Ne4 13.Bb4 Qe7 14.Ne5 Bb4 15.ab4 Qb4 16.Nc6 bc6 17.f3 Ng3! 18.hg3 Re1 19.Kh2 Rd1 20.Rd1 Qb2 21.Ra3 Qc2 22.Nc3 Qb2 23.Rda1 Qd2 24.Rd1 Qh6 25.Kg1 Qe3 26.Kh2 f5 27.Nb1 Qh6 28.Kg1 Qd6 29.Ra4 Qg3 30.Nc3 Qg5 31.Kf1 Qe3 32.Ne2 Re8 33.Ra2 c5 34.dc5 Qc5 35.a6 Qc4 36.Rdd2 Qb4 37.Rdb2–/+ Qf8 38.a7 Ra8 39.Rb7 h5 40.Rab2+= h4 41.Rb8 Ra7 42.Rf8 Kf8 43.Rd2 c6 44.Rc2 Ra1 45.Kf2 Ra6 46.Nd4 f4 47.Nc6 Kf7 48.Nb4 Rd6 49.Rc7 Kf6 50.Ke2 g5 51.Kd3 Kf5 52.Kd4 Re6 53.Kd5 Re2 54.Rc2 Re7? 55.Kd4 Re8 56.Nc6 Re3 57.Kd5 Rd3 58.Nd4 Kg6 59.Rc6 Kf7 60.Ke5 Rd2 61.Ne6 Kg6 62.Nf4 Kh7 63.Rc7 Kh6 64.Ne6 g4 65.fg4 Rf2 66.Rc6 Kh7 67.Nf4 Rb2 68.g5 Kg8 69.g6 Kg7 70.Nh5 (70...Kf8 71.g7 Ke7 72.g8Q Rb5 73.Kf4 Rb4 74.Kf3 Rb3 75.Qb3 Kd8 76.Qe6 h3 77.Rc8#) 1–0. COMP – COMP, 2001.

4.e3 Nf6 5.Bb2 Bd6 6.Nf3 =+.

4.e3 ba3 5.Na3 Nc6 6.Nf3 f6 7.Nc4 (7.d4 ed4 8.Nd4 Nd4 9.Qd4 d5=+) 7...Ra1-/+ 8.Qa1 b5 9.Na5 Ba6?? (better 9...Nb4 10.Kd1 c6-/+) 10.Nc6+- dc6 (10...Qc8 11.Na5+-) 11.Qa6 Qd7 (11...Ne7+-) 12.Qa8 Kf7 13.Bd3 (13.Be5 Ne7+-) 13...Bd6 (13...Qd5 14.e4 Qd6 15.Be2+-) 14.Qa2 (14.Be4!? g6+-) 14...Ke7 (14...Qe6 15.Qe6 Ke6 16.Be4+-) 15.0-0 Nh6 16.Rd1 Nf7 17.Be4 (17.Ra1 Qg4+-) 17...c5? (better 17...f5 18.Bd3 e4 19.Bg7 Rg8+/-) 18.d4 c4 (18...Qg4 19.Bc6 cd4 20.ed4+-) 19.de5 Ne5 20.Ne5 fe5 21.Be5! Qe6 (21...Be5 22.Rd5 Double attack (22.Rd7 Pinning; 22.Rd7 Deflection; 22.Rd5 Decoy)) 22.Bd6 cd6 23.Qa7 Kf6 (23...Qd7 24.Qd4 Re8 25.Qg7 Kd8 26.Qf6 Kc7 27.Ra1 Re4 28.Ra7 Kc6 29.Rd7 Kd7 30.Qf5 Re6 31.Qb5 Kd8 32.Qb8 Kd7 33.Qb7 Kd8 34.Qh7+-) 24.Qd4 (better 24.Qa1 Kf7 25.Bd5+-) 24...Qe5 25.Qd6 (25.Qb6 Ke6+-) 25...Qd6 26.Rd6 Ke5 27.Rd4 Ra8 (27...Ke6+-) 28.f4 Ke6 29.Ba8 1-0. TwelveTeen (2520) - visitvenus (2230), lichess.org, 2016.

4.e3 ba3 5.Na3 d6 6.Nf3 Be6 7.Nb5 (7.d4 e4 8.d5 Bg4-/+) 7...Ra1-/+ 8.Qa1 c6 9.Nc3 g6 (9...b5 10.d4 b4 11.Ne4-/+) 10.Qa7 Bg7 (10...b6!?=+) 11.Qb7= Ne7 12.h4 (12.Ng5 0-0=) 12...h6 13.h5 g5 14.Bd3 0-0 15.Ne4 (15.0-0 Bg4=+) 15...Nd5 (15...g4!? 16.Nh4 Nd7-/+) 16.Nfg5 Qb6?? (better 16...hg5 17.h6 Bh8=) 17.Qb6+- Nb6 18.Ne6 fe6 19.Nd6 N8d7 20.Nc4 (20.Be4 Nd5+-) 20...Nd5 (20...Rb8 21.Nb6 Rb6 22.Bc1+-) 21.Bg6 Rb8 22.Ke2 Nc5 (22...Rb4 23.d3 N7b6 24.Ba3 Nc3 25.Kf3 e4 26.Kg4+- (26.Be4?! Rc4 27.dc4 Nc4+/-)) 23.Ba3 (23.Be5 Rd8+-) 23...Na6 (23...Nd7 24.Bd6 Ra8 25.Rb1+-) 24.Bd6 Rb5 (24...Ra8 25.Rb1 e4 26.Rb7+-) 25.Be5 (better 25.Ra1!? Ndc7+-) 25...Be5 26.Ne5 Nc3 27.dc3 Re5 28.Ra1 Nc7 (28...Nc5 29.Ra8 Kg7 30.Ra7 Kf8 31.f4+-) 29.Ra7 (better 29.c4+-) 29...Nd5 30.c4 (better 30.Kd3!? Rg5+-) 30...Nf4 31.Kf3 Ng6 32.hg6 Rg5 (32...Rf5 33.Ke2+-) 33.Rc7 Rc5 34.e4 (34.Ke4 Rg5+-) 34...Rc4 35.Kf4 (35.Kg4!? Rc5+-) 35...Rc2 36.f3?? (better 36.Kf3+-) 36...Rg2+= 37.Rc6 Rg6 38.Ke5 h5 39.f4 h4 (39...Kh7!?+=) 40.f5+/- Rh6 41.fe6 Kg7 42.e7 Rc6 43.e8Q Rg6 (43...Rh6 44.Qd7 Kg8 45.Qh3+-) 44.Kf4 Kh6 (44...h3 45.Qd7 Kf8 46.Qh3+-) 45.Qe7 (45.Qh8) 45...Rg7 (45...h3 46.Kf5 Rg2 47.Qh4 Kg7 48.Qh3 Rf2 49.Ke6 Rf6 50.Kd5+-) 46.Qf6 Kh7 47.Qf5 (47.Qh4!? Kg6+-) 47...Kg8 48.Qh5 Rf7 49.Ke3 Rh7 50.Qh4 (better 50.Qe8 Kg7 51.e5+-) 50...Rh4-+ 51.e5 (51.Kd3 Kg7-+) 51...Rh7 52.e6 Kf8 53.Ke4 Ke7 54.Kd5 Rh6 55.Ke5 Rg6 56.Kd5 Rf6 57.Kd4 Re6 58.Kd5 Rd6 59.Kc5 Kd7 60.Kc4 (60.Kb4 Kc6 61.Kc4 Rd7 62.Kb4 Kd5 63.Kb5 Rb7 64.Ka6 Rb4 65.Ka5 Kc5 66.Ka6 Kc6 67.Ka7 Ra4 68.Kb8 Ra5 69.Kc8 Ra8) 60...Rc6 (60...Kc6 61.Kb4 Rd4 62.Kc3 Kc5 63.Kb3 Rd3 64.Kb2 Kb4 65.Kc2 Kc4 66.Kb2 Rd2 67.Kc1 Kc3 68.Kb1 Rd1 69.Ka2 Rc1 70.Ka3 Ra1) 61.Kb4 Kc7 62.Kb5 Rb6 63.Ka5 (63.Kc5 Rd6-+) 63...Kb7 (63...Kc6 64.Ka4 Kc5 65.Ka3 Kc4 66.Ka2 Kc3 67.Ka1 Kc2 68.Ka2 Ra6) 64.Ka4-+ Kc6 (64...Kc6 65.Ka5 Rb5 66.Ka4 Kc5 67.Ka3 Kc4 68.Ka4 Rd5 69.Ka3 Rd2 70.Ka4 Ra2; 64...Ka6 65.Ka3 Ka5 66.Ka2 Ka4 67.Ka1 Kb3 68.Kb1 Rc6 69.Ka1 Rc1) 0-1. TwelveTeen (2695) - Farmville (2680), Time forfeit, 2018.

4.e3 Nc6 5.Nf3 e4 6.Nd4 Nf6 7.Bc4 (7.ab4 Ra1 8.Ba1 Bb4-/+) 7...d5 (7...Nd4 8.ed4 d5 9.Be2-+) 8.Bb5 Bd7 9.Bc6 bc6 10.Nc6?? (better 10.0-0-/+) 10...Bc6-+ 11.Rg1 (11.0-0 Bb5 12.d3 b3 13.cb3 Bd3-+) 11...Kd7 (11...ba3!? 12.Na3 Bd6 13.h3-+) 12.Qf3 0-1. TwelveTeen (2745) - opperwezen (2635), lichess.org, 2018.

4.e3 d6 5.g3 ba3 6.Ba3 Nf6 7.h3 (7.Ne2 Be7–+) 7...Be7–+ 8.Bg2 0-0 9.Nc3 Na6 (9...Nc6 10.f4–+) 10.d3 Rb8 11.Rb1 (11.Bb2 b5–/+) 11...c6–+ 12.Ne4?? (better is 12.d4–+) 12...Ne4 13.Be4 f5 14.Bg2 Be6 15.Ne2?? d5 16.Be7–/+ Qe7 17.d4 e4 18.Nf4 Nc7 19.0-0 g5 20.Ne2 Qd7 21.f4. beammeupscotty (2115) – malaysianisme, net–chess.com, 2004.

4.e3 Nf6 5.Nf3 (5.ab4!? Ra1 6.Ba1 Bb4 7.Be5=) 5...e4-/+ 6.Ng5 (6.Nd4 Nc6-/+) 6...Nc6 (6...d5 7.h4-+) 7.Bb5 (7.ab4 Ra1 (7...Bb4?? 8.Ra8 d5 9.c4+-) 8.Ba1 d5=+) 7...ba3 8.Na3 Ra3?? (8...d5 9.h4-+) 9.Ra3?? (better 9.Ba3 Ba3 10.Ra3+/-) 9...h6 (9...Ba3 10.Ba3 h6 11.Nh3-/+) 10.Nf7=+ (10.Nf7 Kf7 11.Ra8=+) 1-0. Jasugi99 (2715) - opperwezen (2790), lichess.org, 2019. (=1.a3 e5 2.b4 a5 3.Bb2 ab4)

4.Be5= b3 5.cb3 Nc6 6.Bb2 d5 7.Nf3 Nf6 8.e3 Bd7 9.Bd3 Bg4 10.h3 Bh5 11.0-0 Ne4 12.g4 Bg6 13.Bb5 f6 14.Nd4 Qd7 15.d3 Ng5 16.f4 Nh3 17.Kg2 h5 18.f5 Bf7 19.Kh3 hg4 20.Kg2 Bd6 21.Rh1 Rh1 22.Kh1 0-0-0 23.Qg4 Rh8 24.Kg1 Qe7 25.e4 Qe5 26.Bc6 Rh1 27.Kf2 Qh2 0–1. Delfi 1.40 – Gaviota022, computer chess game, 2001.

4.Be5 Nc6 5.Bb2 Nf6–/+ 6.e3 d5 7.Nf3 Bd6 8.d4 (8.ab4 Ra1 9.Ba1 Nb4=) 8...Qe7 (better 8...0-0–/+) 9.Be2? (better 9.ab4 Ra1 10.Ba1 Nb4 11.c3=+) 9...ba3–+ 10.c4 (10.c3 Ra7 (10...ab2 11.Ra8 0-0 12.Qd2+-) 11.Bb5 0-0 (11...ab2?! 12.Ra7 0-0 13.Ra2=) 12.Bc6 bc6 (12...ab2?! 13.Ra7 bc6 14.Qc2=) 13.Na3 Ra3 (worse 13...Ba3 14.Qb3 Bc5 15.dc5 Ra1 16.Ba1–+) 14.Ba3 Ba3–+) 10...dc4 (10...Bb4 11.Bc3 a2 12.Bb4 ab1Q 13.Rb1 (13.Qb1?? Qb4 14.Kf1 Ra1 15.Qa1 dc4–+) 13...Nb4 14.Qb3–+) 11.Bc4 Bb4 (11...0-0 12.d5 Bb4 13.Bc3–+) 12.Bc3 Ne4 13.Bb4 Qb4 (13...Nb4?! 14.Ra3 Ra3 15.Na3=+) 14.Nbd2 Nd2 15.Nd2 0-0 16.0-0 Ra5 (16...Bf5!? 17.h3–+) 17.Bd3–/+ Qe7 (17...Ra7 18.Qc2 g6 19.Be4–/+) 18.Nc4=+ Ra7 19.Qh5? (better 19.Bb1!?=+) 19...g6–+ 20.Qh6 (20.Qe2 Be6–+) 20...b5 (20...a2!? 21.Rfc1–+) 21.Nd2 Nb4 Black prepares the advance a2 (21...b4!? 22.Rfb1–+) 22.Bb5–/+ Ra5 23.Bc4 a2 24.e4 Ba6 25.Ba6 (25.Qe3 Rb8–/+) 25...Ra6 26.Nf3?? (better 26.Rfc1–/+) 26...Nc2–+ 27.h4 (27.Ng5 f5 28.Rac1 fe4 29.Qh3–+) 27...Na1 28.Ra1 Rb8 29.Nd2 Qb4 (better 29...Qa3 30.e5 Qb2–+) 30.h5 (30.Nf3 Qc3 31.Ra2 Ra2 32.Qe3 Qe3 33.fe3–+) 30...Qd4 31.hg6 Qa1 32.Kh2 Rg6 33.Qf4 Rb1 34.Qc7 (34.g4 Rh1 35.Kg2 Qg1 36.Kf3 Rh3 37.Qg3 Rg3 38.Ke2 a1Q 39.fg3 Qad4 40.Nc4 Qgf2) 34…Rh1 0–1. Urbanaites,Elvira – Mamoshin,Valery, Kineshma Chess, 2010.

4.Be5 Nc6 5.ab4 Ra1 6.Ba1 Nb4 7.c3 Nc6 8.e3 Nf6 9.Nf3 Be7 10.Bb5 0-0 11.0-0 d5 12.d4 (12.Qa4 Nb8=) 12...Bf5 13.Nbd2 Na5 (13...Na7 14.Be2=) 14.Bb2 (14.Nh4 Bd7 15.Bd3 Ne4=) 14...c6=+ 15.Be2 1–0. Foster,Duncan (1655) – Duttagupta,Aniruddha (1825), FICGS, 2016.

4.Be5 Nc6 5.ab4 Ra1 6.Ba1 Nb4 7.Nf3 Nf6 8.e3 Be7 9.c3 Nc6 10.d4 d5 11.Bd3 0-0 12.Nbd2 Re8 (12...Qd6 13.0-0=) 13.0-0 Bd6 14.Bb2 Ne7 (better is 14...Ne4!?=) 15.c4+= c6 16.Qb3 Ng6 (16...Bf5 17.Bf5 Nf5 18.h3+=) 17.Ra1+/– Qc7 (17...b6 18.h3+/–) 18.c5 Bf8 19.Bc3 Ne4 20.Be4 de4 21.Ng5 Bf5 (21...Nh4 22.Ra7+- (22.Nde4?! h6 23.Nd6 Bd6 24.cd6 Qd7+=)) 22.Ra7 h6?? (better is 22...Re7 23.Nc4 h6+-) 23.Rb7 Qc8 (23...Qb7 24.Qb7 hg5 25.Qc6+-) 24.Qf7 Kh8 25.Rc7 Be6 (25...Qd8 26.Qf5 Qg5 27.Qg5 hg5 28.Rc6 Ne7+-) 26.Qg6 Qc7 27.Qh7# 1–0. psychobishop (1860) – yellowlab (1860), gameknot.com, 2012.

4.Be5 Nc6 5.ab4 Ne5? 6.Ra8 Bb4 7.e3 +-.

4.Be5= d6?? 5.ab4+/– Na6 6.Bc3 Bd7 (6...Be6 7.e4+=) 7.e4 c5 (7...Nf6 8.Ba6 Ra6 9.Ra6 ba6 10.Qf3+/–) 8.bc5 (8.b5 Nc7 9.Ra8 Qa8+/–) 8...Nc5 (8...dc5 9.Bc4+/–) 9.Ra8 Qa8 10.d3 Qa2 11.Nd2 (11.Nf3+/–) 11...Nf6? (11...Ba4 12.d4 Bc2 13.Bb5 Kd8 14.Qf3 Ne4 15.Ne4 Qb1 16.Kd2 Be4 17.Qf7 Qc2 18.Ke3 Qc3 19.Kf4–+) 12.Ngf3 (12.Bf6 gf6 13.d4 Ne6+-) 12...Bg4 13.Be2 Be7 14.0-0 0-0 15.Nd4 Be6+/– 16.f4 d5 17.e5 Nfd7 18.f5 Ne5? 19.fe6 Ne6 20.Ne6 d4 21.Nd4 Bc5 22.N2b3 Bb6 23.Qb1 Qa7 24.Qa1 Qb8 25.Ba5 Ba7 26.Kh1 Rc8 27.Nb5 Nc6 28.Bc3 h6 29.Bg7 Be3 30.Bh8 f6 31.Qf6 Qe5 32.Qg6 Kh8 33.Rf7. Leoni,Carlos – Cole,Adam Doeh, IECC, 1996.

5.Ba1 b5 6.Be5 Nc6 7.Bg3 Bb4 8.e3 Nf6 (8...Ba6!?=) 9.Bb5+- Ne7 10.c3 Ba5 11.Qa4 (11.Nf3 c6 12.Be2 d5+-) 11...c6 12.Bd3 0-0 (12...Bc7 13.Ne2+-) 13.Nf3 Bc7 14.c4 (14.Bh4 Ng6+-) 14...Bg3 15.hg3 h6 16.Nc3 d5 17.c5 Ne4? (better 17...Be6!?+-) 18.Ne4+- de4 19.Be4 (19.Qe4? Bf5 20.Qf5 Nf5 21.Bf5 Qd5–+) 19...Re8 (19...Be6 20.d4+- (20.Bc6 Nc6 21.Qc6 Qd3–/+)) 20.Ne5 Bd7 21.0-0 (21.Bc6 Nc6 22.Nd7 Qd7=+) 21...Nd5 (21...Qc8 22.d4+-) 22.f4 (22.d4 Nc3 23.Qc4 Ne4 24.Qf7 Kh8 25.Qd7 Qd7 26.Nd7 Re7+-) 22...Nf6 (22...Ne7 23.Qd4 (23.Nc6?! Nc6 24.Bc6 Bc6 25.Qc6 Re6+-) 23...Bf5 24.Bc6 Qd4 25.ed4+-) 23.Bf3 (23.Bc6?! Bc6 24.Qc6 Qd2+-) 23...Nd5?? (23...Qc7+-) 24.Bd5 (24.Nd7?! Qd7 25.Qd4 Qc8+-) 24...cd5 25.Nd7 1–0. Pierre – GuestPleve, internet, 2020.

5.Ba1 Nc6 6.b5 Nd4 7.e3 Ne6 8.Be5 Nf6 9.Nf3 d5 10.d4 Bd6 (10...Ne4 11.Bd3+/-) 11.Nbd2 0-0 12.Bd3 Re8 13.0-0 c6 14.bc6 bc6 15.c4 Qc7? (15...Be5 16.de5 Nc5 17.ef6 Nd3 18.fg7 Kg7+/-) 16.c5?? (better 16.Bf6 gf6 17.c5+-) 16...Be5+= 17.Ne5 Nd7?? (better 17...Nc5!? 18.Nb3 Nb3 19.Qb3 c5+=) 18.f4 (18.Bh7 Kf8 19.Nd7 Bd7+-) 18...f6? (better 18...Nf6+-) 19.Qh5 Nef8 (19...g6 20.Bg6! hg6 21.Qg6 Ng7 22.Qf7 Kh7+-) 20.Qe8 (20.Bh7 Nh7 21.Qf7 Kh8 22.Ng6) 20...fe5 (20...Ne5 21.fe5 Qd7 22.Qd7 Bd7 23.ef6 Be8+-) 21.fe5 Qa5 22.Nf3 (22.Qf7 Kh8 23.Qf8 Nf8 24.Rf8) 22...Qc3 23.Bh7! Kh7 24.Ng5 White prepares e6 (better 24.Qc8 Qe3 25.Kh1 Qd3+-) 24...Kh6 25.Nf7 (25.Qc8?! Qe3 26.Kh1 Kg5 27.Qd8 Kg6 28.Qe8 Kh7 29.Qh5 Kg8 30.Qf7 Kh8+/-; 25.Rf8?! Nf8 26.Nf3 Qc1 27.Kf2 Qc2 28.Kg3 Qg6 29.Qg6 Kg6+=) 25...Kh7 26.Qc8 Qe3 27.Kh1 Qd4 (27...Qd3 28.Rg1 Qd4 29.e6 Ne6 30.Qd7+-) 28.e6 Ne6 (28...Qc4 29.Re1 Qc3 30.Ng5 Kh6 31.Nf3 Ne6 32.Qd7+-) 29.Qh8 Kg6 30.Qh3 Qe4 31.Nh8 (better 31.Nd6 Ng5 32.Qd7+- (32.Ne4?! Nh3 33.Ng3 Ng5+-)) 31...Kg5 32.Qg3 Kh5 33.Re1 Qf4 (33...Qf5 34.h3 Ng5+-) 34.Qh3 (34.Qg6 Kh4 35.g3 Qg3 36.Qg3 Kh5 37.Rg1 Ndc5 38.Qh3) 34...Kg5+- 35.Qe6 Nf6 36.Nf7 (36.Re5 Qe5 37.Qe5 Kh6 38.Qf5 Ne4 39.Nf7) 36...Kg6+- 37.Ne5 Kh7 38.Qh3 Kg8 39.Ng6 Qf2 40.Qe6 (40.Qh8 Kf7 41.Ne5 Ke7 42.Nc6 Kf7 43.Re7 Kg6 44.Qg7 Kh5 45.Re5 Qf5 46.Rf5 Kh4 47.Qg5) 40...Kh7+- 41.Ne7 Qh4 42.Qe2 (better 42.Qf5 Kh8 43.Rb1 Nd7 44.Ng6 Kg8 45.Nh4 d4 46.Qd7 Kh7 47.Qf5 g6 48.Qg6 Kh8 49.Rb8) 42...Ng4 (42...Ne4 43.Nf5 Qg5 44.Nd6+-) 43.g3 (43.Qc2 Kh8 44.Ng6 Kg8 45.Re8 Kf7 46.Rf8 Ke6 47.Qf5) 43...Qh3 (43...Qg5+-) 44.Qc2 g6 (44...Kh8 45.Ng6 Kg8 46.Re8 Kf7 47.Rf8 Ke6 48.Qf5) 45.Qg6 Kh8 46.Qg8 1-0. black_bishop_88 (2470) - filmer75 (2505), lichess.org, 2020.

5.Ba1 d5 6.Be5 Qe7 (6...Nc6!? 7.Bf4 Bb4+=) 7.Bc3 Nc6 8.e3 (8.b5!? Nb4 9.Nf3+=) 8...Nb4= 9.Nf3 Nc6 10.Bb5 Bd7 11.0-0 Nf6 12.Qe2 Ne4 13.Bc6 Bc6 14.d3 Nc3 15.Nc3 Qf6 (better is 15...Qc5 16.e4 d4=) 16.Ra1?? (better is 16.e4 de4 17.Ne4+/–) 16...Qc3–+ 17.Ra8 Kd7 18.Ng5 (18.Nd4–+) 18...g6?? (better is 18...Bd6 19.Ra7 Ke7–+) 19.Nf7–/+ Rg8 20.Nh6 Bh6 21.Rg8 Qa1 22.Qf1 Qb2 23.h3 Qc2 24.d4 (24.Rh8!? Bg5 25.Rh7 Be7 26.d4+=) 24...Qf5–/+ 25.Rh8 g5 26.Qa1 g4 (better is 26...Bg7!? 27.Rg8 Bf8–/+) 27.hg4 Qg4?? (27...Qg6 28.Qa8 Kd6 29.Rd8 Bd7 30.Qb7 Qg4 31.Qa6 c6 32.Qa3 Ke6 33.Qa7=) 28.Qa8?? (better is 28.Rh7 Bg7 29.Qa8+-) 28...Qd1–/+ 29.Kh2 Qh5 30.Kg1 Qd1 31.Kh2 Qh5 32.Kg1 Qd1 ½–½. Fournier,Frederic (1990) – SamiSalami (2040), Echecs21 (2/0), 2003.

5.Ba1 Bd6 6.c3 (6.Nf3 f6 7.Bc3 Be7=) 6...Nf6=+ 7.c4 b6 8.Nf3 Nc6 (8...e4 9.Ng5 Bb4 10.Bf6 Qf6 (10...gf6?! 11.Ne4 Bb7 12.Qc2=) 11.Ne4 Qe6-/+) 9.b5= Nb8 (better 9...e4!?=) 10.Ne5+= 0-0 11.e3 c6 12.Ng4 cb5?? (better 12...Be7+/-) 13.Nf6+- gf6 (13...Kh8 14.Qh5 h6 15.Qf5+-) 14.Qg4 Kh8 15.Qf5 Be5 16.Bd3 (16.Bd3 Ba1 17.Qh7) 1-0. FeegLood (2225) - malcolm777b (1630), lichess.org, 2015.

5.Ba1 e4 6.c4 Bb4?? 7.Bg7 e3 8.Nf3 ef2 9.Kf2 +-.

5.Ba1 e4 6.c4 e3 7.Nf3 (7.Qb3 ef2 8.Kf2 Nh6=) 7...ef2 (7...Bb4?? 8.Bg7 ef2 9.Kf2+-) 8.Kf2 Nf6 (8...Bb4?? 9.Bg7 Nf6 10.Bh8 Ne4 11.Ke1+-) 9.Qa4 (9.Qb3 Qe7=) 9...Nc6=+ 10.b5 Ne4 11.Ke1 Nc5 12.Qd1 (12.Qa8 Nb4=+) 12...Nb4 13.d4 Ne4 14.Qa4 (14.Qb3 b6=+) 14...Qf6 (14...Qe7 15.Qb3 b6 16.e3=+) 15.Nbd2 Qf4 (15...Qe7 16.Ne4 Qe4 17.Kd2=) 16.Ne4= Qe4 17.Kd2 Qb1 (17...Be7 18.Bc3 Qb1 19.g3=+) 18.g4 (18.g3!? g6 19.g4=) 18...Bd6=+ 19.e3 0-0 20.Rg1 Re8 21.c5 Qe4 22.Qb3 Bf4 23.Ne5 Be3 24.Qe3 Qc2 25.Ke1 d6 26.cd6 cd6 27.Be2 de5 28.de5 Rd8 29.Kf1 Be6 30.Bc3 Nd5 31.Qg5 Rc8 32.Ba5 Qe4 33.Qd2 Nf4 34.Kf2 Nh3 35.Kf1 Bd5 36.Bb6 Ng1 37.Bd1 Nf3 38.Bf3 Qf3 39.Ke1 Rc3 (40.Qd1 Qe4 41.Kf1 Qh1 42.Ke2 Bc4 43.Qd3 Bd3 44.Ke3 Qe4 45.Kf2 Rc2 46.Kg3 Rg2 47.Kh4 Qg4) 0–1. Luzuriaga,Norberto Horacio (2350) – Lundgren,Per, corr ICCF W–Cup12 Gr081, 2000.

5.Ba1 e4 6.c4 Nf6 7.b5 b6 (7...Bc5 8.d4 Be7 9.Nc3=+) 8.Qa4= Bb7 9.Bf6 gf6 (< 9...Qf6 10.Qa7 Nc6 11.bc6 Bc6 12.Nc3+/– (12.Qc7?! Qb2 13.Qb8 Ke7=)) 10.f3 Rg8 11.fe4 (11.Qa7 Qc8=) 11...Be4 12.Nc3 Bg2 (12...f5 13.Nf3=) 13.Bg2 Rg2 14.c5 Be7 (14...f5 15.cb6 cb6 16.Qf4=) 15.cb6+= c6 (15...cb6 16.Qh4+=) 16.Qd4+/– cb5 (16...Qc8 17.Qe4 Rg7 18.bc6 dc6 19.Qf4+/–) 17.Nb5 Nc6 18.Nc7 Kf8 19.Qe4 (19.Qd5 Rg5 20.Qd3 Ra5 21.Qh7 Bc5=) 19...Rg6 20.Nf3 Bc5 21.Qb1 Qb8 22.Nd5 Qd6 23.Qa2 Rg2 24.Rf1 Qe6 25.Qc4 Kg7 26.Nh4 Rh2 27.Nf5+- Kh8 28.Qg4 Bf8 29.Rg1 Re2 30.Kd1 Rd2 31.Kc1 Ba3 32.Kd2 Qd5 33.Ke1 Bb4 34.Kf1 Qd3 35.Kg2 Bf8 36.Kh1 Qd5 37.Rg2 Qg2 38.Kg2 Na5 39.Ng3 Bc5 40.Nh5 Bf8 41.Qd7 Be7 42.Qe8 Bf8 43.Qf8 1–0. COMP – COMP, 2001.

5.Ba1 e4 6.e3 Nf6 (6...Bb4?? 7.Bg7 Nf6 8.Bh8+-) 7.g4 (7.Bf6 Qf6 8.Nc3 Bb4 9.Ne4 Qe7=+) 7...d5 8.g5 Nfd7 9.h4 h6 10.Nh3 Nc6 11.b5 Nce5 12.Be2 hg5 13.hg5 Ng6 14.Kf1? (better 14.f4 ef3! 15.Bf3-+) 14...Nde5-+ 15.Kg2 (15.Bh5 Nf3! 16.Bf3 Bh3 17.Rh3 Rh3 18.Bg2-+) 15...Nf3! 16.Nc3 (16.Bf3 Nh4 Deflection (16...Nh4 Decoy)) 16...Rh3 17.Rh3 Bh3 18.Kh3 (18.Kh1 Bg2! 19.Kg2 Qg5 20.Kh1 Qh4 21.Kg2 Qh2 22.Kf1 Qg1) 18...Qd7 19.Kg3 Bd6 20.Kg2 Ngh4 21.Kf1 (21.Kh1 Qh3) 21…Qh3 0-1. FeegLood (2565) - Baby1 (2390), lichess.org, 2015.

5.Ba1 f6 6.Bc3 =+.

5.Ba1 Nf6 6.Be5= Bb4 7.e3 Nc6 8.Bc3 d5 9.Bb4 (9.Bb5 Bd6=+) 9...Nb4=+ 10.Bb5 (10.c3 Na6=) 10...c6 (10...Bd7 11.Bd7 Qd7 12.Nf3=+) 11.c3 Qa5 (11...Na6 12.Be2=) 12.Be2= Na6 13.Nf3 0-0 14.0-0 Bg4 15.d4 (15.Ne5 Be2 16.Qe2 Qa2=) 15...Nc7 (15...Ra8 16.Ne5 Be2 17.Qe2=) 16.Ne5 Be2 17.Qe2 Ra8 (17...Ne4 18.c4=) 18.c4 c5 (18...dc4 19.Qc4 Ncd5 20.Qd3=) 19.cd5 (19.Rc1 cd4 20.ed4 dc4 21.Qc4 Ne6=) 19...Ncd5 20.Qb2 (20.e4 Nc7 21.d5 Qb4=+). Sandeman_be – Neinsah, ChessWorld.net, 2005.

6.c3 Ba5 7.e3 Nf6 8.Nf3 Qe7 (8...e4 9.Ne5 0-0 10.Nc4 c5–/+) 9.Be2 (9.d4 e4 10.Nfd2 c6–/+) 9...c6 (9...0-0 A) 10.Qa4 Nc6–/+ (10...Bb6 11.d4–/+); B) 10.0-0 Nc6–/+) 10.0-0 (10.c4 d6–/+) 10...d5 11.d3 Nbd7 12.Re1 (12.c4 0-0–/+) 12...0-0 13.Nbd2 Bc7 14.c4 e4 15.Ng5 (15.Nd4 Nc5 16.de4 de4–/+) 15...h6–+ 16.Nh3 Nc5 (16...ed3 17.Bd3 Nc5 18.Nf4–+) 17.Nf4–/+ Bf4 (17...Bf5 18.d4 Ne6 19.Ne6 Qe6 20.c5–/+) 18.ef4 e3 19.Nf1 (19.Bf1 ef2 20.Kf2 Ng4 21.Kg1 Qh4–/+) 19...ef2 20.Kf2 Re8 21.Bd4? (21.Kg1 Ne6 22.Bf3 Qc5 23.Kh1 d4–/+) 21...Bg4! 22.Ng3 h5 23.h3 Be2 24.Re2=+ Qd6 25.Re8 Ne8–/+ 26.Be5 Qe6 27.Nh5 f6 28.Bd4= b6 29.Bc5 bc5 30.Qe2 Kf7 31.g4 g6 32.Qe6 Ke6 33.Ke3?? gh5–+ 34.g5 fg5 35.fg5 Kf5 36.d4 cd4 37.Kd4 dc4 38.Kc4 Kg5 (39.Kc5 Kh4–+) 0–1. FelixFri – babyl, ChessWorld.net, 2008.

6.c3 Ba5 7.e4 Nf6 8.Nf3 0-0 9.Ne5 Qe7 10.Nf3 Qe4 –+.

6.c3 Ba5 7.Nf3 d6 (7...Nc6–/+ 8.e4 Nf6 9.Qa4 Bb6 10.Bb5 0-0–/+) 8.e4 Nf6 9.Bc4 Ne4 10.Qa4 c6 –/+.

6.c3 Be7 A) 7.e4–/+ Nf6 (7...d5 8.Nf3 de4 9.Ne5 Nd7 10.Nd7 Qd7–/+) 8.d4 Ne4 9.f3 Ng5 10.de5 Ne6–+; B) 7.Qa4 c6 (7...Na6 8.Nf3 Nc5 9.Qa7 e4 10.c4 f6–/+) 8.c4 d6 9.d4 Qb6 10.Nd2 ed4–/+.

6.Be5 Bf8 7.Nf3 d6 8.Bg3 Nf6 9.e3 Nc6 10.c4 Bg4 11.Nc3 Be7 12.Be2 Ne5 (12...0-0 13.d4=) 13.0-0 (13.Ne5 Be2 14.Qa4 Kf8 15.Ne2 de5 16.Be5 Nd7+-) 13...Bf3 14.Bf3 Nf3 15.Qf3 0-0 (15...c6!?+/-) 16.Qb7+- Qd7 17.Ra1 c6 (17...Re8 18.Bh4+-) 18.Qd7 Nd7 19.Ra7 Rd8 20.Ne4 (20.Rc7 c5+-) 20...d5 21.Nc5?? (better 21.Bc7 Re8 22.Nd6 Bd6 23.Bd6+-) 21...Bc5-+ 22.cd5 (22.Ra6 dc4 23.Kf1-+) 22…Ba7 0-1. alddhsfd (2015) - NasserAli777 (1985), lichess.org, 2021.

7.c3 Ba5 8.Qa4 Nc6 9.Bg3 0-0 (9...d6 10.e3=+) 10.e3 d6 11.Bb5 (11.Nf3 Bf5 12.Bb5 Bb1=+) 11...Bb6 (11...Qd7=+) 12.Bc6 (12.Ne2!?=+) 12...bc6–/+ 13.Qc6? (13.Na3 Be6 14.d3 Qb8–/+) 13...Ba6 (13...Bf5 14.d3 Bd3 15.Nd2–+) 14.Ne2? (better is 14.d4–/+) 14...Bd3–+ 15.Na3 (15.Nf4 Bb1 16.Qb5 Bc2–+) 15...Be4 (better is 15...Qa8 16.Qa8 Ra8 17.f3–+) 16.0-0?? Bc6 0–1. Enrique (2160) – CrAzYcArPeT (2160), Live Game Caissa's Web, 2006.

7.c3 Ba5 8.e3 Nc6 9.Bf6 Qf6=+ (< 9...gf6 10.d4+/–).

7.c3 Ba5 8.Nf3 0-0 9.e3 Nc6 10.Bg3 Ne4 11.Be2 d5 12.Na3 Re8 13.Nc2 Bb6 14.0-0 Ng3 15.hg3 Ne5 16.Ne5 Re5 17.Nd4 c5 18.Nf3 Re8 19.d4 Bg4 (19...c4 20.Qb1=+) 20.Qb3 c4 21.Qb5 Re7 (21...Ba5 22.Rc1=+) 22.Rb1 (22.Ra1 h6=) 22...Ba5=+ 23.Qb2 g6 24.Kf1 (24.Qa3 Be6=) 24...Bc7 25.Qb7 Bg3 26.Qb6 Bc7 27.Qc5 Kg7 28.Ng1 Be6 29.Bf3 Bd6 (29...Rd7 30.Ne2=+) 30.Qb6= Rd7 31.Ne2 h5 32.Qd8 Rd8 33.e4 de4 34.Be4 Re8 35.f3 h4 36.Bc6 Rc8 37.d5 Bf5 38.Rb7 Bd3 39.Kf2 Ra8 (39...Kf6!?=+) 40.Rf7= Kf7 41.Ba8 Kf6 42.Ke3 Bc5 43.Nd4 (43.Kd2 g5=) 43...Ke5 (43...Bf1 44.Kf2 Bg2 45.Kg2 Bd4 46.Bc6 Bc3 47.Bb5-/+) 44.f4 (44.d6!? Bf5 45.d7 Bd7 46.f4 Kd6 47.Be4=) 44...Kd6=+ 45.Bc6 Bf1 46.Kf2 Bd4 47.cd4? (better 47.Kf1 Bc3 48.Ke2=+) 47...c3-+ 48.Ba4 Bd3 49.Ke3 Bf5 (better 49...c2!? 50.Kd2 Kd5 51.Bc2 Bc2 52.Kc2 Kd4-+) 50.Bb3-/+ Bb1 51.Ke2 (better 51.Ba4-+) 51...Be4 52.Kf2 c2 (52...Bd5?! 53.Bc2=) 53.Bc2 Bc2 54.g3 hg3 55.Kg3 Kd5 0-1. black_bishop_88 (2600) - SuperConfinado (2565), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

7.c3 Ba5 8.Nf3 Nc6 9.Bg3 0-0 10.e3 d5 11.Be2 Ne4 12.0-0 Ng3 13.hg3 (13.fg3 Qd6=) 13...Re8 14.Na3 h6 15.Nb5 Ne7 16.Qb1 c6 17.Na7 Bd7 (better 17...b5!? 18.Nc8 Qc8=) 18.Qb7+= Qc7 19.Rb1 Bf5 (19...Qd6!?+=) 20.Qc7+/- Bc7 21.Rb7 Bd6 22.Nd4 Be6 23.Ne6 fe6 24.Bg4 Kf7 (24...e5 25.Be6 Kh8 26.Bd7+-) 25.Nc6 Kf6 26.Ne7 (26.Nd4 Ng6+-) 26...Re7 27.Rb6 Bc7 28.Rc6 Kf7 1-0. black_bishop_88 (2655) - badbadger95 (2530), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

7.c3 Bc5 8.d4 Be7=.

7.c3 Bc5 8.e3 Nc6 9.Bg3 (9.d4 Ne5 10.de5 Ng8=) 9...Ne4 10.d4 Ng3 11.hg3 Be7 12.Qd3 d5 (12...h6!?=) 13.Rh7+= Rg8 14.Nf3 Bg4 15.Ne5 (better 15.Qc2!?+/-) 15...Ne5= 16.de5 Qd7 17.c4?? (17.Rh2 Bf5 18.Qd1 c6=) 17...c6 (better 17...Bf5 18.Qb3 Bh7 19.cd5 Bb1 20.Qb7 c6 21.Qb1 Qd5-+) 18.cd5?? (18.Qb3 Bd8 19.Nd2=) 18...cd5?? (18...Bf5 19.dc6 bc6 (19...Bd3?? 20.cd7 Kd7 21.Bd3+-) 20.Qd7 Kd7-+) 19.Qb3+/- Qf5 (19...Qc7 20.Nc3+/-) 20.Bb5 Kd8 (better 20...Kf8 21.Bd3 Qe5 22.Qb7 f5+/-) 21.Nd2 (better 21.Qd5 Kc8 22.Bd3 Bb4 23.Kf1+-) 21...Qh7 22.Qd5 Kc7 (22...Kc8 23.Qc4 Kb8 24.Qg4=) 23.Qc4 (better 23.Qf7!? Rc8 24.Qc4 Kb8 25.Qg4 Rc1 26.Ke2+=) 23...Kb8 24.Qg4 Qh1 (24...Qc2 25.Qc4 Rc8 26.Qc2 Rc2 27.Bd3=) 25.Ke2 Bb4?? (25...Qc1 26.Bd3+=) 26.Qd4 (better 26.Qb4 Qh5 27.Nf3+-) 26...Ba5 (26...Bd2 27.Kd2 Qg2 28.Ke2=) 27.Nc4 Rd8 28.Nd6 Qe1 (28...Bc7 29.Qb4 Qh5 30.f3 Bd6 31.ed6=) 29.Kf3+/- Qd1?? (29...Bc7 30.g4+=) 30.Kf4 (better 30.Qd1 Bc7 31.Qd5 Bd6 32.ed6+-) 30...Qd4 31.ed4 Bc3 (31...Bb4 32.Nf7 Rd4 33.Kf5+=) 32.Ke4+/- Be1? (better 32...f6+/-) 33.Nf7+- Bf2 (33...Rc8+-) 34.e6 (better 34.Nd8 Bg3 35.d5 g6+-) 34...Rf8 (34...Rg8 35.g4+-) 35.d5 (better 35.e7!? Rg8+-) 35...Rf7 (35...Bc5 36.Ke5 Rf7 37.ef7+-) 36.ef7 Kc7 (36...Bc5+-) 37.f8Q Kb6 38.d6 Kb5 39.d7 (39.Qf2 g5 40.d7 b6 41.d8Q Ka4 42.Qfb6 g4 43.Qa8) 39...Kc6 40.d8Q Kb5 41.Qg7 (41.Qd7 Ka5 42.Qa3 Kb6 43.Qdd6 Kb5 44.Qab4) 41...b6 (41...Ba7 42.Qb7 Kc4 43.Qdd5 Kc3 44.Qbb3) 42.Qgg5 (42.Qb2 Kc6 43.Qc8 Kd6 44.Qe5) 42...Bc5 (42...Ka4 43.Qd1 Kb4 44.Qb1 Ka3 45.Qe7 Bc5 46.Qa7) 43.Qb6! Kb6 44.Qc5! Kc5 45.g4 Kb5 46.g5 Kc4 47.Kf5 Kb3 48.g6 Kc2 49.g7 Kb1 50.g8Q Kc1 51.Qe8 Kc2 52.g4 Kd3 53.g5 Kd2 54.g6 Kc2 55.g7 Kd2 (55...Kd3 56.Qd7 Kc4 57.g8Q Kc3 58.Qgc8 Kb4 59.Qdb7 Ka4 60.Qca8) 56.g8Q Kc2 (56...Kc3 57.Qe5 Kc2 58.Qa2 Kd3 59.Qae2) 57.Qg7 (57.Qg7 Kb3 58.Qb5 Kc2 59.Qgb2 Kd1 60.Q5e2; 57.Qe2 Kc3 58.Qgc4) 1-0. danishguy (2075) - Vitaliy_87 (2150), Rated Bullet game, lichess.org, 2020.

7.c3 Bc5 8.Bg3 0-0 9.d4 Bb6 10.f3 (10.e3!?=) 10...d5-/+ 11.e3 c5?? (11...Re8 12.Qd2-/+) 12.Bd3?? (better 12.Bb8 Re8 13.Be5+-) 12...Re8 (12...Nc6 13.Ne2=+) 13.Kf2 (13.Bb8 cd4 14.Ne2 dc3 15.Bf4+= (worse 15.Nec3 Bh3 16.gh3 Re3 17.Ne2 Qb8=)) 13...Nc6 14.Ne2 Bg4 (14...Nh5 15.dc5 Bc5 16.Nd4-/+) 15.Re1 (15.dc5 Bc5 16.Nd4 Bd7=+) 15...Bh5 16.h3 Bg6 17.Nf4 h6 (better 17...Bd3!? 18.Qd3 c4=+) 18.Ng6+= fg6 19.Bg6 Re7 20.Qc2 Qa8 21.Nd2 Qa7 (21...Qd8 22.Kg1+/-) 22.Kf1 (22.Qf5 cd4 23.cd4 Qa5+-) 22...cd4 23.ed4 Re1 24.Be1 Qa6 (24...Bc7 25.Bh4 Qa6 26.Kg1+/-) 25.Bd3 Qa8 26.Bf2 (26.Qb3 Qd8+-) 26...Qe8 (26...Bc7 27.Qb3+/-) 27.f4 (27.Qb3 Qd8+-) 27...Nd8 (27...Qb8 28.g3+/-) 28.g3 (28.Qb3 Qc6+-) 28...Nf7 29.Nf3 Nd6 30.Ne5 Nfe4 31.Kg2 Qe6 (31...Qa8 32.Nc4! Nc4 33.Bc4+-) 32.Be3 (32.Qb3 Ba5 33.f5 Qf5 34.Qd5 Kh8+-) 32...Bc7 (32...Nf5 33.Bg1 Neg3 34.Bf2+/-) 33.g4 (33.c4 Nf6+-) 33...g5 (33...b5 34.f5 Qe8 35.Bf4+/-) 34.f5 Nf5?? (better 34...Qe7+-) 35.Be4 (better 35.gf5 Qf5 36.Qb3 Be5 37.Qd5 (37.de5?! Qe5 38.Be4 Qe4 39.Kf2 Qf5 40.Ke1 Qe4+-) 37...Qf7 38.Be4+-) 35...Ne3-+ 36.Kf3 Nc2 (36...de4?! 37.Ke3 Be5 38.de5 Qe5 39.Qb3 Kh8 40.Qb7 Qf4 41.Kd4 Qf2 42.Kc4 Qa2 43.Kc5=) 37.Bc2 Be5 38.de5 Qe5 39.Bf5 Qf4 (39...Qc3 40.Kg2-+) 40.Kg2 (40.Ke2 h5!-+) 40...Kg7 41.h4 Kf6 (better 41...gh4 42.Be6-+) 42.hg5 hg5 43.c4 d4 (better 43...dc4 44.Kg1-+) 44.c5 b6! 45.c6 (45.cb6 d3 Passed pawn) 45...Qc7 (45...b5 46.c7 Qc7 47.Be4-+) 46.Kf3 (46.Be4 b5 47.Bd5 d3-+) 46...Ke5 47.Be4 b5 48.Bd3 b4 (48...Qc6 49.Ke2 Qg2 50.Ke1 Kf4 51.Bf1 Qb2 52.Bd3 Ke3 53.Bc2 Qc2 54.Kf1 Qf2) 49.Be4 b3 50.Ke2 (50.Bd3 Qc6 51.Ke2 Qg2 52.Ke1 Qg3 53.Kf1 Qd3 54.Kf2 b2 55.Kg2 Qd2 56.Kh3 b1Q 57.Kg3 Qbd3) 50...b2 (50...Ke4 51.Kf2 Qh2 52.Ke1 Ke3 53.Kd1 Qd2) 51.Bd3 Qc6 52.Bb1 Kf4 53.Bd3 (53.Bh7 Qg2 54.Kd3 b1Q 55.Kc4 Qba2 56.Kd4 Qgd5 57.Kc3 Qad2) 53...Qe4! 54.Kd2 (54.Be4 Ke4 Combination) 54...Qd3! 55.Kd3 b1Q (55...b1Q 56.Kd4 Qg1 57.Kc3 Qg4 58.Kd3 Qf5 59.Kc4 g4 60.Kb4 g3 61.Ka3 g2 62.Kb4 g1Q 63.Kc3 Qe3 64.Kb4 Qfc5 65.Ka4 Qea3) 0-1. TwelveTeen (2700) - toivok (2760), lichess.org, 2018. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

7.c3 Bd6 8.Bd6+/- cd6 9.Nf3 Qb6 10.e4 (better 10.e3+/-) 10...Ne4=+ 11.Qe2?? (better 11.Nd4!?=+) 11...d5 (better 11...Qb1 12.Qd1 Qd1 13.Kd1 Nf2 14.Ke2 Nh1 15.g3-+) 12.d3?? (better 12.Qb5 Qf2 13.Kd1-+) 12...Qb1 13.Qd1 Qd1 14.Kd1 Nc3 (better 14...Nf2 15.Ke1 Nh1-+) 15.Kc2 Nb5 16.d4 Nd6 17.Ne5 (17.Bd3 Nc6-+) 17...0-0 18.f3 (18.f4 Ne4-+) 18...Nc6 19.Nc6 dc6 20.Bd3 Bf5 21.Re1 (21.Ra1 Nb5 22.Ra4 Bd3 23.Kd3 b6-+) 21...Bd3 (21...Nb5 22.Re7 Rb8 23.Re5 Nd4 24.Kc3 Bd3 25.Kd4-+) 22.Kd3 Nc4 (22...Ra8 23.Re7-+) 23.g4 f6 (23...f5 24.Re7-+) 24.f4 (24.Re7 b6-+) 24...Kf7 25.h4 White prepares g5 (25.Rb1 b6-+) 25...Re8 26.Rb1 (26.Re8 Ke8 27.g5 fg5 28.hg5 h6-+) 26...Re7 (26...b6 27.Ra1 Re3 28.Kc2-+) 27.g5 (27.h5 Re3 28.Kc2 Nd6-+) 27...fg5 (27...Kg6 28.gf6 gf6 29.Rg1 Kh5 30.Rg8-+) 28.fg5 (28.hg5 b5-+) 28...Kg6 29.Rf1 h6 30.gh6 gh6 31.Rg1 Kh5 32.Rg7 (32.Rf1-+) 32…Rg7 (32...Rg7 33.Ke2 Re7 34.Kf2 Kh4 35.Kg2 Nd2 36.Kf2 h5 37.Kg2 Re2 38.Kh1 Kg3 39.Kg1 Re1) 0-1. danishguy (2040) - Otecalexander (2040), Rated Bullet game, lichess.org, 2020.

7.Nc3 Nc6 8.Bf6 Qf6 9.Nd5= Qf5 10.c4 Ba5 11.Nf3 0-0 12.e3=.

7.Nc3 d6 8.Bd4 (8.Bf6!? gf6 9.Nd5+/– Bc5 10.Qa1 Nd7 11.d4 Bb6 12.Qc3+/–) 8...0-0 (8...Nbd7 9.Nf3=+ (9.Qb1 c5 10.Bf6 Nf6 11.Na2 Ba5 12.Qb5=+) 9...0-0 10.e3 c5 11.Bf6 Nf6 12.Nb5=+; 8...Nc6 9.Bf6 Qf6 10.Nd5 Qf5 11.c4 Ba5 12.e3=+) 9.Na2 (9.Bf6!? Qf6 10.Nd5= Qb2 11.Nf3 Nc6 12.e3=+) 9...Ba5 10.e3 (10.e3 Be6 11.Qa1=+ (11.Bc3 c6 12.Ba5–/+) 11...Nbd7 12.Nf3=+; 10.Qa1 Nbd7 11.e3 c5 12.Bc3=+) 10...Nc6 11.Bc3 Be6 12.Ba5 =+. tata (2000) – yannigator (2080), net–chess.com, 2008.

7.e3 0-0 8.c3 Be7 9.d4 d6 (9...d5 10.Bf6 Bf6 11.Bd3=) 10.Bg3 (10.Bf6 Bf6 11.Bd3 Nc6=) 10...Be6 (10...Nc6 11.Bd3=) 11.Bd3 c5 12.Ne2 c4 13.Bc2 d5 14.Nf4 (14.Nd2 b6=) 14...b5 (14...Nc6 15.e4=) 15.Bh4 Bg4 16.f3 Be6 (16...Bc8 17.0-0=) 17.e4 (17.0-0 Qd6=) 17...de4 (17...b4 18.e5 Nfd7 19.Be7 Qe7 20.cb4=) 18.Bf6= ef3?? (better is 18...Bf6 19.Ne6 fe6 20.Be4 b4 21.cb4 Qd6=) 19.Ne6+- fg2 20.Rg1 fe6 21.Be7 Qe7 22.Qh5 g6 23.Rg2+- Qf6 24.Nd2 Kg7 25.Qe5 Kh6?? 26.Rg3 (26...Qe5 27.de5+-; better is 26.Qb5 Qf4 27.Qc4+-) 1–0. Kerner – Hermann, corr (year?).

7.e3 0-0 8.Bc3 Be7 9.Nf3 d5 10.d4 Ne4 11.Bd3 c5 (11...Qd6 12.0-0=+) 12.Be4 (12.dc5 Bc5 13.0-0 Nc6=) 12...de4=+ 13.Ne5 (13.Nfd2 Qd5=+) 13...cd4 (13...b5 14.h3-/+) 14.Bd4 Qa5 15.c3 Nc6 16.Nc6 bc6 17.0-0 (17.Nd2 c5 18.Be5 Rd8-/+) 17...c5 (better 17...Qg5!? 18.f3 ef3 19.Qf3 c5-+) 18.Be5 Be6 19.f4? (19.Nd2!? f6 20.Bf4=+) 19...Rd8 (19...f6!? 20.f5 Bc4 21.Bf4-+) 20.Qe2-/+ f6 21.f5 Bf7 (21...fe5?! 22.fe6 Qb6 23.Qc4=+) 22.Bf4 Bd6 (22...Qa4 23.Qf2-/+) 23.Qg4 Bf4 24.Qf4 (24.Rf4? Bc4 25.Re4 Qa2-+) 24...Qb5 (24...Bc4!? 25.Re1 Bd3-/+) 25.Qe4= Bc4?? (better 25...Re8 26.Qf3 Ba2=+) 26.Rf4 (better 26.Na3 Bf1 27.Qe6 Kf8 28.Nb5 Bb5 29.Qb6 Rd1 30.Kf2+-) 26...Bd3 (better 26...Rd1 27.Kf2 Bd5-+) 27.Qe5?? (better 27.Na3 Qd7 28.Qa4=+) 27...Qb1-+ 28.Kf2 Qc2 (28...fe5 29.Rf3 Bf5 30.h3 Rd2 31.Kg3 Be4 32.Rf8 Kf8 33.Kh4 Qe1 34.g3 Rg2 35.Kg4 Qg3 36.Kh5 Qh3) 29.Kg3 Rf8 (better 29...fe5 30.Rf2 Qc3-+) 30.Qe6 (30.Qc5 Re8-+) 30...Kh8 31.Qe7 Rg8 (better 31...Rc8 32.Qe6 Rg8-+) 32.Rg4? (32.Qc5 Re8 33.h3-+) 32...Qc3 33.h4 (33.Rf4 Qe1 34.Kh3 c4-+) 33...Qe5 (better 33...Bf5!? 34.Ra4-+) 34.Qe5 fe5 35.e4 (35.Ra4-+) 35...c4 36.Kf3 (36.h5 c3 37.Rh4-+) 36...c3 37.Ke3 c2 (37...Rd8 38.f6 c2 39.fg7 Kg8 40.Kd2 Be4 41.Kc1 Rd1 42.Kb2 c1Q 43.Kb3 Qc2 44.Kb4 Rb1 45.Ka5 Qa2) 38.Kd2 Rc8 39.Kc1 (39.Ke3 c1Q 40.Kf2 Rc2 41.Kg3 Qh1 42.h5 Rg2 43.Kf3 Be2 44.Ke3 Qc1) 39...h5 (39...Rb8 40.Kd2 Rb1 41.Ke3 c1Q 42.Kf3 Be2 43.Kg3 Qe3 44.Kh2 Qg1 45.Kh3 Rb3 46.g3 Qh1) 40.Rg3-+ Be4 41.Re3 Bf5 (41...Rc4!? 42.g3-+) 42.Re5 Bg6 43.Rg5 (43.Re1 Rc4 44.g3 Rc3-+) 43...Kh7 44.g4 hg4 45.Rg4 Rc5 (45...Ra8 46.Rg6 Kg6 47.Kc2-+) 46.Rg2 Rh5 47.Rd2 Rh4 48.Kb2 (48.Rc2 Rh1 49.Kb2 Bc2 50.Kc2 g5-+) 48...Rh1 (better 48...Rb4 49.Kc3 c1Q 50.Kb4 Qd2 51.Kc5 Qe3 52.Kd5 Be4 53.Kc4 g5 54.Kb4 g4 55.Kc4 g3 56.Kb5 g2 57.Kb4 Qb6 58.Ka3 Bc2 59.Ka2 Qb3 60.Ka1 g1Q) 49.Kc3 (49.Rc2 Bc2 50.Kc2-+) 49...c1Q 50.Kd4 (50.Rc2 Qc2 51.Kd4 Qd3 52.Kc5 Qc3 53.Kd5 Rd1 54.Ke6 Qe3) 50...Qc2! 51.Ke5 (51.Rc2 Rd1 Double attack (51...Rd1 Decoy)) 51...Qd2 52.Ke6 Qd7! (52...Qd7 53.Kd7 Bf5 54.Kd6 Re1-+) 0-1. danishguy (2105) - Kratochwil (2140), Rated Bullet game, lichess.org, 2020.

7.e3 0-0 8.Nf3 Re8 9.Be2 Nc6 10.Bb2 d5 11.0-0 Bg4 12.c4 dc4 13.Bc4 Ne4 14.Qb3 Nd6 (14...Qe7 15.Ne5 Ne5 16.Be5=) 15.Bd5+= Bc5?? (better 15...Be6+=) 16.Qc3+- Nf5? (16...Qf6 17.Qc1 Qf5 18.Qc5 Ne4+-) 17.Qc5 Qd6 (17...Qe7 18.Qc3 Nb4 19.Bb7+-) 18.Qd6 (better 18.Bf7 Kf7 19.Qc4 Re6 20.Qg4 g6 21.Ng5 Ke8+-) 18...Nd6 19.Bc6 bc6 20.h3 (20.Ne5 Be2 21.Rc1 c5+-) 20...Bf3 21.gf3 Nc4 (21...c5 22.Ba3+-) 22.Bd4 Rb8 23.d3 Nd6 24.Nd2 Nb5 25.Ba1 (25.Bc5 Ra8+-) 25...Ra8 (25...Rd8 26.d4 c5 27.Nb3 cd4 28.Nd4 Nd4 29.Bd4+-) 26.Nc4 (26.Rb1 Ra2 27.Ne4 Kf8+-) 26...Ra2 27.Ne5 Rc2 28.d4 f6 29.Nd3 h5 30.Rc1 Ra2 (30...Rc1 31.Nc1 g5 32.Nd3+-) 31.Nb4 Ra4 32.Nc6 Nd6 33.Kg2 Nf5 34.Bc3 Ra2 (34...Nh4 35.Kg3 g5 36.f4 Nf5 37.Kf3 Nh4 38.Ke4 f5 39.Ke5+-) 35.e4 Nh4 (35...Ne3 36.Kg1 Nc4 37.Bb4+-) 36.Kg3 Ng6 (36...g5 37.Ne7 Kg7 38.f4+-) 37.h4 Kf7 38.Ba5 Nf8 39.Bc7 Ne6 40.Nd8 (40.Bd6 Rd2 41.d5 Nd4 42.Nd4 Rd4 43.Rc7 Ke8 44.Rg7 Ra4+-) 40...Nd8 41.Bd8 1-0. Van Dael,Siem (2285) - Rusan,P (2105), Titled Tuesday (2), 2020.

7.e3 Nc6 8.Bb2 0-0 9.Nf3 Re8 10.Be2 d5 11.0-0 Qe7 12.d3 (12.Nc3 Be6=) 12...Bd7 (12...Bg4 13.Nc3=) 13.Nbd2 Ng4 (13...Ra8 14.c3 Bd6 15.c4=) 14.Nb3 (14.c3 Bc5 15.d4 Bd6=) 14...Bd6 (14...Ra8 15.c4 dc4 16.dc4=) 15.Qa1 (15.Qd2 Ra8=) 15...f6 (15...Qe6 16.Re1=+ (< 16.Bg7 f6–/+)) 16.Nbd4 (16.Qc1 Nge5=) 16...Nd4 17.Bd4 c5 18.Bb2 d4 19.e4 f5 20.h3 (20.Re1 fe4 21.de4 Ne5=+) 20...fe4 21.de4 Ne5 22.Nh2 (22.Nd2 Ng6–/+) 22...Ng6 (22...Nf7 23.Bd3–/+) 23.Bc4 Kh8 24.Re1 Nh4 (24...b5 25.Bf1–/+) 25.g3 Ng6 26.Bf1=+ Qg5 27.Bc1 Qh5 28.Qa7 Bh3–/+ 29.Qb7 Bf1 30.Nf1 Ne5 31.Nh2 Nf3 32.Nf3 Qf3 33.Bf4 Rf8 34.Qb3 Qb3 35.cb3 Bf4 36.gf4 Rf4 37.Rc1 Re4 38.b4 h6 39.bc5 Re7 40.Rd1 Rc7 41.Rd4 Rc5 42.Kg2 Rg5 43.Kh3 Kh7 44.f4 Rg1 45.Rd6 h5 46.Kh4 g6–+ 47.Rd7 Kh6 48.Kh3 Ra1 49.Kg3 Ra4 50.Rb7 Ra5 51.Rc7 Ra3 52.Kh4 Rd3 53.Ra7 Rc3 54.Rb7 Rf3 55.Rf7 Rf2 56.Kg3 Rf1 57.Ra7 Rg1 58.Kh3 Rb1 59.Kg3 Rb3 60.Kh4 Rb4 61.Kg3 Rb8 62.Rc7 Rf8 63.Ra7 Rg8 64.Kh4 Rf8 65.Kg3 Rc8 66.Rb7 Ra8 67.Rc7 Rh8 68.Kh4 Rb8 69.Kg3 Rb4 70.Ra7 Rb3 71.Kh4 Rb1 72.Kg3 Rg1 73.Kh3 Rd1 74.Kg3 Rd4 75.Rb7 Ra4 76.Rc7 Ra8 77.Rb7 Rf8 78.Ra7 Rf5 79.Rb7 Rc5 80.Ra7 Rc1 81.Rb7 Rg1 82.Kh3 ½–½. Welling – Boey, Liege op, 1981.

7.e3 Nc6 8.Bc3 Bc3 9.Nc3 0-0=.

7.e3 d5 8.Nf3 0-0 9.Be2 Nc6 10.Bg3 Re8 =+.

7.e3 d6 8.Bc3 Bc3 9.Nc3 0-0 10.Nf3 Nc6 11.d4 Bg4 12.Bd3 (12.Be2 Qd7=) 12...Re8 13.0-0 Qd7 14.e4? (better 14.h3 Bh5 15.Be2=) 14...Nd4!-+ 15.e5?? (15.Nd4 Bd1 Pinning (15...Bd1 Deflection)) 15...de5 (15...Bf3 16.Bh7 Nh7 17.Qd4-+) 16.Be2 (16.Ne4 Ne4 17.Be4 Rd8-+) 16...Ne2 17.Qe2 (17.Ne2 Qd1 18.Rd1 e4-+) 17...Bf3 (better 17...e4 18.Ne4 Ne4-+) 18.Qf3 e4 19.Qf4 Qd6 (19...Qc6 20.Qd2-+) 20.Qe3 (20.Qd6 cd6 21.Rb1 Rc8 22.Rb7 Kf8-+) 20...Nd5 (20...Ng4!? 21.Qg3 Qg3 22.fg3-+) 21.Nd5 Qd5 22.h3 f5 23.Ra1 b6 24.Ra7 Ra8?? (24...Qd1 25.Kh2 Qc2 26.Qf4-+) 25.Ra8?? (better 25.Qb3 Rd8 26.Ra8 Qb3 27.Rd8 (27.cb3?? Ra8 28.Kf1 Ra3-+) 27...Kf7 28.cb3+-) 25...Qa8-/+ 26.Qb3 Kf8 27.Qe6 Qa1 28.Kh2 Qf6 29.Qc8 Kf7 30.Qc7 Kg6 31.g3 Qb2 (better 31...Qd4 32.Qc6 Kf7 33.Qc7 Kf6-/+) 32.Qd6= Qf6 33.Qf4 (33.Qc7 Qd4 34.Qc6 Kg5-/+) 33...Qg5 (better 33...b5-+) 34.Qd6= Qf6 35.Qf4?? (35.Qc7 Qd4 36.Qc6 Kg5-/+) 35...Kf7?? (35...b5 36.g4-+) 36.g4?? (36.Qc7!? Qe7 37.Qb6=) 36...g5 (better 36...fg4 37.Qc7 Kg6-+) 37.Qf5?? (better 37.Qc7 Kg6 38.gf5 Kf5 39.Qh7 Ke5 40.Qc7 Kd5 41.Kg2=+) 37...Qf5-+ 38.gf5 Kf6 39.Kg3 Kf5 40.h4 (40.Kg2-+) 40...gh4 41.Kh4 Kf4 42.Kh5 Kf3 43.c4 Kf2 44.c5 e3 (better 44...bc5 45.Kg5 e3-+) 45.c6? (better 45.cb6 e2 46.b7-/+) 45...e2-+ 46.c7 e1Q 47.c8Q Qh1 48.Kg5 Qf3?? (better 48...Qg2 49.Kh4 Qe4 50.Kg5 Qe3 51.Kf6 Qh6 52.Kf7 Qg6 53.Kf8 h5-+) 49.Qc2-/+ Kf1 50.Qf5?? (50.Qb1 Kg2 51.Qb6 Qg3 52.Kh5 Qh3 53.Kg5=+) 50...Qf4 (better 50...Qf5 51.Kf5 Ke2-+) 51.Qf4 (51.Kf4 Kg2 52.Qc2 Kf1 53.Kf3 h5 54.Qf2) 51...Ke1 (51...Ke2+-) 52.Qf3 (52.Qf3 h6 53.Kf4 Kd2 54.Qe3 Kc2 55.Qb6 h5 56.Qc5 Kb3 57.Ke3 Kb2 58.Kd3 h4 59.Qb6 Ka3 60.Kc3 h3 61.Qb3; 52.Qc1 Kf2 53.Kf4 h5 54.Qd2 Kf1 55.Kf3 h4 56.Qf2) 1-0. danishguy (2070) - BATMAN_ISIS (2070), Rated Bullet game, lichess.org, 2020.

7.e3 d6 8.Bc3 Nc6 9.Nf3 0-0 10.Bb5 Bc3 11.Nc3 Bd7 12.d4 Re8 13.Bd3 Re7 14.0-0 Re8 15.d5 Ne5 16.Ne5 Re5 17.e4 Qe7 (17...c6 18.Qb1 Qa5 19.Qb3=) 18.f4+= Re4? (better 18...Rh5+=) 19.Be4+- Ne4 20.Re1 f5 21.Qd4 (21.Qe2!? c6 22.Ne4 fe4 23.Qe4 Qe4 24.Re4 cd5+-) 21...Qh4 22.Re4 (better 22.Qe3 Nc5 23.Ra1+/-) 22...fe4= 23.Qe4 b5 24.g3 Qf6 25.Ne2 Qb2?? (better 25...Qf7=) 26.Qe7+- Qb1 (26...Qa1 27.Kf2 Qa7 28.Ke1 Qa1 29.Kd2 Qa5 30.Nc3+-) 27.Kf2 Bg4 (27...Qc2 28.Qd8 Kf7 29.Qd7 Kf8 30.Qb5 Ke7+-) 28.Qe8 1-0. danishguy (2045) - JahongirAminov (2100), Rated Bullet game, lichess.org, 2020.

7.e4 Nc6 8.Bf6 Qf6 9.c3 Ba5 10.Ne2 0-0 =+.

7.Nf3 0-0 8.c3 Ba5 9.e3 d5 10.Be2 c5 11.0-0 Nc6 12.Bg3 d4 (12...Ne4 13.Bh4 Qd6 14.Qc2=) 13.cd4 cd4 14.Bb5 de3 15.de3 Qd1 16.Rd1 Rd8 17.Rd8 Bd8 18.Na3 (18.Nbd2 Be6=) 18...Be6 19.Nd2 Bd5 20.f3 Bb6 21.Bf2 Be6 22.e4 Bf2 23.Kf2 Nd7 (23...Kf8 24.f4=) 24.Ndc4+= Bc4 25.Nc4 Nc5 (25...Nde5 26.Nd6+=) 26.Nd6 (26.Bc6 bc6 27.Ne5 g5+/-) 26...Na5 27.Ke3 Kf8 28.Kd4 (28.e5!?+/-) 28...Ne6+= 29.Kd5 Nc7 (better 29...Nf4!? 30.Kc5 Ng2=) 30.Kc5+/- Nb5 (30...Nb3 31.Kb6 Nb5 32.Nb5+/-) 31.Kb5 Nb3 32.Nb7 Nd2 33.Kc5 Nf1 34.h3 Ne3 35.g4 Ng2 36.Kd4 g5 37.Ke5 Kg7 (37...Ke7 38.Na5 f6 39.Kd4+=) 38.Nd6 (38.Kf5 h6 39.e5 Ne3 40.Ke4 Nd1+/-) 38...Nf4 (38...Ne1 39.Kf5 Nf3 40.e5+=) 39.h4 (better 39.Nf5!? Kg6 40.Ne7 Kg7 41.h4 f6 42.Kd4 gh4 43.Nf5 Kg6 44.Nh4 Kg5 45.Ke3+/-) 39...Ng6= 40.Kf5 gh4 41.Ne8 Kh6?? (better 41...Kf8 42.Nf6 h3=) 42.g5 Kh5 43.Nf6 1-0. black_bishop_88 (2650) - buldog58 (2495), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

7.Nf3 0-0 8.c3 Ba5 9.e3 d5 10.Bg3 c5?? (10...Ne4 11.Be2=) 11.Be2?? (better 11.Bb8 Bf5 12.Be5+-) 11...Nc6= 12.0-0 Ne4 13.d4 (13.Bf4 Re8=) 13...c4 14.Qc2 Bf5 15.Qb2 Qb6 (15...Ng3 16.hg3 Qd7 17.Nbd2=+) 16.Qb6= Bb6 17.Nfd2 Ng3 18.hg3 Ba5 (18...Rd8=) 19.f3 (better 19.e4!? Be4 20.Ne4 de4 21.Bc4=) 19...b5 20.e4 Be6 21.f4 White prepares e5 (21.Rd1 Rd8=+) 21...f6 (21...de4!? 22.Ne4 b4-/+) 22.f5 Bf7 23.Bf3 Ne7 24.e5? (better 24.Kf2!?=+) 24...Nf5 (24...fe5!? 25.de5 Nf5 26.Re1-+) 25.ef6 g6 (25...Nd6 26.Rf2 b4 27.cb4 Bb4 28.fg7 Kg7 29.Bd1-+) 26.Re1? (26.g4 Nd4 27.cd4 Bb6-+) 26...Ng3 (better 26...b4 27.cb4 Bb4-+) 27.Re5-/+ Bc7 28.Bd5 (better 28.Re7!? Bd8 29.Rd7-/+) 28...Be5-+ 29.Bf7 Kf7 30.de5 Ke6 (30...Rd8 31.Kh2 Rd3 32.Kg1-+) 31.Nf3 Ne4 32.Kh2 (32.Kf1 Ra8 33.Ke2-+) 32...g5 33.Na3 (33.g4-+) 33...h5 (better 33...Nc3 34.Kg3 Ra8-+) 34.Nb5-/+ g4 35.Nbd4 (better 35.Nc7!? Kf7 36.Nd4 Nc3 37.Kg3-+) 35...Kd5-+ 36.e6 Nf6 (36...gf3?! 37.e7 Rg8 38.f7 Rg2 39.Kh3 Rg3 40.Kh2 Rg2 41.Kh3 Rg3 42.Kh2 Rg2=) 37.Ng5 (37.Nd2 Ne8 38.Kg1 Nc7-+) 37...h4 (37...Rg8 38.Nf7-+) 38.e7 (38.Nf5 Ke5 39.e7 Rg8 40.Nf7 Kf5 41.Nh6 Kg6 42.Ng8 Ne8-+) 38...Re8 (better 38...Rg8 39.Nge6 Kd6-+) 39.Nf7?? (39.Nf5 Ke5 40.Nh4 Ne4 41.Ne4 Ke4-+) 39...Ne4 Black intends g3 (better 39...Re7 40.Nh6 Re1 41.g3-+) 40.Nh6 (40.Nf5 Nc3 41.N7d6 Re7 42.Ne7 Kd6 43.Nf5 Kd5-+) 40...g3 41.Kh3 Re7 42.Nhf5 (42.Kh4 Nc3 43.Ndf5 Re1-+) 42...Re5 (42...Rh7!? 43.Kg4 Nc3 44.Nf3-+) 43.Ne3 (43.Ne3 Kc5 44.Kh4 Nc3 45.Ndc2-+). black_bishop_88 (2510) - Sensei64 (2435), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

7.Nf3 0-0 8.Nc3 Ng4 9.Nd5 Ne5 10.Ne5 Bd6 =+.

7.Nf3 0-0 8.e3 d5 9.Be2 Re8 10.0-0 c5?? (10...Nc6 11.Bf4=) 11.d4?? (11.Bb8 Bg4 12.Bf4 Nh5+-) 11...c4?? (11...Nbd7 12.Bf6 Nf6=) 12.Nbd2?? (better 12.Bb8 Bf5 13.Be5+-) 12...Nc6=+ 13.Bg3 h6 14.Qa1 Bf5 (14...Qa5!? 15.Qa5 Ba5-/+) 15.c3= Bf8 16.Rc1 (16.Qb2 Nh5=) 16...Qa8 17.Qb2? (17.Ne5 Qa3=+) 17...Nh5?? (better 17...Ba3 18.Qa1 Bc1 19.Qc1 Qa2-+) 18.Ra1= Qc8 19.Nf1 Ng3 20.Ng3 Bg6 21.h4 (21.Qb5 Qd7=) 21...Qc7 (21...Bd6 22.Nf1=+) 22.h5 Bh7 23.Nh2 Rb8 24.Bf3 Qd7 25.e4 (25.Qb5 Rd8=) 25...b5 26.ed5 Ne7 27.Ng4 Nd5 28.Ne5 Qd6 (28...Qe6 29.Ra5 Nc7 30.Bg4=) 29.Ra7 Be7?? (better 29...Ne7+=) 30.Bd5 Qd5 31.Re7 b4 (31...Rd8 32.Qb4 Bd3 33.Rf7+-) 32.Rf7 (32.Qb4 Qd8 33.Rd7 Qc8 34.Qc4 Qc4 35.Nc4 Kf8+-) 32...Re8 (32...b3+-) 33.Qb4 Re5 (33...Bd3+-) 34.Qf8 1-0. black_bishop_88 (2500) - alba2019 (2435), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

7.Nf3 Nc6 8.Bb2 0-0 9.e3 d5 10.Bd3 Ne4 11.Nc3 (11.0-0 Re8=) 11...f5 (11...Bc3 12.dc3 Qf6 13.0-0=+) 12.Ne2 Bd6 (better is 12...Na5=+) 13.c4? (better is 13.Nf4!?=) 13...Nb4–/+ 14.Qb3?? (better is 14.Qb1 Nc5 15.Nc1 Nbd3 16.Nd3 dc4 17.Nc5 Bc5 18.0-0–/+) 14...Nc5–+ 15.Qc3 Nbd3 16.Kf1 Nb2 17.Qb2 dc4 18.g3 f4 19.ef4 Bh3 20.Kg1 h6 21.Qd4 b5 22.Qd5 Be6 23.Qh5 c6 24.Ne5 Be5 25.Qe5 Bd5 26.Nd4 Re8 27.Qf5 Re1 0–1. Van der Linden,Arie – Fuhs,Juergen (2170), Kleve op, 2001.

7.Nf3 Nc6 8.Bf4 0-0 9.e3 d5 10.Be2 Re8 11.0-0 Bd6 12.Bg5 Be7 13.Nc3 h6 14.Bh4 Ne4 15.Be7 Re7 16.Ne4 de4 17.Ne1 Rd7 18.d4 ed3 19.cd3 Ne5 20.Qb3 c5 21.f4 Nc6 22.Nc2 Re7 23.Rf2 Qa5 (23...Bf5 24.g4 Be6 25.Qb2+=) 24.f5 c4 25.Qc4 Bf5 26.Qf4 Bg6 27.e4 Qc5 28.Bf1 Nd4 29.Nd4 Qd4 30.g3 Re5 31.Kg2 b5 32.Qd2 f5 33.ef5 Bf5 34.Rf4 Qd5 35.Kg1 Bd7 36.Qg2 Qe6 37.d4 Bc6 38.Qf2 Re1 39.Rf8 Kh7 40.Qf5 Attacking the isolated pawn on b5 (40.Qc2 Be4 41.Qd2 Ra1=) 40...Qf5 41.Rf5 Bd7 42.Re5 Re5 43.de5 Kg6 44.Kf2 Bc6 (44...b4 45.Ke3=) 45.Ke3+= Kf5 46.Kd4 Ke6 47.Bh3 Ke7 ½–½. Frontini,Yuri Diego (2055) – Granaldi,Alessandro (1995), Campobasso op, 2006. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

7.Nf3 Nc6 8.Bg3 d5 9.c3 Be7 10.e3 0-0 11.Be2 Ne4 12.0-0 Be6 (12...Ng3 13.fg3 Qd6 14.Bd3=+) 13.Nd4 (13.Bf4!?=) 13...Ng3 14.fg3 Nd4 15.cd4 c5 16.Qa4 Qb6 (16...Qa8 17.Qa8 Ra8 18.dc5 Bc5 19.Rc1=+) 17.Nc3 cd4 18.Rb1 Qc6 19.Qd4 Attacks the isolani on d5 19...Bf6 20.Qb4 Rb8 21.Nb5 (21.Bf3 Bc3 22.Qc3 Qc3 23.dc3 b5=) 21...h6 (21...Qc2!?=+) 22.Nd4= Qd7 23.Bd3 Be7 24.Qb5 Qd6 (24...Qb5 25.Rb5 Bf6 26.Ne6 fe6 27.Rb6=) 25.Rf1 (25.Nc6 Re8 26.Qb7 Bf6+=) 25...Bf6 26.Rf6 (26.Ne6 Qe6 27.Bc2 Qc6=) 26...gf6=+ 27.Bf5 Qa6 28.Qb2 Ra8 29.Kf2 Qa2 30.Qc3 Qc4 (30...Ra3!? 31.Qc1 Bf5 32.Nf5 Kh7=+) 31.Qc4 dc4 32.Ne6 fe6 33.Be6 Kf8 34.Bc4 Rb8 35.Bb3 b5 36.Kf3 Ke7 37.Ke4 Rc8 38.Kd4 Rc1 39.d3 (39.g4 Kd6=) 39...b4 40.g4 Rg1 41.Bd5 Rc1 42.h4 Kd6 43.Bc4 Rc2 (43...Rh1 44.g3-/+) 44.g3 (44.Bd5!?=) 44...Rg2-/+ 45.Ke4 Rg3 46.Kf5? (46.Kf4 Rg1-/+) 46...Rg1 (46...Re3 47.Kf4 Rh3 48.h5-+) 47.Kf6? (better 47.h5-/+) 47...Rg4-+ 48.h5 (48.Bb3-+) 48...Rg3 (better 48...Rc4 49.dc4 b3-+) 49.e4-/+ Kc5 50.e5 Kd4 (better 50...Rg5 51.Bf7 Rg4-/+) 51.e6+= (51.e6 Rf3 52.Ke7=). black_bishop_88 (2610) - VladislavKrasikov_FM (2550), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

7.Nf3 Nc6 8.Bg3 h5 9.h4 (9.e3 Ne4=) 9...d5 10.e3 Ne7 11.c3 Bd6 12.Bd6 Qd6 13.Be2 Ng4 14.0-0 (14.Qb3 0-0=) 14...c6 15.d4 (15.g3 0-0=+) 15...Ng6 (15...Nf5 16.Nbd2-/+) 16.g3 (16.Nbd2 Nh4 17.c4 Nf3 18.Nf3 dc4 19.Bc4 h4-/+) 16...0-0 (16...Ne3!? 17.fe3 Qg3 18.Kh1 Nh4-+) 17.c4 (17.Bd3 Ne3 18.fe3 Qg3 19.Kh1 Nh4-/+) 17...Be6 (17...Ne3 18.c5 Nd1 19.cd6=+) 18.Nbd2 (better 18.c5!? Qc7 19.Qd3+=) 18...Ne3-/+ 19.fe3 (19.c5 Nd1 (19...Nf1?? 20.cd6 Nd2 21.Nd2+-) 20.cd6 Nc3=+) 19...Qg3 20.Kh1 Qh3 (20...Nh4 21.Rg1 Qh3 22.Nh2 Qe3 23.c5 Qd4 24.Qc1-+) 21.Nh2 (better 21.Kg1!?=) 21...Nh4-/+ (worse 21...Qh4 22.c5+=) 22.Bf3 Bg4 23.Qe2 (better 23.Rf2 Nf3 24.Ndf3 dc4 25.Qb1-/+) 23...Re8?? (23...Bf3 24.Ndf3 Nf5 25.Rg1 Ng3 26.Rg3 Qg3 27.c5-+) 24.Qf2?? (better 24.Bg4 hg4 25.Qg4 Re3 26.Qh3 Rh3 27.c5=) 24...Bf3-+ 25.Ndf3 Nf3 26.Qf3 Re3?? (better 26...Qf3!? 27.Nf3 dc4-+) 27.Qh3?? (better 27.Qf7 Kh8 28.Rg1+- (28.cd5?! Re2 29.Qf8 Kh7 30.Qf5 Qf5 31.Rf5 Kg6=; 28.Qb7?! Qe6 29.Qb8 Kh7+=)) 27...Rh3-/+ 28.cd5 cd5 29.Rf5 g6 30.Rd5 Rd3 31.Kg2 b5 (31...f6!?=+) 32.Nf3= b4 33.Kf2 (33.Rb5 Rb3 34.Ne5 Rb2 35.Kf3 Rb1+=) 33...b3 (better 33...f6!?=+) 34.Ke2 Rc3 35.Rb5 Kg7 36.Ne5 (36.d5!?+/-) 36...h4= 37.Kd2 (37.Rb7 h3 38.Rf7 Kg8=+) 37...Rg3 38.Nd3?? (better 38.Rb7=+) 38...h3-+ 39.Nf2 h2 40.Ke1 (40.Nh1 Rg1-+) 40...Rg1 41.Ke2 Rg2 42.Kf3 Rf2! 43.Kf2 h1Q 44.Rb3 Qc6 45.Re3 Qc2 46.Kf3 Qf5 (better 46...g5!? 47.d5-+) 47.Ke2 Qh5 48.Kd3 Qb5 49.Ke4 (49.Ke4 Qf5). black_bishop_88 (2520) - kpera (2320), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

8.d4 d5 9.Bf6 Bf6 10.e3 0-0=.

8.e3 Nc6 9.Bf6 d5?? (better 9...Bf6 10.d4 0-0=) 10.Be7 (10.Bg7!? Rg8 11.Bh6 Bd6+-) 10...Qe7 11.d4 0-0 12.Nf3 (12.Bd3 Qg5 13.Qf3 Ne7+-) 12...Bg4 (12...Bf5 13.Qb3+-) 13.Bd3 Re8 14.0-0 Nd8 (14...b6 15.Nbd2+-) 15.Nbd2 c6 16.Qb3 Ne6 17.Ne5 Bh5 18.c4 Bg6 (18...dc4 19.Nec4 Rd8 20.f4+-) 19.Bg6 hg6 (19...dc4 20.Bf7 Qf7 21.Ndc4+-) 20.cd5 cd5 21.Qd5 Rd8 22.Qf3 Nd4 23.ed4 Rd4 24.Ndc4 (24.Nb3!? Qe5 25.Nd4 Qd4 26.Qb7 Qe5+-) 24...f6 25.Ng6 Qf7 26.Qe3 Rc4 27.Ne7 Kf8 28.h4 (better 28.Re1 b5 29.Qa3+-) 28...Qe7= 29.Qe7 Ke7 30.Rb1 Rh4 31.g3 Rg4 32.Kg2 Kf7 33.Rb7 Kg6 34.f3 Rc4 35.Kh3 Rc2 36.g4 Rc3 37.Kg3 Rc5 38.Rb4 Rc3 39.Re4 f5 40.gf5 Kf5 41.Rf4 Kg5 42.Rg4 Kf6 43.Rf4 Kg6 44.Ra4 Kf6 45.Kg4 Kg6 46.Ra6 Kf7 47.f4 Rc4 48.Kg5 Rc5 49.f5 Rb5 50.Ra7 Kg8 51.Ra6 Rb6?? (better 51...Kf7=) 52.Rb6 Kf8 (52...Kf7 53.Rb7 Kg8 54.f6 Kf8 55.f7 g6 56.Kf6 g5 57.Rb8) 53.Kg6 (53.f6 Ke8 54.fg7 Kf7 55.g8Q Kg8 56.Kf6 Kh7 57.Kf7 Kh8 58.Rh6) 53...Ke8 54.Rb7 (54.Rd6 Ke7 55.Rd5 Kf8 56.f6 Ke8 57.Rd6 gf6 58.Kf6 Kf8 59.Rd8) 54...Kd8 55.Rg7 Kc8 56.Rf7 (56.f6 Kb8 57.Re7 Kc8 58.f7 Kd8 59.f8Q) 56...Kb8 (56...Kd8 57.f6 Kc8 58.Ra7 Kb8 59.Re7 Kc8 60.f7 Kd8 61.f8Q) 57.Rf6 (57.f6 Kc8 58.Ra7 Kb8 59.Re7 Kc8 60.f7 Kd8 61.f8Q) 57...Kb7 58.Kf7 Kc7 (58...Kb8 59.Ke7 Kc7 60.Re6 Kb7 61.Kd7 Kb8 62.Rb6 Ka8 63.Kc7 Ka7 64.f6 Ka8 65.Ra6) 59.Re6 Kd8 (59...Kb7 60.Ke8 Kc7 61.f6 Kb8 62.f7 Kb7 63.f8Q Ka7 64.Qc5 Kb7 65.Rb6 Ka8 66.Qa5) ½-½. danishguy (2080) - ks_7 (2005), Rated Bullet game, lichess.org, 2020.

8.e3 d6 9.Bg3 0-0 10.d4 Nc6 11.Bd3 Bg4 12.Qc2 h6 13.Ne2 Qa8 14.0-0 Qa5 15.f3 Bh5 (15...Bd7!?=) 16.Nd2 Nd5 (16...Ra8 17.Nb3 Qg5 18.e4+/-) 17.Nc4 Qa7 18.e4 b5? (better 18...Nf6+/-) 19.ed5+- bc4 20.dc6?? (better 20.Bh7 Kh8 21.dc6+-) 20...cd3+/- 21.Qd3 Bg6 22.Qe3 (22.Qb5 Rb8 23.Qc4 Bc2+=) 22...Bf6+= 23.Nf4 Bh7 (23...Bg5 24.Re1+=) 24.Nh5 (24.Nd5 Bd8+/-) 24...Bg5 (24...Bd8!?+=) 25.f4+/- Bd8 26.Bf2 (26.f5 Qa2+-) 26...Qb8 (26...Qa5 27.Qf3 Qb5+/-) 27.g4 (27.d5 Bg6 28.Ng3 Bf6+/-) 27...Qc8 (better 27...Qb5=) 28.Qg3?? (better 28.f5+/-) 28...g6-/+ 29.g5 (29.f5 gh5 30.Be3 h4-/+) 29...gh5 30.gh6 Bg6 31.Be3 Qf5 32.d5 Kh7 (32...Qd5?! 33.f5 h4 34.Qg4=) 33.Bd4 (33.c4 Rg8 34.Bd4 Bf6-+) 33...Kh6 (33...Qd5 34.Bg7 Rg8 35.c4-+) 34.h4 Qg4 (34...Rg8!? 35.Kh2-+) 35.Qg4 hg4 36.f5 Bh5 (36...Bh7 37.f6-+) 37.f6 Bg6 38.Rf2 (38.Kf2-+) 38...Kh5 39.Kg2 (39.Be3 g3 (39...Kh4?! 40.Rh2 Kg3 41.Rf2=) 40.Rf4 Re8-+) 39...Kh4 40.Rf4 (40.Kg1 Re8 41.Ra2 g3-+) 40...Re8 41.Bf2 Kh5 (41...Kg5 42.Kg3 Bf5 43.Bd4-+) 42.Kg3 Re2 (better 42...Re4!? 43.Bd4-+) 43.Rg4 Rf2! 44.Rh4 (44.Kf2 Kg4 Deflection (44...Kg4 Overloading)) 44...Kg5 45.Rg4 Kf5 46.Rh4 (46.Rg6 fg6 47.f7 Bh4 48.Kh4 Rf4 49.Kg3-+) 46...Rf3! 47.Kf3 Bf6 48.Ke3?? (48.Rf4 Ke5 49.Kg3-+) 48...Bh4 49.Kd4 Bf6 50.Kc4 Bc3! 51.Kc3 Ke5 52.Kb4 Be4 53.Ka5 Bd5 54.Ka6 (54.Ka6 f5 55.Kb7-+). danishguy (2120) - keev91 (2090), Rated Bullet game, lichess.org, 2020.

8.f3 0-0 9.e4 d6 10.Bg3 Nc6 11.d4 d5 (11...Re8 12.Bd3=) 12.e5 (12.Bd3 Be6=) 12...Nd7 (12...Nh5 13.Bd3=+) 13.Ne2 (13.Bd3 Nb6=) 13...f6 14.Nd2 fe5 15.de5 (15.Qb3!?-/+) 15...Nde5-+ 16.Be5 (16.Nb3 Ng6-+) 16...Ne5 17.Nb3 Be6 (17...Re8 18.Kf2-+) 18.Ng3 Bf7 19.Be2 Qd6 (19...Bg5 20.0-0 Be3 21.Kh1-+) 20.Nd4 (20.Nf5 Qf6 21.Ne7 Qe7-+) 20...Bh4 21.Ndf5 Qf6 22.Nh4 Qh4 23.0-0 Nc4 24.Bc4 dc4 (24...Qc4 25.Qd4 Qd4 26.cd4 Bg6-/+) 25.Qd4 (25.Qd7!?-/+) 25...Qd4-+ 26.cd4 Bd5 (26...Bg6 27.Kf2-+) 27.Re1 (27.Rb1 Rb8-/+) 27...Kf7 28.Ne4 h6 (28...b5 29.Rb1 Rb8 30.Nc3-+) 29.Nc5 (29.Nc3 c6-/+) 29...b6 (29...b5 30.Na6 c6 31.Kf2-+) 30.Nd7 Re8 31.Ne5 Kg8 32.Kf2 b5 33.g4 (33.Rb1 c6-+) 33...b4 34.Rc1 b3 (better 34...c3!? 35.Nd3 Rb8-+) 35.Nc4-/+ Bc4 36.Rc4 Rb8 37.Rc1 b2 38.Rb1 Rb4 (better 38...Kf7!?-/+) 39.Ke3= Kf7 (39...Rb3 40.Kd2=) 40.Kd3+= Ke6 (40...Rb3!? 41.Kc4 Rf3 42.Rb2 Ke6+=) 41.Kc3+/- Rb7 (41...Ra4 42.Rb2 Kd6 43.h4+/-) 42.Rb2 Rb2 (42...Ra7 43.h4+/-) 43.Kb2+- Kd5 (43...h5 44.h3+- (44.gh5?! Kf5+/-)) 44.Kc3 c5 45.dc5 Kc5 46.Kd3 Kd5 47.Ke3 (47.f4 Ke6+-) 47...Ke5 (47...g5 48.f4 gf4 49.Kf4+-) 48.f4 Kf6 49.Ke4 Kg6 50.h4 White prepares g5 50...Kf6 51.Kd5 (better 51.g5 hg5 52.hg5 Kg6 53.Ke5+-) 51...Kg6 (51...h5 52.g5 Kf5+-) 52.Ke6 h5 53.g5 (53.f5 Kh7 54.g5 g6 55.f6 Kg8 56.Ke7 Kh8 57.f7 Kg7 58.f8Q Kh7 59.Qh6 Kg8 60.Qg6 Kh8 61.Qh5 Kg7 62.g6 Kg8 63.Qh7) 53...Kh7 54.f5 g6 (54...Kg8 55.g6 Kf8 56.Kd7 Kg8 57.Ke7 Kh8 58.f6 gf6 59.Kf7 f5 60.g7 Kh7 61.g8Q Kh6 62.Qg6) 55.fg6 (55.f6 Kg8 56.Ke7 Kh8 57.f7 Kg7 58.f8Q Kh7 59.Qh6 Kg8 60.Qg6 Kh8 61.Qh5 Kg7 62.g6 Kg8 63.Qh7) 55...Kg6+- 56.Ke5 1-0. danishguy (2040) - TACTIMANIAUPDATED (2080), Rated Bullet game, lichess.org, 2020.

8.Nf3 Nc6 9.Bf6 Bf6 10.Na3 (10.e3 0-0=) 10...d5=+ 11.d4 0-0 12.Qb3 Na5 13.Qb4 c5 14.Qc5?? (better is 14.Qb2=+) 14...Be7–+ 15.Qb5 Ba3 16.Qa4 Qb6 17.Qa3 (17.e3 Qb1 18.Qd1–+) 17...Qb1 18.Kd2 Nc4. thewidower – JF_, ChessWorld.net, 2005.

8.Nf3 Nc6 9.Bg3 0-0 10.e3 d6 11.Be2 Be6 12.0-0 Nh5 13.Nd4 (13.Qa4 Ng3 14.fg3 Qa8=) 13...Ng3=+ 14.hg3 Nd4 15.cd4 c5 16.Nc3 cd4 17.ed4 d5 18.Qb3 Bf6 19.Bf3 The pressure on the isolated pawn grows 19...Bd4 20.Nd5 b6 21.Qb4 (21.Qc4 Bd5 22.Qd5 Qd5 23.Bd5 Rc8=+) 21...Bc5 (21...Bd5 22.Qd4 Bf3 23.Qd8 Rd8 24.gf3 Rd2 25.Rb1-/+) 22.Qe4 (22.Qc4 Bd5 23.Bd5 Qf6=+) 22...Qd6 (better 22...Bd5!? 23.Qd5 Qd5 24.Bd5 Rd8-+) 23.Nf4 Bd7 (23...Bb3 24.Qb1 Bc4 25.d3=+) 24.Rd1 (24.d4 Ba3= (worse 24...Bd4 25.Rd1 Bf2 26.Kf2 Qc5 27.Qd4+-)) 24...Qd4 (24...Re8 25.Qd5-/+) 25.Qd4 Bd4 26.Nd5 b5 27.Rb1 Rb8 28.Nc3 Attacks the isolani on b5 (28.Be2!?=+) 28...b4-/+ 29.Nd5 b3 30.Ne7 Kf8 31.Nc6 Bc6 32.Bc6 b2 33.Be4 Rc8 34.Kf1 Rc1 35.Ke2 Ke7 36.Bd3 g6 37.g4 Kd6 (37...h6 38.f4-+) 38.f4 Kc5 39.g5? (better 39.Kf3-+) 39...Kb4 40.g3 Kb3 41.g4 Ka2 42.f5 (42.Rb2 Bb2 43.Be4-+) 42...Rb1 43.Bb1 (43.Kf3-+) 43...Kb1 44.fg6 0-1. black_bishop_88 (2470) - filolog (2555), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Bb4 6.Be5 Nf6)

6.b5 Nf6 7.e3 b6 8.Nf3 Bb7 9.c4 Be7 10.Be2 0-0 11.0-0 h6 12.d4 ed4 13.Bd4 Nbd7 14.Nc3 Nc5 15.Bc5 bc5 16.Nd5 Nd5 17.cd5 Qd7 18.Bc4 f5 19.Qd3 f4 (19...Bf6 20.Nd2=) 20.e4 Bc8 (20...Bf6 21.Re1+=) 21.e5+/- de5?? (better 21...Qf5+/-) 22.d6+- Kh8 23.de7 (better 23.Ne5 Qd6 24.Ng6 Qg6 25.Qg6+-) 23...Qe7 24.Re1 Bf5 25.Qd5 (25.Qd2 Rd8 26.Qc1 e4 27.Qf4 Qf6+-) 25...e4 26.Ne5 Rd8 (26...Kh7+-) 27.Ng6 (better 27.Nf7 Kh7 28.Qf5 g6 29.Qf4+-) 27...Bg6-+ 28.Qe4?? (better 28.Qb7 Qe5 29.Qa6-+) 28...Be4 29.f3 Qf6 (29...Rd2 30.fe4 f3 31.Be2 fe2 32.b6 Qf8 33.h3 Rd1 34.b7 Re1 35.Kh2 Qf4 36.g3 Qf2) 30.fe4 Qd4 31.Kh1 Qc4 32.h3 (32.Kg1 Rd2 33.Kh1 Qe4 34.Rg1 f3 35.Rf1 fg2 36.Kg1 gf1R 37.Kf1 Qb1) 32...Re8 (32...Qc3 33.Rb1 Qg3 34.Rg1 f3 35.e5 Rd1 36.Rd1 Qg2) 33.e5 Qd5 (33...f3 34.gf3 Qf4 35.Kg1 Ra8 36.Kg2 Ra2 37.Re2 Re2 38.Kf1 Qf3 39.Kg1 Qg2) 34.e6 Re6 35.Rf1 Rf6 Black prepares the advance f3 (35...Re2 36.Rg1 f3 37.h4 Qe4 38.g4 f2 39.Kh2 fg1R 40.Kg1 Qg2) 36.Kh2 f3 37.gf3 Rf3 (37...Qe5 38.Kg1 Qg3 39.Kh1 Rg6 40.b6 Qh3) 38.Rf3-+ Qf3 39.h4 Qb3 (39...c4 40.b6 cb6 41.Kg1 c3 42.Kh2 c2 43.h5 b5 44.Kg1 c1Q 45.Kh2 Qch1) 40.h5 Qb5 41.Kg2 Qc6 42.Kg3 Qd5 43.Kg4 (43.Kg4 c4 44.Kf4 c3 45.Ke3 c2 46.Ke2 Qg2 47.Kd3 c6 48.Kc3 c1Q 49.Kd3 Qf3 50.Kd4 Qcc3). danishguy (2055) - justanape (1985), Rated Bullet game, lichess.org, 2020.

6.c3 g6 7.Nf3 Bg7 8.g3 Ne7 9.Bg2 0-0 10.0-0 c6 11.d3 Qc7 12.c4 d5 13.Qb3 White intends b5 13...Be6 14.Nbd2 f5? Black intends e4 (14...Na6 15.Bb2=) 15.b5 (15.Ng5 Bf7 16.Rd1+/-) 15...e4? (15...Nd7 16.Ng5 Qd6 17.Bc3+/-) 16.de4 (16.Ng5!? Qd7 17.Bg7 Kg7 18.Qb2 Kh6 19.cd5 Kg5 20.de6 Qe6 21.de4+-) 16...de4+/- 17.Nd4 (17.Ng5 Bd7 18.Bg7 Kg7 19.Qb2 Kg8 20.b6+=) 17...Bf7= 18.bc6 Nbc6 19.Nc6 (19.Nb5 Qb8=) 19...Nc6=+ 20.Bg7 Kg7 21.Qc3 Kg8 22.e3 (22.f3!? ef3 23.Nf3=+) 22...Rd8-/+ 23.Rc1 Qd6 24.Nb3 White prepares c5 24...Qd3 25.Bf1 Qc3 26.Rc3 Nb4 (26...Ne5 27.Nd4=+) 27.Nd4 Nd3 28.c5 Ne5 29.c6 bc6 30.Nc6 Nc6 31.Rc6 Rd1 32.Rc8 Kg7 33.Kg2 Kf6 34.h4 h5 35.Rc6 Kg7 36.Be2 Rd7 37.Bb5 Re7 38.Rd6 Re6 39.Rd7 Kf6 40.Bc4 Re7 41.Re7 Ke7 42.Bf7 Kf7 43.f3 Kf6 44.fe4 fe4 45.Kh3 Kf5 46.Kh2 Kg4 47.Kg2 Kf5 48.Kh3 Ke5 49.g4 Kd5 50.Kg3 Ke5 51.gh5?? (better 51.Kh3 Kd6 52.Kg3=) 51...gh5-+ 52.Kh3 (52.Kf2 Kd5 53.Ke2-+) 52...Kf5 (better 52...Kd5 53.Kg2 Kc4-+) 53.Kg3= Ke5 54.Kh3 Kf5 (better 54...Kd5 55.Kh2 Kc4-+) 55.Kg3= Ke5 56.Kh3 ½-½. ribarisah (2065) - Amon44 (2160), Rated Bullet game, lichess.org, 2015.

6.c4 Nf6 7.e3 Be7 8.d3 c6 9.Nd2 0-0 10.Qb3 Be6 11.Be2 b5 12.Ngf3 bc4 13.dc4 d5 (better 13...Qb6!?=+) 14.Ne5 dc4 15.Bc4 Bc4 16.Qc4 (16.Ndc4 Nd5 17.0-0 Nb4+= (17...Bb4? 18.e4+-)) 16...Bd6 (16...Qd5 17.e4 Qc4 18.Nec4+=) 17.Nc6 (17.Nd3!?+/-) 17...Nc6+= 18.Qc6 Bb4 19.Bc3 (19.Bd4=) 19...Bc3 (better 19...Qc8!? 20.Qc8 Rc8 21.Bb4 Rc1 22.Ke2 Rh1=+) 20.Qc3+/- Nd5 21.Qd4 f5 (21...Qc7 22.0-0 Nc3 23.Qg4+/-) 22.0-0 f4 23.e4 Nf6 24.Qc4 Kh8 25.Nf3 Re8 (25...Qd7 26.e5 Nd5 27.Rd1+-) 26.Ng5 (better 26.e5 Nh5 27.Qf7+-) 26...h6?? (better 26...Qe7 27.Rc1 g6+/-) 27.Nf7+- Kh7 28.Nd8 Rd8 29.e5 Ng4 (29...Ne8 30.Qf4 Kg8 31.Qc4 Kh7 32.Qc2 Kg8 33.Rd1+-) 30.Qe4 g6 (30...Kh8 31.Qf4 h5 32.Qg5+-) 31.Qf4 Ne5 32.Qe5 Rg8 33.Qe7 (33.Rd1 Rg7 34.Rd8 h5 35.Qc3 g5 36.Qd3 Rg6 37.Qd7 Rg7 38.Qf5 Rg6 39.Qf7 Kh6 40.Rh8) 33...Rg7 34.Qf6 1-0. opperwezen (2820) - fo_hi (2170), lichess.org, 2016.

6.e3 Nf6 7.Nf3 Be7 8.d3 0-0 9.Be2 Nbd7 10.c4 Re8 11.0-0 Nf8 12.Nc3 Ng6 13.Qc2 c6 14.b5 Bf5 15.e4 Bg4 16.h3 Bd7 17.Rb1 Nf4 18.Bf1 N6h5 19.bc6 Bc6 (better is 19...bc6 20.Na4 c5=) 20.Rb7?? (better is 20.Nd5+=) 20...g5 (better is 20...Bb7 21.g3 Ng6–+) 21.Qa4?? (better is 21.Ra7+-) 21...Bf8 (better is 21...Ba4 22.Na4 Qa5 23.Be5 de5–+) 22.Qa7 (22.Qa7 Bb7 23.Qb7=) 1–0. Fournier,Frederic (2045) – luman22 (1945), Active, 2002.

6.Nf3 Bg4 7.e3 Nf6 8.Be2 Be7 9.c4 Nc6 (9...e4 10.Nd4 Be2 11.Qe2=) 10.b5= Na5 11.d3 b6 12.0-0 0-0 13.Nbd2 h6 14.h3 Bc8 15.Bc3 Nb7 16.d4 (16.Qc2 Bf5+=) 16...e4= 17.Nh2 Bf5 18.Bg4 Ng4 19.Ng4 Bg5 20.Re1 h5 21.Nh2 d5 (21...h4 22.Qc2+=) 22.cd5 (22.Qh5 g6 23.Qe2 Qd7+/–) 22...Qd5+= 23.Qb3 (better is 23.Qh5 Be7 24.Rb1+=) 23...Qb3–/+ 24.Nb3 Nd6 25.Bb4 Rd8 26.Rf1? (better is 26.Bd6 cd6 27.d5+=) 26...Nb5–+ 27.Rc1 Rc8 28.Nf1 Be6 29.Nfd2 g6 30.f4?? Bd8 31.Kf2 Bd5 32.Nc4 Ra8 33.Nbd2 Ra2 34.Ne5 Kg7 35.g4 Bh4 36.Ke2 hg4 37.hg4 f6 38.Nc6 g5 39.f5 Na3 40.Ne7 c6 41.Nd5+/– cd5 42.Rc7 Kg8 43.Ra7 Ra1 44.Nb3 Re1?? 45.Be1+- (45.Be1 Nb5 46.Rb7 Be1 47.Rb6+-) 1–0. Fournier,Frederic (2090) – nano6515 (1880), Echecs21, 2003.

7.c4 Nf6 8.Nf3 Nbd7 9.Be2 Be7 10.0-0 0-0 11.Nc3 Nb6 12.d3 Qd7 13.Qb3 Ra8 14.b5 Ng4 15.Bb2 h6 16.Ra1 Ra1 17.Ba1 Qd8 18.Bb2 Bh4 19.g3 Be7 20.Na4 Nd7 21.d4 Qa8 22.de5 Nde5 23.Ne5 Ne5 24.Nc5 (24.b6!?=) 24...Bc4+= (worse is 24...dc5 25.Be5 Bd6 26.Qb2+=) 25.Bc4 Nc4 26.Qc4 dc5 27.Qg4 Qf8 28.Be5 Bd6 29.Bd6 cd6 30.Qd7 b6 31.Qc7 g6 32.Qb6 f5 (32...Qe8 33.Qc6 (33.Qd6?! Qb5 34.Qd8 Kg7=) 33...Kf8 34.Qd6 Qe7 35.Qc6+-) 33.Qc6 Qb8?? (better is 33...f4 34.gf4 Qf5 35.Qd6 c4+-) 34.b6 c4 (34...g5 35.Qc7 Qa8 36.b7+-) 35.b7 1–0. Fournier,Frederic – Mephisto Mondial, Match Active, 1999.

7.c4 Nf6 8.Nf3 Nbd7 9.Be2 Be7 10.0-0 0-0 11.Nc3 Nb6 12.d3 Qd7 13.Qc2 Ra8 14.Bb2 Ng4 15.b5 h6 16.Ra1 Ra1 17.Ba1 c6 18.Na4 (18.bc6 bc6 19.c5 dc5+=) 18...Na4= 19.Qa4 cb5 20.Qb5 Qb5 21.cb5 Bd7 (21...f5 22.Nd2=) 22.d4 (22.Nd2 f5 23.d4 e4+=) 22...e4 23.Nd2 d5 24.Bc3 Bd6 25.h3 Nf6 26.Nb3 b6 27.Na1 g5 28.Nc2 Kg7 29.Bb4 Ne8 30.g4 Kf6 31.Kg2 Ke7 32.f3 f5 (32...ef3 33.Kf3 f5 34.Bd6 Kd6 35.Kg3+=) 33.Bd6= Kd6 34.Kg3 (better is 34.fe4!? fe4 35.Kg3=) 34...ef3–/+ 35.Kf3 Nf6 36.gf5 (better is 36.Kg3!?–/+) 36...Bf5–+ 37.Ne1 Bh3 38.Nd3 (38.Bd3–+) 38...Bg4 39.Kf2 Ne4 40.Kf1 Ng3 (40...Ng3 41.Kf2 Ne2–+) 0–1. Fournier,Frederic – Mephisto Mondial, Match Active, 1999.

7.Nf3 Nf6 8.c4 Nbd7 9.d4 Be7 10.Nbd2 0-0 11.Be2 c6 12.0-0 e4 13.Ng5 Bf5 14.f3 ef3 15.Bf3 (worse is 15.Ndf3 Ng4 16.e4 Bg5 17.ef5 Be3 18.Kh1 Nf2 19.Rf2 Bf2–+; 15.Rf3?! Bg4 16.Rf1 Be2 17.Qe2 d5=; 15.Ngf3?! Re8=) 15...Ne8 (15...d5 16.Qb3=) 16.Be4 (better is 16.Nge4!?+=) 16...Bg5+= 17.Bf5 Be3 18.Kh1 Nef6 19.Ne4 Ne4 20.Be4 Nf6 21.Bc2 d5 22.Qd3 Re8 23.c5 Qc7 24.Rf6 gf6 25.Qh7 Kf8 26.Bg6?? (better is 26.g3–/+) 26...fg6–+ 27.Qc7 Bf4!! (27...Bf4 28.Qd6 Bd6–+) 0–1. Fournier,Frederic – Mephisto Mondial, Match Active, 1999.

7.Nf3 Nf6 8.c4 Nbd7 9.d4 Be7 10.d5 Bf5 11.Nc3 0-0 12.Nh4 Bg4 13.Be2 (13.f3!? Ne8 14.fg4 Bh4 15.g3=) 13...Be2+= 14.Qe2 Nd5 15.Nd5 (15.Nd5 Bh4 Discovered attack; 15.cd5 Bh4 Discovered attack) 15...Bh4 16.0-0 c6 17.Nc3 Nb6 18.Rd1 Qe7 19.Ne4 d5 20.cd5 Nd5 21.Qb2 (21.b5 Rd8–/+) 21...f5–/+ (worse is 21...Nb4 22.Nd6 Nd5 23.Nf5=) 22.Nc5 e4 23.Ne6 (23.Qb3!?–/+) 23...Bf6–+ 24.Nd4 Be5 (24...Qb4 25.Qa2–+) 25.b5–/+ Qd6 26.g3? (better is 26.bc6 bc6 27.h3–/+) 26…c5 0–1. Fournier,Frederic – Mephisto Mondial, Match Active, 1999.

7.Nf3 Nf6 8.c4 Nbd7 9.d4 Be7 10.d5 Bf5 11.Be2 c6 12.dc6 bc6 13.0-0 0-0 14.Nbd2 Qb6 15.Bc3 Ra8 16.Qb3 Qb7 17.b5 Nc5 18.Qb2 Na4 19.Qb3 Nc3 20.Qc3 cb5 21.cb5 Rb8 22.Qc6 Bd7 23.Qb7 Rb7 Attacks the isolani on b5 24.Rb1 e4 (24...Nd5 25.Ne4=) 25.Nd4+= d5 26.Nc6 Bd6 27.h3 Rb6 28.Rc1 g6 29.Nb3 Ba3 30.Rc3 Bf8 31.Nbd4 Bd6 32.Rc1 Kf8 33.Ra1 h5 34.Ra8 Kg7 35.Ra7 Kf8 36.Ra8 Kg7 37.Ra6 Bc7 38.Ra7 Bd6 39.Ra6 Bc7 40.Ra7 ½–½. Fournier,Frederic – Mephisto Mondial, Match Active, 1999.

5.Ra2 Nc6 –/+.

5.Ra3 Ra3 6.Na3 f6 (6...Nc6 7.Bb2=) 7.Bb2 Ba3 8.Ba3 b6 9.e4 d6 10.Bc4 Ne7 11.Qh5 Ng6 12.Ne2 Bb7 (12...Qe7 13.Qd5 Bd7 14.Qb7+=) 13.0-0 Nd7 (13...Qe7 14.d3+/–) 14.Nf4 Nde5 15.d4 Be4 16.de5 fe5 17.Re1 Bc2 (17...Qa8 18.Bd5! Qa5 19.Re4 Qa3+-) 18.Ng6 Bg6 19.Re5 Kd7 (19...Qe7 20.Re7 Ke7 21.Qe5 Kd8 22.Bd6 Kd7 23.Qe7 Kc6 24.Qc7) 20.Qg4 Kc6 (20...Bf5 21.Qf5 Kc6 22.Qe4 d5 23.Bd5 Kb5 24.Qb4 Ka6 25.Qa4) 21.Bd5 (21...Kb5 22.Qb4 Ka6 23.Qa4) 1–0. smoothmovermovesagain – SIRMO, ChessWorld.net, 2006.

5.Ra3 Ba3 6.Bg7 Bb2 7.c3 += (< 7.Bb2 Nf6=+).

5.Ra3 Ba3 6.Bg7+/- Bc5 7.Bh8 Nc6 8.Nf3 d5 9.e3 f6 10.Bd3 Bg4 (10...Qe7!?+/-) 11.h3 Bh5 12.Nc3 (better 12.Bh7!? Nh6 13.g4+-) 12...Bg6+= 13.Bg6 hg6 14.0-0 Kf7 15.e4 Nge7? (better 15...Nh6 16.Bf6 Qf6 17.Nd5 Qd8+/-) 16.Bf6!+- Kf6 17.ed5 1-0. black_bishop_88 (2570) - Mpoumphs (2610), lichess.org, 2020.

5.Na3 Ra3 6.Ra3.

5.Na3 Nc6 6.Nb5 Ne5 (6...Ra1 7.Qa1 Nb4+/–) 7.Ra8+- Nc6 8.Nf3 Nf6 9.e3 Nd5 10.Be2 Nb6 11.Ra1 Be7 12.0-0 0-0 13.c4 (13.d4 d5+-) 13...d5 14.cd5 Nd5 15.Na7 (15.d4 Be6+-) 15...Na7 16.Ra7 Bf5 (better is 16...Bc5!? 17.Ra8 Nb6+-) 17.Rb7 Be4 18.Ra7 Bd6 (18...Bc5 19.Ra4 Nb4 20.Ra5+-) 19.Qb3 (19.d3 Nc3 20.Qc2 Ne2 21.Qe2 Bd3=) 19...Nb4 (19...Bc5 20.Ra4 Re8 21.d4+-) 20.d3 (20.d4!? Bd5 21.Qc3 Nc6+-) 20...Nd3 21.Bd3 Bf3?? 22.gf3 Qg5 23.Kh1 Qh5 24.f4 Qf3 ½–½. Windelboe,Werner – Jensen,Vagn (2250), Aarhus op, 1994.

5.Na3 d6 6.Bb2 Nf6 7.Nf3 Nc6 8.e3 Be7 9.g3 0-0 10.Bg2 Bg4 11.0-0 Qd7 12.Nb5 Ne5 13.Be5 de5 (better 13...Qb5!? 14.Bf6 Bf6 15.Ra8 Ra8=+) 14.Ra8+/- Ra8 15.Ne5 Bd1 16.Nd7 Nd7 (16...Be2 A) 17.Bb7?! Ra5 (worse 17...Nd7 18.Ba8 Bb5 19.Ra1+/-; worse 17...Bf1 18.Nf6 Bf6 19.Kf1+=) 18.Nf6 Bf6=; B) 17.Nc7?! Rc8 18.Nf6 Bf6+/-; C) 17.Nf6 Bf6 18.Rb1 Bb5 19.Rb5 (19.Bb7 Ra1 20.Ra1 Ba1-/+) 19...Ra1 20.Bf1+/-) 17.Rd1 c6 18.Nc3 g6 (18...Bb4 19.Ne2+/-) 19.Rb1 Ra7 20.Kf1 Bf6 (20...Kg7 21.d4+/-) 21.d4+- c5 (better 21...Be7!?+-) 22.Bh3 cd4 (22...Nb8 23.Ne4 Be7 24.dc5+-) 23.Ne4 (23.Bd7?! dc3 24.Ke2 Ra2=) 23...de3 24.Bd7 Be7 (24...Bd4 25.Rd1 Bb6 26.Nf6 Kg7 27.Nd5+-) 25.fe3 f5 26.Be6 Kg7 27.Nf2 Bc5 28.e4 Kf6 29.ef5 gf5 30.Nd3 Bd6 (30...b6 31.Bd5+-) 31.Bd5 h5 (31...Ra5 32.c4+-) 32.Rb6 Ke7 33.Nf4 1-0. Reprimand (2425) - kianas (2020), ChessWorld.net, 2011.

5.Na3 f6 6.Bc7!? Qc7 7.Nb5 Ra1 (7...Qc6 8.Ra8 Qb5 9.Rb8 Ne7+-) 8.Nc7 Kd8 9.Qa1 Kc7 10.e4 Ne7 11.Qc3 Nbc6 12.Bc4 Ng6 13.Ne2 Bb4 14.Qe3 Nge5 15.Bb3 b6 16.c3 Bc5 (16...Bd6 17.d4 Ng6 18.Bc4+-) 17.d4 Ng4 (17...d6 18.dc5 dc5 19.Qg3+-) 18.Qg3 (18.dc5?! Ne3 19.cb6 Kb6 20.fe3 Ba6=) 18...Bd6 (18...Nge5 19.Qg7 Re8 20.de5 Ne5 21.Nd4+-) 19.Qg4 h5 (19...g6 20.Qh4+-) 20.Qg7 Rd8 (20...Re8 21.Qg6 Rf8 22.Qh5+-) 21.Qf6 Na5 22.Bd5 Ba6 23.Qh6 Nc4 24.Qh5 b5 25.Bc4 bc4 26.Qa5 (26...Kb7 27.Qd8+-) 1–0. orane (2110) – cookboy50, Live Game Caissa's Web, 2004.

5.Na3 Nf6? 6.Bc7!+- Qc7 7.Nb5 Qb6 8.Ra8 Qb5 9.Rb8 Kd8 (9...Qc5 10.e3+-) 10.Ra8 Qf5 (10...Bc5 11.e3 Qb2 12.Nh3+-) 11.e3 1–0. bollewillem (2235) – marinscrofan (1740), gameknot.com, 2014.

5.Nc3 Nc6 6.Bf4 –/+.

5.Nc3 Qg5 6.Bg3 (6.Bc7!? Qc5 7.Bf4=) 6...Bb4 7.f4 Qf6 (better is 7...Qa5!? 8.Na2 Bc5–+) 8.Nd5+= Bd2 (better is 8...Qd6 9.e4 f5+=) 9.Kd2+/– Qd4 10.Ke1 Qd1 11.Rd1 Kd8 12.f5 a2?? (12...d6 13.e4+/–) 13.Ra1 (better is 13.Bc7 Ke8 14.Ra1+-) 13...d6+/– 14.Nc3?? (better is 14.e4+/–) 14...Bf5= 15.e4 Be6 16.Nf3 Nc6 17.Nd2 Nd4 18.Kd1 Bg4 (18...Ra3 19.Bf2 Nc6+= (19...Rc3?? 20.Bd4 Nf6 21.Bc3+-)) 19.Kc1+= Ra3 (19...Be6 20.Kb2+=) 20.Na2 h5 21.Kb2 Ra5 22.Nc4 Rb5 23.Kc3 Ne6 (better is 23...Ne2 24.Be2 Be2 25.Bd6 Rg5+-) 24.h3 Nf6 25.hg4?? (better is 25.Nd2 Ng5 26.Bb5 Nge4 27.Ne4 Ne4 28.Kd4 Ng3 29.hg4 Nh1 30.Nc3 (worse is 30.Rh1 h4+-) 30...c5 31.Kd5+-) 25...Ng4?? (better is 25...Ne4 26.Kd3 Ng3=) 26.Nb4+- c5 27.Nd3 Nf6 28.Nd6 Ne4 29.Ne4 Ke7 30.Bd6 Ke8 31.Ra8 Nd8 32.Bc7 Ke7 33.Ndc5 h4 34.Bb5 Rh5 35.Bd8 Kf8 36.Bh4 1–0. jo3977 – karlsdad, ChessWorld.net, 2012.

5.Nf3 Nf6 6.Qc1 Nc6 7.Bc3 (better 7.Na3 Ne5 8.Ne5=+) 7...a2-+ 8.e3? (better 8.Bf6 Qf6 9.Nc3-+) 8...ab1Q (8...ab1N?! 9.Ra8 Nc3 10.dc3-+) 9.Qb1 Ra1 10.Qa1 d5 11.Bb5 Be7 12.0-0 (12.Ne5 Qd6-+) 12...0-0 13.Rb1 Re8 14.Bd3 Bf8 (14...Qd7 15.Qb2-+) 15.Ng5 (15.Bf6 Qf6 16.Qf6 gf6-+) 15...Ne4 16.Ne4 de4 (16...Re4?! 17.Be4 de4 18.Qa4-+) 17.Bc4 Be6 (better 17...Qg5!? 18.Rb5 Qg6 19.d3-+) 18.Be6 Re6 (18...fe6?! 19.Rb7 Qd5 20.Qa6-+) 19.Rb7 Qg5 (19...Rg6 20.Kh1-+) 20.g3 (20.Rc7 Rg6 21.Qf1 Qd8-+) 20...h5 (20...Re7 21.Qa6 Qg6 22.d3-+) 21.h4 (21.Rc7 Qd8 22.Rb7 h4-+) 21...Qg4 22.Rb5 (22.Rc7 Ne7-+) 22...f6 (22...Be7 23.Rb7 Bh4 24.Qa8 Kh7 25.Qf8-+) 23.Qa2 Kh7 (better 23...g6-+) 24.Qd5? (24.Rh5 Kg8-/+) 24...Bd6 (better 24...Ne5 25.Ra5 Rd6-+) 25.Qh5 Qh5 26.Rh5 Kg6 27.Rb5 Ne5 28.Be5 Be5 (28...Re5 29.Re5 fe5 30.Kg2-/+) 29.d4 ed3! 30.cd3 Rc6 31.d4 Rc1 32.Kg2 Bd6 33.Kf3 Rc2 34.h5 Kh6 35.Rb3? (35.g4 c5=+) 35...Rc1 (35...Kh5 36.g4 Kh4 37.Rb1-+) 36.Ke4 (36.g4 g6 37.Rb5 Rc2=+) 36...Rc4 (36...Kh5 37.Kf5 Rf1 38.f4-+) 37.f4 (37.g4 g6=+) 37...g6 (37...Kh5!? 38.Kf5 Ra4-+) 38.g4 (38.hg6 Kg6 39.Kd5 Rb4 40.Rb4 Bb4=) 38...gh5-/+ 39.gh5 Kh5 (39...Rb4 40.Rb4 Bb4 41.Kf5=+) 40.Kf5 Rb4 41.Rc3 Rb2 (41...Rb5 42.Kf6 Kg4 43.Kg6=+) 42.Rc1 (better 42.e4!? Kh4 43.e5 fe5 44.fe5+=) 42...Re2?? (better 42...Rb5 43.Kf6 Kg4=+) 43.Rh1 (43.Rh1 Rh2 44.Rh2) 1-0. black_bishop_88 (2435) - impredecible (2330), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.Be5 ba3)

5.a4 Nc6 6.Bg3 (6.Bb2 d5=+) 6...d5 7.Nf3 Bc5 8.e3 0-0 9.d4 Bd6 10.Bd3 Bg4 11.0-0 (11.Bd6 Qd6 (worse 11...cd6 12.h3 Bh5 13.Nbd2+=) 12.Nbd2 Rfe8=+) 11...Ne4 12.Nbd2 (12.Bd6 Qd6 13.Re1 Ra5-/+) 12...Ng3-/+ 13.hg3 Re8 14.Qb1 Na5 15.Rc1 b6 16.c4 dc4 17.Bh7 Kh8 18.Nc4 (18.Bf5!? Bf3 19.gf3=+ (19.Nf3? Nb3-+)) 18...Nc4-/+ 19.Rc4 Qf6 (better 19...b5 20.Rc1 ba4=+) 20.Be4+/- Rad8 21.Bc6 Re6 22.d5 Re7?? (better 22...Bf5 23.Rh4 Kg8+/-) 23.Rg4+- g6 24.Rh4 (24.Nd2 Be5 25.Ra2 Bc3+-) 24...Kg7 25.Ra2 Be5 (25...Rh8 26.Rh8 Kh8 27.Nd2+-) 26.Ne5 Re5 27.Rb4 Rh8 28.Rh4! Rh4 29.gh4 Qh4 30.g3 Qh3 31.d6! cd6 32.Qb6 Rh5 (32...Rc5 33.Ra1+-) 33.Bg2 White intends a5 (33.Qd4 Kh7 34.Qd6 Qh2 35.Kf1 Qh3 36.Ke1 Qf5+-) 33...Qh2 34.Kf1 Rc5 35.Qb2 Kh7 36.a5 Qh5 37.Ra1 (better 37.Qa1 Rc7 38.Ke1+-) 37...Rb5 (37...Ra5 38.Rb1+-) 38.Qe2 (better 38.Qa2!? Qc5 39.Qf7 Kh8+-) 38...Qc5 (38...Ra5 39.Qh5 Rh5 40.Rd1+-) 39.a6 Rb8 (39...Ra5 40.Ra5 Qa5+-) 40.a7 (40.a7 Rh8 41.a8R+-) 1-0. black_bishop_88 (2455) - iron_fistt (2480), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.Be5 Nf6)

5.ab4 Ra1 6.Ba1 Bb4 7.e3 0-0 8.Nf3 d5 9.Be2 Nbd7 10.0-0=+ c6 11.d3 (11.Nc3 Nc5=+) 11...Bd6 12.Nbd2 b5 13.Nd4 (13.Nb3 Qb6=) 13...Qc7 (13...Ne5 14.Bb2=+) 14.h3 (14.f4 Nc5=) 14...Re8 (14...Nc5 15.N4f3=+) 15.Qb1 (15.Nf5 Bf8=+) 15...Bb7 (15...Nc5 16.N4f3=+) 16.N2f3 (16.Nf5 Bf8=) 16...Bf8 (16...g6 17.Rd1=+) 17.c3 (17.Bb2 b4=+) 17...Ra8=+ 18.Qc2 (18.Bb2 Qb6=+) 18...Qb6 19.Rb1 (19.c4 b4=+) 19...g6 (19...c5 20.Nb3=+) 20.Nd2 (20.Nb3 c5=+) 20...Be7 (20...c5 21.N4f3=+) 21.Qb2 (21.N4f3 Qc7=+) 21...Ra4 22.Bd1 (22.Qc2 Qa6 23.Bb2 Ra2=+) 22...Ra8 (22...Ra5 23.Be2=+) 23.Be2=+ Ra4 24.Bd1 Ra6 (24...Ra5 25.Qc2–/+) 25.Be2 Qa7 (25...Nc5 26.c4 Na4 27.Qc2=) 26.Qc1 Ra5 (26...Ra4 27.Bb2=+) 27.N2b3 (27.Bb2 Bd6=+) 27...Ra2 28.Rb2 (28.Bb2 Qa4=+) 28...Ra4 29.Rb1 Qb6 (29...Bd6 30.Bb2=+) 30.Nd2=+ ½–½. Domingo,Jordi (1970) – Germanes,Ramil (1980), FICGS, 2010.

5.ab4 Ra1 6.Ba1 Bb4 7.Nf3 0-0 8.e3 d5 9.Be2 Bf5 (9...Re8 10.c4=) 10.0-0 Nbd7 (10...Re8 11.Nc3=) 11.Bc3 Bd6 12.Nd4 Bg6 13.d3 (13.f4 h6=) 13...c6 14.Nd2 Qc7 15.f4 h6 16.N2f3 (16.Qe1 b5=) 16...Re8 17.Bd2 Bh7 18.Nh4 Ra8 19.g4 (19.Bc3 b5=) 19...Ne8 20.Nhf5 Bf8 21.Qe1 (21.Bf3 Bc5+=) 21...b5 22.Bf3 Nd6 23.Ng3 Qb6 24.g5 hg5 25.fg5 Ne5 26.Bg2 Re8 27.h4 (27.Qf2 b4=) 27...b4 (27...c5 28.Ndf5 Nf5 29.Nf5+=) 28.Bb4= c5 29.Ba5 Qb7 (29...Qb2 30.Bc3 Qa2 31.Nde2+=) 30.Nde2 (30.Ndf5 c4+=) 30...c4 (30...Ng4 31.Bd2 Ne3 32.Be3 Re3 33.Qf2+/–) 31.h5 (31.Nf4 cd3 32.Nd5 Qc8 33.cd3 Nd3=) 31...cd3 32.Nf4 dc2 (better is 32...Qb5!? 33.g6 fg6 34.Nd5 Rc8=) 33.g6+/– Kh8 (33...Ne4 34.gh7 Kh7 35.Nd5+/–) 34.gh7 Ndc4 35.h6 (35.Bd2 Ba3 36.h6 gh6+/–) 35...Nd3+= 36.Nd3 Re3 37.Qf2 (37.Ne2 Rd3 38.Bd8 Qa7 (38...gh6 39.Qf2 Bg7 40.Nc1–/+; 38...Kh7 39.hg7 Bg7 40.Qh4 Kg8 41.Qg5 Qa7 42.Kh2–+) 39.Kh2 Re3=) 37...Rd3 38.Bd8 Rd2 (better is 38...Ne3!? 39.hg7 Bg7–/+) 39.Ne2= Rd1 40.hg7 Bg7 41.Bf6 (better is 41.Bg5!?=) 41...Qb6–/+ 42.Bg7 Kg7 43.Qb6 Nb6 44.Kh2 Kh7 (44...Rf1!? 45.Bf1 Nc4–/+) 45.Rf7–/+ Kg6 46.Rc7 Rd2 ½–½. Cirulis,Ilmars (1930) – Nichols,Scott (2265), FICGS, 2016.

5.Nf3 ba3=+ 6.Bb2 a2 7.Nc3 d5 8.e3=.

5.Nf3 ba3=+ 6.Bb2 a2 7.Nc3 Qe7 8.e3 (8.Ra2 Ra2 9.Na2 d5=) 8...Qe6 (8...d5 9.Be2=) 9.Nd4 (9.Nb5 Kd8=) 9...Qb6 10.Qc1 (10.Nb3 d5=) 10...c5 11.Nf3 d5 12.Na2 (12.Ra2 Ra2 13.Na2 Be7=) 12...d4 (12...Be7 13.Be2=) 13.Bc4 Be6 14.Be6 Qe6 15.Qb1 Be7 16.0-0 de3 17.fe3 0-0 18.Nc1 (18.Nc3 Nc6=) 18...Ra1 (18...Na6 19.Nd3=) 19.Ba1 Qa6 ½–½. MickeyMouse – shaip, ChessWorld.net, 2002.

5.Nf3 Nc6 6.ab4= Ra1 7.Ba1 Bb4 (7...Nb4 8.e3=) 8.e4 (8.e3 0-0=) 8...Ne4 (8...0-0 9.e5 Ne4 10.Bd3=+) 9.Bg7= Rg8 (9...Qe7 10.Qe2 Rg8 11.Bh6=) 10.Bb2 (10.Bh6 d5=) 10...Qe7 11.Qe2 Ng5 (11...d5 12.c3 Bd6 13.d3=+) 12.Qe7 Ke7 13.Ng5 Rg5 14.f4 (14.c3 Bd6=) 14...Rg6 (14...Ra5 15.Bd3 h5 16.Kd1=) 15.Nc3 (15.f5 Rg5 16.f6 Ke6=) 15...Bc3 16.Bc3 d5 17.Kd1 (17.d4 Bf5 18.Kd2 b5=) 17...Bf5 18.Rg1 Kd6 (18...Re6 19.g4 Be4 20.Bg2=) 19.Be2 (19.d4 Be4=) 19...Bg4 (19...Be4 20.g3=) 20.Bg4 (20.Re1 d4 21.Bb2 Be2 22.Re2 h5=) 20...Rg4 21.g3 d4 22.Bb2 Rg8 23.Rf1 Kd5=+ 24.Rf3 Na5 25.Ra3 Nc4 26.Rb3 Nb2 27.Rb2= b6 28.Rb5 Kc4 29.Rf5 Rg7 30.Ke2 h6 31.Rf6+/– c5 32.Rb6 Rh7 33.d3 Kd5 34.g4 h5 35.g5+- Rh8 36.Rh6 Re8 37.Kf2 c4 38.Rh5 Kc5 39.g6 Kb4 40.gf7 Rf8 41.Rf5 Kc3 42.dc4 Kc2 43.c5 d3 44.c6 d2 45.Rc5 Kd3 46.Rd5 Kc3 47.c7 (47...Rc8 48.h4+-) 1–0. Ventimiglia,Charles – Edwards,Bevan, IECG, 1998.

5.Nf3 d5 6.ab4 Ra1 7.Ba1 Bb4 8.c4=.

5.Nf3 d5 6.ab4 Ra1 7.Ba1 Bb4 8.e3 0-0 9.Be2 Nc6 10.0-0 Bf5 11.Nc3 Qe7 12.Qb1 forfeited 1–0. Bendig,Frank (2380) – Jordaan,Wayne (1750), IECG, 2004. (=1.a3 e5 2.b4 a5 3.Bb2 ab4 4.Be5 Nf6)

4.b5 a4 5.f4+= Ke7? (better 5...f6!? 6.fe5 fe5+=) 6.c4 (6.fe5!? Bc5+-) 6...Kf8 (better 6...f6+-) 7.Kf2?? (better 7.fe5 Be7 8.Nf3+-) 7...ef4 8.Qb3?? (8.Nf3 Qe7=+) 8...f5 (better 8...ab3 9.Nf3-+) 9.Qa2?? (better 9.Qf3 Nf6 10.Ke1=) 9...Ne7 (better 9...Qh4 10.Kf3 g5-+) 10.e3 (10.e3 fe3 11.de3-+). pereira – Andrishi, internet, 2021.

4.b5 Nf6!?=.

4.e4 ab4 5.Nf3 ba3 6.Na3 b5 (better is 6...Ba3 7.Ba3 d6=+) 7.Nb5+/– (7.Be5?! Be5 (7...Ra3? 8.Ra3 Ba3 9.Bg7+-; 7...Ba3? 8.Bg7 f5 9.Nd4+-) 8.Ne5 Bb7+=; 7.Bb5?! Bb7 8.0-0 Be4+/–) 7...Ra1 8.Qa1 c6?? (better is 8...f6+/–) 9.Nd6+- Kf8 10.Ne5 Nh6 11.Nef7! Qe7 (11...Nf7 12.Bg7) 12.Bg7 (12...Kg8 13.Nh6) 1–0. Double Wood – xCalvin, ChessWorld.net, 2005.

(--> 1.b4 e5 2.Bb2 e4 3.a3 a5).

4.b5 d5 5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 d5 4.a3 a5 5.b5).

4.b5 Nf6 5.c4 (--> 1.b4 e5 2.Bb2 e4 3.c4 Nf6 4.a3 a5 5.b5).

4.c4 Nf6 (--> 1.b4 e5 2.Bb2 e4 3.c4 Nf6 4.a3 a5).

4.ba5 (--> 1.b4 e5 2.Bb2 f6 3.a3 a5 4.ba5).

4.b5 d5 5.d4 ed4 6.Qd4 Bd6 7.Nf3 Ne7 8.Nc3 c5 9.bc6 Nbc6 10.Qd2 0-0 11.Nd5 Be6 12.Nf4 Bc4 13.Rb1 Qc7 14.e3 Bf1 15.Nd5 Nd5 16.Qd5 Kh8 17.Kf1 Rfd8 18.Qe6 Re8 19.Qb3 a4 20.Qc4 Qb6 21.Nd2 Ra5 22.Bc3 Ne5 23.Rb6 Nc4 24.Nc4 Rd5 25.Nd6 Re6 26.Nf7 Kg8 27.Nh6 gh6 28.Re6 Rd1 29.Be1 Ra1 30.Rf6 Ra3 31.Rb6 Ra2 32.c4 a3 33.Rb3 Ra1 34.Rb7 a2 35.Ra7 Kf8 36.Ke2 Ke8 37.Rf1 Kd8 38.Ba5 1–0. marus1 – razobazam, internet, 2001.

4.e4! Adam.

4.Bb2 d6 5.c4 Nd7 6.e3 e4 7.Ne2 Nc5 8.Ng3 h5 (8...Be6 9.Nc3 Qh4 10.Qh5 Qh5 11.Nh5=) 9.h4 (9.Nh5 Qg5 10.Nf4 Bg4+/-) 9...Bg4= 10.f3 ef3 11.gf3 Be7? (better 11...Bd7=) 12.fg4+/- Bh4 13.Rg1 Ne4 14.Qf3 (14.Bg7 Rh7 15.Qc2 f5 16.gf5 Ng3+=) 14...Ng3= 15.Rg3 (15.Bg7 Nf5 16.Kd1 Ng7 17.gh5 Nh5 18.Qe4 Be7 19.Qb7 Ra5-/+) 15...Nf6 (worse 15...Bg3 16.Qg3 h4 17.Qh3+/-) 16.g5 Ng4 (worse 16...Bg3 17.Qg3 Ng4 18.Qf4+/-) 17.Kd1 Nh2?? (better 17...Bg3 18.g6 fg6 19.Qg3 Qg5+=) 18.Qe4+- (18.Qe4 Qe7 19.Qh4 Nf1 20.Rf3 Nd2 21.Nd2+-) 1-0. BeepBeepImAJeep (2870) - is_er_nog_hoop (2445), lichess.org, 2017.

4.Bb2 d6 5.c4 f5 6.Nc3 Nf6 7.Na4 Nbd7 8.Nc3 Be7 9.e3 0-0 10.Qc2 e4 (10...Nc5 11.d4 ed4 12.ed4+=) 11.d4 c6 12.a4 Qe8 (12...Qa5 13.Nh3+=) 13.Nh3 Qh5 14.Nf4 Qh6 15.h4 (15.Be2 c5+/-) 15...Ng4 16.g3 g5 (16...Ndf6 17.a5+/-) 17.Ng2 (17.Nh3 gh4 18.Nf4 Bg5+-) 17...gh4 (17...Ngf6!?+/-) 18.Nh4 f4? (better 18...Bf6+-) 19.Qe4 Nf2 (19...Bh4 20.Rh4 Ndf6 21.Qf4 Qf4 22.gf4 cb5 23.cb5 Ra5+-) 20.Qe7 (20.Kf2 fg3 21.Ke1+- (21.Kg3 Nf6 22.Qg2 Qe3 23.Nf3 Kh8-+)) 20...Nh1+/- 21.gf4 (21.bc6 bc6 22.gf4= (worse 22.ef4 Ng3 23.Bg2 Nf6 24.Bc6 Ra6 25.Bd5 Kh8-+)) 21...Nf6=+ 22.Nf3 Re8 23.Qe8?? (23.Qd6 Re3 24.Be2-/+) 23...Ne8-+ 24.0-0-0 (24.Bg2 Ng3 25.Kf2 Qg6-+) 24...Bg4 25.Be2 (25.Be2 Ng3 26.Rg1 Ne2 27.Ne2-+). dale70 (1990) - zuriko (2020), Rated Blitz game, lichess.org, 2015.

4.Bb2 d6 5.c4 g6 6.e3 Bg7 7.Nc3 Ne7 8.Na4 0-0 9.Nc3 f5 10.Nf3 c6 11.d4 e4 12.Nd2 d5 13.a4 (13.Qb3 Be6+/-) 13...h6 (13...f4 14.cd5 cd5 15.Qb3 fe3 16.fe3+/-) 14.Qb3 Be6 15.Be2 Kh7 16.g3 (16.Ba3 Nd7+-) 16...Rf7 (16...dc4 17.Nc4 Nd5 18.0-0+/-) 17.h4 (17.c5 Nd7+/-) 17...Ng8 (17...dc4 18.Bc4 Bc4 19.Qc4+/-) 18.c5 White prepares b6 18...Nf6 19.b6 Na6 20.0-0-0 (20.h5!?+/-) 20...Nd7 21.Qc2 Nb4 22.Qb3 Na6 23.Qc2 Qf8 (23...Nb4 24.Qb1=) 24.Rdg1 Ndc5 25.dc5 Nb4 26.Qb3 Qc5 27.Ndb1 (27.Kd1+=) 27...d4 (27...Qb6 28.Kd1 c5-/+) 28.Qe6+- dc3 29.Ba3?? (29.Bc3 Nd5 30.Qf7 Nc3 31.Bh5-+) 29...c2-+ 30.Qb3 Ra4!! (30...cb1R 31.Kb1 Qc3 32.Qc3 Bc3 33.h5-/+; 30...cb1Q 31.Kb1 Qc3 32.Qc3 Bc3 33.h5-/+; 30...cb1B 31.Kb1 Qc3 32.Qc3 Bc3 33.h5-/+; 30...cb1N 31.Kb1 Qc3 32.Qb4 Qb4 33.Bb4 Ra4 34.Bd2-+) 31.Qa4 (31.Nd2 Ra3! 32.Qa3 Nd3 33.Qd3 ed3 34.Bd3 Qa3 35.Kc2 Rd7 36.Nb3 Qb2 37.Kd1 Bc3 38.h5 Rd3 39.Nd2 Qd2) 31...Na2 32.Kd2 Rd7 (32...cb1Q 33.Rb1 Qc3 34.Kd1 Rd7 35.Bd6 Rd6 36.Bd3 Qd3 37.Ke1 Bc3) 33.Ke1 (33.Qd4 cb1Q 34.Bc5 Qb2 35.Ke1 Bd4 36.ed4-+) 33...cb1Q 34.Bd1 (34.Qd1 Rd1 35.Bd1 Qc4 36.Bb2 Qbd3 37.Bg7 Qb4 38.Bc3 Qbc3) 34...Rd1! 35.Qd1 (35.Qd1 Qcc2 Mate attack) 35...Bc3 (35...Qcc2 36.Kf1 Qbd1 37.Kg2 Qf3 38.Kh3 Qcf2 39.h5 Qh5) 36.Ke2 Qc4 (36...Qc4 37.Qd3 Qcd3; 36...Qcb5 37.Qd3 Q5d3) 0-1. Timmermans,Mark (2385) - Abdurakhmonov,Mukhammadali (2245), Titled Tuesday, 2021.

4.Bb2 d6 5.c4 g6 6.e3 Bg7 7.Nf3 Ne7 8.Be2 0-0 9.0-0 c6 (9...e4 10.Nd4+=) 10.d4+= e4 11.Nfd2 d5 12.Nc3 Be6 (12...Qa5 13.Qc1+=) 13.Qc2 (13.cd5 cd5 14.Na4 Nf5+/-) 13...Qd7 (13...dc4 14.bc6 (14.Qe4?! cb5 15.Qf3 Qd7=+) 14...Nbc6 15.Na4+/-) 14.Rac1 (14.Na4 Qe8+-) 14...Nf5 (14...Bg4 15.Bg4 Qg4 16.Na4+/-) 15.Na4+- Ra4? (better 15...Qd8+-) 16.Qa4 Nd6 17.bc6 bc6 (17...Nc6 18.Qd1+-) 18.cd5 Bd5 19.h3 Qe6 20.Qa7 (20.Qc2!? Nd7+-) 20...Nd7 21.a4 (21.Bc3 Nb5 22.Qa5 Rb8+-) 21...Nf6? (better 21...c5 22.Bb5 Nb5 23.ab5 Rc8+-) 22.Ba3 Rd8 23.a5 (23.Qc7 Rd7 24.Qb8 Bf8+-) 23...Nb5 24.Qb6 Re8 (24...Qe8 25.Bb5 cb5 26.Bd6+-) 25.Bb5 cb5 26.Qb5 Nh5 (26...Ra8 27.Rc7+-) 27.a6 (27.Qb6 Qf5+-) 27...f5 (27...Ra8 28.Nc4 Bc6 29.Qa5+-) 28.Rc5 f4 (28...Nf6+-) 29.Rd5 1-0. ClayPigeons (2165) - Tayaro (2155), Rated Bullet game, lichess.org, 2019.

4.c4 d5 5.e3 d4 6.Nf3 f6 (6...de3!? 7.de3 Qd1 8.Kd1 e4=+) 7.Bd3 Bg4 (7...Bc5 8.Qc2=) 8.Qc2 (8.ed4 Bc5 9.Bh7 Bd4 10.Bg6 Kf8=) 8...Ne7 (8...Bf3!? 9.gf3 g6=) 9.Bh7+= f5 10.Ne5 (10.Ng5!? d3 11.Qc3+=) 10...Rh7=+ 11.Ng4 (11.Bb2 d3 12.Nd3 Bh5=) 11...d3-/+ 12.Nf6 (12.Qd1!? fg4 13.Qg4=+) 12...gf6 13.Qc3 Kf7 (13...f4!?-/+) 14.Bb2 Ng6 15.Qd4 (15.c5 Ne5 16.f4 Qd5-/+) 15...Qd4 16.Bd4 Nd7 17.Nc3 Bc5 18.0-0 (18.Bc5!? Nc5 19.Rb1-+) 18...Bd4 19.ed4 Nf4 (19...Rh4 20.Rac1-+) 20.Rfe1 (better 20.g3 Ne6 21.d5-+) 20...Re8 (20...Rah8 21.g3 Ne6 22.Re6 Ke6 23.Re1 Kf7 24.Nd5-+) 21.g3 (21.Re8 Ke8 22.Re1 Re7 23.Re7 Ke7 24.Na4 Ne2 25.Kf1 Nd4-/+) 21...Re1 (21...Ne2!? 22.Ne2 de2 23.d3-+) 22.Re1-/+ Ne6 23.d5 (23.Re6 Ke6 24.Na4 f4-+) 23...Nd4 (better 23...Nec5-+) 24.Na4?? (better 24.Kg2-+) 24...Nf3 25.Kf1 Ne1 (25...Rh2!? 26.Re3 Nde5 27.Rf3 Nf3 28.Nb2 Nd2 29.Ke1 Nf3 30.Kf1-+) 26.Ke1 Ne5 (26...Rh2!? 27.f4-+) 27.h4 f4 28.c5 1-0. zembelek (2015) - zuriko (1955), Rated Blitz game, lichess.org, 2014.

4.c4 f5 5.e3 Nf6 6.Bb2 d6 7.Nc3 Be7 8.Na4 Nbd7 9.Be2 0-0 10.d3 c6 11.Nc3 Nc5 Black plans e4 12.Nf3 e4 13.Nd4 Qd7 14.0-0 ed3 15.Bd3 Nd3 16.Qd3 d5 (16...Ng4 17.Rfb1+/-) 17.cd5+- Nd5 (17...cd5 18.Rfd1+-) 18.a4 (better 18.bc6!? bc6 19.Nc6 Qc6 20.Nd5 Qb7+-) 18...Nc3 19.Bc3 (19.bc6 bc6 20.Qc3 Bf6+-) 19...Kh8 (19...c5 20.Qc4 Rf7 21.Nf3+/-) 20.Rfd1 White prepares a5 20...c5 21.Nf3 Qe6 (21...Qd3 22.Rd3 c4 23.Rd2+-) 22.a5+- Bf6 (22...Kg8!?+-) 23.Bf6 Qf6 24.Qd6 Qd6 25.Rd6 f4 26.e4 (26.ef4 Kg8+-) 26...Bg4 (26...Re8 27.Nd2+-) 27.a6 ba6 28.ba6 Bf3 29.gf3 Rfc8 30.Kf1 c4 31.Ke1 Kg8 32.Rd7 White intends a7 32...Kf8 (32...c3 33.a7+-) 33.a7 c3 34.Kd1 h5 (34...h6 35.Kc2+-) 35.Kc2 g6 36.Rb1 Ke8 (36...Re8+-) 37.Rbb7 Rc6 (37...Kf8 38.Rh7 Kg8 39.Rbg7 Kf8 40.Rc7 Rc7 41.Rc7+-) 38.Rg7 (38.Rh7 Rc7 39.Rbc7 Kd8 40.Rcg7 Ra7 41.Rh8) 38...Rd8 (38...Kf8 39.Rbf7 Ke8+-) 39.Rg8 1-0. petrobbo (2030) - MIKSINGH (2185), ChessWorld.net, 2018.

4.c4 Nf6 5.Nc3 Bc5 6.Na4 d6 7.Nc5 dc5 8.Bb2 b6 (8...Nbd7 9.d3+=) 9.e3 (9.Be5 Nbd7 10.Bb2 0-0+-) 9...Qe7 10.Nf3 0-0 (10...Nbd7!?+/-) 11.Ne5 Re8 12.Nf3 Bg4 13.Be2 Ne4 14.0-0 Bf3 15.Bf3 (15.gf3?! Nd6+-) 15...Ng5?? (15...Ra7 16.d3 Nf6 17.d4+-) 16.Be2 (better 16.Ba8 Rd8 17.Bd5+-) 16...Nd7 17.Bf3 Nf3?? (17...Nb8 18.Ba8 Nd7+-) 18.Qf3+- Nf6 (18...Ne5 19.Qe4+-) 19.Bf6 Qf6 20.Qf6 gf6 21.a4 Red8 22.Rfd1 Rd3 23.f4 Rb3 24.Ra2 (24.d4 cd4 25.ed4 Rb4+-) 24...Rb4 25.Rda1 Rc4 26.Kf2 f5 27.Ke2 f6 (27...Ra5 28.d3 Rb4 29.Kd2+-) 28.h3 (28.a5 ba5 29.Ra5 Ra5 30.Ra5 Rb4+-) 28...Kf7 (28...Ra5 29.d3 Rb4 30.Ra3+-) 29.a5 ba5 30.Ra5 Ra5 31.Ra5 Rb4 32.Ra7 Rb5 33.Rc7 Kg6 34.Kd3 h5 35.g3 Kh6 (35...Rb1 36.Rc8+-) 36.h4 Kg6 37.Rc6 Ra5 38.Kc4 Ra4 (better 38...Ra2 39.Kc3 Ra1+-) 39.Kc5 Ra2 40.Rd6 (better 40.Kd6+-) 40...Rd2?? (40...Rc2 41.Kb6 Rc1+-) 41.Rd2 Kf7 42.Rd5 Ke7 43.Rf5 Ke6 44.Rh5 f5 45.Kd4 (45.Rg5 Kf6 46.h5 Ke7 47.h6 Ke8 48.h7 Ke7 49.Rg7 Ke6 50.h8Q Kf6 51.Qh6) 45...Kd7 If Black now would get Rg5 in, he might survive 46.Rf5 Kd6 47.Re5 Kc6 If Black now only could play f5... 48.h5 (48.h5 Kb7 49.Kc5 Kc7 50.h6 Kd7 51.h7 Kc7 52.h8Q Kd7 53.Qe8 Kc7 54.Re7) 1-0. Jimito100 (2010) - Dandorf (1950), Rated Bullet game, lichess.org, 2020.

4.d4 ed4 5.Qd4 c5 6.Qe5 Qe7 7.Qc7 Qd8 8.Qd8 Kd8 9.e4 Bd6 10.Nf3 f6 11.Bc4 h6 12.Bd2 Ne7 13.Nc3 Bc7 14.0-0-0 d6 15.Bf4 Kd7 16.b6 g5 17.bc7 gf4 18.cb8Q Rb8 19.Nb5 1–0. marekt – arkady08, internet, 2001.

4.e4 Nf6 5.f3 Nh5 (better 5...Bc5 6.Nc3 0-0-/+) 6.d4?? (better 6.Ne2=) 6...Qh4-+ 7.Ke2 Ng3! 8.hg3 Qh1 9.Nh3 d6 10.Be3 Bh3 (10...Qh2 11.Bf2-+) 11.gh3 Qh2 12.Bf2 Be7 13.Nd2 (13.Nc3 0-0-/+) 13...0-0 14.Qe1 (14.f4 Rd8-+) 14...f5 (14...ed4 15.Kd3 c5 16.bc6 Nc6 17.Rb1-+) 15.Kd3 (better 15.ef5!? Nd7 16.Kd1-/+) 15...fe4 16.Ne4 (16.Ke4 ed4 17.Bc4 Kh8-+) 16...d5 (16...Rf3!? 17.Ke2 Rf5 18.d5-+) 17.Nd2 e4! 18.Ke2 (18.fe4 Rf2 Pinning (18...Rf2 Deflection)) 18...Nd7 (18...Bg5!? 19.f4 e3 20.Nf3 ef2 21.Qf2 Qf2 22.Kf2-+) 19.f4 Rae8 20.Ke3? (20.Kd1-+) 20...g5 21.Bg1 (21.f5 g4 22.Kf4-+) 21...gf4 (21...Qg1 22.Qf2 gf4 23.gf4 Qf2 24.Kf2 Rf4 25.Kg1-+) 22.gf4 Qg1 23.Ke2 (23.Qf2 Qf2 24.Kf2 Rf4 25.Kg1 Bf6-+) 23...Rf4 24.Bg2 Qg2 (24...Qg2 25.Kd1 Bh4 26.Qh4 Rh4-+) 0-1. bvamrx (1995) - Hectoranse19 (2035), lichess.org, 2021.

4.Bb2 d6 5.c4 Bb7 6.Nf3 a4 7.e3 Ne7 8.Nc3 f5 9.Na4 Ng6 10.Nc3 Be7 11.d3 0-0 12.Be2 Nd7 13.0-0 Nc5 14.d4 Ne4 15.de5 de5 16.Nd5 Bd6 17.Qc2 Ne7 (17...Qe8+=) 18.Ne7 (better 18.Ne5 Nd5 19.cd5 Bd5 20.Bc4 Be5 21.Rad1 Bh2 22.Kh2 Qh4 23.Kg1+-) 18...Qe7= 19.a4 Ng5 20.Ng5 Qg5 21.f3? (better 21.g3 f4 22.h4=) 21...f4?? (21...Qe3 22.Kh1 e4 23.Bc1=+) 22.e4?? (22.a5 e4 23.a6 ef3 24.Bf3 Bf3 25.Rf3 Bc5+-) 22...h5 (better 22...Bc5 23.Kh1 Rf6=+) 23.Rad1 Rf6 0-1. GM_HUSARZ (2120) - NimzoBros (2100), Rated Bullet game, lichess.org, 2016.

4.Bb2 d6 5.e3 Bb7 6.Nf3 Nd7 7.c4 Qe7 8.Be2 0-0-0 9.0-0 Kb8 10.d4 ed4 11.ed4 Ngf6 12.Nc3 White intends d5 12...g6 13.d5 Bg7 14.Nd4 Nc5 15.Re1 Qd7? (better 15...Rhe8!? 16.Na4 Nfe4 17.Nc5 Nc5+=) 16.Nc6+- Bc6 17.bc6 Qc8 18.Na4 Rhg8 19.Nc5 dc5 20.Rb1 Ka7 21.Qd2 (better 21.Bd3!?+-) 21...Ne4+/- 22.Qc2 Bb2 23.Rb2 Nd6 24.Bd3 Rde8 25.Reb1 Qa6 26.Qc3 Re7 27.Re2 Re2 28.Be2 Re8 29.Bd3 h5 30.f3 Qc8 31.Re1 Re1 32.Qe1 Qe8 (better 32...Qh8!? 33.Bf1 Qd4 34.Kh1 Qf6=+) 33.Qe8= Ne8 34.Kf2 Nd6 35.a4 Kb8 36.h4 Kc8 37.g4 Kd8 38.gh5 gh5 39.Kg3 Ke7 40.Kf4 Kf6 41.Kg3 Ke5 42.Kf2 Kd4 43.Be2 Nf5 (43...Nc4?? 44.Bc4 Ke5 45.Ke3+-) 44.f4 Ke4 (44...Nh4?? A) 45.Bh5 Nf5=+ (45...Kc4?? 46.Bf7 Kb4 47.d6 cd6 48.c7+-); B) 45.d6 cd6 46.c7+-) 45.Bh5 Kf4 (45...Nh4?? 46.d6 cd6 47.c7 Kf4 48.c8Q+-) 46.Bf7 Ke5?? (46...Nd6!? 47.Bg6 Nc4=) 47.h5?? (47.Bg6 Nd6 48.Bd3+-) 47...Kf6?? (better 47...Nd6 48.Bg6 Nc4+=) 48.Bg6+- Nd6 49.Bd3 Kg5 (49...Nf7 50.Ke3 Ke5 51.Bg6+-) 50.Be2 (better 50.Ke3 Nf7+-) 50...Kf5 51.Ke3 Kg5 52.Kf2 (better 52.Bd3!? Nf7+-) 52...Kf5 53.h6?? (better 53.Kf3 Kg5 54.Bd3+-) 53...Kg6= 54.Kg3 Kh6 55.Kf4 Kg6 56.Ke5 Kf7 57.Bd3 Ke7 58.Be2 Nf7 59.Kf5 Kd6 60.Kf6 Ne5 61.Kf5 Nf7 62.Kf6 Ne5 63.Kf5 Nf7 ½-½. B4_My_Life (2210) - durduakkok (2105), Rated Classical game, lichess.org, 2016.

4.e3 Bb7 5.Bb2 d6 6.Nf3 Nd7 7.d4 e4 8.Nfd2 Ngf6 9.Be2 (9.c4 h6+=) 9...d5 10.c4 g6 (10...dc4 11.Bc4 Bd6 12.Qc2+=) 11.Nc3+- Bg7 12.0-0 0-0 (12...dc4 13.f3 Bh6 14.Nc4+-) 13.cd5+- Bd5 (13...Nd5 14.Nde4 Rc8 15.Bf3+-) 14.Nd5 Nd5 15.Ne4 c5 (better 15...N7f6 16.Nf6 Qf6+-) 16.bc6 Nb8 17.Rc1 Qc7 18.Qb3 Rd8 19.Nc3 Qc6 (19...Nc3 20.Qc3 Rd6+-) 20.Bf3 (20.Nd5 Qe6 21.Bc4 Ra7+-) 20...Nc3 (20...a4 21.Qd5 (21.Bd5?! ab3 22.Bc6 Nc6+-) 21...Rd5 22.Bd5+-) 21.Rc3 a4 (21...Qe8 22.Ba8 Nd7 23.Bb7+-) 22.Qc2 (22.Qc2 Qc3 23.Qc3+-; better 22.Bc6!? ab3 23.Ba8 Nd7+-) 1–0. Pierre – Ondveel, internet, 2019.

4.e3 Nf6 5.Bb2 d6 6.Nf3 Be6 7.d4 ed4 8.Nd4 Qd7 9.Qf3 Bd5 10.Qe2 Be7 11.c4 Be4 (better 11...Bb7!?=) 12.Nc3+/- Bg6 13.Qd2 0-0 14.Bd3 Bd8 15.0-0 Re8 16.Bg6 hg6 17.Qd1 Qe7 18.Qf3 Nbd7?? (better 18...Ne4+/-) 19.Qa8+- Nc5 20.Qc6 Nb3 (20...Nd3 21.Qf3+-) 21.Rab1 (better 21.Nb3 Qd7 22.Qb7+-) 21...Nd2 22.Rbd1 Nf1 23.Rf1 Nd7 (23...Nd7 24.Nd5 Qf8 25.Qd7 f5+-). POLSKA_HUSARIA (2060) - Rookie_8 (2040), Rated Bullet game, lichess.org, 2015.

4.Bb2 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 a5 4.b5 Bc5).

4.Bb2 Nf6 5.e3 d6 6.d4 ed4 7.ed4 A) 7...Ba7 8.Bd3 0-0 9.Ne2 Re8 10.0-0=; B) 7...Qe7 8.Be2 Bb6 9.Nf3 0-0 10.0-0=; C) 7...Bb6 8.Bd3 0-0 9.Ne2 d5 10.0-0=.

4.Bb2 Nf6 5.e3 d6 6.d4 ed4 7.Bd4 Bd4 8.Qd4 0-0 (8...Qe7 9.Bd3 Nbd7 10.Nf3=) 9.Nf3 Nbd7 (9...Re8 10.Bd3=) 10.Bd3 Nc5 11.Nbd2 Re8 12.0-0 b6 13.Nb3 Bb7 14.Nc5 dc5 15.Qh4 Bf3 16.gf3 Qd5 17.Qf4 Qd6 18.Qh4 Rad8 19.Rad1 Qe5 20.Bh7! Kf8 (20...Nh7 21.Rd8) 21.Be4 g5 22.Qh6 Ke7 23.Rd8 Rd8 ½–½. Blasius,Stefan (1715) – Packroff,Hermann (2250), GER Cup Amateur GrAB 1st, 2000.

4.Bb2 Nf6 5.e3 d6 6.d4 ed4 7.Bd4 A) 7...Bg4 8.Be2 Bd4 9.Qd4 Be2 10.Ne2=; B) 7...0-0 8.Bc5 dc5 9.Qd8 Rd8 10.Nc3=; C) 7...Qe7 8.c3 Bd4 9.cd4 0-0 10.Bd3=; D) 7...Nbd7 8.c3 0-0 9.Nf3 Qe7 10.Bd3=.

4.Bb2 Qh4 5.e3 d6 6.d4 ed4 7.Bd4 Bd4 8.ed4 Bg4 9.Nf3 Qe7 10.Be2 Bf3 11.gf3 Nf6 12.Nc3 a4 13.Qd3 d5 14.0-0-0? (better is 14.Qf5 Qd7 15.Qe5 Kd8 16.Rg1+=) 14...Qa3–+ 15.Kd2 0-0 16.Ra1 Qb4 17.Rhb1 Qd6 18.Na4 Qh2 19.Rh1 Qf2 20.Raf1 Qg3 21.Nc5 Qf4 22.Kc3? (better is 22.Qe3 Qe3 23.Ke3–+) 22...b6 23.Nb3 Re8 24.Qd2 Re3 25.Bd3 c5 26.dc5 (26.bc6 Nc6 27.Qh2–+) 26...bc5 (better is 26...Ra2 27.Rh4 d4 (27...Qh4?! 28.Qe3 bc5 29.Qc5–/+) 28.Nd4 Qh4–+) 27.Nc5 (27.Kb2 c4 28.Bh7 Nh7 29.c3 cb3 30.Ra1 Ra2 31.Ra2 ba2 32.Re1–+) 27...Qc4 28.Kb2 Qa2 29.Kc1 Qa1 0–1. Workman,K – Wilson,Vester, Detroit op, 1990. (=1.a3 e5 2.b4 a5 3.b5 Bc5)

4.e3 d6 5.Bb2 c6 6.d4 ed4 7.ed4 Bb6 8.Nd2 Nf6 9.Ngf3 0-0 10.Be2 Bf5 11.0-0 Re8 12.c4 Ne4 13.Ne4 Be4 (worse 13...Re4 14.Bd3 Rf4 15.Re1 Bd3 16.Qd3+/-) 14.Bd3 Nd7 15.Re1 Nf6 16.Rc1 Qd7 17.h3 cb5 18.cb5 Rac8 19.Be4 Ne4 20.Qd3 d5 21.Ne5? (21.a4 Rc1 22.Rc1 g6=+) 21...Qf5 (21...Re5 22.Rc8 Qc8 23.Rc1-+) 22.f3? (better 22.Qf3 Qf3 23.Nf3-/+) 22...Rc1-+ 23.Rc1 (worse 23.Bc1 Qe5 24.fe4 Bd4 (24...Qd4?! 25.Qd4 Bd4 26.Kf1 Re4 27.Bd2-+) 25.Kh1 de4-+) 23...Qe5 24.fe4 de4 25.Qc4 h6 26.Kh1 Qf4 (26...Qg3!? 27.Kg1-+) 27.Rf1 Qc7 28.Qd5?? (better 28.Qc7 Bc7 29.g4-+) 28...e3-+ 29.Qf3 e2 30.Re1 Qc2 31.Ba1 Qd2 32.Qf2 (32.Bc3 Qe3 33.Qe3 Re3 34.Bd2 Ra3 35.Re2 Bd4 36.Re4-+) 32...f5! 33.a4 (33.Qf5 Qe1 Double attack (33...Qe1 Deflection)) 33...Re4 (33...Bc7 34.d5 Bd6-+) 34.Kh2 (34.Kg1 Bd8 35.Qg3-+) 34...Bd4 (34...Bc7 35.Kg1 Bd6-+) 35.Bd4-/+ Qd4 36.Re2?? (better 36.Qd4 Rd4 37.Re2-/+) 36…Qe5-+ (36...Qe5 37.Qg3 Re2 38.Qe5 Re5-+) 0-1. cipiripi (2415) - pacalmisu (2440), Rated Blitz game, lichess.org, 2016.

4.e3 d6 5.Bb2 Nf6 6.Nf3 0-0 7.d4 ed4 8.Bd4 Nbd7 9.Be2 Ne4 10.0-0 Re8 11.Nc3 Nc3 12.Bc3 Nf6 13.Bd4 Ne4 14.c3 Bg4 15.Re1 Qe7 16.Qc2 Bh5 (16...d5 17.Bd3 Bf3 18.gf3=) 17.Nd2= Bg6 18.Ne4 Be4 19.Bd3 d5 20.a4 Bd6 21.Be4 de4 22.c4 b6 23.Rac1 Ba3 24.Rcd1 Rad8 25.Ba1 Bb4 26.Rd8 Rd8 (worse is 26...Be1 27.Re8 Qe8 28.c5 bc5 29.Qc5+/–; 26...Qd8?! 27.Rd1 Qe7 28.Rd5=) 27.Rd1 Rd6 28.g3 h5 29.Kg2 h4 30.Rd6 Bd6 31.Qb2 Qg5 32.Qe2 hg3 33.hg3 Qg6 34.Bd4 Qf5 35.Qd1 Qe6 (35...Kh7 36.Qc2+=) 36.Qe2 Qg6 37.Bb2 (37.c5!? bc5 38.Bc3=) 37...Qf5+= 38.Bd4 Kf8 (38...Kh7 39.Qd1+=) 39.Qd1 (better is 39.Qd2 Qf3 40.Kg1=) 39...Qg6 (better is 39...f6+=) 40.c5+/– bc5 (40...Bc5?? 41.Bc5 Ke8 42.Bd4+-) 41.Bc5 Ke7 42.Qc2 f5 (42...Bc5!? 43.Qc5 Kd7 44.Qd5 Ke7+/–) 43.Bd6+- Qd6 ½–½. Logvinov,Kirill (2010) – Denisov,Sergei (2190), FIDE Open, 2013.

4.e3 d6 5.Bb2 Nf6 6.Nf3 0-0 7.d4 ed4 8.Nd4 Re8 9.Nd2 Bg4 10.Be2 Be2 11.Qe2 Nbd7 12.N2f3 Ne5 13.0-0 Bd4 14.Nd4 Qd7 15.c4 d5 (15...c5 16.Nb3=) 16.cd5+= Qd5 17.Rfd1 Qc4 18.Rac1 Qe2 19.Ne2 c6 (19...Rac8 20.Bc3+/-) 20.Nd4 (20.Be5 Re5 21.bc6 bc6 22.Rc6 Rb8+/-) 20...cb5 (20...Rad8!?+/-) 21.Nb5+- Nc6? (21...Rab8 22.Nd6 Re6 23.Be5 Re5 24.Rb1+/-) 22.Nd6 (better 22.Bf6 gf6 23.Nc7+-) 22...Reb8 23.Bf6 gf6 24.Nb7! Rb7 25.Rc6 Kg7 26.Rc3 a4 27.g3 (27.Kf1 Rb3 28.Rcd3 Rc8+-) 27...Rb3+/- 28.Rdd3 Rab8 29.Kg2 (better 29.e4!?+/-) 29...Rc3= 30.Rc3 Rb3 31.Rc7 Ra3 32.Ra7 Ra2 (32...f5 33.Ra5=) 33.Kf3 f5 34.Kg2 a3 35.Kf3 Kf6 36.Kg2 Kg6 37.Kf3 h6 38.Kg2 h5 39.Kf3 Kf6 40.h4 Kg6 41.Ra5 Kf6 42.Kg2 Kg6 43.Kf3 Kg7 (43...f6 44.Ra7=) 44.Kg2 (44.Rf5!? Kg6 45.Rg5 Kh6 46.Ra5+/-) 44...Kg6 45.Kf3 ½-½. FeegLood (2780) - toivok (2780), lichess.org, 2017.

4.e3 d6 5.d4= ed4 6.ed4 Ba7 (6...Bb6 7.Nf3+= Nf6 8.Bd3=) 7.Nf3+= Bg4 (7...Nf6 8.Be2+=) 8.Be2 Nf6 9.0-0 0-0 10.h3 Bf5 (10...Bh5 11.Nc3+=) 11.Nc3+/– Re8 (11...Nbd7 12.Bd3 Bd3 13.Qd3+/–) 12.Bd3 Bd3 13.Qd3 Nbd7 14.Bf4 (14.Bd2 Nf8+=) 14...Nf8+= 15.Rfe1 (15.Bg5 Ne6 16.Bh4+=) 15...Ng6 (15...Ne6!? 16.Bg3 Qd7+=) 16.Bg5+/– h6? (better is 16...Re1!? 17.Re1 d5+/–) 17.Re8+- (17...Qe8 18.Bf6 gf6 19.Nd5+-) 1–0. Luzuriaga,Norberto Horacio – Longmore,David, Tigerschachclub, 2001.

4.e3 Ne7 5.Bb2 d6 6.c4 Bf5 7.Nc3 Nd7 8.Nf3 0-0 9.d3 c6 10.d4 ed4 11.Nd4 Bg6 12.Be2 Re8 13.0-0 Nf8 14.Na4 Ba7 15.Bf3 Rc8 16.Qd2 c5 17.Nb3+/– b6 18.Qc3 f6 19.Rfd1 Qc7 20.e4 Rcd8 21.g3 Nd7 22.Bg2 Bh5 23.Re1 Ne5 24.f4 Nd7 25.Qe3 Bf7 26.Nd2 d5+= 27.e5?? d4–/+ 28.Qd3 fe5 29.fe5 Ne5–+ 30.Qf1 Ng4 31.Be4 Bg6 32.Bg6 Ng6 33.Re8 Re8 34.Re1 Ne3 35.Qd3 Qb7 36.Qe2 Rf8 37.Nf1 Re8 38.Bc1?? Qf7?? 39.Ne3 de3 40.Be3 Ne5–/+ 41.Bf4 Nf3!–+ 42.Qf3 Re1 43.Kf2 Re8 44.Qd5–/+ Qd5 45.cd5 Rd8 46.Bc7 Rd5–+ 47.Bb6 Bb6 48.Nb6 Rd4 49.Nc8 Kf7 50.b6 Rd2 51.Kg1? Rb2 52.b7 Ke6 53.Na7 Rb7 54.Nc6 Rb1 55.Kg2 a4 56.Na5 Kd5 57.Kf3 c4 58.Ke3 Rb5 (59.Kd2 Ra5–+) 0–1. Buck,K1 (1805) – Morgner,S (1920), 10th TCh–Euro sen, 2008.

4.Nf3 d6 5.Nc3 Nf6 6.d3 0-0 7.h3 h6 8.Bb2 Nbd7 9.Na4 Ba7 10.e4 Re8 11.c4 Nf8 12.Nc3 Ng6 13.g3 Nh5 (13...Be6 14.d4+=) 14.Nd2= Qf6 (14...Qg5!? 15.Nf3 Qe7=) 15.Qe2 c6 16.a4 (better is 16.Qh5 Qf2 17.Kd1 Qg3 18.Qf3+/–) 16...Nhf4?? (better is 16...Qg5=) 17.gf4+- Nf4 18.Qf3 Re6 19.Qg3 Qe7 20.Nb3 Rg6 21.Qh2 Qh4 22.Nd1 (22.Na5? Ng2 23.Kd2 Qf2 24.Ne2 Be3 25.Kc3 Ra5–+) 22...Be6 (22...cb5!? 23.cb5 Bb6+/–) 23.Na5+- Bb6 (23...cb5 24.ab5 (worse is 24.Nb7 Bc8+-) 24...Bc5 25.Bc3+- (25.Nb7?! Bb4 26.Nc3 Ra1 27.Ba1 Qe7=)) 24.Nb7 cb5 25.c5 dc5 26.Be5 Nd5 27.ab5 Ra1 28.Ba1 Nb4 29.Bb2 c4 30.Qb8 Kh7 31.Qd6 cd3 32.Qb4 Bg4 33.e5 d2 34.Kd2 Bf2 35.Qf4 Be1 36.Kc1 f5 37.ef6 Qh5 38.f7 Bb4 39.Bd3 Bc8 40.Rg1 Qd5 1–0. Fournier,Frederic (2595) – Gnero (2415), Active (5/0), 2004.

5.e3 Qe7 6.Nf3 Nf6 7.d4 ed4 8.Nd4 0-0 9.Nc3 Nbd7 10.Nf5 Qe6 11.Nd4 Qe7 12.Nb3 (12.Be2 Ne5=) 12...Bb6 (12...a4 13.Nc5 Nc5 14.Bd3=) 13.Na4 Ba7 14.Bd3 Ne5 15.0-0 Nfg4 (15...Re8 16.Be2=) 16.h3 Nf2 (16...Nf6 17.Qd2+=) 17.Rf2= Be3 18.Bd4 (18.Qe2 Bf2 19.Qf2 Nd3 20.cd3 Qg5=+) 18...Bf2=+ 19.Bf2 Qg5 20.Qc1 Nf3 (20...Qc1 21.Rc1 Be6 22.Be4=+) 21.Kh1 Qh5 (better is 21...Qc1!? 22.Rc1 Ne5=) 22.gf3+= Bh3 23.Nd4 Bg4 24.Kg1 Bf3 25.Nf3 Qg4 26.Kh2 Qf3 27.Qe3 Qg4 (27...Qh5 28.Qh3 Qh3 29.Kh3+/–) 28.Qh3 Qf4 29.Bg3 Qd2 30.Kh1 f5 31.Rf1 Qe3 32.Bf5+= g6? 33.Bf4 Qd4 34.Qd3 Qd3 35.Bd3 g5 36.Bg5 Rf1 37.Bf1 b6 38.Nc3 Re8 39.Nd5 Re1 40.Kg2 Ra1 41.Bd8 Ra3 42.Bc7 Ra4 43.Nb6 Rg4 44.Kf3 Rg5 45.Bc4 Kh8 46.Nd7 Rf5 47.Ke4 Rf2 48.Bd6 (48...Kg7 49.c3+-) 1–0. Modesto (2660) – Tinker (2345), ICC, 2002.

5.e3 Ne7 6.Nf3 Bg4 (6...Bb6 7.Be2=) 7.Be2 (7.d4 ed4 8.ed4 Bb6=) 7...Bb6 8.0-0 Bh5 9.Nc3 0-0 10.Ng5 Bg6 11.f4 ef4 12.Rf4 f6?? (better 12...Nf5 13.Nh3 d5+=) 13.Ne6+- Qe8 14.Nf8 Qf8 15.Bc4 Bf7 16.Bf7 Qf7 17.Qf3 Ra7 18.Ne4 Nd7 19.Rf1 (19.Qh3 f5+-) 19...Ng6 20.Rf5 (20.Ng5 Qa2 21.Ra1 fg5 22.Rf8 Ndf8 23.Ra2 Nf4+-) 20...Nde5? (better 20...Nh4 21.Qg4 Nf5 22.Qf5 Nf8+/-) 21.Qh3+- Ra8? (21...Ne7 22.Nf6! gf6 23.Rf6 Be3 24.Qe3+-) 22.Be5 (better 22.Ng5 fg5 23.Rf7 Nf7 24.Qf3+-) 22...de5?? (22...Ne5 23.Qg3 Qg6+-) 23.Ng5! fg5 (23...Nh4 24.Nf7 Nf5 25.Ne5+-) 24.Rf7 Nf4 25.R7f4! ef4 (25...ef4 26.Qf5 Decoy; 25...gf4 26.Qe6 Double attack) 26.Qe6 Kh8 27.Kh1 1-0. FeegLood (2685) - EricRosen (2505), lichess.org, 2018.

5.e3 Nf6 6.a4 0-0 (6...e4 7.d3 0-0 8.de4 Ne4 9.Nf3 Re8 10.Bd3 Bg4=) 7.d4 (7.Nf3 Bb6 (7...e4 8.Nd4 Nbd7 9.Be2 Re8 10.0-0 Ne5=; 7...Bg4 8.Be2 Re8 9.0-0 Nbd7 10.d4 Bb6=) 8.Be2 e4 9.Nd4 d5 10.0-0 c5=; 7.Be2 e4 8.d4 Bb6 9.c4 Bf5 10.Nc3 Re8=+) 7...ed4 8.ed4 Bb6 9.Nf3 (9.Bd3 Re8 10.Ne2 Nd5=) 9...Bg4 (9...Nd5 10.Be2 Nf4=+) 10.Be2 Nbd7 (10...Bf3 11.Bf3 Re8 12.Be2=) 11.0-0= Re8 12.h3 Bh5 13.Nbd2 (13.Re1 Nd5=) 13...Nd5=+ 14.Nc4 (14.g3 Bg6=+) 14...Nf4–/+ 15.Ne3 Ne2 (15...Qf6 16.Re1–/+) 16.Qe2=+ d5 17.g4 (17.Rfe1 Qe7=+) 17...Bg6–/+ 18.Qd2 (18.Rfe1 Rc8–/+) 18...c6 19.Ne5 Ne5 20.de5 Qh4 21.Kh2 Bc7 (better is 21...Qh6!?–/+) 22.f4=+ Be4 23.c4 Rad8 24.Qf2? Qe7 25.Bd4 g5 26.fg5?? Be5 27.Be5–/+ Qe5 28.Qf4 d4 29.Qe5=+ Re5 30.Nf5 Bf5 31.Rf5 Re2 32.Kg3 d3 33.Rd1 d2 34.Rff1 Re4 35.Rf2 Rc4 36.Rfd2 Rd2 37.Rd2 Ra4 38.bc6 bc6 39.Rc2 Ra1 40.Rc6 a4 41.Ra6 a3 42.Kh4 a2 43.Kh5?? Rh1–+ (44.Kh4 a1Q 45.Ra1 Ra1–+) 0–1. blackcrowman – babyl, ChessWorld.net, 2008.

5.e3 Nf6 6.d4 ed4 7.ed4 Bb6 8.Bd3 0-0 9.c4 Bg4 10.Ne2 Re8=.

5.e3 Nf6 6.d4 ed4 7.ed4 Bb6 8.Bd3 0-0 9.Ne2 d5 10.0-0 Bg4 11.f3 (11.Re1 Re8=) 11...Bh5 (11...Be6 12.Re1=) 12.Nf4 (12.Nd2 Bg6 13.Bg6 fg6=) 12...Bg6 (12...Qd6 13.Qd2=) 13.Ng6+= hg6 (13...fg6 14.c4+=) 14.Nd2 (14.Re1 Qd6+=) 14...Nbd7 (14...Nh5 15.g3+=) 15.f4 Re8 (15...Qe7 16.Re1 Qd6 17.Qf3+=) 16.Qf3 16.c4 Ne4 17.Rb1 a4+=) 16...Nf8 (16...Qe7 17.c4+=) 17.f5 (17.Rae1 Re1 18.Re1 Ne6+=) 17...g5 (17...gf5 18.Bf5 Qe7 19.c4+=) 18.Rae1 Qd6 19.Qg3 (19.Qh3 N8d7+=) 19...Qg3= 20.hg3 Nh5 (20...c5 21.bc6 bc6 22.Nf3=) 21.Kf2 c6 22.Nf3+= Bc7 23.Ne5 f6 24.Be2 Ng3= 25.Kg3 fe5 26.Bh5 e4 27.Kg4=+ Re7 28.bc6 bc6 29.f6 gf6–/+ 30.Rf6 Nh7 31.Rg6 Kh8 32.Bc1 Rf8 33.Bg5 Ng5 34.Kg5 Bf4 35.Kh4 Rh7 36.Rc6= Bd2 37.Re2 e3 38.Kg5 Rg7 39.Bg6 Rf2 40.Rc8 Rg8 41.Rg8 Kg8 42.Bd3 Rf1 43.Kg6 Rf4= 44.c3 Bc3 45.Re3 Bd4 46.Re8 Rf8 47.Re6 Rb8 48.a4 Rb6 49.Bf5 Kf8 50.Kh7 Rb7 51.Kh6 Rb6 52.Kh7 Rb7 53.Kh6 Rb6 (53...Bc3 54.Rc6 d4 55.g4=) ½–½. Poley,Vladimir (2395) – Johansson,Viktoria (2215), Stockholm Sweden Salongernas IM, 2005.

5.e3 Nf6 6.d4 ed4 7.ed4 Bb6 8.Nf3 0-0 9.Be2 Re8 10.0-0 Bf5 11.c4 Nbd7 (11...Ne4 12.Re1=) 12.Nc3 Nf8 13.Qd2 Ng6 14.Rfe1 Qd7 15.Bf1 (15.Rad1 a4+=) 15...h6 (15...Bg4 16.Ng5=) 16.Na4+= Ne4 17.Qd1 (17.Qc2+=) 17...Bg4 (17...Ba7!?=) 18.Nb6 (18.h3 Bf5+=) 18...cb6+= 19.h3 Bh5 20.Re3 (20.d5 f5+=) 20...Nh4 21.Be2 Nf5 22.Rd3 Ng5 23.Ne5 de5 24.Bh5 e4 25.Rd2 e3 26.Re2 ef2 27.Rf2 Ne3 28.Qc1 Qc7 29.Re2 Nc4 30.Rc2 Qg3 31.Rc4 Nh3 32.Kh1 Qh4 33.gh3 Qh3 34.Kg1 Qh5 35.Rc2 Rac8 36.Rc8 Qg4 (36...Qg4 37.Kh1 Rc8–+) 0–1. Cottarelli,Franco (2140) – Herzog,Klaus (2020), corr WS/M/121 ICCF, 2007.

5.Bb2 d4 6.Nf3 Qf6 7.ed4 ed4 8.Qe2 Be6 9.Qe5 (9.d3!?+=) 9...Qe5= 10.Ne5 Nd7 (10...Ne7 11.Nf3 Nf5 12.Bd3=) 11.Nf3 0-0-0 12.Bd4 Ngf6 13.Be2 Rhe8 (13...Bf5 14.d3=) 14.Bc5 (14.Nc3 Bf5=) 14...Nc5 15.0-0 Bg4 16.Bd1 Re7 (16...Ne6 17.c3+=) 17.Nc3 Bf3 18.Bf3 Rd2 19.Rac1 g5 20.h3 h5 21.g3 h4 22.gh4 gh4 23.Rfd1 Red7 24.Rd2 Rd2 25.Bg2 (25.Be2 Nce4 26.Ne4 Ne4+=) 25...a4 (25...Ne6 26.Kf1+=) 26.Nb1 (26.Kf1 Rd4=) 26...Re2 (26...Rd4!?+=) 27.Nc3= Rd2 28.Nb1 Rd6 (28...Rd4 29.Re1+=) 29.Nc3= Rd4 30.Nb1 (30.Re1 Rc4 31.Re3 Kd7=) 30...Nfd7 31.c3 Rd6 32.c4 (32.Re1 Nf6+=) 32...f5 (32...Ne5!?–/+) 33.Nc3 Rd4 34.Nd5 Kd8 35.Nb4 (35.Ne3 f4 36.Nf5 Rd3+=) 35...Ne5 (35...Ne4+=) 36.Rc3? (36.Re1!? Nc4 37.Bb7=) 36...Rd1 (36...Rc4 37.Re3 Rc1 38.Kh2–+) 37.Kh2–/+ b6 38.Bd5 Kd7 39.Re3 Kd6 40.Kg2 (40.Re2 f4–/+) 40...Rc1 0–1. Zhukov,Vladimir (1930) – Zerzhalova,Svetlana (1940), Memorial E. Sinitsin, 2010.

5.Bb2 Bd6 6.d4 (6.Nf3 Nd7 7.c4 Ngf6 8.cd5=; 6.c4 Nf6 7.d4 e4 8.Nc3=; 6.Be2 Nf6 7.Nf3 Qe7 8.0-0=+; 6.Nc3 Nf6 7.Nf3 0-0 8.Be2=+; 6.d3 Nf6 7.Nf3 Qe7 8.Be2=+) 6...e4 7.c4 Nf6 8.Nc3=.

5.Bb2 Nd7 6.d4 (6.c4 Ngf6 7.d4 ed4 8.Bd4=; 6.Nf3 Bd6 7.c4 Ngf6 8.cd5=; 6.Be2 Bd6 7.Nf3 Ngf6 8.0-0=+; 6.Qf3 Ne7 7.Qg3 Ng6 8.h4=+; 6.Qh5 Bd6 7.Nf3 Ngf6 8.Qg5=+) 6...ed4 7.Nf3 Ne7 8.Nd4=.

5.Bb2 Qe7 6.Nf3 (6.c4 Nf6 7.cd5 Nd5 8.d4=; 6.d4 ed4 7.Bd4 Bd4 8.Qd4=; 6.Be2 Bd6 7.Nf3 Nf6 8.0-0=+; 6.Qf3 e4 7.Qg3 f6 8.Ne2=; 6.Ra2 Nf6 7.Nf3 Bd6 8.Be2=+) 6...Bd6 7.c4 Nf6 8.d4=.

5.Bb2 f6 6.Be2 (6.Nc3 Ne7 7.d4 ed4 8.ed4=; 6.Nf3 Bg4 7.Be2 Bd6 8.0-0=; 6.d4 ed4 7.ed4 Bd6 8.Bd3=; 6.c4 d4 7.ed4 Bd4 8.Bd4=; 6.Qh5 g6 7.Qd1 Bf5 8.Nf3=) 6...Ne7 7.d4 ed4 8.Bd4=.

5.c4 Nf6 6.cd5 Nd5 7.Bb2 Qe7 8.Nf3 f6 9.Bc4 Be6 10.Qb3 a4 11.Qc2 Nd7 12.Bd5 Bd5 13.Nc3 Bb3 14.Qe4 0-0-0 15.0-0 Nb6 16.Rfc1 g6 17.d4 ed4 18.Qe7 Be7 19.Nd4 Nc4 (19...Rhe8 20.Rab1+=) 20.Nb3?? (better is 20.Na4 Nb2 21.Nb2+/–) 20...ab3+= (worse is 20...Nb2 21.Rc2 ab3 22.Rb2+=) 21.Na4 Nb2 22.Nb2 Rd2 23.Rcb1? (better is 23.b6 c6 24.Nc4=) 23...Rhd8 24.a4 (24.b6–+) 24...Rc2 25.Nd1 Rdd2?? (better is 25...f5 26.Rb3 Bf6–+) 26.Rb3= Re2 27.g3 Re1 28.Kg2 Bd6 29.Rab1 Be5 30.Kh3 f5 31.b6 c6 32.Kg2 Kd7?? 33.Rd3= Ke6 34.h4 h6 35.Kf3 Ra2 36.Rb4 g5 37.hg5 hg5 38.g4 f4 39.ef4 Bf4 40.Nc3 Ra3 41.Re4 Re4–/+ 42.Ke4 Be5 43.Ne2 Ra4 44.Nd4 Kd6 45.Ke3 Bd4 46.Rd4+= Rd4 47.Kd4 c5 48.Ke4 Kc6? 49.f4+- gf4 50.Kf4 c4 51.g5 c3 52.Ke3 c2 53.Kd2 1–0. combijack (1805) – nicolso (1735), gameknot.com, 2013.

5.d4 ed4 6.ed4 Qf6 7.Be3 Ne7 8.c4=.

5.d4 Bd6 6.Bb2 e4 7.c4 Nf6 8.Nc3=.

5.d4 Bd6 6.c4 Nf6 7.c5 Be7 8.de5=.

5.d4 Bd6 6.de5 Be5 7.Ra2 Nf6 8.Nf3=.

5.d4 Bd6 6.Nf3 =+.

5.Be2 A) 5...Bd6 6.Nc3 Nf6 7.Nf3 e4 8.Nd4=+; B) 5...Nf6 6.Nf3 Bd6 7.Bb2 e4 8.Nd4=;C) 5...e4 6.d4 Bd6 7.c4 Qg5 8.g3=+.

5.Nf3 A) 5...Bd6 6.c4 e4 7.Nd4 Nf6 8.cd5=; B) 5...Bg4 6.h3 Bf3 7.Qf3 e4 8.Qg4=; C) 5...Nd7 6.c4 dc4 7.Bb2 Bd6 8.Bc4=; D) 5...Qf6 6.d4 e4 7.Nfd2 Bd6 8.c4+=; E) 5...e4 6.d4 Be7 7.Nfd2 Nf6 8.c4=.

5.Bb2 d5 6.Nf3 (6.c4 Nf6 7.cd5 Nd5 8.d4=; 6.d4 ed4 7.Bd4 Bd4 8.Qd4=; 6.Be2 Bd6 7.Nf3 Nf6 8.0-0=+; 6.Qf3 e4 7.Qg3 f6 8.Ne2=; 6.Ne2 Nf6 7.d4 ed4 8.Nd4=) 6...Bd6 7.c4 Nf6 8.d4=.

5.Bb2 d6 6.Be2 (6.Nf3 Nf6 7.Be2 Bb6 8.d4=; 6.Nc3 Nf6 7.Nge2 0-0 8.d4=; 6.Qe2 Nf6 7.d4 Bb6 8.Nd2=; 6.c3 Nf6 7.d4 Bb6 8.Nf3=+; 6.Ne2 Nf6 7.d4 ed4 8.Nd4=) 6...Nf6 7.d4 Bb6 8.Nf3=.

5.Bb2 Nf6 6.Be2 d5 7.d4 ed4 8.ed4=.

5.Bb2 Nf6 6.Ne2 d5 7.Be5 Qe5 8.d4=.

5.Bb2 Nf6 6.Be5 Qe5 7.d4 Bd4 8.Qd4=.

5.Bb2 Nf6 6.Nf3 d6 7.d4 ed4 8.Nd4 0-0 9.Be2 Nbd7=+ 10.Nd2 (10.Nc3 Ne5=+) 10...Ne5 11.h3 b6 (11...Bd7 12.0-0=) 12.0-0= Bb7 (12...Bd7 13.c4=) 13.N2b3=+ Rae8 (13...Bd5 14.Nc5 dc5 15.Nf3 Bf3 16.Bf3=+) 14.Nf5= Qe6 15.Nbd4 (15.Nfd4 Qd7=) 15...Qd7 (15...Qd5 16.f3=) 16.c4 g6 (16...d5 17.cd5 Bd5 18.Qa4=) 17.Nh6 Kg7 18.Ng4 Nfg4 19.hg4 f6 20.Nb3 (20.f4 Nf7 21.g5 Kg8 (worse 21...fg5 22.Bg4 Qe7 23.Nf5 Kg8 24.Ne7 Re7 25.Bd4+-; 21...Re3?! 22.gf6 Kg8 23.Kh2=+) 22.gf6 Re3=+) 20...Kg8 (20...Qe6 21.g5 Kg8 (21...fg5? 22.Nc5 bc5 23.f4+-) 22.gf6 Nc4= (22...Qf6 23.Nc5 Bg2 24.Be5 Re5 25.Kg2 bc5 26.f4 Re3 27.Qd2+-)) 21.Nc5= dc5 22.Qd7 Nd7 23.Rad1 (23.Rfd1 Ne5=) 23...Ne5 24.f3 (24.Rd2 Bc8=) 24...Bc8 25.Kf2 (25.Be5 fe5 26.Rd5 Kg7=) 25...Be6 26.Be5 fe5 27.Kg3 Rd8 ½–½. Domingo,Jordi (1965) – Nunez,Antonio (1855), FICGS, 2011.

5.Bb2 Nf6 6.Nf3 e4 7.d4 Bb6 8.Nfd2=.

5.Bb2 Nh6 6.Nf3 (6.Nc3 0-0 7.Nd5 Qd6 8.Bc4=; 6.Bc4 0-0 7.Ne2 Rd8 8.Nbc3=; 6.Ne2 0-0 7.Nbc3 d6 8.Nd5=; 6.Be2 0-0 7.Nc3 Nf5 8.Nd5=; 6.Qf3 d6 7.Nc3 0-0 8.Na4=) 6...d6 7.Nc3 0-0 8.Be2=.

5.c3 A) 5...Bb6 6.Qg4 g6 7.d4 Nf6 8.Qd1=; B) 5...d6 6.d4 Bb6 7.Nf3 e4 8.Nfd2=; C) 5...d5 6.d4 ed4 7.cd4 Bd6 8.Bd3=; D) 5...Nf6 6.d4 Bd6 7.Bc4 e4 8.Nh3=.

5.Nf3 A) 5...d6 6.Bb2 Nf6 7.Be2 Bb6 8.d4=; B) 5...d5 6.Bb2 Bd6 7.c4 Nf6 8.d4=; C) 5...Nf6 6.Ne5 Qe5 7.d4 Bd4 8.Qd4=; D) 5...Nh6 6.d3 0-0 7.Nc3 Nf5 8.Be2=; E) 5...e4 6.d4 ef3 7.dc5 fg2 8.Bg2=.

5.Qg4 A) 5...Qf6 6.Nc3 Nh6 7.Qe4 0-0 8.Nd5+/–; B) 5...f6 6.Ne2 Nh6 7.Qa4 d6 8.d4+=; C) 5...g6 6.Nf3 Nf6 7.Qh4 d6 8.Be2=.

5.Bb2 e4 6.d3 (6.Bf6 Qf6 7.Nc3 Qf5 8.Nge2=; 6.c4 0-0 7.d4 Be7 8.Nc3=; 6.d4 Be7 7.d5 d6 8.Nc3=) 6...0-0 7.de4 Ne4 8.Qg4 =.

5.c4 0-0 6.d4 ed4 7.ed4=.

5.c4 d5 6.cd5 Nd5 7.Nf3 Bg4 (7...e4 8.Qc2 Qe7 9.d4=+) 8.Qc2= Bf3 9.gf3 Bd6 (9...Nd7 10.Rg1 0-0 11.Bb2=) 10.Bb2 (10.Qe4 c6+=) 10...0-0 (10...Nd7 11.h4+=) 11.h4 (11.Qe4 Nb6 12.Qb7 N8d7+-) 11...Nd7 12.h5 h6 13.Nc3 N7f6 (13...Nc3 14.Bc3 Nf6 15.Bc4+=) 14.Nd5+- Nd5 15.Bc4 Nb6 16.Bd3 Qg5 (16...Rb8 17.Ke2+-) 17.Ke2 Nd7 (17...Qe7 18.Rhg1 Qd7 19.Rac1+-) 18.Rag1+- Qe7 19.Rg2 Nf6 20.Rhg1 Nh5?? (better 20...Ba3 21.Rg7 Kh8+-) 21.Rh1 1–0. Ddgs – Museida, internet, 2019.

5.c4 d6 6.Bb2 0-0 7.Nf3 =+.

5.c4 d6 6.Bb2 Qe7 7.Nc3 (7.Ne2 0-0=+) 7...Nbd7 (7...0-0 8.Nf3=+) 8.Qc2 (8.Na4 0-0=+) 8...0-0 (8...Nb6 9.Be2=+) 9.h3 (9.Nf3 e4 10.Nd4 Nb6=+) 9...Re8 (9...Nb6 10.Nf3=+) 10.Nf3 Nf8 (10...Nb6 11.Be2 e4 12.Nd4=+) 11.Be2 Ng6 (11...Ne6 12.0-0=) 12.Na4 (12.d4 Bb6 13.Na4 Ba7=) 12...Ba7 (12...e4 13.Nd4=) 13.d4 (13.0-0 e4 14.Nd4 Nh4=) 13...ed4 (13...e4 14.Nd2=) 14.Nd4 Ne4 (14...Ne5 15.0-0=) 15.Bf3 (15.Bd3 Qh4 16.0-0 Bd7=) 15...f5 (15...Bd7 16.0-0=) 16.0-0-0 (16.0-0 Nh4=) 16...Qf7 (16...Nh4 17.Bh5 g6 18.Bf3=+) 17.Be4 (17.Nc3 Qc4 18.Ne4 Qc2 19.Kc2 fe4=+) 17...fe4=+ 18.b6 Bb8 19.Nb5 (19.Nc3 Qc4 20.Ncb5 Qc2 21.Nc2 cb6 22.Nd6 Bd6 23.Rd6 Rf8=+) 19...Be6 (19...Bd7 20.bc7 Bc7 21.Nac3=) 20.Rd4= c6 (20...Ne5!? 21.Qe4 Nc6 22.bc7 Nd4 (< 22...Bc7 23.Nd6 Bd6 24.Rd6+=) 23.Qd4 Bc7 24.Qg7 Qg7 25.Bg7 Rec8=+ (25...Kg7? 26.Nc7 Rac8 27.Ne8 Re8 28.Nb6+-)) 21.Nd6+= Bd6 22.Rd6 Bc4 23.Nc5 Bd5 24.Rd7 Re7= 25.Re7 Qe7 26.Rd1 Nh4 27.Qc3 Nf5 28.Qe5?? Qc5–+ 29.Kb1 Qf8 30.g4 Nd6 31.Qg3 Nc4 (32.f3 ef3–+) 0–1. Campos Calvo Sotelo,Javier (2115) – Kozarcanin,Sead (2230), It (open) (seniors), 2005.

5.c4 d6 6.Qc2 Qe7 7.Nc3 Nbd7 8.Nf3 0-0 9.Be2 Re8 10.Bb2 h6 11.0-0-0 (11.d4!? Bb6 12.0-0+=) 11...e4 12.Nd4 Nb6 13.Na4 Na4 14.Qa4 b6 15.h3 Nd7 (better is 15...Bd4 16.Bd4 Bb7=) 16.Nf5+- Qg5 17.Ng7 Re7 18.h4 Qg6 (18...Qg2?? 19.Rhg1 Qg1 20.Rg1+-) 19.Bh5 (better is 19.Nh5!? Ne5 20.Nf4+-) 19...Qh7+/– (19...Qg2?? 20.Rhg1 Qg1 21.Rg1+-) 20.g4 (better is 20.Rh3!?+/–) 20...Ne5= 21.Nf5 Nd3 22.Kb1 Bf5 23.gf5 Nb2 24.Rdg1 Kf8 25.Kb2 Qf5 26.Qd1 Re5 27.f4 ef3 28.Bf3 Rae8 29.Bd5 (29.Bc6 Qd3 30.Be8 Qa3 31.Kc2 Qa2 32.Kc3=) 29...Be3?? (29...Qd3 30.Rh2 Qa3 31.Kb1 Rd5 32.cd5+=) 30.Rf1?? (30.de3 Re3 31.Rf1 Qe5 32.Kb1 Re7+-) 30...Bd4?? (better is 30...Bf2+=) 31.Ka2+- Bf2 (31...Rd5?? 32.Rf5 (worse is 32.cd5 Qd3 33.Rf3 Qb5–/+) 32...Rf5 33.Qg4+-) 32.Rf2! Qf2 33.Rf1 Re1? (33...Re2 34.Rf2 Rf2+-) 34.Rf2 Rd1 35.Rf7 Kg8 36.Rf1 Kg7 37.Rd1 Re2 38.Rg1 Kh8 39.Rg2 Re5 40.Kb3 Kh7 41.Kc3 Kh8 42.Rg8 Kh7 43.Rg3 Kh8 44.Rg6 Rh5 (44...Kh7 45.Rf6 Re7 46.h5+-) 45.Rg8 Kh7 46.Rc8 Rh4 47.Rc7 Kg6 48.Rc6 1–0. combijack (1905) – rocksham (1735), gameknot.com, 2013.

5.c4 d6 6.d4 ed4 7.ed4 Bb6=.

5.c4 Qe7 6.Bb2 d6 7.Nf3 e4 (7...Nbd7 8.Be2+=) 8.Nd4 (8.d4 ef3 9.dc5 fg2 10.Bg2 dc5=) 8...Bd4 (8...0-0 9.Nc3=) 9.Bd4= Nbd7 10.Be2 Ne5 11.0-0 Bf5 (11...Bg4 12.Bg4 Nfg4 13.Be5 Ne5 14.Nc3=) 12.Nc3+= 0-0 13.Nd5 (13.f4 ef3 14.Bf3 A) 14...Nc4?? 15.Be2 Ne3 16.de3+- (16.Be3?! Qe6+-); B) worse is 14...Nf3 15.Qf3 Bc8 16.b6+-; C) 14...Bd3 15.Bb7 Bf1 16.Qf1 Rab8+=) 13...Nd5= 14.cd5 Rfc8 15.Rc1 Nd7 (15...Qg5 16.Kh1=) 16.f4 (16.d3 Ne5 17.de4 Be4+-) 16...f6= 17.Bg4 Bg4 18.Qg4 Nc5 19.Bc5 (19.Rc3 Qf7 20.Bc5 f5+=) 19...dc5 20.Qe6 Qe6 21.de6 b6 22.f5 (22.Rc4 f5–/+) 22...Rd8 23.Rf2 Rd3 24.a4 Rad8 25.Rc4 Rd2 (25...Kf8 26.h3+=) 26.Re4= Rd1 27.Rf1 R1d5 28.g4 (28.Rf3 Rd2=) 28...h6 (28...Re8 29.h4=) 29.Kg2 Re8 30.h4 Kf8 31.Kg3 Ke7 32.Kf4 Rh8 33.Rc1 Rd3 34.Rec4 Rhd8 35.Rg1 Rh8 (35...Rd1 36.Rc1 R1d2 37.g5 fg5 38.hg5+=) 36.Rg3 (36.Rcc1 Rd6=) 36...Rb3 37.e4 Rb4 38.Rgc3 Rd8 39.Kf3 (39.g5!?=) 39...Rd1 40.Ke2 Rd6 (40...Rbb1 41.h5–/+) 41.Kf3 (41.Rc2 Ke8=) 41...Rd1 42.Ke2 Rd6 43.Kf3 ½–½. Campos Calvo Sotelo,Juan (2050) – Ridameya Tatche,JM (1995), 7th Championship de Espana de Ve, 2009.

5.d4 ed4 6.ed4 Qe7 7.Be2 Bb6=.

5.d4 ed4 6.ed4 Be7 7.Bd3 0-0=+ 8.Nf3 b6 (8...Re8 9.0-0=) 9.0-0 Bb7 (9...Re8 10.Re1=) 10.Re1+= h6 (10...Re8 11.c4+=) 11.c4 c6 (11...Re8 12.Nc3+=) 12.Nc3 Re8 13.Bf4 Nh5 (13...d5 14.Ne5+=) 14.Be3+/– cb5 15.Nb5 d5 (15...Nf6 16.Rb1+/–) 16.cd5 (16.Ne5!? Nf6 17.Qf3+/–) 16...Bd5+= 17.Ne5 Nf6 18.Nc3 Bd6 (18...Bc6 19.Qb3 (19.Nc6?! Nc6 20.d5 Na7+/–) 19...Bd5 20.Nd5 Qd5 21.Bc4+- (21.Qb6?! Nbd7 22.Qb5 Ne5 23.de5 Rab8 24.Qd5 Nd5+/–)) 19.Nd5+/– Nd5 20.Nf7 Kf7? (20...Bh2 21.Kh2 Qh4 22.Kg1 Re3 23.Re3 Ne3+-) 21.Qh5 (21.Qf3 Bf4 22.Bc4 Kg6 23.Bd5 Be3 24.Be4 Re4 25.Qe4 Kf7 26.Qa8 Bf4+-) 21...Kf8 22.Bh6 (22.Qd5?? Bh2 23.Kh2 Qd5–+) 22...gh6?? (better is 22...Re1 23.Re1 Ra7+=) 23.Qh6 Kg8 24.Bh7 Kf7 (24...Kh8 25.Be4 Kg8 26.Bd5 Re6 27.Be6) 25.Qg6 Kf8 26.Qg8 1–0. Luzuriaga,Norberto Horacio – McCarthy,Mike, Orang–Utan Invitational, 2001.

5.d4 ed4 6.ed4 Be7 (6...Ba7 7.Nf3 0-0 8.Be2 Ne4 9.Bb2 d5 10.Nc3 Be6) 7.Bd3 d5 8.Nf3 c5 9.dc5 (9.Nc3 c4 10.Be2 0-0) 9...Bc5 10.0-0 0-0 (10...Be6+=) 11.Nc3 Be6 12.Na4 Bd6 13.Re1 Nbd7 14.Bb2 Re8 15.h3 h6 16.Qd2 Nh5 17.Rad1 Bf4 18.Qc3 Bd6 19.Qd4 Rc8 20.c4 Nhf6 21.Bf1 b6 22.Bd3 Bf8 23.cd5 Bd5 24.Re8 Qe8 25.Re1 (worse 25.Nb6 Bc5 26.Re1 Be6–+ (worse 26...Bd4 27.Re8 Re8 28.Bd4–/+)) 25...Qd8 26.Qe3 Nc5 27.Nc5 Bc5 (worse 27...Rc5 28.Bd4+-) 28.Qf4 Bf3 29.Qf3 Bd4 30.Bc1 Qd5 31.Qd5 Nd5 32.Be4 Nc3 33.Bc6 Rd8 34.g3 Bc5 35.Kg2 Nd1 36.Re2 Nc3 37.Rc2 ½–½. Luzuriaga,Norberto Horacio (2095) – Hnatovsky,Nicholas (2310), CP–2010–P–00025, 2010.

5.d4 ed4 6.ed4 Be7 7.Nf3 0-0 8.Bd3 d5 (8...Re8 9.0-0=) 9.Nbd2 (9.0-0 Re8=) 9...c5 (9...Re8 10.0-0=) 10.dc5 Bc5 11.0-0 Bg4 (11...Re8 12.Nb3 Bd6 13.Nbd4+=) 12.Bb2 (12.h3 Bh5+=) 12...Nbd7 (12...Re8 13.h3 Bh5 14.Re1+=) 13.Rc1 (13.h3 Bh5+=) 13...Rc8 (13...Re8 14.h3 Bh5 15.c4=) 14.c4 Nb6 15.h3 Bd7 16.Ng5 Nc4? 17.Nc4 dc4 18.Bc4 Be6?? 19.Ne6+- fe6 20.Be6 Kh8 21.Qd8 Rfd8 22.Bc8 Rc8 23.Bd4 b6 24.Bc5 bc5 25.Rc4 Kg8 26.b6 (26...Nd7 27.Rb1+-) 1–0. Steffens,Olaf (2320) – Krueger,Wolfgang, Schleswig Holstein–ch masters, 1997.

6.c4 Qe7 7.Nc3 Nbd7 8.Be2 0-0 9.Qc2 Re8 10.Nf3 h6 11.h4 e4 12.Nd4 Nf8 13.0-0-0 Bd4 14.ed4 Bf5 15.f3 Bg6 16.d3 ed3 17.Bd3 Qe3 18.Kb1 Bd3 19.Qd3 Qf2 20.Qd2 White prepares d5 20...Qg3 21.h5 Nh5 22.Ka1 (22.Rh5 Qg6 Double attack (22...Qg6 Decoy)) 22...Qg6 23.Rh4 Nf6 24.d5 N8d7 25.Ka2 Nc5 26.Rdh1 Kh7 (better is 26...Nd3!?–/+) 27.g4= Re5 (27...Nfd7 28.g5 Ne5 29.gh6 Nf3 30.hg7 Kg7 31.Rh7 Kf8 32.Qf4+-) 28.Ne2 Re2 (better is 28...Ree8!?+=) 29.Qe2+/– Re8 30.Qd2 Ng8 31.g5 Qd3 32.Qd3 Nd3 33.Re4 Re4 34.fe4 Nb2 35.Kb2 Kg6 36.gh6 Nh6 37.Kc3 f6 38.Kd4 (better is 38.b6!? cb6 39.Rb1+-) 38...b6+/– 39.Rg1 Kf7 40.Ke3 Ng8 41.Rh1 Ne7 42.Rh8 Ng8 43.Kf4 Kf8 44.Kf5 Kf7 45.Rh7?? (better is 45.Kg4+-) 45...Nh6–+ 46.Kf4 Kg8 47.Rh6 gh6 48.Kg4 Kg7 49.Kh5 a4 50.Kh4 Kg6 51.Kg4 h5 52.Kf4 h4?? (52...Kg7 53.Kf3 Kh6–+) 53.Kg4+= f5 54.ef5?? (better is 54.Kh4 fe4 55.Kg4=) 54...Kf6–+ 55.Kh4 Kf5 56.Kh5 Ke4 57.Kg6 Kd4 58.Kf6 Kc4 59.Ke6 Kb5 60.Kd7 Kc5 61.Kc7 b5 62.Kb7 Kd5 63.Kb6 Kc4 (63...Kc4 64.Ka5 d5–+) 0–1. combijack (1810) – rocksham (1835), gameknot.com, 2009.

6.d4 ed4 7.ed4 Bb6 8.Bd3=.

6.Be2 Bb6 7.Nf3 e4 8.Nd4=.

6.Ne2 0-0 7.d4 ed4 8.Nd4=.

6.Nf3 e4 7.Nd4 0-0 8.Be2=.

6.c4 0-0 7.Nf3 d6 8.Be2 Nbd7 9.0-0 e4 10.Nd4 Ne5 11.Nb3 Bb6 12.d4 ed3 13.Bd3 Be6 14.Qc2 Nd3 15.Qd3 Nd7 16.N1d2 a4 17.Nd4 Ne5 18.Qc2 Bd7 19.Rac1 Qh4 20.N4f3 Nf3 21.Nf3 Qh5 22.Rfd1 f6 23.Qe4 Rab8 24.Rd5 Qf7 25.Qh4 Bc5 26.Rh5 h6 27.h3 c6 28.g4 cb5 29.cb5 Bb5 30.Nd4 Bd4 31.Bd4 Bc6 32.Bb6 Qe6 33.Qg3 Rbc8 34.Rd1? Qb3–+ 35.Qd6 Qb6 36.Qe6 Kh8 37.Qf5 Rcd8 38.Rb1 Qc7 39.Rc1 Qe7 40.Rc5 Rd1 41.Kh2 Rh1 42.Kg3 Rg1 (43.Kh2 Rg2 44.Kh1 Rf2 45.Rc6 Rf5 46.Rf5 bc6–+) 0–1. Wilk,Adam (2035) – Pinkas,Karol (2370), Katowice op, 1995.

6.d4 ed4 7.Bd4 0-0 8.Nf3 d5 9.Be2 Bf5 10.0-0 Nbd7 11.Bb2 Rad8 12.Nbd2 a4 13.c4 Nb6 14.Qc1 Rfe8 15.Re1 dc4 16.Nc4 Ne4 17.Bd4 Be6 18.Nb6 cb6 19.Bd3 (19.Qb2 f5+=) 19...Bb3 20.Be4 Qe4 21.Bc5 Rc8 (worse is 21...bc5 22.Qc5 Rd3 23.Rac1+=) 22.Nd2 Qe6 23.Nb3 ab3 24.Qb2 bc5 25.Rec1 c4 26.Rab1 h6 27.g3 (27.Rc3 Qd5 28.a4 Ra8+=) 27...Red8 28.Rc3 Ra8 29.Rbc1 Ra4 30.Qe2 Qd5 31.e4 (31.b6 Qe6–/+) 31...Qd2 (31...Qb5 32.Qb2–+) 32.Kf1? (32.Qf1 Rd4 33.e5 Re4–+) 32...b2 (better is 32...Ra3 33.Qd2 Rd2–+) 33.Qd2+= Rd2 34.Rb1 Rd3 35.Rd3 cd3 36.Rb2 Ra3 37.Ke1 Ra4 38.Kd2 Re4 39.Kd3 Re6 40.f4 Kf8 41.Kd4 Ke7 42.Kd5 Kd7 43.h4 Re3 44.Rg2 Rd3 45.Kc4 Re3 46.Kd4 Ra3 47.Kc5 Kc7 48.b6 Kd7 49.Kb4 Rd3 50.Rc2 Rg3 51.Rc7 Kd6 52.Rb7 Kc6 53.Rf7 Kb6 54.Kc4 Kc6 55.Kd4 Kd6 56.Ke4 Ke6 57.Ra7 Kf6 58.Ra6 Kf7 59.h5 ½–½. Fournier,Frederic (1860) – Lemoine,Gilles (2150), FRA Cup (Team) 1T Senlis–ParisEchiquier, 2004.

6.d4 ed4 7.Bd4 Bd4 8.Qd4 d6 =+.

6.Be2 0-0 7.Nf3 e4 8.Nd4=.

6.Ne2 d5 7.d4 Bd6 8.de5=.

6.Be5 Qe5 7.d4 Bd4 8.Qd4=.

6.Nf3 e4 7.d4 Bb6 8.Nfd2=.

6.Bb2 e4 7.Bc4 0-0 8.Ne2=.

6.c4 0-0 7.c5 Be7 8.de5=.

6.Bc4 0-0 7.Bb2 e4 8.Ne2=.

6.Nd2 ed4 7.ed4 0-0 8.Bd3=.

6.Be2 0-0 7.Bb2 e4 8.Nh3=.

6.Nf3 e4 7.Nfd2 b6 8.Bc4=.

4.Bb2 f6 5.e3 cb5 (5...d5 6.d4 ed4 7.Bd4=) 6.Bb5+= Nc6 7.a4 Qb6 8.Ne2 Na7 9.Nbc3 Bb4 10.Nd5 Qd8 11.c4 Ne7 12.Nb4 ab4 13.0-0 Nac6 (13...Nb5!? 14.cb5 d5+=) 14.d4+/- 0-0 15.d5 Na7 16.d6 Nec6 17.Qd5 Kh8 18.f4 ef4 19.Nf4 Qb6?? (better 19...Qe8+/-) 20.c5 (20.Ng6 hg6 21.Rf3 Qe3 22.Re3 Rf7 23.Qf7 Nb5 24.Rh3) 20...Qd8 (20...Nb5 21.Rf3 g5 22.Ng6 Kg7 23.Nf8 Nc3 24.Bc3 bc3 25.Qe4 Qd8 26.Qh7 Kf8 27.Raf1 f5 28.Rf5 Qf6 29.Rf6 Ke8 30.Rf8) 21.Qh5 (21.Ng6! hg6 22.Rf3 Rf7 23.Qf7 Qg8 24.Rh3 Qh7 25.Qf8) 21...Qe8+- 22.Qh3 (better 22.Qe8 Re8 23.Nd5+-) 22...b6?? (better 22...Nb5 23.ab5 Ra1 24.Ra1 Ne5+-) 23.Bd3 (23.cb6?! Nb5 24.ab5 Ra1 25.Ra1 Nd8+/-) 23...h6 24.Ng6 (24.Qf5!? Qe3 25.Rf2 Qd3 26.Qd3 Bb7 27.Ng6 Kg8 28.Nf8 Rf8+-) 24...Kg8 25.Bc4 Kh7 26.Qf5 (better 26.Nf8 Qf8 27.Rf6 Qf6 28.Bf6 Ne5 29.Qf5 Kh8 30.Be5 Bb7 31.Qf7 bc5 32.Qg7) 26...Qg6+= 27.Qf2?? (better 27.cb6 Qf5 28.Rf5+=) 27...Kh8?? (27...bc5 28.Rad1 f5 29.Rd5-+) 28.Rad1?? (better 28.cb6 Na5 29.Bd5-/+) 28...bc5-+ 29.Bd3 Qe8 (better 29...Qg5-+) 30.Qf5-/+ g6 (30...Qe3 31.Kh1 Qd3 32.Qd3+/-) 31.Qh3 (better 31.Qc5!? Kh7 32.Rf4-+) 31...Kg7 32.Rf3?! (32.Qg3 Bb7 33.Rc1-+) 32...Ne5 33.Rg3 (33.Be5 Qe5 (33...fe5?! 34.Rf8 Qf8 35.Bg6-/+) 34.Qg3 Qg3 35.Rg3 g5-+) 33...Nd3 34.Rd3 Qe4 35.Rd2 Bb7 (35...c4 36.Qg4 Qg4 37.Rg4-+) 36.Rf2 (36.Qd7 Rf7 37.Qg4-+) 36...Qb1 37.Rf1 Qb2 38.Qh5 (38.Qd7 Rf7 39.Qf5 g5-+) 38...Be4 39.Qg4 (39.Qc5 Rfc8 40.Qd4 Qd4 41.ed4 Nc6-+) 39...Qc2 (better 39...Qe5 40.Qd7 Rf7 41.Qg4-+) 40.Qf4 (40.Qd7 Rf7 41.Qe6 b3-+) 40...f5 (40...b3 41.Rg4 Rae8 42.Qf2-+) 41.Qf2 (41.Rf2 Qc3 42.h4 b3-+) 41...Rf6 42.Qc2 Bc2 43.e4 Be4 44.Re3 Raf8 (better 44...Nc6 45.Rc1-+) 45.Re4 fe4 46.Re1 Rf2 47.h3 Rf1! 48.Rf1 Rf1 49.Kf1 b3 50.Ke2 b2 51.Ke3 b1Q 52.Kf4 Qb2 (52...Qb2 53.Ke4 c4 54.g4 c3 55.Kf3 c2 56.g5 Qa3 57.Kf2 c1Q 58.gh6 Qh6 59.Kf1 Qd2 60.a5 Qac1) 0-1. black_bishop_88 (2520) - psm_ajedrez (2505), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.b5 c6)

4.c4 cb5 5.cb5 a4 6.Bb2 d6 7.e3 Bd7 8.Nc3 Nf6 9.Na4 Be7 10.Nf3 0-0 11.Be2 Nd5 12.0-0 f5? (12...Be6!?+=) 13.Nc3 (better 13.Qb3!? Be6 14.Bc4 Ra4 15.Bd5 Bd5 16.Qd5 Rf7 17.Qb7 Nd7+-) 13...Nc3 14.Bc3 (14.dc3?! Be6+=) 14...Be8 15.Bc4 Kh8 16.a4 Nd7 17.Re1 Nb6 18.Bb3 Bh5 19.Qb1 Bf3 20.gf3 Bh4 21.Rf1 Qg5 22.Kh1 Rf6 23.Rg1 Qh5 24.Qd1 Bf2? (better 24...Nd7 25.Rg2 Qe8+-) 25.Rg2 Bh4 26.a5 Nd7 27.f4 (better 27.Bd5!? Re8+-) 27...Qe8 28.fe5 Ne5 29.Qe2 Rh6 (29...Rg6 30.a6 ba6 31.Bd5+-) 30.a6 ba6 31.ba6 Ng4? (better 31...Bf6 32.Bd5 Ra7+-) 32.Rg4 (32.e4 Ne5 33.Bd5+-) 32...fg4+/- 33.Qg4 Qc6?? (better 33...Ra7!?+=) 34.Qg2 (34.e4 Bf6 35.Bd5 Qe8 36.Ba8 Bc3+-) 34...Qg2 35.Kg2 Bf6 (better 35...Rh5 36.e4 Rg5 37.Kh1 Bf2+-) 36.Bf6?? (36.a7 Rh5 37.e4 Rb5+-) 36...Rf6? (36...Rg6 37.Kh3 gf6 38.Bc2+=) 37.Bd5?? (better 37.a7 Rf5 38.e4+-) 37...Ra7+/- 38.Bb7 Kg8 39.Rc1 Rf8 40.Rc7 Rd8?? (better 40...Rf5+/-) 41.Bd5 (41.Bd5 Kf8 42.Ra7 Rb8 43.Rf7 Ke8 44.a7 Rc8 45.Rg7 Kf8 46.Rg8 Ke7 47.Rc8 Kf6 48.Rg8 Ke5 49.a8Q h6 50.Rf8 h5 51.d4) 1-0. azer3136 (2230) - Abscence (2140), Rated Blitz game, lichess.org, 2016.

4.c4 cb5 5.cb5 d5 6.e3 Bd6 7.Bb2 Nf6 8.Nf3 Qe7 9.Be2 0-0 10.0-0 Bg4 11.d3 Nbd7 12.Nbd2 Rad8 13.Re1 Nb6 14.a4 Nfd7 15.Nf1 e4 16.Nd4 Be2 17.Qe2 Ne5 (better 17...ed3 18.Qd3 Nc5=+) 18.de4+= de4 19.Nf5 Qf6 20.Nd6 Qd6 (worse 20...Rd6 21.Ng3 Rd5 22.Ne4+/-) 21.Bd4 Nd3 22.Red1 Nc4 23.Ng3 f5 24.Qa2 Qe6 25.Ne2 Kh8 26.Nc1 Nb4 27.Qb3 Rc8 28.Ne2 Qg6 29.Nf4 Qe8 30.Rac1 Qf7 31.h4 h6 32.h5 Kh7 33.Ng6 Rfe8 34.Qc3?? (34.Rc3 Rc7+=) 34...Nd5?? (better 34...Na2 35.Qe1 Nc1 36.Rc1 Kg8-/+) 35.Qb3 Nf6?? (better 35...Nb4=) 36.Bf6+- gf6 37.Rd4 Ne5 38.Qf7 Nf7 39.Rc8 Rc8 40.Rd7 Kg7 41.Rb7 Rc4 (41...Rc1 42.Kh2 Rc4 43.Ra7+-) 42.Ra7 Ra4 (42...Rc1 43.Kh2 Rc2 44.Kg3+-) 43.b6 Rb4 44.b7 a4 45.Ne7 (45.Nh4 a3 46.Nf5 Kh7+-) 45...a3 (45...Nd8 46.Nf5 Kg8 47.Ra8 Rb7 48.Rd8 Kh7 49.Ra8+-) 46.Nf5 Kh7 47.Nd6!! a2 (47...Nd6 48.b8Q Double attack (48.b8Q Decoy)) 48.Nf7 Rb7 49.Ra2 (better 49.Ng5! Kg8 50.Ra8 Kg7 51.Ne6 Kh7 52.Ra2+-) 49...Rf7+/- 50.Ra6 Kg7 51.Re6 f5 52.Kh2 Rc7 53.Kg3 Rc2 54.f3 Re2 55.Kf4 ef3 (better 55...Rg2!? 56.fe4 Rg4 57.Kf5 Rg5 58.Kf4 Rh5+=) 56.gf3+/- Rh2 57.Rg6 Kh7 58.Kf5 Rh5 59.Kf6 Ra5?? (better 59...Rh3 60.Rg7 Kh8=) 60.e4?? (better 60.Rg7 Kh8 61.Re7+-) 60...Ra6-+ 61.Kf5 (61.Ke5 Rg6 62.f4-+) 61...Rg6 62.f4 (62.e5 h5 63.e6 Kg7-+) 62...Kg7 63.e5 h5 64.e6 Rg1 (64...Rg1 65.Ke5 h4 66.Kd6 h3 67.e7 Kf7 68.Kd7 Rd1 69.Kc6 h2 70.Kb5 h1Q 71.e8B Ke8 72.Kb4 Qd5 73.f5 Rd3 74.f6 Rb3 75.Ka4 Qb5) 0-1. azer3136 (2305) - falerito (2295), Rated Blitz game, lichess.org, 2016.

4.c4 Qb6 5.e3 Nf6 6.Bb2 cb5 7.cb5 Qb5?? (better is 7...d6=) 8.Bb5+- Bc5 (8...Nc6 9.Qc2+-) 9.Be5 (better is 9.Qc2 b6 10.d4 Bb7 11.dc5 Bg2 12.cb6 0-0 13.Be5 Bh1 14.Bf6 gf6+-) 9...Ne4 10.Nf3 0-0 11.d4 Bb6 12.0-0 d6 13.Bf4 Bg4 14.h3 Bh5 15.Bd3 Nf6 16.Nbd2 Bc7 17.Qc2 Nc6 18.Rab1 b6 19.Ne4 Ne4 20.Be4 f5 21.Bc6 Rac8 22.Bd5 Bf7 23.Qb3 Rce8 24.Bf7 Rf7 25.Ng5 Ree7 26.Nf7 Rf7 27.Rfc1 Kf8 28.Rc6 h6 29.Rbc1 (29.Rbc1 g6 30.Rc7 Rg7 31.Rc8 Ke7 32.R1c7 Kf6 33.Rf8 Rf7 34.Rff7) 1–0. Fournier,Frederic (1660) – medomo, Active, 2009.

4.c4 d5 5.bc6 bc6 6.cd5 cd5 7.Bb2 Bd6 8.Nf3 f6 (8...Nc6 9.Nc3 Rb8 10.Qc1+=) 9.e3 Ne7 10.Nc3 Be6 11.Be2 0-0 12.0-0 Nbc6 13.Nb5 e4 14.Nd6? (better is 14.Nfd4 Nd4 15.Nd4=) 14...ef3–+ (14...Qd6?! 15.Nd4+=) 15.Bf3 Qd6 16.Qa4 (16.Bc3 Ne5–+) 16...Ne5 17.Be2 Nc4 18.Bc4 dc4 19.Bc3 Rfb8 20.Rab1 Nd5 21.Rb8 Rb8 22.Qa5 Nc3 23.Qc3 Qd3 24.Qa5?? Rb2 25.Qa8 Kf7 26.Qa7 Kg6 27.a4 Rd2 28.a5 Rd1 (28...Rd1 29.h3 Qf1 30.Kh2 Qf2 31.Qc7 Qg1 32.Kg3 Qe3 33.Kh2 Qg1 34.Kg3 Rd3 35.Kh4 Rh3 36.gh3 Qg5) 0–1. Fournier,Frederic (1940) – JuanAntonio49, Active, 2011.

4.c4 d5 5.cd5 cd5 6.d4 Bd6=.

4.c4 d5 5.e3 dc4 6.Bc4 cb5 7.Bb5 Nc6 8.Bb2 Qd5 9.Bc6 bc6 10.Qf3 f6 11.Qd5 cd5 12.Ne2 (12.d4 e4=+) 12...Bd6 13.d4 Ne7 14.0-0 0-0 15.Nbc3 Ba6 16.Rfc1 Bc4 (16...Rab8 17.Rc2-/+) 17.Rc2 (17.Ne4! Bb8 18.N2g3=) 17...Rfc8 18.Rac1 Kf7 (18...Rab8 19.a4-/+) 19.a4 (19.de5 fe5 20.Ne4 Bc7=+) 19...Bb4 20.Nb5 (20.de5 fe5 21.Nb5 Be2 22.Re2 Rc1 23.Bc1 Rc8-/+) 20...Be2 (20...e4 21.Ng3-/+) 21.Re2 e4 22.Rec2 Rc2 23.Rc2 Rc8 24.Rc8 Nc8 25.Nc7? (better 25.Bc3=+) 25...Nb6-+ 26.Bc1 Ke7 (26...Na4?! 27.Nd5 f5 28.f3-/+) 27.Kf1 Kd7 (27...Na4?! 28.Nd5 Kd6 29.Nb4 ab4 30.Ke1-/+) 28.Nb5 Na4 29.Ke2 Nc3 30.Nc3 Bc3 31.Ba3 Bb4 32.Bb2 Kc6 33.Kd1 Kb5 34.Kc2 Kc4 35.f3 f5 36.fe4 fe4 37.h3 a4 38.g3 a3 39.Ba1 (39.Bc1 a2 40.Bb2-+) 39...h5 40.g4 hg4 41.hg4 g5 (41...g5 42.Kc1 Kb3 43.Kd1 Bc3 44.Ke2 Ba1 45.Kf1 a2 46.Ke1 Bc3 47.Kf2 a1Q 48.Kg2 Qa2 49.Kf1 Bd4 50.Kg1 Be3 51.Kh1 Bf4 52.Kg1 e3 53.Kf1 Qf2) 0-1. moss42 (2080) - kianas (2045), ChessWorld.net, 2014.

4.c4 d5 5.Nf3 Bd6 (5...e4!? 6.Nd4 dc4–/+) 6.bc6 bc6 7.cd5 cd5 8.e3 Nf6 9.Bb2 Nbd7 10.Be2 0-0 11.0-0 Qe7 12.Nc3 Re8 13.Rb1 e4 (worse is 13...Ba3 14.Ba3 Qa3 15.Nb5+=) 14.Nd4 Ne5 15.f4 ef3 16.Nf3 Ba6 (16...Bf5 17.Ra1 Nf3 18.Rf3+=) 17.Ba6= Ra6 18.Ne5 Be5 19.Qe2 0–1. Fournier,Frederic – Mataigne,Jean_Michel (2180), It Senlis FRA, 2001.

4.c4 Qf6 5.e4 (5.Nc3 Qe6=) 5...Bc5 Do you see the mate threat? 6.Nf3 d5 7.d3 (7.Nc3 dc4 8.Na4 Nd7 9.Bc4 Bd6+=) 7...de4 8.de4 Bg4 9.Be2 Nd7 10.h3 Bf3 11.Bf3 Ne7 12.Nc3 (12.Ra2 Nb6=) 12...Nb6=+ 13.Qe2 Bd4 14.Bb2 Ng6 15.g3 (15.Rc1 Rd8 16.Rd1 Nf4-+) 15...0-0 (15...Nc4 16.Qc4 Qf3 17.Rh2-+) 16.Nd1? (16.bc6 bc6 17.Ra2 Nc4-+) 16...Rfd8 (16...Nc4 17.Bd4 ed4 18.Qc4 Qf3 19.0-0 Qe4 20.Nc3 cb5 21.Qf7 (21.Ne4?? bc4 22.Nd6 c3-+) 21...Rf7 22.Ne4-+) 17.0-0? (17.Rc1 Na4 18.Bd4 ed4-/+) 17...Bb2?? (better 17...Nc4 18.Bd4 Rd4-+) 18.Nb2=+ Rd4 19.c5 (19.Rfd1=+) 19...Rad8 (19...Nd7 20.bc6 Qc6 21.Rac1-/+) 20.Rad1 (20.bc6 bc6 21.cb6 Rd2+=) 20...Nc8 (better 20...Nd7!?-/+) 21.b6= Qe6 22.Rd4 ed4 (worse 22...Rd4 23.Bg4 Qe8 24.Nc4+/-) 23.Bg4 Qb3 24.a4 Ne5 Black prepares d3 25.Rb1 (25.Bc8 Rc8 26.f4 Nd7-/+) 25...d3 26.Qd1 Qd1 (26...Qc3!? 27.Bc8 Rc8-/+) 27.Bd1 (27.Rd1 d2+=) 27...Ne7 (better 27...d2 28.Be2 f5 29.ef5 Rd5=) 28.g4?? (better 28.f4 Nd7 29.Nd3 Nb6 30.Bc2 (30.cb6?! Rd3 31.Kf2 Kf8=) 30...Na4 31.Rb7+-) 28...N7g6 29.Kg2 Nf4 (29...d2 30.f3-+) 30.Kh2 (30.Kg3 g5 31.f3 d2-+) 30...Ne2 (better 30...Rd4!? 31.Kg3 Re4-+) 31.Nd3-/+ Nd3 32.Be2 Nc5 33.Ra1 (33.Bf3 Kf8-/+) 33...Ne4-+ 34.Kg2 g6 (34...Nc3 35.Bc4 Rd4 36.Ba6 ba6 37.Rc1-/+) 35.Rc1 Rd4 36.Bc4 Rd2 37.Kf3 Nf2 38.Ke3 Rb2 39.Rf1 Rb4 (39...Nh3?! 40.Rf7 Rb4 41.Ba2 Ra4 42.Be6-/+) 40.Kf2 (40.Ba2 Ne4 41.Bf7 Kg7 42.Ba2-+) 40...Rc4 41.Rd1 Rb4 (41...Ra4?! 42.Rd7-+) 42.Rd7 Rb6 43.Rd4 (43.Rd8 Kg7-+) 43...Rb4 44.Rd7 b6 45.Rb7 (45.Rd6 c5-+) 45...b5 46.Rb6 (46.ab5 cb5 47.g5 a4-+) 46...Ra4 47.Rc6 b4 48.h4 (48.g5-+) 48...b3 49.h5 (49.Rc8 Kg7 50.Rc1 Rg4 51.Rh1-+) 49...b2 50.h6 Threatening mate... how? 50...Kf8 51.Rb6 Ra2 (better 51...Rb4 52.Rd6 b1Q 53.Rd8 Ke7-+) 52.Kg3 (52.Ke3 a4 53.Rb8 Ke7-+) 52…a4 (52...a4 53.Rb8 Ke7-+) 0-1. petrobbo (1970) - redi (2060), ChessWorld.net, 2014.

4.c4 Nf6 5.Bb2 d6 6.e3 cb5 7.cb5 Be6 8.Nc3 Nbd7 9.Nf3 Rc8 10.a4 Nb6 11.Be2 Nc4 12.Bc1 d5 13.Bc4 dc4 14.Ne5 Bd6 15.Nf3 0-0 16.Qc2 h6 17.Bb2 Re8 18.h3 Bb4 19.0-0 Qd3 20.Nd4 Qc2 21.Nc2 Bc3 (better is 21...Bf5!? 22.Rfc1 Red8=) 22.Bc3+/– b6 23.Nd4 Ne4 24.Rfc1 Nc5 25.Rf1 Rcd8 26.f4 Bd5 27.g4 f6 28.Rfb1 Be4 29.Rf1 White prepares the advance f5 29...Bd3 30.Rfe1 Ne4 31.Kg2 Rd7 (worse is 31...Nc3 32.dc3 Be4 33.Kf2+/–) 32.f5 Kf7 33.h4 h5 34.Kf3 hg4 35.Kg4 Rd5 36.Kf4 Nd6 (worse is 36...Nc3 37.dc3 Rde5 38.h5=) 37.Rh1 Nf5 38.Nf5 Rf5 39.Kg3 Re4 40.Rh2 Be2?? (better is 40...Kg6 41.Rf2 Rh5–/+) 41.Re2+- Rh5 42.Rh2 f5 43.Rf1 (better is 43.Bd4 c3 44.dc3 Re6+-) 43...g6 (43...Rg4 44.Kf3 g5+-) 44.Rf4 Rf4 45.ef4 Rh8 (45...Ke8+-) 46.Bh8 (46.Bh8 Ke6 47.Bd4+-) 1–0. combijack (1770) – hebbs2 (1685), gameknot.com, 2012.

4.c4 Qh4 5.e3 Qf6 6.Bb2 d5 7.Nf3 d4 (better is 7...Nd7!?=) 8.ed4+/– e4 9.Ne5 Qf4 10.bc6 bc6 11.Qa4 Ra7 (11...Ne7 12.c5 f6+-) 12.Nc6 (12.c5 Nf6+-) 12...Nc6? (better is 12...Bd7 13.d5 Bc5+=) 13.Qc6+- Bd7 14.Qb6 Qc7 (better is 14...Ra8 15.d5 Rb8+-) 15.Qc7 Rc7 16.Nc3 Rb7 (16...Bf5 17.c5+-) 17.Rb1 (17.0-0-0 Nf6+-) 17...Bd6 (17...Nf6 18.Be2+-) 18.c5 Bf4 19.Ne4 Be6 20.Bd3 Ne7 21.g3 Bc7 22.0-0 Bf5? 23.Bc3 Rb1 24.Rb1 Nc6 25.d5 Ne7 26.d6 Bd8 27.Bg7 Be4 28.Be4 Rg8 29.de7 Bc7 30.Bf6 Kd7 31.Bf5 Ke8 32.c6 Rg3 33.hg3 Bg3 34.Bd7 1–0. Fournier,Frederic – COMP Socker Conny 0.05, France, 2000.

4.bc6 dc6 5.Bb2 f6 6.Nf3 Be6 7.e3 Nd7 8.Be2 h5 9.h3 Nh6 10.0-0 (10.Nh4 Rh7+=) 10...Nf7 11.d3 (11.Nh4 Bd6 12.Bh5 Nb6+=) 11...Bd6 12.Nbd2 Qc7 (12...g5 13.Nh2 g4 14.hg4 hg4 15.Bg4+=) 13.e4 g5 14.c4 (14.Ne1 g4 15.h4 Nf8=) 14...0-0-0 (14...g4 15.hg4 hg4 16.Ne1–/+) 15.Qa4 (better is 15.d4!? g4 16.d5 gf3 17.de6 fe2 18.Qe2= (18.ef7?? ed1Q 19.Rfd1 Nb6–+; 18.ed7?! Qd7 19.Qe2 Ng5=)) 15...Nc5 16.Qc2 g4 17.hg4 hg4 18.Nh2 Qd7 19.g3 Ng5 20.Kg2?? (better is 20.Rfb1–+) 20...Rh2! 21.Kh2 (21.Kh2 Qh7 Mate attack) 21...Qh7 22.Kg1 (22.Kg2 Qh3 23.Kg1 Rh8 24.Be5 Qh2) 22...Rh8 23.f4 (23.Be5 Qh2) 24…Qh2 0–1. Fournier,Frederic – MarouaneS (2005), Partie amicale, 3m + 0s, 2009.

4.e3 cb5 5.Bb5 Nf6 6.Bb2 Nc6 7.Bc6 bc6 8.Be5 Qb6 (8...d6!? 9.Bd4 Be7+=) 9.Bf6+/- gf6 10.Nc3 d5 11.d4 Ba6 12.Nge2 Bd6 13.Rb1 (13.e4 Be2 14.Ke2 f5+-) 13...Qc7+/- 14.g3 (14.Qc1 Qe7 15.a4 Bb4+/-) 14...h5 (14...Ba3 15.Na4=) 15.0-0 (15.a4 Bb4 16.Qd2 c5+=) 15...h4 (better 15...Ba3 16.h4 Rg8=) 16.Nf4?? (better 16.e4+=) 16...hg3 17.fg3 0-0-0?? (better 17...Bf1 18.Qf1 Ba3-/+) 18.Rf2 Bf4? (better 18...Rde8!?+/-) 19.Rf4 (19.gf4?! Rdg8 20.Rg2 Qe7+=) 19...Rde8 (19...Qd6 20.Qg4 Kc7 21.Qg7+-) 20.Qf3 Qd7 (20...Rh6 21.e4+-) 21.Na4 (21.Rf6!? Bb7+-) 21...Qh3 22.Qf2 Rh6 23.Nc5 Bb5 (23...Bc4 24.Rf6 Reh8 25.Rh6 Rh6 26.Rb7+-) 24.a4 (24.Rf6 Rf6 25.Qf6 Re3=) 24...Bc4 25.Rf6 Reh8 26.Qf5?? (better 26.Rh6 Rh6 27.Rb7+-) 26...Qf5-+ 27.Rf5 Rh2 28.g4 (28.Rf7 Rh1 29.Kg2 R8h2 30.Kf3 Rb1 31.Rf8 Kc7 32.Rf7 Kd8 33.Rd7 Kc8-+) 28...Rh1 29.Kf2 (29.Kg2 Rb1 30.Rf7 Rg8-+) 29...Rb1 30.e4 de4 31.Kg3 (31.Ne4 Rh2 32.Kg3 Rc2 33.Ra5 Rd1 34.Nd6 Kb8-+) 31...Rc1 (better 31...e3 32.Re5 Rg1 33.Kf4-+) 32.Kf4 (32.Ne4 Rd8 33.Rc5 Rc2 (worse 33...Rd4 34.Rc4 Rc4 35.Nd6 Kc7 36.Nc4-+) 34.Rc6 Kb7-+) 32...Rc2 (better 32...Re8 33.Re5 Re5 34.de5 Bd5-+) 33.Ke5 (33.Ne4 Bd5 34.Nf6-+) 33...e3 34.Rf7 (34.Kf4 Re8 35.d5 Rf2 36.Kg5-+) 34...e2 35.Ne6 Be6 (35...e1Q 36.Kd6 Qe6 37.Kc5 Qd5 38.Kb6 Qd4 39.Ka5 Qc5) 36.Rc7 (36.Rf4 e1Q 37.Re4 Qg3 38.Ke6 Rh6 39.Kf7 Qf3 40.Kg8 Rg6 41.Kh7 Qf7 42.Kh8 Rh2) 36...Kc7 37.Ke6 (37.Ke6 e1Q 38.Kf6 Rf2 39.Kg7 Qe7 40.Kh8 Rf8; 37.Kf6 Rf8 38.Kg5 Rg8 39.Kf4 Rg4 40.Ke5 e1Q 41.Kf6 Rf2 42.Ke7 Bd5) 1-0. danishguy (2105) - OLDDIVCHESS (2255), Rated Bullet game, lichess.org, 2020.

4.e4 cb5 5.Bb5 Qb6 6.a4 (6.Nc3 Bc5 7.Qf3 Nf6+=) 6...Bc5 (6...Nf6 7.Nc3=) 7.Nh3 (7.Qf3 Nf6=) 7...Nf6 (7...Qg6 8.Qf3=) 8.0-0 (better is 8.Qf3=) 8...Ng4?? (better is 8...Ne4!? 9.d3 Nd6=+) 9.Qe2 (9.Qg4 0-0 10.Qf5 Qe6 11.Qe6 fe6+-) 9...0-0?? (better is 9...Qg6=) 10.Qg4+- d5 11.Qf3 de4 12.Qe4 Bh3 13.gh3 f5 14.Qg2 Bd4 15.c3 Bc5 16.Bb2 f4 17.c4 f3 18.Qg3 e4 19.Qg7 1–0. icewater – Apracs, Caissa.com, 2004.

4.e4 cb5 5.Bb5 Bc5 6.Nc3 Nc6 7.Nf3 d6 (7...Nf6+=) 8.h3 (8.0-0 Nge7+/–) 8...f5 (better is 8...Nf6!?=) 9.d4+/– ed4 10.Nd4 Nge7 11.Ne6?? (better is 11.Bg5 Bd4 12.Qd4+/–) 11...Be6–+ 12.ef5 (12.Rb1 0-0–+) 12...Bf5 13.0-0 0-0 14.Bc4 Kh8 15.Bg5 Qd7 16.Re1 (16.Na4 Ba7 17.Bb5 Be4–+) 16...Bh3! 17.g3 (17.gh3 Bf2 (17...Qf5)) 17...Bf2 18.Kh2 Be1 19.Qe1 Ne5 (better is 19...Nd4 20.Be2 Rf1 21.Be7 Re1 22.Re1 Qe7 23.Kh3 Qe6 24.Kh2–+) 20.Bb5 Qg4 (21.Be2 Nf3 22.Bf3 Rf3 23.Be7 Bf1 24.Qf1 Qg3 25.Kh1 Rf1 26.Rf1 Qc3 27.Bd6 Qc6 28.Kg1 Qd6–+; 20...Nf3 21.Kh1 Qg4 22.Qd1 Nf5 23.Ne2 Ne3 24.Qg1 Ng1 25.Bc6 Nf3 26.Be3 Bf1 27.Nf4 Rf4 28.Bf3 Qf3 29.Kg1 Qg2) 0–1. lustylady – 5800b, Live Game Caissa's Web, 2006.

4.e4 d5 5.ed5 cd5 6.Nf3=.

5.a4 Nf6 6.c4 Be7 7.Nf3 e4 8.Nd4 d5 9.e3 c5 10.Nc2 0-0 11.Be2 dc4 12.Bc4 Bg4 13.Be2 Be2 14.Qe2 Qd3 15.Qd3 ed3 16.Nca3 Nbd7 17.Nc4 Nd5 18.Ra3 N7b6 19.Nb6 Nb6 20.Rd3 Na4 21.Rd7 Nb2 22.Re7 b6 23.Nc3 Rfd8 24.Ke2 Nc4 The backward pawn on d2 becomes a target 25.Ne4 a4 26.Rb7? (better is 26.Rc1!? Na5 27.Rc2+=) 26...f5–+ 27.d3 Na5 (27...fe4?! 28.dc4 Rdb8 29.Re7=) 28.Nf6 gf6 29.Rb6 Nb3 0–1. Urgelles Paumier,A – Rodriguez Agramonte,J, 3689 J.R. Capablanca IM /2000 G–2, 2003.

5.c4 Be6 6.e3 (6.e4 Nf6 7.Nc3 Nbd7=) 6...Nd7 7.d4 (7.Nc3 Ngf6=) 7...Ngf6 8.Nd2 Be7 (8...cb5 9.de5 de5 10.cb5=) 9.Bd3 (9.bc6 bc6 10.Ngf3 e4=) 9...Qc7 (9...ed4 10.ed4 0-0 11.bc6 bc6 12.Ngf3=) 10.Ngf3 0-0 (10...ed4 11.Bd4 Ne5 12.Be2=) 11.0-0 h6 (11...ed4 12.Nd4 Nc5 13.Bf5=) 12.Qb1 ed4 13.Nd4 Nc5 14.Bc2 (14.Rd1 Bg4 15.f3 Be6+=) 14...d5= 15.bc6 (15.cd5 Bd5 16.Rc1 Rfd8+=) 15...bc6 16.cd5 cd5 (16...Bd5 17.e4 Be6 18.Ne6 fe6 19.Qe1=) 17.a4 (17.Qd1 Rab8 18.Rb1 Rb7=) 17...Bd7 (17...Rac8 18.Nb5 Qb8 19.Bd4=) 18.Nf5 Bf5 19.Bf5 Rab8 20.Qc2 Rfe8 (20...g6 21.Bh3+=) 21.Rac1 Nfd7 22.Nb3 Bd6 (better is 22...Qd8!? 23.Nd4 Bf6+=) 23.Nc5+- Nc5 24.Bd4 Ne6 (24...Na6 25.Qc7 Nc7 26.Rc6+-) 25.Qc7+- Nc7 (25...Bc7?? 26.Be6 Bh2 27.Kh2 fe6 28.Rc7+-) 26.Rc6 Be5 27.Bd7 Bd4 28.Be8 (< 28.ed4 Re7 29.Rc7 Rd8+/–; 28.Rc7?! Bb6 29.Be8 Bc7=) 28...Ne8 29.ed4 Rb4? (29...Nf6+-) 30.Rc8 Kf8 (30...f5 31.Re8 Kf7 32.Rd8 Rd4 33.Ra1+-) 31.Re1 (31…f5 32.Rce8 (< 32.Ree8 Kf7 33.Re1 Ra4+-) 32...Kf7 33.R8e7 Kg6 34.Ra1 Rd4 35.Ra7+-) 1–0. Luzuriaga,Norberto – de Zavalia,Gonzalo, corr Argentina, 2002.

5.c4 Nf6 6.d4 Nbd7 7.Nc3=.

5.d4 e4=.

5.e3 Nf6 6.Be2=.

5.e3 Nf6 6.Nf3 Be7 7.d4 e4 8.Nfd2 d5 9.c4 0-0 10.Nc3 cb5 11.Nb5 Nc6 (11...Bf5 12.Nc3=) 12.Nc3 (12.cd5 Na7+= (12...Qd5? 13.Nc7 Qd8 14.Na8+-)) 12...Be6= 13.cd5 Bd5 14.Nd5 Qd5 15.Bc4 Qg5 16.0-0 Bd6 17.h3 Rad8 18.Rc1 Nh5?? (better 18...b5 19.Bf7 Rf7 20.Rc6 Qd5+=) 19.Ne4+- Qh4 20.Qg4 Qg4 21.hg4 Nf6 22.Nf6 gf6 23.Bd3 Kg7 24.f4 h6 (24...Rfe8 25.Kf2+-) 25.Rf3 (25.d5 Ne7 26.e4 Ng6+-) 25...Be7 (25...Rc8 26.Rh3+-) 26.Kf2 Rh8 27.Rh1 a4 28.Rh5 White intends g5 28...b6 29.Rg3 White intends g5 29...Na5 30.d5 Nb3 (30...Rdg8 31.g5 hg5 32.fg5+-) 31.g5 hg5 (31...Kf8 32.gh6 b5+-) 32.Rgg5 (32.Rgg5 Kf8 33.Rh8) 1-0. FeegLood (2570) - flora58 (2095), Time forfeit, 2015.

5.e3 g6 6.f4 Bg7 (6...Qh4 7.g3 Qe7 8.Nf3+=) 7.Nf3 Nf6 8.fe5 Ng4 9.Be2 (9.Bc4 0-0+=) 9...0-0 10.0-0 cb5 11.Bb5 Ne5 12.Bc3 (12.Nc3 Be6+=) 12...Nbc6= 13.Ne5 de5 14.Bc4 Qc7 15.Rf2 (15.d3 Rb8=) 15...Rb8 16.Qe2 Bd7 (16...Be6 17.Be6 fe6 18.Rf8 Rf8 19.Ra2=) 17.Bb3 b5 18.d3 Ne7 (18...Rbd8 19.Qf3=) 19.Ba2 (19.Qf1 Be6=) 19...b4 20.ab4 ab4 21.Bb2 h5 (21...Nf5 22.e4 Nd4 23.Qd2=) 22.e4+= Be6 23.Be6 fe6 24.Bc1 (24.h3 Rf2 25.Qf2 Rf8–/+) 24...Rf2 (24...Nc6!? 25.Rf8 Rf8+=) 25.Qf2+= Rf8 26.Ra7 Qc8 (26...Rf2? 27.Rc7 Rf7 28.Bd2+-) 27.Qe2 Nc6 28.Ra2 Nd4 (better is 28...b3!? 29.cb3 Nb4–/+) 29.Qd1= Rf7 30.Bd2 Qf8 31.Be3 Bh6 32.Bh6 Qh6 33.c3 bc3 34.Nc3+= Qe3 35.Kh1 Rc7 36.Ra3 Nb5 37.Ra8+= Kg7 38.Na2 Rc2 (38...Rc2 39.Qg1 Qd3–+) 0–1. Vettenburg – Mothes, corr SOK–95–110, 1995.

5.Bb2 Bd6 6.c4 Be6 7.Qb3 Nd7 8.d4 ed4 9.ed4 a4 10.Qc2 dc4 11.Bc4 (11.d5 Bd5 12.Bg7 Be5 13.Bh8 Bh8=+) 11...Bc4 12.Qc4 Nb6 13.Qe2 Qe7 (13...Ne7 14.bc6 bc6 15.Nf3=+) 14.bc6 bc6 15.Nd2 Nf6 16.Qe7 Be7 17.Ngf3 Nbd5 18.0-0 0-0 19.Rfe1 Rab8 20.Bc1 Bd6 21.Ne5 Be5 22.de5 Nd7 23.Nf3 Nc5 24.Be3 Nb3 25.Rad1 Rfd8 26.Bg5 Rd7 27.Kf1 (27.e6!? fe6 28.Re6=) 27...h6 28.Bh4 g5 29.Bg3 c5?? (better 29...Rbd8 30.Rd3 c5=+) 30.e6+- fe6 31.Re6 (better 31.Bb8 c4 32.Be5+-) 31...Ne3=+ 32.fe3 (32.Ke2!? Nd1 33.Bb8 Nc3 34.Ke3=+) 32...Rd1-/+ 33.Ke2 Rbd8 34.Rh6 c4 (34...Nc1 35.Kf2 Nd3 36.Ke2-/+) 35.Be5 g4 (35...Nc1 36.Kf2 Nd3 37.Kg3 Ne5 38.Ne5-/+) 36.Nd4 Nd4 37.Bd4 Rg1?? (37...R8d4 38.ed4 Rd4 39.Rc6=) 38.Rg6?? (better 38.Rh8 Kf7 39.Rd8 Rg2 40.Kf1+-) 38...Kf7 39.Rg4 Ke6 (39...Rg8 40.Rf4 Ke6 41.Rf6 Ke7 42.g3=+) 40.Bc3 Rc8 41.Kf3 (41.h4 Rb1+=) 41...Rc1= 42.Bd4 (42.Bb2 Rf1 43.Ke2=+) 42...c3-/+ 43.Ke4 c2 (43...Rd1 44.Rg6 Ke7 45.Rg7 Kf8-+) 44.Rg6-/+ Kf7 45.Rf6?? (45.Rg7 Kf8 46.Rh7-+) 45...Ke7-+ 46.Rf2 Rb1 47.Rc2 Rc2 48.g4 Rh2 49.g5 Rg2 50.Bf6 Kf7 51.Kf5 Rb3 52.Ke5 (52.Ke4 Rg3 53.Kd5 Rbe3-+) 52...Re3 53.Kd6 Ra3 54.Kc5 (54.Ke5 Rag3 55.Ke4 a3-+) 54...Rb3 55.Kc4 Rb7 (55...Rb7 56.Kd3 a3-+) 0-1. Minister007 (2280) - agnivo (2350), Rated Blitz game, lichess.org, 2020.

5.Bb2 Bd6 6.Nf3 Nd7 7.c4 Ngf6 8.Nc3 e4 9.Nd4 Ne5 10.cd5 cd5 11.Qb3 Be6 12.Ne6 fe6 13.Be2 Rc8 14.0-0 0-0 15.Rac1 Neg4 16.Bg4 Ng4 17.h3 Qh4 18.Nd5? (18.Ne4 Rc1 19.Rc1 de4 20.Qe6 Kh8 21.Rf1 Bh2 22.Kh1=) 18...Nf2?? (18...Rc1 19.Ne7 Kh8 20.Bg7 Kg7 21.Qb2 Kf7 22.Qc1 Ke7 23.Qe1-+) 19.Ne7?? (19.Nf6 Rf6 20.Qe6 Re6 21.Rc8 Kf7 22.Rf2 Kg6 23.Rg8-+) 19...Be7?? (19...Kh8 20.Qe6 Rc1 21.Bg7 Kg7 22.Nf5 Rf5 23.Qf5 Rf1 24.Kf1 Nd3 25.Qd7 Be7-+) 20.Qe6+- Kh8 21.Rc8 Nh3 (21...Bd8 22.Qd7 Nh3 23.Qh3 Rf1 24.Kf1 Qe7 25.Qh6 Qf7 26.Ke1 Qf1 27.Kf1 Kg8 28.Qg7) 22.gh3 (22.Qh3 Qf2 23.Rf2 Rg8 24.Rg8 Kg8 25.Qc8 Bf8 26.Rf8) 22...Qg3 23.Kh1 Rc8 (23...Rc8 24.Qc8 Bf8 25.Qf8; 23...Qg2 24.Kg2 Rd8 25.Rd8 Bd8 26.Rf8). GM_HUSARZ (2010) - maxi_sabale (2000), Rated Bullet game, lichess.org, 2015.

5.c4 Be6 6.cd5 cd5 7.Nf3 Nd7 8.Bb2 Bd6 9.Be2 Ngf6 10.Nc3 b6 11.0-0 Rc8 12.Rc1 Ng4 13.h3 h5 14.d3 Nh6 15.e4 d4 16.Nb1 (16.Na4 Rc1 17.Bc1 Nf6=) 16...Nc5+= 17.Nbd2 g5 18.Nc4 f6 (18...Bc4 19.dc4 g4 20.Nd4 ed4 21.Qd4+=) 19.Nd6 (19.Nh2 g4 20.hg4 hg4 21.Ng4 Ng8=) 19...Qd6 20.Nd2 g4 21.Nc4 Qd8 22.h4 Nf7 23.g3 (23.f3 f5 24.g3 gf3 25.Rf3 f4–+) 23...Nd6 24.Nd6 Qd6 25.f4 Ke7 (25...Qd7!?+=) 26.fe5= fe5 27.Qd2 Rcg8 28.Bd1 Qd7 (better is 28...Ke8!?=) 29.a4+/– Nb3? (better is 29...Rc8!?+/–) 30.Bb3+- Bb3 31.Ba3 Kd8 32.Rc6 Ke8 33.Qc1 Be6 34.Rf6 (34.Rf6 Rh7 35.Rfe6 Kd8 36.Red6 Qd6 37.Bd6 Kd7 38.Rc7 Ke8 39.Qc6 Kd8 40.Qa8) 1–0. Fournier,Frederic (1895) – Godart,Michel (1780), FRA Cup (Team) 3T Senlis–SaintQuentin, 2011.

5.c4 Nf6 6.Bb2 Bd6 7.d4 e4 (7...ed4 8.Qd4 Nbd7 9.Nf3=) 8.Nc3 0-0 9.c5 Be7 10.Qc2 Bf5 11.Nge2 h6 (11...cb5 12.Ng3 Bd7 13.Bb5=) 12.Ng3 Bg6 (12...Bg4 13.Rb1=) 13.Be2+= cb5 14.Bb5 Nc6 15.Na4 Qc7 (15...Na7 16.Be2+=) 16.Nb6 Rad8 (16...Ra7 17.Qb3+=) 17.Bc3+/– Bd6 (17...h5 18.Qa4+/–) 18.Rb1 (worse is 18.cd6 Qb6 19.Rb1 Rd6=) 18...Bg3 19.hg3 Ng4 20.Qa2 Ne7 (20...Nf6 21.Qd2+/–) 21.Ba5+- Nc6 22.Bc3 Ne7 23.a4 Nf6 24.a5 Nf5 (24...Bf5 25.a6 ba6 26.Qa6+-) 25.a6 ba6 26.Ba6 Ng3? (better is 26...Rb8+-) 27.fg3 Qg3 (27...Ng4 28.Qe2 (28.Nd5?! Qg3 29.Kf1 Rd5=) 28...Qg3 29.Kd2+-) 28.Qf2 Qg5 (28...Qc7 29.Bb5+-) 29.c6 Ng4 (29...Rd6 30.Bb7 Ng4 31.Qf4 Ne3 32.Qg5 (32.Qd6?! Ng2 33.Kf1 Ne3 34.Ke1 Nc2 35.Kd1 Ne3 36.Ke1 Nc2 37.Kd1 Ne3 38.Ke1=) 32...hg5 33.c7+-) 30.Qf4 (30.Qg3 Qe3 31.Qe3 Ne3+-) 30...Ne3 (30...Qf4 31.ef4 e3 32.Ra1+-) 31.Qg5 hg5 32.c7 Ng2 (32...Rd6 33.Kf2 Ng4 34.Kg3+-) 33.Kf1 Nh4 (33...Nf4 34.cd8R Rd8 35.Nc8+-) 34.Bb4 Rfe8 (34...e3 35.Rc1 Rfe8 36.Be7+-) 35.Be7 Rc8 (35...Rb8 36.cb8R Rb8 37.Bg5 Nf3+-) 36.Nc8 e3 (36...Nf5 37.Rb8 f6 38.Nd6 Ne7 39.Bb5+-) 37.Rb8 (37.Rb8 Kh7 38.Bg5 e2 39.Ke1+-) 1–0. Cirulis,Ilmars (1790) – Hilbert,Stephan J (1755), FICGS, 2016.

5.bc6 Nc6+= 6.Nf3 Nf6 7.Bb2 e4 8.Nd4 Bd6 9.Nc6 bc6 10.Be2 0-0 11.0-0 Qb6 (11...Rb8 12.Bc3–/+) 12.Qc1 (12.Bf6 gf6 13.Nc3 Be5=) 12...Rb8 13.Ra2 Be6 14.Bc3 (14.Bf6 gf6 15.c4 Qc7+=) 14...d4 (14...Qb1!? 15.Qb1 Rb1 16.Rb1 d4–+) 15.Rb2+= Qc7 16.Bd4 Rb2 (16...Bh2 17.Kh1 Be5 18.Be5 Qe5 19.Rb8 Rb8 20.d4–/+) 17.Qb2= Rb8 18.Qa1 c5 (18...Bh2!? 19.Kh1 Bd6=) 19.Bf6+= gf6 20.Qf6 Be5 (20...Bh2!? 21.Kh1 Be5 22.Qg5 Bg7+=) 21.Qg5+/– Kh8 22.g3 Rg8 (22...Rb2 23.f4 ef3 24.Bf3+/–) 23.Qh4 Qd8? (better is 23...f5!?+-) 24.Qe4 Rg7 (24...Qd6 25.f4 Bg7 26.Bc4+-) 25.Bf3 (better is 25.Qe5 c4 26.d3+-) 25...Bf6 26.Bg2 Qe7 27.f4 Bc8 28.Nc3 Qe4 29.Ne4 Bc3 30.dc3 Be6 31.Nc5 Rg3 32.Ne6 Rg2 (32...Rg2 33.Kg2 Kg8+-). Fournier,Frederic (1680) – Emmanuel9999 (1810), Active (1/0), 2005.

5.d4 e4=.

4.a4 Nf6 5.e3 Bd6 6.Bb2 0-0 7.d3 d4 8.ed4 ed4 9.Bd4 Bb4 (9...Bh2 10.Nf3 Re8 11.Be2+=) 10.c3 (better is 10.Bc3!?+=) 10...Qd4–/+ (10...Qd4 11.Ne2 Re8–+) 0–1. Neil,Charlie – Simmelink,Joop (2240), FICGS, 2016.

4.Bb2 f6 5.e3 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 a5 5.b5).

4.Bb2 f6 5.e3 Be6 6.Nf3 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Be6 5.Nf3 a5 6.b5).

4.d4 ed4 5.Nf3 Bd6=.

4.d4 ed4 5.Nf3 Be7 6.Nd4 Nf6 7.e3 c5 8.bc6 bc6 9.Bd3 0-0=.

4.d4 ed4 5.Nf3 Nf6 A) 6.Bg5 c5 7.bc6 Nc6 8.Nd4 h6 9.Bh4 Be7=+; B) 6.Bf4 Bc5 7.Nd4 Nh5 8.Bc1 0-0 9.e3 Nf6=.

4.d4 Qd6 5.e3 (5.de5 Qe5 6.Ra2 Bg4=) 5...Nf6 6.Bb2 ed4 (6...Nbd7 7.c4=) 7.Qd4 (7.Bd4 Be7=) 7...Be7 8.c4 (8.Nf3 0-0=) 8...0-0 (8...c5 9.Qc3=) 9.Nf3 Be6 10.Nbd2 (10.c5 Qc5 11.Qc5 Bc5 12.Bf6 gf6=+) 10...c5 11.Qc3 Rd8 12.Be2 (12.cd5 Bd5 13.e4 Be6+-) 12...Ne8 13.cd5 Bf6 14.Qc2 Qd5 (14...Bb2 15.Ra2 Bd5 16.Rb2= (16.Qb2? Ba2 17.Qa2 Qg6–/+)) 15.Bc4 Bf5? (better is 15...Qh5 16.Bf6 Nf6 17.Be6 fe6+=) 16.e4+- Be4 17.Ne4 Bc3 18.Qc3 Qe4 19.Be2 Nd7 20.0-0 Nef6?? 21.Rae1 Re8 22.Bc4 Qg4 23.h3 Qf5 24.Re8 Re8 25.Qa5 Qc2 26.Qc3 Qc3 27.Bc3 Nb6 28.Bd3 c4 29.Bf6 cd3 30.Bc3 Rc8 31.Bd4 Nc4 32.Rc1 Nd6 33.Rc8 Nc8 34.Bc5 (34…f6 35.Bb4+-) 1–0. Olofsson,J – Edmark,Mats, corr SSKK 2–777, 1995.

4.d4 Bd6 5.Nc3 Ne7 6.e4 de4 7.Ne4 ed4 8.Nf3 Bg4 9.Qd4= Bf3=.

4.d4 Bd6 5.Nf3 e4 6.Nfd2 =+.

4.d4 Nd7 5.Nc3 Ngf6 6.Bg5 (6.de5 Ne5 7.Qd4 (7.Nf3 Bd6 8.Bg5 c6 9.Qd4 Qe7 10.bc6 bc6 11.Bf4) 7...Bd6 8.Nf3 c5 9.bc6 Nc6 10.Qd3 0-0 11.Bg5; 6.Nf3 A) 6...e4 7.Nh4 (7.Nd2 Bd6 8.g3 0-0 9.Bg2 Nb6 10.Nf1 Ng4 11.h3; 7.Ne5 Bd6 8.Bf4 0-0 9.b6 Nb6 10.e3 Ne8 11.Be2; 7.Ng5 Bd6 8.f3 ef3 9.gf3 0-0 10.Qd3 Nb6 11.Nh3) 7...Nb6 8.g3 Be7 9.f3 h6 10.fe4 Ne4 11.Ne4; B) 6...Bd6 7.de5 Ne5 8.Bg5 c6 9.Qd4 Qe7 10.bc6 bc6 11.Bf4) 6...c6 (6...ed4 7.Qd4 Bc5 8.Qh4 Ne5 9.Nf3 Ng6 10.Bf6 gf6 11.Qa4) 7.de5 (7.Nf3 h6 8.Be3 Bd6 9.bc6 bc6 10.de5 Ne5 11.Ne5) 7...Ne5 8.e4 (8.bc6 bc6 9.Nf3 Bd6 10.Qd4 Nf3 11.gf3) 8...Bc5 9.Nf3 (9.bc6 bc6 10.ed5 (10.Be2 0-0 11.Nf3) 10...Bf2 11.Kf2 Nfg4 12.Ke1 Qg5 13.Qd4–/+) 9...Neg4–/+ 10.Bh4 (10.e5 Nf2 (10...Bf2 11.Kd2) 11.Qe2 A) 11...Nh1 12.ef6 Be7 13.fe7+/– (13.Qe7 Qe7 14.fe7 f6+/–); B) 11...0-0–+) 10...Qb6 (10...Qe7 11.bc6 bc6 12.Nd4–/+) 11.Qe2 de4 (11...Ne4 12.Ne4 de4 13.bc6 Qc6 14.Nd2–+) 12.Na4 (12.Nd2 0-0 13.Nc4 Qa7–/+) 12...Qa7 (12...Bf2 13.Bf2 Qf2 14.Qf2 Nf2 15.Kf2 ef3 16.Re1 Kf8 17.bc6 bc6 18.Kf3–/+) 13.Nd2 0-0 (13...Be6 14.Nc5 Qc5 15.bc6 (15.Ne4?? Ne4 16.Qe4 Qc3 17.Kd1 Rd8 18.Bd3 Qa1 19.Kd2 Qh1 20.Bd8 Nf2–+) 15...bc6 16.c4–/+ (16.Ne4 Ne4 17.Qe4 Qc3 18.Kd1 Rd8 19.Bd3 Nf2 20.Bf2 Qa1 21.Kd2 Qh1–+)) 14.Nb3+= Be7 15.b6 Qb8 16.h3 Ne5 17.Bf6 Bf6 (worse is 17...gf6 18.Qe4 Re8 19.Be2=) 18.0-0-0 Bf5 (18...Be7 19.Nbc5+=) 19.g4 Be6 20.Nbc5 Rd8 (20...Bd5 21.Qe3 h6 22.Ne4–/+) 21.Bg2 (21.Rd8 Qd8 22.Ne6 fe6 23.Qe4 Qd6–+) 21...Bc4 (21...Bd5!? 22.Ne4 Be7–+) 22.Qe3 (22.Qe4? Bd5 23.Rd5 Rd5–+) 22…Bb5 0–1. Grimm,Wolfgang (1975) – Raap,Christian (2285), remoteschach.de, 2010.

4.d4 Nd7 5.e4 de4 6.de5 Ne5 7.Qd8 Kd8 8.Bb2 Bd6 9.Nd2 Nf6 10.Ne2 Bd7 11.Ng3 Re8 12.Be2 (12.Nde4? Ne4 13.Ne4 Nc4 14.Bc4 Re4 15.Kd2 Rc4 16.Bg7 Bb5–+) 12...Nd3 13.cd3 ed3 14.0-0?? (14.Bf6 gf6 15.Nde4 Bb5 16.Rb1 Bg3 17.Rb5 Re4 18.hg3 Re2 19.Kd1 Rf2 20.Rb7–+) 14...de2–+ (14...Re2?! 15.Ne2 de2 16.Rfb1–/+) 15.Rfe1 Bb5 16.Bf6 gf6 17.Nge4 Bf4 18.g3 Bd2 19.Nd2 Ra6 20.f4 Rd6 21.Nf3 b6 22.Kf2 Bc4 23.Rac1 Re4 24.Rc2 Bd3 25.Rd2 Ke7 26.Rc1 (26.Ng1 Bc4 27.Rc2 Rd1–+) 26...c5 27.Ne1 Ba6 28.Rcc2 Red4 29.Nf3 Rd2 30.Nd2 Kd7 31.Ke1 Rd3 32.Ra2 f5 33.Kf2 c4 34.Nf3 (34.Ke2 c3 35.Ke1–+) 34...Rf3 0–1. David Payne (1815) – knightwiz (2040), ChessWorld.net, 2002.

4.d4 e4 5.c4 dc4 (5...Nf6 6.Bg5 dc4 7.e3 h6 8.Bf6 Qf6 9.Nd2 Bf5=) 6.Nc3 (6.e3 Qg5 7.Qa4 Nf6 8.f4 Qg6 9.Ne2 Bg4=+) 6...c6 7.e3 cb5 8.Nb5 Nf6 (8...Be7 9.d5= Bf6=) 9.Bc4 Be7 =.

4.d4 e4 5.e3 Nf6 (5...Bd6 6.c4 Nf6 7.Nc3 dc4 8.Bc4 0-0 9.f3 Bf5=) 6.c4 Bd6 7.Qc2 Bf5 8.Nc3 dc4 9.Bc4= Nbd7=.

4.d4 e4 5.Bf4 Nf6 (5...Be7 6.e3 Nf6 7.c4 Be6 8.Qc2 c6 9.c5 0-0=; 5...Be6 6.Nd2 Nf6 7.e3 Bd6 8.Bd6 Qd6 9.c4 0-0=) 6.e3 Be6 7.Nd2 Bd6 8.Bd6 Qd6 9.c4= 0-0 =.

4.e3 c5 5.Bb2 d4 6.ed4 cd4 7.c4 (7.Qe2 Qe7+=) 7...Be6 8.d3 Nd7 9.a4 (9.f4 Bc5=+) 9...Nc5 10.Nf3 Qc7 11.Be2 Nf6 12.0-0 Bd6 13.Nbd2 (13.Ng5 0-0=) 13...0-0 14.Nb3 b6 (14...Rfe8 15.Ba3=+) 15.Nc5 Bc5 16.Re1 Rad8 17.Nd2 Bf5 18.Ne4? (better 18.Qc2!?=+) 18...Be4 19.de4 h6 (19...Bb4!? 20.Rf1 Ne4 21.Qc2-+) 20.Bf3 (20.Bd3!?=+) 20...Bb4-/+ 21.Re2 Qc4 22.Rc1 Qe6 23.Rec2 (23.Rc6 Rd6 24.Rd6 Bd6-+) 23...Rc8 (23...Qb3!? 24.Rd2 Qd1 25.Rdd1-+) 24.Rc6-/+ Rc6 25.Rc6 Qa2 26.Bd4? (better 26.Ba1-/+) 26...ed4-+ 27.e5 (27.Rb6 Re8 28.g3 Ne4 29.Be4 Re4 30.Rb8 Kh7-+) 27...Nd7 28.g4 (28.Be4-+) 28...Ne5 29.Bd5 (29.Rb6 d3 30.Rb7-+) 29...Nc6 (29...Qd5 30.Qf1 Nc6 31.h3-+) 30.bc6?? (better 30.Ba2 Ne5 31.f4=) 30...Bc5 (better 30...Qd5 31.c7-+) 31.Qf3 (31.Ba2 Re8 32.Qf3 Re1 33.Kg2+-) 31...Qa4-+ 32.h4 (32.Be4 Qa3 33.Qf4 d3-+) 32...d3! 33.Qd3 Qd4 (better 33...Qg4 34.Kf1-+) 34.Qf3 (34.Qd4 Bd4 35.Kg2 b5-+) 34...a4 35.c7 (35.Qf5 Qd2-+) 35...a3 (35...Qe5 36.g5 Qc7 37.g6-+) 36.c8Q (36.Qf5-+) 36...Rc8 37.Qf7 (37.Kg2-+) 37...Kh8 38.Qf3 Qf6 (38...Rf8 39.Bf7 a2 40.h5 a1Q 41.Kh2 Qf1 42.Qg3 Bd6 43.Bd5 Qdf2 44.Bg2 Qg3) 39.Qf6 gf6 40.Ba2 (40.Kf1 Rd8 41.Be6 Rd2-+) 40...f5! 41.Kg2 (41.gf5 Rd8 Combination) 41...fg4 42.Kg3 Rf8 (better 42...h5 43.Kh2-+) 43.Kg4 Rf2 44.Kh5 (44.Be6-+) 44...Ra2 45.Kg6 (45.Kg4 Rf2 46.Kg3 a2 47.Kg4 a1Q 48.Kh5 Qe5 49.Kg4 Qe2 50.Kg3 Qf3) 45...Rb2 (45...Rf2 46.Kh5 a2 47.Kh6 a1Q 48.Kh5 Qe5 49.Kg4 Rg2 50.Kf3 Rg3) 46.h5 a2 (46...Rf2 47.Kh6 a2 48.Kg5 a1Q 49.Kh4 Rg2 50.h6 Qh1) 47.Kh6 (47.Kf6 Rf2 48.Ke6 a1Q 49.Kd5 Qh1 50.Kc4 Qe4 51.Kb5 Rb2 52.Ka6 Qa8) 47...a1Q 48.Kg6 (48.Kg6 Rf2 49.h6 Qg1 50.Kh5 Rh2; 48.Kg5 Rf2 49.Kh4 Rg2 50.h6 Qh1). danishguy (2060) - Ageless_2 (2150), Rated Bullet game, lichess.org, 2020.

4.e3 c5 5.Bb2 Bd6 6.d3 Nf6 7.c4 d4 8.Nf3 0-0 9.a4 (9.Be2 a4+=) 9...Re8 (9...Qe7 10.Be2+=) 10.Be2 (10.e4 Qe7+=) 10...Qc7 (10...de3 11.fe3 Ng4 12.Qc1+=) 11.0-0 (11.Nbd2 Nbd7+=) 11...de3–/+ 12.Nc3 (12.fe3!? Ng4 13.Qd2–/+) 12...ef2–+ 13.Rf2 e4 14.Ne4 Ng4 (14...Ne4?! 15.de4 Re4 16.Qd5=) 15.Rf1 (15.Nd6 Qd6 16.Rf1 Ne3–/+) 15...Bh2–+ (15...Nh2 16.Nd6 Nf3 17.Bf3 Qd6 18.Bd5+=) 16.Kh1 Bf4 0–1. Cirulis,Ilmars (1815) – Llull,Roger (2245), FICGS, 2016.

4.e3 c5 5.c4 d4 6.ed4 ed4 7.d3 Bd6 8.Nd2 Nf6 9.Be2. combijack (1810) – luisbravo (1785), gameknot.com, 2012.

4.e3 c6 5.c4 (5.Bb2 Qc7=) 5...Be6 6.cd5 cd5 7.Bb2 (7.d4 ed4 8.Qd4 h5=) 7...f6 (7...Nd7 8.Nc3=) 8.Nf3 (8.d4 e4=) 8...Nd7 9.d4 e4 10.Nfd2 Bd6 (10...Rc8 11.Qb3 f5 12.h4=) 11.Nc3 (11.a4 Rc8=) 11...Ne7 12.Rc1 Rc8 13.Qb3 Bf7 (13...f5 14.f3=) 14.Be2 (14.a4 Nf8=) 14...0-0 (14...Nb6 15.h4=) 15.0-0 f5 (15...Nb6 16.Bg4 Nc4 17.Ndb1+= (17.Bc8?? Nd2 18.Qc2 Nf1–+)) 16.Na4 (16.a4 Nf6=) 16...f4 17.Rc8 (17.Bg4 h5 18.Be2 fe3 19.Qe3 b6+=) 17...Qc8 (17...Nc8 18.g3 f3 19.Nf3 ef3 20.Bf3–/+) 18.Bg4 h5 (better is 18...Qc7!? and Black can hope to survive 19.b6 Qd8=) 19.Nb6!+/– Qc7 (19...Nb6 20.Bc8 Deflection Pinning) 20.Nd7 (20.Bd7 Less advisable is 20...fe3 (20...Qb6?! 21.Bh3+=) 21.Qe3 Bh2 (21...Qb6?! 22.g3–/+) 22.Kh1 Bf4–/+ (worse is 22...Qb6 23.g3+=)) 20...hg4 21.Nf8 Kf8?? further deteriorates the position (better is 21...fe3 22.Rc1 Bh2 23.Kf1 Qd6 24.fe3 Kf8+/–) 22.Qc3 ½–½. Corluy,H – Schrickx,Frank (2040), Brasschaat op, 2002.

4.e3 Nd7 A) 5.d4 A1) 5...e4 6.c4 Ndf6 7.Nc3 Be6 8.Nge2 dc4 9.Nf4=; A2) 5...Ngf6 6.c4 ed4 7.ed4 Be7 8.c5 Ne4 9.f3=; A3) 5...Bd6 6.c4 dc4 7.Bc4 Ngf6 8.Nf3 0-0 9.Nc3=+; B) 5.Nf3 Bd6 6.Bb2 Ngf6 7.Be2 c5 8.bc6 bc6 9.Nc3=+; C) 5.Bb2 C1) 5...Bd6 6.d4 Ngf6 7.c4 dc4 8.Nd2 c3 9.Bc3=; C2) 5...Ngf6 6.c4 dc4 7.Bc4 Nb6 8.Be2 Bd6 9.d3=+; D) 5.Be2 D1) 5...Qg5 6.Bf1 Bd6 7.d4 Qg6 8.de5 Be5 9.Ra2=+; D2) 5...Ngf6; D3) 5...Bd6 6.Bb2 Ngf6 7.Nf3 0-0 8.0-0 c5 9.d3=+; E) 5.c4 E1) 5...Nb6 6.cd5 Nf6 7.d4 e4 8.Qc2 Bf5 9.Nf3=; E2) 5...Ngf6 6.d4 dc4 7.Bc4 ed4 8.Qd4 Bc5 9.Qc3=; E3) 5...Ne7 6.d4 dc4 7.Bc4 Nb6 8.Ba2 ed4 9.Nf3=; E4) 5...dc4 6.Bc4 Nb6 7.Be2 e4 8.Nc3 Bf5 9.Qc2=+.

4.Nf3 Bd6 =+.

4.Nf3 e4 5.Nd4 Nf6 6.Bb2 Bd6 7.e3 0-0 8.Be2 c5 9.bc6 bc6 =+.

4.g3 c6 5.Bg2 cb5 6.Nc3 Nf6 7.Nb5 Bc5 (7...Nc6 8.d4 Qb6 9.Rb1 Nd4 10.Be3 Bb4 11.ab4 Qb5 12.Bd4 ed4 13.Nf3=+) 8.e3 (8.d4 ed4 9.Nf3 Nc6=) 8...Bd7 9.a4 (9.Rb1 Be7=+) 9...e4 (9...0-0 10.Ba3 Ba3 11.Ra3=+) 10.Ne2 Bb5 11.ab5 0-0 12.Bb2 Nbd7 13.Bc3 b6 (13...Qb6 14.Qb1=+) 14.0-0= Re8 15.Nd4 Bd4 16.Bd4 Rc8 (16...a4 17.f3=) 17.f4 Nc5 18.Ra2 Ne6 19.Ba1 Rc5 20.g4 (20.Qe2!?=) 20...Rb5=+ 21.g5 Nd7 22.Qh5 f6?? (22...Rc5 23.d3–/+) 23.Bh3?? (better is 23.gf6 Nf6 24.Bf6 gf6 25.Be4+/–) 23...d4 24.ed4?? (better is 24.Be6 Re6 25.Qe2=+) 24...Nf4!!–+ 25.Rf4 Rg5 (26.Qg5 fg5–+) 0–1. kingscrusher – bcholy, ChessWorld.net, 2005.

5.e3 c5 6.a4 Nf6 7.Na3 Nbd7 8.Nc4 Be7.

5.e3 c5 6.bc6 Nc6 7.Nf3 (7.Qe2 Be7=) 7...Bd6 (7...Qb6 8.Qc1=+) 8.Bb5 (8.ed4 Qb6 9.Nc3 Nd4 10.Nd4 Qd4+=) 8...Nge7 (8...de3 9.de3 Qe7 10.Nc3=) 9.ed4+= ed4 10.Nd4 0-0 11.Nc6 (11.Nf3 Qb6 12.c4 Na7+=) 11...Nc6 12.0-0 Qh4 13.g3 Qg5 14.a4 (14.c4 Bc5+=) 14...Bh3= 15.Re1 Rae8 16.Bf1 (16.Nc3 Bg4 17.Be2 Be2 18.Re2 Re2 19.Qe2 Nd4+=) 16...Re1 17.Qe1 Bf1 18.Qf1 Be5 (better 18...Qf5=) 19.Nc3?? (19.Qb5 Qf6 20.c3 Rb8+=) 19...Nb4?? (better 19...Qd2!? 20.Nd1 Qc2-/+) 20.Qd1 (20.Qb5 Nc2 21.Ne4=+) 20...Qf5 21.Ba3 (better 21.d3!?=) 21...Rd8-/+ (21...Nc2?! 22.Bf8 Bd4 23.Qe2 Na1 24.Bd6=) 22.Bb2 (better 22.Qe2 Nc2 23.Ra2-/+) 22...Nd5?? (better 22...Bd4 23.Qf1 Qc2-/+) 23.Qe2 (23.Nd5!? Rd5 24.Rb1+=) 23...Nc3 (worse 23...Qc2 24.Qe5 Qb2 25.Rb1+/-) 24.Bc3 Bc3 25.dc3 h6 (25...Qd7 26.Qb5 Qc7 27.c4+=) 26.Rb1 Qd5 27.Rb5 Qd1 28.Qd1 Rd1 29.Kg2 Rc1 (better 29...b6!?+/-) 30.Ra5+- (30.Rb7?! Ra1+=) 30...Rc2 31.Rc5 (31.Rb5 Ra2+-) 31...b6+/- 32.Rc6 g6 (32...Rb2 33.Rc8 Kh7 34.Rb8+/-) 33.Kf3 (33.Rb6 Rc3 34.a5 Ra3+-) 33...Kg7 34.Ke3 Ra2 35.Rc4 h5 36.h4 Kf6 37.Rf4 Ke6 38.Kd3 Ra3 39.Rb4 Kd7 40.Kc4 Kc7 41.Kd3 Ra2 (41...Kd7 42.Rb6 Ra4+/-) 42.Rf4 f5 43.Ke3 Ra3 (43...Rc2 44.Rc4 Kd6 45.f3+/-) 44.Rc4 Kd6 45.Kf4 Ra2 46.Kg5 Rf2 47.Kg6 Rf3 48.Kh5 Rg3 49.Rb4 Kc6 (49...Ke5 50.Rb5 Ke4 51.c4+-) 50.Rf4 Rc3 51.Rf5 Ra3 52.a5?? (better 52.Rf4+-) 52...ba5= (52...Ra5 53.Kg6 Rf5 54.Kf5=) 53.Kg6 a4 54.h5 Kb6?? (better 54...Rg3 55.Kf6 a3=) 55.h6+- Rg3 56.Rg5 Rh3 (56...Rh3 57.h7 Rh7 58.Kh7 Ka6+-). minhntq (2215) - bjagus (1755), lichess.org, 2013.

5.e3 c5 6.d3 Nf6 7.Nf3 Bd6 8.Be2 (8.Nbd2 Be6) 8...Nbd7=+.

5.e3 c5 6.ed4 ed4 7.c3 (7.Nf3 Bd6 8.c3 Nf6) 7...Qe7 (7...d3 8.Qf3 c4) 8.Qe2 Nf6+=.

5.e3 c5 6.Nf3 Bd6 7.ed4 ed4 8.c3 Nf6.

5.e3 Bd6 6.ed4 ed4 7.Bd4 Nf6 8.Nf3 0-0.

5.e3 Nf6 6.Nf3 Bd6 7.ed4 e4 8.Ne5 0-0.

5.e3 Nh6 6.Bd3+= Bc5 (6...Bd6 7.ed4 ed4 8.Qe2 Be6) 7.Nf3 0-0 (7...Qf6!?= 8.ed4 ed4) 8.Ne5+- de3 (8...Nd7 9.Nf3 (worse 9.ed4 Ne5 10.de5 Ng4–/+) 9...de3 10.de3+-) 9.de3 Qg5 (9...Nd7!? 10.Nd7 Bd7+-) 10.Nd2+- Qg2 11.Be4 Qh3 (11...Qg5 12.Bd5 c6 13.Ne4+-) 12.Ndf3 f6?? (12...Ng4 13.Ng4 Bg4+-) 13.Qd5 Be6 (13...Nf7 14.Nf7 Rf7 15.Qc5+-) 14.Qc5 fe5 (14...Nd7 15.Nd7 Bd7+-) 15.Bh7! Kh7 16.Ng5 (16.Ng5 Kg8 17.Qe5+-) 1–0. Pierre – Wewte, internet, 2020.

5.Nf3 Bd6 6.c3 c5 7.cd4 ed4 8.e3 Nf6.

5.Nf3 Bd6 6.e3 c5 7.bc6 de3 8.fe3 (8.de3 Nc6 9.Nc3 Qe7=) 8...Nc6= (worse is 8...bc6 9.Be5 Be5 10.Ne5+/–) 9.Bc4 (9.Bb5 Bd7=) 9...e4+= 10.Bg7 ef3 11.g3 Bg4 (better is 11...Qg5 12.Qf3 Qg7–+) 12.Qc1–/+ Be5 13.Bh8 Bh8 14.d4? (14.c3 Qd7 15.d4 Nf6–/+) 14...Qf6 (14...Bd4 15.c3 Bc5 16.h3–+) 15.Kf2 (15.Qb2–/+) 15...Qh6 (better is 15...Nd4!? 16.c3 Nf5–+) 16.h3 (16.c3 Bh3 17.Bf1 Nf6 18.Bh3 Qh3 19.Kf3 Qh5 20.Kg2 Qe2 21.Kg1 Ne4–/+) 16...Bf5+= 17.Qb2 (17.Qd1 Nf6 (17...Bh3 18.Bf1+/–) 18.Nc3 Rc8 (18...Bh3?! 19.Qf3 Qg6 20.Bd3 Ng4 21.Ke1=) 19.Qf3 Ne7–/+ (worse is 19...Bc2 20.Rhc1 Bg6 21.Kg2+=; 19...Bh3? 20.Nb5+-)) 17...0-0-0–/+ 18.c3 (18.Kf3?? Nd4! 19.Kf2 Nc2–+) 18...Re8 (18...Bh3? 19.Bf1 Qg5 20.Bh3 (20.Rh3?! Nf6 21.Kf3 Ng4+/–) 20...f5 21.Nd2+-) 19.Qd2 (better is 19.Qc1 Nf6 20.Kg1–+) 19...Nf6 (19...Bh3? 20.Bf1+-) 20.Bd3 (20.Qe1 Bh3 21.Kf3 Ng4 22.Rh3 Qh3–+) 20...Be4 (20...Bd3 21.Qd3 Ne4 22.Kg1 f2 23.Kg2 Ng3 24.Rd1–+) 21.Qd1 (21.Rf1–+) 21...Bd5 (better is 21...Bd3 22.Qd3 Ne4 23.Kg1 f2 24.Kg2 Ng3–+) 22.Qe1–/+ Be6 (22...Nh5!? 23.Rg1 Qe6–/+) 23.Nd2= Ne7 (23...Bg7 24.Nf3 Bh3 25.Bf5 Bf5 26.Rh6 Bh6 27.Kg2 Re3 28.Qh1 Re2 29.Kf1–+) 24.Nf3 Ng6 (24...Bf5!? 25.Qe2 Qg6 (25...Bh3? 26.Ng1+-) 26.Bf5 Nf5–/+) 25.c4+/– Bd7 26.Rb1 Kb8 (26...a4 27.e4 Bh3 28.e5 Ne5 A) 29.Ne5 Ng4 30.Kg1 Be5 (worse is 30...Ne5 31.de5 Re5 32.Be4+/–) 31.de5 Re5 32.Bf5 Kb8–/+ (32...Rf5 33.Qe8 Kc7 34.Qe7 Kc6 35.Qb7 Kc5 36.Qb4 Kd4 37.Rd1 Ke4 38.Qb1 Ke5 39.Qb2 Ke4 40.Qd4 Kf3 41.Rd3 Qe3 42.Re3 Ne3 43.Rh3 Ke2 44.Rh2 Ng2 45.Rg2 Kf3 46.Rf2 Kg3 47.Qg7 Rg5 48.Qg5 Kh3 49.Rf3); B) 29.de5 Ng4 30.Kg1 Ne5 31.Ne5 Re5 32.Be4+/–) 27.Rb6 (27.e4 Bf5 28.Rb7 Kb7 29.Qa5 Ne4 30.Be4 Be4 (30...Re4?? 31.Rb1 Kc6 32.Qa8 Kd7 33.Rb7 Kd6 34.Qa6) 31.Qb5 Kc7 32.Qe8 Bd4 33.Nd4 Qd2 34.Ne2 Bh1 35.Qf7 Qd7 36.Qd7 Kd7=) 27...Bh3 (27...a4!?+=) 28.Rf6+/– Bf6 29.Bf5 (better is 29.Bf1 Bg5 30.Ng5 Qg5 31.Rh3+/–) 29...Qf8? (29...Bg5 30.Rh3 Be3 31.Kf1 Qg7+-) 30.Rh3+- Qa3 31.Qd2 (31.Rh7 Re7+-) 31...Qb3 (31...Rh8 32.e4+/–) 32.Qd3 (32.Rh7 Qc4 33.Qa5 Qb3+-) 32...Qb2 33.Qc2 Qa3 34.Qd3 Qb2 35.Qe2 Qc3 (35...Qe2 36.Ke2 Nf8 37.Bh7+-) 36.Rh7 Re7 37.Bg6 fg6 38.Re7 Be7 39.Ne5 g5 40.Qd3 (40.Qa2 Ka7+-) 40...Qd3+/– 41.Nd3 a4 42.Nc1 Ba3 (42...Kc7 43.Kf3+/–) 43.Na2+- Bb2 (43...Be7 44.e4+-) 44.Kf3 Kc7 45.Kg4 b5 46.cb5 Kb6 47.Kf5 (47.Kg5!? Kb5 48.d5 Kc4+-) 47...Kb5 48.Ke6 (better is 48.d5+-) 48...a3? (better is 48...Ba3 49.Nc3 Kc4 50.Na4 Kd3+-) 49.d5 Kc4 (49...g4 50.d6 Kb6+-) 50.d6 Kb3 51.d7 Ka2 52.d8Q Kb1 53.Qd3 Kc1 54.Qb3 Kb1 55.Qd3 Kc1 56.Qf1 Kd2 57.Qb1 (57.Qf2 Kc3 58.Qf6 Kb3 59.Qg5 a2 60.Qd5 Ka3 61.Qa5 Kb3 62.Qa2 Ka2+-) 57...Ke3 58.Kf5 Kf3 (58...g4 59.Kg4 Kd4 60.Kf5+-) 59.g4 (59.Qd3!? Kf2 60.g4 Kg2+-) 59...Ke3 60.Kg5 Kd2 61.Kf5 Kc3 62.Qa2 1–0. Swartz,David (1940) – Jacobs,Cavan (1695), Arnold Classic, 2016. (=1.a3 e5 2.b4 a5 3.b5 d5)

5.Nc3 Nf6 6.d4 (6.e3 0-0=+) 6...e4 7.e3 (7.Na4 0-0–/+) 7...0-0 8.a4 (8.Nge2 Bg4–/+) 8...Be6 (8...Bg4 9.Be2 Be6 10.Ba3–/+) 9.Nce2. gdraper (1715) – bobamback (1950), net–chess.com, 2006.

5.c4 d4 6.e3 c5 7.d3 Nd7 8.Nf3 Nh6 (8...Ne7 9.Be2 (9.Nbd2 Nf6 10.e4 0-0 11.Be2 Ng6 12.0-0 Nf4 13.Bc1 Qd7+=) 9...Nf5 10.Qd2 0-0 11.0-0 Qf6 12.Bc1 de3 13.fe3 e4+=; 8...Ngf6 9.Be2 0-0 10.0-0 Re8 11.Qc2 Qe7 12.Bc1 Qe6 13.Re1 Rd8+=; 8...a4 9.Be2 (9.Nbd2 Ngf6 10.Be2 0-0 11.Rb1 Re8 12.Nh4 Nf8 13.0-0 e4+=) 9...Ngf6 10.0-0 0-0 11.Qc2 Re8 12.Re1 Re7 13.Nbd2 Nb6+=) 9.Nbd2 (9.Be2 Nf5 10.Qd2 0-0 11.0-0 Qf6 12.Bc1 de3 13.fe3 e4+=) 9...de3 (9...0-0 10.Ne4 Be7 11.Be2 f5 12.Ng3 de3 13.fe3 f4+=) 10.fe3 f5 11.g3 0-0 (11...Qe7 12.Bg2 0-0 13.0-0 Ng4=) 12.Bh3 (12.Bg2 Qe7 13.0-0 Ng4=) 12...Nf6 (12...g5 13.Bg2 g4=) 13.0-0 (worse is 13.Be5 Be5 14.Ne5 Re8–/+) 13...Nfg4 (13...Nhg4+=) 14.Qe2 Qe7 (14...Ne3 15.Qe3 f4 16.gf4 Bh3 17.fe5 Bf1 18.ed6=) 15.Rae1= Ne3 16.Qe3 e5 becomes the focus of attention 16...f4 17.gf4 Bh3 18.fe5 Rae8 (18...Bf1 19.ed6 Qe3 20.Re3 Nf5+/–) 19.Qe4 (worse is 19.ed6 Qe3 20.Re3 Re3–+) 19...Bf1 20.Qd5 Qf7 21.Kf1 (21.Rf1 Bb8+=) 21...Bb8 22.Kg2 Rd8 23.Qf7 Rf7 (worse is 23...Nf7 24.d4 Rfe8 25.d5+/–) 24.Ne4 Rf5 25.e6 Re8 (25...Rd3 26.e7 Rff3 27.e8Q Rf8 28.Qe6 Nf7 29.Rg1+-) 26.Ng3 Rf4 27.h3 Rff8 28.Bc3 Nf5 29.Nf5 Rf5 30.Re4 a4 31.Bb2 Kf8 32.d4 cd4 33.Nd4 (33.Bd4 Bd6 34.Bb2–/+) 33...Rf4–/+ (33...Rf4 34.Rf4 Bf4–/+) 0–1. marekt (2060) – forsetinn (2215), gameknot.com, 2014.

5.c4 d4 6.e3 c5 7.d3 Nf6 8.Be2 0-0 9.e4 Nbd7 10.a4 Re8 11.Nd2 Nf8 12.Ngf3 Ng6 13.g3 h6 14.Bf1 Be6 15.Bg2 Qd7 16.0-0 Bh3 17.Bh3 Qh3 18.Re1 Nh5 19.Qe2 b6 ½–½. Fournier,Frederic (2380) – Scoul (2500), echecsemail.com (team), 2009.

5.d4 e4 6.e3 a4 7.c4= c6 (7...dc4 8.Nc3 Qg5 9.Qc2=) 8.c5 Bc7? (better is 8...Be7!?=) 9.b6+/– Bb6 10.cb6 Qb6 11.Qc2 (11.Bc3 Qd8+/–) 11...Nf6+/– 12.h3 0-0 13.Nc3 Qa5 14.Nge2 b5 15.g4 Nbd7 16.Bg2 Nb6 17.0-0 Nc4 18.Rac1 Bd7 19.Nf4 Rab8 20.g5 Ne8+= 21.Nce2 f6 22.h4 b4 23.ab4 Rb4?? 24.Bc3+- fg5 25.Bb4 Qb4 26.hg5 Ned6 27.Nc3 a3 28.Qa2 h6 29.gh6 gh6 30.Rc2 Nf5 31.Ncd5 cd5 32.Nd5 Qd6 33.Qc4 Be6 34.Be4 Rc8 35.Qd3 Rf8 36.Nf4 Bd7 37.Rc5 Nh4 38.Qa3 Qf6 39.Qb3 Kh8 40.Nh5 Nf3 41.Bf3 Qf3 42.Qd5 Rg8 43.Qg8! Kg8 44.Nf4 Bc6 45.Kh2 Bd7 46.Rc7 Bg4 47.d5 h5 48.d6 Kf8 49.Kg1 Ke8 50.Rb1 Qa8 51.Rbb7 Bf3 52.Re7 Kf8 53.Ng6 (53...Kg8 54.Rg7) 1–0. jupiter (2545) – dennism (2385), net–chess.com, 2004.

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

5.d4 e4 6.e3 Nf6 7.h3 c6 8.c4 Be6 (8...dc4 9.Bc4 cb5 10.Bb5 Bd7 11.Qa4+=) 9.Qa4 (9.c5 Be7=) 9...dc4+= 10.bc6 Nc6 11.Nd2 0-0 12.Bc4 Qd7 13.Ne2 Bc4 14.Nc4 Bc7 15.Nc3 Rfd8 16.0-0 Qe6 17.Nd2 Qd6 18.g3 Qe6 19.Kg2 Ra6 20.Rab1 Re8 21.Ba1 Nd8 22.d5 Increases the pressure on e4 22...Qf5 (22...Qe7 23.Rfd1+=) 23.Nb5+/– Qd7 24.Nb3 Bb6 (24...Nd5 25.Nc5 Qc6 26.Na6 A) 26...Qa6?? 27.Qd4 (27.Nc7?! Nc7 28.Rfc1 b5+-) 27...Ne3 28.fe3+-; B) 26...ba6+/–) 25.Bf6 gf6 26.Nc3 Qa4 27.Na4 Re5 28.Rfd1 Ba7 29.Rbc1 b5 30.Rc8 ba4 31.Rd8 Kg7 32.Nd2 Bc5 33.Nc4 1–0. nuclearowl (2005) – memco286 (1910), gameknot.com, 2013.

5.e3 Nd7 6.Nf3 Ngf6 7.d4 ed4 8.Nd4 0-0 9.c4 Re8 10.Nc3 dc4 11.Bc4 Nb6 12.Be2 Qe7 13.0-0 Be6 14.Ne6 Qe6 15.Qc2 Rad8 16.g3 Nc4 17.Na4 (17.Bc4 Qc4 18.Rfd1 Qe6=) 17...Ne3=+ 18.fe3 Qe3 19.Rf2 Ne4 20.Raf1 Bg3 (better 20...Nf2!? 21.Rf2 Re7=+) 21.hg3+/- Rd2? (21...Qg3 22.Rg2 Qe3 23.Rff2 Nf2 24.Rf2 Rd5=) 22.Qc7+- Nf2 23.Rf2 Kf8 (23...f6 24.Bc1 Qf2 25.Kf2 Ree2 26.Kf3 Rf2 27.Kg4 Rd4 28.Bf4 Rff4 29.gf4 Ra4+-) 24.Qf7 1-0. Sevian,Samuel (2665) - Nihal,Sarin (2595), chess.com Junior Speed, 2019.

5.e3 Be6 6.Nf3 Nd7 7.d4 e4 8.Nfd2 f5 (8...Nb6!?–/+) 9.c4= Ngf6 10.Nc3 c6 11.a4 (11.c5 Be7=) 11...f4 (better is 11...0-0 12.g3 Ng4–/+) 12.Be2?? (12.c5 Bc7 13.ef4 Bf4 14.g3–/+) 12...fe3–/+ 13.fe3 Qb8 (13...Ng4 14.Nf1 Qh4 15.g3 Qh3 16.bc6 bc6 17.cd5 cd5 18.Nd5 Qg2 (18...Bd5?! 19.Bg4 Bb4 20.Kf2 0-0 21.Kg1 Rf1 22.Qf1 Qg4 23.Kg2–+) 19.Bg4 Bd5 20.Bd7 Kd7 21.Qg4 Ke8–+) 14.g3?? (better is 14.cd5 cd5 15.Qb3=) 14...Bg3!–+ 15.hg3 (15.Kf1 Bh3 16.Kg1–+) 15...Qg3 16.Kf1 0-0 (16...0-0 17.Qe1 Bh3 18.Rh3 Ng4 19.Bf3 Rf3 20.Ke2 Re3 21.Kd1 Re1 22.Kc2 Ne3 23.Kb3 dc4 24.Nc4 Qh3 25.Re1 Nc4–+) 0–1. Zhukov,Vladimir (1930) – Smolskiy,Mikhail (1940), Memorial E. Sinitsin, 2010.

5.Nf3 Qf6 6.e3 (6.d3 Ne7 7.c4 d4 8.Nbd2 Bf5 9.g4 Bg6=) 6...Be6 7.d4 e4 8.Ne5 Qf5 9.c4= Nf6 =.

5.f4 Nd7 6.Nf3= f6 7.Nc3 Ne7 8.e4 d4 (8...ef4 9.ed5 Nb6 10.Nd4=+) 9.Nd5 (9.Na4!?=) 9...Nd5-/+ 10.ed5 0-0 11.Bd3 (11.Bc4!?-/+) 11...e4!-+ 12.Be4 Re8 13.d3 f5 (13...Bf4?! 14.0-0 (14.Bd4? f5-+) 14...Nc5 15.Nd4 Be3 16.Kh1 Ne4 17.de4 Re4 18.c4=) 14.Nd4 fe4 (14...Nf6 15.Nf5 Bf5 16.0-0 Be4 17.de4 Bc5 18.Kh1 Ne4 19.Qg4-+) 15.Ne6-/+ Qe7 16.de4 Nf6 (16...Nb6 17.e5 Be6 18.de6 Qe6 19.Qf3-+) 17.e5 Be6 (17...Nd5 18.Ng7 Bb4 19.ab4 Qb4 20.Qd2 Qb2 21.Ne8 (21.Qd5 Kg7 22.0-0 Qc3-/+) 21...Qa1 22.Kf2+/-) 18.de6 (18.ef6!? gf6 19.de6 Qe6 20.Kf2 Bf4 21.Re1 Be3 22.Kg3=+) 18...Qe6-/+ 19.0-0? (better 19.Qf3 Bc5 20.0-0-0=+) 19...Bc5-+ 20.Kh1 Ne4 21.Qe2?? (21.Qf3 Nd2 22.Qc3 Nf1 23.Qc5-+) 21…Ng3!! (21...Ng3 22.hg3 Qh6 23.Qh5 Qh5) 0-1. black_bishop_88 (2540) - pawel94 (2575), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.b5 d5 4.Bb2 Bd6)

5.f4 ef4 6.Bg7?? (better 6.Nf3 Nf6 7.Bd4-+) 6...Qh4 7.g3 fg3 8.Bg2 gh2 9.Kf1 Nf6 10.Nf3 (10.Bh8?? hg1Q 11.Kg1 Qd4 12.e3 Qa1 13.Bd5 Qe5 14.Bf6 Qd5 15.Rh7 Qb5-+) 10...Qf4?? (better 10...Qg3 11.Bf6 Rg8 12.Rh2 Qg6-+) 11.Bh8+- Ne4 12.e3?? (12.Rh2!? Qg3 13.Qe1 Qg6+-) 12...Ng3 (12...Qg3 13.Qe1 Bh3 14.Qg3 Ng3 15.Kf2 Ne4 16.Kf1 Ng3 17.Kf2 Ne4 18.Kf1 Ng3=) 13.Kf2 (better 13.Ke1 Qg4 14.Nc3 (worse 14.Rh2 Ne4-/+) 14...Nh1 15.Bh1+/-) 13...Ne4= 14.Ke2 (better 14.Kf1!? Qg3 15.Qe1=) 14...Qg3-/+ 15.Qf1 (better 15.Rh2 Qf2 16.Kd3 Bh2 17.Qf1-/+) 15...Bg4?? (better 15...Qg8 16.Kd1 Qh8-+) 16.Nc3 (16.d3 Be5 17.Be5 Qe5 18.de4 de4+-) 16...Nc3? (better 16...Be5 17.Be5 Qe5+-) 17.Bc3 Nd7 18.Kd1 (18.Qf2 Nc5 19.d3 c6+-) 18...Nc5 (18...Ne5 19.Be5 Qe5 20.c3+-) 19.Kc1 Ne4 (19...Bf3 20.Bf3 Ne4 21.Be4 de4 22.Qc4+-) 20.Nd4 (20.Nh2 Bd7 21.Bb2 0-0-0+-) 20...0-0-0? (20...Qf2+-) 21.Nf5 (worse 21.Ba5 Nf2 22.Rh2 Qh2 23.Qf2 h5+-) 21...Bf5 22.Qf5 Kb8 23.Qf3 (better 23.Be4!? de4 24.Qe4 Qg5+-) 23...Qg6? (23...Rg8 24.Qg3 A) 24...Bg3? 25.Be4 (25.Ba5?! Be5 26.d4 Rg2 27.de5 Nf2+-) 25...de4 26.Ba5+-; B) 24...Ng3+/-) 24.Qh3 (better 24.Ba5 Rg8 25.Bf1+-) 24...Nf2 25.Qf3 Nh1?? (better 25...Ne4=) 26.Bh1+- Rg8?? (26...Qe4 27.Qe4 de4 28.Be4+-) 27.Kb2 (better 27.Qd5 Kc8 28.Qb7 Kd7 29.Bc6 Ke7 30.Ba5+-) 27...c6 28.bc6 bc6 29.Rb1 Kc7 30.Ka2 (30.a4 f5 31.Ba5 Kd7+-) 30...Qe6? (better 30...Qc2 31.Rb2 Qg6+/-) 31.Rf1?? (better 31.Ba5 Kc8 32.Qe2+-) 31...d4= 32.Kb1 Rb8 (32...dc3 33.Qc6 Kd8=+) 33.Kc1?? (33.Bb2 Ba3 34.Qg3 Bd6+=) 33...dc3?? (33...Ba3 34.Kd1 dc3 35.Qf4 Bd6 36.Qf7 Qf7 37.Rf7 Kd8 38.Bc6 Rb1 39.Ke2-+) 34.Qf7?? (better 34.Qc6 Kd8 35.Qc3=) 34...Qf7-+ 35.Rf7 Kd8 36.dc3 Ba3 37.Kd2 Be7?? (37...Rb1 38.Bc6 h1Q 39.Bh1 Rh1 40.Ra7-+) 38.Rf1? (38.Rh7!? Bd6 39.Bc6-/+) 38...Kc7 (better 38...Kd7-+) 39.Rd1? (better 39.Rf7 Rd8 40.Ke2-+) 39...Rd8 40.Ke2 Rd1 41.Kd1 Bd6 (41...Bg5 42.Kc1-+) 42.Kc1 a4 43.Kb2 a3 44.Kb3 Kd7 45.c4 h5 46.c5 Bc5 47.e4 Bd6 48.c4 Bc5 49.Ka2 Kd6 50.Kb3 Ke5 51.Ka2 Kf4 52.Kb3 h4 53.e5 Ke5 54.Bc6 Kf4 55.Bh1 Kg3 56.Ka4 (56.Kc3 Kf2 57.Bd5 h3-+) 56...Kf2 (56...a2 57.Kb5 a1Q 58.Bd5 Qe5 59.Ba8 Qc7 60.Ka4 Qb6 61.Be4 Qb4) 57.Kb5 (57.Kb3 Kg1 58.Bc6-+) 57...a2 (better 57...Be3 58.Kc6-+) 58.Kc5 a1Q 59.Kd6 Qf6 (59...Qh1 60.Ke6 Qc6 61.Kf5 h1Q 62.Kg5 Qhf3 63.Kh4 Qcf6) 60.Kd7 Qf4 (60...Qf4 61.Bd5 h3-+) 0-1. black_bishop_88 (2530) - vvvvvamos (2585), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.b5 d5 4.Bb2 Bd6)

6.c4 0-0 7.cd5 Nd5 8.d4 e4 9.Ne2 f5 (9...Qh4 10.g3 Qg4 11.Nbc3=) 10.Nbc3 Nc3 (10...Nb6 11.Na4 N8d7 12.Nec3=) 11.Qb3 Nd5 12.Qd5 Kh8 13.Qb3 Nd7 14.Nf4 (14.Rd1 a4 15.Qc2 Qe7=) 14...Bf4 15.ef4 Nb6 16.Bc4 Qd6 ½–½. Cirulis,Ilmars (1675) – Reboredo,Daniel (1935), FICGS, 2015.

6.c4 0-0 7.cd5 Nd5 8.Qh5 –/+.

6.c4 dc4 7.Bc4 Nbd7 8.d4 +=.

6.c4 c6 7.Qc2 Nbd7 8.Nf3 Qe7 (8...Qc7 9.cd5 cd5 10.Qc7 Bc7 11.Be2=) 9.Be2 (9.d4 e4 10.Nfd2 0-0=) 9...0-0 10.0-0 a4 (10...dc4 11.bc6 Nb6 12.Bc4 Nc4 13.Qc4 bc6 14.Qc6+=) 11.d4= dc4 12.bc6 bc6 13.Bc4 e4 14.Ne5 (14.Nfd2!?=) 14...Ne5+= 15.de5 Be5 16.Be5 Qe5 17.Nc3 The isolani on a4 becomes a target 17...Ng4 18.g3 Re8 19.Na4 Qh5 20.h4 Ne5 21.Rfd1?? (21.Be2 Bg4 22.Nc3 Be2 23.Ne2 Nf3 24.Kg2 c5–/+) 21...Nf3 (better is 21...Nc4 22.Qc4 Qf3–+) 22.Kg2 Nh4 (better is 22...Qf5!? 23.Rh1 Ne5–/+) 23.gh4= Qf3 24.Kg1?? (better is 24.Kh2 Ra4 25.Bf1–+) 24...Bh3 25.Bf1 Qg4 26.Kh2 Bf1 27.Rf1 (27.f3 Qh4 28.Kg1–+) 27...Qh4 28.Kg2 Qg4 29.Kh2 Re6 0–1. Molotkov,Valentin – Postnikov,Daniil, Tyumen RUS, 2014.

6.c4 c6 7.Qc2 Be6 8.Nf3 (8.c5 Be7 9.Be5 Nbd7 10.Bf6 Bf6+= (worse 10...gf6 11.d4+-)) 8...Nbd7=+ 9.Ng5 Bg4 10.h3 (10.bc6 bc6 11.cd5 cd5=+) 10...Bh5 11.Be2 (11.bc6!? bc6 12.cd5 cd5 13.Nc3-/+) 11...Bg6 Black prepares the advance e4 (11...Be2 12.Ke2 h6 13.Nf3-/+) 12.d3 h6 (12...Rc8 13.bc6 Rc6 14.Nd2-/+) 13.Nf3 e4 (13...Rc8 14.cd5 cd5 15.Qd1-/+) 14.Nfd2 (14.de4 0-0=+) 14...0-0 (14...Nc5 15.de4 Nfe4 16.Qd1-/+) 15.Nc3 Ne5 (15...Nc5 16.de4 Nfe4 17.Nce4 de4 18.0-0-/+) 16.de4 de4 17.0-0-0?? (better 17.Nce4 Ne4 18.Ne4-/+) 17...Nd3-+ 18.Bd3 ed3 19.Qb3 cb5 (better 19...Re8!? 20.Kb1-+) 20.Nb5 Rc8 21.Kb1 Re8 (21...Bc5 22.Bd4-+) 22.g4 (22.Nd6 Qd6 23.Bd4 Re6-+) 22...Ne4 (22...Bc5 23.Bd4 Ne4 24.Ne4 Be4 25.Rhf1 Bd4 26.Nd4-+) 23.Ne4 Be4 (worse 23...Re4 24.f4 (24.Rd3? Rec4 25.Ka2 a4-+) 24...a4 25.Qc3=) 24.Rhg1? (24.Rhf1 Bg6-+) 24...Be5 (better 24...Bh2!? 25.Qc3 Be5 26.Qb3 Bb2 27.Kb2 Qf6 28.Ka2-+) 25.Nd4 Bd4 (25...a4!? 26.Qa4 Bh2 27.Rgf1 d2 28.Ka1-+) 26.Bd4 f6 (26...Qd7 27.g5 h5 28.c5-+) 27.h4 (27.c5 Bd5 28.Qb6 Qb6 29.cb6 Rc2 30.Rd3 Rf2-/+) 27...Re6 (27...Qd7 28.c5 Re6 29.Rd2-/+) 28.g5 hg5 (28...fg5 29.f4-/+) 29.hg5=+ Rd6?? (better 29...f5=+) 30.gf6 (30.c5 Bd5 31.Qb5 Bc6 32.Qc4 Bd5 33.Qd3 f5+-) 30...Rd4+/- 31.Rg7 (31.ed4 Qf6 32.f3 Bf5+=) 31...Kf8 Exerts pressure on the isolated pawn 32.ed4 Qf6 33.Rdg1 (better 33.Rgg1!? Qd4 34.Qb2 Rc4 35.Qd4 Rd4 36.Rg4 d2 37.Kb2+/-) 33...d2+= 34.Ka2 Qg7 35.Rg7 Kg7 36.Qg3 (better 36.Kb2 Rc4 37.Qc4+=) 36...Kf6?? (better 36...Bg6 37.Qe5 Kg8 38.Qe6 Kh7=) 37.Qf4+- Bf5 38.Qd2 Rc4 39.Qh6 Bg6 (39...Kf7 40.Qh5 Kf6 41.f4 Rc2 42.Kb3+-) 40.Qf4 (better 40.f4 Kf7 41.Qg5 Bd3 42.Qa5 Kg6+-) 40...Ke6 (40...Kg7 41.Qe5 Kh7 42.f4+-) 41.Qe5 (better 41.d5 Kd5 42.Qg5 Kc6 43.Qg6 Kc5 44.Qg5 Kb6+-) 41...Kd7 (41...Kf7+-) 42.Qd5 (42.Qd5 Ke7 43.Qc4+-) 1-0. EnRocko (2265) - Valtor (2080), Rated Bullet game, lichess.org, 2015.

6.c4 Nbd7 7.cd5 Nd5 8.Bc4 N5b6 9.Be2 0-0 10.Nc3 Nc5 11.d3 Qg5 12.g3 Qg6 13.Nf3 Bh3 14.Qc2 Rfd8 15.Rd1 Rac8 16.Rd2 Re8 17.Ne4 Ne4 18.de4 Qf6 19.Rg1 Bg4 20.Nh4 Be2 21.Ke2 c6 22.Qd3 Red8 23.Rgd1 Be7 24.Qc3 Rd2 25.Rd2 cb5 26.Qe5 Qe5 27.Be5 Ba3 28.Bd6 Bd6 29.Rd6 Nc4 30.Rd7 a4 31.Rb7 Ra8 32.Rb5 a3 33.Rb1 Na5 34.Nf5 a2 35.Rd1 Nb3 0–1. Fournier,Frederic (1865) – Lagardere (2650), Partie evaluee, 2008.

6.c4 Qe7 7.Nf3 (7.cd5 Nd5 8.Nf3 e4=+) 7...Nbd7 (7...e4 8.Nd4=+) 8.d4 (8.cd5 Nd5 9.Bc4 N7b6 10.Bd5 Nd5=+) 8...ed4 (8...e4 9.c5 ef3 10.Qf3 Nc5 11.dc5 Bc5 12.Bf6 Qf6 13.Qf6 gf6 14.Nc3=+) 9.Qd4 Nc5 (9...Nb6 10.Nbd2=) 10.Nbd2 (10.Qh4 Be6=) 10...Be6 11.Be2 dc4 12.Bc4 Bc4 13.Qc4 Rd8 14.0-0 0-0 15.Rfd1 Rfe8 16.Bc3 a4 17.Nd4 Qe5 18.N2f3 Qh5 19.Ne2 Nfe4=+ 20.Ng3 Ng3–/+ 21.hg3 Re4 22.Qd5 Qd5 23.Rd5 Nb3 24.Nd2 Nd2 25.Bd2 Kf8 26.Bb4= Ke7 27.Rad1 Re6 28.f4 Rc8 29.Kf2? Bb4–/+ 30.ab4 Rd6 31.Re5 Kd7 32.Ra1 Rd2?? 33.Kf3?? Ra8–+ 34.Ra3 Rb2?? 35.Re4 Rb3 (36.Rb3 ab3 37.Rd4 Ke6–+) 0–1. Stejskal,Drahoslav – Siktanc,Petr, CZE–chT1a Czechia, 1995.

6.d4 ed4 7.Qd4 0-0 8.Nf3 c5 9.Qh4 Be7 10.Bd3 Nbd7 11.g4 (11.0-0 Ne4 12.Qg4 Bf6 13.Bf6 Qf6=+) 11...Ne4=+ 12.g5 f5 13.Rg1 (13.gf6 Ndf6 (< 13...Nef6 14.Rg1 d4 15.Ng5+-; 13...Bf6?! 14.Bf6 Ndf6 15.Rg1=+) 14.Rg1 Rf7 15.Be4 Ne4–/+ (< 15...de4 16.Ng5+/–)) 13...Rf7 (13...c4 14.Be2=+) 14.Nc3= Nc3 15.Bc3 Qb6 16.a4 c4 17.Be2 f4 (17...Qe6 18.Nd4 Qd6 19.Qg3=) 18.ef4 Nc5 19.Be5 (19.Bd4 Bf5 20.Kd1 Qc7+=) 19...Bf5 20.Nd4 Be4 (20...Ne4 21.Bg4 Bg4 22.Qg4 Bb4 23.Ke2–/+) 21.Bh5 g6 22.Bg4 Bd6 (better is 22...h5=) 23.Bf6 (23.0-0-0!?+=) 23...Bf4 (23...Re8 24.Kf1 Bf4 25.f3–/+) 24.Kf1 (24.Be2 Qd6 25.Rg4 Be5–/+ (25...Bh2?! 26.f4+=)) 24...Raf8 (24...Re8 25.f3–/+) 25.f3 (25.Rd1 Rf6 (25...Na4? 26.Be6 Nc5 27.Bf7 Rf7 28.Qf4+-) 26.gf6 Qf6 27.Qf6 Rf6–/+) 25...Be3 26.Re1 Bd4 27.Bd4 Bf3 (< 27...Bc2 28.Qf2 Bd3 29.Kg2+/–) 28.Bf3 Rf3 29.Kg2 R3f4 30.Qh6 Qc7 (30...Rd4 31.Re7 Rd2 32.Kh1 Rh2 33.Qh2+-) 31.Bc5 (better is 31.Bf6!? Re4 32.Re4 Ne4 33.Rf1–/+) 31...Qc5–+ 32.Qh3 d4 (32...R4f5 33.Kh1–+) 33.Qe6 Kh8 34.Kh1 d3 35.cd3 cd3 36.Re5 (36.Qd7 Qd4 37.Re7 Qd7 (37...Qa4?? 38.Rh7 Kg8 39.Qg7) 38.Rd7 Ra4–/+) 36...Qc7 37.b6 Qc3 38.Re3 Qd4 (38...Ra4?! 39.Rd3 Qb2 40.Rd7=+) 0–1. Hobert,Sebastian – Rohde,Friedhelm, 2005.

6.Nf3 e4 7.Ne5 0-0 8.f4 ef3 9.Nf3 (worse 9.Qf3 Qe8 10.d4 Nbd7 11.Nd7 Bd7–/+ (11...Nd7?! 12.c4=+)) 9...Bg4 10.Be2 Nbd7 11.0-0 Qe7 12.Qe1 (12.Nc3 Rae8=) 12...Ne4 13.Nc3 Nb6 14.Ne4 de4 15.Nh4 Bd7 16.Nf5 Bf5 17.Rf5 g6 (17...c5 18.a4=) 18.Bf6 Qe6 19.Bg4 (better 19.Rf1=) 19...Nd5–/+ (19...gf5 20.Qh4 Rfc8 21.Qh6 Qf6 22.Qf6 fg4 23.Rf1+-) 20.Rd5 (20.Qh4 Nf6 21.Rf6 Qd5–/+) 20...Qf6 (20...Qd5!? 21.Qh4 Be5–+ (21...Qb5?? 22.Qh6 Bh2 23.Kh1 Qf1 24.Rf1 Be5 25.Qg7; 21...Qd2?? 22.Qh6 Qe3 23.Qe3+-)) 21.Rb1 (21.c3 Rad8 22.Rd4 Qe5=+) 21...Ba3 22.Rd7 Bd6 23.Qe2 a4 24.Qc4 Qe5 25.g3 Kh8 26.Rf7 Rf7 27.Qf7 a3 28.c3 Rf8 29.Qe6 h5 30.Qe5 Be5 31.Be6 Rd8 (31...Ra8 32.Kf1–/+) 32.Ra1 Bd6 33.Bd5 (33.Kf2 c6–/+) 33...Bc5 34.c4 (34.Be4!? Rd2 35.Bg6–/+) 34...c6–+ 35.bc6 (35.Be4 Rd2 36.Kf1–+) 35...bc6 36.Bc6 Rd2 37.Be4 Be3 38.Kf1 (38.Kh1 a2 39.Bg6–+) 38...a2 39.Bb1 0–1. Farrington,Edward J (2010) – Chatalbashev,Boris (2540), 15th South Wales International, 2018.

6.Nf3 Qe7 7.d4 e4 8.Nfd2 0-0 9.c4 c6 10.Nc3 Nbd7 11.g4 Ne8 (better 11...Qe6!?=+) 12.cd5+= cd5 (12...cb5!? 13.Nde4 Ndf6 14.Nd6 Nd6+/-) 13.Nd5+- Qe6 14.Bc4 Qg6 15.h4 h5 (15...Ndf6 16.g5 Nd5 17.Bd5+/-) 16.gh5 Qg2 17.Rf1 Nef6 18.h6! Nd5 (18...gh6 19.Nf6 Double attack) 19.Bd5 Nf6 20.hg7 Kg7 21.Qb3 Bg4? (21...Bh3+-) 22.Bb7 Rab8 23.Bc6 Rfc8 24.d5 Bh5 (24...Rh8 25.Qa4 Bf3 26.Nf3 Qf3 27.Rg1 Kf8 28.Qa5+-) 25.Qc3 Be7 26.Qe5 (worse 26.Qa5 Qg4 27.f3 ef3+-) 26...Bd8 (26...Qg4 27.f3 Qh4 28.Rf2 Bd8 29.Ne4 Bg6+-) 27.Qh5 Rb5 (27...Kg8 28.Qh6 Qg6 29.Qg6 fg6 30.Be5+-) 28.Bb5 Rc2 29.Qg5 (better 29.Bd4 Rc5 30.Ke2 Kg8+-) 29...Kf8 30.Qg2 (30.Qg2 Rb2 31.Bc6+-) 1-0. FeegLood (2145) - Archpawn (2070), lichess.org, 2015.

6.Nf3 Bg4 =+.

6.h3 Nbd7 7.Nf3 Qe7 8.a4 0-0 9.Ba3 Nb6 10.Qc1 Bf5 11.d3 e4 12.Bd6 Qd6 (worse is 12...cd6 13.Nd4 Qe5 14.Qd2=) 13.Nd4 Bg6 14.Qa3 Qe5 15.Nd2 Rfe8 16.Be2 Qg5 17.0-0 Bf5 18.Nf5 Qf5 19.Qc5 Qd7 20.Rfd1 ed3 21.cd3 Qe7 22.Qe7 Re7 23.d4 Ne8 24.Rdc1 Nd6 25.Rc5 f5 26.Bf3 Ne4 27.Be4 fe4 28.Kf1 Rf7 29.Nb3 Raf8 30.Rc2 Nc4 31.Kg1 b6 32.Re2 ½–½. Buck,Klaus Michael (1800) – Virzi,Ettore (1950), Arco op Arco di Trento, 2008.

7.Qc1 Nbd7 8.d4 ed4 9.Bd4 0-0 (9...Qe7 10.cd5 Bd5 11.Nc3=+) 10.c5= Be5 11.Nf3 Bd4 12.ed4 (12.Nd4!? Ne4 13.c6 bc6 14.Qc6=) 12...Re8=+ 13.Be2 Bg4 14.h3 (14.Nbd2!?-/+) 14...Bf3 15.gf3 Nh5 16.Nc3 Re6 (16...Qf6 17.Qd2-+) 17.Qd2 c6 (17...Qf6 18.0-0-0 Nf4 19.Bd3-/+) 18.b6 f5 (18...Qh4!?-/+) 19.h4 Qe8 (19...Qe7 20.Qg5 Qg5 21.hg5=+) 20.0-0-0= Qe7 21.Bd3 Ra6?? (better 21...Nc5 22.dc5 Qc5 23.Bf5 Rf6=+) 22.Ba6+- Ndf6?? (22...ba6 23.Qg5 Qe8+-) 23.Bd3 Nf4 (23...g6+-) 24.Qf4 Nh5 (24...g6 25.Qb8 Qe8 26.Qb7+-) 25.Qg5 (better 25.Qc7 Qe8+-) 25...h6 (25...g6 26.Bf5 Rf6 27.Rhe1+-) 26.Qe7 (better 26.Qh5 Qf6 27.Rhe1 Kf8 28.Re6 Qe6 29.Qf5 Qf5 30.Bf5 g5+-) 26...Re7 27.Bf5 Rf7 (27...g6 28.Bg6 Nf4 29.Rdg1+-) 28.Be6 Nf4 29.Bf7 Kf7 30.Kd2 (better 30.Nb5 Ke6+-) 30...g5 31.hg5 hg5 1-0. petrobbo (1980) - Yorkie (2350), ChessWorld.net, 2019.

7.cd5 Nd5 8.Nc3 Nc3 9.dc3 0-0 10.Bd3 (10.Qf3 c6=+) 10...Nd7–/+ 11.Ne2 (11.Qc2 f5–/+) 11...Qh4 12.0-0 (12.g3 Qh6–/+) 12...e4 13.g3 Qg4 14.Bc2 Ne5 (14...Bc4 15.Nd4 Qg6 16.f3 Bf1 17.Be4–/+) 15.Nd4=+ Nf3 16.Nf3 ef3 (< 16...Qf3 17.Qd4+=) 17.Bd3?? (17.Re1 Rfd8 18.Qd3 Qh3=+) 17...Rad8 (better is 17...Bb3! 18.Bh7 Kh8–+) 18.Re1 Be7 (better is 18...Bc4 19.Bc4 Qc4 20.Qf3 Qb5=+) 19.Qc2 Rd3! 20.Qd3 (20.Qd3 Bc4) 20...Bc4 21.Qd1 Rd8 (22.Qd8 Bd8–+; 21...Bb5?! 22.Qd5 c6 23.h3 Qg3 24.fg3 cd5 25.a4–/+) 0–1. Spiegel,U – Dziggel,H, 1994.

7.cd5 Nd5 8.d4 e4 9.Qc2 f5 (9...Qh4 10.g3 Qg4 11.h3 Qg6 12.Ne2 Nd7=+; 9...Bf5 A) 10.Nd2 0-0 (10...Qh4 11.Nc4 0-0 12.Nf3 Qe7=; 10...Qe7 11.Ne2 0-0 12.Nc3 Nc3=) 11.g4 Bg4 12.Ne4 Bf5=; B) 10.Bc4 Qg5 (10...Nb6 11.Bf1 0-0 12.Nc3 Qe7=) 11.Ne2 Nb6 12.Ng3 Nc4=; C) 10.g4 Bg6 (10...Bg4 11.Qe4 Be6 12.Nc3 c6=) 11.Nd2 Qh4 12.Ne4 0-0=+; D) 10.Nf3 Nd7 (10...0-0 11.Ne5 Qh4 12.g3 Qe7=; 10...Qe7 11.Ne5 Nd7 12.Nd7 Qd7=; 10...Qf6 11.Ne5 0-0 12.Nd2 Be5=) 11.Nbd2 Qe7 12.Nc4 0-0=; E) 10.Nc3 Nc3 11.Bc3 Nd7 12.Ne2 Qe7=) 10.Nc3 (10.Nh3 Nd7 (10...Qh4 11.g3 Qg4 12.Nc3 Qf3=; 10...0-0 11.Nc3 Nd7 12.Nd5 Bd5=) 11.Nc3 N7b6 12.Nd5 Nd5=+; 10.Ne2 c6 (10...0-0 11.Nec3 c6 12.bc6 Nc6=; 10...Nd7 11.Nbc3 Rc8 12.g4 c6=; 10...Qh4 11.g3 Qg4 12.Nbc3 0-0=; 10...a4 11.Nbc3 Nc3 12.Qc3 Nd7=; 10...Nf6 11.Ng3 Qd7 12.Nc3 h5=) 11.Nbc3 0-0 12.bc6 Nc6=+; 10.Nd2 0-0 (10...Nd7 11.Nc4 0-0 12.Rc1 N7b6=+; 10...Qh4 11.Nc4 0-0 12.Rc1 Be7=+; 10...a4 11.Nc4 0-0 12.Nd6 cd6=+; 10...Ra7 11.Nc4 Be7 12.g4 0-0=; 10...Qf6 11.Nc4 0-0 12.Ne2 a4=) 11.Rc1 a4 12.Nh3 c6=+; 10.Bc4 Qg5 (10...a4 11.Nd2 Qg5 12.g3 0-0=+; 10...Nd7 11.Bd5 Bd5 12.Nc3 Qg5=+) 11.Bf1 Qh4 12.g3 Qh5=+) 10...Nd7 (10...Nc3 11.Qc3 Nd7 12.Nh3 Nf6=+; 10...c6 11.Nd5 Bd5 12.Bc4 a4=+; 10...Qe7 11.Nge2 Nb6 12.g4 fg4=; 10...Qf6 11.Nge2 Qf7 12.Nd5 Bd5=; 10...Qd7 11.Rc1 Qe7 12.Nd5 Bd5=) 11.Nd5 (11.Nge2 Rc8 12.g4 c6=) 11...Bd5 12.Nh3 (12.Rc1 0-0=+) 12...a4 (12...0-0 13.Bc4 Bc4 14.Qc4 Kh8 15.Qd5–/+; 12...Rc8=+) 13.Be2 (13.Bc4 Nb6 14.Be2 0-0–/+) 13...Bb3 14.Qc1 (14.Qd2 Nb6=+) 14...Nb6 (14...0-0 15.0-0=+) 15.0-0 (15.Nf4 0-0–/+) 15...0-0 16.Nf4 Bf4 17.ef4 Nd5 18.Re1 (18.Qd2 Rf6=+) 18...Qd6 (18...Rf6 19.g3=+) 19.g3=+ Rfd8 (19...Rf6 20.Qd2=+) 20.f3 (20.Qd2 Re8=+) 20...e3–/+ 21.Bc4 Bc4 22.Qc4 Qe6 23.Rac1 Qe8 24.Rc2=+ Ra5 25.b6 c6 26.Bc1 Rb5 27.Rce2 Qf7=+ 28.Be3 Ne3 29.Qf7= Kf7 30.Re3 Rb6 31.Re5 Kg6 ½–½. Marinelli,Giorgio – Kruse,Raphael, IECG, 2000.

7.cd5 Nd5 8.d4 e4 9.Nc3 A) 9...Qh4 10.Nd5 (10.g3 Nc3 11.Bc3 Qg5 12.Nh3 Qg6= –0.09) 10...Bd5 11.Ne2 a4 12.g3 Qe7=; B) 9...f5 10.Qb3 Nf4 (10...c6 11.bc6 bc6 12.Qb7 Qb6= –0.06; 10...Bg8 11.Bc4 c6 12.Nge2 Qd7+= 0.34; 10...a4 11.Na4 f4 12.Nc5 Bc5+= 0.41; 10...f4 11.Ne4 fe3 12.fe3 Qh4= 0.12) 11.d5 Nd5 12.Bc4 a4=+; C) 9...Nc3 10.Bc3 Bd5 (10...0-0=+ 11.d5 Bf5 12.Ne2 Nd7= –0.19; 10...c6 11.bc6 bc6 12.Ne2 0-0= –0.13; 10...Qg5 11.Qc2 Qd5 12.f3 f5=+ –0.34; 10...Qf6 11.Qd2 0-0 12.Ba5 Rc8= 0.09; 10...f6 11.d5 Bf5 12.Ne2 0-0= 0.00) 11.Qg4 0-0 12.Qf5 c6=+.

7.cd5 Nd5 8.d4 e4 9.Nd2 A) 9...Ne3 10.fe3 Qh4 11.Ke2 Bg4 12.Ngf3 ef3=; B) 9...Bf5 B1) 10.Qc2 Qe7 (10...Qh4 11.Nc4 0-0 12.Nf3 Qe7= –0.03; 10...0-0 11.g4 Bg4 12.Ne4 Bf5= –0.16) 11.g4 Bg6 12.Nc4 Nd7=+; B2) 10.Qh5 g6 (10...Qd7 11.Nc4 0-0 12.Nd6 cd6= 0.00; 10...Qc8 11.Bc4 c6 12.bc6 bc6= 0.22; 10...Ne7 11.Qh4 Nd5 12.Qd8 Kd8 13.Bc4= 0.22) 11.Qe2 Qh4 12.Nc4 Be7=; B3) 10.Bc4 Nb6 (10...c6 11.g4 Bg6 12.Qc2 Nb6= –0.06) 11.Ne2 0-0 12.Ba2 Re8=; B4) 10.Nc4 Qh4 (10...Nd7 11.Ne2 0-0 12.Nd6 cd6= 0.00; 10...a4 11.Ne2 0-0 12.Rc1 Be6= 0.12; 10...0-0 11.Ne2 Nd7 12.Nd6 cd6= 0.00; 10...Be7 11.Ne2 Bd7 12.Ng3 Bb5= 0.09) 11.Qc2 0-0 12.Nf3 Qf6=; B5) 10.Qb3 Nf6 (10...Nb6 11.Qc2 Qe7 12.g4 Bg4+= 0.28; 10...Bf8 11.Ne2 a4 12.Qc2 Bd6+/– 0.72) 11.Nc4 a4 12.Qc2 0-0=; C) 9...f5 C1) 10.Nc4 Be7 (10...0-0 11.Nd6 Qd6 12.Nh3 Nd7= –0.25; 10...Nd7 11.Nd6 cd6 12.Qh5 g6=+ –0.31/12; 10...Qh4 11.Rc1 0-0 12.Ne2 Be7=+ –0.28; 10...Bf8 11.Rc1 Be7 12.Qh5 g6= –0.06; 10...a4 11.Qh5 g6 12.Nd6 cd6=+ –0.28) 11.Qh5 g6 12.Qh6 Bg5=+; C2) 10.Nb3 b6 (10...Qh4 11.g3 Qf6 12.Qc2 Nd7=+ –0.38; 10...Ra7 11.Nc5 Bf7 12.Bc4 Nd7= –0.25; 10...Bf7 11.Nc5 Ra7 12.Bc4 Nd7= –0.25; 10...Qf6 11.Qc2 b6 12.Nd2 0-0=+ –0.53; 10...Nf6 11.Qc2 Bd5 12.Bc4 c6= –0.22) 11.Qh5 g6 12.Qh3 Qd7=+; C3) 10.Ne2 Nd7 (10...0-0 11.Nc4 Nd7 12.Nc3 Be7=+ –0.28; 10...a4 11.Nc3 Nc3 12.Bc3 0-0= –0.16; 10...c6 11.Nc3 0-0 12.Bc4 Qg5=+ –0.38; 10...Qd7 11.Nc3 0-0 12.Nc4 Be7= –0.06; 10...Be7 11.g4 fg4 12.Ne4 0-0= –0.22) 11.Nc3 N7b6 12.Qh5 g6=+; C4) 10.Qh5 g6 11.Qh3 Qf6 12.Rc1 0-0=+.

7.cd5 Nd5 8.Nf3 Nd7 =+.

7.Be2 0-0 8.d3 c5 9.0-0 b6 10.Nbd2 Bb7 11.c4 Rc8 (11...e4 12.Ne1-/+) 12.Re1 (12.cd5 Nd5 13.Nc4 Qe7+=) 12...Bb8 (12...e4 13.Nh4 Be5 14.d4 cd4 15.ed4=+) 13.Nf1 (better 13.cd5!? Nd5 14.g3=) 13...dc4=+ 14.dc4 e4 15.Ng5 h6 16.Nh3 Ne5 17.Ng3 Nd3 18.Bd3 ed3 (18...Qd3 19.Bf6 Qd1 20.Rad1 (worse 20.Red1 gf6 21.Rd7 Be5+=) 20...gf6 21.Rd7+-) 19.Nf5? (19.Nf4 Bf4 20.ef4 Re8=) 19...Be4 20.Ng3 Bh7 21.a4 g5 (21...Re8-/+) 22.Qd2?? (22.f4 Bg6 23.Ra3 Bc7+=) 22...Ne4?? (22...Bg3 23.Qc3 Bb8 24.Qf6 Qf6 25.Bf6 Rfe8-/+) 23.Ne4+= Be4 24.f3 Bf5 25.Nf2 Qd6 26.g3 Rfd8 27.e4 Bg6? (27...Be6 28.Rac1 Qe7 29.Nd3+=) 28.Rad1 (better 28.Ng4 Kf8 29.Nh6+-) 28...Rd7?? (better 28...Bh5 29.Re3 Qe6 30.Rd3 Rd3 31.Qd3 Rf8+-) 29.Qc3+- Qd4 30.Qd4 (better 30.Qb3 Qd6 31.Rd3+-) 30...cd4+/- 31.Rd3 Rc4 32.Red1 (better 32.Ng4 Kf8 33.Red1+/-) 32...Be5-/+ 33.Ng4 Bg7 34.Ra3 h5 35.Ne3?? (better 35.Nf2-/+) 35...de3-+ 36.Rd7 Bb2 37.Re3 Bd4 38.Rd4 Rd4 39.Kf2 (39.Rc3 Ra4 40.Rc6 g4 41.fg4 Be4 42.Rb6 hg4-+) 39...Ra4 40.f4 (40.h4 gh4 41.gh4 Rb4-+) 40...Re4 (better 40...gf4 41.gf4 Re4-+) 41.Re4 (41.fg5 Re3 42.Ke3-+) 41...Be4 42.Ke3 gf4 43.Ke4 (43.gf4 Kg7 44.Ke4-+) 43...fg3 44.hg3 Kg7 45.Kd5 Kg6 46.Kc6 a4 47.Kb6 a3 48.Kc7 a2 49.b6 a1Q 50.b7 Qe5 51.Kc8 Qg3 52.b8Q Qb8 53.Kb8 h4 54.Kc7 h3 55.Kd7 h2 56.Ke7 Black now must not overlook the idea f5 56...h1Q 57.Ke8 (57.Kd6 Qe4 58.Kc5 Qg4 59.Kc6 Qe6 60.Kb5 f5 61.Kb4 f4 62.Kc5 f3 63.Kb5 f2 64.Kc5 f1Q 65.Kb4 Qfc4 66.Ka5 Qea6) 57...Qb7 58.Kf8 (58.Kd8 Kf6 59.Ke8 Qe7) 58…f5 (58...f5 59.Ke8 Qc7 60.Kf8 Qf7; 58...Qe4 59.Kg8 Qe8) 0-1. azer3136 (2295) - sajadianpor (2145), Rated Blitz game, lichess.org, 2016.

8.Nd4 0-0 9.Nc3 (9.cd5 Nd5 10.Nc3 Nc3 11.Bc3 Nb6 12.Qc2 Qe7 13.Be2 Nd5) 9...dc4 10.Bc4 Nb6 11.Bb3 Be5 12.Qc2 Bd4 13.ed4 Bf5.

8.Nd4 Nb6 9.cd5 0-0 10.Nc3 Be5 11.Qc2 Bd4 12.ed4 Bf5 13.Be2 Nbd5.

8.Nd4 Nb6 9.cd5 Nbd5 10.Nc3 0-0 11.Bc4 Nb6 12.Bb3 Be5 13.Qc2 Bd4.

8.Nd4 Nb6 9.cd5 Nbd5 10.Nc3 0-0 11.Nd5= Nd5 12.d3 Qh4 13.g3 Qe7 14.Bg2 f5 15.de4 fe4 16.0-0 a4 17.Qc2 The isolani on e4 becomes a target 17...Re8 18.Rfd1 Ra5 (18...Nf6 19.Rd2=) 19.Qc3?? (better is 19.Qd2 Ra7 20.Nf5 Bf5 21.Qd5 Qf7 22.Bg7 Qd5 23.Rd5 Kg7 24.Rf5+/–) 19…Nc3–+ (19...Nc3 20.Bc3 Ra8–+) 0–1. Fournier,Frederic (1835) – CKR (2080), Active, 2008.

8.Nd4 dc4 9.Bc4 Ne5 (9...0-0 10.Nc3 Ne5 11.Be2 Bg4 12.f3 ef3 13.gf3 Bh5) 10.Qe2 (10.Be2 0-0+= 11.Nc3 Bg4 12.f3 ef3 13.gf3 Bh5) 10...0-0 (10...Nfg4 11.f4 ef3 12.Nf3 0-0 13.Be5 Be5) 11.h3 (11.d3 Nc4 (11...Re8 12.Nc3 Bg4 13.Qc2 Qe7) 12.dc4 Qe7–/+ 13.Nc3 Rd8; 11.Nc3 Bc5 12.f4 Bg4 13.Qf1 Bd4) 11...Nc4 (11...c5 12.bc6 bc6 (12...Qb6 13.cb7 Bb7) 13.f4 (13.Nc3 Rb8) 13...ef3 14.Nf3–+; 11...Nfd7 12.0-0 Nb6 13.d3 Qg5) 12.Qc4 Re8 (12...Qe7 13.Nc3 Qe5) 13.Nc3 Nd7 (13...Re5 14.d3 Rc5 15.Qa4 ed3 16.Rd1+=) 14.Qe2 (14.0-0!?+=) 14...Nc5–/+ 15.0-0 Nd3 16.Rab1 (16.Rfb1 Qe7–/+) 16...Nb2 17.Rb2 Ba3 18.Rc2 (18.Ra2 Bc5–/+) 18...Bc5–+ 19.Qc4 (19.d3 ed3 20.Qd3 a4–+) 19...Bd4 20.ed4 Bf5 21.Rb2 Qd6 (21...Re6 22.Nd5 c6 23.Ne3–+) 22.Qd5 (22.Re1 h6–+) 22...Qg6 23.Ne2 (23.Kh1 b6–+) 23...Bh3 24.Nf4 Qf5 25.Qf5 Bf5 26.Rc1 Rac8 27.Rc5 Bd7 28.Nd5 b6 29.Rc7 Rc7 30.Nc7 Rb8 31.Nd5 Kf8 32.Nc3 f5 33.Kf1 Ke7 34.Ke2–/+ Kd6 35.d3 ed3 36.Kd3 Be6 37.f3 h5 38.Rb1 h4 39.Rh1 Rh8 40.f4 Bd5 41.Rh2 Rh6 42.Nd1 Be4 43.Kc3 Rh8 44.Ne3–/+ Rc8 45.Kd2 a4 46.Rh1? h3! 47.Rh3 a3 48.Rh1 a2 49.Ra1 Bb1 50.g3 g6 51.Kd1 Rc3 52.Ke2 Rb3 0–1. Serdijn,GO (2095) – Barua,Dibyendu (2450), HZ Open, Vlissingen NED, 2006.

8.Bf6 A) 8...Qf6 9.Nd4 dc4 (9...Nc5 10.Nc3 dc4 11.Qh5 Be6 12.Nd5 Bd5 13.Qd5 c3) 10.Nc3 Qg6 11.Qc2 Nc5 12.Bc4 0-0 13.Kf1 Re8; B) 8...Nf6 9.Nd4 dc4 (9...Be5 10.Nc3 dc4 11.Qa4 Bd4 12.ed4 Qd4 13.Bc4 Qd6) 10.Nc3 Be5 11.Bc4 Bd4 12.ed4 Qd4 13.Qa4 Qd6.

6.c4 c6 7.e3 Ngf6 8.c5 Nc5 9.Be5 Be5=.

6.e3 c5 7.c4 d4 8.d3 f5 9.Be2 (9.Qe2 Ne7–/+) 9...Ngf6 10.Nh4 Nb6 11.0-0 0-0 12.g3 (12.ed4 ed4 13.Nd2 Qc7–/+) 12...g5 Black plans f4 (12...de3 13.fe3 f4 14.Nc3=+) 13.Ng2 f4 14.Nd2 Bh3 15.gf4 gf4 16.Bf3 (16.ed4 ed4 17.Bf3 Qc7–/+) 16...Rf7 (16...fe3 17.fe3 Qd7 18.Kh1–/+) 17.ef4 (17.ed4 ed4 18.Kh1 Rg7=+) 17...Kh8 (17...Rg7 18.Kh1 ef4 19.Rg1=+) 18.Kh1 (18.Ne4 Rg7 19.Nd6 Qd6–/+) 18...ef4 19.Rg1 Qf8 20.Bc1 (20.Qb3 Rg7 21.Rae1 Ng4 22.Bg4 Rg4–/+) 20...Rg7–/+ 21.Ra2 (21.Ne4 Ne4 22.Be4 Re8–/+) 21...Qf7 22.Ne4 Ne4 23.Be4 Re8 24.Bf3 Reg8 25.Rc2 (better 25.Bd2!?–/+) 25...Nd7–+ 26.Bd5? (26.Be4–+) 26...Qd5!! 27.cd5 (27.cd5 Rg5 Double attack (27...Rg5 Decoy)) 27...Rg2 28.f3 (28.Bd2 Ne5 (worse 28...Rg1 29.Qg1 Rg1 30.Kg1–+) 29.Bf4 Rg1 30.Qg1 Rg1 31.Kg1 Nf3 32.Kh1 Bf4 33.Rc5 Ne1–+) 28...Rg1 29.Qg1 Rg1 30.Kg1 Bf5 0–1. Domingo,Jordi (1950) – Boehme,Sebastian (2275), FICGS, 2010.

6.e3 c5 7.d3 f5 8.Be2 Ngf6 9.e4 fe4 10.de4 Nb6 (10...d4 11.Nbd2+=) 11.Nbd2 (11.ed5!? Nbd5 12.Nc3 Nc3 13.Bc3+=) 11...0-0+= 12.0-0 c4 (12...d4 13.c3+=) 13.c3 (worse is 13.Ne5 c3 14.Bc3 Qc7 15.ed5 Qc3–+ (15...Be5?! 16.Be5 Qe5 17.c4+=; 15...Nbd5?! 16.Bc4 Kh8 17.b6 Nc3 18.bc7 Nd1 19.Nf7 Rf7 20.Bf7–/+)) 13...Qc7 14.Qb1 Bg4 15.h3 (15.ed5 Nfd5 16.Ng5 Bf5+=) 15...Bh5 (15...Bf3 16.Bf3 d4 17.a4+= (17.cd4? c3–+)) 16.Bd1 (16.ed5 Rae8 17.Ne4 Ne4 18.Qe4 Bg6–/+) 16...de4+= 17.Ng5 e3 18.fe3 Bg6 19.Bc2 Qc5 20.Bg6 (20.Rf3 e4 (20...Qb5 21.Bg6 hg6 22.Qg6+-) 21.Nde4 Be4 22.Ne4 Ne4 23.Be4 Rf3 24.gf3 Nd5–/+) 20...Qe3–/+ (20...hg6?! 21.Re1 Qd5 22.Rd1 Qb5 23.Bc1+=) 21.Kh1 Qg5 22.Rf6 gf6 (22...Rf6 23.Bh7 Kh8 24.Ne4=) 23.Bh7 Kh8 24.Nf3 (24.Ne4 Qh5 25.Nd6 Qh7–+) 24...Qg3 25.Be4 (25.Qc2!?–/+) 25...f5!–+ 26.Bf5 (26.Bb7?? e4 27.Qe1 Rab8 28.Qg3 Bg3–+) 26...Rg8 (26...Na4 27.Qe4 Qf4 28.Nh4 Qe4 29.Be4 Nb2 30.Ng6 Kg7 31.Nf8 Bf8 32.Bb7–+) 27.Qc2 (27.Qf1 Na4 28.Rd1 Raf8 29.Rd6 Rf5–+) 27...Nd5 28.Re1 (28.Bc1!?–/+) 28...Raf8–+ 29.Qd2 (29.Re2 Ne3! 30.Re3 Rf5–+) 29...Nf4 30.Be4 Rf6 (30...Rf6 31.Re2 Rg4–+) 0–1. glovio (2300) – gambit_queen (2190), gameknot.com, 2014.

6.e3 c5 7.d3 Ngf6 8.c4 d4 9.Nbd2 (9.Be2 Qc7+=) 9...0-0 10.g3 Nb6 11.a4 (11.Bg2 Bf5 12.Qc2 de3 13.fe3 Ng4=) 11...e4 (11...Re8!?–/+) 12.de4 (12.Ne4 Ne4 13.de4 de3 14.fe3 f6=) 12...Re8 13.Bg2 (13.Be2 de3 14.fe3 Ne4 15.Ne4 Re4=) 13...de3+= 14.fe3 Ne4 15.0-0 Bg4 16.Qc2 Qe7 17.Qe4 (17.Ne4 Qe4 18.Qe4 Re4+=) 17...Qe4+= 18.Ne4 Re4 19.Nd2 Re3 (19...Re7 20.Rf2+=) 20.Bb7 Rae8 21.Bc6 R8e6 (21...Rd8 22.Bd5 Be6 23.Be6 fe6 24.Kf2–/+) 22.Bg2 (22.Rfc1 Be5 23.Be5 R6e5+= (worse is 23...R3e5 24.Nb3+/–)) 22...h5 23.Ra3 (23.Bd5 Re7+= (worse is 23...Nd5 24.cd5 Rg6 25.Nc4+=)) 23...Re2 (23...Ra3 24.Ba3 Be2 25.Re1 Bc4 26.Rc1–/+) 24.Bc3 (24.Bc1!?=) 24...R6e3+= 25.Rf2 Be5 (25...Re1 26.Rf1 Be5 27.Re1 Re1 28.Bf1 Bc3 29.Rc3+=) 26.Re2= Be2 27.Kf2 Rc3 28.Rc3 Bc3 29.Ke2 Bd2 30.Kd2 Na4 0–1. Cirulis,Ilmars (1905) – Osipov,Sergey (1975), FICGS, 2016.

6.e3 c5 7.Be2 f5 8.d3 Ngf6 9.e4 0-0 (9...de4 10.de4 Ne4 11.Nbd2 Nd2 12.Qd2=) 10.ed5= e4 (10...Nd5 11.Nbd2=) 11.de4 fe4 12.Ng5 Nb6 13.0-0 (13.Nd2 A) 13...Nbd5? 14.Nde4 (14.Nge4?! Be6+/–) 14...Bf4 15.Nf6 gf6 16.Ne4+-; B) worse is 13...Nfd5 14.Nge4 Na4 15.Nf3+/– (15.Nd6?! Nb2 16.Qc1 Qd6 17.Qb2 Re8=); C) 13...e3 14.fe3 Nfd5–/+ (14...Nbd5 15.Bc4 Kh8 16.Bd5 Nd5 17.Qh5+-)) 13...Ng4 (13...Na4 14.Bc1=) 14.Bg4 (14.h4 Bh2 15.Kh1 Nf2 16.Rf2 Rf2 17.Kh2 A) 17...Qd5? 18.Qd5 Nd5 19.Bc4+-; B) 17...Nd5 18.Bc1+/– (18.Ne4?? Qh4 19.Kg1 Rg2 20.Kg2 Ne3 21.Kg1 Nd1 22.Bd1 Qe1 23.Kh2 Qe4–+); C) 17...Qd6 18.Kg1 Qg3–+) 14...Qg5 15.Bc8 Rac8 16.Nd2 Rce8 (worse is 16...Qd5 17.Qg4 Be5 18.Be5 Qe5 19.Qe4 (19.Ne4? Rf4 20.Qg3 Re4–+) 19...Qe4 20.Ne4+/–) 17.Qe2 Attacking the isolated pawn on e4 (17.Qe1 Nd5 18.g3 Bf4–+) 17...Bh2 (17...Bh2 18.Kh2 Na4+=) 0–1. Cirulis,Ilmars (1840) – Schmidt,Jonny (1800), FICGS, 2015.

7.c4 0-0 8.d4 c6?? 9.c5?? (better 9.de5 Ne5 10.Be5 Be5 11.Ne5+-) 9...e4 (9...Be7!?=) 10.cd6+= ef3 11.Qf3 Nb6 12.Nc3 Qd6 13.Bd3 g6 (13...Nc4 14.Bc4 dc4 15.bc6 bc6 16.0-0=) 14.a4 (14.Rc1 Bg4 15.Qg3 Qg3 16.hg3 Rab8+=) 14...Re8 (14...Qb4 A) 15.Qf6? Qb2 16.0-0 Qc3 17.bc6 bc6-+ (17...Qd3?! 18.cb7 Bb7 19.Qb6-+); B) 15.Qe2=) 15.0-0 (15.Ba3 Qe6 16.bc6 bc6+/-) 15...Nc4 (15...Bg4 16.Qg3 Qg3 17.hg3=) 16.Bc4+= dc4 (better 16...Ng4 17.g3 dc4+=) 17.Rad1?? (better 17.Ba3 Qe6 18.bc6 bc6 19.Rfc1+/-) 17...Bg4-+ 18.Qg3 Qg3 19.hg3 (19.fg3 Bd1 20.Rf6 Ba4 21.Na4 cb5-+) 19...Bd1 20.Rd1 cb5 (20...Nd5 21.Rb1-+) 21.Nb5 Rec8 22.d5 Nd7 (22...Ne4 23.Bd4-/+) 23.Rc1 (better 23.Bd4 Nc5 24.Nc3-/+) 23...b6 (better 23...Nb6!? 24.Nc3 f5-+) 24.e4 (24.Nd6 Rd8 25.Nc4 Rdc8=+) 24...Rc5 (24...f5 25.ef5 gf5=+) 25.d6 (25.g4!?=) 25...Rac8 (25...Re8 26.f3 f5 27.Nc7-/+) 26.e5 (26.Bd4 Rb5 27.ab5 f6-/+) 26...Kf8 (26...Ne5!? 27.Bd4 Rd5-/+) 27.f4=+ c3 28.Rc3 (28.Nc3 Rc4=+) 28...Rc3-/+ 29.Bc3 (29.Nc3 Rc4-/+) 29...Nc5 30.Bd4 Na4 31.Kf2 Ke8 32.Nc7 Kd7 33.Nd5 Nc5?? (better 33...Rc2 34.Kf3 Rd2-/+) 34.Nb6+- Kd8 35.Nc8 Kc8?? (better 35...Nb3+-) 36.Bc5 Kd7 (36...h5 37.Ke3 Kd7 38.Kd4+-) 37.Ke3 f5 (37...a4+-) 38.Kd4 (38.ef6 Ke8 39.f7 Kd7 40.f8Q h6 41.Qf7 Kc6 42.d7 g5 43.d8Q gf4 44.Kd3 Kb5 45.Qfd7 Kc5 46.Qa5) 38...a4 39.Kd5 a3 (39...g5 40.e6 Kd8 41.Kc6 gf4 42.d7 f3 43.e7) 40.Ba3 (40.e6 Kc8 41.Kc6 Kb8 42.e7 Kc8 43.e8Q) 40...h5 (40...h6 41.e6 Kd8 42.Kc6 Kc8 43.d7 Kb8 44.Bc5 g5 45.d8Q) 41.e6 (41.e6 Kd8 42.Kc6 Kc8 43.d7 Kb8 44.Bc5 g5 45.d8Q) 1-0. Kazuma (1905) - babken (2065), Rated Blitz game, lichess.org, 2014. (=1.a3 d5 2.b4 a5 3.b5 e5)

7.c4 0-0 8.e4? dc4 (better 8...de4!? 9.Ng1 Nc5-+) 9.Bc4 (9.Qc2 Nc5-/+) 9...Qe7 (9...Ne4 10.d4 ed4 11.Qd4-/+) 10.d3 Nb6 11.Nbd2 Bg4. Pierre – GrandDuke, internet, 2020.

7.c4 e4 8.Nd4 dc4 9.Bc4 Ne5 10.Be2 0-0 11.0-0 Nfg4 12.h3 Qh4 13.Qe1 (13.Qc2 Nf6 14.f4 Qg3-/+) 13...Qh6 14.f4 (14.hg4?? Ng4 15.Nf3 ef3 16.Be5 Be5 17.Bf3 Qh2) 14...ef3 15.Nf3 (15.Bf3? Nh2 16.Be4 Nf1 17.Qf1 f5 18.Bd5 Kh8-+) 15...Nf3 16.Rf3 (worse 16.Bf3 Nh2-/+) 16...Be6 17.hg4 Qh2 18.Kf2 Qh4 19.Kf1 Qh1 20.Kf2 Qh4 21.Kf1 Qh1 ½-½. marekt (2215) - fredbaraer (1975), gameknot.com, 2021.

7.d4 e4 8.Nfd2 0-0 9.c4 c6 10.Nc3 Re8 11.g4 (11.c5 Bb8+=) 11...h6 (11...dc4 12.g5 Nd5 13.Nce4=) 12.h4= cb5 (12...c5!? 13.Nd5 cd4 14.Bd4 Nd5 15.cd5 Ne5+=) 13.c5+/- Bf8 (13...Nc5 14.dc5 A) 14...Bc5? 15.g5 (15.Nb5?! Bg4 16.Qa4 Qb6=) 15...Ng4 16.Bb5+-; B) 14...Bg4+=) 14.g5 Nh7 15.gh6 g6 16.Nd5 (16.Bb5 Nhf6+-) 16...Bh6? (better 16...Nc5 17.dc5 Qd5+/-) 17.Bb5 Nhf6 18.Nc3 (18.Nf6 Qf6 19.h5 g5+-) 18...Re7 (18...Qe7 19.h5! gh5 20.Rb1+-) 19.h5! Nh5 (19...Nh5 20.Nce4 Deflection; 19...gh5 20.Nd5 Decoy) 20.Rh5 (20.Nde4!? Bg7+-) 20...gh5 21.Qh5 Qf8?! (21...Bg7 22.Nce4 Nf8 23.Rb1+-) 22.Nd5 Re6 (22...Bg7 23.Qf5 Re6 24.Ne4 Nc5 25.Nef6 (25.dc5?! Bb2 26.Nef6 Bf6 27.Nf6 Rf6 28.Qf6 Qc5+-; 25.Nc5?! Re3 26.Ne3 Bf5 27.Nf5 Rd8+/-) 25...Bf6 26.Nf6 Rf6 27.Qf6+- (27.Qc5?! Qg7=)) 23.0-0-0 (better 23.Nc7 Nf6 24.Qh4+- (worse 24.Ne6 Be6 25.Qh4 Bg7+-)) 23...Rg6 24.Ne4 Nb8 (24...Bg7+-) 25.Ndf6 Kh8 (25...Kg7 26.d5 Qe7 27.Qh4+-) 26.d5 1-0. FeegLood (2780) - toivok (2770), lichess.org, 2017.

7.d4 e4 8.Nfd2 Nb6 9.c4 dc4 10.Nc4 Nc4 11.Bc4 0-0 12.Nc3 c6 13.a4 (13.bc6 bc6 14.Qc2 Qe7=) 13...Bd7 (13...Bg4 14.Qc2=) 14.Ba3 Ba3 15.Ra3 Qe7 16.Qb3 Rac8 17.b6 c5 18.d5 Qe5 (18...Qd6 19.Qb1=) 19.Qc2 (19.Ra2 Bf5=) 19...Rfe8+= 20.Ra1 Qg5 21.Kf1 Re5 (21...Qe5 22.Kg1+=) 22.Rb1 (22.Rd1 Qg6=) 22...Ng4 (22...Ne8 23.h4 (23.Ne4? Re4 24.Qe4 Bf5–+) 23...Qh5 24.Be2+= (24.Ne4? Re4 25.Qe4 Bf5–+)) 23.Be2 (23.h3 Nf6 24.Kg1=) 23...Ne3 (better is 23...Qf6!? 24.Bg4 Bg4+=) 24.fe3+= Qe3 25.Ke1 Qh6 26.Bb5 (26.g3 e3+=) 26...Bb5 (26...Qe3!? 27.Be2 Qh6=) 27.Rb5+= (worse is 27.Nb5 Rd5 28.Qe4 Qc6+=) 27...e3 (27...Qe3 28.Kd1 Rd8 29.Qd2+=) 28.Rf1 (28.Qe2 Qh4 29.Kd1 Re7+=) 28...e2 (28...Qh2 29.Qe2= (29.Ra5? Qg3 30.Kd1 e2 31.Ne2 Rd5 32.Kc1 Qa3 33.Qb2 Qe3 34.Kb1 Rd2–+)) 29.Rf2 (29.Rh1!?+=) 29...Qh2= 30.Re2 Qh4 31.Kd2 ½–½. Cirulis,Ilmars (1905) – Pareschi,Remo (2000), FICGS, 2015.

7.Be2 e4 8.Nd4 Ne5 9.0-0 Nfg4 (9...0-0 10.Nc3+=) 10.g3 (10.h3 Nh2 11.Re1 Qg5+=) 10...Qg5+= 11.Nc3 Qh6 12.Bg4? (better is 12.h4 Nf6 13.b6+=) 12...Bg4–+ (12...Ng4 13.h4 g5 14.Nd5 gh4 15.Qe2–+) 13.f3 (13.Nce2 c5 14.bc6 bc6–+) 13...ef3 14.Rf2 Qg5 (14...c6 15.Rb1–+) 15.Qf1 (15.e4 Nc4 16.Nf3 Qe7 17.Nd5 Nb2–+) 15...h5 16.h4 (16.Rf3 Nf3 17.Nf3 Qg6–+) 16...Qg6 17.d3 Be6 (17...Be6 18.Nf3 Qg3 19.Qg2 Nf3 20.Rf3 Qh4–+) 0–1. Fournier,Frederic (2095) – Hervet,Gilles (2355), Grand Prix AJEC, 2009.

6.c4 dc4 7.e4=.

6.c4 c6 7.c5 Bc5 8.Be5 Nf6 9.d4 Bb6 10.e3 0-0 11.Bf6 Qf6 12.Nc3 Bg4 13.Be2 Nd7 14.Rc1 Rac8 15.h3 Bh5 16.bc6 bc6 17.Ne5 Be2 (17...Ne5!? 18.Bh5 Nc4=) 18.Nd7+= Bd1 (18...Qe7 19.Qb3 Qd7 20.Qb6+=) 19.Nf6+/- gf6 20.Kd1 f5 21.Na4 Ba7 22.g3 Rfe8 23.Kd2 Kg7 24.Rc3 Re7 25.Rhc1 Re6 26.Nc5 Rh6 27.Nd3 Bb8 28.a4 Kf8 (28...Rh3 29.Rc6 Rc6 30.Rc6+-) 29.Rc5 Rh3 30.Rd5! Rh2 (30...cd5 31.Rc8 Double attack (31.Rc8 Pinning; 31.Rc8 Deflection; 31.Rc5 Decoy; 31.Rc8 Clearance)) 31.Ra5 Bg3 32.Rf5 h5 33.a5 Bb8 (33...Ke7 34.a6+-) 34.a6 Ba7 (34...h4+-) 35.Ne5 (35.Ne5 Rc7 36.d5+-) 1-0. marekt – MAIFFRETP, ChessWorld.net, 2021.

6.c4 c6 7.e3 Nf6 8.d4 e4 9.Nfd2 0-0 10.c5 Bc7 11.b6 Bd8 12.h3 Nfd7 13.Nc3 f5 14.g3 g5 Black intends f4 (14...Nf6 15.Be2=) 15.Ne2 (15.Qh5 Qg7+=) 15...Nf6 16.h4 (16.Bg2 Be6+=) 16...f4 (better 16...g4=) 17.gf4+/- gf4 (17...g4 18.Qa4+/-) 18.Nf4+- Ng4 (18...Kh8 19.Rg1+-) 19.Qe2 Nd7?? (better 19...Bf5+-) 20.Qg4 (20.Qg4 Kh8 21.Rg1+-) 1-0. Grandie – Guestfree, internet, 2021.

6.c4 Nf6 7.cd5 e4 8.Nd4 Nd5 9.Nc3 (9.e3 0-0=) 9...Nc3=+ 10.Bc3 0-0 (10...a4 11.Bb2=+) 11.e3 (11.Qa4 Bd7=+) 11...a4 (11...Ba3 12.d3=+) 12.Qc2 (12.Qc1 c5 13.bc6 Nc6=+) 12...Re8 (12...Ba3 13.d3=+) 13.Bc4 Qg5 14.h4? (14.g3 Nd7=+) 14...Qg6 15.h5 Qg5 16.Kf1= Nd7 17.f4 Qc5 18.Qa2+/– Rf8 19.h6 Nb6 20.hg7 Qc4 21.Qc4 Nc4 22.gf8Q Bf8+= 23.Rh5 h6 24.Bb4 Bb4 25.ab4 Kg7 26.Kf2 Nd2 27.Ra2 Nc4+= 28.Rc5 Nb6 29.Ra3 Bg4 30.Rc7 Nd5 31.Rc5 Nb6 32.Kg3 h5 33.f5 (33...Kf6 34.Kf4+/–) 1–0. Luzuriaga,Norberto Horacio – Heynen,Guy, corr b4/07/31, 2008.

6.e3 c5 7.bc6 bc6 8.Be2 Be6 (8...Nf6 9.c4=+) 9.d3 (better 9.Be5 Nf6 10.Bd6 Qd6 11.d4+-; better 9.Be5!? Nf6 10.Nc3+-) 9...Nd7=+ 10.Nbd2 Nh6 11.Qc1 (11.0-0 0-0=+) 11...0-0 12.0-0 f6 (12...Rfb8 13.Rb1=+) 13.c4 a4 (13...Rab8 14.Rb1=+) 14.Qc2 Rfb8 (14...Rfc8 15.Rfe1=+) 15.Rfb1 Nc5 Black intends e4. Black intends e4 (15...Rb7=+) 16.Bc1 (16.Bc3 Bd7=+) 16...e4 (16...Nf5 17.cd5 cd5 18.d4–/+) 17.Nd4 (17.de4 de4 18.Rb8 Rb8=+) 17...Bd7 (17...ed3 18.Bd3 Nd3 19.Qd3–/+) 18.de4 (18.cd5 ed3 19.Bd3 Nd3 20.dc6 Nc1 21.Qc4 Nf7 22.Rb8 Rb8 23.cd7 Nb3 (worse 23...Ba3 24.Qa4 Bb2 25.Rb1+-) 24.N2b3 ab3=) 18...de4=+ 19.Rb8 Rb8 20.Rb1 Rf8 (20...Rb1 21.Qb1 Qe8 22.Bb2=+) 21.Bb2 (21.Nf1 Nf5=) 21...f5=+ 22.g3 (22.Nf1 Nf7=+) 22...Qg5 Black plans f4. Black prepares the advance f4 (22...Ng4 23.Bc3=+) 23.h4 (23.Bc3 Nf7=) 23...Qg6–/+ 24.Qd1? (better 24.Nf1–/+) 24...f4?? (24...Bg3!? 25.h5 Qg5 26.fg3 Qg3 27.Kh1 Ng4 (27...Qe3?! 28.Qg1 Qh3 29.Qh2 Qh2 30.Kh2–/+) 28.Bg4 Nd3–+ (28...fg4 29.Qg1 Qh3 30.Qh2 Qh2 31.Kh2 Rf2 32.Kg3 Rd2 33.Bc3–/+)) 25.ef4?? (better 25.Bh5 Qf6 26.Nc2= (worse 26.ef4 Bf4 27.N4f3 Qe7=+)) 25...Bf4–/+ 26.Bh5 (26.h5 Qg5 27.N4f3 ef3 28.Nf3 Qh5–+) 26...Qd6 27.Nf1 (27.gf4 Qf4 28.Qe2 Qh4–/+; 27.gf4 Qf4 28.Qe2 Qh4–+) 27...Nd3 (better 27...Be5 28.Nc2 Nd3 29.Be5 Qe5–+) 28.Ne2? (28.gf4 Qf4 29.Qc2 Qh4 30.Bf3–+; 28.c5 Qf6 29.Nf3–/+ (29.gf4? Qh4 30.Bc1 Qf2 31.Kh1 Qd4–+)) 28...Be5–+ (28...Nb2 29.Qd6 Bd6 30.Rb2–+) 29.Be5 Qe5 30.Nf4 (30.Nc1 Qf5 31.Nd3 ed3–+) 30...Qd4 (better 30...Nf4 31.Qd7 Nh5 32.Qc6 Nf6–+; 30...Nf4!? 31.gf4 Qf4 32.Qd4–+) 31.Nd3=+ (31.Qd2 c5–/+ (31...Qc4?! 32.Ne3 Qc5 33.Nd3 Qh5 34.Nf4+=)) 31...ed3 (31...Qd3?! 32.Be2 Qd1 33.Bd1+=) 32.Ne3 Nf5 33.Nf5 (33.Qg4 Qe5–/+; 33.Qd2 c5–/+) 33...Bf5–+ (33...Rf5?! 34.Rb8 Rf8 35.Rf8 Kf8 36.Qa4=+) 34.Qd2 (34.Qa4? d2 35.Rf1 Bd3–+) 34...Qc4 35.Rb7 (better 35.Bf3 Be4 36.Be4 Qe4 37.Rb4–+) 35...Be4?? (better 35...Qd5 36.Qc3 Bd7–+; better 35...Qc2 36.Qf4 Qc5–+) 36.Qg5?? (better 36.Qb2 Rf6 37.Rb8 Rf8 38.Rf8 Kf8 39.Qb8 Ke7 40.Qc7 Kf6 41.Qd6 Qe6 42.Qf8 Ke5 43.f4 Kd4 44.Qg7 Kc5 45.Qa7 Kd6 46.Qa4+=; better 36.Qb2 Rf6 37.Rb8 Rf8 38.Rb7=) 36...Qd4–+ 37.Bf7 (37.Qd2 Qa1 38.Qd1 Qa3–+) 37...Kh8 (37...Rf7 38.Rb8 Rf8 39.Rf8 Kf8 40.Qf4 Ke7 41.Qc7 Kf6 42.Qf4 Ke6 43.Qg4 Ke7 44.Qg5 Ke8 45.Qh5 Kf8 46.Qd1–+; 37...Rf7 38.Rb8 Rf8 39.Rf8 Kf8 40.Qf4 Ke7 41.Qc7 Kf6 42.Qf4 Ke6 43.Qg4 Ke7 44.Qg5 Ke8 45.Qc1 d2 46.Qd1 Qc3 47.Kf1 Qc4 48.Kg1 Qc1 49.f3 Qd1 50.Kh2 Qf3 51.Kh3 d1Q 52.h5 Qh5) 38.Qe7 (38.Rb1 d2 39.Rd1–+; 38.Rb1 Qa7 39.Qf4–+) 38…Qa1 (38...Qa1 39.Rb1 Qb1 40.Kh2 Qh1) 0–1. Fournier,Frederic (1885) – Savouret,Frederic (2010), FRA Ch (Team) N4 Creil–SenlisB, 2006.

6.e3 c6 7.d4 e4 8.Nfd2 Nd7 (8...Nf6 9.c4=) 9.c4 Ndf6 (9...Qh4 10.c5 Bc7 11.Qa4=) 10.Nc3 Nh6 11.Qb3 Be6 12.bc6 (12.c5 Bc7+=) 12...bc6= 13.cd5 cd5 14.Bb5 Kf8 15.a4 (15.Rc1 Nf5+=) 15...g6 16.h3 1–0. Flores,Luis (2115) – Duttagupta,Aniruddha (1825), FICGS, 2016.

6.g3 Nf6 7.Bg2 0-0 8.0-0 h6 (8...e4 9.Nd4+=) 9.c4 (9.Nc3 Be6+=) 9...c6 (9...dc4 10.Qc2+=) 10.d4 (10.cd5 cd5 11.a4 Bg4+=) 10...e4 (10...dc4? 11.de5 Be5 12.Be5+-) 11.Ne5 Nbd7 (11...cb5 12.c5 Bc7+=) 12.bc6 (better is 12.Nd7!? Bd7 13.c5=) 12...Ne5–/+ 13.de5 Be5 14.cb7 Bb7 15.Be5 Qe5 16.Nd2 e3 (16...Rab8 17.Qc2–/+) 17.Nf3 ef2 18.Rf2 Qc7 (18...Qe7 19.Nh4 Ng4 20.Nf5+=) 19.Nd4 (19.cd5 Bd5 20.Rc1 Qe7–/+) 19...Ng4 (19...dc4!? 20.Bb7 Qb7–+) 20.cd5+= Nf2 21.Kf2 Qc5 22.Rc1 (22.Rb1 Ba6–/+ (worse is 22...Bd5 23.Rb5 Qa3 24.Bd5+/–)) 22...Qa3 23.Nf5 (23.Rc7 Ba6 24.Qc1 Qc1 25.Rc1 Bb7–/+) 23...Bc8–/+ 24.Ng7? (better is 24.Ra1 Qc5 25.Qd4–/+) 24...Kg7–+ 25.Qd4 Kg8 26.Rc6 (26.Qf4 Qb4 27.Qh6–+) 26...Ra6?? (better is 26...Qb4 27.Rc4 Qb5–+) 27.Rc8–/+ Rc8 28.Qg4 Rg6 29.Qc8 Kg7 30.Be4 Rf6 31.Kg2 Qe3 32.Qg4 Qg5 33.Qd7 h5+= 34.Qa7 h4 35.Qd4 h3–+ 36.Kh3 Qh5 37.Kg2 Qe2 38.Kh3 Qf1 39.Kg4 Qf2 40.Qe5? Qe2–+ 41.Kh3 Qd2 ½–½. Kuemin,Simon (2310) – Sakelsek,Tadej (2200), Mitropa Cup, Saint Vincent ITA, 2001.

7.c4 0-0 8.c5 Bc5 9.Be5 Bg4 10.d4 Nbd7 11.Bf6 Qf6 (11...Nf6? 12.dc5 Qc5 13.Be2+-) 12.Nc3 Nb6 13.Be2 (13.Bd3 Bd6+=) 13...Rfe8 (13...Bd6 14.0-0+=) 14.0-0 Bd6 15.h3 Bh5 16.Bd3 c5 17.bc6 bc6 18.a4 Nc4 19.Bc4 dc4 20.Qe2 Rab8 21.Rac1 Qg6 22.Qc2 Qc2 (22...Rb2 23.Qg6 (worse is 23.Qb2 Bf3 24.g4 Qh6 25.Qb4 Qh3 26.Qd6 Qg2) 23...Bg6 24.Rfd1–/+) 23.Rc2+= Bg6 24.e4 f6 25.Nd2 Red8 26.Nc4 Bc7 27.Rd1 Rb4 28.Ne3 Rbd4 29.Rd4 Rd4 30.f3 Be8 31.Kf2 Be5 32.Ng4 Bb8 33.Ke2 h5 34.Ne3 Be5 35.Rd2 Rb4 36.Rd8 Kf7 37.Kd3 Rb3 38.Ned1 Bb8 39.Kc2 Rb4 40.Na2 Rb6 (40...Rb7 41.Ne3 Ke7 42.Rd3+=) 41.Ne3 Ke7 42.Rd2 Bf7 43.Nf5 Ke8 44.Nc3 (44.Ng7? Kf8 45.Nh5 Bh5–+ (45...Ba2?! 46.Nf6 Bb3 47.Kc1–/+)) 44...g6 45.Nd6 Bd6 46.Rd6 Ke7 47.Rd4 Bb3 48.Kc1 g5 49.Kd2 Rb4 Attacking the isolated pawn on a4 50.Ke3 Rd4 51.Kd4 Kd6 52.g4 (52.g3 h4 53.gh4 gh4+=) 52...h4 53.Ke3 (53.Kd3!?–/+) 53...Kc5–+ 54.f4 gf4 55.Kf4 Kb4 56.Nb1?? (56.Ne2 Ka4 57.Nc1–+) 56...Ba4 57.Kf5 (57.g5 fg5 58.Kg5–+) 57...Bc2 58.Nd2 a4 0–1. antinephilehi (1900) – forsetinn (2235), gameknot.com, 2014.

7.c4 0-0 8.d4 ed4 ½–½. Cirulis,Ilmars (1675) – Reboredo,Daniel (1935), FICGS, 2015.

7.c4 Nbd7 8.Nc3 d4 9.Ne2 Nc5 10.Ng3 0-0 11.Qc2 (11.Nh4 d3–/+) 11...d3!–/+ 12.Qb1 (12.Bd3 e4 Double attack (12...e4 Decoy)) 12...e4 13.Nd4 Bg3 14.hg3 Ng4 15.f3 ef3 (better is 15...Qd6!? 16.f4 Qg6–+) 16.gf3+= Ne3 17.Bd3 (worse is 17.de3 Qe3 18.Kd1 Re8–/+) 17...Nf5 18.Kf2 Nd3 19.Qd3 g6?? (better is 19...Qd6 20.g4 Nh6=) 20.Nf5+- Bf5 21.Rh7! Qc5? (21...Kh7 22.Rh1 Mate attack) 22.Bd4 f6 (22...Bd3?? 23.Rh8; 22...Kh7?? 23.Rh1 Bh3 24.Rh3 Qh5 25.Rh5 Kg8 26.Rh8) 23.Qe3 (23.Bc5?! Bd3 24.Rc7 Rf7+-) 23...Qd6 (23...Qd4 24.Qd4 Kh7 25.g4+-) 24.Qh6 (better is 24.Rah1 Bh3 25.R1h3 Qe5 26.Be5 fe5 27.Qd3 Rfe8 28.Qg6 Kf8 29.Qf7) 24...Qd4 25.Kg2 Qd2 26.Qd2 Kh7 27.Rh1 Kg8 28.g4 Rfd8 29.Qh6 Bd3 30.Qh7 Kf8 31.Qc7 (31.Qc7 Bc4 32.Rh8 Bg8 33.Qh7 Rd2 34.Kg3 Rg2 35.Kg2 Rd8 36.Rg8) 1–0. Logvinov,Kirill (2015) – Nadeev,Sergey (2295), Kaluga RUS, CFO Team Ch, 2012.

7.c4 e4 8.Nd4 0-0 9.cd5 Nd5 10.d3 c5 11.de4 Ne3 (11...Qe4 12.Nf3=) 12.fe3 cd4 13.Qd4 Qh4 14.g3 Qh6 15.e5 Be7 16.Nc3 Be6 17.Bg2 Nd7 18.Nd5 Bd5 19.Bd5 (19.Qd5?! Qe3 20.Kf1 Nc5+=) 19...Bg5 (19...Nc5 20.0-0+/–) 20.Qg4 (20.Bb7 Rad8 21.Rd1 Rfe8+/–) 20...Nb6 (20...Nc5 21.0-0+=) 21.Bb7+/– Rad8 22.Rc1 Be3 23.Rc6 g6 24.Rc2 Rd3 25.e6 (25.h3!?+/–) 25...Bd2+= 26.Kf1 fe6 27.Kg2 Qe3 28.Be4 Rf2 29.Kh3 Qh6 30.Qh4 Qh4 31.Kh4 Re3 32.Bc6+= e5 33.Bc1 Ree2 34.Kh3 Kf7 35.Bb7 Ke7 36.Rc7 Kd6 37.Rc2 a4 38.Rc6+/– Kd7 39.Bd2 Rd2 40.Rb6 Kc7 41.Ra6 Kb7 42.Ra4 Rb2 43.Rh4 h5 44.a4 Rf5 45.Rc4 g5 46.Rc6 Rb4 47.Rh6 Ra4 48.Rh5 e4 49.Rh7 Kb6 50.Re7 Rf8 51.Re1 Rh8 52.Kg4+- e3 53.Kf5 Kb5 54.Re2 g4+= 55.R7e3 Rf8 56.Kg6 Rg8 57.Kf7 Rh8 58.Re8 Rh7 59.Kf6 Raa7 60.Rc8 Kb4 61.Rg8 Kc4 62.Kf5 Kd3+/– 63.Rb2 Kc3 64.Rg2 Ra4 65.Rg4 Rf7 66.Kg6 Raa7 67.Rf4 Rg7 68.Kf5 Kd3 69.Rf3 Kd4 70.Rd2 Kc4 71.h4 Rg8 72.Rdd3 Rh7 73.Rc3 Kb4 74.Rce3 Kc5 75.Ke5 Re7 76.Kf6 Ra7 77.h5 Rgg7 78.Ra3 Raf7 79.Ke5 Re7 80.Kf4 Ref7 81.Ke3 Rb7 82.Ra4 Rb3 83.Kf2 Rb2 84.Kg1 Re2 85.g4 Rh7 86.Rf5 Kb6 87.Rf6 Kb5 88.Raf4 Re8 89.h6 Kc5 90.Kf2 Rhh8 91.R4f5 Kd4 92.Rh5 Ke4 93.g5 Re5 94.Rh4 Kd5 95.g6 Rg5 96.Ra4 Ke5 97.g7 Rh6 98.Rh6 Rg7 99.Rh5 (99.Rh5 Ke6 100.Ra6 Kf7 101.Rh3+-) 1–0. Szabo,Almos (2305) – Taylor,Terry J (2460), 7th European Team Championship – Semifi, 2005.

7.d3 Bg4 8.Be2 Nbd7 9.a4 0-0 10.Nbd2 Rad8 11.0-0 Rfe8 12.Re1 e4 13.Nd4 Be2 14.Qe2 Qe5 15.f4 ef3 16.N2f3 Qh5 17.g3 Ng4 18.Bc1 Nde5 19.c3 Bc5 20.Ra2 Rd7 21.Qf1 Rde7 22.Ne5 Re5 23.Rae2 Qg6 24.Qf4 h5 25.e4 (25.Rf1 h4+= (worse is 25...Qd3 26.Qf7 Kh8 27.Nf5+=)) 25...Nf6–/+ 26.Kg2 de4 27.de4 Bd4 28.cd4 Re4 29.Re4 Re4 30.Re4 Qe4 (worse is 30...Ne4 31.Qc7 Qg4 32.Qc4= (32.Qa5?? Qe2 33.Kh3 Nf2 34.Kg2 Ng4 35.Kg1 Qh2 36.Kf1 Qf2)) 31.Qe4 Ne4 32.Bf4 c6 33.bc6 bc6 34.Bc7 Nc3 35.Ba5 Na4 36.Kf3 Kf8 37.Ke4 Ke7 38.Bb4 Ke6 39.Bf8 g6 40.Bb4 Nb6 41.Ba5 Nc4 42.Bb4 Nd6 43.Kd3 Kd5 44.Bc5 Ne4 45.Ba7 Nf2 46.Ke2 Ng4 47.h3 Nh6 48.Kd3 g5 49.Bc5 (better is 49.Bb6–+) 49...g4 50.hg4 hg4 (50...Ng4?! 51.Bb4–+) 51.Ke3 Nf5 52.Kf4 Nd4 (52...Nd4 53.Ba3 f5–+) 0–1. Fournier,Frederic – Le Hay,Thierry, FRA Ch (Team) N4 Senlis–Chauny, 1999.

7.d4 ed4 8.Qd4= 0-0 9.Bd3 c5 10.bc6 Nc6 11.Qh4 Ne5? (11...Ne4 12.Qe7 Be7 13.Nc3=) 12.Nbd2 (12.Ne5!? Be5 13.Bh7 Kh8 14.Bd3 Kg8 15.Bd4+/-) 12...h6 (12...Re8 13.Be5 Be5 14.Ne5 Qe5 15.0-0+=) 13.Ne5 Be5 14.Be5 Ne4?? (better 14...Qe5 15.0-0 Re8+=) 15.Qe7+- 1-0. FeegLood (2785) - Arka50 (2770), lichess.org, 2016.

7.d4 e4 8.Nfd2 0-0 9.c4 c6 10.Nc3 Nbd7 11.g4 (11.c5 Bc7=) 11...dc4 12.Bc4 Nb6 13.Be2 c5 (better 13...cb5!? 14.g5 Ne8=) 14.g5+/- Nfd5 15.Nce4 cd4 16.Bd4 (16.Nd6 Qd6 17.Ne4 Qg6 18.Qd4 f6+-) 16...Be5 (16...Ba3!? 17.Bd3 Rd8=) 17.Nf3 (17.Bc5 Qe6 18.Bf8 Ba1+/-) 17...Bd4+= 18.Qd4 Rd8 19.Ng3 (19.Rg1 Bf5 20.Nf6 Kh8+=) 19...Be6 (19...Nb4 20.Qb2 Na4 21.Qc1 Nd3 22.Bd3 Rd3 23.0-0=) 20.0-0 Nd7 21.Bd3 Nc5 22.Bf5 (22.Bc2!?+/-) 22...Nb3= 23.Qb2 (better 23.Bh7!? Kf8 24.Qe5 Na1 25.Ra1+= (worse 25.Qa1 Rac8=+)) 23...Na1-/+ 24.Qa1 g6 (24...Nc7 25.a4-/+) 25.Be4 Nc7 (25...Rd6 26.Rd1=+) 26.Qe5 (better 26.Bb7 Rab8 27.Ne4=) 26...Qa3?? (better 26...Ne8=+) 27.Qc7+- a4 (27...Rd7 28.Qf4+-) 28.Bb7 Rab8?! (28...Rd7 29.Qc6 Rb8+-) 29.Ne4 Qb2 (29...Bf5 30.Nf6 Kg7 31.Nd4+-) 30.Bc6 (30.Nd4 Bh3 31.Nf6 Kg7+-) 30...a3 (30...Rbc8 31.Nf6 Kh8+-) 31.Nf6 Kg7 32.Qf4 (better 32.Nd4 Bh3 33.Rd1+-) 32...a2+= 33.Nd4 a1Q 34.Ra1 (better 34.Ne6 fe6 35.Qc7 Kf8 36.Ra1 (36.Nh7 Kg8 37.Ra1 Qa1 38.Kg2 Qg7 39.Nf6 Kf8+-) 36...Qa1 37.Kg2+-) 34...Qa1=+ 35.Kg2 Qa7? (35...Bc4 36.Qe5 Qd1+-) 36.Qe5+- Kf8 37.Nh7 Kg8 38.Nf6 Kf8 39.h4 (better 39.Ne6!? fe6 40.Nd7 Rd7 41.Bd7 Qd7 42.Qb8 Ke7+-) 39...Qe7 40.Nh7?? (better 40.Nd7! Kg8 41.Ne6 (41.Nb8?! Bh3 42.Kh3 Qe5=) 41...Qe6 42.Qe6 fe6 43.Nb8 Rb8 44.Kg3+-) 40...Kg8+/- 41.Nf6 Kf8 42.h5?? (42.Nd7 Kg8+-) 42...Qd6 (better 42...Bh3! 43.Kh3 Qe5-+) 43.Nh7 (43.Qd6!? Rd6 44.hg6 Rbd8 45.gf7 Kf7+-) 43...Kg8 44.Nf6 Kh8?? (44...Kf8 45.Qd6 Rd6 46.hg6 Rbd8 47.gf7 Kf7+-) 45.Qd6+- (45.Ne6?? Qe5 46.Nd8 Qg5 47.Kf1 Qf6-+) 45...Rd6 46.h6 Bg4?? (better 46...Bc4+-) 47.Ng4 Rdd8 48.Ne5 f5 (48...Kg8 49.Kf3 Rbc8 50.Ke4+-) 49.Nf7 (49.Ng6 Kh7 50.Ne7 Rf8+-) 49...Kh7 50.Nd8 Rd8 51.b6 Rd4 (51...f4 52.Ne6 Rb8+-) 52.b7 (52.b7 Rb4 53.Kg3+-; 52.ed4 Kh8 53.b7 Kh7 54.b8Q f4 55.Qc7 Kh8 56.Qg7) 1-0. FeegLood (2805) - Arka50 (2750), Time forfeit, 2016.

6.d3 Ne7 7.e4 0-0 8.ed5 Nd5 9.c4 Nf4 10.g3 Nh3 11.Nc3 Bg4 12.Ne4 Nd7 (12...Be7 13.Bg2=+) 13.Be2 Nc5 14.Nh4 f5 15.Nd6 Be2 (< 15...Qd6 16.f3 Bh5 17.d4=; < 15...cd6 16.f3 Bh5 17.d4 ed4 18.Qd4=) 16.Qe2 Qd6 17.Rd1 Rad8 18.d4 e4 (18...ed4?! 19.Rd4 (19.Bd4? Rfe8 20.Be3 Nd3 21.Kf1 Qa3 22.Rd3 Qd3–+) 19...Rde8 20.Rd6 cd6 21.Bd4 Re2 22.Ke2=) 19.Rf1 (19.Kf1 Nd3 20.Rd3 ed3 21.Qd3 Qh6–/+) 19...Nd3 20.Rd3 Nf4 21.gf4 ed3 22.Qd3 Qe7 23.Kd2 Qh4 24.Qg3 Qf6 25.Kc1 Rfe8 26.d5 Qh6 27.Rg1 Rd7 28.Kb1 Re4 29.Qc3 b6 (29...Rf4?! 30.Bc1 Qd6 31.Bf4 Qf4 32.Re1=) 30.h3 a4 (< 30...Rf4 31.f3 Re7 32.Bc1=) 31.Bc1 Rde7 32.Qd3 Re1 (32...Qh4!? 33.Rg3 Qf6–/+) 33.Re1=+ Re1 34.Qf5 g6 35.Qc8 Qf8 36.Qf8 Kf8 37.Kc2 Re2 38.Kc3 Rf2 (39.Kb4 Rf3–/+) 0–1. Hind,Alan – Schirmer,Michael, corr 3GMM½–05, 1998.

6.d4 e4 7.Nfd2 Be6 8.e3 Nd7 9.c4 c6 10.Nc3 Ne7 11.Qb3 dc4 12.Bc4 Bc4 13.Nc4 Nb6 14.Nd6 Qd6 15.Ne4 Qd5 16.Qd5 Nbd5 17.Nd6 Kd7 18.Nb7 cb5 19.Nc5 Kd6 20.Kd2 Rhc8 21.e4 Nf4 22.g3 Nfg6 23.Nd3 Nc6 24.Rac1 b4 25.a4 Rd8 26.f4 Ke7 27.d5 Na7 28.Rc7 Rd7 29.Rhc1 Rad8 30.Bd4 Nf8 31.Ra7 Ra7 32.Ba7 Rd7 33.Bb6 Kf7 34.Ba5 Rd8 35.Bb4 Rb8 36.Bf8 Kf8 37.Rc7 Ra8 38.Nc5 Kg8 39.Ne6 h6 40.Rg7 Kh8 41.Rg6 Ra4 42.Ke3 Ra3 43.Kf2 Ra7 44.Kf3 Rh7 45.Kg4 h5 46.Kf5 Rh6 47.Rh6 Kg8 48.Kf6 Normal 1-0. jimakos (2630) - fibunk0 (2355), Rated Bullet game, lichess.org, 2016.

6.e3 Bg4 7.h3 Bh5 8.g4 Bf7 9.c4 Ne7 10.g5 Bh5 11.gf6 gf6 12.Be2 dc4 13.Nc3 (13.Bc4? e4 14.Be2 ef3 15.Bf3 Bf3 16.Qf3 Nd7–+) 13...Nd7 14.Ne4 f5 15.Ng3 Bf7 16.Ng5 (16.Qc2!?=) 16...Bd5–/+ 17.Bf3 Bf3 18.Qf3 Nc5 19.Qh5 Kd7 20.Nf7 Nd3 21.Kf1 Qe8 22.Nh8 Qh5 (< 22...Nb2 23.Nf7 Nd3 24.Qh7+/–; 22...Qh8?! 23.Bc3=) 23.Nh5 Rh8 24.Bc3 c6 25.bc6 (25.b6 Rf8=) 25...Kc6=+ 26.f4 Nd5 27.fe5 Ne5 28.Ba5 (28.Rg1 Nc3 29.dc3 Nd3=+) 28...Nd3=+ 29.Bb4 N3b4 30.ab4 Nb4 31.Ke2 Rg8 32.Rhg1 Rg1 33.Rg1 Nd3 34.Rf1 Be5 (34...b5 35.Rf5 b4 36.Nf6+=) 35.Rf5+= b5 36.Nf6 b4 37.Nh7 b3 38.Kd1 Nb2 (38...Kd5 39.Ng5+/–) 39.Kc1 c3 40.dc3 (40.Re5?? Nd3 41.Kd1 c2 42.Ke2 Ne5–+) ½–½. Smith,Douglas Royston (2005) – Epiney,Flo (2040), Telechess, 2002.

7.c4 c5!? =+.

7.c4 Be6 8.d4+= ed4 9.Nd4 Bf7 10.Qg4 0-0 11.Ne6 Be6 12.Qe6 Rf7 13.Nc3 Be5 14.cd5 Qd6 15.Bc4+- Nd7? 16.Ne4 Qe6 17.de6 Bb2 18.ef7 Kf8 19.Ra2 Be5 20.0-0 Nb6 21.Be6 Rd8 22.f4 Bd6 23.Rd2 Nec8 24.Nc5! Bc5 25.Rd8 (25...Ke7 26.Re8 Kd6 27.f8Q Ne7 28.Qe7) 1–0. Gross,Wilhelm – Fengsrud,Roy, corr 3GMM–08, 1994.

8.Qd4 c6 A) 9.Bd3 A1) 9...c5 10.Qc3 Qb6 11.Be2 a4 12.Qd2=; A2) 9...0-0 10.c4 c5 11.Qc3 Qe8 12.Qc2=; A3) 9...Bf5 10.Nc3 Nd7 11.Bf5 Nf5 12.Qg4=; A4) 9...Be6 10.Qh4 Nf5 11.Qa4 Qc7 12.Nbd2=; A5) 9...cb5 10.Bb5 Nbc6 11.Nc3 0-0 12.Qd2=; B) 9.Nc3 B1) 9...Ng6 10.Qd1 Bg4 11.Be2 Qc7 12.h3=; B2) 9...Bf5 10.e4 Bg6 11.ed5 cd5 12.0-0-0+=; B3) 9...0-0 10.Bd3 a4 11.0-0 Nf5 12.Bf5=; B4) 9...Bd7 10.Rd1 Nf5 11.Qd3 Qe7 12.Be2+=; B5) 9...Nd7 10.Rb1 Ne5 11.Be2 Bf5 12.Qd1=; C) 9.Be2 C1) 9...Bf5 10.Qd2 Qc7 11.Nd4 Bd7 12.c4=; C2) 9...0-0 10.c4 c5 11.Qc3 Be6 12.Bd3=; C3) 9...Qd7 10.c4 Nf5 11.bc6 bc6 12.Qd2+=; C4) 9...Nf5 10.Qd2 0-0 11.c4 Be6 12.cd5+=; C5) 9...cb5 10.Bb5 Nbc6 11.Nc3 0-0 12.Qd2=; D) 9.c4 D1) 9...Nf5 10.Qd1 dc4 11.Bc4 cb5 12.Bb5+=; D2) 9...c5 10.Qd2 Be6 11.Nc3 dc4 12.Rd1+/–; D3) 9...0-0 10.cd5 Nd5 11.Bc4 Be6 12.Nc3+=; D4) 9...Nd7 10.cd5 Nd5 11.Nbd2 Qe7 12.Ne4+=.

8.Qd4 Nd7 9.Nc3 A) 9...Nb6 10.Be2 Bf5 11.e4 Bg6 12.Nd5+=; B) 9...c6 10.Qg4 Ng6 11.Qe6 Qe7 12.Qe7=; C) 9...Ne5 10.Be2=+ Nf3 11.Bf3 Be5 12.Qd3=.

8.Qd4 Nd7 9.Qd1 A) 9...0-0 10.Nbd2 Nc5 11.c4 Kh8 12.Be2=; B) 9...Nc5 10.Nbd2 0-0 11.c4 Kh8 12.Be2=; C) 9...Ne5 10.Ne5 fe5 11.c4 Be6 12.cd5=; D) 9...a4 10.c4 Nb6 11.cd5 Ned5 12.Bd3=; E) 9...Nb6 10.Bd3 0-0 11.0-0 Qe8 12.Nbd2=.

8.Qd4 Nd7 9.Nbd2 A) 9...Nc5 10.Bd3 Nf5 11.Bf5 Bf5 12.Qd5+=; B) 9...Nb6 10.Be2 Bd7 11.0-0 0-0 12.c4=; C) 9...Ne5 10.c4 c5 11.bc6 N5c6 12.Qc3=; D) 9...Bc5 10.Qd3 0-0 11.c4 Nb6 12.cd5+=; E) 9...0-0 10.Be2 Nb6 11.0-0 Be6 12.Qd3=.

8.Qd4 Nd7 9.Be2 A) 9...0-0 10.Nbd2 Nb6 11.0-0 Be6 12.Qd3=; B) 9...Nc5 10.0-0 Bf5 11.Qd1 0-0 12.c4=; C) 9...Nb6 10.Nbd2 Nf5 11.Qd3 Qe7 12.e4=; D) 9...Ne5 10.Nbd2 Bf5 11.Qc3 Nf3 12.Nf3=.

8.Qd4 Be6 A) 9.Bd3 A1) 9...c5 10.Qh4 Nf5 11.Bf5 Bf5 12.Nc3+=; A2) 9...Nf5 10.Qa4 0-0 11.Nc3 c6 12.0-0+=; A3) 9...Nd7 10.Qh4 Nc5 11.Nd4 Qd7 12.Nc3=; B) 9.Be2 B1) 9...0-0 10.Qd1 c5 11.c4 Qb6 12.Nc3=; B2) 9...c5 10.Qd1 0-0 11.c4 Qb6 12.Nc3=; B3) 9...Nf5 10.Qd2 Nd7 11.Nc3 Nb6 12.Bd3=; B4) 9...Qd7 10.0-0 0-0 11.Nc3 c5 12.Qa4=; B5) 9...Nd7 10.Nc3 0-0 11.0-0 Nc5 12.Qd2=; C) 9.Nc3 C1) 9...Nd7 10.Qd2 Ne5 11.Nd4 Bg4 12.h3=; C2) 9...0-0 10.Bd3 Nd7 11.Qh4 Ng6 12.Bg6+=; C3) 9...Qd7 10.Bd3 Bg4 11.Be2 Bf3 12.Bf3+=; C4) 9...c6 10.Be2 Nf5 11.Qd2 0-0 12.Bd3=; C5) 9...c5 10.Qd3 Nd7 11.Be2 Ne5 12.Ne5=; D) 9.Qd2 D1) 9...c5 10.c4 dc4 11.Qc2 a4 12.Bc4+=; D2) 9...Qd7 10.Nc3 c6 11.Nd4 Bg4 12.h3+=; D3) 9...Bg4 10.Be2 Nd7 11.0-0 0-0 12.Nc3=; D4) 9...Nd7 10.Be2 Ne5 11.Nd4 Qd7 12.0-0=; D5) 9...0-0 10.Nc3 Re8 11.Nd4 Bf7 12.Bd3=.

9.Qa4 c4 10.Bd4 Nd7 11.c3 Nf5 12.Be2 =+.

9.Qc3 A) 9...Qb6 10.Be2 a4 11.Qd2 0-0 12.Nc3=; B) 9...a4 10.Qd2 0-0 11.c4 Be6 12.Nc3=; C) 9...0-0 10.Be2 Qb6 11.0-0 Bd7 12.a4=; D) 9...Nd7 10.Nbd2 Nb6 11.Be2 Na4 12.Qb3=; E) 9...Bg4 10.Nbd2 Nd7 11.h3 Be6 12.Rd1=.

9.Qd1 A) 9...0-0 10.c4 Be6 11.Nc3 dc4 12.Qa4+=; B) 9...Qb6 10.c4 Be6 11.Nc3 dc4 12.Nd2+=; C) 9...Nd7 10.c4 Nb6 11.cd5 Ned5 12.Qc2=; D) 9...Qc7 10.c4 Be6 11.Nc3 dc4 12.Rc1=; E) 9...Be6 10.c4 a4 11.Nc3 dc4 12.Rc1=.

9.Qd2 0-0 10.Nc3 Be6=+ 11.0-0-0 Nd7 12.Bc4 Nb6–/+ 13.Be2 Qc7 14.h4 Rfd8 15.Qe1 Nc4 16.Bc4=+ dc4 17.Qe2 Be5 18.Ne5+/– fe5 19.g4 Qb6 20.f4+= Qc7 21.f5+/– Bf7 22.e4 b6 23.Rd8 Rd8 24.Rd1 Rd4 25.g5 Qd6 26.Na4 Kh8 27.Bd4 cd4= 28.Qf3 Bh5 29.Qh5 Qa3 30.Kb1 Qb4 ½–½. marus1 – spok, internet, 2001.

9.Qd2 A) 9...Be6 10.c4 dc4 11.Qc2 Nd7 12.Bc4=; B) 9...Nd7 10.c4 Nb6 11.cd5 Ned5 12.Nc3=; C) 9...Qb6 10.c4 Be6 11.cd5 Nd5 12.Bc4+=; D) 9...Qc7 10.c4 Be6 11.cd5 Nd5 12.Bc4+=.

5.Nc3 Nb6 6.e3 Nf6 7.Nf3 Bd6 8.Be2 0-0 9.a4 c6 10.d4 e4 11.Ne5 Qc7 12.0-0 (12.Ba3 Bb4 13.Bb4 ab4+=) 12...Nbd7 (12...Be5 13.de5 Qe5 14.bc6 bc6 15.Rb1–/+) 13.Nd7 Bh2 (13...Bd7 14.h3+=) 14.Kh1 Bd7 15.g3 (15.bc6 bc6 (worse is 15...Bc6 16.g3 Bg3 17.fg3+=) 16.Ba3 Bd6–+) 15...Bg3–/+ 16.fg3 (16.bc6 bc6 17.fg3 Qg3–+) 16...Qg3–+ 17.Qe1 Qh3 18.Kg1 Ng4 (18...Qe3!? 19.Qf2 Qf2 20.Kf2 Bg4–+) 19.Bg4–/+ Qg4 20.Kh2 Qh3 (20...cb5 21.ab5 (21.Nb5 Qh3 22.Kg1 Ra6 23.Rf3 ef3 24.Qf2 Rg6 25.Qg3 Qg3 26.Kh1 Qg2) 21...Qh3 22.Kg1 Bb5 23.Rf2 Qg3 24.Rg2 Qe1 25.Re1–+) 21.Kg1 Rae8 (21...cb5 22.Rf2 Ra6 23.Qe2 Rg6 24.Rg2 Rg2 25.Qg2 Qe3 26.Kh2 Qh6 27.Kg1–+) 22.Rf2 Re6 23.Qe2 Rg6 24.Rg2 Bg4 (24...Rg2 25.Qg2 Qe3 26.Qf2 Qf2 27.Kf2–+) 25.Qd2 Qh6 (25...Bh5 26.bc6 Rg2 27.Qg2 Qe3 28.Qf2 Qg5 29.Kf1 bc6 30.Ke1–/+) 26.Re1? (better is 26.Ne2!?–/+) 26...Bf3–+ (26...Bf3 27.Ree2 Bg2 28.Rg2 Qh3–+) 0–1. antinephilehi (2140) – eekan (1920), gameknot.com, 2011.

5.c4 dc4 6.e3 Ngf6 7.Bc4 Nb6 8.Ba2 Bg4 9.f3 Bd7 10.Be5 Bb5 11.Nc3 Ba6 12.Qb3 Qd7 (12...Nc4 13.Bd4 Qd7 14.Nb1+=) 13.Nge2 (better is 13.Bf6!? gf6 14.Ne4+=) 13...Nc4+= Attacks the backward pawn on d2. The isolani on a3 becomes a target 14.Bd4 c5 (worse is 14...Ba3 15.d3 Bb2 16.Rd1 Bc3 17.Nc3=) 15.Bf6 Qd2 (worse is 15...gf6 16.Ne4 Be7 17.Nf4+=) 16.Kf1 gf6 17.Qa4 b5 18.Nb5 Ne3 19.Kf2 Bh6 20.Qe4 Kd7 21.Bf7 Bb5 22.Qb7 Kd6 23.Qb5 Rhb8 24.Qa4 Ke7 25.Ba2 Kf8 26.Qc6 ½–½. Fournier,Frederic (2390) – Muminovic,Semsudin (2365), chess.com (team), 2009.

5.c4 dc4 6.e3 Ngf6 7.Bc4 Be7 (7...Nb6!? 8.Ba2 Bd6=+) 8.Qc2 e4 9.Nh3 0-0 10.Ng5 Nb6 11.Ne4 Ne4 12.Qe4 Nc4 13.Qc4 Be6 14.Qd4 Qd4 15.Bd4 Bc4 16.Nc3 Bd3 17.a4 Rad8 (17...c5 18.bc6 bc6 19.Nd1+=) 18.f3 (18.Ne2 Rfe8+=) 18...Rfe8 19.Kf2 Bb4 20.h4 c5 21.bc6 bc6 22.Na2 c5 (< 22...Bd2 23.Rhd1 Rd4 24.Rd2+/–) 23.Nb4 cb4 24.Rhc1 Rc8 (24...b3!? 25.Bb2 Bc2=) 25.Rc8 Rc8 26.e4 Bc2 27.Ke3 f5 28.Bb2 Rc6 29.g4 fe4 30.fe4 Rg6 31.g5 Rc6 32.d4 Kf8 33.h5 Ke7 34.Rf1 Rc7 (34...Re6!? 35.e5 Ra6+/–) 35.Rf5+- Ra7 36.d5 Ke8 37.d6 Ba4 38.Bd4 Ra6 39.Bg7 Rd6 40.g6! hg6 41.h6 gf5 42.h7 fe4 43.h8Q Kd7 44.Qh3 Kd8 1–0. miquelstone – Sandeman_be, ChessWorld.net, 2005.

5.e3 Bd6 6.c4 Ngf6 7.Qc2 0-0 8.cd5 Nd5 9.Nf3 Re8 10.d3 N7f6 11.Nbd2 Bd7 (11...Bg4 12.h3 Bf3 13.Nf3=+) 12.d4= ed4 13.Bd4 c5 14.bc6 Bc6 15.Be2 Qe7 16.Nc4 Ne4 (16...Bc7=) 17.Nfe5 (17.Bd3!? Ndf6 18.Nd6 Qd6 19.0-0=) 17...Be5=+ 18.Ne5 (worse 18.Be5 b5 19.Qe4 bc4-+) 18...Ne3 19.fe3 Qh4 20.g3 Ng3 21.hg3 Qh1 22.Kd2 Qh3 23.Qc4 Re6 24.Rf1 (worse 24.Nc6 bc6 25.Qc3 Qg3-/+) 24...Rf8 25.a4 (25.g4 b5 26.Qc3 Qg2+=) 25...Be8= (25...Qg3? 26.Nf7 Rfe8 27.Nd8+-) 26.Rf4 1-0. marekt (2345) - phildo (2060), gameknot.com, 2021.

5.e3 Bd6 6.d4 Ngf6 7.de5 Ne5 8.Nd2 0-0 9.Ngf3 Qe7 =+.

5.Nf3 Bd6 6.c4 dc4 7.e4 Ngf6 8.Qc2 0-0 9.Bc4 Qe7=.

5.Nf3 e4 6.Nd4 Nb6 7.Nc3 Bd6 8.e3 Nf6 9.Be2 Bd7 10.0-0 0-0 11.d3 Qe7 12.g3 Rad8 13.a4 Bb4 14.Qd2 c6 15.bc6 bc6 16.Qc1 c5 17.Ndb5 ed3 18.cd3 d4! 19.Na2 (19.ed4 Bb5 Decoy) 19...Na4 20.Nb4 Bb5 (20...cb4?! 21.Ra4 Bb5 22.Ra5+=; 20...Nb2?! 21.Nc2 Rb8 22.Qb2 Rb5 23.Qc1–/+) 21.Nc2 Nd5 22.Re1 de3 23.Ne3 Ne3 24.Bf1 Rfe8 (24...Bd3 25.Re3 Qb7 26.Ra4 Bf1 27.Kf1 Qb5 28.Rc4+/–; 24...Nb2?! 25.Qb2 Qd7 26.Re3–/+) 25.Re3 Qd6 26.Ba3 Qd5 27.Re4 Bc6 28.Qc4 Re4 29.Qd5 Bd5 30.de4 Be4 31.Bc1 Bc6 32.Bf4 Rd7 33.Bg2 Bb5 ½–½. Luzuriaga,Norberto Horacio (2375) – Van Daatselaar (2230), WS TT/4 Sokolsky email, 2006.

5.Nf3 e4 6.Nd4 Nb6 7.e3 Na4 8.Ra2 Nb2 9.Rb2=+ Nf6 =+.

5.Nf3 e4 6.Nd4 Ne5 7.e3 Bd6 8.d3 Nf6 9.Nc3 0-0 =+.

6.c4 dc4 7.Bc4 Nb6 8.Ba2 Bd6 9.d3 0-0 10.Nf3 Qe7 11.0-0 Bf5 12.d4 e4 13.Ne5 Be5 14.de5 Ng4 15.Bd4 Ne5 (15...Rfd8 16.Nd2=+) 16.Qh5= g6 17.Qh6 Nbd7 18.Nd2 Nf6 (18...Qa3?? 19.Bf7 Rf7 20.Ra3+-) 19.h3 Rfd8 (19...c5 20.Bc3=) 20.f3 (20.Qg5 Qd6=) 20...c5 (20...Qa3? 21.fe4 Qf8 22.Qh4+-) 21.bc6 Nc6 (21...bc6 22.fe4 c5 23.Be5 (23.ef5?! cd4 24.fg6 Ng6 25.ed4 Rd4+/–) 23...Qe5 24.ef5 Rd2 25.fg6 hg6 26.Qg6 Kh8 27.Qf6 Qf6 28.Rf6+-) 22.Bc3 Ne8 23.fe4 Be6 (23...Qa3?? 24.Bf7! Kf7 25.Qh7 Ke6 26.ef5 gf5 27.Qf5 Kd6 28.Ra3+-) 24.Be6 Qe6 25.Nf3=. Luzuriaga,Norberto Horacio (2240) – Molo,Rene Angel (2330), Pappier Memorial C, 1999.

6.c4 dc4 7.Bc4 Bd6 8.d4 0-0 9.Qc2 e4 =+.

6.c4 dc4 7.Bc4 Be7 8.Nf3 Nb6 (8...e4 9.Ng5 0-0 10.Qc2=) 9.Be2= (worse 9.Ne5 Nc4 10.Nc4 Qd5-/+) 9...e4 10.Nd4 0-0 11.d3 ed3 12.Bd3 Qd5 13.0-0 Nc4 14.Nc3 Qc5 15.Bc4 Qc4 16.Rc1 Rd8 17.h3 Qc5 (17...a4 18.Nce2 Qa2 19.Rc2+=) 18.Ne4+= Qb6 (worse 18...Ne4 19.Rc5 Nc5 20.Qc2+-) 19.Nf6 Bf6 20.Qc2 Be5 (20...c6 21.bc6 bc6 22.Qc6 Qc6 23.Rc6+=) 21.f4 Bd6 22.a4 Re8 (22...Bd7 23.Rf3+=) 23.Rf3 Bd7 (23...Kh8 24.Nb3 c6 25.Bd4+/-) 24.Nb3+/- Be6 (better 24...Bb4!?+/-) 25.Rg3+- Bf8 (25...Bb3 26.Qb3 Bf8+-) 26.Qc3 f6 27.Qf6 Qe3 (27...Bb3 28.Rg7 Kh8 29.Rh7 Kh7 30.Rc7 Qc7 31.Qh8 Kg6 32.f5 Kf5 33.Qf6 Ke4 34.Qd4 Kf5 35.Qg4) 28.Re3 gf6 29.Rc7 Bf7 30.Rg3 Bg6 31.Bf6 (worse 31.Rb7 Re1 32.Kh2 Bd6+-) 31...Re1 32.Kf2 Re4 33.Be5 Bh6 (33...Re8 34.Na5 (34.Rb7?! Ra4 35.h4 Bh6+-) 34...Ra4 35.Nb7+-) 34.Nc5 (34.Rb7?! Bf4 35.Bf4 Rf4 36.Kg1 Ra4+-) 34...Rc4 (34...Rf4 35.Bf4 Bf4 36.Rg6 hg6 37.Rb7+-) 35.Ne6 Rc7 36.Bc7 (36.Nc7?! Rd8+-) 36...Kf7 (36...Re8 37.f5 Re7 38.fg6 Re6 39.gh7 Kh7 40.Ba5+-) 37.Nc5 Bf8 (37...b6 38.Bb6 Rc8 39.Re3+-) 38.Nb7 Be7 (38...Ke8 39.b6 (worse 39.Na5 Bc5 40.Ke2 Kd7+-; worse 39.Ba5 Ra7 40.f5 Bf5 41.Re3 Kd7+-) 39...Kd7 40.Rg5+-) 39.Re3 Ra7 40.Nd8 Bd8 41.Bd8 Bc2 (41...h6 42.Bb6 Rd7 43.Ba5+-) 42.b6 Rb7 43.Re5 Ba4 44.Bc7 Bb3 45.Ra5 Ke7 (45...Be6 46.Ke3 Bd7 47.g4+-) 46.g4 (better 46.Ke3 Kf7+-) 46...Bf7 (46...Kf7 47.f5+-) 47.Ke3 Kd7 (47...h6 48.Kd4 Be6 49.Kc5+-) 48.Re5 Bg6 (48...h6+-) 49.f5 Bf7 50.f6 Bb3 51.Re7 Kc6 52.Rh7 Rb6 53.Bb6 Bg8 (53...Bd5 54.f7 Kb6 55.f8Q Bb7 56.Qb4 Kc6 57.Kd4 Ba6 58.Qc5) 54.Rg7 Be6 (54...Ba2 55.g5 Bb1 56.f7 Bc2 57.f8Q Kb6 58.Qb4 Kc6 59.Kd4 Be4 60.Qc5) 55.g5 Kd5 (55...Kd6 56.f7 Kd5 57.f8Q Bf7 58.Qf7 Kc6 59.Rg6 Kb5 60.Qb3 Ka6 61.Bd4 Ka5 62.Bc3) 56.g6 White prepares f7 56...Kc4 (56...Bg8 57.Rg8 Kc4 58.f7 Kb4 59.f8Q Kb3 60.Qc5 Kb2 61.Qb5 Kc2 62.Rc8 Kd1 63.Qe2) 57.f7 Kb3 (57...Bd5 58.f8Q Be6 59.Qc5 Kb3 60.Qb5 Kc2 61.Rc7 Bc4 62.Rc4 Kd1 63.Qb1) 58.f8Q Bc4 (58...Bd5 59.Bd4 Bc6 60.Rc7 Bg2 61.Qb8 Bb7 62.Rb7 Kc2 63.Rc7 Kd1 64.Qb1) 59.Bd4 Ba6 (59...Bb5 60.Rb7 Ka4 61.g7 Kb3 62.Qc5 Ka4 63.g8Q Bc4 64.Qgc4) 60.Qb8 Ka4 (60...Bb5 61.Qb5 Kc2 62.Rc7 Kd1 63.Qe2) 61.Ra7 (61.Ra7 Ka5 62.g7 Ka4 63.Ra6) 1-0. Vendelo – Tucuman, internet, 2021.

6.d4 ed4 7.Bd4= c5 8.bc6 bc6 9.c4 c5 10.Bc3 Bd6 11.cd5 0-0 12.Nf3 (12.Bb5 Rb8 13.Bc6 Ne5=) 12...Nb6 13.Bd3 (13.Bf6 Qf6 14.Nbd2 A) 14...Nd5? 15.Ne4 Qe6 16.Bc4+- (16.Nd6?! Qd6 17.Qc2 Bg4=); B) 14...Bf5=) 13...Nbd5+= 14.Qc2 Nc3 15.Nc3 Bb7 16.0-0 (16.Rd1 Qe7=) 16...c4 (16...Bf3 17.gf3 c4 18.Bc4 Bh2 19.Kg2=) 17.Be2 Rb8 18.Rfd1 Qe7 (18...Bf3 19.Bf3 Qc7 20.g3=) 19.Nd2 Ba3 (19...Ba6 20.Bc4 Bh2 21.Kh2 Bc4 22.Nc4 Qc7 23.Nd6+=) 20.Nc4+= (worse is 20.Bc4 Bb4+=) 20...Bb4 21.Na5 Rfc8 22.Nc4 (22.Nb7 Rc3 23.Qb2 Rcc8= (23...Rb7? 24.Ra8 Ne8 25.Rdd8+-)) 22...Qe6 23.Rd4 Bc5 24.Rf4 Bb4 25.Rh4 g5 26.Rd4 Bc5 27.Rdd1 Bb4 28.Rab1 (28.Qb3 Ba6 29.Nd2 Qb3 30.Nb3 Bc3 31.Ba6 Ba1 32.Na1 Rc3–/+) 28...Ba6 (28...Rc4 29.Bc4 Qc4 30.Qf5+/–) 29.Na2 Bc4 30.Nb4 Ba6 31.Qb2 (31.Na6 Rc2 32.Rb8 Kg7+=) 31...Rb4 32.Qb4 Be2 33.Rdc1 (33.Rd4 Bg4=) 33...Bc4 34.Qd2 Rc6 (34...Ne4 35.Qd4=) 35.Rb4 (35.Rb8 Kg7=) 35...Bd5 36.Rc6 Qc6 37.h4 (37.f3 Kg7+=) 37...h6 (37...gh4 38.Qb2 Qe6 39.Rh4+=) 38.hg5 ½–½. Cirulis,Ilmars (1970) – Nudo,Davide (1665), FICGS, 2016.

6.d4 Bd6 7.de5 Ne5 8.Nd2 0-0 9.Ngf3 Qe7=.

7.d4 dc4 8.Nd2 A) 8...e4 A1) 9.Qc2 0-0 (9...Qe7 10.Nc4 Nb6 11.Nd6 cd6=; 9...c3 10.Bc3 Qe7 11.Nc4 b6=) 10.Nc4 Nb6 11.Nb6 cb6=+; A2) 9.Bc3 a4 (9...Nd5 10.Ne4 N7b6 11.Qd2 a4=; 9...0-0 10.Nc4 Nb6 11.Qd2 a4=+; 9...Nb6 10.Nc4 Nc4 11.Bc4 Qe7=) 10.Qc2 0-0 11.Nc4 Nb6=+; A3) 9.Ne2 Nb6 (9...0-0 10.Nc4 Nb6 11.Nd6 cd6=; 9...Be7 10.Ng3 Nb6 11.Nc4 Nc4+=; 9...Ra7 10.Nc3 Nb6 11.Nce4 Be6=; 9...Qe7 10.Nc4 0-0 11.Nd6 cd6=) 10.Nc3 0-0 11.Nc4 Nc4=; A4) 9.Nc4 0-0 (9...Nb6 10.Nb6 cb6 11.Bc4 0-0=; 9...Ra7 10.Qc2 0-0 11.Nd6 cd6=; 9...Be7 10.Qc2 Nb6 11.Nd2 Bf5=; 9...b6 10.Ne2 0-0 11.Qc2 Bb7=) 10.Rc1 Nb6 11.Nd6 cd6=; B) 8...0-0 9.Nc4 e4 (9...Qe7 10.Rc1 e4 11.Nd6 cd6=; 9...Qe8 10.de5 Be5 11.Ne5 Ne5+/–) 10.Nd6 cd6 11.Ne2 Nb6=; C) 8...ed4 9.Bd4 Qe7 (9...Bc5 10.Nc4 Bd4 11.Qd4 0-0=; 9...Ne5 10.Nc4 Nc4 11.Bc4 Be6=; 9...c3 10.Nc4 Be7 11.Bc3 a4=; 9...Be5 10.Be5 Ne5 11.Nc4 Qe7=; 9...a4 10.Nc4 Be7 11.Nf3 0-0+=) 10.Nc4 Bc5 11.Nf3 0-0=; D) 8...c3 9.Bc3 e4 (9...0-0 10.Nc4 ed4 11.Bd4 Bc5=; 9...ed4 10.Bd4 0-0 11.Nc4 Be7=; 9...a4 10.de5 Ne5 11.Ngf3 Qe7=; 9...Nd5 10.Bb2 0-0 11.Ne4 N5f6=; 9...Qe7 10.Nc4 0-0 11.Be2 Ne4=) 10.Nc4 Nb6 11.Qd2 a4=.

7.d4 dc4 8.Nf3 ed4 9.Qd4 (9.Bd4 Nb6 (9...0-0 10.Bc4 c5 11.bc6 bc6=; 9...Qe7 10.Bc4 0-0 11.0-0 c5=; 9...Nc5 10.Bc4 0-0 11.0-0 Bg4=; 9...c3 10.Be2 0-0 11.0-0 Qe7=; 9...c5 10.bc6 bc6 11.Nbd2 0-0=) 10.Bb6 cb6 11.Bc4 0-0=) 9...Qe7 (9...0-0 10.Nbd2=+ (10.Bc4 Nc5 11.0-0 Bg4=) 10...Bc5 11.Qc4 Bd6=; 9...Nb6 10.Nbd2 c3 11.Bc3 Qe7=; 9...Nc5 10.Bc4 Bg4 11.Nbd2 0-0=; 9...a4 10.Nbd2 c3 11.Qc3 Nc5=) 10.Nbd2 Nc5 11.Bc4 (< 11.Nc4 Nb3 12.Nd6 cd6–/+) 11...0-0 (11...Bg4=) 12.0-0 Bf5 (12...Rd8 13.Qh4 h6 14.Rfe1=) 13.Qh4= Nfd7 (13...h6 14.Be2=) 14.Qe7 (14.Qd4 Qf6=) 14...Be7 15.Rfc1 a4 (15...Nb6 16.Be2=) 16.Nd4 Bg6 17.f4 (17.Ne2 Nb6 18.Nf4 Nc4 19.Rc4 Rfd8=) 17...Bf6 (17...Rad8 18.g4 h6 19.N4f3=) 18.g4 h6 19.Rc3 (19.Bd5 Rfe8 20.f5 Bh7=) 19...Ne4 20.Rc2 Rad8 (20...Rae8 21.N2f3=) 21.Ba2 (21.f5 Nd2 22.Rd2 Ne5=) 21...Nd2 (21...Nec5 22.f5 Bh7 23.Nc4=) 22.Rd2 Nc5 23.Rc1 b6 24.f5 Bh7 25.Kg2 Rd7 26.Kf3 Re8 (26...h5 27.h3= (< 27.gh5 Bf5 28.Rf1 Re8–/+)) 27.Bb1 g5 (27...g6 28.Rcd1=) 28.h3 (28.Rc4 Rde7 29.Re2 Rd7+=) 28...Be5 (28...Rde7 29.Re2+=) 29.Rc4 (29.Bc3 Bf6+=) 29...f6 (29...Red8 30.Re2 Re8 31.Bc3+=) 30.Rcc2= Kh8 31.Ba2 (31.Nc6 Rd2 32.Be5 Rd1 33.Bf6 Kg8 34.Ba2 Kf8+=) 31...Bg8= 32.Bg8 Kg8 33.Nc6 Rd2 ½–½. Luzuriaga,Norberto H – Etchechoury,Guillermo, XVI Campeonato Argentina, Final, 2002.

7.d4 dc4 8.Nf3 e4 A) 9.Ne5 Qe7 (9...Nb6 10.Nc4 0-0 11.Nd6 cd6=; 9...0-0 10.Nc4 Nb6 11.Nd6 cd6=; 9...Nd5 10.Qc2 Qh4 11.g3 Qe7+=; 9...c3 10.Bc3 0-0 11.Nc4 Nb6=; 9...Ra7 10.Nc4 0-0 11.Nbd2 Nb6=) 10.Nc4 Nb6 11.Nb6 cb6=; B) 9.Nfd2 Qe7 (9...0-0 10.Nc4 Nb6 11.Nd6 cd6=; 9...Be7 10.Qc2 Nb6 11.Nc4 0-0=; 9...Nb6 10.Nc4 Be6 11.Nbd2 Nc4=; 9...Ra7 10.Nc3 Nb6 11.Nce4 Ne4=; 9...Rb8 10.Nc4 b6 11.Nc3 Bb7+=) 10.Nc4 Nb6 11.Nb6 cb6=.

7.d4 dc4 8.Nf3 Qe7 A) 9.Bc4 0-0 (9...e4 10.Nfd2=+ Nb6 11.Qc2 Nc4=) 10.de5 Ne5 11.Nbd2 Bg4=+; B) 9.Qc2 ed4 (9...0-0 10.Nbd2 e4 11.Ng5 Nb6=; 9...e4 10.Nfd2 Nb6 11.Nc3 0-0=; 9...a4 10.de5 Ne5 11.Nbd2 Nd3=+) 10.Nd4 Nb6 11.Nd2 c3=+; C) 9.Be2 0-0 (9...a4 10.0-0 Ng4 11.h3 e4=; 9...e4 10.Nfd2 Nb6 11.0-0 0-0=; 9...Rb8 10.Nfd2 Nb6 11.Nc4 Nc4=; 9...h6 10.0-0 0-0 11.Nfd2 Nb6=; 9...Qe6 10.Qc2 e4 11.Nfd2 Nb6=) 10.0-0 e4 11.Nfd2 Nb6=+; D) 9.Qc1 0-0 (9...e4 10.Nfd2 Nb6 11.Nc4 Be6=+; 9...c3 10.Nc3 0-0 11.Be2 Rd8=; 9...ed4 10.Bd4 Ne5 11.Be5 Be5=; 9...a4 10.de5 Ne5 11.Ne5 Be5=; 9...Ra7 10.de5 Ne5 11.Ne5 Be5=) 10.de5 Ne5 11.Ne5 Be5=+; E) 9.Nfd2 c3 (9...ed4 10.Bd4 Be5 11.Nc4 Bd4=; 9...0-0 10.Nc4 e4 11.Nd6 cd6=; 9...e4 10.Nc4 Nb6 11.Nb6 cb6=; 9...Nb6 10.Nc4 Nc4 11.Bc4 e4=) 10.Bc3 ed4 11.Bd4 0-0=.

7.d4 ed4 8.Bd4 0-0 9.Nf3 Qe7 10.cd5 Rd8 11.Qb3 a4 12.Qa2 Nb6 13.Bd3 Nbd5 14.0-0 Be6 15.Qb2 c5 16.bc6 bc6 17.Nbd2 c5 18.Be5 Be5 19.Ne5 Qc7 20.Rab1 ½–½. Bendig,Frank (2205) – Hellbing,Bernd (2370), WC–2010–T–00006, 2009.

7.Be2 0-0 8.d4 e4 9.Nfd2 (9.Ne5 Re8 10.Nd7 Qd7 11.c4 dc4 12.Nd2 Qb5 13.Nc4) 9...Nb6 (9...c6 10.c4= c5 11.cd5 Nb6 12.dc5 Bc5 13.Nc3) 10.c4 dc4 (10...Nc4 11.Nc4 dc4 12.Nd2 Qe8 13.Nc4) 11.Nc3 Qd7 (11...Bf5 12.Nc4 (12.0-0 Re8 13.Nc4) 12...Nc4 13.Bc4=; 11...Qe7 12.Nc4 Nc4 13.Bc4) 12.Nc4 (12.Qc2 Re8 13.Nc4) 12...Nc4 13.Bc4 Qf5 14.0-0 (14.Qc2 Be6 15.d5 Bd7=) 14...Qg5 15.Re1 Bg4 16.Be2 Bh3 (16...Qh4 17.Kf1 Be2 18.Ke2 Qh5 19.Kd2 Qh2 20.Rg1–/+) 17.Bf1 Rfe8 (17...Be6 18.f3 Qh5 19.f4=) 18.Kh1 (18.Qc2 Rad8=) 18...Bf5 (18...Bc8 19.Qd2+=) 19.h3= Ng4 20.Qd2 (20.hg4 Qh6 Mate attack) 20...Nh2 21.Ne2 (21.Be2 Nf3 22.Ne4 Be4 23.Bf3 Bf3 24.gf3 Qf5–+ (24...Qb5?! 25.d5–/+)) 21...Qh6 22.Ng1 Re6 23.a4 Nf3?? 24.gf3+- ef3 25.d5 Rg6 26.Qd4+- f6 27.h4?? Qh5 28.Rad1 Rg4 29.Nf3 Re8 30.Be2 Ree4 31.Qe4 Be4 (31...Be4 32.Bf6 gf6 33.Rg1 Qh4#) 0–1. Brueske,Thomas (2360) – Raap,Christian (2285), remoteschach.de, 2010.

7.Nf3 0-0 8.Nc3 c6 9.d4 ed4 10.Nd4 Ne5 11.cd5 cd5 12.Be2 Re8 13.Qc2 Be6 14.0-0 Rc8 15.Nf5 Bb8 16.Rad1 Qc7 17.f4 Exerts pressure on the isolated pawn (17.Ng3 Nc4 18.Rc1 Qd7 19.Bc4 Rc4=+) 17...Nc4 (17...Ne4 18.Nd4 Nc3 19.Bc3 Qc3 20.Qc3 Rc3 21.fe5 Re3 22.Ne6 fe6–+ (22...Re2?! 23.Nf4 Ra2 24.Rd5–/+; 22...Re6?! 23.Bf3 Ba7 24.Bd5 R6e5 25.Bf7 Kf8 26.Kh1=)) 18.Bc4=+ Qc4 (worse 18...dc4 19.Nd6 Qb6 20.Ne8 Qe3 21.Kh1 Re8 22.Rf3+=) 19.Rf3? (better 19.Nd4=+) 19...Ne4?? (better 19...Bf5 20.Qf5 Qb3–+) 20.Ng7+- Bg4? (better 20...Re7!? 21.Ne6 Re6+=) 21.Ne8+- Bf3 (21...Re8 22.Rd5 Bf3 23.gf3 Nc3 24.Rg5 Kf8 25.Bc3+- (25.Qc3?! Qc3 26.Bc3 Re3 27.Ba5 Bd6+=)) 22.Rd4 Qc5? (22...Qb5 23.gf3 Qe8 24.Qg2 Kf8 25.fe4 Ba7+-) 23.gf3 Nc3 (23...Re8 24.Qg2 Kf8 25.Nd5+- (25.Ne4?! de4 26.fe4 Qb6+-)) 24.Nf6 Kg7 25.Nd5 (25.Nh7?! f6 26.Rd3 Ne2 27.Qe2 Kh7+-) 25...Kh6 (25...Rg8 26.Nc3 Bc7 27.Kf1+-) 26.Nf6 (26.Qg2 Ne2 27.Kf1 f6 28.Qh3 Kg7 29.Qd7 Kf8+-) 26...Bf4 (26...Kg7 27.Nd7 Qe7+-) 27.Qh7 (27.Qh7 Kg5 28.Ne4 Ne4 29.h4 Kf6 30.Rd7 Nc3 31.Bc3 Qc3 32.Qf7 Ke5 33.ef4) 1–0. Steffens,O (2250) – Bejaoui,A (2130), 24th Schloss Open, 2018.

8.d4 0-0 9.Ne2 ed4 10.Nd4 Ne5 11.Nd2 Bg4 12.Qa4 A) 12...Re8 A1) 13.Rc1 Nb6 14.Qc2 Bh5 15.Nf5 Bg6=+; A2) 13.Qc2 Rc8 14.Nc4 Qh4 15.g3 Qf6=+; A3) 13.Nc4 Nf4 14.Ne5 Be5 15.h3 Bh5=+; A4) 13.Qb3 Bc5 14.Nc4 Qg5 15.h3 Nc4=+; A5) 13.Ne4 Bf8 14.Rc1 Qh4 15.Ng3 Ng6=; B) 12...Nd7 B1) 13.Nc4 Re8 14.Nd6 cd6 15.Rc1 Nc5=; B2) 13.N2f3 Qe8 14.Qc2 N7f6 15.Be2 Rc8=; B3) 13.N4f3 N5f6 14.Ne4 Bf3 15.Nd6 Bg2=; B4) 13.Qb3 N7f6 14.Bc4 a4 15.Qc2 Re8=; B5) 13.Ne4 Qe7 14.Nd6 cd6 15.Qb3 N5f6=; C) 12...Qe7 13.Ne4 Nb6 14.Qc2 Rfc8 15.f3 Bd7=; D) 12...Nb6 D1) 13.Qb3 Rc8 14.Ne4 a4 15.Qc3 Qh4=; D2) 13.Qc2 Rc8 14.N2f3 Re8 15.Rd1 c6=.

8.d4 0-0 9.Ne2 ed4 10.Nd4 Ne5 11.Nd2 Bg4 12.Qb3 Nb6 13.Ne4 Re8 14.h3 Bh5 15.Nf5 Bg6 16.Neg3 h5 17.Nd6 cd6 18.Be2 h4–/+ 19.Nh5 Qg5 20.Nf4=+ Be4 21.f3 Ng6 22.0-0 Bf5 23.Ng6 Qg6 24.Bd4 Bh3 25.Rf2=+ Be6 26.Qd3 Qd3 27.Bd3 Nc4 28.Rc2= d5 29.e4 Nd6 30.ed5 Bd5 31.Rc5 Be6 32.Rh5 h3 33.g4 Rac8= 34.a4 Bc4 ½–½. Luzuriaga,Norberto Horacio – Tosti,Ricardo, Bibas Memorial ICCF, 2001.

8.d4 0-0 9.Ne2 ed4 10.Nd4 Ne5 11.Nd2 Bg4 12.Qb3 Be6 A) 13.e4 a4 (13...Nf4 14.Qc3 Bd7 15.g3 Nh5+/–) 14.Qc2 Nb6 15.Ne6 fe6=; B) 13.Ne6 fe6 14.e4 a4 15.Qc2 Nb6=; C) 13.Ne4 Qh4 (13...Qd7 14.Ne6 fe6 15.Nd6 cd6+=; 13...a4 14.Qc2 Qh4 15.g3 Qh5=; 13...Rc8 14.Rd1 Qe7 15.Ng3 Qe8+=) 14.Nd6 cd6 15.Nf5 Qd8=; D) 13.Rd1 Qe7 (13...a4 14.Qc2 Bg4 15.Be2 Qd7=; 13...Qd7 14.Ne6 fe6 15.Ne4 Qf7+=) 14.Ne6 fe6 15.Ne4 a4=; E) 13.Nc4 E1) 13...Qh4 14.Nf5 Qg4 15.Nh6 gh6+=; E2) 13...Nc4 14.Bc4 Qg5 15.0-0-0 a4+=; E3) 13...Qf6 14.Ne6 (14.Rd1=+ Nb6 15.Ne6 Qe6=) 14...a4 15.Qa2 Qe6+/–; E4) 13...Qd7 14.Ne6 Qe6 15.Nd6 a4+/–; E5) 13...Qe7 14.Ne6 Qe6 15.Nd6 a4+/–; E6) 13...a4 14.Qc2 Nc4 15.Bc4 Qe7=.

8.d4 0-0 9.Ne2 ed4 10.Nd4 Ne5 11.Nd2 Bg4 12.Qb3 Be7 A) 13.Qc2 Re8 (13...Bf6 14.Rc1 Re8 15.Ne4 Bh4=; 13...Qd7 14.h3 Bh5 15.Qf5 Qf5=; 13...f6 14.Nc4 Re8 15.f3 Bh5+=; 13...Bh4 14.g3 Bf6 15.Bg2 c5=; 13...Nf6 14.Nc4 Bd6 15.Ne5 Be5+=) 14.Ne4 Bh4 15.Ng3 Rc8=+; B) 13.e4 Nf4 14.Qg3 Bd6 15.Rc1 Bf3=+; C) 13.Qa4 Qd7 (13...Qd6 14.h3 Bd7 15.Rd1 Rfd8=; 13...Bh5 14.Nc4 Nd7 15.Nf5 Bf6=; 13...Bf6 14.h3 Bh5 15.Ne4 Bg6=; 13...Nb6 14.Qc2 Bd6 15.Ne4 Rc8=; 13...f6 14.h3 Bc8 15.Rd1 Nb6+=) 14.h3 Bh5 15.N4f3 Nf3=; D) 13.Nc4 Bf6 (13...Ng6 14.Bd3 Bc5 15.0-0 Qg5+=; 13...a4 14.Qc2 Ng6 15.Bd3 Bf6+=; 13...Nd7 14.Qc2 Nc5 15.Ne5 Bh5+=; 13...Bd6 14.Nd6 Qd6 15.h3 a4=; 13...Nc4 14.Bc4 Nb6 15.Bd3 Bd6+=) 14.Ne5 Be5 15.Bc4 Nb6=; E) 13.h3 Bh5 (13...Bc8 14.Rd1 Re8 15.N2f3 a4+=; 13...a4 14.Qc2 Bc8 15.Be2 Bd6+=) 14.Nf5 Bf6 15.Ne4 Re8=.

8.d4 0-0 9.Ne2 ed4 10.Nd4 Ne5 11.Nd2 Bg4 12.Qb3 Nf6 A) 13.Qc2 Re8 (13...Rc8 14.Nc4 c6 15.Nd6 Qd6=; 13...Qe7 14.Nc4 Rfc8 15.Ne5 Be5=; 13...Bh5 14.Nc4 Nc4 15.Bc4 Bg6=; 13...a4 14.Nc4 Qd7 15.h3 Be6+=; 13...c5 14.Nf5 Re8 15.Nd6 Qd6=) 14.Nc4 Nc4 15.Bc4 Qe7=; B) 13.f3 Bd7 (13...Bc8 14.Nc4 Nc4 15.Bc4 a4=; 13...a4 14.Qc2 Bd7 15.Nc4 Nc4=; 13...Bh5 14.Nf5 Bg6 15.Nd6 cd6=) 14.Rd1 Re8 15.e4 a4=; C) 13.Qa4 Qe7 (13...Re8 14.h3 Bd7 15.Rd1 Nd5=; 13...Ned7 14.Nc4 Be7 15.Qc2 Qe8+=; 13...Nfd7 14.Ne4 Nb6 15.Qc2 Rc8=; 13...Qd7 14.Nc4 Rfd8 15.Nd6 Qd6=; 13...Qe8 14.Nc4 Nc4 15.Bc4 Qe4=) 14.Nc4 Nc4 15.Bc4 Ne4=; D) 13.f4 Ned7 14.h3 Nc5 15.Qc2 Bd7=+; E) 13.Nc4 Re8 (13...Qe7 14.h3 Bh5 15.Nf5 Qe6=; 13...a4 14.Qc2 Qd7 15.h3 Be6+=; 13...Nc4 14.Bc4 Ne4 15.Qc2 Qe7+=; 13...Nd5 14.Nd6 Qd6 15.h3 a4=; 13...Ne4 14.Ne5 Be5 15.Qc2 Nf6+=) 14.Nd6 Qd6 15.h3 Bh5=.

8.d4 0-0 9.Ne2 ed4 10.Nd4 Ne5 11.Nd2 Bg4 12.Qc2 Re8 A) 13.Ne4 Rc8 14.Qa4 Nb6 15.Qa5 Nec4=+; B) 13.Nc4 Rc8 14.h3 Qh4 15.g3 Nc4=+; C) 13.Rb1 Bh5 14.e4 Bg6 15.Qb3 Nf6=+; D) 13.Nf5 Rc8 14.Bd4 c5 15.Nd6 Qd6=+; E) 13.Rc1 Qh4 14.g3 Qh6 15.Be2 Be2=+.

8.d4 0-0 9.Ne2 ed4 10.Nd4 Ne5 11.Nd2 Bg4 12.N2f3 A) 12...Bf3 A1) 13.Nf3 Qf6=+ 14.Ne5 Be5 15.Be5 Qe5=; A2) 13.gf3 Qh4 14.Qe2 Rfe8 15.0-0-0 Rad8=; B) 12...Qe7 B1) 13.Qc2 Rfd8 14.Ne5 Be5 15.h3 Bh5=; B2) 13.h3 Nf3 14.gf3 Bc8 15.Qc2 Rd8=; B3) 13.Qa4 Rfd8 14.Rd1 Nb6 15.Qb3 a4=+; B4) 13.Be2 Rfd8 14.0-0 c5 15.bc6 bc6=; C) 12...Qf6 C1) 13.h3 Nf3 14.gf3 Bh5 15.Bc4 Nb6=+; C2) 13.Rc1 Qe7 14.Qb3 Rfd8 15.Ne5 Be5=+; C3) 13.Be2 Bd7 14.Ne5 Be5 15.Bf3 c6=; D) 12...Re8 D1) 13.Qc2 Bf3 14.Nf3 Nf3 15.gf3 Be5=+; D2) 13.h3 Bf3 14.Nf3 Qf6 15.Nd4 c5=; D3) 13.Qd2 Nf3 14.gf3 Bd7 15.Bc4 c6=+; D4) 13.Be2 Qe7 14.h3 Bd7 15.Ne5 Be5=; E) 12...c5 E1) 13.h3 Bh5 14.Nc2 Nf3 15.gf3 Nf6=+; E2) 13.bc6 bc6 14.Qc2 Rb8 15.Ne5 Be5=+.

8.d4 0-0 9.Ne2 Re8 10.Nd2 N7b6 11.de5 Be5 12.Be5 Re5 13.Nf3 Re8 14.Ned4 Bg4 15.Be2 Nc3 16.Qc2 Ne2 17.Qe2 Qf6 18.0-0 Nd5 19.Qc2 h6 20.Rac1 Rad8 21.Nd2 Bh5 22.Ne4 Qe5 23.Ng3 Bg6 24.Qa4+= h5 25.Nf3 Qf6 26.Rfd1 Qb2 27.Qa5 b6 28.Qd2 Qb5 29.Nh4 Qb3 30.Ng6 fg6 31.Qc2 Qc2 32.Rc2 h4 33.Nf1 Rd7 34.h3 Ne3 35.Ne3+= Rd1 36.Nd1 Re1 37.Kh2 Rd1 38.Rc7 ½–½. pierre (2070) – jaskier (2135), internet, 2006.

5.Bc4 de3 6.de3 Qd1 7.Kd1 c6 8.Nc3+= cb5 9.Nd5?? bc4–/+ 10.Nc7 Ke7 11.Na8= Nf6 12.f3 Ke8 13.Nc7 Kd8 14.Nb5 Bc5 15.Ne2 Ke7 16.Nec3+= Rd8 17.Ke2 Na6 18.Rd1 Rd1 19.Kd1 Bd7 20.Ke2 e4 21.fe4 Ne4 22.Ne4 Bb5 23.Rb1 Bc6 24.Nc5 Nc5 25.Bd2 Be4 26.Rb5 Ne6 27.g4 a4+/– 28.Rb6 Bc6 29.Bb4 Kd7 30.Bc3 Kd6 31.h4 f6 32.Bb4 Kc7 33.Ba5+/– Kd6 34.Bc3 Nc5 35.Bd4 Ne6 36.Bc3 ½–½. marus1 – spok, internet, 2001.

5.d3 A) 5...c6 6.Nf3 cb5 7.Ne5 Nc6 8.Nf3=; B) 5...Nd7 6.ed4 ed4 7.Nf3 Nc5 8.Be2=; C) 5...Qf6 6.Nf3 Bg4 7.Be2 Bc5 8.ed4=; D) 5...Bd6 6.Be2 c5 7.Nf3 Nf6 8.0-0=; E) 5...Bc5 6.Nf3 Qe7 7.ed4 ed4 8.Qe2=.

5.ed4 A) 5...ed4 6.Bc4 Qf6 7.Qe2 Be7 8.Bb2+=; B) 5...Qd4 6.Nc3 Bd6 7.Nf3 Qg4 8.b6=.

5.Qe2 A) 5...Bf5 6.Nf3 de3 7.Qe3 f6 8.d4+=; B) 5...Ne7 6.ed4 ed4 7.Nf3 Be6 8.c3=; C) 5...de3 6.Qe3 Bd6 7.Nf3 Nd7 8.Bb2=; D) 5...Be6 6.Nf3 Qd5 7.c4 dc3 8.Nc3+=; E) 5...Nf6 6.Nf3 de3 7.Qe3 Ng4 8.Qc3=.

5.Nf3 de3 6.de3 Qd1 7.Kd1 Nd7= 8.Bb2=.

5.Qh5 A) 5...Bd6 6.ed4 ed4 7.Bb2 Qf6 8.Nf3=; B) 5...Qe7 6.Qd1 de3 7.de3 Be6 8.Nf3=.

5.Bb2 Nd7 6.d4 (6.Be2 Ngf6 7.Nf3 c5 8.bc6=+ –0.47; 6.Nf3 Ngf6 7.Be2 c5 8.bc6=+ –0.47; 6.c4 dc4 7.Bc4 Ngf6 8.d4=+ –0.41/9; 6.Qg4 Nf8 7.Qd1 Nf6 8.Nf3=+ –0.47; 6.Nc3 Ngf6 7.Nf3 0-0 8.Be2=+ –0.47) 6...Ngf6 7.c4 dc4 8.Nf3 =+.

5.Bb2 Be6 6.Nc3 (6.Be2 Nf6 7.Nf3 Nbd7 8.0-0=+ –0.41; 6.Nf3 Nd7 7.Be2 Ngf6 8.0-0=+ –0.41; 6.d4 e4 7.c4 Nf6 8.cd5=+ –0.34/9; 6.d3 Nd7 7.Nf3 Ngf6 8.Be2=+ –0.44; 6.Qh5 Nh6 7.Nf3 Nd7 8.h3=+ –0.41/9) 6...Nf6 7.Nf3 0-0 8.Be2 =+.

5.Bb2 Qe7 6.c4 Nf6 7.d3 (7.d4 dc4 8.Bc4 Nbd7=) 7...0-0=+ 8.h3 (8.d4 ed4 9.Qd4 Be6=+) 8...Rd8 9.Nd2 c6 10.d4 ed4 11.Bd4 c5 (11...Be6 12.Qa4-/+) 12.Bf6=+ Qf6 13.Qc1 (better 13.cd5!? Be5 14.Ra2=+) 13...Be5 14.Ra2 Be6 (14...d4 15.ed4 Bd4 16.Ngf3-/+) 15.Nb1 (15.Ngf3 Nd7=+) 15...b6 (15...dc4 16.f4 Qh4 17.Rf2-/+) 16.Nf3 Bc7 17.a4 (17.Bd3 Nd7=+) 17...Nd7-/+ 18.Be2 Ne5 19.Nbd2 (19.Ne5 Be5 20.Bf3 Rac8-/+ (20...dc4?! 21.Ba8 Ra8 22.f4 Qh4 23.Rf2=)) 19...Qg6 (19...d4 20.0-0-/+) 20.g4 (20.Ne5 Be5 21.Bf3 dc4=+) 20...Nd3 21.Bd3 Qd3 22.Ra3 Qg6 23.Rc3 (23.Qb1 Qb1 (23...dc4?! 24.Qg6 hg6 25.Ke2=+) 24.Nb1 dc4-/+) 23...Rd7 (23...d4 24.ed4 cd4 25.Rc2-+) 24.Nh4 (24.Qc2!? Qf6 25.cd5 Bd5 26.e4-/+) 24...Qf6-+ 25.Ng2 d4 26.Rd3? (better 26.ed4 cd4 27.Rd3-+) 26...de3 27.Re3 Rad8 28.Re2 (28.Ne4 Rd1! 29.Ke2 Bc4 30.Qc4 Qb2 31.Kf3 Rh1 32.h4-+) 28...Qg5 (better 28...Bc4 29.g5 Qd4-+) 29.Ne3 f5 (29...Bf4 30.0-0-+) 30.h4-/+ Qf6 (30...Qg6 31.Qc2 f4 32.Qg6 hg6 33.Nd5 Bd5 34.cd5 Rd5 35.Rh3-+) 31.g5 (31.gf5!? Bf5 32.Nd5-/+) 31...Qd4 32.Nc2?? (better 32.h5-+) 32...Qc3 33.0-0 (33.Re3 Qd2 34.Qd2 Rd2 35.Re6 Rd1 36.Ke2 R8d2 37.Ke3 f4 38.Kf3 Rh1 39.Kg2 f3 40.Kh1 Rc2 41.Re1-+) 33...Rd2 34.Rd2 Qd2 (better 34...Rd2 35.Qa3 Qc4-+) 35.Qd2 Rd2 36.Ne3 f4 37.Ng2 (37.Nd5 Bd5 38.cd5 f3-+) 37...Bc4 38.Re1 Kf7 39.Ra1 Bb3 40.Kf1 Rd1 41.Rd1 Bd1 (41...Bd1 42.Ke1 Ba4-+) 0-1. petrobbo (2000) - kovacic (2260), ChessWorld.net, 2013.

5.Bb2 Ne7 6.c4 (6.d4 Nd7 7.de5 Ne5 8.Nf3=) 6...0-0 7.d4 ed4 8.Qd4 =.

5.Bb2 Bf5 6.c4 (6.d4 e4 7.c4 Nf6 8.Nc3=+) 6...Nf6 7.cd5 Nd5 8.Qf3 =.

5.c4 A) 5...Nf6 6.Qc2 0-0 7.Bb2 dc4 8.Bc4=+; B) 5...Be6 6.cd5 Bd5 7.Nc3 Be6 8.Qf3=; C) 5...Ne7 6.d4 ed4 7.Qd4 f6 8.Nf3=; D) 5...d4 6.Qc2 Qe7 7.Nf3 de3 8.de3=; E) 5...dc4 6.Bc4 Nf6 7.Bb2 Nbd7 8.d4=+.

5.Be2 A) 5...Nf6 6.Nc3 d4 7.ed4 ed4 8.Na4=+; B) 5...Ne7 6.Bb2 c5 7.bc6 Nbc6 8.Nc3=; C) 5...Bf5 6.c4 dc4 7.Bc4 e4 8.Bb2=+; D) 5...c5 6.d4 cd4 7.ed4 Nf6 8.de5=; E) 5...e4 6.Bb2 Nf6 7.d3 Be6 8.Nd2=+.

5.Nf3 A) 5...e4 6.Nd4 Nf6 7.Bb2 0-0 8.Be2=+; B) 5...Ne7 6.d4 Nd7 7.c4 dc4 8.Bc4=; C) 5...Be6 6.c4 dc4 7.Qc2 Nd7 8.Bc4=; D) 5...Bf5 6.c4 Nf6 7.Nc3 dc4 8.Bc4=; E) 5...Nf6 6.Bb2 Nbd7 7.Be2 c5 8.0-0=+.

6.Ra2 Nbd7 7.d4 0-0 8.c4 =+.

6.Nc3 0-0 7.Nf3 Nbd7 8.Be2 =+.

6.c4 0-0 7.cd5 Nd5 8.d4 e4 9.Nc3 Nc3 10.Bc3 Qe7 11.a4 b6 12.Ne2 Bb7 13.Ng3= Qe6 14.Be2 Nd7 15.0-0 c6 16.bc6 Bc6=+ 17.Rc1 Nf6 18.Bb2 Rfc8 19.Bc4 Bd5–/+ 20.Bd5 Qd5 21.Qe2 g6 22.Rc2 Rc2 23.Qc2 Rb8 24.Ba1 b5 25.ab5 Rb5 26.Rc1 Rb8 27.Ne2 Qg5 28.Nc3 Rc8=+ 29.Bb2 Qf5 30.Qe2 Rb8 31.h3 h5 32.Ra1= Bb4 33.Na4 Qd5 34.Nc5 Bc5 35.dc5+/– Nd7 36.Ra5 Nc5 37.Qc2 Qb7 38.Rc5 Qb2 39.Qe4 Qe2 40.Qf4+- Rb1 41.Kh2 Qa6 42.Re5 Kg7+/– 43.Rd5 (43…Qf6 44.Kg3+/–; 43.Re8 Qa1+/–) 1–0. Heres,Henri – Owens,Jim, IECG, 1997.

6.c4 dc4 7.Bc4 Nbd7 8.d4 =+.

6.d4 e4 7.c4 Be6 8.cd5 =+.

6.Be2 Nbd7 7.Nf3 0-0 8.0-0 =+.

6.Nf3 e4 7.Nd4 0-0 8.Be2 =+.

5.Bb2 A) 5...f6 6.d4 Nd7 7.de5 fe5 8.c4=; B) 5...Qd6 6.Nf3 Nd7 7.Be2 Be7 8.Ne5=; C) 5...Qf6 6.f4 Bd6 7.Nf3 Nd7 8.Be2=.

5.d4 A) 5...e4 6.Ne2 Bd6 7.Nf4 Bf4 8.ef4=; B) 5...ed4 6.ed4 Nf6 7.Nf3 Bd6 8.Bd3=; C) 5...Qf6 6.de5 Qe5 7.Qd4 Qf5 8.Nc3=; D) 5...Nd7 6.de5 Ne5 7.Bb2 Qd6 8.Nf3=; E) 5...Bd6 6.Nf3 e4 7.Nfd2 Nf6 8.c4=.

5.Be2 A) 5...Qg5 6.g3 Qg6 7.Bb2 Nd7 8.f4=+; B) 5...Bd6 6.Bb2 Nf6 7.Nf3 Nbd7 8.0-0=+; C) 5...Nf6 6.Nf3 Bd6 7.Bb2 Nbd7 8.0-0=+; D) 5...Nd7 6.Nc3 Ngf6 7.Nf3 Bd6 8.d3=+; E) 5...e4 6.Bb2 Nd7 7.Bd4 Nh6 8.d3=+.

5.Nf3 Bd6 6.c4 dc4 7.Qc2 Nf6 8.Bc4=.

5.Nf3 Qf6 6.d4 e4 7.Nfd2 Qg6 8.c4=.

5.Nf3 Bg4 6.h3 Bf3 7.Qf3 e4 8.Qf5=.

6.d3 Nd7 7.Nf3 Ngf6 8.Be2 =+.

6.d4 e4 7.c4 Nf6 8.cd5 =+.

6.Be2 Nf6 7.Nf3 Nbd7 8.0-0 =+.

6.Ne2 Nf6 7.d4 e4 8.Nf4 =+.

6.Nf3 Nd7 7.Be2 Ngf6 8.0-0 =+.

6.Nf3 Nd7 7.Be2 Nh6 8.d3 0-0 9.c4 c6 10.cd5 cd5 11.Nc3 Rc8 12.0-0 Qe7 13.Kh1 Rc7 14.Ng1 f5 15.d4 e4 16.f4 Ng4 17.Bg4 fg4 18.g3 Nb6 19.Qb3 Rf5 20.Bc1 h5 21.Nb1 h4 22.Ne2 g6 23.Qd1 Rh5 24.Rf2 Qe8 25.Nec3? hg3–+ 26.Rg2 Rch7 27.Raa2 Qe7 28.Rg3–/+ Rh3 29.Rag2 Qh4 30.Qg1 Nc4 31.Nd5 Bd5 32.Rg4 Rh2?? 33.Rh2+- Qh2 34.Qh2 Rh2 35.Kh2 Kh7 36.Nc3 Be6 37.Rg2 Bf5 38.Kg3 Kg7 39.Ra2 g5 40.Ne2 Kf6 41.Nc3?? Ke6?? 42.b6 gf4 43.ef4 Kd7 44.Nb5 Nb6 45.Nd6 Kd6 46.Rb2 Kc6 47.Rc2 Kd6 48.Rc5 Bd7 49.Ra5 Nd5 50.a4 b6 51.Ba3 Kc6 52.Ra8 Kb7 53.Rh8 Ba4 54.Rh7 Kc6 55.Rh6 Kc7 56.Bd6 Kd7 57.Be5 Bb3 58.Rd6 Ke7 59.Rh6?? e3 60.Bd6 Kd7 61.f5 Bc4 0–1. Satka,Martin – Mueller,Heinz (1830), 10sen.Brandenburg op, 2001.

6.Qh5 Nh6 7.h3 Nd7 8.Nf3 =+.

6.Nc3 Ngf6 7.Nf3 Bd6 8.Be2 =+.

6.d4 e4 7.c4 dc4 8.Nc3 =+.

6.Be2 Bd6 7.Nf3 Ngf6 8.0-0 =+.

6.Ne2 Ngf6 =+.

6.Nf3 Bd6 7.c4 dc4 8.Qc2 Qf6 9.Bc4 Bc4 10.Qc4 Qg6 11.0-0 e4 12.Nh4 Qg4 13.g3 Nb6 14.Qc2 Ne7 15.Nc3 f5 16.f3 ef3 17.Nf3 0-0 18.Rf2 Nc4 19.Raf1 Nb2 20.Qb2 Kh8 21.Nd4 c5 22.bc6 bc6 23.Qb3 Rad8 24.Nce2 Qe4 25.Nf4 Rb8 26.Qc3 Qe5 27.Nd3 Qd5 28.g4 c5 29.Nf5 Nf5 30.Rf5 Rf5 31.Rf5 Rb1 32.Nc1 Qe6 33.h3 a4 34.Kg2 h6 35.Kf2 c4 36.Qc2 Rb8 37.Ne2 Ba3= 38.Nf4 Qc6 39.g5 hg5 40.Rg5 Kg8 41.Rh5 Rf8 42.Qh7 Kf7 43.Rf5 Ke8 44.Qh5 Kd7 45.Rg5 Bd6 46.Rg7+/– Kc8 47.Qf3 Qf3+= 48.Kf3 a3 49.Ke4 Re8 50.Kd5 Bb4 51.Kc4 Bd2 52.Nd5 Be3 53.Kb3 Rd8 54.Ne7 Kd7 55.Ng8 Kc6 56.Ka3 Bc5 57.Ka2 Rd2 58.Kb1 Bd4 59.Rg4 Kc5 60.Ne7 Rh2 61.h4 Bf6 62.Ng6 Kd6 63.Kc1 ½–½. Pommerel,Wim – Schirmer,Michael, corr 3GMM–F, 2001.

6.Nf3 Bd6 7.c4 dc4 8.Qc2 Ngf6 9.Ng5 Bg4 10.Bc4 0-0 11.Bd3 h6 12.h3 Bh5 13.g4 hg5=+ 14.gh5 Nh5 15.Be2 Nhf6 16.Rg1 Nh7 17.Nc3 f5 18.0-0-0 c6 19.bc6 bc6 20.h4 g4 21.f3 Rb8 22.fg4= Qe7 23.Qa4 Nc5 24.Qc4 Kh8=+ 25.gf5 Nb3 26.Kc2+= Ba3 27.Ba3 Qa3 28.Rb1 Na1 29.Kd3? Qd6 30.Ke4–/+ Nf6 31.Kf3= e4 32.Ne4 Ne4 33.Qe4 Nb3 34.Rb3 Rb3 35.Rg5 g6 36.Kg2 Rf5–/+ 37.Rf5 gf5 38.Qe8 Kg7–+ 39.Bc4?? Qd2 40.Kf3 Qd1 41.Be2 Qh1 42.Kg3 Qg1 43.Kf3 Qg4 44.Kf2 Qh4 45.Kf3 Qe4! 46.Qe4 fe4 47.Ke4 a4 48.Bc4 Rb2 0–1. Basman,Michael J – Eales,Richard G, Ch Great Britain, Torquay (England), 1998 (or: Basman,Michael (2350) – Eames,Robert, BCF–ch, 1998?).

6.Nf3 Bd6 7.c4 dc4 8.Qc2 Nh6 9.Bc4= Qe7 10.Be6 Qe6 11.Nc3 f5 12.Ng5 Qg6=+ 13.h4 0-0 14.Rh3 Nc5 15.Na4 Na4 16.Qa4 f4 17.Qc4 Kh8 18.Ke2 Nf5=+ 19.Rah1 h6 20.Kd1 b6 21.ef4= ef4 22.Qc6 Rae8=+ 23.Kc1 Re7 24.Nf3 Rfe8 25.h5=+ Qe6 26.Re1 Qf7 27.Re7 Qe7 28.Rh1 Ba3–/+ 29.Kb1 Rf8?? 30.Ne5+/– Rf6 31.Ng6 Rg6 32.hg6 (32...Bb4 33.Rh5+-; 32.Qg6?! Qe4 33.Ka1 Bb2 34.Kb2 Qe5 35.Kc1 Qb5=+) 1–0. Campos Calvo,Sotelo Juan (2015) – Salgado Gonzalez,Julio (2070), Concello de Poio op 1st, 2001.

6.Nf3 Bd6 7.Be2 Ngf6 8.0-0 =+.

6.Nf3 f6 7.d3 Bd6=+ 8.Nbd2 Ne7 9.c4 c6 10.Be2 cb5 11.cb5 a4 12.0-0= 0-0 13.Qb1 Qa5=+ 14.Bc1 Nb6 15.Qb2–/+ Bd7 16.Rb1 Rac8–/+ 17.Rd1 Rc3 18.Nc4 Nc4 19.dc4 Ba3 20.Qd2 Bb4–/+ 21.Qa2 Bf5 22.Bd2 Bb1 23.Rb1= Rb3 24.Rb3 ab3 25.Qa5 Ba5 26.Ba5 b2 27.Nd2 Ra8 28.f3? Ra5 29.Kf2 Ra1 30.Bd3 dc4 31.Bc4 Kf8 32.Bd3 Nd5 33.Nb1 b6 34.e4 Nb4 (35.Ke3 Nd3 36.Kd3 Rb1–+) 0–1. Amor Alcaide,Manuel – Vehi Bach,Victor Manuel (2365), Barbera op, 1996.

6.f4 ef4 7.ef4 Ngf6 8.Qe2 =+.

6.h3 Ngf6 7.d4 ed4 8.Bd4 =+.

6.Bb2 Bd6 7.Be2 Ngf6 8.0-0 =+.

6.Nc3 Ngf6 7.Be2 Bd6 8.Bb2 =+.

6.c4 dc4 7.Qc2 Nc5 8.Ne5 Nb3 9.Ra2=.

6.c4 dc4 7.Qc2 Bd6 8.Bc4= Bc4 9.Qc4 Ngf6 10.Nc3 Qe7 11.d3= 0-0 12.0-0 Rad8 13.Bb2 Rfe8 14.Rfd1 Nb6 15.Qb3 Nfd7 16.Ne4 a4 17.Qa2 h6 18.Rac1 Kh8 19.g3 Nf6 20.Nd6 cd6 21.e4 Qd7 22.Kg2 Kg8 23.Bc3 Qb5 24.Rb1 Qa6 25.Qb2 Nfd7 26.Qb5 Qb5–/+ 27.Rb5 Rc8 28.Ba5 Rc6 29.d4 Nc4 30.Rb7= Nf6 31.Bb4 Ne4–/+ 32.de5 de5 33.Ra7 Rf6 34.Rdd7 Nf2 35.Be7–/+ Rf5 36.Rac7? Ng4–+ 37.Nd2?? Rf2 38.Kg1 Nd2 39.Rc3 Nf3 (40.Rf3 Rf3–+) 0–1. Bulcourf,Carlos (2260) – Minzer,Claudio Javier (2350), IRT Jaque Mate, 1994.

6.c4 dc4 7.Qc2 Ngf6 8.Ng5 =+.

6.d3 Ngf6 7.Be2 Bd6 8.Nbd2 =+.

6.d4 e4 7.Nfd2 Nb6 8.c4=.

6.Be2 Bd6 7.0-0 Ngf6 8.a4 =+.

5.Bb2 Qd6 6.d4 e4 7.c4 Be6 8.cd5=.

5.Bb2 Nbd7 6.d4 (6.Nf3 Bd6 7.Be2 0-0 8.0-0=+; 6.Be2 Bd6 7.Nf3 c5 8.0-0=+; 6.c4 dc4 7.Bc4 Bd6 8.d4=+; 6.Nc3 Bd6 7.Nf3 0-0 8.Be2–/+; 6.f4 ef4 7.ef4 Bc5 8.Qe2=+) 6...Bd6 7.c4 dc4 8.Nd2=.

5.Bb2 e4 6.Be2 (6.c4 dc4 7.Bc4 Nbd7 8.Qc2=+; 6.Bd4 Be7 7.Nc3 c5 8.bc6=+; 6.Nc3 Bd6 7.Nge2 0-0 8.Nd4=+; 6.Ne2 Bd6 7.d3 0-0 8.de4=+; 6.d3 Bd6 7.c4 dc4 8.de4=) 6...Be7 7.Nc3 c5 8.d3=.

5.d4 ed4 6.ed4 (6.Qd4 Be6 7.Nf3 Bd6 8.Bb2=+) 6...Bd6 7.Nf3 0-0 8.Be2=+.

5.d4 Nbd7 6.c4 (6.Bb2 Bd6 7.c4 dc4 8.Nd2=; 6.de5 Ne5 7.Bb2 Bd6 8.Be2=+; 6.Be2 Bd6 7.de5 Be5 8.Ra2=; 6.Nf3 Bd6 7.c4 dc4 8.Bc4=+) 6...ed4 7.ed4 Be7 8.c5=.

5.d4 Qe7 6.de5 Qe5 7.Ra2 Qe6 8.c4=.

5.Be2 Nbd7 6.d4 (6.Bb2 Bd6 7.Nf3 c5 8.0-0=+; 6.d3 c6 7.Nc3 Bd6 8.Nf3=+; 6.Nc3 Bd6 7.Nf3 c5 8.d3=+; 6.Nf3 Bd6 7.0-0 c5 8.d3=+) 6...Bd6 7.de5 Be5 8.Ra2=.

5.Be2 e4 6.Bb2 (6.d3 Bd6 7.Bb2 Be6 8.Nd2=+; 6.f3 Bd6 7.Bb2 0-0 8.Kf2–/+; 6.a4 Be6 7.Ba3 Ba3 8.Ra3=+; 6.d4 Be6 7.Nd2 Bd6 8.c4=+; 6.Nc3 Bc5 7.f3 Be6 8.Bb2=+) 6...Bd6 7.d3 Be6 8.Nd2=+.

5.Be2 Be6 6.Nf3 (6.Bb2 e4 7.d3 Nbd7 8.Nd2=+; 6.Nc3 d4 7.ed4 ed4 8.Na4=+; 6.d3 Bd6 7.Nf3 0-0 8.0-0=+; 6.d4 Bd6 7.Nf3 e4 8.Nfd2=+; 6.a4 e4 7.Bb2 Bd6 8.Ba3=+) 6...Bd6 7.0-0 0-0 8.Bb2=+.

5.Be2 Bf5 6.d4 (6.Bb2 Bd6 7.Nf3 Nbd7 8.Nc3=+; 6.d3 Bd6 7.Nf3 0-0 8.Bb2=+; 6.Nf3 Bd6 7.Bb2 Nbd7 8.0-0=+; 6.c4 Bd6 7.cd5 Nd5 8.d3=+; 6.Ra2 Bd6 7.Nf3 0-0 8.Bb2=+) 6...e4 7.c4 Bd6 8.g4=+.

5.Nf3 Qd6 6.Be2 (6.Bb2 Nbd7 7.c4 e4 8.Nd4=+) 6...Nbd7 7.0-0 Be7 8.a4=.

5.Nf3 Bd6 6.Bb2 (6.Be2 Nbd7 7.Bb2 c5 8.0-0=+; 6.Nc3 0-0 7.Bb2 Re8 8.Be2=+; 6.Ra2 Nbd7 7.Bb2 c5 8.Be2=+; 6.d4 e4 7.Nfd2 Ng4 8.Be2=+; 6.d3 0-0 7.Bb2 Qe7 8.Be2=+) 6...Nbd7 7.Be2 0-0 8.0-0 =+.

5.Nf3 Nbd7 6.Be2 (6.Bb2 Bd6 7.Be2 c5 8.bc6=+; 6.Nc3 Bd6 7.Be2 0-0 8.0-0=+; 6.d3 Bd6 7.Be2 0-0 8.0-0=+; 6.d4 Bd6 7.c4 dc4 8.Bc4=+; 6.Ra2 Bd6 7.Be2 0-0 8.Bb2=+) 6...Bd6 7.0-0 c5 8.d3 =+.

5.Nf3 e4 6.Nd4 c5 7.bc6 Nc6 8.Bb2 Qb6 9.Bb5 Bg4 10.Qc1 Bc5 11.Nc6?? (11.Ba4 Rb8+=) 11...bc6 (better is 11...Qb5 12.c4 Qc6 13.Bf6 gf6 14.cd5 Qd5–+) 12.Ba4+= Qa6 13.d3 Be7 14.0-0 0-0 15.d4 (15.de4 de4 16.Nd2 Be2=) 15...Rfb8 16.Nd2 Be2 17.Re1 Bb5 18.Bb3 a4 19.Ba2 Be2 20.c4 Bd3 21.cd5 cd5 (21...Nd5?! 22.Bc4 Bc4 23.Nc4+=) 22.Bb1 Rc8 23.Bd3 (23.Qd1!?–/+) 23...Qd3–+ 24.Qd1 Rc2 25.Bc1 Bd8 26.Nf1 (26.Rb1 Ba5 27.Re2 Rac8–+) 26...Ba5 27.Qd3 ed3 28.Rd1 Ne4 29.f3 Nc3 30.Rd3 (30.Bd2 Nd1 31.Rd1 Bc3–+) 30...Ne2 31.Kh1 Nc1 (worse is 31...Rc1 32.Rc1 Nc1 33.Rd1–+) 32.Rc1 (32.Rd1 Nb3 33.Rab1–+) 32...Rc1 33.Kg1 Rb8 34.Kf2 0–1. stameni – soidog (1875), gameknot.com, 2014.

5.Nf3 e4 6.Nd4 Bd6 7.Bb2 0-0 8.Be2 =+.

5.Nf3 Bg4 6.h3 (6.Bb2 e4 7.h3 Bh5 8.g4–/+; 6.Be2 e4 7.Nd4 Be2 8.Qe2=+; 6.Nc3 e4 7.h3 Bh5 8.g4–/+; 6.d3 Bd6 7.Be2 0-0 8.Bb2=+; 6.d4 e4 7.h3 Bh5 8.g4–/+) 6...Bf3 7.Qf3 e4 8.Qf5 =+.

6.a4 0-0 7.c4 Be6 8.Qb3 Nbd7 9.d4 Bb4 10.Bc3 ed4 11.Bb4 ab4 12.ed4 Qe7 13.c5 Bg4 14.Ne2 Be2 15.Be2 Qe4 16.Qb4 Qg2 17.Rf1 Rfe8 18.Nd2 Nh5 19.Kd1 Nf4 20.Bf3 Qh2 21.a5 Nd3 22.Qb3 Nf2 23.Kc2 Qf4 (23...c6 24.a6 Qh4 25.ab7 Ra1 26.Ra1 Qd4 27.bc6 Qc5 28.Qc3 Qc3 29.Kc3 d4 30.Kd4+-) 24.Qd5 Nf6 25.Qb7? (better is 25.Qc4!? N2g4 26.Bg4 Qg4 27.c6 bc6 28.bc6–+) 25…Qd4 (25...Qd4 26.Qa8 Qd3 (worse is 26...Ra8 27.Ba8 Qd3 28.Kb2 Qd2 29.Kb3–+) 27.Kb2 Qd2 28.Kb3 Ra8 29.Ba8 Nd3 30.Rf6 gf6 31.Rg1 Kf8–+) 0–1. Schalkwijk,Peter – Kerekgyarto,Ference, RD–2009–0-00021, 2009.

6.Nc3 0-0 7.Nf3 c5 8.bc6 =+.

6.c4 0-0 7.d3 d4 8.ed4 ed4 9.Bd4 Be7 (better is 9...Bh2!? 10.Nf3 Re8 11.Be2 Bg4+=) 10.Nf3+= c6 11.Be2 cb5 12.cb5 Nbd7 13.0-0 Nc5 14.Nbd2 Re8 15.Re1 Nd5 16.Rc1 Ne6 17.Bb2 Qb6 18.Qb3 Nec7 19.a4 Bb4 20.Bf1 Re1 21.Re1 (21.Ne1? Bd2 22.Rd1 Bf4–+) 21...Qh6 22.Qc2 Be6 23.Re4 Rc8 24.Nc4 Ne8 25.Nd4 Nd6 26.Ne6 fe6 27.Rg4 Nf5 28.Qe2 Rf8 29.Be5 Rd8 30.h3 Re8 31.Qb2 g6 32.Be2 Qf8 33.h4 Nh6 34.Re4 Nf5 35.h5 Qh6 36.hg6 hg6 37.Bg4 Re7 38.Bh3 Re8 39.Qc2 Qg5 40.g3 Re7 41.Bf5 gf5 42.Rh4 Rh7 43.Nd6 Rh4 44.Qc8 Kh7 45.Qh8 Kg6 46.Qe8 (46.Qh4?! Qh4 47.gh4 Bd6 48.Bd6 Kh5=) 46...Kh7 47.Qf7 Kh6 48.Qe6 Qg6 (48...Kh5 49.Qe8 Kg4 50.gh4 Qh4 51.Qg8 Qg5 52.Qg5 Kg5 53.Nb7 Kg4+-) 49.Nf5 (49.Qd5?! Bd6 50.Bd6 Ra4 51.Bf8 Kg5 52.Qb7 Ra2+/–) 49...Kh5 50.Ng7 Kh6 51.Qd5 Qg5 52.Nf5! Qf5 53.gh4 Be7 54.Bg7! Kg6 (54...Kg7 55.Qf5 Discovered attack) 55.Qf5 (55.Qb7?! Qg4 56.Qg2 Qg2 57.Kg2 Kg7+-) 55...Kf5 56.h5 Bc5 57.h6 Kg6 58.d4 (58.d4 Bb6 59.f4+-) 1–0. de Visser,Arnold W (1995) – Thomas,Gerald K (1840), WS/O39 ICCF, 2012.

6.c4 0-0 7.d4 ed4 8.Qd4 Bg4 (8...Re8 9.cd5 Be5 10.Qd2 Bb2 11.Qb2 Nd5 12.Nf3=) 9.c5 (9.cd5 Re8=) 9...Be7 10.Nd2 Nbd7 11.Rc1 c6 12.a4 (12.Bd3 Qc8=) 12...Rc8 13.b6 Re8 14.Ne2 Bf8 15.Ng3 h5 (15...Qe7 16.Qf4=) 16.h3 (16.Bd3 h4 17.Nf5 g6 18.Nh4 Bg7+=) 16...h4= 17.Bd3 (17.Ne2 Bf5 18.Nf4 Ne4+=) 17...hg3 18.hg4 gf2 19.Ke2 (19.Kf2 Qe7 20.g5 Ne4 21.Ne4 de4+/–) 19...g6 (better is 19...Nc5!? 20.Rc5 Qb6+=) 20.g5+= (worse is 20.Kf2 Bg7 21.Qf4 Ng4 22.Qg4 Bb2–/+) 20...Bg7 21.Qh4 (21.gf6? Bf6 22.Qf4 Bb2–+) 21...Nh5 22.Bg7 Kg7 23.g4 (23.Kf2?! Ne5 24.Be2 Qe7=) 23...Qe7 24.Qf2 (worse is 24.gh5 Qe3 25.Kd1 Qd3 26.h6 Kh7 27.Qf2 Re7+=) 24...Qe3 25.Qe3 Ng3 26.Kf3 Re3 27.Ke3 Nh1 28.Rh1 Nc5 29.Bc2 Re8 30.Kd4 Ne6 31.Ke5 (31.Kc3 Nc5+=) 31...Rd8 (31...Ng5 32.Kf4 Ne6 33.Ke5 f6 34.Kd6+=) 32.Rd1 (32.Nb3 d4+=) 32...d4 33.Nb3 Rd5 34.Ke4 Rg5 35.Bd3 (better is 35.Kf3!? Rd5 36.Bd3+/–) 35...Rg4+= 36.Ke5 Rg5 37.Kd6 Rd5 38.Ke7 Ng5 (better is 38...Nc5!? 39.Nc5 Rc5+/–) 39.Bc4+= Rf5 40.Kd7 Ne4 (40...Kf6 41.Kc7 (41.Nd4?! Rc5 42.Rc1 Ne4+/–) 41...c5 42.Kb7+-) 41.Kc7 (41.Nd4 Rf4 42.Bb3 Nf2=) 41...Nc3 42.Ra1 (42.Nd4 Rc5 (42...Nd1?? 43.Nf5 gf5 44.Kb7+-; 42...Na4?? 43.Nf5 gf5 44.Kb7+-) 43.Bb3 Nd1 44.Kb7 Nc3+=) 1–0. Cirulis,Ilmars (1890) – Rodriguez Perez,Rene (1735), FICGS, 2015.

6.c4 dc4 7.Bc4 0-0 8.Nf3 Bg4 (8...e4 9.Ne5=+) 9.Be2 (9.h3 Bf3 10.Qf3 Ra7=) 9...Nbd7=+ 10.0-0 Nd5 11.Nc3 Nc3 12.Bc3 Qf6 (12...Qe7 13.d4=) 13.a4 Qh6 14.e4 f5 15.d3 fe4 16.de4 Rf6 (16...Nf6 17.Ne5 Be6 18.Qc2+=) 17.Bd2 (better 17.Qd5!? Kh8 18.Qb7+/-) 17...Qh5+= 18.Qb3 Kh8 19.Qe3 Rh6 20.h3 Bh3 21.Ng5 (21.gh3?? Qh3 22.Qh6 gh6-+) 21...Bg4 22.Nf7 Qf7 23.Bg4 Nf6 24.Bh3 (24.Qf3 Rh4 25.Bf5 Qh5 26.Qh5 Rh5=+ (worse 26...Nh5 27.g3 g6 28.gh4 gf5 29.ef5+/-)) 24...Nh5 25.Qc3 (25.Bf5!?=+) 25...Nf4 26.Bf4 Qf4 27.Qd3 Rf8 28.Rac1 g5 29.g3?? (better 29.Qe2-/+) 29...Rh3-+ 30.Qd6 (30.Qe2 Qf6 31.Kg2-+) 30...Rg3! (30...cd6?! 31.gf4 Rf4 32.Rc8 Kg7 33.Rc7 Kg6 34.f3-+) 31.fg3 Qg3 (31...cd6?? 32.gf4 (32.Rf4? gf4 33.Rc7 Rg8-+) 32...ef4 33.Rc7+-) 32.Kh1 Rf1 33.Rf1 Qh3 (33...cd6 34.Rf8 Kg7 35.Rd8-+) 34.Kg1 Qf1!! 35.Kf1 cd6 (35...cd6 36.Kg2 h5-+) 0-1. moss42 (2050) - bobby fissure (2235), ChessWorld.net, 2013.

6.c4 dc4 7.Bc4 Nbd7 8.d4 =+.

6.c4 c6 7.c5 Bc5 8.Be5 0-0 9.Nf3 Nbd7 10.d4 Ne5 11.Ne5 (worse is 11.dc5 Nf3 12.gf3 Qe7–/+) 11...Bd6 12.bc6 Be5 (better is 12...bc6!? 13.Nc6 Qc7+=) 13.cb7 Bb7 14.de5 Nd7 15.Qd4 Rc8 16.Nd2 Qg5 17.f4 Qg6 18.g3 f6 19.Bd3 (better is 19.ef6 Qf6 20.Rb1+/–) 19...fe5= 20.fe5 (20.Bg6 ed4 21.Nb3 hg6 22.Na5 Ba8 23.ed4 Rb8–+) 20...Qg5 21.e6 Ne5 22.Ke2 (better is 22.Be2!?=) 22...Nd3–/+ 23.Qd3 Qg4 24.Ke1 d4 25.Rf1 Rf1 26.Nf1 Qe6 27.Qd4 Ba6 28.Qd2?? (better is 28.Nd2=) 28...Rf8–+ 29.Qd4 Rf1 30.Kd2 Rf2 31.Ke1 (31.Kd1 Qc6 32.Qd8 Kf7 33.Qd2 Qa4 34.Kc1 Qc4 35.Kd1 Rf1 36.Qe1 Qe2 37.Kc1 Re1) 31...Re2 32.Kd1 Re3 (32...Qb3 33.Kc1 Qc2) 33.Qd8–+ Kf7 34.Qc7 Qe7 (34...Kg6 35.Kc1 Qf6 36.Qc2 Bd3 37.Ra2 Bc2 38.h4 Qc3 39.h5 Kh6 40.Rc2 Re1) 35.Qf4 Kg8 36.Kd2 (36.Qb8 Qf8 37.Qf8 Kf8 38.a4–+) 36...Re2 37.Kc3 (37.Kd1 Qd7 38.Kc1 Qc6 39.Qc4 Qc4 40.Kd1 Qc2) 37...Qc5 38.Kb3 Qc2 0–1. combijack (1820) – jacamabe (1720), gameknot.com, 2012.

6.c4 Bg4 7.Qc2 Nbd7 8.Nc3 c6 9.h3 Bh5 10.Nf3 0-0 11.Be2 e4 12.Nd4 Be2 13.Nce2 Ne5 14.0-0 c5 15.Nf5 Nc4 16.a4 Nb2 17.Qb2 b6 18.g4 h6 19.f4 ef3! 20.Rf3 Ne8 21.Raf1 Qc7 22.Nd6 Qd6 23.Nf4 Nf6 24.Qc2 Rae8 25.Kg2 ½–½. combijack (1820) – jcasals (1845), gameknot.com, 2013.

6.d3 0-0–/+ 7.Nd2 c6 8.Ngf3 Re8 9.d4 e4 10.Ne5 Be5 11.de5= Ng4 12.c4 Bf5 13.bc6= bc6 14.cd5 cd5 15.Bb5 Nd7 16.Nb3 Rb8 17.a4 Nde5=+ 18.Be5 Re5 19.Qd2 Qh4 20.g3 Qf6 21.h3 Nh6 22.Qa5 Re7 23.Rc1 g6 24.Nd4 Rbb7? 25.Qd8+/– Kg7 26.Nc6 Qb2 27.0-0 Red7 28.Qe8 Bh3=+ 29.Na5? Re7 30.Qd8 Ra7 31.Rb1 Qf6 32.Nc6 Qf3 (33.Qf8 Kf8 34.Ne7 Qg2#; 32...Bf1?! 33.Na7 Bb5 34.Nb5–/+) 0–1. Rewitz,Poul (2235) – Josephsen,Niels, DEN–chT, 1989.

6.Bd3 0-0 7.Be2 e4 8.d3 =+.

6.d4 e4 7.c4 Be6 8.cd5 =+.

6.Be2 Nbd7 7.Nf3 c5 8.0-0 =+.

6.Nf3 Bg4 =+.

7.Nd4 c5 8.bc6 Nc6 9.Bb5 Bd7 10.0-0?? Bh2!–+ 11.Kh1 Ng4 (12.Qg4 Bg4 13.Kh2 0-0–+) 0–1. Van Esbroeck,Dirk – Woelfelschneider,Peter, corr SOK, 1999.

7.Nd4 c6 A) 8.Be2 A1) 8...0-0 9.bc6 bc6 10.Nc3 Be5 11.0-0=+; A2) 8...c5 9.Nb3 a4 10.Nc1 0-0 11.0-0=+; B) 8.bc6 B1) 8...Nc6 9.Nb5 Be5 10.Be5 Ne5 11.Be2=; B2) 8...bc6 9.Be2 0-0 10.Nc3 Ra7 11.Rb1=+.

8.Ra2 A) 8...c5 9.bc6 Nc6 10.Be2 Rb8 11.0-0=+; B) 8...a4 9.c4 (9.d3 c5 10.bc6 bc6 11.Be2=+ –0.50; 9.Be2 c5 10.bc6 bc6 11.Nc3=+ –0.56) 9...c5 10.bc6 Nc6 11.Qc2=+; C) 8...Bd7 9.Nc3 (9.Be2 c5 10.bc6 bc6 11.0-0=+ –0.41; 9.d3 c5 10.bc6 Nc6 11.Nd2=+ –0.47; 9.h3 Qe7 10.Be2 c5 11.bc6=+ –0.50; 9.f4 ef3 10.Nf3 Be6 11.Bd3=+ –0.56; 9.f3 ef3 10.Nf3 Be6 11.Bd3=+ –0.56) 9...c5 10.bc6 bc6 11.d3=+; D) 8...Re8 9.Nc3 (9.Be2 c5 10.bc6 bc6 11.0-0=+ –0.34; 9.Bc3 c5 10.bc6 bc6 11.Rb2=+ –0.56; 9.h3 c5 10.bc6 bc6 11.Be2=+ –0.53; 9.d3 c5 10.bc6 bc6 11.de4=+ –0.47; 9.Ra1 c5 10.bc6 bc6 11.Be2=+ –0.62) 9...Be5 10.Be2 Bd4 11.ed4=+; E) 8...c6 9.bc6 (9.d3 c5 10.Nb3 ed3 11.cd3–/+ –0.91) 9...bc6 10.Be2 Qc7 11.Nc3=+.

8.Nc3 a4 9.f4 (9.Rb1 Be5 10.Be2 Qe7 11.0-0=+ –0.28; 9.d3 Qe7 10.de4 de4 11.Qe2=+ –0.50; 9.Rc1 Be5 10.Be2 Qd6 11.h3=+ –0.66; 9.Be2 Re8 10.0-0 Be5 11.Rb1=+ –0.34; 9.Qe2 Be5 10.Rb1 Bg4 11.f3–/+ –0.94) 9...ef3 10.Nf3 Be6 11.Be2=.

8.Nc3 c5 9.bc6 bc6 10.Be2 Be5 11.Na4=.

8.Nc3 c6 9.bc6 (9.d3 c5 10.Nde2 Bg4 11.de4=+ –0.37; 9.Nde2 Bg4 10.bc6 bc6 11.h3=+ –0.62) 9...bc6 10.d3 Bg4 11.Be2=+.

8.Nc3 Be5 9.Na4 (9.Be2 Qd6 10.h3 a4 11.Rb1=+ –0.28; 9.h3 Re8 10.Be2 c5 11.bc6=+ –0.41; 9.Nce2 Re8 10.Ng3 a4 11.Be2=+ –0.34; 9.Rb1 Bd4 10.ed4 Bf5 11.Be2= –0.19; 9.d3 Bd4 10.ed4 Bg4 11.Be2=+ –0.41) 9...Re8 10.Be2 Bd6 11.0-0=.

8.Nc3 Re8 9.f4 (9.Be2 Be5 10.0-0 Qd6 11.h3=+ –0.37; 9.Rb1 Bg4 10.Be2 Be2 11.Nce2=+ –0.34; 9.Rc1 c5 10.bc6 bc6 11.Rb1=+ –0.47; 9.a4 Be5 10.Be2 Qd6 11.Ba3=+ –0.50; 9.Na4 c5 10.bc6 bc6 11.Be2=+ –0.47) 9...a4 10.Be2 Bc5 11.Nb1=+.

8.Nc3 Bg4 9.Be2 Be2 10.Nce2 c5=.

8.c4 c5 9.bc6 Nc6 10.Nc6 bc6 11.d4 (11.cd5 Nd5 12.d3 Rb8=+) 11...Be6 (11...Rb8 12.Qc2–/+) 12.c5 Bc7 (12...Bg4 13.Qa4 Qb8 14.Ra2= (14.cd6?? Qb2 15.f3 ef3 16.gf3 Bf3–+)) 13.h3 (13.Nc3 Rb8 14.Rb1 Bg4=+) 13...Ne8 (13...Rb8 14.Qe2–/+) 14.g3 (14.Nc3 Rb8 15.Rb1 Nf6=+) 14...f5 (14...Rb8 15.Qe2–/+) 15.Nc3 g5 (15...Rb8 16.Rb1=+) 16.Be2 Ng7 17.Qa4 Qd7 18.0-0-0 f4 19.gf4= gf4 20.Bg4 h5 21.Be6= Qe6 22.Rdg1 fe3 23.fe3 Rf3 24.Nd1 Kh7 25.Qc2 h4 26.Bc3 Nf5–/+ 27.Rg4 Bg3 28.Be1 Qh6 29.Bg3 Ne3–/+ 30.Bf4 Rf4 31.Ne3 Rg4 32.hg4 Qe3 33.Qd2 Qa3 34.Qb2 Qb2 35.Kb2 Kg6 36.Rh4 Kg5 (37.Rh7 Kg4–+) 0–1. Champion,William R – Morrison,Jackson E, APM54, 1994.

8.Be2 a4 9.f4 (9.0-0 c5 10.bc6 bc6 11.f3=+ –0.41; 9.f3 c5 10.bc6 bc6 11.0-0=+ –0.34; 9.Nc3 Be5 10.0-0 Qd6 11.h3=+ –0.41; 9.Ra2 c5 10.bc6 bc6 11.0-0=+ –0.41; 9.Bc3 c5 10.bc6 bc6 11.Ra2=+ –0.69) 9...c5 10.bc6 bc6 11.0-0=+.

8.Be2 c5 9.Nb3 a4-/+ 10.Nc1 Be6 11.d3 Nbd7 12.d4 (12.de4 Ne4 13.0-0 Qc7-/+) 12...cd4 (12...c4!?-/+) 13.Bd4=+ Qc7 14.Nd2 (14.h3!?=+) 14...Rfc8 15.c3 Bh2 16.g3 (16.g4!? Be5 17.Na2-+) 16...Bg3-+ 17.fg3 Qg3 18.Kf1 Bh3 19.Rh3 Qh3 20.Kg1 Qg3 21.Kh1 (21.Kf1 Ne5-+) 21...Rc3!! 22.Bc3 (22.Nf1 Qh4 23.Nh2 Rc7-+) 22...Qh3 23.Kg1 Qe3 24.Kg2 Qc3 25.Ra2 (25.Na2 Qa3 26.Nf1 Qb2-+) 25...Rc8 26.Qa4 (26.Ncb3 ab3 27.Nb3 Qe3-+) 26...Qc1 27.Nb3 (27.Qd4-+) 27...Qg5 28.Kf1 Qf4 29.Ke1 (29.Kg1 Rc3 30.Bd1 Qe3 31.Rf2 Qe1 32.Kg2 Qd1 33.Qa8 Nf8-+) 29...Qh4 30.Kd1 Qh1 31.Kd2 e3! 32.Kd3 (32.Ke3 Decoy theme: e3 32...Qg1) 32...Ne5 33.Ke3 Qg1 (33...Qg1 34.Kd2 Ne4 35.Qe4 de4 36.Nc5 Rc5 37.Bc4 Nc4 38.Kc2 Na3 39.Kd2 Rc1 40.Ra3 Qe1) 0-1. petrobbo (2005) - Yorkie (2480), ChessWorld.net, 2018.

8.Be2 c5 9.bc6 bc6 10.Nc3 Ra7 11.Rb1=+.

8.Be2 c6 9.bc6 (9.d3 c5 10.Nb3 ed3 11.cd3=+ –0.53) 9...bc6 10.Nc3 Be5 11.Na4=.

8.Be2 Be5 9.Ra2 (9.Bc3 c5 10.bc6 bc6 11.0-0=+ –0.34; 9.h3 c5 10.bc6 bc6 11.Ra2=+ –0.47; 9.0-0 Qd6 10.h3 a4 11.Ra2= –0.25; 9.d3 c5 10.bc6 bc6 11.Nd2=+ –0.28; 9.Nc3 Qd6 10.h3 a4 11.Rb1=+ –0.44) 9...c5 10.bc6 bc6 11.Ne6=.

8.Be2 Re8 9.0-0 (9.f4 c5 10.bc6 Nc6 11.0-0=+ –0.44; 9.f3 c5 10.bc6 bc6 11.Nc3=+ –0.31; 9.Nc3 Be5 10.0-0 Qd6 11.h3=+ –0.37; 9.Ra2 c5 10.bc6 bc6 11.0-0=+ –0.34; 9.Bc3 c5 10.bc6 bc6 11.0-0=+ –0.44) 9...c5 10.bc6 bc6 11.Nc3=.

8.f4 A) 8...ef3 9.Nf3 Be6 10.Be2 Nbd7 11.0-0=; B) 8...c6 9.a4 c5 10.Nb3 Be7 11.Be2=+; C) 8...Nbd7 9.Be2 Nb6 10.Nc3 Nc4 11.Bc4=+; D) 8...Bg4 9.Be2 Be2 10.Qe2 Nbd7 11.Nf5=; E) 8...c5 9.bc6 Nc6 10.Be2 Bc5 11.Ra2=+.

6.a4 ed4 7.Qd4 c5 8.bc6 –/+.

6.Bb2 ed4 7.Qd4 0-0 A) 8.c4 Re8 9.cd5 Be5 10.Qd2=+; B) 8.Bd3 c5 9.Qh4 Ne4 10.Qh5=+; C) 8.Be2 Bf5 9.Nc3 c6 10.Qd2=+; D) 8.Nd2 Re8 9.Ngf3 Bg4 10.Be2=+.

6.Bb2 ed4 7.Qd4 0-0 8.Nf3 c5 9.bc6 Nc6 10.Qd3 Re8 11.Nbd2 Ne5 12.Be5= Be5 13.Ne5 Re5 14.Rb1 Bf5 15.Qd4 Re7 16.Bd3 Bd3 17.cd3 Qd6 18.a4 Rc8 19.0-0 Rc2 20.Nc4 Qc7 21.Nb6 Rc5 22.Rb5 Rb5 23.ab5 Re8 24.Nd5 Nd5 25.Qd5 a4 26.h3 a3 27.d4 Rd8 28.Qb3 Ra8 29.Ra1 b6 30.e4 Ra5 31.e5 h6 32.g3 Qc8 33.Ra2 Qc7 34.h4 g6 35.Qe3 Qe7 36.Kh2 Kg7 37.Qc3 h5 38.Kg1 Kg8 39.Qe3 Kg7 40.Kh2 Qb4 41.d5 Rb5 42.Ra3+/– Rd5 43.Ra7 Ra5 44.Rb7 Qc5? 45.Qf4+- Qf8 46.e6 Rf5 47.Qd4 Kh7 48.e7 Qa8 49.Rd7 (49...Qe8 50.Rd8 Rf2 51.Kg1+-; 49.Qb6?! Qe8+-) 1–0. Wallner,Josef (2330) – van Daatselaar,Jan Bart (2230), corr ICCF WSTT/3/06/4, 2006.

6.Bb2 ed4 7.Qd4 A) 7...Bf5 8.Bd3 Bd3 9.cd3 c6 10.bc6=; B) 7...Be6 8.Nd2 c5 9.bc6 bc6 10.Ngf3=; C) 7...Bg4 8.Nc3 Be6 9.Nf3 Qe7 10.Bd3=.

6.Bb2 ed4 7.Bd4 A) 7...c5 8.bc6 bc6 9.c4 0-0 10.Nc3=; B) 7...0-0 8.Nf3 c5 9.Bb2 Be6 10.Be2=+.

6.Bb2 e4 7.c4=+ A) 7...Be6 8.c5 Be7 9.Ne2 0-0 10.Nbc3=; B) 7...0-0 8.c5 Be7 9.Nc3 b6 10.Rc1=.

6.c4 ed4 7.ed4 dc4 8.Bc4 =+.

6.Be2 Be6 7.Bb2 e4 8.c4 =+ .

6.de5 Be5 7.Ra2 Ne4 8.Nf3 =+.

6.Nf3 e4 7.Nfd2 Ng4 8.Be2 =+.

6.a4 Nbd7 7.c4 dc4 8.Ba3=+.

6.Bb2 Bg4 7.Qd2 c6 8.bc6=+.

6.Nc3 a4 7.Nge2 Bd6 8.Nf4 c6 9.Be2 0-0 10.h3 Nbd7 11.0-0 Qc7 (11...g5 12.Nh5–/+) 12.Bb2 (12.h4 Nb6=+) 12...Nb6–/+ 13.Re1 (13.Qc1!?–/+) 13...g5–+ 14.Nh5 Nh5 15.Bh5 Nc4 16.Qc1 (16.Qb1 f5 17.Qa2 g4 18.hg4 fg4 19.Ne4 Bh2 20.Kh1 cb5–+) 16...f5–+ 17.Be2 Nb2 18.Qb2 f4 19.ef4 gf4 20.bc6 bc6 21.Qa2? (better 21.Bg4–+) 21...f3 22.Bf1 fg2 23.Bg2 Kh8 24.Nd1 (24.Re3–+) 24...Rg8 25.Ne3 (25.Kf1 Ba6 26.c4 Bc4 27.Qc4 dc4 28.Re4 Qa5–+) 25...Bh3 26.Kf1 Rg2! 27.Ke2 (27.Ng2 Qg7 Double attack (27...Qg7 Decoy)) 27...Rf2! 28.Kf2 (28.Kd1 Qb6 29.Nf5 Bf5 30.Re4 Be4 31.c3 Ra2 32.Ra2 Qb1 33.Kd2 Bg3 34.Ra1 Qa1 35.Ke3 Qe1) 28...Bb4! 29.c3 (29.ab4 Qh2 Mate attack) 29...Qh2 30.Ng2 Qg2 31.Ke3 Qf3 32.Kd2 Qc3 33.Kd1 Bg4 34.Re2 Rf8 (34...Rf8 35.ab4 Rf1) 0–1. Silent Move (2115) – chessfan777 (2175), redhotpawn.com, 2012.

6.c4 Bd6 7.Nc3 dc4 8.Bc4=+.

6.Bd2 Bg4 7.f3 ef3 8.Nf3=+.

6.Nd2 Bg4 7.Ne2 Qd7 8.h3=.

6.Be2 Bd6 7.Nd2 0-0 8.c4=+.

6.Bb2 e4 7.d3 0-0 8.Nd2=+.

6.Nc3 0-0 7.Nf3 c5 8.d3=+.

6.c4 Be6 7.Qc2 dc4 8.Bc4=+.

6.d3 0-0 7.Bb2 Re8 8.Nf3=+.

6.d4 Be6 7.Bb2 e4 8.c4=+.

6.Nf3 0-0 7.Bb2 Re8 8.0-0 Ng4 9.Nc3? (9.h3 Nf6=+) 9...c6 (better 9...e4 10.g3 ef3 11.Bf3 Nf6 12.Nd5 Nd5 13.Bd5 Be5 14.Be5 Qd5-+ (14...Re5?! 15.Bc4-/+)) 10.a4?? (better 10.h3 Nf6 11.Rb1=+) 10...e4-+ 11.Nd4 (11.g3 ef3 12.Bf3-+) 11...Bh2 (11...Nh2?! 12.bc6 Nf1 13.cb7-+) 12.Kh1 Qh4 13.Bg4 Bg4 14.Qg4 Qg4 15.Kh2 Re5 16.Rh1 (16.f3 Qg6 17.fe4 de4-+) 16...Rh5 17.Kg1 Rg5 18.g3 c5 19.Nde2 Nd7 20.Kf1 (20.Nf4 Nf6-+) 20...Rd8 21.Rh4 Qf5 22.Nf4 Nb6 23.d3 c4 24.d4 (24.Rd1 ed3 25.cd3 cd3 26.Rd3 Re8-+) 24...Qc8 25.Ba3 Rf5 (better 25...Qd7!? 26.Kg2-+) 26.g4 Rg5 27.Be7 Rd7?? (better 27...h6 28.Bd8 Qd8-+) 28.Bg5=+ f6 29.Bf6 gf6 30.Ke2 Qf8 31.Rh5 Can d5 get defended? 31...Qb4 (31...Qe7 32.Rg1= (worse 32.Nfd5 Nd5 33.Rd5 Rd5 34.Nd5 Qe6-/+; worse 32.Ncd5 Nd5 33.Rd5 Rd5 34.Nd5 Qe6-/+)) 32.Nfd5 Nd5 33.Nd5 Qb2 (33...Rd5 34.Rd5 Qb2 35.Re1=) 34.Rd1 (34.Nf6 Kg7 35.Nd7 Qa1 36.Rg5 Kf7+/-) 34...Rd6 (34...Rd5 35.Rd5 Qc2 36.Ke1 Qa4 37.Rd8 Kg7 38.Rd7 Kg6 39.Rb7 Qb4 40.Kf1 Qb2-/+) 35.Ne7 (35.Kd2 Rd5 36.Rd5 c3 37.Ke1 Qc2 38.Rd8 Kf7 39.Rc8=+) 35...Kf8=+ 36.Rh7 Qc2 37.Rd2 (37.Ke1!? Qa4 38.Ng6 Ke8 39.Rb7-/+) 37...Qa4-/+ 38.Nf5 (better 38.Ng6 Ke8 39.Rb7-+) 38...c3?? (better 38...Rb6 39.Rh8 Kf7 40.Rh7 Kg8 41.Rg7 Kf8-+) 39.Rd1?? (better 39.Rh8 Kf7 40.Nd6 Kg7 41.Rd8 (worse 41.Ne4 Qb5 42.Rd3 Kh8 43.Nc3 Qb2 44.Kd1 a4-/+) 41...cd2 42.Kd2=+) 39...Qb5-+ 40.Ke1 Qb4?? (better 40...Rc6 41.d5 c2-+) 41.Kf1?? (41.Rh8 Kf7 42.Nd6 Qd6 43.Rh7 Kg6 44.Rb7-+) 41...c2-+ 42.Rc1 Qb1 43.Rb1 0-1. WilyWeasel (2055) - bobby fissure (2255), ChessWorld.net, 2016.

6.Nf3 Nbd7 7.0-0 c5 8.d3=+.

4.Bb2 b6 5.e3 Bb7 6.Nf3 (6.d4 Nd7 7.Nf3 e4 8.Nfd2 Ngf6 9.Be2 Be7 10.c4 d5 11.Nc3+=; 6.Nc3 Be7 7.Nf3 Nf6 8.Be2 0-0 9.0-0 Re8 10.d4 e4 11.Ne1=) 6...Nf6 (6...c5 7.bc6 Nc6 8.Bb5 Rc8 9.0-0 Nf6 10.d4 e4 11.d5+=) 7.Bc4 h6 (7...e4 8.Nd4 d5 9.Be2 Bd6 10.0-0 Qd7 11.f3+=) 8.0-0 Be7 (8...Nbd7 9.d4 e4 10.Nh4 d5 11.Be2=) 9.d3 0-0 10.e4 Nbd7 (10...c6 11.Nc3+=) 11.Nc3 Nc5 12.Nd2 Ne6 13.Ne2 Nh5 14.d4 ed4 15.Be6 fe6 16.Nd4 Nf4 17.Qg4 e5 18.Nf5? (better is 18.Ne6!? Ne6 19.Qe6 Kh7 20.Rad1=) 18...Rf5–/+ 19.Qf5?? (better is 19.ef5 Qd7 20.Rfb1–/+) 19...Bc8–+ 20.Qf4 ef4 21.Rfd1 Bf6 22.c3 Bg4 23.f3 Be6 24.a4 Qe8 25.Nb1 Qg6 26.Bc1 Be5 27.Bd2 (27.Bb2–+) 27…Bh3 (27...Bh3 28.g3 fg3–+) 0–1. Vorobyova,Alyona – Tresvyatskiy,Kirill, Novokuznetsk RUS, City Ch, 2011.

4.c4 Nd7 5.Nc3 Ngf6 6.g3 (6.e4 Be7=) 6...Be7 (6...Nb6 7.d3=+) 7.Bg2= 0-0 8.d3 Re8 9.e3 (9.Nf3 c6=) 9...Bf8 (9...Nc5 10.Nf3=+) 10.Nge2= Nc5 (10...Nb6 11.0-0=) 11.Na4 (11.0-0 Qe7=) 11...Na4 (11...d5 12.cd5 Nd5 13.Nc5 Bc5 14.0-0=) 12.Qa4= d5 13.cd5 Nd5 14.0-0 Nb6 (14...Qd6 15.Bb2=) 15.Qc2 a4 (15...Qd7 16.Rb1=) 16.Bb2 (16.d4 Qd7=) 16...Bd6 (16...Bf5 17.Rad1 Ra5 18.f4=) 17.d4+= ed4 18.Bd4 (18.Nd4 Qg5+=) 18...Qe7 19.Nf4 g5 (19...Ra5 20.Rfb1 Ra8 21.Qc3+=) 20.Nh5+/– Nd7 (20...Be5!? 21.Qc3 g4+/–) 21.Ng7 Rd8 22.Nf5 Qe6 23.f4 g4 24.Nd6+- cd6 25.Rfd1 Nf8 26.Bb6 Re8 27.Qc7 Qf6 28.Rac1 Qb2+/– 29.Qd6 Re6? 30.Qd8+- Qb5 31.Rc5 Qe8 32.Rg5 Kh8 33.Bd4 (33...f6 34.Qf6 Rf6 35.Bf6) 1–0. Basman,Michael J – Hall,A, Surrey, 1980.

4.c4 Be6 5.d3 Nd7 (5...Ne7 6.Nf3=) 6.Nc3 (6.Nf3 Be7=) 6...c5 (6...Ngf6 7.Nf3=) 7.g3 b6 (7...Nb6!?=) 8.Bg2+= Rb8 9.Bc6 (9.Nf3 h6+=) 9...Ne7 10.Ne4 (10.Bf3 h6=) 10...Nc6= 11.bc6 Nf6 12.Nf6 gf6 13.Qa4 (13.e4 Qc7=+) 13...Qc7 14.e4 (14.f4 Rc8=+) 14...Rc8 15.Rb1 (15.Nf3 f5=+) 15...Qc6 16.Qc6 Rc6 17.Nf3 h6 (17...f5!? 18.Ng5 Bd7=+) 18.Nh4= Kd7 19.h3 Kc7 20.f4 Kb7 21.f5 Bd7 22.Ke2 Ka6 23.Bd2 Rc8 24.Nf3 h5 25.Rb2 Be7 26.Rhb1 Rb8 27.Rb3 Bd8 28.R3b2 Bc7 29.Rb3 b5 30.cb5 Rb5 31.Rb5 Bb5 32.Ke3 Bb6–+ 33.Rb2? c4 34.d4 Rc8 35.Bc3 Rg8 36.Rg2 Ba4 37.Ke2? Bb3 38.Ke3 Kb5 39.Rg1 Ka4 40.Bb2 Rc8 41.Rc1 Rg8?? 42.Kf2?? Ba2 43.Rc2 Kb3 44.Re2 Rc8 45.Nd2 Ka4 46.Nf3 c3 47.Bc3 Rc3 48.Ra2 Kb3 49.Ra1 Kb2 50.Rd1 Ra3 51.Ke2 Ra2 52.Rd2 Kb3 53.Ra2 Ka2 54.de5 de5 55.Nd2 a4 56.Nc4 Bc7 57.Kd3 Kb3 58.Nd2 Kb4 59.Kc2 Bb6 60.Nf3 Bf2 61.g4 hg4 62.hg4 a3 63.Kb1 Bd4 64.Ka2 Be3 65.Ne1 Kc4 66.Ka3 Kd4 67.Nc2 Ke4 68.Kb4 Bg5 69.Kc4 Kf4 70.Kd3 Bh4 71.Ke2 Kg4 72.Ne3 Kf4 73.Ng2 Kg5 74.Kf3 Kh5 75.Ne3 Bg5 76.Nc4 Kh6 77.Nd6 Kg7 78.Kg4 Kf8 79.Ne4 Ke7 80.Ng5?? fg5 81.Kg5 f6 82.Kg4 Kd6 83.Kf3 Kd5 84.Ke3 e4 85.Ke2 Ke5 86.Kf2 Kf5 87.Ke3 Ke5 (88.Ke2 f5–+) 0–1. marus – phophos, internet, 2001.

4.c4 Nf6 5.Nc3 =+.

4.c4 Nf6 5.Nf3 =+.

4.e3 Nf6 5.Bb2 Be7 6.c4 0-0 7.Ne2 c6 8.Ng3 Bg4 9.d4?? (9.Be2 Be2 10.Qe2 cb5 11.cb5 Re8=) 9...Nbd7 (better 9...Bd1!? 10.Kd1 ed4 11.Bd4-+) 10.Nd2?? (10.Be2 Be2 11.Qe2 cb5 12.cb5 Rc8=) 10...Rc8 (10...Bd1 11.Rd1 ed4 12.Bd4 cb5 13.cb5-+) 11.a4?? (better 11.f3 Be6 12.bc6 bc6 13.Bd3=) 11...Nc5 (better 11...Bd1 12.Rd1 cb5 13.cb5-+) 12.Nb3?? (better 12.f3 ed4 13.ed4+-) 12...ed4 (12...Bd1 13.Nc5 dc5 14.Rd1 cd4 15.Be2 Bb4 16.Kf1-+) 13.Qd3?? (better 13.f3 Be6 14.Nd4 cb5 15.ab5=+) 13...Nce4 (better 13...Nd3 14.Bd3 de3-+) 14.Nd2?? (better 14.Ne4 de3 15.fe3+- (worse 15.Qe3 d5-/+)) 14...Ng3 (better 14...Nd2 15.Qd2 de3 16.fe3 d5 17.Bf6 Bf6-+ (17...gf6?! 18.Qd3-+)) 15.bc6?? (15.hg3 de3 16.Qe3 Re8-+) 15...Rc6 (15...Nh1 16.Qd4 Rc6 17.Be2-+) 16.Be2?? (better 16.hg3 de3 17.Bf6 ed2 18.Kd2-/+) 16...Bh3 (better 16...Nh1 17.Qd4 Be6-+) 17.Qf5?? (better 17.hg3 Be6 18.Bd4=) 17...Nf5-+ 18.f3 Ng3! 19.Nb3 (19.hg3 de3 Passed pawn) 19...Qc8 (19...Nh1 20.Nd4 Bg2 21.Rc1-+) 20.Ba3 Nfh5 (better 20...Nh1!? 21.gh3 de3 22.Na5-+) 21.Na5 Qg4! 22.Bc1 (22.fg4 Nh1 Combination) 22...Rc4 (22...Qg5!? 23.hg3 Qa5 24.Bd2-+) 23.Bd2 (23.fg4 Rc1! (worse 23...Nh1 24.Nc4 Bg2 25.gh5-+) 24.Rc1 Ne2 25.Ke2 Bg4 26.Kd3 de3 27.Ke3 Bg5 28.Kf2 Nf6-+) 23...b5 (better 23...Qg5 24.e4 Nf4 25.Bf4 Qf4 26.Nc4 Ne2-+) 24.Nc6 (24.fg4 Nh1 25.Bc4 Bh4 26.Kf1 bc4 27.gh3-+) 24…Rc5 1-0. azer3136 (2270) - Ak202 (2300), Rated Blitz game, lichess.org, 2016.

4.e4 c6 5.h3 (5.Nf3 Nf6=) 5...cb5 (better is 5...Nf6!? 6.Nc3 d5=+) 6.Bb5+= Nc6 7.Nc3 Qb6? (7...Nf6!?+=) 8.Rb1 (8.d4 Qd4 9.Qd4 ed4+-) 8...Bd7 9.Nd5 Qd8 10.Nf3 Nd4?? (better is 10...Nf6 11.d3 Nd5 12.ed5 Na7 13.Bd7 Qd7+/–) 11.Bd7+- Qd7 12.Nb6 Qd8 13.Nd4 ed4 14.0-0 Ra6 15.Nd5 b5 16.Rb5 Nf6 17.c4 Ne4 18.Qa4 Nc5 19.Rc5 Qd7 20.Rc8 1–0. lustylady – aatz, Live Game Caissa's Web, 2006.

4.e4 Nf6 5.Nc3 Nbd7=.

4.e4 Nf6 5.Nc3 Be7=.

4.Bb2 d6 5.e3 Nf6 6.c4 0-0 7.Nf3 e4 8.Nd4 c5 9.bc6 bc6 10.Be2 c5 11.Nb5 Nc6 12.N1c3 Bf5 13.0-0 Ne5 14.f4 ef3 15.Bf3 (15.gf3!? Bd3 16.Bd3 Nd3 17.Qc2 Nb2 18.Qb2+=) 15...Nf3–/+ (15...Nc4?! 16.Ba8 Bd3 17.Rf3 Qa8 18.Ra2=) 16.Qf3 Bd3 17.Rfe1 Bc4 18.d4 (18.e4 Nd7 19.Qh5 Rb8–+) 18...Qd7 19.a4 d5 20.Rac1 Rfb8 (20...Bb5 21.ab5 c4 22.e4–+) 21.Kh1 (21.Ba3 Rc8–/+) 21...Rb7 (21...cd4 22.ed4 Bb4 23.Na3–+) 22.Red1 (22.dc5 Bc5 (22...Bb5?! 23.Nb5 Ra6 24.Qg3=) 23.e4 Ng4–/+) 22...cd4 23.Rd4 Bc5 24.Rf4 Qe7 (better is 24...Re8 25.Re1 Rb6–+) 25.Nd5? (better is 25.Nd1 Ne8 26.Bd4 Bd4 27.Rd4–/+) 25...Bd5–+ (25...Nd5?? 26.Rfc4 Rd8 27.Rc5+-) 26.Qg3 (26.Bf6 Bf3 27.Be7 Be3 28.Rf3 Bc1 29.Bc5–+) 26...Nh5 27.Qg4 Qe3 28.Re1 Qd2 29.Rf5 Qc2 30.Rd5+= Qb2?? 31.Qh5?? Qf2 32.Qd1 Re7?? 33.Nc7 Rf8 34.Rf1 Qh4?? 35.Rh5?? Qd4?? 36.Qc2+= Qe4? 37.Qe4 Re4+/– 38.Nd5?? Bd4 39.Rhf5 f6 40.R1f4 Rc8 41.g3 Re1 42.Kg2 Rc2 43.Kh3 Bg1 44.Nf6 gf6 45.Rf6 Rh2 46.Kg4 Bc5 47.R6f5 Rc2 48.Rg5 Kh8 49.Rd5 Re3 50.Rd8 Kg7 51.Rd7 Kg6 52.Rd8 h5 53.Kh3 Ree2 (53...Ree2 54.Rg8 Kh7–+) 0–1. Fournier,Frederic – Mephisto Mondial, Match Thematique, 2000.

4.Bb2 d6 5.e3 Nf6 6.Nf3 0-0 7.c4 e4 8.Nd4 c5 9.Nc2 d5 10.d3 (10.d4 Bg4 11.f3 ef3 12.gf3 Ne4+=) 10...dc4–/+ 11.dc4 Qd1 12.Kd1 Be6 13.Nd2 Rc8 14.f3 Rd8 15.Ke2 Bf5 16.f4 b6 17.h3 (17.Ke1 Ra7+=) 17...Nh5–/+ 18.Rd1?? (better is 18.Rg1 Ng3 19.Ke1–/+) 18…Ng3–+ (18...Ng3 19.Ke1 Nh1–+) 0–1. Fournier,Frederic (1855) – Mephisto Mondial (1970), Match, 2005.

4.Bb2 d6 5.e3 Nf6 6.Nf3 0-0 7.d3 Be6 8.Be2 c6 9.c4 cb5 10.cb5 Nbd7 11.Nbd2 Rc8 12.0-0 Nd5 13.Rc1 Rc1 14.Qc1 (worse is 14.Bc1 Nc3 15.Qe1 Qb6–/+) 14...Qb8 15.Nc4 Qc7 16.Qd2 Ra8 17.Rc1 Qd8 18.Qc2 Rc8 19.Qa4 b6 20.Qc2 N7f6 ½–½. Fournier,Frederic (1855) – Mephisto Mondial (1970), Match, 2005.

4.Bb2 Bc5 5.e3 d6 6.d4 ed4 7.ed4 Bb6=.

4.Bb2 Bc5 5.e3 d6 6.d4 ed4 7.ed4 Qe7 8.Be2 Bb6 9.Nf3 Bg4 10.0-0 0-0 11.h3 Bh5 12.Nbd2 Nbd7 13.Nc4 (13.Re1 Rae8+=) 13...Rfe8= 14.Re1 d5 15.Nce5 Ne4 16.g4 (16.c4 dc4 17.Nc4 Rad8=) 16...Bg6 (16...Ne5 17.Ne5 Qh4 18.Nd3-/+) 17.Bd3 (better 17.Ng6 fg6 18.c4=) 17...Ne5-+ 18.Ne5 (better 18.Be4 Be4 19.de5-/+) 18...Qf6?? (better 18...Qh4 19.Be4 Be4 (19...de4?! 20.Ng6 hg6 21.Re3=) 20.Re4 de4-+) 19.Qf3=+ Qf3 (19...Ng5 20.Qf6 gf6 21.Ng6 Nf3 22.Kf1 Ne1 23.Ne7 Re7 24.Re1 Re1 25.Ke1=+) 20.Nf3= Nd6 21.Bg6 hg6 22.Nd2 (better 22.a4!?=) 22...Nb5-/+ 23.c3 a4 24.f4 (24.Kf1 c6-/+) 24...Nd6 (24...Ba5!? 25.Nf3 Bc3 26.Bc3 Nc3-+) 25.Re5 c6 26.Rae1 Re5 (26...Bc7 27.Kf2-/+) 27.fe5=+ Nc4 (27...Nb5 28.Re2-/+) 28.Nc4 dc4 29.e6 f6 (29...fe6 30.Re6 Kf7 31.Re4=+) 30.Bc1 Re8 31.Bf4 Bd8 32.Bd6 Be7 33.Bb4 (33.Be7 Re7 34.Kg2 g5=+) 33...Bb4-/+ 34.ab4? (34.cb4 Kf8 35.b5 cb5 36.d5-+) 34...Kf8 (34...b5 35.Kf2-+) 35.Kf2 (better 35.b5-+) 35...b5 36.Kf3 (36.Re2 Ke7-+) 36...Ke7 37.Kf4 Kd6 38.g5 Re6 39.Ra1 Re2 40.h4 (40.gf6 gf6 41.h4 Kd5-+) 40...Rh2 (40...f5 41.Kf3 Rd2 42.Ra3-+) 41.Kg4 (41.Kg3 Rd2 42.gf6 gf6-+) 41...Rc2 42.Ra3 Rb2 (42...Kd5 43.Kf4-+) 43.Ra1 Rb3 (43...f5 44.Kf3-+) 44.Rc1 a3 45.Ra1 (45.Rc2-+) 45...Rc3 46.Kf4 Rh3 47.Kg4 Rd3 48.Kf4 Rd4 49.Kg3 (49.Ke3 Rh4 50.Rf1 f5 51.Rd1 Ke5-+) 49...Rd3 (49...c5 50.gf6 gf6 51.Rf1-+) 50.Kg4 (50.Kf2 c5 51.bc5 Kc5 52.gf6 gf6-+) 50...c3 (50...c5!? 51.bc5 Kc5 52.gf6 gf6 53.Rh1-+) 51.Ra3 Kd5 (better 51...Rd4 52.Kf3 c2 53.Rc3-+) 52.gf6 gf6 53.h5 gh5 54.Kh5 Kc4 55.Kg6 (55.Ra6-+) 55...c2 56.Ra6 c1Q (better 56...Kd5 57.Ra1 Rd1-+) 57.Rc6 Kd5 (better 57...Kb4 58.Rc1 Ka3-+) 58.Rc1 Rf3 (better 58...Ke4!?-+) 59.Rc5=+ Kd4 (59...Ke4 60.Rb5 f5 61.Kf6=) 60.Rb5= Rb3 61.Kf6 Kc4 Attacking the isolated pawn on b4 62.Rb8 Rb4 63.Rc8 Kb3 64.Rc1 Rb6 65.Ke5 Rb5 66.Kd4 Rb4 67.Kd5 Rb5 68.Kd4 Rb4 69.Kd3 Rb5 70.Rc4 Rb4 71.Rc3 Ka4 72.Rc8 Rb3 73.Kc2 Rb4 74.Ra8 Kb5 75.Rb8 Kc4 76.Rc8 Kd4 77.Rd8 Kc5 78.Rc8 Kd6 79.Kc3 Rb6 80.Rg8 Rc6 81.Kd4 Kc7 82.Rg7 Kb6 83.Rg1 Ka7 84.Kd5 Ra6 85.Rb1 Ka8 86.Kc5 Ra7 87.Rb6 Rc7 88.Kb5 Ra7 89.Kc6 1-0. sachinder (2010) - raul50 (1970), Rated Blitz game, lichess.org, 2014.

4.Bb2 Bc5 5.e3 d6 6.Nf3 0-0 (6...e4 7.Nd4=) 7.g3 (7.d4 ed4 8.ed4 Bb6=) 7...c6 (7...e4 8.Nd4–/+) 8.Nc3 (8.d4 ed4 9.Nd4 Re8=+) 8...Nbd7 (8...e4 9.Ng5 d5 10.f3=+) 9.Bg2 (9.d4 ed4 10.Nd4 Ne5=+) 9...e4 10.Ng1 (10.Nd4 Bd4 11.ed4 Re8=+) 10...d5 11.Nge2 Bd6 (11...Nb6 12.d3=+) 12.Nd4 Ne5–/+ 13.f4 ef3 14.Nf3=+ Bg4 15.0-0 c5 16.Ne2 Qe7 17.Nh4 Ne4 18.Nf5 Qe6 19.Nd6= Qd6 20.d3 Ng5 21.d4 Nc4–/+ 22.Bc1 Rfe8 23.Qd3=+ Be2 24.Qe2 Ne4 25.Rf4 f5 26.Rb1? Nc3=+ 27.Qh5?? g6 28.Qh6?? Nb1–+ 29.dc5 Qc5 30.Rd4 Nc3 31.Rd3 Ne4 (32.Rd1 Qb5–+; 31...Ne2 32.Kh1 Rad8 33.Rd1–+) 0–1. Al Obaide,N – Omearat,Adel (2260), Teheran zt, 1997.

4.Bb2 Bc5 5.e3 d6 6.h3 0-0 7.c4 Nbd7 8.Be2 d5 9.d4 ed4 10.ed4 Be7 11.c5 Re8 12.Nf3 Ne4 13.0-0 b6 14.c6 Nf8 15.Ne5 Ng6 16.Ng6 hg6 17.Nd2 Bd6 18.Nf3 a4 19.Re1 Qf6 20.Bd3 g5 21.Be4 Re4 22.Re4 de4 23.Ne5 Be6 24.Qe2 Qf4 25.Re1 Rd8 26.Qe4 Qe4 27.Re4 Rb8 28.Nf3 Bd5 29.Re1 Bf3 30.gf3 f6 31.Rb1 Kf7 32.Bc3 Ke6 33.Bb4 Bf4 34.Re1 Kd5 35.Re7 Kd4 36.Rg7 Kc4 37.Be7 Be5 38.Rf7 Kb5 39.Bf6 Bf6 40.Rf6 Rd8 41.Kf1 (41.f4 gf4 42.Rf5 Kc6 43.Rf4–/+) 41...Rd3–/+ 42.Ke2 Ra3 43.Rg6 Rc3 44.Rg5 Kb4 45.Rg1 Kb3 46.h4 a3 47.f4 a2 48.f5 Rc6 49.Ke3 Kb2 (49...Kb2 50.Re1 b5–+) 0–1. Schalkwijk,Peter – Kiryushin,Anatoly (1655), SD–2011–0-00087, 2011.

4.Bb2 c6 5.Be5+= d5 6.e3 Bf5 7.Nc3 Bd6 8.Bd6 Qd6 9.bc6 Nc6 10.Nb5 Qe7 11.Ne2 0-0 12.Ned4 Bg4 13.f3 Nd4 14.Nd4 (14.fg4?! Nb5 15.Bb5 d4=) 14...Bh5 15.Bd3 Bg6 16.0-0 (16.Bg6 fg6 17.Rb1 Rf7+/-) 16...Rfe8 (16...Bd3 17.cd3 a4 18.Qe1+=) 17.a4 (17.Bg6 fg6 18.Qe2 Qc5+-) 17...Rac8 (17...Bd3 18.cd3 Rac8 19.Rb1+/-) 18.Bg6 hg6 19.Rb1 Qc7 20.Rb5 Qc4 (20...Rb8 21.Qe2+-) 21.Qa1 Rc5 (21...Qc7 22.Rfb1+-) 22.Rb7 Rc7 23.Rb5 Rc5 24.Rfb1 Rb5 25.ab5 (25.Nb5?! Qc2 26.Rb2 Qd3+-) 25...a4 26.Qa3 Nd7 (26...Ra8 27.b6 Rb8 28.Qd6+-) 27.Rb4 Qc5 (27...Qc8 28.Ra4 Nb6 29.Ra7+-) 28.Ra4 Rb8 29.Kf2 Qc7 (29...Qa3 30.Ra3 Ne5 31.d3+-) 30.Nc6 Re8 (30...d4 31.Nb8 de3 32.Ke3 Nb8 33.Ra8+-) 31.Ne7 (31.Ne7 Kf8 32.Ng6 Kg8 33.Ne7 Kf8 34.Nd5 Qc5 35.Rh4+-) 1-0. Adlai – Furnaz, internet, 2021.

4.Bb2 d5 5.Be5+= Be6 (5...Nbd7 6.Bd4=) 6.Nf3 Nbd7 7.Bg3 Ne4 8.e3 Ng3 9.hg3 g6 (9...Bd6 10.Nd4+=) 10.d4 (10.Nd4 Bg7+=) 10...Bg7 (10...Nb6 11.Bd3+=) 11.Nbd2+/– 0-0 (11...Nb6 12.Nb3+/–) 12.c4 c6 (12...c5 13.bc6 bc6 14.cd5 Bd5 15.Bc4+/–) 13.c5 Bf5 14.Nh4 Be6 15.Rb1 (15.Bd3 Re8 16.Nhf3 Bg4+/–) 15...Nf6 (15...Re8 16.Qa4+/–) 16.Nhf3 (16.Qa4 Ne4 17.Ne4 de4 18.bc6 bc6 19.Qc6 Rc8 20.Qe4 Rc5+-) 16...b6+/– 17.bc6 bc5 18.dc5 Qe7 19.Qc2 Bf5 20.Bd3 Ne4 (20...Bd3!? 21.Qd3 Qc5+/–) 21.Nh4+- Bc8 22.Ne4 de4 23.Be4 Ba6 24.f3 Rfe8 25.Kf2 Kf8 26.Rhd1 f5+/– 27.Rd7 Qe6 28.Rbb7 Bb7 29.cb7 Rab8 30.c6 fe4 31.fe4 (31…Kg8 32.Nf3–/+; better is 31.Qc5!? Kg8 32.Qd5 Qd5 33.Rd5+/–) 1–0. Taulien,Hans_Juergen (2225) – Tiedemann,Joern (1810), remoteschach.de, 2005.

4.Bb2 d5 5.Nf3 e4=+ 6.Ng5 (6.Nd4 Bd6=+) 6...Ng4 (better 6...Bd7-/+) 7.e3?? (better 7.Nh3=+) 7...Qg5-+ 8.h4 Qf5 9.Qg4 (9.f4-+) 9...Qg4 10.Nc3 Be6 11.Rc1 (11.h5-+) 11...Qf4 (better 11...Bd6-+) 12.ef4= Bc5 (better 12...c6=) 13.Ne4?? (better 13.f5 Bf5 14.Nd5+/-) 13...de4-+ 14.Bd4?? (14.d3 ed3 15.Bd3-+) 14...Bd4 15.Ke2 0-1. fishfry (2030) - opperwezen (2695), Crazyhouse Shield Arena, 2018.

4.Bb2 Bd6 5.e3= 0-0 6.d3 (6.Bc4 c6=) 6...a4 (6...Re8 7.Nf3=) 7.c4 (7.Nf3 Re8=) 7...c6 8.Nc3 Qa5 9.Nge2 (9.Nf3 Bc7=) 9...Be7 10.d4 d6 11.Qd3 (11.bc6 bc6 12.Ng3 Be6=) 11...ed4 (11...Be6!? 12.e4 Nbd7=+) 12.Nd4+= (< 12.ed4 cb5 13.cb5 d5=+) 12...d5 13.cd5 Nd5 14.Rc1 (14.Be2 Rd8 15.0-0 Nc3 16.Bc3 Qc7+=) 14...Rd8= 15.bc6 (15.Qd2 Nf6 16.Qc2 Bc5=) 15...bc6 (15...Nc6 16.Qb5=) 16.Qc2 g6 (16...Ba6 17.Ba6 Ra6 18.0-0 Nc3 19.Bc3=) 17.Bc4+= Nb6 18.Ba2 c5 19.Nde2 c4 20.0-0+= Na6 21.Ne4 Be6 22.Nd4 Bd5? 23.Bc3+- Be4 24.Qe4 Qc5 25.Nc6 Rd7? 26.Bd4 Qa3 27.Bb6 Re8 28.Bc4 Rb7 29.Bd4 Nc5 30.Qe5 Bf6 31.Qe8 Kg7 32.Bf6 Kh6 33.Qf8 Kh5 34.Be2 1–0. MacChess 4.0 – ZZZZZZ, 2000.

4.Bb2 Bd6 5.e3 c6 6.Nf3 Qe7 7.c4 Bc7 8.d4 d5 (better 8...e4 9.Nfd2 0-0=) 9.de5+/- Ne4 (9...Ng4!? 10.cd5 Ne5 11.dc6 bc6+/-) 10.cd5+- cd5 11.Qd5 Nc5 12.Nc3 (12.Bd4!? Nbd7+-) 12...Be6+/- 13.Qd1 0-0 14.Be2 (14.Nd5 Bd5 15.Qd5 Rd8+-) 14...Nb3 (14...Rd8!? 15.Qc2 Nbd7+/-) 15.Rb1+- Nd7 (15...Rd8 16.Qc2+-) 16.Nd5 Bd5 17.Qd5 Nbc5 18.0-0 Rad8 19.Rfc1 b6 20.Qc6?? (better 20.Bd4+-) 20...Ne5?? (better 20...Nb8 21.Qa8 Nbd7=) 21.Ne5+- Be5 22.Be5 (22.Qb6?! Na4 23.Qa5 Nb2=) 22...Qe5 23.Qb6 Na4 (23...Rc8 24.Bg4 f5+-) 24.Qa5 Nc5 (24...Ra8 25.Qc7 Qe6 26.Qc4+-) 25.b6 Rd5 26.Bf3 Ne4 27.Qb4 Nc3 (27...Nf2 28.Kf2 Rdd8+-) 28.Qc3 Rd1 29.Bd1 (29.Bd1 Qe6 30.b7+-) 1-0. FeegLood (2820) - JoranvdS (2390), lichess.org, 2017.

4.Bb2 e4 5.d4 (5.d3!?=) 5...d5=+ 6.e3 Bd6 7.c4 c6 (7...Be6 8.cd5 Nd5 9.Nd2 Ne3 10.fe3 Qh4 11.Ke2 Bg4 12.Ngf3 ef3 13.gf3=+) 8.c5= Be7 9.a4 Be6 10.Ne2 Nbd7 11.Nf4 0-0 12.Ne6 fe6 13.g3 (13.Be2 e5=) 13...Qe8 14.Bh3 Qf7 (14...e5 15.0-0 ed4 16.ed4=) 15.0-0 Kh8 16.Nd2 Rae8 17.f3 ef3 18.Nf3 Bd8 19.Ne5 Qg8? (better 19...Qe7!? 20.Nd7 Qd7+=) 20.bc6+- Ne5 21.de5 Ne4 22.cb7 Bc7 23.Rf4 g5 24.Re4! de4 25.Qg4 Qf7 26.Qe2 Qf3? (26...Qd7!?+-) 27.Qf3 (27.Bg4!? Qf7 28.Bh5 Qd7 29.Be8 Re8+-) 27...ef3 28.c6 h5 29.Kf1?? (better 29.g4 h4 30.Kf2+-) 29...g4+= 30.Bg4 (better 30.Kf2!? gh3 31.Ba3+/-) 30...hg4=+ 31.Bd4 Rd8 (31...Kg7 32.Bc5 Rh8 33.h4 gh3 34.Bd6=) 32.Kf2=+ Rf5 Exerts pressure on the isolated pawn (better 32...Kg7=+) 33.Rb1 (better 33.h3 Kg7 34.hg4+=) 33...Be5?? (better 33...Kg7-/+) 34.Be5 Re5 35.b8Q (35.c7 Rf8 36.c8Q+-) 35...Red5 (35...Rb8 36.Rb8 Kg7 37.c7+-) 36.Qd8! Rd8 37.c7 (37.c7 Rd2 38.Kf1+-) 1-0. black_bishop_88 (2545) - gonavarrete (2565), lichess.org, 2020. (=1.a3 e5 2.b4 a5 3.b5 Nf6)

4.Bb2 h6 5.Be5+= Ng4 (5...d5!?+=) 6.Bd4+- Nf6 7.Nc3 d6 (7...Be7 8.e4 c5 9.Be3+-) 8.e4 Be6 (8...Be7 9.Bc4+-) 9.Nge2+- h5 (9...Be7 10.Nf4 0-0 11.Ne6 fe6 12.Bc4+-) 10.Nf4 Nbd7 11.Ne6 fe6 12.Bc4 e5 (12...Qe7 13.0-0+-) 13.Be3 Be7 (13...Nb6 14.Be6 Qe7 15.Nd5 Nbd5 16.ed5+- (16.Bd5?! Nd5 17.ed5 g6+-)) 14.0-0 Rf8 (14...Nc5 15.d4 ed4 16.Qd4+-) 15.d4 Nb6 (15...Rh8 16.h3+-) 16.Be6 g6 17.f4 Ng4 (17...ef4 18.Qd3 Ng4 19.e5+-) 18.Bg4 ed4 (18...hg4 19.Qg4 ef4 20.Qg6 Kd7 21.Qg4 Ke8 22.Bf4+-) 19.Bh5! Rf6 (19...gh5 20.Qh5 Double attack) 20.Bd4 gh5 21.Bf6 h4 (21...Bf6 22.Qh5 Kf8+-) 22.Qh5 White prepares e5 22...Kd7 23.Qf5 Ke8 24.e5 Qd7 25.e6 Qd8 26.Qh5 Kf8 27.Qf7 1–0. Pierre – Joseph, internet, 2020.

4.c4 d5 5.e3 d4 6.d3 Bg4 (6...Bc5 7.Nf3=+) 7.Be2= Be2 8.Ne2 Bc5 9.Ra2 0-0 10.0-0 Nbd7 (10...Re8 11.e4=) 11.ed4+= Bd4 12.Nd4 ed4 13.Nd2 Re8 (13...Nc5 14.Nf3+=) 14.Nb3 Nf8 15.a4 h6 (15...Qd6 16.Ba3 Qf4 17.g3+=) 16.f4 Qc8 (16...Qd6 17.Bb2+/-) 17.Bb2 N8d7 (17...Qf5 18.Nd4 Qc5 19.Kh1+/-) 18.Nd4 (18.Bd4 b6+/-) 18...Nb6 (18...Nc5 19.Ba3 Ne6 20.Nf5+/-) 19.Qf3+- Nbd7 (19...Ra7 20.Nb3+-) 20.Nf5 Kh8? (20...Kh7 21.Raa1+-) 21.g4 (better 21.Qg3 Rg8 22.Ne7 Qd8 23.Ng8 Kg8+-) 21...h5 (21...Kh7+-) 22.g5 (22.gh5?! Nc5 23.Ng3 Qe6+-) 22...Ng4 (22...Qd8 23.gf6 Nf6 24.Qg3+-) 23.h3 Ndf6 (23...Kg8 24.hg4 hg4 25.Qh1+-) 24.hg4 Ng4 25.Ng7 Kg8 26.Nh5 Qe6 (26...f5 27.Nf6 Nf6 28.gf6+-) 27.Nf6 Nf6 (27...Kf8 28.Ng4 f5 29.gf6 Qb6 30.Kh1 Re6 31.Ba3 Ke8+-) 28.Bf6 Qe3 29.Qe3 Re7 (29...Kf8 30.Qh3 Rad8 31.Qh8) 30.Qh3 b6 (30...Rae8 31.Qh8) 31.Qh8 1-0. Adlai – Hardanger, internet, 2020.

4.c4 d6 5.e3 c6 (5...Be7 6.d4=+) 6.Nc3 (6.d4 e4=) 6...Be6 (6...Bg4 7.Be2 Be2 8.Nge2=) 7.Nf3 h6 8.Be2 Nbd7 9.d4 e4 10.Nd2 d5 11.0-0 Be7 12.a4 (12.c5 0-0+=) 12...0-0 13.Ba3 (13.c5 Rc8=) 13...Ba3 14.Ra3 Qe7 (14...cb5 15.cd5 Qe7 16.de6 Qa3 17.Nb5+- (17.ed7 Qc3 18.Bb5 Rad8=+)) 15.Rb3 (15.c5 Rac8+=) 15...Rab8 (15...dc4 16.Nc4 cb5 17.Rb5+= (17.Nb5?! Rac8 18.Nba3 Bd5=; 17.ab5? Bc4 18.Bc4 Rfc8–+)) 16.bc6 (16.c5 Rfe8+=) 16...bc6 17.c5 Nh7 (17...Rfe8 18.Qc2+=) 18.Rb8 Rb8 19.Nb3 Qd8 20.Qc2 f5 21.Rb1 Nhf6 22.Nd2 g5 23.Rb8 Qb8 24.Qb3 Qc7 25.Ba6 Nb8 26.Qb7 Na6 27.Qa6 f4 28.Qb6 Qb6 29.cb6 Bc8 30.Nb3 Nd7 31.Na5 Nb6 32.Nc6 Bb7 33.Nb4 fe3+/– 34.fe3 Ba8? 35.a5+- Nc4 36.a6 Ne3 37.Nb5 Nc4 38.Nc7 Nb6 39.Na8 Na8 40.Nd5 Kf7 41.Kf2 Ke6 42.Nb4 Kf5 43.Ke3 h5 44.Nd5 g4 45.g3 Ke6 46.Ke4 Kd6 47.Nb4 Nb6 48.Kf5 (48...Ke7 49.Kg5+-) 1–0. Bulcourf,Carlos (2205) – Pereyra Arcija,Diego, Villa Ballester op, 1991.

5.c4 Be6 6.Qc2 Nbd7 7.g3 (7.Nf3 Be7=+) 7...c6 8.a4 (8.bc6 bc6 9.Bh3 Bh3 10.Nh3 Rb8=+) 8...Be7 (8...Rc8 9.e3–/+) 9.Bg2 Qc7 10.Nf3 (10.Na3!?=+) 10...cb5–/+ 11.Ng5 (11.ab5!? Qc4 12.Nc3–/+) 11...bc4 (11...Bc4?! 12.d3 h6 13.Nh3=) 12.Ne6 fe6 13.d3 Rc8 14.d4 (14.dc4 Qc4 15.Qc4 Rc4–+) 14...ed4 15.Bd4 d5 16.0-0 0-0 17.Nc3 Bc5 18.Nb5 Qb8 19.Bb2 Kh8 20.Rad1 Ne5 21.Nd4 Bd4 22.Rd4 Nc6 23.Rh4 Nb4 24.Qc3 Nc6 25.Rd1?? b5–+ 26.Qc2 Nb4 27.Qc3 ba4 28.g4 Na2 29.Qc2 Qb3 30.Rd2 Qc2 31.Rc2 Nb4 32.Rc1 Kg8 33.f4 Rf7 34.Bh3 Ne4 35.g5 Rc6 36.g6 hg6 37.Rg4 g5! 38.fg5 c3 39.Ba1 c2 40.Bb2 Na2 41.g6 Rf5 42.Re4 de4 0–1. Just,Joachim (2140) – Prochazka,Jiri (2145), Bratislava op, 2004.

5.c4 Be7 6.Qc2 Be6 7.d3 c6 8.a4 0-0 9.e4 Nbd7 10.Nd2 Qb6 11.Ngf3 Rfc8 (11...c5 12.Be2=+) 12.Be2 (12.bc6!? Qc6 13.d4=) 12...cb5–/+ 13.ab5 Qb5 14.Ba3 (14.cb5? Rc2 15.Ba3 Rac8–+) 14...Nf8 (14...Qc6 15.d4 Qc7 16.Qa4–/+) 15.0-0 Ng4 (15...Ng6 16.Rfb1 Qc6 17.d4–/+) 16.Qd1 (< 16.cb5 Rc2 17.h3 Nf6–/+) 16...Qe8 17.Nb3 (17.Qb3 Qc6=+) 17...Ng6 (17...b5 18.Nfd2 Nf6 19.f4–+) 18.Nfd2 Nf6 19.d4 Nf4 20.d5 Bd7 21.f3 (21.Nc1!?–/+) 21...b5–+ 22.c5 (22.g3 Ne2 23.Qe2–+) 22...dc5 23.g3 Ne2 24.Qe2 a4 25.Nc1 b4 26.Bb2 c4! 27.d6 c3 28.Bc3 Bb5 29.Nd3 Rc3 30.de7 Bd3 31.Qd1 Bf1 32.Qf1 Qe7 33.Nb1 Qc5 34.Qf2 Rc1 35.Kg2 Rc2 36.Qc2 Qc2 37.Kh3 0–1. willow27 – Double Wood, ChessWorld.net, 2005.

5.e3 c6 6.c4 Be6 7.Nf3 Be7 8.Be2 0-0 9.Nc3 Qb6 10.Qc2 d5 (10...cb5!? 11.Nb5 Nbd7=) 11.cd5 Nd5 12.bc6 (12.Nd5 Bd5 13.Bd3 Bf3 14.gf3 g6+=) 12...bc6? (12...Nc6 13.Na4 Qd8 14.Ne5=) 13.Rb1 (13.Ne5 f6 14.Nc4 Qd8+-) 13...Qc7 (13...Nc3 14.Qc3 Nd7 15.0-0=) 14.0-0 (14.Nd5!? Bd5 15.e4 Ba2+/–) 14...f6 15.d3 (15.Nd5 Bd5 16.e4 Bf7+=) 15...Na6 16.Rfc1 Nc5 (16...c5 17.Nd2+=) 17.Nd5 (better is 17.Ne4 Nb7 18.d4+/–) 17...cd5? (better is 17...Bd5 18.d4 Be4 19.Qc4 Bd5=) 18.d4+- ed4 19.ed4 Qf4 20.dc5 Rfc8 21.Qd2 Qa4?? 22.Qd4 Qc6 23.a4 Bc5 24.Qc3 Qb6 25.Qe1 Rab8? 26.Bc3 Bb4 27.Bb4 Rc1 28.Qc1 ab4 29.Bb5 1–0. Fournier,Frederic (1820) – fede4820, Active, 2011.

5.e3 Nbd7 6.Bc4 Be7 7.Ne2 0-0 8.0-0 Nb6 9.Ba2 Be6 10.Be6 fe6 11.f4 Nc4 12.Bc1 ef4 13.Nf4 Qd7 14.Nc3 e5 15.Nfd5 Nd5 16.Nd5 c6 17.bc6 bc6 18.Nc3 (18.Ne7 Qe7 19.d3 Nb6=) 18...Rf1 19.Qf1 d5 20.d3 Rf8 21.Qe2 Nd6 22.e4 Nb5 23.Nb5 cb5 24.Be3 Qc6 (24...d4 25.Bf2-/+) 25.ed5=+ Qd5 (25...Qc3 26.Qe1 Qc2 27.d4=+) 26.c4= Qc6 27.c5? (better 27.Rc1!?=) 27...Bc5-/+ 28.Rc1 Be3 29.Qe3 Qd5 30.h3 h6 (better 30...Rd8!?-/+) 31.Rc5= Qd4 32.Qd4 (worse 32.Re5 Qe3 33.Re3 Rd8=+) 32...ed4 33.Rb5 Rc8 34.Ra5 Rc3 35.a4 (35.Ra7 Rd3 36.Kf2 Kh7=) 35...Rd3 36.Rd5 Rd1 37.Kh2 d3 38.a5 Ra1 39.Rd3 Ra5 40.Rg3 Kh7 41.Rf3 Ra8 42.Rg3 Rh8 43.Rf3 h5 44.h4 Kg6 45.Kg3 Kh6 46.Re3 Ra8 47.Re6 g6 48.Kf4 Ra4 49.Re4 Ra5 50.Re5 Ra4 51.Re4 Ra5 52.Re5 Ra4 53.Re4 ½-½. FeegLood (2825) - toivok (2755), lichess.org, 2017.

5.e3 Bf5 6.Nc3 (6.Nf3 g6=) 6...h5 (6...Nbd7 7.Nf3=) 7.Bd3 (7.Qf3 Qc8 8.e4=) 7...Bg6 (7...Bd3!? 8.cd3 Nbd7=) 8.Bg6+- fg6 9.Qf3 (9.Nf3 Nbd7+-) 9...d5 (9...Qc8 10.Qe2+-) 10.Qg3 Kf7 (10...Qe7 11.Nf3 Nbd7 12.Qg6 Qf7 13.Qf5+-) 11.Nf3+- Nbd7 12.0-0 Qe8 (12...Rh6 13.e4 c6 14.d3+-) 13.e4!+- d4 (13...de4 14.Ng5 Double attack (14.Ng5 Decoy); 13...Ne4 14.Ng5 Double attack (14.Nd5 Deflection; 14.Ng5 Decoy)) 14.Ng5 Kg8 (14...Ke7 15.Nd5 Kd8 16.f4+-) 15.Na4 Bd6 (15...Rh6 16.f4+-) 16.Qb3 Kf8 17.f4! c6 (17...ef4 18.Ne6 Double attack (18.Bd4 Deflection)) 18.Ne6 (18.fe5 Be5 19.bc6 bc6 20.Ne6 Ke7 21.Nd4 Rc8+-) 18...Kg8 (18...Ke7 19.bc6 Qf7 20.cb7 (20.cd7?! Qe6 21.c4 dc3 22.Qc3 b5+-) 20...Qe6 21.ba8Q Ra8 22.Qd3+-) 19.Nc7 (19.bc6 bc6 20.Nc7 Qf7 21.Na8 Qb3 22.cb3 Ne4 23.fe5 Be5+-) 19...Qf7 20.Na8 Qb3 21.cb3 cb5 22.N4b6 Nc5 23.b4 (better 23.Rf3 ef4 24.e5 Be5+-) 23...Nd3 (23...ab4 24.Nc8 Bb8 25.ab4+-) 24.Bd4! ab4 (24...ed4 25.e5 Passed pawn) 25.fe5 Bf8 (25...Ne5 26.ab4 Kh7+-) 26.ef6 ba3 27.Nd7 g5 28.Nf8 gf6 29.Ra3 Nf4 30.Bf6 b4 31.Ra5 b5 32.Bh8 Kh8 33.Rb5 Kg7 34.Rg5 Kf8 (34...Kf6 35.Nh7 Ke6 36.Rf4 Ke7 37.Rf6 b3 38.Rg7 Ke8 39.Rf8) 35.Rf4 Ke8 (35...Ke7 36.Rg7 Kd6 37.Rf5 h4 38.d4 Kc6 39.Rd5 b3 40.Rc7) 36.Rg7 b3 37.Nc7 Kd8 38.Rff7 (38.Rf8) 38...Kc8 39.Nd5 b2 40.Rf8 1–0. Pierre – Bairty, internet, 2020.

5.e3 Bg4 6.Be2 Be2 7.Ne2 g6 8.c4 Nbd7 9.0-0 Bg7 10.Nbc3 0-0 11.d3 Re8 12.Ng3 h5 13.Nge4 Ng4 14.h3 Nh6 15.Nd2 Nc5 16.Nb3 Ne6 17.a4 c6 18.Rb1 d5 19.Ne2 cb5 20.cb5 b6 21.Qd2 Rc8 22.Rfc1 Qh4 23.Rc8 Rc8 24.Rc1 (better is 24.d4!?=) 24...Rc1–/+ 25.Qc1 (better is 25.Nbc1!? Qa4 26.Nc3–/+) 25...Qa4–+ 26.Qc2 Qb5 27.Qc8 Kh7 28.Qc2 Nf5 29.Ba3 Bf8 30.Bf8 Nf8 31.Qc8?? (31.e4 Ne7–+) 31...Kg7 (better is 31...Qb3 32.Qf8 Qd1 33.Kh2 Qe2 34.Qf7 Ng7 35.Qd5 a4–+) 32.Nbc1 Qd7 33.Qb8 Qd6 34.Qa8 Ne7 35.Nc3 d4 36.Ne4? (36.ed4 Qd4 37.N3e2–+) 36...Qc6 (36...Qc6 37.Qc6 Nc6–+) 0–1. Buck,K1 (1730) – Waterfield,J (1980), Dresden GER, 2013.

5.e3 g6 6.d3 Bg7 7.Nd2 Nbd7 8.Be2 0-0 9.Ngf3 Nc5 10.a4 b6 11.0-0 Bb7 Black intends e4 12.c4 e4 13.de4 Nce4 14.Ne4 Ne4 15.Bg7 Kg7 16.Nd4 Nc3 17.Qc2 Ne2 18.Qe2 Qg5 19.f3 Rae8 20.e4 Qc5 21.Rad1? (better 21.Qb2!?=+) 21...f5-/+ 22.Kh1 (better 22.Qe3!?-/+) 22...fe4-+ 23.fe4 Re4?? (better 23...Rf1 24.Qf1 Be4-+) 24.Ne6+/- Re6 25.Qe6 Rf1?? (better 25...Qg5 26.Qd7 Kh6 27.Qh3 Kg7 28.Rf8 Kf8 29.Rf1 Kg7 30.Qc3 Kh6+/-) 26.Rf1+- Qg5 (26...Qd4 27.Rf7 Kh6 28.Qh3 Kg5 29.Qg3 Kh6+-) 27.Qf7 (better 27.Rf7 Kh6 28.Qh3 Qh5 29.Qe3 g5 30.Qe6 Qg6 31.Qh3 Qh5 32.Rh7 Kh7 33.Qh5 Kg7 34.Qg5 Kf7 35.Qd8+-) 27...Kh6 28.Qf8 Kh5 29.Qf2 Qg4 30.Kg1 Qc4 31.Re1 (better 31.h3!? Qe4 32.Re1 Qa4 33.Kh2 Bg2 34.Qe2 (34.Kg2?! Qb5 35.Qf3 Kh6+-) 34...Kh6 35.Kg2+- (35.Qg2 Qb5 36.Re7 Qf5 37.Qd2 g5+-)) 31...Qa4+= 32.Re7 Qd1 33.Qf1 Qf1 34.Kf1 a4 35.Rc7 Bd5 36.Rh7 Kg4 37.Ra7 Bb3? (37...Bc4!? 38.Ke1 Bb5+=) 38.Kf2 Kf4 39.Ke2 (better 39.Ra6!? Ke4 40.Rb6+/-) 39...Bc4+= 40.Kd2 Bb5 41.Rb7 a3 42.Ra7 Bc4 43.Ra3 b5 44.Rg3 g5 45.Kc3 d5 46.Rf3 Ke4 47.Rf8 d4 48.Kd2 d3? (better 48...Ke5+=) 49.g3+- g4? (49...b4+-) 50.Rf4 Ke5 51.Rg4 1-0. azer3136 (2245) - Archpawn (2100), Rated Blitz game, lichess.org, 2016.

4.Bb2 d6 5.e4 (5.d4 Bg7 6.de5 Nd7 7.Nf3 Nh6 8.e4 0-0 9.Nbd2=; 5.Nc3 d5 6.Nf3 Bg7 7.e3 Ne7 8.Be2 0-0 9.0-0=; 5.Nf3 Nf6 6.Nc3 Nbd7 7.e4 Bg7 8.Bc4 0-0 9.0-0=) 5...Nf6 6.Nc3 Nbd7 7.Nf3 Bg7 8.Bc4 Nb6 9.Ba2=.

5.e3 d6 6.f4 (6.Nf3 Nf6 7.Be2 0-0 8.d4 e4 9.Nfd2=) 6...Nh6 (6...Nf6 7.fe5 Ng4 8.Nf3 Ne5 9.Ne5=) 7.Nf3 0-0 8.fe5 Ng4 (8...Nd7 9.Be2=) 9.Be2 de5 10.0-0 e4 11.Nd4 (11.Bg7 Kg7 12.Nd4 Qh4+=) 11...Ne5 (11...Qh4 12.h3 Nf6 13.Rf4=) 12.Nc3+= f5 13.g3 (13.d3 Qg5 14.Nd5 a4+=) 13...c5 14.bc6 bc6 15.Na4 Na6 16.Rb1 c5 17.Nb5 (17.Nb3!?+=) 17...Be6= 18.Be5 Be5 19.Nbc3 Qe7 20.Rb6 (20.Nb6 Ra7=) 20...c4 21.Qb1 Bf7 22.Qa2 (22.Rb7 Qd6 23.Qb5 Bc3 24.dc3 Nc7=+ (< 24...Qa3 25.Bc4 Qa4 26.Qa4+-)) 22...Qc7 23.Rfb1 Bg3 24.hg3= Qg3 25.Kh1 Qh3 26.Kg1 Qg3 27.Kh1 f4 28.ef4 Qh3 29.Kg1 Qg3 30.Kh1 Be6 31.f5?? Rf5–+ 32.Nd1 Qh3 33.Kg1 Rg5 (34.Bg4 Qg4 35.Kf1 Qg1 36.Ke2 Bg4) 0–1. Campos Calvo Sotelo,Ju (1970) – Eppinger,Georg (2250), IV Veterans Calvia ESP (5), 2007.

5.e4 Nf6 6.Qf3 d6 7.Nc3 Be6 8.Be2 0-0 9.Nh3=.

5.e4 Nh6 6.Nf3 d6 7.Bc4 0-0 8.0-0 Kh8 9.Qe2 f5 10.d3 f4 (10...Nd7 11.Rd1=) 11.h3 g5 12.Nbd2 Rf6 (12...g4!? 13.hg4 Bg4+=) 13.Ng5+/– Rg6 14.Nf7 Nf7 15.Bf7 Rh6 16.Rfe1 Qf6 17.Bh5 Qg5 18.Bg4 Nd7 (better is 18...Rg6!?+/–) 19.Nf3+- Qg6 20.Bf5 Qh5 21.d4 Nf6 (21...ed4!? 22.Bd4 Bd4 23.Nd4 Ne5 24.Qh5 Rh5+/–) 22.Bc8 Rc8 23.de5 Ng4 24.Nd4 de5?? (better is 24...Ne5 25.Qh5 Rh5+/–) 25.Nf5+- (25.Qg4?! Qg4 26.hg4 ed4+-) 25...Rg6 (25...Nf6 26.Nh6 Qh6 27.Be5+-) 26.hg4 (26.Ne7 f3 27.Qf3 Rf6 28.Qg4 Qg4 29.hg4 Re8+-) 26...Rg4 27.Ng7 Kg7 28.Be5! Kf8 29.Bf4! Qg6 30.Bg3 h5 31.Rad1 h4 32.Qf3 Kg8 33.Be5 Rf8 34.Qb3 Kh7 35.Rd7 Kh6 36.Qe3 Kh5 37.Qe2 Kh6 38.Bg7 Kh7 39.Bf8 Kh8 40.Bg7 Kh7 41.Be5 Kh6 42.Qd2 Kh5 43.f3 Qb6 44.Bd4 1–0. Yannick – Taroak, playchess.de, 2005.

5.Nf3 d6 6.e4 f5 7.ef5 Bf5 8.Bc4 d5 9.Be2=.

5.Nf3 d6 6.e4 Nf6 7.Nc3 0-0 8.Bc4 Nbd7 9.0-0 Nc5 10.Qe2 Nh5 11.g3 (11.Qe3 Nf4=) 11...Bh3 12.Rfe1 Ne6 13.Nd5 (13.Qe3 Bg4 14.Reb1 Nd4=) 13...c6 14.bc6 bc6 15.Ne3 Nd4 16.Bd4 ed4 17.Ng2 Re8 (17...d3 18.Qd3 d5 19.Ba2 Ba1 20.Ra1 de4 21.Qe4–/+) 18.Qd3= Qf6 19.Rab1 Rab8 (better 19...Bg4!? 20.Nfh4 Rab8=) 20.Rb8+= Rb8 21.e5 de5 (21...Qe7 22.ed6 Qd8 23.Nd4 Qd6 24.c3+=) 22.Ne5+- (22.Re5? Qe5 23.Bf7 Kf8 24.Ne5 Rb1 25.Qf1 Rf1 26.Kf1 Be5–+) 22...Be6 (22...Qe5 23.Re5 Be5+-) 23.Nc6+- Rc8 24.Be6 (24.Qe4 Re8+-) 24...fe6 (24...Rc6 25.Bd5 Rc8 26.Bf3+-) 25.Qc4+- Kf7?? (better 25...Kh8 26.Qa6 Rf8+-) 26.g4 1–0. Adlai – Sulky, internet, 2019.

5.f4 d6 6.Nf3 Be6 7.e3 Nd7 8.Be2 Nh6 9.0-0=.

4.cb4 b5 5.Bb2= d6 6.e4 Nf6 7.d3 (7.Bb5 c6 8.Bd3 Be7+/–) 7...Bb7 8.Nf3 Nc6 9.Be2 Be7 10.0-0 0-0 11.Nc3 Na7 12.Re1 c6 13.Qd2 Qc7 14.d4 ed4 15.Nd4 Nc8 16.Nf5 Ba6 17.Bd3 c5?? (better is 17...Ng4+/–) 18.Qf4 (18.Bb5?! Bb5 19.Nd5 Qd8+-; worse is 18.Nb5 Bb5 19.Bb5 Rb8+-) 18...c4 19.Bc2 (better is 19.Nd5 Qd8 20.Nde7 Ne7 21.Nh6 Kh8 22.Qf6+-) 19...Na7?? (19...Ne8 20.e5 (20.Ne7?! Ne7 21.Qg3 Qb6+/–) 20...Qa7 21.Nh6 Kh8 22.Nb5 de5 23.Qf7 Qf2 24.Kf2 Bb5 25.a4+- (worse is 25.Be5 Rf7 26.Nf7 Kg8+-)) 20.Rad1 Rfd8? 21.Ne7 Qe7 22.Nd5 Nd5 23.ed5 Qf8 24.Qh4 h6+- 25.Qe4 g6? 26.Qd4 f6 27.Re6 (27.Re6 Re8 28.Rf6+-; 27.Bg6?! Qg7 28.Qf6 Qf6 29.Bf6 Rf8+-) 1–0. pieeater – Darkseid, ChessWorld.net, 2012.

4.cb4 c5 5.Bb2 Qc7 (5...cb4 6.Be5 Nf6 7.ab4 Ra1 8.Ba1 Bb4; 5...Nf6 6.Be5 cb4 7.ab4 Ra1 8.Ba1 Bb4; 5...d5 6.Be5 Nc6 7.Bb2 cb4 8.ab4 Ra1; 5...Nc6 6.b5 Na7 7.Be5 d6 8.Bb2 Nb5) 6.Nc3 cb4 7.Nb5 (7.ab4 Ra1 8.Qa1 f6= (8...Bb4? 9.Nd5 Bd2 10.Kd2+-) 9.b5 Bc5 10.Nd5) 7...Qb6=+ 8.e3 (8.a4 Nc6 9.d4 ed4 10.Nf3) 8...d6 (8...Nc6 9.Rc1 d6 10.a4=+) 9.ab4= Ra1 10.Qa1 Na6 (10...Nc6 11.Qa8 Kd8 12.Qa4=) 11.Qa5 Qa5 12.ba5 Nf6 13.Be2 (13.Ba3 Kd7+=) 13...Be6 14.Nh3 Be7 (14...Bh3 15.gh3 Nb4 16.f4=) 15.0-0 (15.f4 Bh3 16.gh3 ef4 17.Bf6 gf6 18.ef4 Nb4+=) 15...0-0 16.d4 ed4 17.Bd4 Nd5 (17...Ra8 18.Nf4+=) 18.e4+/- Nf6 19.f3 (19.Bf6 gf6 20.Nf4 Nc5+=) 19...Bh3 20.gh3 Ra8 21.Rb1 (21.Rd1 Nc5+=) 21...Nc5 (21...d5 22.e5 Ne8 23.Bc3=) 22.Bc3+= Ne8 23.Bb4 Na6 24.Be1 Nc5 25.Na3. marekt – atytyot, gameknot.com, 2021.

4.cb4 Nf6 5.e3 d5 6.Nf3 (6.Bb2 Bd6–/+) 6...Bd6 (6...e4 7.Nd4 Bb4 8.Bb2–+) 7.Be2 (7.Bb2 Qe7+=) 7...Bg4 (7...e4 8.Nd4–/+) 8.0-0 e4 9.Nd4 Be2 10.Qe2 Qd7 11.Nc3 (11.Bb2 Be5=) 11...Ng4 (11...Bb4 12.Bb2 Bd6 13.d3–/+) 12.g3 (12.h3 Nf6 13.Bb2 0-0=) 12...Ne5 (12...Bb4 13.Nd5 Ba5 14.Nc3 Bc3 15.dc3+=) 13.b5 (better is 13.Nd5 0-0 14.f3+=) 13...c5–/+ 14.bc6 bc6 15.Bb2 Nd3 16.Rfb1 0-0 17.Bc1 c5 18.Nc2 Be5 Black prepares the advance d4 19.a4 Qc6 20.Qh5 (20.Bb2 Nd7 21.Ne1 Ne1 22.Re1 Rfb8–+) 20...d4 (better is 20...Bc3!? 21.dc3 Ra4–+) 21.ed4–/+ Bd4 22.Ra3? (better is 22.Nd4!? cd4 23.Nd5+=) 22...Bc3 23.Rc3 Qa4 24.Kg2 (better is 24.f3!?–+) 24...Na6 25.Ne3 Ne1 (25...Qd7!? 26.Qf5 Qf5 27.Nf5–+) 26.Kf1 Nf3 27.Nf5?? (27.d3 f5!–+) 27...Nb4 28.Kg2 Qb5?? 29.h3?? Nd3?? 30.Rb5+- Ra1 31.Ba3 Rg1 0–1. pieeater – Darkseid, ChessWorld.net, 2012.

4.c4 d5 5.Bb2 d4 6.g3 Nc6 0–1. marekt – hielker, internet, 2014.

5.Bb2 Nc6 6.ab4 Nb4?? (6...Ra1 7.Ba1 d6 8.b5+-) 7.Be5 (better is 7.Ra8 f6 8.e4+-) 7...Ra1 8.Ba1 d5?? (8...Nf6+-) 9.Bg7 Nf6 10.Bh8 Ng4 11.Nf3 c6 12.e3 Qb6 13.Be2 Bf5 14.Nd4 Nd3 15.Bd3 Bd3 16.Qb3 Qb3 17.Nb3 Bb1 18.0-0 Bd3 19.Ra1 f5 20.Nc5 Bc4 21.Nb7 Ke7 22.Bc3 h5 23.h3 Nf6 24.Bf6 Kf6 25.Nd6 Bd3 26.Ra3 Be2 27.f4 c5 28.Ra5 1–0. mgriffin (1610) – viz, net–chess.com, 2001.

5.Bb2 Bd6 6.e4 Qh4 7.Qf3 (7.Nc3 Bc5 8.Qe2 Nf6–/+) 7...Nf6 (7...Nc6 8.Bc4 Nf6 9.Nc3–/+) 8.d3 (8.Nc3 Bc5–/+) 8...Nc6 9.Bc1 (better is 9.Qe2!?–/+) 9...Nd4 10.Qg3?? (10.Qd1–+) 10...Qg3 (10...Nc2 11.Kd1 Qg3 12.hg3 Na1 13.Bb2–+) 11.hg3 Nc2 12.Kd1 Na1 13.Bg5 h6 14.Bf6 gf6 15.Be2 Nb3 16.f4 ef4 17.gf4 Bf4 18.Rh4 Be5 19.Nf3 Bg3 20.Rg4 Bf2 21.Rf4 Rg8 22.g4 Be3 23.Rf6 d6 24.g5 hg5 25.Nc3 Nd4 26.Nd4 Bd4 27.Nd5 Bf6 28.Nc7 Kd8 (29.Na8 Bd4–+; 28...Kd7 29.Na8 Bd4 30.Bh5–+) 0–1. aligarjon – ChessNo1, ChessWorld.net, 2005.

5.Bb2 Bd6 6.Nf3 Nc6 7.g3 f6 (7...Nf6 8.Bg2–/+) 8.e4 Bc5 9.Bc4 Nge7 10.0-0 d5 11.Bb3? (better is 11.ed5 Nd5 12.d4 ed4 13.Bd4 Nd4 14.Nd4–/+) 11...de4–+ 12.Ne1 g6 13.Nc2 Nd4 14.Nd4 Bd4 15.Bd4 Qd4 16.Nc3 Bh3 17.Ba4 c6 18.Re1 f5 19.Rb1 0-0-0 20.Rb2 Bg4 21.Qc2 Qd2?? 22.Rd1?? Qc2–+ 23.Rc2 Bd1 24.Nd1 Rd1 25.Kg2 Rhd8 26.Rc5 R1d5 (27.Rd5 Rd5–+) 0–1. jhaun – cdnfthree (1750), net–chess.com, 2002.

5.Bb2 Bd6 6.Nf3 Nf6 7.Ne5=+ 0-0 8.Nc4 (8.e3 Re8 9.d4 Be7=+) 8...Be7 9.e3 d5 10.Ne5 Nc6 (10...Re8 11.Be2=+) 11.Nc6= bc6 12.Bd3 (12.Qc2 c5=) 12...Ba6 (12...c5 13.0-0=+) 13.Ba6 Ra6 14.0-0 Qb8 (14...Qd6 15.d3=) 15.Qc2+= Rb6 16.Bc3 Ne4 17.d4 (17.a4 Qa7+=) 17...Nc3 (17...c5 18.dc5 Bc5 19.a4=) 18.Nc3+= Rb2 19.Qd3 Qb3 Exerts pressure on the isolated pawn 20.Rab1 (better 20.a4=) 20...Rb8?? (better 20...Ba3 21.Rfd1 Re8=+) 21.Rb2+- Qb2 22.Ne2 (better 22.Rb1+-) 22...Rb3 (22...Qa3 23.Qf5=+) 23.Qd1 (23.Qa6 Ra3 24.Qc8 Bf8=) 23...Qa3 24.Qc1 (24.Nf4 Qb4=+) 24...Qc1 (24...c5 25.Qd1-/+) 25.Rc1=+ Rb6 26.Kf1 Kf8 27.Nf4 Ke8 28.Nd3 Kd7 29.Ne5 Exerts pressure on the backward pawn 29...Ke6 30.Nc6 Bd6 31.g3 Kd7 32.Na5 Rb5 33.Nc6 Rb6 34.Na5 Ra6 (34...g5 35.Kg2=+) 35.Nb3 Ra3 36.Nd2 (36.Nc5 Ke7=) 36...f6 (36...f5 37.Ke2=) 37.Nf3 (37.Ke2 g5=) 37...g5 38.Rc2 (38.g4 h6=) 38...g4=+ 39.Nh4 Ra1 40.Kg2 Ke6 0-1. ribarisah (2035) - tryu (1975), Rated Bullet game, lichess.org, 2013.

5.Bb2 Be7 6.Be5=+ Bf6 7.Nf3 (7.Bc3 Bc3 8.Nc3 Nf6=+) 7...Nc6 (7...Be5 8.Ne5 d6 9.Nf3=+) 8.Bf6 Nf6 (< 8...gf6 9.d4+=) 9.Nc3 (9.d4 d6=+) 9...0-0 10.e4 (10.e3 Qe7=+) 10...Qe7–/+ 11.d3 (11.Bc4!?–/+) 11...Ra3–+ 12.Ra3 Qa3 13.Qc2 Qa1 14.Nd1 b5 (14...d6 15.Qb2 Qa5 16.Qc3–/+) 15.Be2 Qa5 16.Nc3 (16.Qd2 b4–/+) 16…b4 (17.Nb1 b3 18.Qc3 Qc3 19.Nc3 b2–/+) 0–1. Ramini,Edgardo – Sicker,Rolf, CiF, 2001.

5.ab4 Ra1 6.Ba3 Qe7 (6...d6 7.Qc2 Be6 8.Bb2–+) 7.Qb3 (7.Qc1 Qd6 8.Bb2 Ra8–+) 7...Na6 (better is 7...Qe6 8.Qb2 Qa2 9.Qa2 Ra2–+) 8.b5?? (8.Qb2 Ra3! 9.Na3 Nb4–+) 8...Rb1! 9.Qb1 Qa3 10.ba6 Qa6 (10...ba6 11.Nf3 Qa5 12.Qb2–+) 11.e3 Qa5 12.Nf3 Nf6 13.Qb2 0-0 14.Qe5 Qe5–+ 15.Ne5 d6 16.Nf3 Be6 17.Bd3 Bd5 18.Ke2–/+ Ng4 19.h3 Bf3 20.gf3 Nh6 21.Be4 b5 22.Rb1 Rb8 23.Bc6 b4 24.d4 b3 25.Kd2 Nf5 26.Kc3 Ne7 27.Be4 f5 28.Bd3 d5 29.Rb3 Rb3 30.Kb3 h5 31.Kb4 h4 32.Kc5 Kf7 33.Ba6 Ke6 34.Bb7 g5 35.Ba6 c6 36.Bf1 Kd7 37.Bg2 Kc7 38.e4 Kd7 39.Bh1 Ng6 40.Bg2? Nf4 41.Bf1? fe4 42.fe4 de4 43.Kc4 Kd6 0–1. Skean Du – SIRMO, ChessWorld.net, 2006.

4.Nb1!?–/+ A) 4...Nf6 5.Bb2 (5.e3 Nc6 6.Bb2 d5 7.Bb5 Bg4 8.f3 Bd7 9.Ne2 Bd6 10.Bc6; 5.c3 d5 6.Nf3 Nc6 7.cb4 Bb4 8.ab4 Ra1 9.Bb2 Ra7 10.Ne5; 5.Nf3 e4 6.Nd4 Nc6 7.Bb2 Nd4 8.Bd4 ba3 9.Nc3 d5 10.e3) 5...Nc6 6.ab4 Ra1 7.Ba1 Bb4 8.e3 0-0 9.Nf3 Qe7 10.Bb5; B) 4...d5 5.Bb2 Nc6 6.ab4 Ra1 7.Ba1 Bb4 8.Nf3 Qe7 9.e3 Nf6 10.Bb5; C) 4...Nh6 5.Bb2 Nc6 6.ab4 Ra1 7.Ba1 Bb4 8.Nf3 d6 9.Nc3 0-0 10.e4; D) 4...Nc6 5.Bb2 (5.c3 Nf6 6.Bb2 bc3 7.Nc3 d5 8.Nb5 Bd6 9.Nf3 0-0 10.g3; 5.e3 Nf6 6.Bb2 d5 7.Bb5 Bg4 8.f3 Bd7 9.Ne2 Bd6 10.Bc6; 5.d3 Bc5 6.Nf3 Qe7 7.c3 Nf6 8.d4 ed4 9.cd4 Bd6 10.Qb3) 5...Nf6 6.ab4 Ra1 7.Ba1 Bb4 8.e3 0-0 9.Nf3 Qe7 10.Bb5.

4.Nb5? c6 '–+' 5.c4 (5.Bb2 cb5 6.ab4 Ra1 7.Qa1–+ d6 8.e3 Bd7 9.Qa8 Bc6 10.Nf3) 5...cb5 6.cb5 ba3 7.Nf3 (7.Qb3 Qc7 8.Nf3 Nf6 9.e3 d5 10.b6) 7...e4 8.Nd4 Nf6 9.Qb3 (9.Qc2 b6 10.Qc3) 9...Bc5 (better 9...Qc7–+ might be the shorter path 10.e3) 10.Nf5 (10.e3 doesn't improve anything 10...Qe7–+) 10...0-0 (better 10...d6 keeps an even firmer grip 11.Ng3–+) 11.d4 (11.Ra3 does not help much 11...Ba3 12.Ba3 d5 13.Ne7 Kh8 14.Nc8 Qc8–+) 11...ed3 '!' 'Deflection: f2' 12.ed3 (12.Qd3 Qa5 Deflection Double attack) 12...d5 (12...Qa5 Deflection) 13.d4 (13.Ne3 a fruitless try to alter the course of the game 13...d4 14.Nc4 Qe7 15.Kd2 Be6–+) 13...Bf5 14.dc5 Re8 15.Kd1 (15.Be2 doesn't get the cat off the tree 15...d4–+) 15...Qe7 (better 15...Ne4 makes it even easier for Black 16.Be2 Nf2 17.Ke1 Nh1 18.Be3 Qh4 19.g3 Qh2 20.b6–+) 16.Qc3 (16.Be3 the only chance to get some counterplay 16...d4! Deflection: e3 17.Bd2–+) 16...Ne4 17.Qe3 Nc5 (better 17...Qf6 and Black takes home the point 18.f3 Nc3 19.Ke1 Re3 20.Be3 Nb5–+) 18.Qe7 Re7 19.g3 (19.Ra3 is not the saving move 19...Ra3 20.Ba3 Nbd7–+) 19...Nbd7 (19...Ra4 and Black can already relax 20.Be3 Nb3 21.Ra2–+) 20.Bg5 (20.Ra3 is the last straw 20...Rc8 21.Be3–+) 20...f6 21.Be3 (21.Bd2 cannot change what is in store for ? 21...Nb3 22.Ra2 Bb1–+) 21...Rae8 (better 21...Nb3 nails it down 22.Ra2 Bb1–+) 22.Ra3 d4 '!' 'the logical end' 23.Bd2 (23.Bd4 Re4 Combination) 23...Ne5 24.Bg2 (24.Bb4 doesn't change the outcome of the game 24...Rc7 25.b6 Rcc8–+) 24...Ned3 25.Rd3 (25.Rf1 praying for a miracle 25...Re2 26.Bd5 Kh8 27.Be3–+) 25...Nd3 26.Bd5 Kh8 27.Bc4 Nf2 28.Kc1 Rc7 29.Rf1 Rc4 30.Kb2 Rc2 (30...Rc5 31.Re1 Rb5 32.Bb4 Re1 33.Ka3 Rb1 34.h3 R5b4 35.g4 Rb6 36.gf5 Ra6) 31.Kb3 (31.Ka3 cannot undo what has already been done 31...Rd2 32.b6 Rc8 33.Rf2 Rf2 34.g4 Rf1 35.gf5 Rb1 36.Ka2 Rb6 37.h4 Ra8) 31...Rd2 32.Rc1 (32.Kc4 does not win a prize 32...b6 33.Re1 Rc2 34.Kb4 Re1 35.Ka4 Nd3 36.Kb3 Rc3 37.Ka4 Ra1) 32...Re3 (32...Nd3 33.Kc4 Rd8 34.b6 Be6 35.Kb5 Rb2 36.Ka4 Ra8) 33.Kc4 (33.Kb4 cannot change destiny 33...Nd3 34.Ka5 Nc1 35.g4 Re6 36.gf5 Ra2 37.Kb4 Re5 38.h3 b6 39.h4 h5 40.Kc4 Ra4) 33...Be6 34.Kc5 Nd3 35.Kd4 Nc1 (35...Ree2 36.Ra1 b6 37.Kc3 Ne5 38.Ra8 Bg8 39.Rg8 Kg8 40.Kb4 Re3 41.h4 Rd4) 36.Ke3 Rd3 37.Ke4 Kg8 (37...g6 38.h4 Bf5 39.Kf4 Ne2) 38.Kf4 (38.h4 is not much help 38...g6 39.b6 Bf5 40.Kf4 Ne2) 38...g5 (38...Nb3 39.h4 Nd2 40.h5 Rf3) 39.Ke4 Bd5 (39...Kf7 40.h3 f5 41.Ke5 Rd5) 40.Kf5 Kg7 41.Kg4 Kg6 42.h4 (42.Kh3 doesn't do any good 42...Kh5 43.b6 g4) 42...h5 (42...Be6) 43.Kh3 g4 44.Kh2 Rd2 (44...Rd1 45.b6 Rh1) 45.Kg1 Nd3 46.Kf1 Ne5 47.Ke1 (47.Kg1 does not solve anything 47...Bg2 48.b6 Nf3) 47...Nf3 48.Kf1 Bc4 0–1. Lahmann,Kai – Sperhake,Klaus, Buchholz sim 3rd, 1987.

4.Nd5 A) 4...ba3 5.d4 (5.c4 Nc6 6.Nf3 Nf6 7.d3 Bc5 8.Qb3 e4 9.de4 0-0 10.e3; 5.Nf3 Nf6 6.c4 e4 7.Nd4 c6 8.Nf6 Qf6 9.e3 Bc5 10.Qb3; 5.e3 Nf6 6.Bc4 Nc6 7.Nf3 Ra5 8.e4 b5 9.Bb3 Bc5 10.d3) 5...c6 6.Nc3 Bb4 7.Qd3 Nf6 8.Bd2 ed4 9.Qd4 Na6 10.Qe5; B) 4...Nf6 5.e4 Nc6 6.Bb2 ba3 7.Nf3 Bc5 8.Bd3 0-0 9.0-0 d6 10.Bc3.

3.Bb2 e4 4.c4 c5 (better is 4...f5=) 5.b5 (5.Nc3 cb4 6.ab4 Nf6+=) 5...d5 (5...ab5!? 6.cb5 d5–/+) 6.Qc2 (6.cd5 ab5 7.e3 Qd5+/–) 6...Bf5 (6...f5 7.cd5 Nf6 8.Nc3 Nd5 9.e3+=) 7.cd5+= Qd5 (7...Ne7!? 8.e3 Nd5+=) 8.Nc3+/– Qe6 9.e3 c4? (9...Nf6 10.Nh3 Bh3 11.gh3+/–) 10.Qa4?? (better is 10.Nge2 ab5 11.Nb5+-) 10...Nd7+= 11.ba6 Qa6 12.Qc4 Qc4 13.Bc4 Ngf6 14.Nge2 Ne5 15.Bb5 Kd8 (15...Bd7 16.0-0+/–) 16.0-0 (better is 16.Ne4 Be4 17.Be5 Bg2 18.Rg1+-) 16...g5? (better is 16...Bd6+/–) 17.Ng3+- Nd3?? (17...Bg6 18.Nce4 Ne4 19.Ne4 Be4 20.Be5 Rg8+-) 18.Bd3 ed3 19.Nf5 (19.Nf5 Rg8 20.Nb5+-) 1–0. Zawadzki,Krzysztof (1640) – Bergolc,Sylwester, Ferie z szachami Poland, 2009.

3.Bb2 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 a6).

3.d4 ed4 4.Nf3 Nc6 5.Nd4 Nd4 6.Qd4 Qf6 7.Bb2 Be7 8.e4 Qd4 9.Bd4 f6 10.Nc3 c6 11.Na4 Nh6 12.Nb6 Rb8 13.c4 0-0 14.c5 d6 15.Bc4 Kh8 16.0-0-0 dc5 17.bc5 Rd8 18.h3 Re8 19.g4 (19.Rhe1 Ng8+-) 19...Bd8 20.Be3 (20.Nc8 Rc8 21.f3 Bc7+/–) 20...Bb6 21.cb6 Ng8 22.f3 Be6 23.Be6 Re6 24.Rd7 Re7 25.Rhd1 Rbe8 (25...h6 26.Bc5 Rd7 27.Rd7+-) 26.Bc5 Rd7 27.Rd7 (27...g5 28.Rb7+-) 1–0. Pierred (2180) – Queen_of_hearts, Rated game, 3m + 0s, 2005.

3.e3 b5 4.Bb2 Nc6 5.c4 bc4 6.Bc4 a5 7.Nc3 (better is 7.b5!? d5 8.Be2+/–) 7...ab4=+ 8.ab4 Nb4?? (better is 8...Ra1 9.Ba1 Nb4=+) 9.Ra8+- c6 (9...Nf6 10.Nf3 Be7 11.Ne5+-) 10.Qa4 c5 11.Bb5 (11.Na2 Nc6+-) 11...Ne7 12.Ne4 (12.Nf3!? f6+-) 12...f5 (12...Ned5 13.Rb8 f6+-) 13.Nd6 1–0. mgriffin (1605) – borodin, net–chess.com, 2001.

3.e3 d5 (--> 1.b4 e5 2.a3 d5 3.e3 a6).

3.e4 Nc6 4.Nf3 h6 5.Bb2 d6 6.h3 Nf6 7.b5 ab5 8.Bb5 Ne4 9.d3 Ng5 10.Bc6 bc6 11.0-0 Qf6 12.Nbd2 Nf3 13.Nf3 Bb7 14.Re1 c5 15.a4 Bf3 16.Qf3 Qf3 17.gf3 f5 18.a5 f4 19.a6 Be7 20.c4 Bh4 21.Bc3 Bd8 22.a7 c6 23.Ra6 Kd7 24.Rb1 Bc7 25.Rb7 g5 26.Ba5 Rhc8 27.Bc7 Rc7 28.Rc7 Kc7 29.h4 gh4 30.Kh2 Kb7 31.Ra1 Ra7 32.Rb1 Kc7 33.Rb2 Ra3 34.Rd2 d5 35.Kh3 dc4 36.dc4 Rf3 37.Kh4 Rc3 38.Kh5 Rc4 39.Kh6 Rc3 40.Kg6 Rc4 41.Kf6 Rd4 42.Rc2 Rd5 43.Kf5 Kd6 44.Ke4 Rd4 45.Kf3 c4 46.Re2 Rd3 47.Ke4 Rd4 48.Kf3 c5 49.Rc2 Rd3 50.Ke2 Kd5 51.f3 Kd4 52.Kf2 c3 53.Ke2 c4 54.Rc1 Rd2 55.Ke1 Kd3 56.Rd1 Ke3 57.Rd2 cd2 58.Kd1 c3 59.Kc2 Ke2 0–1. pillsbury (2185) – valerypavlovich (2100), net–chess.com, 2014.

(--> 1.b4 a6 2.Bb2 Nc6 3.a3 e5).

4.e3 d5 (--> 1.b4 d5 2.Bb2 a6 3.e3 Nc6 4.a3 e5).

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

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

4.Bb2 Nc6 5.d4 Nd4 6.Bd4 ed4 7.Qd4 Qe7 8.Nd2 Bb7 9.Ngf3 Nf6 10.Be2 d6 11.Bd3 g6 12.0-0 Bg7 13.Rae1 0-0 14.e5 Nd7 15.Qg4 Ne5 16.Ne5 de5 17.Be4 c6 18.Qf3 Rad8 19.Nb3 Rd6 20.Nc5 Bc8 21.Rd1 Rf6 22.Qe3 Rd8 23.Rd8 Qd8 24.Bc6 Rc6 25.h3 Qd4 26.Qg5 Bf6 27.Qe3 Qe3 28.fe3 Bf5 29.Rc1 Bg5 30.g4 Be3 31.Kg2 Bc8 32.Rd1 Bc5 33.bc5 Rc5 34.Rc1 Bb7 35.Kf2 Rc3 36.h4 Rf3 37.Kg2 Ra3 38.Kh2 Bf3 39.g5 Bg4 40.c4 bc4 41.Rc4 Rh3 42.Kg2 Be6 43.Ra4 Kg7 44.Kf2 Bd5 45.Ke2 Bf3 46.Kf2 e4 47.Ra6 Rh4 48.Rb6 Rh2 49.Ke3 Re2 50.Kf4 Rg2 51.Rb5 Rf2 52.Ke3 Rh2 53.Ra5 h6 54.Kf4 h5 55.Kg3 Rh1 56.Kf2 h4 57.Rc5 h3 58.Ra5 h2 0–1. pillsbury (2055) – dianelowenstein (1950), net–chess.com, 2014.

4.Nf3 Qf6 5.Bb2 a5 6.Be5+/– Qe6 7.Bb5 Qg4 8.0-0 f6 9.Bc7 Qh5? 10.Nd4 Qd1 11.Rd1 Ne7 12.ba5 Ra5 13.Ba5 Bb7 14.Bc7 Nbc6 15.Nc6 Bc6 16.Bc6 Nc6 17.a4 g5 18.a5 Bb4 19.a6 Kf7 20.c3 Bc5 21.d4 Ba7 22.Na3 Rc8 23.Nb5 Bb8 24.Bb8 Rb8 25.Rdb1 Ke7 26.d5 Ne5 27.a7 Ra8 28.Nc7 Ra7 29.Ra7 Nc4 30.Ne6 Nd2 31.Rbb7 Ne4 32.Rd7 Ke8 33.Rh7 Nd6 34.Rh8 (34.Rhe7) 1–0. mickster the king – toon magpie, ChessWorld.net, 2005.

4.Nc3 Nc6 5.Rb1 d6 6.h3 Be7=+ 7.Nf3 Nd4 8.Be2 Bd7 9.0-0= Bc6 10.d3 0-0 11.Bb2 b6 12.Nd4+= ed4 13.Nd5 Nd5= 14.ed5 Bd5 15.Bd4 Bf6 16.Be3 Be5 17.c4+= Bb7 18.d4 Bf6 19.Bf3 c6 20.b5 ab5= 21.cb5 Rc8 22.bc6+/– Bc6 23.Bc6 Rc6 24.d5 Rc3 25.Bb6 Qa8 26.Bd4 Bd4+= 27.Qd4 Qa3 28.Ra1 Qc5 29.Rfd1 Rc8 30.Qc5 R3c5 31.Ra6 Rd8 32.f4 f5 33.g4 fg4= 34.hg4 g6 35.f5 gf5 36.gf5 h5 37.f6 Kf7=+ 38.Rf1 Rd5 39.Ra7 Kf8 40.Rh7 Rg5 41.Kh1 d5?? 42.f7+- Rd7 43.Rh8 (43...Rg8 44.fg8Q Ke7 45.Qf8 Ke6 46.Qf6#) 1–0. lesbian14 – cknarang, Live Game Caissa's Web, 2006.

4.Nc3 d5 5.ed5 Nd5 6.Bc4 Nf4 7.Qf3 Nc6 8.Nge2 =.

4.d3 c5 5.Nf3 Nc6 6.c3 –/+.

4.d3 Nc6 5.Nf3 d5 6.ed5 Qd5 7.Nc3 Qe6 8.h3 Nd4 9.Ne4 Qc6 10.Nd4 ed4 11.Qe2 Be7 12.Nf6 gf6 13.Bb2=+ Be6 14.Bd4 0-0-0 15.Rc1?? Rd4–+ 16.Qe3 Qc3 17.Qd2 Qa3 18.c3 Rd6 19.Be2 Rhd8 20.0-0 Bc4 21.Qe3?? Bd3 22.Bd3=+ Rd3 23.Qe1?? Bd6–+ 24.c4 Bb4 25.Qe2 a5 26.Ra1 Qc3 27.Rac1 Qd4 28.Kh2 Rg8 29.Rfd1 Rd1 30.Rd1 Qf4 31.Kh1 b6 32.Qg4 Qg4 (33.hg4 Rg4–+; 32...Rg4 33.f3 Rh4 34.Ra1 Qg3 35.Ra2 Bc5 36.Rf2 Qf2 37.Kh2 Qg1 38.Kg3 Bf2#) 0–1. pillsbury (2075) – olo (1920), net–chess.com, 2007.

4.Nf3 Nc6 5.Nc3 d5 6.ed5 Nd5 =+.

3.Bb2 Bb7 4.e3 Nf6 (4...f6=) 5.d3 (better is 5.Be5!? a6 6.Nf3+/–) 5...Nc6 6.Nf3 Nd4?? (better is 6...a5 7.c4 ab4 8.cb5 ba3 9.Ba3 Bb4 10.Ke2 Ba3 11.Na3 e4 12.de4 Ne4+=) 7.ed4+- ed4 8.Qe2 (8.Qe2 Be7 9.Nd4+-) 1–0. Fournier,Frederic (1940) – desigallango, Active Blind, 2007.

3.Nc3 c5 4.e4 cb4 5.ab4 Nc6 6.Nge2 a6 7.Ba3 Bb4 8.Bb4 Nb4 9.d4 d6 10.Qb1 ed4 11.Nd4 a5 12.Bb5 Bd7 13.Bc4 Bc6 14.Nc6 Qg5 15.g3 Nc6 16.h4 Qe5 17.f4 Qc3 18.Kf2 Qc4 19.Kg2 Qe4 20.Kh3 Rb8 21.Qe1 Qe1 22.Rhe1 Nge7 23.g4 0-0 24.h5 Rfe8 25.c3 Rb3 26.Kh4 Rc3 27.f5 h6 28.Rf1 Rc2 29.Rg1 f6 30.Rh1 Rc4 31.Ra3 Nf5 32.Kh3 Re3 33.Re3 Ne3 34.Rg1 g5 35.Rg3 Rc3 36.Re3 Re3 37.Kh2 a4 0–1. nimzou (1885) – armymannretired (2000), net–chess.com, 2014.

3.Nc3 Nf6=.

3.d4 ed4 4.Qd4 Nc6 5.Qd3 =+.

3.d4 e4 4.e3 (4.Nc3 a5 5.ba5 d5 6.Nb5 c6=) 4...a6 (4...a5 5.Bb5 ab4 6.Bb2=) 5.c4 (5.d5 Qf6 6.Ra2 c5=) 5...bc4 6.Bc4 (6.d5 a5 7.b5 Qf6=) 6...Bb7 (6...d5 7.Qc2=) 7.Ne2 g5 (7...d5 8.Bb3=) 8.0-0 (8.d5 Bg7 9.Nbc3 Nf6+/–) 8...d5 9.Bb3 Bd6 (9...Nf6 10.Nbc3+=) 10.f3 (better is 10.Nec3+=) 10...Qe7? (better is 10...ef3!? 11.Rf3 g4+=) 11.fe4+- Nd7 (11...Qe4 12.Nbc3 Qh4 13.g3+-) 12.e5 (12.Nec3 Ngf6 13.Bd5 Bd5 14.ed5 a5 15.ba5 Ra5+-) 12...Be5? (better is 12...Ne5 13.de5 Qe5 14.Ba4 Kd8+/–) 13.de5 Qe5 14.Nd4 Ne7 15.Nc3 c6 16.Nce2 f5 17.Bb2 Qe4 18.Rb1 Rf8 19.Bc2 Qg4 20.h3 Qh5 21.Ne6 Ng6 22.Nc7 Kd8 23.Na8 Ba8 24.Ng3 Qd1 25.Rbd1 Nh4 26.Ne2 Ke7 27.Nd4 f4 28.ef4 gf4 29.Bh7 Nb6 30.Rde1 Kd8 31.Ne6 Ke8 32.Nf8 Kf8 33.Rf4 (33...Nf5 34.Rf5) 1–0. gdraper (2035) – valerypavlovich (2120), net–chess.com, 2006.

3.e3 a6 4.c4 (4.Bb2 Nc6=) 4...bc4 5.Bc4 (5.Bb2 e4 6.Qa4 Qg5=) 5...d5 6.Bb3 Nf6 7.Nf3 (7.d4 Bd6=) 7...Bd6 (7...Bg4 8.h3 Bf3 9.Qf3=) 8.Bb2 (8.d4 e4 9.Ne5 0-0=) 8...Qe7 (8...e4 9.Nd4=) 9.h3 (9.Nc3 c6=) 9...0-0 (9...a5 10.b5=+) 10.Nc3 Bb7 (10...d4 11.Na4=+) 11.0-0= Nbd7 12.Na4 (12.d4 e4 13.Nd2 a5=+) 12...Rab8 (12...a5 13.ba5 Ra5 14.Qc2=+) 13.Rc1 c6 (13...a5 14.ba5 Ba6 15.d3=+) 14.Nc5 (14.d3 a5 15.ba5 Ra8=) 14...Nc5=+ 15.bc5 Bc7 16.d4 e4 17.Ne5 (17.Nd2 a5 18.Rb1 Ba6=+) 17...Ne8 (17...Be5 18.de5 Nd7 19.Qd4=) 18.Bc3 (18.Ba4 f6 19.Ng4 a5=) 18...f6=+ 19.Ng4 h5 (19...f5 20.Ne5=) 20.Nh2= Qf7 21.f4 f5 (21...Qg6 22.Qd2=) 22.Kh1 (22.Rf2 Bd8=) 22...Nf6 (22...Bd8 23.Rf2=) 23.Be1 (23.Rf2 Qg6=) 23...Bc8 (23...a5 24.Ba4=+) 24.Ba4= Bd7 (24...Qe8 25.Bh4=) 25.Bh4 (25.Qe2 a5=) 25...Qg6 (25...Rb2 26.Rc2 Rb7 27.Qe2+=) 26.Qe2 Ba5 (26...a5 27.Rb1+=) 27.Rb1+= Qe8 (27...Ra8 28.Rb3+=) 28.Rb8+- Qb8 29.Qa6 Qc7 (better 29...Qa8!? 30.Qe2 Bc7+-) 30.Rb1 (better 30.Bf6 Rf6 31.Rb1+-) 30...Rb8?? (better 30...Ne8+-) 31.Rb8 Qb8 32.Qa5 Qb1 33.Qe1 Qb2 (33...Qe1 34.Be1 Kf7 35.Bd1+-) 34.Bf6 gf6 35.Nf1 Qa3 36.Qa5 Kf7 37.Qa8 (better 37.Qc7 Ke8 38.Bc6 Bc6 39.Qc6 Kd8 40.Qf6 Kc7 41.Qd6 Kc8 42.Qd5 Kc7+-) 37...Qa1 38.Kg1 Qa3 (38...h4 39.Bc6 Qa8 40.Ba8+-) 39.Bc6 Qa8 40.Ba8 Ke7 (40...Be6 41.Ng3 Kg6 42.h4+-) 41.Bd5 Bc8 (41...Be8 42.Bg8 h4 43.g3+-) 42.h4 Bd7 43.Ng3 Bc8 44.Nh5 Bd7 45.Ng7 Kf8 46.Be6 Be6 47.Ne6 Kf7 48.d5 Ke7 1–0. Campos Calvo_Sotelo,Juan (1950) – Romero Jaime,Pedro (1610), 20th Championship de Madrid de Veterano, 2015.

3.e3 Nc6 4.c4 (4.Bb5!? a5 5.ba5+/–) 4...a6 (4...bc4 5.Bc4 d5 6.Bb5=) 5.cb5+= ab5 6.Bb2 Bd6 (6...Ba6!?+=) 7.Bb5+/– Bb7 8.Nf3 Nf6. vampierketjen – tibo (1640), net–chess.com, 2003.

3.e3 d5 4.Bb2+/– e4 5.d3 Qe7 (5...ed3!? 6.Bd3 c6+=) 6.de4+/– Qe4 (6...de4 7.Bb5 c6 8.Be2+/–) 7.Nf3 (7.Nc3 Qe6 8.Nd5 Qd6 9.Bb5 c6+-) 7...Bg4? (7...c6 8.Bd3 Qe7 9.0-0+=) 8.Be2 (better is 8.Nc3 Bf3 9.gf3+- (9.Qf3?! Qf3 10.gf3 c6+=)) 8...Bd6?? (better is 8...c6+=) 9.Bg7+- Ne7 (9...c6 10.Bh8 a5 11.Nbd2+-) 10.Bh8 (10.Bb5 c6 11.Bd3 Qe6 12.Bh8 Ng6+-) 10...Nd7 (10...c6 11.Nbd2 Qg6 12.Bd3+-) 11.Bb2 (11.Nc3 Qe6 12.Nb5 Bf3 13.Bf3 Ne5+-) 11...0-0-0 (11...c6 12.Nbd2 Qg6 13.Bd3+-) 12.Nc3 Qg6 13.Nb5 Nb6 14.Na7 Kb7 15.Nb5 Rg8 16.Nd6 Qd6 17.g3 h5 18.Nd4 Be2 19.Qe2 h4 20.0-0-0 Nc4 21.Qd3 Nb2 22.Kb2 Ra8 23.Qb5 Kc8 24.Qe8 Kb7 25.Qf7 Nc8 26.Qf3 Nb6 27.Ra1 Nc4 28.Kb3 Nd2+/– 29.Kb2 Nf3?? 30.Nf3+- Rf8 31.Nh4 Rf2 32.Raf1?? Qe5?? 33.Kb1+/– Qe3 34.Rf2 Qf2 35.Kb2 Qd4 36.c3 Qf2 37.Kb3+/– Qf7 38.Kb2 Qf2 39.Kb3 Qf7 40.Kb2?? Kc6?? 41.Rc1+- Qf2 42.Rc2 Qb6 43.Ng2 Kb5 44.Nf4 Qc6 45.Nd3 Ka4 46.Nc5 Kb5 47.a4 Kb6 48.Kb3 Qg6 49.a5 Kc6 50.a6 Kb6 51.Ra2 Ka7?! 52.Ra5 Qf7?? 53.Ra2 d4 54.Ka3 dc3? 55.Rc2+- Qf3 56.b5?? Kb6= 57.Kb4 c6?? 58.bc6 Qc6? 59.Rc3+- 0–1. Fournier,Frederic – alfaromeo, Active, 2007.

3.e4 a6 4.Bb2 Nc6 5.c4 d6 6.cb5 ab5 7.Bb5 Bd7 8.Nf3 Nf6 9.Qe2 (9.Qc2 Ne7 10.Bd7 Qd7+-) 9...Be7+/– 10.0-0 0-0 (10...Rb8 11.Rc1 Rb6 12.Nc3+-) 11.Rc1+- Na7 (12.Bd7 Qd7+-). nitousche – Ginger Prince, ChessWorld.net, 2004.

3.e4 Ba6 4.Nc3+/– Nc6 5.Bb5 (5.Bb2 Nf6 6.Nf3 Be7+/–) 5...Bb5+= 6.Nb5 a6 (6...a5!?+=) 7.Nc3+/– Nd4 (7...Bd6 8.Nf3+/–) 8.Nf3 Nf3 (8...Bd6 9.0-0+/–) 9.Qf3 f6 (9...Bd6 10.d3+/–) 10.Qh5 (10.0-0 Bd6+-) 10...Ke7 (better is 10...g6 11.Qe2 Bh6+-) 11.Nd5 Kd6 (11...Ke6 12.f4 c6 13.f5 Kd6 14.Ne3+-) 12.c4 (12.Bb2 c6 13.Ne3 Kc7+-) 12...g6 (12...Ne7 13.d4! Nd5 14.de5 Kc6 15.cd5 Kb7 16.0-0+-) 13.Qh3 Ne7 14.c5 Kc6 15.Nf6 Bg7 16.Ng4 d6 17.Qc3 (17...Kb7 18.0-0+-) 1–0. pillsbury (1935) – sbderkach (1905), net–chess.com, 2007.

3.e4 Nf6 4.Nc3 (4.Bb5 a5+=) 4...Bb7 5.d3 d6 (better is 5...c5!? 6.Bd2 a6+=) 6.Nb5+= a6 7.Nc3 Nc6 8.Bb2 d5 9.ed5 Nd5 10.Qd2 Nc3 11.Bc3 Be7 12.Nf3 Qd5 13.0-0-0 (13.Be2 0-0+=) 13...Bf6 (13...a5 14.Qe2 ab4 15.ab4+=) 14.Ng5 (14.Qe3 0-0+=) 14...h6 (14...a5 15.ba5 Qa2 16.Ne4+=) 15.Ne4= Bc8 (better is 15...Be7 16.Re1 0-0=) 16.Nf6+/– gf6 17.f4 (17.d4 Qa2 18.d5 Ne7+-) 17...Nd4 (17...a5 18.ba5 Qc5 19.Bb4+/–) 18.fe5 fe5 19.Rg1 (19.Re1 Be6 20.Qe3+/–) 19...Qa2? (19...Be6!? 20.Re1 c5+=) 20.Bb2 (20.Re1 Be6 21.Re5 0-0-0+-) 20...Rb8? (20...Be6 21.Re1 f6 22.Qf2+/–) 21.Qc3 (21.Qe3 Qe6+-) 21...c6? (21...Be6 22.Re1 (22.Qc7? Rc8 23.Qc8 Bc8–+) 22...Qd5 23.Qc7=) 22.h3 (better is 22.Re1!? Qe6 23.Qc4 Qc4 24.dc4+- (24.Re5?! Qe6 25.Bd4 Rg8+/–)) 22...0-0 23.Qc5 Be6 (better is 23...f6!? 24.Qc4 Qc4 25.dc4 Nf5+/–) 24.Qe5+- Nb5?? (24...c5+-) 25.Qg3 1–0. Ferzan – Rookmaster, playchess.de, 2002.

4.e3 a6 5.Nf3 d6 6.c4 Bg4? (better is 6...bc4!? 7.Bc4 Nf6+=) 7.cb5+/– Na7 8.ba6 Qd7 (8...e4 9.h3 Bd7 10.Nd4+-) 9.Nc3 c6 10.Be2 Nf6 11.0-0 Be7 12.a4 d5? (better is 12...e4 13.Ne1 Be2 14.Qe2 0-0+-) 13.Ne5 Be2 14.Nd7 Bd1 15.Nf6 Bf6 16.Rfd1 Rb8 17.b5! 0-0 18.Rdb1 d4 19.Ne4 Bh4 20.Bd4 Rfe8 21.Ba7 Ra8 22.b6 h6 23.Nd6 Red8 24.Nc4 Bf6 25.d4 c5 26.Ne5 Be5 27.de5 Kh7 28.Rd1 Re8 29.f4 Kg6 30.Rd7 Kf5 31.Rf7 Ke4 32.Kf2 c4 33.Rc1 1–0. Fournier,Frederic (2215) – Dupont,Pierre, Grand Prix Oise, 2002.

4.e4 a6 5.Nf3 Nf6 6.d3 (6.Ne5 Ne5 7.Be5 Ne4+=) 6...Be7 (6...d6 7.c4=) 7.Be2 0-0 (7...d6 8.0-0=) 8.0-0 d5 9.ed5 Qd5 10.Nc3 Bg4?? (better is 10...Qd6=) 11.Nd5+- Nd5 12.c4 (12.Ne5!? Be2 13.Qe2 Bf6+-) 12...bc4 13.dc4 Nf6 (13...Nf4 14.Qc2 Rad8 15.Rae1+-) 14.Re1 (14.Ne5 Ne5 15.Be5 Rad8+-) 14...Rad8 (14...e4 15.Nd4 Bd7 16.Bd3+-) 15.Qc1 White plans c5 (15.Qa4 Bd7 16.b5 ab5 17.cb5 Ra8+-) 15...Bf3 (15...e4 16.Ng5 Be2 17.Re2+-) 16.Bf3 Nd4 17.Bd4 Rd4 18.c5 (18.Re5 Bd6 19.Ra5 Ng4+-) 18...h6 (18...e4 19.Qc3 Rfd8 20.Rad1+-) 19.Rb1 (better is 19.Re5 Bd8+-) 19...e4 20.Bg4! Ng4 21.a4 Bf6 22.Qf4 e3–/+ 23.Qf3? ef2–+ 24.Qf2 Nf2 25.Kf2 Rfd8 26.h3 Rf4 27.Kg3 Bh4 28.Kf4+= Rd4?? 29.Kf3?? Be1= 30.Re1 Kf8 31.g4?? Rb4–+ 32.h4 Ra4 33.h5 Rc4 34.Rb1? Rc5 35.Kf4 Rb5 36.Rd1 Ke7 37.Re1 Kf6 38.Kg3 Re5 39.Rc1 c5 40.Kf4 Ke6 41.Rb1?! Rd5 42.Rb6 Rd6 43.Rb7 Rd4 44.Kf3 c4 45.Rb6 Rd6 46.Rb2 Rd3 47.Kf4 c3 48.Rc2 a5 49.Ke4 Rg3 50.Kd4 a4 51.Kc4 a3 52.Ra2 Rg4 53.Kc3 Rg3 54.Kb4 f5 55.Re2 Kf6 56.Rc2 1–0. pieeater – irish paddy, ChessWorld.net, 2013.

4.e4 Bb7 5.Bb5+= a5 6.c3 ab4= 7.cb4 Nd4 8.Bd3 c5 9.b5 d5=+ 10.Nc3 c4 11.Bb1 Nb3 12.Ra2 d4–/+ 13.Nce2 Bc5 14.Nf3= Qd6 15.Ne5 Qe5–/+ (16.d3 c3 17.Bc3 dc3 18.Qb3 Nf6 19.Qc3 Qc3 20.Nc3 Ba3–/+) 0–1. Scheepers – Marshall, email CTON, 1996.

4.e4 Rb8!?=.

4.e4 Nf6 5.Bb5+/– Nd4 (5...a5 6.Bc6 dc6 7.Be5+/–) 6.Bd4 ed4 7.e5 Nd5 (7...Ne4 8.Nf3+/–) 8.Qf3 (8.Qg4 Bb7+/–) 8...Bb7 (8...Nb6 9.Ne2+/–) 9.Bc4 (9.Ba6 Bc6 10.Qg3 Qb8+/–) 9...c6 (9...Qe7 10.Qe4 f5 11.Qd4+=) 10.Qg4 (10.Ne2 Qe7 11.Bd5 cd5+/–) 10...g6 (10...Nb6!? 11.Be2 h5+/–) 11.Qd4+- Be7 (11...Nb6 12.Nf3+-) 12.Nf3 (12.Bd5 cd5 13.Nc3 d6 14.ed6 Bf6 15.Qe3 Kd7+-) 12...0-0 13.0-0 (13.Bd5 cd5 14.0-0 d6+-) 13...d6 14.Nc3 (14.Bd5 cd5 15.Re1 de5 16.Ne5 Bf6+-) 14...de5 15.Ne5 Nc3 (15...Nb6 16.Qf4+-) 16.Qc3 Bf6 (16...a5 17.Rfe1 ab4 18.Nf7 Rf7 19.Qb3+- (19.Bf7?! Kf7 20.ab4 Ra1 21.Ra1 c5+/–)) 17.d4 Re8 (17...Qd6 18.Rfe1 Kg7+-) 18.Bf7 (18.Bf7 Kg7 19.Be8 Qe8 20.Rfe1+-) 1–0. Wall,Bill – BlackCat, internet, 2003.

4.g3 Bb7 5.Nf3 f6 6.Bg2 Nge7 7.Nc3 Nf5 8.e4 Nfd4 9.Nd4 Nd4 10.Nd5 Bd5 11.ed5+= Bd6 12.Bd4 ed4= 13.0-0 c5? 14.dc6+- Rc8 15.Qe2 Be7 16.cd7 Qd7+/– 17.Rac1 Rc2? 18.Rc2 0-0 19.Bc6 Qf5 20.d3 Bd6 21.Be4 Qh3 22.Rc6 Be5 23.Rfc1 g6 24.Rc8 Rc8+= 25.Rc8 Qc8 26.Qa2 Kg7 27.a4 a6 28.ab5+/– ab5 29.Qa7 Kh6 30.Qa6?? Qa6–+ 31.h4 Qa1 32.Kg2 Kh5 33.f4?? Qb2 34.Kh3 Bb8 35.g4 Kh6 36.g5 fg5 37.fg5 Kg7 38.Kg4 Qb4 39.h5 Qe1 40.h6 Kf8 (41.Bg6 Qg3 42.Kf5 Qf3 43.Ke6 Qc6 44.Kf5 hg6 45.Kg4 Qg2 46.Kh4 Qg3) 0–1. Pawno Paul – I need chocolate..., ChessWorld.net, 2005.

4.d4 ed4 5.Qd4 Nc6= 6.Qd5 Bd7 7.Qb5 Nf6 8.Qg5 Ne4 9.Qd8+/– Rd8 10.Nc3 Nd4 11.Ne4+- Nc2 12.Kd2 Na1 13.Ba1 f6 14.Nf6! (14...gf6 15.Bf6+/–) 1–0. marus – rajandchess, internet, 2001.

4.d4 ed4 5.Qd4 Nf6 6.e3 Be7 7.Bb5+/– Bd7 8.Bd7 Qd7 9.Nf3 0-0 10.Qf4 Qa4 11.Nd4 c5 12.Nf5+- Nd5?? 13.Qh6!! Bf6 14.Bf6 gf6 15.Qg7# 1–0. orane – Johansson, Live Game Caissa's Web, 2005.

4.d4 f6 5.e4 Bd7 6.c4 a6 7.Nf3 Ne7 8.Nc3 c6 9.Be2 Ng6 10.0-0 Be7 11.Rc1 0-0 12.cb5 ab5 13.d5 Nf4 14.dc6 Ne2 (Better is 14...Nc6!? 15.Bb5 f5+/–) 15.Ne2+- Bc6 16.Rc6! Nc6 17.Qd5 Kh8 18.Qc6 Rc8 (18...f5 19.ef5 Qc8 20.Qc8 Rac8 21.Nc3+-) 19.Qb5 Rc2 20.Rb1 Qc7 21.Qd3 Rc8 22.Ne1 Rc4 23.Rc1 Rc1 24.Bc1 Bd8 25.Be3 Qc4 26.Qc4 Rc4 27.f3 Rc6 28.b5 Rc4 29.b6 Ra4 30.b7 Bc7 31.Nc2 Rc4 32.Nb4 Bb8 33.Na6 1–0. orane (1995) – maxs, Live Game Caissa's Web, 2004.

4.d4 Nf6 5.de5 de5 6.Qd8 Kd8 7.Nf3 +=.

4.e3 a6 5.c4 Bd7 6.Nf3 Bc6 7.Nc3 e4 8.Nd4+/– Nf6 9.Be2 Be7? 10.Qc2 0-0 11.Nf5?? bc4+= 12.Bc4 d5 13.Be2 Nbd7 14.0-0 Ne5? 15.f4 Nc4 16.Bc4 dc4+= 17.Ne2 Bb5 18.Rfe1 Qd7 19.Nfg3 Qd3 20.Qd1 Ng4 21.Rc1 Bh4? 22.Nd4+- Bg3 23.hg3 Rac8?! 24.Rc3 c5?? 25.Rd3 cd3 26.Qg4 g6 27.Nb5 ab5 28.Qg5 Rc6 29.Qh6 f6 30.Qh3 cb4 31.Rc1 Rd6 32.Rc8 b3 33.Rf8 Kf8 34.Qc8 Kf7 35.Qc7 Ke6 36.Bf6! h5 37.Qe7 Kd5 38.Qf7 Re6 39.Bb2 Kd6 40.f5 gf5 41.Qf5 Kd7 42.Qb5 Rc6 43.Qd5 Kc7 44.Qe4 Rc2 45.Qd3 Rb2 46.Qc3 Kd6 47.Qb2 (47...Ke6 48.Qb3 Kf6 49.Qb6 Kg7 50.Qd4 Kf7 51.Qd5 Ke7 52.d4+-) 1–0. Serowy,Reinhold – Wiebke,Elfriede, Brandenburg–ch Seniors, 2003.

4.e3 a6 5.Qf3 c6 6.c4 Bb7 7.cb5+/– Qd7 8.Bd3 cb5 9.Qg3 g6 10.Nf3 Bf3 11.Qf3+= Ra7 12.Nc3 Nh6 13.Nd5 Qe6 14.Nf6 Ke7= 15.Nd5 Kd7 16.Rc1 a5?? 17.Bb5 Kd8 18.ba5 Ra5? 19.a4 Nf5? 20.Nb6 Bg7 21.Qb7 Rb5 22.ab5 Nd7 23.Nd5 Qd5 24.Qd5 h5 25.Qf7 Rh6 26.Bc3 d5 27.Ba5 (27...Nb6 28.Bb6#) 1–0. coolerdude – aligarjon, ChessWorld.net, 2005.

4.e3 c6=.

4.e3 Nf6 5.Bb5+/– Bd7 6.Bd7 Qd7 7.d3 Qf5 8.Nd2 Ng4 9.Ngf3 Be7 10.0-0 d5? 11.h3+- Nh6 12.Be5 Bf6 13.Bf6 Qf6 14.Nd4 Nf5 15.Nb5 Na6 16.Re1 0-0 17.Nf3 c6 18.Nbd4 c5 19.Nf5 Qf5 20.bc5 Nc5 21.Rc1 Ne6 22.d4 Rab8 23.c4 dc4 24.Rc4 Rb2 25.Qc1 Rb3 26.Rc8 Qb5 27.Rf8 Nf8 28.Nd2 Rd3 29.Nc4 h6 30.Qc2 Rb3 31.Rd1 Ng6 32.d5 Nh4 33.d6 Qc6 34.f3 Rb8 35.d7 Rd8 36.Qd3 Qg6 37.Qg6 Ng6 38.Na5 Ne5 39.Rd5 f6 40.Nb7 Rd7+/– 41.Rd7 Nd7 42.Kf2 Kf7 43.e4 Ke6 44.Ke3 Ke5 45.f4 Ke6 46.Kd4 f5 47.Nd8 Kf6 48.e5 Ke7 49.Nc6 Kf7 50.Na7 g5 51.g3 h5 52.fg5 Nf8 53.Kd5 Kg6 54.h4 Kf7 55.Kd6 Ke8 56.e6 Ng6 57.Nb5 Ne7 58.a4 Nc8 59.Ke5 Nb6 60.Nc3 Nc4 61.Kf5 Ke7 62.g6 Nd6 63.Ke5 Ne8 64.a5 Kf8 65.Nd5 Kg7 66.a6 Kg6 67.a7 Ng7 68.a8Q Kh6 69.Qh8 Kg6 70.Nf4# 1–0. mat69 – monkfist, ChessWorld.net, 2006.

4.e4 a6 5.Nf3 Nf6 +=.

4.e4 c6 5.d4 ed4 6.Qd4=.

4.e4 Nf6 5.Bb5 c6 6.Bd3 Be7 7.h3 (7.Nf3 0-0+/–) 7...Nbd7 8.Nc3 0-0 9.Nf3 Rb8 10.Qe2 (10.Na4 d5 11.Ne5 Ne5 12.Be5 Bd6 13.Bd6 Qd6+/–) 10...Bb7 (10...a5!?+=) 11.0-0+/– a6 (better is 11...Nh5!?+/–) 12.Ba6+- Ba6 13.Qa6 Qc7 (13...d5 14.d4 Ne4 15.Ne4 de4 16.Ne5 Ne5 17.de5+-) 14.Qe2 (14.Rfe1 h6+-) 14...c5? (14...d5 15.Rfe1 Rfe8 16.ed5 cd5 17.Rac1+/–) 15.Na2 (better is 15.b5!? g6+-) 15...Qc6 (15...cb4 16.Nb4 Qb7 17.d3+-) 16.d3 d5 (16...Nh5 17.Ne5 de5 18.Qh5 cb4 A) 19.Be5?! g6 20.Nb4 Bb4= (20...gh5?? 21.Nc6 Ne5 22.Ne7 Kg7 23.Rfb1+-); B) 19.Nb4 Bb4 20.ab4 Qc2 21.Ba3+- (21.Be5?! g6 22.Qg5 f6 23.Bf6 Nf6=)) 17.Ne5 Ne5 (17...Qe6 18.Rfe1 d4 19.Nd7 Nd7 20.c3 dc3 21.Nc3 cb4 22.ab4 Bb4 23.d4+-) 18.Be5 Rbe8 19.Bf6 (better is 19.ed5!? Nd5 20.c4 Nb6+-) 19...Bf6 20.Rae1 de4 (20...Qa4 21.bc5 Qa3 22.c3+-) 21.de4+- cb4 (21...Qe6 22.c4+-) 22.Nb4 Qd6 (22...Qa4 23.Qd3+-) 23.Qd3 Qf4 (23...Qd3 24.cd3 Bb2 25.a4+-) 24.Nd5 Qe5 25.Nf6 (25.Re3!? Be7 26.f4 Qd6+-) 25...Qf6 26.Rd1 (26.Rb1 Rc8+-) 26...Rd8 (26...Rc8 27.a4+-) 27.Qf3 (27.Qe2 Ra8+-) 27...Qc6 (27...Qf3 28.gf3 Rc8 29.a4+-) 28.Rd8 Rd8 29.Rd1 Rc8 (29...Re8 30.e5! Qc2 31.Rd7+-) 30.Qd3 (30.Rd2 Re8+-) 30...Qe8 (30...g6 31.Rd2+-) 31.Qd7 Qe6 (31...Kf8 32.Qf5 Kg8+-) 32.Qd8 (32.Qd8 Qe8 33.Qe8 Re8 34.Rb1+-) 1–0. Tenev,Bogdan – Stathopoulos,Fotios (1635), 141st MGU Open, 2015.

4.e4 Nf6 5.Bb5+/– Bd7 6.Bd7+= Nbd7 7.Nc3 Be7 (7...c6 8.Nf3+/–) 8.Nge2 (8.Nf3 Rb8+/–) 8...0-0 (8...c6 9.0-0+/–) 9.0-0 Nb6 (9...c6 10.d4+/–) 10.d4 Nc4 11.Bc1 Ng4 (11...c6 12.d5+/–) 12.h3 Nf6 13.f4 (13.d5 a5 14.b5 Nd7+-) 13...ef4 (13...ed4 14.Qd4 Nb6 15.Be3+/–) 14.Qd3+- Nb6 15.Bf4 Nh5 (15...d5 16.Nd5 Nbd5 17.ed5 Nd5 18.Rae1+-) 16.b5 (16.Be3 Bg5+-) 16...Nf4 (16...Re8 17.a4+-) 17.Nf4 Bg5 18.a4 (18.Nfd5 Qd7+-) 18...Bf4 19.Rf4 Nd7 (19...a5 20.ba6 c6 21.Rb1+-) 20.Raf1 (20.a5 Nf6+-) 20...Nf6 (20...a6 21.Nd5+-) 21.e5 de5 (21...Nd7 22.ed6 cd6 23.Qf3+-) 22.de5 Qd3 23.cd3 Nd7 24.d4 Nb6 (24...Rae8 25.Nd5 Nb6 26.Nc7+-) 25.a5 Nc4 26.Nd5 Nd2 (26...Na5 27.Ne7 Kh8 28.Rf7 Rf7 29.Rf7+-) 27.Rc1 (27.Nc7?! Nf1 28.Na8 Ng3+-) 1–0. Seckler,Siggi (2190) – Neffgen,Dieter (1840), RSS5D easy–1, 2003.

4.Nf3 Bb7 5.e3 c6 6.c4 a6 7.Nc3 Qc7 (7...Nf6 8.e4+=) 8.cb5 (8.Rc1 Qe7+=) 8...cb5 9.Rc1 Bf3?? (better is 9...Qe7+=) 10.Qf3+- (10.gf3?! Qb7+=) 10...Ra7 11.Nd5 (better is 11.Nb5 Qc1 12.Bc1 ab5 13.Bb5 Nd7 14.d4+-) 11...Qb7 (11...Qd8 12.d4 Nd7 13.Bd3+/–) 12.Bd3 (12.Rc7 Qc7 13.Nc7 Rc7+-) 12...Ne7 (12...Nd7 13.Nc7 Ke7 14.Nd5 Ke8 15.Be4+-) 13.Be4 (13.Nc7!? Qc7 14.Rc7 Rc7+-) 13...Nd5 14.Bd5 Qe7?? (better is 14...Qd7+-) 15.Rc8 Kd7 (15...Qd8 16.Qf5 f6 17.Qe6 Re7 18.Rd8 Kd8 19.Qd6 Kc8+-) 16.Qg4 (16.Qg4 Qe6 17.Be6 fe6 18.Rb8+-) 1–0. Joerke,Siegfried – Schoeb,Peter, Open, Winterthur SUI, 2004.

4.Nf3 c6 5.a4=.

4.Nf3 Nf6 5.e3 Be7 (5...e4 6.Nd4 (worse is 6.Bb5 c6+=) 6...a6 7.d3=) 6.c4 (better is 6.Bb5!? c6 7.Be2+/–) 6...bc4 7.Bc4 0-0 8.0-0 d5 9.Be2 c6? (better is 9...e4!? 10.Ne5 c5 11.bc5 Bc5=) 10.Ne5 Bd6 11.Qc2 Be5 12.Be5 Ne4 13.d3 Ng5 14.Nd2 f6 15.Bb8 Rb8 16.Qc6 Bb7 17.Qc5 d4 18.Qd4 (18.Qa7!? Ne6+-) 18...Qd4 19.ed4 Rfe8 20.Rfe1 Rbd8 21.Nf3 (21.Rac1!? Rd4 22.Rc7 Rd3 23.Bd3 Re1 24.Nf1 Bd5+-) 21...Nf3 22.Bf3 Re1 23.Re1 Bf3 24.gf3 Rd4 25.Rd1 Rf4 26.Kg2 g5 27.Kg3 h5 28.d4 h4 29.Kg2 Kf7 30.d5 Rf5? (better is 30...Ke7+-) 31.d6 (31.d6 Ke8 32.Rd4+-) 1–0. Fournier,Frederic (2000) – oscarchiquitok2 (1825), Active (5/0), 2004.

4.Nc3 Ba6 5.Nf3 Nf6 6.e4 0-0 7.Bd3 Nc6 8.a4 ba4?? 9.Ba6+- Nb4 10.Bb5 Bc5 11.Na4 d6 12.Ba3 Ne4 13.Nc5 dc5 14.Bb4 cb4 15.Bc6 Nf2 16.Kf2 Rb8 17.Ra7 b3 18.cb3 Qd6 19.Qc2 Rbd8 20.Rd1 Qb4 21.Ng5 h6 22.Qh7# 1–0. cobynrg – Rommel, internet, 2007.

4.d3 c5 5.bc5+/– Bc5 6.Be5 f6 (6...Nf6 7.e3+/–) 7.Bb2 b4 (7...a6 8.e4 Qe7 9.Nd2+/–) 8.a4 (8.e3 ba3 9.Na3 Qb6+-) 8...Qa5 (8...d5 9.e3+/–) 9.Nd2 Qb6 (9...Be7 10.c4+/–) 10.e3 Be3? (better is 10...Be7+/–) 11.fe3 (11.Qe2!? Ne7 12.fe3 0-0+-) 11...Qe3 12.Qe2 Qe2 13.Be2 Ne7 14.Bh5 Ng6 15.Ngf3 0-0 16.Bg6 hg6 17.0-0 Re8 18.Rfe1 Re1 19.Re1 Kf7 20.Nc4 Ba6 21.Nd6 Kg8 22.Re8 Kh7 23.Nd4 Kh6 24.Bc1 g5 25.Bd2 g6 26.Bb4 Kg7 27.Ba5 Kh7 28.Bc7 Nc6 29.Nc6 Re8 30.Ne8 dc6 31.Nf6 Kg7 32.Ne4 Kh6 33.g4 Bc8 34.h3 a6 35.Bd8 c5 36.Bg5 Kg7 37.Nc5 a5 38.Bd8 Kf7 39.Ba5 Ke7 40.Bb4 Kf6 41.a5 Ke5 42.a6 Ba6 43.Na6 Kd4 44.h4 Ke5 45.h5 gh5 46.gh5 Kf6 47.h6 Kg6 Plans c4 48.Bd2 Kh7 If Black now would get c4 in, he might survive 49.c4 Kg8 50.c5 Kf8 51.c6 Ke8 52.h7 (52.h7 Ke7 53.h8Q Ke6 54.Qf8 Kd5 55.Nb4 Ke6 56.Bg5 Ke5 57.Qf6#; 52.c7 Kd7 53.h7 Ke7 54.h8Q Ke6 55.c8Q Kd6 56.Qf6 Kd5 57.Qce6#) 1–0. Bah,Ismael (1765) – Ringayen,Francinel, Saint Denis RUF, 2012. s

4.d3 Nf6!?=.

4.Nf3 Qf6 +=.

4.Nf3 Nc6 A) 5.a4 ba4 6.Ra4 Bb7 7.Bb2 Nf6 8.e3 e4 9.Nd4 Nb4 10.Be2 g6 11.Nb3; B) 5.e3 B1) 5...Bb7 6.Bd3 (6.a4 ba4 7.Ra4 Bb4 8.Bb2 a5 9.Nb5 Nf6 10.Ne5 0-0 11.Ng4; 6.Bb2 Nf6 7.h3 Be7 8.Be2 0-0 9.0-0 d5 10.d3 d4 11.Ne4; 6.h3 Nf6 7.Be2 Bd6 8.0-0 0-0 9.d3 Qe7 10.Bb2 Nd8 11.Ng5; 6.d4 Bd6 7.Ne4 Nf6 8.Nd6 cd6 9.de5 de5 10.Qd6 Ne4 11.Qd5; 6.g3 Nf6 7.Bb2 e4 8.Ng5 d5 9.Bg2 Bd6 10.0-0 0-0 11.d4) 6...d5 7.e4 d4 8.Ne2 Nf6 9.0-0 Be7 10.Ng3 0-0 11.Bb2; B2) 5...Nf6 6.a4 (6.Be2 Bb7 7.Bb2 Bd6 8.Ng5 0-0 9.0-0 Be7 10.f4 h6 11.fe5) 6...ba4 7.Ra4 Bb7 8.Ba3 d5 9.d4 e4 10.Nh4 Rb8 11.Ba6; C) 5.d4 ed4 6.Nd4 Bb7 7.Bf4 Nf6 8.e4 Bd6 9.Bd6 Nd4 10.Qd4 cd6 11.a4; D) 5.e4= D1) 5...Bb7 6.Bd3 (6.Bb2 Nf6 7.Bd3 Bd6 8.0-0 0-0 9.Re1 g6 10.Nd5 Re8 11.g3; 6.Be2 Bd6 7.0-0 Nf6 8.h3 0-0 9.d3 Nh5 10.Nd5 Ne7 11.c4; 6.Nd5 Nf6 7.Bb2 d6 8.c4 Ne4 9.Qc2 Nf6 10.Nf6 gf6 11.cb5; 6.h3 Nf6 7.Bb2 Bd6 8.Bd3 0-0 9.0-0 Nd4 10.Nd4 ed4 11.Ne2; 6.g3 Nf6 7.Bb2 Bd6 8.Bd3 0-0 9.0-0 Re8 10.Re1 Nd4 11.Nd5) 6...Nf6 7.0-0 Bd6 8.Bb2 0-0 9.Re1 h6 10.Nd5 Re8 11.g3; D2) 5...Bd6 6.a4 Nf6 7.ab5 Nb4 8.Ba3 0-0 9.Bc4 Bb7 10.0-0 Qe7 11.d4; D3) 5...Nf6 6.d4 (6.Bb2 Bb7 7.Bd3 Bd6 8.0-0 0-0 9.Nd5 Nd5 10.ed5 Ne7 11.Be5; 6.Bd3 Be7 7.0-0 0-0 8.Re1 d6 9.Bb2 Be6 10.h3 h6 11.Be2; 6.Be2 Bd6 7.d4 ed4 8.Nd4 0-0 9.0-0 Qe7 10.Nf5 Qe5 11.Nd6; 6.h3 d5 7.ed5 Nd5 8.Bd3 f5 9.Bf1 Be7 10.Bb2 e4 11.Nd5) 6...ed4 7.Nd4 Bd6 8.f4 Be7 9.Be2 Nd4 10.Qd4 d6 11.a4.

4.Nf3 d6 5.a4 (5.d4 A) 5...Nd7 6.a4 (6.e4 Ngf6 7.a4 Bb7 8.ab5 ab5 9.Ra8 Ba8 10.Bb5 Ne4 11.Ne4; 6.g3 Ngf6 7.Bg2 e4 8.Nh4 d5 9.0-0 Bd6 10.Nf5 0-0 11.Nd6) 6...ba4 7.Ra4 Ngf6 8.e4 Be7 9.Bd3 ed4 10.Nd4 0-0 11.0-0; B) 5...ed4 6.Nd4 c5 7.Nf3 Nf6 8.bc5 Nc6 9.e4 Be6 10.Be2 dc5 11.0-0) 5...ba4 (5...Nc6 6.ab5 Nb4 7.Ba3 c5 8.bc6 Nc6 9.e4 Nf6 10.Bc4 Be7 11.0-0) 6.Ra4 (6.e3 Nf6 7.Ra4 Nbd7 8.h4 Bb7 9.Bb2 d5 10.b5 ab5 11.Ra8; 6.e4 Nf6 7.Ra4 Bb7 8.Bd3 Be7 9.Bb2 Nc6 10.0-0 0-0 11.Nd5) 6...Bb7 (6...Nf6 7.e4 Bb7 8.Bd3 Nc6 9.0-0 Be7 10.Bb2 0-0 11.Re1) 7.e3 e4 (7...Nd7 8.Bb2= (8.Be2 Ngf6 9.Bb2 Be7 10.Qa1 c5 11.bc5) 8...Ngf6 9.Be2 Be7 10.0-0 0-0 11.Ra3; 7...Nf6 8.Bb2 Nc6 9.e4 a5 10.ba5 Ra5 11.Ra5) 8.Nd4 g6 (8...Nf6 9.Bb2= Be7 10.Nf5 0-0 11.g4) 9.d3 (9.Bb2 Bg7+/– (9...Nf6 10.b5 Bg7 11.Qa1) 10.b5 Nf6 11.Qa1) 9...Bg7 (9...ed3 A) worse is 10.Bd3 Bg2 11.Be4+= 0.60 (11.Rg1 Bb7+=); B) 10.Qd3 Bg7 (10...Nf6 11.Qc4) 11.Be2+/– 1.05 (11.Bb2+=); 9...Nc6 10.de4 Bg7 11.b5) 10.de4 (better is 10.Ne4 Nf6 (10...Nc6 11.Be2) 11.Be2+/– (11.Nf6 Bf6 12.Nb3+/–)) 10...Be4?? (better is 10...c5 11.bc5 dc5+=; 10...Nf6 11.Bd3) 11.Ne4+- Qd7 12.Bb5! ab5 (12...c6 13.Be2 Nf6 14.Nf6 Bf6+-) 13.Ra8 Qc6 14.Nc6 Nf6 15.Nd6! Kd7 16.Nb7 Kc6 17.Na5 Kb6 18.Qd4 (18.Qd4 c5 19.Qc5) 1–0. pierret@chesscube.com – jayson2820@chesscube.com, ChessCube Game, 2011.

4.g3 Nf6 5.d3 h6 6.Bg2 c6 7.Ne4 Ne4 8.Be4 Be7 9.h4 0-0 10.Bb2 d6 11.e3 d5 12.Bf3 Bd6 13.Ne2 Bb7 14.d4 e4–/+ 15.Bg4 Nd7 16.Nf4 Bf4 17.gf4=+ Nf6 18.Bh5 a5 19.Be2 ab4 20.ab4 Ra1 21.Qa1 Qd6 22.c3 Ra8 23.Qd1 Ra2 24.Bc1 Ra1 25.f3 ef3 26.Bf3 Ne4 27.Be4 de4 28.Rh2 Qg6–+ 29.Kf2 Bc8 30.Rg2 Qf6 31.Kg3 Qf5 32.Kf2 Qh3 33.h5 Qf3?? 34.Qf3=+ ef3 35.Kf3?? Rc1–+ 36.Ke4 Rc3 37.d5 cd5 38.Kd5 Re3 39.Kd4 Rh3 40.Rf2 Rh5 41.Kc3 Rf5 42.Kd4 g5 43.Ke4 Rf4 44.Rf4 gf4 45.Kf4 f5 46.Ke5 h5 47.Kf4 Kg7 48.Kg5 Kf7 49.Kh5 Ke6 (50.Kg5 Kd5–+) 0–1. valerypavlovich (2120) – iboyd (1950), net–chess.com, 2006.

4.Bb2 Qf6 5.Nf3 ab4 6.Be5+- Qc6 7.Nd4 Qc5? 8.ab4 Qe5 9.Ra8 c5 10.f4 Qc7 11.Nb5 Qb7 12.Ra7 Qc6 13.Rc7 Qa6 14.N5c3 Qd6 15.Rc8 Ke7 16.bc5 Qe6 17.Rb8 Nf6 18.Bb5 h6 19.0-0 h5 20.e4! Ne4 21.Ne4 Qe4 22.Re1 (22...Kf6 23.Re4 g6 24.Qf3 Bc5 25.Kf1 Bd4 26.Rh8 Bb2 27.Nc3 Kg7 28.Ree8 Ba3 29.Reg8 Kf6 30.Qe4 Bc5 31.Nd5#) 1–0. marekt – silkyboy, gameknot.com, 2001.

4.Bb2 Nf6!? +=.

4.c3 a4 5.Bb2 d6 6.Bb5 Bd7 7.Qf3 Bb5 8.Qa8 Nd7 9.Qf3 Ngf6 10.Ne2 Be7 11.0-0 e4 12.Qg3 0-0 13.Re1 Nh5 14.Qh3 g6 15.Ng3 d5 16.Nh5 f6 17.Qe6 Kh8 18.Nf4 c6 19.Qh3 Ne5 20.c4 Ba6 21.Be5 Kg7 22.Ne6 Kh8 23.Nd8 Rd8 24.Qe6 fe5 25.Qe5 Kg8 26.Qe7 Rc8 27.b5 cb5 28.cb5 Bb5 29.Qe6 Kg7 30.Qc8 Bc4 31.Nc3 Kh6 32.h4 Bb3 33.g4 Bc2 34.Qf8# 1–0. ekosachro (2160) – samantho (1815), net–chess.com, 2014. (=1.a3 e5 2.b4 b5)

4.Bb2 a5!? +=.

4.Bb2 Bd6 5.Nf3+/– Qe7 6.c4 bc4 7.Bc4+/– a5 8.b5 Ra7? 9.b6 Rb7+/– 10.Bc3 Rb6 11.Ba5 Ra6 12.Ba6+/– Na6 13.d4 e4 14.Nfd2 Nf6 15.Nc3 c5 16.dc5?? Nc5= 17.0-0 Ba6=+ 18.Ne2 Qe5 19.g3= Nd3?? 20.Bc3+- Qh5? 21.Bb4?? Be5?? 22.Nf4= Qf5?? 23.Nd3+/– Bd3?? 24.Qa4+- Kd8 25.Qa8 Kc7 26.Rfc1 Kb6 27.Qa5 Kb7+- 28.Rc7!! Bc7 29.Qf5 Re8 30.Bc3 Bd8 31.Bf6 gf6 32.Qd7 Bc7 33.Qe8 (33...Bb5 34.Qb5 Kc8 35.Qe8 Kb7 36.Rb1 Bb6 37.Qd8 Kc6 38.Rb6 Kc5 39.Qd4#) 1–0. Trkn – bead, itsyourturn.com, 2001.

4.Bb2 f6 5.d4 a5 6.de5 fe5 7.Qh5+- g6?? 8.Qe5 Ne7 9.Qh8 Nf5 10.g4 Nd6 11.Bf6 Qb6 12.Bg7 Kf7 13.Qf8 Ke6 14.Qf6 Kd5 1–0. Double Wood – JimDog, ChessWorld.net, 2005.

4.Nf3 e4 5.Nd4 a5 +=.

4.Bb5 a5 5.Nf3 ab4 +=.

4.d3 Nc6!? –/+.

4.d3 g6 5.Bb2 Bg7 6.Nf3 Nf6 7.Be5 0-0 8.Bb2 d5 9.e5+/– Nfd7 10.d4 Nb6 11.Nbd2 N8d7 12.Be2 Na4 13.Rb1 Ndb6 14.c3 Nb2 15.Rb2 Nc4 16.Nc4 bc4 17.0-0 Bc8 18.h3 Be6 19.Qa4 Bd7 20.Qa5 Bf5 21.Qa4 h5 22.Qa6 Bc8 23.Qc6 Be6 24.Nd2 a5 25.b5 a4 26.f4 Bd7?? 27.Qd5+- Rb8 28.Qc4 c5 29.Qc5 Bf5 30.Nc4 Rc8 31.Qb4 Ra8 32.b6 Rb8 33.Qa4 Ra8 34.Qb4 Rb8 35.a4 Re8 36.a5 Qh4 37.Nd6 Rf8 38.a6 Ra8 39.b7 Ra7 40.Nf5 gf5 41.b8Q Ra6 42.Q8b7 Rg6 43.Kh1 Bh6 44.d5 Kh7 45.e6 Bg7 46.e7 Re8 47.Bd3 Rf6 48.d6 Qg3 49.Bb5 Rg8 50.e8Q Rd6 51.Qg8! Kg8 52.Qd6 Kh7 53.Qf7 Qc3 54.Qdg6 (54...Kh8 55.Qh5 Bh6 56.Qh6#) 1–0. pillsbury (2075) – rsuzukovich (1815), net–chess.com, 2007.

4.d3 h6 5.Nf3 d6 6.Be2 a6 7.Bb2 Nd7 8.Nbd2 Ngf6 9.0-0 Rb8 10.Ne1 Be7 11.f4 0-0 12.f5 d5=+ 13.Bf3 d4 14.Nb3 c5 15.c3 ½–½. Satka,Martin – Heidfeld,Christel, Brandenburg op Seniors, 2004.

4.Nf3 a6=.

4.Bb5 a5 5.ba5 Bc5 6.Nf3 +/–.

4.Nc3 a6 +/–.

5.Bc4 a5 6.ba5 Bc5 7.Qe2 +/–.

5.Bc4 a5!? 6.Bb2 Qg6 +/–.

5.Bc4 a6? 6.Bb2 c5 7.c3?? Qg6+/– 8.Qf3 Nf6 9.d3 d6 10.Nh3 h6 11.0-0 Bb7 12.Nd2 Bc8? 13.Bb3 Be7 14.Ba4 Bd7+/– 15.Bd7 Nbd7 16.Qe2 Nh5 17.f4 ef4+/– 18.Nf4 Ndf6?? 19.Ng6+- fg6 20.g4 (20...0-0 21.Nc4+-) 1–0. pillsbury (1935) – nwishn (2035), net–chess.com, 2007.

5.Bc4 Bb7 6.d3 Bd6 7.Nh3 h6 8.Be3 Qg6 9.Qf3 f6 10.Nc3 Ne7 11.g3 Ba6 12.b5 cb5 13.Bd5 Nec6 14.0-0+/– b4 15.Bc6?? Nc6?? 16.Nd5 Qf7?? 17.Nc7?? Bc7–+ 18.ab4 Nb4 19.c3? Bd3–+ (20.cb4 Bf1 21.Rf1 Bb6–+) 0–1. dmakaveli – gillylara, net–chess.com, 2001.

5.Bd3 +/–.

3.Bb2 Bb7 4.d3 (4.Be5!? Nc6 5.Bg3+=) 4...d6 5.e4 Nf6 6.c4 (6.Nf3 Be7=) 6...Be7 7.Nf3 0-0 8.Nbd2 Nbd7 9.Be2 Re8 10.0-0 Bf8 11.Qc2 h6 12.Nb3 Nh7 (12...a6 13.Nbd2+=) 13.d4 (better is 13.b5!?+=) 13...ed4= 14.Nfd4 Be4 (< 14...Re4 15.Bf3 Ng5 16.Be4 Be4 17.Qe2+/–) 15.Bd3 Bd3 16.Qd3 Ne5 17.Qc3 d5 18.c5 (18.cd5 Nf6=+) 18...Nf6 19.cb6 (19.c6 Ne4 20.Qc2 Qf6–/+) 19...cb6 20.Rad1 Rc8 21.Qg3 Ne4 22.Qh3 Nc4 23.Bc1 Qf6 24.Nf3 (24.Qd7 Nc3 25.Rde1 Be7–/+) 24...Nc3 25.Rde1 Ne2?? (25...a5 26.ba5 ba5 27.Nfd4–+) 26.Kh1?? (better is 26.Re2 Re2 27.Qc8+-) 26...Nc1 27.Rc1 Qe6 28.g4 Na3 29.Nbd4 Qf6 30.Rg1? Rc1–+ 31.Rc1 Nc4 32.g5 hg5 33.Rg1 Bb4 34.Rg5 g6 35.Rg4? Ne5 36.Rg3 Nf3 37.Nf3 d4 38.Qh6 Bf8 39.Qh3 d3 40.Rg4 Re2 41.Ng5 Qc6 42.Re4 Qc1 43.Kg2 Qg5 44.Rg4 Qd5 45.Kg3 Bd6 (46.f4 Re3 47.Kf2 Rh3 48.Rg5 Rh2 49.Rg2 Qg2 50.Ke3 Bc5 51.Kd3 Qc2) 0–1. willow27 – yulio, ChessWorld.net, 2005.

3.Bb2 Nc6 4.b5 Nd4 5.e3 Ne6 6.Be5 Nf6 7.Nf3 d6 8.Bb2 Bb7 9.a4 Qd7 (9...Be7 10.Bd3+/-) 10.a5 (10.Bf6 gf6 11.a5 Ng5+-) 10...0-0-0 (10...Be7 11.Nc3+/-) 11.a6 (better 11.Bf6!? gf6 12.d4 Re8+-) 11...Ba8 12.Be2 h6 13.0-0 Be7 14.Nd4 Nd4 15.Bd4 g5? (better 15...Qf5!?+/-) 16.Bf3 d5 17.Bf6 Bf6 18.Bg4 Ba1 19.Bd7 Rd7 20.c3 d4 21.cd4 Be4 (21...c5 22.Qb3+-) 22.Na3 (22.d3 Ba8+-) 22...Bb2 23.Nc4 Bd3 (23...Bd4 24.ed4 Rd4 25.Ne5+-) 24.Nb2 (24.Qf3!? Re7 25.Nb2 Bf1 26.Qb7 Kd7 27.Kf1 Rc8+-) 24...Bf1 25.Kf1 Rhd8 26.Qc2 c5 (26...Rd5 27.Qc6 R8d6 28.Qa8 Kd7 29.Nc4+-) 27.bc6 Rc7 28.Nd3 (28.Qf5 Kb8 29.Qf6 Rdc8+-) 28...f6 (28...Rd6 29.Ne5 Re7 30.Qf5 Kb8 31.Nf7 Rc6 32.Nh6+-) 29.Nb4 Rd6 30.d5 Kd8 (30...Rg7 31.Qf5 Kc7 32.d4+-) 31.d4 (31.Qg6 Kc8+-) 31...h5 (31...Rg7+-) 32.Qg6 Re7 33.Qg8 Re8 34.Qf7 Re7 35.Qf8 Re8 36.Qd6 Kc8 37.Qd7 Kb8 38.Qb7 1-0. black_bishop_88 (2730) - MatveyE2007 (1790), Hourly SuperBlitz Arena, 2020. (=1.a3 e5 2.b4 b6)

3.Bb2 d6 (--> 1.b4 e5 2.Bb2 d6 3.a3 b6).

3.Bb2 Qe7 4.e4 Bb7 5.d3 d6 6.Be2 (6.Nf3 Nd7+=) 6...Nc6 (6...Qg5 7.Bf3=) 7.Nf3+= Qf6 8.Nbd2 Nge7 9.Nf1 (9.0-0 a6+=) 9...Ng6 10.Ne3 Nf4 11.Qd2 Qg6 12.g3 Ne2 13.Qe2 Ne7 14.0-0-0 (14.Nh4 Qe6=) 14...Ba6 (14...b5 15.Bc3=+) 15.Nh4 (15.Nd2 Rc8=) 15...Qg5 (15...Qe4! 16.c4 Qc6–/+) 16.Kb1 (16.Nhg2 Qg6=) 16...c5 17.Nhf5 Nf5 18.Nf5 cb4 19.ab4 g6 20.h4 (20.f4 Qd8 21.Ne3 Bg7=) 20...Qf6 (20...Qd8 21.Ne3=) 21.Ne3 Bb5 (21...Qe6 22.f4=) 22.Nd5 Qd8 23.f4 Bg7 24.fe5 (24.h5 a5+=) 24...Be5 (24...de5 25.h5 h6 26.Qf2+=) 25.c4 (25.Rdf1 Bc6+=) 25...Bd7 26.Be5 de5 27.Rhf1 (27.d4 ed4 28.Rd4+/–) 27...h5? (27...Bh3 28.Rf2 0-0 29.g4+-) 28.Nf6 (better is 28.Qb2!? Qb8 29.Nf6 Kd8 30.Nd7 Kd7 31.Rf7 Kd8 32.Rf6+-) 28...Kf8+= 29.Qf3 Qe7 30.Nd7 Qd7 31.Qf6 Qc7?? 32.Qh8+- Ke7 33.Qa8 a5+- 34.Qd5 Kf8 35.Rf7! Qf7 36.Qf7 Kf7 37.ba5 ba5 38.Kc2 1–0. carrafurca (2255) – grahamtrue (2120), net–chess.com, 2009.

3.Bb2 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 b6).

3.c4 a5 4.b5 c6 (4...Nf6 5.Bb2=) 5.Bb2 f6 (5...d6 6.d4 ed4 7.Bd4+=) 6.e3 (6.d4 ed4 7.Bd4 Bb7+=) 6...d5= 7.bc6 (7.cd5 cd5 8.d4 e4+=) 7...Nc6 8.cd5 Qd5 9.Nc3 Qd8 10.Bb5 Qd6 (10...Bd7 11.Nf3+=) 11.Nf3 g5? (better is 11...Bd7!?+=) 12.d4+- ed4?? (better is 12...Bd7 13.de5 Ne5 14.Ne5 fe5 15.Qh5 Qg6 16.Qg6 hg6+-) 13.Nd4 (13.ed4?! Kd8+/–) 13...h5 (13...Bd7 14.Qh5 Kd8 15.Nc6 Kc7+-) 14.Bc6 (14.Bc6 Bd7 15.Ba8+-) 1–0. Wall,Bill – Seiko, internet, 2002.

3.c4 c5 4.Qb3 h6 (4...Nc6 5.b5 Nd4 6.Qb2=) 5.Bb2 Nc6 6.e3 (6.b5 Na5 7.Qc2 d6=) 6...Bb7 7.b5 Na5 8.Qc2 Qg5 (8...d5 9.cd5 Qd5 10.Nf3=) 9.e4 Nf6 10.d3 Nh5 (better is 10...d6!?+=) 11.Nf3+/– Qd8 12.Be5 f6 13.Bc3 Be7 14.Ba5 ba5 15.Nc3 Nf4 16.Nd5 Nd5 17.ed5 0-0 18.Be2 a6 19.a4 Bd6 20.0-0 g5 21.d4 f5 22.dc5 Bc5 23.Bd3 Qf6 24.Rab1 d6 25.Rfe1 Bc8 26.Qb2 Bd7 (26...Qb2!? 27.Rb2 ab5 28.cb5+/– (28.Rb5?! Bd7+=)) 27.Qf6 Rf6 28.Re7 Bc8?? (28...Rf7 29.Re2+-) 29.Rbe1 (better is 29.b6+-) 29...Ra7 30.Re8 Rf8 31.Kf1 Bd7 32.R8e7 ab5 33.cb5 Rf7 34.Rf7 Kf7 35.Nd2 Bb4 36.Re2 Kf6 37.Nb3 g4 (37...Rc7!?+/–) 38.Nd4+- h5 39.Nc6 Rb7 40.Nb4 ab4 41.Rb2 Ke5 42.Rb4 Kd5 43.g3 (43.a5!? Kc5 44.a6 Rb8+-) 43...Be6 (43...Kc5 44.Rf4+-) 44.Rf4 Ke5 45.Ke2 Bd5? (45...Bd7+-) 46.Rf5 Kd4 47.Rh5 Bb3 (47...Ra7 48.Rf5+-) 48.Rh4 Kc3 49.Rg4 Re7 (49...d5 50.Bf5 Re7 51.Kf1 d4+-) 50.Re4 (50.Re4 Rh7 51.b6+-) 1–0. tightfist (2235) – kecker (2240), net–chess.com, 2013.

3.c4 Nf6 4.Bb2=.

3.e3 Bb7 4.Nf3 (better is 4.Bb2 a5 5.b5=) 4...Nc6 (4...e4 5.Nd4=) 5.Bb2 (5.b5!? Nb8 6.Ne5+/–) 5...d6 (5...e4 6.Nd4=) 6.c4 (6.Be2 a6=) 6...Nf6 (6...e4 7.Nd4=) 7.d4+= ed4 8.Nd4 (8.ed4 Qe7 9.Be2 d5+/–) 8...Be7 (8...a5 9.b5 Nd4 10.Bd4+=) 9.Nc6 Bc6 10.Be2 (10.b5 Bb7+=) 10...0-0 11.Nd2 (11.0-0 Qc8+=) 11...Qd7 (11...Bg2!? 12.Rg1 Bb7=+) 12.Bf3 (12.0-0 a6=) 12...Rae8 (12...Bf3 13.Qf3 a6 14.0-0+=) 13.Bc6 (13.0-0 a6+=) 13...Qc6 14.Qf3 (14.0-0 a6=) 14...Qa8 (14...Qa4 15.0-0=) 15.Qa8+= Ra8 16.0-0 (16.Rd1 Rfe8+=) 16...c6 17.Rfd1 Rad8 18.Nb3 Rfe8 19.Rd3 d5+= 20.cd5 Nd5 21.Rad1 Nf6 22.Rd8 Rd8 23.Rd8 Bd8 24.Nd4 c5 25.Nc6 Bc7 26.Na7 Nd7 27.Nb5 Bb8 28.bc5 bc5 29.Kf1 Nb6 30.Ke2 f6 31.g3 Kf7 32.Kd3 Ke6 33.f3 Na4 34.Ba1 g6 35.Nc3 Nb6 36.Ne4 Nd7 37.Kc4 Bd6 38.Nd6 Kd6 39.e4 h5 40.f4 Kc6 41.a4 f5 42.e5 Nb6 43.Kb3 Nd5 44.Bc3 c4 45.Kc4 Ne3 (46.Kd4 Nf1+-). thedesertfox (1920) – mic (2240), net–chess.com, 2005.

4.e3 Bb7 5.Qg4 (5.Nf3 Qf6=) 5...Nf6 6.Qg3 (6.Qg5 0-0=) 6...0-0=+ 7.f3 (< 7.Be5 Nh5 8.Qh3 Be5–/+) 7...Nc6 (7...a5 8.b5=+ (8.Be5? Nh5 9.Qh3 Be5–+)) 8.Bc4 (8.b5 Na5=+) 8...e4 (8...a6 9.Ne2=+) 9.f4 (better is 9.Qg5 Ne8 10.Qd8 Nd8 11.Bb5=) 9...Ne7?? (better is 9...Be7=) 10.Bf6+- Nf5 11.Bd8 Ng3 12.hg3 Rad8 13.Nc3 Kh8 14.g4 Be7 15.Bd5 Bd5 16.Nd5 Bd6 17.0-0-0 c6 18.Nc3 Rde8 19.Nge2 Bc7 20.Rh3 d5 21.Rdh1 h6 22.g5 Re6 23.gh6 g6 24.Nd4 Rf6 25.g4 Rd6 26.Kb2 a5 27.b5 c5 28.Nc6 Re8 29.Ne5 Rf6 30.Nd5 Be5 31.fe5 Rf2 32.R3h2 Rh2 33.Rh2 Re5 34.Nb6 Rg5 35.c4 Rg4 36.Nd7 Rg5 37.b6 (37...Rg3 38.b7 Rh3 39.b8Q Kh7 40.Qf8 Rh2 41.Nf6) 1–0. McCarthy,Mike – Mori,Roberto, IECG, 2000.

4.Nf3 Nc6 (4...Qe7!?=) 5.b5+/– Nce7 6.Ne5 Be5 7.Be5 Ng6?? (better is 7...f6 8.Bf4 Ng6+/–) 8.Bg7+- d5 9.e3 h6 10.Bh8 Nh8 11.c4 Nf6 12.d4 Be6 13.cd5 Bd5 (14.Nc3 Bb7+-). Kuroro Lucifer – xzara, ChessWorld.net, 2005.

4.Nc3 Nf6 5.Bd3 (5.d4 ed4 6.Qd4 Nc6=) 5...d5 (5...a5 6.b5=) 6.ed5 Nd5 7.Nge2 (7.Qf3!?=) 7...Nc3=+ 8.Nc3 Bd6 (better is 8...Bg2!? 9.Rg1 Bb7=+) 9.0-0= Qg5 (9...0-0 10.Qh5 g6 11.Qg4=) 10.Ne4 Qe7 (10...Qh4 11.Bb5 Nd7 12.Nd6 cd6 13.Re1+=) 11.Bb2 Nd7 12.Qg4 g6 13.Rae1 0-0-0 (13...a5 14.Nd6 cd6 15.b5+=) 14.Nd6+/– cd6 15.Re4?? (better is 15.f4!? f6 16.Bb5+/–) 15...f5 16.Rc4= Kb8 17.Qh4 Qh4 18.Rh4 h5 19.b5 Rc8 20.a4 Nc5=+ 21.Ra1 Nd3–+ 22.cd3 Rh7 23.a5 Rhc7 24.a6 Bd5 25.d4 Rc4 26.d3 Rc2 27.Rb1?? Ba2 (28.Re1 Rb2 29.de5 de5–+) 0–1. Lausten – chestnut_1, ChessWorld.net, 2009.

4.Qf3 Qf6 5.Nc3 Qf3 6.Nf3 d6 (6...Nf6 7.Bc4 Ne4 8.Ne5 Nc3 9.Nf7–/+ (< 9.Bf7 Ke7–+)) 7.Nb5 (7.Nd5 Bd5 8.ed5 a6+/–) 7...Kd7 (7...Na6 8.d3+=) 8.Bc4 (8.Nc3 Nf6 9.Bb5 Nc6+/–) 8...a6 (8...Be4 9.Ng5 d5 10.Nf7 dc4 11.Nh8=) 9.Nc3+/– f6 (9...f5 10.Ng5 fe4 11.Nf7+- (11.Nce4?! h6 12.Nf7 Rh7=; 11.Nge4?! Ne7=)) 10.d3 (10.d4 Ne7+/–) 10...Nc6 11.Bd5 (11.0-0 Nge7+/–) 11...Nge7+= 12.Bc4 Nd8 (12...Ng8!?=) 13.0-0+= Ne6. whaigh (1950) – eweram (1800), net–chess.com, 2005.

4.Qf3 Nf6 5.Nc3=.

4.Nf3 Be4 5.Ne5 Qe7=.

3.Bb2 Qe7 (--> 1.b4 e5 2.Bb2 Qe7 3.a3 c5).

3.Bb2 Qf6 (---> 1.b4 e5 2.Bb2 Qf6 3.a3 c5).

3.Bb2 Nf6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 c5).

3.b5 a5 4.c4 (4.e4 d5 5.ed5 Nf6=) 4...a4 (4...d6 5.Nc3=) 5.Nc3 (5.d3 Nf6=) 5...d5 (5...d6 6.Nf3=) 6.Nd5 Nf6 7.Nf3 (7.Nc3 Bd6+=) 7...Bd6 (better is 7...Nd5!? 8.cd5 e4=+) 8.Nf6 Qf6 9.Bb2 (9.Qc2 Bf5 10.d3 0-0+=) 9...0-0 (9...Bf5 10.d3+=) 10.Qc2 (10.Qc1 Re8+=) 10...Bf5= 11.e4 Bg4 12.Qd3 Rd8 (12...Nd7 13.Qe3=) 13.0-0-0 (13.Ne5!? Bc8 14.Qg3+=) 13...Nd7 14.Be2 Nb6 (14...Nf8 15.h3 Bd7 16.g3=) 15.h3 Be6 16.Rhg1 (better is 16.Qc3=) 16...Bc4 17.Qe3 Be2 18.Qe2 c4 19.d4 Qh6 20.Kb1 Rac8 21.de5+= Be7 22.Rd8 Bd8 23.Rd1 c3 24.Ba1?? c2 25.Qc2+= f5?? 26.Qa2 Nc4?? 27.ef5 Bb6?? 28.e6 Bf2?? 29.Qf2 Na3 30.Ka2 Rc2 31.Qc2! g5 32.Ka3 (32...Qf8 33.Ka4 Qa8 34.Kb3 Qa1 35.Qc8 Kg7 36.Rd7 Kh6 37.Qf8 Qg7 38.Qg7 Kh5 39.Qg5; 32.Rd8 Qf8 33.Qc3 Qd8 34.Qg7) 1–0. Matthias – Seeigel, mySchach.de, 2004.

3.c3 a6 4.bc5 Bc5 5.d4 ed4 6.cd4 Bb6 7.e3 Nf6 8.Nc3 Qc7 9.Bd2 0-0 10.Bd3 d5 11.Nge2 Qd8 12.0-0 Nc6 13.Qb3 Attacking the isolated pawn on d5 13...Bc7 14.Rfc1 Re8 15.g3 Bg4 16.Na4 (16.Rab1 Qd7=) 16...Rb8 (16...Be2 17.Be2 Nd4 18.ed4 Re2 19.Be3=) 17.Bc3 Ne4 18.Nc5 The backward pawn on b7 becomes a target 18...Qf6 (worse is 18...Nc3 19.Nc3 (worse is 19.Rc3 Be2 20.Be2 Nd4 21.ed4 Re2–/+; 19.Qc3?! Be2 20.Be2 Bb6+=) 19...Bf3 20.Rab1+/–) 19.Be4 de4 20.Qd1 Bd6 21.Rab1 Qf3 22.Rc2 Bh3 23.Nf4 Bf4 24.Qf3 ef3 25.gf4 Bf5 26.Rcb2 Bb1 27.Rb1 Ne7 28.h3 Nd5 29.Be1 h5 30.h4 Ra8 31.Kh2 b6 32.Nd3 Re6 33.Ne5 Rae8 34.f5 Rf6 35.Rb3 (35.Kg3!?–/+) 35...Rf5–+ 36.e4 Rfe5 (better is 36...f6!? 37.ef5 fe5 38.de5 Re5–/+) 37.de5–/+ Nf4 (37...Re5?! 38.ed5 Re1 39.Rb6=) 38.Bd2 Ng6 39.Rb6 Re5 40.Rb4 Nh4 41.Kg3 Ng6 42.Kf3 f5 43.ef5 Rf5 44.Kg3 Rd5 45.Rb6 Kh7 46.Bc1 Rd3 47.Kg2 Nh4 48.Kh2 Nf3 49.Kg2 Ne1 50.Kf1 Nc2 51.Kg2 Rd1 52.Bb2 Ne1 53.Kh2 Rd2 54.Kg1 Nf3 55.Kg2 Nh4 56.Kg1 Rc2 57.Rb7 Nf5 58.Kg2 Rc6 59.Be5 Kh6 60.Rf7 Kg5 61.Rd7 (61.Bg7? Kg6 (61...Ng7?! 62.Rg7 Kh4 63.Rg3=) 62.Rf5 Kf5–+) 61...g6 62.Kh3 Nh6 63.Bg7 Rc4 64.Rd6 Nf5 65.Bf6 Kf4 66.Ra6 Kf3 67.Rb6 Rg4 68.Rb2 Ra4 69.Rb3 Kf2 70.Bd8 Re4 71.Kh2 ½–½. marekt – jwjansen, internet, 2014.

3.c3 Nc6 4.Bb2 d5 5.d3 Be6 6.Nf3 White gets the initiative 6...Bd6 7.bc5 Bc5 8.d4 e4 (8...Qb6 9.Qc2 Bd6 10.e3=+) 9.dc5= ef3 10.ef3 Nf6 11.Nd2 (better 11.Bb5=) 11...d4 (better 11...Nd7!?=) 12.Nc4 (12.cd4 Qa5 13.Qe2 0-0-0+/-) 12...dc3 13.Nd6 Kf8 14.Bc3 b6 (14...Qe7 15.Be2+/-) 15.Bb5 Bd5 (15...Ne7 16.Bd4+/-) 16.0-0 bc5 17.Nb7 Qc7 18.Bf6 Qb7 (18...Nd4 19.Nc5 Nf3 20.gf3 Qc5+-) 19.Qd5 Qb5 20.Rab1 Qa6 21.Qc5 Kg8 (21...Ne7 22.Qe7 Kg8+-) 22.Qg5 g6 23.Qh6 (23.Qh6 Qf1 24.Kf1 Rd8 25.Qg7) 1-0. b4_player – Remaine, internet, 2020.

3.c3 d5 4.bc5 Bc5 5.d4 ed4 6.cd4 Bd6 7.Nf3 Ne7 8.e3 0-0 9.Bd3 Bg4 10.h3 Bh5 11.Nbd2 Nd7 12.Qb3 Nb6 13.a4 a5 14.0-0 Bb4 15.Ba3 Nc6 16.Rfb1 Rc8 17.Bf5 Rc7 18.Ne5 Ne5 19.Bb4 (19.de5 Rc3 20.Qb2 Na4 21.Bb4 Nb2 22.Bc3 Nc4 23.Nc4 dc4 24.Rb7 Bg6 25.Bg6 A) 25...fg6 26.e6 (26.Ba5 Qd5 27.Ra7 Qe5=+) 26...Rf6 27.e7+- (< 27.Ra5 g5+-; 27.Ba5?! Qd5 28.e7 Kf7+=; < 27.Bf6 gf6 28.Rab1 Kf8+-); B) 25...hg6 26.Ra5 Qd1 27.Kh2 Qc2=) 19...ab4 20.de5 Qe7 21.Qb2 Rd8 22.g4 Bg6 23.Nf3 Nc4 24.Qb4 Qe8 25.Bg6+= fg6 26.a5 Ne5 27.Ne5 Qe5 28.Ra2 Rcd7 29.Qd4 Qe7 30.Rc2 Qf7 31.Rbc1 Rf8 32.f4 g5 33.f5 Qe7 34.Kg2 Rfd8 35.Rc8 Kf7 36.Rd8 Rd8 37.Rb1 Qc7 38.Qb6 Rd7 39.Qc7 Rc7 40.Rb5 Rd7 41.Rb6 Rc7 42.Kf3 Kf8 43.Rb5 Rd7 44.Ke2 g6 45.fg6 hg6 46.Kd3 Kf7 47.Kd4 Ke6 48.Rb6 Kf7 49.Ke5 Kf8 50.Kf6 Re7 51.Rb3 Rc7 52.Rb5 Ke8 53.Rd5 Rh7 54.Rb5 Rh3 55.Rb7 Rf3 56.Kg5 Re3 57.a6 Re5 58.Kf6 Rc5 59.a7 Rc6 60.Kg7 Ra6 61.g5 Kd8 62.Rb8 Kc7 63.a8Q Ra8 64.Ra8 Kb7 65.Ra1 Kc6 66.Kg6 Kd5 67.Kf7 Ke5 68.g6 Kd4 69.g7 Ke5 70.g8Q 1–0. Klaus Behrmann – FABOLOUS, ChessWorld.net, 2003.

3.c3 Be7 4.Nf3 (4.bc5 Bc5 5.d4 ed4 6.cd4 Be7=) 4...Bf6 (4...e4 5.Ng1+=) 5.e3 (5.bc5 e4 6.Nd4 Na6+=) 5...cb4 (5...e4 6.Ng1 cb4 7.ab4+=) 6.ab4= d6 7.Be2 Bd7 8.0-0 e4 9.Nd4 Bd4 10.cd4 a6 11.d3 Nc6 (11...d5!?+=) 12.de4+/– Nb4 13.Nc3 h5 (13...Nc6 14.Ba3+-) 14.Nd5 (better is 14.Ba3!? a5 15.Nb5+- (15.Bh5?! Rc8 16.Bb4 ab4+/–)) 14...Nd5+/– 15.ed5 h4 16.e4 h3 17.g3 Nf6 18.Re1 Ne4? (better is 18...0-0 19.Bg5 Re8+-) 19.Bf3?? (better is 19.Bd3+-) 19...f5= 20.Be4 fe4 21.Re4 Kf8 22.Qf3 Kg8 23.Bf4 Bf5 (23...Qf6!? 24.Qa3 Rh5 25.Bd6 Rd5=) 24.Ree1+/– Qf6 25.Be3 (25.Bd6 b5 26.Ra5+/–) 25...g6?? (25...Rf8 26.Bf4+=) 26.Bf4 (better is 26.g4 Rh4 27.gf5 Qf5 28.Qf5 gf5 29.Reb1+-) 26...Qd4 27.Bd6 Rd8 (better is 27...Bg4!? 28.Qb3 Rh5=) 28.Be5+/– Qd5 29.Qd5 Rd5 30.Bh8 Kh8 31.Rac1 (31.Re8 Kg7 32.Re7 Kh6 33.Rb7 Rd2+/–) 31...Bd7 (31...Rd7 32.f4+=) 32.f4 (better is 32.Rc7!?+/–) 32...Rd2= 33.Kh1?? (better is 33.Rc7 Rg2 34.Kh1=) 33...Bc6–+ 34.Kg1? (better is 34.Rc6 bc6 35.Ra1–+) 34...Rg2 35.Kf1 (35.Kh1 Bf3 36.Rf1 Rg3 37.Rf3 Rf3 38.Kg1 Rf4 39.Rc3–+) 35...Bb5 36.Re2 Be2 (better is 36...Re2 37.Kg1–+) 37.Ke1 Rh2 38.Rc8 Kh7 39.Rc7 Kh6 40.Rb7 (40.Rc8 Kh5 41.Rd8 Bf3 42.Rh8 Kg4–+) 40...Rg2 41.Rb6 (41.Rb8 h2 42.Rh8 Kg7 43.Rh4–+) 41...h2 42.Ra6 h1Q (42...Ba6 43.f5 h1Q) 43.Kd2 Ba6 0–1. pieeater – karlsdad, ChessWorld.net, 2012.

3.e4 cb4 4.ab4 Bb4 5.Nf3 Nc6 6.Bb5 Nge7 7.c3 Ba5 8.Bc6 dc6 9.Ne5= f6 10.Nc4 b5?? 11.Na5+- c5 12.Qh5 g6 13.Qh6 Kd7 14.0-0 Qf8 15.Qh3 Kd8 16.Qd3 Bd7 17.Qd6 Ng8 18.Qf8 Be8 19.Qg7 Bc6 20.Qh8 Be4 21.Qg8 Kc7 22.Qh7 Kd6 23.Re1 g5 24.Qe4 Rh8 25.Qe6 Kc7 26.Qe7 Kb6 27.Re6 (27.Qb7) 1–0. iboyd (1950) – ajeffries (1645), net–chess.com, 2006.

3.e4 d6 4.Nf3= Nc6 5.b5 Nd4 6.Bc4 Nf6 7.c3 Nf3 8.Qf3 (worse 8.gf3 Be7 9.Rg1 d5 10.ed5 0-0=+) 8...Be7 9.h3 (9.0-0 Be6 10.d3 0-0=) 9...0-0 10.d3 Be6 11.Nd2 d5 12.Bb3 c4 (12...de4 13.de4 Bb3 14.Nb3=+) 13.dc4= de4 14.Ne4 Nd7 15.Be3?? (better 15.0-0=) 15...f5-+ 16.c5? (better 16.Bc2-+) 16...Bb3 17.Nd6 (17.Nd2 e4 18.Qg3 Ba4-+) 17...Bd6 (17...f4 18.Nb7 fe3 19.Nd8 Rf3 20.gf3 ef2 21.Kf2 Bc5 22.Kg3 Rd8 23.Rhe1-+) 18.cd6 b6 (18...f4 19.Bc1 Nc5 20.0-0 Qd6 21.a4-+) 19.0-0 (19.Rb1 Bc2 20.Qd5 Kh8-+) 19...Rc8 (19...f4 20.Bc1 Nc5 21.a4-+) 20.Rfe1 (20.Rab1 Be6-+ (20...Rc3?! 21.Rb3 Rb3 22.Qd5 Kh8 23.Qb3=)) 20...f4 (20...Rc3?! 21.Bb6 Rf3 22.Bd8-+) 21.Bd2 Bc4 22.Qb7 (22.Rad1-+) 22...Rf6 23.Qa7 Rd6 24.Rad1 (24.Bf4 ef4 25.Rad1 Bd5-+) 24...Nc5 25.Bc1 (25.Re5 Rd7 26.Rc5 Ra7 27.Rc8 Qc8 28.Bf4 Ra3 29.Be5-+) 25…Rd1 (25...Rd1 26.Rd1 Qd1 27.Kh2 Qd8-+) 0-1. mordor1 (2090) - FraGer68 (2295), Rated Bullet game, lichess.org, 2015. (=1.a3 A00: Irregular Openings 1...c5 2.b4 e5)

3.Nf3 d6 4.bc5 (4.e4 Nf6=) 4...dc5 (better 4...e4 5.Ng1 dc5=) 5.Ne5 (5.e4=) 5...Qf6?? (better 5...Qd4 6.Nf7 Qa1 7.Nh8 Qb1–/+) 6.d4 (6.Bb2 Nc6 7.Nd3 Qd6+-) 6...Bf5 (6...cd4 7.Qd4 Nd7 8.Nf3+=) 7.c3 (7.e4 cd4 8.Qd4 Nd7+-) 7...b6 (7...Nc6!? 8.Nc6 Qc6+-) 8.Qa4 Nd7 (8...Bd7 9.Nd7 Nd7 10.dc5 Rd8 11.cb6 Qb6+-) 9.e4! Be6 (9...Be4 Theme: Deflection from d7 10.Qd7) 10.Bb5 Qe7 (10...Rd8+-) 11.d5 Bd5 (11...Bf5 12.Bf4 f6+-) 12.Bd7 (12.ed5?! Qe5 13.Be3 Rd8+= (13...Qd5?? 14.Bc6 Qe6 15.Ba8+-)) 12...Kd8 13.Nc6 (13.Nc6 Bc6 14.Bc6+-; better 13.Bf4!? Nf6 14.Bc6 Rc8 15.Bd5 Nd5+-) 1–0. kirklandlake (1785) – lontjr (1760), ChessWorld.net, 2017.

4.ab4 Bb4 5.Be5 d6?? 6.Bg7+- Nf6 7.Bh8 Ne4 8.c3 Qh4 9.g3 Ng3 10.fg3 Qe4 11.Nf3 Bg4 12.Bg2 Nc6 13.cb4 0-0-0 14.b5 Nb4 15.b6 a6 16.Bf6 Re8 17.Qc1 Nc2 18.Kd1 Qe2 19.Kc2 Kb8 20.Qf1 Bf5 21.Kc1 Rc8 22.Nc3 Qe6 23.Nd4 Rc3 24.dc3 Qe3 25.Kb2 Qd2 26.Kb3 (26...Be6 27.Ne6 fe6 28.Bg5 Qd5 29.Bd5 Kc8 30.Be6 Kb8 31.Qf8) 1–0. tonycally – Mengs, ChessWorld.net, 2004.

4.ab4 Bb4 5.Be5 Nf6 6.Nc3 0-0 7.Bf6 Qf6 8.Nd5 Qd4 9.Nb4 Qb4 10.Nf3 d5 11.e3 Bg4 12.Be2 Nc6 13.0-0 a5 14.c3 (14.h3 Bf3 15.Bf3 Qd6=) 14...Qd6 15.Qc2 (15.h3 Bf3 16.Bf3 Ne5=) 15...Bf3 16.Bf3 Ne5 17.Be2 Rfc8 18.d4 (18.Rfb1 b6+=) 18...Nc4= 19.Bd3 g6 20.h4 (20.Bc4 Rc4 21.Rfb1 b6=) 20...b5=+ 21.h5 b4 (21...a4 22.Qe2=+) 22.hg6 hg6 (22...fg6 23.Rfc1=) 23.Rfc1 Ne3 (23...bc3!? 24.Qc3 a4=) 24.fe3+= Rc3 25.Qd2 Rc1 26.Qc1 a4 27.Rb1 (27.Qd2 Qb8+=) 27...a3 (27...Kg7 28.Bb5+=) 28.Rb3+= Ra7 29.Qa1 f5 30.Be2 ½–½. labackna – smoothmovermovesagain, ChessWorld.net, 2006.

4.ab4 Bb4 5.Be5 Nf6 6.Nc3 Nc6 7.Bf6=.

4.ab4 Bb4 5.Nf3 d6 6.c3 Ba5 7.d4 –/+.

4.ab4 Nc6 5.b5+= Qb6!? 6.e3 d6+=.

4.ab4 Nc6 5.b5+= Nd4 6.e3+/– Nf5 7.Be5 Qe7 (7...d6 8.Bf4+/–) 8.Nf3 d6 9.Bb2 Nf6 10.Be2 Nd5 (10...Be6 11.0-0+-) 11.0-0 Nh4 (11...a6 12.ba6 ba6 13.Bb5 Kd8 14.Nc3+-) 12.c4 Nf3 13.Bf3 Nf6 14.d4 (14.Qa4 Qe6+-) 14...h6 15.Nc3 Nh7?? (15...Qc7 16.Qa4 Bd7+-) 16.Nd5 Qd7 (16...Qd8 17.b6 Rb8 18.Nc7 Ke7 19.ba7 Qc7 20.ab8R Qb8+-) 17.b6 a6 (17...Ng5 18.Nc7 Kd8 19.Na8 Nf3 20.Qf3+-) 18.Nc7 (18...Kd8 19.Na8+-) 1–0. Wall,Bill – Hummer, internet, 2003.

4.ab4 Nc6 5.b5 Nd4 6.e3 Nf5 7.Be5 Nf6 8.Nf3 d6 9.Bb2 Be7 10.c4 (10.Ra4 Nh6+-) 10...0-0 (10...d5 11.cd5 Qd5 12.Nc3+/-) 11.d4 b6 (11...d5 12.c5+/-) 12.Be2 (12.Bd3 d5+-) 12...Bb7 (12...d5 13.Nc3+/-) 13.Nbd2 d5 14.0-0 (14.Qc2 Nd6 15.c5 Qc7+-) 14...dc4+/- 15.Bc4 Nd6 16.Be2 a6? (better 16...Bd5!?+/-) 17.ba6+- Bf3 (17...Bd5 18.Bd3 Ra7 19.Qb1+-) 18.Nf3 (18.Bf3 Ra7+-) 18...b5 19.Ba3 (19.Qb3 Qb6+-) 19...Qb6? (19...Ra6 20.Bd6 Ra1 21.Qa1 Bd6 22.Bb5+-) 20.Bd6 (better 20.Bc5!? Qc7+-) 20...Bd6 21.Qb3 Ra6 22.Ra6 Qa6 23.Qb5 Qb5 24.Bb5 Rb8 25.Bc6 (25.Bd3 Rb3 26.Rd1 Rb2+-) 25...Rb2 26.d5 (26.g3 g6+-) 26...g6 27.Nd4 Rd2 (27...Bc5 28.g3+-) 28.Nb5 (better 28.h3!?+-) 28...Bc5 29.Nc7 (29.Nc3 Rd3 30.Na4 Ba3+/-) 29...Bd6 (29...Ng4 30.Na6 Ba7 31.h3 Nf2 A) 32.Rf2 Be3 33.Nb8 Bf2 (33...Rf2?! 34.Nd7-+) 34.Kf1 Bg3-+; B) 32.Kh2=) 30.Ne8 Ne8 31.Be8 Rd5 32.g3 Rd2 33.Rb1 Kg7 (better 33...Kf8!? 34.Bc6 Ke7+/-) 34.Rb7+- Kf8 35.Bf7 Kg7 (35...Be5 36.f4 Rb2 37.Rb2 (37.fe5 Rb7 38.Bd5 Rb1 39.Kg2 Rb2 40.Kg1 g5=+) 37...Bb2 38.Bd5+-) 36.Bd5 (36.Bc4 Kh8+-) 36...Kh6? (36...Kf6 37.Bc4 h6 38.Kg2+-) 37.e4 (37.Bg8 Kh5+-) 37...Be5 (37...Bc5 38.Rf7+-) 38.Rb3 (38.Bg8!? Bg7+-) 38...Bd4 39.Rf3 g5 40.Kg2 g4 41.Rf5 Kg6 (41...Be3 42.Bf7+-) 42.h3 (42.Bf7 Kh6+-) 42...h5? (better 42...gh3 43.Kh3 Rf2 44.Rf2 Bf2+/-) 43.hg4+- hg4 44.Bf7 (44.Bf7 Kh6 45.Be6+-) 1-0. danishguy (2020) - A_Kenyan (1940), Rated Bullet game, lichess.org, 2020.

4.ab4 d5 5.b5 Nd7=.

4.ab4 d5 5.e3 f6 6.b5 Bb4 7.Ra4=.

4.ab4 d5 5.Be5 Nc6 6.Bb2 Nb4 7.e3=.

4.ab4 d5 5.Be5 Nc6 6.Nf3 Ne5 7.Ne5= Qf6 8.d4 Bb4 9.c3 Bd6 10.Ra5 Ne7 11.Qa4 Nc6 12.Nc6 Bd7 13.Ra7 Ra7 14.Qa7 bc6 15.Qa8 Qd8=+ 16.Qd8 Kd8 17.e3 Bf5 18.Nd2 Kd7 19.c4 Rb8 20.cd5 cd5 21.Be2 Rb2–/+ 22.g4 Bg6 23.Nf3=+ Rb1 24.Bd1 Be4 25.Ke2 Ra1 26.g5 Ke6 27.h3 g6 28.h4 Ke7 29.Rg1 Ra2 30.Kf1 Ke6 31.Kg2 f6 32.Rh1 Kf5 33.Rh3 Ke6 34.gf6 Kf6=+ 35.Rh1 Kf5 36.h5?? g5–+ 37.Kf1 g4 38.Nh4 Kg5 39.f3 Bd3 40.Kg1 Bg3 41.f4 Kf6 42.Bg4 Bf2 43.Kh2 Bh4 44.Kh3 Bf2 45.Rc1 Bc2 46.Bf3 Be3 47.Bd5 Bc1 48.Ba2 Bf4 49.Bg8 h6 50.Kg4 Be3 51.d5 Bd1 52.Kh3 Bh5 53.Kg3 Be2 54.d6 Bb5 55.Kg4 Ke5 56.Kf3 Bc5 57.Kg3 Bd6 58.Bb3 Be2 59.Kf2 Bg4 60.Bc2 Kf4 61.Ba4 h5 62.Bc6 h4 0–1. Doctor 3.0 – Crafty 19.01, 2003.

4.ab4 e4 5.b5 (5.e3 Nf6 6.b5 d5 7.Bd4=; 5.c4 Nf6 6.Qa4 Be7 7.d3=; 5.Ra4 d5 6.e3 Nf6 7.Bf6=; 5.Nc3 d5 6.e3 Nf6 7.Nb5=) 5...d5 6.Bd4 a6 7.Nc3 =.

>b>4.ab4 Qe7 5.b5 (5.e3 d5 6.Ra4 Qe6 7.Nf3=; 5.c4 Qb4 6.Be5 Qc4 7.e3=+; 5.Ra3 Nf6 6.Nf3 e4 7.Bd4=+; 5.d4 e4 6.Ba3 e3 7.fe3=; 5.Na3 d5 6.e3 Nf6 7.Ne2=) 5...Nf6 6.Nf3 e4 7.Nd4 =.

4.ab4 f6 5.b5 (5.c3 d5 6.e3 Bd6 7.Na3=; 5.Ba3 d5 6.e3 Bf5 7.Bb5=; 5.Bc3 Qb6 6.e3 Bb4 7.Bb4=+; 5.Nc3 d5 6.b5 d4 7.Na4=+; 5.e4 Bb4 6.Bc4 Nc6 7.c3=) 5...d5 6.d4 e4 7.e3 =.

4.Be5 ba3 5.Bb8 (5.e3 Nc6 6.Bf4 Nf6 7.Na3=; 5.Nf3 Nc6 6.Na3 Ne5 7.Ne5=; 5.Na3 Nc6 6.Bf4 Nf6 7.Nf3=; 5.Bg3 Nf6 6.Na3 Ne4 7.e3=; 5.c3 Nc6 6.Bf4 Nf6 7.e3=) 5...Rb8 6.Na3 b5 7.Nf3 =.

4.Be5 Bc5?? 5.Bg7+- Nf6 (5...Bd4 6.Bd4 Nf6 7.ab4+-) 6.Bh8 Ke7 (6...d5 7.ab4 Bb4 8.e3+-) 7.Bf6 (7.Bf6 Kf6 8.d4+-) 1–0. Pierre – GuestSxqey, internet, 2020.

4.Be5 d6 5.Bg3 (5.Bb2 ba3 6.Na3 Nc6 7.Nf3=; 5.Bd4 Nc6 6.Nf3 ba3 7.e3=) 5...h5 6.f3 h4 7.Bf2 =.

4.Nf3 e4 5.Nd4 Nf6 6.d3 d5–/+ 7.ab4 Bb4 8.Nd2 Nc6 9.g3 e3 10.fe3 Ng4 11.c3 Ne3–+ 12.Qb3 Nd4 13.cd4 0-0 14.Rc1 Qb6 15.Bc3 Bc3 16.Rc3 Qd4 0–1. mgriffin (1815) – epiglotis (2260), net–chess.com, 2001.

5.b5 Bc5 6.e3 d6 7.d4 ed4 8.ed4 Bb6 9.Bd3 0-0 10.Ne2 d5 11.0-0 Re8 12.Nd2 Bc7 13.c4 dc4 14.Nc4 Be6 15.Qc2 Nbd7 16.Ne3 Nb6 17.Rfc1 Rc8 18.Qd2 Nbd5 19.g3 Ne3 20.fe3 Bb6 21.Nf4 Rc1 22.Rc1 Bg4 23.Rf1 Qd7 24.Qc3 Ne4 25.Qc2 Ng5 26.Bc1 Rc8 27.Qb1 h6 28.Bd2 Re8 29.Qa2 Bc7 30.Qd5 Qd5 31.Nd5 Bf3 32.h4 Bd5 33.hg5 hg5 34.Rf5 Bb3 35.Rg5 f6 36.Rh5 Bg3 37.b6 (37.e4!?+=) 37...ab6–/+ 38.Rb5 Bf7 39.Rb6 Be1 40.Bc1 Bd5 41.Rb5 Bc6 42.Rb3 Re7 43.Bc4 Kh8 44.d5 Ba4 45.Rb1 Re4 46.Bd3 Rb4 47.Ra1 Bc3 48.Ra2 Be5 49.Bf5 Rh4 50.Bd2 Bh2 51.Kg2 b5 52.Be1 ½–½. Fournier,Frederic – Hlousek,Josef, redhotpawn.com, 2009.

5.b5 d6 6.Nf3 Bf5 7.e3=.

5.Bc3 d6 6.e3 Be7 7.Be2=.

5.e3 Bb4 6.Be5 Nc6 7.Bb2=.

5.e4 Bb4 6.Be5 Qe7 7.Bf6=.

5.Be5 Bb4 6.Nc3 Nc6 7.Bf6=.

5.Nf3 Ne5 6.Ne5 Qa5 7.Nc4=.

5.Nf3 Ne5 6.Ne5 Qf6 7.d4 d6 8.Nf3 b3 (better 8...ba3!? 9.e3 d5=) 9.cb3+/- Nh6 (9...d5 10.Nc3 Qc6 11.Qd2+/-) 10.e3 Bd7 11.Nc3 Qd8 12.Bd3 Be7 13.0-0 g6 14.Nd5 Kf8 15.Rc1 Kg7 16.Qd2 (better 16.Ne7 Qe7 17.Rc7+-) 16...Re8? (better 16...Bc6 17.Bc4 b5 18.Ne7 Qe7+-) 17.Nc7 (17.Ne7?! Qe7 18.Rc7 Qd8+-) 17...Bf6 (17...Bc6 18.Na8 Qa8 19.Qe2+-) 18.Ne8 Be8 19.e4 Ng8 20.e5 (20.Rfd1 Bd7+-) 20...de5 21.de5 Be7 22.Rfd1 (22.a4 Bc6 23.Qe3 Nh6+-) 22...Bc6 (22...Ba3 23.Ra1 Qe7 24.Be4+-) 23.Qb2 Kf8 (23...Bf3 24.gf3 Bf8 25.Be4 Qg5 26.Kh1+-) 24.Nd4 (better 24.Bg6!? Qb6 25.Bh7 Bf3 26.gf3 Qe6+-) 24...Qb6 25.Bc4 White prepares e6 25...Re8 26.Bf7! Kf7 27.e6 Kf8 28.Nc6 (28.Nc6 bc6 29.Qc3+/-) 1-0. FeegLood (2335) - Arka50 (2070), lichess.org, 2016.

5.Bg3 Qa5 6.Qc1–/+ Nf6 7.e3=.

5.Bg3 d5 6.e3 Nf6 7.Nf3 Ne4 8.Bb5 Ng3 9.hg3=. marus – sierwannabe, internet live, 2001.

5.Bg3 Nf6 6.e3 Qa5 7.Nf3=.

6.ab4 Bb4 7.Nf3 d5 8.e3 Bd6 9.Bd3 Bg4 10.0-0 h5 (10...0-0 11.h3 Bh5 12.Nc3=) 11.Nc3 Ne5 12.Be2 Bf3 13.Bf3 Attacks the isolani on d5 13...Nc4 14.Rb1 Bh2 (better 14...Ne4 15.Nd5 Bh2 16.Kh2 Nb2 17.Rb2 Qd5+/-) 15.Kh2+/- Ng4 16.Kg3?? (better 16.Kh3+/-) 16...Qd6 17.Kh4 g5! 18.Kg5 (18.Kg5 Qf6 Mate attack) 18…Qf6 0-1. black_bishop_88 (2535) - gonavarrete (2565), lichess.org, 2020. (=1.a3 e5 2.b4 c5 3.Bb2 cb4 4.Be5 Nc6 5.Bb2 Nf6)

6.e3 ba3 7.Na3=.

6.Nf3 d5 7.e3 a5 8.Bb5=.

6.Nf3 d5 7.e3 Bd6 8.ab4 Bb4 9.Bb5 0-0 10.c3 Bd6 11.Qa4 Bd7 12.Ba3 Ba3 13.Na3=+ Ne4 14.Nc2 Qf6 15.Nb4 Nb4 16.Qb4 Bh3 17.Bf1= b6 18.d3 Nd6 19.Qd4+= Qd4 20.Nd4 Be6 21.Nc6 a5 22.Rb1 Nc8 23.Be2 a4 24.0-0 a3 25.Ra1 Re8 26.Rfb1+= Ne7 27.Ne7 Re7 28.Rb6 Rc7 29.Rb3 Rca7 30.Ra2 Kf8 31.d4 h6 32.Bd3+/– Ke7 33.Kf1 h5 34.h4 f6 35.Ke2 g5 36.g3 Bg4 37.f3 Be6 38.Bb1 Bc8 39.hg5 fg5 40.Bg6 h4= 41.gh4 gh4 42.Kf2 h3 43.Kg1 Bd7 44.Bd3 Rf8 45.f4 Rfa8 46.Kh2+= Kd6 47.c4 dc4= 48.Bc4 Bf5 49.Rb6 Kc7 50.Rf6 Ra5 51.Be6 Be6 52.Re6 Rg8 53.Rf6?? Rg2!–+ 54.Rg2 hg2 55.Rf7 Kb6 56.Rf6 Kb5 57.Kg2 a2 58.Rf5 Ka4 59.Ra5 Ka5 60.Kf3 a1Q 61.Ke4 Qh1 62.Ke5 Qh8 63.Ke4 Kb5 64.Kd3 Qh7 65.Kd2 Kc4 66.Ke2 Qh5 67.Kf2 Kd3 68.d5 Qd5 (69.Kg3 Ke4 70.Kf2 Qd2 71.Kg3 Qe3 72.Kg2 Qf4 73.Kh3 Qg5 74.Kh2 Kf3 75.Kh3 Qg3#; 68...Qe2 69.Kg3 Ke3 70.f5 Qf3 71.Kh2 Kf2 72.f6 Qh5#) 0–1. Comet B50 – Crafty 19.01, 2003.

6.Nf3 d5 7.e3 Bd6 8.Bb5 0-0 9.ab4 Nb4=+ 10.0-0 a6 11.c3 Nc6–/+ 12.Be2 Bf5 13.Na3 Qe7 14.Nc2= a5 15.Ncd4 Bg4 16.Nb5 Ne4? 17.d3+/– Nc5? 18.Nd6+- Bf3 19.Bf3 Qd6 20.Ba3 Ne5 21.d4 Nf3 22.Qf3 Rfe8 23.dc5 Qc6 24.Rfb1 Re5 25.Rb6 Qd7 26.Rab1 Re7 27.c6 bc6 28.Be7 f6 29.Rb7 (29...Qe6 30.Bc5+-) 1–0. Fritz 5.32 – Crafty 19.01, 2003.

6.Nf3 d5 7.e3 Bd7 8.ab4 Bb4 9.Nc3=.

4.b5 Nd4 5.e3 Ne6 6.c4 (better 6.Be5!? d6 7.Bb2+/-) 6...d6= 7.Nf3 Nf6 8.d4 ed4 9.ed4 Be7 10.d5 Nc7 (10...Nf4 11.Qd2 N6h5 12.g3=) 11.Bd3+= a6 (better 11...Nh5!?+=) 12.b6+- Ncd5 13.cd5 Qb6 14.Bf6 (14.Nc3 0-0+-) 14...Bf6+/- 15.Ra2 Qa5 16.Qd2 Qc7 (16...Qd2 17.Nbd2 Bg4 18.h3 Bf3 19.Nf3+/-) 17.0-0 0-0 18.Qc2 g6 19.Nbd2 Bg4 20.Ne4 (20.a4 Rfe8+/-) 20...Bg7 21.Be2 Bf5 22.Bd3 b5 (22...Bg4 23.Neg5+/-) 23.Nf6 (better 23.Ned2 Bd3 24.Qd3+/-) 23...Bf6=+ 24.Bf5 gf5 25.Qf5 Bg7 (25...Qd8 26.Re1=+) 26.Ng5= Qe7?? (better 26...Rfe8 27.Qh7 Kf8=) 27.Qh7 1-0. danishguy (1985) - Lansen333 (1980), Rated Bullet game, lichess.org, 2020.

4.b5 Nce7 5.Be5 d5 6.e3 Ng6 7.Bb2 Nf6 8.c4 b6 9.cd5 Qd5 10.Bf6 gf6 11.Nc3 Qe6 12.Qf3 Rb8 13.Qc6 Qc6 14.bc6 Be6 15.Ba6 Rd8? (15...Bd6 16.d4+-) 16.Nb5 (16.c7 Rc8 17.Bc8 Bc8+-) 16...Ne5? (16...Bc8 17.d4 Ba6 18.Nc7 Ke7 19.Na6 cd4+/–) 17.c7 Rd5 18.Na7 Bg7 (18...c4 19.Rb1 Ba3 20.c8Q Bc8 21.Nc8+- (21.Bc8?! Nd3 22.Kf1 Nb4+-)) 19.c8Q Bc8 20.Nc8 (worse is 20.Bc8 c4 21.Rb1 Ra5+-) 20...Kd8 21.Nb6 (better is 21.f4 Nd3 22.Bd3 Kc8+-) 21...Rd6 22.Rb1 Kc7 23.a4 Rb6 24.Rb6 Kb6 25.Bb5 c4 26.Ne2 Nd3 27.Kf1 Rc8 28.Nc3 f5 29.Ke2 Kc5 30.Bd7 Rd8? (better is 30...Rb8 31.Rd1 Rb2+-) 31.Bf5 Kb4 32.Rb1 Ka3 33.a5 Bc3 34.dc3 Ka4 (34...Nb2 35.Ra1 Kb3 36.a6+-) 35.a6 (worse is 35.Bh7 Ka5 36.h3 Ne5+-) 35...Nc5 36.a7 (36.a7 Ra8 37.Rb4 Ka5 38.Bh7 Ra7 39.h4+-) 1–0. combijack (1790) – sgneps80 (1620), gameknot.com, 2009.

4.b5 a6 5.c4 Nf6 6.Nc3 Be7 7.d3 0-0 8.Nf3 d6 9.Ne4 (9.e3 Qa5=) 9...Bd7 10.Nf6 Bf6 11.a4 Qa5 12.Qd2 Qd2 13.Nd2 Rd8 14.Ne4 Be7 15.g3 ab5 16.ab5 Ra1 17.Ba1 Be6 18.Nc3 Nd7 19.h4 Ra8 20.Bb2 Bd8 21.Bg2 Ra7 22.Kd2 f5 23.Ra1 Ra1 24.Ba1 b6 25.Bd5 Kf7 26.f3 f4 27.gf4 Bd5 28.Nd5 Bh4 29.fe5 de5 30.Ke3 Bg3 31.Nc3 h5 32.Ne4 Bf4 33.Kf2 h4 34.e3 Bh6 35.Nc3 g5 36.Nd5 Bg7 37.Kg2 Kg6 38.Kh2 Bf6 39.Kh3 Kf5 40.Bb2 Bd8 41.Bc1 Ke6 42.Nc3 Kf7 43.Ne4 Kg6 44.Kg4 Exerts pressure on the backward pawn 44...Nf6 45.Nf6 Bf6 46.f4 ef4 47.ef4 gf4 48.Bf4 Bd8 49.Be3 Bf6 50.Bf2 Bd8 51.Bh4 Bh4 52.Kh4 Kf6 53.Kg4 Ke5 54.Kf3 Kd4 55.Ke2 Kc3?? (better is 55...Ke5+-) 56.Ke3 Kb3 57.Kd2 Kb2 58.d4! cd4 59.Kd3 1–0. Schalkwijk,Peter – Paluch,Andrzej, SL–2007–0-00124, 2007.

4.b5 d5 5.c4 d4 6.g3 f5 (6...Nf6 7.Bg2+=) 7.Bg2 Nf6 8.Qc2 Bd6 9.e3 0-0 10.Ne2 Be6 11.0-0 Nbd7 12.Bh3 (12.Re1 de3 13.de3 a6+=) 12...g6 (12...Nb6 13.d3+=) 13.f4 (13.d3 Ng4 14.ed4 ed4+=) 13...de3 (13...e4 14.ed4 cd4 15.Nd4 Qc4 16.Qc4 Bc4 17.Rc1–/+) 14.de3 e4 15.Nd2 Rad8 16.Nc3 Bf7 17.Rfd1 Rfe8 (17...Be7 18.g4 Ng4 19.Nce4=) 18.Nd5 (18.g4!? Be6 19.gf5 Bf5 20.Bg2+=) 18...Bd5+= 19.cd5 Kf7 (better is 19...Nd5!? 20.Nc4 N7f6=) 20.Nc4+= Rg8 21.Qc3 Rde8 22.a4 Re7 23.a5 g5? (better is 23...Ra8+/–) 24.b6 ab6 25.ab6 Qb8 26.Ra7 (26.Bf5 gf4 27.Be6 Kf8 28.Bg8 Kg8 29.ef4 Kg7+-) 26...Ne8 (26...Kf8 27.Qa5 Re8 28.Bf5 gf4 29.ef4 Bf4 30.Kh1 Bg3 31.Rf1 (worse is 31.hg3 Qg3 32.Qd2 Qf3 33.Kh2 Qh5 34.Bh3 Ng4 35.Kg1 Nf2 36.Bg7 Rg7 37.Bg4 Qg4 38.Kf1 Qg2 39.Ke1 Nd3 40.Qd3 ed3 41.Ne5 Re5) 31...Bh2 32.d6 Rg1 33.Rg1 Bg1 34.Kg1+-) 27.Bf5 Kf8 (27...gf4 28.Nd6 Qd6 29.Rb7 Nef6 30.Be6 Kf8 31.Bg8 fg3 32.Rd7 Rd7+-) 28.Be6 Rgg7 (28...Nb6 29.Bg8 Kg8 30.Qh8 Kf7 31.Qh7 Kf8 32.Qh8 Kf7 33.fg5+-) 29.Rda1 gf4 30.Ra8 fg3 (30...Be5 31.Ne5 Qe5 32.Qe5 Ne5 33.Be5+-) 31.Rb8 (31.Rf1 Ndf6 32.Rf6 Ref7 33.Nd6 gh2 34.Kh2 Qd6 35.Kh1 Ke7 36.Re8 Ke8 37.Bf7 Kd7 38.Rd6 Kd6 39.Qe5 Kd7 40.Qc7) 31...gh2 32.Kh1 Bb8 33.Rf1 Ndf6 (33...Nef6 34.Rf6 Ke8+-) 34.Rf6 Nf6 35.Qf6 Ke8 36.Qg7 (36.d6 h5 37.Qh6 Rg1 38.Kh2 Rg2 39.Kg2 Rg7 40.Qg7 Bd6 41.Nd6 Kd8 42.Qf6) 36...Rg7 37.Bg7 h5 (37...Ke7 38.Nd2 Bg3 39.Ne4+-) 38.d6 h4 39.d7 Ke7 40.Bf6! Ke6 (40...Kf6 41.d8Q Double attack) 41.d8Q h3 Plans Bxh4 42.Qb8 Kf6 43.Qd6 (43.Qe5 Kg6 44.Qe6 Kg7 45.Ne5 Kh8 46.Qf7 c4 47.Ng6) 43...Kf7 (43...Kf5 44.Qe5 Kg4 45.Qf4 Kh5 46.Ne5 c4 47.Qf5 Kh4 48.Qg4) 44.Kh2 (44.Ne5 Kg7 45.Qg6 Kf8 46.Qf7) 44...Ke8 (44...Kg7 45.Ne5 Kh8 46.Qg6 c4 47.Nf7) 45.Qc7 (45.Ne5 c4 46.Qe6 Kd8 47.Qd7) 45...Kf8 46.Ne5 Kg8 47.Qf7 1–0. Swartz,David (1940) – Mfundisi,Sandile (1870), Capablanca, 2016. (=1.a3 e5 2.b4 c5 3.Bb2 Qc7)

4.b5 d5 5.e3 Bf5 (5...Nf6 6.Nf3 Nbd7 7.d3–/+) 6.Ne2 (6.Nc3!? Ne7 7.Nf3+=) 6...Nd7=+ 7.Ng3 Bg6 (7...Be6 8.Nc3=+) 8.c4 d4 9.e4 (9.Be2 Ngf6 10.d3 Be7=+) 9...Nh6 (9...h5 10.h4–/+) 10.d3 (10.Be2 Be7=+) 10...a6 11.a4 ab5 12.ab5 Ra1 13.Ba1 Be7 14.h4 f6 (14...Qa5 15.Nd2 f5 16.Nf5 Nf5 17.ef5 Bf5 18.Be2–/+) 15.Be2 0-0 16.Bb2 (16.0-0 Ra8 17.Bb2 Be8=+) 16...Kh8 (16...Qa5!? 17.Nd2 Nb6=+) 17.Nd2 (17.Bc1 Ra8=) 17...Ra8 18.0-0 Ra2 (18...Nb6 19.Qc2=) 19.Qb3 (19.Qb1 Ra8=) 19...Ra5 (19...Qa5 20.Bd1 Nb6 21.Nf3=) 20.Rb1 (20.h5 Be8=) 20...Bf7 (20...Ra8 21.h5 Bf7 22.Rd1=) 21.Ra1 (21.Bc1 Be6+=) 21...Be6 (21...Ra1 22.Ba1 Qa5 23.Qd1=+) 22.Ra5 (22.Ra3 Ra3 23.Qa3 Nb6=) 22...Qa5 23.Ndf1 (23.Nf3 f5=) 23...g6 24.Bc1 (24.Qd1 Kg7=+) 24...Nf7 25.Bd2 (25.Qb2 Nd6=+) 25...Qa1=+ 26.Qd1 (26.Qc2!?=+) 26...Qd1–/+ 27.Bd1 f5 28.h5 f4 (28...Nd6 29.Bf3–/+) 29.Nh1 (29.hg6 hg6 30.Ne2 Ng5=+) 29...g5–/+ 30.g4 (30.f3–/+) 30...fg3 (30...Nd6!?–/+) 31.Nhg3 (31.fg3 Nd6=) 31...Nd6 (31...Nf6 32.Nh2=+) 32.Nh2 (32.h6 Kg8=) 32...h6 (32...Kg7 33.Kg2=) 33.Ng4 (33.Bg4 Bg4 34.Ng4 Kg7=) 33...Kh7 (33...Kg7 34.Nh2=) 34.Kg2 (34.Kh1 Bd8=+) 34...Bd8 35.f3 (35.Be1 Kg7=+) 35...Be7 (35...Ne8 36.Kf2=+) 36.Ba5 (better 36.Kf2=) 36...Bc4?? (better 36...b6 37.Bd2 Ne8–/+) 37.dc4+- Nc4 38.Bc7 (better 38.Nf5!? Bf8 39.Be1+-) 38...Nb2+= 39.Nf2 (39.Nf5 Bf8 40.f4 Nd1 41.fe5 c4 42.Nd4 c3+=) 39...c4= 40.Ba5 (better 40.Bc2!?=) 40...c3–/+ 41.Bc2 (41.Ne2 c2 42.Bc2 Nc4=+) 41...Nc4 (better 41...b6!? 42.Nf5 Bc5 (42...ba5?! 43.Ne7 a4 44.Nc6=) 43.Bc3 dc3–+) 42.Nf5=+ Bf6?? (better 42...Na5!? 43.Ne7 Nc4=+) 43.Bc7 (better 43.Bb4!?+-) 43...Na3= 44.Bb3 (44.Ba4!? c2 45.Nd3+=) 44...Nb5=+ 45.Ba4?? (better 45.Ba5 Nc5 46.Bf7=) 45...Nc5–+ (45...Nc7?! 46.Bd7 c2 47.Nd3–+) 46.Be5 (46.Ng4 Na4 (46...Nc7?! 47.Nf6 Kh8 48.Bd1–+) 47.Nf6 Kh8 48.Be5 c2 49.Nd7 Kg8 50.Nh6 Kh7+-) 46...Na4 (better 46...Be5 47.Bc2 Na3–+) 47.Nd4 (47.Bf6 c2 48.Nd3–+) 47...Nd4 48.Bd4 0–1. Gutt,Gregory (1765) – Joukl,Zdenek (2105), 26th WSCC, 2016.

4.b5 Nf6 5.c4 a6 6.Nc3 d6 7.a4 Nbd7 8.e3 Nb6 (8...Be7 9.Nf3=) 9.a5= Nbd7 10.b6 Qc6 (10...Qb8 11.Nf3+=) 11.Qb3 (11.d4 ed4 12.ed4 cd4 13.Qd4 Nc5+/-) 11...Nb8 (11...Be7 12.Nd5 Bd8 13.g3+=) 12.Nd5 Be7?? (better 12...Nd5 13.cd5 Qd7+=) 13.Nc7+- Kf8 (13...Kd8 14.Na8 Bf5 15.Ne2+-) 14.Ne2 (14.Na8 Kg8+-) 14...Be6 (14...Bh3 15.Rg1 (worse 15.Na8 Bg2 16.Rg1 Bf1 17.Kf1 Qf3+-; 15.gh3?! Qh1 16.Na8 Qh2+-) 15...Bd7 16.Na8+-) 15.Nc3 (15.Na8!? Ne8+-) 15...Nbd7 16.Na8 d5 (16...Ne8 17.Bd3 Qc8 18.Nc7 Nc7 19.bc7 Qc7 20.Be4+-) 17.Nc7 dc4 (17...d4 18.N3d5+-) 18.Ne6 fe6 19.Bc4 (19.Qa4 Qd6+-) 19...Kf7 (19...Qg2 20.0-0-0+-) 20.0-0 h5 (20...e4 21.Ne2+-) 21.f3 Bf8 (21...h4 22.Rac1+-) 22.Rfe1 (22.Ne4 Ne4 23.fe4 Ke7+-) 22...Rh6 (22...h4 23.Rf1+-) 23.Ra2 (better 23.d4+-) 23...Nd5 (23...h4 24.Rf1+-) 24.Kh1 (better 24.Nd5 h4+-) 24...Rf6 (24...Nc3 25.Qc3 h4+-) 25.Kg1 (25.Kg1 Rh6 26.Nd5+-) 1-0. pereira – ffelchle, internet, 2021.

4.b5 Nf6 5.e3 Be7 6.c4 d6 7.Nc3 0-0 8.a4 a6 9.Nge2 Bg4 10.f3 Be6 11.d3 Nbd7 12.e4 Nh5 13.Bc1 f5 (13...ab5!? 14.Nb5 Qd8+=) 14.ef5= Bf7 15.g4 (15.Rb1!?=) 15...Bh4+= 16.Kd2 Nf4 17.Kc2 Ne2 18.Qe2 d5 19.Rg1 (19.ba6 Ra6 20.Nd5 Bd5 21.cd5 Rfa8+=) 19...dc4 20.dc4 Nb6 21.Qe4 Bf2 22.Rg2 Bd4 23.Rb1 Nc4?? (23...Rad8 24.Bg5 Rd6–/+ (worse is 24...Nc4 25.Bc4 Bc4 26.b6+/–)) 24.Nd5+/– Qa5 (24...Na3!? 25.Ba3 Qa5+/–) 25.Bc4+- Kh8 26.Bd2 (better is 26.Kd3!?+-) 26...Qa4+/– 27.Kd3?? (better is 27.Bb3 Qb5 28.Nb6 Bb3 29.Rb3+/–) 27...ab5–+ 28.Rb5 Qd1 29.Qe2 (29.Rb3 b5! 30.Rg1 bc4 31.Kc4 Qd2 32.Ra1 Ra1 33.Qe5 Bd5 34.Qd5 Ra4 35.Kb5 Qa5 36.Kc6 Rc8 37.Kd7 Qc7 38.Ke6 Re8) 29...Ra3 30.Ke4 Qc2 31.Bd3 Rd3! 0–1. Remizov,Juri – Vakhrushev,Valeriy, Ulan–Ude RUS, 9th Baikal Open, 2013.

4.b5 Nf6 5.e4 d5 6.ed5 Nd5=.

4.Nc3 cb4 5.ab4 Nf6 (5...Bb4? 6.Nb5 Qc5 7.e3+-) 6.e3 Bb4? (better is 6...Qd8!? 7.b5 d5=) 7.Nb5+/– Qb6 8.Be5 Na6 (8...d6 9.Bf6 gf6+-) 9.Ra6! ba6 (9...Qa6 10.Nc7; 9...ba6 10.Nc7) 10.Nc7 Kf8 11.Na8 Qa5 (11...Qc6 12.c3 Be7 13.Qf3+-) 12.Bf6 gf6 13.c3 Bd6 14.Qb3 Qa1 15.Ke2 a5 16.Qc4 Bb7 17.Nc7 a4 18.Nb5 Ba6 19.Kf3 a3 20.Qd5 Be7 21.Bc4 Qd1 22.Ne2 (22...Bb7 23.Qb7 Qh1 24.Qd5+-) 1–0. Nda_Vie (2115) – AntoniusBlock, internet, 2009.

4.bc5 Bc5 5.e3 Nc6=.

4.Nf3 Nc6 5.b5+= Nd4 6.e3 Nf3 7.Qf3 Nf6 8.e4 (8.Nc3 d6+=) 8...d6= 9.Bc4 Be7 10.h3 (10.0-0 Be6 11.Qe2 0-0=) 10...0-0 11.Nc3 a6 (11...Be6 12.Qd3=) 12.ba6 ba6 13.0-0 (13.Qe2 Be6=) 13...Bb7 (13...Be6 14.Qd3=) 14.d3 (14.Rfb1 Bc8=) 14...Rab8 15.Rfb1 h6 (15...Bc8 16.Bc1=) 16.Ne2 (16.Bc1 Nd7+=) 16...Rfd8 (16...Bc6 17.Bc1+=) 17.Qg3 Rd7 18.Bc1 g5 (18...Kf8!?+=) 19.h4+/– Nh7 20.Nc3 Kf8 (20...Rdd8!?+/–) 21.Qf3+- Bd8 22.Be6 Re7 23.Bf5 f6 24.Qh5 Rg7 25.Qh6 Kg8 26.Be6 Kh8 27.Nd5 Qa5 28.Bf5 Kg8 29.Bh7 Rh7 30.Qg6 (30...Rg7 31.Qe8 Kh7 32.Nf6 Bf6 33.Qb8 Qe1 34.Kh2 Qf2 35.Be3 (35.Rb7?! Qh4 36.Kg1 Qe1 37.Kh2 Qh4 38.Kg1 Qe1 39.Kh2 Qh4=; 35.Qd6 gh4 36.Bg5 Bg5 37.Qc7 Bf4 38.Kh1 Qg2) 35...Qe3 36.Rb7 gh4 37.Rg7 Bg7 38.Rg1+- (38.Qd6?! Qg3 39.Kh1 h3=)) 1–0. Pleschke,Helmut – Ross,John, corr ICCF, 1998.

4.Nf3 e4!? 5.Ng1 cb4 6.ab4 d5 = (6...Bb4?? 7.Bg7 Bd6 8.Bh8+-).

4.b5 Bf5 5.e3 Nf6 6.c4 g6 (6...Be7 7.Nc3=+) 7.Nf3 Bg7 (7...e4 8.Ng1=) 8.d4= ed4 9.ed4 cd4 (9...0-0 10.Be2=) 10.Bd4 0-0 11.Bd3 (11.Be2 a6=) 11...Bg4 (11...Bd3!? 12.Qd3 Re8 13.Kf1 Nbd7=+) 12.0-0+= Nbd7 13.Qc2 (13.Re1 Qc7+=) 13...Ne5 (better 13...Bf3 14.gf3 Nh5 15.Bg7 Kg7=+) 14.Be4?? (better 14.Ne5 de5 15.Be5+=) 14...Ne4-+ 15.Qe4 Bf3 (better 15...Nf3 16.gf3 Bh3-+) 16.gf3 Qg5 (16...Rc8 17.Rd1-+) 17.Kh1-/+ Rac8 18.Be3 (18.Rg1 Qh5 19.Qd5 Rc4 20.Rd1-+) 18...Qh5-+ 19.Nd2 Bh6?? (better 19...Nc4 20.Nc4 Ba1 21.Nd6 Be5-+) 20.Bh6 Qh6 21.f4 (21.Rfd1!?=+) 21...Ng4-/+ 22.Qg2 f5 (22...Qf4 23.Rad1 Rfd8-/+) 23.f3? (better 23.Rad1=+) 23...Ne3-+ 24.Qe2 (24.Qg5 Qg7 25.Rfb1 Qc3-+) 24...Qf4 (24...Nf1!? 25.Qe6 Kg7 26.Rf1 Qf4 27.Rd1-+) 25.Rg1 (25.Rfc1 Rc5-+) 25...Rce8 (25...Nc4 26.Nc4 Rc4 27.Qd3-+) 26.Rae1 (26.Qd3 Rf7-/+) 26...Nc2 27.Qe8 Re8 28.Re8 Kf7 29.Rb8? (better 29.Re2-+) 29...Qd2 30.Rb7 Kf6 31.b6 (31.Rh7 Na3 32.Ra7-+) 31...ab6 (31...Qe2!? 32.Rd7 Qf3 33.Rg2-+) 32.Rb6 Ne3 (32...Qd3 33.a4 Qf3 34.Rg2-+) 33.a4 (33.c5 Qe2 34.Rd6 Ke7-+) 33...Nc4 34.Rc6 (34.Rbb1 Qe2 35.Rg3 Ne3-+) 34...Qe2 (better 34...Ne5!? 35.Rd6 Qd6 36.Rf1-+) 35.Rc4 Qc4 (35...Qf3 36.Rg2 Qf1 37.Rg1 Qc4 38.Re1-+) 36.Kg2 (36.Re1 Qa4 37.Kg2 d5-+) 36...Qa4 (36...Qe2 37.Kh1 Qf3 38.Rg2-+) 37.Kg3 (37.Rc1-+) 37...Qh4 (better 37...f4 38.Kg2 Qc2 39.Kh1 Qf2-+) 38.Kh4+- g5 (38...h6 39.f4+-) 39.Kg3 (better 39.Rg5 d5+-) 39...h6 40.Kf2 (40.Re1 Kf7+-) 40...f4 (40...d5 41.h4!+-) 41.Rg4 Kf5 42.Rg5 (better 42.h4+-) 42...hg5 (better 42...Kg5 43.Ke2 Kh4-+) 43.h4 (43.Ke2 g4 44.fg4 Kg4 45.Kf2-+) 43...d5 (43...gh4 44.Kg2-+) 44.Ke2 (44.h5-+) 44...gh4 45.Kd3 Ke5 46.Kd2 h3 47.Ke2 (47.Kc2 h2 48.Kb3 h1Q 49.Kc3 Qf3 50.Kc2 Qe2 51.Kb3 Qc4 52.Kb2 f3 53.Ka3 f2 54.Kb2 f1Q 55.Ka3 Qfc1) 47...h2 48.Kf2 (48.Kd1 h1Q 49.Kd2 Kd4 50.Kc2 Qa1 51.Kd2 Qb2 52.Ke1 Ke3 53.Kd1 Qd2) 48...h1Q-+ 49.Ke2 Qf3! 50.Kf3 d4 51.Kg4 Ke4 (51...Ke4 52.Kh3 d3 53.Kg4 d2 54.Kg5 f3 55.Kf6 f2 56.Ke7 f1Q 57.Kd6 d1Q 58.Kc5 Qd4 59.Kc6 Qa6 60.Kc7 Qdd6) 0-1. danishguy (2090) - anabelangel (2080), Rated Bullet game, lichess.org, 2020.

4.bc5 f6 5.cd6 Bd6 6.Nc3 Be6 7.e3 a6 8.Ne4 Bf5 (8...Nc6 9.Nf3+/–) 9.Nd6 Qd6 10.c3 (10.d4 ed4 11.ed4 Ne7+/–) 10...Ne7 11.d4 Nbc6 12.de5 Qe6 (12...Qe5 13.Nf3 Qc7 14.Nd4+=) 13.Nf3 (13.ef6!? Qf6 14.Qb3+-) 13...Rd8 14.Qa4 0-0 (better is 14...fe5!? 15.Be2 Bd3 16.Bd3 Rd3+=) 15.Bc4+- Nd5 16.ef6 (16.Bd5 Rd5 17.e4 Ne5+-) 16...Rf6+/– 17.0-0 (17.Bd5 Rd5 18.c4 Ra5+-) 17...Kh8? (better is 17...b5!? 18.Bd5 Qd5+= (18...ba4? 19.Be6 Be6 20.e4+-)) 18.Ng5 Qe5? (18...Qe7!? 19.Bd5 Rd5+-) 19.Bd5 Rd5? (19...b5 20.Qa6 Qd5 21.c4 bc4 22.Bf6 gf6 23.Rad1+-) 20.Qh4 (20.c4 Ra5 21.Qb3 Qc7 22.Bf6 gf6+-) 20...h6?? (20...Rd3 21.e4 Bg6 22.f4 Qc5 23.Kh1+/–) 21.Rad1 Rc5 22.Nf3 Qe6 23.c4 Rc4+/– 24.Bf6 Rh4 25.Bh4 g5 26.Bg3 g4 27.Nd4+- Nd4 28.ed4 Qd6?? 29.Bd6 (29...b6 30.Rfe1+-) 1–0. PulveRIZER09 – saul, Live Game Caissa's Web, 2004.

4.bc5 Nf6 5.cd6 Bd6 6.Nc3+=.

4.e3 Nc6 5.b5 Nce7 6.c4 Ng6 7.Nf3 Nf6 8.d4 Be7 (8...cd4!? 9.ed4 e4=) 9.de5+= de5 10.Qd8 Bd8 11.Ne5 Ne5 (11...Ba5 12.Kd1+=) 12.Be5+/- Be6 13.Nc3 (13.Nd2 a6+/-) 13...0-0 (13...Nd7 14.Bg7 Rg8 15.Bh6+=) 14.0-0-0+- a6 15.Be2 ab5 16.Nb5 Ne4 17.f3 (17.Rhf1 Ra4 18.Kc2 Bf6 19.Bf6 Nf6+/-) 17...Bf6 (better 17...Nf2!? 18.Bd6 A) worse 18...Nd1 19.Rd1 (worse 19.Bf8 Ne3 20.Bc5 Ng2=+) 19...Re8 20.Bc5+=; B) 18...Re8 19.Bc5 Rc8=+) 18.Bf6+/- (18.fe4?! Be5 19.g3 Ra4=+) 18...Nf6 19.Rd6 (19.Kb2 Rfc8+/-) 19...Ra4 20.Re6 (better 20.Kc2+/-) 20...fe6=+ 21.Kb2 Nd7 (21...Rd8 22.Rd1 Rd1 23.Bd1=+) 22.Kb3 Ra5 23.Rd1 Ne5 (23...Rd8 24.Nc7=) 24.f4+= Ng6 25.Rd7 b6 26.h3 (26.Bg4 e5 27.fe5 Ne5 28.Be6 Kh8+/-) 26...h6 (26...e5!? 27.g3 ef4 28.ef4 Re8=) 27.g4 (27.Rb7 Nh4 28.Rb6 Rf6+/-) 27...e5 28.Bd3 ef4 29.ef4?? (better 29.Bg6 f3 30.Rd1+/-) 29...Nf4-+ 30.Bf5 g6 31.Bc2 h5 (31...Re8 32.Rd6-+) 32.Nd6 (32.Rd6!?-/+) 32...Ne2 (better 32...Nh3 33.Bg6 hg4-+) 33.Ne4? (better 33.Bg6 Nd4 34.Kb2 Rf2 35.Kb1 Ra3 36.gh5 Rb3 37.Ka1 Rh3 38.Rd8 Kg7 39.Rd7 Kf8 40.Rf7 Rf7 41.Nf7 Nb3 42.Ka2-+) 33...Nd4 34.Kc3 (34.Kb2 Nc2 35.Kc2 Rf4 36.Rd8 Kf7 37.Ng5 Ke7-+) 34...Nc2 (34...Ra3 35.Kd2 Ra2 36.Rd4 cd4 37.gh5 gh5 38.Kd3 Rf3 39.Kd4 Rc2 40.h4-+) 35.Kc2 hg4 36.Ng5 (36.hg4 Rf4 37.Re7-+) 36...Ra3 (36...gh3!? 37.Nh3 Ra3 38.Ng5 Rf2 39.Kb1 Rb3 40.Kc1 Rc3 41.Kd1 Rc4 42.Rd8 Kg7 43.Ne6 Kh7 44.Rd2 Rd2 45.Kd2-+) 37.hg4 Rf2 38.Kb1 Rg3 (38...Rg3 39.Rd8 Rf8 40.Rf8 Kf8-+) 0-1. danishguy (2150) - ozzz93 (2280), Rated Bullet game, lichess.org, 2020.

4.c4 Nf6 (--> 1.b4 e5 2.Bb2 e4 3.c4 Nf6 4.a3 c5).

4.bc5 Na6 5.d4 ed3 6.cd3 Nc5 7.e3 (7.Nf3 d5=) 7...d5 8.Nc3 Nf6 9.d4 (9.Nf3 Bd6=) 9...Nce4 10.Nf3 Bd6 11.Bd3 (11.Bb5 Bd7 12.Bd7 Qd7=) 11...0-0 12.Nd5 (12.0-0!?=) 12...Qa5+= 13.Nc3 Nc3 14.Qd2 Nfd5 15.Rc1 Be6 (15...Bd7 16.Bc3 Qa3 17.Bb2=) 16.Bc3 Nc3 17.Qc3 (worse is 17.Rc3 Ba3 18.Rc4 Qd2 19.Kd2 Bc4 20.Bc4 Rfc8–/+) 17...Qa4 18.0-0 Rac8 19.Qd2 Bd5 (19...h6 20.Ra1+=) 20.e4 Bb3 21.e5 Ba3 22.Ra1 b5 (22...f6 23.Rfb1 fe5 24.Bb5 Qb5 25.Ra3+-) 23.Bb5!+- Qb5 24.Ra3 Rc2 (24...Bd5 25.Ra7 Bf3 26.gf3+-) 25.Qe3 Bc4 (25...Bd5 26.Ra7 Rfc8 27.Rfa1+-) 26.Rc1 (26.Rfa1!? a6 27.Ra6 Qb2+-) 26...Rc1+/– 27.Qc1 a6 28.Ng5 Bd5 29.Qc2 g6 30.Ne4 Be4 31.Qe4 Qb2 32.Re3 Rb8 33.Re1 Qd2 34.Rc1?? Qc1 (34...Qc1 35.Qe1 Qe1#) 0–1. Kazimierski,Tomasz (1750) – Koolsbergen,Nico (1835), IECC, 1999.

4.bc5 Na6 5.e3 Nc5 6.d3 Nf6 7.Bf6 Qf6 (worse is 7...gf6 8.de4 Ne4 9.Qd5+/–) 8.d4 Ne6 9.Nc3 Qg6 10.Nge2 Bd6 11.Ng3 f5 12.Qb1 0-0 13.Bc4 h5 (13...Kh8 14.Nb5 Bb8 15.Qb4=) 14.Nb5 Bb8 15.Qb4 (better is 15.d5!? Ng5 16.d6 Ne6 17.Be6 de6 18.0-0=) 15...h4–/+ 16.Ne2 a6 (16...f4 17.g3 hg3 18.hg3 fe3 19.fe3+=) 17.Nd6 Qg2 18.Kd2?? (18.Rg1 Qh2 19.Nc8 Rc8 20.Be6 de6=) 18...f4 (18...Bd6 19.Qd6 f4 20.Qe5=) 19.Rag1 (better is 19.Nc8!? Rc8 20.Qb7 fe3 21.fe3 (21.Ke3?? Qf3 22.Kd2 e3 23.fe3 Qb7–+) 21...Rc4 22.Qa8 Rc2 23.Kc2 Qe2 24.Kb1 Qd3 25.Kb2 Qd2 26.Kb1 Qd3 27.Kb2 Qd2 28.Kb1 Qd3=) 19...Qf2+= 20.ef4 a5 21.Qc5 e3 (21...Bd6 22.Qd6 b5 23.Bd5+-) 22.Kd1 Bd6 23.Qd6 h3 (better is 23...a4!?+=) 24.Rg3+- b5 25.Bd5 (25.Bb5?! Rf4 (worse is 25...Nf4 26.Bc4 Ne6 27.Re1+/–) 26.c3 Rf7+=) 25...Ra7 26.Qe5 Rf7 27.Rhg1 (27.Qe3?! Qe3 28.Re3 b4+/–; 27.Re3 Rf5 28.Qf5 Qe3+-; 27.Rh3?! Bb7 28.Rf3 Qh4+/–) 27...d6 (27...Qh2 28.Rg7 Kf8 29.Qd6 Ke8 30.Rg8 Rf8 31.Rf8 Nf8 32.Rg8 Qg1 33.Ng1 e2 34.Ke2 Bb7 35.Qf8) 28.Qe4 Rae7 29.Rh3 (29.Qe3?! Qe3 30.Re3 Rf6+/–) 29...Re8 30.Qh7 Kf8 31.Rf3 Qe2 32.Ke2 Nd4 33.Ke1 Nf3 34.Bf3 Bf5 35.Qh4 b4 36.ab4 ab4 37.Bc6 (37.Bd5 e2+-) 37...Rc8 38.Rg3 Be6 39.f5 Rf5 40.Qh8 Ke7 41.Rg7 (41.Rg7 Kf6 42.Qh6 Ke5 43.Re7+-) 1–0. Cirulis,Ilmars (1890) – Salonen,Jukka (1920), FICGS, 2015.

4.bc5 Nf6 5.d4=.

4.bc5 Nf6 5.Bf6 Qf6 6.Nc3 Qe6 7.e3 a6 (7...Bc5!? 8.Nh3 Qe5+=) 8.Qh5+/– g6 9.Qd5 Qd5 (9...Bg7 10.Qb3+/–) 10.Nd5 Kd8 11.d4 (11.f3 d6+/–) 11...ed3 12.Nf3 d6 (12...Bc5 13.cd3 Be7 14.Ne5+/–) 13.Ng5 Be6 14.Nf4 dc5 (14...Kd7 15.Bd3 Be7 16.h4+/–) 15.Nfe6 fe6 16.Nf7 Kc7 17.Nh8 Bg7 18.Ra2 (18.0-0-0 dc2 19.Kc2 Bh8+-) 18...Bc3 (18...Bh8 19.Bd3 Nc6 20.h4+/–) 19.Kd1 Bh8 20.cd3 Nc6 (20...b5 21.Rc2 Nd7 22.g4+/–) 21.g3 (21.Rc2 Kd6+-) 21...b5 22.Rc2 Kd6 23.Bg2 Rc8 24.f4 a5 25.Ke2 b4 26.d4 cd4 27.Rb1 Rc7 28.Bc6 Rc6 29.Rc6 Kc6 30.ab4 ab4 31.Rb4 de3 32.Ke3 Bf6 33.Ra4 Kd5 34.Ra5 Kd6 35.Ke4 h5 36.Ra7 h4 37.gh4 Bh4 38.Rg7 Be1 39.Rg6 Ke7 40.Rg4 (40...Kf7 41.h4+-) 1–0. Riepe,Bernhard (2080) – Nittschalk,Karl (1760), desc–online.de, 2003.

4.bc5 Nf6 5.Bf6 Qf6 6.Nc3 Qf5 7.f3=.

4.bc5 Nf6 5.Bf6 Qf6 6.Nc3 Qg6 7.Nh3 Na6 8.Nf4 Qf5 9.Nfd5 Bc5 10.e3 0-0 0–1. Kazimierski,Tomasz – Milde,Lars, SB–2010-0-00108, 2010.

6.c4 0-0 A) 7.Nc3 d6 8.d3 Bf5 9.de4 Ne4=; B) 7.d4 Bb6 8.Nd2 Ba5 9.Ne2 d5=; C) 7.Qc2 d6 8.d3 Re8 9.Nc3 Bf5=+; D) 7.d3 Bb6 8.Nd2 Ba5 9.Qc2 Re8=.

6.c4 b6 A) 7.Nc3 Bb7 8.Nd5 Nd5 9.cd5 Qh4=; B) 7.d4 Be7 8.d5 d6 9.f3 0-0=; C) 7.d3 Bb7 8.de4 Ne4 9.Qg4 Rg8=; D) 7.f3 Bb7 8.fe4 Ne4 9.Qg4 Rg8=.

6.d3 0-0 A) 7.de4 Ne4 8.Nc3 Qb6 9.Qc1 < d5?!unclear; B) 7.Nd2 d5 8.c4 d4 9.ed4 Bd4=+; C) 7.Be2 d5 8.Nd2 Re8 9.de4 de4=+; D) 7.Ne2 d5 8.de4 Ne4 9.Nbc3 Nc3=+; E) 7.c4 d6 8.Nd2 ed3 9.Bd3 Nc6=.

6.d3 Qb6 A) 7.Be5 d5 8.Nc3 Nbd7 9.Rb1 Qd8=+; B) 7.Ra2 d5 8.de4 de4 9.Nd2 Be6=+; C) 7.Bc3 d5 8.de4 de4 9.Nd2 Nbd7=+; D) 7.Qc1 d5 8.Nd2 Nbd7 9.Rb1 Qe6=; E) 7.Bf6 Qf6 8.d4 Bb6 9.Qg4 Qg6=.

6.d3 d5 7.de4 Qb6 8.Bf6 Qf6 9.c3 de4=.

7.Nc3 Qe6 8.Nh3 Qe5 9.Bc4 Nc6 +=.

7.Nc3 Qf5 8.Bc4 0-0 9.Nge2 +=.

7.Nc3 Qf5 8.Bc4 Qg6 9.Bd5 f5 +=.

7.Nc3 Qg6 8.Nge2 Bd6 9.d3 ed3 +=.

7.Nc3 Qh4 8.Nd5 Bd6 9.d3 ed3 +=.

8.Bc4 0-0 9.Bd5 Qe7 +=.

8.Bc4 0-0 9.f4 Qe7 = (9...ef3 10.Nf3+/–).

8.Bc4 Nc6 9.Nge2 b6 10.Bd5 f5 11.0-0 Bd6+= 12.Ng3 Ba6= 13.f4 Qf6 14.Nge2 Rc8 15.g4 Ne7=+ 16.Bb3 Qg6 17.Rf2 fg4 18.Ng3 Rc3 19.dc3 Bc5 20.Qd2 Nf5 21.Qd5+= Ng3 22.hg3 Rf8 23.Rd1 Bb5 24.f5 Qc6 25.Qe5+= Kd8 26.a4 Ba4 27.Ba4+- Qa4 28.Qg7 Qc6 29.Kg2 Kc8 30.f6 a5 31.Rf5 a4 32.Rdd5 Ba3? 33.f7 Qg6?? 34.Qe5 Qe6 35.Qf4?? Rf7= 36.Qg4 Rf5 37.Rf5 Bb2 38.Rf8 Kb7 39.Qf4 Qc6 40.Qb8 Ka6 41.c4 a3 42.c3 Bc1 43.Qe5 a2 44.Qb8+/– Be3 45.Qa8 Qa8 46.Ra8 Kb7 47.Ra2 Bg5 48.Re2 e3 49.Rb2 Kc6 50.Kf3 h6 51.Ke4 Kc5 52.Kd3 Kc6 53.Rb5 d6 54.Rb1 Kc5 55.Rb2 Kc6 56.Kd4 Kc7 57.Kd5+- Bf6 58.Re2 Bg5 59.Re1 Kd7 60.Rd1 Bf6 61.Rd3 Bg5 62.Rd4 1–0. Ermenkov,Evgenij – Adorjan,Andras, It (cat.10), Riga (Latvia), 1981.

8.Bc4 Nc6 9.Nge2 Bb6 10.Ng3 f5 11.Nd5 g6 12.0-0+/– Bd8 13.f3 b5 14.Bb3 ef3+= 15.Qf3 Bb7 16.d4 Qg7 17.Ne4 Be7 18.Nec3 Na5 19.Nb5 Nb3 20.Ndc7 (20...Kf7 21.Qb7 Na1 22.Qd5 (22.Ra1?! Rad8+/–) 22...Kf6 23.e4+- (23.Na8?! Ra8 24.Qa8 Nc2+-)) 1–0. Benassi,Aspasio (2040) – Quirini,Luciano (1900), Italia Scacchistica A, 1999.

8.Bc4 Nc6 9.Nge2 d6 10.d3 ed3 11.cd3 += (< 11.Bd3 d5=+).

(--> 1.b4 e5 2.Bb2 f6 3.a3 c5).

4.bc5 Bc5 5.e3 Nc6 6.Nf3 d5 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 c5 5.bc5 Bc5 6.Nf3 Nc6).

4.a4 ab5 5.c3 d6 6.e4 Bd7–+ 7.Bb2 ba4 8.Nf3 g6 9.d3 Bg7 10.Nbd2 b5 11.g3 Ne7 12.Bg2 0-0 13.0-0 f5 14.ef5 Bf5 15.Qe2 d5 16.Ba3 e4 17.de4 de4 18.Ne4 Be4 19.Qe4 Nbc6 20.Rac1 c4 21.Be7 Ne7=+ 22.Rfe1 Nf5 23.Qe6=+ Kh8 24.Ng5? Ra7 25.Be4?? a3 26.Rcd1? Qg5 27.Rd7 Rd7 28.Qd7 Bc3 29.Rd1 a2 30.Bf5 Qf5 31.Kh1 Qd7 (32.Kg1 Qd1 33.Kg2 a1Q 34.Kh3 Qf3 35.Kh4 Qh5#) 0–1. davidfoosangchin – primeval (1635), internet, 2007.

4.Nc3 ab5=+ 5.Nb5 Qb6 6.c4 d5 7.d3 Nf6 8.Bb2 e4 9.d4?? dc4–+ 10.a4 cd4 11.Bd4 Bb4 12.Bc3 Bc3 13.Nc3 0-0 14.Nd5?? Nd5 15.Qd5 Qb4 16.Qd2 c3 17.Qc2 Bd7 18.e3 Ra4 19.Ra4 Ba4 20.Qc1 c2 21.Ke2 Bb5 0–1. Pawno Paul – METSAR, ChessWorld.net, 2005.

4.e3 d5=+ 5.c4 ab5 6.cd5 b4 7.a4? Nf6 8.Bb2 Nd5 9.Be5 Bd7. Silva,Francisco (1870) – Rente,Helder (1825), POR–ch Univ, 2002.

4.e4 ab5 5.Bb5 Ra5 6.c4 b6 7.Nf3+= Ba6 8.a4 Nf6 9.d3 Be7? 10.Nc3 Bb5+= 11.Nb5 Nc6 12.Bb2 d5? 13.ed5 Nd4 14.Ne5 Nb5 15.ab5 Nd7 16.Nc6 Ra1 17.Qa1 Qc7 18.0-0 f6 19.Re1 0-0 20.Re7 h5 21.Qd1 g6 22.d4 Qf4 23.Rd7 Kh8 24.Ne7 Qg5 25.dc5 bc5 26.b6 Rb8 27.b7 Qg4 28.Qg4 hg4 29.Ng6 Kg8 30.Bf6 Re8 31.Rd8 (31...Rd8 32.Bd8 g3 33.b8Q gf2 34.Kf2 Kh7 35.Qc7 Kg8 36.Ne7 Kf7 37.Nf5 Kg6 38.Qd6 Kf5 39.Qe6 Kf4 40.g3; 31.Rg7) 1–0. willow27 – IrishBouncer, ChessWorld.net, 2005.

4.e4 ab5 5.Bb5 Qg5=.

4.Bb2 d6 5.c4 Bb7 6.e3 Nd7 7.Nf3 e4 8.Ng1 Ngf6 9.Ne2 Be7 10.Ng3 0-0 11.Nc3 Ne5 12.Qc2 Increases the pressure on e4 12...Nd3 (12...a6 13.Nce4 ab5 14.cb5+=) 13.Bd3+= ed3 14.Qd3 Bg2 15.Rg1 Bh3 16.Nf5 Bf5 17.Qf5 g6 18.h4 Qd7?? (18...h5 19.Rg6 fg6 20.Qg6 Kh8 21.Nd5+-) 19.Qd7 (better 19.Nd5 Qe6 20.Ne7 Qe7 21.Bf6+-) 19...Nd7+= 20.h5 Ne5 21.hg6 (better 21.Nd5 Rae8 22.Be5 de5 23.Ke2+/- (23.Ne7?! Re7 24.Ke2 Ra8=)) 21...Nf3 22.Kf1 (22.Ke2 Ng1 23.Rg1 fg6 24.Nd5=+) 22...Ng1 (better 22...fg6 23.Nd5 Nd2 (23...Ng1?! 24.Ne7 Kf7 25.Nd5=+) 24.Ke2 Nc4 25.Ne7 Kf7-/+) 23.gh7= Kh7 24.Kg1 (24.Nd5 Rg8 25.Ne7 Rg4+=) 24...Bf6 25.Kh2 (25.d4 Bg7 26.Nd5 Rac8=) 25...Rg8=+ 26.Rh1? (26.Rg1 Rg1 27.Kg1 Bg7-/+) 26...Kg7 (better 26...Rg4 27.Rg1 Rh4 28.Kg2 Rg8 29.Kf1 Rg1 30.Kg1 Rc4-+) 27.Kg2= Kf8 28.Kf3 Ke7?? (better 28...Bc3 29.Bc3 a6 30.ba6 Ra6=+) 29.Nd5+- Ke6 30.Nf6 Rg6 (30...Rh8 31.Nh5 f6 32.Nf4 Kf7 33.Rh5 Rh5 34.Nh5+-) 31.Nd5 Rag8 (31...Kd7 32.Rh7 Rf8 33.Bf6+-) 32.Nf4 Ke7 33.Ng6 Rg6 34.Rh8 Rg1 35.Ra8 Rb1 (35...Ke6 36.Ra7 Rb1 37.Bc3+-) 36.Ra7 Ke6 37.Bc3 Rb3 38.a4 d5 (38...f6 39.e4+-) 39.cd5 (39.Ra6 Kd7 40.cd5 Rb4+-) 39...Kd5 40.Rf7 Ra3 41.Ra7 Kd6 (41...Kc4 42.e4 Ra2+-) 42.Ke4 Ra2 43.f4 Rc2 44.Be5 (44.Be5 Ke6 45.f5) 1-0. kaalmakreel (2140) - lytsbigjin (2040), ChessWorld.net, 2018.

4.Bb2 d6 5.d3 Nf6 6.Nd2 Bb7 7.Ngf3 Be7 8.c4 a6 9.a4 0-0 10.e3 ab5 11.ab5 Nbd7 12.Be2 Ra1 13.Ba1 Qc7 14.e4 Ra8 15.Bb2 Nf8 16.0-0 h6 17.Qc2 Ne6 18.Nb3 Qd8 19.Rb1 Nd4 20.Nbd4 ed4 21.Qc1 Nd7 22.Ra1 Ne5 23.Ra8 Qa8 24.Ne1 Bc8 25.h3 f5 26.f4 Nf7 27.Bf3 fe4 28.Be4 Bb7 29.Bb7 Qb7 30.Qa1 Bh4 31.Nf3 ½–½. Schalkwijk,Peter – Reede,Arvo, RL–2007–0-00140, 2008.

4.a4 d5 5.Bb2 Bd6 6.Nf3 f6 (6...Nd7 7.e3=+) 7.e3 (7.Nc3 Ne7 8.e4=) 7...Ne7=+ 8.Be2 0-0 9.0-0 Be6 10.d3 cd3 11.cd3 (11.Qd3?? e4 12.Qd1 ef3 13.Bf3 Nd7-+) 11...Nd7 12.e4 d4 13.Ba3 Nb6 14.Bd6 Qd6 15.Na3 Na4?? (better 15...Rac8-/+) 16.Qa4+- Rfc8 17.Rac1 Rc1 18.Rc1 Rc8 19.Rc8 Nc8 20.h3 Nb6? (20...Qc5+-) 21.Qa7 Nd7 22.Nc4 Bc4 23.dc4 d3 24.Bf1 d2 25.Nd2! Qd2 26.Qb7 (better 26.c5 Qd4 27.Qa8 Kf7 28.Qb7+-) 26...Nc5 (26...Qd4+-) 27.Qc6 Ne4 (27...Nd7 28.c5 h6+-) 28.Qd5 (28.Qe8) 28...Qd5+- 29.cd5 Nd6? (29...Nc5 30.b6 Kf7+-) 30.b6 Kf7 31.Ba6 Ke7 32.b7 Nb7 33.Bb7 Kd6 34.Bc6 g6 35.f3 f5 36.Kf2 h6 37.Ke3 g5 (37...Kc5 38.Kd3+-) 38.g3 Kc5 (38...h5 39.g4 hg4 40.hg4 fg4 41.fg4 e4 42.Ke4 Kc5 43.Kd3 Kd6 44.Kd4 Kc7 45.Ba8 Kd6 46.Ke4 Kc5 47.Ke5 Kb5 48.d6 Kb4 49.Be4 Ka5 50.d7 Kb5 51.d8Q Kc4 52.Qa5 Kb3 53.Kd4 Kb2 54.Qa4 Kc1 55.Qc2) 39.g4 f4 40.Ke4 Kd6 41.Kf5 Kc5 42.Ke5 (42.Ke5 h5 43.gh5 Kb4 44.h6 Kc5 45.h7 g4 46.hg4 Kc4 47.h8Q Kd3 48.d6 Ke2 49.d7 Kf2 50.Qh2 Ke3 51.Qb2 Kd3 52.Bb5 Ke3 53.Qe2) 1-0. Shehewho (2030) - batyaiktat (2065), Rated Bullet game, lichess.org, 2015.

4.e4 Qa5 5.Bc4+/– Bb4?? 6.Qh5+- g6 (6...Kd8 7.Qf7 Ne7+-) 7.Qe5 (7.ab4?! Qa1 (7...gh5?? 8.ba5 Nf6 9.Nc3+-) 8.Qf3 f5= (8...Qb1? 9.Qf7 Kd8 10.Qf8 Kc7 11.Kd1+-)) 7...Kf8 8.ab4 Qb4 9.Ba3 Qa3 10.Ra3 f6 11.Qd5 (11...Ke7 12.Qf7 Kd6 13.Qf8 Ne7 14.Qf6 Kc7 15.b6 ab6 16.Nc3 d5 17.Qe7 Bd7 18.Nd5 Kc8 19.Qd6 Kd8 20.Ra8 Re8 21.Rb8) 1–0. mtr – stgtyr, internet, 2009.

4.e4 Qa5 5.Bc4+/– Qc7 6.d3 Nf6+/– 7.Nc3 Bc5 8.Nf3 d6 9.0-0 Be6.

4.e4 Qa5 5.Bc4+/– Qc7 6.Bd5 Nf6 7.Nc3 Bc5 8.Nf3 0-0 9.0-0 d6.

4.e4 Qa5 5.Bc4+/– Qc7 6.Qe2 Bc5 (6...a6 7.ba6 ba6 8.Nf3 Nf6 9.d4 Nc6) 7.Nf3 Nf6 8.Bb2 d6 9.d4 ed4.

4.e4 d5 5.ed5 Qd5 6.Nc3 Qd4 7.Nf3 Bg4 (7...Qc5 8.Qe2 Bg4 9.Qe5 (9.Qc4?! Bf3 10.gf3 Nd7+/–) 9...Kd8 10.Ne4+-) 8.Be2 (better is 8.Nd4 Bd1 9.Ne6 fe6 10.Nd1+-) 8...Bf3 9.Bf3 (< 9.gf3 Bc5 10.Rf1 a6–/+) 9...Bc5 (9...Qd7 10.Qe2 Qc7 11.Nd5+-) 10.0-0+- Nf6?? (better is 10...Nd7 11.Bb7 Rb8+/–) 11.Bb7 Ng4 12.Qe2 0-0 13.Ba8 Qf4 14.Qf3 Nf2 15.Rf2+- Re8 16.d4 Qd4 17.Bb2 e4 18.Be4 a6 19.ba6 Na6 20.Rd1 Qe5 21.Qf7 Kh8 22.Qf5 Bf2 23.Qf2 Qh5 24.Bf3 Qa5 25.Qd4 h6 26.Ne4 Rg8 27.Nf6! Rb8 28.Nh5 Rg8 29.Ng7 Qc5 30.Nf5 Qd4 31.Rd4 Rb8 32.Bc3 Rb1 33.Rd1 (33...Kg8 34.Rb1+-) 1–0. willow27 – monkfist, ChessWorld.net, 2005.

4.e4 d5!? 5.Qe2 Be6 6.ed5 Qd5 +=.

4.Bb2 Bd6 5.e3 Bf5 6.a4 (6.c4 d4=+) 6...Nf6-/+ 7.d3 Nbd7 8.Be2 0-0 9.Nd2 Re8?? (9...Qa5 10.Ngf3-/+) 10.c3?? (better 10.g4 Be6 11.g5+/-) 10...e4 11.d4 c4 (11...Be6 12.c4-/+) 12.Ba3 (12.g4 Be6 13.g5 Nh5 14.Bh5 Qg5=) 12...Bc7 (better 12...Ba3!? 13.Ra3 Qe7=+) 13.g4+= Bg4 (better 13...Be6!? 14.g5 Nh5 15.Bh5 Qg5+=) 14.Bg4+/- Ng4 15.Qg4 Nf6 16.Qg2 Ba5 (16...a6!? 17.Ne2 ab5 18.ab5 Bd6+/-) 17.Ne2+- Qd7 (17...Re6 18.Rg1 Ne8 19.Qg5+-) 18.h3 (18.Rg1!? g6+-) 18...a6+/- 19.Rg1 Do you see the mate threat? 19...g6 20.Qg5 Kg7 (20...Bd8 21.Nf4+/-) 21.h4 (21.Ng3!? Qe6 22.Nf5 Kh8 23.Nd6 Bc3 24.Ne8 Ne8 25.Rb1+-) 21...h6+/- 22.Qg3 Nh5 (22...ab5 23.ab5 Bc7 24.Nf4+=) 23.Qg4 (23.Qg2 ab5 24.ab5 Bc7+/-) 23...Qg4 24.Rg4 f5 (24...Bd8 25.b6+/-) 25.Rg1 Bd8 26.Bb2 (26.ba6!? Ra6 27.Ng3 Ng3 28.fg3+=) 26...Bh4 (26...ab5 27.ab5 Ra1 28.Ba1 Bh4 29.Kf1=+) 27.Ng3 (27.b6 f4 28.Nf1 f3=) 27...Bg3 28.fg3 ab5 29.a5? (29.ab5 Ra1 30.Ba1 Ra8-/+) 29...Nf6 (29...Ra6!?-/+) 30.Ba3 Ng4 (better 30...Ra6!?=+) 31.Ke2+= Kh7 (31...Kf7 32.Bc5+=) 32.Bc5 g5 (32...b4 33.Bb4 Ra6 34.Bc5+/-) 33.Rgf1 (33.Rgb1 Red8+/-) 33...Kg6 (33...b4 34.Rf5 bc3+/-) 34.Bb6 (34.Rfb1!? Rg8 35.Rb5+/-) 34...Rf8 (34...b4!? 35.cb4 Nf6+=) 35.Rab1+/- f4 (better 35...Rf7!?+/-) 36.ef4+- gf4 37.Rf4 Rf4 38.gf4 Kf5 (38...b4 39.Rb4 Rc8+-) 39.Rb5 Kf4 (39...Ke6 40.f5 Kd6 41.Bc5 Kc7 42.Bb4+-) 40.Bc7 (40.Bc7 Kf5 41.Rd5 Ke6 42.Rb5+-) 1-0. petrobbo (2070) - kaalmakreel (2200), ChessWorld.net, 2014.

4.e3 Bd6 5.c4 Be6 6.cd5 Bd5 7.Nc3 Be6 8.Nf3 h6 9.Qc2 Nf6 10.Bb2 Nbd7 11.Ne4 Ne4 12.Qe4 e5 becomes the focus of attention 12...Qc7 13.h3 0-0 14.Bc4 Bc4 15.Qc4 Nb6 16.Qc2 Rae8 17.d3 f5 Black plans e4 18.Rc1 Qd7 19.a4 e4 20.Nd2 ed3 21.Qd3 c4 22.Qd4 Qe7 (22...Rd8 23.a5 Qf7 24.Qg7 Qg7 25.Bg7 Kg7 26.ab6+=) 23.Nc4 (23.a5 Bc5 24.Qg7 Qg7 25.Bg7 Kg7 26.ab6 Bb6 27.Nc4 Bc5+/–) 23...Nc4 (better is 23...Bb4!? 24.Ke2 Na4=) 24.Qc4 Kh8 25.0-0 Qg5 26.Qd5 Qe7 27.Rfd1 Rd8 28.Qf3 Bc7 29.Rd8 Bd8 30.Qf4 Kh7 31.Bd4 b6 32.Rc6 Qf7 33.Qd6 Re8 34.f4 Kg8 35.Rc8 Bf6 36.Rc7 (better is 36.Qb8! Kf8+-) 36...Re7 37.Qd8 Kh7 38.Re7 Qe7 39.Qe7 Be7 40.Kf2 Bd6 41.g4 g6 42.Kf3 Kg8 43.e4 fe4 44.Ke4 Kf7 45.Be5 Be7 46.Bb8 Ke6 47.Ba7 Bd8 48.Bb8 Be7 49.Bc7 Bc5 50.Be5 Be7 51.f5 gf5 52.gf5 Kd7 53.Kd5 Bb4 (53...Bg5 54.Bd4 Kc7 55.f6+-) 54.Bf6 (better is 54.f6 h5+-) 54...Bd2 55.Bd4 (55.Bd4 Kc7 56.f6+-) 1–0. combijack (1815) – peeuukoo (1870), gameknot.com, 2013.

4.e3 Be6 5.Bb2 Bd6 6.Be2 (6.Nf3 Nd7=+) 6...Nf6 7.Nf3 Nbd7 8.Ng5 (8.d4 e4 9.Ne5 c4–/+) 8...Bf5–/+ 9.g4 (9.0-0 e4–/+) 9...Bg6 10.h4 h6 11.Nh3 Ne4 (11...Nb6 12.h5 Bh7 13.a4–/+) 12.d3 (12.Bf3 Qb6 (12...Qh4?! 13.d3+=) 13.a4 c4–/+) 12...Qa5 13.Kf1 (13.Nd2 Nd2 14.Qd2 Qb5–/+) 13...Nef6 (13...Qb5!? 14.Ra2 Nef6–+) 14.a4 (14.c4 dc4 15.dc4 Bc7–/+) 14...d4 (14...0-0-0 15.Kg2–/+) 15.Qd2 (15.h5 Bh7=+) 15...Qc7 (15...Qb6 16.Ke1–/+) 16.Na3 (16.Ke1 0-0-0–/+) 16...Nb6 17.a5 Nbd5 (17...Na4!? 18.Bc1 Nc3–/+) 18.Nc4=+ Qd7 (18...Bh7 19.e4 Nb4 20.c3 dc3 21.Bc3=) 19.e4 Ne7 (19...Nc7 20.h5 Bh7 21.b6=) 20.f3 (better 20.h5 Bh7 21.g5+=) 20...Qc8?? (better 20...Nc8=+) 21.b6 (better 21.Nd6 Kd7 22.Nc8 Kc8 23.h5+-) 21…a6?? (better 21...Qc6=) ½–½. Buck,Klaus_Michael – Ziltener,Werner, 34th Festival Internazionale, 2012.

4.e3 Nf6 5.Bb2 Bd6 6.d3 (6.Nf3 Qe7–/+) 6...0-0 7.Be2 (7.Nf3 Nbd7–/+) 7...Qa5 8.Qd2 (8.Bc3 Qa4–/+) 8...Qb5–+ 9.c4 dc4 10.dc4 Qb3 (10...Qd7 11.Nf3 e4 12.Ng5–+) 11.Bd1 (11.Nf3 Nc6–+) 11...Qb6 12.Nc3 (12.Nf3 Rd8–+) 12...Be6 13.Nd5 (13.Be2 Rd8–+) 13...Nd5 14.cd5 Bd5! 15.Nf3 (15.Qd5 Qb2) 15...Nc6 16.0-0 Bc4 17.Re1 Rad8 18.Qc3 Qa6 19.Nd2 Be6 20.Be2 Qa4 21.Red1 Be7 22.Nf3 f6 23.Nd2 Rd6 24.Nc4 Rd1 25.Rd1 Rd8 26.Rd8 Nd8 27.h3 b5 28.Ne5 fe5 29.Qe5 Bf8 30.Qb8 Qc2 31.Qb5 a6! (32.Qa6 Qb2–+) 0–1. Lindner,Jan Joost – Cheiron, The Hague AEGON, 1997.

4.e3 Nf6 5.c4 Be6 6.Qa4 (6.cd5 Nd5 7.Qf3 Nd7=+) 6...Nbd7–/+ 7.Nc3 (7.Qc2 Bd6–/+) 7...Nb6 8.Qc2 Nc4 9.Bc4 (9.Nf3 Qd6–/+) 9...dc4 10.Nf3 Bd6 11.0-0 0-0 (11...a6 12.Ng5 Bd7 13.Rb1–/+) 12.h3 (12.Ng5 Qd7–/+) 12...Qd7 13.Ng5 h6 (13...Rfd8 14.Nce4 Ne4 15.Qe4–/+) 14.Ne6 Qe6 (14...fe6?! 15.Qa2=) 15.Ne4 Be7 (15...Ne4 16.Qe4 b6 17.Bb2–/+) 16.Nf6 (16.Bb2 Rad8–/+) 16...Bf6 (worse 16...gf6 17.e4=+; 16...Qf6?! 17.Qc4 e4 18.Rb1=) 17.e4 (17.Bb2 a6–/+) 17...Rfd8 18.Bb2 Rd7 (18...a6 19.ba6 Ra6 20.a4–+) 19.Bc3 (19.Rac1–/+) 19...Qb6 (19...Bg5 20.Rfd1–/+) 20.a4 (20.Qa4!?=+) 20...Rad8 (20...Rd3 21.Bb2–/+) 21.Qa2 (21.Rac1 Bg5–/+) 21...Qe6 22.Rac1 b6 (22...Bg5 23.Rfd1–/+) 23.a5 Bg5 24.Rc2 ba5 (24...Bf4 25.Qb2–/+) 25.Ba5 Rb8 26.Qa4 (26.Rb1 Rdb7 27.Rcb2 a6 28.ba6 Rb2 29.Rb2 Rb2 30.Qb2 Qa6=+) 26...Rdb7–/+ 27.Rb1 (27.Rb2–/+) 27...Bf4 (better 27...Qd7!?–/+) 28.Rc4= Qd6 29.Rc2 (29.g3 Bg5 30.Bc3=+) 29...a6 (better 29...Qd3 30.g3 Rb5–/+) 30.g3?? (better 30.b6+=) 30...ab5–+ 31.Qa2 (31.Qb3 Bg5–+) 31...Bg5 32.h4 (32.Qb3 b4–+) 32...Bd8 (32...Be7 33.Qb3–+) 33.Bd8 Qd8?? (better 33...Rd8 34.Qa5 Rdb8–+) 34.Rc5= Qd6 (34...Qe8 35.Qb2 f6 36.d4 ed4 37.Qd4=) 35.Rd5 (35.Qd5 Qd5 36.Rd5 b4 37.Re5 b3+=) 35...Qe6 36.Qa5 Increasing the pressure on the isolated pawn on b5 (36.Qa1 f6=) 36...Qe8 37.Qb4 Qc6 (37...Rb6!?=) 38.Re5+- Qc4 (38...Rd8 39.d4+-) 39.Qc4 bc4 40.Rb7 Rb7 41.Rc5 Rb4 42.Kf1 Kf8 43.Ke2 Ke7 44.d4 (44.Rc7 Ke6+-) 44...cd3 45.Kd3 Kd6 46.Rd5 Ke6 47.f3 g6 48.g4 Rb1 (48...Rb3 49.Ke2+-) 49.Ra5 Rd1 (49...Rb3 50.Ke2+-) 50.Ke3 (50.Ke2 Rb1+-) 50...Rh1 (50...Re1 51.Kf2 Rb1 52.h5+-) 51.h5+- Kf6 (51...Ke7 52.Ra7 Kf6 53.Ra6 Kg7 54.hg6 fg6 55.f4+-) 52.Kf4 (52.Ra6 Kg7 53.hg6 fg6 54.Ra7 Kf6+-) 52...Rh4 (52...g5 53.Ke3+-) 53.hg6 (53.e5 Kg7 54.e6 fe6 55.Ra7 Kf6+-) 53...fg6 (53...Kg6 54.Rh5! Rh5 55.gh5 Kh5 56.Kf5+-) 54.Ra6 Kg7 55.Kg3 (55.Ke5 Rh3 56.Ra7 Kg8+-) 55...Rh1 56.Ra5 (56.Ra7 Kf6+-) 56...Kf7 (56...g5 57.Kg2 Rb1 58.Ra7 Kf6 59.Ra6 Kg7 60.Rd6+-) 57.Ra2 (57.f4 Rg1 58.Kf3 Rf1 59.Ke3 Re1 60.Kd3 Rd1 61.Ke2 Rg1+-) 57...Rg1 (57...Rc1 58.Ra7 Ke6 59.Rh7+-) 58.Kf4 (58.Kf2 Rh1 59.Ra7 Ke6+-) 58...Rf1 59.Rh2 Kg7 60.Re2 (60.e5 Re1+-) 60...Kf6 (60...g5 61.Ke3+-) 61.e5 (61.Rd2 g5 62.Kg3 Rc1+-) 61...Ke6 62.Rh2 g5 63.Ke4 (63.Kg3 Rg1 64.Kf2 Rc1 65.Rh6 Ke5+-) 63...Re1+- 64.Kd4 Rd1 65.Ke4 (65.Ke3 Re1 66.Kf2 Re5 67.Rh6 Kf7+-) 65...Re1 66.Kd4 Rd1 67.Ke3 Ke5 (67...Re1 68.Kf2 Re5 69.Rh6 Kf7 70.Ra6+-) 68.Rh6+- Rc1 (68...Rb1 69.Rg6 Rb3 70.Kf2+-) 69.Ra6 (69.Rg6 Rc3 70.Kf2 Rc5 71.Rg5 Kf4+-) 69...Rc3+- 70.Kf2 Kf4? (70...Rc5 71.Rg6+-) 71.Ra4?? (better 71.Rf6 Ke5 72.Rf5 Ke6 73.Rg5 Rc2 74.Kg3+-) 71...Ke5+- 72.Kg3 Kf6 73.Ra5 Re3 74.Rf5 (74.Kf2 Rc3+-) 74...Kg6 75.Kf2 (75.Rc5 Rb3+-) 75...Re6 (better 75...Rc3+-) 76.f4 (76.Rc5!?+-) 76...gf4= 77.Rf4 (77.Kf3 Re1=) 77...Kg5 (77...Rf6 78.Rf6 Kf6 79.g5 Kf7 80.g6 Kf8 81.g7 Kg8 82.Kf3=) 78.Ra4 Rf6 79.Kg3 Rb6 (better 79...Ra6! 80.Rb4 Ra3 81.Kf2 Ra2 82.Kf3 Ra3 83.Ke2 Rg3=) 80.Ra5+- Kg6 81.Kh4 Rb1 (better 81...Rd6+-) 82.g5?? (better 82.Ra6 Kg7 83.Kh5+-) 82...Rh1= 83.Kg4 Rg1 84.Kh4 (84.Kf4 Kh5=) 84...Rh1 85.Kg4 ½–½. Lee Wing Kin – Qian,Christopher, Hong Kong Open, 2016.

4.e3 Nf6 5.d4 cd4 6.ed4 Bd6=+.

4.e3 Nf6 5.Nf3 e4 6.Ng1 b6 7.Bb2 Bd6 8.Be2 Qe7 9.a4 Bb7 10.Nh3 h6 11.d3 Nbd7 12.Nd2 Be5 13.Qc1 0-0 14.0-0 Rac8 15.de4 Ne4 16.Ne4 de4 17.Nf4 Rfd8 18.Bc4 Bb2 19.Qb2 Qe5 20.Qb3 Qf5 21.h3 Ne5 22.Be2 g5 23.Nh5 Qg6 24.Qc3 Nf3 25.Bf3 ef3 26.Nf6 Kf8 27.g3? (27.gf3 Bf3 28.Qe5=+) 27...h5?? (better 27...Rd6 28.Ng4 f6-/+) 28.Rad1 Qf5 29.g4 hg4 30.hg4 Qg6?? (better 30...Qe6 31.e4 Be4=) 31.Qe5+- Qh6? (better 31...Re8 32.Qd6 Kg7 33.Ne8 Re8 34.Qg6 Kg6+-) 32.Qg5?? (better 32.Nd7 Kg8 33.Rd6+-) 32...Qh3 (32...Qg5 33.Nh7 Ke7 34.Ng5 Rh8-+) 33.Rd8+- Rd8 34.Nh7!! Ke8 (34...Qh7 35.Qd8 Discovered attack) 35.Qe5 Kd7 36.Rd1 Kc8 37.Rd8 (37.Qf5 Kc7 38.Qf7 Kb8 39.Rd8 Bc8 40.Qf4 Kb7 41.Qe4 Kb8 42.Qe5 Kb7 43.Qe7 Kb8 44.Qd6 Ka8 45.Rc8 Kb7 46.Rb8) 37...Kd8= 38.Qd6 Kc8 39.Qf8 Kc7 40.Qf7 Kb8 41.Qf8 Kc7 42.Qf4 Kc8 43.Qf8 Kc7 44.Qe7 Kc8 45.Qe8 Kc7 46.Qe5 Kc8 47.Qe8 Kc7 48.Qe5 Kc8 49.Qe8 ½-½. azer3136 (2305) - elRope (2320), Rated Blitz game, lichess.org, 2016.

4.Nf3 e4-/+ 5.Ng1 Nf6 6.e3 Bd6 7.f4 (7.Bb2 0-0-/+) 7...0-0 8.h3 Nbd7 9.Be2 (9.Bb2 Nb6-/+) 9...a6 10.a4 c4 (10...d4 11.Bb2-/+) 11.Nc3 (11.Bb2 Nc5-/+) 11...Nc5 12.a5? (12.Bb2 ab5 13.ab5 Ra1 14.Qa1 Ne6-/+) 12...ab5 (12...d4 13.ed4 Bf4 14.Bc4 Bg3 15.Kf1 Qd4 16.Qe2-+) 13.Nb5 Be7 14.d3? (better 14.Nd4-+) 14...cd3 (14...ed3 15.cd3 Nb3 16.Bd2 Na1 17.Qa1-+) 15.cd3 Ra5 16.Na3 (16.Rb1 ed3 17.Bd3 Nd3 18.Qd3 Ne4-+) 16...d4 (16...ed3 17.Bd3 Nfe4 18.Ne2 Nd3 19.Qd3 Bb4 20.Kf1-+) 17.de4 (17.ed4 Nd3 18.Bd3 Bb4 19.Kf1 Qd4 20.Be2 Qa1 21.Nc2-+) 17...d3 18.Bf3 Nfe4 (worse 18...Nce4 19.g3 Ba3 20.Ba3 d2 21.Kf1 Qd3 22.Kg2 Ra3 23.Ra3 Qa3 24.Ne2-+) 19.Bd2 (19.Be4 Ne4 20.Nf3 Bb4 21.Kf1 d2 22.Bd2 Qd3 (22...Ba3?! 23.Ba5 Qa5 24.Qb3-/+) 23.Kg1 Nd2-+) 19...Bh4 20.Kf1 (20.g3 Bg3 21.Kf1 Nd2 22.Qd2 Nb3-+) 20...Ng3 21.Kf2 Nh1 22.Kf1 Ng3 23.Kf2 Nge4 (better 23...Qf6 24.Rb1 Ra3 25.Bd5-+) 24.Kf1 Nd2 25.Qd2 Nb3 26.Qd1 Na1 27.Qa1 Qe7 28.Bd1 Qe3 (28...Qe3 29.g3 Bg3 30.Qa2 d2 31.Qd2 Qd2 32.Be2 Qe1 33.Kg2 Qf2 34.Kh1 Qh2) 0-1. olo (2350) - algernon (2560), net-chess.com, 2022.

4.Bb2 d6 5.e3 Bd7 (5...a6 6.Nc3=+) 6.c4 (6.Nc3 d5 7.Qf3 Be6=+) 6...a6 7.a4 Be7 (better 7...ab5 8.ab5 Ra1 9.Ba1 Bf5=) 8.d4 (better 8.Nc3!?=) 8...ed4 (8...cd4!? 9.ed4 0-0–/+) 9.ed4 0-0 (9...ab5 10.cb5 d5 11.Be2=+) 10.Be2=+ ab5 11.cb5 Ne4 (11...Qa5 12.Bc3 Qc7 13.Nf3=+) 12.Bf3 (12.Nf3 Qa5 13.Nbd2 Re8=) 12...Bf5 (12...Qa5!? 13.Nd2 d5 14.Be4 de4=+) 13.Ne2= Qa5 (13...Re8 14.Nbc3 Bf6 15.0-0=) 14.Kf1 (14.Nbc3!? Nd7 15.0-0+=) 14...Qb4 (better 14...Nd7!?=+) 15.Bc3= Nc3 (15...Qc4 16.Be4 Be4 17.Nd2=) 16.Nbc3+= Be6 (16...Re8 17.dc5 dc5 18.Bb7=) 17.Rb1 (17.Bb7 Ra7 18.Bd5 Nd7+=) 17...Qa5 18.Bb7 Ra7 19.Be4 (19.Bd5 Nd7+=) 19...cd4 (19...Nd7 20.Rc1=) 20.Nd5 White prepares the advance b6 (20.b6 dc3 21.ba7 Qa7 22.Nc3 Nd7+-) 20...Bd5 21.Bd5 Qa4 (better 21...d3 22.Qd3 Nd7+-) 22.b6 (22.Nd4!? Bf6 23.Nf5+=) 22...Ra5 (22...Qd1 23.Rd1 Ra5 24.Bf3=) 23.Qa4+= Ra4 24.b7 Ra5 (24...Bf6 25.Nf4+=) 25.Be4 (25.Bf3 d3 26.Nf4 d2+=) 25...d5= 26.Bd3 ½–½. Lee Wing Kin – Uppal Tejpal Singh, Hong Kong Open, 2016.

4.c4 d5 5.cd5 Nd5 6.Bb2 Bd6 7.Nc3 Nc3 8.dc3 0-0 9.e4 Be6 10.Nf3 a6 11.c4 ab5 12.cb5 Qa5 13.Qd2= Qd2 14.Nd2 Ra4 15.Rc1 Nd7 16.Bc4 Nb6 17.Be6 fe6 18.0-0 Ra5 19.Nf3 Rb5 20.Be5 Be5 21.Ne5 Rc8 22.Nc4 Nc4= 23.Rc4 Ra8 24.a4 Rb4 25.Rc5 Re4 26.Rb5 Ra7 27.Rc1 Rea4=+ 28.Rc8 Kf7 29.g3 Rd4 30.Rc7= Kf6 31.Kg2 (31...h6 32.Rcb7 Rb7 33.Rb7=). Bulcourf,Carlos (2295) – Moreda,Lucas (1965), Buenos Aires op3, 1993.

4.c4 d5 5.g3 dc4 6.Bg2 Bd6 7.Nc3 0-0 8.Nf3 e4 9.Ng5=+ b6?? 10.Nge4+- Be7 11.Nf6 Bf6 12.Ba8 Be6 13.0-0 Nd7 14.Be4 Ne5 15.d3 cd3 16.ed3 c4 17.d4 Nd3 18.Be3 Bh3 19.Bg2 Bg2 20.Kg2 a5 21.Ne2 Qd5 22.Kg1 Qb5 23.Nc3 Nb2 24.Nb5 Nd1 25.Rfd1 a4 26.Nc3 b5 27.Nb5 c3 28.Nc3 h6 29.Na4 Be7 30.Nc5 Bc5 31.dc5 f5 32.c6 h5 33.c7 Rc8 34.Rd8 Rd8 35.cd8Q Kh7 36.Bd4 g5 37.Qh8 Kg6 38.Qg7# 1–0. gdraper (2035) – ajeffries (1645), net–chess.com, 2006.

4.bc5 Bc5 5.d4 ed4 6.cd4 Be7=.

4.bc5 Bc5 5.f3 d5 6.e3 =+.

4.bc5 Bc5 5.f3 Bg1 6.Rg1 Qh4 7.g3 Qh2 8.Rg2 Qh5 9.d3 Nf6 10.d4 d6 11.g4 Qh4–/+ 12.Rf2 e4 13.e3? ef3–+ 14.Qf3 Ng4 15.Qf7 Kd8 16.Kd2?? Qf2 17.Kd3 Qf7 18.a4 Qf1 19.Kc2 Bf5 20.Kb3 Qc1 (21.e4 Be4 22.Na3 Qa1 23.Nb1 Qb1 24.Ka3 Bc2 25.c4 Qb3; 20...Qd1 21.Kb2 Qc2 22.Ka3 Qc1 23.Ka2 Be6 24.d5 Bd5 25.c4 Bc4) 0–1. esko – heyuneverno, net–chess.com, 2001.

4.d4 Nc6 5.dc5 (5.b5 Na7 6.de5 Nb5+=) 5...Qf6 (5...ab4!? 6.cb4 Nb4 7.ab4 Ra1=+) 6.e4 (6.Bd2 d5+=) 6...d6 (6...ab4 7.cb4 d6 8.b5+=) 7.cd6 (7.b5 Nb8+/–) 7...Bd6 (7...ab4 8.cb4 Nb4 9.Bb5 Nc6 10.Ra2 Bd6 11.Rd2=) 8.Nf3 (Better is 8.b5!? Bc5 9.Nf3+/–) 8...ab4= 9.Bg5 (9.Bb2 ba3 10.Na3 Nge7=) 9...Qe6 (9...Qg6 10.a4–/+) 10.Bb5 Ra5 (Better is 10...Nf6=+) 11.Bc6+/– bc6 12.cb4 Ra7 13.0-0 Qg6? (Better is 13...Nf6 14.Nbd2 0-0+/–) 14.Ne5!!+- Be5 (14...Qe6 15.Nc6 Rd7+-) 15.Qd8 1–0. rookie2 – Seanypop, ChessWorld.net, 2004.

4.d4 cd4 5.b5 =+.

4.ab4 Nc6 5.Nf3 (5.d4 ed4 6.b5 Nce7 7.Qd4 a5=) 5...f6 (5...e4 6.Ng1=+) 6.d3 (6.e4 d5 7.ed5 Qd5=) 6...b6 (6...d5 7.e3=) 7.e3 (7.e4 d5+=) 7...Bb7 (7...d5 8.b5 Na5 9.Qa4=) 8.Be2 (8.b5 Na5+=) 8...Nh6 (8...d5 9.0-0+=) 9.Qb3 (9.b5 Ne7+=) 9...Bd6 (9...a5 10.b5 Ne7 11.0-0+=) 10.Nbd2 (10.e4 Nf7+/–) 10...Qe7 (10...a5 11.b5 Ne7 12.e4+=) 11.Ne4 (11.Nc4 b5 12.Nd6 Qd6+/–) 11...Nf5 (11...Nf7 12.0-0+=) 12.Bd2 (12.0-0 a6+/–) 12...Bc7 (12...a6 13.0-0+=) 13.0-0 (13.c4 Nd6+=) 13...Qe6 (13...a6+=) 14.Qb2 (14.c4 0-0+=) 14...0-0 (14...d5 15.b5 de4 16.de4–/+) 15.b5 (15.c4 a6+=) 15...Nce7 16.c4 d5 17.Nc3 (17.cd5 Nd5 18.Rfc1 Rfc8=) 17...d4 (17...dc4 18.Qa2=) 18.ed4 (18.Nd5 Nd5 19.cd5 Qd7= (< 19...Bd5 20.e4+/–)) 18...ed4 (18...Nd4!? 19.Rfe1 Bf3 20.Bf3 Nf3 21.gf3 Qd7=+) 19.Ne4= Be4 20.de4 Qe4 21.Rfe1 d3 22.Bd1 Qb7 23.Bb3?? Kh8= 24.Rad1 Rad8=+ 25.Be3 Ne3 26.Re3= Nf5 27.Red3+= Rd3 28.Rd3 Qe4 29.Rd7 Re8 30.Rd1 Nh4=+ 31.Qc3? Nf3–/+ 32.gf3 Qg6 33.Kf1?? Bh2 (34.Qe3 Re3 35.fe3 Qg1 36.Ke2 Qg2 37.Kd3 Qf3–+) 0–1. mic (2180) – ioanmacea (1845), net–chess.com, 2006.

4.ab4 d5 5.Bb2 Nc6 6.g3 Be6 (6...Nf6 7.Bg2=+) 7.d3 (7.Bg2 Nf6=+) 7...Bd6 (7...Nf6 8.Bh3=+) 8.b5=+ Nce7 9.Qa4 (9.Ba3 Nf6–/+) 9...Nf6–/+ 10.b6 (10.Bg2!?–/+) 10...Bd7 11.Qb3 ab6 (11...a5 12.Ba3 Ba3 13.Na3–/+) 12.Ra8 Qa8 13.Qb6 (13.Bg2 Qa5–/+) 13...0-0 (better is 13...Qa2 14.Nd2 Ba3 15.Ba3 Qa3–/+) 14.Qd6 Qa2 15.Na3?? (better is 15.Qa3 Qb1 16.Bc1–/+) 15...Qb2–+ 16.f3 d4 17.cd4? ed4?? 18.Qe7+= Qc1 19.Kf2= Re8 20.Qb4 Qe3?? 21.Kg2+- Nd5 22.Qb7 Qe6 23.g4 Ne3=+ 24.Kf2 Ng4 25.Ke1 Bc6 26.Qb2= Qd6?? 27.Nc4 Qf6+/– 28.Bh3?? Bf3 29.Nf3= Qf3 30.Rf1 Qh3–+ 31.Nd6?? Rf8 32.Qd4?? Nh2 33.Rf4 Qg3 34.Kd2 Qg2 35.Nf5 Re8 36.Ne3 Qg5–/+ 37.Qc4 Qe7?? 38.d4?? Qe3–+ 39.Kc2 Qf4 40.Kc3 Qc1 41.Kd3 Qc4 (42.Kc4 Ng4–+; 41...Re3) 0–1. cloc – wbartier (1905), net–chess.com, 2005.

4.ab4 d5 5.d4 ed4 6.Qd4=.

4.ab4 Nf6 5.d3 d5 6.e3 Be7 7.Bb2 Bf5 (7...Nc6 8.Nf3+=) 8.Nf3 e4 (better is 8...0-0!?+=) 9.de4+= Be4 10.Nbd2 0-0 11.Ne4 Ne4 (11...de4 12.Nd4+=) 12.Ra5 Nf6 13.Bd3 b6 (13...Nc6 14.Ra4+=) 14.Ra4+/– Nc6 15.b5 Na5 16.0-0 Bc5 (16...Qc7 17.Nd4+/–) 17.Rh4 (17.Qc2 Qe7+/–) 17...Nc4 18.Bc4 dc4 19.Qa4 h6 20.Rc4 Re8 21.Rf4 Nd5 (21...Bd6 22.Rd1 Qe7 23.Rh4+/–) 22.Rd1 Re3? (better is 22...Re6 23.Nd4 Rd6+/–) 23.c4+- Re2 24.Rd5 Bf2 (24...Qc7 25.Be5 Re8+-) 25.Kf1 Qe8 (25...Qe7 26.Bg7 Qe3 27.Qd1 (27.Bh6?? Re1 28.Ne1 Qe1) 27...Qf4 28.Qe2 (worse is 28.Ke2 Qe3 29.Kf1 Kg7+-) 28...Kg7 29.Kf2+-) 26.Bg7! Bc5 (26...Kg7 27.Qa1 Pinning) 27.Ne5 Kg7 (27...Rf2 28.Rf2 Bf2+-) 28.Ke2 f6 29.Qa1 (29.Qa1 Qe6 30.Kf1+-) 1–0. marektheim – w.horse 777, internet, 2015.

4.cb4 Nc6 5.e4 Qb6 (5...Nf6 6.Nc3+=) 6.Nf3 a5 7.Be2 (better is 7.b5!? Nd4 8.Nc3 Nf3 9.Qf3+=) 7...ab4+= 8.a4 Bc5 9.0-0 Nf6 10.Re1?? (better is 10.d3–/+) 10...Bf2–+ 11.Kh1 (11.Kf1 Be1 12.Qe1 Nd4–+) 11...Be1 12.Qe1 Ne4 13.d3 (13.d4 Nd4 14.Be3–+) 13...Nf2 14.Kg1 Nd3 15.Kh1 Ne1 16.Ne1 b3 (better is 16...Qf2 17.Nf3 Qe2 18.Ng1–+) 17.Nc3 0-0 (better is 17...b2 18.Rb1 bc1Q 19.Rc1–+) 18.h3 b2 19.Bb2 Qb2 20.Nd3 Qa1 21.Kh2 Qc3 22.Kg3 Ra4 23.h4 e4 0–1. pieeater – john1007, ChessWorld.net, 2012.

4.cb4 d5 5.Bb2 d4 6.e3 f6 (6...de3 7.de3 Qd1 8.Kd1=) 7.Bd3 (7.ed4 ed4 8.Bb5 Nc6+/–) 7...de3 8.de3 Nh6 9.Bb5 (9.Qc2 g6+=) 9...Nd7 (9...Bd7 10.Be2=) 10.Bd7 (10.Nf3 a5+=) 10...Qd7 (10...Bd7 11.Nc3=+) 11.Qd7 (11.Nc3 Qc6=) 11...Bd7=+ 12.Ne2 (12.Nf3 a5 13.ba5 Ra5=+) 12...a5 13.ba5. mgriffin (1620) – kennethcummings, net–chess.com, 2001.

4.cb4 d5 5.Bb2 Bd6 6.e3 Nf6 7.Nc3 a6 8.Rc1 0-0 9.Nf3 h6 (9...Nc6 10.d4=+) 10.Be2= Bf5 11.Na4 Qe7 12.Nb6 Ra7 13.Qb3 Be6 (better 13...Qe6!?=) 14.Ne5+/- (worse 14.Be5 Be5 15.Ne5 Qd6-/+) 14...d4 (14...a5 15.Nd3+/-) 15.Nec4 Nc6 16.Qd3 Rd8 17.Bd4 Nd4 18.Qd4 Bb4 19.Qb2 Bd6 20.Nd6 Qd6 21.d4 Nd5 22.Nc4 Qe7 23.0-0 b5 (23...Raa8 24.Ne5+/-) 24.Ne5+- Bd7 25.Rc5 Nb6 26.Qb4 a5 (26...Na4 27.Rc2 Qb4 28.ab4+-) 27.Qe1 (27.Qb3 a4 28.Qb4 Be8+-) 27...b4 (better 27...f6!? 28.Nc6 Bc6 29.Rc6 Rb8+-) 28.ab4 ab4 29.Qb4 Na4 30.Nd7 Rdd7 (30...Qd7 31.Rb5 Rc8+-) 31.Rc8 Kh7 32.Qb8 f5 (32...Ra5 33.Bd3 f5+-) 33.Bh5 g6 34.Rh8 Kg7 35.Qg8 Kf6 36.Qg6 1-0. Pereira – Gatteres, internet, 2021.

4.cb4 d5 5.Bb2 Bd6 6.Nf3 Nd7 7.Qa4=+.

4.cb4 Qf6 5.Bb2 a5 6.b5 Bc5 7.Nf3+= e4?? (better 7...d6+=) 8.Bf6+- ef3 (8...Nf6 9.Qc2 d6+-) 9.Bg7 d5 10.Bh8 d4 11.Qc2 d3 12.Qc5 de2 13.Qc8 Ke7 14.Qb7 Nd7 15.Qe4 Kf8 16.Qa8 Ke7 17.Qg8 Ne5 18.Be5 (18.Qg5 f6 19.Qf6 Kd7 20.Qf5 Ke8 21.Qe5 Kd7 22.Qg7 Ke6 23.Qf6 Kd7 24.Qf7 Kd8 25.Bf6 Kc8 26.Qe6 Kb7 27.Qc6 Kb8 28.Be5 Ka7 29.Qa6) 18...ef1Q 19.Kf1 (19.Kf1 h6 20.Qb8 fg2 21.Kg2 Ke6 22.Qd6 Kf5 23.f3 Kg5 24.Qf6 Kh5 25.Qf7 Kg5 26.h4) 1-0. Pereira – Gatteres, internet, 2021.

4.cb4 Nf6 5.Bb2 e4 6.d4 (6.d3!?=) 6...d5=+ 7.e3 a5 8.b5 b6 9.Nc3 Bb7 10.Be2 Bd6 11.Nh3 0-0 12.0-0 Qc7 13.g3 (13.Rc1 Bh2 14.Kh1 Qd6=) 13...Nbd7 14.Bg4 (14.Rc1!? Qd8 15.f3=+) 14...Ng4-/+ 15.Qg4 Nf6 16.Qf5? (better 16.Qh4-/+) 16...Bc8-+ 17.Nd5 Bf5 18.Nc7 Bc7 19.Nf4 Rfd8 20.Rac1 Bf4 21.gf4 Bh3 (21...a4 22.Rc6-+) 22.Rfe1 Bg4 (22...a4 23.Rc6-+) 23.Rc6 Rab8 24.Rec1 (24.a4 Nd5-+) 24...Bf3 (better 24...Bd7!? 25.Kg2-+) 25.h3 (25.a4 Nd5-+) 25...h6 (25...Nd5 26.Kf1-+) 26.a4 Nd5 27.Ba3 Nb4 (27...Rd7!? 28.f5-+) 28.Bb4-/+ ab4 29.Rb1 Rdc8 (29...Rd5 30.Kh2-/+) 30.Rb4 Rc6 (better 30...Rd8-/+) 31.bc6= Be2? (better 31...Ra8=) 32.d5+- Kf8 (32...Ba6 33.d6 Rd8 34.Rb6 Rd6 35.Ra6 Rd1 36.Kg2+-) 33.c7 (better 33.d6 Ra8 34.Rd4+-) 33...Rc8+/- 34.d6 Ke8 35.Rb6 Kd7 36.a5 Bc4 37.a6 Bd5 38.a7 f5 39.Kf1 g5 (39...Bc6 40.Rb8+-) 40.fg5 hg5 41.Kg1 Bc6 42.Rb8 Ba8 43.Kh2 f4 44.Kg2 Bc6 (44...Bd5 45.ef4 gf4 46.h4+-) 45.Kh2 ½-½. Kenanthonylucas (2120) - kianas (2115), ChessWorld.net, 2012.

4.d4 d6 5.d5 Nf6= 6.Bg5 Be7 7.Bf6 Bf6 8.e4 b5 9.a4+/– 0-0 10.a5?? Nd7 11.h3 h6 12.Be2 Kh8 13.Nf3= a6 14.0-0 Nb8 15.Nbd2 g5 16.Nh2 Nd7 17.Ng4 Bg7 18.Ne3 Nf6 19.Qc2 Bd7 20.Nf5 Kh7 21.Nd6+/– Qc7 22.Nf5 Nh5?? 23.Bh5+- Bf5 24.ef5 f6 25.Ne4 Qb7 26.Rad1 Qa7 27.d6 Rfd8 28.Rd5 Qb7 29.Rfd1 Bf8 30.Nf6 Kg7 31.Ne4 Ra7 32.Nc5 Qc8 33.Ne6 Kh8 34.Nd8 Qd8 35.d7 Rc7 36.Be8 Bg7 37.Rd6 Ra7 38.Rc6 e4 39.Qe4 Bc3 40.Rc8 (40...Bb2 41.Bg6 Kg7 42.Qe8 Qe8 43.de8N Kf8 44.Nf6 Ke7 45.Ng8#; 40.Rh6 Kg7 41.f6 Qf6 42.Qh7 Kf8 43.Rf6 Bf6 44.Qf7#) 1–0. olo (1920) – rsuzukovich (1815), net–chess.com, 2007.

4.e3 e4 5.Bc4 d5 6.Be2 Nf6 7.a4 h5 8.a5 Qd7 9.Qa4 a6 10.Qd7 Bd7 11.Na3 1–0. maddoxdb – xulder, gameknot.com, 2013. (=1.c3 e5 2.b4 c5 3.a3 c4)

4.Bb2 Qb6 5.Qc2 d6 6.e4 cb4 7.cb4 Nbd7 8.Nc3 Ng4? 9.d3 Ndf6? 10.h3+- Nh6 11.Nf3 1–0. chessH – SweeneyTod, ChessWorld.net, 2002.

4.bc5 Bc5 5.d4 ed4 6.cd4 Be7=.

4.d3 d5 5.Nf3 cb4 6.ab4 =+.

4.d3 Be7 5.Nf3 0-0 6.Ne5+= b6 7.e3 Bb7 8.d4 cd4 9.cd4 d6 10.Nf3+/– a5 11.Bb2 a4 12.Bb5+- h6 13.Ba4 Ne4 14.0-0 d5 15.Nc3 Nd7 16.Ne4 de4 17.Nd2 Nf6 18.h3 Bd5 19.Bb3 Bb3 20.Qb3 Qb8 21.Qc3?? Nd5?? 22.Qc4 Nf6 23.Rac1 Qe8 24.d5 Bd6? 25.Qd4 b5 26.Rc6 Be7?? 27.Ne4 Rd8 28.d6 Rd7?? 29.Qe5 Nh5 30.Qh5 Bd8 31.Qg4 f6 32.Nc5 Rdf7 33.d7 Qe7 34.Re6 Qe6 35.Ne6 f5 36.Qg6 Be7 37.Nf8 Kf8 38.Rd1 Kg8 39.d8Q Bd8 40.Rd8 (40...Rf8 41.Qg7#) 1–0. pillsbury – rsuzukovich (1830), net–chess.com, 2007.

4.Nf3 Qc7 5.Bb2 Be7 6.e3 0-0 7.d3 d5 8.h3 e4 9.de4 de4 10.Ng5? Rd8?? 11.Qc2 cb4 12.Ne4 Ne4 13.Qe4=+ ba3 14.Na3 Qd6 15.Nc4 Qe6 16.Qf3?? Qf5?? 17.Qe2?? Be6 18.Nd2 Nc6 19.Nf3 Ne5 20.Nd4 Qg6 21.Ne6? Qe6 22.Qc2–/+ Rd7 23.Be2 a6 24.0-0 Rc7 25.Rfd1= Rac8 26.Rac1 Nc4 27.Bg4+/– Qb6 28.Rb1 Rf8 29.Bf5 g6 30.Bg4 Qc5 31.Bf3= b5 32.Be2 Nb2=+ 33.Rb2 Qc3 34.Qc3 Rc3 35.Ra2 Ra8 36.Bf3 Ra7–/+ 37.Rda1 Bf6 38.Ra6=+ Ra6 39.Ra6 Be5 40.g3= Rc1 41.Kg2 b4 42.Rb6 Bc3 43.Rb7 Rc2 44.Bd5+/– Be1 45.Rf7 Kh8 46.h4 Rc3 47.Rb7 Rc2= 48.Rf7 Rd2 49.Bb3 Rb2 50.Bc4 b3 51.e4 Rb1 52.e5 b2+= 53.e6 (53...Bb4 54.Bd3+/–) 1–0. grahamtrue (2070) – macedon (2065), net–chess.com, 2008.

4.Nf3 Qc7 5.bc5 e4 6.Ng5 Bc5 7.d4 Be7 8.f3 d5 9.fe4 –/+.

4.Nf3 Qc7 5.d3 d5=+ 6.Bg5 Nbd7 7.e3 cb4 8.cb4 a5 9.b5 =+.

4.Nf3 e4 5.Ne5 Qc7 6.Nc4 cb4 7.Ne3 ba3 8.Ba3 Ba3 9.Na3 –/+.

4.Nf3 e4 5.Ng1=+ d5 6.d4 cd4 7.cd4 a5 8.b5 Bd6 9.Bg5 =+.

4.Nf3 e4 5.Nh4 a5 6.bc5 Ng4 7.Nf5 Qf6 8.f3 Qf5 9.fg4 Qe5 10.e3 h5 11.Qc2 hg4 12.Bb2 g3 13.c4 Qf5 14.d4 ed3 15.Bd3 Qc5 16.h4 Qe3 17.Qe2 Qe2 18.Ke2 Na6 19.Nc3 b6 20.Be4 Rb8 21.Kf3 Nc5 22.Rae1 Ne6 23.Nb5 Ba6 24.Kg3 Rc8 25.Rc1 Be7 26.a4 Nc5 27.Bc2 Kf8 28.Rce1 Ne6 29.Bb3 Rh6 30.Be5 Rg6 31.Kh3 Bb7 32.Rh2 d6 33.h5 Rg5 34.Bd6 Bd6 35.Nd6 Nf4 36.Kh4 Rg2 37.Rf1 Rh2 38.Kg4 0–1. marre (2140) – Grgs (2580), Rated game, 3m + 0s, 2010.

4.Nf3 e4 5.Nh4 d5 6.d4 cd4 7.cd4 Be7 8.h3 Nc6 9.Nc3 –/+.

4.ab4 Bb4 5.Ba3 Nc6 6.Bb4 Nb4 7.e4 Nf6 8.d3 d6 9.Nf3 Nd7 10.Be2 Nc5 11.0-0 0-0 12.Nc3 f5 13.ef5 Bf5 14.Ne1 a5 15.f3 (15.Bf3 Rc8–/+) 15...Qg5 16.Ne4 (16.f4 Qh6 17.fe5 de5 18.Kh1–+) 16...Qe3 17.Kh1 Ne6 (17...Ne4?! 18.de4 Be6 19.Nc2 Nc2 20.Qc2–/+) 18.Nd6 (18.Rg1 Nd4 19.Bf1–+) 18...Nd4 19.Nf5 (19.Ra3 Rf6 (19...Ne2?! 20.Nf5 Rf5 21.g4–+) 20.c5 b5–+ (20...Ne2?! 21.Nf5 Rf5 22.g4–+)) 19...Rf5 (19...Qe2?! 20.Qe2 Ne2 21.Rf2–/+; 19...Nf5?! 20.f4 Nd4 21.Bg4–+) 20.g4 Rf7 (20...Ne2?! 21.gf5 Nf4 22.Ra3=) 21.Ng2 Qe2 22.Qe2 Ne2 23.Rae1 Nd4 24.Re5 a4 (24...Nd3?! 25.Rd5 Nf3 26.Rd3–+) 25.Ne1 (25.Re4 Nb3 26.Ne3–+) 25...a3 (25...a3 26.Rf2 a2 27.Ra2 Ra2 28.Re8 Rf8 29.Rf8 Kf8–+) 0–1. REIS – Miller07, playchess.de, 2002. (=1.c4 c5 2.a3 e5 3.b4 cb4)

4.d4 ba3 5.de5=+ Qa5 6.Bd2 Qe5 7.Na3 Nc6 8.Nf3 Qb8 9.e4 Nf6 10.Bd3 Nb4 11.Bb1 Bc5 12.0-0 Nc6 13.Bc3 d6 14.Qd2 Ne5 15.Ne5 de5 16.Qg5 Ba3 17.Qg7 Rg8 18.Qf6 Be7 19.Qh6 Be6 20.Qh7 Kd7? 21.Rd1+- Kc6 22.Bd3 Bf6 23.Qh6 Bg5 24.Qh5 Bf4 25.Qe2 Bg4 26.Qb2?? Bd1+= 27.Rd1 a6 28.Be2 Rg6 29.c5 Qc7 30.Qb3 Rd8 31.Qa4 (31...Kc5 32.Bb4 Kb6 33.Qa5 Ka7 34.Qc7 Rd1 35.Bd1+-) 1–0. Spiegel,Ulrich – Diener,Rudolf, corr SOK–88–25, 1989.

4.d4 d5 5.cd5 Qd5 6.Nf3 =+.

4.Bb2?? Qb6 5.Qc1 Bf2 6.Kd1 Bg1 7.e3 Qh6 8.Be5 (8.Be2 Bh2 9.g3–+) 8...Qh5 9.Ke1 (9.Be2 Qe5 10.Nc3 Be3–+) 9...Qe5 10.d4 Be3 11.de5 Bc1 12.Nc3 (12.Nd2 Bb2 13.Rd1 Nc6–+) 12...Bb2 13.Nd5 Ba1 14.Nc7 Ke7 15.Bd3 Be5 16.Na8 Nc6 17.g3 (17.Kd2 d5 18.Re1 Nf6–+) 0–1. BigSky (2705) – duckbreath (2545), ICC, 1998.

4.Bb2?? Qb6–+ 5.d4 Qb2 6.c3 (6.Nd2 Bd4 7.Rb1 Qa3–+) 6...ed4 (6...Qa1 7.dc5 Nf6 8.Nf3–+) 7.Nd2 dc3 (7...Qc3!? 8.Ngf3 Nc6 9.a4–+) 8.Nc4 c2 9.Nb2 cd1N 10.Nd1 Nc6 11.e3 Nf6 12.Nc3 a6 (12...d5 13.Nb5 0-0 14.Nf3–+) 13.Bc4 (13.Nf3 b5–+) 13...b5 14.Bd5 0-0 (14...Rb8 15.Ne4 Bb4 16.ab4 Nd5 17.Ne2–+) 15.Bf3 Rb8 16.Nge2 (16.Nd5 Nd5 17.Bd5 b4–+) 16...Ne5 17.0-0 (17.h4 Rd8–+) 17...Nc4 18.Nd5 Nd5 19.Bd5 Na3 20.Rfc1 d6 21.Nd4 b4 22.Nc6 Rb6 23.Ne7 Kh8 24.Bb3 Be6 25.Nd5 Bd5 26.Bd5 b3 (26...b3 27.Bb3 Rb3–+) 0–1. Monastyrev,Stepan (2300) – Karpov,Victor, RUS–Cup Tomsk, 1999.

4.Bb2?? Qb6–+ 5.e3 Qb2 6.Nc3 –+.

4.Bb2?? Nc6?? 5.e3+= Qb6 6.Qc1 (6.Nc3 Nf6=) 6...Nf6 7.Nc3 d6 8.Na4 Qc7 9.Nc5 dc5 10.Nf3 0-0 11.d3 Nd5 12.Be2 Nb6 13.Rb1 Na4 14.Ba1 Be6 15.0-0 Ba2+= 16.Rb5 a6 17.Rb3 Bb3 18.cb3+= Nb6 19.Qc5 Can e5 get defended? 19...Nd7 20.Qc3 Rac8 21.Rc1 Rfe8 22.Bf1 Qb6 23.Qb2 Na5 24.Rc8+/– Rc8 25.b4 Nc6+= 26.d4 ed4 27.ed4 Nf6 28.Qc3 Qd8 29.Qe3 Qe8 30.Qb3 Rd8 31.b5 Nb8 32.ba6 ba6 33.h3 a5 34.Bc4 a4 35.Qa2 Rc8 36.Ne5 Kf8 37.Bf7 Qd8 38.Bc4+/– Nc6 39.Nc6 Rc6 40.Bc3 Qc7? 41.Bb4+- Ke8 42.Bb5 Kd8 43.Bc6 Qc6 44.Bc5 Qd7 45.Qc4 Qe8 46.Qb4 Nd7 47.Qa5 Kc8 48.Qa6 Kd8 49.Qa4 Qe1 50.Kh2 Qf2 51.Bd6 Qc2 52.Qa8 Qc8 53.Qc8 Kc8 54.Kg3 Nf6 55.Kf4 Kd7 56.Bc5 Kc6 57.g4 1–0. Fournier,Frederic (1900) – Boutchenik,Cyril, Ch Club, 2010.

4.Bb2?? Nc6?? 5.e3+= d5 6.Bb5 Qe7 7.Nf3 Bd6 8.Nc3 Nf6 9.0-0 0-0 10.Be2 e4 11.Nd4 Qe5 (11...Nd4 12.ed4 Qc7–/+) 12.g3 (better is 12.f4 Qe7 13.Ncb5=) 12...Nd4–/+ 13.ed4 Qd4 14.Rb1 Bh3 15.Re1? (better is 15.Nb5!? Qb6 16.Bf6 Bf1 17.Bf1 gf6 18.d3–+) 15...Bc5 16.Ne4 Qe4 17.Bf1 Qg4 (17...Bg4 18.Re4 Bd1 19.Re1 Bc2 20.Rbc1–+) 18.Bf6 Qd1 19.Red1 Bf1 20.Bg7 Kg7 21.Kf1 b6 22.a4 Rac8 23.c3 Rfe8 24.Re1 Re6 25.Re2 Re2 26.Ke2 Re8 27.Kf1 Re4 28.d4 Bd6 29.Rb5 Kf6 30.Rd5–/+ Ke6 31.Rh5 Ba3 32.Rh7 Bb2 33.Rh6 f6 34.Rh7 Bc3 35.Ra7 Ba1 36.h4 Bd4 37.h5 f5 38.h6 Bc3 39.h7= Rc4 40.Ra8 Kd5 41.Ke2 Kc6?? 42.Kd3+- Rc5 43.Rc8 Kd7 44.Rc6 (44.Rc6 Rc6 45.f3–+) 1–0. Fournier,Frederic – contumaz, Active (6/7), 2004.

4.Bb2?? Nc6?? 5.e3+= d5 6.Nf3 Bg4 7.Be2 e4?? (7...Bd6 8.Nc3 Nf6 9.h3+=) 8.Nd4 (better is 8.Bg7 ef3 9.Bf3 Bf3 10.Qf3+-) 8...Be2 9.Ne2 Nf6 10.Nf4 0-0 (10...d4 11.ed4 Nd4 12.Ne2+=) 11.d4 (11.Bf6 Qf6 (worse is 11...gf6 12.Nc3+/–) 12.Nc3 Ne7=) 11...ed3 (11...Bd6!?–/+) 12.Nd3+= Bd6 13.Nd2 Ne4 (13...Qe7 14.Bf6 Qf6 15.0-0+=) 14.Ne4= de4 15.Nc1 (better is 15.Qg4 Qa5 16.Kf1=) 15...Qc7 16.g3 (16.Qd5!? Rfe8 17.Ne2–/+) 16...Ne5 17.Be5 Be5 18.Rb1 Bc3 19.Kf1 Qc4 20.Qe2–/+ Qc6 21.Kg2 Rad8 22.Rd1 b6 23.Nb3 Be5 24.Rd8 Rd8 25.Rd1 Rd6 26.Rd6 Qd6 27.a4 a5 28.Qd2 Qd2 29.Nd2 f5 30.c4 Kf7 31.f3 Bc3 32.Nb3 Ke6 33.f4 Kd6 34.Kf2 h6 35.h4 Bb2 36.h5 Bf6 37.Ke2 Bc3 38.Kf2 Ke6 39.Ke2 Kf6 40.Kf2 g5 41.Ke2 g4 42.Kd1 Ke6 43.Ke2 Kd6 44.Kf2 Bf6 45.Ke2 Bb2 46.Kd2 Bf6 47.Ke2 Bc3 48.Kd1 Bb4 49.Ke2 Bc3 ½–½. Fournier,Frederic (1830) – BETELGEUSE2 (1770), Active, 2011.

4.Bb2?? Nc6?? 5.e3 d6 6.Ne2 (6.Nf3 Nf6=) 6...a6 (6...Nf6 7.Nbc3=+) 7.h3 (7.d4 ed4 8.Nd4 Nf6=+) 7...Nf6 8.d4 ed4 9.ed4 (9.Nd4 0-0=+) 9...Ba7 10.Nd2? (better 10.g3-/+) 10...0-0-+ 11.Nf3 Re8 12.Qd2 (12.Qd3 b5-+) 12...Ne4 13.Qd3 (13.Qe3 Na5 14.Nd2 Bf5-+) 13...f5 (better 13...Qb6 14.Bc3 Bf5-+) 14.Nd2 Qa5 15.Rd1? (15.Qe3 Nf6 16.Qd3 b5-+) 15...Nd2 (better 15...f4-+) 16.Rd2 d5 (16...Re7 17.Kd1-/+) 17.g3-/+ Be6 (17...f4 18.gf4 Bb8 19.Kd1-/+) 18.Bg2 Rad8 (18...Qb6!? 19.Qb3 Rad8=+) 19.0-0= Bc8 (19...Bb8 20.Re1=) 20.Nf4 Ne7? (better 20...Re4!?=) 21.Re1 (21.Re2 Bb8 22.Bc3 Qa3+/-) 21...Bd7+/- 22.Nd5?? (better 22.Qc3 Qc3 23.Bc3+/-) 22...Bb5?? (better 22...Nd5 23.Re5 Re5 24.de5 Nc7 25.Qb3 Kf8=+) 23.Ne7+- Re7 24.c4?? White intends d5 (better 24.Qb3 Kf8 25.Re7 Ke7 26.Rd1+-) 24...Re1-+ 25.Kh2 Bc6 26.d5 Be8 27.f4 (27.d6 Bc6 28.Bc3-+) 27...Bg1 28.Kh1 Be3 (28...Be3 29.Bf1 Qd2 30.Qd2 Bd2-+) 0-1. nautica (1985) - sde (2040), Rated Blitz game, lichess.org, 2014.

4.Bb2?? Nc6?? 5.e3 Nf6 6.c4-/+.

4.Bb2?? Nc6?? 5.e3+= Nf6 6.Nf3 e4 7.Ne5 +=.

4.Bb2?? Bf2 5.Kf2 Qb6 6.e3 Qb2 7.Nc3 Qb6 8.Nf3 Nc6 9.Bc4 Nf6 10.Rf1 (10.Qf1 e4 11.Ng5 Qc5 12.Nge4 Ne4 13.Ne4 Qf5 14.Ke1 Qe4 15.Qf7 Kd8 16.Qg7 Qe5 17.Qe5 Ne5-/+) 10...0-0 (10...Qc5 11.Be2-/+) 11.Kg1 e4 (better 11...Qc5 12.Bb5 e4-/+) 12.Ng5+= Qc5 13.Bf7 Rf7 14.Nf7 Kf7 15.Ne4 Qe5 16.Nf6 gf6 17.Qf3 d5 18.Rab1 b6 19.Rb5 Attacks the isolani on d5 19...Be6 20.d4 Qg5 21.a4 (better 21.h4!? Qg6 22.Rd5+=) 21...Ne7 22.e4 (22.a5 Nf5 23.ab6 ab6 (23...Qe3? 24.Qe3 Ne3 25.Ra1+-) 24.Rb6 Ra2 (worse 24...Qe3 25.Qe3 Ne3 26.Re1+/-; worse 24...Ne3 25.Rb7 Kg8 26.h4+/-) 25.Rb7 Kg6=) 22...Bg4 (22...Qh4 23.a5-/+) 23.Qf2 Rd8 (23...Bd7 24.h4 Qh6 25.e5-/+) 24.e5 (24.ed5 Rd5 (24...Nd5? 25.c4+-) 25.Rd5 Nd5=) 24...f5 (24...Bf5 25.ef6 Qf6 26.Rb3+=) 25.Kh1 (25.a5 ba5 26.Ra5 Rd7+=) 25...Kg8 (25...Ke8 26.a5 ba5 27.Ra5=) 26.Rb3 Kh8 27.Rg3 f4 (27...Rc8 28.h3 Qh6 29.a5=) 28.Rc3 (28.Qf4 Qf4 29.Rf4 Bf5+/-) 28...Rg8? (28...Rf8=) 29.Rc7?? (29.Qf4 Be6 30.Qg5 Rg5 31.Rf8 Rg8+-) 29...Nf5?? (better 29...Bf5 30.Qd2 Be4-/+) 30.Qf4+/- (30.Ra7 Ne3 31.Qf4 Nf1 32.Qf1 Be2 33.Qf6 Qf6 34.ef6 Rf8-/+) 30...Qf4 (30...Qg6 31.Rf2 (31.Ra7 Bh3 32.g4 Bg4-/+) 31...a6 32.Ra7+/-) 31.Rf4+- Rg7?? (better 31...Ne3+-) 32.Rc8 (32.Rg7 Kg7 33.Rg4 Kf7+-) 32...Rg8 33.Rc7 (better 33.Rg8 Kg8 34.Rg4 Kf7+-) 33...h5?? (33...Rg7 34.Rg7 Kg7 35.Rg4 Kf7+-) 34.h3+- Ng3 35.Kh2 Bf5 36.Ra7 (36.Rf3 h4 37.Rf4 Rg6+-) 36...Rg5? (36...Be4 37.Rf2+-) 37.c4! dc4 38.d5 c3 39.Rc7 (39.e6 c2 40.e7 Rg8+-) 39...c2 40.e6 Ne2?? (40...Rg7 41.Rc6 Be4+-) 41.Rf5! Rf5 42.e7 (42.Rc2?! Re5 43.d6 Re6+-) 42...Re5 43.d6 h4 (43...c1Q 44.Rc1 Nc1 45.d7+-) 44.Rc2 (44.d7 Rg5 45.e8Q Kg7 46.d8Q Kh6 47.Qf6 Rg6 48.Qeg6) 44...Ng3 45.Rc8 (45.d7 Kg7 46.d8Q Nf5 47.Qf8 Kh7 48.e8Q Re8 49.Qf5 Kg8 50.Qg6 Kf8 51.Rc7 Re7 52.Rc8 Re8 53.Re8) 45...Kg7 46.e8Q Re8 47.Re8 Nf1 48.Kg1 Nd2 49.d7 Nc4 (49...Kf6 50.d8Q Kf7 51.Qd7 Kg6 52.Re6 Kg5 53.Qd5 Kf4 54.Qe5) 50.d8Q Nd6 (50...Ne5 51.Qg5 Ng6 52.Re7 Kf8 53.Qf6 Kg8 54.Qg7) 51.Qd6 Kf7 52.Re7 Kf8 (52...Kg8 53.Qd8) 53.Qd8 1-0. 147a (1980) - topce (2130), Rated Bullet game, lichess.org, 2014. (=1.a3 c5 2.b4 e5 3.bc5 Bc5)

4.Nc3 Nf6-/+.

4.e3 a6 5.Bb2 Nc6= 6.g3 d5=+ 7.Bg2 Nf6 8.Nc3 0-0 9.Nf3 b5 10.0-0 e4 11.Ne1 Ng4 12.d4 Bd6 13.Nd5. thedesertfox (1750) – emanzanos, net–chess.com, 2004.

4.e3 Qf6 5.Bb2 Nc6 6.Bc4 Qg6 7.Nf3 Qg2?? 8.Rg1+- Qh3 9.Rg7 Nh6? 10.Ne5 Ne5 11.Be5 d6? 12.Rg3 Qf5 13.Bh8 d5 14.Bd3 Qe6 15.Bh7 d4 16.Qe2 Bd6 17.Rg2 Bd7 18.ed4 Qe2 19.Ke2 0-0-0 20.Be5 Re8 21.Kd3 Be5 22.de5 Rd8 23.Ke3 Ng4 24.Kf4 Nh6 25.c3 Bc6 26.Rg3 Bd7 27.d4 Rh8 28.Be4 Rf8 29.Kg5 Rh8 30.Nd2 f5 31.Bf3 Nf7 32.Kf6 Nh6 33.Kg7 f4 34.Rg6 Rg8 35.Kh6 Rh8 36.Kg5 Be8 37.Rg7 Rf8 38.Bb7 Kd8 39.Rb1 Bd7 40.Bc6! Rf5 41.Kg6 Bc8 42.e6! Be6 43.Rb8 Bc8 44.Bb7 Rf6 45.Kf6 Ke8 46.Rc8# 1–0. Skjoldan,Benjamin – Ivarsson,Daniel, Nordic–ch U20, 2000.

4.e3 Qf6 5.Bb2 Ne7 6.Qc1 (6.Nf3 d6=) 6...Nec6 (6...Nbc6 7.Nc3 d5 8.Nge2+=) 7.Nc3= Nd4?? (better is 7...Qd8=) 8.ed4 Bd4 9.Nce2?? (better is 9.Nf3+-) 9...Bf2 (9...Qf2 10.Kd1 Qf1) 10.Kd1+= Be3?? (better is 10...d6+=) 11.de3?? (better is 11.Nf3 Bh6 12.Be5+-) 11...Qf1–+ 12.Kd2 Qf2?? (better is 12...Qg2 13.Nf3 Qf3 14.Be5 f6 15.Bb8 Rb8–+) 13.Qe1 (worse is 13.Be5 Qg2 14.Nh3 Qh3 15.Bg7 Rg8–/+) 0–1. Fournier,Frederic – calicuselectrus (1720), Active, 2007.

4.e3 Qf6 5.Nc3 Nc6=.

4.e3 Nf6 5.Bb2 Nc6 6.Nf3 e4 7.Ng5 (7.Ne5 d6 8.Nc6 bc6+=) 7...h6 8.Nh3 d5 9.Nf4 d4 10.Be2 0-0 11.0-0 Qd6 12.Bc4 Bg4 13.Be2 Bf5 14.Bc4 Na5 15.Ba2 Rfd8 16.Qe2 Rac8 17.Qb5 Nc6 18.Qb7 (18.c3!?–/+) 18...Rb8–+ 19.Qf7 Kh8 20.Bd4 (20.ed4 Qf4 21.dc5 Rb2–+) 20...Bd4 21.ed4 Nd4 22.Ng6 Bg6 23.Qg6 Nc2 24.Nc3 Na1 25.Qe4 (25.Bb1 Qd4 26.Be4–+) 25...Ne4 26.Ne4 Qd4 27.Bb1 Rb2 28.Ng3 Nb3 29.d3 Nd2 30.Nf5 Qb6 (30...Qb6 31.Bc2 Nf1–+) 0–1. Yannick – Harijs, playchess.de, 2005.

4.e3 Nf6 5.Bb2 d6 6.d4 ed4 7.Bd4 Bd4-/+ 8.ed4 0-0 9.Nf3 (9.Bd3 Nd5 10.Ne2 Bg4=+) 9...Re8 10.Be2 Bg4 11.0-0 d5 12.Nbd2 Nc6 13.c3 Qb6 (13...Qa5 14.c4-/+) 14.h3 Bf3 15.Nf3 Rac8 (15...Qb2!? 16.Re1 Ne4-/+) 16.Rb1 Qa5 (16...Qc7 17.Bd3=+) 17.Rb7 Qa3 18.Ne5 (18.Rb3 Qd6 19.Bb5=) 18...Qc3 (18...Ne5 19.de5 Re5 20.Bg4=+) 19.Ba6?? (better 19.Bb5 Nd8 20.Be8 Nb7 21.Bf7 Kf8 22.Be6+=) 19...Nd4-/+ (worse 19...Ne5 20.Rb3 Qa5 21.Bc8=) 20.Ra7? (20.Nf7 Rb8 A) 21.Ra7?? Qc5 22.Nd6 Qa7 (22...Qd6?! 23.Qd4 Rb4 24.Qa1=) 23.Ne8 Qa6 24.Qd4 Re8-+ (24...Ne8?! 25.Qd5 Kf8 26.Rd1-+); B) 21.Nd6-/+) 20...Re5-+ 21.Bc8 Ne2 22.Kh1 (22.Kh2 Qc8 23.Qa4 Ne8-+) 22...Qc8 23.Re1 (23.Qb3 h6-+) 23...Qc4 (23...Qe8 24.Ra1-+) 24.Ra8 Ne8 25.Re2 (25.Rd8-+) 25...Qe2 (25...Re2 26.Kg1-+) 26.Qa1 g6 27.Qa4 (27.Rd8 Qh5-+) 27...Kg7 28.Rd8 (28.Qd4 Nf6 29.Qc5 Re7-+) 28...Qe1 (better 28...Qf2 29.Qa1 f6 30.Rd7 Kg8 31.Kh2-+) 29.Kh2 Re7 (29...Re2 30.Qf4 Nf6 31.Qd6-+) 30.Qd4 (30.Rd5 Nf6 31.Rd3 Re2-+) 30...Nf6 31.Rd5 (31.f3 Qe6-+) 31...Re6 (better 31...Re4 32.Qd2 Nd5 33.Qd5-+) 32.Rd7 (32.f3-+) 32…Qe5 (32...Qe5 33.Qe5 Re5-+) 0-1. GM_HUSARZ (1960) - hutgovy (1975), Rated Bullet game, lichess.org, 2015.

4.e3 Nf6 5.d4= Bd6 6.Nf3 Nc6 7.Be2 e4= 8.Nfd2 Qc7 9.h3 0-0 10.c4 b6 11.Nc3 Re8 12.Nb5 Qb8 13.Nd6 Qd6 14.Bb2 Bb7 15.0-0 Rac8 16.Re1 a6 17.f4 Ne7 18.a4 Nf5 19.Nf1 Qb4 20.Ba3 Qc3=+ 21.Qc1 Qc1 22.Rec1 d5 23.Rab1 Rc6 24.c5 Ree6 25.g4 Nh4 26.g5?? Nd7+= 27.Bg4 (27...Nf3 28.Kf2+-) 1–0. Mueller,P – Maurer, corr SOK–89–43, 1989.

4.g3 Nf6–/+ 5.Bg2 (5.Nc3 Nc6–/+) 5...d5 (5...0-0 6.Nc3 d5 7.Nf3–/+) 6.d3 (6.Nc3 0-0–+) 6...Nc6 (6...Qb6 7.e3 d4 8.Nd2 de3 9.fe3–/+) 7.Nf3–/+ Be6 (better 7...e4 8.de4 Ne4–/+ (8...de4?! 9.Qd8 Nd8 10.Ng5=)) 8.Bb2?? (8.0-0!?–/+) 8...Ng4 (better 8...Qb6 9.Bc1 Bf2 10.Kf1 e4–+) 9.h3?? (better 9.e3 Qb6 10.Bc1–/+) 9...Bf2 10.Kf1 (10.Kd2 Be3 11.Ke1 Nf2–+) 10...Ne3 11.Kf2 Nd1 12.Rd1 Qb6 13.e3 (13.Kf1 Qb2 14.Nbd2 Qc2–+) 13...Qb2 14.Nbd2 0-0 (14...Qc2 15.Rdc1 Qd3 16.Bf1–+) 15.Rdc1 (15.Rab1 Qc2 16.d4 ed4 17.ed4 Qa4–+) 15...Qb6 (15...Qc3 16.Kg1–+) 16.c4 (16.Rab1 Qa6–+) 16...dc4 17.Nc4 (17.Rab1 Qa6 18.Nc4 e4–+) 17...Bc4 18.dc4 Rad8 (18...e4 19.Ng1 Na5 20.Be4–+) 19.Rab1 Qc7 (better 19...Qa5 20.Rc2–+) 20.a4 (20.Rd1 Rd1 21.Rd1 Rd8–+) 20...e4 21.Ng5 f5 (21...Rd2 22.Ke1 Rg2 23.Ne4 Qe5 24.Rc2 Rc2 25.Rc1 Rc1 26.Kf2 Rc2 27.Nd2 Rd2 28.Ke1 Qe3 29.Kf1 Qf2) 22.Ne6 Qe7 (better 22...Rd2 23.Ke1 Qd6 24.Rd1 Rd1 25.Rd1 Qg3 26.Kf1–+) 23.Nf8 (23.Nd8 Rd8 24.Rd1 Nb4–+) 23...Kf8 (23...Rd2 24.Kg1 Qd6 25.Kh2–+) 24.c5 (24.Rd1 Nb4 25.Bf1 Nd3 26.Bd3 ed3–+) 24...Ne5 25.Rc2 (25.Rf1 Qc5 26.Rbe1 Nd3 27.Kg1 Ne1 28.Re1 Qc3–+) 25...Nd3 26.Kg1 Nc5 (better 26...Qg5 27.Kh2 Qe3 28.Rd1–+) 27.a5 (27.Rf1 g6 28.g4 Qg5 29.gf5 Qe3 30.Kh2 g5–+) 27...Na6 (better 27...Qg5 28.Kh2 Qe3 29.Rf1–+) 28.Bf1 (28.Rf2 Qg5 29.Kh2 Nc5–+) 28...g6 (28...Nb4 29.Re2–+) 29.Ba6 (29.Kh2 Nc5–+) 29...ba6 30.Rc6 (30.Kf2 Qd7 31.Rg1 Qa4–+) 30...Qa3 (better 30...Qg5 31.Rc2 Qg3 32.Rg2 Qe3 33.Kh2 f4–+) 31.Ra6 Qe3 32.Kh1 Qf3 33.Kg1 Qg3 34.Kh1 (34.Kf1 Rd2 35.Rf6 Kg8 36.Rg6 hg6 37.Rb8 Qb8 38.Ke1 Qb2 39.Kf1 Rd1) 34...Rd2 35.Rb8 (35.Rf6 Kg8 36.Rg6 hg6 37.Rb8 Qb8 38.Kg1 Qb1) 35…Kg7 (35...Kg7 36.Ra7 Kh6 37.Rh7 Kh7 38.Rb7 Kg8 39.Rb8 Qb8 40.a6 Qh2; 35...Qb8 36.Rf6 Ke7 37.Rf7 Kf7 38.Kg1 Qb1) 0–1. Benreguia,Frederic – Neil,Charlie, FICGS, 2012.

5.e3 Nd7 6.Nf3 Ngf6 7.Bb5 (7.d4 ed4 8.ed4 Bb6=) 7...a6 8.Ba4 b5 9.Bb3 h6 (9...e4 10.d4 Bb6 11.Nfd2=) 10.0-0 0-0 11.c4 (11.d4!? ed4 12.ed4=) 11...e4 12.Nd4 Bd4 13.Bd4 Ne5 14.Be5 de5 15.cb5 Bg4 16.Qc2 ab5 17.Nc3 Rc8 18.Qa2 (18.Qb1=) 18...Bf5 (better is 18...Qd3–/+) 19.Nb5+= Nh5 20.g3 (20.a4 Nf6+/–) 20...Bh3 (20...Qd3 21.Nc3 Nf6 22.Rfc1+=) 21.Rfc1 Qf6 22.Bd1 g6 (22...Rc1 23.Rc1 Qg5 24.Nd6+/–) 23.Nc3 Qa6 (23...Qf5 24.Nd5 Qe6 25.Bh5 gh5 26.Rc8 Rc8 27.a4+/–) 24.Be2 (24.Bh5 gh5 25.Qd5 Qd3 26.Ne4 Rc1 27.Rc1 Qa3+-) 24...Qa5 (better is 24...Qa8!?+/–) 25.Ne4+- Ra8 (25...Rc1 26.Rc1 Ra8 27.Bc4 Qa3 28.Bf7 Kg7 29.Qa3 Ra3 30.Bc4+-) 26.Nd6 (26.Rc5 Qd8+-) 26...Qb6 (26...Be6 27.Qc2+-) 27.Qd5 Qb2 (27...Rad8 28.Rc6 Qb2+-) 28.Rcb1 (28.Nf7 Nf6 29.Qe5 Rab8 30.Nh6 Kg7+-) 28...Qc2?? (better is 28...Ra3 29.Nc4 Qa1 (worse is 29...Ra1 30.Nb2 Rb1 31.Nd1=) 30.Na3 Qa3 31.Qe5 Rc8–/+) 29.Bd1 (better is 29.Bh5!? Be6 30.Qe5 gh5+-) 29...Qc7 30.Rb7 Be6 31.Qe6 fe6?? 32.Rc7 Rfd8 33.Nf7 Rd2 34.Bh5 gh5 35.Ne5 Ra5 36.Nc4 Ra3 37.Na3 Rd5 38.Rb1 Rd8 39.Rbb7 Kf8 40.Nb5 Ke8 41.Nd4 Rd6 42.Ne6! (42.Ne6 Rd1 43.Kg2 Rg1 44.Kg1 h4 45.Re7) 1–0. Fournier,Frederic (2050) – pepoxio5 (1940), Echecs21, 2003.

5.e3 Ne7 6.Nf3 0-0 7.d4 ed4 8.ed4=.

5.e3 Ne7 6.Nf3 a6 7.Be2 0-0 8.0-0 Ng6 9.d3 Nh4 10.Nbd2 Bg4 11.Nh4 Qh4?? (better is 11...Be2 12.Qe2 Qh4+=) 12.Bg4+- f5 13.Bf3 Nc6 14.Bd5 Kh8 15.Nf3 Qh6 16.Bc6 (16.d4!? ed4 17.ed4 Ba7+-) 16...bc6 17.d4 ed4 18.Bd4 Bd4 19.Qd4 c5 (19...d5 20.c4+-) 20.Qh4 (20.Qd5 f4+-) 20...Qg6 (20...Qh4 21.Nh4 g5 22.Nf3+-) 21.Qg5 Qe6 22.Rfc1 Ra7 23.Qf4 Rf6 (23...Rd7 24.Rab1+-) 24.Rd1 Rd7 25.Rab1 Rg6 (25...h6+-) 26.Rb8 (26.Rb8 Qg8 27.Rg8 Kg8 28.Ne5+-) 1–0. Fournier,Frederic – dondidi, kurnik, 2009.

5.e3 Ne7 6.Nf3 h6 7.d4 ed4 8.ed4 Bb6 9.Bd3 0-0 10.0-0 Bg4 11.Nbd2 Nbc6 12.c3 Nd5 (12...d5 13.Re1+=) 13.h3 Bh5 14.c4 Nf4 15.Bc2 (15.Qb3 Qf6 16.c5 A) 16...dc5? 17.dc5 Na5 A1) 18.Bf6?! Nb3 19.Nb3 Bf3= (worse is 19...gf6 20.Be4 Bc7 21.Nfd4+/–); A2) 18.Qc2+-; B) 16...Nd3 17.cb6 Nb2 18.Qb2 ab6 19.Qb6 Rfe8=) 15...d5 (15...Nd4!? 16.Bd4 Bd4–/+) 16.c5+= Bc7 17.Re1 Bg6 (17...Qf6 18.Re3+=) 18.Bg6= fg6 19.Re3 Qf6 20.Qc2 Rae8 21.Rae1 Re3 22.Re3 (22.fe3 Nh5+=) 22...Ne7 23.Re1 Nf5 24.Nf1 Nh4 25.Nh4 Qh4 26.Ng3?? (26.Rb1 Re8 27.Ng3 Re6=) 26...Qg5?? (better is 26...Nh3 27.gh3 Bg3–+) 27.Bc1+= Qf6 28.Be3 h5 29.Ne2 Nh3?? 30.gh3+- Qf3 31.Qg6 Qh3 32.Qg2 Qf5 33.Ng3 Bg3 34.Qg3 Rf6 35.Kf1?? Rg6 36.Qf4 Qh3?? 37.Ke2+- Rf6 38.Qb8 Kh7 39.Qb7 Qf3 40.Kd2 Qe4 41.Qb1 Ra6 42.Qe4 de4 43.Ra1 h4 44.Kc3 Kg6 45.Kb4 Kh5 46.Rg1 g6 47.Rg5 Kh6 48.Re5 g5 49.Bg5 Kg6 50.Bh4 Ra4 51.Ka4 (51.Ka4 e3 52.fe3 Kh6 53.c6 Kg6 54.c7 a6 55.c8Q Kg7 56.Rg5 Kf6 57.Rg8 Kf7 58.Qe8 mate) 1–0. Fournier,Frederic (1695) – Konst_45 (1675), ChessOK.com, 2012.

5.e3 f6 6.Nf3 Ne7 7.d4 Bb6 8.de5 de5 9.Qd8 Bd8 10.Bd3 0-0 11.Nbd2 Nbc6 12.0-0 a6 13.Bc4 Kh8 14.Rfd1 Bc7 15.Ne4 Bg4 16.Be2 Bf3 (16...b6!?=) 17.Bf3+= f5 (better is 17...b5+=) 18.Nd6?? (better is 18.Nc5!? Rfc8 19.Ne6+/– (19.Nb7 Rab8–/+)) 18...Bd6 (better is 18...Rad8!? 19.Nc4 e4+=) 19.Rd6+= e4 20.Be2 Rad8 21.Rad1 Rd6 22.Rd6 Rd8 23.Rd8 Nd8 24.Bc4 Ndc6 25.Be6 h6 26.h4 Kh7 27.g3 g5 28.hg5 hg5 29.Kf1 Kg6 30.Ke2 g4 31.Bc3 a5 32.Kd2 b5 33.Bb2 b4 34.c3 ba3 35.Ba3 Kf6 36.Bd7 Ke5 37.c4 Nb4 38.Bb4 ab4= 39.Kc2 Kd6 40.Be8 Kc5 41.Kb3 Nc8 42.Bd7 Ne7 43.Be6 Kd6 44.Bd5 Kc5 45.Be6 Kd6 46.Bd5 Nd5 47.cd5 Kd5 48.Kb4 Kc6 49.Kc4 Kd6 50.Kd4 Ke6 51.Kc5 Ke5 52.Kc4 Kd6 53.Kd4 Ke6 54.Kc5 Ke5 55.Kc4 Kd6 ½–½. Fournier,Frederic (1745) – leonid_lavrenov (1920), ChessOK.com, 2012.

6.d4 ed4 7.ed4 Bb6=.

6.Nf3 0-0 7.Bc4 Nc6 8.0-0 e4 9.Nd4 Nd4 10.ed4 Bb6 11.d3 d5 12.Bb5 Bf5 13.Nd2 Bg6 (13...ed3 14.Bd3 Bd3 15.cd3–/+) 14.Re1 a6 15.Ba4 ed3 16.cd3 Bd3 17.Nf3 Bg6 18.Ne5 Bh5 19.Qd3 Bc7 20.Bc2 Bg6 21.Ng6 fg6 22.Re3? (22.Qh3 Qc8 23.Qc8 Rac8–/+) 22...Ne4 (22...Ng4 23.Rf3 Bh2 24.Kf1–+) 23.f3? (23.Re2 Qh4 24.g3 Qh5 25.Re4 de4 26.Qb3 Kh8 27.Be4 Rae8–/+) 23...Nf6?? (better is 23...Qh4 24.Re4 Qh2 25.Kf1 de4 26.Qb3 Kh8 27.Be4 Rae8–+) 24.Rae1+= Qd6 25.g3 Rfe8 26.Re8 Re8 27.Re8 Ne8 28.Qe3 Nf6 29.Qe5? (better is 29.a4–/+) 29...Qb6–+ 30.Qe7 Qb2 31.Qe6?? (better is 31.Qc7 Qd4 32.Kg2–+) 31...Kf8 32.Qc8 (32.Qe2 Qa3 33.Bd1 Qc3–+) 32...Ne8 33.Ba4 Qd4 34.Kg2 Qa4 0–1. Fournier,Frederic (2055) – mirlotu (1950), Active, 2004.

6.Nf3 Bf5 7.d4 ed4 8.ed4 Bb6 9.Bd3 Bg6 10.0-0 0-0 11.Bg6 hg6 12.c4 Nc6 13.d5 Ne7 14.Re1 Nf5 15.Nbd2 (15.Ra2 Rc8 16.Bf6 Qf6+=) 15...Ng4 (better is 15...Bf2 16.Kf2 Qb6 17.Bd4 Ng4 18.Kf1 Nd4–/+) 16.Ne4+= Re8 17.h3?? (better is 17.Qc2=) 17...Re4–+ 18.hg4 (18.Re4?? Bf2 19.Kh1 Ng3 mate) 18...Rg4 19.Nh2?? (better is 19.Qc2–+) 19...Rg2 (better is 19...Bf2 20.Kf2 Qb6 21.Bd4 Rd4–+ (21...Qd4?! 22.Qd4 Rd4 23.g4 Rd2 24.Kg1–+)) 20.Kg2+- Qh4? 21.Qf3 Qc4 22.Rac1?? Qb5 23.Rb1?? Nh4–+ 24.Kg3 Nf3 25.Kf3 Qb3 26.Kg2 Qd3 27.Nf3 (27.Nf3 Qf5 28.Nh2–+). Fournier,Frederic – Vladimir_Vas, Active (2+0), 2012.

6.Nf3 Bg4 7.Be2 0-0 8.0-0 Nc6 9.h3 Bh5 10.d4 ed4 11.ed4 Bb6 (11...Bf3 12.Bf3 Qb6 13.dc5 Qb2 14.Nd2 dc5 15.Nc4+=) 12.c4 d5 13.c5 Bc7 14.Nbd2 Re8 15.Re1 Bg6 16.Ne5 (16.Qb3 Rb8=) 16...Nd4 17.Ng6 (17.Bd4 Be5 Decoy) 17...Ne2 18.Re2 hg6 19.Nf3 Re2 20.Qe2 Qe8 21.Re1 Qe2 22.Re2 Re8 23.Re8 Ne8 24.Be5 Be5 25.Ne5 Nc7 26.Nd3 Kf8 27.f3 Ke8 28.Kf2 f6 29.Ke3 Kd7 30.Kd4 Kc6 31.Nb4–/+ Kb5 32.Nd5 Ne6 33.Ke4 Nc5 34.Kd4 Ne6 35.Kc3 Kc5 36.Ne7 g5 37.Nf5 a5 38.a4 b5 39.ab5 Kb5 40.Kb3 g6 41.Ne7 Nf4–+ 42.g3 Nh3 43.Ng6 a4 44.Ka3 Kc4 45.f4 g4 46.Ka4 Kd4 47.Nh4 Ke4 48.Kb4 Nf4 49.gf4 Kf4 50.Kc4 Ke4 51.Ng2 f5 52.Kc3 f4 53.Kd2 Kf3 54.Ne1= Kg3 55.Ke2 f3 56.Kf1 Kh2 57.Nf3 gf3 58.Kf2 Kh3 59.Kf3 ½–½. Fournier,Frederic (2010) – vucina (2120), Active (6/0), 2004.

6.Nf3 Bg4 7.Be2 Bf3 8.Bf3 Nc6 9.0-0 0-0 10.d3 Rb8 (10...Qb6 11.Ra2=) 11.Nd2 d5 12.Nb3 b6 (12...Bd6 13.Nd2=) 13.Rb1 d4?? (better is 13...Qd6 14.Nc5 Qc5=) 14.Bc6+- de3 15.Nc5 ef2 16.Rf2 (16.Kh1 bc5 17.Be5 Rb1 18.Qb1 Qe7+-) 16...bc5 17.Be5 (17.Qe2 Qd6 18.Bf3 Rb6+-) 17...Rb1 18.Qb1 Ng4 19.Bg3 Nf2 20.Bf2 Qd6 21.Be4 a6 22.Bg3 Qd4 23.Bf2 Qd6 24.Qd1 c4 25.Qh5 g6? 26.Qa5 cd3 27.Bd3 Ra8 28.Qc3 a5 29.Bd4 Qd7? 30.Bh8 Qa7 31.Kf1 Kf8 32.Qg7 Ke7 33.Qh7 Qe3 34.Qh4 g5 35.Qd4 Qc1 36.Ke2 Qa3 37.Qe5 Kf8 38.Bg7 Kg8+- 39.Qg5 Re8 40.Kd2 (40.Kd2 Qb4 41.Bc3 Kf8 42.Qg7 Ke7 43.Qf6 Kf8 44.Bb4 ab4 45.Bc4 Rd8 46.Qd8 Kg7 47.Qg5 Kf8 48.Qf6 Ke8 49.Qf7 Kd8 50.Be6 b3 51.Qd7) 1–0. Fournier,Frederic – jporcaro, Active, 2004.

5.Bb2 Qb6 6.Nc3 Qb2 7.Na4 Qa1 8.Qa1 Be7 9.Nf3 d6 10.Be2 Nf6 11.0-0 0-0 12.c4 Bg4 13.d3 e4 (13...Rfd8!?+/–) 14.de4+- Ne4 15.Qb1 Bf3 16.Bf3 Nd2 17.Qb7 Nf1?? (better is 17...Nf3 18.gf3 Rfc8+-) 18.Kf1 (18.Qc6?! Nd2 19.Be2 Rab8+/–; 18.Bc6?! Rab8 19.Qe7 Rb1+-) 18...Rab8 19.Qc6 (worse is 19.Bc6 Rb7 20.Bb7 Rb8–+) 19...Rfc8 20.Qd7 Kf8 (20...Rc4 21.Qa7 Re8 22.Nb6 Rc1 23.Ke2+-) 21.Qa7 Rb3 22.Nb6 Rd8 23.Nd5 Bg5 24.a4 Rb1 25.Ke2 Rb2 26.Ke1 Rb1 27.Bd1 Rc8 (27...Rb2 28.f4 Bh4 29.g3 Rh2 30.gh4+-) 28.c5! dc5 (28...Rc5 29.Qa8 Mate attack; 28...dc5 29.Qd7 Combination) 29.a5 c4 (29...g6 30.Qa6 Rd8 31.Qc4+-) 30.a6 (30.Qa6 Rbb8+-) 30...Ra1 (30...Bd8 31.Qd7 Ba5 32.Ke2+-) 31.Qb7 Rd8 32.f4 Bf6 33.a7 (better is 33.Qb4!? Kg8 34.Qc4 Ra8+-) 33...c3 34.Ke2 Ra7 35.Qa7 Rd5 36.Bb3 Rd2 37.Kf3 Be7 38.Qb8 Rd8 39.Qc7 Rd6 40.Qc3 Kg8 (40...h6 41.Qc4 Ke8 42.Qf7 Kd8 43.Ba4+-) 41.Qc7 Kf8 42.Qc4 (42.Qc4 Ke8 43.Qf7 Kd8 44.Ba4+-) 1–0. Fournier,Frederic (2150) – Gudmarsson,Larus (2150), Chess.com, 2013.

5.Bb2 Nf6 6.c4 0-0 7.Be2 Re8 8.d3 d5 9.Nd2 d4 10.e4 Be6 11.Ngf3 Qd6 12.0-0 Rad8 13.Nb3 Bb6 14.Qc2 h6 15.a4 Qb4?? (better is 15...Ne4 16.a5 Bc7 17.de4 d3+=) 16.Ba3+/– Qc3 (16...Qa4? 17.Bc5 Qb3 18.Qb3 Bc5 19.Qb5+-) 17.Qb1 Na5 18.Na5 Qa5 19.Bb4 Qa6 20.Ne5 Bc7 21.Nf3 Qc6 22.Qb2 Bg4 23.Rfb1 (worse is 23.Nd4 Rd4 24.Qd4 Be2+=) 23...b6 24.a5 (24.Nd4?! Rd4 25.Qd4 Be2+=) 24...b5 25.cb5 Qb5 26.Qa3 Qh5 27.Be7 Bf3+= 28.Bf3 Qh2 29.Kf1 Bd6 30.Bd6 Rd6 31.Rb7 a6 32.Rab1 Rc8 33.Qb3 Re6 34.Rb8 Ree8 35.Rc8 Rc8 36.Ke2 Qc7 37.Ra1 Qc3 38.Qc3+= dc3 39.d4 g5 40.Kd3 g4+/– 41.Bd1 c2+= 42.Bc2 Ne4 43.Ke4 Rc2 44.Ke3 Kg7 45.d5 Rc5 46.Kd4 Rc2 47.Ke3 Rc5 48.Rd1 Ra5 49.d6+/– Re5 50.Kf4 Re8 51.Kg4 a5 52.Kf5+- a4 53.g4 a3 54.f4 a2 55.Ra1 Re2 56.d7 Rd2 57.Ke5 Re2 58.Kd6 Rd2 ½–½. Fournier,Frederic – Mephisto Mondial, Match Active, 2000. (=1.a3 c5 2.b4 e5 3.bc5 Bc5 4.e3 Nc6)

5.c4 d5 6.cd5 Qd5 7.Nc3 =+.

5.c4 Nge7 6.Nc3 (6.Nf3 Nf5=) 6...0-0 7.Qb3 f5 (7...Na5 8.Qb5 d6 9.Nf3+=) 8.Bb2 b6 (8...d6 9.Nf3+=) 9.Na4 Ng6 (9...Qc7 10.Ne2 Ba6 11.d3=) 10.Be2 (10.Nc5 bc5 11.Qd3 Rb8+=) 10...Bb7 11.Qc3 Be7 12.Nf3 Bf6 13.c5 Kh8 (13...e4 14.Qb3 Kh8 15.Ng1–/+) 14.0-0 (14.Qc4!?+=) 14...e4–/+ 15.Nd4 Nd4 16.ed4 Nf4 17.Bc4 d5 18.cd6 Bc6 (18...Qd6 19.Rfc1–+) 19.g3 (better is 19.Qb4–/+) 19...Ba4–+ 20.gf4 Rc8 (20...Qd6?! 21.Qb4 Qd7 22.Ba6–+) 21.Qb4 b5! 22.Bb5 Bb5 23.Qb5 Rb8 (23...Qd6?! 24.Rab1 Qf4 25.Qa6–+) 24.Qd5 (24.Qf5 Rb2 25.Qd5 Qd7–+) 24...Rb2 25.d7 Qe7 26.Rac1 Rd2 27.Qf5 e3 28.d5 Qa3 29.fe3 Qe3 30.Kh1 Qe2 31.Qh3 Rd5 32.Rfe1 Qb5 33.Rc7 Rd2 34.Qf3 Rd7 35.Rcc1 Rd2 (35...Rd2 36.Rcd1 Rd1 37.Rd1 Qf5–+) 0–1. marre (2235) – Kill bill 5 (2540), Rated game, 3m + 0s, 2010.

5.c4 f5 6.Nf3 Nf6 7.d4+= ed4 8.ed4 Bb6 9.Be2 0-0 10.0-0 Bc7 11.d5 Na5 12.d6 Bb6 13.Nc3 Nh5? 14.c5!+- Bc5 15.Qd5 Kh8 16.Qc5 b6 17.Qc7 Qe8 18.Bb5 Qf7 19.Ne5 Qb3 20.Bg5 h6 21.Ng6 Kg8 22.Nf8 Kf8 23.Qd8 Kf7 24.Be2 Qc3 25.Bh5 g6 26.Rae1 gh5 27.Qe8 Kg7 28.Re7# 1–0. pierre – psywar, ChessHere.com, 2005.

5.Ne2 d5 =+.

5.Nf3 e4 6.d4 Be7=.

5.Qg4 Qf6 =+.

6.Bb2 0-0 7.Nc3 d5 8.cd5=+ Nd5 9.Nf3 a6 10.Ne4= Bd6 11.Nd6 Qd6=+ 12.d4 ed4 13.Nd4= Ne5 14.Be2 b5 15.Nf3 Nc4 16.Bc4+/– bc4 17.Rc1 c3 18.Rc3 Bb7 19.0-0 Rfd8 20.Rd3 Qe7 21.Qb3 Rd6 22.Bd4 Rg6 23.Bc5!+- Qe4?? 24.Qb7 (24…Rg2 25.Kh1+-) 1–0. Gross,Wilhelm – Daconto,Ricardo, corr 3GMM–08, 1997.

6.Bb2 Qb6 7.Nc3 Qb2 8.Na4 Qa3 9.Ra3 Ba3 10.Nf3 d6 (10...e4 11.Ng5+=) 11.Be2 (11.Qa1 Bb4+=) 11...e4 (11...Bb4 12.0-0=) 12.Nd4 Bb4 13.0-0 (13.Qb3 Rb8+=) 13...0-0 14.Nc6 bc6 15.d4 ed3 16.Qd3 ½–½. Krivoshapko,Alexander (2055) – Savostjanov,Igor (2085), Omsk op, 2008.

6.Nc3 0-0 7.Qf3 =+.

6.Nc3 b6 7.Be2 Bb7 8.Nf3 Qe7 9.d4= ed4 10.ed4 Bd6 11.0-0 0-0 12.Bd3 h6 13.Nb5 Bb8 14.Re1+/– Qd8 15.d5 Na5 16.Bd2 a6 17.Ba5 ab5 18.Bb4 Re8 19.Qd2 bc4 20.Bc4 Ng4 21.Qd4 Nf6 22.Bb3 d6 23.Re8 Ne8 24.Bc3 Nf6 25.Nh4 Bc8 26.Bc2 b5 27.Qd3 Ba7 28.Re1 Bc5? 29.h3?? Kf8 30.Bb2 b4 31.ab4 Bb4 32.Re3 Ra5 33.Rf3 Qe8 34.Bf6+/– Qe1 35.Kh2 gf6 36.Qh7 Qe5 37.g3 f5 38.Bf5+- Bb7?? 39.Ng6! (39...fg6 40.Bg6 Qf6 41.Rf6#) 1–0. Mueller,P – Diener,Rudolf, corr SOK–89–43, 1989.

6.Nc3 d5 7.cd5 Nd5 8.Nd5 Qd5 9.d3 –/+.

6.Nf3 0-0 =+.

6.Nf3 Qe7 =+.

5.Bb2 Nc6 6.Bb5 Qc7? (6...Bd6) 7.Qh5 Nf6 8.Qe5 Qe5 9.Be5–/+ 0-0 10.Bf6 gf6 11.Nc3 Bf5 12.Nd5 Kg7 13.Nf3 Be4 14.Bc6 bc6 15.Nc7 Rad8 16.Ke2 Bc2 17.d4 Bd6 18.Na6 Ba4 19.Nb4 1–0. Trkn – Mark Mooney, itsyourturn.com, 2001.

5.Bb2 Nc6 6.Bb5 f6 7.d4 ed4 8.ed4 Bd6=.

5.Bb2 Nc6 A) 6.Be2 Nf6 7.Nf3 e4 8.Ne5 0-0=+; B) 6.Qh5 Bd6 7.f4 Qb6 8.Bc3 d4–/+; C) 6.Ne2 Bg4 7.d4 Qb6 8.Ra2 ed4=+; D) 6.Nf3 D1) 6...Bg4 7.h3 Bf3 8.Qf3 Qb6=; D2) 6...Nf6 7.Ne5 0-0=+ 8.Nd3 Bd6+=; D3) 6...f6 7.d4 Qb6 8.Ra2 ed4=; D4) 6...d4 7.Bb5 Bg4 8.h3 Qb6=; D5) 6...Bd6 7.Bb5 Qc7 8.c4 dc4=.

5.Bb2 Qc7 6.Nf3 Nc6 7.Ne5 Ne5 8.f4 d4 +=.

5.Bb2 Bd6 A) 6.Nc3 Nf6 7.Nb5 Nc6 8.Nd6 Qd6=; B) 6.Be2 Nf6 7.Nc3 Nc6 8.Nf3 e4=+; C) 6.Nf3 Nd7 7.c4 Ngf6 8.c5 Bc7=+; D) 6.f4 ef4 7.ef4 Bf4 8.Bb5 Kf8=+; E) 6.d4 e4 7.c4 dc4 8.Nd2 Nf6=.

5.Bb2 Nd7 A) 6.Nf3 Bd6 7.c4 Ngf6 8.c5 Bc7=+; B) 6.d4 Qb6 7.Bc3 ed4 8.Bd4 Bd4=; C) 6.Bb5 Bd6 7.f4 Qb6 8.Qe2 f6=.

5.d4 Bd6 A) 6.c4 Nf6 7.c5 Bc7 8.Nf3 e4=+; B) 6.Bb2 e4 7.c4 dc4 8.Nd2 Nf6=; C) 6.Nd2 ed4 7.ed4 Nc6 8.Ngf3 Nf6=; D) 6.Bd2 ed4 7.ed4 Nc6 8.Bb5 Nge7=+; E) 6.de5 Be5 7.Ra2 Nc6 8.Nf3 Bg4=.

5.d4 Bd6 6.Nf3 =+.

5.Nf3 e4 A) 6.Ne5 Ne7 7.d4 Bd6 8.Qh5 0-0=+; B) 6.d4 Bd6 7.Ne5 Ne7 8.Qh5 0-0=+; C) 6.Bb5 Bd7 7.Bd7 Nd7 8.Bb2 Ngf6=+; D) 6.Nd4 Nf6 7.Bb5 Bd7 8.Bd7 Nbd7=+.

6.ed4 Bb6 7.Nf3 Nc6 8.Bb5 Nf6=.

6.ed4 Bd6 7.Nf3=+ Nc6 8.c4 Bg4=.

6.ed4 Qe7 7.Be2 Bd6 8.Nc3 Qd8=.

6.ed4 Be7 7.Bd3 Nc6 8.Nf3 Bg4=.

6.ed4 Qf6 7.Bb5 Bd7 8.Qe2 Ne7 9.c3 Bb6 10.Nf3=+ Bb5 11.Qb5 Qc6 12.Qd3 0-0 13.0-0 Nd7 14.a4 Ba5 15.Bb2 Nb6 16.Ne5 Qc7 17.Qb5 Nc4?? 18.Nc4+/– dc4 19.Nd2 Rac8 20.Nc4 Bc3 21.Bc3 Qc4 22.Qb7?? Rc7–+ (23.Qb1 Qc3–+; 22...Qc3?! 23.Qe7 Qd4 24.Rfd1=) 0–1. Trkn – Pijean, itsyourturn.com, 2001.

6.ed4 Qf6 7.Qe2 Ne7 8.Nf3 Bd4=.

6.ed4 Qf6 7.Nf3 Bg4 8.Qe2 Kf8=.

6.c4 0-0 A) 7.Nc3 d6 8.d3 Bf5 9.de4 Ne4=; B) 7.d4 Bb6 8.Nd2 Ba5 9.Rc1 d5=; C) 7.Qc2 d6 8.d3 Re8 9.Nc3 Bf5=+; D) 7.d3 d6 8.Nd2 ed3 9.Bd3 Nc6=.

6.c4 b6 A) 7.Nc3 Bb7 8.Nd5 Nd5 9.cd5 Qh4=; B) 7.d3 Bb7 8.de4 Ne4 9.Qg4 Rg8=; C) 7.f3 Bb7 8.fe4 Ne4 9.Qg4 Bf8=; D) 7.d4 Be7 8.Nc3 0-0 9.g4 d5=.

6.c4 Qb6 A) 7.Ra2 0-0 8.d3 Re8 9.Nd2 ed3=; B) 7.Qc2 0-0 8.d3 Re8 9.Nc3 Qa5=; C) 7.Bc3 d5 8.cd5 0-0 9.d4 Bd6=; D) 7.Be5 0-0 8.Nc3 Be7 9.Bd4 Qa5=; E) 7.Bf6 Qf6 8.Nc3 Qe6 9.Nd5 Na6=.

6.c4 d6 A) 7.d4 Bb6 8.Nd2 0-0 9.Ne2 Ba5=; B) 7.Nc3 0-0 8.d3 Bf5 9.de4 Ne4=; C) 7.Qb3 Nc6 8.d4 Bb6 9.Nd2 Ba5=; D) 7.Ra2 0-0 8.d3 Nbd7 9.Nd2 ed3=+; E) 7.d3 Qe7 8.Nd2 ed3 9.Bd3 Nc6=.

6.d3 A) 6...Qb6 A1) 7.Be5 d5 8.Nc3 Nbd7 9.Rb1 Qd8=+; A2) 7.Ra2 d5 8.Nd2 Bf5 9.de4 de4=; A3) 7.Bc3 d5 8.Nd2 Nbd7 9.Ne2 0-0=+; A4) 7.Qc1 d5 8.Nd2 Nbd7 9.Rb1 Qe6=; A5) 7.Bf6 Qf6 8.d4 Bb6 9.Qg4 Qg6=; B) 6...d5 7.de4 Qb6 8.Bf6 Qf6 9.c3 de4=; C) 6...0-0 C1) 7.de4 Ne4 8.Nc3 Qb6 9.Ne4 Qb2=+; C2) 7.Ne2 d5 8.de4 Ne4 9.Nbc3 Nc3=+; C3) 7.Nd2 d5 8.c4 d4 9.ed4 Bd4=+; C4) 7.Be2 d5 8.de4 Qb6 9.Bf6 Qf6=+; C5) 7.c4 d6 8.Nd2 Bf5 9.Bf6 Qf6=.

6.d4 Qb6 A) 7.Bc3 Be7 8.d5 0-0 9.Ne2 d6=; B) 7.Ra2 Be7 8.d5 d6 9.Bd4 Qa5=+; C) 7.Bc1 Be7 8.c4 0-0 9.Nc3 Qc7=+; D) 7.Qc1 Be7 8.c4 0-0 9.Nc3 Qa5=.

6.d4 Bb6 A) 7.Nd2 d5 8.Be2 0-0 9.c4 Nc6=+; B) 7.c4 0-0 8.Nd2 d5 9.Rc1 Be6=; C) 7.d5 Ba5 8.Nd2 d6 9.Ne2 Nd5=.

6.d4 Bd6 A) 7.Ne2 Qa5 8.Bc3 Qf5 9.Ng3 Bg3=; B) 7.d5 0-0 8.Nd2 Re8 9.Nh3 Be5=; C) 7.Nc3 0-0 8.d5 Be5 9.Qd2 d6=; D) 7.c4 Bc7 8.Nc3 0-0 9.Nge2 Ba5=; E) 7.Nd2 Be7 8.c4 d5 9.Qb3 dc4=.

6.d4 Be7 A) 7.d5=+ Qb6 8.Ra2 d6 9.Bd4 Qa5=+; B) 7.Nd2 Qa5 8.Ne2 d5 9.c4 dc4=; C) 7.Bc3 d5 8.Bb4 0-0 9.Nd2 Bg4=+; D) 7.Be2 Qa5 8.Bc3 Qg5 9.g4 Qh4=+; E) 7.c4 0-0 8.d5 d6 9.Ne2 Nbd7=.

6.Bf6!? Qf6 7.Nc3= Qf5 8.f3 d5 9.Bb5 Nc6 =+.

7.cd3 0-0 8.Nd2 d5 9.Rc1 Bd6=.

7.cd3 0-0 8.d4 A) 8...Qb6 9.Qc2= Be7=; B) 8...Be7 9.d5 Qb6=.

7.cd3 Na6 8.d4 Qb6 9.Bc3 Be7=.

7.cd3 Qb6 8.Qc2 0-0 9.Bf6 Qf6=.

7.cd3 Nc6 8.Qf3 Be7 9.Nd2 d5=.

7.cd3 d5 8.Nf3 Nc6 9.Be2 0-0 10.0-0= d4 11.Qc2 Qd6 12.e4 Ne5 13.Nbd2 Nf3 14.Nf3 Qb6? 15.Nd2?? Be6= 16.Bd1 Rac8=+ 17.Qa4?? Qb2–+ 18.Nb3 Bb3 19.Bb3 Qe2 20.Ra2 Qd3 21.Bc2 Qc3 (22.e5 d3 23.Bd3 Qe5–+) 0–1. Trkn – oohay, itsyourturn.com, 2001.

7.cd3 d6 8.d4 Bb6 9.Bb5 Bd7=.

7.Bd3 d5 8.Nf3 0-0 9.0-0 Nc6=.

4.Bb2 cb4 5.ab4 Bb4 6.Be5 Nc6 7.Bf6 Qf6= (worse 7...gf6 8.c3 Be7 9.Bc4+=).

4.Bb2 cb4 5.ab4 Bb4 6.Be5 Ne4 7.Qg4 d5 8.Qg7+/–.

4.Bb2 cb4 5.ab4 Bb4 6.Be5 Qe7 7.Bf6 Qe4 8.Qe2 Qe2 9.Ne2 gf6=.

4.Bb2 cb4 5.f4? d5 (5...ef4 6.Qf3 d5 7.e5–/+) 6.fe5 (6.ed5!? Nd5 7.Be5=+) 6...Ne4–/+ 7.Nf3 Qb6 (7...Bc5 8.ab4 Nf2 9.Bb5 Nc6 10.Qe2 Nh1 11.bc5–/+) 8.Bd4 Bc5 9.Bc5 Qc5 10.d4 Qa5 11.Nfd2 Nc6 12.Nb3 (12.Ne4 de4 13.Bc4 Qb6–+) 12...Qd8 13.N1d2?? (better 13.g3–/+) 13...Qh4–+ 14.g3 Ng3! 15.Nf3 (15.hg3 Qh1 Pinning (15...Qh1 Deflection)) 15…Qe4 (15...Qe4 16.Kf2 Nh1 17.Kg1 Bg4–+) 0–1. Carneiro,Vitor Roberto Castr (2245) – Mendonca,MN (2340), Sao Paulo Braga Open, 2014. (=1.e4 c5 2.a3 e5 3.b4 Nf6)

4.Nc3 cb4 5.ab4 Bb4 6.Bc4 Qc7 7.Bb3 (7.Bd3!?–/+) 7...Bc3–+ 8.dc3 Ne4 9.Ne2 0-0 10.0-0 d6 11.Ng3 Nc5 (11...Qc3?! 12.Ra3 Qc6 13.Bd5+=) 12.Bd5 Nc6 13.f4 Be6 14.f5 Bd5 15.Qd5 Ne7 16.Qf3 f6 17.Qg4 d5 18.Bh6 Rf7 19.Nh5 Nc6 20.Be3 b6 21.Rf3 (21.Bc5 bc5 22.Rfd1 Rd8–+) 21...Kf8 (21...Na5!? 22.Rd1 Rd8 23.Kh1–+) 22.Rh3 Ke8 (better is 22...Na5!?–+) 23.Ng3 h6 24.Nh5 Ne4 (24...Kf8!? 25.Bc5 bc5 26.c4–+) 25.c4–/+ Ng5 26.Bg5 fg5 (worse is 26...hg5 27.Ng7 Rg7 28.Rh8 Ke7 29.Ra8+/–) 27.cd5 Nd4 28.Qe4 Nf5 (28...Rf5 29.d6 Qc8 30.Ng7 Kd8 31.Rh6+- (worse is 31.Nf5 Nf5 32.d7 Qc5 33.Kh1 Rb8 34.Qf5 a5+-); 28...Nc2?! 29.Rc1 Rc8 30.Rf3=) 29.Rd1 Rd8 30.Kh1 g6 31.Ng3 Nh4 32.Ne2 Qd6 33.Rhd3 Kf8 34.Nc3 Kg7 35.Qe2 Nf5 36.Ne4 Qb4 37.c3 Qe7 38.d6 Qe6 39.Rd5 Rfd7 40.Qd2 a5 41.c4 Rf7 42.c5 Nd4 43.Rd4 ed4 44.Qd4 Kh7 45.c6 Rf4 46.c7? Rdf8–+ 47.h3?? Re4 48.Qe4 Qe4 49.d7 Rf2 50.Rg1 Rf3! (50...Rf3 51.gf3 Qf3 52.Kh2 Qf4 53.Kh1 Qc7–+) 0–1. Breslavska,G (2200) – Orlyanskaya,D (2050), ch–UKR w, Evpatoria UKR, 2009. (=1.e4 c5 2.a3 e5 3.b4)

4.Nc3 cb4 5.ab4 Bb4 6.Qf3 –/+.

4.Nc3 d5 5.ed5 (5.Bb5 Bd7 6.Bd7 A) < 6...Kd7 7.Nd5 (< 7.ed5 cb4 8.ab4 Bb4=) 7...cb4 8.Nb4+=; B) 6...Nbd7?! 7.Nd5 Nd5 8.ed5=; C) 6...Qd7 7.Nd5 Nd5 8.ed5 Qd5=+) 5...cb4=+ 6.ab4 Nd5 7.Ra5 Be6 8.Nd5 Bd5 9.c4 Be6 10.Re5 Bd6 11.Re4 0-0 12.Rd4?? Nc6–+ 13.Re4 Nb4 14.Ba3? a5 15.Nf3? Qb6 16.Qb1? Rfe8?? 17.Qb3?? Bf5–+ 18.Re8 Re8 19.Be2 Nc2 20.Qc2 Bc2 21.0-0 Ba3 22.Re1 0–1. rookie2 – BLACKBEARD, ChessWorld.net, 2004.

4.bc5 Bc5 5.Nc3 d5 6.Bb5 Nc6 7.Nf3? (7.ed5 Nd5 8.Ne4 Qb6=+) 7...0-0 (7...de4!? 8.Ng5-+) 8.Bc6 (8.ed5 Nd5 9.Ne4 Bd4=+) 8...bc6-/+ 9.0-0 (9.ed5 e4 (9...Nd5?! 10.Ne4 Bb6 11.0-0=+) 10.d4 ef3 11.dc5 Qa5-+) 9...Bd4 (9...Ne4 10.Na4 Bd6 11.d3-+) 10.Rb1? (10.ed5!? Bc3 11.dc3=+) 10...de4 (10...Bc3 11.dc3 Ne4 12.Qd3-+) 11.Ng5? (better 11.Nd4!? ed4 12.Ne2-/+) 11...Bc3-+ 12.dc3 h6 13.Nh3 Bh3 14.gh3 Qc8 15.Kg2 Qf5 16.Be3 Rfd8 17.Qe2 Nh5 (17...Rd7 18.Rbd1-+) 18.Kh1 (18.Qg4 Nf4 19.Kh1 Qf6-+) 18...Nf4 (18...Qh3 19.Rg1 Nf6 20.Rg3-+) 19.Qg4 Qg4 (19...Qf6 20.f3 Nd5 21.Rbe1-+) 20.hg4 Nd5 21.Bc5 (21.Rfe1 Rd7-+) 21...Nc3 22.Rb7 (22.Rb4 Rd2 23.Rc4 Nd5-+ (23...Rc2?! 24.Bb4=)) 22...Ne2 (22...Rd2 23.Rc1-+) 23.Re1 Nf4 (23...Rd2!? 24.c4-+) 24.Be3-/+ Re8 (24...Nd5 25.Ba7 Nf6 26.h3-/+) 25.h4 (25.Ba7 Rad8=+) 25...g5 (25...a6 26.Ba7-/+) 26.hg5 hg5 27.a4 (27.Ba7!? Kg7 28.Re4-/+) 27...Kg7-+ 28.a5? (28.Kg1 a5-+) 28...Kg6 (28...Re6!? 29.Kg1 Rh8 30.Rb3-+) 29.a6 (29.Kg1 a6-/+) 29...Rh8-+ 30.Kg1 Rh4 31.Bf4 gf4 (better 31...ef4!? 32.Re4 f3-+ (worse 32...Rg4 33.Kf1-/+)) 32.Re4-/+ f3 33.Rc7?? (33.Rb3 Rah8 34.Rf3 Rh1 35.Kg2 R8h2 36.Kg3 Rh3 37.Kg2 R1h2 38.Kg1 Rf3 39.Kh2 Rf2 40.Kg3 Rc2 41.Re5-+) 33...Rah8 34.Rc6 f6 (34...Kg7 35.Rg6 fg6 36.Re5 Rh1) 35.g5 (35.Rf6 Kf6 36.g5 Kg5 37.Rh4 Kh4 38.Kf1 e4 39.Kg1 Rd8 40.Kh2 e3 41.c4 ef2 42.c5 f1Q 43.c6 Rd2) 35…Rh1 0-1. Fide15 (2410) - zsolti_83 (2465), Rated Bullet game, lichess.org, 2018. (=1.e4 c5 2.a3 e5 3.b4)

4.d3 cb4!? 5.ab4 Bb4 6.c3 Be7 –/+.

4.d3 Nc6 5.c3+= a6 6.Be3 c4 (6...d5!? 7.bc5 d4 8.cd4 ed4+=) 7.f3 d5 8.dc4 de4 9.Nd2 ef3 10.Ngf3 Bd6 11.c5 Bb8 (11...Bc7 12.Bc4=) 12.Nc4 Nd5 13.Qd2 Be6 14.Ng5 Ne3 15.Qd8 Nd8 16.Ne3 Bc7 17.Bc4 Bc4 18.Nc4 f6 19.Ne4 Nf7 20.0-0-0 Ke7 21.Ned6 (21.Ncd6!? Bd6 22.cd6 (worse is 22.Nd6 Nd6 23.Rd6 Rhd8=) 22...Kd7 23.c4+=) 21...Bd6= 22.cd6 Ke6 23.Nb6 Rad8 (23...Nd6!? 24.Na8 Ra8=) 24.d7+= e4 25.Rd4 f5 26.Rhd1 h5 27.Nc4 (27.Na4 Ke7+/–) 27...Ke7 28.Rd5 Ke6 29.Na5 Rb8 30.c4 Rhd8 (30...h4 31.c5+/–) 31.c5+- Ne5 32.Rd6 White prepares the advance c6 (better is 32.Re5!? Ke5 33.c6+-) 32...Ke7+/– 33.Rb6 (better is 33.R1d5 Nf7 34.Rb6 Rd7 35.Nc6 bc6 36.Rd7 (36.Rb8?? Rd5 37.Rb7 Kf6–+) 36...Kd7 37.Rb8+/–) 33...Nd3?? (better is 33...Rd7 34.Rd7 Kd7+=) 34.Rd3!+- ed3 35.c6 Kd6 36.Rb7 Rb7? (36...Ra8+-) 37.Nb7 Kc6 38.Nd8 Kd7 39.Nf7 Ke6 40.Ng5 Kd5 41.Kd2 Kc4 42.Ne6 (42.Ne6 Kb3 43.Kd3 Ka3 44.Kc4+-) 1–0. Kenyon,Scott (1875) – Foord,Dominic (1805), BCF–chT4a, 2005. (=1.e4 c5 2.a3 e5 3.b4 Nf6)

4.Nf3 cb4!? 5.ab4 Bb4–/+ (worse is 5...Ne4 6.Qe2 d5 7.Nc3+=).

4.Nf3 Qc7 5.Bb2 (5.Nc3 Nc6 6.Nd5 Nd5 7.ed5 Ne7=) 5...Nc6= 6.Nc3 Nd4 (6...cb4!? 7.ab4 Nb4=) 7.Nb5+= Nb5 8.Bb5 cb4 (8...Bd6!?+=) 9.Be5+/– Qb6 10.Qe2 (better is 10.a4+/–) 10...Be7? (better is 10...ba3 11.0-0 Be7+=) 11.ab4+- 0-0 12.Bd4 Qc7 13.c3 d6 14.0-0 (14.Ra7 Ra7 15.Ba7 b6–/+; 14.Ba7 b6–/+) 14...Bg4 15.Qe3 (15.Ba7 b6 16.Bb6 Qb6+=) 15...a6 16.Bb6 Qc8 17.Ba4 Nd7 18.Bd4 f6 (18...Qc7 19.Ng5+-) 19.Bb3 Kh8 20.Nh4 (better is 20.h3 Bh5 21.Nh4+-) 20...Re8?? (20...Ne5+-) 21.f3 Bh5 (21...Nc5 22.bc5 (22.fg4?! Nb3 23.Rab1 Nd4 24.Qd4 Qg4+/–) 22...dc5 23.fg4 Qg4 24.Rf4+-) 22.g4 g5 (22...Nc5 23.Bd5 Bg4 24.fg4 Ne6+-) 23.Qg5 1–0. Vila Cairo,Gerard (1985) – Asensio Gil,Jesus (1905), Obert de la Delegacio de Tarragona. Mem, 2016. (=1.e4 c5 2.a3 e5 3.b4 Nf6)

4.Nf3 d5 5.ed5= e4 6.Bb5 (6.Ne5!? cb4 7.Bb2=) 6...Bd7=+ 7.Bd7 Qd7 8.Ne5 Qd5 9.Bb2 cb4 10.ab4 (10.0-0!?=+) 10...Bb4-/+ 11.0-0 0-0 12.d4 ed3 (12...Nc6 13.c4 Qd6 14.Na3-/+) 13.Nd3 Be7 14.Nc3 Qf5 15.Re1 Nc6 16.Qe2 (16.Ra4 Rad8-/+) 16...Rfe8 17.Qf1 h6 18.Rad1 (18.Nd1 Nd5-/+) 18...a5 19.Ne2 a4 20.Ng3 Qg5 21.Bc3 (21.Ne5 a3 22.Bc1 Qh4-/+) 21...a3 (better 21...Rad8-+) 22.Bd2? (better 22.Ne5 a2 23.Bd2 Qe5 24.Re5 Ne5 25.Bc3-/+) 22...Qb5 23.Ra1 (23.Nf4 Qf1 24.Kf1 a2-+) 23...a2 24.f4 (24.Bc3 Nd5 25.Bb2 Ncb4 26.Nb4 Qb4-+) 24...Ng4 (24...Nd4 25.Rec1 Bc5 26.Kh1-+) 25.h3 (25.Ne4 Qd5 26.Qf3 h5-+) 25...Nf6 26.Kh1 (26.Qf2 Qc4 27.Bc1 Bb4 28.Re8 Ne8-+) 26...Nh5 (better 26...Nd4!? 27.Re5 Qc6 28.Ba5 Qc2 29.Nc1-+) 27.f5 (27.Nh5 Qh5 28.Nc1-+) 27…Ng3 (27...Ng3 28.Kg1 Nf1-+) 0-1. MikeyG (2450) - Lance5500 (2680), lichess.org, 2016. (=1.e4 c5 2.b4 e5 3.a3 Nf6)

3.Bb2 f6 4.e4 (--> 1.b4 e5 2.Bb2 f6 3.e4 c6 4.a3).

3.c4 h6 4.e3 (4.Bb2 d6=) 4...Nf6 5.Bb2 d6 6.Nf3 g6 (6...e4 7.Nd4=) 7.h3 (7.Be2 Bg7+=) 7...Bg7 (7...e4 8.Nd4=) 8.Be2 (8.Nc3 0-0=) 8...0-0 (8...e4 9.Nd4=) 9.0-0 b6 (9...e4 10.Nd4=) 10.Re1. divergence (1735) – gurvinder372, internet, 2007.

3.e3 d5 4.Bb2 Bd6 5.Nf3 =.

3.e3 d5 A) 4.Bb2 A1) 4...e4 5.Nc3 (5.Nh3 Nf6 6.Nf4 Bd6 7.Bd4 0-0 8.Nc3 Nbd7 9.Be2; 5.d3 a5 6.de4 de4 7.Qd8 Kd8 8.b5 cb5 9.Bb5) 5...Nf6 6.Nge2 a5 7.Nd4 ab4 8.ab4 Ra1 9.Qa1; A2) 4...a5 5.Be5 (5.Nf3 e4 6.Nd4 ab4 7.ab4 Ra1 8.Ba1 Nf6 9.Bc3; 5.ba5 e4 6.c4 Nf6 7.Nc3 Ra5 8.Qc2 Bd6 9.Nge2) 5...Nd7 6.Bd4 ab4 7.ab4 Ra1 8.Ba1 Ngf6 9.b5; B) 4.Nc3 B1) 4...Nf6 5.Bb2 (5.Nf3 Bd6 6.Be2 0-0 7.0-0 Bf5 8.Bd3 Bd3 9.cd3; 5.Be2 Bd6 6.Nf3 0-0 7.0-0 Bf5 8.Bd3 Bd3 9.cd3) 5...Bd6 6.Nf3 0-0 7.Be2 Bf5 8.0-0 Nbd7 9.Bd3; B2) 4...a5 5.Bb2 (5.ba5 Nf6 6.Nf3 Bd6 7.a4 Ra5 8.Be2 0-0 9.Bb2; 5.b5 Nf6 6.Nf3 e4 7.Nd4 Bd6 8.d3 c5 9.Nde2) 5...Bd6 6.Nf3 Nf6 7.Be2 0-0 8.0-0 Bf5 9.b5; B3) 4...Nd7 5.Nf3 (5.Bb2 Ngf6 6.Nf3 Bd6 7.Be2 0-0 8.0-0 Nb6 9.d3; 5.Be2 Ngf6 6.Nf3 Bd6 7.0-0 0-0 8.Bb2 Nb6 9.d3) 5...Ngf6 6.Bb2 Bd6 7.Be2 0-0 8.0-0 Nb6 9.d3; B4) 4...Bd6 5.Bb2 (5.Nf3 Nf6 6.Be2 0-0 7.0-0 Bf5 8.Bb2 Nbd7 9.Bd3; 5.Be2 Nf6 6.Nf3 0-0 7.0-0 Bf5 8.Bd3 Bd3 9.cd3) 5...Nf6 6.Nf3 0-0 7.Be2 Bf5 8.0-0 Nbd7 9.Bd3; C) 4.Be2 C1) 4...Nd7 5.Bb2 (5.Nc3 Ngf6 6.Nf3 Bd6 7.0-0 0-0 8.Bb2 Nb6 9.d3; 5.Nf3 Ngf6 6.Nc3 Bd6 7.0-0 0-0 8.Bb2 Nb6 9.d3) 5...Ngf6 6.Nf3 Bd6 7.Nc3 0-0 8.0-0 Nb6 9.d3; C2) 4...Bd6 5.c4 (5.Nf3 Nf6 6.Bb2 Nbd7 7.Nc3 0-0 8.0-0 Nb6 9.d3; 5.Bb2 Nf6 6.Nf3 Nbd7 7.Nc3 0-0 8.0-0 Nb6 9.d3) 5...e4 6.Nc3 Nf6 7.Nh3 0-0 8.Bb2 Bh3 9.gh3; C3) 4...a5 5.Bb2 (5.b5 Nf6 6.Bb2 Bd6 7.c4 dc4 8.Nc3 Be6 9.Nf3; 5.ba5 Nf6 6.Nf3 Bd6 7.c4 0-0 8.Nc3 dc4 9.Bc4) 5...Nf6 6.Be5 Nbd7 7.Bb2 ab4 8.Nf3 Nb6 9.ab4; C4) 4...Nf6 5.Nf3 (5.Bb2 Nbd7 6.Nf3 Bd6 7.Nc3 0-0 8.0-0 Nb6 9.d3; 5.Nc3 Bd6 6.Nf3 0-0 7.0-0 Bf5 8.Bb2 Nbd7 9.Bd3) 5...Bd6 6.Bb2 Nbd7 7.0-0 0-0 8.Nc3 Nb6 9.d3; D) 4.Nf3 D1) 4...Nf6 5.Ne5 Bd6 6.Bb2 0-0 7.Nd3 Bf5 8.Nc3 Nbd7 9.Be2; D2) 4...Nd7 5.Bb2 (5.c4 e4 6.Nd4 dc4 7.Nc3 Ngf6 8.Qc2 a5 9.ba5) 5...Bd6 6.c4 dc4 7.Bc4 Ngf6 8.Nc3 0-0 9.Qc2; D3) 4...e4 5.Nd4 a5 6.ba5 c5 7.Nb5 Nc6 8.Bb2 Be6 9.Be2; D4) 4...Bd6 5.Bb2 (5.c4 Nf6 6.Bb2 e4 7.Nd4 0-0 8.Nc3 Be5 9.Qc2; 5.Be2 Nf6 6.Nc3 0-0 7.0-0 Bf5 8.d3 a5 9.Bb2) 5...Nd7 6.c4 dc4 7.Bc4 Ngf6 8.Nc3 0-0 9.Qc2.

3.e3 e4 A) 4.Ne2 d5 5.d3 (5.Ng3 Nf6 6.Nc3 a5 7.b5 Bd6 8.d3 0-0 9.de4; 5.Nbc3 Nf6 6.Nd4 a5 7.Bb2 ab4 8.ab4 Ra1 9.Qa1) 5...a5 6.b5 Nf6 7.Ng3 h5 8.Nc3 h4 9.Nge2; B) 4.d3 B1) 4...Nf6 5.de4 (5.Nc3 a5 6.ba5 d5 7.de4 de4 8.Qd8 Kd8 9.Bd2) 5...Ne4 6.Bb2 d5 7.Nd2 a5 8.b5 Nf6 9.c4; B2) 4...Qf6 5.c3 (5.Ra2 a5 6.ba5 Qe6 7.Nc3 Nf6 8.Nge2 ed3 9.cd3) 5...d5 6.de4 Bd6 7.Nf3 Ne7 8.Bb2 0-0 9.Nbd2; B3) 4...a5 5.de4 ab4 6.Nf3 d5 7.e5 Qb6 8.Bd3 Nd7 9.0-0; B4) 4...d5 5.de4 (5.Bb2 a5 6.de4 de4 7.Qd8 Kd8 8.b5 Nf6 9.Nd2; 5.Nc3 a5 6.ba5 Nf6 7.de4 de4 8.Qd8 Kd8 9.Bd2) 5...de4 6.Qd8 Kd8 7.Nd2 Nf6 8.Bb2 a5 9.b5; C) 4.Nh3 C1) 4...Nf6 5.Bb2 (5.Nc3 d5 6.d3 a5 7.b5 Bh3 8.gh3 Bd6 9.de4; 5.Nf4 d5 6.Nc3 Bd6 7.d3 a5 8.Bb2 ab4 9.ab4) 5...d5 6.c4 Bd6 7.cd5 cd5 8.Nf4 Bf4 9.ef4; C2) 4...a5 5.b5 Nf6 6.Nf4 d5 7.Nc3 Bd6 8.bc6 Nc6 9.Ncd5; C3) 4...d5 5.Nf4 (5.d3 a5 6.b5 cb5 7.de4 Bh3 8.gh3 de4 9.Qd8; 5.Nc3 Nf6 6.d3 a5 7.b5 Bh3 8.gh3 Bd6 9.de4) 5...Nf6 6.Bb2 Bd6 7.Bd4 Nbd7 8.Nc3 Qc7 9.Be2; D) 4.Nc3 D1) 4...Nf6 5.Nh3 (5.Nge2 a5 6.ba5 Qa5 7.Nd4 Na6 8.f3 d5 9.fe4; 5.f3 a5 6.ba5 d5 7.Nge2 Bd6 8.fe4 de4 9.Ng3) 5...d5 6.Bb2 Bd6 7.d3 ed3 8.Bd3 Bh3 9.gh3; D2) 4...d5 5.Nge2 (5.d3 a5 6.ba5 Nf6 7.de4 de4 8.Qd8 Kd8 9.Bd2; 5.Bb2 a5 6.Nh3 Nf6 7.Nf4 ab4 8.ab4 Ra1 9.Qa1) 5...Nf6 6.Nd4 a5 7.ba5 Bd6 8.a4 0-0 9.Ba3; D3) 4...a5 5.ba5 (5.Bb2 Nf6 6.Nh3 d5 7.Nf4 Bd6 8.Be2 0-0 9.0-0; 5.b5 Nf6 6.Nh3 d5 7.d3 Bh3 8.gh3 Bd6 9.de4) 5...Nf6 6.Nge2 Qa5 7.Nd4 Na6 8.Be2 Bd6 9.0-0.

3.e3 Be7 4.Bb2 (4.Nf3 A) 4...d5 5.Ne5 (5.Bb2 Nd7 6.Ne5 Ngf6 7.Nd3 0-0 8.Be2 a5 9.Bd4) 5...Nf6 6.Nc3 Nbd7 7.Nf3 0-0 8.Be2 a5 9.b5; B) 4...Nf6 5.Ne5 d5 6.Nc3 0-0 7.Nf3 Nbd7 8.Be2 a5 9.b5; C) 4...e4 5.Nd4 Nf6 6.Nc3 0-0 7.Be2 d6 8.Bb2 c5 9.Nb3) 4...Bf6 (4...d6 5.Nc3= (5.Nf3 Nf6 6.Nc3 0-0 7.Bc4 Nbd7 8.0-0 d5 9.Be2) 5...Nf6 6.Nf3 0-0 7.Bd3 Nbd7 8.0-0 d5 9.Be2; 4...Nf6 5.Be5 d5 6.Nc3 Nbd7 7.Bd4 a5 8.Nf3 0-0 9.Rb1; 4...d5 5.Be5 (5.Nf3 Nd7 6.Ne5 Ngf6 7.Nd3 0-0 8.Be2 a5 9.Bd4) 5...Nf6 6.Nc3 Nbd7 7.Bf4 a5 8.Bd3 0-0 9.Nf3; 4...c5 5.Nf3 (5.Be5 Nf6 6.bc5 Nc6 7.Bd6 Ne4 8.Nc3 Nd6 9.cd6; 5.bc5 Nc6 6.Nf3 Nf6 7.Ne5 Bc5 8.Ng4 Be7 9.Nf6) 5...Nf6 6.Be5 Nc6 7.bc5 Ne5 8.Ne5 Bc5 9.Nc3) 5.d4 (better 5.Nf3!?+- d6 6.Nc3 d5 7.g3 Ne7 8.Bg2 0-0 9.0-0) 5...ed4= (5...e4 6.Nc3 d5 7.f3 Bg5 8.fe4 Nf6 9.Nf3) 6.Bd4 d5 (6...a5 7.b5 Nh6 8.Nc3 Nf5 9.Bf6) 7.Nf3 Bg4 (7...Nh6 8.Bd3 0-0 9.0-0) 8.Be2 Nd7 9.0-0 Ne7 10.Nbd2 Bd4 11.Nd4 Be2 12.Qe2 0-0 13.c4 Ne5 14.Rfd1 Qb6 ½–½. Bott,Hans Joachim – Klein,Klaus, Baden–ch HT1, 1994.

3.e4 Nf6=.

3.Nf3 d6=.

3.Nf3 e4 4.Nd4 =+.

3.Nf3 f6 4.Nc3 d5 5.e3 Qe7 6.b5 Qe6 7.a4 e4 8.Nh4?? f5?? 9.Qh5 Qf7 10.Qg5? Be7–+ 11.Qg3 Qf6 12.bc6? Nc6–+ 13.Bb5 Qh6 14.Bc6? bc6–+ 15.0-0 Bh4 16.Qc7 Ne7 17.Ba3 f4 18.Qe7 Be7 19.Be7 Ke7 20.ef4 Qf4 21.g3 Qf3 22.Rae1 (22...Bh3 23.Nd5 cd5 24.Re4 de4 25.d4 Qg2; 22.Ra3 Kd8 23.Nb1–+). crystal palace – athar, ChessWorld.net, 2005.

4.d3 d5 5.Nf3 e4 6.de4 de4 7.Nfd2 Bf5 8.e3 Qe7 9.Bc4 b5 10.Be2 Nf6 11.Nc3 (better is 11.c4+=) 11...g6? (better is 11...a5!?=) 12.0-0 (better is 12.g4!? Bg4 13.Bg4 Ng4 14.Qg4+-) 12...Bg7+/– 13.Rb1 (13.g4!? Be6 14.g5+/–) 13...0-0 14.f3 (better is 14.g4!? Be6 15.Nce4 Ne4 16.Bg7 Kg7 17.Ne4+=) 14...ef3–/+ 15.Bf3 Qe3 16.Kh1 a6 (16...Rd8 17.Nc4 Qe8 18.Nd2–/+) 17.Re1+= Qf2 18.Re2 Qa7 19.Nde4 Ne4 20.Ne4 Be4 21.Be4 f5 22.Bf3 Qb6?? (22...Bb2!? 23.Rb2 Qf7+=) 23.Bg7 (23.Bd5 Kh8 24.Bg7 Kg7 25.Re7 Kf6 26.Qe1+-) 23...Kg7+= 24.Qd3 a5?? (24...Qd8 25.Qb3=) 25.Rbe1 (25.Re7 Kh6 26.Qd2 f4 27.Qe1+-) 25...Rf7 26.Qc3 Kg8?? (better is 26...Kh6+=) 27.Re8 Rf8 28.Rf8 Kf8 29.Qf6 Kg8 30.Re8 1–0. Fournier,Frederic (1720) – 64square, 5min+4s chess16.com, 2008.

4.Nf3 d6 5.e3 Nf6 6.c4 Nbd7 7.d3 Be7 8.Be2 0-0 9.0-0 a5 10.Nbd2 Re8 11.Qc2 Bf8 12.Rfe1 b6 13.Rac1 Bb7 14.b5 cb5 15.cb5 Qc2 16.Rc2 Rec8 17.Rec1 Rc2 18.Rc2 Rc8 19.Rc8 Bc8 20.a4 (20.Nc4!?+=) 20...Nc5+= 21.Bd1 (21.d4!? Na4 22.de5 Nb2 23.ef6+=) 21...Nd3–/+ 22.Ba3 Bb7 23.Bc2 Nb4 24.Bb3 Nd7 25.Nc4 (25.Bb4 ab4 26.Bc2 Nc5–/+) 25...g6 (25...Bf3 26.Bb4 ab4 27.gf3–/+) 26.Nfd2 d5 27.Nb2 Bc5 28.Bb4 Bb4 29.Nd3?? (better is 29.Nf1–+) 29…Bd2 0–1. Fournier,Frederic (1950) – SHILENITO (1740), Active, 2011.

4.c4 a5 5.b5 cb5 6.cb5 Be6 7.a4 (7.d4 e4 8.d5 Bf5+=) 7...Ne7 8.Nc3 Ng6 9.e3 Be7 10.Nf3 Nd7 11.Be2 b6 (11...d5 12.0-0=) 12.0-0 0-0 13.d4 e4 (13...Rc8 14.d5 Bf5 15.e4+=) 14.Nd2 (better is 14.Ne4!? d5 15.Ned2+/–) 14...d5= 15.f3 Nf6 (better is 15...ef3!? 16.Bf3 Nf6=) 16.fe4+/– Bb4 17.ed5 (17.e5 Bc3 18.Bc3 Ne4+/–) 17...Nd5 (better is 17...Bc3!? 18.Bc3 Nd5=) 18.Nd5+/– Bd5 19.Bf3 Re8 20.Bd5 Qd5 21.e4 Qg5 (21...Qd8!?+=) 22.Nc4+/– Re4 23.Nb6 (23.Qf3!? Qe7 24.Nb6+/–) 23...Rae8+= 24.Qb3 (24.Qf3 Nf4+=) 24...Nf4= 25.g3 (25.Qf3 Re2 26.Ba3 Rg2 27.Kh1 Bd2–+) 25...Ne2 Attacking the isolated pawn on d4 (25...Re3 26.Qc4 Rg3 27.Kh1–+) 26.Kh1= Ng3?? (better is 26...Qg6 27.Nd5 Nd4 28.Bd4 Rd4 29.Nb4 Rb4=) 27.Qg3+- Rg4 28.Qf2 f6 29.Rg1 Bd6 30.Rg4 Qg4 31.Rg1 Qe4 32.Qg2 Qb1 1–0. Fournier,Frederic (2085) – bvmgr (1985), Active, 2004.

4.c4 Nd7 5.e3 (5.Nf3 Ngf6=) 5...Ngf6 6.Nc3 (6.Nf3 a5=) 6...Be7 7.d4 0-0 8.Nf3 e4 (8...ed4 9.Qd4 c5 10.Qd2=) 9.Nd2 d5 10.Be2 Nb6 11.c5 Nbd7 12.b5 Re8 (12...cb5 13.Qb3 b6 14.c6=) 13.g4 (13.0-0=) 13...Nc5 (better 13...Nf8!?=) 14.dc5+- Bc5 15.Nb3 (15.Na4 Bf8+-) 15...Bd6 16.Nd4 c5 17.Nc2 Be5 18.g5 Qa5 (18...d4 19.ed4 cd4+=) 19.gf6?? (better 19.Qd2 Nd7 20.0-0-0+-) 19...Bc3=+ 20.Bc3 Qc3 21.Qd2 Qf6 22.0-0-0 (22.Rd1 Be6=+) 22…Be6–/+ (22...Qf2?! 23.Rdf1 Qg2 24.Qd5+=) ½–½. Farrington,Edward J (2010) – Gosling,Brian G E (1815), 15th South Wales International, 2018.

4.c4 Be6 5.e3 (5.d4 ed4 6.Qd4 Nf6=) 5...Nd7 (5...Nf6 6.d4 Nbd7 7.Nd2=) 6.Nf3 Ngf6 7.Be2 h6 (7...Be7 8.0-0=) 8.Nc3 (8.0-0 Be7=) 8...Be7 (8...Qe7 9.d4+=) 9.Qc2 (9.d4 0-0=) 9...d5 10.cd5 cd5 (< 10...Nd5 11.Nd5 Bd5 12.e4+/–) 11.Rc1 Rc8 12.Qb1 (12.Qa4 a6=) 12...0-0 13.0-0 Bd6 (13...Bg4 14.Qa2 e4 15.Nd4 Be2 16.Nce2=) 14.Nb5 Rc1 (14...Qb6 15.Nd6 Qd6 16.d4+=) 15.Rc1 Bb8 16.Qa1 (16.Qc2 Bg4=) 16...a6 (16...d4 17.ed4 e4 18.Ne1=) 17.Nc3 e4 (17...Qe7 18.d3=) 18.Nd4 Nb6 (18...Be5 19.d3=) 19.g3 (19.d3 Qd6 20.g3 Rc8=) 19...h5 (19...Bg4 20.Bg4 Ng4 21.f3 Nh2 22.fe4–/+) 20.a4 (20.d3 Bg4=) 20...Bh3 (20...Bg4 21.f3 ef3 22.Bf3=) 21.d3 ed3 22.Bd3 Nc4 23.Nce2 Nb2 24.Qb2 Qd7 25.b5 h4 26.Qc2 hg3 27.hg3 ab5 28.ab5 g6 29.Nf3 Kg7 30.Qc3 Qg4 31.Ne5 Be5 32.Qe5+= Qf3 33.Nf4 Rh8 34.Be2+- Qe4 35.Qe4 de4 36.Nh3 Rh3 37.Kg2 Rh8 38.Rc7 Rd8 39.Rb7 Rd2 40.Bc4 Ng4 41.Rf7+- Kh6 42.Kf1 Ne5 43.Rc7 Rb2 44.Bd5 Nf3 45.Rc5?? Rb1= 46.Kg2 Ne1 47.Kh3+/– Nd3 48.Rc2 Rb5+= 49.Be4 Rh5 50.Kg4 Rg5 51.Kf3 Ne1 52.Ke2 Nc2 53.Bc2 Kg7 54.Kf3 Kf6 55.Kg2 Rc5 56.Be4 Rc4 57.Bd5 Rc2 58.Be4 Ra2 59.Bd5 Rb2 60.Be4 Ra2 61.Bd3 Ra3 62.Bc4 Rc3 63.Bd5 Ra3 64.Kh3 Ra5 65.e4 g5? 66.Kg4 Ra1 67.f4 gf4 68.gf4 Re1 69.Kf3 Rf1 70.Ke3 Re1 71.Kd4?? Rd1 72.Ke3 Re1 73.Kf2 Ra1 74.Bc4 Ra3 75.Be2 Rc3 76.Bf3 Rb3 77.Kg3 Rb5 78.Kg4 Ra5 79.Be2 Rc5 80.Bd3 Ra5 81.Bc4 Ke7 82.e5 Ra4 83.Bd5 Rd4 84.Bb3 Rb4 85.Bc2 Rc4 86.Bh7 Rc1 87.Kf5 Re1 88.Bg8 Kf8 89.Bd5 Ke7 90.Bf3 Re3 91.Bg4 Re1 92.Kg5 Re4 93.e6 Re1 94.Bh3?? Rh1= 95.Bg4 Rf1?? 96.f5+- Rf2 97.Bh3 Rf3= 98.Bg4 Rf1 (98...Rf2 99.Kg6 Rf1+-) ½–½. Skulsky,Ian – Macskasy,Elod, Vancouver, 1987.

4.c4 Be7 5.Qc2 (5.e4 a5=) 5...Nh6 (5...a5 6.b5=) 6.d4 (6.Nf3 f5=) 6...ed4 7.Bd4 0-0 8.e3 Bf5 (8...Nf5 9.Bc3=) 9.Bd3 (9.Qb2 f6=) 9...Bd3 10.Qd3 Nd7 (10...d5 11.Nf3=) 11.Nf3 Ne5 12.Be5 (12.Qe2 c5 13.Bc3 Qc7=) 12...de5 13.Qd8 Rfd8 14.Nbd2 a5 15.Rb1 (15.b5 cb5 16.cb5 Rac8=) 15...ab4=+ 16.ab4 Ra2 17.Ke2 (17.c5!?=+) 17...e4–/+ 18.Nd4 Nf5! 19.Rhd1? (19.Nf5 Rdd2) 19...Nd4–+ 20.ed4 Rd4 21.Ke1 (21.b5 Bg5 22.bc6 Rdd2 (22...Bd2?! 23.cb7 Bf4 24.Ke1 Rd1 25.Rd1=+) 23.Rd2 Rd2 (23...Bd2?! 24.cb7 Bf4 25.Ke1=) 24.Ke1 bc6–+) 21...g6 22.c5 Ra4 23.b5 Bc5 24.bc6 bc6 25.Nb3 Rd1 26.Rd1 Bb4 27.Kf1 c5 28.Rc1 f5 29.Nc5 Bc5 30.Rc5–/+ Ra2 31.Rc7 Ra1 32.Ke2 Rh1 33.h3 Rh2 34.Kf1= Rh1 35.Ke2 Ra1 36.g3 Ra6 37.h4 Rf6 38.Ke3 Rf7 39.Rc3 Kg7 40.f3 ef3 41.Kf3 Kh6 42.Kf4 Kh5 43.Rc5 Re7 44.Kf3 Re4 45.Rb5 Ra4 46.Rc5 h6 47.Rb5 Ra3 48.Kg2 g5 49.hg5 Kg5 50.Rb4 Re3 51.Ra4 Re4 52.Ra8 ½–½. Neubert,Fritz – Fritsch,Wolfgang, corr DDR–ch M805, 1986.

4.c4 Nf6 5.Nc3 Be7 6.e3 0-0 7.Nf3 a5 8.Be2 Bf5 (8...e4 9.Nd4+=) 9.0-0= h6 (9...ab4 10.ab4 Ra1 11.Qa1=) 10.d4 Qc7 11.Re1 (11.b5 Nbd7=) 11...Nbd7 (11...e4 12.Nd2=) 12.b5 Rfe8 13.Rc1 Bg6 (13...Rac8 14.Nh4 Bh7 15.Qa4=) 14.Nd2 (14.Nh4 Bh7=) 14...Bf8 (14...Rac8 15.Bf3=) 15.a4 Rac8 16.Bf3 ed4 17.ed4 Re1 18.Qe1 Re8 19.Qd1 (19.Qf1 c5=) 19...Be7 (19...Qb6 20.Qb3 Qd4 A) 21.bc6?? Qd2 22.Ne4 Be4 (worse is 22...Ne4 23.cd7 Qf2 24.Kh1–+; worse is 22...Re4 23.Be4 Nc5 24.Rd1 Nb3 25.Rd2 bc6 26.Rd3 Ne4 27.Rb3–+) 23.cd7 Nd7–+; B) 21.Nce4=) 20.Ne2 Bd8 21.Bc3 d5 (21...Bd3 22.Ng3+=) 22.bc6 (22.c5 cb5 23.ab5 b6+=) 22...bc6 (worse is 22...Qc6 23.Nf4+/–) 23.g3 (23.Nb3 Qa7+=) 23...Qd6= 24.Nf4 Be4 25.Ne4 Ne4 26.cd5 cd5 27.Rc2 ½–½. Simmelink,Joop (2240) – Teverovski,Bogoljub (2015), FICGS, 2016.

4.c4 Nf6 5.d4 e4 6.Nc3=.

4.c4 Nf6 5.d4 e4 6.d5=.

4.d3 g6 (4...Nf6 5.e4+=) 5.e4= Bg7 6.Nf3 (6.Nd2 Ne7=) 6...Be6 (6...f5 7.Nc3=) 7.c4 (7.d4 ed4 8.Nd4 Nf6+=) 7...a5 (7...f5 8.Be2=) 8.Be2 (8.d4 Nf6 9.Bd3 ed4 10.Nd4 ab4 11.ab4 Ra1 12.Ba1 Na6=) 8...Nh6 (8...ab4 9.ab4 Ra1 10.Ba1=) 9.0-0 (9.d4 ed4 10.Bd4 Bd4 11.Qd4 0-0+=) 9...0-0 (9...f5 10.Nbd2=) 10.Nbd2 (10.d4 f5 11.Nbd2 fe4 12.Ne4 Bf5=) 10...f5 (10...Qb6 11.Qb3=) 11.d4 Nd7 (11...fe4 12.Ne4 Bf5 13.Ng3=) 12.ef5 (12.Re1 Qf6+=) 12...Bf5 (12...Nf5 13.de5 Ne5 14.Qc2=) 13.de5 de5 (13...Ne5 14.Bd4=) 14.Nb3 (14.Re1 Nf7+=) 14...a4 (14...b6=) 15.Nc5 (better is 15.Na5!? Qc8 16.c5+= (worse is 16.Qa4 b6+=)) 15...Nc5+= 16.bc5 Re8 17.Qd8 (17.Bc3 Qe7+=) 17...Rad8 (worse is 17...Red8 18.Be5 (18.Ne5? Rd2 19.Bc3 Re2–+) 18...Be5 19.Ne5+=) 18.Nh4?? (better is 18.Bd1+=) 18...Rd2–+ 19.Nf5 Nf5 (19...Rb2?! 20.Nd6 Rd8 21.Bf3+=; 19...Re2?! 20.Ng7 Kg7 21.Rab1=) 20.Bd1 Rb2 21.Ba4 e4 22.Rab1 (22.g4 Nh4 23.Rab1 Rf8 24.Rb2 Bb2–+) 22...Rb1 (22...e3 23.fe3 Ne3 24.Rb2 Bb2 25.Rb1–+) 23.Rb1 Re7 24.Bd1 (24.Bb3 Bd4–+) 24...Bd4 Black plans e3 25.a4 (25.Be2 Bc5 26.a4 b6–+) 25...e3 26.fe3 Bc5 0–1. Sapareva,Magdalena – Kostov,Nikolay, 184th MGU Sofia, 2017.

4.e3 Nf6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 c6).

4.e4 Be7 5.Nf3 (5.d4 ed4 6.Bd4 Nf6=) 5...Nf6 6.d4 ed4 (6...Ne4 7.de5 d5 8.Bd3=) 7.Qd4 0-0 (7...Be6 8.Ng5=) 8.Bd3 c5 9.bc5 (9.Qc3 d5=) 9...Nc6 10.Qa4 (10.Qc3 dc5 11.0-0 Re8=) 10...dc5 11.e5 Nd5 (11...Qe8 12.Qf4=) 12.0-0 Be6 (12...Nd4 13.Nd4 Nb6 14.Qa5 cd4 15.Rd1+=) 13.Qe4+= g6 14.Nc3 (14.Rd1 Qe8+=) 14...Nc3 (14...Qd7 15.Nd5 Bd5 16.Qf4=) 15.Bc3+= Bf5 (15...Qd5 16.Qf4+=) 16.Qf4 Bd3 17.Rfd1 (< 17.cd3 Qd3 18.Rac1 Rfd8=+) 17...Bc2 18.Rd8 Rad8 19.Rc1 Bf5 20.Qh6 Be6 (20...Rd3 21.Ng5 Bg5 22.Qg5=) 21.Ng5= Bg5 22.Qg5 Rd3 (22...Rd5 23.Qf6=) 23.h3 (23.f3 Rfd8=) 23...b5 24.Bb2 c4 25.Qf6 Re8 26.Rc3 Nd4 27.Kh2 Rd1 28.Bc1 a5=+ 29.Bg5 h5 30.Rc1 Rd3 31.Rb1 Rb8 32.Bh6 Nf5=+ 33.Bg5 h4 34.Bc1 Rd1 35.Qg5 c3 36.Qf4 c2 37.Rb2 Nd4 (38.Qe3 Rc8–+) 0–1. Baer,Werner – Blankenburg,Bruno, TT–15 ETC, 2005.

4.e4 Nf6 5.Nc3 Be7 6.d4 ed4 7.Qd4 0-0 8.Nf3 Bg4 9.Be2 Nbd7 10.h3 Bh5 11.0-0 Re8 12.Rfe1 Qb6 13.g4 (13.Rad1 Qd4 14.Rd4 b5=) 13...Bg6= 14.g5 Nh5 15.Bc1 f6 16.h4 Ne5 17.Qb6 Nf3 18.Bf3 ab6 19.Bg4 fg5 20.hg5 Rf8 21.Be6 Kh8 22.Bf5 (22.a4 Nf4 23.Bf5 Bg5 24.Bg6 hg6=) 22...Bf5= 23.ef5 Rae8 24.b5 Rf5 25.bc6 (25.Rb1!? Rf3 26.Na4=) 25...bc6–/+ 26.Rb1 Kg8 (better is 26...b5–/+) 27.Rb6+= Rc5 28.Na2 (28.Rb3 Kf7 29.f4 Rf5=) 28...Kf8 29.g6 hg6 30.Nb4 Rc8 31.Re6 Rc4 32.Rb7 (< 32.Rg6 c5 33.Nd5 Rc2=+) 32...Re8 33.Be3 Nf6 34.Ba7 g5 35.a4 (35.Be3 d5 36.Rc6 Rc6 37.Nc6 Ba3 38.Bg5 Ne4=) 35...Kf7 36.Re3 Ng4 37.Re2 Ne5 38.a5 Kg6 39.Bb8 Rg4 40.Kf1 Rh8 41.Re3 Bf6 42.a6 (42.Bd6?! Nc4 43.Rd3 Na5=) 42...Rh1 43.Ke2 Rgg1 44.Nd3 Nd3 45.Rd3 Re1= 46.Kd2 Ra1 47.Bd6?? Ra6 48.Ra3 Ra3 49.Ba3 Bd4 50.Rc7 Bf2 51.Ke2 Bd4 52.Rc6 Kf5 53.Bc5 Rh2 54.Kd3 Be5 55.Bg1 Rg2 56.Be3=+ Bf4 57.Rc8?? Rg3–+ 58.Re8 Rh3 59.Ke2 Rh2 60.Kd3 Kg4 61.Bd4 Rd2 62.Kc3 g6 63.Re1 Kf5 64.Rf1 Rh2 65.Bc5 Rh3 66.Kd4 g4 67.c4 Rf3 68.Rd1 Be3 69.Kd5 Bc5 70.Kc5 g3 71.Rg1 Kf4 (72.Kd4 Rf2–/+) 0–1. Taulien,Hans_Juergen (2225) – Landwigg,Steve (1800), remoteschach.de, 2005.

4.e4 Nf6 5.d3 Be7 6.Nf3 0-0 7.Be2 a5 8.0-0 ab4 9.ab4 Ra1 10.Ba1 Qb6 11.Bc3 Na6 12.Qd2 Re8 13.Na3 (13.Re1 h6+=) 13...d5 Can b4 get defended? 14.ed5 cd5 (worse is 14...Nd5 A) worse is 15.Ne5 Bb4 (15...Nab4?! 16.Bb2=; worse is 15...Ndb4 16.Nf7 Nd5 17.Nc4+=) 16.Bb4 Qb4 (16...Nab4?! 17.d4=; 16...Ndb4?! 17.d4=; 16...Re5?! 17.Bd6 Re6 18.Nc4=) 17.Qb4 Nab4–+ (17...Ndb4?! 18.d4=); B) 15.Nc4 Qd8 B1) 16.Nce5? f6–+ (16...Ndb4?! 17.d4=; 16...Bb4 17.Bb4 Ndb4 18.d4=; 16...Nab4?! 17.Bb2+=; 16...Nc3?! 17.Qc3 f6 18.b5+=); B2) worse is 16.Nfe5 f6–/+; B3) 16.Rb1+=; 14...Bb4?! 15.Bb4 Qb4 16.Qb4 Nb4 17.dc6 bc6 18.Rb1=; 14...Nb4? 15.d6 (15.Be5?! Nbd5 16.Nc4 Qd8=) 15...Bd6 16.Nc4+-) 15.d4 (15.Ne5 d4 16.Bb2 Bb4 17.Qf4 Ba3 18.Ba3–+) 15...Ne4 16.Qe3 Nc3 17.Qc3 e4 18.Ne5 Nc7 (better is 18...f6 19.Ng4 Qb4 20.Qb4 Nb4–/+) 19.f4?? (better is 19.Rb1–/+) 19...ef3–+ (19...Bb4?! 20.Qb2 Bc5 21.Qb6 Bb6 22.c3–+; 19...Qb4?! 20.Qc7 Qa3 21.Bb5–/+) 20.Rf3 (20.Nac4 dc4 21.Bc4 Bb4 22.Qe3–+) 20...Bb4 21.Qd3 (21.Qe3 Ba3 22.Rf7 Bc1–+) 21...Re5 22.Nb1 (22.Rf2 Re4 23.c4 Ba3 24.Qa3 Qd4–+) 22...Bg4 23.Rf2 Re2 24.Re2 Be2 25.Qe2 Qd4 26.Kh1 Ne6 0–1. Ramos,Francis – Teverovski,Bogoljub (2015), FICGS, 2016.

4.e4 Nf6 5.d3 Be7 6.Nf3 0-0 7.Be2 a5 8.0-0 ab4 9.ab4 Ra1 10.Ba1 Qb6 11.Bc3 Na6 12.Qd2 Re8 13.Na3 (13.Re1 h6+=) 13...d5 Can b4 get defended? 14.ed5 cd5 (worse is 14...Nd5 A) worse is 15.Ne5 Bb4 (15...Nab4?! 16.Bb2=; worse is 15...Ndb4 16.Nf7 Nd5 17.Nc4+=) 16.Bb4 Qb4 (16...Nab4?! 17.d4=; 16...Ndb4?! 17.d4=; 16...Re5?! 17.Bd6 Re6 18.Nc4=) 17.Qb4 Nab4–+ (17...Ndb4?! 18.d4=); B) 15.Nc4 Qd8 B1) 16.Nce5? f6–+ (16...Ndb4?! 17.d4=; 16...Bb4 17.Bb4 Ndb4 18.d4=; 16...Nab4?! 17.Bb2+=; 16...Nc3?! 17.Qc3 f6 18.b5+=); B2) worse is 16.Nfe5 f6–/+; B3) 16.Rb1+=; 14...Bb4?! 15.Bb4 Qb4 16.Qb4 Nb4 17.dc6 bc6 18.Rb1=; 14...Nb4? 15.d6 (15.Be5?! Nbd5 16.Nc4 Qd8=) 15...Bd6 16.Nc4+-) 15.d4 (15.Ne5 d4 16.Bb2 Bb4 17.Qf4 Ba3 18.Ba3–+) 15...Ne4 16.Qe3 Nc3 17.Qc3 e4 18.Ne5 Nc7 (better is 18...f6 19.Ng4 Qb4 20.Qb4 Nb4–/+) 19.f4?? (better is 19.Rb1–/+) 19...ef3–+ (19...Bb4?! 20.Qb2 Bc5 21.Qb6 Bb6 22.c3–+; 19...Qb4?! 20.Qc7 Qa3 21.Bb5–/+) 20.Rf3 (20.Nac4 dc4 21.Bc4 Bb4 22.Qe3–+) 20...Bb4 21.Qd3 (21.Qe3 Ba3 22.Rf7 Bc1–+) 21...Re5 22.Nb1 (22.Rf2 Re4 23.c4 Ba3 24.Qa3 Qd4–+) 22...Bg4 23.Rf2 Re2 24.Re2 Be2 25.Qe2 Qd4 26.Kh1 Ne6 0–1. Ramos,Francis – Teverovski,Bogoljub (2015), FICGS, 2016.

4.g3 Nf6 5.Bg2 (--> 1.b4 e5 2.Bb2 d6 3.g3 Nf6 4.Bg2 c6 5.a3).

4.h3 f5 5.Nf3 (5.e3 Be6=) 5...Nf6 6.e3 Be7 7.c4 (7.Be2 0-0=) 7...0-0=+ 8.Nc3 (8.Be2 e4 9.Nd4 c5=+) 8...Qe8 (8...a5 9.Qa4=+) 9.Be2 (9.d4 e4 10.Ng5 h6–+) 9...Be6 (9...Qg6 10.Rh2=) 10.d4 (10.0-0 Qg6=) 10...e4 11.Nd2 Nbd7 (11...Qg6 12.0-0=+) 12.0-0 Kh8 (12...Qg6 13.Qc2=) 13.f3 (13.Qb3 d5=) 13...ef3 (13...Qg6 14.Qc2=) 14.Bf3 (14.Rf3 Qg6=) 14...Rc8 (better is 14...Nb6 15.Qe2 Qg6=) 15.Nb3 (better is 15.d5 cd5 16.Nd5 Nd5 17.cd5= (< 17.Bd5 Bd5 18.cd5 Bf6–/+)) 15...Nb6 (better is 15...Bc4 16.Be2 Be2 17.Qe2 Qg6–/+) 16.d5= (16...cd5 17.cd5=). kiloracer (2175) – rbeckett (2215), net–chess.com, 2005.

4.h3 Nf6 5.Nf3 =+.

4.c4 Nf6 5.Nf3 Qe7 6.c5 Bc7 7.e3 0-0 8.Bc4 (8.d4 e4 9.Nfd2 d6=) 8...d5 9.Bb3 (9.cd6 Bd6 10.d3 b5=+) 9...Bg4 (9...b6 10.Qc2–/+) 10.h3=+ Bf3 (10...Bh5 11.d3=+) 11.gf3 (11.Qf3 e4 12.Qf5 Nbd7=+) 11...Nbd7 12.d3 g6 (12...a5 13.Nc3–/+) 13.e4 (13.Nc3 a5=+) 13...de4 (13...a5 14.Nc3 d4 15.Na2=+) 14.fe4= Rad8 (14...a5 15.Nc3=) 15.Qf3 Kg7 16.Nc3 Nh5 (16...b6 17.cb6 Bb6 18.Rg1=) 17.0-0-0 (better is 17.Rg1 Ndf6 18.Ne2+=) 17...Nf4?? (17...a5=) 18.d4?? (better is 18.Qf4! ef4 19.Nd5 Qf6 20.Bf6 Nf6 21.Nc7+-) 18...ed4–/+ 19.Rd4 Be5 20.Rd2=+ Ne6 21.Ne2? Bb2 22.Rb2 Ne5 23.Qc3 f6 24.f4? Nd3–+ (25.Kb1 Nb2 26.Kb2 a5–+) 0–1. lapinagile – gregorgysi (2235), net–chess.com, 2009.

4.d4 Qe7 (4...e4 5.c4=) 5.e4 (5.c4 Bc7=) 5...Nf6 6.Qd3 (6.Nf3 ed4 7.Qd4 Bc7=) 6...Bc7 (6...ed4 7.Nd2=+) 7.de5 (7.Qg3 d5 (< 7...Ne4 8.Qg7 Rf8 9.de5+=) 8.de5 Nh5=) 7...Be5=+ 8.Be5 Qe5 9.Nc3 +=. marus – SOK, internet, 2001.

4.e3 Bc7 5.c4 d5 6.d4 ed4 (6...e4 7.cd5 cd5 8.Nc3=) 7.Bd4 (worse 7.ed4 Nf6=+) 7...Nf6 8.Nf3 (8.cd5 0-0=) 8...0-0= 9.Nbd2 Bf5 10.Nb3 Re8 11.Bd3 Bg4 12.Qc2 Nbd7 13.Bf6 (13.cd5 Bf3 14.gf3 cd5=) 13...Nf6 14.0-0-0 (better 14.Nbd4!?=) 14...Qe7 15.cd5 cd5 16.h3 (16.Qc5 Bd6 17.Qd4-/+) 16...Bh5 (16...Bf3!? 17.gf3 a5-+) 17.g4=+ Bg6 18.Bg6 hg6 19.Nc5 (19.g5 Ne4 20.Rd5 Rac8-/+) 19...Rac8 20.Qb3 (20.g5 b6 21.gf6 Qf6-/+) 20...b6 21.g5? (21.Nd3 Ne4 22.Kb1 Bd6-+) 21...Ne4 (21...bc5 22.gf6 Qf6 23.Nh2 Bh2 24.Rh2 cb4 25.Kd2-+) 22.Ne4 (22.Nd3 Be5 23.Kb1 Nc3 24.Kc2 Bd6-+ (worse 24...Nd1 25.Kd1 Rc3 26.Qb1-+)) 22...de4 (22...Qe4!? 23.Nd4 Be5 24.Kb2-+) 23.Nd4-/+ a5 (23...Bg3 24.Kd2 Bf2 25.h4-/+) 24.Kb1 (24.Kd2!?-/+) 24...ab4-+ 25.ab4 Bd6 26.Nc2 Rc6 (26...Be5 27.h4 Rc3 28.Qa4-+) 27.Rd2 (27.Nd4 Rc7 28.Nb5 Rd7-/+) 27...Rec8 28.Rhd1 Be5 29.Nd4 (29.h4 Rc3 30.Qa4 Kh7-+) 29...Bd4 (29...Rc3 30.Qa4 R3c4-+ (worse 30...Qg5 31.Nb5-+)) 30.Rd3?? (better 30.Rd4 Qg5 31.Qd5-/+) 30...ed3 31.Rd3 Rc1 32.Ka2 Ra1 0-1. danishguy (2045) - rabathayelfath (2050), Rated Bullet game, lichess.org, 2020.

4.Nf3 Qe7=.

4.Nf3+= Nf6 5.Ne5 b5 6.d4 (6.e3 Be5 7.Be5 d6+/–) 6...0-0 7.e3 Be7 8.Bd3 Qe8 (better is 8...a5+=) 9.Qf3 (9.0-0 a5+/–) 9...Bb7?? (better is 9...d6 10.Nc6 Qc6 11.Qc6 Nc6 12.Bb5 Nd8=+) 10.Qh3 (10.Bb5 Qc8 11.Bd3 c5+/–) 10...h5 (10...d5 11.0-0+/–) 11.0-0 d5 12.g4 (12.Bc3 Bc8 13.Qf3 a5 14.ba5 Na6+/–) 12...g6? (better is 12...Bc8!?+=) 13.gh5+/– Nh5 14.Nd2 Bc8 15.Qf3 Nd7? (better is 15...a5+/–) 16.Nc6+- Ndf6 17.Ne7 Qe7 18.Bb5 Qc7 19.c3 Ng4 20.Qg2 Ngf6 21.Be2 Ng7 22.c4 Nf5 23.cd5 Qc2 24.Bc1 Bb7 25.Bc4 Rae8 26.Ra2 Qc3 27.Bb2 (27...Qd2 28.Ba1 Ne3 29.Rd2 Ng2 30.Kg2 Bd5 31.Bd5 Nd5 32.Rc1+-; better is 27.Qf3+-) 1–0. Seimi Agus Eion – athar, ChessWorld.net, 2005.

4.c4 d5 5.Nc3 Nf6 6.d3 Bf5 7.e3 Na6 8.cd5 Nd5 (8...ed3 9.Bd3 Bd3 10.Qd3+/–) 9.Ne4 Nac7 (9...c5 10.Qh5 g6 11.Qf3+/–) 10.Nf3 Be7? (better is 10...a5!? 11.ba5 Nb5+/–) 11.Bg7+- Rg8 12.Bb2 h5 (12...Be6 13.Rc1+-) 13.Ne5 f6 (13...h4+-) 14.Qh5 (14...Bg6 15.Ng6+-) 1–0. Robert Edward (1850) – CHED, internet, 2006.

4.e3 d5 5.d3 Nf6 6.de4 Ne4 7.Bd3 (7.Nd2 a5=) 7...Nd6 (7...a5!? 8.Nf3 ab4=) 8.Nf3 Bg4 (8...Be7!?+=) 9.Nbd2+/– f6 (9...Nd7 10.h3 Be6 11.Nd4+/–) 10.0-0 (10.h3 Bh5 11.0-0 Nd7+/–) 10...Nd7 11.c4 (11.h3!? Bf3 12.Nf3 Qe7+/–) 11...dc4+/– 12.Nc4 Nc4 13.Bc4 b5? (better is 13...Nb6 14.Bb3 Qd1 15.Rfd1 a5+/–) 14.Bb3 Bf3? (14...Ne5 15.Be5 Qd1 16.Bd1 fe5 17.Ne5 Bd1 18.Rfd1 c5 19.bc5 Bc5+-) 15.Qf3 Qc7 16.Rac1 Rc8 17.Bd5! Nb8 18.Qh5 g6 19.Qf3 Qd7 20.Bf6 Qd5 21.Qd5 cd5 22.Rc8 Kd7 23.Rb8 Rg8 24.Rd1 Kd6 25.Bd4 Ke7 26.Bc5 Kf7 27.Rf8 Rf8 28.Bf8 Kf8 29.Rd5 1–0. Trkn – GARROCK, itsyourturn.com, 2001.

4.e3 d5 5.Be2 Nf6 6.d3 Nbd7 7.Nd2 a5 8.Bc3 ab4 9.ab4 Ra1 10.Qa1 ed3 11.Bd3 Bd6 12.Ngf3 h6 13.0-0 0-0 14.Qb2 Qe7 15.Ra1 Re8 16.Bf5 Nb6 17.Bf6 gf6 18.Bc8 Rc8 19.Qd4 Nd7 20.Ra7 Ne5?? (better is 20...Rb8 21.c3 Ne5+/–) 21.Ne5+- Qe5 (21...Qe6 22.Nd3+-) 22.Qg4 Kh7 23.Qc8 Qh2 24.Kf1 Qh5 25.Ra1 (better is 25.g4 Qg6 26.Rb7+-) 25...Qh1+/– 26.Ke2 Qa1 27.Qb7 Kg7 28.Qc6 Bb4 29.Qd5 Qc3 30.Qd4 Qa3 31.Qg4 Kh7 32.Qh5 Qa6 33.c4 Qe6 34.Qd5 Bd2 (34...Qg4 35.Qf3 Qe6 36.Qe4 Kg7 37.Kd3+-) 35.Kd2 (35.Qd2?! Qg4 36.Kd3 Qg2+/–) 35...Kg7 36.Kc3 Kf8 37.Qe6 fe6 38.Kb4 Ke7 39.Kc5 Kd7 40.Kb6 h5 41.g3 f5 42.c5 Kc8 43.f4 Kb8 44.Kc6 Kc8 45.Kd6 Kd8 46.Ke6 (better is 46.c6!? Kc8+-) 46...Kc7 47.Kf5 Kc6 48.Kg5 Kc5 49.f5 Kd5 50.f6 Ke6 51.Kg6 Ke5 52.f7 Ke4 53.f8Q Ke3 54.Kh5 Kd4 55.Kg5 Kd5 56.Kf5 Kd4 57.Qd8 Ke3 58.Qd5 Kf2 59.Kf4 Kg1 60.Qf3 Kh2 61.Qe2 Kh3 62.g4 Kh4 63.Qh2 1–0. Yannick – Abra, playchess.de, 2005.

4.Nh3 d5 5.Nf4=.

4.Nh3 Nf6 5.e3 d5 6.c4 (6.Nf4!?=+) 6...Bh3–/+ 7.gh3 g6 (7...dc4!? 8.Bc4 b5–/+) 8.cd5=+ cd5 9.Bb5 Nc6 10.Qc2 (10.Qa4 Qd6=+) 10...Qd6 (10...Rc8!?–/+) 11.d3 (11.f3 ef3 12.0-0 Rc8=+) 11...ed3 12.Qd3 Bg7 (12...a6 13.Ba4=+) 13.Nd2 0-0-0 (13...a6!? 14.Ne4 Ne4 15.Bg7 Rg8 16.Bc6 bc6=+) 14.Rc1+= Kb8 (14...Kd7!?+=) 15.Bc6+/– bc6 16.Qa6 Rc8 (16...Qe7+/–) 17.Bd4 (17.b5+/–) 17...Qc7? (17...Qd7 18.b5 Qb7 19.Qb7 Kb7 20.bc6 Rc6 21.Rc6 Kc6 22.Ke2=) 18.Nf3 (18.Rc6 Qe7 19.Rf6 Rc1 20.Ke2 Rh1 21.Qb5 Qb7 22.Qb7 Kb7 23.Rf7 Kb8 24.Ba7 Kc8 25.Rg7 Rh2+-) 18...Nh5 (18...Qb7 19.Be5 Ka8 20.Qb7 Kb7 21.Ng5+=) 19.Bg7+/– Ng7 20.Nd4 Qb7 (20...Qb6 21.Nc6 Ka8 22.Qa4+/–) 21.Nc6 Ka8 22.Ke2?? Qa6–+ (23.Kd1 Rc6 24.Rc6 Qc6–+) 0–1. kiloracer (2225) – sportsmaniac (2095), net–chess.com, 2006.

4.ba5 A) 4...d5 5.Nf3 (5.Bb2 e4 6.Ne2 Nf6 7.Nf4 Bd6 8.Be2 0-0 9.0-0) 5...Nf6 6.Ne5 Bd6 7.Bb2 0-0 8.Bd3 Re8 9.f4; B) 4...Nf6 5.Nf3 (5.Bb2 e4 6.Ne2 d5 7.Nd4 c5 8.Nb5 Be7 9.c4) 5...e4 6.Nd4 c5 7.Nb3 Nc6 8.Bb5 Be7 9.Nc3.

4.Bb2 A) 4...Nf6 5.Be5 (5.ba5 d6 6.Nc3 Qa5 7.Nf3 Nbd7 8.h4 Nc5 9.Be2; 5.b5 cb5 6.Bb5 Nc6 7.c4 Bc5 8.Nc3 0-0 9.Nf3) 5...ab4 6.ab4 Ra1 7.Ba1 Bb4 8.Bc3 Be7 9.Nf3; B) 4...ab4 5.ab4 Ra1 6.Ba1 e4 7.Qg4 Nf6 8.Bf6 Qf6 9.Qe4; C) 4...e4 5.d3 (5.b5 Nf6 6.d3 cb5 7.de4 Ne4 8.Nd2 d5 9.Bb5; 5.Ne2 Nf6 6.ba5 d5 7.c4 dc4 8.Nf4 Bd6 9.Bc4) 5...d5 6.de4 de4 7.Qd8 Kd8 8.b5 cb5 9.Bb5; D) 4...d5 5.Be5 (5.ba5 Nd7 6.Nf3 Ngf6 7.Ne5 Bd6 8.Nd7 Bd7 9.Bd4; 5.b5 Nd7 6.Nf3 Bd6 7.Nc3 Ngf6 8.Be2 0-0 9.0-0) 5...Nd7 6.Bb2 ab4 7.Nf3 Ngf6 8.Be2 Nb6 9.ab4.

4.b5 d5 5.Bb2 (5.Nf3 e4 6.Nd4 c5 7.Ne2 Nf6 8.Nbc3 Nbd7 9.d3; 5.Nc3 Nf6 6.Nf3 Bd6 7.d3 0-0 8.Rb1 d4 9.Ne4) 5...Nd7 6.Nf3 Bd6 7.Nc3 Ngf6 8.Be2 0-0 9.0-0.

4.Bb2 a5 5.Be5 ab4 6.Nf3 d5 7.ab4 Ra1 8.Ba1 Bb4 9.c4.

4.Bb2 c5 5.b5 Qe7 6.c4 a6 7.Nc3 ab5 8.Nb5 d6 9.Nf3.

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 c6).

4.Bb2 e4 5.Nc3 (5.Ne2 a5 6.Nbc3 ab4 7.ab4 Ra1 8.Qa1 Bb4 9.Qa4; 5.d3 d5 6.de4 de4 7.Qd8 Kd8 8.Nd2 a5 9.b5) 5...d5 6.Nge2 a5 7.Nd4 ab4 8.ab4 Ra1 9.Qa1.

3.b5 Nf6?? 4.bc6+- bc6 5.Bb2 d6 (5...e4 6.e3+-) 6.Nf3 (6.Nc3 Rb8 7.Rb1 d5+-) 6...Rb8 7.Bc3 Be7 (7...e4 8.Nd4 Bd7 9.e3+-) 8.e3 (8.d3 Bg4+-) 8...Bg4 (8...Qd7 9.d3+-) 9.Be2 Bh5 (9...e4 10.Nd4 Bd7 11.0-0+-) 10.0-0 Bg6 (10...Qc8 11.d3+-) 11.d3 h6 12.Nbd2 Nd7 13.Rb1 0-0 14.Rb8 Qb8 15.Qb1 Qb1 16.Rb1 c5 (16...Nb6 17.g3+-) 17.h3 (17.Rb7!? Rc8+-) 17...Ra8 (17...Nb6 18.Nc4+-) 18.Rb7 Bd8 19.Nb3 (19.e4 Nb6 20.Nb3 f5+-) 19...f6 (19...c4 20.Nc1 cd3 21.cd3 Nc5+-) 20.Na5 Be8 21.Nc6 a5 (21...Nb6 22.Nd8 Rd8 23.Ba5+- (23.Rc7?! Nd5 24.Ba5 Nc7 25.Bc7 Rd7+/-)) 22.Nd8 Rd8 23.Rc7 Ra8 (23...Nf8 24.Nd2+-) 24.d4 (24.Nh4 Kf8+-) 24...e4 (24...cd4 25.ed4 Nb6 26.Bd2+-) 25.Bc4 Kh7 (25...Kf8 26.Bd5 Rb8 27.Be4+-) 26.Nd2 f5 (26...cd4 27.Bd4 Ne5 28.Bd5+-) 27.dc5 Nc5 (27...dc5 28.Be6 Rd8 29.Bf5 Kg8 30.Ne4 Kf8+-) 28.Bd5 (28.Rg7 Kh8 29.Rd7) 28...Rb8 29.Ba5 (29.Rg7 Kh8 30.Rb7) 29...Rb2 (29...Na6 30.Re7 Rb5 31.Bc3 Rd5 32.Rg7 Kh8 33.Re7 Kg8 34.Re8 Kf7 35.Ra8+-) 30.Bb3 (better 30.Bc3 Rb7 31.Bb7 Nb7 32.Rg7 Kh8 33.Rb7 Kg8+-) 30...Bb5 (30...h5+-) 31.Bc3 Nb3 32.cb3 (better 32.Rg7 Kh8 33.Bb2 Nd2 34.Rb7 Kg8 35.Rb5 d5+-) 32...Ra2 (32...Rc2 33.Rg7 Kh8 34.Rc7 Kg8 35.g4+-) 33.a4 (better 33.Rg7 Kh8 34.Rb7 Kg8 35.Rb5 Ra3 36.Rf5 h5+-) 33...Bd3 34.Bg7 (34.Rg7 Kh8+-) 34...Kg6 (34...Kg8 35.Bc3+-) 35.Bc3 Kh5 (35...h5 36.Rg7 Kh6 37.Rd7+-) 36.a5 (36.Rg7 Rd2 37.Bd2 Be2 38.a5 d5 39.Be1 d4 40.a6 d3 41.a7 d2 42.Bd2 Bd1 43.a8Q Bb3 44.Qe8 Bf7 45.Qf7 Kh4 46.Qf5 h5 47.Qe4) 36...d5 (36...Rc2 37.Kh2 d5 38.Kg3+-) 37.Rc5 (37.Nf1 Bf1 38.Kf1 d4 39.ed4 Ra3+-) 37...d4 (37...Rc2 38.Kh2 Kg6 39.Kg3+-) 38.ed4 Kg6 39.Nc4 f4 (39...Bc4 40.Rc4 f4 41.d5+-) 40.Ne5 Kh7 41.Rc7 Kg8 42.Ng6 (better 42.d5 Rc2 43.d6 Bb5+-) 42...e3 43.Nf4 (better 43.Ne7 Kf8 44.fe3+-) 43...ef2-+ 44.Kh2 f1Q 45.Nd3 (45.Rc8 Kf7 46.Rc7 Ke8 47.Rc8 Kd7 48.Rf8-+) 45…Qg2 (45...Rg2?!=) 0-1. GM_HUSARZ (1970) - Baluk (2070), Rated Bullet game, lichess.org, 2015.

3.Nc3 a6 4.Bb2 Nf6 5.g3 d6 6.Bg2 Bd7 7.Bc6 Bc6 8.Nf3 Be7 9.d3 h6 10.e4 g5 11.Ne2 Nh7 12.Nd2 Bd7 13.c4 f5 14.Bc3 f4 15.Qb3 Rf8 16.0-0-0 Be6 (16...fg3 17.Ng3 Be6 18.d4 ed4 19.Bd4=+) 17.Kb2 (17.gf4 gf4 18.d4 f3=) 17...b6 (17...fg3!? 18.Ng3 Qd7-/+) 18.d4 fg3 19.fg3 Rf2 20.Rde1 ed4 (better 20...a5!? 21.ba5 ba5 22.Qa4 Qd7 23.Qd7 Kd7 24.de5 de5=+) 21.Nd4+= Bg8 22.Nf5 b5 23.Ne7 (better 23.Qd1!? Bf6 24.Ref1 Bc3 25.Kc3 Qf6 26.Kc2 Rf1 27.Rf1+/-) 23...Qe7= 24.e5 Kd7?? (better 24...0-0-0 25.e6 Nf6 26.cb5 d5=) 25.ed6 Qd6 26.Qc2 Bc4?? (better 26...bc4 27.Kc1 Qd3 28.Qa4 Kc8=) 27.Nc4?? (better 27.Qh7 Kc6 28.Qe4 Qd5 29.Qe3+-) 27...Rc2-+ 28.Kc2 Qg6 (28...bc4?! 29.Rd1 Re8 30.Rd6 cd6 31.Rf1=+) 29.Kb3 (29.Kb2 bc4 30.Rd1 Kc6-+) 29...bc4 30.Kc4 Qf7 31.Kd3 Kc6 32.Kc2 (32.Rhf1 Qa2 33.Re4 Rd8 34.Rd4 Re8 35.Rc4 Kb7-+) 32...Qf5 (better 32...Qa2 33.Kc1 Rf8-+) 33.Kb2 Rd8 34.Re5 (34.Rhf1 Qh3 35.Rf2 Nf8-+) 34...Qf2 35.Kb3 Qf3 (35...Rd3!? 36.Rc1 Nf6 37.Rc2-+) 36.Rhe1 Rd6 (36...Rd3 37.Rc5 Kd7 38.Kc2-+) 37.R5e3 Qf7 38.Kb2 Nf6 39.Re7 Qg6 40.R1e6 Qf5 41.Rd6 cd6 (41...Kd6 42.Rf7 Qf2 43.Kb3 Qh2 44.Rf6 Ke7 45.Ra6 Qg3 46.Rh6-+) 42.Re2 (42.Rf7 Qf2 43.Kb3 Qh2 44.Rf6 Qg3 45.Rh6-+) 42...Nd5 43.Rc2 Nc3 44.Rc3 Kb6 45.Kb3 (45.h4 Qf2 46.Kb3 gh4 47.gh4 Qh4-+) 45...Qf6 (better 45...d5 46.Kb2 d4 47.Rc2-+) 46.a4 (46.Rc2 d5 47.Rd2 Qf3 48.Kc2 Qa3-+) 46...Qe6 47.Ka3 a5 48.ba5 (48.Rd3 ab4 49.Kb4 Qe4 50.Kc3 Kc5-+) 48...Ka5 49.Rb3 (49.g4 Qg4 50.Kb2 Qb4 51.Kc2 Qa4 52.Kb2 Qd4-+) 49...Qd5 (better 49...Qc4 50.h4 g4 51.Rb5 Qb5 52.ab5 Kb5 53.Kb3-+) 50.Rb5 (50.Rc3 Qd1 51.Rc8 Qd3 52.Kb2 Ka4 53.h3-+) 50...Qb5! 51.ab5 Kb5 52.Kb3 d5 (better 52...g4 53.Kc3-+) 53.Kc3 Kc5 54.Kd3 Kd6 (better 54...g4 55.Ke3 d4 56.Ke4-+) 55.Ke3 Ke6 56.Kd3 Ke5 (better 56...g4!? 57.Ke3-+) 57.Ke3 d4 58.Kd3 Kd5 (better 58...g4 59.Kd2-+) 59.Ke2 Ke5 (better 59...g4 60.Kd3-+) 60.Kf3?? (60.Kd3 g4-+) 60...Kd5 61.Kg4?? (61.Ke2 g4 62.Kd3-+) 61…Kc4 0-1. crnobijelii (2025) - TacticoX (2085), Rated Bullet game, lichess.org, 2015.

3.Nc3 Nf6 4.Rb1 (4.e4 d5 5.ed5 Nd5=) 4...d5 5.f3 (5.e3 d4 6.ed4 ed4+=) 5...d4–/+ 6.Ne4 (6.Na4 Be6–/+) 6...Bf5 (6...Ne4 7.fe4 Qh4 8.g3 Qe4 9.Nf3–+) 7.e3? (better is 7.Nf6!? Qf6 8.e4 de3 9.de3–/+) 7...Ne4–+ 8.fe4 Be4 (8...Qh4 9.Ke2 Qe4 10.d3–+) 9.d3–/+ Bd5 10.ed4 (10.Nf3 b5–/+) 10...Nd4 (better is 10...Qh4 11.Kd2 Nd4 12.Ne2–+) 11.c3? (11.Be3 Be7–+) 11...Nb5 (better is 11...Qh4 12.g3 Qe7–+) 12.c4 Nc3 (12...Bc4 13.Qe2 Qh4 14.g3–/+) 13.Qc2 (13.Qb3 Nb1 14.cd5 a5 15.Qb1 ab4–/+) 13...Nb1 (13...Qh4 14.g3 Qd4 15.cd5 Nb1 16.Nf3–+) 14.cd5 Na3 15.Qa4 (15.Ba3 a5–+) 15...c6 (15...b5 16.Qa3 Qh4 17.Kd1 Bb4 18.Nf3 Ba3 19.Nh4 Bc1 20.Kc1–+) 16.Ba3 b5 (16...Qd5 17.Bb2–+) 17.Qa6 (17.Qb3 Qd5 18.Qd5 cd5–+) 17...Qd5 (17...Qb6 18.Qb6 ab6 19.Bb2 Bb4 20.Kd1 cd5 21.Be5–+) 18.Qb7 (better is 18.Be2 e4 19.de4 Qe4 20.Kf1–/+) 18...Qd8?? (better is 18...Rd8–+) 19.Qc6+/– Ke7 20.Qb5 a6? 21.Qe5+- Kd7 22.Nf3?? Bd6?? 23.Qf5 Ke7 24.Qg5 Kf8+/– 25.Bb2 Bb4 26.Nd2?? Qg5–+ 27.Bc1 Re8 28.Be2 Re3 29.Kd1–+ Qg2 30.Re1 h5 31.Nf1 Be1 32.Be3 Bb4 33.d4 g6 34.Bd2 a5 35.Ne3 Qh1 36.Nf1 Kg7 37.Bf4 f6 38.Bc7 Rc8 39.Bf4 Qd5 40.Bd3 Qd4 41.Ke2 Qf4 (41...Qf4 42.Be4 Qe4 43.Kf2 Rc2 44.Nd2 Rd2 45.Kg3 Qg4#) 0–1. MikeonChess – Bruce Swan, internet, 2008.

3.d3 a5 4.ba5 (4.b5 Na7=) 4...Ra5 5.Bd2 b6?? (better is 5...Ra7+=) 6.Ba5+/– ba5 7.e4 Nd4 (7...Nf6 8.Nf3+/–) 8.Nf3 Nf3 9.Qf3 Bb7 10.Qg3 d5 (better is 10...f6+-) 11.Qe5 Qe7 12.Qe7 Be7 13.Kd1 (13.Nd2!? Nf6+-) 13...Bf6 14.Ra2 de4 15.de4 Be4 16.Bb5 c6 17.Bd3 (better is 17.Re1 cb5 18.Re4 Ne7 19.a4+-) 17...Bd5 18.c4 Bg2 19.Rg1 Bf3 20.Kc1 Ne7 21.Nd2 Bh5 22.Nb3 Be5 23.Na5 Bf4 (23...Bh2!? 24.Re1 Bf3+/–) 24.Kc2+- Bg6 25.h3 Kd7 26.Bg6 hg6 27.Rd1 Kc7 28.Rb2 Bd6?? (28...Kc8 29.Rb6 Rh3 30.Nc6 Nc6 31.Rc6 Kb7+-) 29.Rb7 Kc8 30.Rd6 Rd8 (30...Rh5 31.Re7 Ra5 32.Rf7 Ra3 33.Rc6 Kd8 34.Rg6 Ke8 35.Rgg7 Ra5+-) 31.c5 Nd5 (31...Rh8 32.Re7 Rh5 33.Rc6 Kd8 34.Rd6 Kc8 35.Nb7 Rd5 36.Rd5 Kb8 37.Rd8 Ka7 38.Nd6 Ka6 39.Ra8#) 32.Rc6 Nc7 33.Rcc7# 1–0. Stephan,Patrick (1920) – Wascinski,Alexander von (1985), remoteschach.de, 2005.

3.e3 a5 4.b5= Nce7 5.Bb2 f6 (5...d6 6.d4 ed4 7.Qd4=) 6.Bd3 (6.d4 d6 7.Bd3+=) 6...c6 (better is 6...d5!?=) 7.Be5!+/– fe5 (7...d5!? 8.Bf4 Bf5+/–) 8.Qh5+- Ng6 (8...g6 9.Qe5 Nf6 10.Qf6+-) 9.Bg6 Ke7?? (9...hg6 10.Qh8 Qg5+-) 10.Qe5# 1–0. Wall,Bill – Gengus, internet, 2004.

3.e3 a6 4.Bb2 d6 5.c4 Nf6 6.Nc3 e4 (6...Be7 7.Nf3=) 7.Qc2 Bf5 8.Nge2 Bg6 (8...a5 9.Ng3 ab4 10.Nf5 bc3 11.Bc3+/–) 9.Ng3 Qe7 10.b5 (10.Nd5 Nd5 11.cd5 Nb8+/–) 10...Nd8 (10...ab5 11.cb5 Na5 12.Rc1=) 11.a4 (11.Nd5 Nd5 12.cd5 a5+/–) 11...a5 (11...ab5 12.ab5 Ra1 13.Ba1=) 12.Nce2 (12.Nd5 Nd5 13.cd5 h5+/–) 12...h6 (better is 12...Ne6!?=) 13.Nf4+/– Bh7 14.Be2 (14.Rb1 Ne6 15.Bf6 Qf6 16.Ne4 0-0-0+/–) 14...b6 (14...Ne6!?+=) 15.0-0+/– c6 (15...Ne6 16.Bf6 Qf6 17.Ne4+/–) 16.Rfd1 (better is 16.Bf6 gf6 17.Rab1+-) 16...c5?? (better is 16...Nd7+/–) 17.Bf6+- gf6 18.Nd5 Qb7 19.Nf6 Ke7 20.Nd5 (20.Nfe4?! Bg7 21.Rac1 Rg8+-) 20...Kd7 21.Ne4 (21.Qc3 f6 22.Bg4 Ke8 23.Nf6 Kf7 24.Nfe4 Rg8+-) 21...Bg7 (21...Kc8 22.Bf3 Ne6 23.Qc3 Be4 24.Qh8 Bf3 25.gf3+-) 22.Ra2 (better is 22.Nef6!? Kc8 23.Nh7 Ba1 24.Ra1 Ra7+-) 22...Bg6 23.Bd3 Rf8 24.Ndf6 (24.f4 f5 25.Ng3 Bf7+-) 24...Bf6?? (better is 24...Ke6 25.f4 Bf6 26.f5 Bf5+-) 25.Nf6+- Kc8 26.Nd5 (26.Bg6 fg6 27.Qg6 Qf7 28.Qf7 Rf7+-) 26...Rb8 (26...f5 27.Be2+-) 27.Bf5 (27.Bg6 fg6 28.d4 Qg7+-) 27...Ne6 (27...Bf5 28.Qf5 Ne6 29.d4+-) 28.Qd3 (28.Be6 fe6 29.Qg6 ed5 30.Qd6 Rd8 31.Qh6 dc4 32.Qe6 Qd7 33.Qc4 Kb7+-) 28...Kd8 (28...Rg8 29.Qe4 Bf5 30.Qf5+-) 29.Bg6 fg6 30.Qg6 Qf7 31.Qf7 Rf7 32.f4 Kd7 33.Rf1 h5 34.Rf3 Ng7 (34...Nc7 35.Nc7 Kc7 36.e4+-) 35.Rh3 Kc8 36.d3 Kb7 37.Rf2 Rh8 38.e4 White plans f5 38...Rhf8 (38...Ne6 39.f5 Nd4 40.Nf4+-) 39.f5 Rh8 (39...Rg8 40.f6 Ne6 41.Rh5+-) 40.Nf4 (40.g4 Ne8 41.g5 Nc7+-) 40...h4 (40...Rf6 41.g4! Rg8 42.Rg2+-) 41.Ng6 Rg8 42.Rh4 Ne8 43.g4 Rfg7 (43...Nf6 44.g5 Nd7 45.Rg4+-) 44.h3 Nc7 1–0. Schoeler,Klaus – Jacobsen,Waldfried, Bayern–ch Seniors, 2000.

3.e3 Nf6 4.Bb2 Ne4 5.Nf3 (5.b5 Ne7+=) 5...d6= 6.Bb5 a6 (6...Bd7 7.0-0=) 7.Ba4 b5 8.Bb3 Nf6 9.Nc3 Bg4 10.h3 Be6 11.Rc1 d5 Black intends e4 12.0-0 (12.Ng5 Be7=) 12...e4+= 13.Ne1 (13.Ng5 a5+=) 13...a5 14.Nb5 ab4 15.ab4 Nb4 16.c4 Nd3? (better is 16...dc4 17.Bc4 c6 18.Bf6 gf6+=) 17.Nd3+- ed3?! (17...c6 18.cd5 Nd5 19.Rc6 ed3+-) 18.cd5 Bd5 (18...c6 19.de6 fe6 20.Bf6 gf6 21.Qh5 Kd7 22.Nd4+-) 19.Bf6 (19.Nc7 Ke7 20.Bf6 Kf6 21.Bd5 Ra5 22.Rc6 Bd6 23.Qf3 Kg6 24.Bf7 Kh6 25.Qf4 Qg5 26.Rd6 g6+-) 19...gf6 (19...Qf6 20.Bd5 Rb8+-) 20.Bd5 (better is 20.Nc7 Qc7 21.Rc7 Kd8 22.Bd5 Kc7 23.Ba8 Bd6+-) 20...Ra5 (20...Bd6 21.Qh5 0-0 22.Be4+-) 21.Nc7 Ke7 (21...Ke7 22.Qh5 Rd5 23.Nd5 Kd6+-). thedesertfox (2055) – rvdc (1760), net–chess.com, 2004. (=1.a3 e5 2.b4 Nc6)

3.e4 a5 4.b5= Nd4 5.Nf3 (5.c3 Ne6=) 5...Bc5 (5...d5 6.Nd4 ed4 7.Qe2+=) 6.c3 (better is 6.Nd4 Bd4 7.c3=) 6...Ne6 (better is 6...Nf3!? 7.Qf3 Nf6=) 7.Ne5+/– Qf6 (7...Qh4 8.Qe2+/–) 8.Nf3 (8.d4 Be7+-) 8...Nf4 (8...Qg6!? 9.d3 d6+/–) 9.d4+- Bb6 (9...Bb6 10.Qd2 Ng6+-; 9...Be7 10.g3 Ng6 11.Bc4+-) 1–0. hpillsbury – jacoben (1625), net–chess.com, 2007.

3.Nf3 a5 4.b5 Nd4 5.Ne5 Qe7 6.Nd3 Nb5 7.a4 Nd4 8.Bb2 Nf5 9.Nc3 b6 10.Nd5+/– Qd6 11.e4+- Nfe7?? 12.Be5 Qe6 13.Nc7 Kd8 14.Ne6 de6 15.Qf3 f6 16.Bd4 f5 17.Ne5 g5 18.Bb6 Ke8 19.Bb5 Nc6 20.Qh5 Ke7 21.Qf7 Kd6 22.Qc7#1–0. mrkt – Knightlord, zagraj.pl, 2006.

3.Nf3 e4 4.Ng5?? (4.b5 ef3 5.bc6 dc6 6.gf3 Nf6=+) 4...Nf6 (Better is 4...Qg5 5.d4 Qf6–+) 5.c3 d5 6.d3 h6 7.Nh3 Bf5 8.d4 Bd6 9.e3 0-0 10.Bb5 Ng4 11.Qe2 Nh2 12.Bc6 bc6 13.Nd2 a5 14.Bb2 Qb8 15.Rc1 Qb5 16.Qb5 cb5 17.Nf4 Bf4 18.ef4 Ng4 19.f3 Ne3?? 20.fe4 de4 21.g3 Rfe8 22.c4?? c6 23.Rc3? Ng4 24.cb5 e3?? 25.Rc6?? ed2–+ 26.Kd2 Be4 27.Rf1? Bc6 28.bc6 ab4 29.ab4 Ne3 30.Rc1 Nd5 31.b5? Rec8 32.Kd3? Rab8–+ 33.Rc5 Nc7 34.Kc4 f6 35.d5= Rd8 36.g4 Kf7 37.Bc1 g6 38.Bd2? Ke7 39.Ba5 Kd6 40.b6 Rbc8 41.Bc3?? Re8 42.g5 fg5?? 43.Be5+= Re5 44.fe5 Ke5 45.Ra5 Kd6 46.Kd4? Nd5–+ 47.b7 Rb8 48.Ra8?? Kc7 49.Kd5+- g4 50.Rb8 Kb8 51.Kd6 g3 52.Kd7 g2 53.c7 Kb7 54.c8Q Ka7 55.Qc1 g5 56.Qg1 Ka6 1–0. Kunk – Hammi.Bogart, ChessWorld.net, 2003.

3.Bb2 (--> 1.b4 e5 2.Bb2 Nc6 3.a3??).

3.Bb2 a6 (--> 1.b4 a6 2.Bb2 Nc6 3.a3 e5).

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

3.Bb2 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 Nc6).

3.Bb2 f6 4.e3 d5 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Nc6).

3.Bb2 Qf6 4.Nf3 (--> 1.b4 e5 2.Bb2 Qf6 3.Nf3 Nc6 4.a3).

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

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

4.e4 Bc5 5.Nf3 d6 (5...Nf6 6.Nc3=) 6.d3 (6.d4 ed4 7.Qd2 Bb6=) 6...Nf6 7.Bd2 (better is 7.Be2=) 7...Nc6?? (better is 7...c6+=) 8.bc6+- bc6 9.Bg5 (9.c3 Qe7+-) 9...Bg4 (9...h6 10.Bh4+-) 10.Be2 (10.h3 Bd7+-) 10...h6 11.Bf6 (11.Bh4 0-0+-) 11...Qf6 12.h3 (12.Nbd2 0-0+-) 12...Bf3 13.gf3 (13.Bf3 0-0+-) 13...Qh4 (13...Rb8 14.Nc3+/–) 14.Rh2 Rb8 15.c4 (15.Nd2 0-0+/–) 15...Rb6 (better is 15...Bd4 16.Ra2 Qg5+/–) 16.Qa4?? (16.Nd2 0-0+/–) 16...Kd7?? (better is 16...Bd4 17.c5 dc5 18.Qa7 Ba1 19.Qa8 Qd8 20.Qd8 Kd8–+) 17.Qa7?? (better is 17.Nd2+/–) 17...Rhb8 (better is 17...Rb1 18.Rb1 Ba7–+) 18.Nd2 Rb1! 19.Nb1 (19.Rb1 Ba7 Discovered attack; 19.Nb1 Ba7 Discovered attack) 19...Ba7 20.Kf1?? (20.Nd2 Be3 21.Rg2 Bd2 22.Kd2 Rb2 23.Ke1 Qh3–+) 20...Rg8 (better is 20...Bd4 21.Nc3 Bc3 22.Rd1–+) 21.Nd2 (21.Ra2 Qf4 22.Rh1 Rb8–+) 21...g5 (21...Qf4 22.Rg2 Qd2 23.Rd1–+) 22.a4?? (22.Ke1 Bd4 23.Rb1 Bc3–+) 22...h5 Black prepares the advance g4 23.Ke1 g4! 24.fg4 hg4 25.Bg4? Ke7?? 26.Rh1?? d5 27.Rh2?? de4 28.Ne4 f5?? 29.Bf5?? Rg1–+ 30.Ke2 Ra1 31.Nd2 Qf4 32.Rg2 Qf5 33.Rh2 Ra3 34.Kd1 Bf2 35.Ke2 Bg3 36.Rg2 Qd3 (36...Qd3 37.Kd1 Ra1#) 0–1. yeatond – dwitman, net–chess.com, 2005.

4.e4 c6 5.d4 d6 6.de5 de5 7.Qd8 Kd8 8.Bd2 b6 9.Nc3 cb5 10.Nb5 Nf6 11.Rd1 Bd7 12.Nf3 Bc5 13.Ne5 Ke7 14.Nd7 Nd7 15.Nc7 Rac8 16.Nd5 Kd8 17.Ba5 ba5 18.Bb5 f5?? 19.Nf4 Rc7 20.Ne6 1–0. Klaus Behrmann – Geordiedazza, ChessWorld.net, 2003.

4.e4 Nf6=.

4.Nf3 e4=+ 5.Nd4 d5 (5...c5 6.bc6 dc6 7.e3=+) 6.Nc3 (6.d3 Nf6=+) 6...c5 (6...Nf6 7.e3=+) 7.bc6 Nc6 8.Ncb5 (8.Nc6 bc6 9.Rb1 Nf6–/+) 8...Nd4 (8...a6 9.Nc6 bc6 10.Nc3–/+) 9.Nd4+= Bg4 (9...Nf6 10.e3+=) 10.f3 (10.Rb1 Bc5 11.h3 Bd7=) 10...Bd7 11.Rb1 Qc7 12.fe4 (12.e3 a6=) 12...de4 (12...Bd6 13.e5 (13.ed5?? Bg3 14.hg3 Qg3#) 13...Be5 14.e3 Bh2 15.Bd3–/+) 13.Rb3 (13.e3 a6 14.c3 Nf6=) 13...Bc5 (13...Nf6 14.e3+=) 14.Rc3 (better is 14.e3!?+=) 14...Qd6–/+ 15.Nb3 Ba3 (better is 15...Bb6 16.e3 Nf6–/+) 16.Ba3+= Qa3 17.Nc5 Qb4 (17...Qa5!? 18.Ne4 Qb4+=) 18.Nd7+/– Kd7 19.Rb3 (better is 19.e3 Ke8 20.Qg4+/–) 19...Qd4? (better is 19...Qa5+=) 20.Rb7+- Ke6?? (better is 20...Kc8 21.Rf7 Nh6+-) 21.e3 Qd5 (21...Qe5 22.Bc4 Kd6+-) 22.Rb5 (22.Qg4 f5 23.Qg7 Qb7 24.Qb7 Ne7+-) 22...Qc6 (22...Nf6 23.Rd5 Kd5 24.Qa1+-) 23.Qg4 Ke7 24.Qg7 Qf6 (24...Rc8 25.Qh8 Qc2 26.Re5 Kd7 27.Rd5 Ke7+-) 25.Rb7 Kd6 26.Qg3 Kd5 27.Rd7 (27.Bc4! Kc4 28.Qc7 Kd5 29.c4 Ke6 30.Qd7 Ke5 31.Rb5#) 27...Ke6+- 28.Rd6 (28.Rd6 Ke7 29.Rf6 Nf6 30.Qe5 Kf8 31.Qf6+-) 1–0. Fritz 11 – NN, 2009. (=1.a3 e5 2.b4 Nc6 3.b5 Na5)

4.Bb2 d6 5.e3 f5 6.Nf3 Nf6 7.d4 e4 8.Nfd2 d5 9.c4 a6 10.Nc3 ab5 11.cd5 c6 12.dc6 bc6 13.a4 b4 14.Ncb1 Be6 15.Nb3 Nbd7 16.N1d2 Nb6 Attacking the isolated pawn on a4 (16...Bd6!?=) 17.a5+= Nc4?? (better 17...Nbd7+=) 18.Nc4 Nd5 19.Ne5 Be7 (19...Bd6 20.Nc6 Qf6 21.Qd2+-) 20.Nc6 Qd6 21.Ne7 Ke7 (21...Ne7 22.Bb5 Kf7 23.Nc5+-) 22.Nc5 White plans a6 22...Rhc8 23.a6 (23.Qb3 Bf7+-) 23...Bf7 24.Be2 Kf6 (24...Kf8 25.g4 f4 26.Qd2+-) 25.0-0 g5 (25...Ra7 26.Qd2 Ke7 27.f3+-) 26.Bc4 h5 Black prepares g4 (26...Ra7 27.Qb3 Kg7 28.f3 ef3 29.Rf3+-) 27.Bd5 (27.Qb3 Ke7+-) 27...Qd5 (27...Bd5 A) 28.Qh5?! Rh8 29.Nb7 Qb8 (29...Rh5?? 30.Nd6 Rah8 31.h3+-) 30.Qh8 Qh8+/-; B) 28.Ra4+-) 28.a7 (28.Qa4 Kg7+-) 28...g4 (28...Rc7 29.Ra6 Kg7 30.Qa4+-) 29.g3 (29.Qa4!? Kg7 30.Qb4 Kg8+-) 29...h4 (29...Ke7 30.Qd2 b3 31.Qb4+-) 30.Ra6 (30.Qa4 Rc7 31.Qb4 Kg7+-) 30...Kg7 31.Qa4 Rh8 (31...hg3 32.fg3 b3 33.Ra5+-) 32.Qc6 Qd8 (32...Qc6 33.d5 Kh7 34.dc6 Rhc8+-) 33.Ne6 Be6 34.Qe6 Qg5 35.d5 Kh7 36.Qf7 Qg7 37.Qg7 1-0. black_bishop_88 (2465) - Geck0 (2475), lichess.org, 2020. (=1.a3 Nc6 2.b4 e5)

4.e3 d6 5.Bb2 f5 6.Nf3 Nf6 7.d4 e4 8.Nfd2 Be7 9.c4 0-0 10.Nc3 Be6 11.a4 Nbd7 12.Be2 Qe8 13.0-0 g5 (13...d5!?=) 14.a5 a6 15.ba6 Ra6 16.Nb5 Bd8 17.d5 Bf7 18.Nd4 Nc5 (18...f4!?+=) 19.Nf5+/- Bg6 20.Nh6 Kg7 21.Ng4 h5 (21...Kg8 22.Nf6 Bf6 23.Bf6 Rf6 24.Nb3+-) 22.Nf6+- Bf6 23.Bf6 Rf6 24.Bh5?? (better 24.Nb3+-) 24...Bh5-+ 25.Qh5?? (better 25.Qc2-+) 25…Qh5 0-1. black_bishop_88 (2510) - gmman88 (2480), lichess.org, 2020. (=1.a3 Nc6 2.b4 e5)

4.e3 d6 5.Bb2 Nf6 6.d4 e4 7.d5 g6 (7...Be7 8.Nc3=) 8.c4 (8.Nd2 Bf5+=) 8...Bg7= 9.Nc3 0-0 10.Nge2 h5 (10...Nbd7 11.Nd4=) 11.Nd4+= Re8 12.h3 (12.Be2 h4+=) 12...Nbd7 13.Be2 Ne5 14.0-0 h4 15.Rc1 Bf5 16.Nf5 gf5 17.a4 Nh7 (17...Nfd7 18.Rb1+=) 18.Ba3 (18.Ra1 Ng5+/-) 18...Qg5 19.Kh1 Bh6 (19...Ng6 20.c5+/-) 20.c5 Kh8 21.cd6 cd6 (21...Rg8!? 22.Rg1 Bf8+-) 22.Bd6+- Ng6 23.Bh2 Rg8 24.Qd4 (24.d6 Nf6+-) 24...Bg7 25.Qb4 Be5 26.d6 Bh2 27.Kh2 Nf4 28.Rg1 Ng2? (28...Ne6+-) 29.Qd4 (29.Bf1 Qf6 30.Rg2 Rgd8+-) 29...f6 30.Nd5 Rg7 (30...Rad8 31.Qa7 b6 32.Qb6 Rb8+-) 31.Nf4! Rag8?? (31...Nf4 32.Rg5 Pinning (32.Rg5 Deflection)) 32.Rg2 Qg2 33.Ng2 Rg2 34.Kh1 Rf2 35.Bf1 Rf3 (35...Rd8 36.d7 Kg7 37.Rc8+-) 36.d7 Rd8 (36...Rfg3 37.Rc8 Rg1 38.Kh2+-) 37.Rc8 (37.Rc8 Rf1 38.Kg2+-) 1-0. black_bishop_88 (2560) - gmman88 (2450), lichess.org, 2020. (=1.a3 Nc6 2.b4 e5)

4.e3 f5 5.Bb2 d6 6.Nf3 Nf6 7.d4 (7.Bc4 d5 8.Be2 e4=) 7...e4 8.Nfd2 g6 9.c4 Bg7 10.f3 (10.Be2 a6=) 10...0-0 11.Be2 ef3 12.Bf3 Re8 13.0-0 White prepares the advance d5 13...Re3 14.d5 (14.Nc3 Nbd7=+) 14...Nbd7 15.Nc3 Nc5 16.Ne2 Nd3 17.Bd4 Re8 18.Nb3 (18.Qc2 Ne5=+) 18...Ne5-/+ 19.Nf4 Ne4 20.Be4 fe4 21.Ne6? White prepares c5 (better 21.Qc2!?-/+) 21...Be6-+ 22.de6 Qe7 (22...Re6 23.Be3 Qe7 24.Qe2-+) 23.c5 (23.Re1-+) 23...Qe6 24.cd6 cd6 (24...Qd6 25.Qc2-+) 25.Rc1 Qg4 (25...Re7!? 26.Rc2-+) 26.Qg4-/+ Ng4 27.Bg7 Kg7 28.Rc7 Kh6 29.Rff7 e3 30.h4 (30.Rh7 Kg5 31.h4 Kf5-/+) 30...Rh8-+ 31.Nd4 Rae8 (31...b6 32.Rfe7-+) 32.Ne2 (32.Kf1 Ne5 33.Rf6 Ref8 34.Rf8 Rf8 35.Ke2 Rf7 36.Rf7 Nf7 37.Ke3 Kh5-+) 32...Ne5 33.Rf4 Nd3 (better 33...Rc8 34.Rb7 Rc2-/+) 34.Rd4= Nf2 35.g4 Re4?? (better 35...Ng4 36.Rg4 Rhf8+=) 36.g5+- Kh5 37.Ng3 Kh4 38.Ne4 (38.Re4?! Ne4 39.Ne4 e2=+) 38...Ne4 39.Re4 Kg5 40.Re3 (40.Rb7 h5+-) 40...h5 (40...a6 41.b6+-) 41.Rd3 h4 (41...Rb8 42.Rd6 a6 43.b6+-) 42.Rd6 h3 (42...Rb8 43.Rg7 Kf5 44.Rdg6+-) 43.Rg7 (43.Rb7 Kf5+-) 43...h2 (43...Kf4 44.Rf7 Ke5 45.Rg6+-) 44.Kh1 Kf4 45.Rgg6 Re8 (45...Rh3 46.Rd7 Kf5 47.Rgd6 Ra3 48.Rb7+-) 46.Rg2 (46.Rdf6 Ke4+-) 46...Re1 47.Kh2 Ra1 48.Rd4 Ke5 (48...Kf5 49.Rf2 Ke5 50.Rd8+-) 49.Ra4 a6 50.ba6 ba6 51.Ra6 Kd5 52.Ra5 Kc4 53.Ra4 Kb3 54.Rgg4 (54.Rf4!? Re1+-) 54...Ra2 55.Kg3 Ra1 56.Rgb4 Kc3 57.Kf4 Rf1 58.Ke5 Re1 59.Kd5 Rd1 60.Kc5 Rc1 (60...Rd8 61.Ra6+-) 61.Kb5 (61.Rc4 Kd2 62.Rc1 Kc1 63.Rc4 Kd1 64.a4 Ke1 65.a5 Kf1 66.a6 Kg1 67.a7 Kg2 68.a8Q Kf2 69.Rf4 Ke2 70.Qg2 Ke3 71.Rf3 Ke4 72.Qe2) 61...Kd3 62.Rc4 Rb1 63.Rab4 Ra1 64.Rd4 Kc3 (64...Ke3 65.a4 Rg1+-) 65.Rbc4 Kb3 66.Rb4 Ka3?? (66...Kc3 67.a4 Re1 68.Rbc4 Kb3 69.Rd3 Kb2+-) 67.Rdc4 (67.Rd8 Rd1 68.Ra8) 67...Rb1 68.Rb1 Ka2 69.Rbb4 Ka3 70.Rc3 (70.Rc8 Ka2 71.Ra8) 70...Ka2 71.Rd3 Ka1 72.Ra3 1-0. black_bishop_88 (2500) - gmman88 (2510), lichess.org, 2020. (=1.a3 Nc6 2.b4 e5)

4.e3 Nf6 5.Bb2 d6 6.Be2=+.

4.a4 b6 5.Bb2= Bb7 (5...d6!?=) 6.e3+- Ne6 7.Be5 Ne7 8.Nf3 Bf3 (8...Ng6 9.Bc3+-) 9.Qf3 d6 (9...a6 10.Be2+-) 10.Bb2+- a6 11.ba6 h6?? (better 11...c6+-) 12.Bb5 c6 13.Bc6 (13.Bc6 Nc6 14.Qc6 Ke7 15.Nc3+-) 1–0. fuzzy1bear – eddy, gameknot.com, 2019.

4.Bb2 Nb5 5.e3 c6 (5...a6 6.c4 Na7 7.Be5=) 6.a4 (6.Bb5 Qb6 7.Be5 Qb5=) 6...Nd6 (6...Nc7 7.Be5 d6 8.Bb2=) 7.Be5 f6 (7...Ne4 8.Nf3=) 8.Bb2 (8.Bf4 Ne4=) 8...Nh6 (8...Ne4 9.d3 Qb6 10.Ra2 Qa5 11.c3=) 9.c4 (9.Nf3 Ne4 10.Be2 d5=) 9...Ne4 (9...b6 10.Nf3=) 10.Nc3 Ng5 (10...Nc3 11.Bc3 Be7 12.Qh5 Nf7 13.Rb1=) 11.d4 (11.Nf3 Nf3 12.Qf3 Bb4+=) 11...Bb4= 12.Bd3 0-0 (12...d5 13.Qb3 a5 14.cd5 Qd5 15.Qd5 cd5 16.Nge2+=) 13.Qc2+= g6 (13...d5 14.cd5 Qd5 15.f4+=) 14.Bg6! f5 (14...hg6 15.Qg6 Double attack) 15.Bh5 Qa5 (15...f4 16.e4+/–) 16.Nge2 Bd6 (16...Ng4!?+/–) 17.c5 Be7 18.0-0 d6 (18...b6 19.Rab1+-) 19.cd6 Bd6 20.Ba3 c5 (better is 20...Ba3 21.Ra3 Ne6+-) 21.Nb5 Be7 22.Bc5 Bc5 23.Qc5 1–0. Wall,Bill – Rickh, internet, 1999.

4.Bb2 d6 5.e3 Ne6 6.Nf3=.

4.Bb2= Bd6 5.Nf3 Nf3 6.ef3=.

4.c4 Nf6 5.e3 Nf5 6.g3 (6.d4 ed4 7.ed4 a6+=) 6...d5+= 7.Bb2 dc4 8.Be5 Ng4 (8...Be6 9.Nf3+=) 9.Qg4 Ne3?? (9...Qd5 10.Nf3 Ne3+-) 10.Qe4+- Nf1 (10...Qd5 11.Qe3 Qh1 12.Bg7 Be6 13.Bh8 Qg1+-) 11.Bg7 (11.Kf1?! Be6 12.Nc3 Qd3 13.Qd3 cd3 14.Bc7 Rc8+-) 11...Be6 12.Bh8 Ng3 (12...Be7 13.f3+-) 13.hg3 Bc5 (13...Qd7 14.Bf6 Be7 15.Qe5+-) 14.Qh7 Qe7 15.Qg8 Qf8 (15...Kd7 16.Qa8 Bd5 17.Ne2 Bh1 18.Nbc3+-) 16.Qf8 Kf8 (16...Bf8 17.Nc3+-) 17.Nf3 (better is 17.Bf6 Ke8 18.Rh8 Bf8 19.Nf3+-) 17...Rd8 (17...Ke7+-) 18.Bf6 Rd6 19.Rh8 1–0. sylthibault – readbob, gameknot.com, 2010. (=1.a3 e5 2.b4 Nc6 3.b5 Nd4)

4.e3 Nf5 5.Bb2 d6 6.Bd3 Nf6=+ 7.Ne2 Be7 (7...e4 8.Bc4 d5 9.Bb3=+) 8.Ng3 (8.e4 Nh4 9.0-0 d5=) 8...Ng3=+ 9.hg3 h5 10.Nc3 Bg4 11.Be2 Be6 (11...Be2 12.Ne2 Qd7 13.c4=+) 12.Bf3 (12.e4 d5 13.ed5 Bd5=) 12...d5=+ 13.d3 (13.Bh5? g6-+ (13...Nh5?! 14.Rh5 Rh5 15.Qh5=)) 13...Qd7 14.a4 (14.Bh5? Bg4 (14...Nh5?! 15.Rh5 0-0-0 16.Qe2-/+; 14...Rh5?! 15.Rh5 Nh5 16.Qh5=) 15.Ne2 Bd6-+ (15...Nh5?! 16.f3-+)) 14...a6 15.Ba3 Ba3 16.Ra3 ab5 17.Nb5 c6 18.Nc3 Qe7 19.Rb3? (better 19.Ra1=+) 19...d4-+ 20.Ne4 (20.ed4 Bb3 21.cb3 Qb4-+) 20...Ne4 (20...Ra4 21.Rb7 Nd7 22.ed4 (worse 22.Bh5 g6-/+) 22...ed4 23.Rh5 (23.Bh5? g6-+) 23...Rh5 24.Bh5=; 20...Bb3?! 21.cb3 de3 22.fe3 Qb4 23.Kf2-+) 21.Be4 Bb3 22.cb3 Qb4 23.Ke2 de3 24.fe3 0-0-0 25.Qc2 Rd6 (25...g6 26.Rc1 Rd6 27.Bf3-+) 26.Qc4 (26.Rh4 Qa5-/+) 26...Qc4 27.bc4 g6 28.g4 Kc7 (28...h4 29.c5 Rdd8 30.g5-+) 29.g5 (29.c5 Rdd8 30.gh5 Rh5 31.Rh5 gh5-+) 29...f5 (better 29...Ra8!? 30.Ra1-+) 30.gf6 Rf6 31.c5 Ra8 32.Ra1 g5 33.d4 ed4 34.ed4 g4 35.Kd3 g3 (35...h4 36.Rh1 Rh8 37.Rg1-+) 36.a5 h4 37.d5 (37.Ke3-+) 37...cd5 38.Bd5 Rd8 39.Ke4 Rf2 40.Rb1 Re2?? (better 40...Rd5 41.Kd5 Rg2-+) 41.Kf3-/+ Rf2 42.Ke4 Rd5! 43.Kd5 Rg2 44.a6 (44.Re1-+) 44...Rd2 (worse 44...ba6 45.Ke4-+) 45.Kc4 (45.Ke4 ba6 46.Kf3-+) 45...ba6 46.Rb6 (46.Kc3 Rf2 47.Kd4 g2-+) 46...Rc2 (better 46...g2 47.Rg6 h3-+) 47.Kb3 Rf2 48.Ra6 (48.Rg6 g2 49.Rg7 Kc6-+) 48...g2 49.Ra7 Kc6 50.Ra6 Kc5 51.Ra5 Kb6 52.Ra4 (52.Rg5 h3 53.Rg6 Kc5 54.Rg5 Kd4 55.Rg4 Ke3 56.Rg8-+) 52...g1Q 53.Rb4 Kc5 54.Rc4 Kd5 55.Rc3 (55.Rc2 Qb1 56.Rb2 Rb2 57.Kc3 Qc2) 55...Qb1 56.Ka4 Ra2 57.Ra3 Ra3 (57...Kc4 58.Ra2 Qa2) 58.Ka3 Qb2! (58...Qb2 59.Kb2 h3 60.Kc2 h2 61.Kb3 h1Q 62.Kc3 Qf3 63.Kd2 Kc4 64.Ke1 Qg2 65.Kd1 Kd3 66.Ke1 Qe2) 0-1. black_bishop_88 (2515) - Operator29 (2710), lichess.org, 2020. (=1.a3 Nc6 2.b4 e5)

4.e3 Nf5 5.Bb2 f6 6.g4 Nd6 7.Nc3 a6 8.d4 ab5 9.de5 fe5 10.Nf3 (< 10.Bb5 Nb5 11.Nb5 d6–/+) 10...Nf7 11.Bb5 c6 12.Be2 b5 13.a4 b4 14.Nb1 Ba6 (better is 14...d6!?=+) 15.Ba6+/– Ra6 16.Ne5 Ne5 17.Be5 Qg5 (17...d5 18.Nd2+=) 18.Bf4 Qc5 19.0-0 (better is 19.Qd3 Ra5 20.Bc7+/–) 19...Bd6?? (better is 19...d5+=) 20.Bd6 Nf6 (20...Qa5+-) 21.Bc5 Ne4 22.Bb4 c5 23.Qd5 Rd6 24.Qe4 Kd8 25.Ba5 (25...Rb6 26.Bb6 Kc8 27.Qa8) 1–0. Crafty 20.14 w32 – NN, 2007.

4.e3 Nf5 5.d4 ed4 6.ed4 d5 +=.

4.e3 Nf5 5.d4 f6 6.de5+/– fe5 7.e4 Nd6 8.Qh5 Nf7 9.Bc4 Qf6 (9...Qe7 10.Nc3+/–) 10.Bf7 (10.Nc3!? Qg6 11.Qg6 hg6 12.Nf3+/–) 10...Qf7+/– 11.Qe5 Kd8? (better is 11...Be7 12.Qc7 d5+=) 12.Nf3+- d6 (12...Nf6 13.0-0 Qe6 14.Qb2+-) 13.Ng5 (better is 13.Qd4+-) 13...Nh6?? (better is 13...Qe8 14.Qd4 h6+-) 14.Nf7 Nf7 15.Qd5 Ne5 (15...Ke8 16.0-0+-) 16.Bf4 c6 (16...Ng6 17.Bg5 Ke8 18.Nc3+-) 17.bc6 bc6 18.Qa5 Kd7 19.Be5 de5 20.Qe5 Bd6 21.Qg7 (21.Qg7 Ke6 22.Qh8+-) 1–0. marus1 – holyoly, internet, 2001.

4.e3 Nf5 5.e4 Nd6 6.Nc3 Nf6 7.Bd3 Be7 (7...a6 8.ba6 ba6 9.Nf3=) 8.Qe2 (8.f4 Nfe4 9.Ne4 Ne4 10.Be4 d5+/–) 8...0-0 9.Nd5 (better is 9.Nf3+=) 9...Nd5+= 10.ed5 Bf6 11.Qh5?? (better is 11.Be4+=) 11...e4–+ 12.Be2 (12.Rb1 ed3 13.cd3 Re8 14.Ne2 Re5–+) 12...Ba1 13.Bg4 (13.a4 Re8–+) 13...f5 (13...Re8 14.Qh3–+) 14.Bh3 g6 15.Qh6 Bg7 16.Qf4 (16.Qe3 g5 17.g3 Nb5–+) 16...Nc4 (16...g5 17.Qg3–+) 17.a4 (17.Qg3 a6 18.ba6 b5–+) 17...d6 (better is 17...g5!? 18.Qg3 g4 19.d3 ed3 20.cd3–+) 18.d3 ed3 (better is 18...Nb6 19.de4 fe4–+) 19.Qc4 dc2 20.Qc2 Re8 21.Be3 (21.Ne2–+) 21...f4 22.Bc8 Rc8 23.Qb3 (23.Nf3 fe3 24.0-0 Qe7–+) 23...fe3 24.fe3 Bh6 (better is 24...Qh4 25.Ke2 Bh6 26.Nf3 Re3 27.Qe3 Qc4 28.Kf2 Be3 29.Ke3–+) 25.Kf2 (25.Ne2 Re3 26.Qc4–+) 25...Be3 26.Kf1 Qf6 27.Nf3 Qa1 28.Ne1 Rf8 (28...Bd4 29.g4 Re1 30.Kg2 Rh1 31.Kf3 Qf1 32.Ke4 Bc5 33.Qg3 Re8 34.Qe5 Re5#) 29.Ke2 Rce8 30.Rf1 Bc1 31.Kd3 Re3 (31...Re3 32.Kc4 Re4 33.Kd3 Rd4 34.Ke2 Rd2 35.Ke3 Qd4#) 0–1. xCalvin – ahmed sharkawy_1, ChessWorld.net, 2005.

4.Nf3 Nb5 5.Ne5= f6 (5...d6 6.e4 Nd4 7.Nf3=) 6.e4 (6.e3 Na3 7.Ba3 Ba3 8.Qh5 Ke7 9.Qf7 (9.Na3?! fe5 10.Bc4 c6+/–; 9.Ra3?! fe5 10.Qe5 Kf8+/–) 9...Kd6 10.Nc4 Kc6 11.Nba3+-) 6...fe5 (6...Na3 7.Na3 fe5 8.Qh5 Ke7 9.Qe5 Kf7 10.Bc4 d5 11.Bd5 Kg6 12.Qg3 Kh6 13.d4 g5 14.h4 Bb4 15.c3 Bc3 16.Qc3+-) 7.Bb5 (better is 7.Qh5 Ke7 8.Qe5 Kf7 9.Bc4 d5 10.Bd5 Kg6 11.Bg8 Rg8 12.Qb5+/–) 7...a6?? (better is 7...Nf6=) 8.Qe5 (8.Bb5?! d6+=) 8...Kf7 9.Bc4 d5 10.Bd5 (10.Bb5?! c6 11.Be2 Nf6+=) 10...Kg6 11.Bg8 Rg8 12.Qb5+-) 7...a6?? (better is 7...Nf6=) 8.Qh5+- g6 (8...Ke7 9.Qe5 Kf7 10.Bc4 d5 11.Bd5 Kg6 12.Qg3 Qg5 13.Bf7 Kh6 14.Nc3+-) 9.Qe5 Qe7 10.Qh8 Qe4 11.Be2 Ne7 12.Nc3 (12.f3 Qc2 13.Bb2 d5+-) 12...Qg2 13.Rf1 d6 14.Bb2 Bd7 (14...Bf5 15.Qh7 Bc2 16.f4+-) 15.0-0-0 (15.Qh7 0-0-0+-) 15...0-0-0 (15...h6 16.h4+-) 16.Qd4 (16.Qh7!? d5+-) 16...Nc6 17.Qd5 (17.Qh4 Qh3 18.Qh3 Bh3+-) 17...Qd5 (17...Qh3 18.Qf3+-) 18.Nd5 Be6 19.Nf4 Bf5 20.Bf6 Re8 21.Bf3 (21.Rde1 Ne5+-) 21...Na5 (21...Ne5 22.Bg2 c6+-) 22.Rfe1 Re1 23.Re1 Bh6 (23...Kd7 24.Bc3 Nc4+-) 24.Re8 (24.Re8 Kd7 25.Rd8#) 1–0. lesbian14 – entropy5, Live Game Caissa's Web, 2006.

4.Nf3 Nf3 5.ef3 d5 6.Bb2 =+.

5.Bb2 d6 6.Nf3 Nf6 7.d4 ed4 8.Nd4 Nd4 9.Qd4 Be7 10.Nd2 0-0 11.Bd3 g6 (11...d5 12.0-0=) 12.Ne4+= Qe8?? (better is 12...Kg7+=) 13.Nf6+- Bf6 14.Qf6 black resigned. (14.Qf6 Qe5 15.Be5 de5 16.Qe5+-) 1–0. marekt – angelbearoh, net–chess.com, 2012.

6.c4 a6 7.ba6 ba6 8.d4=.

6.c4 b6 7.Bd3 Bb7 8.Qh5 g6 9.Bg6+/– hg6 10.Qh8 Nh6 11.Qh7 g5 12.Qg6 Nf7 13.f3 Qe7 14.Nc3 0-0-0 15.Nd5 Bd5 16.cd5 Nc5 17.a4 Nb3 (18.Ra2 Nd6+-). nitousche – color1972, ChessWorld.net, 2004.

6.c4 Nc5 7.d4 Ne4 (7...ed4!? 8.ed4 Ne6+=) 8.de5+/– fe5?? (better is 8...Nc5+/–) 9.Qh5+- Ke7 (9...g6 10.Qe5 Qe7 11.Qe7 Be7 12.Bh8+-) 10.Qe5 Kf7 11.Qe4 (11.Qd5!? Ke8 12.Qe4 Qe7+-) 11...Nf6 12.Qc2 Bc5 (12...a6 13.Nf3+-) 13.Nf3 Re8 (13...b6 14.Nbd2+-) 14.Bd3 h6 (14...Kf8 15.0-0 a6 16.Bh7+-) 15.Bg6 Kf8 (15...Kg8 16.Be8 Ne8 17.0-0+-) 16.Be8 Qe8 17.Bf6 gf6 18.Qh7 Qf7 19.Qf7 (better is 19.Qh8!? Ke7 20.Nh4 d6+-) 19...Kf7 20.Nc3 d6 21.Nd5 Bg4 (21...c6 22.bc6 bc6 23.Nf4+-) 22.Nd2 (22.Nc7 Rg8+-) 22...Rc8 (22...c6 23.bc6 bc6 24.Nb4+-) 23.Ne4 Bb6 24.Nef6 (24.Ndf6!? Ba5 25.Kf1 Be6+-) 24...Ba5 25.Kf1 c6 (25...Bf5 26.g4 Bg6 27.Rd1+-) 26.bc6 bc6 27.Ng4 cd5 28.cd5 (28.Nh6 Kg6 29.Ng4 Rc4+-) 28...Kg6 (28...h5 29.h3 hg4 30.hg4+-) 29.e4 Bc3 (29...Rc4 30.Ke2 Re4 31.Ne3+-) 30.Rc1 Kg5 (30...Rb8 31.Ke2 Rb3 32.a4+-) 31.f3 h5 (31...Rb8 32.h4 Kh5 33.Rc3 Rb1 34.Kf2 Rh1 35.e5+-) 32.Ne3 (better is 32.Nf2 Rc5+-) 32...Kf4 (32...Rb8 33.Ke2 Bg7+-) 33.Nd1 Rg8 34.Rc3 h4 35.Kf2 Rh8 36.g3 hg3 37.hg3 Kg5 (37...Ke5 38.Rh8 a6 39.Rh6 Kd4 40.Rc7 a5 41.Nb2 a4 42.Rc4 Ke5 43.Nd3#) 38.Rh8 (38.Rh8 Kf6 39.f4 a6 40.Rc7 Kg6 41.Ne3 a5 42.Nf5 Kf6 43.Rh6#; 38.f4 Kg6 39.Rh8 Kg7 40.Rd8 Kg6 41.Rd6 Kh5 42.Rc7 a5 43.Ne3 a4 44.Rh7#) 1–0. Fournier,Frederic (2090) – Achkar,Monique, Ch Club, 2010.

6.d4 a6 7.de5 (7.ba6 ed4 (7...ba6 8.de5 Rb8 9.Ra2 Bb7 10.Nf3 fe5 11.Be5 Bc5 12.Rb2 Nf6 13.Bc4+/–) 8.ab7 Bb7 9.ed4 Rb8 10.Bc1 Bd6 11.Ne2 Ne7 12.c4 Ng6 13.d5+=) 7...ab5 (7...d6 8.ed6 (8.ef6 Nf6 9.Nf3 ab5 10.Bb5 c6 11.Bd3 Be7 12.0-0 0-0 13.c4+=) 8...Bd6 9.ba6 ba6 10.Bd3 Rb8 11.Qh5 Ke7 12.Bc3 Qe8 13.Qe8+/–; 7...d5 8.Nc3 (8.ba6 ba6 9.Nc3 Rb8 10.Rb1 c6 11.Nf3 Qc7 12.e4 Qa5 13.Qd2+=) 8...c6 9.bc6 bc6 10.Bd3 Rb8 11.Qh5 Kd7 12.Nd1 Qe8 13.Qh4+/–) 8.Bb5 (8.Bd3 Qe7 9.Nc3 fe5 10.Qh5 Qf7 11.Qe5 c6 12.Ne4 Qe7 13.Qh5+=) 8...Ra5 (8...Bc5 9.Bd3 d5 10.Qh5 Kf8 11.Nf3 Qe8 12.Qh4 Be7 13.Qg3+/–) 9.Bd3 fe5 (9...Qe7 10.Nd2 Nc5 11.Qh5 Kd8 12.Ngf3 d5 13.Be2+/–) 10.Qh5 g6 11.Bg6! hg6 (11...Ke7 12.Qh4 Nf6 13.Bc3+-) 12.Qh8 Ne7 13.Nd2 (13.Be5?! Re5 14.Qe5 Bg7=; 13.Bc3+-) 13...c6? (13...Nc6 14.Ngf3 d6 15.Nh4+-) 14.Bc3 (14.Be5?! Re5 15.Nc4 d6 16.Ne5 Qa5 17.Ke2 de5+/–) 14...Qb6 (14...Ra4 15.Be5 (15.Qe5?! Bg7 16.Qg7 Ng7 17.Bg7 Nf5=) 15...d6 16.Bf6+-) 15.Ngf3 (15.Be5?! Re5 16.Nc4 Qd4 17.Qe5 Qc4+/–) 15...Rd5 (15...Ra4 16.Ne5 (16.Qe5?! Bg7 17.Qg7 Ng7 18.Bg7 Nf5+=) 16...Qc5 17.Nd3+-) 16.Ne5 (worse is 16.Be5 d6 17.Bd4 Qa5+-) 16...Re5 (16...d6 17.Ng4 Kd8 18.Nf6+-) 17.Be5 Qc5 (17...d5 18.h4+-) 18.Ne4 Qc2 (18...Qa5 19.Bc3 Qa4 20.Nd6 Kd8 21.0-0+-) 19.Nd6 Kd8 20.Bg7! Ng7 21.Qf8 Kc7 22.Qe7 Qc3 23.Ke2 Ne6 (23...Nf5 24.Ne8 Kb8 25.Qd8 Qc4 26.Kd2 Qd5 27.Ke1+-) 24.Nb5! Kb8 (24...cb5 25.Qb4 Double attack (25.Qb4 Decoy)) 25.Qd6 Ka8 26.Nc3 1–0. pierre – salve, internet, 2011.

6.d4 ed4 7.ed4 A) 7...Qe7 8.Ne2 (8.Qh5 g6 9.Qe2 d5 10.Nc3 Qd6 11.Nf3 Ne7 12.Qd2 Nf5 13.Be2=) 8...d5 9.Bc1 Bd7 10.Nbc3 Qd6 11.a4 Qb4 12.Bd2 Qd6 13.a5=; B) 7...a6 8.ba6 (8.d5 Nf4 9.Ne2 Ng6 10.Nbc3 ab5 11.Nb5 c6 12.Nbc3 Qe7 13.Qd4=) 8...ba6 9.Nc3 Rb8 10.Rb1 Qe7 11.d5 Nf4 12.Nge2 c6 13.g3=; C) 7...d5 8.Bc1 (8.Nh3 Qe7 9.Qe2 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Qb4 13.Nd2=) 8...Ne7 9.Nf3 Nf5 10.Be2 Bd6 11.Nc3 Nf4 12.g3 Ne2 13.Qe2=.

6.d4 ed4 7.Bd4 A) 7...d5 8.Nf3 (8.Bd3 Nd4 9.ed4 Nh6 10.Nc3 Bg4 11.Nge2 Qd6 12.0-0 0-0-0 13.Qd2=) 8...Nd4 9.Nd4 Bd6 10.Bd3 Ne7 11.0-0 c5 12.bc6 bc6 13.Qh5=; B) 7...Nd4 8.Qd4 (8.ed4 Qe7 9.Be2 a6 10.ba6 b6 11.Nf3 Ba6 12.Kd2 Bb7 13.Re1=) 8...Ne7 9.Bd3 d5 10.Nc3 c6 11.Nge2 Qa5 12.0-0 a6 13.bc6=; C) 7...Nh6 8.Nf3 (8.Bd3 Nd4 9.ed4 d5 10.Ne2 Bd6 11.0-0 0-0 12.c4 dc4 13.Bc4=) 8...Nd4 9.Nd4 c5 10.bc6 dc6 11.Bd3 Bg4 12.f3 Bc8 13.0-0=.

4.Bb2 d6 5.e3 Nf6 6.Nf3 Bg4 7.Be2 Qd7 8.h3 Bf3 9.Bf3 (9.gf3 0-0-0=) 9...0-0-0 (9...Qb5!? 10.Ra2 e4-/+) 10.a4 e4 11.Be2 d5 12.Nc3 Ng6 13.0-0 Bd6 (13...d4 14.ed4 Qd4 15.Re1=) 14.d3 (14.a5 Qe7=) 14...Ne5 (14...Qe6 15.b6 Qe5 16.g3 ab6 17.a5 ba5 18.Ra5=+) 15.a5 Qe7 16.b6 cb6 (16...a6 17.Ra4 Nc6 18.Nb1=) 17.ab6+= a6 18.de4 de4 19.Qd4?? (19.Nd5 Qe6 20.c4 Nd5 21.cd5 Qg6+/-) 19...Bb8?? (better 19...Bb4 20.Ba6 ba6 21.Ra6 Rd4 22.Ra8 Kb7 23.Ra7 Kb6 24.Re7 Be7 25.ed4 Nc4-+) 20.Qa4+= Nc6? (better 20...Qd6 21.g3 Qc6 22.Qc6 Nc6 23.Ne4 Ne4 24.Bg4 Rd7 25.Bd7 Kd7 26.Rfd1 Ke6=) 21.Ba6!+- Qd6?? (21...ba6 22.Qc4 Double attack (22.Qc6 Deflection; 22.Qc6 Decoy; 22.Qc6 Overloading)) 22.g3 (better 22.Bb7 Kd7 23.Rfd1+-) 22...ba6 (22...Rd7 23.Rfd1 Qe6 24.Rd7 Qd7+-) 23.Qa6 (23.Ne4?! Ne4 24.Qa6 Kd7+=) 23...Kd7 24.Rfd1 Ke7 (24...Ne5 25.Rd6 Kd6 26.Nb5 Ke7 27.Qa3 Kd7 28.Qc5 Nf3 29.Kg2+-) 25.Rd6 Bd6 (25...Rd6 26.Ba3 Ne5 27.Qb7 Ke6 28.Bd6 Bd6 29.Ne4+-) 26.Qb7 Rd7 (26...Kf8 27.Qc6 Ne8 28.b7+-) 27.Qc6 Rhd8 28.Ne4 Ne4 29.Qe4 Kf8 30.b7 Re7 (30...Bb8 31.Ra8 Rd1 32.Kg2+-) 31.Qc6 f6 32.Ba3 (32.Qd6 Rd6 33.b8Q Kf7 34.Qd6 h5 35.Ra5 Re4 36.Qd5 Re6 37.Qh5 g6 38.Qh7 Kf8 39.Ra8 Re8 40.Ba3) 32...Ba3 33.Ra3 Kf7 34.Ra8 Rd1 35.Kg2 Rb7 36.Qb7 (36.Qe8) 36...Kg6 37.Ra7 Rg1 (37...Rd8 38.Qg7 Kf5 39.Re7 Rd4 40.Qh7 Kg5 41.Rg7) 38.Kg1 h5 (38...Kh5 39.Qg7 f5 40.Rf7 h6 41.Rf5) 39.Qg7 Kf5 40.Ra5 (40.Re7 h4 41.e4) 40...Ke4 (40...Ke6 41.Ra6 Kd5 42.Qd7 Kc5 43.Qc6 Kb4 44.Ra4) 41.Qg6 (41.Qb7) 41...Kf3 42.Qh5 Ke4 43.Qf5 (43.Qd5) 1-0. black_bishop_88 (2555) - PchelkinVK (2700), Ukrainian Bullet League, 2020. (=1.a3 Nc6 2.b4 e5)

4.Bb2 Ng6 5.c4 d6 6.e3 Be7 7.Nf3 Bf6 8.Be2 b6 (8...N8e7 9.Nc3+=) 9.d3 (9.Nc3 Bb7+/–) 9...Bb7 10.Nbd2 Nh6 11.0-0 0-0 12.a4 Nf5 13.g3 Nh6 (13...a6 14.Ne4+=) 14.e4 (14.a5 ba5 15.Ra5 a6 16.ba6 Ba6+/–) 14...Bc8 15.Re1 Ng4 16.Kg2 h5 17.Ng1 (17.a5+=) 17...Nh4? (better is 17...Bg5!?=) 18.gh4+/– Bh4 19.Rf1 (19.Bg4 hg4 20.Ne2 Qf6+-) 19...Qf6 f2 draws heavy fire (19...Qg5 20.Kh1 Nf2 21.Rf2 Bf2 22.Nb1+=) 20.Ndf3 (better is 20.Bg4 Qg6 21.Ne2+-) 20...Bg5?? (better is 20...Bf2 21.Bc1 Ne3 22.Be3 Be3+=) 21.Bc1 (21.h3 Bf4 22.a5 Nh6+-) 21...Bh6 (21...Bf4 22.Nh3 Nh2 23.Bf4 Nf3 24.Bf3 (24.Kf3?? Bh3 25.Kg3 Bf1–+) 24...Bh3 25.Kh3 Qf4 26.a5+- (26.Bh5?! g6+/–)) 22.h3 Bc1 23.Qc1 (23.hg4 Bf4 24.gh5 Qh6=) 23...Nh6 24.Qg5 h4 (24...Qg5 25.Ng5 f6+-) 25.Qf6 gf6 26.Nh4 Kh7 27.Ngf3 Be6 28.Rg1 Rg8 29.Kh2 Bd7 30.Rg8 Rg8 31.Rg1 (31.a5 Kg7+-) 31...Rg1 32.Ng1 (32.Kg1?! Bh3 33.d4 Kg7+-) 32...Kg7 33.Kg3 f5 34.ef5 Bf5 35.Nf5 Nf5 36.Kf3 Nd4 37.Ke4 f5 38.Ke3 Kh6 (38...Ne6 39.Nf3+-) 39.f4 Nc2 40.Kf3 (40.Kd2 Nd4 41.Nf3 Nb3 42.Kc2 Nc5 43.fe5 de5 44.Ne5 Kg5 45.Nf3 Kf4+-) 40...Nd4 (40...Nb4 41.fe5 de5 42.Ke3+-) 41.Kg3 (41.Kf2 ef4 42.Bd1 Ne6+-) 41...Ne6 (41...Kg6 42.Bd1 Ne6 43.Ne2+-) 42.fe5 de5 43.Nf3 Nd4 (43...Nf4 44.Bf1 Ng6+-) 44.Nd4 ed4 (44...f4 45.Kg4 Kg6+-) 45.Kf4 Kg6 46.h4 Kf6 47.h5 1–0. Fournier,Frederic – Hezelot Jacques, FRA Cup (Team) Picardie, 2001.

4.Bb2 Ng6 5.Nf3 e4 6.Nd4 Nf6=.

4.Bb2 Ng6 5.h4 h5 6.Nf3 Nf6 (better 6...e4!? 7.Nd4 a6=+) 7.Ne5+= d6 (7...Ne5!? 8.Be5 d5+=) 8.Ng6+/- fg6 9.e3 Bf5 10.Bd3 Bd3 11.cd3 Qd7 12.Qc2 (12.Nc3 d5+/-) 12...Qb5+= 13.d4 Qf5 (better 13...Rh6+=) 14.Qf5 (better 14.Qc7 Qd7 15.Qd7 Kd7 16.Nc3+/-) 14...gf5=+ 15.Nc3 c6 (15...d5 16.Rh3=+) 16.a4 (16.d5 Be7=) 16...d5 17.a5 Bd6 18.a6 (18.Ba3 Bc7 19.a6 b6=+) 18...b6 (18...b5 19.d3-/+) 19.Rc1 (19.Ba3 Kd7=+) 19...Kd7 20.Ne2 Ne4 (20...Rab8!?-/+) 21.d3 Nf6 22.g3 Rhe8 23.Ng1 Ng4 24.Nf3 (24.Ne2-/+) 24...Ne3?? (better 24...Bg3 25.Ke2 Nf2-+) 25.fe3= Re3 26.Kf2 Rd3 27.Ne5?? (better 27.Rhe1=) 27...Be5-+ 28.de5 c5 (better 28...Rd2 29.Ke3 Rb2-+) 29.Rc2 (29.Rcd1 Rd1 30.Rd1 Ke6-+) 29...d4 30.Re1 Ke6 31.Bc1 Rc8 32.Bf4 Ra3 33.Rd1 Ra6?? (better 33...d3 34.Rcc1 c4-+) 34.Rd4= cd4 35.Rc8 Ra2 (35...b5 36.Rc7=) 36.Kf3+= a5 (36...Kd5!?+=) 37.Rc6 Kd5 38.Rb6 d3? (38...Ra3 39.Ke2 Ra2 40.Kd3 Ra3 41.Kc2 Rc3 42.Kd2 Rc6 43.Rc6 Kc6+-) 39.e6 (39.Rd6 Kc4 40.e6+-) 39...Kc4?? (39...Re2 40.Be3 Rc2+-) 40.e7 Re2 (40...g5 41.Be3 d2+-) 41.Rd6 (better 41.Be3 Re3 42.Ke3+-) 41...Re7= 42.Rc6 Kd5 (42...Kb3 43.Rb6 Kc2 44.Rc6 Kb2 45.Ra6+=) 43.Rd6 (43.Ra6!? Rd7 44.Ra5 Kc4 45.Bd2+/-) 43...Kc4= 44.Ra6 Kb4 (44...Rd7!? 45.Ra5 d2 46.Bd2 Rd2 47.Rf5 Rd3 48.Kf4 Rd4 49.Kg5 Rd6+/-) 45.Rd6 (45.Bd2!? Kb3 46.Ra5+/-) 45…Kc4 ½-½. black_bishop_88 (2540) - haanjihaanji (2370), lichess.org, 2020. (=1.a3 Nc6 2.b4 e5)

4.e3 d4 5.Ne4 Qd5 6.Bd3 (6.d3 f5 7.c4 Qd8=) 6...Bf5 (6...f5!? 7.Ng3 Nf6–/+ (7...Qg2? 8.e4+-)) 7.f3= 0-0-0 8.Ng5 (better is 8.Ne2=) 8...Bd3–/+ 9.cd3 h6 (9...de3 10.de3 h6–/+ (10...Qd3?? 11.Qd3 Rd3 12.Nf7+-)) 10.e4–/+ Qb5?? (better is 10...Qd7 11.N5h3 Kb8+=) 11.Nf7+- Rh7 12.Nd8 Nd8 13.Ne2 (13.Qb3!? Nf6+-) 13...Qd3 14.a4?? (better is 14.Qa4 Nf6 15.Qa7+-) 14...Bb4= 15.0-0 Bc3?? (better is 15...Nf6=) 16.Qb3 (better is 16.dc3 Qd1 17.Rd1 dc3 18.Nc3+-) 16...Qe2 17.dc3 Ne7 18.Ba3?? h5?? 19.Be7+- Rh8 20.Rab1 b6 21.a5! g5 22.Bg5 Rh7 23.ab6 ab6 24.Qg8 Rf7 25.Qd8 Kb7 26.Qd5 Kb8 27.Qf7 d3 28.Qe8 Kb7 29.Ra1 d2 30.Qa8# 1–0. esko – junderwood, net–chess.com, 2001.

4.e4 de4 5.Ne4 =+.

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

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

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

4.Bb2 d5 5.Bd4 Qf6?? 6.Bb2+- d4 7.c3 h5 (8.cd4 ed4+-; 7...a5 8.cd4 ed4 9.Qc2 ab4 10.Nf3+-) 1–0. hpillsbury – jacoben (1625), net–chess.com, 2007.

4.c3 Nc6=.

4.Nf3 d5 5.ed5 (worse is 5.Ne5 Qf6 6.c3 Qe5 7.cd4 Qd4–/+) 5...Qd5 6.Be2=.

4.Nf3 h6 5.Bd3 a5 6.c3 (better is 6.Nd4 ed4 7.Bb2+=) 6...g5?? (better is 6...Nf3 7.Qf3 ab4 8.cb4 Bb4+=) 7.cd4+- ed4 8.Nd4 b6 (8...ab4 9.Bb2+-) 9.0-0 a4 (9...ab4 10.Bb2 ba3 11.Na3+-) 10.Bc4 Bb7 11.d3 c5 12.bc5 bc5 13.Qh5 Rh7 14.Re1 (better is 14.Nf5+-) 14...Nf6 15.Nc3?? (better is 15.Qe2 cd4 16.Nd2+-) 15...Nh5–+ 16.Nf5 Qf6 17.Nd5 (17.Bb2–+) 17...Qa1 18.Nc7 Kd8 19.Bg5 hg5 20.Ra1 Kc7 21.f3 Nf4 22.g3 Nh3 23.Kg2 g4! 24.fg4 Ng5 25.h4 Ne6 26.g5 Nd4 27.Ne3 Bd6 28.Nd5 Kc6 (better is 28...Bd5 29.Bd5 Rb8 30.Ra2–+) 29.Nf6 (29.Rb1 Nb3! 30.Nf6 Rg7–+) 29...Nc2 (better is 29...Rhh8 30.Rb1 Rab8 31.Bf7–+) 30.Rc1 (30.Bd5 Kc7 31.Bb7–+) 30...Ne3 31.Kf2 Nc4 32.dc4 Rg7 (32...Rhh8 33.Re1–+) 33.Kf3 Be5 34.Ng4 Bb2 35.Rb1 (35.Rd1 Ba3 36.Ne5 Kb6 37.Nd7 Kc7–+) 35...Ba3 36.Ne5 Kc7 37.Kf4 d6 38.Nd3 Re8 39.h5 (39.Re1 Bb4 40.Re2 a3–+) 39...Re4 40.Kf5 Re3 41.Nf4 (41.Kf6 Rg5! 42.Kg5 Rg3 43.Kh4 Rd3–+) 41...Re5 42.Kg4 Rgg5 (better is 42...Reg5 43.Kh4 Rg4 44.Kh3 Rg3 45.Kh2–+) 43.Kh3 Bc6 44.g4 Bf3 45.h6 Bg4 46.Kh4 f6 (better is 46...Bc8 47.Nd5 Kd8 48.Nf6–+) 47.h7 Re8 48.Ne6 (48.Nd5 Rd5! 49.cd5–+) 48...Be6 49.Rh1 (49.Re1 Rh8 50.Re6 Rh7#) 49...Rh8 50.Rh3 (50.Rh2 Rh7#) 50...Rh7# 0–1. pieeater – redferarri, ChessWorld.net, 2011.

4.d3 de4 5.Nc3 –/+.

4.d3 Nf6 5.Nc3 (5.ed5 Nd5 6.Be2 Qf6+=) 5...a5 (5...d4 6.Nce2–/+) 6.b5+= Nd4 7.f3 (7.Bg5 de4 8.de4 Bg4+=) 7...c6 (7...Bc5 8.Bg5–/+) 8.a4 (8.bc6 bc6 9.Nge2 Rb8–/+) 8...Bd7 (8...Bb4 9.Bd2–/+) 9.Rb1 (9.Nge2 Bb4 10.Bd2 Ne2 11.Ne2 0-0–/+) 9...Bd6 (9...Bb4 10.Bd2–/+) 10.bc6 bc6 11.Bg5 (11.Nce2 0-0–/+) 11...Rb8 (11...Bb4 12.Bd2–/+) 12.Bf6 (12.Rb8 Qb8 13.Bf6 gf6–/+) 12...gf6 (12...Rb1 13.Bd8 Rd1 14.Nd1 Kd8–/+) 13.ed5? (better is 13.Na2–/+) 13...Bb4–+ 14.Qd2?? (14.Rb4 ab4 15.Nce2 c5–+) 14...cd5 (better is 14...Bc3 15.Qc3 Rb1 16.Kd2 Rf1 17.dc6 Bc6–+) 15.Nge2 Ba4! 16.Kf2 (16.Na4 Nc2 Double attack (16...Bd2 Pinning; 16...Bd2 Deflection)) 16...Bc2 (better is 16...Bc3 17.Nc3 Rb1 18.Nb1 Qb6–+) 17.Nd4 (17.Rb2 Bc5 18.Rb8 Qb8–+) 17...ed4 (better is 17...Bb1 18.Qc1 Bc3 19.Qc3 ed4–+) 18.Re1 Kf8 19.Qh6 Kg8 20.Re7?? (20.Rc1 dc3 21.Rc2 Qb6 22.Kg3–+) 20...Qe7 (20...Be7!? 21.Ne2–+) 21.Nd5 Rb6 (better is 21...Qe1 22.Kg1 Be7–+) 22.Ne7+/– Be7 23.Be2 (better is 23.Qc1 Rc6 24.Qe1+/–) 23...Bd8?? (23...Rb2 24.Rc1 a4 25.Kg3+=) 24.Qh4?? (24.Rc1 Rb2 25.Qd2 Be7 26.Rc2 Bb4 27.Rc8 Kg7+-) 24...Rb4?? (better is 24...Rb2 25.Qg4 Kf8+=) 25.Rc1 Kg7 (25...Rb2 26.Qg3 Kf8 27.Qd6 Be7 28.Qd4 Rb4+-) 26.Rc2 f5 (26...Re8+-) 27.Qg3 Kh6 (27...Kf8 28.Rc8 Ke7+-) 28.Rc6 Kh5 (28...f6 29.f4 Rg8 30.Qg8 a4 31.Qg5#) 29.f4# 1–0. willowsa – verbal, net–chess.com, 2002.

4.ed5= Qd5 5.Nc3 Qd6 6.Bb5 (6.Nf3!?+=) 6...a6= 7.Ba4 Be6 (7...Nf6 8.Nf3 b5 9.Bb3+=) 8.Nf3= b5 9.Bb3 Bb3 10.cb3 Qd3 11.Qe2 0-0-0 12.Qe4 (12.Qd3!? Rd3 13.Ke2=) 12...Qe4+= 13.Ne4 f5 14.Neg5 Nh6 (14...e4 15.Ng1 Ne5 16.Ke2+=) 15.Ne6 (15.Bb2!? Bd6 16.0-0=) 15...Rd6+= 16.Nc5 (16.Nf8!? Rf8 17.Bb2+=) 16...e4–/+ 17.Ng5 Nd4 18.0-0 (better is 18.Rb1 Rg6 19.h4–/+) 18...Nc2?? (better is 18...Rg6 19.h4 Bc5 20.bc5 Ng4–+) 19.Ra2= Nd4 20.Kh1?? (20.Ra1 Rg6 21.h4–+) 20...Rg6–+ 21.h4 Bc5 22.bc5 Nb3 23.Rc2 Rd8 24.Nh7?? (better is 24.f3–+) 24...Nf7 25.f4 (25.g3 Rh6 26.f3 ef3–+) 25...ef3! 26.Rf3 (26.Rf3 Nd4 Double attack (26...Nd4 Decoy); 26.gf3 Rh6 Combination) 26...Nd4 27.Rcc3 Nf3 28.Rf3 Ne5 29.Re3 (29.Ng5 Nf3 30.Nf3 Re8–+) 29...Nd3 30.Ng5 (30.Nf8 Rg4 (30...Nc1 31.Ng6 Kb7 32.Ne7–/+) 31.Ne6 Rd5–+) 30...Nc1 31.Nf7 (31.Nf3 Nd3 32.Re7 Rd7–+) 31...Rd2 32.Ng5 (32.c6 Re2 33.Rc3 Re1 34.Kh2 Rg4–+) 32...Rd4 33.g3 Rd3 34.Re8 Kb7 35.Kh2 (35.Re5 Rg3 36.Rf5 Ra3–+) 35...Ra3 36.Re5 (36.Re1 Nd3 37.Rb1 Nc5–+) 36...b4 37.Rf5 b3 38.Ne4 b2 39.Nd2 Rag3 40.Nb1 Ne2 (40...Ne2 41.c6 Kc6 42.Rg5 R6g5 43.hg5 Rg1 44.Na3 Ra1 45.Nb1 Rb1 46.Kg2 Re1 47.Kf3 b1Q 48.Kf2 Rf1 49.Ke2 Qd1 50.Ke3 Kd5 51.g6 Rf3#) 0–1. euforia (1800) – kropotkin (1615), internet, 2007.

4.Bb5 Bd7 5.d3 a6 6.Ba4 Nf6 7.Be3 (7.Nf3 b5 8.Bb3 Be7=) 7...Be7 (7...d5 8.Nf3 b5 9.Bb3+=) 8.Nf3= h6 9.Nbd2 0-0 10.0-0 b5 11.Bb3 Bg4 12.h3 Bf3 13.Qf3 (13.gf3 d5 14.f4 d4 15.fe5 de3 16.ef6 Bf6 17.fe3 Ba1 18.Qa1 a5–/+) 13...Nd4 14.Bd4 ed4 15.Rfe1 c5 16.e5 (16.bc5!? dc5 17.a4+=) 16...de5+= 17.Re5 (17.bc5 Qc7 18.Qf5 Bc5 19.Qe5 Qe5 20.Re5 Rac8+=) 17...Bd6 (better is 17...cb4 18.a4 Bd6–/+) 18.Ne4?? (better is 18.Rf5 cb4 19.Ne4 Ne4 20.de4 ba3 21.e5+=) 18...Be5–+ 19.Nc5 Qe7 20.Re1 Rfe8 21.Kh1 (21.g3 Qc7–+) 21...Qc7 22.Bd5 (22.Ne4 a5 23.Rd1 Qe7–+) 22...Nd5 (better is 22...Bd6!? 23.Rc1 Nd5 24.Qd5 Bc5 25.bc5–+) 23.Qd5 Qe7 (better is 23...a5–+) 24.f4 Qh4 (24...Rad8 25.Qf3 Qh4 26.Re5 Re5 27.fe5 Qe1 28.Kh2 Qe5 29.Qg3–+) 25.Re5 Re5?? (25...Qf4 26.Re4 Rad8 27.Rf4 Rd5 28.Nb3–+) 26.fe5 (better is 26.Qa8 Kh7 27.fe5 Qe1 28.Kh2 Qe5 29.g3+-) 26...a5?? (better is 26...Rd8 27.Qe4 Qe4 28.de4 Rc8–/+) 27.Qa8+- Kh7 28.Qe4 (28.Qa5?! Qe1 29.Kh2 Qe5 30.g3 Qe2 31.Kg1 Qe1 32.Kg2 Qe2 33.Kh1 Qe1 34.Kg2 Qe2 35.Kg1 Qe1 36.Kg2=) 28...Qe4 29.Ne4 Kg6 (29...ab4 30.ab4 Kg6+-) 30.ba5 1–0. groovenetwork – JanAnton, ChessWorld.net, 2012.

4.c3 Nf6–/+ 5.Qf3 (5.d3 d5 6.Nd2 Be6–/+) 5...Bg4 6.Qg3 Qd7 7.Bb5 (better is 7.f3 Be6 8.Nh3–+) 7...Ne4 8.Qe3 Nf6 9.h3 Be6 10.Nf3 a6 (10...Nd5!? 11.Qe4 f5 12.Qc2–+) 11.Bc6 Qc6 12.a4?? (12.0-0 Nd5 13.Qe4–+) 12...Nd5 13.Qe4 g6 (better is 13...f5 14.Ne5 de5 15.Qe5 Kf7–+) 14.b5 Qb6 (14...ab5 15.ab5 Ra1 16.bc6 bc6 17.0-0+-) 15.Ng5 Nf6 (15...ab5 16.Ne6 fe6 17.0-0–+) 16.Qe3 (16.Qf3 Be7 17.Ne6 fe6–+) 16...Qe3 17.de3 Bd5 18.0-0 (18.ba6 Ra6 19.0-0 Bh6–+) 18...ab5 19.Bb2 (19.a5 h6 20.Nf3 Be7–+) 19...Bh6 20.h4 (20.f4 ba4 21.c4 Bc4–+) 20...0-0 (better is 20...Ra4 21.Nd2 Ke7 22.Ra4 ba4 23.c4–+) 21.ab5 Bc4 22.Ra8 Ra8 23.Nd2 (23.Rc1 Ra2 24.Na3–+) 23...Bf1 24.Kf1 (24.Nf1 Ra2 25.Bc1 Bg5 26.hg5 Ne4–+) 24...Ra2 25.Nc4 d5 26.Ne5 Rb2 27.Ngf7 Bg7 28.Ng5 (28.f3 Nh5–+) 28...Ne4 29.Ne4 Be5 30.f4 (30.Nc5 Rb5 31.Ne6 Rb6–+) 30...Bg7 (30...de4 31.fe5 Kf7 32.c4–+) 31.Nc5 (31.Ng5 Rb5 32.Ke2 Bc3–+) 31...Rb5 32.Na4 (32.Ne6 c6 33.Nd4–+) 32...Ra5 33.Nb2 Bc3 (better is 33...Ra1 34.Ke2 Ra2 35.g3–+) 34.Nd3 (34.Nd1 Bf6–+) 34...b5 35.Nc5 Ra2 (35...b4 36.Nb3 Ra3 37.Nc5–+) 36.Ne6 (36.g4 b4 37.f5 gf5 38.gf5 Ra5–+) 36...c6 37.Nc5 b4 38.g4 Ra3 39.Ke2 b3 40.f5 gf5 (40...b2 41.e4 b1Q 42.ed5 Qc2 43.Kf3 Be5 44.Nd3 Rd3 45.Ke4 Qe2#) 41.gf5 b2 42.f6 (42.Nd3 b1Q 43.Nb2 Ra1 44.Kf3 Qf5 45.Kg2 Qg4 46.Kf2 Rg1 47.Nc4 Qg2#) 42...Bf6 43.h5 (43.Nd7 Bh4 44.Nf6 Bf6 45.Kf3 b1Q 46.Kf2 Bh4 47.Kg2 Qf5 48.Kg1 Qc2 49.e4 Ra1#) 43...b1Q 44.h6 (44.Ne4 Qd3 45.Kf2 Qe3 46.Kf1 Qe4 47.h6 Ra2 48.Kg1 Qg2#) 44...Bd4! 45.ed4 (45.ed4 Qc2 Mate attack) 45...Qb2 46.Kd1 Ra1# 0–1. ChessNo1 – unitedfan, ChessWorld.net, 2005.

4.Nf3!?=.

4.Nc3 Nd4=.

4.Nc3 d5 5.ed5 Nd5 6.Bb5 =+.

4.Nc3 d5 5.ed5 Nd5 6.Ne4 Bf5 7.Bd3? (better is 7.Ng3 Be6 8.Nf3+=) 7...Nf4–+ 8.Qf3? (better is 8.Nd6 Qd6 9.Bf5 Ng2 10.Kf1–+) 8...Nd4 (8...Nd3?! 9.cd3 Nd4 10.Qd1–+) 9.Qg3 b6 (9...Qd5 10.Nc3 Qg2 11.Bf5 Nf5 12.Qg2 Ng2 13.Kf1–/+) 10.Nf3 (10.Kd1 a5 11.Bb2 Nd3 12.Qd3 ab4–+) 10...c5 11.Ne5? Nh5?? 12.Qe3+/– Be6 13.c3 Nb3?? 14.Bb5 Ke7 15.Nc6 Kd7 16.Nd8 Kd8 17.Qd3 Kc7 18.Rb1 Nf4 19.Qg3 a6 20.Qf4 (20.Qf4 Kd8 21.bc5 ab5 22.cb6 Bh3 23.b7 Rc8 24.Rb3 Be6 25.Nd6 Bd6 26.Qd6 Bd7 27.Rb5 Re8 28.Kd1 Re1 29.Re1 h6 30.bc8R Kc8 31.Rb8#) 1–0. Labrousse,Jeanne – Livet,Alain, Pays de Loire–chT, 2009.

4.Nc3 d5 5.ed5 Nd5 6.Nf3 +=.

4.Nc3 d6 5.f3 (better is 5.Nf3!?=) 5...d5–/+ 6.b5 (6.Bb2 d4 7.Na4 a6–/+) 6...Na5 (6...Nd4 7.d3–+) 7.ed5 (7.d4!? ed4 8.Qd4+=) 7...Nd5 8.Nd5 Qd5 9.a4 (9.Bb2!?–/+) 9...Bc5 10.c4?? (better is 10.Ba3 0-0 11.Ne2–+) 10...Nc4 (better is 10...Qd4 11.Nh3 Bh3 12.Qc2 Qa1 13.gh3–+) 11.d3? (11.Qb3 Qd4 12.Qc4 Qf2 13.Kd1 Be6–+) 11...Nd6 (better is 11...Qd4 12.Qc2 Bb4 13.Ke2 Qa1 14.dc4–+) 12.g4 (12.Ne2 0-0 13.Ba3–+) 12...f5 (12...Bg1!? 13.Rg1 Qd4 14.Bh6 gh6 15.Rg2–+) 13.Qe2 (13.gf5 Qd4 14.Ra2 Qh4 15.Kd2 Nf5–+) 13...fg4 14.Bb2 (14.Be3 0-0 15.Bg2 Bb4 16.Bd2 Qd4–+) 14...Bb4 (better is 14...0-0!? 15.Rc1 gf3 16.Nf3 Rf3 17.Bg2 Bb4 18.Bc3–+) 15.Kd1 gf3 16.Nf3 (16.Qe5 Be6 17.Qd5 Bd5 18.Nh3–+) 16...Bg4 17.Bg2 0-0 18.h3 (18.Kc2 Rae8 19.Rad1 e4 20.de4 Re4 21.Rd5 Re2 22.Kc1 Bf3 23.Bf3 Rf3–+) 18...Bh5 (18...Bh5 19.Kc2 Rae8–+) 0–1. etron – aroccos, net–chess.com, 2008.

4.Nc3 Bd6 5.Nb5? (better is 5.Nf3=) 5...Be7–/+ 6.Nf3 d6 (6...Ne4 7.d3 Nf6 8.Be2–/+) 7.Bc4 (7.Bd3 a5+=) 7...h6 (7...Ne4 8.Qe2 Nf6 9.Bb3–/+) 8.0-0 (8.Nc3 Bg4=) 8...Ne4+= 9.d3 (9.Re1 a6 10.Re4 ab5 11.Bb5 Bf5–/+) 9...Nf6–/+ 10.c3?? (better is 10.d4 e4 11.d5 ef3 12.dc6 bc6 13.Nd4 fg2 14.Re1–/+) 10...a6–+ 11.a4 ab5 12.Bb5 Bd7 13.Re1 Na7 14.Bd7 Qd7 (14...Kd7?! 15.Qb3–+) 15.d4 (15.Bb2 Nc6–+) 15...ed4 (better is 15...e4!? 16.Nd2 d5 17.Ba3–+) 16.Nd4 Nd5 (better is 16...0-0–+) 17.Ra2?? (better is 17.Qf3 Nb6 18.Nf5+=) 17...Nc3–+ 18.Qd2 Na2 19.Qa2 0-0-0 (19...0-0!? 20.b5–+) 20.Qf7 (20.Be3 Bg5 21.a5 Rhe8–+) 20...Bf6 21.Qg6 (21.Qd7 Kd7 22.Rd1–+) 21...Bd4 22.Re6 (22.Qd3 Rhe8 23.Rd1 Qe6–+) 22...Bf6 (better is 22...Rde8 23.Re3–+) 23.b5 Qe6 24.Qd3 Qe1 25.Qf1 Rde8 26.f4 Re2 (26...Bd4 27.Be3 Be3 28.Kh1 Qf1#) 27.g4 Bd4 (27...Bd4 28.Be3 Be3 29.Kh1 Qf1#) 0–1. chessstler – zseqsx, Live Game Caissa's Web, 2004.

4.d3 d5 5.ed5 Nd5 6.c4 Nf6 (6...Nf4 7.Nf3–/+) 7.Be2 (7.Nf3 e4 8.de4 Qd1 (worse is 8...Ne4 9.Qd8 Nd8 10.Bd3+=) 9.Kd1 Ne4+=) 7...a5 (7...Qd4 8.Ra2 Ng4 9.Nh3+=) 8.b5 Nd4 9.Nf3 Bc5 (worse is 9...Ne2 10.Qe2 Bd6 11.Nbd2= (worse is 11.Ne5 0-0 12.0-0 Re8+=)) 10.Bb2 0-0 11.0-0 Bf5 12.Nc3 (12.Nd4 Bd4 13.Nc3 Qd6–/+) 12...Re8 (better is 12...Nf3 13.Bf3 Bd3–/+) 13.Nh4? (better is 13.Nd4 Bd4 14.Qc2+=) 13...Ne2–+ 14.Ne2 Bd3 (14...Qd3?! 15.Ng3 Qc2 16.Be5 Re5 17.Nhf5 Qc4 18.Qf3–+) 15.Re1 (15.Nf3 e4 16.Ne5–+) 15...Ng4 16.Rf1 (16.Nf3 Bf2 17.Kh1–+) 16...Qh4 17.h3 Nf2 18.Rf2 Qf2 (18...Qf2 19.Kh1 Bc4–+) 0–1. chessH – PassedPawn, ChessWorld.net, 2003.

4.d3 d5–/+ 5.ed5 Nd5 6.Be2 Qf6 7.Bb2 (7.Nf3 Bd6–/+) 7...Be6 (7...a5!? 8.Bf3 Nb6 9.Bc6 Qc6 (9...bc6?! 10.Nf3+=) 10.ba5 Ra5–/+) 8.Nf3–/+ 0-0-0 (8...Bd6 9.g3 Qf5 10.Nbd2=) 9.0-0+= Nf4 10.g3 Ne2 11.Qe2 Now all is on e5 11...Nd4 12.Nd4 ed4 13.Nd2 h5 14.Ne4 Qg6 15.Nc5 Bc5 16.bc5 Bh3 17.Rfe1 Qc6 18.f4 (18.Qe4!? Qc5 19.Rab1–/+) 18...Qc5–+ 19.Qe5 (19.Rac1 h4–+) 19...Qc2 20.Re2? (better is 20.Qe2 Qe2 21.Re2–+) 20...Qd3 21.Rc1 Rd7 22.Rce1 (22.Rec2 c6–+) 22...h4 23.Qe4 Qe4 24.Re4 c5 25.Re8 (25.Rc1 Rc7–+) 25...Re8 26.Re8 Kc7 27.Rh8 c4 (27...c4 28.Rh5 Kc6–+) 0–1. chessH – marekt, ChessWorld.net, 2003.

4.f3 d5 5.Nc3 de4 6.fe4 Be7 7.Bc4 Qd4 (better is 7...a5 8.b5 Nd4+=) 8.Nf3?? (better is 8.Qe2=) 8...Qc4–+ 9.d3 (9.b5 Nd4 10.Ne5–+) 9...Qc3 10.Bd2 Qa1! 11.Qa1 Bg4 (better is 11...a5 12.b5 Nd4 13.Nd4 ed4 14.Qd4 Ba3 15.Qe5 Be7–/+) 12.Ng1?? (better is 12.Ne5 Ne5 13.Qe5+=) 12...a5 (12...0-0-0 13.Ne2–+) 13.b5 (13.ba5 0-0–+) 13...Nd4 14.Qc1 (14.Qc3 Nb5 15.Qe5 Na3 16.Qc7 Rc8 17.Qb7 Nc2 18.Kf1 a4–+) 14...0-0-0 (better is 14...Ba3!? 15.Qb1–+) 15.h3 Bh5 16.a4 c6?? (better is 16...b6–+) 17.Ba5–/+ Rde8 18.bc6 bc6 19.Qb2 Kd7 20.g4 Bg6 (20...Rb8 21.Qa2 Bg6 22.h4–+) 21.c3 Ne6 22.Qb7= Kd6 23.Nf3 c5?? 24.Qb6 Kd7 25.Ne5 Kc8 26.0-0 Rd8 27.Rb1 Rd3 28.Qb8# (28.Qb7#) 1–0. Matthias – FreshPrinc2, mySchach.de, 2005.

4.f3 Ne4 5.Ne2 Nf6 6.b5 –/+.

4.Nf3 b6 5.Bc4 h6 6.0-0 Be7 7.d4 d6 8.de5 de5 9.b5 Na5 10.Ne5 Nc4 11.Nc4 Qd1 12.Rd1 0-0 (12...Ne4 13.Re1 Nc5 14.Ne3=) 13.Bf4 (13.e5 Nd7+/–) 13...Ne8? (13...Ne4!? 14.Re1 Bf6=) 14.a4 Bb7 15.f3 Bc5 16.Kh1 Rc8 17.Rd5?? (better is 17.Be3 Bb4 18.c3+-) 17...Bd5–+ 18.ed5 Nd6 (18...Nf6 19.Nc3 Bd4 20.Be5 Bc3 21.Bc3 Nd5 22.Bd2–+) 19.Ne5 Rfe8 20.Nc6?? (better is 20.Nd3–/+) 20...Re1# 0–1. Kunk – Geordiedazza, ChessWorld.net, 2003.

3.Ra2 f5 4.c4 Nf6 5.e3 Be7 6.Ne2 0-0 7.g3 Be6 8.Bg2 Bc4 9.Rb2? (9.Bb7 Ba2 10.Ba8 Nbd7-/+) 9...a5 (9...e4 10.Qc2 d5 11.Nf4-+) 10.b5 Nbd7 11.d3 Be6 12.0-0 Rb8 13.Nbc3 b6 14.Bc6 Nc5 15.f3 Bd7 16.d4 Bc6 17.dc5? (better 17.bc6 Ne6 18.Rb5 ed4 19.Nd4 Nd4 20.ed4= (worse 20.Qd4 d5-/+)) 17...Be8-+ 18.c6 Bf7 19.e4 (better 19.Qd3 d5 20.a4-+) 19...fe4 20.fe4 d5 21.Nd5 (21.ed5 Ba3 22.Rd2 Bc5 23.Kg2-+) 21...Nd5 22.ed5 (22.Rf7 Rf7 23.ed5 Ba3-+) 22...Qd5 (22...Bc5 23.Rf2 Bh5 24.d6 Rf2 25.Be3-+) 23.Rd2 (23.Qd5 Bd5 24.Rc2 Bc5 25.Rc5 Rf1 26.Kf1 bc5-+) 23...Qc5 (23...Bc5 24.Nd4 ed4 25.Rd3-+) 24.Kh1 (24.Kg2 Qb5 25.Nc3 Qc4 26.Rf7 Rf7-+) 24...Rbd8 (better 24...Bd5 25.Rd5 Rf1 26.Qf1 Qd5 27.Qg2 Qd1 28.Ng1 Bc5-+) 25.Bb2 (25.Rf7 Kf7 26.Qb3 Kg6 27.Qb1 Kf6 28.g4-+) 25...Rd2 26.Qd2 Bd6 (26...Bd5 27.Qd5 Qd5 28.Kg1 Bc5 29.Bd4 Bd4 30.Nd4 Qd4 31.Kg2 Qe4 32.Kg1 Qe3 33.Kh1 Rf1 34.Kg2 Rg1 35.Kh3 Qg5 36.a4 Qh5) 27.Kg2 (27.Nc3 Bd5! 28.Qd5 Qd5 29.Nd5 Rf1 30.Kg2 Rd1 31.Nb6 cb6-+) 27...Qd5 (better 27...Bd5 28.Kh3 Rf1 29.Nd4-+) 28.Qd5 Bd5 29.Kh3 (29.Kg1 Bc5 30.Nd4 ed4 31.Rf8 Kf8 32.Kf2-+) 29...Rf1 30.Nc3 Rf2 (30...Bf3 31.Ne4 Be4 32.g4 Rf3 33.Kg2 Rb3 34.Kf2 Bc5 35.Bd4 Bd4 36.Ke1 Rb2 37.g5 Bc3 38.Kd1 Bd3 39.a4 Rb1) 31.Nd5 Rb2 32.Nb6 cb6 33.c7 Bc7 34.Kg4 Rb3 (34...e4 35.Kg5 e3 36.Kg4 e2 37.Kh4 e1Q 38.Kg5 Qe4 39.a4 Rh2 40.g4 h6) 35.h4 Ra3 36.Kf5 Rb3 37.Ke6 Rb5 38.Kd7 (38.Kf5 a4 39.Ke6 a3 40.Kd7 Rc5 41.g4 a2 42.Kc8 a1Q 43.g5 Kf7 44.Kb7 Qh1 45.Kc8 Ke6 46.h5 Qa8) 38...Rc5 39.Kc8 (39.g4 e4 40.g5 e3 41.g6 e2 42.h5 hg6 43.h6 e1Q 44.h7 Kh7 45.Kc8 Qe8 46.Kb7 Qb8 47.Ka6 Qa8) 39...e4 40.Kb7 (40.g4 e3 41.Kd7 e2 42.g5 e1Q 43.g6 Qd2 44.Kc8 Qd5 45.gh7 Kh7 46.h5 Be5) 40...e3 41.g4 (41.h5 e2 42.h6 e1Q 43.hg7 Qe8 44.Ka7 Qb8 45.Ka6 Qa8) 41...e2 42.g5 (42.Kc8 e1Q 43.Kb7 Qe8 44.Ka7 Qb8 45.Ka6 Qa8) 42...e1Q 43.g6 (43.h5 Qe4 44.Ka7 a4 45.h6 Ra5) 43...Qe4 44.Ka6 (44.Ka7 h5 45.Ka6 Qa8) 44...Qc4 (44...Qa8) 45.Kb7 (45.Ka7 Bh2 46.gh7 Kh7 47.h5 Rc7 48.Kb6 Bg1 49.Ka5 Ra7) 45...Bh2 (45...h5 46.Kc8 a4 47.Kb7 Qd5 48.Ka7 Ra5) 46.gh7 Kh7 47.h5 (47.Ka7 Rc7 48.Kb6 Bg1 49.Ka5 Ra7) 47...Rc7 48.Ka8 (48.Kb6 Bg1 49.Ka5 Ra7) 48...Qc6 (48...Qg8) 49.Kb8 Qb7 (49...Qe8) 0-1. peonie (2050) - kalounardo (2260), Rated Bullet tournament CjQRsT84, lichess.org, 2015. (=1.a3 A00: Irregular Openings 1...d6 2.b4 e5)

3.c3 Nf6 4.d4 Nbd7 5.e3 Be7 6.f4 0-0 7.g3 ef4 8.ef4 a5 9.g4 ab4 10.cb4 d5 11.f5 (11.Bd2–+) 11...Bb4! 12.Ke2 (12.ab4 Qe7 Double attack (12...Ra1 Pinning; 12...Ra1 Deflection; 12...Qe7 Decoy)) 12...Re8 13.Kd3 (13.Kf2 Re1 14.Qf3 Rc1–+) 13...Re1 14.Qe1 (14.Qb3 Rf1 15.Qb4 Rc1–+) 14...Be1 15.Be2 (15.h3 Ne4 16.Be3 Qf6–+) 15...Qe8 16.Nf3 (16.Nd2 Bf2 17.Bb2–+) 16…Qe4 0–1. Norsworthy,Elizabeth – Owens,Johnny, IECG Cat–T email, 1995. (=1.a3 e5 2.b4 d6)

3.Nc3 a5 4.b5 (4.ba5 d5 5.e4 d4 6.Nce2 Ra5 7.Ng3 Nf6=+) 4...d5 5.d4 ed4 6.Qd4 Nf6 7.Bg5 Be7=.

3.Nc3 Nc6 4.Nf3 Be6 5.b5 Na5 6.d4 ed4 7.Nd4 Qf6 8.g3 Ne7 9.Bg2 Rb8 10.Ne4 Qg6 11.0-0 Nf5 12.Nc3 Be7 13.Ne6 fe6 14.e4 Nh6 15.Ne2 0-0 16.Nf4 Qf6 17.Be3 b6 18.Bh3 e5 19.Nd5 Qg6 (19...Qf7 20.f4 Bd8 21.fe5 Qe8 22.Rf8 Kf8 23.Qf1 Kg8 24.Bh6 c6 25.bc6 Nc6 26.ed6 b5+-) 20.Ne7 Kh8 21.Ng6 hg6 22.Be6 Nb7 23.Bd5 Nc5 24.f4 Ng4 25.Qg4 ef4 (25...Rf5 26.ef5 Ne6 27.Be6 gf5 28.Qh5#) 26.Qh4# 1–0. usingprogram (2040) – bumby, kurnik, 2011.

3.Nc3 d5 A) 4.d4 e4 5.Bf4 a5 6.e3 Nf6 7.Ra2 Be7=+; B) 4.Nf3 e4 5.Nd4 Nf6 6.d3 a5 7.ba5 Be7=+; C) 4.e4 d4 5.Nce2 Nf6 6.Ng3 a5 7.b5 Bd6=+; D) 4.e3 Nf6 5.Nf3 a5 6.b5 Bd6 7.Bb2 0-0=+.

3.Nc3 Be7 4.Nf3 h5 (4...Nf6 5.e4=) 5.e3 (5.e4 Nf6+=) 5...c6 (5...Nf6 6.Bb2=) 6.d4+= ed4 (6...Nd7 7.Be2+=) 7.ed4+/– Bf6 (7...a5!? 8.b5 Nf6+/–) 8.Bd3+- Ne7 (8...Bg4!? 9.0-0 Ne7 10.Be3+/–) 9.Ne4 Nd5 (9...Nf5 10.Nf6 Qf6 11.0-0 Nd4 12.Nd4 Qd4 13.Re1 Kf8 14.Bg5+-) 10.c4 Nc7 11.0-0 Bg4 12.Nf6 gf6?! (12...Qf6 13.Qe1 Qe7+-) 13.Re1 Kd7 14.h3 Be6 15.Bf4 Rg8 (15...Kc8 16.Nh4 Nd7 17.d5+- (worse is 17.Bd6 Nb6 18.d5 cd5+-)) 16.Nh4 Bh3 (16...d5 17.c5+-) 17.Qh5 Qf8 (17...Be6 18.Nf5 Rh8+-) 18.Bf5 Bf5 (18...Ne6 19.Bh3 Kc7 20.Be6+-) 19.Qf5 Kd8 (19...Ne6 20.d5 Qe7 21.Rad1+-) 20.Qf6 Kc8 21.Nf5 Nd7 (21...Ne6 22.Bd6 Nd7 23.Ne7 Kd8 24.Nc6 Kc8 25.Ne7 Kd8 26.Qf3+-) 22.Ne7 Kb8 (22...Kd8 23.Nc6 Kc8 24.Ne7 Kd8 25.Qd6 Rg2 26.Kg2 Ne6 27.Re6 fe6+-) 23.Qd6 Qc8 24.Nc8 Rc8 (24...Ne5 25.Qe5 Rc8 26.Qc7 Rc7 27.Re8) 25.Qc7! Rc7 (25...Rc7 26.Re8#) 26.Re8 1–0. pierre – kavayah1, internet, 2015.

3.Nc3 h6 4.Nf3 g5 5.h3 Nf6 6.e4 Bg7 7.Bc4 0-0 8.0-0 Nc6 9.Qe2 Nd4 10.Qd3 Nf3 11.Qf3 c6 12.Bb2 Be6 13.Be6 fe6 14.Qd3 d5 15.Rae1 de4 16.Qc4 Qd6 17.Ne4 Ne4 18.Qe4 Qd2 19.Be5 Be5 20.Qe5 Qd7 21.Qe6 Qe6 22.Re6 Kg7 23.Rd1 Rad8 (23...a5!?+-) 24.Re7 Kf6 25.Rd8 Ke7? (25...Rd8 26.Rb7 Rd1 27.Kh2 Rd2 28.Ra7 Rc2+-) 26.Rf8 Kf8 27.f4! gf4 (27...Ke7 28.fg5 hg5 29.Kf2+-) 28.Kf2 Ke7 29.Kf3 Kd6 30.Kf4 c5 (30...Ke6+-) 31.bc5 Kc5 32.g4 b5 (32...Kc6 33.Kf5 Kc5 34.h4+-) 33.h4 White prepares the advance g5 33...b4 (33...Kd6 34.Kf5 a5 35.g5 hg5 36.hg5+-) 34.ab4 Kb4 35.g5 hg5 36.hg5 a5 37.g6 a4 38.g7 a3 39.g8Q a2 (39...Kc3 40.Qb3 Kd4 41.Qb5 a2 42.Qb2 Kc5 43.Ke5 a1Q 44.Qa1 Kc6 45.Qh1 Kb6 46.Kd6 Ka6 47.Qb1 Ka5 48.Kc5 Ka4 49.Qb4) 40.Qa2 Kc3 (40...Kc5 41.Ke5 Kb6 42.Kd6 Kb5 43.Qb3 Ka5 44.Kc5 Ka6 45.Qb6) 41.Ke4 Kb4 42.Kd4 Kb5 43.Qe6 Kb4 44.Qb3 Ka5 45.Kc5 1–0. Janek – Christopher, internet, 2016.

3.c4 Na6 4.g3 c5 5.b5 Nc7 6.Bb2 f5 (6...Nf6 7.Bg2=+) 7.Bg2= Nf6 8.a4 g6 (8...Be7 9.Nh3=) 9.d3 Bg7 10.e3 0-0 11.Ne2 Qe7 12.0-0 d5 13.Nd2 Rd8 14.Qb3 Kh8 15.Rad1 d4 16.ed4 ed4 17.Rfe1 Re8 18.Nf3 Ne6 19.Nf4 Qc7 20.Bc1 Bd7 21.Ne5 Nf8 22.Nf7 (22.Nd7 Qd7 23.a5 Re1 24.Re1 Re8 25.Re8 Qe8+/–) 22...Kg8 23.Ng5 Re1 24.Re1 Re8 25.Qd1 h6 26.Nd5 Qd8 27.Nf6 Qf6 28.Bd5 Kh8 29.Re8 Be8 30.Qe2 Bd7 31.Nh3 b6 32.Nf4 Qd6 33.a5 (33.Bd2 Kh7+=) 33...ba5= 34.Qe1 Kh7 (34...g5 35.Nh5=) 35.Qa5+= Qb6 36.Qe1 Qd6 37.h4 Bf6 38.Qa5 Qb6 39.Qa2 Bg7 40.Qe2 Qd6 41.Ba3 Bf6 42.Kg2 Bg7 43.Bc1 Be5 44.Kh2 (44.Qa2 Qc7+=) 44...Bc8 45.Kh1 Bd7 46.Qa2 Qc7 47.Qd2 Bg7 48.Qe2 Qd6 49.Kh2 Be5 50.Qe1 Bc8 51.Qe2 (51.Kg1 a6 52.b6 Bd7+/–) 51...Qf6 (51...Bd7!?=) 52.Qd2 Qd6 53.Bh1 Nd7 54.Nd5 Qf8 55.h5 g5 56.Kg1 Nb6 57.Qa5 Qg7 58.Ba3 Nd5 59.Bd5 (< 59.cd5 Qe7=+) ½–½. Luzuriaga,Norberto Horacio – Blankenberg,Bruno, 2. b4 Thementurnier, 2000.

3.c4 Qh4 4.e3 a6 (4...Qg4 5.Qg4 Bg4 6.Be2=) 5.Nf3 Qf6 (5...Qe7 6.Nc3=) 6.Be2 (6.Nc3 Ne7=) 6...b6 (6...e4 7.Nd4=) 7.0-0 (7.Nc3 e4 8.Nd4 Qg6=) 7...e4= 8.Nd4 Bb7 (8...c5 9.Nc2 cb4 10.ab4+=) 9.Nc3 (9.f3 Qg5+=) 9...c5+= 10.bc5 (10.Nc2 Qg5+=) 10...bc5 (better is 10...dc5!? 11.Nc2 Bd6=) 11.Nb3 (11.Qa4 Kd8 12.Rb1 cd4 13.Qa5 Ke8+-) 11...Nd7 (11...Qg6 12.Rb1 Bc6 13.Na5+-) 12.Nd5 (12.Na5!? Bc8 13.Qc2+/–) 12...Bd5= 13.Rb1?? (better is 13.cd5 Qg5 14.Bc4+=) 13...Bc6–+ 14.Bb2 (14.Na5 d5–+) 14...Qg5 15.g3? a5 16.d4 a4 17.h4 Qf5 18.Nd2 (18...d5 19.dc5 Nc5 20.cd5 Qd5 21.Bc4–+) 0–1. gdraper (2035) – sbderkach (1680), net–chess.com, 2006.

3.c4 h6 4.e4 (4.Nf3 e4 5.Nd4 Nf6=) 4...g5 (4...Nf6 5.Nc3=) 5.h3 (5.d3 Nf6=) 5...Bg7 (5...Nf6 6.Nc3=) 6.Bb2 (6.Nc3 Nc6=) 6...a6 (6...a5 7.Qa4 Bd7 8.b5=) 7.Nc3 Ne7 8.g3 (8.Nf3 f5=) 8...0-0 (8...Nbc6 9.Nf3=) 9.Nd5 (9.g4 Ng6=) 9...Nd5=+ 10.cd5 b5 (10...f5 11.d3=+) 11.d4 Nd7 (11...f5 12.de5 fe4 13.Qe2=) 12.Nf3 (12.h4 ed4 13.hg5 Qg5=) 12...Re8 (12...f5 13.ef5 e4 14.Nd2=+) 13.Bg2 (13.de5 f5 14.Qc2 Ne5 15.Ne5 Be5 (< 15...de5 16.Bg2+=) 16.Be5 A) 16...de5? A1) 17.ef5?! Qd5 18.f6 Qf7= (18...Qh1?? 19.Qg6 Kh8 20.Qg7); A2) 17.Qc6 Rb8 18.Qg6 Kh8 19.Qh6 Kg8 20.Qg6 Kf8 21.Rc1+-; B) 16...Re5=+) 13...ed4 (13...f5!? 14.ef5 ed4 15.Kf1 Nb6=) 14.Nd4+= Bd4 (better is 14...Nf6!? 15.Nc6 Qd7 16.Bf6 Bf6+=) 15.Qd4+/– f6 (15...Ne5 16.0-0 f6 17.f4 gf4 18.Rf4+/–) 16.0-0 Ne5 17.f4 (17.Qc3 Rf8+/–) 17...gf4 18.Rf4 Rf8 (18...a5 19.Raf1 ab4 20.ab4+/–) 19.Raf1 Kg7 (19...Qe7 20.Kh2+/–) 20.Qd1 (better is 20.Qd2+-) 20...Nc4?? (better is 20...a5+/–) 21.Bf6+- Rf6 22.Qd4 Ne5 23.Rf6 Kh7 (23...Qf6 24.Rf6 Kf6+-) 24.Qd2 Bd7 25.Qh6 Kg8 26.Qg5 Ng6 27.Rg6 (27...Kh7 28.Rh6#) 1–0. ashoka_theking (1685) – corint, internet, 2007.

3.d4 Nc6 4.de5 (4.d5 Nb8= (4...Nce7 5.Nc3 Bg4 6.Nf3 Nf6 7.e4 a5+=) 5.e4 Nf6 6.Nc3 Be7 7.Nf3 Nbd7=; 4.e3 e4 (4...ed4 5.ed4 Qe7 6.Be2 Nf6 7.Nf3 Bg4+=; 4...a6 5.d5 Nce7 6.Nc3 Nf6 7.e4 c6=) 5.d5 Ne5 6.f4 ef3 7.Nf3 Nf6=) 4...Ne5 (4...de5 5.Qd8 Nd8 6.e4 a5 7.Nf3 Nf6=) 5.Nc3 (5.e4 Nf6 6.Nc3 a5 7.b5 Be7=) 5...Be6 (5...Nf6 6.e4=+ Be7 7.f4 Ned7=; 5...a5 6.b5 Be7 7.Nf3 Bf6=) 6.e4 (6.Nf3 Nf3 (6...Nf6= 7.e4 Be7=) 7.ef3 Qf6=) 6...Qf6 (6...Be7 7.Nf3= (7.Nge2 Bg4=) 7...Bf6=) 7.Be3 (7.Nd5 Qd8=) 7...g5 (7...Ng4 8.Bd4 Qf4 9.Nh3+/–) 8.Nb5+= Qd8 (8...Kd8 9.h4 gh4 10.f4+= (< 10.Na7 Bg7 11.Nb5 Nd3 12.Bd3 Qa1=+)) 9.Bg5!+/– (9.Ba7?! b6=) 9...Qg5? (better is 9...Be7 10.Be3 Nf6+/–) 10.Nc7+- Kd8 (10...Kd7 11.Na8 Bg7 12.g3+/–) 11.Na8 1–0. Token – supreambeing, itsyourturn.com, 2001.

3.d4 Nd7 4.Nc3 Ngf6 5.e4 ed4 6.Qd4 g6 7.Bc4 Bg7 8.Nge2 a5 9.Bb2 Ne5 10.Bb3 Nfg4 11.0-0-0 (11.Qd2!?=) 11...0-0 12.Nd5 ab4 13.ab4 b6 14.f4 c5 15.Qc3 Ba6 16.Qe1 (16.fe5? Be2 17.Rde1 Be5-+) 16...Nc6 17.Bg7 Kg7 18.Ng3 Bb7 19.Qc3 f6 20.Rd2 Nd4 21.h3 Nh6 22.Rhd1 Nb3 (22...Ra3 23.Nc7 Qc7 24.Rd4-/+) 23.Qb3= Nf7 24.Qb2 (24.b5 Ra5=) 24...Bd5 25.Rd5 Qe7 26.R5d3 Ra4 27.bc5 bc5 28.Rb3 Rc8 29.Ra3 Rb4 30.Qa2 c4 31.Ra7 Rc7 32.Rc7 Qc7 33.Rd4 d5 34.ed5 (34.Rd5 Qf4 35.Kd1 Qg3-+) 34...Nd6 35.Ne2 Qc5 36.g4 (36.c3 Rb3 37.Qa4 Rc3 38.Nc3 Qd4-/+) 36...Rb3 37.Qa4 Re3 38.Qc6 Qa3 39.Kd1 Re7 (39...Rh3?! 40.Qc7 Nf7 41.Qc4=) 40.g5 fg5 41.Rd2 (41.fg5 Qh3 42.Qd6 Qf1 43.Kd2 Re2 44.Kc3 Qa1 45.Kc4 Rc2 46.Kb5 Rb2 47.Rb4-/+) 41…Ne4 (41...Ne4 42.Qc4 Qa1 43.Nc1 Nc3 44.Qc3 Qc3 45.fg5 Qf3 46.Re2 Qh1 47.Kd2 Qd5 48.Ke1 Qg5 49.Re7 Qe7 50.Kd1 Qd7 51.Nd3 Qh3-+) 0-1. bolaf (2165) - marekt (2155), gameknot.com, 2019.

3.d4 e4 4.d5 f5 (4...Be7 5.Nc3 Bf6 6.Bb2=+) 5.f4 (5.Bb2 e3=) 5...Nf6 (5...Be7 6.Bb2 Bh4 7.g3=+) 6.e3 Nbd7 7.Bb5 a6 8.Be2 Nb6 9.h3? (better 9.c4=+) 9...Nfd5–+ 10.g3 Qf6 11.Qd4 (11.Ra2 Qf7 12.c4 Nf6–+) 11...Qd4 (better 11...Be7!? 12.Ra2 Qg6 13.Kf2–+) 12.ed4 h5 (12...Nf6 13.c4–+) 13.h4 (13.c4 Nf6–/+) 13...g6 14.Nh3 (14.c4 Ne7 15.d5 Bg7–+) 14...Bh6 (14...Bg7!? 15.c3–+) 15.c4–/+ Nf6 (15...Ne7 16.Be3–/+) 16.a4 White prepares b5 (16.0-0 Bg7 17.Ra2 0-0–+) 16...Be6 (16...a5 17.b5–+) 17.d5–/+ Bd7 18.b5 (18.a5 Nc8–/+) 18...ab5 (better 18...Bg7 19.Bb2 0-0–+) 19.cb5? (better 19.Bb2 Bg7 20.ab5 Ra1 21.Ba1–/+) 19...Ra4–+ (19...Nfd5?! 20.Bb2 Rh7 21.a5–+; worse 19...Nbd5 20.a5–+; 19...Na4?! 20.Nc3 Nb6 21.Ra8 Na8 22.Be3–+) 20.Ra4 Na4 21.0-0 (21.Be3 Nd5 22.Bd4 Rh7–+) 21...Nd5 22.Na3 (22.Bc4 Ndb6 23.Be2 Bg7–+) 22...Ndb6 (22...Ndc3 23.Bd1–+) 23.Bd2 (23.Be3 Bg7–+) 23...Kd8 (23...Bg7 24.Kf2–+) 24.Rb1 (24.Ng5 Bg5 25.hg5 Re8–+) 24...Bg7 25.Ng5 Ke7 26.Ba5 (26.Kf2 Ra8–+) 26...d5 (26...Ra8 27.Bd2–+) 27.Kf1 (27.Bb4 Ke8–+) 27...d4 (27...Ra8 28.Bb4 Ke8 29.Re1–+) 28.Bb6 (28.Nc4 Nd5 29.b6 cb6 30.Bb4 Nb4 31.Rb4 Rc8–+) 28...Nb6 29.Bc4 (29.Ke1–+) 29...Ra8 30.Rb3 Ra3! 31.Ra3 Nc4 (31...Nc4 32.Ra8 Bb5–+) 0–1. Ghost_I_be – jaddwarrior (1785), ChessWorld.net, 2013.

3.e3 Bd7 4.Bb2= Nf6 5.Be2 a5 (5...Be7 6.Nc3=) 6.b5 Be7 7.c4 b6 (7...Bf5 8.d4=) 8.Nc3 (8.d4 e4=) 8...0-0 9.Nf3 Bf5 (9...c6 10.0-0+=) 10.0-0 (10.d4 Nbd7+=) 10...Nbd7 11.d4 ed4 (11...h6!?+=) 12.Nd4+/– Bg6 (12...Be6 13.Nc6 Qe8 14.Nd5 Bd5 15.cd5+/–) 13.f4 h6 (13...Be4!?+/–) 14.Bf3+- Rc8 (14...Re8 15.f5 Bh7 16.Ba8 Qa8 17.Nc6+-) 15.Bb7 Bh5 (15...Nc5 16.Nc6 Qd7 17.Bc8 Rc8 18.f5+-) 16.Qc2 Rb8 17.Nc6 Qe8 18.Nb8 Qb8 19.Bc6 Nc5 (19...Qd8 20.e4+-) 20.e4 Nb3?? (20...Qd8+-) 21.Qb3 (21...Qd8 22.Rae1+-) 1–0. Fritz,Harry – Icic, corr SOK–98–130, 2000.

3.e3 h6 4.c4 f6 (4...Nf6 5.d4=) 5.Bb2 (5.Qh5 Kd7+=) 5...b6 (5...Ne7 6.d4=) 6.Nf3 (6.Qh5 Kd7+/–) 6...g5 (6...a5 7.b5+=) 7.d4+/– h5 (7...g4 8.Nh4 Ne7 9.Bd3+/–) 8.Nbd2 (8.Bd3 Ne7+/–) 8...g4 9.Nh4 f5 (9...ed4 10.ed4 Bh6 11.Ng6+/–) 10.g3 (10.Ng6 Rh6 11.Nf8 Qe7+-) 10...f4 (10...Bb7!? 11.f3 Qg5+/–) 11.de5 de5 (11...fe3 12.fe3 Rh6 13.Ne4 de5 14.Qd8 Kd8 15.Rd1 Ke8 16.Bg2+-) 12.ef4 Nd7 (12...Bb7 13.Bg2 Bg2 14.Ng2+-) 13.fe5 (better is 13.Bg2 Rb8 14.0-0+-) 13...Ne5?? (13...Bb7 14.e6 Ndf6+-) 14.Be5 Rh6 (14...Bb7 15.Bg2 Bg2 16.Ng2+- (16.Bh8?! Bh1 17.Qa4 Qd7 18.Qd7 Kd7+/–)) 15.Qe2 (15.Bg2 c6+-) 15...Ne7 (15...Bb7 16.Bg2 Bg2 17.Ng2+-) 16.Bg2 a5 (16...Rb8+-) 17.Ba8 a4 (17...Re6 18.Rd1 ab4 19.Nb3+-) 18.Rd1 Ng8 19.Bc7 Be7 20.Bd8 Kd8 21.Ne4 Ke8 22.c5 (22.Nd6 Rd6 23.Rd6 Bd7+-) 22...b5 23.Nd6 Kd8 24.Nf7 Ke8 (25.Nh6 Nh6 26.Bc6 Kf8 27.Ng6 Kg7 28.Qe7 Nf7 29.Rd6 Be6 30.Qf8 Kf6 31.Re6 Kg5 32.Nh4 Ne5 33.Re5) 1–0. mgriffin (1870) – borodin, net–chess.com, 2001.

3.e4 a5 4.b5 Nd7 (4...Nf6 5.Nc3 Be7 6.Nf3 Bg4 7.Be2 0-0=; 4...Be7 5.Nc3 Nf6 6.Nf3 0-0 7.d4 Nbd7=; 4...Be6 5.Nf3 Nf6 6.Nc3 Be7 7.d4 Nbd7=; 4...d5 5.ed5 Qd5 6.Bb2 Nf6 7.Qe2 Bd6=) 5.Nc3 Ngf6 6.Nf3 Nc5 7.d4 Nfe4=.

3.e4 c6 4.Nf3 h6 5.Bc4 Nf6 6.Nc3 Be7 7.0-0 b5 8.Bb3 a5 9.Re1 (better is 9.ba5!? Qa5 10.Bb2=) 9...ab4–/+ 10.Ne2 (10.Nb1 0-0–/+) 10...ba3 (10...Ne4 11.d4–+) 11.Ba3–/+ c5 12.d3 Nc6 Black intends b4 13.Ng3 b4 14.Bb2 Bb7 (14...Ra1 15.Ba1 0-0 16.c3–/+) 15.Nf5 0-0 16.c3 Rb8 17.c4 (17.cb4 Nb4 (17...cb4?! 18.d4+=) 18.N3h4 Kh8+=) 17...Nd4 (better is 17...Bc8!?–/+) 18.N3d4 cd4 19.Qf3 Nh7 (19...Ne8 20.Qg4 Bg5 21.h4+=) 20.Bc1 (20.Qg3!? Bg5 21.h4+=) 20...Bf6 21.Re2 Bg5 22.Bg5 Ng5 (worse is 22...Qg5 23.Nd6 Nf6 24.c5+=) 23.Qg3 Kh7 (23...Qf6 24.Rea2–/+) 24.Ra4 (24.c5 dc5 25.Qe5 Qf6 26.Qc5 Rfc8+=) 24...Bc6 (better is 24...g6!? 25.Nh4 Ne6–+) 25.Ra6+= Qc7 26.Rea2 g6 27.Nh4 (27.Nh6 Ne4 28.Qh3 Kg7=) 27...Be8 (27...Ra8 28.f4 Ra6 29.Ra6–/+) 28.Re2? (28.Ra7 Rb7 29.Rb7 Qb7=) 28...Qb7 (28...Ne6!? 29.Ra1 Nc5–/+) 29.Ra5 (29.Rd6!? Ra8 30.f4 Ra1 31.Re1 ef4 32.Qf2+=) 29...Ra8 30.Ra8 Qa8 31.h3?? (31.Ra2 Qd8+=) 31...f5?? (better is 31...Qa3 32.Bc2 b3 33.Bb3 Qb3–+) 32.ef5 gf5 33.Nf3?? (better is 33.Ra2 Qb8 34.Nf3–/+) 33...Rg8 (better is 33...Nf3 34.Qf3 Bc6 35.Ra2 Bf3 36.Ra8 Ba8 37.Kf1–+) 34.c5 (34.Ng5 Rg5 35.Ra2 Qa2 36.Ba2 Rg3 37.fg3–+) 34...Rg6 (better is 34...Nf7 35.Qg8 Kg8 36.cd6 e4 37.de4 fe4–+) 35.cd6?? (35.Nh4 Rg7 36.cd6–+) 35...Nf3–+ 36.Qf3 (36.gf3 Rg3 37.fg3 Qf3 38.Rf2 Qg3 39.Rg2 Qe3 40.Kh2–+) 36...Qf3 37.g3 Qe2 0–1. pieeater – neilo, ChessWorld.net, 2012.

3.e4 Bd7 4.Bc4 (4.Nf3 Nf6 5.Nc3 Nc6=) 4...Qf6 (4...b5 5.Bb3=) 5.Bb2 (5.Nc3 c6=) 5...Bc6 (5...Qg6 6.Qf3=) 6.d3 (6.Nc3 Qg6=) 6...Nh6 (6...Qg6 7.Nf3+=) 7.Nf3 (7.Nc3 a6+=) 7...Be7 (7...Bd7 8.d4+=) 8.Nc3 Nd7?? (8...a6+=) 9.Ne2?? (9.b5!? Be4 10.de4 Qg6+-) 9...Ng4?? (9...Nb6 10.Bb3=) 10.Ng3?? Qg6?? 11.Nf5?? Bf6?? 12.Ng3?? b5 13.Bb3 0-0 14.Rc1 Rac8 15.c4 a6 16.cb5+/– Bb7 17.ba6 Ba6 18.a4 c6 19.a5 c5 20.Ba4 Nb8 21.b5+- Bb7 22.Qe2 Nh6 23.b6 Na6 24.0-0 Nb4 25.Ba3 Nc6 26.Bb5 Na5+= 27.Bb2 Nb3 28.Rc3 Nd4= 29.Nd4 ed4 30.Ra3 Ra8 31.Ra8 Ra8= 32.Ra1 Ra1 33.Ba1 Ng4 34.Nf5 Qh5?? 35.h3+- Ne5 36.Qh5 g6 37.Qh6 gf5 38.Qf6 fe4 39.Qd6 Nd3 40.Bd3 ed3 41.Qb8 (41...Kg7 42.Qe5 Kg6 43.Qc5 Ba8 44.Qd4 f5 45.Qg7 Kh5 46.Bf6 Bg2 47.Qh7#) 1–0. orangechess – Chessqueen, internet, 2007.

3.e4 Nd7 A) 4.Nf3 a6 5.d4 Ngf6 6.Bd3 ed4 7.Nd4 c5=; B) 4.Bb2 a6 5.d4 Ngf6 6.Bd3 ed4 7.Bd4 c5=; C) 4.Bc4 a5 5.ba5 Ra5 6.d3 Ngf6 7.Nf3 c6=; D) 4.Nc3 a5 5.b5 Ngf6 6.Nf3 Nc5 7.d4 Nfe4=.

3.e4 Be6 4.Nf3 Nf6 (4...Be7 5.d4 a5 6.b5 Nf6 7.Bd3 Nbd7=; 4...Nc6 5.Bb5 a6 6.Bc6 bc6 7.d4 Nf6+=; 4...a5 5.b5 Nf6 6.Nc3 Be7 7.d4 Nbd7=; 4...Nd7 5.d4 Ngf6 6.Bd3 Bg4 7.c3 d5=; 4...Qe7 5.Nc3 Nf6 6.d4 ed4 7.Nd4 d5+=) 5.Ng5 Be7 6.Ne6 fe6 7.d3 0-0=.

3.g3 Be7 4.Bg2 Nf6 5.Nf3 Bg4 (5...a5 6.Bb2=+) 6.h3 Bf3 7.Bf3 Nc6 8.b5 Nd4 9.Bb7 Rb8 10.Bg2 Nb5 (10...Rb5? 11.e3 0-0 12.c4+-) 11.c4 Nd4 12.Nc3 0-0 13.0-0 Nb3 (13...Qd7 14.e3 Nb3 15.Rb1 Nc1 16.Qc1=) 14.Rb1+= Nc1 15.Qc1 Rb1 (15...Qd7 16.Qc2+=) 16.Qb1+= g6 (16...d5 17.Nd5 Nd5 18.Bd5 Ba3 19.Qf5+=) 17.f4 (17.Qb7!?+/–) 17...ef4 18.Rf4 Nh5 19.Rf3 Bg5 (19...Bf6 20.Nd5 Be5 21.g4+=) 20.e3+/– Nf6 21.Qb5 Ne4?? (better is 21...Nd7+/–) 22.Ne4+- Be7 23.Qd5 Qd7 24.c5 c6 25.Qd3 d5 26.Rf6 Bf6?? 27.Nf6+- Kg7 28.Nd7 Rg8 29.Qd4 Kh6 30.Qh4 Kg7 31.Qf6 Kh6 32.Ne5 Rg7 33.Qh4# 1–0. mrkt – like_chess, kurnik, 2007.

3.h3 b5 4.Nc3 (4.e4 c6=) 4...a6 (4...a5 5.ba5 (5.Nb5? ab4 6.Rb1 c6–+) 5...c6 6.Nf3=+) 5.e4 (5.Nf3 c6=) 5...Bb7 (5...Nf6 6.Nf3=) 6.d3 (6.Nf3 Nf6 7.d3 Nbd7=) 6...g6 (6...Nf6 7.Nf3=) 7.Qf3 (7.Nf3 f5+=) 7...Qf6 (7...f5 8.Be2=) 8.Qf6 (8.Nd5 Qd8+=) 8...Nf6= 9.Nf3 Nc6 (9...Bg7 10.g4=) 10.Bg5 (10.Be3 0-0-0+=) 10...Be7 11.Bf6 (11.Be3 0-0-0=) 11...Bf6 12.Nd5 Bd8 13.c4 (13.Be2 a5 14.c4 Nd4 15.Nd4 ed4 16.ba5 c6=) 13...Nd4 14.Nd4 Bd5 (14...ed4 15.Be2+=) 15.cd5 (15.Nb5 Be6 16.Nc3 c6+=) 15...ed4 16.g3 (16.Be2 Bg5+=) 16...h5 (16...a5 17.Rb1=) 17.Be2 (17.Bg2 a5 18.Kd2 h4+=) 17...h4 (17...a5 18.Kd2+=) 18.Bg4 g5 (18...a5 19.Ke2+=) 19.Bf5 (19.Ke2 hg3 20.fg3 Bf6+/–) 19...f6 (19...a5 20.Ke2+=) 20.Rc1 (20.Ke2!?+/–) 20...a5+= 21.ba5 Ra5 22.Ra1 b4 23.0-0 b3?? 24.Rfb1+- Rb5 25.Kg2 b2? 26.Ra2+- hg3 27.fg3 Rb3 28.Rbb2 Rd3 29.Rb8 Ke7 30.a4 Rd1 31.a5 d3 32.a6 d2 33.a7 Rc1 34.Rd2 c6 35.a8Q Re8 36.dc6 Kf7 37.Rd8 Rd8 38.Qd8 Rc6 39.Qd7 (39...Kf8 40.Qc6 g4 41.Qd6 Kg8 42.Qd8 Kg7 43.h4 Kh6 44.Qh8) 1–0. valerypavlovich (2120) – sbderkach (1680), net–chess.com, 2006.

3.h3 Nc6 4.Nc3 (4.e4 Nf6 (4...Be7 5.Bc4 Nf6 6.d3 d5 7.ed5 Nd5=; 4...f5 5.ef5 Bf5 6.Bb5 Nf6 7.d4 ed4=; 4...Be6 5.Nf3 Qf6 6.d3 h6 7.c4 Nge7=) 5.Nc3 Be7 6.Bc4 0-0 7.Nf3 Nd4=; 4.b5 Nd4 (4...Nce7 5.d4 ed4 6.Nf3 a6 7.ba6 ba6=) 5.e3 Ne6 6.d4 e4 7.d5 Nc5=) 4...Be6 (4...d5 5.e4 de4 6.Ne4=+ Nf6 7.Bd3 Bf5=+; 4...Nf6 5.e4 Be7 6.Bb5 Bd7 7.Nf3 a6=; 4...Be7 5.e4 Nf6 6.Be2 0-0 7.Nf3 a5=+; 4...f5 5.e3 Nf6 6.d4 e4 7.d5 Ne5=) 5.b5 (5.e4 Nd4 (5...Be7= 6.Nf3 Nf6 7.Bb5 Qd7=) 6.Nce2 Ne2 7.Qe2 Qe7=) 5...Nd4 6.e3 Nf5 7.Nf3 Nf6 8.Bb2 Be7?? (better is 8...Qd7=) 9.g4+- Ne3 10.de3 d5? (better is 10...0-0+-) 11.Ne5 0-0 12.Qd4 a6 13.g5 Nh5 (13...Ne8 14.ba6 c5 15.Qd2+-) 14.Be2 (14.ba6 ba6 15.Nc6 Qe8 16.Ne7 Qe7 17.Nd5 Bd5 18.Qd5 Nf4+-) 14...g6 (14...Bd6 15.Rg1 (< 15.Bh5 Qg5 16.Nf7 Bf7+-) 15...f6 16.Nd3+- (16.Bh5?! Be5 17.Qd3 fg5+-)) 15.Nd3 Bg5 (15...f6 16.Bh5 gh5 17.Nf4+-) 16.Ne4! Bh6 (16...de4 17.Qh8) 17.Qh8 1–0. pierre – kartal12, internet, 2008.

3.h3 d5 4.Bb2 (4.d4 ed4 (4...Bd6 5.Nc3 Nf6 6.Nb5 0-0 7.Nf3 Nc6=+; 4...Nc6 5.e3 e4 6.c4 Nf6 7.Qc2 Be6=) 5.Nf3 Nf6 6.Nd4 Ne4 7.e3 a5=+; 4.Nf3 Bd6 (4...Nd7 5.Bb2 e4 6.Nd4 a5 7.e3 Ngf6=+; 4...e4 5.Nd4 a5 6.b5 c5 7.bc6 Nc6=+) 5.Bb2 Nd7 6.Nc3 c6 7.e3 Ngf6=+) 4...Bd6 (4...Nd7 5.Nf3 Bd6 6.Nc3 c6 7.e3 Ngf6=+; 4...e4 5.d3 e3 6.fe3 Nf6 7.g4 Bd6=) 5.Nf3 Nd7 6.Nc3 c6 7.e3 Ngf6 =+.

3.h3 Be6 4.Nf3 (4.Nc3 d5 (4...a5 5.b5 d5 6.e3 Nf6 7.Nf3 Bd6=+; 4...Nf6 5.Nf3 Be7 6.e4 a5 7.b5 0-0=) 5.Nf3 d4 6.Ne4 a5 7.b5 Qd5=+; 4.d4 ed4 5.Nf3 c5 6.e3 de3 7.Be3 Nc6=+; 4.e4 Nf6 (4...a5 5.b5 Nf6 6.Nc3 d5 7.ed5 Nd5=) 5.Nc3 a5 6.b5 d5 7.ed5 Nd5=) 4...a5 (4...Nf6 5.Nc3 Be7 6.e4 Nc6 7.Bb5 Qd7=) 5.b5 Nf6 6.Nc3 Nbd7 7.e4 Nc5=.

3.h3 Be7 4.e4 (4.Nc3 d5 (4...a5 5.b5 d5 6.e4 de4 7.Ne4 Nf6=+; 4...Nf6 5.e4 0-0 6.Nf3 Nbd7 7.d4 ed4=; 4...f5 5.e3 Nf6 6.d4 e4 7.d5 a5=; 4...Be6 5.e4 Nf6 6.Nf3 a5 7.b5 0-0=; 4...Nc6 5.e4 Nf6 6.Bc4 0-0 7.Nf3 Be6=) 5.e3 Nf6 6.Nf3 Nbd7 7.Be2 0-0=+; 4.Nf3 Nf6 (4...e4 5.Nd4 Nf6 6.d3 0-0 7.de4 c5=+) 5.d4 e4 6.Nh2 0-0 7.d5 c6–/+; 4.e3 Nf6 (4...a5 5.b5 Nf6 6.Nf3 c6 7.Bb2 0-0=+; 4...Be6 5.d4 Nd7 6.d5 Bf5 7.Nf3 a5=) 5.Bb2 0-0 6.Be2 a5 7.b5 e4=+; 4.d3 Nc6 (4...Nf6 5.Nf3 Nbd7 6.e4 0-0 7.Nc3 a5=; 4...Be6 5.e4 Nf6 6.Nf3 0-0 7.Nc3 a5=+; 4...a5 5.b5 Nd7 6.e4 Ngf6 7.Nc3 c6=; 4...Nd7 5.e4 Ngf6 6.Nf3 0-0 7.Nc3 a5=; 4...f5 5.g3 Nf6 6.Bg2 0-0 7.Nf3 e4=+) 5.Nf3 Nf6 6.b5 Nb8 7.e4 0-0=+; 4.Bb2 Nf6 (4...Be6 5.e4 Nf6 6.Nc3 0-0 7.Nf3 Nc6=+; 4...Bf5 5.d4 ed4 6.Bd4 Nf6 7.e3 0-0=+; 4...a5 5.d4 ed4 6.Bd4 Nf6 7.b5 0-0=+) 5.Nc3 Be6 6.e4 0-0 7.Nf3 a5=+) 4...a5 (4...Nf6 5.Nc3 Nbd7 6.Nf3 0-0 7.d4 a5=+; 4...Nd7 5.Nc3 Ngf6 6.Nf3 a5 7.b5 0-0=; 4...Nc6 5.Bc4 Nf6 6.d3 d5 7.ed5 Nd5=; 4...Bd7 5.Nf3 Nf6 6.Nc3 0-0 7.Be2 Nc6=) 5.b5 Nf6 6.Nc3 0-0 7.Nf3 d5 =+.

3.h3 Bf5 4.d3 (4.Nf3 Nd7 (4...Nc6 5.b5 Nd4 6.Nd4 ed4 7.Bb2 Qh4=; 4...Be7 5.d3 Nf6 6.e4 Be6 7.Nc3 Bd7=; 4...Nf6 5.d3 Be6 6.e4 Be7 7.Be2 0-0=; 4...a5 5.b5 Be7 6.Nc3 Nf6 7.d3 Be6=; 4...Qf6 5.Nc3 e4 6.Ng1 Nc6 7.Nd5 Qd8=) 5.d3 d5 6.g4 Bg6 7.Bg2 a5=+; 4.Nc3 d5 (4...Nf6 5.Nf3 Nc6 6.d3 e4 7.de4 Ne4=) 5.Nf3 d4 6.g4 Be6 7.Ne4 Bd5=+; 4.e3 Nf6 (4...Nd7 5.Bb2 Ngf6 6.Nf3 Be7 7.Be2 0-0=+; 4...d5 5.d4 ed4 6.ed4 a5 7.b5 Bd6=; 4...Nc6 5.d4 Nf6 6.Bb5 a6 7.Bc6 bc6=; 4...c6 5.Nf3 Nf6 6.d3 a5 7.ba5 Ra5=+) 5.d4 Nbd7 6.Bb2 a5 7.b5 Be7=+; 4.g4 Be4 (4...Be6 5.Bg2 c6 6.d3 a5 7.b5 h5=+) 5.Rh2 d5 6.Nc3 Bg6 7.d3 d4=+) 4...Nf6 (4...Be6 5.Nf3 Nf6 6.e4 Be7 7.Nc3 c5=; 4...Be7 5.e4 Be6 6.Nf3 Nf6 7.Be2 a5=; 4...d5 5.Nf3 Bd6 6.c4 e4 7.de4 Qf6=; 4...a5 5.e4 Be6 6.b5 Nf6 7.Nf3 Nbd7=; 4...Nc6 5.e4 Be6 6.Nf3 Nf6 7.b5 Ne7=) 5.Nf3 Be7 6.e4 Be6 7.Be2 0-0=.

3.h3 Nf6 4.d3 Be7 (4...a5 5.b5=+) 5.Nc3 0-0 (5...d5 6.Nf3 Nbd7 7.e3=+) 6.Nf3 Nc6 (6...c5 7.bc5 Qa5 8.cd6 Bd6 9.Qd2+=) 7.Bb2 (7.e4 Be6=+) 7...Be6 8.e4 b6 (8...Nd4 9.Ng5=+) 9.Qe2 (9.b5!? Nd4 10.Nd4 ed4 11.Ne2=) 9...d5 (better is 9...Nd4!? 10.Nd4 ed4–/+) 10.ed5= (10...Nd5 11.Nd5 Bd5 12.Ne5 (12.Be5?? Bf3 13.Qf3 Ne5–+) 12...Ne5 13.Be5=). valerypavlovich (2120) – scmorgan, net–chess.com, 2006.

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

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

3.Bb2 Be6 4.e3 f5 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 Be6).

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

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

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

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

3.Bb2 f5 4.d4 e4 5.e3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 Nf6 5.d4 e4).

3.Bb2 f5 4.e3 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3).

3.Bb2 f5 4.e3 Nf6 5.Nf3 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 Nf6 5.c4).

3.Bb2 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.Nf3 Nf6 5.Be2 Be7 6.a3).

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

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

3.Bb2 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 d6).

3.Bb2 Qf6 (--> 1.b4 e5 2.Bb2 Qf6 3.a3 d6).

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

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

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

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

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

3.Bb2 g6 4.e3 Bg7 5.Nf3 (---> 2.a3 g6 3.Bb2 Bg7 4.Nf3 d6 5.e3).

4.e4 Nd7 5.Nf3 Ngf6 6.d4 Be7 7.Bd3 0-0 8.0-0=.

4.e4 Be7 5.Nf3 f5 6.d4 Nf6 7.de5 Ne4 8.Bb2=.

4.e4 Nf6 5.Nf3 d5 6.ed5 e4 7.Qe2 cd5 8.d3=.

4.Nf3 Be7 5.d4 Bf6 6.de5+= de5 7.Qd8 Kd8 8.Ne4+/– Nd7 9.Bb2 Ne7 10.0-0-0 Kc7 11.e3 h6 12.Bc4 Rf8 13.Bb3 b5 14.Nd6 e4 15.Ne4+- Bb2 16.Kb2 f5 17.Nd6 g5 18.Rd4 Nd5 19.Nb5! cb5 20.Bd5 Rb8 21.c4 Nb6 22.cb5 Rd8 23.Rc1 Kd6 24.Be6! Ke7 25.Rc7 Ke6 26.Rd8 +-. pierre – diran, internet, 2008.

4.Nf3 f5 5.e3 Nf6 6.Be2 Be7 7.0-0 0-0 8.Bb2=.

4.Nf3 Bg4 5.h3 Bf3 6.ef3 Qf6 7.Be2 Be7 8.0-0 Qg6 9.d4 Bf6 10.Re1+/– Ne7 11.Bd3 Qh5 12.Ne4 Bh4?? 13.Nd6 Kd7 14.de5 Nd5 15.c4 Nc7 16.Bf5 Ne6 17.Bg4 Qg6 18.Nf7 Ke7 19.Nh8 Na6 20.Qd6 Ke8 21.Ng6 (21...Nac7 22.Be6 Ne6 23.Qe6 Kd8 24.Rd1 Kc7 25.Qd6 Kc8 26.Nh4 b5 27.Qc6 Kb8 28.Rd8#) 1–0. Fritz 11 – irrn, internet, 2009.

4.d4 e4 5.Nh3 Nf6 6.Bg5 Be7 7.e3 0-0 8.Bc4 d5 9.Nd5! Nd5 10.Be7 Qe7 11.Bd5 Kh8 12.Qh5 c6 13.Bb3 Nd7 14.Nf4 Rf6 15.Qg5 Nf8 16.d5 h6 17.Qg3 c5 18.bc5 Qc5 19.0-0 g5 20.Nh5 Rd6?? (better is 20...Rf7+-) 21.Qe5 Kg8 (21...Rf6 22.Qf6 Kg8 23.Qg7#) 22.Qg7# 1–0. usingprogram (2020) – qendra6, kurnik, 2012.

4.Nf3 Nf6 5.d3 Be7 6.g3 0-0 7.Bg2 a6 8.0-0 Nc6 9.e4 Kh8 10.Re1 fe4 11.de4 Bg4 0–1. Kazimierski,Tomasz – Lombart,Philippe (1915), SB–2010-0-00108, 2010.

4.d3 Be7 5.Nf3 0-0 6.g3 Ne8 7.Bg2 f5 8.0-0 Be6?? (better is 8...c6=) 9.Ng5!+- Bg5 10.Bg5 Qg5 (10...Qc8 11.Nd5 Bd5 12.Bd5 Kh8 13.Be7+/–) 11.Bb7 f4 12.Ba8 c6 13.b5 Bh3 14.bc6 (14.Re1!? Qf5 15.f3 Qg6+/–) 14...Bf1 15.Qf1 (15.Kf1?! fg3 16.hg3 Qg3=) 15...fg3 16.hg3 Nf6 (better is 16...Nc7!? 17.Bb7 Qe7+-) 17.Qh3 Ng4 (17...Qd2 18.Qe6 Kh8 19.Qd6+-) 18.c7 Nd7 (18...Na6 19.Bd5 Kh8 20.Bf3+-) 19.Bd5 Kh8 20.Bf3 Ndf6 (20...h5 21.Nb5 Kg8+-) 21.Rb1 e4 (21...Qf5+-) 22.Ne4 Ne4 (22...Nf2 23.Nf2 Qc5+-) 23.Rb8 (23.Rb8 Qe7 24.c8Q+-) 1–0. Fritz 11 – paramosha, 2014.

4.d3 Be7 5.f4 0-0 6.Nf3 ef4 7.Bf4 d5 8.Qd2 c5 9.Nb5 Na6 10.bc5 Bc5 11.e3 Bg4 12.Be2 Nh5 13.Be5 Re8 14.Bd4 Bd4 15.Nbd4 Qe7 16.Kf2 Nc5 17.Rae1 Nf6 18.Qc1 Rac8 19.Rd1 Nfd7 20.Rhf1 Nb6 21.h3 Bd7 22.Rde1 Kh8 23.Rg1 Rc7 24.Rgf1 a5 25.Rh1 Nca4 26.Nb3 Nc3 27.Na5 Na2 28.Qd2= Qa3 29.Ra1 Ra8 30.Nb3 Qe7 31.Nbd4 Ra6 32.Rhf1 Nc3 33.Kg1 Nba4 34.Rfe1 Ra7 35.Bf1 b5 36.Be2 b4 37.Rf1 Nb5 38.Nb5 Bb5 39.Nd4 Nc3 40.Nb5 Nb5 41.Bf3 Ra1 42.Ra1 Na3 43.Bd5+/– Kg8 44.Bb3 Rc8 45.Rf1 Rf8 46.Rf4 Nb1 47.Qb4 Qe3 48.Kh1 Qc1 49.Kh2 Qa3? 50.Qe1 Qd6 51.g3 g5 52.Rf5 Na3 53.Rg5 Kh8 54.Ra5 f6 55.Qc1 Qb6 56.Rf5 Re8 57.Qd1 Nb5 58.Qf1 Rf8 59.Qe1 Nd4 60.Qf2 Re8 61.Rf6 Re2 62.Qe2 Qf6 63.Qe8 Kg7 64.Kg1 Nb3 65.Qd7 Kh6 66.cb3 Qa1 67.Kf2 Qb2 68.Kf3 Qb3 69.Qd6 Kg7 70.Qe7 Kg6 71.Ke4 Qc2 72.Qd6 Kg5 73.Qe5 Kg6 74.Qf5 Kg7 75.Qe5?? Kg6 76.Qe6 Kg7 77.Qg4 Kh6 78.Qf4 Kg6 79.h4 Qe2 80.Qe3 Qg4 81.Ke5 Qf5 82.Kd6 Qf8 83.Kd5 Qd8 84.Kc4 Qc7 85.Kb3 Qb7 86.Kc3 Qc6 87.Kd2 Qg2 88.Ke1 Qh1 89.Kf2 Qh2 90.Kf3 Qh1 91.Kf4 Qf1 92.Qf3 Qc1 93.Ke4 Qc6 94.Ke3 Qb6 95.Ke2 Qb2 96.Kf1 Kg7 97.Qg4 Kf6 98.Qg5 Kf7 99.Qd5 Kf6 100.Qd6 Kg7 101.d4 Qc3 102.Qe5 Kf7 103.Qf5 Kg7 104.Qg5 Kf7 105.Qf4 Ke6 106.Qe4 Kf6 107.Kg2 Qb2 108.Kh3 Qb5 109.Qf3 Ke6 110.Qe3 Kd7 111.g4 Qb6 112.h5 h6 113.Qd3 Qe6 114.d5 Qf6 115.Qf5 Qf5 116.gf5 Ke7 117.Kg3 Kd7 118.Kf4 Kd6 119.f6 Kd5 120.f7 Kd6 121.f8Q Kd5 122.Qh6 Kc5 123.Qg5 Kd4 124.h6 Kc4 125.Qg8 Kc5 126.Qc8 Kd5 127.h7 Kd4 128.h8Q Kd3 129.Qcc3 Ke2 130.Qe3 Kd1 131.Qd3 Ke1 132.Qh4# 1–0. GLChess207e – ExChess251, computer chess game, 2000.

4.e4 Be7=.

4.Qc2 Bb7 5.Nc3 Nd7 6.Nf3 Ngf6 7.d3 g6 8.e3 Bg7 9.Be2 0-0 10.Bb2 Re8 11.0-0 c5 12.b5 Rb8 13.Nd2+= a6 14.ba6 Ba6 15.Nb5 Bb5= 16.cb5 d5 17.e4 d4 18.Nc4+/– Rf8 19.f4 ½–½. Carstensen,Jan Christian (1655) – Diser,Vitali, Schleswig Holstein–ch U18, 2001.

4.Nc3 Bb7 5.d4 ed4 6.Qd4 Nc6 7.Qf4 Ne5 8.Nf3 f6 9.g3 Bf3 10.ef3= Qe7 11.Be2?? g5 12.Qf5 Nh6+= 13.Qe4 Rb8 14.0-0 c5 15.f4 gf4 16.Bf4 Rc8 17.Nd5 Qe6 18.Bh6 Bh6?? 19.Bh5 Kd7 20.Rae1 f5 21.Qh4 cb4 22.ab4?? Rc4–/+ 23.Qf6 Qf6 24.Nf6 (24...Ke6 25.Ne8–/+). losertoo (1860) – sbderkach (1680), net–chess.com, 2006.

4.e3 a5 5.b5 =+.

4.e3 f5 5.Bb2 Be7 6.Nf3 Nd7 7.d4 Bf6 8.de5 Ne5 9.Ne5 de5 10.Qc2 Qe7 11.Be2 Nh6 12.Nd2 0-0 13.0-0 Rad8 14.Rfd1 g5 15.b5 g4 16.a4 Qg7 17.Nb3 Rd1 18.Rd1 b6 ½–½. Bender,Wolfgang – Hesidenz,Gerd, SEM Meister qual1, 2004.

4.e3 g6 5.Bb2 Bg7 6.Nf3 Ne7 7.d4 Nd7 8.Nc3 0-0= 9.Be2 ed4 10.Nd4 Ne5 11.Ne6 fe6 12.0-0 Nf5= 13.Qd2 Qh4 14.f4 Ng4 15.Bg4 Qg4 16.Nd1 Bb2 17.Qb2 Qh4 18.Rc1 Qf6 19.Qe2 Rae8 20.Nf2 Qg7 21.c5 e5 22.cd6 cd6 23.fe5 Qe5 24.e4 d5 25.Qa2 Ne3 26.Rfe1 Nc4 27.Rcd1 Ne3?? 28.Rd3 Qf4?? 29.ed5 Ng4 30.d6+- Rf7?? 31.Qf7 Qf7 32.Ng4 Qf4 33.Red1 Qg4–+ 34.d7 Rd8 35.R1d2 Qe4 36.g3 Qe1 37.Kg2 Rf8 38.Rd1 Qf2 39.Kh3 Rd8 40.R3d2 Qf5 41.Kg2 Qe4 42.Kf2 Rf8 43.Kg1 Qe3 44.Kg2 Qe4?? 45.Kg1= Qe3 46.Kg2 Qe4?? (better is 46...Rd8 47.Rd3 Qe2 48.Kg1 Kf8–+) ½–½. Welling,Gerard (2400) – Hunt,Adam (2170), Isle of Man op, 1993.

4.e4 Nf6 5.Nc3 Nc6 6.d3 Qd7 7.Be2 Nd4 8.Bg5 Be7 9.Nf3 Ne2 10.Qe2 h6 11.Be3 c5 12.bc5+= dc5 13.Ne5 Qc7 14.f4 Qa5 15.f5?? Bc4 16.0-0=+ Ba6 17.Bd2 Qb6 18.Rab1 Qc7 19.Bf4 Qa5 20.Bd2 Qc7 21.Nd5?? Qe5–+ 22.Bf4 Qd4 23.Be3 Qa4 24.Nc7 Kd7 25.Na8 Ra8 26.Rfc1 b6 27.Qa2? Ke8 28.Rd1 Ng4 29.Bf4 Rd8 30.Re1 Bd3 31.Rbc1 Qd4 32.Kh1 Nf2 33.Kg1 Ne4 34.Kh1 Nf2 35.Kg1 Nh3 36.Kh1 Nf4 37.Rcd1 c4 38.a4 Qc5 39.Qa1 f6 40.Qc1 Ng2 41.Kg2 Qf5 42.Qe3 Qg4 43.Kh1 Rd7 44.Rd2 Be4! 45.Qe4 Qe4 46.Re4 Rd2 47.Rc4 Bd6 48.Rg4 Kf7 49.a5 b5 50.h4 b4 (51.Kg1 b3–+) 0–1. coolerdude – unitedfan, ChessWorld.net, 2005.

4.Bb2 f5 5.Qc2 Nf6 6.d3 Nbd7 7.Nd2 Nf8 (7...0-0 8.d4=+) 8.g3 c6 9.Bg2 Ne6 10.Nh3 0-0 11.e3 Bd7 (12.0-0 a5=). kosta – yumiko22 (1720), internet, 2007.

4.Bb2 Nf6 5.Nf3=+.

4.h4 Nf6 5.Bb2 0-0 6.h5 h6 7.e3 Nbd7 8.Nc3 Nb6 9.Qb3 Re8 10.Bd3 Be6 11.Nf3 Bg4 12.Ne4 Qd7 13.b5 Qe6 14.a4 c6 15.Ng3 cb5 16.ab5 Rec8 17.Rc1 Nfd7 18.Be2 Nc5 19.Qc2 Nca4 20.Ba1 d5 21.Ne5 Be2 22.Ke2 Ba3 23.Rb1 dc4 24.Nf5 c3 25.d4 Nb2 26.Rh4 Bf8 27.Rg4 a5 28.Qe4 Rcb8 29.Bb2 cb2 30.Rb2 a4 31.Rd2 a3 32.Qf3 Kh7 33.Qe4 Kg8 34.Qf3 Kh7 35.Qe4 Kg8 36.Qf3 Kh7 37.Qe4 Kg8 38.Qf3 Kh7 39.Qe4 Kg8 40.Rd1 a2 41.Ra1 Re8 42.f4 Kh8 43.Nh6 gh6 44.Qb7 Re7 45.Qc6 Qc6 46.bc6 Nd5 47.Kd2 Ra4 48.Ke2 Nc3 49.Kd3 Nd5 50.e4 Ra3 51.Kd2 Nf6 52.Rh4 Ne4 53.Ke2 Nc3 54.Kd2 Nd5 55.f5 Rea7 56.Rh3 Bb4 57.Kc2 Ne3 58.Re3 Re3 59.Nd3 Bd6 0-1. Davss (2245) - Andrei1987 (2225), Rated Classical game, lichess.org, 2014. (=1.c4 e5 2.a3 d6 3.b4)

4.Bb2 Nf6 5.Nc3 g6 (5...Be7 6.d4=) 6.e3 Bg7 7.Nf3 (7.d4 ed4 8.Qd4 0-0=) 7...0-0 (7...Nbd7 8.d4=) 8.Be2 (8.d4 e4 9.Ng5 h6=) 8...c6 (8...e4 9.Nd4=+) 9.Rc1 (9.d4 e4 10.Nd2 Be6=) 9...Kh8 (9...a5 10.c5=+) 10.0-0= Be6 (10...e4 11.Nd4=) 11.Na4 (11.d4 Nbd7+=) 11...Bg8 (11...h6 12.d4 e4 13.Nd2=) 12.c5 (12.d4 e4 13.Nd2 Nbd7=) 12...e4 (12...b5 13.cb6 ab6 14.Qc2=+) 13.Nd4= d5 (13...Qe7 14.d3=) 14.Nc3 (14.f3 Nbd7+=) 14...Nbd7 15.h3 (15.f4 Qc7=) 15...Ne5 16.f4 (16.Rb1 Nc4=+) 16...ef3=+ 17.Nf3 Nf3 18.Bf3 (< 18.gf3 d4 19.ed4 Nh5–+; < 18.Rf3 d4 19.ed4 Qd4 20.Kh1 Rad8=+) 18...Qe7 (18...d4 19.Ne2 d3 20.Nd4=) 19.Qc2 Rae8 20.Ne2 Be6 21.Nf4 Bc8 (21...Bf7 22.Bd4+=) 22.a4 (22.b5 Qd7+=) 22...Nd7 (22...g5 23.Nh5=) 23.Bg7 Qg7 24.b5 Ne5 (24...g5 25.Nh5 Qe7 26.Ng3+=) 25.Be2 Kg8 26.Qc3 Qh6 27.Nd3 (27.Rce1 g5 28.Nh5 Nc4+=) 27...Nd3= 28.Bd3 g5 (28...f4 29.ef4 Rf4 30.Rf4 Qf4 31.Rf1+=) 29.Rf2 (29.Rce1 g4+=) 29...Qg7 (29...f4 30.ef4 Rf4 31.Rcf1=) 30.Qg7 Kg7 31.Rcf1 d4 32.ed4 f4 33.Re2 (33.h4!? h6 34.Be2+=) 33...Re2= 34.Be2 Rd8 35.bc6 bc6 36.Bf3 Rd4 37.Bc6 Rc4 38.d4 Rd4 39.Rc1 Kf6 40.Kf2 h6 41.Kf3 Rd3 42.Ke2 Re3 43.Kd2 (43.Kf1 Ke5=) 43...Ke7 (43...Ke5 44.Ba8=) 44.Rc3 Rc3 45.Kc3 Kd8 (45...Bd7 46.Bb5=) 46.Kd4 (46.a5 Kc7 47.Bf3 Bd7+=) 46...Kc7 47.Bf3 Bb7?? (better is 47...a5 48.c6 Kd6=) 48.Bb7+- Kb7 49.Ke5 h5 (49...Kc6 50.Kf5 Kc5+-) 50.Kf5 g4 (50...Kc6 51.Kg5 Kc5 52.Kh5+-) 51.hg4 f3 (51...hg4 52.Kg4 f3 53.Kf3+-) 52.gf3 h4 (52...hg4 53.fg4 Kc6 54.g5+-) 53.Kf4 1–0. Bender,Wolfgang (1775) – Klein,Joerg (1980), 1.Saarlouis op, 1998.

4.Bb2 Nf6 5.e3 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 Nf6 5.c4).

4.e3 g6 (4...Nf6 5.Nc3=) 5.Bb2 (5.Nc3=) 5...h5 (5...Nf6!?=) 6.Nf3 (6.Nc3 Bg7+=) 6...Be7 (6...Nf6 7.Nc3+/–) 7.Nc3 b6 (7...Nf6 8.Be2+/–) 8.Nd5 (8.c5+-) 8...a5? (better is 8...Nf6+/–) 9.Ne5!+- de5 10.Be5 Bf6 11.Nc7 Kd7 (11...Kf7 12.Bf6 Nf6 13.Na8 Bb7 14.Nb6 Qb6+-) 12.Bf6 Nf6 13.Na8 Bb7 14.Nb6! Qb6 15.c5 Qc7 16.d4 Qc6 17.b5 (17...Qe6 18.Qa4+-) 1–0. Wall – Turboflax, internet, 1998.

4.g3 Bd7 A) 5.b5 A1) 5...Nf6 6.Nc3 (6.Bg2 e4 7.Nc3 Be6 8.d3 d5 9.Nh3 dc4 10.Nf4 Bf7 11.de4; 6.Nh3 Be7 7.Bg2 c6 8.Nc3 0-0 9.0-0 Ne4 10.Qc2 Qc8 11.Bb2) 6...Be6 7.Nf3 Nbd7 8.d3 Nc5 9.Bg2 Be7 10.0-0 0-0 11.Be3 ; A2) 5...e4 6.Bg2 (6.Nc3 Be6 7.d3 Nf6 8.Nh3 Nbd7 9.Nf4 Bf7 10.de4 fe4 11.Bg2; 6.Nh3 Be6 7.Nf4 Bc4 8.Nc3 Nf6 9.d3 Bf7 10.de4 fe4 11.Bh3) 6...Nf6 7.Nc3 Be7 8.Nh3 0-0 9.0-0 Ng4 10.Nf4 Bf6 11.Qb3; A3) 5...Be7 6.Nc3 (6.Bg2 c6 7.Nc3 Nf6 8.Nf3 0-0 9.d3 Qc8 10.0-0 cb5 11.Nb5) 6...Nf6 7.Bg2 c6 8.Nf3 0-0 9.0-0 e4 10.Nd4 Qb6 11.e3; A4) 5...a6 6.Nc3 Nf6 7.Bg2 e4 8.Nh3 d5 9.cd5 ab5 10.Bb2 Na6 11.Nf4; A5) 5...Kf7 6.Bg2 (6.Nc3 a6 7.Bg2 c6 8.d3 Nf6 9.Nf3 ab5 10.cb5 h6 11.0-0; 6.Nh3 Nf6 7.Bg2 a6 8.d4 Ne4 9.de5 Be7 10.Qd5 Be6 11.Qb7; 6.d4 Nf6 7.de5 de5 8.Nf3 Bd6 9.c5 Bc5 10.Ne5 Kf8 11.Nc3 ; 6.d3 a6 7.Nf3 Nf6 8.Nc3 ab5 9.cb5 h6 10.Bg2 c6 11.0-0) 6...c6 7.Nc3 Nf6 8.d3 h6 9.Nf3 cb5 10.cb5 Be6 11.0-0; A6) 5...Be6 6.Bg2 (6.Nc3 Nd7 7.Bg2 Nc5 8.d3 Nf6 9.Nf3 Be7 10.0-0 0-0 11.Be3; 6.Nf3 Nf6 7.Qc2 Nbd7 8.Ng5 Qe7 9.Bg2 e4 10.0-0 Bg8 11.d4; 6.d3 Nd7 7.Bg2 Nc5 8.Nf3 Nf6 9.Nc3 Be7 10.0-0 0-0 11.Be3; 6.Nh3 Nd7 7.Nc3 Nc5 8.d3 Be7 9.Bg2 Nf6 10.Be3 0-0 11.0-0; 6.Qc2 Nd7 7.Nf3 a6 8.Bh3 Nh6 9.d4 ab5 10.cb5 Ng4 11.Nc3 ; 6.e3 Nd7 7.Nf3 Nh6 8.Nc3 Be7 9.Be2 0-0 10.0-0 a6 11.Bb2; 6.Bh3 Nd7 7.d3 Qf6 8.Nc3 Ne7 9.Qc2 g5 10.Bg2 Nc5 11.Nf3) 6...Nd7 7.Nc3 Nc5 8.d3 Nf6 9.Nf3 Be7 10.Be3 0-0 11.0-0; B) 5.d3 B1) 5...Nf6 6.Bg2 (6.Nc3 Be7 7.b5 Bc8 8.Nf3 Nbd7 9.Bg2 0-0 10.0-0 Nc5 11.Be3; 6.b5 a6 7.Nc3 ab5 8.cb5 d5 9.Qb3 d4 10.Nd5 Ra5 11.a4) 6...Nc6 7.Nc3 Be7 8.Nf3 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2; B2) 5...Bc6 6.Nf3 Bf3 7.ef3 Nc6 8.Nc3 Nf6 9.Bg2 Be7 10.0-0 0-0 11.f4; B3) 5...Be7 6.Bg2 (6.b5 Nf6 7.Bg2 c6 8.Nc3 Qc8 9.Nf3 cb5 10.Nb5 0-0 11.0-0; 6.Nc3 Nc6 7.Nf3 Nf6 8.Bg2 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2; 6.Nf3 Bf6 7.Ra2 Ne7 8.Qb3 Nbc6 9.b5 Na5 10.Qa4 b6 11.Bg5) 6...Qc8 7.Nc3 Nf6 8.Nf3 0-0 9.0-0 Nc6 10.b5 Nd4 11.Be3; B4) 5...a6 6.Nf3 (6.Nc3 Nc6 7.Nf3 Nf6 8.Bg2 Be7 9.0-0 0-0 10.Be3 Ng4 11.Bd2; 6.Bg2 Nc6 7.Nc3 Be7 8.Nf3 Nf6 9.0-0 0-0 10.Be3 Ng4 11.Bd2; 6.Be3 Nf6 7.Nc3 Nc6 8.Nf3 Be7 9.Bg2 Ng4 10.Bd2 0-0 11.0-0; 6.Bd2 Nc6 7.Nc3 Nf6 8.Nf3 Be7 9.Bg2 0-0 10.0-0 e4 11.de4) 6...Nf6 7.Nc3 Nc6 8.Bg2 Be7 9.0-0 0-0 10.Be3 Ng4 11.Bd2; B5) 5...Nh6 6.Nc3 (6.Nf3 Nc6 7.b5 Nd4 8.Bg2 c6 9.Nc3 Be7 10.0-0 0-0 11.Bh6; 6.b5 c6 7.Bg2 Qb6 8.Be3 Qa5 9.Qd2 Qd2 10.Bd2 a6 11.Nc3; 6.Bg2 Nc6 7.Nc3 Be7 8.Bd5 Bf6 9.b5 e4 10.Bb2 Ne7 11.de4) 6...Be7 7.b5 0-0 8.Bg2 c6 9.Nf3 cb5 10.Bh6 gh6 11.cb5; B6) 5...Nc6 6.Nc3 (6.Nf3 e4 7.de4 fe4 8.Ng5 Be7 9.Ne4 Nf6 10.Bg2 Ne4 11.Be4; 6.b5 Nd4 7.Bg2 Nf6 8.Nc3 Be7 9.Bb7 Rb8 10.Bg2 0-0 11.Nf3; 6.Bg2 Nf6 7.Nc3 Be7 8.Nf3 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2) 6...Nf6 7.Nf3 Be7 8.Bg2 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2; C) 5.d4 C1) 5...Nf6 6.b5 (6.de5 de5 7.Nc3 Nc6 8.b5 Na5 9.Nf3 Be6 10.Ne5 Qd1 11.Kd1; 6.Nf3 e4 7.Nh4 a5 8.b5 Be7 9.Nc3 0-0 10.Bg2 Nh5 11.Qb3; 6.Bg2 Nc6 7.d5 Ne7 8.Nc3 a5 9.b5 Ng6 10.Nf3 Be7 11.Ng5) 6...Ne4 7.f3 Nf6 8.Nc3 Be7 9.Nh3 c5 10.de5 de5 11.Bg5; C2) 5...e4 6.Nc3 (6.Nh3 Nc6 7.Nc3 Nf6 8.Bg2 Be7 9.Nf4 0-0 10.0-0 a6 11.Bb2; 6.Bg2 Nf6 7.Nc3 Be7 8.Nh3 0-0 9.Nf4 Nc6 10.0-0 a6 11.Bb2; 6.b5 Nf6 7.Nc3 Be7 8.Nh3 0-0 9.Bg2 c6 10.0-0 a6 11.Nf4) 6...Nf6 7.Nh3 Be7 8.Nf4 0-0 9.Bg2 Nc6 10.0-0 a6 11.Bb2; C3) 5...Nc6 6.d5 Nce7 7.Nc3 Nf6 8.Bg2 c6 9.Bg5 Kf7 10.Nh3 a5 11.0-0; C4) 5...ed4 6.Nf3 (6.Bg2 Nc6 7.Nf3 Nf6 8.Nd4 Kf7 9.Nc3 Nd4 10.Qd4 c6 11.0-0; 6.b5 c5 7.Bg2 a6 8.Qa4 Nf6 9.Nf3 Be7 10.0-0 Qb6 11.Bf4; 6.Bh3 Nf6 7.Nf3 c5 8.0-0 Nc6 9.e3 Ne4 10.ed4 Qf6 11.Re1) 6...c5 7.bc5 dc5 8.Nbd2 Nf6 9.Rb1 Bd6 10.Bh3 0-0 11.Rb7 ; D) 5.Bg2 D1) 5...e4 6.Nc3 (6.b5 Be6 7.Nc3 Nf6 8.d3 d5 9.cd5 Nd5 10.Bb2 a6 11.de4) 6...Nc6 7.d4 Nf6 8.Nh3 Be7 9.Nf4 0-0 10.0-0 a6 11.Bb2; D2) 5...Nc6 6.Nc3 (6.d3 Nf6 7.Nc3 Be7 8.Nf3 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2; 6.b5 Na5 7.d3 a6 8.Nc3 Nf6 9.Nf3 ab5 10.cb5 Be7 11.Qc2) 6...Nf6 7.d3 Be7 8.Nf3 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2; E) 5.Bb2 E1) 5...Be7 6.Bg2 Qc8 7.Nc3 Nf6 8.Nf3 0-0 9.0-0 e4 10.Nd4 Nc6 11.Nc6; E2) 5...e4 6.d3 (6.Bg2 Nc6 7.d3 Nf6 8.de4 fe4 9.Nc3 Bf5 10.Nh3 Ne5 11.Qd4; 6.Nc3 Nf6 7.d4 a5 8.b5 Be7 9.Nh3 0-0 10.Nf4 e3 11.fe3; 6.d4 Be7 7.Nh3 Nf6 8.Nc3 0-0 9.Nf4 c5 10.bc5 dc5 11.d5) 6...Nf6 7.Bg2 Nc6 8.de4 fe4 9.Nc3 Bf5 10.Nh3 Ne5 11.Qd4; E3) 5...Nc6 6.b5 (6.Nc3 e4 7.Nh3 Nf6 8.Bg2 Ne5 9.Qb3 c6 10.0-0 Be6 11.d3) 6...Nd4 7.Bg2 Nf6 8.Nc3 Kf7 9.e3 Ne6 10.Nge2 c6 11.0-0; E4) 5...Ne7 6.Bg2 (6.Nc3 Nbc6 7.b5 Na5 8.Qa4 c6 9.Nf3 a6 10.e4 ab5 11.cb5; 6.Nh3 Bc6 7.Rg1 Bd7 8.Nc3 Nbc6 9.b5 Nd4 10.Bg2 c6 11.e3) 6...e4 7.d3 Nbc6 8.de4 fe4 9.Be4 Bf5 10.Bf5 Nf5 11.e4; E5) 5...Nf6 6.Bg2 (6.Nc3 Be7 7.Nf3 0-0 8.d3 Nc6 9.Bg2 a6 10.0-0 Kh8 11.Nd5; 6.Nf3 e4 7.Nd4 Nc6 8.Nc6 Bc6 9.Bh3 g6 10.Bd4 Bg7 11.b5) 6...e4 7.Nc3 Nc6 8.d4 ed3 9.ed3 Be7 10.Nf3 0-0 11.0-0; F) 5.Nf3 F1) 5...Nf6 6.Nc3 (6.Bg2 e4 7.Nd4 c5 8.Nc2 Nc6 9.Nc3 Be7 10.0-0 Be6 11.Ne3; 6.d3 e4 7.Nh4 Nc6 8.Nc3 ed3 9.Qd3 Ne5 10.Qd4 Bc6 11.Rg1; 6.Bh3 e4 7.Nd4 c5 8.Nc2 Nc6 9.Nc3 Be7 10.Ne3 Nd4 11.Nb5; 6.d4 e4 7.Nh4 Be7 8.Bh3 Ng4 9.Nc3 0-0 10.Bg4 fg4 11.b5) 6...e4 7.Nh4 Nc6 8.d4 ed3 9.Qd3 Ne5 10.Qd4 a5 11.b5; F2) 5...e4 6.Nd4 (6.Nh4 g5 7.Ng2 Nc6 8.Nc3 a5 9.b5 Ne5 10.d4 ed3 11.ed3) 6...Qf6 7.Nb3 Nc6 8.Nc3 Nge7 9.Bg2 Be6 10.0-0 Bc4 11.b5; G) 5.Nc3 G1) 5...Nc6 6.b5 (6.d3 Be7 7.Nf3 Nf6 8.Bg2 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2; 6.Bg2 Nf6 7.d3 Be7 8.Nf3 a6 9.0-0 0-0 10.Be3 Ng4 11.Bd2) 6...Nd4 7.Bg2 Nf6 8.Bb7 Rb8 9.Bg2 Kf7 10.e3 Ne6 11.Nge2 ; G2) 5...Nf6 6.b5 (6.d3 Nc6 7.Nf3 Be7 8.Bg2 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2; 6.Bg2 Nc6 7.d3 Be7 8.Nf3 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2; 6.Nf3 e4 7.Nd4 c5 8.bc5 dc5 9.Nc2 Bd6 10.Rb1 0-0 11.Bg2 ) 6...Be6 7.d3 Nbd7 8.Nf3 Nc5 9.Bg2 Be7 10.Be3 0-0 11.0-0.

4.g3 Be6 A) 5.Nf3 A1) 5...Bc4 6.d3 (6.Bh3 Ne7 7.d3 Bf7 8.Nc3 Qd7 9.d4 ed4 10.Nd4 Nbc6 11.0-0; 6.Nc3 Ne7 7.d3 Bf7 8.Bh3 Qd7 9.d4 ed4 10.Nd4 Nbc6 11.0-0) 6...Bf7 7.Nc3 Nc6 8.Bh3 Nge7 9.Qa4 a6 10.0-0 Qd7 11.b5; A2) 5...Nc6 6.b5 (6.d3 Nf6 7.Nc3 Be7 8.Bg2 0-0 9.Ng5 Bd7 10.b5 Na5 11.Nd5; 6.Nc3 Bc4 7.d3 Bf7 8.Bh3 Qd7 9.0-0 Nf6 10.e4 g6 11.b5) 6...Nd4 7.Nd4 ed4 8.Bb2 d5 9.Bd4 dc4 10.e3 Qd5 11.Rg1; A3) 5...Nd7 6.Nc3 (6.d3 a5 7.b5 Nc5 8.Nc3 Nf6 9.Bg2 Be7 10.Be3 0-0 11.0-0; 6.Bg2 a5 7.d3 ab4 8.Ng5 Bf7 9.Bb7 Ngf6 10.Ba8 Qa8 11.0-0; 6.Qb3 b5 7.d3 Be7 8.Nc3 bc4 9.dc4 a5 10.Ra2 Qb8 11.Ng5; 6.Qc2 a5 7.b5 Be7 8.d4 Bf6 9.d5 Bf7 10.Nc3 e4 11.Nh4) 6...a5 7.Qb3 Ngf6 8.Ng5 Bg8 9.Bh3 h6 10.Nf3 Be6 11.0-0; A4) 5...a5 6.b5 (6.Qa4 Nd7 7.Nc3 Ngf6 8.Ng5 Bg8 9.Bh3 ab4 10.Qb4 h6 11.Nf3) 6...Bc4 7.Nc3 Be7 8.Bh3 Nh6 9.d3 Be6 10.Bh6 gh6 11.d4; A5) 5...Nf6 6.Bg2 (6.Nc3 Nc6 7.d3 Be7 8.Bg2 0-0 9.Ng5 Bd7 10.b5 Na5 11.Nd5; 6.e3 a5 7.b5 Nbd7 8.Ng5 Bg8 9.Nc3 e4 10.d4 Nb6 11.d5; 6.d3 a5 7.b5 Nbd7 8.Ng5 Bg8 9.Bh3 h6 10.Nf3 Be6 11.Nc3) 6...Nbd7 7.Qc2 e4 8.Nd4 Qe7 9.Nc3 Ne5 10.0-0 a5 11.Bb2; B) 5.d3 B1) 5...Be7 6.Nc3 (6.Nf3 Bf6 7.Ra2 a5 8.Qb3 Ne7 9.Ng5 Bg5 10.Bg5 Nbc6 11.Bg2; 6.Bg2 Qc8 7.Nc3 Nf6 8.Nf3 0-0 9.Ng5 Nc6 10.Ne6 Qe6 11.Bd5) 6...Nf6 7.Nh3 0-0 8.Bg2 Nc6 9.Ng5 Bd7 10.b5 Na5 11.Nd5; B2) 5...Nd7 6.Nc3 (6.Nf3 a5 7.b5 Nc5 8.Nc3 Nf6 9.Bg2 Be7 10.Be3 0-0 11.0-0; 6.Bg2 a5 7.Nf3 Be7 8.b5 Bf6 9.Bb2 Ne7 10.0-0 0-0 11.Nc3) 6...a5 7.b5 Ngf6 8.Nf3 Nc5 9.Bg2 Be7 10.Be3 0-0 11.0-0; B3) 5...a5 6.b5 Nf6 7.Nh3 h6 8.Bg2 d5 9.0-0 Bc5 10.Nc3 0-0 11.Bb2; B4) 5...Qc8 6.Nc3 (6.Nf3 Nf6 7.Nc3 a5 8.b5 Nbd7 9.Bg2 Be7 10.Ng5 Nc5 11.Be3; 6.Bg2 a5 7.b5 Nd7 8.Nf3 Ngf6 9.Nc3 Be7 10.Ng5 Nc5 11.0-0; 6.Nh3 Nf6 7.Ng5 Nc6 8.Ne6 Qe6 9.b5 Ne7 10.Bg2 d5 11.Nd2; 6.Bd2 Nf6 7.Nc3 Be7 8.Nf3 0-0 9.Bg2 Nc6 10.0-0 a6 11.Ng5) 6...Nf6 7.Bg2 Be7 8.Nf3 a5 9.Qa4 Nc6 10.b5 Nd4 11.0-0; B5) 5...Nh6 6.Nc3 (6.Nf3 Nc6 7.Nc3 Be7 8.Bg2 0-0 9.Bh6 gh6 10.0-0 Bf6 11.Qc2; 6.Nh3 Be7 7.Bg2 c6 8.Nc3 Nd7 9.Rb1 0-0 10.b5 Rc8 11.Bh6; 6.Bg2 e4 7.Nc3 Qf6 8.Bd2 Nc6 9.de4 Bc4 10.Nd5 Bd5 11.ed5; 6.Bh6 gh6 7.Bg2 Nc6 8.b5 Na5 9.Qa4 c6 10.Nc3 cb5 11.Nb5) 6...Ng4 7.Nf3 Nc6 8.Bg2 Be7 9.h3 Nf6 10.Ng5 Bc8 11.b5; B6) 5...Nc6 6.b5 (6.Nc3 e4 7.Nh3 Qf6 8.Bd2 Nd4 9.Nf4 ed3 10.ed3 a5 11.ba5; 6.Nf3 Nf6 7.Nc3 Be7 8.Bg2 0-0 9.Ng5 Bd7 10.0-0 Rb8 11.Nf3) 6...Nce7 7.Nf3 Nf6 8.Nc3 a6 9.ba6 Ra6 10.Rb1 b6 11.Bg2; B7) 5...Nf6 6.Nf3 (6.Nc3 a5 7.b5 d5 8.Bg2 dc4 9.Bb7 Ra7 10.Bf3 Qd4 11.Bb2; 6.Bg2 a5 7.b5 d5 8.Nc3 dc4 9.Bb7 Ra7 10.Bf3 Qd4 11.Bb2; 6.Nh3 h6 7.Nc3 a5 8.b5 Nbd7 9.Bg2 Nc5 10.0-0 Kf7 11.Be3) 6...Nc6 7.Nc3 Be7 8.Bg2 0-0 9.Ng5 Bd7 10.b5 Na5 11.Nd5; C) 5.Nc3 C1) 5...Bc4 6.Qa4 (6.d3 Bf7 7.Nf3 Ne7 8.Bh3 Qd7 9.d4 ed4 10.Nd4 Nbc6 11.0-0; 6.Nf3 Nf6 7.d3 Bf7 8.Bh3 Qd7 9.0-0 Nc6 10.e4 g6 11.b5) 6...Nd7 7.d3 Be6 8.Nf3 Be7 9.Bg2 Bf6 10.Qc2 c6 11.0-0; C2) 5...Be7 6.Nf3 (6.Bg2 Nc6 7.b5 Na5 8.Qa4 Nc4 9.Bb7 Nf6 10.Nf3 Nd7 11.Ba8) 6...Nd7 7.d3 a5 8.Bd2 Nh6 9.Bg2 0-0 10.Bh6 gh6 11.0-0; C3) 5...Nc6 6.b5 (6.d3 e4 7.Nh3 Qf6 8.Bd2 0-0-0 9.Nf4 Nge7 10.Ne6 Qe6 11.de4; 6.Nf3 Nf6 7.d3 Be7 8.Bg2 0-0 9.Ng5 Bc8 10.0-0 h6 11.b5; 6.e3 Nf6 7.Nf3 e4 8.Ng5 Bg8 9.d4 a6 10.d5 Ne5 11.Be2) 6...Na5 7.d3 a6 8.Nf3 ab5 9.Ng5 Bd7 10.cb5 Be7 11.f4; C4) 5...a5 6.Bg2 (6.b5 Nd7 7.d3 Nc5 8.Nf3 Nf6 9.Bg2 Be7 10.Be3 0-0 11.0-0; 6.Qa4 Nd7 7.Nf3 c6 8.d3 Nb6 9.Qb3 ab4 10.Qb4 Nf6 11.Be3) 6...ab4 7.Bb7 Nd7 8.Ba8 Qa8 9.Nd5 Bd5 10.cd5 Qd5 11.Nf3; C5) 5...Nd7 6.d3 (6.Qb3 a5 7.Nf3 Ngf6 8.Ng5 Bg8 9.Bb2 Ng4 10.h4 h6 11.Nf3; 6.Bg2 a5 7.b5 Nc5 8.d3 Nf6 9.Nf3 Be7 10.Be3 0-0 11.0-0; 6.Nf3 a5 7.Qb3 Ngf6 8.Ng5 Bg8 9.Bh3 h6 10.Nf3 e4 11.Nh4) 6...a5 7.Bb2 Ngf6 8.Nf3 Ng4 9.Bg2 Be7 10.h3 Nh6 11.0-0; C6) 5...Nf6 6.Bg2 (6.Nf3 Bc4 7.d3 Bf7 8.Bh3 Qd7 9.0-0 Nc6 10.e4 g6 11.b5; 6.d3 a5 7.b5 d5 8.Bg2 dc4 9.Bb7 Ra7 10.Bf3 Nbd7 11.dc4; 6.Bh3 Nc6 7.Nf3 a5 8.ba5 Na5 9.Qc2 Ng4 10.0-0 Nc4 11.d3) 6...a5 7.b5 e4 8.d3 d5 9.Nh3 dc4 10.Nf4 Bf7 11.de4.

4.g3 Be7 A) 5.Bg2 Nf6 (5...Nc6 6.b5 Nd4 7.Nf3 Nf3 8.Bf3 Nf6 9.Nc3 e4 10.Bg2 0-0 11.d3) 6.Nc3 (6.Nf3 e4 7.Nd4 d5 8.d3 dc4 9.dc4 c5 10.bc5 Bc5 11.Be3) 6...0-0 7.Nf3 Nc6 8.b5 Nd4 9.d3 a6 10.0-0 Ne6 11.a4; B) 5.d3 B1) 5...a5 6.b5 (6.Qa4 Bd7 7.b5 Na6 8.Be3 Nf6 9.Qc2 Nc5 10.Nc3 0-0 11.Nf3) 6...Nf6 7.Nf3 Nbd7 8.Bg2 0-0 9.0-0 Nc5 10.Nc3 a4 11.Rb1; B2) 5...Nf6 6.Nc3 (6.Nf3 e4 7.de4 fe4 8.Nd4 c5 9.Nb5 a6 10.N5c3 0-0 11.Bg2; 6.Bh3 Nc6 7.b5 Nd4 8.Nc3 0-0 9.e3 Ne6 10.Nge2 Nc5 11.0-0; 6.Bg2 a5 7.b5 0-0 8.Nc3 Nbd7 9.Nf3 Nc5 10.0-0 Bd7 11.Be3) 6...a5 7.b5 0-0 8.Nf3 Nbd7 9.Bg2 Nc5 10.0-0 a4 11.Rb1; C) 5.Nf3 C1) 5...e4 6.Nd4 Nf6 7.Nc3 Nc6 8.Nc6 bc6 9.Bg2 a5 10.b5 0-0 11.bc6; C2) 5...Bf6 6.Nc3 (6.Bb2 Ne7 7.Bg2 e4 8.Bf6 ef3 9.Bf3 gf6 10.Nc3 Nbc6 11.d4; 6.e3 e4 7.Nd4 c5 8.bc5 dc5 9.Nb3 Ba1 10.Na1 Nc6 11.Nb3) 6...e4 7.Nh4 Nc6 8.Qa4 Nge7 9.b5 Ne5 10.Bg2 Be6 11.0-0; C3) 5...a5 6.b5 Nf6 7.Nc3 Nbd7 8.Bg2 0-0 9.d3 Nc5 10.0-0 a4 11.Rb1; C4) 5...Kf7 6.d3 (6.Nc3 e4 7.Nd4 Bf6 8.e3 Bd4 9.ed4 Nc6 10.d5 Ne5 11.Be2; 6.Bg2 e4 7.Nd4 Bf6 8.Nb3 Ba1 9.Na1 Nc6 10.Nc3 Be6 11.Nc2; 6.h4 Nc6 7.Nc3 Nf6 8.d3 h6 9.Bg2 a6 10.0-0 Be6 11.Be3) 6...Bf6 7.h4 e4 8.Ng5 Kf8 9.Ra2 h6 10.Nh3 ed3 11.Qd3; C5) 5...a6 6.Bg2 (6.Nc3 Nf6 7.Bg2 Nc6 8.d3 Bd7 9.0-0 0-0 10.Be3 Ng4 11.Bd2; 6.d4 e4 7.Nh4 g5 8.Ng2 Nc6 9.h4 Bf6 10.e3 g4 11.Nc3; 6.Qa4 Bd7 7.b5 Nf6 8.Nc3 0-0 9.Bh3 Ne4 10.0-0 Nc5 11.Qb4; 6.Bb2 Nf6 7.Nc3 Nc6 8.d3 e4 9.de4 fe4 10.Nd4 Ne5 11.Qb3) 6...Nc6 7.b5 Na5 8.Nc3 Nf6 9.0-0 0-0 10.Qa4 ab5 11.cb5; C6) 5...Nd7 6.Nc3 (6.Bg2 Ngf6 7.Nc3 0-0 8.0-0 e4 9.Nd4 Ne5 10.d3 c5 11.Nb3; 6.Bh3 Nb6 7.Nc3 Nf6 8.d3 0-0 9.Qb3 Be6 10.Ng5 Qd7 11.e4; 6.Qb3 Ngf6 7.c5 e4 8.Ng5 Ne5 9.Nc3 dc5 10.Ne6 Be6 11.Qe6) 6...Ngf6 7.Bg2 0-0 8.0-0 a5 9.Bb2 Nb6 10.d3 Bd7 11.c5; C7) 5...Bd7 6.Nc3 (6.b5 Nf6 7.Bh3 0-0 8.Nc3 a6 9.0-0 Ne4 10.Bb2 Nc3 11.Bc3; 6.d3 Bf6 7.Bb2 e4 8.Nd4 c5 9.Bg2 cd4 10.de4 Nc6 11.b5; 6.Bg2 e4 7.Nd4 Nf6 8.Nc3 c5 9.Nc2 Nc6 10.0-0 Be6 11.Ne3; 6.Bb2 Nf6 7.Nc3 0-0 8.Qb3 Nc6 9.c5 Kh8 10.cd6 Bd6 11.Nb5; 6.d4 e4 7.Nh4 g5 8.Ng2 Bf6 9.Nc3 Nc6 10.e3 Nge7 11.h4; 6.Qb3 e4 7.Nd4 Nc6 8.Nc6 Bc6 9.Nc3 Nf6 10.Bh3 Bd7 11.0-0; 6.Bh3 Nf6 7.Nc3 Nc6 8.d4 Ne4 9.Bb2 Nc3 10.Bc3 e4 11.b5) 6...Nf6 7.d3 0-0 8.b5 a6 9.Bg2 c6 10.0-0 cb5 11.cb5; C8) 5...Nf6 6.Bg2 (6.Nc3 Nc6 7.d3 0-0 8.b5 Nd4 9.Bg2 a6 10.0-0 Ne6 11.a4) 6...e4 7.Nd4 c5 8.bc5 dc5 9.Nc2 0-0 10.Nc3 Nc6 11.0-0; D) 5.d4 D1) 5...e4 6.Nh3 (6.Nc3 Nf6 7.Nh3 a5 8.b5 Nbd7 9.Nf4 Nb6 10.Qb3 a4 11.Qa2; 6.b5 Nf6 7.Nc3 0-0 8.Nh3 a6 9.Nf4 c6 10.Bg2 g5 11.Nh3; 6.Bg2 Nf6 7.Nc3 a5 8.b5 Nbd7 9.Nh3 Nb6 10.Nf4 Kf7 11.Qb3; 6.Bf4 Nf6 7.Nc3 0-0 8.Nh3 a5 9.b5 Nbd7 10.Qb3 Ng4 11.c5; 6.Bb2 Nf6 7.Nc3 0-0 8.Nh3 Nc6 9.Nf4 Qe8 10.Ncd5 Nd5 11.cd5) 6...Nf6 7.Nc3 0-0 8.Nf4 Nc6 9.Bg2 Ng4 10.h3 Nf6 11.0-0; D2) 5...a5 6.b5 (6.Bb2 Nf6 7.de5 de5 8.Qd8 Kd8 9.Nf3 ab4 10.Ne5 Re8 11.Nf7) 6...Nf6 7.Nc3 0-0 8.Bg2 Nbd7 9.Nf3 e4 10.Nd2 Nb6 11.0-0; D3) 5...Nd7 6.Nc3 (6.Bh3 a5 7.Bf5 ab4 8.Nf3 Ngf6 9.Bb2 e4 10.Ng5 Nb6 11.Ne6; 6.Bg2 a5 7.b5 Ngf6 8.Nf3 e4 9.Nfd2 0-0 10.Nc3 Nb6 11.0-0; 6.Bb2 Nh6 7.Nc3 Nb6 8.e3 ed4 9.ed4 d5 10.cd5 0-0 11.Nf3; 6.Nf3 e4 7.Nfd2 Bf6 8.Nc3 Ne7 9.Bg2 0-0 10.0-0 a5 11.b5; 6.Nh3 Nb6 7.Bg2 Nf6 8.Nd2 ed4 9.Bb2 0-0 10.0-0 c5 11.Nf4) 6...a5 7.b5 Ngf6 8.Nf3 0-0 9.Bh3 e4 10.Nh4 Nb6 11.Nf5; D4) 5...Bf6 6.Nc3 (6.de5 Be5 7.Ra2 Nd7 8.Bg2 a5 9.Nf3 ab4 10.Qc2 Ngf6 11.ab4) 6...Ne7 7.de5 Be5 8.Qd3 a5 9.b5 0-0 10.Nf3 Nd7 11.Be3; D5) 5...Nf6 6.de5 de5 7.Qd8 Kd8 8.Nf3 Nc6 9.Bb2 Bd7 10.b5 Nd4 11.Nd4; E) 5.b5 E1) 5...Nd7 6.Nf3 (6.Nc3 Ngf6 7.Nf3 0-0 8.Bg2 Ne4 9.0-0 Ndc5 10.Nd5 Be6 11.d4; 6.Bg2 Ngf6 7.Nf3 0-0 8.0-0 Nb6 9.d3 e4 10.Nd4 d5 11.Nc3; 6.Bh3 Nc5 7.Nf3 Nf6 8.Nc3 0-0 9.0-0 Nfe4 10.Bb2 Be6 11.d3; 6.d3 Nc5 7.Nf3 Nf6 8.Nc3 0-0 9.Bh3 Ng4 10.0-0 Be6 11.Nd5 ; 6.Nh3 Ngf6 7.Nc3 Nc5 8.Bg2 0-0 9.0-0 Nfe4 10.Nd5 h6 11.d3; 6.Bb2 Ngf6 7.Nf3 0-0 8.Nc3 a6 9.Bg2 Nb6 10.d3 ab5 11.cb5) 6...Ngf6 7.Bg2 0-0 8.Nc3 Ne4 9.Bb2 Ndc5 10.0-0 Be6 11.d3; E2) 5...Be6 6.Bg2 (6.Nc3 Nd7 7.Bg2 Nc5 8.Nf3 Nf6 9.d4 Nfe4 10.Nd5 ed4 11.Nd4; 6.Nf3 Nd7 7.Nc3 Bf6 8.e4 Ne7 9.d4 ed4 10.Nd4 Nc5 11.Nd5; 6.Bh3 Bf6 7.Nc3 Ne7 8.d3 Nd7 9.Qc2 a6 10.Nf3 ab5 11.cb5; 6.Qc2 Nd7 7.Bg2 e4 8.Nh3 Ngf6 9.Nf4 Bf7 10.Nc3 0-0 11.d3; 6.Nh3 Nd7 7.Nc3 Nc5 8.d3 a6 9.Be3 ab5 10.cb5 Nb3 11.Rb1 ; 6.d3 Nf6 7.Nf3 h6 8.Nc3 Nbd7 9.Bg2 0-0 10.Nh4 Nc5 11.Ng6; 6.d4 Nf6 7.Nf3 Nbd7 8.Nbd2 0-0 9.Ng5 Bf7 10.Nf7 Rf7 11.Bb2; 6.e3 Nd7 7.Nf3 Nh6 8.Nc3 0-0 9.Bb2 a6 10.a4 Nb6 11.c5) 6...e4 7.Nc3 Nd7 8.d3 Bf6 9.Bb2 Ne7 10.de4 Bc4 11.ef5; E3) 5...Nf6 6.Nc3 (6.Nf3 0-0 7.Bh3 Be6 8.Nc3 Ng4 9.Nd5 a6 10.Qa4 Nd7 11.d4; 6.Bg2 0-0 7.Nc3 e4 8.Nh3 Nbd7 9.Nf4 Ne5 10.Qb3 Nfd7 11.0-0; 6.Bh3 e4 7.Nc3 0-0 8.d3 c6 9.Be3 d5 10.de4 Ne4 11.Ne4; 6.d4 0-0 7.Nc3 ed4 8.Qd4 Nbd7 9.Bg2 Nc5 10.Rb1 Ne6 11.Qd2; 6.Qc2 0-0 7.Nf3 e4 8.Nd4 c5 9.bc6 Nc6 10.Nc6 bc6 11.Nc3) 6...Nbd7 7.Nf3 0-0 8.Bg2 Ne4 9.Bb2 Ndc5 10.0-0 Be6 11.d3; F) 5.Bb2 Nf6 6.Nf3 (6.Nc3 0-0 7.Nf3 Nc6 8.d3 d5 9.b5 Nd4 10.Ne5 Bd6 11.f4; 6.Bg2 0-0 7.Nc3 e4 8.d3 Nc6 9.de4 fe4 10.Ne4 Be6 11.Ng5; 6.d4 ed4 7.Bd4 Nc6 8.Nf3 Be6 9.Bh3 0-0 10.Nc3 Qd7 11.Qc2; 6.d3 0-0 7.Nc3 c5 8.Nf3 Nc6 9.b5 Na5 10.Bg2 e4 11.Nd2) 6...0-0 7.Nc3 Nc6 8.b5 Nd4 9.Nd4 ed4 10.Nd5 Nd5 11.cd5; G) 5.Nc3 G1) 5...a5 6.Bb2 (6.b5 Nf6 7.Nf3 0-0 8.Bg2 Nbd7 9.0-0 Ne4 10.Bb2 Ndc5 11.d4) 6...Nf6 7.Nf3 0-0 8.Bg2 Be6 9.Qb3 ab4 10.ab4 Ra1 11.Ba1; G2) 5...Nf6 6.Nf3 (6.Bg2 0-0 7.Nf3 Nc6 8.b5 Nd4 9.d3 a6 10.0-0 Ne6 11.a4) 6...0-0 7.Bg2 Nc6 8.b5 Nd4 9.d3 a6 10.0-0 Ne6 11.a4.

4.g3 Nf6 5.Nf3 (5.Nc3 A) 5...Be7 6.Nf3 (6.Bg2 Nc6 7.d3 0-0 8.b5 Nd4 9.Nf3 Be6 10.Ng5 Bd7 11.Bb7; 6.d3 a5 7.Bd2 0-0 8.Nf3 Nc6 9.b5 e4 10.bc6 ef3 11.ef3) 6...0-0 7.Bg2 a5 8.b5 Nbd7 9.0-0 Ne4 10.Bb2 Ndc5 11.d4; B) 5...Be6 6.Nf3 (6.Bg2 Nc6 7.d3 d5 8.b5 Na5 9.Qa4 c6 10.Nf3 d4 11.Nd1; 6.Bh3 Be7 7.Nf3 0-0 8.d4 a5 9.d5 ab4 10.de6 bc3 11.Bf5; 6.d3 a5 7.b5 d5 8.Bg2 dc4 9.Bb7 Ra7 10.Bf3 Bc5 11.Nh3) 6...a5 7.Ng5 Bg8 8.Qa4 Nfd7 9.Nf3 Nc6 10.b5 Nc5 11.Qc2; C) 5...a5 6.b5 (6.Bb2 ab4 7.ab4 Ra1 8.Qa1 Be6 9.Qa4 Nbd7 10.d3 d5 11.Nf3) 6...Be7 7.Nf3 0-0 8.Bg2 Nbd7 9.0-0 Ne4 10.Bb2 Ndc5 11.d4; D) 5...Kf7 6.Nf3 (6.Bg2 Nc6 7.d3 h6 8.Nf3 a6 9.0-0 Be6 10.Be3 Be7 11.d4; 6.d3 a5 7.b5 Nbd7 8.Nf3 Nc5 9.Bg2 Be7 10.0-0 Bd7 11.d4; 6.b5 Nbd7 7.Nf3 Ne4 8.Bg2 Ndc5 9.0-0 Be6 10.Qc2 Nc3 11.dc3; 6.h4 Nc6 7.Bg2 a5 8.b5 Nd4 9.d3 Qe7 10.Bg5 h6 11.Nd5; 6.Nh3 Nc6 7.Bg2 Be7 8.0-0 h6 9.b5 Nd4 10.e3 Ne6 11.Qc2) 6...e4 7.Ng5 Kg8 8.d4 h6 9.Nh3 a5 10.b5 Nbd7 11.Nf4; E) 5...e4 6.d3 (6.Nh3 Nc6 7.Nf4 a5 8.b5 Ne5 9.Bg2 g5 10.Nfd5 c6 11.Nf6; 6.Bg2 Nbd7 7.d3 a5 8.b5 Nc5 9.d4 Ne6 10.Nh3 d5 11.c5) 6...Nc6 7.Bg2 ed3 8.ed3 Be7 9.Nf3 0-0 10.0-0 d5 11.cd5; F) 5...Bd7 6.Nh3 (6.Nf3 Be7 7.b5 0-0 8.d3 Bc8 9.Bg2 Nbd7 10.0-0 Nc5 11.Be3; 6.b5 Be6 7.Nf3 Nbd7 8.d3 Nc5 9.Bg2 Be7 10.Be3 0-0 11.0-0; 6.Bg2 Nc6 7.d3 Be7 8.Nf3 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2; 6.d3 Be7 7.Bg2 Nc6 8.Nf3 0-0 9.0-0 a6 10.Be3 Ng4 11.Bd2) 6...Nc6 7.Bg2 Be7 8.b5 Na5 9.Qa4 c6 10.0-0 0-0 11.d3; G) 5...a6 6.Nf3 (6.Bg2 Nc6 7.d3 Be7 8.Nf3 0-0 9.0-0 Bd7 10.Be3 Ng4 11.Bd2; 6.d3 Nc6 7.Nf3 Be7 8.Bg2 0-0 9.0-0 Bd7 10.Be3 Ng4 11.Bd2; 6.d4 ed4 7.Nd5 c6 8.Nf6 Qf6 9.Nf3 c5 10.Bg2 Nc6 11.0-0; 6.Bh3 Nc6 7.Nf3 Be7 8.0-0 0-0 9.d3 Be6 10.Bg2 h6 11.Be3; 6.Nh3 Nc6 7.Bg2 Be7 8.0-0 0-0 9.Nd5 e4 10.Bb2 Ne5 11.Nhf4; 6.Bb2 Nc6 7.Bg2 Be7 8.d3 0-0 9.Nf3 Bd7 10.0-0 f4 11.gf4) 6...Nc6 7.d3 Be7 8.Bg2 0-0 9.0-0 Bd7 10.Be3 Ng4 11.Bd2; H) 5...Nc6 6.Nf3 (6.d3 a5 7.b5 Nd4 8.Bg2 Be7 9.Nf3 0-0 10.Nd4 ed4 11.Nd5; 6.b5 Nd4 7.e3 Ne6 8.Nf3 Be7 9.d4 e4 10.Nh4 0-0 11.Nf5; 6.Bg2 Be7 7.d3 e4 8.de4 fe4 9.Ne4 0-0 10.Ng5 a5 11.b5) 6...e4 7.b5 Ne5 8.Nd4 Be7 9.Bh3 Nc4 10.d3 Ne5 11.0-0; 5.d4 A) 5...ed4 6.Nf3 (6.Bg2 c5 7.Nh3 Nc6 8.0-0 Be7 9.Nf4 0-0 10.Nd2 g5 11.Nd3; 6.Nd2 c5 7.Nh3 Be7 8.Bg2 Nc6 9.0-0 0-0 10.Nf4 g5 11.Nd3 ) 6...c5 7.Bg2 Nc6 8.0-0 Be7 9.Nbd2 0-0 10.Qc2 Bd7 11.b5; B) 5...c5 6.de5 (6.dc5 dc5 7.Qd8 Kd8 8.b5 Be6 9.Bg2 e4 10.Nd2 Bd6 11.Nh3) 6...de5 7.Qd8 Kd8 8.Nf3 Nc6 9.b5 Nd4 10.Nd4 cd4 11.f4) 5...g6 (5...e4 6.Nd4+= Nc6 7.Nc6 bc6 8.Nc3 Be7 9.Bg2 0-0 10.0-0 Be6 11.d3; 5...Nc6 6.b5 e4 7.bc6 ef3 8.e3 bc6 9.Qf3 Rb8 10.Nc3 Be7 11.Qc6; 5...Be7 6.Nc3 (6.Bg2 0-0 7.Nc3 Nc6 8.b5 Nd4 9.d3 a6 10.0-0 Ne6 11.a4 ; 6.Bh3 0-0 7.Nc3 Nc6 8.Bb2 e4 9.Nh4 Nh5 10.e3 Bh4 11.Qh5) 6...0-0 7.Bg2 Nc6 8.b5 Nd4 9.d3 a6 10.0-0 Ne6 11.a4) 6.Bg2= (6.Nc3 Nc6 7.d3 e4 8.de4 fe4 9.Ng5 Bg7 10.Rb1 Bf5 11.Bg2; 6.d3 e4 7.Nd4 Nc6 8.Nc6 bc6 9.Nc3 Bg7 10.Bb2 0-0 11.Bg2) 6...Bg7 (6...e4 7.Nd4 c5 8.Nb3 Nc6 9.Nc3 Be7 10.d3 Be6 11.de4) 7.Bb2 (7.Nc3 0-0 8.Bb2 e4 9.Nd4 Ng4 10.Nd5 Nc6 11.Nc6) 7...0-0 8.0-0 c6 (8...e4 9.Nd4 Ng4 10.Qb3 Bd4 11.c5) 9.d3 (9.Nc3 Be6 10.c5 Nh5 11.e4) 9...Be6 (9...Na6 10.Nc3 Qe7 11.Qd2) 10.Ng5 Bd7 (10...Qe7 11.Nc3) 11.c5 (11.Nc3+=) 11...Ng4 (11...Nd5 12.e4 Qg5 13.ed5=) 12.Qb3 d5 13.Bd5 cd5 14.Qd5 Kh8 15.Nf7 Rf7 16.Qf7 Bc6 17.Qc4 (17.Nc3 a6+=) 17...Bd5= 18.Qc2 Nc6 19.h3 Nf6 20.Nd2 Qe7 21.e3 Nh5 (21...e4 22.Bf6 Qf6 23.d4=) 22.e4 Be6 23.Kg2 (23.b5 Nd8=) 23...Rf8 (23...Qd7 24.Rh1+=) 24.Rh1 Qf7 25.f3 (25.b5 Nd4 26.Bd4 ed4+=) 25...Qe7 (25...fe4 26.de4 Bh6 27.Rhf1 Ng3 28.Kg3 Qf4 29.Kg2 Qg5 30.Kh1–+) 26.Rag1 Qg5+= 27.Kf2 Bh6 28.Nf1 fe4 29.de4 Qf6 30.Qe2?? Bc4!!–+ 31.Qc4 Qf3 32.Ke1 Qf2 33.Kd1 Rd8 34.Qd5 Rd5 35.ed5 Qb2 36.dc6 bc6 37.Rh2 Qd4 (37...Qd4 38.Ke2 Qg1–+) 0–1. Diachuk,Nikolay – Halamay,Pavel, Sun Pawn Open, Ilichevsk UKR, 2007. (=1.a3 e5 2.b4 d6 3.c4 f5)

4.g3 Kf7 A) 5.d3 A1) 5...Nc6 6.Nc3 (6.Bg2 e4 7.Nc3 Qf6 8.Bb2 Nge7 9.de4 a5 10.Na4 Qh6 11.b5; 6.Nf3 a5 7.b5 Nd4 8.Bg2 Nf6 9.Nc3 Be7 10.0-0 Qd7 11.Bd2) 6...a5 7.b5 Nd4 8.Bg2 Nf6 9.Nf3 Be7 10.0-0 Qd7 11.Bd2; A2) 5...Bd7 6.Bg2 (6.Nc3 Bc6 7.e4 fe4 8.b5 Bd7 9.de4 Nf6 10.Nf3 Be7 11.Be2; 6.Nf3 Be7 7.Nc3 Nc6 8.Bg2 Nf6 9.0-0 h6 10.Be3 Ng4 11.Bd2) 6...Nc6 7.Nf3 Nf6 8.Nc3 a6 9.0-0 h6 10.Be3 Be7 11.Nd5; A3) 5...g6 6.Nc3 (6.Nf3 Nf6 7.Nc3 Kg7 8.Bg2 a5 9.b5 Nbd7 10.0-0 Nc5 11.d4; 6.Bg2 a5 7.b5 Nd7 8.Nf3 Kg7 9.0-0 Ngf6 10.Nc3 Nc5 11.d4) 6...Nc6 7.Nf3 Nf6 8.Bg2 Be7 9.0-0 a6 10.Bh6 Ng4 11.Bd2; A4) 5...Nf6 6.Nf3 a5 7.b5 h6 8.Nc3 Be6 9.Bg2 Nbd7 10.0-0 Be7 11.Qc2; A5) 5...a5 6.b5 Nf6 7.Nf3 h6 8.Nc3 Nbd7 9.Bg2 Nc5 10.Be3 Qe8 11.0-0; A6) 5...a6 6.Nc3 (6.Nf3 Nf6 7.Nc3 Nc6 8.Bg2 h6 9.0-0 Be6 10.Be3 Be7 11.d4; 6.Bg2 Nf6 7.Nf3 Nc6 8.Nc3 h6 9.0-0 Be6 10.Be3 Be7 11.d4) 6...Nc6 7.Nf3 Nf6 8.Bg2 h6 9.0-0 Be6 10.Be3 Be7 11.d4; A7) 5...c5 6.Bg2 (6.Nf3 Nf6 7.Bg2 Nc6 8.Nc3 h6 9.0-0 Be6 10.b5 Na5 11.Qc2; 6.b5 Be7 7.Nc3 a6 8.Bg2 ab5 9.Nb5 Nf6 10.Nf3 h6 11.0-0; 6.Nc3 Nc6 7.Nf3 Nf6 8.Bg2 h6 9.0-0 cb4 10.ab4 Nb4 11.Qb3) 6...Nc6 7.Nf3 Nf6 8.Nc3 h6 9.0-0 Be6 10.Rb1 cb4 11.ab4; A8) 5...h6 6.Nf3 (6.Bg2 Nf6 7.Nc3 Nc6 8.Nf3 a6 9.0-0 Be6 10.Be3 Be7 11.d4; 6.Nc3 Nf6 7.Bg2 Nc6 8.Nf3 a6 9.0-0 Be6 10.Be3 Be7 11.d4) 6...Nf6 7.Bg2 e4 8.de4 fe4 9.Nfd2 a5 10.Ne4 ab4 11.Bb2; A9) 5...Ne7 6.Nc3 (6.Nf3 Nbc6 7.Nc3 Nd4 8.Bg2 Bd7 9.Ng5 Kg6 10.Bb7 Rb8 11.Bg2; 6.Bg2 Nbc6 7.Nf3 Bd7 8.Nc3 Nd4 9.Ng5 Kg8 10.Bb7 Rb8 11.Bg2) 6...a5 7.b5 d5 8.Nf3 d4 9.Na4 Qd6 10.c5 Qf6 11.Bg5; B) 5.Bg2 B1) 5...Nd7 6.d4 (6.Nf3 e4 7.Nd4 c5 8.Nf5 Qf6 9.Nc3 Qf5 10.Be4 Qf6 11.Bd5; 6.Nc3 a5 7.b5 Nc5 8.d3 Be7 9.Nf3 Bf6 10.Be3 Nh6 11.Bh6; 6.Nh3 a5 7.b5 Be7 8.Nc3 Nc5 9.0-0 Bf6 10.Nd5 Bd7 11.d3; 6.d3 a5 7.Nf3 Be7 8.b5 Bf6 9.Bb2 Ne7 10.Nc3 Nc5 11.0-0) 6...a5 7.Nf3 Be7 8.Qb3 a4 9.Qe3 Nb6 10.de5 Nc4 11.Qd3; B2) 5...Nf6 6.Nc3 (6.d3 a5 7.b5 Nbd7 8.Nc3 Be7 9.Nf3 Nc5 10.0-0 Re8 11.Be3; 6.Nh3 h6 7.Nc3 Nc6 8.0-0 a6 9.d3 Be7 10.Be3 Be6 11.Nd5) 6...Nc6 7.d3 a6 8.Nf3 h6 9.0-0 Be6 10.Be3 Be7 11.d4; C) 5.Nc3 C1) 5...Nf6 6.Bg2 (6.d3 h6 7.Bg2 Nc6 8.Nf3 e4 9.de4 Ne4 10.Ne4 fe4 11.Nd4; 6.Nf3 e4 7.Ng5 Kg6 8.d3 h6 9.Nh3 Nc6 10.Nf4 Kh7 11.de4; 6.Nh3 Nc6 7.Bg2 h6 8.b5 Nd4 9.e3 Ne6 10.0-0 a6 11.Bb2; 6.b5 Nbd7 7.Nf3 Ne4 8.Bg2 Ndc5 9.0-0 Be6 10.Qc2 Nc3 11.dc3) 6...a5 7.b5 Nbd7 8.d3 Nc5 9.Nf3 Bd7 10.0-0 h6 11.Be3; C2) 5...Be7 6.Bg2 (6.d3 a5 7.b5 Nd7 8.Nf3 Nc5 9.Bg2 Bf6 10.Bb2 Ne7 11.0-0; 6.Nf3 e4 7.Nd4 Bf6 8.e3 Bd4 9.ed4 Nc6 10.d5 Ne5 11.Be2) 6...Nf6 7.Nf3 a5 8.b5 Ne4 9.Nd5 Be6 10.d3 Nc5 11.d4; C3) 5...Nc6 6.Bg2 (6.Nh3 Nf6 7.Bg2 Ne4 8.Ne4 fe4 9.0-0 Be6 10.Qc2 Be7 11.f4; 6.d3 Nd4 7.Bg2 Nf6 8.Nf3 a5 9.b5 Be7 10.0-0 Qd7 11.Bd2) 6...Be7 7.d3 Nf6 8.Nf3 a6 9.Ng5 Kg6 10.h4 h6 11.h5.

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

4.Nc3 Nf6 5.Bb2 (5.d3 a5 6.Rb1 ab4 7.Rb4 Bc8=+) 5...Nc6=+ 6.b5 (6.Nf3 Be7=+) 6...Nd4–/+ 7.d3 Qd7 (7...Bg4 8.Nf3=+) 8.e3 Ne6 9.Nge2 (9.Be2 0-0-0=) 9...Be7= 10.Ng3 Bg6 (10...Bg4 11.f3 Bh5 12.Nh5 Nh5 13.Be2+=) 11.Be2 0-0 12.0-0 Ne8 (12...a6 13.ba6 Ra6 14.Bf3=+) 13.Nd5 (13.f4 ef4 14.ef4 f5+=) 13...c6 (13...Bh4 14.Bf3+=) 14.Ne7+/– Qe7 15.a4 (15.f4 ef4 16.ef4 f5+/–) 15...N8c7 (15...Nf6 16.f4 ef4 17.ef4+-) 16.Ba3 (16.f4 ef4 17.ef4 f5+=) 16...c5 (16...f5 17.Bf3 f4 18.ef4=) 17.Bf3 Rab8 18.Bb2 (18.a5 Ng5 19.Be2 f6+=) 18...a5 (18...f5 19.a5+=) 19.Qd2 b6 20.Ne2 f5 21.Nc3 Ng5 (21...f4 22.Rae1+=) 22.Bc6 Be8 23.Bd5 (23.Nd5 Nd5 24.Bd5 Bf7+=) 23...Bf7 24.Bc6 (24.Bf7 Nf7 25.f4 Rbe8=) 24...Be8 25.Nd5 Nd5 26.Bd5 Bf7 27.Bc6 (27.Bf7 Nf7 28.f4 Rbe8=) 27…Be8 ½–½. Nebylitsin,Nikolai (2225) – Spirin,Alexey (2310), Novosibirsk op, 2001.

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

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

4.Nc3 Nc6 5.Nf3 =+.

4.Nc3 Be6 5.e3 Be7 6.Nf3 (6.d4 ed4 7.ed4 d5=+) 6...Nbd7 (6...0-0 7.d4=) 7.d4= 0-0 (7...a5 8.b5=) 8.Be2 (8.Bd3 a5 9.b5 ed4 10.ed4 c5=) 8...ed4 (8...a5 9.b5=) 9.Nd4 Ne5 (9...a5 10.Bb2=) 10.f4+= Nc4? (better 10...Nc6+=) 11.Ne6+- fe6 (11...Ne3 12.Be3 fe6 13.0-0+-) 12.Bc4 d5 13.Bd3 c5 14.bc5 Bc5 15.Na4 (15.Rb1 Qe7 16.Qb3 b6+-) 15...Bd6 16.0-0 a6 17.Bb2 b5 18.Nc3 Bc5 (18...Qb6 19.Qe2+-) 19.Qf3 d4? (better 19...Rc8+-) 20.Ne4 Ne4 (20...Ba7 21.Qh3 Qd7 22.Ng5+-) 21.Qe4 (worse 21.Be4 de3 22.Kh1 Ra7+-) 21...g6 22.Qe6 Kg7 (22...Rf7 23.f5 Qd7+-) 23.Qe5 Qf6 (23...Kf7 24.f5 g5 25.Qc5+-) 24.Qc5 Rac8 25.Qd4 Qd4 26.Bd4 Kh6 (26...Kf7 27.a4 ba4 28.Ra4+-) 27.Rf3 (27.Rf3 Rc5 28.g4+-) 1–0. Flores,Luis (2115) – Goldmund,Heike, FICGS, 2016.

4.Nc3 Be6 5.e4 a6 6.Nf3 Be7 7.d4 Bg4 (7...Nbd7!?=) 8.de5+= de5 (8...Bf3!? 9.gf3 de5 10.Qd8 Kd8+=) 9.Qd8+/– Bd8 10.Ne5 Bh5 (10...Be6 11.Bb2+/–) 11.Bf4 0-0 (11...c6 12.f3+-) 12.f3 Re8 13.g4 c5 (13...Bg6 14.h4 h6 15.Rd1+-) 14.gh5 Nh5 15.Nd3 cb4 (15...Nf4 16.Nf4 Nc6 17.bc5+-) 16.ab4 Nc6 (16...Nf4 17.Nf4 Nc6 18.Nfd5+-) 17.Be3 Bf6 18.Ra3 Rad8 (18...Bd4 19.Kd2 f5 20.Bg2+-) 19.Nd5 (19...Bd4 20.Nc5 Bc5 21.Bc5+-) 1–0. guest5439 – guest78, ICC, 2005.

4.Nc3 Be6 5.e4 Nc6=.

4.Nc3 g6 5.Bb2 Nc6 A) 6.Nf3 Bh6 (6...Bg7 7.b5 Nd4 8.e3 Ne6 9.Be2 0-0 10.0-0 a6 11.a4 Re8; 6...Bf5 7.h3 Bg7 8.g4 Be6 9.e3 0-0 10.Qb3 h6 11.Bd3 Qd7; 6...a6 7.e3 Bf5 8.h3 Be7 9.g4 Be6 10.d4 ed4 11.Nd4 Bd7; 6...Be6 7.e3 Bg7 8.b5 Ne7 9.d4 ed4 10.Nd4 0-0 11.Bd3 d5) 7.b5 Ne7 8.e3 0-0 9.Be2 e4 10.Nd4 Nf5 11.0-0 Nd4; B) 6.e3 Bh6 (6...Bg7 7.Nf3 0-0 8.Bd3 d5 9.cd5 Nd5 10.b5 Nc3 11.dc3 Na5; 6...Bf5 7.b5 Na5 8.Nf3 Bg7 9.Qa4 b6 10.Be2 0-0 11.0-0 Qd7) 7.Nf3 0-0 8.Bd3 Re8 9.Qc2 a6 10.h3 Bd7 11.0-0 Be6; C) 6.b5 Nd4 (6...Ne7 7.Nf3 Bh6 8.e3 0-0 9.Bd3 a6 10.0-0 ab5 11.cb5 Be6) 7.e3 Ne6 8.Nf3 Bg7 9.Be2 0-0 10.0-0 a6 11.a4 Re8.

4.Nc3 g6 5.Bb2 Bg7 6.e3 (6.e4 0-0 (6...a5 7.Nf3 0-0 8.Be2 Nc6 9.b5 Nd4 10.0-0 Bd7 11.h3 Re8; 6...Nc6 7.Bd3 0-0 8.Nge2 a5 9.b5 Ne7 10.0-0 c6 11.h3 Be6) 7.Bd3 Nc6 8.Nge2 Be6 9.0-0 Re8 10.Qb3 a5 11.Nd5 Bd7; 6.Nf3 0-0 7.e4 Nc6 8.Be2 a5 9.b5 Nd4 10.0-0 Bd7 11.h3 Re8; 6.Qc2 0-0 (6...a5 7.Nf3 ab4 8.ab4 Ra1 9.Ba1 0-0 10.e3 Na6 11.Qb2 Bd7; 6...Nc6 7.Nf3 0-0 8.e3 e4 9.Ne4 Ne4 10.Bg7 Kg7 11.Qe4 Re8) 7.Nf3 a5 8.b5 Nbd7 9.e4 Nc5 10.Be2 Nh5 11.0-0 Nf4) 6...0-0 (6...Nc6 7.Nf3 0-0 8.Bd3 d5 9.cd5 Nd5 10.b5 Nc3 11.dc3 Na5) 7.Qb3 (7.Be2 a5= (7...Nc6 8.b5 Na5 9.Qa4 c5 10.Nf3 e4 11.Ng5 h6) 8.Nf3 e4 9.Nd4 c5 10.bc5 dc5 11.Ndb5 Nc6; 7.Bd3 Re8 8.f3 Nc6 9.Nge2 a5 10.Qb3 ab4 11.ab4 Ra1) 7...Be6 (7...Nc6 8.b5 (8.Bd3 Re8 9.f3 e4 10.Ne4 Ne4 11.Be4 Bb2) 8...Na5 9.Qa4=+ c6 10.Nf3 e4 11.Nd4 Bd7) 8.Nf3= Ne8 (8...Nc6 9.Be2= (9.Bd3 d5 10.cd5 Nd5 11.Bc4 Nc3) 9...e4 10.Ng5 Bf5 11.f3 ef3) 9.d3 (9.Bd3 Nc6 10.0-0 a6 11.h3 Nf6) 9...c6 (9...a5 10.Be2 ab4 11.ab4 Ra1) 10.a4 (10.Be2 Nd7 11.0-0 Nef6) 10...f5 (10...a5 11.Ne4 Nf6) 11.Be2 (11.h4 f4) 11...Kh8 (11...a5=) 12.b5 Nd7 13.d4 e4 14.Nd2 Qg5 15.g3 (15.0-0 Rc8+=) 15...a6 16.Rb1 ab5 17.ab5 c5 (17...Nef6 18.h4 Qh6 19.g4 Ng4 20.Bg4 fg4 21.Nde4=+) 18.Nd5 (better 18.d5!? Bf7 19.h4+=) 18...Bd5=+ 19.cd5 cd4 20.ed4 Bh6 21.Nc4 f4 22.0-0 (22.h4!? Qd5 23.h5–/+) 22...f3–+ 23.Bd1 Qg4 24.Kh1?? (24.Ne3 Qh5 25.Bc2–/+) 24...Qh3 25.Rg1 Nef6 26.Bf3 ef3 27.Qf3 (27.Ne5 de5 28.Qf3 Ng4 29.Qg4 Qg4–+) 27...Ng4 28.Qg4 Qg4 (28...Qg4 29.f4 Qf3 30.Rg2 Bg7–+) 0–1. Lebel Arias,Julia (2055) – Delahaye,Raphaelle (2055), FRA–ch (Women), 1995.

4.Nc3 g6 5.d3 A) 5...Nc6 A1) 6.b5 Nd4 (6...Ne7 7.Nf3 Bg7 8.g3 0-0 9.Bd2 Bg4 10.Bg2 a6 11.0-0 ab5) 7.e3 Ne6 8.Nf3 Bg7 9.Be2 a6 10.0-0 0-0 11.Bb2 ab5; A2) 6.Bg5 Be7 (6...Bg7 7.Nf3 0-0 8.Nd5 Nd4 9.e3 Ne6 10.Bf6 Bf6 11.h4 Bh8; 6...Bd7 7.Nf3 Bg7 8.h4 h6 9.Bf6 Bf6 10.h5 g5 11.e3 Bg7) 7.Nf3 0-0 8.g3 Bf5 9.Bg2 Qd7 10.0-0 a6 11.Qd2 Rfe8; A3) 6.Nf3 Bg7 (6...Bd7 7.g3 Bg7 8.Bg2 0-0 9.Bd2 Re8 10.b5 Nd4 11.0-0 Qe7; 6...a6 7.g3 Bg7 8.Bg2 0-0 9.Bg5 h6 10.Bf6 Bf6 11.Qd2 Be6; 6...Bf5 7.e4 Bg4 8.Be2 Bg7 9.0-0 0-0 10.Be3 a5 11.Qb3 Bf3; 6...Bg4 7.h3 Bf3 8.gf3 Bg7 9.Bg5 h6 10.Be3 0-0 11.Bg2 Re8) 7.e4 0-0 8.Be2 Bg4 9.0-0 a5 10.b5 Bf3 11.Bf3 Nd4; B) 5...Bf5 B1) 6.h3 Bg7 (6...Be6 7.g4 Bg7 8.Bg2 e4 9.Bb2 ed3 10.Bb7 Nbd7 11.ed3 Rb8; 6...a5 7.b5 Nbd7 8.g4 Be6 9.Bg2 Nc5 10.Nf3 Bg7 11.Ng5 Bd7) 7.g4 Bd7 8.Bg2 Nc6 9.b5 Na5 10.Bd2 a6 11.Qa4 c6; B2) 6.g3 a5 (6...Nc6 7.Bg2 a6 8.Nf3 Bg7 9.0-0 0-0 10.Bg5 h6 11.Bf6 Qf6; 6...Bg7 7.Bg2 Qc8 8.Nf3 0-0 9.0-0 Nc6 10.Be3 e4 11.Nd4 ed3; 6...Be7 7.Bg2 Nc6 8.b5 Na5 9.Qa4 c6 10.bc6 bc6 11.Rb1 Qc7) 7.b5 Nbd7 8.Bh3 Bh3 9.Nh3 Be7 10.0-0 Nc5 11.Ng5 0-0; B3) 6.Nf3 Bg7 (6...Nc6 7.e4 Bd7 8.Be2 Bg7 9.Be3 0-0 10.h3 Nh5 11.Bg5 Bf6) 7.e4 Be6 8.Be2 0-0 9.Be3 a5 10.0-0 Ng4 11.Bd2 ab4; B4) 6.e4 Be6 (6...Bd7 7.b5 Bg7 8.Be2 Be6 9.Nf3 Nbd7 10.d4 0-0 11.d5 Bg4) 7.Nf3 Bg7 8.Be2 0-0 9.Be3 a5 10.0-0 Ng4 11.Bd2 ab4; C) 5...Bg7 C1) 6.g3 Nc6 (6...0-0 7.Nf3 a5 8.b5 Nbd7 9.Be3 Nc5 10.Bc5 dc5 11.Bg2 Qe7) 7.Nf3 0-0 8.Bd2 Bf5 9.b5 Nd4 10.Bg2 Re8 11.Nh4 Bg4; C2) 6.Bg5 h6 (6...0-0 7.Nf3 h6 8.Bf6 Bf6 9.g3 a5 10.b5 Bf5 11.e4 Be6) 7.Be3 0-0 8.Nf3 Re8 9.Qc1 a5 10.Rb1 h5 11.ba5 Nc6; C3) 6.Nf3 0-0 7.Bg5 h6 8.Bf6 Bf6 9.Qd2 Nc6 10.e3 a5 11.b5 Ne7.

4.Nc3 g6 5.e3 Nc6 A) 6.Nf3 e4 (6...Bg7 7.Bb2 0-0 8.Bd3 d5 9.cd5 Nd5 10.b5 Nc3 11.dc3 Na5) 7.b5 Ne5 8.Ne5 de5 9.Qc2 Bf5 10.g3 Rb8 11.Bg2 Qd3; B) 6.Bb2 Bg7 (6...Bh6 7.Bd3 0-0 8.b5 Ne7 9.Nf3 a6 10.0-0 ab5 11.cb5 Be6) 7.Nf3 Bf5 8.b5 Ne7 9.Be2 0-0 10.0-0 Qd7 11.Qb3 a6; C) 6.Be2 Bh6 (6...d5 7.b5 Ne7 8.cd5 Ned5 9.Bb2 Bg7 10.Nf3 Qd6 11.d4 ed4; 6...Bd7 7.Nf3 Bg7 8.Qc2 0-0 9.0-0 Qe7 10.b5 e4 11.Ng5 Na5; 6...a6 7.Nf3 Bg7 8.d4 0-0 9.0-0 ed4 10.ed4 Re8 11.Bg5 h6; 6...Bg7 7.b5 Ne7 8.Nf3 0-0 9.Bb2 Nf5 10.0-0 Qe7 11.d3 Bd7) 7.b5 Na5 8.Nf3 0-0 9.Qa4 c5 10.d3 a6 11.0-0 ab5; D) 6.Bd3 Bg7 (6...e4 7.Ne4 Ne5 8.Bc2 Bg7 9.Ne2 Ne4 10.Be4 Nc4 11.d4 d5; 6...Bh6 7.b5 Ne7 8.Nf3 a6 9.0-0 0-0 10.a4 ab5 11.cb5 c5; 6...a5 7.b5 e4 8.Be4 Ne4 9.Ne4 Bg7 10.d4 d5 11.bc6 de4) 7.Bb2 0-0 8.Nf3 d5 9.cd5 Nd5 10.b5 Nc3 11.dc3 Na5; E) 6.b5 Ne7 (6...Na5 7.Qa4 b6 8.Nf3 Bg7 9.Bb2 0-0 10.Be2 a6 11.0-0 ab5) 7.Nf3 Bg7 8.d4 Bf5 9.Be2 0-0 10.0-0 Qd7 11.de5 Ng4.

4.Nc3 g6 5.e3 Bg7 6.Bb2 0-0 7.Be2 Nc6 8.b5 Na5 9.Qa4 c5 10.Nf3 e4 11.Ng5 h6.

4.Nc3 g6 5.e3 Bg7 6.Bb2 0-0 7.Nf3 Nbd7 8.d4 ed4 9.Nd4 Re8 10.Be2 Ne5 11.h3 a6 12.0-0 d5 (12...a5!?=) 13.cd5+= Nd5 14.Nd5 Qd5 15.Qc2 Nc6 16.Nc6 (16.Bf3 Nd4 17.Bd4+/– (17.Bd5 Nc2 18.Bg7 Kg7–/+; 17.ed4?! Qd8=)) 16...Bb2? (better is 16...Bf5!? 17.Qc1 Bb2 18.Qb2 Qc6+=) 17.Bf3+- Qf3 (better is 17...Qe6!? 18.Qb2 bc6+-) 18.gf3 Ba1 19.Ra1 bc6 20.h4 h5 (20...Bb7 21.Rd1+-) 21.Qc6 Be6 22.Qc7 Rec8 23.Qe5 Rc4 24.Rd1 Rac8 25.Rd6 Rc1 26.Kh2 Bc4 27.f4 Bb5 (27...Rc2 28.Kg2 Kh7 29.f5+-) 28.f5 R1c4 29.fg6 Rh4 30.Kg3 Rg4 31.Kh3 Re8 (31...Rf8 32.Qh5 Bf1 33.Kh2 Rg2 34.Kh1 Rg6 35.Rg6 fg6 36.Qg6 Kh8+-) 32.gf7 Kf7 (32...Kf8 33.Qh8 Kf7 34.Qh5 Ke7 35.Qe5 Kf7 36.Qf5 Kg7 37.Qg4 Kh7 38.Qg6 Kh8 39.Qh6 Kg8 40.Rg6 Kf7 41.Qg7) 33.Qh5 Ke7 34.Qe5 Kf7 35.Qf5 (35.Kg4?! Re5 36.a4 Ke7+=) 35...Ke7 (35...Kg8 36.Qg4 Kh7 37.Qg6 Kh8 38.Qh6 Kg8 39.Rg6 Kf7 40.Qg7) 36.Qf6 1–0. Steffens,Olaf (2200) – Guy,D (1965), Penarth WLS, 2013.

4.Nc3 g6 5.e3 Bg7 6.Bb2 Nc6 7.Nf3 Bf5 8.b5 Ne7 9.Be2 0-0 10.0-0 a6 11.a4 Re8.

4.Nc3 g6 5.e3 Bg7 6.Bb2 Qe7 7.Nf3 0-0 8.Nd5 Nd5 9.cd5 Nd7 10.Qb3 Nb6 11.h4 Bg4.

4.Nc3 g6 5.e3 Bg7 6.Be2 0-0 (6...a5 7.Bb2 0-0 8.Nf3 e4 9.Nd4 Nc6 10.Nc6 bc6 11.0-0 Bf5; 6...Qe7 7.Nf3 0-0 8.d3 a5 9.Bd2 e4 10.Nd4 c5 11.bc5 dc5; 6...e4 7.Nh3 Nc6 8.Nf4 0-0 9.Bb2 Ne5 10.Qc2 Bf5 11.h4 a5) 7.Bb2 Nc6 8.b5 Na5 9.Qa4 c5 10.d3 e4 11.Rd1 a6.

4.Nc3 g6 5.e3 Bg7 6.Nf3 e4 (6...0-0 7.Ng5 Nc6 8.Bb2 Bf5 9.b5 Ne7 10.e4 Bd7 11.Be2 a6; 6...Qe7 7.Nd5 Nd5 8.cd5 0-0 9.Bb2 Nd7 10.Qb3 Nb6 11.Be2 Bf5) 7.Nd4 0-0 8.f3 ef3 9.Qf3 Ng4 10.h3 Ne5 11.Qf4 c5.

4.Nc3 g6 5.e3 Bg7 6.Nh3 0-0 (6...Bf5 7.Be2 0-0 8.0-0 Nc6 9.Bb2 Qd7 10.b5 Ne7 11.Ng5 h6; 6...Nc6 7.Be2 0-0 8.Bb2 Bh3 9.gh3 Qd7 10.Nd5 Nd5 11.cd5 Ne7; 6...Qe7 7.Be2 0-0 8.Bb2 a5 9.0-0 Bh3 10.gh3 Qe6 11.h4 Nc6; 6...a5 7.Bb2 0-0 8.Be2 Qe7 9.0-0 Bh3 10.gh3 Qe6 11.h4 Nc6) 7.Bb2 Nc6 8.Be2 d5 9.cd5 Nd5 10.b5 Nce7 11.Ng5 h6.

4.Nc3 g6 5.e3 Bh6 A) 6.Bb2 0-0 (6...Qe7 7.h4 Be6 8.Nf3 0-0 9.Ng5 Bf5 10.Be2 a6 11.0-0 Nbd7; 6...Nc6 7.Bd3 0-0 8.Nf3 Qe7 9.Qc2 Re8 10.Nd5 Qd8 11.0-0 Bg7) 7.Be2 Nc6 8.d3 a5 9.b5 Ne7 10.Nf3 Qd7 11.0-0 b6; B) 6.Bd3 0-0 (6...Qe7 7.Nge2 e4 8.Bc2 0-0 9.Bb2 Nc6 10.Ng3 Be6 11.Qe2 a5) 7.Nf3 Re8 8.Ne4 Nbd7 9.0-0 Ne4 10.Be4 Nf6 11.d3 c6.

4.Nc3 g6 5.Nf3 Be6=.

4.Nc3 g6 5.Nf3 Bg7 A) 6.e4 a5 (6...0-0 7.Bb2 Nc6 8.Be2 a5 9.b5 Nd4 10.0-0 Bd7 11.h3 Re8; 6...Nc6 7.Be2 0-0 8.0-0 Bg4 9.d3 a5 10.b5 Nd4 11.Be3 Bf3) 7.Bb2 0-0 8.Be2 Nc6 9.b5 Nd4 10.0-0 Bd7 11.h3 Re8; B) 6.Bb2 0-0 (6...Nc6 7.b5 Nd4 8.e3 Ne6 9.Be2 e4 10.Nd4 Nd4 11.ed4 0-0) 7.e4 Nc6 8.Be2 a5 9.b5 Nd4 10.0-0 Bd7 11.h3 Re8; C) 6.e3 0-0 (6...e4 7.Nd4 0-0 8.Be2 c5 9.Nb3 Qe7 10.0-0 Nc6 11.Bb2 Ne5) 7.Be2 e4 8.Nd4 c5 9.Nb3 Qe7 10.0-0 Nc6 11.Bb2 Ne5; D) 6.g3 e4 (6...0-0 7.Bg2 e4 8.Nd4 Ng4 9.Nc2 Re8 10.0-0 Nc6 11.Rb1 f5; 6...Nc6 7.Bg2 0-0 8.0-0 Bg4 9.Ng5 h6 10.Nge4 Rb8 11.d3 Nd4; 6...a5 7.Bb2 0-0 8.Bg2 Nc6 9.b5 Nd4 10.0-0 Bg4 11.e3 Nf3; 6...Bg4 7.Bg2 0-0 8.h3 Bd7 9.d3 Nc6 10.Be3 Qc8 11.Kd2 e4) 7.Nd4 0-0 8.Bg2 Ng4 9.Nc2 Nc6 10.Be4 Be6 11.Bd5 Bc3; E) 6.d3 0-0 7.Bg5 h6 8.Bf6 Bf6 9.Qd2 Nc6 10.e3 a5 11.b5 Ne7.

4.Nc3 g6 5.g3 A) 5...Nc6 A1) 6.Bg2 Bg7 (6...Bh6 7.d3 Bc1 8.Rc1 0-0 9.Nf3 Bg4 10.0-0 Rb8 11.e3 a6) 7.Nf3 e4 8.Ng5 Bf5 9.0-0 0-0 10.b5 Ne5 11.Nce4 Ne4; A2) 6.b5 Nd4 7.Bg2 Bg7 8.e3 Ne6 9.Nge2 0-0 10.d4 a6 11.a4 ab5; A3) 6.Nf3 Bg7 (6...Bd7 7.Bg2 Bg7 8.d3 0-0 9.Bd2 Re8 10.b5 Nd4 11.0-0 Bg4; 6...Bf5 7.Bg2 Bg7 8.Nh4 Bd7 9.b5 Na5 10.d3 0-0 11.0-0 a6; 6...e4 7.Ng5 Bg7 8.Bg2 Bf5 9.0-0 0-0 10.Ra2 Re8 11.d4 ed3) 7.Bg2 0-0 8.0-0 Bg4 9.Ng5 Qc8 10.Bb2 h6 11.Nge4 Nd4; B) 5...Bg7 6.Bg2 Nc6 (6...0-0 7.Nf3 e4 8.Nd4 Ng4 9.e3 Bd4 10.ed4 Qf6 11.0-0 Qd4) 7.b5 Nd4 8.e3 Ne6 9.Nge2 0-0 10.Bb2 a6 11.0-0 ab5; C) 5...Be6 6.Bg2 (6.Bh3 Bh3 7.Nh3 Be7 8.0-0 0-0 9.Ng5 Nc6 10.b5 Nd4 11.e3 Ne6) 6...Nc6 (6...a5 7.b5 Qc8 8.Nf3 Nbd7 9.0-0 Bc4 10.d3 Be6 11.Ng5 Nc5; 6...Qc8 7.Nf3 Nc6 8.Ng5 Bf5 9.Qa4 Bd7 10.b5 Nd4 11.e3 Ne6; 6...d5 7.Qa4 c6 8.cd5 Nd5 9.Bb2 Nc3 10.dc3 Nd7 11.Rd1 Be7) 7.b5 Na5 8.Qa4 c6 9.bc6 bc6 10.Rb1 Nd7 11.d3 Nc5; D) 5...Be7 D1) 6.Bg2 0-0 (6...Nc6 7.Nf3 0-0 8.0-0 Be6 9.Ng5 Bd7 10.Bb2 Ng4 11.Nf3 a6; 6...c5 7.Nf3 Nc6 8.0-0 0-0 9.d3 Bf5 10.Qa4 Qd7 11.Bd2 a6) 7.Nf3 Nc6 8.0-0 Be6 9.Ng5 Bd7 10.Bb2 a6 11.Nge4 Bg4; D2) 6.Nf3 0-0 (6...Nc6 7.Bg2 0-0 8.0-0 Bg4 9.d3 a5 10.b5 Nd4 11.Nd4 ed4; 6...Bg4 7.Bg2 0-0 8.d3 Nc6 9.0-0 Qd7 10.Be3 a6 11.d4 ed4; 6...Be6 7.Bg2 0-0 8.Ng5 Bc8 9.0-0 Nc6 10.b5 Nd4 11.Bb2 Ng4; 6...a5 7.b5 0-0 8.Bg2 Nbd7 9.0-0 Nc5 10.d4 ed4 11.Nd4 Ng4) 7.Bg2 Nc6 8.0-0 Bf5 9.d4 Ne4 10.Nd5 Bf6 11.b5 Nd4; E) 5...Bh6 E1) 6.Bg2 Nc6 (6...0-0 7.Nf3 Nc6 8.d3 Bc1 9.Rc1 Bg4 10.0-0 Qd7 11.Nd5 Nd5; 6...a6 7.Nf3 Nc6 8.d4 Bc1 9.Rc1 0-0 10.0-0 Bg4 11.d5 Bf3) 7.d3 Bc1 8.Rc1 0-0 9.Nf3 Qe7 10.0-0 Bg4 11.Qd2 a6; E2) 6.Nf3 Nc6 (6...0-0 7.Bg2 a5 8.b5 Bg4 9.0-0 Nbd7 10.d4 Bc1 11.Rc1 Qe7; 6...Bg4 7.Bg2 Nc6 8.0-0 0-0 9.d3 Bc1 10.Rc1 a5 11.b5 Nd4; 6...Be6 7.d4 Bc1 8.Rc1 Nbd7 9.Bg2 0-0 10.de5 de5 11.0-0 Bc4) 7.Bg2 e4 8.Nh4 0-0 9.0-0 Bg7 10.d4 ed3 11.ed3 Re8.

4.e3 c6 5.Bb2 Be7 6.Ne2 (6.d4 e4=) 6...0-0=+ 7.Ng3 Be6 (7...Re8 8.Be2=) 8.d3 (8.d4 a5=+) 8...g6 (8...a5 9.Be2=+) 9.Be2= Nbd7 (9...h5 10.0-0=) 10.Nd2 (10.0-0 d5=) 10...b5 (10...a5 11.0-0=) 11.cb5 (11.0-0 a5=) 11...cb5 12.d4 a6 (12...a5 13.0-0=) 13.de5 (13.0-0 Qb8+=) 13...de5= 14.0-0 Rc8 (14...Qb6 15.Nf3 Rfd8 16.Bd3=) 15.Nde4 (15.Nf3 Qc7=) 15...Ne4 16.Ne4 Nb6 (better 16...f5!? 17.Nd2 Qb6=) 17.Be5+- Qd1 (17...f5 18.Nd6 Bd6 19.Bd6+-) 18.Rfd1 f5 (18...Bc4 19.Bf3+-) 19.Ng3 (19.Nc5 Bc5 20.bc5 Na4+-) 19...Rfd8 (19...Nc4 20.Bd4+=) 20.Rd8+- Bd8 21.Bd4 Rc2 (21...Nc4 22.Bf3 Rc7 23.Ne2+-) 22.Bd3 (22.Bd1 Rc6+-) 22...Rd2+= 23.Bf1 Kf7 24.Rc1 (24.Bb6 Bb6 25.a4 Rb2 26.ab5 ab5+=) 24...Nc4 25.a4 Bf6 (25...Be7 26.ab5 ab5 27.Bc3+-) 26.Bf6 (26.ab5!? ab5 27.Ne2+-) 26...Kf6= 27.e4 (27.ab5 ab5 28.Rb1 Ra2=) 27...f4 (27...Rb2!?=+) 28.Ne2+= g5 (28...Ke5 29.Nc3 Rb2 30.ab5 ab5 31.Nb5 Rb4+=) 29.f3 (better 29.ab5!? ab5 30.Nc3+=) 29...Rb2=+ 30.ab5 ab5 31.Nd4 Rb4 32.Ne6 (32.Ra1 Bd7=+) 32...Ke6 33.h3 (33.Bc4 bc4 34.Rc2 Ke5=+) 33...Ne3–/+ 34.Be2 Rb2 35.Bf1? (better 35.Kf2 b4 36.Rc6 Kd7 37.Rh6–/+) 35...b4–+ 36.Rc6 (36.h4 gh4 37.Ra1 b3–+) 36...Ke5 37.Rh6 (37.Rc5 Kd4 38.Rc1–+) 37...Rb1 38.Rh7 (38.Kf2 Rf1 39.Ke2 Rb1 40.Rh7 b3 41.Re7 Kd6–+) 38...Rf1 39.Kh2 b3 40.Rh5 (40.Rg7 b2 41.Rg5 Kd4–+) 40...b2 41.Rg5 Kf6 42.Rb5 b1Q 43.Rb1 Rb1 44.h4 Rb2 45.h5 (45.e5 Ke6 46.h5 Nf1 47.Kh1 Ng3 48.Kh2 Rb1 49.Kh3 Kf5 50.h6 Rh1) 45...Rg2 (45...Nf1 46.Kh1 Ng3 47.Kh2 Rb1 48.Kh3 Kg5 49.h6 Rh1) 46.Kh3 Kg5 47.h6 (47.e5 Rf2 48.e6 Nf1 49.e7 Rh2) 47...Rg3 (47...Rf2 48.h7 Nf1 49.h8Q Rh2) 48.Kh2 Kh6 (48...Nf1 49.Kh1 Nd2 50.e5 Nf3 51.h7 Rg1) 49.Kh1 Rf3 (49...Nc2 50.e5 Nd4 51.e6 Nf3 52.e7 Rg1) 50.e5 (50.Kg1 Rf1 51.Kh2 Ng4 52.Kg2 Rf2 53.Kg1 f3 54.e5 Rd2 55.Kf1 Rd1) 50...Rg3 51.Kh2 (51.e6 f3 52.e7 f2 53.Kh2 Nf1 54.Kh1 Rg1) 51...Rg5 (51...Ng4 52.Kh1 f3 53.e6 Nf2 54.Kh2 Rg2) 52.e6 Nd5 (52...Nf1 53.Kh1 f3 54.e7 Rg2 55.e8Q Ng3) 53.Kh3 (53.e7 Ne7 54.Kh3 f3 55.Kh4 f2 56.Kh3 f1Q 57.Kh4 Nf5) 53...f3 54.e7 (54.Kh4 f2 55.e7 f1Q 56.e8Q Qh1) 54...Ne7 (54...f2 55.Kh4 f1Q 56.e8Q Qh1) 55.Kh4 f2 56.Kh3 f1Q 57.Kh2 (57.Kh4 Nf5) 57…Qg2 0–1. dbinc007 – rilke, gameknot.com, 2018.

4.Bb2 Bg7 (--> 2.a3 g6 3.Bb2 Bg7 4.c4 d6).

4.Nc3 Nc6=.

4.Nc3 Be6 5.e4 Nc6 6.Nf3 Bg4 7.h3 Bf3= 8.Qf3 Nd4 9.Qd1 f6 10.d3 Qd7 11.Ne2+= 0-0-0 12.Nd4 ed4 13.Be2 Kb8 14.0-0+/– h5 15.Bb2 c5 16.bc5 dc5+= 17.Rb1 b6 18.Qd2 Qc7 19.a4+/– a5 20.Rfe1 Qe5 21.Ba3 Bd6? 22.g3 h4?? 23.Qa5 Bc7 24.Bc5 Kc8 25.Qa8 Kd7+/– 26.Qd5 Qd5=+ 27.ed5 bc5–/+ 28.g4 Ra8 29.Rb5 Ra4 30.Rc5 Ne7 31.Bd1 Ra3 32.Rc7 Kc7 33.Re7 Kd8 34.Re6 Rd3–+ 35.Be2 Rc3 36.Rf6 Rc1 37.Kg2+= Re8 38.Bf1 Ree1= 39.Bd3 Rg1 40.Kf3+/– Rc3? 41.Ke2?? Rcc1 42.Rg6 Rge1= 43.Kf3 Rcd1?? 44.Be4 Rc1 45.Rc6?? Rc3= 46.Kf4 Re2 47.f3 Rh2? 48.g5 d3 49.Bd3?? Rd3= 50.Kg4 Rd4 51.f4= Rf2 52.Kh4 Rff4=+ 53.Kh5? Rh4 54.Kg6–/+ Rc4 55.Kg7? Rc6 56.dc6 Kc7?? 57.g6–/+ Rh3 58.Kg8 Rg3 59.g7 Kc6 60.Kf8 Rg7 61.Kg7 Kd5 ½–½. gdraper (2035) – sburritt, net–chess.com, 2006.

4.Nc3 Bg7 5.e3 Ne7 6.Be2 0-0 7.h4 a5 8.b5 Nd7 9.d4 c6 10.Nf3 Nf5 11.g3 Qe7 12.0-0 Nf6 13.a4 ed4 14.ed4 Rd8 15.Re1= h5 16.Bg5 Qf8 17.Bf1 Re8 18.Qd2 Bd7 19.Bg2 Ng4 20.Rad1 Kh7 21.Re4 Nf6 22.Bf6 Bf6 23.Rde1 Kg8 24.Re8 Be8 25.Bh3 Bd7 26.Ne4 Bg7 27.Kh2 Kh8 28.Neg5 Kg8 29.bc6 bc6 30.c5 dc5 31.dc5 Ra7 32.Ne4 Qb8 33.Bf5 Bf5 34.Nd6 Be6 35.Ng5 Qb4 36.Qc1 Bb2=+ 37.Qd1 Qc5 38.Re2 Bg7 39.Ne6 fe6 40.Ne4 Qd4 41.Qb3 Re7= 42.Qb8 Bf8 ½–½. Bulcourf,Carlos (2210) – Montoro,Gustavo E, Villa Ballester op, 1992.

4.e3 Nc6 5.Nf3 =+.

4.Nf3 Nc6=.

5.Bb2 Nf6=+ 6.Be2 0-0 7.Nf3 e4 8.Nd4 c5 9.Nb3 Qe7 10.Nc3 Re8 11.Qb1 Bf5 12.0-0 Nc6 13.h3 cb4 14.ab4 Nb4 15.Nd4 Bc8 16.f3 a5 17.fe4 Ne4 18.Ne4 Qe4 19.Nb5 Qb1 20.Rab1 Rd8 21.Bf6 Bf6 22.Rf6 Bf5 23.Rf1 Ra6 24.g4 Kg7 25.g5 d5 26.Ra6 ba6 27.Nd4 Bh3 28.Ra1 dc4 29.Ra5 Rd5 30.Rd5 Nd5 31.Bc4 Nc7 32.Kh2 Bd7 33.Kg3 f6 34.Nf3 a5 35.d4 Be6 36.Be6 Ne6 37.gf6 Kf6 38.Nd2 a4 39.Nc4 h5 40.Na3 Kf5 41.Kf2 Ke4 42.Nb1 Kd3 43.d5 Ng5 (44.Kg2 Ne4–+) 0–1. Luzuriaga,Norberto Horacio (2350) – Johansen,John Martin (2345), corr W–Cup12 Gr079, 2000.

5.Bb2 Nf6 6.Ne2 0-0 7.g3 Bd7 8.Bg2= Bc6 9.f3 b6 10.0-0 Nbd7 11.Nbc3 a5 12.b5+= Bb7 13.a4 Nc5 14.d4+= Ne6 15.de5 de5= ½–½. Gapp,Wolfgang (1855) – Wallis,Toni (1965), AUT–chT, 1996.

5.Bb2 Nf6 6.Nf3 0-0 7.Be2 Re8 8.Nc3 b6 9.d4 ed4 10.Nd4 Bb7 11.Bf3 Bf3 12.Qf3 Na6 13.Nc6 Qd7 14.Rb1 Qe6 15.Nd5 Nd5 16.cd5+/– Qe4 17.Qe4 Re4 18.Bg7 Kg7 19.Rc1 Ree8 20.Rc4 f5 21.Kd2 Kf6 22.Rhc1 h5 23.Kd3 g5 24.h4+- g4 25.Rf4 Kg6 26.g3 b5+/– 27.Rc2 Kf6 28.Nd4 Re5+- 29.e4 Kg6 30.Rf5 Rf5 31.ef5 Kf6 32.Rc5 dc5–+ (33.Nb5 cb4 34.ab4 c6 35.dc6 Nb4 36.Ke4 Re8 37.Kd4 Nc6 38.Kc5 Ne7 39.Na7 Nf5–+; 32...Nc5?! 33.bc5 a6 34.c6=+) 0–1. Luzuriaga,Norberto Horacio – Wantoch_Rekowski,Jacek, corr or01–006 E–mail, 2002.

5.Bb2 Nf6 6.Nf3 e4 7.Nd4 c5=.

5.d4 Nc6 6.Nf3 Bg4=.

5.d4 Nf6=.

4.Qd4 Nc6 5.Qd3 Nf6 6.g3 Be7 7.Bg2 0-0 8.Nf3= Ne5 9.Ne5 de5 10.Bb2 Qd3 11.cd3 Bd6 12.Nd2 c6 13.Nc4+/– Bc7 14.Ne5 Be6 15.0-0 Be5 16.Be5 Nd7 17.Bd6 Rfe8+- 18.f4 Nb6 19.e4 Rad8 20.e5 Nd5 21.Bd5 Bd5+/– 22.d4 ½–½. nay (2190) – tomy (2260), net–chess.com, 2006.

4.Nf3= c5 5.e3 de3 6.Be3 Nc6 7.Bb5 d5=.

4.Nf3= Nc6 5.Bb2 Nge7 6.Nbd2 a6 7.Nb3 d3=.

4.Nf3= Be7 5.Nd4 Nf6 6.e3 c5 7.Nf3 0-0=.

4.Nf3= Nf6 5.Nd4 c5 6.Nb3 Nc6 7.b5 Na5=.

4.c4 a6 5.Nc3 Nf6 6.Nf3 Be7 7.d4 Bg4 8.c5 ed4 9.ed4 0-0 10.Be2=+ dc5 11.dc5 Qe8 12.Bf4 Rd8 13.Qc2 Nd5 14.Nd5= Rd5 15.Ng5?? Bg5–+ 16.Bg5 Rg5 17.f3 Bf5 18.Qd2 Nd4! 19.Ra2 Nc2! 20.Rc2 Bc2?? 21.Qc2?? Re5 22.Kf2 Qe7 23.Re1? Re8 24.Qc4 b5 25.cb6 cb6 26.Qa6 Qe6 27.Bc4–/+ Qd6 28.Re5 Qe5 29.Be2 Qe3 30.Kf1 h6 31.Qc4 Qa3 32.Qc6 Qa1 33.Kf2 Qd4 34.Ke1 0–1. rommeltdf (1655) – nhathuy (1805), net–chess.com, 2002.

4.c4 Nf6 5.Bb2 Be7 6.d4 a5 7.Nf3 e4 8.Nfd2 ab4 9.ab4 Ra1=+ 10.Ba1 Nb4 11.Qa4+/– Nc6 12.d5 Bd7 13.dc6 Bc6 14.Qc2 0-0 15.Nc3 Qa8 16.Bb2 d5 17.cd5+- Nd5 18.Nd5 Bd5 19.Qc7 Bb4 20.Qe5 Bd2 21.Kd2 Qa5 22.Qc3 Qc3 23.Bc3 Rd8 24.Bd4 Rb8 25.Bb5 Ra8 26.Ra1 Rc8 27.Ra5 Be6 28.Ba4 h6 29.Ra7 Rb8 30.Be5 Rd8 31.Ke1 Rd3? 32.Rb7 Ra3 33.Bc6 Rd3 34.Be4 Rd8 35.Rb8 Rb8 (36.Bb8 f5+-). mgriffin (1870) – nhathuy, net–chess.com, 2001.

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

4.c4 a5 5.b5 =+.

4.c4 f5 5.Bb2 Nf6 6.Nc3 Be7 (6...Nc6 7.Nf3=) 7.Nf3 Ne4 (7...0-0 8.d4 a5 9.de5 de5 10.Qd8 Rd8 11.Nb5+= (< 11.Ne5 ab4 12.ab4 Ra1 13.Ba1 Bb4=+)) 8.Qc2 (8.d4 Nc3 9.Bc3 e4+=) 8...Nc3= 9.Bc3 Nd7 (9...Bf6!?=) 10.d4+/– e4 (10...a5 11.d5 Bf7 12.Qf5 ab4 13.ab4 Ra1 14.Ba1+=) 11.d5 ef3 (11...Bf7 12.Nd4 (12.Bg7?! Rg8 13.Nd4 Rg7 14.Nf5 Rg4=) 12...0-0 13.Nf5+/–) 12.de6 Nf6 13.gf3 (13.Qf5 fg2 14.Bg2 c6+/–) 13...g6 14.c5 (14.Bg2 c6+/–) 14...d5 (14...dc5 15.Rd1 Qc8 16.Bf6 Bf6 17.Qc5+/–) 15.0-0-0 (15.Rd1 Qc8 16.c6 0-0 17.cb7 Qb7+/–) 15...c6 (15...0-0!?+/–) 16.e4+- fe4 17.fe4 0-0 18.ed5 Nd5 19.Rg1 Bg5+= 20.Bd2 Bd2= 21.Rd2 Qf6 22.Qb2 Rae8 23.Bc4 Qb2 24.Kb2+= Re6 25.Rgd1 h5 26.Rd5 cd5 27.Bd5 Rf2 28.Kb3 Rfe2 29.Be6 Re6 30.Rd7 b6 31.Ra7 bc5 32.bc5 h4 33.Kc4 h3 34.Kd3 g5 35.Ra4 Kf7 36.Rc4 Ke7 37.Re4 Re4 38.Ke4 Kd7 39.Kf5 Kc6 40.Kg5 (40...Kd7 41.Kg4+-) 1–0. Dillimann,H – Ostertag,R, Augsburg, 1998.

4.c4 f5 5.Bb2 Nf6 6.Nc3 Be7 (6...a5 7.d4=) 7.Nf3 Ne4 (7...0-0 8.d4 a5 9.de5 de5 10.Qd8 (< 10.Ne5 ab4 11.ab4 Ra1 12.Ba1 Bb4=+) 10...Rd8 11.Nb5+= (< 11.Ne5 ab4 12.ab4 Ra1 13.Ba1 Bb4–/+)) 8.d4 Nc3 9.Bc3 e4 10.Nd2 (10.d5 ef3 11.de6 Bf6=) 10...0-0 (10...d5 11.Be2=) 11.d5+= Bf7 12.Qc2 (12.Be2 Bf6 13.Bf6 Qf6=) 12...Bg6 (12...Bf6 13.Be2=) 13.Nb3 f4 14.0-0-0 (14.Nd4 fe3 15.fe3 Rf7+=) 14...Bf6 (14...fe3 15.fe3 Bg5 16.Re1=) 15.Nd4= Bd4 16.Bd4 c6 (16...fe3 17.Be3 a5 18.b5=) 17.Qb2 (17.dc6 Nc6 18.Bc5 Qf6 (< 18...dc5 19.Rd8 Rad8 20.b5=) 19.Bd6 fe3 20.Bf8 Rf8 21.fe3 Qa1 22.Qb1 Qa3 23.Qb2 Qe3 24.Qd2 Qa3 25.Qb2 Qb2 26.Kb2 Nb4=+) 17...Rf7 (17...Qc7 18.Kd2=) 18.dc6 (18.ef4 Rf4 19.Bg7 Qg5–/+) 18...Nc6=+ 19.Bc3 (better is 19.Bc5 Rd7 20.Bd4=+) 19...Rd7 (19...fe3 20.fe3 Bh5 21.Rd5=+) 20.Kb1 (20.ef4 Rc8+=) 20...Rc8 (20...fe3 21.fe3 Qc7 22.Be2=) 21.Ka1 Ne5=+ 22.Be5 de5 23.Be2 f3 24.gf3+= ef3 25.Bf3 Rd1 26.Rd1 Qe7 27.c5 h6 28.Qd2 Rc7 29.Qd6 Kh7 30.h4 h5 31.Rd5?? Qf7= 32.Bd1 Qf5–/+ 33.Kb2 Qb1 34.Kc3 Qc1 35.Kb3= b5 36.Qe5 Rf7 37.Qc3+- Qb1 38.Qb2 Qe4 39.Rd4 Qe6 40.Kc3 Rd7 41.Bb3 Qc6 42.Qd2 Qf6 43.Bc2 Rd4 44.Bg6 Kg6 45.ed4 Qe6 46.Qd3 Kf7 47.Qe3 Qa2 48.Qf4 Kg8 49.Qb8 Kh7 50.Qb5 Qa1? 51.Kd2 Qb2 52.Ke3 Qc1 53.Ke4 Qh1 54.Ke5 Qh4 55.Qd3 Kh6 56.Qe3 g5 57.Kf6 Qg4 58.f3 Qg3 59.Qe4 (59...Qf4 60.Qf4 gf4 61.c6 Kh7 62.c7 Kg8 63.c8Q Kh7 64.Qd7 Kh6 65.Qg7) 1–0. Campos Calvo_Sotelo,Juan (2085) – Alonso Igual,Ignacio (1895), Open seniores, 2006.

4.c4 f5 5.Bb2 Nf6 6.Nf3 Bd7=.

4.c4 f5 5.d4 a5=.

4.c4 Nf6 5.Nf3 Nbd7 (5...a5 6.b5=) 6.Bb2 Be7 7.d4 e4 (7...0-0 8.Nc3=) 8.Nfd2= Bg4 (8...c5!?=) 9.Be2+= Be2 10.Qe2 0-0 (10...c6 11.Nc3+=) 11.Nc3+- c5 (11...Nb6 12.0-0+-) 12.0-0 b6 (12...cd4 13.ed4 Re8 14.Nde4 Ne4 15.Ne4+=) 13.Nce4 Ne4 14.Ne4 f5 15.Nc3 Bf6 (15...Nf6 16.Rfd1+-) 16.Nd5 (16.Qf3 Be7+-) 16...a5 (16...Rc8 17.f3+-) 17.b5 (17.Qd3 g6+-) 17...Ra7 (17...cd4 18.ed4 Qe8 19.Qd2+-) 18.a4 (18.Rad1 Qc8+-) 18...cd4 (18...Qe8+-) 19.ed4 Re8 (19...Qe8 20.Qd3+-) 20.Qd3 Re4 21.f3 Rh4 (21...Re6 22.Qf5 Qe8 23.Nf4+-) 22.g3 Rh6 (22...Rh5 23.Rfe1+-) 23.Qf5 Nf8 (23...Qf8 24.Qe4+-) 24.Rae1 Rf7 25.Qc2 Ne6 (25...Ng6 26.Re4 Ne7 27.Qe2+-) 26.Nf6 (better 26.Re6 Bd4 27.Bd4 Re6 28.Bb6 Qf8+-) 26...Rhf6 27.d5 Ng5 (27...Nc5 28.Bf6 Rf6 29.Kg2+-) 28.Bf6 Qf6 (28...Rf6 29.f4 Nf7 30.Re6+-) 29.Qd3 (better 29.f4 Nh3 30.Kg2 Rf8+-) 29...Qb2 (29...Rf8 30.f4 Nf7+-) 30.Re8 Rf8 31.Rf8 Kf8 32.Qf5 Qf6 33.Qf6 (better 33.Qc8!? Kf7 34.h4 h5 35.hg5 Qe5+-) 33...gf6 34.h4 Nf7 35.Re1 Ne5 (35...Nd8+-) 36.Re5! fe5 (36...de5 37.c5 Combination; 36...fe5 37.Kf2 Combination) 37.g4 Kf7 38.Kf2 h6 39.Ke3 Kf6 40.Ke4 Kg6 41.c5! dc5 (41...bc5 42.b6 Passed pawn; 41...dc5 42.h5 Double attack (42.Ke5 Deflection)) 42.Ke5 Kf7 43.d6 c4 44.Kd4 Ke6 45.Kc4 (better 45.f4 Kd6 46.Kc4 Ke6+-) 45...Kd6 46.Kd4 Ke6 47.f4 White prepares g5 47...Kf6 48.Kd5 Ke7 49.Ke5 Kd7 (49...Kd8 50.f5 Ke8 51.Ke6 Kd8 52.f6 Kc8 53.f7 Kb7 54.f8Q h5 55.Kd5 hg4 56.Qg7 Kc8 57.Kc6 g3 58.Qc7) 50.f5 Ke7 (50...Kc8 51.f6 Kd8 52.g5 Kc7 53.gh6 Kc8 54.h7 Kb7 55.f7 Kc7 56.f8Q Kd7 57.h8Q Kc7 58.Qhg7) 51.g5 (51.g5 h5 52.g6 Kd7 53.f6 Kc7 54.f7 Kb8 55.f8Q Kc7 56.g7 Kd7 57.g8Q Kc7 58.Qgf7) 1–0. UncleBulgaria (2380) – Joust Anja (1885), ChessWorld.net, 2016.

4.d4= ed4 5.ed4 Nf6 6.Bb5 Nbd7 7.Nf3=.

4.d4 Be7=.

4.d4= Ne7 5.de5 de5 6.Qd8 Kd8 7.Bb2 (7.Nf3 f6=) 7...Ng6 (7...Nd7 8.Nf3=) 8.h4 (8.Nf3 f6=) 8...h5 (8...f6 9.Bd3=) 9.Bd3 Nd7 (9...c5 10.Bg6 fg6 11.Nf3 cb4 12.Ne5+=) 10.Nf3 Bd6 11.Bg6 (11.Ng5 Re8+=) 11...fg6 12.Ng5 Ke7 13.Nd2 (13.Nc3 a5 14.b5 Nb6=) 13...a5= 14.b5 b6 (14...c6 15.bc6 bc6 16.Nde4+=) 15.Ne6 Ke6 16.Ne4 Be7 17.Ke2 (17.Rd1 Rac8+=) 17...Nc5 (17...Rac8!?=) 18.Nc5+= Bc5 19.Rh3 Be7 20.f4 Bf6 21.fe5+/– Be5 22.Be5 Ke5 23.Rg3 Rh6 24.Rf1 Ke6 25.Rf4 Rc8 26.Rc4 c5 27.Re4 Kd6 28.c4 Rc7 29.Rg5 Rd7 30.g3 Kc7+/– 31.Re8 Rd8 32.Rge5 Re8+/– 33.Re8 Kd6 34.Rb8 Kc7 35.Rg8 Kd6 36.Kf3 g5 37.hg5 Rg6 38.Kf4 Ke6 39.Rd8 Ke7 40.Kf5 Rc6 41.Rg8 Rd6 42.Rg7 Kf8 43.Rb7 Rd3 44.Rb6 Re3 45.Rc6 Rg3 46.b6 Rb3 47.Kf6 Ke8 48.g6 Kd7 49.Rc5 Rb6 50.Kf7 Re6 51.Rd5 (51...Rd6 52.g7 Rd5 53.cd5+-) 1–0. Bulcourf,Carlos (2280) – Dilloo,Manuel, Buenos Aires CAA op, 1993.

4.Nf3 c6 5.Bb2 Nd7 6.d4 (6.Nc3 Be7=) 6...e4 7.Nfd2 d5 8.c4 f5 9.Nc3 (9.cd5 cd5 10.Nc3 Ngf6=) 9...Ngf6= 10.Qb3 Bd6 11.f3? (11.Be2 0-0=) 11...Qe7 (11...0-0!?–/+) 12.fe4+= fe4 13.g3 0-0 14.Be2 Bc7 15.0-0-0 (15.0-0 Nb6 16.cd5 Bf7+=) 15...a6 (15...Nb6 16.c5 Nbd7 17.Rdf1–+) 16.cd5 cd5 17.Na4 (17.g4 Nb6–/+) 17...b5 18.Nc5 Nc5 19.bc5 Rfb8 (19...Bh3 20.Rdg1–/+) 20.g4 a5 21.Bc3 (21.g5 Nd7 22.Rdg1 a4–/+) 21...b4 (21...Nd7!? 22.Rdf1 Nc5 23.dc5 d4–+) 22.ab4–/+ ab4 23.Bb2 Bd7 (23...h5 24.g5 Ng4 25.Rhg1–/+) 24.g5 Ba4 25.gf6 Bb3?? (better is 25...Qd8 26.Qd5 Qd5+=) 26.fe7+- Bd1 (26...Ba2 27.Rdf1 Re8 28.Rf2+-) 27.Bd1 (27.Rd1?! Re8+-; 27.Kd1?! Re8+-) 27...Ba5 (27...Kf7 28.Bb3 Ke6+-) 28.Bb3 Ra7 (28...Kf7 29.Bd5 Ke7+-) 29.Bd5 Kh8 30.Nc4 1–0. Pandurevic,Miro (2310) – Svetinovic,Darjan (1900), Open Osijek, 2010.

4.Bb2 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3).

4.c4 Nf6 5.Bb2 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 Nf6 5.c4).

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

4.c4 b6 5.Bb2 (5.d4=) 5...c5 (5...Be7 6.Be2=) 6.Be2 (better 6.Qf3!? d5 7.bc5+-) 6...Bb7= 7.Bf3 (7.Nf3 e4 8.Ng5 h6=) 7...Bf3 (7...e4 8.Be2=+) 8.Nf3 (8.Qf3 Nbd7=) 8...Be7 (8...e4 9.Ng5 h6 10.Nh3=) 9.Nc3 (9.d3 0-0+=) 9...0-0 (9...Nbd7 10.0-0=) 10.b5 (10.d3 a6+=) 10...a5 (10...a6 11.d3=) 11.Qc2 (11.0-0 Nbd7+=) 11...h6 (11...Qd7 12.0-0+=) 12.0-0-0 (12.e4 Qd7+=) 12...Ra7 (12...Qc8 13.Qd3+=) 13.Kb1 (13.h3 Nbd7+=) 13...Nbd7 (better 13...Qc8+=) 14.Nh4 (better 14.Qf5!?+=) 14...Ng4–/+ 15.Qf5 Bh4 (better 15...h5!? 16.g3 Bh4 17.gh4 g6=+) 16.Qg4+= Qg5 (16...Re8 17.Rdf1+=) 17.Qh3 (17.Qg5 Bg5 18.h4 Be7+=) 17...Qd8 (17...Qg6 18.d3 Bd8 19.f4+=) 18.g3 Be7 19.f4 ef4 (19...Bf6 20.Qf5+=) 20.gf4+- (worse 20.ef4 Nf6=) 20...Nf6 (20...Bf6!?+-) 21.Rhg1 Qd7? (better 21...Kh7+-) 22.Qh6 Qf5 23.Ka2 (23.e4 Qh7 24.Qh7 Kh7+-) 23...Qh7 24.Qh7 Kh7 25.Rg3 (25.Nd5 Rb7+-) 25...g6 26.Nd5 Nd5 (26...Nh5 27.Rh3 Rb8+-) 27.Rh3 (27.Rh3 Bh4 28.Rh4 Kg8 29.Rh8) 1–0. Campos Calvo_Sotelo,Juan (1895) – Sanchez Lucena,Juan, Madrid Spain, City ChampionshipSupervet, 2017.

4.c4 Be7 5.Qc2 0-0 6.Bb2 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7 5.c4 0-0 6.Qc2).

4.c4 Be7 5.Nf3 (5.d4 Nc6=+) 5...0-0 6.Nc3 (6.d3 a5 7.ba5 Nc6=+) 6...Re8 (6...e4 7.Nd4–/+) 7.Be2 (7.e4 a5 8.ba5 Nc6=+) 7...Bf8 (7...e4 8.Nd4=+) 8.d4 (8.0-0 e4 9.Nd4 c5=) 8...Nbd7 (8...e4 9.Nd2=) 9.Bb2 (9.0-0 e4 10.Nd2 a5=) 9...c6 (9...e4 10.Nd2=) 10.Qc2 (10.0-0 e4 11.Nd2 d5+=) 10...Qe7 (10...e4 11.Nd2 d5 12.cd5 cd5 13.Qb3=) 11.Rd1 (11.0-0 e4 12.Nd2 Qe6+=) 11...a6 (11...e4 12.Ng5=) 12.0-0+= e4 13.Nd2 d5 14.b5 (14.cd5 cd5 15.Rc1 Qe6=) 14...Qe6 (14...ab5 15.cb5 cb5 16.Nb5=) 15.a4 (15.bc6 bc6 16.c5 Be7=) 15...Bd6 (15...ab5 16.ab5 Bd6 17.c5+=) 16.Qb3 (16.c5 Bc7=) 16...Nf8 (16...ab5 17.ab5 Bc7 18.c5=) 17.Ba3 (17.c5 Bc7=) 17...Bb8 (17...Ba3 18.Qa3 ab5 19.cb5=) 18.Bf8 (18.bc6 bc6 19.Rb1 N8d7+=) 18...Rf8= 19.Rfe1 (19.bc6 Qd6 20.f4 ef3 21.Nf3 bc6=) 19...Qd6 20.Nf1 Bc7 (20...ab5 21.ab5 dc4 22.Bc4=) 21.Rb1 (21.c5 Qe6=) 21...Be6 22.b6 Bd8 23.c5 Qd7 24.Na2 Bg4 25.a5 g6 26.Nb4+= Be2 27.Re2 Re8 28.Qd1 Be7 29.Reb2 Bf8 30.Qe2 Nh5 31.Ng3 Ng7 32.Kf1 f5 33.Ke1 Ne6 34.Nf1 Bg7 35.Rc1 Rf8 36.g3 Bf6 37.Kd1 Kg7 38.Rd2 h5 39.Kc2 h4 40.Kb1 Rh8 41.Qd1 Ng5 42.Qb3 Nf3=+ 43.Rdc2 Rhd8 44.Ka2 g5 45.Ka3 Qe6 46.Ka2 Rd7 47.Rb2 Kg6 48.Qd1 Rh7 49.Qe2 Qd7 50.Qd1 Rah8 51.Rcb1 Qe6 52.Ka3 Ra8 53.Rc1 Rah8 (53...hg3 54.fg3 Rah8 55.Qe2=+) ½–½. Alberts,Hendrik Jan (2165) – Nowak,Ignacy (2400), Kiekrz op, 1995.

4.c4 Bg4 5.Be2 Be2 6.Ne2 =+.

4.c4 g6 5.Nc3 Bg7 6.Qc2 0-0 7.Nf3 Bg4 8.Be2 Nbd7 9.Bb2 Nb6 10.h4 c6 11.Ng5 Be2 12.Ne2 h6 13.Nf3 Ng4 (13...e4!? 14.Nfd4 c5 15.bc5 dc5+=) 14.h5 g5 15.Ng3 Qe7 16.Qe4 Qe6 17.Rc1 d5 18.cd5 cd5 (18...Nd5 19.Nf5 Ndf6 20.Ng7 Ne4 21.Ne6 fe6 A) worse is 22.Ne5 Ne5 (22...Ngf2 23.0-0+/–) 23.Be5 Nf2–/+ (23...Rf2?! 24.d3 Rf5 25.d4+=); B) 22.0-0 Nef2 B1) worse is 23.Rf2 Nf2 24.Kf2 e4–/+; B2) worse is 23.Ne5 Ne5 24.Be5 Nd3–/+; B3) 23.Be5? B31) worse is 23...Ne5 24.Ne5 (24.Rf2? Nd3 25.Rc4 Nf2 26.Kf2 a5–+) 24...Ne4 25.Nd7+=; B32) 23...Nd3 24.Bd6 Nc1 25.Rc1 Rfd8–+; B4) 23.Rc4=) 19.Qf5 Nc4 Black plans e4 20.Qb1 Rac8 21.d4 e4 22.Nh2 f5 23.Ng4 f4 24.Nh6 Bh6 25.Nf1 fe3 26.Ne3 Ne3 27.fe3 Qf5 28.Rc2 g4 29.Bc1 g3 30.Re2 Rc7 31.Bd2 Rfc8 32.Qb3?? (better is 32.b5+=) 32...Rc1!–+ 33.Bc1 Rc1 34.Kd2 Rh1 35.Qa4 (35.b5 Qh5 (worse is 35...Rh5 36.b6–+) 36.b6 ab6–+) 35...Qc8 (better is 35...Be3 36.Re3 Qf2 37.Re2 Qd4 38.Kc2 Qd1 39.Kc3 Qa4–+ (39...Qe2?! 40.Qe8 Kg7 41.Qe7 Kh6 42.Qf6 Kh5 43.Qf5 Kh4 44.Qf4 Qg4 45.Qh6 Qh5 46.Qf4 Qg4 47.Qh6 Qh5 48.Qf4 Qg4=)) 36.Qc2 Qc2 37.Kc2 Rh5 38.a4 Rf5 39.Kd1 Rf2 40.Ke1 Re2 (better is 40...Rf8!? 41.a5–+) 41.Ke2 Kf7 42.Kd2 Ke6 43.Ke2 a6 44.Kd2 Kd6 45.Ke2 Kc6 (better is 45...Kc7 46.Kd2 Kc6 47.Ke2–+) 46.Kd2 Bg5 47.Ke2 Be7 0–1. combijack (1750) – mischo (1665), gameknot.com, 2009.

4.d4 ed4 (4...e4 5.d5=+) 5.ed4 Be7 (5...a5 6.ba5 Be7 7.Bd3=) 6.Nf3 Bg4 7.h3 Bf3 (7...Bf5 8.Bd3 Bd3 9.Qd3=) 8.Qf3+= Nc6 (8...d5 9.Bd3+=) 9.Bb5 (better is 9.Be3+=) 9...a6? (better is 9...d5!?+=) 10.Bc6+- bc6 11.Qc6 Nd7 12.0-0 0-0 13.c4 Nf6 14.Nc3 Qd7 15.Nd5 Nd5?? 16.Qd7 Nc3 17.Qe7 Rae8 18.Qc7 Ne2 19.Kh2 Nd4 20.Qd6 Nb3 21.Rb1 Nc1 22.Rbc1 Rd8 23.Qb6 Ra8 24.Rfe1 Rfb8 25.Qa5 h6 26.Re7 Re8 27.Qd5 Re7 28.Qa8 Kh7 29.c5 (29...Rd7 30.c6+-) 1–0. marekt – shosan, ChessWorld.net, 2002.

4.Nf3 Be6 5.d3 Be7 6.Be2 Nbd7 7.Bb2 0-0 8.Nbd2 h6 9.0-0 c6 10.h3 Qc7 11.e4 Rad8 (11...d5 12.c4+=) 12.c4 a6 (12...d5 13.cd5 cd5 14.Rc1=) 13.Nb3 (13.d4 ed4 14.Nd4 d5+=) 13...b5 14.cb5 ab5 15.Rc1 c5 16.bc5 (16.d4!? Ne4 17.d5=) 16...dc5+= 17.Qd2?? (17.d4 Ne4 18.de5 c4+=) 17...c4 (better is 17...Bb3 18.Qc3 Be6–+) 18.dc4= bc4 19.Na1 (19.Qc2 Rb8 20.Nfd2 Rfc8 21.Bc4 Bc4 22.Nc4 Qc4 23.Qc4 Rc4 24.Rc4 Rb3 25.Rc8 Kh7–+) 19...c3 (better is 19...Ra8!?–/+) 20.Rc3 Qb7 21.Rb1? (21.Qc1 Ne4 (worse is 21...Qe4 22.Re3 Qa8 23.Ne5+=) 22.Rc2 Bd6=) 21...Rb8 (better is 21...Ne4!? 22.Qc2 Nc3 23.Bc3 Qc7–+) 22.Rc2 Ba3 23.Ba3 Qb1 24.Rc1 Qb6 25.Bf8 Nf8 (25...Ne4 26.Qc2 Qf2 27.Kh2–/+) 26.Nc2 Ng6 27.Ne3 Nf4 28.Nd5?? N6d5 29.ed5 Bd5 30.Bd1 e4?? 31.Qf4= g5?? 32.Ng5!+- hg5 33.Qg5 Qg6 34.Qg6 fg6+/– 35.Be2 Kh7 36.Bf1 Kh6 37.Bc4?? Bc4?? 38.Rc4+/– Rb1 39.Kh2 Rb2 40.Rc2?? Rc2–+ (40...Rc2 41.Kg1 Rc1 42.Kh2 Rf1–+) 0–1. Fournier,Frederic (1970) – cptnNEMO (1795), Active, 2007.

4.Nf3 g6 5.Bb2 Bg7 (5...e4 6.Nd4=) 6.c4 (6.d4 ed4 7.Bd4 Be6=) 6...0-0 (6...e4 7.Nd4=+) 7.d4= ed4 (7...e4 8.Nfd2=) 8.Nd4 Nc6 (8...Bg4 9.Be2 Be2 10.Qe2=) 9.Nc6 bc6 10.Bd3 (10.Qf3 Bd7+=) 10...a5 (10...Bg4 11.Qa4 Qe8 12.0-0+=) 11.0-0+= ab4 12.ab4 Ra1 13.Ba1 Be6 (13...Re8 14.Qf3+=) 14.Nd2 (14.Qf3 c5 15.bc5 Qa8+=) 14...Qe7 15.Qa4 (15.Qf3 Rb8+=) 15...d5 (15...Rb8 16.Bd4+=) 16.Bd4+= Rd8 (16...Rb8 17.Rb1+=) 17.c5 (17.Qc6 dc4 18.Bc4 Qb4 19.Be6 fe6 20.Qe6 Kf8 21.Bf6 Rd2+-) 17...Qe8 (17...Rb8 18.Ra1+=) 18.Ra1 Rb8 19.Nf3 h6 (19...Qe7 20.Qc6 Bg4 21.Ne5+-) 20.Ne5 Bd7 21.Qa7 (21.Qa5 Qe6+/–) 21...Qd8 22.Ra4 Bh8 23.f3 Bg7 24.Bf1 h5 25.Bd3 Be8 26.Qa6 Nh7 27.Nc6 Bc6 28.Qc6+- Bd4 29.ed4 Qg5 30.Be2 Qe3+= 31.Kf1 Re8 32.Ra2+/– Qc1 33.Kf2 Qe3 ½–½. Gross – Dziel,Jaromir, corr 3GMM–08, 1995.

4.h3 Be7 5.c4 (5.Bb2 Be6–/+) 5...0-0 6.Bb2 (6.d4 ed4 7.ed4 Re8=+) 6...Bf5 (6...Re8 7.Be2=+) 7.Nf3 (7.d3 Bg6=+) 7...Bb1 (7...a5 8.d4=+) 8.Rb1= c5 (8...e4!? 9.Nd4 a5=) 9.bc5+= dc5 (9...e4 10.cd6 Bd6 11.Nd4+=) 10.Ne5+/– b6 (10...Bd6!?+/–) 11.g3 Nbd7 12.Bg2 Rb8 (12...Ne5 13.Be5 Qd3 14.Ba8 Ra8 15.Bf6 Bf6 16.Qb3+-) 13.0-0 (better is 13.Nc6 Qe8 14.Nb8 Qb8 15.Qa4+-) 13...Ne5 14.Be5 Bd6 15.Bd6 Qd6+/– 16.d4 cd4 17.Qd4 Qa3= 18.Ra1 Qe7 19.Ra2 Nd7?? 20.Ra7+- Qc5 21.Rd7 Qd4 22.Rd4 b5 23.c5 b4 24.Rb1 Rfc8 25.Rbb4 Rb4 26.c6 Rb1 27.Kh2 Rc1 28.Rd7 h6 29.Bd5 Rc2 30.Bf7 Kf8 31.Kg2 R8c6+= 32.Bd5 Rc7 33.Rc7 Rd2 (34.e4 g6+-). thedesertfox (1920) – mminaev (1795), net–chess.com, 2005.

4.Bb2 Nf6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 g6).

4.c4 Bg7 5.Nc3 Nc6 6.e4 =+.

4.c4 Bg7 5.Nc3 Nf6 6.Bb2 0-0 7.Nf3 Nc6 8.Be2 b6 (8...e4 9.Nd4 Nd4 10.ed4+=) 9.h4 (9.b5 Na5+=) 9...Bg4 10.Ng5 Be2 11.Qe2 h6 12.Nge4 Ne4 13.Ne4 a6 14.0-0-0 b5 15.cb5 ab5 16.Qb5 Ne7 17.g4 c6 18.Qe2 Qc8 19.Nd6 Qc7 20.Ne4 f5 21.Nc5 Qc8 22.Rdg1 e4? (22...fg4!? 23.Qc4 Rf7 24.Rg4 Qf5+-) 23.gf5 Bb2 24.Kb2 Qf5 25.Qc4 Qd5 26.Qd5 cd5 (26...Nd5?? 27.Rg6 Kf7 28.Rc6+-) 27.Rg2 Nf5 (27...Rf3 28.d3 ed3 29.Nd3+-) 28.Rg6 Kh7 29.h5 Nd6 1–0. combijack (1775) – klossmajor, gameknot.com, 2009.

4.c4 Bg7 5.Nc3 Nf6 6.Be2 (6.e4 Be6=) 6...0-0 7.Nf3 (7.e4 a5 8.b5 Be6=) 7...Nbd7 (7...e4 8.Nd4=+) 8.d4 (8.e4 a5 9.Bb2 ab4 10.ab4 Ra1 11.Qa1 Nb6=) 8...e4 9.Nd2 Re8 (9...a5 10.0-0=) 10.Qc2 (10.0-0 c5+=) 10...Qe7 (10...c5 11.0-0=) 11.a4 (11.0-0 c5+=) 11...h5 (11...a5 12.Nd5 Nd5 13.cd5=+) 12.a5 (12.0-0 c5 13.bc5 dc5+=) 12...a6 (12...c5 13.bc5 dc5 14.0-0=) 13.Bb2 (13.0-0 c5 14.bc5 dc5+=) 13...Nf8 (13...c5 14.bc5 dc5 15.d5+=) 14.Rc1 (14.0-0 Bg4+/–) 14...Bg4 (14...d5 15.cd5 Qb4 16.0-0+/–) 15.h3 (15.Bg4!? hg4 16.0-0+/–) 15...Be2= 16.Ke2 (16.Ne2 d5=) 16...Rab8 17.b5 (17.Kf1 c5 18.bc5 dc5=) 17...Qd7 (17...ab5 18.cb5 d5 19.Ra1=) 18.ba6 (18.Nde4!? Ne4 19.Ne4 ab5 20.Nd2=) 18...ba6= 19.Ba3 (19.f3 ef3 20.Kf3 Qe6=) 19...h4 (19...Qc6 20.d5 Qd7 21.Nde4 Ne4 22.Ne4=) 20.Rb1 (20.Nde4 Ne4 21.Ne4 Qf5 22.Nd6 Qh5 23.Kf1 cd6 24.Bd6 Rb7=) 20...Qf5=+ 21.Rb8 Rb8 22.Rb1 Qh5 23.Ke1 Rb1–/+ 24.Qb1 Qa5 25.Bb4 Qb6 26.Ba3 Qa5 27.Bb4 Qg5 28.Kf1 Ne6 29.Nce4 Ne4 30.Qe4 c5 31.dc5 dc5 32.Ba5 Qf6 33.Qb1 Ng5 34.Ke2 Qc6 35.Qb8= Kh7 36.f3 Ne6 37.Qb3 Qd6 38.Qb7 Qe5 39.Qe4 Qf6 40.f4 Qa1 41.f5 gf5 42.Qh4 Kg8 43.Bd8 Qb2 44.Be7 f4 45.Bc5 Nc5–/+ 46.Qd8 Kh7 47.ef4 Ne6 48.Qd3 Kg8 49.Kf3 a5 50.c5? Nc5 51.Qd8–/+ Kh7 52.Nc4? Qc3 53.Ne3 Ne6 54.Qe8 Qf6 (55.Nd5 Qf5 56.Qg8 Kh6–+) 0–1. Bulcourf,Carlos (2185) – Scarella,Enrique Alejandro (2380), Lomas de Zamora op, 1995.

4.c4 Bg7 5.d4 Nc6=.

4.d4= ed4 5.ed4 Bg7 6.Nf3 Ne7 7.Be2 0-0 8.0-0 c5 (8...Re8 9.Re1+=) 9.c3 Nf5 (9...Re8 10.dc5 dc5 11.Qd8 Rd8 12.Bg5+=) 10.Ra2 (10.Re1 Qf6+=) 10...cd4= 11.cd4 d5 (11...Re8 12.Re1=) 12.Bf4 (12.Bg5 Qd6+=) 12...Nc6 13.Rd2 Qb6 14.Nc3 Be6 15.Na4 Qd8 16.b5 (16.Re1 Rc8+=) 16...Na5 17.Nc5 Re8 (17...Rc8 18.Ne6 fe6 19.Re1=) 18.Be5 (18.Rc2 Rc8 19.Ne6 Re6 20.Rc8 Qc8+=) 18...Rc8 (18...Qb6 19.Bg7 Kg7 20.Qa4+=) 19.Qa4 (19.Bg7 Kg7 20.Re1 Qb6+=) 19...b6 (19...Be5 20.Ne5 f6 21.Nf3+=) 20.Ne6+/– Re6 21.Bd3 (21.Rc2 Be5 22.de5 Rc2 23.Qc2 f6+=) 21...Nd6 (21...Nh4 22.Nh4 Qh4 23.Bg7 Kg7 24.Re2=) 22.Rc2 (22.Re2 Nac4+=) 22...Ndc4 (22...Rc2 23.Qc2 Ndc4 24.Qc3=) 23.Bg7 (23.Rfc1 Bf8+=) 23...Kg7 24.Qb4 (24.Rfc1 Qd6 25.Qb4 Rce8=) 24...Qe7 25.Qe7 Re7 26.Rfc1 (26.Nd2 f5=) ½–½. Luehrig,Walter – Lebel,Patrick, Orang–Utan Invitational, 2001.

4.d4= Bg7 5.Bb2=.

4.Nf3 Bg7 5.Nc3 e4=.

5.c4 Ne7 6.Nc3 Be6 7.Qc2 0-0 8.Nf3 h6 9.Be2 a6 10.h4 Nd7 11.h5 g5 12.d4 ed4 13.Nd4 Nb6 14.Ne6 fe6 15.Rd1 Qe8 16.Qe4 d5?? (better is 16...Qf7 17.0-0 d5 18.cd5 Ned5=) 17.Qe6+- Kh8? (better is 17...Rf7+-) 18.Nd5 Bb2 19.Ne7 (better is 19.Qh6 Kg8 20.Qg5 Kh8 21.Ne7 (worse is 21.Qe7 Nd5 22.Qe8 Rae8 23.cd5 Bc3 24.Kf1 Re3+-) 21...Bc3 22.Kf1+-) 19...Rf6+/– 20.Qe4 Ba3 21.Ng6 (21.Rb1!? c5 22.Bd3+-) 21...Kg7+= 22.Qb1 Qa4 23.0-0 Bb4 24.Qe4 Qc6 25.Qb1 Bd6 26.Bf3 Qc4 27.Rd4 Qb5 28.Bb7 Rb8 29.Be4 Qe8 30.Bf3 Nc4 31.Qa2 Ne5 32.Be4 Ng6 33.Bg6 Qe5 34.g3 Rbf8 35.Rg4 (35.Qa6?? Rf2 36.Rf4 Rf1 (36...gf4?! 37.Rf2 Qe3 38.Qd3–+; 36...R8f4?! 37.ef4 Rf1 38.Qf1 gf4 39.gf4 Qf4 40.Qf4 Bf4 41.Kf2+=; 36...R2f4?! 37.ef4 Qd4 38.Kg2–+) 37.Kf1 gf4 (37...Rf4?! 38.gf4 gf4 39.Qc4–/+) 38.ef4 Qe6–+) 35...a5 36.Kg2 Qb5 37.f4 Qc6 38.Kh3 Qc3 39.Qe2 a4 40.Rd1 a3 41.Rd2 Re6 42.Rd3 Qc1 43.Kg2 Rb8 (43...gf4?! 44.gf4 Kh8 45.f5+=) 44.Rd2? (44.Qd1 Rb2 45.Kh3 Qd1 46.Rd1 Re3 47.fg5 Rbb3 48.gh6 Kh6–+) 44...Rb3 (better is 44...Rg6 45.fg5 Rg5 46.Rg5 hg5 47.Rd1–+) 45.e4?? (better is 45.Rc2 Rbe3 46.Rc1 Re2 47.Kh3–+) 45...Rb2 46.Rb2 Qb2 47.Qb2 ab2 48.e5 Rg6 49.hg6 Be7 50.f5 b1Q 51.f6 Bf6! 52.ef6 Kf6 53.g7 Kg7 54.Rc4 0–1. combijack (1780) – mischo (1665), gameknot.com, 2009.

5.c4 Ne7 6.Nf3 0-0 7.Nc3 (7.d4 a5=) 7...a5 8.b5 Nd7 (8...f5 9.d4=) 9.d4 (9.Be2 e4 10.Nd4 c5 11.bc6 bc6+=) 9...f5 (9...ed4 10.Nd4 c5 11.bc6 bc6 12.Be2=) 10.Ng5 (10.Be2 e4 11.Nd2 Nf6+=) 10...ed4 11.ed4 Nf6 12.Bd3 Ne4 (12...d5!?=) 13.Nge4+/– fe4 14.Be4 Nf5 15.0-0 (15.Ne2!?+/–) 15...Nd4= 16.Na4 (16.Qd3 Bf5=) 16...Ne6 (16...Qh4 17.Bd4 Qe4 18.Bg7 Kg7 19.b6+=) 17.Bg7+= Kg7 18.Qd2 (18.Re1 Qf6 19.Ra2 Rb8+=) 18...Qg5 19.Qc3 Qf6 20.Rac1 (20.Rfe1 Re8+=) 20...Qc3 (20...Ng5 21.Bd5 Re8 22.Rfe1 Qc3 23.Nc3+/– (23.Rc3?? Re1)) 21.Rc3+= Rb8 (21...Re8 22.Re3+=) 22.Re1 (22.Re3 Nf4+=) 22...Bd7 23.Bd5 Rfe8 24.Rce3 Kf6 25.b6 c6 26.Be6 Re6 27.Nc3 Rbe8 28.Ne4+/– Kg7 29.c5 dc5 30.Nc5 Re3 31.Re3 Re3 32.fe3 Bc8 33.Ne4 Kf8 34.Nd6 Bf5 35.Nb7 Ke7 36.Na5 Kd7 37.Nb7 (37…Kc8 38.Nc5+-) 1–0. Steffens,Olaf (2320) – Frohberg,Marco, Schleswig Holstein–ch masters, 1997.

5.c4 f5 6.Ne2 (6.d4 ed4 7.Nf3 Nc6=) 6...Be6 7.Qc2 Nd7 8.d4 Ngf6 9.d5 Bf7 10.Nbc3 0-0 11.Rd1 a6 12.Nc1 Qe7 13.Be2 Bh6 (13...a5 14.b5=) 14.Nb3+= b6 15.a4 Ng4 16.Bg4 fg4 17.g3 (17.0-0 Rac8+=) 17...Qf6 18.0-0 Bg7 (18...Be8 19.Ne4 Qf5 20.Nbd2=+) 19.a5 (better is 19.Qe2=) 19...e4 (19...Rab8 20.Ne4 Qf5 21.f4 gf3 22.Nbd2 ba5 23.Rf3–/+) 20.Na4 (20.Rb1!?+/–) 20...Qf5 (20...Ne5 21.Qe4 b5 22.cb5+/–) 21.Bg7+= Kg7 22.Nd4 Qh5 (22...Qe5 23.Nc6 Qf5 24.Qc3 Qf6 25.Qf6 Kf6 26.Nc3+=) 23.Qe4 Ne5 (23...Rae8 24.Qd3+=) 24.Rc1 (24.ab6 Nc4 25.Ne6 Be6 26.Qc4 Bd7 27.Qc7 Rad8+-) 24...b5 (24...ba5 25.ba5 Rab8 26.Qc2+=) 25.cb5+/– Bd5 26.Rc7 Kh8 27.Qc2 Bf3 28.h4?? (28.Ne6 Qh3 29.Rh7 Qh7 30.Ng5–+) 28...gh3–+ 29.Nf3 Qf3 (30.Rh7 Kh7 31.Qc6 Nc6 32.bc6 Qg2#; 29...Nf3?! 30.Kh1 Nd4 31.Qd1 (31.ed4?? Qf3 32.Kh2 Qg2) 31...Qd1 32.Rd1 Nb5 33.Rc2=) 0–1. Bress – Wade, Bristol, 1968.

5.c4 Nf6 6.Nc3 +=.

5.c4 Nf6 6.Nf3=.

5.c4 Nh6 6.Be2 Nf5 7.Nc3 0-0 8.Qc2 Re8 9.g3 (9.Ne4 a5=) 9...c6+= 10.h4 d5 (10...a5 11.ba5 e4 12.h5=) 11.Nh3 (11.h5 g5=) 11...Na6 (11...Nd4!? 12.Qd1 Bf5 13.ed4 ed4–+) 12.h5= Nc7 13.g4 (13.cd5!? cd5 14.Rc1+=) 13...Nd4+= 14.Qd1? (better is 14.ed4 ed4 15.hg6 fg6 16.0-0-0–/+) 14...Ne2–+ 15.Qe2 d4 (better is 15...Qh4!? 16.hg6 fg6 17.cd5 cd5–+) 16.Ne4–/+ White prepares g5 16...a5 (16...Qh4 17.hg6 fg6 18.Qf1–/+) 17.hg6 (17.Qf3 gh5 18.gh5 f5–/+) 17...hg6 (17...fg6 18.f3–/+) 18.Qf3 (18.Nhg5!?+=) 18...f6–/+ 19.g5 (19.c5 ab4 20.Nd6 b3–/+) 19...f5 20.Nf6 Bf6 21.gf6 Qf6 22.0-0-0 ab4 (22...Qf7 23.d3 Qg7 24.ed4 ab4 25.ab4 ed4 26.Rdg1+/–) 23.ab4 Ne6 (23...Qf7 24.d3 Na6 25.Ng5=) 24.Rdg1 Kf7 (24...Ra4 25.ed4 ed4 26.Nf4+/–) 25.Qg3 (better is 25.ed4!? Nd4 26.Qe3=) 25...f4 26.ef4 (26.Ng5!? Ng5 27.Qg5 Qg5 28.Rg5 fe3 29.fe3 de3 30.Rf1 Bf5 31.de3+=) 26...ef4–/+ (26...Nf4?! 27.Nf4 ef4 28.Rh7 Kg8 29.Qh2+=) 27.Ng5 Ng5 28.Qg5 Qg5 (better is 28...Re1! 29.Re1 Qg5 30.Bd4 Be6–/+) 29.Rg5+= Rd8 (29...Bf5 30.Rgg1+=) 30.Rh4= Kf6 31.Rg1 g5 32.Rh5 (32.Rh6!? Kg7 33.Rh5=) 32...g4–/+ 33.Rgh1 Bf5 34.Rh6 Kf7 (34...Bg6 35.Rh8–/+) 35.R1h5 (35.R6h5 Bd3 36.R5h4 Be4–/+) 35...Bd3–/+ 36.Re5?? (36.Rg5 Ra4 (36...Bc4?! 37.Rg4 Rh8 38.Rf4 Ke7 39.Rh8 Rh8 40.Bd4 Rh1 41.Kc2=) 37.Rg4 Rb4 (37...Bc4 38.Rf4 Ke8 39.Bd4+-) 38.Rf4 Kg7+=) 36...g3 (better is 36...Ra4 37.Rhh5 Rb4–+) 37.fg3+= fg3 38.Rg5? (better is 38.Rh4+=) 38...Rg8–+ 39.Rg8 Rg8 (39...Kg8?! 40.Rh3 g2 41.Bd4 Ra1 42.Kb2 Rb1 43.Ka2=) 40.Bd4 (40.Rh4 g2 41.Bd4 g1Q 42.Bg1 Rg1 43.Kb2 Rg3–+) 40...Rg4 41.Rd6 (41.Be3–+) 41...Ke7 42.Bc5 Rc4 43.Kb2 g2 (better is 43...Rc5 44.Rd3 Rg5 45.Re3 Kf6–+) 44.Rd3= Rc5 45.Rg3 Rc4 46.Kb3 Rd4 47.Rg2 Kd6 48.Kc3 Rd5 49.Rg7 b5 50.Rg6 Kc7 ½–½. Ackaert,Thierry (2075) – Sadkowski,Daniel (2260), 39th Eastman Open, 2016.

5.d4 Nd7 6.c4 Ngf6 7.de5 Ne5 8.Nd2 (8.Be5 de5 9.Qd8 Kd8=) 8...0-0 9.h3 (9.Ngf3 Nfd7 10.Nd4 Nb6=) 9...b6 (9...Re8 10.Ngf3=+) 10.Ngf3= Nc6 (10...Qe7 11.Be2=) 11.Be2 (11.b5 Ne7+=) 11...Bb7 (11...a6 12.b5 Na5 13.0-0+=) 12.0-0+= Qe7 13.Qc2 (13.Nd4 Ne5=) 13...Nd8 (13...Rfe8 14.Rfd1=) 14.Nd4 (14.Qd3 Ne6+=) 14...c5 (14...Re8 15.Bf3+=) 15.N4b3 Nc6 (15...Re8 16.Rfd1=) 16.b5 (16.Bc3 a5=) 16...Ne5= 17.a4 d5 18.Nf3 (18.a5!?=) 18...Nc4=+ 19.Bc4 dc4 20.Nbd2 Ne4 (20...Rfd8!?=+) 21.Bg7= Kg7 (21...Nd2 A) < 22.Bf8 Nf3 23.gf3 Qg5 (23...Rf8?! 24.Qc4 Qf6 25.Qf4 Qf4 26.ef4=) 24.Kh2 Bf3–/+ (< 24...Rf8 25.Rg1 Qh5 26.f4+=); B) 22.Nd2 Kg7 23.Nc4=) 22.Qc4 Rad8 23.Rad1 Nd2 24.Nd2 Bd5 25.Qc2 Rd7 26.Nb1 Qg5 27.e4+= Be6 28.Qc3 Qf6 29.Qf6 Kf6= 30.Rd7 Bd7 31.Rd1 Be6 32.Nc3 Ke5 33.f3 f5 34.ef5 Rf5 35.Kf2 Bb3 36.Rd7 Rf7 37.Rf7 Bf7 38.Ke3 h5 39.h4 Kf5 40.g3 Bb3 41.Kd3 Ke5 42.Ke3 Be6 43.Kd3 Bh3 44.Ke3 Bf5 45.Nd1 Kd5 46.Nb2 c4 47.Kd2 Kd4=+ 48.Nd1 Bh3 49.Nc3 Bg2 50.Ne2 Kc5 51.Nf4 Bf3–/+ 52.Ng6 Kb4–+ 53.Ne5 c3 54.Kc1 Be2 55.Nc6 Ka4–+ 56.Kc2 Bb5 57.Ne5? Kb4 58.g4 hg4 59.Ng4 Be8 60.Nf6 Bg6 61.Kc1 Kb3 62.h5 Bf5 63.h6 a5 64.h7 Bh7! 65.Nh7 a4 66.Ng5 a3 67.Nf3 a2 68.Nd4 Kc4 69.Nc2 b5 70.Na1 Kd3 71.Kd1 b4 72.Nb3 c2 73.Kc1 Kc3 74.Na1 b3 75.Nc2 b2 (76.Kd1 b1Q 77.Ke2 Qc2 78.Kf3 Qf5 79.Kg2 Qf4 80.Kh3 a1Q 81.Kg2 Qaf1#; 75...bc2?!=) 0–1. Fialka,Miloslav – Hladik,Josef, Velke Mezi, 1979.

5.Nf3 Nf6=.

5.f4 Nf6 6.fe5 Ng4 7.Nf3 Nc6 (7...Ne5 8.Ne5 de5 9.Be2=) 8.Be2 (8.Bb5 Bd7+= (< 8...de5 9.h3+/–)) 8...Nce5 9.Ne5 Ne5 (9...Be5 10.Be5 (10.Bg4 Bg4 11.Qg4 Bb2 12.Qe4 Be5+/–) 10...Ne5 11.0-0+=) 10.0-0+= Nf3 11.Bf3 Bb2 12.Ra2 Bg7 13.c4 0-0 (13...Qe7 14.Qb3+=) 14.Nc3 Rb8 (14...Be6 15.Bb7 Bc4 16.Ba8 Qa8 17.Rc2+=) 15.d4 Be6 16.Bd5 Bd5 17.Nd5 c6 18.Nf4 (18.Nc3 f5+=) 18...Qe7 19.Qd3 (19.Rf3 f5=) 19...Rfe8 (19...Rbe8 20.Rf3+=) 20.Rf3 (20.Re2 f5=) 20...Qe4= 21.Qf1 Re7 22.Raf2 Rbe8 23.Rh3 a6 24.a4 f5 25.c5 d5 26.Qd1 Rf7 27.Rhf3 Qe7 28.b5 ab5 29.ab5 Ra8 30.Qb3 Qe8 31.Qc3 Re7 32.Rh3 Ra4 33.Rf1 Qa8 34.Rb1 Ra3 35.Qd2 Qe8 36.bc6 bc6 37.Re1 Re4 38.Kf2 Qb8 39.Rf3 Rb3 40.Qc1 g5 41.Ne2 f4 42.h3? Rbe3–/+ 43.Re3 Re3 44.Qd2 Re4 45.Kf1 Qb3 46.Kf2 Qe3 47.Qe3 fe3 48.Kf3 Bd4 49.Nd4 Rd4 50.Re3 Kf7 51.Ra3 Rc4 52.Ra7 Kg6 53.Rd7 Rc5–+ 54.g4 Rc3 55.Kf2 Kf6 56.Rh7 d4 57.h4 gh4 58.Rh4 Kg5 59.Rh8 Kg4 60.Ke2 c5 61.Kd2 Kf4 62.Re8 Kf5 63.Re7 Ra3 64.Rc7 Ra5 65.Kd3 Ke5 66.Kc4 Kd6 67.Rc8 Ra4 68.Kb3 Rb4 69.Kc2 Kd5 70.Rg8 Kc4 71.Rg4 Rb3 72.Rh4 Re3 (73.Kd2 Kd5–+) 0–1. Luzuriaga,Norberto Horacio – Lebel,Patrick, Orang–Utan Invitational, 2001.

4.b5 Nd4 5.c3 Ne6 6.d4 Nf6 7.de5 Ne4=.

4.Bb5 a5 5.ba5 Bd7 6.d3 Ra5 7.Nc3 Nf6=.

4.Bb5 a5 5.c3=.

4.Bb5 a6 5.Bc6 bc6 6.Nf3 Bb7 7.d3 Nf6 8.Bg5 h6 9.Bf6 Qf6= 10.0-0 c5 11.bc5 dc5 12.Nc3 Bd6 13.Re1 a5 14.h3 g5 15.Nh2 Bc6 16.Ng4+/– Qe6 17.Qf3 Be7 18.Nd5 Bd5 19.ed5+- Qd6 20.Ne5 f6?? 21.Ng6 Rh7 22.Re2 Kd7 23.Qf5 Kd8 24.Ne7 Re7 25.Re7 Qe7 26.c4 1–0. iboyd (1950) – sbderkach (1680), net–chess.com, 2006.

4.Bb5 Qd7 5.d3 a6 6.Bc4 Nf6 7.Nf3 b5=.

4.Bb5 Bd7 5.Nf3 Nf6 6.d3 a5 7.ba5 Ra5=.

4.Bb5 Nge7 5.Nf3 a6 6.Ba4 Bg4 7.h3 Bh5=.

4.Bb5 Nf6 5.Nc3 Qd7 6.Nf3 a5 7.ba5 Ra5=.

4.Bb5 Nf6 5.d3 Be7 6.Nf3 0-0 7.Bc6 bc6=.

4.Bb5 Qg5 5.Qf3 Nf6 6.Ne2 Qg6 7.Bc6 bc6=.

4.Bb5 Qg5 5.Qf3 Nf6 6.Ne2 Qg6 7.Ng3 a5=.

4.Nc3 a5 5.b5 Nd4 6.Nf3 Nf6 7.Nd4 ed4=.

4.Nc3 Nd4 5.Nf3 Nf6 6.Be2 a5 7.b5 Be7=.

4.Nc3 Nd4 5.Nf3 Nf6 6.Be2 Be7 7.0-0 0-0=.

4.Nc3 Be7 5.Nf3 Nf6 6.Bb5 Bg4 7.Bc6 bc6=.

4.Nc3 Nf6 5.Bb5 Qd7 6.d3 a6 7.Bc4 b5=.

4.Bc4 Nf6 5.Nc3 Be7 6.Nge2 Ne4 7.Ne4 d5=.

4.Bc4 Qg5 5.Nf3 Qg6 6.d3 Nh6 7.Bh6 Qh6=.

4.Nf3 Nf6 5.Nc3 Nd4 6.Nd4 ed4 7.Nd5 c6=.

4.Nf3 Nf6 5.Nc3 Nd4 6.Nd4 ed4 7.Nd5 Nd5=.

4.Nc3 Nc6 (4...Nf6 5.Nf3 0-0 6.Be2 a5 7.b5 d5=; 4...a5 5.b5 Nf6 6.Nf3 Bg4 7.Be2 Nbd7=; 4...Be6 5.Nf3 Nc6 6.Bb5 a5 7.ba5 Bd7=; 4...Nd7 5.Nf3 Ngf6 6.Be2 0-0 7.0-0 c6=) 5.Nf3 Nf6 6.Bb5 Bg4 7.Bc6 bc6=.

4.Bc4 a5 (4...Nf6 5.Nc3 Ne4 6.Ne4 d5 7.Qh5 0-0=; 4...c6 5.Nf3 b5 6.Ba2 Nf6 7.Nc3 a5=; 4...Nc6 5.Nf3 Nf6 6.d3 Bg4 7.c3 0-0=) 5.b5 Nf6 6.Nc3 Ne4 7.Ne4 d5=+.

4.Be2 Nf6 (4...a5 5.b5 Nf6 6.d3 Qd7 7.Nc3 0-0=) 5.Nc3 d5 6.ed5 Nd5 7.Bb2 Nc3=.

4.Nf3 a5 5.b5 Nf6 6.Nc3 Bg4 7.Be2 Nbd7=.

4.Nf3 Nd7 5.Nc3 Ngf6 6.Be2 0-0 7.0-0 Re8=.

4.Nf3 f5 5.ef5 Bf5 6.Bc4 Bf6 7.Bb2 Nc6=.

4.Nf3 Nf6 5.Nc3 0-0 6.Be2 c5 7.0-0 Nc6=.

4.Nf3 Nf6 5.Nc3 Nc6=.

4.Nf3 Nf6 5.d3 0-0 6.Nc3 Bg4 (6...a5 7.b5=+) 7.Be2= Nc6 8.0-0 Bf3 9.Bf3 Nd4 10.a4 (10.Be3 c6=) 10...Nf3 (10...c6 11.g3=+) 11.Qf3 c6 12.Rd1 (12.Qg3 Nh5 13.Qe3 Qd7=) 12...Rc8 (12...d5 13.Rb1=) 13.a5 (13.d4 Qc7=) 13...d5 14.Bg5 (14.Rb1=) 14...h6 (better 14...Bb4!? 15.Ne2 Be7–/+ (worse 15...Ba5 16.Bf6 gf6 17.Ng3+=)) 15.Bf6+= Bf6 16.ed5 cd5 (16...Qd7 17.Rd2+=) 17.Nd5 Qd6 (17...Rc2!? 18.a6 ba6 19.Ra6 Bg5 20.Ra7 Qd6+-) 18.c4 (18.Nf6 Qf6 19.Qb7 a6+-) 18...Be7 (better 18...Bg5!?+-) 19.c5+- f6?? (19...Qd7 20.d4 e4 21.Qe4+-) 20.Ne7 (better 20.cd6 Bd6 21.Rac1+-) 20...Qe7 21.a6 (21.Qe4 Rc7+-) 21...ba6 22.Qd5 (22.Ra6 Rfd8+-) 22...Kh8 (22...Qf7 23.Qf7 Rf7 24.Ra6+-) 23.Ra6 (23.Qc4 Rfd8+-) 23...Rfd8+- 24.Qa2 (24.Rd6+-) 24...Rd4 (better 24...Qb7!? 25.Qa3 Rd4+-) 25.Ra7+- Qe8 26.Qb2 (26.Qb3 Rb8 27.Rb1 e4 28.de4 Re4+-) 26...Rcd8? (26...Qb5 27.Rb1+-) 27.Qc3 (better 27.b5!? e4 28.c6 Rd3 29.Re1+-) 27...Qb5+- 28.Rda1 (28.Qe1!?+-) 28...Rd3 (28...Rb4!? 29.Rc1 Rd3=+) 29.Qe1+- Qb4?? (better 29...R3d4+-) 30.c6 (better 30.Qb4 Rd1 31.Qe1 Re1 32.Re1+-) 30...Qb6 (30...Qc5 31.c7 Rc8 32.g3=+) 31.g3?? (better 31.c7 Rc8 32.Qc1+=) 31...Qc6–/+ 32.h3 (32.Qe2 R3d4–/+) 32...Qb6 (better 32...Qf3 33.Kh2 Kh7–/+) 33.Qe4?? (33.Kh2 e4!–/+) 33...Rd1 (better 33...Rg3! 34.Kf1 Qb5 (34...Rh3? 35.Qg2 Rd7 36.Ra8 Kh7 37.Qh3 Qb5 38.Kg2 Qd5 39.Kh2+-) 35.Qe2 Rg1 36.Kg1 Qe2–+) 34.Kg2–/+ Ra1 (34...R1d2!? 35.Qe1 Qc6 36.Kg1 R8d3–/+) 35.Ra1=+ Qd4 (35...Kg8 36.Qc4 Kf8 37.Ra6 Qb7 38.Qc6=+) 36.Qb1 (36.Qd4!? Rd4 37.h4=+) 36...Qd5–/+ 37.f3? (better 37.Kh2!?–/+) 37...Qd2–+ 38.Kh1 Qf2 39.Qb7? (39.Qf5–+) 39…Rd2 (39...Rd2 40.Ra8 Rd8 41.Rd8 Kh7 42.Qe4 f5 43.Qf5 g6 44.Qf7) 0–1. Benreguia,Frederic – Estieu,Frederick, FICGS, 2009.

4.Nf3 Bg4 5.Nc3 Nf6 6.Be2 Nc6 7.0-0 0-0=.

4.Bb2 Nf6 5.g3 Be7 6.Bg2 0-0 7.d3 Nbd7 8.Nd2 Rb8 9.Ngf3 Qe8 10.0-0 Qh5 11.Qc2 Ng4 12.Rae1 Bg5 13.h3 Nh6 14.Ng5 Qg5 15.Nf3 Qe7 16.e3 Nf6 17.Re2 Be6 18.Rfe1 Rbe8 19.Ng5 Bc8 20.Qa4 a6 21.Qb3 Nf7 22.c5 Kh8 23.cd6 cd6 24.Nf3 Be6 25.Qc3 Nd5 26.Qd2 Qd7 27.e4 fe4 28.Re4 (better 28.de4!? Nb6 29.Kh2=+) 28...Bh3-/+ 29.Bh3 Qh3 30.d4 Nf4 (30...Qf5!? 31.Nh4 Qg5 32.Qg5 Ng5=+) 31.gf4=+ Qf3 32.fe5 de5 33.de5 Re6 34.R1e3? (better 34.Rf4 Qh3 35.Re3 Rg6 36.Rg3 Rg3 37.fg3 Qg3 38.Kf1-/+) 34...Rg6-+ 35.Kf1 Qg2 36.Ke2 (36.Ke1 Nd6!! 37.ed6 Qh1 38.Ke2 Rf2 39.Kd3 Rd2 40.Kd2 Rd6 41.Rd4-+) 36...Ng5 (better 36...Nd6 37.Qd6 Rd6 38.ed6 Qf2 39.Kd3 Qb2-+) 37.Kd1?? (better 37.Rf4! Rg8 38.Qd3=) 37...Ne4-+ 38.Qe1 (38.Qd4 Qh1 39.Re1 Rg1 40.Rg1 Qg1 41.Kc2 Rf2 42.Kb3 Nd2 43.Kc3 Qg3 44.Kc2 Qg6 45.Kd1 Qb1 46.Bc1 Qb3 47.Ke1 Rf1 48.Kd2 Rd1 49.Ke2 Rd4 50.Kf2 Qc2 51.Kf3 Qc1 52.Kf2 Qc2 53.Kg3 Qc3 54.Kf2 Rd2 55.Kg1 Qc1) 38...Nf2 39.Kc1 Rh6 40.Qe2 (40.Qd2 Qg6 41.Qe1 Rc8 42.Rc3 Nd3 43.Kd2 Rd8 44.Kc2 Ne1 45.Kb3 Qe6 46.Rc4 b5 47.Ka2 Qc4 48.Ka1 Rd1 49.Bc1 Rc1 50.Kb2 Nd3) 40...Qc6 41.Kd2 Rd8 42.Ke1 (42.Qd3 Nd3 43.Rg3 Rh2 44.Ke3 Qh6 45.Rg5 Qg5 46.Ke4 Qf4) 42...Qh1 43.Qf1 (43.Kf2 Rh2 44.Kg3 Qg1 45.Kf3 Rh3 46.Ke4 Qg6 47.Kf4 Rf8) 43…Rd1 (43...Rd1 44.Kf2 Qf1 45.Kg3 Rg6 46.Kh4 Qf4 47.Kh5 Rg5) 0-1. Mighty Rubble (2015) - bobby fissure (2225), ChessWorld.net, 2011. (=1.c4 e5 2.a3 d6 3.b4 f5)

4.Nc3 Be7 5.ef5 Bf5 6.Qf3 Bc8 7.Qg3 Bf6=.

4.Nc3 Nf6 5.ef5 Bf5 6.Qf3 Qc8 7.Bd3 Be6=.

4.d3 Nf6=+ 5.Nd2 Be7 6.Bb2 0-0 7.Be2 Be6 8.Ngf3 Nbd7 (8...a5!?=+) 9.Ng5+= White launches an attack 9...Bf7 10.Nf7 Rf7 11.ef5 Nd5 12.g3 (12.0-0+=) 12...Rf5 (better 12...N5b6!?=) 13.Bg4+/- Rf6 14.Ne4 Rg6 15.Bf5 Rh6 (15...Qe8 16.Qh5+-) 16.Bc1 Rf6 17.Nf6 N7f6 (17...N5f6 18.f4+-) 18.c4 Nb6 19.0-0 c6 20.Bb2 Qc7 21.f4 ef4 22.Rf4 Rf8 23.Qe2 Kh8 24.Rh4 Threatening mate... how? 24...h6 25.Rh6! gh6 A pinning theme 26.Qh5 Rf7 (26...Bd8 27.Qh6 Kg8 28.Be6 Qf7 29.Qg6 Kh8 30.Bf7 Rf7 31.Re1 Nbd7 32.Re8 Rf8 33.Re4 Bb6 34.Kg2 Ne5 35.Rh4 Nh7 36.Rh7) 27.Qf7 Bd8 (27...Qd8 28.Qh7) 28.Qf8 1-0. Maestro – Nibbi, internet, 2020.

4.d4 ed4 5.ef5 c5 6.Qh5+= Kd7 7.Bg5 Be7 8.Bb5 Nc6 9.Qf7 Qe8? 10.Bc6 Kc6?? 11.Qe8+- (11...Bd7 12.Qa8 (12.Be7 Re8 13.Kd2 Re7–/+) 12...Bg5 13.bc5 dc5 14.Nd2+-) 1–0. kode (2345) – alwayslosing (1945), net–chess.com, 2008.

4.d4 Qe7 5.Nc3 Nf6 6.Bg5 ed4 7.Bf6 gf6 8.Qd4 Nc6=.

4.ef5 Bf5 5.d3 Nf6 6.Bg5 Nbd7 (6...Be7 7.Nf3+=) 7.Nc3 (7.Qf3 Be6 8.Qb7 Be7+=) 7...Be7 (7...Be6 8.Be2+=) 8.Nf3 (better is 8.Qf3!? Be6 9.Qb7=) 8...0-0+= 9.h3 h6 10.Bf6 Bf6 (worse is 10...gf6 11.Nh4 Bh7 12.Qg4 Kf7 13.Nf5 Bf5 14.Qf5+/–; 10...Rf6?! 11.d4+=) 11.Ne4 Be7 (11...d5 12.Ng3 e4 13.de4 Bc3 14.Nd2 Be4 15.Rb1–+) 12.Ng3 Bh7 13.Be2 Nf6 14.0-0 c6 15.c4 Qc7 16.Re1 Rae8 17.Rc1 White plans c5 17...Bd8 18.Bf1 Qb8 19.a4 d5 Black prepares e4 20.Qb3 Kh8 21.c5 Bc7 22.Nd2 a6 23.Nf3 (better is 23.b5!?+=) 23...e4–/+ 24.de4 Bg3 25.fg3 Qg3 26.ed5 Nd5 27.Re8 Re8 28.b5 ab5 29.ab5 Nf4 30.Qb2 (30.Kh1!? Bg8 31.Qc3–/+) 30...Nh3 31.Kh1 Nf2 (31...Be4 32.Qc3–+) 32.Kg1 Nh3 (better is 32...Nd3 33.Bd3 Bd3–+) 33.Kh1+= Nf4 34.bc6 bc6 35.Qd2 (35.Rd1 Qg4–+) 35...Rf8 (better is 35...Re2! 36.Qd8 Bg8 37.Qh4 Rg2 38.Qg3 Rg3 39.Ne5–+) 36.Rc3 Nd5 37.Rb3 Be4 38.Qe2 Bf3 39.Rf3 Rf3 40.Qf3 Qf3 41.gf3 g5 42.Kg2?? (better is 42.Bc4 Nf4 43.Bf7–+) 42...Kg7 (better is 42...Ne3 43.Kf2 Nf1 44.Kf1 Kg7–+) 43.Bc4?? (43.Kg3 Kf6 44.Bh3–+) 43...Ne3 44.Kf2 Nc4 (44...Nc4 45.Kg3 h5–+) 0–1. pillsbury (2080) – cristero (2425), net–chess.com, 2013.

4.ef5 Bf5 5.Qf3 Qc8 6.Bc4 Nf6 7.d3 d5=.

4.Bb5 c6 5.Bd3 =+.

4.Bb5 Bd7 5.Nc3 (5.Bd7!? Qd7 6.d3=) 5...Bb5=+ 6.Nb5 Ne4 (6...a5 7.ba5 Ne4 8.d3–/+) 7.Qe2 (7.d3 Nf6=+) 7...Nf6 8.Qe3 (8.d4 Nbd7=+) 8...Qd7 (better is 8...a6 9.Nc3 Nc6–/+) 9.Na7?? (better is 9.Nc3–/+) 9...Ng4–+ 10.Qg5 Ra7 11.Nf3 Qe6 12.0-0 Nf6 13.Nh4 Qg4 14.Qg4 Ng4 15.f3 Nf6 16.Re1 Be7 17.Nf5 Bf8 18.d3?? Nc6 19.Be3 Ra8 20.c4 g6 21.Nh6 Bg7 22.b5 Ne7 23.Rab1 b6 24.Bc1 Nd7 25.Re4 Nc5 ½–½. Graefe,Hartmut – Tzannetakis,Stefanos, CiF, 1993.

4.Nc3 a5 5.b5 Be7 6.Nf3 Bg4 7.Be2 0-0=.

4.Nc3 c5 5.Nf3 Bg4 (5...Nc6 6.Bb5=) 6.Bc4 (6.h3 cb4 7.ab4 Bh5+=) 6...a6 (6...cb4 7.ab4 Nc6 8.Ba3=) 7.0-0 (7.bc5 Qc7+=) 7...Nc6 (better is 7...cb4 8.ab4 Nc6+=) 8.Qe1 (8.bc5 dc5 9.a4 Be7=) 8...Qe7 (better is 8...Bf3!? 9.gf3 cb4 10.ab4 Nb4–/+) 9.Ng5= Nd8 (9...Bh5 10.bc5 dc5 11.d3=) 10.f3+= Bh5 (10...Bc8 11.Qh4+=) 11.d3 h6 12.Nd5?? (better is 12.Nh3+=) 12...Nd5–+ 13.Bd5 hg5 14.Qg3 Qd7 15.bc5 Rc8 16.cd6 Bd6 17.Qg5 g6 18.g4 Rc2 19.Be3 Bg4 20.fg4 Rhh2 21.Bf2? Rh7 22.Rac1? Qc7 23.Rc2–/+ Qc2 24.Bh4 Be7?? 25.Qe7 1–0. cloc – esanelle, net–chess.com, 2005.

4.Nc3 Nbd7 5.Nf3 a5 6.b5 Be7 7.d4 ed4=.

4.Nc3 Be6 5.Nf3 Be7 6.d4 Nbd7 7.d5 Bg4=.

4.Nc3 Be7 5.Nf3 0-0 6.Bb2 Bg4 7.h3 Bh5 8.Bc4 d5 (better is 8...a5!?=) 9.Nd5+/– Nd5 10.Bd5 (10.ed5?! e4 11.g4 Bf6=) 10...c6 11.Ba2 Kh8 (11...Nd7!?+/–) 12.Be5+- Bf6 13.d4 Be5 14.de5 Qd1 (14...Nd7 15.g4 Bg6 16.Qd4+-) 15.Rd1 Bf3 (15...a5 16.Bb3+-) 16.gf3 b6? (16...h6+-) 17.Bf7 Na6 (17...a6 18.f4+-) 18.e6 g6 (18...Nc7 19.Rg1+-) 19.e7 (19...Rfc8 20.Rd7+-) 1–0. fightinbluehen (2405) – bobbybellona (1910), net–chess.com, 2003.

4.Nc3 Be7 5.Nf3 0-0 6.h3 Be6 (6...Nc6 7.b5 Nd4 8.Bc4=+) 7.Be2 (7.d4 a5 8.b5 ed4 9.Nd4 d5=) 7...Nc6 (7...a5 8.b5=) 8.0-0 (8.d4 ed4 9.Nd4 Nd4 10.Qd4 a5=+) 8...h6 (8...Nd4 9.Bb2=+) 9.d4= ed4 10.Nd4 Nd4 11.Qd3?? (better is 11.Qd4 c5 12.Qe3=) 11...Ne2–+ 12.Ne2 a6 13.c4 Nh7 14.Ng3 Bf6 15.Rb1 Rb8 16.Bb2 Bb2 17.Rb2 b6 18.Rd1 Qf6 19.Rbd2 Rbd8 20.Qc2 Rfe8 21.c5 dc5 22.bc5 Rd2 23.Rd2 Qa1 24.Kh2 Qa3 25.cb6 cb6 26.Rd3 Qa2 27.Qc6 Rb8 28.Qc7 Rc8 29.Qb6 Qc4 30.Rd2 Nf6 31.f3 Rc6 32.Qa5 Qc3 33.Qd8 Kh7 34.Rd3 Qe5 35.Qa8 Rc8 36.Qa6 Nh5 (37.Qd6 Qf4–+) 0–1. losertoo (1860) – tomy (2260), net–chess.com, 2006.

4.Nc3 Be7 5.Nf3 Nbd7 6.Be2 a5 7.b5 Nc5=.

4.d3 Nc6 5.Bb2 Be7 6.Nf3 a6 7.Be2 (7.d4 Ne4 8.de5 de5 9.Qd8 Bd8 10.Bd3 f5 11.Ne5 Bf6=) 7...b5 (7...0-0 8.0-0= (8.Nbd2 Bg4 9.h3 Bf3 10.Nf3 Re8 11.0-0 d5=) 8...Bg4 9.h3 Bf3 10.Bf3 Qd7 11.Nd2 b5=; 7...Bd7 8.Nbd2 (8.0-0 0-0 9.Nbd2 Re8 10.d4 ed4 11.Nd4 Qc8=) 8...0-0 9.0-0 Re8 10.Re1 Ng4 11.h3 Nh6=) 8.0-0 (8.Nbd2 0-0 9.0-0 Be6 10.c4 bc4 11.dc4 Qb8=) 8...0-0 9.c3 (9.c4 Be6 10.Nbd2 bc4 11.dc4 Qd7=) 9...Bb7 10.Re1 (10.a4 d5 11.Nbd2 Re8=) 10...h6 (10...Re8 11.a4 d5=) 11.Bf1 (11.Nbd2 d5+=) 11...Re8 (11...Qd7=) 12.Nbd2 Nd7 (12...Ng4 13.d4=) 13.Nb3 (13.d4 ed4 14.cd4 d5+=) 13...Bf6 14.d4 a5? (better is 14...Nb6+=) 15.d5+- (< 15.Bb5 ed4 16.cd4 ab4 17.Bc6 Bc6+/–) 15...Ne7 16.Na5 Ba6 17.Nd2 Nf8 18.c4 bc4 19.Bc4 Bc4 20.Ndc4 Rb8 21.Nc6 Nc6 22.Rf1?? Ne7–/+ (23.Bc1 Nfg6–/+) 0–1. macedon (2065) – bar (1905), net–chess.com, 2008.

4.d3 Nc6 5.c3 Ng4 (5...d5 6.b5 Na5 7.Nf3 de4 8.Ne5=+) 6.Qf3 (6.Be2 Nf6=) 6...Be7 7.Be2 (7.b5 Na5 8.Nd2 Be6=) 7...Be6 (7...Bg5 8.Bg5 Qg5 9.Nd2=) 8.h3 (8.Nd2 a6=) 8...Nf6 (8...Bg5 9.b5 Bc1 10.bc6–/+) 9.Bb2 (9.Qg3 a6=) 9...Qd7=+ 10.Nd2 0-0-0 (10...d5 11.b5 Nb8 12.c4=+) 11.a4 (11.b5 Nb8 12.c4 Rhe8=) 11...Qe8 (11...d5 12.b5 Nb8 13.Rd1=+) 12.d4 (better is 12.b5!? Nb8 13.Qe3=) 12...ed4–/+ 13.cd4 Nb4 14.Rc1 Qa4 15.Bd1 (15.d5!? Bd7 16.Qc3=+) 15...Qa2 (15...Qb5 16.Be2 Qb6 17.Nc4 Bc4 18.Bc4–+) 16.Qc3 Nc6?? (16...Nd3 17.Qd3 Qb2 18.Rb1–/+) 17.d5?? (17.Ra1!? Ne4 18.Ne4+=) 17...Bd5 18.ed5= Qd5 19.Bf3 Qe5–/+ 20.Ne2 Qc3 21.Bc3 h5 22.Bc6= bc6 23.Rb1 Kd7 24.Rb7 Ra8–/+ 25.0-0 g5 26.Ne4?? Ne4–+ 27.Bh8 Bf6?? 28.Bf6+= Nf6 29.f3 Nd5 30.Nd4 c5 31.Nf5 Re8. rodnel – sburritt, net–chess.com, 2006.

4.d3 Nc6 5.Nf3 Be6=.

4.d3 Bd7 5.Bg5 (5.Nc3 Be7=) 5...c5 (5...h6 6.Bf6 Qf6 7.Nc3=+) 6.c3 (6.Nc3 Be7=) 6...cb4 (6...h6 7.Bh4=) 7.cb4 (7.ab4 Be7=) 7...Be7 8.Bf6 (8.Nc3 Nc6=) 8...gf6 (8...Bf6!? 9.Nf3 a5=+) 9.Nf3 a5 (9...f5 10.Nc3=) 10.ba5 (10.Nc3 ab4 11.ab4 Ra1 12.Qa1 f5=) 10...Ra5 (10...Qa5 11.Nbd2=+) 11.Nh4 (11.Nc3 f5=) 11...f5 (11...d5!?=+) 12.Nf5= Bf5 13.ef5 0-0 (13...Nc6 14.Be2=) 14.Qg4 (14.Ra2 Nc6+=) 14...Kh8= 15.Be2 (15.Nd2 d5=) 15...Nc6 16.0-0 Nd4 17.Bd1 (17.Ra2 d5=) 17...Rg8 (17...Qb6 18.Nd2 d5 19.Rb1=) 18.Qe4=+ Qc7 19.f4 Bf6 20.fe5 (20.Nd2 d5 21.Qe1 ef4–/+) 20...Be5–/+ (20...de5?! 21.Nd2=) 21.Ra2 f6 (better is 21...d5!? 22.Qe3 Bh2 23.Kh1 Be5–/+) 22.Kh1 d5 23.Qh4 Rg5 24.g4 (24.Raf2 Rc5=) 24...Rc5 (24...Qb6 25.Nd2=) 25.Nd2 Rc3 26.Qh3 Qc6 27.Nf3 (27.Re1 Qa6 28.Qg2 Rd3 (< 28...Ra3 29.Ra3 Qa3 30.Qd5+=) 29.Qd5 Nf5=+) 27...Rd3 28.Ne5 Rh3 29.Nc6 Nc6 30.Rf3 Rh6 31.Rb3+/– Rg7 32.Rd2 d4 33.Bf3 Rh3? 34.Kg2+- Rf3 35.Kf3 Rd7 36.Ke4 +-. Grzywna – NN, ZDK–Sarzyna, 1986.

4.d3 Be7 5.Bb2 0-0 6.Nf3 Bg4 (6...a5 7.b5=) 7.Be2= Nbd7 8.Nbd2 Re8 (8...Nb6 9.c4=) 9.h3 Bh5 (9...Bf3 10.Nf3 d5 A) worse 11.Be5 de4 12.de4 Ne5 13.Ne5 Ne4 14.Qd8 Rad8-/+ (14...Red8?! 15.0-0=); B) 11.0-0=) 10.c3 (10.g4 Bg6+=) 10...Nf8 (10...d5 11.c4 a5 12.c5=) 11.Nf1 (11.g4 Bg6+=) 11...Ne6 12.g3 (12.Ng3 Bf3 13.Bf3 c6=) 12...c6 (12...a5 13.Ne3=+) 13.N1h2 (13.g4 Bg6=+) 13...Nd7 14.Ng4 Bg6 15.Bc1 f6 (15...a5 16.Bd2=+) 16.Nh4= Bf7 17.Nf5 Bf8 18.Be3 d5 19.ed5 (19.0-0 Ng5=) 19...cd5=+ 20.0-0 a6 (20...a5 21.Bf3 ab4 22.cb4-/+) 21.Bf3= Nc7 Black intends e4 22.Rc1? (22.Bg2 Rc8=) 22...Rc8 (better 22...Be6!? 23.Nh4 f5-/+) 23.c4=+ e4 (better 23...Be6!? 24.Nh4 d4=+) 24.de4+= de4 25.Be2 (25.Bg2 h5 26.Nh2 a5+=) 25...Ne5 (25...h5 26.Nh2=) 26.Bb6 (26.Qb3 Ng4 27.Bg4 Ne6+=) 26...Qd1 (26...Ng4 27.Bg4 g6 28.Qd8 Red8= (28...Rcd8? 29.Bc7 Rc8 30.Nd6 Rc7 31.Ne8 Be8 32.Be6 Bf7 33.Bf7 Kf7 34.c5+-)) 27.Rcd1 (better 27.Rfd1 Na8 28.Be3+=) 27...Ne6?? (better 27...Nc4 28.Nfh6 gh6 29.Nf6 Kg7-/+) 28.Ne5+/- fe5 29.c5 g6 (29...Rc6 30.Rfe1+/-) 30.Nd6+- Bd6 31.Rd6 (31.cd6 Rc6 32.d7 Rb6 33.de8R Be8+-) 31...Nd4+/- 32.Bg4 Be6 33.Be6 Re6 34.Rd7 (34.Re6 Ne6 35.Re1 Kf7+/-) 34...Nc2 (34...Rf6!?+=) 35.Rb7+- Na3 (35...Rf6 36.Rd1 e3 37.fe3 Ne3 38.Re1+/-) 36.Ra1 Nc2 37.Rb1 (better 37.Ra6!? Nb4 38.Raa7+-) 37...e3+/- 38.fe3 Ne3 39.Ra7 (39.Ra1 Rf6+/-) 39...Nc4 40.Ra6 Nb6 41.cb6 Rb8 42.b5 Reb6 43.Rb6 Rb6 44.Kf2 Kf7 45.Ke3 ½-½. Felfelton (2180) - paoloone (2170), ChessWorld.net, 2021.

4.d3 Be7 5.Bb2 Nc6 6.Nf3 Bg4 7.Be2 0-0 8.Ng1 Be6 9.h3 d5 10.ed5 Nd5 11.b5 Nd4 12.Bd4 ed4 13.Nf3 Nc3 14.Nc3 dc3 15.0-0 a6 16.ba6 Ra6 17.d4 Ra3 18.Ra3 Ba3 19.Re1 Bd5 20.Ne5 c6 21.Qa1 Bb2 22.Qa7 Qa8 23.Qb6 Re8 24.Qc7 Qc8 25.Qb6 f6 26.Nd3 Re7 27.Nb2 Qe8 28.Nd3 Re2 29.Re2 Qe2 30.Qd8 Kf7 31.Qd7 Qe7 32.Qg4 b5 33.Qh5 Kg8 34.Qg4 h6 35.Kf1 Bc4 36.Qc8 Kf7 37.Qc6 Bd3 38.cd3 b4 39.Qc4 Ke8 40.d5 Kd7 41.Qb5 Kc8 ½–½. pillsbury (2180) – cristero (2450), net–chess.com, 2014.

4.d3 Be7 5.Nf3=.

4.d3 Bg4 5.Be2 Be6 (5...Bd7 6.Nc3 Nc6 7.Nf3 a5 8.ba5 Ra5 9.0-0 Be7=) 6.Bg5 (6.Nf3 Be7 7.0-0 0-0 8.Ng5 Bd7 9.Nc3 c5=) 6...Be7 7.Nc3 (7.Nf3 h6 8.Be3 Nbd7 9.0-0 d5=) 7...a6 (7...Nc6 8.Nf3 0-0 9.0-0 Nd4=) 8.Nf3 (8.Bf6 Bf6 9.Bg4 Nc6=) 8...0-0 (better is 8...Nc6= 9.0-0 0-0=) 9.Nd5 (better is 9.d4!?= Ng4=) 9...Bd5 (9...Nd5 10.ed5 Bd5 11.Be3–/+) 10.ed5=+ Nbd7 (10...Nd5 11.Bd2=+) 11.c4 (11.Bf6 Bf6 12.Rb1=) 11...h6 (better is 11...Nd5 12.Bd2 N5b6=+) 12.h4?? (12.Bd2 Re8+=) 12...Nh7?? (12...hg5 13.hg5 Nh7 14.g6 fg6 15.Qc2–+) 13.Qd2?? Bg5?? 14.hg5=+ hg5 15.0-0-0 b5 16.Qc2 c6 17.d4+/– cd5?? 18.Qh7 (18.Rh7?! g6 19.Rdh1 bc4+-) 1–0. tata (2000) – bar (1905), net–chess.com, 2008.

4.d3 h6 5.f4 (5.Nf3 Be6=) 5...Be7 (5...Nbd7 6.Nf3=) 6.f5 (6.Nf3 ef4 7.Bf4 a5=) 6...Bd7 (6...d5 7.Nc3=+) 7.Be2 (7.Nf3 a5 8.ba5 0-0=) 7...Nc6 (7...a5 8.ba5 d5 9.Nd2=+) 8.Nh3 (8.Nf3 d5=) 8...Nd4 (8...a5 9.ba5 d5 10.Nd2=+) 9.0-0 c6 (9...a5 10.Bb2=+) 10.Nc3 (10.Be3 Ne2 11.Qe2 d5=) 10...0-0=+ 11.Be3 (11.Rb1 a5=+) 11...Ne2 (11...a5 12.Rb1=+) 12.Ne2 (12.Qe2 d5 13.d4 Bd6=+ (< 13...de4 14.de5 Nd5 15.Ne4+/–)) 12...d5 13.Ng3 d4 14.Bd2 c5 15.bc5 (15.c4 dc3 16.Bc3 Qc7=+) 15...Bc5 16.Qc1 (16.Bb4 Qc7=+) 16...Qc7–/+ 17.Bh6 Ng4?? (17...gh6 18.Qh6) 18.Bg7! Ne3 19.Bf8 Rf8 20.Rf3 f6 21.Nf1 Kf7 22.Rg3 Rg8 23.Rg8 Kg8 24.c3 Ng4 25.Kh1 dc3 26.Qc3 Qd6 27.Qb3 Kg7 28.Qb7 Qd4 29.Qb1 Qg1!! 30.Ng1 Nf2 0–1. carlosfandangos – savage13, ChessWorld.net, 2007.

5.Bb2 Be6 6.Nf3 Be7 7.Bb5 Qd7 8.d4+= ed4 9.Nd4 0-0 10.0-0 a6 11.Bc6 bc6 12.Qd3 Rfb8 13.f4 c5 14.Ne6 fe6 15.Na2 d5 16.ed5 ed5 17.Rad1 cb4=+ 18.Nb4 c6 19.Be5 Bb4=+ 20.ab4 Rb4 21.Qc3 Rc4 22.Qc4 dc4 23.Rd7 Nd7 24.Re1 Re8 25.Ra1 Ne5–/+ 26.fe5 Re5 27.Ra6 Re2 28.c3 Rc2 29.Ra3 Kf7 30.Ra7 Kf6 31.Ra3 g6 32.Kf1 Kg5 33.Ra7 h5 34.Rc7 Rc3 35.Rc6 Rc2 36.g3 Kf5 37.h3 c3 38.Ke1 Rh2 39.g4 hg4–+ 40.hg4 Kg4 41.Rc4 Kh5 ½–½. Coleman,Michael – Krzyzaniak,Michael, Trio, 1999.

5.Bb2 Be7 6.Bc4=.

5.Bb2 Be7 6.Nf3 0-0 7.Bc4 Bg4 8.Be2 Bf3 9.Bf3 Nd4 10.Nd5 Nd5 11.ed5 Nf3 12.Qf3 f5 13.0-0 e4 14.Qb3 Bg5 15.d3+= e3 16.fe3 Be3 17.Kh1 Qg5 18.Rf3 Rae8 19.Rg3 Bc1 20.Bc3 Qh6 21.Rh3 Qf4 22.Rf3 Qh6 23.Rh3 Qf4 24.Rf3 Qh6 ½–½. Luzuriaga,Norberto Horacio – Meisinger,Peter, 1. b4 Thementurnier, 2000.

5.Bb5 a5 6.ba5 Bd7=.

5.Bc4 Be7 6.Nge2 Ne4 7.Ne4 d5=.

4.Nf3 e4 5.Nd4 +=.

4.Nf3 g6 5.d4 (5.Bb2 e4 6.Nd4 Bg7=) 5...e4+= 6.Nfd2 d5 7.e3 (7.Nb3 Bg7=) 7...Bg7 (7...a5 8.b5+=) 8.c4 c6 9.Nc3 Bg4 10.Qb3 0-0 11.c5 (11.b5 Qd7=) 11...Nbd7 12.Qc2 (12.Bg2 Qe7+=) 12...b5 (12...b6 13.Ba6 Rb8 14.cb6 ab6 15.0-0+=) 13.Nb3 (13.h3 Be6+=) 13...Bf3–/+ 14.Rg1 Re8 (14...Ng4 15.a4 a6 16.h4+=) 15.Na5 (15.a4 ba4 16.Nd2 Ng4+=) 15...Qc7 16.Ne2 (16.a4 a6+=) 16...Nf8 (16...Ng4 17.a4 a6 18.h3–/+) 17.Nf4 (17.a4 a6–/+) 17...Ne6 (17...Ng4 18.h4–/+) 18.Be2 (18.a4 a6+=) 18...Bg4 (18...Be2 19.Ne6 fe6 20.Qe2–/+) 19.Bg4 (19.Ne6 fe6 20.Bb2 Be2 21.Qe2 Rf8–/+) 19...Ng4 20.h3 (20.Ne6 fe6 21.Rg2 e5–/+) 20...Nh2 (20...Nd4 21.ed4 Bd4 22.hg4 Ba1 23.Bb2 Bb2 24.Qb2+=) 21.Rh1 Nf3 22.Kd1 Nf4 23.ef4? (better is 23.gf4 Re6 24.Bb2–/+) 23...Bd4 (23...Nd4 24.Qa2–+) 24.Rb1 (24.Bb2 Bb2 25.Qb2 d4–+) 24...Bg7 25.Rb3 (25.a4 d4–+) 25...d4 (25...Nd4!? 26.Qd2 Nb3 27.Nb3–+) 26.Rf3 (26.a4 d3 27.Qa2 Nd4–+) 26...ef3 (26...d3!? 27.Rd3 ed3 28.Qb3–+) 27.Qd3 Qd7 28.Qf3 Rac8 (28...d3 29.f5–+) 29.h4 (29.Bb2 Re3! 30.Qg2 Re6–+) 29...Red8 (29...d3 30.h5 Qd4 31.hg6–+) 30.h5 (30.f5 d3 31.Bg5 Qd4 32.Nc6 Qa1 33.Kd2 Qc3 34.Ke3 d2 35.Kf4 Rd4 36.Nd4 Qd4 37.Qe4 Qf2 38.Kg4 gf5 39.Kh3 fe4 40.Bd2 Qd2–+) 30...Qd5 (better is 30...d3!? 31.hg6 fg6 32.Qe3–+) 31.Qd5 Rd5 (31...cd5?! 32.Nb7 Rd7 33.Nd6=) 32.h6 Bf6 (32...Bf8 33.Kd2–/+) 33.g4 (33.Re1 Kf8–+) 33...d3–+ 34.Bd2 (34.Re1 Kf8–+) 34...Bb2 35.Re1 Kf8 (35...Ba3 36.Nc6 Kf8 37.Ne7+/–) 36.Nb7 Re8 (better is 36...Rc7 37.Nd6 Re7 38.Re7 Ke7–+) 37.Be3?? (better is 37.Na5–+) 37...Ba3 38.f5 (38.Nd6 Re6 39.Bd2 Re1 40.Ke1 Rd4–+) 38...Bb4 39.Rg1 (39.fg6 fg6 40.Bd2 Re1 41.Ke1 Bd2 42.Kd2 b4–+) 39...d2 (better is 39...Re7 40.Nd6 Bc5 41.Bc5 Rc5 42.f6–+) 40.Rg3 (40.fg6 fg6 41.g5 Re4–+) 40...a5 (better is 40...Re4 41.Nd6 Rc5 42.Bd2–+) 41.fg6 hg6 (41...fg6!? 42.Rf3 Kg8 43.Rf4–+) 42.Rh3 Kg8 43.Nd6 Kh7 (better is 43...Re7 44.Rh1 Kh7–+) 44.Ne8+- Bc3 45.Rf3 (45.Nd6 f5 46.gf5 gf5+/–) 45...f5+/– 46.Bg5 (46.Nc7 Re5 A) worse is 47.Bd2 Bd2 48.Kd2 fg4+= (worse is 48...Kh6 49.Re3 Re3 50.fe3+/–); B) 47.g5+/–) 46...b4?? (better is 46...fg4 47.Rc3 Rg5 48.Nf6 Kh6 49.Ng8 Kg7=) 47.Be3 (better is 47.Rc3 bc3 48.Nf6 Kh8 49.Nd5+-) 47...b3–+ 48.gf5 (48.Bd4 b2 49.Nf6 Kh6 50.Rh3 Kg5 51.f4 Kf4 52.Nd5 cd5 53.Rc3 b1Q 54.Kd2–+) 48...gf5 (48...b2 49.fg6 Kg6 50.Rg3 Kf5 51.Rg5 Ke4 52.Rg4 Kd3 53.Rd4 Rd4 54.Bd2 b1Q 55.Bc1 Qb3) 49.Rg3 (49.Nf6 Bf6 50.Bd4 Bd4 51.Rb3 Bc5 52.Rb2–+) 49...b2 50.Rg7 Bg7 (50...Bg7 51.f3 b1Q 52.Ke2 Qe1) 0–1. Lee Wing Kin – Mahadevan,Aravind, Hong Kong Chess Championships, 2017.

4.Bg2 d5 5.Bb2 Nbd7 6.Nf3 =+.

4.Bg2 g6 5.d3 Bg7 6.Bb2 (6.Nf3 e4 7.Nd4 c5=) 6...0-0 (6...Nbd7 7.Nf3=) 7.Nd2 (7.Nf3 a5=) 7...a5 (7...Nfd7 8.c3=) 8.c4 (8.Ngf3 ab4 9.ab4 Ra1 10.Qa1 Be6=) 8...Qe7 (8...Re8 9.b5=) 9.Ngf3 (9.b5 Nbd7=) 9...Nbd7 (9...ab4 10.ab4 Ra1 11.Ba1=) 10.0-0 ab4 (10...Re8 11.Qc2=) 11.ab4 Ra1 12.Qa1 Re8 13.Ne1 (13.Qa5 c6=) 13...Bh6 (13...Nb6 14.Nc2=) 14.Nb3 (14.e3 Bg7=) 14...e4 (14...d5 15.cd5 Qb4 16.Na5=) 15.Nc2 (15.e3 ed3 16.Nd3 Bg7=) 15...ed3 16.ed3 Qe2 17.Qd1 Ng4 (17...Bg7 18.Nbd4 Qd1 19.Rd1=) 18.Nbd4 (18.Qe2 Re2 19.Nbd4 Rd2+=) 18...Qd1= 19.Rd1 Bg7 20.h3 Nh6 (20...Ngf6 21.Re1 c6 22.Kf1+=) 21.Ba1 c6 22.Ne3 Nb6 23.b5+/– c5 24.Nb3 Ba1 25.Na1 Nf5 26.Nac2 Ne3 27.Ne3 Re7 28.Ra1 Kf8 29.g4 Ke8 30.Be4 Kd8 31.Kg2 Kc7 32.f4 f6 33.Kf3 Be6 34.h4 Rd7+= 35.f5 gf5 36.gf5 Bf7 37.Rc1 Re7 38.Kf4+/– Bh5 39.Rg1 Be2 40.Rg2 Bh5 41.Rg8 Be8 42.Bf3 Kd8 43.Nd5 Nd5 44.Bd5 Kc7 45.Rf8 Bd7 46.Rf6 Re1 47.Rf7 Kd8 48.Bb7 Ke8 49.Rh7 Rf1 50.Bf3 d5 51.f6 dc4 52.dc4 Bh3 53.Kg3 Bf5 54.Re7 Kf8 55.b6 (55...Bg6 56.b7 Rg1 57.Kf4+-) 1–0. Basman,Michael J (2405) – Lawton,Geoffrey W, Bristol op, 1980.

4.Bg2 Bg7 5.Bb2 Ne7 6.Nf3 =+.

4.Bg2 Bg7 5.Bb2 Nf6 6.c4 0-0 7.Nc3 Re8 8.d3 Nc6 9.e4 a5 10.b5 Nd4 11.Nge2 Ne2 12.Ne2 Nd7 13.0-0+= Nc5 14.Qc2 c6 ½–½. Keller,Dieter (2420) – Hug,Werner (2445), SUI–ch int Switzerland Biel, 1989.

4.Bg2 Bg7 5.Bb2 Nf6 6.d3 0-0=+ 7.Nd2 a5 8.Ngf3 ab4 9.ab4 Ra1 10.Qa1 Nbd7 11.0-0= Nb6 12.c4 Bd7 13.e4 Na4 14.Ba3 Re8 15.b5 Nc5 16.Qc3 b6 17.Ra1+= Ng4 18.Bb4 f5 19.Ra7 Qb8 20.Ra2 ½–½. Bendig,Frank – Dopper,Johan, corr SOK–92–91, 1992.

4.Bg2 Bg7 5.Bb2 Nf6 6.Nf3 e4 7.Nd4 c5=.

3.Bb2 (--> 1.b4 e5 2.Bb2 Bd6 3.a3).

4.Nc3 0-0=.

4.d3 a5 5.b5 =+.

4.d3 Nc6 5.Bb2 a5 6.b5 Nd4 7.Bd4 ed4 8.Nf3 Bc5 9.Be2 Ng4 10.h3 Nf2 11.Kf2 Qf6 12.Rf1 Qg6 13.Kg1 Qg3 14.a4 c6 15.Qe1 Qg6 16.Ne5 Qg5 17.Nf7 Qg6 18.Nh8 Qe6 19.Bh5 g6 20.Bg4 Qe5 21.Nf7 Qg7 22.e5 Bb4 23.Qe4 cb5 24.e6 de6 25.Be6 Be6 26.Qe6 1–0. pillsbury (2150) – jomunoz (1990), net–chess.com, 2014.

4.d3 Nc6 5.Nc3 a6 (5...Be7 6.Nf3=) 6.Nf3 h6 (6...0-0 7.Be2=) 7.h3 (7.Be2 Be7+=) 7...Nd4 (7...Be7 8.d4 ed4 9.Nd4=) 8.Nd4 ed4 9.Ne2 Be5 (9...a5 10.Bd2 c5=) 10.Bf4 (better is 10.f4 Nh5 11.fe5 Qh4 12.g3 Ng3 13.Ng3 Qg3 14.Ke2 Qe5 15.Qd2+/–) 10...Bf4=+ 11.Nf4 c5 (11...0-0 12.Qf3=+) 12.bc5 (12.e5 Nh7=) 12...0-0 (12...Qa5 13.Qd2 Qc5 14.Qb4=) 13.Be2 (13.Ne2 Qa5 14.Qd2 Qc5=) 13...d6 (13...Qa5 14.Qd2 Qc5 15.0-0=) 14.cd6+= Qd6 15.Qd2 Qe5 (15...b5 16.0-0+=) 16.0-0 Bd7 (16...b5 17.Rfc1+=) 17.Bf3 (17.a4 Qg5+=) 17...Bc6 (17...Rac8 18.Ne2+=) 18.a4 (18.Rfc1 Rac8+=) 18...g5 (18...Rac8 19.a5+=) 19.Nh5 (19.Ne2 Rac8+/–) 19...Nh5 20.Bh5 Rae8 21.Bg4 Re7 22.f4 gf4 23.Rf4 Qg5 24.Qf2 Bd7?? 25.Qf3 Qa5 26.Bd7+- Rd7 27.Rg4 Kh7 28.Qf6 Rg8 29.Rg8 Qh5?? 30.Qg7 (30.Rh8) 1–0. pillsbury – mduerr (1620), net–chess.com, 2007.

3.Nc3 d5 4.d3 ed3 (4...Nf6 5.de4 Ne4 6.Ne4 (worse is 6.Nd5 Be6 7.f3 Bd5 8.fe4 Qh4 9.g3 Qe4–/+) 6...de4 7.Qd8 Kd8 8.Bb2=) 5.cd3 (5.Qd3 Nf6+=) 5...d4 (5...Nf6 6.Nf3=) 6.Ne4+= f5 7.Nd2 c5 8.bc5 Bc5 9.g3 (9.Qc2 Be7+=) 9...Nc6 (9...Nf6 10.Bg2 0-0 11.Qb3 Kh8 12.Nh3=) 10.Bg2 (10.Qc2 Bb6=) 10...Bb6 (10...Nf6!?=) 11.Nh3+= Nf6 12.Nc4 Be6 13.0-0 0-0 14.Ng5 Bd5 15.Bd5 Qd5 (worse is 15...Nd5 16.Ne6 Qe7 17.Nf8 Kf8 18.Qb3+/–) 16.Rb1 Nd7 17.a4 h6 (17...Nc5 18.Rb5 Bd8 19.e4 fe4 20.Ne4+/–) 18.Rb5 Bc5 19.e4 fe4 20.Ne4 b6 21.Bf4 Rae8 22.Re1 Qe6 (22...Nde5 23.Ne5 Ne5 24.Be5 Re5 25.f4+=) 23.Bd2 White prepares a5 23...Qg6 24.f4 Re7 (24...a6 25.Rb1+/–) 25.a5 a6 26.Rb6 (26.Nc5 A) worse is 26...Nc5 27.Rb6 Re1 28.Qe1+- (28.Be1?! Nd3 29.Qb3 Qe6+=); B) 26...ab5 27.Nd7 Rd7 28.Nb6 Re7 29.Qb3 Kh7 30.Re7 Ne7 31.Qb5 Nc6=) 26...Bb6 27.ab6 (27.Nb6?! Nf6 28.Qc2 Ng4+=) 27...Nf6 28.Qf3 Ng4 29.Ncd6 White plans f5 29...Kh7 (29...Rb8!? 30.Rb1 Ne3+-) 30.Qe2+- Rd8 31.f5 Qh5 32.Bf4 Nb4 33.f6 Red7 (33...gf6 34.Nf6! Kg6 35.Nh5 (35.Qe7?? Qh2 36.Kf1 Qf2) 35...Re2 36.Re2 Nd3 37.b7+-) 34.b7 Nd5 35.f7 Nf4 36.gf4 Rb8 37.Rc1 Re7? (37...Qh3 38.Rb1 Qe3 39.Qe3 de3+-) 38.Rc5 (38.Rc8 Reb7 39.f8Q Rb1 40.Kg2 Qh2 41.Kf3 Ne5 42.fe5 Qh5 43.Kf4 Qh4 (43...Qe2?? 44.Qf5 g6 45.Qd7) 44.Kf5 Qh3 45.Kf4 Qh4 46.Kf5 Qh3 47.Kf4 Qh4=) 38...Qc5 39.Nc5 Re2 40.Nd7 Rb7 41.Nb7 1–0. glovio (2315) – vulpecula (2090), gameknot.com, 2015.

3.d3 Nf6 4.Nc3=.

3.d4 d5 4.e3 (---> 1.b4 e5 2.a3 d5 3.d4 e4 4.e3).

3.e3 f5 4.Nc3 Nf6 5.Bb2 d5 6.h3 (6.Nb5 Nbd7=) 6...c6 7.Nge2 Bd6 8.Nd4 0-0 9.d3 Qe7 10.de4 fe4 11.Qd2 Be6 12.Ne6 Qe6 13.Ne2 Nbd7 14.Nd4 Qf7 15.c4 Ne5 16.c5 Bc7 17.Be2 Rae8 18.0-0-0 (18.0-0 Bb8=) 18...a5 19.Nb3 (19.f4 Nd3 20.Bd3 ed3 21.Qd3 Ne4=+) 19...ab4-/+ 20.ab4 Ra8 21.Kc2 (21.f4 Nc4 22.Bc4 dc4 23.Bf6 cb3-/+) 21...Ra4 (21...Nd3!? 22.f4-+) 22.Ra1-/+ Rfa8 (22...Ra1 23.Ra1 Qg6 24.Bf1-/+) 23.Ra4 Ra4 24.Ra1 Ra1 25.Ba1 g5 (25...Qg6!? 26.Bf1 Nc4=+) 26.Nd4 Qe8 (26...Nfd7 27.f4 ef3 28.gf3 Qg6 29.Kc1=) 27.Nf5 (27.Kd1 Ned7+=) 27...Qd7 28.g4 Kf7 29.Bd4 Qc8 30.Qc3 Qb8 31.b5 Nfd7 32.b6 Bd8 33.Nd6 Ke6 34.f4 (34.Kd1 Be7 35.Nf5 Qf8 36.Ne7 Qe7=) 34...ef3 35.Bd3 f2 (35...Nd3?? 36.Qd3 Qd6 37.Qf5 Ke7 38.Qh7 Ke6 39.Qg8 Ke7 40.cd6 Kd6 41.Qd8+-) 36.Bf5 Ke7 37.Bd3 Qa8?? (37...Nf7 38.Nf7 Kf7 39.Qd2-/+) 38.Kb2?? (better 38.Be5 Ke6 39.Bd4+-) 38...Nd3?? (better 38...Bb6 39.Nf5 Kf7 40.Be5 A) 40...Bc5? 41.Bd6 Qa3 42.Qa3 Ba3 43.Ba3+-; B) 40...Ne5?? 41.Qe5 (41.cb6?! Nd3 42.Qd3 Qa5=) 41...Qf8 42.Nd6 Kg8 43.cb6+-; C) 40...Nc5 41.Nd6 Kg8 42.Bh7 Kh7 43.Qc2 Ne4 44.Ne4 Qa1 45.Kb3 Qe5 (45...de4 46.Qe4 Kh6 47.Ba1 f1Q 48.Qe6 Kh7 49.Qd7 Qf7 50.Qf7 Kh6 51.Qh5) 46.Ng5 Kg7 47.Qh7 Kf6 48.Qh8 Kg6 49.Qh5 Kg7 50.Qh7 Kf6 51.Qh8 Kg6 52.Qh5 Kg7 53.Qh7=) 39.Qd3+- Nf8 (39...Bb6 40.Qh7 Kd8 41.Qg8 Kc7 42.Qa8 Bc5 43.Ne8 Kb6 44.Bc3 Bb4 45.Bb4 c5 46.Qa5 Kc6 47.Qa4 b5 48.Qa8 Kb6 49.Ba5) 40.Qf5 (40.Bf6 Kd7 41.Qf5 Ne6 42.Qh7 Ng7 43.Qg7 Ke6 44.Qf7) 40...Bb6 (40...Qa1 41.Ka1 f1Q 42.Qf1 Kd7 43.Qf5 Ne6 44.Qf7 Be7 45.Qe8) 41.Qf7 (41.Bf6) 41...Kd8 42.Qe8 (42.Bf6) 42...Kc7 43.cb6 (43.Nb5 cb5 44.Be5) 43...Kd6= 44.Qe5 Kd7 45.Qf5 (better 45.Qg7 Ke8 46.Qe5 Kd7 47.Qg7 Ke8 48.Qe5 Kd7=) 45...Ne6-+ 46.Qf7 (46.Qf2 Qf8 (46...Nd4?! 47.Qf7 Kd6 48.ed4=) 47.Qc2 Qb4 48.Kc1 c5 (worse 48...Nd4 49.Qh7 Kd6 50.ed4 Qc3 51.Kb1-/+) 49.Qh7 Kd6-+) 46...Kd6 47.Qf2 Nd4 (better 47...c5!? 48.Qh2 Kc6-+) 48.ed4-/+ c5?? (better 48...Qd8 49.Kc2 Qe7-/+) 49.Qf6+- (49.dc5?! Kc6 50.Qf6 Kc5 51.Qe7 Kb5 52.Qd7 Kc4 53.Qh7 Qa6 54.Qc2 Kb5 55.Qe2 Kb6 56.Qe3 Kc6 57.Qg5 Qe2 58.Kc3 Qf3 59.Kd4 Qe4 60.Kc3 Kc5=) 49...Kd7 50.Qf7 (better 50.Qg7 Ke6 51.Qh6 Kf7 52.Qh7 Kf6 53.Qf5 Kg7 54.Qg5 Kh7 55.Qh5 Kg7 56.Qe5 Kg6 57.dc5+- (57.Qd5?! cd4 58.h4 Qa4+-)) 50...Kc6 (50...Kd6 51.Qc7 Ke6 52.Qe5 Kf7 53.Qd5 Kf6 54.Qf5 Kg7 55.Qg5 Kf7 56.Qf5 Kg7 57.Qc5 Qa6+-) 51.Qe6 (better 51.Qc7 Kb5 52.Qc5 Ka6 53.Qa3 Kb6 54.Qa8+-) 51...Kb5= 52.dc5 (52.Qd5 Qf8 53.dc5 Qc5 54.Qb7 h6=) 52...Kc4 (52...Qh8!? 53.Kb3 Qd4 54.Qd7 Kc5 55.Qb7 Qb4 56.Kc2 Qb6 57.Qh7 Kb4=+) 53.Qe2= Kb4 54.Qc2 (54.Qe1 Kc5 55.Qe7 Kc4 56.Qh7 Qa6 57.Qc2 Kb5 58.Qd3 Kb6 59.Qe3 Kc6 60.Qg5 Qe2 61.Kc3 Qf3 62.Kd4 Qe4 63.Kc3 Kc5=) 54...Kb5 (54...Qa3 55.Kb1 Qh3 56.c6 Qg4 57.cb7+-) 55.Qb3 (55.Qh7 Qa5 56.Qb7 Qd2 57.Kb1 Qd1 58.Ka2 Qc2 59.Ka1 Qd1 60.Kb2 Qd2 61.Kb3 Qd3 62.Kb2 Qd2=) 55...Kc6=+ 56.Qc3 (56.Qg3!? Qf8 57.Qc7 Kb5 58.Qb7 Qc5 59.Qh7 Qb6 60.Qd3 Kc6 61.Kc2 Qf2 62.Kd1=+) 56...Qa4 57.Qf6 (57.Qf6 Kc5 58.Qe7 Kb6 59.Qd8 Ka7 60.Qd5-/+). TwelveTeen (2450) - littleplotkin (2550). lichess.org, 2018.

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

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

3.Bb2 f5 4.e3 d6 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 e4).

4.ed3 Qf6 5.Ra2 Ne7 6.Nf3?? Qe6–+ 7.Qe2 Qa2 8.Nc3 Qe6 9.Be3 h6 10.Nd4 Qf6 11.Ne4 Qg6 12.g3 d6 13.Bg2 a6 14.0-0 Nbc6 15.Nb3 Nf5 16.Bd2 Be6 17.c4 Ncd4 18.Nd4 Nd4 19.Qd1 Be7 20.f4 0-0 21.h3 f5 22.Be3 Nc6 23.g4 fe4 24.f5 Bf5 25.gf5 Rf5 26.Rf5 Qf5 27.de4 Qf7 28.e5 Rd8 29.Bd5=+ de5 30.Bf7 Kf7 31.Qh5 Kg8 32.b5 ab5 33.cb5–/+ Nd4 34.Bd4 Rd4?? 35.Qe5+- Rd1 36.Kf2 Bh4 37.Kg2 Rd2 38.Kf3 Rd3? 39.Kg4 g5 40.Qe6 Kg7 41.Qe7 Kg8 42.Kh5 Rd5 43.Qe6 (43...Kf8 44.Qd5+-) 1–0. Gaudissimo (1705) – Rickytan (1620), internet, 2007.

4.ed3 Qf6 5.c3 a5 6.b5 a4 7.d4 c6 (7...Qe7 8.Qe2=) 8.Nf3 cb5 (8...d5!?+=) 9.Bb5+/– Ra5 (9...Qe6 10.Be3+/–) 10.Ba4 (better is 10.0-0+-) 10...b5 11.Bb3 (11.Qe2 Qe7 12.Bd1 Bb7+/–) 11...Nc6 (11...Bb7 12.a4+/–) 12.Qe2 Qe6?? (12...Nge7 13.Bg5 Qg6 14.Bd5+/–) 13.Qe6 (better is 13.Be6 de6 14.d5+-) 13...de6+/– 14.0-0 f5 15.Ng5 Nd8 16.Re1 Ra6 17.d5 h6 18.Ne6 Ne6 19.de6 Be7 20.Bf4 h5 21.a4 Bc5 22.Bg3 g5 23.Be5 Rh6 24.Nd2 ba4 25.Ba4 Ke7 26.Bd4 Ra5?? 27.Nb3 Bd4 28.cd4 Ra6 29.d5 Nf6 30.Re5 Ne4? 31.Rf5 Rf6 32.Nd4 h4 33.Nc6 Kf8 34.Rf6 Nf6 35.e7 Kf7 36.d6 Bd7 37.Bb3 (37...Kg6 38.Ra6+-) 1–0. jimmyjf – breaker, ChessWorld.net, 2004.

4.ed3 Nf6 5.Nf3=.

3.e3 d5 4.Bb2 Nd7 5.c4 c6 6.Nf3 Qc7 (6...Bd6 7.cd5 cd5 8.Bb5=) 7.Qc2 Bd6 8.c5 Be7 9.d4 e4 10.Nfd2 Ngf6 11.Nc3 0-0 12.0-0-0 (12.Be2!?=) 12...a5 13.b5 cb5 14.Bb5 Nb8 15.h3 b6 16.Na4 bc5 17.dc5 Nc6 (17...Nbd7 18.Nb3–/+) 18.Nb3 (better is 18.Nb6!? Be6 19.Na8 Ra8 20.Nb3+=) 18...Rb8+= 19.Bc6 Qc6 20.Na5 (20.Nb6!?–/+) 20...Qb5 21.Nc3? (better is 21.Bc3 Ra8 22.Rd4–+) 21...Qa5 22.Nd5 Nd5 23.Rd5 Be6 24.Rhd1 Bd5 25.Rd5 Rfc8 (25...Rfc8 26.Qc3 Qc3 27.Bc3 Bc5–+) 0–1. combijack (1755) – reodoi (1695), gameknot.com, 2012.

3.e4 d6 4.d4 (4.Nf3 Nf6 5.Nc3 0-0= 6.Be2 Nc6 7.d4 ed4=; 4.Nc3 Nf6 5.Nf3 Nbd7 6.Bc4 c6 7.d4 b5=; 4.Bc4 Nf6 5.Nc3 Ne4 6.Ne4 d5 7.Qh5 0-0=) 4...Nc6 (4...ed4 5.Nf3=+ (< 5.Qd4 Bf6 6.e5 Be5–+ 7.Qe3 Qe7–+) 5...Bg4 6.Qd3 c5 7.Nbd2 Nc6=+) 5.Bb5 (5.d5 Nb8= 6.Bd3 Nf6 7.Nf3 a5=) 5...Bd7 (5...ed4 6.Nf3= Bg4 7.Bb2 Bf6=) 6.d5+= Nd4? (better is 6...Nb8 7.Bd7 Qd7= (7...Nd7=)) 7.Bd7+- Qd7 8.c3 Nb5 9.a4 Nf6 10.f3 0-0 11.ab5 Qb5 12.Ne2 Nh5 13.Na3 Qd7 14.0-0 f5 15.ef5 Qf5 16.Nb5 Bd8 17.c4 a6 18.Nbd4?? ed4+/– 19.Nd4 Qd7 20.Ne6 Rf7 21.Qd3 Bf6 22.Ra2 Be5? 23.Ng5 Rf5 24.g4 Nf4?? 25.Qf5 Qf5 26.gf5 Rf8 27.Bf4 Rf5 28.Be5 Rg5 (29.Bg3 h5+-). hasant (1915) – tata (2000), net–chess.com, 2008.

4.d4 ed4 5.Bd4 Nf6 6.e3 0-0 7.Nf3 Nc6=.

4.e4 Nf6 5.Nc3 0-0 6.Nf3 Nc6 7.Bc4 Bg4=.

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

4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 e4 8.c3 d5 9.e3 Ne7 10.Ne2 Bd7 11.Na3 c5 12.bc6 Nbc6 13.Nb5 0-0 14.Ned4 Nf5 15.Be2 Bd4 16.cd4 Qg5 17.g3 Qe7 18.0-0 Nb4 19.Qb3 Bb5 20.Bb5 Rc8 21.Bb2 Nc6 22.Qd5 g6 23.Qb3 Qb4 24.Qb4 Nb4 25.Rc1 Rc1 26.Bc1 Nd6 27.Be2 Nd5 28.Ba3+/– Nf5 29.f3 Nf6 30.fe4 Ne4 31.Bb4 h5 32.Bf3 Nfd6 33.Bg2 f5 34.d3 Kf7 35.de4 Ne4 36.Be4 fe4 37.h4 Ke6 38.Kg2 Kd5 39.g4 Kc4 40.Bc5 b5 41.gh5 gh5 42.Kg3 b4 43.Kf4 1–0. Satka,Martin – Zelinski,Heinz, 9sen.Brandenburg op, 2000.

4.Nc3 d5 5.e3 Nh6 6.Nge2 Bg4 7.h3 Be2 8.Qe2 0-0 9.Qb5+= d4 10.Ne4 b6 11.g4 c6 12.Qc4 b5 13.Qe2 Bh4 14.Bg2 Nd7 15.ed4+/– ed4 16.Bd4 f5 17.Nd6 Nf6? 18.Bc5+- Qd7 19.0-0-0 a5 20.Rde1 ab4+/– 21.Bb4 fg4 22.hg4+- Bg5 23.Qe5 Qg4 24.Bc6 Rad8 25.Rhg1 Bf4 26.Qb5 Qh4 27.Ne4 Ne4 28.Be4 Qf2 29.Bd3 Kh8 30.Bc3 Ng4? 31.Ref1 Qa7 32.Rg4 Bh6 33.Rf8 Rf8 34.a4 Rc8 35.Re4 Qa8 36.Bb2 Rf8 37.Qh5 Qc6 38.a5 Kg8 39.a6 Qb6 40.Bd4 Qd6 41.Qc5 Qh2 42.Qd5 Kh8+- 43.Re2 Qb8 44.Rf2 Rd8 45.Qe4 (45...Qb1 46.Kb1 Rb8 47.Ka2 Rb2 48.Kb2 Bd2 49.Qh7#) 1–0. Vera,Gajardo Jorge L (2020) – Dias,Joao Batista (2100), Sao Paulo Communic 1st, 2004.

4.e3 d5 5.c4 dc4 6.Bc4 Nc6 7.h3 Bf5 8.Nf3? Bb1?? 9.Rb1 e4= 10.Ng1 Bb2=+ 11.Rb2 Nf6 12.Ne2 0-0 13.Nc3 Ne5 14.Be2 Nd5 15.Nd5 Qd5=+ 16.0-0 c6 17.Qc2 Rad8 18.Rd1 h6 19.f4? Nd3 20.Bd3 Qd3–/+ 21.Qd3 Rd3 22.Kf2 Ra3 23.Rc1 Rd8 24.Rc4 f5 25.g4 fg4 26.hg4–/+ Re8 ½–½. mgriffin (1870) – shawk (1645), net–chess.com, 2001.

4.e4 c6=.

4.e4 d5=.

4.e4 Ne7 5.Nf3 Ng6 6.Bc4 d6 7.d3 Nd7 8.0-0 Nb6 9.Bb3 Bg4 10.Nbd2 Qd7 11.Qe1 Nf4 12.Qe3 h5 (12...Na4 13.Ba4 Qa4 14.Rfc1=) 13.d4+= g5 (better is 13...0-0-0!?+=) 14.de5+/– Bf3 15.e6 (15.ef6 Bg2 16.Rfe1 Qg4–/+; 15.Qf3?! Be5 16.Be5 de5=; 15.Nf3?! Qg4 16.g3 Nh3 17.Kh1 Bg7+-) 15...fe6 16.Bf6 Rh6?? (better is 16...Rf8 17.Bg5 Bg2 18.Bf4 Bf1 19.Kf1 a5+-) 17.Bg5+- (17.Nf3?! Rf6 18.e5 Rf5+=; 17.Qf3?! Rf6 18.e5 de5+=) 17...Rg6 (17...Ne2 18.Kh1 Bg2 19.Kg2+-) 18.Qf4 (18.Nf3 e5 19.Bf4 ef4 20.Qf4 Qg7+-) 18...Bg2 (18...e5 19.Qf3 (worse is 19.Nf3 ef4 20.Kh1 a5–/+) 19...Rg5 20.Rad1+-) 19.Kg2 e5 (19...Qg7 20.h4+-) 20.Qg3 Nc8 (20...Qg7 21.Nf3+-) 21.f4 Ne7 (21...h4 22.Qh4 Qg7 23.Qh5 ef4 24.Rf4+-) 22.fe5 (better is 22.f5 Nf5 23.Rf5 Qg7+-) 22...0-0-0 23.e6 (better is 23.ed6!? Qd6 24.Qd6 Rdd6+- (24...Rgd6?? 25.Nf3 Ng6 26.Bd8 Kd8 27.Ng5+-)) 23...Qc6 24.h4 d5 (24...Rdg8 25.Qf3 Re8 26.Qf7+-) 25.ed5 Nd5 26.Kh2 Qe6 (26...Nf6 27.Qf4 Rd6 28.e7+-) 27.Qh3 Qh3 28.Kh3 Rdd6 29.Ne4 Rde6 (29...b5 30.Rf8 Kb7 31.Rh8+-) 30.Bd5 (better is 30.Rf8 Kd7 31.Rd8 Kc6 32.Bd5 Kb6 33.Be3 c5 34.Rd7 Rg3 35.Kg3 Rg6 36.Kh3 Rc6 37.Bc5 Kb5 38.a4 Ka6 39.Bc4 b5 40.Ra7) 30...Re5 31.Rf8 Kd7 (31...Re8 32.Re8 Kd7 33.Rd8) 32.Rd8 1–0. Frank,Detlev – Haack,Michael, Pinneberg–ch, 2003. (=1.a3 e5 2.b4 Be7 3.Bb2 Bf6)

5.c4 d4 6.e4 de3 7.de3 Qd1 8.Kd1 Be6 9.Nf3 Nd7 10.Be2 0-0-0 11.Nbd2 g5 12.h3 Ne7 13.Kc1 h6 14.Rd1 Bg7 15.Bc3 Ng6 16.Nb3 f5 17.Bd3 Rhf8 18.Bb4 e4 19.Nfd4 Rfe8 20.Be2 Nh4 21.Bh5 Bc4=+ 22.Be8 Re8 23.Rb1 Ne5 24.g3 Nd3 25.Rd3 Bd3 26.gh4 Bb1 27.Nf5 Ba2 28.Ng7 Rg8 29.Nf5 Bb3 30.Ne7 Kd7 31.Ng8 Bg8 32.hg5 hg5 33.Kd2 Bc4 34.a4 Bb3 35.a5 Bc4 36.b6 cb6 37.ab6 ab6 38.Kc3 Be2 39.Kd4 Bf3 40.Kd5 b5 41.Ke5 Bg2 42.Kf5 b6 43.Kg5 Bh3 44.Kf4 Bg2 45.Kf5 Kc6 46.Ke5 Bf3 47.Ke6 Kc7 48.Kd5 Kd7 49.Ke5 Ke8 50.Ke6 Kd8 51.Ke5 Bg2 52.Kd6 Kc8 53.Ke5 Bf3 54.Ke6 Kb7 55.Kd6 Ka6 56.Kd5 Ka7 57.Kd4 Kb7 58.Kd5 Kb8 59.Kc6 Kc8 60.Kd5 Kc7 61.Ke5 Bh1 62.Kd5 Bg2 63.Kd4 Kd8 64.Kd5 Ke8 65.Ke5 Kf7 66.Kd5 Kf6 67.Kd4 Bf3 68.Kd5 Kf5 69.Kd4 Ke6 70.Bc3 b4 71.Bb4 Kf5 72.Bd6 b5 73.Kd5 Kf6 74.Bb4 Kg5 75.Ke5 Kg4 76.Be7 Kh5 77.Bb4 Kg5 78.Bc5 Kg6 79.Bb4 Kh5 80.Kf5 Kh6 81.Ke5 Kg6 82.Bc5 Kg5 83.Bb4–/+ Kh4 84.Kf5 Kh3–/+ 85.Ke5 Kg2 86.Kd4 Kf2 87.Bc5 Ke2 88.Kc3 Kd1 89.Kb4 Be2 90.Kc3 Bd3 91.Kb2 Kd2 92.Kb3 Bc4 93.Kb4 Ke2 94.Kc3 Be6 95.Bd4 Kd1 96.Bc5 Bd5 97.Kd4 Bc6 98.Bd6 Ke2 99.Bc5 Bb7 100.Kc3 Bd5 101.Bd4 Be6 102.Bc5 Kd1 103.Kd4 Bf5 104.Bd6 Kd2 105.Bb4 Ke2 106.Bc5 Ke1 107.Bb4 Kf2 108.Bc5 Ke2 109.Kc3 Bg4 110.Bd4 Kd1 111.Bc5 Be2 112.Kd4 Bf3 113.Bb4 Ke2 114.Bc5 Kd2 115.Bb4 Kd1 116.Kc3 Bg2 117.Kb2 Ke2 118.Bc5 Kd3 119.Kb3 0–1. Fritz 5.32 – Fritz 6, 2004.

5.c4 e4 6.Qc2 Bb2 7.Qb2 Nf6=.

5.c4 e4 6.Bf6 Nf6 7.cd5 Qd5=.

5.e3 c5=.

5.e3 Nh6 6.Nc3 0-0 7.Nce2 c5 8.d3 Qa5 9.Bc3 Qb5 10.d4 Re8 11.de5 Be5 12.Nd4? Qd7–+ 13.Bb5 Nc6 14.Ngf3? cd4 15.Ne5 Re5 16.Bd4 Rg5 17.g3 Qe6 18.Be2 Nd4 19.Qd4 Qe4 20.f3 Qd4 21.ed4 Bh3 22.Bd3 Re8 23.Kf2 f5 24.Rhe1 Re1 25.Re1 Kf7 26.Re5 Rg6 27.Rd5 Ke7 28.Bc4 Rd6 29.Re5 Kd8 30.d5 a6 31.a4 g5 32.a5 Nf7 33.Re1 h5 34.Bb3 f4 35.c4 Rd7 36.gf4 Re7 37.Re7 Ke7 38.fg5 Ng5 39.Kg3 Bd7 40.Bc2 Nf7 41.f4 Kf6 42.Bd3 Ba4 43.Be2 Bb3 44.Bd3 Nd6 45.c5 Nf5 46.Bf5 Kf5 47.c6 bc6–/+ 48.dc6 Be6 49.c7 Kg6 50.Kf3 h4 51.Ke4 Kf6 52.Kf3 h3 53.Ke4=+ Bc8 54.Kf3 Bf5 55.Kg3 Ke7 56.Kh4 Kd6 57.Kg5 Bd7 58.f5 Kc7 59.Kg6 Kd6 60.f6 Be6 61.f7 Bf7! 62.Kf7 Ke5 63.Kg6 Kf4 64.Kh5 Kf3 65.Kh4 Kg2 66.Kg5 Kh2 67.Kf4 Kg2 68.Kg5 h2 0–1. Satka,Martin – Henniges,Erhard, 10sen.Brandenburg op, 2001.

5.Nf3 Nd7 6.e3 Ne7 7.Be2 e4 8.Nd4 0-0 9.0-0 Nf5 10.Bg4 Nc5 11.Ra2 Nd4 12.Bd4 Bg4 13.Bf6? Bd1 14.Bd8=+ Be2 15.Be7 Bf1 16.Kf1 Na4 17.Bf8 Rf8 18.d3 f5 19.Ke2 Kf7 20.c4 ed3 21.Kd3 dc4 22.Kc4 Nb6 23.Kc5 c6 24.Rd2 cb5 25.Kb5 g5 26.Rd4 Re8 27.Nd2 Re5 28.Kb4 a5 29.Kc3 h5 30.h4 g4 31.Kd3 a4 32.e4 Kf6 33.f4 gf3 34.gf3 Re7 35.f4 fe4 36.Ne4 Kf5 37.Nd6 Ke6 38.f5 Ke5= 39.Ne4 Rd7 40.Rd7 Nd7 41.Ng3 Kf4 42.Nh5= Kf5 43.Ng7 Kg6 44.Ne6 Kh5 45.Kc4 Kh4 46.Kb5 b6 47.Ka4+/– Kg4 48.Kb5 Kf5 49.Nc7 Ne5 50.Nd5 Ke4 51.Nb6+- Nf3 52.a4 Nd4 53.Kc4 Nc6 54.Nd7 Kf5 55.Kd5 Ne7 56.Kd6 Nc8 57.Kc7 Ne7 58.a5 Nd5 59.Kd6 Nb4 60.Kc5 Nd3? 61.Kc4 Nb2 62.Kd4 Ke6 63.a6 Kd7 64.a7 Nd3 65.Kd3 Kd6 66.a8Q Ke6 1–0. Fritz 8 – EXchess 3.11, 2004.

6.Nd4 c5 7.bc6 Qb6 –+ (7...bc6?! 8.Ra2=+; 7...Nc6?! 8.e3=+).

6.Nd4 c5 7.bc6 Qb6 8.Ra2 Bd4 9.Bd4 Qd4 10.cb7 Bb7 11.e3 Qb6 12.Nc3 Nf6 13.Bb5 Nbd7 14.0-0 0-0 15.Qa1 Rfc8 16.Rb1 Qd6 17.Rab2 Ne5 18.Be2 Ba6 19.Ba6 Qa6 20.Rb5 Qd6 21.R1b4 a5 22.Rb6 Qd8 23.Rb1 Nc4 24.Rb7 d4 25.ed4 Qd4 26.Nb5 Qd2 27.Nc7 Ng4 28.Ne6 Qf2 29.Kh1 Nce5 30.h3 0–1. Doctor? 3.0 – Comet B50, 2005.

7.Nc4 Be6 8.Na5 c5 9.Nb3 Qb6 10.a4 c4 11.Nc1 a6 12.Ra3 ab5 13.ab5 Ra3 14.Na3 Qa5 15.e3 c3 16.Nc4 cd2 17.Qd2 Qd2 18.Kd2 Bc4 19.Bd4 Bf1 20.Rf1 Bd4 21.ed4 Nf6 22.f3 Kd8 23.fe4 Ne4 24.Kd3 Nf6 25.d5 Re8 26.Rf5? Nbd7 27.c4 Re4 28.Kc3 Nb6 29.Kb2 Rc4 30.Rg5 g6 31.Re5 Rb4 32.Kc2 Rb5 33.Kd3 Ng4 34.Rg5 (34.Re1 Rd5 35.Kc2 Nc4–+) 0–1. Doctor? 3.0 – Fritz 5.32, 2004.

7.f4 Be6 8.c3 Bh4–/+ 9.g3 f6 10.e3 fe5 11.Qh5 Bf7 12.Qh4 Qh4 13.gh4 ef4 14.ef4 Nf6 15.cd4+= a6 16.a4 ab5 17.ab5 Ra1 18.Ba1 Nbd7 19.Bb2 Nd5 20.Rg1+= 0-0 21.f5 N7f6 22.Rg3 Ne7 23.Bh3 Bc4 24.Ba3+= Nfd5 25.Be7 Ne7= 26.Rc3 Bb5 27.f6 Rf6 28.Rc7 Nf5 29.Nc3 Nd6 30.h5 Kf8 31.Nb5 Nb5 32.Rb7 Nd4 33.Rb8 Ke7 34.Rb7 Kd6 35.Rg7+= h6 36.Rg6+/– Ke5 37.Bg2 Nc2 38.Kd1+- Nd4 39.Rg4 Rf4+= 40.h3 Nb3 41.Rg8 Nc5 42.Ke2+/– Ne6 43.Ke3 Nc7 44.Rh8 Nd5 45.Ke2 Rf7 46.Ke1 Rc7 47.d3 ed3 48.Bd5 Kd5 49.Kd2 Kc4 50.Rh6+/– Ra7 51.Rc6 Kd4 52.Rd6 Ke4 53.h6 Ra2 54.Kc3 ½–½. Crafty 19.01 – Fritz 6, 2005.

7.f4 Be6 8.c3 Bh4–/+ 9.g3 f6 10.e3 fe5 11.Qh5 Bf7 12.Qh4 Qh4 13.gh4 ef4 14.ef4 Nf6 15.cd4+= a6 16.a4 ab5 17.ab5 Ra1 18.Ba1 Nbd7 19.Nc3 Nb6 20.Bg2 Bd5= 21.Bb2 c6 22.bc6 bc6 23.0-0 Kf7 24.Ra1 Nc4 25.Ra7 Kg6 26.Nd5 cd5 27.Bc3 Rb8 28.f5 Kh6 29.Kf2 Rb3 30.Rc7 Nd6 31.Bh3 Nb5 32.Rb7 Nd4!? 33.Rb3 Nb3 34.Bg2 Nc1 35.Bf6 gf6 36.Ke3=+ Kh5 37.Kd4 Nd3 38.Kd5 Nf4–+ 39.Ke4 Ng2 40.d4 Nh4 41.Kf4 Ng2 42.Kf3 Ne1 43.Ke4 Kg5 44.h3 Ng2 45.d5 Nh4 46.d6 Nf5 47.d7 Nd6 48.Ke3 Nf7 49.Kf2 Kf5 50.Kg3 0–1. Crafty 19.01 – Fritz 6, 2005.

7.f4 Be6 8.e3!? de3 9.Qe2=.

7.f4 Be6 8.e3!? Be5 9.fe5 de3 10.Qe2 =+.

7.f4 Bh4 8.g3= Be7 9.e3 de3 10.Qe2 Bf5=.

7.f4 Bh4 8.g3= Be7 9.Bg2 f6 10.Nc4 a6 11.ba6 b5 12.Na5+= Bf5 13.a4 b4 14.Nb3+= c5 15.e3 de3 16.0-0 Nh6+= 17.de3 Qd1 18.Rd1 c4 19.Nd4 c3 20.Bc1 Bg6 21.f5 Nf5 22.Be4 Nd4 23.Ba8 Ndc6 24.e4 Be4+/– 25.a7 Bc5 26.Kf1 Ba7 27.Re1 f5 28.Bf4 Kf7 29.Bb8 Rb8 30.Re4 Ra8 31.Rc4 Rc8 32.a5 Ke6 33.Ra4 Kd7 34.a6 Rb8 35.h3 Kd6 36.h4 Kd5 37.Rf4 Nd4 38.Rf2 Kc5 39.Ra5 Kb6 40.Ra2 Rc8 41.Ra4 Kb5 42.Ra2 Rc6 43.g4 fg4 44.Rf7 Rf6 45.Rf6 gf6 46.Kg2 f5 47.h5 f4 48.Kh2 Ne2 49.Nc3 bc3 50.h6 (50.Ra1 f3 51.Rb1 Ka6 52.Ra1 Kb7–+) 0–1. Crafty 19.01 – Fritz 8, 2005.

7.f4 Bh4 8.g3= Be7 9.Bg2 f6 10.Nc4 a6 11.ba6 b5 12.Na5+= Bf5 13.a4 b4 14.Nb3+= c5 15.e3 de3 16.0-0 Nh6+= 17.de3 Qd1 18.Rd1 c4 19.Nd4 c3 20.Bc1 Bg6 21.f5 Nf5 22.Be4 Nd4 23.Ba8 Ndc6 24.e4 Be4+/– 25.a7 Bc5 26.Kf1 Ba7 27.Re1 f5 28.Bf4 Kf7 29.Bb8 Rb8 30.Re4 Ra8 31.Rc4 Rc8 32.a5 Ke6 33.Ra4 Kd7 34.a6 Rb8 35.h3 g5 36.h4 h6 37.h5 Kd6=+ 38.Nc3 bc3 39.Rc3 Rb1 40.Ke2 Rh1 41.Rd3 Kc5 42.c4 Nd4 43.Ke3 Re1 44.Kd2 Re2 45.Kd1 Rh2 46.Re3 f4 47.gf4= gf4 48.Re5 Kd6 49.Re4 Rh1 50.Kd2 Nb3 51.Kc2 Nc5 52.Rd4 Kc6 53.Ra3 Rh2 54.Kd1=+ Rh5 55.Rf4= Nd7 56.Rd3 Bc5 57.Rf7 Rh1 58.Kc2 Rh2 59.Kc3 Ne5= 60.a7 Ra2–/+ 61.Rh7? Ra3–+ 62.Kc2 Nd3 63.a8Q Ra8 64.Rh6 Kc7 65.Kd3 Re8 66.Rh7 Kb6 67.Rg7 Re6 68.Rh7 Kc6 69.Rh8 Re3 70.Kd2 Re7 71.Rg8 Re6 72.Rh8 Rg6 73.Kd3 Kd6 74.Re8 Rg3 75.Ke2 Rg1 76.Rh8 Kc6 77.Re8 Ra1 78.Rh8 Rb1 79.Rg8 Rh1 80.Re8 Rh2 81.Kf3 Rf2 82.Kg4 Kd7 83.Rh8 Rf1 84.Rb8 Kd6 85.Rh8 Kc7 86.Re8 Rf2 87.Rh8 Re2 88.Rh7 Kb6 89.Rh8 Re1 90.Rd8 Kc7 91.Rh8 Kd7 92.Rh7 Kc6 93.Rh8 Rb1 94.Rh7 Rg1 95.Kh5 Bd4 96.Rh6 Kc5 97.Rg6 Rh1 98.Kg5 Bc3 99.Re6 Rg1 100.Kh6 Rg8 101.Re7 Bd4 102.Rh7 Be3 103.Kh5 Rg5 104.Kh6 Rg1 105.Kh5 Bf4 106.Rf7 Be5 107.Rf8 Rg7 108.Re8 Bc7 109.Rh8 Rg1 110.Rf8 Re1 111.Rf5 Kc4 112.Rf8 Rh1 113.Kg6 Rg1 114.Kh7 Kd4 115.Rh8 Rh1 116.Kg8 Rf1 117.Rh7 Be5 118.Rf7 Rg1 119.Kf8 Kd5 120.Rh7 Ke6 121.Re7 Kd6 122.Re8 Rg2 123.Rc8 Ke6 124.Re8 Kf6 125.Re5 0–1. Crafty 19.01 – Fritz 8, 2005.

7.f4 Nh6 8.c3 Be5 9.fe5 Nf5 10.g3 Qd5 11.cd4 e3 12.Rg1 Qc4 13.a4 Nd4–/+ 14.Na3 Qb4 15.Bc3 Qc5 16.Rh1 0-0=+ 17.Bg2 Rd8 18.e6 Ne6 19.Rf1 a6 20.Be4 ab5–+ 21.Nb5 Qh5 22.d3 Qh2 23.Be5 Nd7 24.Qc1 Ne5 25.Qe3 0–1. Crafty 19.01 – Fritz 5.32, 2005.

7.d4 Be7 8.f3 –/+.

8.Nd3 a6 9.ba6=+ Na6 10.fe3 Bg5 11.Bc1 Bh4 12.g3= Be4 13.Rg1 Be7 14.Nc3 Nf6 15.Bh3 0-0 16.Rf1 c5 17.Ne5 Bd6 18.Ne4 Ne4= 19.Nf3 Qa5 20.Bd2 Qc7 21.Rg1 b5 22.Bf5 Rfe8 23.Rg2 g6 24.Bg4 f5 25.Bh3 Qg7 26.Rg1 Nc7 27.g4? Qh6–+ 28.Bf1 Bh2 29.Rg2 Bg3 30.Rg3 Ng3 31.gf5 0–1. Crafty 19.01 – Fritz 6, 2005.

8.Nd3 a6 9.ba6=+ Na6 10.fe3 Bg5 11.Nf4 Be4 12.Kf2 Nf6 13.Qd2 Bh4 14.Kg1 Ng4 15.g3 Bh1 16.Kh1 Bg5 17.Nc3 c6 18.h3 Nf6 19.Kg1 0-0–+ 20.a4 Re8 21.Qd3 Qe7 22.Bc1 Nb4 23.Qd2 b5 24.a5 Na6 25.Qd3 b4 26.Na4 Ne4 27.h4 Bf6 28.Nb6 Ra7 29.Bh3 Qc7 30.Nh5 Be5 31.Nc8 Nac5! 32.Qd1 Rc8 33.Bc8 Qc8 34.de5 Qg4 35.Nf4 Ng3 36.Bd2 Nce4 37.Kh2 Qh4 38.Kg2 Nf5 39.Be1 Qg5 40.Kh1 Ne3 41.Qd4 0–1. Crafty 19.01 – Fritz 6, 2005.

8.Nd3 c6 9.a4 –/+.

8.Nd3 c6 9.fe3 cb5 10.Nc3 Bg5 11.Nf4 Nf6 12.g3 Na6 13.Bg2 Nc7 14.Qd2 0-0=+ 15.0-0 Re8 16.Rad1 a5 17.h4 Bh6 18.Rb1 b4–+ 19.ab4 ab4 20.Nd1 b3 21.Nd3 Ng4 22.Kh1 Qd6 23.Rf3 bc2 24.Qc2 Be4 25.Qc5 Qd7 26.Bc1 b5 27.Nc3 Rac8 28.Rf1 Ne3 29.Ne4 Nf1 30.Ne5 Re5 31.de5 de4 32.Bf1 Ne6 33.Qb5 Qb5 34.Rb5 Rc1 35.Rb8 Nf8 36.Kg2 Bd2 37.Rd8 Bc3 38.Rd5 0–1. Crafty 19.01 – Fritz 5.32, 2005.

8.Nd3 c6 9.fe3 cb5 10.Nc3 Bg5 11.Nf4 Nf6 12.g3 Na6 13.Bg2 Nc7 14.Qd2 0-0 15.0-0 Re8 16.Rad1 Ne4 17.Qc1 Qd7 18.Na2 Re7 19.Bc3 Bg4 20.Bb4 Ree8 21.Be4 Re4 22.Nc3 Ree8 23.e4 b6 24.e5 Ne6 25.Rd2 a5 26.Bd6 Bf4 27.gf4 Qc6 28.Qb2 b4 29.ab4 Rec8 30.f5 Qc3–/+ 31.Qc3 Rc3 32.fe6 fe6 33.ba5 ba5 34.Ra1 a4 35.Bb4 Rc4 36.c3 Bh5 37.Rda2 Be8 38.Ra3 g5 39.Rf1 Bb5 40.Bc5 Kg7 41.Kg2 Rb8 42.Be7 g4 43.Kg3 h5 44.Bd6 Rbc8 45.Bc5 Be8 46.e3 Bg6 47.Rf6 Bf7 48.Bb4 Ra8 49.Kf4 Rc6 50.e4 Rca6 51.ed5 ed5 52.Bd6 Bg6 53.Kg5 Be8 54.Bf8 Kh7 55.e6 Rb6 56.Bb4 Kg7 57.Bf8 Kh7 58.Bb4 Rc6 59.Kf5 Rb6 60.Ke5 Rb5 61.Rf2 Bc6 62.Kd6 Rb6+/– 63.Rf7 Kg6 64.Rc7 Bb7 65.Kc5 Raa6 66.e7 Rc6 67.Rc6 Bc6 68.c4 dc4 69.d5 Bd7 70.d6 Kf7 71.Kc4 Ke8 72.Bc5 Be6 73.Kd4 Kd7 74.Ke5 Bb3 75.Ra1 Ra5 76.Kd4 h4 77.e8Q Ke8 78.Re1 Kd8 79.Bb6 Kd7 80.Ba5 Kd6 81.Re4 Bd1 82.Ke3 Kc6 83.Rd4 Bb3 84.Rg4 h3 85.Bb4 Be6 86.Rd4 Kb5 87.Ba3 Ka5 88.Kf4 Kb5 89.Rb4 Kc6 90.Ra4 Bd5 91.Ke5 Bg2 1–0. Crafty 19.01 – Fritz 5.32, 2005.

8.Nd3 Bg5 9.Nc3 Nf6 10.f4 Bh6 11.g3 0-0 12.Bg2 c6 13.0-0 Re8 14.Qc1 cb5 15.Nb4 Nc6 16.Ncd5 Ng4 17.Nc6 bc6 18.Nb4 Rc8 19.Nc6 Qb6 20.d5+/– a6 21.Bd4 Qc7 22.c4 Qd7 23.cb5 ab5 24.Qc5 f6 25.Qb5 Rc7 26.d6 Rb7 27.Qc4 Be6 28.Qc5 Kf7 29.Na7 Kg8 30.Bc6 Qf7 31.Bb7 Qb7 32.Nc6 Kh8 33.Rfb1 Qa8 34.Rb6 Bd7 35.Qd5 Be6 36.Qf3 Bd7 37.Nb8! Qa7 38.Rb4 Qb8 39.Rb8 Rb8 1–0. Crafty 19.01 – Comet B25, 2005.

8.fe3 c6 9.c4 =+.

8.fe3 Be4 =+.

9.de5 Qh4 10.Kd2 a6 11.a4 Be6 12.Qe1 Qg5 13.Ra3 Nd7 14.Qg3 (14.h4!? Qg4 15.Bd4–/+) 14...Qg3–+ 15.hg3 Nb6 16.Kc1 Nc4 17.Rb3 ab5 18.ab5 Ne7 19.Na3 Nb2 20.Kb2 Nf5 21.e4 de4 22.Rc3 Kd7 23.g4 Nh6 24.g5 Ng4 25.Rh4 Ra4 (25...Ne5?! 26.Re4 Ng4 27.Rd4 Ke8 28.e4=+) 26.Rch3 (26.e3 Ne5 27.Be2 c6–+) 26...Rha8 27.b6 (27.c4–+) 27...Ne5 28.Rc3 Ra3! (28...cb6?! 29.e3 Rb4 30.Kc1–+) 29.Rc7 Kd6 30.Re4 Ra2 31.Kc3 Rc2! 32.Kc2 Bf5 33.e3 Be4 34.Kc3 Ra3 35.Kd2 Rb3 36.Rc8 Rb2 37.Ke1 (37.Kd1 Ng4 38.Re8 Ne3 39.Ke1 Kd5–+) 0–1. Doctor? 3.0 – Fritz 8, 2004.

9.de5= Qh4 10.g3 Qe4 11.Rg1 Qe3 12.Qd5 Qg1 (better is 12...Ne7!? 13.Qd4 Qd4 14.Bd4 Bc2=) 13.Qb7+/– Be4 14.Qe4 c6 15.e6 (15.Qg4 Ne7 (15...cb5?? 16.Bd4 Qd4 17.Qd4+-) 16.Qg7 Rg8 17.Qh7 cb5+-) 15...Nf6 (15...Qh2 16.Qg4 Nh6 17.ef7 Kd8 18.Qg7 Nf7 19.Qf6 (19.Qf7?! Qg3 20.Qf2 Qf2 21.Kf2 Rf8 22.Ke1 a6+-) 19...Ke8 20.Qe6 Kf8 21.Qc8 Ke7 22.Qc7 Ke6 23.Bh8 Nh8 24.Nd2+-) 16.ef7 Kf7 17.Qc4 Kg6 18.Qd3 Kf7 19.bc6 Qh2 20.Bf6 gf6 21.c7 Na6 22.Qd7 Kg6 23.Qg4 Kh6 24.Nc3 Nc7 25.Qf4 Kg6 26.Qg4 Kh6+= 27.Qf4 Kg6+/– 28.Qg4 Kh6= ½–½. Crafty 19.01 – Fritz 5.32, 2005.

9.de5= Qh4 10.g3 Qe4 11.Rg1 Qe3 12.Qd5 Qg1 (better is 12...Ne7!? 13.Qd4 Qd4 14.Bd4 Bc2=) 13.Qb7+/– Be4 14.Qe4 c6 15.e6 (15.Qg4 Ne7 (15...cb5?? 16.Bd4 Qd4 17.Qd4+-) 16.Qg7 Rg8 17.Qh7 cb5+-) 15...Nf6 (15...Qh2 16.Qg4 Nh6 17.ef7 Kd8 18.Qg7 Nf7 19.Qf6 (19.Qf7?! Qg3 20.Qf2 Qf2 21.Kf2 Rf8 22.Ke1 a6+-) 19...Ke8 20.Qe6 Kf8 21.Qc8 Ke7 22.Qc7 Ke6 23.Bh8 Nh8 24.Nd2+-) 16.ef7 Kf7 17.Qc4 Kg6 18.Qd3 Kf7 19.bc6 Qh2 20.Bf6 gf6 21.c7 Na6 22.Qd7 Kg6 23.Qg4 Kh6 24.Qf4 Kg7 25.Nc3 Qh6 26.Qd6 Qe3 27.Nd5 Qe5 28.Qe5 fe5 29.Bh3 Rhe8 30.0-0-0 Nc5 31.Ne3 Kf8 32.Nc4 Na6 33.c8Q Rac8 34.Bc8 Rc8 35.Ne5 Nc5 36.Rh1 Rc7 37.g4 Ne4 38.Rf1 Ke8 39.Rh1?? Kf8 40.Rf1?? Ke8 41.Nf3 Re7 42.Re1 a5 43.e3 a4 44.Kb2 Rb7 45.Kc1 Re7 46.Nh2 Nd6 47.Rd1 Nc4 48.Rd4 Na3 49.Ra4 Re3 50.c4 Rb3 51.Kd2 Rb2 52.Kc3 Nc4 53.Nf3 Rf2 54.Ng5 h6 55.Rc4 hg5 56.Rc5 Rf3 57.Kd2 Kf7 58.Rg5 Kf6 59.Rg8 Kf7 60.Ke2 Kg8 61.Kf3 Kh8 62.Kf4 Kg8 63.Kf5 Kf7 64.g5 Kg7 65.Ke6 Kg6 66.Ke7 Kg5 ½–½. Crafty 19.01 – Fritz 5.32, 2005.

9.de5 Qh4 10.g3 Qe4 11.Rg1 Ne7 (11...Qe3?! 12.Qd5 Qg1 13.Qb7=) 12.Qd3 (12.Bg2 Qc2 13.Qc2 Bc2=+) 12...Qa4 13.Qb3 Bc2 (13...Qb3 14.cb3 Bc2 15.Nd2=+) 14.Qa4 Ba4 15.Nc3 Bb3 16.e4 d4 (16...c6 17.ed5 cd5 18.e4+=) 17.Nd1 (17.Nd5 Nd5 18.ed5 Bd5 19.Bd4 c6=) 17...c5 (17...Nd7 18.e6 Be6 19.Bd4=+) 18.e3= de3 (18...Bd1 19.Rd1 de3 20.Ke2=) 19.Ne3+= 0-0 (19...a6 20.e6 f6 21.Rc1=) 20.Be2 (20.Rc1 Nd7=) 20...Rd8 (20...Nd7 21.Rc1=) 21.Nf5 Nf5 22.ef5 Nd7 23.Rc1 (23.g4 Re8 24.Rg3 c4+=) 23...Re8= 24.Rc3 Bd5 25.Re3 Nb6 26.Kf2+= Nc4 27.Bc4+/– Bc4 28.Rc3 Bb5 29.Rc5 Bd3 30.g4+/– Rac8 31.Rc8 Rc8 32.Rd1 Bb5 33.Ke3 Kf8 34.Rd5 Be8 35.Ra5 Rc2 36.Bd4+/– a6 37.Rd5 Bc6 38.Rd8 Ke7 39.Rg8 g6 40.e6 gf5+= 41.gf5 Rh2 42.Bc5 Kf6= 43.e7 Rh3 44.Kd2 Rh2 45.Kd3 Rh3 46.Ke2 Rh2 47.Ke3= Rh3 48.Ke2 Rh2 49.Ke3= ½–½. Comet B50 – EXchess 3.11, 2005. 9.de5 Qh4 10.g3 Qe4 11.Rg1 Ne7 12.Qd3 Qa4 13.Qb3 Bc2 14.Qa4 Ba4 15.Nc3 Bc2 16.e4 Be4 (< 16...de4 17.Rc1 Bb3 18.Ne4+=) 17.Ne4 de4 18.Bg2 a6 19.Be4 ab5 20.Bb7 Ra4 21.e6 (21.Bf3 c5=) 21...f6 22.e3 c6 23.Bd4 Rc4 (23...Nf5 24.Bc5 Rc4 25.g4 Rc5 26.gf5=+) 24.Rd1 (24.Ba7 0-0=) 24...0-0 (24...Nf5 25.Rf1 Nd6 26.Be5 Nb7 27.Bb8–/+) 25.g4 Re8 26.g5 f5 27.Rf1 b4 28.a4 b3 29.a5 c5 30.Bb2 Ra4 31.e4 g6 32.ef5 gf5 33.Ra1 Ra1 34.Ba1 Nbc6 35.a6 Nd8 36.Bf6 Kf8 37.Kd2 c4 38.Kc3 Ne6? 39.a7 Kf7 40.Be7 Ke7 41.Kc4 b2 42.Kc3 Nc7 43.Kb2 Rf8 44.Rc1 Na8 45.Rc8 Rc8 46.Bc8 f4 47.Bb7 Nc7 48.Kb3 Kf7 49.Be4 Ke6 50.Kc4 Ke5 1–0. Comet B50 – Crafty 19.01, 2005.

4.Be5 0-0 5.Nf3 d5 6.e3 Bg4 7.Be2 Nbd7 8.Bb2 c6 9.0-0 Qc7 10.c4 Rad8 (10...dc4 11.Bc4 Nb6 12.Be2+=) 11.Nc3 (11.cd5 Nd5 12.Nc3+/-) 11...Bd6? (11...dc4 12.Bc4 Ne5 13.Be2 Nf3 14.gf3=) 12.h3 (12.cd5 cd5 13.Rc1 Qb8+/-) 12...Bh5? (12...Bf3 13.gf3 dc4 14.f4=) 13.Rc1?? (13.cd5 Nd5 14.Nd5 cd5 15.Rc1+-) 13...Ne4?? (better 13...Bf3 14.gf3 dc4 15.Bc4 Ne5+=) 14.cd5+- Be5 (14...Nc3 15.Bc3 (15.dc3?! cd5 16.c4 Bf3 17.gf3 dc4+/-) 15...Rfe8 16.dc6 bc6 17.Bd4+-) 15.dc6 (15.Ne4?! Bb2 16.Rc2 Bg6+-) 15...bc6 16.Ne5 (16.Ne4?! Bb2 17.Rc2 Bg6+-) 16...Be2 17.Qe2 Ne5 (17...Nc3 18.Bc3 Ne5+-) 18.Ne4 f5 (18...f5 19.d4 Nf7+-). GM_HUSARZ (1965) - satoshi (2000), Rated Bullet game, lichess.org, 2015.

4.Nf3 0-0 (4...e4!? 5.Nd4 0-0=+) 5.Ne5= d5 6.e3 Bf5 (6...Bd6 7.Be2=) 7.Be2 Nbd7 8.0-0 c6 9.c4 (9.Nf3 a5 10.Nd4 Bg6+=) 9...Qc7 (9...a5!?=) 10.Nd7+= Qd7 11.Nc3 Ne4 (11...dc4 12.Bc4 b5 13.Be2=) 12.Rc1 Rad8 (12...a5 13.b5+=) 13.d3 Nf6 14.cd5 cd5 15.d4 Bd6 16.Bd3 Bb8 17.Bf5 Qf5 18.Ne2 Qh5 19.Ng3 Qg6 20.Qc2 h5 21.Qg6 fg6 22.Rc5 (22.Ne2 g5+/-) 22...Ne4 (22...Ng4!?=) 23.Rc2 (23.Ne4 de4 24.f4 ef3 25.Rf3 Rde8+/-) 23...Nf6 24.Rfc1 h4 25.Ne2 Ne4 26.Nf4 (better 26.Nc3+/-) 26...g5?? (better 26...Bf4 27.ef4 Rf4+=) 27.Ne2?? (better 27.Ne6 Nd6 28.e4+-) 27...Nf2-/+ 28.Nc3 (28.h3!? g4 29.Nf4 Bf4 30.ef4-/+) 28…Ng4-+ 0-1. GM_HUSARZ (1950) - satoshi (2020), Rated Bullet game, lichess.org, 2015.

4.Bb2 d6 5.Nf3 0-0 6.Bc4 Ne4–/+ 7.Ne5? de5–+ 8.Be5 Bf6 9.Bf6 Qf6 10.c3 Bf5 11.d4 Re8 12.0-0 Nd6 13.Kh1 Nc4 14.Nd2 Nd2 15.Qd2 Nc6 16.d5 Ne5 17.Rae1 Nc4 18.Qa2 Nb6 19.d6 cd6 20.Rd1 Be6 21.c4 Bc4 22.Qd2 Bf1 23.Rf1 d5 24.Rc1 Red8 25.Rc7 Nc4 26.Qe2 Re8 27.Qh5 Re1 0–1. Duffer – SEVENQUEENS, chess.net, 1998.

4.Bb2 Ne4 5.Be5 0-0 6.Bd3 =+.

4.Nc3 d5 5.ed5 Nd5=.

4.d3 0-0 5.c4 Nc6 6.Nc3 d5 7.ed5 Bg4 8.Nf3 Nd4 9.h3 Nf3 10.gf3 Bf5 11.Bg2 Bd6 12.Bg5 Qe7 13.Ne4 Rad8 14.Bf6 gf6 15.Rg1 Rfe8 16.Qd2 c6 17.Bh1 Kf8?? 18.Qh6# 1–0. PeterHalvarsson – babylyub, ICS rated light match, 1998.

4.d3 Nc6 5.Nf3 d5 6.ed5 Nd5 7.c4 Nf6 8.b5 Nd4 9.Ne5 0-0 10.Be3 Re8 11.Nc3 Bc5 12.Nf3 Nf5 13.d4 Ne3 14.fe3 Re3 15.Be2 Rc3 16.dc5 Be6 17.0-0 Bc4 18.Bc4 Rc4 19.Rc1 Qd1 20.Rfd1 Ra4 21.Rd3 Re8 22.c6 b6 23.Rcd1 a6 24.Nd4 Ne4 25.ba6 Nd6 26.h3 Ra6 27.g3 Rea8?? 28.Nb5+- Rc8 29.Nd6 cd6 30.Rd6 Rf8?? 31.c7 Raa8 32.R1d3 b5?? 33.Rd8 h6 34.Ra8 Ra8 35.Rd8 Rd8 36.cd8Q Kh7 1–0. Fritz 5.32 – Comet B25, 2004.

4.d4 Ne4 5.de5 d5 6.Nd2 0-0 7.Bd3 Nd2=.

4.Nf3 Ne4 5.d3 Ng5 6.Ne5 d6 7.Ng4 0-0 =+.

6.c4 Nb6=+ 7.Nf3 Bf6 8.Ra2 0-0 9.Be2 a5 10.ba5 Ra5 11.Bd2 Ra6 12.0-0 Be6 13.Nc3 Nc6 14.Ne4 Be7 15.a4 Qa8 16.Nc3 f6 17.Ra1 Rd8 18.Nb5 Rd7 19.Nc3 Nb4 20.Ne1 Ra5 21.f4=+ ef4 22.Rf4 Bd6 23.Rf3 Be5 24.Nc2 c5 25.Rb1 Nc2 26.Rb6 Nd4 27.Re3 Qd8 28.Rb1 Bf4 29.Re4 Bd2 30.Qd2 f5 31.Re5 Bc4! 32.Qe3 Bf7–+ 33.Rf1 c4! 34.Nb5 Ne2 35.Qe2 cd3 36.Qd2 Ra4 37.Ref5 Ra2 38.Qf4 Qf8 39.Nd6 Qd6 40.Qd6 Rd6 41.Rf7 h6 42.Rb7 Rc6 43.h4 Rcc2 44.Kh2 Rg2 45.Kh3 d2 46.Rd1 Re2 47.Rd7 Ra3 48.Kg4 g6 49.Kf4 Rf2 50.Ke4 Rh3 51.R1d2 Rh4 52.Ke3 Rd2 53.Rd2 Kf7 54.Rd7 Ke6 55.Rb7 g5 56.Rb6 Kf5 57.Rb5 Kg4 58.Ke4 Rh1 59.Ke5 Kg3 60.Rb3 Kh4 61.Rb6 h5 62.Kf6 g4 63.Rb4 Kh3 64.Kg5 g3 65.Rh4 Kg2 66.Rf4 Kh2 67.Ra4 0–1. Crafty 19.01 – Fritz 6, 2005.

6.c4 Nb6=+ 7.Nf3 Bf6 8.Ra2 0-0 9.Be2 Bf5 10.0-0 a5 11.ba5 Ra5 12.Bd2 Ra6 13.Qc2 Qd7 14.c5 Na4–/+ 15.Ng5 Nc6 16.Be3 Bg5–+ 17.Bg5 Be6 18.Ra1 Nd4 19.Qd1 Nc5 20.Nc3 Rfa8 21.Bh5 Ra3 22.Ra3 Ra3 23.Qc1 Ra6 24.Qe3 f6 25.Bh4 Ra3 26.Qc1 Rb3 27.Qa1 Nd3 28.Qa8 Qc8 29.Qc8 Bc8 30.Nd5 Kf8 31.Nc7 Nf4 32.Bd1 Rc3 33.Na8 Ng2! 34.Bg3 Bh3 35.Bg4 Bg4 36.Kg2 Bf3 37.Kh3 g5 38.Rg1 0–1. Crafty 19.01 – Fritz 6, 2005.

6.Nf3 0-0 7.c4 Nf4 8.Nc3 Re8 9.g3 Ne6 10.Bg2 a5 11.ba5 Nc5 12.0-0 Nd3 13.Nd5 e4 14.Nd2 f5 15.Qh5 Nc6 16.Ne7 Qe7 17.a4 Be6 18.Ba3 Qf6 19.a6 Bf7 20.Qd1 Ra6 21.Rb1 Rea8 22.Rb7 Ra4 23.Bc1 Ra2 24.Rc7 Nd4 25.Kh1 Qd8 26.Rf7 Kf7 27.Ne4 fe4 28.Be4 Nf2 29.Rf2 Rf2 30.Bd5?? Qd5! 31.cd5 Nf3 32.Qf3 Rf3 33.Kg2 0–1. Comet B50 – Fritz 6, 2005.

6.Nf3 0-0 7.c4 Nf4 8.d4= Bf5 9.Ne5+= Ng6 10.Nc3 a5 11.b5 Re8 12.Be2 Ne5 13.de5 Nd7 14.Bf4 g5 15.Bg3+= Bc5 16.Qd5 Ne5= 17.Be5 Qd5 18.Nd5 Re5 19.Nc7 Rd8 20.Nd5? Bd3–+ 21.Nf6 Kh8 22.Ra2 Bc4 23.Rb2? Bd4 24.f4 gf4 25.Ng4 Bb2 26.Ne5 Bc3 27.Kf2 Bd4 28.Ke1 Bc3?? 29.Kf2–/+ Bd4 30.Ke1–+ Bd5 31.Nf3 Be3 32.Rf1 Rg8 33.g3 fg3 34.hg3 Rg3 35.Ne5 Bc5 36.Nf7 Kg7 37.Rf5 Rg1 38.Bf1 Ba3 39.Rd5 Kf7 40.Rd7 Kg6 41.Rb7 Bb4 42.Ke2 a4 (43.Rc7 a3–/+) 0–1. Doctor? 3.0 – Crafty 19.01, 2004.

6.Nf3 0-0 7.c4 Nf6!? =+.

6.Nf3 Nc6 7.c4 Nf6 8.b5 Nd4 9.Ne5 0-0 10.Be2 Re8 11.Be3 Bf5 12.g4 Be6 13.g5 Ne2 14.Qe2 Nd7 15.d4 Bg5 16.Nd2 Bf5 17.Qf3 Bg6 18.Ng6+= Be3 19.fe3 hg6 20.Rb1 Qh4 21.Kd1 Qh5 22.Qh5 gh5 23.e4 Rad8 24.Kc2 Nf8 25.Kc3 Ne6 26.Nf3 Nf4 27.Rhe1 Re6 28.Ne5 f6 29.Nd3 g5 30.Nf4+/– gf4 31.Kd3 Kf7 32.c5 f3 33.Rf1 Rde8 34.Rbe1 a6 35.a4 ab5 36.ab5 f2? 37.Rf2+- c6 38.Rf5 h4 39.Rh5 cb5 40.Rh7 Kg6 41.Rb7 Ra6 42.Rb5 Ra2 43.Rg1 Kf7 44.Rb7 Ke6 45.Rgb1 Rh2 46.R1b6 1–0. Fritz 8 – Comet B25, 2004.

6.Nf3 Nc6 7.c4 Nf6 8.b5 Nd4=+ 9.Ne5 0-0 10.Be3 Re8 11.Nc3 Bc5 12.Nf3 Nf5 13.d4 Ne3 14.fe3 Re3 15.Be2 Bd6 16.Qc2 Qe7 17.Ra2 Ba3 18.0-0 Bb4 19.Nd1 Bf5 20.Qf5 Re2 21.Re2 Qe2 22.Ne5 Rd8 23.Qf4 Bd2 24.Qf2 Qf2 25.Rf2 Bb4 26.Rf4 Bd6 27.Nf2 Kf8 28.Nfd3 Ke7 29.h4 h6 30.d5 Be5 31.Ne5=+ Rf8 32.Rf3 Kd6 33.Rf5 Nd7 34.Nd7 Kd7 35.Kf2 Kd6 36.Rf4 f5 37.Ke3 g5–/+ 38.Rf2 Kc5 39.hg5 hg5 40.Kd3 f4 41.Ra2 f3 42.gf3 Rf3 43.Ke2 Rc3 44.Ra7 Rc4 45.Rb7 Kd5 46.Kf3 Kd6 47.b6 g4 48.Kg3 cb6 49.Rb6= Ke5 50.Rb8 Kf5 51.Rf8 Ke6 52.Rg8 Rc3 53.Kg4 Rc4 54.Kh5. Crafty 19.01 – Doctor? 3.0, 2005.

6.Nf3 Nc6 7.c4 Nf6 8.b5 Nd4 9.Ne5 0-0 10.Be3 Re8 11.Nc3 Bc5 12.Nf3 Nf5 13.d4 Ne3 14.fe3 Re3 15.Be2 Bd6 16.Qc2 Qe7 17.c5 Bf4 18.c6 bc6–+ 19.Nd1 Bf5 20.Qb2 Re6 21.bc6 Re8 22.Nc3 Nd5!! 23.0-0 Nc3 24.Bb5 Re3 25.a4 Bg4 26.Kh1 Qe4 27.Ne5 Be2 28.Qb3 Re5 29.de5 Nb5 30.Rad1 Bd1 31.Qb5 (31.Qd1 Nd4–+) 0–1. Doctor? 3.0 – Fritz 8, 2005.

6.Nf3 Nc6 7.c4 Nf6 8.b5 Nd4 9.Ne5 0-0 10.Be3 Re8 11.Nc3 Bc5 12.Nf3 Nf5 13.d4 Ne3 14.fe3 Re3 15.Be2 Bd6 16.Qc2 Qe7 17.Qd2 Bf5 18.Ne5=+ Ng4 19.0-0 Be5 20.de5 Qe5 21.Bg4 Bg4 22.Nd5 Re2 23.Qf4 Qf4 24.Rf4 h5 25.h3 Bd7 26.Rd1 Rc8 27.Nc3 Re7 28.Nd5 Re2 29.Nc3 Re7 30.Nd5 Re6 31.Rfd4 Be8 32.Kf2 c6 33.Nf4 Re5 34.a4 cb5 35.ab5 a6 36.ba6 ba6 37.Nd3 Re7 38.Nf4 Rc5 39.Nd5 Re5 40.g4 a5 41.gh5 Rh5–/+ 42.Nf4 Rhf5 43.Ke3 a4 44.Nd3 Rc8 45.Kd2 Rf3 46.h4 Rh3 47.Kc3 Rb8 48.Rd2 Bc6 49.Kc2 a3 50.Kc3 Ra8 51.Kb3 Re3 52.Rd6 a2 53.Ra2= Rb8 54.Kc3 Be4 55.Kd2 Rh3 56.Ra7 Rh4 57.Rdd7 Bg6 58.c5 Rh2 59.Kc3 Rh3 60.c6 Bf5 61.Rab7?? Rc8–+ 62.Rd6 Rd3 63.Rd3 Bd3 64.Kd3 Rc6 65.Ke3 Rc4 66.Kd3 Rc5 67.Kd4 Ra5 68.Ke4 Rh5 69.Rd7 Kf8 70.Kf3 Re5 71.Kf2 Re7 72.Rd8 Re8 73.Rd7 Re4 74.Kf3 Re7 75.Rd8 Re8 76.Rd7 Re1 77.Kf2 Rh1 78.Kg2 Rh4 79.Kf3 Rh5 80.Ke4 Rc5 81.Kf3 Rc4 82.Ke3 Rh4?? 83.Kf3 Rh1?? 84.Kg2 Re1?? 85.Kf2 Re5 86.Kf3 Rc5 87.Ke3 Rc4 88.Kf3 Rh4 89.Ke3 Rb4 90.Kf3 Rb5 91.Ke3 Rc5?? 92.Kf3 Rc1 93.Kf2 Rc3 94.Rb7 Rd3 95.Ke2 Rd4 96.Ke3 Rd5 97.Ke4 Rc5 98.Kf3 Re5?? 99.Rd7 Re8?? 100.Kf2 0–1. Fritz 5.32 – Comet B50, 2004.

6.Nf3 Bg4=.

3.Bb2 Bd6 4.c4 b6 5.d4 Qf6 (5...e4 6.e3=) 6.Qd2 (6.c5 bc5 7.dc5 Bf8+=) 6...Bb7 7.c5 bc5 8.bc5 Be7 9.de5 Qg6 10.Nf3 Bc5 11.g3? (11.Nc3 Ne7=) 11...Nc6 (better is 11...Qb6–+) 12.Bg2= Nge7 13.0-0 0-0 (13...Rd8 14.Nc3=) 14.e3 (14.Qd7 Rad8 15.Qc7–/+) 14...d6 15.ed6 Bd6 (15...Qd6? 16.Qc3 Rf7 17.Rc1+-) 16.Nc3 Qg4 17.Nd5 Nd5 (17...Rab8 18.h3 Qg6 19.Rfd1=) 18.Qd5 Kh8 19.Qd1 Rad8 20.Qe2 Ne5 21.Nd4 Bg2+= 22.Qg4 Ng4 23.Kg2= Bc5? 24.Ne6+- Rd2 25.Bg7 Kg8 26.Bf8 Bf8 27.Nf8 Ne3+/– 28.Kg1 Nf1 29.Kf1 Kf8+= 30.Rc1 Rd7 31.Rc5 Rf7 32.Ra5 Ke8 33.Ra7+- Rd7 34.a4 Kd8 35.a5 Rd1 36.Kg2 Ra1 37.Ra8 Kd7 38.a6 Kc6 39.a7 Kb7 40.Rh8 Ka7 41.Rh7 Kb6 42.Rf7 Ra5 43.h4 Re5 44.h5 c5 45.h6 c4 46.Rf8 Kb7?? 47.Rd8 c3?? 48.Rd1 Re6 49.h7 Rh6 50.Rc1 Rh7 51.Rc3 1–0. Fournier,Frederic (1710) – Petrov Genadij Konstantinovic, Active, 2012.

3.Bb2 Nf6 4.e3 e4 5.c4 Be7 6.d3 0-0 7.Nc3 c6 8.Nge2 d5 9.cd5 cd5 10.de4 fe4 (10...de4!? 11.Nf4 Kh8+=) 11.Nf4+/- Bg4 12.Qb3 Kh8 13.h3 Bh5 (better 13...Bd7!?+/-) 14.Nh5+- Nh5 15.Qd5 (15.Nd5 Bh4 16.Nf4 Nf4 17.ef4 Rf4+/-) 15...Qd5 16.Nd5 Bh4 17.g3 Bd8 (17...Ng3 18.fg3 Bg3 19.Kd1+-) 18.Bg2 Nc6 (18...Re8 19.g4 Nf6 20.Bf6 Bf6 21.Rd1+-) 19.Rc1 (19.b5 Na5 20.Be4 Nf6 21.Bf6 Bf6 22.Nf6 Rf6+-) 19...a5 (19...Re8 20.Rc4+-) 20.b5 Ne7 (20...Na7 21.a4+-) 21.Ne7 Be7 22.Be4 Rab8 (22...Rfb8 23.Rc7 Bf6 24.Bc1+-) 23.Rc7 Bd6 (23...Bf6 24.Bf6 Nf6 25.Bb7+-) 24.Rb7 Rb7 25.Bb7 Nf6 (25...Rb8 26.Bc6+-) 26.Bc6 Rd8 (26...Bc5 27.Ke2+-) 27.Ke2 Bc5 28.Rc1 Bb6 29.Bf3 Nd7 (29...Rb8 30.Rc6 Bd8 31.Be5 Rb5 32.Bf6 gf6 33.Rc8 Rb2 34.Ke1+-) 30.Rc6 Ba7 (30...Bc5 31.Be4+-) 31.Bg4 Nc5 (31...h5 32.Bf5 Nf8 33.Rc7+-) 32.Rc7 Bb8 (32...Bb6 33.Rg7 Nd3 34.Bf6 Nc1 35.Kf1+-) 33.Rg7 (33.Rg7 Rd5 34.Rg5 Be5 35.Be5 Re5 36.Re5+-) 1-0. Adlai – Byadab, internet, 2021.

3.d4 d6 4.de5 de5 5.Qd8 Kd8 6.Bg5 Be7 7.Be7 Ne7 8.Nc3 c6 9.Nf3 e4 10.Nd4 Bd7 (10...Kc7 11.0-0-0+=) 11.0-0-0 Na6 (11...Kc7 12.e3+-) 12.Ne6+- Kc8 13.Ng7 Kc7 (13...h5 14.e3 Rh7 15.Ba6 ba6 16.Rd7 Kd7 17.Rd1 Nd5 18.Nd5 cd5 (18...Rg7? 19.Nb6 Ke7 20.Na8 Rg2 21.Nc7+-) 19.Rd5 Kc6 20.Rc5 Kb6 21.Nf5 Rc7+-) 14.e3+- Rac8 (14...Rhg8 15.Nh5 Rad8 16.g3+-) 15.Bc4 Kb8?? (better 15...Rcd8+-) 16.Rd7 Nd5 (16...Rc7 17.Rhd1 b5 18.Be6+-) 17.Bd5 cd5 18.Nd5 Rc6 (18...Rcd8 19.Rd8 Rd8 20.Rd1+-) 19.b5 Nc5 20.bc6 Nd7 21.cd7 Rd8 22.Nf6 Kc7 23.Ne6 Kc6 (23...Kd6 24.Nd8 b6 25.Rd1 Ke7 26.Nc6 Kf6 27.d8Q Kg6 28.Ne5 Kh5 29.g3 Kh6 30.Rd7 Kh5 31.Rh7) 24.Nd8 Kc7 (24...Kd6 25.Nb7 Ke6 26.d8Q f4 27.Nc5 Kf5 28.Nfe4 h6 29.Qf6 Kg4 30.Qh6 fe3 31.Qg5) 25.Nf7 Kc6 (25...Kb6 26.d8Q Ka6 27.Nd6 h6 28.Qc7 f4 29.Qb7 Ka5 30.Qa7) 26.d8Q (26.d8Q Kb5 27.Qd5 Ka6 28.Nd6 Kb6 29.Qb7 Ka5 30.Qa7) 1–0. Karl – Tqqnn, internet private, 2018.

3.e3 d5 4.Bb2 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 f5).

3.e4 Ne7 A) 4.Bc4 A1) 4...a5 5.b5 fe4 6.Qh5 Ng6 7.Bd5; A2) 4...c6 5.ef5 Nf5 6.Bb2 d6 7.Qh5; A3) 4...d5 5.ed5 Nd5 6.Nf3 Nf4 7.d4; B) 4.Nc3 B1) 4...a5 5.b5 d5 6.ed5 Nd5 7.Bb2; B2) 4...d5 5.ed5 Nd5 6.Bb2 Nc3 7.Bc3; C) 4.ef5 Nf5 5.Nf3 d6 6.Nc3 Be7 7.Bc4.

3.e4 Nf6 4.ef5 d5 (4...d6 5.g4 h5 6.g5 Ng8 7.d4) 5.g4 (5.Nf3 Bd6 6.Bb2 Qe7 7.c4; 5.Bb2 Bd6 6.Nf3 Qe7 7.c4) 5...a5 (5...h5 6.g5 Ng8 7.Nf3) 6.g5 ab4 (6...Ng8 7.Qh5 Ke7 8.Qg4+=) 7.gf6+/– Qf6 8.Qh5 Qf7 9.Qf7 Kf7 10.Bg2 c6 11.Bh3 (11.Nf3 Bd6 12.Bh3 ba3 13.Ba3 b5+/–) 11...Bd6 12.Bb2 (12.Nf3 b5+/–) 12...ba3+= 13.Nf3 Kf6 14.Na3 Na6 15.Rg1 g6 16.Ng5 Nb4 17.Kd1 h6 18.Nh7 Rh7 19.Rg6 Ke7 20.Rd6! Kd6 (20...Nc2 21.Kc2 (21.Nc2?! Ra1 22.Ba1 Kd6=) 21...Kd6 22.Nb5 cb5 23.Ra8 Rc7 24.Kb3+-) 21.Nb5! cb5 1–0. Karl Gill – Gary K, ChessWorld.net, 2009.

4.b5+/– Na5 5.Be5 d6 (5...Nc4 6.Bd4 d5 7.e3+/–) 6.Bc3 Nc4 7.e3 Nf6?? (better is 7...Nb6+/–) 8.Bc4+- d5 9.Bb3 Bd6 10.Qf3 Be6 11.Ne2 0-0 12.Nd4 Bd7 13.Bd5 Kh8 14.Bb7 Rb8 15.a4 Ne4 16.Be4 fe4 17.Qe4 Qg5 18.Nf3 Qh6 19.d3 Rbe8 20.Qh4 Qg6 21.Qg5 Bf5 22.Qg6 Bg6 23.Nbd2 h6 24.Nc4 Bc5 25.Nfe5 Bh5 26.g4 Bf7 27.Nf7 Rf7 28.Ne5 Rfe7 29.Ng6 Kg8 30.Ne7 (30...Be7 31.e4+-) 1–0. Nda_Vie (2095) – helmisflorin, internet, 2009.

4.b5 Nce7 5.c4 (5.Be5!? a6 6.Nc3+-) 5...e4+= 6.e3 a6 (6...c6 7.Nc3+=) 7.a4 (better 7.Qh5!? Ng6 8.Qf5+=) 7...ab5 8.cb5 c6 (8...d5 9.Ne2=) 9.Be2 cb5 (9...Nf6 10.Bf6 gf6 11.Bh5 Ng6 12.Nc3=) 10.Nh3 (better 10.Bb5 Nc6 11.Ne2+=) 10...Nc6? (10...b4 11.Qb3 Qa5 12.Bb5+=) 11.d3?? (better 11.Bh5!? Ke7 12.Nc3+-) 11...d5 (11...Nf6 12.ab5 Ra1 13.Ba1+=) 12.ab5 (12.Bh5 Ke7 13.ab5 Ra1 14.Ba1+- (worse 14.bc6 Qa5 15.Bc3 Qc3 16.Nc3 Rd1 17.Bd1 bc6–/+)) 12...Nce7?? (better 12...Ra1 13.Bh5 Ke7 14.Ba1 Nb4+-) 13.Ra8+- b6 (13...Nf6 14.0-0 Kf7 15.Nd2+-) 14.de4 de4 (14...fe4 15.Nf4 Nf6 16.Bf6 gf6 17.Nc3+-) 15.0-0 Qd1 16.Rd1 Nf6 17.Bf6 gf6 18.Bh5 Ng6 19.Nf4 (better 19.Rc8 Kf7 20.Nf4+-) 19...Ke7 20.Bg6 (20.Ra7 Bb7 21.Rb7 Ke8 22.Ng6 Rg8 23.Nf8 Rg6 24.Nh7 f4 25.Bg6) 20...hg6+- 21.Ng6 Ke6 22.Nh8 Ke5 23.Rc8 Bc5 (23...Be7 24.Rc7 Ke6 25.Rc6 Bd6 26.Rcd6 Ke7 27.Rd7 Kf8 28.Ng6 Kg8 29.Rc1 f4 30.Rc8) 24.Re8 Be7 25.Re7 1–0. Benreguia,Frederic – Cavaille,Cedric, FICGS, 2012.

4.c4 d4 5.d3 Nf6 6.Nd2 Be7 7.g3 0-0 8.Bg2 Be6?? 9.Ngf3 (9.Bb7 Nbd7 10.Ba8 Qa8+-) 9...Nbd7 10.0-0 (10.Ng5!? Bf7 11.Bb7+-) 10...Bf7 11.Qc2 Bg6 12.Rfe1 c5 13.b5 b6 (13...Ng4 14.h3 Nh6 15.e3=) 14.a4 (14.Ng5 Qb8+/-) 14...e4 15.de4 (15.Nh4!? Qe8 16.Ng6 Qg6 17.de4+/-) 15...fe4 16.Nh4 d3?? (16...Bf7 17.Ne4 Ne4 18.Qe4 A) worse 18...Bc4 19.Nf5 (19.Qa8?! Qa8 20.Ba8 Ra8+=) 19...Bf6 20.Nd6+-; B) 18...Bh4 19.Qa8 Qa8 20.Ba8 Ra8 21.gh4 Ne5+=) 17.ed3+- ed3 18.Qc3 Bf7 (18...Rb8 19.Ng6 hg6+-) 19.Nf5 g6 (19...Bd6 20.Nd6 Bg6+-) 20.Ne7 Kg7 21.Ba8 Qa8 22.Ne4 Re8 23.Nf6 Re7 (23...Re7 24.Nd7 Re5 25.Qe5 Kh6 26.Bc1 d2 27.Bd2 g5 28.Qg5; 23...Qf3 24.Nd7 Kh6 25.Qg7 Kg5 26.Re5 Kg4 27.h3 Kh3 28.Qh7 Qh5 29.Rh5 gh5 30.Qf5). ribarisah (2155) - rafurni (2120), Rated Bullet game, lichess.org, 2016.

4.Be5+= d4 (4...Nc6 5.Bb2+=) 5.Nf3 Nc6 6.Bg3 Bd6 7.Bd6 Qd6 8.c3 dc3 9.Nc3 Be6 10.e3 0-0-0 11.d4 Bd5 (11...Nf6!?+/–) 12.Nd5+- Qd5 13.Bd3 g6 14.Qc2 Nge7 15.0-0 h5 16.Rac1 h4 (16...a6 17.Ne5+-) 17.h3 (better is 17.b5 h3 18.bc6 Nc6+-) 17...Rdf8 (17...a6+-) 18.b5 g5 19.bc6 Nc6 (19...Qc6 20.Bc4+-) 20.Ne5 Rh7 (20...Qe6 21.Nc6 bc6 22.Qa4+-) 21.Nc6 (better is 21.Bf5 Rf5 22.Qf5 Rd7+-) 21...bc6 22.Qc6 Qc6 23.Rc6 f4 (23...Re7+-) 24.Bh7 1–0. Fournier,Frederic (1810) – telucai, Active, 2011.

(--> 1.b4 e5 2.Bb2 d6 3.a3 f5).

4.c4 Nf6 5.e3 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 Nf6 5.c4).

4.d4 e4 5.e3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 Nf6 5.d4 e4).

4.e3 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3).

4.Nf3 Nf6 5.e3 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 Nf6 5.Nf3).

4.g3 Nf6 5.Bg2 (--> 1.b4 e5 2.Bb2 d6 3.g3 f5 4.Bg2 Nf6 5.a3).

4.c4 Nf6 5.e3 Be7 6.d3 0-0 7.Nc3 c6 8.Nge2 d5 9.cd5 cd5 10.de4 fe4 11.Nf4 Ng4? (better 11...Nc6 12.Ncd5 Nd5 13.Qd5 Qd5 14.Nd5 Bd6+/-) 12.Qd5+- Qd5 13.Nfd5 Bf6 (13...Bh4 14.g3 Bd8 15.Ne4 Nd7+-) 14.Nc7 Nf2 (14...b5 15.Na8 Nf2 16.Rg1+- (16.Kf2?! Bc3 17.Kg1 Bb2=)) 15.Bc4 (15.Na8?! Nh1 16.Nc7 Be5=) 15...Kh8 16.0-0 (16.Na8?! Nh1 17.Rb1 Nf2=) 16...Ng4 (16...Nd3 17.Bd3 (worse 17.Na8 Nb2 18.Bb3 Na6+-) 17...ed3 18.Na8+-) 17.N3d5 Nd7 18.Bf6 Ndf6 19.Na8 b5 (19...Bd7 20.Nac7+-) 20.Bb5 Bb7 (20...Rd8 21.Nac7+-) 21.Nac7 a6 (21...Rg8 22.Nf6 gf6 23.Rae1+-) 22.Ba6 Ba6 23.Na6 Ra8 (23...Rd8 24.Nac7 h5 25.Rfd1+-) 24.Nac7 Rc8 (24...Rb8 25.a4 Nd5 26.Nd5+-) 25.a4 Ne3 26.Ne3 Rc7 27.a5 1-0. Adlai – Nagor, internet, 2021.

4.e3 Nf6 5.c4 d5 6.Nc3 c6 7.Be2 Be7 (7...dc4 8.Bc4 b5 9.Be2=+) 8.d3 0-0 9.de4 fe4 10.cd5 cd5 11.Qb3 Be6 12.Rd1 The pressure on the backward pawn d5 grows 12...Nc6 (12...a5 13.Nh3 ab4 14.ab4 Bh3 15.gh3 Qd6 16.Nd5 Kh8+=) 13.Nh3= Qd7 14.Nf4 Increases the pressure on the backward pawn (14.Ng5 Rad8 15.b5+/-) 14...Bf7 (14...Rad8 15.f3 Bf7 16.fe4+=) 15.Qc2 (better 15.Ncd5!? Nd5 16.Nd5+/-) 15...Rad8 16.0-0 Ne5? (16...Bd6 17.Ncd5 Nd5 18.Nd5 Qe6+/-) 17.Ne4+- Ne4 18.Be5 Qf5 19.Bd4 (better 19.Bc7 Rc8 20.Nd5+-) 19...Bd6? (19...Rc8 20.Qb1 Qg5 21.Bd3+- (21.Ba7?! Nc3 22.Qd3 Nd1 23.Rd1 Ra8+=)) 20.Nd3 (better 20.f3 Bf4 21.fe4 (21.ef4?! Rc8 22.Bc5 b6+/-) 21...Bh2 22.Kh2+-) 20...Qg5+/- 21.Bf3 (21.Ba7 Rc8 22.Nc5 Qh6+/-) 21...Qh4 22.g3 Bg3?? (better 22...Qe7+/-) 23.hg3 Ng3 (23...Qg5+-) 24.fg3 Qg3 25.Bg2 (25.Qg2 Qg2 26.Bg2 b6+-) 25...h5 (25...Bh5 26.Rf8 Rf8 27.Rf1+-) 26.Qf2 (better 26.Rf3 Qd6+-) 26...Qd6 (26...Qf2 27.Rf2 b6 28.Rdf1+-) 27.Qh4 (27.Bc5 Qe6 28.Bf8 Rf8+-) 27...g5 (27...b6+-) 28.Qh5 (better 28.Qg5 Qg6 29.Qe5+-) 28...Bh5-+ 29.Rf8 Rf8 (29...Kf8?! 30.Rf1 Ke8 31.Nc5-+; 29...Qf8?! 30.Rf1 Qd6 31.Rf6-+) 30.Ne5 (30.Rd2-+) 30...Bd1 31.Kh2 Qh6 (better 31...Rf5 32.Kg1-+) 32.Kg3 (32.Kg1 Qh4 33.Bd5 Kh7 34.Nf7 Qg4 35.Kf1 Qf5 36.Ke1 Qd5 37.Kd1 Rf7 38.Ke1 Qg2 39.Bf6 Rf6 40.e4 Rf1) 32…Qh4 0-1. alddhsfd (2010) - nudeoldman (2000), lichess.org, 2021.

4.f3 ef3 5.Nf3 b6 6.g3 Bb7 7.Bg2 Nf6 8.0-0 a5 9.c3 ab4 10.ab4 Ra1 11.Ba1 c5 12.bc5 Bc5 13.d4 Bd6 14.e3 (14.Qb3 Rf8+=) 14...0-0 15.Nbd2 Nc6 16.Qc2 Ng4 17.Re1 Qg5?? (better is 17...Qc7 18.Qb3 Kh8=) 18.Ng5 Re8 (18...Nh6 19.Qb3 Kh8 20.d5+-) 19.e4 (better is 19.Qb3!? Re6 20.Ne6 Na5 21.Qb6 de6 22.Qd6 Kf7+-) 19...fe4 20.Nge4 (better is 20.Qb3 Re6 21.Ne6 Na5 22.Qb6 Be7 23.Qa5 e3+-) 20...Ba3 21.Bb2 Bf8 22.h3 Nh6 23.Nf3 Nf5 24.Qb3 Kh8 25.g4 Nfe7 26.Neg5 Na5 27.Nf7 Kg8 28.Nh6 Kh8 29.Qg8! Ng8 30.Nf7 1–0. Fournier,Frederic (1935) – maregua, Active, 2011.

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 d6 3.e3 f5 4.a3 Nf6).

4.Bb2 Bd6 5.Bc4 c6 (5...e4 6.Nc3=) 6.Nf3 Qe7 7.Ba2 (7.Nh4 g6=) 7...Bc7 8.c4 0-0 9.Nc3 a6 (9...e4 10.Nd4 d6 11.0-0=) 10.c5 (10.d4 e4 11.Nd2 Kh8=) 10...Kh8 11.d4 ed4 (11...e4 12.Ng5=) 12.Qd4+= Ng4 (12...d5 13.cd6 Bd6 14.Rd1+=) 13.h3 Ne5 14.Na4 Nf3 (better is 14...Ng6+/–) 15.gf3+- d5? (15...Qg5 16.0-0-0 Qf6+-) 16.cd6! Bd6 (16...Bd6 17.Rg1 Decoy; 16...Qd6 17.Qg7 mate Mate attack) 17.Rg1 Nd7 (17...Rf6 18.Qf6!! Qf6 (18...gf6?? 19.Rg8) 19.Bf6 Bf8+-) 18.Qg7 Qg7 19.Bg7 1–0. Cirulis,Ilmars (1700) – Koivuniemi,Raimo (2000), FICGS, 2015.

4.Bb2 e4 5.Ne2=.

4.Be2 d5 5.Bb2 Bd6 6.Bh5 Nh5 7.Qh5 g6 8.Qe2 0-0 9.Nf3 Qe7 10.d3 a5 11.b5 a4 12.0-0 Nd7 13.Nbd2 Nc5 14.c4 (14.Ne5 Be5 15.Be5 Qe5=+) 14...Bd7 (14...e4!? 15.Ne1 f4 16.de4 de4 17.ef4 Rf4-/+) 15.d4 ed4 16.Nd4 c6 17.bc6 bc6 18.cd5 cd5 19.Nb5?? (better 19.Rab1=+) 19...Rab8 20.Nd6 Rb2 (20...Qd6?! 21.Rab1 Bb5 22.Be5-/+) 21.N6c4 dc4 22.Qc4 Be6 23.Qd4 Rfb8 24.Nf3 Ne4 25.Rac1 (25.Qa4 Rc8-+) 25...Qd6 (better 25...Qa3 26.Qa7 Qb4-+) 26.Qa4 Bb3 27.Qa7 Bd5 28.Qd4 Bf7 29.Qa7 R2b7 30.Qa5 Qb6 31.Qe5 Qb2 32.Qa5 Qb5 33.Qe1? (33.Qb5 Rb5 34.Nd4-+) 33...Ra7 (better 33...Bc4 34.Nd4 Qa6-+ (34...Bf1?! 35.Nb5 Bb5 36.f3=)) 34.Nd4-/+ Qa5 (better 34...Qe8 35.f3 Nf6=+) 35.Qe2?? (better 35.Qa5 Ra5 36.Nc6=) 35...Qa3-+ 36.Nc6 (36.Rc2 Rab7 37.Qe1-+) 36...Rb2 37.Qd1 Rab7 (better 37...Rd2!? 38.Qe1 Ra8 39.Ne5-+) 38.Qd8 Qf8 39.Qd4 Rd2 40.Qa1 Rbd7 (40...Bd5 41.Qe5-+) 41.Ne5 Rd8 42.f3 (42.Rc7 Be6 43.Ra7-+) 42…Nd6 (42...Nd6 43.Rf2 Rf2 44.Kf2 Qe7-+) 0-1. azer3136 (2275) - eltenedor (2255), Rated Blitz game, lichess.org, 2016.

4.Be2 d5 5.Bh5 Nh5 6.Qh5 g6 7.Qe2 Bg7 8.Bb2 0-0 9.d3 Nc6 10.Nd2 Be6 11.Rb1 a6 12.Ngf3 e4 13.de4? (better 13.Nd4!? Nd4 14.Bd4 Bd4 15.ed4-/+) 13...de4-+ 14.Ng1 Ne5 (better 14...Bb2!? 15.Rb2 Qf6-+) 15.Nh3-/+ b5 16.0-0 h6 17.Nf4 Bf7 18.Rfd1 Qg5 19.Kh1 Rad8 20.Nf1 Bc4 21.Qe1 Qf6?? (21...Ba2 22.Ra1 Bf7 23.Bd4-/+) 22.Ng3?? (better 22.Be5 Qe5 23.Ng6+-) 22...h5?? (better 22...Qc6-/+) 23.Be5+- Qe5 24.Ng6 Rd1 (24...Qc3 25.Nf8 Qe1 26.Re1 Kf8 27.Rbd1+- (27.Nh5?! Bc3+-)) 25.Qd1 Qe8 26.Nf8 h4 (26...Bf8 27.Qh5 Qh5 28.Nh5 Kf7+-) 27.Nf5 Qf8 (27...Kf8 28.Ng7 Kg7 29.Qg4 Kf7 30.Qf5 Kg7 31.Rd1+-) 28.Qg4 1-0. rezam63 (2100) - mhabib (2175), Rated Blitz game, lichess.org, 2016.

4.Be2 Be7 5.Bh5 g6 6.Be2 0-0 7.Bb2 d6 8.d3 Kh8 9.Nf3 Be6 10.Nbd2 Nbd7 11.c4 Ne8 12.0-0 Ng7 13.Qc2 h6 14.Rfe1 Kh7 15.Nf1 c6 16.Ng3 Qe8 17.a4 a6 18.Rab1 Qf7 19.Ba1 b5 20.a5 Rfc8 21.Bc3 (21.c5 Ba2 22.Rb2 Be6+=) 21...e4 (better 21...bc4 22.dc4 Bc4 23.Bc4 Qc4-/+) 22.de4+= Bc4 23.ef5 Nf5 24.Nf5 Qf5 25.Qf5 gf5 26.Nd4 (better 26.e4!?+/-) 26...Be2 27.Re2 Bf6 28.Rc1 Kg6 29.h3 c5 30.Ne6? (better 30.bc5 Rc5 31.Bb2-/+) 30...cb4-+ 31.Nf4 Kf7 32.Bf6?? (32.Bb2 Rc1 33.Bc1-+) 32...Rc1 (32...Nf6?! 33.Rb2=+; 32...Kf6?! 33.Rd1=) 33.Kh2 Nf6 34.Rd2 (34.Rb2 Rc4-+) 34…d5! (34...d5 35.Rb2 Ra1-+) 0-1. azer3136 (2245) - hutgovy (2190), Rated Blitz game, lichess.org, 2016.

4.h3 c5 5.bc5 Bc5 6.Bb2 d6 (6...Nc6 7.Nf3 e4 8.d4=+) 7.g3 (7.d4 ed4 8.ed4 Bb6=) 7...a6 (7...0-0 8.d4 ed4 9.Bd4 Bd4 10.Qd4=+) 8.Bg2 Nc6 9.d4 Bb6 (9...Qb6 10.Bc6 Qc6 11.Rh2 ed4 12.ed4=+) 10.de5 de5 (10...Ba5 11.Bc3 Bc3 12.Nc3=) 11.Qd8 Bd8 12.Nc3 (better is 12.Bc6!? bc6 13.Be5+=) 12...e4 13.Nge2 0-0 (13...Na5 14.0-0-0=+) 14.Rd1 (14.0-0-0 Bc7=) 14...Be6 (14...Na5 15.f3 Nc4 16.Bc1=+) 15.Nf4 Bc4 16.Ncd5 (16.g4!?=) 16...Ba5=+ 17.c3 (17.Bc3 Nd5 18.Nd5 Bd5 19.Ba5 Na5 20.Rd5 Nc4=+) 17...g5 (17...Nd5!? 18.Nd5 Ne5–+) 18.Nf6=+ Rf6 19.Ne2 (19.Nd5!? Re6 20.Nb4=+) 19...Ne5–+ 20.Ba1 Nd3 21.Kf1 Re8 22.Kg1 Ne5 (better is 22...b5!?–+) 23.Nd4=+ g4 24.hg4= fg4 25.Be4+= Ng6? 26.Bg6 26...Rg6+/– 27.Rh4 b5 28.Nf5 Bd8 29.Nh6 (29...Kf8 30.Rh2=). beammeupscotty (2115) – malaysianisme, net–chess.com, 2004.

4.h3 d5 5.Bb2 Bd6 6.c4 =+.

4.Nc3 Nf6 5.Bd3 fe4 6.Ne4 Be7 7.Nf6.

4.ef5 Bf5 5.Nc3 Nf6 6.Nf3 (6.Qf3 Qc8 7.Bd3 Be6=) 6...Be7 (6...Nc6 7.d4=) 7.d4 (7.Bd3!? e4 8.Nd4=) 7...e4–/+ 8.Nh4 Bc8 (8...Be6 9.g3+=) 9.Be2 0-0 10.0-0 Ne8 11.Bc4? (better is 11.g3!? Bh4 12.gh4 Qh4 13.f3+=) 11...Kh8–/+ 12.g3 (12.f3 Bh4 13.fe4 Nd7–/+) 12...Bh4 13.Qh5?? (better is 13.gh4!? Qh4 14.Qe2–+) 13...Bf6 (13...Be7 14.d5 (14.Ne4 Rf5 15.Qe2 d5–+) 14...Nf6 15.Qd1–+) 14.Be3 (14.Ne4 Bd4 15.c3 Bf5–+) 14...g6 (14...Be7 15.Nd5 (15.Ne4?? Rf5 16.Qe2 d5–+) 15...Rf5 16.Qd1–+) 15.Qe2 Bg7 16.Bd5 (16.Ne4 Nc6 17.Bg5 Qd7–+) 16...Nf6 17.Be4 Ne4 18.Ne4 Bf5 19.f3 Qe8 20.Nf2 (20.c3 Nc6–+) 20...Qa4 21.Rfc1 (21.g4 Bc2 22.Rac1 Bb3 23.Rc7 Nc6–+) 21...Nc6 22.c3 Rae8 23.Qd2 Qb3 24.g4 (24.Rf1 Ne7 25.g4 Nd5–+) 24...Bd7 25.f4 Qc4 26.h3 (26.f5 gf5 27.g5 Qd5–+) 26...Ne7 27.Nd3 (27.Qd3 Qd3 28.Nd3 Nd5–+) 27...Bb5 (27...Nd5!? 28.Nb2 Qb3 29.Nd1–+) 28.Nb2 Qe2 (28...Qb3 29.a4 Nd5 30.Nd1–+) 29.a4 (29.Qe2 Be2 30.Re1 Ba6–+) 29...Qd2 (29...Nd5!? 30.Qe2 Be2 31.Bd2 Nb4 32.cb4 Bd4 33.Kg2 Bb2 34.Bc3 Bc3 35.Rc3 Rf4 36.Rc7 Rb4 37.Rac1–+) 30.Bd2 Bd7 (30...Be2 31.Rc2 Nd5 32.Re1–+) 31.Re1 Nd5 32.Re8 (32.b5 h5–+) 32...Re8 33.Kf2 (33.Nc4 a6–+) 33...Nb4! 34.Re1 (34.cb4 Bd4 Double attack) 34...Re1 35.Be1 (35.Ke1 Nd5–+) 35...Nc2 36.Bd2 (36.Ke2 h5 37.f5 Ne1 38.Ke1 gf5 39.gh5 Kh7–+) 36...Nd4! 37.cd4 (37.Ke1 Nb3–+) 37...Bd4 38.Be3 Bb2 39.Ba7 Ba4 40.Ke3 (40.Kg3 c5–+) 40...c5 41.Bb8 (41.Ke4 Bc6 42.Kd3 Bc1–+) 41...d5 42.f5 (42.Bd6 Bd4 43.Kd3 Kg7–+) 42...gf5 43.gf5 (43.Bd6 fg4 44.hg4 Bd4 45.Kd3 Bd7–+) 43...Kg8 44.Bd6 (44.Ba7 Bd4 45.Kf3 b5–+) 44...Bd4 45.Kf4 c4 0–1. Ivanets,Vladimir – Usmanov,Ilnur, 5th Cup Governov B, 2009. (=1.a3 e5 2.b4 f5)

4.ef5 Bf5 5.Qf3 Qc8 6.Bc4 Nf6 7.d3.

3.c4 c5 4.b5=.

3.c4 c6 4.e3 d5 5.Qb3 (5.Nc3 Ne7=) 5...Be6 6.Nc3 Ne7 7.Bb2 Nf5 (7...Nd7 8.Nf3=) 8.cd5 Bd5 (8...cd5 9.Bd3=) 9.Nd5 Qd5 10.Qc2 Nd6 11.Nf3 (11.Ne2 Nd7+=) 11...Be7 12.d4 Nd7 (12...e4!? 13.Nd2 Nd7=) 13.de5+/– Ne5 14.Be5 (14.Ne5!? fe5 15.Rd1+/–) 14...fe5= 15.Rd1 Qe6 16.Qc5 Qa2? (16...Nb5!? 17.Qc1 Nd6=) 17.Rd6 (better is 17.Qe5!? Nf7 18.Qg7 Qa3 19.Bd3+/–) 17...Bd6+/– 18.Qd6 Qa1 19.Ke2 Qa2? (19...Qb2 20.Qd2 Qa3 21.Ne5+/–) 20.Qd2 (20.Nd2 Qd5 21.Qd5 cd5+-) 20...Qc4? (better is 20...Qa3 21.Ne5 Rd8+/–) 21.Ke1+- Qb3 22.Bd3?? (22.Qc1 Qd5 23.Bc4 Qd6+-) 22...Rd8? (better is 22...0-0-0 23.Bf5 Kb8+/–) 23.Ne5+- Qa3 24.Ke2 Qb3 25.Rd1 Qd5 (25...Rf8 26.Kf1+-) 26.Nf3 (26.Qc3 Qa2 27.Kf1 Qe6+-) 26...0-0 (26...Qb3 27.Bg6 Ke7 28.Bd3+-) 27.Qc2 (27.Bh7!? Kh8 28.Bd3 Qh5+-) 27...Qh5 (27...Kh8 28.Kf1+-) 28.Qc4 (28.Qa2!? Kh8 29.Qa7 Qf7+-) 28...Kh8 29.Qh4 (29.h3 a6+-) 29...Qh4 30.Nh4 Rd5 31.Nf5! g6 (31...Rdf5 32.Bf5; 31...Rff5 32.e4) 32.Nd4 Rfd8 (32...Rh5 33.h3+-) 33.Bc4 R5d6 34.Ra1 b5 (34...a6 35.Kf3+-) 35.Bb3 R8d7 36.Rc1 1–0. Eremin,Mikhail – Avanesov,Roman, Ryazan Region Championship FL, 2010.

3.c4 Ne7 4.Nc3 (4.e4 f5=) 4...c6 (4...d5 5.cd5 Nd5 6.e4 Nc3 7.dc3 Qd1 8.Kd1=) 5.g3 (5.d4 a5 6.b5 ed4 7.Qd4 d6+=) 5...d6 (5...d5 6.cd5 Nd5 7.e4=+) 6.Bg2 (6.d4 d5 7.de5 fe5 8.cd5 Nd5=) 6...Nf5 (6...Be6 7.d3=+) 7.e3 (7.d3 Be6=) 7...Be7 (7...Be6 8.d3=) 8.Nge2 (8.d4 0-0=) 8...0-0 (8...Be6 9.d3=) 9.0-0 (9.d4 a5 10.b5 Qe8+=) 9...Be6 10.d3 Nd7 11.Bb2 (11.e4 Nd4 12.Nd4 ed4+=) 11...Rc8 (11...Qb6 12.Qd2=) 12.e4 b6?? (better is 12...Nh6=) 13.f4?? (better is 13.ef5 Bf5 14.f4+-) 13...Ne3–/+ 14.Qd2 Ng2 15.Kg2=+ Qe8 16.f5= Bf7 17.a4 a5 18.b5 d5 19.g4?? de4 20.Ne4=+ Nc5 21.Qe3 cb5 22.ab5 Bd8?? 23.Ba3 Qd7+= 24.Bc5 Re8?? 25.Ba3+- h6 26.Nd6 (26...Bc7 27.Ne8 Re8 28.Rfd1+-) 1–0. renegade – aliwood, internet, 2005.

3.d4 d6 4.e3 Nd7 5.Bb2 Qe7 6.c4 Nb6 7.c5 Nd5 (7...dc5!? 8.dc5 Nd7+/–) 8.de5 de5? (better is 8...Be6 9.Bb5 Kf7+-) 9.Qd5 c6 10.Qb3 Nh6 11.Qa4 Bg4 12.Be2 Bf5 13.Nc3 e4 (13...Qf7 14.Bf3 Bd7 15.Rd1+-) 14.Nd5 (14...Qf7 15.Nb6+-) 1–0. Scarian – aliwood, internet, 2005.

3.e4 a5=.

3.e4= Nc6 4.Bc4+=.

3.e4 d5 4.ed5 Qd5 5.Nc3 Qf7 6.Nf3 (6.Bb5 c6 7.Be2 Be6=) 6...Be6 (6...Nc6 7.Bb5=) 7.Bd3 (7.d4 ed4 8.Nd4 Bd6+=) 7...Ne7 (7...Nd7 8.Nb5 Nb6 9.Be4=) 8.Be4 Nd5 (8...Nbc6 9.b5 Na5 10.d3=) 9.0-0 (9.Bd5 Bd5 10.d4 Nc6 11.Nd5 Qd5 12.de5 Qd1 13.Kd1 Ne5 14.Ne5 fe5+=) 9...Nc3 (9...c6 10.Ne2=) 10.dc3 c6 11.Be3 (11.Qe2 Nd7=) 11...Be7 12.Bd3 Nd7 13.Re1 0-0 14.Qe2 Rad8 (14...a5 15.Bd2=) 15.Ba7+= g6 (better is 15...Ra8!? 16.Be3 Ra4+=) 16.Nd4+/– Bd5 (16...Kh8 17.Ne6 Qe6 18.Bc4+-) 17.c4+- Be6 18.Ne6 Qe6 19.Be3 (19.c5 Kg7 20.Bc4 Qf5+-) 19...f5 (19...Kg7 20.c5 f5 21.Rad1+-) 20.c5 (20.Bh6 Rf7 21.c5 g5+-) 20...Bf6?? (better is 20...Kg7+-) 21.Bc4 (21...Nc5 22.Bc5+-) 1–0. b4_player – opponent, gamecolony.com, 2007.

3.e4= Bd6 4.Nf3+= Nc6 (4...a5 5.b5+=) 5.Nh4 (better is 5.Bc4+=) 5...f5 (better is 5...g6!? 6.Bc4 Bf8+=) 6.Nf5+/– Bf8 7.b5 (7.Bc4 g6 8.Ne3 Nf6+-) 7...Nce7 8.Bb2 (8.Ne7 Qe7 9.Nc3 Qc5+/–) 8...d6 9.Ne3 (better is 9.Ne7 Be7 10.f4+/–) 9...d5 (better is 9...Nf6!? 10.Nc3 Be6+/–) 10.ed5 Nd5 (10...Ng6+-) 11.Qh5 Ke7 12.Bc4 (12.Qe5 Be6 13.Nd5 Qd5 14.Qc7 Qd7+-) 12...Ndf6 (12...Ngf6 13.Qe5 Be6+-) 13.Qe5 (13...Kd7 14.Qe6) 1–0. Wall,Bill – DrummerBoy, internet, 2003.

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

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

4.c3 cb4 5.ab4 a6 6.Bc4 b5 7.Bg8 Rg8 8.Qh5 g6 9.Qh7 Rg7 10.Qh4 Bb7 11.d3 Nc6 12.Nf3 1–0. pillsbury (2145) – israelflavio (2445), net–chess.com, 2014.

4.c3 cb4 5.ab4 d5 6.ed5 Qd5=.

4.c3 cb4 5.cb4 d5 6.d4 ed4 7.Qd4= de4 8.Qe4 Qe7 9.Bd3 Nc6 10.Nf3 Bg4 11.0-0+= Qe4 12.Be4 Bf3 13.Bf3+/– Nge7 14.Nc3 Kf7 15.Rd1+/– Rd8 16.Be3 Rd1 17.Rd1 g6 18.Rd7+- b6? 19.Bc6 (19...Ke6 20.Ba4+-) 1–0. Steingraeber,Barbara (1770) – von Rosenberg,Clemens (1670), E7Kl033 DESC, 2002.

4.c3 d5 5.ed5 Qd5 6.d3=.

4.bc5 Bc5 5.Bc4 Ne7=.

4.Nf3 cb4 5.ab4 Bb4 6.c3 +=.

4.Nf3 Nh6 5.Bc4 b5 (5...cb4!? 6.c3 Qc7+/–) 6.Bb5+- Ba6 (6...Nc6 7.Nc3+-) 7.Ba6 Na6 8.b5 Nc7 9.c4 Be7 (9...Bd6 10.d3 Ng8 11.Nc3+-) 10.0-0 0-0 11.d3 Nf7 12.Nc3 Ne6 13.h4 Nd4 (13...Nd6 14.h5+-) 14.Nd5 Nd6 (14...f5 15.Nd4 cd4 16.ef5 Bh4 17.Qg4+-) 15.Nd4 ed4 16.h5 h6 (16...f5 17.e5 Nf7 18.h6 Ne5 19.hg7+-) 17.Qg4 f5 (17...Nf7 18.Bd2 Re8 19.f4+-) 18.Qg6 Kh8 (18...fe4 19.Bh6 Rf7 20.Bf4 Rf4 21.Nf4+-) 19.Bf4 Ne8 20.ef5 Nf6 (20...Bg5 21.Bh2 Bh4 22.Qg4+-) 21.Nc7 Rc8 22.Rfe1 Nh7 (22...Rg8 23.Qf7 Bf8 24.Nd5+-) 23.Nd5 Bf6 (23...Bg5 24.Bd6+-) 24.Bd6 Rg8 25.a4 Qa5 26.Re2 a6 (26...Bg5+-) 27.b6 Rc6 (27...Nf8 28.Qf7 Nh7 29.b7+-) 28.b7 Rd6 29.Re8 Rb6 30.Qf7 (30.Qf7 Re8 31.Qe8 Nf8 32.Nf4 Kh7 33.Ng6 Be7 34.Qe7 Ng6 35.fg6 Rg6 36.hg6 Kg6 37.b8Q Qe1 38.Re1 d6 39.Qbe8 Kf5 40.Qg7 d5 41.Qee5#) 1–0. Trokenheim,Marek (1780) – Kalinin,Vyacheslav, SB–2012–0-00228, 2012.

3.Bb2 (--> 1.b4 e5 2.Bb2 Qf6 3.a3).

3.Nc3 c6 4.e4 a5 5.b5 Bc5 6.Nf3 Nh6 (6...d6 7.Na4=) 7.Na4 (7...d6 8.Nc5 dc5 9.Bb2+=) +=. MickeyMouse – SweeneyTod, ChessWorld.net, 2002.

3.Nc3 d6=.

3.e3 Nh6 4.Bb2 d5 5.Nf3 e4 6.Bf6 ef3 7.Qf3 gf6 8.h3 Bg4 9.hg4 Nf5 10.gf5 Nd7 11.Qd5 Ne5 12.d4 Be7 13.de5 c6 14.Qf3 fe5 15.Bc4 0-0-0 16.Nc3 b5 17.Bb3 Kb7 18.Ne4 f6 19.Nc5 Bc5 20.bc5 Rd7 21.Ke2 Rhd8 22.Rad1 Kc7 23.Qh5 Rd2 24.Rd2 Rd7 25.Rd7 Kd7 26.Qh7 Kc8 27.Qg7 a5 28.Rh8 Normal 1-0. levtraru (2130) - ELGRANCACHA (2100), Rated Bullet game, lichess.org, 2015.

3.e4 a5 4.b5=.

3.e4 Bc5 4.bc5 Nh6 (4...Qc6 5.Ne2+-) 5.Bb2 (5.Nc3 Na6+-) 5...d6 6.f4 (better is 6.cd6!? cd6 7.Qf3 Qg6+-) 6...Qf4 7.Nc3 Ng4 (7...dc5 8.g3 Qf6 9.Nd5+-) 8.h3 (better is 8.Qf3 Qh6 9.h3+-) 8…Qf2# 0–1. Gregor123 – Nordy@, mySchach.de, 2004.

3.e4 d6 4.Nc3 Be6 (4...a5 5.b5=) 5.Nf3+= Nh6 (5...Nc6 6.Bb5=) 6.d4 Nc6? (better is 6...ed4 7.Nb5 Qe7+/–) 7.d5+- Bd7 8.dc6 Bc6 9.Bb5 Bb5 10.Nb5 Qe7 11.Bh6 gh6 12.0-0 a6 13.Nc3 Bg7 14.Nd5 Qd7 15.Nh4 c6 16.Nb6 Qd8 17.Na8 Qa8 18.Nf5 Bf6 19.Nd6 Ke7 20.Nf5 Kf8 21.Qd6 Kg8 22.Qf6 b5 23.Qg7 1–0. Anna_Goldberg (1720) – BF, internet, 2007.

3.e4 Nh6 4.h3 (4.Nc3 Nc6=) 4...Nc6 5.Nf3 a5 6.b5 Nd4 7.Be2 Nf3 8.Bf3 c6 9.a4 cb5 10.ab5 Bc5 11.0-0 d6 12.d3 Qg6 13.c4 (better is 13.Bh5!? Qe6 14.Nc3=) 13...Bh3–/+ 14.Bh6 gh6 15.Kh2 Be6 16.Nc3 Bd4 17.Rc1 (17.Ra3 Bc3 18.Bh5 Qf6 19.Rc3 Qh4 20.Kg1 Rg8–/+) 17...Rg8–/+ 18.g3? (better is 18.Nd5 Bd5 19.cd5–/+) 18...Be3?? (better is 18...Bf2 19.g4 Be3–+) 19.Bh5–/+ Qg5 20.Nd5?? Bd5 21.fe3 Qg3 22.Kh1 Qg2 0–1. The Enchanter – monas, ChessWorld.net, 2005.

4.Bb2 cb4=+ 5.ab4 (5.Nf3 Nc6=+) 5...Bb4 6.Nf3 (6.Nc3 Bc3 7.Bc3 Nc6=+) 6...d6 (6...Nc6 7.Ra4 Qg6 8.Ne5 Qe4 9.Qe2 Qe2 10.Be2 Ne5 11.Be5=) 7.c3= Bc5 8.Bc4 (8.d4 Bb6=) 8...Bg4 (8...Qg6 9.d4 Bb6 10.Nbd2=+) 9.Be2 (9.d4 ed4 10.cd4 Bb4 11.Bc3 Bf3 12.gf3 Nc6 13.Bb4 Nb4 14.Qa4 Nc6=) 9...Nh6 (9...Nc6 10.Ra4–/+) 10.0-0 (10.d4 ed4 11.cd4 Bf3 12.Bf3 Nc6+=) 10...0-0 (10...Nc6 11.Ra4–/+) 11.d4=+ Bf3 (11...Bb6 12.Nbd2=+) 12.Bf3 ed4 (12...Bb6 13.Na3=+) 13.cd4= Nd7 (13...Bb4 14.Qb3 a5 15.Nc3=) 14.Qd2 (better is 14.e5!? Ne5 15.de5 de5 16.Qc2+/– (16.Bb7 Rab8–/+)) 14...Bb6= 15.Nc3 (better is 15.Rd1=) 15...Ba5?? (better is 15...Qd4 16.Qe2 Ne5–/+) 16.Ra5+- b6 17.Raa1 a5 18.Nd5 Qh4 19.g3 Qh3 20.Bg2 Qh5 21.Nf4 Qg5 22.Qe2 Ng4 23.h4 Qe7 24.Qg4 g6 25.Qe2 f5 26.e5 Rac8 27.Bd5 Kh8 28.Ne6 Rfe8 29.Ng5 de5 30.Nf7 Kg7 31.de5 Qb4 32.e6 Kg8 33.Nh6 Kf8 34.Ba3 Qa3 35.Ra3 Re7 36.Re3 Rc5 37.ed7 Rd7 38.Re8 Kg7 39.Nf5! Kf6 40.Qe6 1–0. katrica – ketanmeh, internet, 2007.

4.c3 cb4 5.ab4 a5 6.ba5 Bc5 7.Nf3 g5 8.d4 ed4 9.cd4 Bd6 10.Bg5 Qg6 11.e5 Bb4 12.Ke2 d5 13.g3 b6 14.Qa4 Bd7 15.Qb4 ba5 16.Qc5 Ne7 17.Qe7# 1–0. Duffer – Vical, ICS game chess.net, 1998.

4.Nc3 cb4 5.ab4 d5 6.Nd5 Qd6 +/–.

3.Bb2 f6 (--> 1.b4 e5 2.Bb2 f6 3.a3 g6).

3.Bb2 Nf6 4.Be5 Bg7 5.Bb2 0-0 6.Nf3 Nc6 (6...a5 7.e3+=) 7.e3+- d5 (7...Re8 8.Be2+-) 8.Be2 a5 (8...Re8 9.0-0+-) 9.b5 Ne7 10.0-0 c6 (10...Bg4 11.Be5+-) 11.bc6 (11.Nc3 Ne4+-) 11...bc6 12.c4 Rb8 (12...Re8 13.Be5+-) 13.Qc1 (13.Be5 Rb7+-) 13...Ne4 (13...dc4 14.Be5 Rb7 15.Bc4+-) 14.Bg7 Kg7 15.d3 Nf6 16.Nc3 (16.Nbd2 Re8+-) 16...dc4 (16...Bg4 17.cd5 cd5 18.Rb1+-) 17.dc4 c5 (17...Bf5 18.Rd1 Qb6 19.Na4+-) 18.Rb1 (18.Rd1 Qe8+-) 18...Be6 (18...Bf5 19.Rb5 Qc7 20.Rd1+-) 19.Rd1 Qc7 (19...Rb1 20.Qb1 Qb8 21.Qa1+-) 20.Nb5 Qc6 (20...Qb7 21.Ng5+-) 21.Rd6 (21.Qc3 a4+-) 21...Qa8 (21...Qc8 22.Qc3+-) 22.Ne5 (22.Ng5 Qb7+-) 22...Ne4 (22...Qe4 23.Qb2 Qh4 24.g3+-) 23.Bf3 Rfd8? (23...Kg8 24.Nd7 Bd7 25.Rd7+-) 24.Rd8 (better 24.Nc7 Nd6 25.Ba8 Ra8 26.Na8 Ra8 27.Rb6+-) 24...Rd8 25.Qb2 (better 25.Nc3 f5 26.Qb2+-) 25...Kg8? (better 25...Rd2 26.Qa1 f6+-) 26.Nc3 f5 27.Ne4 (27.Qb6 Qc8 28.Be4 fe4+-) 27...fe4 28.Be2 (28.Qb6 Bc4 29.Nc4 ef3 30.Qe6 Kf8 31.Qf6 Kg8 32.Qe7 Re8 33.Qc5 fg2+-) 28...Nf5 (28...Qa6 29.Qb6 Qb6 30.Rb6+-) 29.Qb6 (29.Ng4 Ng7 30.Nf6 Kh8+-) 29...Qc8 30.Nc6 Rd2 (30...Re8+-) 31.Ne7?? (better 31.Qa5 Re2 32.Rb8 (32.Qc5 Rc2–/+) 32...Qb8 33.Nb8+-) 31...Ne7–+ 32.h3?? (better 32.Re1–+) 32…Re2 0–1. Fournier,Frederic (1980) – EstevezEmilio (1945), Active, 2004.

3.Nc3 Bg7 4.e4 Nf6 5.Nf3 d6 (5...d5 6.Qe2=) 6.d4 (6.Bc4 Ne4 7.Ne4 d5=) 6...ed4 7.Nd4 c5 (7...0-0 8.Bg5=) 8.Nb3 (8.Ndb5 0-0 9.Bg5 h6=+) 8...cb4 (8...Qe7 9.Qe2=) 9.ab4 0-0 10.Ra4 (10.Be3 Re8 11.Qd3 Nc6=) 10...Re8 (10...d5 11.Nd5 Ne4 12.Be3=+) 11.f3 d5 12.Be3 (better 12.Bb5 Nc6 13.Be3=) 12...Nh5?? (better 12...Bd7 13.b5 Ne4 14.Ne4 de4 15.fe4 Bc3 16.Kf2 Re5=) 13.Nd5+- Qh4 (13...Nc6!? 14.b5 Ne7 15.Nb6 Bc3 16.Nd2+-) 14.Bf2 Qg5 15.h4 (15.Qd2!? Qe5+-) 15...Qe5+- 16.Bb5 (16.Ra7 Ra7 17.Ba7 Ng3+-) 16...Rd8 (16...Nc6 17.0-0+-) 17.Bb6! Qg3 (17...ab6 18.Ra8 Pinning (18.Ra8 Deflection)) 18.Kf1 Nf4?? (better 18...Bd7 19.c4 Re8 20.Bd7 Nd7+-) 19.Ne7 (19.Bd8 Qg2 20.Ke1 Qh1 21.Kd2 Qh2 22.Kc1 Nd5 23.ed5 Qf4 24.Qd2 Qf3–/+) 19...Kh8 20.Qd8 Bf8 21.Qf8 1–0. mtrc – thomasm, internet, 2002.

3.c4 a5 4.Bb2 Bg7 5.Nc3 ab4 6.ab4 Ra1 7.Ba1 (7.Qa1 Nc6 8.Qa4 Nf6=) 7...Ne7 (7...Nf6 8.Nf3+=) 8.e3 d5 (8...0-0 9.Qb3=) 9.cd5 (9.Qa4 Bd7 10.Qa8 dc4 11.Bc4 Nf5+=) 9...Nd5 10.Qb3 (10.Qa4 Bd7 11.b5 Be6+=) 10...Nb6+= 11.Nf3 0-0 12.Be2 (12.Ne4 Be6 13.Qc2 N8d7+=) 12...e4 13.Nd4 (13.Ne4 Qd5 Double attack (13...Ba1 Pinning; 13...Ba1 Deflection; 13...Qd5 Decoy; 13...Ba1 Clearance)) 13...Qg5 (13...Bd4 14.ed4 Re8 15.d5+=) 14.g3 (better is 14.Ne4!? Qg2 15.Bf3+=) 14...Qe7+= 15.0-0 Bh3 (15...Bd4 16.ed4 Nc6 17.Nb5+=) 16.Re1 N8d7 17.Bb2 ½–½. Zhou Jianchao (2580) – Zhao Jun (2575), Zhongshan CHN, FIDE zt, 2014. (=1.c4 e5 2.a3 g6 3.b4 a5)

3.c4 Nf6 4.Nc3 d5 (4...d6 5.e4 Nc6 6.Nf3 Be6 7.d3 Be7 8.Be2 a5+=; 4...a5 5.b5 Bg7 6.e4 d6 7.Nf3 Nbd7 8.Be2 Nc5+=; 4...Nc6 5.e4 Nd4 6.Nf3 d6 7.Be2 a5 8.b5 Bh6=) 5.cd5 Nd5 6.Bb2 Bg7 7.Nd5 Qd5 8.e3 a5=.

3.e4 a5 A) 4.Bb2 d6 5.d4 Bg7 6.de5 Nd7 7.Nf3 Ne5 8.Ne5 Be5 9.Be5=; B) 4.b5 Nf6 5.Nc3 Bg7 6.Qf3 d6 7.Bc4 Nbd7 8.Na4 Nf8 9.Ne2=.

3.e4= b6 4.Nc3 Bg7 5.Nf3 Bb7 6.Bb5 a6 7.Bc4 b5 8.Bb3 Ne7 9.Ng5 Ng8?? 10.Nf7+- Qe7 11.Nh8 Bh8 12.Bg8 Qh4 13.0-0 d5 14.Bd5 c6 15.Qf3 cd5 16.ed5 Bd5 17.Qd5 Ra7 18.Re1 Re7 19.Ne4 Nd7 20.Nd6 Kf8 21.Qa8 Re8 22.Qe8 Kg7 23.Qf7 Kh6 24.d3 Kh5 25.Qh7 Kg4 26.f3 (26.Re4) 1–0. erch – toon magpie, ChessWorld.net, 2005.

3.h3 Bg7 4.e4 Nf6 5.Nc3 0-0 6.Bc4 (6.Nge2 d5 7.ed5 Nd5 8.Nd5 Qd5=+) 6...c6 (6...Ne4 7.Ne4 d5 8.Bd5 Qd5 9.d3=+) 7.d3 d5 8.ed5 (8.Bb3 d4 9.Nce2 a5=) 8...cd5 9.Bb3 a6 (9...a5 10.Qf3=+) 10.Bg5 Qd6 (better is 10...Be6!?=+) 11.Bf6+= Bf6 (11...Qf6 12.Nd5 Qd6 13.Ne2+=) 12.Nd5 (12.Bd5 Qc7 13.Nge2 Rd8+/–) 12...Nc6 (12...Bg7 13.Rb1+=) 13.Nf6 Qf6 14.Qf3 Nd4?? (better is 14...Bf5 15.Rd1 a5 16.ba5 Ra5=) 15.Qf6+- 1–0. valerypavlovich (2120) – losertoo (1860), net–chess.com, 2006.

3.h4 Nf6 4.Bb2 d6 5.e3 Bg7 6.c4 0-0 7.Be2 a5 8.Nc3 (8.h5 g5+=) 8...Na6 (8...ab4 9.ab4 Ra1 10.Ba1+=) 9.h5= Nh5 (9...Bf5 10.g4 Be6 11.g5=) 10.b5 Nc5 11.d4 ed4 12.ed4 Nd7 (12...Ne6 13.Bh5 gh5 14.Qh5=) 13.Bh5 gh5 14.Qh5 Nf6 15.Qd1 (15.Qg5 Re8 16.Nge2 Be6+=) 15...Re8 16.Nge2 c6 (16...d5 17.cd5 Bf5 18.Qb3=) 17.Kf1 (17.Qd3 Bg4=) 17...Bf5 (17...cb5 18.cb5 Bg4 19.Qd2=) 18.Kg1 (18.Ng3 Bg6=) 18...Nd7 (18...cb5 19.Nb5 Bg4 20.f3=) 19.Ng3 Bg6 20.Nh5 Bh8 21.Ne2 (21.Nf4!?+=) 21...cb5 22.cb5 Qg5 23.Bc1 (23.Nc3 Rac8 24.Ng3 Nb6+=) 23...Qb5–/+ 24.Nef4 Rac8 25.Be3 Rc4 26.Rh3 (26.Ng6 fg6 27.Rb1 Qf5–/+) 26...a4 (26...Qa4 27.Qf3–/+) 27.Rg3 (27.Ng6 fg6 28.Rb1 Qf5–/+) 27...Qc6 28.Qg4 Nc5! (28...Bd4?! 29.Ng6 Ba1 30.Qc4 hg6 31.Rg6 Kf8 32.Qc6 bc6 33.Rd6=) 29.Qh4 (29.dc5 Bd4 Double attack (29...Ba1 Pinning; 29...Ba1 Deflection; 29...Bd4 Decoy)) 29...Ne4 (29...Bd4? 30.Bd4 Ne4 31.Nf6 Nf6 32.Bf6 Rf4 33.Qf4+-) 30.Rh3 d5 (30...Bf5 31.g4 Bg6 32.Rd1+=) 31.Ng6 hg6 (worse is 31...Qg6 32.Nf4 Qg7 33.Nd5+/–) 32.Ng3 Bf6 (32...Bd4 33.Bd4 f6 34.Ne4 de4 35.Qh8 Kf7 36.Rh7 Ke6 37.Qf6 Kd5 38.Qg5 Kd6 39.Qg6 Kd5 40.Qg5 Kd4 41.Rd1 Kc3 42.Qd2 Kb3 43.Rb1 Ka3 44.Qb2) 33.Qh6 Rd4 (33...Ng3 34.Qh7 Kf8 35.Rg3–/+) 34.Ne2 (better is 34.Bd4!? Bd4 35.Rf1+=) 34...Rc4–+ 35.Rd1 Nd6?? (better is 35...Bg7 36.Qh7 Kf8–+) 36.Bd4+= Rd4 37.Nd4 Qb6 (37...Qc5 38.Qh7 Kf8 39.Rhd3+=) 38.Nc2= Ne4 39.Ne3 Bg7 40.Qh4 d4 41.Nd5 Qd6 (41...Qd8 42.Qd8 Rd8 43.Nb4–/+) 42.Nf4 (42.Nb4 Qf6+=) 42...f5 (42...Qf6 43.Qf6 Bf6 44.Re1+=) 43.Rb1 b6 44.Nd3 Nc3 (44...Kf7 45.Rb4 Rh8 46.Qf4 Qf4 47.Nf4 Rh3 48.gh3+=) 45.Ra1 (45.Rb4 Kf7=) 45...Kf7 (45...Qf6!?–/+) 46.Qg5+= Qf6 47.Qd2 Re4 48.Kf1 g5 49.Re1 Qe6 (49...Bf8 50.Qb2–/+) 50.Rh7 (50.Rc1 f4 51.Re1 Bf8–/+) 50...Kg6–/+ 51.Rg7 (51.Rh3 Re1 52.Ne1 Qa2 53.Qa2 Na2–/+) 51...Kg7 52.Qg5 Kf7 (52...Qg6 53.Qd8 Qf6 54.Qc7 Kh6 55.g3–/+) 53.Qh5 Ke7 54.Rc1 Qc4 (54...Qf6 55.Qh7 Ke8 56.g3–/+) 55.Qh7 (55.Qg5 Ke8 56.Qh5 Kd8 57.Qh8 Kd7 58.Qh7 Kc6–/+) 55...Kd6 (55...Kd6 56.Qh2 Kc6–/+) 0–1. Cirulis,Ilmars (1980) – Daanen,Aard (2020), FICGS, 2016.

3.h4 Bg7 4.h5 Nf6 (4...d5 5.Bb2+=) 5.h6= Bh6?? (better is 5...Bf8=) 6.Rh6+- Nh5 (6...Nc6 7.Nf3 e4 8.Ng1+-) 7.d4 Qf6 (7...Nc6 8.Nf3 e4 9.Ng5+-) 8.Nc3 d6 (8...ed4 9.Nb5 Qb6 10.Qd4 Qd4 11.Nd4+-) 9.Nd5 Qg7 (9...Qd8 10.Rh5! gh5+-) 10.Nc7 Kd8 11.Na8 g5 (11...Nf4 12.de5 Qe5+-) 12.Rh5 Nc6 13.de5 Qe5 14.Nf3 Qa1 15.Bg5 f6 16.Qa1 1–0. Cirulis,Ilmars (1980) – Goldmund,Heike, FICGS, 2016.

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

4.c4 Bg7 (--> 3.Bb2 Bg7 4.c4 d6).

4.c4 a6 5.e3 c6 (5...d6 6.d4=) 6.d3 (6.d4 e4=) 6...b5 7.c5 d6 8.cd6 Qd6 9.Qc2 Bb7 (9...a5 10.ba5 Ra5 11.Nf3=) 10.e4 (10.Nd2 Nd7+=) 10...Ne7 11.Nd2 0-0 (11...a5 12.f4=) 12.Nb3+= Nd7 13.Na5 (13.Rd1!?+=) 13...Rab8 14.Rc1 Ba8 (14...Rfc8!?=+) 15.Nf3= Rbc8 16.Nb3 Bh6 (16...Rcd8 17.Nc5+=) 17.Rd1 Bg7 18.d4 Qc7 (18...ed4 19.Bd4 Qc7 20.Bg7 Kg7 21.Nc5 Nc5 22.Qc5+/-) 19.Nc5 (19.de5 Ne5 20.Be5 Be5 21.Ne5 Qe5+/-) 19...Nc5 20.dc5 (20.Qc5 ed4 21.Bd4 Bd4 22.Nd4 Rce8+/-) 20...Rfd8+= 21.Bd3 a5 22.0-0 a4 23.Bc3 Rd7 (23...f6 24.Qa2 Kh8 25.Rd2+/-) 24.Rd2 (24.Be2 Rd1 25.Rd1 Re8+/-) 24...Rcd8+= 25.Rfd1 Bb7 26.Qb2 Increases the pressure on e5 26...f6 27.Nh4?? (27.g4 h6+/-) 27...Bc8 (27...Bh6 28.Bb1 Bd2 29.Bd2-+) 28.h3 (better 28.Be2=) 28...Bh6-/+ 29.Be2 (29.Bb1 Bd2 30.Bd2 g5-/+) 29...Bd2-+ 30.Rd2 Rd2 31.Bd2 Be6 32.Be3 Bb3 33.Qc1 (33.Nf3 Bd1-/+) 33...Qc8 (33...Qd7 34.Kh2-+) 34.Kh2 (34.Nf3 Qd7 35.Nd2 Be6-/+) 34...Be6 (34...Qe6 35.Nf3-+) 35.Nf3-/+ Kf7 36.Qc2 Rg8 (36...Bb3 37.Qc3-/+) 37.Bd3 g5 38.Qe2 g4 39.Ng1 f5 (39...Qd7 40.hg4 Bg4 41.f3-+) 40.ef5 Bf5 (worse 40...Nf5 41.hg4 Ne3 42.Qe3=+) 41.Bf5 (41.hg4 Rg4 42.Nf3 Ng6-/+) 41...Qf5-+ (worse 41...Nf5 42.hg4 Ne3 43.Qf3 Nf5 44.gf5=+) 42.h4 (42.hg4 Qg4 43.Qg4 Rg4-+) 42...h5 (42...Nd5 43.Qd2-+) 43.g3 (43.Bg5 Nd5-+) 43...e4 (43...Nd5 44.Bd2-+) 44.Qc2 (44.Qa2 Nd5-+) 44...Nd5 45.Bd4 Ke6 46.Qe2 Rd8 47.Qa2 Ke7 (47...Kd7 48.Kg2-+) 48.Qe2 (48.Qd2 Nc7 49.Qb2-+) 48...Nb4! 49.Bf6 (49.ab4 Rd4 Eliminates the defender d4) 49...Kf6 50.Qb2 (50.ab4 Qd5 51.Qe1 Qd2-+) 50...Ke6 51.Qb4 (51.ab4 Rf8 52.f3 gf3 53.Nh3 Qh3 54.Kh3-+) 51...Qf2 52.Kh1 Rd4 53.Qb1 0-1. petrobbo (1975) - w88lvo (2005), ChessWorld.net, 2019.

4.c4 b6 5.e3 Bb7 6.Nf3 d6 7.Be2 Ne7 8.0-0 Nd7 9.Qc2 0-0 10.e4 (10.d4 ed4 11.ed4 d5+=) 10...a5 11.Nc3 f5 12.Ng5 Rf6 13.ef5 Nf5 (13...gf5 14.f4=) 14.Nce4+= Be4 15.Qe4 Ne7 16.Bg4 Nf8 17.f4 (17.Qe2 h6 18.Ne4 Rf7+=) 17...h6 (17...ab4 18.ab4 Ra1 19.Ba1 h5+/–) 18.Nh3+/– Rf7 19.fe5 d5 (19...Rf1 20.Rf1 ab4 21.ed6 (21.ab4?! de5 22.Be5 Be5 23.Qe5 Qd6 24.Qd6 cd6+-) 21...Bb2 22.Be6 (22.Qe7?! Qd6 23.Qd6 cd6 24.ab4 Ra4+=) 22...Ne6 23.Qe6 Kh8 24.de7+-) 20.cd5 Rf1 21.Rf1 Qd5 22.Qd5 Nd5 23.Be6?? (better is 23.b5+-) 23...Ne6–+ 24.Nf2 (24.ba5 Ra5 25.d4 Bf8–+) 24...ab4 25.ab4 Nb4 26.Rc1 c5 27.Bc3 Nc6 28.Ne4 (28.Rb1 Be5 29.Ng4 Bd4 30.Bd4 Ncd4 31.Rb6 h5 32.Nf6 Kg7–+) 28...Be5 29.Be5 Ne5 30.Rf1 (30.Rb1 Ra6–+) 30...Nd3 31.g3 Kg7 32.Rf6 (32.Rb1 Ra6 33.Nf2 Nf2 34.Kf2–+) 32...Ng5 33.Rd6 Ra1 34.Kg2 Ne1 35.Kf2 0–1. Satka,Martin – Mazurkiewicz,Antoni, Brandenburg Seniors op, 2003.

4.c4 c6 5.e3 (5.e4 Nf6=) 5...d5 (5...d6 6.d4=) 6.cd5 cd5 7.Nf3 Nd7 (7...f6 8.d4 e4 9.Nfd2+=) 8.Nc3 (8.Bb5 f6=) 8...Ne7 9.Qb3 Nb6 10.Rc1 (10.Na4 Na4 11.Qa4 Bd7=) 10...a6 (10...0-0 11.d4 ed4 12.Nd4 Bd4 13.ed4=) 11.Be2 (11.d4 e4 12.Nd2 0-0=) 11...0-0 (11...e4 12.Nd4=) 12.0-0 (12.d4 ed4 13.Nd4 Bd4 14.ed4 Nf5=) 12...d4 (12...e4 13.Ne1=) 13.Ne4+= Be6 14.Qc2 Rc8 (14...Bf5 15.d3=) 15.Qb1 (15.Nc5 Bd5+=) 15...Bf5 (15...Na4 16.Rc8 Nc8 17.Ba1=) 16.Rc8 Nec8 17.d3 Be4 (17...Na4 18.Nc5 Nb2 19.Qb2=) 18.de4 de3 19.fe3 Qe7 20.Qa1 Re8 21.Qa2 Nd6 22.Bd3 Rc8 23.Qb3 Nbc4=+ 24.Bc4 Nc4 25.Rc1 b5 26.Nd2 Qg5 27.Nc4= bc4 28.Qc3 Qg4 29.Qc2 Bh6 30.Re1 Qh4 31.g3 Qh5 32.Qf2 Qg5 33.Bc3=+ Rd8 34.h4 Qe7–/+ 35.Kg2 Rd3–+ 36.Bb2 c3 37.Bc1–/+ 0–1. Gross,Wilhelm – Wallrabenstein, BahnAG–DB, 1994.

4.c4 f5 5.e3 d6 6.d4 Nd7 7.Qb3 Qe7 8.Nc3 c6 9.de5 de5 10.Nf3 Nh6 11.c5 Nf7 12.e4 f4 (12...Nf6 13.Bd3=) 13.Bc4 0-0 14.h4 h6 15.0-0-0 (15.Rd1 a5+=) 15...Nf6 (better 15...a5!?=) 16.Ne5 Qe5 17.Nd5 cd5 18.Be5 dc4 19.Qc4 Re8 20.Bf6 Bf6 21.Rd6 Kg7 22.Rf6 (22.Rd2 Bg4+=) 22...Kf6 23.Qc3 Ne5 24.Rd1 Be6 25.g3 (25.Rd6 Rad8 26.Qd2 Rd6 27.cd6 Rc8 28.Kb1 g5=) 25...f3= 26.Rd3 Bg4 27.Rd6 Re6 (27...Kf7 28.Rd5 Nc6 29.b5+/-) 28.Qd2+= g5 29.Kc2 Rc8 30.Rd8 Rd8 31.Qd8 Re7 32.Qh8 Kg6 33.Qg8 Kf6 34.Qh8 Kg6 35.Qg8 (35.Qf8!? Re6 36.Qb8 gh4 37.gh4+/- (37.Qa7?? hg3 38.Qb7 g2-+; 37.Qb7?? hg3 38.fg3 f2-+)) 35...Kf6= 36.Qh8 ½-½. Zwirs,Nico (2385) - Schulze,Lara (2160), HSG Open, 2019. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 f5)

4.c4 Nh6 5.d4 ed4 6.Bd4 Bd4 7.Qd4 0-0 8.Nf3 d6 9.Nc3 Nf5 10.Qd2 a5 11.b5 Nd7 12.e4 Ng7 13.Rd1 Re8 14.Be2 b6 15.0-0 Bb7 16.Qh6 f6 17.Bd3 Nc5 e4 seems the pivot of the position 18.Rfe1 Re7 19.Bc2 Qf8 20.Re3 Rae8 21.Qh4 Qf7 22.Nd2 h5 23.f4?? (better is 23.Nd5 Re6 24.Qg3+/–) 23...Nf5!–+ 24.ef5 Re3 25.fg6 Qg7?? (better is 25...Qe7 26.Ndb1 Rc3 27.Nc3 Qe3 28.Kf1 Qc3 29.Qh5 Bg2 (29...Qc2?? 30.Qh7 Kf8 31.Qf7; 29...Qc4?! 30.Kg1 Re7 31.g7 Kg7 32.Qh7 Kf8 33.Qh8 Qg8 34.Qf6 Ke8 35.Bg6 Kd7 36.Bf5 Kd8 37.g3–+) 30.Kg2 Qc2 31.Kh1 Re7 32.Qd5 Kg7–+) 26.Nd5–/+ Bd5 27.cd5 Rc3 28.Bf5 Qe7 29.Nf3 Kg7 30.Qh5 Rh8 31.Qg4 Qe3 32.Kf1 Rc1–/+ 33.Re1?? Re1 34.Ne1–+ Rh2 (34...Rh2 35.Qh3 Rh3 36.gh3 Qf4 37.Kg1 Qf5–+) 0–1. Weidt,Frank (2025) – Hager,Eberhard (1715), Augsburg Afro op, 1997. (=1.a3 e5 2.c4 g6 3.b4 Bg7 4.Bb2)

4.c4 Nh6 5.Nf3 d6 6.d3 Bg4 7.Nbd2 Nd7 8.h3 Bf3 9.Nf3 Qe7 10.e4 0-0 11.g4 f5 12.g5 Nf7 13.Rg1 Nd8 14.h4 Ne6 15.ef5 Rf5 16.Bh3 Rf4 17.Bc1 (better is 17.Qe2!?+=) 17...e4–+ 18.Be6 Qe6 19.Bf4 ef3 20.Kd2 Ba1 21.Qa1 Qe2 22.Kc3 a5 23.Qb2 ab4 24.ab4 Qe6 25.Kb3 (25.Ra1 Re8+=) 25...Qf5 (25...b5 26.Qc3–+) 26.Qd2 Rf8 27.Bg3 Re8 28.Rd1 Re2 29.Qc3 b6 (29...b5!? 30.h5 gh5 31.Ra1–+) 30.Qd4 Nf8 31.Qd5 Kh8 (31...Ne6!?+=) 32.Ra1 Ne6 33.Ra8 Kg7 34.Kc3 Qf7 (better is 34...h6+=) 35.Qc6?? (better is 35.Ra7 h6 36.Bd6 hg5 37.hg5+-) 35...Rc2!!–+ 36.Kc2 Nd4 37.Kc3 Nc6 (37...Nc6 38.b5 Ne7–+) 0–1. Micheli,Carlo (2310) – Eynard,Valdo (1870), Ticino op, 1990. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2)

4.e3 b6 5.f4+= d6 6.c4 (6.Nf3 a5+=) 6...Nd7 7.Be2 (7.Nf3 Bb7=) 7...Ne7 (7...a5 8.Nf3+=) 8.Bf3+= c6 9.Ne2 Ba6 10.b5 cb5 11.Nbc3 (11.cb5 Bb5 12.Ba8 Qa8+=) 11...Nc5 (11...bc4!? 12.Ba8 Qa8=+) 12.d4+= (worse 12.Ba8 Nd3 13.Kf1 Nb2–/+) 12...e4 13.Ne4 (worse 13.dc5 ef3 14.gf3 dc5=+) 13...Ne4 14.Be4 Rc8 15.cb5 (15.Rc1 0-0= (worse 15...Rc4 16.Rc4 d5 17.Rc3 de4 18.Qc2+-)) 15...Bb5 16.Nc3 Bc4 17.Qa4 Qd7 18.Qd7 Kd7 19.Kf2 f5 20.Bf3 Ng8 21.g4 Nf6 22.gf5 gf5 23.Rhg1 Rhg8 24.Rg5 Ng4 (24...Be6!?=) 25.Bg4+- fg4 26.Rg4 Bf6 27.Rag1 Rge8 28.Kf3 Bf7 29.R4g3 h5 30.h3 h4 31.R3g2 Re7 32.f5 a6 33.Rd2 (33.Kf4 d5+-) 33...Rc4 (33...d5 34.Rdg2+=) 34.Rg4 d5 35.Ke2 b5 36.Kd3 Rc8 (36...Re8 37.Rdg2+=) 37.Rdg2 Rce8 38.Bc1 Kd6 39.Rg6! Bg6 40.Rg6 (40.fg6?! Rc8+=) 40...Rf8 41.e4 de4 42.Ne4 Re4 43.Ke4 Re8 44.Kd3 Ke7 45.Rh6 Rd8 46.Be3 Rd7 47.Ke4 Rc7 (47...Kf7 48.Rh7 Ke8 49.Rd7 Kd7 50.Bd2+-) 48.d5 (48.Rh7 Kd8 49.Rc7 Kc7+-) 48...Rc4 49.Kf3 Rc3 50.d6! (50.d6 Kf7 51.Rh7 Kg8 52.Rb7+-) 1–0. Marekt – Booty_bones, gameknot.com, 2019.

4.e3 Nc6 5.Be2 (5.Nf3 d6=) 5...d5 6.b5 Nce7 7.Nf3 Qd6 (7...f6 8.0-0=) 8.c4 f6 (8...dc4 9.Bc4 Be6 10.Be6 Qe6 11.Qa4+=) 9.Nc3+= c6 (9...Be6 10.cd5 Nd5 11.d4+=) 10.a4 (10.d4 Bg4+=) 10...Bd7 (10...e4 11.Nd4+=) 11.Ba3 Qe6 12.bc6 (12.Qb3 Rd8+=) 12...Bc6 13.cd5 (13.Nb5 Bb5 14.cb5 Nf5+=) 13...Bd5 (13...Nd5 14.Nb5 Kd8 15.Nd6+=) 14.Nb5 (14...Kd8 15.d4+=; 14.Nd5 Qd5 15.Rc1 e4 16.Bb5 Nc6+/–) 1–0. Apocalypse – moover, internet, 2005.

4.e3 d5 5.c4 Bf5 6.Nf3 Nc6 7.Nc3 (7.cd5 Qd5 8.Nc3 Qd7+=) 7...Nge7 (better is 7...dc4!? 8.e4 Be6=+) 8.cd5 Nd5 9.Nd5 (better is 9.b5 Nce7 10.Nd5 Qd5 11.d4+=) 9...0-0?? (better is 9...Qd5 10.b5 Na5=) 10.Nc3 a6 (10...e4 11.b5 Ne7 12.Nd4 Bd4 13.ed4 Qd4 14.Qc2+-) 11.Be2 e4 12.Ng1 b5 13.Bg4?? Bg4+= 14.Nge2?? Re8 15.h3 Bf5 16.Rb1 Ne5 17.0-0 Nc4 18.Qc2 Qg5 19.g4? Bd7?? 20.Ng3? Nb2 21.Rb2 Bc6 22.Rbb1 Rac8 23.Nce4= Be4 24.Ne4 Qh4 25.Kg2 Re6 26.Ng3 Be5+= 27.f4 Bd6 28.Rf3 c5 29.d3 Ree8 30.Rc1 Rc7 31.Qb2+/– Qh6? 32.Qd2 Be7+/– 33.Rc2 Rd8 34.e4 c4 35.d4 Qg7 36.e5 Rcd7 37.Ne2 Ra8 38.d5 Bd8 39.d6 a5 40.Nd4 ab4 41.ab4 Bb6? 42.Nb5 Rb8 43.Rc4 Qf8 44.Nc7 Rc8 45.Rc6 Bc7 46.Rd3 Bb8+/– 47.b5 Qe8 48.Qc2 Rc6? 49.bc6+- Rd8 50.c7 Bc7 51.dc7 Rd3?? 52.Qd3 Qc6 53.Kg3 Qc7 54.Kh4 Qe7 55.Kg3 Qe8?? 56.Qd6 Qf8 57.Qf8 Kf8 58.Kh4 h6 59.f5 gf5 60.gf5 Kg7 61.Kh5 Kh7 62.e6 fe6 63.fe6 Kg7 64.h4 Kf6 65.Kh6 Ke6 66.Kg6 Ke7 67.Kg7 Ke6 68.h5 Ke7 69.h6 Ke6 70.h7 Ke7 71.h8Q Ke6 72.Qd8 Ke5 73.Kg6 Ke6 74.Qa5 Ke7 75.Qd5 Ke8 76.Kf6 (76...Kf8 77.Qf7; 76.Qf7 Kd8 77.Kf6 Kc8 78.Qa7 Kd8 79.Ke6 Kc8 80.Kd6 Kd8 81.Qd7) 1–0. mgriffin (1690) – jhforry (1620), net–chess.com, 2001.

4.e3 d5 5.Nf3 Nd7 6.c4 Ne7 7.cd5 Nd5 8.Bc4 c6 (8...N5b6 9.Be2=) 9.Qb3+= N7b6 10.Be2 (10.Ne5 Qg5 11.Nc6 Qg2 12.Rf1 Bb2 13.Qb2–+) 10...Qd6 11.Nc3 Nc3 12.Bc3 (12.dc3 Bf5=) 12...Be6 13.Qc2 f5 14.0-0 0-0 15.d3 Nd5 16.Bb2 a5 17.ba5 Ra5 18.d4 e4 19.Nd2 Qe7 20.Nb3 Raa8 21.Nc5 Rfe8 (21...Bf7 22.Rab1=) 22.Ne6 Qe6 23.Bc4 Bf8 24.Qb3 (24.a4 Ra7=) 24...Red8 (24...b5!? 25.Be2 f4+=) 25.a4= (25.Qb7? Rdb8 26.Qb8 Rb8–+) 25...Rd7 26.Ba3 Bh6 27.g3 g5 28.Bd5 (28.Rfb1 f4+=) 28...cd5 (worse is 28...Rd5 29.Qb7 Ra4 30.Bc5 Ra1 31.Ra1+/–; 28...Qd5?! 29.Qc2+=) 29.Bc5 f4 30.Qb1 (30.Kh1 f3+=) 30...Ra6 31.Qd1 (31.Qb5 f3 32.Rfb1 Qh3+=) 31...fe3 (31...Qh3 32.Kh1 f3–+) 32.fe3= g4 33.Qe2 Rf7 34.a5 Qg6 0–1. Krivoshapko,Alexander – Toder,Alexander, Omsk Russia, Summer Open, 2013.

4.e3 d5 5.Nf3 Bg4 6.c4 (6.Be2 Nd7 7.0-0=) 6...Nf6 (better is 6...Bf3!? 7.Qf3 e4 8.Qe4 de4 9.Bg7 Nf6 10.Bh8 a5=+) 7.Be5+= Nc6 8.Bf6 Qf6 9.d4 dc4 (9...Qe7 10.Kd2 0-0-0 11.Nc3 dc4 12.Kc1 Bd4 13.ed4 Nd4 14.Qd4 Rd4 15.Nd4–+) 10.Bc4 0-0 11.Nbd2 Rad8 12.0-0 a6 (12...Rfe8 13.b5 Na5 14.Be2+/–) 13.Qc2 Bf5 (13...Rfe8 14.Ne4 Qf5 15.Nfg5+-) 14.Bd3 Ne7 (better is 14...Bd3!? 15.Qd3 Rfe8+/–) 15.Bf5+- Qf5 (15...Nf5 16.Qc7 b5 17.Ne4+-) 16.Qc7 Qd7 (16...Rd7 17.Qg3+-) 17.Rac1 Nd5 18.Qd7 Rd7 19.Rc2 f5 20.Rfc1 Re8 21.Nb3 (21.Nc4 Rdd8+-) 21...b6 22.h3 (22.Nbd2 Kf8+-) 22...Rdd8 (22...Kf7 23.Ng5 Kg8 24.Nd2+-) 23.g3 (23.Nbd2 Kf8+-) 23...h6 (23...Kf8 24.Rc6+-) 24.Nbd2 Kf7 25.Nc4. pierre – anrolga, internet, 2006.

4.e3 d5 5.f4 f6 6.Nf3 Bg4 (6...ef4 7.ef4 Qd6 8.Nc3=) 7.h3 (7.Be2 Ne7=) 7...Bf3 8.Qf3 Ne7 9.g4 (9.e4 c6=) 9...e4 10.Qg3 Qd6 (10...a5 11.b5=) 11.c4 (11.Nc3 Nd7=) 11...dc4 12.Bc4 Nd7 (better is 12...Qc6!? 13.Bb3 a5=) 13.Nc3+/– Nb6 (13...Qc6 14.Bb5 Qe6 15.f5+/–) 14.Ne4 Qc6 15.Bd3 0-0-0 (15...Rd8 16.Rc1 Qe6 17.Bd4 Rd4 18.ed4+/–) 16.Rc1 Qd5 17.Nf2 Qa2 (17...Rhe8 18.f5 Rd7 19.Qf4+/–) 18.Bc3 (18.Bd4 Kb8+/–) 18...Ned5 (18...Qa3 19.0-0 Kb8 20.f5+=) 19.f5 (19.Bd4 Kb8+/–) 19...Na4 (better is 19...Nc3!? 20.Rc3 Nd5+=) 20.Bd4 (20.Ra1 Qb3 21.Bd4 Ne7+-) 20...Qa3 21.0-0 (21.Ra1!? Qb4 22.fg6 Rhe8+-) 21...Qb4+/– 22.Rc4 Qa5 23.Ra1 (23…b5 24.Rc5 Qd2 25.Rb5+/–) 1–0. Bahnsen,Benjamin – Bracker,Dustin, Schleswig Holstein–ch U20 VR, 1997.

4.e3 f5 5.c4 d6 6.d3 Nf6 7.Nd2 0-0 8.Be2 Nc6 9.Ngf3 h6 10.0-0 Be6 11.Re1 Ne7 12.Nf1 g5 Black intends f4 13.Ng3 f4 14.Nf1 c6 15.ef4 gf4 16.Qd2 Ng6 17.Qc2 Nh7 18.N1d2 Ng5 19.d4 Bf5 20.Bd3 e4 21.Ne4 (21.Ne4 Nf3 Double attack; 21.Be4 Nf3 Double attack) 21...Nf3-/+ 22.gf3 Nh4 23.Qd1 Be4 24.Be4 (24.fe4?? Qg5 25.Kf1 f3-+; 24.Re4? d5 25.Re5 Be5 26.de5 Qg5 27.Kf1 Qg2 28.Ke2 A) 28...Nf3?! 29.Qh1 Qh1 30.Rh1 Ne5 31.Rg1 (31.Be5? Rfe8-+) 31...Kf7 32.Be5=; B) 28...Qf3 29.Ke1 Ng2 30.Kd2 Qf2 31.Kc3 f3 32.cd5 cd5-+) 24...Qg5 25.Kf1 Rfe8 26.Ke2?? (better 26.Re2-/+) 26...d5-+ 27.cd5 cd5 28.Qb3 (28.Rg1 Qh5 29.Kd3 Rac8-+) 28...Kh8 29.Rg1 (29.Kd1 de4 30.fe4-+) 29...Qh5 30.Qd5 (30.Kd1 de4 31.d5-+) 30…Qd5 (30...Qd5 31.Rg3 fg3 32.h3 Re4 33.fe4 Qe4 34.Kd1 Qd3 35.Kc1 Rc8 36.Bc3 Rc3 37.Kb2 Qc2) 0-1. azer3136 (2285) - Naitero (2240), Rated Blitz game, lichess.org, 2016.

4.e4 d6 5.Bc4 c6 (5...Qe7 A) 6.Nf3 Nf6 (6...Nd7 7.Nc3 Nb6 8.Bb3 Nf6 9.0-0 0-0 10.Qe2 Bd7 11.a4 a5; 6...Be6 7.Be6 fe6 8.Nc3 Nf6 9.0-0 Nc6 10.Qe2 a6 11.Qe3 0-0) 7.Nc3 0-0 8.0-0 Nbd7 9.Qe2 Nb6 10.Bb3 Bd7 11.a4 a5; B) 6.Qe2 Nf6 (6...Nc6 7.Nf3 Nf6 8.Nc3 Bg4 9.Nd5 Nd5 10.Bd5 0-0 11.0-0 a6; 6...Nd7 7.Nc3 Nb6 8.Bb5 c6 9.Bd3 Nf6 10.Nf3 Nh5 11.0-0 Nf4; 6...Be6 7.Nf3 Nf6 8.Be6 fe6 9.0-0 0-0 10.Nc3 Nc6 11.Qd3 Nh5) 7.Nc3 a5 8.b5 Nbd7 9.Nf3 0-0 10.0-0 Nc5 11.h3 Bd7; C) 6.h3 Nf6 (6...Nc6 7.Nf3 Nf6 8.Nc3 0-0 9.0-0 Nd4 10.Re1 Be6 11.Nd5 Nd5; 6...Be6 7.Qe2 Nf6 8.Nf3 Nh5 9.Be6 fe6 10.0-0 Nf4 11.Qe3 0-0; 6...Nd7 7.Nc3 Ngf6 8.Nf3 0-0 9.0-0 Nb6 10.Bb3 Be6 11.Be6 fe6; 6...Bd7 7.Nf3 Nf6 8.Nc3 Nc6 9.0-0 0-0 10.Re1 Nd4 11.Nd4 ed4) 7.Nc3 Be6 8.Qe2 Nh5 9.Be6 fe6 10.Qc4 Nc6 11.Nge2 0-0; D) 6.Nc3 Nf6 7.Nf3 0-0 8.0-0 Nbd7 9.Bb3 Nb6 10.Qe2 Bd7 11.a4 a5; 5...Nf6 6.Nc3 Qe7 (6...0-0 7.Nf3 Nc6 8.0-0 Nd4 9.Nd4 ed4 10.Nb5 Ne4 11.Bd4 c6; 6...Nbd7 7.Nf3 0-0 8.Bb3 Nb8 9.0-0 Nc6 10.Re1 Bd7 11.Nd5 Nd5; 6...Nc6 7.Nf3 0-0 8.0-0 Nd4 9.h3 Be6 10.Be6 Ne6 11.Re1 a5; 6...Be6 7.Be6 fe6 8.Nge2 0-0 9.0-0 Nc6 10.d3 d5 11.ed5 ed5) 7.Nf3 0-0 8.0-0 Nbd7 9.Bb3 Nb6 10.Qe2 Nh5 11.Qe3 Bd7; 5...Nc6 A) 6.Nf3 Nf6 (6...Bd7 7.0-0 Nf6 8.Re1 0-0 9.h3 a6 10.Nc3 a5 11.b5 Nd4; 6...a6 7.Nc3 Nf6 8.Qe2 0-0 9.Nd5 Nd5 10.Bd5 Be6 11.0-0 Qe7) 7.Nc3 0-0 8.0-0 Nd4 9.h3 Be6 10.Bd3 d5 11.Ng5 Qd7; B) 6.Ne2 Qg5 (6...Nf6 7.Nbc3 0-0 8.0-0 Bd7 9.d3 Qe7 10.Qd2 Rfe8 11.Nd5 Nd5; 6...Bd7 7.Nbc3 Nf6 8.d3 0-0 9.0-0 Nd4 10.Nd4 ed4 11.Ne2 b5; 6...a6 7.0-0 Nf6 8.Nbc3 0-0 9.d3 Be6 10.Be6 fe6 11.Qd2 d5; 6...Qh4 7.0-0 Nf6 8.Nbc3 Ne4 9.Nd5 Qd8 10.d3 Nf6 11.Nf6 Bf6) 7.0-0 Nf6 8.Nbc3 0-0 9.f3 a6 10.Nd5 Be6 11.Qe1 Rae8; C) 6.h3 Nf6 7.Nc3 Ne4 8.Ne4 d5 9.Bd3 de4 10.Be4 Bf5 11.Bf5 gf5; D) 6.Nc3 Nf6 (6...Nd4 7.Nge2 Nf6 8.0-0 0-0 9.f3 Be6 10.Nd5 Nd5 11.ed5 Bd7; 6...a5 7.b5 Nd4 8.Nf3 Nf6 9.h3 0-0 10.0-0 Be6 11.Be6 fe6; 6...a6 7.Nf3 Nf6 8.0-0 0-0 9.h3 b5 10.Bb3 Nd4 11.Nd4 ed4; 6...Bd7 7.Nf3 Nf6 8.0-0 0-0 9.h3 a5 10.b5 Nd4 11.Re1 Re8) 7.Nf3 0-0 8.0-0 Nd4 9.h3 Be6 10.d3 Re8 11.Be6 Ne6; 5...a6 A) 6.Nf3 Nc6 (6...Nf6 7.Nc3 Nc6 8.0-0 0-0 9.Re1 Bd7 10.Nd5 b5 11.Bd3 Nd5; 6...Ne7 7.0-0 0-0 8.Nc3 Nbc6 9.Re1 Be6 10.Nd5 Nd4 11.a4 Nd5) 7.Nc3 Nf6 8.0-0 0-0 9.Re1 Bd7 10.Nd5 b5 11.Bd3 Nd5; B) 6.Nc3 Nf6 (6...Nc6 7.Nf3 Nf6 8.0-0 0-0 9.Re1 Bd7 10.Nd5 Nd5 11.Bd5 Qf6; 6...Bd7 7.Nf3 Nf6 8.0-0 0-0 9.Qe2 Nc6 10.Nd5 Nd5 11.Bd5 Qf6) 7.Nf3 0-0 8.0-0 Nc6 9.Re1 Bd7 10.Nd5 b5 11.Bd3 Nd5; C) 6.Qe2 Nf6 (6...Nc6 7.Nf3 Nf6 8.Nc3 0-0 9.Qd3 b5 10.Ba2 a5 11.Qb5 Bd7; 6...Bd7 7.Nf3 Nc6 8.Nc3 Nf6 9.0-0 0-0 10.Nd5 Nd5 11.Bd5 Qf6; 6...Ne7 7.Nf3 Nbc6 8.0-0 0-0 9.Nc3 Bg4 10.Qd3 Qd7 11.Ne2 Be6) 7.Nf3 Nc6 8.0-0 0-0 9.h3 Bd7 10.Nc3 Nd4 11.Qd3 b5; D) 6.Bb3 Nc6 (6...Nf6 7.Nc3 Nc6 8.Nf3 a5 9.0-0 0-0 10.h3 ab4 11.ab4 Ra1; 6...Qe7 7.Nc3 Nf6 8.Nf3 Nc6 9.h3 0-0 10.0-0 Bd7 11.Nd5 Nd5) 7.Nf3 Nf6 8.Nc3 a5 9.0-0 0-0 10.Qe2 Bg4 11.Nb5 Qd7; E) 6.h3 Nc6 (6...Nf6 7.Nc3 b5 8.Ba2 0-0 9.Nf3 Nc6 10.0-0 Nd4 11.d3 Bb7; 6...Qe7 7.Nf3 Nf6 8.Nc3 Be6 9.Qe2 0-0 10.0-0 Bc4 11.Qc4 Nc6; 6...Bd7 7.Nf3 Nf6 8.Nc3 Nc6 9.0-0 0-0 10.d3 b5 11.Bb3 Nd4; 6...Ne7 7.Nc3 Nbc6 8.Nf3 Be6 9.Nd5 0-0 10.0-0 Nd4 11.Re1 c6) 7.Nf3 Nf6 8.Nc3 0-0 9.0-0 b5 10.Ba2 Nd4 11.d3 Bb7; 5...Bd7 A) 6.Nf3 Nf6 (6...Nc6 7.0-0 Nf6 8.Nc3 0-0 9.h3 a5 10.b5 Nd4 11.Re1 a4) 7.Nc3 Nc6 8.0-0 0-0 9.Re1 a5 10.b5 Nd4 11.h3 a4; B) 6.Nc3 Nc6 (6...Nf6 7.b5 0-0 8.Nf3 c6 9.a4 a6 10.Qe2 ab5 11.ab5 Ra1) 7.Nf3 Nf6 8.0-0 0-0 9.h3 a5 10.b5 Nd4 11.Re1 a4; C) 6.h3 Nf6 (6...Nc6 7.Nf3 Nf6 8.Nc3 0-0 9.0-0 a5 10.b5 Nd4 11.Re1 a4; 6...Qe7 7.Nf3 Nf6 8.Nc3 Nc6 9.0-0 0-0 10.Nd5 Nd5 11.Bd5 a5; 6...b5 7.Bd3 Nf6 8.Nc3 a6 9.Nf3 Nc6 10.0-0 0-0 11.Qe1 Nh5) 7.Nc3 Nc6 8.Nf3 0-0 9.0-0 a5 10.b5 Nd4 11.Re1 a4; D) 6.Qe2 Nc6 (6...Nf6 7.Nf3 Nc6 8.0-0 0-0 9.h3 Nh5 10.Nc3 Nf4 11.Qe3 Nd4; 6...a6 7.Nf3 Nc6 8.0-0 Nf6 9.Nc3 0-0 10.Nd5 Nd5 11.Bd5 Qf6; 6...Ne7 7.Nf3 0-0 8.Nc3 Nbc6 9.0-0 Nd4 10.Qd3 Nec6 11.Nd5 b5) 7.Nf3 Nf6 8.Nc3 0-0 9.0-0 a5 10.b5 Nd4 11.Qd3 Ne6) 6.Nf3 (6.Nc3 Nd7 (6...Ne7 7.Nf3 d5 8.Bd3 f5 9.ed5 e4 10.d6 ed3 11.de7 Qe7; 6...Nf6 7.Nf3 Nbd7 8.0-0 0-0 9.Bb3 a5 10.Qe2 b5 11.h3 Bb7) 7.Nf3 Ngf6 8.Bb3 Nf8 9.d4 ed4 10.Qd4 Ne6 11.Be6 Be6; 6.Bb3 Nf6 7.Nc3 d5 8.Nf3 d4 9.Na4 Nbd7 10.0-0 0-0 11.Qe2 b5) 6...Nf6 (6...Ne7 7.0-0 0-0 8.Nc3 d5 9.Bb3 d4 10.Ne2 Na6 11.Nc1 c5; 6...Nd7 7.Nc3 Ngf6 8.0-0 0-0 9.h3 Nb6 10.Bb3 Re8 11.Qe2 d5) 7.0-0 (7.Nc3 0-0 8.0-0 d5 9.Bd3 Nbd7 10.h3 Re8 11.Re1 d4) 7...Ne4 8.d3 (8.d4 d5 9.Bd3 ed4 10.Bd4 (10.Nbd2 0-0 11.Ne4 de4) 10...0-0+= 11.Nbd2 Bf5; 8.Re1 d5 9.Bd3 Nd7 10.Be4 de4 11.Re4 0-0) 8...Nf6–/+ 9.Ng5 (9.Nc3 0-0 10.Re1 Nbd7 11.Bb3 Re8) 9...0-0 10.f4 (10.Bb3 Nd5 11.h4 Nd7) 10...ef4 (10...d5 11.Bb3 Nh5) 11.Nf7? (11.Bb3 Nd5 12.Bg7 Kg7 (worse is 12...Qg5 13.Bf8 Ne3 14.Qf3 Kf8 15.Rf2+=) 13.Bd5 Qg5–/+; 11.Qc1 d5) 11...Rf7 (better is 11...Qb6!? 12.Kh1 d5–+ (12...Rf7?! 13.Bf7 Kf7 14.Rf4–/+)) 12.Bf7 Kf7 13.Rf4 Kg8 14.Bf6 Bf6 15.Ra2 (15.c3 Be5 16.Rf2 Qh4–+) 15...Be6 16.c4 Nd7 17.Qe1 Qe7 18.Re2 Ne5 (better is 18...Be5!? 19.Rff2 Re8–+) 19.d4–/+ Nd3 20.Re6 Ne1 21.Re7 Be7 22.Re4 Bh4?? (better is 22...Bf6 23.Re1 Bd4 24.Kh1 Rf8–+) 23.Rh4= Re8 24.Nc3 Nc2 25.Ne4 Re6 26.d5 cd5 27.cd5 Re5 28.Nd6 Na3 29.Ne4 Rf5 (better is 29...Nc2!?+=) 30.d6+/– Kg7? (better is 30...Rf8+/–) 31.d7+- Rd5 32.Nc5 (32.Rh7 Kf8 33.Nc5 Nc2 34.Rh8 Kf7+-) 32...Nc2?? (better is 32...Kg8 33.Rh3 Nc2+-) 33.Ne6 Kf6 34.d8Q Rd8 35.Nd8 Ke7 (35...b6 36.Nc6+-) 36.Nb7 1–0. Fouard,Daryl R – Crumpler,Ken (1735), Stillwater USA NATO op, 2011.

4.e4 d6 5.h3 f5 6.Bc4 (6.ef5 Bf5 7.Nf3 Ne7=) 6...Nf6 (better 6...fe4!? 7.d3 ed3 8.cd3 d5-/+) 7.ef5= Bf5 8.d3 c6 9.Bb3 Nbd7?? (better 9...Qe7=) 10.g4+- Qb6 (10...Qe7 11.gf5 gf5 12.Ne2+-) 11.gf5 gf5 12.c4 (12.Nf3 Bf8+-) 12...0-0-0 13.Nd2 Rhg8? (13...Rhe8+-) 14.Qf3 (14.c5!? dc5 15.Bg8 Ng8+-) 14...Qc7 15.Ne2 (15.Qf5 Rdf8+-) 15...e4 (15...f4 16.d4+-) 16.de4 (16.Qf5 Rdf8 17.d4 Re8+-) 16...fe4 17.Ne4 Rdf8 18.Bd4 (18.Nf6 Bf6 19.Bf6 Nf6+-) 18...Ne4 19.Qe4 Re8 20.Qd3 Ne5 (20...Bd4 21.Qd4 Kb8 22.Bc2+-) 21.Qf5 Qd7 (21...Nd7 22.Rd1 Bd4 23.Rd4+-) 22.Qd7 Kd7 23.Be5 (23.0-0-0 Nf3 24.Be3 a6+-) 23...Re5 24.Rd1 Rge8 25.Rd2 R5e7 26.Rg1?? (better 26.Kd1+-) 26...Bc3+= 27.Bd1 Bd2? (better 27...Rf8+=) 28.Kd2+- Rf8 29.Rg2 Rf3 30.Nc3 Rf4 31.Bg4 Kc7 32.Be2 Rd4 33.Kc2 Rh4 34.Rg3 Rf7 35.f3 Rhf4 36.Rg4 h5 37.Rg5 R4f5 38.Rg3 h4 (38...a6 39.Rg8+-) 39.Rg4 Rf4 40.Kd2 Rg4 41.fg4 The passed pawn on g4 will become decisive later (41.hg4?! h3 42.Ne4 h2+=) 41...Rf2 42.Ne4 Rh2 43.Ng5 Kd7 44.Ke3 Ke7 45.Bf1 Ra2 46.Nf3 Ra3 47.Bd3 Rb3 48.b5 cb5 49.cb5 a5 50.Nh4 (50.ba6!? ba6 51.Nh4 a5+-) 50...a4 51.Nf5 Kd7 (better 51...Kf6 52.Nd4 Rb2+/-) 52.g5?? (better 52.Nd4 Rc3 53.Kd2+-) 52...a3= 53.Nd4 Rc3 54.g6 Ke8 55.Kd2? (55.Nc2 a2 56.Na1-+) 55...a2-+ 56.g7 (56.Kc3 a1Q 57.Kc4 Qa2 58.Kc3 Qa3 59.Kd2 Qb2 60.Ke3 Qc1 61.Ke2-+) 56...Kf7 57.Bc4? (57.Kc3 a1Q 58.Kc4 Qa2 59.Kc3 Qa3 60.Kd2 Qb4 61.Ke3-+) 57…Rc4 (57...Rc4 58.Nb3 Rb4-+) 0-1. petrobbo (2095) - ed54 (2130), ChessWorld.net, 2013.

4.e4 Ne7 5.c4 (5.Nf3 d5=) 5...b6 (5...d6 6.Nc3=) 6.Nc3 (6.Nf3 Bb7+=) 6...0-0= 7.Nf3 d6 (7...f5 8.c5=) 8.Be2 Be6 (8...f5 9.d4=) 9.Qc2 Nbc6 10.Nd5 (10.b5 Na5=) 10...Rc8 (10...f5 11.d3=) 11.0-0+= Bg4 (11...f5 12.Ng5 Bd7 13.f4+=) 12.d3 (12.b5 Nd5 13.cd5 Bf3 14.Bf3 Nd4 15.Bd4 ed4+=) 12...Nd5 13.cd5 (13.ed5 Ne7+=) 13...Ne7 14.b5 (14.Nd4 Be2 15.Ne2 c6=) 14...Qd7 15.a4 (15.Qc4 f5+=) 15...Ra8 (15...f5 16.h3 Bh5 17.Rfc1+=) 16.Rfc1 (16.h3 Bf3 17.Bf3 f5+/–) 16...Rfc8 (16...Bh6 17.Re1+=) 17.Qb3 (17.d4 Bf3 18.Bf3 ed4+/–) 17...a6 18.h3 (18.ba6 Bh6 19.Rc2 Bf3 20.Bf3 Ra6+/–) 18...Bf3 19.Bf3 h5 20.Bc3 Bh6 21.Rc2 Qd8 22.Be2 a5 23.Bd2 Bd2 24.Rd2 Kg7 25.Qd1 Ng8 26.Rc2+/– Nh6 27.Rac1 Ra7 28.Qd2 Qe7 29.Qe3 Kh7 30.Rc6 Qd8 31.f4 f6 32.f5 gf5+/– 33.Bh5 f4 34.Qf2 Qg8 35.Bf3 Rb7 36.Kh1 Qg7 37.Qh4 Qg5+/– 38.Qf2 Qg8 39.Qh4 Qg5 40.Qg5 fg5 41.Rd6! cd6 42.Rc8 Nf7 43.Bh5 Kg7 44.Rc6 Nd8 45.Rd6 Rb8 46.Bg4 Nf7 47.Rd7 Kf6 48.Rc7 Nd8 49.Kg1 Nb7 50.Rc6 Ke7 51.Rb6 Kd8 52.Rc6 Rc8 53.Bc8 (53...f3 54.Bb7 fg2 55.Rc8 Ke7 56.Rc7 Kd6 57.Rc6 Ke7 58.d6 Kf6 59.d7 Kg7 60.d8Q g4 61.Qd7 Kf8 62.Rc8#) 1–0. Hagstrom,Ake – Ivarsson,Evert, Hallstahammar op, 2003.

4.e4 Nf6 5.c4 0-0 6.Nf3 (6.Nc3 a5=) 6...d6 (6...Ne4 7.Qc2 Ng5 8.Ng5 Qg5 9.h4–/+) 7.h3 (better is 7.Nc3!?=) 7...Ne4–/+ 8.Nc3 (8.Be2 a5–/+) 8...Nc3 9.Bc3 Re8 10.Be2 c6 (10...e4 11.Nd4–+) 11.0-0–/+ Be6 12.d4 (12.Re1 Nd7–/+) 12...ed4 (12...e4!? 13.Nd2 d5–/+) 13.Bd4=+ Bd4 14.Nd4 Nd7 15.Ne6 Re6 16.Bg4 Re7 (16...f5!? 17.Be2 Qg5–/+) 17.Qd6= Nb6 (17...Ne5 18.Qd8 Rd8 19.Be2=) 18.Qd8 (18.c5!? Nc4 19.Qg3=) 18...Rd8= 19.Rad1? (better is 19.c5!? Nc4 20.Rfe1 Re1 21.Re1 Na3 22.Re7=+) 19...Rd1–/+ 20.Rd1 Nc4 21.Rd3 h5 22.Bc8 (22.Bf3 Re1 23.Kh2 Ne5 24.Rd8 Kg7–/+) 22...b5 (better is 22...Rc7 23.Bb7 Rb7–+) 23.Rd7 Rd7 (24.Bd7 Na3 25.Bc6 Nc2 26.Bb5 Nb4–/+) 0–1. thedesertfox (1920) – dovlov (1830), net–chess.com, 2004.

4.e4 Nh6 5.h3 (5.Nf3 d5+=) 5...0-0 6.Nf3 (6.Nc3 d6=) 6...d6 (6...d5 7.ed5 e4 8.Bg7 Kg7 9.Ng1=) 7.Bc4 c6 8.0-0 (8.Bb3 d5 9.Qe2 Re8=) 8...b5 (better is 8...d5 9.ed5 cd5=) 9.Nc3?? (better is 9.Bb3=) 9...bc4–+ 10.Qe2 Be6 11.Rac1 Na6 12.d3 Bf6 13.Rfd1 cd3 14.cd3 Bb3 15.Re1 Be6?? 16.Nh2?? Bg5 17.Rb1 f5 18.Qf3 f4 19.Rbc1 Nf7 20.Ng4 Bg4 21.Qg4 Nh6 22.Qe6 Nf7?? 23.Na4?? Re8 24.Qc4 Nb8 25.Rcd1 d5 26.ed5 cd5 27.Qc5 Be7 28.Qc3 Bd6 29.Nc5 Bc5 30.Qc5 Na6 31.Qc6 Nc7 32.Rc1 Re7 33.b5 Ne6 34.f3? Qb6 35.Kh1 Qc6 36.Rc6 Ned8 37.Rc5 d4 38.Bd4 Nb7 39.Rc6 Rd7 40.Be5 Ne5 41.Re5 Rd3 42.Re7 Nd8?? 43.a4?? Nc6–+ 44.bc6 Rd1 45.Kh2 a5 46.c7 Rc8 47.h4 Rc1 48.Re4 R8c7 49.Rf4 R7c4 50.Rf6 Rh4 51.Kg3 Rcc4 52.Ra6 Ra4 53.Ra7 Rhd4 54.Re7 h5 55.Ra7 g5 56.Ra6 h4 57.Kh3 Rd1 58.Rg6 Kf7 59.Rg5 Rh1# 0–1. pillsbury (1935) – epprecht (1980), net–chess.com, 2007.

4.Nf3 a5 5.Ne5 (5.e4 d6 6.Nc3 Nf6 7.Bc4 0-0 8.b5=; 5.Be5 Be5 6.Ne5 ab4 7.e3 Qe7 8.Nf3=) 5...d6 6.Nc4 Bb2 7.Nb2 ab4 8.e3=.

4.Nf3 e4?? 5.Bg7+- ef3 6.gf3 (6.ef3 Qe7 7.Be2 Nf6 8.Bh8 Kf8+-) 6...f6 7.Bh8 Kf7 8.e4 Ne7 9.Bc4 d5 10.ed5 Nd5 11.Nc3 Be6 (11...c6 12.Qe2 Qh8 13.Nd5 (< 13.Bd5 cd5 14.Nd5 Nc6+-) 13...cd5 14.Bd5 Kf8 15.0-0-0+-) 12.Bd5 Bd5 13.Bf6 (better is 13.Qe2!? c6 14.Nd5 cd5+-) 13...Kf6 14.Nd5 (14.Qe2 Nc6+-) 14...Qd5 15.Qe2 Nc6 16.Qe4 Qd7 (16...Qe5 17.Ra2+-) 17.Qf4 (17.0-0-0 Qd4 18.c3 Qd6+-) 17...Kg7 18.0-0 (18.0-0-0!? a5+-) 18...Rf8 19.Qe3 (better is 19.Qg4 Qd2 20.Rad1+-) 19...Qh3? (better is 19...Nd4!?+/–) 20.f4 (20.b5 Rf3 21.Qe4 Na5+-) 20...Qd7 (20...Qg4 21.Qg3 Rf4 22.Rae1+-) 21.f3 (21.c3 Re8 22.Qg3 Ne7+-) 21...Nd4 22.Rac1 (22.Qe4 Rf4 23.Qb7 Ne2 24.Kg2 Rc4+-) 22...Rf6? (better is 22...Re8 23.Qc3 Kh6+/–) 23.c3+- Nf5 (23...Ne6 24.Rce1 Nf4 25.Qe7 (25.Qa7 Qd2 26.Re7 Kf8–/+) 25...Rf7 26.Qd7 Rd7 27.d4+-) 24.Qe5 (24.Qa7 Qd2 25.Rcd1 Qe3 26.Qe3 Ne3 27.Rd7 Rf7 28.Rf7 Kf7+-) 24...Kf7 (24...Qd2 25.Rcd1 Qe3 26.Rf2+-) 25.d4 Nh4 (25...b5 26.Rce1+-) 26.Rcd1 (26.c4 c6+-) 26...Nf5 (26...b5 27.Rd3+-) 27.Rd3 Qc6 (27...Nd6 28.Re1+-) 28.Rc1 (28...Qc4 29.Rcd1+-; 28.Qc5 Qc5 29.dc5 Re6+-) 1–0. Scholz,Christoph – Rotter,Thorsten, Baden–ch U15, 1996.

4.Nf3 Ne7 5.Be5+/- f6 (5...Be5 6.Ne5 d6 7.Nf3+/-) 6.Bb2 0-0 7.e3 d5 8.Be2 c6 9.0-0 Bf5 10.c4 dc4 11.Bc4 Kh8 12.d4 Nd7 13.Nc3 Nb6 14.Bd3 Nbd5 15.Bf5 Nf5 16.e4 Nc3 17.Bc3 Nd6 18.e5 (18.Re1 Re8 19.Qd3 Qe7+/-) 18...Nb5 19.ef6 (19.Bb2 Qd5+/-) 19...Bf6 20.Qb3 Qd5 21.Qd5 cd5 22.Rac1 (22.Bb2 Nd6+/-) 22...Rac8 (22...Na3 23.Ne5=) 23.Bd2 (better 23.Bb2!?+/-) 23...Nd4= (23...Bd4? 24.Rc8 Rc8 25.a4+- (25.Nd4?! Nd4 26.Re1 Nf5=)) 24.Nd4 Bd4 25.Be3 Be3 26.fe3 Rf1 27.Rf1 Kg7 28.Kf2 (28.Rd1 Rd8=) 28...Rc2 29.Kf3 Kf6 30.Rd1 Ke5 31.Rd4 Rc3 32.a4 Ra3 33.a5 Rb3 (33...b6 34.ab6 ab6 35.Rh4=+) 34.h3 a6 35.g3 h5 36.g4 h4 (better 36...Rb1!?=) 37.g5+/- Rb1 38.Kg4 (better 38.Rh4!? Rf1 39.Ke2+/-) 38...Rg1= 39.Kh4 Kd6?? (39...Re1 40.Rf4 Re3 41.Rf6-/+) 40.Rg4?? (better 40.e4+-) 40...Rg4?? (better 40...Re1=) 41.Kg4+- Ke5 (41...Ke6 42.h4 Ke5 43.h5 gh5 44.Kh5+-) 42.h4 Ke4 (42...d4 43.ed4 Kd4 44.h5 gh5 45.Kh5+-) 43.h5 gh5 44.Kh5 Ke3 45.g6 d4 46.g7 d3 47.g8Q d2 48.Qe6 Kf2 49.Qd5 Ke1 50.Qe4 Kd1 (50...Kf1 51.Qf3 Ke1 52.Qe3 Kd1+-) 51.Kg4 Kc1 52.Qc4 Kd1 53.Kf3 Ke1 (53...b5 54.ab6 a5 55.ba5 Ke1 56.Qe2) 54.Qe2 1-0. GM_HUSARZ (1965) - strelka12 (2050), Rated Bullet game, lichess.org, 2015.

4.f4 Nc6 5.Nf3 (5.b5 Nd4 6.e3 Nf5 7.Be5 Be5 8.fe5 Qh4 9.g3=) 5...d6 (5...a6 6.e4 (6.e3 f6 7.Be2 Nge7 8.fe5 fe5 9.0-0=; 6.fe5 d6 7.d4 de5 8.d5 Nd4 9.e4=) 6...d6 7.Bc4 Bf6 8.fe5 Ne5 9.Ne5+=; 5...f6 6.b5 Na5 7.fe5 fe5 8.Bc3 c6 9.Ne5+=) 6.e3 (6.b5 Nd4 7.Nd4 ed4 8.e3 Qe7 9.Be2=; 6.e4 f5 7.Bd3 fe4 8.Be4 d5 9.Bd3=) 6...a6 (6...Bf6 7.fe5 Ne5 8.Nc3 Be6 9.Be2=) 7.Bc4 b5 (7...Bg4 8.h3 Bf3 9.Qf3+=) 8.Bb3 Bg4 (8...Nge7 9.0-0+=) 9.h3 Bf5 10.0-0 Nge7 11.fe5 de5 (11...Ne5!? 12.Ne5 Be5 13.Be5 de5+/–) 12.Ng5+- 0-0 13.Nf7 Rf7 14.g4 (14.e4 Qf8+-) 14...Nd5+/– 15.gf5 gf5 16.Nc3 Nce7 17.Qh5 Rf8? (better is 17...e4 18.Nd5 Nd5 19.Rf5 Rf5 20.Qf5 Bb2 21.Bd5 Kh8 22.Ba8 Ba1 23.Be4 Qe7+-) 18.Nd5 Nd5 19.e4 (19.Rf5?! Rf5 20.Qf5 Kh8+-) 19...c6 (19...fe4 20.Rf8 Kf8 21.Rf1 Kg8 22.Qf7 Kh8 23.Bd5 Qg5 24.Kh2+-) 20.Rf5 (< 20.ed5 cd5 21.Rf5 Rf5 22.Qf5 Qd6+-) 20...Rf5 21.Qf5 (21.ef5?! Kh8 22.Qg4 Qb6 23.Kh1 Qf2+/–; 21.ed5?? Rh5 22.dc6 Kh8–+) 21...Qd6 22.ed5 cd5 23.Re1 Rf8 24.Qh5 Rf7 (24...Kh8 25.Be5 Be5 26.Qe5 (26.Re5?! Qf6 27.Qe2 Qg7 28.Kh1 Rg8=) 26...Qe5 27.Re5+-) 25.Be5 Qe6 26.Bg3 Bd4 27.Kh2 Qf5 28.Qh6 Rg7 (28...Rf6 29.Re8 Kf7 30.Qf8 Kg6 31.Qg8 Kh6 32.Re7+-) 29.Qc6 (29...Rg5 30.h4+-) 1–0. bambinik – Trkn, itsyourturn.com, 2001.

4.f4 Qe7 5.e3 (5.fe5 Nc6 (5...Be5 6.Be5 Qe5 7.Nc3 Nf6 8.Nf3 Qe7 9.e3+=) 6.d4 f6 7.b5 Na5 8.Bc3 Nc4 9.Qd3+=; 5.Nf3 d6 (5...Nc6 6.e3 d6 7.b5 Nb8 8.Be2 Nd7 9.0-0+=) 6.e3 (6.fe5 de5 7.e4 Be6 8.Bb5 Nd7 9.Qe2=; 6.e4 Bg4 7.fe5 Nd7 8.Be2 Bf3 9.Bf3=) 6...Bg4 7.Nc3 Nd7 8.Be2 Nb6 9.0-0=) 5...Nh6 (5...d6 6.Nf3 Bg4 7.Be2 Nd7 8.Nc3 Nb6 9.0-0=; 5...f6 6.fe5 (6.Be2 ef4 7.ef4 Qe4 8.Nf3 Qf4 9.0-0=; 6.Nc3 c6 7.Be2 d5 8.Nf3 ef4 9.ef4=) 6...fe5 7.Nf3 e4 8.Bg7 Qg7 9.Nd4=) 6.Nf3 (6.fe5 Nc6 7.d4 Qh4 8.g3 Qe4 9.Qf3=; 6.Be5 Be5 7.fe5 Nc6 8.Nf3 Ne5 9.Nc3+=) 6...d6 7.Nc3 (7.Be2 f6 8.Nc3 Be6 9.0-0+=) 7...Bg4 (7...Be6 8.Be2 Nd7 9.Nb5=) 8.Nd5 (8.Be2 0-0 9.fe5+=) 8...Qd7 (8...Qd8 9.fe5= (9.e4=)) 9.Be2 (better is 9.fe5!? de5 10.Be5 Be5 11.Ne5 Qd5 12.Ng4 Ng4 13.Qg4+/–) 9...Bf3 10.Bf3 (< 10.gf3 c6 11.Nc3 ef4=+) 10...ef4?? (better is 10...c6 11.Nc3 ef4 12.ef4 0-0=) 11.Bg7+- Rg8 (11...Kd8 12.Bh8 Kc8 13.Nf4+-) 12.Nf6 (12...Kd8 13.Nd7 Rg7 14.Bb7 Nd7 15.Ba8 fe3 16.de3+-) 1–0. Trkn – UNIVERSAL, itsyourturn.com, 2001.

4.f4 f6 A) 5.e3 ef4 (5...d5 6.fe5 fe5 7.Nf3 Qd6 8.c4 Ne7 9.Nc3+=; 5...Ne7 6.fe5 fe5 7.Nf3 d6 8.e4 c6 9.d4=) 6.ef4 d5 7.Bd3 Ne7 8.Ne2 a5 9.0-0=; B) 5.e4 B1) 5...d6 6.Nc3 (6.fe5 fe5 7.Nf3 g5 8.h3 Nf6 9.Nc3=; 6.Bc4 ef4 7.Ne2 f3 8.gf3 Nc6 9.Ng3=) 6...Ne7 7.fe5 fe5 8.Nf3 c6 9.Be2=; B2) 5...Nc6 6.b5 (6.Bd3 ef4 7.Nh3 a5 8.b5 Ne5 9.Nf4=; 6.fe5 f5 7.Nc3 fe4 8.Ne4 d5 9.Nf2=) 6...Na5 7.d4 ef4 8.Qd2 b6 9.Qf4+=; B3) 5...ef4 6.Qf3 Ne7 7.Bc4 Nbc6 8.Qf4 d5 9.ed5=; C) 5.fe5 fe5 6.Nf3 (6.e3 d6 7.Nf3 g5 8.h3 g4 9.hg4=) 6...d6 7.e4 g5 8.h3 Nf6 9.Nc3=.

4.g3 d5 5.Nf3 d4 6.Bg2=.

4.g3 Ne7 5.Bg2 0-0 6.Nf3 d6 7.0-0 c6 8.c4 (8.Nc3 Be6=) 8...Re8 (8...Be6 9.d3=) 9.Qc2 (9.d4 e4 10.Nfd2 d5=) 9...Nd7 (9...Be6 10.d4=) 10.d3 (10.d4 Nf5 11.Rd1 e4=+) 10...Nf6 11.Nbd2 Rb8 (11...Be6 12.d4 e4 13.Ng5=) 12.Rfd1 (12.c5 e4 13.de4 dc5+/–) 12...Bg4 13.Re1 (13.d4 Bf3 14.Bf3 ed4 15.Bd4 a6+/–) 13...Nf5 (13...Be6 14.d4 e4 15.Ng5=) 14.e4+= Nh6 15.d4 ed4 16.Bd4 b6 17.Qb2 (17.Rad1 Qd7+=) 17...c5 18.Bc3 Nh5 (18...b5 19.Rad1+=) 19.Rad1 Bc3 (19...b5 20.h3 Bf3 21.Bf3+/–) 20.Qc3 f5 (20...Qf6 21.Qd3+/–) 21.h3 Bf3 22.Bf3 Ng7 23.e5 Ne6 24.Bd5+- Kh8 25.ed6 Nd4 26.Nf3 Qf6 27.Re8 Re8 28.Nd4 cd4 29.Qd4 Qd4 30.Rd4 Ng8 31.d7 Rd8 32.Bc6 Ne7 33.Ba4 Kg7 34.c5 bc5 35.bc5 Nc8 36.dc8Q Rc8 37.c6 (37…a6 38.Rd7 Kh6 39.Ra7+-) 1–0. Fischer,P – Vogt,Heinz, Bad Zurzach op, 1995.

4.h4 d6 5.h5 Bg4 6.f3 Bf6 (worse 6...Bh5 7.g4 Nf6 8.e3+/-) 7.g3 e4 (7...Be6 8.e4=) 8.Bf6 Qf6 9.Nc3 e3? (better 9...ef3 10.ef3 Be6= (worse 10...Bh5 11.g4+/-)) 10.Nd5+- ed2 (10...Qe5 11.de3 Qg3 12.Kd2 Na6 13.fg4 Qg4+-) 11.Kd2 Qe5? (11...Qg5 12.Kc3 Kd7 13.fg4 c6+-) 12.Nc7 Kd7 13.Na8 (13.fg4?! Qd4 14.Ke1 Qc3 15.Kf2 Kc7+=) 13...Nf6 (13...Bh5 14.Bh3 f5 15.g4 fg4 16.fg4 Qd5 17.Kc3 Qe5 18.Qd4 Qd4 19.Kd4 Nc6 20.Ke3+-) 14.Rb1 (14.hg6 Nd5 15.Ra2 Ne3+-) 14...Rc8 (14...Bh5 15.Bh3 Ke7 16.Rb3 Qg3 17.Re3 Kd8 18.Qa1+-) 15.Rb3 (15.fg4?! Qc3 16.Kc1 Qa3 17.Rb2 Qa1 18.Rb1 Qa3 19.Rb2 Qa1 20.Rb1 Qa3=) 15...Nc6 16.Rd3 (16.hg6 Qg5 17.e3 hg6 18.fg4 Qd5 19.Kc1 Qh1+-) 16...Nd4 (16...Be6 17.hg6 hg6+-) 17.c3 (17.fg4 Ne4 18.Ke3 Nc3 19.Kd2 Nd1 20.Kd1 Nc2-+ (20...Ra8?! 21.hg6 hg6 22.Rh7-/+)) 17...Nb5 18.Qb3 (better 18.c4 Rc4 19.hg6 Qb2 20.Ke3 hg6+-) 18...Be6 19.Bh3 Ng4 (19...Ra8 20.hg6 hg6+-) 20.Bg4 f5 (20...Qg5 21.Kc2 f5 22.Qa4+-) 21.f4 (21.Qa4 Rc3 22.hg6 Rd3 23.ed3 fg4 24.Qb5 Qb5 25.gh7 Bf5+-) 21...Qe4 (21...Bb3 22.fe5 fg4 23.hg6 hg6 24.a4 Ba4 25.c4 Rc4 26.Rh7 Ke6 27.ed6 Nd6 28.Nc7 Rc7 29.Rc7+-) 22.Qa4 Qh1 23.Qb5 (better 23.Bf3 Qg1 24.Qb5 Ke7 25.Qb7 Kf8+-) 23...Ke7 (23...Qc6 24.Qe5 fg4 25.Qg7 Kd8 26.hg6 hg6 27.Qg6 Qc4+-) 24.Bf3 Qg1 25.Qb7 Kf8 26.h6 Rc3 27.Qg7 Ke8 28.Rc3 (28.Rc3 Qc1 29.Kc1 Bf7 30.Re3 Kd8 31.Qf8 Kd7 32.Re7) 1-0. Maris,Iv (2340) - Ojas,Kulkarni (2225), Condigne Dutch Open, 2018.

4.h4 h5 5.g3 (5.Nf3 d6=) 5...d6 (5...d5 6.Nf3 Qd6 7.Bg2=) 6.Bg2 Nf6 7.c4 (7.Nf3 0-0=) 7...0-0 (7...c6 8.Nf3=) 8.d3 (8.Nf3 c6=) 8...Nc6 (8...Ng4 9.Nc3=) 9.Nd2 (9.Nf3 Bg4=) 9...Qe7 (9...Ng4 10.Ne4=) 10.e3 (10.Ngf3 Re8=) 10...Ng4 (10...Bf5 11.Qc2=) 11.Ne2 f5 (11...Bf5 12.Qc2=) 12.Bd5 (12.Nc3 Nf6+=) 12...Be6= 13.Qb3 (13.0-0 Bd5 14.cd5 Nd8=) 13...Nd8 (13...Bd5 14.cd5 Nd8 15.0-0=) 14.c5 (14.Bg2 c6=) 14...dc5=+ 15.bc5 c6 (15...Bd5 16.Qd5 Ne6 A) 17.Qb7? Rab8 (17...Nc5?! 18.Qd5 Ne6 19.Rb1=; 17...Qc5?! 18.Qb3 Qd6 19.Rb1=+) 18.Qc6 Rb2–+; B) 17.0-0=+) 16.Bc4 Re8 (16...Kh7 17.Rc1=+) 17.Rc1= Bc4 (17...Kh8 18.0-0=) 18.Rc4 (18.Nc4 Qf7=) 18...Ne6=+ 19.d4 Rad8 20.Rb4 Rd7 21.Nf3 (21.0-0 b6 22.cb6 c5+=) 21...Kh8 (21...Qf7 22.Qc2=+) 22.Ng5 Ng5 23.hg5 ed4 (23...a5 24.Ra4=+) 24.Bd4 (24.Nd4 Kh7 25.0-0 Ne5=+ (25...Qc5?! 26.Ne6 Re6 27.Qe6+=)) 24...Bd4 (24...Ne5 25.Kf1=+) 25.Rd4 Rd4 26.Nd4 (26.Qc3 Ne5 27.ed4 Nf7–/+) 26...Qg5 (26...Qc5 27.0-0 Qe7 28.Nf3=+) 27.Qf7 (27.Qb2 Qf6 28.a4 Qe5–/+) 27...Re7=+ 28.Qf8 Kh7 29.Nf5 gf5 30.Rh5 Qh5 31.Qe7 Kg8 32.Qb7 Qh1 33.Ke2 Qd5 34.Qb8 Kh7 (34...Kf7 35.Qa7 Kf6 36.Qa5 Qa2 37.Qd2 Qd2 38.Kd2 Nf2 39.Kc3–+) 35.Qc7 Kg6 36.Qd6 Qd6 37.cd6 Kf7 38.Kf3 Ke6 39.e4 Ne5 40.Kf4 Nd3 41.Ke3 fe4 42.f3 (42.f4 Nc5–+ (42...Kd6?! 43.Ke4 Nb2 44.g4–+)) 42...Nc5 43.fe4 (43.f4 Kd6 44.Kd4 Ke6–+) 43...Kd6 44.Kd4 Ne6 45.Kc4 (45.Ke3 Ke5 46.Kd3 Nc5 47.Kc4 Ne4–+) 45…Ke5 0–1. Olsson,Conny (2250) – Nilsson,Andre (2305), SWE–chT, 2007.

4.h4 h6 5.h5 g5 6.e4 Ne7 7.g4 (7.Nf3 d6=) 7...d5=+ 8.Bg2 de4 9.Be4 0-0 10.Nc3 f5 11.gf5 Nf5 12.Nge2 Nc6 13.d3 a5 14.b5 Ncd4 15.Qd2 Nd6 16.Nd4 ed4 17.Ne2 Ne4 (17...Qe7 18.Bd4 Bd4 19.Nd4 Ne4 20.Qe3 Rf2 21.de4=+) 18.de4=+ Qe7 19.Bd4 Qe4 20.0-0-0 Bg4 21.Bg7 Kg7 (worse 21...Be2 22.Bh6 Qe5 23.Qd5 Qd5 24.Rd5 Rf2 25.Rg5 Kh7 26.Bg7+/-) 22.Rhe1 (22.Qc3 Kg8 23.Qb3 Kh7-/+) 22...Rf2 (better 22...Qc4!? 23.Qd4 Qd4 24.Rd4 Bh5-/+) 23.Qc3= Kg8 (better 23...Rf6!?=) 24.Rd4+/- Qe6 (better 24...Qf3 25.Qc4 Kf8 26.Qc5 Kg7+/-) 25.Nf4?? (25.Ng3 Qf6 26.Ne4 Qf4 27.Nd2+-) 25...Qf5?? (better 25...Qa2 26.Nd5 Bh5 27.Ne7 Kh7=) 26.Nd5 (26.Nd5 Qf3 27.Ne7 Kh7 28.Qc7 Qa3 29.Kb1+-) 1-0. black_bishop_88 (2645) - kirlianitalian (2550), lichess.org, 2020. (=1.a3 e5 2.b4 g6 3.Bb2 Bg7)

5.Nc3 Nd7 6.e3 Ngf6 7.Qc2 0-0 8.Nf3 Re8 9.Be2 c6 (9...e4 10.Nd4=) 10.0-0 Qe7 11.Rfc1 h6 12.b5 Nc5 Black prepares the advance e4 13.a4 Bf5 Black intends e4 14.d3 e4 15.Nd4 Qd7 16.Nf5 Qf5 17.de4 Nfe4 18.Ne4 Bb2 (18...Ne4 19.Bf3+=) 19.Qb2 Re4 (19...Ne4 20.Bd3+=) 20.Re1 (20.Bf3 Re5 21.bc6 bc6+=) ½–½. Bender,Wolfgang – Morgenstern,Martin, SEM Meister qual1, 2004.

5.Nc3 Be6=.

5.d3 Nd7 6.Nd2 f5 7.Ngf3 Ngf6 8.Qc2 0-0 9.g3 Qe7 10.e4 c6 11.Bg2 Nb6 12.0-0 Be6 13.c5 Nbd7 14.cd6 Qd6 15.Nc4 Bc4 16.Qc4 Kh8 17.Rad1 Rae8 18.Rfe1 h6 (better 18...Re7!?=) 19.Nh4+/- Nh7 (better 19...Ng8 20.d4 Ne7 21.de5 Ne5+-) 20.a4 White prepares the advance b5 (20.d4!? Nb6 21.Qc5 Qe6 22.de5 Na4 23.Qa7 Nb2+-) 20...Ng5 (20...f4 21.d4 Qf6 22.Qc2+=) 21.b5 (21.ef5!? gf5 22.f4+-) 21...Nb6 22.Qb3 c5? (better 22...fe4!? 23.a5 Na8+/-) 23.a5 Nd7 24.Qc4 (24.Qd5 Qe6 25.Qb7 Rb8+-) 24...Kh7 (24...f4+=) 25.Bc3?? (better 25.ef5 gf5 26.f4 ef4 27.Re8 Re8 28.Bg7 fg3 29.Nf5+-) 25...Ne6?? (better 25...f4=) 26.ef5+- gf5 27.Nf5! (27.Bb7?! Nd4+-) 27...Rf5 28.Be4 Ref8 29.g4 Kh8 30.Bf5 Nd4 31.Bd4 ed4 32.Qe6 Qe6 33.Re6 Ne5 (33...h5 34.h3 Nf6 35.b6 ab6 36.Rb6+-) 34.f4 Nf3 (34...Nf7 35.Rc1 h5 36.Rc5+-) 35.Kf2 Nh4 36.Be4 Bf6 37.Kg3 Kg7 38.Rf6! Rf6 (38...Rf6 39.Kh4 Remove defender; 38...Kf6 39.Kh4 Remove defender) 39.Kh4 b6 (39...Rf4 40.Bb7 Rf2 41.h3+-) 40.ab6 ab6 41.Kg3 (41.f5 Rd6+-) 41...Rf7 (41...Re6 42.Ra1+-) 42.Ra1 Rc7 (42...Rf6 43.f5 Rd6 44.Ra7 Kf8 45.Kf4+-) 43.Ra8 (43.Ra6 c4 44.dc4 Rc4 45.Rb6 Rc3 46.Bf3 Rb3+-) 43...c4 44.dc4 Rc4 45.Rg8! Kf6 (45...Kg8 46.Bd5 Double attack) 46.Rg6 Ke7 47.Rb6 Rc3 (47...d3 48.Bd3 Rc3 49.Rh6 Rd3 50.Kh4+-) 48.Kh4 d3 49.Bf5 d2 50.Re6 Kf7 51.Rd6 Rb3 52.Be6 Ke7 53.Bb3 Kd6 54.Bd1 Kc5 55.f5 Kb5 56.f6 Kc5 57.f7 Kd4 58.f8Q Ke3 59.Qh6 (59.Qc5 Kd3 60.Kg3 h5 61.Bc2 Ke2 62.Qf2) 59...Kd4+- 60.Qd2 Ke4 61.g5 Ke5 62.Qe3 (62.Bf3 Ke6 63.Bg4 Ke5 64.Qd3 Kf4 65.Qd4) 62...Kf5 (62...Kd5 63.Bf3 Kd6 64.Qd4 Kc7 65.g6 Kc8 66.g7 Kc7 67.Qc5 Kd7 68.Bg4 Ke8 69.g8Q) 63.Bc2 1-0. opperwezen - penguingim1, lichess.org, 2017.

5.d3 f5 6.Nd2 Nf6 7.g3 0-0 8.Bg2 a5 9.Ngf3 Nc6 10.b5 Ne7 11.0-0 h6 12.Qc2 g5 13.c5 Ng6 14.Nc4 (14.c6 Ra7+=) 14...g4 (14...Re8 15.b6 dc5 16.Nfe5 Ne5 17.Be5 cb6 18.Rab1+=) 15.Nfd2+= Re8 16.cd6 cd6 17.Rfc1 (17.d4!?=) 17...d5=+ 18.Ne3 f4 19.Nef1 Re7 20.a4 Bf5 21.Nb3 Kh7 22.Ba3 Rf7 23.Nc5 h5 (23...b6 24.Nb3=+) 24.Qb3 h4 25.e4 Bc8 26.ed5 f3 27.Bh1 Nd5 (better 27...Qd5!? 28.Rc4 Bh6=) 28.Ne3+/- Nge7 (28...b6 29.Nd5 bc5 30.Nb6+/- (30.Bc5? Be6-+; 30.Rc5? Be6-+)) 29.Ne4 (29.gh4?! Kg8 30.Ne4 Ne3 31.fe3 Qd5=) 29...Bh6? (better 29...Kg6 30.Be7 Ne7 31.Rc8 Qc8+-) 30.Be7+- Ne7 (30...Qe7 31.Qd5 Qe6+-) 31.Qf7 Kh8 32.Nf6 Bg7 33.Qh5 (33.Qh5 Bh6 34.Qh6) 1-0. opperwezen (2700) - Leon4rdo (2470), lichess.org, 2016.

5.e3 Be6 6.Nf3 Nf6 7.d3 a5 8.Nbd2 0-0 9.Be2 Na6 10.Bc3 ab4 11.ab4 h6 12.0-0 c6 13.Qc2 Bf5 (13...b5 14.Rfc1=) 14.Qb2 Qe7 15.Nb3 Nd7 16.Na5 Rab8 (16...Nf6!?+=) 17.e4+/– Bg4 18.Nc6! bc6 19.Ra6 Bf3 20.Bf3 (worse is 20.gf3 Qg5 21.Kh1 Rfc8+=) 20...Nc5 21.Rc6 (21.bc5?! Rb2 22.Bb2 dc5+=) 21...Qd7 22.b5 Qc6 23.bc6 Rb2 24.Bb2 Rc8 25.Ba3 (25.Rd1 Rc6 26.Kf1 Rb6+/–) 25...Rc6+= 26.Bc5 Rc5 (26...dc5 27.Ra1+=) 27.Ra1+/– Rc7 28.Ra8 Bf8 29.Bg4 Kg7 30.Bc8 Be7 31.g3 Bg5 32.Kg2 Bd2 33.Ba6 Bc3 34.Rd8 Bb4 35.Rc8 ½–½. Bosboom,M (2455) – Hoolt,S (2245), 14th HZ Open, Vlissingen NED, 2010. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 d6)

5.e3 Be6 6.g3 c6 7.d4 Ne7 8.e4 ed4 9.Bd4 f6 10.Qd3 Nd7 11.Bc3 (11.Nd2!?=) 11...Ne5+= 12.Qd4 (12.Be5 de5 13.Nc3 Qd3 14.Bd3 0-0-0+=) 12...Qc7 13.Nd2 f5 14.Qe3 fe4 15.Qe4 Bf5 16.Qe3 0-0 17.h3 (17.Be2 Rae8 18.Be5 Be5–/+ (18...de5?! 19.g4=)) 17...Rae8–+ 18.Be2?? (18.Be5 Nd5 19.Qb3 (19.cd5? Re5 20.Rc1 Re3 21.fe3 Qe7–+) 19...Re5 20.Be2–+) 18...Nc8 19.Kf1 (19.Be5 Re5 20.Qb3 Re2 21.Ne2 Ba1 22.c5 d5 23.g4–+) 19...Nd3 20.Bg7 (20.Qe8 Re8 21.Bg7 Qg7 22.Rd1–+) 20...Qg7 (worse is 20...Kg7 21.Qd4 Ne5 22.f4+/–) 21.Rd1 (21.Bd3 Re3 22.Bf5 Qa1 23.Kg2 Qa2–+) 21...Re3 22.fe3 (22.Rh2–+) 22…Bh3 0–1. Guk,Vladimir – Jurevicius,Tomas, LTU–ch sf Vilnius, 2009.

5.e3 Qe7 6.Nc3 c6 7.Be2 f5 8.d3 Nd7 9.Nf3 Ngf6 10.0-0 0-0 11.Qb3 a6 12.c5 d5 Black plans e4 13.Na4 e4 14.Nd4 ed3 15.Bd3 Ne5 16.Nb6 Rb8 17.Be2 Ne4 18.Rad1 Re8 19.a4 Nd7 20.Nd7 Bd7 21.a5 Be5 22.f3 (22.Qc2 Qg7+=) 22...Nf6 23.g3 Nh5 24.f4 Bg7 25.Bh5 gh5 26.Rde1 (26.Nc2 h4+=) 26...Qf7 (26...h4!?=) 27.Nf3+= Re4? (27...Bb2 28.Qb2 Qe6 29.Qg2+/-) 28.Be5 (better 28.Ng5!? Qg6 29.Ne4 fe4 30.Bg7 Qg7 31.Kf2+-) 28...Be5+/- 29.Ne5 (29.Ng5 Qg7 30.Ne4 fe4 31.fe5 h4+=) 29...Qg7 30.Rf3 Be6 31.h4 Rf8 32.Rd1 Kh8 33.Kh2 Rg8 Attacking the backward pawn on g3 34.Qb2 h6 35.Rd4 Rd4 (35...Kh7 36.Qg2+=) 36.Qd4 (36.ed4!? Qf6 37.Re3+/-) 36...Kh7+= 37.Kh3 (37.Qd3 Kh8+=) 37…Rf8 (37...Re8 38.Rf2+=) ½-½. petrobbo (2060) - Stan Evans (1990), ChessWorld.net, 2015.

5.e3 Qe7 6.Nc3 Nf6 7.Nf3 0-0 8.Be2 e4 9.Nd4 c5 10.Nb3 (10.Nc2 a5=) 10...Nc6+= 11.b5 Ne5 12.h3 (12.Qc2 Bf5+=) 12...Be6–/+ 13.d4 (13.Na5!?–/+) 13...ed3 14.Bd3 Bc4 (14...Nc4 15.Bc4 Bc4 16.Na5–+) 15.Bc4–/+ Nc4 16.Nd5 Nd5 17.Bg7 Nde3?? (better is 17...Kg7 18.Qd5 Qe6–/+) 18.Bf8= Ng2 19.Kf1 Nge3 20.Ke2?? (20.fe3 Rf8) 20...Kf8 21.Qd3 Nc2 22.Kf1 Na1 23.Na1 Qe4 24.Qe4 Nd2 25.Ke2 Ne4 26.Nb3 Nc3 (26...Nc3 27.Kd2 Nb5–+) 0–1. Pencis,Aris – Petras,Milan, Muenster op, 1991.

5.e3 f5 6.d4 e4 (6...ed4 7.Nf3=) 7.Nc3 Nf6 8.Nh3 0-0 9.Nf4 g5 10.Nfe2 (10.Nh5 Nh5 11.Qh5 a5+=) 10...Nc6 11.h4 h6 (11...g4!?=) 12.hg5+/- hg5 13.Ng3 f4 (13...Kf7 14.b5 Ne7 15.Be2+=) 14.Nh5 (14.Nge4 Ne4 15.Ne4 fe3+=) 14...Bf5 (14...fe3!? 15.fe3 Ng4 16.Ng7 Nf2+=) 15.Ng7 Kg7 16.ef4 gf4 17.Rh4 e3 (17...f3 18.gf3 Re8 19.f4+-) 18.fe3+- Qe7 19.Qf3 (19.Rf4!? Qe3 20.Ne2 Bg4+-) 19...Qe3+/- 20.Qe3 (20.Ne2 Rae8 21.Qf4 Qf4 22.Rf4 Bd3+/-) 20...fe3 21.d5 Ne5 22.Nb5 Rae8 (22...Rf7 23.Be5 de5 24.d6+=) 23.Be2 (23.Nc7 e2 24.Ne8 Re8 25.Be2 Nd3 26.Kd2 Nb2+/-) 23...Rf7 24.0-0-0 (24.g4 Bh7+=) 24...Ng6 (24...a6!? 25.Nd4 Bd7=) 25.Rh5+/- Be4 26.Rg5 Kh6 (26...Kf8 27.Rf1 Nh7+-) 27.Rg3+- Nf4 28.Rh1 N6h5 29.Re3 (29.Bh5 Nh5 30.Re3 Kg5+-) 29...Ne2 30.Re2 Kg6 31.Rhe1 (31.Na7?! Nf4 32.Rhe1 Ne2 33.Re2 c6 34.dc6 Bc6 35.Re8 Be8=) 31...Rfe7 32.g3 (32.Re3 Kg5 33.c5 dc5+-) 32...Kf7 (32...a6 33.Nd4 Kf7+- (33...Ng3?? 34.Rg1 Kh5 35.Rg3+-)) 33.g4 (33.Na7?! Ng3 34.Rf2 Bf5 35.Re7 Re7+/-) 33...Ng3 34.Rf2 Kg6 35.Re3 (35.Na7?! Bd3 36.Re7 Re7+-) 35...Nh1 36.Rfe2 Kf7 37.Nd4 (37.Kd2!? a6 38.Nc7 Rc7 39.Re4 Re4 40.Re4 Ng3 41.Rf4 Kg6+-) 37...c6 38.Ne6 cd5 39.cd5 Rc8 (39...Bd5 40.Nd8! Kf8 41.Bg7 Kg7 42.Re7 Re7 43.Re7 Kf6 44.Rd7+-) 40.Kd1 Bd5 (40...Rc4+-) 41.Nd8!! Rd8 (41...Kg6 42.Re7 Kg5 43.Ne6 Be6 44.R7e6 Rc4 45.Bc1 Kg4 46.Rg6 Kf3 47.Re3 Kf2+-) 42.Re7 Kf8 43.Rh7 (43.Bg7 Kg8 44.Rh2 Nf2 45.Ke1 Nd3 46.Kd2 Bf7 47.Bf6 Kf8 48.Rh8 Bg8 49.Rg7 Nb4 50.Rhg8) 43...Ng3 (43...Bf3 44.Rh8 Kf7 45.Rd8 Ng3 46.Rd6 Be2 47.Ke1 Bb5+-) 44.Rh8 Kf7 45.Rf2 (45.Rf2 Ke6 46.Rd8+-) 1-0. Gorshtein,Ido (2370) - Bronstein,Or (2425), Ramat Gan Nov GM (7), 2020. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 d6)

5.e3 f5 6.Nf3 Nf6 7.d4 e4 8.Nfd2 c6 9.d5 0-0 10.Be2 a5 11.dc6 bc6 12.0-0 Na6 (12...ab4 13.ab4 Ra1 14.Ba1=) 13.b5 (13.Nb3 ab4 14.ab4 Qe7+=) 13...cb5 (13...Nc5 14.a4=) 14.cb5+= Nc5 Black intends a4 15.Nc4 a4 (15...d5 16.Ne5+=) 16.Nc3 (16.Qd6 Qd6 17.Nd6+/-) 16...Nb3? (better 16...d5!? 17.Ne5 Bb7+=) 17.Rb1+- (worse 17.Nd6 Be6 18.Rb1 Qe7=) 17...d5 18.Nd2 (better 18.Ne5!?+-) 18...d4 19.ed4 Nd4 20.Bc4 Kh8 21.Ne2 Ne6 22.Re1 Bb7?? (22...Qb6 23.Be6 Be6 24.Bd4+=) 23.Nf1 (better 23.Be6 Qe7 24.Nd4+-) 23...Qe7 24.Ne3 Rfd8 25.Qc2 f4 26.Nd1 Rac8 (26...f3!? 27.Ng3 Nd4 28.Bd4 Rd4-/+) 27.Qa4+= f3 28.Ng3 (28.Be6 Qe6 29.Nd4 Qd6+=) 28...Nf4 (28...fg2 29.Be6 Qe6 30.Ne3= (30.Kg2 e3 31.Kg1 Rd1 32.Qd1 ef2 33.Kf2 Ng4 34.Qg4 Qg4 35.Bg7 Kg7 36.Re7 Kh6-+)) 29.Ne3 (29.gf3 Nh3 30.Kf1 Ng5+=) 29...Ng2 (better 29...fg2 30.Red1 Rd7=) 30.Red1 (better 30.Ng2 fg2 31.Qb3+= (worse 31.Kg2 e3 32.f3 Rd2 33.Be2 Nd5 34.Bg7 Qg7=+)) 30...Ne3-/+ 31.fe3 Ng4 (31...Rd1 32.Rd1 Ng4 33.Bg7 Kg7 34.Qb3-/+) 32.Bg7-/+ Qg7 33.Nf1? (33.Qb3 Rd1 34.Rd1 Qf6-+) 33...Qh6?? (better 33...Rd1 34.Qd1 Qf6-+) 34.Rd8-/+ Rd8 35.Rd1 Rf8 Black prepares f2 36.Qc2 (36.Qb4 Ne5 37.Qe7 Nc4=+) 36...f2 (36...Qg5!? 37.Qc3 Rf6-+) 37.Kh1-/+ Qg7 (better 37...Ne5 38.Qb2 Qg5=+) 38.Qc3?? (better 38.Be2 Ne5 39.Qc3=) 38...Qf6 (better 38...Qc3 39.Be2 Ne3 40.Ne3 Qe3 41.Kg2 Qg5 42.Bg4 f1Q 43.Rf1 Qg4 44.Kh1 Rf1) 39.Qf6+/- Rf6?? (better 39...Nf6 40.a4 Ng4+/-) 40.Rd8+- Kg7 41.Rd7 Kh6 42.Re7 (42.Re7 Bc8 A) 43.Re4?? Bb7 44.Bd3 Ne5-+ (44...Be4?! 45.Be4 Re6 46.Bd5-/+); B) 43.Kg2+-) 1-0. Cwk_jaiden_s (2435) - zumpili (2500), Rated Bullet game, lichess.org, 2021.

5.e4 Be6 6.d3 Nd7 (6...Nf6 7.Nf3=) 7.Be2 Ne7 8.Nf3 0-0 9.0-0 f5 (9...Nb6 10.Nc3=) 10.Ng5+= Bf7 11.Nf7 Rf7 12.Nd2 fe4 (12...a5 13.Nf3=) 13.de4+= c5 (13...Nc6 14.c5 Rf6 15.Qb3 Kh8 16.cd6 Rd6 17.Nc4+/-) 14.b5 (14.Bg4 Nf8+/-) 14...a6 15.a4 Nf6 16.Qb3 b6 (16...Bh6 17.Nb1=) 17.Rfd1 Nc8 18.Qd3 Qc7 19.Nf1 (19.Bc3 Bh6+/-) 19...Rf8 (19...Qb7 20.Ng3+=) 20.Ne3 Qf7 21.Bf3 Bh6 22.Nd5 Nd5 23.Qd5 Qd5 24.Rd5 ab5 (24...Rf6 25.Rdd1+=) 25.ab5+/- Ra1 26.Ba1 Kf7 27.Bg4 Ke7 28.g3 Bc1 29.Rd3 (29.Rd1 Ba3+/-) 29...h5 30.Be2 Ke6 31.Bc3 Ne7 32.Kg2 Ng8 33.Rd1 Bh6 34.Bd2 Bd2 35.Rd2 Ra8 36.g4 (36.f4!?+=) 36...hg4 37.Bg4 Ke7 38.h3 Nf6 39.f3 ½-½. petrobbo (2065) - lrogue (2095), ChessWorld.net, 2015.

5.e4 Nf6 6.d3 (6.Nc3 a5=) 6...Nbd7 7.Nd2 0-0 8.Be2 Re8 9.Nb3 (9.Ngf3 Nh5=) 9...Qe7 (9...a6 10.Nf3=) 10.Nf3 Nh5 11.Bc1 Nf4 12.0-0 Ne2 13.Qe2 Nf6 14.h3 (14.Be3 c6=) 14...Be6 15.Be3 Nh5 16.Ng5 (16.Rae1 Nf4 17.Bf4 ef4=) 16...Nf4= 17.Ne6?? (better 17.Bf4 ef4 18.Ne6 Ba1 19.Nc7 Qc7 20.Ra1=) 0-1. petrobbo (2080) - buln (2470), ChessWorld.net, 2013.

5.Nf3 f5 6.e3 Nf6 7.Qc2 Be6 8.c5 Ng4 9.Bc4! Qe7 10.cd6 cd6 11.Be6 Qe6 12.Ng5 Qd7 13.Qb3 Bf6! 14.f3!? Bg5? (14...Ne3) 15.fg4 Nc6 16.Nc3 Ne7 17.0-0 d5 18.Na4! Qd6 19.Nc5 b6 20.Qa4 Kf7 21.Nd7 d4 22.Qb3 Ke8? (22...Nd5) 23.Ne5 1–0. Basman – Hardy, Cambridge 1980 (Basman).

5.g3 Be6 6.Bg2 Bc4 7.Bb7 Nd7 8.Ba8 Qa8 9.Nf3 +/–.

5.g3 Be6 6.Bg2 c6 7.d3 Ne7 8.e3 Nd7 9.Ne2 f5 10.0-0 0-0 11.Qd2 Qc7 12.f4 Rad8 13.Nbc3 Nf6 14.Rac1 Kh8 15.Rfe1 Bg8 16.Nd1 ef4 17.ef4 Rfe8 18.Nf2 b6 19.Nd4 d5 20.cd5 Bd5 21.Ne6 Be6 22.Re6 Now all is on c6 22...Nfd5 23.Rce1 Qd7 24.Bg7 Kg7 25.Qb2 Kf7 26.Qe5 Ng8 27.Re8 Re8 28.Qe8 Qe8 29.Re8 Ke8 30.Bd5 cd5 31.Kg2 Kd7 32.Kf3 Nf6 33.Ke3 Kc6 ½–½. Senkyr,V (2200) – Turner,R (2095), Open C, Marianske Lazne CZE, 2010.

5.g3 Be6 6.Bg2 Qc8 7.d3 Nf6 8.c5 0-0 9.Nf3 Bh3 10.0-0 Nc6 11.cd6 cd6 12.b5 Ne7 13.Nbd2 Bg2 14.Kg2 Qd7 15.Qb3 Rac8 16.Rac1 h6 17.a4 Nfd5 18.e4 Nc7 19.Nc4 Ne6 20.Qb4 Nf4 21.gf4 Qg4 22.Kh1 Qf3 23.Kg1 Qg4 (worse is 23...Qd3 24.Nd6 (worse is 24.fe5 Qe4 25.f3 Qh4+=) 24...Rc1 25.Rc1 ef4 26.Bg7 Kg7 27.Qc5+=) 24.Kh1 Qf3 25.Kg1 ef4 (worse is 25...Qd3 26.Nd6 (worse is 26.fe5 Qe4 27.f3 Qh4+=) 26...Rc1 27.Rc1 ef4 28.Bg7 (worse is 28.Nb7 Qh3 29.f3 Qf3–/+) 28...Kg7 29.Qc5+=) 26.Rfd1 Rc5 27.Bg7+= Rg5 28.Kf1 Rg2?? 29.Bd4+- Rh2 30.Ke1 Nf5 31.ef5 Qd5 32.Qd6 Qf5 33.Qe5 Qe5 34.Ne5 Re8 35.Kd2 Rd8 36.Rc4 Rh5 37.Ng4 Rh3 38.Rdc1 h5 39.Nf6 Kg7 40.Ne4 (40.Ne4 Kh6 41.R1c3+-) 1–0. Bahlke,Wolfgang (2130) – Heinz,Thomas (2150), Landesliga Nord, 2004. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 d6)

5.g3 f5 6.Bg2= Nf6 7.Nc3 0-0 8.d3 Nc6 9.Nf3 h6 (9...e4!? 10.de4 Ne4 11.Qd5 Kh8=) 10.0-0+= Be6 11.Ne1 a6 12.Nd5 Qd7 13.f4 (13.Nc2 Qf7 14.Nf6 Bf6+=) 13...Rae8 14.Nc2 g5 15.Nce3 (15.Qd2!? ef4 16.gf4=) 15...ef4-/+ 16.gf4? (16.Nf6 Rf6 17.Nd5-/+) 16...g4?? (better 16...Nd5 17.cd5 Bb2 18.de6 Re6-+) 17.Nf6 Bf6 18.Bf6 Rf6 19.Qd2 Nd4 20.Rae1 Bf7 21.Nd5 (worse 21.Bb7 Rfe6 22.Be4 fe4=+) 21...Rg6 Attacking the backward pawn on e2 22.Qb2 c5 23.Kh1 h5 (23...Bd5 24.Bd5 Kh7 25.e3=) 24.e3+= h4? (better 24...Nc6+=) 25.ed4+- h3 26.dc5 hg2 27.Qg2 dc5 (27...Rge6 28.h3+-) 28.bc5 Rge6 (28...b5 29.cb6 Re1 30.Re1 Bd5 31.Qd5 Qd5 32.cd5 Rb6 33.Re5+-) 29.Re5! Qc6 (29...Re5 30.Nf6 Double attack) 30.d4 (better 30.Rf5!? Rg6 31.Re5 Kf8+-) 30...Bg6 31.Rfe1 (31.Rb1 Bf7+-) 31...Kf7 (31...Bf7 32.Rb1+-) 32.Qe2 Qd7 (32...a5 33.Kg2 Bh7 34.Kg3 Re5 35.fe5+- (worse 35.de5 Bg6+-)) 33.Re6 Re6 (33...Qe6 34.Qe6 Re6 35.Re6 Ke6 36.Kg2+-) 34.Qe6 Qe6 35.Re6 Ke6 36.Kg2 Kf7 37.Kg3 Kg7 (37...Bh7 38.Kh4 Kg6 39.Ne7 Kf7 40.Nc8+-) 38.Kh4 Kh6 (38...Be8 39.Kg5 Ba4 40.Ne3+-) 39.Ne7 Bh7 (39...Be8+-) 40.d5 (40.d5 g3 41.hg3 Kg7 42.c6 bc6 43.dc6 Kh8 44.c7 Kg7 45.c8Q a5 46.Nf5 Kf6 47.Qf8 Ke6 48.Nd4 Kd7 49.Qf7 Kc8 50.Nb5 Kd8 51.Qc7 Ke8 52.Nd6 Kf8 53.Qf7) 1-0. Pridorozhni,A (2570) - Rozum,I (2570), ch-RUS Blitz, 2018.

5.g3 Nf6 6.Bg2 0-0 7.d3 Nh5 (7...Nbd7 8.Nf3=) 8.Nd2 c6 9.Nb3 Nd7 10.Rc1 Qe7 11.Qc2 f5 Black plans e4 12.d4 e4 13.e3 Ndf6 14.Ne2 g5 15.h4 h6 (better 15...g4!?=) 16.hg5+- hg5 17.d5 Qf7 (17...cd5 18.cd5 Bd7 19.Nbd4+-) 18.dc6 bc6 19.Rd1 d5 20.cd5 cd5 21.Nc5 Bd7 22.Nd4 Rae8 23.Qe2 Bc8 24.Bh3 g4 25.Bf1 Nh7 26.Qc2 Ng5 27.Be2 Nf3 (27...Nf6 28.Nb5 Rd8 29.Qa4+-) 28.Nf3 ef3 29.Bb5 Rd8 30.Nd3 (30.Bc6 Rd6 31.b5 Rfd8 32.Bg7 Kg7 33.Qb2 Nf6+-) 30...Nf6 31.Nf4 Be6 32.Qc6 (32.Bd4!?+-) 32...Bd7+- 33.Qa6 Rfe8 (33...Bb5 34.Qb5 Ne4 35.Bg7 Kg7 36.Qd3+= (worse 36.Rd5 Rd5 37.Qd5 Qd5 38.Nd5 Rd8–/+)) 34.Bf6 Bf6 35.Nd5 (35.Rd5 Bc3 36.Kf1 Bb5 37.Qb5 Be5 38.Rd8 Rd8–+) 35...Bb2 36.Bc4 Be6 37.Kf1?? (better 37.Qa5+-) 37...Bd5–+ (37...Rd5?! 38.Bd5 Bd5 39.Qa5=+) 38.Bd5 (38.Rd5 Rd5 39.Kg1 Bg7–+) 38...Rd5 39.Rd5 Qd5 40.Qg6 (40.Kg1 f4! 41.Qg6 Kf8–+) 40…Kf8 (40...Kf8 41.Kg1 Re6–+) 0–1. Boey,Jozef Martin (2415) – Enklaar,Bertus (2410), Amsterdam, 1976. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 d6)

6.Nc3 Ne7 7.Nf3 Bb7 8.d4 ed4 9.Nd4 c6 (9...0-0 10.Nf3=) 10.Qb3 0-0 11.Rd1 Qc7 12.Be2 Nd7 13.0-0 a6 14.Bf3 Ne5 15.Be4 Kh8 16.f4 Ng4 17.Nce2 (17.Rfe1 Nf6 18.Bd3 c5=) 17...Rae8 18.Bf3 Nf6 19.Ng3 Bc8 20.h3 Kg8 21.Rfe1 d5 22.Rc1 Be6 23.Ne6 fe6 24.Qd3 Rd8 25.Be5 Qb7 26.Qc3 Ne8 27.cd5 ed5 (27...Nd5? 28.Qc6 Qc6 29.Rc6 Be5 30.fe5+-; worse is 27...cd5 28.Bg7 Ng7 29.Qc7 Qc7 30.Rc7+=) 28.Red1 Be5 29.Qe5 Qc7 30.Qd4 Ng7 31.Qc3 Rd6 32.a4 Ngf5 33.Nf5 Nf5?? 34.e4 d4?? 35.Qc4+- Kg7 36.ef5 Rf5 37.Rd4?? b5 38.ab5 ab5? 39.Qd3+- Qb6 40.Rd1 Rf4 41.Qe3?? Rdd4–+ 42.Kh2 Qc7 43.g3 Rd1 44.Bd1 Rf6 45.Bb3 Qd6 46.h4 Qb4 47.Qa7 Kh8 48.Qb8 Qf8 49.Qe5 c5 50.g4 0–1. Thiel,Hans Dieter (1770) – Volikovski,Vitali (1605), Muensterland Verbandsklasse–B, 2007.

6.f4 a5 A) 7.b5 Ne7 (7...c6 8.bc6 Nc6 9.Nf3 Nf6 10.fe5 Nd7 11.Be2+=) 8.Nf3 0-0 9.fe5 Nd7 10.d4 de5 11.Ne5+=; B) 7.Nf3 ab4 8.ab4 Ra1 9.Ba1 f6 10.Nc3 g5 11.Bd3+=.

6.f4 Be6 A) 7.Be2 Nf6 (7...Ne7 8.Nf3 0-0 9.fe5 Nd7 10.ed6 Bb2 11.Ra2+=; 7...Bf6 8.fe5 de5 9.Nf3 e4 10.Nd4 Bc8 11.Qc2+=; 7...Qh4 8.g3 Qh6 9.Nc3 ef4 10.ef4 c6 11.d4=; 7...a5 8.Nf3 Nd7 9.0-0 ab4 10.ab4 Ra1 11.Ba1+=) 8.fe5 Ng4 9.Bf3 c6 10.Bg4 Qh4 11.g3=; B) 7.Nf3 Nd7 (7...Nf6 8.fe5 Ng4 9.Be2 Ne5 10.Ne5 de5 11.0-0+=; 7...a5 8.Be2 ab4 9.ab4 Ra1 10.Ba1 Nd7 11.0-0+=; 7...Nh6 8.Be2 0-0 9.fe5 Nd7 10.d4 de5 11.d5+=; 7...Ne7 8.Be2 0-0 9.fe5 Nd7 10.ed6 Bb2 11.Ra2+=) 8.Ng5 Ne7 9.Be2 0-0 10.0-0 Nf5 11.Ne6+=.

6.f4 ef4?? 7.Bg7+- (7.Bg7 Qh4 8.Ke2 fe3 9.Bh8 Qf2 10.Kd3 Bf5 11.Kc3+-) 1–0. marus – hyperion, internet live, 2001.

6.f4 Bf5= A) 7.Qe2 Nd7 (7...Nf6 8.fe5 Nfd7 9.d4 de5 10.Nd2 0-0 11.Qf3=; 7...Ne7 8.Nf3 Bg4 9.e4 0-0 10.fe5 Nd7 11.ed6=; 7...Bf6 8.d4 ed4 9.ed4 Qe7 10.Nf3 Nd7 11.Nc3=; 7...Nc6 8.Nf3 Bf6 9.d4 e4 10.Nfd2 Nh6 11.Nc3+=) 8.Nf3 Ngf6 9.d3 e4 10.de4 Be4 11.g4=; B) 7.Be2 Qh4 8.g3 Qh6 9.Nc3 ef4 10.ef4 c6 11.h4=; C) 7.Nf3 Nd7 (7...a5 8.Be2 ab4 9.ab4 Nc6 10.Ra8 Qa8 11.Bc3+=; 7...Ne7 8.Be2 Nd7 9.0-0 0-0 10.fe5 de5 11.d4+=) 8.Be2 Ne7 9.0-0 0-0 10.fe5 de5 11.d4+=.

6.f4 Nh6 A) 7.Bd3 0-0 (7...Bb7 8.Nf3 0-0 9.Be2 ef4 10.Bg7 Kg7 11.ef4+=) 8.Nf3 Bb7 9.Be2 ef4 10.Bg7 Kg7 11.ef4+=; B) 7.b5 a6 (7...0-0 8.Nc3 Bg4 9.Qc2 ef4 10.Qe4 Qh4 11.g3 fg3=) 8.Bd3 Bb7 9.Nf3 0-0 10.fe5 de5 11.Qc2+=; C) 7.d4 ef4 8.Qf3 c6 9.Qf4 Qe7 10.Bd3 Nf5 11.Bf5+=; D) 7.Nf3 0-0 (7...f6 8.Bd3 Bb7 9.Be2 e4 10.Nd4 Qd7 11.0-0+=; 7...Nd7 8.Be2 0-0 9.fe5 de5 10.Qc2 f5 11.0-0=; 7...Be6 8.Be2 0-0 9.fe5 Nd7 10.d4 de5 11.d5+=; 7...Bf5 8.Be2 Nd7 9.0-0 0-0 10.fe5 de5 11.d4+=) 8.fe5 Nd7 9.Be2 de5 10.Qc2 f5 11.0-0=.

6.Qb3 0-0 7.Nf3 =+.

6.Qb3 Be6 7.d4= e4?? 8.Nd2?? d5+= 9.c5 c6 10.b5 0-0 11.a4 Nd7 12.a5 Nf6 13.a6 Bc8 14.Bc3 Qd7 15.Ra2 Qe6 16.Ne2 b6 17.Nf4+/– Qf5 18.cb6+- ab6 19.bc6 Nc6+/– 20.Qb6 Nb8?? 21.Nb3?? Nfd7 22.Qd6+- Qf6 23.Qf6 Nf6 24.a7 Nc6+= 25.Nc5 Ra7 26.Ra7 Na7 27.h3 Bh6 28.Ne2 Nb5 29.Bd2 Rd8 30.Nc3 Nc3 31.Bc3 Bf8 32.Bb5 Bc5? 33.dc5+- Kg7 34.Bd4 Be6 35.Kd2 Rb8 36.Be2 Bd7 37.Rc1 Bc6 38.Ra1 Ra8 39.Ra8 Ba8 40.Kc3 Bc6 41.Kb4 g5 42.Ka5 1–0. clochard (2200) – youngboy (1965), net–chess.com, 2006.

6.Be2 0-0 7.Qc2 Be6 8.d4 Nf5 (8...ed4 9.Bd4 Bf5 10.Qb2 Bd4 11.ed4=) 9.d5 Bd7 10.Nd2 Nh6 (10...a5 11.Ngf3=) 11.h3 (11.Ngf3 a5+=) 11...f5 12.Ngf3 Qe7 13.c5 a6? (13...Nf7 14.cd6 Qd6 15.e4+=) 14.a4 (better is 14.cd6 cd6 15.Qc7+-) 14...Rc8 15.Bc4 Nf7 (15...dc5?? 16.d6 Qf7 17.Bf7 Nf7 18.dc7 Rc7 19.bc5+-) 16.Nb3 Be8 17.0-0-0?? (better is 17.0-0+=) 17...Ba4–+ 18.g4 fg4 19.hg4 b5 20.Bd3 Bb3 21.Qb3 e4 22.Bg7 Kg7 23.Qc3 Kg8 24.Nd4 Nd7?? 25.Ne6+= Nfe5 26.Be4 Nf8 27.f4 Ng4= 28.Rdg1 Qf6 29.Qf6 Nf6 30.Bf5 a5 31.e4 ab4 32.Kb2 Ra3 33.Ng5?? Rca8?? 34.Nh7? Ra2–+ 35.Kb3?? dc5 (35...dc5 36.Be6 Kg7 37.Rg6 Ng6 38.Nf6 R8a3; 35...N8h7?! 36.cd6 cd6 37.Bg6–/+; 35...N6h7?! 36.cd6 cd6 37.Bg6–/+) 0–1. Schulz – Haenichen, corr, 1988.

6.Ne2 0-0 7.Ng3 b6 8.Nc3 Bb7 9.Qc2 Nd7 10.f3 Nf6 11.Bd3 Bc6 12.b5 Bb7 13.0-0 Nd7 14.Nce4 f5 15.Ng5 Nc5 16.Be2 Bc8 17.d4 Ne6 18.Ne6 Be6 19.Rad1 Qe8 20.de5 de5 21.f4 e4 22.Bg7 Kg7 23.Qc3 Kg8 24.Qe5 Qf7 25.Qc7 Rfc8 26.Qb7 Rcb8 27.Qc7 Rc8 28.Qe5 Rc5 29.Qb2 Bc4 30.Bc4 Rc4 31.Qb3 Rac8 32.Rd7 R4c7 33.Qf7 Kf7 34.Rc7 Rc7 35.Ra1 Nd5 36.Nf1 Rc3 37.Rd1 Ne3 38.Ne3 Re3 39.Rd7 Kg8 40.Ra7 Rb3 41.a4 e3 42.Kf1 Rb2 43.Re7 Ra2 44.Re3 Ra4 45.Re6 Rf4 46.Ke2 Re4 47.Re4 fe4 48.Ke3 Kf7 49.Ke4 Ke6 50.Kd4 Kd6 51.g3 g5? 52.h3? h6? 53.g4+= Ke6 54.Ke4 Kd6 55.Kf5 Kc5 56.Kg6 Kb5 57.Kh6 Kc5? 58.Kg5 b5 59.h4 b4 60.h5 b3 61.h6 b2 62.h7 b1Q 63.h8Q Qc1 64.Kg6 Qc2 65.Kf7 Qc4 ½–½. Hallahan,John – Hoyt,David, Manchester, NH, 2000.

7.Nc3 a5 8.d4=.

7.Nc3 c6 8.Be2 Qc7 9.h4 d5 10.h5 Be6 11.hg6 fg6 12.Ng5 Bf7 13.Nh7 Re8 14.cd5 cd5 15.Ng5 Nd7 16.Qb3 Nb6 17.Nce4 Nc4? (better is 17...Nf5 18.Nc5 Nc4+-) 18.Rc1 b5 19.d3 Qb6 (19...de4 20.dc4 Nf5 A) worse is 21.Ne4 Rac8+-; B) 21.cb5? Qc1 (21...Bb3? 22.Rc7 Bd5 23.g4+-) 22.Bc1 Bb3–+; C) 21.Nf7?! Qf7 22.Qc2 Rf8+-; D) 21.Qc2+-) 20.dc4 de4 21.Nf7 Kf7 22.c5 Qe6 23.Qe6 Ke6 24.Bb5 Rh8 25.Ke2 a5 26.Bc4 Kf5 27.b5 Rac8 (27...Rh1 28.Rh1 Rc8 29.c6+-) 28.Rh8 Bh8 29.c6 (29.b6 Rd8+-) 29...g5 (29...Nc6 30.g4! Kf6 31.bc6 Rc6 32.Bd5 Rc1 33.Bc1+-) 30.a4 Bg7 31.Rd1 Rc7 (31...Nc6 32.g4! Kf6 33.Rd6 Ke7 34.Rc6 Rc6 35.bc6 Kd6+-) 32.Rd7 (32.Rd7 Rc6 33.bc6 (33.Re7?! Rc4 34.Rg7 Rc2 35.Ke1 Rb2+-) 33...Nc6 34.Rg7+-) 1–0. combijack (1750) – scheveloper (1740), gameknot.com, 2009.

7.Nc3 e4 8.Ng5 f5 9.Qb3 c6 10.Rd1 h6 11.Nh3 Be6 12.d4 d5 13.Nf4 Bf7 14.h4 Qd6 15.Rc1 Nd7 16.a4 Nf6 17.Ba3 Rfd8 18.a5 dc4 19.Bc4 Ned5 20.b5 Qd7 21.Nfd5 cd5 22.Be2 Rdc8 23.0-0 Bf8 24.Na4 Ba3 25.Qa3 Qd8 26.b6 Rc1 27.Rc1 ab6 28.Nb6+/– Rb8 29.Bb5 Ng4 30.g3 g5 31.Bd7 gh4+= 32.Bf5 hg3 33.Bg4 gf2 34.Kf1+/– Qg5 35.Qd6 Qg4?? 36.Qb8+- Kh7 37.Qh2 Qf3 38.Qf2 Qh1 39.Qg1 (39…Qg1 40.Kg1+-) 1–0. Wilk,Adam (2035) – Swiech,Piotr, Poland–chT reg Poland, 1995.

7.d4 a5 8.Nbd2=.

7.d4 e4 8.Nfd2 f5 9.Nc3 c6 10.Qb3 d5 11.a4 Be6 12.b5 Nd7 13.Ba3 Nf6 14.c5?? (better is 14.Be2!?+=) 14...Qc8 (better is 14...f4!? 15.Nde4 Ne4 16.Ne4 fe3 17.fe3 Nf5–+) 15.g3+= h6 (15...g5!? 16.Rg1 Ng4=) 16.a5 Rb8 17.Qa4 a6 18.ba6 ba6 19.Qc2 g5 20.Na4 f4–+ 21.Nb6 Qb7 22.Rb1 Qa7 23.Nb3? fe3–+ 24.fe3 Ng4 25.Bh3 Kh8 26.Bg4 Bg4 27.Nc1?? Rf3 28.Rb3 Bh3 29.Na2 Nf5 30.Bc1 Qf7 31.Qd1 Rf8 32.Kd2 Ne3! (32...Ne3 33.Re3 Re3–+) 0–1. Barski,Radoslaw (2275) – Gosciniak,Maria (2115), Otwarte Mistrzostwa TS Wisla Krakow – A Poland, 2011. (=1.a3 e5 2.b4 d6 3.Bb2 g6 4.c4 Bg7)

7.d4 e4 8.Nfd2 f5 9.Be2!?=.

7.d4 e4 8.Nfd2 f5 9.g3 c5=+ 10.Nb3 b6 11.Ra2 a5 12.ba5 ba5 13.dc5 a4 14.Nd4 dc5=+ 15.Nb5 Qd1 16.Kd1 Nbc6 17.Bg7= Kg7 18.Rd2 Ne5 19.N1c3 Bd7 20.Be2 Rfd8 21.Kc2 Bb5 22.Rd8 Rd8 23.cb5 Nd3 24.f3 c4 25.Rb1 Nc8 26.Na4+- Nd6 27.Nc3 Re8 28.f4 Kf7 29.a4 Nb7 30.b6 Ra8+/– 31.Rb5 Ke6 32.g4 Nd6 33.Rb1 Nb7 34.Rb5 Nd6 35.Rb1 Nb7= ½–½. Hardicsay,Peter – Dao,Thien Hai (2495), Szivarvany rapid, 1994.

7.d4 Bf5=.

6.Nc3 0-0 7.Nf3 Nc6 8.Be2 Bg4 9.h3 Bf3 10.Bf3 Nd7 11.b5 Ne7 (11...Na5!? 12.d3 a6+=) 12.Bb7+/– Rb8 13.Bf3 f5 14.Bd5 Nd5 15.Nd5 Nc5 16.d4 ed4 17.Bd4 Bd4 18.ed4 (18.Qd4?! Nb3 19.Qc3 Na1=) 18...Re8 19.Kf1 Ne4 20.g3 c6 21.bc6 Rb2 22.Rh2 Ng3 23.Kg1 Ne4 (23...Ne2!? 24.Kh1 Qh4+=) 24.Rg2 Qh4 f2 draws heavy fire 25.Qf3 Ng5? (better is 25...Kh8!?+=) 26.Qg3+- Nh3 27.Kf1?? (better is 27.Kh2 Qd4 28.Kh3+-) 27...Rf2–+ 28.Rf2 (28.Qf2 Nf2 29.Nf6 Qf6 30.Rf2 Qd4 31.Rc1 Qd3 32.Kg1 Qg3 33.Rg2 Qe3 34.Rf2 Qc1 35.Kh2 Re1 36.c7 Qh6 37.Kg3 Qg5 38.Kh2 Qg1 39.Kh3 Re3 40.Rf3 Rf3 41.Kh4 Qg3) 28...Qg3 29.Nf6 Kf7 30.Ne8 (30.Ne4 Re4 31.Rf5 gf5 32.Re1 Re1) 30...Qf2 0–1. combijack (1745) – thepunisher (1765), gameknot.com, 2012.

6.d3 0-0 7.Nf3 Ng4 8.h3 Nh6 9.g4 f5 10.g5 Nf7 11.h4 c6 12.Nbd2 a5 13.Nb3 b6 14.Qc2 ab4 15.ab4 Ra1 16.Ba1 Na6 17.Bc3 c5 18.b5 Nc7 19.Rg1 d5 20.Bb2 Bb7 21.Nfd2 d4 22.Be2 Ne6 23.Bf3 e4 24.de4 Ne5 25.Bg2? (better is 25.ed4!? Nf3 26.Nf3 Be4 27.Qd1–/+) 25...de3–+ 26.fe3 Nd3 27.Ke2 fe4 (27...Bb2?! 28.Qd3 Qe7 29.Qc2=) 28.Bg7 Rf2 (worse is 28...Ng7 29.Kd1 (29.Ne4?? Be4 30.Be4 Rf2 31.Kd1 Nb2 32.Kc1 Rc2 33.Kc2 Nc4–+) 29...Nf5 30.Nf1–+; 28...Kg7 29.Qc3 (29.Ne4? Be4 30.Qc3 Nd4 31.Kd1 Bg2 32.Rg2 Rf1 33.Kd2 Nf4–+) 29...Kg8 30.Rf1 Rf1 31.Kf1=) 29.Kd1 Ng7 30.Bh3 Rh2 31.Bg2 Nf5 32.Nf1 Rh4 33.Nbd2?! Qg5 34.Be4 Qh5 (34...Qh5 35.Bf3 Bf3 36.Nf3 Qf3 37.Qe2 Nb2 38.Ke1 Qe2 39.Ke2 Nc4–+) 0–1. Deepan,Chakkravarthy J (2460) – Rahman,Ziaur (2520), Mumbai IND, 5th Open, 2012. (=1.c4 e5 2.a3 d6 3.b4 g6 4.Bb2 Bg7)

6.d4=.

6.Ne2 0-0=.

6.Nf3 e4 7.Nd4 =+.

7.d4 ed4 8.Nd4 Nbd7 9.Be2 Ne5 10.0-0 Bg4 11.Nd2 Be2 12.Qe2 Qd7 13.N2f3 Rfe8 14.Rfd1 Nf3 15.Nf3 Re4 16.Qc2 Qe7 17.Rd4 Re8 18.Re4 Qe4= 19.Rc1 Qc2 20.Rc2 a5 21.Kf1 ab4= 22.ab4 Ra8 23.Ke2 Ra4 24.b5 Nd7 25.Bd4 Rb4 26.Nd2 Ra4= 27.Nb3 b6 28.Nc1 Bd4 29.ed4+= Nf6 30.f3 Kg7 31.Kd3+= d5 32.cd5 Nd5 33.Ke4 Nf6 34.Ke5 Rb4–/+ 35.Nd3 Rb5 36.Kf4 Nd5 37.Kg3 Rb3 38.Nf4 Rc3 (39.Re2 Re3 40.Re3 Ne3–/+) 0–1. Olesen,Martin – Antonsen,Mikkel, Copenhagen DEN, 1990.

7.d4 e4 8.Nfd2 a5=.

7.Be2 a5 8.Nc3 Nbd7 9.0-0= e4 10.Nd4 c6 11.Qc2 Re8 12.Nb3 ab4 13.ab4 Ra1 14.Ra1 Ne5 15.Ra8 d5 16.cd5 cd5 17.Na4 Nc4 18.Bc4 dc4 19.Qc4 Be6 20.Rd8 Bc4 21.Re8 Ne8 22.Na5 Bb5 23.Bg7+/– Ba4 24.Bd4 b5 25.f3 f5 26.fe4 fe4 27.Nb7 Bc2 28.Be5 Kf7 29.Nc5 g5 30.Kf2 Kg6 31.Ke2 Kf5 32.Bc3 Nd6 33.d4 ed3 34.Nd3 Ne4 35.Ne1 Bb3 36.Kd3 Bc4 37.Kd4 Bf1?? 38.Bb2 g4 ½–½. Koester,Roman (2085) – Mueller_Ludwig,Kristin (2105), Oberliga East B, 2005.

7.Be2 e4 8.Nd4=.

7.Be2 Be6 8.d3 c6 9.Nbd2 Ne8 10.0-0 f5 11.Rb1 Nd7 12.Re1 d5 13.cd5 cd5 14.Bf1 e4 15.de4 fe4 16.Bg7 Ng7 17.Nd4 Qf6 18.Qe2 Ne5 19.Ne6 Ne6 20.h3? (better is 20.Red1+=) 20...Nd3–+ 21.Red1 Rac8?? (better is 21...Nf2 22.Re1 Qg5 23.Qf2 Rf2 24.Kf2 Rc8–+) 22.f4 Rc2?? (better is 22...Rc3–/+) 23.Qg4?? (better is 23.Ne4 Qf4 24.ef4 (24.Qd3?! Qe4 25.Qd5 Qe3 26.Kh1 Rc6+=) 24...Re2 25.Be2 (25.Rd3?! Re4 26.g3 Rd4+=) 25...de4 26.Bd3 ed3 27.Rd3 Rf4 28.Rf1 Rf1 29.Kf1+-) 23...h5 24.Qg3 Ng7?? 25.Bd3= ed3 26.Qe1 Nf5= 27.Nf3?? Re8 28.Ne5?? g5?? 29.Rd3+/– gf4 30.ef4 h4 31.Rc1 Qb6? 32.Kh2+/– Rc1 33.Qc1 Qb5 34.Qd1 Rd8 35.Qg4 Ng7 36.Qg6 Rf8 37.Qg5 Rf5 38.Qd8 Ne8 39.Rd5 Qa4 40.Rd3 a5 41.Qd5 Kh7 42.Ng4 Rd5–+ 43.Rd5 ab4 44.ab4 Qb4 45.Rd7 0–1. Fournier,Frederic – mastacampa, kurnik.com, 2009.

6.Nc3 0-0 7.e4 Nc6=.

6.Nc3 0-0 7.h3 Re8 (7...e4 8.Nd4=+) 8.e4= c6 9.Rc1 d5 10.cd5 cd5 11.ed5 (11.Bb5 Bd7 12.Bd7 Qd7=) 11...e4=+ 12.Nd4 Nd5 13.Nd5 Qd5 14.Bc4 Qg5 15.Qb3 Qg2 (better 15...Qe7!?=) 16.Bf7+/- Kh8 17.Ke2 Bg4?? (better 17...Nc6 18.Nc6 bc6 19.Bg7 Kg7=) 18.hg4+- Qg4 19.Kf1 Rf8 (19...Nd7 20.Ne6 Re6 21.Be6 Qf4 22.Bd7 Rf8 23.Bg7 Kg7+-) 20.Ne6 h5 (20...Qg2 21.Kg2 h5 22.Bg7 Kh7 23.Qe3 Rf7 24.Qh6 Kg8 25.Qh8) 21.Bg7 Kh7 22.Bf8 (22.Qe3 Qf4 23.Qf4 Rf7 24.Qh6 Kg8 25.Qh8) 22...Nc6 (22...Qf4 23.Nf4 Nc6 24.Bg6 Kh8 25.Rh5) 23.Qc3 (23.Qc3 Qg1 24.Kg1 Nd4 25.Ng5 Kh8 26.Qd4; 23.Bg8 Kg8 24.Ng5 Kh8 25.Qc3 Nd4 26.Qd4 Kg8 27.Qg7) 1-0. Moraes,Maurino Anastacio D - Acosta,P (1940), Brazil Curitiba Open, 2018.

6.Nc3 Bf5=.

6.e3 0-0 7.d4 e4 8.Nfd2 Nc6=.

6.e3 0-0 7.Be2 Nc6 8.0-0= Re8 (8...e4 9.Nd4=) 9.d4 ed4 10.Nd4 Nd4 11.Bd4 Bf5 12.Nd2 a6 13.Rc1 Qd7 14.Nf3 (14.Re1 a5=) 14...h6 15.Qb3 Be4 (15...Qe6 16.Rfd1=) 16.h3 (16.Nd2 Bc6=) 16...Bc6 (16...a5 17.Nd2 ab4 18.ab4= (18.Qb4? c5 19.Qb2 cd4–+; 18.Ne4?! Ne4 19.Bg7 Kg7=)) 17.Qb2 White gets the initiative 17...Nh5 (17...Qe6 18.Rfd1=) 18.Nh2 Bd4 19.Qd4 (19.ed4 Bg2 20.Bg4 Qc6+/–) 19...Ng7? (19...Qe6 20.Bh5 gh5 21.Rcd1+=) 20.Ng4 Nh5 (20...Nf5 21.Nf6 Kh8+-) 21.Nh6+- Kh7 22.Ng4 Qe7 23.Nh2 (23.Rfd1 f5 24.Nh2 Qe4+-) 23...Ng7 24.Bf3 Nf5 25.Qc3 Bf3 26.Nf3 (26.gf3?! Nh4=) 26...Rad8 27.Rcd1 Nh4 28.Nh2?? (28.Nh2 Qe4 29.f3 Qe3 30.Qe3 Re3 31.g3+=; better is 28.e4+-) 1–0. Ziese,Gerhard – Wong,Ray, corr 3GMM–22, 1996.

6.e3 0-0 7.Be2 e4 8.Nd4 +=.

6.e3 0-0 7.Be2 Re8 8.0-0 Nbd7 9.Nc3 Nf8 10.Qc2 Bf5 11.d3 c6 12.Rad1 Qe7 13.Ne4 N6d7 14.Rd2 h5 15.h4 Bg4 16.Rc1 d5 17.Ng3 Ne6 18.Nf1 d4 19.g3 Bh3 20.Re1 c5 21.ed4 cd4 (worse is 21...cb4 22.de5 ba3 23.Bc3+=; 21...ed4?! 22.bc5 Ndc5 23.Rdd1+=) 22.Bd1 b6 23.Rde2 Qd6 24.Bc1 a5 25.Qb1 ab4 26.ab4 Qc6 27.N1h2 f6 28.Ra2 Bf8 29.Ree2 Ra2 30.Qa2 (better is 30.Ra2!? Ra8 31.Ra8 Qa8 32.Ne1+=) 30...Bb4–+ 31.Ba4 Qb7 32.c5 (better is 32.Bd2!? Bd2 33.Bd7 Qd7 34.Nd2–+) 32...Bc5 33.Bb3 Kh7 34.Bd5 Qc8 35.Rc2 Nc7 36.g4? (36.Be4 Be6 37.Qb1 Nd5–+) 36...Nd5 (36...hg4!? 37.Nd2–+) 37.Qd5 Re7 38.g5 Be6 39.Qe4 f5 40.Qe2 Qb8 41.Nf1 e4! 42.de4 (42.Ne1 Bd5 43.de4 fe4–+) 42...fe4 43.Nd4 Bd4 44.Qe4 Qe5 (44...Qe5 45.Qe5 Ne5–+) 0–1. Schulenburg,Peter (2285) – Borngaesser,Rene (2355), Oberliga NRW, 1995. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 d6)

6.e3 c6 7.Be2 0-0 (7...e4 8.Nd4=) 8.0-0 (8.d4 e4 9.Nfd2 Re8+=) 8...Nbd7 (8...e4 9.Nd4=) 9.Nc3 (9.d4 Qe7+=) 9...d5 (9...e4 10.Nd4=) 10.cd5+= cd5 11.Nb5 (11.Rc1 a5+=) 11...Ne8 (11...a6 12.Nc3=) 12.Qb3+= a6 13.Nc3 d4 (13...Nb6 14.Rac1=) 14.Ne4 (14.ed4 ed4 15.Ne4 Ndf6+/–) 14...Nb6 (14...Ndf6 15.Nf6 Bf6 16.ed4 ed4 17.Rfe1+=) 15.Nc5 (15.ed4 Be6 16.Qc2 Rc8+=) 15...Nc7 (15...Nd5 16.ed4 Nf4 17.Bc4 ed4 18.Rfe1+=) 16.Rfc1 (16.ed4 ed4 17.Rfe1 Re8+=) 16...Ne6 (16...Nbd5 17.ed4 b6 18.Ne4=) 17.a4 (17.Bd3 a5+=) 17...Nd5 (17...a5 18.ba5 Ra5 19.ed4+=) 18.Bc4 Nc5 (18...Ndc7 19.a5+/–) 19.bc5+/– Be6 20.Rab1 (< 20.Qb7 Rb8 21.Qa6 Rb2–/+) 20...Rb8 21.ed4 e4 (21...b5 22.ab5 ab5 23.Bf1+= (< 23.Bb5 e4–/+)) 22.Ne5+/– b5 23.ab5 ab5 24.Bf1 Qc7 25.f3 f6? 26.fe4+- Nf4 27.d5 fe5 28.de6 Qe7 29.c6 Qe6 30.Ba3 Qb3 31.Rb3 Rfc8 32.Bb5 Ne2?? 33.Be2+- Rb3 34.Bc4 (34...Kh8 35.Bb3+-) 1–0. Basman,Michael – Broome,W, 1979.

6.e3 e4 7.Nd4=.

5.d4 0-0 6.e3 ed4 7.Bd4 (worse is 7.ed4 d5+=) 7...Bd4 8.Qd4 d5 9.Nf3 Nbc6 10.Qh4 d4 11.b5 Na5 12.Qd4 (12.ed4 f6 13.c5 Nf5+=) 12...Qd4 13.Nd4 c5 14.Nf3 a6 15.a4 Be6 16.Nfd2 Nc8 17.Ne4 Bc4 18.Bc4 (better is 18.Nc5!? ab5 19.ab5+/–) 18...Nc4= 19.ba6 b6 20.Nbd2 Nd2 21.Kd2 Ra6 22.Rhb1 Rd8 23.Ke2 Ne7 24.g4 ½–½. Antoli Royo,JM (2395) – Ramiro Ovejero,JL (2345), Figueres ESP, 2012. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 Ne7)

5.d4 d6 6.de5 de5 7.Qd8 Kd8 8.Nf3 f6 9.Nc3 Be6 10.e3 Nd7 11.Be2 c6 12.0-0 Kc7 13.Nd2 Rhd8 14.Rfd1 a5 ½–½. Kraus,To (2360) – Pribyl,Jo (2315), Liberec CZE, Desko Open, 2013. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 Ne7)

5.d4 e4 6.Nc3= (6.e3 0-0 (6...Nbc6 7.Nc3 0-0 8.Nge2 Re8 9.Qc2 Nf5 10.b5 Na5) 7.Nc3 Re8 8.Nge2 Nbc6 9.Ng3 f5 10.Qb3 f4) 6...f5 (6...0-0 7.e3= a5 8.Nge2 d5 9.Nf4 Nd7 10.cd5 Nf6; 6...Nbc6 7.e3 0-0 8.Ne4 Re8 9.Nf3 d5 10.cd5 Nd5) 7.d5 (7.e3 f4 (7...0-0 8.Nh3 Bh6 9.Be2 d5 10.0-0 Nd7) 8.ef4 0-0+= 9.Nge2 d5 10.cd5 Nd5; 7.Nh3 e3 8.fe3 0-0 9.c5 Nbc6 10.g3 Bh6) 7...d6 (7...0-0 8.Nh3= a5 9.b5 b6 10.g3 Bb7) 8.e3 0-0 9.Na4 (better is 9.Nge2+= a5 10.Nf4 ab4) 9...Bb2–/+ 10.Nb2 c6 (10...f4!? 11.ef4 Rf4–/+; 10...c5–/+) 11.Ne2= cd5 12.cd5 a5 13.Rc1 ab4 14.ab4 Qb6 15.Qd4 Nd7 16.Nc3 (16.Nc4!? Qb4 17.Nc3=) 16...Qd4–/+ 17.ed4 Nf6 (17...Nb6 18.Nc4 Nbd5 19.Nd6–/+) 18.Bc4+= Bd7 19.0-0 Be8 (19...Nc8 20.Be2–/+) 20.Bb3 (20.f3 e3+=) 20...Bf7 21.Nc4 Rfd8 22.Nb5 Ne8 23.Na5 (better is 23.f3!? Bd5 24.fe4 fe4 25.Rce1–/+) 23...Bd5–+ 24.Nc7 (24.Bd5!? Nd5 25.Nb7–+) 24...Ra5! 25.Nd5? Rd5 26.b5 Kg7 27.Bd5 Nd5 28.Rc4 Kf6 29.Rfc1 Ke6 30.h3 Nf4 31.Kf1 Nd3 32.Ra1 Kd5 33.Rca4 Rc8 34.Ra7 Rc7 35.R7a4 Rc2 36.Ra7 Rf2 37.Kg1 Rb2 38.Rb7 Nf6 39.b6 e3 40.Rf7 Ne4 41.b7 Nf4 42.Ra2 Ra2 43.b8Q Rg2 44.Kf1 e2 45.Ke1 Rg1 (45...Nd3) 0–1. Seslavin,Maxim – Chernov,Mikhail, Novokuznetsk RUS, Winter Open, 2013. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 Ne7)

5.e3 0-0 6.Nc3 d5 7.cd5 Nd5 8.Qb3 Nb6 9.Qc2 Bf5 10.d3 N8d7 11.Be2 c6 12.Nf3 Qe7 13.Ne4 Rfd8 14.0-0 Rac8 15.Ng3 Be6 16.d4 Bg4 17.Rfe1 ed4 18.Nd4 Be2 19.Qe2 c5 20.Ndf5 gf5 21.Nf5 Qg5 22.Ng7 Na4 23.f4 (better is 23.h4 Qh4 24.Nf5+=) 23...Qg6–/+ 24.f5 Qg5 25.f6 Nb2 (25...Nf6?! 26.Bf6 Qf6 27.Nh5=) 26.Qb2 Nf6 27.Rf1?? (27.Nf5 Qf5 28.Rf1 Qe6 29.Qf6 Qf6 30.Rf6 c4+=) 27...Qg7 (better is 27...Ne4 28.Qc2 Qe3 (28...Kg7?! 29.Qe4 Rc7 30.Rac1+=) 29.Kh1 Kg7–+) 28.Qf6 Qf6 29.Rf6 c4 30.Rf2 Rd3 31.Re2 b5 32.Kf2 Rc6 33.a4 Rf6 34.Ke1 Ra6 35.Rea2 Re3 36.Kf2 Re5 37.ab5 Rf6 38.Kg1 Rb5 39.Ra7 Rb4 40.Rc7 Kf8 41.g3 Re6 42.Rf1 Re7 43.Rc8 Kg7 44.Rc1 Exerts pressure on the isolated pawn 44...Re4 45.Rc7 ½–½. Pietrzak,Janusz (2065) – Szczyrba,Daniel (2175), Chorzow Poland, 2008.

5.e3 0-0 6.Be2 d5 7.cd5 (7.Nf3 e4 8.Nd4 (8.Bg7 ef3 9.Bf8 fe2 10.Qe2 Kf8 11.h4 dc4 12.Qc4 Be6 13.Qc2 Nbc6 14.Nc3) 8...Nf5 9.cd5 (9.0-0 dc4 10.Qc2 Nd4 11.Bd4 Bd4 12.ed4 Qd4 13.Nc3 Nc6 14.Qe4; 9.Nf5 Bb2 10.Ra2 Be5 11.Ng3 f5 12.Nc3 d4 13.ed4 Bd4 14.0-0; 9.Nc3 Nd4 10.ed4 dc4 11.0-0 Bd4 12.Qc2 Nc6 13.b5 Ne5 14.Ne4) 9...Qg5 10.Qc2 (10.Nf5 Bb2 11.Ra2 Bf5 12.g4 Bg4 13.Bg4 Bg7 14.Nc3) 10...Qg2 11.Rf1 Nd4 12.ed4 c6 (12...Qh2 13.Qe4 Bf5 14.Rh1) 13.Nc3 Bd4 14.d3) 7...Nd5 8.Nc3 (8.Qc2 Re8 9.Nc3 e4 10.Nd5 Bb2 11.Qb2 Qd5 12.f3 Qg5 13.fe4; 8.Nh3 Nc6 9.b5 Nce7 10.Nc3 Bh3 11.gh3 Qd7 12.Bf3 Rfd8 13.Qb3) 8...Be6 (8...Nc6 9.b5 Nce7 10.Nf3 e4 11.Ng5 Bf5 12.g4 h6 13.gf5) 9.Qc2 (9.Qc1 a5 10.Nf3 ab4 11.Nd5 Qd5 12.ab4 Nc6 13.b5) 9...a6 (9...a5 10.b5 Nd7 11.Nd5 Bd5 12.e4 Be6 13.Nf3) 10.Nf3 (10.Ne4 Nd7 11.Nf3 a5 12.b5 Bf5 13.Bd3) 10...h6 (10...Nc3 11.Qc3 Nc6 12.h4 Bg4 13.Bd3) 11.Na4 (11.Ne4 Nd7 12.Nc5 Nc5 13.bc5) 11...Nd7 12.d4 (12.Nc5 Nc5 13.bc5) 12...b5 (12...a5 13.b5) 13.Nc5 Nc5 14.dc5 Re8 15.0-0 (worse is 15.Ne5 Bf5 16.Bd3 Be5 17.Bf5 Bb2 18.Qb2 gf5–+; 15.Be5?! Be5 16.Ne5 Qg5=) 15...e4 16.Nd4 f5 17.Ne6 Re6 18.Bg7 Kg7 19.Rfd1 Qf6 20.Rd4 c6 21.Rad1 Rae8 22.g3 g5 23.Bf1 f4 24.ef4 gf4 25.Re1 0–1. Goumas,G (2315) – Nuri,Kam (2195), XIX EYCC Boys U18, Fermo ITA, 2009. (=1.c4 e5 2.a3 g6 3.b4 Bg7 4.Bb2 Ne7)

5.Nf3 d6 6.e3 0-0 7.Qb3 (7.d4 Bf5=) 7...Nd7 (7...Bg4 8.Be2=) 8.Nc3= b6 (8...Nc6 9.e4=) 9.d4 c5 10.Rd1 (10.dc5 dc5 11.Be2 f5=) 10...ed4 11.ed4 Nf5 12.dc5 dc5 13.Be2 Bb7 (13...Re8 14.Nd5=) 14.0-0 (14.Qa4 Nd4 15.Nd4 cd4 16.Nb1 Bg2 17.Rg1=) 14...Qc7 (14...Re8 15.Rfe1 Bf3 16.Bf3–/+) 15.Nd5 (15.Nb5 Qc6+=) 15...Bd5+= 16.Rd5 (16.cd5 Bb2 17.Qb2 cb4 18.Qb4 Rfe8+/–) 16...Nf6 (16...Bb2 17.Qb2 Ne7 18.Rd3+=) 17.Rdd1 (17.Be5 Qe7 18.Bf6 Qf6 19.bc5 bc5 20.Rc5 Qe7+/–) 17...Rad8 (17...cb4 18.Be5 Qe7 19.Qb4 Qb4 20.ab4+=) 18.Be5 Qe7 19.Rfe1 Rd1 20.Bd1 (20.Qd1?! cb4 21.ab4 Qb4=; < 20.Rd1 Re8+=) 20...Rc8 (20...Rd8 21.Bc2 Qd7 22.Rd1+/–) 21.Bc2+/– Qd7 22.Rd1 Qe6 23.Qa4 cb4 24.Qa7 ba3 25.Qa3 Ne8 26.Bg7 Neg7 27.Bb3 Qc6 28.Qa2 Ne6 29.h3 Rd8 30.Rd5 Rd5 31.cd5 Qc1 32.Kh2 Nc5 33.Bc4 Qf4 34.Kg1 Nd6 35.Be2 Qa4 36.Qb2 Qb3 37.Qe5 Ncb7 38.Ba6 Qb1 39.Kh2+/– Qf5 40.Qf5 gf5 41.Bd3 Nc5+= 42.Bb1 Kg7 43.Nd4 Kf6 44.f4 Nce4 45.Kg1 Nc3=+ 46.Bc2 Nd5 47.g3 Ne4 48.g4 Nf4 49.Nf5 Ke5 50.h4 b5 51.Nh6 f6 52.Nf7 Kd4 53.g5? fg5 54.Be4–/+ Ke4 55.Nd6 Ke5 56.Nb5 g4 57.Kf2 h5 58.Nc3 Nd5 59.Ne2 Kf6 60.Ng3 Kg6 61.Ne2 Ne7 62.Nf4 Kh6 63.Ke2 Nf5 64.Ng2 Kg6 65.Nf4–/+ Kh6 66.Ng2–+ Kg7 67.Nf4–/+ Nh4 68.Nh5 Kg6 69.Ng3 Kg5 70.Kf2 Nf5 71.Ne2? Kh4–+ 72.Kg2 Ne3 73.Kf2 Nd5 74.Kg2 Nf6 (better is 74...Kg5!?–/+) ½–½. Wilk,Adam (2035) – Kwiatkowski,J, Poland–chT reg Poland, 1995.

5.g3 0-0 6.Nc3 +=.

5.g3 0-0=+ 6.Bg2 c6 7.d3 d5 8.Nd2 Be6 9.Ngf3 (9.cd5 cd5 10.Ngf3 e4=) 9...dc4 (9...e4 10.Bg7 ef3 11.Bf8 fg2 12.Rg1 Qf8 13.Rg2-/+) 10.Ng5 (10.Nc4 e4 11.Ng5 Bb2 12.Nb2 ed3 13.Nd3 Nd5 14.Ne6 fe6=) 10...Bf5 (10...cd3!? 11.Ne6 fe6=+) 11.Nc4= Nc8 12.Ne4 Qe7 13.0-0 Nd7 14.a4 Rd8 (14...Qb4?? 15.Ba3 Be4 16.Bb4 Bg2 17.Kg2+-) 15.b5 cb5 16.ab5 Ndb6 17.Nb6 (17.Ba3 Qc7 18.Ne3 Be4 19.Be4 Bf8+=) 17...Nb6 18.Ba3 Qd7 19.Nc5 Qb5 20.Nb7 Rd4 (20...e4!? 21.Rb1 Qe8 22.Nd8 Rd8+/-) 21.Nd6+- Rd6 22.Bd6 e4 23.de4 Ba1 24.ef5 Rd8 25.Qa1 Rd6 26.Qa7 Rd8 27.fg6 hg6 28.e3 1-0. Hollan,Martin (2340) - Lajbl,Jan (2145), Ceske Budejovice Open, 2021. (=1.c4 (A20: English Opening: 1...e5) 1...e5 2.a3 g6 3.b4)

5.g3 d6 6.Bg2 0-0 7.e3 (7.Nc3 a5+=) 7...c6 (7...Nd7 8.Ne2+=) 8.d4 (8.Nc3 Be6+=) 8...Nd7 (8...ed4 9.Bd4 Bd4 10.Qd4+=) 9.Ne2 Nb6 10.Nd2 Bg4 11.h3 Be2 12.Qe2 ed4 13.ed4 (13.Bd4!? Bd4 14.ed4+=) 13...Nf5–/+ 14.0-0-0 (14.0-0 Re8 15.Qd1 a5–/+) 14...Bd4 (14...a5 15.Qd3–+) 15.Bd4 (15.Ne4 c5–/+) 15...Nd4–+ 16.Qd3 Nf5 (16...Ne6 17.Ne4 d5 18.cd5 cd5 19.Nc3–+) 17.Ne4 (17.Be4 Ne7–/+) 17...d5–+ 18.Qc3 f6 (18...d4 19.Qa1 a5 20.g4 ab4 21.gf5–+) 19.Nc5 (19.cd5 Nd5 20.Qb3 Kh8+=) 19...Rf7 (19...Nc4 20.Ne6 Qb6 21.Nf8 Rf8 22.Rd5 cd5 23.Bd5 Kh8 24.Qc4 Qf2 25.Qc5 Qc5 26.bc5–+) 20.cd5+= Nd5 21.Bd5 cd5 22.Qb3 (22.g4 Ne7 23.Nb7 Qb6–/+) 22...Ne7 (better is 22...b6!? 23.g4 Ne7–/+) 23.Kb2+= b6 24.Ne6 Qd7 25.Rhe1 Rc8 26.Nf4 Increasing the pressure on the isolated pawn on d5 26...Rd8 (26...d4 27.Qe6 Qa4 28.Rc1+=) 27.g4 (27.h4 a5=) 27...Qd6 (27...a5 28.Rd4+=) 28.Ne6 (28.Qg3 f5 29.Ne6 Qg3 30.fg3 Rd7=) 28...Rd7 (28...Rc8 29.Rd4+=) 29.f4 (29.b5!?=) 29...Nc6+= 30.Re2 (30.f5 Ne5+=) 30...Ne5 31.f5 (31.fe5 Qe6 Decoy (31...Qe6 Interception)) 31...Qc6 (31...Rfe7 32.Kb1=) 32.Re5 (32.Ka2 Rd6=) 32...fe5+= 33.Rc1 Qb7?? (better is 33...Qa8 34.Qc3 Qe8 35.Qe5 d4+=) 34.Qc3+/– Rf6 35.Qe5 Kf7?? (35...Rdf7!?+/–) 36.Nd8 (36.Rf1 g5 37.Ng5 Kg7 38.Ne6 Kg8 39.Qf6+-) 36...Rd8 37.Rc7 Qc7 38.Qc7 Ke8 39.Qh7 gf5 40.g5 Rf7 41.Qh8 Ke7? 42.Qe5 Kf8 43.g6 Re8 44.Qh8 Ke7 45.g7 f4 46.Qe8!! Ke8 47.g8Q Ke7 48.Qg5 Kf8 49.Qh6 Kg8 50.Qg6 Kf8 51.Qg2 f3 52.Qf2 Ke7 53.Kc3 Ke6 54.Kd2 1–0. Borysiak,Boguslaw (2200) – Krasiewicz,Robert (2040), 38th YMCA Summer, 2007.

5.h4 d5 6.cd5 Nd5 (worse is 6...Qd5 7.Nc3 Qd8 8.h5+=) 7.Nf3 f6 (better is 7...0-0!?+=) 8.e3= Be6 9.Nc3 Nd7 10.Rc1 a6 (10...a5 11.b5+=) 11.Qc2 c6 (11...Nc3 12.Qc3 c6 13.h5+=) 12.h5+/– Bf7 13.hg6 hg6 14.Rh8 Bh8 15.d4 (15.Nd5 cd5 16.d4 e4+=) 15...ed4 (15...Nc3!? 16.Bc3 Qe7+=) 16.Nd5+/– cd5 17.Bd4 Ne5 18.Qc7 Qc7 (18...Qd7!?+/–) 19.Rc7+- b5 (19...Nf3 20.gf3 b5+-) 20.Ne5 fe5 21.Bc5 Bf6 (better is 21...Bg8 22.Be2 Bf6+-) 22.g3?? (better is 22.Rc6 Be7 23.Ra6+-) 22...Be6+= 23.Bg2 e4 24.f3 Be5?? (better is 24...Bf5+=) 25.Re7+- Kd8 26.Re6 Bg3 27.Ke2 a5 (27...ef3 28.Kf3 Bc7+-) 28.Rg6 (28.Rg6 Kd7 29.Rg3 ab4 30.Bb4+-) 1–0. Farkas,Miso – Milenkovic,Stojko (2125), Vojvodina Cup, 2008.

5.c4 f5 6.d4 Ne7=.

5.c4 f5 6.Nf3 Ne7 7.c5 0-0 8.Qb3 Kh8 9.Ng5 (9.h4 h6 10.h5 g5+=) 9...Qe8 (better 9...d5!?=) 10.h4 dc5 11.bc5 (better 11.h5!? h6 12.Nc3+/-) 11...Na6= 12.Qc4 Nc6 13.Nc3 Na5 14.Qa2 Nc5 15.Be2 White plans h5 15...Nab3 Black intends e4 16.Rd1 Na5 (better 16...Qc6!?-/+) 17.h5= Ne6 18.Nf3 e4 19.hg6 (19.h6 ef3 20.hg7 Ng7 21.Bf3 Be6+=) 19...Qg6 (better 19...ef3!? 20.Rh7 Kg8 21.Bf3 Qg6=+) 20.Nh4+= Qf7 (better 20...Qg5!?+=) 21.Nd5+/- Kg8?? (21...Bd7 22.Ne7! Bb2 (22...Qe7 23.Ng6 Kg8 24.Ne7 Kf7 25.Nf5+-) 23.Qb2 Qf6 24.Nhg6 Kg7 25.Nf5 Kg6 26.Rh6 Kf5 27.g4 Kg5 28.Rf6 Rf6 29.Qe5 Kg6 30.Qa5 Raf8 31.Qh5 Kg7+-) 22.Nf5!+- Qg6 (22...Qf5 23.Ne7 Double attack (23.Ne7 Decoy)) 23.Nde7 (23.Nde7 Kf7 24.Ng6+-) 1-0. Superfish (2260) - drunz1997 (2140), Rated Blitz game, lichess.org, 2016.

5.c4 f5 6.Nf3 Nf6 7.d4 e4 8.Nfd2 0-0 (8...a5 9.b5=) 9.Nc3 (9.Be2 a5=) 9...Kh8 (9...a5 10.Be2=) 10.Be2+= c6 (10...c5 11.0-0+=) 11.Qc2 Na6 12.c5 (12.0-0 Be6+=) 12...d5 (12...dc5 13.dc5 b6 14.Rd1+=) 13.b5 (13.Ba6 ba6 14.Qa4 Qc7+=) 13...Nc7 14.a4 (14.bc6 bc6 15.Qa4 Qd7=) 14...Ne6 (14...f4 15.0-0=) 15.g3 (15.0-0 f4=) 15...g5 16.h4 f4 (better is 16...g4=) 17.0-0-0?? (17.hg5 fe3 18.fe3 (< 18.gf6 ed2 19.Qd2 Qf6–/+) 18...Ng5 19.bc6 bc6 20.Qd1=+) 17...fe3 (17...f3 18.Bf1 g4 19.Re1–/+) 18.fe3 Bh6 (18...g4!?–/+) 19.hg5 Bg5 20.Nde4? (better is 20.Nf1=+) 20...de4–+ (< 20...Ne4 21.Ne4 Be3 22.Kb1+=) 21.Ne4 Be3 22.Kb1 Nd5 23.Rh7 Kh7 24.Ng5 Kh6 25.Rh1 Kg5 26.Rh5 Kf6 27.Qf5 Ke7 28.Rh7 (28…Ng7 29.Rg7 Ke8 30.Qg6 Rf7 31.Qf7#) 1–0. Steffens,Olaf (2320) – Wilde,Dennis (2120), Schleswig Holstein–ch masters, 1997.

5.c4 Nf6 6.d3 0-0 7.Be2 Nc6 8.Nd2 Ne8 (8...Qe8 9.Ngf3=) 9.b5 Ne7 10.e4 (10.Ngf3 Nf6=) 10...f5 11.ef5 (11.Ngf3 Nf6=) 11...gf5 (11...Nf5 12.Ngf3=+) 12.Qc2 Ng6 13.g3 Nf6 14.h3 f4 15.g4 Nh4 (15...a6 16.Ngf3=) 16.Rh2 b6 (16...a6 17.Ngf3 Nf3 18.Bf3=) 17.Ngf3+= Ng6 18.g5 Nd7 19.h4 Bb7 (better 19...Nc5!?+=) 20.h5+/- Ne7 21.Ne4 (better 21.d4!?+/-) 21...Nf5 22.Rg2 Nd4 (22...a6 23.g6+=) 23.Bd4 ed4 24.Kd2?? (better 24.h6 Be5 25.g6 Be4 26.de4 hg6 27.Rg6 (worse 27.Ne5 Ne5 28.Bf1 Qh4-/+) 27...Kh7 28.Rg4+=) 24...Be4-+ 25.de4 (25.g6 h6 26.de4 d3-+) 25...d3! 26.Qd3 White launches an attack (26.Kd3 Decoy to d3 26...Nc5) 26...Ba1 27.Qd5 Kh8 28.g6 Bg7?? (28...hg6 29.hg6 Kg7 30.Ng5-+) 29.Ng5? (better 29.h6 Qe7 30.Qg5-/+) 29...Qe8?? (better 29...f3 30.Bf3 Ne5-+) 30.Nf7+- Rf7 31.gf7 Qf8 32.h6! Bh6 (32...Be5 33.Rg8 Qg8 34.fg8Q Rg8 35.Qf7+-) 33.Rg8 A double attack 33...Qg8 34.fg8Q Rg8 35.Qe6 f3 36.Qh6 fe2 37.Ke2 (37.Qe6!? Ne5 38.Qf6 Rg7 39.Qd8 Rg8 40.Qc7 Rg7 41.Qd8 Rg8 42.Qf6 Rg7+-) 37...Re8 38.Ke3 Nc5 39.f3 Kg8 40.Qg5 Kf8 41.Qf5 Kg8 42.Qd5 Kg7 43.Qc6 Re7 44.Qa8 h5 (44...Na4 45.Kd2+-) 45.Qc8 (45.Qa7 Rf7+-) 45...Kg6? (better 45...Rf7+-) 46.Qf5 Kg7 47.Qh5 (47.Qg5 Kf8+-) 47...a5 48.ba6 (48.Qg5 Kf8+-) 48...Na6 49.Qg4 Kf7 50.Qf5 Kg7 51.Kd4 c6? (51...Nc5+-) 52.Qc8 Nc7 53.Qd8 (better 53.Qb8 b5 54.Qb6 Ne6 55.Ke3 bc4 56.Qc6+-) 53…Ne6-+ (53...Ne6 54.Ke3 Nd8-+) 0-1. petrobbo (2010) - johnpolanyk (2030), ChessWorld.net, 2019.

5.c4 Nf6 6.d3 0-0 7.Nf3= Nc6 (7...a5 8.b5=) 8.Nbd2 a5 (8...Bf5 9.Be2=) 9.b5 Nb8 10.Be2 Re8 11.a4 (11.0-0 Nbd7=) 11...Nbd7 (11...Qe7 12.0-0=) 12.0-0 Nc5 13.d4 ed4 14.ed4 Nh5 15.g3 Bg4 (15...Bf5 16.Ra3=) 16.Re1 Ne6 17.Nf1 Nf6 18.Ra3 (18.Ne3 Bh3=) 18...Ne4 19.Re3 Nf6 (19...d5 20.Ne5 Be2 21.R3e2=) 20.h4 (20.d5 Nc5+=) 20...h6 (20...Bh6 21.Rb3=) 21.Qa1 (21.d5 Nc5=) 21...d5 22.Ne5 Be2 23.R3e2 dc4 24.Nd2 Qd5 25.Ndc4 h5 (25...Ra7 26.Bc3=) 26.Ne3 Qd6 27.d5 Nc5 (27...Nd5 28.Rd1 c6 29.bc6 bc6 30.Nc6+=) 28.N5c4 Qd8 29.Rd1 Nce4 30.d6 (30.Be5 Nc5+=) 30...cd6+/– 31.f3 Ng3 32.Rg2 d5 33.Rg3 Qc7 34.Be5 Ne4? (better is 34...Qc5 35.Bd4 Qc7+/–) 35.Bc7+- (35.fe4?! Re5 36.b6 Qe7 37.Ne5 Be5 38.Rg6 fg6=) 35...Ba1 36.fe4 1–0. Cirulis,Ilmars (1840) – Duttagupta,Aniruddha (2000), FICGS, 2015.

5.c4 Nf6 6.d3 a5 7.b5=.

5.c4 Nf6 6.Ne2 =+.

5.c4 Nf6 6.Nf3 0-0 (6...e4 7.Nd4=) 7.d4 Nbd7 (7...e4 8.Nfd2=) 8.Nc3 (8.Be2 ed4 9.Bd4 a5=) 8...Re8 (8...a5 9.Bd3=) 9.Be2 e4 (9...a5 10.0-0=) 10.Nd2+= Nf8 (10...c5 11.0-0+=) 11.g4 (11.0-0 a5+=) 11...h6 12.Rg1 (12.h4 N8h7+=) 12...c6 (12...c5=) 13.d5 (13.h4!?+=) 13...cd5=+ 14.cd5 (14.g5 hg5 15.cd5 g4=+) 14...Nd5 15.Nd5 (15.Nde4 Nc3 16.Nc3 Qh4=+) 15...Bb2–/+ 16.Rb1 Bg7 (< 16...Ba3 17.Nc4+/–) 17.Qc2 (17.Rc1 Rb8–/+) 17...Be6 (17...Re5 18.Nc7 Rb8 19.g5–/+) 18.Nc7 (18.Qe4 Bf5! 19.Qe8 Qe8 20.gf5 Qe5=+) 18...Rc8–+ 19.Ne6 Ne6 (19...Re6 20.Qa4–+) 20.Qa4 (20.Qe4 d5 21.Qf3 Ng5–+) 20...d5–+ 21.Qa7 d4 (better is 21...Qc7 22.Qa5 Qh2–+) 22.Bc4? (better is 22.Ne4!? de3 23.Qe3–+) 22...de3 (22...Qc7 23.g5 Ra8 24.Qa8 Ra8 25.gh6 de3 26.fe3–+) 23.Qe3 Bd4 24.Qh6 e3 (25.fe3 Bc3–+) 0–1. Steffens,Olaf (2315) – Machelett,Heiko (2355), Oberliga Nord N, 1997.

5.Bc4 Ne7 6.Ne2 0-0 7.0-0 Nbc6 8.f4 d5 9.Bb3 Bg4 10.fe5 Ne5 11.Nbc3 Nc4 12.Bc4 dc4 13.h3 Be2 14.Qe2 b5 15.Rab1 c6 16.Ne4 f5 17.Bg7 Kg7 18.Nc5 Qd6 19.d3 cd3 20.cd3 Rae8 21.e4 Nd5 (21...fe4!? 22.Qb2 Kh6 23.de4 Rd8+/-) 22.Qb2+- Nf6 23.ef5 gf5 24.Rf5 Kg6 25.Rbf1 Nd5? (better 25...Qe7+-) 26.Ne4 Qe7 27.Rg5 Qg5 (27...Kh6 28.Rf8 Rf8 29.Qc1+-) 28.Ng5 Rf1 29.Kf1 Kg5 30.Qd4 (better 30.Qg7 Kf5 31.Qf7 Nf6 32.g4 Ke5 33.d4 Kd4 34.Qf6 Re5 35.Qc6+-) 30...Rf8 31.Kg1 Rf7 32.Kh2 h5 33.Kg3 Rf4 (33...Re7 34.Qc5 Re3 35.Kh2+-) 34.Qg7 (34.Qe5 Kg6 35.Qe8 Rf7 36.Qc6 Nf6 37.Qb5 Rd7+-) 34...Kf5 35.Qh7 (35.Qd7 Ke5 36.Qc6 h4 37.Kh2 Rd4 38.Qb5 Kf4+-) 35...Kg5 (35...Ke6 36.Qh5 Rf6 37.Qe8 Ne7 38.Qa8+-) 36.h4! Kf6 (36...Rh4 37.Qg8 Deflection (37.Qg8 Decoy; 37.Qa7 Zwischenzug)) 37.Qh5 Rf5 38.Qh6 Ke5 (38...Kf7 39.Qc6 Ne7 40.Qe4+-) 39.Qc6 Kd4 40.Qc5 Kd3 41.Qb5 Kd4 (41...Ke4 42.Qa6+-) 42.Qc5 (42.Qc5 Ke4 43.Qa7+-) 1-0. FeegLood (2715) - bigsotos2420 (2550), lichess.org, 2016.

5.Nf3 (--> 4.Nf3 d6 5.e3).

5.g4 Bd7 6.Bg2 Bc6 (6...Nc6 7.c4=+) 7.Bc6 (7.Nf3 Qd7 8.h3 Ne7=) 7...Nc6=+ 8.Qf3 (8.b5 Nce7=+) 8...Nge7 (8...h5 9.gh5 Rh5 10.b5=) 9.Qg2 (9.Nc3 d5=+) 9...Qd7 10.Ne2 h5 (10...0-0-0 11.f4=+) 11.g5 h4 12.h3 d5 13.d3 a5 (13...0-0-0 14.0-0=+) 14.b5= Nd8 15.a4 (15.c4!?=) 15...Ne6=+ 16.Nd2 (16.Ra2!?=+) 16...Rh5–/+ 17.f4 (17.Qg4 Rg5 (17...Ng5?! 18.Qd7 Kd7 19.f4–/+) 18.Qh4 Nf5–+) 17...Nf5 18.Nf1 ef4 19.Bg7 Rg5 (19...Neg7 20.Nf4 (worse 20.ef4 Qd6–/+) 20...0-0-0 21.Nh5 Nh5 22.Qd2+=; 19...Nfg7?! 20.ef4 Qe7 21.Kd1=+) 20.Qf3 Nfg7 21.ef4 Rh5 22.Ne3 Qd6 (22...0-0-0 23.0-0–+) 23.Ng4 (23.c4!?–/+) 23...0-0-0–+ 24.0-0 (24.c3 d4 25.Nf6 Rf5–+) 24...Nf5 25.Rf2 (25.Rae1 Qc5 26.Rf2 Qc2–+) 25...Ng3! 26.Re1 (26.Ng3 hg3 Passed pawn) 26...Ne2 27.Ree2 (27.Qe2 Nf4 28.Qf3 Ne6–+) 27...Nd4 28.Qe3 Ne2 29.Re2 Kb8 30.Qd4 Rf5 31.Rf2 (31.Re5 Qa3 32.Ne3 Qc1 33.Kg2 Re5 34.fe5 Qd2 35.Kg1 Re8–+) 31...g5 32.fg5 (32.c4 Rf4 33.Rf4 gf4–+) 32...Qg3 (better 32...Re8 33.Ne3 Qg3 34.Rg2 Qe1 35.Kh2 Re3 36.Qh8 Re8–+) 33.Rg2 Qe1 (33...Qh3 34.Nf2 Qf3 35.Qh4–+) 34.Kh2 Rf1 (34...Re8 35.b6 cb6 36.Rg1–+) 35.Nf2 b6 (35...Re8 36.Qf6 Re2 37.Qh8 Ka7 38.Qh4 Rff2 39.b6 Ka6 40.Qf2 Rf2 41.Rf2 Qf2 42.Kh1 Kb6 43.c4 Qe1 44.Kg2 Qd2 45.Kh1 Qd3 46.cd5 Qd5 47.Kg1 Qg5 48.Kf2 Qh4 49.Kg2–+) 36.c4 (36.Qf6 Rd6 37.Qh8 Kb7 38.Qh4 Rh1 39.Kg3 Qe3 40.Kg4 Ra1–+) 36...Qe6 (36...Re8!? 37.Qf6–+) 37.c5 bc5 (37...Rg8 38.Qh4 Qe5 39.Qg3 Qg3 40.Kg3 Rg5 41.Kf3 Rg2 42.Kg2–+) 38.Qh4 c4 39.d4 (39.dc4 dc4 40.Qg4 Qd6 41.Qg3 Qc5–+) 39...Qd6 (39...Rg8 40.Qg3–+) 40.Qg3 Qg3 41.Kg3 Re8 (41...Rg8 42.h4 f6 43.Kg4–+) 42.Ng4 Re4 43.Ne5 (43.Rd2 Ra1–+) 43...Kb7 44.Nc6 Rd1 (44...Kb6!? 45.Kh2–+) 45.Rf2 (better 45.Na5 Kb6 46.Nc6–+) 45...Rd3 (better 45...Rg1 46.Kh2 Rg5 47.Rf7 Re2 48.Kh1 Re3–+) 46.Kg2=+ c3 47.Na5 (47.g6 Rd2 (47...fg6?! 48.Rf8 Rd2 49.Kf3 Rd3 50.Kg2 Rd2 51.Kf3 Rd3 52.Kg2=) 48.g7 Re8 49.Na5 Kb6–+) 47...Kb6–+ 48.Nb3 c2! 49.Nc1 (49.Rc2 Rb3 Discovered attack) 49...Rc3 (49...Rdd4 50.Rc2 Ra4 51.Rc6 Kb5 52.Rc7–+) 50.Rf7 Re1 (50...Rd4 51.g6 Re3 52.g7 Rd2 53.Rf2 Rf2 54.Kf2–+) 51.Rf1 Rf1 (51...Rg3 52.Kf2 Rd1 53.Re1 Rh3 54.a5 Ka5 55.Na2–+) 52.Kf1 Rh3 53.Ke2 (53.Ke1 Ka5 54.Kd2 Rh2 55.Kc3 Ka4–+) 53...Ka5 54.Kd2 Rh2 55.Kc3 Ka4 56.g6 Rg2 (worse 56...Kb5 57.Nd3 Rg2 58.Kb3–+) 57.g7 (57.Nd3 Kb5 (worse 57...Rg6 58.Kc2 Kb5 59.Nf4–+) 58.Kb2 Kc4–+) 57...Kb5 58.Nd3 Rg7 59.Kc2 0–1. Basman,Michael J (2310) – Shabalov,A (2560), London Classic Superrapid, 2016.

5.g4 Nf6 6.g5 Nh5 7.h4=+.

5.c4 0-0 6.Nc3 b6 7.Nf3 Bb7 8.Be2 a6 9.Qc2 a5 10.b5 d5 11.Nd5 Nd5 12.cd5 Bd5 13.0-0 Nd7 14.Rac1 Rc8 15.Qb1 Nc5 16.d4 1–0. combijack (1795) – junkie43, gameknot.com, 2012.

5.c4 0-0 6.Nc3 d6 7.Nge2 c6 (7...Be6 8.d3=+) 8.d4= f5 9.de5 de5 10.Qc2 Be6 11.Ng3 Nd7 12.h4 (12.Be2 f4 13.Nf1 Nf5=+) 12...Nf6 (12...a5 13.h5 ab4 14.ab4 Ra1 15.Ba1=+) 13.h5 f4 14.Nge4 (14.Rd1 Qc7 15.Nge4 Nh5=) 14...fe3=+ 15.fe3 Nf5 (15...Nh5 16.Be2=+) 16.Ng5 (16.hg6 Ne4 (worse 16...hg6 17.Nc5 Bc8 18.Rh3=) 17.gh7 Kh8 18.Ne4 Ne3-+) 16...Qe7 (16...Ne3 17.Qe2 Nf1 (worse 17...Bc4 18.Qe3 Bf1 19.Rf1+/-) 18.Ne6 Qe7 19.hg6 Ng3-/+) 17.hg6+= h6 18.Ne6 Qe6 19.Rh3 Ng4 20.Qe2 Qg6 21.0-0-0?? (21.c5 e4 22.Nd1 Ne5=+) 21...Rad8?? (better 21...Nge3 22.Re1 Nd4-+) 22.Rd8= Rd8 23.c5? (23.e4 Nd4 24.Qe1 Rf8=+) 23...h5 (better 23...Nge3 24.Re3 Qg5-+) 24.Nd1 Kh8 25.Nf2 (25.Qe1 Bh6 26.Bc3 Nd4 27.Bd4 ed4-/+) 25...Nge3= 26.Qh5 (worse 26.Re3 Bh6 27.Be5 Kh7-/+) 26...Qh5 27.Rh5 Kg8 28.Bd3 Nd4 29.Kd2 (29.g4=) 29...Nd5?? (29...Ng2!? 30.Bc4 Kf8-/+) 30.Bc4 (30.Bd4 ed4 31.Bc4 Kf7+/-) 30...Kf7 (better 30...Kf8!?=) 31.Bd4+/- ed4 32.Kd3 (32.g4 Ke7 33.Bd5 Rd5 34.Rd5 cd5+/-) 32...Bf6 (32...Kg6 33.Rh4=) 33.Ne4 (better 33.g4+/-) 33...Ke6?? (33...Kg6 34.Rh1 Nf4 35.Kd2 A) worse 35...Ng2 36.Rg1 Kf5 37.Ng3 (37.Nf6 Ne3 38.Bd3 Kf6=+) 37...Kg4 38.Rg2+-; B) 35...Be5=) 34.Rh6+- Rf8 35.Bd5 (35.Nf6 Rf6 36.Bd5 Kf5 37.g4 Kg5 38.Rf6 Kf6 39.g5 Kg5 40.Bc6 Kf5 41.Bb7 Ke5+-) 35...cd5 36.Rf6 Rf6 37.Nf6 Kf6 (37...Ke5 38.Ng4 Ke6 39.b5+-) 38.Kd4 Ke6 39.g4 a6 40.g5 (40.g5 a5 41.ba5+-) 1-0. blitzbullet (2475) - TheFinnisher (2465), Rated Blitz game, lichess.org, 2020. (=1.a3 e5 2.b4 g6 3.Bb2 Bg7 4.e3)

5.c4 0-0 6.Nc3 d6 7.h3 c6 (7...a5 8.b5=+) 8.Nf3= b6 (8...e4 9.Nh2=) 9.d4 ed4 10.Nd4 Re8 (10...a5 11.Bd3=) 11.Bd3 (11.Be2 Nf5 12.Nf5 Bf5=) 11...Bd4 12.ed4 Nf5 13.Ne2 Qf6 (13...d5 14.0-0=) 14.0-0+= d5 15.Rb1 (15.cd5 cd5 16.Qb3 Be6+=) 15...Bb7 (15...Be6 16.c5+=) 16.c5 (16.cd5 cd5 17.Qa4 Re7+=) 16...b5 (16...Ba6!?=) 17.a4 (17.Re1 Na6+=) 17...a6 (17...Ba6 18.a5+=) 18.ab5 (18.Re1!?+/–) 18...ab5+= 19.Ra1 Nd7 (19...Ra1 20.Qa1 Na6 21.Qa3+=) 20.Re1 Ra1 21.Qa1 Ra8 22.Qc1 Kg7 23.Nf4 h5 24.Bf5 Qf5+= 25.Re7 Kf8 26.Qe1 Rd8 27.Bc1 Bc8 28.Qe2 Nf6 29.Rc7 Bd7. thedesertfox (1900) – dovlov (1830), net–chess.com, 2005.

5.d3 0-0 6.Nd2 d6 7.Be2 f5 8.Ngf3? (8.c3 Be6=) 8...h6 (8...e4 9.Bg7 ef3 10.Bf8 fe2 11.Qe2 Qf8 12.0-0-/+) 9.c4 (9.Rb1 Be6=) 9...Nd7 (better 9...e4!? 10.Bg7 ef3 11.Bf8 fe2 12.Qe2 Qf8-/+) 10.0-0+= Nf6 11.Re1 Be6 12.Nf1 c6 13.Ng3 Nd7 14.Qc2 Qc7 15.a4 White plans b5 15...a5 16.b5 c5 17.Rac1 b6 18.d4 e4 19.Nd2 d5 20.dc5 Nc5 21.Bg7 Kg7 22.cd5 Bd5 (worse 22...Nd5 23.Nb3+/-) 23.Qb2 Kh7 24.Qa3 Rac8 25.Red1 Rfd8 26.h4 h5 27.Ndf1 Qe5 28.Bh5? (better 28.Nd2-/+) 28...gh5-+ 29.Nh5 Bf7 30.Nf4 Nd5 31.Nd5 Rd5 32.Ng3 Rcd8 33.Rd5 Rd5 (33...Bd5?! 34.Rc5 bc5 35.Qc5-/+; 33...Qd5?! 34.Qc3 Qe6 35.Ra1-+) 34.Ne2 Rd3 35.Qa1 Qa1 36.Ra1 Nb3 37.Rb1 Rd2 38.Nf4 Nc5 39.Rc1 Na4 (better 39...Bb3!? 40.f3-+) 40.Rc7 Kg8 41.h5 Rd1 42.Kh2 Rd6 43.Kg3 Nc5 44.Kh4 Ne6 45.Ra7 (45.Ne6 Be6 (worse 45...Re6 46.Kg5-/+) 46.Kg5 Bd7-+) 45...Nf4 46.ef4 Bc4 47.Kg5 Bb5 48.h6?? (48.Kf5 Rd7 49.Ra8 Kh7 50.g4-+) 48...Be8 (better 48...Bd7 49.g4 Kh7 50.gf5 Rd5-+) 49.Kf5? (better 49.Ra8 Re6 50.Kf5=+) 49...Rh6-+ 50.Ra8 Kf8 51.Ke4 a4 52.g4 b5 53.g5 (53.f5 b4 54.Kd3 Ra6-+) 53...Rb6 54.f5 (54.Kd3-+) 54...b4 55.g6 b3 56.Ke5 b2 57.f6 b1Q 58.g7 Kf7 59.Re8 Kg6 (59...Qb5 60.Kf4 Rf6 61.Ke4 Qe8 62.Kd5 Qb5 63.Ke4 Qc4 64.Ke3 Re6 65.Kf3 Qe4 66.Kg3 Rg6 67.Kh3 Qh1) 60.g8Q Kh6 (60...Kh5 61.Qh8 Kg5 62.Rg8 Qg6 63.f4 Kg4 64.Rg6 Kf3 65.Qh3 Ke2 66.Rg2 Kd1 67.Qh1) 61.Qg7 (61.Qg7 Kh5 62.Rh8 Qh7 63.Rh7) 1-0. azer3136 (2290) - botvinnik1999 (2215), Rated Blitz game, lichess.org, 2016.

6.d4 Nd7 7.Bc4 0-0 8.h4 (8.de5 Nc6=) 8...c6 (8...e4 9.Nfd2=+) 9.h5= d5 10.Bb3 e4 11.Nfd2 Nf6 12.hg6 fg6 13.c4 Kh8 14.Nc3 Be6 (14...Ng4!? 15.Rf1 a6=) 15.cd5+/- Bd5 16.Qc2 Qd7 17.Na4 (better 17.Nde4!? Ne4 18.Ne4+/-) 17...Qf5 18.Nc5? (better 18.Bd5 Ng4 19.Rf1 cd5 20.Qc7=+) 18...b6-+ 19.Na4 (19.g4 Ng4 (19...Qg4?! 20.Na6-+) 20.Nce4 Nf2-+) 19...Ng4 20.Rf1 Nf2 0-1. FeegLood (2605) - feartheerny (2335), Time forfeit, 2016.

6.Be2 0-0=.

6.e4 f5 7.ef5 Bf5=.

7.Nc3 a5 8.d4=.

7.Nc3 f5 8.d4 e4 9.Nd2 Nd7 (9...c5 10.Nb3=) 10.Qb3 (10.Be2 Nc6+=) 10...Nf6 (10...c5 11.Nb5 Nf6 12.bc5 dc5 13.dc5+=) 11.Be2+= h6 (11...Be6 12.0-0+=) 12.f3 (12.0-0 d5+=) 12...f4 (12...ef3 13.Bf3 Ng4 14.Ne2+=) 13.Nce4+= Nf5 14.Nf1 Ne4 (14...fe3 15.Neg3+=) 15.fe4 Qh4 16.Kd1 Ng3 17.hg3 (17.Ng3 fg3) 17...Qh1–/+ 18.gf4 Qg2 (18...Bg4 19.Ke1 Be2 20.Ke2 Qg2 21.Kd3–/+) 19.Nd2 h5 (19...Be6!?=+) 20.c5= Kh7 21.Nf3 Bg4 22.Ng5 Kh6 23.Bg4 Qg4 24.Kd2 Bf6 25.Ne6+= Rf7 26.e5 de5 27.de5 Rd7 28.Bd4 Bh4–/+ 29.Kc3 Re8 30.c6= bc6 31.Nc5 Rd5 32.Qa4 Rd4? 33.ed4 Qf4+= 34.Qc6 Qe3 35.Kc4+= Qe2 36.Kb3 Re7 37.Ka4 Qc2= 38.Kb5 Qe2 39.Ka4 Qc2 40.Kb5 Qe2 41.Ka5 Qb2 42.Rg1 Qa3 43.Kb5 Rg7 44.Qe4 Be7=+ 45.e6 c6 46.Qc6 Bc5 47.Qc5 Qd3 48.Kc6= Qa6 49.Kd5 Qa2 50.Qc4 Qf2 51.Qf1 Qa2 52.Ke5 a5 53.Rg2 Qb3 54.Qf4 Kh7+= 55.d5 ab4 56.d6 Ra7 57.Re2?? Ra5–+ 58.Kf6 Qc3 59.Re5= Re5 60.Qe5+= Qf3 61.Ke7 Kg8 62.Qf6 Qb7 63.d7 b3 64.Qg6 Kh8 65.Kf7 (65...Qf3 66.Ke8 Qc6 67.Qh5 Kg7 68.Qg5 Kh7 69.Ke7 Qa8 70.Qh5 Kg7 71.Qg4 Kh7 72.Kf7 Qf8 73.Kf8 Kh6 74.d8Q b2 75.Qdh4) 1–0. Steffens,Olaf (2330) – Ashby,Ann Marie (2090), Hastings Masters, 1995.

7.d4 a5 8.Nbd2=.

7.d4 e4 8.Nfd2 f5 9.Be2 Nd7 (9...d5 10.0-0=) 10.0-0+= Nf6 11.Nc3 g5 (11...d5 12.Qc2+=) 12.a4 (12.f3 d5+=) 12...Ng6 (12...c5 13.Qb3+=) 13.b5 Qe7 14.Qc2 h5 (14...c5 15.bc6 bc6 16.Rae1+=) 15.Rfc1 (15.Nd5 Nd5 16.cd5 h4+/–) 15...h4 16.Ba3 (16.Nd5 Qf7+/–) 16...Re8 (16...h3!?=) 17.Nd5+/– Qf7 (17...Qd7 18.Nf6 Bf6 19.c5+/–) 18.a5 (18.Nf6 Qf6 19.c5 h3+/–) 18...c6 (18...h3 19.b6 cb6 20.ab6 Nd5 21.cd5+/–) 19.Nf6+/– Qf6 20.a6 g4 (20...h3 21.Qa4+/–) 21.Rab1 cb5 22.cb5 d5 23.ab7 Bb7 24.Qc7 Bc8 25.Rc6 Be6 26.Bc5 Kh7 27.Ra6 Rac8 28.Qa7+- f4 29.b6 fe3 30.fe3 g3 31.Rf1 Qg5–/+ 32.hg3?? Qe3–+ 33.Kh1 hg3 34.Rf4 Nf4 35.Ra1 Ne2 36.b7 Qh6 0–1. Dvoretska,Olena – Berdiugina,Elena (2100), UKR–ch U16 Girls, 2002.

7.d4 Bf5=.

5.b5 Nd4 6.Nd4 ed4 7.e3 +=.

5.c4 d6 6.e3 Bf5 7.Be2 Qd7 8.d3 0-0-0 9.Qa4 a6 (9...Kb8 10.b5 Nce7 11.0-0=) 10.Nc3 Nge7 11.h3 (11.b5 Nb8+/–) 11...h5 12.Ng5 Be6 (12...Rhf8 13.b5 Nb8 14.e4+/–) 13.b5+/– Nb8 14.Ne6 fe6 15.Qb3 d5 16.cd5 Nd5 (16...ed5 17.Rb1+/–) 17.ba6 Na6 18.Bf3 (18.Rc1+/–) 18...e4? (better is 18...Nc5!? 19.Qc4 e4 20.Qc5 Nc3 21.Bc3 ef3 22.Bg7 Qg7+=) 19.Be4 (better is 19.Ne4 Bb2 20.Qb2+-) 19...Nc5+/– 20.Qc2 Ne4 21.Ne4+= Bb2 22.Qb2 b6? 23.a4?? Ne7? 24.d4 Qd5 25.f3 Nf5 26.a5 ba5 27.Rb1 Qa8 28.Qb3 a4?? 29.Qe6 Rd7 30.Nc5 Qd5 31.Rb8!! Kb8 32.Nd7 Qd7 33.Qd7 Ne3 34.Qb5 Ka7 35.Qa4 Kb6 36.Qb3 Kc6 37.Qe3 Kd7 38.0-0 Re8 39.Qg5 c6 40.Qg6 Re6 41.Qf5 Ke7 42.Qc5 Rd6 43.Re1 Kd7 44.Re5 h4 45.Re8! Rd5 46.Qe7 1–0. Rempeli,Alexander – Schwarz,David, Wuertemberg–ch U12, 2004.

5.e3 a6 6.c4 d6 7.d4 Bg4 8.d5 Na7 9.Nbd2 b5 10.Bd3 Nf6 11.Qc2 0-0 12.Rc1 Qe8 13.cb5 Nb5 14.Qb3 Bf5 15.Bf5 gf5 16.0-0 Rc8 17.Rc6 Na7 18.Ra6 Nb5? 19.a4 Ng4 20.ab5 Qb5 21.Ra5 Qe2 22.h3 Nf6 23.Re1 1–0. arkadeles (2260) – Bren, ChessWorld.net, 2003.

5.e3 d6!?=.

5.e3 Nge7 6.b5+/– Na5 7.Ne5 (7.Bc3 c5 8.Ne5+/–) 7...c6 (better is 7...d6!? 8.Nc4 Bb2 9.Nb2 Be6+/–) 8.Nc6 Nac6 (better is 8...Bb2 9.Nd8 Ba1+-) 9.Bg7 Rg8 10.Bf6 (10.bc6?! Rg7 11.cb7 Bb7+-) 10...Na5 11.Nc3 a6 (11...d5+-) 12.Nd5! d6 13.b6 Kd7 14.Be7 Qe8 15.Nf6 Ke7 16.Ne8 Ke8 17.c4 Bd7 18.Be2 Ke7 19.0-0 Rge8 20.Qc2 Kf8 21.d4 Bf5 22.Bd3 Bd3 23.Qd3 Rac8 24.Rac1 Rc6 25.c5 dc5 26.dc5 Rec8 27.Rc2 Rc5 28.Rc5 Rc5 29.Qd6 (29...Ke8 30.Qc5+-) 1–0. Vandenburg,V – Austin,J, East Lansing ch–MI opB, 1991.

5.c4 b6 6.e3 Bb7 7.d4 e4 8.Nfd2 f5 9.Nc3 a5 10.c5 (10.Be2 Nf6+=) 10...dc5 11.dc5 ab4 12.ab4 Ne7 (12...bc5!? 13.Ra8 Ba8+/-) 13.cb6 cb6 14.Ra8 Ba8 15.Qa1 Nd7 16.Nce4 Bb2 17.Nd6 Kf8 18.Qb2 Rg8 19.Bc4 Bd5 20.0-0 Ne5?? (better 20...Qc7 21.Nb5 Qe5+-) 21.Qe5 Bc4 22.Qf6 Bf7 23.Qf7 1-0. Adlai – Podloggy, internet, 2021.

5.c4 b6 6.e3 Bb7 7.Be2+= c5 (7...Nf6 8.0-0+=) 8.b5 (8.0-0 Nf6+=) 8...Nd7 (8...Nf6 9.d4=) 9.Qb3 (9.0-0 Ngf6+=) 9...Ngf6 (9...g5 10.d3=) 10.d3 0-0 (10...d5 A) < 11.Be5 dc4 12.Qc4 Bf3 13.Bf6 Qf6 (13...Bf6?! 14.Bf3 Ne5 15.Qe4=+) 14.Bf3 Qa1 15.Qe4 Be5–/+; B) 11.0-0 d4 12.Ne1=) 11.Nbd2 (11.0-0 Re8=) 11...Re8 12.0-0 Qc7 13.Rac1 (13.Qc2 a6=) 13...Rad8 (13...a6 14.ba6 Ra6 15.e4=) 14.Rfd1 h6 15.Ne1 (15.Re1 d5=) 15...Nf8 (15...d5 16.cd5 Bd5 17.Qc2+=) 16.Bf3+= d5 17.cd5 Nd5 18.d4 (better is 18.Qa4!?+=) 18...ed4=+ 19.Bd4 Bd4 20.ed4 Nf4 21.Rc4 N8e6 22.dc5= Nc5 23.Qc2 Ne2=+ 24.Be2 Re2–+ 25.Qc3? Qe7 26.Nc2 Ne4 27.Re4 Qe4! 28.f3 Qh4 29.Rf1 Rdd2 30.Ne3 Qg5 31.Ng4 Rg2 (32.Kh1 Rh2 33.Nh2 Qg2#) 0–1. Ranby,Hans – Kilpatrick,Robert, corr 3GMM½–04, 1998.

5.c4 b6 6.e3 Nf6 7.Be2 0-0 8.0-0 Nbd7 9.Nc3 Bb7 10.Qc2 Re8 11.Rfe1 Rc8 12.d4 e4 13.Nd2 d5 (13...Qe7!?+=) 14.cd5+/– Nd5 15.Nce4 Ne3?? (better is 15...Qe7+/–) 16.fe3+- Qh4 17.g3 (17.Bf3 Be4 18.Be4 c5+-) 17...Qh3?? (better is 17...Be4 18.Qa4 Qh3 19.Ne4 Re4+/–) 18.Bf3+- Ba8 19.Nf2 Qe6 20.Ba8 Ra8 21.Rac1 h5 22.e4 Qe7 23.e5 Qg5 24.Nf3 Qe7 25.Qc7 Bh6 26.Rc6 g5 27.Rh6 h4 28.Qd6 hg3 29.hg3 Qd8 30.e6 (30.e6 f6 31.ed7 Re1 32.Ne1+-) 1–0. Fournier,Frederic (1860) – Dumenil,Jean Francois (1740), FRA Ch (Team) N5 Mouy–Senlis, 2004.

5.c4 b6 6.e3 Nf6 7.d4=.

5.c4 Be6 6.Qc2 (6.e4 Nf6 7.Nc3 Nc6=) 6...f5 (6...a5 7.d4=) 7.d4 Nd7 (7...ed4 8.Nd4 Bd4 9.Bd4=) 8.de5 (8.e4 fe4 9.Qe4 c6+=) 8...Ne5= 9.Ne5 de5 (9...Be5 10.Be5 de5 11.Nd2=) 10.e4 c6 (10...Qh4 11.Qe2 fe4 12.g3=) 11.Nc3 Nf6 (11...Qf6 12.Rd1=) 12.Bd3+= f4 13.f3 (13.Rd1 Qc7=) 13...0-0 14.b5 (14.Rd1 a5=) 14...Rf7 (14...cb5 15.cb5 Rc8 16.0-0=) 15.Na4 (15.bc6!? bc6 16.Na4=) 15...cb5=+ 16.Nc5 Bc4 17.Be5? (better 17.Bc4 bc4 18.Qc4–/+) 17...Ne4!–+ 18.0-0-0 (18.Ne4 Qd5 Double attack (18...Be5 Discovered attack; 18...Bd3 Deflection; 18...Qd5 Decoy; 18...Bd3 Overloading); 18.Be4 Be5 Discovered attack; 18.fe4 Be5 Discovered attack) 18...Qe7 (18...Qa5!? 19.Bg7 Nc5 20.Bc4 bc4 21.Bb2 Nd3 22.Kb1–+) 19.Bc4 bc4 (19...Nc5?! 20.Bf7 Kf7 21.Bf4=) 20.Bg7 (20.Qe4 Be5 21.Rd5 Bg7 22.Qe7 Re7–+) 20...Nc5 (20...Kg7?! 21.Ne4 Qa3 22.Qb2 Qb2 23.Kb2=; 20...Qc5?! 21.Qe4 Kg7 22.Qd4 Qd4 23.Rd4–+) 21.Bb2 Nd3 22.Rd3 (22.Kb1 Nb2 23.Kb2 Rc8–+) 22...cd3 23.Qd3 Qe3 (23...Qe3 24.Qe3 fe3–+) 0–1. Quabach,Juergen (1935) – Pflug,Matthias (2210), Passau op 7th, 1999.

5.c4 Be6 6.e3 Nd7 (6...Nf6 7.d4=) 7.Nc3 (7.d4 e4 8.Nfd2 f5+=) 7...f5 (7...Ngf6 8.Be2=) 8.d3 (8.d4 e4 9.d5 Bf7+=) 8...h6 (8...Ngf6 9.Be2=) 9.Be2 (9.d4 ed4 10.Nd4 Bf7+=) 9...Ngf6 (9...a5 10.0-0+=) 10.Rc1 (10.0-0 0-0+=) 10...0-0 (10...a5 11.d4=) 11.0-0 (11.d4 e4 12.Nd2 a5=) 11...g5 (11...a5 12.b5=) 12.Nd2 f4 (12...a5 13.b5=) 13.ef4 (13.d4 c6+=) 13...gf4 14.Bf3 Rb8 (14...c6 15.Re1+=) 15.Nce4 (15.Re1 c6+=) 15...Qe8 (15...Ne4 16.Ne4 Qh4 17.Re1+=) 16.Re1 (16.Nf6 Bf6 17.Re1 Qf7+=) 16...Qg6 (16...Ne4 17.Ne4 Qg6 18.d4+=) 17.c5 (17.d4 Bf5+=) 17...d5 (17...Ne4!? 18.Be4 Qf7=) 18.Nf6+= Bf6 (18...Rf6 19.c6 bc6 20.Rc6 Qd3 21.Rc7 Rff8+/–) 19.Bh5 (19.c6 e4 20.Bf6 ef3 21.Qf3 Rf6 22.cd7 c6+/–) 19...Qd3 (19...Qf5 20.Nb3 c6 21.Qe2=) 20.c6+= bc6 21.Rc6 Bf5?? (better is 21...Rb6 22.Rc7 a6+=) 22.Be2+- Bg4 23.Bg4 Nb6 24.Rc7 (24...d4 25.Be6 Kh8 26.Qh5+-; 24.Be6 Kh8 25.Qh5 Qh7+-) 1–0. Aubertin,Tim – Meinhardt,Maximilian, Westpfalz op, 1998.

5.c4 f5 6.e3 Nf6 7.Qc2 Be6 (7...e4 8.Nd4=) 8.c5 (8.Be2 Nc6=) 8...Ng4 (8...Bd5 9.d4 e4 10.Nfd2=) 9.Bc4 Qe7 10.cd6 cd6 11.Be6 Qe6 12.Ng5 Qd7 13.Qb3 Bf6 14.f3 (14.Nh3 Nc6=) 14...Bg5 (14...Ne3 15.Qe3 f4 16.Qe4 Bg5 17.d4=+) 15.fg4=+ Nc6 (15...fg4 16.0-0=+) 16.Nc3 (16.gf5 gf5 17.0-0 Rc8=) 16...Ne7 (16...fg4 17.0-0=) 17.0-0 d5 (17...Rc8 18.gf5 gf5 19.Qd1=) 18.Na4+= Qd6 (18...Bf6 19.Nc5 Qc6 20.Rac1+=) 19.Nc5 b6 (19...b5 20.gf5 gf5 21.a4+/–) 20.Qa4+/– Kf7 21.Nd7 d4 (21...Bf6 22.gf5 Nf5 23.Nf6 Kf6 24.g4+-) 22.Qb3 Ke8? (better is 22...Nd5 23.Ne5 Qe5 24.Bd4 Qe4 25.Bh8 Rh8+/–) 23.Ne5!+- (23...Qd5 24.Qd5 Nd5 25.Bd4+-) 1–0. Basman,Michael – Hardy, Cambridge, 1980.

5.c4 f5 6.e3 Nf6 7.d4 ed4 8.ed4 0-0=.

5.c4 f5 6.e3 Nf6 7.d4 e4 8.Nfd2 0-0 9.Nc3 Nbd7 10.Qb3 c6 11.c5 d5 12.b5 Qe7 13.g3 Rf7 14.h4 Nf8 15.a4 h6 16.a5 g5 (better is 16...a6!? 17.bc6 bc6=) 17.hg5+/– hg5 18.a6 f4 19.gf4 gf4 20.ab7 Bb7 21.Rg1 a5 (21...Ne6!?+/–) 22.ba6+- Bc8 23.Be2 (worse is 23.ef4 e3 24.fe3 Qe3 25.Ne2 Qb3 26.Nb3 Ba6+/–) 23...fe3 24.fe3 Kh7 (24...Ng4!? 25.Nce4 Qh4 26.Ng3 Qh2+-) 25.Nf1 Bh6 26.Qb6 Qe6 27.Kd2 (27.Qb4 Rfa7+-) 27...Ng6 (27...Rfa7 28.Qb3+/–) 28.Kc2 (28.Kd1 Rfa7+/–) 28...Nh4 (28...Rfa7 29.Kd1+/–) 29.Ng3 (better is 29.Kd1!?+-) 29...Rg7 (worse is 29...Be3 30.Rh1 Bg5 31.Rh4 Bh4 32.Rh1+/–) 30.Raf1 (better is 30.Rh1 Rg3 31.Rh4+-) 30...Be3?? (30...Nd7 31.Qb3 Rb8+/– (31...Be3 32.Rh1 Rg3 33.Rh4 Bh6 34.Rfh1+-)) 31.Rf6!+- Bg1 (31...Qf6 32.Nh5 Double attack (32.Nh5 Decoy)) 32.Re6 Be6 33.Nh5 (33.Qc6 Ng2 34.Nce4 Ne3 35.Kc1 Rf8 36.Qe6 de4 37.Qe4 Kh8+-) 33...Rg6 (33...Re7 34.Qc6 Rc8+-) 34.Qb7 Kh6 35.Qa8 Bd4 36.Qf8 (36.Qf8 Kh7 37.Qe7 Kh8 38.Qh4+-) 1–0. Steffens,Olaf (2290) – Van Wessel,Rudy (2395), 31st ECC Open, 2015.

5.c4 Nf6 6.Nc3=.

5.d4 Nd7 6.de5 Ne5 7.Ne5 Be5 8.Be5 de5 9.Qd8 Kd8 10.Nd2 Be6 11.Rd1 Ke7 12.Nf3 f6 13.e3 Nh6 14.Nd2 Nf5 15.c4 Rhd8 16.c5 c6 17.Be2 Rd7 18.b5 (18.h4 h5=) 18...Rad8 (18...cb5 19.Bb5 Rc7 20.Rc1–/+) 19.a4 (19.bc6 bc6 20.Bf3 Nh4 21.Bc6 Rc7=+) 19...Nh4 (19...cb5!? 20.ab5 Rc7–/+) 20.Rg1= Bd5 (better is 20...cb5 21.ab5 Nf5=) 21.e4+- Be6 22.bc6 (22...bc6 23.g3+/–) 1–0. b4_player (2190) – woodenpawn, GameColony.com, 2003.

5.e3 Nc6 6.b5 Nce7 7.d4 e4 8.Nfd2 Nf6 9.c4 0-0 10.Nc3 Bf5 11.h3 h5 12.Be2 h4 13.g4 (13.Qc2!?+=) 13...hg3= 14.fg3 d5 15.g4 Be6 16.a4 c6 17.Ba3 Re8 (17...Qc7 18.bc6 bc6 19.Nf1=) 18.bc6 bc6 19.0-0 Qc7 (19...Bh6 20.Kf2=+) 20.Kg2 (20.Qe1 Rab8+=) 20...Nh7 (20...Rab8 21.Qc1=) 21.cd5 Nd5 22.Nd5 Bd5 23.Qe1 (23.Qc2 Qd8+=) 23...Bh6 (23...Ng5 24.Qg3 Qa5 25.Nc4 Qa4 26.Nd6=) 24.Qf2 Ng5 25.Nc4 Nf3 26.Nd6?? (better 26.Bd6 Qd7 27.Bc5=) 26...Re6-+ 27.Bf3?? (27.Kh1 Rd6 28.Bd6 Qd6 29.Bf3 ef3 30.Rg1-+) 27...ef3 (27...Rd6 28.Be2 Rdd8 29.Bc5+=) 28.Kg1 (28.Kh2 Be3 29.Qg3-+) 28...Be3 29.Nb5 (29.Qe3 Re3 30.Bc5-+) 29...Qg3 30.Kh1 0-1. Tejedor Fuente,Enrique (2425) - Pandey,Srishti (2025), Titled Tuesday (9), 2021.

5.e3 Nc6 6.c4 f5 7.Nc3 Nf6 8.d4 e4 9.Ng5 0-0 10.Be2 h6 11.Nh3 g5 12.Qb3 (12.Qc2 Re8=) 12...Ne7 (12...f4=) 13.f3 (better 13.Qc2!?=) 13...ef3=+ 14.gf3 (14.Bf3? g4-+) 14...f4 15.Nf2 (15.Ng1!?=+) 15...fe3-/+ 16.Ng4 (16.Nfe4 Nf5 17.Rd1 Nh5-/+) 16...Nf5-+ 17.0-0-0 (better 17.Nf6 Bf6 18.Nd5 Nd4 19.Bd4 Bd4 20.0-0-0-/+) 17...Ng4 18.fg4 Nd4 19.Rd4 Bd4 20.c5 Kh8 (20...Kh7 21.Qc2 Kh8 22.Rd1-+) 21.h4 (21.Nd5 Be5 22.Be5 de5-+) 21...gh4 22.Nd5 Be5 23.Be5 de5 24.Qe3 Qg5 25.Qg5? (better 25.Rh4 Qe3 26.Ne3-+) 25...hg5 26.Nc7 Rb8 27.Nb5 a6 (27...Rf4 28.Re1-+) 28.Nd6 Be6 29.Ne4 (29.Rh3 Rf4 30.Re3-+) 29...Bd5 30.Bd3 Be4 (30...Rf4 31.Re1 h3 32.Ng3-+) 31.Be4 Rf4 32.Bf5 a5! 0-1. Arifars17 (2485) - Santoyyy (2400), WEDDING ANNIVERSARY, lichess.org, 2021. (=1.a3 e5 2.b4 g6 3.Bb2 Bg7 4.e3 d6 5.Nf3)

5.e3 Nc6 6.d4 Bd7 7.de5 (better 7.b5!? Nce7 8.de5+/-) 7...Ne5= (worse 7...de5 8.b5 Nce7 9.Ne5+/-) 8.Ne5 de5 (worse 8...Be5 9.Be5 de5 10.Qd5+/-) 9.Be2 (9.Qf3 c6=) 9...Ne7 (9...Qe7 10.Qd5 0-0-0 11.Qa5=) 10.0-0 0-0 11.c4 Be6 12.Nc3 c6 13.Qc2 Bf5 14.e4 Be6 15.c5 Qc7 16.Nd1 Rad8 17.Ne3 h6 18.Bc4 Qc8 (18...Bc4 19.Nc4 b6 20.Rad1+=) 19.Rad1 Rfe8 (19...b5 20.cb6 ab6 21.Qb3+=) 20.Be6 (20.Rd6!?+-) 20...Qe6+/- 21.Nc4 Nc8 22.Na5 Qe7 23.Rd8 Rd8 24.Rd1 Kf8? (better 24...Rd1 25.Qd1 Qc7+=) 25.Rd8+- Qd8 26.Nb7 Qc7 27.Na5 Ke7? (27...Kg8 28.Nc4+-) 28.Nc4 (better 28.Qa4!? Kd7+-) 28...f6 29.Qd3 Qd7 30.Qd7 Kd7 31.f3 Ne7 32.Kf2 h5 33.Nd6 (33.g3 Nc8+-) 33...h4 (33...Nc8 34.Nb7+-) 34.h3 (34.g3 Nc8 35.Nc4 Bh6+-) 34...g5 (34...Bh6 35.Ke2+/-) 35.Ke3 (35.Bc1 Bf8+-) 35...Bf8 36.Nc4 Bg7 37.Kd3 Bf8 38.Ne3 (38.Bc1 Ng6+-) 38...Bg7 (38...Ng6 39.Kc4+/-) 39.Kc4 Bf8 40.Ng4 Bg7 41.Bc3 Ng6 42.Bd2 Ke6 (42...a6 43.a4+-) 43.Be3 (43.a4 a6+-) 43...Ne7 (43...a6 44.Nf2+-) 44.a4 (44.b5 cb5 45.Kb5 Kd7+-) 44…Nc8 (44...Nc8 45.b5 cb5 46.ab5 Bf8+-; better 44...a6+-). sezwho (2030) - FairTray (2100), Rated Bullet game, lichess.org, 2014.

5.e3 Nd7 6.d4 e4 7.Nfd2 f5 8.c4 Ngf6 9.Nc3 0-0 10.Qb3 c6 11.g3 (11.Be2 Nb6+=) 11...h6 12.Be2 Kh7 13.h4 b6 14.h5 g5 15.g4 f4 (better 15...Ng4!? 16.Bg4 fg4 17.Nce4 Qe7=) 16.Nce4 fe3 17.fe3 d5? (17...Ne4 18.Ne4 Qc7 19.Rf1+/-) 18.Nf6?? (better 18.Ng5 hg5 19.Qd3 Kg8 20.h6+-) 18...Nf6+= 19.0-0-0 (19.Rg1 Kh8+=) 19...Be6 (19...Bg4 20.Bg4 Ng4 21.Rhg1=+) 20.Rhg1 a5 21.b5 dc4 (21...Rc8 22.Kb1=) 22.Bc4 (22.Qc2 Kh8 23.bc6 b5+=) 22...Bc4 (22...Bg4 23.bc6 Bd1 24.Kd1 Nh5 25.Be2=) 23.Qc4 (23.Nc4!? Rc8 24.Kb1+=) 23...cb5= 24.Qb5 Rc8 (24...Ng4 25.Nc4 Nf2 A) 26.Qb6? Rc8 (26...Nd1?! 27.Qd8 Rad8 28.Kd1-/+) 27.Qg6 Kg8-+; B) 26.Rdf1=) 25.Kb1+= Nd5 26.Qd3 (26.Nc4 Rf3+=) 26...Kh8 27.Ne4 (27.Rgf1 Nf6+=) 27...Qe7= 28.Ng3 (better 28.Rdf1=) 28...Ne3?? (28...Qe3 29.Nf5 Qe6 30.Rge1=) 29.Nf5?? (better 29.Rde1 Rce8 30.Bc1+-) 29...Nf5=+ 30.gf5 Qf7 31.Rgf1 Bf6 (31...Qd5 32.Qf3 Qb5 33.Rf2=+) 32.Rf2 (32.Qb5 A) worse 32...Qh5 33.Rh1 (33.Qb6 Rb8 34.Qc6 Qe2-/+) 33...Qf3 34.Rh6 Kg7 35.Rg6 Kh8 36.Rf1 Qe4 37.Ka1+-; B) 32...Kh7=) 32...Rcd8 33.Re1 Rd5 34.Rfe2 (34.Qe4 Rfd8=+) 34...Rfd8 (34...b5!?-/+) 35.Re6=+ Bd4 Attacks the isolani on f5 (35...Kg7!?=+) 36.Rh6+= Kg8 37.Rg6 (better 37.f6 Bb2 38.Qg6 Qg6 39.Rg6 Kf8 40.Kb2 Rb5 41.Kc2 Rc8 42.Kd3 Rd8 43.Kc2 Rc8 44.Kd3 Rd8 45.Kc2=) 37...Kh7?? (better 37...Kf8 38.Bd4 Rd4=) 38.f6+- Kh8 (38...Bf6 39.Qc2 (39.Rf6?! Rd3 40.Rf7 Kh6+-) 39...Rd1 40.Rd1 Rd1 41.Qd1 Bb2 42.Kb2 Qf2 43.Qc2 Qc2 44.Kc2+-) 39.Rg7 (39.Re7 Rb5 40.Qb5 Qf8 41.Qg5 Be3 42.Rg8 Qg8 43.f7 Bd4 44.fg8Q Rg8 45.Qh6) 39...Qg7?? (39...Qh5 40.Ree7 Bf6 41.Rh7 Kg8+-) 40.fg7 Bg7 41.Bd4 (41.Bg7 Kg7 42.h6 Kh8 43.Qc3 Rd4 44.Re8 Kh7 45.Rd8 Rd7 46.Qf6 Rd1 47.Rd1 g4 48.Qg7) 41...Rd4 (41...Bd4 42.Qg6 Rb5 43.Kc2 Rc5 44.Kb3 Bg7 45.Re8 Re8 46.Qe8 Kh7 47.Qg6 Kh8+-) 42.Qg6+/- R4d6 43.Qf5 (43.Qg5 Rd5 44.Re8 Re8 45.Qd5 Re1 46.Kc2 Re3+-) 43...Rf6 (better 43...Bf6!?+=) 44.Qg5+/- Rdf8 45.h6 (better 45.Re7!? Rf1 46.Kc2 R8f2 47.Kd3 Rd1 48.Ke3 Bd4 49.Ke4 Re2 50.Kf5 Rf1 51.Kg6 Re7 52.Qe7 Rg1 53.Kf5 Rf1 54.Kg4 Rg1 55.Kf3+-) 45...Bh6 46.Qh5 Kg8 47.Rg1 Bg7 48.Rg6 (48.Qd5 Kh7+=) 48...R8f7 (better 48...Rf1 49.Kc2 R8f2 50.Kd3 Rf3 51.Ke4 Rf4 52.Ke3 Kf8=) 49.Rg7?? (better 49.Rf6 Rf6 50.Qd5 Kh7 51.Kc2+=) 49...Rg7 50.Qe8 Rf8 (50...Kh7 51.Qe4 Rgg6 52.Kc2-/+) 51.Qe4 (51.Qe6 Rff7-/+) 51...Rff7 (51...Rg1 52.Kc2 Rf2 53.Kd3 Rg3 54.Kc4 Kf8-/+ (54...Ra3? 55.Qg6 Kf8 56.Qd6 Kf7 57.Qa3+-)) 52.Qg4?? (better 52.Qa8 Kh7 53.Qh1 Kg6 54.Qc6 Kg5 55.Qd5 Rf5 56.Qd3-/+) 52...Kf8 (52...Rg4 53.Kb2 Rf3 54.Kb1 Rg2 55.Kc1 Rf1) 53.Qd7?? (better 53.Qc8 Ke7 54.Qc7 Ke8 55.Qc8 Ke7 56.Qc7 Ke8 57.Qc8 Ke7=) 53...Rg6 (53...Rd7 54.Kb2 Rg3 55.Kb1 Rg2 56.Kc1 Rf7 57.Kd1 Rf1) 54.Qc8 Kg7 55.Qd8 Rff6 56.Qd4 Rg1 (56...Rg1 57.Qg1 Kf7+-). TwelveTeen (2575) - penguingim1 (2750), lichess.org, 2016.

5.e3 f5 6.c4 Nf6 7.c5 e4 8.Nd4 d5 (8...dc5 9.bc5 Qe7 10.Qc2=) 9.Nc3 0-0 10.Nce2 (10.Be2 a5=) 10...Qe7 (10...a5 11.Nf4 Qe7 12.Bb5=) 11.h4 (11.Nf4 a5=) 11...Be6 (11...a5 12.Nf4=) 12.Nf4 Bf7 (12...Bd7!?=) 13.h5+/– Nc6 (13...b6 14.hg6 hg6 15.c6+/–) 14.Nc6 bc6 15.hg6 hg6 16.Ba6 Ng4 (16...Rfb8 17.Qa4+/–) 17.Bg7 Kg7 18.d4 (18.Nh3 Rab8+/–) 18...Rh8 (18...ed3 19.Qd3 (19.Nd3?! d4=) 19...Rad8 20.Qd4 Qf6 21.Rd1+/–) 19.Rh3 (19.Nh3 Qh4 20.Qb3 f4 21.ef4 e3+/–) 19...g5 (19...Qf6 20.Be2+/–) 20.Rh8 Rh8 21.Nh3 Be6 22.Qa4 f4+= 23.ef4 e3 24.f3+/– Nf2 25.Ng1 Bd7 26.Qa5+= Rh1 27.Ke2 Bf5 28.fg5+= Rh2 29.Kf1 Kg8 30.Re1?? Qg5 31.Qc7 Qg2 32.Ke2 Nd1 (33.Kd1 Qd2#) 0–1. Steffens,Olaf (2255) – Markgraf,Alexander (2320), Oberliga Nord W, 2003.

5.e3 f5 6.c4 Nf6 7.d4 e4 8.Nfd2 0-0=.

5.e3 f5 6.c4 Nf6 7.Be2 e4 8.Nd4 c5 9.Nb3 Qe7 (9...cb4 10.ab4 Nc6 11.Bc3=) 10.d4 ed3 11.Qd3 Nc6 12.bc5 (12.Nc3 0-0=) 12...dc5 13.0-0 (13.N1d2 0-0=) 13...Be6 (13...0-0 14.Qc2=) 14.N1d2 (14.Bf3 0-0=) 14...Rd8 15.Qc2 0-0 16.Rfe1 b6 17.Nf3 (17.Rad1 Rd6=) 17...Ne4 (17...Rfe8 18.Rad1=) 18.Bg7 Qg7 19.Bd3 Nd6 Attacks the isolani on c4 20.e4 (20.Rad1 Qf6=) 20...fe4 21.Be4 Ne4 22.Qe4 (22.Re4? Bf5–+) 22...Rd6 23.Rad1 (23.Ra2 Bf5 24.Qf4 Rd3=+) 23...Bf5 24.Qe2 Rd1 (24...Re6 25.Qd2=+) 25.Qd1= Qd7 (25...Qf6 26.Nbd2=) 26.Qc1 (26.Qd5 Kg7=) 26...Re8 27.Rd1 (27.Re8 Qe8 28.Qe3 Qe3 29.fe3 Be6–/+) 27...Qg7 (27...Qf7 28.Nbd2=+) 28.h4 (28.Re1 Re1 29.Qe1 Qf6=) 28...Ne5 29.Ne5 Qe5 30.Qg5 (30.h5 Bg4 31.Rd5 Qe1 32.Qe1 Re1 33.Kh2 Bh5–/+) 30...Bc2 (30...Qc3 31.Rd8 Rd8 32.Qd8 Kf7 33.Qc7 Ke6 34.Nc5 bc5 35.Qc6 Ke5 36.Qd5 Kf4 37.Qc5 Kg4=+) 31.Qe5= Re5 32.Rd8 Kf7 33.Nd2 Re1 34.Kh2 Rd1 35.Rd5 (35.g4!?=+) 35…Bf5–/+ 0–1. Kutuzov,D (2335) – Petrosian,TL (2660), Moscow Open A, 2015.

5.e3 f5 6.Bc4 Nf6=.

5.e3 Bg4 6.Be2 Nd7 7.0-0 f5 8.d3 Qe7 9.h3?? (better is 9.Nc3!?=) 9...Bf3 (9...e4 10.Nd4 Be2 11.Qe2=) 10.Bf3 Ngf6?? (better is 10...e4 11.Nc3 ef3–/+) 11.c4 (better is 11.Bb7!? Rb8 12.Bc6+/–) 11...e4= 12.de4 fe4 13.Be2 0-0 14.Nd2 Ne5 15.Qc2 Nc6 16.Rad1 Rae8 17.Nb3 Kh8 18.Nd4 Nd4 19.Bd4 Nd7 20.Qc3 Bd4 (20...Ne5!?+=) 21.Qd4+/– Qe5 22.Qe5 (better is 22.Qa7!? Rb8 23.Qd4+/–) 22...Ne5= 23.Rd4 Nc6 24.Rd2 a5 25.b5 Ne5 26.Rc1 Nd7= 27.Bg4 Nc5 28.Rdc2 h5 29.Be2 Rf5 30.g4 hg4 31.hg4 Rf7 32.Kg2 Ref8 33.Rh1 Kg7 34.Rf1 Rh8 35.Rcc1 g5 36.Rh1 Rhf8 37.Rhf1 Kg6 38.Kg3 Rh8 39.Rh1 Rhf8 40.Rhf1 Rh7 41.Rh1 Rfh8 42.Rh7 Rh7 43.Kg2 Rf7 44.Kg3 Nb3 45.Rc2 Nc5 46.f4 ef3 47.Bf3 Nd3?? 48.Be4+- Kh6 49.Bd3 Rf1 1–0. Fournier,Frederic (1975) – Aries32 (2120), Echecs21 (5/5), 2003.

5.e3 Bg4 6.Be2 Ne7 (6...Nf6 7.0-0=) 7.c4 0-0 (7...Nbc6 8.0-0=) 8.Qc2 (8.0-0 e4 9.Bg7 Kg7+=) 8...Nd7 (8...Nbc6 9.0-0=) 9.d4 (9.Qe4 Bf3 10.Bf3 c6+=) 9...ed4 10.Nd4 Bf5 (10...Be2 11.Qe2 Nb6 12.0-0=) 11.Nf5+= Nf5 12.0-0 (12.Bg7 Kg7 13.Bd3 a5+=) 12...Ne5 (12...Bb2 13.Qb2 Qf6 14.Qf6 Nf6 15.g4+=) 13.Nd2 (13.e4 Ne7+-) 13...Rb8 (13...Qg5 14.e4 Nh4 15.g3 Qd2 16.Qd2 Nhf3 17.Bf3 Nf3 18.Kg2 Nd2 19.Bg7 Kg7 20.Rfd1 Nc4 21.a4–+) 14.Nf3 (14.e4 Ne7+-) 14...Qe7 (14...Nf3 15.Bf3 Bb2 16.Qb2+=) 15.Ne5 Be5 16.Be5 Qe5 17.Rad1 (17.Bd3 Ne7+-) 17...b6 (17...Rfe8 18.Bd3+=) 18.Rd5 (18.Bd3 Ne7+-) 18...Qf6+= 19.Qa4 Qb2 (19...Ne7 20.Rd3+-) 20.Bg4 Ne7 21.Rd4 Rfd8 (21...f5 22.Bf3 a5 23.Qd7+-) 22.Rfd1 (22.Qa7 Nc6 23.Qc7 Nd4 24.ed4 Qd4=+) 22...Qc3 (22...a5 23.b5+-) 23.Bf3 (23.Qa7 Nc6 24.Qc7 Nd4 25.ed4 d5=) 23...a5 (23...Nf5 24.Re4+-) 24.ba5 (24.b5 Re8+-) 24...Qa5 25.Qa5 (25.Qb4 Re8+=) 25...ba5 26.c5 Rb3 (26...Nf5 27.Rd5+=) 27.Ra4 (27.cd6 Rd6 28.Rd6 cd6 29.Rd6 Ra3=) 27...Rb5 28.cd6 Rd6 29.Rd6 cd6 Threatening mate: Rb1 30.Kf1 f6 31.Ke2 (31.Rd4 d5+=) 31...Kf7 (31...d5 32.Rd4+=) 32.Kd3 (32.Rd4 d5+=) 32...Ke6 (32...d5 33.h3=) 33.e4 (33.Re4 Kd7 34.Kc3 Nf5+=) 33...Ke5 (33...Nc6 34.Ke3=) 34.Bg4 (34.Rc4 f5 35.Rc7 fe4 36.Be4 Ke6+=) 34...d5 35.g3 (35.f4 Kd6=) 35...Rb3 (35...h5 36.f4 Kd6 37.Bf3=) 36.Kc2 Rb5 37.Kd3 (37.f4 Kd6=) 37...Rb3 (37...h5 38.f4 Kd6 39.Bf3=) 38.Kc2 Rb5 39.f4 Kd6 40.Rd4 (40.Bf3 Rc5 41.Kd2 Rc4 42.Rc4 dc4+=) 40...Kc5 41.Ra4 (41.Kc3 Rb3 42.Kb3 Kd4 43.ed5 Nd5+=) 41...Kb6 (41...h5 42.Be2 Rb6 43.ed5 Nd5 44.Ra5 Kd4 45.Ra4 Ke3 46.Bd3+-) 42.ed5 (42.e5 fe5 43.fe5 Kc5=) 42...Rd5 (42...Nd5 43.Re4=) 43.Bf3 Rc5 44.Kd3 Kb5 (44...Nd5 45.Rd4 Rc3 46.Ke4 Ra3 47.Kd5 Rf3 48.Kc4–/+) 45.Rd4+= Rc7 (45...Nc6 46.a4 Kb6 47.Rd6+=) 46.a4 Kc5 47.g4 (47.Rc4 Kd6+=) 47...h6 48.Rc4 Kb6 49.Rc7 Kc7 50.Kd4 (50.h4 f5=) 50...Kb6 (50...f5 51.h3+=) 51.Bd5 (51.Be4 f5 52.gf5 gf5+=) 51...g5 (51...f5 52.Bf3=) 52.f5 (52.fg5 fg5 53.Be4 Nc6 54.Bc6 Kc6=) 52...Nc6 (52...h5 53.gh5 Nf5 54.Kd3=) 53.Bc6 Kc6 54.Kc4 (54.Kc4 Kc7 55.Kb5+-) 1–0. Fucik,Timo – Klingert,Wilfried, Baden–chT U20, 2002.

5.e3 Bg4 6.Be2 Ne7 7.d3 0-0 8.c4 e4 (8...a5!?=) 9.Bg7+/– (9.de4? Bb2 10.Ra2 Bf3 11.Bf3 Be5–+) 9...Kg7 10.de4 Nd7 11.Nc3 Nc6 12.0-0 Qf6 (12...Bf3 13.Bf3 Re8 14.Be2+/–) 13.Nd5+- Qd8 14.Nd4 Be6 (14...Be2 15.Qe2 Re8 16.b5+/–) 15.Ne6 (better is 15.Nb5!? Rc8 16.Na7 Na7 17.Qd4 Ne5 18.Qa7+-) 15...fe6+/– 16.Nf4 Nce5?? (better is 16...Qe7+/–) 17.Ne6+- (17.Ne6 Kh6 18.Nd8 Rad8 19.f4+-) 1–0. Fournier,Frederic (1920) – figuereo (1810), Active, 2011.

5.e3 Bg4 6.Be2 Nf6 7.0-0=.

5.e3 Nh6 6.d4 Qe7 (6...e4 7.Nfd2 Bf5 8.c4=) 7.Be2+= 0-0 8.0-0 Nd7 9.c4 f5 (9...Nf5 10.Nc3+=) 10.de5 (10.Nc3 c6+=) 10...de5 (10...Ne5 11.Nc3+=) 11.Nc3 c6 12.Qc2 Nf7 13.Rad1 (13.Rfd1 Nf6+=) 13...Nf6 (13...a5 14.ba5 Ra5 15.Rd2=) 14.Na4 (14.Rd2 Be6+=) 14...g5 (14...b6 15.c5 b5 16.Nc3=) 15.Nd2 f4 (15...b6 16.e4+=) 16.ef4+/– ef4 (16...gf4 17.Rfe1+/–) 17.Rfe1 Re8 18.Bd3 (better is 18.Nf3+/–) 18...Qe1=+ 19.Re1 Re1 20.Nf1 Bg4 (20...Ne5!?=) 21.f3 Bh5= 22.Bc3 Re7 23.Nc5 Nd6 24.Nd2 Rae8 25.h3 Bf7 26.Kh2 h6 27.Ncb3 Nh5 28.Bg7= Ng7 29.c5 Nb5 30.a4 Nc7=+ 31.Ne4 Nd5 32.Bc4 Nh5 33.Nbd2 Nb4 34.Bf7 Rf7 35.Qb3?? Nd5–/+ 36.Nd6 Re3 37.Qb1=+ Rg7 38.Nf5 Re2 39.Ng7+/– Ng7 40.Qd3 Re3= 41.Qg6 Re6 42.Qd3 Re1 43.Qg6 Ne3 44.Ne4?? Nf1 45.Kg1 Ng3 46.Kh2 Rh1# 0–1. Chilton,Alexis – Schmidt,Peter (2115), Berlin GER Unicorn Open, 2005.

5.e4 Ne7 6.h3 (6.d4 Bg4=) 6...0-0 7.c4 (7.Bc4 c6=) 7...c6 (7...f5 8.Bd3=+) 8.d3 (8.d4 f5 9.Nbd2 fe4 10.Ne4 d5 11.cd5 cd5=+) 8...f5 9.Nbd2 f4 (9...a5 10.c5=) 10.Be2+= h6 (10...Qb6 11.c5 dc5 12.Qb3 Kh8 13.Nc4+/-) 11.Nh4 (11.0-0 a5+=) 11...g5 (11...a5 12.0-0=) 12.Nhf3+= Qe8 13.Nh2 (13.d4 ed4 14.Bd4 Qg6+=) 13...Be6 14.a4 (14.h4 gh4 15.Bg4 Bd7+=) 14...Nd7 15.0-0 Nf6 (15...a5 16.Bg4 Qf7 17.b5=) 16.Ng4 (16.Nhf3 g4 17.hg4 Ng4+=) 16...Ng4 (16...Nd7 17.Nf3=) 17.Bg4+= Bg4 18.Qg4 Ng6 19.b5 Qe7 20.Ba3 c5 21.Bb2 Rf7 (21...Rae8 22.a5+=) 22.Qh5 Kh7 23.g3 Raf8 24.Qe2 f3 25.Qd1 Qe6 26.Kh2 g4 27.Rh1 gh3 28.Qf1 Bf6 29.Qh3 (29.Nf3? Be7 30.Qh3 Qh3 (30...Rf3?? 31.Qe6 Rf2 32.Kh3+-) 31.Kh3 Rf3-+) 29...Qh3 30.Kh3 Bg5 31.Bc1 h5 32.Nf1 Bc1 33.Rc1 h4 (33...Rg8 34.Ne3=) 34.Rc2 (34.Ne3!?+/-) 34...Kg8 (34...Rh8 A) worse 35.gh4 Nf4 36.Kh2 Kg6 (worse 36...Nd3 37.Rd2 Nf4 38.Ne3+=) 37.Rg1 Ng2 38.Rg2 fg2=+; B) 35.Ne3 Kg7 36.Rcc1+=) 35.Kh2 (35.Ne3!?=) 35...hg3 36.Ng3 Rh7 37.Kg1 Rh1 38.Kh1 Nf4 (38...Kf7 39.Kh2 Rh8 40.Kg1-/+) 39.Rd2 (39.Nf5!?=) 39...Kf7-/+ 40.Kg1 Rg8 41.Kh2 Rh8 42.Kg1 b6 43.Rd1 (43.a5 Rh7=+) 43...Kg6 44.Nf5?? (better 44.a5-/+) 44…Ne2 (44...Ne2 45.Kf1 Rh1) 0-1. petrobbo (2070) - ed54 (2090), ChessWorld.net, 2013.

5.e4 f5 6.ef5 Bf5 7.Bc4 Nd7 8.d3=.

6.Qb3 Nbc6 A) 7.e4 A1) 7...a6 8.Be2 (8.Bd3 Bg4 9.Be2 0-0 10.h3 Be6 11.0-0 h6 12.Qd3 f5 13.Nc3=; 8.Qd3 f5 9.Nc3 fe4 10.Ne4 Bf5 11.Be2 d5 12.cd5 Qd5 13.Qd5=; 8.b5 Na5 9.Qc2 ab5 10.cb5 f5 11.d3 Bd7 12.Nc3 Be6 13.Rb1+=; 8.c5 0-0 9.Bc4 dc5 10.bc5 Na5 11.Qc2 Nc4 12.Qc4 Nc6 13.0-0+=) 8...f5 9.d3 0-0 10.0-0 Be6 11.Ng5 Qd7 12.Ne6 Qe6 13.Bf3=; A2) 7...f5 8.Bd3 a6 9.0-0 0-0 10.c5 Kh8 11.ef5 Nf5 12.Be4 Ncd4 13.Nd4+=; B) 7.b5 B1) 7...Nd4 8.Nd4 ed4 9.e3 Nf5 10.e4 Nh6 11.Qd3 Qf6 12.Be2 Bg4 13.Nc3=; B2) 7...Nb8 8.Qc2 (8.d4 ed4 9.e3 Nf5 10.Nd4 Nd4 11.Bd4 Bd4 12.ed4 0-0 13.Nc3=; 8.e4 f5 9.ef5 Bf5 10.c5 Nd7 11.cd6 cd6 12.d4 e4 13.Nh4=; 8.e3 0-0 9.Be2 Nd7 10.0-0 Nc5 11.Qc2 Bf5 12.d3 e4 13.Bg7+=) 8...0-0 9.e3 Bf5 10.e4 Bg4 11.Be2 a6 12.h3 Bc8 13.d4=; B3) 7...Na5 8.Qc3 (8.Qa4 b6 9.d4 ed4 10.e3 Nf5 11.e4 Nh4 12.Nd4 Qg5 13.Rg1–/+; 8.Qb4 c5 9.Qa4 a6 10.ba6 Nac6 11.e4 Ra6 12.Qb3 f5 13.d3+=) 8...c6 9.bc6 Nec6 10.e3 Be6 11.Be2 d5 12.d3 Rc8 13.0-0+=.

6.e3 0-0 7.Be2 Nf5 8.0-0 e4 9.Bg7 ef3 10.Bf8 fe2 11.Qe2 Qf8 12.d4 Nd7 13.Nd2 Nb6 14.Rac1 Be6 15.Rfd1 Qh6 16.Qf3 Nh4?? (better is 16...c6=) 17.Qb7+- Rf8 (17...Qg5 18.g3 Rc8+-) 18.Qc7 Qg5 19.g3 Nf5 (19...Nc8+-) 20.Nf3 (better is 20.Qa7 Nc4 21.Ne4+- (21.Nc4?! Bc4 22.e4 Be2 23.ef5 Bd1 24.Rd1 Qf5+-; 21.Rc4 Ne3 22.Ne4 Qf5 23.fe3 Qe4+/–)) 20...Qf6 21.Kg2 Rc8 22.Qa7 Nc4 23.a4?? (better is 23.d5 Bd5 24.Rd5 Nfe3 25.fe3 Qb2 26.Rd2 Qc1 27.Re2+=) 23...Nce3! 24.fe3 Ne3 25.Kf2 Nd1 26.Rd1 Bg4 27.Rd3 Rc2 28.Ke3 0–1. Fournier,Frederic (1980) – vitsch (2095), Active (5/0), 2004.

6.e3 0-0 7.Be2 Bg4 8.d3 Nbc6 9.0-0 a5 (9...a6 10.Nc3=) 10.b5+= Nb8 11.Nc3 Nd7 12.h3 Bf3 (12...Be6 13.d4 ed4 14.ed4+=) 13.Bf3 (worse is 13.gf3 Nf5+=) 13...Rb8 14.Nd5 (14.Qd2 c6+=) 14...Nd5 15.Bd5 Nf6 16.Bf3 Re8 17.Be2 e4 18.de4 Ne4 19.Bg7 Kg7 20.Qd4 Nf6 21.Bf3 Kg8 22.a4 (22.b6 c5 23.Qf4 Re6+=) 22...Qe7 23.Rfd1 Qe5 (23...Nd7 24.Ra2=) 24.Qe5 (24.b6 cb6 25.Qd6 Rbc8+/–) 24...Re5 (24...de5 25.Ra2+=) 25.Bd5 (25.b6!? Kg7 26.bc7+/–) 25...b6 26.Rd4 Nd5 27.Rd5 Rbe8= 28.Re5 Re5 29.Rd1 Rc5 30.Rd4 Kg7 31.f3 Kf6 32.e4?? Ke6?? 33.f4 f5 34.Kf2 h6 35.g4 fe4 36.Re4 Kf6 37.Ke3 Kf7 38.Kd4 Kf6 39.h4 Kf7 40.g5 hg5 41.fg5 Rf5 42.Ke3 Rf1 43.Rf4+- Rf4 44.Kf4 Ke6 45.Ke4 Ke7 46.Kd5?? Kd7+= 47.Kd4 Ke6 48.Ke4 ½–½. Fournier,Frederic (1805) – Ladygin,Fedor Anatolyevich (1805), Open (3+0) ChessOK.com, 2012.

6.e3 Bf5=.

7.d3 h6 (7...a5 8.Nbd2 (8.e3 Na6 9.d4 ed4 10.Bd4 Bd4 11.Nd4 Nf5 12.Nf5 Bf5 13.Nc3=; 8.e4+= f5 9.c5 Kh8 10.Nbd2 Nbc6 11.cd6 Qd6 12.Nc4 Qe6 13.b5+=; 8.Nc3 ab4 9.ab4 Ra1 10.Ba1 Bg4 11.e3 Bf3 12.gf3 f5 13.h4=) 8...ab4 9.ab4 Ra1 10.Ba1 Be6 11.e3 b5 12.Be2 Nbc6 13.0-0=; 7...Bg4 8.Nbd2 (8.e3 Bf3 9.gf3 f5 10.Nd2 f4 11.Bh3 Kh8 12.Rg1 Nf5 13.e4+=; 8.h3 Bf3 9.gf3 a5 10.e3 ab4 11.ab4 Ra1 12.Ba1 f5 13.h4+=; 8.Nc3 f5 9.Ng5 f4 10.h3 Bf5 11.Nge4 Nbc6 12.e3 Be4 13.Ne4+=; 8.d4 ed4 9.Nd4 Nbc6 10.Nc6 Nc6 11.Bg7 Kg7 12.Qc3 f6 13.e3+=) 8...a5 9.h3 Be6 10.e3 ab4 11.ab4 Ra1 12.Ba1 b5 13.Be2=; 7...Bd7 8.e4 (8.e3 a5 9.Be2 ab4 10.ab4 Ra1 11.Ba1 b5 12.0-0 bc4 13.dc4=) 8...a5 9.Be2 ab4 10.ab4 Ra1 11.Ba1 f5 12.c5 Kh8 13.0-0=; 7...Bf5 8.e3 (8.Nbd2 a5 9.e4 Bg4 10.h3 Be6 11.Be2 ab4 12.ab4 Ra1 13.Ba1=; 8.e4 Be6 9.Be2 f5 10.0-0 h6 11.Nbd2 g5 12.Rae1 Nd7 13.d4=; 8.Nc3 Bg4 9.e3 Bf3 10.gf3 f5 11.h4 f4 12.h5 fe3 13.fe3=) 8...Nbc6 9.Be2 h6 10.b5 Nb8 11.0-0 Nd7 12.d4 ed4 13.Bd4=) 8.h4 (8.e3 a5= 9.Be2 Na6 10.0-0 ab4 11.ab4 Be6 12.d4 ed4 13.Bd4+=; 8.e4 Be6 9.Be2 f5 10.Nc3 Nbc6 11.0-0 a6 12.Rfe1 g5 13.Nd5=) 8...Be6 (8...a5 9.e3 ab4 10.ab4 Ra1 11.Ba1 Bg4 12.Be2 Na6 13.Nc3+=) 9.a4 (9.e3 Nbc6+= (9...b5 10.Qc2 bc4 11.dc4 a5 12.b5 Nd7 13.Be2+=) 10.b5 Na5 11.Qa4 b6 12.h5 g5 13.Be2+=; 9.g3 Nbc6 10.Bg2 e4 11.de4 Bc4 12.Qc2 Bb2 13.Qb2=) 9...Nbc6 (9...a5 10.b5 Nd7 11.e3 Re8 12.Nbd2 Nc5 13.Qa3+=) 10.b5 (10.e3 Bg4 11.Be2 a5 12.b5 Nb4 13.Bc3+=) 10...Nd4 11.Nd4 ed4 12.Nd2 (12.h5 g5 13.g3+=) 12...c5 13.g3 (13.e3+=) 13...d5 14.Bg2 Qd7 15.0-0 dc4 16.dc4 Bh3 17.Rfd1 Bg2 18.Kg2 Nf5 19.Qd3 Rad8 20.Nf1 (20.a5 Rfe8 21.Nb3 Qc7+=) 20...Rfe8–/+ 21.Bc1 Qe6 22.Ra2 Nd6 23.Nd2 (23.Rc2 Ne4–/+) 23...f5 (23...Qe2 24.Qe2 Re2 25.Ra3–+) 24.Ba3? (24.Re1 Ne4–/+) 24...Ne4 (24...Qe2!? 25.Qe2 Re2 26.Bc5 Nc4 27.Kf3–+) 25.Nb3 (25.Raa1!?–/+) 25...b6–+ 26.Nc1 f4! 27.Rf1 Rf8 28.f3 Ng3 29.Rg1 Rde8 30.a5 Nf5 31.h5 Ne3 32.Kf2 g5 33.ab6 ab6 34.Ke1 Nc4 35.Qb3 Kh8 36.Nd3 Qe3 37.Rf1 Ne5 38.Kd1 c4 39.Qb1 cd3 40.Bf8 Bf8 41.ed3 Nf3 (41...Nf3 42.Raf2 g4–+) 0–1. Lopatin,Olga (2115) – Jelica,Mara (2220), 5th ch–EURw, Dresden GER 2004.

7.d4 ed4 8.Nd4 (8.Bd4 Bd4 9.Nd4 Nbc6 10.Nc6 Nc6 11.e3 a5 12.b5 Ne5 13.Nc3=) 8...a5 9.e3 Nf5 10.Nf5 Bf5 11.Bg7 Kg7 12.Qb2 f6 13.Nc3=.

7.e3 A) 7...Nbc6 8.Be2 (8.b5 Na5 9.Qa4 b6 10.d4 ed4 11.Bd4 Bd4 12.Nd4 Nf5 13.Nc3=) 8...e4 9.Bg7 Kg7 10.Ng5 f5 11.Qc3 Kg8 12.0-0 h6 13.Nh3=; B) 7...Re8 8.d3 (8.e4 a5 9.Be2 f5 10.c5 d5 11.ed5 Nd5 12.Bc4 Be6 13.Be5=; 8.Bd3 Bg4 9.Be4 c6 10.h3 Be6 11.Ng5 Bc8 12.0-0 d5 13.cd5=; 8.d4 ed4 9.Nd4 Nbc6 10.Nc6 Nc6 11.Bg7 Kg7 12.Qc3 Kg8 13.Be2=; 8.Be2 e4 9.Bg7 Kg7 10.Nd4 Nec6 11.Nc6 Nc6 12.0-0 Ne5 13.Nc3=) 8...a5 9.Be2 ab4 10.ab4 Ra1 11.Ba1 e4 12.Bg7 ef3 13.Bb2+=; C) 7...Nf5 8.Nc3 (8.e4 Nd4 9.Nd4 ed4 10.Be2 f5 11.ef5 Bf5 12.0-0 Qe7 13.Bd3=; 8.Bd3 Nh4 9.Nh4 Qh4 10.Nc3 Be6 11.0-0 f5 12.Be2 f4 13.d3=; 8.Be2 e4 9.Bg7 Ng7 10.Nd4 Qg5 11.Bf1 Ne6 12.Ne6 fe6 13.Ra2=) 8...Nh4 9.Nh4 Qh4 10.Be2 Bf5 11.0-0 Nd7 12.d3 Nf6 13.Nd5=; D) 7...a5 8.Bd3 (8.Be2 e4 9.Bg7 Kg7 10.Qc3 f6 11.Nd4 ab4 12.ab4 Ra1 13.Qa1=) 8...ab4 9.ab4 Ra1 10.Ba1 Be6 11.Ng5 Bd7 12.0-0 Nec6 13.f4=.

7.e4 A) 7...h6 8.d4 (8.Be2 f5 9.Nc3 Nbc6 10.0-0 Nd4 11.Nd4 ed4 12.c5 Kh7 13.cd6+=; 8.Nc3 Nbc6 9.Be2 f5 10.0-0 Nd4 11.Nd4 ed4 12.c5 Kh7 13.cd6+=; 8.c5 Nbc6 9.cd6 Qd6 10.Bc4 a6 11.0-0 b5 12.Be2 Be6 13.Qd3+=; 8.Qe3 f5 9.Be2 fe4 10.Qe4 Rf4 11.Qe3 Nf5 12.Qb3 e4 13.c5–/+) 8...ed4 9.Bd4 Bd4 10.Nd4 Nbc6 11.Nc6 Nc6 12.Qe3 f5 13.Nc3=; B) 7...f5 8.c5 (8.Bd3 Nbc6 9.b5 Na5 10.Qa4 b6 11.h4 h6 12.Qc2 a6 13.h5+=; 8.Nc3 fe4 9.Ne4 Rf4 10.c5 d5 11.Ng3 Nbc6 12.b5 Na5 13.Qa2=) 8...Kh8 9.Ng5 d5 10.ed5 Nd5 11.Qg3 Bf6 12.Bc4 Nf4 13.h4=; C) 7...Be6 8.Nc3 (8.Be2 f5 9.Ng5 Bc8 10.c5 d5 11.ed5 Nd5 12.0-0 c6 13.Nf3=; 8.Ng5 Bd7 9.Be2 Nec6 10.Nf3 f5 11.c5 Kh8 12.cd6 cd6 13.d3=) 8...a5 9.Bd3 ab4 10.ab4 Ra1 11.Ba1 Na6 12.0-0 Bg4 13.Be2=; D) 7...a5 8.Nc3 Nbc6 9.b5 Nd4 10.Nd4 ed4 11.Ne2 f5 12.f3 c5 13.bc6=.

6.c4 Nc6 7.d3 f5 8.Be2 Nf6 9.Nc3 e4 10.Ng5 Bg8 11.de4 h6 12.Nf3 Ne4 13.Qc2 Qf6 14.b5 (14.Ne4? Qb2 15.Ra2 Qc2 16.Nd6 cd6 17.Rc2 Rc8–+) 14...Ne5 (worse is 14...Nc3 15.bc6 bc6 16.Rc1+-) 15.Ne5 (worse is 15.Ne4 Nf3 16.gf3 Qb2 17.Qb2 Bb2+=) 15...Qe5 16.Na4 Qe7 17.Bg7 Qg7 18.Rd1 White intends c5 18...Be6 19.f3 Nf6 20.0-0 0-0 21.c5 Qe7 22.Rfe1 b6 23.cd6 cd6 24.Qd3 Bf7 25.Bf1 Rfd8 26.Nc3 Rac8 27.Qd2 Qe5 28.Rc1 Kg7 29.Bd3 Nd7 30.Bb1 ½–½. Fournier,Frederic (2370) – Camelot (2440), echecsemail.com (team), 2008.

6.c4 Nc6 7.d3 f5 8.Be2 Nf6 9.Nc3 e4 10.Ng5 Bg8 11.de4 h6 12.Nf3 Ne4 13.Qc2 Qf6 14.b5 (14.Ne4? Qb2 15.Qb2 Bb2 16.Nd6 cd6–+) 14...Ne5 (14...Nc3? 15.bc6 bc6 16.Rc1+-) 15.Ne5 (worse is 15.Ne4 Nf3 16.gf3 Qb2 17.Qb2 Bb2+=) 15...Qe5 16.Na4 Qe7 17.Bg7 Qg7 18.Rd1 White prepares the advance c5 18...Be6 (18...Qe5 19.Bf3+=) 19.f3 (19.Bf3 Qf7+=) 19...Nf6= 20.0-0 0-0 (20...Qf7 21.Rd4=) 21.c5+= Qe7 22.Rfe1 b6 (22...Rae8 23.Rd3+=) 23.cd6+= cd6 24.Qd3 Bf7 25.Bf1 Rfd8 26.Nc3 Rac8 27.Qd2 Qe5 28.Rc1 Kh7 29.a4 (29.Bd3 Re8+=) 29...Kg7 (29...Rc5 30.e4=) 30.Red1 (30.Bd3 Bb3+=) 30...Kh7 ½–½. Pieraccini,Riccardo (2115) – Dicicco,Daniela (2020), Grosseto 1st, 2009.

6.c4 Nd7 7.Nc3 c6 8.Be2 Nh6 9.h3 (9.d4 0-0+=) 9...f5 10.d4 0-0 (10...e4 11.Nd2=) 11.d5 cd5 12.cd5 Bf7 13.0-0 Kh8 14.e4 (14.Rc1+=) 14...f4 (better is 14...fe4!? 15.Nd2 Nf5 16.Nde4 Nb6=) 15.Nb5 Nb6 16.Rc1 a6 17.Nc7 (17.Nc3 Rc8+/–) 17...Rc8+= 18.Na6 (better is 18.Ne6!? Be6 19.de6 Rc1 20.Bc1+=) 18...ba6 19.Ba6 Rc1 20.Qc1 Qe7 21.Qc6 Rb8 22.Qc2 (22.Rc1 Na8=+) 22…Be8. rommeltdf (1925) – jromero (2280), net–chess.com, 2002.

6.d3 Nf6 (6...Ne7 7.Be2=) 7.c4 (7.Be2 0-0=) 7...Nbd7 (7...0-0 8.Be2=) 8.Be2 0-0 (8...a5 9.Nbd2=) 9.Nbd2 (9.0-0 a5=) 9...c5 (9...Qe7 10.0-0=) 10.b5 (10.0-0 Qb6=) 10...b6 (10...a6 11.ba6 ba6 12.Rb1=) 11.a4 (11.Ng5 Bf5+=) 11...Qc7 (11...a6 12.0-0=) 12.0-0 (12.Ng5 a6=) 12...Bh6 13.Qc2 Bf5 (13...a6 14.Rfb1=) 14.e4 (14.a5 ba5 15.Bc3 a6 16.Ba5 Qb7 17.ba6 Ra6+=) 14...Be6= 15.a5 Rfe8 (15...ba5 16.Bc3=) 16.ab6 (16.Ra4 a6 17.ab6 Qb7+=) 16...ab6= 17.Ra8 Ra8 18.Ra1 Qb7 (18...Ra1 19.Ba1 Nh5 20.Nf1=) 19.Ra8+= Qa8 20.Qb3 Qa5 (20...Nh5 21.Qd1=) 21.Bc3 Qa7 22.Nb1 (22.Qc2 Qc7=) 22...Bf4 (22...Nh5 23.Qc2=) 23.g3 (23.Qc2 Qc7=) 23...Bh6 24.Qa3 Qa3 (24...Qb8 25.Bd2 Bd2 26.Nbd2=) 25.Na3 Bc1 (25...Kf8 26.h4=) 26.Nc2 Nb8 (26...g5 27.h4 h6 28.hg5 hg5 29.Ne3+=) 27.Bd2 (27.Nd2 Nfd7+=) 27...Bd2= 28.Nd2 Bg4 (28...g5 29.Ne3=) 29.Bg4+= Ng4 30.Kg2 Nf6 (30...Nd7 31.h3 Ngf6 32.Ne3+=) 31.h3 (31.Ne3 h6+=) 31...Kf8 (31...Nbd7 32.f4+=) 32.Nf1 (32.f4 Nbd7+=) 32...Ke7 (32...Nbd7 33.f4+=) 33.Nfe3 (33.Nce3 Nbd7+=) 33...Nbd7 34.Nd5 (34.f4 h5+=) 34...Nd5= 35.ed5 (35.cd5 h6=) 35...Nf6 (35...h5 36.h4=) 36.Ne3 (36.f4 Nd7=) 36...h6 (36...Nh5 37.Nd1=) 37.Kf3 Nh7 38.h4 (38.g4 Nf6=) 38...h5 (38...f5 39.Ke2=) 39.Nc2 (39.Ke2 f5=) 39...Nf6 40.Ne3 (40.Kg2 Nd7=) 40...Kd7 (40...Nh7 41.Ke2=) 41.Nd1 (41.Nf1 Ng4=) 41...Ke7 (41...Ng4 42.Ke2=) 42.Nc3 Kd7 43.Ne4 (43.Na4 Kc7=) 43...Ke7 (43...Ng4=) 44.Nf6 (44.Ke2!?=) 44...Kf6=+ 45.Ke3 (45.g4 Kg7=+) 45...Kf5–/+ 46.f3 (46.f4 f6–/+) 46...g5 47.hg5 Kg5 48.Kf2 f5 49.Ke3?? (better 49.f4 ef4 50.gf4 Kf4 51.d4–/+) 49...h4 (better 49...f4 50.Kf2 fg3 51.Kg3 h4 52.Kh3 Kf4 53.Kh4 Kf3–+) 50.gh4+- Kh4 51.f4 ef4?? (better 51...Kg3 52.fe5 f4 53.Ke2 Kg2+-) 52.Kf4 Kh3 53.Kf5 Kg3 54.Ke6 Kf3 55.Kd6 Ke3 56.Kc6 Kd3 57.d6 Kc4 58.d7 Kb4 59.d8Q c4 60.Qd2 c3 61.Qc1 Kb3 62.Kb6 c2 (62...Kb4 63.Ka6 Kc4 64.b6 Kd5 65.b7 Ke5 66.b8Q Ke4 67.Qbf4 Kd5 68.Qd1 Kc5 69.Qdd6) 63.Kc6 (63.Kc5 Kc3 64.b6 Kb3 65.b7 Ka2 66.Qc2 Ka3 67.Qd3 Ka4 68.b8Q Ka5 69.Qbb5) 63...Kb4 64.b6 (64.Qc2 Ka3 65.b6 Kb4 66.b7 Ka3 67.Qd3 Ka4 68.b8Q Ka5 69.Qbb5) 64...Kb3 (64...Kc3 65.b7 Kb4 66.b8Q Kc4 67.Qc2 Kd4 68.Qf4) 65.b7 Ka2 66.Qc2 Ka1 (66...Ka3 67.Qd3 Ka4 68.b8Q Ka5 69.Qbb5) 67.Qc3 (67.Qc3 Ka2 68.Qd2 Ka1 69.Qe1 Ka2 70.b8Q Ka3 71.Qa5; 67.Qd1 Ka2 68.b8Q Ka3 69.Qbb3) 1–0. Fournier,Frederic (2165) – TuuPutttaMalder (1680), Active, 2007.

6.d4 e4 7.Nfd2 f5 (7...Nf6 8.c4=) 8.c4 Nf6 9.Nc3 0-0 10.Be2 Bf7 (10...d5 11.0-0=) 11.0-0+= Qe7 12.Qb3 g5 (12...Nbd7 13.Qc2+=) 13.b5 (13.Rad1 Nbd7+=) 13...Nbd7 14.Rac1 Kh8 (14...f4 15.ef4 e3 16.Ndb1 gf4 17.Bf3+=) 15.a4 Rg8 (15...Rae8 16.Qb4+=) 16.Ba3 (16.a5 a6+=) 16...Nf8 (16...c5 17.d5+=) 17.Qb4 (17.a5 f4+=) 17...b6 18.c5 bc5 19.dc5 d5 20.Bb2 Ne6= 21.Nb3 g4 22.Rfd1+= f4 23.Nd4 Nd4 24.Rd4 f3 25.Bf1 fg2 26.Bg2 Rad8 27.Ne2 Nd7 28.c6 Qb4 29.Rb4 Bb2 30.Rb2= Ne5 31.Nf4 Nf3 32.Kh1 d4=+ 33.ed4 Rd4–/+ 34.a5 Rgd8 35.Rbb1 Bc4 36.b6 ab6 37.ab6 cb6 38.Bf3 gf3 39.Nh5 b5–+ 40.Ra1 R4d6 41.c7 Rc8 42.Ng3 Rc6 43.Ne4 R8c7 44.Ra8 Kg7 45.Ng3 b4 46.Nf5 Kf7 47.Nd4 Rc5 48.h3 Bd5 49.Rc5 Rc5 50.Rb8 Rc4 51.Nf5 Rc1 52.Kh2 b3 53.Ne3 Be6 54.Kg3 Rb1 55.Kf3 Bh3 56.Rb7 Kg6 57.Kf4 Be6 58.Rb6 ½–½. Koester,Roman (2085) – Wanzek,Daniel (2135), Oberliga East B, 2006.

6.Be2 Nc6=.

6.Be2 Nd7 7.0-0 Ne7 8.Ng5 Bd5 9.c4 Be6 (9...Nf5!?+=) 10.Ne6+- fe6 11.Qb3 (11.Bg4 Nf8+-) 11...0-0 12.Nc3 (12.Bg4 Rf6+=) 12...c6 13.Ne4 d5 (13...Nc8 14.Bg4 Qe7 15.Ng5 Qg5 16.Be6 Rf7 17.f4+=) 14.Ng5+- Nf5?? (better 14...Rf6+-) 15.Ne6+- Qe7 16.cd5 cd5 (16...Rf7 17.dc6 bc6 18.Rac1+-) 17.Nf8 Kf8 18.Qd5 Rd8 (18...Nb6 19.Qa5+-) 19.Qb7 1–0. Teverovski,Bogoljub (2015) – Neil,Charlie, FICGS, 2016.

6.Be2 Nd7 7.0-0 Ngf6 8.d4+= ed4 9.Nd4 (9.Qd4? Nh5 10.Qg7 Ng7 11.Bg7 Rg8–+; 9.Bd4?! 0-0=; 9.ed4?! 0-0=) 9...Bd5 (9...0-0 10.Nd2=) 10.c4 Be4 (10...Be6!?+=) 11.Nc3 0-0 12.Ne4 (12.f3 Bf5+-) 12...Ne4+= 13.Bf3 (better 13.Qd3 Re8 14.f3+=) 13...Nef6?? (better 13...Qh4+=) 14.Bb7+- Rb8 (14...Ne5 15.Ba8 Qa8 16.Rc1+-) 15.Nc6 Rb7 (15...Qe8 16.Nb8 Qb8 17.Qf3+-) 16.Nd8 (16.Nd8 Rd8 17.Qf3+-) 1–0. Foster,Duncan – Neil,Charlie, FICGS, 2016.

6.Be2 Nd7 7.0-0 g5 8.d4=.

6.c4 0-0 7.Nc3 c6 8.d4 e4 9.Nd2 d5 10.Qb3 Be6 11.c5 f5 12.g3 g5 13.h4 f4 14.gf4 gf4 15.Rg1 fe3 16.fe3 Nf5 17.0-0-0 Ne3 18.Nce4 Nd1 19.Rg7 Kg7 20.Qg3 Kf7 21.Ng5 Ke7 22.Qe5 Rf6 23.Bh3 Qg8 24.Qd6 Ke8 25.Ne6 Na6 26.Nc7 Nc7 27.Qf6 Nb2 28.Kb2 Qf7 29.Qh8 Ke7 30.Qe5 Ne6 31.Qd6 Kf6 32.Qe5 Ke7 33.Qd6 Ke8 34.Be6 Qe7 35.Qe5 Kd8 36.Qh8 Kc7 Time forfeit 0-1. Superfish (2245) - MenetekelUphrasim (2280), Rated Blitz game, lichess.org, 2016.

6.c4 0-0 7.Nc3 f5 8.d3 f4 9.e4 Bg4 10.Be2 Nbc6 11.Nd5 Bf3 12.Bf3 (worse is 12.gf3 Nd4+=) 12...Nd5 13.cd5 Nd4 14.Bd4 ed4 15.Bg4 Be5 16.Be6 Kg7 17.Qf3 c5 18.0-0 Qe7 19.Rfc1 b6 20.Rab1 h5 (20...Qe8 21.Rc4+=) 21.a4 Rab8 22.b5 Rh8 23.Qh3 Rbf8 24.f3 Rf6 25.Rc2 g5 26.Bf5 Rfh6 27.Ra1 (27.a5!?=) 27...Kf8+= 28.a5 g4 29.fg4 hg4 30.Qg4 Rh2 31.Rca2 Rh1 32.Kf2 Ra1 33.Ra1 Rg8 34.Bg6 ba5 35.Ra5 Qc7 (better is 35...Qb7+/–) 36.b6 Qb6 37.Qf5 Kg7 38.Qf7 Kh6 39.Qh7 Kg5 40.Qg8 Qa5 41.Bf5 (41.Be8 Kh4 42.Qh7 Kg5 43.Qf5 Kh4 44.Qh5) 41...Kf6 42.Qe6 Kg7 43.Qe7 Kg8 (43...Kh6 44.Qh7 Kg5 45.Qg6 Kh4 46.Qg4) 44.Be6 Kh8 45.Qf8 1–0. Logvinov,Kirill (1795) – Geranichev,Mikhail (1955), Elets–C op, 2009.

6.c4 0-0 7.Nc3 f5 8.d4 e4 9.Nd2 c6 10.d5 cd5 (10...a5 11.Be2=) 11.cd5 Nd7 (11...a5 12.ba5 Ra5 13.Rc1=) 12.Qb3 Nf6 (12...Ne5 13.Nc4=) 13.Be2 Bd7 14.h3 (14.0-0 Be8=) 14...Be8= 15.g4 (15.0-0!?=) 15...Bf7+= Will d5 fall? 16.gf5 (16.Bc4+=) 16...gf5 (better is 16...Nf5!? 17.Rb1 Re8–/+) 17.Rg1= Ng6 (17...Kh8 18.Nc4=) 18.0-0-0 Rc8 19.Kb1 Ne5 (19...a6 20.Nc4+=) 20.Rg5 Bg6 (20...a6 21.h4 Bg6 22.Rdg1+/–) 21.Rdg1 (21.Nb5 a5 22.Be5 de5 23.Nc4+/–) 21...Kf7 (21...Bh6 22.Rf5 Kh8 23.Rg6 hg6 24.Rf6 Rf6 25.Nde4+/–) 22.Nb5+/– Bh6 23.Be5 (23.R5g2 f4 24.ef4 Bf4+/–) 23...de5 24.d6 (better is 24.Rg6!? hg6 25.Nc4+/–) 24...Kg7= 25.Rf5 a6 26.Nc7?? (26.Na7 Ra8 27.Re5 Qd6 28.Nc4+=) 26...Qd6–+ 27.Ne6 Kh8 28.Nf8 Bf5 29.Nc4 (29.Nh7 Bh7 (29...Qd2?! 30.Nf6 Bg7 31.Qf7 Qc2 32.Ka1 Qc3 33.Kb1 Qc2 34.Ka1 Qc3 35.Kb1 Qc2=; 29...Kh7?! 30.Qf7 Kh8 31.Nc4–+) 30.Qb2 Bg8–+) 29...Qc7 (29...Qf8?! 30.Ne5 Rc7 31.Bc4–+) 30.Nb6 Qb6 (30...Bf8?! 31.Nc8 Bc8 32.Rc1–/+) 0–1. Steffens,Olaf (2240) – Martens,M (2410), 8th OGD Prinsenstad, 2015.

6.c4 0-0 7.Be2 Nd7 8.d4 ed4 9.Bd4 (9.Nd4? c5–+) 9...Nf6 10.0-0 Nf5 11.Bb2 Re8 12.Qc2 Qe7 13.Bd3 a5 14.Nc3 c6 15.Na4 White prepares c5 15...Qc7 16.e4 Nh6 17.c5 ab4 (17...dc5 18.Nc5 Bg4 19.Nd4+=) 18.ab4 dc5 19.bc5 Bg4 20.Nd2 Qf4 e4 becomes the focus of attention 21.Rae1 (21.Nc4 Bd7+=) 21...Be6 22.Nf3 White plans e5 22...Bg4 23.Nd4 Rad8 24.g3 (24.e5 Nd5 (24...Re5? 25.Re5 Qe5 26.Nc6+-) 25.Re4 Qg5=) 24...Qg5 (24...Qc7 25.e5 Nd5 26.f4+=) 25.f4= Qh5 26.e5 Nd5 27.Nb6 Nb4 28.Qc3 Nd3 29.Qd3 Bf5 30.Qe2 (30.Qb3 Bf8 31.Qc4 Be6=) 30...Bg4 (30...Qe2 31.Ne2 Bf8 32.Na4–/+) 31.Qf2 (31.Qc4 Nf5=) 31...Nf5 (31...Bh3 32.Qf3 Ng4 33.Rf2 Nf2 34.Qh5 gh5 35.Kf2–/+) 32.Nc4 Bf8 (32...Nd4 33.Bd4 Bh3=) 33.Nd6 (33.Nf5 Bf5 34.Nd6+=) 33...Bd6?? (better is 33...Nd6 34.cd6 Bh3–/+) 34.ed6+/– (worse is 34.cd6 Bh3–/+) 34...Ng7 35.Nc6?? (better is 35.f5!?+/–) 35...bc6= 36.Qd4 Qh6 37.Re8 Re8 38.d7 Bd7 39.Qd7 Rf8? (39...Re2 40.Rf2 Re1 41.Kg2 Re6+/–) 40.Qc6+- Ne6 41.Qe4 Qh5 (41...Nc5?? 42.Qe5 f6 43.Qc5+-) 42.Rc1 Rd8 43.Qe5 Qe5 (43...Rd1 44.Rd1 Qd1 45.Kg2+-) 44.Be5 (44.fe5?! Rb8 45.Ba3 Rb3+=) 44...Rc8 45.c6 Kf8 46.Kf2 Ke7 47.Ke3 Nd8 48.c7 Ne6 49.Bd4 (49.h3!?+/–) 49...Rc7= 50.Rc7 Nc7 51.Ke4 Ke6 52.h3 f5 53.Kf3 Nb5 ½–½. Logvinov,Kirill (1795) – Forova,Tatiana (1865), RUS–ch Students, 2009.

6.c4 Nd7 7.Be2 b6 8.d3 Bb7 9.0-0 0-0 10.Nbd2 Nc6 11.e4 Re8 12.Re1 Nf8 13.Nf1 Ne6 14.Ne3 Ncd4 15.Nd4 Nd4 16.Bf1 Ne6 17.g3 Rf8 18.Bg2 f5 19.ef5 Bg2 20.Kg2 gf5 21.Qh5 Qg5 Black prepares f4 22.Qg5 Ng5 23.h4 Ne6 24.Rad1 c6 25.Nf1 f4 26.Nd2 fg3 27.fg3 Rae8 28.Re2 1–0. Fournier,Frederic (2090) – Maupin,Gervais (1850), Grand Prix Oise, 2008.

6.Bc4 0-0 7.Nc3 Bg4 8.h3 Bd7 9.Ne2 e4 10.Bg7 ef3 11.Bf6 fe2 12.Qe2 Be6 13.Bd3 Nd7 14.Bg5 f6 15.Bh6 Rf7 16.g4 Ne5 17.Be4 f5 18.Bb7 Rb8 19.Qa6 Rb7 20.Qb7 Bd5 21.Qa7 Bh1 22.0-0-0 Bf3 23.Rg1 fg4 24.hg4 Nd5 25.e4 c5 26.Qa6 Nc7 27.Qb6 Nc4 28.Qa7 cb4 29.ab4 Nb5 30.Qa2 d5 31.Qa6 Nd4 32.Re1 Rc7 33.ed5 Nd2! 34.Kd2 Bd5 35.Re3 Nf3 36.Kc1 g5?? 37.Qe2=+ Kf7?? 38.Rf3 Bf3+= 39.Qf3 Qf6 40.Qf6 Kf6 41.Bf8 Ke5=+ 42.Kd2 Ke4 43.b5 Rb7 44.c4=+ Kd4 45.c5 Rb5 46.c6? Rb2–+ 47.Kc1 Rf2 48.Be7 Kd3 49.Bg5 Rc2 50.Kd1 Rc6 51.Bd2 h6 52.Bf4 Ke4 53.Bd2 Kf3 54.g5 h5 55.Ke1 Kg2 56.Ke2 h4 57.Bf4 h3 58.Ke3 Rg6 59.Ke4 Rg5!! (60.Bg5 h2–+) 0–1. Filippov – Prakapets, Nikopol, 1984.

6.d4 0-0 7.Bd3 Bg4 8.h3=.

6.d4 0-0 7.de5 Nbc6 8.Nbd2 Ne5 9.Ne5 Be5 10.Be5 de5 11.Nf3 f6 12.Bc4 Kg7 13.Qe2 c6 14.h4 (14.Rd1 Qc7+=) 14...h6 15.Rd1 Qc7 16.Nd2 b5 17.Ba2 f5 18.Nb3 Be6 19.Qf3 (better 19.Nc5!? Ba2 20.Rd7+=) 19...Rad8 20.0-0 e4 21.Qe2? (better 21.Qh3!?=+) 21...Bc4-+ 22.Qe1 Rd1 (better 22...Kh7-+) 23.Qd1 Bf1 24.Qf1? (better 24.Nc5 Qe5 25.Ne6 Kg8 26.Nf8 Kf8 27.Qd8 Kg7 28.Kf1=) 24...Qe5-+ 25.Nd4 Kh7 26.Ne6 (26.h5 Rf6-+) 26...Rf6 27.Nc5 Rd6 28.Bb3 g5 29.hg5 hg5 30.Qe2?? (30.Qe1 Rh6 31.g3 a5-+) 30...g4 (30...Qa1!? 31.Qf1 Rd1 32.Qd1 Qd1 33.Kh2-+) 31.g3?? (31.Qe1 Rh6 32.g3 a5-+) 31...Ng8 (better 31...Qa1 32.Qf1 Rd1 33.Qd1 Qd1 34.Kg2 Qc1-+) 32.Kg2 (32.Qe1 Rh6-/+) 32...Nf6 (32...Qa1!? 33.c3-+) 33.Qf1 (33.Nb7 Rd7 34.Nc5 Re7-/+) 33...Nh5 (33...Nd7 34.Nd7 Rd7 35.a4-+) 34.Qh1 Rh6 35.Qd1 Rd6 (35...Qd6 36.Qe1-+) 36.Qh1-/+ Rh6 37.Qd1 Nf6 (better 37...Ng7!? 38.Qd4 Qd4 39.ed4 Kg6-+) 38.Qd8=+ Qe8 39.Qc7 Kg6 40.Ne6 Nh5 (40...Rh7 41.Qe5 Qh8 42.Nd4 Rh2 43.Kf1+=) 41.Qd6 (41.Qa7!? Rh8 42.Nd4+/-) 41...Kh7= 42.Qc7 Kg6 43.Nd8 (better 43.Qa7 Rh8 44.Nd4+/-) 43...Qe5?? (better 43...Rh7 44.Qd6 Nf6 45.Nc6 Kg7+=) 44.Qe5+- Nf6 45.Bf7 (45.Qe7 Rh2 46.Kh2 f4 47.Qf7 Kh6 48.Qf6 Kh7 49.Ne6 fg3 50.Kg3 c5 51.Qg7) 45...Kg7+- 46.Be8 Rg6 47.Ne6 Kh6 48.Bg6 (48.Qf4 Kh7 49.Qc7 Nd7 50.Qd7 Kh6 51.Bg6 Kg6 52.Qg7 Kh5 53.Qg5) 48...Nh5 (48...Kg6 49.Nf4 Kf7 50.Qe6 Kf8 51.Qf6 Ke8 52.Ng6 Kd7 53.Ne5 Kc7 54.Qc6 Kd8 55.Qd7) 49.Bh5 Kh5 50.Qf5 (50.Qf5 Kh6 51.Qf6 Kh5 52.Nf4; 50.Qf6 f4 51.Nf4) 1-0. FeegLood (2760) – hiimgosu, lichess.org, 2015.

6.d4 0-0 7.de5 de5 8.Qd8 Rd8 9.Be5 Bg4 10.Bg7 (10.Bc7?! Rd7 11.Bb8 Ba1=) 10...Kg7 11.Nbd2 Bf3 12.Nf3 Nbc6 13.c3 Ne5?? (better 13...a6+/-) 14.Ne5+- f6 15.Nf3 Rd7 (15...f5 16.Bc4+-) 16.Nd4 Rad8 (16...Rd6 17.0-0-0+-) 17.Ne6 Kf7 18.Nd8 Rd8 19.Bc4 Kg7 20.Rd1 Re8 (20...Rd1 21.Kd1 Nf5 22.Kc2+-) 21.Rd7 Kf8 22.Rc7 (better 22.Be6 a6+-) 22...Nf5 (22...Rc8 23.Rc8 Nc8 24.a4+-) 23.Rf7 Kg8 24.Re7 (better 24.Rb7 Kh8 25.Ra7 Rc8+-) 24...Kf8 25.Re8 (25.Rb7!? Nd6 26.Rc7 Re7 27.Re7 Ke7+-) 25...Ke8 26.Ke2 Ne7 (26...Ke7 27.Bd5 b6 28.c4+-) 27.Bd3 (27.Rd1!? Nc6+-) 27...Nc6 28.Rd1 Ne5 (28...Ke7 29.Be4 f5 30.Bc6 bc6 31.c4+-) 29.Bb5 (29.Be4!? b6+-) 29...Ke7 30.f4 Nd7 (30...Nc6 31.Bc6 bc6+-) 31.Rd7 Ke6 32.e4 (32.Rh7 a5+-) 32...f5 33.e5 g5 34.Ke3 (34.Rh7 gf4 35.Bc4 Ke5 36.Rh6 f3 37.Kf3 f4 38.Kg4 f3 39.Re6) 34...gf4 35.Kf4 h5 36.Rb7 (36.Rc7 h4 37.Bc4) 36...h4 (36...Kd5 37.Rc7 Ke6 38.Bc4) 37.Bc4 1-0. FeegLood (2620) - kankertyfus (1770), lichess.org, 2015.

6.c4 e4 7.Nd4=.

6.Bc4 0-0 7.0-0 Nbd7 8.Nc3 a6 (8...e4 9.Nd4=) 9.d4 Nb6 10.Bb3 e4 11.Ng5 (11.Nd2 Bg4 12.Ne2 a5=) 11...d5 12.Kh1 (better is 12.a4!?+=) 12...Ng4–+ 13.Nh3 Qd6 14.Nf4 (14.g3 Ne3! 15.fe3 Bh3–+) 14...c6 (better is 14...g5!? 15.h3 gf4 16.hg4 fe3–+) 15.h3–/+ Nf6 (15...g5!? 16.hg4 gf4–/+) 16.Qe2 Re8 17.Na2 Bh6 18.Bc1 (18.a4 Bf4 19.ef4 Nh5+=) 18...g5–/+ 19.Nh5 Nh5 (19...g4!? 20.Nf6 Qf6 21.hg4 Qh4 22.Kg1 Bg4–+) 20.Qh5= Re6 (20...Qg6 21.Qg6 hg6 22.a4=) 21.Qe2 (better is 21.a4!?=) 21...Bg7+= 22.f4 ef3 23.Rf3 (23.Qf3 Rf6 24.Qe2 Rf1 25.Qf1 g4–/+) 23...Rh6 (23...Bd4!? 24.Rb1 Re7–/+) 24.Qf2 Be6 25.Qg3 Qe7 (25...Qg3 26.Rg3 g4 27.e4–/+) 26.e4 Rg6 (worse is 26...de4 27.Bg5 Qg5 28.Qg5 ef3 29.Be6 (29.gf3?! Rh3 30.Kg2 Rh6=) 29...fe6 30.Qe7+/–; 26...Bd4? 27.Bg5 Qg5 28.Qg5 Rg6 29.Qe7 Ba1 30.Qb7 de4 31.Be6 fe6 32.Rf1+- (32.Qb6?! ef3 33.gf3 e5+=)) 27.ed5 Nd5 28.Bd5 Bd5 29.Re3 Qd7 30.c3 (30.Bb2 f5 31.Ree1 f4–/+) 30...g4 (30...f5!? 31.Re1 f4–+) 31.h4–/+ Rf6 32.Re1 h5 (32...Re6 33.Re3 Re3 34.Be3 Qf5–/+) 33.Bg5= Re6 34.Re6 Qe6 35.Nc1 f6 36.Bf4 Rf8 (36...a5 37.ba5 Ra5 38.Bc7=) 37.Nd3+= b6 38.Re1 Qd7 (38...Qf5 39.Bc7+=) 39.Bd6 (39.Bc7 b5+/–) 39...Re8 40.Re8 Qe8 41.Bc7 Qe2 (better is 41...b5+=) 42.Bb6?? (42.Nf4 Qd1 43.Kh2 Bf7 44.Bb6 Qa4+/–) 42...Bc4?? (42...Qf1 43.Kh2 Bh6–+) 43.Nf4+/– Qf1 (43...Qd1 44.Kh2 Bf7 45.Bc5+/–) 44.Kh2+- Bf7 45.Nd3 (better is 45.a4+-) 45...Bh6 46.Bc7 Bd5 47.Bf4 Bg2! 48.Qg2 (48.Qg2 Qd3 Deflection (48...Bf4 Decoy; 48...Qd3 Overloading)) 48...Bf4 49.Nf4 Qf4 50.Kg1 Qe3 51.Qf2 Qc1 (51...Qc3?! 52.Qf6 Qe3 53.Kg2 Qe4 54.Kh2 Qc2 55.Kg3 Qb3 56.Kg2 Qd5 57.Kg1=) 52.Kg2 Kg7 (52...Qa3!? 53.Qf6 Qb2 54.Kf1 Qc1 55.Kg2 Qd2 56.Kf1 Qd3 57.Kg2 Qh3 58.Kg1 Qc3 59.Qg5 Kf8 60.Qd8 Kf7 61.Qd7 Kf6 62.Qd6 Kg7 63.Qe7 Kh8 64.Qe5 Kg8 65.Qe8 Kg7 66.Qe7 Kg8 67.Qe8 Kg7 68.Qe7=) 53.Qe2= Qc3 54.Qe7 (54.Qa6 Qd2 55.Kf1 Qf4 56.Ke2 Qe4 57.Kf1 g3 (57...Qd4?! 58.Qb7 Kg6 59.Qc6+=) 58.Qa7 Kg6–+) 54...Kg6 55.Qe8 Kh6 56.Qf8 Kg6 57.Qe8 ½–½. Sandercock,E Barry (1645) – Deakin,Clive, Beacon Seniors op, 2006. (=1.a3 e5 2.b4 g6 3.Bb2 Bg7 4.Nf3 d6 5.e3 Nf6)

6.d3 0-0 7.c4 Nbd7 8.Be2 c6 9.Nc3 b6 10.0-0 Bb7 11.a4 Qc7 12.b5 c5 13.Re1 d5 14.cd5 Nd5 15.Nd5 Bd5 16.e4 Bb7 17.Rc1 Rad8 18.Qc2 Rfe8 19.Bf1 h5 20.d4 (20.Ra1!?+=) 20...ed4=+ 21.Nd4 (21.Bd4 Bd4 22.Nd4 Nf6=+) 21...Ne5 (21...Qe5 22.f4 Qf4 23.Nc6 Bb2 24.Qb2 Bc6 25.bc6-+) 22.Nc6 (22.f4!?=) 22...Bc6-/+ 23.bc6 Nc6 (worse 23...Qc6 24.Bb5 Qf6 25.Be8 Re8 26.Be5 Qe5 27.a5+/-) 24.Bg7 Kg7 25.Bb5 Re6 26.h3 Nd4 27.Qc3 Kg8 (27...Qf4 28.Bd3-/+) 28.Bc4 Red6 29.Bd5 a5?? (29...Qd7 30.a5-/+) 30.Qg3?? (better 30.Qd4! Qd7 31.Qc4+-) 30...Qd7 31.Qf4 (better 31.Bc4!?=+) 31...Ne6-/+ (31...Qa4?! 32.Bf7 Kg7 33.Bc4=+) 32.Qh6 (32.Qf3 Qa4 (32...Rd5?! 33.ed5 Qd5 34.Qg3=) 33.Bc4 Qc6-+) 32...Qa4-+ 33.g4 (better 33.Bc4-+) 33...hg4 34.hg4 Qd4 (34...Rd5 35.ed5 Qg4 36.Kf1 Rd5 37.Qh1-+) 35.Rcd1 (35.Qh4 Nf4 36.Rcd1 Qe5-+ (36...Rd5 37.ed5 Nd3 38.Qd8 Kg7 39.Rd3 Qd3 40.g5+-; 36...Nd5 37.Rd4 cd4 38.ed5 Rd5 39.Qh6+-)) 35...Qg7 (35...Qh8 36.Qh8 Kh8 37.Kf1-+) 36.Qh3 Nf4 37.Qg3 (37.Qb3 Qh7 38.Qf3 Rf6-+ (38...Nd5?! 39.Rd5 Qh4 40.Red1 Rd5 41.ed5-+)) 37...Nd5 (37...Qh6!? 38.Qf3-+) 38.ed5 Rd5?? (better 38...c4-+) 39.Rd5= Rd5 40.Qb8 Kh7 41.Qb6?? (better 41.Kg2=+) 41...Qd4-+ 42.Re3 (42.Qb3 Qg4 43.Qg3 Qg3 44.fg3-+) 42...Qg4 43.Rg3 Rd1 44.Kg2 (44.Kh2 Qe4 45.Rf3 Qe5 46.Kg2 Qg5 47.Rg3 Qd5 48.Rf3-+) 44...Qe4 45.Kh2 (45.Rf3 Rd3 46.Qf6 Rf3 47.Qf3 Qf3 48.Kf3-+) 45…Qh1 0-1. brucepeng (2020) - sandrodaniel (2020), lichess.org, 2021.

6.d3 0-0 7.Nbd2 Bg4 8.c4 Nc6 9.Be2 Re8 10.0-0 a6 11.h3 Bd7 12.e4 Nh5 13.Nh2 Nf4 14.Rc1 Qg5 15.Bf3? (better is 15.Ng4+=) 15...Bh3–+ 16.g3? (16.Ng4 Ng2! 17.Bg2 Bg4–+) 16...Bf1 (16...Nd3 17.Rb1 Bf1 18.Nhf1–+) 17.Qf1 (17.Ndf1 a5 18.b5 Nd4–+) 17...Ne6 (17...Nh3! 18.Qh3 Qd2 19.Rb1 Qd3 20.Qf1–+) 18.Rd1 Ncd4 19.Bg2 b6 20.Nhf3 Nf3 21.Nf3 Qf6 22.d4 ed4 23.Nd4 Nd4 24.Bd4 Qe6 25.Bg7 Kg7 26.Qd3 Rad8 27.Kh2 h5 28.f3 Qf6 29.Rd2 Rh8 Black prepares the advance h4 30.Bh3 g5 31.Bf5 g4 (31...h4 32.Kg2–+) 32.f4 h4 33.Bg4 hg3 1–0. Fournier,Frederic (1995) – agueria (1815), Echecs21, 2003.

6.Be2 0-0 7.0-0 b6 8.d3 c5 9.c4 Nc6 10.b5 Ne7 11.e4 a6 12.a4 Qc7 13.Nc3 Bd7 14.Qb3 a5 15.Bc1 Kh8 16.Qd1 Ng4 17.h3 Nh6 18.Bd2 f5 19.Qc1 f4 20.Qd1 Bf6 21.Nh2 g5 22.Ng4 Nhg8 23.Nf6 Nf6 24.Bg4 Ng4 25.hg4 h5 (better is 25...Kg7!?=) 26.gh5+/– g4 27.g3 Rf7 28.f3 (28.gf4 ef4 29.Ne2 f3 30.Bc3 Kh7+/–) 28...Qc8 (better is 28...Rg8!? 29.gf4 gf3 30.Kf2 Bg4+=) 29.gf4+/– ef4 30.Ne2 gf3 31.Rf3 Bg4 32.Rf4 Rf4 33.Bf4 Bh5 34.Qf1 Qg4 35.Ng3 Rg8 36.Bd6+- Qe6 37.Qf4 Kh7 38.Rf1 Rg7 39.Be7 Qe7 40.Kg2 Kg8 41.Qf6 Qc7 42.e5 Bf7 43.Kf2 Rg6 44.Qf5 Qe7 45.Rh1 Qd8? 46.Nh5 Qd4 47.Kf3 Qd8 48.Nf6 Rf6 49.Qf6 Qd3 50.Kg2 Qe4 51.Qf3 Qc4?? 52.Qa8 Kg7 53.Qh8 Kg6 54.Qf6 1–0. Fournier,Frederic – Vlahovic,Dmitri, Open Paris FRA, 1999.

6.Be2 0-0 7.c4 Nbd7 8.d3 c5 9.b5 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 b6 13.0-0 e4 (13...Bb7!?=) 14.de4+= Ne4 15.Bg7 Kg7 16.Nbd2 (16.Nfd2 Nef6+=) 16...Ndf6 (16...f5 17.Qc2 Bb7 18.Ra1=) 17.Ne4 Ne4 18.Nd2 Nc3 (18...Bb7 19.Ne4 Be4 20.Bf3+=) 19.Qe1 (better is 19.Qa1!? Qf6 20.Bf3+/–) 19...Be6 20.Bd3 (20.Qa1 Qf6 21.Bf3 d5 22.cd5 Bd5 23.Bd5 Nd5 24.Qf6 Kf6=) 20...d5= 21.Qa1 d4 22.Nb1 Kg8 (better is 22...Nb1!? 23.Rb1 Re8=) 23.Nc3+/– de3 (23...dc3 24.Qc3 Qg5 25.f4+/–) 24.Ne4 (24.Qd1 Qd4 25.Ne2 Qd6 26.fe3 Rd8+-) 24...f5? (24...Qd3 25.Nf6 Kh8 26.Nd7 Kg8 27.Nf8 e2 28.Ne6 ef1Q 29.Qf1 Qf1 30.Kf1 fe6+=) 25.Nc5?? (better is 25.Qe5 Bd7 26.Nd6+-) 25...bc5+= 26.Rd1 ef2= 27.Kf2 Qh4 28.Kg1 Bc4 29.Qb1?? Re8 30.Bc4 Qc4 31.b6 Rb8 32.Rc1? Qd4 33.Kh1–/+ c4 34.h3 Rb6–+ 35.Qa2 Rb2 36.Qc4–/+ Qc4 37.Rc4 ½–½. Fournier,Frederic – Cadet,Yves, Match, 2012.

6.Be2 e4 7.Nd4 0-0 8.0-0=.

7.d3 b6 8.Be2 c5 9.b5 Bg4 10.Nbd2 Nfd7 11.h3 Bf3?? (better is 11...Bf5=) 12.Bf3+- (12.gf3?! a6=; 12.Nf3?! a6+=) 12...Nf6 (12...e4 13.Bg7 ef3 14.Qf3 Kg7 15.Qa8 Ne5+-) 13.Ba8 d5 14.cd5 Nd5 15.Bd5 Qd5 16.Nf3 c4 17.dc4 Qc4 18.Qe2 Qa4 19.0-0 a6 20.ba6 Na6 21.Be5 Be5 22.Ne5 Qe4 23.Qa6 (23.Qa6 Qe5 24.Qb6+-) 1–0. Fournier,Frederic (1895) – mamuta, Active, 2011.

7.d4 e4 8.Nfd2 c5=.

7.Be2 c6 8.0-0 Na6 9.d4+= e4 10.Nfd2 d5 11.Nc3 Nc7 12.b5 Be6 13.a4 Qd7 14.Ba3 Rfd8 15.Rb1 Nce8 16.a5 Rab8 17.Na4 Bg4 18.Nc5 (White prepares the advance a6) 18...Qc8 19.a6 Be2 20.Qe2 ba6 21.Na6 Ra8 22.Rfc1 cb5+/– 23.cb5 Qf5 24.Nb3 Nd7 25.Na5+/– Rdc8 26.Nc6 Bf6 27.Bc5 Nc5 28.Nc5 Nd6 29.Ra1 Nc4 30.Na7 Rcb8 31.Rcb1 Kg7 32.Na6 Rb7 33.Nc6 Bd8 34.Nd8 Rd8 35.Nc5 Rb6 36.Ra6 Rdb8 37.Rb6 Rb6 38.Qa2 Qc8 39.h3 Qc7 40.Na4 Rb8 41.Nc5 Rd8 42.Qa6 Rd6 43.Qa8 Rd8 44.Qa4 Rd6 45.Rc1 Qe7 46.Qb4 Rb6 47.Rb1 Rb8 48.Na4 Qb7 49.Nc3 Nb6 50.Ra1 Rc8 51.Ra6 Qb8 52.g3 Nc4? 53.Nd5+- Qb7 54.Nc3 Nd2 55.Ne2 Nf3 56.Kg2+- Qd7 57.b6 Rb8 58.Ra7 Qf5 (58...Qd8 59.Qe7 Qe7 60.Re7 Rb6 61.Nc3+- (61.Re4?! Ne1 62.Kf1 Nf3+/–)) 1–0. Labahn,Wolfgang – Bloess,Andre, Schleswig Holstein–ch qual, 1998.

7.Be2 e4 8.Nd4=.

7.Be2 e4 8.Ng1 =+.

7.Be2 Re8 8.Nc3 b6 9.d4 ed4 10.Nd4+= Bb7 11.Bf3 Bf3 12.Qf3 Na6 13.Nc6 Qd7 14.Rb1 Qe6 15.Nd5+/– Nd5 16.cd5 Qe4 17.Qe4 Re4 18.Bg7 Kg7 19.Rc1 Ree8 20.Rc4 f5 21.Kd2 Kf6 22.Rhc1 h5 23.Kd3 g5 24.h4 g4 25.Rf4+- Kg6 26.g3 b5 27.Rc2 Kf6 28.Nd4 Re5 29.e4 Kg6?! 30.Rf5 Rf5 31.ef5 Kf6 32.Rc5 dc5–+ (33.Nb5 cb4 34.ab4 c6 35.dc6 Nb4 36.Ke3 Re8 37.Kd4 Nc6 38.Kc5 Ne5–+; 32...Nc5?! 33.bc5 Rc8 34.c6–/+) 0–1. Luzuriaga,Norberto Horacio – Wantoch_Rekowski,Jacek, corr, 2002.

7.Be2 Bg4 8.d3 Nbd7 9.Nbd2 a5 10.0-0 ab4 11.ab4 Ra1 12.Ba1 Qa8 13.Qb3 Qa7 14.Bb2 Ra8 15.Ra1 Qb8 16.Ra8 Qa8 17.Qa3 Qa3 18.Ba3 d5 19.Kf1 c6 20.Ne1 Be6 21.c5 Nb8 22.Nc2 Ng4 23.h3 ½–½. Fournier,Frederic (1680) – Delerme,Raymond (1850), Open Paris FRA, 1998.

7.Be2 Bg4 8.h3 Bf3 9.Bf3 e4 10.Be2 c6 11.d3 ed3 12.Bd3 d5 13.c5 Ne4 14.Be4 (better is 14.Bg7!? Kg7 15.Be4 de4 16.Nc3+=) 14...Bb2+= (14...de4?! 15.Bg7 Qd1 16.Kd1 Kg7 17.Nd2=) 15.Ra2 Ba3 (15...de4?! 16.Rb2 a5 17.Rd2+=) 16.Na3 de4 17.Rd2 Qf6 18.0-0 Na6 19.Rd6 Qc3 20.b5 (20.Nc2–/+) 20...Qc5 (better is 20...cb5!? 21.Nb5 Qa5–/+) 21.ba6= Qa3 22.ab7 Rab8 23.Rd7 Qb4 24.Qb1 Qb1 (24...c5!?=) 25.Rb1+= f6 26.Ra1 (better is 26.Rc7+/–) 26...Rf7+= 27.Rf7 Kf7 28.Ra7 Ke7 29.Kf1 Kd7 30.Ke2 Kc7 31.Kd2 Rb7 32.Ra8 f5 33.Rh8 Kb6 34.Rd8 c5 35.Rc8 Kb5 36.Kc3 Rb6 37.Rc7 h5 38.f3 ef3 39.gf3 Rc6 Black plans c4 40.Rb7 Ka6 41.Rb8 Ka7 42.Rb2 Re6 43.Kd3 c4 44.Ke2? Ka6–/+ 45.Rb8 Rb6 46.Rc8 Kb5 47.Kd2 Kb4 48.Kc2 Re6 49.Rb8 Kc5 50.Rc8 Rc6 51.Re8 Kd5 52.Rd8 Rd6–+ 53.Rc8 g5 54.Kc3? Exerts pressure on the isolated pawn 54...Rc6 55.Rd8 Kc5 56.Rg8 g4 57.fg4 hg4 58.hg4 fg4 59.Rg4 Kb5 60.Rg5 Rc5 61.Rc5 Kc5 62.e4 Kd6 63.Kc4 Ke5 64.Kd3 Kd6 65.Kd4 Ke6 66.e5 Kd7 67.Kd5 Ke7 68.e6 Kd8?? 69.Kd6 Ke8 70.e7 Kf7 71.Kd7 Kf6 72.e8Q Kf5 73.Qe6 Kf4 74.Kd6 Kf3 75.Kd5 Kf4 76.Kd4 Kf3 77.Qe4 Kf2 78.Kd3 Kf1 79.Qe2 Kg1 80.Ke3 Kh1 81.Kf3 (81.Kf3 Kg1 82.Qg2) 1–0. Fournier,Frederic (1940) – rosiki (1990), Active (5/0), 2004.

5.e3 Ne7 6.Nf3 Nd7 (6...f6 7.fe5 fe5 8.Bc4=) 7.Be2 0-0 8.fe5 Ne5 9.Nc3 Nf5 10.0-0 Be6 11.Na4 b6 (11...a5 12.b5=) 12.Rc1 (12.b5 a6=) 12...Bd7 (12...c6 13.c4=) 13.Ne5 (13.Nc3 c6=) 13...de5= 14.b5 (14.Nc3 e4+=) 14...c5 (14...a6 15.c4=) 15.c4 (15.Nc3 Nd6+=) 15...Nd6 (15...a6 16.Nc3=) 16.Rc2 (16.Nc3 Be6 17.Qb3 a6 18.ba6 b5=+) 16...Be6 (16...a6 17.Nc3=+) 17.Qa1 (17.d3 a6 18.ba6 Qg5 19.Nb6 Nf5+=) 17...Re8 (17...a6 18.Be5 Be5 19.Qe5 ab5 20.Nb2 Ra3 21.cb5–/+) 18.Re1 (18.d3 Nf5 19.Rf3 Qg5=+) 18...Qg5 (18...a6!? 19.Bf3 Bf5–/+ (19...Nc4?! 20.Ba8 Qa8 21.Rc4 Bc4 22.Nb6=+)) 19.Bf1 Rad8 (19...f6 20.d4 Nf5 21.dc5 Ne3 22.Rc3 Nf1 23.Rf1=+) 20.Nc3 (20.d3 Rf8=+) 20...f5 (20...h6=+) 21.Nd5 Bd5 22.cd5=+ Qe7 23.a4 e4 24.Bg7 Qg7–/+ 25.Qa2 g5 26.a5=+ f4 27.ab6 ab6=+ 28.Qa6 Qc7 29.Ra2 Re7 30.Rea1 Nf5 31.Qa4 f3 32.gf3 Nh4 33.d3 ef3 34.Qc4 Qd6 35.e4=+ Rf8 36.Bh3?? (better is 36.Qc1=+) 0–1. Kutuzov,Denis – Potapov,Pavel, It (open) Moscow (Russia), 2007.

5.e3 Nf6 6.fe5 Ng4 7.Nf3=.

5.fe5 de5 6.Nf3 Nd7 7.e4 a5 8.b5 c6 9.bc6 bc6 10.Bc4 c5 (10...Nb6 11.Bb3= (worse is 11.Be5 Be5 12.Bf7 Kf8–/+)) 11.Bd5 (11.Nc3 Rb8 12.Rb1 Ngf6+=) 11...Ra7 (11...Rb8!? 12.Ra2 Ngf6=) 12.Nc3+= Ne7 13.Nb5 Ra6 14.Bc4 Bb7 15.d3 Ra8?? (better is 15...Qb8+=) 16.Nd6+- Kf8 17.Nf7 (worse is 17.Nb7 Qc7 18.Ng5 Qb7+-) 17...Qb6 18.Rb1 (worse is 18.Be5 Ne5 19.N3e5 Be5 20.Ne5 Kg7+-; 18.N3e5?! Qb2 19.Nd7 Ke8+-) 18...Rg8 19.0-0 Qc6 (19...Bc8+-) 20.N7e5 (20.N3e5 Nb6 21.Ng5 Nf5 22.Nh7 Ke8 23.Bf7 Ke7 24.Nc6 Kf7 25.ef5 Bc6 26.fg6 Ke7 27.Qe1 Kd8+-) 20...Ne5 (20...Qd6 21.Nd7 Ke8 22.Bg7 Qd7+-) 21.Ne5 Qf6 22.Nd7 (22.Nd7 Ke8 23.Bf6+-) 1–0. Fournier,Frederic (1855) – carlosdiazbalza, Active, 2011.

5.Nf3 Qe7 6.e3 Bg4 7.h3 (7.Be2!?=) 7...Bf3=+ 8.Qf3 (8.gf3 Qh4 9.Ke2=+) 8...Nc6 (8...e4 9.Bg7 ef3 10.gf3 f6 11.Bh8 Qf8-+) 9.Nc3 e4 10.Qe2 (10.Qg3 Qd7=) 10...f5 11.0-0-0 Nf6 (11...0-0-0 12.Qc4=) 12.Qc4 Qf7 (12...Nd7 13.g4=) 13.Qf7+= Kf7 14.Bc4 Ke7 15.g4! Rhd8 (15...fg4 16.Nd5 Deflection) 16.g5 Ne8 17.Nd5 Kf8 18.Bg7 Kg7 19.h4 (19.d3 ed3 20.cd3 Nb8+/-) 19...Rd7 20.h5 Ne7 21.Ne7 Re7 22.hg6 hg6 23.Rh6 c6 24.Rdh1 d5 25.Bb3 Kf7 26.Rh8 Rd8 (26...Ke6!?+=) 27.R1h7+/- Ke6 28.Rh6 (28.Re7 Ke7 29.Rh7 Kd6+/-) 28...Rg7+= 29.c4 Ke7 (29...dc4 30.Bc4 Ke7 31.R6h7+=) 30.cd5+/- cd5 31.Ba4 (31.d4 ed3 32.Kd2 d4 33.ed4 Rd4+/-) 31...Nc7 (31...Nd6 32.R6h7 Rh7 33.Rh7 Nf7 34.d4+=) 32.R8h7 (32.R6h7!? Ne6 33.Rd8 Kd8 34.Rg7 Ng7 35.Bb3+/-) 32...Kf7+= 33.Rg7 (33.Bb3!?+=) 33...Kg7=+ 34.Kb2 b5 (34...d4 35.Rh2=+) 35.Bb3= d4 36.Rh2 (36.Rh1 Nd5=) 36...de3 (36...Rd6 37.Rh1=) 37.de3= Rd3 38.Re2 Nd5 39.Bc2? (better 39.Bd5 Rd5 40.Rc2=) 39...Re3-+ 40.Rd2 Nb4?? (better 40...Nf4 41.Rd7 Kf8 42.Ra7 Rg3-+) 41.Rd7+/- Kf8 42.ab4 Re2 (better 42...Rf3!? 43.Ra7 Rf4 44.Ra8 Kg7+=) 43.Ra7+- e3 (43...Rf2 44.Ra6 Kg7 45.Rb6 Rf4 46.Rb5+/-) 44.Ra6 Rf2 45.Rf6?? (better 45.Kc3 Rf4 46.Bd3+- (46.Rg6?! Rc4 47.Kd3 Ke7+/-)) 45...Ke7+= 46.Kc3 Rf4? (46...e2 47.Kd2 e1Q 48.Ke1 Rc2 49.Rg6=) 47.Kd3?? (47.Bd3 Rg4 48.Rg6 f4+-) 47...e2?? (better 47...Rc4 48.Bd1 f4+=) 48.Ke3?? (better 48.Ke2 Rb4 49.Rg6+-) 48...Re4!-+ 49.Be4 e1Q 50.Kd4 Qe4 (better 50...Qb4!? 51.Ke3 Qe4 52.Kf2-+) 51.Kc5 Qe5 52.Kb6 Qf6! 53.gf6 Kf6 54.Kb5 f4 55.Ka5 (55.Kc4 Ke5 56.b5-+) 55...f3 56.b5 f2 (better 56...Ke5 57.b6 Kd6 58.b7-+) 57.b6 f1Q 58.b7 Qb1 59.b8Q Qb8 60.Ka6 Qc7 (60...Qc7 61.Kb5 g5 62.Ka4 Qc4 63.Ka5 g4 64.Kb6 g3 65.Kb7 g2 66.Kb8 g1Q 67.Kb7 Qg7 68.Kb6 Qgc7) 0-1. black_bishop_88 (2530) - Danil_Mark (2490), lichess.org, 2020. (=1.a3 e5 2.b4 g6 3.Bb2 Bg7 4.f4 d6)

6.e3 Qe7 A) 7.Bb5 A1) 7...a6 8.Be2 Nb6 9.c4 Bd7 10.Nc3 Be6 11.Qb3+=; A2) 7...c6 8.Be2 Ngf6 9.fe5 de5 10.0-0 0-0 11.Nc3=; A3) 7...Ngf6 8.fe5 de5 9.0-0 e4 10.Nd4 c6 11.Be2=; B) 7.Bc4 B1) 7...Nb6 8.Bb3 Bg4 9.fe5 de5 10.e4 f5 11.Qe2=; B2) 7...Ngf6 8.0-0 e4 9.Nd4 0-0 10.b5 Nb6 11.Bb3=; B3) 7...f5 8.fe5 Ne5 9.Ne5 de5 10.0-0 Be6 11.Qe2=; C) 7.Be2 C1) 7...a5 8.fe5 Ne5 9.Nc3 Nf6 10.0-0 Be6 11.Nb5+=; C2) 7...Nb6 8.c4 Bd7 9.Nc3 Be6 10.Qb3 0-0-0 11.0-0+=; C3) 7...Ngf6 8.fe5 Ne5 9.0-0 Bd7 10.Bd4 Nc6 11.c3=.

6.e3 Bf6 A) 7.Nc3 ef4 8.ef4 Ne7 9.Be2 Nd5 10.Nd5 Bb2 11.Rb1=; B) 7.d4 ed4 8.ed4 Qe7 9.Be2 Nb6 10.0-0 Qe3 11.Kh1=; C) 7.fe5 Ne5 8.Nc3 Be6 9.Be2 Qe7 10.0-0 0-0-0 11.Nd4+=.

6.e3 Nh6 7.Bc4 (7.Be2 0-0 8.0-0 Nf5=) 7...0-0 8.0-0 Nb6 ½–½. Nemes,Zoltan (2025) – Baranyai,Szabolcs Jr (2185), Hajduboszormeny op, 1996.

6.fe5 de5 7.e3 Ne7 (7...Ngf6 A) worse 8.Ne5 Nh5 9.d4 Qh4 10.Kd2 Ne5 11.de5 Bg4–/+; B) worse 8.Be5 Ne5 9.Ne5 Nd5 10.Bb5 c6 11.Nc6 Qh4 (11...bc6?! 12.Bc6 Kf8 13.c3=) 12.g3 Qe4 13.Nd4 Ke7–+; C) 8.Be2=) 8.c4 (8.Bc4 0-0=) 8...0-0 9.Be2 c5 (9...Re8 10.e4=) 10.b5 (10.0-0 Nc6=) 10...b6 (10...a6 11.0-0=) 11.Nc3 (11.0-0 Bb7=) 11...Bb7 (11...e4 12.Ng5 Bb7 13.0-0=) 12.0-0 (12.e4 f5 13.Ng5 Nd5 14.ed5 Qg5=) 12...h6 (12...e4 13.Ne1=) 13.Qb3 (13.d3 f5=) 13...Qc7 (13...e4 14.Ne1=) 14.e4 f5 15.Nd5 (15.d3 a6=) 15...Nd5 16.ed5 e4 (16...Qd6 17.d3=) 17.Ne1 (17.Bg7 Kg7 18.Ne1 f4=) 17...Bb2 18.Qb2 Qe5 19.Qe5 (19.Qc1 a6 20.Rb1 ab5 21.Rb5 Ba6=) 19...Ne5 20.Nc2 (20.d3 a6 21.ba6 Ba6=) 20...a6=+ 21.a4 ab5 (21...f4 22.Rfd1=+) 22.ab5= Ra1 (22...Kg7 23.Rfd1=) 23.Ra1 Ra8 (23...f4 24.Kf2=) 24.Ra8+= Ba8 25.Ne3 (25.g3 Bb7+=) 25...f4 (25...Bb7!?=) 26.Nd1+- Kf7 27.Nc3 f3 (27...Ke7 28.Ne4 Bb7 29.Nc3+-) 28.gf3 (28.Bf1 g5+-) 28...ef3 29.Bf1 Bb7 (29...Ke7 30.Na4 Bb7 31.Nb6+-) 30.Na4 g5 (30...Ke7 31.Nb6 Kd6 32.h3+-) 31.Nb6+- Ke7 32.Kf2 g4 (32...Kd6!?+-) 33.Ke3 (33.Ke3 h5 34.Ke4+-) 1–0. chrissouthall (1770) – rilke (1730), gameknot.com, 2018.

7.Bc4 0-0 8.fe5 de5 9.0-0 Nf5 10.e4 Nd6 11.Qe2=.

7.Bc4 a5 8.0-0 (8.fe5 0-0 9.0-0 Ne5 10.Ne5 de5 11.Nc3+=; 8.e4 0-0 9.fe5 Ne5 10.Ne5 Nc6 11.0-0=) 8...ab4 (8...0-0 9.fe5 Ne5 10.Ne5 de5 11.Nc3+=) 9.ab4 (9.fe5 0-0 10.ab4 Ra1 11.Ba1+=) 9...Ra1 10.Ba1 0-0 (10...f6 11.Nc3+=) 11.fe5 Ne5 12.Ne5 de5 13.Nc3 c6 14.Rf2 Nf5 15.Qf1 Qe7 16.b5 Be6 17.Be6 Qe6 18.bc6 Qc6 19.g4 Nd6 20.d3 e4 21.Ne4 Ne4 22.de4 Ba1 23.Qa1 Qe4 24.Qd4 Re8 25.Qd7 Re7 26.Qd8 Kg7 27.Qd4 Kh6 28.Qe4= Re4 29.Rf7 Rg4 30.Kf2 Rb4 31.Ke2 b6 32.Kd3 Rh4 33.Rf2 b5 34.e4 Rh3 35.Kd4 Rh4 36.Kd5 Kg7 37.e5 Rh5 38.Kd6+- Rf5?? 39.Rf5 gf5 40.e6 f4 41.e7 f3 42.e8Q f2 43.Qb5 (43...Kf6 44.Qe5 Kg6 45.Qg3 Kh5 46.Qf2 Kg5 47.Ke6 h6 48.Qf5 Kh4 49.c4 h5 50.Qf4 Kh3 51.Qg3) 1–0. fuiste – albertho, ajedrez21.com, 2001.

7.Bc4 d5 8.Bb3 (8.Ba2 f6 9.0-0 c6 10.fe5 Ne5 11.Ne5=; 8.Be2 f6 9.0-0 0-0 10.Nc3 Nb6 11.Qe1=) 8...f6 9.0-0 c6 10.Qe1 Qb6 11.fe5 +=.

7.Bc4 f6 8.Nc3 (8.0-0 Nb6 9.Bb3 ef4 10.ef4 d5 11.Re1+=; 8.Bb3 d5 9.0-0 c6 10.Qe1 Qb6 11.fe5+=) 8...Nb6 9.Bb3 d5 10.0-0 e4 11.Nd4 +=.

7.Be2 0-0 8.0-0 a5 (8...ef4!? 9.Bg7 Kg7 10.ef4 Nd5=) 9.fe5+= de5 10.Nc3 h6 11.Qe1 e4 12.Nd4 c5 13.Nb3 cb4 (13...Nc6 14.b5 Ne7 15.a4+=) 14.ab4 Nc6 15.ba5 Na5 16.Nd4 Nc5 17.Ba3 b6 18.Bc5 bc5 19.Nc6 Qc7 20.Nd5 Qd6 21.Nce7 Kh7 22.Nc8 Rfc8 (worse 22...Qd5 23.Nb6 Qe6 24.Na8 Ba1 25.Qa1 Ra8 26.Qc3+=) 23.c4 f5 24.Rd1 Rab8 (24...Rcb8 25.d3 Be5 26.de4 Bh2 27.Kh1+/-) 25.Qh4 (25.d3 ed3 26.Bd3 Qa6+=) 25...Nc6 26.g4 fg4 27.Bg4 Rf8 28.Qg3 (28.Bh3!?=) 28...Ne5 29.Be2 Qe6 30.h4 (30.Nf4 Qe8=+) 30...h5 (30...Rf1!? 31.Kf1 Rb2-/+) 31.Nf4= Qf5 (31...Qe8 32.Qg2 Nd7 33.Nh3 Rf1 34.Rf1=) 32.Nd5 (32.Nh5 Nf3 33.Bf3 gh5 34.Bg2+-) 32...Nf3 33.Bf3 ef3 34.Nf4 Be5 35.Rf3 Qe4 36.Rdf1 Rg8 (36...Rfd8 37.R3f2 Rb1 38.Qg5 Rf1 39.Kf1+=) 37.Qg5 (37.d3 Qf5+/-) 37...Rbf8? (better 37...Rbe8!?+/-) 38.d3 (38.d3 Bf4 39.de4 (39.Rf4?! Qe3 40.Kg2 Rf5=) 39...Bg5 40.Rf8 (worse 40.hg5 Re8=) 40...Bh4 41.Rg8 Kg8 42.e5+-) 1-0. black_bishop_88 (2615) - Gettingold72 (2610), lichess.org, 2020. (=1.a3 e5 2.b4 g6 3.Bb2 Bg7 4.f4 d6 5.Nf3 Nd7 6.e3 Ne7)

7.Be2 0-0 8.fe5 Ne5 9.Ne5 de5 10.Bc4 Nd5 11.0-0=.

7.Be2 a5 8.0-0 (8.fe5 Ne5 9.Ne5 de5 10.0-0 ab4 11.ab4=; 8.b5 0-0 9.fe5 Ne5 10.Ne5 de5 11.Nc3=) 8...0-0 9.fe5 Ne5 10.Nc3 Nd5 11.Nd4=.

7.Be2 f6 8.0-0 (8.Nc3 d5 9.0-0 0-0 10.fe5 fe5 11.e4=; 8.fe5 fe5 9.0-0 0-0 10.e4 c6 11.Nc3=) 8...0-0 9.Nc3 c6 10.Qe1 d5 11.e4=.

7.fe5 A) 7...Ne5 8.Ne5 (8.Nc3 Nd5 9.Nd5 Nf3 10.Qf3 Bb2 11.Rb1=; 8.Bb5 c6 9.Ne5 de5 10.Bc4 Nd5 11.0-0=) 8...de5 9.Bc4 Qd6 10.Qf3 f5 11.Nc3=; B) 7...de5 8.Bd3 (8.Bb5 c6 9.Bc4 b5 10.Ba2 0-0 11.0-0=; 8.Bc4 0-0 9.0-0 Nf5 10.e4 Nd6 11.Qe2=) 8...f6 9.0-0 Nb6 10.Nc3 Be6 11.Ne4+=; C) 7...Nf5 8.Bc4 (8.Bb5 c6 9.Be2 Ne5 10.Ne5 de5 11.0-0=; 8.Be2 Ne5 9.Ne5 de5 10.0-0 Be6 11.Bf3=) 8...Ne5 9.Ne5 de5 10.0-0 Nd6 11.Bd5=.

7.Be2 ef4 8.ef4 0-0 9.0-0 Nb6 10.c4 Re8 11.Bd3 (11.Nc3 Nh5 12.g3 d5 13.cd5 Nd5=+) 11...Nh5 12.Bg7 Ng7 (12...Kg7 13.g3=+) 13.Nc3= Bf5 (13...Be6 14.Qb3=) 14.Be2 (14.Bf5 Nf5 15.Qb3 Qd7=) 14...Ne6=+ 15.g3 Qf6 (15...a5 16.d4=) 16.d4 Bg4 (16...a5 17.Qd2=) 17.c5 dc5 (17...Nd7 18.cd6 cd6 19.Rc1=) 18.bc5 Nc5 (18...Nd7 19.Ne5 Be2 20.Ne2=) 19.dc5+= Qc3 20.cb6 Rad8 (20...ab6 21.Qd3 Qc5 22.Kg2+/–) 21.Qc1+/– Qc1 22.Rac1 Re2 23.bc7 Rc8 24.Ne5 Be6 25.Rfd1 Kf8 26.Rd4 Ke7= 27.a4 f6 28.Nf3 Bg4 29.Nd2 Bd7 30.Kf1 Re6 31.f5 Re5 32.g4 gf5=+ 33.gf5 Bc6–/+ 34.Rh4 Rf5–+ 35.Ke2 h5 36.Nb3 Rc7 37.Nd4 Re5 38.Kf2 Rc8 39.Rf4 Bd7 40.Rb1 b6 41.Rg1 Kf7 42.h4 Rc4 43.Kg3 Ra4 44.Rgf1 Re3 45.Kh2 Ke8 46.Nf5 Rf4 47.Rf4 Bf5 48.Rf5 Re5 49.Rf6 Rb5 (50.Kg3 a5–+) 0–1. Skulsky,I – Berry,J, Vancouver, 1986.

7.fe5 de5 8.Nc3 0-0 9.Be2 e4 10.Nd4 c5 11.bc5=.

7.fe5 de5 8.Be2 e4 9.Nd4 c5 10.bc5 Nc5 11.0-0=.

7.fe5 de5 8.Be2 Qe7=.

7.fe5 Ng4 8.Be2 (8.Bb5 c6 9.Be2 Nde5 10.Ne5 Ne5 11.0-0=) 8...Nde5 9.Ne5 Ne5 10.0-0 Qg5 11.Nc3 +=.

4.Bb2 (--> 3.Bb2 Bg7 4.c4).

4.Nc3 Nc6 5.e4 d6 6.Nf3 f5 7.d3 Nf6 8.Be2 0-0=.

4.Nc3 d6 5.e4 f5 6.d3 Nf6 7.Nf3 a5 8.b5 Nbd7=.

4.Nc3 Ne7 5.e3 0-0 (5...d5 6.cd5 Nd5 7.Nd5 Qd5 8.d3=) 6.Nf3 c6 (6...d5 7.Bb2=+) 7.Be2 (7.d4 ed4 8.Nd4 Nf5=) 7...d5 8.d4 e4 (8...ed4 9.ed4 dc4 10.Bc4=+) 9.Nd2= f5 (9...a5 10.cd5 cd5 11.b5=) 10.f4 (10.cd5 cd5 11.Nb3 Nbc6=) 10...Be6 11.0-0 Nd7 12.cd5 Nd5 (12...cd5 13.Bb2=) 13.Nd5 Bd5 14.g3 (14.Nc4 c5=) 14...Kh8 (14...a5 15.ba5 Ra5 16.Nc4=+) 15.h4 (15.Nc4!?=) 15...c5 (15...a5 16.Bb2–/+) 16.bc5 Nc5 17.Rb1 Nd3 18.Bd3 ed3 19.Nf3 Rc8 20.Ne5 Rc2 21.Rb2 Be5 22.de5 Be4 23.Rf2 Qc7 24.Rbc2 dc2 25.Qd6 Qd6 26.ed6 Rd8 27.Rd2 Kg7 28.Kf2 Kf7 29.Ke1 Ke6 30.d7 Rd7 31.Rd7 Kd7 32.Kd2 Kc6 33.Kc3 Kd5 34.Bb2 Kc5 35.Bc1 Kb5 36.Kb3 Kc5?? 37.Kc3 b5 38.Bb2 a5 39.Bc1 Kc6 40.Bb2 Kd5 41.Bc1 Kc5 42.Bb2 b4 43.ab4 ab4 44.Kb3 Kb5 45.Bc1 Bf3 46.Kc2 Kc4 47.Bb2 Be4 48.Kd2 Kb3 49.Kc1 ½–½. Bulcourf,Carlos (2210) – Tempone,Marcelo (2455), Buenos Aires ITT, 1992.

4.Nc3 Ne7 5.e4 0-0= 6.Nf3 a5 7.b5 f5 8.d3 d6=.

4.Nc3 Ne7 5.e4 d6=.

4.Nc3 Ne7 5.h4 d6 (5...d5 6.cd5 Nd5 7.Bb2 Bg4 8.Nd5 Qd5=+) 6.e3 (6.e4 Nbc6 7.h5 Nd4 8.Nge2 Bg4=) 6...Nd7 (6...Be6 7.h5 Nd7 8.e4 h6=) 7.Nf3 (7.h5 a5 8.hg6 hg6=) 7...Nf6 (7...a5 8.Bb2 Nb6=) 8.d4 ed4 (8...0-0=) 9.Nd4 d5 (9...0-0 10.Bd3=) 10.Bb2 0-0 (10...Bg4 11.f3 Bd7 12.cd5 Ned5 13.Nd5 Nd5 14.Nc6 Bc6 15.Bg7+=) 11.cd5 Ned5 12.Be2 (12.Nd5 Nd5 13.h5 g5=) 12...Nc3= 13.Bc3 Ne4 14.Rc1 Nc3 15.Rc3 Re8 16.h5 Bf5 17.hg6 hg6 (< 17...fg6 18.Qb3 Kh8 19.Nf5 gf5 20.Qc2+/–; 17...Bg6?! 18.Qd2=) 18.0-0 (18.Rc4 Be4 19.Bf3 c6 20.Be4 Re4=) 18...Bd4 19.ed4 Qd6 (19...Re4 20.d5=) 20.Bf3 Be4 21.Be4 Re4 22.Qc2 Re7 23.Rd3 (23.Re3 Rae8 24.Re7 Re7=) 23...Rae8 24.Qc5 Qa6 25.Qc3 Kg7 26.Rc1 Qd6 27.d5 f6 28.g3 Rh8 29.Qc5 Qd7 30.Re3 (30.Qa7?? Qh3 31.f3 Qh1 32.Kf2 Rh2) 30...Re3 31.Qe3 b6? (better is 31...Rh5=) 32.Qf4+- Rc8 33.Rc6 Qd8 (33...Qe7 34.Qc1 Rd8 35.Rc7+-) 34.b5 (34.Qc4 g5+-) 34...g5 (34...a6 35.ba6 b5 36.Qc1 Qd5 37.Rc7 Rc7 38.Qc7 Kh6 39.Qb7+-) 35.Qf5 (35.Qc4 Qd7+-) 35...Rb8 36.Qe6 Rb7 37.a4 (37.f4 gf4 38.Qg4 Kf7 39.Qf4 Qe7+-) 37...Qf8 (better is 37...Rb8+-) 38.Qd7 Kh8 (38...Kg6+-) 39.d6 1–0. Bulcourf,Carlos – Redondo,Mariano, San Fernando, 1993.

4.Nc3 f5 5.e3 Ne7 6.d4 d6 7.Nf3 0-0 8.Bb2 ed4=.

4.Nc3 f5 5.h4 d6 (5...Nf6 6.Nf3=+) 6.e3 (6.h5 Nc6=) 6...Nc6 (6...Nf6 7.Be2=+) 7.Bb2 Nf6 8.Nf3 (8.Be2 0-0=) 8...0-0 9.b5 Ne7 10.d4 ed4 (10...e4 11.Nd2=+) 11.Nd4= c5 12.Nf3 (12.bc6 bc6 13.Rb1 Rb8=) 12...h6 (12...Ne4 13.Rc1=+) 13.Be2 (13.Qc2 Be6=) 13...Be6 (13...Ne4 14.Rc1=) 14.0-0 Nc8 15.Qc2 Nb6 16.Na4 (16.Nd2 Qe7=) 16...Na4 17.Qa4 Ne4 (17...a6 18.Bc3=) 18.Bg7 Kg7 19.Qc2 Qe7 20.g3 Rad8 21.Rad1 b6 22.Nd2 Nf6 23.Bf3 Qf7 24.Rc1 g5 25.hg5+= hg5 26.Rfe1 Rh8 27.Qc3 Kg6 28.Kf1 Nd7 29.Ke2+= Ne5 30.Bg2 g4 31.Rh1 Rh1 32.Bh1 Rh8 33.Bg2 Rh2 34.Bc6 Nc6–/+ 35.bc6 Qc7 36.e4 Qc6 37.Qe3 Rh5 38.e5 d5 39.cd5 Bd5 40.e6? Qe6–+ 41.Qe6 Be6 (42.Ke3 Rh3–+) 0–1. Bulcourf,Carlos – Panno,Oscar, Pro American op 9th, 2002.

4.e4 c6 5.d3 d5 6.Nd2 Ne7 7.Ngf3 0-0 8.Be2 f5 9.Bb2 Qc7 10.Qb3 de4 11.c5 Kh8 12.de4 a5 13.0-0 Bd7 14.Bc4 h6 15.ef5 Nf5 16.Rae1 Nd4 (better 16...Be8+-) 17.Nd4 ed4 18.Re7 Qf4 19.Nf3 a4? (19...Re8 20.Rf7 Qe4+-) 20.Qd1 Bg4 (20...Bf6 21.Nd4 h5 22.Qc2+-) 21.Nh4 Qg5 (21...Bh5 22.Qh5!! gh5 23.Ng6 Kh7 24.Nf4 Rf4+-) 22.Bd4 Rf6 (22...Qe7 23.Ng6 Kh7 24.Qg4 Rf4 25.Bg8 Kg8 26.Ne7 Kf7 27.Qg7 Ke8 28.Re1 Rf7 29.Qg8 Rf8 30.Nd5 Kd8 31.Qf8 Kd7 32.Re7) 23.Bf6 Bf6 (23...h5 24.Qd8 Kh7 25.Bg7 Qe7 26.Qg8) 24.Qd8 1-0. Abigail64 (2570) - caoma (2140), Rated Blitz game, lichess.org, 2016. (=1.a3 A00: Irregular Openings 1...e5 2.b4 g6 3.c4)

4.e4 d6 5.Nf3 f5 6.d3 Ne7 7.Be2 0-0 8.0-0 a5=.

4.e4 Ne7=.

4.e4 Nf6 5.Nc3 d6=.

4.e4 Nf6 5.d3 a5 6.b5 c6 7.Nf3 cb5 8.cb5 d5 9.Nbd2 0-0 (9...Qb6 10.Rb1=) 10.a4 (10.Bb2 Nbd7=) 10...Re8 11.Be2 Nbd7 (11...b6 12.0-0+=) 12.Ba3 (12.0-0 b6=) 12...b6+= 13.Rc1 Bb7 14.0-0 (14.ed5 Bd5 15.0-0 Rc8=) 14...Rc8 (14...de4 15.de4 Ne4 16.Ne4 Be4 17.Bc4=) 15.Rc8 Qc8 16.Qb1 Qc3 17.Qa2 Bf8 (worse is 17...de4 18.Rc1 Bd5 19.Rc3 Ba2 20.de4+=) 18.Bb2 Qb4 19.Bd1 (19.Rd1 Bd6 (worse is 19...de4 20.de4 Bc5 21.Bc4+=) 20.Rb1 de4 21.Ne5 Be5 22.Be5 Bd5=) 19...de4+= 20.de4 Ne4 21.Bb3 Nd6 (worse is 21...Nd2 22.Bf7 Kh8 23.Be8+/–) 22.Ba3 Qf4 23.Bd6 Bd6 24.Bd5 Nc5 25.Bb7 Nb7 26.Qd5 Re7 27.g3 (better is 27.Ne4!? Bc5 28.Qc6+=) 27...Qa4–+ 28.Ne4 Bc5 (28...Qb4 29.Rd1 Bb8 30.Nf6 Kg7 31.Nd7–/+) 29.Qc6–/+ Qa3 30.Rd1 (30.Kg2 Nd6 31.Nd6 Bd6 32.Qb6 Kg7–/+) 30...Qb3 (30...Re6 31.Qb7 Qf3 32.Rd8 Bf8 33.Qa8+=) 31.Rd5 a4 32.Nfd2 Qb4 (32...Qd1 33.Kg2 Qe1=) 33.Rc5? (better is 33.Rd7 Rd7 34.Qd7–/+) 33...Nc5–+ 34.Nf6 ½–½. Cirulis,Ilmars (1840) – Duttagupta,Aniruddha (2000), FICGS, 2015.

4.Bb2 d5 5.e3 Ne7 (5...Be6 6.Be2 (6.Nf3 Nd7 7.Be2 Qf6 8.c4 dc4 9.dc4 0-0-0=; 6.Nd2 d4 7.Ngf3 Nh6 8.Nc4 de3 9.Ne3 Nc6=; 6.d4 e4 7.c4 Nf6 8.cd5 Nd5 9.Ne2 Qh4=; 6.Ne2 Ne7 7.d4 Nd7 8.de5 Ne5 9.Nd4 Bg4=; 6.f4 Qh4 7.g3 Qh6 8.Nd2 Nd7 9.Ne2 Ne7+=) 6...Qg5 7.f4 Qh4 8.g3 Qh6 9.Be5 Be5=; 5...Nd7 6.Nf3 Ne7 7.Be2 c5 8.bc5 Nc6 9.d4 e4=; 5...d4 6.Nf3 a5 7.b5 Ne7 8.Be2 c6 9.c4 de3=) 6.Nf3 (6.Be2 0-0 7.Nf3 e4 8.Nd4 b6 9.Nc3 ed3=) 6...Nd7 7.c4 (7.Be2 a5 8.0-0 0-0 9.b5 e4=) 7...c6 (7...0-0 8.Nbd2 Re8 9.Be2 e4=) 8.cd5 (8.Be2 a5 9.0-0 0-0=) 8...cd5 (8...Nd5 9.e4 Nf4=) 9.Qb3 (9.Be2 0-0=) 9...0-0 (9...a5=) 10.Nc3 Nb6 11.Rc1 d4 12.Nb5 (12.Ne4!?+=) 12...Be6 13.Qd1 Nc6 14.Be2 (14.ed4!? ed4 15.Be2–/+) 14...a6–+ 15.Rc6 (better is 15.ed4 ab5 16.de5–+) 15...bc6 (15...ab5?! 16.Rc1–/+) 16.Nbd4 ed4 17.Nd4 Bd5 18.Qc2 (18.0-0 a5 19.e4 ab4 20.ab4 Bd4 21.Bd4 Bb3 22.Qb3 Qd4–+) 18...Qf6 (better is 18...Bg2 19.Rg1 Bd5–+) 19.Nc6?? (better is 19.e4 Ba2 20.0-0–+) 19...Qb2 (19...Qb2 20.Qb2 Bb2 21.Ne7 Kg7 22.Nd5 Nd5–+) 0–1. Patrinos,Ilias – Mitsakos,Achilles, Epikinonias op 4th, 2000. (=1.a3 e5 2.b4 g6)

4.Bb2 d5 5.Nf3 A) 5...Nc6 6.e3 Bg4 7.Be2 Qd6 8.Nbd2 0-0-0 9.c4 f5=; B) 5...Nd7 6.e3 (6.e4 d4 7.c3 dc3 8.Nc3 Ne7 9.d4 ed4=; 6.c4 d4 7.e3 de3 8.fe3 Ne7 9.Nc3 0-0=) 6...Ne7 7.Be2 0-0 8.0-0 e4 9.Nd4 c5=; C) 5...f6 6.e3 (6.Nbd2 Ne7 7.e3 0-0 8.Be2 a5 9.0-0 Qd6=) 6...a5 7.Be2 ab4 8.ab4 Ra1 9.Ba1 Qd6=.

4.Bb2 (--> 3.Bb2 Bg7 4.e3).

4.c4 Ne7 (4...d5 5.cd5 Qd5 6.Bb2=) 5.Nc3 (5.Bb2 0-0=) 5...0-0 (5...d5 6.cd5 Nd5 7.Bb2=) 6.Bb2 d6 7.Be2 (7.Nf3 a5=) 7...f5 (7...a5 8.Nf3=+) 8.Nf3 (8.d4 a5=) 8...h6 (8...e4 9.Nd4=) 9.0-0 (9.d4 c5+=) 9...g5 (9...e4 10.Nd4=) 10.d3 (10.d4 g4 11.Ne1 a5+=) 10...Ng6 (10...Be6 11.d4+=) 11.Nd2 (11.d4 g4 12.Ne1 ed4 13.ed4 Nf4+=) 11...Be6 12.Bh5 Bf7 (12...Ne7 13.Qf3 d5 14.Rad1=) 13.Qf3 Qc8 14.g3 (14.Nd5 Qd7 15.Rfb1 c6=) 14...g4= 15.Qe2 Nh8 (15...Nd7 16.f4=) 16.Bf7+= Nf7 17.f4 ef4 18.ef4 (18.Rf4 Ng5 19.Kg2 Qe6+=) 18...Re8= 19.Qf2 c5 (19...a5 20.b5=) 20.Nb3+= b6 21.Rfe1 Nc6 22.Nd5+/– Re1 23.Re1+- Qf8 24.b5 Na5 25.Na5 ba5 26.Ne7 Kh7 27.Nf5 Bb2 28.Qb2 Kg6 29.Re6 Kh7 30.Qf6 Qg8 31.Nh6 (31...Qg7 32.Qf5 Kh8 33.Nf7 Kg8 34.Rg6+-; 31.Qh6! Nh6 32.Rh6#) 1–0. Bulcourf,Carlos Enrique (2280) – Mackenzie,Gerardo (1875), CAA op Invierno, 1993.

4.Nc3 A) 4...f5 5.d4 Bg7 6.Nf3 ed4 7.Nd4 Ne7 8.Be3 fe4= 9.Ne4=; B) 4...Nf6 5.Nf3 Bg7 6.Bc4 Ne4 7.Ne4 d5 8.d4 dc4= 9.Ne5=; C) 4...Be6 5.Nf3 Bg7 6.Bb5 c6 7.Be2 f5 8.d4 ed4= 9.Bg5=; D) 4...Nd7 5.Nf3 f5 6.d4 Bg7 7.ef5 gf5 8.Bc4 ed4 9.Bg5+=; E) 4...a5 5.b5 f5 6.d4 Bg7 7.Nf3 ed4 8.Bg5 Nf6= 9.Qd4=.

4.Bc4 Nf6 5.Nc3 Bg7 6.Nf3 Ne4 7.Ne4 d5 8.d4 dc4 9.Ne5=.

4.Nf3 A) 4...Nd7 5.Nc3 Ngf6 A1) 6.Bc4 Nb6 7.Ba2 Bg7 8.d3 0-0= 9.Be3=; A2) 6.Be2 Bg7 7.d3 a5 8.b5 d5 9.ed5+=; B) 4...Nf6 5.Nc3 Bg7 6.Bc4 B1) 6...0-0 7.0-0 c6 8.d4 b5= 9.de5=; B2) 6...Ne4 7.Ne4 d5 8.d4 dc4 9.Ne5=; C) 4...Be6 5.d4 ed4 6.Nd4 Bg7 7.Bb2 Nf6 8.Bd3 0-0+= 9.0-0+=; D) 4...a5 5.b5 f5 6.d3 Nf6 7.Nc3 Bg7 8.Be2 0-0= 9.0-0=; E) 4...Bg7 5.Bc4 Nf6 6.Nc3 0-0 7.0-0 c6 8.d4 ed4 9.Nd4=.

4.Nc3 A) 4...d5 5.ed5 Nd5 A1) 6.Nd5 Qd5 7.Ne2 Bg7 8.Nc3 Qe6= 9.Be2=; A2) 6.Qf3 Nc3 7.Bc4 Bf5 8.Qc3 Bg7 9.Ne2=; B) 4...Bg7 B1) 5.Nf3 d5 6.ed5 e4 7.Qe2 0-0 8.Ng1 Nd5=+ 9.Bb2=+; B2) 5.Bc4 Ne4 6.Ne4 d5 7.Bd5 Qd5 8.d3 f5 9.Bh6=+.

4.Nf3 Bg7 A) 5.d4 ed4 A1) 6.Qd4 Nc6 7.Qd3 Qe7 8.Bb2 d5 9.e5–/+; A2) 6.e5 Qe7 7.c3 d6 8.cd4 de5 9.de5=+; B) 5.c4 Ne4 6.Qe2 d5 7.Bb2 f6 8.c5 0-0 9.h4–/+; C) 5.Bb2 Ne4 6.Qe2 d5 7.d3 Ng5 8.Ne5 0-0 9.h4=+.

4.Bb2 Ne7 5.d4 ed4 6.Bd4 Bd4 7.Qd4 0-0 8.Nf3 d6 9.Bc4 Nec6 10.Qc3 Be6 11.0-0 d5 12.ed5 Bd5 13.Rd1 Ne7 14.Bd5 Nd5 15.Qd4 c6 16.Nc3 Qf6 17.Nd5 Qd4 18.Rd4 cd5 19.Rd5 Nc6 20.Rd7 b6 21.b5 Rfd8 22.bc6 Rd7 23.cd7 Rd8 24.Rd1 Kf8 25.Ne5 Ke7 26.f4 Rf8 27.c4 f5 28.a4 Kd8 29.Rd5 Rf6 30.a5 Rf8 31.ab6 ab6 32.Rb5 Kc7 33.h4 Rg8 34.Rd5 Rd8 35.Kf2 Ra8 36.Nf7 1–0. pillsbury (2145) – cervejarj (2120), net–chess.com, 2014.

4.Bc4 a6 5.Nf3+= b6 6.Nc3 b5 7.Bb2?? bc4–+ 8.Nd5 c6 9.Ne3 Ne7 10.Nc4 Bb7?? 11.Nce5?? d6?? 12.Nd3?? Nc8?? 13.e5?? Qe7 14.0-0=+ de5 15.Re1 e4?? 16.Bg7+- Rg8 17.Nc5 Rg7 18.Ne4 Kf8 19.Nc5 Qc7 20.Qe2?? Ne7+/– 21.Ne5 Qd6?? 22.Nb7+- Qd5 23.Nc5 Qd4 24.c3 Qd5 25.Ned7! Nd7 26.Qe7 Kg8 27.Nd7 h5 28.Nf6 Kh8 29.Qe8! Re8 30.Nd5 Rd8 31.Nf6 Rd2 32.Re8 Rg8 33.Rg8 1–0. dugmak – toon magpie, ChessWorld.net, 2005.

4.Bc4 Nf6 5.Nc3=.

4.Bb2 d6 5.g3 Ne7 6.Bg2 0-0 7.0-0 c6 8.d4 Qc7 9.de5 de5 10.Nbd2 Be6 11.Ng5 Bg4 12.h3 Bf5 13.e4 Bd7 14.Qe2 h6 15.Ngf3 Be6 16.Nc4 Nd7 17.Rfd1 Rad8 18.Rab1 b5 19.Ncd2 a6 20.Nb3 Nc8 21.Qe3 Ncb6 22.Nc5 Nc5=+ 23.Qc5 Nc4 24.Bc3 Rfe8 25.Be5 Ne5 26.Ne5 Be5 27.f4 Bg7 28.e5 Bd7 29.Rd2 Bf8 30.Qc3 Qb6 31.Kh2 c5 32.bc5 Bc5 (32...Qc5?! 33.Qc5 Bc5 34.Rbd1–/+) 0–1. Skean Du – jammboy, ChessWorld.net, 2006.

4.e4 d5 5.d3 Bg4 6.Be2 c6 7.0-0+= Bf3 8.Bf3 Ne7 9.c4 d4 10.Nd2 0-0 11.Nb3 Nd7 12.Bd2 Kh8 13.Rc1 Qc7 14.c5 f5 15.b5 cb5= 16.ef5 gf5 17.c6 Nc6–/+ 18.Na5 Rf6 19.a4 ba4 20.Qa4 Rc8 21.Nc6 bc6 22.Ba5 Nb6 23.Qb3 Bh6 24.Rc5 Bf8 25.Rc2 c5 26.Rfc1 Qf7 27.Qb5 Nd5 28.Bd2 Rb6 29.Qc4=+ Rd8 30.Re1 e4 31.de4 fe4 32.Be4 Re6 33.Rcc1 Nb6–/+ 34.Qb5 Rf6 35.Bg5+= Rf2?? 36.Bd8+- c4 37.Bb6 ab6 38.Qc4 (38...Qc4 39.Rc4+- (39.Kf2 Qf7 40.Bf3 d3–/+); 38.Qb6 Rd2 39.Rf1 Qe7 40.Rc4 Qe8 41.Qf6 Bg7+-) 1–0. Bulcourf,Carlos (2205) – Seminara,Juan Pablo, Acasusso op, 1991.