CLICK!

GET MY 1.b4 COLLECTION
1.b4 collection contains much more games and lines than can be presented here.
Click here for more info!

Flag Counter

TESTA300 Release 2016-11-08
Send your 1.b4 games to me, please. Thank you! /Marek
Marek Trokenheim's homepage
(c) Marek Trokenheim

1.b4 a5

(...)

2.a3 a4 3.h4 e6 4.Rh3 d5 5.g3 Be7 6.e3 Nf6 7.Bb5 c6 8.Bd3 e5 9.h5 Bh3 10.Nh3 e4 11.Be2 0–0 12.h6 gh6 13.g4 Kh8 14.g5 hg5 15.Ng5 h6 16.Nh3 Rg8 17.Nc3 Qd7 18.f3 Qh3 19.Bb2 Qh4 20.Kf1 Qh3 21.Ke1 Rg1 22.Kf2 Qg2 0–1. albert777 – olek1935, kurnik, 2012.

2.a3 e6 3.ba5 Ra5 4.Bb2 f6 5.e3 e5 6.Be2 Ne7 7.c4 Ng6 8.Nc3 d6 9.Nd5 Be6 10.f4 Bd5 11.cd5 Rd5 12.fe5 Ne5 13.Nf3 Ng6 14.0–0 Be7 15.Nd4 c5 16.Bc4 Rh5 17.Ne6 Qb6 18.Ng7 Kd7 19.Nh5 Qb2 20.Rb1 Qe5 21.Qa4 Kc7 22.Ng7 d5 23.Bb5 f5 24.Be8 Qg7 25.Qa5 Kd6 26.Rb6 Ke5 27.d4 cd4 28.ed4 Ke4 29.Re1 Kf4 30.Rf1 Kg4 31.Bg6 Qd4 32.Kh1 hg6 33.h3 Kh5 34.Qb4 Bb4 35.Rb4 Qd3 36.Rff4 Qa3 37.g4 fg4 38.Rg4 Nc6 39.Rh4 Kg5 40.Rbg4 Kf5 41.Rf4 Ke5 42.Ra4 Qf3 43.Kh2 Qf2 44.Kh1 Rh4 45.Rh4 Qh4 0–1. Nautiluschess – patc, ICS blitz, 2001.

2.Ba3 a4 3.e4= e5 4.d4 Nc6 5.d5 Nd4?? 6.c3+– Nb3 7.ab3 d6 8.c4 Nf6 9.Bb2 ab3 10.Ra8 Bg4 11.Rd8 Kd8 12.Be2 h5 13.Bg4 hg4 14.Qb3 Ne4 15.Nd2 Ng5 16.Qe3 Be7 17.f3 gf3 18.Ngf3 Ne4 19.Ne4 Kd7 20.c5 Bh4 21.Nh4 Rh4 22.0–0 Re4 23.Qe4 f6 24.cd6 Kd6 25.Qg6 Kd5 26.Qg7 (26…b5 27.Qd7 Kc4 28.Qc6 Kb4 29.Qc3 Ka4 30.Ra1#) 1–0. xyzzy – sirrad, ChessWorld.net, 2005.

2.Ba3 e5 (--> 1.b4 e5 2.Ba3 a5).

2.Ba3 e6 3.c3 (3.b5 Ba3 4.Na3 e5=) 3...b6 (3...ab4 4.Bb4 (4.cb4? Qf6 5.Nc3 Ra3–+) 4...c5 5.Ba3+=) 4.e4 (4.b5!?=) 4...Bb7–/+ 5.Nf3 (5.Qc2 ab4 6.Bb4 Bb4 7.cb4 Nc6+=) 5...Be4 (better is 5...ab4 6.Bb2 Nf6–/+) 6.Bb5 (6.b5!?–/+) 6...Nf6 (6...Qf6 7.Qe2 Bf3 8.Qf3 Qf3 9.gf3 ab4 10.Bb4 Bb4 11.cb4–+) 7.d3 (7.0–0 Bb1 8.Qb1 ab4–+) 7...Bb7 (7...Bf3 8.Qf3 c6 9.d4–+) 8.0–0 Be7 (8...ab4 9.Bb4 Bb4 10.cb4–+) 9.d4 (9.Re1 0–0–+) 9…0–0 (9...0–0 10.Be2 Nd5–+) 0–1. Ritter – Wartig,Wolfgang, corr SOK–90–61, 1990.

2.a4 ab4 3.Bb2 Nf6 4.Bf6 (4.Nf3 d6–/+) 4...gf6 (4...ef6 5.e4–/+) 5.e4 Nc6 6.Bb5 Rg8 7.g3 Nd4 8.Bc4 (8.Bd3 Bg7–/+) 8...d5 (better is 8...b5 9.Bb3 Bb7–+) 9.c3?? (better is 9.Bd5 e6 10.Ba2–/+) 9...dc4–+ 10.cd4 (10.cb4 e5 11.Na3–+) 10...Qd4 11.Ra2 (11.d3 Qa1 12.dc4–+) 11...Qe4 12.Kf1 Qh1 13.h4 Bh3 14.Ke2 (14.Ke1 Rg3! 15.Ra3 Qg1 16.Ke2 Bg4 17.Rf3 Bf3 18.Ke3 e5 19.Qg1 Bh6) 14…Qe4# 0–1. Castletyme – Pcmvr (2080), internet, 2008.

2.ba5 b6 3.ab6 cb6 4.Nf3 Bb7 5.g3 Nf6 6.Bg2 e6 7.0–0 d5 8.d3 Bd6 9.Nbd2 0–0 10.Bb2 Ba3 11.Qc1 Bb2 12.Qb2 Nc6 13.c4 dc4 14.Nc4 Nd4 15.Nd4 Bg2 16.Kg2 Qd4 17.Qd4 Ne4 18.Qe4 Ra2 19.Ra2 Ra8 20.Ra8 1–0. giorgo – abecius, playok.com, 2012.

2.ba5 e6 3.a6 (--> 1.b4 e6 2.b5 a6 3.ba6).

2.ba5 h5 3.a6 Na6 4.e3 Nf6 5.Qe2 h4 6.g3 (better is 6.Bb2!?+=) 6...hg3–/+ 7.fg3 ½–½. Petenev,Konstantin (2255) – Dzhumagaliev,Yan (2300), Novosibirsk Region–ch final, 2008.

2.Bb2 b6 3.a3 Bb7 4.f3 Nf6 5.e4 d6 6.Qe2 e5 7.Qf2 c5 8.Bb5 Bc6 9.Bc4 b5 10.Bb3 c4 11.Ba2 Be7 12.Nh3 0–0 13.Ng5 h6 14.Nh3 a4 15.0–0 d5 16.d3 de4 17.fe4 cd3 18.cd3 Bd6 19.Nd2 Bd7 20.Nf3 Bh3 21.gh3 Re8 22.Nh4 Nc6 23.Qg2 Bf8 24.Nf5 Kh7 25.Bf7 Qd3 26.Qg6 Kh8 27.Be8 Rc8 28.Bc6 Rc6 29.Be5 Ne4 30.Rad1 Rg6 31.Kh1 Qh3 32.Rd8 Qg2# 0–1. ronnieg – vigocontrito, fics, Oklahoma City, 2001.

2.Bb2 d5 3.b5 (--> 1.b4 a5 2.b5 d5 3.Bb2).

2.b5 Nc6 3.bc6 1–0. Rosenhahn – Cassola, corr 3GMM–51 1994–95.

2.c3 a4 3.Nf3 b5 4.a3 (4.e4 c6+/–) 4...Nf6 5.e4 Ne4 (5...c6 6.e5 Nd5 7.d4+=) 6.Bb5+/– c5 (6...Bb7 7.Ba4 e6 8.0–0+/–) 7.0–0 Qb6 8.Ba4 cb4 9.ab4 Ba6 10.d3 Nf6 11.Na3 Bb7 (11...Nd5 12.Qb3 Bb7 13.Nc4+–) 12.Be3 Qc7 13.Nb5 Qc8 14.Ne5 e6 (14...Nc6 15.Bf4 Ba6 16.Qf3 Bb5 17.Bb5 Ra1 18.Ra1+–) 15.Nc4 Nd5 (15...Ra6+–) 16.Nbd6 (16.Nbd6 Bd6 17.Nd6 Ke7 18.Nc8 Rc8 19.c4+–) 1–0. pierred (2760) – dennism (2255), net–chess.com, 2010.

2.c3 e6 (--> 1.b4 e6 2.c3 a5).

2.c3 g6 3.Qa4 Bg7 4.Bb2 Nf6 5.d3 0–0 6.Nd2 d5 7.h3 Nbd7 8.ba5 c5 9.Ngf3 Ra5 10.Qc2 e5 11.e3 Qe7 Black prepares e4 12.Be2 b5 13.0–0 e4 14.de4 de4 15.Ng5 Bb7 16.c4 h6 17.Nge4 Ne4 (better is 17...Be4 18.Ne4 Qe4–/+) 18.Bg7+= Kg7 19.cb5 (better is 19.Ne4 Qe4 20.Qc3 Ne5 21.Bf3+=) 19...Nb6?? (19...Rfa8 20.Rfd1 Nd2 21.Qd2–/+) 20.Nb3?? (better is 20.Ne4 Qe4 21.Qc3 f6 22.Bf3+/–) 20...Raa8 21.Rfc1 Rac8 22.Bf3 Rfe8 23.Na5 Bd5–/+ Black prepares c4 24.Nb3 c4 25.Nd4 Ng5 26.Bd5= Nd5 27.Nc6 Qc5 28.Qc4 Qc4 29.Rc4 Re4 30.Rac1 Nb6 31.Re4 Ne4+= 32.f3 Nd6 33.Kf2 Nb5 34.Ke2?? Na7!!–+ 35.Kd2 Rc6 36.Rb1 Nc4 37.Kd3 Nc8 38.a4 N8d6 39.e4 Na5 40.g4 Kf6 41.f4 Ke7 42.Rb4 f6 43.e5 fe5 44.fe5 Ndb7 45.h4 Ke6 46.Kd4 Ra6 47.Ke4 Nc5 48.Kf4 Nd3 (48...Nd3 49.Ke4 Nb4–+) 0–1. grahamtrue (2245) – mrdoop (2430), net–chess.com, 2011.

2.e4 a4 3.c4 e5 4.a3 c6 5.Nc3 Qb6 6.Nf3 f6 7.Nh4 g6 8.Be2 Qd4 9.Bb2 Bh6 10.d3 Ne7 11.Qc2 Qd6 12.c5 Qe6 13.0–0 0–0 14.Na4 d5 15.ed5 Nd5 16.d4 e4 17.Nb6 Nb6 18.cb6 Nd7 19.Bc4 Nb6 20.Be6 Be6 21.Qe4 Bd5 22.Qc2 Nc4 23.Bc1 Bc1 24.Rfc1 Rae8 25.Nf3 Nd6 26.Re1 Be4 27.Qc5 Nf5 28.Nd2 Bd5 29.f3 Rb8 30.Ne4 b6 31.Qc3 Rfd8 32.Ng3 Ng3 33.hg3 Kf7 34.Re3 Rd7 35.Rae1 h5 36.Qc2 Rc8 37.Qe2 Rcc7 38.Re8 c5 39.dc5 bc5 40.bc5 Rc5 41.Rh8 Kg7 42.Qe8 Rdc7 43.Qf8# 1–0. aterf64 – zsuzsaegy, kurnik, 2012. (=1.e4 a5 2.b4)

2.e4 d6 3.ba5 Ra5 4.d4= Nf6 5.Nc3 g6 6.Bc4 Bg7 7.Nf3 (7.Qd3 c6=+). perspective08 – StephenHilton (1625), internet, 2006.

2.Nf3 a4 3.a3 b5 4.Bb2 c6 5.d4 d6 6.e3 e6 7.c4 Bd7 8.cb5 cb5 9.Nc3 Qb6 10.Bd3 d5 11.Ne5 Bc8 12.Bb5 Bd7 13.Bd7 Nd7 14.Nd7 Kd7 15.Na4 Qb5 16.Nc5 Ke8 17.Nd3 Nf6 18.0–0 Ne4 19.Ne5 Bd6 20.Qd3 Qb7 21.Qb1?? f6? 22.Nf3+– Kf7 23.Rd1 Rhc8 24.g3 Rc4 25.Nd2 Nd2 26.Rd2 Rac8? 27.Qe1 Qc7 28.f4 f5 29.Rdd1 Qb7 30.Rac1 Qb5 31.Rc4 dc4 32.Qc3 Rc6?? 33.d5 Rc7 34.Qg7 Ke8 35.Qg8 Bf8 36.Qe6 Be7 37.d6 Rc6 38.d7 Kd8 39.Qg8 Kc7 40.d8Q Bd8 41.Qd8 Kb7 42.Rd5 Qa4 43.Rd7 Ka6 44.Qa8 Kb5 45.Rb7 Rb6+– 46.Rb6 Kb6 47.Qa4 c3 48.Bc3 Kc7 49.Qa6 Kd8 50.Qa7 Ke8 51.Qh7 Kf8 52.Be5 Ke8 53.Bf6 Kf8 54.b5 Ke8 55.Qe7# 1–0. tron7 – olek1935, kurnik, 2012. (=1.Nf3 a5 2.b4)

2.Nf3 ab4=+ 3.a3 e6 (3...Nf6 4.Bb2=+) 4.c3 (4.e4 Nf6 5.e5 Ne4=+) 4...bc3–/+ 5.Nc3 Nf6 6.Bb2 Be7 7.d4 (7.e3 0–0–/+) 7...d6 8.e3 0–0 9.Bd3 Nbd7 10.Qc2 Ra5 11.Ne4 Ne4–/+ 12.Be4 Nf6 13.Bd3 Bd7 14.Bc3 Ra8 15.0–0 Ba4 16.Rfc1?? Bc2–+ (17.Rc2 d5–+) 0–1. Lopez – Harthimmer,Arne, corr 3GMM–45, 1996.

2.a3 ab4=+

3.a4 d6 4.Bb2 Qd7 5.c3 Qe6 (5...Nc6 6.cb4 Nb4 7.e4–/+) 6.e3 (6.cb4 Nc6 7.Bc3 Nf6=+) 6...Na6 7.Nf3 Qg4 8.h3 Qh5 9.g4? (Better is 9.Ba6 Ra6 10.cb4=) 9...Bg4!–+ 10.hg4? (Better is 10.Bg2 Bf5 11.Nd4 Qd1 12.Kd1–+) 10...Qh1 11.Ke2 (11.Qe2 c6–+) 11...c5 12.Ng5 h5 13.Ne4 hg4 14.Ng3 Qg1 15.Qb3 Rd8 16.Nf5 d5 17.cb4 Rh1 18.Ng3 Rh2 19.Qd5 Rd5 20.Nc3 Qf2 21.Kd1 Rd2 22.Kc1 Qe1 23.Nd1 Qd1# (23...Rd1?!=) 0–1. Tiedemann,Marcel – Rettkowski,Marcel, RSM2002 remoteschach.de, 2002.

3.Bb2 ba3 4.Na3 Nc6 5.Nc4 Ra1 6.Ba1 d5 7.Ne3 e6 8.c3 Nf6 9.Nc2 Be7 10.e3 Bd7 11.Bb5 0–0 12.Nf3 Na7 13.Bd3 c6 14.c4 Qc7 15.cd5 cd5 16.Ncd4 b5 17.0–0 b4 18.Qb1 Nc6 19.Nc6 Bc6 20.Rc1 Qd7 21.Qc2 Ba4 22.Qb1 Rb8 23.Bc2 b3 24.Bd3 h6 25.Be5 Rb7 26.Ba6 0–1. Nautiluschess – meregrand, ICS, 2001.

3.Bb2 e6 4.c3 ba3 5.Ba3 Ba3 6.Ra3 Ra3 7.Na3 Qe7 8.Nb5 Qc5 9.Qb3 Na6 10.Nf3 Nf6 11.g3 Ng4 12.e3 c6 13.d4 Qb6 14.Nd6 Ke7 15.Qb6 Kd6 16.Ba6 ba6 17.Qb8 Ke7 18.h3 Nf6 19.Ne5 Rd8 20.Ke2 d6 21.Nc6 1–0. golfx – christian1294, kurnik, 2012. (=1.a3 a5 2.b4)

3.Nf3 Nf6 =+.

2.Ba3 ab4=+

3.Bb4 Ra4 4.a3 Na6 (better is 4...Nc6!? 5.Nc3 Ra6=) 5.c3 (5…b5 6.d4–/+; better is 5.Nc3 Rb4 6.ab4 Nb4 7.Ra8+/–). ahmed sharkawy_1 – Ruthless Rook, ChessWorld.net, 2005.

3.Bb4 Nc6 4.Bc3 e5 5.e3 Nf6 6.Bc4 (better is 6.Nf3!? e4 7.Ne5–/+) 6...d5–+ 7.Bb3 Bc5 8.h3 (8.d4 ed4 9.ed4 Bb6–+) 8...d4 9.ed4 ed4 (9...Bd4?! 10.Nf3–+; 9...Nd4?! 10.Nf3–/+) 10.Bb2 d3 11.cd3 Nb4 (11...0–0!? 12.Ne2 Nb4 13.Bc4–+) 12.Qe2 Be6 13.Na3?? (13.d4 Bd4 14.Bd4 Qd4 15.Nc3–+) 13...Nd3 14.Kf1 0–0 (14...Ra3?! 15.Ba3 Ba3 16.Be6 fe6 17.Qe6 Qe7 18.Qe7 Ke7 19.Nf3–+) 15.Bf6 (15.Be6 Re8 16.Nc4 Re6 17.Ne3–+) 15...Qf6 16.Nf3 (16.Rb1 Nf2 17.Qf3 Nh1 18.Qf6 gf6 19.Nb5 Ng3 20.Ke1–+) 16...Qa1 17.Bd1 Ra3 18.g4 Nf2 (18...Nf4 19.Ne1 Ne2 20.d3 Nf4 21.Rh2 Qd1 22.f3 Bc4 23.Rf2 Ra2 24.Kg1 Rf2 25.dc4 Qe1) 19.Kg2 Bd5 20.Rf1 Bf3 21.Qf3 Rf3 22.Kf3 Qf6 23.Kg2 (23.Kg3 Qd6 24.Kg2 Ne4 25.Rf3 Qd2 26.Be2 Qe2 27.Kh1 Qf3 28.Kh2 Rd8 29.a3 Rd2) 23...Qh4 0–1. grahamtrue (2165) – pcmvr, net–chess.com, 2015.

2.ba5 c6

3.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.ba5).

3.Nc3 d5 4.Nf3 Bg4 (4...d4 5.Ne4=) 5.Rb1 Qc7 6.e4 de4 (6...d4 7.Ne2 e5 8.Ng3=) 7.Ne4 Ra5 8.Qe2 Ra2 (8...e6!?=) 9.Rb7+= Qd8 (9...Qb7 10.Nd6 Double attack (10.Nd6 Decoy)) 10.Bb2 Bf3 (better is 10...e6+=) 11.Qf3+– (worse is 11.gf3 Ra8+/–) 11...Nf6?? (11...Ra8+–) 12.Bf6 (better is 12.Nf6 gf6 13.Rb8 Qb8 14.Qc6 Kd8 15.Qd5 Qd6 16.Qa2 Bh6 17.Qa8 Kc7 18.Qa7 Kd8+–) 12...gf6 (12...Rc2 13.Qd1 Qc8+–) 13.Bc4 Ra1 14.Ke2 Rh1 (14...Bg7 15.Ra1 0–0+–) 15.Nf6! ef6 (15...ef6 16.Bf7 Mate attack) 16.Bf7# 1–0. usingprogram – dlugibolek, internet, 2011.

3.e3 Qa5 4.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Qa5 4.e3).

3.Nf3 Qa5 4.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Qa5 4.Nf3).

2.b5 c6

3.a4 b6 (--> 2.b5 b6 3.a4 c6).

3.a4 Nf6 4.Bb2 e6 5.d4 Be7 6.c4 (6.e3 0–0= (6...d5 7.Ba3 Ba3 8.Ra3 0–0 9.Nf3 Nbd7 10.Bd3 c5 11.0–0 c4=; 6...b6 7.Bd3 d5 8.Nf3 0–0 9.0–0 Ne4 10.c4 Bb7 11.Nbd2 Nd2=; 6...Bb4 7.c3 Be7 8.Nf3 0–0 9.Bd3 cb5 10.ab5 b6 11.0–0 d5+=) 7.Nf3 d5 8.Ba3 Nbd7 9.Be2 cb5 10.Bb5 Nb6 11.Be7 Qe7=; 6.Nf3 cb5 7.ab5 0–0 8.c4 b6 9.e3 Bb7 10.Ra4 Ne4 11.Ba3 Ba3=; 6.Ba3 0–0 (6...d6 7.Qd3 cb5 8.ab5 Qc7 9.e4 b6 10.c4 Bb7 11.Nc3 Nbd7=; 6...cb5 7.ab5 d6 8.Qd3 Nbd7 9.e4 0–0 10.Nf3 b6 11.Nbd2 Bb7=) 7.Be7 Qe7 8.e3 d6 9.Nf3 e5 10.Be2 Bg4 11.0–0 Rc8=) 6...0–0 (6...b6 7.e3 0–0 8.Nf3 d5 9.Ba3 c5 10.dc5 bc5 11.Nc3 Bb7=; 6...d5 7.e3 0–0 8.Ba3 cb5 9.ab5 b6 10.Nf3 dc4 11.Bc4 Bb7=) 7.Nf3 (7.e3 b6 8.Nf3 d5 9.Ba3 c5 10.dc5 bc5 11.Nc3 Bb7=) 7...d5 8.c5 (8.e3 b6= 9.Ba3 c5 10.dc5 bc5 11.Nc3 Bb7=) 8...b6+= (8...Ne4 9.Nfd2 f5 10.e3 e5 11.Be2 ed4=) 9.cb6 (9.Qc2 bc5 10.dc5 Ne4 11.Bd4 cb5–/+) 9...cb5 (9...Qb6 10.e3+= (10.Ba3 Bb4 11.Bb4 ab4+=) 10...Bb4 11.Bc3 Bd6+=) 10.b7 (10.ab5 Nbd7= 11.Ba3 Nb6+=) 10...Bb7+= 11.ab5 Bb4 (11...Qb6+=) 12.Bc3 Qe7 13.Qb3 Bc3 (13...Rc8 14.Bb4 ab4 15.Ra8 Ba8 16.Qd1+=) 14.Nc3= Nbd7 15.e3 Qb4 (15...Ne4 16.Bd3=) 16.Nd2 (16.Rb1 Qd6=) 16...Rfc8 17.Na2 (17.Na4 Ne4 18.Qa2 Nd2 19.Qd2 Rc2 20.Qb4 ab4–+) 17...Qb3 18.Nb3 a4 19.Nd2 Rc2 (19...e5 20.de5 Ne5 21.Be2+=) 20.Nb4 (20.Bd3 Rb2 21.Ke2 e5=) 20...Rb2+= 21.Rb1 (21.Na6 Rc8+=) 21…a3 (21...a3 22.Rb2 ab2=). Langschmidt,Dirk (2100) – Gottwald,Bernhard (1925), RSS7E basic–22, 2010.

2.b5 e6

(--> 1.b4 e6 2.b5 a5).

3.Bb2 Nf6 4.a4 d5 5.e3 c6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 a5).

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

3.Nf3 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Nf3 e6).

2.b5 f5

3.Bb2 Nf6 4.Nf3 e6 5.e3 b6 (5...d5 6.c4=) 6.Be2 Bb7 7.d3 Be7 8.a4 (8.Nbd2!?+=) 8...0–0= 9.Nbd2 Qe8 10.0–0 d6 11.Nd4 Qf7 12.N2f3 (12.Bf3 Bf3 13.N2f3 Nh5+=) 12...h6 (12...Nd5 13.Nd2=) 13.Nd2 Nbd7 14.Bf3 Bf3 15.N2f3 Nh7 16.Nc6 Bf6 17.c3 g5 (17...e5 18.Qc2=) 18.Qc2 (18.h3 Bg7+/–) 18...g4+= 19.Nfd4 Ng5 20.f4 gf3 21.Nf3 Qg7 22.Kh1 Kh8 23.Nfd4 Rae8 24.Rae1 Ne5 25.e4 fe4 26.de4 Nc6 27.Nc6 (worse is 27.bc6 Bd4 28.cd4 Qg6+=) 27...Nf7 28.Nd4 Ne5 29.Ba1 Nd7 30.Rf3 Nc5 31.Rg3 (31.Nc6 Bh4 32.Ref1 Rf3 33.Rf3 Bf6+=) 31...Qh7+= 32.Rf3 (32.c4 d5 33.ed5 ed5=) 32...d5–/+ 0–1. jeich (1830) – baitang (1980), gameknot.com, 2014.

3.c4 Nf6 4.Nf3 g6 5.Nc3 Bg7 6.g3 d6 7.Bg2 e5 (7...Ne4 8.Bb2+=) 8.0–0 0–0 9.c5 Nh5 (9...Ne4 10.cd6 cd6 11.Qc2+/–) 10.Qb3 (10.cd6!? cd6 11.d3+/–) 10...Kh8+/– 11.cd6 cd6 12.d3 f4 (better is 12...Nd7!?+/–) 13.Ba3+– Nf6 14.Ng5 Qe7 15.Rac1 h6? (15...Bg4 16.h3 Bf5 17.g4+–) 16.Nge4 Ne8?? (16...a4 17.Qb2 Ne4 18.Ne4 Qe6+–) 17.Nd5 Qd8 18.Ne7! Bf5 (18...Qe7 19.Rc8 Deflection) 19.Nf5 gf5 20.Nd2 Nd7 (20...a4 21.Qb2 fg3 22.hg3+–) 21.Bb7 Rb8 22.Bc6 Ndf6 (22...Nb6 23.Nf3+–) 23.Nc4 h5 (23...Rg8 24.e3+–) 24.e4 (24.b6 Bh6 25.Rcd1 fg3 26.fg3 Ng4+–) 24...Bh6 25.Rc2 (25.Rcd1 Ng4 26.b6 fg3 27.hg3 h4 28.ef5 hg3 29.fg3 Ne3+–) 25...Rg8 26.ef5 h4 27.d4! e4 (27...ed4 28.Be8 Combination) 28.Re1 hg3 29.hg3 e3 30.fe3 Rg3 31.Rg2 Rg2 32.Kg2 (worse is 32.Bg2 a4 33.Qa4 fe3 34.Ne3 Nc7+–) 32...Nh5 33.ef4 Nf4 (33...Qh4 34.Rh1 (34.Re8?? Re8 35.Ne5 Nf4 36.Kf1 de5–+; 34.Be8 Nf4 35.Kf1 Qh1 36.Kf2 Qg2 37.Ke3 Re8 38.Ne5 Re5 39.de5 Ne6 40.Kd3 Qd2 41.Kc4 Qd4) 34...Qg4 35.Kf2 Qf4 36.Ke1 Qf5 37.Qf3 Qf3 38.Bf3 Rb5 39.Bh5 Rb1 40.Bd1+–) 34.Kf1 Qg5 (34...Qh4 35.Nd6 (35.Be8 Qh1 36.Kf2 Qg2 37.Ke3 Re8 38.Ne5 Re5 39.de5 Ne6 40.Kd3 Qd2 41.Kc4 Qd4; 35.Re8 Re8 36.Ne5 de5 37.de5 Re5–+) 35...Nf6 36.Nf7 Kh7 37.Nh6 Kh6 38.Qf3+–) 35.Nd6 Nd6 (35...a4 36.Qe3 Nd6 37.Bd6+–) 36.Bd6 Rg8 37.Qe3 Qh4 38.Be5 Kh7 39.f6 1–0. marekt (2150) – baitang (2005), gameknot.com, 2015.

3.Nf3 Nf6 4.c4 g6 5.Nc3 Bg7 6.g3 d6 7.Bg2 0–0 8.Qc2 e5 9.0–0 Nbd7 10.d3 Nc5 11.Rb1 Nh5 (11...Re8 12.Bg5+=) 12.Bg5 Bf6 13.Bh6 Bg7 14.Bg7 Kg7 (14...Ng7 15.d4 ed4 16.Nd4+=) 15.d4+/– ed4 16.Nd4 Rb8 17.Qb2 Ne6 18.Rfd1 Nd4 19.Rd4 Nf6 (19...b6 20.Nd5 Nf6 21.Rh4+/–) 20.c5!+– White prepares the advance b6 20...Be6 (20...dc5 21.Qa3 Double attack (21.Rd8 Pinning; 21.Rd8 Deflection; 21.Qa3 Decoy)) 21.b6 cb6?! (21...c6 22.cd6 Re8+–) 22.Rd6 Qe8 23.Rb6 Bc4 (23...Rc8 24.Rb7 Rf7 25.c6+–) 24.c6 1–0. kostini (2020) – baitang (1975), gameknot.com, 2014.

3.Nf3 Nf6 4.e3 b6 (4...e6 5.Bb2+=) 5.Bb2 (5.Ba3 Bb7+=) 5...e6 6.Be2 Bb7 7.c4 g6 (7...a4 8.0–0+=) 8.0–0+/– Bg7 9.Ng5 h6 10.Nh3 Kf7 11.Nf4 Qe7 (11...d6 12.Nc3+=) 12.Bf3+/– Bf3 13.Qf3 (13.gf3?! e5 14.Ne2 Re8=) 13...Ra7 14.d4 g5 (14...Ne4 15.Qe2+/–) 15.Nd3 d6 16.Nc3 Nbd7 17.e4 f4 (better is 17...g4!? 18.Qe3 Re8+–) 18.e5+– de5 (18...Ne8 19.Ba3+–) 19.de5 Nh7 20.Ne2 Kg8 21.Nd4 Qe8 22.g3 fg3 (22...Ne5 23.Ne5 Be5 24.Rae1 Bd4 25.Bd4+–) 23.fg3 (23.Qg3?! a4 24.Nc6 Ra8+–; 23.hg3?! Nhf8 24.Nc6 Ra8+–) 23...Nhf8 (23...Ne5 24.Ne5 Be5 25.Rae1+–) 24.Nc6 Ra8 25.Nf2 Ng6 (25...Nc5 26.Ng4 Nfd7 27.Nf6 Bf6 28.ef6+–) 26.Ng4 Kh7 27.Nf6 Bf6 28.ef6 Qf7 29.Rad1 Rhe8 (29...Rhf8+–) 30.Rd7! Qd7 (30...Qd7 31.f7 Passed pawn) 31.f7 (31.f7 Rf8 32.Qf6+–) 1–0. mikleol (2225) – baitang (1955), gameknot.com, 2014.

2.b5 h5

3.Bb2 e6 4.c4 d5 5.e3 c5 6.Nf3 Nf6 7.a4 Nbd7 8.Nc3 Ne4 9.Be2 f5 10.d4 b6 11.cd5 Nc3 12.Bc3 ed5 13.dc5 Nc5 14.0–0 Ne4 15.Be5 Bb7 16.Rc1 Bd6 17.Bg7 Rg8 18.Bh6 Qf6 19.Bf4 Bf4 20.ef4 Qg7 21.g3 h4 22.Nh4 1–0. elektrooon – przbik, kurnik, 2012.

3.e3 Nf6 4.Bb2 =.

3.e3 h4 4.Bb2+= a4 (4...Nf6 5.Nf3+=) 5.a3 (5.Nf3 d5+=) 5...e6 (5...Nf6 6.Nf3+=) 6.c4 (6.Nf3 d5+=) 6...b6 (6...Nf6 7.Nc3+=) 7.Nc3 Bb7 8.h3 (8.Nh3 Nf6+=) 8...Nf6 9.Nf3 d5 10.d4 Nbd7 (10...c6 11.Na4 Bd6 12.c5 bc5 13.dc5+/–) 11.Bd3 Bd6 12.Na4 dc4+= 13.Bc4 Qe7 14.Qb3 Bf3+= 15.gf3 e5 16.de5 Ne5+= 17.Be5 Be5 18.Nc3 Nd7 19.Ke2 Nc5 20.Qb4 0–0= 21.Ra2 Qg5 22.Raa1 Qg6 23.Rac1+= Bd6 24.Rhg1 Qf5 25.Qb1 Qe5 26.Rg4 Be7 27.Nd5 Bd8?? 28.Rcg1 Ne6 29.f4 Qh5 30.f3 Qh6 31.Qb2 Ra4 32.Bb3 Ra5 33.a4 Ra8 34.Kf2 Rc8 35.Ke2?? Kh8?? 36.Qa3 Re8 37.Kf2 c5 38.Bc4 Qh7 39.Qc3 Ra8 40.Qb3 Qh6 41.Rd1 ½–½. Nogues,Pierre (1700) – Sion,Philippe (2230), Avoine op, 1994.

3.Nf3 d5 =.

2.c3 d5

3.a3 ab4 4.cb4 e5 5.Bb2 Bd6 6.d3 f6 7.e3 Be6 8.g3 Nd7 9.Bg2 Ne7 10.Nf3 c6 11.0–0 0–0 12.Nbd2 Bg4 13.Qb3 Kh8 14.Rac1 f5 15.Ba1 e4 16.de4 fe4 17.Nd4 Rf7 18.h3 Bh5 19.Ne6 Qe8 20.Ng5 Rf8 21.Ne6 Rg8 22.a4 Ne5 23.b5 Nd3 24.Rb1 Bf7 25.Nd4 c5 26.Nf5 Nf5 27.Rbd1 d4 28.ed4 Bb3 29.Be4 Bd1 30.Rd1 Nd4 31.Bd3 Rf8 32.Ne4 Qe6 33.Ng5 Qf6 34.Ne4 Qe5 35.Kg2 Rae8 36.Rf1 Qd5 37.Kg1 Re4 38.Be4 Qe4 39.h4 Nf3 40.Kg2 Qg4 41.Rc1 Nd4 42.Bd4 cd4 43.Rc4 Qf3 44.Kg1 Qf2 45.Kh1 Qg3 46.Rd4 Rf1 0–1. mzs78 – gambitiste (1605), kurnik, 2012. (=1.c3 d5 2.b4 a5)

3.Qa4 Bd7 4.b5 Na6 5.e3 Nc5 6.Qd4 e6 7.Ba3 b6 8.Bc5 bc5 9.Qe5 Nf6 10.a4 Bd6 11.Qg5 0–0 12.Bd3 c4 13.Bc2 h6 14.Qh4 c6 15.bc6 Bc6 16.f3 Nd7 17.Ne2?? Qh4 (18.g3 Qh3–+) 0–1. audrey – melagxoli, Live Game Caissa's Web, 2004.

3.Nf3 ab4 4.cb4 e5 (better is 4...Nf6+=) 5.g3? (better is 5.Ne5 Bb4 6.Qb3+=) 5...e4–+ (5...Bb4?! 6.Ne5 Nf6 7.Bg2+=) 6.Ne5? (better is 6.Nd4 Bb4 7.Bb2–+) 6…f6 (6...Bb4?! 7.h3–+) 0–1. Colin – Wall,Bill, internet, 2000.

2.c3 e5

3.Bb2 ab4 4.cb4 Bb4 5.Be5 (--> 2.c3 ab4 3.cb4 e5 4.Bb2 Bb4 5.Be5).

3.Bb2 f6 4.a3 (--> 1.b4 e5 2.Bb2 f6 3.a3 a5 4.c3).

2.e4 ab4–/+

3.Bb2 d5 4.ed5 Qd5 5.a3 e5 6.ab4 Ra1 7.Ba1 Bb4 8.Nc3 Bc3 (8...Qd7 9.Nf3 Nc6 10.Bb5=+) 9.Bc3 Nf6 10.f4 (10.Nf3 Nc6–/+) 10...Nc6 11.Be5 Ne5–/+ 12.fe5 Qe5 13.Qe2 Qe2 14.Be2 Bf5 15.d3 Kd7 16.Kd2 Re8 17.Bf3 b5 18.Ne2 Bg4 19.Bg4 Ng4 20.Rb1 c6 21.c4 bc4 22.Rb7 Kd6–+ 23.Rf7 cd3 24.Nf4 Re7 25.Re7 Ke7 26.h3 Ne5 27.Nd3 Nd3 28.Kd3 Kd6 29.h4 h5 30.Kd4 c5 31.Ke4 Ke6 32.Ke3 Kf5 (33.g4 Kg4–+) 0–1. Leoni,Carlos – Dunn,Michael, corr IECC, 1996.

3.Bb2 Nf6 4.e5 Nd5 5.Bc4 Nb6 6.Bb3 Na4 7.Ba4 Ra4 8.c4 Nc6?? 9.Qa4+– e6 10.Nf3 b6 11.0–0 Bc5 12.d4 Be7 13.Qa8 0–0 14.a4 ba3 15.Ba3 Ba3 16.Na3 Qe7 17.Nb5 Na5 18.Qe4 Nc4 19.Ra8 f6 20.Rfa1 fe5 21.de5 Qc5 22.Na7 Nd2 23.Nd2 Qf2 24.Kh1 Rf4 25.Rc8 Kf7 26.Qh7 Qd2 27.Qg8 Kg6+– 28.Qe8 Kg5 29.Qe7 Kg4 30.Qg7 Kf5 31.Rf8 Ke4 32.Rf4 Kf4 33.Rf1 Ke4 34.Qg4 Kd5 35.Rd1 Qd1 36.Qd1 Kc5 37.Qd7 (37...Kc4 38.Qc7 Kd4 39.Nc6 Kc4 40.Qb6 Kc3 41.Qb4 Kd3 42.Qb3 Ke2 43.Nd4 Kd2 44.h4 Ke1 45.Qc2 Kf1 46.Qe2#) 1–0. gtate (1930) – lucperetti (2155), net–chess.com, 2005.

3.d4 d5 4.e5 e6 5.Nf3 Ne7 6.Bd3 Nf5 7.0–0 Be7 8.c3 Nc6 9.cb4 Bb4 10.a3 Ba5 11.Bg5 f6 12.ef6 gf6 13.Bh4 Nh4–+ 14.Nh4 Ke7 15.Qg4 Qg8–+ 16.Qh5 Nd4 17.Nf3 Nf3 18.Qf3 Qg5 19.Bc2 Rg8 20.g3 Rg7 21.h4? Qh4 22.a4 Bd7 23.Qa3 Bb4 24.Qb3 Rag8 25.Kg2 d4 26.Qb4 Kf7 27.Qb3 Bc6 28.Kg1 Qh1# 0–1. gdraper (2035) – pcmvr (2110), net–chess.com, 2006.

3.d4 e6 4.Nf3 d6 5.Bc4 f6 6.0–0= Ne7 7.Re1 Ng6 8.Bb2 Be7 9.c3 d5=+ 10.ed5 Qd6?? 11.de6+– Ra5? 12.Nbd2 (12...Nf4 13.Ne4+/–; 12.cb4 Qb4 13.Qc2 Nf4+–) 1–0. gtate (1930) – mahermasri, net–chess.com, 2005.

2.ba5 Ra5

3.a3 e5 4.Bb2 Bd6 5.Bc3 Ra8 6.Nf3 Nf6 7.e3 Nc6 8.Bb5 0–0 9.Bc6 bc6 10.Ne5 Be5 11.Be5 d6 12.Bf6 Qf6 13.c3 Bf5 14.0–0 Bb1 15.Rb1 Ra7 16.Ra1 Rfa8 17.d4 Ra3 18.Ra3 Ra3 19.Qc2 Qe6 20.Rb1 g6 21.c4 Kg7 22.d5 cd5 23.Qb2 Qe5 24.Qa3 dc4 25.Rc1 d5 26.Qc3 Qc3 27.Rc3 Kf6 28.f4 Kf5 29.Kf2 Ke4 30.g4 c5 31.h4 d4 32.ed4 cd4 33.Rc4 Kd3 34.Rc7 Kd2 35.Rf7 d3 36.Rd7 Kc2 37.Ke3 d2 38.Rd2 Kc3 39.Rd7 Kc4 40.Rh7 1–0. riditko – almirsampion, kurnik, 2012.

3.Ba3 Rb5 4.c4 Rb1?? (better is 4...Ra5=) 5.Rb1+– b6 6.c5 Nf6 7.cb6 cb6 8.e3 Ne4 9.Qc2 Bb7 10.Bd3 (10.Qb3!? Nc6+–) 10...Ng5 (10...Nd2 11.Kd2 Bg2+–) 11.Nf3 (better is 11.f3!?+–) 11...Bf3 12.gf3 Nf3 13.Kf1 e6 (better is 13...Nc6+/–) 14.Bh7?? (better is 14.Bf8 Kf8 15.Be2+–) 14...Ba3–+ 15.Be4 Nh2 16.Ke2 Na6 17.Rbg1 (better is 17.Qb3 Nc5 18.Qb6–+) 17...Nc5?? (17...Bf8 18.Rg2 Nb4 19.Qb1=) 18.Bg2?? (18.Rg2!? Ne4 19.Qe4=) 18...Qg5?? (18...d5!? 19.Qc3 Qa8 20.Qg7 Qa6 21.Kd1 Qa4 22.Ke2 Qb5 23.Kd1–+) 19.Ba8? (better is 19.d4=+) 19...Qh5–+ 20.f3 f5 (20...Qe5 21.Be4 Ne4 22.Qe4 Qb5 23.Qd3 Qd3 24.Kd3–+) 21.d4? (better is 21.Rg2!?–/+) 21...d5–+ 22.dc5? (better is 22.Rf1 Ne4 23.Qc7–+) 22...Qf3 23.Kd3 Qe4 24.Kd2 (24.Kc3 Qe3 25.Qd3 Qc5 26.Kd2 Qa5 27.Kc2 Qa8 28.Qb5 Ke7 29.Rg7 Kf6 30.Rg3–+) 24...Nf3 25.Kd1 Rh1 26.Rh1 Qg4 27.Rh8 (27.Bc6 Kf7 28.Qe2–+) 27...Kf7 28.Qe2 Qg1 29.Kc2 Qc1 30.Kb3 Nd2 (better is 30...Bc5 31.Bd5 (31.Qf3?? Qb1 32.Kc3 Bb4 33.Kd4 Qb2 34.Kd3 Qd2) 31...Qb1 32.Kc3 Bb4 33.Kc4 ed5 34.Kb5 Bc5 35.Ka6–+) 31.Ka4 b5! 32.Qb5 (32.Kb5 #Decoy to b5 32...Qc5) 32...Qc2 33.Ka5 Nc4 (better is 33...Qc5 34.Ka6 Kf6 35.Qc5 Bc5–+) 34.Ka6=+ Qa2?? (34...Kf6 35.Rf8 Kg5–+) 35.Qd7+– Kf6 36.Qd8 Ke5?? (better is 36...Kg6 37.Qe8 Kf6 38.Qd8 Kg6 39.Qe8 Kf6 40.Qd8=) 37.Kb7 (better is 37.Qc7 Ke4 38.Qf4 Kd3 39.Qd4 Kc2 40.Rh2 Kb1 41.Qd1 Bc1 42.Ra2 Ka2 43.Qc1+–) 37...Qb3 (37...Bc5 38.Kc6 Be3 39.Qb8 Ke4 40.Qb4–+) 38.Kc7 (38.Kc8 Bc5 39.Qc7 Nd6 40.Kd7–+) 38...Bc5 39.Kd7 Nb6 (39...Qa4!? 40.Bc6 Qa7 41.Qc7 Qc7 42.Kc7 Ne3 43.Re8–+) 40.Ke8 Qa4 41.Kf7 Qa7 (41...Qa8? 42.Qc7 Bd6 43.Qc3 Ke4 44.Ra8 Na8 45.Qc6+– (45.Ke6?! Nc7 46.Kf7 Be5+–); 41...Na8?! 42.Qb8 Bd6 43.Qb2 Ke4 44.Ke6–/+; 41...Be3?! 42.Qc7 Ke4 43.Ke6–+) 42.Kg6 Qa1 (better is 42...Na8 43.Qg5 Be3 44.Ra8 Qa8 45.Qe3 Kd6 46.Kg7 Qb7 47.Kg6 Qb2–+) 43.Qc7= Ke4 44.Rh4? (44.Qc5 Qf6 45.Kh7 Qh6 46.Kg8 Qe3 47.Qb4 Ke5 48.Rh1+– (48.Kg7 Na8 49.Qb2 d4 50.Qb8 Ke4+/–)) 44...Kd3–+ 45.Qc5?? (45.Rh3 Qf6 46.Kh7–+) 45...Qf6 (45...Na8?? 46.Rd4 Qd4 47.Qd4 Ke2 48.Qe5+–) 46.Kh7 Qh4 (46...Na8?? 47.Qa3 Qc3 48.Rd4 Kc2 49.Qa2 Qb2 50.Rd2 Kd2 51.Qb2 Ke3 52.Qe5 Kd2 53.Qe6+–) 47.Kg7 Qg5 48.Kf8 (48.Kf7 Qe3 49.Qb5 Kd2 50.Qb2 Ke1 51.Qb1 Kf2 52.Bc6–+) 48...Nd7 49.Ke8 0–1. pinecrest1981 – cheeze12, Live Game Caissa's Web, 2004.

3.Ba3 Nc6 4.Qc1 e5 5.Bf8 Kf8 6.Qb2 Nf6 7.Nf3 Qe7 8.e3 Qb4 9.Qc3? (better is 9.Qc1+=) 9...Ne4–+ 10.Bd3?? (better is 10.Qb4 Nb4 11.Bd3–+) 10…Nc3 (10...Nc3 11.Nc3 d5–+) 0–1. kinderchocolate (2250) – pcmvr (2860), net–chess.com, 2011.

3.Ba3 e6 4.Bf8 Kf8 5.Nc3 Qf6 (5...Nf6 6.e3=) 6.e3 (better is 6.Nf3=) 6...b5 (better is 6...Ne7!?=) 7.Nb5 c6 (7...Ba6!?+/–) 8.Nd6+– Ke7?? (8...Qd8 9.Qf3 Nf6 10.e4+–) 9.Nc4 (better is 9.Nc8 Kf8+–) 9...Rd5 (9...Ra7 10.Rb1 Bb7 11.d4+–) 10.Nf3 (better is 10.Nb6!? Ba6 11.Nd5 cd5 12.Ba6 Na6+–) 10...Ba6 11.Nb6 (better is 11.Rb1 Nh6+–) 11...Rb5? (better is 11...Ra5+–) 12.Bb5 Bb5 13.Nd4 Ba6 14.c3 c5 15.Nb3 c4 16.Nd4 Nc6 17.0–0 Nd4 18.ed4 d5 19.Qa4 Nh6 20.Qd7 Kf8 21.Qd6 (21...Qe7 22.Qb8 Qe8 23.Qa7+–) 1–0. pinecrest1981 – rubber, Live Game Caissa's Web, 2005.

3.Bb2 Rb5 4.Bc3 (4...Nc6 5.e4+=). pinski – Ruthless Rook, ChessWorld.net, 2005.

3.Bb2 c5 4.e4 e6 5.a4 Nc6 6.Bb5 Nf6 7.e5 Nd5 8.Nf3 Be7 9.Nc3 0–0 10.0–0 Nc7 11.d3 b6 12.Bc6 dc6 13.Nd2 Nd5 14.Nce4 Ra8 15.Qg4 Ba6 16.Nd6 Nb4 17.Rfc1 Bg5 18.N2e4 (18.f4 Bh6+=) 18...Bh6 (18...Bc1 19.Bc1 Kh8+= (19...Nc2 20.Bh6 g6 21.Nf6 Qf6 22.ef6+–)) 19.f4 Nd5 20.g3 Qe7 (20...Qc7 21.a5 c4 22.dc4+/–) 21.a5+/– ba5 22.c4 Ne3 23.Qe2 Nf5 24.g4 Nd6 25.ed6 Qh4 26.g5 Bg5 27.fg5 (27.Ng5?! Qf4 28.Ne4 Bc8+–) 1–0. marekt – PeterRs, ChessWorld.net, 2015.

3.Bb2 c6 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Ra5).

3.Bb2 Rd5 4.g3 f6 5.Bg2 Rb5 6.Qc1 Nc6 7.Bc6 e5?? (better is 7...dc6 8.d4 Bf5=) 8.Bb5+– c6 9.Bc4 Nh6 10.Nc3 d5 11.Bb3 Ng4 12.Nf3 Nh6 13.a4 Bd6 14.e3 b6 15.Ba3 Bc7 16.0–0 Ba6 17.d3 Rf8 (17...f5 18.Na2+–) 18.Bf8 (18.Bf8 Kf8 19.e4+–) 1–0. diablo005 – astrooman, kurnik, 2012.

3.Bb2 f5 4.c4 Nf6 5.e3 d6 6.d4 Nbd7 7.Nf3 h6 8.Bd3 e6 9.0–0 g5 10.Nc3 g4 11.Nd2 Bg7 12.e4 f4 13.e5 de5 14.de5 (better is 14.Nb3!? Ra8 15.Bg6 Ke7 16.a4+/–) 14...Ne5–/+ 15.Be4 (15.Be2 g3–/+) 15...0–0 16.Qc2 c6 (16...Ne4 17.Nce4 f3 18.Bc3 fg2 19.Kg2–+) 17.Rfe1 h5 (17...g3!? 18.fg3 Qb6 19.Kh1 Neg4–+) 18.Rad1 Qc7 (worse is 18...Ne4 19.Nb3 (19.Qe4 g3 20.Nb3 gf2 21.Kf2 Qh4 22.Kg1 Ng4–+) 19...Qc7 20.Ne4= (worse is 20.Re4 Ra8–/+)) 19.Nb3 Nc4 20.Na5 Na5?? (better is 20...Nb2 21.Qb2 Ne4 22.Re4 Qa5+=) 21.Ba3+– Nd5?? 22.Bd5 ed5?? 23.Bf8+– Kf8 24.Nd5! Qf7 25.Nb6 Be6 26.Qc5 Kg8 27.Qa5 h4 28.Qb4 h3 29.Nc8 hg2 30.Re6! Qe6 Blocks the square `8 31.Qe7 Qe7 32.Ne7 Kf7 33.Nf5 f3 34.Ne3 g3 35.hg3 b5 36.Rc1 Bd4 37.Rc6 Be3 38.fe3 Ke7 39.Rb6 Kf7 40.Rb5 Kf6 41.Kf2 Ke6 42.Rb1 g1B 43.Rg1 Kd5 44.Kf3 Kc4 45.Rd1 Kc3 46.e4 Kc2 47.Rd7 Kc3 48.e5 Kb4 49.e6 Ka3 50.e7 Ka4 51.e8Q Ka5 52.Qc8 Kb4 53.Rb7 Ka3 54.Qa8# 1–0. carocan (1830) – olichess1 (1760), kurnik, 2011.

3.Bb2 f6 4.Nf3 e5 5.g3 d5 6.Bg2 c6 7.0–0 Bd6 8.d3 Ne7 9.Nbd2 0–0 10.c4 Be6 11.Qc1 Nd7 12.Nb3 Ra7 13.Nfd2 Qb6 14.Re1 Rfa8 15.a3 Ba3 16.Ba3 1–0. giorgo – misjan, playok.com, 2012.

3.Nc3 c6 4.g3 b5 5.Bg2 d5 6.e3 b4 7.Nce2 e5 8.Nf3 e4 9.Nfd4 Bd7 10.0–0 g6 11.Bb2+= f6 12.Qc1 c5= 13.Nb3 Ra6 14.Nf4 c4 15.Nd4= Be7?? 16.Nd5+– f5 17.Nf5! Bf6 18.Nd4 Bd4 19.Bd4 Nf6 20.Nf6 Kf7 21.Nd7 Nd7 22.Bh8 Qh8 23.Be4 Nc5 24.Bd5 Ke7 25.Bc4 Rd6 26.d4 Ne4 27.Rb1 Rb6 28.a3 Nc3 29.Rb4 Rb4 30.ab4 Qc8 31.Bd3 g5 32.Qa3 Nd5 33.c4 Nf6 34.b5 Kf7 35.Qa7 Nd7 36.c5 Ke6 37.Qa6 Ke7 38.Qc8 (38...Nf8 39.Ra1 Kf6 40.Qf8 Ke6 41.Bf5 Kd5 42.Qf7) 1–0. mroets (2050) – tbear (1680), net–chess.com, 2002.

3.Nc3 d5 4.Nf3 =+.

3.Nc3 e5 4.a4 Bb4 5.Bb2 d5 6.Nb5 d4 7.c3 c6 8.cb4 Ra6 9.Na3 b5 10.ab5 cb5 11.Nb5 Ra1 12.Ba1 Bd7 13.Nd6 Ke7 14.Ne4 f5 15.Nc5 Kd6 16.Nb7 Kc7 17.Nd8 Kd8 18.e3 Ne7 19.ed4 Nd5 20.de5 Nb4 21.Qb3 N8c6 22.Bc3 Ne5 23.Be5 Re8 24.f4 g5 25.g3 gf4 26.gf4 Re5 27.fe5 Nd3 28.Bd3 Bb5 ½–½. aleksandras19 – feromont, kurnik, 2012.

3.Nc3 e6 4.Bb2 Nf6 5.e4 Be7 6.Bc4 0–0 7.Nf3 c6 8.e5 Ng4 9.d4 b5 10.Bd3 b4 11.Ne4 f5 12.ef6 Nf6 13.c3 bc3 14.Bc3 Ra8 15.0–0 d5 16.Ng3 c5 17.dc5 Bc5 18.Bf6 Qf6 19.Qc2 g6 20.Qc5 1–0. jackw171 – 6shakira4, kurnik, 2012.

3.Nc3 g6 4.Nf3 Bg7 5.e4 b5 6.Rb1 c6 7.a4 (7.d4 Na6 (7...Nf6 8.e5 Nd5 9.Nd5 cd5 10.Bb5 0–0) 8.Bd3= (8.a3 Nc7 9.Be2 Nf6 10.Ne5 Bb7) 8...b4 9.Ne2 Nf6 10.c3 c5) 7...Ba6 (better is 7...Bc3!? 8.dc3 Ra4= 9.e5 Na6 10.Be2 Nc5) 8.ab5+/– (8.d4 ba4 9.Bf4 d6 10.Ba6 Na6) 8...Bb5 (8...Bc3!? 9.ba6 Bg7+/– 10.d4 Na6; 8...cb5 9.d4 b4 10.Rb4 Nf6) 9.Nb5+– (worse is 9.Rb5 cb5 10.Nb5 Nc6+=; 9.Bb5?! Bc3 (9...cb5 10.Nb5 Nc6) 10.Bc4 Bg7+/–) 9...Qb6?? (better is 9...cb5 10.Bb5 Nc6+– 1.52/8 (10...Nf6+–)) 10.Nd6! (10.Nd6 ed6 11.Rb6+–) 1–0. pierre – kazaq, internet, 2011.

3.c4 b6 4.Bb2 Bb7 5.Qc2 Nf6 6.d3 g6 7.Nd2 Bg7 8.Ngf3 c5 9.g3 Nc6 10.a3 Nd4 11.Bd4 cd4 12.Bg2 0–0 13.0–0 d6 14.Nb3 Rh5 15.Nbd4 e5 16.Nb5 Ng4 17.h3 Nh6 18.e4 f5 19.Qe2 Qd7 20.Nh2 f4? 21.g4+– Rh4 22.f3 g5 23.Rfd1 Nf7 24.d4 ed4 25.Nd4 h5 26.Nf5 hg4 27.Nh4 gh4 28.Ng4 Qc6? 29.Rab1+– Ba6 30.Bf1 Ne5 31.Ne5 Be5 32.Kh2 Kf7 33.Rd5 Rg8 34.Rb2! Bc4?? 35.Qc4 Qc4 36.Bc4 Bb2 37.Rg5 Kf6 38.Rg8 Ba3 39.Rb8 Bc5 40.Rf8 Ke5 41.Rh8 Bf2 42.Rh5 Kd4 43.Bb5 1–0. sagonek – fernendo (1770), kurnik, 2011.

3.c4 c5 4.Nc3 g6 5.Bb2 Bg7 6.e4 Bd4 7.Nf3+= e5 8.Bd3 Nf6 9.h3 Nh5 10.g3 0–0 11.Nd4 cd4 12.Nb5 Qb6 13.a4 d6 14.Ba3 Rd8 15.Be2 Nf6 16.d3 Be6 17.Rb1 Qc6 18.Bd6 Rd6= 19.Nd6 Qd6 20.Rb7 Nbd7 21.Qb3 Nc5–/+ 22.Rb8 Kg7 23.Qb6 Qb6 24.Rb6 Ra4 25.Rb1 Ra3 26.Kd2 Bd7 27.f4 Nb3?? 28.Ke1 Ba4 29.Kf2 Ra2 30.Rhe1 Nc5–/+ 31.fe5? Nd3–+ 32.Kf1 Ne1 33.ef6=+ Kf6 34.Re1 Bc6 35.Bf3 Ke5–+ 36.h4 Ra3 37.Kf2 Bd7 38.Rd1 Ra2 39.Ke1 h5 40.Rd2 Ra3 41.Ke2 Re3 42.Kf2 Bc6 43.Re2 Re2 44.Ke2 Be4 45.Be4 Ke4 46.Kd2 f5 47.Kc2 d3 48.Kd2 Kd4 49.c5 Kc5 50.Kd3 Kd5 51.Ke3 Ke5 52.Kf3 Kf6 53.Kf4 Ke6 54.Kg5 Kf7 55.Kf4 Kf6 56.Ke3 g5 57.Kf3? gh4–+ 58.gh4 Ke5 59.Kg3 f4 60.Kf3 Kf5 61.Kg2 Kg4 62.Kf2 f3 63.Kg1 Kg3 64.Kh1 Kf2 65.Kh2 Ke2 (66.Kg3 f2 67.Kf4 f1Q 68.Kg5 Qf3 69.Kg6 Qg4 70.Kh7 Ke3 71.Kh6 Ke4 72.Kh7 Kf5 73.Kh8 Kf6 74.Kh7 Qg7) 0–1. alaamattar (2170) – pwillows (2025), net–chess.com, 2006.

3.c4 e5 4.Nc3 =+.

3.c4 g6 4.Nc3 Bg7 5.Qc2 Nc6 6.e3 Nh6 7.a3 0–0 8.d4 e6 9.Nf3 b6 10.Be2 Bb7 11.0–0 Ne7 12.Bd2 Bf3 13.Bf3 (13.gf3?! c5 14.d5 Nhf5=) 13...d5 14.cd5 Nd5? (better is 14...ed5 15.Rfb1 Ra8+/–) 15.Nd5+– Rd5 16.Bd5 ed5 17.Rac1 Nf5 18.Qc7 Qc7 19.Rc7 Ra8 20.Bb4 Bf8 21.Bf8 Kf8 22.Rb7 Ra3 23.Rb6 Ra5 24.h3 h5 25.Rc1 Kg7 26.Rc5 Ra1 27.Kh2 Ra2 28.Rd5 Rf2 29.Re5 Nh4?? 30.Kg3 Rg2 31.Kh4 Kh6 32.e4 Rd2 33.d5 Rd4 34.Rf6 Kg7 35.Rf4 f6 36.Re7 Kf8 37.Re6 g5 38.Kh5 gf4 39.Rf6 Ke7 40.Rf4 Kd6 41.Kg4 Ke5 42.h4 Rd1 43.Rf8 Ke4 44.Rd8 Ke5 45.Kg5 Rg1 46.Kh6 Kf5 47.h5 Kf6 48.Rd6 Ke7 49.Rg6 Rd1 50.d6! Kf7 51.Kh7 Rh1 52.h6 Rd1 53.d7! Rd7 54.Rg7 Ke8 55.Rd7 Kd7 56.Kg7 Ke7 57.h7 Ke6 58.h8Q Kf5 59.Qh3 Kg5 60.Qg3 Kf5+– 61.Qe3 Kg4 62.Kg6 Kh4 63.Qg1 Kh3 64.Kf5 Kh4 65.Qg4# 1–0. slax1 – tyk, kurnik, 2011.

3.d3 d5 4.Bd2 Rc5 (4...Ra8 5.Nf3=+) 5.Nf3 (5.d4 Rc6=) 5...f6 (5...Nd7 6.d4 Rc6 7.e3=) 6.e3 Qd6 (Better is 6...Rc6!?+=) 7.Bb4+/– Na6 (7...e5 8.d4 ed4 9.Nd4+–) 8.Bc5+– Nc5 9.Nc3 c6 10.Be2 Nh6 11.0–0 Bg4 12.Rb1 Bf3 13.Bf3 g6 14.d4 Ne6 15.Rb7 Qa3 16.Rb8 Kf7 17.Qd2 Qa7 18.Rfb1 Bg7 19.R8b7 Qa8 20.g4 Rb8 21.Rb8 1–0. y – Calrisian, Live Game Caissa's Web, 2004.

3.d4 c5 4.d5 g6 5.Bb2 f6 6.a4 Bg7 7.Nf3 d6 8.Bc3 Ra8 9.e3 Bd7 Attacking the isolated pawn on a4 10.Nbd2 Kf7 11.Qb1 Ra7 12.Bb5 Bf5 13.e4 Bd7 14.0–0 Na6 15.Qb2 h6 16.Bd7 Qd7 17.Nc4 Rh7 18.h3 e6? (better is 18...Qc7+–) 19.Rfd1 e5 (19...ed5 20.Rd5 Kf8+–) 20.Qb6 Ra8 21.Nd6 Kf8 22.Nb7 Ne7 23.Qb5 White prepares d6 23...Kf7 24.Qd7 Bf8 25.Ne5! fe5 26.Qe6 Ke8 27.d6 Nb4 28.d7 1–0. pierred (2765) – grahamtrue (2125), net–chess.com, 2011.

3.e3 b5 4.Bb2 c6 5.Nf3 Nf6 6.Be2 e6 7.0–0 Be7 8.d3 0–0 9.Nbd2 Nd5 10.c4 Bf6 11.Bf6 (worse is 11.cd5 Bb2 12.Rb1 Bf6 (12...Ra2? 13.Qb3 Ra6 14.Qb2+–) 13.dc6 Nc6=) 11...Nf6 12.d4 d5 13.cb5 cb5 14.Nb3 Ra3 15.Bb5 Qb6 16.Be2 Ne4 17.Qc2 Ba6 18.Ba6 Qa6 19.Nc5 Nc5 20.Qc5 Ra2 21.Ra2 Qa2 22.h3 Na6 23.Qa7 Nb4 24.Qa2 Na2 25.Ra1 Nc3 26.Ra7 h6 27.Kf1 Ne4 28.Ne5 g6 29.f3 Nd2 30.Ke2 Nc4 31.Nc4 dc4 32.Rc7 Ra8 33.Rc4 Ra2 34.Kf1 Kg7 35.Rc3 g5 36.Rd3 Kf6 37.e4 White prepares the advance d5 37...h5 38.g4 h4 39.Kg1 Kg6 40.d5 ed5 41.ed5 Ra7 42.Kf2 Rd7 43.Ke3 Rd6 44.Ke4 Kf6 45.f4 Rd7 46.fg5 Kg5 47.Rf3 f6 48.Kd4 Rd6 49.Kc5 Ra6 50.d6 Ra5 51.Kb6 Rd5 52.Kc7 Rc5 53.Kd8 Kg6 54.d7 Kf7 55.Re3 Rc6 56.Ra3 Rc5 57.Ra7 Ke6 58.Rc7 Rd5 59.Kc8 f5 60.gf5 Kf5 61.d8Q Rd8 62.Kd8 Kf4 63.Rc3 Ke4 64.Ke7 Kf5 65.Kd6 Ke4 66.Ke6 Kf4 67.Kf6 Ke4 68.Kg5 Kd4 69.Rf3 Ke4 70.Kg4 Ke5 71.Rf4 Ke6 72.Rf5 Ke7 73.Kf4 Ke6 74.Ke4 Kd6 75.Re5 Kc6 76.Rd5 Kc7 77.Ke5 Kc6 78.Ke6 Kc7 79.Rd6 Kb7 80.Kd7 (80.Kd7 Ka8 81.Kc7 Ka7 82.Rf6 Ka8 83.Ra6#) 1–0. exp2005 – sanyi49, kurnik, 2011.

3.e3 b6 4.Bb2 Bb7 5.Nf3 e6 6.Be2 Nf6 7.0–0 g6 8.d3 Bg7 9.Nbd2 0–0 10.c4 c5 11.Nb3 Ra8 12.Re1 d5 13.cd5 ed5 14.Qc2 Nc6 15.Red1 Nb4 16.Qb1 Ba6 17.a3 Nc6 18.Qc2 Qb8 19.Rdb1 Rc8 (19...Qd6 20.a4=) 20.Nbd2 (20.Nc5!? Ne7 21.Na6 Rc2 22.Nb8 Re2 23.Be5+/–) 20...Nd7 21.Bg7 Kg7 22.Qb3 Nf6 23.Qb6+/– c4 24.dc4 dc4 25.Bc4 Qd6?? 26.Ba6 Rcb8 27.Qb8! Rb8 28.Rd1 Rb2? 29.Bf1 Ne5 30.a4 Nc6?? 31.Nc4+– Qc5 32.Nb2 Qc2 33.Nd3 Ne4 34.a5 Nc3 35.Rdc1 Ne2 36.Be2 Qe2 37.Nf4 Qa6 38.Rcb1 Na5 39.Rb4 Qd6 40.Rd4 Qc5 41.Rd5 (41.Rd5 Qc3 42.Rda5+–) 1–0. exp2005 – fakazer (1690), kurnik, 2012.

3.e3 c6 4.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Ra5 4.e3).

3.e3 Nc6 4.Bb2 e5 5.Nf3 d6 6.d3 Bg4 7.Be2 Nf6 8.Nbd2 Qa8 9.a3 Be7 10.h3 Bh5 11.0–0 0–0 12.Re1 Nd5 13.c4 Nb6 14.Qb3 Kh8 15.d4 ed4 16.ed4 Bf6 17.Ne4 Nd7 18.Nf6 Nf6 19.d5 Bf3 20.Bf3 Ne5 21.Be2 Nfd7 22.Qc3 f6 23.Bf1 Nc5 24.f4 Na4 25.Qb3 Qa7 26.Kh2 Nb2 27.fe5 Nc4 28.Qc4 Rc5 29.Qb3 fe5 30.Bd3 Qa5 31.Be4 b6 32.Rf1 Qa8 33.Qd3 Ra5 34.Rf8 Qf8 35.Rf1 Qg8 36.Rc1 Ra7 37.Qf3 Qd8 38.Rf1 Ra8 39.Qh5 Qg8 40.Rf7 Ra3 41.Rc7 g6 42.Qg5 Qf8 43.Rd7 Ra4 44.Rd8 Kg7 45.Rf8 Kf8 46.Qd8 Kg7 47.Qd6 Re4 48.Qb6 Rd4 49.Qc7 Kh6 50.Qe5 1–0. exp2005 – krakencz, kurnik, 2012.

3.e3 e5 4.Bb2 Nc6 5.Nf3 Nf6 6.d4 e4 7.Nfd2 (7.Ne5 Bb4 8.Nd2 0–0=) 7...d5 8.c4 dc4 9.Bc4 b5 (9...Bb4 10.Qc2=) 10.Be2 Be7 (10...Bb4 11.Bc3+=) 11.a3 (11.Nb3 Ra6 12.Bb5 Rb6+/–) 11...Be6 12.Bc3 (12.Qc2 Qd7+=) 12...Ra8 (better is 12...b4!? 13.ab4 A) 13...Bb4? 14.Ra5 Bc3 15.Rc5 (15.Nc3?! Na5 16.Qa4 c6+–) 15...Bd2 16.Nd2+–; B) 13...Ra1 14.Ba1 Nb4=) 13.Bb5+/– Bd5 14.Qc2 0–0 15.a4 (15.Bb2 Na7 16.Be2 Rc8+/–) 15...Na5 (15...Qd6 16.a5+=) 16.Na3 c6 17.Ba5 (17.Be2 Qc7+/–) 17...Ra5 (better is 17...Qa5 18.Bc4 Qa4 19.Qa4 Ra4 20.Bd5 cd5+=) 18.Bc6+/– Ba3 (better is 18...Bc6 19.Qc6 Qa8 20.Qa8 Rfa8+/– (20...Raa8? 21.Nac4+–)) 19.Ra3 (19.Bd5 Nd5 20.Ra3+–) 19...Qd6?? (better is 19...Qc7 20.Rc3 Rc8+=) 20.Rc3+– Rc8 21.Bd5 Rb8 22.Rc8 Rc8 23.Qc8 Qf8 24.Qf8 Kf8 25.Be4 Ra4 26.Ke2 g6 27.Rd1 Ng4 28.h3 Nh6 29.g4 f5 30.gf5 gf5 31.Bc6 Ra2 32.Kf3 Ke7 33.d5 Kd6 34.Nc4 Kc5 35.Rd4 Nf7 36.Be8 Ng5 37.Kg3 Ne4 38.Kf4 Rf2 39.Ke5 White prepares the advance d6 39...Rf3 40.Bh5 Rh3 41.Kf5 Ng3 42.Kg4 Rh5 43.d6 Rh4 44.Kg3 Rd4 45.ed4 Kc4 46.d7 1–0. Fournier,Frederic – Cadet,Yves, Ch Club, 1994.

3.e3 Nf6 4.Bb2 e6 5.Nc3 Be7 6.d3 0–0 7.d4 d5 8.Bd3 Nbd7 9.Nf3 c5 10.dc5 Nc5 11.Be2 b6 12.0–0 Ba6 13.Ba6 Ra6 14.Qe2 Ra8 15.g3 Na4 16.Na4 Ra4 17.Ne5 Qc7 18.Qb5 Ra5 19.Qd3 Ne4 20.c4 Nc5 21.Qc3? Na4–+ 22.Qc2 Nb2 23.Qb2 dc4 24.Qc3?? b5 25.Nf3 Bf6 26.Nd4 Qc5?? 27.Qa5+– Bd4 28.ed4 Qd4 29.Qb5 Rc8 30.Qb7 Qc5 31.Rac1 c3 32.a4 g6 33.a5! Rc7 34.Qb8 Rc8 35.Qb7 Rc7 36.Qb6 Qc4 37.a6 Rc6 38.Qb8 Rc8 39.Qb7 Rc7 40.Qf3 Qa6 41.Rc3 Rc3 42.Qc3 Qd6 43.Qf6 Qd7 44.Rb1 Qc8 45.Rd1 1–0. sunnyda – abaol, kurnik, 2012.

3.e3 g6 4.Bb2 f6 5.Nf3 Bg7 6.Na3 c6 7.Nc4 Rh5 8.Be2 Rh6 (8...b5 9.Na3=) 9.0–0 (9.Bc3 Na6+/–) 9...Qc7 (Better is 9...d5 10.Na3 e5=) 10.Rb1?? (Better is 10.e4!?+/–) 10...g5 11.g3 d5 12.Na3 g4 13.Ng5 fg5?? 14.Bg7+– Qd6 15.Rb3 Rh3 16.Bg4 Bg4 17.Qg4 Qd7 18.Qd7 Nd7 19.Bh8 e5 20.Rb7 Nc5 21.Rc7 Ne7 22.Be5 Ne4 23.d3 Nd2 24.Kg2 g4 25.Bf6 Nf5 26.Rh1 h5 27.Rc6 Nf3 28.Rc5 Kf7 29.Bd8 Ke8 30.Rd5 N3h4 31.Bh4 Nh4 32.gh4 Rh4 33.h3 gh3 34.Rh3 Rg4 35.Kf3 Ra4 36.Nc4 Ra2 37.Rhh5 Rc2 38.Rh8 Kf7 39.Ne5 Ke6 40.Rhd8 Rc1 41.d4 Rh1 42.R5d6 Ke7 43.R8d7 Ke8 1–0. Hardin – Flip4, Live Game Caissa's Web, 2004.

3.e4 d5 4.d3 de4=+ 5.Bd2 Re5 6.Qe2 Bf5 7.Qd1?? ed3–+ 8.Be3 dc2 9.Qd8 Kd8 10.Nc3 e6 11.Nf3 Ra5 12.Nd4 Bg6 13.Be2 Ba3 14.0–0 Bb2 15.Rab1 cb1Q 16.Nb1 Ra2 17.Rd1 Nd7 18.Nd2 Ra1 19.h3 Rd1 20.Bd1 Bd4 21.Bd4 Ngf6 22.Ba7 Ke7 23.Ba4 Ra8 24.Bd7 Ra7 25.Be6 Ke6 26.Ne4 Ne4 27.f3 Nd2 28.g4 Nf3 29.Kg2 Be4 30.Kg3 g5 31.Kf2 Ke5 32.Ke3 Ra3 33.Ke2 Kf4 34.Kd1 Ra2 35.Kc1 Ke3 36.Kd1 Ra1 0–1. sburritt – nay (2190), net–chess.com, 2006.

3.Nf3 b5 4.Bb2 Ra4 5.g3 h5 6.Bg2 h4 7.0–0 Nf6 8.Nc3 Rc4 9.d3 Rc5 10.Ba3 (worse is 10.gh4 Rch5=) 10...Rch5 11.Qd2 h3 12.Bh1 Bb7 13.Rab1 Bf3 14.ef3 c6 15.Ne4 Nd5 16.c4 Nc7 17.cb5 Nb5 18.Bc5 Na6 19.Be3 e6 20.Qc2 Qc7 21.Rb3 Be7 22.a3 0–0 23.a4 Nd6 24.Qb2 c5 25.Rc1 Nf5 26.Qd2 Nb4?? 27.Bf4 Qa5 28.Qc3 d6 29.Qc4 Nd4 30.Rbc3?? Ne2 31.Kf1 Nc1 32.Rc1 d5 33.Qb5 Qb5 34.ab5 de4 35.de4 Nd3 36.Rc3 Nf4 37.gf4 Rb8 38.Ke2 Rb5 39.Kd3 e5 40.fe5 Re5 41.f4 Re6 42.Bf3 Rd6 43.Ke2 Rb2 44.Ke3 Rdb6 45.Be2 R6b3 46.Kd3 Rc3 47.Kc3 Re2 48.Kd3 Re1 49.f3 f6 50.e5 fe5 51.fe5 Re5 52.f4 Rh5 53.Ke3 Kf7 54.Kf3 Kf6 55.Kg4 Rd5 56.Kh3 Kf5 57.Kg3 Rd2 58.h4 c4 59.Kf3 c3 60.Ke3 Rh2 61.Kd3 c2 62.h5 c1Q 63.Kd4 Qf4 64.Kd5 Rh5 65.Kc6 Kg4 66.Kd7 Bf6 67.Ke6 Re5 68.Kd7 Qf5 69.Kc6 Rc5 70.Kb7 Qc8 71.Kb6 Rc6 72.Kb5 Qb7 73.Ka4 Ra6# 0–1. linakip – ciesielkaa, kurnik, 2011.

3.Nf3 b6 4.e3 Bb7 5.Bb2 Nf6 6.Be2 g6 7.c4 Bg7 8.Bc3 Ra7 9.Qc2 0–0 10.0–0 Nc6 11.d4 Qa8 12.Nbd2 d6 13.Rfd1 Re8 14.Nb3 Nd7 15.a4 e5 16.d5 Ncb8 17.a5 Na6 18.ab6 cb6 19.h3 Rc8 20.Qb2 Rc7 21.Ng5 Bc8 22.Ne4+/– Bf8 23.f3 Nac5+= 24.Nbc5 bc5 25.Ra7 Ra7= 26.Ra1 f5 27.Nd2 Bh6 28.Kf2 Kf7 29.Nb3 Bg5 30.Na5 Nb8 31.Qb6 Be7 (31...Ra6 32.Qc7 Nd7 33.Nc6 Ra1 34.Ba1=) ½–½. Emberger,Rene – Fauland,Peter (2220), Graz op, 2002.

3.Nf3 e6 4.Nc3 b6 5.Bb2 Bb7 (5...Nf6 6.e3 Bb7 7.Bc4 Bc5 8.0–0 0–0 9.Re1 d5 10.Bb5 Qd6+= –0.38) 6.e3 Nf6 7.Bd3 (7.Be2 Be7 8.0–0 0–0 9.Nd4 Nc6 10.Nb3 Ra7+= –0.28) 7...Bf3 (7...e5 8.Bc4 d5 9.Bb5 c6 10.Be2 Bd6+= –0.53) 8.Qf3 Bb4 (8...Nc6 9.Be2 Nb4 10.Kd1 Bc5= –0.06) 9.Nb5 (9.a3 Bc5 10.Qg3 Bd6+= 0.28) 9...0–0 (9...Na6 10.Qg3 Bf8+= 0.37) 10.a3 (10.Bf6 Qf6 11.Qf6 gf6 12.Nc7 d5+/–) 10...Bc5 (10...Be7 11.0–0=) 11.Be5 (11.Bc3 Ra4 12.Bf6 gf6 13.Qg3 Kh8 14.Qc7 Qc7 15.Nc7 Nc6+/–) 11...d6 12.Bc3 e5? (better is 12...Ra4!? 13.Bf6 gf6+=) 13.Ba5+– ba5 14.Qb7 Nd5?? (better is 14...c6 15.Nc3 d5+/–) 15.Qd5+– c6 16.Qe4 f5 17.Qc4 d5 18.Qc5 cb5 19.Bb5 Qg5 20.Qd5 Kh8 21.0–0 f4 22.ef4 Qf4 23.Rae1 h6 24.Re5 Rf7 25.Re8 Rf8 26.Qd8 Re8 27.Qe8 Kh7 28.Bd3 g6 29.Qg6 Kh8 30.Qh7 1–0. pierret@chesscube.com – murxxer@chesscube.com (1605), ChessCube Game, 2011.

3.g3 Nc6 4.Bg2 Nf6 5.Nf3 h6 6.0–0 e6 7.c4 Be7 8.d3 0–0 9.Bd2 Ra8 10.Bc3 d5 11.Nbd2 dc4 12.Nc4 Ra7 13.Qd2 b6 14.a4 Bb7 15.Rfb1 Qc8 16.a5 ba5 17.Nfe5 (better is 17.Na5 Na5 18.Ba5+=) 17...Ne5–/+ 18.Bb7?? (better is 18.Be5 Bg2 19.Kg2–/+) 18...Rb7 (better is 18...Nc4 19.Bc8 Nd2–+) 19.Be5= Rb1 20.Rb1 Nd5 21.Qa5 Bb4? 22.Rb4+– Nb4 23.Qb4 Qa6 24.Qa5 Qc6 25.Qc7 Qa4 26.Bd6 Re8 27.Ne5 Qa8 28.Qf7 Kh8 29.Ng6 Kh7 30.Nf8 Kh8 31.Ne6 Qa1 32.Kg2 Qa8 33.f3 Qa1 34.Qg7! Qg7 35.Ng7 Kg7 36.e4 Rd8 37.e5 Kf7 38.f4 Ke6 39.Kf3 Kf5 40.g4 Ke6 41.Ke4 Rb8 42.f5 (42.f5 Kf7 43.e6 Kg8 44.Bb8 Kg7 45.Be5 Kg8 46.f6 Kf8 47.Bd6 Kg8 48.f7 Kh7 49.f8Q Kg6 50.Qf7 Kg5 51.Qf5 Kh4 52.Qh5) 1–0. guddagudda – karelpavlik, kurnik, 2011.

3.Bb2 Ra8

4.Nc3 Nf6 5.Nb5 c6 6.Nd4 e5 7.Nf5 d6 8.Ne3 Ng4 9.Ng4 Bg4 10.f3 Be6 11.g3 g6 12.d4 Bg7 13.de5 d5 14.f4 0–0 15.Nf3 h6 16.Nd4 Qb6 17.Ne6 fe6 18.Bd4 Qb4 19.c3 Qe7 20.Qd3 Nd7 21.Qg6 c5 22.Be3 Ra3 23.Bd2 Rfa8 24.Bh3 Nf8 25.Qc2 h5 26.0–0 h4 27.g4 d4 28.g5 Qf7 29.Bg4 b5 30.Rf2 dc3 31.Bc3 b4 32.Bb2 Ra2 33.Ra2 Ra2 34.e3 Be5 35.fe5 Qc7 1–0. jackw171 – krzysztofekk6, kurnik, 2012.

4.Nf3 Nf6 5.d3 d6 6.e4 e5 7.Nbd2 Nc6 8.Be2 Be6 9.0–0 Be7 10.Ng5 (10.d4 Nd4 11.Nd4 ed4 12.Bd4 0–0= (worse is 12...Ra2 13.Ra2 Ba2 14.c4+/–)) 10...0–0 11.Ne6 fe6 12.Nc4 d5 (12...b5!? 13.Ne3 Nd4+=) 13.Ne5+= Ne5 14.Be5 de4 15.de4 Ne4 16.Bd3 (16.Bc4!? Bd6 17.Be6 Kh8 18.Qd4 Be5 19.Qe5+/–) 16...Nc5 17.Qg4 Bf6 (17...Rf7!?=) 18.Bh7+/– Kh7 19.Bf6 Qf6 20.Qh5 Kg8 21.Qc5 c6 22.a4 Rfd8 23.Qb6 Rd7 24.Rfd1 (24.Rae1 Ra4 25.Qb3 Qf4 26.Re6 Rf7 27.Re8 Kh7 28.Qh3 Kg6 29.Re6 Rf6 30.Qd3 Kh6 31.Rf6 Qf6+/–) 24...Rad8 (24...Ra4 25.Rac1 Rad4 26.Rd4 Qd4 27.Qb1=) 25.Rf1 Qc3 26.Qb3 Qf6 (better is 26...Qb3!? 27.cb3 Rd2+=) 27.Rae1+– Re8 28.Re2 Kf7 29.Rfe1 Rde7 30.Re3 Kg8 31.Rf3 ½–½. Schalkwijk,Peter – Lauer,Frederic, OP–2011–0–01857, 2011.

3.Bb2 b5

4.a3 e6 5.e3 c6 6.Nf3 (6.c4=) 6...b4 (better is 6...d5!?=) 7.ab4+/– Ra1 8.Ba1 Nf6 9.b5 cb5 10.Bb5 Be7 11.0–0 Ba6 12.Ba6 Na6 13.c4 Nc5 (13...0–0 14.Qe2+/–) 14.Bf6 Bf6 15.d4 Ne4 16.Qc2 Ng5 17.Ng5 Bg5 18.Nd2 0–0 19.Rb1 Qc7 20.Qb2 Be7 21.Qb7 Qb7 22.Rb7 Rd8 23.c5 Kf8 24.Nc4 Ke8 25.Kf1 f5 26.Ke2 g5 27.Nb6 g4 28.f4 h5 29.Ra7 h4 30.Kd3 Bf6 31.e4 fe4 32.Ke4 h3 33.g3 Bg7? (33...Bh8+–) 34.c6! dc6 (34...Bd4 35.cd7 Rd7 36.Ra8 (36.Nd7 Ba7 37.Nf6 Ke7 38.Ng4 Bg1+–) 36...Ke7 37.Nd7+–) 35.Rg7 Kf8 36.Rc7 Re8 (36...Kg8 37.Nd7 Kf7 38.Ne5 Ke8 39.Ng4+–) 37.Nd7 Ke7 38.Ne5 Kd8 39.Ra7 Kc8 40.Ra8 Kc7 41.Re8 Kd6 42.Rc8 Ke7 43.Ra8 Kd6 (43...c5 44.dc5 Kf6 45.c6 Ke7 46.c7 Kd6 47.c8Q Ke7 48.Qd8#) 44.Ra7 c5 45.Rd7# 1–0. Fournier,Frederic (1700) – Nikkola,Jouni, Redhotpawn.com, 2012.

4.e3 b4 5.Nf3 Nf6 6.Be2 Nc6 7.0–0 (7.a3 e6=) 7...d6 (7...Bb7 8.a3=) 8.a3 ba3 (8...e5 9.ab4 Ra1 10.Ba1 Nb4 11.c4=) 9.Na3 e5 10.Nc4 Ra1 11.Qa1 e4 (11...Be7 12.Qa8 Bd7 13.Qb7=) 12.Nd4 Nd4 13.Bd4 d5 (13...Be7 14.f3+=) 14.Ne5 Bd7 (14...Bd6 15.Bb5 Nd7 16.Ng4+–) 15.Nd7 Nd7 16.Bg7 Rg8 17.Bf8 Nf8 (17...Kf8 18.f3 Nc5 19.fe4 Ne4 20.Qb2+/–) 18.Bb5+– Nd7?? (better is 18...Ke7+–) 19.Qe5 Qe7 20.Bd7 (20.Qc7!? Kf8 21.Bd7 Rg6+–) 20...Kd7 21.Qe7 (better is 21.Qd5 Ke8 22.Qa8 Qd8 23.Qe4 Kf8 24.Rb1+–) 21...Ke7+/– 22.d3 (22.f3 f5+/–) 22...c5 23.de4 de4 24.Rd1 Ke6 25.g3 (better is 25.Kf1+=) 25...c4? (better is 25...Ra8=) 26.Rd4+– h5? (26...Ke5 27.Rc4 Rd8 28.Rc7+–) 27.Rc4 (27.Re4!? Kd5 28.Rd4 Kc5+–) 27...Kf5 (27...f5 28.Rd4+–) 28.Rc5 Kg6 29.c4 f5 30.Rc6 Kf7 31.c5 Ke7 (31...h4 32.Rh6+–) 32.Rh6 Rg5 (32...Rc8+–) 33.h4 Rg4 (33...Rg8 34.Rh5 Ke6 35.Rh6 Ke5 36.c6+–) 34.Rh5 Ke6 (34...Rg7 35.Rf5 Ke6 36.Rg5+–) 35.c6 (35.Rg5 Rg3 36.fg3 Ke7 37.Rf5 Ke6+–) 35...Kd6 (35...Rg7 36.Rh6 Ke5 37.Kg2+–) 36.Rf5 (36.Rg5 Rh4 37.Rg6 Kc7 38.gh4 Kb6 39.h5 Kc7 40.h6 Kb6 41.c7 Ka5 42.c8Q Kb5 43.Qc7 Ka4 44.Rb6 f4 45.Qa7) 36...Kc6 37.Rf4 Rg8 38.Re4 Kd5 39.Rd4 Ke5 (39...Ke6 40.g4+–) 40.Rf4 (40.f4 Ke6 41.Kf2 Rh8+–) 40...Rd8 41.Kg2 Rd2 (41...Rh8 42.Ra4+–) 42.h5 Rd6 43.Rh4 Kf5 (43...Re6 44.f4 Ke4 45.h6+–) 44.g4 Kg5 45.Kg3 Rd1 (45...Kf6 46.f4+–) 46.Rh2 (46.f4!? Kf6+–) 46...Rg1 47.Rg2 Rf1 (47...Re1 48.f4 Kh6 49.Kf3+–) 48.f4 Kf6 (48...Kh6 49.e4+–) 49.g5 Kf5 (49...Kf7 50.f5!+–) 50.h6 (50.g6 Kf6 51.Kh2 Rf3+–) 50...Rh1 (50...Kg6 51.e4 Rd1 52.Rh2+–) 51.Kf3 (better is 51.Rh2 Re1 52.Kf2+–) 51...Rh3 (51...Kg6+–) 52.Rg3 Rh4 53.g6 Rh6 54.g7 Rg6 (54...Rh5 55.g8Q Kf6 56.Qg7 Ke6 57.Rg6 Kf5 58.e4) 55.Rg6+– Kg6 56.g8Q Kf6 57.e4 1–0. Fournier,Frederic – castorscito, Active, 2007.

4.e3 Nc6 5.Nf3 =.

4.e3 e6 5.d4 Nf6 6.Bd3 Nc6 7.a3 Bb7 8.Nf3 b4 9.ab4 Ra1 10.Ba1 Nb4 11.Be2 Be4 12.Na3 Qa8 13.Bb2 Qb7 14.c3 (better is 14.Qc1!?+=) 14...Nc2!–/+ 15.Nc2 Qb2 16.Kd2?? (better is 16.Bd3 Qc3 17.Ke2–/+) 16...Bc2–+ 17.Qc2 Ne4 18.Kd3 (18.Kd1 Nf2 19.Ke1 Qc2 20.Kf2 Qc3 21.Rb1–+) 18...Qb5 19.c4 Nf2 20.Kd2 Bb4 21.Kc1 Ba3 22.Kd2 Qb4 (22...Qb4 23.Qc3 Ne4 24.Kd3 Qc3 25.Ke4 Qc2 26.Kf4 Bd6 27.Ne5 Qe2–+) 0–1. Duke of Wellington – marekt, ChessWorld.net, 2015.

4.e3 Nf6 5.Nf3 (5.Bc3!? b4 6.Bb4+/–) 5...c6 (5...Nc6 6.Be2=) 6.c4 b4 (6...bc4 7.Bc4 d5 8.Be2=) 7.d4 c5 (7...e6 8.Qb3+=) 8.a3 e6 9.ab4 Ra1 10.Ba1 cd4 (10...cb4 11.Bd3+=) 11.Bd4 (11.c5 de3 12.fe3 d6 13.Bf6 gf6 14.cd6 Bd6 15.Bb5 Ke7=) 11...Bb4= 12.Nbd2 0–0 (12...Nc6 13.Bb2=) 13.Bd3 (13.Qa1 Be7=) 13...Nc6 14.0–0 d6 (14...Nd4 15.ed4 Qa5 16.Qe2=) 15.Bf6+= Qf6 16.Ne4 (16.Qb1!? Qh6 17.Be4 Bd2 18.Bc6+=) 16...Qe7+= 17.Qc2 (17.Nd4 Nd4 18.ed4 d5 19.cd5 ed5=) 17...f5 18.Ng3 Bc5 19.Qd2 e5 Black prepares the advance f4 (19...Bb7 20.Rb1+=) 20.Be2 (20.Bf5!? Bf5 21.Nf5 Rf5 22.Qd5 Qf7 23.Qc6 Qc4 24.Ng5+=) 20...Be6+= 21.Rb1 g6 (21...Qf6 22.Qd1+=) 22.Qc2 (22.Ra1 Rb8+=) 22...f4 23.ef4 (23.Nf1 fe3 24.Ne3 Nd4 25.Nd4 ed4–/+ (25...Bd4?! 26.Bf3+=)) 23...Rf4 (23...ef4 24.Nf1 Bf5 25.Bd3–+) 24.Ne4 (better is 24.Qa4!? Nd4 25.Nd4 Bd4 26.Bf3=) 24...Bf5 25.Bd3 Nb4 26.Rb4 Bb4 27.Qa4 Be4 (27...Qb7 28.Nf6 Kf7 29.Bf5 gf5 30.Nh7 Rc4 31.Qb3–+) 28.Be4 Re4 (better is 28...Bc5–+) 29.Qa8+= Kg7 30.Qe4 Bc5 (30...Qa7 31.h3+=) 31.g3 (31.Kf1 h6=) 31...Qa7+= 32.Qe2 Qa1 33.Kg2 Qa8 34.Kg1 Qe8 (34...h6 35.Nd2=) 35.Nd2 (35.Ng5 h6 36.Ne4 Qe6=) 35...Qe6 36.Qd3 (36.Ne4 Bd4=) 36...Qf5 Attacks the backward pawn on f2 (36...g5 37.h3=) 37.Qe2 (37.Ne4 Bd4=) 37...Qc2 38.Kf1 Qc1 39.Kg2 Qc2 40.Kf1 ½–½. Labahn,Wolfgang – Huesemann, Espelkamp, 1980.

4.e4 c6 5.Nf3 (5.c4 bc4 6.Bc3 Ra8 7.Bc4 d5 8.ed5 cd5=) 5...Bb7 (5...d5 6.ed5 Qd5 7.Be2=) 6.c4+= b4 (6...e6 7.Qb3=) 7.d4 (7.a3 c5 8.d3 e6+=) 7...d6 (7...c5 8.Nbd2 cd4 9.Bd3+=) 8.Bd3 (8.a3 c5 9.d5 e5+=) 8...Nf6 (8...c5 9.a3+=) 9.0–0 (9.a3 c5 10.ab4 cb4 11.Ra5 Qa5+/–) 9...Nbd7 (9...d5 10.Nfd2+=) 10.Nbd2 (10.e5 de5 11.de5 Ng4+/–) 10...e5 (10...c5 11.e5 de5 12.de5+=) 11.Nb3+/– Ra8 12.de5 de5 13.Ne5 Ne5 (13...Nc5 14.Qf3+/–) 14.Be5 Bd6?? (better is 14...Nd7 15.Bb2 Qc7+/–) 15.Bd6+– Qd6 16.e5! (16.e5 Qd8 17.ef6 Qf6 18.Qe1 Qe7 19.Nc5+–) 1–0. Wall,Bill – BigAl, internet, 2004.

4.e4 e6 5.c4 b4 6.a3 =.

4.Nf3 Bb7 5.g3 Bf3 6.ef3 c5 7.Bg2 b4 8.c3 bc3 9.Bc3 Ra7 10.0–0 Nc6 11.Re1 e6 12.d3 f6 13.Nd2 d5 14.Nb3 e5 Black prepares the advance d4 15.f4 d4 16.Bb2 Qd6 17.fe5 fe5 18.Qf3 Nce7 19.a4 Nf6 20.Ba3 Nd7 21.Qh5 g6 22.Qf3 Bh6 23.Bh3 Rf8 24.Qg2 Nf5 25.Qe4 Rc7 26.Nd2?? Bd2–+ 27.Red1 Bc3 28.Rab1 c4 29.Bd6+– cd3 30.Bc7 d2 31.Be5 Kf7 32.Bd4! Bd4 33.Bf5 Nc5 34.Qd5 Kg7 35.Qd4 Rf6 36.Bh3 g5 37.Qd2 g4 38.Bg4 Ne4 39.Qd7 Rf7+– 40.Qd4 Nf6 41.Rb6 h5 42.Bh5 Rf8 43.Bf3 Kg6+– If Black now would get h4 in, he might survive 44.Qe5 Kg7 45.Rd7 Rf7 46.Rf7 Kg8 47.Qe6 Kh8 48.Qf6 Kg8 49.Rf8 Kh7 50.Rb7# (50.Be4#) 1–0. linakip – dominolargo, kurnik, 2012.

4.Nf3 e6 5.g3 (5.e3 Bb7=) 5...Bb7 6.Bg2 b4 (6...Nc6 7.0–0=) 7.d4 (7.c3 Nf6=) 7...Be7 8.0–0 h5 9.Nbd2 d5 (9...h4 10.c3=) 10.c4 h4 11.cd5 Bd5 12.Qc2 (12.e4!? Bb7 13.d5 hg3 14.fg3=) 12...hg3 13.fg3 Nf6 (13...Ra2? 14.Ra2 Ba2 15.Qa4 Nd7 16.Qa2+–; 13...Ba2?! 14.Ne5 Nf6 15.Bc6 Kf8 16.e4=) 14.e4 Bb7 15.Nc4? (15.Ne5 Ra6+=) 15...Ra7 (better is 15...Be4 16.Qe2 Ra7–+) 16.d5 ed5 17.ed5 Bd5 18.Nce5 (18.Rfe1 Nbd7+=) 18...0–0 (better is 18...Ra2 19.Ra2 b3–/+) 19.Ng5+= Bg2?? (19...Qd6 20.Rf6 Qc5 21.Qc5 Bc5 22.Rf2 Bf2 23.Kf2 Bg2 24.Kg2–/+) 20.Kg2 (20.Rf6 Bc5 21.Kg2 Qd2 22.Qd2+–) 20...Qd5= 21.Nef3 (21.Rf3 Qc5 (21...Ra2 22.Ra2 Qa2 23.Rf6 Qb2 24.Qb2 Bf6 25.Ne4 Be5 26.Qe5+–) 22.Qd3 Qd6=) 21...g6 (21...Nbd7!?–/+) 22.Rad1 (better is 22.Rfe1 Qc6 23.Qb3=) 22...Qc5 (22...Qc6 23.Qb3 Nbd7 24.Rd2+=) 23.Qb1?? (23.Qc5!? Bc5 24.Bf6 Ra2 25.Rd2 Rd2 26.Nd2+/–) 23...b3 (better is 23...Qf5 24.Qc1 Nd5–/+) 24.ab3 Ng4 (better is 24...Qb4!?+/–) 25.Bd4+– Qc6 (better is 25...Qa5 26.Qe4 c5 27.Qg4 cd4 28.Qd4 Qc5+–) 26.Ba7 Bg5 27.Kh3 (better is 27.Rde1 f5 28.Kg1+–) 27...Nd7?? (better is 27...Be3 28.Kg4 Qe6 29.Kh4 Ba7+–) 28.Ng5 Ne3 (28...Nde5 29.Qe4 Qe4 30.Ne4 f5+–) 29.Be3 Qe6 (29...Ne5 30.Bf4 Qf6 31.Rd5+–) 30.Kg2 (better is 30.Ne6 Ne5 31.Qe4+–) 30...Qe3 31.Rf3 (31.Rd7 Qg5 32.Qe4 Qh6+–) 31...Qg5 (31...Qe7 32.Qc1 Ne5+–) 32.Rdf1 (better is 32.Rd7 Qc5 33.Qe4+–) 32...Ne5 33.Rf4 Ng4 (33...Rd8 34.Qa1+–) 34.Qe4 Qh5?? (34...Ne5+–) 35.Rg4 f5 (35...Kg7+–) 36.Qe6 Rf7 37.Rh4 (37.Rg6 Qg6 38.Qg6 Kf8 39.Qh6 Ke8 40.Re1 Re7 41.Qg6 Kd8 42.Rd1 Rd7 43.Qg8 Ke7 44.Qg7 Ke6 45.Rd7 f4 46.Qf7 Ke5 47.Rd5 Ke4 48.Qe6) 37...Qe2 38.Rf2 (38.Qe2 Re7 39.Qe7 c5 40.Rh7 c4 41.Qg7) 38...Qe6–+ 39.Rh8 (39.Rh8 Kh8 40.Rd2–+; 39.Rb4–+). QQQ2 – manuel3, Live Game Caissa's Web, 2004.

4.Nf3 Nf6 5.d3 =.

3.Bb2 b6

4.Na3 Nc6 (4...Ba6 5.e3 Bf1 6.Kf1 Nc6 7.Nf3 d5 8.Qe2 Nf6) 5.Nc4 Rc5 6.e3 Ba6 7.Nd6 ed6 8.Ba6 Nb4.

4.Nc3 Nf6 (4...Nc6 5.e4 Nf6 6.Nf3 e5 7.Bc4 Bc5 8.0–0 0–0) 5.Nf3 Nc6 6.e4 Bb7 7.Bc4 Ne4 8.Ne4 d5.

4.e3 Bb7 5.Bc3 Ra8 6.Nf3 d5 7.Be2 Nd7 8.0–0 Ngf6 9.a4 e6 10.Bb2 c5 11.c4 Be7 12.Nc3 0–0 13.d4 dc4 14.Bc4 cd4 15.Nd4 Qc7 16.Be2 e5 17.Ndb5 Qc8 18.Rc1 Nc5 Black prepares the advance e4. Exerts pressure on the isolated pawn 19.Nd6 Bd6 20.Qd6 e4 21.Qb6+/– Ba6 22.Nb5+– Qf5?? 23.Rc5 Qg6 24.Bf6 gf6 25.Nc7 Rfb8?? 26.Qc6 Be2 27.Na8 Bf1 28.Kf1 Rb1 29.Rc1 Rc1 30.Qc1 Qf5 31.Nb6 Qa5 32.Qc8 Kg7 33.g3 (33.g3 Qb6 34.Qg4 Kf8 35.Qe4+–) 1–0. alfons78 – fakazer, kurnik, 2011.

4.e3 Bb7 5.Nf3 d6 6.Bd3 Nd7 7.0–0 Ngf6 8.Nc3 g6 9.Ne1 Bg7 10.Ne2 0–0 11.Ng3 Qa8 12.Qb1 Nc5 13.Bc3 Ra7 14.Be2 Na4 15.Bb2 Nb2 16.Qb2 Ne4 17.c3 Ng3 18.fg3 e6 19.Bf3 Bf3 20.Nf3 Qd5 21.Qc2 Rfa8 22.c4 Qf5 23.e4 Qc5 24.d4 Bd4 25.Nd4 Qd4 26.Kh1 Qe5 27.a4 Ra5 28.Ra2 Kg7 29.Qf2 f6 30.Qc2 h5 31.Rfa1 Rh8 32.Kg1 h4 33.g4 Qd4 34.Kf1 h3 35.g3 Rha8 36.Ke2 Re5 37.Kf3 f5 38.Rd1 fe4 39.Ke2 Qc5 40.Rf1 e3 41.Qd3 d5 42.Rc2 d4 0–1. world1star (1780) – viki930127 (1800), kurnik, 2012.

4.e4 Bb7 5.Na3 Nf6 6.Nc4 Ra4 7.e5 Nd5 8.Nf3 Nc6.

4.e4 Bb7 5.d3= Nf6 6.Nc3 Nc6 7.Nf3 e5 8.Be2 Bc5.

4.e4 Nf6 5.e5 Nd5 (5...Ne4 6.d3 (6.Nf3 Nc6 7.Nc3 d5 8.Be2 Bf5) 6...Nc5 (6...Ng5 7.h4 Ne6 8.Nd2 Nc6) 7.Nf3= (7.Nc3 Nc6 8.d4 Na4) 7...Na4 8.Bc3 Nc3) 6.Bc4 (6.c4 Nb4= (6...Nf4 7.Bc3 Ra7 8.g3 Ng6) 7.a3 N4c6 8.Nf3 e6) 6...e6 (6...Nc6 7.Nf3 Nf4 8.0–0 Bb7) 7.Nf3 f6 (7...Bb7 8.Nc3= Nc6; 7...Ba6 8.Ba6 Na6) 8.Nh4 (8.0–0= Nc6; 8.ef6 Nf6) 8...fe5 (better is 8...Nf4!? 9.ef6 gf6=; 8...Qe7+=) 9.Qh5+/– g6 10.Ng6! Nf6 (10...hg6 11.Qg6 Double attack (11.Qh8 Pinning; 11.Qh8 Deflection)) 11.Qh3 Rg8 12.Ne5 d6? (better is 12...Bd6!? 13.f4 Bb7+/–) 13.Be6+– Be6 (13...de5 14.Bc8 Qd5 15.f3+–) 14.Qe6 Qe7 15.Qc8 Qd8 16.Qd8 Kd8 17.Nc4 Rb5 (17...Nbd7 18.Na5 ba5+–) 18.Bf6 (18.Bf6 Kd7 19.Ne3+–) 1–0. Wall,Bill – Inman,Joey, chess.com, 2007.

4.Nf3 Bb7= (4...Nc6 5.e3 Nf6 6.Nc3 g6 7.Bb5 Bg7 8.0–0 0–0; 4...Nf6 5.e3 Nc6 6.Nc3 g6 7.Bd3 Bg7 8.0–0 0–0) 5.Na3 Nc6 6.Nc4 Rc5 7.e4 Ba6 8.Nd6 cd6.

3.Bb2 Nc6

4.Bc3 Ra8 5.Nf3 =.

4.e3 e5 5.Nf3 d6 6.d3 Nf6 7.Nbd2 Be7 8.Be2 Be6 9.a3 0–0 10.0–0 Bd7 11.c4 h6 12.Qc2 b6 13.d4 ed4 14.ed4 d5 15.c5 bc5 (15...Re8 16.Rfe1=) 16.Nb3+= Ra8 17.Nc5 Be8 (17...Bc5!? 18.dc5 Ne4+=) 18.Rfb1 Bd6 19.Bd3 Ne7 20.Bc1 (20.a4 Ra7+/–) 20...Nc8 (20...Bc5 21.dc5 Ba4 22.Qb2+=) 21.Bd2 Bc5 22.Qc5 Ne4 23.Be4 de4 24.Bb4 Nd6 25.Nd2 Bb5 (25...Ba4 26.Ba5 Nb5 27.Rb5 Bb5 28.Qb5 Qd4 29.Nb3+=) 26.Re1 (better is 26.Ne4!? Bd3 27.Nd6 cd6 28.Qd6 Qd6 29.Bd6 Bb1 30.Bf8 Kf8 31.Rb1 Ra3 32.Kf1+/–) 26...Re8= 27.Rac1 Bd3 28.Qc7 Nb5 29.Qf4 e4 draws heavy fire (better is 29.Qd8!? Rad8 30.Nb3=) 29...Nd4+= (worse is 29...Na3 30.Ba3 Ra3 31.Ne4 Be4 32.Re4+/–) 30.Rc7 Qd5 31.Qg4 Nc2 32.Rc5 Qe6 33.Qe6 Re6 34.Rc1 Nd4 (better is 34...Nb4!? 35.ab4 Ra2–/+) 35.Rc8= Re8 36.Ra8 Ra8 37.Rc5 (37.Kh1 f5+=) 37...Nc2–/+ 38.Rc3?? (better is 38.f3 e3 39.Nb3–+) 38...Nb4–+ 39.Ne4 Be4 40.f3 (40.Rc4 Ra3 41.h4 Bg2 42.Kg2 Nd3–+) 40...Nd5 (better is 40...Na2 41.Re3 Bd5 42.Kf2–+) 41.Rc5 Ra3 42.fe4 Nf4 (42...Nf6 43.Rc4–+) 43.Rc4 Ra2 44.g3 Nh3 45.Kh1 Re2 (45...Ng5!? 46.Rc5–+) 46.Rc8 Kh7 47.Re8 (47.e5 Ng5 48.Rc3 Re5–+) 47...Re4! 48.Rb8 (48.Re4 Nf2 Double attack (48...Nf2 Decoy)) 48...Re2 49.g4 Nf2 (49...Rd2!? 50.Rb3 Nf2 51.Kg1 Ng4 52.h3–+) 50.Kg2 Ng4 (50...Nd3!? 51.Kg3–+) 51.Kf3 Rh2 52.Kg4 Ra2 53.Rb7 Ra4 54.Kf5 Ra5 55.Kg4 Kg6 56.Rb6 f6 57.Rb4 Rg5 58.Kh3 Rg1 59.Kh2 Re1 60.Kg2 f5 61.Kf2 Re4 62.Rb6 Kg5 63.Kg2 g6 64.Rd6 h5 65.Rd3 (65.Kf3 h4–+) 65...f4 66.Rd5 (66.Kf2 Kg4–+) 66...Kg4 67.Rd2 (67.Kf2 f3–+) 67...g5 (better is 67...Re2! 68.Re2 f3 69.Kf2 fe2 70.Ke2–+) 68.Kh2 f3 69.Kg1 (69.Rd5 h4 70.Rc5 Re2 71.Kg1 h3–+) 69...Re1 (69...Re1 70.Kf2 Re2 71.Re2 fe2 72.Ke2 Kg3–+) 0–1. Franco Rincon,David (1695) – Saber,Salah (1865), Cto Absoluto de Madrid, 2015.

4.e3 e6 5.Nf3 Nf6 6.d4 g6 7.Nc3 Bg7 8.Ne5 (8.e4 0–0=) 8...Nb4 (8...Ne5!? 9.de5 Re5–/+) 9.Qd2 0–0 10.Ne2 Qe7? (better is 10...Ra4=) 11.a3+– Re5? (11...Nc2 12.Qc2 d6+–) 12.de5 (12.ab4?! Ne4 13.Qc1 A) 13...Qb4? 14.c3 Nf2 15.cb4 (15.de5?! Qh4 16.Ra4 Nd3 17.Kd2 Qa4 18.Kd3 Be5=; 15.Kf2?! Rf5 16.Nf4 Qb6+–) 15...Nd3 16.Kd2 Nc1 17.Rc1+– (17.de5?! Nb3 18.Ke1 Na1 19.Ba1 d6+=; 17.Nc1?! Re4+–; 17.Bc1?! Rg5+–; 17.Kc1?! Re3 18.Kd2 Bh6+=); B) 13...Rf5+=; 12.Qb4?! Qb4 13.ab4 Rb5+/–) 12...Nfd5 13.ab4 Nb4 14.Ba3 c5 15.Bb4 cb4 16.Qd6 (16.f4 f6 17.ef6 Qf6+–) 16...Qd8?? (better is 16...Qd6 17.ed6 Ba1+=) 17.Rb1 Re8 18.Qb4 (worse is 18.Rb4 Bf8 19.Qb6 Bb4 20.Qb4 f6 21.ef6 Qf6+–) 18...Be5 19.Nd4 d6 20.Bd3 Bg7 21.0–0 d5 22.Nf3 e5 23.Be2 e4 24.Nd4 Bf8 25.Qc3 Bg7 26.Qd2 Qc7 27.Qd1 Bd7 28.Bb5 Bc8 29.Be2 f5?? 30.h3 Bd7 31.Rc1 f4 32.c4 dc4 33.Rc4 Qd8 34.Rb4 Qg5 35.Bg4 Bg4 36.Qg4 Qe7 37.Qf4 Be5 38.Qg4 Qb4= 39.Qe4?? Qe7 40.Qd3 Bb8 41.Nf3 Rd8 42.Qc4 Kg7 43.Qc3 Kh6 44.Qc4 Rf8 45.Rb1+/– Qd6? 46.Qh4+– Kg7 47.Rb7 Bc7 (47...Bc7 48.Qd4 Kh6 49.Qd6 Bd6+–). dragonre – fakazer, kurnik, 2012.

3.Bb2 d5

4.e3 Ra8 5.Nc3 (5.Nf3 Nf6=) 5...Nc6 (5...Nf6 6.Nf3=) 6.Nf3 e6 7.Bd3 (better is 7.Bb5=) 7...Bb4 (better is 7...Nf6!?=) 8.Nd5!+/– ed5?? (8...Qd5 9.Bg7 Combination; 8...ed5 9.Bg7 Combination) 9.Bg7+– Nge7 10.Bh8 Ng6 11.Bg7 f6 12.c3 Bd6 13.Qc2 Qe7 (13...Kf7 14.Bh6+–) 14.Bg6 Kd8 15.Bf6! Qf6 16.Bh7 Qg7 (16...Ne7 17.h3+–) 17.0–0 (17.Qg6 Qg6 18.Bg6 Bg4+–) 17...Ke7 (17...Bg4 18.Qg6 Qg6 19.Bg6 Bf3 20.gf3+–) 18.Nh4 (18.Bf5 Be6+–) 18...Be6 (18...Qf6 19.Nf5 Bf5 20.Qf5+–) 19.Nf5 Bf5 20.Bf5 Rg8 21.g3 Ne5 22.f4 Ng4 (22...Nc4 23.e4+–) 23.Bg4 Qg4 24.Qb3 Rh8 (24...Qh5 25.Qb7 Rh8 26.Rf2+–) 25.Qd5 Rh7 (25...Qh3 26.Qg2 Qh6+–) 26.Qe4 Kd7 27.Qh7 Kc6 28.Qe4 Kd7 29.Qb7 Ba3 30.Qb5 c6 31.Qb7 Kd6 32.Qb8 Kc5 33.Qe5 Kb6 34.Rab1 Ka7 (34...Bb4 35.Rb4 Ka6 36.Ra4 Kb7 37.Rb1 Kc8 38.Rb8 Kd7 39.Ra7) 35.Qa5 1–0. kwuk – mikc, internet, 2009.

4.e3 Nf6 A) 5.Nc3 Nc6 (5...g6 6.Bd3 Nc6 7.Nf3 Bg7 8.0–0 0–0 9.Nb5 Bf5; 5...d4 6.ed4 Qd4 7.Nf3 Qb6 8.Rb1 Nc6 9.Bb5 e6; 5...e5 6.Nf3 Nc6 7.Nb5 Bd7 8.a4 e4 9.Ne5 Bb4; 5...Bd7 6.Nf3 Nc6 7.Nb5 e5 8.a4 e4 9.Ne5 Bb4) 6.Nf3 g6 7.Bd3 Bg7 8.0–0 0–0 9.Nb5 Bf5; B) 5.Nf3 Nc6 6.Nc3 g6 7.Nb5 Bg7 8.Bc3 Ra4 9.Qb1 0–0.

4.Nf3 Ra8 5.e3 c5 6.c4 Nf6 7.Nc3 e6 8.cd5 ed5 9.Bb5 Nc6 10.0–0 Bg4 11.Be2 Bd6 12.h3 Bh5 13.Qb3 Rb8 14.Kh1 (worse is 14.Nd5 Nd5 15.Bg7 Rg8–/+) 14...0–0 (better is 14...Be7!?=) 15.Nd5+/– Nd5 16.Qd5 Bg6 17.Qb3 Qc7 18.Qc3 f6 19.Bc4 Kh8 20.d4 cd4 21.Nd4 Nd4 22.Qd4?? (22.ed4 b5 23.Be6 Qe7+/–) 22...Rbd8?? (22...Be5!? 23.Qg4 Bb2 24.Rad1–+) 23.Qc3?? (better is 23.Qg4+/–) 23...Be5–+ 24.Qb3 Bb2 25.Qb2 Qc4 26.Rac1 (26.Qb7 Be4 27.Qb3 Qc6–+) 26...Qe4 27.Rc2?? (27.Rfd1 Bf7 28.Rd8 Rd8–+) 27...Bf5 (better is 27...Qc2 28.Qb7 Bd3–+) 28.Rfc1 Bh3 29.f3 Bg2! 30.Kg2 (30.Rg2 Qf3 Combination; 30.Kg2 Qe3 Combination) 30...Qe3 31.Rf1 h6 (31...Qg5!? 32.Kh1–+) 32.Qb7 Qg5 33.Kh1 Qh4 34.Rh2 Qd4 35.Rg1 Rd7 36.Qb3 Rff7 (36...Qf4 37.Re2–/+) 37.Qb8 Rd8 38.Qb3 Rdf8 (38...Re7 39.Qb5–/+) 39.Rg4 Qa1 40.Rg1 Qe5 41.Rhg2 f5 42.Rg6 Qf4 (42...Qf4 43.R6g2 Re7–+) 0–1. Fournier,Frederic (1825) – celtes (1850), Active, 2005.

4.Nf3 Nc6 5.a4 Nf6 (5...e6 6.Nc3 Nf6 7.e3 Bc5 8.Be2 0–0 9.0–0 Bd7; 5...Bd7 6.Nc3 Nf6 7.Nb5 e6 8.g3 Bb4 9.Bg2 0–0) 6.Nc3 e5 7.Nb5 Bc5 8.Be5 Ne5 9.Ne5 c6.

4.Nf3 Nc6 5.Nc3 d4 6.Ne4 f5 7.Ng3 f4 8.Ne4 Bf5 9.d3 Nf6.

4.Nf3 Nc6 5.e3 Bd7 6.d3 Qa8 7.Be2 Ra2 8.Ra2 Qa2 9.Qc1 e6 10.Nbd2 Bd6?? (better is 10...f6+=) 11.Bg7+– Nb4 12.Bh8 Nc2 13.Kd1 (better is 13.Kf1!? Ba3 14.Qb1 Qb1 15.Nb1 Bd6+–) 13...Ba4 14.Qb2?? (better is 14.e4+–) 14...Nd4–+ 15.Ke1 Qb2 (15...Qb2 16.Kf1 Qc1 17.Ne1 Bb4–+) 0–1. Fournier,Frederic (1895) – jispo2 (1680), Active echecs21.com, 2004.

4.Nf3 Nc6 5.e3 e6 6.Nc3 Nf6 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0.

4.Nf3 Nc6 5.e3 Nf6 6.Bc3 Ra8 7.Bb5 Bd7 8.Bf6 gf6 9.Nc3 Rg8.

4.Nf3 Bd7 A) 5.Nc3 Nf6 (5...Nc6 6.e4 de4 7.Ne4 Nf6 8.Bd3 Ne4 9.Be4 f5) 6.e3 Nc6 7.Nb5 e5 8.a4 e4 9.Ne5 Bb4; B) 5.e3 Nc6 (5...e6 6.c4 Nf6 7.cd5 Ba4 8.Qc1 ed5 9.Bc3 Ra8; 5...h5 6.Nc3 Nf6 7.Be2 Nc6 8.0–0 g6 9.Nb5 Bg7; 5...Nf6 6.Bc3 Ra7 7.Bd4 Ra5 8.Bc3 Ra7 9.Bd4 Ra5; 5...h6 6.Nc3 Nc6 7.Be2 Nf6 8.0–0 e6 9.Nb5 Be7; 5...Nh6 6.Nc3 Nc6 7.Bd3 e5 8.e4 de4 9.Be4 Bc5) 6.c4 Nf6 7.Nc3 e6 8.Qb3 Be7 9.cd5 ed5.

4.Nf3 Nf6 A) 5.h3 Nc6 (5...g6 6.e3 Bg7 7.Nc3 0–0 8.Bd3 Nbd7 9.0–0 Nc5; 5...Bf5 6.Nd4 Bd7 7.Nb3 Ra8 8.Bf6 ef6 9.Nc3 Be6) 6.e3 g6 7.Nc3 Bg7 8.Bd3 e5 9.Bb5 0–0; B) 5.e3 Nc6 (5...g6 6.c4 Nc6 7.cd5 Rd5 8.Bf6 ef6 9.Nc3 Rh5; 5...e6 6.Nc3 Nc6 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0) 6.Bc3 Ra7 7.Bb5 Bd7 8.Bf6 gf6 9.Nc3 Rg8; C) 5.Bc3 Ra8 (5...Ra4 6.e3 Nc6 7.Bb5 Rg4 8.0–0 Bd7 9.h3 Rg6) 6.e3 e6 7.Bb2 Nc6 8.Nc3 Bd7 9.Be2 Bc5; D) 5.a4 g6 (5...Nc6 6.Nc3 g6 7.e4 d4 8.Nb5 Bg7 9.Nbd4 Nd4) 6.e3 Nc6 7.Bd3 Bg7 8.0–0 0–0 9.Nc3 e5.

4.f4 Nf6 5.Bc3 Ra8 6.Nf3 c5 (6...Bf5 7.Nd4 Bg4 8.h3+=) 7.d4 (7.e3!?=) 7...c4+= 8.Nbd2 Bg4 9.e3 Ne4 (9...e6 10.Be2+=) 10.Ne4 de4 11.h3 ef3 (11...Bh5 12.Qb1 A) 12...Bf3 A1) worse is 13.gf3 Qd5+= (worse is 13...ef3 14.Qb7 Ra3 15.Kd2+–); A2) 13.Qb7 Ra3 14.Bb2 Re3 15.Kf2 Bg2 16.Bg2 Rf3 17.Bf3 ef3 18.d5+–; B) 12...ef3 13.Qb5 Qd7 14.Qh5 fg2 15.Bg2 e6+=) 12.hg4+/– Ra3 13.Bb4 (better is 13.Qd2+=) 13...Re3+= 14.Kf2 Re6 (14...Re4 15.c3 fg2 16.Bg2 Rf4 17.Ke3–/+) 15.Kf3 (better is 15.gf3!? Qc7 16.d5=) 15...Qd5–/+ 16.Kf2 Nc6 17.Bc3 g6 (17...Re4 18.g3 Rd4 19.Bd4 Qh1+= (19...Nd4? 20.Rh5 Qe4 21.c3+–)) 18.Be2 (18.Qf3 Qf3 19.gf3 Bg7+=) 18...Bg7= d4 becomes the focus of attention 19.Bf3 Qd8 20.d5 Bc3 21.de6 Qb6 22.Kg3 Ba1 23.Qd7 Kf8 24.Bc6?? The backward pawn on b7 becomes a target (24.Ra1 Nd4+=) 24...Qe3?? (better is 24...bc6 25.Ra1 Qe3 26.Kh2 Qf4 27.Kg1 A) 27...Qg4? 28.Rf1 Kg7 29.Rf7 Kh6 30.Rf3+– (30.Re7?! Qg5+/–); B) 27...Qe3 28.Kf1 Qe4+=) 25.Bf3+= Bf6 (25...Bd4 A) 26.Qb7? g5 (26...Qe6?! 27.Qe4 Qf6 28.g5=) 27.Kh3 h5–+ (27...gf4?! 28.ef7 Kg7 29.Qe4=); B) 26.ef7 Kg7 27.Rd1+=) 26.ef7 Kf7 27.Qb7 h5 (27...g5 28.fg5 Bg5 29.Qd5 Kg7 30.Qc4+/–) 28.Qd5 (28.gh5 gh5 29.Qd5 e6 30.Qd7 Be7+=) 28...Kg7 (28...e6 29.Qd7 Be7 30.gh5 Rh5=) 29.gh5+– g5 30.Qf5 (30.Qe4 gf4 31.Kg4 Qe4 32.Be4 Be5+–) 30...gf4+/– 31.Kh2 (31.Qf4?? Be5 32.Qe5 Qe5 33.Kf2 Rd8–+) 31...Rh5?? (better is 31...Rg8+/–) 32.Qh5+– Qf2 (32...Qe5 33.Qh3+–) 33.Qg4 Kf8 34.Rb1 Bh4 (34...Qh4 35.Qh4 Bh4+–) 35.Rb8 Kf7 36.Qg8 Kf6 37.Rf8 Ke5 38.Qd5 1–0. dixi82 – willow27, ChessWorld.net, 2006.

4.e3 Nc6

5.Na3 Nf6 (5...Bd7 6.Nf3 Nf6 7.Nb5 e5 8.a4 e4 9.Ne5 Bb4; 5...Bf5 6.Nb5 Nf6 7.Nf3 Ne4 8.Nfd4 Nd4 9.Nd4 Bd7; 5...e5 6.Nb5 Bd7 7.a3 Nf6 8.Bc3 Ra6 9.Nf3 e4; 5...e6 6.Nb5 Nf6 7.Nf3 Be7 8.Bc3 Ra4 9.Bd3 0–0; 5...h5 6.Nf3 Nf6 7.Nb5 h4 8.h3 Ne4 9.Be2 e6; 5...Nb4 6.Nf3 Nf6 7.Nb5 Bf5 8.Nbd4 Bd7 9.Be2 e6) 6.Nf3 g6 7.Nb5 Bg7 8.Bc3 Ra6 9.Bd3 0–0.

5.a4 Nf6 (5...e6 6.Nf3 Nf6 7.Nc3 Bc5 8.Be2 0–0 9.0–0 Bd7) 6.Nf3 g6 7.c4 Bg7 8.cd5 Rd5 9.Nc3 Ra5.

5.Bc3 Ra8 6.Nf3 Nf6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7.

5.Nc3 Nf6 (5...e5 6.Nb5 Bd7 7.a3 Nf6 8.Bc3 Ra6 9.Nf3 e4) 6.Nf3 g6 7.d4 Bg7 8.Bd3 0–0 9.0–0 Nb4.

5.Nf3 Bd7 6.c4 dc4 7.Bc4 b5 8.Be2 Nf6 9.d4 Qa8.

5.Nf3 e6 6.Nc3 Nf6 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0.

5.Nf3 Nf6 6.Bd3 g6 7.Nc3 Bg7 8.0–0 0–0 9.Nb5 Bf5.

5.Nf3 Bg4 6.Be2 e6 7.0–0 Bd6?? (7...Nf6 8.Nc3=) 8.a3?? (better is 8.Bg7 Bf3 9.Bf3+–) 8...Nf6+= 9.d4 0–0 10.Nbd2 Ne4 11.c4 Nd2 12.Nd2 Be2 13.Qe2 Ra4 14.c5 Be7 15.Bc3 e5 16.Qb5 Qa8 17.Rfb1 ed4–/+ 18.Bd4 Nd4 19.ed4 Ra3 20.Ra3+= Qa3 21.Qb7 Qd3 22.Nf3 Bf6 23.Qb3 Qf5 24.Re1 Qg4 25.h3 Qg6? 26.Qd5+– Rd8?? 27.Qc6 h6+– 28.Qc7 Qd3 29.c6 Qc3 30.Qb7 Rd4 31.Re8 Kh7 32.Nd4 Bd4?? 33.c7+– Qc1 34.Kh2 Bf2 35.Qe4 g6= 36.c8Q?? Qg1 0–1. ejdrzej (1765) – sting73 (1640), kurnik, 2011.

5.h3 Qd6 (5...Nf6 6.Nf3 Bf5 7.Bd3 e6 8.Nc3 Bc5 9.0–0 0–0; 5...Bf5 6.Nf3 Nf6 7.Bd3 e6 8.Bf5 ef5 9.0–0 Be7; 5...Bd7 6.Nf3 Nf6 7.Bd3 e6 8.0–0 Bc5 9.Nc3 0–0; 5...e5 6.Nf3 e4 7.Nd4 Nf6 8.Nc6 bc6 9.Bc3 Ra8) 6.Nf3 Nf6 7.a4 Qd8 8.Nc3 e6 9.Nb5 Bb4.

4.e3 Bf5

5.Nc3 Nc6 6.Nf3 Nf6 7.Bb5 Bd7 8.0–0 e6 9.Qe2 Bc5.

5.Nf3 Nc6 6.Nc3 d4 7.ed4 Nd4 8.Nd4 Qd4 9.Be2 Qb6.

5.Nf3 Nd7 6.Nd4 Bg6 7.Nc3 Ngf6 8.Be2 e5 9.Nb3 Ra8.

5.Nf3 e6 6.d3 (6.Be2 Nf6=) 6...c6 (6...Nf6 7.Be2=) 7.Be2 Ne7 8.0–0 Nd7 9.Nbd2 Nf6 10.c4 h5 (10...b6 11.cd5 cd5 12.Nb3+=) 11.cd5 Nfd5? (better is 11...cd5!? 12.Qb3 Qa8+=) 12.Nc4 (12.e4 Nf4 13.ef5 Nf5+–) 12...Ra8 (better is 12...Rb5 13.Nd4 Rb2 14.Nb2 Bg6+–) 13.Qb3?? (better is 13.e4+–) 13...b5+= 14.Ncd2 Nf6 15.e4 Bg6 (15...Bg4 16.a4+=) 16.Ne5 (16.a4 ba4 17.Ra4 Ra4 18.Qa4 h4+/–) 16...Ng4 17.Ng4 hg4 18.Bg4 Rc8 (18...Qa5 19.Qc2+/–) 19.Rac1 (19.a4 ba4 20.Ra4 Qd6+/–) 19...Ng8 20.Nf3 Bh5 21.Bh5 Rh5 22.h3 Bd6 (22...Nf6 23.Ne5 Qb6 24.a4+–) 23.Bg7+– Qc7 (23...Bf4 24.Rc3+–) 24.d4 Bf4 (24...Ra8 25.Be5+–) 25.Rc2 (25.Be5 Be5 26.Ne5 Ne7+–) 25...Bh6 (25...Qd7 26.Be5 Be5 27.de5+– (27.Ne5?! Qd4 28.Rc6 Rc6 29.Nc6 Qe4+/–)) 26.Be5 Qd7 27.Rfc1?? (27.g4 Rh3 28.Kg2 Rf3 29.Qf3 b4+–) 27...Ne7? (27...Bc1 28.Rc1 f6 29.Bf4+=) 28.Bf6?? (better is 28.Rd1+–) 28...Bc1 29.Ne5?? (better is 29.Rc1 Ng8 30.Be5+=) 29...Qd4–+ 30.Rc1 Qd6?? (better is 30...Re5!? 31.Qa3 c5–+) 31.Be7 (31.Rd1 Qb8 32.Rd7 Ng6 33.Ng6 Kd7 34.Qd1 Rd5 35.ed5 fg6 36.dc6 Kc6 37.Qf3 Kd7 38.Qd3 Kc6+=) 31...Qe7?? (31...Qe5!? 32.Ba3 Qe4–/+) 32.Nf3 (32.Qb5 cb5 33.Rc8 Qd8 34.Rd8 Kd8 35.f4= (worse is 35.Nf7 Ke7 36.g4 Rh3–/+)) 32...Rc5 33.Rc5 Qc5 34.Qd1 Rd8 35.Qe1 (better is 35.Qa1!?–/+) 35...Qc2–+ 36.a3?? (better is 36.Qe3–+) 36...Rd1 37.Kh2 (37.e5 c5 38.g4 Re1 39.Ne1 Qc3–+) 37...Re1 38.Ne1 Qe4 39.Nf3 Qa4 40.g3 Qa3 41.Ng5 (41.Kg2 b4 42.h4 Qd3–+) 41...b4 0–1. Fournier,Frederic (1920) – coelophisys (1810), Active ajedrez21.com, 2004.

5.Nf3 Nf6 6.Bd3 (6.Bf6 gf6 7.Nd4 Bg6 8.Nc3 e5 9.Nb3 Ra8) 6...Bd3 7.cd3 e6 (7...Nbd7 8.Bf6 ef6 9.0–0 Bd6) 8.0–0 (8.Qb3 Nbd7 9.Qb7 Bd6) 8...Bd6 9.Nc3 Nc6 (9...Nbd7+=) 10.e4 0–0 11.ed5 ed5 12.Ne2 d4 13.Ned4 Nb8 14.Bc3 Rd5 15.a4 Re8 16.Rb1 Qc8 17.Nb5 Bc5 18.d4 Be7 19.Re1 (better is 19.Na7 Qd8 20.Rb7+/–) 19...Kh8?? (19...c6 20.Na7 Qd7 21.a5=) 20.Ne5 (20.Na7 Qd8 21.Rb7+–) 20...g6? (better is 20...c6!? 21.Na7 Qc7+=) 21.Nf7 Kg8? (21...Kg7 22.Ne5 c6 23.Na7+/–) 22.Ne5 (22.Na7 Qd7 23.Ne5 Qd8 24.Rb7 Bd6+–) 22...Kh8? (better is 22...c6 23.Na7 Qc7+–) 23.Ng6 (better is 23.Na7 Qf5 24.Rb7+–) 23...hg6= 24.Qf3 Nc6 (better is 24...Qd7+=) 25.Qd5?? (better is 25.Re7 Re7 26.Qf6 Rg7 27.Re1+=) 25...Nd5–+ 26.Na3 (26.f3 Qd7–+) 26...Nc3 (better is 26...Ba3!? 27.Re3–+) 27.dc3 Nd4 (better is 27...Ba3 28.h3–+) 28.cd4 Kh7 (better is 28...Ba3 29.Rf1 Re4–+) 29.Nc4 c6 (29...Qd7!? 30.Ne3 b6 31.Rbc1–+) 30.Ne5 Qc7 31.Re3 Kh6 (better is 31...Ra8!? 32.Ra1–+) 32.Rh3 Kg7 33.Rg3 g5 34.Re1? (34.Rgb3 Qa5 35.Rb7 Qa4 36.Rd7–+) 34...Kh6 (better is 34...Ra8–+) 35.Nf7?? (35.Rh3 Kg7 36.Rg3 Qa5–+) 35...Kh5?? (35...Kg6 36.Ng5 Qb8 37.Ne4 Kf5 38.Rf3 Kg6 39.Rg3 Kh6 40.Rh3 Kg7 41.Rg3 Kf8 42.Rf3 Kg8 43.Rg3 Kf7 44.Rf3 Kg6 45.Rg3=) 36.Rh3 (better is 36.Re6 Bf6 37.Rh3 Kg6 38.Ne5 Qe5 39.Re5 (39.de5? Re6 40.f4 Bd8–+) 39...Be5 40.de5 Re5 41.Kf1+=) 36...Kg4?? (better is 36...Kg6 37.Ne5 Kf6 38.Rf3 Ke6 39.Ng6 Kd7+=) 37.Re4 (37.Nh6 Kf4 38.Rf3) 37...Kf5–+ 38.Ree3? (38.Rhe3 Kg6 39.Ne5 Kg7 40.Nf3–+) 38...Kg4 (better is 38...Kg6 39.Ne5 Kg7–+) 39.Nh6 Kf4 40.Rhf3 1–0. AArow – Duffer, ICS game chess.net, 1998.

3.Bb2 e5

4.Bc3 Rc5= 5.Bb4 Rb5 6.Bf8 Kf8 7.Nf3 Nf6 8.Nc3 Ra5 =.

4.e3 Bb4 5.a3 Be7 6.d4 Nc6 7.d5 Na7 8.Bc3 Ra4 9.Be5 Nf6 10.d6 Bd6 11.Bd6 cd6 12.Qd6 Nc6 13.Bd3 Ne4 14.Be4 Re4 15.Nf3 Qe7 16.Qe7 Re7 17.0–0 0–0 18.Nc3 d6 19.Rfd1 Rd8 20.Nd5 Re4 21.Nd4 Nd4 22.ed4 Re2 23.Ne3 Re8 24.Kf1 R8e3 25.fe3 Re3 26.Re1 Re1 27.Re1 Bg4 28.Re8 1–0. Bonetti,Shane – LendaFan, ICC, 2002.

4.e3 Nc6 5.Nf3 Ra8 (better is 5...e4!? 6.Nd4 Nf6+=) 6.Ne5+= d6 7.Nc6 bc6 8.Bc4 Nf6 9.Qf3 Be7 (9...d5 10.Bf6 gf6 11.Bd3+/–) 10.Qc6 Bd7 11.Qf3 0–0 12.0–0 Be6 13.Bb3 Rb8 14.Nc3 Bb3 (better is 14...d5!?+/–) 15.ab3+– h6 16.Qg3 Nh7 17.Ne4 Bh4?? (17...Nf6+–) 18.Qg7 1–0. lidl4 – 09phypeach, Live Game Caissa's Web, 2004.

4.e4 d5 5.Bc3 Ra8= 6.Qh5 de4 7.Qe5 Qe7 8.Bc4 c6 =.

4.e4 d5 5.Nc3 c6 (5...d4 6.Nce2–/+ Nf6 7.Ng3 Be7 8.Nf3 0–0+=) 6.Nf3 (6.ed5 cd5 A) 7.Nf3 Nc6+= (7...d4 8.Nb5 Bd7=) 8.Nb5 Bg4+=; B) 7.Bb5 Nc6 8.Qe2 Nge7=) 6...Bd6 (6...d4 7.Ne2+= Nf6 8.Ng3 h5+=) 7.d3 (7.ed5!? cd5 8.Nb5= Nc6=) 7...Nf6 (7...d4 8.Nb1 Qb6–/+) 8.ed5 cd5 9.Qe2 (9.d4 e4 10.Nd2 0–0+=) 9...Nc6 10.h3 (10.Nb1 0–0–/+) 10...0–0–+ 11.g4 Re8 12.Bg2? (better is 12.Qd2–+) 12...e4 13.de4 Ne4 (13...de4?! 14.Nd2 Nd4 15.Qd1–/+) 14.0–0 (14.Nd1 Ng3! 15.fg3 Bg3 (worse is 15...Re2 16.Ke2 Bg3 17.Ne3–+) 16.Kf1 Re2 17.Ke2 Qe7 18.Kf1 b6–+) 14...Nc3 15.Bc3 (15.Qd3 Ne2 16.Kh1–+) 15...Re2 16.Ba5 Qa5 17.a3 (17.Rfe1 Re1 18.Ne1 Qd2–+) 17...Ne5 (17...Rc2!? 18.a4–+) 18.Ne5 (18.Nd4 Re4 19.Be4 de4–+) 18...Be5 19.Rad1 Be6 20.a4 (20.c4 dc4 21.a4 Bc7–+) 20...g6 (20...Qa4 21.Rfe1 Qc2 22.Re2 Qe2 23.Rf1–+) 21.f4 (21.c4 Qa4 22.Bd5 Bd5 23.Rd5 Qc4 24.Re5 Re5–+) 21...Qc5 22.Kh1 Bc7 23.f5 Qd6 0–1. dennism (2100) – kode (2345), net–chess.com, 2008.

4.e4 d5 5.ed5 Rd5 6.Nc3 (6.Bc4 Rc5 (6...Nc6 7.Bd5 Qd5 8.Nf3 Qb5 9.Qc1 Nf6 10.a4 Qa5) 7.Na3 Nc6 8.Nf3 Nf6 9.Qe2 Be7 10.d3 0–0) 6...Ra5 (6...Rc5 7.Nf3 Nf6 8.Bb5 Bd7 9.Qe2 Be7 10.a4 0–0; 6...Rd7 7.Nf3 Nc6 8.Bc4 Nf6 9.0–0 Bc5 10.Qe2 0–0) 7.Nf3 Nf6 8.Bb5 Nbd7 9.Qe2 c6 10.Bc4 Bd6. Bonny – kii, internet, 2006.

4.e4 d5 5.ed5 Nf6 A) 6.Nf3 Bd6 (6...Nd5 7.Ne5 Qe7 8.Qe2 Nf4 9.Qe4 Ng6 10.d4 f6; 6...e4 7.Ne5 Rd5 8.Bc4 Re5 9.Be5 Ng4 10.Bg3 Qd4) 7.Nc3 0–0 8.Bc4 c6 9.dc6 e4 10.Nd4 Nc6; B) 6.Bc4 Nd5 (6...b5 7.Bd3 Nd5 8.Nf3 Nf4 9.Be5 Nd3 10.cd3 f6; 6...c6 7.Be5 cd5 8.Qe2 Be7 9.Bd3 Nc6 10.Nf3 d4; 6...Bd6 7.Nf3 0–0 8.0–0 Nd5 9.Nc3 Nf4 10.Ne2 Qf6) 7.Nf3 Nc6 8.0–0 Bd6 9.Nc3 Nf4 10.d4 0–0; C) 6.c4 Bc5 (6...Bd6 7.Nf3 0–0 8.Be2 c6 9.Nc3 cd5 10.cd5 Nd5; 6...c6 7.Nf3 cd5 8.cd5 Nd5 9.Ne5 Nc6 10.Nc4 Rc5) 7.Nc3 0–0 8.Bd3 e4 9.Bc2 Nbd7 10.Na4 Bd6.

4.e4 Nc6

5.Nc3 A) 5...Bc5 6.Nf3 Nf6 (6...d6 7.Bc4 Nf6 8.0–0 0–0 9.h3 h6 10.a4 Bd7; 6...h6 7.Bc4 Nf6 8.0–0 0–0 9.Qe2 d6 10.Nd5 Nd5) 7.Bc4 0–0 8.0–0 d6 9.h3 h6 10.a4 Bd7; B) 5...h6 B1) 6.Bc4 Bc5 (6...Nf6 7.Nf3 Bc5 8.0–0 0–0 9.Qe2 d6 10.Nd5 Nd5) 7.Nf3 Nf6 8.0–0 0–0 9.Qe2 d6 10.Nd5 Nd5; B2) 6.Bb5 Nf6 (6...Bc5 7.Nf3 Nf6 8.0–0 0–0 9.h3 Nd4 10.Bc4 Re8; 6...Nd4 7.Bd3 Qg5 8.g3 Nf6 9.Nf3 Nf3 10.Qf3 c6; 6...Bb4 7.a4 Nf6 8.Nf3 0–0 9.0–0 Bc5 10.Ne5 Ne5) 7.Nf3 Bc5 8.0–0 0–0 9.Bc6 dc6 10.Ne5 Bd4; B3) 6.Nf3 Nf6 (6...Bc5 7.Bc4 Nf6 8.0–0 0–0 9.Qe2 d6 10.Nd5 Nd5) 7.Bc4 Bc5 8.Qe2 d6 9.Nd5 0–0 10.0–0 Nd5; C) 5...Nf6 6.Nf3 (6.Bd3 Bc5 7.Nf3 d6 8.0–0 0–0 9.Nd5 Bd7 10.Qe2 Nd5) 6...Bc5 7.Bc4 0–0 8.0–0 d6 9.h3 h6 10.a4 Bd7.

5.Bd3 A) 5...Nf6 A1) 6.Nc3 Bc5 (6...Bb4 7.a3 Bc5 8.Nf3 0–0 9.0–0 d6 10.Nd5 h6) 7.Nf3 0–0 8.0–0 d6 9.Nd5 Bd7 10.a3 Nd5; A2) 6.Nf3 Bc5 7.Ne5 Bf2 8.Kf2 Ne5 9.Be5 Re5 10.Nc3 d5; B) 5...Bb4 B1) 6.a3 Bc5 (6...Be7 7.Nf3 Nf6 8.0–0 0–0 9.Bc3 Ra4 10.Be5 Ne5) 7.Nf3 Nf6 8.Nc3 0–0 9.0–0 d6 10.Nd5 Be6; B2) 6.Nc3 Nf6 (6...d6 7.Nf3 Nf6 8.0–0 0–0 9.a3 Bc5 10.Nd5 Be6; 6...Bc5 7.Nf3 Nf6 8.0–0 0–0 9.Nd5 d6 10.a3 Be6; 6...Nge7 7.Nf3 0–0 8.0–0 d5 9.a3 Bc5 10.ed5 Nd5; 6...h6 7.Nf3 Nf6 8.0–0 d6 9.Qe2 Be6 10.Bc4 0–0) 7.Nf3 0–0 8.a3 Bc5 9.0–0 d6 10.Nd5 Be6; B3) 6.Qe2 Nf6 (6...d6 7.Nf3 Nf6 8.Nc3 Bg4 9.Nd5 Nd5 10.ed5 Rd5; 6...Nge7 7.Nf3 Ng6 8.g3 d6 9.a3 Bc5 10.Nc3 Bh3; 6...Bc5 7.Nf3 d6 8.Nc3 Nf6 9.0–0 Nb4 10.Bb5 Bd7; 6...h5 7.Nf3 Nf6 8.Nc3 d6 9.h3 0–0 10.0–0 Be6) 7.Nf3 0–0 8.Nc3 d6 9.0–0 Be6 10.Bc4 h6; B4) 6.Nf3 Nf6 (6...d6 7.Nc3 Nf6 8.0–0 0–0 9.a3 Bc5 10.Nd5 Be6) 7.0–0 d6 8.Nc3 0–0 9.a3 Bc5 10.Nd5 Be6; C) 5...Qg5 C1) 6.g3 Qh6 (6...Nf6 7.Nf3 Qg4 8.Nc3 Bc5 9.0–0 0–0 10.Qe2 d6; 6...Bc5 7.Nf3 Qe7 8.Nc3 Nf6 9.0–0 d6 10.Nd5 Nd5) 7.Nf3 Nf6 8.Nc3 Bc5 9.0–0 0–0 10.Nd5 d6; C2) 6.Nf3 Qg2 7.Rg1 Qh3 8.Nc3 Nf6 9.Nb5 d6 10.Qe2 Kd8; D) 5...Bc5 D1) 6.Nc3 Nf6 (6...d6 7.Nf3 Nf6 8.Nd5 Nd5 9.ed5 Nb4 10.Bc3 Nd3) 7.Nf3 0–0 8.0–0 d6 9.Nd5 g6 10.Bc3 Ra4; D2) 6.Nf3 Nf6 (6...d6 7.Nc3 Nf6 8.0–0 0–0 9.Nd5 Re8 10.Bc3 Ra4) 7.Nc3 0–0 8.0–0 d6 9.Nd5 Bd7 10.Bc3 Ra4.

5.Nf3 Bc5 6.Ne5 Nf6 7.Nc6 dc6 8.d4 Bb6 9.f3 0–0 10.c4 Re8.

5.Nf3 Nf6

6.Nc3 Bc5+= 7.Bc4 0–0 8.0–0 d6 9.h3 Bd7 10.Re1 h6.

6.Nc3 Bc5 7.Ne5 Ne5 8.d4 Bd6 +=.

6.Nc3 d5 7.ed5 Nd5 8.Bc4 Nb6 9.Bd3 f5 10.Bb5 Bd6.

6.d3 Bb4 7.Nbd2+= Qe7 8.Be2 0–0 9.0–0 d5 10.c3 Ba3.

6.d3 d5 7.Nbd2 Bd6 8.Be2 0–0 9.0–0 Re8 10.a4 Qe7.

6.d3 d6 7.Be2 (7.Nbd2 Be6 8.d4 ed4 9.Nd4 Nd4 10.Bd4 Be7) 7...Be7 8.Nbd2 (8.0–0 0–0 9.Qd2 h6 10.c4 Bg4) 8...0–0 9.0–0 h6 (9...Be6 10.Ng5 Ba2) 10.c3 (10.d4 ed4 11.Nd4 Nd4 12.Bd4 Be6=) 10...d5+= 11.Nb3 Ra8 12.ed5 Nd5 (better is 12...Qd5!? 13.c4 Qd6+=) 13.c4+= Nf4 14.Ne5 Ne5 15.Be5 Ne2 (15...Bd6 16.Bf4 Bf4 17.Bf3+=) 16.Qe2 Bf5 (16...Bb4 17.d4+=) 17.d4+/– Re8 (17...Qd7!?+/–) 18.Qf3+– Bg6 19.Rad1 (better is 19.Qb7!? Bd6 20.Rfe1+–) 19...Ra2+= 20.Qg3 (20.Qb7 Bc2 21.Nc1 Ra4+=) 20...Ra3 (20...Bh4 21.Qg4=) 21.Bc7 (21.Ra1!? Ra1 22.Ra1=) 21...Qc8+= 22.c5? (better is 22.Ra1 Rb3 23.Qb3 Qc7 24.Rfe1+=) 22...Bc2–+ 23.Be5 (23.Rde1 A) 23...Bb3?! 24.Be5 Bg5 25.f4 Re5 26.fe5+= (worse is 26.Re5 Bf6–/+); B) 23...Rb3 24.Qe5 Kf8–+) 23...f6 24.Bd6 (24.Rd2 Rb3 25.Rc2 Rg3 26.Bg3–+) 24...Rb3 (worse is 24...Bb3 25.Be7 Bd1 26.Qa3+/–) 25.Qh3 (25.f3 Bd1 26.Be7 Re7 27.Rd1–+) 25...Rh3 (25...Rh3 26.gh3 Bd6–+) 0–1. macedon (2065) – kode (2345), net–chess.com, 2008.

6.d3 Be7 7.Nbd2 d5 8.Be2 0–0 9.0–0 Ba3 10.Ba3 Ra3.

6.Bd3 Bb4 7.a3 Bc5 8.0–0 0–0 9.Ne5 Ne5 10.Be5 Bf2.

6.Bd3 Bc5 7.Nc3 0–0 8.0–0 d6 9.Nd5 Bd7 10.c3 Nd5.

3.Bb2 e6

4.e3 f5 5.Be2 Nf6 6.Bh5 Nh5 7.Qh5 g6 8.Qh3 e5 9.Nf3 d6 10.g3 Bg7 11.Nc3 0–0 12.0–0 e4 13.Nd4 Bd4 14.ed4 f4 15.Qg2 f3 16.Qh1 d5 17.d3 Bh3 18.de4 Bg2 19.ed5 Bh1 20.Kh1 Qd7 21.Rae1 Qh3 22.Rg1 Nd7 23.d6 Rh5 24.Re3 Qh2 0–1. sunnyda – odcd, kurnik, 2012

4.e3 Nf6 5.Nf3 b6 6.Be2 Bb7 7.0–0 Be7 8.c4 Nc6 9.Nc3 0–0 10.d4 Qa8 11.Qc2 Bb4 (11...Nb4 12.Qb1=) 12.a3 Be7 13.Nb5 Bd8 (13...Na7 14.a4=) 14.Bd3 (14.Bc3 Ra4+=) 14...Ne7 (14...Na7 15.Bc3 Ra6 16.d5 Nb5 17.cb5 Ra3 18.Ra3 Qa3 19.de6 fe6 20.Bf6 Bf6 21.Bh7 Kh8 22.Be4=) 15.Be2 (15.d5 Ng6 16.Bc3 Ra6+=) 15...Ng6 (15...Nf5 16.d5=) 16.Bc3 (16.d5 ed5 17.Bc3 Ra4+=) 16...Ra4= 17.Bb4 White intends c5 17...d6 18.Bd1? (better is 18.Nc3 Ra7 19.c5 bc5 20.dc5 Bf3 21.Bf3+=) 18...Re8?? (better is 18...Rb4 19.Ra2 Rb5 20.cb5 Be7–+) 19.Qa4+– Bf3 20.Qa8 (better is 20.gf3 Qb8 21.Qa7 Qa7 22.Na7+–) 20...Ba8 21.c5 (21.Bc2 Bc6+–) 21...bc5 22.dc5 Bc6 (22...dc5 23.Bc5 Ne4 24.Rc1 Nc5 25.Rc5+–) 23.Nd4 dc5 24.Bc5 Bd5 (24...Bd7 25.Bc2+–) 25.Ba4 c6 26.Bc6 Bc6 27.Nc6 Bc7 28.Rfd1 Nd5 29.a4 Ra8 30.a5 h6 (30...Ra6 31.Nb4 Nb4 32.Bb4+–) 31.a6 Kh7 (31...Ne5 32.Ne5 Be5 33.Bd4 Bd4 34.Rd4+–) 32.a7 (32.f4 Nf8+–) 32...Nf6 (32...Ne5 33.Ne7 Nc3 34.Rd2+–) 33.Rdb1 (33.Bd6 Bb6+–) 33...Ne4 34.Bd4 Nd2 (34...e5 35.Bb6 Bd6 36.Rd1+–) 35.Rb7 Bd6 36.Rf7 Nb3 (36...e5 37.Rd7 ed4 38.Rd6+–) 37.Rb1 (better is 37.Rg7 Kh8 38.Rg6 Nd4 39.ed4+–) 37...Nd4 38.ed4 e5 (38...Ne7 39.Re7 Be7 40.Rb8 Ra7 41.Na7+–) 39.de5 (better is 39.Rbb7 h5 40.Rg7 Kh6 41.Rh7 Kg5+–) 39...Ne5 40.Ne5 Be5 41.Rfb7 (41.Rb6 Bd4 42.Ra6 Bc3+–) 41...Bf4 (41...Bd4+–) 42.g3 Be5 43.f4 (43.Rd7 Kg6+–) 43...Bd6 (43...Bd4 44.Kg2 Ra7 45.Ra7 Ba7 46.f5+–) 44.Kf2 (better is 44.R1b5+–) 44...Bc5 45.Kf3 Ba7 (45...Ra7 46.Ra7 Ba7+–) 46.Ra1 Kg6 47.Raa7 Rg8 1–0. Fournier,Frederic (2020) – misterfreeze (1890), Active, 2004.

4.Nf3 c5 5.e3 f6 6.Nc3 h5 (6...d5 7.Be2=) 7.Bd3 d5 8.Nh4 Ne7 9.a4 (9.0–0 Kf7+=) 9...c4 10.Be2 d4 (10...Rh6!?=) 11.Nb5+/– d3? (better is 11...g5!? 12.Bh5 Kd7+–) 12.Bh5 Kd7 13.cd3 cd3 (13...Rh6 14.dc4 g6 15.Ra3+–) 14.0–0 (14.Ra3 Nd5 15.Rd3 Na6+–) 14...Nf5? (better is 14...Nd5+–) 15.Nf5 ef5 16.Qb3 Nc6 (16...Rh5 17.Qf7 Qe7 18.Qh5 Kd8+–) 17.Qd5 Ke7 (17...Bd6 18.Qd6) 18.Qf7 1–0. Fritz 11 – harrierhawk, internet, 2014.

3.Bb2 Nf6

4.Nc3 Nc6 A) 5.Nf3 A1) 5...d5 6.e3 (6.a4 g6 7.e4 d4 8.Nb5 Bg7 9.Nbd4 Nd4 10.Bd4; 6.d4 Bf5 7.e3 e6 8.Bb5 Bd6 9.0–0 0–0 10.Bc6) 6...g6 7.Bb5 Bh6 8.0–0 0–0 9.h3 Be6 10.a4; A2) 5...e5 6.e4 (6.e3 e4 7.Nd4 Nd4 8.ed4 d5 9.Be2 c6 10.0–0) 6...Bc5 7.Bc4 d6 8.0–0 0–0 9.a4 Nd4 10.Nd4; A3) 5...g6 6.Ne4 (6.a4 Bg7 7.e3 d6 8.Bb5 0–0 9.0–0 Nb4 10.Nd4; 6.e3 Bg7 7.a4 0–0 8.Bb5 d6 9.0–0 Bd7 10.Ba3; 6.d4 Bg7 7.e3 0–0 8.Be2 d6 9.0–0 Bf5 10.Qd2; 6.h3 Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Qd6 10.a4; 6.Rb1 Bg7 7.e4 0–0 8.Bc4 e6 9.0–0 d5 10.ed5) 6...Bg7 7.Nf6 Bf6 8.Bf6 ef6 9.e3 0–0 10.Bd3; B) 5.e4 B1) 5...g6 6.Rb1 (6.Nf3 Bg7 7.Bd3 0–0 8.0–0 d6 9.Rb1 Be6 10.Qe2; 6.Bd3 Bg7 7.Nf3 0–0 8.0–0 d5 9.Nd5 Nd5 10.Bg7) 6...Bg7 7.Nf3 0–0 8.Bc4 e6 9.0–0 d5 10.ed5; B2) 5...d5 6.ed5 Nd5 7.Nf3 Nf4 8.Ne2 Ng6 9.Ng3 Qd5 10.c4; C) 5.e3 C1) 5...e5 6.Nb5 (6.Be2 Be7 7.Nb5 0–0 8.Nf3 d6 9.0–0 Bf5 10.a4; 6.Nf3 e4 7.Nd4 Nd4 8.ed4 d5 9.Be2 c6 10.0–0; 6.Bb5 d5 7.Nf3 Bd6 8.d4 Bg4 9.Bc6 bc6 10.h3) 6...d6 7.Nf3 Be7 8.Be2 0–0 9.0–0 Bf5 10.a4; C2) 5...d5 6.Nf3 (6.Nb5 Ne4 7.Nf3 f6 8.Bd3 e5 9.0–0 Kf7 10.Nh4; 6.Bb5 e5 7.Nf3 Bd6 8.d4 Bg4 9.h3 Bf3 10.Qf3; 6.d4 Qd6 7.a3 Ne4 8.Nge2 e5 9.Ne4 de4 10.Nc3; 6.Be2 g6 7.Nf3 Bg7 8.d4 Bf5 9.0–0 0–0 10.h3; 6.a4 e5 7.Nb5 Bb4 8.Nf3 Qe7 9.Be2 0–0 10.0–0) 6...g6 7.Bb5 Bh6 8.0–0 0–0 9.h3 Bg7 10.a4; C3) 5...g6 6.Bd3 (6.Nf3 Bg7 7.Bd3 0–0 8.0–0 d6 9.a3 e5 10.e4; 6.a4 Bg7 7.Nf3 0–0 8.Bb5 d5 9.0–0 Be6 10.Qe2; 6.Bb5 Bh6 7.Nf3 0–0 8.0–0 d5 9.h3 Qd6 10.a4; 6.f4 Bg7 7.Nf3 0–0 8.Bd3 d6 9.0–0 Bg4 10.h3; 6.Be2 Bg7 7.Nf3 0–0 8.d4 d6 9.Qd2 d5 10.h4; 6.d4 Bg7 7.Nf3 0–0 8.Be2 d6 9.Qd2 d5 10.h4; 6.h3 Bg7 7.Nf3 0–0 8.Bb5 d5 9.0–0 Bf5 10.a4; 6.Ne4 Bg7 7.Nf3 0–0 8.Nf6 Bf6 9.Bf6 ef6 10.Bd3; 6.Rb1 Bg7 7.Nf3 0–0 8.Bb5 d5 9.0–0 Qd6 10.h3) 6...Bg7 7.Nf3 0–0 8.0–0 d5 9.Nb5 Ne4 10.Bg7.

4.Nc3 d5 5.e3 A) 5...Nbd7 6.Nf3 (6.a4 e5 7.Nf3 c6 8.Ne2 Bb4 9.Ne5 Ne4 10.Nf3; 6.a3 e5 7.Nf3 c6 8.Ne2 Bd6 9.Ng3 0–0 10.Be2; 6.Qb1 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 Nc5 10.a4; 6.Be2 c6 7.Nh3 e5 8.Ng5 h6 9.Nf3 Bd6 10.0–0; 6.Nh3 c6 7.Bd3 Nc5 8.Ne2 Qc7 9.0–0 Bh3 10.gh3; 6.h3 e5 7.Nf3 c6 8.Be2 Bd6 9.0–0 0–0 10.d4; 6.g3 Ne5 7.Nf3 Nc4 8.Rb1 e5 9.Bc4 dc4 10.Qe2; 6.h4 g6 7.h5 gh5 8.Nf3 Nc5 9.d4 Nce4 10.Ne5; 6.Rb1 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 Nc5 10.d4; 6.Bd3 e5 7.Be2 Nc5 8.a4 c6 9.d4 ed4 10.Qd4; 6.Qc1 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 Nb6 10.Ne5) 6...e5 7.Be2 (7.a4 c6 8.Qc1 Bd6 9.Be2 0–0 10.0–0) 7...Be7 (7...c6 8.d4 e4 9.Nd2 Bd6 10.Nb3) 8.0–0 0–0 9.d4+= (9.a4 c6 10.h3) 9...e4 10.Nd2; B) 5...Nc6 6.Nb5 (6.Nf3 g6 7.Nb5 Bg7 8.Bc3 Ra8 9.Bd3 0–0 10.0–0) 6...g6 7.Nf3 Bg7 8.Bc3 Ra4 9.Qb1 0–0 10.Qb3; C) 5...g6 6.Bd3 (6.Nf3 Bg7 7.Nb5 Bd7 8.a4 Nc6 9.Bd3 0–0 10.0–0; 6.h3 Nc6 7.Nf3 Bg7 8.Bb5 0–0 9.0–0 Bf5 10.a4; 6.Nb5 Nc6 7.Nf3 Bg7 8.Bc3 Ra6 9.Bd3 0–0 10.0–0; 6.Rb1 Nc6 7.Nf3 Bg7 8.Bb5 0–0 9.0–0 Qd6 10.h3; 6.f4 Nc6 7.Nf3 Bg7 8.Bd3 0–0 9.0–0 Nb4 10.Be2; 6.a4 Nc6 7.Nf3 Bg7 8.Bb5 0–0 9.0–0 Bf5 10.h3; 6.Bb5 Nc6 7.Nf3 Bg7 8.Nd4 Qd6 9.a4 0–0 10.Ba3; 6.a3 Nc6 7.Nf3 Bg7 8.d4 0–0 9.Bd3 e5 10.de5; 6.Be2 Nc6 7.Nf3 Bg7 8.0–0 0–0 9.d4 Bf5 10.Ne5) 6...Bg7 7.f4 d4 8.Nce2 de3 9.de3 Nc6 10.Nf3; D) 5...d4 6.ed4 Qd4 7.Nf3 Qb6 8.Rb1 Nc6 9.Be2 e5 10.0–0; E) 5...e5 6.Nf3 Nbd7 7.Be2 (7.h4 Be7 8.Be2 0–0 9.0–0 e4 10.Nd4) 7...Be7 (7...c6 8.0–0 Bd6 9.a4 0–0 10.Ba3) 8.0–0 0–0 9.Qe1+= (9.a4 c6 10.Qc1) 9...d4 10.Nd1.

4.Nc3 e5 5.e4 (5.Nf3 Nc6 (5...e4 6.Nd4 Nc6 7.Ncb5 Be7 8.e3 0–0 9.Be2 d5 10.0–0) 6.e4 (6.e3 e4 7.Nd4 Nd4 8.ed4 c6 9.Be2 d5 10.0–0) 6...Bc5 7.Bc4 0–0 8.0–0 d6 9.d3 Be6 10.Nd5) 5...Bc5 (5...Nc6 6.Nf3 (6.Bd3 Bc5 7.Nf3 0–0 8.0–0 d6 9.Nd5 Re8 10.c4) 6...Bc5 7.Ne5 (7.Bc4 0–0 8.0–0 d6 9.d3 Be6 10.Nd5) 7...Ne5 8.d4 Bd6 (8...Bb4 9.a3 Bd6 10.de5) 9.de5+= 9...Be5 10.Bd3; 5...c6 6.Bd3 Bc5 7.Qe2 Na6 8.Nf3 d6 9.a3 0–0 10.0–0) 6.h3 (6.Nf3 d6+= (6...Ng4 7.d4 ed4 8.Nd4 Qh4 9.Qd2 Nc6 10.Nd5) 7.Be2 (7.Bc4 0–0 8.0–0 Nc6 9.h3 Be6 10.Bb3) 7...c6 (7...Nc6 8.0–0 0–0 9.h3 Be6 10.a4) 8.0–0 0–0 9.a4+= (9.d3 Nbd7 10.Rb1) 9...Na6 10.Rb1; 6.Bc4 Nc6 7.Nf3 d6 8.0–0 0–0 9.d3 h6 10.h3; 6.Bd3 Nc6 7.Nf3 0–0 8.0–0 d6 9.Nd5 Bd7 10.Qe2; 6.Be2 Nc6 7.Nf3 0–0 8.0–0 d6 9.a4 Be6 10.Ng5) 6...c6–/+ 7.Qf3 (7.Rb1 d5 8.Bd3 d4 9.Nce2 Na6 10.f4) 7...d5 (7...0–0 8.Bc4 b5 (8...Na6 9.Bb3 d5 10.ed5) 9.Bb3–/+ b4 10.Na4) 8.ed5 (8.Bd3 0–0 9.Nge2 Na6 10.ed5) 8...cd5 9.Bb5 (9.Nd1 Nc6–/+ 10.Qb3; 9.Qe2+= Nc6 10.Nf3) 9...Nc6–/+ (9...Kf8 10.a4) 10.a4 (10.Nge2–+) 10...0–0 11.Nge2 e4 12.Qg3 (12.Qf4 Re8–/+) 12...d4 13.Nd1 (13.Na2 d3! 14.Nf4 Bd6–/+) 13...Nh5 (13...Nb4 14.0–0–+) 14.Qh2 (14.Qb3 Be6 15.Bc4 Bc4 16.Qc4 Qd7–/+) 14...Bd6 (14...Nb4 15.Qe5 d3 16.Nec3 dc2 17.Qh5 Rb5 18.ab5 Nd3 19.Kf1–+) 15.g3 Ne5 (better is 15...Bc5–+) 16.Kf1? (better is 16.Nd4 Bc5 17.f4 ef3 18.Qf2–/+) 16...Nf3–+ 17.Qg2 Nd2 18.Kg1 Be5 19.Kh2 (19.c3 Nf3 20.Kf1–+) 19...Nf3 (19...Nf3 20.Qf3 ef3 21.Bd4 Bd4 22.Nd4 Qd4–+; 19...Nf3–+) 0–1. dennism (2100) – pcmvr (2775), net–chess.com, 2008.

4.c4 g6 5.e3 Bg7 6.Nf3 0–0 7.d4 c5 8.Nc3 d5 9.Rb1 cd4 Black gets the initiative 10.Nd4 (10.Qd4 Ne4 11.Ne5 Nc6 12.Nc6 bc6 (12...Bd4 13.Nd8 Nc3 14.Rc1 Na2 15.Bd4 Nc1 16.Bb6 Nd3 17.Ke2–+) 13.Qg7 Kg7 14.Ne4 f6–+) 10...e5 11.Nb3 d4 12.Na5 Qa5 13.Qa4 (worse is 13.ed4 ed4 14.Qd4 Re8 15.Kd1 Bf5–/+) 13...Qa4 14.Na4 Bf5 15.Ra1 de3 16.f3 (worse is 16.Be5 ef2 17.Kd1 Rd8 18.Kc1 Nc6–/+) 16...Nc6 17.Be2 Nd4 18.Bd4 ed4 19.Rd1? (19.g4!? Bc2 20.Nc5+=) 19...Ra8 20.Nb2 Ra2 21.Nd3 Bd3 22.Rd3 Nd7 23.Rd1 Nc5 24.g4 (24.Kf1 d3! 25.Bd3 Nd3 26.Rd3 Ra1 27.Ke2 Rh1 28.Ke3 Rh2–+) 24...Ne6 (better is 24...d3 25.Rd3 Nd3 26.Bd3 Ra1 27.Ke2 Rh1 28.Ke3–+) 25.c5 Nc5 (better is 25...Nf4!? 26.Bc4 Ng2 27.Kf1 Rf2 28.Kg1–+) 26.Bc4 Rc2 27.Bd5 (27.Bd3 Rc3 28.Ke2–+) 27...d3 28.Rb1 (28.0–0 e2 29.Rfe1–+) 28...Bc3 29.Kf1 e2 0–1. Katsaros,Sotirios (2055) – Koukoufikis,Georgios (2140), Iraklio op 6th, 2002.

4.d3 d5 5.Nd2 Nc6 6.Ngf3 e6 7.g3 Be7 8.Bg2 0–0 9.0–0 Ng4 10.c4 Bf6 11.Qc2 Nb4 12.Qb1 Nc6 13.Qc2 dc4 14.dc4 Qe7 15.a3 (15.Nb3 Ra7=) 15...Bd7 (15...Bb2 16.Qb2 Rd8 17.Nb3+=) 16.h3= Nge5 17.Rfe1 (17.Ne5!? Ne5 18.Ne4+=) 17...Nf3+= 18.Nf3 e5 19.Nd2 Nd4 20.Bd4 ed4 21.h4 1–0. Dejna,Miroslaw – Reza,Wojciech (1810), Ferie z szachami Poland, 2009.

4.d4 d5 5.h3 Rb5 6.Qc1 g6 7.c3 Bg7 8.Nf3 Rb6 9.Nbd2 0–0 10.e3 Bf5 11.Nb3 Ne4 12.Be2 Nd7 13.0–0 Qa8 14.Nfd2 Ndf6 15.Re1 Re8 16.Bf3 Qa7 17.Ne4 Be4 18.Nd2 Bf3 19.Nf3 Qa4 20.Ne5 Ne4 21.Nf3 Ra8 22.Nd2 Nd6 23.f3 Bh6 24.Nb3 Nc4 25.Kf2 Ne3 26.Re3 Re6 (26...Be3?! 27.Qe3 Qc4 28.Qe2= (28.Qe7? Re6 29.Qc5 Re2 30.Kg3 Rb2–+)) 27.Nc5? (27.Re6 Bc1 28.Re2–+) 27...Be3 28.Qe3 (28.Kg3 Qc6 29.Qf1 Qd6 30.f4 Bf4 31.Kf3–+) 28...Qc2 (28...Re3 29.Na4 Re6 30.Nc5+=) 29.Kg3 Re3 (29...Qb2 30.Ne6 Qa1 31.Nc7=) 30.Kf4 Qf2 (better is 30...Qb2 31.Ke3 Qc3 32.Kf4 Qd4 33.Kg3 Qe5 34.f4 Qa1–+) 31.Bc1 e5! 32.de5 (32.de5 Ra4 Mate attack) 32...Ra4! 33.Na4 (33.Na4 Re4 Mate attack) 33...Re4 34.Kg5 Qh4 0–1. grahamtrue (2125) – pierred (2765), net–chess.com, 2011.

4.e3 d6 5.Nf3 (5.Bf6 ef6 6.Nf3 d5=) 5...Bg4 (5...e5 6.Bc3 Ra8 7.a4+=) 6.Be2 Nbd7 7.0–0 Qa8 8.a3 Nc5 (8...e5 9.Nc3=) 9.h3 (9.Bf6 ef6 10.d4 Ne4+=) 9...Bd7 (9...Bf3 10.Bf3 (worse is 10.gf3 Na4 11.Bf6 gf6+=) 10...e5 11.Bc3+=) 10.d4 (10.Bf6 ef6 11.d4 Ne4=) 10...Na4 11.Qc1 Nb2 12.Qb2 b6 13.c4 Ne4 (13...e6 14.Nc3=) 14.Nc3 White prepares d5 14...Nc3 15.Qc3 e6 16.Rfc1 (16.Nd2 Be7=) 16...Be7 17.e4 (17.Nd2 Bc6 18.Bf3 0–0=) 17...0–0 (17...Qe4 18.Qd2–/+) 18.d5 (18.Qd3 e5+=) 18...e5 (18...Bf6 19.Nd4–/+) 19.Nd2 (19.Bd3 Qa7+=) 19...f5 20.Bd3 f4 21.f3 (21.Be2 Qe8+=) 21...Bh4 22.Nb3 Ra7 (22...Ra3? 23.Ra3 Qa3 24.Ra1+–) 23.Qb4 Ba4 (23...Ra4 24.Qd2–/+) 24.Nd2 Bd7 25.Bc2 (25.Nb3 Ra4 26.Qd2–/+) 25...Qd8–/+ 26.a4 (better is 26.Rf1!?–/+) 26...Qg5–+ 27.Nf1 Bh3 (27...Bh3 28.Qd2 Rf6–+) 0–1. Fournier,Frederic (1910) – cozol (1905), Active, 2004.

4.Nf3 Rb5 5.Qc1 d5 6.e3 e6?? (better is 6...Ra5=) 7.Bb5+– c6 8.Be2 Qa5 9.0–0 Na6 10.d4 Nb4 11.Bc3 Qa4 12.Bb4 Qb4 13.c3 Qa4 14.Bd1 Qb5 15.a4 Qc4 16.Nbd2 Qd3 17.Qc2 Qc2 18.Bc2 Bd6 19.c4 b6 20.cd5 Nd5 21.a5 ba5 22.Ra5 0–0 23.Ra8 Nb4 24.Bb3 Ba6 25.Rf8 Kf8 26.Ra1 Bb5 27.e4 Ke7 28.e5 Bc7 29.Bc4 Nc2 30.Ra7 Kd7 31.Bb5 cb5 32.Nb3 Kc6 33.Ng5 Bb6 34.Ra6 Kb7 35.Rb6 Kb6 36.Nf7 b4 37.Kf1 Kb5 38.Ke2 Kc4 39.Na5 Kd4 40.Nc6 Kd5 41.Nfd8 b3 42.Kd2 Na3 43.Kc3 b2 44.Kb2 Nc4 45.Kc3 Ne5 46.Ne5 Ke5 47.Kd3 Kf5 48.Ke3 e5 49.Nc6 g5 50.f3 h5 51.Ne7 Ke6 52.Nc6 Kd5?? 53.Nb4+– Kc4 54.Nd3 Kd5 55.g3 Ke6 56.h3 Kf5 57.Nc5 g4 58.hg4 hg4 59.f4 ef4 60.gf4 g3 61.Nd3 Kg4 62.Ke2 Kh3 63.Kf1 Kg4 64.Kg2 Kf5 65.Ne1 Kf4= 66.Nf3 Kg4 67.Ng1 Kh4 68.Ne2 Kg4 69.Ng3 ½–½. futsalboy (1685) – goldengab, kurnik, 2011.

4.Nf3 d5 5.Bc3 Ra8 6.e3 =.

4.Nc3 e6

5.e3 A) 5...d5 6.Nf3 (6.Bd3 Nc6 7.Nf3 e5 8.e4 d4 9.Nb5 Nb4 10.Bc4; 6.h3 Nc6 7.Nf3 Bd7 8.Be2 Bb4 9.0–0 0–0 10.a3; 6.Be2 Nc6 7.Nf3 Be7 8.0–0 0–0 9.Nb5 Ne4 10.a4; 6.a4 Nc6 7.Nf3 Bd7 8.Nb5 Bc5 9.Bc3 Ra8 10.Bf6; 6.g3 Nc6 7.Nf3 Bd7 8.Be2 Be7 9.0–0 0–0 10.a4) 6...Bd7 7.Bd3 Nc6 8.0–0 Be7 9.Qe2 0–0 10.a4; B) 5...Be7 6.h3 (6.Nf3 0–0 7.Bd3 Nc6 8.0–0 d5 9.Ne2 Bd7 10.Bc3; 6.Bd3 0–0 7.Nf3 Nc6 8.0–0 d5 9.Nb5 Nb4 10.a4; 6.d4 Nc6 7.Nf3 b6 8.Bd3 Bb7 9.a3 0–0 10.0–0; 6.a4 0–0 7.Nf3 Nc6 8.Bb5 h6 9.0–0 Nb4 10.Qb1; 6.g3 Nc6 7.Nf3 0–0 8.Bb5 e5 9.d4 e4 10.Ne5; 6.Be2 Nc6 7.Nf3 0–0 8.0–0 d5 9.a4 Bd7 10.h3; 6.Bb5 Nc6 7.Nf3 0–0 8.0–0 b6 9.d4 Bb7 10.Qe2; 6.a3 Nc6 7.Nf3 0–0 8.Bb5 d5 9.0–0 Bd6 10.d4; 6.h4 0–0 7.Nf3 Nc6 8.Be2 b6 9.0–0 Bb7 10.a4; 6.Rc1 0–0 7.Bd3 Nc6 8.Nf3 d5 9.0–0 e5 10.Be2; 6.Rb1 0–0 7.Nf3 Nc6 8.Bb5 Nb4 9.a3 Nbd5 10.Nd5) 6...Nc6 7.Nf3 0–0 8.Bb5 b6 9.0–0 Bb7 10.Re1; C) 5...b6 6.Bd3 (6.Nf3 Nc6 7.Bd3 Nb4 8.Bc4 Be7 9.a3 Nc6 10.0–0; 6.f4 Nc6 7.Nf3 Bb7 8.a3 e5 9.Nb5 ef4 10.ef4; 6.Bc4 Nc6 7.Nf3 Be7 8.0–0 0–0 9.Qe2 Bb7 10.Nb5; 6.a3 Be7 7.Nf3 0–0 8.Bb5 Nc6 9.0–0 Bb7 10.Qe2; 6.h3 Nc6 7.Nf3 Bb7 8.Bb5 Bd6 9.0–0 0–0 10.d4; 6.a4 Nc6 7.Nf3 Bb7 8.Nb5 Be7 9.Be2 0–0 10.0–0; 6.Be2 Nc6 7.Nf3 Bb4 8.a3 Be7 9.0–0 0–0 10.Bd3; 6.Nb5 Nc6 7.Nf3 Bb7 8.Bc4 Be7 9.0–0 0–0 10.Qe2; 6.Nh3 Bb7 7.Nf4 Nc6 8.Bb5 Na7 9.Be2 e5 10.Nd3; 6.Bb5 Nc6 7.Nf3 Bd6 8.Bc4 0–0 9.0–0 Be7 10.Qe2) 6...Nc6 7.Nf3 Nb4 8.Bc4 d5 9.Bb5 Bd7 10.Bd7; D) 5...Bc5 6.d4 (6.Nf3 Nc6 7.d4 Be7 8.Bd3 0–0 9.0–0 b6 10.e4) 6...Bb4 7.a3 Be7 8.Nf3 Nc6 9.Bd3 0–0 10.0–0; E) 5...Na6 6.Be2 (6.Nf3 Be7 7.Be2 0–0 8.0–0 b6 9.a3 Bb7 10.d4; 6.f4 Be7 7.Nf3 0–0 8.Be2 Nc5 9.0–0 b6 10.Ne5; 6.Nge2 Be7 7.Nd4 0–0 8.Be2 Nc5 9.0–0 d5 10.Nb3; 6.d4 d5 7.Nf3 Bd6 8.Be2 0–0 9.0–0 Bd7 10.a3; 6.Nh3 Nc5 7.Be2 Be7 8.0–0 0–0 9.d4 Na4 10.Na4) 6...Be7 7.Nf3 0–0 8.0–0 b6 9.Nd4 Bb7 10.Bf3; F) 5...h5 6.Bd3 (6.Be2 Nc6 7.Nh3 Bb4 8.a3 Be7 9.0–0 0–0 10.Nb5; 6.Nh3 Nc6 7.Be2 Be7 8.0–0 0–0 9.f4 d5 10.Nb5; 6.Nf3 Nc6 7.Bd3 Nb4 8.Be2 Be7 9.h4 b6 10.a3; 6.Bb5 Nc6 7.Nf3 b6 8.0–0 Bb7 9.Qe2 Bd6 10.Bc4; 6.a3 Be7 7.Nf3 Nc6 8.Bb5 0–0 9.0–0 d5 10.d4; 6.h3 Nc6 7.Nf3 b6 8.Bc4 Be7 9.0–0 0–0 10.Nb5; 6.Nb5 Nc6 7.Nf3 Be7 8.Ne5 0–0 9.Bc3 Ra6 10.Bd3; 6.a4 Nc6 7.Nf3 Bc5 8.Bd3 0–0 9.0–0 d5 10.Nb5; 6.h4 Nc6 7.Nf3 b6 8.Be2 Bb7 9.a4 Nb4 10.0–0) 6...Na6 7.Be2 Nb4 8.Nf3 Be7 9.a3 Nc6 10.h4; G) 5...Nc6 6.Nf3 (6.Bd3 Bc5 7.Nf3 0–0 8.0–0 d5 9.Nb5 Nb4 10.Nbd4; 6.Bb5 d5 7.Nf3 Bd6 8.0–0 0–0 9.d4 Bd7 10.Qe2; 6.a4 Bc5 7.Nf3 0–0 8.Bb5 d5 9.0–0 Bd7 10.d4; 6.h3 e5 7.Nf3 e4 8.Nd4 Nd4 9.ed4 c6 10.Qe2; 6.a3 d5 7.Nf3 Bd6 8.Nb5 0–0 9.Bc3 Ra4 10.Nd6; 6.Be2 Bc5 7.Nf3 d5 8.d4 Bd6 9.0–0 0–0 10.Nb5; 6.g3 b6 7.Nf3 Bb7 8.Be2 Be7 9.0–0 0–0 10.a4) 6...Be7 7.Bb5 0–0 8.0–0 b6 9.Qe2 Bb7 10.d4.

5.e4 A) 5...b6 6.Nf3 (6.Bd3 Na6 7.Nf3 Nc5 8.0–0 Bb7 9.e5 Nd3 10.cd3; 6.Bc4 Bb7 7.Qe2 Nc6 8.Nf3 Be7 9.0–0 0–0 10.e5) 6...Bb7 7.Bd3 Nc6 8.0–0 Nb4 9.Re1 Nd3 10.cd3; B) 5...Be7 6.Nf3 (6.Bd3 0–0 7.Nf3 Na6 8.e5 Nh5 9.Bb5 c6 10.Ba6) 6...Nc6 7.Bd3 0–0 8.0–0 Nb4 9.Be2 b6 10.e5; C) 5...Bd6 6.Nf3 (6.Bc4 0–0 7.Nf3 Nc6 8.0–0 Be7 9.Qe2 d5 10.Bd3; 6.d4 Bb4 7.a3 Be7 8.Nf3 0–0 9.Bd3 d6 10.0–0; 6.Bd3 Na6 7.Nf3 Nc5 8.Qe2 Nd3 9.cd3 Be7 10.e5; 6.Be2 b6 7.Nf3 Bb7 8.Nb5 Ne4 9.Nd6 cd6 10.d3) 6...Nc6 7.Bc4 0–0 8.0–0 Be7 9.Bd3 d5 10.Qe2; D) 5...Bb4 6.Bd3 (6.Nf3 0–0 7.a3 Be7 8.e5 Nd5 9.Nd5 ed5 10.d4; 6.a3 Be7 7.Nf3 0–0 8.e5 Nh5 9.Bb5 Nc6 10.0–0; 6.Be2 Nc6 7.Nf3 d5 8.e5 Ne4 9.0–0 0–0 10.Bd3) 6...Nc6 7.Nf3 0–0 8.0–0 d6 9.Qe2 Bd7 10.a4; E) 5...h6 6.Nf3 (6.h3 Nc6 7.Nf3 Bc5 8.e5 Nd5 9.Nd5 ed5 10.d4; 6.a4 Bb4 7.Nf3 Nc6 8.Bd3 0–0 9.0–0 d6 10.Qe2; 6.Bc4 d5 7.Bd3 Nc6 8.Nf3 Bc5 9.0–0 0–0 10.a3; 6.Be2 Nc6 7.Nf3 Bb4 8.a3 Be7 9.0–0 0–0 10.d4; 6.Bd3 Nc6 7.Nf3 Bc5 8.0–0 0–0 9.h3 d5 10.ed5) 6...Nc6 7.Bb5 Bc5 8.0–0 0–0 9.e5 Nd5 10.a4; F) 5...g6 6.Nf3 (6.Bd3 Nc6 7.Nf3 Bg7 8.Qe2 0–0 9.0–0 Ng4 10.Rfb1; 6.Be2 Bg7 7.d4 Nc6 8.Nf3 d6 9.0–0 0–0 10.Qd2) 6...Nc6 7.Bd3 Bg7 8.0–0 0–0 9.Qe2 Ng4 10.Rfb1; G) 5...h5 6.Nf3 (6.h3 Nc6 7.Nf3 Bc5 8.e5 Nd5 9.Nd5 ed5 10.d4; 6.Bd3 Nc6 7.Nf3 Bc5 8.0–0 0–0 9.h3 d6 10.a4; 6.Be2 Nc6 7.Nf3 Bb4 8.0–0 0–0 9.a3 Be7 10.d4; 6.Bc4 d5 7.ed5 ed5 8.Bd3 c5 9.Nf3 c4 10.Be2; 6.a4 Nc6 7.Nf3 Bc5 8.d4 Bb4 9.Bd3 g5 10.d5) 6...Nc6 7.Bb5 Bc5 8.a4 e5 9.0–0 0–0 10.h3; H) 5...Nc6 6.Nf3 (6.Bd3 Bc5 7.Nf3 0–0 8.0–0 d6 9.h3 Bd7 10.Re1) 6...d5 7.e5 Ne4 8.Bd3 Nc5 9.0–0 Nd3 10.cd3.

5.Nf3 A) 5...Nc6 6.e4 (6.e3 b6 7.Bd3 Bb7 8.0–0 Be7 9.a3 0–0 10.Qe2; 6.h3 d5 7.e3 Bd7 8.Be2 Be7 9.0–0 0–0 10.a4; 6.h4 Be7 7.e3 0–0 8.Be2 b6 9.0–0 Bb7 10.a4) 6...Bc5 7.e5 Nd5 8.Ne4 Ba3 9.Ba3 Ra3 10.Bb5; B) 5...b6 6.e3 (6.e4 Bb7 7.Bd3 Nc6 8.0–0 Nb4 9.Re1 Nd3 10.cd3; 6.g3 Nc6 7.e4 Bb7 8.Bc4 Ne4 9.Ne4 d5 10.Qe2; 6.h3 Nc6 7.e3 Bb7 8.Bb5 Bd6 9.0–0 0–0 10.d4) 6...Nc6 7.Bd3 Bb7 8.0–0 Be7 9.a3 0–0 10.Qe2; C) 5...Be7 6.e3 (6.e4 0–0 7.e5 Ng4 8.d4 Nc6 9.h3 Nh6 10.Bd3; 6.h3 Nc6 7.e3 0–0 8.Bb5 b6 9.0–0 h6 10.Re1; 6.a4 Nc6 7.g3 0–0 8.Bg2 h6 9.0–0 d5 10.Nb5; 6.d4 Nc6 7.e3 b6 8.Bd3 Bb7 9.0–0 0–0 10.a3; 6.g3 Nc6 7.Bg2 e5 8.d4 e4 9.Ne5 Ne5 10.de5) 6...0–0 7.Bb5 b6 8.Nd4 Bb7 9.0–0 Nc6 10.Qe2; D) 5...h5 6.e3 (6.e4 Nc6 7.Bb5 Bc5 8.0–0 Nd4 9.a4 c6 10.Bd3; 6.h3 d5 7.e3 Nc6 8.Be2 Be7 9.0–0 0–0 10.d4; 6.a4 Nc6 7.e3 Bc5 8.Bb5 d5 9.Ba3 Ba3 10.Bc6; 6.h4 Nc6 7.e3 Be7 8.Nb5 0–0 9.Ng5 Ng4 10.Bc3; 6.a3 Nc6 7.e3 Be7 8.h4 0–0 9.Bd3 e5 10.Ng5) 6...Nc6 7.h3 d5 8.Bd3 e5 9.Ng5 Nb4 10.0–0; E) 5...Bc5 6.d4 (6.e4 Nc6 7.e5 Nh5 8.d4 Bb6 9.g4 Nf4 10.Qd2; 6.e3 Nc6 7.d4 Be7 8.Bd3 0–0 9.0–0 b6 10.e4; 6.h3 Nc6 7.e3 0–0 8.d4 Bb6 9.Be2 d6 10.0–0) 6...Bb4 7.a3 Be7 8.e4 0–0 9.Bd3 d6 10.0–0; F) 5...h6 6.e4 (6.e3 Nc6 7.Bd3 Nb4 8.0–0 Be7 9.Bb5 0–0 10.Nd4; 6.h3 Nc6 7.e3 Be7 8.Bd3 Nb4 9.0–0 0–0 10.Bb5; 6.a4 Nc6 7.e4 Be7 8.Bd3 0–0 9.0–0 Nb4 10.Qe2; 6.a3 Nc6 7.e3 Bc5 8.d4 Be7 9.Bd3 0–0 10.0–0; 6.h4 Nc6 7.e3 Be7 8.Bd3 0–0 9.a4 e5 10.0–0; 6.g3 Nc6 7.Bg2 d5 8.a4 Bb4 9.0–0 Bd7 10.Nb5) 6...Nc6 7.Bb5 Bc5 8.0–0 0–0 9.e5 Nd5 10.Qe2; G) 5...d5 6.e3 (6.a4 Nc6 7.g3 Bc5 8.Bg2 e5 9.Nb5 d4 10.0–0) 6...Bd7 7.Bd3 Nc6 8.0–0 Be7 9.a4 e5 10.e4.

5.g3 A) 5...b6 6.Bg2 (6.Nf3 Nc6 7.a4 Rh5 8.Nb5 Bb7 9.Bg2 Be7 10.0–0; 6.a4 Nc6 7.Nf3 Rh5 8.Nb5 Bc5 9.e3 0–0 10.Bg2; 6.e3 Nc6 7.Nf3 Bb7 8.Be2 Be7 9.0–0 0–0 10.a4; 6.d4 Bb7 7.Nf3 Bd6 8.Bg2 0–0 9.0–0 Qe7 10.a4) 6...Nc6 7.Nh3 Bd6 8.0–0 0–0 9.Nf4 Bf4 10.gf4; B) 5...e5 6.Nf3 (6.e4 Bc5 7.Nf3 Nc6 8.Bg2 0–0 9.0–0 d6 10.a4; 6.e3 Nc6 7.Nb5 Be7 8.Nf3 d6 9.a4 0–0 10.d3; 6.a4 Nc6 7.Bg2 Bc5 8.Nf3 e4 9.Nh4 d5 10.d3; 6.f4 ef4 7.gf4 d5 8.e3 Nc6 9.Nf3 Be7 10.Rg1) 6...Nc6 7.e4 Bc5 8.Bb5 0–0 9.0–0 Nd4 10.Bd3; C) 5...Bb4 6.Nf3 (6.e3 Nc6 7.Nf3 d5 8.a3 Bd6 9.Nb5 0–0 10.Nd6; 6.a3 Be7 7.Nf3 Nc6 8.d4 0–0 9.Bg2 h6 10.0–0; 6.Bg2 d5 7.a4 Nc6 8.Nf3 0–0 9.0–0 e5 10.Nb5; 6.a4 0–0 7.Bg2 Nc6 8.Nf3 Rh5 9.0–0 d5 10.Nb5; 6.Nh3 Nc6 7.Nf4 d5 8.Bg2 e5 9.Nd3 Be7 10.0–0) 6...Nc6 7.e3 0–0 8.a3 Be7 9.Bb5 d5 10.0–0; D) 5...Bd6 6.Nf3 (6.a4 0–0 7.Nf3 c6 8.Bg2 Qb6 9.Rb1 Na6 10.0–0; 6.Bg2 Nc6 7.a4 Rf5 8.Nf3 0–0 9.0–0 Be7 10.Nb5; 6.e3 Nc6 7.Nf3 0–0 8.a4 Bb4 9.Bb5 d6 10.Na2; 6.e4 Nc6 7.Nf3 0–0 8.Bd3 b6 9.Qe2 Ne5 10.a4) 6...Nc6 7.a4 0–0 8.Nb5 Bb4 9.Bg2 d5 10.0–0; E) 5...d5 6.e3 Bd7 7.Nf3 Nc6 8.Be2 Bb4 9.a3 Be7 10.a4; F) 5...Be7 6.e3 (6.Nf3 Nc6 7.a4 0–0 8.Bg2 Rh5 9.0–0 d5 10.h3; 6.a4 0–0 7.Nf3 Na6 8.d4 Nb4 9.Bg2 d6 10.0–0) 6...0–0 7.Nf3 Nc6 8.Be2 e5 9.Nb5 d6 10.0–0; G) 5...h6 6.e3 (6.Nf3 Be7 7.Bg2 0–0 8.0–0 d5 9.a4 Bd7 10.d3; 6.e4 Be7 7.Nf3 Nc6 8.Bb5 0–0 9.0–0 d5 10.e5; 6.Bg2 Nc6 7.Nf3 d5 8.a4 Bb4 9.0–0 0–0 10.Nb5; 6.d4 Nc6 7.Nf3 d5 8.Bg2 Be7 9.0–0 0–0 10.Ne5) 6...Nc6 7.Nf3 Be7 8.Bb5 0–0 9.0–0 b6 10.d4; H) 5...h5 6.Nf3 (6.d4 Nc6 7.Nf3 d5 8.Bg2 Be7 9.0–0 0–0 10.Qd3; 6.a4 h4 7.gh4 Rh4 8.Nf3 Rg4 9.Bh3 Rg6 10.Rg1) 6...Nc6 7.Bg2 d5 8.a4 Bb4 9.0–0 0–0 10.Nb5; I) 5...Nc6 6.Nf3 (6.a4 b6 7.Nf3 Bb4 8.Nb5 0–0 9.Bg2 Bb7 10.0–0; 6.e3 b6 7.Nf3 Bb7 8.Be2 Be7 9.0–0 0–0 10.a4; 6.Bg2 d5 7.d4 Bd7 8.Nf3 Be7 9.0–0 0–0 10.Ne5) 6...b6 7.e4 Bb7 8.Bc4 Ne4 9.Ne4 d5 10.Qe2.

5.Nh3 A) 5...b6 6.e3 (6.Nf4 e5 7.Nd3 Bb7 8.e3 Nc6 9.a4 Be7 10.Nb5; 6.a4 Nc6 7.e3 Bb7 8.Nf4 Bd6 9.Nb5 Be5 10.Be5; 6.a3 Nc6 7.e3 Be7 8.Bb5 0–0 9.0–0 Bb7 10.d4; 6.e4 Nc6 7.Bd3 Bb7 8.0–0 Bd6 9.Rb1 Ne5 10.Nb5) 6...Bb7 7.Nf4 Bd6 8.Bb5 Bf4 9.ef4 Bg2 10.Rg1; B) 5...d5 6.e3 Nc6 7.Nb5 Bd7 8.Be2 Be7 9.0–0 0–0 10.a4; C) 5...Nc6 6.e3 d5 7.Nb5 Bd7 8.Be2 Bc5 9.d4 Bb4 10.c3; D) 5...Be7 6.e4 (6.g3 Nc6 7.Bg2 e5 8.0–0 d5 9.a4 0–0 10.Nb5; 6.e3 Nc6 7.Bb5 0–0 8.0–0 d5 9.d4 Bd7 10.Nf4; 6.a4 Nc6 7.g3 0–0 8.Bg2 Ne5 9.Nb5 Nc4 10.Bc3; 6.d4 Nc6 7.e3 0–0 8.Be2 d6 9.0–0 e5 10.d5; 6.f3 Nc6 7.e3 d5 8.Bd3 Bd7 9.0–0 0–0 10.Qe2) 6...Nc6 7.Bd3 0–0 8.0–0 e5 9.Ng5 h6 10.Nf3; E) 5...Bc5 6.e3 (6.d4 Be7 7.e3 Nc6 8.Be2 0–0 9.0–0 b6 10.Nf4; 6.Nf4 Nc6 7.e3 0–0 8.Be2 Bb6 9.0–0 e5 10.Nd3; 6.g3 e5 7.Bg2 Nc6 8.0–0 d5 9.a4 0–0 10.Nb5; 6.e4 Bd4 7.Bd3 Nc6 8.0–0 0–0 9.Nf4 Ne5 10.Nfe2) 6...Nc6 7.d4 Be7 8.Be2 0–0 9.0–0 b6 10.Nf4; F) 5...Bb4 6.a3 (6.e3 Nc6 7.Bd3 Ne5 8.0–0 0–0 9.Be2 d5 10.f4; 6.Nf4 Nc6 7.e4 0–0 8.Bd3 b6 9.0–0 Bb7 10.Nb5; 6.g3 Nc6 7.Nf4 d5 8.Bg2 e5 9.Nd3 Bf5 10.0–0) 6...Bc5 7.e3 Nc6 8.d4 Bb6 9.Nb5 Qe7 10.Bd3.

4.Nf3 Nc6

5.Na3 A) 5...d5 6.e3 g6 7.Nb5 Bg7 8.Bc3 Ra4 9.Bd3 0–0 10.0–0; B) 5...d6 6.e3 e5 7.Nc4 Rd5 8.Be2 Be7 9.d3 h6 10.0–0; C) 5...Rh5 6.e3 (6.h3 e6 7.e3 Bb4 8.Bd3 0–0 9.Rb1 e5 10.Nc4) 6...e5 7.Be2 Bc5 8.0–0 0–0 9.Nc4 d6 10.d4; D) 5...g6 6.Nc4 (6.e3 d5 7.Nb5 Bg7 8.Bc3 Ra4 9.Bd3 0–0 10.0–0; 6.e4 Bg7 7.Nc4 Ra4 8.e5 Nd5 9.Bd3 Nf4 10.0–0; 6.g4 Rg8 7.Nc4 Ra4 8.g5 Rc4 9.gf6 ef6 10.e3) 6...Ra4 7.e3 Bg7 8.Bd3 d5 9.Nce5 0–0 10.0–0; E) 5...e6 6.Nc4 Rd5 7.e3 b5 8.Nce5 Bb7 9.Nc6 Bc6 10.Nd4.

5.a4 g6 (5...e5 6.Na3 e4 7.Nd4 Nd4 8.Bd4 Bc5 9.Bc5 Rc5 10.g3) 6.Nc3 (6.e3 Bg7 7.Bb5 0–0 8.0–0 d5 9.Nc3 Ne4 10.d4; 6.Bc3 Ra8 7.Na3 Bg7 8.e3 0–0 9.Nb5 Re8 10.Be2; 6.h3 Bh6 7.Nc3 0–0 8.e3 d5 9.Bb5 Bf5 10.0–0; 6.Na3 d5 7.e3 Bg7 8.Bd3 0–0 9.Nb5 Ne4 10.Bg7; 6.g3 Bh6 7.Nc3 0–0 8.Bg2 d6 9.0–0 Rh5 10.Nb5) 6...Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Ne4 10.d4.

5.Bc3 Rf5 =.

5.Nc3 A) 5...e5 6.e4 (6.e3 e4 7.Nd4 Nd4 8.ed4 c6 9.Be2 d5 10.0–0) 6...Bc5 7.Bc4 0–0 8.0–0 d6 9.h3 Be6 10.Bb3; B) 5...d5 6.e3 (6.a4 g6 7.e4 d4 8.Nb5 Bg7 9.Nbd4 Nd4 10.Bd4) 6...g6 7.Nb5 Bg7 8.Bc3 Ra6 9.Bd3 0–0 10.0–0; C) 5...g6 6.e3 (6.h3 Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Bf5 10.a4; 6.Ne4 Bg7 7.Nf6 Bf6 8.Bf6 ef6 9.e3 0–0 10.d4; 6.a4 Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Ne4 10.d4; 6.a3 Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Bf5 10.h3; 6.Rb1 Bg7 7.e4 0–0 8.Bc4 e6 9.0–0 d5 10.ed5) 6...Bg7 7.Bd3 0–0 8.0–0 d6 9.h3 Nb4 10.Bc4.

5.e3 A) 5...g6 6.Bc3 (6.a4 Bg7 7.Nc3 0–0 8.Bb5 d5 9.0–0 Ne4 10.d4; 6.Bd3 Bg7 7.Na3 0–0 8.0–0 d5 9.Nb5 Ne4 10.Bg7; 6.Nc3 Bg7 7.Bb5 0–0 8.0–0 d5 9.a4 Ne4 10.d4; 6.Na3 d5 7.Nb5 Bg7 8.Bc3 Ra6 9.Nbd4 Nd4 10.Bd4; 6.h3 Bg7 7.Nc3 0–0 8.Bb5 Ne4 9.a4 d5 10.0–0) 6...Ra8 7.Bf6 ef6 8.Nc3 d5 9.Bb5 Bc5 10.Nd4; B) 5...d5 6.Nc3 (6.Na3 g6 7.Nb5 Bg7 8.Bc3 Ra6 9.Nbd4 Nd4 10.Bd4; 6.Bc3 Ra8 7.Bb5 Bd7 8.Bf6 gf6 9.Nc3 Rg8 10.g3; 6.a4 g6 7.Nc3 Bg7 8.Bb5 0–0 9.0–0 Ne4 10.Qb1; 6.Bd3 g6 7.Nc3 Bg7 8.Nb5 0–0 9.Bc3 Ra6 10.0–0; 6.Ne5 Qd6 7.Nc6 bc6 8.Bd3 g6 9.Nc3 Bg7 10.0–0) 6...g6 7.Nb5 Bg7 8.Bc3 Ra6 9.Nbd4 Nd4 10.Bd4; C) 5...e5 6.Be2 (6.Bc3 Rc5 7.Be2 e4 8.Nd4 Be7 9.0–0 0–0 10.Bb2; 6.Nc3 e4 7.Nd4 Nd4 8.ed4 d5 9.Be2 c6 10.0–0; 6.a4 Bb4 7.Na3 e4 8.Nd4 0–0 9.Nab5 Nd4 10.Nd4) 6...Be7 7.Nc3 0–0 8.Nb5 d6 9.0–0 Bf5 10.a4.

5.g3 e5+= 6.d3 (6.Bg2 d6+=) 6...d5 (6...Bb4 7.Nbd2+=) 7.Bg2 (7.Ne5 Ne5 8.Be5 d4+=) 7...Bb4 (7...Bd6 8.0–0–/+) 8.c3 (8.Nbd2 d4+=) 8...Be7 (8...Bd6 9.0–0+=) 9.0–0+= 0–0 10.e3 (10.Nbd2 Re8+=) 10...Bf5–/+ 11.d4 (11.Nh4 Bg4 12.Qc2 Qd7–/+) 11...e4 12.Nfd2 Qd7 (12...Qa8 13.c4 dc4 14.Nc3+=) 13.Re1 (13.c4 Nb4–/+) 13...Bh3 (13...Rfa8 14.Qb3–+) 14.f3 Bg2 15.Kg2 Rfa8 16.a3 (16.fe4 de4 (16...Ra2?! 17.Ra2 Ra2 18.Qb3=) 17.Qb3 R5a6–/+) 16...Qe6 (16...Rb5 17.Bc1 Qe6–/+) 17.f4 (17.fe4!? Ne4 18.Ne4 de4 19.Rf1–/+) 17...R5a6 (17...b5 18.Rf1–+) 18.Nb3 (18.c4 dc4 19.Nc3 Ba3 20.Ba3 Ra3 21.Ra3 Ra3–+) 18...Nb8 (18...Ra4 19.Rf1–+) 19.Rh1 (19.N3d2 b5–+) 19...Nbd7 20.h3 (20.Rf1 b5–+) 20...Nb6 21.Ra2 (21.N3d2 Na4 22.Ra2 b5–+) 21...Na4 (21...Nc4 22.Qe2–+) 22.Bc1 (22.Qe2 c6–+) 22...Ne8 (22...b5 23.Qe2–+) 23.g4 (23.Qc2 Nd6–+) 23...Qc6 (23...Nd6 24.N3d2–+) 24.Qd2 (24.Qc2 b5–+) 24...Rb6 (24...Rb6 25.Qd1 Qc4–+ (25...Nc3?! 26.Nc3 Qc3 27.Nc5–+)) 0–1. rasputin – pcmvr (1820), internet, 2005.

4.Nf3 e6

5.a4 A) 5...b6 6.Nc3 (6.e3 Nc6 7.Nc3 Bb7 8.Nb5 Bc5 9.Be2 0–0 10.0–0; 6.Na3 Ra4 7.e3 Nc6 8.Be2 Bc5 9.0–0 0–0 10.Nb5; 6.g3 Nc6 7.Nc3 Be7 8.e4 0–0 9.Bb5 Bb7 10.0–0; 6.Bc3 Rh5 7.e3 Nc6 8.h4 h6 9.Bd3 Bb7 10.Na3; 6.h4 Nc6 7.e3 Be7 8.Be2 0–0 9.Nc3 Bb7 10.0–0; 6.h3 Nc6 7.e3 Bb7 8.Nc3 Nb4 9.Be2 Be7 10.0–0) 6...Nc6 7.e3 Bb7 8.Bc4 Bb4 9.0–0 0–0 10.Qe2; B) 5...Rh5 6.Nc3 (6.e3 Nc6 7.Nc3 Bb4 8.Be2 0–0 9.0–0 h6 10.Nd4; 6.h4 Nc6 7.e3 Be7 8.Nc3 0–0 9.Be2 Rh6 10.0–0; 6.Na3 Nc6 7.e3 Bc5 8.Nb5 0–0 9.Bf6 Qf6 10.Nc7; 6.h3 Nc6 7.e3 Bc5 8.Nc3 0–0 9.Be2 d5 10.0–0; 6.a5 Nc6 7.Nc3 Bd6 8.e3 0–0 9.Be2 Bb4 10.0–0) 6...Nc6 7.e3 b6 8.Nb5 Bb7 9.h3 h6 10.Bd3; C) 5...d5 6.Nc3 (6.e3 Nc6 7.Nc3 Bc5 8.Be2 0–0 9.d4 Bb4 10.0–0; 6.g3 Bc5 7.Nc3 d4 8.Nb5 Nc6 9.Bg2 0–0 10.0–0; 6.Na3 Ra4 7.c4 Ra5 8.e3 Be7 9.cd5 ed5 10.Bc3) 6...Nc6 7.g3 e5 8.Nb5 Bc5 9.Bg2 d4 10.c3; D) 5...Be7 6.Nc3 (6.e3 Nc6 7.Nc3 0–0 8.Be2 h6 9.0–0 b6 10.Nb5; 6.g3 b6 7.Bg2 Nc6 8.0–0 0–0 9.Nc3 Ba6 10.Qc1; 6.Na3 Ra4 7.e3 Nc6 8.Nb5 Ra1 9.Qa1 Nb4 10.Qa5) 6...Nc6 7.e3 0–0 8.Bb5 b6 9.0–0 Bb7 10.Re1; E) 5...Nc6 6.Nc3 (6.e3 Bc5 7.Nc3 0–0 8.Bb5 d5 9.0–0 Bd7 10.d4; 6.g3 Bc5 7.Nc3 0–0 8.Bg2 e5 9.Nb5 d5 10.0–0; 6.h3 Bc5 7.e3 0–0 8.Bb5 d5 9.Nc3 Nb4 10.0–0) 6...Bc5 7.g3 0–0 8.Bg2 e5 9.0–0 e4 10.Ng5.

5.Nc3 A) 5...Nc6 6.e4 (6.e3 d5 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0 10.Ne5) 6...Bc5 7.e5 Nd5 8.Nd5 ed5 9.Be2 0–0 10.0–0; B) 5...d5 6.e3 (6.a4 Nc6 7.g3 Bb4 8.Bg2 0–0 9.0–0 h6 10.Nb5) 6...Nc6 7.Be2 Bb4 8.Nb5 Ne4 9.a4 0–0 10.0–0; C) 5...b6 6.e4 (6.e3 Nc6 7.Bd3 Be7 8.0–0 Bb7 9.a3 0–0 10.Qe2; 6.a4 Nc6 7.e3 Bb7 8.Nb5 Be7 9.Be2 0–0 10.0–0) 6...Bb7 7.Bc4 Ne4 8.Ne4 Be4 9.0–0 d5 10.Be2; D) 5...Bb4 6.a3 (6.e3 0–0 7.a3 Be7 8.d4 Nc6 9.Bd3 h6 10.0–0; 6.e4 Nc6 7.Bd3 0–0 8.0–0 d6 9.Qe2 Bd7 10.a4; 6.h3 0–0 7.e3 d5 8.a3 Be7 9.Bb5 Bd7 10.Qe2) 6...Be7 7.e4 0–0 8.e5 Nd5 9.Nd5 ed5 10.d4; E) 5...h6 6.e3 (6.e4 Nc6 7.Bb5 Bc5 8.0–0 0–0 9.e5 Nd5 10.a4; 6.a3 Nc6 7.e4 Be7 8.Bd3 0–0 9.0–0 b6 10.Qe2; 6.a4 Nc6 7.e4 Be7 8.Bd3 0–0 9.0–0 Nb4 10.Qe2) 6...Nc6 7.Bd3 Be7 8.0–0 0–0 9.a4 Nb4 10.Be2; F) 5...Bc5 6.e3 (6.d4 Bb4 7.a3 Be7 8.e4 d6 9.Bd3 0–0 10.0–0; 6.e4 Nc6 7.e5 Nh5 8.Ne4 Be7 9.Bc3 Ra4 10.d4) 6...0–0 7.d4 Be7 8.Bd3 Nc6 9.a3 h6 10.0–0; G) 5...Bd6 6.e4 (6.e3 Nc6 7.Bd3 0–0 8.0–0 Bc5 9.Qe2 e5 10.h3; 6.d4 Nc6 7.e3 0–0 8.Bd3 Nb4 9.0–0 Nd3 10.Qd3; 6.a4 Nc6 7.Nb5 Bc5 8.e3 0–0 9.Be2 d5 10.0–0; 6.g4 h6 7.e3 Nc6 8.Nb5 Bc5 9.Nfd4 Ra4 10.Rg1; 6.h4 Nc6 7.e3 0–0 8.Be2 b6 9.Nb5 Be7 10.0–0) 6...Nc6 7.Bb5 0–0 8.0–0 e5 9.Qe2 Nd4 10.Qd3; H) 5...h5 6.e3 (6.e4 Nc6 7.Bb5 Bc5 8.Qe2 0–0 9.e5 Nd5 10.Nd5; 6.h3 Nc6 7.e3 d5 8.Nb5 Bc5 9.Bc3 Bb4 10.Bb4; 6.a4 Be7 7.e4 Nc6 8.Bd3 0–0 9.0–0 Nb4 10.Qe2; 6.h4 Nc6 7.e3 Be7 8.Nb5 0–0 9.Bc3 Ra4 10.Ng5; 6.a3 Be7 7.e3 0–0 8.Bd3 Na6 9.0–0 Nc5 10.Be2; 6.d4 Nc6 7.e3 b6 8.Bd3 Nb4 9.Be2 Bb7 10.0–0) 6...Nc6 7.a3 d5 8.Nb5 Bc5 9.Bf6 gf6 10.d4; I) 5...Be7 6.e3 (6.e4 Nc6 7.Bd3 0–0 8.0–0 Nb4 9.Be2 b6 10.e5; 6.h3 Nc6 7.e3 0–0 8.Bb5 b6 9.0–0 Bb7 10.Re1; 6.a4 Nc6 7.g3 0–0 8.Bg2 Rh5 9.0–0 d5 10.d4; 6.Rb1 0–0 7.e3 Nc6 8.Bb5 b6 9.0–0 Bb7 10.h3; 6.g3 Nc6 7.a4 0–0 8.Bg2 Rh5 9.d4 d5 10.0–0) 6...d5 7.Bd3 Nc6 8.Nb5 0–0 9.0–0 Nb4 10.a4.

5.d3 Be7 6.Nbd2 Nc6 7.g3 0–0 8.Bg2 b6 9.0–0 Bb7 10.c4 d5 11.Qc2 dc4 12.Nc4 Ra8 13.a3 Rb8 14.Bc3 h6 15.Rfb1 Bd6 16.e4 e5 17.Ne3 Nd4 18.Bd4 ed4 19.Nd4 Re8 20.Ndf5 Qd7 21.Qb3 Kh7 22.Ra2 g6 23.Nh4 Bc8 24.Nc4 Qe6 25.Rab2 Ng4 26.Qd1 h5 27.Qe2 Ne5 28.Ne3 Bc5 29.Nd5 Qd6 30.Nf3 Nf3 31.Bf3 Be6 32.Nb4 Bb4 33.Rb4 c5 34.R4b2 f5 35.a4 fe4 36.de4 (36.Qe4?! Ba2 37.Ra2 Re4 38.Be4 Rf8=) 1–0. linakip – sonmi21, kurnik, 2012.

5.e3 Bb4 6.Nc3 (6.Bd3 Nc6 7.Nc3 0–0 8.0–0 d5 9.a3 Be7 10.Nb5; 6.a3 Be7 7.Nc3 0–0 8.d4 Nc6 9.Bd3 d5 10.0–0; 6.h3 0–0 7.Nc3 Nc6 8.a3 Be7 9.d4 h6 10.Bd3; 6.h4 Nc6 7.Nc3 0–0 8.a3 Be7 9.Be2 d5 10.0–0; 6.Bc3 Nc6 7.a3 Bc3 8.Nc3 0–0 9.Bb5 b6 10.0–0; 6.Bc4 d5 7.Bd3 Nc6 8.0–0 0–0 9.Qe2 Bd7 10.a3; 6.Be2 Nc6 7.a3 Be7 8.Nc3 0–0 9.0–0 d5 10.a4) 6...0–0 7.Bd3 Nc6 8.Nb5 d5 9.a3 Be7 10.Bc3.

5.e3 b6 6.Nc3 (6.Bd3 Nc6 7.Nc3 Be7 8.0–0 0–0 9.a3 Bb7 10.Qe2; 6.Bc4 Nc6 7.Nc3 Be7 8.0–0 0–0 9.Nb5 d5 10.Be2; 6.Ne5 Bb7 7.Bc3 Ra8 8.Bb5 Bg2 9.Rg1 Bb7 10.d3; 6.Be2 Nc6 7.Nc3 Be7 8.Nb5 0–0 9.0–0 Bb7 10.h3; 6.h3 Nc6 7.Nc3 Be7 8.Bb5 Bb7 9.0–0 0–0 10.Re1; 6.Bc3 Rh5 7.Bf6 Qf6 8.Nc3 Nc6 9.Nb5 Kd8 10.Nfd4; 6.h4 Nc6 7.Nc3 Bb7 8.Nb5 Bc5 9.Be2 0–0 10.0–0; 6.a4 Nc6 7.Nc3 Be7 8.Bb5 Bb7 9.0–0 0–0 10.d4; 6.a3 Be7 7.Nc3 0–0 8.Bb5 Nc6 9.0–0 h6 10.Qe2; 6.g3 Nc6 7.Nc3 Bb7 8.Be2 Be7 9.0–0 0–0 10.a4; 6.Qc1 Nc6 7.Na3 Bc5 8.Bd3 Bb7 9.Nc4 Ra4 10.0–0; 6.d4 Nc6 7.Nc3 Bb7 8.a3 Qa8 9.a4 Nb4 10.Be2) 6...Nc6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5 10.Nb5.

5.e3 Bc5 6.d4 (6.Nc3 Nc6 7.d4 Be7 8.Bd3 0–0 9.0–0 b6 10.a3) 6...Be7 7.Bd3 Nc6 8.Nc3 0–0 9.0–0 b6 10.a3.

5.e3 Nc6 6.Nc3 (6.Be2 Be7 7.Nc3 0–0 8.0–0 b6 9.a4 Bb7 10.h3; 6.h3 Bc5 7.Nc3 0–0 8.d4 Bb6 9.Be2 d6 10.0–0; 6.Bd3 Bc5 7.Nc3 0–0 8.0–0 e5 9.a4 d6 10.Bb5; 6.a4 Bc5 7.Nc3 0–0 8.Be2 e5 9.Nb5 Re8 10.0–0; 6.a3 d5 7.Nc3 Bd6 8.Nb5 0–0 9.Bc3 Ra8 10.Bd3; 6.g3 e5 7.Be2 Be7 8.0–0 0–0 9.Nc3 e4 10.Nd4; 6.h4 Be7 7.Nc3 0–0 8.Be2 b6 9.0–0 Bb7 10.a4; 6.Bc4 b5 7.Bd3 b4 8.a3 Bc5 9.0–0 0–0 10.c3) 6...d5 7.Be2 Be7 8.0–0 0–0 9.a4 Bd7 10.d3.

5.e3 d5 6.c4 (6.Nc3 Nc6 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0 10.Ne5; 6.Bd3 Nc6 7.0–0 Bd6 8.Nc3 0–0 9.Qe2 h6 10.e4; 6.h3 Nc6 7.Nc3 Bd7 8.Be2 Be7 9.0–0 0–0 10.d4; 6.Bc3 Ra8 7.Bd3 Nc6 8.0–0 Bc5 9.Ne5 0–0 10.Qf3; 6.Be2 Nc6 7.Nc3 Bb4 8.a3 Bc5 9.d4 Bd6 10.0–0; 6.a4 Nc6 7.Nc3 Bc5 8.Be2 0–0 9.0–0 Bd7 10.Nb5; 6.h4 Nc6 7.Nc3 Bc5 8.d4 Bd6 9.Bd3 0–0 10.Nb5; 6.a3 Nc6 7.Nc3 Bd6 8.Nb5 0–0 9.Bc3 Ra4 10.Nd6; 6.g3 Nc6 7.Nc3 Bd7 8.Be2 Be7 9.0–0 0–0 10.Nb5) 6...Bd6 (6...Nc6 7.Nc3 Be7 8.Be2 0–0 9.0–0 b6 10.cd5) 7.Bc3 (7.d4 b6 8.cd5 ed5 9.Nc3 0–0 10.Bb5) 7...Ra8 8.cd5 (8.Be5 Nc6 (8...Be5 9.Ne5 d4 10.Qf3) 9.Bd6 (9.Bf6 Qf6 10.Nc3) 9...Qd6= 10.Nc3) 8...ed5+= 9.Be2 (9.Bf6 Qf6 10.Nc3) 9...0–0 (9...Nbd7 10.Bf6) 10.0–0 c5 (10...Re8 11.Qc2+=) 11.Qb3 Nc6 12.Bb2 (12.Qb2 Be7+=) 12...Re8+= 13.Bb5 (13.Rc1 c4 14.Qd1 Bf5+=) 13...Bd7 14.Nc3 c4 15.Qd1 Ne5 (15...Nb4 16.Bd7 Qd7 17.Ne1–/+) 16.Ne5 Be5 17.Bd7 Qd7 18.f4 Bc7 19.Qf3 (19.Ne2 Ne4–/+) 19...b5 (19...d4 20.Nd1 Bb6 21.Qe2–/+) 20.a3 Red8 (20...d4 21.Ne2 d3 22.Ng3–/+) 21.Ne2 (21.Rab1 Ne4 22.Ne4 de4 23.Qe4 Qd2+=) 21...Ne4–/+ 22.Rfd1 Nc5 (22...Ba5 23.Nc3–/+) 23.Qg3+= f5 24.Nd4 g6 25.Qh4 Bd6 26.Nb5 (26.Nf3 Nd3 27.Qf6 Nb2 28.Qb2 Ra5–/+) 26...Be7–/+ (26...Qb5?! 27.Qf6 Qb7 28.Rdb1=) 27.Qh6 Bf8 28.Qg5? (better is 28.Qh4 Qb5 29.Qf6–/+) 28...Ne4 (28...Qb5?! 29.Qf6 Qa6 30.Qh8 Kf7 31.Qh7 Ke8 32.Rdb1–/+) 29.Qh4 Qb5 30.Bf6 (30.Bd4 Rdb8 31.g4 fg4 (31...Ba3?! 32.Ra3 Ra3 33.Qe7–/+) 32.Qg4 Qc6–+ (32...Ba3?! 33.Qe6 Kf8 34.Qe5–+)) 30...Nf6 (30...Nf6 31.Qf6 Qd7–+) 0–1. fraus (2110) – moonlightconcert (2540), net–chess.com, 2002.

5.e3 Bd6 6.a4 (6.Nc3 Nc6 7.Bd3 Nb4 8.Bc4 0–0 9.0–0 b6 10.Nb5; 6.Bc4 b5 7.Bd3 b4 8.a3 Nc6 9.c3 bc3 10.Nc3; 6.Bd3 Na6 7.Nc3 Nc5 8.Be2 0–0 9.0–0 b6 10.Nb5; 6.Qc1 Bb4 7.Na3 Nc6 8.Nc4 Rh5 9.a3 Bc5 10.d4; 6.Be2 Nc6 7.Nc3 0–0 8.0–0 b6 9.Nb5 Be7 10.c4; 6.g3 Nc6 7.Nc3 0–0 8.Be2 b6 9.Nb5 Be7 10.0–0; 6.a3 Nc6 7.Nc3 0–0 8.Bd3 Bc5 9.Nb5 d5 10.0–0; 6.g4 Nc6 7.g5 Ne4 8.Bg7 Rg8 9.Bc3 Rag5 10.Ng5; 6.h4 Nc6 7.Nc3 0–0 8.Bd3 Nb4 9.Be2 b6 10.a3; 6.Bc3 Ra8 7.Bb2 Nc6 8.Nc3 0–0 9.Be2 Be7 10.0–0) 6...0–0 7.Na3 Ra4 8.Nb5 Ra1 9.Qa1 Be7 10.Be2.

5.e3 Be7 6.Nc3 (6.Bd3 0–0 7.0–0 Nc6 8.Nc3 e5 9.e4 d5 10.ed5; 6.Bc4 b5 7.Bd3 b4 8.0–0 Nc6 9.a3 Bb7 10.ab4; 6.h3 Nc6 7.Nc3 0–0 8.Bb5 b6 9.0–0 Bb7 10.Re1; 6.d4 Nc6 7.Nc3 0–0 8.Be2 b6 9.0–0 h6 10.Qd2; 6.a4 Nc6 7.Nc3 0–0 8.Bb5 b6 9.0–0 Bb7 10.d4; 6.Be2 0–0 7.Nc3 Nc6 8.0–0 b6 9.Nb5 Bb7 10.h3; 6.a3 Nc6 7.Nc3 0–0 8.Bb5 h6 9.0–0 d5 10.Qe2; 6.g3 Nc6 7.Nc3 0–0 8.Bb5 d6 9.0–0 e5 10.d4) 6...0–0 7.Bd3 Nc6 8.0–0 d5 9.Nb5 Nb4 10.a4.

5.e3 h5 6.Nc3 (6.Bd3 Na6 7.Nc3 Nb4 8.Be2 Bc5 9.0–0 0–0 10.h4; 6.a3 Be7 7.Nc3 0–0 8.Bd3 Na6 9.Be2 b6 10.0–0; 6.a4 Nc6 7.Nc3 Bc5 8.Be2 0–0 9.0–0 d5 10.Ng5; 6.d4 Nc6 7.Nc3 Be7 8.Bd3 0–0 9.0–0 b6 10.a3; 6.h4 Nc6 7.Nc3 Bc5 8.Be2 d5 9.0–0 Ng4 10.Nb5; 6.Be2 Nc6 7.Nc3 Be7 8.0–0 0–0 9.a4 d5 10.h3) 6...Nc6 7.h3 Be7 8.Bd3 d5 9.0–0 0–0 10.Ne2.

5.e3 h6 6.Nc3 (6.Bd3 Nc6 7.Nc3 Be7 8.0–0 0–0 9.Nd4 e5 10.Nc6; 6.a4 Nc6 7.Nc3 Be7 8.Bd3 Nb4 9.0–0 0–0 10.Be2) 6...Nc6 7.Bd3 Nb4 8.Bb5 Be7 9.0–0 0–0 10.Nd4.

5.g3 A) 5...d5 6.Bg2 (6.e3 Nc6 7.Nc3 Bd7 8.Bg2 e5 9.d4 e4 10.Ne5; 6.a4 Bc5 7.Bg2 Nc6 8.d4 Bb4 9.Nc3 0–0 10.0–0) 6...Nc6 7.0–0 Bd6 8.a4 e5 9.d4 e4 10.Ne5; B) 5...Be7 6.e3 (6.Nc3 0–0 7.Bg2 Nc6 8.0–0 h6 9.a4 d5 10.Nb5; 6.Bg2 Rb5 7.Bf6 Bf6 8.Nc3 Ra5 9.d4 Nc6 10.a4; 6.a4 b6 7.Nc3 Nc6 8.e4 Nb4 9.Bb5 c6 10.Be2; 6.Bh3 Nc6 7.Nc3 Rh5 8.Bg2 0–0 9.0–0 d5 10.d4) 6...Nc6 7.Nc3 0–0 8.Bb5 d6 9.0–0 e5 10.d4; C) 5...Bd6 6.Bc3 (6.Nc3 Nc6 7.a4 0–0 8.Bg2 Bb4 9.0–0 d5 10.Nb5; 6.a4 Nc6 7.Nc3 Rh5 8.Bg2 0–0 9.0–0 Be7 10.Nb5; 6.Bg2 Nc6 7.Nc3 b6 8.0–0 0–0 9.a4 Ba6 10.Qc1; 6.e3 Nc6 7.Nc3 0–0 8.Be2 b6 9.0–0 Bb7 10.Nb5; 6.c4 Nc6 7.Nc3 b6 8.Bg2 Ba6 9.Qb3 0–0 10.0–0; 6.e4 Ne4 7.Nc3 Ba3 8.Ba3 Nc3 9.dc3 Ra3 10.Qd4) 6...Ra8 7.Bf6 gf6 8.Nc3 Nc6 9.e3 Rg8 10.Bb5; D) 5...h6 6.Nc3 (6.e3 Nc6 7.Nc3 Be7 8.Bb5 0–0 9.0–0 b6 10.e4; 6.Bg2 Nc6 7.Nc3 Bb4 8.0–0 0–0 9.a3 Be7 10.a4) 6...Nc6 7.Bg2 Bb4 8.0–0 0–0 9.a3 Be7 10.a4; E) 5...Nc6 6.Nc3 (6.Bg2 d5 7.0–0 Rb5 8.Bf6 Qf6 9.Nc3 Rb6 10.a4; 6.e3 e5 7.Be2 Be7 8.Nc3 0–0 9.0–0 e4 10.Nd4; 6.a4 g5 7.Nc3 g4 8.Nh4 Ne5 9.e3 Ng6 10.Bd3; 6.Bh3 g5 7.Bg2 Rb5 8.Qc1 g4 9.Nd4 Rb6 10.Nc6; 6.d4 Rb5 7.Qc1 Ne4 8.e3 Rb6 9.Bd3 Ng5 10.Ng5) 6...b6 7.e4 Bb7 8.Bc4 Ne4 9.Ne4 d5 10.Qe2.

3.Bb2 h5

4.Nc3 Nc6 A) 5.e3 Nf6 (5...e5 6.Nf3 Nf6 7.Nb5 d6 8.Bc4 Bf5 9.0–0 h4; 5...d5 6.Nf3 Nf6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...e6 6.Nf3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4) 6.Nf3 e5 7.Bb5 Be7 8.0–0 0–0 9.e4 Bc5; B) 5.e4 Nf6 (5...e6 6.Nf3 Nf6 7.a4 Bb4 8.Bd3 0–0 9.0–0 b6; 5...e5 6.Nf3 Nf6 7.Bc4 Bc5 8.0–0 0–0 9.h3 d6) 6.Nf3 e5 7.Bc4 Bc5 8.0–0 0–0 9.h3 d6; C) 5.Nf3 Nf6 (5...d5 6.e3 Nf6 7.a4 g6 8.Nb5 Bg7 9.Bc3 Ra8; 5...e6 6.e3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4; 5...e5 6.e4 Nf6 7.Bc4 Bc5 8.h3 0–0 9.0–0 d6) 6.e3 e5 7.Nb5 d6 8.Be2 Be7 9.d4 e4.

4.Nc3 d5 A) 5.Nf3 d4 (5...Nc6 6.e3 Nf6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7; 5...Nf6 6.e3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4) 6.Ne4 Nc6 7.e3 de3 8.fe3 Nf6 9.Nf6 ef6; B) 5.e3 Nc6 (5...Nf6 6.Nf3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...Bd7 6.Nf3 Nf6 7.Be2 Nc6 8.0–0 e6 9.Ng5 Ng4; 5...e6 6.Nf3 Nc6 7.Bd3 Nf6 8.0–0 Bc5 9.Ne2 0–0; 5...h4 6.Nf3 h3 7.gh3 Nf6 8.Ne2 Nc6 9.Nf4 Qd6) 6.Nf3 Nf6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4.

4.Nc3 e6 A) 5.Nf3 Nf6 (5...Nc6 6.e3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4; 5...Be7 6.e4 Nc6 7.Bd3 Nf6 8.0–0 0–0 9.Qe2 Nb4; 5...h4 6.e4 Nc6 7.h3 Nf6 8.Bb5 Bc5 9.0–0 Nd4) 6.e3 Be7 7.Bd3 Na6 8.Nd4 Nb4 9.Bb5 Nc6; B) 5.e4 Nc6 (5...Nf6 6.Nf3 Nc6 7.a4 Be7 8.Bd3 0–0 9.0–0 Nb4; 5...Be7 6.Nf3 Nc6 7.Bb5 Nf6 8.0–0 0–0 9.Qe2 d6; 5...Bb4 6.a3 Be7 7.Nf3 Nc6 8.d4 d5 9.Bd3 de4) 6.Nf3 Nf6 7.a4 Be7 8.Bd3 0–0 9.0–0 Nb4; C) 5.h3 Nc6 (5...Nf6 6.Nf3 Nc6 7.e4 Bc5 8.e5 Nd5 9.Nd5 ed5; 5...Be7 6.Nf3 Nf6 7.e4 Nc6 8.Bb5 0–0 9.0–0 d5; 5...d5 6.e4 Nf6 7.ed5 ed5 8.Nf3 Bd6 9.Bb5 Bd7; 5...Bc5 6.Ne4 Nf6 7.Nc5 Rc5 8.e3 Nc6 9.Nf3 d6) 6.Nf3 Nf6 7.e3 Be7 8.Bd3 0–0 9.0–0 Nb4; D) 5.e3 Nf6 (5...Nc6 6.Nh3 Nf6 7.Be2 d5 8.0–0 e5 9.Ng5 Ng4; 5...h4 6.Nf3 Nc6 7.h3 Nf6 8.Be2 Be7 9.0–0 Rah5; 5...d5 6.Nf3 Nf6 7.Bd3 Nc6 8.0–0 Bc5 9.Ne2 0–0) 6.Nf3 Be7 7.Bd3 Nc6 8.0–0 0–0 9.Qe2 Nb4.

4.Nc3 Nf6 A) 5.e3 Nc6 (5...d5 6.Nf3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...d6 6.Nf3 Nc6 7.Bb5 g6 8.0–0 Bg7 9.h3 0–0; 5...e6 6.Nf3 Be7 7.Bb5 Nc6 8.0–0 0–0 9.Qe2 d5; 5...b6 6.Nf3 Nc6 7.Bc4 e6 8.0–0 Be7 9.Nb5 0–0) 6.Nf3 d5 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; B) 5.e4 d5 (5...Nc6 6.Nf3 e6 7.Bb5 Bc5 8.0–0 Nd4 9.Bd3 d6; 5...h4 6.Nf3 Nc6 7.h3 e6 8.Bb5 Bc5 9.0–0 Nd4; 5...e6 6.Nf3 Nc6 7.Bb5 Bc5 8.0–0 Nd4 9.Bd3 d6) 6.ed5 Nd5 7.Nf3 Nc6 8.Bc4 Be6 9.Bb3 Nf4; C) 5.Nf3 Nc6 (5...e5 6.e4 Nc6 7.Bc4 Bc5 8.0–0 0–0 9.h3 d6; 5...d5 6.e3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...e6 6.e3 Nc6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4) 6.e3 d5 7.a4 g6 8.Nb5 Bg7 9.Bc3 Ra8.

4.c4 Nc6 A) 5.Nf3 Nf6 (5...e5 6.Nc3 Nf6 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6) 6.Nc3 e5 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6; B) 5.e3 Nf6 (5...e5 6.Nc3 Be7 7.Nb5 Nf6 8.Nf3 e4 9.Ng5 0–0) 6.Nc3 e5 7.Nb5 Be7 8.Nf3 e4 9.Ng5 0–0; C) 5.Nc3 e5 (5...Nf6 6.Nf3 e5 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6) 6.Nf3 Nf6 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6.

4.c4 d6 A) 5.Nc3 Nf6 (5...h4 6.e3 Nf6 7.Nf3 h3 8.gh3 Bh3 9.Bh3 Rh3; 5...Na6 6.Nf3 Nf6 7.e3 Bd7 8.Be2 Nc5 9.d4 Nce4; 5...Nd7 6.Nf3 Ngf6 7.e3 h4 8.h3 Ne5 9.Be2 g6; 5...Nc6 6.Nf3 Nf6 7.Qb3 e5 8.e4 Nd7 9.Na4 Be7; 5...e5 6.Nf3 Nf6 7.Qb3 Be7 8.Nd5 0–0 9.Bc3 Ra8; 5...b6 6.Nf3 Nf6 7.g3 Nc6 8.Bg2 Be6 9.d3 g6) 6.Nf3 h4 7.e3 h3 8.gh3 Bh3 9.Bh3 Rh3; B) 5.e3 e5 (5...Nf6 6.Nf3 Nc6 7.Nc3 e5 8.Bd3 Qe7 9.Ng5 Nb4; 5...Nc6 6.Nc3 Nf6 7.Nf3 e5 8.Bd3 Qe7 9.Ng5 Nb4; 5...b6 6.Nc3 Nf6 7.Nf3 Nc6 8.Qb3 Bb7 9.Be2 Ne5; 5...Bf5 6.Nf3 Nf6 7.Nc3 Nc6 8.Qb3 Qc8 9.Be2 e6; 5...h4 6.Nc3 Nf6 7.h3 Nc6 8.Nf3 Rhh5 9.Be2 g6; 5...Bg4 6.Nf3 Nf6 7.Nc3 Na6 8.Be2 Nc5 9.0–0 Qd7) 6.Nf3 Nf6 7.Qc2 Be7 8.Nc3 0–0 9.Ng5 Nc6; C) 5.d3 Nf6 (5...Nc6 6.Nf3 Nf6 7.Nc3 e5 8.Qb3 Be7 9.g3 0–0; 5...e5 6.Nf3 Nc6 7.g3 Nf6 8.Bg2 Be7 9.0–0 0–0; 5...Bf5 6.Nf3 Nf6 7.Nc3 Nc6 8.Nb5 e5 9.e4 Bd7; 5...Bd7 6.Nc3 Na6 7.Nf3 Nf6 8.g3 Nc5 9.Bg2 g6; 5...h4 6.Nf3 Nf6 7.Nc3 Nc6 8.Qb3 Ra6 9.Rb1 Rh5; 5...Bg4 6.h3 Bd7 7.Nf3 Nf6 8.Qd2 Nc6 9.Nc3 e5) 6.Nf3 Nc6 7.Nc3 g6 8.g3 Bg7 9.Nb5 0–0; D) 5.Nf3 Nf6 (5...Nc6 6.Nc3 Ne5 7.Ne5 de5 8.Qc2 Nf6 9.e3 g6; 5...h4 6.Nc3 Nf6 7.e3 h3 8.gh3 Bh3 9.Bh3 Rh3; 5...b6 6.Bc3 Ra7 7.a4 Nf6 8.Na3 Ne4 9.Nb5 Nc3) 6.Nc3 Nc6 7.Qb3 e5 8.e4 Be7 9.Bd3 0–0.

4.c4 e6 A) 5.Nc3 b6 (5...Nf6 6.e3 Be7 7.Nf3 Nc6 8.Bd3 d5 9.0–0 0–0; 5...Nc6 6.Nf3 Nf6 7.e3 Be7 8.Bd3 d5 9.0–0 0–0; 5...Ra6 6.Nf3 Nf6 7.e3 Nc6 8.Bd3 Nb4 9.Be2 Be7; 5...Be7 6.Nb5 Nf6 7.e3 c6 8.Nd4 Na6 9.Ngf3 h4; 5...Na6 6.Nf3 Nf6 7.g3 Be7 8.Bg2 0–0 9.d4 d5; 5...Ra8 6.e3 Nc6 7.Nf3 Nf6 8.Bd3 Nb4 9.Be2 Be7) 6.Nb5 Nc6 7.Nf3 Nf6 8.e3 Bb7 9.a3 h4; B) 5.e3 Rh6 (5...h4 6.Nf3 Nf6 7.Nc3 Nc6 8.Nb5 Bc5 9.Be2 h3; 5...Nc6 6.Nc3 Nf6 7.Nf3 Be7 8.Bd3 0–0 9.Qb3 Nb4; 5...Nf6 6.Nc3 Be7 7.Nf3 Nc6 8.Bd3 0–0 9.Qb3 Nb4) 6.Nf3 Nc6 7.Nc3 Nf6 8.Nb5 Be7 9.Bc3 Ra8; C) 5.Nf3 Nf6 (5...Nc6 6.Nc3 Nf6 7.e3 Be7 8.Bd3 0–0 9.0–0 d5) 6.Nc3 Nc6 7.e3 Be7 8.Bd3 Nb4 9.Be2 0–0.

4.c4 Nf6 A) 5.Nc3 Nc6 (5...e5 6.Nf3 Nc6 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6; 5...d5 6.cd5 Nd5 7.Nd5 Qd5 8.Nf3 Nc6 9.e3 e5) 6.Nf3 d5 7.cd5 Nd5 8.Nd5 Qd5 9.e3 e5; B) 5.e3 Nc6 (5...e5 6.Nc3 Nc6 7.Nb5 d5 8.Nf3 e4 9.Ng5 Ng4; 5...d6 6.Nf3 Nc6 7.Nc3 Bf5 8.Qb3 b6 9.Be2 e6; 5...Na6 6.Nf3 d6 7.Bc3 Rc5 8.d4 Rc6 9.Bd3 h4; 5...d5 6.Nc3 Nc6 7.Nd5 Nd5 8.cd5 Qd5 9.Nf3 h4) 6.Nc3 e5 7.Nb5 Be7 8.Nf3 e4 9.Ng5 0–0; C) 5.Nf3 Nc6 (5...e6 6.Nc3 Nc6 7.e3 Be7 8.Bd3 0–0 9.0–0 d5; 5...b6 6.Nc3 Nc6 7.Nb5 e6 8.e3 Bb7 9.a3 h4; 5...d5 6.Bc3 Rc5 7.cd5 Nd5 8.Bd4 Ra5 9.e4 Nf6) 6.Nc3 e5 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6.

4.c4 h4 5.Na3 Nf6 (5...Nc6 6.Nf3 Nf6 7.Nb5 d6 8.Bc3 Ra6 9.Qc2 Rh5; 5...d6 6.Nb5 Nf6 7.Nf3 Nbd7 8.d3 Nc5 9.Qd2 Ra6; 5...d5 6.Nf3 Nf6 7.e3 Nc6 8.Nb5 h3 9.gh3 Bh3; 5...Na6 6.Nf3 Nf6 7.Nb5 Nc5 8.Qc2 d6 9.Bc3 Ra6) 6.Nb5 d6 7.Nf3 Nbd7 8.Bc3 Ra6 9.Qc2 Nc5.

4.c4 h4 5.Qb3 Nf6 (5...Nc6 6.Nf3 Nf6 7.Nc3 e6 8.Nb5 b6 9.e3 Bb7; 5...e6 6.Nc3 Nf6 7.Nf3 Nc6 8.e3 b6 9.h3 Bb7; 5...Na6 6.Nf3 Nc5 7.Qc2 Nf6 8.Nc3 b6 9.d4 Ne6; 5...d6 6.Nc3 Nd7 7.Nf3 Ngf6 8.d4 b6 9.h3 Bb7; 5...Ra6 6.Nf3 Nc6 7.Nc3 d6 8.e3 Rb6 9.Nb5 Rh5) 6.Nf3 Nc6 7.Nc3 e6 8.Nb5 b6 9.Bc3 Ra8.

4.c4 h4 5.Nc3 Nf6 (5...Nc6 6.Nf3 Nf6 7.e3 Rhh5 8.Qb3 e5 9.Nb5 Be7; 5...d6 6.Nf3 Nf6 7.e3 Nbd7 8.h3 b6 9.Be2 Bb7; 5...e6 6.Nf3 Nf6 7.Nb5 Nc6 8.e3 Rh5 9.Qb3 Ra6; 5...b6 6.Nb5 Nf6 7.Nf3 Nc6 8.e3 d6 9.Ng5 Bb7) 6.Nf3 d6 7.e3 Na6 8.h3 Bf5 9.Nd4 Bd7.

4.c4 h4 5.d4 e6 (5...d6 6.Nf3 Nf6 7.Nc3 Bf5 8.Qb3 Qc8 9.Rd1 Nc6; 5...Nf6 6.Nf3 e6 7.Nc3 Nc6 8.Qb3 Ra6 9.a3 Be7) 6.Nf3 g5 (6...d5 7.c5= (7.cd5 ed5 8.Ne5 Nf6 9.Qd2 c6) 7...Nf6 8.Nc3 Nc6 9.e3 Be7; 6...Nc6 7.d5 ed5 8.cd5 Nb4 9.e4 Qe7) 7.Bc3 (7.d5 Nf6 8.Qd2 b6 9.Ng5 Rh5) 7...c6 (7...Rf5 8.d5 Nf6 9.Nd4 Rf4) 8.Ba5+/– (8.c5 d6 9.Qd2 Ra8) 8...Qa5 9.Nfd2 (9.Nbd2 Nf6+/– (9...g4 10.Ne5 d6+/–)) 9...Bg7+= (9...c5–/+) 10.e3 c5 11.Be2?? (better is 11.Bd3+/–) 11...cd4–+ 12.0–0 d3! 13.Ne4? (13.Bd3 Ba1) 13...de2 (13...Ba1?! 14.Nd6 Kf8 15.Qd3–+) 14.Qe2 Ba1 15.Nd6 Kf8 16.Qf3 Nf6 17.Nc8 Qc7 18.Na7 g4 (better is 18...Be5!? 19.h3 b6 20.Nb5 Qc4 21.Nd4–+) 19.Qe2 Be5 20.Nb5 Bh2 21.Kh1 Qe5 22.f4 Qh5 (22...Qh5 23.Qb2 h3–+) 0–1. Perez Perez,Francisco Jose (2085) – Hernandez,Barbaro, Havana–ch sf region, 1998.

4.c4 h4 5.e3 Nf6 (5...d6 6.Nc3 Nf6 7.Nf3 h3 8.gh3 Na6 9.d4 Bh3; 5...Nc6 6.Nc3 Nf6 7.Nf3 d6 8.Qb3 h3 9.gh3 Rf5) 6.Nc3 d6 7.Nf3 h3 8.gh3 Bh3 9.Bh3 Rh3.

4.c4 h4 5.Nf3 Nf6 (5...Nc6 6.Nc3 d6 7.e3 Nf6 8.Qb3 h3 9.gh3 Rf5; 5...e6 6.Nc3 Nf6 7.Nb5 Nc6 8.e3 b6 9.Ng5 Bb7; 5...d6 6.Qb3 Nf6 7.Nc3 Nbd7 8.d4 b6 9.h3 Bb7) 6.Nc3 Nc6 7.e3 d6 8.Qb3 Rhh5 9.h3 Be6.

4.e3 Nc6 A) 5.Nf3 Nf6 (5...e5 6.Nc3 Nf6 7.Nb5 d6 8.c4 Bf5 9.Be2 Be7; 5...d5 6.Nc3 Nf6 7.a4 g6 8.Nb5 Bg7 9.Bc3 Ra8; 5...h4 6.Nc3 Nf6 7.h3 e5 8.Nb5 d6 9.Be2 Bf5) 6.Nc3 e5 7.Nb5 d6 8.Be2 Be7 9.0–0 0–0; B) 5.Nc3 e6 (5...d5 6.Bb5 Nf6 7.Nf3 e6 8.Ne5 Bd7 9.Nd7 Qd7; 5...Nf6 6.Nf3 e5 7.Nb5 d6 8.Bc4 e4 9.Nfd4 Ne5; 5...e5 6.Nf3 Nf6 7.Nb5 d6 8.Be2 Be7 9.0–0 0–0) 6.Nf3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4.

4.e3 d5 A) 5.Nc3 Nf6 (5...Nc6 6.Bb5 Nf6 7.Nf3 e6 8.Ne5 Bd7 9.Nd7 Qd7; 5...Bd7 6.Be2 Nf6 7.Nf3 Nc6 8.0–0 e6 9.Ng5 Be7; 5...h4 6.h3 Nf6 7.Nf3 Bd7 8.Be2 Nc6 9.0–0 e5; 5...e6 6.Nf3 Nf6 7.Bd3 Nc6 8.0–0 Bc5 9.Ne2 0–0) 6.Nf3 Nc6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7; B) 5.Be2 Nf6 (5...Nc6 6.Nf3 Nf6 7.0–0 g6 8.Na3 Bg7 9.Nb5 0–0) 6.Nf3 Nc6 7.0–0 g6 8.d4 Bg7 9.Nbd2 0–0; C) 5.Nf3 Nc6 (5...Nf6 6.Nc3 Nc6 7.Be2 g6 8.0–0 Bg7 9.Nb5 0–0; 5...e6 6.Bd3 Nc6 7.Nc3 Nf6 8.0–0 Bd7 9.e4 Bc5; 5...Bd7 6.c4 Ba4 7.Qc1 Nd7 8.cd5 Ngf6 9.Bf6 Nf6) 6.Nc3 Nf6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4.

4.e3 d6 A) 5.Nf3 Nf6 (5...Nc6 6.Nc3 Nf6 7.a4 e5 8.Bd3 d5 9.e4 Bb4; 5...Nd7 6.Nc3 Ngf6 7.Bc4 c6 8.0–0 b5 9.Bb3 b4) 6.Nc3 Nc6 7.Bb5 g6 8.d4 Bd7 9.0–0 Bg7; B) 5.Na3 Nc6 (5...Nf6 6.Nc4 Rc5 7.Bd3 Be6 8.Qe2 Nc6 9.Nf3 Nb4) 6.Nf3 Nf6 7.Be2 h4 8.h3 Bf5 9.0–0 e5; C) 5.Bd3 Nf6 (5...Nd7 6.Na3 Nc5 7.Nf3 d5 8.0–0 Nf6 9.Be2 c6; 5...Na6 6.Nf3 Nc5 7.Na3 Nf6 8.0–0 d5 9.Be2 c6; 5...Nc6 6.Nf3 Nb4 7.Be2 Nf6 8.Nc3 h4 9.h3 Bf5) 6.Nf3 Nc6 7.Nc3 Nb4 8.Bc4 d5 9.Be2 h4; D) 5.Bc4 Nc6 (5...d5 6.Bd3 Nf6 7.Nf3 Nbd7 8.Nc3 e5 9.Be2 Be7; 5...Nf6 6.Nf3 d5 7.Bd3 Nbd7 8.Nc3 e5 9.Be2 Be7; 5...Nd7 6.Nf3 Nb6 7.Bd3 Na4 8.Bd4 Nf6 9.0–0 Bd7; 5...h4 6.h3 Nf6 7.Nf3 d5 8.Be2 Nc6 9.Nc3 Bf5; 5...Rg5 6.Nf3 Rg2 7.Ne5 Rf2 8.Kf2 de5 9.Be5 Nh6) 6.Nf3 d5 7.Bd3 Nf6 8.0–0 Nb4 9.Bc3 Qd6; E) 5.h3 Nc6 (5...Nf6 6.Nc3 Nc6 7.Bb5 e5 8.Nf3 Be7 9.0–0 0–0; 5...Bd7 6.Nf3 Nf6 7.Nc3 Nc6 8.Bd3 Nb4 9.0–0 Nd3; 5...Na6 6.Nf3 Nf6 7.Nc3 Bd7 8.Be2 e5 9.0–0 Be7) 6.Nc3 Nf6 7.Nf3 Rh6 8.Bb5 Rg6 9.Nh4 Rh6; F) 5.Nc3 Nc6 (5...Nf6 6.Nf3 Nc6 7.Bb5 g6 8.0–0 Bg7 9.a4 0–0; 5...h4 6.Nf3 Nf6 7.h3 Nc6 8.Bc4 Bf5 9.0–0 e5; 5...Bd7 6.Nf3 Nf6 7.Be2 Nc6 8.0–0 h4 9.h3 Ne5; 5...Nd7 6.Nf3 Ngf6 7.d4 Nb6 8.Bd3 Be6 9.0–0 Nc4; 5...Na6 6.Nf3 Nf6 7.Be2 Bd7 8.0–0 Nc5 9.Nd4 Ra8) 6.Bb5 g6 7.Nge2 Nf6 8.Nd4 Bd7 9.Nb3 Ra8.

4.e3 e6 A) 5.Nf3 Nc6 (5...Nf6 6.Bd3 Nc6 7.Nc3 Be7 8.0–0 0–0 9.Ne4 Nb4; 5...h4 6.Nc3 Nc6 7.h3 Nf6 8.Be2 Be7 9.0–0 Rah5; 5...d5 6.Bc3 Ra8 7.Be5 Nf6 8.Nc3 Nc6 9.Bb5 Bd6) 6.Nc3 Be7 7.Bd3 Nf6 8.0–0 0–0 9.Ne4 Nb4; B) 5.Bd3 Nf6 (5...Nc6 6.Nf3 Nf6 7.Nc3 Be7 8.0–0 0–0 9.Ne4 Nb4; 5...Na6 6.Nf3 Nf6 7.Nc3 Be7 8.Nd4 Nb4 9.Bb5 Nc6; 5...h4 6.Nc3 Nf6 7.Nf3 Nc6 8.h3 b6 9.a3 Ba6; 5...b6 6.Nc3 Nc6 7.Nf3 Nf6 8.0–0 Bb7 9.Nb5 Nb4; 5...Nh6 6.Nc3 Nc6 7.Nf3 Be7 8.Nb5 0–0 9.0–0 d5; 5...d5 6.Nf3 Nc6 7.Nc3 Nf6 8.0–0 Bc5 9.Ne2 0–0) 6.Nf3 Be7 7.Nc3 Nc6 8.0–0 0–0 9.Ne4 Nb4; C) 5.Be2 Nf6 (5...Nc6 6.Nc3 Nf6 7.Nh3 d5 8.d4 Bd6 9.0–0 0–0; 5...b6 6.Nh3 Nc6 7.Nc3 Nf6 8.Nb5 Ne4 9.Nf4 Ba6; 5...Nh6 6.Nc3 Nc6 7.Nb5 Nf5 8.Nf3 Bc5 9.0–0 d5) 6.Nc3 Nc6 7.Nh3 d5 8.Nb5 Ne4 9.f3 Nd6; D) 5.Nh3 Nf6 (5...Nc6 6.Nc3 Nf6 7.Be2 d5 8.0–0 e5 9.Ng5 Ng4) 6.Nc3 Nc6 7.Bb5 b6 8.0–0 Bd6 9.f4 0–0; E) 5.Nc3 Nc6 (5...Nf6 6.Bd3 Nc6 7.Nf3 Be7 8.0–0 0–0 9.Qe2 Nb4; 5...d5 6.Nf3 Nc6 7.Bd3 Nf6 8.0–0 Bc5 9.Ne2 0–0; 5...h4 6.Nf3 Nc6 7.h3 Nf6 8.Be2 Be7 9.0–0 Rah5; 5...b6 6.Nf3 Nc6 7.Bd3 Nf6 8.a3 Ba6 9.Ba6 Ra6; 5...Be7 6.Nh3 Nc6 7.Bb5 Nf6 8.0–0 b6 9.d4 Bb7) 6.Nf3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Ne4 Nb4.

4.e3 Nf6 A) 5.Nf3 Nc6 (5...d5 6.Nc3 Nc6 7.a4 g6 8.Bb5 Bg7 9.Nd4 Bd7) 6.Nc3 e5 7.Bb5 Be7 8.0–0 d6 9.Qe2 0–0; B) 5.Be2 Nc6 (5...e5 6.Nc3 Nc6 7.Nb5 d6 8.Nf3 Be7 9.0–0 0–0; 5...h4 6.Nf3 h3 7.g3 Nc6 8.Na3 d5 9.Nb5 Ne4; 5...e6 6.Nh3 Nc6 7.Nc3 d5 8.0–0 e5 9.Ng5 Ng4) 6.Nf3 e5 7.Nc3 Be7 8.0–0 e4 9.Nd4 Nd4; C) 5.Nc3 Nc6 (5...e5 6.Nf3 Nc6 7.Bb5 Be7 8.0–0 0–0 9.a4 d6; 5...d5 6.Nf3 Nc6 7.a4 e6 8.Nb5 Ne4 9.Be2 h4) 6.Nf3 e5 7.Bb5 Be7 8.0–0 0–0 9.a4 d6.

4.Nf3 Nc6 A) 5.e3 d6 (5...Nf6 6.Nc3 d5 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...d5 6.a4 Nf6 7.Nc3 e5 8.Nb5 e4 9.Ne5 Bb4; 5...e6 6.Nc3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5; 5...h4 6.h3 e6 7.Be2 Nf6 8.Nc3 Be7 9.0–0 Rah5; 5...e5 6.Nc3 Nf6 7.Bb5 Bc5 8.0–0 0–0 9.d4 ed4) 6.Nc3 Nf6 7.Bc4 d5 8.Bb5 e6 9.Ne5 Bd7; B) 5.Na3 d5 (5...d6 6.e3 Nf6 7.Be2 Bf5 8.0–0 h4 9.h3 Qd7; 5...Nf6 6.e3 d5 7.Nb5 e6 8.Be2 Be7 9.Bc3 Ra8) 6.e3 Nf6 7.Nb5 Ne4 8.Be2 e6 9.0–0 h4; C) 5.a4 Nf6 (5...e5 6.Nc3 Nf6 7.e4 Bc5 8.Bc4 0–0 9.h3 d6; 5...e6 6.Nc3 Nf6 7.e3 Be7 8.Bd3 Nb4 9.0–0 0–0; 5...h4 6.Nc3 Nf6 7.h3 Nb4 8.e3 e6 9.Be2 b6; 5...d6 6.e3 Nf6 7.Bb5 Bd7 8.0–0 e6 9.Ng5 d5; 5...d5 6.e3 Nf6 7.Nc3 e5 8.Nb5 e4 9.Ne5 Bb4) 6.Nc3 e5 7.e4 Bc5 8.Bc4 d6 9.0–0 0–0; D) 5.Nc3 Nf6 (5...e6 6.e3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5; 5...d5 6.e3 Nf6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...d6 6.e3 Nf6 7.Bb5 g6 8.0–0 Bg7 9.a4 0–0; 5...h4 6.e3 Nf6 7.h3 e6 8.Be2 b6 9.0–0 Bb7) 6.e3 e6 7.Bd3 Nb4 8.Be2 Bc5 9.d4 Be7.

4.Nf3 d5 A) 5.Nc3 Nf6 (5...Nc6 6.e3 Nf6 7.a4 g6 8.Nb5 Bh6 9.Bd3 0–0) 6.e3 Nc6 7.a4 g6 8.Bd3 e5 9.Bb5 Bd6; B) 5.a4 Nf6 (5...Nc6 6.Nc3 Nf6 7.e3 g6 8.Nb5 Bh6 9.Ne5 0–0; 5...h4 6.e3 Nf6 7.h3 Nbd7 8.Nc3 Nc5 9.Be2 g6; 5...e6 6.Na3 Nc6 7.e3 Nf6 8.Nb5 Bc5 9.Be2 h4; 5...Nd7 6.e3 Ngf6 7.Be2 Nb6 8.Nc3 Bg4 9.0–0 Bf3; 5...Rh6 6.e3 Nf6 7.Nc3 Nc6 8.Be2 e6 9.0–0 Be7; 5...Bd7 6.c4 Nf6 7.cd5 Nd5 8.e4 Nb4 9.Qb3 N8c6) 6.e3 Nc6 7.Nc3 e6 8.Nb5 Bb4 9.Bd3 0–0; C) 5.e3 Nf6 (5...Nc6 6.Nc3 Nf6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7) 6.Nc3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4.

4.Nf3 d6 A) 5.Na3 Nf6 (5...Nd7 6.Nc4 Ra4 7.e3 Ngf6 8.c3 b5 9.Na3 c6; 5...Na6 6.Nc4 Ra4 7.e4 Nf6 8.e5 Nd5 9.Ng5 f6; 5...Nc6 6.e3 Nf6 7.Be2 h4 8.h3 Bf5 9.0–0 Qd7; 5...d5 6.e3 Nc6 7.Nb5 Nf6 8.c4 Bf5 9.Bf6 ef6) 6.e3 Nc6 7.Be2 Bf5 8.0–0 h4 9.h3 e5; B) 5.Nc3 Nc6 (5...Nf6 6.e4 Nc6 7.Be2 e6 8.0–0 Be7 9.h3 0–0; 5...h4 6.e4 h3 7.d4 Nf6 8.e5 hg2 9.Bg2 Nh5) 6.e4 Nf6 7.Be2 e6 8.0–0 Be7 9.d4 0–0; C) 5.g3 Nf6 (5...Nc6 6.Nc3 Nf6 7.Bg2 h4 8.Nh4 g5 9.Nf3 Bh3) 6.Nc3 Nc6 7.Bg2 h4 8.Nh4 g5 9.Nf3 Bh3; D) 5.h3 Nc6 (5...Nf6 6.Nc3 Nc6 7.e3 g6 8.Bb5 Bg7 9.0–0 0–0; 5...Na6 6.Nc3 Nf6 7.e3 Bd7 8.Be2 e5 9.0–0 Be7; 5...Nd7 6.Nc3 Ngf6 7.e3 Nc5 8.Nd4 c6 9.Be2 g6; 5...Bd7 6.Nc3 Nf6 7.e3 Nc6 8.Bb5 e5 9.0–0 Be7) 6.e3 Nf6 7.Nc3 g6 8.a4 Bg7 9.Bb5 0–0; E) 5.a4 Nf6 (5...Nc6 6.Nc3 Nf6 7.e4 g6 8.Nb5 Bh6 9.Bd3 0–0; 5...Nd7 6.Nc3 Ngf6 7.e3 Nc5 8.Be2 Bd7 9.0–0 h4; 5...Bd7 6.e3 Nf6 7.Nc3 Nc6 8.Nb5 e5 9.Be2 Be7; 5...h4 6.e3 Nf6 7.Na3 Nbd7 8.Bd4 e5 9.Bc3 Ra8) 6.e3 Bd7 7.Nc3 Nc6 8.Nb5 e5 9.Bc3 Ra8; F) 5.e3 Nc6 (5...Nf6 6.Nc3 Nc6 7.h3 g6 8.Bb5 Bg7 9.0–0 0–0) 6.Nc3 Nf6 7.Bb5 g6 8.0–0 Bg7 9.a4 0–0.

4.Nf3 e6 A) 5.e4 Nc6 (5...Nf6 6.e5 Nd5 7.Nc3 Nc6 8.Nd5 ed5 9.Be2 Bb4; 5...h4 6.Nc3 Nc6 7.h3 Nf6 8.Bd3 Nh5 9.0–0 Be7) 6.Nc3 Nf6 7.Bb5 Bc5 8.0–0 Nd4 9.Bd3 d6; B) 5.e3 Nc6 (5...Nf6 6.Nc3 Nc6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5; 5...d5 6.Nc3 Nc6 7.Bd3 Nf6 8.0–0 Bc5 9.Ne2 0–0) 6.Nc3 Nf6 7.Bd3 Nb4 8.Be2 b6 9.a3 Nc6; C) 5.a3 Nc6 (5...Nf6 6.e3 Be7 7.Nc3 0–0 8.d4 Nc6 9.Bd3 b6; 5...b6 6.Nc3 Nc6 7.e3 Nf6 8.Bd3 Bb7 9.Nb5 Na7; 5...Nh6 6.Nc3 Nc6 7.e4 Be7 8.h3 0–0 9.Bd3 d5) 6.e3 Nf6 7.Nc3 Bc5 8.d4 Be7 9.Bd3 0–0; D) 5.a4 Nf6 (5...Nc6 6.Nc3 Nf6 7.e3 Be7 8.Nb5 0–0 9.Be2 Ne4; 5...d5 6.e3 Nc6 7.Bd3 Nf6 8.Nc3 e5 9.Be2 e4) 6.Nc3 Nc6 7.e4 d5 8.e5 Ne4 9.Bb5 Bb4; E) 5.h3 Nc6 (5...Nf6 6.Nc3 Nc6 7.e3 Be7 8.Bb5 0–0 9.0–0 b6; 5...Rb5 6.Bc3 Nc6 7.e3 Rf5 8.d4 h4 9.Bd3 Rfh5; 5...d5 6.e3 Nc6 7.Nc3 Be7 8.Ne2 Nf6 9.Ned4 0–0; 5...b6 6.Nc3 Nc6 7.e4 Nf6 8.Bc4 Be7 9.0–0 0–0) 6.e3 Nf6 7.Nc3 Be7 8.Bd3 0–0 9.0–0 d5; F) 5.Nc3 Nf6 (5...Nc6 6.e3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5; 5...Be7 6.e3 Nc6 7.Bd3 Nf6 8.0–0 0–0 9.a3 d5; 5...h4 6.e3 Nf6 7.h3 Nc6 8.Be2 Be7 9.0–0 Rah5) 6.e3 Nc6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5.

4.Nf3 Nf6 A) 5.Nc3 d5 (5...Nc6 6.e3 d5 7.a4 g6 8.Bb5 Bg7 9.Nd4 Bd7; 5...e6 6.e3 Nc6 7.a3 d5 8.Nb5 Bc5 9.Bf6 gf6; 5...d6 6.e3 Nc6 7.Bb5 g6 8.Nd4 Bd7 9.Nb3 Ra8; 5...Na6 6.e3 d6 7.Be2 Nb4 8.0–0 h4 9.h3 Bf5) 6.e3 Nc6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7; B) 5.e3 e6 (5...Nc6 6.Nc3 e6 7.Bb5 b6 8.0–0 Bb7 9.Qe2 Bd6; 5...d6 6.Nc3 Nc6 7.Bb5 g6 8.0–0 Bd7 9.d4 Bg7; 5...d5 6.Nc3 Nc6 7.Be2 g6 8.0–0 Bg7 9.Nb5 0–0; 5...h4 6.Nc3 h3 7.gh3 Nc6 8.Nb5 d5 9.Bc3 Ra8; 5...g6 6.Na3 d5 7.c4 Bg7 8.Nb5 c6 9.Nbd4 0–0) 6.Nc3 Nc6 7.Bd3 Nb4 8.Be2 Be7 9.0–0 0–0.

3.d3 b6

4.Bd2 Ra8 5.Nc3 Bb7 6.e3 Nc6 7.Nf3 g6 8.Be2 Bg7 9.d4 Nf6 10.0–0 0–0 11.g3 e6 12.Bd3 Ba6 13.Ba6 Ra6 14.Qe2 Ra8 15.Ne1 Na5 16.Ng2 (16.e4 d5 17.Bg5 de4 18.Ne4 Nc6=) 16...d5–/+ 17.Nf4 c5 18.dc5 bc5 19.h4 (19.f3 Nc4–/+) 19...Nc4 20.Be1? (20.Rab1 Na3 21.Rbc1 Qd6–+) 20...Nd6 (20...Ne4 21.Ne4 Ba1 22.Nc5 Ra2 23.Nfe6 fe6 24.Ne6–+) 21.h5 Nfe4 22.Ne4 Ba1 23.Nd6 Qd6 24.hg6 hg6 25.Qg4 Bg7 26.Nh3 Qe7 27.Ng5 f5 28.Qh4 Rf6 29.Qh7 Kf8 30.Bc3 e5 31.f4 d4 32.ed4 ed4 33.Ba1?? Ke8 34.Qg8 Rf8 35.Qd5–/+ Rd8?? 36.Qc6+/– Rd7 37.Qc8 Rd8= 38.Qc6 Rd7 39.Qc8 Rd8= 40.Qc6 ½–½. sunnyda – abaol, kurnik, 2012.

4.Bd2 Ra8 5.Nf3 Nc6 6.g3 Nf6 7.Nc3 (7.Bg2 Bb7=) 7...Bb7 8.Bg2 e6 9.0–0 Be7 10.Nb5 0–0 11.c4 Ba6 (11...d6 12.Qc2+=) 12.Bf4= Nh5? (better is 12...d6=) 13.Bc7+– Qe8? (better is 13...Qc8 14.Bb6 Qb7+–) 14.Nd6 Bd6 15.Bd6 Ne7 16.Qb3 Bb7 17.Qb4 Nc6 18.Qb6 Ba6 19.Ne5 Nf6 20.Nc6 dc6 21.Bf8 Qf8 22.Bc6 Qb8 23.Rab1 Qb6 24.Rb6 Ra7 25.Rb8 (25.Rb8 Bc8 26.Rc8 Ne8 27.Re8) 1–0. usingprogram (1930) – caracola, kurnik, 2011.

3.d3 e5

4.Bd2 Ra8 5.Nc3 d5 6.e4 d4 7.Nd5 c6 8.Nc3? dc3–+ 9.Bc3 Bc5 10.Be5 Qa5 11.Ke2 f6 12.Bb8 Rb8 13.Nf3 Nh6 14.e5 fe5 15.Ne5 Bd4 16.Nc4 Qc5 17.Qe1 0–0 18.Kd1 Ba1 19.Be2 Ra8 20.Qd2 Ra2 21.Bh5 Rf2 22.Qg5 Qg5 (23.Rf1 Rf1 24.Ke2 Qg2 25.Ke3 Nf5) 0–1. oracleinshadows (1725) – pcmvr (2110), net–chess.com, 2006.

4.Bd2 Ra8 5.e4 Bc5 6.Nf3 Nf6 7.Ne5= d5 8.Be2 de4=+ 9.Bg5?? Qd4–+ 10.Bf6 Qf2 11.Kd2 Be3 12.Kc3 Bd4 13.Kb3 Ba1 14.Na3 Qb6 15.Kc4 Be6 0–1. sburritt – pcmvr (2110), net–chess.com, 2006.

3.d4 d5

4.Qd2 Ra8 5.Nf3 e6 6.Nc3 Nf6 7.Qf4 Bd6 8.Qg5 0–0 9.Nb5 Be7 10.g3? Ne4 11.Qg4 c6 12.Nd2 cb5 13.Ne4 de4 14.Qe4 Ra4 15.Bb2 Nc6 16.Bg2 e5 17.d5 Re4 18.Be4 Nd4 19.c3 f5 20.cd4 fe4 21.0–0 Qd5 (22.de5 Qd2–+) 0–1. ajeffries (1645) – tomy (2260), net–chess.com, 2006.

4.Bd2 Ra8 5.Nc3 e6 6.e3= c5 7.Bb5 Bd7 8.Bd7 Nd7 9.dc5 Bc5 10.Nge2 Ngf6 11.0–0 0–0 12.Nf4 d4 13.ed4=+ Bd4 14.Rb1 b6 (15.Nfe2 Be5=+). ajeffries (1645) – nay (2190), net–chess.com, 2006.

4.Bd2 Ra8 5.Nf3 Bf5 6.Nc3 h6 7.Rb1 Nf6 8.Rb7 Qc8 9.Qb1 e6 10.g4 (10.Bf4!? Na6 11.e3+–) 10...Bg4 11.Ne5 Bf5? (better is 11...Nbd7=) 12.Nb5+– Na6? (better is 12...Bd6 13.Nf7! 0–0 14.Nbd6 cd6 15.Nd6 Qc6 16.Nf5 ef5+–) 13.Na7 Qd8 14.e4! Ne4 15.Qb5 Ke7 16.Nac6 Kf6 17.Nd8 Rd8 18.Qa6 Nd2 19.Kd2 Bd6 20.Qc6 Ra8 21.Rc7 Bc7 22.Qc7 Rhf8 23.Nd7 Kg6 24.Nf8 Rf8 25.Qe7 Ra8 26.Rg1 Kh7 27.Qf7 Rg8 28.Bd3 Bd3 29.Kd3 (29.Kd3 Kh8 30.Qg6 e5 31.de5 d4 32.a4 Re8 33.Qg7) 1–0. pierred (2765) – grahamtrue (2125), net–chess.com, 2011.

3.d4 Nf6

4.Nc3 Nc6 5.Bb2 g6 6.e4 d5 7.e5 Ne4 8.Ne4 de4 9.Bc4 Bh6 10.h3 0–0 11.Ne2 e3 12.f3 b5 13.Bb3 Ra6 14.f4 Bb7 15.Qd3 Nb4 16.Qe3 Bg2 17.Rh2 Bb7 18.Nc3 Qd7 19.Qf2 Rd8 20.Rd1 Nd5 21.Nd5 Bd5 22.Bd5 Qd5 23.a3 Qe4 24.Kf1 Bf4 25.Rg2 Qe5! 26.de5 Rd1 27.Qe1 Re1 28.Ke1 Kg7 29.Ke2 Re6 30.Kd3 Be5 31.Be5 Re5 32.Rg3 Rd5 33.Ke4 Rc5 34.c3 Rc4 35.Kd5 c6 36.Ke5 Ra4 37.h4 Rh4 38.Rd3 Ra4 39.Rd7 f6 40.Ke6 Re4 0–1. grahamtrue (2125) – pierred (2765), net–chess.com, 2011.

4.e3 d5 5.Bd2 Ra7 6.Nc3 Bf5 7.Be2 e6 8.Bb5 c6=+ 9.Ba4 Ne4–/+ 10.Ne4? Be4–+ 11.Bb3?? Bg2 12.Nf3 Bh1 13.Ne5 Qh4 14.Ke2 Qh5 15.Nf3 Bf3 16.Ke1 Bd1 17.c3 Qe2 0–1. ajeffries (1645) – pcmvr (2110), net–chess.com, 2006.

4.e3 e6 5.Nf3 c5 6.Bd2 Ra8 7.Bb5 Be7 (8.0–0 0–0+=). oasis – C_D_B7 (1615), chessHere.com, 2006.

4.Nf3 d5 5.e3 e6 6.Bd2 Ra8 0–1. Reichardt – Tejler,Anders, corr SOK–89–33, 1989.

3.d4 g6

4.Bd2 Ra7 5.e4 Bg7 6.Nc3 Nf6 7.e5+= Nh5? 8.g4+– Nc6 9.gh5 Nd4 10.Be3 Nf5? 11.Ba7 Be5 12.Qd3 b6 13.Nf3 Bb7 14.Ne5 Bh1 15.Bh3 Qa8 16.Qd7 Kf8 17.Bf5 gf5 18.0–0–0 Bf3 19.Nf3 Rg8 20.h6 Qe8 21.Qc7 (21...f6 22.Rd8+–) 1–0. smoothmovermovesagain – PeterRs, ChessWorld.net, 2006.

4.e4 d5 5.Bd2 Ra8 =.

4.Bf4 Bg7 5.e3 (5.e4 Nc6 6.Nf3 d5=) 5...Nf6 6.Nd2 (6.Nf3 d6=) 6...d6 7.Ngf3 0–0 (7...Nd5 8.Nb3 Ra7 9.Bg5=) 8.c4 b6 9.Be2 c5 10.0–0 Nh5 11.Rb1 Nf4–/+ 12.ef4 Bf5 13.Rb5 Ra2 14.Qb3 Ra6 15.Qe3 Nc6 16.dc5 bc5 17.Qb3 Nb4 18.Nh4 Bd7 19.Rb4 cb4 20.Qb4 Qb6 21.Qb6 Rb6 22.Ne4 f5 23.Ng3 Rfb8 24.h3 Rb1 25.Bd3 Rf1 26.Bf1 Rb1 27.Nf3 Be6 28.Kh2 Rc1 29.h4 Bc4 30.Bc4 Rc4 31.Ne2 Re4 32.Nfg1 e5 33.f3 Rc4 34.Nh3 ef4 35.Nef4 Be5 36.g3 Rc2 37.Ng2 h6 38.f4 Bf6 39.Ng1 d5 40.Kh3 Rc1 41.Kh2 d4 42.Nf3 d3 43.Ne3 Rc2! 44.Kh3 Rf2 45.Ne1 Re2 46.N1g2 d2 47.Nd1 Re1! 48.Nge3 Bd4 (49.Kg2 Be3–+) 0–1. Mathofer,Kurt – Arendt,Heinz (1935), Ruhr–ch Seniors 4th, 1997.

3.e3 Ra8

4.Bc4 d5!? 5.Bb5 c6 =+.

4.Bc4 e6 5.Bb2 d5 6.Bb3 Nf6 7.c4 c6 8.cd5= cd5 9.Nf3 Bd7 10.0–0 Nc6 11.d4 Bd6 12.Nbd2 0–0 13.Re1 Qe7 14.e4= de4 15.Ne4 Ba3 16.Nf6 Qf6 17.Bc3 Bb4 18.Bb2 Be1–+ 19.Qe1 Rfe8 20.Rb1 Qf4 21.d5 ed5 22.Qc3 d4 23.Qc4? Be6 24.Qb5 Bb3 25.Qb3 Na5 26.Qb5 Qc7 27.Bd4 Nc4 28.Qg5 f5 29.Nh4 Ra6 30.Nf5 Qf7 31.Bg7+= Rg6 32.Nh6+/– Kg7 33.Nf7 Rg5 34.Ng5 Re2 35.a4 b6 36.g3 Kg6 37.Nf3 h5? 38.Nd4 Rb2 39.Rb2 Nb2+/– 40.Nb5 Na4 41.Kg2 Kf5 42.f4 Ke4 43.h3 Kd5 44.g4+– hg4 45.hg4 Ke4 46.Kg3 Nc5 47.f5 Nd3? 48.Kh4 Ne5? 49.Kg5 Nf3 50.Kg6 Ne5 51.Kg7?? Ng4= 52.Nd6 Kd5 53.Nf7 b5=+ 54.Nh6 Ne5 55.f6+= b4 56.f7?? Nf7–+ (57.Ng4 b3–+) 0–1. revbodio – biffum, Live Game Caissa's Web, 2005.

4.Nf3 Nf6 =.

4.Nf3 g6 5.Be2 Bg7 6.c3 e6 7.0–0 Ne7 8.Bb2 0–0 9.Qc2 d5 10.c4 c6 11.Bg7 Kg7 12.d4 Bd7 13.Qb3 b6 14.Nbd2 c5 15.Rfb1 Ba4 16.Qb6 Qb6 17.Rb6 cd4 18.Nd4 dc4 19.Nc4 Nd7 20.Rb7 Nd5 21.Nb2 Nc5 22.Rb5 Bb5 23.Nb5 Rfb8 24.Nd1 Ra5 25.Nd4 Rba8 26.Bc4 Nb4 27.Nc3 Ncd3 28.Bb3 Nc5 29.Bc4 Ncd3 30.Bb3 Nb2 31.Kf1 h5 32.Ke2 e5 33.Nf3 f6 34.Nd2 Rc5 35.Nce4 Rc7 36.Nd6 Na4 37.Nb5 Rd7 38.Nc4 Nc5 39.Bc2 Nc2 40.Rc1 Nb4 41.a3 Nd5 42.Nb6 Nb6 43.Rc5 Ra3 44.h3 Rb3 45.Nc7 Nc8 46.Ne6 Kf7 47.Nc7 Ke7 48.Nd5 Ke6 49.Nf4 Kf5 0–1. exp2005 – m3011, kurnik, 2012.

3.e4 d6

4.d4 e5 5.Bd2 (5.Nf3 Nf6 6.Bd2 Ra7 7.Nc3 ed4 8.Nd4 Be7= 0.00; 5.de5 Re5 6.Nc3 Be7 7.Nf3 Rc5 8.Nd5 Nf6= 0.00) 5...Ra8 6.Nf3 ed4 7.Nd4 d5 8.ed5 Qd5 =.

4.d4 Nf6 5.Bd3 (5.Nc3 e5 6.de5 de5 7.Qd8 Kd8 8.Bd2 Nc6= –0.22) 5...e5 6.Bb2 (6.Nf3 Bg4= 7.d5 Be7 8.h3 Bh5= 0.09) 6...ed4+= 7.Bd4 Nc6 8.Bc3 Rg5 9.Qf3 (9.Kf1 Rc5+=) 9...Ne5 10.Be5 de5 11.Nd2 Bc5 12.Nh3 (12.h3 Rh5+=) 12...Rg6 (better is 12...Bg4 13.Ng5 Bf3 14.Ngf3 Qa8–/+) 13.0–0? (better is 13.c3–/+) 13...0–0 14.Kh1 (14.Nf4 ef4 15.e5 Ng4 16.Bg6 Qd2–+) 14...Bd4 15.Rab1 Bg4 16.Qg3 Nh5 17.Qg4 Rg4 18.Be2 Rh4 19.Nf3 Rh3! 20.gh3 Nf4 21.Nd4 Qd4 22.Bg4 Qe4 23.f3 Qc2 24.Rg1 f5 25.Rbc1 Qf2 26.Rcf1 Qa7 27.Bh5 Nh5 28.Ra1 Qe3 29.Rae1 Qf3 30.Rg2 Nf4 31.Reg1 Ng2 32.Rg2 Rd8 33.Kg1 Rd1# 0–1. opponent – pierre, internet, 2008.

4.Nf3 c5 5.d4 Nc6 6.Na3?? Ra3!–/+ 7.Ba3 Qa5 8.Qd2 Qa3 9.Bb5 Qb2 10.Bc6–/+ bc6 11.0–0 Nf6 12.Rfb1=+ Qa3 13.dc5? Ne4–+ 14.Qf4 Nc3 15.Re1 Qc5 16.Ng5 f5 17.Ne6 Be6 18.Re6 Ne4 19.Re1 Qd5 20.f3 Qe6 21.fe4 fe4 22.Re4 Qa2 23.Ra4 Qb1 24.Kf2 Qc2 25.Kg3 Qb3 26.Kh4 Qd5 27.Ra8 Kd7 28.Qg4 e6 29.Ra7 Ke8 30.Ra8 Kf7 31.Qf4 Qf5 32.Qf5 ef5 33.g4 fg4 34.Kg4 g6 0–1. Steve20 – PeterRs, ChessWorld.net, 2006.

4.Nf3 Nf6 5.Nc3 =.

4.Nf3 g6 5.d4+= Bg7 6.Bd3 c5 7.c3 Nf6 8.Qb3 0–0 9.0–0 cd4 10.cd4 Nc6 11.Bb2 Nd7 12.Nbd2+= Ra8 13.Nc4+/– Na5 14.Na5 Ra5 15.Bc3 Ra8 16.Bc4 Nb6= 17.Rab1 Nc4 18.Qc4 b5 19.Qb3 Ba6 20.Rfe1 Qd7 21.e5 de5 22.de5 Rfb8?? 23.Ng5 e6 24.Ne4 Bb7= 25.Qb5 Qb5 26.Rb5+= Be4 27.Rb8 Rb8 28.Re4 Rb1 29.Re1 Re1 30.Be1 Be5 31.Bb4 Bb8 32.a4+/– Ba7 33.a5+– f5 34.Bd2 e5 35.Be3 (35...Bb8 36.a6+–) 1–0. chessotka (1640) – StephenHilton (1615), internet, 2006.

3.e4 e5

4.Bc4 b5 5.Bb3 +=.

4.Bc4 Bc5 5.Qf3 (better is 5.d3=) 5...Nh6 (better is 5...Nf6+=) 6.d4+/– c6?? (6...d5 7.Bd5 c6 8.Bh6 cd5 9.Bg7 de4+/–) 7.Bh6+– d5 8.dc5 dc4 9.Bg7 Rg8 10.Qg3 (10.Qc3 Rg7 11.Qe5 Kf8 12.Qb8 Rg2+–) 10...Rc5 11.Nf3 f5 12.ef5 Bf5 13.Nc3 Bc2? 14.0–0?? Qd7? 15.Ne1 Rg7 16.Qe3 Bf5?? 17.Qc5 (17.Qc5 Qd4 18.Qa3+–) 1–0. Wall,Bill – Merlin84, chess.com, 2008.

4.d4 Bb4 5.c3= Bd6 6.Nf3 Nc6 7.de5 Be7 8.Be2 f6 9.ef6+/– gf6 10.0–0 h5 11.Nh4 Ne5 12.Bh5 Kf8 13.f4 Nc6? 14.Ng6 Kg7 15.Nh8 Kh8 16.Qg4 Ra4 17.Qh3 Bc5 18.Kh1 Re4 19.Bg6 Kg7 20.Qh7 Kf8 21.Qf7# 1–0. CSLewis – sirrad, ChessWorld.net, 2005.

4.Nf3 d6 5.d4= Bd7 (5...Nf6 6.Bd2 Ra8 7.Nc3=) 6.Bd3 (6.Bd2 Ra8+=) 6...Nf6 (6...ed4 7.Nd4 Qf6 8.Be3=) 7.0–0 (7.de5 de5 8.Bd2 Ra8 9.Ne5 Be6+/–) 7...Be7 (7...ed4 8.Nd4 Be7 9.Bd2=) 8.Bd2+= Ra8 (8...Ra4 9.Nc3 Ra5+=) 9.d5 (9.de5!? de5 10.Ne5+/–) 9...0–0 10.Nc3 Bg4 (10...Na6 11.Qe2=) 11.h3 (11.Rb1 b6=) 11...Bh5 12.Be2 (12.Rb1 Qc8=) 12...Nbd7 13.Ng5 (13.Be3 Nc5=) 13...Bg6+= 14.Bd3 h6 (14...Nc5 15.Re1+=) 15.Nf3= Nc5 The pressure on e4 grows 16.Re1 (16.Qe2 c6 17.dc6 bc6=) 16...Nd3 (16...c6 17.dc6 bc6 18.Qe2+=) 17.cd3= Ra6 18.Rb1 b6 (18...Qa8 19.Qb3 Rb8 20.d4=) 19.d4 Re8 (better is 19...Nd7!?=) 20.de5+/– de5 (20...Nd7 21.Bf4+/–) 21.Ne5+– Nh7 (21...Bd6!? 22.Ng6 fg6+/–) 22.Qe2 (22.Ng6 fg6 23.e5 Bc5+–) 22...Bd6 (22...Ra3 23.Ng6 fg6 24.Qc4+–) 23.Nf7! (worse is 23.Qa6 Be5 24.Qa4 Nf6+–) 23...Kf7 (23...Bf7 24.Qa6) 24.Qa6 (24.Qa6 Qh4 25.Nb5+–) 1–0. Kukel,Attila – Prochaczka,S, SVK–ch U12 Slovakia, 2000.

4.Nf3 Nf6 =.

4.f4 ef4 5.Nf3 Nc6 6.Bc4 d6 7.d4=+ Bg4 8.0–0 Be7 9.Bf4 Nf6 10.Nc3 0–0 11.Bb3 Re8= 12.Qd3 Bf8 13.Bg5 Be7= 14.Bd2 Ra8 15.Ng5 h6?? 16.Nf7 (16...Qb8 17.Nh6 Kh8 18.Ng4+–) 1–0. mluka (2220) – rhand (1985), net–chess.com, 2002.

3.e4 Nf6

4.Nc3 Nc6 =.

4.Nc3 e5 5.Bb2 Bc5 6.h3 c6 7.a3?? (better is 7.Qf3–/+) 7...Qb6–+ 8.Rb1 Bf2 9.Ke2 Bg1 10.Qe1 Bd4 11.Kd1 0–0 12.d3 d5 13.Kc1 Be3 14.Kd1 Qc5 15.ed5 cd5 16.Qe2 Nc6 17.Ke1 (17.g4–+) 17...Nd4 18.Qd1 Ra3 19.Ne2 (19.Be2–+) 19...Nf3! 20.gf3 (20.gf3 Bf2 Mate attack) 20...Bf2 21.Kd2 Qe3 0–1. grahamtrue (2125) – pierred (2765), net–chess.com, 2011.

4.Nc3 e5 5.a3 Nc6 6.Nf3 d5 7.ed5 Nd5 8.Nd5 Qd5 9.Be2 e4–/+ 10.Ng1 Bc5 11.d3? Qd4?? 12.Be3–/+ Qc3 13.Bd2 Qf6 14.Be3? Be3–+ 15.fe3 Qc3 16.Kf2 Rf5 17.Nf3 ef3 18.Bf3 Ne5 19.Qe2 Ng4 20.Kg3 Qe5 21.Kh3 Rh5 0–1. losertoo (1860) – pcmvr (2110), net–chess.com, 2006.

4.Nc3 e5 5.Bb2 Bc5 6.Nf3 Ng4 7.d4 ed4 8.Nd4 Qf6 9.Qg4=+ Bd4 10.Qg3 Rc5–/+ 11.Nd5 Rd5!–+ 12.ed5 Bb2 13.Qe3?? Kd8 14.d6 Bc3 15.Kd1 Qd6 16.Bd3 Ba1 17.Re1 Nc6 18.g3 Nb4 19.Re2 Na2 20.Ke1 Bd4 21.Qg5 Qf6 22.Qh5 Nc1 23.Rd2 Re8 24.Kf1 Nd3 25.cd3 Qc6 26.Kg1 Re1 0–1. rodnel – pcmvr (2110), net–chess.com, 2006.

4.Nc3 e5 5.Bc4 Ne4 6.Bf7 Kf7 7.Ne4 d5 8.Ng3 Qf6 9.Bb2 Nc6 10.h3 Bc5 11.Nf3 Re8 12.0–0 Kg8 13.Bc3 Ra4 14.Re1 Qg6 15.Ne5? (Better is 15.Kf1 e4 16.Qe2–/+) 15...Qg3–+ 16.Qf3 Qf3 17.Nf3 Rf8 18.Bg7 (18.h4–+) 18...Kg7 (19.c3 Bh3–+) 0–1. Stiller – pcmvr (2055), ChessWorld.net, 2003.

4.d3 Nc6 5.Qd2 e5 6.Nc3 d5 7.ed5 Nd4 8.Nf3 Bb4 9.Ne5? Nd5–+ 10.Bb2 Nc3 11.Bc3 Re5 12.Kd1 Bg4 13.f3 Nf3! 14.gf3 Bf3 15.Kc1 Bc3 16.Qc3 Qg5 17.Qd2 Re1 18.Kb2 Qd2 19.Re1 Qe1 20.Rg1 Qb4 21.Kc1 Qd4 22.Rg5 0–0 23.Kd2 Re8 24.Rf5 Qb4 25.Kc1 Re1 0–1. sbderkach (1680) – pcmvr (2110), net–chess.com, 2006.

4.d3 e5!? =+.

4.d3 g6 5.Bd2= Ra8 6.Nf3 Bg7 7.c3 d6 8.Be2 c5 9.0–0 Qb6 10.e5 Nfd7 11.ed6? Qb2–+ 12.de7? Qa1 13.Ng5 Qa2 14.Bf3 h6 15.Ne4 Ke7 16.Qe2 Qe6 17.Qd1 Kf8 18.Re1 Qb6 19.d4 cd4 20.cd4 Bd4 21.Bf4 Nf6 22.Bd6 Kg7 23.Nbd2 Ra1 24.Qe2 Re1 25.Qe1 Re8 26.Bb8 Ne4 27.Ne4 f5 28.Qd2 Re4 29.Be4 fe4 30.h3 e3 31.Qe2 ef2 (32.Kh2 Qe6–+) 0–1. 73DADDELDU37 – romain63, mySchach.de, 2005.

3.Nf3 e5

4.d4 ed4 5.Nd4 g6 (5...Nf6 6.Qd2 b6 7.Nc3=+) 6.Nb3 Ra8 7.Bb2 Nf6 8.e4 Qe7 9.N1d2 d6 10.Bd3 Bg7 11.0–0 0–0 12.Re1 Be6 13.Nd4 Bg4 (< 13...Ba2 14.Bc4 Bc4 15.Ra8+/–) 14.f3 Bd7 15.Nc4 Qd8 16.e5 de5 17.Ne5 Bc8 18.Bc4 Nbd7? 19.Nf7 Rf7 20.Ne6 Qe7 21.Nc7 Qc5= 22.Kh1?? Qc7–+ 23.Bf7 Kf7 24.Bf6 Nf6 25.Qd3 Be6 26.f4 Rd8 27.Qa3 Rd2 28.f5?? Ng4 29.fe6 Kf6?? 30.Rf1? Rf2 31.Qb2?? Ke6 32.Rae1=+ Kf5 33.Qb5+– Be5 34.Qd3 Kf6 35.h3 Qc6 36.Re4?? Rf1 37.Qf1+– Ke6 38.Rc4 Qe8 39.hg4 Qd8 40.g5 Qg5 41.Rb4?? Qh5–+ 42.Kg1 Bh2 43.Kf2 Qc5 44.Ke2 Qb4 45.Qd1 Qg4 46.Ke1 Bg3 47.Kd2 Bf4 48.Ke1 Qh4 49.Ke2 Qg4 50.Ke1 Qd1 51.Kd1 h5 52.c4 g5 53.Kc2 h4 54.a4 g4 55.Kd3 h3 0–1. pinecrest1981 – j08, Live Game Caissa's Web, 2004.

4.e3 Nf6 5.Be2 Be7 6.0–0 0–0 7.Nc3 Re8 8.Bb2 Nc6 9.h3 e4 10.Nh2 d5 11.Nb1 d4–/+ 12.ed4 Nd4 13.Bc4 Bd6 14.Nc3 Bh2 15.Kh2 Nf3! 16.gf3 Qd7 17.Ne4 Qh3 18.Kg1 Rh5 19.Ng3 Qh2 0–1. kostaspetidis (2105) – pcmvr (2110), net–chess.com, 2006.

4.e4 Nf6 5.Bc4 Ne4–/+ 6.d3 Bb4 7.Bd2 Nd2–+ 8.Nfd2 d5 9.Bb3 Qf6 10.0–0 0–0 11.c3 Bd6 12.Nf3 e4 13.Nd4 c5 14.Ne2 c4! 15.dc4 dc4 16.Bc4 Bh2! 17.Kh2 Rh5 18.Kg1 Qh4 19.f3 e3 20.Qd4 Qh2 0–1. guerino (2100) – pcmvr (2110), net–chess.com, 2006.

4.e4 Nf6 5.d3 d5 6.ed5 Nd5 7.Bd2 Ra8 8.Ne5 Bc5 9.Qe2 0–0 10.Qd1?? Qf6 11.Nf3 Re8 12.Be2 Qa1 13.0–0 Nc6 14.Nc3 Qc3! 15.Bc3 Nc3 16.Qd2 Ne2 17.Kh1 Ra2 18.Re1 Bf2 19.Re2 Ra1 20.Ne1 Re2 21.Qe2 Re1 22.Qe1 Be1 23.g3 b5 (24.Kg2 Nd4–+) 0–1. iboyd (1950) – pcmvr (2110), net–chess.com, 2006.

3.Nf3 Nf6

4.Bb2 e6 5.e3 Be7 6.Be2 0–0 7.0–0 d5 8.d3 c5 9.Nbd2 b5 10.c4 bc4 11.dc4 Nc6 12.Nb3 Ra7 13.cd5 ed5 14.a3 Ne4 15.h3 Qd6 16.Nbd2 Qg6 17.Ne5 (17.Kh1!?–/+) 17...Ne5–+ 18.Be5 Bh3 19.Bf3 Ng5 20.Bd5 Rd7 21.gh3? (better is 21.Nf3 Rfd8 22.Ng5 Bg5 23.Qf3 Rd5 24.Qh3 Re5 25.f4 Bf4 26.ef4–+) 21...Rd5 (21...Nh3?! 22.Kh2 Rd5 23.f4–+) 22.Bg3 (22.Kh1–+) 22...Rd2! (22...Nh3?! 23.Kg2 Rfd8 24.Ra2–+) 23.Qg4 (23.Qd2 Nf3 Double attack (23...Nf3 Decoy)) 23...h5 24.Qf4 (24.Qc4 Ne4 25.Qe4 Qe4–+) 24...Nh3 (24...Nh3 25.Kh2 Nf4 26.Bf4 Bh4–+) 0–1. Hovla1 – PeterRs, ChessWorld.net, 2015.

4.Nc3 e5 5.e4 Bb4 6.Bb2 0–0 7.a3 Bc5 8.Bc4 (8.Ne5 Re8 9.d4 Bd4 10.Nf7 Ne4 11.Qd4 Nf6 12.Be2 Kf7=) 8...d6 9.Ng5 (better is 9.d4!? ed4 10.Nd4=+) 9...Bf2!–/+ 10.Kf2 Ng4 11.Kg1 Qg5 12.Qf3 (12.Qe2!?–/+) 12...Qd2–+ 13.Nd5 Rd5 (13...Qc2 14.Qe2 Qe2 15.Be2–+) 14.Bd5 Qa5 15.Bc3?? (better is 15.Bb3–+) 15...Qc5 16.Kf1 Ne3 17.Ke2 (17.Ke1 Qc3 18.Kf2 Nd5 19.ed5 Qc2 20.Ke1–+) 17...Bg4 (17...Qc3?! 18.Qe3 Qc2 19.Kf3–/+; 17...Nc2 18.Rac1 Bg4 19.Rc2 Bf3 20.Kf3–+) 18.Bb4 Bf3 19.Kf3 Qd4 20.Bb7 Nc2 21.Rad1 Qe3 22.Kg4 Qf4 (23.Kh3 Ne3 24.Bc8 Rc8 25.Bd6 Qg4) 0–1. gdraper (1715) – pcmvr (1700), net–chess.com, 2006.

4.d4 e6 5.Bd2 Ra8 6.Nc3 b6 7.e4 Bb7 8.Bd3 Be7 9.0–0 d6 10.Qe2 0–0 11.e5 de5 12.de5 Nfd7 13.Rfd1 Qc8 14.Bg5 Re8 15.Be4 Nc5 16.Bb7 Qb7?? (better is 16...Nb7 17.Qe4 Bc5+=) 17.Be7+– Nc6 (17...Nbd7 18.Bc5 Nc5 19.Rd2+–) 18.Bc5 bc5 19.Rab1 Qa7 20.Qe4 Ne7 21.Ng5 Ng6 22.Rd7 Rf8 23.a4 h6 (23...Rab8+–) 24.Ne6 Rfe8 25.Nc7 Re5 (25...Ne5 26.Ne8 Nd7+–) 26.Qa8 Qa8 27.Na8 1–0. usingprogram – gargantuel21, internet, 2011.

3.Nf3 g6

4.Bb2 f6 5.Nc3 Bg7 6.e4 Nc6 7.Nb5 e6 8.Bd3 d6 9.Bc3 Ra8 10.Qe2 Bd7 11.Bc4 Ke7 12.0–0 Kf8 13.Nbd4 Qe7 14.Nc6 Bc6 15.Rfb1 Qd7 16.Nd4 Re8 17.f4 e5 18.fe5 de5 (better is 18...fe5 19.Nc6 bc6+–) 19.Bb4 Re7 20.Ne6 Ke8 21.Be7 Qe7 22.a4 (22.Ng7?! Qg7 23.a4 Qd7+–) 22...Nh6 23.a5 Bf8 24.a6 ba6 25.Rb8 Kd7 26.Ra6 Nf7 27.Qd3 Nd6 28.Nc5 1–0. pierred (2765) – grahamtrue (2125), net–chess.com, 2011.

4.Bb2 Nf6 5.g3 Bg7 6.Bg2 0–0 7.0–0 d6 8.Bc3 Ra7 9.d3 c5 10.Nbd2 b5 11.a3 Bb7 12.Qb1 Qb6 13.e4 Nbd7 14.Re1 Rfa8 15.Qb2 e6 16.Reb1 Bc6 17.e5 Nd5–/+ 18.Ne4 Nc3–+ 19.Qc3? Ne5 20.Qb3 c4 21.Qc3 Nf3 (22.Bf3 Bc3 23.Nc3 cd3 24.cd3 Bf3 25.Nb5 Ra5–+) 0–1. Skean Du – PeterRs, ChessWorld.net, 2006.

2.ba5 b5

3.Bb2 c6 4.Bc3 Na6 5.g3 Bb7 6.Bg2 Qa5?? 7.Ba5+– Nc7 8.Bc7 Rc8 9.Ba5 d6 10.Nf3 Nf6 11.0–0 c5 12.d4 Bc6 13.dc5 dc5 14.Ne5 Nd5 15.Nc6 Rc6 16.Qd5 e6 17.Qd8 1–0. tomy (2255) – idontknow, net–chess.com, 2006.

3.d4 c6 4.Bd2+= Na6 5.a4 Qa5?? 6.Ba5+– Bb7 7.Nf3 Nc7 8.Bc7 Rc8 9.Bb6 Ba6 10.e3 Rb8 11.a5 Rb6 12.ab6 d6 13.Ra6 e6 14.b7 Be7 15.b8Q Kd7 16.Ra7 1–0. hsingletary (2135) – idontknow, net–chess.com, 2006.

3.d4 Nf6 4.Nf3 =.

3.ab6 cb6

4.Bb2 Na6 5.e4 Bb7 6.Nc3 Qc7 7.d4 0–0–0? 8.Nf3 e6 9.a4 Bb4+/– 10.Qd2 Nf6= 11.Bd3 Rhe8 12.e5 Ne4 13.Be4 f6?? 14.Bb7+– Qb7 15.0–0 fe5 16.Ne5 Rf8 17.Qe3 Rf6 18.Nb5 Qd5 19.c4 Qa8 20.Rac1 d6 21.c5 de5 22.cb6 Kb8 23.Qe5 Kb7 24.Rc4 Rf5 25.Qe6 Bf8 26.Rfc1 g6 27.Rc7! Kb8 28.Rc8 Kb7 29.Qc6 1–0. alaamattar (2165) – idontknow, net–chess.com, 2006.

4.Nf3 +/–.

2.ba5 c5

3.Bb2 Qa5 4.Bc3 Qa4 5.e3 Nc6 6.Nf3 d5 7.Be2 Bf5 8.d3 d4 9.ed4 cd4 10.Bb2?? (better is 10.Bd2+=) 10...Qb4–+ 11.Nbd2 Qb2 12.Rb1 Qa2 13.Rb7 Nf6 14.0–0 Nd5 15.Re1 (15.Ne4 e6–+) 15...e6 16.Qb1 Bb4 17.Qa2 Ra2 18.Bd1 0–0 19.h3 e5! 20.g4 (20.Ne5 Bd2 Deflection) 20...Be6 21.Rb4 Ndb4 22.Ne5 Ne5 23.Re5 Ra1 24.Re1 Nc2! 25.Rf1 (25.Bc2 Re1 Pinning (25...Re1 Deflection)) 25...Nb4 26.Be2 (26.Nf3 Nc6–+) 26...Ra2 27.Rd1 Nd5 0–1. mckenna215 – EytonWiener, ChessWorld.net, 2015.

3.Bb2 Nc6 4.Nf3 d6 5.e3 Na5 6.d4 c4 7.d5 b5 8.a3 Nf6 9.Nc3 Bd7 10.Nd4 Qb6 11.Be2 g6 12.0–0 Bg7 13.Bf3 0–0 14.Rb1 Nb7 15.Ncb5 Nc5 16.Nc3 Qa6 17.Nc6 Nd5 18.Nd5 Rfe8 19.Nce7 Kf8 20.Nc7 Re7 21.Na6 Ra6 22.Bg7 Kg7 23.Qd5 Be6 24.Qd4 f6 25.Bd5 Bf5 26.Qc4 Ne4 27.Qa6 Nd2 28.Qd6 Rd7 29.Qc6 Nb1 30.Rb1 Kh6 31.e4 Rd5 32.Qd5 Bg4 33.Rb7 Bc8 34.Re7 Ba6 35.h4 g5 36.Qf7 gh4 37.f4 Bc4 38.Qh7 1–0. polynesia46 – svejk, kurnik, 2012.

3.c4 Nc6 4.e3 (4.Nf3 e5=) 4...Qa5 (4...e5 5.Bb2=) 5.Bb2 Nf6 6.Nf3 Qb6 (6...d6 7.Bc3 Qc7 8.d4=) 7.Bc3 (7.Bf6 gf6 8.Nc3 Bg7+=) 7...d6 8.a3 (8.d4 Bg4=) 8...Bg4 (8...e5 9.Be2=) 9.Be2 e5 10.0–0 (10.h3 Bh5=) 10...Be7 11.h3 Bh5 12.d3 0–0 13.Nbd2 Ra7 14.Rb1 Qc7 15.Bb2 Rfa8 16.g4 Bg6 17.Kh1 e4 18.Ne1 Ne5=+ 19.f4 ef3 20.Ndf3= d5?? 21.Be5 Qd7 22.Nh4 dc4 23.Ng6 hg6 24.Nc2?? Qd5–/+ 25.Bf3 Qe5 26.Bb7 Rb8 27.Bf3 (27...Rb1 28.Qb1–+). bentengutama (2170) – igorm (2290), net–chess.com, 2003.

3.c4 d6 4.e4 Nc6 5.Nc3 g6 6.Nf3 Bg7 7.Bd3 (7.Bb2 Nf6 8.Nd5 0–0=) 7...Qa5 (7...Bc3 8.dc3 Qa5=) 8.0–0 (better is 8.Bb2!?=) 8...Bc3–/+ 9.dc3 Qc3 10.Bg5 (10.Rb1 Ra2 11.Re1–/+) 10...Ne5 (10...Bg4!?–/+) 11.Ne5+= Qe5 12.Be3 (12.Qc1 Nf6+=) 12...Nf6 13.f4 Qc3 14.a4 0–0 (14...Bd7 15.Rc1 Qb4 16.e5 de5 17.Rb1 Ba4 18.Rb4 Bd1 19.Bc5+=) 15.Qd2= Qd2 16.Bd2 Bd7 (16...b6 17.Bc3+=) 17.a5 Ra7 (17...Bc6 18.Rfe1+=) 18.Bc3 (18.Rfe1 Rd8=) 18...Rfa8 (18...Bc6 19.Rfe1+=) 19.Kf2 (better is 19.e5 de5 20.fe5=) 19...b6?? (better is 19...Ng4 20.Kg3 e5+=) 20.ab6+– Ra1 21.Ra1 Ra1?? 22.b7 Ra2 23.Kf1 Bc6 24.b8Q (24.b8Q Ne8 25.Qb6+–) 1–0. jdzg – toxm, internet, 2009.

3.e3 Ra5 4.c4 Nf6 5.Bb2 e6 6.Nf3 Be7 7.Be2 0–0 8.0–0 d5 9.Nc3? (9.d4 Nc6=) 9...Nc6?? (9...d4 10.Qc2 dc3 11.Bc3–+) 10.a3?? (better is 10.Nb5=) 10...d4–+ 11.Nb5 e5?? 12.d3+= Bg4 13.e4 Nh5 14.Bc1 Nf6 15.h3 Bh5 16.g4 Bg6 17.Nh4 Qd7 18.Nf5 Bd8 19.Bd2 Ra8 20.g5 Ne8 21.h4? Bf5–/+ 22.ef5 Qf5 23.f4 e4?? 24.Bg4+– Qg4 25.Qg4 e3 26.Be1 f5 27.Qf3 Nc7 28.Nc7 Bc7 29.Qd5 Kh8 30.Qc5 Rac8 31.Bb4 Rfe8 32.Rae1 e2 33.Rf2 Re3 34.Rfe2 Bf4 35.Re3 Be3 36.Re3 de3 37.Qe3 1–0. lendzior (1615) – 3mjack (1760), kurnik, 2012.

3.e4 d5 4.ed5 Qd5 5.Nc3 Qe6 6.Be2 Ra5 7.Nf3 h6 (7...Nc6 8.0–0=) 8.0–0+/– Nc6 9.Re1 Qd7 (9...Qd6 10.Bb5 Bg4 11.Ne4+/–) 10.Bc4 (10.Bb5 Qc7+/–) 10...e6+= 11.d3 Nf6 12.Bd2 Be7 13.Ne4 Ra8 14.Bc3 Nd4 15.Rb1 0–0 16.Ne5 Qc7 17.f4 Nd5 18.Qd2 b6 19.Ba1 Bb7 20.Qf2 f6 21.Ng6+/– Rf7 22.Bd4 cd4 23.Qd4 Rd8 24.Bd5 Rd5? 25.Qb6+– Bd6 26.Qc7 Rc7 27.Rb6 Bc5? 28.Nc5 Rdc5 29.c4 Kf7 30.Nh4 g6? 31.Ree6 R5c6 32.Rec6 Bc6 33.Kf2 1–0. Wall,Bill – Bochkin, Internet, 2003.

3.Nf3 d5 4.e3 g6 (4...Qa5 5.c4=) 5.Bb2+= White launches an attack 5...f6 6.c4 e6 7.cd5 Qd5 (7...ed5 8.Bb5 Bd7 9.Be2+=) 8.Bb5+/– Kf7 9.Nc3 Qd8 10.0–0 Ra5 11.a4 Bg7 (11...Bd7 12.d4+/–) 12.Ne4 b6 13.d4 Bb7 14.Ng3 (14.Qc2 Qd5 15.Bd3 Nd7+/–) 14…f5 (14...f5 15.Rc1 Ra7+/–; 14...Bc6 15.Qe2+/–). Stabenow,Juergen – Haantola, corr Th–EL–53–19 (year?).

3.e4 Qa5

4.Nc3 Nc6 5.Nf3 +=.

4.Nc3 e6 5.a4 Nc6 6.Nf3 Nf6 7.Bb5 Be7 8.0–0 0–0 9.Ba3 Re8 10.e5 Ng4 11.Qe2 f5 (11...Qc7 12.Rfe1=) 12.h3+/– Nh6 13.Bc4 Nf7 14.Nb5 d5 (14...Nb4!? 15.Bb4 cb4+/–) 15.ed6+– Nd6 16.Ng5! (16.Bc5?! Nb5 17.Be7 Nbd4 18.Nd4 Nd4+=) 16...Nc4?? (16...Bg5 17.Nd6 Deflection) 17.Qh5 (17.Qh5 Bd6 18.Qe8 Bf8 19.Qf7 Kh8 20.Qf8) 1–0. usingprogram (1985) – aplws, kurnik, 2011.

4.Nc3 e6 5.Nf3+= Nc6 6.Bb2 b6 7.Nb5+/– Kd8 8.a4 Qb4? 9.Ng5+– Qb2 10.Nf7 Ke7 11.Nh8 Qf6? 12.c3?? g6 13.Ng6 Qg6+= 14.f3 Ba6 15.d4 Bb5 16.ab5+/– Na5 17.dc5 bc5 18.e5 Kd8 19.b6 Qg7 20.f4 d5 21.Qa4 Qb7 22.Qb5 Nc4 23.Ra8 Qa8 24.Bc4 dc4?? 25.0–0+– Ne7 26.Qc5 Qc6 27.Rd1 Kc8 28.Qa5 Nd5 29.Qa6 Kb8? 30.Qa7 Kc8 31.Rb1 (31...Bc5 32.Kh1 Bb6 33.Qf7+/– (33.Qh7?! Nf4 34.Qg8 Bd8+=); better is 31.Kh1!?+–) 1–0. Rob (1610) – vissky, internet, 2007.

3.e4 Nc6

4.a6 ba6 5.Nc3 Rb8 6.Bc4 g6 7.Ba3 Qa5 8.Qc1 Bg7 9.Nge2 Nf6 10.f3 e6 11.Bb3 0–0 12.Rb1 Re8 13.0–0 d5 14.Bb2 Bd7 15.a3 c4 16.Ba4 d4 17.Bc6 dc3 (17...Bc6?! 18.Na2 e5 19.Nb4–/+) 18.Bc3 Qc5 19.Bd4 Qc6 20.Be3 Qc7 21.d4 Rb1 22.Qb1 Rb8 23.Qa2 Qc6 24.Nc3 Ne8 25.Rb1 Rb1 26.Qb1 Nd6 27.Qb8 Ne8?? 28.Qb2?? Bc8 29.Ne2 Qb5 30.Qb5 ab5 31.c3 Bb7 (32.Nf4 Bf8–+) 0–1. Ruszin,Peter (1915) – Simon,Nandor (2090), ch junior team Spatak II–Szarvas, 1998.

4.Nf3 d6 5.Nc3 g6 6.Bb2 Bg7 7.Be2 Nf6 8.0–0 (8.Rb1 Ra5 9.Bc4 0–0=) 8...0–0 (8...Ne4 9.Ne4 Bb2 10.Rb1–/+) 9.Qb1 Qa5 10.Re1 e6 11.Bf1 Nd7 12.Nb5 Nde5 13.Ne5 (worse is 13.Nd6 Nf3 14.gf3 Qd2 15.Bg7 Kg7+=) 13...Ne5 14.Bc3 Qd8 15.Qb2 Qg5 16.Re3 Rd8 17.Rae1 (17.Be2 Ra4=) 17...b6 18.Rg3 Qf4 19.Ree3 h5 20.Nc7 Rb8 21.Be2 h4 22.Rh3 g5 23.g3 hg3 24.hg3 Qf6 25.Kg2 Qe7 26.Nb5 f6 27.f4 (27.d4 cd4 28.Bd4 Nc6+=) 27...Ng6 (27...gf4 28.gf4 Ng6 29.Kf3=) 28.fg5 fg5 29.Bg7 Qg7 30.Qg7 Kg7 31.Rh5 Ba6 32.a4 d5 33.Rg5 (33.Nc7 Bc8 34.ed5 ed5 35.Rg5 d4+–) 33...Kf6 34.Rh5 de4 35.Nc3 Bb7 36.Nb1 Rg8 37.Kf2 Rbd8 38.Rb3 Rd6 39.a5! Rb8 40.ab6 Bd5 41.Nc3 Bb3 42.Ne4 Kg7 43.Nd6 Rb6 44.Ne8 Kf8 45.cb3 Ke8 46.Rc5 Rb3 47.Bh5 Kf7 48.Rg5 Rb2 49.Ke2 Rb4 50.Rg6 Ke7 51.Rg7 Kf6 52.Rf7 Ke5 53.Bf3 Rd4 54.g4 Rd8 55.Ke3 Rd4 56.Rf8 Rd7 57.Be2 Rd4 58.g5 Rd7 59.g6 Rg7 60.d4 Kd6 61.Bh5 e5 62.Rf6 Kd5 63.Bf3 Kc4 64.de5 Kc5 65.Ke4 Rg8 66.Kf5 Kd4 67.e6 Kc5 68.e7 1–0. Diviak,Rudolf (1890) – Vegh,Vince (1915), SVK–chT3A2, 2009.

2.ba5 Nc6

3.a6 Ra6 4.e3 Ra8 5.Bb2 Nf6 6.Nf3 d6 7.Be2 (7.Bf6 gf6 8.Bb5 Bd7=) 7...e5+= 8.0–0 Be7 9.c4 0–0 10.Nc3 e4 (10...Bf5 11.d4=) 11.Nd4 (11.Ng5!?+=) 11...Ne5 12.d3 Nd3 13.Bd3 ed3 14.Qd3 Bg4 15.Ne4 Ne4 16.Qe4 Bh5 (16...Qd7!?=) 17.Nf5 Bf6 18.Bf6 Qf6 19.Ng3 Bg6 20.Qb7 c5 21.Rfd1 Ra4 22.Qd5 Ra6 (22...Bc2 23.Rdc1+/–) 23.h3 (23.e4 Rb8+/–) 23...h6 24.Ne4 Be4 25.Qe4 Rfa8 26.Qd5 Ra2 27.Ra2 (27.Qa8!? Ra8 28.Ra8 Kh7 29.Ra7+/–) 27...Ra2= 28.Qd6?? Qf2 (28...Qf2 29.Kh2 Qg2#) 0–1. alfons78 – sierrzant1 (1770), kurnik, 2012.

3.Bb2 d5 4.d3 e5+= 5.Nd2 f6 6.Ngf3 Be6 7.e3 Bb4 8.a3 (8.a3 Ba5 9.Be2+=). sunnyda – koneserkonesera (1660), kurnik, 2011.

3.e4 Na5 4.Bb2 e6 5.d4 c5 6.dc5+= Nf6 7.e5 Ne4 8.Bd3 Nc5= 9.Nf3 Nc6 10.0–0 Qc7 11.Ba3 Nd3 12.Bf8 Nf2 13.Qd6 Qb6–/+ 14.Rf2 Qb2 15.Bg7 Rg8 16.Bf6 Qa1 17.Nfd2 Ra2 18.Qd3 Rg6 19.Qh3 h6 20.Qf3?! Rc2 21.Bh8 Rc1 22.Nf1 Qb1 23.Qf7 Kd8 24.Qf8 Kc7 25.Qd6 Kb6 26.Bf6 Rd1 27.Bd8 Ka7 28.Qa3 Kb8 (29.Bf6 Qe4–+) 0–1. Mango – Wall,Bill, Internet, 2005.

3.e4 Nf6 4.Nc3 =.

3.Nf3 e5 =.

3.Nf3 e6 4.Bb2 Nf6 5.e3 Na5 6.Be2 Be7 7.0–0 d5 (7...0–0 8.Nc3=) 8.d4 (8.Ne5 0–0=) 8...0–0 9.Nbd2 b6 10.c4 Ba6 11.cd5 Be2 12.Qe2 ed5 13.a4 Re8=+ 14.Rfc1 Bd6 15.h3 Ne4 16.Ba3 Re6 17.Bd6= Nd6 18.Ne5 f6 19.Nc6 Qd7 20.Na5 Ra5 21.Qd1 Nb7 22.Qc2 c5 23.dc5 Rc5 24.Qf5 Rd6 25.Qd7+= Rd7 26.Rc5 Nc5=+ 27.Nb1 d4 28.ed4 Rd4 29.Nc3 Rc4 30.Ra3 Rd4 (30...Kf7 31.Kf1=+) ½–½. Unger – Hansen,Bjarne G, corr 3GMM–15, 1995.

3.Bb2 Na5

4.e3 d5 5.d3 Nf6 6.Nd2 Bf5 7.Ngf3 e6 8.Be2 Bd6 9.0–0 0–0 10.c4 h6 11.cd5 ed5 12.Nd4 Bh7 13.Nb5 Be7 14.d4 c6 15.Nc3 b5 16.Nb3 Nc4 17.Bc4 dc4 18.Nc5 Bc5 19.dc5 Qd1 20.Rfd1 b4 21.Ne2 c3 22.Bc1 Ne4 23.f3 Nc5 24.e4 f5 25.e5 Rfd8 26.Rd8 Rd8 27.a3 Ra8 28.Kf2 Nb3 29.Ra2 Nc1 30.Nc1 ba3 31.Ke3 f4 32.Kd4 Bb1 33.Ra1 c2 34.Kc5 Ra6 35.e6 a2 36.Kd6 Kf8 37.Nb3 c5 38.Kd7 c4 39.e7 Kf7 40.e8Q Kf6 41.Nc1 Ra7 42.Kd6 Ra6 43.Kd5 c3 44.Qe5 Kf7 45.Qc3 Ra7 46.Ke4 g5 47.Qc4 Kg6 48.Kd3 Rd7 49.Ke2 Rd1 50.Na2 h5 51.Qc2 Bc2 52.Rd1 Bd1 53.Kd1 g4 54.Ke2 Kf5 55.Kd3 Ke5 56.Nb4 Kf5 57.Kd4 h4 58.h3 gf3 59.gf3 Kf6 60.Ke4 Kg5 61.Nd5 Kh5 62.Kf4 Kg6 63.Kg4 Kf7 64.f4 Ke6 65.Ne3 Kf6 66.Ng2 Kg6 67.Nh4 Kh6 68.Nf3 Kg6 69.f5 Kf6 70.Kf4 Kf7 71.Ke5 Kg7 72.Ke6 Kf8 73.f6 Ke8 74.Ne5 Kf8 75.Nd7 Kg8 76.f7 Kg7 77.f8Q Kg6 78.Qf4 Kh5 79.Qg4 Kh6 80.Kf6 Kh7 81.Qg7 1–0. carocan – anman (1820), kurnik, 2012.

4.e4 Nf6 5.e5 Ne4 =.

4.g3 Nf6 5.Bg2 e6 6.d3 Be7 7.Nd2 d5 8.Ngf3 c5 9.0–0= Bd7 10.Ne5 0–0 11.c4 Bc6 12.Nc6 Nc6 13.a3 d4 14.a4 Qd7 15.e3 e5 16.Re1= Nb4 17.Qb3 Rfe8 18.ed4 ed4 19.Ne4 Ne4 20.Be4 Ra6 21.Re2 Rh6 22.Bg2 b6 23.Ba3 Bd6 24.Rae1+= Rhe6 25.Qd1 g6 26.Bc1 Bf8 27.Bf4 Re2 28.Re2 Re2 29.Qe2 Qa4 30.Be4 Qd7 31.Kg2 Qe7 32.h4 Qe6 33.Qd1 Bd6 34.Bh6 Be7 35.Qa4 Bf8 36.Qa8 Qe7 37.f3 Nc2 38.Kf2 Ne3 39.Be3 de3 40.Ke3 f5–/+ 41.Qb7 fe4 42.Qe7 Be7–+ 43.de4 Kf7 44.f4 Ke6 45.Kf3 Kd6 46.Ke3 Kc6 47.e5 b5 48.Kd3 (48...b4 49.Kc2–+; 48.cb5 Kb5 49.h5 gh5–+). coloplayah (2070) – alexp (2235), net–chess.com, 2006.

3.Bb2 e5

4.e3 Nf6 5.Nf3 Ra5 6.Be2 e4 7.Nd4 Nd4 8.Bd4 Rg5 9.0–0 d5 10.f4 ef3 11.Bf3 Bd6 12.Nc3 Ng4 13.Bg4 (13.Nd5? Bh2 14.Kh1 A) 14...Rd5?! 15.Bg4 Be5 16.Bc8 Bd4 17.Qf3+= (worse is 17.Bb7 Qh4 18.Kg1 Be3 19.de3 Rd1 20.Rad1 0–0+=); B) 14...Bg3–+) 13...Bg4 14.Qb1 0–0 15.Nb5 (worse is 15.Qb7 c5–/+) 15...Be7 16.Qb2 c6 17.Na7 Qb8 18.Rab1 Bd6 19.Nc6?? (19.h4 Bh2 20.Kh1–+) 19...Bh2–+ (19...bc6?! 20.Qb8 Rb8 21.Rb8 Bb8 22.a4–+) 20.Kh1 Qg3 (20...bc6 21.Qb8 Bb8–+ (worse is 21...Rb8 22.Kh2 Rc8 23.Bc5+=)) 21.Ne7–/+ Kh8 22.Qb4 Rg8 (22...Rg8 23.Bg7 R8g7–+) 0–1. Poulsen,Rene (2080) – Deschamp,Guy (2305), IECG, 2004.

4.Nf3 Ra5 5.e3 =.

2.ba5 d5

3.Bb2 Ra5 (--> 2.ba5 Ra5 3.Bb2 d5).

3.Bb2 c5 4.Nf3 Qa5 5.Bc3 Qc7 6.e3 Nc6 7.Bb5 e6 8.0–0 Bd7 9.d4 c4 10.Ne5 Ne5 11.de5 Bb5 12.Nd2 Ne7 13.e4 Bc6 14.Rb1 Ng6 15.ed5 Bd5 16.Re1 Bc5 17.Ne4 Be4 18.Re4 0–0 19.h4 h6 20.h5 Ne7 21.Qg4 Ra2 22.Bd4 Bd4 23.Rd4 Rc2 24.Rbd1 Nd5 25.Qe4 Rc3 26.f4 Rg3 27.f5 Nc3 28.Rd7 Qd7 29.Rd7 Ne4 0–1. orangotango – Howie (2030), 2003.

3.Bb2 Nf6 4.e3 c5 5.c4 Nc6 6.Nf3 Bg4 (6...d4 7.ed4 cd4 8.Bd3+=) 7.Be2 e6 8.0–0 (8.a6 Ra6 9.cd5 Bf3 10.gf3 Rb6 11.Bf6 Qf6+/–) 8...Bd6 9.cd5 ed5 10.d4 (10.Bf6!? Qf6 11.Nc3=) 10...c4+= (worse is 10...Ra5 11.dc5 Bc5 12.Nbd2+=) 11.h3 Bh5 12.Nfd2 (12.Ne5 Be2 13.Qe2 Ra5 14.Nc6 bc6=) 12...Be2–/+ 13.Qe2 0–0 14.e4 de4 (worse is 14...Ra5 15.e5+=; worse is 14...Na5 15.e5+/–) 15.Ne4 (15.Nc4 Na5 16.Nd6 Qd6=) 15...Re8 (15...Ne4!? 16.Qe4 Re8+=) 16.Nf6= Qf6 The isolani on d4 becomes a target. Black is in command 17.Qc4 Qf4 Threatening mate... how? 18.g3 Qf5 19.Kh2 Ra5 20.Nc3= Qc2 21.Qb3 Nd4 22.Qc2 Nc2 23.Rac1 Nb4 24.a3 Nd3–/+ 25.Rc2 Nb2 26.Rb2+= Ba3 27.Rb7= Bc5 28.Rb5 Rb5+= 29.Nb5 h5 30.h4 Re2–/+ 31.Kg2 Kh7 32.Nc3= Rc2 33.Ne4 Be7 34.Rd1 Kg6 35.Rd2 Rc4 36.Kf3 f6 37.Nd6 Rc3 38.Ke2 Ra3 39.Nc4 Ra4 40.Ne3 Bb4 41.Rd4 Ra2 42.Kf3 Bc5 43.Re4 Kf7 44.Rc4 Ba7 45.Rc7 Kg6 46.Re7 Ra3 47.Ke2 Be3 48.Re3 Re3 49.Ke3 Kf5 50.f3 g5 51.Kd3?? gh4–+ 52.gh4 Kf4 53.Ke2 Kg3 54.Ke3 Kh4 55.Kf4 Kh3 56.Kf5 h4 57.Kf6 Kg3 58.Kg5 h3 59.f4 h2 60.f5 h1Q 61.f6 Qh8 62.Kg6 Qf8 63.Kf5 Kf3 64.Ke5 Kg4 65.Ke6 Kf4 66.Kd5 Kf5 67.Kd4 Qf6 68.Kc4 Qd6 69.Kc3 Qc5 70.Kd3 Kf4 71.Kd2 Qc4 72.Kd1 Qa2 73.Kc1 Ke3 74.Kd1 ½–½. carocan (1705) – rox76 (1810), kurnik, 2011.

3.e3 c5 4.Bb2 Nc6 5.Nf3 f6 6.Be2 Qa5 7.0–0 e5 8.d3 Bd6 9.Nbd2 Be6 10.Qc1 Nge7 11.c4 d4 12.ed4 Nd4 13.Nd4 ed4 14.Re1 0–0 15.Bf3 Bc8 16.Ne4 Qc7 17.Nd6 Qd6 18.a4 Ng6 19.g3 Ne5 20.Be2 Qc6 21.Qf4 Bh3 22.Qh4 Qg2 0–1. exp2005 – johamanek, kurnik, 2012.

3.Nf3 Ra5 4.e3 g6 5.Be2 Bg7 6.d4 Nh6 7.c4 dc4 8.Bc4 Rc5 9.Qc2 Ra5 10.Bd2 Ra7 11.Nc3 c6 12.0–0 0–0 13.Ne4 b6 14.Rac1 Rb7 15.Bc3 Nf5 16.Bb2 Qe8 17.a4 Nd6 18.Bd3 Bh6 19.Ne5 Bf5 20.Nd6 ed6 21.Bf5 de5 22.Be4 ed4 23.Bd4 Qe6 24.Ba1 (< 24.Bc6 Rc7 25.Bd5 Rc2 26.Be6 Rc1 27.Rc1 fe6 28.Bb6 Nd7=+) 24...Rc8 25.Qb2 f6 26.Qf6 Qe4?? (Better is 26...Qf6 27.Bf6 Bg7 28.Bg7 Kg7+/–) 27.Qh8+– Kf7 28.Qh7 Bg7 (28...Ke6 29.Qb7 Re8+–) 29.Qg7 Ke8 30.Qb7 Qg4 31.Rfd1 Kf8 32.Bf6 Qe6 33.Rd6! Qd7 34.Rd7 Nd7 35.Qd7 Rc7 36.Qc7 c5 37.Qe7 Kg8 38.Qg7# 1–0. GLChess211 – Holmes040, computer chess game, 2000.

2.ba5 e5

3.Bb2 Ra5 (--> 2.ba5 Ra5 3.Bb2 e5).

3.Bb2 d6 4.e3 Nc6 5.Bb5 Bd7 6.Qf3 Ra5=+ 7.a4 Nf6 8.Qe2 Be7 9.Bc3 Ra7 10.a5 0–0 11.a6 ba6 12.Ra6 Ra6 13.Ba6 Qb8 14.Qd1 Bg4 15.Be2=+ Be6 16.Nf3 Nd5 17.Ba1 e4 18.Nd4 Nd4 19.ed4 Qb6 20.c4 Nf6 21.d5=+ Bf5 22.Nc3 Rb8 23.Nb5 Bd7=+ 24.Bd4 Qb7 25.Nc3= c5 26.Bf6 Bf6 27.Ne4 Be5 28.0–0 f5 29.Ng3 Bd4 30.Bd3+= g6 31.Ne2 Bf6 32.Bc2 Kg7 33.d4+= cd4 34.Nd4 Qc7= 35.g3 Qc4–/+ 36.Ne6 ½–½. 73DADDELDU37 – bopl, mySchach.de, 2005.

3.Nc3 Nf6 4.e4 Bb4 5.Bd3 0–0 6.Bb2 Ba5 7.Nf3 d6 8.0–0 Nbd7 9.Re1 Nc5 10.Nd5 Nd3 11.Nf6 Qf6 12.cd3 Bg4 13.h3 Bf3 14.Qf3 Qf3 15.gf3 Bd2 16.Re2 Bb4 17.Rc2 c5 18.a3 Ba5 19.Kg2 f5 20.Rb1 Bd8 21.Be5? (better is 21.Bc3 b6 22.Rb3–/+) 21...de5–+ 22.Rc5 fe4 23.fe4 Ra3 24.Rb7 Ra2 25.Re5 Bh4 26.Rf5 Rf5 27.ef5 Rf2 28.Kg1 Rf5 29.Rd7 Rf8 30.Rb7 (30.Kg2 Rf2 31.Kg1 Rd2–+) 30...Rf3 0–1. nizef (1855) – pvanr (2245), gameknot.com, 2015.

3.e3 d5 4.c4 d4 5.d3 c5 (better is 5...de3 6.Be3 Bb4 7.Nd2 Nc6–/+) 6.ed4?? (6.Nf3 Bd6=) 6...cd4?? (better is 6...Qd4 7.Nc3 Qc3 8.Bd2 Qd4–+) 7.Bd2+= Nc6 8.a4 f5 9.Ne2 Nf6 10.Ng3 Bd6 11.Be2 0–0 12.Na3 h6 13.Nb5 Bb8 14.0–0 Be6 15.Nh5 Na5 16.Nf6 Qf6 17.Ba5 Ra5 18.f4 e4 19.de4 fe4 20.Qd4?? Qd4 21.Nd4 Ba7 22.Rad1 Rd8 23.Kh1 Rd4 24.f5 Bf7 25.Rd4 Bd4 26.h3 Ra4 27.g4 Ra2 28.Rd1 Bf6 29.Bf1 e3 30.Re1 Bd4 31.Re2 Ra1 32.Kg2 Bc4 (32...Bc4 33.Re3 Bf1 34.Kf3 Be3 35.Ke3 Bh3–+) 0–1. elektrooon – senilis (1750), kurnik, 2012.

3.Nf3 Ra5 4.e3 Nf6 5.Bc4 d5=+ 6.Be2 Bd6 7.0–0 0–0 8.d3 Nc6 9.Bd2 Ra8 10.Nc3 e4 11.de4 de4 12.Nd4 Be5 13.Nc6= bc6 14.Bc4 Qd6–/+ 15.g3? Qc5 16.Qe2 Bg4 17.Ne4 Ne4 18.Qg4 Qc4 19.Rad1 Nd2 20.Qc4 Nc4 21.Rd3 Ra2 22.c3 f5 23.h4 Nd2 24.Rd1 Ne4 25.Rf1 Rb8 26.c4 Bg3! 27.fg3 Rbb2 28.Rf5 Rg2 29.Kf1 Ng3 30.Ke1 Ra1 31.Rd1 Re2# 0–1. cefik – pcmvr (1665), internet, 2005.

3.Nf3 e4 4.Nd4 d5 5.e3 c5 6.Bb5 Bd7 7.Bd7 Nd7 8.Nb3 Ngf6 9.Bb2 c4 10.Nd4 Qa5 11.Bc3 Qc7 12.Nb5 Qb6 13.a4 Bc5 14.0–0 0–0 15.Bd4 Bd4 16.ed4 Ra5 17.N1c3 Qc6 18.Re1 Nb6 19.Qb1 Rfa8 20.Qb4 h6 21.Re3 Nh7 22.Nd6 Ng5 23.Ree1 Ne6 24.Nf5 Kh7 25.Ne7 Qc7 26.Reb1 R8a6 27.Nf5 Qf4 28.Ne3 Nd4 29.Qe7 Qg5 30.Qb7 Na4 31.Ncd5 Ra7 32.Qb4 Nc2 33.Nc2 Qd5 34.Ne3 Qe6 35.Rc1 Qf6 36.Nc4 R5a6 37.Re1 Qd4 38.Reb1 Nc5 39.Ra6 Ra6 40.Qc3 Qd3 41.Re1 Ra2 42.Qb4 Qe2 43.Rf1 Qf1 44.Kf1 Ra1 45.Ke2 Nd3 46.Qc3 Re1 0–1. color1972 – PassedPawn, ChessWorld.net, 2005.

3.Bb2 Nc6

4.d4 ed4=+ 5.Nf3 Bb4 6.c3 dc3–/+ 7.Bc3 Ra5 8.Bb4 Nb4 9.Qb3 Qf6 10.Nc3 Nd5 11.Ne4?? Qa1–+ 12.Kd2 Ra2 13.Kd3 Ra3 14.Qa3 Qa3 15.Kd4 Nge7 16.Ned2 Qc3 17.Ke4 f5# 0–1. michas – pcmvr, internet, 2005.

4.e3 Ra5 5.Nf3 Nf6 6.Be2 e4 7.Nd4 Rg5 8.0–0 Nd4 9.Bd4 d5 10.g3 (10.f4 ef3 11.Bf3 Be7+=) 10...h5 (10...Be7 11.c4 dc4 12.Nc3=) 11.h4 (11.c4 h4 12.Nc3 Qd7 13.Nd5 Nd5 14.cd5 Qh3 15.Qa4 Kd8–+) 11...Rg6+= 12.c4 Qd6 13.Kg2 (13.Qa4 Kd8 14.Kg2 Qe6=) 13...Qd7 14.Rh1 dc4 15.Nc3 b5 (15...Qc6 16.Rb1+=) 16.Qc2 Ng4 17.Ne4 (17.Qe4? Re6 18.Qf4 c5 19.Nb5 A) 19...cd4 20.Nc7 Ke7 A1) worse is 21.Bg4 hg4 22.Ne6 Qd5 (worse is 22...fe6 23.Qg4 de3 24.de3+=; 22...Ke6?! 23.Qg4 f5 24.Qg6 Kd5 25.ed4=) 23.e4 Qe6–/+; A2) 21.Ne6 Bb7 22.f3 Qe6 23.Rab1+/– (worse is 23.Qd4 Ne5=); B) 19...Qb5–/+) 17...Bb7 18.f3 Ba3 (18...Nf6 19.Bf6 gf6 20.Rab1+=) 19.Qc3 (better is 19.Rab1!? 0–0 20.Bc4 Be4 21.Qe4 bc4 22.fg4 Rg4 23.Qf3–/+) 19...Be7+= 20.Nc5 Qd6 21.Rh3 (21.Nb7?? Ne3 22.Be3 Qg3 23.Kf1 Qg2 24.Ke1 Qh1 25.Bf1 0–0–+) 21...Bc8 22.fg4 hg4 (22...Bg4 23.Bg4 hg4 24.Rh2 Qc6 25.Kg1 Bc5 26.a4 Bd4 27.ed4+=) 23.Rh2+= Rh5 24.e4 Rc5 (24...Qc6 25.Nb3 Qe4 26.Kg1–/+) 25.Bc5 (25.Bg7? Bb7 26.Kf1 f6–+) 25...Qc5 26.d4 Qa3 27.Qa3 Ba3 28.Rb1 Bd7 29.Kf2 c5 30.d5 c3 31.Bd1 (31.Bb5? c2 32.Bd7 Kd7–+) 31...c4 32.Ke1 (32.e5 Bc5 33.Ke1 Ra6–/+) 32...Ra6–/+ 33.Re2 Ke7 34.e5 b4 35.Bc2? (better is 35.d6 Ke8 36.Kf2–/+) 35...Bb2–+ 36.e6 fe6 37.Re4 Ba4 (37...Ra2?! 38.d6 Kd6 39.Rd1 Ke7 40.Rg4–+) 38.Kd1?? (better is 38.Ba4 Ra4 39.Ke2 Ra2 40.Re6 Kf7 41.Rc6–+) 38...b3 39.ab3 cb3 40.Rb2 bc2 41.Rc2 Bb3 (41...Bc2?! 42.Kc2 Ra2 43.Kc3 Ra3 44.Kd4 Rg3 45.Re6 Kf7 46.Re4=) 42.Re3 Ra2 (better is 42...Ra1!? 43.Ke2 Bc2 44.Rc3 Bd1 45.Ke3 ed5 46.h5–+) 43.Rec3 Bc2 (43...Bc2 44.Rc2 Rc2 45.Kc2 ed5–+; 43...Rc2?! 44.Rb3 Rc4 45.de6 Ke6 46.Ke2=) 0–1. marekt (2170) – bla_ner (1975), gameknot.com, 2015.

4.e3 Bb4 5.Bc4 d5 (5...Ra5 6.a3 Be7 7.Bc3=) 6.Bb3 (6.Bb5!?=) 6...f6 7.Qf3 Nge7 8.Nc3 d5 becomes the focus of attention 8...h5 (8...Na5 9.Qh5 g6 10.Qh4 Nb3 11.ab3 Ra1 12.Ba1–/+) 9.h3 (9.Nd5!? Bg4 10.Qe4+=) 9...e4 10.Qe2 Ra5 11.f3 f5 12.a3 Bc5 (12...Bd6!?=) 13.Na4+= d4 (better is 13...Bd6 14.Bg7 Rh7+=) 14.f4?? (14.Nc5 Rc5 15.fe4 fe4 16.ed4 Nd4 17.Qe4 Nb3 18.cb3 Rg5+=) 14...b6 (14...Ba7 15.ed4 Nd4 16.Bd4 Qd4 17.Nc3–/+) 15.g4 (15.Nc5!? Rc5 16.Qf2+=) 15...hg4 (15...Bd6 16.Qc4 Rf8 17.Nb6 cb6 18.Bd4–+) 16.Qc4 Rf8 (16...de3 17.Qf7 Kd7 18.Nc5 bc5 19.de3+–) 17.Qf1 (better is 17.Nc5!? Rc5 18.Qf1+=) 17...de3–+ 18.Rd1 ed2 (better is 18...Ba6 19.Ne2 Nd4 20.Bd4 Be2 (worse is 20...Bd4 21.de3 Be2 22.Ke2+/–) 21.Qe2 Qd4 (worse is 21...Bd4 22.de3 Nc6 23.ed4+=) 22.Nc5 ed2 (22...bc5?! 23.de3 Qc3 24.Kf2–/+; 22...Rc5?! 23.de3 Qc3 24.Qd2–/+) 23.Qd2 Qd2 24.Rd2 bc5 25.hg4 Ra3–+) 19.Rd2= Bd6 20.Bg7 e3 21.Rd3 Ba6 (21...Ba6 22.Bf8 Bd3 23.Qd3 Kf8 24.hg4 Ng6=). Le Duigou,Goulven (1640) – Pouzerate,Thibaut (1890), Hennebont Grand Prix, 2006.

4.e3 Nf6 5.a6 b6 6.Nf3 Bb4 7.Ne5+= Ne5 8.Be5 c6 9.a3 Be7 10.Nc3 0–0 11.Rb1 (11.Qf3 d5+=) 11...d5+= 12.a4 Nd7 13.Bg3 Ba3 (13...Nc5 14.d4 Na6 15.Bd3+=) 14.Rb3 Qe7 15.Qf3 Ra7 (15...Ba6 16.Ba6 Ra6 17.0–0+=) 16.Qf4 Bc5 (16...Ba6? 17.Ba6 Ra6 18.Qc7+–) 17.Bd3 f5 (17...Ba6 18.0–0+=) 18.Qh4 (18.0–0 g5 19.Qf3 f4 20.ef4 Ne5=) 18...g5 (18...Qe6 19.0–0+=) 19.Qh6 f4 20.Qc6 Nf6 21.Nd5 Nd5 22.Qd5 Be6 (22...Kh8 23.Qc6+=) 23.Qe5 Bb3 24.Qe7 Re7 25.cb3 fg3 (25...Kg7 26.Ke2+=) 26.hg3 Rd8 27.Ke2 Kh8 28.Bb5 (28.Bc4 Kg7+/–) 28...Bb4 (28...Kg7 29.Rd1+/–) 29.d3 Rc8 (29...Kg7 30.Rc1+/–) 30.Bc4 Kg7 31.d4 h6 32.g4 Rd8 33.Kd3 1–0. marekt (2135) – tallx (1900), gameknot.com, 2015.

4.e3 Nf6 5.a6 b6 6.Nf3 Bd6!? +=.

4.e3 Nf6 5.a6 b6 6.Nf3 e4 7.Nd4 Nd4 8.Bd4 Bc5 9.Bf6 Qf6 10.Nc3 Qg6 11.f3 f5 12.fe4 fe4 13.Bc4 Rf8 14.Rf1 c6 15.Rf8 Bf8 16.Kf2 b5 17.Be2 Qf5 (17...Ba6?? 18.Bh5+–; 17...Ra6?? 18.Bh5 d5 19.Bg6 hg6 20.a4+–) 18.Kg1 b4 19.Na4 Ba6 20.c4 Qe5 21.Rc1 Kd8 22.Qb3 h5 23.Bf1 c5 24.Nb6 Bd6 25.g3 (25.Na8?? Qh2 26.Kf2 Qh4 27.Ke2 Qg4 28.Kf2 Bg3 29.Kg1 Bb7–+) 25...Ra7 26.a3 (26.Nd5!? h4 27.Bg2–/+) 26...h4–+ 27.ab4 hg3 28.bc5 (28.hg3 Qg3 29.Bg2 Qh2 (29...cb4?! 30.Nd5–/+) 30.Kf1 Bg3 31.bc5 d6–+) 28...Qc5 (28...gh2 29.Kh1 Qc5 30.Nd5–/+) 29.Nd5 Bb7 30.Qb1 gh2 31.Kh1 Bd5 32.cd5 Rb7! 33.Qa1 (33.Qb7 Qb4 Double attack (33...Qc1 Deflection; 33...Qb4 Decoy)) 33...Qa3 (worse is 33...Qd5 34.Qg7 Qf5 35.Qh8 Qf8 36.Qh4 Qe7 37.Qh8 Qf8 38.Qh4 Qe7 39.Qh8 Qf8=) 0–1. marekt (2130) – pvanr (2245), gameknot.com, 2015.

4.e3 Nf6 5.Nf3 Ra5 6.d3 Bb4 7.c3 Be7 8.Nbd2 d5 9.Be2 0–0 10.0–0 Ba3 11.Ba3 Ra3 12.Qc1 Qe7 Black plans e4 13.d4 e4 14.Nb3?? (better is 14.Ne5+=) 14...Bg4–+ 15.Ne5 (15.Nc5 Ra7–+ (15...ef3?! 16.gf3 Bh3 17.Qa3–+)) 15...Be2 16.Re1 Bb5 (16...Ne5?! 17.de5 Ng4 18.Re2 Ne5 19.Rb1–+) 17.Nc5 (17.c4 dc4 (17...Ne5?! 18.de5 Bc4 19.ef6 gf6 20.Nd4–+) 18.Nc4 Ra7–+) 17...Ne5 18.Qa3 (18.de5 Qc5 19.ef6 gf6 20.Qd1–+) 18...Nf3 19.gf3 ef3 20.e4 (20.Qb4 Ng4 21.Nd7 Qd7 22.Qa3 Nh2 23.Kh1 Qh3 24.Qf8 Kf8 25.e4 Qg2) 20...Ne4 (better is 20...Ng4!? 21.c4 (21.ed5?? Qh4 22.Nd3 Qh2 23.Kf1 Qf2) 21...Nh2 22.Ne6 (22.cb5?? Qg5 23.Kh2 Qg2; 22.Kh2?? Qh4 23.Kg1 Qg4 24.Kh2 Qg2) 22...Qa3 23.Nc5–+) 21.Qb4 (21.Qc1 Qh4 22.Re4 de4 23.Kh1 Qf2 24.Qg5–+) 21...Qg5 0–1. preethan (2135) – pcmvr, net–chess.com, 2015.

4.e3 Nf6 5.Nf3 Ra5 6.Be2 e4 7.Nd4 Rg5 (7...Be7+=) 8.Bf1 (8.0–0!?+=) 8...Be7 9.h4 Rg6 10.h5 Rg5 11.h6 gh6 12.Rh6 Nd4 13.Bd4 d5 14.g3 (14.Nc3 0–0 15.Na4 b6–/+) 14...Ng4 15.Bh8 Nh6 16.Bc3 (16.Bb2 Bg4 17.Qc1 Rh5–+) 16...Ng4–+ 17.Bg2?? (better is 17.Qe2–+) 17...Nf2 18.Qe2 Nh3 19.Bh3 Bh3 20.Qh2 (20.Qb5 Kf8 21.d3 d4 22.Qb7 de3 23.Qe4 Rg3–+) 20...Qd7 21.d3 (21.d4 Bd6 22.Kd1 Rg3 23.Kc1–+) 21...Bd6 22.Kd1 (22.Kd2 Rg3 23.de4 Rg2 24.Qg2 Bg2–+) 22...Rg3 23.Kc1 (23.de4 Rg2 24.Qg2 Bg2 25.ed5 Bd5–+) 23...Rg2 24.Qh1 ed3 25.cd3 Qa4 26.Qg2 Bg2 (26...Bg2 27.Bh8 Qb5–+) 0–1. decu40 (1935) – pman3660 (2255), gameknot.com, 2015.

4.e4 Ra5 5.Nf3 Nf6 6.Nc3 Bc5 7.Be2 0–0 8.0–0 d6 9.d3 Nd4 10.Nd4 Bd4 11.Kh1 Be6 12.Qd2 b6 0–1. justforfun (2510) – pcmvr, net–chess.com, 2015.

4.e4 Ra5 5.Nf3 Nf6 6.Nc3 Bc5 7.h3 0–0 8.Be2 (8.Bc4!?–/+) 8...d5 9.ed5 Nd5 10.Ne4 Bf5 11.Nc5 Rc5 12.d3 Ncb4 13.c4 Nf4 14.0–0 Re8 (better is 14...Qe7–+) 15.d4?? (better is 15.Ba3 Ne2 16.Qe2 Bd3 17.Qd2 Bf1 18.Bb4 Bg2 19.Rd1–+) 15...ed4–+ 16.Nd4 (16.Re1 Nc2 (16...Ne2?! 17.Re2 d3 18.Re8 Qe8 19.Rc1–/+; 16...Re2?! 17.Re2 Ne2 18.Qe2–+) 17.Qd2 Na1 (17...Re2?! 18.Re2 Ne2 19.Qe2 Na1 20.Bd4–+; 17...Ne2?! 18.Re2 Re2 19.Qe2 Na1 20.Bd4–+) 18.Ba1 Ne2 19.Re2 Re2 20.Qe2 d3–+) 16...Bc2!! (16...Ne2?! 17.Ne2 Nd3 18.Qd2 Rc4 19.Rad1–+) 17.Qd2 (17.Nc2 Qd1 Double attack (17...Re2 Deflection; 17...Qd1 Decoy)) 17...Qg5 (17...Qg5 18.Qf4 Qf4–+) 0–1. mbarker (2410) – pcmvr, net–chess.com, 2015.

4.e4 Ra5 5.Nf3= Nf6 6.Bd3 Bc5 (6...Bb4 7.a3 Bc5 8.Ne5 Ne5 9.Be5 Bf2 10.Kf2 Re5 11.Nc3=+) 7.Nc3 (7.Bc3 Bb4=+) 7...Ba3 (7...d6 8.Bc4=+) 8.Rb1 (8.Ba3 Ra3 9.0–0 d6=) 8...Bb2 9.Rb2 0–0 10.0–0 b6 11.Bc4 (11.Qe2 Bb7=) 11...Bb7 (11...Ne4 12.Ne4 d5 13.Bd3 de4 14.Be4=+) 12.Re1 d6 13.d3 Ne7 (13...Bc8 14.Bb5=) 14.Qd2 (14.d4 Ng6=) 14...Ng6 15.d4 (15.Reb1 d5 16.ed5 Nd5 17.Nd5 Bd5 18.Bd5 Qd5=+) 15...Nf4 (15...ed4 16.Nd4 Re8 17.Bd3=) 16.Rb5 Qd7 (16...Rb5 17.Bb5 Qc8 18.h3= (< 18.de5 Qg4 19.Nh4 de5–/+)) 17.h3 (better is 17.Ra5!? ba5 18.h3= (< 18.de5 Qg4 19.Bf1 Ne4 20.Ne4 Be4=+)) 17...Ne4 18.Ne4 Rb5 19.de5 Be4 20.Bb5 Qf5 (20...Qb5?! 21.Re4 de5 22.Ne5=) 21.Bd7 Nh3 (21...Ne6 22.ed6 Bf3 23.gf3 Qg6 24.Kf1 cd6 25.Qd6=) 22.Kh2= Qd7 23.Re4 Qf5 24.Rh4 ½–½. Mullen,John (1660) – van Rooijen,Peter (1815), IECC, 2000.

4.e4 Nf6 5.Nc3 =+.

4.Nf3 Ra5 5.e3 e4 =.

4.Nf3 Ra5 5.e4 Nf6 =+.

4.Nf3 d6 5.c4 Na5 6.e3 Nf6 7.Be2 Be7 8.Qc2 b6 9.0–0 0–0 10.d4 ed4 11.ed4 Ba6 12.Nbd2 d5 13.Rfe1 dc4 14.Nc4 Nc4 15.Bc4 Bb7 16.Ne5 Nd5 17.Qb3 Ra5 18.a4 f6 19.Nd3 Kh8 20.Rac1 Bd6 21.g3 (21.Nc5 Qa8 22.Nb7 Qb7+=) 21...Qd7 22.f4 (Better is 22.Nc5! Bc5 23.dc5=+) 22...Qa4–/+ 23.Qd1 Qd1 24.Rcd1 h6 25.Nf2 Ba6 26.Bd3 Bd3 27.Nd3 Ra2 28.Ra1 Rfa8 29.Ra2 Ra2 30.f5 Nb4 31.Nb4 Bb4 32.Rb1 Kg8 33.Bc1 Bd6 34.Rb2? (Better is 34.Be3–/+) 34...Ra1–+ 35.Rc2 Ba3 36.Kg2 (36.Rc7 Rc1 37.Rc1 Bc1 38.Kf2–+) 36...Rc1 (37.Ra2 Bb4 38.Ra8 Kh7–+; 36...Bc1?! 37.d5–+) 0–1. Frech,Josef (1610) – Bermadinger,Hermann (1910), Donau op–B 9th, 2000.

3.e4 Nf6

4.Nc3 Bb4 5.Nge2 Nc6 6.Bb2 d6 7.h3 0–0 8.Ng3 d5 9.ed5 Nd5 10.Nd5 Qd5 11.Bd3 f5 (11...Qg2?? 12.Be4 Qh1 13.Bh1+–) 12.Qe2 (12.c3 Qd3 13.Qb3 Rf7 14.cb4 Qb3 15.ab3 Nb4+=) 12...Be6 (12...Ba5?? 13.Bc4 Bd2 14.Kf1 Qc4 15.Qc4 Rf7 16.Kg1+–; 12...Qg2?! 13.Be5 Bd7 14.Bc4 (14.Bc7?? Rae8–+) 14...Kh8 15.0–0–0 (15.Bc7 Rae8 16.c3 Re2 17.Ke2 Re8 18.Kd3 Ba5–+) 15...Ne5 16.Qe5+=; 12...Ra5?? 13.Bc4 Bd2 14.Kf1+–) 13.0–0 (13.a6 ba6 14.0–0 Rab8+=) 13...Ra5–/+ 14.Rfe1 Bd6 (14...Ra2 15.Ra2 Qa2 16.Be5+/–) 15.a3 Ne7 (15...Nd4 16.Qf1–/+) 16.Nf1?? (16.Bc3 Rc5 (worse is 16...Ra3 17.Ra3 Ba3 18.Be5+/–) 17.Bb4 Ng6=) 16...Qc6?? (better is 16...e4!?–/+) 17.Ne3 (better is 17.Bc3 Rc5 18.Bb4+=) 17...Ra4?? (better is 17...Rc5 18.a4 Qd7=) 18.Bb5+– Qb6 19.Ba4 Qb2 20.Nc4 Qd4 21.Bb3 Ng6 (21...Bc4 22.Qc4 Kh8 23.Qd4 ed4 24.c3+–) 22.Nd6 (22.Ne5!? Bb3 23.Ng6 Bc4 24.Ne7 Kh8+–) 22...Qd6 23.Be6 Qe6 24.Qb5 1–0. Jensen,Arent O – Woods,DM, Eberhardt Wilhelm Cup B Final bd06, 1966.

4.Nf3 Ne4 5.Qe2!? d5 6.Nc3 Nc3 7.Qe5 Qe7 8.Qe7 Be7 9.dc3 =+.

4.Nf3 Ne4 5.Qe2 d5 6.Nc3 Nc6 7.Ne4 de4 8.Qe4 Ra5 9.Bb2 =.

4.Nf3 Ne4 5.Qe2 d5 6.Ne5? Bd6–+ 7.d4 0–0 8.Qf3 c5 9.Be2? (9.Bb2–+) 9...cd4 10.Nd3 Qa5 11.c3 (11.Kf1–+) 11...dc3 12.Be3 (12.0–0 Nc6 13.Be3 c2–+) 12...c2 13.Nd2 Re8 14.Nc1 (14.Rc1 Qc3 15.0–0 Nd2 16.Qd5 Nf1 17.Rf1 Qc7–+) 14...Qc3 (14...Qc3 15.0–0 Qa1–+) 0–1. mgilbert (2125) – pcmvr, net–chess.com, 2015.

4.Nf3 Ne4 5.Ne5? Qf6 (5...Ra5?! 6.d4 Qf6 7.Qe2 Bb4 8.c3 Nc3 9.Nc3 Bc3 10.Bd2 Bd2 11.Qd2–/+) 6.Nc4?? (6.Qe2 Qe5 7.Nc3–+) 6…Qf2# 0–1. cengel – pcmvr, ChessWorld.net, 2002.

2.ba5 Nf6

3.Bb2 Ra5 (--> 2.ba5 Ra5 3.Bb2 Nf6).

3.Bb2 Nc6 4.Nf3 e6 5.e3 Ra5 6.Bc4 d5 7.Be2 Bd6 8.d4 Ne4 9.0–0 0–0 10.c4 dc4 (10...b6!?–/+) 11.Bc4= 1–0. Wurm,Tamas – Ferrero,Leandro, IECG, 2004.

3.Bb2 d6 4.Bf6 ef6 5.c3 Ra5=+ 6.Qb3 Nd7 7.e3 Nc5 8.Qb2 Be7 9.Nf3= 0–0 10.Be2 Na4 11.Qb4 c5 12.Qb3 Be6 13.Qb7= d5 14.0–0 Qd6 15.Qb3 Bf5 16.Nh4 c4 17.Qa3 Qe6 18.Qc1 Nc5 19.Nf5 Qf5 20.Na3 Rfa8=+ 21.Nc2 Ra2 22.Ra2 Ra2 23.Nd4 Qg6 24.Bf3 Bd6 25.Bd5?? Qh5–+ 26.Bf7 Kf7 27.f4 Qd5 28.Nf5 Qf5 (29.Rd1 Bf4–+) 0–1. 73DADDELDU37 – Juliette2103, mySchach.de, 2005.

3.Bb2 e6 4.Nf3 Be7 5.g3 0–0 6.Bg2 Ra5 7.d3 b6 8.0–0 Bb7 9.Nbd2 d6 10.Nb3 Rh5 11.e4 e5 12.Nfd2 Nbd7 13.Bf3 Rh6 14.Bc1 Rg6 15.Bg2 d5 16.ed5 Bd5 17.Qe2 Bg2 18.Kg2 Nd5 19.Bb2 Bd6 20.Ne4 f5 21.Nc3 Nc3 22.Bc3 f4 23.Nd2 Qg5 24.Nf3 Qh5 25.Rh1 fg3 26.hg3 Qf5 27.Nh4 Qf6 28.Ng6 Qg6 29.Raf1 Qf7 30.Qe4 Nf6 31.Qc4 Qc4 32.dc4 Ne4 33.Bb2 Ra8 34.a3 Ra4 35.f3 Nd2 36.Rd1 Nc4 37.Bc1 Na3 38.Ba3 Ra3 39.Rd3 Ra2 40.Rd2 Kf7 41.Kh3 h6 42.Rhd1 Ke6 43.c3 Ra3 44.Rd3 Kf5 45.Re1 Kf6 46.Re4 Kf5 47.g4 Kf6 48.Kh4 Ra1 49.Kg3 Rg1 50.Kf2 Bc5 51.Ke2 1–0. giorgo – pudak (1635), playok.com, 2012.

3.Nc3 e5 4.e4 Ra5 5.Bb2 Bc5 6.Bc4 d6 7.Nf3 Bg4 8.h3 Be6 9.Be6 fe6= 10.d3 0–0=+ 11.Qd2 Nc6 12.0–0 Qe8 13.Ne2 h6 14.Ng3 Qg6 15.Nh4?? Qg3–+ (16.Nf3 Ne4–+) 0–1. Christobal (1630) – pcmvr, internet, 2005.

3.d3 e5=+ 4.Bb2 Bb4 5.c3 Ba5 6.Nf3 Qe7 7.e4 d5 8.Nbd2 Nc6 9.ed5 Nd5 10.c4 Nf4–/+ 11.Be2 Ng2–+ 12.Kf1 Bh3 13.Kg1 Bd2 14.Qd2 Nf4 15.Re1?! Ra2 16.Bd1 Qf6 17.Ne5 Ne5 18.Re5 Qe5!! 19.Be5 Rd2 20.Ba4 Ke7 21.Bf4 Re2 22.f3 Ra8 23.Bc7 Ra4 24.Be5 Rg2 25.Kf1 Rb2 26.Ke1 Ra1# 0–1. juancabeta – pcmvr (1735), Chesshere.com, 2005.

3.d4 d5 4.Nf3 =.

3.e4 Ne4–/+ 4.Bd3 Nc5 5.Bc4 d5 6.Bd3 Nd3–+ (7.cd3 e5–+) 0–1. cole baker – pcmvr, Chesshere.com, 2005.

3.d4 e6

4.c4 d5 5.cd5 ed5=+ 6.Bg5 Bf5 7.e3 Bb4 8.Nd2 Ba5 9.Ngf3 Bc3 10.Rc1 Bb2 11.Rc5 Ra2 12.Bb5?? c6–+ 13.Bc6 bc6 14.0–0 Ba3 15.Qb3 Bc5 16.Qa2 Bd6 17.Ne5 0–0 18.Rc1 Qc7 19.Bf6 gf6 20.Nef3 Nd7 21.Nh4 Bd3 22.Qb3 Bg6 23.h3 Rb8 24.Qa4 Rb5 25.Qa8 Nb8 26.g3 Ra5 (27.Rc6 Ra8 (27...Qc6?! 28.Qa5 Na6 29.Qd8 Kg7 30.e4–+) 28.Rc7 Ra1 29.Kg2 Bc7–+) 0–1. chess55555 – pcmvr (1965), internet, 2007.

4.c4 Ne4 5.e3 =.

4.Qd3 d5=+ 5.Qb5 Nc6 6.Qd3 e5–/+ 7.Ba3? Nd4–+ (8.Qc3 Bf5 9.Bf8 Nc2 (9...Kf8?! 10.Na3–+; < 9...Rf8 10.Na3–+) 10.Kd1 Kf8–+ (10...Rf8?! 11.Qe5 Qe7 12.Qf5 Na1 13.Nc3–+; 10...Na1 11.Bg7 Ng4 12.Bh8 Nf2 13.Ke1 Nh1 14.Qe5 Be6 15.Bf6 Nc2 16.Kd2=); 7...ed4?! 8.Bf8 Rf8 9.Nf3–/+) 0–1. lachezar – pcmvr, Chesshere.com, 2005.

4.e3 d5 =.

3.Nf3 Ra5

4.Bb2 Nc6 =.

4.d4 Ra7 =.

2.Bb2 ab4=+

3.a3 Ra4 4.c3 b5 5.cb4 e6 6.e3 Qe7? 7.Bc3 Ba6?? 8.Bc4 bc4 9.Qa4+/– Nf6 10.b5 Bb5?? 11.Qb5 Qd8 12.a4 c6 13.Qb7 g6 14.a5 Bc5 15.Bf6 Qf6 16.Qb8 Ke7 17.Qb7 Qa1 18.a6 h5? 19.Nf3+– f6 20.0–0 h4 21.Nc3 Rh5 22.Ra1 h3 23.a7 hg2 24.a8Q Rf5 25.Ra7! Rf3 26.Qd7# 1–0. Cruncher87@ – ben188@, mySchach.de, 2005.

3.a3 Nc6 4.ab4 Ra1 5.Ba1 Nb4 6.Bc3 e6 7.Na3 Nd5 8.Nc4 Nc3 9.dc3 d5 10.Ne5 Bd6 11.f4 f6 12.Nef3 Bf4 13.g3 Be3 14.Nh3 Ne7 15.Nd4 0–0 16.Bg2 c5 17.Nf3 Qa5 18.Qd3 Qa1 19.Qd1 Qc3 20.Kf1 Nf5 21.Nf2 Bf2 22.Kf2 Ne3 23.Qd3 Qd3 24.cd3 Ng2 25.Kg2 Bd7 26.Rf1 b5 27.e4 de4 28.de4 Ra8 29.e5 f5 30.Nd2 Bc6 31.Kh3 Ra2 32.Rd1 c4 33.Nb1 Bd5 34.Nc3 Rb2 35.Nd5 ed5 36.Rd5 c3 37.Rc5 c2 38.e6 Kf8 39.Kh4 g6 40.Kg5 Ke7 41.h4 b4 42.Kh6 b3 43.Kh7 Ke6 44.Kg6 Rb1 45.h5 c1Q 46.Rf5 Qc2 47.g4 Rg1 48.Kg5 Rg4 49.Kg4 Qf5 50.Kh4 Qh5 51.Kh5 b2 52.Kg5 b1Q 53.Kf4 Qd3 54.Kg5 Qf3 55.Kg6 Qg4 56.Kh7 Kf7 57.Kh6 Qg6# 0–1. ronnieg (2545) – robynet (2835), freechess.org, 2001.

3.a3 e6 4.h3 Nf6 5.h4 Be7 6.h5 c5 (6...0–0!?–/+) 7.h6 gh6 8.Rh6 Rg8 (8...Nc6 9.Nf3+=) 9.e3 Rg6 10.Rh3 d5 11.Bd3? (better is 11.Nf3 ba3 12.Ra3 Ra3 13.Na3+=) 11...Rg2–+ 12.Kf1 Rg1?? (better is 12...Rg7–+) 13.Kg1+= e5 14.Be5?? Bh3–+ 15.Qf3 Bg4 16.Qf4 Nbd7 17.Bc7 Qc8 18.Bb5 h5 19.Be5 Kf8 20.Qg5?? Ne5–+ 21.Qe5 Bf3 22.ab4 Ra1 23.Qa1 Qh3 24.Bf1 Qg4 25.Kh2 Qh4 26.Bh3 Ng4 27.Kg1 Qf2 0–1. xtom – wks, kurnik, 2011.

3.e3 b6 4.Nf3 Bb7 5.Be2 e6 6.0–0 c5 7.d3 Nf6 8.Nbd2 g6 (8...d5 9.Nb1–/+) 9.c3 bc3 10.Bc3 Bg7 11.a4 Nc6 12.Nc4 d5 13.Nce5 Ne5 14.Ne5 0–0 15.Qc2 Qc7 16.Bf3 Rfc8 17.Rfc1 Ba6 18.Qd2 Rd8 19.Qb2 Ne8 20.Ng4 Bc3 (better is 20...Bd3!? 21.Bg7 Ng7–+) 21.Qc3+= h5 22.Nf6? (better is 22.Ne5+=) 22...Nf6–+ 23.Qf6 Rdc8 24.Qg5 Bd3–+ 25.Bh5 Qd8 26.Qd8 Rd8 27.Bf3 Ra5 28.Rc3 c4 29.h3 Kf8 30.e4 d4 31.Rcc1 e5 32.Bd1 Ke7 33.f3 Rda8 34.g4 b5 35.Kf2 ba4 36.Ra3 Kd6 37.Rca1 Kc5 38.Ra4 Ra4 39.Ra4 Ra4 40.Ba4 f6 41.h4 Kb4 42.Bd1 Kc3 43.Ke1 Kb2 44.h5+= gh5 45.gh5 c3 46.h6 c2?? 47.Bc2!+– Bc2 48.h7 d3 49.Kd2 f5 50.h8Q fe4 51.Qe5 Kb3 52.fe4 Kc4 53.Qd5 Kb4 54.e5 Bb3 55.Qd6 Kc4 56.e6 (56.e6 Ba4 57.e7+–) 1–0. ejdrzej (1745) – fakazer, kurnik, 2012.

3.e3 e6 4.Bc4 d5 5.Bb3 c5 6.Nf3 c4 7.Bc4 dc4 8.Ne5 Qc7 9.Nf7 Kf7 10.Qh5 g6 11.Qf3 Nf6 12.Bf6 Qc6 13.Qc6 Nc6 14.Bh8 b3 15.cb3 cb3 16.a3 e5 17.d4 Bd6 18.de5 Be5 19.Be5 Ne5 20.Kd2 Be6 21.Nc3 Nc4 22.Kd3 b2 23.Rab1 Ra3 24.e4 b5 25.Kc2 b4 26.Nd5 Bd5 27.ed5 Ke7 28.Rhe1 Kd6 29.Re6 Kd5 30.Re7 Rc3 31.Kd1 Rd3 32.Ke1 Kd4 33.Rd7 Kc3 34.Rd3 Kd3 35.Kd1 Kc3 36.g3 Na3 37.Rb2 Kb2 38.f4 Kc3 39.g4 b3 40.f5 b2 41.f6 b1Q 42.Ke2 Qb6 43.f7 Qe6 44.Kf3 Qf7 45.Kg3 Qf6 0–1. lousse – kit35, kurnik, 2012.

3.e3 Nf6 4.Nf3 d5 5.Be2 e6 6.0–0 Bd6 7.d4 (7.a3 0–0–/+) 7...0–0 8.a3 ba3 (8...Nc6 9.ab4 Ra1 10.Ba1 Nb4 11.Nbd2–/+) 9.Na3 Ne4 (9...b6 10.c4–/+) 10.Nb5 Ra1 11.Qa1 Be7 12.c4 c6 (12...Bd7 13.Rc1+=) 13.Nc3 Nc3 14.Bc3 b6 15.c5 (15.Qa7 Nd7+=) 15...bc5 16.dc5 f6 17.Rb1 Bc5? (better is 17...Nd7!? 18.Nd4 Ne5= (worse is 18...Bc5 19.Ne6 Qe7 20.Nf8 Nf8 21.Qa8+/–)) 18.Rb8+/– e5 19.Bb4 Bb4 20.Rb4 c5 (20...Bf5 21.Rb3+/–) 21.Rb5+– c4 22.e4 Be6 (22...de4!? 23.Bc4 Kh8+/–) 23.ed5+– Bd5 24.Qc3 Kh8 25.Bc4 Bc4 26.Qc4 Qd1 27.Qf1 Rd8 28.Rb1 Qc2 (28...Qd5 29.Qe2+–) 29.Rc1 Qf5 (29...Qb3 30.Nd2 Qd5 31.Nc4+–) 30.Rd1 (30.Rd1 Rd1 31.Qd1+–; 30.Qc4 Qd7+–) 1–0. Dopper,Johan – Gnuechtel,Andreas, corr TKM/A004, 2000.

3.e4 c5 4.Nf3 Nc6 5.Be2 d6 6.0–0 Be6 7.d4 cd4=+ 8.Nd4 Nd4 9.Qd4+= Ra2?? 10.Ra2 Ba2 11.Bb5 (11...Qd7 12.Bd7 Kd7 13.Qa7+–) 1–0. yulio – WoodPusher83, ChessWorld.net, 2006.

3.e4 Nc6 4.f3 (4.Nf3 d5 5.e5 Bg4=+) 4...e5 5.d4 (5.Bb5 Qg5 6.g3 Bc5–/+) 5...ed4–+ 6.Bd4 Nd4 7.Qd4 Qf6 8.Qf6 Nf6 9.Bc4 Be7 10.Ne2 d6 11.0–0 0–0 12.Bb3 (12.Rd1 Rd8–/+) 12...c5 13.Nd2 Be6 14.Be6 fe6–+ 15.Nc4 d5 16.ed5 ed5 17.Ne5 d4 18.Rfe1 Bd6 19.Nc4 Bc7 20.Ng3 Nd5 21.Ne4 Rfe8 22.h3 Nf6 23.Nc5 Re1 24.Re1 Bg3 25.Re7 Re8?? 26.Re8+= Ne8 27.Nb7 Nc7 28.Nbd6 Nd5 29.Nf5 Bf4 30.Nd4+/– Nc3 31.Kf2 Na2 32.g3 Bc7 33.Nb5 Bd8 34.f4 Nc3? 35.Nc3+– bc3 36.Ke3 Bf6 37.Kd3 h6 38.Ne5 Be5 39.fe5 Kf7 40.Kd4 1–0. slavisa3 – ontherooks, Live Game Caissa's Web, 2004.

3.Nf3 c5 4.a3 Nc6 5.ab4 Ra1 6.Ba1 Nb4 7.c3 (better is 7.Bc3+=) 7...Na2?? (better is 7...Nc6–/+) 8.Qb3+– Qa5 9.Na3 1–0. Fournier,Frederic (1990) – NN, Active, 2004.

3.Nf3 Nc6 =+.

3.Nf3 d6 4.g3 Be6 5.Bg2 Ra2 6.Ra2 Ba2 7.0–0 Bb1 8.Qb1 Nc6 9.Qa2 Nf6 10.c3 bc3 11.Bc3 e5 12.d3 Be7 13.Nd2 0–0 14.Qa4 Qa8 15.Qb5 Qa6 16.Qb3 Ra8 17.Rb1 Rb8 18.Ra1 Qb6 19.Qa4 d5 20.e4 d4 21.Ba5 Qb2 22.Qa2 Qa2 23.Ra2 Na5 24.Ra5 Bb4 25.Rb5 Bd2 26.Bf1 b6 27.Kg2 Ba5 28.Kf3 c5 29.Bh3 Nd7 30.Bd7 f6 31.Bc6 Kf7 32.Bd5 Ke7 33.Bc4 Kd7 34.h4 Kc7 35.Kg4 Bd2 36.f4 Ra8 37.fe5 fe5 38.Kf5 Re8 39.g4 Bf4 40.h5 Rf8 41.Ke6 Rf6 42.Ke7 Bg5 43.Rb3 Rf4 44.Ke6 Rg4 45.Ke5 Bf6 46.Kf5 Rg5 47.Kf4 Rh5 48.Ra3 Rh4 49.Kg3 h5 50.Ra7 Kc6 51.Rf7 Rg4 52.Kh3 Rf4 53.Kg3 Rf1 54.Rf8 h4 55.Kh3 Rf3 56.Kg4 Rg3 57.Kh5 h3 58.Rc8 Kb7 59.Re8 h2 60.e5 h1Q 0–1. giorgo – seppdietrich, playok.com, 2012.

3.a3 ba3

4.Ra3 d6 5.Ra8 1–0. xtom – marvis (1690), kurnik, 2012.

4.Na3 b5 5.e4 b4 6.Nb5 Ra1 7.Ba1 c6 8.Nd4 Ba6 9.Ba6 Na6 10.Ngf3 Nf6 11.d3 Qb6 12.0–0 g6 13.Ng5 Bh6 14.Ngf3 c5 15.Nb3 0–0 16.c3 bc3 17.Bc3 d6 18.e5 Nd5 19.Ba1 Nab4 20.ed6 ed6 21.d4 c4 22.Nbd2 c3 23.Ne4 c2 24.Qe2 c1Q 25.Rc1 Bc1 26.h3 Nf4 27.Qd1 Nbd3 28.d5 f5 29.Neg5 Qf2 0–1. guest1181 – guest1287, ICS blitz, 2000.

4.Na3 c6 5.e3 d5 6.Bd3 f6 (6...Nd7 7.Nf3–/+) 7.h4 (7.Qh5!? Kd7 8.Bf5 e6 9.Qf7 Qe7 10.Be6 Kd8 11.Qe7 Be7 12.Bc8 Kc8 13.Nf3=) 7...e5 (7...Nh6 8.f4–/+) 8.h5 (better is 8.Qh5!? Ke7 9.Bh7+=) 8...Be6 9.f3 Nd7 10.g4 Bd6 11.Nc4?? (better is 11.Ne2–+) 11...dc4 12.Ra8 Qa8 13.Bf5 Bf5 14.gf5 Nh6 15.Ne2 0–0 16.f4 Nc5 17.Rg1 Qe8 18.Nc3 ef4 19.Qf3 fe3 20.de3 Be5 21.Ke2 Qd7 22.e4 b5 23.Bc1 Kh8 24.Bh6 gh6 25.Qe3 Bc3 26.Qc3 Qd6 27.Qe3 Qe5 28.Kf3 Re8 29.Rg4 Rg8 30.Rg8 Kg8 31.c3 Kf7 32.Qd2 Qe4 33.Kf2 Qf5 34.Ke1 Qe4 35.Kd1 Qd3 36.Qd3 cd3 37.Kd2 f5 38.Ke3 Kf6 39.Kd2 If White now would get f4 in, he might survive 39...Ke5 40.Ke3 f4 41.Kd2 Ke4 42.Ke1 Ke3 43.Kd1 f3 44.Ke1 f2 45.Kf1 d2 46.c4 b4 47.Kg2 d1Q 48.Kg3 f1Q 49.Kh4 Qf4 50.Kh3 Qh1# (50...Qdf3#) 0–1. xtom – paul49 (1645), kurnik, 2011.

4.Na3 Nc6 5.e3 b6 6.h4 Bb7 7.g4 h6 8.f3 Nf6 9.Nb5 Ra1 10.Qa1 Nb4 11.Qa4 e6 12.c3 Na6 13.Bd3 (better is 13.e4!?–+) 13...Nc5 14.Qc4? (14.Qc2 Ng4! 15.c4 Be7 16.Bg7 Nd3 17.Qd3 Bh4 18.Ke2 Nf2–+) 14...d5 (better is 14...c6 15.Qd4 Nd3 16.Qd3 cb5 17.e4–+) 15.Qd4 c6 (15...Nd3?! 16.Qd3 c6 17.Nd4–+) 16.Na3 Nb3 17.Qa4 Nc5 18.Qa7?? Nd3–+ 19.Ke2 Nc5 20.d4 Ba6 21.c4 Bc4 22.Nc4 Ncd7 23.Nd2 b5 24.e4 de4 25.fe4 Bb4 26.Rh3 Ng4 27.Rg3 Qh4 28.Kf3 h5 29.Qa8 Qd8 30.Qc6 Qb6 31.Qc8–/+ Qd8 32.Qd8?? Kd8–+ 33.Nb3 Bd6 34.e5 Be7 35.Ne2 Kc7 36.Nf4 g6 37.Bc3 Ra8 38.Ba5 Kc6 39.Nd3 Bh4 40.Rg2 Nb6 41.Rc2?? Nc4 42.Nb4 Kd7 43.Nc5 Ke7 44.Nc6 Kf8 45.Nd7 Kg7 46.Bd8 Bd8 47.Nd8 Rd8 48.Nc5 Nce5! 49.de5 Ne5 50.Ke4 Nc6 51.Rf2 Rd4 52.Ke3 Rd5 53.Ne4 Re5 54.Kf4 f6 55.Nd6 Rf5! 56.Ke3 Rf2 57.Kf2 Ne5 0–1. xtom – autentyczny, kurnik, 2011.

4.Na3 e6 5.e3 Nf6 6.h4 Ba3 7.Ba3 d6 8.Bb2 Ra1 9.Qa1 Nc6 (9...Nbd7 10.g4 Ng4 11.Bg7–/+) 10.Bd3 Bd7 11.h5 h6 12.Nf3 (12.Bf6!? Qf6 13.Qf6 gf6 14.Nf3–/+) 12...e5–+ 13.Nh4 0–0 14.f4 Qa8 15.Qd1 (15.fe5 Qa1 16.Ba1 de5–+) 15...Bg4 16.Be2 Be2 17.Qe2 (17.Ke2 Qa2 18.Qb1 Qe6–+) 17...Qa2 18.Bc1 (18.Bc3 Ne4 19.0–0 Qc2–+) 18...Qb1 (18...ef4 19.Qb5–+) 19.Kf2 (19.0–0 Qc2 20.fe5 Ne5–+) 19...Qc2 (19...ef4 20.ef4 Qc2 21.g3–+) 20.f5 (20.d3 Qe2 21.Ke2 ef4 22.ef4 Nd4 23.Kd1–+) 20...Ne4 21.Kf3 Ng5 22.Kf2 Nb4 23.g4 Nd3 24.Kg3 Nc1 25.Rc1 Qc1 26.Nf3 Nf3 27.Kf3 Qh1 28.Kg3 e4 29.Qc4 Qf3 30.Kh2 Qg4 31.Kh1 Qh5 32.Kg2 Qf5 33.Qc7 Qf3 34.Kh2 Qe2 35.Kg3 Qd2 36.Kf4 Qf2 37.Ke4 Re8 38.Kd5 Qe3 39.Kd6 Qe5 40.Kd7 Re7 41.Kc8 Qc7# 0–1. xtom – capitanjack (1670), kurnik, 2012.

4.Nf3 ab2 5.Ra8 Nc6 6.d4+=.

4.Nf3 Nf6 5.e3 Nc6 6.Nc3 (6.Ra3!? Ra3 7.Ba3–/+) 6...e5–+ (6...ab2 7.Ra8 e5 8.Qb1+=) 7.Ne5? (Better is 7.Nb5 e4 8.Ng1–+) 7...Ne5 (8.Nb5 Ng6–+ (8...ab2?! 9.Ra8 Nd5 10.Ra2–+); 7...ab2?! 8.Ra8 Ne5 9.Qb1–+) 0–1. Deneuville,Christian – van Rooijen,Peter, corr or02–026, 2003.

3.c3 bc3

4.Nc3 d5 5.d4 Nf6 6.e3 b6 7.a4 e6 8.Nf3 Bd6 9.Bd3 Ba6 10.0–0 0–0 11.Qc2 Bd3 12.Qd3 Na6 13.Na2 c5–+ 14.dc5 Nc5 15.Qb5 Na4 16.Nc3 Ra5 17.Qa4 Ra4 18.Ra4 Nd7 19.Nb5 Be7 20.Rd1 Bf6 21.Ba3 Nc5 22.Ra7 Qb8 23.Rc7 Re8 24.Bc5 bc5 25.Rc5 Be7 26.Nc7 Bc5 27.Ne8 Qe8 28.Rc1 Qb5 29.Nd4 Qb2 30.Ne2 (30.Rd1–+) 0–1. super knight (1610) – spereira (1920), internet, 2005.

4.Nc3 d5 5.Nf3 –/+.

4.Nc3 e6 5.e3 Bb4 6.Qg4= Bf8 7.Bd3 Nf6–/+ 8.Qf3 Be7 9.Nh3 0–0 10.Nf4 Ba3 11.Ba3 Ra3 12.g4 g5 13.Nh5 Nh5–/+ 14.gh5 f5 15.Rg1 h6 16.h4 Qf6 17.hg5+/– hg5 18.Ke2 g4 19.Qf4+= Nc6 20.h6 Ne5 21.h7 Kh8 22.Qb4=+ Ra8 23.Bc2 Nf3 24.Rh1=+ b6 25.Rh5 Ng5 26.Rg5? (26...Ba6 27.Bd3 Bd3 28.Kd3 Qg5 29.Rh1–+; better is 26.Qf4 Ba6 27.Kd1=+). Zylla,Johannes – Thon, BS–Kreismeisterschaf, 1992.

4.Nc3 e6 5.Ne4 d5 6.Ng3 Nd7 7.Nf3 Ngf6 8.e3 Be7 9.Be2 0–0 10.0–0 c5 11.d4 c4 12.a4 b6 13.Ne5 Ba6?? (Better is 13...Ne5 14.de5 Nd7–/+) 14.Nc6+/– Qe8 15.Ne7 Qe7 16.Ba3 Qd8 17.Bf8 Qf8 18.a5 b5 19.h3 h6 20.Qc2 Qb4 21.Rfb1 Qd6 22.Qc3 e5 23.de5 Qe5+= 24.Qc2 Nc5 25.Bf3 Nb3 26.Ra2 Rd8 27.e4?? d4 28.Nf5? d3–+ 29.Qd1 Ne4 30.Be4 Qe4 31.Ne3 Qe6 32.Kh2? b4 33.g3 d2 34.Rc2?? c3–+ 35.Rb3 Qb3 36.Nf5 Be2! 0–1. maxim – cowface, Live Game Caissa's Web, 2004.

4.Nc3 Nf6

5.e4 d5 6.ed5 Nd5 7.Bb5 c6 8.Bf1 –/+.

5.e4 d5 6.ed5 Nd5 7.Nf3 –/+.

5.e4 d6

6.Bb5 Bd7 7.Bd7 Nbd7 –/+ (< 7...Kd7 8.Qb3=).

6.Bc4 c6 7.Qb3 e6 8.Nf3 d5 9.Bd3 Nbd7 10.e5 Ng4 11.Ne2 Qc7 12.Qc3 Bc5 13.0–0 Qb6 14.Ned4 Ra4 15.Rfe1? Nde5!–+ 16.Bc2? Nf3 (17.Qf3 Qb2 18.Ba4 Qd4–+) 0–1. Pietrzak,Wojciech – Van Rooijen,Peter, Orang–Utan Invitational, 2002.

6.Bc4 e5 7.d4 =+.

6.Bc4 e6–/+ 7.Nf3 g6 8.0–0=+ Bg7 9.d4 0–0 10.e5 de5 11.de5 Nfd7 12.Ne4 Nc6–/+ 13.Nf6 Nf6 14.Qd8 Rd8 15.ef6 Bf8 16.a4 Na5 17.Be2 Bd7 18.Nd4 Bc5 19.Rfd1 Bd4 20.Bd4 Nb3 21.Rab1 Ba4–+ 22.Bc3 Rd1 23.Bd1 Nc5 24.Bf3 Bc2 25.Ra1? Ra1–+ 26.Ba1 Be4 27.Bd4 Bf3 28.Bc5 Bd5 29.f4 h6 30.h4 g5 31.fg5 hg5 32.h5 Kh7–+ 33.Kf2 g4 34.Kg3–/+ Kh6 35.Kg4 Bg2 36.Bf8 Kh7 37.Kg5 b6 38.Be7 c5 39.Bd8 b5–+ 40.Bb6 c4 41.Ba5 Bf3 42.Bc3–/+ Kg8 43.Bb4 c3?? 44.Bc3= Kf8 45.Bb4 Ke8 46.h6+/– Be4 47.Kf4 Bg6 48.Ke5 Kd7 49.Kd4 Kc6 ½–½. Baluch,Wieslaw – Gajda,Leszek, corr 2. AMM Poland , 1994.

6.d4 d5 7.Bd3 Nc6 –/+.

2.b5 a4

3.a3 c5 4.c4 d5 5.cd5 Qd5 6.Nc3 Qb3 7.Rb1 Qd1 8.Nd1 b6 9.Nf3 Nd7 10.g3 e5 11.d3 f5 12.Nc3 Ngf6 13.Bg2 Ra7 14.0–0 Bd6 15.Nd2 0–0 16.Nc4 Bc7 17.Bb2 f4 18.Ne4 Ne4 19.Be4 Nf6 20.Bg2 Re8 21.Rfe1 Bd7 22.Bc3 g5 23.e3 g4? 24.gf4+– Be6 25.Ne5 h5?? 26.Nc6 Nd5 27.Ba1 Raa8 28.e4 Ne7? 29.f5 Bb3 30.Ne7 Re7 31.e5 Rd8 32.f6 Re6 33.Re3 Kf7? 34.Rbe1 Kg6 35.Be4 Kg5 36.h4! Kh4 37.Bf5 Ree8 38.e6 Bf4?? 39.Re4 Bg5? 40.e7 Ra8 41.Kg2 Bf6 42.Bf6# 1–0. ferminkatcho (1680) – madera110 (1680), kurnik, 2011.

3.a3 e6 4.Bb2 d5 5.Nf3 Bc5?? (5...Nf6 6.e3=) 6.d4 (better is 6.Bg7 e5 7.Bh8+–) 6...Bd6 7.e3 Nf6 8.c4 Ng4 9.c5 Be7 10.h3 Nf6 11.Bd3 0–0 12.Nbd2 g6 13.0–0 b6 14.c6 Nh5 15.Ne5 Bd6 16.f4 f6 17.Nef3 Ng3 18.Re1 f5 19.Nf1 Ne4 20.Be4 (20.Bc2!?+/–) 20...fe4= 21.Ne5 Qh4 22.Qg4? Qg4–/+ 23.hg4 Be5 24.de5 Ra5 25.Bc3 Rb5 26.Bb4 Rf7 27.Rac1 Ba6 28.Nd2 Bc8 29.Nb1 Na6–/+ 30.Nc3 Rb4 31.ab4 Nb4 32.Na4 Nd3 33.Nc3 Ne1 34.Re1 Ba6 35.Ra1 Bc4 36.Ra7 Kg7 37.Kf2 h6 38.Ke1 g5 39.g3 Kg6 40.Kf2 Re7 41.Ra8 Rg7 42.Rd8 Re7 43.Rd7 Kf7 44.Rd8 b5 45.Rb8 gf4 46.gf4 Kg6 47.Nb5 Bb5 48.Rb5 h5 49.Kg3 hg4 50.Kg4 Rh7 51.Rb7 Kh6 52.Rb8 Kg6 53.Re8 Kf7 54.Rd8 Kg6 55.Rd7 Rh1 56.Rc7 Rg1 57.Kh3 Re1 58.Re7 Re3 59.Kg4 Rc3 60.Re6 Kf7 61.Rd6 Rc5 62.e6 Ke7+/– 63.Rd7 Ke6 64.Rc7?? Kd6–+ 65.Rc8 e3?? 66.Kf3= d4 67.Ke4?? e2–+ 68.Kd3 e1Q 69.Rd8 (69.Rd8 Ke7 70.Rd7 Ke6 71.f5 Kf6 72.Rd6 Kg5 73.Rg6 Kf4 74.Rg4 Kg4 75.Kd4 Qc3 76.Ke4 Re5). bratek55 (1720) – kosovaaaa (1630), kurnik, 2011.

3.Ba3 d5 4.Nf3 Nf6 5.e3 g6 (5...Bg4 6.Be2=) 6.Nc3 (6.c4 Bg7=) 6...Bg7 7.d4 0–0 8.Rb1 Nbd7 9.Be2 Re8 10.Ne5 Ne5 11.de5 Nd7 12.f4 e6 13.0–0 Nb6 14.Bc5 Nd7 15.Bd4 c5 16.bc6 bc6 17.e4 Bf8 (17...g5 18.ed5 ed5 19.Bd3=) 18.ed5 (18.Qd2 Ba6+=) 18...ed5= 19.Bg4 Qa5 20.Kh1 Bc5 21.f5 Ne5+= 22.fg6 hg6 23.Bc8 Rac8 24.Bc5 Qc3 25.Bd4 Qa3 26.Rb7= Qa2 27.Be5+/– Re5 28.Rff7 Rce8 29.Rg7 Kh8 Threatening mate... how? 30.Qf1 Rf5 31.Qc1 Rh5 32.Qf1?? Qc2?? 33.Rg8!! Kg8 Decoy theme: g8 34.Qf7 Theme: Double Attack 34...Kh8 35.Qg7 (35.Qe8) 1–0. Mueller,Oe – Broendbo,Ivar, corr Norway (year?).

3.Ba3 Nf6 4.e3 d5 5.Nf3 g6 6.c4 Bg7 7.d4 c6 8.Nbd2 0–0 9.Bd3 Nbd7 10.cd5 cd5 11.Rc1 Nb6 12.0–0 Bg4 13.h3 Bf3 14.Qf3 Re8 15.Qg3 Nfd7 16.Qc7 Qc7 17.Rc7 Rab8 18.f4 Bf6 19.Nf3 Rec8 20.Rfc1 Rc7 21.Rc7 Kf8 22.Ne5 Be5 23.fe5 Ke8 24.Rc1 Rc8 25.Rc8 Nc8 26.Kf2 Ndb6 27.Ke2 Nc4 28.Bc4 dc4 29.Kd2 Na7 30.b6 Nb5 ½–½. de Cat (2075) – Nielsen,JM (1970), 1997.

3.Na3 b6 4.e3 e6 5.Be2 Ba3 6.Ba3 Nf6 7.Nf3 Nd5 8.c4 Nf6 9.0–0 d6 10.d4 0–0 11.Bd3 c6 12.Qc2 c5 13.Qc3 d5 14.dc5 bc5 15.Bc5 Re8 16.a3 Nbd7 17.Bd4 Nh5 18.g4 Nhf6 19.g5 Nh5 20.Ne5 f5 21.gf6 Nhf6 22.Nd7 Bd7 23.Kh1 Ne4 24.Be4 de4 25.Rg1 e5 26.Be5 Re7 27.Bg7 Qe8 28.Bh6 Kf7 29.Rg7 Ke6 30.Rg5 Bc8 31.Re5 Kd7 32.Rd5 Kc7 33.Bf4 Kb7 34.Qd4 Qh5 35.Rg5 Qf3 36.Rg2 Rd7 37.Qc5 Rg7 38.Qc6 Ka7 39.b6 Ka6 40.Qb5 Kb7 0–1. jarmuta – 30sectv, kurnik, 2012.

3.Bb2 b6 4.Nf3 e6 5.g3 Ra5 6.c4 c6 7.Bc3 Ra7 8.Bg2 Bc5?? (better is 8...Nf6+/–) 9.Bg7+– d5 10.cd5 cd5 11.0–0 Ra5 12.d4 Bb4 13.a3 Bd6 14.Nc3 Nd7 15.Bh8 Nh6 (15...Ngf6 16.Qc2+–) 16.Qd3 Qe7 (16...Ng4 17.Qh7 Ngf6 18.Qh6+–) 17.Qh7 Nf5 (17...Ng4 18.e4 Ba3 19.Qg8 Qf8 20.Qg4+–) 18.g4 Nd4 19.Nd4 Nf8 20.Qh6 Ng6 21.Nc6 Qh4 22.Qh4 Nh4 23.Na5 ba5 24.Bf6 Ng2 25.Kg2 Bb7 26.Rfd1 d4 27.f3 Bc5 28.Ne4 Bb6 29.Nd6 Kd7 30.Nb7 Kc7 31.Nd8 Kd7 32.Nc6 Kd6 33.Bd4 Bc7 (33...e5 34.Bb6 Ke6 35.Rac1 e4 36.Nd4 Ke5 37.Rc5 Kf6 38.Rc6 Kg5 39.h4 Kf4 40.Bc7 Ke3 41.Rc3) 34.Rac1 (34.Be3) 34...Kd7 (34...e5 35.Be5 Ke6 36.f4 Be5 37.Ne5 Ke7 38.Rd7 Kf6 39.Rc6 Kg7 40.Rf7 Kg8 41.Rc8) 35.Bf6 Ke8 (35...Kc8 36.Ne7 Kb7 37.Rd7 Kb6 38.Rdc7 Kb5 39.R1c6 e5 40.Rb7) 36.Ne5 Bb6 (36...Kf8 37.Rc7 Kg8 38.Rd8 Kh7 39.Rh8) 37.Rc8 Bd8 38.Rcd8# 1–0. ecluschei (2670) – jklaassen (1780), net–chess.com, 2015.

3.Bb2 d5= 4.e3 Nf6 5.c4 c6 (5...Nbd7 6.cd5 Nd5 7.Nf3=) 6.a3 (6.Nf3 e6+=) 6...Bf5 7.d4 (7.Nf3 Nbd7=) 7...e6 (7...cb5 8.cd5 Qa5 9.Qd2 Nd5 10.Qa5 Ra5 11.Nd2=) 8.Nc3= Qa5 9.Bd3 Bd3 10.Qd3 cb5 11.cb5 Nbd7 12.Nf3 Bd6 13.0–0 0–0 14.Nd2 Qc7 (14...Rfc8 15.e4 Bf4 16.e5 Bd2 17.Qd2+=) 15.h3 (15.Rac1!? Qb6 16.Rc2=) 15...Nb6+= 16.Rfc1 Qe7 17.e4 de4 18.Nce4 Ne4 19.Ne4 Nd5 20.Rc4 Rfd8 21.Rac1 f5 (21...Bf4 22.Re1=) 22.Nc5 Nb6 23.R4c2 Bc5 (23...Nd5 24.Re1 Bc5 25.Rc5+= (worse is 25.dc5 Nb4 26.Qf5 Qd7+=)) 24.Rc5+= Rd7 25.Qg3 Nd5 26.Rc8 Rc8 27.Rc8 Kf7 28.Qf3 Kg6 29.Qg3 Qg5 30.Qe5 Qf6 31.Qg3 Kf7 32.Rc5 f4 33.Qd3 Qg6 34.Qd1 Qf5 (34...Rd8 35.Bc1=) 35.Qa4 f3 36.Qc2 Qg5 (36...fg2!? 37.Qf5 ef5+=) 37.g3+/– b6 38.Rc6 Nf4? (38...g6 39.a4+/–) 39.Qe4 (better is 39.Qh7 Ne2 40.Kh2 Ng3 41.Qd3+/– (41.fg3?? Qd2 42.Kg1 Qg2)) 39...Nh3+/– 40.Kh2 Qh6? 41.Qf3+– Ke7 42.Kg2 Ng5 43.Qg4 Qg6 44.Rb6 h6 45.Bc1 Qf6 46.Be3 Kf7 47.a4 Qe7 48.a5 Rb7 49.Bg5 (49.Bg5 hg5 50.Qf3 Kg6 51.Qb7 Qe8 52.a6 Kh7 53.a7 Qg6 54.a8Q g4 55.Qe4 Qe4 56.Qe4 g6 57.Qe6 Kg7 58.Qf6 Kg8 59.Rb7 g5 60.Qg7) 1–0. Jonsson,Pall G (1800) – Bjarnason,Saevar (2100), Reykjavik ISL, Open, 2014.

3.Bb2 e6 4.a3 b6 5.c4 1–0. Schirmer – Gunschmann, 1989.

3.Bb2 f6 4.c4 (4.e4 e5+=) 4...e5= 5.a3 Bc5 (5...d5 6.cd5 Qd5 7.Nc3=) 6.Nc3+= Ne7 7.Na4 Ba7 8.e3 0–0 9.Nc3 d5 (9...Bb6 10.Nf3+/–) 10.Nf3 (10.cd5!? Qd6 11.Bc4+–) 10...d4+= 11.Ne2 c5 12.ed4 cd4 13.d3 Bc5 14.g3 b6 (14...Bf5!? 15.Bg2 Qa5 16.Nd2 Ra7+=) 15.Bg2+= Ra7 16.Nd2 Nd7 17.0–0 Bb7 18.Ne4 h6 19.f4 f5 (19...Nf5 20.Bc1+=) 20.Nc5 Nc5? (better is 20...bc5 21.Bb7 Rb7 22.fe5 Ne5+/–) 21.fe5+– Bg2 22.Kg2 Qa8 23.Kg1 Ng6 24.Nf4 Ne5 25.Bd4 Ng4 26.Nd5 Ra3 27.Ra3 Qa3 28.Bc5?? Qc5+/– 29.Kg2 Rd8 30.Qf3 Qd4 31.Qf5 Qb2?? 32.Kh3 Ne5 33.Rf2 Qd4 34.Qe4 Qf2+= 35.Qe5 Qf1 36.Kh4 Qf7?? 37.g4 g5 38.Kg3+/– Re8?? 39.Nf6+– Kf8 40.Qe8 (40.Qe8 Qe8 41.Ne8+–) 1–0. carocan (1750) – jirka44 (1685), kurnik, 2011.

3.c4 a3 4.Qb3 h5 5.Ba3 h4 6.e3 h3 7.Nh3 Rh3 8.gh3 d6 9.Nc3 e5 10.Bg2 Nd7 11.0–0 Qg5 12.Ne4 Qg6 13.f4 Ndf6 14.Kh1 Ne4 15.d3 Nd2 16.Qc3 Nf1 17.Rf1 f6 18.e4 Qh5 19.f5 Qe2 20.Qb3 b6 21.c5 Ne7 22.cd6 cd6 23.Bd6 Ra2 24.Rg1 Rb2 25.Qc4 Rc2 26.Qb4 Qd3 27.Bc7 Bb7 28.Bb6 Rc4 29.Qb1 Be4 30.Be4 Qe4 31.Qe4 Re4 32.Bc7 Nd5 33.b6 Rb4 34.Rd1 Nb6 35.Rd8 Kf7 36.Rb8 Nd5 37.Rb4 Nb4 38.Kg2 Nd5 39.Bb8 Ne3 40.Kf3 Nf5 41.Ke4 Ke6 42.Ba7 g5 0–1. horacyad2010 – grunt1, kurnik, 2012.

3.c4 b6 4.Nc3+= a3 5.d4 Bb7 (5...Nf6 6.Qb3+=) 6.e4 e6 7.Bd3 Bb4 (7...f5 8.f3+=) 8.Bd2 (8.Nge2 Nf6 9.Rb1 Qe7+/–) 8...Ne7 (8...f5 9.Nge2+=) 9.Nf3 d6 (9...f5 10.ef5 Nf5 11.Rb1+=) 10.0–0 Nd7 (10...0–0 11.Qb3 c5 12.bc6 Nbc6 13.d5+–) 11.Qb3 Bc3 12.Bc3 0–0 13.Bb4 Ng6 14.Rae1 (14.Ba3 Nf4 15.Bc1 Nd3 16.Qd3 f5+/–) 14...e5+= 15.Ba3 (15.de5 Nde5 16.Ne5 Ne5+=) 15...Nf4 (15...ed4!? 16.Nd4 Nge5+=) 16.de5+/– Nc5 (16...Nd3 17.Qd3 Ne5 18.Ne5 de5 19.Qe3+=) 17.Bc5+– bc5 18.ed6 Qd6 19.Bb1 Qg6 20.g3 Nh3 21.Kg2 Nf4 22.Kh1 Ne6 23.Qe3 Ra4 24.Rc1 f5 25.ef5 Qg4 26.Qe6 Kh8 27.Rc3 Bf3 28.Kg1 Be2 29.Rfc1 Rd8 30.Qe7 Qd4 31.Qe2 Rb4 32.Re3 (32...Rf8 33.Re8+–) 1–0. Registration (2380) – KCMO (1850), ICC, 2003.

3.c4 c5 (--> 2.b5 c5 3.c4 a4).

3.c4 d6 4.Nc3 g6 5.Na4 Bg7 6.Nc3 Nf6 7.d4 0–0 8.Bg5 c6 9.e4 Qa5 10.Qd2 Re8 11.Bd3 Nbd7 12.Nf3 Nb6 13.bc6 bc6 14.Nd1 Qa4 15.Nb2 Qa3 16.0–0 c5 17.Rfb1 Bg4 18.dc5 dc5 19.Ne1 Red8 20.Nc2 Qa6 21.Qe3 Be6 22.Qc5 Rd3 23.Nb4 Qa7 24.Bf6 Rd2 25.Nc6 Qd7 26.Ne7 Kh8 27.Qe5 Qe7 28.Bg7 Kg8 29.Bh6 f6 30.Qb5 Rd6 31.c5 Bd7 32.cd6 1–0. aspasio – MileEndMaster, ICC, 1999.

3.c4 h5 4.Nc3 e6 5.e4 g6 6.Nf3 Bg7 7.d4 Ne7 8.Bd3 b6 9.0–0 Bb7 10.Na4 d6 11.Re1 Nd7 12.Be3 Nf6 13.Nc3 Ng4 14.Bg5 f6 15.Bd2 e5 16.Nd5 Nd5 17.ed5 Kf7 18.h3 f5 19.Ng5 Kg8 20.Ne6 Qh4 21.Re2 (21.hg4?! hg4 22.Kf1 Qh1 23.Ke2 Qg2+=) 21...e4 (21...f4 22.Qc2+– (22.hg4 hg4 23.f3 Qh1 24.Kf2 g3; 22.Ng7?! Kg7 23.Be1 Qg5+–)) 22.Bg5 (22...Nf2 23.Rf2+– (23.Bh4?! Nd1 24.Rd1 ed3 25.Rd3 Rc8+–); 22.hg4?? hg4 23.Bh6 Rh6 24.f3 g3 25.Ng7 Qh1#) 1–0. marre (1975) – beda (1965), GameColony.com, 2003.

3.c4 Nh6 4.Nc3 (4.d4 Ng4+=) 4...a3 (4...e6 5.Na4 d5 6.c5+=) 5.d4+/– e6 6.e4 b6 (6...Bb4 7.Nge2+=) 7.Nf3 Bb7 8.Bd3 f6 9.0–0 Nf7 10.Be3 (10.Rb1 e5+/–) 10...g6 (10...Bb4 11.Qb3 Qe7 12.Rab1+/–) 11.c5 (11.Qb3 f5+/–) 11...Bg7 (11...f5 12.Rc1+/–) 12.d5 bc5 (12...ed5 13.Nd5 Bd5 14.ed5+/–) 13.Bc5 e5 (13...ed5 14.Nd5 d6 15.Bd4+/–) 14.Qc2 (14.Na4 Bf8+/–) 14...d6 (14...Bf8 15.Be3+/–) 15.Be3 Nd7 16.Nd2 (16.Rac1 Bh6+/–) 16...g5 (16...Bh6 17.Bh6 Nh6 18.Rac1+/–) 17.Rac1+– h5 (17...f5 18.ef5 Nb6 19.Be4+–) 18.Ncb1 Nc5 (18...Rc8 19.Nc4+–) 19.Bc5 dc5 20.Qc5 Rc8 (20...Bf8 21.Qc7 Nd6 22.b6+–) 21.b6 cb6 22.Bb5 Bc6 23.Bc6 Rc6 24.Qc6 Kf8 25.Qe6 Nd6 26.Nc4 Nb7 27.Nb6 (27...Qe7 28.Rc8 Nd8 29.Rd8 Qd8 30.Nd7 Qd7 31.Qd7+–) 1–0. orane – 10yearoldgirl, Caissa.com, 2006.

3.d4 d5 4.e3 c5 (4...Bf5 5.c4=) 5.c4 (5.dc5 e6+=) 5...e6= 6.Nf3 Nf6 7.Nc3 cd4 (7...Ne4 8.Bd2=) 8.ed4 (8.Qd4 Be7+=) 8...dc4 9.Bc4 Bb4 10.Bd2 a3 (10...0–0 11.0–0= (worse is 11.Na4 Bd2 12.Nd2 Qd4–/+)) 11.0–0+= 0–0 12.Qb3 Bd6 13.Nb1 (13.Rad1 b6+=) 13...Qe7 (13...b6 14.Rc1=) 14.Nc3 (14.Re1 Nbd7+=) 14...Nbd7 (14...Qd8 15.Rad1+=) 15.b6 Qd8 16.Rab1 Re8 17.Rfc1 Nf8 18.Qc2 (18.Nb5 Qb6 19.Nd6 Qd6+=) 18...Bd7 (18...N8d7 19.Na4=) 19.Nb5 (19.Bg5 Rc8 20.Qe2 Be7+=) 19...Bc6 20.Nd6 Qd6 21.Bb4 Qd8 ½–½. Woschkat,Karl_Heinz – Roever,L, corr SOK–87–10, 1987.

3.e3 Ra5 4.d4 b6 (4...Nf6 5.Bd2 Ra8 6.Bd3=) 5.Ba3 (5...Bb7 6.Bb4+=; 5.Bd3 Bb7 6.Nf3 Nf6+=). Netsurferdude – Ruthless Rook, ChessWorld.net, 2005.

3.e3 c5 4.c4 d5 5.Bb2 e6 6.cd5 ed5 7.Nc3 d4 8.ed4 a3 9.Bc1 cd4 10.Ne4 d3 (10...f5 11.Ng3 d3–/+) 11.Qb3 (better is 11.Qf3=) 11...Qe7 12.Bd3 f5 13.Ne2 (13.Qc2 Nd7 (13...fe4? 14.Qc8 Kf7 15.Bc4 Kf6 16.Bd5+–) 14.Ba3 Qa3–/+) 13...fe4 14.Bc4 Nf6 15.0–0 Bf5 (15...Nbd7 16.d3–+) 16.f3 (16.Ng3 Bg6–+) 16...ef3 (16...Qc5 17.Kh1–+) 17.Rf3 Qe5?? (better is 17...Be4 18.Rf2 Qb4–+) 18.Re3 Bc5 19.d4 Qe3?? (better is 19...Bd4 20.Nd4 Be4+–) 20.Be3 (worse is 20.Qe3 Be7 21.Qe5 Bc8 22.Ba3 Ra3+–) 20...Be7 21.Bf7 Kf8 22.Rf1 Be4 (22...Bd7 23.Nf4 Ra5 24.Bg6 hg6 25.Ng6 Ke8 26.Nh8 Rb5 27.Qf7 Kd8 28.Qg7+–) 23.Qe6 (better is 23.Bh5 Bg6 24.Bg6 hg6 25.Qe6+–) 23...Bd3 (23...Bd5 24.Qf5 Bf7 25.Qc8 Be8 26.Bd2+–) 24.Re1 (24.Rf6 Nd7 25.Bg6 Bf6 26.Qf7) 24...Bb5+– 25.Qc8 Kf7 26.Qh8 Bf8 27.Bg5 Nbd7 28.Nc3 Bc6 29.d5?? (better is 29.Bd2+–) 29...Bc5–+ 30.Kh1 (30.Be3 Be3 31.Re3 Rh8 32.dc6 bc6–+) 30...Rh8 31.dc6 bc6 32.Nb1 (32.Bf4 Nd5 33.Nd5 cd5–+) 32...Ng4 33.h3 Nf2 34.Kh2 Bd6 35.g3 Ne5 36.Na3 (36.Rf1 Kg6 37.Rf2 Kg5–+) 36...Nf3 (36...Nfd3 37.Re3 Ba3 38.Bf4–+) 37.Kg2 Ne1 38.Kf2 Ba3 39.Ke1 Ra8 40.Kd1 (40.Bf4 Bb4 41.Ke2 Ra2 42.Kd3 Ra3 43.Ke2 Ke6–+) 40...Bd6 0–1. mikebaldini (1680) – franchessco88 (1680), gameknot.com, 2015.

3.e3 e6 4.c4 Be7 5.Bb2 Bf6 6.Bf6 Nf6 (worse is 6...gf6 7.Nc3+/–) 7.a3 0–0 8.Nc3 d5 9.Na4 dc4 10.Bc4 Nd5 11.Ne2 (11.Nf3 c6+/–) 11...Bd7 (11...Ne3!? 12.de3 Qd1 13.Kd1 Ra4+=) 12.Nc5 Be8 (12...c6 13.Qb3+/–) 13.a4 (13.Nb7 Qe7 14.d4 Ra3+–) 13...Qd6 14.Ne4 Qe5 15.N4c3 c6 16.0–0 cb5 17.ab5 Ra1 18.Qa1 Nd7 (18...Nc3 19.Qc3 Qg5 20.Rc1+–) 19.Nd5 (19.Bd5!? ed5 20.Qa7 Qd6+–) 19...ed5 20.Qe5 (better is 20.Bb3!? Qa1 21.Ra1+–) 20...Ne5+= 21.Bd5 Bb5 22.Re1 Rd8 (22...Be2 23.Re2 Nd3 24.e4+=) 23.Bb7 Rd2 24.Nd4 Bc4 25.h3 Nd3 26.Ra1 g6 27.Bf3 (better is 27.Ra4!? Be6 28.f4+/–) 27...Nf2= (27...Rf2? 28.Ra4 Be6 29.Ne6 fe6 30.Rd4+–) 28.Ra8 Kg7 29.Nc6 Nd3 30.Ra7 Kh6 31.Rd7 Rb2 32.Rc7 Rb1 33.Kh2 Ne1 (better is 33...Re1!?=) 34.Ne5+/– Nf3 35.gf3 Be6 36.Nf7 Bf7 37.Rf7 Rb5 38.h4 Rf5? (better is 38...Rb3!? 39.Re7 g5+/–) 39.Rf5+– gf5 40.Kg3 Kg6 41.Kf4 Kf6 42.h5 h6 43.e4 fe4 44.fe4 (44.Ke4 Ke6 45.f4 Kf6+–) 44...Kg7 45.Kf5 Kf7 46.e5 Kg7 (46...Ke7 47.Kg6+–) 47.e6 Kf8 48.Kf6 Ke8 49.e7 Kd7 50.Kf7 1–0. mvb9999 – mikebaldini, gameknot.com, 2013.

3.e4 c6 (--> 1.b4 a5 2.b5 c6 3.e4 a4).

3.e4 e5 4.Nf3 Bc5 5.Bc4 (< 5.Ne5 Bd4 6.Nf7 Qf6–/+) 5...d6 6.0–0 Nf6 7.d3 Bg4 8.h3 Bh5 9.Qe2 c6 10.g4 Bg6 11.g5 (11.Nc3 0–0=) 11...Nfd7=+ 12.c3 Bh5 13.bc6 Nc6 14.Kg2 h6 15.gh6 Qf6 16.Be3 gh6 (16...Be3 17.Qe3 Nb6 18.Bb5=+) 17.Nbd2=+ 0–0–0 (17...Be3 18.fe3 Rg8 19.Kf2=) 18.Rab1= Rhg8 19.Kh2 Rg6 20.Kh1 (20.Rg1 Rdg8=) 20...Rdg8 21.Bd5 Bf3 (21...b6!?=) 22.Nf3+= Be3 23.fe3 Nc5 24.Nh2 Qh4 25.Rf7 Rg2? (better is 25...Nd8 26.Rf3 Rg2 27.Qg2 Rg2 28.Kg2 Nd3+=) 26.Qg2+– Rg2 27.Kg2 Nd3?? (better is 27...Qg5 28.Ng4 Ne7+/–) 28.Rbb7+– Qg5 (28...Ne1 29.Kf1 Qh3 30.Ke1 Qe3 31.Kf1 Qh3 32.Kg1 Qg3 33.Kh1 Qe1 34.Nf1 Qf1 35.Rf1 Kb7+–) 29.Ng4 Ne1 (29...Nc5 30.Rbc7 Kd8 31.Bc6+–) 30.Kf1 (30...Qe7 31.Bc6 Qf7 32.Rf7+– (32.Ke1?! Qa2 33.Nh6 Qc4+/–)) 1–0. kamret (2180) – wendol (2010), GameColony.com, 2003.

3.e4 e6 4.Nf3 Nf6 5.e5 Ng8 6.d4 d6 7.Bd3 Nd7 8.0–0 de5 9.de5 (9.Ne5?! Ne5 10.de5 Qd4=) 9...Nc5 10.Bc4 Qd1 11.Rd1 Ne7 12.Nc3 Ng6 13.Be3 h6 (13...b6 14.Bd3+=) 14.Rd2 Be7 15.Rad1 0–0 16.h4 Re8 17.Kh2 b6 18.h5 Nf8 19.Bc5 Bc5 20.Bd3 Bb4 21.Be4 Bc3 22.Rd3 Ra7 23.Rc3 Bd7 24.Nd4 Rc8 25.Rcd3 Ra5 26.c4 a3 (26...Be8 27.g4+–) 27.Nb3 Ra4 28.Rd7 Nd7 29.Rd7 Rc4 30.Nd4 Rb4 31.Nc6 Re4 32.f3 Re2 33.Ne7 Kh7 34.Nc8 Ra2? (better is 34...Re5 35.Rc7 Rh5 36.Kg1 Rb5+/–) 35.Rc7+– (35.Rf7?! Rg2 36.Kg2 a2 37.Nb6 a1Q=) 35...Re2 36.f4 (36.Nb6?! Re5 37.Ra7 Rh5 38.Kg3 Rb5+/–) 36...Re4 37.Rf7 (better is 37.Nb6 Rf4 38.Nd7+–) 37...Ra4+/– 38.Nb6 a2 39.Na4 a1Q 40.Nc5 Kg8 (better is 40...Qe1!?=) 41.Rc7 Qc1?? (better is 41...Qe1 42.Rc8 Kf7+/–) 42.Ne6+– Qe3 (42...Qe1 43.Rg7 Kh8 44.Rg3+–) 43.Rg7 Kh8 44.Rg6 Qf2 45.Rh6 Kg8 46.Kh3 Qb2 47.Rg6 Kh8 48.g4 Qb5 49.Kh4 Qb4 50.Kg5 Qe7 51.Rf6 Kh7 52.Nf8 Kg8 53.Ng6 Qd8 54.Kh6 Qe8 55.e6 Qb8 (55...Qd8 56.e7 Qe7 57.Ne7 Kh8 58.Rf8#) 56.e7 Qf4 57.Nf4 (57.Rf4=) 1–0. b4_player (2240) – Raspoutine (2245), GameColony.com, 2003.

3.e4 Nf6 4.e5 Nd5 =.

3.e4 g5 4.Bb2 f6?? (better is 4...Nf6+/–) 5.Qh5# 1–0. pcmvr – michas, internet, 2005.

3.g3 c6 4.e4 e5 5.Nf3 d6 6.a3 Nf6 7.Nc3 Nbd7 8.d4 ed4 9.Qd4 Be7 10.Bd3 Qc7 11.0–0 Nc5 12.Bc4 Qd7 13.Be3 h6 14.e5 Nh7 15.Bh6 de5 16.Qd7 Bd7 17.Bg7 Rg8 18.Be5 Bg4 19.Nd4 Ng5 20.f3 (20.f4 Nd7 21.Rfe1 cb5 22.fg5 Ne5 23.Bb5 Kf8 24.Re5 Rg5+–) 20...Bh3 21.Rfe1 Rd8 22.Kf2 Rg6 23.Rad1 Kf8 24.g4 Ra8?! (24...Nd7 25.Bc7 Rc8 26.Re7 Ke7 27.Nf5 Ke8 28.Re1 Kf8 29.Bd6 Rd6 30.Nd6+–) 25.Kg3 Rh6 (25...cb5 26.Ncb5 Rc8+–) 26.Nf5 Rh7 (26...Rf6 27.f4 Rf5 28.gf5 Bf5 29.fg5+–) 27.Ne7 cb5 ½–½. Steinhaus – Peter, SFM, 1998.

3.a3 Ra5

4.e3 d6 5.Bb2 (5.d4 Nf6+=) 5...Bd7 (5...Nf6 6.Nf3=) 6.c4+= e5 7.Nc3 Ra7 (7...c6 8.bc6 Nc6 9.Na4+=) 8.Nf3 Bg4 9.Be2 Bf3 (9...Nf6 10.0–0+/–) 10.Bf3 Qe7 (10...Nf6 11.Na4 e4 12.Be2+/–) 11.0–0 Nd7 12.Na4 g6 (12...Qh4 13.d3+–) 13.Nc3 (13.b6 Nb6 14.Nb6 cb6+–) 13...Ngf6 14.Nd5 (14.d4 e4 15.Be2 Bg7+–) 14...Nd5+/– 15.Bd5 h5 (15...Nb6 16.d4+/–) 16.f4 Bg7? (better is 16...Nf6+–) 17.fe5 Be5 18.Be5 Ne5 19.d4 Ng4 20.Bf7 Qf7?? 21.Rf7 Kf7 22.Qf3 Kg7 23.h3 Nh6 24.a4 Nf5 25.a5 Rf8 26.Qe2 b6 27.a6 Raa8 28.Rf1 Rae8?? Attacks the backward pawn on e3 29.Kh2 Re3 30.Qb2 Rfe8 31.d5 Kh6 32.Qd2 h4 33.a7 Kh5 34.Rf5! gf5 35.a8Q! Ra8 36.Qe3 Rg8 37.Qe7 Rg6 38.Qc7 f4 39.Qb6 f3 40.gf3 Rg3 41.Qd6 Rf3 42.Qe5 Kg6 43.Qe4 Rf5 44.Qf5! Kf5 45.b6 (45.b6 Ke5 46.b7 Kf6 47.b8Q Kf5 48.d6 Ke5 49.d7 Kd4 50.d8Q Kc3 51.Qb1 Kc4 52.Qdd3 Kc5 53.Qbb5) 1–0. Fournier,Frederic – franek10000, Active (5/0), 2005.

4.e3 Nf6 5.Nf3 =.

4.e4 c6 5.bc6 dc6 6.Nf3 f6 7.Be2 e5 8.0–0 Nd7 9.d3 b6 10.Nfd2 f5 (Better is 10...Ra7!?=) 11.ef5+/– Nh6 12.Ne4 Nf5 13.Bg4 (13.Bh5!? Ke7 14.Bd2+/–) 13...Nc5 14.Nc5 Bc5 15.Bf5 Bf5 16.Bb2 0–0 17.Be5 Qg5 18.Nd2 Bh3 (Better is 18...Bg4!? 19.Qe1 Re8=+) 19.Bg3= Bf2?? (Better is 19...Bg4 20.Qc1 Qh5+=) 20.Rf2+– Raf5 21.Rf5 Bf5 22.Nf3 Qe3 23.Bf2 Qf4 24.Qf1 Bg4 25.Bg3 Qe3 26.Bf2 Qf4 27.Ne1 Qg5 28.g3 Rf6 29.Ng2 Rh6?? 30.Be3 Qh5 31.Bh6 Qh6 32.Re1 g6 33.Re8 Kg7 34.Qf8 1–0. valpa – dc, playchess.de, 2003.

3.a3 b6

4.Bb2 Ra5 5.c4+= c6 6.Bc3 (6...Ra8 7.Nf3=). shirehorse – Ruthless Rook, ChessWorld.net, 2005.

4.Bb2 Bb7 5.e3 e6 6.Nf3 d5 7.c4 Nf6 8.Be2 dc4 9.Bc4 Nbd7 10.0–0 (10.Nc3 Bd6+=) 10...Be7 (10...Bd6 11.Nc3=) 11.d4 0–0 12.Nbd2 c5 13.dc5 Bc5 14.Qe2 Ne4 (14...Qe7 15.Rfd1=) 15.Ne4+= Be4 16.Rfd1 Qc7? (16...Qe7 17.Bd3 Bd5 18.Rd2=) 17.Bd4?? (better is 17.Ng5 Bf5 18.e4+–) 17...Rfc8 (better is 17...Bd6 18.Ng5 Bf5=) 18.Rac1?? (18.Ng5 Be7 19.Be6 Bg5+/–) 18...Qb7?? 19.Bc5 Nc5 20.Rc3 Nb3 21.Qb2 Bf3+= 22.gf3 Qf3 23.Be2 Qh3 24.Rc8 Rc8 25.Bc4?? Qg4–+ (25...Qg4 26.Kh1 Qd1 27.Kg2 Qg4 28.Kf1 Rc4 29.h3 Qh3 30.Ke2 Qg4 31.Kd3 Nc1 32.Qc1 Rc1 33.e4 Qf3 34.Kd2 Qc3 35.Ke2 Re1) 0–1. Fournier,Frederic (1715) – tothpetertamas (1670), Active (5/0), 2005.

4.Bb2 Nf6 5.c4 =.

4.c4 Bb7 5.Bb2 d6 6.Nf3 Nd7 7.e3 e5 8.d3 Ngf6 9.Be2 Be7 10.0–0 0–0 11.Nc3 Nc5 12.Rc1 c6 13.e4 cb5 14.Nb5 Nb3 15.Rb1 Nh5 16.g3 g6 17.Nd2 Ng7 18.Nb3 ab3 19.Qb3 Kh8 20.f4 f5 21.fe5 fe4 22.ed6 Bg5 23.Rf8 Qf8 24.Rf1 Be3 25.Kg2 ed3 26.Bf3 Bf3 27.Rf3 Qe8 28.Qd3 Bh6 29.Nc7 (29.Nc7 Qg8 30.Na8+–) 1–0. bratek55 (1725) – skyhaai (1655), kurnik, 2011.

3.a3 c6

4.c4 cb5 5.cb5 d5 6.Bb2 Nd7 7.e3 (7.Nf3 Nc5=) 7...e5 8.Nf3 e4 (8...Bd6 9.Be2=) 9.Nd4 Ngf6 10.Nc3 Nc5 11.d3 Bg4 12.f3 Bh5 (12...ef3 13.gf3 Bd7 14.Rg1=) 13.Be2 g6 (13...ed3 14.Bd3 Nd3 15.Qd3 Bg6=) 14.g4 (better is 14.0–0+=) 14...ef3+= 15.Nf3 Bg4 16.Nd5 Nd5 17.Bh8 Nb3 (better is 17...Ne3 18.Qb1 Nd3 19.Qd3 Qd3 20.Bd3 Bf3–+) 18.Bd4?? (better is 18.Ra2 Ne3 19.Qb1+=) 18...Bf3–+ 19.Bf3 Nd4 20.ed4 (20.Bd5 Qd5 21.0–0 Nb5 22.Rf4–+) 20...Qh4 21.Kd2 (21.Ke2 Nc3 22.Kd2 Nd1 23.Re1 Kd8 24.Kd1 Qd4–+) 21…Bh6 (21...Bh6 22.Ke2 Nc3 23.Kf1 Nd1 24.Rd1 Be3–+) 0–1. Marchant,Murray Scott – Zalla,Remo Orlando, corr ARG–CAN, 1975.

4.c4 c5 5.Bb2 Qc7 6.d4 b6 7.d5 d6 8.g3 Kd8 9.Bg2 Nd7 10.e3 Bb7 11.Ne2 f6? 12.0–0 Ne5 13.Nd2 Bc8 14.Nf4 Ra7 15.Ne6 Be6 16.de6 Qc8 17.f4 Ng6 18.f5 Ne5 19.Nf3 g6?? 20.e4 g5?? 21.h3 h5? 22.Nh2 g4 23.h4 Nh6 24.Bc3 Bg7 25.Rc1 Nc4 26.Bf6 Bf6 27.Rc4 Be5 28.Kf2 Ng8 29.Ra4 Ra4 30.Qa4 Qb7 31.Qa6 Qa6=+ 32.ba6 Kc7 33.Rb1 Nf6 34.Nf1 Ra8 35.Ne3 Ra6 36.Nc4 Bd4 37.Ke2 Kc6?? 38.Bf1?? Ne4 39.Ne3?? Nc3 40.Kd3 Nb1 41.Nc4 Ra4 42.Ke4 d5 43.Kf4 dc4 44.Kg5 c3 45.Bd3 Nd2 46.Kh5 Nf3 47.Kg6 c4 48.Bc2 Ra3 49.h5 Ra2 50.Be4 Kd6 51.h6 c2 52.Bc2 Rc2 53.f6 ef6 54.h7 Rh2 55.e7 Ke7 56.Kf5 Ng5 57.h8Q Rh8 58.Kg4 c3 59.Kf5 c2 60.g4 c1Q 61.Kg6 Qc2 62.Kg7 f5 63.Kg6 Qc6 64.Kf5 Qc5 65.Kf4 Ne6 66.Ke4 Rh4 67.Kd3 Qc3 68.Ke4 Rg4 69.Kd5 Qc5 0–1. MasterofDisaster – Flip4, Live Game Caissa's Web, 2004.

4.c4 d5 5.e3 Qb6 6.Nc3+= e6 7.Bb2 dc4 8.Bc4 Bd7 9.Rb1 cb5 10.Bb5 Bb5= 11.Nb5 Qb5 12.Bg7! Qg5 13.Bh8 Qg2 14.Qf3 Qf3 15.Nf3 Nc6 16.Rb7 Ba3 17.Ng5 Be7 18.h4 h6 19.Ne4 f5 20.Ng3 Nf6 21.Bg7 a3 22.Ke2 Ne5 23.Ra1 Nfg4 24.Ra2 Nc4? 25.Nh5 Kf7 26.Bc3 Ke8? 27.Ng7 Kf7 28.Nh5?? Ra4?? 29.Nf4 e5?? 30.Nd5+– Nge3 31.fe3 Nd6 32.Re7 Kf8 33.Re5 Ne4 34.Rf5 Ke8 35.Nc7 Kd7 36.Nb5 Ke8 37.Re5 Kf7 38.Nd4 Nf6 39.Rf5 Kg6 40.e4 Ng4 41.Nc6 Re4 (42.Kf3 Kf5 43.Nd4 Rd4 44.Bd4 Nh2 45.Kg3 h5 46.Kh2 Kg4+–). stoker – oss2, Caissa.com, 2004.

4.e4 d5 5.ed5 cd5 =.

4.e4 Nf6 5.e5 Nd5 +=.

4.Nf3 cb5 5.e3+= Qb6 6.Nc3+/– b4 7.ab4 Qb4 8.Ba3 Qg4 9.Nd5 Kd8? 10.Bc5+– Na6 11.Bb6 Ke8 12.Ba6 ba6 13.Nc7 Kd8 14.Na8 Ke8 15.Nc7 Kd8 16.Na6 Ke8 17.Nc7 Kd8 18.c3 (18...Bb7 19.Ra4+–) 1–0. orane – monlar, Caissa.com, 2006.

4.Nf3 d5 5.e3 =.

3.a3 d5

4.Bb2 c5 5.e3 Nf6 6.c4N d4 7.ed4 cd4 8.d3 e5 9.Nf3 Bd6 10.Be2 Nbd7 11.0–0 Nc5 Black prepares e4 12.Nbd2 0–0 13.Qc2 h6 14.Rad1 Bf5 Black prepares e4 15.Rfe1 e4 (15...Rc8!?+=) 16.Ne4 (16.Nd4? ed3 17.Qc3 de2 18.Re2 Bg6–+) 16...Nfe4 (worse is 16...Nce4 17.de4 Be4 18.Qd2+/–) 17.de4 Be4 18.Bd3 Bf3 (worse is 18...Nd3 19.Re4 Nb2 20.Qb2+/–) 19.Bh7? (19.gf3 Qh4 (worse is 19...Nd3 20.Qd3 Qg5 21.Kf1+=) 20.Bd4 Qh2 21.Kf1 Ne6–/+) 19...Kh8 20.Rd4?? (20.gf3 Qh4 21.Bd4 Qh2 22.Kf1–+) 20...Qg5–+ 21.g3 Be5 22.Bf5?? Bd4 23.Bd4 Rfe8 24.Be3 Re5 25.Bh3 Qh5 26.Bf1 Rae8 27.Bg2 b6 28.Qc3 Bg2 29.Kg2 Qg6 30.h4 Qd3 31.Qc1 Qe4 (31...Qe4 32.Kh2 Nd3–+) 0–1. Pierangeli,A (1960) – Caruso,Au (2255), 1st Open Cento ITA, 2011.

4.Bb2 Nd7 5.e3 Nc5 6.Nf3 f6 (6...e6 7.d4 Ne4 8.Bd3=) 7.d4+= Ne4 8.Nbd2 b6 (8...Bg4!?+=) 9.Bd3+/– Bf5 10.c4?? (10.Nh4!? e6 11.Nf5 ef5 12.c4+/–) 10...Nh6 (better is 10...Nf2 11.Kf2 Bd3–/+) 11.Qc2+/– Qd6? (better is 11...Nd2!? 12.Qd2 e6+=) 12.Ne4+– de4 13.Be4 (13.Be4 e6 14.Bf5 Nf5 15.e4+–) 1–0. Fournier,Frederic (1980) – NN, jeu.europe–echecs.com, 2013.

4.e3 Nd7 5.Bb2 Ngf6 6.Nf3 e6 7.Be2 Bd6 8.0–0 0–0 (8...e5 9.d4 e4 10.Nfd2=) 9.c4 c6 (9...Nc5 10.Nc3=) 10.Qc2 e5 11.d3 (11.Nc3 Qc7=) 11...Re8 (11...dc4 12.dc4 Qe7 13.Rd1=) 12.h3 (12.Nc3 Qc7=) 12...Qe7 (12...Nc5 13.cd5 cd5 14.Nbd2=) 13.Nbd2 (13.bc6 bc6 14.Nc3 dc4=) 13...Nf8 (13...cb5 14.cb5 Nb6 15.Bc3+=) 14.Kh1 (14.bc6 bc6 15.d4 Ng6+=) 14...Bd7 (14...Ng6 15.c5 Bc5 16.bc6–/+) 15.c5 Bb8 16.b6 Ng6 17.Nh2 (17.Rfe1 e4 18.Nd4 Nh4=) 17...h6 (17...Ra5 18.d4+=) 18.Rac1 Ra5 19.d4 (19.Nhf3 Rb5=) 19...e4+= 20.Bc3 Ra8 21.f4? (better is 21.Rfe1+=) 21...ef3!–+ 22.Rf3 (22.Ndf3 Qe3 Discovered attack; 22.Bf3 Qe3 Discovered attack; 22.Rf3 Nh4 Decoy; 22.gf3 Qe3 Discovered attack (22...Bh3 Deflection); 22.Nhf3 Qe3 Discovered attack) 22...Nh4 23.Rcf1 (23.Nhf1 Nf3 24.Bf3 Nh7–+) 23...Nf3 (23...Nh5 24.Bd3 Qg5 25.R1f2 Nf3 26.Nhf3 Ng3 27.Kg1 Qe3 28.Nf1 Nf1 29.Kf1–+) 24.Rf3 Nh5 25.Ndf1 (25.Nhf1 Nf4! 26.Bd1 Ng6–+) 25...f5 (25...Nf4 26.Ng3 Ne2 27.Ne2–+) 26.Rf2 (26.Bd3 Rf8–+) 26...Qg5 (26...Nf6 27.Bd3–+) 27.Nf3 (27.Bd3 Rf8–+) 27...Ng3 28.Kg1 Ne2 (28...Qe7 29.Bd3 Ne4 30.Re2–+) 29.Re2 Qe7 30.Bb2 (30.Re1 Be6–+) 30...Ra5 31.Qd2 (31.Bc3 Ra6–+) 31...Rb5 32.Qc2 Ra5 (32...Qe4!? 33.Ne5 Be5 34.de5–+) 33.Bc3?? (33.Qd2 Ra6–+) 33...Ra8 34.Bd2?? (34.Bb2 f4 35.Re1–+) 34...Qe4 35.Qe4 (35.Bc3 Qc2 36.Rc2 Re4–+) 35...Re4 (35...fe4 36.N3h2–+) 36.Be1 (36.Kf2 Kf7–+) 36...g5 37.N3d2 Re8 38.Kf2 Kf7 39.Nf3 Kg6 (39...g4!? 40.Ng1–+) 40.Bc3 h5 41.Ne5 Be5 42.de5 h4 (42...Rf8 43.Nd2–+) 43.Nh2 g4 44.hg4 (44.Nf1–+) 44...fg4 45.g3 (45.Kg1 Bf5–+) 45...Rf8 46.Kg2 (46.Kg1 hg3 47.Nf1 Rf3–+) 46...h3 47.Kg1 Bf5 48.Rf2 Kh5 (48...Be6 49.Rd2–+) 49.Rf4 Be6 50.Kf2 (50.Rd4 Rf7–+) 50...Rf4 51.ef4 Kg6 52.Ke3 (52.Nf1–+) 52...d4! 53.Kd4 (53.Bd4 Ra5 Combination; 53.Kd4 Rd8 Combination) 53...Rd8 54.Ke3 Rd1 55.Kf2 Rc1 56.Be1 Kf5 57.Bd2 (57.Ke2 Ra1 58.Kf2 Ra2 59.Ke3 Rh2 60.Bd2 Rg2 61.Bc1 h2 62.Bb2 h1Q 63.Bc3 Qd1 64.Bd2 Qd2#) 57...Rc2 (better is 57...Ra1!? 58.Nf1–+) 58.Ke3 (58.Nf1 Ra2–+) 58...Rc5 59.Nf1 (59.Kd3 Rb5 60.Bb4 c5–+) 59...Rc2 60.Kf2 (60.Nh2 Ra2 61.Nf1 Ra3 62.Kf2 Rf3 63.Ke1 Bc4–+) 60...Ra2 61.Ne3 Ke4 0–1. Pfueller,Volker – Hagermann,Hermann (1735), 2rd Berlin Germany, Senior Championship, 2010.

4.Nf3 Nf6 5.e3 =.

4.Nf3 Bg4 5.e3 Nd7 6.Bb2 Ngf6 7.Be2 g6 (7...e6 8.Bc3=) 8.0–0 Bg7 9.d4 (9.d3 Bh5=) 9...Ne4 10.Nbd2 Nd6 (10...Ndf6 11.c4=) 11.Rc1 (11.c4 0–0=) 11...Nb6 12.Ne5 Be2 13.Qe2 Be5 14.de5 Ndc4 15.Nc4 Nc4 Here comes the goal–getter 16.Bd4 (16.Rb1 0–0=) 16...0–0 17.Ra1 Qd7 18.f4 (18.b6 cb6 19.Rfc1 Rfe8–/+) 18...Qb5 19.Rf3? (19.Rab1 Qc6 20.Qd3 b6–/+) 19...Qa5 (19...Na3!? 20.Qf2 c5 21.Bc3–+) 20.Rd1 (20.Qd3 e6–/+) 20...Na3 21.e4 Nb5–+ 22.ed5 Nd4 23.Rd4 Rfd8 24.Qc4? a3 25.Qa2?? the position was bad, and this mistake simply hastens the end 25...Qe1 26.Rf1 Qe3 (26...Qe3 27.Rf2 Qd4–+) 0–1. Schmidbauer,Josef – Grallert,Juergen, Niederbayernliga, 2002.

3.a3 Nf6

4.Bb2 =.

4.Nf3 =.

3.Bb2 c6

4.e3 cb5 5.Bb5 Nc6 6.d4 e6 7.Ne2 Ra5 8.Bd3 b6 9.a3 Ra8 10.Nd2 Ba6 11.c4 Nf6 12.Qc2 Bb7 13.e4 Be7 14.d5 ed5 15.ed5 Nb8 16.0–0 0–0 17.Rab1 g6 18.Qc3 Kg7 19.Ne4 d6 20.g4 h6 21.h4 Kg8 22.Nf6 Bf6 23.Qf6 Qf6 24.Bf6 Nd7 25.g5 hg5 26.hg5 Nf6 27.gf6 Rfe8 28.Nd4 Bc8 29.Rb6 Bf5 30.Bf5 gf5 31.Nf5 Kh7 32.Ne7 Kh6 33.f4 Kh5 34.Kf2 Kg4 35.Ke3 Rh8 36.Rg1 Kh3 37.Nf5 Kh2 38.Rbb1 Rh3 39.Kf2 Rf3 40.Kf3 Kh3 1–0. karoo54 – lingpasarica, kurnik, 2012.

4.e4 cb5 5.Bb5+= Qc7 6.Nf3+/– Nh6 7.Nc3 Ra5 8.Ba4+– Rh5 9.0–0 Qd6 10.Qe2 Na6 11.Qc4 Nc7?? 12.Nb5 (12...Rb5 13.Bb5+–; better is 12.e5 Qb6 13.Nd5 Qa5+–) 1–0. Wall,Bill – Kris, Internet, 2005.

4.e4 d6 5.Nf3 =.

3.Bb2 d6

4.e3 e5 5.c4 Nf6 6.Nf3 (6.d4 Nbd7=) 6...Nbd7 (6...e4 7.Nd4=) 7.a3 Nc5 8.d4 ed4 9.Nd4 (worse is 9.Qd4 Nb3 10.Qf4 Na1 11.Ba1 Be7–/+) 9...Be7 10.Be2 0–0 11.0–0 (11.Nc3 Be6=) 11...Be6 (11...Nfe4 12.f3 Nf6 13.Nc3=) 12.Nd2 Qd7 13.N2f3 (13.Ne6 fe6 14.Bd4 c6+=) 13…h6 (13...h6 14.Ne6 fe6=; 13...Nfe4 14.Rb1=). Morris – Thomason, Colorado, 1986.

4.e3 e5 5.d4 Nd7 6.Nf3 e4 7.Nfd2 Ngf6 8.c4 b6 9.Nc3 Bb7 10.Qc2 Qe7 11.Na4+/– g6 12.Nc3 Bg7 13.g3 0–0 14.Bg2 Rfe8 15.0–0 d5 16.cd5+– Bd5 17.Nd5 Nd5 18.Qe4 Qe4 19.Be4 N7f6 20.Bb1 Ra5 21.a4 Nb4 22.Bc3 Nfd5 23.Bb4 Raa8 24.Ba3 Ra4 25.Bd3 Rea8 26.Bb2 Nb4 27.Be4 Ra1 28.Ra1 Ra1 29.Ba1 f5 30.Bb1 Kf7 31.Bc3 Nd5 32.Ba2 Ke6 33.f3 Kd6 34.Bd5 Kd5 35.e4 fe4 36.fe4 Kd6 37.Kf2 c6 38.bc6 Kc6 39.d5 (39...Kd7 40.Bg7+–) 1–0. marandreo (1630) – jocls, internet, 2006.

3.Bb2 Nf6

4.Nf3 =.

4.e3 e6

5.a3 c6 6.c4 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4 a4).

5.a3 c6 6.Nf3 d5 =.

5.a3 c6 6.Nf3 d6 7.Be2 c5 8.0–0 (8.c4 Be7 9.Nc3 Qa5 10.0–0 0–0 11.d4 cd4 12.ed4 d5 13.c5+/– 0.75; 8.Nc3 d5 9.d4 c4 10.e4 Be7 11.e5 Nfd7 12.Bc1 0–0 13.0–0= 0.25) 8...Nbd7 (8...Be7 9.c4 Nbd7 10.Nc3 Nb6 11.d4 cd4 12.ed4 Qc7 13.Qd3+= 0.31) 9.c4 e5 (9...Be7 10.Nc3+= Nb6 11.d4 cd4 12.ed4 Qc7 13.Qd3+= 0.31) 10.d4 cd4 (10...Qc7 11.Nc3+= Nb6 12.Rc1 Bg4 13.Nd5+= 0.69) 11.ed4+/– e4 12.Nfd2 d5 13.cd5 (13.Nc3+/– 0.84) 13...Nb6 14.Nc3 (14.Re1 Be7+/–) 14...Nbd5 (14...Bf5 15.Re1 Be7 16.Qb1+/–) 15.Nd5 (15.Nde4 Ne4 16.Ne4 Be7+–) 15...Nd5 (15...Qd5 16.Re1 Be6 17.Bc4+/–) 16.Ne4 f5 (16...Be7 17.Nc5+/–) 17.Nc3 (17.Nc5 b6 18.Re1 Be7+–) 17...Nf4 (17...Nc3!? 18.Bc3 Bd6+/–) 18.Bf3 Be7 (18...Qa5 19.Rc1+–) 19.g3 (19.Re1!? Ra5+–) 19...Nh3 20.Kg2 f4 21.Ne2 (better is 21.Bd5!?+–) 21...0–0+= 22.Qd3 Bf5? 23.Be4?? f3!–+ 24.Kf3 Be4 25.Ke4 Rf2 26.Qc4= Kh8 27.Rf2 Nf2 28.Ke3 Ng4 29.Kd2 Ne5 30.Qc3?? Rc8–+ 31.Qe3?? Nc4 (31...Nc4 32.Kd3 Ne3 33.Ke3 Bg5 34.Nf4 Qd5–+) 0–1. Neumann,Frank (1635) – Rheindt,Stefan (1775), RSS7E easy–95, 2009.

5.a3 d5 6.Nf3 =.

5.Nf3 a3 6.Bd4 d6 =.

3.c4 c6

4.Bb2 d5 5.e3 (5.cd5 cd5 6.Nf3 Nf6=) 5...e6 (5...cb5 6.cb5 Nf6 7.Nf3=) 6.Nf3 (6.Nc3 a3 7.Bc1 dc4 8.Bc4 Bb4=) 6...a3 (better is 6...cb5 7.cb5 Nf6=) 7.Na3 (better is 7.Be5+=) 7...Ba3+– 8.Bg7 Nd7 (8...cb5 9.Bh8 bc4 10.Be5+–) 9.Bh8 Ndf6 10.Bf6 (10.bc6 bc6 11.cd5 ed5+–) 10...Nf6 11.Qc2 (11.bc6 bc6 12.cd5 cd5 13.Bb5 Bd7 14.Bd7 Qd7+–) 11...Qa5 (11...cb5 12.cb5 Ne4 13.Bd3+–) 12.Bd3 Ke7 (12...dc4 13.Qc4 Bd7 14.Qd4+–) 13.bc6 bc6 14.Ne5 (14.cd5 cd5 15.Ne5 Ke8+–) 14...Bb7 (14...Qc7 15.f4+–) 15.Rb1 (15.Bh7 c5+–) 15...Rb8 (15...Bb4+–) 16.Nc6! (16...Bc6 17.Rb8 dc4 18.Bc4+– (< 18.Bh7 Qc7 19.Rh8 Bg2+–)) 1–0. Wall,Bill – Greer,Ken, Palo Alto CA, 1989.

4.Nc3 cb5 5.Nb5 a3 (5...Nf6 6.d4=) 6.Qb3 (6.Ba3 Nf6+/–) 6...e6 7.e4 (7.Nf3 Qf6 8.d4 Na6+/–) 7...Nf6+= 8.e5 Ng8 (8...Ng4 9.Qg3 Nh6 10.Ba3+/–) 9.d4 (9.Nf3 Qa5+/–) 9...d5 (9...Nc6 10.c5+/–) 10.Nf3 (10.c5 Nc6+/–) 10...f6 (10...dc4 11.Bc4 Nc6 12.0–0+/–) 11.Bd3 fe5 12.Ne5 Nd7 13.Ng6 hg6= 14.Bg6 Ke7 15.cd5 (15...Qa5 16.Bd2=+; 15.Na3 Kf6 16.cd5 ed5–+; 15.Ba3?! Kf6 16.Bf8 Qf8=). Vitkevicius,Juozas – Cassola,Aldo Guillermo, CiF TT–94–0025B, 1994.

4.Nc3 cb5 5.cb5 d6 6.Na4 Bd7 7.Nc3 Qa5 8.e3 e5 9.a4 Nf6 10.Bc4 Be7 11.d3?? (11.e4+=) 11...Qc3?? (better is 11...d5 12.Bd2 dc4–+) 12.Bd2+– Qb2 13.Rb1?? Qa3–+ 14.Ra1 Qc5 15.Ne2 d5 16.Bb3 Be6 17.d4 ed4 18.Nd4 Qc8 19.0–0 Bd6 20.Qf3?? Qd7 21.Rfc1?? 0–0 22.h3 Ne4 23.Be1 Be5 24.Ne6?? fe6 25.Qe2 Ba1 26.Ra1 Qf7 27.f3 Qf6 28.Rc1 Ng3 29.Bg3+= Nd7 30.Rc7 Rfd8 31.Rb7?? Nc5–+ 32.Bd5 Rd5 33.Rc7 Rad8 34.b6? Na6?? 35.Qa6+/– Rd2? 36.b7+– Qb2 37.Qf1 Rd1 38.Qd1! Rd1 39.Kh2 Rd8 40.Rc8 Qb7 41.Rd8 Kf7 42.e4 Qb4 43.Rd7 Kg6? 44.Be5 Qa4 45.Rg7 Kh6 46.Rg4 Qd1 47.Bf4 Kh5 48.Rg5 Kh6 49.Rd5 Kg6+– 50.Rd1 1–0. tyop (1855) – eppi, kurnik, 2012.

3.c4 d5

4.cd5 Qd5 5.Nc3 Qc4 =.

4.cd5 Nf6 5.Nc3 Nd5 6.Na4 e5 7.Nc3 =.

4.cd5 Nf6 5.Nc3 Nd5 6.Na4 Bf5 7.Bb2 c6 8.bc6 Nc6 9.Nf3 Ndb4 10.d3 Qa5 (10...e5 A) 11.Ne5? Qa5 12.Nc3 Qe5–+ (12...Ne5?! 13.a3 Nbc6 14.e4–+); B) 11.a3 Nd5 12.Nc3+=) 11.Nc3 e5 12.e4 (12.a3 Nd5 13.Qb3 Nb6+=) 12...Nd4 (12...Be6 13.Qd2 Bg4 14.Be2=) 13.Nd4+= ed4 14.a3 dc3 (14...Nd5! 15.Qa4 Qa4 16.Na4 Ra4 17.ef5 Kd7+=) 15.Bc3+/– Qc7 16.Qd2 Be4 (16...Nd5 17.ed5 f6 18.Be2+=) 17.de4 (17.ab4?! Ra1 18.Ba1 Bd5+=; 17.Bb4?! Bb4 18.Qb4 Bd5+=) 17...Nc6 18.a4 Rd8 19.Qb2 Qf4 20.Be2 Bc5 Threatening mate... how? 21.0–0 0–0 22.Qb7 (22.Bg7?! Rd2 23.Qb7 Nd8=) 22...Rd6 23.Qb5 (23.Qb1 Rb8 24.g3 Bf2 25.Kg2 Rb1 26.gf4 Ra1 27.Ra1 Bd4 28.Bd4 Nd4+–) 23...Nd4 24.Bd4 Bd4 25.Ra3 Rh6 Do you see the mate threat? 26.g3 Bf2+= 27.Kg2 Qe4 28.Bf3 Qe7 29.Rd3 Bc5 30.Rd5 Ba7 31.Re5 Qc7 32.Bd5+/– Rf6 33.Rf6 gf6 34.Re4 Rb8 35.Qe2 Qd7 36.Qg4 Qg4 37.Rg4 Kf8 38.Rh4 Rb2 39.Kf1 Kg7 40.Bf7 Be3 41.Be8 Bg5 42.Rh5 Ra2 43.h4 Be3 44.Rf5 Bb6 (44...Kf8 45.Bb5+/–) ½–½. Lepperoed – Johansen,V, corr Norway, 1983.

4.cd5 Nf6 5.Nc3 Nd5 6.Na4 Bf5 7.d3 e6 8.e4 (8.Bd2!? Qh4 9.Nc3=) 8...Bb4+= 9.Bd2 Bd2 (9...Bd2 10.Kd2 Be4 11.de4 Nf6 12.Kc2 Ra4 (worse is 12...Ne4 13.Qd8 Kd8 14.f3+=) 13.Qd8 Kd8+=).

4.e3 dc4 5.Bc4 Nd7 6.d4 Nb6 7.Bd3 Nf6 8.Nc3 Bg4 9.f3 Bh5 10.Nge2 e6 11.a3 Be7 12.e4 0–0 13.0–0 Bg6 14.Be3 Nfd7 (14...Bd6 15.Qc1=) 15.Nf4 Bg5 16.Qd2 Nf6 17.e5?? (17.Ng6!? Be3 18.Qe3 fg6 19.Ne2+=) 17...Bd3 (17...Bf4 18.Bg6 A) 18...fg6?! A1) 19.ef6?? Nc4 (19...Qf6?! 20.Ne4 Be3 21.Qe3=) 20.Qd3 Be3 (20...Ne3?! 21.Rfe1–+) 21.Kh1 Qd4–+; A2) 19.Bf4 Nc4 20.Qd3=; B) 18...Nc4–+) 18.Qd3= (18.Nd3?? Nc4 19.Qe1 Be3 (< 19...Ne3 20.ef6 Qd4 21.fg7–+) 20.Kh1 Bd2–+) 18...Bf4 19.Bf4 Nfd5 20.Nd5 Nd5 21.Bd2 Qd7 22.f4 f5 23.Rac1 Rfd8 24.Rfd1 Rac8 25.h3 Nb6 26.Bb4 Qd5 (26...Ra8 27.Bc5=) 27.Rc5 (27.Be7 Rd7 28.Rc5 Qb3=) 27...Qe4 (27...Qd7!?=) 28.Qe4+= fe4 29.g3 (29.Kf2 Kf7+=) 29...e3 30.Kf1 g6 (30...Nd5 31.Rb1+=) 31.Ke2 Nd5 32.Rc4 Rd7 33.Bc5 Rcd8 34.Kd3 b6 35.Bb4 Kf7 36.Rb1 ½–½. Salaske – Husslein, corr SOK–89–45, 1989.

4.e3 c5 5.cd5 Qd5 6.Nc3 Qf5 7.Na4 Nd7 8.Bb2 b6 9.d4 e6 10.Bd3 Qd5 11.Nc3 Qg2 12.a3 Bb7 13.Nce2 Qh1 0–1. mtre – KINGoftheBOARD, internet, 2002.

4.e3 d4 5.d3 de3 6.Be3 Bf5 7.Nf3 Bg4? (better is 7...Nf6!?+=) 8.Nc3 e6 9.Be2 Bb4 10.Qc2 Nf6 11.h3 Bc3 12.Qc3 Bf5 13.0–0 Nbd7 14.Nh4 Bg6 15.Bf3 Qc8 16.Rae1 0–0 17.Ng6 hg6 18.d4 Rd8 19.Bf4 Nb6 20.Re5 c6? (better is 20...a3+/–) 21.bc6+– bc6 22.Rc5 Nbd5 (22...Qd7 23.Rc6 Rac8 24.Rb6 Qd4 25.Qd4 Rd4 26.Be5 Rdc4 27.Rd1+–) 23.cd5 Nd5 24.Bd5 ed5 25.Rc6 Qf5 26.Qd2 Re8 27.Rfc1 Re4 (27...f6 28.f3+–) 28.Be5 f6 29.f3 Rh4 30.Bd6 Qg5 (30...Re8 31.Rc7+–) 31.Qg5 fg5 32.Be5 Re8 33.Rg6 Re5 (33...Re7+–) 34.de5 Rb4 (34...Kf7 35.Ra6 Rc4 36.Rc4 dc4 37.Ra4 c3+–) 35.Rc7 Rb2 36.Rgg7 Kf8 (36...Kh8 37.e6 Rb1 38.Kh2 Rb2 39.Rgf7 Rb8 40.Rh7 Kg8 41.Rcg7 Kf8 42.Rf7 Kg8 43.e7 d4 44.Rfg7#) 37.e6 Ra2 (37...Rb1 38.Kh2 Rh1 39.Kh1 d4 40.Rgd7 d3 41.Rc8#) 38.Rcf7 Ke8 39.Rg8# 1–0. Janek – morey, internet, 2016.

4.e3 e5 5.cd5 Qd5 6.Nc3 =.

4.e3 Nf6

5.d4 c6 6.Nc3 dc4 7.Bc4 e5 8.de5 Qd1 9.Nd1 Bb4 10.Ke2 Ng4 11.f4 Bd7 12.bc6 Bc6 13.Nf3 0–0 14.a3 Ba5 15.Bb2 Nh6 16.Nf2 Nd7 17.Nd4 Nb6 18.Nc6+/– Nc4 19.Na5 Na5 20.g4 Rac8 21.Kf3 Rc2 22.Rab1 Nb3 23.Ne4 Rfc8 24.h3 Kf8 25.f5 Ng8 26.Rhd1 h6 27.Rd7+– R2c7 28.Rbd1 Rd7 29.Rd7 Rb8 30.Nd6 Ne7 31.f6 gf6 32.ef6 Nc6 33.Rf7 Kg8 34.Rg7 Kf8 35.Rh7 Kg8 36.Rh6 b5 37.f7 Kf8 38.Bf6 Ncd4 39.Bd4 (39...Nd4 40.ed4+–; 39.Kf2 b4 40.Rh8#) 1–0. Lohr – Husslein, corr SOK–88–18, 1988.

5.d4 Bf5 6.Nc3 a3 7.Qb3 dc4 8.Bc4 e6 9.Nge2 Nbd7 10.Ng3 (10.f3 Nb6=) 10...Bg6= 11.0–0 Nb6 12.Be2 Be7 13.Bf3 Ra7 14.e4 (14.Nge4!?+=) 14...Qd4+= 15.Bf4 Qd8 16.Rfd1 (16.Rfd1 Nfd7 17.Rac1=). Deneuville,C – Zielinski,P, corr SOK–95–109, 1997.

5.d4 Bf5 6.Nc3 a3 7.Qb3 e6 8.c5 Ne4 (8...Nbd7 9.Ba3 b6 10.Na4+=) 9.Nf3 (9.Ba3 Nd7 10.Ne4 Be4 11.Bb4+=) 9...Nc5 (better is 9...b6 10.c6 Bd6=) 10.dc5+/– Bc5 11.Be2 (11.Nd4 Qf6+/–) 11...Nd7 12.Bd2 (12.Nd4 Bg6+/–) 12...Nb6 (12...Bd6 13.Rc1+/–) 13.Rc1 Bd6 14.0–0 (14.e4 de4 15.Ng5 Be5+/–) 14...0–0 15.Nb1 (15.Nd4 Bg6+/–) 15...Qe7 16.Bc3 f6 (16...e5 17.Nbd2+/–) 17.Nbd2 (17.Bd4 Nd7+/–) 17...Bg6 (17...e5 18.Rfd1+/–) 18.Nh4 Bf7 19.Bd3 (19.Bd4 Rac8+/–) 19...g5 20.Nhf3 e5 (20...e5 21.Qc2 e4 22.Ne4 de4 23.Be4 Bc4 24.Bb7 Rad8+=). Lohr – Husslein, corr (year?).

3.c4 e5

4.Bb2 d6 5.Nc3 (5.d4 ed4 6.Bd4 Nh6=) 5...a3 6.Bc1 Nd7 7.g3 (7.Nf3 Ngf6=) 7...b6 (7...Ngf6!?=+) 8.Bg2+= Ra7 9.e3 Ne7 10.Nge2 Nc5 (10...Nf6 11.d4=) 11.d4 ed4 (11...Bb7 12.0–0 (< 12.dc5 Bg2 13.cb6 cb6=) 12...Bg2 13.Kg2+=) 12.ed4+/– (< 12.Qd4 Nf5 13.Qd2 Be6=) 12...Nb7 13.0–0 g6 (13...Na5 14.Qd3+/–) 14.Qb3 (14.Bg5 Bg4+–) 14...h5 (14...Bg7 15.Re1+/–) 15.Ne4 (15.Bg5 Bh6 16.Bf6 Na5 17.Qa3 Rh7+–) 15...Bg7 16.Bg5 f6? (better is 16...0–0!?+/–) 17.Nf6+– Bf6 18.Bf6 Rf8 (18...0–0 19.Bg5+–) 19.Bg5 Qd7 20.Rae1 Qf5 21.h4 (21.Qe3 Qe6 22.Nf4 Qe3 23.Re3+–) 21...Kf7 (21...Na5 22.Qa3 Be6+–) 22.Nf4 Re8 23.c5 d5 24.Bh3 Na5 25.Qf3 Qc2 26.Bc8 Nc8 27.Qd5 (27…Kg7 28.Re8 Qf2 29.Rf2 Ne7 30.Re7 Kh8 31.Ng6#) 1–0. Muller – Peter, SFM, 1991.

4.Bb2 f6 5.Nc3 a3 6.Bc1 b6 (6...Ne7 7.d4=) 7.Nf3 Bb7 (7...Bc5 8.e4=) 8.e3 (8.e4 Bc5=) 8...Nh6 9.Be2 e4 10.Nd4 Bd6 11.0–0 0–0 (11...f5 12.d3=) 12.f3 f5 13.Qb3 Kh8 (13...Rf7 14.Na4=) 14.f4 Qe7 15.Rb1 (15.Nb1 Bc5+=) 15...Bc5 (15...g5 16.fg5 Qg5 17.Nd5=) 16.Nc2+= Rf6 (16...Nf7 17.Na4+=) 17.Nd5 (17.Na4 Bd6+=) 17...Bd5= 18.cd5 Rg6 19.Bh5 Rf6 20.d3 Ng8 21.Be2 Rh6 22.de4 (22.d6 Qh4 (22...Qd6? 23.d4+–) 23.h3 A) 23...Rd6? 24.d4+– (24.Ba3?! Ra3 25.Na3 Be3 26.Kh1 Bf4=); B) 23...Bd6=) 22...fe4 23.Bd2 c6 24.Nd4 Bd4 25.ed4 Nf6? 26.dc6 dc6 27.f5 e3 28.Be3 Rh4 29.Bf3 Ra5? 30.bc6 Rf5 31.Bf2 Rh6 32.Qb6 Nfd7 33.Qc7 Re6 34.Bg4 Rf8 35.Be6 Qe6 36.cd7 Nd7 37.Rb7 1–0. wiking – Giant, internet, 2010.

4.Nc3 a3 5.Nf3+= Bc5 (5...f6 6.e4+=) 6.Ne5+/– Nf6 (6...d6 7.Nf3+/–) 7.d4 Bb4 8.Bd2 (8.Qb3 Bc3 9.Qc3 d6+/–) 8...d6 9.Nd5?? (better is 9.Nd3 Bc3 10.Bc3+/–) 9...Bd2–+ (< 9...de5 10.Bb4 Nd5 11.cd5 Qd5 12.e3=) 10.Qd2 Nd5 (10...de5 11.de5 Nfd7 12.Qf4–+) 11.Nf7–/+ Kf7 12.cd5 Re8 13.Qf4 Kg8–+ 14.0–0–0 Nd7 15.e3 Nf6 16.Bc4 Rf8 17.Qh4 c5 18.dc5–/+ dc5 19.d6 Kh8 20.e4 Qa5 21.e5?? Qc3 22.Kb1 Qb2# 0–1. Breitenstein,Otto – Peter, CiF, 1984.

4.Nc3 Nf6 5.Na4 Bb4 6.Qb3 =.

3.c4 e6

4.a3 c6 5.Nc3 Qa5 (5...d5 6.cd5 ed5 7.e3=) 6.e3 d6 (6...Nf6 7.Nf3=) 7.Qc2 (7.Rb1 Nd7+=) 7...Bd7 (7...Nf6 8.Rb1=) 8.Be2 Nf6 9.Nf3 d5 10.Rb1 dc4 11.Bc4 Be7 12.0–0 0–0 13.Ne5 Be8 (13...cb5 14.Nd7 Nbd7 15.Rb5+=) 14.f4 cb5 15.Bb5 (15.Nb5 Nc6+=) 15...Qc7 (15...Bb5 16.Rb5 Qc7 17.Bb2=) 16.d3 (16.Qb2 Bb5 17.Nb5 Qd8+=) 16...Bb5= 17.Rb5 Rc8 (17...Nd5 18.Nc4=) 18.Nc4+= Nbd7 19.Na4 Nd5 20.Qb3 b7 Ra4 21.Qa4 Nc3 22.Qb3 Nb5 23.Qb5 Nc5 (23...Qc6 24.Qb1+=) 24.Nd2 Qc6= 25.Qc4 b5 26.Qc2 Qd7 27.d4 Na4 28.Qb1 Qd5 29.Bb2 f5 30.Rc1 Rc1 31.Bc1 Qc6= 32.Bb2 Nc3 33.Qd3 Na4 34.Qb3 Nb2 35.Qb2 Kf7 36.Nb1 Qc4 37.Nc3 b4 38.ab4 Bb4 39.Ne2 Be1 40.Kf1 Bb4 41.Kf2 Kg6 42.Ng1 Qb5 43.Qc2 Qd5 44.Nf3 Bd6 45.Nd2 Bb4 46.Nc4 Kf6 47.Ne5 Be7 48.Qa4+– Qd8 49.g4 fg4 50.Qd1 h5 51.h3!+– Qe8 52.hg4 g6 53.gh5 gh5+/– 54.Qg1 Kf5 55.Qg3 Bd8 56.Kf3 Bh4 57.e4 Kf6 58.Qh4 Kg7 59.Qg5 Kh7 60.f5 ef5 61.Qf5 Kg8 62.Qg6 Qg6 63.Ng6 (63...Kf7 64.Nf4+–) 1–0. Pommerel,Wim – Peter, corr CiF, 1989.

4.a3 d5 5.e3 dc4 (5...Nf6 6.d4=) 6.Bc4 Nd7 7.Nf3 (7.d4 Ngf6=) 7...Nb6 8.Be2 Be7 9.Nc3 Nf6 10.Bb2 0–0 11.d4 Nfd5 (11...Qd6 12.0–0=) 12.0–0+= Bd7 13.e4 Nf4 14.Rc1 Ra5 15.Ne5 Ne2 (15...Be8 16.Re1=) 16.Qe2+= Qe8 17.Nd7 Qd7 18.Rfd1 Rd8 19.Rc2 (19.d5 Bd6+= (< 19...ed5 20.Nd5 Nd5 21.Rd5+/–)) 19...Bf6 20.Bc1 (20.Qf3 Bd4 21.Kh1 e5–/+) 20...Qe8 (20...Bd4 21.Bg5 f6 22.Be3=+) 21.Be3 Be7 22.Bf4 Rd7 (22...Ba3? 23.Bc7 Rd6 24.e5+– (24.Bd6?! Bd6 25.Qf3 Qd7+–)) 23.Nb1 Na8 24.Bd2 Ra7 25.Be3 b6 (25...Ra5 26.Rb2+=) 26.Rdc1 h6 27.Qg4 Kh7 28.Rc6 Ra5 29.Qe2 Qf8 30.Bd2 Ra7 31.Qe3 Bf6 32.R1c4 Qd8 33.Bc3 e5 34.d5+– Rd6 35.Bb2 Ra5 36.Nc3 Bg5 37.Qe2 Rc6 38.Rc6 Be7 39.Qc4 Bd6 40.Qd3 Qe7 41.Nd1 Bc5 42.Bc1 f6 43.Ne3 Be3 44.Be3 Kg6 45.Bd2 Ra7 46.Bb4 Qf7 47.Re6 Kh7 48.Re7 Qg8 49.d6 Qb3 50.Qe2 c5 51.bc6 Re7 52.d7 Rf7 53.d8Q Nc7 54.Qdd3 (54...Ne6 55.Qb3 ab3 56.Qb5+–; 54.Qb8 b5+–) 1–0. Pommerel,Wim – Husslein,G, corr SOK–89–45, 1989.

4.a3 Be7 5.Bb2 Bf6 6.d4 d5 7.c5 Ne7 8.e3 0–0 9.Nf3 Nd7 10.Nc3 h6 (10...c6 11.b6+=) 11.Bd3 g6 (11...e5 12.de5 Be5 13.Qc2+/–) 12.0–0 Bg7 13.Bc2 Nf6 14.Ba4 Bd7 15.Bc2 Kh7 16.Ne5 Bc8 17.e4 de4 18.Ne4 Nfd5 19.f4?? (better is 19.Re1+/–) 19...Ne3+= 20.Qe2 Nf1 21.Rf1 Nd5 22.Ng3 Qe8 23.Nh5 Qe7 24.Ng7 Kg7 25.Qf2 Bd7 26.c6 bc6 27.bc6 Bc8 28.g4 (28.Qg3!? Qf6 29.Be4=) 28...Ba6+= 29.Rc1 Bc8 30.Re1 Rb8 31.Be4 (31.Bc1=) 31...Rb2 (better is 31...Nf4 32.Re3 f5 33.Qf4 Rb2 34.gf5 ef5 35.Ng6 A) worse is 35...fe4 36.Nf8 (36.Ne7? Rf4 37.Nc8 Kf6–+) 36...Qf7 37.Qf7 Kf7 38.Nd7+/–; B) 35...Kg6 36.Bf5 Rf5 37.Qf5 Bf5 38.Re7 Rc2–/+) 32.Qb2+= Nf4 33.Qc3 Qh4 34.Re3 (34.Qg3 Qg3 35.hg3 Nh3 36.Kg2 Ng5=) 34...f5 (better is 34...f6 35.Nd3 Qg4 36.Kh1 Nd5 37.Bd5 ed5+=) 35.d5?? (35.gf5 ef5 36.Bf3 Ba6=) 35...Kh7?? (better is 35...fe4!? 36.Nf3 Qf6 37.Qf6 Rf6 38.Re4 ed5 39.Re7 Rf7 40.Re8 Bg4 41.Ne5 Nh3 42.Kg2 Rf2 43.Kg3–+) 36.gf5?? (36.Bf5 Kg8 A) 37.Bg6 Nh3 (37...Ng6?! 38.Qe1 Qf6 39.Ng6 Qg6 40.de6–/+) 38.Kh1 Rf1 39.Kg2 Rf2 40.Kh1 Ng5 41.Bh7 Nh7 42.Nf3 Qg4 43.Qh8 Kh8 44.de6 Qg2; B) 37.Qb4 Nh3 38.Rh3 Qh3 39.Ng6 (39.Be6?? Be6 40.Qf8 Kf8 41.de6 Qe3 42.Kg2 Qe5–+) 39...Qe3 40.Kg2 Qe2 41.Kg3 Qe3 42.Kh4 Qf2 43.Kh3 Qf3 44.Kh4 Qf2 45.Kh3 Qf3 46.Kh4 Qf2=) 36...gf5–+ (36...ef5?! 37.Bf3=) 37.Bd3? (37.Qb4 Rg8 38.Kh1–+) 37...Rg8 (37...ed5?! 38.Rg3 d4 39.Qd2–/+) 38.Rg3 (38.Kh1 Qf2 39.Rg3 Rg3 40.Bf5 ef5 41.Qg3 Qf1 42.Qg1–+) 38...Rg3 39.hg3 Qg3 40.Kf1 Nd3 (better is 40...Ba6! 41.Qc2 Nd3–+) 41.Nd3 Ba6 42.Ke2 f4 (better is 42...Qg2 43.Ke3 Qe4 44.Kd2 Qd5 45.a4–+) 43.Kd2? (43.Qd4 ed5 44.Kd2 Qh2 45.Kc1–+) 43...Qe3 44.Kc2 Qe2 45.Qd2 Bd3 (45...Bd3 46.Kc3 Qd2 47.Kd2 Bf5–+) 0–1. jarvs (1740) – mikebaldini (1710), gameknot.com, 2014.

4.a3 g6 5.Bb2 Nf6 6.Nc3 c6 (6...Bg7 7.Na4 d6 8.c5+=) 7.Na4 Qa5?? (better is 7...cb5 8.cb5 d5+=) 8.Bf6+– cb5 (8...Rg8 9.Nc3 d5+–) 9.Bh8 Qa4 10.Qa4 bc4 (10...ba4 11.e4 d5 12.ed5 ed5+–) 11.Qa8 d5 12.Qb8 Ba3 13.Qc8 Ke7 14.Qc7 Kf8 (14...Ke8 15.Ra3 c3 16.Ra8#) 15.Qd8# 1–0. MT – guest1819, ICC, 2004.

4.Bb2 a3 5.Bc3 Nf6 6.Qb3 Ne4 7.Bb4?? (better is 7.Nf3=) 7...Bb4–+ 8.Qb4 (8.Nc3 Qf6 9.Nf3 Bc3 10.dc3 Qc3 11.Qc3 Nc3–+) 8...Qf6 9.Nc3 (9.f3 Qb2 10.Qb3–+) 9...Qf2 10.Kd1 Qf1 11.Kc2 Qa1 12.Ne4 Qa2 13.Kd3 Qb2 (better is 13...d5 14.Nc3 dc4 15.Qc4 Qc4 16.Kc4–+) 14.Qc5 (14.Qb2 ab2 15.Nc3–+) 14...a2 15.Qc7 Ra3 (better is 15...Na6 16.Nd6 Ke7 17.ba6–+) 16.Nc3 0–0 (better is 16...a1Q 17.Qc8 Ke7 18.Qc5 Kd8 19.Qe5–+) 17.Nf3 Nc6! 18.bc6 a1Q (better is 18...bc6 19.Ke3 Qb4–+) 19.Ra1 Ra1 20.cd7 Bd7! 21.Qd7 Raa8 22.Qe7 (22.Qb5 Rfd8 23.Ke3 Rd2 24.Qb2 Rb2–+) 22...Rad8 23.Ke3 Qb6 (better is 23...Rd2! 24.Nd2 Qc3 25.Kf2 Qd2 26.Qb7 Qf4 27.Kg1 Qe3 28.Kf1–+) 24.Kf4 (24.c5 Qb4–+) 24...Qd6 (better is 24...Rfe8 25.Qh4 e5 26.Kg3–+) 25.Qd6 Rd6 26.Ne4 Rc6 27.Ne5 Ra6 28.d3 Ra2 29.Kf3 f6 30.Nd7 Rd8 (better is 30...Rc8!? 31.Nec5–+) 31.Ndc5 b6 32.Ne6 Re8 33.Nd4 Re5 34.Nc3 Ra8 (34...Rb2 35.Ne4–+) 35.Ncb5 g6 36.Nc7 Rc8 (better is 36...Ra4!?–+) 37.Nd5+= Rd8 38.Nc6 (38.e4!?+=) 38...Rf5–/+ 39.Kg3 Re8?? (39...Rg5 40.Kf3 Rd6 41.e4–/+) 40.e4 (better is 40.Nce7!? Kf7 41.Nf5 gf5 42.Kf3+=) 40...Rg5 41.Kf3 Re6 42.Nd4 Rd6 43.Nb5 Re6 44.Nd4 Rd6 45.Nb5 Rd7?? (better is 45...Rd8=) 46.Nf6+– Kg7 47.Nd7 Rh5 48.h3 Kf7 49.Nb6 Re5 50.Nd5 h5 51.c5 Ke6 (51...Re6 52.Nd6 Kf8+–) 52.c6 Kf7 53.c7 Re8 54.Na7 (54.Nd6 Kg7 55.Ne8 Kg8 56.Nef6 Kf8 57.c8Q Kg7 58.Qd7 Kh6 59.Ng8 Kg5 60.Qe7) 54...Ke6+– 55.c8Q Rc8 56.Nc8 Ke5 57.Ke3 h4 58.Nce7 (better is 58.Nc7 Kf6 59.d4 Kg7+–) 58...g5 59.Ng6 (59.Ng6 Ke6 60.Kf3+–) 1–0. mikebaldini (1675) – redeye105, gameknot.com, 2014.

4.Nc3 d5 =.

4.e3 f5 5.a3 c6 6.Nc3 Qa5 7.Qh5 g6 8.Qh4 Bg7 9.Bb2 Kf7 (9...Bf6 10.Qg3+/–) 10.Nf3+/– h6 (10...cb5 11.cb5 Bf6 12.Qg3+/–) 11.Qg3 g5 12.h4 (12.c5 Ke8+/–) 12...g4+/– 13.Ne5 Ke8 14.Ne4! Ne7 (14...fe4 15.Qg4) 15.Nd6 (better is 15.Nc6!? bc6 16.Bg7 fe4 17.Bh8 cb5 18.cb5 d5+–) 15...Kf8 16.Nc8 Nc8 17.Ng6 Kg8 18.Bg7 (18.Nh8 Bb2 19.Rb1 Bh8=+) 18...Kg7 19.Qe5 Kg6 20.Qh8 Qc7 (20...Nd6 21.h5 Kf7 22.bc6 Nc6 23.Qh6+–) 21.Qg8 Kf6 22.Qf8 Kg6 23.h5 Kh7 24.Qf7 Kh8 25.Qf6 Kg8 26.Qg6 Kf8 27.Qh6 Ke8 1–0. ghost (2565) – Tao_Warrior (2310), ICC, 2003.

4.e3 Nf6 5.d4 =.

3.c4 Nf6

4.a3 d5 5.e3 Bf5 6.Nc3 g6 (6...dc4 7.Qf3 Bc8 8.Bc4=) 7.Na4 (7.d4 Bg7+=) 7...Bg7 (7...dc4 8.Bc4 Be4 9.Nf3+=) 8.Nc3 (8.d4 Nbd7+=) 8...c6 (8...dc4 9.Bc4 Bd3 10.Bd3 Qd3 11.Qe2 Qe2 12.Nge2+/–) 9.Qb3 Nbd7 (9...d4 10.ed4 0–0 11.Nge2+/–) 10.d4 0–0 (10...c5 11.cd5 cd4 12.ed4+=) 11.h3 (11.cd5!? c5 12.Nf3+/–) 11...c5 12.Nf3 cd4 13.Nd4 Nc5 14.Qa2 Nfe4 (14...Be4 15.cd5 Nd5 16.Ne4 Ne4 17.Qc2=) 15.Ne4 (15.Nd5!? e6 16.g4 ed5 17.gf5+=) 15...Be4= 16.Be2 (16.f3 e5 17.Nc2 Nd3 18.Ke2 Nc1 19.Rc1 Bc2 20.Rc2 d4=+) 16...Bg2=+ 17.Rg1 Bh3 18.Rb1 (18.cd5!? e5 19.Nc2=+) 18...Ne4–/+ 19.Bb2?? (better is 19.Rb4–/+) 19...Qa5 (20.Bc3 Qc3 21.Qd2 Qd2#) 0–1. Sulak,E – Lewandowicz,P, corr Poland, 1991.

4.Nc3 a3 5.Qb3 e6 6.Nf3 b6 7.Nd4 (7.e4 Bb7 8.e5 Nh5+=) 7...Bb7 8.Nc2 Ng4 9.h3 (< 9.Na3 Bc5 10.e3 Qf6–/+) 9...Qh4 10.g3 Qf6 11.f3 Bf3 12.Rg1 (better is 12.ef3!? Qf3 A) 13.Na3? Qg3 (13...Qh1?! 14.hg4 Bc5 15.Ne2=+) 14.Ke2 Nf2–+; B) 13.Ba3? Qf2 (13...Qh1?! 14.hg4 Ba3 15.Na3=+; 13...Qg3?! 14.Ke2–+) 14.Kd1 Qf3 15.Ke1 Qg3 (15...Qh1?! 16.hg4 Ba3 17.Na3=+) 16.Ke2 Nf2–+; C) 13.hg4 Qh1 14.d4=) 12...Nh2–/+ 13.Ba3 Ba3 (13...Nf1 A) 14.ef3? Nh2 15.0–0–0 Nf3 (< 15...Qf3 16.Bf8 Rf8 17.Rde1–/+) 16.Bf8 Ng1 (< 16...Kf8 17.Rgf1+/–; 16...Rf8?! 17.Rgf1=) 17.Bg7 Qg7 18.Rg1 Qh6–+; B) 14.Rf1 Ba3 15.Rf3+/– (< 15.ef3 Be7=+; 15.Na3?! Qe7 16.Rf3 Ra3=)) 14.Na3 Qd4 (14...Nf1?! 15.Rf1 (15.ef3? Nh2 16.0–0–0 Nf3–+) 15...Qe7 16.Rf3 Ra3 17.Qb2=) 15.e3 Qd6 16.Nc2? (better is 16.Nab1!?–/+) 16...Nf1–+ 17.Kf1 Qd3?? (better is 17...Qd2 18.e4 f5 19.ef5 0–0–+ (19...ef5?! 20.Re1 Be4 21.Ne4 fe4 22.Re4 Kd8 23.Rg2=)) 18.Ke1 c5 19.bc6 Nc6 20.Nb4 Nb4 21.Qb4 Rc8 22.Rf1 Bg2 23.Rf2 Bh3 24.Qb6 0–0 25.a4 Rc4–/+ 26.Nd1 Qe4 27.Rh2? Bg4 28.Qd6 Ra4 29.Rc1 Bd1 30.Kd1 Ra7 31.Ke2 h6 32.Rf1 Qc4 33.Kf2 Qc7 34.Qd4 f5 35.Rfh1 e5 36.Qd5 Kh7 37.Ke2 Ra5 38.Qb3 d5 39.Qb1 e4 40.Rh3 Rf6 41.Qb4 Qc4 42.Qc4 dc4 43.Rc1 Rc6 44.Rc2 Ra4 45.g4 fg4 46.Rh4 Rg6 47.Kf2 Rg5 48.Kg3 h5 49.Rb2 Rf5 50.Rh1 g6 51.Rb8 Kh6 (52.Rc1 Kg5–+) 0–1. Gedigk – Husslein, corr SOK–88–18, 1989.

4.Nc3 e6 =.

3.c4 g6

4.Bb2 Nf6= 5.a3 Bg7 6.Nc3 0–0 (6...e5 7.Na4 d6 8.Nc3=) 7.Na4 d5 (7...d6 8.Nf3=) 8.e3 (8.cd5 Qd5 9.Nc3 Qd6+=) 8...Be6 (8...Bg4 9.Nf3=) 9.Nc5+= Nbd7 (9...Bc8 10.cd5 b6 11.Nd3+=) 10.Ne6+/– fe6 11.d4 (11.Nf3 Nc5+/–) 11...Nb6 (11...Ne4 12.Nf3+/–) 12.Qb3 Na4 13.Bd3 (13.Nf3 Ne4+/–) 13...c6 (13...e5 14.de5 Nd7 15.Bd4 (15.cd5 Ndc5 16.Qc2 Nd3 17.Qd3 Nb2–+) 15...Ne5 16.Rd1+/– (< 16.cd5 Nd3 17.Qd3 Qd5=+)) 14.Ne2+/– Qa5 (14...c5 15.0–0+/–) 15.Bc3 Nc3 16.Qc3 Qc7 (16...cb5 17.cb5 e5 18.Qa5 Ra5 19.de5+/–) 17.Nf4+– Qd7 18.bc6 bc6 (18...Qc6 19.Rc1+–) 19.0–0 (19.Qc2 Ra5+–) 19...e5 20.Ne2 (20.de5 Ng4 21.cd5 cd5+/–) 20...e4 (20...ed4 21.ed4 (< 21.Nd4 c5=+; 21.Qd4?? Ne4–+) 21...c5 A) < 22.dc5 Ng4 23.Qb3 Qc7–/+ (< 23...Ba1 24.Ra1 Qc7 25.Ng3–+); B) 22.Rae1+/–) 21.Bc2+= Qg4 22.Ng3 h5 23.h3 Qg5 24.Ne2 e5 25.a4 h4 26.Ra2 Nh5 27.cd5 cd5 28.Qc6 ed4 29.ed4 Kh7 30.Qc3 Rf3= 31.Qc6 Raf8 32.Be4?? de4–/+ 33.Qe4 R3f7 34.a5= Ng3 35.Ng3 hg3 36.f3 Rf4 37.Qb7 R8f7 38.Qb8 Bd4 39.Kh1 Qf5 40.Qb3?? Rh4–+ (41.Qc2 Rh3 42.gh3 Qh3 43.Qh2 gh2 44.Rh2 Qh2 45.Kh2 Ra7–+) 0–1. Zhukov,Yury – Bondarev,Boris (2085), Ch South Region (open), 2005.

4.Bb2 Nf6 5.a3 Bg7 6.e3 b6 7.Nf3 Bb7 8.Be2 0–0 9.0–0 d6 10.d3 Nbd7 11.d4 e5 12.Nc3 e4 13.Nd2 Re8 14.Na4 Kh8 15.Nc3 Ng8 16.a4 f5 17.Nb3 Qg5 18.Nd5 Bd5 19.cd5 Rf8 20.a5 ba5 21.Ra5 Ra5 22.Na5 f4 23.ef4 Rf4 24.Bc1 Bd4 25.Qd4 1–0. mtr – nogood10, Caissa's Web, 2001.

4.Bb2 Nf6 5.e4 d6 6.Nf3 Bg7 7.Be2 Nbd7 8.0–0 e5 9.Nc3 0–0 10.a3 Nc5 11.d4 ed4 12.Nd4 Nfe4 13.Ne4 Ne4 14.Re1 Nc5 15.Qd2 Bd7 16.Bf3 Re8 17.Bd5 Qf6 18.Rab1 Re1 19.Re1 Nb3 20.Nb3 Qb2 21.Qf4 Rf8 (21...Rf8 22.Nc1 Qa3–+; 21...Qb3 22.Qf7 Kh8 23.Qd7 Qa3 24.Bb7=; 21...ab3?! 22.Qf7 Kh8 23.Qd7=) 0–1. Topot,Iwan (1695) – Adrenalyn,Roman (1940), SL–2006–0–00046, 2006.

4.Bb2 Nf6= 5.e4 Bg7 =.

4.d4 Bg7 +=.

3.e3 d5

4.Nf3 Bg4 5.Ba3 Nd7 (5...e5 6.Bf8 Kf8 7.Be2=) 6.d4 Ngf6 7.c4 (7.Be2 e6=) 7...c6 (7...e5 8.Bf8 Rf8 9.Be2=) 8.bc6 bc6 9.Nbd2 Ne4 10.h3 Bh5 (10...Nd2 11.Qd2 Bf3 12.gf3=) 11.Bd3 Qa5 12.Qc2 White plans c5 12...Bf3 13.gf3 Nd2 14.Qd2 Qd2 15.Kd2 e5 16.c5 (16.Bf8 Rf8 17.cd5 cd5 18.de5 Ne5=) 16...Be7 (16...g6 17.Rab1=) 17.Rab1 Bf6 18.Kc3 g6 19.Rb7 (19.f4 ed4 20.ed4 Bh4=) 19...ed4 Black fights for the Initiative 20.ed4 Nf8 21.Re1 Ne6–/+ 22.Re6 fe6 23.Rc7 e5 24.Rc6 ed4 25.Kc2 0–0 26.Rd6 Be7 27.Rd7 Rf7 28.Kd1 Kf8 29.Rd5–/+ Rf3 30.Ke2 Rh3 31.Rd4 Rh4 32.Rh4–/+ Bh4 33.Ke3 Be7 34.Kd4 Rc8 35.Bc2 Rc7 36.Kd5 Kf7 37.Bb4–/+ Ra7 38.Kc6 h5 39.Kb6+= Ra8 40.Kb7 Rf8 41.Ba4 The passed pawn on a2 quickly leads to threats 41...h4 42.Bc6? h3 43.a4? h2 44.a5–/+ Ke6 45.a6 Rf7 46.Kb6+= Bd8 47.Kb5 g5 48.Ba5?? Ba5–+ 49.Ka5 g4?? 50.Kb6= Rf3 51.Bf3 gf3 52.a7 h1Q 53.a8Q ½–½. Weber,Bernd – Boehnisch,Manfred, DDR–ch U18 Ruhla, 1957.

4.f4 Nf6 5.Nf3 Bd7 6.Be2 e6 7.0–0 Bd6 8.Bb2 0–0 9.Ne5 Qe8 10.c4 dc4 11.Nc4 (worse is 11.Bc4 Bb5 12.Na3 Bc4 13.Nec4 Be7–/+) 11...Bb5 12.Nd6 cd6 13.Bf6 gf6 14.Nc3 Be2 15.Qe2 f5 16.e4 fe4 17.Ne4 f5 18.Ng5 Rf6 19.Rab1 Qc8 20.Rfc1 Nc6 21.Rb6 Qc7 22.Rcb1 Na5 23.Ne6 Qe7 24.Nd4 Qe2 25.Ne2 Re6 26.Nd4 Re4 27.Nf5 Rf4 28.Nd6 Rd4 29.Nb7 Nc4 30.R6b4 Nd2 31.Rd4 Nb1 32.Nc5 Nc3 33.a3?? Ra5 34.Rc4 Nd5 35.Na4 Ne3 36.Re4 Nc2 37.Rg4 Kf7 38.Nb6 Ra3 39.h4 Ne3 40.Rf4 Ke6 41.Kh2 Ke5 42.Rf3 Nf1?? 43.Kg1 Rb3 0–1. lllllll21 – otkrovenie (1635), kurnik, 2011.

2.b5 b6

3.a3 Bb7 4.e3 Nf6 5.Nf3 h6 6.Be2 e6 7.Bb2 Be7 8.0–0 0–0 9.Ne5 d6 10.Nc6 Nc6 11.bc6 Bc6 12.Bf3 Qd7 13.Bc6 Qc6 14.Nc3 b5 15.Ne2 e5 16.d4 Rad8 17.Rc1 e4 18.c3 d5 19.h3 Nh7 20.Nf4 Qd6 21.Qb3 c6 22.a4 Rb8 23.Qc2 c5 24.Ba3 Qb6 25.Nd5 1–0. cogit – curara2000, kurnik, 2012.

3.Ba3 Bb7 =.

3.Ba3 Nc6?? 4.bc6+– Bb7?? 5.cb7 Ra7 6.e4 Rb7 7.Qf3 c6 8.Nc3 Qc7 9.0–0–0 e6 10.Nge2 Ba3 11.Kb1 b5 12.Nd4 c5? 13.Nb3 Nf6?? 14.Nb5+– Qc6 15.Na3 Qa4 16.e5 c4 17.Nc4 Nd5 18.Nd6 Ke7 19.Nb7 Qb4 20.N7a5 Qa3 21.Bc4 Nb4 22.Nb7 d5 23.Qc3 Qa2 24.Kc1 Rc8 25.Qb4 Kd7 26.Qd6 Ke8 27.Bb5 Rc6 28.Bc6 1–0. dimiternikolov – idontknow, net–chess.com, 2006.

3.a4 Na6?? 4.ba6+– Ba6 5.Nf3 Qb8 (5...Nf6 6.Nc3+–) 6.e4 (6.Nc3 Nf6+–) 6...Qb7 (6...Bf1 7.Kf1 e6 8.Bb2+–) 7.Ba6 Qa6 (7...Ra6 8.Nc3+–) 8.d3 0–0–0 (8...g6 9.Nc3 Bg7 10.e5+–) 9.Ne5 d6 (9...Nh6 10.Bh6 gh6 11.Nf7 Bg7+–) 10.Nf7 Nf6 (10...Rd7 11.Nh8 e5 12.Nc3+–) 11.Nd8 (better is 11.Nh8 e5+–) 11...Kd8 12.0–0 g6 13.Bb2 Rg8 (13...Bg7 14.Na3+–) 14.Bf6 ef6 15.Nc3 f5 (15...Bg7 16.Rb1+–) 16.ef5 gf5 17.Nb5 (17.Qh5 Qb7 18.g3 c6+–) 17...c6 (17...Qb7 18.g3 c6 19.Qf3+–) 18.Nc3 (better is 18.Qh5 Qb7 19.Nd4 Qd7+–) 18...b5 (18...Bg7 19.Ra3+–) 19.ab5 cb5 20.Qh5 (better is 20.Qf3 Bg7 21.Qd5 Bc3 22.Qg8 Kc7 23.Qh7 Kb6+–) 20...Qc6 21.f3 (better is 21.Ne4! fe4 22.Qf7 Rg2 23.Kg2 ed3 24.f3 Qe8 25.Qh7 Qe2 26.Rf2 Qe7 27.Qe7 Be7 28.Ra5 b4+–) 21...Qc3 22.Qf7 (better is 22.Qh7 Rh8 23.Qa7+–) 22...Qc2 (22...Qg7 23.Qg7 Rg7 24.Ra5 Rc7+–) 23.Qg8 Kd7 24.Qf7 Kd8 25.Rac1 Qd3 26.Qf8 Kd7 27.Rfe1 Qd4 28.Kh1 h5 29.Qe8 1–0. tomy (2255) – idontknow, net–chess.com, 2007.

3.a4 d6 4.c4 (4.d4 Nf6=) 4...Nf6 5.Bb2 e5 6.e3 Bb7 7.Nf3 Nbd7 8.Be2 Be7 9.0–0 0–0 10.Qc2 Re8 11.Nc3 Bf8 (11...c5 12.bc6 Bc6 13.d4=) 12.Ng5 (12.d4 ed4 13.Nd4 Nc5+=) 12...g6 (12...Be7 13.f4=) 13.f4 ef4 14.ef4 Bg7 15.Bd3 White prepares the advance f5 (15.Rae1 Rc8+=) 15...Nc5 16.f5 Nd3 17.Qd3 Rf8 (17...Nd7!? 18.fg6 fg6=) 18.fg6+= hg6 (worse is 18...fg6 19.Ne6 Qd7 20.Nf8 Rf8 21.Rf4+–) 19.Qh3 (19.Rae1 Nd7 20.Qg3 Bd4 21.Kh1 Ne5+=) 19...Bc8 (better is 19...Qd7!?=) 20.Qh4+/– Bf5? (20...Nh5 21.Rae1 Bf6=) 21.Nd5 Do you see the mate threat? 21...Re8 (21...Nh5 22.Bg7 Kg7 23.Rf5 Qd7+–) 1–0. Rohrbacher,Walter – Glatzer,Karl, Baden–ch Sen, 1988.

3.a4 h6 4.Bb2 e6 5.e3 Bb7 6.Nf3 Bf3? (better is 6...Nf6!?=) 7.Qf3+/– c6 8.c4 Ra7 9.Be2 d5 10.cd5 (better is 10.Nc3!? Nf6 11.bc6 Nc6 12.cd5 ed5 13.Nb5+–) 10...cd5+/– 11.0–0 Ne7 (11...Nf6 12.Rc1+/–) 12.Qg3 (12.Nc3 Nd7 13.d4 Nf6+/–) 12...Rg8 (12...Nf5!? 13.Qh3 Nd7+=) 13.Nc3 Nd7 14.d4 Nf6 15.Bd3 g5 16.Ba3 (16.e4 Nh5 17.Qf3 Nf4+/–) 16...h5 17.Qe5 (17.Rfc1!?+/–) 17...Ng4 18.Qg3 f5 (better is 18...Nf6!?=) 19.h3 h4 20.Qd6 Qd6 21.Bd6 Nf6 22.Rac1 Ng6 23.Bf8 Kf8 24.Ne2 g4 (24...Ne7!?+=) 25.hg4+/– Ng4 26.Rc8 (26.Rc6 Ke7 27.Rb6 h3 28.gh3 Ne3 29.fe3 Ne5 30.Kh2 Nd3+–) 26...Kg7 (26...Kf7 27.Rg8 Kg8 28.Rc1+=) 27.Rg8 (27.Rc6 Kf6 28.Nc3 Ne7 29.Rb6 h3+/–) 27...Kg8+= 28.Rc1 Rh7? (better is 28...Kf7+=) 29.Rc8 (better is 29.Rc6 Rb7 30.Bf5 ef5 31.Rg6 Kf7+–) 29...Nf8? (better is 29...Kf7 30.Rc7 Ne7+–) 30.Nf4 h3 (30...Re7 31.Ne6! Re6 32.Bf5 Re3 33.fe3 (33.Bg4?! Rd3+/–) 33...Ne3 34.Be6 Kg7 35.Rc7 Kh8 36.Bf7+–) 31.Nh3 (better is 31.gh3 Nf6 32.Ne6+–) 31...Nf6 32.Ng5 Re7 33.g3 Ne8? (33...Kg7 34.f4+–) 34.Nf3 (34.Rc6 Kg7 35.Rb6 Kf6+–) 34...Nd6?? (34...Nf6+–) 35.Rc6 Nf7 (35...Ne4 36.Rb6 Nc3 37.Bc2+–) 36.Rb6 Kg7 37.Ra6 Kh6 (37...Kf6 38.Ra5 Rb7 39.Ra6+–) 38.Ra5 Kh5 (38...Nd7 39.Ra7 Nd8 40.Ne5 Ne5 41.Re7 Nd3 42.a5+–) 39.Ne5 (better is 39.b6!? Nd6 40.Ra7 Rb7+–) 39...Ne5 40.de5 Ng6 (40...Kg6 41.b6 Rb7 42.Ra8+–) 41.Be2 Kg5 (41...Kh6 42.f4 Nf8 43.Ra8+–) 42.f4 Kh6 43.Ra6 Nf8 (43...Kh7 44.a5 Rg7 45.Re6+–) 44.b6 Rb7 (44...Re8 45.a5 Rc8 46.b7 Rc1 47.Kf2+–) 45.a5 Nd7 (45...Rb8 46.Ra7 Kg6 47.Kf2+–) 46.Ra7 Nc5 47.Rb7 Nb7 48.a6 Nc5 49.b7 Na6 (49...Nd7 50.a7 Kh7 51.b8Q Kg6 52.Qg8 Kh6 53.Qh8 Kg6 54.Bh5) 50.Ba6 Kh5 (50...Kg7 51.b8Q d4 52.ed4 Kf7 53.Qd8 Kg7 54.Bc8 Kf7 55.Qf6 Kg8 56.Be6 Kh7 57.Qg5 Kh8 58.Qh6) 51.b8Q Kg4 (51...Kh6 52.Qg8 d4 53.ed4 Kh5 54.Qg5) 52.Kg2 (52.Be2 Kh3 53.Kf2 d4 54.Qh8) 52...Kh5 1–0. Fournier,Frederic (2090) – guestpnfp, jeu.europe–echecs.com, 2013.

3.Bb2 d5 4.e3 a4 5.a3 Bd7 6.h3 Ra5 7.Bc3 Ra7 8.Nf3 e6 9.Ne5 Qe7 10.Bb4 Qf6 11.Nd7 Qa1? (better is 11...Nd7!? 12.Bc3 e5=) 12.Nf8 Nf6 13.Bc3 Qa2 14.Bb4 (better is 14.Qc1 d4 15.Bd4+/–) 14...c5?? (better is 14...Qb2=) 15.bc6!+– Nc6 16.Bd6?? Rf8?? 17.Bf8 Kf8= 18.Bb5 Na5 19.0–0 Nc4 The isolani on a3 becomes a target 20.d3 Nb2?? 21.Qd2+– Rc7 22.Qb4 Kg8 23.Nc3 Rc3 24.Qc3 h6 25.Qc8 Kh7 26.Qd8 Qa3 27.Qb6 Qb4 28.Rb1 a3 29.Qc6 a2+= 30.Ra1 Qa3?? 31.Qa6+– Qb4 32.Ra2?? Nd1? 33.Ra1 Qd2 34.Qa5?? Qf2–+ 35.Kh2 Ne3 36.Rg1 Nh5 37.c4?? Qg3 38.Kh1 Nf4 39.Qe1+= Qe1 40.Re1 Neg2 41.Rd1 dc4 42.dc4 Ne3 43.Rc1 Nc4 44.Bc4 f6 45.h4 e5 46.Kh2 Kg6 47.Kg3 h5 48.Bf1 Kf5 49.Rc7 (49.Rc7 g5 50.Ba6+/–) 1–0. cogit – rgmerke, kurnik, 2012.

3.c3 Bb7 4.c4 Nf6 5.Bb2 (5.Nf3 e6=) 5...e6 6.e3 (6.Nf3 Bc5=) 6...d5 (6...Bb4 7.Nf3=) 7.Nf3 (7.cd5 Nd5 8.Nf3 Nd7=) 7...Be7 (7...c5 8.Be2=) 8.Be2 (8.cd5 Bd5 9.Nc3 Bb7=) 8...0–0 9.0–0 c5 (9...dc4 10.Bc4 c6 11.Nc3=) 10.bc6 (10.d3 Bd6=) 10...Nc6 11.Nc3 dc4 12.Bc4 Rc8 (12...Nb4 13.Ne5=) 13.Qe2 (13.d3 Nb4=) 13...Ng4 (13...Nb4=) 14.d4 (14.Nb5!?=) 14...Qc7–/+ 15.Nb5 (15.g3 Nce5 16.Ne5 Ne5 17.de5 Qc4 18.Qc4 Rc4–/+) 15...Nd4 16.Bd4 (16.Nfd4 Qh2) 16...Qc4 17.Qc4 Rc4 18.Bb6 (18.Rfc1 Bd5–/+) 18...Rb4 (18...Bf3 19.gf3 Rb8 20.Nd4 Rb6 21.fg4–+) 19.Rab1 (better is 19.a4!? Ra8 20.Rfc1+=) 19...Ba6–/+ 20.Nfd4? (20.a4!? Ra4 21.Rfc1–/+) 20...Bb5–+ 21.Nb5 Rb8 (21...Rb8 22.Ba5 R4b5 (22...R8b5?! 23.Bb4 Rb4 24.Rb4 Bb4 25.Rb1+=) 23.Rb5 Rb5–+) 0–1. Morozevich,A – Kastor, ICC, 2000.

3.c4 a4 4.Nc3+= h5 5.d4 h4 6.e4 f6 7.Qg4 f5?? 8.Qg6 1–0. Fritz 8 – NN, 2005.

3.c4 c6 4.Nc3 e6 (4...Nf6 5.Nf3=) 5.Nf3 d5 6.bc6 Nc6 (worse is 6...dc4 7.Qa4 Na6 8.e4+/–) 7.cd5 ed5 8.e3 Nf6 9.Bb5 Bb7 10.Bb2 Be7 11.0–0 0–0 12.d4 Rc8 13.Qb3 Exerts pressure on the isolated pawn 13...Bb4 14.Rfc1 Qd6 (14...Re8 15.Rab1+=) 15.a3+/– Bc3 16.Bc3 Ne4 17.Bd3 Ne7 18.Be1 Ng6 (18...Ra8 19.Ne5+/–) 19.Rc8 (19.Rcb1 Rc6 20.Ba5 ba5 21.Qb7+/–) 19...Rc8 (19...Bc8!? 20.Rb1 Bg4+/–) 20.Rb1+– Rc6 21.Ba5! ba5 22.Qb7 h6 (22...Nf8!?+–) 23.Qa8 Kh7 24.Qa5 f6 25.Ne1 h5?? (25...Qe6+–) 26.Be4 1–0. Fournier,Frederic (2470) – Dragon (2000), echecsemail.com, 2010.

3.c4 e6 4.Bb2 Bb7 5.e3 Nf6 6.Nf3 d6 7.d4 Nbd7 8.Nc3 Be7 9.Bd3 Nf8 (9...0–0 10.Qc2=) 10.e4 (10.0–0 Ng6+=) 10...N8d7 (10...Ng6 11.0–0+=) 11.0–0 Nf8 12.e5 (12.d5 Ng6+/–) 12...N6d7 13.Re1 (better is 13.ed6 cd6 14.d5+/–) 13...c6? (better is 13...de5 14.Ne5 Ne5 15.de5 Ng6+=) 14.Be4 White prepares the advance d5 14...Nb8 (better is 14...d5 15.bc6 de4 16.cb7 Rb8 17.Ne4 Rb7+–) 15.a4 (15.bc6 Nc6 16.ed6 Qd6+–) 15...Nfd7 (15...d5 16.bc6 Bc6 17.cd5 ed5 18.Bf5+/–) 16.Qd3 (16.ed6 Bd6 17.bc6 Nc6+–) 16...Nf8? (better is 16...de5!? 17.Rad1 ed4 18.Nd4 Qc8+=) 17.d5+– ed5 18.cd5 c5 19.e6 f6 20.Re3 Qc7 21.Nd2 Kd8 22.Rh3 h6 23.Re1 Kc8 24.Ree3 Qd8 25.Reg3 g5 26.Nd1 h5 27.Rg5 Qe8?? 28.Ne3 fg5 29.Bh8 Ne6 30.de6 Qh8 31.Bb7 Kb7 32.Qe4 Ka7 33.g4 h4 34.Nd5 Qd8 35.Nc4 Nd7 36.ed7 Qd7 37.Qe7 (37.Qe7 Qe7 38.Ne7+–; better is 37.Ncb6!? Qb7 38.Na8 Bd8 39.b6 Kb8+–) 1–0. Nielsen (2475) – Ebmeyer, corr ICCF EU/I/GT/42, 1969.

3.c4 Nh6 4.d4 e6 5.Bh6 gh6 6.a3 Bg7 7.e4 Bb7 8.Nc3 c6 9.Nf3 cb5 10.Nb5 d6 11.Bd3 Na6 12.0–0 0–0 13.Qa4 f5 14.ef5 ef5 15.Be2 Qe8 16.Rae1 Rd8 17.c5 dc5 18.Bc4 Bd5 19.Re8 Rfe8 20.Nd6 Re6 21.Bd5 Rdd6 22.Qe8 Bf8 23.Be6 Re6 24.Qe6 Kh8 25.Qb6 cd4 26.Qa6 Ba3 27.Qa5 Bf8 28.Nd4 Kg8 29.Qc7 Bb4 30.Nf5 Bf8 31.Re1 Bd6 32.Qg7 1–0. marekt – uly333, gameknot.com, 2001.

3.d3 c6 4.c4 =.

3.e3 d6 4.Nf3 e5 5.d3 Nf6 6.Be2 Bd7 7.a4 (7.c4 Be7+=) 7...c6 8.c4 d5 (8...Be7 9.0–0=) 9.bc6 (9.Ne5 Bb4 10.Bd2 0–0+/–) 9...Bc6 (9...Nc6 10.d4 e4 11.Ne5=) 10.cd5 (10.Ne5 dc4 11.Bf3 Bf3 12.Qf3 Ra7 13.dc4 Bb4 14.Bd2 Qd6+=) 10...Bd5 (10...Bb4 11.Bd2 Qd5 12.Nc3=) 11.0–0 Be7 (11...Nc6 12.Bb2+=) 12.Nc3 (12.Ne5 Nc6 13.Nc6 Bc6+/–) 12...Bf3 13.Bf3 (worse is 13.gf3 Nc6=) 13...Ra7 14.Nb5 Rd7 15.d4 ed4 (15...e4 16.Bg4 Rd5 17.f3 Ng4 18.fg4+=) 16.Nd4 0–0 17.Qb3 Bc5 18.Bb2 Qc7 (18...Re8 19.Rab1+/–) 19.Rac1 Na6 (19...Qe5 20.Qb5 Bd6 21.g3+/–) 20.Nb5 (20.Nf5 Qd8+/–) 20...Qd8 21.Rfd1 Qe7 22.Rd7 Nd7 23.Qc3 Nf6 24.Rd1 Nb4 25.Nd4 Qe5 26.Nc6 Qc3 27.Bc3 Nc6 28.Bc6 h6 29.Kf1 Nh7 30.Bb5 Rc8 31.Bd4 Nf8 32.Ke2+/– Ne6 33.Be5 Rd8 34.Rd8 Nd8 35.Bc7 Ne6+= 36.Bd7?? Nc7–+ 37.f3 Kf8 38.e4 Ke7 39.Bc6 Bg1 40.h3 Kd6 41.Bb7 Kc5 42.Kd3 Kb4 43.Bc6 Ne6 44.Be8 Nc5 45.Kc2 f6 46.g4 Na4 47.Ba4 Ka4 48.Kb2 Kb4 49.f4 a4 50.e5 fe5 51.fe5 Bd4 (51...Bd4 52.Kc2 Be5–+) 0–1. Fournier,Frederic (1675) – Forsgren, Active, 2006.

3.e3 e6 4.Bb2 Nf6 5.Nf3 Bb7 6.Be2 d5 7.0–0 Nbd7 8.Nd4 Bd6 9.Nc6 Bc6 10.bc6 Ne5 (10...Nc5 11.Nc3+=) 11.f4 Ng6 (11...Nc6 12.Bb5 Qd7 13.c4+–) 12.Nc3 (12.c4 0–0+=) 12...0–0 (12...Ne7 13.Bb5=) 13.Nb5+= Ne7 (13...e5 14.fe5 Be5 15.d4+=) 14.Bf6 gf6 15.Rc1 Nc6 16.c4 Ne7 17.cd5 Nd5 18.Bc4 c6 (better is 18...Bb4!?+=) 19.Bd5+– cd5 20.Qh5 White intends f5 20...Bb4?? (better is 20...Qd7 21.Rf3 Bf4 (21...Qb5?? 22.Rg3 Kh8 23.Qh6 Qf1 24.Kf1 Rg8 25.Qf6 Rg7 26.Qg7) 22.ef4 Rfc8+– (22...Qb5 23.Rg3 Kh8 24.Qh6 Qf1 25.Kf1 Rg8 26.Qf6 Rg7 27.Qg7)) 21.Rf3 Re8 (21...Bd2?? 22.Rg3 Kh8 23.Rh3 Be3 24.Kh1 h6 25.Qh6 Kg8 26.Rg3) 22.Rc7 Qc7 23.Nc7 Kg7 (23...Kf8 24.f5 Ke7 25.fe6 fe6 26.Qh7 Kd6 27.Na8 Ra8 28.Rf6+–) 24.f5 Bd2 (24...Rac8 25.Rg3 Kf8 26.Ne6 Ke7 27.Qf7 Kd6+–) 25.fe6 Re6 26.Ne6 fe6 27.Rg3 Kh8 28.Qh6 Be3 29.Re3 1–0. yzerman123 (2255) – decu40 (1925), gameknot.com, 2015.

3.e3 g6 4.Bb2+= Nf6 5.c4 Bg7= 6.Nf3 0–0 7.d4 Bb7 8.Nbd2 d6 9.Be2 Nbd7 10.0–0 c5 11.bc6 Bc6 12.Ng5 h6 13.Bf3 d5= 14.cd5 Bb5=+ 15.Ne6 fe6 16.de6 Bf1 17.Qf1 Rc8 18.ed7 Qd7 19.Nc4 Qb5 20.Rc1 Rc7 21.a4 Qa4= 22.Nb6 Rc1 23.Na4 Rf1 24.Kf1 Rb8 25.Bc3 Rb5 26.Bc6 Rf5 27.e4 Rf4= 28.f3 Ng4 29.Ke2 Nh2 30.Nc5 Rf8 31.Ba5 Rb8 32.Bd5 Kh8 33.Nb3 Rc8 34.Kf2 e5 35.Kg1 Nf3 36.gf3 ed4 37.f4 g5 38.Bd2 gf4 39.Bf4 Rc2 40.e5+/– h5 41.Kf1 d3 42.e6 Bf6 43.Nd2 Kg7 44.Be4 Rc3+= 45.Kf2 Ra3 46.Ke3+– Ra6 47.Bd5+/– Kf8 48.Bc4 Rc6 49.Kd3 Ke7 50.Bd5 Re6 51.Be6 Ke6 ½–½. Gretencord,Ulrich (2015) – Gnuechtel,Andreas (1865), DESC, 2001.

3.e4 c5 4.d4 e6 5.Nf3 Ne7 6.dc5+/– bc5 7.c4 Ng6 (8.Bb2 d6+/–; 7...d5 8.Nbd2+/–). marcosr – colamiju, net–chess.com, 2005.

3.e4 d5 4.ed5 Qd5 5.Nc3 Qe6 6.Nge2 Bd7 7.d4 Qd6 8.Bf4+– Qb4 9.Rb1 Qc4+/– 10.a3 e6? 11.Qd2+– Bd6 12.Bg3 Nf6?? 13.Nf4 Bf4 14.Bf4 Ne4 15.Bc4 Nd2 16.Kd2 c6 17.Na4 cb5 18.Nb6 Ra7 19.Bb8 0–0 20.Ba7 bc4 21.Nd7 (21...Rd8 22.Rb7+–) 1–0. mrkt – kiki74, zagraj.pl, 2006.

3.Nf3 e5 4.Ne5+/– Qf6 5.Bb2 Bc5 6.d4 Bb4 7.Nd2 d6 8.c3 de5 9.cb4 ed4 10.Ne4 c5?? (10...Qd8 11.Bd4 Nf6 12.Nf6 gf6+–) 11.Nf6 (11.Nf6 Nf6 12.bc5 bc5 13.e3+–) 1–0. Janek – ariel, internet, 2016.

3.Nf3 e6 4.Bb2 c6 (4...Bb7 5.e3=) 5.a4 (better is 5.e4+=) 5...Be7?? (better is 5...Nf6=) 6.Bg7+– Bf6 7.Bh8 Bh8 8.c3 (8.d4 Nf6+–) 8...Nf6 (8...Bb7 9.e3+–) 9.e3 Ra7 10.Be2 d5 11.Ne5 (11.d4 c5+–) 11...Bb7 12.Na3 (12.0–0 Ne4 13.f4 Bg7+–) 12...Ne4 13.Nc6 Nc6 14.bc6 Bc6 15.Nb5 Rb7 16.Rc1 Kf8 17.Bd3 (17.d4 Rd7+–) 17...Qh4 The mate threat is Qxf2 18.g3 Qh6 19.Nd4 Be8 (19...Bd7 20.Rb1+–) 20.Bb5 (20.Rb1 e5 21.Nb5 Bd7+–) 20...Bb5 (20...Nc5 21.0–0+–) 21.Nb5 Be5 22.0–0 Nf6 23.f4 Bb8 24.Qf3 White prepares f5 24...Rd7 25.d3 Qg6 26.Qe2 Kg8 27.Nd4 Bd6 28.f5 ef5 29.Nf5 Bf8 30.Rf4 Kh8 31.Nh4 Qg5 32.Qf3 Be7 33.Rf1 Rd6 34.Nf5 Rd7 1–0. Engles,Michael – Lazar,Ferenc, WCCF, 2003.

3.Nf3 g6 4.Nc3 (4.Bb2 Nf6+= A) 5.d4 d5 (5...Bg7 6.e3 d5 7.Bd3 a4 8.Qe2 c5+=; 5...c6 6.e3 Bg7 7.Bd3 d5 8.Na3 0–0+=) 6.e3 Bg7 7.c4 c6 8.Nc3 0–0+=; B) 5.e3 Bg7 (5...d5 6.c4 Bg7 7.cd5 Qd5 8.Nc3 Qf5+=) 6.Be2 0–0 7.0–0 Bb7 8.c4 c5+= 0.58; 4.e4 Bg7 (4...d5 5.ed5 Bg7 6.d4 Qd5 7.c4 Qd6 8.Ba3 Qd8+/–) 5.d4 d6 6.Bd3 Nf6 7.0–0 0–0 8.Re1 c5+/–) 4...Bg7 (4...d5 A) 5.e3 Bg7 (5...Nf6 6.Be2 Bg7 7.0–0 0–0 8.Re1 Qd6=) 6.Bb2 Bb7 7.d4 Nf6 8.Bd3 0–0=; B) 5.d4 Nf6 6.g3 Ne4 7.Ne4 de4 8.Ng5 f5=) 5.Bb2 (5.e4 d5 6.ed5 Bb7 (6...Nf6+= 7.Bc4 Bb7 8.d4 Nd5+/–) 7.d4 Nf6 8.Bc4 Nd5+/–) 5...c6 (5...d5 6.e3+= Bb7 7.a4 Nh6 8.d4 c5+=; 5...Nf6 6.Nd5 0–0 7.Nf6 ef6 8.e3 c5+=) 6.e4+/– (6.e3 Nh6 7.h4 Bb7 8.h5 Nf5+/–) 6...cb5 (6...Nf6 7.Bd3+= Nh5 8.0–0 Nf4+=) 7.Bb5 a4 (7...Nf6!? 8.Rb1 (8.e5 Ng4+/–) 8...Bb7+/–) 8.0–0+– (8.Na4 Bb2+– 1.45) 8...a3 9.Bc1 Nh6 10.d4 Na6 (10...Nc6 11.Rb1+–) 11.Bc4 (worse is 11.Ba3 Nc7 12.Bb4 Nb5 13.Nb5 0–0+/–) 11...e6 (11...0–0 12.Rb1+–) 12.Rb1 (better is 12.Ba3 Bf8 13.Qc1 Ba3 14.Qa3+– (14.Qh6?! Bb7+–)) 12...b5? (12...0–0+–) 13.Nb5 (worse is 13.Bb5 Nc7+–) 13...Bb7 (13...0–0 14.Ba3 d5+–) 14.Nd6 (14.Nd6 Kf8 15.Nb7+–) 1–0. pierre – stfizt, internet, 2010.

3.h4 Bb7 4.h5 h6 5.a4 e5 6.Bb2 d6 7.Nf3 Be7 8.d4 ed4 9.Nd4 Bf6 10.Nd2= Ne7 11.e4 Nd7 12.Bd3 Nc5 13.Qe2 0–0 14.0–0 c6 15.bc6 Nc6 16.Nc6 Bc6=+ 17.Bf6 Qf6 18.Bb5 Bb7 19.Rfe1= Qh4 20.Ra3 Rac8 21.Rg3 Qf6 22.e5 de5=+ 23.Qe5 Qe5 24.Re5 Rfd8 25.Nc4 Ne6 26.Ne3 Rd2 27.Bc4= Nf4 28.Re7+/– Bd5 29.Bd5 Nd5 30.Rd7 Rc5 31.c4 Ne3 32.Rd2 Nc4 33.Rd8 Kh7 34.Rc3 Nb2 35.Rc5+– bc5 36.Ra8 c4 37.Ra5 c3 38.Rc5 Na4 39.Rc4 Nb6 40.Rc3 Nd5 41.Rf3 Nf6 42.Rf5 Kg8 43.f3 (43...Kf8 44.Re5+–) 1–0. Dana9 (2590) – Xpander (2525), ICC, 2002.

3.h4 d5 4.h5 f5 5.Nf3 h6 6.Bb2 e6 7.e3 a4 8.Ne5 a3 9.Bd4 Qd6? (9...Bd6 10.Ng6) 10.Ng6 Rh7 11.Be5 Qd8 12.Nf8 Kf8 13.Qf3 Ra7 14.d4 Qe7 15.g4 Qb4 16.Nd2 Qb2 17.Nb3 Qc2 18.gf5 Qc3 19.Kd1 Ke7 20.fe6 Be6 21.Rc1 Qb4 22.Bd3 Nd7 23.Bh7 Ne5 24.Qg3 Bg4 25.Kc2 Qb5 26.Qe5 Kf7 27.Bg6 Kf8 28.Qf4 Nf6 29.f3 Qe2 30.Nd2 Be6 31.Bd3 Qg2 32.Rcg1 Qf2 33.Rf1 Qg2 34.Rhg1 Qh3 35.Qe5 Bg8 36.Rg7 Kg7 37.Rg1 Kf8 38.Qf6 Bf7 39.Qd8 Be8 40.Rg8 Kg8 41.Qe8 Kg7 42.Qe7 Kg8 43.Bh7 1–0. Wall,Bill – Marishka, FICS, 2012.

3.h4 Nf6 4.Nf3 e6 5.h5 Nd5 6.e4 Nf4? 7.g3+– Nh5 8.Rh5 g6 9.Bb2 f6 10.Rh1 Bb4 11.e5 f5 12.a3 Bc5 13.d4 Be7 14.d5 Bb7 15.Nc3 c6 16.bc6 Ba6 17.d6 Bf8 18.c7 Qc8 19.Ng5 h6 20.Nd5 h5 21.Nf6# 1–0. pierre (2005) – jordan2delta, internet, 2006.

3.a4 Bb7

4.Bb2 c5 5.c4 d5 6.e3 Nf6 7.Nf3 Nbd7 8.Be2 g6 (8...dc4 9.Bc4 e6 10.0–0=) 9.0–0 Bg7 10.d4 0–0 11.h3 Ne4 12.Nbd2 e5 (12...Nd2!? 13.Nd2 Rc8=) 13.Ne4+= de4 14.Ne5 cd4 (14...Ne5!? 15.de5 Qc7+=) 15.ed4 (15.Nd7!? Qd7 16.Bd4+/–) 15...Ne5+= 16.de5 Qe7 (better is 16...Qc7+=) 17.Qd6?? (better is 17.Qd4 Qc7 18.Rad1+/–) 17...Qd6–+ 18.ed6 Bb2 19.Rad1 Ba3 20.d7 Rad8 21.f3 Bc5 22.Kh1 e3 23.f4 f5 24.Rd3 Be4 25.Rdd1 Rf7 26.Bf3 Bf3 27.Rf3 Rfd7 28.Rd7 Rd7 (28...Rd7 29.Re3 Be3–+) 0–1. lousse (1710) – maniankaq1 (1710), kurnik, 2011.

4.Bb2 c5 5.e3 d5 6.Nf3 Nd7 7.Be2 Qc7 8.0–0 e5 9.d4 e4 10.Ng5 h6 11.Nf7 (better is 11.Nh3=) 11...Kf7–+ 12.Bh5 g6 (better is 12...Ke7–+) 13.Bg6? (better is 13.dc5 Ngf6 14.cb6 Qb6 15.Bg4–/+) 13...Kg6–+ 14.Qg4 Kh7 (better is 14...Kf7!? 15.Qh5 Ke7 16.Qh4 Ngf6 17.dc5 bc5 18.c4–+) 15.Qf5 Kg7 16.dc5 Ngf6 17.h4?? bc5 18.h5 Be7 19.f3 Rag8 20.fe4 de4 21.Nd2 Kf7 22.Ne4 Be4 23.Qe4 Rg5 24.Qc4 Ke8 25.Bf6 Nf6 26.Rf6 Bf6 27.Qe6 Be7 28.Rf1 Rf8 29.Rf8 Kf8 30.Qh6 Ke8 31.Qh8 Kd7 32.h6 Qe5 33.Qa8 Qe3 34.Kf1 Rf5 35.Qf3 Rf3 36.gf3 Qf3 37.Ke1 Qh1 38.Ke2 Qh6 39.c4 Qe6 40.Kd3 Bd8 41.Kc3 Qe3 42.Kb2 Bb6 43.Kc2 Kd6 44.Kb2 Ke5 45.Kc2 Kd4 46.Kb2 Kc4 47.Ka2 Kb4 48.Kb2 Qc3 49.Ka2 c4 50.Kb1 Bd4 51.Ka2 Qb2# (51...Qc2#) 0–1. aleksandras19 – hemajur42, kurnik, 2012.

4.Bb2 c5 5.e3 d5 6.Nf3 e6 7.c4 Nf6 8.Be2 Be7 9.0–0 0–0 10.d4 Nbd7 11.Nbd2 Rc8 12.Rc1 cd4 13.Bd4 Nc5 14.Ne5 Bd6 15.Ndf3 dc4 16.Nc4 Bd5 (16...Be7 17.Nfe5=) 17.Nfe5 (17.Bf6 gf6 18.Nd6 Qd6+=) 17...Be5 (17...Be7 18.Bf3=) 18.Be5 Bc4 (18...Nfe4 19.Bf3+=) 19.Rc4 Qd1 20.Rd1 Nfd7 21.Bd6 Rfd8 22.h3 ½–½. Van Esbroeck,Dirk – Wartig,Wolfgang, corr SOK–92–88, 1992.

4.Bb2 c5 5.e3 e6 6.Nf3 d5 7.Be2 Nf6 8.0–0 g6 9.Na3 Bg7 10.c4 0–0 11.d4 dc4 12.Nc4 Nbd7 13.Qc2 Nd5 14.Rad1 Nb4 15.Qb1 Rc8 16.dc5 Rc5 17.Bg7 Kg7 18.Qb2 Kg8 19.Nce5 Rd5 20.Nc6 Bc6 21.bc6 Nc6 22.Bb5 Nb4 23.Nd4 Qf6 24.Qc1 Nc5 25.Nc6 Na2 26.Qc2 Nc3 27.Rd5 Nd5 28.Re1 Rc8 29.Nd4 Qd8 30.Nc6 Qd6 31.Rd1 Rc6 32.Bc6 Qc6 33.e4 Nf4 34.Rd8 Kg7 35.Qc3 f6 36.f3 Ne2 37.Kf2 Nc3 38.Rd2 N5e4 39.fe4 Ne4 40.Ke3 Nd2 41.Kd2 Qc4 42.Ke3 e5 43.g3 f5 44.h3 Qd4 45.Kf3 Qd3 46.Kg2 e4 47.h4 Qf3 48.Kh2 e3 49.h5 e2 50.hg6 e1R 51.g4 Rh1 0–1. ateistawolnyx – fakazer, kurnik, 2012.

4.Bb2 d5 5.e3 Nd7 6.Nf3 e6 7.c4 Ngf6 8.Be2 (8.Nc3 Bd6=) 8...Be7 (8...dc4 9.Bc4 Be7 10.0–0=) 9.0–0 0–0 10.d4 Rc8 (10...dc4 11.Bc4 Rc8 12.Nc3=) 11.Nbd2 (11.Ba3 dc4 12.Bc4 c5=) 11...c6 12.Qb3 c5 13.Rac1 (13.Rad1 cd4 14.Bd4 Nc5=) 13...cd4 14.ed4 (14.Bd4 Nc5 15.Qd1 Nfe4=) 14...Re8 15.Rfe1 Ba8 (15...dc4 16.Nc4 Nd5 17.Nce5=) 16.Bd3 (16.Ba3 Ba3 17.Qa3 dc4 18.Nc4 Bd5=) 16...Bb7 (16...dc4 17.Rc4 Rc4 18.Qc4+=) 17.Ne5= Ne5 (17...dc4 18.Ndc4 Bd5 19.Ba3=) 18.de5 Nd7 (18...dc4 19.Nc4 Qd5 20.Bf1+/–) 19.Bd4 (19.Qc2 h6+=) 19...Nc5= 20.Bc5 (20.Qc2 Nd3 21.Qd3 Bb4=) 20...Bc5+= (worse is 20...bc5 21.Qc2+=) 21.Nf3 dc4 22.Bc4 (worse is 22.Rc4 Bd5–/+) 22...Qe7 23.Red1 h6 (23...Red8 24.Rd8 Rd8 25.Rd1+=) 24.Rd2 Red8 25.Rcd1 Rd2 26.Rd2 Bf3 27.Qf3 Bf2 28.Qf2 (28.Rf2 Rc4) 28...Rc4 29.Qb6 (29.Rd1!?+=) 29...Rc1–/+ 30.Kf2 Qh4 31.Ke3 Rc3 (31...Qg5 32.Kd3 Qf5 33.Kd4 Qf4 34.Kd3 Qc4 35.Ke3 Qc3 36.Ke2 Qe5 37.Qe3 Re1 38.Ke1 Qe3 39.Kd1–+) 32.Ke2–/+ Qe4 33.Kf2 Qf4 34.Ke2 Qe5 35.Kf2 (35.Kd1!? Qh5 36.Re2 Rd3 37.Ke1 Qh4 38.g3 Qa4 39.Kf2–+) 35...Qh2 (35...Qh2 36.Qd4 Rc8–+) 0–1. Van Esbroeck,Dirk – Hasler,Ulrich, CiF, 1991.

4.Bb2 d5 5.e3 Nd7 6.Nf3 Ngf6 7.Be2 e6 8.c4 g6 9.Nc3 Bg7 10.Rb1 0–0 11.0–0 Nc5 12.d4 Ncd7 13.Ba3 Re8 14.c5 bc5 15.dc5 c6 16.b6 Bf8 17.Qd4 e5 18.Ne5? (better is 18.Qd2+=) 18...Ne5 19.f4 Ned7 20.f5 Qe7 21.fg6 hg6 22.Nd1 Qe5 23.Qh4?! Bg7 24.Bb2? Qe7 25.Bg4 Ng4 26.Qg4 Bb2 27.Rb2 Nc5 28.Rbf2 Rf8 29.h4 Ne4 30.Rf4 Nd6 31.h5 Qe6 32.Rf6 Qg4 33.hg6 fg6 34.Rf8 Rf8 35.Rf8 Kf8 36.Nf2 Qe2 37.Nh3 Qe3 38.Kh2 Nf5 (38...Nf5 39.Kh1 Qe1 40.Kh2 Qg3 41.Kh1 Ne3 42.Nf4 Qf4 43.g4 Qe4 44.Kg1 Qg2#) 0–1. elektrooon – fakazer, kurnik, 2012.

4.Bb2 d5 5.Nf3+= e6 6.e3 c5 (6...Nf6 7.Bd4=) 7.bc6+= Nc6 8.Bb5 Rc8 9.0–0 Nf6 10.d3 (10.Nc3 Bd6+=) 10...Bd6= 11.Ne5 Qc7 12.f4 0–0 (12...Bc5 13.Bd4=) 13.Nc6 Bc6 14.Bf6 gf6 15.Bc6 Qc6 16.Ra2 Kh8 17.Qh5 f5 (18.Rb2 Bb4=). Kross – Wartig,Wolfgang, corr SOK–89–48, 1989.

4.Bb2 d6 5.Nc3 e5 (5...Nf6 6.Nf3=) 6.e4 (6.Nf3 Nd7=) 6...g6 (6...Nf6 7.Nf3=) 7.d3 (7.Nf3!?+=) 7...Bg7 8.Nf3 Ne7 (8...Nf6 9.g3+=) 9.Be2 0–0 10.0–0 Nd7 11.Rb1 (11.d4 d5 12.ed5 Re8=) 11...f5 (11...Nc5 12.h3+=) 12.Nd2 Nf6 (12...Nc5!?+=) 13.Bf3+= Kh8 (13...fe4 14.de4 Nd7 15.Qe2+=) 14.Re1 Qd7 15.ef5 (15.Nc4 Kg8+=) 15...Bf3= 16.Qf3 Nf5 17.Nde4 (17.Qh3 Qf7 18.Nf3 h6=) 17...Nd4 (17...Nh5 18.Qg4 Nf4 19.Kh1–/+) 18.Qd1 Qf5 (better is 18...d5 19.Nf6 Bf6=) 19.Ne2?? (better is 19.Qd2=) 19...Ne4–+ 20.de4 Qf2 21.Kh1 Ne6 22.Rf1 Qf1 (22...Qe3 23.Ng3–+) 23.Qf1 Rf1 24.Rf1 Kg8 25.g3 (25.Bc1 c6! 26.Nc3 cb5 27.Nb5 Rc8–/+) 25...Nc5 (25...Bh6 26.Nc3–/+) 26.Nc3 Bh6 27.Ba3 Ne6 28.Nd5 Rf8 29.Rf8 Bf8 (29...Kf8? 30.Nc7 Kf7 31.Nd5+–; worse is 29...Nf8 30.Nc7 Nd7 31.Bd6+/–) 30.Kg2 Kf7 31.h4 (31.Bc1 Nc5–/+) 31...Bh6 32.c3 g5 33.hg5 (33.Kf3 gh4 34.gh4 Bf4–/+) 33...Bg5–+ 34.Kf3 Bd8 (34...Kg6–+) 35.Kg4 (35.Ke2!?–/+) 35...Kg6–+ 36.Ne3? (36.Kf3–+) 36...Ng5 37.Nd5 Ne4 (37...h5 38.Kh4–+) 38.Bc1 (38.Kf3 Ng5 39.Ke2 Kh5–+) 38...Nc5 39.Bd2 (39.Ba3 Na4 40.Kf3 Nc5–+) 39...Na4 40.Kf3 h5 41.Be1 (41.Bc1 Nc5–+) 41...Nc5 42.Bd2 (42.c4 e4 43.Ke2 a4–+) 42...a4 43.Bc1 (43.Nb4 e4 44.Ke2 Nb3–+) 43...Nb3 44.Bb2 Kf5 45.Ne3 (45.Ke2 Ke4 46.Nb4 d5–+) 45...Ke6 46.c4 (46.Ke2 Bg5 47.Nd1 Kd5–+) 46...h4 (better is 46...Bg5 47.Kf2 Na5 48.Nc2 Nc4 49.Bc3–+) 47.gh4 Bh4 48.Ke2 Bg5 49.Nd5 Kd7 (49...Nd2 50.Nc7 Kd7 51.Nd5 Nc4 52.Bc3–+) 50.Kd1 (50.Nc3 Nd2 51.Kd3 Ke6–+) 50...Na5 51.Nc3 (51.c5 bc5 52.Nc3 Nc4 53.Na4 Nb2 54.Nb2 d5–+) 51...Nc4 52.Na4 d5 53.Bc3 (53.Ke2 d4–+) 53...Ke6 54.Be1 (54.Nb2 Nd6–+) 54...d4 55.Kc2 (55.Bg3 Nd6–+) 55...Nd6 0–1. mic (2105) – gtan (2130), net–chess.com, 2007.

4.Bb2 d6 5.c4 e5 (5...Nf6 6.Nf3+=) 6.Nc3 (6.Nf3 Nf6=) 6...Nf6 7.d3 (7.Nf3 Nbd7=) 7...Nbd7 8.e4 (8.Nf3 h5=) 8...g6 (8...Be7 9.Nf3+=) 9.Be2 Bg7 10.Nf3 0–0 11.h3 c6 (11...Nc5 12.0–0=) 12.Ba3 (12.0–0 Nc5=) 12...cb5 13.Bd6 (better is 13.Nb5 Nc5 14.0–0=) 13...Re8 (better is 13...bc4!? 14.Bf8 Qf8+=) 14.Nb5+/– Rc8 15.Ba3 (15.0–0 Nh5+=) 15...Nc5+= 16.0–0 (16.Rb1 Nh5+=) 16...Nh5 17.Nh2 (17.g3!?+=) 17...Nf4= The pressure on the backward pawn d3 grows 18.Bc5 Rc5 (18...bc5 19.Nf3=) 19.Ng4 (better is 19.Nf3!?=) 19...f5–/+ 20.Ne3 fe4 21.de4 Qg5 (better is 21...Be4!? 22.Ra2 Bc6–/+) 22.Kh2= Rd8 23.Qe1? (better is 23.Qc2=) 23...Be4–+ 24.Rg1 Bb7 (better is 24...Ne2 25.Qe2 Bd3–+) 25.Bf3?? (better is 25.Rd1–/+) 25...e4–+ 26.Bg4 Qe5 (better is 26...h5 27.Rd1 hg4 28.Ng4 Nd3–+) 27.g3 Nd3 (better is 27...Qa1 28.Qa1 Ba1 29.Ra1–+) 28.Qf1? (better is 28.Qd2–+) 28...Qa1 (28...h5 29.Be2 Qa1 30.Qa1 Ba1 31.Ra1 Nf2 32.Nc3–+) 29.Qa1 (29.Be6 Kf8 30.Qa1 Ba1 31.Ra1 Nf2–+) 29...Ba1 30.Ra1 Nf2 (30...Rf8 31.Nd4–+) 31.Be6 Kg7 (better is 31...Kf8 32.Bd5 Bd5 (32...Rcd5?! 33.cd5 Nd3 34.Nc3–/+; 32...Rdd5?! 33.cd5 Nd3 34.Rf1 Kg8 35.Rf6–/+) 33.cd5 Ke7–+) 32.Ra2 (32.Bd5 Bd5 33.cd5–+) 32...Nd1 33.Nd5 (33.Nd1 Rd1 34.Bg4 Rc1–+) 33...Bd5 (33...e3!? 34.Na3–+) 34.Bd5 (34.cd5 Kf6–+) 34...e3 (34...Rb5!? 35.ab5 Nc3 36.Rc2 Nd5 37.cd5 Rd5 38.Rc7 Kf8 39.Rc8 Kf7 40.Rc7 Kg8 41.Rc8 Kf7 42.Rc7 Ke6 43.Rc6 Rd6 44.Rc7–+) 35.Re2 Rcd5 (better is 35...Rf8 36.Re1 Rf2 37.Kg1–+) 36.cd5 Rd5 (36...Rd5 37.Kg2 Kf6–+) 0–1. mic (2250) – gtan (2310), net–chess.com, 2008.

4.Bb2 d6 5.e3 Nd7 6.Nf3 e6 7.Be2 Qe7 8.0–0 0–0–0 9.Nd4 h5 10.Bf3 d5 11.c4 g5 12.cd5 ed5 13.Nc6 Bc6 14.bc6 Ne5 15.Be2 Nc6 16.Bh8 f6 17.Qc2 Kb7 18.Bb5 Rd6 19.Nc3 Nb4 20.Qb3 Nh6 21.Be2 Nf7 22.Bf3 c6 23.Bf6 Rf6 24.Bh5 Nd6 25.Ne2 Rh6 26.Bg4 Qe4 27.h3 Nc4 28.Ng3 Qg6 29.Qc3 Bg7 30.d4 Rh8 31.Nf5 Bf8 32.e4 Qe8 33.ed5 cd5 34.Rfe1 Qc6 35.Qc1 1–0. avinoam – polpo, kurnik, 2012.

4.Bb2 d6 5.e3 e5 6.Nf3 f5 7.c4 g6 8.d4 e4 9.Nfd2 Bg7 10.Nb3 Nf6 11.Nc3 Nbd7 12.d5 Ne5 13.f4 (better is 13.Nd4!?+=) 13...ef3+= 14.gf3 0–0 15.f4? (15.Nd4 Nfd7 16.Qd2 Nc5+=) 15...Ned7 16.Qd4?? (16.Nd4 Re8 17.Qf3 Qe7–/+) 16...Re8 (better is 16...Nd5 17.Qg7 Kg7 18.cd5 Qe7–+) 17.Kd2?? (better is 17.Qd2–/+) 17...Ne4–+ 18.Kc2 Bd4 19.Nd4 Nc3 20.Bc3 Re3 21.Ne6 Qc8 22.Bd3 Nf8 23.Ng5 Qd7 24.Bd4 Re7 25.Rae1 Rae8 26.Reg1 Re4! 27.Bc3 Rf4 28.Bd2 Rf2 29.h4 h5 30.Nh3 Rd2! 31.Kd2 Re5 32.Nf4 Kh7 33.Rg5 Qe7 34.Rhg1 Re3 35.Nh5?? gh5 36.Rh5 1–0. dtpwaldi – maistortsche (1700), kurnik, 2011.

4.Bb2 d6 5.Nf3 e5 (5...Nf6 6.Nc3=) 6.d3 (6.g3 Nf6=) 6...Nf6= 7.e4 (7.g3 Nbd7=) 7...g6 8.Be2 (8.Nbd2 Nbd7=) 8...Bg7 9.0–0 (9.Nbd2 Nbd7=) 9...0–0 10.Nbd2 (10.Na3 Re8=) 10...Nbd7 11.h3 (11.Nc4 Re8=) 11...Nh5 (11...Nc5 12.Re1+=) 12.Kh2 (12.g3 Nc5=) 12...Nf4 13.g3 Ne6 (13...Ne2 14.Qe2 Nc5 15.Bc3+=) 14.Rg1 (14.Nb3 d5 15.Nfd2 de4 16.Ne4 f5–/+) 14...f5–/+ 15.ef5 (15.Re1–/+) 15...gf5 (better is 15...Rf5!? 16.Rf1 Ndc5–/+) 16.Nh4 (16.Nb3 Qf6+=) 16...f4 (16...Ndc5 17.Nb3+=) 17.Bg4= fg3 18.fg3 Nec5 (18...Rf2 19.Rg2 Rg2 20.Ng2=) 19.Qe2= Nf6 (19...Rf7 20.Ne4=) 20.Bf3 (20.Nf5!?+=) 20...Bf3= 21.Nhf3 Qe8 22.Ne4 (22.Rgf1 Qh5 23.Ne4 Nce4 24.de4 d5=) 22...Nce4 (22...Nfe4!? 23.de4 Qg6–/+) 23.de4= Kh8 (23...Qg6 24.Nd2=) 24.Raf1 (better is 24.Nh4!?+=) 24...Qg6+= The isolani on e4 becomes a target 25.Nh4 (better is 25.Qd3!? Qe4 26.Ne5 de5 27.Rf6 Qd3 28.Rf8 (28.cd3?? Rf6 29.Rg2 Rf3–+) 28...Rf8 29.cd3+=) 25...Qe4–+ 26.Qe4 (26.Rf2 Qa4 27.Rf3 Ne4–+) 26...Ne4 27.Nf5 Bf6 (27...Nc5!? 28.Ng7 Kg7–+) 28.Rg2 (28.g4!?–/+) 28...Nc5–+ 0–1. carrafurca (2310) – gtan (2360), net–chess.com, 2008.

4.c3 d5 5.Bb2 (5.Nf3 Nf6=) 5...Nf6 (5...e5 6.Nf3+=) 6.d4 (6.Nf3 e6=) 6...e6 7.e3 Nbd7 (7...c5 8.Nf3=) 8.Nf3 Be7 9.Bd3 Rc8 10.Nbd2 c5 11.0–0 c4 (11...Bd6 12.Ba3=) 12.Bc2 0–0 13.Qe2 g6 (13...Re8 14.Rfe1=) 14.Rfe1 Re8 15.e4 Bf8 (15...de4 16.Ne4 Ne4 17.Be4=) 16.e5+= Nh5 17.Nf1 Ng7 (17...Bh6 18.Ne3+=) 18.Bc1 Be7 19.Ne3 Nf8 20.Ng4 f5?? (better is 20...Nf5+/–) 21.ef6! Bf6 (21...Bf6 22.Nh6 Combination) 22.Nge5 (better is 22.Nh6 Kh8 23.Nf7 Kg8 24.Nd8 Rcd8 25.Ne5+–) 22...Be5 (22...Nd7 23.Nd7 Qd7 24.Bf4+/–) 23.Ne5 Qf6 (23...Nd7 24.Qg4+/–) 24.Qf3 (24.Ng4 Qe7 25.Ba3 Qg5+–) 24...Nf5? (24...Qf3 25.Nf3 (25.gf3?! Rc7+=) 25...Nd7 26.Ba3+–) 25.Bf5?? (better is 25.g4+–) 25...Qf5 (25...ef5 26.Qg3+/–) 26.Qf5 (26.Bf4!? g5 27.Bg5 Qf3 28.Nf3+– (worse is 28.gf3 Rc7+/–)) 26...ef5+/– 27.Bf4 (27.Ba3 Rcd8+=) 27...Rcd8 28.Bg5 Rc8 29.f4 Kg7 30.Bh4 h6 31.Bf2 (31.Re3 Re6+=) 31...Red8 (31...Ne6 32.Bg3=) 32.g3 (32.Re2 Rc7+=) 32...Nd7 (32...Re8!?+=) 33.Nd7+/– Rd7 34.Re5 (34.Re6 Rf8+/–) 34...Rcd8 (34...Rf8 35.Rae1+=) 35.Rae1 (35.Re6 Rf8+/–) 35...Kf7 0–1. Fournier,Frederic – Guest2961385, Partie amicale, 1m + 0s, 2008.

4.Nc3 e5 (4...Nf6 5.Nf3=) 5.e4 (5.Nf3 e4 6.Nd4 Nf6=) 5...d6 (5...Nf6 6.Nf3=) 6.Bb2 (6.Bc4!?+=) 6...Nf6= 7.d3 (7.Nf3 Ne4 8.Ne4 Be4+=) 7...g6 (7...Nbd7 8.Nf3+=) 8.Be2 Bg7 (8...Nbd7 9.h4+=) 9.Nf3 (9.h4 Nbd7=) 9...0–0+= 10.0–0 Nbd7 11.Ba3 (11.Nd2 Nc5+=) 11...Ne8 (11...Nc5 12.Qd2+=) 12.Rc1 (12.Qb1 Nc5=) 12...f5 (12...Qe7 13.Nd5 Bd5 14.ed5=) 13.ef5 (13.Qd2 Nc5+=) 13...gf5 (better is 13...Rf5 14.Nd2 Nef6=) 14.h3 (14.Qe1 Qf6 15.Nd1 e4+=) 14...Kh8 (better is 14...e4!? 15.d4 Kh8–/+) 15.Na2 (15.Qd2 Qf6 16.Nd1 Nc5+=) 15...Bh6+= 16.Rb1 (16.Ra1 Rg8+=) 16...Rg8 17.Bb2 (17.Kh1 Ng7 18.Bc1 Bc1 19.Rc1 Ne6–+) 17...Nef6 (17...Ng7 18.c4–/+) 18.Re1 (18.Nc3 Qe7 19.Nh4 Ne4 20.Ne4 Qh4–+ (20...fe4?! 21.Nf5 Qf8 22.Bg4=)) 18...Qf8 (18...Nh5 19.Kh2 Nf4–/+) 19.Bc1? (better is 19.Nh4=) 19...Bc1 20.Qc1?? (20.Rc1 Qh6 21.Nh4 Rg2 22.Ng2 Qh3 23.Bf1–+) 20...Qg7 21.g3 (21.Nh4 f4 22.Qd1 Qg5–+) 21...f4 22.Kf1 (22.Kh1 fg3 23.Rg1 Nh5 24.fg3 Ng3 25.Kh2 Ne2 26.Rg7 Nc1 (26...Kg7?! 27.Qe3 Nf4 28.Ng5=) 27.Rg8 Rg8 28.Rc1 Bf3–+) 22...fg3 23.fg3 (23.Qg5 Qf7 24.Qf5 Qa2 25.Ra1–+) 23...Qg3 0–1. mic (2195) – gtan (2280), net–chess.com, 2007.

4.c4 e5 5.Nc3 g6 (5...Nf6 6.Nf3=) 6.Bb2 d6 7.e4 Nd7 8.d4 (8.Nf3 Ngf6 9.Bd3 Nc5=) 8...Bg7 (8...ed4 9.Nd5 Bg7 10.Nf3–/+) 9.d5 (9.Nf3!?=) 9...Nc5 10.Nf3 Ne7 (10...Nf6 11.Bd3+=) 11.Be2= f5 12.Qc2 0–0 13.0–0–0 (better is 13.0–0!?=) 13...Qd7 14.Nd2 fe4 15.Nce4 Nd5?? (better is 15...Nf5–/+) 16.cd5+– Bd5 17.Nc5 bc5 18.f3 (18.Ne4!? Be4 19.Qe4 Rae8+–) 18...Qe6 19.Nc4 Kh8 (19...Rf7 20.Kb1+/–) 20.Rd5 (20.b6!? cb6 21.Rd5 Qd5 22.Nb6 Qb7 23.Na8 Ra8+–) 20...Qd5 21.Ne3?? (better is 21.Rd1 Qe6 22.Qe4+/–) 21...Bh6–+ 22.Qd2 Qb3 23.Bc4? (23.Bc3 Qa4 24.g3 Qa3 25.Kc2 Be3 26.Qe3 Qa4 27.Kc1+=) 23...Qe3–+ 24.Qe3 Be3 25.Kc2 Bd4 26.Bd4 (26.Bc1–+) 26...ed4 (worse is 26...cd4 27.Kd3–+) 27.Kd3 (27.h4 Rae8–+) 27...Rfe8 28.Bd5 (28.Rb1 Rad8 29.b6 cb6 30.Rb6 d5–+) 28...Re3 29.Kd2 Rae8 30.Be4 (30.g4 Kg7 31.h4 R8e5–+) 30...d5! 31.Bd5 Re2 32.Kd3 (32.Kc1 Rg2 33.f4–+) 32...R8e3 0–1. Baer,Cy (1895) – Cuttica,Gerardo Axel (2200), CiF, 2007.

4.c4 e6 5.Bb2 Nf6 6.e3 Be7 7.Nf3 0–0 8.Be2 d5 9.0–0 Nbd7 10.d4 dc4 11.Bc4 Bd5 (11...Rc8 12.Nc3=) 12.Bd3 (12.Bd5 Nd5 13.e4 Nb4+=) 12...Ne4 (12...c5 13.bc6 Bc6 14.Nc3=) 13.Nc3 Nc3 14.Bc3 Nf6 (14...c5 15.e4 Bb7 16.Qe2=) 15.Ne5 Ne4 16.Qc2 f5 17.Bb2 Ng5 (17...Bd6 18.f3 Be5 19.fe4 fe4 20.Rf8 (worse is 20.Be4 Bh2 21.Kh2 Qh4 22.Kg1 Be4–/+) 20...Kf8 21.de5 ed3 22.Qd3=) 18.Rac1 (18.Nc6 Bc6 19.Qc6 Bd6+/–) 18...Bd6 19.f4 (19.f3 Be5 20.de5 Rc8+/–) 19...Ne4+= 20.h3 (20.Be2 Qh4+=) 20...Ng3 21.Rfd1 Rc8 22.Nc6 Qe8 23.Qf2 Ne4 24.Qc2 (24.Be4 fe4 25.Rf1 Bb3+=) 24...Nf6 25.Ne5 Be4 (25...Ne4 26.Bc4=) 26.Be4+= Ne4 27.d5 (27.Nc6 Qg6+=) 27...Nc5 28.de6 Qe6 29.Bd4 Nb3 (29...Rfe8 30.Qc4+=) 30.Qc4+= Qc4 31.Rc4 Nc5 (31...Rfe8 32.Kf2+/–) 32.g4 Rb8 33.Bc5 Bc5 34.Rd3 (34.Kf2 fg4 35.hg4 Rbd8 36.Rd8 Rd8+/–) 34...Rbd8 35.Rcc3 (35.Kf2 Rd6+/–) 35...Rd3 36.Rd3 Bd6 (36...fg4 37.Nd7 Rf5 38.Nc5 Rc5 39.hg4+=) 37.Nc4+/– Rd8 (better is 37...Bc5!? 38.gf5 Rf5+/–) 38.gf5+– Be7 (38...Kf7 39.Kg2+–) 39.Rd8 Bd8 40.Kg2 Kf7 41.Kg3 Kf6 (41...Bf6 42.e4+–) 42.e4 Be7 43.Kg4 Bb4 (43...Bc5 44.e5 Kf7 45.Nd2+–) 44.Ne3 (44.Ne3 Ke7 45.Nd5 Kd6 46.f6 gf6 47.Nf6+–) 1–0. Rajala,Olavi – Pesch,K, corr ICCF, 1975.

4.c4 Nf6 5.Bb2 g6 (5...e6 6.Nc3+=) 6.Bf6 ef6 7.Nc3 Bg7 8.d4 0–0 9.e3 Re8 10.Nf3 f5 11.Be2 f4 12.0–0 fe3 13.fe3 d6 (13...Re3 14.Qd2 Bh6 15.Qb2+=) 14.Qd2= Bh6 15.Nd1 Nd7 16.Ra3 Nf6 17.d5 Ne4 18.Qe1 Qf6 19.Nd4 (19.Nd2!? Qe5 20.Ne4 Qe4 21.Qg3=) 19...Be3+= 20.Re3 (20.Re3 Qd4 Remove defender; 20.Ne3 Qd4 Remove defender) 20...Qd4 21.Rf4 g5 22.Rfe4? (better is 22.Rf5 Bc8 23.Rf1–/+) 22...Re4–+ 23.Qg3 (23.Bd3 Re5 24.Qd2–+) 23...Rae8 24.Kf2 h6 25.Qh3 (25.Bh5 Qc4 26.h4 Qd5 27.hg5 Qg5 28.Qg5 hg5–+) 25...Bc8 (better is 25...Re3 26.Ne3 f5 27.Ke1 Qe3 28.Qe3 Re3 29.Kd2–+) 26.Qh6 Rf4 (26...Re3?! 27.Qg5 Kf8 28.Qh6 Ke7 29.Qe3 Qe5 30.Bd3+=) 27.Bf3 (27.Ke1 Re3 28.Qg5 Kf8 29.Qh6 Ke8 30.Qf4 Re2 31.Ke2 Qf4 32.Ne3–+) 27...Qd2 28.Kg3 (28.Kg1 Re3 29.Qg5 Kf8 30.Qh6 Ke7 31.Qg5 f6 32.Qg7 Kd8 33.Ne3 Qe3 34.Kf1 Rf3 35.gf3 Bh3 36.Qg2 Qf3 37.Ke1 Bg2 38.Kd2 Qf2 39.Kd3 Qe1 40.Kc2 Be4 41.Kb2 Qb4 42.Ka2 Qd2 43.Ka1 Qc2 44.c5 Qb1) 28...Rg4! (28...Re3?! 29.Qg5 Kf8 30.Ne3=) 29.Bg4 (29.Kh3 Re3 30.Qg5 Rg5 31.Kh4 Ree5 32.h3 Qe1 33.Nf2 Qf2 34.g3 Qg3) 29...Re3 30.Ne3 (30.Bf3 Re2 31.Qh7 Kh7 32.Be4 Re4 33.c5 Qf4) 30...Qe3 31.Bf3 Qe1 0–1. Baer,Cy (1895) – Gnuechtel,Andreas (2245), CiF, 2007.

4.d4 Nf6 5.c4 (5.Ba3 g6+=) 5...e6 6.Bg5 (6.Nc3!?+=) 6...Bb4–/+ 7.Bd2 Ne4 8.Bb4 ab4 9.Nf3 c5 10.d5? (better is 10.Nbd2 Nc3 11.Qb3–/+) 10...ed5–+ 11.e3 (11.cd5 Qf6 12.Ra2 Qd6–+) 11...Qf6 12.Nbd2 0–0 (12...Nc3 13.Qc1–+) 13.Ne4 de4 14.Nd2 d5 15.Be2 d4 16.0–0 Nd7 17.f4 (17.a5 ba5 18.ed4 cd4–+) 17...Qe6 (17...de3?! 18.Nb3 Rfd8 19.Qc1–/+) 18.ed4 (18.Qc1 d3 (18...de3?! 19.Nb3–/+) 19.Bd1 Ra7–+) 18...cd4 19.f5 (19.Re1 Qd6 20.Nb3 d3–+) 19...Qe5 20.Nb3 (20.c5 Nc5 21.Nc4 Qf6 22.Nb6 Qb6 23.Qd4 Rfd8–+) 20...d3 21.Bg4 Nf6 22.Bh3 (22.a5 e3 23.Re1 d2 24.Nd2 Qb2–+) 22...Rfd8 23.Qd2 (23.c5 e3 24.c6–+) 23...e3 24.Qb4 (24.Rae1 e2 25.Rf4 Ne4 26.Re4 Qe4–+) 24...d2 25.Rab1 (25.Nd2 ed2 26.Qb3–+) 25...e2 26.Nd2 Qe3 0–1. Baer,Cy (1895) – Gnuechtel,Andreas (2245), CiF, 2007.

4.e3 d6 5.Nf3 e5 6.d3 Be7 7.c4 h6 8.Nbd2 Nd7 9.Nb3 Ngf6 10.e4 Nh7 11.Be2 0–0 12.0–0 f5 13.ef5 Rf5 14.Nfd2 Rf8 15.Bf3 Bf3 16.Nf3 Qe8 17.Be3 Qf7 18.Ne1 Ng5 19.Nd2 Ne6 20.Nb3 Qg6 21.Ra2 h5 22.f3 Nf4 23.g3 (better is 23.d4=) 23...Bg5 (23...h4 24.Bf4 ef4 25.g4+=) 24.Kh1?? (better is 24.gf4 Bf4 25.Kf2 Bh2 26.Rh1 Bg3 27.Ke2+/–) 24...Ne6 25.Bf2 Qf5 26.d4 Qh3 27.Ng2 Rf7 28.Be3 (28.Kg1 Raf8+=) 28...Raf8 (28...h4 29.Bg5 hg3 30.Ne3+=) 29.Raf2 (29.d5 Nec5 30.Nc5 Nc5 31.Bg5 Ne4+=) 29...Bf6 (better is 29...h4!? 30.g4 Be3 31.Ne3 Nf4–/+) 30.d5= Nd8 31.Qc2 g5 (31...h4 32.gh4 Bh4 33.Nh4 Qh4 34.Qe4+=) 32.f4 (better is 32.Nd2!?+=) 32...h4+= 33.gh4 (33.fg5? hg3 34.Nf4 ef4–+) 33...gf4 34.Rf3 Qg4 35.Nf4 Bg7 (35...ef4? 36.Rg1 Qg1 37.Bg1+–) 36.Rg1?? (better is 36.h3 Qf5 37.Nd3 Qf3 38.Rf3 Rf3 39.Bg5–/+) 36...Qf3–+ 37.Ng2 Nf6 38.Nd2 (38.Re1 Ng4 39.Bg1 Qh3–+) 38...Qh5 (38...Qh3 39.Ne4 Ng4 40.Nf4 Qe3 41.Rg4 Rf4 42.Rf4 Rf4 43.Ng3–+) 39.h3 Qh7 (39...Kh8 40.Qd1–+) 40.Qd1 (40.Qh7 Kh7 41.Kh2 Bh6–+) 40...Nh5 41.Qg4 Qf5 (41...Kh8 42.Bg5–+) 42.Bg5 Qg4 (42...Nb7 43.Kh2 Qh7 44.Ne4–+) 43.hg4 Ng3 44.Kh2 Ne2 45.Re1 Nd4 46.Kg3 (46.Bd8 Rd8 47.Re3 Rf2–+) 46...Nb7 47.h5 Nf3 48.Nf3 Rf3 (48...Rf3 49.Kh4 Nc5–+) 0–1. Satka,Martin – Heinze,Johannes, Brandenburg–ch Seniors, 2004.

4.e3 e5 5.Bb2 d6 (5...e4 6.Nh3=) 6.Nf3 Ne7 (6...Ne7 7.Nc3 Nd7=; 6...Nd7 7.Be2=). jlepok (1885) – Strjuk (1970), internet, 2007.

4.e3 e6 5.Bb2 (--> 4.Bb2 e6 5.e3).

4.e3 e6 5.Nf3 Nf6 6.Bb2 Be7 7.g3 d6 8.Bg2 Nbd7 9.0–0 0–0 10.c4 d5 11.d3 Nc5 12.Ne5 Bd6 13.Nc6 Bc6 14.bc6 Na6 15.cd5 Nd5 16.Bd5 ed5 17.Qf3 Be7 18.d4 Nb4 19.Nc3 Nc6 20.Nd5 Bd6 21.Rac1 Ne7 22.Nc3 Qd7 23.Nb5 Rac8 24.Rc2 f5 25.Rfc1 f4 26.ef4 Rfe8 27.d5 Ng6 28.f5 Ne5 29.Qb3 Bc5 30.d6 Kh8 31.dc7 Qf5 32.Be5 Qh3 33.Qc3 Re5 34.Qe5 1–0. rryy44 – honzina222, kurnik, 2012.

4.e3 Nf6 5.Bb2 =.

4.f3 e6 5.e4 (5.d4 f5=) 5...d5 (5...Be4!? 6.Bb2 Bg6–/+) 6.d3 Nf6 7.Bb2 Bb4 8.c3 Be7 9.e5 Nfd7 10.d4 0–0 11.f4 c5 12.Nf3 f6 13.Bd3 fe5 14.fe5 Bh4 15.g3 Be7 16.0–0 Rf3?? (better is 16...Qe8+=) 17.Qf3+– Nf8 18.Qf7 Kh8 19.Nd2 Nbd7 20.Rf2 Qe8 21.Raf1 cd4 22.cd4 Rc8 23.Qe8 Re8 24.Rc1 Rc8 25.Rc8 Bc8 26.Bc3 Kg8 27.Nf3 Ng6 28.Bg6 hg6 29.Ng5 Nf8?? 30.Nf7 Bb4 31.Bb4 ab4 32.Nd6 (32.Nd6 Bd7 33.Rb2+–) 1–0. short64 (1685) – 3mjack (1745), kurnik, 2012.

4.Nf3 d5 5.Bb2 e6 6.e3 Nd7 7.c4 Ngf6 8.Nc3 Bb4 9.Be2 0–0 10.0–0 c5 11.d4 dc4 12.Bc4 Rc8 13.Na2 cd4 14.Nb4 ab4 15.Bb3 de3 16.fe3 Nd5 17.Ne5 Ne5 18.Be5 Ne3 19.Qd8 Rfd8 20.Rf2 Rd3 21.Rb1 Ng4 22.Re2 Rcc3 23.Bc2 Re3 24.Re3 Ne3 25.Bd1 Nd1 26.Rd1 Bd5 27.Bc3 bc3 28.Rc1 Bb3 29.g3 c2 30.Kf2 f6 31.Ke3 Kf7 32.Kd4 Ba4 33.Kc4 Ke7 34.Kb4 Bb5 35.Kb5 e5 36.Rc2 Ke6 37.Kc4 g5 38.Kd3 f5 39.Ke3 Kd5 40.Rb2 f4 41.gf4 gf4 42.Kf3 Kc5 43.Ke4 b5 44.h4 h5 45.Ke5 f3 46.Kf4 b4 47.Kf3 Kc4 48.Ke3 Kc3 49.Rb1 b3 50.Kf4 Kc2 51.Rf1 b2 52.Kg5 Kd3 53.Kh5 Ke2 54.Rb1 Kd2 55.Rb2 Kc3 56.Rf2 Kd4 57.Kg6 Ke4 58.h5 Ke3 59.Rf8 Ke4 60.h6 Ke3 61.h7 Ke4 62.h8Q Ke3 63.Rg8 Ke4 64.Rg7 Ke5 65.Qf8 Ke6 ½–½. elektrooon – fakazer, kurnik, 2012.

4.Nf3 Nf6 5.e3 d5 6.Bb2 Nbd7 7.Be2 e6 8.0–0 Bd6 9.d3 (9.Ba3 0–0=) 9...e5 (9...0–0 10.Ba3=) 10.d4 e4 (10...Qe7 11.de5 Ne5 12.Ne5 Be5 13.Be5 Qe5 14.Nd2=) 11.Ne5 (11.Nh4 0–0=) 11...0–0 12.Nc6 (12.c4 Qe7 13.Nd7 Qd7=) 12...Bc6=+ 13.bc6 Nb8 14.Bb5 Qe8 (14...Be7 15.f3=) 15.c4 dc4 (< 15...Nc6 16.cd5 Nd5 17.Qc1 Nd4 18.Bd4+/–) 16.Qc2 (16.d5 Be5 17.Nc3 Qe7=) 16...Nd5 (16...Qe6 17.Bc4 Qf5 18.Bb5=) 17.Qc4 (17.Nc3 Nf6=) 17...Nb4 (17...Qe6 18.Rd1=) 18.Ba3 (18.Nd2+=) 18...Qe6 (18...Qe7!?+=) 19.Qe6+/– fe6 20.Nc3 (20.Rc1 e5 21.Bc4 Kh8 22.d5+/–) 20...Rf7 (20...N4c6!? 21.Ne4 Ba3 22.Ra3 Nb4+/–) 21.Ne4 (21.Bb4 ab4 22.Ne4 Bf8+–) 21...Nc2 (21...N8c6 22.Rab1 Bf8 23.Ng5+–) 22.Ra2 Na3 23.Ng5?? Nb5 24.ab5? Rf6 25.e4 Rg6 26.h4 h6 27.e5 Be7 28.Nf3 Nc6?? 29.Kh2?? Nb4–+ 30.Rb2 Rd8 31.g3 Rg4 32.Rd2 Nd5 33.Rc1 Rd7 34.Rdc2 Bd8 35.Rc6 Kf7 36.Kh3 h5 37.Ng5 Bg5 38.hg5 Rd4 39.g6 Kg6 40.Re6 Kf7 41.Rec6 Rd2 42.Kg2?? Rb2 43.e6=+ Ke7 44.ed7 Kd7 45.Kf3 Rb5 46.Ke4? a4 47.R6c2 a3 48.Rd1 c6 49.Ra2 Ra5 50.Rh1?? g6 51.f4 Ke6 52.g4 Nc3 53.Kd4 Na2 54.f5 gf5 55.gf5 Kf6 56.Rh5 Ra4 57.Kd3 Nb4 58.Kc3 a2 59.Rh6 Kf5 60.Rh1 a1Q 61.Ra1 Ra1 (62.Kb4 Ra4 63.Kc3 b5–+) 0–1. metal – JODIE (1640), caissa.com, 2007.

4.Nf3 Nf6 5.e3 d6 6.Bb2 g6 7.Be2 Bg7 8.c4 0–0 9.0–0 Nbd7 10.Nd4 Nc5 11.Nc6 Bc6 12.bc6 Qe8 13.Bf3 (13.d4 Na6+=) 13...Ne6 (13...Nd3 14.Bf6 Bf6 15.Ra3=) 14.Nc3 Ng5 (14...Nd8 15.Nb5 Rc8 16.d3+=) 15.Nd5 (15.Nb5!? Rc8 16.d3+/–) 15...Nf3 16.Qf3 Nd5 17.Bg7 Kg7 18.cd5 e6 19.e4 ed5 20.ed5 Qe5 21.Rfe1 Qf6 22.Qf6 Kf6 23.Re3 Rfe8 24.Rae1 (24.d4 Re3 25.fe3 Kf5 26.Rf1 Ke4 27.Rf7 Ke3 28.Rc7 Kd4 29.Rh7 Kd5+=) 24...Re3 25.de3 Re8 (25...b5+=) 26.Rb1 (better is 26.e4=) 26...Re4 27.Ra1 Ke5 28.Kf1 Kd5 29.Rd1 Kc6 30.Ke2? (30.Rc1 Kd7 31.Ra1–+) 30...Ra4 31.f3 (31.Rd2 b5 32.h4 b4 33.Rc2 Kb6–+) 31...Kd7 (31...Ra2 32.Kd3 Rg2 33.h4–+) 32.Kd3 b5 33.Rc1 (33.Rb1 Ra3 34.Kc2 b4–+) 33...d5 (33...Ra3 34.Kd2–+) 34.g3 (34.e4 de4 35.fe4 Ra2–+) 34...Rc4 (34...Ra3 35.Kc2–+) 35.Rd1 (35.Ra1 a4–+) 35...Kd6 36.e4 (36.h4 c5–+) 36...de4 (36...c5 37.Rb1 b4 38.Kd2–+) 37.fe4 Ke5 (better is 37...c5 38.Ke3 Rd4 39.Rb1–+) 38.Ke3 (38.Rf1 f6 39.Rb1–+) 38...a4 (better is 38...Re4!? 39.Kf3 c5 40.Rd7–+) 39.Rd7?? (39.Rd5 Ke6 40.Rb5–+) 39...a3 (better is 39...Rc3 40.Kd2 b4 41.Re7 Kf6–+) 40.Re7 (40.Rd5 Ke6 41.Rb5–+) 40...Kf6 41.Rd7 a2 42.Rd1 b4 43.g4 (43.e5 Ke5 44.Rg1 b3–+) 43...b3 44.Rf1 Ke6 45.g5 b2 46.Rf6 Ke7 47.Kd3 b1Q 48.Kc4 Qc2 49.Kd5. TIROLOCO – baretti, Live Game Caissa's Web, 2004.

4.Nf3 g6 5.Bb2 Nf6 6.e3 Bg7 7.g3 Kf8 8.Bg2 h5 9.h4 Ng4 10.Bg7 Kg7 11.0–0 Kg8 12.c4 d6 13.d4 Nd7 14.d5 Nc5 15.Nc3 Bc8 16.Ng5 f6 17.Nge4 Ne4 18.Ne4 g5 19.hg5 fg5 20.Ng5 e6 21.de6 Qg5 22.Ba8 Be6 23.Bd5 Bd5 24.Qd5 Qd5 25.cd5 h4 26.gh4 Rh4 27.Kg2 Ne5 28.f4 Nd3 29.Kg3 Rh7 30.Rh1 Rg7 31.Kf3 Kf7 32.Rag1 Rg1 33.Rg1 Nc5 34.Rc1 Ke7 35.e4 Kd7 36.Ra1 Nb3 37.Ra3 Nd2 38.Kg4 Nc4 39.Ra1 Ne3 40.Kg5 Nc2 41.Rc1 Nb4 42.f5 Nd3 43.Rc3 Nc5 44.Ra3 Ne4 45.Kg6 Ke7 46.Re3 Kd7 47.Re4 c6 48.dc6 Kc7 49.f6 d5 50.Re1 Kd6 51.f7 d4 52.f8Q 1–0. rryy44 – kazi1964, kurnik, 2012.

4.Nf3 h5 5.Bb2 (5.d3 Nf6=) 5...h4+= 6.h3 Nf6 7.e3 d6 (7...e6 8.Bc4+=) 8.Be2 (8.Bc4 e5+=) 8...e5 9.c4 (9.0–0 Be7+=) 9...Nbd7 10.Nc3 Be7 11.Nd5 (11.0–0 e4 12.Nd4 Ne5+=) 11...0–0 (better is 11...Nd5 12.cd5 Bd5=+) 12.Ne7+/– Qe7 13.0–0 (13.Nh4 Rfe8+/–) 13...e4 (13...Bf3 14.Bf3 e4 15.Be2+=) 14.Nh4+/– Qe6 15.Bg4 (15.f4 Rad8+/–) 15...Qe8 (15...Ng4 16.Qg4 Qg4 17.hg4+=) 16.Be2 (16.f4+/–) 16...Nc5?? (better is 16...Qe6=) 17.Nf5 (17.Bf6 gf6 18.f3 Qe6+–) 17...Rd8 (17...Qe6 18.Nd4 Qe7 19.f3+/–) 18.d3 (18.Bf6 gf6 19.d4 Ne6+–) 18...d5 19.Bf6+– gf6 20.de4 dc4 21.Qc2?? Be4–/+ 22.Qb2 Bf5–+ 23.Qf6 Bg6 24.Bc4–/+ Qe4 25.Ba2 Rd2 26.h4? Ne6 27.Be6 Qe6 28.Qg5 Qf5 29.Qf4? Qf4–+ 30.ef4 Rfd8 31.Rac1 Bc2 32.f5 Rf2 (33.Kf2 Ba4 34.Rc7 Bb5+–; better is 32...Kg7–+) 0–1. stoker – Schoolage, Live Game Caissa's Web, 2006.

4.Bb2 e6

5.e3 a5 6.Nf3 (6.h3 Nf6 (6...d5 7.Bd3 Nd7 8.Nc3 e5 9.Bf1 Ngf6 10.Nf3 Bc5) 7.Nf3 d5 8.Nc3 Nbd7 9.Bd3 Bd6 10.0–0 0–0; 6.Nc3 d5 7.f4 Nf6 8.Nf3 Nbd7 9.Bd3 Bd6 10.0–0 0–0) 6...Nh6 (6...d5 7.Nc3 Nf6 8.Bd3 Nbd7 9.0–0 Bd6 10.Ba3 Ba3; 6...Nf6 7.Nc3 d5 8.g3 Nbd7 9.Bg2 Bd6 10.0–0 0–0; 6...h6 7.Bd3 Nf6 8.0–0 Bd6 9.Na3 Ne4 10.Nc4 0–0; 6...Ne7 7.Nc3 Nf5 8.Bd3 Bb4 9.0–0 0–0 10.Ne4 d5; 6...h5 7.Nc3 Bd6 8.Bd3 Nf6 9.0–0 0–0 10.h3 Qe7) 7.Be2 (7.Bd3 Nf5 8.Nc3 Be7 9.e4 Nh4 10.Nh4 Bh4) 7...c6 (7...Nf5 8.Nc3 Bb4 9.0–0 0–0 10.Bd3 Qf6) 8.0–0 Bd6 (8...Nf5 9.e4 Nh4 10.Na3 Bc5) 9.Bg7 (9.Na3 0–0 10.Nc4 Bc7) 9...Rg8 10.Bh6 cb5?? (10...Qf6 11.Nc3 Qh6 12.bc6 Bc6 13.g3+/–) 11.ab5 (11.Nc3 Qf6 12.Nb5 Bh2 13.Kh2 Qh6 14.Kg1 Qh3 15.Nc7 Ke7–/+) 11...Rg6?? (better is 11...Qf6 12.Bf4 Bf4+/–) 12.Bf4+– Bf4 13.ef4 Bf3 14.Bf3 Ra7 15.g3 Rc7 16.Nc3 Rc5 17.Na4 (17.f5 Rg8 18.fe6 de6+–) 17...Rb5 18.Rb1 Rb1 19.Qb1 Nc6 20.Nb6 Nd4 21.Be4 f5 22.Bd3 Nf3 23.Kg2 Nd2 24.Qb5 (better is 24.Qb2 Qc7 25.Qh8 Kf7 26.Qh7 Rg7 27.Qh5 Rg6 28.Rd1 Qc6 29.f3 Qb6 30.Rd2+–) 24...Nf1 25.Kf1 e5? (25...Qc7+–) 26.Qe5 Re6 (26...Qe7 27.Qa5 Rh6+–) 27.Qh8 (27.Qh8 Ke7 28.Nd5 Kd6 29.Qd8 Kd5 30.Qd7 Kc5 31.Qe6+–) 1–0. valpa – footyhead, playchess.de, 2003.

5.e3 ab5 6.ab5 Ra1 7.Ba1 Nf6 8.Nc3 d5 9.Nf3 Nbd7 10.Bb2 Bd6.

5.e3 Bd5 6.c4 Be4 7.d3 Bf5 8.Qf3 d5 9.cd5 Bb4? (9...Qd5 10.Nd2 Bg6 11.Qd5 ed5 12.Ngf3+=) 10.Bc3?? (better is 10.Nd2!? Qg5 11.de6+–) 10...Bc3 (10...Qf6!? 11.Ra3 ed5 12.Qd5 c6 13.bc6 Qc6 14.Qf5 Ba3 15.Qe5 Be7 16.Qg7 Bf6 17.Bf6 Qf6 18.Qf6 Nf6+/–) 11.Nc3+– Nd7 12.e4 Ne5? (12...Bg6 13.de6 fe6 14.d4+–) 13.Qf4 (13.Qg3 Ng6+–) 13...Qf6? (13...Qd6 14.Qg5 Bg6 15.d4+–) 14.Rc1 (better is 14.d4!? Ng4 15.ef5 Qf5+–) 14...Bg4 15.Qf6 gf6 (15...Nf6 16.h3 Bh5+–) 16.h3 Bh5 17.g4 Bg6 18.f4 Nd7 19.de6 (better is 19.f5!? ef5 20.ef5 Ne7+–) 19...fe6 20.Bg2 Nc5 21.d4?? (better is 21.Rd1+–) 21...Nd3+= 22.Kd2 Nf4 (better is 22...Nc1!? 23.Kc1 Rd8+=) 23.Bf1+/– 0–0–0 24.Ke3 e5 25.d5 (better is 25.de5 fe5 26.Nf3+–) 25...c6?? (better is 25...Kb7+/–) 26.bc6+– h5 (26...Ne7 27.Ba6 Kb8 28.Nge2 Be4 29.Ke4 (29.Ne4?! Nfd5 30.Kf3 Rhf8+–) 29...Nfd5 30.Nd5 Nd5 31.Rhd1+–) 27.Nge2 (better is 27.Ba6 Kb8 28.Nb5 Ne7 29.c7 Ka8 30.cd8R Rd8+–) 27...hg4 28.Nf4 ef4 29.Kf4 Nh6 (29...Rh4 30.Ba6 Kb8 31.Nb5 gh3 32.Kg3+–) 30.hg4 Nf7 (30...b5 31.ab5 Kc7+–) 31.Bg2 (better is 31.Ba6 Kb8 32.Rh8 Rh8 33.Nb5+–) 31...Nd6 32.Rh8 Rh8 33.Rh1 Rh1 34.Bh1 Be8 (34...Nf7 35.Nb5+–) 35.e5 fe5 36.Ke5 Kc7 37.Bf3 (better is 37.Nb5 Nb5 38.ab5 Kd8+–) 37...Nf7 38.Kf6 Nd6 39.g5 Nc4 (39...Bf7 40.Nb5 Nb5 41.ab5 Kd6 42.Kf7 a4+–) 40.g6 Nd6 41.g7 Bf7 42.Nb5 Nb5 43.Kf7 Nd6 (43...Nd4 44.g8Q Nf5 45.Ke6 Nd4 46.Kf6 b5 47.d6 Kb6 48.c7 Kc5 49.Qd5 Kb4 50.Qd4 Kb3 51.Bd5 Kc2 52.Ba2 b4 53.c8Q) 44.Kf8 (44.Kf8 Nc8 45.g8Q+–; 44.Ke6 Kb8 45.g8Q Kc7 46.Qg7 Nf7 47.Qf7 Kc8 48.Qd7 Kb8 49.Qb7) 1–0. Hal1958 – Foxcar, playchess.de, 2004.

5.Nf3 d5 6.e3 Nf6 7.Be2 c5 8.d3 Nbd7 9.Nbd2 Bd6 10.0–0 0–0 11.c4 Re8 12.cd5 ed5 (12...Bd5? 13.e4+–) 13.Rc1 Qc7 14.d4 c4 15.Nc4 dc4 16.Bc4 Bf3 17.Bf7?? (better is 17.Qf3 Qb8 18.h3+=) 17...Kf7–+ 18.Qb3 (18.Qf3 Qb8 19.g3–+) 18…Bd5 (18...Bd5 19.Rc7 Bb3–+) 0–1. capitanjack – 3mjack (1715), kurnik, 2012.

5.e3 Nf6

6.Nc3 d5 (6...Bd6 7.Nf3 0–0 8.Bd3 Qe7 9.a5 ba5 10.Ra5 e5) 7.Nf3 Bd6 8.a5 c6 9.bc6 Nc6 10.ab6 Qb6.

6.d4 Bb4 7.c3 Bd6 (7...Be7 8.Nf3 Ne4 9.Bd3 f5 10.0–0 0–0=) 8.Nf3 0–0 9.Bd3 Ne4 10.0–0 f5 =.

6.d4 Nd5 7.Nf3 (7.e4 Nf6 8.e5 Ne4 9.Nf3 Bb4 10.c3 Be7=) 7...Bb4 (7...f5 8.Be2 Bd6 9.c4 Nb4 10.0–0 0–0+=; 7...Bd6 8.Be2 0–0 9.0–0 Nf6 10.c4 Bb4+=; 7...Be7 8.Be2 0–0 9.0–0 f5 10.c4 Nf6+=; 7...Ra7 8.Be2 Bb4 9.c3 Bd6 10.0–0 0–0+=) 8.c3 Be7 9.Bd3 0–0 10.0–0 f5 =.

6.d4 Be4 A) 7.Nf3 d5 (7...Bb4 8.Nbd2 Bf5 9.Be2 0–0 10.0–0 d5=; 7...Be7 8.Nbd2 Bf5 9.Be2 0–0 10.0–0 c6+=) 8.Nbd2 Bd6 9.Be2 0–0 10.0–0 Bf3=; B) 7.f3 Bb7 (7...Bg6 8.Nh3 Nd5 9.Qe2 Bb4 10.c3 Bb1=) 8.Bd3 Nd5 9.e4 Nf4 10.Bf1 d5=; C) 7.Ne2 Bb4 (7...Be7 8.f3 Bb7 9.e4 0–0 10.Nd2 d5=; 7...Bd6 8.f3 Bg6 9.e4 Nh5 10.g3 Bb4=; 7...d5 8.Ng3 Bg6 9.Be2 Bd6 10.0–0 c6=) 8.c3 Be7 9.Nd2 Bb7 10.c4 0–0=; D) 7.Nd2 d5 (7...Bf5 8.Ngf3 Bb4 9.Be2 0–0 10.0–0 d5=) 8.Ngf3 Bd6 9.Be2 0–0 10.0–0 c6=.

6.d4 Ne4 7.Nf3 Bb4 (7...Qf6 8.Bd3 Be7 9.Ba3 d6 10.0–0 0–0=; 7...f5 8.Bd3 Bb4 9.c3 Bd6 10.0–0 Qf6=; 7...Be7 8.Bd3 0–0 9.0–0 f5 10.c4 Bb4=) 8.c3 Bd6 9.Bd3 f5 10.0–0 0–0 =.

6.d4 Be7 7.Nd2 (7.Nf3 Ne4 (7...Nd5 8.Be2 0–0 9.0–0 Nb4 10.c3 Nd5+=; 7...0–0 8.Bd3 Be4 9.0–0 d5 10.Ne5 Bd3=; 7...Bb4 8.c3 Be7 9.Bd3 0–0 10.0–0 Ne4=; 7...Be4 8.Nbd2 Bf5 9.Be2 0–0 10.0–0 Bb4+=) 8.Bd3 0–0 9.0–0 f5 10.c4 Bb4=) 7...0–0 (7...c6 8.Ngf3= 0–0 9.Bd3 Re8 10.0–0 Nd5=; 7...Ne4 8.Ne4 Be4 9.Nf3 d5 10.Bd3 Bb4=; 7...Bb4 8.c3 Be7 9.Ngf3 Ne4 10.Bd3 f5=; 7...Bd5 8.c4 Bb7 9.Ngf3 0–0 10.Bd3 c6+=) 8.c4 (8.Ngf3 c6= 9.Bd3 cb5 10.ab5 Qc7=) 8...c6 (8...Bb4 9.Ngf3= Ne4 10.Ba3 Nd2=; 8...Ne4 9.Ngf3 Bb4 10.Ba3 Nd2=) 9.Rc1 (9.Ngf3 cb5 10.ab5 (10.cb5 Ne4=) 10...d5=) 9...Bb4+= 10.Ngf3 (10.f3 d6+=) 10...Ne4 11.Bd3 Nd2 12.Nd2 cb5 13.cb5 Bg2 14.Rg1 Bb7 15.Qh5 f5 16.d5 Rf7 17.Qh6 (17.Qh6 e5 18.Bf5+– (18.Be5?! Qe7 19.Bd4 Kf8 20.Qh7 Ke8+–)) 1–0. Nebe,Lutz – Wichert,P, corr, 1988.

6.Nf3 Ra7 A) 7.Nc3 Bc5 (7...Bb4 8.Be2 0–0 9.0–0 Qe7 10.Ne5 d6=; 7...d5 8.Be2 Bd6 9.Ba3 0–0 10.Bd6 cd6=; 7...Bd6 8.Be2 0–0 9.d3 Bb4 10.0–0 Qe7+=; 7...Be7 8.Be2 0–0 9.0–0 Bd6 10.d3 Qe7=) 8.Bc4 d5 9.Be2 0–0 10.0–0 Bd6=; B) 7.Bc4 Bc5 (7...Bb4 8.0–0 0–0 9.Qe2 Re8 10.Ne5 Bd5=; 7...d5 8.Be2 Bd6 9.0–0 0–0 10.Ba3 e5=; 7...Be7 8.0–0 0–0 9.Na3 d5 10.Be2 Nbd7=; 7...Bd6 8.Be2 Qe7 9.0–0 Ng4 10.h3 Nf6=) 8.0–0 0–0 9.Ne5 c6 10.d4 Bb4=; C) 7.Bd3 Bc5 (7...Bb4 8.0–0 0–0 9.Qe2 Ne4 10.Be4 Be4=) 8.0–0 0–0 9.Be2 Bb4 10.Ne5 d6=; D) 7.Be2 Bd6 (7...Be7 8.0–0 0–0 9.d3 d5 10.Nbd2 c6=; 7...Bc5 8.d4 Bb4 9.c3 Bd6 10.0–0 0–0+=; 7...Bb4 8.0–0 0–0 9.Ne5 d6 10.Nf3 Bf3=) 8.0–0 Ng4 9.h3 Nf6 10.d3 0–0=.

6.Nf3 Bb4 A) 7.Bc4 0–0 (7...Ne4 8.0–0 0–0 9.Be2 Qe7 10.d3 Nf6+=; 7...Qe7 8.0–0 0–0 9.c3 Bd6 10.d3 Ng4=; 7...d5 8.Be2 0–0 9.0–0 Bd6 10.Ba3 e5=; 7...Nd5 8.0–0 0–0 9.Bd4 Be7 10.Re1 Nf6=) 8.0–0 Qe7 9.Bd4 d5 10.Be2 Nbd7=; B) 7.Bd3 0–0 (7...Qe7 8.0–0 0–0 9.Nc3 Re8 10.Rb1 e5=; 7...Ra7 8.0–0 0–0 9.Nc3 Qe7 10.Qe2 e5=; 7...Ne4 8.Be4 Be4 9.0–0 0–0 10.d3 Bb7=; 7...Bc5 8.0–0 0–0 9.Na3 Qe7 10.Be2 Re8=) 8.0–0 Re8 9.Bd4 Bd6 10.Ne5 Be7=; C) 7.Nc3 d5 (7...0–0 8.Be2 Qe7 9.0–0 Qd6 10.d3 Re8=; 7...Qe7 8.Be2 0–0 9.0–0 Qd6 10.d3 Re8=) 8.Bd3 0–0 9.0–0 Nbd7 10.Re1 Ne4=; D) 7.Be2 0–0 (7...Qe7 8.0–0 0–0 9.Ne5 d6 10.Nd3 Nbd7=; 7...Nd5 8.0–0 0–0 9.c3 Bd6 10.c4 Nb4=; 7...Ne4 8.0–0 0–0 9.d3 Ng5 10.Nbd2 Nf3+=; 7...Ra7 8.0–0 0–0 9.d3 d5 10.Nbd2 Bd6=) 8.0–0 Qe7 9.Ne5 d6 10.Nd3 Nbd7=.

6.Nf3 Bc5= A) 7.Be2 0–0 (7...Bb4 8.0–0 0–0 9.Nc3 Qe7 10.Ne5 d5=; 7...Ra7 8.0–0 0–0 9.c4 Bb4 10.Qc2 d6=; 7...Qe7 8.d4 Bb4 9.c3 Bd6 10.0–0 0–0=) 8.0–0 Be7 9.Ne5 d6 10.Bf3 Qc8=; B) 7.Bc4 Bb4 (7...Qe7 8.0–0 0–0 9.d4 Bb4 10.Bd3 Ne4=; 7...d5 8.Be2 0–0 9.0–0 Bd6 10.Ba3 e5=; 7...Ne4 8.0–0 0–0 9.d3 Ng5 10.Nbd2 Nf3=; 7...0–0 8.0–0 d5 9.Be2 c6 10.Nc3 Ne4=) 8.0–0 0–0 9.Ne5 d6 10.c3 Bc5=; C) 7.Bd3 0–0 (7...Qe7 8.0–0 0–0 9.Be2 Re8 10.d4 Bd6=) 8.0–0 Qe7 9.Qe2 Ne4 10.Be4 Be4=; D) 7.d4 Bd6 (7...Bb4 8.c3 Bd6 9.Bd3 0–0 10.0–0 Ne4=; 7...Be7 8.Bd3 Nd5 9.Nbd2 0–0 10.0–0 f5=) 8.Bd3 Ne4 9.Be4 Be4 10.Nbd2 f5=.

6.Nf3 d5 A) 7.Be2 c5 (7...Bb4 8.0–0 0–0 9.d4 Ne4 10.Ba3 c5=; 7...Bc5 8.0–0 0–0 9.Ba3 Bd6 10.d4 Ba3=; 7...Be7 8.0–0 0–0 9.d4 Bd6 10.Qd3 c6=; 7...Bd6 8.0–0 0–0 9.d4 c6 10.Ba3 c5=) 8.0–0 Bd6 9.Be5 0–0 10.d4 Be5=; B) 7.d4 c5 (7...Bd6 8.Bd3 0–0 9.0–0 c6 10.Ba3 c5=; 7...Bb4 8.Nbd2 0–0 9.Bd3 c6 10.0–0 cb5=; 7...c6 8.Ba3 Ba3 9.Ra3 0–0 10.Bd3 c5=) 8.Be2 Nbd7 9.dc5 Bc5 10.0–0 0–0=; C) 7.Bd3 Bd6 (7...Nbd7 8.0–0 Bd6 9.Be2 0–0 10.Ba3 Rc8=; 7...Be7 8.0–0 0–0 9.Ne5 Nbd7 10.Qf3 Ne5=) 8.0–0 0–0 9.Ba3 c5 10.bc6 Nc6=; D) 7.Ba3 Bb4 (7...Ba3 8.Ra3 c5 9.bc6 Nc6 10.Bb5 0–0=) 8.Be2 Ne4 9.0–0 0–0 10.c3 Qf6=.

6.Nf3 Be7 A) 7.Bd3 Bc5 (7...0–0 8.Nc3 d6 9.0–0 Nbd7 10.Rb1 Nc5=; 7...Ne4 8.Nc3 f5 9.Be4 fe4 10.Nd4 Bf6=; 7...Bb4 8.0–0 0–0 9.Nc3 Re8 10.Na2 Bc5=) 8.0–0 0–0 9.Qe2 Qe7 10.Nc3 e5=; B) 7.Nc3 d5 (7...0–0 8.Be2 c5 9.bc6 dc6 10.0–0 Qd6=; 7...d6 8.Be2 0–0 9.0–0 e5 10.d3 Nbd7=; 7...Ra7 8.Be2 0–0 9.Rb1 Bb4 10.0–0 Qe7=) 8.Be2 0–0 9.0–0 Bd6 10.Ba3 Ne4=; C) 7.Bc4 c6 (7...d5 8.Be2 0–0 9.0–0 c5 10.bc6 Nc6=; 7...c5 8.bc6 dc6 9.0–0 0–0 10.d3 Nbd7=; 7...Ne4 8.0–0 0–0 9.Nc3 Nc3 10.Bc3 d5=; 7...0–0 8.0–0 d5 9.Be2 c5 10.bc6 Nc6=) 8.0–0 0–0 9.bc6 Nc6 10.Nc3 Rc8=; D) 7.Be2 Bd6 (7...Ra7 8.0–0 0–0 9.Nc3 Re8 10.d3 Bc5=; 7...0–0 8.0–0 Re8 9.Nc3 d6 10.d3 d5=; 7...d6 8.0–0 0–0 9.Nc3 Nbd7 10.Nd4 Nc5=; 7...Bb4 8.Nc3 0–0 9.0–0 Qe7 10.Ne5 d5=) 8.0–0 0–0 9.Nc3 Re8 10.d3 e5=.

6.f4 d5 7.Nf3 c5 8.c4 Be7 9.Be2 0–0 10.0–0 dc4 11.Bc4 Bd5 12.Be2 Qc7 13.Nc3 Rd8 14.Nd5 Nd5 15.Be5 Bd6 16.Bb2 Nb4 17.Qb3 Nd7 18.Qc3 Bf8 19.d4 Nf6 20.dc5 Bc5 21.Ne5 Nbd5 22.Qb3 Ne3 23.Kh1 Nf1 24.Rf1 Qd6 25.Nc6 Rd7 26.Bf3 Nd5 27.Be4 Re8 28.g4 Nf4 29.Be5 Qd2 30.Bf4 f5 31.Bd2 Rd2 32.gf5 1–0. jura1946 – abanit, kurnik, 2012.

4.Bb2 Nf6

5.c4 e6 6.e3 c5 7.Nf3 d5 8.Nc3 (8.Bd3 Bd6=) 8...d4 (8...Nbd7 9.cd5 ed5 10.Be2=) 9.ed4 cd4 10.Na2 (10.Ne2!? e5 11.Ne5=) 10...Bc5+= 11.d3 (11.Nc1 0–0 12.Nd3 e5 13.Nfe5 Re8+=) 11...0–0 (11...Qc7 12.Be2–/+) 12.Be2 Nbd7 13.0–0 e5 14.Nd2 (14.Nc1 Bd6–/+) 14...Re8 Black plans e4 (14...Bd6 15.Bf3 Qc7 16.Bb7 Qb7 17.Qf3 Qf3 18.Nf3+=) 15.Re1 (15.Nc1 e4–/+) 15...Qe7 (15...Qc7 16.Bf3–/+) 16.Nc1 (16.Bf3 Bf3 17.Nf3 Qd6–/+) 16...e4 (16...Bb4!?–/+) 17.de4+= Ne4 18.Kf1?? (better is 18.Bf3 f5 19.Nd3+=) 18...Qh4 (better is 18...Nf2 19.Bf3 Qd6 20.Bb7 Nd1 21.Rd1 Ra7–+) 19.Nf3?? (19.Ne4 Qh2 20.Bf3 Qh1 21.Ke2–+) 19...Qf2 0–1. mic (2190) – kode (2390), net–chess.com, 2008.

5.e3 c5 6.Nf3 d5 7.c4 e6 8.Be2 Nbd7 (8...Bd6 9.0–0=) 9.Qc2 (9.0–0 Bd6=) 9...Bd6 10.d3 (10.cd5 ed5 11.0–0 Rc8=) 10...Qc7 (10...dc4 11.dc4 Qc7 12.Nbd2=) 11.Nbd2 h6 (11...0–0 12.cd5 Bd5 13.Rc1=) 12.h3 (12.cd5 ed5 13.Nh4 0–0=) 12...Rg8 (12...0–0 13.cd5 Nd5 14.0–0=) 13.0–0–0 (13.cd5 Nd5 14.Nc4 Rd8+=) 13...e5= 14.e4 (14.cd5 Nd5 15.Kb1 Nb4=) 14...d4 15.Nh4 (15.Qb3 0–0–0+=) 15...Nf8 (15...g6 16.g3+=) 16.Nf5 Ng6 (16...Ne6 17.Kb1+=) 17.Nf3 (17.Bf3 0–0–0+=) 17...0–0–0 (17...Nf4 18.Kb1+=) 18.Kb1 (18.Nd6 Qd6 19.Kb1 Nf4+=) 18...Kb8 19.Bc1 Bc8 20.Nd6 Qd6 21.g3 Be6 (21...Rge8 22.Bf1+=) 22.Nd2 (22.Bf1 Rge8+=) 22...Qd7 (22...Rge8 23.Bf3+=) 23.Bf1 (23.h4 h5+=) 23...Nh7 (23...h5 24.Nf3+=) 24.Bg2= h5 25.Nb3 h4 (25...Qd6 26.Rde1=) 26.f4+= f5? (better is 26...ef4!? 27.gf4 f5+=) 27.ef5+/– Bf5 28.g4 Nf4 29.gf5 Ng2 (29...Qf5!? 30.Bf4 ef4+/–) 30.Qg2+– Qf5 31.Rhg1 (31.Rhf1 Qd7+–) 31...Nf6 (31...g5 32.Qc6 Qg6 33.Qg6 Rg6 34.Rdf1+–) 32.Qc6 Nd7 33.Bg5 Rc8 34.Qd6 Ka7?? (34...Rc7+–) 35.Rgf1 (35.Rgf1 Qh3 36.Rf7+–) 1–0. Timmermans,A – Vos,J, Dordrecht, 2001.

5.e3 e6 6.Nf3 d5 (6...Bc5 7.d4 Bb4 8.c3=) 7.Be2 Bd6 8.0–0 0–0 9.d3 (9.Be5 Be5 10.Ne5 c5=) 9...Re8 (9...c6 10.Na3=) 10.Nbd2 c6 11.c4 cb5 (11...e5 12.Rc1=) 12.cb5 (12.ab5 Nbd7=) 12...Nbd7 (12...e5 13.Rc1=) 13.Nd4 Rc8 14.f4 e5 (14...Qe7 15.Rc1=) 15.Nf5 Bf8 (15...Bc7 16.fe5 Be5 17.Be5 Ne5 18.Qe1=) 16.fe5+= Ne5 17.Nb3 (17.Rc1 Rc1 18.Qc1 Bb4+=) 17...g6 (17...Ned7 18.Bd4+=) 18.Ng3 h5 (better is 18...Bh6 19.Bd4 Ned7+=) 19.Rf2 (better is 19.Rc1+=) 19...Nfg4–/+ 20.Bg4 Ng4 Black intends Qh4 (worse is 20...hg4 21.Be5 Re5 22.Qg4+/–) 21.Rf3 (better is 21.Re2!? Ne3 22.Qe1–/+) 21...Ne3–+ (21...Re3?! 22.Bf6 Qd6 23.Bd4–/+) 22.Re3 Re3 23.Nh5 (23.Bd4 Re6–+) 23...d4! 24.Bd4 (24.Nd4 gh5) 24...Re6 (24...Bc5 25.Bc5 bc5 26.Qg4 Qd3 27.Na5–+) 25.Qg4 (25.Nf4 Rd6 26.Be5 Qg5+=) 25...Qd5–/+ 26.Nf4 Qb3 27.Ne6 Qe6 28.Qe6 fe6 29.Bb6 Bc5 (29...Rc2!? 30.Bf2 Bg7–+) 30.Bc5–/+ Rc5 31.Ra2 (31.Rf1 e5–/+) 31...e5 (31...Rc3!? 32.Kf2–+) 32.Kf2–/+ Rc3 33.Rd2 (33.Re2 Rd3 34.Re5 Rd2 35.Re2 Re2 36.Ke2 Kf7+=) 33...Kf7–+ 34.Ke3 (34.d4 e4 35.Ke2–+) 34...Ke6 35.g4 (35.Ra2 e4–+) 35...Ra3 36.Rc2 (36.Rf2 Ra4 37.h3 Ra3–+) 36...e4 (36...Ra4!? 37.g5–+) 37.Rc7 Rd3 38.Kf4 (38.Ke2 Bd5 39.Rg7 Ra3 40.Rg6 Ke5–+) 38...Rf3 (38...e3 39.Rc2–+) 39.Kg5 Rf7 (39...e3!? 40.Rc1–+) 40.Rc3 (40.Rc2 Rf1 41.Kg6–+) 40...Ke5 (40...Rf2!? 41.Kg6 Rh2 42.Ra3–+) 41.Kg6–/+ Rf3 42.Rc7 Bd5 43.h4 (43.Re7 Kd6 44.Re4 Be4 45.Kg7–+) 43...e3 44.Rc1 Rf4 45.Kg5 (45.g5 Rh4 (worse is 45...Ra4 46.h5–+) 46.Re1 Re4–+) 45...Ra4 (45...e2 46.Re1 Bf3 47.Kh6–+) 46.h5 (46.Re1 Ke4 47.h5 Rb4–+) 46...Be6 (46...Bf3 47.Kh6–+) 47.h6 (47.Rc5 Kd6 48.Rc1 Rg4 49.Kf6 Rf4 50.Kg6 e2–+) 47...Rg4 48.Kh5 Rg2 49.b6 Bf7 (49...Kf5 50.Kh4 Rg4 51.Kh3–+) 50.Kh4 Rg6 (50...Rh2 51.Kg3 Rh6 52.Re1–+) 51.b7 (51.h7 Rh6 52.Kg3–+) 51...Rh6 52.Kg4 Rb6 53.Kf3 Bd5 (53...Rb7 54.Re1–+) 54.Ke3 Rb3 55.Kd2 Rb7 (55...a4 56.Ra1 Bc6 57.Ra3 Rb2 58.Kd3 Rb7 59.Kc3–+) 56.Ra1 Rb5 (56...Ra7 57.Kc3–+) 57.Kd3 Kd6 58.Kd4 (58.Ra3 Bc6–+) 58...Rc5 (58...Rb4 59.Kc3 Rc4 60.Kb2–+) 59.Rb1 (59.Ra4 Bb3 60.Ra1 Rc4 61.Ke3 a4–+) 59...Rc4 60.Kd3 Kc5 61.Rb8 (61.Re1 Be4 62.Ke3 a4–+) 61...Be4 62.Kd2 a4 63.Rc8 Bc6 64.Kd3 (64.Rc7 a3 65.Ra7 Kb4–+) 64...Kb4 (better is 64...a3 65.Rc6 Kc6 66.Kc4–+) 65.Rb8 Bb5 66.Kd2 (66.Ke3 a3 67.Ra8 Kb3–+) 66...a3 67.Rg8 (67.Ra8 Kb3–+) 67...a2 68.Ra8 (68.Rg1 Rf4 69.Ra1 Rf1 70.Ra2 Rf2 71.Ke3 Ra2–+) 68...Kb3 (68...Ba4 69.Rb8 Kc5 70.Rc8 Kd4 71.Rc4 Kc4 72.Ke3–+) 69.Ra5 (69.Ra2 Ka2 70.Kd3 Kb3–+) 69...Rc2 (better is 69...Ba4 70.Rd5 Rc2 71.Ke3–+) 70.Kd1 Ba4 71.Ra4 Ka4 72.Kc2 0–1. Eckhoff,Karlheinz (1690) – Krek,Janez (1960), Raika op 6th, 1997.

5.e3 g6 6.f4 Bg7 7.Nf3 0–0 8.c4 d6 9.d4 Nbd7 10.Bd3 e6 11.Nbd2 Re8 12.0–0 Nh5 13.Qe2 e5 14.fe5 de5 15.d5 e4 16.Ne4 Bb2 17.Qb2 Nc5 18.Nc5 bc5 19.Rae1 Qe7 20.g3 Rad8 21.e4 Ng7 22.Qc3 Bc8 23.Re3 Bg4 24.Rfe1 Bf3 25.Rf3 Qg5 26.Kg2 h5 27.h4 Qg4 28.Rf4 Qd7 29.e5 Rf8 30.Be4 Ne8 31.Ref1 Ng7 32.R1f2 Rde8 33.Rf6 Qe7 34.e6 fe6 35.Bg6 ed5 36.Be8 Qe4 37.Qf3 Qf3 38.R2f3 Re8 39.cd5 c4 40.Rc6 Re4 41.Rc7 Re2 42.Rf2 Rf2 43.Kf2 c3 44.b6 c2 45.Rc2 Ne8 46.b7 Kf7 47.b8Q Nf6 48.Qf4 Ke7 49.Qf6 Kd7 50.Re2 Kc7 51.Qc6 Kd8 52.Re8 1–0. amator111 (1660) – pudak, kurnik, 2012.

5.Nf3 d5 6.e3 =.

5.Nf3 e6 6.c4 (6.e3 d5=) 6...Be7 (6...Bb4 7.g3=) 7.e3 (7.g3 0–0=) 7...0–0 (7...d6 8.Nc3=) 8.Be2 d5 (8...Bb4 9.Nc3=) 9.0–0 c6 (9...Nbd7 10.d4=) 10.Nc3 dc4 (10...c5 11.cd5 ed5 12.d4=) 11.Qc2 (11.Ne5 cb5 12.Nb5 c3 13.Nc3 Nc6+=) 11...cb5= 12.ab5 (12.Nb5!? Na6 13.Bc4=) 12...Nbd7+= 13.Bc4 Bf3 14.gf3 Ne5 15.Be2 Rc8 16.Rad1 (16.d4 Nc4+=) 16...Nd5 (16...Nc4 17.f4+=) 17.Qe4+= Bd6 (17...Bf6!?+=) 18.Nd5+= ed5 19.Qd5 Rc5 20.Qe4 Qg5 (20...Re8!? 21.d4 Nd3 22.Qe8 Qe8 23.dc5 Bh2 24.Kh2 Qe7+/–) 21.Kh1+= Qh5 22.Be5 (better is 22.Rg1!?+=) 22...Re5 (22...Be5 23.f4 Qe2 24.fe5=) 23.Qg4 (better is 23.f4 Qh2 24.Kh2 Re4 25.Rc1=) 23...Qh6 (better is 23...Rb5!? 24.Qh5 Rh5+=) 24.f4+= Re6 25.Rc1 Rg6 (25...a4 26.d4+=) 26.Qh5 (26.Qf3+=) 26...Bb4 (better is 26...a4!?+=) 27.d4 (27.Qh6 Rh6 28.d4 Re6+/–) 27...Re8 (27...Qh5 28.Bh5 Rd6 29.Rc7+/–) 28.Qh6 Rh6 29.Rc6 (29.Rc4 Rf6+/–) 29...Rd6 (29...Rc6!? 30.bc6 Rc8+/–) 30.Rfc1 (30.Kg2 Kf8+/–) 30...Rb8 (30...Kf8 31.Kg2+–) 31.R1c4 (31.Kg2 g6+–) 31...Kf8 (31...Rbd8 32.Kg2 Kf8 33.Bg4+/–) 32.Bg4 (32.Rc7 Rbd8+–) 32...g6 (better is 32...Rbd8+–) 33.Rc8 (better is 33.Rb4 Rc6 34.bc6 ab4 35.c7+–) 33...Rc8+/– 34.Rc8 Kg7 (34...Ke7 35.Kg2+=) 35.Bf3+/– f5 (35...h6 36.Rc7+/–) 36.Rc7 Kh6 (better is 36...Kf6+/–) 37.Bc6 (better is 37.h4+/–) 37...a4= 38.Rb7 Ba5 39.Be8 Rd5 (better is 39...a3 40.Bf7 g5=) 40.Bc6 (40.Rc7 a3+=) 40...Rd6 41.Ra7?? (better is 41.Be8=) 41...a3–+ 42.d5 (42.Kg2 a2–+) 42...a2 43.Kg2 a1Q 44.Re7 Qa2 45.Rb7 Be1 0–1. tightfist (2205) – kode (2420), net–chess.com, 2008.

3.a4 c5

4.Bb2 d5 5.e3 e6 6.Nf3 Nf6 7.g3 (7.Be2 Nbd7=) 7...h6 (7...Bd6 8.Bg2+=) 8.Bg2= Be7 9.0–0 0–0 10.d4 (10.d3 Bb7=) 10...c4 (10...Bb7 11.dc5 Bc5 12.c4=) 11.Ne5 Qe8 (better is 11...Ra7!?=) 12.Nc4!+/– Ne4? (12...dc4 13.Ba8 Pinning (13.Ba8 Deflection)) 13.Nb6+– Ra7 14.Nc8 (14.c4 Bb7+–) 14...Qc8 15.Qd3 (15.Be4 de4 16.Nd2 Rc7+–) 15...Nd7 (15...Nd6 16.Nd2+–) 16.Be4 (16.c4 Rc7 17.c5 Bf6+–) 16...de4 17.Qe4 f5 (17...Nf6 18.Qd3 Rc7+–) 18.Qe6 Rf7 19.Nc3 (better is 19.c4 Qd8+–) 19...Rc7 (19...Bb4 20.Nd5 Qc2+–) 20.Nd5 Rc2 (20...Bf6 21.Nc7 Qc7+–) 21.Ne7 (21.Ne7 Kf8 22.Nc8 Rc8 23.Ba3 Kg8 24.Rac1+–) 1–0. bridlingtonbrummie – MissLayla, ChessWorld.net, 2009.

4.c4 d6 5.d4 e5 6.d5 f6 7.e4 g5 (7...f5+=) 8.f4 (8.Be2 Ne7+/–) 8...h6 (better is 8...ef4!? 9.Bd3 Bg7=) 9.f5+/– Ke7 10.g4 Bg7 11.h3 Rh7 12.h4 Bh8 (12...Ke8 13.Nf3 Rh8 14.Nc3+/–) 13.h5 (better is 13.hg5!? fg5 14.Bg5 Bf6 15.Be3+–) 13...Nd7 14.Bf4?? (14.Nf3 Kf8+/–) 14...Qf8?? (better is 14...ef4 15.Nd2 Ne5–+) 15.Bh2 Qf7 16.Bh3 Bb7 17.Kf2 Rb8 18.Nf3 Kf8 19.Nh4?? (19.Bg2 Ne7+=) 19...Ke8?? (better is 19...gh4 20.Bg1 Ne7–+) 20.Ng6+= Rd8 21.Ne7?? (21.Bg2 Bg7+=) 21...Ra8?? (better is 21...Qe7 22.Kg1 Kf8–+) 22.Nc6 Bc8 23.Nd4?? (23.Kg1 Bg7+/–) 23...Nb8?? (better is 23...cd4 24.Bg2 Kf8–+) 24.Nf3 Bg7 25.Ng1 Bf8 26.Bf1 Rh8 27.Bf4?? (27.Nf3 Qe7+/–) 27...Qe7?? (better is 27...gf4 28.Nf3 Kd8–+) 28.Bc1+/– Qc7 29.Ke1 Qd8 ½–½. Limbourg,Philipp – Wuebbeke,Christoph, Ruhrgebiet–ch U17, 1997. (=1.a4 a5 2.b4 b6 3.b5 c5)

4.bc6 dc6= 5.g3 Bb7 6.Bg2 Qc7 7.e3 c5 8.Ne2?? (better is 8.Nf3=) 8…Bg2–+ (8...Bg2 9.Rg1 Bc6–+) 0–1. diablo005 – castel100, kurnik, 2012.

4.Nf3 d5 5.g3 (5.e3 Nf6=) 5...Bb7 6.Bg2 e6 7.0–0 Bd6 8.Bb2 Nf6 9.e3 (9.Ne5 Qc7 10.Nf3 0–0=) 9...Nbd7 10.Qe2 (10.Na3 0–0=) 10...0–0+= 11.c4 Re8 (11...dc4 12.Na3+=) 12.d4 dc4 13.Qc4 Rc8 (13...Qe7 14.Nc3=) 14.Qe2 (14.Nc3 Bd5 15.Qd3 c4=) 14...e5+= 15.dc5 (15.de5 Ne5 16.Rd1 Bf3 17.Bf3 Qe7=) 15...Nc5 16.Nbd2 (16.Rd1 Bd5 17.Nc3=) 16...Ncd7 (16...Bd5 17.Rfd1+=) 17.Rfc1 (17.Nc4 Qe7=) 17...Qe7 Black prepares the advance e4 (17...Rc1 18.Rc1 Nc5 19.Nc4 Na4 20.Rd1=) 18.Nc4 Bb8 (18...e4 19.Nd6 Qd6 20.Nd4=) 19.Ba3+= Bf3 (19...Qd8 20.Nfe5 Bg2 21.Nd7 Qd7 22.Kg2 Qd5 23.Kg1+/–) 20.Bf3 (20.Qf3 Qe6 21.Nd2 e4+=) 20...Qe6 21.Rc2 (21.Bb7 Rc7 22.Bc6 e4+=) 21...e4= 22.Bg2 Nc5 (22...Ne5 23.Ne5 Be5 24.Rac1=) 23.Na5 Nb3 (23...Be5 24.Rac1 Na4 25.Nc6+=) 24.Nb3+/– Qb3 25.Rc8 Rc8 26.Qd1 Qd1 27.Rd1 Be5 (27...Re8+–) 28.Be7 Bc3 (28...h6 29.Rd8 Rd8 30.Bd8+–) 29.Rd8 (29.Bd8 Rc4+/–) 29...Rd8 30.Bd8 Nd7 31.Be4 Nc5 32.Bc2 Ba5 33.f4 (33.h3 h5+–) 33...h5 34.Kf2 Kf8 35.Bc7 Ke7 36.Be5 f6 37.Bd4 Ne6 38.Bg6 (38.Bb2 Nc5+–) 38...Nd4 39.ed4 h4 40.g4 (40.gh4 Bd2+–) 40...Ke6 41.Ke3 h3 (41...Bc3 42.Kd3 Bb2 43.Bf5 Kd6 44.g5+–) 42.Be4 Bb4 43.Kf3 Bd6 44.Kg3 (44.Bg6 Kd5 45.Ke3 Ke6+–) 44...g5 45.Kh3 Bf4 46.Kg2 Be3 47.d5 Ke5 48.Kf3 (48.Bf3 Kd6+–) 48...Bc5 ½–½. Bott,Hans Joachim – Amend, Wuerzburg op, 1987.

3.a4 c6

4.c4 Bb7 5.d4 d6 6.e4 (6.Nc3 e6+=) 6...Nd7 (6...cb5!? 7.ab5 Be4+=) 7.Nc3 e5 8.Nf3 Ngf6 9.Bg5 Be7 10.Bd3 h6 11.Bh4 Nf8 (11...c5!? 12.de5 de5+=) 12.de5+/– de5 13.Ne5?? (13.bc6 Bc6 14.Ne5 Bb4+/–) 13...c5?? (13...Qd4 14.0–0 Qe5 15.bc6 Bc6–/+ (worse is 15...Qc3 16.cb7 Rb8 17.Rc1=)) 14.Bg3+/– N8d7? (14...Ne6 15.0–0+–) 15.0–0 (better is 15.Nc6!? Qc8 16.Ne7 Ke7 17.e5+–) 15...Ne5 16.Be5 0–0 17.Nd5 Nd5 18.ed5 Bd6 19.f4 f6 (19...Re8 20.Qh5+–) 20.Bc3 (20.Bd6 Qd6 21.Qg4 f5 22.Bf5 Rf6+–) 20...Qc7 21.Qg4 Bc8? (21...Rf7 22.Rae1 Kf8 23.Bg6+–) 22.Bf5 (better is 22.Qg6 f5 23.Rae1+–) 22...Bf5+/– 23.Qf5 Rae8 24.g3 Re3 25.Bd2 Re2 26.Rf2 Qe7 (better is 26...Rfe8!?+/–) 27.Re2+– Qe2 28.Qe6 Kh7?? (better is 28...Qe6 29.de6 Rd8+–) 29.Qe2 1–0. katchum (2530) – croach (2370), net–chess.com, 2013.

4.c4 c5 5.Bb2 d5 6.e3 Bb7 7.f4 e6 8.Nf3 Nf6 9.Be2 Be7 10.0–0 0–0 11.Ne5 Nbd7 12.Nc6 Bc6 13.bc6 Nb8 14.cd5 ed5 15.Nc3 Nc6 16.Bf3 Nb4 17.Ba3 Qd6 18.Bb4 ab4 19.Nb5 Qd7 20.d3 g6 21.h3 h5 22.Re1 Rfe8 23.e4 de4 24.Be4 Qd4 25.Kh1 Qf2 26.Ba8 Ra8 27.Qe2 Qf4 28.Qe7 Re8 29.Qd6 Re1 30.Re1 Kg7 31.Qf4 Nd5 32.Qb8 b3 33.Rb1 c4 34.dc4 Ne3 35.Qb6 Nc4 36.Qd4 f6 37.Qc4 1–0. aniabielak – federle, kurnik, 2012.

4.c4 c5 5.e3 Bb7 6.Nf3 h6 7.Bb2 d5 8.d4 Nd7 9.Nbd2 Ngf6 10.Be2 Qc7 (10...e6 11.0–0=) 11.dc5 (11.cd5 Bd5 12.0–0 e6+=) 11...Qc5 (11...Nc5 12.Be5 Qd8 13.0–0+=) 12.Rc1 Qb4 13.Qb3 (13.Qc2 Rc8+=) 13...Rc8 (13...Nc5 14.Qc2 Qa4 15.Qa4 Na4 16.Bd4+=) 14.0–0= Qd6 (better is 14...Nc5 15.Qb4 ab4 16.cd5 Na4 17.Rc8 Bc8+=) 15.cd5+– Bd5?? (better is 15...Rc1 16.Rc1 Nc5+–) 16.Rc8 1–0. Fournier,Frederic (2090) – guestpnfp, jeu.europe–echecs.com, 2013.

4.c4 c5 5.Nf3 Bb7 6.d4 Bf3 7.gf3 e6 8.d5 d6 9.e4 Qf6 10.Ra3 Nd7 11.Bh3 Ne5 (better is 11...0–0–0!?=) 12.f4+/– Nc4? (better is 12...Nd7+/–) 13.de6?? (better is 13.Rc3+–) 13...Na3–/+ (worse is 13...fe6 14.Rc3 d5 15.ed5+/–) 14.ef7 Qf7 (14...Kf7?? 15.Qd5 Ke8 16.Qa8 Kf7 17.Qd5 (17.Na3?! Qc3 18.Bd2 Qh3+/–) 17...Ke8 18.Ba3 (18.Na3?! Qc3 19.Bd2 Qh3+/–) 18...Qf4 19.Qc6 Kf7 20.Qd7 Be7 21.Be6 Kg6 22.Rg1 Kh6 23.Rg4+–) 15.Na3 Nf6 16.f3 Be7 17.Qe2 White prepares the advance e5 17...Kd8 18.Nc4 White intends e5 18...Kc7 19.e5 Ne8 (19...de5 20.Qe5 Kb7–/+) 20.ed6? (better is 20.Be6! Qg6 21.f5=) 20...Nd6–+ (20...Bd6 21.Qe4 Qe7 22.Ne5=) 21.Be6 Qf6 22.Nd6 Bd6 (22...Kd6 23.0–0 Kc7 24.Bb2 Qg6 25.Kh1=) 23.Qe4 Qd8 24.Qc6 Kb8 25.Bd5 Ra7 26.Be4 Qc7 27.Qc7 Rc7 28.Rg1 g6 29.h4 Rf8 30.Rg5 Bf4 (30...Bf4 31.Bf4 Rf4–+) 0–1. jboger (2100) – opportunity (2320), net–chess.com, 2011.

4.e3 Bb7 5.Nf3 e6 (5...Nf6 6.d4=) 6.Bb2 f6 (6...Nf6 7.Be2=) 7.Nh4 (7.bc6 dc6 8.Nd4 Qd6+=) 7...g6 (7...Nh6 8.Bd3=) 8.Bc4 (8.Nf3 Bb4+=) 8...Bg7 (8...d5 9.bc6 Bc6 10.Be2+=) 9.0–0+= d5 (9...Ne7 10.Nf3+=) 10.bc6 Bc6 (10...Nc6 11.Bb5=) 11.Bb3 (11.Be2 Ne7+=) 11...e5 (11...Ne7 12.Nf3=) 12.Nc3 (12.d4 b5+=) 12...f5 (12...Na6 13.d4+=) 13.Nf3+/– e4 14.Nd4 Bd4 15.ed4 Nf6 16.f3 0–0 17.fe4 Ne4 (17...fe4 18.Qe2 Kg7 19.Ba3+/–) 18.Qe1 (18.Ne4 fe4 19.Rf8 Qf8+/–) 18...Nc3 19.Bc3 Re8 20.Qg3 Re4 (better is 20...Qd7!?+/–) 21.Rf5+– Kg7 (21...Na6 22.Raf1 Qd7 23.d3+–) 22.Raf1 Qe7? (22...Ra7+–) 23.Rd5 Bd5 (23...Kh6+–) 24.Bd5 Ra7 (24...Nc6 25.Bc6 Re8 26.Be4+–) 25.Be4 Qe4 (25...Qe8+–) 26.d5 Kg8 (26...Qe5 27.Qe5 Kh6 28.h4 Rd7 29.Qg5) 27.Qb8 1–0. Wall,Bill – Reanna, internet, 2006.

4.e4 Bb7 =.

3.a4 d5

4.d4 e6 5.Nf3 Nf6 6.Bg5 Bb4 7.c3 Bd6 8.Ne5 h6 9.Bh4 g5 10.Bg3 h5 11.h4 (11.Nd3 h4 12.Bd6 cd6=) 11...g4 (11...Ne4!? 12.Bh2 g4=+) 12.Nd2+= Nbd7?? (better is 12...0–0+=) 13.Nc6+– (13...Bg3 14.fg3+–) 1–0. Neresjan – Petrini,Mario, CiF, 1989.

4.d4 Nf6 5.e3 e6 6.Nf3 Bd6 7.Ba3 h6 8.Nbd2 Bb7 9.Be2 Ba3 10.Ra3 0–0 11.Ne5 Qd6 12.Ra1 Nbd7 13.Ng4 Ng4 14.Bg4 f5 15.Be2 e5 16.de5 Qe5 17.0–0 f4 18.ef4 Rf4 19.Nf3 Qf6 20.g3 Rf5 (better is 20...Re4+=) 21.Qd4?? (21.Nh4 Re5=) 21...Re8 (better is 21...Rf3 22.Rfd1 Rc3–+) 22.Qf6= Rf6 (worse is 22...gf6 23.Nd4 Rfe5 24.Bd3+=) 23.Nd4 Re4 24.Rad1 (24.Rfd1!?=) 24...Nc5+= 25.f3 Re3 26.Kf2 Ra3 27.Ra1 Ra4 28.Ra4 Na4 29.c4 Nc5 30.h4 Kf8 31.Ke3 Ke7 32.g4 Ne6 33.Nf5 Kf8 34.Rd1 dc4 35.Bc4 Bc8 (35...g6!? 36.Nh6 Rf3 37.Kd2 Nd4–+) 36.Be6 (36.h5!?=) 36...Be6–/+ 37.Rd8 Kf7 38.Nd4 g5 39.Ne6? (better is 39.h5+=) 39...Re6–+ (39...Ke6?! 40.hg5 hg5 41.Rg8=) 40.Kf2 gh4 41.Rd7 (41.Rc8 Re7–+) 41...Re7 (41...Re7 42.Rd5 a4–+) 0–1. Sapareva,Magdalena (1675) – Artunov,Kirkor (2035), ch–BUL Seniors, 2011.

3.a4 e5

4.Bb2 d6 5.Nf3 Nf6 6.g3 Nbd7 7.Bg2 Bb7 8.0–0 Be7.

4.Bb2 e4!?= 5.Nh3 Nf6 6.g3 Be7 7.Bg2 0–0 8.Nc3 d5.

4.Bb2 f6 5.e4+/– (5.Nc3 d5 6.e4 Ne7 7.ed5 Nd5 8.Qf3 Nb4) 5...Bb7 (5...Ne7 6.Qh5 g6 7.Qf3 Bg7 8.Bc4 d6) 6.Nc3 Bc5 (6...Ne7 7.Bc4+– (7.Qh5 g6 8.Qh4 Bg7) 7...Nc8 8.Qg4 Nd6) 7.Bc4 Ne7 8.Nh3 (8.Qg4 Kf8+/–; 8.Qh5 g6) 8...Bd4 9.Qg4 g6 (9...Kf8 10.Ba3 d6 11.0–0+=) 10.0–0 (better is 10.Ba3+/–) 10...Bc3 (10...Kf8 11.Kh1 d5 12.ed5+/–) 11.Bc3 (better is 11.dc3!? Nc8 12.f3+–) 11...d5+/– 12.f4 (12.ed5 Bd5 13.Bd5 Qd5+/–) 12...dc4 (12...h5 13.Qh4 dc4 14.fe5+–) 13.fe5+= 0–0?? (13...f5 14.ef5 Nf5 15.Rf5 gf5 16.Qh5 Ke7+/–) 14.Qe6+– Kh8 (14...Rf7 15.Ng5!! Bd5 16.Nf7 Be6 17.Nd8 fe5 18.Ne6 Nd7+–) 15.ef6 Nd5 (15...Qd4 16.Bd4 Nf5 17.ef5 c5 18.f7 cd4 19.Qe5) 16.f7 Nc3 17.Qe5 (17.Qe5 Qf6 18.Qf6; 17.dc3?! Qd6 18.Qd6 cd6+=) 1–0. guest569 – guest1075, ICC, 2003.

4.Nc3+= Bb7 5.Nf3 e4 6.Nd4 Nf6 7.e3 c5 8.Nf5 g6.

4.Nc3+= d5 5.Nf3 d4 6.Ne4 f5 7.Ng3 e4 8.Ng1 Nf6.

4.Nc3+= Nf6 5.Nf3 Bd6 6.e3 Bb7 7.Bc4 0–0 8.0–0 Qe7.

4.e4 c5 5.c4 (5...Nf6 6.Nf3=). Conveyor – Ruthless Rook, ChessWorld.net, 2005.

4.Nf3 e4 5.Nd4 Bc5 6.e3 Bd4 7.ed4 Qf6 8.Bb2 Bb7.

3.a4 e6

4.Bb2 Nf6 5.e3 Bb7 6.Nf3 c5 7.Be2 d5 8.c4 Nbd7 9.d3 Bd6 10.0–0 0–0 11.Nbd2 Qc7 12.h3 Rfe8 13.d4 (13.Qc2 Ne5=) 13...Rac8 14.Rc1 Qb8 15.Qb3 (15.cd5 Bd5 16.Nc4 Red8=) 15...Ne4 (15...cd4 16.ed4 Ne4 17.Rc2+=) 16.Rc2 Ndf6 17.Rfc1 Red8 18.Ne4 Ne4 19.Ba1 (19.cd5 Bd5 20.Bc4 Bb7=) 19...cd4 (19...h6 20.Rd1+=) 20.Qb2 (better is 20.Bd4!? Nc5 21.Qa2+=) 20...Nc3–/+ 21.ed4 (21.Nd4 Na4 22.Qb1 Nc5–/+) 21...Ne2–+ 22.Re2 Rc4 23.Rc4 dc4 24.d5 e5 (better is 24...Bf8!? 25.de6 fe6–+) 25.Ne5+= ½–½. Souza,Kim Garcia De (1740) – Pereira,Everaldo Cordeiro (1990), Floripa Open, 2015.

4.Bb2 Nf6 5.e3 Bb7 6.Nf3 Be7 7.Be2 0–0 8.0–0 c6 9.c4 cb5 10.ab5 The passed pawn on a5 will become decisive later 10...d5 11.Nc3 (11.Na3 Nbd7=) 11...Nbd7 12.cd5 Nd5 13.Nd5 Bd5 14.d4 Bb4 15.Ne5 (15.Bd3 Qe7=) 15...Ne5 16.de5 Rc8 17.Bd4 Bc5 18.f4 Rc7 19.Rc1 Bd4 (19...Qc8 20.Qd2+=) 20.ed4 (20.Qd4 Rc1 21.Rc1 Qa8=) 20...Rc1+= 21.Qc1 Qa8 22.Bf3 (22.Rf2!?+=) 22...Bf3–/+ 23.Rf3 Rc8 (23...Qe4!?–/+) 24.Rc3+= The mate threat is Rxc8 24...Rc3 25.Qc3 a4 26.Qc6 Do you see the mate threat? 26...Qb8 (26...Qd8 27.Qc3+=) 27.f5 (27.Qc4 a3 28.Qa4 Qd8=) 27...a3+= 28.fe6 a2 29.ef7 (29.Qc1!? fe6 30.Qa3=) 29...Kf8–/+ 30.Qc3 Qa8 31.Qb4?? (better is 31.Qa1 Qa4 32.e6–/+) 31...Kf7–+ (31...Kf7 32.Qc4 Ke7 33.Qc7 Kf8 34.Qd6 Kg8–+) 0–1. Hirt,Robert – Wartig,Wolfgang, corr DDR–HUN, 1984.

4.Bb2 Nf6 5.Nf3 d6 6.e3 Bb7 7.Be2 Be7 8.0–0 0–0 9.d3 c5 10.c4 Nbd7 11.Qc2 Rc8 12.Nbd2 h6 13.Rad1 Qc7 14.Rfe1 Ng4 15.h3 Nge5 16.Ne5 Ne5 17.f4 Nd7 18.Bf3 Bh4 19.Bb7 Be1 20.Bc8 Bd2 21.Qd2 Rc8 22.Qe2 Nf8 23.e4 e5 24.Qg4 Ne6 25.f5 Ng5 (25...Nd4!?+/–) 26.f6! g6 (26...gf6 27.h4 Combination) 27.Bc1 Nh7 28.Qh4 h5 29.g4 hg4 30.Rf1 (worse is 30.hg4 Qd8 31.g5 Kh8+–) 30...Qd8 31.hg4 g5 32.Bg5 1–0. Maly,Guenther (1740) – Maier,Ralf (2005), remoteschach.de, 2008.

4.e3 d5 5.Nf3 (5.Bb2 Bb7=) 5...Qf6 (5...Nf6 6.Bd3=) 6.Ra2 (6.d4 Bd6+=) 6...Nh6 (6...Nd7 7.Bb2 Qh6 8.Bd3=) 7.Bb2+= Qf5 (7...Qg6 8.Ne5 Qf6 9.Bd3+=) 8.Bd3 (8.Be2 Nd7+=) 8...Qh5 9.0–0 (9.Be2 f6+=) 9...Bd6 10.h3 (10.Nc3 f6+=) 10...Nf5 (10...Bb7 11.Nc3= (11.Bg7? Rg8–+)) 11.c4 (11.e4 Ne7 12.e5+= (< 12.Bg7 Rg8 13.e5 Rg7 14.ed6 Qh3–+)) 11...e5? (better is 11...Bb7=) 12.Ne5+– Qd1 13.Rd1 f6 14.Nf3 Bc5? (14...Be6 15.Rc1 Ne7+–) 15.cd5 0–0 16.Ba3 (16.Bf5 Bf5 17.d3 Bg6+–) 16...Bd6 17.Bd6 cd6 18.Nc3 g5 19.Ne2 h5 20.Nfd4 Nh4 21.g3 Re8 22.gh4 Bh3 23.Bf5 g4 24.Ne6 Nd7 25.Nc7 Re5 26.Be6 Re6 27.de6 Rc8 28.ed7 Rd8 29.Nd5 Kf7 30.Nb6 Rb8 31.Rc1 Ke7 32.Rc8 Rc8 33.dc8Q Kf7 34.Qd7 Kg6 35.Nf4 (35...Kh6 36.Qf7 Bg2 37.Qg6#) 1–0. kostovist – jordan2delta, internet, 2006.

4.e3 Nf6 5.g3 (5.Bb2 Bb7=) 5...Bc5 (5...Bb7 6.Nf3=+) 6.Bg2 (6.Qf3 d5=+) 6...d5 7.d4 (7.Ba3 Ba3 8.Na3 0–0=+) 7...Bb4= 8.c3 Bd6 9.f4 (9.c4 0–0=) 9...h5 (9...0–0 10.c4–/+) 10.Qd3 h4 11.e4 (11.c4 hg3 12.hg3 Rh1 13.Bh1 c6=) 11...de4 12.Be4 Ng4?? (better is 12...Ne4 13.Qe4 Ra7=+) 13.Ba8+– hg3 (13...Nf6 14.Ne2+–) 14.hg3 Rh1 15.Bh1 g6 16.Qf3 f5 17.Qa8 Nd7 18.Bc6 Kf7 19.Bd7 Qd7 20.Qc6 Qd8 21.Nd2 g5 22.Nc4 gf4 23.Nd6 cd6 (24.Bf4 e5 25.de5 de5+–). riverborne – bigsteel, Caissa.com, 2004.

4.e4 Nf6 5.e5 Ne4 =.

4.Nf3 Be7 5.Bb2 Bf6 6.d4 Ne7 7.g3 0–0 8.Bg2 Bb7 9.0–0 c6 10.c4 d5 11.Na3 c5 12.e3 cd4 13.ed4 dc4 14.Nc4 Bd5 15.Nce5 Be5 16.Ne5 Bg2 17.Kg2 Qc7 18.Rc1 Qb7 19.Kg1 Nd7 20.Nc6 Nf6 21.Re1 Ned5 22.h4 h6 23.Re5 Rad8 24.Qf3 Qd7 25.g4 Qd6 26.g5+/– Nd7 27.Re4 hg5 28.hg5 Ne7?? 29.Rh4 Nc6?? 30.bc6 Rc8 31.Qh5 f6 32.g6 (32.g6 Qh2 33.Rh2 Rc6 34.Qh7#) 1–0. sacaniev – politis, kurnik, 2012.

4.Nf3 Nf6 5.g3 Bb7 6.Bg2 Be7 7.0–0 0–0 8.c4 c6 9.Bb2 cb5 10.cb5 d5 11.Ne5 Nbd7 12.Na3 (12.Nc6 Bc6 13.bc6 Nc5=) 12...Ne5=+ 13.Be5 Rc8 14.Nc2 Bd6 15.Bc3 (15.Bd6 Qd6 16.d4 Rc3=+) 15...g6 (15...Ne4 16.Bd4=+) 16.Nd4 (16.f4 Ne4 17.Bd4 Rc4=) 16...Qd7 (16...Ne4 17.Bb2=+) 17.Rc1 (17.Nf5 Rc3 18.Nd6 Rc7 19.Nb7 Rb7=) 17...e5=+ 18.Nb3 d4 19.Bb2 Bg2 20.Kg2 Qb7 21.Kg1 Rc1 22.Qc1 Rc8 23.Qb1 Rc7 24.d3 Qc8 25.Nd2 Bb4 26.f4?? Bd2–+ 27.fe5 Be3 28.Kg2 Qb7 29.Kh3 Nd5 30.Ba3 Nc3 31.Qb3 Qc8 32.Kg2 Qb7 33.Rf3?? Nd5 34.Bd6 Rc3 35.Qa2 Bh6 36.e6? fe6 37.Qa1 Ne3 38.Kg1 Nf5 39.Bf4 Qc8 40.Qa2 Qd7 41.Qd2 Bg7 42.g4 e5 43.gf5 ef4 44.Qf4 Qf5 45.Qb8 Rc8 46.Qb6 Qg4 47.Kf2 Qh4 48.Kg2 Re8 49.Rf2 Bh6 50.Qc6 Qg4 51.Kh1 Rc8 52.Qd5 Kh8 53.Qg2 Rc1 ½–½. yaunootz – fantom, internet, 2006.

3.a4 Nf6

4.Bb2 e6 5.e3 Bb7 6.Nf3 Be7 7.Be2 d5 8.d3 0–0 9.0–0 Nbd7 10.Nbd2 Rc8 11.c4 Re8 12.Nd4 c5 13.N4b3 (13.bc6 Bc6 14.Nc6 Rc6=) 13...e5 (13...Qc7 14.Qc2+=) 14.cd5 Nd5 15.Nc4 Bf8 (15...Qc7 16.Bg4 N5f6 17.Bf3=) 16.Bg4 N5f6 17.Bd7 Nd7 18.Nbd2 Qc7 19.e4 Rcd8 20.Qf3 Re6 21.Rad1 Bc8 22.Qe3 Be7 23.f4 (23.Qg3 Qb8=) 23...ef4 24.Qf4 (24.Rf4? Bg5 25.g3 Nf8–+) 24...Qf4 25.Rf4 Bg5 26.Rg4 Bd2?? (better is 26...Bf6=) 27.Rg7+– (27.Nd2?! Ne5 28.Rg3 A) 28...Nd3? 29.Nc4+– (29.Rg7?! Kf8 30.Ba1 Rd7+=; 29.Bg7?! Rg6 30.Bf6 Rd6 31.Rg6 hg6+=); B) 28...h5 29.Be5 Re5=) 27...Kf8 28.Rd2 Rh6 (28...Nf6 29.Bf6 Rf6 30.Rh7+–) 29.Rg3 (29.Rf2 f6 30.Rd7 Rd7 31.Nb6 Rd3 32.Nc8 Rd8+–) 29...Rg6 (29...Ke7 30.Rf3+–) 30.Rf3 (30.Rg6 hg6 31.d4 Ke8+–) 30...Ke7 31.Rdf2 Rf8 32.Ba3 (32.d4 Rg4 33.Rf4 Rf4 34.Rf4 Bb7+–) 32...Bb7 33.Rf4 f6? (33...Re6 34.d4 Be4 35.Nb6 Nb6 36.Bc5 Kd8 37.Bf8 Na4 38.Rf7+–) 34.Bb2 (better is 34.Nb6 Rg5 35.Nc4+–) 34...Ke6 35.Bc3 Rfg8 36.Nb6! Nb6 37.Rf6 Ke7 (37...Kd7 38.Rf7 Kc8 39.Ba5 Na4 40.Rh7 Rd6+–) 38.Rf7 Ke6 39.Rb7 Na4 40.Ba5 Ke5 (40...Ra8 41.Be1 Rf6 42.Rh7 Rf2 43.Bf2 Ra5+–) 41.Re7 Kd4 42.Rd7 (42.Rd7 Ke5 43.Rff7+–) 1–0. Olsen,Birger – Njaa,John Olav, Vadsosjakken–B, 2004.

4.Bb2 e6 5.e3 d5 6.f4 c5 7.bc6 Nc6 8.Bb5 Bb7 9.Nf3 Bd6 10.Ne5 Qc7 11.0–0 0–0 12.Nc3 Ne5 13.fe5 Be5 14.d4 Bh2 15.Kh1 Bd6 16.Ne2 Ne4 17.Rf3 f5 18.Nf4 Bf4 19.Rf4 Rf6 20.Qf3 Rh6 0–1. jura1946 – abiniol, kurnik, 2012.

4.Nf3 =.

3.a4 h5

4.c4 Bb7 5.d4 (5.Nf3 e6 (5...Nf6 6.d4 e6 7.e3 h4 8.Ba3 Ne4 9.Bf8=) 6.d4 Bb4 7.Bd2 Bf3 8.ef3 Qf6 9.Bb4=; 5.Nc3 e6 (5...Nf6 6.Nf3 e6 7.Bb2 Bb4 8.e3 h4 9.Na2=) 6.e4 Bb4 7.Bb2 Nf6 8.f3 0–0 9.Na2=; 5.Bb2 e6 (5...Nf6 6.Nf3 e6 7.e3 Bb4 8.Be2 h4 9.h3+=) 6.Nf3 Nf6 7.e3 Be7 8.Bf6 Bf6 9.d4=) 5...Nf6 (5...e6 6.Nf3 h4 7.e3 Qf6 8.Be2 h3 9.g3=) 6.Nf3 e6 7.e3 h4 8.Ba3 Ba3 9.Na3 =.

4.c4 d6 5.e4 (5.Nf3 e5 (5...Nf6 6.d4 Bb7 7.e3 e6 8.Be2 Be7 9.0–0+=) 6.Nc3 Nf6 7.e4 h4 8.d4 ed4 9.Qd4+=; 5.Nc3 e5 (5...Nf6 6.Nf3 e5 7.e4 h4 8.d4 ed4 9.Qd4+=) 6.Nf3 Nf6 7.e4 h4 8.d4 ed4 9.Qd4+=; 5.d4 e5 (5...Nf6 6.Nf3 Bf5 7.Nc3 e6 8.d5 e5 9.Ng5+=) 6.de5 de5 7.Qd8 Kd8 8.Nf3 Bd6 9.Bb2+=) 5...e5 (5...Nf6 6.Nc3 e5 7.Nf3 h4 8.d4 ed4 9.Qd4+=) 6.Bb2 (6.Nf3 Nf6 7.Nc3 h4 8.d4 ed4 9.Qd4+=) 6...g6 (6...Nf6 7.Nc3 Be7 8.Nf3 Bb7 9.d4+=) 7.Nf3 (7.d4 Bg7 8.de5 Be5 9.Be5+/–) 7...Qe7 (7...Bg7 8.Be2 Nf6 9.Nc3+=) 8.Be2 (8.d4 ed4 9.Qd4+=) 8...Nh6 (8...Nf6 9.Nc3+=) 9.d3 (9.d4+/–) 9...f5 10.Qb3 f4 (10...Nd7 11.Nc3+=) 11.Nbd2 (better is 11.Nc3!? Be6 12.Nd5 Bd5 13.cd5+/– (worse is 13.ed5 Nd7+=)) 11...g5= 12.Qc3 g4 13.Ne5 de5 (13...Qe5? 14.Qc2 Qe7 15.Bh8+–) 14.Qe5 Qe5 15.Be5 Rh7 16.Bf4 Bd6 17.Bd6 cd6 18.d4 Nd7 19.d5 (better is 19.h3!? Nf6 20.hg4 hg4 21.Rc1+/–) 19...Nc5= 20.0–0 Ng8 21.f3 Bd7 22.fg4 Bg4 23.Bg4 hg4 24.Rf4 Nh6 25.Rf6 (25.h4 Rf7 26.Rf2 Raa7+=) 25...0–0–0 (25...Ke7 26.Rf4 Nd3–/+) 26.e5+= de5 27.Rb6 Nf5 28.Rc6 Rc7 29.Rc7 Kc7 30.Kf2 (30.Re1 Re8 (worse is 30...Na4 31.Re5 Rf8 32.Nb3+/–) 31.Ne4 Na4+=) 30...Nd6 31.Kg3 Nce4 (better is 31...Rf8 32.Kg4 Rf2+=) 32.Ne4+/– Ne4 33.Kg4 Rf8 34.g3 Rf2 (34...Kd6 35.Ra2+/–) 35.h4 (better is 35.Re1 Nc5 36.Re5+–) 35...Rg2?? (35...Rc2 36.Kf5 Ng3 37.Ke6+/–) 36.Ra3 (better is 36.Kf3 Rg3 37.Ke4 Rg4 38.Ke5 Rc4 39.Rh1 Ra4 40.h5+–) 36...Rc2 37.Kf5 Nc5 (37...Nd6 38.Ke6 Nc4 39.Rd3+–) 38.Ke5 (38.h5!? Nd7+–) 38...Rc4 39.d6 Kd7 40.Kd5 (better is 40.Rf3 Ra4 41.Kd5+–) 40...Ra4? (40...Rc1 41.Ra2+/–) 41.Ra4 (better is 41.Re3 Nb7 42.Re7 Kc8 43.d7 Kc7 44.d8Q Kd8 45.Rb7 Rg4+–) 41...Na4 42.g4?? (better is 42.h5!? Nc3 43.Kc4+–) 42...Nc3 (42...Nb6 43.Kc5 Na4 44.Kd4 Kd6 45.g5+=) 43.Kc5 (better is 43.Kc4 Ne4 44.h5 Nd6 45.Kb3+=) 43...Ke6?? (better is 43...Ne4 44.Kc4 Nd6 45.Kc5 Ne4 46.Kd5 Nf6 47.Kd4 Ng4+=) 44.b6+– Na4 45.Kc6 Nb6 46.Kb6 a4 (46...Kd6 47.Ka5 Kd7+–) 47.Kc7 (better is 47.Kc6 Ke5 48.d7+–) 47...a3 48.d7 a2 49.d8Q a1Q 50.Qd7 Ke5 1–0. delightful_porridge – 2buddies, ChessWorld.net, 2016.

4.c4 e5 5.e3 (5.Nc3 Nf6 (5...Bb7 6.Bb2 Bc5 7.e3 Nf6 8.Nf3 e4 9.Ng5=) 6.Nf3 e4 7.Ng5 Bb7 8.Qc2 Qe7 9.d3=; 5.Nf3 e4 6.Nd4 Nf6 7.Bb2 Bb7 8.e3 h4 9.Be2=; 5.Bb2 e4 (5...f6 6.e4 Bb7 7.Nc3 Bb4 8.Nd5 Ne7 9.Be2+=) 6.Nc3 Nf6 7.f3 ef3 8.Nf3 Bb7 9.e3=) 5...Nf6 (5...Bb4 6.Bb2 d6 7.f4 Bb7 8.Nf3 e4 9.Nd4=) 6.Bb2 e4 7.Nc3 Bb4 8.Rc1 Bb7 9.Nh3 =.

4.c4 Nf6 5.Bb2 (5.Nf3 e6 (5...Bb7 6.d4 e6 7.e3 h4 8.Ba3 Bb4 9.Bb4=) 6.d4 Bb7 7.e3 h4 8.Ba3 Ne4 9.Bf8=; 5.Nc3 e5 (5...Bb7 6.Nf3 e6 7.Bb2 Bb4 8.e3 Be7 9.Be2+=) 6.Nf3 e4 7.Ng5 Bb7 8.Qc2 Qe7 9.d3=; 5.d4 e6 (5...Bb7 6.Nf3 e6 7.e3 h4 8.Ba3 Bb4 9.Bb4=) 6.Nf3 Bb7 7.e3 h4 8.Ba3 Ba3 9.Na3=) 5...Bb7 (5...e6 6.Nf3 Bb7 7.e3 Bb4 8.Be2 h4 9.h3+=) 6.Nf3 e6 7.e3 Bb4 8.Be2 h4 9.h3 +=.

3.Bb2 a4

4.a3 Ra5 5.e3 c5 (5...Nf6 6.Nf3+=) 6.c4 Ra8 (6...d5 7.d4 cd4 8.Bd4 dc4 9.Bc4+=) 7.Nc3+/– d6 8.Na4 h5 (8...Bb7 9.Nf3+/–) 9.Nc3 Bg4 10.Be2 Be2 (10...Nf6 11.Nf3+–) 11.Nge2 e5 12.0–0 h4 13.h3 d5 (better is 13...Nf6+–) 14.Nd5 Ne7 15.e4 (15.Ne7!? Qe7 16.d4 Qe6+–) 15...Nd5 16.ed5 Nd7 17.f4 e4 (17...Bd6+–) 18.Nc3 f5 19.d3 g6 (19...e3 20.Qe2 Be7 21.Qe3+–) 20.de4 fe4 (20...Bg7 21.e5 g5+–) 21.Ne4 Rh5 (21...Rh7 22.Qg4 Qe7 23.Rae1+–) 22.Ng5 (better is 22.Qg4 Qe7 23.Qg6 Qf7+–) 22...Nf6 23.Re1 Be7 24.Bf6 Qd6 25.Be7 Qf4 26.Bd6 Kd7 27.Bf4 Rg5 28.Bg5 (28.Bg5 Rf8 29.Qg4 Rf5 30.d6 Kc8 31.Re8 Kd7 32.Rd8 Ke6 33.Re1 Kf7 34.Re7; 28.Qe2 Re5 29.Qe5 Ra3 30.Qe8) 1–0. Fournier,Frederic (2070) – profilactico, Active, 2004.

4.a3 d5 5.Nf3 +=.

4.e3 c6 5.c4 a3 6.Ba3 c5 7.Bb2 d6 8.a4 e5 9.Nf3 Nf6 10.Be2 Bg4 11.h3 Bh5 12.0–0 Nbd7 13.d4 Be7 14.de5 de5 15.Ne5 Be2 16.Qe2 Ne5 17.Be5 0–0 18.Rd1 Qc8 19.Nc3 Rd8 20.Rd8 Qd8 21.Rd1 Qc8 22.Qf3 g6 23.Bf6 Bf6 24.Qf6 Qe6 25.Qe6 fe6 26.Rd6 Kf7 27.Rb6 Kf6 28.Rc6 Ke5 29.Rc5 Kd6 30.Rc6 Kd7 31.Ra6 Rc8 32.Ra7 Kd6 33.Ne4 Ke5 34.Nd2 h6 35.a5 Kd6 36.a6 Rb8 37.Rb7 Ra8 38.a7 Kc5 39.b6 Kc6 40.Rb8 1–0. ourang – galusiowaty, kurnik, 2012.

4.e4 e6 5.d4 Bb7 6.Bd3 Qg5 7.g3 f5 8.f4 Qg6 9.ef5 ef5 10.Nf3 Qe6 11.Kf2 Qd5 12.c4+/– Qf3 13.Qf3 Bf3 14.Kf3 Ne7 15.Re1 Kf7 16.a3 c6 17.Nc3 g6 18.c5 bc5 19.dc5 cb5?? 20.Nb5 Nbc6 21.Nd6 (21...Kg8 22.Bc4 Nd5 23.Bd5#) 1–0. Fischer,A – Wartig,Wolfgang, corr SOK–89–30, 1989.

3.Bb2 Bb7

4.a4 (--> 3.a4 Bb7 4.Bb2).

4.c4 c5 5.e3 d5 6.f4 dc4 7.Bc4?? (7.Nf3 e6=) 7...e6 (better is 7...Bg2 8.Bf7 Kf7 9.Qh5 g6–+) 8.Nf3= Nf6 9.0–0 Be7 10.d3 0–0 11.Qb3 Nd5 12.Re1 Nd7 13.Nbd2 Rc8 14.g3 N7f6 15.e4 Nc7 16.h3 Qd7 17.Re2 Rfd8 (17...Rcd8 18.Ne5 Qe8 19.f5=) 18.Rf2 Bf8 19.Ne5 White prepares f5 19...Qe8 20.g4 White prepares f5 (20.f5!?+=) 20...Nd7 21.f5 Ne5 22.Be5 Kh8 23.g5 ef5 24.Rf5+= f6 25.gf6+– gf6? 26.Bf6 Bg7 27.Qb2 Qg6 28.Kh2 Ne8?? 29.Bg7 Ng7 30.Rg1 Qd6 31.Kh1 The mate threat is Qxg7 31...Qd7 32.Rfg5 Qh3. carocan (1770) – herros (1720), kurnik, 2011.

4.c4 d5 5.cd5+= Qd5 6.Nc3 Qf5 7.e3 e5 8.Nge2 (8.d4 Nd7+=) 8...Nf6= 9.Ng3 Qe6 10.Qc2 Nbd7 11.Nce4 Nd5 (11...Ne4 12.Ne4 Rc8 13.Ng5=+) 12.Bc4 0–0–0 (better is 12...c6!?=) 13.Rc1+/– Nc5 (13...Nb4 14.Be6 Nc2 15.Rc2 fe6 16.Ng5 Bg2 17.Rg1+/– (17.Ne6?! Bh1 18.Nd8 Bd5=)) 14.0–0 (14.Nc5 Bc5 15.Ne4 Kd7+–) 14...Qd7 (14...Kb8 15.d4 ed4 16.Bd4 Ne4 A) < 17.Ne4 Nb4 18.Be6 Nc2 19.Rc2 Be4–/+ (< 19...fe6 20.Ng5+/–); B) 17.Qe4 Qe4 18.Ne4+=) 15.Nc5 (15.Be5 Ne4 16.Ne4 Nb4+–) 15...Bc5 16.Be5 (better is 16.Ne4 Bd6 17.Nd6 Qd6 18.Qf5 Qd7 19.Qe5+–) 16...f6 17.d4 Ba3 (17...Nb4 18.Qc3 fe5 19.dc5 bc5 20.Qe5+–) 18.Bd5 Bc1 (18...Bd5 19.Bc7 Bc1 20.Bb6 Kb8 21.Bd8 Rd8 22.Rc1 Rc8 23.Qc8 Qc8 24.Rc8 Kc8+–) 19.Be6!! (19.Rc1 fe5 20.Be6 Kb8 21.Bd7 Rd7+–; 19.Qc1 Bd5 (19...fe5?! 20.Bb7 Kb7 21.de5=+) 20.Bf4 g5–+ (20...Ba2 21.Qc2+=)) 19...Kb8 (19...Qe6 20.Qc7) 20.Bd7 (20...fe5 21.Bc6 Bc6 22.Rc1 Bb5 23.Qc7 Ka8 24.Qb6+–) 1–0. Mroz,Antoni – Szyszka,Jerzy, corr Poland, 1990.

4.c4 d6 5.Nf3 e5 6.e3 Nd7 7.Be2 Ngf6 8.0–0 Be7 9.Nc3 0–0 10.Qc2 g6 (10...Re8 11.d4+=) 11.d4+/– e4 (11...Re8!?+/–) 12.Nd2+– Re8 13.d5 Bf8 14.Nce4 Bg7 15.Nf6 Nf6 16.Nf3 Qe7 17.Nd4 Nd7 18.Bf3 (18.Rae1 Ne5+/–) 18...Nc5 19.Nb3 Bb2 20.Qb2 Nd3 21.Qc3 Ne5 22.Be2 f5 23.Nd4 Nd7 24.Bd3 Nc5 25.Bc2 Qe5 26.Qd2 Rad8 27.Rae1 Re7 28.Nb3 Ne4 29.Be4 fe4 30.Qd4 Rf8 31.Qe5 Re5 32.Nd4 Bc8 33.Nc6 Ree8 34.f4 ef3 35.Rf3 Bg4 Black fights for the Initiative 36.Rf8 Kf8 37.h3 Bf5 38.Kf2 Bd3 39.Rc1 g5 40.Ke1 Bg6 41.Nd4 Re3= 42.Kd2?? Rd3–+ 43.Ke2 Rd4 44.Rf1 Kg7 45.Rc1 h5 Black plans g4 46.Ke3 Rd3 47.Ke2 Ra3 48.h4 Ra2 49.Kf3 g4 50.Kg3 Be4 51.Re1 Bd3 52.Re7 Kf6 53.Rc7 Ra3 54.Kf4 Rc3 55.Ke3 Rc4 56.Rd7 Bf5 57.Rd6 Ke5 58.Rb6 Kd5 59.Rh6 Ke5 60.Rh5 Rc3 61.Kd2 Rb3 62.Rg5 a4 63.h5 a3 64.Rg7 a2 65.Ra7 Bb1 66.h6 Rb2 67.Kc1 Rg2 68.h7 Rh2 69.b6 Kd6 70.Ra4 Kc6 71.Rc4 Kb6 72.Ra4 Rh7 73.Ra3 Rh1 74.Kb2 Kb5 75.Rb3 Ka4 76.Ra3 (76.Ra3 Kb4 77.Rg3–+). orangutanb4 (2020) – kapibara8 (1740), kurnik, 2011.

4.c4 e6 5.Nc3 Nf6 6.e3 g6 (6...Bd6!?=) 7.Nf3+= Bg7 8.d4 0–0 9.Bd3 d5 10.c5 (10.0–0!?+=) 10...bc5= 11.dc5 c6 12.a4 (12.Rc1 Qe7+=) 12...Re8 (12...Nfd7 13.Rb1+=) 13.0–0 (13.Ne2 Nbd7 14.Qc2 e5 15.bc6 Bc6–/+) 13...Bf8 (13...Nfd7 14.Rb1+=) 14.Ba3 Nbd7 15.Nd4 Nc5 16.bc6 Ba6 17.Bb5 Qc7 18.Qc2 e5 19.Nb3 (19.Bc5!? Bc5 20.Nd5 Nd5 21.Qc5 ed4 22.Qd5 de3 23.fe3 Re3 24.Qd7 Qd7 25.cd7 Bb5 26.ab5+/–) 19...Nb3= 20.Qb3 Red8 (20...Ba3 21.Ra3 Red8 22.Rd1+=) 21.Bf8 Kf8 22.e4 (22.Rad1!? Qd6 23.Rc1+/–) 22...de4= 23.Rfe1 Rab8? (better is 23...Kg7=) 24.Qa3+– Kg7 25.Ba6 Qc6 26.Bb5 Qb6 (26...Qd6 27.Qd6 Rd6 28.Ne4 Ne4 29.Re4+–) 27.Ne4 Ng4 (27...Ne4 28.Re4 Rd2 29.Rf1+–) 28.h3 f5 (28...Nh6+–) 29.hg4 fe4 (29...Rb7 30.gf5 gf5+–) 30.Qe7 Kh6 31.Re4 g5+– 32.Re5 Rg8 33.Re6 Rg6 34.Rb6 Rbb6 35.g3 1–0. tarzan1990 – mikebaldini (1615), gameknot.com, 2015.

4.c4 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 b6 4.c4 Bb7).

4.d3 c6 5.c4 =.

4.d3 d6 5.e4 e5 6.Nf3 Nd7 7.Be2 Be7 8.0–0 (8.Nc3 Ngf6=) 8...Ngf6 9.a4 (9.Nh4 g6=) 9...0–0 10.Nbd2 h6 (10...Rc8 11.Re1=) 11.Nc4 (11.Re1 Nc5=) 11...Nh7 (11...Nc5 12.Qd2=) 12.Ne3 Nc5 13.c4 Ne6 (13...Nf6 14.Qc2=) 14.g3 (14.Qc2 Nhg5+=) 14...Nhg5 (14...Nf6 15.Nd2=) 15.Nd5 (15.Ng5 Bg5 16.Nd5 Rc8+=) 15...Nf3 (15...f5 16.Ng5 Ng5 17.f4 ef4 A) < 18.Ne7 Qe7 19.h4 Ne6–+ (19...fe4?! 20.hg5 f3 21.de4 fe2 22.Qe2–+); B) 18.gf4=) 16.Bf3+= Bd5 (16...Ra7 17.Bg2+=) 17.cd5+/– Ng5 (17...Nc5 18.Bg4+/–) 18.Bg2 f5 (18...Nh7 19.Rc1+/–) 19.f4 ef4 20.gf4 Nh7 21.e5 de5 22.fe5 f4 (22...Bb4!?+/–) 23.Qg4+– g5?? (better is 23...Bg5+–) 24.Qe6 Kh8 25.Qh6 Rg8 26.Be4 Rg7 27.d6 cd6 28.ed6 Bf6 29.Bf6 Qf6 30.Qf6 Nf6 31.Ba8 Rd7 32.h4! Rd6 33.hg5 (33...Nh7 34.Rf4 Ng5 35.Rg4+–) 1–0. Fredek (2065) – Guest1380855, Freundschaftspartie, 5m + 0s, 2006.

4.d3 e6 5.e4 Nf6 6.Nf3 Be7 7.Be2 0–0 8.0–0 Ng4 (8...c6 9.c4=) 9.h3 Nh6 (9...Nf6 10.c4+=) 10.c4 (10.Bc1 c6+=) 10...Bf6 (10...f5 11.Nc3=) 11.e5 (11.Nc3 d5+=) 11...Be7 12.Nbd2 d6 13.d4 Nd7 14.Qc2 de5 15.Ne5 Ne5 16.de5 Bc5 (16...Nf5 17.Rfd1+=) 17.Bf3 (17.Bd3 Nf5+=) 17...Bf3 18.Nf3 Qe8 19.Qe4 (19.Bd4 Qe7+=) 19...Nf5= 20.g4?? (20.Rfd1 Rd8=) 20...Ne7?? (better is 20...Ng3! 21.Qb1 Nf1–+) 21.Rad1 c6 (21...Rd8 22.Rd8 Qd8 23.Bd4+=) 22.a4 (22.Ng5 g6 23.Qf3 cb5+=) 22...cb5= 23.ab5 (23.cb5 Rd8=) 23...Ng6 (23...a4 24.Bd4=+) 24.h4 (24.Bd4 Qe7=) 24...Rd8 (24...Qe7!? 25.h5 Nh4=+) 25.h5+= Ne7? (25...Rd1 26.Rd1 Ne7 27.Ng5+=) 26.Bc1?? (better is 26.Ng5 g6 27.Bd4 Bd4 28.Rd4=) 26...Rd1= 27.Rd1 h6 28.Be3 Qc8 29.g5 (29.Bc5 Qc5 30.g5 hg5 31.Ng5 Nf5=) 29...Nf5 (29...Be3 30.Qe3 Qc4 31.gh6 Qg4 32.Kf1–/+) 30.gh6 (30.Bc5 Qc5 31.Qc6 Qc6 32.bc6 Rc8–/+) 30...Nh6 (30...Ne3 31.h7 Kh8 32.fe3=) 31.Bc5+= Qc5 32.Rd6 Nf5 (32...Qc7 33.Qc6 Qe7 34.Qb6+/–) 33.Rc6 Qb4 34.Rb6 Rd8 35.Ra6 Rd1 (35...a4!?+–) 36.Kg2 a4?? (36...Qe7 37.Ra5 Rd7+–) 37.Ra8 Kh7 38.Ng5 Kh6 39.Nf7 Kh5 40.Qf4 Kg6 41.Nh8 Kh7+– 42.Nf7 Qe7?? 43.Ng5 Kg6 44.Nf3 Kf7 (44...Qb7 45.Qg4 Kh7 46.Rf8+– (46.Ra4?! Kg8+–)) 45.Qg4 (< 45.Ra4 Qb7 46.Qg4 Rd3+–) 45...g6 (45...Rd8 46.Ng5 Qg5 47.Qg5 Ra8 48.Qh5 Ke7+–) 46.Rh8 Kg7 47.Ng5 (better is 47.Qh3 Nh4 48.Rh4 (48.Nh4 Qg5 49.Qg3 Qg3 50.fg3 Kh8 51.Ng6 Kg7=) 48...Qh4 49.Qh4+–) 47...Kh8 (47...Qb7 48.Qf3 Qf3 49.Nf3 Kh8 50.Ng5–+) 48.Qd1 Qg5 49.Kf1 Qh5 (49...a3 50.Qa4 Qc1 51.Kg2–+) 50.Qd8 Kg7 51.Qd7 (51...Kh6 52.Ke1–/+). Fredek (2090) – Guest354785, Freundschaftspartie, 5m + 0s, 2005.

4.d4 Nf6 5.c4 a4 (5...e6 6.Nc3=) 6.a3 e6 7.Nc3 d5 8.Nf3 c5 9.e3 Be7 10.Be2 (10.Na4 0–0+=) 10...0–0 11.0–0 Nbd7 12.Na4 cd4 13.ed4 (13.Nd4!? Bd6 14.f4+/–) 13...dc4= 14.Nc3 (better is 14.Nd2=) 14...Bc5?? (better is 14...Qc7+=) 15.Qc2?? (better is 15.dc5 Nc5 16.Ne5+–) 15…Rc8?? (15...Rc8 16.dc5 Rc5+–; better is 15...Bd6+=). Degner – Wartig,Wolfgang, (year?).

4.e3 c5 (--> 3.e3 Bb7 4.Bb2 c5).

4.e3 c6 (--> 3.e3 Bb7 4.Bb2 c6).

4.e3 d5 (--> 3.e3 Bb7 4.Bb2 d5).

4.e3 d6 (--> 3.e3 Bb7 4.Bb2 d6).

4.e3 e6 (--> 3.e3 Bb7 4.Bb2 e6).

4.f3 Nf6 5.e4 d6 6.d4 g6 (6...e6 7.Nh3+=) 7.d5 (7.Bd3 Bg7+=) 7...Bg7+= 8.g4 (8.Bc4 0–0+=) 8...0–0 9.Bc4 Nbd7 10.Ne2 Nc5 11.a4 Ncd7 12.Nd2 (12.h4 Rc8=) 12...Ne5 13.Bb3 Rc8 14.0–0 Re8 15.h3 e6 16.de6 fe6 17.Nf4 d5? (better is 17...Qd7+=) 18.ed5?? (18.Be5 Ng4 19.fg4 (19.hg4?! Be5 20.Ng2 Bd4 21.Kh2 Ba1 22.Qa1 Qg5+=) 19...Be5 20.Rb1+/–) 18...ed5 19.Nb1 (19.Re1!? Nf7 20.Re8 Qe8 21.Qe2=+) 19...Kh8 20.Nd5 Bd5 (20...Nd5 21.Bd5 Bd5 22.Nc3–+) 21.c4 Bc4 22.Qd8 Rcd8 23.Bc4 Nc4 24.Nc3 (24.Bc3–+) 24...Nb2 25.Rab1 (25.g5 Nd7 26.Ne4 Nd3–+) 25...Nc4 (better is 25...Ng4 26.fg4 Bc3 27.Rf7–+) 26.Ne2 (26.g5 Nd5 27.Ne4 Bd4 28.Kh2 Rf8–+) 26...Nd5 (better is 26...Re2 27.Rf2 Rf2 28.Kf2 Rd2 29.Kg3–+) 27.Ng3 (27.Rbe1 Nd2 28.Rf2 Nf4 29.Nf4 Re1 30.Kg2 Rd4–+) 27...Nf4 (27...Nd2 28.Ne4 Nb1 29.Rb1–+) 28.h4 (28.Ne4 Nd2 29.Nd2 Rd2–+) 28...Ne2 (better is 28...Nd2 29.Rbc1–+) 29.Ne2 Re2 30.Rfe1 Rdd2 31.Re2 Re2 32.Rc1 (32.Kf1 Ra2 33.Re1 Be5–+) 32...Nd6 (better is 32...Nd2 33.Rc4 Nc4–+) 33.Rc7 Bd4 34.Kf1 Rf2 35.Ke1 Rf3 36.Rd7 Bc5 37.Rd8 (37.h5 gh5 38.gh5 Rh3–+) 37...Kg7 38.h5 (38.Rd7 Nf7 39.h5 Rf4 40.hg6 Kg6–+) 38...gh5 39.gh5 (39.Rd7 Kh6 40.g5 Kg5–+) 39...Kh6 40.Ke2 Rf5 (40...Rf4 41.Rg8–+) 41.Kd3 (41.Ke1 Rh5 42.Rf8 Rh1 43.Rf1 Rh4–+) 41...Rh5 42.Kc3 Rg5 43.Kd3 (43.Kb2 Rg4–+) 43...Kg6 (better is 43...Rg4 44.Ra8–+) 44.Rg8 Kf5 (44...Kh5 45.Rg5 Kg5 46.Ke2–+) 45.Rh8 (45.Rf8 Ke5–+) 45...h5 46.Ke2 (46.Rf8 Kg4–+) 46...Kg4 47.Kf1 (47.Kd3 Rd5 48.Ke2 Re5 49.Kd1 Re4 50.Rg8 Kh4–+) 47...h4 (47...Kf3 48.Ke1 Nc4 49.Rg8 Rg8 50.Kd1 Rg2 51.Kc1 Be3 52.Kb1 Na3 53.Ka1 Bd4) 48.Kg2 Ne4 49.Re8 (49.Kh2–+) 49...h3 50.Kh2 (50.Kh1 Nf2 51.Kh2 Bd6 52.Kg1 Kf3 53.Kf1 Rg1 54.Kg1 h2 55.Kf1 h1Q) 50...Bd6 51.Kg1 (51.Kh1 Nf2 52.Kg1 Kf3 53.Kf1 Rg1 54.Kg1 h2 55.Kf1 h1Q) 51...Kf3 52.Kf1 h2 53.Rh8 (53.Rf8 Bf8 54.Ke1 h1Q) 53…Rg1 0–1. MasterofDisaster – baretti, Live Game Caissa's Web, 2004.

4.Nf3 d6 5.d3 e5 6.e4 Nd7 7.Be2 Ngf6 8.0–0 g6 (8...Be7 9.Nfd2=) 9.c4 Bg7 10.Nc3 0–0 11.Nd5 c6 12.bc6 Bc6 13.Rc1 Nc5 14.Qc2 Bh6 15.Rb1 Ba4 16.Qc3 Rc8 17.Bc1 The backward pawn on b6 becomes a target 17...Bg7 18.Nb6 Rb8 19.Nd5?? (better is 19.Na4 Rb1 20.Nc5 dc5 21.Nd2= (worse is 21.Ne5 Nd7 22.f4 Ne5 23.fe5 Qc7–/+)) 19...Rb1–+ 20.Nf6 Bf6 21.Bh6 Bg7 22.Rb1 Bh6 23.g3 f5 24.ef5 gf5 25.d4 ed4 26.Nd4 Bg7 27.Ne6?? Bc3 28.Nd8 Rd8 29.Rb6 Ne4 30.f3 Bd4 31.Kg2 Bb6 32.fe4 fe4 0–1. bratek55 (1675) – lokatorki (1805), kurnik, 2011.

4.Nf3 e6 5.e3 f5 6.Bc4 d5 (6...Nf6 7.0–0+=) 7.Be2+= c5 8.0–0 Nf6 9.Ng5 Qe7 10.f4 Nbd7 11.Na3 g6 12.c4 (12.d4 Bg7=) 12...h6 (12...Bg7 13.d3=) 13.Nf3 Bg7 14.d3 (14.Ne5 Ne5 15.fe5 Ne4=) 14...0–0= 15.Ne5 Ne5 16.Be5 Nd7 (16...Rad8 17.Bf3=) 17.Bg7+= Kg7 18.Bf3 Nf6 19.Qa4 Rad8 20.Rad1 e5 21.fe5 Qe5 22.Rfe1 (22.Nc2 dc4 23.d4 Qe7 24.Qc4 Be4 25.Be4 Ne4=) 22...Rfe8 (22...Qb2 23.Nc2=) 23.Rd2 (better is 23.Qc2=) 23...d4 (better is 23...f4 24.Rde2 Qc3=) 24.Bb7+/– de3 25.Bf3?? (25.Rde2 Rd3 26.Nc2 f4+/–) 25...f4?? (better is 25...ed2 26.Re5 Re5–/+) 26.Rdd1+– g5 (26...Qc3 27.Nb1 Qd4 28.Re2+–) 27.Nc2 (27.Qb3 g4 28.Be2 Qg5+/–) 27...g4 (better is 27...Qc3+–) 28.Be2?? (28.Bc6 Re6+–) 28...h5? (28...f3 29.gf3 gf3 30.Bf3 Qf4 31.Re3 Re3 32.Ne3 Qe3 33.Kg2 Kh7–+) 29.Rf1 Kh6 (29...Qg5 30.Kh1+/–) 30.Rde1 (30.Kh1 h4+/–) 30...Rg8 (30...Qg5 31.Kh1+–) 31.Kh1 h4 (31...f3 32.gf3 g3 33.Ne3 Qe3 34.hg3 Rg3 35.Rg1 Rh3 36.Kg2 Rh4 37.Kf1 Rh2 38.Rg6 Kg6 39.Qa5 Qf2) 32.Na3?? (32.Qa3 h3 33.gh3 f3 34.Bf3 gf3 35.Rf3 e2+–) 32...Qg5? (32...h3 33.gh3 f3=+) 33.Rg1+/– Nh5 34.Qd1 Ng3 35.hg3 hg3 36.Bg4 Qg4 37.Qg4 Rg4 38.Rgf1 Kg5 39.Kg1 Rh8 (39...Rd3?! 40.Nb1 Rh4 41.Rf3–/+) 40.Rf3 Rgh4 (better is 40...e2 41.Re2 Rgh4 42.Re5 Kf6–+) 41.Kf1 Rh1 42.Ke2 R1h2?? (better is 42...Re1 43.Ke1 Rh2–+) 43.Rg1+= Rh1 44.Rh1 Rh1 45.Nc2 Rc1 (45...Rb1!? 46.Ne3 Rb2 47.Kd1 fe3 48.Rg3 Kf4 49.Rf3 Kg5 50.Re3 Ra2+/–) 46.Ne3 fe3 47.Rg3 Kf4 48.Rf3 Kg4? (better is 48...Ke5+–) 49.Rf6 Rc2 (49...a4 50.Rb6 Kf4 51.Rf6 Ke5 52.Rf8 Rc2 53.Ke3 Rg2 54.Rc8+–) 50.Ke3 Ra2 51.Rb6 a4 52.d4 cd4 (52...Kf5 53.dc5 Rg2 54.c6+–) 53.Kd4 a3 (53...Ra1 54.Ra6+–) 54.Ra6 Ra1 (54...Kf5+–) 55.b6 a2 (55...Kg3 56.c5 Rd1 57.Ke5+–) 56.Kc5 Rg1 57.b7 (57...Rb1 58.Kc6+–) 1–0. kamret (2175) – peti0815 (2060), GameColony.com, 2003.

4.Nf3 Nf6 5.c4 e6 6.e3 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 b6 4.c4 Bb7 5.Nf3 e6 6.e3).

4.Nf3 Nf6 5.c4 g6 6.g3 Bg7 7.Bg2 0–0 8.Nc3 c5 9.0–0 d6 10.d3 Nbd7 11.Nd2 Bg2 12.Kg2 Qc7 13.e4 e6 14.f4 Rfe8 15.h3 Qb7 16.Qf3 Qc7 17.Na4 Nh5 18.Bg7 Kg7 19.Rae1 e5 20.f5 Ndf6 21.Rf2 Rg8 22.Qd1 Rae8 23.Nf1 Qd8 24.Ne3 Kh8 25.Nc3 Rg7 26.Kh2 Reg8? 27.Rg1 g5+= 28.Kh1 g4 29.h4 Rf8 30.Kh2 Nf4 31.Rb2 N4h5 32.Rb1 Re8 33.Rb2 Rf8 34.a3 Re8 35.Rb1 Rf8 36.Rc1 Re8 37.Rc2 ½–½. Woelfelschneider,Peter (2335) – Gnuechtel,Andreas (2205), CiF–11.Superturnier, 2010.

4.Nf3 Nf6 5.e3 (--> 4.e3 Nf6 5.Nf3).

4.f4 Nf6 5.Nf3 e6 6.e3 d6 7.Be2 Be7 8.0–0 Nbd7 9.c4 0–0 10.a4 Nc5 11.d4 Nce4 12.Nbd2 Nd2 13.Nd2 c5 14.Bf3 Bf3 15.Qf3 g6 16.e4 Nh5 17.d5 Ng7 18.e5 de5 19.fe5 f5? (better is 19...Ra7+–) 20.ef6 Bf6 21.Bf6 Qd7 22.Qe4 Rae8 23.Bg7 Rf1 24.Rf1 Kg7 25.Qe5 Kg8 26.d6 Rd8 27.Ne4 Qg7 28.Nf6 Kh8 29.Qe6 Rf8 30.h4 h6 31.g4 White prepares the advance h5 31...g5 32.h5 Qb7 33.Nd5 Rf1 34.Kf1 Qg7 35.Qf6 Qf6+– 36.Nf6 Kg7 37.d7 Kf6 38.d8Q Ke5 39.Qd5 Kf4 40.Kf2 Kg4 41.Qf3 Kh4 42.Kg2 g4 43.Qf4 Kh5 44.Kg3 Kg6+– 45.Kg4 h5 46.Kh4 Kg7 47.Kh5 Kg8 48.Qc7 Kf8 49.Kg6 Ke8 50.Kf6 Kf8 51.Qf7# (51.Qd8#) 1–0. lllllll21 – narriman, kurnik, 2011.

4.e3 Nf6

5.a4 d5 6.Nf3 Nbd7 7.Be2 g6 8.0–0 Bg7 9.c4 0–0 10.d4 e6 11.Nbd2 c6 12.Rc1 Rc8 13.h3 c5 14.Qb3 Re8 15.Ne5 Ne5 16.de5 Nd7 17.f4 d4 18.ed4 cd4 19.Ba3 Nc5 20.Bf3?? Bf3 21.Qf3+= d3 22.Bc5 Rc5 23.Rc3?? Qd4–+ 24.Kh1 Qc3 25.Ne4 Qc4 26.Nd6 Qa4 27.Ne8 Rd5 28.Nc7 Rd8 29.Rd1 d2 30.Kg1 Bf8 31.Qe2 Bc5 32.Kf1 Qc2 33.Na6 Bb4 34.Nc7 Qc7 35.Rd2 Rd2 (35...Rd2 36.g3 Qc1 37.Kf2 Bc5 38.Kg2 Re2 39.Kf3 Qf1 40.Kg4 Be7 41.f5 Qf5) 0–1. elsh1403 – spartanin59 (1730), kurnik, 2011.

5.c4 d6 6.d4 Nbd7 7.Nf3 g6 8.Bd3 Bg7 9.Nc3 0–0 10.0–0 e5 11.de5 de5 12.e4 Qe7 (12...Nc5 13.Nd5 A) 13...Bd5?! A1) 14.ed5? e4–+ (14...Nd3?! 15.Qd3 e4 16.Bf6 Bf6 17.Qe4=+); A2) 14.cd5 Nfe4 15.Be4 Ne4 16.Be5=; B) 13...Nd5 14.cd5 f5=+) 13.Nd5 Bd5 14.cd5 Ne8 15.Qc2 Rc8 16.Rac1 Nd6 17.Ba3 Bh6 18.Rcd1 f5 19.Rfe1 f4 20.Rc1 g5 21.h3 Bg7 22.Qc6 h5 (22...Bf6!?+/–) 23.Ng5+– Qg5 24.Qd7 f3 25.g3 Rf7 26.Qc6 Rcf8? 27.Bd6 cd6 28.Qb6 Bh6 29.Qd6 Rg7 30.h4 Qd2 31.Red1 Rg3 32.Kf1 Rh3 33.Qe6 Kh8 34.Qh3 Qf4 35.Rc7 Rg8 36.b6 Qf6 37.Qe6 (37...Bg7 38.Qf6 Bf6 39.b7+–) 1–0. kamret (2190) – Archirey (1870), GameColony.com, 2005.

5.c4 e6 6.Nf3 Be7 (6...Bb4 7.Be2=) 7.Be2 d6 (7...0–0 8.0–0=) 8.d4 Nbd7 (8...0–0 9.Nc3+=) 9.0–0+= 0–0 10.Nc3 Ng4 (10...c6 11.Bd3=) 11.Nd2 (11.Bd3 f5+=) 11...Nh6 (11...Ngf6 12.Bf3 Qc8 13.Qa4+=) 12.Bf3 Bf3 13.Nf3 (worse is 13.gf3 Bf6=) 13...f5 14.Qc2 (14.Qd3 Qe8+=) 14...g5 (14...Nf6 15.Rad1+=) 15.Ne2 (15.Rad1 Bf6+/–) 15...Qe8 (15...Bf6 16.a3+/–) 16.Ng3 (16.Rad1 Bf6+/–) 16...Qg6+= 17.a4 (17.Rfd1 Rac8+=) 17...Ng4 (17...Rac8 18.Rab1+=) 18.h3 (18.Rae1 Rac8+/–) 18...Ngf6 (18...Nh6 19.Rae1+=) 19.Nh2 (19.d5 Ne4+/–) 19...h5 (19...Rac8 20.Rab1=) 20.Rfe1 (20.Rad1 Rae8+=) 20...h4 21.Ngf1 (21.Ne2 Rac8+=) 21...Rf7 (21...Ne4 22.f3 Nef6 23.Nd2+=) 22.Nd2 (22.Rad1 Ne4+=) 22...g4 23.hg4 Ng4 24.e4 (24.Qd1 Raf8=) 24...f4 (24...Rg7 25.ef5 ef5 26.Nhf1=) 25.Qb3 Rg7 26.Qh3 e5 (26...Kf7 27.Nhf3+=) 27.Ndf3 Bf6 28.Rad1 ed4 29.Bd4 Nde5 30.Ne5 de5 31.Bb2 Kh8 32.Nf3 Rag8 33.Re2 Qh5 34.Ne1?? Ne3!–/+ 35.Rd7?? Qe2–+ (35...Qe2 36.fe3 Qe1 37.Kh2 Rd7–+) 0–1. Dyga,Ryszard – Kabir,Razaul, Karl Mala mem op, 1997.

5.c4 g6 6.Nf3 Bg7 7.Be2 0–0 8.0–0 d5 9.d4 Nbd7 10.Nbd2 Rc8 11.Qb3 c5 12.bc6 Bc6 13.Rfc1 e6 14.Rc2 Rb8 (14...dc4 15.Rc4 Bd5 16.Rc8 Qc8 17.Nc4+=) 15.Rac1+/– Ne4 16.Ne4 de4 17.Nd2 h5 (17...Qh4 18.Rd1+=) 18.Ba3+/– Re8 19.Bd6 Ra8 20.c5 bc5 21.dc5 Qg5 22.Bb5 Bd5? (better is 22...a4 23.Qb1 Qd5+/–) 23.Qa4+– Nf6 24.Be8 Ne8 25.Ne4 Qd8 26.Nc3 Bb7 27.Rd1 Qc8 28.Be7 Bc6 29.Qh4 Qb7 30.f3 f6 31.Bd6 Bh6 32.Qd4 h4 33.Rb1 Qf7 34.Rb6 Rc8 35.Rcb2 e5 36.Qd3 h3 37.e4 hg2 38.Kg2 Bf4 39.Nd5 Nd6 40.cd6 Qh7 (40...Bd5 41.Qd5 Qd5 42.ed5 Kg7 43.Rb7 Kh6+–) 41.Nf6 (41.Nf6 Kh8 42.Nh7 Kh7 43.d7+–) 1–0. Miljanovic,Zeljko (1915) – Ikica,Ante (2075), Porec CC–ch, 2009.

5.Nf3 c6 6.c4 cb5 7.cb5 g6 8.Be2 Bg7 9.0–0 d6 10.d4 Nbd7 11.Nbd2 Rc8 12.Rc1 Ne4 13.Ne4 Be4 14.Nd2 Bb7 15.Rc8 Qc8 16.Qb1 Nf6 17.Bf3 0–0 18.Rc1 Qd7 19.a4 Rc8 20.h3 Bf3 21.Nf3 Qb7 22.Qd3 Rc1 23.Bc1 Qc7 24.Bb2 Nd5 25.Ba3 Qc3–/+ 26.Qe4 Qa3?? 27.Qd5= Qa4?? 28.Qc6?? Qd1+= 29.Kh2 a4 30.Qe8 Bf8+= 31.Ng5 Qb3 32.e4 h6 33.Nf3? White prepares e5 33...a3–+ 34.e5 a2 35.Qa8 Qb1 36.e6 fe6 37.Qc8 Qf5 38.Qc1 Qb1 39.Qc8 Kf7 40.Qc4 a1Q 41.d5 Qaa2 42.de6 Kg7 (42...Kg7 43.Qd4 Kh7 44.Qb6 Qe6–+) 0–1. ejdrzej – bazyllo (1625), kurnik, 2011.

5.Nf3 e6 =.

5.f4 e6 6.Nf3 =.

5.f4 g6 6.Nf3 Bg7 7.c4 0–0 8.Nc3 d6 (8...Ne4 9.d4=) 9.Be2 Nbd7 (9...c5 10.0–0=) 10.0–0+= Ne4 11.Qc2 Ndc5 12.d3 Nc3 13.Bc3 e5 (13...Bc3 14.Qc3 e6 15.Rad1+=) 14.fe5+/– de5 15.e4 (15.Ne5 Qg5 16.Ng4 Bc3 17.Qc3 f5+=) 15...Qe7 (15...Qd6 16.Rae1=) 16.Rf2 (16.Rad1 f5 17.Nd2 Qg5=) 16...Rad8= 17.Raf1 Rd6 (17...f5 18.ef5 gf5 19.Kh1=) 18.Bd2 (18.Ne1!?+=) 18...Rfd8 Increases the pressure on the backward pawn 19.Ne1 f6 (19...Be4!? 20.Rf7 Qf7 21.Rf7 Kf7=) 20.Be3+= R6d7 21.Qc1 Rf8 22.Qa3 Ne6 23.Qe7+/– Re7 24.Bg4 Rd8= 25.Rc2 Nd4 26.Bd4 Rd4+= 27.Be2 Rd8 28.c5 Kf7 29.Nf3 Bh6 30.cb6 Be3–/+ 31.Kh1 cb6 32.g4 Bc8 33.Rc6 (33.Rc6 Bd7 34.Rd6–/+; 33.g5 Bh3 34.Ne5 Re5 35.Rf6 Kg8=). Valles,Angel – Ruiz,Luis, Oviedo rapid, 1991.

5.Bf6 ef6 6.d4 Bd5 =.

5.Nf3 d6

6.c4 Nbd7 7.Bd3 (7.Be2 e5+=) 7...Nc5 (7...e5 8.Be2=) 8.Bc2+= e5 9.0–0 (9.d4 ed4 10.ed4 Qe7 11.Kf1+=) 9...Qd7 (9...e4!? 10.Nd4 d5 11.cd5 Qd5+=) 10.d4+/– ed4 (10...Nce4 11.de5 de5 12.Qd7 Nd7 13.Ne5 Ne5 14.Be5+/–) 11.ed4 (11.Nd4?! g6+=; 11.Bd4?! Be7+=) 11...Ne6 (11...Nce4 12.d5 0–0–0 13.Nbd2 Nd2 14.Qd2+/–) 12.Re1 (12.d5 Nf4 13.Bf6 gf6 14.Re1 Be7+–) 12...d5 13.Ne5 Qd8 14.Qf3 (14.Bf5 Bc8 15.cd5 Qd5+–) 14...Be7 (14...Bb4 15.Re2+/–) 15.Bf5 0–0 (better is 15...Ng5!? 16.Qf4 Nge4+/–) 16.Nf7!+– Ng5?? (16...Rf7 Decoy to f7 17.Be6 A pinning theme) 17.Ng5 (17.Ng5 Bb4 18.Nc3+–; 17.Nd8?! Nf3 18.gf3 Bd8+/–) 1–0. Gengler,Pierre – Buerger,Arsene, Luxembourg op, 1997.

6.c4 e5 7.d4 Bf3 8.Qf3 e4 9.Qd1 d5 10.Nc3 Bb4 11.Qb3 Qd6 12.a3 Bc3 13.Qc3 Nbd7 14.Rc1 0–0 15.c5 bc5 16.dc5 Qe6 17.c6 d4 18.Qd4 Nb6 19.Bc4 Qg4 20.0–0 Rad8 21.Qc3 Rd6 22.h3 (22.Qa5?! Nc4 23.Rc4 Qe2=) 22...Qh5 23.Qe5 Qg6 24.Bd4 Nc4 25.Rc4 Nd5? (better is 25...Re8 26.Qf4 Nd5+–) 26.Bc5 Nb6 27.Bb6 cb6 28.Qe4 (worse is 28.Re4 Re6 29.Qe6 fe6–+ (29...Qe6?? 30.Re6 fe6 31.Rd1+–)) 28...f5 29.Qe5 Qf7 30.Rd4 Rd4 31.ed4 1–0. Dudkin,Maxim – Elfert,Aleksandr V (2130), Moscow op–B, 2008.

6.c4 e6 7.Nc3 Be7 8.Be2 (8.d4 Nbd7+=) 8...0–0 9.0–0 Nbd7 10.d4 e5 (10...c6 11.bc6 Bc6 12.Bd3=) 11.Qc2+= ed4 (11...Re8 12.de5 de5 13.Rad1+=) 12.Nd4 Nc5 13.Bf3 Qd7 (13...Bf3 14.Nf3 a4 15.Nd5+=) 14.Nc6 (14.Bb7 Nb7 15.Nf5 Rae8+/–) 14...Rfe8 (14...Qe6 15.Na4 Bc6 16.Bc6+/– (16.bc6?! Na4 17.Qa4 Ne4=)) 15.Nd5 (15.Na4 Bd8 16.Nc5 bc5+/–) 15...Nd5 16.Bd5 (16.cd5 Bc6 17.bc6 Qd8+=) 16...Bf6 (16...Qg4 17.Bd4 Bg5 18.Rad1+/–) 17.Bf6+/– gf6 18.a4 (18.Rad1 a4+/–) 18...Qg4 19.Ra3 Rac8 (19...f5 20.e4 f4 21.Rf3+/–) 20.e4 Kh8 21.Bf7 Bc6= 22.bc6 Re7 23.Bd5+/– Rce8 Can e4 get defended? 24.Rg3 Qf4 25.Rf3 Qh6 26.Rh3 Qf8 27.Re1 f5+= Black gets in control 28.Rf3 Qf6= 29.g4 Qg7+= 30.Rf5 Qg4–+ Black creates threats along the open g–file 31.Kh1 Rg7 Threatening mate... how? 32.e5 Reg8! Do you see the mate threat? 33.Qd1 Qf5 34.Bg8 Nd3 35.Rf1 Rg8 36.f4 de5 37.Rf3 Nf4 38.c5 Qe4 (38...Qe4 39.cb6 Nh3 40.Qf1 Qf3 41.Qf3 Rg1#) 0–1. Teichgraber – Squarcialupi, corr, 1969.

6.d4 Nbd7 7.Nbd2 g6 (7...e6 8.Bd3+=) 8.Bd3 Bg7 9.0–0 0–0 10.e4 e5 11.de5 Ng4 12.Nc4 Nge5 13.Nfe5 Ne5 14.f4 (14.Ne5 Be5 15.Be5 de5+=) 14...Nd3 (14...Nc4 15.Bg7 Ne3 16.Qe2 Nf1 17.Bf8 Nh2 18.Bh6+=) 15.Bg7+= Kg7 16.Qd3 f6 (16...d5 17.Qc3 d4 18.Qd3=) 17.Rad1 (17.Ne3 Re8 18.Nd5 Bd5 19.Qd5 Re7+=) 17...Qe8 (17...Qe7 18.Rfe1=) 18.Nd2+= Rd8 (18...Qe6 19.a3+=) 19.c4 Rd7 20.Rde1 Re7 e4 seems the pivot of the position 21.Re3 (21.Re2 Qf7=) 21...Kg8 (21...Qd7 22.f5=) 22.Rfe1 Rff7 (22...Qd7 23.f5=) 23.Nf3+= Qa8 (23...Rf8 24.f5+=) 24.Nd4 Rf8 25.f5 Rfe8 Increases the pressure on the backward pawn 26.Ne6 Re6 27.fe6 Re6 28.Qd4 Qe8 29.R1e2 (29.Kf2 Re5+=) 29...Qe7 30.Kf1 Re5 31.Ke1 (31.a3 Qe6+=) 31...Qe6 32.h3 (32.a3 Rh5=) 32...Rc5 33.Rc3 (33.Rf2 Kg7 34.Rc2 Re5=) 33...Re5 34.Rce3 Rc5 ½–½. Hoy,Ralph (2075) – Bucan,Djordje (2125), Bayernliga, 2006.

6.Bf6 ef6 7.d4 d5 +=.

5.Nf3 e6

6.a4 Bb4 7.Be2 0–0 8.0–0 Be7 9.Nc3 d5 10.Ne5 Nbd7 11.f4 Nc5 12.Nc6 Bc6 13.bc6 Nce4 14.Ne4 Ne4 15.d3 Nd6 16.Bf3 Nf5 17.Qe2 Bc5 18.d4 Be7 19.g4 Nd6 20.Qg2 (better is 20.e4!? Nc4 21.Bc3+=) 20...Nc4–/+ 21.Bc1 Bb4 22.f5 Qd6 23.f6 g6 24.Qh3 Bd2?? 25.Qh6 Bc1 26.Qg7 1–0. dtpwaldi (1615) – walselob, kurnik, 2011.

6.c4 Bb4 7.a3 Be7 8.d3 0–0 9.Nbd2 d5 10.Be2 dc4 11.Nc4 Qd7 12.a4 (12.Qa4 Nd5+=) 12...Bb4= 13.Ncd2 Nd5 14.Qc2 Rc8 15.0–0 c6 16.Qd1 (better is 16.bc6!? Nc6 17.Nc4=) 16...cb5–/+ 17.Ne5 Qe8 18.ab5 Qb5 19.Ne4 a4 20.Bh5 g6 21.Bf3 a3 22.Bd4 Nd7 23.Ng4 e5 (23...Ba6 24.Qb1 Be7 (24...Qd3?! 25.Ngf6 N7f6 26.Nf6 Nf6 27.Qb4+=) 25.Ngf6 Bf6 26.Nf6 N7f6 (26...N5f6 27.Ba8 Qb1 28.Rfb1 Bd3 29.Rb3+=) 27.Ra3 Nd7–+) 24.Ne5+= Ne5 25.Be5 Bc6 26.d4 a2 27.Be2 Qa4 28.Qa4 Ra4 29.Bc4 Bc3 30.Bd5 (30.Ba2!? Ba1 31.Bd5= (31.Ra1?? Rca8–+)) 30...Ba1–/+ 31.Nf6 Kf8 32.Nh7 (better is 32.Ra1!? Bd5 33.Bd6 Kg7 34.Nd5 Rc1 35.Rc1–+) 32...Ke7–+ 33.Bf6 (33.Ra1 Bd5 34.Nf6–+) 33...Ke8 34.Bc6 Rc6 35.Ra1 Rc1 (better is 35...Rac4 36.g4 Rc1 37.Rc1 Rc1 38.Kg2 a1Q–+) 36.Rc1–/+ a1Q 37.Rf1 Qa2 38.h3 b5 39.Rc1 Rc4 40.Rd1 Qc2 41.Ra1 Ra4 42.Re1 Qd2 43.Rb1 b4 44.Bg5 f5 45.Nf6 Kf7 46.Nd7 Ra2 (46...Qc2 47.Rf1–+) 47.Ne5 Kg7 48.Bh4? (48.Rf1 b3 49.Nf3 Qe2–+) 48...g5 (48...b3 49.Rf1–+) 49.Nf3 (49.Bg3 b3! 50.Kh2–+) 49...Qc2 50.Rb4 (50.Rf1 gh4 51.Ne1 Qc4–+) 50...gh4 51.Rb7 Kf8 52.Rb8 Ke7 53.Rb7 Kd8 54.Nh4 Qf2 55.Kh2 0–1. Urbanaites,Elvira (1880) – Sokolova,Vera (2020), St Petersburg Rudenko mem, 2006.

6.c4 d5 7.a4 dc4 8.Na3 Bb4 9.Nc4 0–0 10.Be2 Ne4 11.0–0 Nd7 (11...c6 12.bc6 Nc6 13.Rc1=) 12.Qc2 (12.Rc1 Nd6+=) 12...Ndf6 (12...Nd6 13.Rac1+=) 13.d3 Nc5 14.Rfc1 Nd5 15.d4 Nd7 16.Bd3 f5 17.Qb3 Qe7 18.Nce5 Ne5 19.Ne5 Rf6 (19...Bd6 20.Ba3+=) 20.e4 (20.Nc6 Qd6+=) 20...Nf4= 21.Nc6 Bc6 22.Rc6 (worse is 22.bc6 fe4 23.Bf1 Raf8–/+) 22...Nd3 23.Qd3 fe4 24.Qe4 Raf8 25.f3 Rg6 26.Rd1 (26.Bc1 Bd6+=) 26...Qg5= Threatening mate: Qxg2 27.g3 Bd6 28.Bc1 Qh5 29.Kg2. Labahn,Thomas – Mani,M, corr BRD–CH, 1990.

6.c4 d5 7.Nc3 Nbd7 8.d4 dc4 9.Bc4 Bb4 10.a3 Bc3 11.Bc3 Nd5 12.Bb2 N7f6 (12...c6 13.0–0+=) 13.0–0+/– Ne4 (13...Rc8 14.Re1+=) 14.Rc1 0–0 15.Qc2 White gets in control 15...Ndf6 16.Ne5 Rc8 17.Bd3 Nd6 18.Nc6 Qd7 (18...Bc6!? 19.Qc6 Nd5+/–) 19.e4+– Nfe8 20.e5 Nf5 21.Bf5 (21.d5 Bc6 22.dc6 Qe7+–) 21...ef5 22.d5 Bc6 23.Qc6 (23.bc6?! Qd5 24.Qf5 Rd8+=) 23...Qc6 24.Rc6 Rd8 25.Rd1 Rd7 26.a4 f6?! (26...Kh8+–) 27.Ba3 (better is 27.e6 Re7 28.Ba3+–) 27...fe5+/– 28.Bf8 Kf8 29.Re6 e4 30.f3 ef3 31.gf3 Kf7 32.Rc6 Nf6 33.d6 Ne8 34.dc7?? The passed pawn on c7 quickly leads to threats (better is 34.Rdc1 Rd6 35.Rd6 Nd6 36.Rc7 Kf6 37.Rc6+–) 34...Rd1+= 35.Kg2 Nc7 36.Rc7 Kf8 37.Rc6 Rd4 38.Rb6 Ra4 39.Ra6 Kf7 40.b6 Rb4 41.Ra5 ½–½. De Visser,Arno – van Egmond, 1998.

6.c4 Be7 7.Be2 0–0 8.0–0 d6 9.d4 Nbd7 10.Nbd2 Ne4 (10...c6 11.a4=) 11.Qc2 f5 12.Bd3 (12.Ne4 Be4 13.Qa4 Rc8+=) 12...Nd2 (12...Ndf6 13.Rfd1=) 13.Nd2+= Qe8 14.e4 Qg6 15.f3 Bg5 16.ef5 ef5 17.Rae1 Qh6 18.Re2 Be3 19.Kh1 Bf4 Do you see the mate threat? 20.h3 Qh4 Threatening mate: Qg3 21.Rg1 Nf6 22.Nf1 Nh5–/+ The mate threat is Ng3 23.Bc1 g6 24.d5+= Rae8 25.Bf4 Qf4 26.Qd1 Bc8 27.Rf2 Re7 28.g3 Qd4 29.Rd2 Qc5 30.Qc2 Re1 31.g4?? Nf4–+ 32.Bf5?? Nh3 33.Rdg2 Ng1 34.Rg1 Bf5 35.gf5 Rf5! 36.Qd2 Rh5 37.Kg2 Rhe5 38.Qd3 Rg5 (38...Rg5 39.Kh3 Qg1 40.Qf5 Qh1 41.Nh2 Qg2 42.Kh4 Qg3) 0–1. Luneau – Schichtel, Wildbad, 1993. (=1.Nf3 Nf6 2.b4 a5 3.b5 b6 4.e3 Bb7 5.Bb2)

6.d4 d6 7.c4 Nbd7 8.Nbd2 (8.Nc3 g6+=) 8...Ne4 (8...g6 9.g3+=) 9.Be2 (9.Ne4 Be4 10.Bd3 Nf6+=) 9...Be7 10.0–0 Ndf6 11.Rc1 0–0 12.Nb1 (12.Bd3 Qd7+=) 12...Nd7 (12...Qd7 13.Nfd2=) 13.Ne1 (13.Nfd2 Nd2 14.Nd2 f5+=) 13...f5 14.f3 Nef6 (14...Bg5 15.Nc2 Nef6 16.Nc3=) 15.Nd3+= Nh5 16.Nf4 (16.Nc3 Qe8+=) 16...Nf4= 17.ef4 g5 (better is 17...Rf6!?=) 18.fg5+/– Bg5 19.f4 Bf6 20.Bf3 Bf3 21.Rf3 Nc5 (21...Qe7!?+/–) 22.Nc3+– (22.dc5?! Bb2 23.Rg3 Kh8=) 22...Ne4 (22...Nb7 23.Re3 Qd7 24.Na4+/–) 23.Ne4 fe4 24.Re3 d5 (24...Bg7 25.Qg4 Qf6 26.Re4 d5+/–) 25.Qg4 Kf7 (25...Kh8 26.Qe6 dc4 27.Rc4 Qe8 28.Qe8 Rfe8+–) 26.Rh3 Rh8 27.Qh5 (27.f5 ef5 28.Qf5 h5+–) 27...Ke7 28.Ba3 Kd7 29.Qf7 Kc8 30.Qe6 Kb8 (30...Kb7 31.Kf1 dc4 32.Rc4+–) 31.cd5 Bd4 32.Kf1 Re8 (32...Qe8 33.Qe8 Re8 34.Rc4+–) 33.Qc6 Bc5 (33...Ra7+–) 34.Bc5 bc5 35.Rh7 (better is 35.Rb1 Qd6 36.Qe8 Kb7 37.Qc6 Qc6 38.bc6 Ka6 39.Rh7+–) 35...Rf8 (35...Re7 36.Re7 Qe7+–) 36.b6 Rf4 37.Kg1 1–0. Lunin,Mikhail – Vasiliev,Aleksey, Zhukovsky A, 2010.

6.d4 Be7 7.a3 0–0 8.Be2 h6 (8...c6 9.0–0=) 9.Nbd2 Nh7 (9...c6 10.0–0=) 10.0–0+= Bf6 (10...Nf6 11.c4+=) 11.c4+/– Re8 12.Qc2 Ng5 13.Ng5 Bg5 14.Nf3 Bf6 15.Rfd1 d6 16.Rac1 Nd7 17.a4 Rc8 18.Qb3 d5 19.cd5 Bd5 20.Bc4 Bf3 21.gf3 Bh4 22.f4 Nf6 23.Be2 Ne4 24.Rf1 Nd2 25.Qc2 Nf1 26.Bf1 Qd5 27.Bg2 Qf5 28.Qc3 Qg4–/+ 29.f3 Qg6 30.Kh1 Bf6 31.Rg1 Qh5 32.e4 Bh4 33.d5 e5 34.fe5 Bf2 35.e6+= f6 36.Rf1 Bc5 37.Qd2 Bd6 38.h3 Qh4 39.Qf2 Qf2 40.Rf2+= Bc5 41.Rc2 Be3 42.Rc6 Bg5 43.Kh2 Kh7 44.Kg3+– Kg6?? 45.Kf2 h5 46.Bc3 Bh4 (46...Bh4 47.Ke3 Bg3+–). Fournier,Frederic – Harison, Partie evaluee, 3m + 0s, 2008.

6.Be2 Be7 7.0–0 0–0 8.c4 d6 9.Qc2 Re8 10.Nc3 Bf8 11.d4 Nbd7 12.Rfd1 Qc8 13.Rac1 c5 14.bc6 Bc6 15.Qb1 Qb8 16.h3 e5 17.Ba3 Ra7 18.Nb5 Bb5 19.cb5 (19.Qb5 Qc7+/–) 19...e4+= 20.Nd2 d5 21.Bf8 Nf8 22.Rc6 Ne6 23.Rdc1 Rae7 24.Qb2 Rc7 25.Rc7 Nc7 26.Nb1 Ne6 27.Nc3 Rc8 28.Na4 Nd7 29.Rc6 f5?? (better is 29...Nd8 30.Rc8 Qc8+=) 30.Re6+– 1–0. Kalashnikov,Konstantin (2415) – Kornienko,Sergey (2190), RUS–chT2, 2003.

6.Be2 Be7 7.0–0 0–0 8.d4 Ne4 9.Nfd2 f5 10.c4 d5 (10...Bd6 11.Ba3=) 11.Nc3+= Nd7 12.Nde4 de4 13.Qb3 Rf6 14.Rad1 (14.f3 ef3 15.Bf3 Bf3 16.Rf3 Bd6+=) 14...Bd6= 15.g3 Qe7 16.Na4 (16.a3 c5+=) 16...Rh6 (16...Rf7 17.f3=) 17.f4 (17.Rc1 Rd8=) 17...ef3 (17...Rd8 18.Qc2 Rc8 19.Rc1=) 18.Bf3 Rh2? (better is 18...Bf3!? 19.Rf3 Qg5=) 19.Bb7+/– Bg3 (19...Qg5 20.Rf2 Qg3 21.Rg2 Rg2 22.Bg2 Nf6+=) 20.c5?? (20.Bg2 Qg5 21.Rd2 Rd8+–) 20...Kh8?? (20...Qh4 21.Qe6 Kh8 22.Qf5 Rb2–+) 21.Rf5?? (better is 21.Bg2 Re8 22.a3+–) 21...ef5–+ 22.Ba8 (22.Bg2 Qg5 23.Rd2–+) 22...Qh4 23.Qe6 Rh1 (23...Rh1 24.Bh1 Qh2 25.Kf1 Qf2) 0–1. Parr,David – Franklin,Michael, Islington, 1972.

6.Be2 Be7 7.a4 d6 8.0–0 Nbd7 (8...0–0 9.Nc3=) 9.d4 (9.Nd4 0–0=) 9...c5 (9...Rc8 10.Nbd2=) 10.bc6 Bc6 11.Nc3 (11.c4 Rc8=) 11...0–0 12.Nb5 Nd5 (12...Ne4 13.Rb1=) 13.c4+= Nc7 (13...Nb4 14.Ba3+=) 14.Rc1 (14.Bd3 Nf6+=) 14...Nb5 15.cb5 Bb7 (15...Bd5 16.Nd2+=) 16.Nd2 (16.Bd3 f5+=) 16...Rc8= 17.Qb3 (17.Bd3 Rc1 18.Qc1 Nf6=) 17...Rc1 (17...Nf6 18.Qd3=) 18.Rc1+= Qb8 19.Bf3 (19.Bd3 Rc8+=) 19...d5 (19...Bf3 20.Nf3 Nf6 21.Ba3=) 20.Ba3+= Bd6 (20...Ba3 21.Qa3 Rc8 22.Rc8 Qc8 23.Qe7+=) 21.g3 Nf6= 22.Be2 Rc8 23.Rc8 Bc8 24.Kg2 Ba3 25.Qa3 Qc7 26.Bd3 Bb7 27.f3 g6 28.Nb1 Kg7 29.Qc3 Qc3 30.Nc3 Kf8 31.g4 g5 32.Kg3 h6+= 33.h4 Nd7 34.f4 f6 35.Bc2 Ke7 36.f5 e5 37.Bb3 Kd6 38.Bd1 Ba8 39.Ne2 e4 40.Kh3 Bb7 41.Ng3 Ke7 42.Bb3 Ba8 43.Kg2 Bb7 44.Nh5 Kf7 45.Kh3 ½–½. Lipok,Erik (2000) – Eichinger,Hans (1815), Niederbayernliga, 2007.

5.Nf3 g6

6.c4 Bg7 7.Be2 0–0 8.0–0 c6 9.a4 Qc7 10.g3 (10.d4 d6+=) 10...d5 11.Na3 Nbd7 12.Rc1 c5 13.d4 Ne4 14.Nd2 Ng5 15.Rc2 dc4 16.Ndc4?? (better is 16.Nf3 c3 17.Bc3=) 16…Nh3 0–1. Vaast,Jean – Gaudron,Fanny (1950), FRA–chT, 2000.

6.c4 Bg7 7.Be2 d6 8.d4 e6 9.0–0 0–0 10.Nc3 Nbd7 11.Rc1 e5 12.de5 de5 13.Na4 (13.Qc2 e4 14.Nd4 Qe7+=) 13...Qe7= 14.Qc2 c5 15.bc6 Bc6 16.Qb3 Qb4 17.Nc3 Nc5 18.Qc2 Nfe4 (18...Rae8!?=) 19.Nd5+/– Bd5 20.cd5 f6 21.a3 (21.Rfd1 Qa4 22.Nd2 Qc2 23.Rc2 Nd2 24.Rcd2 Rfd8+/–) 21...Qa4+= 22.Qc4 (22.Rfd1 Qd7+=) 22...Qc4 23.Bc4 Nd6 24.Nd2 Rfc8 25.Be2 b5 26.f4 b4 27.Nc4 (27.fe5 fe5 28.Bg4 Bh6=) 27...Nc4 28.Bc4 Na4 29.Ba1 Nc3 30.ab4 ab4 31.Bc3 Rc4 32.Bd2 Rac8 (better is 32...Rc1!? 33.Rc1 ef4 34.ef4 b3+=) 33.Rc4+/– Rc4 34.fe5 fe5 35.d6 Bf8 36.d7 (36.Rf6 b3 37.d7 Be7+=) 36...Be7= 37.Rb1 Rc7 38.Bb4 Rd7 39.Be7 Re7 40.Kf2 Kg7 41.Kf3 h6 42.Ke4 Kf6 43.h4 h5 44.Rb5 Re6 45.Kd5 Ra6 46.e4 g5 47.hg5+/– Kg5 48.Ke5 Ra2 49.Kd6 Kg6 50.Rb8 h4 51.Rh8 Kg7? 52.Rh4+– Rg2 53.e5 Ra2 54.Ke6 Ra6 55.Kf5 Ra1 56.Rd4 Kf7 57.Rd7 Ke8 58.Rb7 Ra2 59.Kf6 Rf2 60.Ke6 Kd8 61.Rb8 Kc7 62.Rg8 Rf1 63.Ke7 Rf2 64.e6 Rh2 65.Rg7 Rf2 66.Rg4 Rc2 67.Ke8 Rc1 68.e7 1–0. Krivoshapko,Alexander – Mikhailovsky,Viktor, Final Omsk, 2010.

6.d4 d6 7.Bd3 Bg7 8.Nbd2 Nbd7 9.Nc4 0–0 10.Qe2 Ne4 11.0–0 Qe8 12.Rad1 (12.Be4 Be4 13.Ncd2 Bb7 14.e4 e6 15.c4 f5 16.Rae1+= 0.34) 12...e5 (12...a4 13.a3+= f5 14.Ncd2 Ndc5 15.Bc4 e6 16.Qe1= 0.19; 12...f5 13.Ncd2 Ndc5 14.Bc4 d5 15.Ba1 Nd2 16.Nd2= 0.22) 13.de5 de5 14.Be4 Be4 15.Ba3 Nc5 16.Bc5 bc5 17.a4 Qe7 18.Rd2 g5 (18...Rfd8!?+=) 19.Rfd1+/– g4 20.Ne1 Bf5 21.Nd3 Rfe8 22.e4 Bc8 23.Nc1 Bh6 24.Rd5 Be6 25.Re5 Bg7 26.Rh5 Bc4 27.Qc4 Qe4 28.Rc5 Bd4? 29.Rc7+– Re7 30.Rc6 Rae8 31.Qf1 g3 32.hg3 Qg4 33.Rd6 Bc5 34.R6d5 Bb6 35.c4 Re5 36.Re5 Re5 37.Nd3 Rh5 38.Nf4 Rh6 39.Rd3 Bc7 40.Qd1 Qf5 1–0. Poley,Vladimir (2330) – Sanchez,Nicolas (2155), 1st Open, Condom FRA, 2002.

6.Be2 Bg7 7.0–0 0–0 8.c4 c6 9.d4 d5 10.Nc3 Nbd7 11.cd5 cd5 12.Na4 Rc8 13.Rc1 Ne4 14.Bd3 Nd6 (14...Rc1 15.Qc1 Qb8 16.Ne5 Ne5 17.de5 Be5 18.Be5 Qe5 19.Nb6=) 15.Qb3 Nf6 16.Ne5 Nfe4 17.Rfd1 Rc1 18.Rc1 e6 19.f3 (19.Ba3 Re8+/–) 19...Nd2 20.Qd1 (20.Qc2 N2c4 21.Nc4 dc4 22.Bc4 Bh6+/–) 20...N2c4+= 21.Nc4 Nc4 (21...dc4 22.Bc4 Nc4 23.Rc4+=) 22.Bc4+/– dc4 23.Rc4 Qg5 24.Nb6 Qe3 25.Kf1 (25.Kh1!?+=) 25...Qf4= 26.d5 (better is 26.Kg1!?=) 26...Qh2–/+ 27.Bg7 Qh1 (worse is 27...Kg7 28.Qd4 e5 29.Qc3+/–) 28.Ke2 Qg2 29.Ke3 Kg7 30.Qd4 Kg8 31.Nd7 Qg1 (31...ed5!? 32.Nf6 Kh8+=) 32.Kd2= Qd4 33.Rd4 Rc8 (worse is 33...ed5 34.Nf8 Kf8 35.Ra4+/–; 33...Bd5? 34.Nf8 Bf3 35.Nd7+–) 34.d6 (34.de6 fe6 (34...Bf3? 35.ef7 Kf7 36.Ne5 Kf6 37.Nf3+–) 35.f4 Kg7+=) 34...Rd8+= (worse is 34...Bf3 35.Ne5 Bd5 36.Nc6 Rc6 37.bc6 Bc6 38.d7 Bd7 39.Rd7+/–) 35.Nc5 Bd5 (35...Bf3 36.Ke3 Bd5 37.d7–/+) 36.d7= Kf8 37.Ra4 Ra8 38.Ra5+/– Ke7?? 39.Ra8+– Ba8 40.a4 h5 41.Ke3 g5? 42.Kf2 h4 43.a5 f5 44.a6 g4 45.fg4 fg4 46.b6 g3 47.Kg1 Bc6 48.b7 h3 49.d8Q! (49.d8Q Kd8 50.b8Q Ke7 51.Qc7 Kf6 52.Qc6 h2 53.Kg2 h1Q 54.Kh1+–) 1–0. Puentes,Alvaro (2100) – Ospina Ortiz,Oscar Alexander (1950), Ortega COL, 3rd Open, 2013.

6.Be2 Bg7 7.0–0 0–0 8.d3 c6 9.c4 d6 10.Nbd2 cb5 11.cb5 Nbd7 12.a4 Nc5 13.d4 Nce4 14.Ne4 Ne4 15.Nd2 d5 16.Ne4 de4 17.Rc1 Rc8 18.Ba3 Qd7 19.Bg4 Rc1 (19...f5 20.Be2=) 20.Bc1 (better is 20.Bd7!? Rd1 21.Rd1+/–) 20...f5 21.Be2 Rc8 22.Ba3 e6 23.Qb1 Bd5 24.Rc1 Bf8 25.Bf8 Kf8 26.g3 Kf7 27.Qb2 h6 28.Bd1 Kf6 29.Kg2 g5 30.h3 Rc7 31.Qa3 Rc1 32.Qc1 h5 33.Bh5+/– Bb3?? 34.Bd1 Bd1 35.Qd1 Qc7 36.Qh5 Qc4 37.Qh6 Kf7 38.Qg5 Qa4 39.h4?? Qb5= 40.h5 a4?? 41.h6+– Qe2 42.Qg7 Ke8 43.Qg8 Ke7= 44.Qg5 Kd6?? 45.Qf4 Kc6 46.h7 Qh5 47.Qe5 Qf3 48.Kh2 Qh5 49.Kg1 Qh7 50.Qe6 Kb5 51.Qd5 Ka6 52.Qc4 b5 53.Qc6 Ka5 54.Qa8 Kb4. ejdrzej (1780) – xanonimowyx (1635), kurnik, 2011.

3.Bb2 c5

4.c4 (--> 2.b5 c5 3.c4 b6 4.Bb2).

4.e3 Bb7 (--> 3.e3 Bb7 4.Bb2 c5).

3.Bb2 c6

4.a4 cb5 5.ab5 (--> 1.b4 a5 2.b5 c6 TESTA340 3.a4 cb5 4.ab5 b6 5.Bb2).

4.bc6 Nc6 5.Nf3 Bb7 6.d3 Nf6 7.e4 g6 8.Be2 Bg7 9.0–0 0–0 10.c4 e6 11.Nc3 d5 12.e5 (12.cd5 ed5 13.e5 Ng4=) 12...Nd7= 13.d4 dc4 14.Bc4 Ba6 (14...Rc8 15.Qe2=) 15.Nb5 Bb5 16.Bb5 Nb4 (16...Na7 17.Bd3+=) 17.Qb3 (17.Qa4 Nb8+/–) 17...Rc8 18.Rac1 Nb8 19.a3 (19.Rc8!? Qc8 20.Ba3+/–) 19...Nd5 20.g3 (20.Rc8 Qc8 21.Rc1 Qd8+/–) 20...Qe7 21.Kg2 g5 22.h3 h5 23.Rc8 Rc8 24.Rc1 Rc1 25.Bc1 Nd7? 26.Bg5+– f6 27.ef6 Bf6 28.Bf6 N7f6 29.Ne5 Qg7 30.Qf3 h4 31.Bd3 hg3 32.fg3 Nh7 33.h4 Nhf6 34.Kh3 Nc3?? 35.g4 b5? 36.g5 Nfd5 Black prepares the advance b4 37.Nd7?? b4?? 38.ab4 ab4 39.Bc4?? Kh7?? 40.Nf6 Kh8 41.Qg3 Nc7?? 42.Qd6+– N3d5 43.Qd8 (43.Qd8 Ne8 44.Qe8 Qg8 45.Qg8#) 1–0. bratek55 (1660) – aplws, kurnik, 2011.

4.e3 e6 5.Nf3 f6 6.Nh4 cb5? (better is 6...Nh6+=) 7.Qh5+– g6 (7...Ke7 8.Ng6! hg6 9.Qh8+–) 8.Ng6! hg6 9.Qh8 Nh6 (9...Kf7 10.Bb5 Bg7 11.Qh4+–) 10.Bf6 (10...Nf7 11.Qf8 Kf8 12.Bd8 Nd8 13.Bb5+–; 10.Bd3!? Kf7+–) 1–0. Wall,Bill – Sask, Internet, 2003.

4.e4 cb5 5.Bb5 Nc6 6.d4 Ba6 (6...Nf6 7.Nd2+=) 7.Nc3 (7.Ba6 Ra6 8.Nf3 e6+/–) 7...Qc7 (7...e6 8.d5 Nb4 9.a3+/–) 8.Nd5 0–0–0?? (better is 8...Qd8 9.Ba6 Ra6+=) 9.Ba6+– Kb8 10.Nc7 Kc7 11.d5 Ne5 12.Be5 d6 13.Qd3 de5 14.Qc3 Kb8 15.Qc6 Rd6 (15...Rd7 16.Qd7 Nf6 17.Qb7) 16.Qb7 1–0. moonlightconcert (2800) – idontknow, net–chess.com, 2006.

4.e4 e6 5.Nf3 d5 6.ed5 cd5 7.d4 Nf6 8.Bd3 Bb7 9.0–0 Nbd7 10.c4 (10.Re1!?=) 10...dc4+= 11.Bc4 Bd6 12.Nbd2 0–0 13.Qe2 Rc8 14.a4 Nd5 15.Ne4?? (better is 15.Ba3 Ba3 16.Ra3+=) 15...Nf4–+ 16.Qe3 (16.Nd6 Ne2 17.Be2–+) 16...Be4 (16...Be4 17.Rac1 Nf6–+; 16...Rc4?! 17.Nd6 Nd5 18.Nb7 Ne3 19.Nd8 Nf1 20.Nc6+=) 0–1. craig4000 – PeterRs, ChessWorld.net, 2015.

4.e4 Nf6 5.Nc3 +=.

3.Bb2 Nc6

4.bc6 dc6 5.e4 Bd7 6.d4 Qb8 7.Nf3 Qb7 8.c4 0–0–0 9.Bd3 b5 10.Nbd2 e6 11.Rb1 Bb4 12.0–0 Nf6 13.Nb3 bc4 14.Bc4 Ne4 15.Qd3 Nd6 16.Ba6 Qa6 17.Qa6 Kb8 18.Na5 Nc4 19.Qb7 1–0. moonlightconcert (2800) – idontknow, net–chess.com, 2006.

4.bc6 dc6 5.e4 Bd7 6.d4 Qc8 7.Nf3 Qa6 8.Ba6 Ra6 9.Qd3 Ra8 10.0–0 Be6 11.Ne5 Kd8 12.Nc6 Kc8 13.d5 Bd5 14.ed5 e6 15.de6 Bc5 16.ef7 Kb7 17.Qd5 Ra6 18.Ne7 Kb8 19.f8Q Ka7 20.Qfa8 1–0. moonlightconcert (2800) – idontknow, net–chess.com, 2006.

3.Bb2 d6

4.a4 Bb7 5.c4 e5 6.e3 Be7 7.Nf3 Nd7 8.Be2 Nc5 9.0–0 Nf6 10.d3 0–0 11.e4 h6 12.Nc3 Bc8 13.d4 Nce4 14.Ne4 Ne4 15.de5 Nc5 16.ed6 Bd6 17.g3 Bh3 18.Re1 Bg4 19.Qd4 f6 20.Qg4 Nb3 21.Rad1 Nc5 22.Nd4 Qd7 23.Qd7 Nd7 24.Bf3 Rad8 25.Ne6 Nc5 26.Nf8 Kf8 27.Ba3 Na4 28.Bd6 cd6 29.Bd5 Nc5 30.Re2 Nd7 31.Rde1 Ne5 32.Rd1 h5 33.f4 Ng4 34.Bc6 f5 35.Re6 Kf7 36.Red6 Ne3 37.Rd8 Nc4 38.Bd5 Kf6 39.Bc4 h4 40.gh4 g6 41.Rb8 g5 42.Rb6 Kg7 43.hg5 a4 44.Ra6 a3 45.Rd7 1–0. jarda1000 – olek1935, kurnik, 2012.

4.Nf3 Nf6 5.Nc3 +=.

4.Nf3 h6 5.e4+= e5 (5...Bb7 6.d3+=) 6.d4+/– d5 7.Ne5 de4 (7...Nf6!? 8.ed5 Qd5+/–) 8.Bc4+– Be6? (8...Qh4+–) 9.Be6 fe6 (9...Bb4 10.c3 Bc3 11.Nc3 Qg5 12.Bf7 Kf8 13.Ba3 Ne7+–) 10.Qh5 Ke7 11.Ba3 (11...Qd6 12.Qf7 Kd8 13.Bd6 Bd6 14.Qg7 Be5 15.de5+–) 1–0. Wall,Bill – SmartAttack, Internet, 1996.

3.Bb2 e6

4.a3 Ne7 5.e3 Ng6 6.Be2 Bb7 7.Bf3 (7.Nf3 f6+=) 7...d5 8.c4 Nh4 9.cd5 Bd5 10.Nc3 Bf3 11.gf3 (11.Nf3 Ng2 12.Ke2 Nh4+=) 11...Nd7 (11...Qg5 12.Nge2 Qg2 13.Ng3–/+) 12.Nge2? (better is 12.Ne4!?=) 12...Nf3 13.Kf1 Nc5 14.Nd4? (better is 14.d4 Nb3! 15.Nc1 Nbd2 16.Ke2–/+) 14...Nd4–+ 15.ed4 Qd4 16.Rc1 (16.Qf3 Rd8–+) 16...Nd3 17.Qf3 Rd8 (17...Nb2?! 18.Qa8 Qd8 19.Qd8 Kd8 20.Ke2+=) 18.Rc2 Nb2 19.Qc6 Qd7 20.Rb2 Ba3 21.Ra2 Bb4 22.Ne4 (22.Qc4 Qd6–+) 22...0–0 (22...Qc6 23.bc6 Rd4 24.f3–+) 23.Rg1 (23.Qd7 Rd7 24.Ke2 Rd5–+) 23...Qd3 24.Kg2 Rd5 25.Ng3 (25.Qc2 Qb5 26.Kh1 Rd3–+) 25...Rc5 (25...Bd2?! 26.Rd1 Qb5 27.Qb5 Rb5 28.Rad2–+) 26.Qb7 Qb5 27.Kh3 (27.Qf3 Rd5–+) 27...Qc4 28.Raa1 Bd2 29.Rad1 Rd5 30.f3 h6 31.Ne4 Qd4 (31...Rh5 32.Kg4 g6 33.h4 f5 34.Kh3 fe4 35.Qe4 Rf3 36.Qf3 Qh4 37.Kg2 Qh2 38.Kf1–+) 32.Rg2 (32.Qc7 Rfd8 33.Qg3–+) 32...Rh5 (32...Qe3 33.Rg3 Rh5 34.Kg2 Qe2 35.Nf2–+) 33.Kg4 f5 (better is 33...Qe5 34.Nf6 gf6 35.h4–+) 34.Kh5 fe4 35.fe4 (35.Qe4 Rf5 36.Qf5 ef5 37.Rdd2–+) 35...Qe5 36.Kh4 Rf4 37.Rg4 Qg5 38.Kh3 Qg4 0–1. mikebaldini (1705) – shrekee (1660), gameknot.com, 2014.

4.c4 f5 5.Nf3 Nf6 6.e3 Be7 7.Be2 Bb7 8.0–0 0–0 9.Nd4 Bd6 10.f4 g5 11.Bf3 Bf3 12.Qf3 c6 13.fg5 Ng4 14.h3 Nh2 15.Qh5 Nf1 16.Kf1 Qe8 17.Qf3 Be5 18.Ke2 (18.Bc3 f4 19.Kg1 fe3–/+) 18...Bd4 (better is 18...d5!?–+) 19.Bd4=+ e5 20.Bb6 Qe6 21.Na3 e4 22.Qf4 cb5 23.Bd4 (better is 23.c5!?–/+) 23...b4–+ 24.Nc2 Qc4 25.Kf2 Nc6 (25...Qc2?! 26.Qe5 Kf7 27.Qd5 Kg6 28.Qd6 Kf7 29.Qd5 Kg6 30.Qd6 Kf7 31.Qd5=) 26.Bf6?? (26.g6 hg6 27.Qh6–+) 26...Qc2 27.Qd6 Qd3 28.Qd3 ed3 29.Rc1 Rf6 30.gf6 a4 (31.g4 fg4 32.hg4 Kf7–+) 0–1. Mielke,Sven – Ossenbrueggen,Lars (2055), Wichern op 4th, 1997.

4.e3 Nf6 5.c4 Qe7 6.Nf3 Rg8 7.Be2 g6 8.d4 Bg7 9.Bd3 Rf8 10.Qc2 Ng4 11.h3 Nh6 12.Nbd2 Nf5 13.e4 Nh4 14.Nh4 Qh4 15.0–0 Bb7 16.Nf3 Qe7 17.d5 Bb2 18.Qb2 d6 19.Qg7 e5 20.Qh7 Nd7 21.Qh4 Qh4 22.Nh4 Nc5 23.Bc2 Bc8 24.Nf3 Bd7 25.Ng5 f6 26.Nf3 0–0–0 27.Nh4 Rg8 28.f4 Rg7? 29.Kh2 Rh8+= 30.Nf3 f5?? 31.ef5+– Bf5 32.Bf5 gf5 33.fe5 Nd3 34.ed6 cd6 35.Nd4 Nf4 36.Rf4 Re8 37.Ne6 Rg5 38.Ng5 Re3 39.Ne6 Rc3 40.Raf1 Kd7 41.Rf5 Rc4 42.Rf7 Ke8 43.Rf8 Ke7 44.R1f7# 1–0. lican – akrycz, kurnik, 2012.

4.e4 Nf6 5.Nc3 Bb7 =.

4.e4 Nf6 5.e5 Nd5 6.c4 Nb4? (better is 6...Ne7+=) 7.a3+– Bc5 (7...N4c6 8.bc6 Nc6 9.Nf3+–) 8.ab4 Bb4 9.Bd3 c6 (9...Bb7 10.Qg4 Bf8 11.Be4+–) 10.Qg4 c5 (10...g6+–) 11.Qg7 Rf8 12.Nf3 (better is 12.Be4 Ra7 13.Nf3 h6+–) 12...h5 13.Ng5 Qe7 14.Nh7 h4 15.Nf8 Qf8 16.Qf8 Kf8 17.h3 Bb7 18.0–0 d5 19.ed6 Nd7 20.f4 a4 21.f5 e5 22.Bc2 f6 23.Ra4 Kf7 24.Ra8 Ba8 25.Re1 e4 26.Be4 Be4 27.Re4 Ne5 28.Be5 fe5 29.Re5 Kf6 30.Re8 Kf5 31.d7 Kf4 32.d8Q Kg3 33.Qg5# 1–0. Fabbri (1765) – jordan2delta, internet, 2006.

4.e4 Nf6 5.e5 Ne4 6.d3 Nc5 7.d4 +=.

4.Nf3 Bb7 5.e3 (--> 3.e3 Bb7 4.Bb2 e6 5.Nf3).

3.Bb2 f6

4.a4 c6 5.c4 (5.e4 Bb7+=) 5...cb5 6.cb5 d5 7.e3 Qd6 (7...e5 8.d4 Bb4 9.Nd2=) 8.Nf3 Qb4 (8...e5 9.Ba3 Qd8 10.Ne5 Ba3 11.Qh5 Ke7 12.Ng6 hg6 13.Qh8+–) 9.Bc3 Qe4 10.d3 Qf5 11.Be2 Nh6 12.0–0 Qh5 (12...e5 13.e4 Qd7 14.Bd2+=) 13.Qb3 (13.Bd4 Nd7+–) 13...Bg4 (13...Nd7 14.Bd4+/–) 14.Nbd2 (14.h3 Bd7+–) 14...Nd7 (better is 14...Qf7!?+/–) 15.h3+– Bf3 (15...Be6 16.Nd4 Qf7 17.Ne6 Qe6 18.Bh5 g6 19.Bf3+/–) 16.Bf3 (16.Nf3?! e6+/–; worse is 16.gf3 Nc5 (worse is 16...Qh3 17.Qd5 Rc8 18.Rfc1=) 17.Qa2 Rc8+=) 16...Qf5 17.Qd5 Qd5 18.Bd5 +–. Trkn – Baron_Samedi, itsyourturn.com, 2000.

4.Nc3 d5 5.e4 (5.Nf3 a4 (5...d4 6.Na4 e5 7.e3 c5 8.Bc4 Bd6 9.0–0+=) 6.e4 d4 7.Nb1 e5 8.Bc4 a3 9.Bc1=; 5.d4 e6 (5...Bf5 6.f3 e6 7.e4 Bg6 8.Bd3 de4 9.Ne4+=) 6.e4 de4 7.Ne4 Bb7 8.Qh5 g6 9.Qe2+=; 5.e3 e6 (5...e5 6.d4 ed4 7.Qd4 Ne7 8.0–0–0 Be6 9.Be2+=) 6.Nf3 Bd6 7.d4 Ne7 8.e4 0–0 9.Bd3+=) 5...d4 6.Nd5 a4 7.Bc4 a3 8.Bc1 Ra4 9.Bb3 +=.

4.Nc3 e6 5.e4 (5.Nf3 a4 (5...Bb7 6.e4 a4 7.a3 Bd6 8.Qe2 Nh6 9.Qc4+=) 6.a3 d5 7.e3 Bd6 8.Qe2 Ne7 9.e4=; 5.a3 Ne7 (5...d5 6.e3 e5 7.d4 ed4 8.Qd4 Be6 9.Rd1+=) 6.e4 d5 7.d4 f5 8.e5 Ng6 9.Nf3+=; 5.e3 d5 (5...Bb7 6.Nf3 a4 7.a3 Nh6 8.Bc4 Be7 9.0–0+=) 6.Bd3 Nh6 7.Nge2 e5 8.e4 d4 9.Nd5+=) 5...d6 (5...Bb7 6.Bc4 a4 7.a3 Nh6 8.d4 Nf7 9.Qe2+=; 5...a4 6.a3 Bb7 7.Nf3 Be7 8.d4 Nh6 9.Bc1+=) 6.Nh3 (6.Bc4 c6 7.bc6 Nc6 8.Bb5 Bd7 9.Nf3+/–) 6...Ne7 (6...a4 7.Bc4 Qe7 8.Nf4 a3 9.Bc1+/–) 7.Bc4 (7.Qh5 g6 8.Qf3 Nd7 9.e5+/–) 7...Nd7 (7...c6!?+/– 8.bc6 Nbc6 9.Nf4+/–) 8.Nf4 (8.Be6 Ne5 9.Nf4+– 1.88) 8...Nc5 9.d4 d5 (9...e5 10.dc5 ef4 11.Nd5+–) 10.ed5 (10.dc5?! dc4 11.Qh5 g6+–) 10...ed5 11.Ncd5 (11.dc5?! dc4 12.Qd8 Kd8 13.0–0–0 Ke8+–) 11...Nd5 12.Bd5 Bb7 (12...Nb7 13.Qf3 Rb8 14.Bc6 Bd7 15.0–0–0+– (worse is 15.Bb7 Qe7 16.Kd1 Qb4+–)) 13.dc5 Bd5 14.Nd5 Be7 (14...Bc5 15.Qe2 Kf7 16.0–0–0+–) 15.Qh5 g6 16.Qf3 Rf8 (16...0–0 17.0–0–0 bc5+–) 17.0–0–0 Bc5 18.Nf6 1–0. marekt – 2buddies, ChessWorld.net, 2016.

3.Bb2 Nf6

4.e3 Bb7 5.Nf3 (--> 3.Bb2 Bb7 4.e3 Nf6 5.Nf3).

4.e3 d5 5.Nf3 Nbd7 6.c4 Bb7 7.Nc3 e6 8.cd5 ed5 9.d4 Bb4 10.a3 Bc3 11.Bc3 0–0 12.a4 Re8 13.Bd3 Ne4 14.Bb2 Rc8 15.Rc1 Qe7 16.0–0 f5 17.Qb3 Ndf6 (17...Qb4 18.Bc2+=) 18.Ne5 (18.Ba3!? Qe6 19.Ne5+/–) 18...Nd2= 19.Qc2 Nf1 20.Kf1 (20.Bf5!? Ne3 21.fe3=) 20...g6+= 21.Nc6 Bc6 22.Qc6 Qd6 (22...Qe6!?–/+) 23.Qd6= cd6 24.Ke1 (24.Rc6 Rc6 25.bc6+=) 24...Rc1–/+ 25.Bc1 Kf7 26.f3 f4 27.Kf2 fe3 28.Be3 Rc8 29.Bd2 Ng8 30.g3 Ne7 31.g4 Kf6 32.h4 Ng8 33.Bg5 Kg7 34.Bd2 Nf6 35.Kg3 Ne8 36.f4 (36.Kf2 Kf7+=) 36...Nf6–/+ 37.Kf3 Kf7 38.Ke3? Ng4–+ (38...Ng4 39.Kf3 Nf6–+) 0–1. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

4.Nf3 Bb7 5.e3 (--> 3.Bb2 Bb7 4.e3 Nf6 5.Nf3).

4.Nf3 e6 5.e3 Bb7 6.Be2 Be7 7.c4 c5 8.0–0 0–0 (8...d5 9.cd5 Qd5 10.Nc3 Qf5 11.d4 0–0= 0.25; 8...Qc7 9.d3 0–0 10.Nbd2 d6 11.e4 Nbd7= 0.12) 9.Nc3 (9.d4 d5 10.Nbd2 Nbd7 11.Rc1 Rc8= 0.03) 9...Qc7 (9...d5 10.cd5 Nd5 11.Qa4 Nd7= 0.06) 10.Qc2 (10.d4 cd4 11.Qd4 d6+= 0.34) 10...d5 (10...Ng4 11.Ne4 f5= 0.19) 11.d3 (11.cd5 ed5= 0.22) 11...Nbd7 (11...Bd6= 0.12) 12.h3 Rad8 13.Rfd1 Ne8 (13...d4 14.ed4 Bf3 15.Bf3 cd4 16.Ne4=) 14.cd5 ed5 15.Rac1 Nef6 16.Na4 Rfe8 17.d4 c4 18.Ne5 Bd6 19.Nd7 Qd7 20.Nb6 Qb5 21.Na4 Rc8 22.Rb1= Ne4 23.Bc3 Bb4 24.Bb4 ab4+= 25.Nc3 Qa5 26.Ne4 Re4 27.Bf3 Re7 28.a4?? ba3 29.Ra1 Bc6 30.Ra2 Ba4 31.Ra3?? Bc2–+ 32.Ra5 Bd1 33.Rd5?? Bf3 34.gf3 c3 0–1. NN – Fritz 6, 2008.

3.c4 Bb7

4.Bb2 e6 5.e3 Nf6 6.Nf3 g6 7.d4 Bg7 8.a4 0–0 9.Be2 d5 10.Nbd2 Nbd7 11.0–0 c5 12.cd5 (12.bc6 Bc6 13.Rc1 Rc8+=) 12...Nd5 13.Qb3 (13.Nc4 Qc7+=) 13...Rc8 14.Rac1 Nb4 15.Nc4 Bd5 16.Qa3 cd4 17.Ncd2?? (better is 17.Bd4 Bd4 18.ed4=) 17...de3–/+ 18.fe3 Nc2–+ 19.Qd3 Bb2 20.Rc2 Bg7 21.Rfc1 Nc5 22.Qa3 Qe7 23.Nd4 Ne4?? 24.Qe7+– Rc2 25.Rc2 Bf6 26.Qa7 Nc5 27.Qb6 Na4 28.Qa5 e5 29.Qa4 ed4 30.ed4 Kg7 31.Bf3 Be6 32.d5 Bf5 33.Rc7 Rd8 34.Qa7 Rf8 35.Be4 Be5 36.Bf5 Bc7 37.Qc7 gf5 38.d6 Kf6 39.b6 f4 40.b7 f3 41.b8Q (41.b8Q Rb8 42.Ne4 Kf5 43.Qb8 f2 44.Kf2 Ke4 45.d7 h6 46.d8Q h5 47.Qb1 Ke5 48.Qb5 Ke4 49.Qh4; 41.Qe7 Kg7 42.d7 f2 43.Kf2 Kg6 44.Qf8 Kg5 45.d8Q Kg6 46.Qg8 Kf5 47.Qh7 Ke5 48.Qe4) 1–0. ludice (1715) – fakazer (1675), kurnik, 2011.

4.Bb2 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 b6 4.c4 Bb7).

4.Nc3 c6 5.d4 d5 6.bc6 Bc6 7.cd5 Bd5 8.e4 Bb7 9.Nf3 Na6 10.Bb5 1–0. marus1 – patterson, internet, 2001.

4.e3 d5 5.cd5+= Qd5 6.Nc3 Qd7 7.Bb2 Nf6 8.Nf3 e6 9.Be2 Be7 (9...Bd6 10.0–0=) 10.0–0 (10.Ne5 Qd6 11.Bf3 Bf3 12.Qf3 Ra7+=) 10...0–0 11.a4 c5 12.Ne5 Qc7 13.f4 Bd6 (13...Nbd7 14.Nc4=) 14.Nc4 Nbd7 15.Bf3 Be7 16.Qe2 Bf3 17.Rf3 Rad8 18.Rh3 (18.e4 Rfe8+=) 18...Rfe8 19.g4 (19.d3 Nd5=) 19...h6 (19...Nd5!?=) 20.g5+= hg5 21.fg5 Nh7 22.Qh5 Ndf8 23.Ne4 Rd5 24.Rg3 (24.Rf1 Bg5 25.Ne5+=) 24...Qd8 (24...Ng6 25.Rf1 Red8 26.Bg7 Kg7 27.Rf7 Kf7 28.Qh7 Kf8 29.Nf6 (29.Qg6 Rf5 30.Rh3 Rg5 31.Ng5 Qg3 32.hg3 Bg5 33.Rh8 Ke7 34.Qg7) 29...Bf6 30.Qc7+–) 25.Rf1 (better is 25.Ne5!? g6 26.Qf3 Re5 27.Be5+–) 25...Rf5+= 26.Rf5 ef5 27.Ne5 (27.Nc3 Ng5 28.h4 Nge6+=) 27...Qd5=+ (27...fe4?? 28.Qf7 Kh8 29.Ng6 Ng6 30.Qg7) 28.Nf6 Bf6 29.gf6 Nf6 30.Rh3?? (better is 30.Qg5 Nh5 31.Qh5 Re5 32.d3+/–) 30...N8h7 (better is 30...Nh5 31.Rh5 Qd2 32.Rf5 Qb2–+) 31.Nf3?? (31...Nh5 32.Be5–+; better is 31.Qf5 Qd2 32.Nc4 Qd1 33.Qf1 Qa4 34.Nb6–+). Markus,Roland – Wartig,Wolfgang, corr SOK–89–41, 1990.

4.e3 e5 5.Bb2 d6 6.d4 c6 7.de5 cb5 8.cb5 Nd7 9.ed6 Nc5 10.Nf3 Nf6 11.Be2 Bd6 12.Na3 Nce4 13.Nc4 Bb4 14.Kf1 Qe7 15.Nb6 Nf2 16.Bf6 Nd1 17.Be7 Ne3 18.Kf2 Ke7 19.Na8 Nd5 20.Rac1 Ba8 21.Nd4 Bd2 22.Nc6 Kf6 23.Rcd1 1–0. Heinola – Paavilainen, Turku 1984.

4.e3 e5 5.Bb2 e4 6.Ne2 =.

4.e3 e6 5.Nf3 d5 6.Bb2 c5 7.d4 Nf6 8.Nbd2 Nbd7 9.Be2 Bd6 10.0–0 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0–0 8.0–0 b6 9.d4 Bb7 10.Nbd2 a5).

4.Nf3 d6 5.d4 Bf3 6.ef3 c5 7.d5 h6 8.Bb2 Qc8 9.Bd3 e6 10.0–0 ed5 11.Re1 Be7?? (Better is 11...Ne7 12.cd5 Nd7+–) 12.Bg7 d4 13.Bh8 Kf8 14.Qe2 Ra7 15.Nd2 f5 16.Qe6 Qe6 17.Re6 h5 18.Rae1 Nd7 19.Bf5 a4 20.Ne4 a3 21.Nd6 Ngf6 22.Bf6 Bf6 23.Bg6 h4 24.Nf5 Ne5 25.Re8 1–0. Reuter,Alfred (1615) – Borup,John, KO–002 VCC, 2000.

4.Nf3 Nf6 5.e3 g6 6.Nc3 Bg7 7.d4 d6 8.Be2 0–0 9.0–0 Nbd7 10.Nd2 e5 11.Bf3 Bf3 12.Nf3 Re8 13.h3 ed4 (13...Qe7 14.Qb3=) 14.ed4+= (14.Qd4?? Ne4 15.Qd3 Bc3–+) 14...Ne4 15.Ne4 Re4 16.Qd3 Qe7 17.Bg5 Bf6 18.Be3 Re8 19.Rae1 Qd8 20.Re2 R4e7 21.Rfe1 Nf8 22.d5 Nd7 23.Qc2 Nc5 24.Kh1 (24.Nd4 Bd4 25.Bd4 f6+=) 24...Ne4 (24...Re4 25.Bc5 Re2 26.Re2 dc5 27.Re8 Qe8 28.g3=) 25.Bd4 (25.Nd4 Bd4 26.Bd4 Nc5+=) 25...Bd4= 26.Nd4 Nc5 27.Re7 (27.g3 Re2 28.Re2 Re2 29.Qe2 Qf6=) 27...Re7+= 28.Nc6?? (better is 28.Re2+=) 28...Re1–+ 29.Kh2 Qg5 (29...Qg5 30.g3 Ne4–+) 0–1. bla_ner (1915) – yzerman123 (2185), gameknot.com, 2015.

4.Nc3 c5

5.Bb2 Nf6 6.Nf3 g6 (6...e6 7.e3=) 7.e3 Bg7 8.Be2 0–0 9.0–0 d5 10.Nd5 Nd5 11.Bg7 Kg7 12.cd5 Qd5 13.d4 Nd7 14.dc5 (14.Qa4 Rac8+=) 14...Qd1 (14...Nc5!? 15.Qd4 Qd4 16.ed4 Ne6=) 15.Rfd1+= Nc5 16.Ne5 Rfd8 17.Nc4 Nd7 (17...Na4 18.Rac1+=) 18.Rd2 (18.Rd7 Rd7 19.Nb6 Rd2 20.Na8 Re2+/–) 18...Kf8 (18...Nc5 19.Rd8 Rd8 20.Nb6+=) 19.Rd7 (19.Rad1!? Ke8+–) 19...Rd7+/– 20.Nb6 Rd2 21.Na8 Ba8 22.Bf3 (22.Bc4 Rc2 23.Bb3 Rb2+–) 22...Bf3+= 23.gf3 Rb2 24.a4 Rb4 (24...e5 25.Kg2+/–) 25.f4 e6 26.Kf1 Ke7 27.Ke2 Kf6 28.Kd3 Kf5 29.Rc1 (29.h3!?+/–) 29...Rb3? (better is 29...Ra4!? 30.Rc7 Ra3 31.Kc4 Kf6+=) 30.Kc4 (30...Rb2 31.Kd4+/–; 30.Rc3!? Rb4 31.Rc4 Rb3 32.Kc2 Ra3+/–) 1–0. Mothes,Rainer – Wartig,Wolfgang, corr SOK–90–61, 1990.

5.e4+= d6 6.d4 cd4 7.Qd4 Nd7 8.Nf3 Nc5 9.Bd3 Nf6 10.h3 (10.0–0 Nd3 11.Qd3 Rc8+=) 10...e5 11.Qe3 Be7 12.0–0 0–0 13.Bc2 Rc8 14.Rd1 Rc7 (14...Qc7!?=) 15.Ne5+/– Qa8 16.Nc6 Bc6 17.bc6 Qc6 18.Nd5 Nd5 19.ed5 Qd7 20.Rb1 Rb8 21.Ba3 b5 22.cb5 (22.Bc5 Rc5 23.Bd3=) 22...Rb5 23.Rb5 Qb5 24.Rb1 Qd7 (24...Qe8 25.Bb2+/–) 25.Rb8+/– Bd8?? (better is 25...Bf8+/–) 26.Bf5!!+– (26...Ne6 27.de6+–) 1–0. Seack,Ingo – Wartig,Wolfgang, corr SOK–92–88, 1992.

4.Nc3 e6

5.e3 d5 6.cd5 ed5 7.Nf3 Nf6 8.Bb2 (8.d4 c5+=) 8...c5 (8...Bd6 9.Rc1=) 9.bc6+= Nc6 10.Nb5 (10.Bb5 Bd6+=) 10...Rc8 11.Be2 Be7 12.0–0 0–0 13.Rc1 Nb4 (13...Re8 14.Nfd4=) 14.a3+= Na6 15.Rc8 Qc8 16.Qb1 Nc5 17.Rc1 Qe8 18.Bf6 Bf6 19.Nd6 Qc6 20.Nb7 (20...Qb7 21.Rc5+–) 1–0. Brinkmann,Wilhelm – Wartig,Wolfgang, corr SOK–89–41, 1989.

5.e3 g6 6.Bb2+= Bg7 7.d4 c5 (7...Nf6!?=) 8.dc5+= bc5 9.Qd6 Ne7 (9...Qe7 10.Rd1+/–) 10.Qc5 (10.Rb1 0–0+/–) 10...0–0 (10...d6 11.Qg5+/–) 11.Qd6 Nf5 12.Qd3 Nh4 13.e4 f5 14.Rb1 fe4 15.Ne4 Rf4 16.Nd6 (better is 16.f3!?+–) 16...Bg2+= 17.Qg3 Bh1 (17...Rf3 18.Nb7 Qe7–+ (18...Rg3 19.Nd8 Rb3 20.ab3 Bh1 21.Bg7 Kg7 22.c5+/–)) 18.Qf4+/– Nf5 19.Bg7 Kg7 20.Nf5 (20.c5 Nd6 21.Qe5 Qf6 22.Qf6 Kf6 23.cd6 Ke5=) 20...gf5 (20...ef5 21.Qd4 Kg8 22.c5+/–) 21.Nf3 (21.Qg3 Kh8+/–) 21...Bf3 22.Qf3 Ra7 23.b6 (23...Ra6 24.c5+–) 1–0. Gross,Wilhelm – Wartig,Wolfgang, corr SOK–92–80, 1992.

5.e3 Nf6

6.Bb2 =.

6.Nf3 Bb4 7.Be2 =.

6.Nf3 d5 7.Bb2 Bd6 8.d4 0–0 9.a4 Nbd7 10.Be2 dc4 11.Bc4 Ne4 12.Ne4 Be4 13.d5 Bb4 14.Ke2 Bf3 15.gf3 e5 16.Rg1 Qh4 17.Qc2 Bd6 18.Rg4 Qe7 19.Rag1 g6 20.h4 f5 21.Rg5 Kf7 22.Bd3 Rg8 23.Bf5! gf5 24.Rf5 Nf6 25.Rgg5 Rg6 26.f4 Rg5 27.fg5 Qd7 28.Rf6 Kg7 29.Qf5 1–0. Nicklich – Otte, corr DDR–M–618 1980.

6.Nf3 d5 7.Bb2 Bd6 8.d4 0–0 9.Bd3 dc4 10.Bc4 Nbd7 11.0–0 c5 12.dc5 Nc5=+ 13.a3 Rc8 14.h3 Nce4 15.Ne4= Be4 16.Qd4 Qc7 17.Rfc1 Bc5 18.Qe5 Bf3 19.Qc7 Rc7 20.gf3 Rd8 21.Bb3 Rcd7 22.a4 ½–½. Rosner,Dirk – Wartig,Wolfgang, corr SOK–91–77, 1991.

6.Nf3 d5 7.Bb2 Nbd7 8.d4 Bb4 9.a3 Bc3 10.Bc3 0–0 11.Bb2 Ne4 12.cd5 Bd5 13.Rc1 Rc8 14.Bd3 Ng5 (14...f5!?=) 15.Nd2+/– f5 16.0–0 Nf6 17.f3 Qe7 18.Qe1 c5 19.e4 fe4 20.fe4 Bb7 21.Qe3 Nd7 22.Rf8 Rf8 23.Qg3 e5 24.Bc4 Kh8 25.de5 Ne4 26.Ne4+– Be4 27.Rd1 Rd8?? 28.e6 Nf6 29.Rd8 Qd8 30.e7! (30…Qd1 31.Bf1+–) 1–0. marekt – unikum, ChessWorld.net, 2004.

4.Nc3 Nf6

5.Bb2 e5 6.e4 (6.Nf3!?+=) 6...Bb4= 7.f3 d6 8.Nge2 Nbd7 9.a3 Bc3 10.Nc3 Nc5 11.g3 (11.Be2 Nh5 12.g3 0–0=) 11...h5 12.Be2 h4 13.Kf2 Nh5 14.Nd5 Bd5 15.cd5 Qg5 16.g4 Nf4 17.d4 ed4 18.Bd4 0–0 19.Bc4 Rae8 20.Re1 g6 (20...h3 21.Kg1–/+) 21.Bb2 (21.Kg1 f5 22.ef5 gf5–/+) 21...f5 22.Qd4 Re5 23.ef5 gf5 24.Kf1 (24.Kg1 Nd7 25.Kh1 (25.Re5 de5 26.Qd1 fg4–+) 25...fg4 26.fg4=) 24...Ng6–+ (24...fg4?! 25.Re5 de5 26.Qe5 Qe5 27.Be5+=) 25.Bc1 (25.h3 fg4 26.Qg4 Rf3 27.Qf3 Rf5 28.Re8 Kh7 29.Qf5 Qf5 30.Kg1 Qc2–+) 25...Qf6 26.Re2 (26.Bb2 Re1 27.Re1 Qd4 28.Bd4 fg4–+) 26...fg4 27.Qg4 Rf5 28.Rf2 Ne4 29.Qe4 Qa1 30.Qe6 Kh8 31.Qe3 Rf4 32.Be2 (32.h3 Ne5 33.Be2 Qb1–+) 32...Ne5 (32...h3 33.Kg1–+) 33.h3 Qb1 (33...Qa2 34.Qd2 Qb1 35.Qb2 Qb2 36.Bb2–+) 34.Ke1 (34.Kg1 Rg8 35.Rg2 Rf6–+) 34...R8f7 35.Kd1 (35.Qd2 Re7 (35...Nf3?! 36.Rf3 Rf3 37.Bf3=) 36.Kf1 Rf6–+) 35...Kg8 36.Ke1 Kf8 37.Qc3 (37.Rf1 Qc2 38.Rf2 R4f6–+) 37...Rg7 38.Rf1 (38.Qe3 Rff7–+) 38...Rg2 39.Rf2 (39.Qe3 Rf7 40.Kd1 Qa2 41.Qh6 Ke8–+) 39...Rg3 40.Qe3 (40.Rf1 Rf7–+) 40...Rf7 41.Kd2 (41.Rf1 Rh3 42.Qh6 Kg8 43.Rg1 Rg3 44.Rg3 hg3 45.Qg5 Kf8 46.Qd8 Kg7 47.Qg5 Ng6–+) 41...Rg1 (41...Qa2 42.Ke1 Qd5 43.Rf1 Nf3 44.Bf3 Rff3 45.Rf3 Rf3 46.Qh6 Ke8 47.Qg6 Kd7 48.Qg4 Qe6 49.Qe6 Ke6 50.Bg5–+) 42.Rf1 (42.Qc3 Qa2 43.Bb2 Qd5 44.Qd4–+) 42...Rf1 43.Bf1 Qa2 44.Kd1 (44.Ke1 Nf3 45.Kd1 Qd5 46.Qd3 Nd4–+) 44...Qd5 45.Bd2 (45.Kc2 Rf3 46.Qh6 Ke8–+) 45...Rf3 46.Qh6 Ke8 47.Be2 (47.Bg2 Qb3 48.Ke2 Qb5 49.Kd1 Qb3 50.Ke2 Qc4 51.Kd1 Rg3 52.Qh5 Kd8 53.Qh8 Kd7 54.Qh7 Ke6–+) 47...Ra3 48.Qh8 Kd7 (48...Kd7 49.Bg4 Ng4 50.Qg7 Ke8 51.Qg4 Ra1 52.Ke2 Qb5 53.Ke3 Qe5 54.Kd3 Qg3 55.Qg3 hg3–+) 0–1. cachisss (1940) – yzerman123 (2280), gameknot.com, 2015.

5.Nf3 d6 6.d4 Nbd7 7.Qc2 e5 8.e4 Be7 9.Bd3 0–0 10.0–0 ed4 11.Nd4 Ne5 12.Nd5 Nd3 13.Qd3 Bd5 (13...Nd7!?+=) 14.cd5+/– Ng4 15.Bb2 Ne5 16.Qh3 Nc4 (16...Bf6!?+–) 17.Bc3 Bf6 (17...Ne5 18.f4 Ng6 19.Nc6+–) 18.Nc6 Qc8 (18...Qe8 19.Bf6 gf6+–) 19.Qg3 Ne5 20.f4 (20.Be5?! Be5 21.f4 Ba1 22.Ne7 Kh8 23.Nc8 Bd4 24.Kh1 Rac8+–; 20.Ne5?! Be5 21.Be5 de5 22.Qe5 Qd7+–) 20...Nc6 (20...Qg4 21.fe5 Qg3 22.hg3 de5+–) 21.Bf6 (21.dc6?! Bc3 22.Qc3 Re8+=; 21.bc6?! Bc3 22.Qc3 Qg4+=) 21...g6 22.Qg5 Qd8 23.bc6 Qf6 24.Qf6 Rfe8 25.e5 de5 26.fe5 Rad8 27.Qf7 (27…Kh8 28.d6+–) 1–0. MT – darrellmac (1730), ICC, 2004.

5.Nf3 g6 6.Bb2 Bg7 7.e3 0–0 8.d4 d6 9.Be2 Nbd7 10.0–0 Re8 11.a4 Ne4 (11...Rc8 12.Qd3+=) 12.Qc2 (12.Ne4 Be4 13.Ng5 Bb7+/–) 12...Nc3+= 13.Bc3 e5 14.Qd2 (14.d5 Qf6+=) 14...Nf6 (14...ed4 15.Nd4 Nc5 16.Qb2=) ½–½. Bivens – McCumiskey, corr, 1989.

5.Nf3 g6 6.Bb2 Bg7 7.e3 0–0 8.Be2 d6 9.0–0 Nbd7 10.d4 e5 11.Qb3 e4 12.Nd2 Qe7 13.Rac1 Rfe8 14.a3 Rad8 15.Rfd1 Nf8 16.c5 d5 17.Na4 Qe6 18.Rc3 h5 19.Rdc1 Ng4 20.cb6 cb6 21.Rc7 Rd7 22.Rd7 Nd7 23.h3 Ngf6 24.Rc7 Ba8 25.Qc2 (25.Qc3 Kh7+=) 25...Nf8 26.Nb3 Rd8 27.Nbc5 (better is 27.Qd2+=) 27...bc5–/+ 28.dc5 d4 (28...Rb8 29.Ra7=+) 29.Bd4 Nd5 30.Ra7 Bd4 31.ed4 e3 32.Bc4 (32.Ra5 ef2 33.Kf2 Qe3 34.Ke1 Nf4 (34...Qd4?! 35.Qd3 Qg1 36.Kd2–+) 35.Ra8 Ra8–+ (35...Ne2?! 36.Qe2 Qg1 37.Qf1 Qf1 38.Kf1 Ra8 39.Nc3–/+)) 32...Nd7 33.Ra6 ef2 34.Qf2 Qe3? (better is 34...Qe4!?+/–) 35.Ra8!+– Qf2 (35...Ra8 36.Bd5) 36.Kf2 Ra8 37.Bd5 Rd8 38.c6 Nf6 39.Nc3 Ne8 40.b6 (40...h4 41.c7 Nc7 42.bc7+–) 1–0. Dopper,Johan – Cottarelli,Franco, corr, 1990.

5.Nf3 g6 6.Bb2 Bg7 7.e3 0–0 8.Be2 d6 9.0–0 e5 10.d4 e4 11.Nd2 Re8?! (11...Nbd7) 12.c5! dc5 13.dc5 bc5 = 14.Na4 Nbd7 15.Nb3 Qe7 16.Qc1 c4 17.Bc4 Ng4 18.Bg7 Qd6 19.g3 Kg7 20.Qd1 Nde5 21.Qd6 cd6 22.Be2 Nf3 23.Bf3 ef3 24.Nd4 Rac8 25.Rac1 h5 26.Nb6 Rc5 27.Rc5 dc5 28.Nb3 h4 29.gh4 Rh8 30.h3! Nf6 31.Nc5 Be4 32.Ne4 Ne4 33.Na4! Rh4 34.b6 Ng5 35.Rb1 Rh8 36.Rb5 Nh3 37.Kh2 Nf2 38.Kg3 Ne4 39.Kf3 f5 40.Ra5?? Rh2 0–1. Katalymov – Simagin, 1958.

5.Nf3 e6

6.Rb1 =.

6.Bb2 Bc5 =.

6.Bb2 Be7 7.e3 0–0 8.d4 d6 9.Bd3 Nbd7 10.e4 e5 11.0–0 ed4 12.Nd4 Nc5 13.Nf5 Re8 14.Bc2 Bf8 15.f3 g6 16.Ng3 Bg7 17.Rb1 Qd7 (17...Nfd7!?=) 18.Nd5 Nd5 19.ed5 Bb2 20.Rb2 f5 21.Qd2 Qe7 22.Rbb1 Qe3 23.Rf2 Qd2 24.Rd2 Re3 25.Ne2 Rae8 26.Kf2 Bc8 27.Nf4 Rc3 28.Bb3 a4 (29.Re2 Re5 30.Re5 de5=+) =+. de Visser,Arno – Feilmayr,Erwin, corr ICCF TT, 2004.

6.e3 c5 7.Bb2 d5 8.cd5 ed5 9.d4 c4 10.Be2 Be7 11.0–0 0–0 12.Ne5 Nbd7 13.f4 Bb4 14.a4 Bc3 15.Bc3= Ne4 16.Be1 f6 17.Ng4 Rc8–/+ 18.Rf3 f5 19.Ne5=+ g5 20.Rf1 gf4 21.ef4 Ndf6 22.Qc2 h5 23.Bh4+= Rc7 24.Rf3 Rg7 25.Rh3 Rh7 26.Bf6 Rf6 27.Rh5 Rh5 28.Bh5 Rh6 29.Nf7 Qh4 30.Nh6 Kh7 31.Nf5 Qh5 32.Ng3 Qh4 33.Ne4 de4 34.g3 Qg4 35.Qc4 (35...Kh8 36.Qc7+–) 1–0. Ziese,Gerhard – Wartig,Wolfgang, corr SOK–89–48, 1989.

6.e3 d5 7.Bb2 c5 8.cd5 ed5 9.d4 c4 10.Be2 Bb4 11.0–0 Bc3 12.Bc3 0–0 13.Nd2 Re8 14.Bf3 Qc7 15.Qc2 Nbd7 16.Rfe1 Ne4 17.Ne4 de4 18.Be2 Bd5 19.Rac1 Nf6 20.Qa4 Rec8 21.Bb2 Ne8 22.Rc2 Nd6 23.Ba3 Ra7 24.Rec1 h6 25.Bd6 Qd6 26.Bc4 Bc4 27.Rc4 Re8 28.R1c3 Rb7 29.h3 Ree7 30.Rc6 Qd7 31.Rc8 Re8 32.Re8 Qe8 33.Qc2 Qe7 34.Rc8 Kh7 35.Qc6 f5 36.d5 Rd7 37.Qe6 Qe6 38.de6 Re7 39.Rc6 Rb7 40.a4 Kg6 41.Kf1 h5 42.h4 Kf6 43.Ke2 Rb8 44.Kd2 Rd8 45.Kc3 Rd3 46.Kc4 Rd2 47.Rb6 1–0. Poschmann – Roos, email CTON 1996.

6.e3 Be7 7.Bb2 0–0 8.Be2 d5 (8...e5 9.0–0 e4 10.Nd4+=) 9.0–0 c5 10.bc6 (10.d4 dc4 11.Bc4 cd4 12.Nd4 e5+=) 10...Bc6 11.d4 Na6 12.Ne5+= Bb7 13.Rc1 Ne4 14.cd5 Nc3= 15.Rc3 Bd5 16.a3 Bd6= 17.f4 Nc7 18.Qc2 b5 19.e4 b4 20.Rc7 Be4 21.Qe4 Qc7 22.ab4 ab4 23.Rc1 Qe7 24.Bc4 Be5 25.Qe5 Rfe8 26.d5+– f6 27.Qe3 b3 28.de6 Rec8 29.Bb3 Rcb8 30.Bd5 Ra5 31.Rc7! Qe8 32.Bc6 Rb2 33.Be8 (33...h6 34.Bf7 Kh7 35.e7 Ra1 36.Rc1 Rc1 37.Qc1+–) 1–0. Dopper,Johan – Petersen, corr 3GMM–07, 1995.

6.e3 Be7 7.d4 =+.

4.d4 e6

5.a3 Nf6 =.

5.Bb2 c5 6.d5 ed5 7.cd5 Nf6 8.Nc3 Bd6 9.Nf3 0–0 10.e4 Re8 11.Bd3 Nd5 (better is 11...Ne4!? 12.Ne4 f5+=) 12.Nd5+= Bd5 13.Qc2?? (better is 13.Be2 Be4 14.Qd6 Bf3 15.gf3+/–) 13...Be4 14.Be4 f5 (better is 14...Qe7 15.Nd2 f5+=) 15.Nd2?? (better is 15.Qc4 Kh8 16.Qd5+/–) 15...fe4 16.0–0 Be5 17.Rae1? Bb2–+ 18.Qb2 d5 19.a4 Ra7 20.Re3 Rae7 21.Rg3 Nd7 22.Re1 Nf6?? 23.Qf6+= Kh8 24.Qh4 c4 25.Rh3 h6 26.Rhe3 Qc7 27.Ne4 de4 28.Re4 Re4 29.Re4 Re4 30.Qe4 c3 31.Qe8 Kh7 32.Qe4 Kh8 33.Qe8 Kh7 34.Qe4 g6 35.Qc2 Qc4 36.h4 Qb4 37.h5+/– Kh8 38.hg6 Qb2?? 39.Qf5 Qb4 40.Qf6 Kg8 41.Qf7 (41.Qf7 Kh8 42.Qh7#) 1–0. typ48 – hogar29, kurnik, 2012.

5.Bb2 Nf6 6.Nd2 Be7 7.Qc2 a4 8.a3 0–0 9.Ngf3 c6 10.e3 d5 11.c5 bc5 12.bc6 Nc6 13.dc5 Qa5 14.Bd4 Nd7 15.Rb1 Ba6=+ 16.Bd3 Bd3–+ 17.Qd3 Nc5 18.Qc2 Nd4 19.Nd4 Ne4 20.Rb5?? Qd2 21.Qd2 Nd2 22.Kd2 Ba3 23.Ra1 Bd6 24.Ra2 Rfb8 25.h3 Rb5 26.Nb5 Bf8 27.Nc3 Bb4 28.Kd3 a3 29.Nb5 Kf8 30.Kd4 Ke7 31.Ke5 Ra5 (32.Kd4 Rb5–+) 0–1. Merkl – Wartig,Wolfgang, corr SOK–89–30, 1989.

5.Nc3 Bb4 6.Bb2 a4 7.a3 Bc3 8.Bc3+= Qg5 9.f3 Nf6 10.Nh3 Qh6 11.Qd2 Qd2 12.Bd2 0–0 13.e4 c6 14.Be2 cb5+/– 15.cb5 d5 16.e5 Nfd7 17.0–0 f6 18.f4 h6 19.Bg4 f5 20.Be2 g6 21.Rac1 Rc8 22.Bb4 Nf8 23.Rc8 Bc8 24.Rc1 Nbd7 25.Rc7 Kf7 26.Bd1 Nh7 27.Ba4! Ra4 28.Rc8 Ra7 29.Rc6 Nhf8 30.Kf2+– Nh7 31.Ke3 g5 32.g3 g4 33.Nf2 h5 34.Nd3 Ra8 35.Bd6 Ra5 36.Kd2 Rb5 37.Bb4 Nhf8 38.a4 (38...Rb4 39.Nb4+–) 1–0. Seifert,J – Wartig,Wolfgang, corr SOK–89, 1989.

3.c4 d5

4.d3 dc4=+ 5.d4 (5.dc4 Qd1 6.Kd1 e5=+) 5...e5 6.Nf3 (6.e3 ed4 7.Bc4 Bb4 8.Kf1 Nf6=+) 6...f6 (better is 6...e4 7.Bg5 f6–+) 7.e4 ed4 8.Bc4 Bb4 9.Bd2 Bc5 10.0–0 Bg4 11.Qb3 Ne7 12.Bf7 Kf8 13.Bc4 Nd7 14.Ne1 (14.Rc1 Ne5=) 14...Ne5 15.f3 (15.Nd3 a4 16.Qc2 c6=+) 15...Bh5 (15...a4 16.Qd1 d3 17.Kh1 Bc8=+) 16.Nd3= Nd3 (16...Nc4 17.Qc4 Bf7 18.Qa4=) 17.Qd3 Bf7 18.Kh1 (18.Rc1 c6=) 18...Ng6 (better is 18...c6=+) 19.Na3?? (better is 19.Bf7 Kf7 20.Qb3 Ke8 21.Rd1=) 19...Ne5–+ 20.Qb3 (20.Qc2 Ba3 21.Bf7 Nf7 22.Rad1–+) 20...Qe8?? (better is 20...a4 21.Qc2 Ba3 22.Bf7 Kf7–+) 21.Bf7=+ Qf7 22.Qf7 Kf7–/+ 23.f4 Nd7 24.Nc4 Rhe8 25.a4? Nf8 26.e5–/+ f5 27.Nb2 Ne6 28.Nd3 Be7 29.Rac1 Rac8 30.Rc6 Nd8 31.Rc2 ½–½. calu_mishu (1615) – fantom, internet, 2006.

4.cd5+= Qd5 5.e3 (5.Nc3 Qe6+=) 5...Bb7 (5...e5 6.Nc3 Qc5 7.Qf3+=) 6.Nc3+= Qd8 7.Ba3 Nf6 8.Be2?? (better is 8.d4=) 8...Bg2–+ 9.Bf3 Bf3 (better is 9...Bh1 10.Bh1 Ra7–+) 10.Qf3=+ Nbd7 11.d4 e6 12.Bf8 Nf8 13.Qc6 N8d7 14.Ne4 (14.Nf3!?=) 14...Ne4–/+ 15.Qe4 0–0 16.Nf3 Nf6 17.Qc2 Qd5 18.Ke2? (18.Qc6 Qc6 19.bc6 Rad8=+) 18...Rac8 (better is 18...Qb5 19.Qd3 Qh5–+) 19.Rac1? (better is 19.Qc6!?=+) 19…Qb5–+ (20.Qc4 Qh5–+) 0–1. Woelfelschneider,Peter – Wartig,Wolfgang, corr SOK–91–77, 1991.

4.cd5!? Nf6 5.d4 =.

3.c4 d6

4.Bb2 e5 5.e3 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 b6).

4.e4 Bb7 5.d3 (5.Nc3 Nf6 6.d3 e6 7.Nf3 d5 8.ed5 ed5 9.Qe2=; 5.f3 e5 (5...Nf6 6.d4 e5 7.Ne2 Be7 8.de5 de5 9.Qd8=) 6.Bb2 Be7 7.d4 ed4 8.Ne2 Bf6 9.Nd4=; 5.Qe2 Nf6 (5...e5 6.Nc3 Nf6 7.Nd5 Be7 8.Nf3 0–0 9.d3=) 6.Nc3 e5 7.Nf3 Be7 8.Nd5 0–0 9.d4=) 5...e6 (5...Nf6 6.Nf3 e6 7.Be2 Be7 8.0–0 0–0 9.Nc3+=) 6.Nd2 d5 7.cd5 ed5 8.Bb2 c6 9.bc6 =.

4.e4 Nd7 5.d4 (5.Nc3 e5 (5...Ngf6 6.d4 e5 7.Nf3 ed4 8.Nd4 Nc5 9.f3+=) 6.Nf3 Ngf6 7.d4 ed4 8.Nd4 Nc5 9.f3+=; 5.Nf3 Ngf6 6.Nc3 Nc5 7.d3 e5 8.Be2 Be7 9.0–0=; 5.Be2 Ngf6 (5...e5 6.Nf3 Ngf6 7.Nc3 Be7 8.d4 0–0 9.0–0+=) 6.d3 e5 7.Nf3 Be7 8.0–0 0–0 9.Nc3=) 5...Ngf6 (5...e5 6.Nf3 ed4 7.Nd4 Nc5 8.Nc3 Qh4 9.g3+=) 6.Bd3 e5 7.Nf3 ed4 8.Nd4 Nc5 9.Nc3 +=.

4.e4 e5 5.Be2 (5.Nf3 Nf6 (5...Be7 6.Nc3 Nf6 7.Be2 Nbd7 8.d4 0–0 9.0–0+=) 6.Nc3 Be7 7.Be2 Nbd7 8.d4 0–0 9.0–0+=; 5.Nc3 Nf6 (5...Be7 6.Nf3 Nf6 7.Be2 Nbd7 8.d4 0–0 9.0–0+=) 6.Nf3 Be7 7.Be2 Nbd7 8.d4 ed4 9.Qd4=; 5.d4 Nf6 (5...ed4 6.Nf3 Be7 7.Nd4 Bf6 8.Be2 Ne7 9.0–0+=) 6.de5 de5 7.Qd8 Kd8 8.Nc3 Bb4 9.Bd2=) 5...g6 (5...Nf6 6.Nc3 Nbd7 7.Nf3 Be7 8.d4 0–0 9.0–0+=; 5...Be7 6.Nf3 Nf6 7.Nc3 Nbd7 8.d4 0–0 9.0–0+=) 6.Nf3 h5 (6...Nf6 7.Nc3 Bg7 8.0–0 0–0 9.d3+=) 7.d3 (7.0–0 g5 8.d4 g4 9.Ne1+=) 7...Qe7 (7...Bh6 8.Nbd2 Nf6 9.0–0+=) 8.Ba3 (8.Nc3 Nf6+/– (8...Bh6 9.Nd5+/–) 9.Bg5+/–) 8...Nh6 (8...Nf6 9.0–0+=) 9.h3 (9.Nc3+/–) 9...f5 10.Nc3 Be6 11.ef5 (11.Bc1 Bg7+/–) 11...Nf5+= 12.Ne5 (better is 12.Bb2+=) 12...Qh7?? (better is 12...Qf6–/+) 13.Nc6 (13.Bf3!? Ra7 14.Nc6 Nc6 15.Bc6 Bd7 16.0–0+–) 13...Nc6+/– 14.bc6 Nd4 15.Bf3 Nf3 (15...Qf7 16.Be4+=) 16.Qf3+/– (16.gf3?! Bg7 17.Bb2 0–0+=) 16...Qf7 17.Qf7 Bf7 18.Nb5 0–0–0 19.0–0 Bg7 20.Rae1 Rde8?? (20...Rhe8 21.Bc1+/–) 21.Rd1?? (21.Bd6 cd6 22.Nd6 Kb8 A) 23.Ne8?! Be8 24.Re6 Bc3+–; B) 23.Re8 Be8 24.c5 Bc6–/+ (worse is 24...bc5 25.Rb1 Kc7 26.Ne8 Re8 27.Rb7 Kc6 28.Rg7+=); C) 23.Nf7+–) 21...Re2 (21...Re7 22.Rb1+=) 22.Rfe1 Ra2?? (better is 22...Rhe8 23.Re2 Re2 24.Bd6 cd6 25.Nd6 Kc7 26.Nf7 Bd4+=) 23.Re7+– Rf8 (23...Be8 24.Rc7 Kd8 25.Bd6 Bf8+–) 24.Rc7 Kd8 25.Ra7 (25.Rd7 Kc8 26.Bd6 Rf2 27.Na7) 25...Be6+– 26.Ra8 (better is 26.Nd6 Rf7 27.Nf7 Bf7 28.Be7 Ke8+–) 26...Ke7 27.Bd6 Kf7 28.Bf8 Bf8 29.c7 Bg7 (29...Bf5 30.c8Q Bc8 31.Rc8+–) 30.c8Q Bc8 31.Rc8 Ra1 (31...Rc2 32.Rc6+–) 32.Rc7 Kg8 (32...Kf8 33.Ra1 Ba1 34.Rb7+–) 33.Rg7! (33.Rg7 Kg7 34.Ra1+–) 1–0. RisingFast – 2buddies, ChessWorld.net, 2016.

4.e4 Nf6 5.Nc3 (5.d3 e5 (5...Nbd7 6.Nf3 e5 7.Nc3 Be7 8.Be2 0–0 9.0–0=) 6.Nf3 Be7 7.Be2 Nbd7 8.0–0 0–0 9.Nc3=; 5.f3 e5 (5...Nbd7 6.Kf2 e5 7.d4 Be7 8.Bd3 0–0 9.Ne2=) 6.d4 ed4 7.Qd4 Be7 8.Bd3 Nfd7 9.Qd5=) 5...e5 6.Nf3 Be7 7.Be2 Nbd7 8.d4 ed4 9.Qd4 +=.

3.c4 Nf6

4.Bb2 d6 5.Nf3 e5 6.g3 c6 7.a4 cb5 8.cb5 Be6 9.Bg2 Nbd7 10.0–0 Be7 11.Nc3 d5 12.Ng5 0–0 13.d3 h6 14.Ne6 fe6 15.Bh3 Nc5 16.e3 Qd6 17.Ba3 d4 18.ed4 Qd4 19.Be6?? (19.Ne2 Qd6 20.d4 ed4 21.Nd4+/–) 19...Ne6–/+ 20.Be7 Rf7 21.Bf6 Rf6 22.Ne4 Rf5 23.Qb3 Re8 24.Rac1 Kh7 25.Qc4 Rf3 26.Qd4 ed4 27.Rfd1+/– Ng5 28.Ng5 hg5 29.Rc6 Re2= 30.Kg2 Rff2 31.Kh3 Rh2 32.Kg4 Rh6 33.Rc4 Rd6 34.Kg5 Re5 35.Kf4 Red5 36.Ke4 Kg6 37.Rdc1 Kf6 38.Rc6 Re5 39.Kf4 Rf5 40.Kg4 Rg5 41.Kh4 Rgd5 42.g4 Ke6 43.Kg3 Re5 44.Rd6 Kd6 45.Kf2 Rc5= 46.Ra1 Rc3 47.Ke2 Kc5 48.Kd2? Kb4–+ 49.Re1 Rc7 50.Re6 Kc5?? 51.Rg6 Kb4 52.Rb6 Ka4 53.Rd6 Kb5 54.Rd4 a4 55.Rf4 a3 56.Rf1 Kb4 57.Rb1 Ka4 58.d4? a2–+ 59.Ra1 Kb3 60.d5 Kb2 (61.Ra2 Ka2–+) 0–1. hal1958 – taroak, playchess.de, 2004.

4.Nf3 d6 5.Nc3 e5 6.d4 Nbd7 7.e4 Be7 8.Bd3 Bb7 (8...0–0 9.0–0+=) 9.0–0 0–0 10.Bb2 ed4 11.Nd5 Nd5 12.cd5 Ne5 13.Nd4 Nd3 14.Qd3 Bf6 15.Rac1 Re8 16.Bc3 Re7 (16...Be5 17.f4 Bf6 18.Nf5+/–) 17.Nc6 Bc6 18.Bf6 gf6 19.Rc6+– Qe8 20.Qg3 Kh8 21.Qf3 Re4 22.Qf6 Kg8 23.Rc7 Rd8 24.Rf7!! Qf7 25.Qd8 Re8 26.Qd6 Qb7 27.Qc6 Re7 28.d6 Rd7 29.Rc1 Kf7 30.Qb7 Rb7 31.Rc7 1–0. orane (2015) – ReynaldoMiranda (1695), Live Game Caissa's Web, 2004.

3.d3 Bb7

4.c4 e6 5.Bb2 Nf6 6.e4 d6 7.Nf3 e5 8.Be2 Be7 9.0–0 0–0 10.Nc3 Nbd7 11.Ne1 Nc5 12.f4 ef4 13.Rf4+= Ne6 14.Rf1 Nd7 15.Nd5+/– Nec5 16.Qc2 Ne5? 17.d4+– Ne4 18.Qe4 c6 19.bc6 Bc6 20.de5 de5 21.Ne7 Qe7 22.Qc6 Rac8 23.Qe4 1–0. Fredek (2090) – Guest504764, Freundschaftspartie, 5m + 0s, 2005.

4.e4 d6 5.Bb2 Nd7 6.Nf3 e5 7.g3 Nh6 8.Bh3 Be7 9.0–0 0–0 10.Bc1+= f5 11.Bh6+/– fe4 12.de4 gh6= 13.Nc3 Nc5 14.Qe2 Qe8 15.Nd2 Kh8 16.Bf5 h5 17.h3 Rg8 18.Kh2 Qf7 19.Rg1 Bg5 20.Nc4 Bc8 21.Bc8= Rac8 22.Nd5 Rcf8–/+ 23.Raf1 h4 24.g4 Ne6 25.f3 Bf4 26.Kh1 Bg3 27.c3 Ng5 28.Kg2=+ Ne6 29.Nce3 Nf4 30.Nf4 Bf4 31.Nf5 d5 32.Kh1 de4 33.fe4+/– Qe8 34.Rd1 h5 35.gh5 Rg3 36.Ng3 (36...hg3 37.Qg4+–) 1–0. Fredek (2090) – Guest365873, Freundschaftspartie, 5m + 0s, 2005.

4.e4 e6 =.

3.e3 Bb7

4.a4 e6 5.Bb2 f5 6.Qh5 g6 7.Qd1 Nf6 8.Nf3 Bg7 9.Bc4 d5 10.Ba2 0–0 11.d4 h6 12.0–0 Nbd7 13.Nbd2 Ne4 14.c4 Ndf6 15.Ne5 Kh7 16.Ne4 Ne4 17.f3 Nd6 18.Nc6 (better is 18.Rc1+=) 18...Bc6+= 19.bc6 Nc4 20.Bc4 dc4 21.Rc1 Qd5 22.Qe2 Qc6 23.Rc4 Qd7 24.Rfc1 Rac8 25.Rc6 Rfe8 26.Qc4 Qd5 27.Rc7 Qc4 28.R1c4+/– Rc7 29.Rc7 Kg8 30.Rc6 g5 31.Rb6 f4 32.e4 Rc8 33.h3 Rc2 34.Rb8 Kh7 35.Rb7 Rb2+= 36.Rb2 Bd4 37.Kf1?? Bb2–+ 38.Ke2 e5 39.Kd3 Kg7 40.Kc4 Kf6 41.Kb5 Bc3 42.Kc4 Be1 43.Kd5 h5 44.Kc4 h4 45.Kd5 Bd2 46.Kc6 Ke6 47.Kc5 Bb4 48.Kc6 1–0. erisonpassos – odcd, kurnik, 2011.

4.Bb2 a4 5.a3 c6 6.c4 cb5 7.cb5 e6 8.Nc3 Nf6 9.Na4 d5 10.Nc3 Bc5 11.Nf3 Nbd7 12.d4 Bd6 13.Be2 0–0 14.0–0 h6 15.h3 Nh7 16.Bd3 f5 17.Qc2 Ng5 18.Ng5 Qg5 19.Ne2 f4 20.ef4 Bf4 21.Nf4 Rf4 22.Bc1 Raf8 23.Be3 Qf6 24.Bf4 Qf4 25.g3 Qd4 26.a4 Ne5 27.Be2 Rc8 28.Qd1 Qe4 29.f3 Qe3 30.Kg2 d4 31.Rf2 d3 32.Bf1 Rf8 33.Qd2 Bf3 34.Kh2 Qd4 35.Ra3 Be4 36.Rf8 Kf8 37.Bg2 Bf3 38.a5 ba5 39.Ra5 Kg8 40.Ra2 Be2 41.Qf4 Qf4 42.gf4 Nc4 43.Ra8 Kf7 44.Rd8 Ke7 45.Rd4 e5 46.fe5 Ne5 0–1. barborski – merryxmas1, kurnik, 2012.

4.Bb2 c6 5.a4 c5 6.Nf3 e6 7.c4 Nf6 8.Be2 d5 9.0–0 dc4 10.Bc4 Bd5 11.Be2 Be7 12.Nc3 Bf3 13.Bf3 Nd5 14.Qb3 Nd7 15.Nd5 ed5 16.Bd5 0–0 17.Ba8 Qa8 18.d4 cd4 19.Bd4 Bf6 20.Rad1 Bd4 21.Rd4 Nf6 22.Rf4 Ne4 23.Qd3 Nc5 24.Qd6 Na4 25.Ra4 Rd8 26.Qb6 Rb8 27.Qa5 Qb7 28.Rb1 h6 29.Qa7 Qc8 30.h3 Kh7 31.b6 Qf5 32.Raa1 Qe5 33.b7 g6 34.Qb8 Qb8 35.Ra8 Qe5 36.b8Q Qe4 37.Qh8 1–0. brother – lubomir1974, kurnik, 2012.

4.Bb2 c6 5.c4 cb5 6.cb5 Nf6 7.Nf3 e6 8.Be2 Be7 9.Nc3 d6 10.Na4 Nbd7 11.0–0 0–0 12.Nd4 Rc8 13.Rc1 Nc5 14.Nc3 Qd7 15.Nc6 h6 (15...Bc6!? 16.bc6 Qc6= (worse is 16...Rc6 17.d4+/–)) 16.d4+= Nce4 17.Na4 Bd8 18.f3 Ng5 19.Qb3 Bc6 20.bc6 ½–½. Diviak,Ru (1865) – Schwabik,B (2040), Tatranske Zruby SVK, Tatry Open, 2011.

4.Bb2 c6 5.Nf3 cb5 6.Bb5 Ba6 (6...Nf6!?+=) 7.Nc3+/– Nf6 8.a4 e6 9.0–0 Bb4 10.Qe2 Nc6?? (better is 10...0–0+/–) 11.Ba6+– Bc3 12.Bc3 Ne4 13.Bg7 Rg8 14.Bb2 Nb4 (14...Qc7 15.Bb5+–) 15.Bb7 Nc2 (15...Ng5 16.Ng5 Rg5 17.f4+–) 16.Rac1 Ra7 (16...Nc5 17.Ba8 Nb4 18.d4 Na4 19.Bb7 Nb2 20.Rc8 Qc8 21.Bc8+– (21.Qb2?! Qb7 22.Kh1 Kf8=)) 17.Be4 Nb4 18.Bh7 (18...Rf8 19.Bg7+–) 1–0. MT – plastikbay, ICC, 2004.

4.Bb2 d5 5.Nf3 e6 6.Be2 Nf6 7.0–0 g6 8.d3 Bg7 9.Nbd2 0–0 10.c4 c5 11.Qc2 Nbd7 12.h3 Rc8 13.a3 Re8 14.Rac1 e5 15.cd5 Nd5 16.Nc4 h6? (16...Qe7 17.Nfd2=) 17.Rfd1 (17.Nd6 Qe7 18.Nc8 Rc8+–) 17...Nf8? (better is 17...Re6!?+=) 18.Nce5 c4? (better is 18...Ne6!?+/–) 19.Nc4 Ne6 20.Bg7 Kg7 21.Qb2 Kg8 22.d4 Nf6 23.Nce5 Ne4 24.Rc8 Qc8 25.Rc1 Qd8 26.Nc6 Qd5 27.Bc4 Qf5 28.Bd3 N6g5 29.Ng5 Qg5 30.Be4 Re4 31.a4 Bc8 32.Kh1?? Qf6?? 33.Qc2 Re8 34.Ne5 Be6 35.Qc6 Rc8 36.Qc8 Bc8 37.Rc8 Kg7 38.Rc7 Qd6 39.Rf7 Kg8 40.Rb7 Qa3 41.Rb6 Qa4 42.Rg6 Kf8 43.b6 Qb5 44.Rh6 a4 45.Rh5 a3 46.Ng6 Kg7 47.Rb5 Kg6 48.Ra5 Kf6 49.b7 (49.b7 Ke6 50.b8Q Kf7 51.Ra6 a2 52.Qc7 Ke8 53.Ra8#) 1–0. ejdrzej (1665) – fakazer, kurnik, 2012.

4.Bb2 d5 5.f4 e6 6.Nf3 Nf6 7.Be2 g6 8.0–0 Bg7 9.a4 0–0 10.Na3 c5 11.c4 Nbd7 12.Qc2 Rc8 13.Rac1 d4 14.ed4 cd4 15.Bd4 Nc5 16.Bc5 Rc5 17.d4 Rc7 18.Ne5 (better is 18.Qd2+=) 18...Qd4–/+ 19.Kh1 Qe4 20.Bd3 Qd4 21.Qe2 (21.Be2!?=) 21...Nd7 22.Nc2 Qb2 23.Rb1 Qc3 24.Nd7 Rd7 25.Rfd1 Rfd8 26.Rbc1?? Qf6 27.Be4?? Rd1 28.Rd1 Rd1 29.Qd1 Be4 30.h3 Qf4 31.Qd8 Bf8 32.Qd1 Qf5 33.Nd4 Qh3 (33...Qh3 34.Kg1 Qg2) 0–1. elsh1403 – fakazer, kurnik, 2011.

4.Bb2 e5 5.c4 d6 6.d4 f6 7.d5 Bc8 8.a4 Nd7 9.Nc3 Nc5 10.Nf3 Bg4 11.h3 Bh5 12.g4 Bg6 13.Nh4 Be4 14.f3 Bg6 15.Ng6 hg6 16.Qc2 f5 17.gf5 Qh4 18.Ke2 Qc4 19.Kf2 (better is 19.Kd1!? Qh4 20.fg6+/–) 19...Qh4= 20.Ke2 Ne7 21.fg6 Rh5 22.Ne4 Nf5? (22...Nd5 23.Qc4 Ne4 24.fe4=) 23.Nc5 (23.Rg1!?+–) 23...Ng3+/– 24.Kd3 Nh1?? 25.Ne6 Nf2? 26.Ke2+– e4 27.Nc7 Kd7 28.Ne6 ef3 29.Kd2?? Ne4 30.Kd1 Rc8?? 31.Qd3?? Nf2–+ 32.Kd2 Nd3 33.Kd3 Rd5 34.Nd4–+ Qh6 35.Re1 Qg6 36.e4 Be7 37.Re3 Bf6 38.Rf3 Rcc5 39.h4 Bh4 40.Bh3 Kc7 41.Bf5 Rd4! 42.Bd4 Rf5! 43.Rf5 Qg3 44.Kc4 Bf6! 45.Bf6 gf6 46.Rf6 Qg8 47.Kd3 Qb3 48.Ke2 Qc4 49.Kf2 Qd4 50.Ke2 Qf6 51.Kd3 Qf3 52.Kd4 Qf2 53.Kd5 Qd2 54.Ke6 Qa2 55.Kf5 Qa4 56.e5 de5 57.Ke5 Qb5 58.Ke6 Qc5 59.Kf6 a4 60.Ke6 a3 (60...a3 61.Kf7 a2 62.Kf6 a1Q 63.Kg6 Qag1 64.Kf7 Qf5 65.Ke7 Qe3#) 0–1. waldi1962 – painkillerdrums, kurnik, 2012.

4.Bb2 f6 5.a4 g6 6.Nf3 Bg7 7.Be2 Nh6 8.Nc3 Nf5 9.Bd3 0–0 10.Bf5 gf5 11.d3 Rf7 12.e4 e6 13.ef5 ef5 14.0–0 Bf3 (better is 14...f4!?+/–) 15.Qf3+– (15.gf3?! d5+=) 15...c6 16.Ne2 cb5?? (16...d5+–) 17.Qa8 Nc6 18.Qd8 Nd8 19.Nf4 ba4 20.Nd5 b5 21.Nc7 d5 22.Nb5 Rb7 23.c4 dc4 24.dc4 Nc6 25.Rab1 Kf7 26.Nd6 Kg6 27.Nb7 Nb4 28.Na5 Nd3 29.Nb7 f4 30.c5 f5 31.Bg7 Kg7 32.c6 Ne5 33.c7 a3 34.c8Q (34.c8Q Ng6 35.Nd6 Ne7 36.Rb7 Kf6 37.Qf8 Kg5 38.Qe7 Kg4 39.Qf6 a2 40.Qf5 Kh4 41.Rh7#) 1–0. j1a9n55 – mehmet22, kurnik, 2012.

4.Bb2 Nf6 (--> 3.Bb2 Bb7 4.e3 Nf6).

4.c4 d5 5.cd5 Qd5 (5...Nf6 6.d4=) 6.Nc3+= Qd7 7.Bb2 Nf6 8.Nf3 e6 9.Be2 (9.Ne5 Qd8+=) 9...Be7 (9...Bd6 10.0–0=) 10.0–0 (10.Ne5 Qd6 11.Nc4 Qd7+=) 10...0–0= 11.a4 (11.Ne5 Qd6 12.Nc4 Qd7+=) 11...c5 12.Ne5 Qc7 13.f4 Bd6 (13...Nbd7 14.Bf3=) 14.Nc4 Nbd7 15.Bf3 Be7 16.Qe2 Bf3 17.Rf3 Rad8 18.Rh3 Rfe8 19.g4 (19.d3 Nd5=) 19...h6 20.g5 hg5 21.fg5 Nh7 22.Qh5 Ndf8 23.Ne4 Rd5 24.Rg3 Qd8 25.Rf1 Rf5 26.Rf5 ef5 27.Ne5 Qd5 28.Nf6 Bf6=+ 29.gf6 Nf6 30.Qh6 g6?? 31.Rh3 N8h7 32.Nf3 (32...Qd6 33.Bf6 Qf6 34.Qh7 Kf8 35.d4+–) 1–0. Markus – Wartig,Wolfgang, corr SOK–89–41, 1989.

4.c4 e5 5.Bb2 d6 (5...e4 6.Nc3=) 6.d4 c6 (better is 6...ed4!? 7.ed4 d5=) 7.de5+/– cb5 8.cb5 Nd7 (8...de5!? 9.Qd8 Kd8 10.Be5 Nd7+/–) 9.ed6+– Nc5 10.Nf3 Nf6 11.Be2 (11.Be5 Nfe4 12.Be2 f6+/–) 11...Bd6+= 12.Na3 Nce4 13.Nc4 Bb4 14.Kf1 Qe7 (14...Bd5 15.Bd4 Ng4 16.Bb6+/– (< 16.Nb6 Ngf2 17.Qc2 Nh1–/+)) 15.Nb6 Nf2? (better is 15...Rd8 16.Nd4 Nc3+/–) 16.Bf6+– Nd1 17.Be7 Ne3 18.Kf2 Ke7 19.Na8 (19.Ke3?! Bc5 20.Kf4 Bb6+=) 19...Nd5 20.Rac1 Ba8 21.Nd4 Bd2 22.Nc6 Kf6 23.Rcd1 (23...Bc6 24.Rd2+– (24.bc6 Be3 25.Kf3 Ke5+–)) 1–0. Heinola – Paavilainen, Turku, 1988.

4.c4 e5 5.d4 Bb4 6.Bd2 ed4 7.ed4 =.

4.Bc4 Bg2 5.Qh5 (5.Bd5 Bd5 6.Nf3 d6–+) 5...e6 6.Bb2 (6.Ba3 Nf6 7.Qg5 Bh1 8.Bf8 Rf8–+) 6...Bh1 7.f3 (7.Be2 Nf6 8.Qh4 Bb7–+) 7...d5 8.Bd3 Nf6 9.Qe5 (9.Qh3 c5–+) 9...Qd6 (9...Rg8 10.Qg5–+) 10.Qd6 (10.f4 Qe5 11.fe5 Ne4–+) 10...cd6 (10...Bd6 11.f4–+) 11.Ba3 (11.Kf2 Nbd7 12.Nh3 e5–+) 11...Be7 12.Nc3 e5 (13.Nce2 e4–+; 12...Nbd7!? 13.Nce2 Ne5 14.Kf2–+) 0–1. solidsteel – crenatus, Live Game Caissa's Web, 2005.

4.Nf3 c5 5.bc6 (5.Bd3!?+/–) 5...Nc6= 6.d4 Nf6 7.Ba3 g6 8.Nbd2 e6 (8...Qc7 9.Bb5+=) 9.Bf8= Kf8 10.c4 Kg7 11.Rb1 d6 (11...Rb8 12.Qb3=) 12.Qb3 Qe7 13.Be2 e5 14.0–0 Rhb8 15.Qc3 (15.Qb6? Nb4 16.de5 de5–+) 15...Qc7 16.a3 Re8 17.Qb2 ed4 18.Nd4 Rab8 19.Nb5 Qe7 20.Rfd1 Red8 21.Nf1 Exerts pressure on the isolated pawn (21.Qc3 Re8+=) 21...h5 (21...Kg8 22.Nc3 Ba6 23.Nd5 Nd5 24.Rd5=) 22.f3+= h4 23.e4 Ne5 (23...Qe5 24.Ne3 Qc5 25.Kf2+/–) 24.Qd2 Kg8 (24...h3 25.Ng3 (25.Nd6 Be4 26.fe4 Ne4 27.Ne4 Rd2 28.Rd2 Nc4 29.Bc4 Qe4–+; 25.gh3?! Nh7+/–) 25...Ba6 26.Qg5+/– (worse is 26.Nd6 Kg8+=)) 25.Nd4+= Ba6 The isolani on c4 becomes a target (25...h3 26.gh3 Bc6 27.Ne3+/–) 26.Qg5 d5 (26...Bc4? 27.Bc4 (27.Qh4?! Be2 28.Ne2 Nc4=) 27...Nc4 28.Nc6+–) 27.Nf5 Qc5 28.N1e3 Bc4 29.Qf6 gf5 30.Qg5 Kf8 31.Rbc1 b5 (31...fe4!? 32.fe4 h3+/–) 32.Kh1 fe4 (32...Qa3? 33.Nf5 Ng6 34.Bc4 bc4 35.ed5+–) 33.fe4 Qe7 34.Qh6 Kg8 35.Nf5 Qf8 36.Qg5 Ng6 37.Bh5 Rb6 (37...Qa3 38.Bg6 Qf8 39.Nh6 Kg7 40.Nf7+–; 37...de4? 38.Bg6 fg6 39.Qg6 Kh8 40.Qh5 Kg8 41.Qg5 Kh8 42.Qh4 Kg8 43.Qg5 Kh8 44.Re1+–) 38.ed5 h3 (38...Rd5?? 39.Rd5 Bd5 40.Bg6 fg6 41.Rc8 Qc8 42.Ne7 Kg7 43.Nc8+–; 38...Bd5 39.Bg6 Rg6 40.Ne7 Qe7 41.Qe7 Bg2 42.Kg1 Rd1 43.Rd1 Bf3 44.Kf2 Bd1 45.Qd8 Kh7 46.Qd1+–) 39.Bf3 Rd7 40.Rc3 Qd8 41.Qg4 hg2 42.Bg2 Kf8 (42...Bd5?? 43.Bd5 Rd5 44.Rd5 Qd5 45.Kg1+–) 43.Qh5 Qf6 (43...Bd5?? 44.Qh6 Ke8 45.Bd5 Rd5 46.Re3 Re6 47.Re6 fe6 48.Qg6 Kd7 49.Rd5 ed5 50.Qd6 Kc8 51.Ne7 Qe7 52.Qe7+–) 44.Re1 Rb8 (44...Qc3?? 45.Qh6 Kg8 46.Re8 Nf8 47.Rf8) 45.Qh6 Kg8 46.Rce3 Rf8 47.Qh5 Rd5 (47...b4 48.Qg4 Bb5 49.ab4 ab4 50.Bf1 Bf1 51.Rf1+–) 48.Nh6 Kh7 49.Bd5 Qh4 50.Qf5 Kh6 (50...Bd5 51.Qd5 Kh6 52.Qb5+–) 51.Bc4 Qc4 52.Rh3 Kg7 53.Rg1 Qc7 54.Rf3 Qe7 55.Qb5 (55.Qb5 f5 56.Qa5+–) 1–0. pman3660 (2245) – marekt (2125), gameknot.com, 2015.

4.Nf3 c6 5.a4 Nf6 6.d4 Nd5 7.c4 Nb4 8.Be2 g6 9.Bb2 Bg7 10.0–0 0–0 11.Qd2 cb5 12.ab5 d5 13.c5 Bc8 14.c6 Be6 15.Ne5 Be5 16.de5 f6 17.Na3 fe5 18.Be5 Rf5 19.c7 Qc8 20.cb8Q Rb8 21.Bb8 Qb8 22.Bg4 Re5 23.Be6 Re6 24.Nc2 Nc2 25.Qc2 Qd6 26.Rac1 Kf7 27.Rfd1 Qb4 28.Qd3 Rd6 29.Rb1 Qg4 30.f3 Qe6 31.f4 Qg4 32.h3 Qg3 33.Rf1 d4 34.Rf3 de3 35.Qd6 ed6 36.Rg3 d5 37.Re3 Kf6 38.Rd1 Kf5 39.Rd5 Kf4 40.Kf2 g5 41.g3 1–0. varin123 – wk1234, kurnik, 2012.

4.Nf3 e6 5.c4 d5 (5...Nf6 6.Be2=) 6.Bb2 Nf6 7.Nc3 Bb4 8.cd5 Nd5 (8...ed5 9.Be2=) 9.Nd5 Bd5 10.Be2 (10.Bg7!? Rg8 11.Bb2+/–) 10...0–0= 11.0–0 Nd7 (11...c6 12.a3 Bd6 13.Qa4=) 12.d4 (12.Qc2 Rc8 13.e4 Ba8=) 12...Nf6 (12...c6=) 13.Rc1 (13.Qc2 Be4 14.Bd3 Qd5=) 13...Bd6 (13...Ba2 14.Qa4 Bd5 15.Ne5+=) 14.Ne5 (14.Qa4=) 14...Ne4 (better is 14...Ba2 15.Qa4 Bd5+=) 15.f3+/– Ng5 16.e4 Bb7 17.Nc6 Bc6 18.Rc6 Qe7 (18...f6 19.Qc2 Qd7 20.f4+–) 19.Qb3 (better is 19.e5!? Ba3 20.Ba3 Qa3 21.Qc1+– (21.Rc7?! Qe3 22.Kh1 Rad8+/–)) 19...a4 (19...e5 20.de5 Bc5 21.Kh1+/–) 20.Qc2 a3 21.Bc1+– h6 22.Qc4 Ra5? 23.Bd2+– Ra7 24.e5 1–0. Fournier,Frederic (1630) – Janio (1755), Active, 2006.

4.Nf3 e6 5.Be2 Nf6 6.Bb2 Be7 7.a3 c6 8.c4 cb5 9.cb5 0–0 10.0–0 d6 11.d4 Nbd7 12.Nbd2 Nd5 13.Rc1 N7f6 14.Qb3 a4 15.Qa2 Qd7 16.Qb1 h6 17.Bd3 Rfc8 18.Rc8 (18.Nc4 A) 18...Qb5? 19.Nd6 Rc1 20.Rc1+– (20.Nb5?! Rb1 21.Rb1 Rc8=; worse is 20.Qc1 Qd3 21.Nb7 Rb8–/+); B) 18...Bd8+=) 18...Rc8= 19.Rc1 Nc7 20.Qc2 Nb5 21.Qa4 Rc1 22.Bc1 Bc6 23.Qb3 Nd5 24.a4 Nbc3 25.e4+/– Ba4 26.Qb2?? Nd1–/+ 27.Qa2 N5c3 28.Qc4?? b5 29.Qb4 d5 30.Qa5 b4 31.Qa8 Bf8 32.Ne5 Qe8 33.Qe8 Be8 34.ed5 ed5 35.Bc2 Ba4 36.Ba4 Na4 37.Nb3 Nac3 38.Bd2 Bd6 39.Nd3 Ne2 40.Kf1–/+ Ndc3 41.Be3 h5 42.g3 h4 43.Ke1 hg3 44.hg3 Be7 0–1. Fournier,Frederic (1820) – antonetegalvez (1865), Active, 2011.

4.Nf3 Bf3 5.Qf3+= (5.Qf3 c6 6.Bb2+=). Zdziarski,Zbigniew – Fischer,James, The Kaf University op, 2001.

4.Nf3 Nf6 5.Bb2 (--> 3.Bb2 Bb7 4.e3 Nf6 5.Nf3).

4.Nf3 Nf6 5.g3 d6 6.Bg2 e5 7.c4 Be7 8.Nc3 Nbd7 9.d4 ed4 10.ed4 0–0 11.0–0 Rb8 12.Qc2 h6 13.Be3 Re8 14.Qd2 Ne4 15.Ne4 Be4 16.Bh6 (better is 16.Rfd1=) 16...gh6–+ 17.Qh6 Bf3 (17...d5!? 18.cd5 Bf8–/+) 18.Bf3=+ Bg5 19.Qh5 Qf6 (better is 19...Bf6 20.Bc6 Bg7=) 20.Be4?? (better is 20.Bc6 Nf8 21.Be8 Re8 22.Rfe1 Re1 23.Re1+=) 20...Qg7 (better is 20...Re4 21.f4 Qd4 22.Kh1–+) 21.Qg4?? (better is 21.Bc6 Nf6 22.Qf3=+) 21...Nf6–+ 22.Qf5 Ne4 23.f4 (23.Rae1 Nd2 24.Re8 Re8–+) 23...Bh6 24.Rfe1 (24.Kh1 Qd4 25.Qd5 Qd5 26.cd5 Bg7–+) 24...Ng3 25.hg3 Qg3 26.Kf1 Re1 (26...Qf3 27.Kg1 Bf4 28.Qd5 Be3 29.Kh2–+) 27.Re1 Qf4 28.Qf4 Bf4 29.Kf2 Kf8 30.Kf3 Bg5 31.Rh1 Ke7 32.Kg4 f6 33.d5 Kf7 34.Rh7 Kg6 35.Rc7 Re8 36.Rc6 Re4 37.Kf3 Rf4 38.Kg2 Re4 39.Kf3 Rf4 40.Kg2 Re4 41.Kh3?? Re3 42.Kg4 Re4 43.Kf3= ½–½. slavisa11 – DKPs, Live Game Caissa's Web, 2004.

4.Nf3 g6 5.Bb2 Nf6 6.d4 d6 7.d5 (7.Nc3 Bg7=) 7...Bg7 8.Bc4 Nbd7 9.0–0 Nc5 10.Nc3 e6 11.Rb1 (11.de6 fe6 12.Nd4 d5+=) 11...0–0 12.h3 Qe7 13.Re1 Rae8 14.a3 Qd7 15.Qd2 Nfe4 16.Ne4 Ne4 17.Qd3 Bb2 18.Rb2 Qd8 19.Qd4 Nc5 (19...ed5 20.Bd5 Bd5 21.Qd5+=) 20.Rbb1 (20.e4 e5 21.Qd2 f5=) 20...e5+= 21.Qc3 f5 22.Ba2 g5 23.Qc4 Rf7 24.Rbd1 (24.Nd2 Qf6+=) 24...Ref8 (24...Rg7 25.Nd2+=) 25.Re2 (25.Nd2!?+=) 25...Rg7–/+ Black prepares the advance g4 26.Nd2 (26.Nh2 Qd7–/+) 26...g4 27.hg4 Rg4 28.Qc3 Qh4 29.g3?? (29.f3 Rg7 30.Qc4–+) 29...Rf6–+ 30.e4 (30.Kg2 Rfg6 31.e4–+) 30...f4 (30...f4 31.Rde1 Qh3–+) 0–1. decu40 (1935) – yzerman123 (2335), gameknot.com, 2015.

4.Bb2 c5

5.a4 d5 6.d4 e6 7.Nd2 Nf6 8.Ba3 c4 9.Bf8 Kf8 10.c3 g6 11.Nh3 Kg7 12.Nf4 Qd6 13.h4 Nbd7 14.h5 g5 15.h6 Kf8 16.Nh5 Nh5 17.Qh5 Rg8 18.Nf3 Qe7 19.Be2 Qf6 (better is 19...Nf6!? 20.Qh2 Ne4–/+) 20.Nh2 Qg6 21.Nf3 (21.Qg6 Rg6 22.Bh5 Rg8= (worse is 22...Rh6 23.Ng4 Rf6 24.Nf6 Nf6 25.Rb1+/–)) 21...Qh5 22.Rh5 f6 23.0–0–0 Ke7 24.Nh2 Nf8 25.Rf1 Ng6 26.g3 Kd6 27.Ng4 Raf8 28.f4 f5 29.Ne5 g4 30.Rfh1 Ne5 31.fe5 Ke7 32.Rf1 Rg6 33.Kd2 Rfg8 34.Ke1 Bc8 35.Kd2 Bd7 36.Ke1 Rg5 37.Rh4 Ra8 38.Kd2 Kd8 39.Ke1 Ke8 40.Kd2 Kf7 41.Bg4 Kg6 42.Bd1 Rg3 43.Rf2 Kg5 44.Rfh2 Bb5 (44...Bb5 45.ab5 a4+/–). swislina – walkalone34, kurnik, 2012.

5.a4 d5 6.Nf3 Nd7 7.Be2 Ngf6 8.c4 dc4 9.0–0 e6 10.Bc4 Be7 11.d4 0–0 12.Nbd2 Nd5 13.Qe2 N7f6 14.Rfd1 Rc8 15.dc5 Bc5 16.e4 Nf4–/+ 17.Qe1? Ng4–+ 18.Bf1?! Bf2 19.Qf2 Nf2 20.Kf2 Nd3 21.Bd3 Qd3 22.Bd4?! Be4 23.Bb6 Bf3 24.Nf3 Qe4 25.Ne1 Rc2 (better is 25...Rc4–+). Andre,K – Wartig,Wolfgang, corr SOK–90–61, 1990.

5.Nf3 d5 6.c4 Nd7 7.cd5 Bd5 8.Nc3 Bb7 9.d4 e6 10.d5 ed5 11.Nd5 Ngf6 12.Bc4 Be7 13.Ne7 Qe7 14.0–0 0–0 15.Ng5 h6 16.Nh3 Rad8 17.Qb3 Ne5 18.Rad1 Nc4 19.Qc4 Ne4 20.Nf4 Nf6 21.Qc3 Qe4 22.f3 Qe7 23.e4 Rd7 24.Rd7 Qd7 25.e5 Nd5 26.Nd5 Qd5 27.e6 f6 28.Re1 Re8 29.Qe3 Re7 30.a4 Bc8 31.f4 Re6 0–1. karoo54 – salcesonzacny, kurnik, 2012.

5.Nf3 d5 6.Be2 Nd7 7.0–0 f6 (7...Ngf6 8.c4+=) 8.c4 e5 9.d4 e4 10.Nfd2 Bd6 11.cd5 Bd5 (better is 11...Qc7!?+/–) 12.Nc3+– Bb7 13.Nce4 Qe7 (13...Bc7 14.Bh5 Kf8 15.Qc2+–) 14.Nd6 Qd6 15.Bf3 (15.Nc4!? Qe6+–) 15...Bf3 16.Nf3 (worse is 16.Qf3 Rd8+–) 16...Ne7 17.dc5 Qc5 18.a4 Rd8 19.Ba3 Qf5? (better is 19...Qd5+–) 20.Be7 Ke7 21.Nd4 Qe4 22.Nc6 Kf7 23.Qb3 Kg6 24.Rfd1?? Nc5+/– 25.Qc2?? Rd1 26.Qd1+– Nd3 27.Qf3 Qf3+/– 28.gf3 Re8 29.Kf1 h5 30.Ke2 Nc5 31.f4 h4 32.f3 h3 33.e4 Kh5 34.Ke3 g5 35.fg5 fg5 36.e5 Kg6 37.Ra3 Kf5+= 38.Kd4 Ne6? 39.Kd5+– Nf4 40.Kd6 Re6 41.Kc7 Nd5 42.Kb7 g4?? 43.fg4 Kg4 44.Rd3 Nb4 45.Rd6 Kf5 46.Re6 Ke6 47.Kb6 Nd3 48.Ka5 Nf2 49.b6 Ng4 50.b7 (50.b7 Nh2 51.b8Q+–) 1–0. carocan (1745) – kocurek10, kurnik, 2012.

5.Nf3 d6 6.Be2 Nd7 7.c4 e5 8.d4 e4 9.Nfd2 f5 10.0–0 Ngf6 11.a4 g6 12.Nb3 Bg7 13.Nc3 0–0 14.dc5 dc5 15.Nd5 Nd5 16.Bg7 Ne3 17.fe3 Kg7 18.Qd6 Nf6 19.Rad1 Rb8 20.Qf4 Qe7 21.Rd2 Rbd8 22.Rfd1 Bc8 23.Rd6 Be6 24.Rb6 Rd1 25.Bd1 Bc4 26.Na5 Bf7 27.Rd6 Rc8 28.Nc6 Qe8 29.a5 Bd5 30.a6 Bc6 31.Rc6 Rb8 32.Qd6 Ng4 33.a7 Rb5 34.Rc7 Kh6 35.Qd5 Ne3 36.Qd2 f4 37.Be2 Rb1 38.Kf2 Ra1 39.a8Q Ra8 40.Rc5 Ng4 0–1. druhynejhorsi (1815) – viki930127 (1805), kurnik, 2012.

5.Nf3 e6 6.c4 d5 7.Nc3 g5? (7...Nf6!?=) 8.h3 (better is 8.Nd5!? f6 9.Ng5 fg5 10.Qh5 Kd7 11.Nb6 Qb6 12.Bh8+–) 8...f6 (8...Bg7 9.cd5 Bd5 10.d4+/–) 9.Be2 (9.d4 Ne7+/–) 9...Bd6 (9...d4 10.Na4 d3 11.Bf1+/–) 10.cd5 Qc7? (better is 10...ed5 11.Na4 h6+/–) 11.de6+– Ke7 12.0–0 Bg3 13.fg3 g4 14.Nh4 gh3 15.gh3 Qg3 16.Ng2 Qg2 0–1. Fournier,Frederic (1945) – rihu2009, Active, 2011.

5.Nf3 e6 6.c4 Nf6 7.Be2 d6 8.0–0 Be7 9.d3 Nbd7 10.Nbd2 Rc8 11.Qc2 Qc7 12.Rad1 0–0 13.Rfe1 Qb8 14.Bf1 Bd8 (14...d5=) 15.a4 Bc7 16.Qc3 Rfd8 17.h3 Ne8 (17...d5 18.cd5 ed5 19.Be2=) 18.Qc2 Ndf6 (18...d5 19.cd5 ed5 20.Bc3=) 19.Bc3 (19.d4 cd4 20.ed4 Bf3 21.Nf3 d5+=) 19...d5= 20.Qb2 dc4 21.dc4 Ne4 22.Ne4 Be4 23.Ng5 Bg6 24.Nf3 f6 25.Qc1 Rd1 26.Rd1 Rd8 27.Be2 Qc8 28.Ne1 Bb8 29.Rd8 Qd8 30.Bb2 Qc7 31.g3 Nd6+= 32.Bf3 Kf8 33.Ng2= e5 34.Bd5 Qd7 35.g4 Be4 36.f4 Bd5 37.cd5 e4 38.f5 Nf7 39.Qc4 Qe7 40.h4 Nh6 41.Qe2 Qd7 42.Qd1 Nf7 43.Kf2? h5!–+ 44.Nf4 Bf4 45.ef4 hg4 46.Kg3 Nh6 47.Be5 Nf5 (47...Nf5 48.Kh2 g3 49.Kg1 Nh4–+) 0–1. Bennett,Hilton Petrie – Othman,A Moussa (2340), Asia–chT Genting Highlands, 1998.

5.Nf3 f6 6.c4 e5 7.d4 d6 8.Be2 g6 9.0–0 Bg7 10.Nc3 Ne7 11.d5 0–0 12.Nd2 f5 13.f4 e4 14.Qc2 Nd7 15.Na4 Nf6 16.h3 h5 17.Rae1 Bc8 18.Kh1 Kf7 19.Rg1 Rh8 20.g3 Neg8 21.Rg2 Bd7 22.Kg1 Rb8 23.Kf2 Qc8 24.Reg1 h4 25.g4 fg4 26.hg4 h3 27.Rh2 Ng4?? 28.Bg4+– Bg4 29.Ne4 Bf5 30.Ng5 Kf8 31.e4 Bd7 32.Bg7 Kg7 33.e5 Bf5 34.Qc3 Rh4 35.e6 Nf6 36.Nh3 Bh3? 37.Rh3+– Rf4 38.Ke1 Qd8 39.Rhg3 Qe8 40.Nb2 a4 41.Nd3 Re4 42.Kd1 Rb7 43.Kc1 Rd4 44.Nf2 Re7 45.Qe3 Rc4= (45...Rc4 46.Kb1 A) 46...Qb5?? 47.Ka1 Qe8 48.Qd3+– (worse is 48.Rg6 Qg6 49.Rg6 Kg6 50.Qd3 Kg5 51.Nh3 Kh5 52.Qf5 Kh4 53.Qf6 Kh3+–); B) 46...Nd5?? 47.Rg6 Qg6 48.Rg6 Kg6 49.Qd3 Kf6 50.Qc4+– (50.Qd5?! Rb4 51.Kc2 Re6+=); C) 46...Rb4 47.Ka1 Nd5 (47...Rb5 48.Rh3 Ng8 49.Qc3 Nf6 50.Rgh1 Re6 51.Rh7 Kf8 52.Rh8 Ke7 53.Re8 Ke8 54.de6+–) 48.Rg6 Qg6 49.Rg6 Kg6 50.Qd3 Kf6 51.Qd5 Re6 52.Qf3 Ke7+=). ferminkatcho (1785) – only3min (1825), kurnik, 2012.

5.Nf3 Nf6 6.Be2 d5 7.0–0 Nbd7 8.d3 e6 9.Nbd2 Bd6 10.c4 0–0 11.a3 Qe7 12.Qc2 e5 13.cd5 Nd5 14.Nc4 f6 15.Nd6 Qd6 16.Rac1 Rac8 17.Rfd1 Qe7 18.Nd2 f5 19.Nc4 f4 20.e4 N5f6 21.h3 Ne8 22.Bg4 Nef6 23.Be2 Rcd8 24.Qb3 Kh8 25.Qc3 Rfe8 26.Bf3 Bc8 27.Rd2 Ng8 28.Rdd1 Nh6 29.Bh5 g6 30.Bf3 Nf7 31.Nd2 Kg8 32.Nb1 Nf8 33.Qc4 Ne6 34.Bg4 Nd4 35.Bd4 ed4 36.Bc8= Rc8 37.Nd2 Kg7 38.Nf3 Ne5 39.Ne5 Qe5 40.f3 g5 41.Qc2 Re6 42.Qf2 Rg6 43.Kh1 Rg8 44.Rg1 h5 45.h4 g4–/+ 46.fg4 hg4 47.Rcf1?? Qh5 48.g3–/+ Rf6 49.e5 Rf5 50.gf4 Kh8 51.Qg3 Rgf8 52.Kg2 Rg8 53.e6 Rf6 54.e7 Qe8 55.Re1 Rf7 56.f5 Re7 57.Re7 Qe7 58.Re1 Qb7 59.Kh2 Qf7 60.Qf4 g3 61.Kg2 Qg7?? 62.f6 Qg6?? 63.Re7 White plans f7 63...Rf8 64.f7 Qg7?? 65.h5 Qh7 66.h6 Qg6 (66...Qg6 67.Re8 Kh7 68.Rf8 Qe6 69.Rh8 Kh8 70.f8Q Qg8 71.Q4f6 Kh7 72.Qg8 Kg8 73.Qg7#; 66...Qg7 67.hg7 Kg7 68.Qg5 Kh7 69.Re6 Rf7 70.Rh6#). ejdrzej (1705) – warcraft2 (1920), kurnik, 2012.

5.Nf3 Nh6 +=.

5.f4 d5 6.Nf3 Nd7 7.c4 Ngf6 8.Be2 e6 9.0–0 Be7 10.d4 0–0 11.Ne5 Rc8 12.Nd2 dc4 13.Bc4 Ne5 14.de5 Nd5 15.Qe2 Qc7 (better is 15...f5!?=) 16.e4+/– White intends f5 16...Nb4 (16...Qd7 17.Qd3 Qd8 18.ed5 ed5 19.Bb3=) 17.f5 (17.Nf3 Rfd8+–) 17...ef5+/– 18.ef5 Bd5? (better is 18...Kh8+/–) 19.f6+– Bc4 (19...Rfd8 20.fe7 Qe7 21.a3 Bc4 22.Nc4+– (22.Qc4?! Rd2 23.ab4 Rb2 24.ba5 ba5+=)) 20.Nc4 Bd8 21.Qg4 g6 22.Qh4 Kh8? 23.Nd6 Nd3 24.Qh6 Rg8 25.Rf3 (25.Rf3 Bf6 26.ef6+–) 1–0. carocan (1675) – yelito (1840), kurnik, 2011.

5.f4 d5 6.Nf3 e6 7.Be2 Nd7 8.0–0 f6 9.c4 Bd6 10.d4 Ne7 11.Nbd2 0–0 12.Rc1 Rc8 13.a4 Qe8 14.Nb3 Qf7 15.dc5 Nc5 16.cd5 Na4 17.Bd4 Bd5 18.Rc8 Rc8 19.Nfd2 Nc3 20.Bc3 Rc3 21.Qb1 Re3 22.Nc4 Bf4 23.Ne3 Be3 24.Kh1 e5 25.Qd3 Bf4 26.Nd2 g5 27.Ne4 Kg7 28.g3 Be4 29.Qe4 Bd2 30.Bd3 Qd5 31.Qd5 Nd5 32.Rd1 Bc3 33.Bc4 Ne3 34.Rd7 Kg6 35.Bd3 f5 36.Rd6 Kh5 37.Rb6 e4 38.Bb1 Kg4 39.Rh6 Kf3 40.Rh7 Ng4 41.Rc7 Nf2 42.Kg1 Bd4 43.Kf1 e3 44.Rc2 f4 45.gf4 gf4 46.Ba2 Nd3 47.Bd5 Kg4 48.Ke2 Ne5 49.Rc1 f3 50.Bf3 Nf3 51.Kd3 Nh2 52.Rc4 Kf3 53.Rd4 e2 54.Re4 Nf1 55.Re2 Ng3 56.Ra2 1–0. marvis (1680) – gringonegro (1770), kurnik, 2012.

5.f4 d6 6.Nf3 Nf6 7.Be2 Nbd7 8.0–0 g6 9.h3 Bg7 10.c4 0–0 11.d3 (11.Qc2 d5=) 11...Qc7 (11...Ng4 12.Bg7 Ne3 13.Qc1 Nf1 14.Bf8–/+) 12.Nbd2 (12.e4 e6=) 12...Rad8 (12...Ng4 13.hg4 Bb2 14.Rb1+=) 13.e4 Rfe8 14.g4? White prepares the advance f5 (14.Qc2 Nh5=) 14...e5 (better is 14...Ng4!? 15.Qc1 Ne3–/+) 15.f5 Kh8 (15...gf5!? 16.gf5 d5 17.cd5 Nd5 18.ed5 e4 19.Ne4 Bb2+=) 16.Nh4 g5 17.Ng2 h6 18.Ne3 Kh7 19.Nd5 Bd5 20.ed5 e4 21.de4 Ne4 22.Ne4 (better is 22.Bg7 Kg7 23.Bf3=) 22...Re4?? (22...Bb2!? 23.Rb1 Bd4 24.Nf2 Re5+=) 23.Bd3?? (better is 23.f6 Bf6 24.Rf6 Nf6 25.Bf6 Re3 26.Bd3 Kg8+–) 23...Rde8?? 24.Bg7 Kg7 25.Be4 Re4 26.Re1 Rc4+/– 27.Qd3 Rd4+= 28.Qc3 Ne5 Black intends c4 29.Rad1+= Rd1 30.Rd1 f6 31.a4 c4 32.Qd4?? c3 33.Rc1?? Nf3–+ (33...Nf3 34.Kg2 Nd4–+) 0–1. carocan (1710) – betiber64 (1840), kurnik, 2011.

5.f4 Nf6 6.Nf3 e6 7.c4 d5 8.Be2 Nbd7 9.0–0 Bd6 10.Ne5 0–0 11.Bf3 Rb8 12.Qe2 Re8 13.d3 dc4 14.dc4 Bf3 15.Nf3 Ne4 16.Nbd2 Ndf6 17.Ne4 Ne4 18.Nd2 Nd2 19.Qd2 Be7 20.Rfd1 Bf6 21.Qc2 Qe7 22.Rd2 Red8 23.Rad1 Rd2 24.Rd2 Bb2 25.Qb2 Rd8 26.e4 Rd7 27.Kf2 Qd8 28.Ke3 f6 29.Qc2 h5 30.Rd7 Qd7 31.Qd3 Qd3 32.Kd3 Kf7 33.h4 g5 34.fg5 fg5 35.hg5 Kg6 36.Ke3 Kg5 37.Kf3 h4 38.a3 a4 39.e5 Kf5 40.g4 hg3 41.Kg3 Ke5 42.Kf3 Kd4 0–1. carocan (1605) – anman (1800), kurnik, 2012.

5.h4 d5= 6.Nf3 Nf6 7.c4 e6 8.Rh3 Bd6=+ 9.Nc3 Nbd7 10.a4 Qc7 11.cd5=+ ed5 12.Bd3 Ke7 13.Bf5= Rhe8 14.Qb1 g6 15.Bd7 Nd7 16.h5= Ne5 17.hg6 hg6 18.Ne5 Be5 19.f4 Bd6 20.Rh7 d4 21.Qg6+/– Rf8 22.Ne4 Be4 23.Qe4 Kd7 24.Qd5 Ke7 25.Rc1 (25...de3 26.Qe4 Kd7 27.de3+–) 1–0. Aasum,Anker – Wartig,Wolfgang, corr SOK–90–55, 1990.

4.Bb2 d6

5.a4 e5 6.Nf3 Nf6 7.c4 (7.Nc3 Nbd7=) 7...g6 8.Nc3 Nbd7 9.Be2 Nc5 10.d4 ed4 11.Nd4 (11.ed4 Ne6=) 11...Bg7 (11...Bg2 12.Rg1 Be4 13.Ne4 Nfe4 14.Nf5 gf5 15.Qd5+/–) 12.0–0= 0–0 13.Bf3 Nfe4 14.Be4 Ne4 15.Nd5 Nc5 16.Qc2 f5 17.Nc6 Bc6 18.bc6 Bb2 19.Qb2 Rf7 20.Ra3 Qf8 21.g3 Re8 22.Rd1 g5 23.Rf1 (23.f3 Re6=) 23...Re6 24.f3 Rg6 25.Qb1 Rgg7 26.Qb2 h5 Black intends g4 27.Kh1 g4 28.Ra2 (28.Raa1 Qd8 29.Qc2 Rg5+=) 28...gf3+= 29.Rf3 Ne4 30.Rf4 (30.Qb5 Rg4 31.Rf4 Qe8+=) 30...Qe8+= 31.Qb5 Rg4 32.Rg2 (32.Kg2 Qe6 33.Kh1 Rf4 34.Nf4 Qe8+=) 32...Kh7–/+ 33.Kg1 Ng5 34.Kh1 Nh3 35.Rf1 Qe4 36.Nf4 Nf4 37.ef4 (37.Rf4 Qe3 38.Qd5 Kg6–/+) 37...h4 38.Qd5 Re7 39.Kg1 Kg7 40.Qe4 Re4 (40...fe4?! 41.Kf2=) 41.Rc1 Kf6 42.Kf2 Rg8 (42...Rd4 43.Rc2 Rd1 44.Kf3 Rd3 45.Kf2–+) 43.Kf3 (43.Rgg1!?–/+) 43...hg3–+ 44.hg3 Rge8 45.Rc3 Re1 46.Ra2 R8e4 47.Kf2 Rh1 48.Kf3 Rf1 49.Kg2 Rb1 50.Kf3 Rb4 51.g4 Rb1 52.gf5 Kf5 53.Rh2 Rf1 54.Kg3 Rff4 55.Rh7 Rg4 56.Kh3 Rc4 57.Rf3 Ke6 58.Rc7 Rh4 59.Kg3 Rcg4 (59...Ra4?! 60.Rcf7 Rag4 61.Kf2–/+) 60.Kf2 Rh2 (60...Ra4?! 61.Rb7+=) 61.Kf1?? (better is 61.Ke3 Ra4 62.Rb7–+) 61...Ra4 62.Kg1 Rc2 (62...Rc2 63.Rf1 Rg4 64.Kh1 a4–+) 0–1. marekt (2175) – yzerman123 (2270), gameknot.com, 2015.

5.c4 Nd7 6.Nf3 e5 7.Be2 f5 8.0–0 Ngf6 9.d4 e4N 10.Ng5 Qe7 11.d5 Nc5 12.Bd4 Bc8 (12...g6 13.Nc3+=) 13.Nd2 (13.Nc3 g6+=) 13...g6= 14.f4 (14.Nb3 Bg7=) 14...ef3 15.Ngf3? (15.Bf3 Bh6 16.h4 0–0+=) 15...Bg7 (15...Bh6 16.Nb3–+) 16.h3 (16.Qc2 0–0 17.Rae1 Ng4+=) 16...0–0 (16...Bh6–/+) 17.Rb1? (17.Re1 Bh6 18.Bf1 g5–/+) 17...Bd7 (17...Bh6!? 18.Nb3–+) 18.Ne1 (18.Re1 Bh6 19.Bf1 g5–/+) 18...Rae8 (18...Nfe4 19.Ne4 fe4 20.Rf8 Rf8 21.Bg4–+) 19.Nc2 Nfe4 20.Ne4 Qe4 21.Bf3 Qe7 22.Qd2 Ne4 (22...Be5!?–/+) 23.Be4= Qe4 24.Bg7 Kg7 25.Rf4 Qe7 26.Re1 g5 27.Rf2 Kg6 28.Qd3 Qe4 29.Rd1 (29.Qc3!?=) 29...Qd3–/+ 30.Rd3 Re4 31.Nd4 Rfe8 32.Rf3 h5 33.Kh2? (33.Kf2 h4–/+) 33...h4 (better is 33...g4!? 34.hg4 fg4–+) 34.g3–/+ hg3 35.Kg3 (35.Rg3 Kf6–/+) 35...g4–+ 36.hg4 fg4 37.Rf4 (37.Rf2 Re3 38.Re3 Re3 39.Kf4 Ra3–+) 37...Re3–+ 38.Re3 Re3 39.Kg2 Rc3 (better is 39...a4–+) 40.Nc6?? (40.Ne6 Rc2 41.Kg3 Ra2 42.Rg4 Kf5 43.Rf4 Ke5–/+) 40...Bc6 (better is 40...Kg5 41.Rf8 Rc4 42.Rg8 Kh5 43.Rh8 Kg6 44.Rg8 Kf7–+) 41.bc6 g3 (41...Kg5 42.Rf7–/+) 42.Rf8 Rc4 43.Rc8 Rc5 (43...Kf5 44.Rc7 Ke5 45.Rb7–/+ (45.Kg3? Kd5 46.Rh7 Rc6–+)) 44.Rc7= Rd5 45.Rc8 (worse is 45.Kg3 Rc5–/+) 45...Rc5 46.c7 (worse is 46.Kg3 Kf5–+) 46...Kg7 47.Kg3 b5 48.Rb8 Rc7 49.Rb5 Rc5 50.Rb7 (50.Rb3 Kf7+=) 50...Kf6 51.Kf4?? (51.Rb3 Ke5–/+) 51...Ke6 (51...Rc2 52.a3 Rc3 53.Ke4–+) 52.Ke4?? (52.Rb2 Rc4 53.Ke3 Ke5–/+) 52...Rc4 (better is 52...Rc2–+) 53.Kd3–/+ Ra4 54.Rb2 Ke5 55.Re2 Kd5 56.Rh2?? (better is 56.Rb2–/+) 56...Ra3 0–1. Eremin,Mikhail – Ushakov,Gennady (2230), Ryazan Region, 2010.

5.c4 e5 6.Nf3 Nd7 7.Be2 f5 8.0–0 Ngf6 9.d4 ed4 (9...Bf3!? 10.Bf3 e4+/–) 10.Nd4+– (worse is 10.Qd4 g6+=) 10...Ne4?? (10...g6 11.Ne6 Qc8 12.Nc3+/–) 11.Nf5 (better is 11.Bh5 g6 12.Ne6+–) 11...Qg5 12.Ng3 Ng3+/– 13.hg3 0–0–0 14.Bf3 h5 15.Bb7+– Kb7 16.Nd2 Nc5 17.Qf3 Kb8+/– 18.Qf4 Qe7 19.Nb3 g5 20.Qf3 g4 21.Qe2 Nb3 22.ab3+/– Bg7 23.Rfd1 Bb2= 24.Qb2 h4 25.Rd4 hg3 26.fg3?? Qe3–+ 27.Qf2 Qb3 28.Rg4–/+ Rdf8 29.Rf4 Re8 30.Re1 Reg8 31.Re3 Qd1 32.Qf1 Qd2 33.Re7 Rg3 34.Rff7 Qd4 35.Qf2–/+ Qd1 36.Qf1 Qd4 37.Qf2 Qa1 38.Qf1 Qd4 ½–½. carocan (1690) – latoz (1630), kurnik, 2012.

5.d4 Nf6 6.Nf3 Nbd7 7.g3 (7.Nbd2!?+=) 7...e6 8.Bg2 Be7 9.a4 0–0 10.0–0 Rb8 11.c4 e5 (11...c5!?=) 12.Nbd2 ed4 13.Nd4 Bg2 14.Kg2 Ne5 15.f4 Neg4 16.Nc6?? (16.Qf3 Qd7 17.h3+–) 16...Ne3–+ 17.Kf2?? (17.Kf3 Nd1 18.Bf6–+) 17...Nd1 (18.Rad1 Ng4 19.Kg1 Qd7 20.Nb8 Rb8–+) 0–1. slavisa3 – baretti, Live Game Caissa's Web, 2004.

5.Nf3 Nd7 6.d4 Ngf6 7.Nbd2 e6 8.c4 Be7 9.Bd3 0–0 10.0–0 d5 11.a4 Ne4 12.Qc2 Ndf6 13.cd5 ed5 14.Rfd1 Bd6 15.Ba3 Rc8 16.Ne5 Re8 17.Ndf3 (17.Bd6 cd6 18.Nc6 Bc6 19.bc6 Nf2 20.Kf2 Ng4 21.Kg1 Ne3+=) 17...h6 (17...Ba3 18.Ra3 Qd6 19.Raa1+=) 18.Nc6 (18.Rdc1 Qe7 19.Qb3 Qe6+=) 18...Qd7 (18...Bc6 19.Qc6 Ba3 20.Ra3=) 19.Rdc1 (19.Bd6 Qd6 20.Nfe5 Bc6 21.Qc6 Qc6 22.Nc6 Re6+/–) 19...Ng4= 20.Be4 de4 21.Bd6 Qd6 22.Nfe5 Ne5 23.Ne5+= Re7 24.Qb2 Qe6 25.Ra3 Bd5 26.Rac3 f6 27.Nc4 Bb7 28.Qc2 Qd7? 29.Nb6!+– cb6 30.Rc8 Bc8 31.Qc8 Kf7 32.Qd7 Rd7 33.Rc6 Rb7 34.g4 Ke7 35.h4 Kd7 36.h5 Rc7 37.Rc7 Kc7 38.Kg2 Kd6 39.Kg3 Ke6 40.Kf4 (40.Kf4 Ke7 41.Ke4+–) 1–0. Fournier,Frederic – Goutte,Jean Claude, Open Paris FRA, 2000.

5.Nf3 Nd7 6.Be2 e5 7.0–0 g6 8.d4 Bg7 9.c4 (9.de5 Ne5 10.Ne5 Be5+=) 9...f5 (9...Ne7 10.Qc2+=) 10.de5 (10.Nc3 Ngf6+=) 10...de5 11.Qc2 Be4 (11...Qe7 12.Nc3 Ngf6 13.Rad1=) 12.Qd2 Bb7 13.Rd1 (13.Nc3 Ngf6+=) 13...Qe7+= 14.Nc3 (14.c5 Nc5 15.Bc4 Nh6=) 14...Ngf6= 15.Nd5 Nd5 16.cd5 0–0–0 17.d6 cd6 18.Qd6 Qd6 19.Rd6 Nc5 20.Rad1 Rd6 21.Rd6 Kc7 22.Rd1 Bf3 ½–½. forsetinn (2410) – yzerman123 (2210), gameknot.com, 2015.

5.Nf3 Nd7 6.Be2 e6 7.0–0 Ngf6 8.d4 g6 9.c4 Bg7 10.a4 0–0 11.Nc3 c5 12.Qc2 Rc8 13.Rfd1 d5 14.dc5 Nc5 15.Ba3 Re8 16.Rac1 Qc7 17.Bc5 Qc5 18.Ne5 dc4 19.Nc4 Nd5 20.Ne4 Qc7 21.Ned6 Nb4 22.Qb3 Red8 23.Nc8 Rc8 24.Na5 Qb8 25.Nb7 Qb7 26.Bf3 Qb8 27.g3 Rd8 28.Qb4 Rd1 29.Rd1 Bf8 30.Qe4 Bc5 31.Qb7 Qe5 32.Rd8 Kg7 33.Rd7 Qf6 34.Kg2 h5 35.Qc7 e5 36.a5 e4 37.Be4 Bf8 38.ab6 Qe6 39.Bf3 Bb4 40.Bd5 Qg4 41.Rf7 Kh6 42.Rh7 Kg5 43.Qe7 Kf5 44.Rf7 1–0. elsh1403 – fakazer, kurnik, 2012.

5.Nf3+= e5 6.c4 f5 (6...Ne7 7.Be2+=) 7.Nc3 Nf6 (7...Be7 8.Be2+=) 8.Qc2 (8.d4 Nbd7+=) 8...g6 (8...Qd7 9.Be2+=) 9.0–0–0 (9.Be2 Bg7+=) 9...c6 10.d4 e4 11.Ng5 Qe7 (11...Bc8 12.d5 Bh6 13.Nge4 fe4 14.Ne4+=) 12.bc6 (12.d5 cb5 13.Nb5 Na6+–) 12...Nc6 13.d5 Ne5 14.Ne6 (14.Qa4 Nfd7 15.Nb5 Rc8+=) 14...Rc8= 15.Qb3 Nfd7 16.f4 (better is 16.Qb5!?+=) 16...ef3=+ 17.gf3 Ba6 (17...Nf3!? 18.Nb5 Nde5=) 18.Nb5+= (< 18.Nf8 Rf8 (18...Nf8?! 19.Nb5=+) 19.c5 Nc5 20.Qb6 Bd3–+ (20...Nf3 21.Ba6 Na6 22.Qa6 Qe3 23.Kc2 Qe4 24.Qd3+=)) 18...Bb5 (18...Nc5!? 19.Nc5 Rc5+=) 19.Qb5+/– Rg8 20.Be2 Bh6 (20...Qh4 21.Qa6 Rb8 22.Rdf1+/–) 21.f4 Nf7+= 22.h4 Nd8= 23.Bf3 Kf7 24.Kb1 Nc5 25.Ng5 Kf8 26.Bf6 Qc7 27.h5 Bg5 28.fg5 Nd7 29.Bb2 Ne5 30.Be2 Ndf7+= 31.hg6 hg6 32.Rh7 Nc4= 33.Bc4 Qc4 34.Rf7! Kf7 35.Qd7 Kf8 36.Qd6 Kf7 37.Qe6 Kf8 38.Ba3 Rc5 39.Bc5 bc5+– 40.Qf6 Ke8 41.d6 Kd7+/– 42.Qe7 Kc6 43.Qc7 Kb5 44.Rc1 Qe4 45.Rc2 Ka6 46.Qc5 Rb8 47.Kc1 Qh1 48.Kd2+– Qg2 49.Kc3 Qe4? 50.d7 f4 51.Qc8!! Rb7 52.Qa8 Kb5 53.Qb7!! (53...Qb7 54.Rb2 Kc6 55.Rb7 Kb7 56.d8Q+–) 1–0. Welling,Gerard (2335) – De Rooij,Raymond, Den Bosch op, 1992.

5.Nf3 e5 6.d3 Nf6 7.Nbd2 Be7 8.Be2 0–0 9.0–0 c6 10.c4 cb5 11.cb5 Nbd7 12.a4 d5 13.Ne5 Ne5 14.Be5 Bd6 15.Bf6 Qf6 16.d4 Qg6 17.Nf3 Bc8 18.Bd3 Bf5 19.Nh4 Qh6 20.Bf5 Qh4 21.g3 Qf6 22.Qf3 Rad8 23.Rfc1 g6 24.Be4 Qf3 25.Bf3 Rc8 26.Bd5 Rfd8 27.Rc6 Rc6 28.Bc6 Rc8 29.e4 f6 30.f4 Kf7 31.Rc1 Ke7 32.e5 fe5 33.de5 Bc5 34.Kg2 Rd8 35.Rc2 Rd4 36.Ra2 Rd1 37.Kh3 h6 38.Kg4 Kf7 39.f5 Rd4 40.Kf3 gf5 41.h3 Ke6 42.Kg2 Ke5 43.g4 fg4 44.Re2 Kf4 45.hg4 Ra4 0–1. Trkn – Thomas Lazar, itsyourturn.com, 2000.

5.Nf3 e5 6.Be2 Nd7 7.d3 Ngf6= 8.0–0 Be7 9.Nbd2 0–0 10.c4 Re8 11.a3 Nc5 12.e4 (12.d4 ed4 13.ed4 Ne6+=) 12...Ne6 13.h3 Nd7 14.Nb3 f5 15.ef5 Nf4 16.Rc1 Rf8 17.g4 (17.d4!?=) 17...h5 (17...Bg5!? 18.Rc2 Nh3 19.Kh2 Nf4–+) 18.Nh2?? (better is 18.Kh2+=) 18…Nh3 0–1. Fournier,Frederic (1985) – kamikase (1985), Active (3/1), 2005.

5.Nf3 e5 6.Be2 Nf6 7.d3 Be7 8.Nbd2 0–0 9.0–0 Nbd7 10.c4 Nc5 (10...Re8 11.a3=) 11.e4 (11.d4 ed4 12.ed4 Ne6+=) 11...a4 12.a3 Nb3 (12...Qd7 13.Rb1=) 13.Rb1 (13.Nb3 ab3 14.Nd2 Ne8+/–) 13...Nd2 14.Qd2 (14.Nd2 Nd7+=) 14...c6 (14...Nh5 15.Ne5 de5 16.Bh5 Be4 17.Rfd1+=) 15.bc6+= Bc6 16.Bc3 Bb5?? (better is 16...Rb8+=) 17.cb5 1–0. Fournier,Frederic (1865) – ayacucho580, Active (5/0), 2005.

5.Nf3 Nf6 6.Bc4 (6.Bf6 ef6 7.d4 Qe7+=) 6...Nbd7 7.0–0 e6 8.Nc3 (8.d4 Be7+=) 8...Be7 (8...d5 9.Be2=) 9.d4 (9.Nd4 a4=) 9...0–0 (9...d5 10.Bd3=) 10.Bb3 (10.d5 ed5 11.Nd5 Ne5 12.Ne5 de5=) 10...c5 (10...d5!?=) 11.bc6+= Bc6 12.d5 ed5 13.Nd4 Bb7 14.Nf5 The pressure on the isolated pawn grows 14...Nc5 (14...Rc8!?=) 15.Nd5 Bd5 (15...Nd5 16.Bd5 Bf6 17.Rb1+/–) 16.Bd5 Rc8 (16...Rb8 17.c4+/– (worse is 17.Ne7 Qe7 18.Bf6 Qf6+=)) 17.Bf3 (17.Qf3 Nd5 18.Bg7 Nb4+/–) 17...Qd7 (17...Re8 18.Rb1 Ncd7 19.Ne7 Qe7 20.Bf6 Qf6 21.Bg4+/–) 18.Bg4+/– Ne6 19.Rb1 Ng4 (19...d5 20.e4! Ng4 21.Qg4+–) 20.Qg4 Rc5?? (better is 20...h5 21.Qh5 Rc4+–) 21.Nh6+– (21.Bg7?! Rf5 22.Bh6 Bg5 23.Bf8 Nf8+–; 21.Ng7?! Rg5 22.Nf5 Rc8+– (22...Rg4?? 23.Nh6)) 21...Kh8 22.Bg7! Ng7 23.Qd7 (23.Qd7 Re5 24.Rb6+–) 1–0. Wall,Bill – SamChess, chess.com, 2008.

4.Bb2 e6

5.a3 Nf6 6.Nf3 Be7 7.Be2 h6 8.0–0 g5 (8...0–0!?=) 9.Ne5 d6 10.Nd3 Bg2?? (better is 10...c6+=) 11.Kg2+– Ne4 (11...d5 12.Rg1+–) 12.Bh5 (better is 12.Bh8 Bf6 13.Bf6 Qf6 14.Ra2+–) 12...Bf6 (12...Nf6 13.c4+–) 13.c3 (better is 13.Qg4 Nc5 14.Nc5 Bb2 15.Ne6 Qd7 16.Nc7 Qc7 17.Qe4 Kd8+–) 13...Nd7? (13...d5 14.Qg4 Qd7 15.c4 Bb2 16.Nb2+–) 14.f3 (better is 14.Qg4 Nec5 15.Nc5 bc5 16.Qe6 Qe7 17.Bf7 Kf8 18.Qe7 Ke7 19.Bc4+–) 14...Nec5 15.Nf2 Qe7 16.d4 Nb7 17.Nd2 0–0–0 18.Ng4 Rdg8 19.Ne4 (better is 19.Qe2+–) 19...Bg7+/– 20.h3 (better is 20.Ngf2!?+/–) 20...f5+= 21.Nef6 Bf6 22.Nf6?? Nf6–+ 23.Qc2 Nh5 24.Kh2 g4 25.fg4 fg4 26.hg4 Rg4 27.Rg1 Qh4# 0–1. cogit – myszkamy, kurnik, 2011.

5.Nf3 c6 6.a4 cb5 7.ab5 Bd6 8.Be2 f6 9.Nh4 g5 10.Bh5 Kf8 11.Nf3 h6 12.d4 Ne7 13.Nc3 Bb4 14.e4 d6 15.d5 ed5 16.0–0 de4 17.Nd4 Qd7 18.Re1 d5 19.f3 f5 20.fe4 de4 21.Nde2 Qd1 22.Rad1 Kg8 23.Rd8 Kh7 24.Rh8 Kh8 25.Nd5 Kh7 26.Ne7 Be1 27.Bg6 1–0. j1a9n55 – black69, kurnik, 2012.

5.Nf3 d5 6.d4 Nf6 7.Bd3 Nbd7 8.Nbd2 (8.0–0 c5=) 8...c5 9.bc6 Bc6 10.0–0 Be7 11.c4 dc4 12.Nc4 0–0 13.Nce5 (13.Ba3 Ba3 14.Na3 Rc8=) 13...Ne5 14.Ne5 Be4 15.Qc2 (15.Be4 Ne4 16.Qd3 Qd5=) 15...Bd3 (15...Rc8 16.Qb3=) 16.Qd3 Qd5 17.Rfc1 Rfc8 18.a3 (18.Ba3 Bd8=) 18...Ne4 (18...b5!?=) 19.f3+= Nd6 20.Qd1 (20.e4 Qb7+=) 20...f6= 21.Nd3 Nc4 22.e4 Qd7 23.Qb3 Nb2 (23...a4!? 24.Qa2 b5+=) 24.Qb2= Rc1 25.Rc1 Qa4 (better is 25...Rd8 26.Rc4 b5=) 26.Rc3?? (better is 26.Qb6 Kh8 27.d5 ed5 28.ed5 Qa3 29.Qe6=) 26...Qd4–/+ 27.Kf1 Bc5 28.Nc5 bc5 29.Qc2 Rd8 30.Ke2? Qg1–+ 31.Rc5 Qg2 32.Ke3 Qg1 33.Ke2 Qh2 34.Ke3 Qh6 35.Kf2?? Rd2 (35...Rd2 36.Qd2 Qd2 37.Kf1 Qd3 38.Kg2 Qa3–+) 0–1. Fournier,Frederic (1820) – redoredo (1730), Active, 2011.

5.Nf3 f5 6.Bc4 d5 (6...Nf6 7.0–0+=) 7.Be2+= c5 8.0–0 Nf6 9.Ng5 Qe7 10.f4 Nbd7 11.Na3 g6 12.c4 (12.d4 Bg7=) 12...h6 (12...Bg7 13.d3=) 13.Nf3 Bg7 14.d3 (14.Ne5 Ne5 15.fe5 Ne4=) 14...0–0= 15.Ne5 Ne5 16.Be5 Nd7 (16...Rad8 17.Bf3=) 17.Bg7+= Kg7 18.Bf3 Nf6 19.Qa4 Rad8 20.Rad1 e5 21.fe5 Qe5 22.Rfe1 (22.Nc2 dc4 23.d4 Qe7 24.Qc4 Be4 25.Be4 Ne4=) 22...Rfe8 (22...Qb2 23.Nc2=) 23.Rd2 d4 24.Bb7+/– de3 25.Bf3?? f4?? 26.Rdd1+– g5 27.Nc2 g4 28.Be2?? h5? 29.Rf1 Kh6 30.Rde1 Rg8 31.Kh1 h4 32.Na3?? Qg5? 33.Rg1+/– Nh5 34.Qd1 Ng3 35.hg3 hg3 36.Bg4 Qg4 37.Qg4 Rg4 Do you see the mate threat? 38.Rgf1 Kg5 39.Kg1 Rh8 40.Rf3 Rgh4 41.Kf1 Rh1 42.Ke2 R1h2?? 43.Rg1+= Rh1 44.Rh1 Rh1 45.Nc2 Rc1 46.Ne3 fe3 47.Rg3 Kf4 48.Rf3 Kg4? 49.Rf6 Rc2 50.Ke3 Ra2 51.Rb6 a4 52.d4 cd4 53.Kd4 a3 54.Ra6 Ra1 55.b6 a2 56.Kc5 Rg1 57.b7 (57.b7 Rb1 58.Kc6+–) 1–0. kamret (2175) – peti0815 (2060), GameColony.com, 2003.

5.Nf3 f5 6.Be2 Nf6 7.0–0 Be7 8.d3 0–0 9.Nbd2 d5 10.c4 c5 11.Qc2 Nbd7 (11...a4 12.Rad1=) 12.a3 (better is 12.Ng5!? Re8 13.Ne6+/–) 12...h6 13.Rac1 Qc7 14.Rfe1 e5 15.cd5 Bd5 16.Nc4 e4 17.de4 Be4 18.Qb3 a4 19.Qa2 Kh7 20.Qa1 Ng4 21.g3 Bf6 22.Bf6 Ndf6? (better is 22...Ngf6 23.Red1 Rad8=) 23.h3 Qb7 24.Nd6 Qd5? 25.Ne4?? fe4+= 26.Nh4 Nf2?? 27.Kf2+= Ng4 28.Kg1 Ne3 29.Qc3 Qg5 30.Ng2 (30.Ng2 Nf5 31.Bg4+/–) 1–0. ejdrzej (1720) – odcd, kurnik, 2012.

5.f4 f5 6.Nf3 Nf6 7.a4 Be7 8.d4 0–0 9.Bd3 d5 10.Nbd2 Ne4 11.0–0 Nd7 12.c4 Ndf6 13.Rc1 dc4 14.Nc4 Nd5 15.Qe2 Nb4 16.Bb1 Bd5 17.Nce5 Bd6 18.Nd2 Be5 (18...Nd2 19.Qd2 Bb3 20.Bd3 Ba4 21.Bc4=) 19.de5 (better is 19.fe5!? Nd2 20.Qd2+=) 19...Nd2+= 20.Qd2 Qe7 (20...Bb3 21.Qc3 Ba4 22.e4+=) 21.Bc3 Rad8 22.Bb4 ab4 23.Qb2 b3 24.Rfe1 Qb4 25.Rc3 Qa4 26.e4? fe4 27.Kf2? Qd4 28.Kg3 e3 29.Rce3 Qf4 30.Kh3 Qh6 31.Kg3 Qg5 32.Kh3 Bg2! 33.Qg2 Qh6 34.Kg3 Qf4 35.Kh3= Qh6 36.Kg3 Qf4 37.Kh3= Qh6 ½–½. amator111 (1740) – odcd, kurnik, 2011.

5.f4 Nf6 6.Nf3 d5 7.Be2 Be7 8.0–0 0–0 9.Ne5 c5 10.Bf3 Nbd7 11.c4 Ne5 12.fe5 Ne8 13.cd5 Bd5 14.Nc3 Bf3 15.Qf3 Nc7 16.Rad1 Qd7 17.a4 Rad8 18.d4 c4 19.e4 Bb4 20.Qg3 Qe7 21.Bc1 Bc3 22.Qc3 Qb4 23.Qg3?? g6?? 24.Bh6+– Rfe8? 25.Qf4 Qe7 26.Rf2 Rd7 27.Rdf1?? Rd4?? 28.Qf7+– Qf7 29.Rf7 Na8 30.Rg7 Kh8 31.Rff7 Rd1 32.Kf2 Rd2 33.Ke3 Rd3 34.Ke2 Red8 35.Rh7 Kg8 36.Rfg7 Kf8 37.Rh8# 1–0. elsh1403 – anno65, kurnik, 2012.

5.Nf3 Nf6

6.Nc3 Be7 =.

6.Be2 c5 7.bc6 Nc6 8.0–0 d5 9.c4 Bd6 10.cd5 ed5 11.Nc3 Ne5 12.Bb5 Bc6 13.Ne5 Bb5 14.Nb5 Be5 1–0. fjanusz52 – jarvoz, kurnik, 2012.

6.Be2 c6 7.c4 d5 8.0–0 dc4 9.Bc4 c5 10.Nc3 Nbd7 11.d4 Ng4 12.d5 e5 13.h3 h5? 14.Qc2 Ngf6+/– 15.Ng5 Bd6 16.Ne6 Qe7? 17.Ng7+– Kd8 18.Nf5 Qf8 19.Nd6 Qd6 20.e4 Kc7 21.Ne2 Rag8 22.Ng3 Kb8 23.Rad1 h4 24.Nf5 Qf8 25.f3 Nh5 26.f4 f6 27.fe5 fe5 28.Rd2 Nhf6 29.Rdf2 Qe8 30.a4 Rg6 31.Nd6 Qe7 32.Nf5?? Qf8?? 33.Bd3 Rhg8 34.Ne3 Qh6 35.Rd1?? Qe3–+ 36.Bf1?? Qh3 37.Rd3 Qg4 (38.Be2 Qe4–+) 0–1. Blaszczak,Jan – Jablonski,Jerzy, VI Pilsudski Memorial, Poland, 1992.

6.Be2 Be7 7.0–0 d6 8.c4 Nbd7 9.Qc2 g5 (9...0–0 10.Nc3=) 10.Nd4 (10.Ng5 Rg8 11.Bf3 Qc8+/–) 10...h5 11.Bf3 Bf3 12.Nf3 (worse is 12.gf3 Ne5=) 12...Rh6 (12...g4!? 13.Nd4 Ne5+=) 13.Ng5+– Ng4 14.Nf3 Bf6 15.d4 Qe7 (better is 15...Rg6+–) 16.h3 e5 (16...0–0–0 17.Qe4+– (17.hg4?! hg4 18.Nbd2 Rdh8=)) 17.Qe4 0–0–0 18.Rd1 Rg8 (18...ed4 19.Qe7 Be7 20.hg4 de3 21.gh5 ef2 22.Kf2 Bf6+–) 19.de5 (better is 19.Qa8 Nb8 20.Nc3+– (20.hg4?! hg4 21.Ne1 ed4 22.Bd4 Rgh8+–)) 19...Nge5+/– 20.Ne5 Be5 21.Be5 de5 22.Nc3 Rhg6 23.g3 Qe6 (23...h4 24.Nd5 Qg5 25.g4+/–) 24.Kh2 (24.Qa8 Nb8 25.h4+/–) 24...Kb8 25.Qh4 Qf5 26.Rd2 Nc5 27.Rg1 Ne6 (27...Qf3!?+=) 28.Qe4 Qf6 29.Nd5 Qd8?? (better is 29...Qg7 30.Kh1 Nc5+/–) 30.Nb6!+– cb6 31.Rd8 Rd8 32.Qe5 Kb7 33.h4 Rd2 34.Rg2 Rd8 35.Qh5 1–0. Fischbach,Rainer (1885) – Bannon,Senan, Leipzig VfB op, 2008.

6.Be2 Be7 7.c4 0–0 8.0–0 d5 (8...Ne4 9.Nc3=) 9.Nc3 Nbd7 10.d4 (10.cd5 Nd5 11.Nd5 Bd5+=) 10...c5 (10...dc4 11.Bc4 c6 12.Qe2=) 11.bc6 (11.Rc1 Rc8=) 11...Bc6 12.cd5 (12.Rc1 dc4 13.Bc4 Rc8=) 12...Nd5 13.Rc1 Nc3 14.Rc3 Bb7 (14...Bd5 15.Qb1=) 15.Qa4+= Bb4 16.Rcc1 Nf6 (16...Bd5 17.Ba3=) 17.Ne5 (17.Ba3 Ba3 18.Qa3 Rc8+=) 17...Rc8 (17...Bd5 18.Ba3+=) 18.Rc8+= Qc8 19.Bb5 (19.Rc1 Qd8+=) 19...Qa8 20.Bc6 (20.a3 Bd6 21.Nc4 Bc7+=) 20...Rc8= 21.Rc1 Bd6 22.Bb7 Rc1 23.Bc1 Qb7 24.Nc4 b5?? 25.Nd6+/– Qc6 26.Qb5 Qc1 27.Qf1 Qa3 28.Qa6 Qc1= 29.Qf1 Qa3 30.Nc4 Qa2 31.Qc1 g6 32.f3 Nd5 33.e4 Nb4 34.Ne5 Qc2 35.Qe1 Qb2 36.Qd1 Nc2 37.Nc4 Qa2 38.Qe2?? Qa1–/+ 39.Kf2 Nd4 40.Qb2 Qb2 41.Nb2 e5 42.Ke3 f6 43.Kd3 Kf7 44.Kc4 Ke6 45.Na4 f5 46.Nc5 Kf6 47.Nd7= Ke6 48.Nc5 Kf6 49.Nd7= Ke6 50.Nc5 ½–½. Pletanek,Jan (2275) – Lacha,Jan, IWEX95, 1995.

6.Be2 g6 7.c4 Bg7 8.0–0 0–0 9.d4 d5 10.Nc3 Nbd7 11.a4 Rc8 12.Ba3 c5? (better is 12...Re8!?+=) 13.bc6!+– Bc6 (13...Bc6 14.Bf8 Combination; 13...Rc6 14.Ne5 Decoy) 14.Bf8 Qf8 15.cd5 Nd5 16.Nb5 Nb4 17.Qb3 Nf6 18.Rac1 Bd5 19.Qa3 Ne4 20.Rc8 Qc8 21.Rc1 Qb7 22.Bc4 Nf6 23.Bd5 Nfd5 24.Qb2 (24.Qb2 Nd3 25.Qc2 Nc1 26.Qc1+=) 1–0. donaldzikzpo (1650) – fakazer, kurnik, 2012.

4.Nf3 d6

5.a4 Nd7 6.Be2 g6 7.0–0 Bg7 8.d4 d5 9.Bb2 e6 10.c4 Ne7 11.cd5 Nd5 12.Bc4 0–0 13.Nbd2 c6 14.Rc1 cb5 15.Bb5 Nb4 16.Nb3 Nf6 17.Ne5 Nfd5 18.Nc4 (18.Qf3 f6 19.Nc4 Nd3 20.Nca5 Nb2 21.Nb7 Qe7+/–) 18...Ba6 19.Bc3?? (better is 19.Ba6 Ra6 20.e4+=) 19...Bb5 20.ab5 (better is 20.Bb4 Bc4 21.Bf8 Bb3 22.Qb3 Qf8 23.Rc4–/+) 20...a4?? (20...Na2 21.Bb2 Nc1 22.Nc1–+) 21.Na1?? Nc3?? 22.Rc3= Nd5 23.Rc1 a3 24.Qb3+/– a2 25.Rfd1 h5 26.f3 Bh6 27.Rc2 Qg5 28.f4 Qd8 29.Ne5?? Bg7 30.Nc6 Qd6 31.g3?? Ra3–+ 32.Qb2 Ne3 33.Rdd2 Nc2 34.Qc2 Raa8 0–1. lican – jana101, kurnik, 2012.

5.Bb2 Nf6 +=.

5.d4+= Nd7 6.Bb2 a4 7.c4 +=.

5.d4+= Nd7 6.Bb2 g6 7.c4 (7.Be2 Ngf6+=) 7...Bg7= 8.Qc2 (8.Be2 e5+=) 8...e5 (8...Bf3 9.gf3 e5 10.de5 de5 11.f4+=) 9.Be2+= Qe7 (9...Nh6 10.0–0+=) 10.de5 (10.0–0 Ngf6+=) 10...Ne5= 11.Nbd2 0–0–0 12.Ne5 Be5 13.Bf3 Nf6 14.Bb7 (14.0–0 Bb2 15.Qb2 Rhe8+=) 14...Kb7 15.Nf3 (15.0–0 Bb2 16.Qb2 h6+=) 15...Bb2 16.Qb2 Ne4 (16...h5 17.0–0+=) 17.Qd4 (17.0–0 Qf6 18.Qc2 Rhe8+=) 17...Qe6 (17...d5 18.0–0 Qc5 19.Ne5 Qd4 20.ed4=) 18.Rc1 (18.Rd1 Rhe8+=) 18...f5 (18...d5 19.cd5 Qd5 20.0–0=) 19.0–0 Rhe8 (19...Rde8 20.Qd5 Qd5 21.cd5=) 20.Qd5 (20.Rfd1 Nf6+=) 20...Qd5 21.cd5 Nc5 22.Rc4 Re4 23.Rfc1 h6 24.Nd2 Re5 25.Rd4 Rde8 26.Nb3 Re4 27.Rcc4 White fights for the Initiative 27...g5 28.h4 g4 29.Re4= Ne4 30.Nd4 Re5 31.Ne6 Exerts pressure on the backward pawn 31...Nc5 32.Nd8+= Kc8 33.Nc6+/– Kd7 34.Ne5+– de5 35.f3 gf3 36.gf3 Kd6 37.e4 fe4 38.fe4 h5 39.Kg2 Kd7 40.Kf3 Kd6 41.Ke3 Kd7 42.Rc5 bc5 43.Kd3 c6 44.bc6 Kc7 45.Kc4 Kb6 46.a4 (46.a4 Kc7 47.Kc5 Kd8 48.d6 Ke8 49.Kd5 Kf7 50.c7 Kf8 51.c8Q Kg7 52.d7 Kh7 53.d8Q Kg6 54.Qe6 Kg7 55.Qdg8#) 1–0. Cattaneo,Romain (1800) – Bessat,Remy (2005), Marseille FRA, 6th Open, 2005.

5.d4 Nd7 6.Bb2 g6 7.c4 Bg7 8.Qc2 e5 9.Be2 Ngf6 10.0–0 Ne4 11.Bd3 f5 12.c5 bc5 (12...dc5 13.Ne5 cd4 14.ed4 Ne5 15.de5=) 13.de5 Qe7 (13...de5 14.Nbd2 Nd6 15.Rad1=) 14.ed6 cd6 15.Bg7 Qg7 16.Nbd2 d5 17.Rac1 0–0 18.Be2 a4 19.Rfd1 Qe7 20.h4 h6 21.Rf1 Rf7 22.Nb1 (22.Rfe1 Qf6=) 22...g5+= 23.h5? (better is 23.hg5 hg5 24.Nfd2+=) 23...g4–+ 24.Nfd2 Qh4 Black prepares g3 25.Nc3? (better is 25.Bd3 Ne5 26.f4 Nd2 27.Nd2–+) 25...Nf2! 26.Rf2 (26.Rf2 g3 Decoy) 26...g3 27.Nf3 (27.Rf5?? Qh2 28.Kf1 Qh1) 27...gf2 28.Kf1 Qh5 29.Kf2 Rg7 30.Rg1 (30.Qd3 Nf6 31.Rg1 Ng4 32.Kf1 Re8–+) 30...Re8 31.Na4 (31.Nd1 Nf6 32.Qa4 d4–+) 31...Nf6 32.Qb2 (32.Ke1 Re3 33.Qc5–+) 32...d4! 33.Nc5 (33.ed4 Ne4 Combination) 33...Bf3 34.Bf3 Ng4 35.Ke2 (35.Bg4 de3 (35...Qg4?! 36.Qd4 Qg3 37.Ke2–+) 36.Ke1 Qh2 37.Qb3 Kh8–+) 35...Re3 (35...de3?! 36.Qd4 Kh7 37.Rf1–+) 36.Kd2 (36.Kd1 Rf3! 37.Qd4 Ne3 38.Kc1 Qh2–+) 36...Rf3! 37.Qd4 (37.gf3 Qh2 Double attack (37...Qh2 Decoy)) 37...Rf2 38.Kc3 (38.Kc1 Qf7 39.Nb3 Qc7 40.Qc5 Qc5 41.Nc5 Rc7–+) 38...Qe8 39.Rc1 (39.b6 Ne3 40.Rc1 Rf4 41.Qf4 Nd5 42.Kc2 Nf4–+) 39...Ne3 40.b6 (40.Qd6 Rg6 41.Qd4–+) 40...Rf4! 41.Qd6 (41.Qf4 Nd5 Double attack (41...Nd5 Decoy)) 41...Rg6 (41...Rg6 42.Qf4 Nd5 43.Kd4 Nf4–+) 0–1. housemd (1960) – yzerman123 (2200), gameknot.com, 2015.

5.d4+= Nd7 6.Be2 e5 +=.

5.d4+= Nf6 6.Nbd2 +=.

3.e3 c5

4.Bb2 e5 5.Be5 f6 (5...d5 6.Nf3+/–) 6.Bg3 Nc6?? (better is 6...d5+/–) 7.bc6+– dc6 8.Nf3 Qd3 (8...Be6+–) 9.Bd3 Bh3 10.0–0 (better is 10.gh3 Ne7+–) 10...Bd6 11.Bd6 Ne7 12.Be7 Ke7 13.gh3 Rad8 14.Nc3 Rd3 15.cd3 g5 16.Kh1 (16.Qa4 Rc8+–) 16...h5 17.Rg1 b5 18.Rb1 f5 19.Rg5 Rh6 20.Rf5 Rf6 21.Rf6 Kf6 22.Qg1 c4 23.dc4 bc4 24.Ne4 Kf5 25.Nd6 Ke6 26.Qg6 Kd5 27.e4 Kc5 28.Nb7 1–0. casouza (2220) – idontknow, net–chess.com, 2006.

4.bc6 dc6 5.Bb2 Nd7 6.Nf3 Ngf6 7.c4 c5 8.Be2 Bb7 9.0–0 h6 10.d4 g5 11.d5 Bg7 12.Qc2 0–0 13.Nc3 e5 14.Nb5 e4 15.Ne5 Ne5 16.Be5 Nd7 17.Bg7 Kg7 18.Bg4 (better is 18.Qe4!? f5 19.Qb1+–) 18...Nf6 19.Bf5 Qe7 20.Rad1 Qe5 21.g4 h5 22.h3 hg4 23.hg4 Rh8 24.f4 ef3 25.Kf2?? (better is 25.Rf3 Rh4 26.Rd2+=) 25…Rh2 (25...Rh2 26.Kf3 Rh3 27.Kf2 Qe3 28.Kg2 Qg3#) 0–1. ourang – melerak, kurnik, 2012.

3.e3 c5 4.Nf3 d5 5.Bb2 f5 (5...Nf6 6.c4=) 6.Be2 Nf6 7.0–0 Bb7 8.d4 c4 9.a4 e6 10.Ba3 Be7 11.Ne5 (11.Ng5 Qd7+=) 11...0–0= 12.Nd2 Ba3 13.Ra3 Nbd7 14.Ndf3 Ne4 15.Nd7 Qd7 16.Ne5 Qe7 (16...Qd6 17.Qa1+=) 17.Qc1 (17.Qa1 Rad8=) 17...Rac8 18.f3 Nd6 19.c3 Nf7 20.Nf7 Rf7 21.f4 g5 22.g3 Kh8 (22...g4 23.Ra1=) 23.Ra1 (23.fg5 Qg5 24.Ra2 e5+=) 23...gf4 (23...g4!?=) 24.ef4+= Rg7 25.Kh1 Rcg8 26.Rg1 e5? (better is 26...Rg6+=) 27.fe5+– (27.de5 d4 28.Rg2 Bg2 29.Kg2 Qh4–+) 27...f4 28.Qf4 Rf8 29.Qe3 Bc8 30.Raf1 Rfg8 31.Bf3 Bh3 32.Bg2 Be6 33.Rf2 Qa3 34.Rgf1 Qa4 35.Rf8 Qb5+/– 36.Rg8 Kg8+= 37.Qf4 Qe8 38.Qf6 b5= 39.Ra1 b4 40.cb4 ab4 41.Ra6+= b3?? 42.Re6 Qa8 43.Bd5 Kh8?? 44.Ba8 (44.Ba8 h6 45.Be4 c3 46.Re8) 1–0. Fournier,Frederic (1795) – alfilstar(C) (1880), Active, 2008.

3.e3 c6

4.Ba3 Nf6+= 5.Nf3 Bb7 6.d4 (6.Nc3 g6+=) 6...g6 7.Be2 e6 8.bc6 Nc6 9.Bf8 Kf8 10.c4 Kg7 11.0–0 Qc7 (11...Ne4 12.Nfd2 Nd6 13.Nc3+=) 12.Nc3+= Ne7 13.Nb5 Qb8 14.Qb3 (14.Bd3 Nf5+=) 14...Nf5= 15.Rfc1 h5 (15...Qf8 16.Nc3 Rb8 17.Qc2 Bf3 18.Bf3+=) 16.Qb2 Rc8 17.d5 ed5 18.cd5 Bd5 19.Rc8 Qc8 20.Ng5 (20.Rc1 Qd8 21.Nc7 Bf3 22.Bf3 Rc8 23.Qb6 d5=) 20...Ne3 (20...Qb8 21.Rc1 a4 22.a3+=) 21.fe3 (21.Rc1 Qe8 22.Nc7 Qe7+=) 21...Qc5 22.Qd4 (22.Qc3 Rc8 23.Qd4 Qd4 24.Nd4 Rc3+=) 22...Re8+= 23.Qc5 bc5 24.Kf2 Re5 25.h4 Rf5 (25...Ng4 26.Bg4 hg4 27.e4 Be4 28.Re1+=) 26.Nf3+/– Ng4 27.Kg3 Bf3 (27...Ne3? 28.Nd6 Kf6 29.Nf5 Nf5 30.Kf2+–) 28.Bf3 (worse is 28.gf3 Ne3 29.Nd6 Rd5+=) 28...Ne3 29.Re1 Re5 30.Kf2 Nc4 (30...Ng4 31.Bg4 Re1 32.Ke1 hg4 33.Nd6+/–) 31.Rd1 Nb6 32.Nd6 Re6 33.Nb7 c4 (33...Re5 34.Rd6 Re6 35.Re6 de6 36.Nc5+–) 34.Nc5+– Re7 (34...Re8 35.Nd7 Nc8 36.Be2+–) 35.Rd6 (35.Rd6 Nc8 36.Rd7 Rd7 37.Nd7+–) 1–0. yzerman123 (2185) – marekt (2135), gameknot.com, 2015.

4.a4 c5 5.Be2 Nf6 6.f4 Bb7 7.Nf3 h6 8.0–0 Qc7 9.Bb2 Ne4 10.d3 Nd6 (better is 10...Nf6!?+/–) 11.e4+– h5 12.Ng5 h4 (12...f6 13.Bh5 Kd8 14.Nf7 Nf7 15.Bf7+–) 13.Bh5 e6 (13...h3 14.gh3 Qc8+–) 14.e5 Nf5 15.Nf7 Bg2 (15...Rg8 16.Nh6 g6 17.Ng8 gh5 18.Qh5 Kd8 19.Qf7+–) 16.Nh8 Kd8 17.Nf7 Kc8 18.Rf2 h3 19.Bf3 (19.Na3 Kb7+–) 19...Ra7 (19...d5 20.Ng5 Qd7 21.c4+–) 20.Bg2 Ne3 (20...hg2 21.Qh5 d5+–) 21.Qf3 d6 22.Nd6 Bd6 23.ed6 Qd6 24.Bh3 Nd5 25.Be5 Qe7 26.Qd5 (26.Qd5 Rd7 27.Be6+–) 1–0. Hullplayer50 – 2pieR, ChessWorld.net, 2016.

4.Nc3 Nf6 +/–.

3.e3 e5

4.Bb2 d6 5.c4 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 b6).

4.Bb2 d6 5.Bc4 Nf6 6.Nc3 Be7 (6...d5 7.Bb3=) 7.Qf3 Ra7 8.Qg3 0–0 9.f4 ef4 10.Qf4 Be6 11.Bd3 Nbd7 12.Nf3 Nc5 Black prepares a4 13.Be2?? (13.Nd4 Nd3 14.cd3 Rb7+=) 13...a4 (better is 13...Nh5 14.Qd4 Bf6–+) 14.a3= Re8 15.Ng5 Bd7 16.0–0 h6 17.Nge4 Nce4 (17...Ne6!? 18.Qf3 Ra5+=) 18.Ne4+/– Ne4?? (better is 18...d5 19.Nf6 Bf6 20.Bf6 Qf6 21.Qf6 gf6 22.Rf6 Ra5+/–) 19.Qf7 (19.Qf7 Kh7 20.Qg7; 19.Qe4?! Bh4 20.Qf3 Be6+=) 1–0. mikebaldini (1675) – silhouet2003 (1670), gameknot.com, 2014.

4.Bb2 d6 5.Nf3 c5 (5...Nf6 6.Be2=) 6.bc6+= Nc6 7.Bb5 Bd7 8.0–0 Nf6 9.d4 e4 10.Nfd2 Be7 (10...d5!?=) 11.c4+= Nb4 12.Bd7 Qd7 13.f3 (13.Nc3 Rc8+=) 13...ef3= 14.Qf3 Nd3?? (better is 14...Rc8 15.a3 Nc2+=) 15.Qa8+– Bd8 16.Rf6! gf6 (16...0–0 17.Rf3 Nb2 18.Nc3+–) 17.Qe4 Ne5 18.de5 de5 19.Be5! fe5 (19...f5 20.Qd4 (20.Bh8?! fe4 21.Bd4 f5+–) 20...Rg8 21.Nc3+–) 20.Qe5 Be7 21.Qh8 Bf8 22.Nc3 Qd2 23.Qe5 Be7 24.Nd5 Qd5 25.cd5 Kd7 26.Rf1 Ke8 27.d6 Kf8 28.Qe7 .Kg7 29.Qf6 Kg8 30.Qf7 (30.Qf7 Kh8 31.Qf8#) 1–0. Rosner,Dirk (2175) – Tortoza,Carlos, CiF, 2006.

3.e3 Nf6

4.Be2 g6 5.Bb2 Bg7 6.Bf3 c6 7.c4 0–0 8.Ne2 d5 9.Na3 (9.bc6 Nc6 10.Bf6 Bf6=) 9...Qd6 10.Qb3 e5 11.bc6 e4 (worse is 11...Nc6 12.cd5 (12.Qb6? Rb8 13.Nb5 Rb6 14.Nd6 Rb2 15.Bd5 Nb4–+) 12...a4 13.Qb6+=) 12.Nb5 Qc6 13.Ned4 dc4 14.Nc6 (14.Qc2!? Qd7 15.Be2+=) 14...cb3–/+ 15.Ne7 Kh8 16.Be2 Be6 17.ab3 Bb3 18.0–0 Nbd7 19.Nc6 Nc5 20.Nbd4 Rfc8 21.Nb3? (better is 21.f3–/+) 21...Nb3–+ (21...Rc6?! 22.Nd4 Rc7 23.f3–/+) 22.Ra3 Nd2 23.Rd1 Rc6 24.Rd2 Ne8 25.Bg7 Kg7 26.Bb5 (26.Ra1 h6–+) 26...Rc1 27.Bf1 b5 28.g3 b4 (28...b4 29.Ra4 Nc7–+) 0–1. Szkodnikow_i_ofiar – PeterRs, ChessWorld.net, 2015.

4.Qf3 c6 5.bc6 Nc6 6.d4 (6.Bb2 Bb7=) 6...Rb8 7.Ba3 (7.c4 e5=) 7...e6 (7...b5 8.Bc5=+) 8.c4 (8.Bf8!? Kf8 9.c3=) 8...Ba3 9.Na3 0–0 10.Bd3 d5 11.cd5 Nd5 (11...Nb4 12.Bb5=+) 12.Ne2 Ncb4 13.Be4 (13.Bb5 Bb7 14.Qg3 Qc7=+) 13...Bb7 14.Qh3 h6 15.Ng3? (better is 15.0–0!?=+) 15...Nc3 (better is 15...Ba6 16.Ne2 Be2 17.Bd5 Bd3–+ (17...ed5?! 18.Ke2 Rc8 19.Rhb1–/+; < 17...Nd5 18.Ke2 Nc3 19.Kd3–+)) 16.0–0?? (better is 16.Bb7 Rb7 17.0–0–/+) 16...Be4 17.Ne4 Ne4 18.Qg4 (18.Nb5 Rc8–+) 18...Nf6 (18...Nc3 19.Nb1 Nca2 20.Qe2–+) 19.Qh4 (19.Qe2 Qd5–+) 19...Nbd5 (19...Qd5 20.Rfe1–+) 20.g3 (20.Nb5 a4–+) 20...Rc8 21.Nb5 Rc2 22.a4 Nh7 (22...Qd7 23.Na3 Rb2 24.Nc4–+) 23.g4 (23.Qd8 Rd8 24.Rac1–+) 23...Qh4 (24.Ra3 Qg4 25.Kh1 Qf3 26.Kg1 Ng5 27.h3 Nh3 28.Kh2 Nf6 29.Rg1 Qf2 30.Kh3 Qh2#) 0–1. slavisa3 – ontherooks, Live Game Caissa's Web, 2004.

4.Nf3 d6 =.

3.e4 Bb7

4.Nc3 e5 5.Bb2 Bc5 6.Nf3 Nf6 7.Ne5 Qe7 (7...Be4? 8.Ne4 Ne4 9.Qf3+–) 8.Nd3 1–0. Santamaria Navarro,Floreal (2025) – Brun,Jorge Humberto (1995), Argentina – Spain, 2005.

4.Nc3 e5 5.Nf3 Nf6 6.Bc4 Bb4 +=.

4.Nc3 e5 5.Nf3 Nf6 6.Ne5 Bb4 7.Bd3 (7.Bc4 Qe7 8.f4 0–0+=) 7...Qe7 8.Ng4 Ne4 9.0–0 d5 10.Ne3 (10.Bb2 0–0+=) 10...Bc3 (10...Nc3 11.dc3 Bc3 12.Nf5+/–) 11.dc3+= Nd7 12.Bb2 (12.f3 Nc3 13.Qe1 Qc5+=) 12...0–0–0 13.Qg4 Kb8 14.c4 dc4 (14...Ndf6 15.Bf6 (worse is 15.Qg7 Rhg8 16.Qh6 dc4 17.Be4 Ne4–/+) 15...Qf6 16.Nd5 Bd5 17.cd5=) 15.Be4 Be4 16.Rfe1 (16.Bg7? f5 17.Nf5 Bf5 18.Qf5 Qg7–+; worse is 16.Qg7 Rhg8 17.Qc3 Qg5=) 16...Rhe8 17.Qg7 (17.Bg7? f5 18.Qg3 f4 19.Qf4 Qg7–+; 17.Nc4?! f5 18.Qg7 Qb4=) 17...Rg8 18.Qd4 Qe6 19.g3 Nc5 20.Qf6 Qh3 (20...Qf6 21.Bf6 Rde8 22.f4+=) 21.Be5 (21.Rad1!? Rd1 22.Rd1=) 21...Ne6= 22.Rad1 (22.Red1!? Rc8 23.f3–/+ (23.Qf7?? Ng5 24.Bc7 Kb7–+)) 22...Rc8+= 23.Rd4 (23.f3 Rg6 A) 24.Qf7?? Ng5 25.Bc7 Kb7–+ (worse is 25...Rc7 26.Qf8 Kb7 27.fe4–+); B) 24.Qe7 Bf3 25.Rd2+=) 23...Rg6–/+ (23...Nd4 24.Qb6 Bb7 25.Qd4+=) 24.Re4 (24.Qf7?? Ng5 25.Bc7 Ka8 (25...Rc7?! 26.Qf8 Kb7 27.Re4 Ne4 28.Qf3=) 26.Re4 Nf7–+) 24...Rf6 25.Bf6 Qh5 26.Nc4 (26.Rc4 Qb5 27.Rh4 h5–/+) 26...Qf5–/+ 27.Ne5 (27.Be7 Qb5 28.Ne5 Qb2–/+) 27...Nc5 28.Rf4 (28.Rc4 Kb7 29.Be7 Re8–+) 28...Qc2 29.Be7 (29.a3 Kb7 30.Be7 f5 31.Bc5 Qc5–+ (31...bc5?! 32.Nc4+=)) 29...Qd2 30.Ra1 (30.Rf1 Qa2 31.Bc5 bc5 32.Rf7 Kb7–+) 30...Qb2 31.Re1 Re8 32.a4 (32.Rf7!? Qa2 33.Rh7–+) 32...Kb7–+ (32...Kb7 33.Rf7 Na4–+) 0–1. guerrer (2060) – yzerman123 (2245), gameknot.com, 2015.

4.Nc3 e5 5.Nf3 Nf6 6.Ne5 Bb4 7.Bd3 Qe7 (7...0–0 8.0–0 Re8 9.Ng4 Bc3 10.dc3 Ne4 11.Qf3+=) 8.Ng4 Ne4 9.0–0 d5 10.Ne3 Bc3 11.dc3 Nd7 12.Bb2 (12.f3 Nc3 13.Qe1 Qc5+=) 12...0–0–0 13.Qg4 (13.Re1 Ne5+=) 13...Kb8 14.c4 (14.Qg7 Rhg8 15.Qh6 Ndc5=) 14...dc4 (14...Ndf6 15.Qf4 g5 16.Qe5 Qe5 17.Be5+=) 15.Be4 (worse is 15.Bc4 Ne5 16.Be5 Qe5+=) 15...Be4 16.Rfe1 (16.Bg7? f5 17.Qf4 Qg7–+; 16.Qg7?! Rhg8 17.Qc3 Qg5+=) 16...Rhe8 17.Qg7 (17.Bg7? f5 18.Qg3 f4 19.Qf4 Qg7–+; 17.Nc4 h5 18.Qe2 Qb4 19.Bg7 Bg2 20.Qe8 Re8 21.Re8 Kb7–+) 17...Rg8 18.Qd4 Qe6 19.g3 Nc5 20.Qf6 Qh3 (20...Qf6 21.Bf6 Rde8+=) 21.Be5 (better is 21.Rad1!? Rd1 22.Rd1+=) 21...Ne6+= 22.Rad1 (22.Rf1 Kb7 23.f3 Rd2–+) 22...Rc8 23.Rd4 (23.f3 Rg6 A) 24.Qf7?? Ng5 25.Bc7 Kb7–+ (worse is 25...Rc7 26.Qf8 Kb7 27.fe4–+); B) 24.Qe7 Bf3 25.Rd2–/+) 23...Rg6–/+ (23...Nd4 24.Qb6 Bb7 25.Qd4+=) 24.Re4 (24.Qf7?? Qh2 25.Kf1 Ng5 26.Bc7 Kb7 27.Re4 Qh3 28.Ke2 Nf7–+) 24...Rf6 25.Bf6 Qh5 26.Nc4 Qf5 27.Ne5 (27.Be7 Qb5 28.Ne5 Qb2–/+) 27...Nc5 28.Rf4 (28.Rc4 Kb7 (28...Qf6?! 29.Rc5 Qd6 30.Rc4+=) 29.Be7 Re8–+) 28...Qc2 29.Be7 Qd2 (29...Kb7 30.Rf7 Qa2 31.Bc5 bc5–+) 30.Ra1? (better is 30.Rf1!?–/+) 30...Qb2–+ 31.Re1 Re8 32.a4 (better is 32.Rf7!? Qa2 33.Rh7–+) 32...Kb7–+ (32...Kb7 33.Bc5 bc5–+ (33...Re5?! 34.Re5 Qa1 35.Kg2 Qe5 36.Be3–/+)) 0–1. calabuig (2060) – yzerman123 (2245), gameknot.com, 2015.

4.Nc3 e5 5.Qh5 Bd6 6.Bc4 Qe7 +=.

4.Nc3 g6 5.d4 Bg7 (5...Nf6 6.e5 Nd5 7.Nd5 Bd5 8.Ne2+=) 6.Nf3 Nf6 7.e5 Nd5 8.Nd5 (8.Na4 e6+=) 8...Bd5+= 9.c4 Bb7 10.Bd3 (10.Be2 d6 11.Bf4 0–0=) 10...0–0 11.0–0 d6 12.Qe2 c5 (12...Nd7!?=) 13.Be4 (13.Bg5 f6 14.ef6 ef6 15.Qe6 Rf7+=) 13...Qc7 (13...Be4 14.Qe4 Nd7 15.Bg5+=) 14.dc5 (14.Bb7 Qb7 15.dc5 dc5+/–) 14...dc5 (14...Be4 15.Qe4 Nd7 16.cd6 ed6 17.ed6 Qd6 18.Bf4+/–) 15.Rb1 (15.Bf4 Ra7+/–) 15...e6 16.Bf4 Nd7 (16...Rd8 17.h3+/–) 17.Rbd1+– Ra7 18.Bb7 Rb7 19.Rfe1 (19.Rd6 h6+–) 19...Re8 20.Rd6 Nb8 (20...Bf8!? 21.Rd3 Be7+–) 21.Red1 Bf8 22.R6d3 h6 23.Qe3 Kh7 (23...g5 24.Bg5 hg5 25.Qg5 (25.Ng5 Bg7 26.Qe4 Qe5 27.Qb7 Qg5+–) 25...Bg7 26.Rd8 Rd8 27.Rd8 (worse is 27.Qd8 Qd8 28.Rd8 Kh7–/+) 27...Qd8 28.Qd8 Bf8 29.Qc8+–) 24.a4 (better is 24.Nd2 Qc8 25.Ne4 Bg7+–) 24...Qe7? (24...Bg7+–) 25.Ng5 Kg7 (25...hg5 26.Bg5 Qc7+–) 26.Ne4 Rd7 (26...Qh4 27.Nf6 Ree7+–) 27.Bh6 Kh8 28.Nf6 Rd3 (28...Rd4 29.Bf8 Rh4 30.Qg5 Rh5 31.Rh3 Qf8 32.Nh5 Re7 33.Nf6 Qh6 34.Qh6) 29.Rd3 Bg7 (29...Qf6 30.ef6 e5 31.Bf8 g5 32.Qg5 Rf8 33.Rh3) 30.Qh3 Bf6 31.Bg5 1–0. yulio (2000) – zd3nik (1880), gameknot.com, 2014.

4.Nc3 g6 5.Nf3 Bg7 6.Bc4 Nf6 +/–.

4.Nc3 g6 5.Nf3 Bg7 6.d4 d6 7.Bd3 Nd7 8.Be3 Ngf6 9.0–0 Ng4 10.Bf4 e5 11.Bg5 f6 (11...Qb8 12.d5+=) 12.Bc1 ed4 (12...Qc8!?+/–) 13.Nd4+– Nge5 (better is 13...Nde5 14.f3 Nd3 15.cd3 f5+–) 14.Ne6 Qe7 15.Nc7 Kf7 16.Na8 Ba8 17.Bb2 Nc5 18.Re1 Rc8 19.Bf1 a4 20.f4 a3 21.Ba3 Ned7 22.Bc4 Kf8 23.Nd5 Bd5 24.Qd5 Ke8 25.Qg8 Qf8 26.Qh7 Kd8 27.Qg6 f5 28.Rad1 Ne4 29.Rd6! Nd6 30.Bd6 (30...Rc4 31.Bf8 Bf8 32.Re8 Kc7 33.Rf8 Nf8 34.Qf7 Nd7 35.Qc4 Kd6 36.Qc6 Ke7 37.h3+–) 1–0. Trkn – guest1065, ICC, 2004.

4.d3 c5 5.a4 (5.Nf3 Nf6+=) 5...d5 (5...e6 6.Nc3=) 6.ed5+= Qd5 7.Nf3 Nf6 8.c4 (8.Be2!?+=) 8...Qd6=+ 9.Bb2 e6 10.Nbd2 Be7 11.Be2 0–0 12.0–0 Nbd7 13.Ng5 h6 (13...Rad8 14.Nge4 Qf4 15.Bf3=+) 14.Ngf3 Rad8 15.Qc2 Ng4 (15...Qf4 16.Rad1=+) 16.Ne4 Be4 (16...Qf4!?=+) 17.de4= Bf6 18.Rad1 Qc7 19.h3 (19.Bc1 Nde5 20.Ne5 Ne5+=) 19...Nge5 20.Nh2 Ng6 21.Bc1 Nde5 (21...Nf4!?=) 22.f4+= Nd7 23.e5 Nde5 (better is 23...Bh4!?+=) 24.fe5+– Be5 25.Nf3 Bg3 26.Bd3 Nf4 27.Be4 f5 28.Bc6 g5 (28...e5 29.Bb2 e4 30.Ne1+–) 29.Bb2 (29...g4 30.hg4 fg4 31.Ne5 Rd1 32.Qd1+–) 1–0. Hermann,H – Wartig,Wolfgang, corr SOK–90–55, 1990.

4.d3 d6 5.f4 Nd7 6.Nf3 e5 7.Be2 Ngf6 (7...ef4!? 8.Bb2 d5 9.ed5 Ngf6=) 8.0–0+= g6 9.c3 Bg7 10.fe5 de5 11.Qe1 0–0 12.Qh4 Ne8 13.Qh3 Nc5 14.Bh6 (14.Be3+=) 14...Bh6 (14...Bc8!? 15.g4 f6= (worse is 15...Nd3 16.Rd1+/–)) 15.Qh6+= Qe7 (15...Nd3?? 16.Ng5 Qg5 17.Qg5+–) 16.d4 Ne4 17.Ne5 N8d6 18.a4 f6 19.Ng4 (19.Nf3 Ng3 20.hg3 Qe2+=) 19...Ng5?? (better is 19...Ng3! 20.hg3 Qe2–/+) 20.Bd3= f5 21.Ne5 Ngf7 22.Nf7 Qf7 23.Nd2 Rae8 24.Rf2 Qg7 25.Qg7 Kg7 ½–½. Meynard,Thibault (2265) – Sanchez,Nicolas (2255), FRA–chT2 South, 2009.

4.d3 e5 5.Bb2 d6 6.Nf3 Be7 7.Nbd2 Nf6 8.Be2 Nbd7 9.c4 0–0 10.0–0 h6 11.Ne1 Nc5 12.f4 ef4 13.Rf4 g5 (better is 13...Ne6!? 14.Rf1 c6+=) 14.Rf1+= Ne6 15.Nef3 Ng4 (15...Nd7!?+=) 16.Ng5!+/– Ne3 (16...Ng5 17.Bg4 Discovered attack; 16...Bg5 17.Bg4 Discovered attack; 16...hg5 17.Bg4 Discovered attack) 17.Ne6 fe6 18.Rf8 Bf8 19.Qe1 Qg5 20.Qf2 Bg7 21.Bg7 Kg7 22.Nf3 Qf6?? (better is 22...Qc5+–) 23.Rb1 (better is 23.Rc1 Ng2 24.Kg2 e5+–) 23...Ng4 (23...Nc2 24.Bf1 Na3+–) 24.Qg3 h5 25.h3 1–0. tightfist (2385) – attasantotjia (2550), net–chess.com, 2014.

4.d3 e5 5.Be3 Nf6 6.c4 Bb4 7.Nd2 0–0 8.Be2 Qe7 9.Nh3 Ne8 (9...Bc3 10.Rc1 Bb4 11.0–0=) 10.0–0 Bd2 (10...a4 11.f4=) 11.Bd2 (11.Qd2 Nd6+=) 11...d6 12.Bg4+= g6 13.Bh6+/– Ng7 14.f4 f5 15.ef5 gf5 16.Bh5 Nd7 17.Bg5 Qe6 18.fe5 de5 19.Re1 Nh5= 20.Qh5 Qg6 21.Qg6 hg6 22.Rad1 Rfe8 23.Re3 f4 24.Ree1 f3 25.gf3+= Bf3 26.Rd2 Rf8 27.Rf1 Rf5= 28.Rdf2 Bg4 29.Rf5 gf5 30.Nf2 Bf3 31.Re1 Kf7 32.Re3 Bh5 33.Kg2 Re8 34.Rg3 f4=+ 35.Rh3 Kg6 36.Ne4 a4 37.a3 Rh8 38.Kf2 Kf5 39.Be7 Kg6 (40.Ke1 Re8=). Ortner,H (1820) – Trifunovic,Dusan (2030), Raika op 5th, 1996.

4.d3 e5 5.Nf3 Bc5 =.

4.d3 e5 5.Nf3 d6 6.Be2 g6 (6...Be7 7.0–0=) 7.0–0 Bg7 8.Nc3 Ne7 9.d4 Nd7 10.Be3 0–0 11.Bc4 h6 12.Re1 Kh7 13.de5 Ne5 14.Qe2?? (14.Ne5 Be5 15.Bd4 c5 16.Be5 de5+/–) 14...f5?? (better is 14...Nf3 15.Qf3 Bc3 16.Bh6 Be1 17.Bf8 Bf2 18.Qf2 Qf8 19.Bf7 Qh6–+ (19...Be4 20.Qh4 Kg7 21.Qe4+=)) 15.Nd4= f4 (15...fe4 16.Ne6 Qd7 17.Ng7 Kg7 18.Ne4=) 16.Ne6 Qd7 (16...f3 17.Qd1 Qd7 18.Nf8 Rf8=+) 17.Bf4+/– (< 17.Nf8 Rf8 18.Bf4 Rf4–+; 17.Nf4?! Nf3 18.Qf3 Bc3=; 17.Ng7? fe3 18.f3 Kg7–+) 17...Rf4? (better is 17...Nc4!? 18.Qc4 Bc3 19.Nf8 Rf8 20.Bh6 Bg7 21.Bg7 Kg7+/–) 18.Nf4+– Rf8 (18...Qg4 19.Ncd5 Nd5 20.Bd5 Qf4 21.Bb7+–) 19.Ne6 Rf6 20.Ng7 Kg7 21.Bd5 Bd5 22.ed5 Nf5 (22...Rf4 23.Qe3 g5+–) 23.f4 Nf7 (23...Nd4 24.Qe4 (24.fe5?! Ne2 25.Re2 de5 26.Re5 Qd6=+) 24...Qg4 25.fe5+–) 24.Ne4 Qe7 (24...Nd8 25.Nf6 Kf6 26.c4+–) 25.Qc4 Qd8 26.Rad1 g5 (26...Ne3 27.Re3 Rf4 28.Rc3+–) 27.Nf6 Kf6 (27...Qf6 28.Re6 Qb2+–) 28.Qc3 Kg6 29.Re6 Kh7 30.Qd3 gf4 31.Qf5 Kg7 32.Rg6 Kf8 33.Qf4 Qe7 (33...Qd7 34.Rf1 Qe8 35.Qf6 Qe3 36.Kh1 Qf2 37.Rf2 Ke8 38.Qf7 Kd8 39.Rg8) 34.Rf1 Ke8 (34...Qe8 35.Qf6 Qe3 36.Kh1 Qf2 37.Rf2 Ke8 38.Qf7 Kd8 39.Rg8) 35.Rg8 Kd7 36.Qf5 Qe6 37.Qe6# 1–0. market (2070) – bh33 (1925), GameColony.com, 2002.

4.d3 Nf6 5.e5 Nd5 6.c4 Nb4 7.a3 e6 8.Ne2 d5 9.ab4 Bb4 10.Bd2 dc4 11.dc4 Bc5 12.Qb3 0–0 13.Qg3 Re8 14.Nbc3 Bb4 15.Bg5 Qd7 16.Bf6 Bf8 17.Nf4 Kh8 18.Nh5 gf6 19.Nf6 Qd4 20.Qg8 1–0. kolya (2045) – kasxsak (1685), GameColony.com, 2002.

4.Nf3 d6 5.Nc3 Nd7 (5...Nf6 6.Qe2+=) 6.Bc4 e5 7.d4 Qe7 (7...Ngf6!?+=) 8.0–0 0–0–0 9.Ng5 Nh6 10.Nd5 Bd5 11.Bd5 ed4 12.Qd4 Nc5 13.Re1 f6 14.Be6?? (better is 14.Nf3+/–) 14...Ne6–/+ 15.Qd5 Ng5 (15...Nd4! 16.c3 Nb5 (< 16...fg5 17.Bg5 Qg5 18.Qg5=) 17.Qb5 fg5 18.Bg5 Qe5 19.Qa6 Kd7 20.Bd8 Kd8 21.Qa8 Kd7–/+) 16.Qa8= Kd7 17.Qc6 Kc8 18.Bg5?? (better is 18.Qa8 Kd7 19.Qc6 Ke6 20.Qd5 Kd7 21.Qc6=) 18...fg5–+ 19.Rad1 (19.Qa8 Kd7 20.Qc6 Ke6–+) 19...Kb8 20.e5 (20.Qd5 Ng4–+) 20...de5 21.Rd3 Rd3 (21...Nf7 22.Rd8 Qd8 23.Rf1–+) 22.cd3 Nf5 (23.Qd5 Qf6–+) 0–1. gtate (1965) – jparkinson (1830), net–chess.com, 2006.

4.Nf3 Be4!? 5.Nc3 Bb7 =+.

4.Nc3 e6

5.a3 Nf6 6.e5 Ne4 7.Ne4 Be4 8.d3 Bb7 9.Nf3 Be7 (9...d6 10.d4=) 10.d4 d6 (10...0–0 11.Bd3=) 11.ed6 cd6 12.Bd3 Nd7 13.0–0 0–0 14.Qe2 Rc8 15.Bf4 Nf6 16.Rfc1 Re8 17.c3 (17.Re1 a4=) 17...h6 (17...e5 18.de5 de5 19.Ne5+=) 18.a4 (18.Be3 d5=) 18...Rc7 (better is 18...e5!? 19.de5 de5 20.Be5 Bd6 21.Bf6 Qf6–/+) 19.c4= Qa8 20.Ne1 Be4 (20...Nd7 21.Be3=) 21.f3 Bh7 22.Bh7 Nh7 23.Kh1 Bg5 24.Bg5 Ng5= 25.c5 bc5 26.dc5 dc5 The passed pawn on b5 will quickly become a dangerous weapon 27.Nd3 e5 28.Nc5 e4 29.f4 Ne6 30.Ne6 Rc1 31.Rc1 Re6 ½–½. Van Bommel,Ton – Istomin,Sergei, L2.2000.0.00006, 2000.

5.Nf3 Bb4 =.

5.Nf3 Nf6 6.e5 Nd5 7.Nd5 Bd5 8.Be2 d6 9.0–0 Nd7 10.c4 Bb7 11.d4 de5 12.de5 Bc5 13.Bg5 f6 14.ef6 gf6 15.Bh6 Qe7 16.Nd2 0–0–0 17.Bf3 Rhg8 18.Bb7 Kb7 19.Ne4 Kb8 20.Qe2 Ba3 21.Ng3 Bd6 ½–½. Blitzmich – peze, playchess.de, 2003.

5.Nf3 Nf6 6.e5 Nd5 7.Nd5 Bd5 8.Be2 d6 9.0–0 de5 10.Ne5 Nd7 (10...Bd6 11.d4 Qf6 (11...Qh4 12.f4 0–0 13.c4 Be4 14.Be3 a4 15.Bf3 Bf3 16.Qf3 Ra5+= 0.44) 12.Ng4 Qg6 13.c4 Be4 14.Bf3 0–0 15.Re1 Bf3 16.Qf3 Nd7+= 0.37; 10...Bb4 A) 11.Bb2 f6 (11...Qg5 12.Bf3 0–0 13.c4 Bf3 14.Qf3 Ra7 15.d4 Qd2 16.Rab1 Bd6+= 0.59; 11...0–0 12.c4 Bb7 13.Bf3 Bf3 14.Qf3 Nd7 15.Nc6 Qh4 16.d3 Bd6+= 0.41) 12.c4 Bg2 13.Bh5 g6 14.Ng6 hg6 15.Bg6 Ke7 16.Kg2 Rg8= –0.22; B) 11.a3 Bd6 12.d4 Qf6 13.Ng4 Qg6 14.c4 Be4 15.Bf3 0–0 16.Re1 Bf3+= 0.37; 10...Qf6 11.d4 Bd6 12.Ng4 Qg6 13.c4 Be4 14.Bf3 0–0 15.Re1 Bf3 16.Qf3 Nd7+= 0.37) 11.Nd7 (11.d4 Ne5 12.de5 Bc5 13.Bf4 Qh4 14.Qd2 0–0 15.c4 Bb7 16.Bg5 Qd4= 0.00) 11...Qd7 12.c4 Bb7 (12...Be4 13.d3 Bf5 14.d4 0–0–0 15.Be3 e5 16.de5 Qe6+= 0.34) 13.Bf3 (13.d4 Rd8 (13...Bd6 14.Be3 Qe7 15.Bd3 Qh4 16.f4 Be7+= 0.44) 14.Be3 Bb4+= 15.Bf3 Bf3 16.Qf3 0–0+= 0.37) 13...0–0–0 (13...Bf3 14.Qf3 Rd8 15.d4= (15.Bb2 Qd3 16.Qc6 Qd7= 0.00) 15...Qd4 16.Bg5 Be7+= 0.47) 14.Bb7+= Kb7 15.Qf3 Kb8 16.Bb2 f6 (worse is 16...Qd2 17.Rad1 Qg5 18.Bf6 (18.Qf7?! Bd6+/–) 18...Qf6 19.Qf6 Rd1 20.Qf7+–; 16...a4= 0.25) 17.d4 h5 18.Rac1 h4 19.h3 Rh6 20.a4 f5 21.c5 Qd5 22.cb6 cb6 23.Qf4 Bd6 24.Qg5 Rd7 25.Rc6 Ka7 26.Rfc1 f4 27.Qg4 Rf6 28.f3+/– Rh6 29.Kh1 Kb7 30.Kh2 g5 31.Rc8 Rhh7 32.R1c6 Rdg7 33.Re8 Attacking the backward pawn on e6 33...Re7 34.Rg8 Rhg7 35.Rd8 Rd7 36.Rcc8 Bb4 (36...Bb4 37.Rb8 Ka7 38.Ra8 Qa8 39.Ra8 Ka8 40.Qe6 Ka7+/–). Hansen,Marco (2290) – Gnuechtel,Andreas (2255), CiF, 2009.

5.Nf3 Nf6 6.e5 Nh5 7.d4 Bb4 8.Qd3 f6 9.a3 Bc3 10.Qc3 0–0 11.Be2 fe5 12.de5 Nf4 13.Bf4 Rf4 14.Rd1 Ra7 15.Nd4 Bd5 16.Qg3 Qf8 17.0–0 c5 18.bc6 Nc6 19.Nb5 Ra8 20.Nc7 Nd4 21.Bd3 Rc8 22.Nd5 ed5 23.Qh3 h6 24.Qd7 Rd8 25.Qc7 Re8 26.c3 Ne6 27.Qc6 Ng5 28.Qd5 Kh8 29.Qd6 Qg8 30.Qb6 Re5 31.Rfe1 Rf6 32.Qc7 Re1 33.Re1 Qf8 34.h4 Nh7 35.Rb1 Rf7 36.Qa5 Rf2 37.Qe5 Qf7 38.Qe4 Nf8 39.Rb7 Qf4 40.Qe7 Qg3 41.Qg7 Qg7 42.Rg7 Rf4 43.Ra7 Rh4 44.a4 Ne6 45.a5 Ra4 46.a6 Nc5 47.Bf1 Ra1 48.Rc7 Na6 49.Rc6 Nb8 50.Rc8 Kg7 51.Rb8 Ra7 52.c4 Re7 53.g3 Rc7 54.Kf2 Rc6 55.Bd3 Kf6 56.Ke3 Ke7 57.Rh8 Kd7 58.Bf5 Kc7 59.Kd4 Rf6 1–0. COMP – COMP, blitz 25', 2001.

3.e4 e5

4.Bb2 d6 5.c4 Be6 6.Nc3 Nd7 7.Be2 Be7 8.Nf3 Ngf6 9.0–0 h6 10.d3 c5 11.Nd5 Nd5 12.cd5 Bg4 13.Qb3 a4 14.Qc4 0–0 15.a3 Bf6 16.h3 Bf3 17.Bf3 Qc8 18.Bc3 Bd8 19.Bg4 Qb7 20.f4 f6 21.Be6 Kh8 22.f5 g5 23.Bd2 Re8 24.h4 Nf8 25.hg5 hg5 26.Kf2 Qh7 27.Rh1 Kg7 28.Rh7 Nh7 29.Rh1 Be7 30.Qc1 Rh8 31.Qg1 Nf8 32.Rh8 Kh8 33.Qh2 Kg7 34.Qh5 Nh7 35.Qf7 Black resigned 1–0. nimzo1 – Daz101, ChessWorld.net, 2012.

4.Nf3+= Bb7 5.Bc4 Be4 6.Qe2 +=.

4.Nf3+= d6 5.d4 f6 (5...ed4 6.Bc4+=) 6.Bc4+/– Bg4 (6...c6 7.d5 c5 8.Bd3+/–) 7.de5+– Bf3? (better is 7...c6+–) 8.Qd5 (8.gf3?! Nd7+–) 8...Nd7 (8...Bh5 9.ef6 Nf6 10.Qa8 Nbd7+–) 9.Qf7# (9.gf3?! Ne5 10.Be2 Ne7+=) 1–0. Woschkat,Karl_Heinz – Glennovin, itsyourturn.com, 2000.

3.Nf3 Bb7

4.c4 e6 5.Nc3 Nf6 6.Bb2 Be7 7.e3 0–0 8.d4 d5 (8...Bb4 9.Bd3=) 9.Bd3 Nbd7 (9...dc4 10.Bc4 c6 11.0–0=) 10.cd5 Nd5 11.0–0 N7f6 12.Ne5 Nc3 13.Bc3 Bd6 14.f4 Nd5 15.Bd2 (15.Qh5 g6 16.Qf3 f6=) 15...Nf6 (15...Nf4!? 16.Bh7 Kh7 17.Rf4 Kg8=) 16.Rc1+= h6 17.a4 Bd5 18.Qc2 Rc8 (18...Ba3 19.Rcd1 Qd6+=) 19.e4 (better is 19.Nc6!? Qd7 20.e4 Bc6 21.Qc6+/–) 19...Be4 20.Nc6 (20.Be4 Be5) 20...Bd3=+ 21.Qd3 Qd7 22.Kh1 (22.Ne5 Qe8=+) 22...Nd5=+ 23.f5 ef5 24.Rf5 Qe6 (24...Ne7 25.Ne7 Be7 26.Bf4=+) 25.Re1= Qg6 26.Qh3 (better is 26.Qf3 Nf6 27.Ne5 Be5 28.Rfe5=+) 26...Rce8+– 27.Ref1?? (27.Rd5 Re1 28.Be1 Qe4 29.Ne7 Kh8=+ (< 29...Be7 30.Re5 Qf4 31.Qd3=+)) 27...f6?? (better is 27...Qe6=+) 28.Rd5 Re2 29.Qf3 Rd2 30.Rd6! Kh8? 31.Rd7 Re8 32.Ne7 Qc2 33.h3 Re2 34.Nf5 Re1 35.Re1 Re1 36.Kh2 Qe4 37.Qe4 Re4 38.Ng7 Re3 39.Nh5 Kg8 40.Nf6 Kf8 41.Rc7 Ra3 42.Nd7 Ke8 43.Nb6 Kd8 44.Rd7 Ke8 45.Ra7 Kd8 46.d5 h5 47.d6 Ke8 48.Rh7 Rd3 49.d7 Kf8 50.Rh5 Ke7 51.Rh8 Rd2 52.Re8 (52...Kf6 53.h4+–) 1–0. Czernicki,B – Orlicki,A, Rudnik, 1992.

4.c4 e6 5.e3 Nf6 6.Be2 Be7 7.Bb2 0–0 8.0–0 c5 9.bc6 Nc6 10.Nc3 Rc8 11.Na4 d5 12.Bf6 Bf6 13.Rb1 Attacking the backward pawn on b6 13...Ne5 (13...dc4!? 14.Nb6 Rb8+=) 14.Nb6+/– Rb8 15.c5 Nc6 16.d4 Qc7 17.Qa4 Be7 18.Bb5 f6 19.Nd2 e5?? (better is 19...f5+–) 20.Nd5 (20.Nd5 Qd7 21.Bc6 Bc6 22.Qc6+–) 1–0. forsetinn (2435) – heaterhog (2050), gameknot.com, 2015.

4.d3 c6 5.Nc3 =.

4.d3 g6 5.Bb2 Bg7?? (better is 5...f6+=) 6.Bg7+– Nf6 (6...f6 7.Bh8 Kf7 8.Qd2+–) 7.Bh8 d6 8.e4 Nbd7 9.Be2 Ne5 (9...Kf8 10.Bf6 Nf6 11.0–0+–) 10.Ne5 de5 11.0–0 Qd4 (11...Kf8 12.Bf6 ef6 13.c3+–) 12.c3 Qc5 13.Qa4 0–0–0 14.Bg7 Rg8 15.Bh6 Nd7 (15...g5 16.Qb3 e6 17.Qa3+–) 16.Be3 Qd6 17.Nd2 Nc5 (17...Rd8 18.Nf3+–) 18.Qc4 Ne6 19.d4 ed4 20.cd4 f5 21.Bf4! Nf4 (21...Qf4 22.Qe6) 22.Qg8 Kd7 (22...Qd8 23.Qd8 Kd8 24.Bc4+–) 23.Bf3 Qd4 24.Nb3 fe4 25.Bg4 e6 26.Nd4 Ke7 27.Ne6 (27....Ne6 28.Qe6 Kf8 29.Qf6 Ke8 30.Rad1 Bd5 31.Rd5 c5 32.Rd8) 1–0. market (1925) – NN, GameColony.com, 2002.

4.e3 d6 5.Bb2 (--> 3.e3 Bb7 4.Bb2 d6 5.Nf3).

4.e3 d6 5.d4 Nd7 6.c4 g6 7.Bb2 Ngf6 8.Bd3 e5 9.de5 de5 10.Nbd2 (10.Nc3 a4 11.a3 Bg7+=) 10...Bd6+= 11.0–0 Qe7 12.Bc2 0–0 13.Qe2 Nc5 Black intends e4 14.Rad1 Rfd8 15.Ng5 h6 16.Nh3 e4 17.f3 (17.Nf4 a4–/+) 17...ef3 18.gf3 Nh5 19.Qf2? (better is 19.Rfe1!?–/+) 19...Qe6–+ 20.Kg2?? (better is 20.Qg2 Qe3 21.Qf2–+) 20...Qg4 21.Kh1 Qh3 22.Kg1 Be7 23.Bd4 Ne6 (better is 23...Qe6 24.Rc1–+) 24.Be5 (24.Be4 Be4 25.fe4 Nd4 26.ed4 Nf6–+) 24...Bc5 25.Ne4 (25.Rde1 f5–+) 25...Rd1 26.Rd1 Ng5 27.Ng5 hg5 28.Rf1 (28.Re1 Re8 29.Qg2 Qg2 30.Kg2 Re5–+) 28...Rd8 29.Rd1 (29.Bb3 Nf4! 30.Bf4 gf4–+) 29...Re8 30.Bd4 (30.Qg2 Be3 31.Kf1 Qe6 32.Bc7 Qc4 33.Qe2 Qc7–+) 30...Bf3 31.Bc5 Qg4 32.Kf1 Bd1 33.Bd4 Nf4! 34.ef4 Bc2 35.Be5 (35.Qd2 Qf3 36.Bf2 Bf5 37.Qd7 Bd7 38.f5 Re2 39.Kg1 Qf2 40.Kh1 Qh2) 35...gf4 36.Qc2 (36.Qd4 Qf3 37.Qf2 Bd3 38.Ke1 Re5 39.Kd2 Qf2 40.Kc3 Qc2 41.Kd4 Qb2 42.Kd3 Re3) 36...Re5 0–1. decu40 (1950) – marekt (2150), gameknot.com, 2015.

4.e3 d6 5.d4 g6 6.Bd3 Bg7 7.0–0 Nf6 8.Nbd2 0–0 9.Bb2 Nbd7 10.Qe2 Re8 11.Rad1 e5 12.de5 de5 13.Bc4 h6 14.Nh4 Bd5 (better is 14...c6+=) 15.Ng6 fg6 16.Bd5 Nd5 17.Qc4 N7f6 18.Ne4 Ne4 19.Rd5 (19...Qh4 20.Rd4 Kh8 21.Re4+–) 1–0. pcmvr (2715) – gtan (2290), net–chess.com, 2006.

4.e3 e6 5.Bb2 (--> 3.e3 Bb7 4.Bb2 e6 5.Nf3).

4.e3 e6 5.Bb2 Nf6 6.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 a5 6.b5).

4.e3 Nf6 5.c4 d6 6.d4+= Nbd7 7.Nc3 e5 8.Be2 ed4 9.Qd4 Be7 10.Bb2 (10.0–0 Nc5+=) 10...0–0 (10...a4 11.0–0+=) 11.Nd5 Bd5 (11...Re8!?+=) 12.cd5+/– Ne8 13.Qf4 Bf6 14.Nd4 Ne5 15.0–0 Rc8 16.Qg3 g6? (better is 16...Qe7+/–) 17.f4+– (17...Bh4 18.Qh3+–) 1–0. pcmvr (2645) – gtan (2280), net–chess.com, 2006.

4.e3 Nf6 5.c4 e6 6.Be2 =.

4.e3 Nf6 5.c4 g6 6.d4 Bg7 7.Bb2 0–0 8.Nbd2 d6 9.Be2 Nbd7 10.0–0 Re8 11.Ne1 (11.Qc2 e5=) 11...e5 12.Bf3 (12.Nd3 Qe7+=) 12...e4 13.Be2 d5 (13...Qe7 14.Nc2+=) 14.Rc1 (14.Qa4 dc4 15.Nc4 Nd5=) 14...c6 (14...Qe7 15.Nc2+=) 15.bc6= Bc6 16.Ba3 Bb7 (16...Rc8 17.Qb3=) 17.Qb3 h5 (17...Rc8 18.Nc2=) 18.Bd6 (18.h3 Bc6+=) 18...Nf8 (18...Re6 19.Bg3=) 19.Be5 N8d7 20.Bf4 (20.Bg3 Qe7+=) 20...Rc8 (20...a4 21.Qb2 Re6 22.Bg5+=) 21.f3 h4 22.Bg5 h3 23.fe4 de4 24.Rb1 hg2= 25.Ng2 Qc7 26.Bf6+= Bf6 27.c5 Kg7 28.cb6 Qd6? 29.Nc4+– Qb8 30.Nf4 Rh8 31.Na5 Rh4 32.Nb7 Qb7 33.a4 Rch8 34.Rf2 Bg5 35.a5 Bf4 36.Rf4 Rf4 37.ef4 1–0. pcmvr (2740) – gtan (2175), net–chess.com, 2007.

4.g3 e5 5.Bg2 d6 6.d3 g6 (6...Be7 7.0–0=) 7.0–0+= Bg7 8.e4 (8.c3 Nf6+=) 8...Ne7= 9.Nbd2 Nd7 10.a4 0–0 11.Bb2 f5 12.Ng5 Rf6 13.f4 h6 14.fe5 Ne5 15.Ngf3 Rf8 16.Ne5 Be5 17.Be5 de5 18.Nb3 Qd6 19.Qe2 Rae8 20.d4 fe4 21.Be4 Be4 22.Qe4 Nf5 23.d5 Kg7 24.Rae1 h5 25.Qc4 Rf7 26.Nd4?? (better is 26.Qd3=) 26...Nd4–+ 27.Rf7 Kf7 28.Rf1 Kg7 0–1. Boysan,Ferit – Sosa Harrison,Jorge (2255), Internet Section, 2004.

3.Nf3 Nf6

4.Bb2 Bb7 5.e3 (--> 3.Bb2 Bb7 4.e3 Nf6 5.Nf3).

4.c4 Bb7 5.e3 g6 6.d4 d5 7.Bb2 (7.Bd3 Nbd7 8.0–0 dc4 9.Bc4 e6+=) 7...e6 8.Be2 Bb4 9.Nbd2 0–0 10.0–0 c6 11.a3 Be7 12.bc6 Nc6 13.Re1 (13.Rc1 Re8+=) 13...Ba6 (13...dc4 14.Bc4 a4 15.Rc1+/–) 14.cd5 Be2 15.Qe2 ed5 16.Rac1 Qd7 17.Nb1 (17.Ne5 Ne5 18.de5 Ne4+=) 17...Qb7 (17...Rfc8 18.Nc3=) 18.Nc3+= Rfd8 (18...Rfc8 19.Ne5+=) 19.Ne5 Rac8 20.Red1 Ne4 21.Nb5 Ne5 22.de5 Rc1 23.Rc1 Rc8 24.Rd1 (24.Rc8 Qc8 25.f3 Ng5+=) 24...Qc6= 25.f3 Qc2 26.Re1 Ng5 27.Nd6 Rc6 28.Kf1 Ne6 (28...Qe2 29.Re2 f6 30.Nb5=) 29.Rc1 Qa4 30.Rc6 Qc6 31.Qb5 Qc2 32.Qe8 Kg7 33.Qf7 Kh6 34.Qe6 Qd1 ½–½. pman3660 (2260) – yzerman123 (2335), gameknot.com, 2015.

2.b5 c5

3.Ba3 b6 4.e4 Bb7 5.Nc3 e6 6.Bc4 d5 7.ed5 ed5 8.Qe2 Ne7 9.Bd3 Qd7 10.Nf3 c4 11.Bc4 dc4 12.Ne5 Qe6 13.0–0 Nd5 14.Bb2 Nc3 15.Bc3 Nd7 16.d4 Ne5 17.d5 Bd5 18.Be5 f6 19.Rfe1 0–0–0 20.Rad1 fe5 21.Qh5 e4 22.Kh1 Bc5 23.f4 ef3 24.gf3 Qd6 25.Qf5 Rd7 26.Rd5 Qd5 27.Qf4 Rf8 28.Re5 Qd1 0–1. Tricky.1 – PassedPawn, ChessWorld.net, 2005.

3.a4 b6 (--> 2.b5 b6 3.a4 c5).

3.a4 c4 4.Bb2 d5 5.e3 f6 6.Nf3 e5 7.Be2 b6 8.0–0 Bc5 9.d4 cd3 10.cd3 (worse is 10.Bd3 e4 11.Be4 de4 12.Qd8 Kd8–/+) 10...Bb7 (better is 10...Bd6!?+=) 11.d4+– ed4 12.Nd4 Ne7 13.Ne6 Qd6 14.Ng7 Kf7 15.Nh5 Rg8? (better is 15...Nd7+–) 16.Nf6 (16.Bf6?! Nd7 17.Bc3 Raf8+–) 16...Rg7 17.Bh5 Kf8 18.Qf3 d4 19.e4 Ng6+– 20.Bg6 hg6 21.Nd5 Kg8 22.Nd2 Nd7 23.Qb3 Bd5 24.ed5 Re8 25.Rae1 Rge7 26.Re7 Re7 27.Qg3?? Qf6? 28.f3?? Re2?? 29.Ne4?? Qf5?? 30.Ba1?? Qd5?? 31.Qg6+– Kf8 32.Qh6 Ke7 33.Qg7 Kd8 34.Nf6 d3 35.Kh1 Nf6 36.Bf6 Be7 37.Qf8 Kd7 38.Be7 Re7 39.Qb8?? d2–/+ 40.Qa7 Ke8 (40...Ke8 41.Qb8 Kd7 42.Qa7 Kc8 43.Qe7 d1Q 44.Qe8 Kc7–/+) 0–1. antyciemnota – hamsterek (1755), kurnik, 2012.

3.a4 d6 4.Bb2 e5 5.c4 Be6 6.e3 Nd7 7.d3 f5 8.Be2 Ngf6 9.Nd2 Be7 10.Bf3 Rb8 11.Qc2 0–0 12.Ne2 Kh8 13.g3 Qe8 14.Nb3 b6 15.Nd2 g5 16.Bc6 Qh5 17.h4 Ng4 (better is 17...g4!?+=) 18.hg5+/– Qg5 19.Nf3 Qg7 20.Nf4! Qf7 (20...ef4 21.Bg7 Double attack (21.Bg7 Pinning; 21.Bg7 Deflection; 21.Bg7 Decoy)) 21.Qe2 Bf6 22.Ne6 Qe6 23.Bd5 Qe7 24.Nh4 Bh4 25.Rh4 Ngf6 26.Bc6 Rg8 27.0–0–0 Rg7 28.Rdh1 Rbg8 29.Qf3 Qe6 30.Rh6 Rg6? (better is 30...Qe7+–) 31.Bd5 Qe7 32.Bg8 Kg8 33.Qf5 Qf7 34.Rg6 hg6 35.Qh3 Kf8 36.Qh6 Ke7 37.Qg5 e4 38.Kd2 ed3 39.Kd3 d5 40.Bf6 Nf6 41.cd5 Kd6 42.Rh6 c4 43.Kd4 Qe7 44.Qf4 Kd7 45.d6 Qe6 46.e4 c3 47.Rg6 Qe4 48.Qe4 Ne4 49.Kd3 Nf2 50.Kc3 Ne4 51.Kd4 Nc5 52.Kd5 Kd8 53.Kc6 Ke8 54.d7! Nd7 55.Rg8 Kf7 56.Kd7 (56.Kd7 Kg8 57.Kc6+–) 1–0. Diviak,Rudolf (1955) – Sukuba,Zdeno (2105), SVK–chT2A, 2005.

3.a4 Nf6 4.Bb2 e6 5.c4 b6 6.d3 d5 7.e3 dc4 8.Qf3 Ra7 9.dc4 Bb7 10.Qd1 (10.Bf6!? Qf6 11.Qf6 gf6 12.Nd2=) 10...Qd1–/+ 11.Kd1 Be7 12.f3 0–0 13.Be2 Rd8 14.Ke1 Ng4 15.fg4 Bg2 16.Bf3 Bh1 17.Bh1 Rad7 18.Bf3 (18.Be5+=) 18...Rd3 (18...Bh4 19.Kf1 Rd2 20.Nd2 Rd2 21.Be2 Rb2 22.Nf3–/+) 19.Ra3 (19.Ke2 Rb3 20.Be5 Bf6 21.Bf6 gf6=) 19...Ra3?? (better is 19...Bh4 20.Kf1 Rd1 21.Bd1 Rd1 22.Kg2 Rb1–/+) 20.Na3+= f6 (20...Bd6 21.h3 Bg3 22.Ke2=) 21.Ne2 Bd6 22.h3 Kf7 23.Nb1 Bc7 24.Nd2 Nd7 25.Ne4 (25.Be4 Ne5 26.Be5 Be5+=) 25...Ne5= 26.Be5 Be5 27.Nc1 Bc7 28.Ke2 Ke7 29.Nd3 g6 30.h4 f5 31.gf5 gf5 32.Nef2 Bg3 33.h5 e5 34.Bd5 Kf6 35.Nh3 Bh4 0–1. Nyikos,Laszlo – Biehler,Peter, Brandenburg–ch Seniors, 2005.

3.Bb2 a4 4.a3 e6 5.c4 d5 6.e3 b6 7.Nf3 Bb7 8.Nc3 d4 9.Na4 d3 10.Nc3 f6 11.Qb1 Bf3 12.gf3 Bd6 13.Bd3 f5 14.Qc2 Qc7 15.f4 Nf6 16.Rg1 0–0 17.0–0–0 Ng4 18.Rg2 g6 19.f3 Nf6 20.Rdg1 Nbd7 21.h4 Ra7 22.e4 Bf4 23.ef5 ef5 24.Bf5 Ne5 25.Be6 Kg7 26.Nd5 Nd5 27.Bd5 Kh6 28.h5 g5 29.Kb1 Rfa8 30.Ba8 Ra8 31.Qe4 Ra4 32.d3 Nf7 33.Re2 1–0. ferminkatcho (1755) – madera110 (1795), kurnik, 2012.

3.Bb2 d5 (--> 1.b4 a5 2.b5 d5 3.Bb2 c5).

3.Bb2 e5 4.Be5+= d6 5.Bb2 f5 (5...d5 6.Nf3+=) 6.e3 h5 (6...Nf6!?+/–) 7.Nf3 d5 8.c4 Rh7 (8...Be6 9.cd5 Bd5 10.Nc3+–) 9.cd5 g5 (9...Nf6 10.Bf6 Qf6 11.d4+–) 10.h3 (10.Bc4 Nd7+–) 10...h4 11.Bc4 b6 (11...Nd7 12.Nc3+–) 12.Nc3 Re7 (12...Bd6+–) 13.Ng5 Re5 (13...Nf6+–) 14.Qh5 Ke7 (14...Kd7 15.Nf7 Qc7+–) 15.Qf7 Kd6 16.Qg8 (16.Nce4! Re4 17.Ne4 fe4 18.Be5 Ke5 19.Qf4) 16...f4 (16...Re7 17.Qg6 Kc7 18.d6 Qd6 19.Nd5 Kb7 20.Qd6 Re3 21.de3 Bd6+–) 17.Nf7 Kd7 18.Nd8 Kd8 19.Qf8 Re8 20.Qf6 Re7 21.Ne4 (21.d6 Raa7 22.Nd5 Bf5 23.de7 Kd7 24.Qf5 Ke8 25.Qc8 Kf7 26.e8Q) 21...fe3 22.d6 Kd7 (22...ed2 23.Kd2 Bd7 24.Qe7 Kc8 25.Bd5 Nc6 26.Bc6 Kb8 27.Qd8 Ka7 28.Qa8) 23.Qe7 1–0. Fournier,Frederic – elanonimo16, Active, 2008.

3.bc6 (--> 1.b4 a5 2.b5 c6 3.bc6).

3.d4 b6 4.dc5 bc5 5.c4 Bb7 6.Bb2 d6 7.Nc3 Nf6 8.a4 Nbd7 9.f3 e5 10.e4 Be7 11.Bd3 0–0 12.Nge2 Nb6 13.0–0 Nh5 14.g4 Nf4 15.Bc1 (15.Nf4 ef4 16.Qd2 Bf6+=) 15...Ne6 16.Ng3 g6 17.Nce2 Nd4 18.Nd4 cd4 19.Ba3 Rc8 20.Rc1 (better is 20.Qb3!?+=) 20...Bg5–/+ 21.Rc2 Be3 22.Kg2 Nd7?? (better is 22...Na4!? 23.Bc1 Bc1 24.Qc1 Nc5–/+) 23.Bc1?? (better is 23.Bd6 Re8 24.c5+/–) 23...Bc1+= 24.Rc1 Nc5 25.Ra1 Rc7 26.h4 Bc8 27.h5 Qg5 28.Rb1 Bd7 29.Rh1 Rb7 30.Bc2 Qe3 31.Qe2 Qc3 32.Rhc1 d3 33.Bd3 Qd3–/+ 34.Rd1 Qe2 35.Ne2 Na4 36.Rd6 Be6 37.Ra1 Nc5 38.Rc6 Rc8 39.Ra5 Bc4?? 40.Rc8+– Kg7 41.Rc5 Be2 42.Kf2 Bd3 43.Ke3 Bf1 44.hg6 hg6 45.Re5 f6 46.Rc5 g5 47.Kd4 Kg6 48.Kd5 Be2 49.Kc6 Rh7 50.Rc3 Rh3 51.Raa3 Rh7 52.b6 1–0. greg1123 (1915) – fontolos (1835), kurnik, 2012.

3.e4 Qc7 4.Nf3 Qf4 5.Nc3 a4 6.d4+– Qc7?? 7.Nd5 Qa5 8.Bd2 Qd8 9.b6 e6 10.Nc7 Ke7 11.dc5 d6 12.Bb4 dc5 13.Bc5 Kf6 14.Qd8 Ne7 15.Ne8 Kg6 16.Ne5 Kh6 17.Qd2 g5 18.h4 f6 19.hg5 1–0. michaelbuss – The Sid Master, ChessWorld.net, 2006.

3.e4 e6 4.Nf3 d5 5.ed5 (5.e5 Be7+=) 5...ed5= 6.Qe2 Qe7 7.h3 Bf5 8.d4 (8.d3!?=) 8...Bc2 9.Nc3 Qe2 10.Be2 Nf6 11.Bg5 Nbd7 12.Bf6 Nf6 13.0–0 (13.dc5 Bc5 14.Rc1 Be4–/+) 13...c4 14.g4 Bb4 15.Nd5? (better is 15.Rac1!? Bc3 16.Rc2–+) 15...Nd5 16.Bc4 Nf4 17.Rac1 Bg6 18.Bb3? (18.h4–+) 18…Nh3 (19.Kh2 a4–+) 0–1. monas – PassedPawn, ChessWorld.net, 2005.

3.Nf3 d5 4.d3 Bf5 5.Nc3 Nf6 6.e3 e6 7.Nh4 Bg4 8.f3 Bh5 9.g3 Bd6 10.Bg2 Nbd7 11.Qd2 0–0 12.0–0 Nb6 13.Bb2 g5 14.g4 gh4 15.gh5 Nh5 16.f4 f5 17.Bf3 Nf6 18.Kh1 Kf7 19.Rg1 Qc7 20.Qf2 d4 21.ed4 Bf4? (better is 21...Rg8+–) 22.dc5 Nbd7 23.Ne2 Rg8 (23...h3+–) 24.b6 Rg1 25.Rg1 (25.Kg1?! Rg8 26.Kh1 Qb8+–; 25.Ng1?! Qc5 26.Bd4 Qd6 27.Bf6 Nf6+=) 25...Qb8 26.Qg2 (< 26.Qh4 Bh2 27.Rg2 Be5+–) 26...Bh6 27.Bf6 Nf6 28.Bb7 Ng4 29.Bf3 (29.Ba8 h3 30.Qg3 Qa8 31.Rg2 Qd5–/+ (31...hg2 32.Qg2 Qc8 33.b7=)) 29...h3 30.Qg3 (30...Qg3 31.Rg3+– (31.Ng3?? Nf2)) 1–0. marre (1965) – SDR84 (1945), GameColony.com, 2003.

3.Nf3 f6 4.Bb2 e5 5.e3 d5 6.c4 d4 7.d3 Bd6 8.Be2 Ne7 9.0–0 0–0 10.e4 b6 11.a4 Be6 12.h3 Nd7 13.Nbd2 Qc7 14.Nh2 Kf7 15.Bc1 Ke8 16.Re1 Kd8 17.Ndf1 Kc8 18.Bg4 f5 19.ef5 Bf5 20.Bf5 Nf5 21.Nf3 h6 22.Qe2 Kb8 23.Qe4 Ka7 24.Qd5 The pressure on the backward pawn e5 grows 24...Rae8 25.Qe4= g5 26.N1h2 Rf7 27.Ng4 h5 28.Ng5 Rg7 29.Nh2 Reg8? 30.Ne6?? Qc8?? 31.Ng7+– Ng7 32.Kh1 Qf8 33.Qc6 Qe7 34.Nf3 Ne6 35.Bd2 Nd8 36.Qd5?? Ne6?? 37.Ne5 Ne5 38.Re5 (38.Re5 Be5 39.Re1+–) 1–0. anonymouuus – wierszawers, kurnik, 2012.

3.g3 d5= 4.Bg2 b6 (4...e5 5.c4=) 5.Bb2 Bb7 6.Nf3 e6 7.0–0 Nd7 8.e3 Ngf6 9.Qe2 Qc7 10.c4 Bd6 11.Nc3 0–0–0 (11...dc4 12.Qc4 Bf3 13.Bf3+=) 12.d4 (12.cd5 ed5 13.d4 c4+/–) 12...Ne4? (better is 12...cd4 13.Nd4 Qc4= (worse is 13...dc4 14.Nc6+/–)) 13.cd5 Nc3 14.Bc3 Bd5 15.dc5 Nc5 16.Rac1 f6 17.Nd4 Bg2 18.Kg2 e5 19.Nc6 Rd7 20.Rfd1 Kb7 21.Qe1 Rc8 22.Ba5 ba5 23.Na5 Ka8 24.Nc6 Qb6+= 25.Rb1 Rc6 26.bc6+= Qc6 27.Kg1 Ne6? 28.Qa5+– Ra7 29.Qd2?? Bb8 30.Rdc1+– Qe4? 31.Qb2 Bd6?? 32.Rc8 (32.Rc8 Bb8 33.Rb8#) 1–0. polynesia46 (1695) – carocan (1680), kurnik, 2011.

3.a4 d5

4.Bb2 d4 5.d3 e5 6.Nd2 Nf6 7.g3 Be6 8.Bg2 Bd5 9.Ngf3 Bd6 10.c4 Be6 11.e4 Qd7 12.0–0 Bh3 13.Ne1 Bg2 14.Ng2 Qh3 15.f3 h5 16.Rf2 h4 17.gh4 (better is 17.Nh4!? g6 18.Nb3=) 17...Nh5 18.Nf1 Nf4 19.Nf4 ef4 20.Rg2 Rh6 (better is 20...Be5!?+=) 21.Rg7+= Rg6 22.Rg6 fg6 23.Qe2 Qh4 24.Qf2 Qh5 25.Qg2 Nd7 26.Bc1 0–0–0 27.Qg4 Qh6 28.Ra2 g5 29.Rg2 Rg8 30.h4! Kc7 31.hg5 Qh1?? 32.Kh1+– Ne5 33.Qf4 Nd3 34.Qf7 (34.Qf7 Kd8 35.Qg8 Kc7 36.g6 Nc1 37.b6 Kd7 38.Qf7 Be7 39.Qf5 Kc6 40.Qe6 Bd6 41.Qc8 Kb6 42.Rb2 Nb3 43.Rb3 Ka6 44.Qb7) 1–0. cibis (1645) – trix21, kurnik, 2011.

4.Bb2 Nd7 5.f4 (5.Nf3 Ngf6=) 5...Ngf6 6.Nf3 g6 7.g3 (7.e3 Bg7=) 7...Bg7=+ 8.Bg2 0–0 9.0–0 b6 10.Ne5 Bb7 11.e3 Rc8 12.d3 e6 13.Nd2 Ne5 14.Be5 Ne8 15.Bg7 Ng7 16.Nf3 Nf5= 17.Re1 Rc7 18.g4 Nh4 19.Nh4 Qh4 20.Rf1 Qf6 21.Qd2 h6 22.c3 d4 23.ed4 Bg2=+ 24.Qg2 cd4 25.c4 Kg7 26.Rae1 Rc5 27.Qb7 Qd8 28.Qf3 Qd6 29.Kh1 Rd8 30.h4 h5 31.g5 Rd7 32.Re4 Rf5 33.Rfe1 Qb4 34.Qd1 Qd6 35.Qf3 Qb4 36.Qd1 Qd6 37.Qd2 Qa3 38.Re5 Qa4 39.Qb2? Rf4–+ 40.R5e4? Re4 41.de4 Qc4 42.Rc1 Qd3 43.Qg2 Qb5 44.Qf3 Qe5 45.Rc8 d3 46.Kg2 d2 47.Qa3 Qe4 48.Kh2 Qh4 49.Kg2 Qg5 50.Kh2 Qf4 51.Kg2 Qe4 52.Kf2 Qb4 53.Qg3 Qd4 54.Kg2 Qg4 55.Kh2 Qg3 56.Kg3 d1Q 57.Kh3 Qg4 58.Kh2 Rd2 59.Kh1 Qg2# 0–1. Roesch,Gerald – Schatz,Werner, Regionalliga NO, 1996.

4.Bb2 Bf5 5.e3 b6 6.c4 Nf6 7.Nc3 e6 8.cd5 ed5 9.Nf3 Bg4 10.Be2 Bd6 11.d4 c4 12.h3 Bh5 13.0–0 0–0 14.Nh2 Nbd7 15.Bh5 Ne4 16.Be2 Ndf6 17.Nf3 Bc7 18.Ne4 Ne4 19.Nd2 Qd6 20.f4 Ng3 21.Rf3 Qg6 22.Qe1 Nf5 23.g4 Nd6 24.Rg3 Qc2 25.Qc1 Qg6 26.Bf3 Ne4 27.Ne4 de4 28.Be2 Qe6 29.Qc4 1–0. msits – jura1946, kurnik, 2012.

4.Bb2 Bf5 5.e3 Nf6 6.Nf3 e6 7.Be2 Be7 8.0–0 0–0 9.Nh4 Bg6 10.Ng6 fg6 11.c4 d4 12.Bf3+= Qd7 13.d3 e5 14.ed4 ed4= 15.Nd2 Bd6 16.Ne4 Ne4= 17.Be4 Qc7 18.h3 Nd7 19.Re1 Bh2 20.Kh1 Bg3?? 21.Re2?? Rf6?? 22.Kg1?? Bh2= 23.Kh1 Raf8 24.f3 Qg3 25.Qe1 Qd6? 26.Bb7+– Ne5 27.Be4 g5 28.Ba3 Bf4 29.Qa5 g4 30.fg4 Ng4 31.Qe1 Be3?? 32.g3= Rf1?? 33.Qf1+– Rf1 34.Rf1 Qg3 35.Bd5 Kh8 36.Rf8# 1–0. Andre,Karl – Wartig,Wolfgang, corr, (year?).

4.Bb2 Nf6 5.Nf3 =.

4.Bb2 Bg4 5.g3 e6 6.Bg2 Nd7 7.Nf3 Ngf6 8.d3 Be7 9.Nbd2 0–0 10.0–0 Qc7 11.c4 d4 12.Bc1 Rad8 13.Nb3 b6 14.Bd2 Rde8 15.Qe1 Bd8 16.h3 Bh5 17.Nh2 Bg6 18.f4 Kh8 19.Nf3 h6 20.g4 e5 21.g5 Ng8 22.gh6 Nh6 23.Ng5 f6 24.Bd5?? fg5–+ 25.Qg3? ef4 26.Qg2 Qe5 27.Rf2 Bh7 28.Raf1 Nf5 29.Bc6 Ne3 30.Be3 de3 31.Rf3 Re7 32.Qg4 Nf6 33.Qg2 Ref7 34.h4 Nh5 35.hg5 Qg5 36.Rh3 Qg2 37.Kg2 Ng3 38.Re1 g5 39.d4 cd4 40.Nd4 Kg8 41.Ne6 Be4 42.Be4 Ne4 43.Reh1 Bf6 44.Nf8 Kf8 45.Kf3 Nd2 46.Kg4 Nc4 47.Rh6 Nd6 48.Rd1 Kg7 49.Rdh1 Ne4 50.Rh7 Kf8 51.Rf7 Kf7 52.Rh7 Kg6 53.Rb7 Bd4 54.Rc7 Bc5 55.Rc6 Nd6 56.Rc7 Ne4 57.Rc6 Nf6 58.Kf3 Kf5 59.Rc8 g4 60.Kg2 f3! 61.ef3 e2 (61...e2 62.fg4 Kg4 63.Rc5 e1Q 64.Rc4 Kg5 65.Rc7 Qe4 66.Kg1 Qg4 67.Kf2 Qf4 68.Ke2 Qc7 69.Kd3 Qd6 70.Kc3 Qa3 71.Kd4 Qb3 72.Ke5 Qd5#) 0–1. Grabmeier,Johannes (1965) – Wolf,Andreas (1855), Niederbayernliga, 2007.

4.d4 c4 5.Ba3 (5.e4 e6=) 5...Nf6 6.Nf3 Bg4 7.Ne5 e6 (7...Bf5 8.f3=) 8.Bf8 Kf8 9.Qc1 (9.Ng4 Ng4 10.e4 Qg5+=) 9...Nbd7 10.Ng4 Ng4 11.h3 Ngf6 12.Nc3 Qe7 (12...h5 13.e3=) 13.g3 (13.Qd2 Kg8=) 13...Qb4 (13...h5 14.Bg2=) 14.Qa3 (14.Qd2 h5=) 14…g6 (14...g6 15.Bg2 Ke7=; 14...Ra7 15.Bg2=). Olej,Emil – Wartig,Wolfgang, corr 3GMM–42, 1995.

4.d4 cd4 5.Qd4 Bf5 6.c4 dc4 7.Qc4 +=.

4.e3 e5 5.Bb2 d4 6.ed4 ed4 7.Nf3 Bg4 8.Be2 Be6 9.d3 Nd7 (9...Nf6 10.c3=) 10.0–0 (10.c3 dc3 11.Nc3 Ngf6=) 10...Bd6 (10...Ngf6 11.c3=) 11.h3 (11.c3 dc3 12.Nc3 Ngf6=) 11...Rc8 12.Nbd2 b6 (12...Ngf6 13.Ne4 Bf4 14.Bc1 Ne4 15.de4+=) 13.c3 dc3 14.Bc3 f6 (14...Ngf6 15.Ng5=) 15.d4 Bc7 (15...Ne7 16.Ne4 Bb8 17.dc5+=) 16.dc5 (16.Bc4 cd4 17.Bd4 Bc4 18.Nc4 Ne7+/–) 16...Nc5+= 17.Nc4 (17.Nd4 Qd6 18.N2f3 Bf7+=) 17...Ne7 18.Qd8 Rd8 (18...Bd8? 19.Nd6 Kf8 20.Nc8 Nc8 21.Nd4+–) 19.Bd4 Bc4 (19...Nb3!? 20.Rad1 Nd5=) 20.Bc4+= Bd6 21.Bc5 Bc5 22.Rfd1 Ng6 23.Rd8 Kd8 24.Rd1 Kc7 25.Nd4 Bd4 26.Rd4+= Ne5 27.Bb3 Rd8 28.Rd8 Kd8 29.Kf1 g5 30.g3 h5 31.Ke2 Ke7 32.Ke3 Kd6 33.f4 Nd7= 34.fg5 fg5 35.Bd1 h4 36.gh4 gh4 37.Kf4 Kc5 38.Kg5 Kb4 39.Kh4 Nc5 40.Kg5 Na4?? 41.h4 Nc3?? 42.Bc2?? a4= 43.Ba4 Ka4 44.h5 Nb5?? 45.h6+– Nc3 46.h7 b5 47.h8Q b4 48.Qa8 Kb3 49.Qa1 Kc2 50.Kf4 b3= 51.Qh1 b2 52.Qg2 Kc1 53.Qg1 Nd1?? 54.Qc5+– Kd2 55.Qb4 Kc2 56.Qe4 Kc1 57.Qc4 Kd2 58.Qd4 Kc2?? 59.Qc4 Nc3= 60.Ke3 b1Q 61.Qd3 Kb2 62.Qb1 Nb1 ½–½. Fournier,Frederic (1905) – rufinov (1820), Active (5/0), 2005.

4.e3 e5 5.Bb2 f6 6.Ne2 Be6 7.g3 Bd6 8.Bg2 Qc7 9.f4 Ne7 10.fe5 fe5 11.0–0 Nd7 12.d4 0–0–0 13.Nbc3 Rhf8 14.Rf8 Rf8 15.de5 Be5 16.Nf4 Bf4 17.ef4 d4 18.Ne4 Nf5 19.Ng5 Bg8 20.Bh3 Nb6 21.Qe1 Nd5 22.c3 dc3 23.Bc3 Nc3 24.Qc3 Kb8 25.Rc1 b6 26.Re1 Nd4 27.Bg2 Rd8 28.h4 h6 29.Nf3 Nf3 30.Bf3 Bd5 31.Bd5 Rd5 32.Re8 Ka7 33.Rg8 Rd7 34.Kh2 Qb7 35.f5 Rd4 36.Qe3 Ra4 37.Re8 Ra2 38.Kh3 Qh1 39.Kg4 Ra4 40.Kh5 g6 41.fg6 Rd4 42.Qe7 1–0. Tumurbator,Purev – Falcon,Raymond, Nice, 1974.

4.Nf3 Nf6 =.

3.Bb2 b6

4.c4 Bb7 5.e3 e5 6.Be5 d6 7.Bb2 Nd7 8.Nf3 Be7 9.Bg7 Bf6 10.Bh8 Bh8 11.d4 cd4 12.Nd4 Nc5 13.Nd2 Ne7 14.N2f3 Qc7 15.Be2 0–0–0 16.0–0 Rg8 17.Qc2 Be4 18.Qd1 f5 19.g3 Qd7 20.Nd2 Ng6 21.Ne4 fe4 22.Bg4 1–0. barborski – cigorin (1705), kurnik, 2012.

4.c4 Bb7 5.Nf3 e6 6.e3 Nf6 7.Be2 d5 8.0–0 Nbd7 9.d4 Bd6 10.Nbd2 Qc7 11.Rc1 0–0 12.h3 Rac8 13.Qb3 Qb8 14.a4 Rfd8 15.Rfe1 cd4 16.Nd4 Nc5 17.Ba1 Nb3 0–1. tadziczek – mansur4, kurnik, 2012.

4.e3 Bb7 (--> 2.b5 b6 3.e3 Bb7 4.Bb2 c5).

4.e3 d5 5.Nf3 e6 6.c4 Nf6 7.Nc3 Bd6 8.d4 Nbd7 9.h4 0–0 10.Bd3 Bb7 11.Qe2 dc4 12.Bc4 cd4 13.Nd4 Rc8 14.g4 Bh1 15.0–0–0 Bd5 16.Nc6 Bc4 17.Qc4 Ne5 18.Nd8 1–0. lendzior (1730) – mansur4 (1705), playok.com, 2012.

4.e4 Bb7 5.d3 (5.e5 d6=) 5...d5 (5...e6 6.Nf3=) 6.e5 (6.ed5 Qd5 7.Na3 e6=) 6...e6 7.f4 (7.d4 Nh6=) 7...d4+= 8.Nf3 Ne7 9.Nbd2 (9.c4 Nf5+=) 9...Nd5–/+ 10.g3 (10.Nc4 Nf4 11.g3 Nd5–/+) 10...Ne3 (10...a4 11.Ne4–/+) 11.Qc1 (11.Qb1 Nd7–/+) 11...a4 12.Be2? (12.Qb1–/+) 12...Bd5?? (better is 12...a3–+) 13.c4+= dc3 (13...Bb7 14.a3+=) 14.Qc3 Nf5–/+ 15.0–0 h5 16.Nc4= g6 17.Rad1 Bh6 18.d4+= Nd7 19.dc5+/– Nc5 20.Nd6 Nd6 21.ed6 Bg7?? (better is 21...Rh7 22.Rd5 ed5 23.Qe5 Kf8 24.Qd5 Ra7+/–) 1–0. Kot,Jerzy (2270) – Fiedler,Wolfgang (1770), 14sen.Brandenburg op, 2005.

4.Nf3 Bb7 5.e3 d6 6.Be2 e5 7.d3 g5 8.0–0 g4 9.Nfd2 h5 10.f3 f5 11.e4 Bh6 12.ef5 Be3 13.Kh1 g3 14.hg3 h4 15.g4 h3 16.Ne4 Be4 17.g3 Bb7 18.Kh2 Qg5 19.f4 ef4 20.Bh8 fg3 21.Kg3 Nd7 22.Bb2 Ngf6 23.Nc3 0–0–0 24.Ne4 Be4 25.de4 Ne4 26.Kh3 Ne5 27.Kg2 Qh4 28.Qe1 Bf2 29.Qf2 Nf2 30.Be5 de5 31.Rf2 Rd2 32.Rh1 Qg5 33.Rh8 Kc7 34.Rh7 Kd6 35.Rb7 e4 36.Rb6 Kd5 37.c4 Kd4 38.Rd6 Kc3 39.Rd2 Kd2 40.Kg1 Ke1 41.Rg2 Qe3 42.Kh1 Qh3 43.Rh2 Qg3 44.a4 Qf4 45.b6 e3 46.Rg2 Qh6 47.Kg1 Qb6 48.Bf3 Qh6 49.Re2 Kd1 50.Rh2 Ke1 51.Rh6 e2 52.Re6 Kd2 53.Be2 Ke1 54.f6 Kd2 55.Rd6 Ke3 56.f7 Kf4 57.f8Q Kg3 58.Qf2 Kh3 59.Rh6# 1–0. guest506 – guest1917, ICC, 2002.

4.Nf3 Bb7 5.e3 Nf6 6.Be2 d6 7.0–0 g6 8.c4 Bg7 9.Nc3 0–0 10.d4 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6 5.d4 Bg7 6.Nf3 0–0 7.c4 c5 8.Nc3 b6 9.Be2 Bb7 10.0–0).

4.Nf3 Nf6 5.g3 e6 6.Bg2 Bb7 7.0–0 Be7 8.d3 0–0 9.Nbd2 d5 10.Re1 (10.c4 d4=; 10.Ne5=) 10...Nbd7 (10...a4 11.c4=) 11.e4 (11.c4 a4=) 11...de4 (11...a4 12.c4=) 12.de4 Qc7 13.Qe2 (13.e5 Ng4=) 13...c4 (13...a4 14.e5 Ng4 15.Rad1=) 14.Nc4 (14.Qc4 Qc4 15.Nc4 Be4= (worse is 15...Ne4 16.Nfe5 Ne5 17.Be5+–)) 14...Be4 15.Nd4 Bg2 16.Kg2 Bb4 17.Red1 a4 (17...Bc5 18.Nc6=) 18.Nc6+= Bc5 19.Rd3 Nd5 20.Rad1 a3 (20...Rfc8 21.a3+=) 21.Ba1 Rfe8 22.Qf3 Ra4 23.Rd5 ed5+= 24.Qd5 Nf6 25.Bf6 gf6 26.Qd3 Qc8 27.Qb3 Qg4 28.Nd6 Bd6 29.Rd6 Qe4 30.Kg1 Kg7 31.Rd7= Rc4 32.Nd8 Rd8! 33.Rd8 Rb4 34.Re8= Rb3 35.Re4 Rb2 36.Ra4 Ra2 37.c3 Kg6 38.Kf1 Kf5 39.Ra6 Ra1 40.Ke2 a2 41.Kd2?? Rf1–+ 42.Ke2 a1Q 43.Kd2 0–1. Jethan,Martin (2065) – Vonthron,Horst (2310), 15th Open A, Vienna AUT, 2006.

3.Bb2 d6

4.e3 Nd7 5.Nf3 e6 6.a4 Ngf6 7.Be2 Be7 8.0–0 0–0 9.c4 Qc7 10.d4 cd4 11.ed4 Re8 12.Nbd2 Bf8 13.Rc1 e5 14.c5 e4 15.Ng5 h6 16.cd6 Qd6 17.Nc4 Qb8 18.Nh3 Nd5 19.Ne3 N7f6 20.Nd5 Nd5 21.Bc4 Nb6 22.Bb3 (22.Qh5 Nc4 23.Rc4 Qd6=) 22...Bh3 23.gh3 Qf4 24.Rc3 (24.Qg4!? Bd6 25.Qf4 Bf4 26.Rc2=) 24...Bd6+= 25.Rg3 Qf6 26.Rg2 Nd7 (26...Rac8!?–/+) 27.Kh1 Nf8 28.Rfg1 g6 29.Qh5 (29.Bd5!? Rab8 30.Qg4+=) 29...Kh7= 30.Qd5 Re7 31.h4 Qe6 32.h5 g5 33.Rg5?? (better is 33.Qe6 Ne6 34.Be6 fe6 35.h4+=) 33...hg5–+ 34.Qg5 f6 35.Qe3 (35.Qg6 Ng6 36.hg6 Kg7 37.Be6–+) 35...Qf5 36.Bg8 Kh8 37.d5 Qd7 (better is 37...Bf4 38.Qc5 Rc7–+) 38.Bh7 Kh7 (38...Kh7 39.Bf6 Qf5 40.Be7 Be7–+) 0–1. Lorenc,Tomas (2105) – Mojzis,Jaroslav (2185), Tabor op, 2008.

4.e3 e5 5.c4 Be7 6.d4 Qc7 7.Nf3 Bg4 8.Be2 Nf6 9.de5 Bf3 10.ed6 (10.gf3?! de5 11.Nc3 0–0=; worse is 10.Bf3 de5 11.Nc3 Nbd7+=; 10.ef6?! Bf6 11.Bf6 Be2 12.Qe2 gf6+–) 10...Bd6 11.Bf6?? (better is 11.Bf3 Be5 12.b6+/–) 11...Be2–+ 12.Qe2 gf6 13.Nd2 Nd7 14.Rd1 Be5 15.f4 Bc3 16.0–0 0–0–0?? (better is 16...Bd2 17.Rd2 0–0–0–/+) 17.Ne4+/– Bb4 18.Ra1?? (better is 18.Nd6 Kb8 19.Nf7+/–) 18...f5 19.Ng5 Nf6 20.a3 Rd2 21.Qf3 Bc3 22.Rac1 Rd3 23.Rfd1 Qd7 (better is 23...Bd2 24.Ra1 Re8–+) 24.Rd3 Qd3 25.Nf7 Re8 26.Ne5 Qd2 (better is 26...Be5 27.fe5 Re5–+) 27.Rd1 Qb2 28.Nf7 Ne4 29.Nd6? (better is 29.Nh6–/+) 29...Nd6–+ 30.Rd6 Qc1 31.Kf2?? Qe1 0–1. elsh1403 – bruziewicz (1720), kurnik, 2011.

3.Bb2 e6

4.e3 b6 5.Nf3 Bb7 6.Be2+= Nf6 7.0–0 d6 8.c4 Be7 9.Nc3 Nbd7 10.d4 Qc7 11.d5+= e5 12.Nd2 0–0–0 13.f4 h5 14.h3 Rdf8 15.Nf3 Ne8 16.fe5 Ne5 17.Ne5 de5 18.Bh5 g6 19.Bf3 Nd6 20.Qd3 f5 21.e4 Rh4 22.Rae1 Bf6 23.Nb1 g5+= 24.Nd2 g4 25.hg4 fg4 26.g3?? gf3–+ 27.Rf3 Rh3 28.Ref1 Qe7–+ 29.Qe2 Rfh8 30.Qg2 Qh7 (31.Rf6 Rh2 32.Rd6 Rg2 33.Kg2 Qh2 34.Kf3 Qd2 35.Be5 Qd3 36.Kf2 Rh5 37.Rb6 Re5–+; better is 30...Bg5!? 31.R1f2–+) 0–1. Kirylo,Tadeusz – Jablonski,R, corr ch Poland, 1993.

4.e3 d5 5.Nf3 =.

4.e3 Nf6 5.Nf3 d6 6.d4 Nbd7 7.c4 cd4 8.ed4 Be7 9.Bd3 b6 10.Nbd2 Bb7 11.Rc1 Rc8 12.0–0 0–0 13.Re1 Re8 14.Bb1 (14.Ba3 d5 15.Be7 Qe7=) 14...Rc7 15.h3 Qa8 16.Qc2 Rec8 17.Qd3 Nf8 18.Ba3 Ng6 19.Qe3 Bf8 (19...Bf3!? 20.gf3 d5=) 20.Bd3 Qa7 21.Rc2 Ba8 22.Rec1 Qb7 23.Bf1 (23.Bb2 Be7+=) 23...Nd5= 24.Qe4 Nb4 25.Qb7 Bb7 26.Bb4 ab4 27.Ne1 Ne7 28.Nd3 Nf5 29.Nb3 Be4 30.g4 Nh4 31.Nd2 Bg6 32.Kh2 d5 33.Kg3 Be7 34.c5+= h5 35.c6 Bh7 36.f4 g5 37.Nf3 Nf3= 38.Kf3 Be4 39.Ke3 hg4 40.hg4 Ra7 41.Bg2?? gf4–+ 42.Nf4 Ra3 43.Kd2? Bg5 (43...Bg5 44.Be4 Bf4 45.Kd1 Bc1 46.Bd5 Be3–+) 0–1. Emberger,Rene (2115) – Mazi,Leon (2390), Feffernitz Raika op, 2004.

4.e4 d5 =.

3.Bb2 Nf6

4.c4 b6 5.Nf3 (5.e3 e6=) 5...Bb7 (5...e6 6.g3=) 6.g3 Bf3 7.ef3 g6 (7...e6!?=) 8.Bf6+/– ef6 9.Nc3 d6 (9...Bh6 10.Qe2 Kf8 11.0–0–0+/–) 10.Bg2 Qe7 (10...Bg7 11.Qe2 Kf8 12.0–0+/–) 11.Kf1 Ra7 12.Qc2 (12.Nd5 Qd8+/–) 12...Kd8 (12...Qd8!?+/–) 13.Nd5 ½–½. Sleisz,Tamas – Berta,Krisztian, Magyar Egyetemi Sakk, 1995. (Known even as: Monori,Zoltan (2285) – Dupsky,Laszlo (2245), HUN Egyetemi op, 1995).

4.c4 e6 5.Nf3 =.

4.e3 g6 5.c4 Bg7 6.d4 d6 7.Nf3 0–0 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6 5.d4 Bg7 6.Nf3 0–0 7.c4 c5).

3.c4 a4

4.a3 b6 5.e3 Bb7 6.Nf3 e6 7.Nc3 d5 8.Na4 Nf6 9.Nc3 Be7 10.Bb2 0–0 11.Be2 Nbd7 12.0–0 Qc7 13.d4 Rad8 14.Qb3 cd4 15.ed4 dc4 16.Bc4 e5 17.Ne5 Ne5 18.de5 Qe5 19.Nd5 Qd6 20.Ne7 Qe7 21.Rae1 Qd6 22.Rd1 Qc7 23.Bf6 gf6 24.Rfe1 Kh8 25.g3 Qc5 26.Rd8 Rd8 27.Bf7 Rd2 28.Qe3 Qe3 29.fe3 Rg2 30.Kf1 Rh2 31.e4 Rb2 32.Bc4 Kg7 33.Re2 Rb1 34.Kf2 Ra1 35.Re3 Kg6 36.Kf3 h6 37.Kf4 Rc1 38.Bb3 Rf1 39.Rf3 Re1 40.Re3 Rf1 41.Kg4 h5 42.Kh3 Rf2 43.a4 Kg5 44.Bd5 Bc8 45.g4 hg4 46.Kg3 Rb2 47.Rc3 Bd7 48.Rc7 Be8 49.Rg7 Kh6 50.Rg4 Rb4 51.e5 Rg4 52.Kg4 fe5 53.Kf5 Kg7 54.Ke5 Kf8 55.Kd6 1–0. barborski – senilis, kurnik, 2012.

4.a3 d5 5.d3 dc4 6.dc4 Qd1 7.Kd1 e5 8.f4 Bd6 9.Bb2 Nd7 10.fe5 Ne5 11.Nf3 f6 (11...Nc4? 12.Bg7 Ne3 13.Kc1+–) 12.Ne5 fe5 13.g3 Nf6 14.Bg2 0–0 15.Nd2 Ng4 16.Ke1 Rb8 (16...Ne3 17.Bd5 Nd5 18.cd5=) 17.Ne4 Bc7 18.Bh3 (18.Rc1 b6=) 18...Be6 (18...Bf5!? 19.Nd2 Ne3 20.Bf5 Rf5–/+) 19.Bg4 (19.Nc5? Ba5 20.Kd1 Nf2 21.Kc1 Bh3–+) 19...Bg4 20.Nc5 Rbd8?? (better is 20...Ba5!? 21.Kd1 Rf2–+) 21.Nb7 Ra8? (21...Rb8 22.Nc5 Ba5 23.Kd1 Rfd8 24.Kc2+=) 22.Nc5 (better is 22.c5 Rab8 23.Nd6 Bd6 24.cd6 Rb5 25.Bc3=) 22...Ba5+= 23.Kd1 Rad8 24.Kc2 Be2 25.Be5 (better is 25.Bc3 Rc8 26.Ba5 Rc5 27.Bb4 Rc4 28.Kd2 Rb4 29.ab4 Bb5 30.Rhc1 Rd8 31.Ke3+=) 25...Rf2 26.Rac1?? (26.Kc1 Bf3 27.Rg1–+) 26...Bf3 (26...Bd3! 27.Kd1 Bc2) 27.Kb1= Bh1 28.Rh1 Rc8 29.Ne4 (worse is 29.Na4 Rf5 30.Bg7 Kg7+=) 29...Re2 30.Nd6 Rf8 31.Bf4 Rf6 (31...Bb6 32.Rd1 Bc5 33.h3+=) 32.c5 Bc7? (32...g5 33.Bg5 Rf3=) 33.Ne8?? (better is 33.b6 Bd6 34.cd6+– (34.Bd6?! Rf3=)) 33...Re8 34.Bc7 Rf2 35.b6 Re3 36.Ka1 Ra3 37.Kb1 Rb3 38.Kc1?? (better is 38.Ka1+=) 38...a3–+ 0–1. Valpa – Idris, playchess.de, 2004.

4.Nc3 e6 +=.

4.d4 cd4 5.Qd4 d6 6.e4 =.

4.d4 e5 5.d5 (5.de5 d6 6.Bb2 f6 7.ef6 Nf6+/–) 5...a3 (5...Nf6=) 6.Na3 (6.e4 Nf6+/–) 6...e4 (6...Ra3 7.Ba3 Qa5 8.Qd2 Qa3 9.e4+=) 7.g3 (7.Qd2 Nf6+=) 7...d6 (7...Ra3!? 8.Ba3 Qa5 9.Qd2 Qa3–/+) 8.Bg2 (8.Qd2 Be7+=) 8...Bf5 (8...Qf6 9.Nc2 Qc3 10.Bd2 Qc4 11.Ne3=) 9.e3 (better is 9.Nc2!?+/–) 9...Ra3+= 10.Ba3 Qa5 A double attack 11.Qd2 (11.Kf1 Qa3 12.g4 Bd7+=) 11...Qa3–/+ 12.Ne2 Qa4 13.Rc1 (13.Nc3 Qc4 14.Rb1=) 13...g5 (13...Nd7!?–/+) 14.0–0 (14.Qb2 Qa5 15.Kf1+=) 14...g4 (better is 14...Bg7!?=) 15.Nc3 (15.Qb2 f6 16.Nc3 Qb4 17.Qb4 cb4 18.Be4 Be4 19.Ne4 Nd7+/–) 15...Qc4 16.a4 (16.Ne4 Qa4 17.Qc3 Be4 18.Qh8 Ne7+=) 16...h5 (16...Nf6 17.Ne4 Ne4 18.Qb2+= (18.Rc4?? Nd2 19.Rf4 Nf1–+)) 17.a5 (better is 17.Ne4 Qb3 18.Rb1+/–) 17...Bg7?? (better is 17...Nd7+=) 18.Rb1?? (better is 18.Ne4 Qe4 19.Be4 Be4 20.Qa2+–) 18...Bc3–+ (worse is 18...Qc3 19.Qa2 Bc8 20.Qa4–+) 19.Rfc1 (19.Qc2 Qd3 20.Qa4–+) 19...Bd2 20.Rc4 White gets in control 20...Nd7 (20...Ba5 21.Be4 Bd7 22.Ra4–+) 21.Be4 Ne5 22.Ra4 (22.a6 Nf6 23.Bf5 Nc4 24.ab7–+) 22...c4 (better is 22...Be4 23.Re4 Ba5–+) 23.a6? (better is 23.Bf5 Ne7 24.a6 Nf5 25.e4–/+) 23...Nf3?? (better is 23...Be4 24.a7 Nf3 25.Kg2 Ke7–+ (25...Bb1?! 26.a8Q Ke7 27.Rc4–/+)) 24.Bf3+= ba6? (better is 24...Nf6 25.ab7 0–0=) 25.ba6+– Be3 (25...Bb1 26.a7 Kf8 27.a8Q Kg7 28.Rc4+–) 26.Rb7 (26.Rb8 Ke7 27.fe3 Nh6 28.Rh8 gf3 29.Rh6 Be4+–) 26...Bc8?? (26...Bc5 27.a7 Ba7 28.Raa7 Bc8+–) 27.Rb8 (27.fe3 Nf6 28.Rb8 0–0+–) 27...Kd7 (27...Bc5 28.Rc8 Ke7 29.a7 Ba7 30.Ra7 Kf6 31.Be4+–) 28.a7 (better is 28.fe3 Ba6 29.Ra6+–) 28...Ba7 29.Be4?? (better is 29.Ra7 Kd8 30.Be2+–) 29...Kc7 (better is 29...Bb8 30.Bf5 Kd8 31.Bc8 Kc8 32.Rc4 Kd7–+) 30.Rb1?? (better is 30.Rc8 Kc8 31.Ra7=) 30...Nf6?? (better is 30...Bc5–+) 31.Ra7+– Kd8 32.Bh1 (32.f3!? Re8+/–) 32...Nd7+/– 33.Be4 (33.f4+/–) 33...Ke7?? (33...Nf6 34.f3 Re8 35.Rb6 Ne4 36.fe4+–) 34.Re1 (better is 34.Rc1 Kf6 35.Rc4+–) 34...Kf6+= 35.Rc1 Ne5 36.Kg2 (36.Ra8 Re8=) 36...h4 37.Ra5 (37.Ra8 h3 38.Kf1 Re8=) 37...hg3 (better is 37...Bf5!? 38.Bf5 h3 39.Kf1 Kf5–/+) 38.fg3= Rh3 39.Rb5 Nd3?? (39...Kg5 40.Rb8 Bd7 41.Rg8 Kf6 42.Rf1 Ke7 43.Rb8=) 40.Rf1 (better is 40.Bd3 cd3 41.Rc8+–) 40...Ke5+= 41.Bd3 cd3 42.Rd1 (better is 42.Rf7!? Bf5 43.Rb2+=) 42...Bf5–/+ 43.Kg1 Be4 44.Kf2?? (better is 44.Ra1–/+) 44...Rh2–+ 45.Ke1 Re2 46.Kf1 Re3 (better is 46...Bg2 47.Kg1 d2 48.Rbb1–+) 47.Kf2 Rf3 48.Kg2 Re3 (better is 48...d2 49.Rb4 Rd3 50.Kf2 Bf3–+ (50...Rd5?! 51.Rb2–+; 50...Kd5?! 51.Rb2 Rf3 52.Ke2–+)) 49.Kf2+= Re2 (better is 49...Bf3 50.Ke3 Bd1 51.Kd3 Bf3+=) 50.Kf1–+ Re3 (better is 50...Bg2 51.Kg1 d2–+ (51...Bd5? 52.Rd3 Rg2 53.Kf1+–)) 51.Kf2= ½–½. theeagle (1740) – wonderhorse, net–chess.com, 2007.

4.e4 d6 5.Nc3 =.

4.e4 e6 5.Nf3 (5.Nc3 d5 6.ed5 Nf6+=) 5...d5= 6.ed5 ed5 7.d4 (7.cd5 Ne7=) 7...dc4 (7...Nf6!?=) 8.Bc4+= b6 (8...cd4 9.0–0 Bb4+/–) 9.Bf7?? (9.Qe2 Be7 10.Ne5 Qd4 11.Bb2+– (11.Bf7?! Kf8 12.Bb2 Qb4 13.Bc3 Qf4+/–)) 9...Kf7= 10.Ne5 Ke8 11.Qf3 (better is 11.Qh5!? g6 12.Ng6 hg6 A) worse is 13.Qh8 Kf7 (13...Qd4 14.Qg8 Qe4 15.Be3+=) 14.Qe5 Qd4 15.Qd4 cd4–/+; B) 13.Qg6 Kd7 14.Qf5 Ke8 15.Qg6 Kd7 16.Qf5 Ke8 17.Qg6=) 11...Ra7–/+ 12.0–0? (better is 12.Qh5 g6 13.Ng6 hg6 14.Qh8 Qd4 15.Qd4 cd4 16.Kd1–/+) 12...Qd4–+ (12...cd4?! 13.Qh5 g6 14.Ng6 hg6 15.Qh8+=) 13.Re1 Be6 (13...Re7 14.Nc3 Bb7 15.Qb7 Rb7 16.Nc6 Kf7 17.Nd4 cd4 18.Na4–+) 14.Qh5? (better is 14.Nc3!? Ne7 15.Bf4–/+) 14...g6–+ 15.Ng6 Qa1?? (15...hg6 16.Qg6 Theme: Double Attack) 16.Nh8 (better is 16.Re6 Kd8 17.Nh8+–) 16...Ke7?? (better is 16...Kd7 17.Rd1 Bd6 18.Qh7 Ne7+/–) 17.Qf7+– Kd8 18.Qf8 Kd7 19.Rd1 (19.Qb8 Rc7 20.Bf4 Qf6 21.Qc7 Ke8 22.Qc8 Qd8 23.Qe6 Ne7 24.Qg8 Kd7 25.Rd1 Nd5 26.Qd5 Ke8 27.Qd8) 19...Kc7 20.Bf4 Kb7 (20...Qe5 21.Be5 Kb7 22.Qb8) 21.Qb8 1–0. Martin – Fowler, North Carolina, 1984.

3.c4 b6

4.Bb2 d6 5.e3 e5 6.d4 ed4 7.ed4 Be7 (7...Qe7 8.Be2 Be6+/–) 8.dc5+/– dc5 9.Qd8 Bd8 10.Bg7 Bf6 11.Bh8?? (better is 11.Bf6 Nf6 12.Nc3+/–) 11...Bh8–+ 12.Nc3?? (better is 12.Bd3 f5 13.Ne2 Ba1 14.Nbc3 Bc3 15.Nc3–+) 12...Be6 (better is 12...Bc3 13.Kd1 Ba1–+) 13.Nd5?? (13.Rc1 Nd7+–) 13...Ba1?? (better is 13...Bd5 14.0–0–0 Bb7+=) 14.Nc7+– Kd7? (14...Kd8 15.Na8 Nd7+–) 15.Na8 Bc3 16.Kd1 Bd4 17.f3 (17.Bd3 Ne7 18.f4 Kc8 19.Nb6 Kc7+–) 17...Bf5 (17...Ne7+–) 18.Nb6 Kd6 19.Ne2 Be3 (19...Bg7 20.Nf4+–) 20.Nd5 Bd4 21.Nd4 cd4 22.Kd2 Nd7 23.Bd3 Bd3 (23...Be6 24.Nf4 Ngf6 25.Re1+–) 24.Kd3 Kc5 25.Re1 f6 26.Re8 Ne5 27.Ke4 d3 (27...Kc4 28.Rg8 Nd7 29.Nc7+–) 28.Rc8 Kd6 29.Nc3 (better is 29.Rg8 d2 30.Rd8 Kc5 31.Rc8 Kd6+–) 29...Ne7 30.Ra8 (better is 30.c5 Ke6 31.Ra8 d2 32.Ra6 Kf7+–) 30...Kc5 31.Ke3 (31.Ra5?! Kb4 32.f4 N5g6 33.Kd3 Ka5+–) 31...Kc4 (31...Nf5 32.Kd2 Nd6 33.Ne4 Ne4 34.fe4 Nc4 35.Kd3 Ne5 36.Kc3 Kb5 37.Rh8+–) 32.Kd2 Nf5 (32...Kd4 33.Rd8 Kc5 34.a4+–) 33.b6 (worse is 33.Ra5 Kd4 34.Ra4 Nc4 35.Rc4 Kc4+–) 33...Nd6 34.Ra5 Kd4 (34...Kb4 35.Ra4 Kc5 36.Ne4 Ne4 37.Re4 Kb6+–) 35.Ra7 (better is 35.Rd5 Kc4 36.Rd6+–) 35...Nec4+= 36.Kd1 Kc3 37.b7?? (better is 37.Rc7–/+) 37...Nb2–+ 38.Ke1 d2 39.Kf2 Nb7! (39...Nb7 40.Rb7 d1Q 41.Rc7 Kd2–+) 0–1. Valpa – Idris, playchess.de, 2004.

4.Bb2 Nf6 5.e3 Bb7 6.Nf3 d5 7.Be2 Nbd7 8.0–0 Qc7 9.Nc3 h5 (9...dc4 10.Bc4 e6 11.Ng5=) 10.Ng5 (10.cd5 Nd5 11.Nd5 Bd5+=) 10...d4= 11.Nd5 Bd5 (better is 11...Nd5!? 12.cd5 Bd5 13.ed4 Qf4=) 12.cd5+= Ng4 13.f4 de3 14.Bg4 hg4 15.de3 Nf6 16.e4 0–0–0?? (better is 16...c4+/–) 17.Nf7+– Rh7 18.Nd8 Qd8 19.Bf6 gf6 20.Qg4 Kb7 21.Qg8 Rg7 22.Qe6 Rh7 23.Rf3 Bh6 24.Raf1 Qh8 (24...Kb8 25.Rd3+–) 25.Rh3 (better is 25.Qc6 Ka7 26.Qc7 Ka8 27.Qb6 Qb8 28.Qa5 Kb7+–) 25...Bf4 (25...Qd8+–) 26.Rf4 Rh3 27.Qh3 (27.Qh3 Qh3 28.gh3+–) 1–0. Kuehnemund,Lutz (1920) – Wirp,Hans Werner (1705), Berlin Lichtenberger op 7th, 2008.

4.Bb2 Nf6 5.e3 e6 6.Nc3 Bb7 7.Nf3 d6 8.Be2 Nbd7 9.0–0 Qc7 10.d4 Be7 11.d5 e5 12.e4 0–0 13.Bc1 Kh8 14.h3 Ng8 15.g4 Rae8 16.a4 Qd8 17.Ra3 g6 18.Nh2 Kg7 19.f4 f6 (19...ef4 20.Bf4 Ne5 21.Nf3=) 20.f5+/– g5 21.Kg2 Nh6 22.Rh1 Nf7 23.Qe1 Rh8 24.Bd1 Reg8 25.Ne2 h6 26.Ng3 Bc8 27.Nf3 Qc7 28.h4 Kf8 29.hg5 hg5 30.Nh5 Rh7 (30...Ke8 31.Nd2+=) 31.Nd2 (31.Nf4 gf4 32.Rh7 Ke8+/–) 31...Rgh8+= 32.Rah3 Kg8 33.R1h2 Qd8 34.Qh1 Qf8 35.Nf3 Bd8 36.Nd2 Be7 37.Nb3 Bd8 (37...Nh6 38.Kf2+=) 38.Bd2 Bc7 39.Qe1 Qd8 40.Bc2 Bb7 41.Be3 Qa8 42.Nd2 Qf8 43.Nf3 Bd8 44.Qc1 (44.Kf1 Nh6 45.Qg3 Kf7+/–) 44...Qe7 (44...Nh6!? 45.Kg3 Qe8+=) 45.Bd1 Bc8 46.Be2 Bb7 ½–½. Mallmann,Bernd (1885) – Schiff,Armin (2160), Saarlouis op 7th, 2004.

4.Nc3 Bb7 5.d4 e6 6.Na4 Be7 7.dc5 bc5 8.Nf3 Nf6 9.e3 d5 10.Bb2 Nbd7 11.Bd3 Nb6 12.Nb6 Qb6 13.0–0 0–0 14.Qc2 dc4 15.Bc4 Bd5 16.Ng5 Rfe8 17.Bf6 Bf6 18.Qh7 Kf8 19.Bd5 ed5 20.Qh5 g6 21.Qh7 Ra7 22.Rab1 Re5 23.Qh6 Bg7 24.Qh4 Ke8 25.Rfd1 Bf6 26.f4 Re3 27.Rd5 c4 28.Qf2 Rae7 29.Nf3 R7e4 30.Kh1 c3 31.Rd3 Re6 32.Re3 Qe3 33.Qe3 Re3 34.b6 Kd7 35.b7 Re8 36.Kg1 ½–½. Pcmvr – Markjburden, playchess.de, 2005.

4.Nc3 Bb7 5.e4 e5 6.d3 d6 7.Be3 Nd7 8.f3 (8.Be2 Be7+=) 8...Be7= 9.Qd2 Nf8 10.Nge2 Ne6 11.g3 h6 (11...Nf6 12.Bh3=) 12.Bg2 Nf6 13.0–0–0 Qc7 14.h4 0–0–0 15.g4 g5 (15...Kb8 16.Kb1+=) 16.hg5 White gets the initiative 16...hg5 17.Bg5 Ng5 18.Qg5 Rh1 (18...Rhg8 19.Qf5 Kb8 20.Nd5 Nd5 21.cd5 Bg5 22.f4 ef4 A) 23.Nf4?? Bc8 24.Qh7 Bf4 25.Kc2 Be5–+ (worse is 25...Rg4 26.Bh3 Rgg8 27.Rdf1–+); B) 23.Bf3–/+) 19.Rh1 (worse is 19.Bh1 Rg8 20.Qf5 Kb8+=) 19...Rg8 20.Qf5 Kb8 21.Nd5 Nd5 22.ed5 Rg7 23.Rh8 Bc8 24.Qh5 Kb7 25.Ng3 (25.Ng3 Bg5 26.Kb2+/–) 1–0. De Visser,Arno – Schot,J, corr NL ch, 1989.

4.Nc3 Bb7 5.e4 e6 6.d3 (6.Nf3 d6+=) 6...Ne7 (6...d5 7.ed5 ed5 8.Qe2 Be7 9.Nd5 Bd5 10.cd5=) 7.Nf3+= d5 8.ed5 (8.Be2 g6+=) 8...ed5 9.Be2 (9.Qe2 d4 10.Ne4 f5+=) 9...dc4 (9...g6 10.0–0=) 10.0–0 (10.dc4 Qd1 11.Bd1 Nd7+=) 10...cd3= 11.Bd3 g6 12.Bg5 Bg7 (12...h6 13.Bf6 Rg8 14.Be4 Qd1 15.Rad1 Be4 16.Ne4+–) 13.Re1 Bc3 (better is 13...f6!? 14.Bf4 Ra7+=) 14.Re7 Qe7 15.Be7 Ke7 16.Rc1 (16.Qe2 Kf8 17.Rd1 Kg7+–) 16...Bf6+/– 17.Nd2 Nd7 (17...Rd8 18.Nc4 Bg5 19.Rc3+–) 18.Be4 (18.Nc4 Bd5 19.Bf5 Bd4 20.Bd7 Bc4 21.Rc4 Kd7 22.Rd4 cd4 23.Qd4 Kc7 24.Qe5 Kd7 25.Qd5 Ke7 26.Qb7 Ke6 27.Qb6 Kf5+–) 18...Be4 19.Ne4 Threatening mate... how? 19...Bd4 20.Qg4 (20.Qf3 Rae8+/–) 20...Rhd8 (20...f5 21.Qh4 Nf6 22.Ng5+/–) 21.Qh4 Nf6?? (better is 21...Kf8+/–) 22.Nf6+– Bf6 (22...h5 23.Nd5 Kf8 24.Qe7 Kg8 25.Nb6+–) 23.Re1 Kf8 24.Qf6 Kg8 25.Qb6 (25.h4 Rd4+–) 25...c4 26.Qe3 (26.Kf1 a4+–) 26...Rd3 (26...Rac8 27.b6+–) 27.Qc5 Rc3 (27...c3 28.Qc7+–) 28.b6 Rc2 (28...Rd3 29.Qc4 Rd6+–) 29.b7 Rb8 30.Qc8! Rc8 31.bc8Q (31.bc8N?! Ra2 32.Rc1 a4+/–; 31.bc8B?! Ra2 32.Rc1 a4+/–) 31...Kg7 32.Qb8 Ra2 33.Qe5 Kh6 34.Re3 f6 35.Qf4 Kg7 36.Re7 Kf8 37.Qf6 1–0. b4_player – opponent, gamecolony.com, 2007.

4.Nc3 Bb7 5.Nf3 d6 6.g3 Nf6 7.Bg2 Nbd7 8.0–0 Qc7 9.d3 e6 10.Bb2 Be7 11.e4 0–0–0 12.Ng5 Rdf8 13.f4 h6 14.Nf3 Rhg8 15.Qd2 g5 16.fg5 hg5 17.Ng5 Ne5 18.Ne2 Nfg4 19.Nh3 f5 20.Nc3 d5? (20...fe4 21.Ne4 d5 22.Neg5=) 21.Nf4 (21.ed5 Rh8 22.de6 Nf3 23.Rf3 Bf3 24.Rf1 Bg2 25.Qg2+– (25.Kg2?? Rh3 26.Kg1 Rh2 27.Qh2 Nh2 28.Kh2 Qe5–+)) 21...d4+/– 22.Nce2?? (better is 22.Ne6 dc3 23.Qc3+/–) 22...Bg5–/+ 23.Qe1 fe4 24.de4 (24.Be4? Be4 25.de4 Qh7–+ (worse is 25...Nc4 26.Bc1 Qh7 27.h4 Bh4 28.Rf3–+)) 24...Qd7 25.Bh3 Qh7 (25...Nc4?! 26.Bg4 Bf4 27.Rf4 Rf4 28.Be6 Qe6 29.Nf4–+) 26.Bg4?? (better is 26.Bc1–+) 26...Ng4 27.h4 (27.Rf2 Qe4 28.Rg2–+) 27...Qe4 (27...Qe4 28.Nd5 Rf1 29.Qf1 Be3 30.Qf2 Bf2 31.Kf1 Bd5 32.cd5 Qf3 33.Nd4 Ne3#) 0–1. Valenta,Vit jr (2170) – Kratochvil,Jo (2230), Kouty nad Desnou CZE, Men Ch, 2012.

4.Nc3 Bb7 5.Nf3 Nf6 6.g3 (6.d4 Qc7+=) 6...g6 (6...d5 7.cd5 Nd5 8.Bb2=) 7.Bg2 Bg7 8.0–0 0–0 9.Qb3 (9.Bb2 d5+=) 9...e6 (9...d5 10.cd5 Nd5 11.Bb2=) 10.d4 (10.Rd1 d5=) 10...cd4 11.Nd4 Bg2 12.Kg2 Qc7 13.Bg5 (13.Rd1 d6=) 13...Qb7 (13...Rc8 14.Rfd1+=) 14.f3= d6 15.Rad1 Nbd7 (15...Rc8!?=) 16.Nc6+= Nc5 17.Qc2 d5 (better is 17...Qc7!?+=) 18.cd5 ed5 (18...Nd5!? 19.Nd5 ed5 20.Rd5 Rac8+/–) 19.Bf6+– Bf6 20.Nd5 Bg7 21.e4 Rfe8 22.Rc1 Rac8? (22...Ne6+–) 23.Nb6! Qb6 24.Qc5 Qc7 (24...Qc5 25.Rc5 Rc7+–) 25.b6 Qd7 (25...Bf8 26.bc7 Bc5 27.Rc5 Rc7 28.a4+–) 26.Ne7! (26.Ne7 Qe7 27.Qe7 Re7 28.Rc8 Bf8 29.Rb8+–) 1–0. pierre – ztsx, internet, 2009.

4.Nc3 g6 5.Bb2 Bg7 6.e3 Bb7 7.d4 d6 8.dc5 dc5 9.Qd8 Kd8 10.Rd1 Nd7 11.Nf3 e6 12.Be2 Ngf6 13.Na4 Kc7 14.Rd7! Kd7 (14...Nd7 15.Bg7) 15.Nb6 Kc7 16.Na8 Ra8 17.Ng5 Bg2 18.Rg1 Bb7 19.Nf7 Kb6 20.a4 Re8 21.f4 (21.f4 Re7 22.Nd6+/–) 1–0. Woschkat,Karl_Heinz – Helduser,Matthias, DESC, 1999.

4.d4 e6 5.Ba3 d5 6.Qd3 (6.e3 Nf6=) 6...dc4=+ 7.Qc4 Nd7 8.d5 (8.e4!?=+) 8...Qf6–/+ 9.Nc3 (9.de6!? Qa1 10.ed7 Kd7 11.Qf7 Ne7 12.Qb3–/+) 9...ed5–+ 10.Qb3 c4 11.Qc2?? (better is 11.Qb2 d4 12.Nd5–+) 11...Ba3 12.e4 (12.Rb1 Bb4 13.Rb4 ab4 14.Nd5 Qa1 15.Qd1 Ra2–+) 12...Bb4 13.f3 (13.0–0–0 Bc3 14.ed5–+) 13...Bc3 14.Ke2 Ba1 15.Ke3 Qd4 16.Ke2 Nc5 17.Qd2 Nd3 18.Kd1 Bc3 19.Kc2 Bd2 (19...Nb4 20.Kb1 Qd2 21.Bc4 Qc2) 20.Kd2 Qb2 21.Ke3 (21.Kd1 Qc1 22.Ke2 Qe1) 21…Qf2 (21...d4) 0–1. boldeagle – PassedPawn, ChessWorld.net, 2005.

4.e3 a4 5.a3 d5 6.Nf3 dc4 7.Bc4 e6 8.0–0 Bd6 9.Bb2 f6 (9...Nf6!?+=) 10.Nc3+/– Ne7 11.Na4 Bb7 12.Nc3 (12.Be6?! Bf3 13.gf3 Bh2 14.Kg2 Bc7+=) 12...Nf5? (better is 12...Bd5 13.Qb3 Qd7+/–) 13.Be6+– Qc7?? (13...Ne7 14.d4+–) 14.Nd5 (better is 14.Bf5 Nd7+–) 14...Qd8 (14...Bd5 15.Bd5 (15.Bf5?! Bc4+–) 15...Ra5 16.Bc3+–) 15.e4 (15.Nf6!? gf6 16.Bf5 Rg8+–) 15...Ne7 16.Ne7 Be7 17.d3 Qd6 18.Bc4 Bd8 (18...Nd7 19.Re1+–) 19.g3 (19.e5 fe5 20.Be5 Qg6+–) 19...Bc7 (19...Nd7 20.Re1 Be7 21.e5 fe5 22.Ne5 Ne5 23.Re5+–) 20.Nh4 (20.e5 Qf8+–) 20...Nd7 (20...Qf8 21.f4+–) 21.Nf5 (better is 21.Qh5!? Kd8 22.Ng6 Re8 23.Qh7 Kc8+–) 21...Qf8 22.Qg4 Be5?? (22...g6 23.Ne3 Ne5+–) 23.Be5 (23.Ng7 Ke7 24.Be5 fe5+–) 23...fe5 (23...Ne5 24.Ng7 Kd8 25.Ne6 Ke7 26.Qe2+– (26.Nf8?! Ng4 27.Ne6 Ne5+–)) 24.Qg7 (better is 24.Ng7!? Ke7 25.f4 h5 26.Qg5 Qf6 27.Nf5 Kd8 28.Qf6 Nf6+–) 24...Qg7 25.Ng7 Ke7 26.Nf5 Kf6 27.f4 ef4 28.Rf4 Kg5 (28...Ke5+–) 29.Nd6 Nf6 (29...Rhb8 30.Rf7 Bc8 31.Nc8 Rc8 32.Rd7+–) 30.Nb7 Ng4 (30...Rhf8 31.Nd6 Kg6 32.Raf1+–) 31.Rf5 (better is 31.h4 Kh6 32.Rg4 Rhf8+–) 31...Kg6 32.Nd6 (32.Raf1 Rhb8 33.R1f4 h5 34.Bf7 Kh7 35.Rh5 Nh6 36.Rg4 Rg8 37.Bg8 Rg8 38.Rg8 Kg8 39.Rh6 Kf7 40.Rb6 c4 41.dc4 Ke7 42.e5 Ke8 43.Rf6 Kd7 44.Nc5 Ke7 45.b6 Ke8 46.b7 Ke7 47.h4 Kd8 48.b8Q Ke7 49.Qf8) 32...Ne3 33.Rf3 Nc2 34.Ra2 (34.Raf1!? Rhd8 35.Nb7 Rd7 36.Rf6 Kg7 37.Rb6 Ne3 38.Nc5 Rda7+–) 34...Nd4 35.Rff2 Kg5 (35...Ra7 36.Nf5+–) 36.Bd5 Ra5 (36...Rab8 37.Nf7 Kg6 38.Nh8 Rh8 39.Rf7+–) 37.Nf7 1–0. Hal1958 – Idris, playchess.de, 2006.

4.e3 Bb7 5.d4 e6 6.Nf3 Nf6 7.Bd3 d5 8.Nbd2 Nbd7 9.0–0 Bd6 10.Bb2 0–0 11.Ne5 Rc8 12.a4 Ne4 13.Be4 de4 14.f4 ef3 15.Ndf3 Ne5 16.Ne5 Be5 17.de5 Qg5 18.g3 Qe3 19.Rf2 Rcd8 20.Qe1 Qb3 21.Qc3 Qc3 22.Bc3 Rd3 23.Rc1 Rfd8 24.g4 Re3 25.Rd2 Rd2 26.Bd2 Re5 27.Re1 Re4 28.Re4 Be4 29.Bf4 Bd3 30.Bc7 Bc4 31.Bb6 Bb3 32.Ba5 Ba4 33.b6 Bc6 34.Kf2 Kf8 35.Ke3 Ke7 36.Kd3 Kd6 37.Kc4 Bb7 38.Bc3 f6 39.g5 Ba6 40.Kb3 e5 41.gf6 gf6 42.Ka4 Kc6 43.Ka5 Bb7 44.h4 h5 45.Bb2 Kd5 46.Kb5 f5 47.Ba3 c4 48.Bb2 f4 49.Kb4 e4 50.Bc3 e3 51.Be1 f3 52.Kc3 f2 0–1. popovicigelu – mansur4 (1685), kurnik, 2012.

4.e3 Bb7 5.Nf3 d5 6.cd5 Bd5 7.Nc3 e6 8.Bb2 Nf6 9.Be2 Bd6 10.h3 0–0 11.Nd5 ed5 12.Qc2 Nbd7 13.0–0 Qc7 14.Rac1 Qb7 15.Ne1 Rac8 16.Bf3 Be5 17.Nd3 Bb2 18.Nb2 Ne5 19.Be2 Ng6 20.Qf5 Rfe8 21.Bf3 Re5 22.Qb1 (22.Qc2!?+=) 22...Nh4–/+ 23.Be2 d4 24.f3 de3 25.de3 Re3 26.Rc2 Rce8 27.Bd1 (27.Bd3 Qd5 28.Qd1 Qd4–+ (28...Qa2?! 29.Nc4 Qa4 30.Ne3=)) 27...Nh5 28.Nc4 R3e6 29.Rd2 Ng3 30.Nd6 (30.Rd6 Rd6 31.Nd6 Qe7–+) 30...Re1 (30...Rd6!? 31.Rd6 Qe7 32.Qd3 Nf1 33.Bc2–+) 31.Nb7 Rf1 32.Kh2 Nhf5 33.Bc2 (33.Qf5 Nf5 34.Bb3 Rfe1–+) 33...Rb1 34.Bb1 Nf1 35.Kg1 Nd2 36.Bf5 c4 37.Nd6 Re5 (37...Rd8 38.Nc8 g6 39.Ne7 Kf8 40.Ng6 hg6 41.Bc2–+) 38.Bc2 (38.a4 c3 39.Bc2 Re2–+) 38...Rd5 39.Nc8 (39.Nf5 Rb5 40.a4 Rb2–+) 39...Rb5 40.Kf2 (40.a4 Rb2 41.Bd1 c3 42.Ne7 Kf8–+) 40...Rb2 41.Bf5 (41.Bd1 Nb1 42.Ke1 Nc3–+) 41...Ra2 42.Nb6 c3 43.Kg3 (43.Ke3 Nf1 44.Kd4 c2 45.Bc2 Rc2–+) 43...c2 44.Bc2 Rc2 45.Kf4 (45.f4 Ne4 46.Kf3 f5–+) 45...f6 (45...Rb2 46.Nd5–+) 46.Nd5 a4 47.g4 (47.Ke3 Nf1 48.Kd3 Rd2 49.Kc3 Rd5 50.Kb4–+) 47...a3 48.Ke3 a2 49.Kd3 Rb2 50.Kc3 a1Q 51.Kd4 (51.Ne3 Qa3 52.Kd4 Qb4 53.Kd3 Qb5 54.Kd4 Rb3 55.Nd5 Qc4) 51...Nf3 52.Kc5 (52.Ke4 Ng5 53.Kd3 Qf1 54.Kd4 Ne6 55.Kc3 Qc1 56.Kd3 Qc2 57.Ke3 Qe2) 52...Qa5 (52...Qa3 53.Nb4 Qb4 54.Kd5 Qd4 55.Kc6 Ne5 56.Kc7 Qd7) 53.Kd6 Rd2 54.Ke7 (54.Kd7 Qd5 55.Kc7 Qc5 56.Kb7 Rb2 57.Ka6 Qb6) 54...Rd5 (54...Qd5 55.h4 Qe4) 55.Ke6 Qc5 56.g5 (56.h4 Nd4) 56...Qd6# (56...Ng5#) 0–1. mikebaldini (1680) – sonata296 (1680), gameknot.com, 2014.

4.e3 Bb7 5.Nf3 Nf6 6.Be2 g6 7.0–0 A) 7...Qc7 8.Nc3 (8.Bb2 Bg7 9.Na3 0–0 10.Re1 Rd8 11.d3 d5 12.Be5 Qc8 13.Qa4=; 8.d4 Bg7 9.dc5 Qc5 10.Bb2 d6 11.Nc3 0–0 12.Qd2 Nbd7 13.Rfd1=; 8.d3 Bg7 9.Bb2 Bf3 10.Bf3 Ng4 11.g3 Bb2 12.Nd2 Ra7 13.Rb1+=) 8...Bg7 9.d4 0–0 10.Bb2 cd4 11.Nd4 Rc8 12.Rc1 Qd6 13.Bf3+=; B) 7...d5 8.d4 (8.Bb2 Bg7 9.d4 Nbd7 10.Ne5 Rc8 11.Nd7 Nd7 12.Bf3 cd4 13.Bd5=; 8.Re1 Bg7 9.Bb2 0–0 10.d4 Nbd7 11.Nbd2 Re8 12.dc5 Nc5 13.Rc1=; 8.a3 Bg7 9.Bb2 0–0 10.d4 Nbd7 11.Nc3 cd4 12.Nd4 dc4 13.Bc4=) 8...Bg7 9.Bb2 Nbd7 10.Ne5 Rc8 11.Nd7 Nd7 12.Bf3 cd4 13.Bd5=; C) 7...Bg7 8.Bb2 (8.Nc3 0–0 9.d4 d5 10.Ne5 dc4 11.Bc4 Nfd7 12.f4 e6 13.Ba3=; 8.d4 0–0 9.Nc3 d5 10.Ne5 dc4 11.Bc4 Nfd7 12.f4 e6 13.Ba3=; 8.Ne5 d6 9.Nf3 d5 10.Bb2 0–0 11.d3 Nbd7 12.Nc3 e5 13.Qc2=) 8...d5 9.d4 Nbd7 10.Ne5 Rc8 11.Nd7 Nd7 12.Bf3 cd4 13.Bd5=.

4.e3 Bb7 5.Nf3 Nf6 6.Be2 g6 7.Bb2 Bg7 (7...d5 8.Bf6 (8.cd5 Bd5 9.Bf6 ef6 10.Nc3 Bb7 11.0–0 Nd7 12.d4 Rc8 13.Rc1+=; 8.d4 Bg7 9.dc5 bc5 10.Nc3 0–0 11.0–0 dc4 12.Qa4 Nbd7 13.Rfd1+=; 8.0–0 Bg7 9.d4 Nbd7 10.Ne5 Rc8 11.Nd7 Nd7 12.Bf3 cd4 13.Bd5=) 8...ef6 9.0–0 Bd6 10.cd5 Bd5 11.Nc3 Bb7 12.d4 Nd7 13.Rc1+=; 7...e6 8.Na3 (8.d4 cd4 9.Bd4 Bg7 10.0–0 d6 11.a3 0–0 12.Qd2 Nbd7 13.Rd1=; 8.Nc3 Bg7 9.0–0 d5 10.d4 Nbd7 11.cd5 Nd5 12.Nd5 Bd5 13.Qb1+=; 8.0–0 Bg7 9.d4 cd4 10.Bd4 d6 11.Na3 0–0 12.Qd2 Ne4 13.Qc2=) 8...Bg7 9.d4 Qe7 10.dc5 Qc5 11.Nc2 Be4 12.Bd3 Bb7 13.0–0+/–) 8.0–0 (8.Nc3 0–0 9.0–0 d5 10.Nd5 Nd5 11.Bg7 Kg7 12.cd5 Qd5 13.d4+=; 8.d4 cd4 9.ed4 0–0 10.0–0 Qc7 11.d5 d6 12.Nd4 Nbd7 13.Bd3=; 8.d3 0–0 9.e4 d6 10.0–0 Nbd7 11.Nc3 e6 12.Re1 d5 13.cd5=) 8...0–0 (8...Qc7 9.d3 Bf3 10.Bf3 Ng4 11.g3 Bb2 12.Nd2 Ra7 13.Rb1+=) 9.d4 cd4 10.Bd4 (10.ed4 Qc7 11.d5 d6 12.Nd4 Nbd7 13.Bd3=) 10...d6 11.Qc2 (11.Nbd2 Nbd7 12.Bf6 Bf6 13.Nd4=) 11...Nbd7 (11...Qc7 12.Rd1 Nbd7 13.Nbd2=) 12.Rc1 (12.Na3 Qc7 13.Rfd1=) 12...Rc8 (12...Qc7 13.Qd1=) 13.Nbd2 (13.Qd1=) 13...Nc5 14.a4 Qd7 15.Qd1 Rfd8 16.Qb3 0–1. Kamaletdinov,Farit – Ignatov,Viktor, Belorechensk Russia, Open, 2013.

4.e3 d5 5.g3 Bb7 6.Bg2 e6. Adam.

4.e4 Bb7 5.Nc3 e6 6.d3 (6.Nf3 Be7+=) 6...g6 (6...d5 7.ed5 ed5 8.Nd5 Bd5 9.cd5=) 7.f4 (7.d4 Bg7 8.Be3 Qc7+=) 7...Bg7= 8.Bd2 Ne7 9.Nf3 0–0 10.Qe2 d5 11.h4 Nd7 (11...Qc7 12.e5+=) 12.h5 Qc7 13.hg6 Ng6 14.g3 (worse is 14.ed5 ed5 15.Qf2 Rae8 (worse is 15...Nf4 16.Qh4 Rfe8 17.Kd1+=) 16.Kd1 Nf6–/+ (16...Nf4? 17.Qh4 Nh5 18.Qh5+–); 14.cd5 ed5 15.e5 Rfe8–/+) 14...f5 (14...d4 15.Nd1+=) 15.Ng5 (15.ef5 ef5 16.Qe6 Rf7+/–) 15...Rae8 (15...Rfe8 16.Rh7 (worse is 16.Nh7 d4 17.Na4 fe4=) 16...Ngf8 17.Rh2+/–) 16.Nh7 (16.cd5?! ed5 17.Rh7 Nf6+=; 16.Rh7?! Nf6 17.Qh2 d4+=) 16...fe4 17.Qh5 e3 18.Qg6 ed2 19.Kd2 e5? (better is 19...dc4 20.Rh5 Qd8+–) 20.Bh3 Rf7 (20...dc4 21.Ng5 Nf6 22.Be6 Re6 23.Ne6+–) 21.Bd7 (21.cd5?! Nf8 22.Nf6 Rf6 23.Qe8 ef4+–) 21...Qd7 22.Ng5 (22.cd5?! Qf5 23.Qf5 Rf5+/–) 22...dc4 (22...Kf8 23.Nf7 Qf7 24.Qb6 Kg8 25.Nd5 Bd5 26.cd5 Qd5+–) 23.Rh8!! (23.Rh8 Kh8 24.Qh7; 23.Qf7?! Qf7 24.Nf7 Kf7 25.dc4 Bh1 26.Rh1 ef4 27.gf4 Bc3 28.Kc3 Re3 29.Kd2 Re4+=) 1–0. Kleinke,Uwe – Helbig, corr DDR, 1981.

4.e4 d6 +=.

4.e4 e5 =.

4.g3?! Bb7 5.Nc3 e6 6.d3 g6 7.f4 Bg7 8.Bd2 Ne7 =+ 9.Nf3 0–0 (9...d5!). Adam.

4.Bb2 Bb7

5.e3 d5 6.a4 Nd7 7.f4 e6 8.Nf3 Ngf6 9.d4 Rc8 10.Be2 Be7 11.0–0 0–0 12.Ne5 Ne5 13.fe5 Ne4 14.Nd2 Nd2 15.Qd2 cd4 16.ed4 dc4 17.Rac1 Bd5 18.Rcd1 f5 19.Bc3 Bg5 20.Qe1 Qe7 21.Bf3 Rfe8 22.Qg3 Bf3 23.Qf3 g6 24.g3 Red8 25.Kg2 Qd7 26.h4 Be7 27.Qf4 Qd5 28.Kh3 Rf8 29.Rg1 Rf7 30.Rdf1 Rcf8 31.Qe3 Rg7 32.Kh2 Bb4 33.Ba1 Rc7 34.Rd1 Rd7 35.Rg2 Rfd8 36.h5 Bf8 37.hg6 hg6 38.Qg5 Kh7 39.Rh1 Be7 40.Kg1 Kg7 41.Qh6 Kg8 42.Qh7 Kf8 43.Qg6 1–0. amator111 – pliszka2, kurnik, 2012.

5.e3 d6 6.Nf3 e6 7.d4 Nd7 8.Nbd2 Ngf6 9.Bd3 Be7 10.Rc1 0–0 11.0–0 Rc8 12.Qe2 Rc7 13.Ng5 h6 14.Nge4 Ne4 15.Ne4 Nf6 16.Nf6 Bf6 17.dc5 dc5 (17...Bb2!? 18.Qb2 Rc5=) 18.Rcd1+= Qe7 19.Bc1 (19.Bf6!? Qf6 20.Rd2+=) 19...Rd7= 20.Bc2 Rfd8 21.f4 Rd1 22.Rd1 Rd1 23.Qd1 Qd8 (23...e5!?+=) 24.Qd8= Bd8 25.Bb2 Bf6 26.Bf6 gf6 27.Kf2 f5 28.h3 h5 (28...Kg7 29.g3+=) 29.g3 (29.Bd1 h4+/–) 29...Kg7 30.Bd1 Kg6 31.Bf3 Bf3 32.Kf3 Kh6 33.e4 Kg6 34.a4 f6 35.Ke3 Kh6 (better is 35...fe4!? 36.Ke4 Kf7+=) 36.ef5+/– ef5 37.Kf2 Kg7 38.Ke3 Kh6 39.Kf3 Kg6 40.g4 ½–½. Freiberger,Jonas (2205) – Porth,Hartmut (2135), Werther Schloss op–A, 2007.

5.e3 e6 6.Nf3 Nf6 7.a4 d5 8.Be2 Nbd7 9.0–0 Qc7 10.Qc2 Rc8 11.d3 Bd6 12.Nbd2 0–0 13.e4 d4 14.Rfe1 h6 15.h3 Rce8 16.Nf1 g6 17.Bc1 Kg7 18.Qd2 Rh8 19.N3h2 g5 20.g3 Reg8 21.Qd1 Kf8 22.Bf3 Ke8 23.Bg2 h5 24.Ra2 h4 25.g4 Bf4 26.Rc2 Nf8 27.Qf3 (27.Nf3 e5+=) 27...Ng6+= 28.Qe2 Nd7 29.Nf3 f6 30.Kh1 Ke7 31.Kg1 Rf8 32.Kh1 Nde5 (better is 32...Bc1 33.Rcc1 Nf4–/+) 33.N3h2?? (better is 33.N1h2!?=) 33...Rd8 (33...Bc1 34.Rec1 Nf4 35.Qd2–+) 34.Kg1? (34.Nf3 Ng4! 35.Ng5 Nf2 (35...fg5?! 36.Qg4 Bc1 37.Rec1+=) 36.Qf2 fg5–+) 34...Rhf8?? (34...Bc1 35.Rec1 Nf4 36.Qd2–+) 35.Kh1? (35.Nf3 Kd7+=) 35...Kf7?? (35...Bc1 36.Rec1 Nf4 37.Qd2–+) 36.Kg1?? (36.Nf3!?+=) 36...Kg7 (better is 36...Bc1 37.Rec1 Nf4–+) 37.Bh1?? (37.Bd2 Bd2 38.Rd2 Nf4–/+) 37...Ba8 (better is 37...Bc1 38.Nd2 Nf4 39.Qf1–+) 38.Bg2? (better is 38.Nf3 Bc1 39.Ne5–+) 38...Rd7 (better is 38...Bc1 39.Rec1 Nf4–+) 39.Bh1?? (better is 39.Nf3+=) 39...Bc1–+ 40.Rcc1 (40.Nd2 Nf4 41.Qf1 Ba3–+) 40...Nf4 41.Qd2 Nh3 42.Kg2 Nf4 (42...Nd3!? 43.Kh3 Nf4 44.Qf4 Qf4 45.f3–+) 43.Kg1 Neg6 (better is 43...Ned3 44.Bf3 Nh3 45.Kg2 Qe5–+) 44.Bg2 Rh8 Black prepares h3 45.Nf3 (45.Qc2 Ne5 46.Rcd1 f5–+) 45...h3 (better is 45...Ng2 46.Kg2 Qf4 47.Ng5 Qg4 48.Kh1 Qg5–+) 46.Bh1 Rh6 47.N1h2 Rd8 48.Rcd1 e5 49.Qc1 Bb7 50.Qc2 Bc8 51.Nd2 Rdh8 52.Ndf1 Be6 53.f3 Rh4 54.Ng3 Kf7 55.Qd2 Ng2! 56.Re2 (56.Bg2 hg2 Passed pawn) 56...N6f4 57.Rf2 Qd7 58.Ne2 Ne3 59.Rc1 Bg4! 60.Ng3 (60.fg4; 60.Ng4 Ne2 Double attack) 60...Be6 0–1. Kis,Tomas (1645) – Svonavec,Stefan (2055), Piestany Pressburg op, 2007.

5.e3 e6 6.Nf3 Nf6 7.Be2 Be7 8.0–0 0–0 9.d4 d5 10.dc5 Bc5 11.Nc3 (11.cd5 Nd5 12.Nc3 Nd7 13.Rc1 Rc8 14.Qd3 Qf6 15.Rfd1 Rfd8 16.Nd5 Qb2 17.Rc2=; 11.Nbd2 Nbd7 (11...Qe7 12.cd5 Nd5 13.Rc1 Rd8 14.Qc2 Nd7 15.Rfd1 N7f6 16.Qa4 Rac8 17.Qh4=; 11...a4 12.cd5 Nd5 13.Rc1 Nb4 14.a3 Nd3 15.Bd3 Qd3 16.Nc4 Qf5 17.Be5=) 12.cd5 Bd5 13.Qb1 Rc8 14.Bd3 Bb7 15.Rd1 Qe7 16.Ne5 Ne5 17.Be5=; 11.Bd4 Qe7 (11...Bd4 12.Qd4 dc4 13.Rc1 Qd4 14.Nd4 Nbd7 15.Nd2 c3 16.Rc3 Rac8 17.Rac1=; 11...Nbd7 12.cd5 Nd5 13.Nc3 Rc8 14.Rc1 Bd4 15.Qd4 e5 16.Qd2 Nc3 17.Rc3=; 11...dc4 12.Bc5 bc5 13.Bc4 Nbd7 14.Nbd2 Nb6 15.Qc2 Nc4 16.Qc4 Qb6 17.e4+=) 12.cd5 Nd5 13.Bc5 Qc5 14.Qd2 Rc8 15.Rd1 Nd7 16.Nd4 Rc7 17.Bf3+=) 11...Nbd7 (11...dc4 12.Na4 Qe7 13.Bc4 Rd8 14.Qe2 Nbd7 15.Nc5 Nc5 16.Rac1 Rac8 17.Rfd1=; 11...Qe7 12.cd5 Nd5 13.Nd5 Bd5 14.Qa4 Nd7 15.e4 Bb7 16.Rac1 e5 17.Rfd1=; 11...Qc7 12.cd5 Rd8 13.Qa4 Nd5 14.Nd5 Bd5 15.Rac1 Nd7 16.Rfd1 Qb7 17.Qg4+=) 12.cd5 Nd5 13.Nd5 Bd5 14.Nd4 (14.Qd3 Be7 (14...Bd6= 15.e4 Nf6 16.ed5 Nd5 17.Qd4+–) 15.Bd4 Nc5 16.Qc3 f6 17.Bc4=; 14.Qa4 Be7 15.Rfd1 Rc8 16.Ne5 Ne5 17.Be5=) 14...Qg5 (14...Rc8 15.Bf3 Ne5 16.Bd5 Qd5 17.Nb3= (17.Qh5=)) 15.Bf3= (15.Nf3 Qg4 16.h3 Qg6 17.Rc1=) 15...Nf6 (15...Bd4 16.Bd4 Rfd8 17.Bd5+=) 16.Bd5 Nd5 (worse is 16...ed5 17.Nf3 Qg6 18.Bf6 Qf6 19.Qd5+=) 17.Nc6 Nb4 18.Ne5 (18.Qf3 Nd3 19.Rab1 Bb4=) 18...Rad8 19.Qe2 f6 20.Nf3 White terminates the opponent with strong threats 20...Qg4 21.Rfd1 Nd5 22.h3 Qa4 23.Nd4 Nc7 24.Rdc1 Bd4 25.Bd4 Nb5 (worse is 25...Qb5 26.Qb5 Nb5 27.Bb6+/–) 26.Bb6 Rc8? (better is 26...Rb8 27.Bc7 Rbc8=) 27.Bc5+– Na3 28.Bf8 Rf8 29.Qa6 Re8 30.Rc8 (30.Rc8 Rc8 31.Qe6 Kf8 32.Qc8 Kf7 33.Rc1+–) 1–0. Baranov,G (2320) – Ignatov,V (2275), Doroshkevich mem, 2008.

5.Nf3 e6 6.d3 Nf6 7.e4 Be7 8.Be2 0–0 9.0–0 d5 10.e5 Ng4 11.h3 Nh6 12.d4 dc4 13.Bc4 Nd7 14.d5 ed5 15.Bd5 Bd5 16.Qd5 Qc7 17.Na3 Rad8 18.Qe4 f5 (18...Nb8+=) 19.ef6 (better is 19.Qc6 Rc8 20.Qe6 Rf7 21.Qc4+–) 19...Bf6= 20.Bf6 Nf6 21.Qc2 Qf4 22.Nc4 Nd5 23.Nce5 Kh8 24.Rad1 Nb4 25.Qb3 Rd1 26.Rd1 g6? 27.a3+– a4 28.Qa4 Na2 29.Qf4 Rf4 30.Rd6 Nf5 31.Rb6 Ra4 32.Rb8 Kg7 33.b6 Ra3 34.b7 Nd6 35.Ra8 (35.Ra8 Rb3 36.b8Q Rb8 37.Rb8+–) 1–0. bratek55 – brodziarek (1630), kurnik, 2011.

5.Nf3 Nf6 6.e3 e6 7.Be2 d5 8.0–0 Nbd7 9.d3 Bd6 10.Nbd2 0–0 11.Rc1 Rc8 12.Re1 Bb8 13.Bf1 Qe7 14.g3 Rfd8 15.Qe2 e5 16.d4 (16.e4!? d4 17.Bh3=) 16...e4–/+ 17.Nh4 g6 (17...Qe6!?–/+) 18.Bh3= Rc7 19.Ng2 Nh5 20.Bg4 Ng7 21.Nf4 f5 22.Bh3 cd4 23.Bd4 Ne6 24.Ne6 Qe6 25.cd5 Bd5 26.Rc7 Bc7 27.Rc1 Be5 28.Be5 (28.Nc4!?+=) 28...Ne5–/+ 29.Rc7 Qd6 30.Rc2 Bf7 31.Bf1?? (better is 31.Bg2–/+) 31...Qd2!!–+ 32.Rc8 (32.Rd2 Nf3 Double attack (32...Nf3 Decoy); 32.Qd2 Nf3 Double attack (32...Nf3 Decoy)) 0–1. Chirpii,Alexandru – Polishchuk,Oleg (2225), Geller Memorial op–B 4th, 2008.

4.Nf3 Bb7

5.Bb2 e6 6.e3 d6 7.Be2 Nf6 8.0–0 Nbd7 9.Nc3 Be7 10.d3 Qc7 11.Rc1 0–0 12.Nd2 Ne8 13.f4 f5 14.Bf3 Nef6 15.Bb7 Qb7 16.Nf3 Ng4 17.Qe1 Nh6 18.Qg3 Bf6 19.Rc2 Rae8 20.Re2 Kh8 21.Rfe1 Qb8 22.h3 Qd8 23.Ng5 Nf7 24.h4 h6 25.Nf3 Kh7 26.e4 Rg8 (26...fe4 27.Re4 e5 28.f5+=) 27.Qh3 (27.ef5 ef5 28.h5 Re2 29.Qg6 Kh8 30.Re2 Rf8+/–) 27...g6 (27...fe4!? 28.Re4 Nf8+=) 28.ef5+/– ef5 29.Ng5 Ng5 30.hg5 (30.fg5 Re2 31.Re2 Bd4 32.Kf1 hg5 33.hg5 Kg7 34.Qh6 Kf7 35.Qh7 Rg7+=) 30...Bd4 31.Kf1 h5 32.Nd5 Bb2 33.Rb2 Re1 34.Ke1 Re8 35.Re2 Kg7 36.Qf3 Kf7 37.Re8 Qe8 38.Kd2 Qh8 39.Nc3 Qd4 40.Qd5 Qd5 41.Nd5 Ke8 42.Kc3 Kd8 43.Kb3 Ke8 44.Ka3 Kd8 45.Ka4 Ke8 (45...h4 46.a3+=) 46.Nb6 Nb6 47.Ka5 Nc8 (47...Nd7!? 48.Ka6 Nf8+/–) 48.b6+– Kd7 49.b7 Na7 50.Kb6 Nc6 51.a4 Nb8 52.a5 1–0. Dzieniszewski,Andrzej – Kasprzyk, Poland, 1976.

5.d4 e6 =.

5.e3 e6 6.Be2 d5 7.Bb2 Nd7 8.0–0 Qc7 9.d4 (9.cd5 ed5 10.d4 c4+=) 9...Ngf6 (9...dc4 10.Bc4 cd4 11.Qd4 Bf3 12.gf3=) 10.Ne5 (10.dc5 Nc5 11.Bf6 gf6 12.cd5 Bd5=) 10...Ne5 (10...cd4 11.Nd7 (11.Bd4? Ne5 12.cd5 Nd5–+; worse is 11.ed4 Bd6+=; worse is 11.Qd4 Bc5 12.Qh4 Ne5–+) 11...Nd7 12.Qd4=) 11.de5 Nd7 12.f4 0–0–0 (12...dc4!? 13.Nd2 Be7=) 13.cd5 Bd5 14.Nc3 Ne5 15.fe5 Bg2 16.Kg2 Rd1 17.Nd1 (worse is 17.Rfd1 Qe5 18.Rd3 Bd6–/+; worse is 17.Bd1 Qe5 18.Na4 Qe4 19.Rf3 Be7=) 17...f5 18.ef6 gf6 19.Rf2 (19.Bf6? Bg7–+) 19...Bd6 (19...Rg8 20.Kf1 f5 21.Bc4=) 20.Kh1 (20.Bc4!?+=) 20...Rg8 21.Nc3 (21.Rf6 Qg7 22.Rf8 Qf8–+; 21.Bf6 Be5 22.Be5 Qe5+=) 21...Be5 22.Bf3 f5 23.Bc6 Qe7 24.Na4 Bc7 25.Raf1 Qh4 26.e4 Rg6 (26...Rg4 27.a3+=) 27.Bc3 (27.ef5 ef5 28.Nc3 Be5=) 27...Rh6 The pressure on h2 grows 28.Rg2 (28.Rd2 Kb8 29.Rg2 Ka7=) 28...Rg6= 29.Rff2 (better is 29.Rd2!?=) 29...Qh5–/+ The mate threat is Qd1 30.Nb2 Rg2 31.Rg2 Qf3 32.Bd2?? (better is 32.Bh8–/+) 32...fe4–+ (32...fe4 33.Na4 Qd1 34.Rg1 Qd2 (34...Qa4?! 35.Rg8 Bd8 36.Bg5–+) 35.Rg8 Bd8 36.Nb6 Kb8–+) 0–1. Labahn,Wolfgang – Habermann, corr, 1989.

5.e3 e6 6.Be2 Nf6 7.0–0 d5 8.cd5 Nd5 (8...ed5 9.d4=) 9.Bb2 Nd7 10.Na3 Rc8 (10...N7f6 11.d4=) 11.Nc4 (11.d3 f6+=) 11...N7f6 (11...f6 12.d3=) 12.Rc1 (12.d3 Be7 13.Be5 Ng4 14.Bg7 Rg8+/–) 12...Nb4 (12...Be7 13.d3 0–0 14.Qd2+=) 13.Qb3 (13.a3 Nbd5+/–) 13...Bf3 (13...Be7!?+=) 14.Bf3+/– (worse is 14.gf3 a4 15.Qa4 Ra8=) 14...Nd3 (14...Nbd5!?+/–) 15.Bf6+– gf6 16.Bc6 Rc6 17.bc6 Nc1 18.Rc1 Bd6 19.Nd6 Qd6 20.Qb6 0–0 21.Qc5 (worse is 21.Rc5 Rb8 22.Qb8 Qb8–/+; 21.Qa5?! Qc6 22.d4 c4+–) 21...Qd2 22.Qc2 (22.c7 Rc8+–) 22...Qc2 23.Rc2 Rc8 24.a4 Kf8 25.Rc5 Ke7 26.Ra5 (26.f4 f5+–) 26...Rc6 Threatening mate: Rc1 27.Ra7 (27.g4 e5+–) 27...Kd6 28.g3 Rc7 29.Ra8 f5 30.Kg2 Ke5 (30...e5 31.Ra6 Ke7 32.a5+–) 31.a5 Rc5 (31...Ke4 32.Rd8+–) 32.a6 Ra5 33.Kf3 h5 34.a7 (34.Ra7 Kf6+–) 34...Ra3 (34...Ra2 35.h3+–) 35.Ke2+– Ke4 (35...Ra2 36.Kd3+–) 36.f3 Ke5 37.f4 Ke4?? (37...Kf6+–) 38.Rd8 Ra2 (38...Re3 39.Kd2 Ra3 40.a8Q Ra8 41.Ra8 Kd4+–) 39.Rd2 (39.Rd2 Rd2 40.Kd2+–) 1–0. Bonetti,Shane – the_sicilian, ICC, 2003.

5.e3 e6 6.Be2 Nf6 7.0–0 d5 8.cd5 Nd5 (8...ed5 9.d4=) 9.Bb2 Nd7 10.d3 (10.Nc3 N7f6=) 10...Qc7 (10...N7f6 11.Nbd2=) 11.Nbd2 (11.Qa4 Bd6=) 11...N5f6 (11...Bd6 12.Nc4 0–0 13.Re1=) 12.Nc4+= Be7 13.Nfe5 0–0 14.Bf3 Bd5 15.Nc6 (15.Rc1 a4+=) 15...Rae8 16.Rc1 Bd6 17.g3 (17.h3 e5+=) 17...e5= 18.Bd5 Nd5 19.Qf3 (19.d4 cd4 20.ed4 e4+=) 19...N5f6 (19...Nb4!? 20.Nb4 ab4=) 20.d4 e4 21.Qf5 h6 (21...a4 22.Rfd1 cd4 23.Nd6 Qd6 24.Rd4+/– (worse is 24.Nd4 Re5 25.Qh3 Rc5+=; 24.ed4?! a3 25.Bc3 Nd5=)) 22.Rfd1 Re6 23.Nd6 Rd6 24.dc5 bc5 The passed pawn on b5 quickly leads to threats 25.Bf6 Nf6 26.Qc5 Re6 (26...Rd1 27.Rd1 Qb7 28.Ne7 Kh7 29.Nd5+–) 27.Nd8 Qc5 28.Rc5 Re7 (28...Rb6 29.a4+–) 29.Nc6 (29.Rc4 Rd7 30.Rd7 Nd7+–) 29...Rc7 30.a4 Kh7 (30...Rfc8 31.Ne7! Kh7 32.Rc6 (worse is 32.Nc8 Rc5 33.Nd6 Kg6+–) 32...Rc6 33.Nc6+– (33.bc6?! Rc7 34.Rc1 g6+/–)) 31.b6 Rb7 32.Rb5 Ra8 33.Na5 Rbb8 (33...Rb6 34.Rb6 Ra5+–) 34.Nc6 (34.Nc6 Rb7 35.a5+–) 1–0. Bauer,Christian (2625) – Illijin,Neboisa (2250), MTO Biel SUI, 2007.

5.e3 e6 6.Be2 Nf6 7.0–0 Be7 8.Bb2 =.

5.e3 Nf6 6.Be2 =.

3.c4 d5

4.cd5 Nf6 5.Nc3 Nd5 6.Bb2 e6 7.g3 (7.Nf3 Nc3 8.Bc3 c4=) 7...b6 (7...Nc3 8.Bc3 Qd5 9.Nf3=) 8.Bg2= Bb7 9.Nf3 Nd7 10.0–0 h5 11.Re1 N7f6 12.Nd5 Bd5 13.d3 Rc8 14.e4 Ba8 15.Qe2 Be7 16.Rad1 Kf8 17.a4 Ne8 18.d4 c4 19.d5 ed5 20.ed5 Bb4 Black plans c3 21.Rf1 (21.Bh3 Rc7 22.Be5 Be1 A) worse is 23.Re1 A1) worse is 23...Bd5 24.Bc7 Nc7 25.Bg2+=; A2) worse is 23...Qd5 24.Bc7 Nc7 25.Qe7 Kg8 26.Bg2+= (26.Qc7 Qf3 27.Re8 Kh7 28.Bf5 Qf5 29.Rh8 Kh8 30.Qd8 Kh7 31.Qa8 c3–+); A3) 23...Re7–/+; B) worse is 23.Ne1 Nd6+=; C) 23.Bc7 Nc7 24.Ne1+=) 21...c3+= 22.Bc1 (22.Bh3 Rc7 23.Bc1 c2+=) 22...Rc5 Increasing the pressure on the isolated pawn on d5 (22...c2 23.Rd3 Bd5 24.Ne1+=) 23.Ne1 (23.Bg5 f6 24.Nd4 Kf7+/–) 23...Rc7 (23...Bd5 24.Be3 Nf6 25.Bc5 Bc5 26.Bd5 c2 27.Nc2 Nd5+–) 24.Nc2+/– Rd7 (24...h4+/–) 25.Bf4 (25.Nb4!? ab4 26.Qe4+/–) 25...h4 (25...Bd5 26.Bd5 Rd5 27.Rd5 Qd5 28.Rd1=) 26.Rfe1 Bc5 27.Nd4?? (27.Bg5 Be7 28.Be7 Re7 29.Qd3 Re1 30.Re1+=) 27...hg3+= (27...Bd5 28.Bd5 Rd5 29.Nc6 Rd1 30.Nd8 Rd8 31.Be3+/–) 28.Bg3 Re7 (28...Bd5 29.Nc6 Bc6 30.bc6=) 29.Qd3 (29.Qc4+=) 29...Rh5?? (29...Re1 30.Re1 A) 30...Bd5? 31.Nc6 Bf2 32.Bf2+– (32.Kf2?! Qf6 33.Kg1 Bg2 34.Kg2 Rh6+–); B) 30...Qg5+=) 30.Nc6 Re1 31.Re1 Qf6? (better is 31...Bc6 32.bc6 Bb4+/–) 32.Qe2 Kg8 (32...Bc6 33.Qh5 (33.dc6?! Qe6+–) 33...Bf2 34.Bf2+–) 33.Qh5 (33.Qh5 Bc6 34.bc6+–) 1–0. Stecki,Witold – Hanack,Christian, GER, 1988.

4.cd5 Nf6 5.d4 Qd5 6.Bb2 (6.e3!?=) 6...cd4–/+ 7.Qd4 Qb5 8.e4 Qb4 (8...Qh5 9.Nc3 e5 10.Qd3–/+) 9.Nd2 (9.Qb4 ab4 10.Nd2 Nc6+=) 9...Nc6 10.Qc3 (10.Qb4 Nb4 11.Bb5 Bd7 12.Bd7 Nd7+=) 10...e6 (10...e5 11.Bc4–/+) 11.0–0–0 (11.Bd3!?–/+) 11...Qb6 (11...e5 12.Bc4–+) 12.f4 (12.Qg3 Qc5 13.Kb1 e5–/+) 12...Bb4 (12...Bd7 13.Bc4–+) 13.Qg3–/+ Bd2 14.Rd2 Ne4 15.Qg7 Rf8 Black threatens.... what? 16.Ba3 Threatening mate... how? 16...Nb4 17.Rd4?? (better is 17.Rc2–+) 17...Nf2 (17...Qc5 18.Bc4 Nf2 19.Kd2 Nh1 20.Ne2–+) 18.Nf3 (18.Bb5 Qb5 19.Rd8 Kd8 20.Qf8 Kc7 21.Bb4 Qc4 22.Kd2 Qb4 23.Qb4 ab4–+) 18...Nh1 19.Ne5 (19.Kd2 h5–+) 19...Na2 20.Kc2 Do you see the mate threat? 20...Nb4 21.Kc1 (21.Bb4 ab4 22.Nc4 Qc5–+) 21...Qc5 22.Bc4 (22.Nc4 f6 23.Be2 Qd4 24.Bb4 ab4 25.Bh5 Kd8 26.Qf8 Kc7 27.Qd6 Qd6 28.Nd6 Kd6–+) 22...b5 (better is 22...f6 23.Kb1 fe5 24.Qe5 Qe5 25.fe5–+) 23.Qf6 The mate threat is Rd8 23...Bb7 24.Nd7 (24.Bb4 Qb4 25.Be6 Qd4 26.Bf7 Rf7 27.Qf7 Kd8 28.Qb7 Qf4 29.Kc2 Qa4 30.Kc1 Qa3 31.Kc2 Qc5 32.Kb1 Qg1 33.Kb2 Qf2 34.Kb1 Qf5 35.Kc1 Rc8 (worse is 35...Qe5 36.Qa8 Ke7 37.Qa7 Ke6 38.Qa5–+) 36.Nc6 Rc6 37.Qc6 Qc8 38.Qc8 Kc8–+) 24...Qe7 (better is 24...Nd3! 25.Rd3 Qc4 26.Kd2 Qa2 27.Qb2 Qb2 28.Bb2–+) 25.Bb5 (25.Qe5 f6 (25...bc4 26.Bb4 Qd7 27.Rd7 Kd7 28.Qd6 Kc8 29.Qf8 Kc7 30.Qf7 Kc6 31.Qe6 Kb5 32.Qf5 Kb4 33.Qb1 Ka4 34.Qb7+–) 26.Qb5 Bc6 27.Bb4 Bb5 (27...Qb4 28.Qc6 Qa3 29.Kc2+/–; 27...ab4 28.Qc6 Kf7 29.Nf8+–; 27...Bd7?! 28.Be7 Bb5 29.Bb5 Kf7 30.Bf8 Kf8 31.Rd7+=) 28.Be7 Ke7 29.Bb5 Rac8 30.Kb2 Rfd8–+) 25...Qf6 26.Nf6 Ke7 27.Nh7 Threatening mate: Rd7 27...Rfd8 (better is 27...Rfc8!? 28.Kb1 Bd5 29.Bb4 ab4 30.f5–+) 28.Rb4 ab4 29.Bb4 Rd6 (29...Rd6 30.Nf6 Kf6 (worse is 30...Bg2 31.Ne8 Re8 32.Be8–+) 31.Bd6 Bg2–+) 0–1. Bubla,Pavel – Pridorozhni,Aleksei (2240), Decin op, 1997.

4.cd5 Nf6 5.Nf3 Nd5 6.e4 Nf6 +=.

4.e3 dc4 5.Bc4 Bf5 6.Bb2 (6.Qf3 Qd7 7.Nc3 Nf6+/–) 6...Bd3 (better is 6...Nf6!?+=) 7.Qb3 e6?? 1–0. Labahn,Wolfgang – Kolbus, Espelkamp, 1981.

4.e3 d4 5.d3 e5 6.Nd2 b6 7.Ngf3 Bd6 8.Be2 Ra7 9.0–0 Nd7 10.Ne4 Nf8 (10...Ndf6 11.Nd6 Qd6 12.ed4 cd4 13.Nd2+=) 11.ed4 ed4 12.Re1 Be6 13.Nfg5 h6 14.Ne6 Ne6 15.Bf3 (15.Bh5 Re7+/–) 15...Bb8 (15...Ne7 16.a3+/–) 16.a3 Nf6 17.Nf6 Qf6 18.Bc6 Kd8 (18...Kf8 19.Ra2+/–) 19.Qh5 (19.Re4 Kc8+–) 19...Re7 20.Bf3 Bc7 (20...g5 21.Qh3+/–) 21.Qd5 Rd7?? (better is 21...Ke8+–) 22.Qa8 Ke7 23.Qh8 Qg6 24.Qc8 Qd3 (24...Bd6+–) 25.Bc6 Qc3 26.Bh6! gh6 27.Bd7 Bh2 28.Kh2 Qc4 29.Qb7 Kf8 30.Rac1 Qd3 31.Be6 (31...Qg6 32.Qb6 Qh5 33.Kg1+–) 1–0. Trkn – guest1114, ICC, 2004.

4.e3 e6 5.Bb2 b6 6.f4 Bb7 7.Nf3 Nd7 8.Be2 Ngf6 9.0–0 Bd6 10.d3 Qc7 11.Qe1 0–0–0 (11...0–0 12.Nbd2=) 12.g3 (12.Qg3 dc4 13.Qg7 Nd5=) 12...dc4= 13.dc4 Ng4 14.Qc3 Ndf6 15.Nbd2 h5 16.Rad1 Ba8 (16...Kb8 17.Rfe1=) 17.Ng5 h4 18.Bf3 (18.e4!?+=) 18...Bf3= 19.Ndf3 hg3 20.hg3 Qb7 21.Nf7?? (better is 21.Qe1 Ne4 22.Bg7 Ng5 23.fg5–/+) 21...Qf7–+ 22.Kg2 (22.Nh4 Ne4 23.Qe1 Be7 24.Rd8 Bd8–+ (24...Kd8?! 25.Qd1 Nd6 26.Qg4+=)) 22...Qb7 (22...Ne4 23.Qe1–+) 23.Rh1 Rh2! 24.Rh2 Nh2 25.e4 Qe4 (25...Ne4?! 26.Qg7 Qg7 27.Bg7 Nf3 28.Kf3 Ng3 29.Bf6–+) 26.Re1 Qf3 27.Qf3 Nf3 28.Kf3 Re8 29.g4 Re7 30.Rh1 (30.g5 Nd7–+) 30...e5 31.g5 e4 32.Kg3 (32.Ke3 Ng4 33.Ke2 Rf7 34.Bg7 Rg7–+) 32...Ne8 33.Bc3 (33.Re1 Bc7 34.Be5 Kd7 35.Re4 Nd6–+) 33...Rf7 (33...Bc7 34.Kg4 Nd6 35.Rh7 Nc4 36.Bg7–+) 34.Bd2 (34.Be5 Be5 35.fe5 Rf3 36.Kg4 Rc3–+) 34...Nc7 (34...Bc7!? 35.Rh8 Kd7 36.Rh7–+) 35.Re1 Ne6 36.Kg4 Bf4 (better is 36...Nf4 37.Rf1–+) 37.Rf1 (37.Re4 Bd2 38.Re6 Rf4 39.Kh5 Rc4 40.Rb6–+) 37...Bd2 38.Rf7 e3 39.Kf5 (39.Re7 Nd4 40.Rg7–+) 39...e2 40.Ke6 e1Q 41.Kd6 Bg5 42.Rc7 Kd8 43.Rg7 Be7 0–1. Kruis,Rudy (2005) – Lakat,Gyula (1965), Budapest FS08 FM–B, 2005.

4.e3 Bf5 5.Bb2 (5.cd5 Nf6=) 5...e6 6.a4 (6.cd5 ed5 7.Nf3 Nf6=) 6...dc4 7.Bc4 Bd3 8.Qb3 Bc4 9.Qc4 Nd7 (9...Nf6 10.Bf6 Qf6 11.d4=) 10.Nf3 Qc7 (10...Nb6 11.Qe4 Qd5 12.Qd5 Nd5 13.e4=) 11.0–0+= Rc8 12.Na3 Ngf6 13.Rfc1 (13.d3 Bd6+=) 13...Bd6= 14.h3 (14.d3 0–0=) 14...h6 (14...0–0 15.d3=) 15.Qc2 (15.d3 0–0=) 15...e5 (15...0–0 16.Nc4=) 16.d4 (16.d3 0–0+=) 16...ed4 17.ed4 0–0 18.Qd1 (18.dc5 Qc5 19.Qc5 Bc5= (worse is 19...Nc5 20.Bf6 gf6 21.Nc4+=)) 18...Bf4+= 19.Rc2 Qd8 (19...Rfd8 20.dc5 Nc5 21.Qe2=) 20.g3 (20.dc5 Nc5 21.Qd8 Rfd8+/–) 20...Bb8 (20...Bd6 21.dc5 Nc5 22.Bf6 Qf6 23.Nc4–/+) 21.Rac1 (21.dc5 Nc5 22.Qd8 Rfd8 (22...Rcd8?? 23.Bf6 Rd5 24.Bc3+–) 23.Bf6 gf6+/–) 21...Ne4 (21...Bd6 22.Nc4 Be7 23.dc5 Rc5 24.Qd2+=) 22.Nb1 (better is 22.dc5 Ndc5 23.Qd4 Qd4 24.Bd4+=) 22...Ndf6 (22...Bd6 23.dc5 Ndc5 24.Nc3=) 23.Ba3 (23.dc5!? Nd5 24.c6 bc6 25.Qd4+/–) 23...b6 (23...Qd7 24.Kg2 (worse is 24.dc5 Qh3 25.Bb2 Rfd8=) 24...Ba7 25.dc5 Qd1 26.Rd1 Bc5 27.Bc5 Rc5 28.Rc5 Nc5 29.Nc3+=) 24.Kg2 (24.dc5 Qd1 25.Rd1 bc5+=) 24...Re8 (24...Bd6 25.Nbd2=) 25.Nbd2 (25.dc5!? Qd1 26.Rd1 bc5 27.Nbd2+/–) 25...Nd2+= 26.Qd2 (26.Rd2 c4=) 26...Ne4 27.Qd1 Re6 (better is 27...Bd6=) 28.Nd2?? (better is 28.dc5 Qd1 29.Rd1 bc5 30.Rc4+/–) 28...Qd4–/+ 29.Bb2?? (better is 29.Nc4–/+) 29...Qf2 0–1. Rongen – Kamps, Dieren, 1994.

4.e3 Nf6 5.Bb2 e6 6.d4 =.

4.e3 Nf6 5.Bb2 e6 6.Nf3 Be7 7.d4 Nbd7 8.a4 (8.cd5 Nd5 9.dc5 Bf6 10.Bf6 Qf6+=) 8...cd4 (8...0–0 9.cd5 Nd5 10.Bd3=) 9.Bd4 0–0 10.Bd3 (10.cd5 Bb4 11.Nbd2 e5= (worse is 11...ed5 12.Bd3+=)) 10...Bb4 11.Nc3 dc4 12.Bc4 (12.Bc2 Qe7 13.Ne5 Nd5 14.Nd7 Nc3 (14...Bc3?! 15.Bc3 Bd7 16.Qh5–/+) 15.Bh7 Kh7 16.Nf8 Kg8+=) 12...Qc7 (12...Qe7 13.0–0 e5 14.Rc1–+) 13.Qb3 e5 14.b6 Qd6 (14...Nb6 15.Ne5 Ne4 16.Bb6 Qe5 17.Bd4=) 15.0–0 (15.0–0 ed4 16.Nb5–+). vidyashankarh (2055) – vairisk (2615), net–chess.com, 2003.

4.e3 Nf6 5.Bb2 Bf5 6.d4 e6 7.a4 (7.cd5 ed5 8.dc5 Bc5=) 7...Nbd7 (7...dc4 8.Bc4 cd4 9.Qd4 Bb4 10.Ke2+=) 8.Nd2 (8.cd5 Nd5 9.Nf3 Rc8=) 8...cd4 9.Bd4 Bb4 10.Ngf3 0–0 (10...Ne4 11.Ra2–/+) 11.Be2 (11.cd5 Nd5 12.Bc4 N5b6+=) 11...Ne4 (11...e5 12.Bb2+= (12.Ne5? Ne5 13.Be5 Ne4–+)) 12.0–0= Nc3 13.Bc3 Bc3 14.Ra2 Nb6 15.c5 Nd7 16.Qc1 (16.Nd4 Nc5 17.Nf5 ef5+=) 16...Bb4 17.Nb3 (17.c6 bc6 18.bc6 Nc5+=) 17...Rc8 Now all is on c5 18.c6 Nb8 19.Nbd4 Bg6 (better is 19...Be4!?–/+) 20.Ne5= bc6 21.bc6 (21.Ndc6 Nc6 22.Nc6 Qf6=) 21...Qe7 (21...Be4 22.f3 Bf5 23.f4=) 22.Bb5 (22.Ng6 fg6 23.Rc2 Rf7+=) 22...Rc7 23.Ng6 hg6 24.f4 Rfc8 25.Rc2 Qd6 26.Bd3 Qe7 (26...Nc6? 27.Nb5 Qe7 28.Rff2+–) 27.e4 (27.Rff2 Ba3 28.Qe1 Bc5=) 27...Ba3 28.Qb1?? (better is 28.Qe3 Bc5 29.Rfc1 Rc6 30.ed5 Bd4 31.Qd4 ed5 32.Rc6 Nc6 33.Qc5–/+) 28...Bc5–+ (28...Nc6?! 29.Rc6 Rc6 30.Nc6 Qc5 31.Kh1 Qc6 32.ed5 Qd5 33.Qb5–/+) 29.Rc5 (29.Qb5 Bd4 30.Kh1 Nc6 31.ed5 Na7 32.Rc7 Qc7–+ (worse is 32...Rc7 33.Qa5 Bc3 34.Qb6 ed5 35.Qb3–+)) 29...Qc5 (29...Qc5 30.Qb2 Nc6–+) 0–1. Trkn – Al Bundy, itsyourturn.com, 2001.

4.e3 Nf6 5.Bb2 Bg4 6.Nf3 h6 7.a4 Nbd7 8.d3 e5 9.Be2 Bd6 10.Nbd2 Qe7 11.0–0 e4 12.Ne1 Be2 13.Qe2 0–0 14.f3 ed3 15.Qd3 Rfe8 16.Nc2 Ne5 17.Qe2 Qe6 18.Na3 Ned7 19.Nc2 Nb6 20.cd5 Nfd5 21.Ra3? (21.Ne4 Rad8+=) 21...Nb4?? Black prepares c4 (better is 21...c4!? 22.Ne4 Ba3 23.Ba3 Qg6–+) 22.Na1 c4 23.e4 (23.Ne4!?–/+) 23...Nd3 24.Ra2?? (better is 24.Rd3 cd3 25.Qd3–+) 24...Nb2 25.Rb2 c3 (better is 25...Qe5 26.Rfb1 Qh2 27.Kf1 Qh1 28.Kf2 Bc5 29.Kg3–+) 26.Rc2 cd2 27.Rd2 0–1. Sebesta,Petr – Lipus,D, Orlova CZE, 2013.

4.e3 Nf6 5.Bb2 g6 6.Nf3 Bg4 7.Be2 (7.h3 Be6+=) 7...Bg7= 8.d4 Nbd7 (8...dc4 9.Bc4 Nbd7 10.Nbd2=) 9.Nbd2 (9.dc5 dc4 10.c6 bc6 11.bc6 Nb6+=) 9...0–0= 10.Rc1 Rc8 11.0–0 Re8 12.Nb3 (12.dc5 Nc5 13.cd5 Qd5+=) 12...b6 (12...cd4 13.Bd4 dc4 14.Nbd2=) 13.Qe1 (13.dc5 Nc5 14.Bf6 Bf6 15.cd5 Ne4+=) 13...e6 (13...dc4 14.Nbd2=) 14.Ba3 (14.dc5 Nc5 15.Nc5 Rc5=) 14...Ne4 15.Nfd2 (15.dc5 bc5 16.h3 a4+=) 15...Be2+= 16.Qe2 Nd6 (better is 16...Nd2!? 17.Nd2 cd4 18.ed4 Bd4–/+) 17.dc5 (17.cd5 Nb7 18.dc5 bc5 19.de6 Re6+/–) 17...Nc5 (17...bc5 18.cd5 Qb6 19.de6 Re6 20.Nc4 Qb5 21.Nba5+=) 18.Bc5 (18.Nc5 bc5 19.cd5 Qb6 20.de6 Re6+/–) 18...bc5+= 19.a4 Bb2 (19...Qb6+=) 20.cd5 (20.Rc2 Ba3 21.Qf3+=) 20...ed5?? (better is 20...Bc1 21.Rc1 ed5 22.Rc5 Rc5 23.Nc5 d4+=) 21.Rc5+/– Rc5 22.Nc5 Bc3 (22...Ba3 23.Na6 Ne4 24.Qd3 Nd2 25.Qd2+– (25.Qa3 Nf1 26.Kf1 Qh4–/+)) 23.Ndb3 Qb6 (better is 23...Ne4+–) 24.Qd3 d4 25.ed4 Bb4 26.h3 Nf5 27.Rc1 (27.Rd1 Rc8+–) 27...Qf6 (27...Rd8 28.Ne4+–) 28.Ne4 Qe6 29.f3 Nh4? (29...Kg7+–) 30.Rc6 Qe7 (30...Qf5 31.Nf6 Kh8 32.Qf5 Re1 33.Kf2 Nf5 34.g4+–) 31.Nf6 Kh8 32.Ne8 Qe8 (32...Qe1 33.Kh2 Qe8+–) 33.Qe4 Qd8 34.b6 Bd6 (34...Nf3 35.Qf3 Kg7 36.Qg3+–) 35.b7 (35.Rd6 Qd6 36.Qe5 Qe5 37.de5 Kg7+–) 35...Bc7 (35...Qg5 36.Qe2 Bg3+–) 36.Rc7! Qc7 Decoy theme: c7 37.Qe8 (37.Qe8 Kg7 38.b8Q Qb8 39.Qb8+–) 1–0. Rudbeck,Joergen – Nielsen,Joergen Axel, Denmark, 1967.

4.Nf3 dc4 5.Nc3 g6 6.Ne5 Be6 7.e4 Qd4 8.Nf3 Bg4 (8...Qd6 9.Bb2 Bg7 10.Qc2=) 9.h3 (better is 9.Nd4!? Bd1 10.Ne6 fe6 11.Kd1+/–) 9...Bf3+= 10.Qf3 a4 11.Bb2 (better is 11.e5 Qe5 12.Be2=) 11...a3–/+ 12.Bc1 Nf6 13.Be2 Bh6?? Exerts pressure on the backward pawn (13...e6 14.Bc4 Bg7 15.Bd3+=) 14.0–0?? (better is 14.e5 Nbd7 15.ef6 Nf6 16.Qb7+–) 14...Bd2 (better is 14...Nbd7 15.e5 Ne5 16.Qb7 0–0+=) 15.Rd1?? (better is 15.Bd2 Qd2 16.e5+– (16.Bc4?! 0–0+=)) 15...Qc3–/+ 16.Qc3?? (better is 16.Bd2 Qf3 17.gf3–/+) 16...Bc3–+ 17.Rb1 0–0 (17...Ne4!? 18.Bc4 Bd4 19.Rb3–+) 18.Bc4 Ne4 19.Bd5 Ng5 (better is 19...Nd6–+) 20.Bg5= Bf6 21.Bh6 Rd8?? (better is 21...Re8=) 22.Bb7+– e6 23.Ba8 Nd7 24.Bc6 Ne5 25.Rd8 Bd8 26.Rd1 (26.Rb3!? Nc4+–) 26...Bb6 27.Re1 Nd3 28.Re2 c4 29.Rc2 Ne5 30.Bc1 h5 (30...Bc5 31.Kf1+–) 31.Ba3 g5 32.Bd6 Nd3 33.Bg3 (better is 33.Rc4!? Bf2 34.Kf1 Bb6+–) 33...h4 34.Bh2 Bf2 (34...Nf2 35.Kf1 Nd1 36.Ke2+–) 35.Kf1 (better is 35.Rf2 g4 36.b6 Nc5+–) 35...Bd4 36.Rc4 e5 37.Be4 Nc5 38.Rd4! ed4 39.Bd5 Nd7 40.a4 Nb6 41.Bb3 Kg7 (41...Nd7+–) 42.a5 Nc8 (42...Nd7 43.Bc7 Nc5 44.a6 Nb3 45.a7 Nd2 46.Ke2+–) 43.Be5 (better is 43.b6 Ne7 44.a6 g4+–) 43...Kg6 44.Bd4 Nd6 45.b6 Nb5 46.Bc2 Kh6 47.Be3 (47.Bc5 g4 48.b7 f5 49.b8Q Kg6 50.Qg8 Kf6 51.Qf8 Kg6 52.Qf5 Kg7 53.Qf8) 47...Nd6 48.a6 Nc8 49.b7 Ne7 (49...f5 50.bc8Q Kg7 51.Qd7 Kf6 52.Bd4 Kg6 53.Bf5 Kh5 54.Qh7) 50.b8Q Nf5 (50...Kg7 51.Qe5 Kf8 52.a7 f5 53.Qf6 Ke8 54.a8Q Kd7 55.Qb7 Ke8 56.Qbe7) 51.Bf5 Kg7 52.Bg5 (52.Bd4 f6 53.Bc5 g4 54.Qf8) 52...f6 53.Qc7 Kf8 54.Bh6 Ke8 55.Qd7 1–0. aperson – The Monopoly Guy, ChessWorld.net, 2011.

4.cd5 Qd5

5.Nc3 Qd6 6.Qc2 Nf6 7.Ba3 b6 (7...e5 8.Nf3=) 8.e3 (8.Nf3 Bb7=) 8...Bb7 (8...e5 9.Nf3=) 9.d4 e5 10.dc5 bc5 11.Rd1 Qe7 (11...Qe6 12.Nf3=) 12.b6 (12.Nf3 Nbd7+=) 12...Qe6= 13.Na4 (13.Qb3 Qb3 14.ab3 Nbd7=) 13...Nbd7 14.Bc4 (worse is 14.Bc5 Rc8 (14...Nc5?! 15.Nc5 Qb6 16.Rb1 Qc5 17.Qc5 Bc5 18.Rb7=) 15.Bc4 Qc6–+) 14...Qg4 15.f3 Qh4 16.g3 Qg5 17.Ke2 (17.Qb3 Qg6=) 17...Qh5 18.Bb5 (18.Kf2!?=) 18...e4–/+ 19.Kf1 (19.Rf1 ef3 20.Nf3 Bd6–/+) 19...ef3 20.e4 0–0–0 21.Rd4? (better is 21.Bd3–/+) 21...Bc6!? 22.Bc6 cd4 23.Bd5 Nc5 24.Nc5 Nd5 25.ed5 Qd5 26.Ne6 Kd7 27.Nf8 (27.Bf8 A) 27...Qe6? 28.Bg7 Rhg8 29.Qc7 Ke8 30.b7 Rg7 31.b8Q Rb8 32.Qb8 Ke7 33.Qa7 Ke8 34.Qd4+– (34.Nf3?! Qc4 35.Kg1 Qc1 36.Kg2 Qc2 37.Kh3 Qf5 38.Kg2 Qc2 39.Kh3 Qf5 40.Kg2 Qc2=); B) 27...Ke6 28.Bg7 Rhg8=) 27...Rhf8 28.Bf8 Rf8 29.Kf2 (29.Qc7 Ke6 30.b7 f2 31.Qc8 Qd7 32.Qf8 fg1Q 33.Rg1 Qb7 34.Qe8 Kf5 35.g4 Kf4+–) 29...d3 (29...Rb8 30.Qc7 Ke6 31.Qb8 Qa2 32.Kf3 Qd5 33.Kf2 Qh1 34.b7 Qh2 35.Kf1+–) 30.Qc7 Ke6 31.Nf3 Qa2 32.Ke3 Qe2?? (32...Re8 33.Qc5 Qc2 34.Qc2 dc2+–) 33.Kf4 g5 (33...Kf6 34.Qc3 Kg6 35.Qc5+–) 34.Ng5 Kd5 (34...Kf6 35.Nh7 Kg7 36.Nf8 Qd2 37.Ke4 Qg2 38.Kd4 Qh1+–) 35.Qd7 1–0. Diener,Rudolf – Wartig,Wolfgang, corr SOK–98–129, 1999.

5.Nc3 Qd6 6.Nf3 A) 6...Nd7 7.g3 Ngf6 (7...g6 8.Bg2 Ngf6 9.0–0 Bg7 10.Ba3 0–0 11.d4 Qc7) 8.Bg2 h5 (8...g6 9.0–0 Bg7 10.Ba3 0–0 11.d4 Qc7) 9.0–0 Ne5 10.Ne5 Qe5 11.h4 a4; B) 6...Nf6 7.g3 Nbd7 (7...e5 8.Bg2 Be7 9.0–0 0–0 10.Bb2 Nbd7 11.Qc2 h6; 7...c4 8.Qa4 Nbd7 9.Ba3 Nb6 10.Bd6 Na4 11.Na4 ed6) 8.Bg2 h5 (8...g6 9.0–0 Bg7 10.Ba3 0–0 11.d4 Qc7) 9.0–0 Ne5 10.Ne5 Qe5 11.h4 a4.

5.Nc3 Qd6 6.g3 Nd7 A) 7.Bg2 Ngf6 (7...c4 8.Nf3 Ngf6 9.0–0 g6 10.Na4 Ne5 11.Bb2 Nf3; 7...e5 8.Nf3 Ngf6 9.0–0 Be7 10.Bb2 0–0 11.Qc2 h6) 8.Nf3 h5 (8...e5 9.0–0 Be7 10.Bb2 0–0 11.Qc2 h6) 9.Qb3 (9.0–0 Ne5 10.Ne5 Qe5 11.h4 a4) 9...Nb6 10.0–0 Bf5 (10...Be6 11.Qc2 Nbd5) 11.Nh4 Be6; B) 7.Nf3 Ngf6 (7...g6 8.Bg2 Ngf6 9.0–0 Bg7 10.Ba3 Qc7 11.d4 0–0) 8.Bg2 Nb6 (8...g6 9.0–0 Bg7 10.Ba3 0–0 11.d4 Qc7) 9.0–0 Bg4 10.Ng5 Qe5 11.Nge4 Rb8.

5.Nc3 Qd6 6.g3 Nf6 A) 7.Nf3 e5 (7...Nbd7 8.Bg2 g6 9.0–0 Bg7 10.Ba3 0–0 11.d4 Qc7) 8.Bb2 (8.Bg2 Be7 9.0–0 Nbd7 10.Bb2 0–0 11.Qc2 h6) 8...Be7 (8...Nbd7 9.Qc2 g6 10.Ne4 Ne4 11.Qe4 Bg7) 9.Bg2 Nbd7 10.Qc2 (10.0–0 0–0 11.Qc2 h6) 10...0–0 11.0–0 h6; B) 7.Bg2 Nbd7 (7...c4 8.Nf3 Nbd7 9.0–0 g6 10.Na4 Ne5 11.Bb2 Nf3; 7...g6 8.Nf3 Nbd7 9.0–0 Bg7 10.Ba3 0–0 11.d4 Qc7; 7...e5 8.Nf3 Be7 9.Bb2 0–0 10.0–0 Nbd7 11.Qc2 h6) 8.Nf3 c4 (8...g6 9.0–0 Bg7 10.d4 cd4 11.Qd4 Qd4) 9.0–0 g6 10.Na4 Qd5 (10...Bg7 11.Bb2 0–0) 11.Ba3 Qb5.

5.Nc3 Qh5 6.Nf3 b6 (6...Nd7 7.Bb2=) 7.e3 Bb7 8.Be2 Qg6 9.Bb2 (9.0–0!?+=) 9...Qg2= 10.Rg1 Qh3 11.Rg3 Qd7 12.Ne5 (12.Na4 Qd6 13.Rg7 Nf6+= (13...Bg7? 14.Bg7 Nd7 15.Bh8+–)) 12...Qe6 (12...Qc7 13.d4 Nf6 14.Rc1+=) 13.f4 f6?? (better is 13...Qh6 14.Bh5 g6=) 14.Bc4+– Qc8 (14...Qf5 15.Nf7+–) 15.Nf7 (better is 15.Qh5!? Kd8 16.Nf7 Kc7 17.Nh8 Nh6+–) 15...Nh6 16.Nh8 Nf5 (16...g6 17.Qb3+–) 17.Rg1 (17.Qh5 Kd8 18.Nf7 Kc7+–) 17...e6 (17...Nh6 18.Nd5 Bd5 19.Qh5 g6 20.Qd5+– (20.Bd5?! gh5 21.Ba8 Qh3=)) 18.Qg4 (18.Qh5 Kd8+–) 18...a4 (18...Ke7 19.Qh3 Nd6 20.d3+–) 19.a3 (better is 19.Qh5 Kd8 20.Qf7 Nd7 21.Be6 Ne7+–) 19...Ke7 20.Qh3 Nh6 21.Ne2 Be4 22.d3 Bf5 23.Qg2 Ra7 24.e4 Bg4 25.0–0–0 g6 26.Rd2 Bg7 27.Ng6 hg6 28.h3 Bh5 29.Ng3 Kf7 30.Nh5 (30.Nh5 g5 31.Ng7+–) 1–0. orangutanb4 (1930) – mocztenora (1870), kurnik, 2011.

5.Nc3 Qd8

6.e3 A) 6...Nd7 7.Nf3 (7.Bb2 Ngf6 8.Nf3 g6 9.Bd3 Bg7 10.Qc2 0–0 11.0–0) 7...Ngf6 8.Qc2 e6 9.Bd3 Bd6 10.0–0 0–0 11.Ba3; B) 6...Nf6 7.Nf3 Nbd7 8.Bb2 g6 9.Be2 Bg7 10.0–0 0–0 11.d4) .

6.Nf3 g6 (6...Nf6 7.g3 (7.e4 Bg4 8.h3 Bf3 9.Qf3 Nbd7 10.Qe3 Qc7 11.Be2) A) 7...Nbd7 8.Bg2 (8.Qc2 e6 9.a4 Bd6 10.Bg2 0–0 11.0–0) 8...e6 9.0–0 (9.Qc2 Bd6 10.0–0 0–0 11.a4) 9...Bd6 10.Bb2 (10.a4 0–0 11.Qc2) 10...0–0 11.Qc2 Nb6; B) 7...g6 8.Bg2 Bg7 9.0–0 (9.Ba3 Nd5 10.0–0 Nc3 11.dc3) 9...0–0 10.Qa4 (10.Ba3 Qc7 11.Rc1) 10...Nbd7 11.Qc4 Nb6; C) 7...e6 8.Bg2 Nbd7 9.0–0 (9.Bb2 Bd6 10.Qc2 0–0 11.0–0) 9...Bd6 10.Qc2 (10.Bb2 0–0 11.Qc2) 10...0–0 11.a4+/– (11.Bb2 Nb6)) 7.Ba3 (7.e3 A) 7...Nd7 8.Qb3 (8.Bb2 Ngf6 9.Bd3 Bg7 10.Qc2 0–0 11.0–0) 8...Ngf6 9.Bc4 e6 10.Bb2 Bg7 11.Bd3+= (11.0–0 0–0); B) 7...Bg7 8.Bc4 (8.Ng5 Nf6 9.Bc4 0–0 10.Qb3 e6 11.0–0) 8...Bc3 9.dc3 Qd1 10.Kd1 Nf6 11.a4+= (11.Ba3 Bg4); 7.Ng5 h6 8.Nge4 Nf6 9.Nf6 ef6 10.g3 Nd7 11.Bg2) 7...b6 (7...Nd7 8.d4 (8.e3 Ngf6 9.Be2 Bg7 10.0–0 0–0 11.d4) 8...e6 9.Ne4 (9.g4 Ngf6 10.g5 cd4 11.Bf8) 9...Ngf6 10.Nf6 Qf6 11.g4 Bg7) 8.e3 (8.e4 Bg7 9.Bc4 Nf6 10.Ng5 0–0 11.e5) 8...Bg7 (8...Nf6 9.Bc4 (9.d4 Nbd7 10.dc5 e6 11.Na4) 9...Nbd7 10.0–0 (10.d4 Qc7 11.Nd5) 10...e6 11.Qe2 Bb7) 9.Bc4 (9.Ng5 Bb7 10.Be2 Nf6 11.Qb3) 9...Nf6 (9...Bc3 10.dc3 Qd1 11.Rd1 Nf6) 10.d4 (10.Ne5 0–0 11.0–0 Bb7) 10...cd4 (10...0–0 11.dc5) 11.ed4 (11.Nd4 0–0) 11...0–0 (11...Bg4+/–) 12.Ne5 Bb7 13.0–0 Ne4? (better is 13...Ra7+=) 14.Nf7 Rf7 15.Bf7 Kf7 16.Qf3 Kg8 17.Ne4 Qd4 (17...Qd7+–) 18.Nf6!! Bf6 (18...Qf6 19.Qb7 Discovered attack; 18...ef6 19.Qb7 Discovered attack; 18...Bf6 19.Qb7 Discovered attack) 19.Qb7 1–0. mrkt – chyl1, internet, 2011.

6.g3 Nd7 7.Nf3 (7.Bg2 g6 8.Nf3 Ngf6 9.0–0 Bg7 10.d4 0–0 11.Ba3) 7...Ngf6 8.Qc2 e6 9.Bg2 Bd6 10.a4 0–0 11.0–0.

6.g3 Nf6 7.Nf3 (7.Bg2 g6 8.Nf3 Bg7 9.0–0 0–0 10.Bb2 Qb6 11.d4; 7.a4 g6 8.Nf3 Bg7 9.Bg2 0–0 10.0–0 Nbd7 11.Ba3; 7.Ba3 Nbd7 8.Nf3 e6 9.Bg2 Bd6 10.0–0 0–0 11.d4) 7...g6 8.Bg2 Bg7 9.0–0 0–0 10.Ba3 Nbd7 11.Rc1.

6.g3 g6 7.Ba3 A) 7...Nd7 8.Nf3 (8.Bg2 Bg7 9.Nh3 Nh6 10.0–0 0–0 11.Nf4) 8...Ngf6 9.Bg2 Bg7 10.Qc2 (10.Rc1 0–0 11.0–0) 10...0–0 11.0–0 Qc7; B) 7...Nf6 8.Nf3 Nbd7 9.Bg2 Bh6 (9...Qc7 10.0–0 Bg7 11.d4) 10.0–0 0–0 11.Na4+/– (11.Qa4 Qc7).

6.g3 g6 7.Qa4 A) 7...Nd7 8.Nf3 Ngf6 (8...Bg7 9.Ba3 Nh6 10.Bg2 Nf5 11.0–0) 9.Bg2 (9.Qc4 Nb6 10.Qc5 Bg7 11.Bg2) 9...Nb6 10.Qa3 e6 11.0–0 Bd6; B) 7...Bg7 8.Nf3 (8.Bg2 Nd7 9.Nf3 Ngf6 10.0–0 Nb6 11.Qa3) 8...Nd7 (8...Nf6 9.Bg2 Nbd7 10.0–0 Nb6 11.Qa3) 9.Bg2 Ngf6 10.0–0 Nb6 11.Qa3 Qd6; C) 7...Nh6 8.Nf3 Nd7 (8...Bg7 9.Bg2 0–0 10.Ba3 Nd7 11.Qc4) 9.Bg2 (9.Bb2 Bg7 10.Bg2 Nb6 11.Qf4) 9...Bg7 10.0–0 0–0 11.Qc4 Nf5; D) 7...Nf6 8.Nf3 Nbd7 9.Bg2 (9.Qh4 Nb6 10.Ba3 Bg4 11.Ne5) 9...Bg7 (9...Nb6 10.Qa3 e6 11.0–0) 10.0–0 (10.Qc4 Nb6 11.Qc5) 10...Nb6 11.Qa3 Qd6.

6.g3 g6 7.Bb2 Nf6 8.Nf3 Bh6 9.Bg2 0–0 10.Na4 Nbd7 11.0–0.

6.g3 g6 7.Nf3 A) 7...Bg7 8.Bg2 Nf6 9.0–0 (9.Ba3 Nbd7 10.Rc1 0–0 11.0–0) 9...0–0 10.Bb2 (10.Ba3 Nbd7 11.Rc1) 10...Nbd7 (10...Qb6 11.d4) 11.Na4 Nd5; B) 7...Nf6 8.Bg2 Bg7 9.Ba3 (9.Bb2 0–0 10.Na4 Nbd7 11.0–0) 9...Qc7 (9...Nbd7 10.Rc1 0–0 11.0–0) 10.d4 (10.0–0 0–0 11.Rc1) 10...Nbd7 (10...0–0 11.Rc1) 11.Rc1+/– (11.0–0 0–0).

6.g3 g6 7.Bg2 A) 7...Nf6 8.Ba3 (8.Nf3 Bg7 9.0–0 0–0 10.Ba3 Qc7 11.Rc1) 8...Qd6 (8...Qc7 9.Nf3 Bg7 10.d4 0–0 11.Rc1) 9.Nf3 Bh6 (9...Bg7 10.0–0 0–0 11.d4) 10.d4 (10.0–0 0–0 11.Na4) 10...Nbd7 11.0–0 0–0; B) 7...Bg7 8.Ba3 (8.Nh3 Nd7 9.0–0 Ngf6 10.Ba3 0–0 11.Nf4) 8...Nd7 9.Nf3 (9.Qb3 Ngf6 10.Nf3 Qc7 11.Qc4) 9...Ngf6 10.0–0 (10.d4 c4 11.0–0) 10...0–0 11.Rc1+/– (11.Qb3 Qc7).

6.g3 g6 7.Nh3 A) 7...Nd7 8.Ng5 Ngf6 (8...h6 9.Nf3 Ngf6 10.Bg2 Bg7 11.0–0) 9.Qb3 e6 10.Bg2 Be7 11.0–0 0–0; B) 7...Nf6 8.Bg2 (8.Ng5 h6 9.Nf3 Bg7 10.Bg2 Be6 11.0–0) 8...Nbd7 9.Ba3 (9.Ng5 Bg7 10.0–0 0–0 11.Ba3) 9...Bh6 10.Nf4 (10.0–0 0–0 11.f4) 10...0–0 11.Rc1+= (11.Qb3 Qc7).

4.e3 e5

5.a4 f5 6.Bb2 d4 =.

5.a4 f5 6.Bd3 dc4 7.Bc4 Nh6 8.d3 Bd7 9.Nf3 Nf7 10.0–0 e4 11.de4 fe4 12.Nfd2 Bf5 13.Bb2 Rg8 14.Nc3 Qh4 15.Qb3 Bg6 16.Bd5 c4 17.Qc4 (worse is 17.Nc4 Rh8+–) 17...Nd7 18.Bb7 (worse is 18.Be4 Be4 19.Nde4 Qh6+–) 18...Rb8 19.Be4 Nde5 (19...Bd6 20.Qe6 Kd8+–) 20.Bc6 Nc6 21.Qh4 (21.Qh4 Be7 22.Qc4+–; 21.bc6?! Qc4 22.Nc4 Rb4 23.Na5 Rb2+–) 1–0. Bonetti,Shane – Kibitz, 2000.

5.a4 f5 6.Bd3 dc4 7.Bc4= Nh6 (7...Nd7 8.d3=) 8.d3 Bd7 (8...Qg5 9.Qf3=) 9.Nf3 Nf7? (9...Bd6 10.Bd5 Qf6 11.e4+/– (worse is 11.Bb7 Ra7+=)) 10.0–0 (10.Bf7 Kf7 11.Ne5 Ke6+–) 10...e4? (10...Bd6 11.Qb3 Ng5 12.Ng5 Qg5 13.Bf7 Ke7 14.Bd5+/–) 11.de4 (better is 11.Bf7 Kf7 12.de4+–) 11...fe4?? (11...Nd6 12.Ne5 fe4 13.Bb2+/–) 12.Nfd2 (better is 12.Bf7 Kf7 13.Qd5 Ke8 14.Qe4 Be7 15.Qb7+–) 12...Bf5+/– 13.Bb2 Rg8? (better is 13...Nd7+/–) 14.Nc3 Qh4 (14...Bd6 15.Bd5+– (15.Nde4?! Be4 16.Bf7 Kf7+/–; 15.Nce4?! Bh2 16.Kh2 Be4+–)) 15.Bf7 (15.Nde4!? Bg6 16.Nd5 Qe4 17.Nc7 Ke7+–) 15...Kf7 16.Nf3! ef3 17.Qd5 (17.Qf3 Kg6 18.Qb7+–) 17...Ke8?? (17...Kg6 18.gf3 Nc6–/+) 18.Qf5+– (18.Qg8?? Qg4 19.g3 Qh3 20.Qf8 Kf8 21.Rfd1 Qg2) 18...fg2 (18...Be7 19.Nd5 Bd8 20.Qe6 Kf8 21.Be5+–) 19.Kg2 (better is 19.Rfd1 Qf6 20.Qc8 Kf7 21.Qb7 Be7 22.Nd5+–) 19...Be7 20.Qc8 (better is 20.Nd5!? Qg5 21.Qg5 Bg5 22.Nc7 Ke7 23.Na8 Nd7+–) 20...Kf7 21.Qb7 Qg4 22.Kh1 Nd7 23.Qd5 Qe6 24.Qh5 Qg6 25.Qg6 Kg6 26.Rg1 Kf7 27.Nd5 Nf6 (27...Bf6 28.Bf6 gf6 29.Rac1+–) 28.Ne7 Ke7 29.Rab1 (29.Rg5 Rac8+–) 29...c4 (29...Ne4 30.f3 (30.Rg7?! Rg7 31.Bg7 Rg8+/–; 30.Bg7?! Kf7=) 30...Nf2 31.Kg2+–) 30.Bf6 (30.Rbc1!? Rac8 31.Rc2 Rc7+–) 30...Kf6 (30...gf6 31.Rgc1 Rac8 32.h3+/–) 31.b6 Rgb8 ½–½. Player – Player, 2000.

5.a4 f5 6.Bd3 Nf6 7.Be2 +=.

5.a4 Nf6 6.cd5 Qd5 7.Bb2 +=.

5.Bb2 d4 6.ed4 cd4 7.d3 (7.Qe2!? Qe7 8.f4 ef4 9.Nf3+=) 7...Be6 8.g3 Bb4 9.Nd2 Nd7 10.Bg2 (10.a3 Bd2 11.Qd2 Ngf6=) 10...Nc5–/+ 11.a3?? (better is 11.Qe2–/+) 11...Nd3–+ 12.Ke2 Nb2 13.Qb3 (13.Qc1 Bd2 14.Kd2 Nc4 15.Ke1 d3–+) 13...Bd2 (13...Bd2 14.Qb2 Bc3–+) 0–1. Hal1958 – Quim, playchess.de, 2002.

5.Bb2 d4 6.ed4 cd4 7.Nf3 Bg4 8.d3 Bb4 9.Nbd2 Nd7 10.Be2 Nc5 (better is 10...Nh6=) 11.Ne5+/– Bf5 12.0–0 Qg5 (better is 12...Qd6!? 13.Ndf3 Ne6+/–) 13.Ndf3+– (13.Bd4?! Qd2 14.Qd2 Bd2 15.Bc5 Bc3+–) 13...Qf6 14.Bd4 Ne6 15.Bb2 Rd8 16.a3 Bd6 17.Qc1 Ne7? (17...Qh6 18.Qh6 Nh6+/–) 18.Nc6 Qg6 19.Nd8 (19.Nh4 Nf4 20.Bf3 Nd3 21.Nd8 Bh2 22.Kh2 Qd6 23.Kg1 Nc1 24.Nb7 Qc7 25.Nf5 Ne2 26.Be2 Nf5+–) 19...Kd8?? (19...Nf4 20.Qf4 Bf4 21.Nb7 Qb6 22.Na5 Qa5 23.Bg7 Rg8+=) 20.Ne5 Be5 21.Be5 Bh3 22.Bg3 Nf4 (22...h5 23.Qd2 h4 24.Qa5 Kd7 25.gh3 hg3 26.fg3 Rh3+–) 23.Qf4 (23...Be6 24.Qc7 Ke8 25.Qb7+–) 1–0. hal1958 – golddim, playchess.de, 2003.

5.Bb2 d4 6.Be2 Nf6 =.

5.Bb2 d4 6.Ne2 Bd6 7.e4 (7.Ng3 Nf6+=) 7...Nh6 8.g3 (8.Ng3 0–0+=) 8...0–0 9.Bg2 Ra7 (9...Bg4 10.Qc2–/+) 10.d3 b6 (10...Bg4 11.0–0+=) 11.Nd2 Be6 12.Qc2 a4 13.a3 Be7 14.h3 f5 (14...Bd6 15.0–0–0=) 15.0–0–0 Nd7 16.Rdf1 fe4 17.Ne4 Nf5 18.Kb1 Nd6 19.g4 (19.Nd6 Bd6 20.f4 ef4 21.Nf4 Bf4 22.Rf4 Rf4 23.gf4 Nf6=) 19...Ra5 (19...Ne4 20.Be4 Bg5 21.Bc6=) 20.Nd6 Bd6 21.Ng3 e4 (21...Be7!?+=) 22.Ne4+/– (22.de4? Ne5 23.Rd1 Bc4–+) 22...Bf4 23.Bc1 Ne5 (23...Qc7 24.Ng5 Bg5 25.Bg5+–) 24.Bf4 Rf4 25.Qd2 Qf8 26.Ng5 Nc4 27.dc4 Bc4 The backward pawn on f2 becomes a target 28.Re1 (28.Bc6 Bf1 29.Rf1+/–) 28...Rb5–/+ 29.Ka1 g6?? (29...Rb3!? 30.Qf4 Ra3 31.Kb1 Qf4 32.Re8 Qf8 33.Rf8 Kf8 34.Nh7 Ke7+=) 30.Ne4 (better is 30.Qc1 d3 31.Re8 Qe8 32.Qf4+–) 30...Rb3= 31.Bf1?? (31.Qc1 Bd3 32.Nd2–+) 31...Ra3 (31...d3 32.Nc3 Rf2–+ (worse is 32...Ra3 33.Kb2 Rf2 34.Be2 Rb3 35.Ka1 de2 36.Rhg1–+)) 32.Kb1–/+ Rb3 33.Ka1 (better is 33.Kc1 Bf1 34.Rhf1–+) 33...Bd5 34.Rh2 (34.Bd3 c4 35.Bb1 Ra3 36.Ba2 Be4–+) 34...c4 (34...Re4 35.Rd1 d3 36.f4 Qg7 37.Ka2 Rb2 38.Ka3 Rd2 39.Rb1 Qc3 40.Rb3 Qb3; 34...Be4?! 35.Bc4 Kg7 36.Bb3 ab3 37.Kb2–+) 35.Bc4 (35.f3 Ra3 36.Kb1 Raf3 37.Bc4 Bc4 38.Kc2–+) 35...Bc4 36.Qd4 (36.Nc5 bc5 37.Qc1–+) 36...Qa3 0–1. Johnson,Kyle – Rutkofske,L, USA–op Dearborn, 1992.

5.cd5 Qd5 6.Bb2 Nf6 =.

5.cd5 Nf6 6.d4 ed4 7.Bc4 =.

3.c4 e5

4.Bb2 d6 5.e3 Bf5 6.Nc3 (6.Qf3 Qd7=) 6...Nf6 7.d3 (7.d4 cd4 8.ed4 ed4 9.Qd4 Qe7 10.Kd2 Nbd7+=) 7...Be7 8.Nf3 (8.Qf3 Qd7=) 8...0–0 9.Be2 Nbd7 10.Nd2 (10.0–0 Re8=) 10...Nb6 (10...Re8 11.0–0 Qc7 12.f4+=) 11.Na4 (11.e4 Be6=) 11...Qc7 (11...Re8 12.Nb6 Qb6 13.0–0=) 12.Nb6 (12.0–0 Na4 13.Qa4 d5=) 12...Qb6 13.e4 (13.0–0 a4=) 13...Be6 14.0–0 Nd7 15.Bg4 (15.f4 f5=) 15...f5 16.Bh3 (16.ef5 Bf5 17.Qf3 Bg6=) 16...Rf6 (16...Bg5 17.Re1+=) 17.ef5 (17.f4 Raf8=) 17...Bf5 18.Ne4 (18.Bf5 Rf5 19.Qg4 Raf8=) 18...Rf7+= 19.Bf5 Rf5 20.Qg4 g6 (20...Raf8 21.Ng3 h5 22.Qh3+–) 21.Ng3 (21.f4 Raf8+=) 21...Nf6 22.Qh3 Rf4 23.Qe6 Kf8 24.Be5! (24.Be5 g5 25.Ne2+–) 1–0. Franke,Roland – Eberth,Manfred, Bahn–chV Bad Laasphe, 1994.

4.Bb2 d6 5.e3 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 c5).

4.Bb2 d6 5.g3 f5 (5...Nf6 6.Bg2+=) 6.Bg2 (6.Bh3 Nh6+=) 6...Nf6+= 7.Nc3 Be7 8.e3 0–0 9.Nge2 Ra7 (9...Nbd7 10.d3=) 10.Nd5 b6 11.Nec3 Nbd7 12.0–0 Nd5 13.Nd5 (worse is 13.cd5 e4=) 13...Nf6 14.d4 (14.Qc2 Be6+=) 14...e4 (14...cd4 15.ed4 e4 16.Ne7 Qe7 17.Rc1+=) 15.Nf4+= g5 16.Ne2 Be6 17.d5 Bf7 18.f3 ef3 19.Bf3 Bg6 20.Qd2 Nd7 21.Nc3 (21.e4 Bf6 (worse is 21...fe4 22.Bg4 Bf6 23.Be6 Kg7 24.Rf6 Rf6 25.Qg5+/–) 22.Bf6 Rf6 23.ef5 Rf5=) 21...Ne5+= 22.Be2 Bf6 23.Rae1 Raf7 24.Nd1 (24.Na4 f4 25.ef4 gf4 26.Be5 Be5–+) 24...h6 (24...f4!? 25.ef4 gf4–/+) 25.Be5 Be5 26.Bd3 Rf6 27.Nf2 (27.Qc2 Kg7=) 27...Qd7+= 28.Kg2 Kg7 (28...Qg7 29.Kh1+=) 29.Nh3= R8f7 ½–½. Grabmeier,Johannes (1905) – Kleibel,Uwe (1640), 2rd Deggendorf Germany, Open, 2008.

4.Nc3 f5 5.e4 d6 6.ef5 Bf5 7.Qf3 Bc8 8.Bd3 Qf6? (better is 8...Nf6=) 9.Nd5+– Qf3 10.Nf3 (10.gf3?! Kd8=) 10...Ra7 11.b6 (11.b6 Ra6 12.Nc7 Ke7 13.Na6 Na6 14.Be4+–) 1–0. pcmvr (2860) – vsahs (2465), net–chess.com, 2011.

3.c4 e6

4.Bb2 d5 5.e3 Nf6 6.Nf3 b6 7.d4 Bb7 8.Nbd2 Nbd7 9.dc5 Bc5 10.Nd4 (10.Bd3 Bd6=) 10...0–0 11.g4 (better is 11.Be2!?+=) 11...dc4 12.Rg1 c3 (12...Bb4!? 13.Bc4 Ne5–+) 13.Bc3–/+ Nd5 14.Bb2 Ne3 (better is 14...Rc8–/+) 15.Qb3? (better is 15.fe3 Qh4 16.Rg3+=) 15...Nf1–+ 16.Kf1 Bd5 (16...Bd5 17.Qg3 Rc8–+). Pietrzak,Wojciech – Skladzien,Romuald, Warszawa, 2000.

4.Bb2 Nf6 5.Nf3 b6 6.e3 Bb7 7.Be2 Be7 8.Nc3 d6 9.Qc2 Nbd7 10.d3 0–0 11.0–0 Rc8 12.Nd2 Qc7 13.f4 Bd8 14.g4 h6 15.h4 Nh7 16.g5 hg5 17.hg5 (< 17.fg5 d5 18.Rf3 dc4=+) 17...Ng5 18.fg5 Bg5 19.Nd1 d5 20.Rf2 Bh4 21.Rg2 d4 22.Bf3 e5 23.e4 Rce8 24.Bg4 Bc8 25.Nf3 Qd8 26.Qd2 Qf6 27.Nf2 Bf2 28.Qf2 Qf4 29.Bc1 Qf6 30.Qg3 (30…Qg6 31.Bd7 Bd7 32.Qh2+– (32.Qg6?! fg6 33.Kf2 Kf7+–)) 1–0. Franke,Roland (1895) – Hansen,Dirk (1905), Gmuend tt, 1999.

4.e3 d5 5.Nf3 Nf6 6.d4 cd4 7.Qd4 Nbd7 8.Bb2 Bc5 9.Qf4 0–0 10.Nbd2 e5 (better is 10...Qb6!?=) 11.Ne5+/– (worse is 11.Be5 Ne5 12.Ne5 Re8=) 11...Bd6 (11...Ne5 12.Be5 Ng4 13.Be2 Ne5 14.Qe5+/–) 12.Nf7 Bf4 13.Nd8 Be5 14.Be5 Ne5 15.Nb7 The passed pawn on b5 will become decisive later 15...Bb7 16.c5 The passed pawn on c5 will become decisive later 16...Bc8 (16...Rac8 17.c6 Bc6 18.bc6 Rc6 19.h3+=) 17.a4 (17.Be2!?+/–) 17...Nfg4 18.Nf3 Nf3 19.gf3 Rf3 20.Bg2 Rf5 21.0–0 Rb8 22.h3 Nf6 23.Rfc1 Kf8 24.b6 Rg5 25.Kh1 Bf5 26.Ra2 Ng8 (26...Rh5!?=) 27.Rb2 Ne7 28.Rb5 (28.Kh2 Bd7+=) 28...Bd3= 29.Ra5 Nc6 30.Rb5 Bb5 31.ab5 Ne7 32.Rd1 The isolani on d5 becomes a target 32...Rf5 33.Kg1 Ke8 34.Rd2 g5 35.Bf1 h6 36.Be2 Re5 37.Bf3 Kd8 (37...Kf7 38.Kg2+=) 38.Ra2 (38.e4 h5=) 38...Nc8+= 39.Ra6 Nb6 ½–½. Taulien,Hans_Juergen (2350) – Skorna,Ullrich (2350), remoteschach.de, 2004.

4.e4 d6 5.Nc3 Be7 (6.Nf3 Nd7=). Ridgereeno – PassedPawn, ChessWorld.net, 2005.

3.c4 f6

4.Bb2 A) 4...d6 A1) 5.Nf3 Nd7 (5...Nh6 6.Nc3 Nd7 7.e3 e6 8.Bd3 Be7 9.Qc2 Nf7 10.Bh7 Nde5) 6.e3 Nh6 7.Nc3 e6 8.Bd3 Be7 9.Qc2 Nf7 10.Bh7 Nde5; A2) 5.e3 Nd7 (5...Nh6 6.Nf3 Nd7 7.Nc3 e6 8.Qc2 Be7 9.Bd3 Nf7 10.Bh7 Nde5; 5...Bf5 6.Nc3 Nd7 7.Nf3 Nh6 8.Be2 a4 9.a3 e5 10.0–0 Be7; 5...Be6 6.Nc3 Nd7 7.Nf3 Nb6 8.d3 Nh6 9.Be2 d5 10.cd5 Nd5) 6.Nf3 Nh6 7.Nc3 e6 8.Qc2 Be7 9.Bd3 Nf7 10.Bh7 Nde5; A3) 5.Nc3 a4 (5...Nd7 6.Nf3 Nh6 7.e3 e6 8.Bd3 Be7 9.Qc2 Nf7 10.Bh7 Nde5; 5...Nh6 6.Nf3 Nd7 7.e3 e6 8.Bd3 Be7 9.Qc2 Nf7 10.Bh7 Nde5; 5...Be6 6.e3 Nd7 7.Nf3 Nb6 8.d3 Nh6 9.Be2 d5 10.cd5 Nd5) 6.Nf3 a3 7.Bc1 Nh6 8.Qb3 Nd7 9.Ba3 Ne5 10.Bb2 Bf5; B) 4...a4 B1) 5.Qc2 d6 (5...Nh6 6.Nf3 d6 7.a3 Nd7 8.Nc3 Ne5 9.Ne5 de5 10.e3 Bf5) 6.Nf3 Nd7 7.e3 Ne5 8.Be5 fe5 9.Nc3 Nf6 10.Bd3 g6; B2) 5.e3 d6 (5...Nh6 6.Ne2 d6 7.Nf4 Bf5 8.Bd3 Bd3 9.Nd3 Nd7 10.0–0 g6) 6.Bd3 Nh6 7.Nf3 Nd7 8.0–0 g6 9.Nc3 a3 10.Bc1 Ng4; B3) 5.Nh3 d6 (5...Nh6 6.e3 g6 7.Nf4 Bg7 8.a3 0–0 9.Nc3 d6 10.Be2 e5) 6.Nf4 e5 7.Nd5 Ne7 8.Nbc3 Be6 9.a3 Nd7 10.e4 Nd5; C) 4...e6 C1) 5.e3 d5 (5...Ne7 6.Nc3 d5 7.Nh3 Qd6 8.cd5 Nd5 9.Ne4 Qe7 10.Bd3 Nd7) 6.cd5 ed5 7.Nh3 Bf5 8.Nf4 Ne7 9.g4 Be4 10.f3 Bg6; C2) 5.Nc3 d6 (5...Nh6 6.Nf3 d6 7.Qc2 Be7 8.g3 Nd7 9.Bg2 Ne5 10.Ne5 de5) 6.f4 Nd7 7.e3 Ne7 8.Nf3 Nb6 9.Ne4 Ng6 10.Qc2 e5; C3) 5.Nh3 f5 (5...Ne7 6.Nc3 Ng6 7.e3 Be7 8.Qh5 0–0 9.Bd3 f5 10.0–0 Ne5; 5...Bd6 6.Nc3 Ne7 7.Ne4 Qc7 8.Nd6 Qd6 9.e3 e5 10.Rc1 0–0) 6.Nc3 Nf6 7.g3 d6 8.Nf4 Kf7 9.Bg2 Nbd7 10.0–0 Ne5; C4) 5.e4 Ne7 (5...d6 6.Nf3 Nd7 7.Nc3 Ne5 8.Be2 Ne7 9.0–0 N7g6 10.g3 Kf7; 5...Kf7 6.Nc3 d6 7.Nh3 Nd7 8.f4 Ne7 9.Bd3 b6 10.0–0 Bb7) 6.Nc3 d6 7.Nf3 Nd7 8.Be2 Kf7 9.0–0 Ng6 10.d4 Nf4; C5) 5.Nf3 Ne7 (5...d5 6.e3 Ne7 7.Nc3 Nd7 8.cd5 Nd5 9.Bd3 Bd6 10.Qb1 g6; 5...d6 6.e3 Nh6 7.Bd3 Nd7 8.0–0 Be7 9.Qc2 Ng4 10.Nc3 f5; 5...Nh6 6.Nc3 d6 7.g3 Nd7 8.Bh3 Ne5 9.Qb3 Be7 10.Ne4 a4; 5...Be7 6.Nc3 Nh6 7.Qc2 d6 8.e3 0–0 9.Bd3 f5 10.0–0 Nd7; 5...Kf7 6.Nc3 d5 7.e3 Ne7 8.Bd3 Nd7 9.cd5 ed5 10.0–0 Nb6) 6.Nc3 d5 7.Qb3 Qd6 8.e3 Nd7 9.Be2 Nb6 10.cd5 ed5; D) 4...Nh6 D1) 5.Nf3 d6 (5...a4 6.d3 d6 7.Nc3 a3 8.Bc1 Nd7 9.Qb3 Ng4 10.g3 Qa5) 6.Nc3 Nd7 7.e3 e6 8.Bd3 Be7 9.Qc2 Nf7 10.Bh7 Nde5; D2) 5.Nc3 d6 6.Nf3 Nd7 7.e3 e6 8.Qc2 Be7 9.Bd3 Nf7 10.Bh7 Nde5.

4.Qc2 A) 4...Nh6 5.Nc3 (5.Nf3 d6 6.Nc3 Nd7 7.e3 e6 8.Bb2 Be7 9.Bd3 Nf7 10.Bh7 Nde5; 5.Bb2 d6 6.Nf3 Nd7 7.e3 g6 8.Nc3 Bg7 9.Be2 0–0 10.Ne4 Ne5) 5...d6 6.Nf3 Nd7 7.Bb2 Ne5 8.Ne5 de5 9.e3 Bf5 10.e4 Bg6; B) 4...d6 B1) 5.Nc3 Nd7 (5...Nh6 6.Nf3 Nd7 7.Bb2 Nb6 8.e3 Bf5 9.e4 Bg4 10.Be2 Bf3) 6.Nf3 Ne5 7.e3 Nf3 8.gf3 e5 9.Bd3 Ne7 10.Bb2 Be6; B2) 5.Nf3 Nd7 (5...Nh6 6.Nc3 Nd7 7.Bb2 Ng4 8.e3 g6 9.Be2 Bg7 10.h3 Nge5) 6.Nc3 Nh6 7.Bb2 Nf7 8.e3 e6 9.Be2 Be7 10.d4 0–0.

4.Nc3 A) 4...d6 A1) 5.e4 Nh6 6.Nf3 g5 7.h3 Nd7 8.Be2 Bg7 9.Ba3 0–0 10.0–0 Ne5; A2) 5.e3 Nh6 (5...Nd7 6.Nf3 Nh6 7.Bb2 e6 8.h3 Be7 9.Bd3 Ne5 10.Ne5 de5) 6.Nf3 Nd7 7.Be2 e6 8.Qc2 Be7 9.0–0 0–0 10.d4 Qc7; A3) 5.Bb2 Nd7 (5...Nh6 6.Nf3 Nd7 7.e3 e6 8.Bd3 Be7 9.Qc2 Nf7 10.Bh7 Nde5; 5...a4 6.Nf3 a3 7.Bc1 Nh6 8.Qb3 Nd7 9.Ba3 Ne5 10.Bb2 Bf5) 6.Nf3 Nh6 7.e3 e6 8.Bd3 Be7 9.Qc2 Nf7 10.Bh7 Nde5; A4) 5.Nf3 Nh6 (5...Nd7 6.e4 Ne5 7.Be2 Bg4 8.Ne5 Be2 9.Qe2 de5 10.0–0 e6; 5...Be6 6.e3 Nd7 7.Be2 Nh6 8.0–0 g5 9.d4 Bg7 10.h3 0–0) 6.e4 g5 7.h3 Nd7 8.Be2 Bg7 9.0–0 0–0 10.Ba3 Ne5; B) 4...Nh6 5.Nf3 d6 6.e4 g5 7.h3 Nd7 8.Bb2 Bg7 9.Be2 0–0 10.Qc2 Ne5.

4.e3 d6 A) 5.Nc3 Nh6 (5...Nd7 6.Bb2 Nh6 7.Nf3 e6 8.Bd3 Be7 9.Qc2 f5 10.Ne2 0–0) 6.Nf3 Nd7 7.Bb2 e6 8.Qc2 Be7 9.Bd3 f5 10.Ne2 0–0; B) 5.Nf3 Nd7 (5...Nh6 6.Nc3 Nd7 7.Bb2 e6 8.Bd3 Be7 9.0–0 0–0 10.Qe2 Nf5; 5...Bf5 6.Nc3 Nd7 7.Be2 Nh6 8.0–0 Kf7 9.e4 Bg4 10.d4 Qc8; 5...Bg4 6.h3 Bf5 7.Nc3 Nd7 8.Be2 Ne5 9.0–0 Nh6 10.d4 Nf3) 6.Nc3 Nh6 7.Bb2 e6 8.Bd3 Be7 9.Ne2 Ne5 10.Ne5 de5; C) 5.Be2 Be6 6.Nc3 Nd7 7.Nf3 Nh6 8.0–0 g5 9.d4 Bg7 10.h3 0–0; D) 5.Bb2 Nh6 (5...Bf5 6.Nc3 Nd7 7.Nf3 Nh6 8.Be2 a4 9.a3 e5 10.e4 Be6) 6.Nc3 Nd7 7.Nf3 Ng4 8.Be2 a4 9.Na4 Qa5 10.Nc3 Nde5.

4.e3 e5 A) 5.Nf3 Ne7 (5...d5 6.cd5 e4 7.Nh4 Nh6 8.Nc3 g5 9.Qh5 Nf7 10.Bb2 gh4) 6.Nc3 d5 7.Bb2 Be6 8.Qb3 Kf7 9.cd5 Nd5 10.Bc4 a4; B) 5.Ba3 f5 6.Nc3 Nf6 7.Qc2 d6 8.Be2 Be7 9.Nf3 e4 10.Ng5 h6; C) 5.Nc3+= Ne7 6.Ba3 d6 7.Nf3 Be6 8.Ne4 h6 9.d4 f5 10.Nd6 Qd6.

4.e3 e6 5.Ba3 d6 (5...Nh6 6.Nc3 d6 7.Bd3 Nd7 8.Nf3 Ng4 9.Qc2 Kf7 10.Be2 Qb6; 5...Ne7 6.Nc3 d6 7.Nf3 Nd7 8.Be2 Ng6 9.0–0 Be7 10.d4 0–0; 5...Bd6 6.Nf3 f5 7.d4 Qc7 8.Nc3 Nf6 9.b6 Qb6 10.Na4 Qd8; 5...f5 6.Nc3 Nf6 7.Nf3 Be7 8.Bd3 0–0 9.h4 Qc7 10.0–0 Ng4; 5...Be7 6.Nc3 f5 7.Bd3 Nf6 8.Nge2 0–0 9.0–0 d5 10.cd5 Nd5; 5...Qc7 6.Nc3 Be7 7.Bd3 f5 8.f4 Nf6 9.Nf3 0–0 10.0–0 d6) 6.Nf3 Nh6 7.Nc3 Nd7 8.h3 Be7 9.Bd3 Nf7 10.0–0 Nde5.

4.e3 e6 5.Nc3 Nh6 (5...d6 6.Ba3 Nd7 7.f4 Nh6 8.Nf3 Nb6 9.Bd3 Be7 10.0–0 0–0; 5...Ne7 6.Be2 d5 7.Nf3 Nd7 8.d3 Kf7 9.0–0 Nb6 10.Bd2 Bd7) 6.Nf3 d6 7.d4 Nd7 8.Bd3 Be7 9.Qc2 f5 10.0–0 0–0.

4.e3 e6 5.Bd3 g6 (5...Ne7 6.Bb2 (6.Nf3 d5 7.Nc3 Nd7 8.0–0 Nb6 9.cd5 Ned5 10.Bb2 c4) 6...e5 (6...d5 7.Nh3 Qd6 8.Nc3 Nd7 9.f4 Nb6 10.cd5 ed5) 7.f4+= (7.Nc3 d5 8.cd5 Nd5 9.Qh5 g6 10.Bg6 hg6) 7...ef4 8.Nc3 fe3 9.de3 d6 10.Nf3 Be6; 5...f5 6.Nf3 Nf6 7.Nc3 Be7 8.Bb2 0–0 9.0–0 d6 10.e4 Nbd7; 5...Nh6 6.Nc3 d6 7.f4 Nd7 8.Bb2 Nb6 9.Nf3 Bd7 10.Qc2 Be7) 6.h4 (6.Nf3 d5+= (6...Nh6 7.Nc3 d6 8.0–0 Nd7 9.Bb2 Ng4 10.Be2 Be7) 7.Nc3 Ne7 8.Bb2 Nd7 9.0–0 Nb6 10.Qe2 Bg7; 6.Nc3 Nh6 7.Nf3 d6 8.Qc2 Nd7 9.0–0 Bg7 10.Bb2 0–0) 6...Bg7 (6...d5 7.h5 (7.Nc3 Ne7 8.Nf3 Nd7 9.cd5 ed5 10.h5 c4) 7...g5 (7...Nh6 8.hg6 dc4 9.Bc4 hg6 10.Nf3 Kf7) 8.Qc2+= (8.Bb2 Nd7 9.Nf3 d4 10.ed4 g4) 8...Nd7 9.Bh7 Ne7 10.Bb2 Qc7) 7.Bb2+= (7.Nc3 d5 8.Nf3 Ne7 9.h5 Nd7 10.cd5 ed5) 7...Qe7 (7...d5 8.h5+= (8.Nf3 Nd7 9.cd5 ed5 10.h5 Ne7) 8...dc4 9.Bc4 Nd7 10.Qc2 Ne7) 8.Nc3 (8.h5 f5 9.Bg7 (9.Nc3 Nh6 10.Nf3 d6) 9...Qg7+= 10.Nc3 Nf6; 8.Nf3 Nh6 9.Qc2 f5 10.Bg7 Qg7) 8...d6 (8...f5 9.h5 a4 10.a3 Nh6) 9.f4 (9.h5 g5+= (9...Nd7 10.Nf3 f5) 10.h6 Bh6; 9.Nf3 Nd7 10.Ne4 Nh6) 9...b6 (9...f5 10.h5+= Nd7) 10.h5 (10.Nf3 f5+/– 1.22 (10...Bb7+=)) 10...f5 11.Qf3 (11.Be2 Bb7 12.Bf3 Nh6+=) 11...Bb7= 12.Qg3 Nd7 (12...g5!?=) 13.hg6+= h6 (13...hg6 14.Qg6 Qf7 15.Qf7 Kf7 16.Rh8 Bh8 17.Nf3+=) 14.Be2+/– Ngf6 15.d3 0–0–0 (15...e5 16.0–0–0+/–) 16.0–0–0+= Kb8 (16...Rhg8 17.Bf3+=) 17.Bf3+/– d5 18.Na4 Ka7 (18...dc4 19.dc4 Ne4 20.Be4 Be4 21.Nf3+=) 19.Nh3 (19.Ne2 h5+/–) 19...Nb8 (19...Rhg8 20.Nf2+=) 20.Qh4 (20.Nc3 Rhg8+/–) 20...Rd7 (20...Nbd7 21.Nf2+/–) 21.Nf2 h5 22.e4 fe4 23.de4 Qf8 (23...dc4!? 24.Rd7 Nbd7+/–) 24.cd5+– ed5 25.e5 (25.f5!? de4 26.Ne4 Ng4 27.Rd7 Nd7 28.Bg7 Qg7+/–) 25...Ng4+/– 26.Nh3 (26.Nd3 c4 27.e6 Rc7=) 26...d4 (26...Ne3 27.Rd2+=) 27.Bg4+/– hg4 28.Qg4 Be4 (28...Qe8 29.Ng5 Rh1 30.Rh1+=) 29.Rhe1+/– Bf5 30.Qg5 Bh6 (30...Re7 31.Ba3+/–) 31.Qf6 Qf6 32.ef6 Bg6 33.Re6 (33.g4 Bf7 34.Re7 Kb7+=) 33...Rb7 34.Rde1 Bf5 35.Re8 (35.Re7 Bf8 36.Rb7 Kb7+=) 35...Re8+= 36.Re8 Bh3 (better is 36...Nd7–/+) 37.gh3+= Bf4 38.Kc2 (38.Kd1 Bg5 39.Re6 Nd7=) 38...Bg5= 39.Re6 Nd7 40.f7 Nf8 41.Rd6 (41.Rc6 Rf7 42.Nb6 Rf2 43.Kb3 Rf3 44.Ka4 Bd8 45.Nc8 Kb8+/–) 41...Bf4 (41...Rf7!? 42.Rb6 Nd7+=) 42.Rc6 (42.Rf6 Be5 43.Rf5 Re7+/–) 42...Be5 (42...Rf7 43.Nb6 Rc7 44.Nd5 Rc6 45.bc6+=) 43.Bc1 (43.Ba3!? Rf7 44.Nb6 d3 45.Kd3 Rf3 46.Ke4 Ra3 47.Ke5 Rh3 48.Nc4+–) 43...Rf7 (43...c4 44.Rc4 Rf7 45.Nb2+=) 44.Rb6 (44.Nb6 Rf2 45.Kd3 Ra2+/–) 44...c4= 45.Ra6 Kb8 46.Rb6 (46.Ra5? d3 47.Kd2 Rf3–+) 46...Rb7 47.Ba3 (47.Rb7 Kb7 48.Nb2 d3 49.Kb1 Bb2 50.Kb2 Nd7+/–) 47...Nd7 (47...d3 48.Kd2 Nh7 49.Rb7 Kb7 50.Bb2 Bf4 51.Kd1=) 48.Bd6 Bd6 (better is 48...Kc8!? 49.Rc6 Kd8=) 49.Rd6+/– ½–½. Egerland,Edit (2230) – Laska,Karol, Bratislava, 1990.

4.e3 e6 5.d4 cd4 6.ed4 (6.Qd4 Ne7 7.Nf3 Nf5 8.Qd3 Bc5 9.Nc3 0–0 10.Be2 d6) 6...d5+= (6...Bb4 7.Bd2 Ne7 8.Nc3 d5 9.Nf3 0–0 10.Qc2 Nf5) 7.c5 b6 8.Bd3 bc5 9.Qh5 Kd7 10.dc5 Bc5.

4.e3 e6 5.Nf3 Be7 (5...d6 6.Bb2 Nd7 7.Nc3 Nh6 8.Bd3 Be7 9.Qc2 Nf7 10.Bh7 Nde5; 5...Nh6 6.Bd3 d6 7.Bb2 Nd7 8.0–0 Ne5 9.Ne5 de5 10.Qc2 Bd6; 5...Ne7 6.Nc3 d5 7.Qb3 Nd7 8.cd5 ed5 9.Nd5 a4 10.Qd3 Ne5) 6.Nc3 Nh6 7.Bd3 0–0 8.Bb2 d6 9.Ne2 f5 10.0–0 e5.

4.e3 Nh6 A) 5.Nc3 d6 (5...Nf7 6.Be2 e6 7.Nf3 Be7 8.Bb2 0–0 9.Qc2 d6 10.0–0 Nd7) 6.Nf3 Nd7 7.Be2 e6 8.0–0 Be7 9.Qc2 0–0 10.Ba3 Qb6; B) 5.Bb2 d6 (5...a4 6.Nf3 d6 7.Bd3 Nd7 8.Qc2 Nf7 9.Bh7 g5 10.Bg6 Rh6) 6.Nf3 Be6 7.Nc3 Nd7 8.Bd3 Ng4 9.Nd5 Nde5 10.Be2 Nf3; C) 5.Nf3 d6 6.Nc3 Nd7 7.Be2 g5 8.h3 Nb6 9.d4 cd4 10.ed4 Bf5.

4.e4 d6+= A) 5.Nf3 Be6 (5...Kf7 6.Nc3 e5 7.Bb2 Ne7 8.Bd3 Be6 9.0–0 Nd7 10.Nh4 Kg8; 5...Bg4 6.Be2 Nd7 7.Nc3 Nh6 8.0–0 Nf7 9.Bb2 Nb6 10.d3 e6; 5...Nh6 6.Nc3 Nd7 7.Be2 Ng4 8.0–0 Nge5 9.Ne5 de5 10.Bb2 e6; 5...g5 6.h3 Bg7 7.Nc3 Nh6 8.Be2 Nd7 9.0–0 0–0 10.d3 Nf7) 6.Nc3 Nd7 7.Be2 Nb6 8.Nd5 Nh6 9.0–0 Bd7 10.Bb2 e6; B) 5.Nc3 Nd7 (5...Nh6 6.Nf3 Nd7 7.Be2 g5 8.h3 Bg7 9.0–0 0–0 10.Bb2 Nf7) 6.Nf3 Ne5 7.Be2 e6 8.0–0 Ne7 9.d4 Nf3 10.Bf3 Ng6.

4.Nf3 A) 4...Nh6 A1) 5.e4 e6 (5...Kf7 6.Nc3 d6 7.Be2 Nd7 8.0–0 e5 9.Nh4 Nb6 10.d3 g5; 5...d6 6.Nc3 Nd7 7.Be2 Ne5 8.0–0 Nf3 9.Bf3 Nf7 10.Be2 e5) 6.Nc3 Be7 7.Be2 0–0 8.0–0 Ng4 9.h3 Ne5 10.d4 cd4; A2) 5.Bb2 d6 (5...a4 6.e3 d6 7.Bd3 Nd7 8.Qc2 g6 9.0–0 Bg7 10.Be4 0–0) 6.Nc3 Nd7 7.e3 e6 8.Qc2 Be7 9.Bd3 Nf7 10.0–0 f5; A3) 5.e3 d6 6.Nc3 Nd7 7.Bb2 e6 8.Bd3 Be7 9.Qc2 Nf7 10.Na4 f5; A4) 5.Nc3 d6 6.e4 Nd7 7.Be2 Ne5 8.0–0 Bd7 9.Ne5 de5 10.d3 e6; B) 4...d6 B1) 5.Nc3 Nh6 (5...Nd7 6.e4 Nh6 7.Be2 g5 8.0–0 Bg7 9.Bb2 0–0 10.Qb3 g4) 6.e4 g5 7.Be2 g4 8.Nh4 Nd7 9.0–0 Ne5 10.f4 gf3; B2) 5.e4 Nh6 (5...Be6 6.Nc3 Nd7 7.Be2 Ne5 8.Nd5 Bd5 9.cd5 Nf3 10.Bf3 Qd7; 5...Nd7 6.Nc3 Ne5 7.Be2 Nh6 8.0–0 Nf3 9.Bf3 Nf7 10.Be2 Bd7; 5...Bg4 6.Be2 Nd7 7.Nc3 Nh6 8.0–0 Ne5 9.Ne5 Be2 10.Qe2 de5; 5...g5 6.Nc3 Nh6 7.Be2 Bg7 8.0–0 0–0 9.Qb3 Nd7 10.h3 Nf7) 6.Nc3 g5 7.Be2 Bg7 8.0–0 0–0 9.Ba3 Nd7 10.h3 Ne5; B3) 5.Bb2 Be6 (5...Nd7 6.Nc3 Nh6 7.e3 e6 8.Qc2 Be7 9.Bd3 Nf7 10.Bh7 Nde5; 5...Nh6 6.Nc3 Be6 7.e3 Nd7 8.Qc2 Ng4 9.Qe4 Nde5 10.Qb7 Rb8) 6.Qc2 Nd7 7.Nc3 Nb6 8.d3 Nh6 9.Ne4 Bd7 10.g3 f5; B4) 5.e3 Bf5 (5...Bg4 6.Nc3 Nd7 7.h3 Be6 8.Qc2 Ne5 9.Ne5 fe5 10.Be2 Nf6; 5...Nd7 6.Nc3 Nh6 7.Bb2 e6 8.Qc2 Be7 9.Bd3 Nf7 10.Bh7 Nde5; 5...Nh6 6.Bb2 Nd7 7.Nc3 e6 8.Qc2 Be7 9.Bd3 Nf7 10.Bh7 Nde5) 6.Nc3 Nd7 7.Be2 Nh6 8.0–0 Nf7 9.Nh4 Be6 10.d4 Nb6.

3.c4 Nf6

4.Bb2 d6 5.e3 g6 6.Nc3 Bg7= 7.Nf3 0–0 8.d4 b6 9.Be2 Nbd7 10.0–0 Bb7 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6 5.d4 Bg7 6.Nf3 0–0 7.c4 c5 8.Nc3 b6 9.Be2 Bb7 10.0–0 Nbd7).

4.Bb2 d6 5.Nf3 Nbd7 6.e3 g6 7.Be2 Bg7 8.0–0 0–0 9.Nc3 b6 (9...Nb6 10.d3=) 10.d4 cd4 11.ed4 Bb7 12.Qd2 (12.Nd2 Rc8=) 12...Re8 (12...d5 13.Ne5 Rc8 14.cd5 Ne5 15.de5 Nd5 16.Nd5 Qd5 17.Qd5 Bd5 18.Bd4+=) 13.Rfe1 e5 14.Ba3 (14.d5 Nc5=) 14...ed4 15.Nd4 Nc5 (15...Rc8 16.Bd6 Ne4 17.Ne4 Re4 18.Nc6 Bc6 19.bc6 Rc6 20.Qd5 Rd6 21.Qe4 Ba1 22.Ra1+=) 16.Rad1 Nfe4 17.Ne4 Ne4 18.Qd3 Qf6 19.f3 (19.Bf3 Nf2 20.Kf2 Qh4 21.Kf1 Re1 22.Re1 Bd4+=) 19...Nc5= 20.Qd2 Na4 21.g3 (21.Kh1 Rac8 22.Qc2 Nc5=) 21...Rac8 (21...Qd4 22.Qd4 Bd4 23.Rd4 Bf3 24.Kf1 Be2 25.Re2=) 22.Kg2 (22.Qc2 Nc5=) 22...d5+= 23.Bf1 Re1 24.Qe1 dc4 25.Bc4 h6 26.Be7 Qe5 27.Qe5 Be5 28.Nc6 Bc6 29.bc6 Nb2 (29...Rc6!? 30.Rd8 Kg7 31.Bf8 Kf6=) 30.Rc1= Nc4 (30...Rc6 31.Bf7 Kf7 32.Rc6 Ke7 33.Rg6+=) 31.Rc4 f5 32.f4 (32.Rc2 Kf7 33.Ba3 Ke6+=) 32...Kf7 33.fe5 (33.Ba3 Bb8+=) 33...Ke7+= 34.c7 Kd7 35.Rd4 Kc7 36.Rd6 Rd8 37.Rg6 Rd2 38.Kf3 Rh2 39.a4 Ra2 40.Kf4 Ra4 41.Kf5 Ra3 (41...h5 42.Rh6 Rg4 43.Rh5 Rg3 44.Rh7 Kc6 45.Ra7 Rf3 46.Ke4–/+) 42.g4 ½–½. Fournier,Frederic (2230) – Ubersoldat1952 (2320), queenalice.com, 2008.

4.d4 e6 5.Nc3 d5 6.Bg5 (6.e3 dc4 7.Bc4 Nbd7=) 6...Nbd7 (6...dc4 7.e3 cd4 8.ed4+=) 7.Nf3 (7.cd5!? cd4 8.Qd4=) 7...cd4+= 8.Nd4 (8.Qd4!? e5 9.Qd3+=) 8...Bb4–/+ 9.Rc1 (9.Bd2!? dc4 10.e3–/+) 9...e5–+ 10.Nf5 d4 (10...dc4?! 11.Ng7 Kf8 12.Bh6=) 11.Ng7 Kf8 12.Nf5 Qb6 (worse is 12...Bc3 13.Rc3 Qb6 14.Ra3+/–) 13.e4? (13.Bd2 Bc3 14.Bc3 dc3 15.Qc2–+) 13...Nc5 14.Bd3? (14.Bh6 Ke8 15.Ng7 Ke7 16.Bd2 dc3 17.Bc3 Nfe4 18.Bb4 ab4 19.Rc2–+) 14...Bc3 (14...dc3?! 15.Qe2–+) 15.Rc3 dc3 16.Qc2 Bf5 17.Bh6 (17.ef5 Rg8 18.Bh6 Ke8–+) 17...Kg8 (17...Ke7 18.ef5 Nd3 19.Qd3–+) 18.ef5 Ng4 19.Be3 Ne3 20.fe3 Rd8 21.Be2 Nd3! 22.Bd3 Qe3 23.Qe2 Qd3 24.Qd3 Rd3 25.Ke2 Rd2 26.Ke1 (26.Kf3–+) 26...Ra2 (26...e4 27.h4 e3 28.Rh3 c2 29.Rg3 Kf8 30.Rg8 Rg8 31.c5 c1Q) 27.Rf1 Ra1 28.Ke2 Rf1 29.Kf1 Kg7 30.Ke2 Rd8 0–1. diggerdogwoofwoof – PeterRs, ChessWorld.net, 2012.

4.e3 b6 5.Be2 Bb7 6.Bf3 d5 7.Nc3 e6 8.Nh3 Qd7 9.cd5 Nd5 10.Nd5 Bd5 11.a4 h6 (11...Bd6 12.Bb2 0–0 13.Bd5 ed5 14.Qf3=) 12.Nf4 Bf3 13.Qf3 Ra7 14.Bb2 Qb7 15.Qg3 Rg8 16.Nh5 g7 draws heavy fire 16...Qc7?? (better is 16...Nd7+=) 17.Nf6! gf6 18.Qg8 Nd7 19.0–0 Ne5 20.d4 Ng6? (20...Nc4 21.Bc3 cd4 22.ed4+–) 21.Rfc1 (21.dc5 bc5 22.Bf6 Ne7+–) 21...Ke7 (21...c4+–) 22.Ba3 (22.Ba3 Ke8 23.dc5+–) 1–0. mikebaldini (1645) – sonata296 (1665), gameknot.com, 2014.

4.e3 e5 5.Bb2 d6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 c5).

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

4.g3 e6 5.Nf3 (5.Bg2 d5 6.Nf3 Bd6 7.d3 0–0 8.Nbd2 a4 9.0–0 Nbd7 10.a3 Qb6 11.Rb1 Rd8 12.Qc2=) 5...b6 (5...d5 6.Bg2 Bd6 7.Qc2 0–0 8.0–0 Qb6 9.d3 Nbd7 10.Nc3 d4 11.Na4 Qd8 12.Nb2=) 6.Qc2 (6.Bg2 d5 7.0–0 Bd6 8.d4 0–0 9.Bg5 Bb7 10.dc5 bc5 11.Nc3 Nbd7 12.Rb1=; 6.Na3 d5 7.Bg2 Bd6 8.0–0 0–0 9.Bb2 Bb7 10.d4 Nbd7 11.Rc1 Qe7 12.cd5=; 6.Bb2 d5 7.Bg2 Bb7 8.Na3 Bd6 9.0–0 0–0 10.d4 Nbd7 11.Rc1 Qe7 12.cd5=) 6...Bb7 (6...d5 7.Bg2 Bd6 8.0–0 0–0 9.d4 Bb7 10.dc5 Bc5 11.cd5 Qd5 12.Bb2=) 7.Bg2 d5 (7...Be7 8.0–0 0–0 9.d3 d5 10.Na3 a4 11.Rd1 Bd6 12.Bg5=) 8.cd5 (8.0–0 Bd6 9.cd5 ed5 10.d4 0–0 11.Nc3 Nbd7 12.Ng5=) 8...ed5 9.0–0 Nbd7 (9...Bd6 10.d4 0–0 11.Nc3 Re8 12.Rd1=) 10.d4 (10.Nh4 Be7 11.Nf5 0–0 12.Nc3=) 10...Rc8 11.Nc3 (11.dc5 bc5 12.Bf4=) 11...Bd6 (11...Ne4 12.Qb3= (12.Qb2=); 11...cd4 12.Nd4=) 12.Bb2 (12.Rd1=) 12...0–0 13.Rad1 Re8 14.dc5 Bc5 15.e3 Bb4 16.Qd3 Rc7 (16...Qe7 17.Ne2=) 17.Na4 Ne4 (17...Nc5 18.Nc5 bc5 19.a3=) 18.Nh4 (18.Rc1 Ndc5 19.Nc5 bc5=) 18...Be7 19.Nf5 Bf6 20.Be4 (20.Bd4 Bd4 21.Qd4 Qg5+=) 20...Re4 (worse is 20...de4 21.Bf6 ed3 22.Bd8 Rd8 23.Rd3+/–) 21.Bd4 Bd4 22.ed4 (22.Nd4 Ne5 23.Qe2 Nc4=) 22...g6 (22...Qf6 23.Ne3 Qd6 24.Rc1=) 23.f3 (23.Nd6 Re6 24.Nb7 Rb7=) 23...Re6 24.Ne3 Nf6 25.Rfe1 Qd6 26.Rc1 Qb4 27.Nc3 (27.Rc7? Qe1 28.Qf1 A) 28...Re3?! 29.Qe1 (29.Rb7?? Qd2–+) 29...Re1 30.Kf2–/+; B) 28...Qe3 29.Qf2 Qa3–+) 27...Re8 28.Ne2 Bc8 29.Rb1 (29.Rc7?? Qe1 30.Kg2 Bf5–+) 29...Qd6 30.Qd2 Nh5 (30...Bd7 31.a4=) 31.Rbc1 Rc1 32.Rc1 Bd7 33.a4 f5 34.Nc2 Qe7 (34...Rc8 35.Re1=) 35.Nc3 Qd6 36.Ne1 Qb4 37.Qf2 Qc4 38.Ng2 Be6 39.Qd2 Qb4 40.Re1 Kg7 (40...Kf7 41.Qd3+=) 41.Re3 (41.g4 Nf6+=) 41...Bf7 (41...f4 42.gf4 Nf6 43.Re5=) 42.Re8+= Be8 43.Kf2 Bf7 44.Ne3 (44.Ne1 Nf6=) 44...Nf6 ½–½. Buczinski,Henryk – Kuhne,Detlev, IECG, 2010.

4.Bb2 e6

5.e3 b6 6.d4 cd4 7.Bd4 Bb7 =.

5.e3 b6 6.Nf3 Bb7 7.Be2 d5 8.0–0 Nbd7 9.d4 Qc7 (9...cd4 10.Bd4 Rc8 11.Nbd2=) 10.Nbd2 (10.cd5 Bd5 11.dc5 Bc5=) 10...Bd6 (10...cd4 11.Bd4 Bc5 12.Rc1=) 11.h3 (11.cd5 Bd5 12.Qb1 cd4=) 11...0–0 12.a4 (12.dc5 Bc5 13.cd5 Bd5=) 12...Rac8 (12...cd4 13.Nd4 Rad8 14.Rc1=) 13.Rc1= Rfd8 14.Bd3 Be7 15.Qe2 Qb8 16.Rfd1 cd4 17.ed4 (17.Nd4 Nc5 18.Bc2 Qd6=) 17...Qf4 (17...Nh5 18.Ne5 Nf4 19.Qe3 Nd3 20.Qd3 dc4 21.Ndc4 Ne5 22.Ne5 Rc1 23.Rc1 Qe5 24.de5 Rd3 25.Rc7–+) 18.Qe3 Qe3 19.fe3 Bb4 20.Rc2 Ne8 (20...dc4 21.Nc4 Nd5 22.Rdc1=) 21.Rdc1 Nd6 22.cd5 ed5 23.Rc8 Rc8 24.Rc8 Bc8 25.e4 de4 (25...Bb7 26.e5 Ne4 27.Nb3=) 26.Ne4 Ne4 27.Be4 Nf6 28.Bc2 Be6 29.Ne5 Bd5 30.Nc6 (30.Kf2 Kf8=) 30...Bd6 (30...Kf8 31.g4=) 31.Bc1 Kf8 (31...h6 32.g4=) 32.Bg5+= h6 (32...Nd7 33.Kf2+= (worse is 33.Bh7 g6–/+)) 33.Bc1 (33.Bf6!? gf6 34.g4+=) 33...Ke8= 34.Ne5 Nd7 (34...Bb4 35.Kf2=) 35.Nd7 (35.Ng4 Be6=) 35...Kd7 36.Kf2 Ke6 37.g4 g5 38.Bf5 Ke7 39.Bc2 Bb4 40.Bb2 Ke6 41.Bf5 Kd6 42.Bc2 Ba2 43.Ke3 Kd5 44.Kd3 Bd6 45.Kc3 Bg3 46.Bb3 (46.Bd1!?=) 46...Bb3–/+ 47.Kb3 Bf2 The isolani on d4 becomes a target 48.Ba3 Bd4 (48...Kd4 49.Bf8+=) 49.Bf8= Bc5 50.Bh6 f6 51.Bg7 Ke6 52.Kc4 Be7 53.Bh8 Bd8 54.Bg7 Kf7 55.Bh6 Be7 56.Kd5 Bc5 (56...Bb4 57.Kc6 Bc5 58.Kc7=) 57.Kc6= Kg6 (57...Kg8!?=) 58.Bf8+= Bf8 59.Kb6 Bb4 ½–½. Lueders,Horst – Lehmann,Heinz, Kiel, 1959.

5.e3 b6 6.Nf3 Bb7 7.Be2 d6 8.0–0 Nbd7 9.Nc3 Be7 10.d4 Qc7 11.d5 e5 12.Bd3 0–0–0 (better is 12...Bc8!?+=) 13.Ng5 Rdf8 14.f4 h6 15.Nf3 Ng4 16.Qe2 f5 17.Nd2 e4 18.Be4! Ne3 (18...fe4 19.Qg4) 19.Qe3 fe4 20.Nce4 Nf6 21.Rae1 (21.Rae1 Re8 22.Qg3+–) 1–0. MT – guest860, ICC, 2004.

5.e3 d5 6.Nf3 b6 7.a4 Bb7 8.d4 Nbd7 9.Bd3 (9.cd5 Nd5 10.Bc4 cd4 11.Bd4 Bb4 12.Nbd2 N5f6=) 9...cd4+= 10.Nd4 (10.Bd4!? Bd6 11.Be2+=) 10...Bb4 11.Nc3 Ne5 12.0–0 Rc8 13.Nde2 (13.Rc1 Nd3 14.Qd3 dc4–/+) 13...Nc4 14.Bc4 Rc4 15.Qd3 0–0 16.Ng3 Qe7 17.e4 (17.Nce2 Rfc8–+) 17...Rfc8 18.ed5? (18.Rfc1–+) 18...Bc3 (18...Rc3?! 19.Bc3 Rc3 20.d6 Qd6 21.Qd6 Bd6 22.Rac1–+) 19.Rac1 (19.d6 Qd8 20.Rac1 Rd4–+ (worse is 20...Bb2 21.Rc4 Rc4 22.Qc4–+)) 19...Nd5 20.Bc3 Rc3 (20...Rc3 21.Rc3 Nc3–+) 0–1. Trkn – Osiris, itsyourturn.com, 2000.

5.e3 d5 6.Nf3 b6 7.Be2 Bd6 8.0–0 Nbd7 9.d4 Bb7 10.dc5 Nc5 11.cd5 Qc7 (better is 11...Bd5!? 12.Nc3 Bb7=) 12.Bf6+/– gf6 13.Nc3 Rd8 14.Qd4 (better is 14.Rc1!?+/–) 14...Be5+= 15.Ne5 Qe5? (better is 15...fe5 16.Qg4 ed5+=) 16.f4+– Qd4 17.ed4 Nd7 18.Bf3 e5? (18...Rb8 19.Rae1 Ke7 20.de6 fe6 21.Bg4+–) 19.de5 fe5 20.fe5 Ne5 21.Rae1 f6 22.Bh5 Ke7 23.Re5! fe5 24.Rf7 Kd6 25.Rb7 Kc5 26.Rc7 Kd4 27.Bf3 Rc8 28.Rc6 1–0. Pcmvr – MMT, playchess.de, 2005.

5.e3 d5 6.Nf3 Bd6 7.Be2 b6 8.0–0 Bb7 9.Nc3 0–0 10.cd5 ed5 11.d4 Nbd7 12.dc5 bc5 13.Qc2 Nb6 14.a4 Qc7 15.Nb1 Nbd7 16.Nbd2 Rae8 17.h3 Bc8 (17...Rc8 18.Rab1=) 18.Bc3 Ne4? (better is 18...d4!? 19.Bb2 de3 20.fe3 Re3=) 19.Ne4+/– de4 20.Nd2 f5 21.Nc4 Be5 22.Ba5 (22.Ba5 Bh2 23.Kh1+–) 1–0. marekt – arpad, internet, 2014.

5.e3 d6 6.Nf3 Nbd7 7.a4 b6 (7...d5 8.cd5 ed5 9.Nc3=) 8.Be2 (8.Bd3 Bb7+=) 8...Bb7 9.0–0 Be7 10.d4 Rc8 11.Nbd2 0–0 12.Bd3 Qc7 (12...cd4 13.Bd4 Nc5 14.Bc5 Rc5 15.Rc1=) 13.Rc1 Qb8 (13...cd4 14.ed4 (14.Bd4? e5–+) 14...Rfe8 15.Re1=) 14.e4 (14.Nb3 cd4 15.Bd4 Qc7=) 14...cd4 15.Bd4 Nc5 16.Bc5 (16.Qc2 Qc7=) 16...Rc5 (worse is 16...bc5 17.Rb1+=) 17.Qe2 (17.Nb3 Rc7 18.Re1 Rfc8=) 17...Nd7 (17...Qc7 18.Nb3 Rh5 19.Rfd1=) 18.Nb3= Rcc8 19.Rfd1 Rfe8 20.g3 (20.Qe3 Nc5 21.Nc5 Rc5=) 20...Bf8 (20...Nc5 21.Nc5 Rc5 22.Qe3+=) 21.Nh4 (21.Qe3 Nc5 22.Nc5 Rc5=) 21...Qc7 22.Ng2 (22.Nf3 Nc5 23.Nc5 Qc5+=) 22...g6 (22...Be7 23.Qf3+=) 23.h4 (23.Ne3 Bg7=) 23...Ne5 (23...Bg7 24.Qf3–/+) 24.Bb1 (24.f4!? Nd3 25.Qd3+=) 24...f5 (24...Nc4 25.Rd4 d5 26.Ne3–+) 25.f4 (25.ef5 Bf3 (25...gf5?! 26.Nd4–/+) 26.Qc2 ef5–+) 25...Nc4 26.Ne3 d5 27.Nd2 (27.Nd4 Ba3 28.Rc3 Bb4–/+) 27...Bc5 28.Ndc4 dc4 29.Kh2 e5 (29...Be3!? 30.Qe3 fe4–/+) 30.Qc4+= Kh8 31.Qc3 fe4 32.Nd5? (better is 32.Ba2–/+) 32...Bd5–+ 33.Rd5 Bg1!! 34.Kg1 (34.Rg1 A deflection 34...Qc3) 34...Qc3 35.Rc3 Rc3 36.Be4 0–1. Klement,Ottomar – Mazi,Leon (2360), St Veit op, 1995.

5.e3 d6 6.Nf3 Nbd7 7.Be2 Be7 8.0–0 0–0 9.Qc2 b6 10.Nc3 Bb7 11.d4 cd4 12.ed4 Rc8 13.Nd1 d5 14.Ne3 dc4 15.Nc4 Nd5 16.Qd2 Bb4 17.Qg5?? (better is 17.Qc2–/+) 17...Qg5–+ 18.Ng5 Nf4 19.Bf3 Bf3 (19...Rc4?! 20.Bb7 Nd3 21.Bc1–/+) 20.Nb6 Ne2 21.Kh1 Bg2! 22.Kg2 Nb6 23.Nf3 Rc2 24.Bc1 Bc3 (24...Bc3 25.Rb1 Ra2–+) 0–1. Saemann,Thomas – Wichmann,Ralph (1775), OL–079, 2001.

5.e3 d6 6.Nf3 Be7 7.Be2 =.

5.e3 Be7 6.Bd3 d5 7.Nf3 Nbd7 8.0–0 0–0 9.Qc2 Qc7 10.a4 Bd6 0–1. nxito – PeterRs, ChessWorld.net, 2012.

5.Nf3 d5 6.e3 b6 7.a4 Nbd7 8.Na3 Bd6 9.Be2 Bb7 10.0–0 0–0 11.d4 Ne4 12.Qb3 Rc8 13.Rac1 Bb8 (13...cd4!? 14.ed4 Qf6+=) 14.Rfd1 Qc7 15.g3 Ba8 16.cd5 ed5 17.Nb1 (17.dc5 Ndc5 18.Qa2 Qe7=) 17...Qd6 (17...c4 18.Qc2=) 18.Kg2 (18.dc5 Ndc5 19.Qc2 Qg6=) 18...c4+= 19.Qc2 Qe6 20.Nc3 f5 21.Ba3 Rf6 22.Qa2 Re8 23.Ne4 (23.Kg1!?+=) 23...fe4–/+ (23...de4?? 24.Ng5 Bd5 25.Ne6 Be6 26.Bc4 Bc4 27.Qc4 Rf7 28.Qc8+–; 23...Qe4 24.Kg1 f4 25.Ng5+=) 24.Nd2 Qf5 25.Rf1 Rh6 26.Rh1 g5 (26...Qh3!? 27.Kg1 Rf6–/+) 27.g4 Qf6 28.Nf1 Nf8 29.Ng3 Ng6 30.Nf5 Nh4 31.Nh4 Rh4 32.h3 Kg7 33.Bd1 Qf7 34.Bb2 Qc7 (34...Rh6 35.Ba3–/+) 35.Bc3 (35.Ba3!?+=) 35...Bb7 36.Be1 Rh6 37.Qc2 Rf6 38.h4 gh4 39.f4? (better is 39.Rh4 Qf7 40.Kf1–/+) 39...ef3!–+ 40.Bf3 (40.Kg1 Re3 41.Bh4–+) 40...Re3 41.Rh4 Kg8 (41...Rff3? 42.Rh7 Kf8 43.Rc7 Bc7 44.Qh7+–; 41...Ref3 42.Rh7 Kf8 43.Rc7 Bc7 44.Qh7+–) 42.Be2 Rfe6 43.Kf1 (43.Bf3 Re1 44.Rh3 Rc1 45.Qc1 Qg7–+) 43...Re2 44.Qe2 Qf4 45.Qf2 Qc1 46.Rh1 (46.Rh5 Bd6–+) 46...Re4 47.Qh4 Rf4 (47...h5 48.Qd8 Kf7 49.Qd7 Re7 50.Qf5 Kg8 51.Kg2 Re1 52.Qg6 Kf8 53.Qf6 Ke8 54.Qg6 Ke7 55.Qg7 Kd6 56.Qf6 Kd7 57.Qf7 Kc8 58.Qf8 Kc7 59.Qf7 Kd8 60.Qf6 Kc8 61.Qf5 Kd8 62.Qf6 Kc8 63.Qf5 Kd8 64.Qf6=) 48.Kg1 Qe3 (48...h6!? 49.Qd8 Rf8 50.Qe7–+) 49.Bf2 Qe4 50.Qg5 (50.Qd8 Rf8 51.Qg5 Kh8–+) 50...Qg6 51.Qd8 Rf8 52.Qd7 (52.Qh4 Bc8 53.Bg3 Qb1 54.Be1 Qd3–+) 52...Qf7 (better is 52...Qb1 53.Kg2 Qe4 54.Kg1 Bc8 55.Qh7 Qh7 56.Rh7 Kh7–+) 53.Qf7 Rf7 54.Rh6 (54.Kg2 Rg7–+) 54...Bc7 55.Be3 Kg7 (better is 55...Rf3 56.Bf2–+) 56.Re6 Rd7 57.g5 Rf7 58.Kg2 Bc8 59.Rc6 Bf5 60.Bc1 (60.Bf2 Be4 61.Kh3 Rf2 62.Rc7 Kg6–+) 60...Be4 61.Kg1 Bd8 (61...Bg3 62.Rb6 Bf2 63.Kh2 Bd4 64.Re6–+) 62.Kh2 (62.Rd6 Rf8–+) 62...Bc2 63.Kh3 Ba4 64.Rd6 Bc7 65.Rd5 Kg6 66.Bd2 (66.Kg2 c3 67.Kg1 Bb3–+) 66...c3! (66...c3 67.Bc1 Rf2–+) 0–1. Navratil,Josef (2035) – Zavadil,Michal (2050), Bohemia South–chT, 2005.

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

3.d4 e6

4.d5 Nf6 5.Nc3 b6 6.e4 d6 7.Bd3 e5 8.Nge2 Bg4 9.f3 Bh5 10.0–0 Be7 11.Be3 Nbd7 12.Qe1 Qc7 13.Bc4 0–0–0 14.Ng3 Bg6 15.Qe2 Nh5 16.Nh5 Bh5 17.a3 Rdf8 18.Qd2 f5 19.ef5 Be8 20.Qd3 Nf6 21.Ne4 Qd7 22.Ng5 g6 23.Ne6 Rfg8 24.Bh6 gf5 25.Bg7 Rg7 26.Ng7 Bg6 27.f4 e4 28.Qb3 Ng4 29.Ne6 Bf6 30.Rae1 Bd4 31.Nd4 cd4 32.Qb2 Qg7 33.h3 Nh6 34.Rd1 (34...Bh5 35.Qd4+– (35.Rd4 Rg8 36.c3 e3=+)) 1–0. marre (2045) – torcida (1885), GameColony.com, 2003.

4.d5 Nf6 5.Nc3 d6 6.e4 Be7 7.Bc4 Nbd7 8.de6 fe6 9.Be6 Ne5 10.Bd5 Nd5 11.Qd5 (11.ed5?! 0–0 12.Nge2 Bf6=) 11...Qd7 12.Nge2 Qe6 13.Nf4 Qd5 14.Ncd5 Bd8 15.Bb2 0–0 16.Be5 de5 17.Nd3 c4 18.Ne5 Re8 19.f4 Bf6 20.Nb6 Be5 21.fe5 Re5? 22.Na8 1–0. kamret (2180) – lisarik (1955), GameColony.com, 2003.

4.Nf3 d5 5.Nc3 Nf6 6.Bg5 h6 (6...cd4 7.Nd4 h6 8.Bf6 Qf6 9.Qd2 Bb4 10.a3) 7.Bf6 (7.Bf4 cd4 8.Qd4 Nbd7 9.Na4 Ne4 10.Rb1) 7...Qf6 8.e4 (8.e3 cd4 (8...Nd7 9.Rb1 Bd6 10.b6) 9.ed4 (9.Qd4 Nd7 10.0–0–0) 9...Bb4+= (9...Nd7 10.Bd3) 10.Qd2) 8...cd4 9.Qd4?? (better is 9.e5 Qf4 (9...Qd8 10.Qd4) 10.Qd4 Qd4 11.Nd4–/+) 9...Qd4–+ 10.Nd4 Bb4 11.Kd2 e5 12.Nde2 d4 13.a3 Bc3 (13...dc3 14.Nc3 Bc3 15.Kc3–+) 14.Nc3 dc3 15.Kc3 b6 16.Bc4 Ra7 17.Kb2 Rc7 18.Bd5 Bb7 19.Bb7 Rb7 20.Rhd1 Rd7 21.f3 Ke7 22.Rd5 Rd5 23.ed5 Rc8 24.Rc1 Nd7 25.c4 Nf6 26.Rc3 Nh5 27.g3 g5 28.Kb3 Ng7 29.g4 h5 30.h3 hg4 31.hg4 Ne8 32.Ka4 Kd6 33.Kb3 Kc5 34.Rd3 Nd6 35.Kc3 Nc4 0–1. Trkn – Al Bundy, itsyourturn.com, 2001.

3.e3 b6

4.Bb2 Bb7 (--> 2.b5 b6 3.e3 Bb7 4.Bb2 c5).

4.Bb2 d5 5.c4 e6 6.f4 Nf6 7.Nf3 Nbd7 8.Bd3 Bb7 9.0–0 Bd6 10.Nc3 0–0 11.Qc2 Qc7 12.Rae1 Rad8 13.g3 dc4 14.Bc4 Qb8 15.a4 Qa8 16.e4 Bb8 17.Ng5 h6 18.e5 Bh1 19.Nge4 Be4 20.Ne4 Nd5 21.Rf2 Ne7 22.Nf6 gf6 23.ef6 (23.ef6 Nd5 24.Re6+/–) 1–0. Vaassen,Jack (2125) – Zhdanenia,Konstantin, RH–2007–0–00081, 2007.

4.Bb2 d5 5.f4 Nf6 6.Nf3 Bb7 7.Be2 Nbd7 8.0–0 Rc8 9.Ne5 Ne4 10.d3 Nd6 11.Nd2 Nb5 12.c4 dc4 13.Ndc4 Nd6 14.Nd7 Nc4 15.dc4 Qd7 16.Qb3 Qc6 17.Bf3 Qc7 18.Be5 Qd7 19.Qb6 Bf3 20.Rf3 f6 21.Bc3 Kf7 22.Qa5 e6 23.Qa3 Be7 24.Qb2 Qd3 25.Rc1 Qc4 26.Bf6 Qb4 27.Bg7 Rhd8 28.Qb4 cb4 29.Rff1 Kg7 30.Rb1 Rd2 31.Rf2 Rcc2 32.Rd2 Rd2 0–1. carocan (1780) – fontolos (1680), kurnik, 2012.

4.c4 Bb7 5.Nf3 e6 6.d4 d6 7.Bb2 Nf6 8.dc5 dc5 9.Qd8 Kd8 10.Bf6 gf6 11.Be2 Nd7 12.0–0 Kc7 13.Nc3 Be7 14.Rad1 Rad8 15.a4 f5 16.Rd3 e5 17.Rdd1 e4 18.Nd2 Ne5 19.Nb3 Rd1 20.Rd1 Rd8 21.Rd8 Kd8 22.Kf1 Bf6 23.Nd5 Bd5 24.cd5 Kd7 25.f4 ef3 26.gf3 Kd6 27.e4 fe4 28.fe4 c4 29.Nd2 Kc5 30.Nf3 Ng4 31.h3 Ne3 32.Kf2 Nd5 33.ed5 Kd5 34.h4 Kc5 35.Ng5 Bg5 36.hg5 c3 37.Bd3 Kb4 38.Bh7 Kb3 39.Ke3 c2 40.Bc2 Kc2 41.Kd4 Kb3 42.Kd5 Ka4 43.Kc6 Kb4 44.Kb6 a4 45.Kc6 a3 46.b6 a2 47.b7 a1Q 48.b8Q Kc4 49.Qf4 Kd3 50.Qf5 Ke3 51.Qf7 Qc3 52.Kd7 Qd4 53.Ke6 Qc4 54.Kf6 Qf4 55.Kg6 Qe4 56.Qf5 Qe8 57.Qf7 Qe4 58.Qf5 Qe8 59.Qf7 Qe4 ½–½. wgwl (1695) – carocan (1730), kurnik, 2012.

4.Qf3 d5 5.Bb2 Bb7 6.Qd1 (6.Be2 Nd7=) 6...e5 (6...Nf6 7.Nf3=) 7.d4 (7.Be5!? Nd7 8.Bb2+=) 7...e4 8.a4 (8.dc5 bc5 9.c4 Nf6=) 8...f5 9.c4 cd4 10.Bd4 Be7?? 11.Bg7+– Nf6 12.Bh8 Nbd7 13.Bf6 Nf6 14.Nd2 Bb4 15.Rb1 Bc3 16.Qc2 Bb4 17.Ne2 Qd6 18.Nd4 Qe5 19.Be2 0–0–0 20.g3 Kb8 21.h4 dc4 22.Bc4 Rd4 23.ed4 Qd4 24.Be6 Ng4 25.Rc1 Qf2 26.Kd1 Ne3 0–1. slavisa3 – AlejandroSosa, Live Game Caissa's Web, 2004.

4.f4 Bb7 5.Nf3 Nf6 6.Be2 g6 7.0–0 Bg7 8.Bb2 0–0 9.c4 d5 10.a4 Nbd7 11.cd5 Bd5 12.Nc3 e6 13.Nd5 ed5 14.Ne5 Ne5 15.fe5 Nd7 16.d4 c4 17.Bf3 Nb8 18.Ba3 Re8 19.Bd6 Bf8 20.Bd5 Ra7 21.Qf3 Qd7 22.Bf8 Rf8 23.Bc4 Qe7 24.e6 fe6 25.Qe4 Kg7 26.Qe5 Kh6 27.Rf8 Qf8 28.Be6 Re7 29.d5 Nd7 30.Qd6 Nc5 31.Qb6 Ne6 32.de6 Qe8 33.Qa5 Re6 34.Re1 Re7 35.Qc3 Re4 36.Qd3 Ra4 37.b6 Rb4 38.Qd6 Qe4 39.Qf4 Qf4 40.ef4 Rb6 41.Re5 Kg7 42.Kf2 h5 43.Kg3 Kf6 44.Kh4 Rb2 45.Kh3 Rb3 46.g3 Rb2 47.Rd5 Re2 48.Rg5 Rf2 49.Rc5 h4 50.Kh4 Rh2 51.Kg4 Ra2 52.Rc6 Kg7 53.Kg5 Ra5 54.Kg4 Kh6 55.Re6 Kh7 56.Re5 Ra3 57.Rd5 Rb3 58.Kh4 Ra3 59.g4 Ra7 60.Rd6 Ra5 61.g5 Ra1 0–1. lllllll21 – galileo10 (1790), kurnik, 2012.

4.f4 d5 5.Bb2 Bb7 6.Nf3 Nd7 7.Be2 Ngf6 8.c4 e6 9.Nc3 Qc7 10.Qc2 Be7 11.a4 0–0–0 12.Rg1–+ (12.cd5!? ed5 13.Rc1=) 12...h6= (12...d4!? 13.Nd1 de3 14.de3 h5–+) 13.0–0–0 Rhg8 14.Ne5 d4 15.Nc6 Bc6 16.bc6 dc3 17.cd7 Rd7 18.Bc3 (18.dc3 Bd6=+) 18...Bd6 19.Bf6 gf6 20.Qe4 Kb8 21.Bf3 Ka7 22.Qc6 Qc6 23.Bc6 Rc7 24.Bf3 (24...f5 (24...Ka6; 24...Re7) A) 25.Kc2 f6 (25...Rd7 26.Rb1 Rgd8 27.Bc6 Rc7–+; 25...Re7 26.Rb1 h5 27.Rb5 h4–+) 26.Rb1 e5 27.g3 Re7+=; B) 25.g3 Rd7 (25...Be7 26.Kc2 Rd7 27.Rb1 Rgd8–+; 25...f6 26.Rde1 Rd7 27.Kc2 Bc7+=) 26.Kc2 Bc7 27.Rb1 Rgd8+=; C) 25.d3 f6 (25...h5 26.Bh5 e5 27.Bf3 ef4–+; 25...Rd7 26.Kd2 Rgd8 27.Bc6 Rc7–+) 26.Kd2 Re7 27.g3 e5+=) ½–½. Plock – Mann, 1998 (Plock).

3.e3 d5

4.a4 b6 5.Nf3 Nf6 6.Bb2 e6 7.c4 Bb7 8.Be2 Nbd7 9.0–0 Be7 10.Nc3 dc4 11.Bc4 0–0 12.Qc2 Nd5 13.Nd5 ed5 14.Bd3 g6 15.Rac1 Bf6 16.Bf6 Qf6 17.Be2 Rae8 18.d3 Qf5 19.d4 Qc2= 20.Rc2 c4 21.Nd2 f5 22.Bf3 Nf6?? 23.Rfc1?? Ne4= 24.Ne4 fe4 25.Bg4 Rf6 26.f4? Ref8 27.h4=+ Kg7 28.g3 h6 29.Rf1 g5 30.Rc3? gh4–+ 31.gh4?? Rg6 32.Kh2 Rg4 33.Kh3 h5 34.Rf2 Bc8 35.Kh2 Kf6 36.Rg2 Rfg8 37.Rcc2 Rg2 38.Rg2 Rg2 39.Kg2 Bg4 40.Kf2 Bd1 41.Ke1 Ba4 42.Kd2 Bb5 43.Kc3 Kf5 44.Kb2 Bc6 45.Kc3 b5 46.Kb2 b4 47.Kc2 a4 48.Kb2 Kg4 49.Kc2 Kh4 50.Kb2 Kg3 51.Kc2 Kf3 52.f5–+ Ke3 53.f6 Be8 54.f7 Bf7 55.Kb2 Kd4 56.Kc2 Bg6 57.Kd2 e3 58.Ke2 Bd3 59.Kf3 e2 60.Kf2 c3 61.Ke1 b3 (61...b3 62.Kf2 h4 63.Kg2 e1Q 64.Kh2 Qf2 65.Kh3 Qg3; 61...c2 62.Kf2 c1Q 63.Kg3 e1Q 64.Kh3 Qce3 65.Kg2 Q1g1) 0–1. erisonpassos – mufoun, kurnik, 2011.

4.Bb2 (--> 1.b4 a5 2.b5 d5 3.Bb2 c5 4.e3).

4.Bb2 Nd7 5.f4 Ngf6 6.Nf3 e6 (--> 1.b4 a5 2.b5 d5 3.Bb2 c5 4.e3 e6 5.f4 Nf6 6.Nf3 Nbd7).

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

4.c4 (--> 3.c4 d5 4.e3).

4.Nf3 b6 5.Bb2 a4 6.a3 f6 7.c4 dc4 8.Bc4 e5 9.Nc3 Bd6 10.Na4 Ne7 11.Nc3 Ng6 12.0–0 Bg4 13.h3 Bd7 14.Qb3 Qe7 15.a4 Nf8 16.Nd5 Qd8 17.d4 cd4 18.ed4 e4 19.Nd2 f5 20.Rfe1 Ne6 21.f3 Qg5 22.Nf1 ef3 23.Qf3 0–0 24.Nb6 Ra5 25.Nd7 Nd7 26.Be6 Kh8 27.Bd7 Bb4 28.Re5 Qd8 29.Bc6 Ra7 30.Rf5 Rf5 31.Qf5 h6 32.d5 Bc5 33.Kh1 Qh4 34.d6 Bd6 35.Rd1 Be7 36.Bd4 1–0. barborski – valdutpopa (1730), kurnik, 2012.

4.Nf3 b6 5.c4 Bb7 6.cd5 Bd5 7.Nc3 Bb7 8.Bc4 e6 9.0–0 Nf6 10.Bb2 Be7 11.d4 0–0 12.dc5 Bc5 13.Ne5 Qc7 14.Ne2 Nbd7 15.Nd7 Nd7 16.Ng3 Rad8 17.Qc2=+ Ba8 18.Qc3 Nf6= 19.Be2 Rfe8 20.Rac1= Rc8 21.Nh5 Nh5 22.Bh5 e5 23.Rfd1 g6 24.Bg4 Rcd8 25.Rd8 Qd8= 26.Rd1 Qg5 27.Bh3 Be4 28.g3?? h5 29.f4 Qf6= 30.Bg2 Bg2 31.Kg2= h4 32.fe5 Qf5= 33.Qd3?? h3 34.Kg1 Qf3 (34...Qf3 35.Rd2 Be3 36.Qe3 Qe3 37.Kf1 Qd2 38.Bc1 Qc1 39.Kf2 Re5 40.Kf3 Qh1 41.Kg4 Qe4 42.Kh3 Rh5#) 0–1. efektar (1965) – antique (1930), kurnik, 2011.

3.e3 e5

4.Bb2 d6 5.c4 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 c5).

4.Bb2 d6 5.Nf3 b6 6.Be2 Bb7 7.0–0 Ne7 8.d3 g6 9.Nbd2 Bg7 10.c4 0–0 11.Qc2 f5 12.a3 Nd7 13.Rac1 Nf6 14.Ng5 Qd7 15.Bf3 Rab8 16.Bb7 Rb7 17.Ngf3 h6 18.Rcd1 Rd8 19.d4 e4 20.Ne1 Qc7 21.d5 Qd7 22.g3 Qe8 23.Ng2 Qf7 24.Nf4 Nh7?? 25.Ne6 Bb2 26.Nd8 Qf6 27.Nb7 Be5 28.Nd8 h5 29.Ne6 h4 30.f4 Bc3 31.Rc1 Bd2 32.Qd2 hg3 33.hg3 1–0. ejdrzej (1625) – wierszawers, kurnik, 2012.

3.e3 Nf6

4.Bb2 e6 5.Nf3 b6 6.Be2 Bb7 7.0–0 Be7 8.d4 0–0 9.c4 d5 10.Ne5 Qc7 11.Nd2 Nbd7 12.Nd7 Nd7 13.a4 Bf6 14.Rc1 Rac8 15.Ba3 Be7 16.Nb3 dc4 17.Rc4 Bd5 18.Rc1 Bb3 19.Qb3 Bd6 20.h3 Qb8 21.Rfd1 cd4 22.Rc6 Ba3 23.Qa3 Ne5 24.Rc8 Rc8 25.Rd4 Rd8 26.Qc3 Rd4 27.Qd4 Qc7 28.Qe4 g6 29.f4 Nd7 30.Qc6 Qd8 31.Qd6 Qc8 32.Kh2 h5 33.Bf3 h4 34.e4 Kg7 35.Bg4 Qb7 36.Bf3 Nc5 (36...Qc8 37.e5+/–) 37.Qd4 (37.Qd8 Qa7+/–) 37...Kh7 (37...f6 38.e5 Qf7 39.g3=) 38.f5 (38.Qd8!?+/–) 38...Qd7 39.Qf6 ef5 (< 39...gf5 40.Qh4 Kg6 41.Qg3 Kh6 42.Qf4 Kg6 43.ef5 ef5 44.Qb8+=) 40.e5 (40.ef5 Qf5 41.Qb6 Qe5 42.Kg1 Na4 43.Qa5 Qc5 44.Kh1 Nb6=) 40...Qc7 (better is 40...Qe6!? 41.Qh4 Kg7–/+) 41.Qh4 Kg8 42.Kh1 (42.Qf6!? Na4 43.Bd5=) 42...Ne6 43.Qe1 Qc4 44.Qa1 Qd4 (44...Qf4 45.Bc6–/+) 45.Qg1 Qg1 46.Kg1 Nc5 47.Bd1 Nd3 48.Kf1 Ne5 49.Ke2 Kf8 50.Ke3 Ke7 51.Kd4 Kd6 52.Bb3 f6 53.Bd1 Nd7 54.h4 Nc5 55.Bc2 Ne6 56.Ke3 Ke5 57.Bb3 f4 58.Kf2 Nd4 59.Bf7 Nf5 60.h5 gh5 61.Bh5 Nd4 62.Bf7 Kd6 63.Ke1? (better is 63.Bh5–+) 63...Kc5 64.Kd2 Kb4 65.Kd3 f3 66.gf3 Nf3 67.Be8 Ne5 68.Kd4 Ka4 69.Kc3 Nf3 70.Bc6 Ng5 71.Bd7 (71.Kc4 f5–+) 71...Ne4 72.Kc4 Nc5 73.Bf5 Ka3 (74.Kc3 Ka2–+) 0–1. Saradjen,Janko (2150) – Praznik,Niko (2175), SLO–chT sf Skofja Loka, 1997.

4.Bb2 e6 5.Nf3 b6 6.Be2 Bb7 7.d3 d6 (7...Be7 8.0–0=) 8.Nbd2 Nbd7 9.0–0 (9.c4 Be7=) 9...Be7 10.c4 0–0 11.Qc2 Qc7 12.Rac1 (12.Rfe1 a4=) 12...Rac8 (12...Rfe8 13.Rcd1=) 13.Rfe1 Rfe8 14.h3 Nf8 15.d4 (15.Rcd1 e5=) 15...Ng6 (15...cd4 16.Nd4 e5 17.Nf5=) 16.Bd3 (16.dc5 Qc5 17.Red1 Red8=) 16...cd4 17.Bd4 (17.Bg6 hg6 18.ed4 d5=) 17...Nd7 (17...Ne5 18.e4=) 18.Qb1 Nc5 19.Bc2 Qd8 (19...Red8 20.Qb2=) 20.Ne4 (20.Red1 Qc7=) 20...f5 21.Ned2 (21.Nc5 bc5 22.Bb2 Bf3 23.gf3 Bf6=+) 21...Bf6 (21...Ne5 22.Be5 de5 23.Rcd1=+) 22.e4 (22.Bf6 Qf6 23.e4 Ne7=) 22...Bd4=+ 23.Nd4 Qf6 (better is 23...Nh4 24.g3 Qf6=+) 24.Nc6? (24.N4f3 Ne7=) 24...Rf8 25.Nf3 Bc6 26.bc6 Rc6 27.Rcd1 Ne5 28.Nd4 Rcc8 29.ef5 ef5 30.Nf5 g6?? 31.Rd6+– Nf3 32.gf3 Qg5 33.Ng3 Rf3 34.Be4?? Rg3= 35.fg3 Qg3=+ 36.Bg2 Qd6 37.Bd5 Kg7 38.Qb2 Kh6 39.Qd2 g5=+ 40.Qg2 Rf8 41.Re3 Qf4 42.Qe2 Qd4 43.Kg2 Rf4 44.Re7 b5 45.Bg8+= Ne4 46.Rh7 Kg6 47.Qh5 Kf5 48.Qf7 Qf6?? 49.Qd7 Ke5 (49...Kg6 50.Rh6!! Kh6 51.Qh7#) 1–0. Saradjen,Janko (2205) – Praznik,Anton (2205), SLO–chT West, 2001.

4.Bb2 e6 5.Nf3 b6 6.Be2 d5 7.0–0 =.

4.Bb2 e6 5.Nf3 d5 6.Be2 =.

4.c4 e6 5.Nf3 b6 6.Bb2 Bb7 7.Be2 d5 8.0–0 Nbd7 9.Qc2 Bd6 10.cd5 ed5 11.Nh4 g6 12.f4 Qe7 13.Nf3 0–0–0 14.Nd4 Nb8 15.Bf3 Bc7 16.Ba3 Qd7= 17.Nc3?? cd4–+ 18.Na4 Qb5 19.Be2 d3 20.Bd3 Qc6 21.Qb3? d4 22.Rf3 Qe6 23.Bc4 Bd5 24.Rc1 Nbd7 25.ed4 Bc4 26.Rc4 Nd5 27.Qb5 Rhe8 28.Rc6 Qe4 29.Rc4?? f5 30.Bd6+= Re6? 31.Nc3 Nc3?? 32.Qa6 (32.Qa6 Qb7 33.Rc7 Kb8 34.Qb7; 32.Rc7 Kb8 33.Rd7 Rd6 34.Rd8 Kc7 35.Rd7 Rd7 36.Rc3 Kb8 37.Qb6 Qb7 38.Qa5 Qd5 39.Qb4 Rb7 40.Qf8 Ka7 41.Ra3 Kb6 42.Qf6 Kc7 43.Qe7 Kb8 44.Qe8 Kc7 45.Rc3 Kb6+–) 1–0. Saradjen,Janko (2205) – Praznik,Niko (2240), SLO–ch Kranj, 1999.

4.d4 cd4 5.ed4 d5 =.

4.Nf3 g6 5.c4 Bg7 6.Bb2 0–0 7.d4 d6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6 5.d4 Bg7 6.Nf3 0–0 7.c4).

3.e4 b6

4.Nc3 Bb7 5.Nf3 Nf6 6.e5 Nd5 7.Nd5 Bd5 8.c4 Bb7 9.d4 cd4 10.Be2 d5 11.0–0 dc4 12.Bc4 e6 13.Nd4 Bc5 14.Be3 0–0 15.Qh5 Nd7 16.Rfd1 Qc7? 17.Ne6!+– fe6? 18.Be6 Kh8 19.Rd7 1–0. marekt (2195) – ElMorito (1710), ICC, 2003.

4.Nf3 Bb7 5.d3 e6 6.Be2 Nf6 7.e5 Ng8 8.0–0 d5 9.d4 Nd7 10.c3 g6 11.Bf4 Bg7 12.Re1 Ne7 13.Na3 0–0 14.Qd2 cd4 15.cd4 h5 16.Rac1 Nf5 17.Bd3 Qe7 18.Rc7 Rab8 19.Bf5 ef5 20.Ng5 Rfc8 21.e6 Rc7 22.ef7 Kh8 23.Re7 1–0. b4_player (2060) – pablo, GameColony.com, 2002.

3.e4 d5

4.ed5 Qd5 5.Nc3 Qd6 6.Bc4 Nf6 7.Nf3 Bg4 8.0–0 Nbd7 9.Re1 b6 10.Re3 0–0–0? (Better is 10...Rd8+=) 11.Bf7+– g6 12.Qe2 h5 (12...e5 13.h3 Bf5 14.g4+–) 13.Bg6 Rg8 (13...Bh6 14.Rd3 Qe6+–) 14.Bf7 Rg7 15.Be6 Kb7 16.h3 Bh3 17.Bh3 Ng4 18.Re6 Qf4 19.d4! Qf7 20.Qe4 Ka7 21.Rc6 1–0. b4_player (2225) – bak (1980), GameColony.com, 2003.

4.ed5 Qd5 5.Nc3 Qd8 6.Nf3 b6 7.Bc4 Bb7 8.0–0 Nf6 9.d3 e6 10.Qe2 Qc7 11.Ne4 Nbd7 12.Neg5 h6?? (Better is 12...Bf3 13.Nf3 Bd6+=) 13.Nf7!+– Kf7 (13...Bf3 14.Qe6 Be7 15.Nh8 Bh5+–) 14.Qe6 Kg6 15.Nh4 Kh5 16.Qf5 g5 17.Bf7 Kh4 18.Qh3# 1–0. marre (2025) – torcida (1905), GameColony.com, 2003.

4.ed5 Qd5 5.Nc3 Qe5 6.Be2 Bg4 7.f4 Qe6 8.h3 Be2 9.Nge2 Nf6 10.0–0 g6 11.f5 gf5 12.Ng3 Rg8 13.Nf5 Na6?? (better is 13...Nbd7+=) 14.ba6+– Ra6 15.Qf3 Qc6 16.Rb1 Qf3 17.Rf3 b6 18.Rd3 Ra8 19.Rb6 e6 20.Nb5 Rc8 21.Nc7! Rc7 22.Rb8 Rc8 23.Rc8# 1–0. Woelfelschneider,Peter – Rueckel, 2010.

4.e5 Bf5 5.d4 e6 6.Bd3 Bd3 7.Qd3 Nd7 8.c3 a4 9.Nf3 Qb6 10.0–0 c4 11.Qc2 Qb5 12.Na3 ½–½. shaip (2330) – PassedPawn (2420), ChessWorld.net, 2003.

3.e4 d6

4.Nf3 e5 5.c4 g6 6.Nc3 Bh6 7.d3 Bc1 8.Qc1 Nd7 9.Be2 Nf8 10.Nd5 Ne6 11.0–0 h6 12.Qb2 Ne7 13.g3 0–0 14.Rae1 Nd5 15.ed5 Ng5 16.h4 Nf3 17.Bf3 f5 18.Kg2 b6 19.Rh1 h5 20.Qd2 Ra7 21.Reg1 Qf6 22.Rf1 Re7 23.Bd1 f4 24.Bf3 Ref7 25.Qd1 Kg7 26.Qe1 Rg8 27.Be4 Kf8 28.Qd1 Ke7 29.Qe2 Kd8 30.Bf3 Rfg7 31.Rfg1 fg3 32.Kf1 gf2 33.Kf2 Rf8 34.Rg3 Rgf7 35.Kg2 Qf4 36.Be4 Bg4 37.Qe1 Qf2 38.Qf2 Rf2 39.Kg1 Ra2 40.Rg2 Ra1 41.Kh2 Rh1 42.Kh1 Rf1 43.Kh2 Re1 44.Bg6 a4 0–1. Luzuriaga,Norberto Horacio (2095) – Kurpnieks,Vairis (2115), CP–2010–P–00025, 2010.

4.Nf3 e6 5.Be2 Nf6 6.d3 Be7 7.0–0 0–0 8.Qd2 Nbd7 9.Re1 d5 10.e5 Ng4 11.d4 cd4 12.Bd1 f6 13.Nd4 Nf2 (13...Nge5? 14.Ne6 Qb6 15.Nf8 Kf8 16.Qd5+–) 14.Qf2 (< 14.Kf2 fe5 15.Kg1 Qb6–+) 14...Bc5 15.ef6 Nf6 16.c3 Ne4 17.Qe3 e5 18.Ba3 ed4 19.cd4 Ba3 20.Na3 Bf5 21.Bf3 Qd7 22.Nb1 Rac8 23.Be4 Be4 24.Nc3 Rce8 25.Qd2 Qg4 26.Rf1 Bg2=+ 27.Qg2 Qd4 28.Kh1 Qc3 29.Qd5 Kh8 30.Qb7 Rf2 31.Rf2 Qa1 32.Kg2 Qe5 33.Qf7 Qg5 34.Kh1 Re1 ½–½. Walker,John T (1965) – Vieito Soria,Luis M (2020), England (BCCA) – Spain, 2006.

3.e4 e5

4.Nc3 b6 5.Nf3 d6 6.Bc4 Be6 7.d3 Nd7 (better is 7...Bc4!? 8.dc4 Nf6+/–) 8.Be6+– fe6 9.Ng5 Qf6 10.Qg4 0–0–0? (better is 10...h5 11.Qe6 Qe6 12.Ne6 Rc8+–) 11.Ne6 h5 (11...Re8 12.Nc7!! Rd8 13.N7d5+–) 12.Qh3 Re8 13.Nc7!! Rd8 (13...Kc7 14.Nd5 Double attack) 14.N3d5 (better is 14.N7d5 Qf7 15.Nb6 Kc7 16.Ncd5 Kb8+–) 14...Qg6 15.Ne6 Qg4 16.Qg4 hg4 17.Nd8 Kd8 18.h4 gh3 19.Rh3 Rh3 20.gh3 Ngf6 21.Bg5 Ke8 (21...Be7 22.Bf6 Bf6 23.Ke2+–) 22.Bf6 gf6 23.Ke2 Kf7 (23...Bh6 24.Rg1 Kf8 25.h4+–) 24.Rg1 Bh6 25.h4 Ke6 (25...a4 26.a3+–) 26.Rg8 Bf8 1–0. capablancaven (1900) – cornishman (1730), gameknot.com, 2011.

4.Nc3 Nf6 5.Nf3 d5 6.ed5 Nd5 7.Ne5 Nc3 8.dc3 Qd1 9.Kd1 Bd6? (better is 9...Nd7!? 10.Nc4 Nf6+/–) 10.Nc4+– Bc7 (10...Ke7 11.Nb6 Ra7 12.Nd5 Ke8 13.b6+–) 11.b6 Bd8 12.Nd6 Kd7 13.Nf7 Re8 14.Bb5 Nc6 15.Nd8 Rd8 16.Re1 Re8 (16...Rf8 17.Ke2 Ke7 18.Bc6 bc6 19.Bg5 Kf7 20.Kf3+–) 17.Rb1 Re1 18.Ke1 1–0. capablancaven (1910) – carlog (1775), gameknot.com, 2011.

2.b5 d6

3.a4 b6 4.Nf3 g6 5.Bb2 Nf6 6.e3 Bg7 7.g3 0–0 8.Bg2 Bb7 9.0–0 Nbd7 10.c4 e5 11.d3 Nc5 12.Nc3 Qd7 13.Ne5 de5 14.Bb7 Nb7 15.Nd5 Nd5 16.cd5 Qd5 17.e4 Qd6 18.Ba3 Nc5 19.Rc1 Rfd8 20.Bc5 bc5 21.Qc2 Bf8 22.Qc3 Qd3 23.Qe5 Bd6 24.Qd5 Qd5 25.ed5 Re8 26.Rfd1 Re4 27.Ra1 Rae8 28.Ra2 Re2 29.Ra3 Rb2 30.Rf1 Ree2 31.Kg2 Red2 32.Re3 Rd5 33.Re8 Kg7 34.Ra8 Rd4 35.Ra5 Rbb4 36.Ra1 h5 37.f4 Rd2 38.Kf3 Rd3 39.Kg2 Rb2 40.Kh3 Bf4 41.Ra7 Kh6 42.Rf1 g5 43.b6 Rb6 44.Ra8 Kg7 45.Rf2 Rbb3 46.a5 Ra3 47.a6 f5 48.a7 h4 49.Kg2 hg3 50.hg3 Rg3 51.Kf1 Ra1 52.Ke2 Rga3 53.Rg2 Ra7 54.Ra7 Ra7 55.Kd3 Ra4 56.Rc2 c4 57.Ke2 Kf6 58.Kf3 Ra3 59.Ke2 c3 60.Kd3 g4 61.Kc4 g3 62.Kb4 Ra8 63.Rc3 g2 64.Rc2 g1Q 65.Rc6 Bd6 66.Kc4 Ra4 67.Kb5 Rb4 68.Ka6 Qa1 0–1. rryy44 – vwj, kurnik, 2012.

3.a4 Nd7 4.Nf3 Ngf6 5.e3 g6 6.Be2 Bg7 7.0–0 0–0 8.c4 d5 9.Bb2 dc4 10.Na3 Nb6 11.Nc4 Nbd5 12.Qb3 b6 13.Ba3 Ne4 14.Rac1 Bb7 15.d4 g5 (15...Bf6 16.Nfe5+/–) 16.Nce5 g4 17.Ng4 Kh8 (17...Qc8 18.Nge5 Be5 19.de5 Kg7+–) 18.Nge5 Qe8 19.Nc6 Bc6 (19...Qd7 20.Bc4 Nb4 21.Nfe5 Be5 22.Ne5+– (22.de5?! Qf5+/–)) 20.Rc6 (20.bc6?! Rd8+–) 20...Rd8 (20...Qd8 21.Bd3 f5 22.Bc4+–) 21.Bc4 Nef6 (21...Nb4 22.Rc7 Rd7 23.Rd7 Qd7 24.Bf7+–) 22.e4! Nb4 (22...Ne4 23.Bd5 Deflection) 23.Bb4 (23.Rc7?! Ne4 24.Bb4 ab4+–) 23...ab4 24.e5 Nh5 (24...Ne4 25.Re1 Nc3+–) 25.Ng5 e6 (25...Rd4 26.Qb1 f5 27.ef6 Nf6 28.Rf6+–) 26.Qd3 f5 27.Ne6 Nf4 28.Nf4 Qc6 (28...Be5 29.Ne6 Rd7+–) 29.bc6 Be5 30.Ne6 1–0. pcmvr (2830) – sbeaulieu (2550), net–chess.com, 2014.

3.a4 e6 4.Bb2 Nf6 5.e3 (5.Nf3 e5=) 5...Be7 6.d4 (6.Nf3 0–0=) 6...0–0 (6...d5 7.Bd3=+) 7.Nf3= Nbd7 8.Bd3 b6 (8...c6 9.0–0=) 9.c4 Bb7 10.Nbd2 d5 11.Qc2 c6 12.0–0 cb5 13.cb5 Bb4 14.Rad1 Qe7 15.Ne5 Rac8= 16.Qb3 Ne5 17.de5 Nd7 18.Nf3 Nc5=+ 19.Qc2 Nd3 20.Qd3 Rc4 21.Rc1 Rfc8=+ 22.Nd4 Rc1= 23.Rc1 Rc1 24.Bc1 Qc7 25.Qc2 Qe5–/+ 26.Bb2 Qd6 27.Kf1? Qe5?? 28.Nf3 Qd6 29.Ke2 e5?? (30.Be5 Qe6=; better is 29...f6–+) 0–1. Vreeman,H – Harthimmer,Arne, corr NLD–DEN, 1995.

3.a4 g6 4.Bb2 e5 (4...Nf6 5.Bf6 ef6 6.e3=) 5.e3 (5.Nf3 Nf6=) 5...Bg7 6.Nf3 Ne7 (6...Nf6 7.Be2=) 7.c4 (7.Be2 0–0=) 7...0–0 8.Nc3 (8.d4 e4 9.Nfd2 f5=) 8...Nd7 (8...f5 9.d4=) 9.Be2 Nc5 (9...e4 10.Nd4 Nc5 11.Qc2+=) 10.d3 (10.d4 ed4 11.ed4 Ne6+=) 10...f5 (10...e4 11.de4 Ne4 12.Nd4=) 11.Nd2 f4= 12.e4 g5 13.Ba3 Be6 14.Bc5 dc5 15.Nd5 Qd7 16.Rb1 b6 17.h3 Ng6 18.Bg4+= Rf7 19.Be6 Qe6 20.Qg4 Qd6 21.Nf3 h6 22.h4 gh4 23.Nh4 Nh4 24.Rh4 Kh7 25.f3 Rg8+= 26.Qh3 Bf8 27.Kf2 Rg3= 28.Qh1 Rfg7 29.Rg1 Qg6 30.Rh5 Bd6 31.Nc3 Rg5= 32.Rh3 Bf8 33.Qh2 Rg3 34.Qh1 Rd7 35.Nd5 ½–½. Scheidacker,Mirko – Kuehn,Bodo, Spree op, 1997.

3.Bb2 b6 4.Nf3 Bb7 5.e3 (--> 2.b5 b6 3.e3 Bb7 4.Bb2 d6 5.Nf3).

3.Bb2 Nd7 4.e3 c6 5.bc6 bc6 6.Nc3 e5 7.Rb1 Ne7 8.f4 ef4 9.ef4 Ng6 10.Qe2 Be7 11.Qf3 Ba6 (11...d5 12.Bd3=) 12.Qc6 Bf1 13.Kf1 0–0 (13...Nf4 14.Nb5 Rc8 15.Nd6 Bd6 16.Qd6=) 14.g3 Rc8 15.Qa4 Nc5 16.Qc4 Qd7 17.Qd5 Bf6 18.Nge2 Rfd8 (18...Rfe8 19.Kf2=) 19.d4 Ne6 20.Ne4 Nc7 (better is 20...Be7!? 21.Nf2 Rc2+=) 21.Nf6+/– gf6 22.Qb3 (22.Qa5!? Ra8 23.Qd2+/–) 22...Qh3 23.Kf2 Re8 24.c4 (24.Qf3 Nd5 25.c3 Ne3=) 24...Ne6 (better is 24...Re2!? 25.Ke2 Qg2 26.Kd3 Qf3 27.Kd2 Qg2 28.Kd3 Qf3 29.Kd2 Qg2 30.Kd3=) 25.Qc3 Qg4 (25...Qf5 26.h4+/–) 26.Qc2 d5 27.c5 Ng7 28.Rhe1 (28.Qd3 Re4+–) 28...Re4 (28...Qh3 29.Kg1 Qg4 30.Nc3 Nf4 31.Qd2 Re1 32.Re1 Nh3 33.Kh1+–) 29.Qd2 (29.Ng1 Qf5 30.Nf3 Ne6+–) 29...Nf5 30.Qa5?? (better is 30.Ng1!?+–) 30...Rce8 (30...Ngh4 31.gh4 Nh4–+) 31.Ng1+= Nf4 32.Qd2 (32.gf4 Rf4) 32...Nh3 (32...Qh5 33.Nf3 Nh3 34.Kg2 Ne3 35.Re3 Re3–+) 33.Nh3+/– Qh3 34.Kg1 Ng3 35.Re4 (35.hg3 Qg3) 35...Ne4 36.Qf4 Qd3 37.Qf1?? (better is 37.Rf1=) 37...Qe3–+ 38.Kh1 Kh8 (39.Re1 Nf2 40.Qf2 Qf2 41.Re8 Kg7–+) 0–1. Bonetti,Shane – RUSH7, ICC, 2002.

3.Bb2 e5 (--> 1.b4 a5 2.b5 e5 3.Bb2 d6).

3.Bb2 e6 4.e3 (4.Nf3 Nf6=) 4...Nf6 5.c4 (5.Nf3 Be7=) 5...Be7 6.Nf3 (6.d4 0–0=) 6...0–0 7.Be2 b6 (7...e5 8.0–0=) 8.a4 (8.0–0 c6=) 8...Bb7 9.0–0 Nbd7 10.d4 Ne4 11.Nc3 Ndf6 12.Nd2 Nd2 13.Qd2 Ne4 14.Ne4 Be4 15.f3 Bf5 16.e4 Bg6 17.Bd3 Bf6 18.Rad1 e5+= 19.de5 de5 20.Qc3 Qc8 21.c5+/– Rd8 22.Ba3 Qd7 23.Bc2 Qe8 24.Bb3 Rd4 25.Rd4 ed4 26.Qd3 Rd8 27.Bd5?? Rd5!–+ (28.cb6 cb6–+) 0–1. Schuhler,Ernst – Harthimmer,Arne, corr 3GMM–45, 1995.

3.Bb2 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6).

3.c4 Qd7 4.Bb2 Qg4 5.e3 Qe4 (5...Qd1!? 6.Kd1 e5=) 6.Nf3 Bg4 7.Be2 Nf6 8.d3 Qf5 9.e4 Qc5 10.0–0 Nbd7 11.Nbd2 Ne5? (11...e5 12.d4 ed4 13.Bd4+/–) 12.a3?? (12.d4 Qb4 13.Rb1 (13.de5?! Qb2 14.ef6 Qf6+–) 13...Bf3 14.gf3+– (14.Nf3?! Nf3 15.gf3 a4+/–; 14.Bf3?! Nf3 15.gf3 a4+=)) 12...Nf3 13.Bf3 Bf3 14.Nf3 0–0–0? 15.Bd4 Qh5+/– 16.h3 e5 17.Be3 h6 18.Nd2 g5 19.Qh5 Nh5 20.g4 Nf6 21.Kg2 Be7 22.Nb3 b6 23.f3 Nd7 24.d4 ed4 25.Bd4 Rhg8 26.Rac1 Nc5 27.Bc5 dc5 28.Rcd1 Rd1 29.Rd1 Bf6 30.Rd5 Bb2 31.a4 Bc3 32.Nc1 Bb4 33.Ne2 Rf8 34.f4 Kb7? 35.fg5+– c6? 36.bc6 Kc6 37.gh6 Rh8 38.g5 Bd2 39.h4 Be3 40.Kf3 Bd4 41.Nd4 cd4 42.Rd4 Kc5 43.Rd7 Kc4 44.Rf7 Kb4 45.Rb7 Ka4 46.Rb6 Ka3 47.Kg4 a4 48.Kh5 Ka2 49.g6 a3 50.g7 Rg8 51.Ra6 Kb3 52.Kg6 Re8 53.h7 Re4 54.Ra3! Ka3 55.g8Q Rg4 56.Kf6 Rf4 57.Ke5 Rh4 58.h8Q Rh8+– 59.Qh8 (59.Qh8 Kb2 60.Kd5 Kb3 61.Qa1 Kc2 62.Kd4 Kb3 63.Qb1 Ka4 64.Kc4 Ka5 65.Qb5#) 1–0. olawoj – ryszardls1950, kurnik, 2012.

3.d3 g6 4.Bb2 Nf6 5.a4 Bg7 6.Nf3 0–0 7.e3 Nd5 (7...e5 8.Be2=) 8.Bg7+= Kg7 9.Be2 e6 (9...e5 10.0–0+=) 10.0–0 Qf6 11.d4 c5 12.c3 Nd7 13.Qb3 N7b6 (13...b6 14.Nbd2+=) 14.Nbd2 e5 15.Ne4 Qe7 16.Rfd1?? (16.de5 de5 17.Rad1 f5=) 16...f5 (better is 16...ed4 17.Ng3 Nc3–+) 17.Ned2= e4 18.Ne1 f4 19.dc5 dc5 20.c4 Nb4? 21.ef4+/– Rf4 22.Qg3 Rh4 23.Nf1 Be6? 24.Qe5?? Kg8?? 25.Qc5 Qc5–+ 26.Ne3 Rf8 27.g3 Rf2! 28.Kf2 Rh2 29.N1g2 Nc2 (29...Nc2 30.Kg1 Rh3–+) 0–1. Fournier,Frederic (1815) – Antiochus (1655), Active, 2006.

3.d4 Bf5 4.Nf3 Nd7 (4...e6 5.e3=) 5.Nc3 e5 (5...Ndf6 6.Nh4 Bg4 7.h3=) 6.Bg5 (6.e4 Bg4+=) 6...Be7= 7.e4 (7.Be7 Ne7 8.e4 Bg4=) 7...ed4 8.Qd4 Bg5 9.Ng5 Qg5 10.Nd5 0–0–0 (10...Kd8 11.ef5 Nh6=+) 11.ef5?? (better is 11.Qc3 Nc5 12.Qa5+/– (< 12.ef5 Re8 13.Ne3 Ne4–/+)) 11...Re8–/+ 12.Ne3 (12.Kd1 Ngf6 13.Nf6 Nf6–/+ (13...gf6?! 14.g4=+)) 12...Nh6 13.Be2 Nf5 14.Nf5 Qf5 15.Qd3 Qd3–+ 16.cd3 Re5 17.d4 Re4 18.Rd1 Rhe8 19.Rd2 Nf8 20.d5 Rb4 21.0–0–/+ Ng6 22.h3 Nf4 23.Bg4 Kb8 24.g3–/+ h5 25.a3 Rbe4 26.Bf3 Ne2 27.Kg2 R4e5 28.Rb1 Nc3 29.Rb3 Na4 30.Rc2 Nc5 31.Rbc3 R8e7 32.Rd2 Ne4 33.Be4–/+ Re4 34.f3 Re2–+ 35.Re2 Re2 36.Kf1 Rd2 37.a4 Rd5 38.Re3 Re5 39.Rd3 Ka7 40.Kf2 Kb6 41.g4 hg4 42.hg4 Re7 43.Rd5 g6 44.Kg3 Re3 45.Rd4 Kc5 46.Rf4 Re7 47.g5 d5 (48.Rh4 d4–+) 0–1. Vettenburg – Doossche, corr Belgium, 1994.

3.e3 e5 4.d4 ed4 (4...e4 5.d5=) 5.ed4 Nf6 6.Nf3 Bg4 7.h3 (7.Be2 Be7=) 7...Bh5 (7...Be6 8.Bd3+=) 8.Bd3 (8.Be2 Be7=) 8...Nbd7 (8...Qe7 9.Kd2 Bg6 10.Re1 Ne4 11.Be4 Be4 12.Nc3+=) 9.c4 (9.0–0 Be7+=) 9...Be7 (9...d5 10.c5+=) 10.Nc3 (10.0–0 0–0+=) 10...Nf8 (10...0–0 11.0–0+=) 11.0–0 Ne6 12.Be3 g5 (12...0–0!?+=) 13.g4+/– Bg6 14.Ng5 Qd7 (14...Ng4 A) 15.Qg4?! Bd3 (15...Ng5 16.Bg5 Bd3 17.Rfe1+–) 16.Ne6 fe6=; B) 15.Ne6 Ne3 16.Ng7 Kf8 17.fe3 Kg7 18.Be4+=) 15.Ne6 Qe6 (15...fe6 16.g5 Ng8 17.Qd2+/–) 16.Bg5 (better is 16.Re1 Qd7 17.Bg5+–) 16...Qd7? (better is 16...0–0–0+/–) 17.Re1+– 0–0–0 (17...0–0 18.Re7! Qe7 19.Qf3+–) 18.Re7! Qe7 19.Qf3 (19...Bd3 20.Bf6+–) 1–0. Bulcourf,Carlos (2295) – Asprelli,Cristian, Vicente Lopez op, 1993.

3.e3 e6 4.Bb2 Nf6 5.a4 (5.Nf3 e5=) 5...Be7 6.Be2 0–0 7.Nf3 Nbd7 (7...e5 8.0–0=) 8.0–0 (8.d4 c5=) 8...b6 (8...e5 9.d3=) 9.c4 Bb7 10.d3 (10.Nc3 Rc8=) 10...Qe8 (10...Nc5 11.Nc3=) 11.Nd4 (11.Nc3 Rd8=) 11...Ne5 12.Nc3 Qd7 13.f3 Ng6= 14.Qd2 Rfd8 15.Ba3 e5 16.Nc2 c6 17.bc6 Bc6 18.d4 ed4 19.Nd4+= Ba4 20.Na4 Qa4 21.Bd6 Qe8 22.Be7 Qe7 23.Qc3 Rac8 24.Qb3?? Rd4!–+ 25.ed4 Qe2 26.Qb6 Nf4 27.Rf2 Qc4 28.h3 Ne2 29.Kh1 Nd4 30.Rd2 Nc6 31.Qa5 Kh8 32.g3?? Re8 33.Qb6 Qb5?? 34.Rdd1 Nd8 35.Rdc1 Qb3 36.Qb5 Re7 37.Qd7 Qb7 38.Qa4?? Qa8 39.Qa3 Qd5?? 40.Rab1?? Qd3?? (41.Qd3 Rd7 42.Qd7 Nd7+–; better is 40...Re8–+). Mennie – Harthimmer,Arne, corr 3GMM–45, 1996.

3.e3 Nf6 4.Bb2 g6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6).

3.e4 e5 4.Nc3 f5 5.ef5 Bf5 6.Qf3 Qc8 7.Bd3 Be6 8.Nh3 Bg4 9.Qe3 Bh3 10.gh3 g6 11.Be4 Nd7 12.d4 Bh6 13.Qf3 Rb8 14.Bh6 Nh6 15.de5 de5 16.Nd5 c6 17.Nf6 Nf6 18.Qf6 Nf7 19.bc6 Qh3 20.cb7 Qc3 21.Ke2 Qc4 22.Bd3 Qd5 23.c4 Qd6 24.Qd6 Nd6 25.c5 (25...Nb7 26.Rab1+–) 1–0. Woelfelschneider,Peter – Blankenberg,Bruno, 3. B4 Thementurnier, 2000.

3.Nf3 Nf6 4.Bb2 =.

3.a4 e5

4.Bb2 (--> 1.b4 a5 2.b5 e5 3.Bb2 d6 4.a4).

4.d4 =.

3.a4 Nf6

4.Bb2 e5 (--> 1.b4 e5 2.Bb2 d6 3.b5 Nf6 4.a4 a5).

4.e3 e5 5.Bb2 Be7 6.d3 0–0 7.Nd2 c6 8.Ngf3 Bg4 9.Be2 Nbd7 10.Rg1 Re8 11.c3 Nc5 12.Qc2 Bf8 13.0–0–0? (13.d4 Ncd7=) 13...Qb6 14.Ne4 Nfe4 15.de4 Be6 16.Nd2 Rac8 17.h4 cb5 18.ab5 a4 19.Nc4 Bc4 20.Bc4–/+ a3 21.Ba1 Na4?? 22.Qb3?? Qc7=+ 23.Bd5 Nc3 24.Bc3 Qc3 25.Qc3 Rc3 26.Kd2 Rec8 27.Rc1 Rc1 28.Rc1 Rc1 29.Kc1 b6 30.Kc2 Be7 31.Kb3 Bh4= 32.Ka3? Bf2–+ 33.Kb4 Be3 34.Kc4 g5 35.Bb7 Kg7 36.Kd5 Bc5 37.Bc8 h5 38.Bf5 Kh6 39.Bd7 g4 40.Be8 Kg6 41.Kc6 h4 42.Bd7 h3! 43.Bf5 Kg5 44.gh3 g3 45.h4 Kh4 (46.Kd5 g2–+) 0–1. Heindrich,Janos (2145) – Toth,Daniel (2125), Infotozsde Cup Red Gr 8th, 2001.

3.Bb2 Bd7

4.e3 c6 5.c4 e5 6.Be2 Nf6 7.Nc3 Be7 8.d3 0–0 9.Nf3 Qc7 10.0–0 d5 11.cd5 cd5 12.Rc1 Qd6 13.a4 Be6 14.Nb1 e4 15.Bf6 Bf6 16.de4 Rd8 17.ed5 Bd5 18.Nc3 Bc3 19.Rc3 Qb4?? 20.Rd3+– 1–0. Bonetti,Shane – justinc (1815), ICC, 2002.

4.e3 e6 5.a3 Nf6 6.Nf3 g6 (6...e5 7.Nc3=) 7.Be2+= Bg7 8.0–0 0–0 9.d4 Qe8 10.c4 b6 11.Nbd2 Bc8 12.Qc2 Bb7 13.Rfe1 Nbd7 14.Rac1 e5 15.de5 (15.Rcd1 Qe7+=) 15...Ne5 (15...de5 16.e4+=) 16.Ne5+/– de5 17.Nf3 (17.c5+/–) 17...c6? (better is 17...Be4!? 18.Qc3 Bf3 19.Bf3 e4+=) 18.Ne5+/– cb5 19.cb5 Nd7 (19...Be4 20.Qa4+–) 20.Nd7 Bb2 21.Qb2 Qd7 22.Red1 Qe6 23.Qd4 Rad8 24.Qf4 Qa2? 25.a4?? Qe2–+ 26.Rd8 Rd8 27.h3 Rd1 28.Rd1 Qd1 29.Kh2 Qd5 30.f3 g5?? 31.Qb8 Kg7+= 32.e4? Qd7–+ 33.Qe5 f6 34.Qb8 Qe7 35.Kh1 h5 36.Kg1 Qc5 37.Kh2 Qe5 38.Qe5 fe5 39.Kg1 Bc8 40.Kf2 Be6 41.Ke3 Bb3 42.Kd3 Ba4 43.Kc4 Bd1 0–1. Fournier,Frederic (1755) – afevir(C), Active, 2006.

3.c4 e5

4.e3 f5 5.Qh5 g6 6.Qd1 Nf6 7.a4 Bg7 8.Bb2 0–0 9.Qb3 Re8 10.Nf3 e4 11.Nd4 Nbd7 12.Qc2 Ng4 13.Be2 Nc5 14.0–0 Ne5 15.Nb3 Be6 16.Nc5 dc5 17.Na3 Qd6 18.f4 ef3 19.Bf3 Nf3 20.Rf3 Bb2 21.Qb2 Rad8 22.Rf2 b6 23.Rc1 Bf7 24.Rc3 Re4 25.Qc1 Qe5 26.Nb1 Kg7 27.Rf3 g5 28.g3 Bh5 29.Rf2 Rd6 (29...f4!? 30.gf4 gf4–/+) 30.Qf1= Bg4 31.Rd3 (31.Rc1 f4 32.Nc3 fg3 33.hg3 Qg3 34.Rg2 Re3 35.Rg3 Rg3 36.Kh2 Rh3 37.Qh3 Bh3 38.Kh3 Rd3 39.Kg2 Rd2 40.Kg1 Rd7=) 31...Rd3 (better is 31...Bh3! 32.Qh3 Rd3 33.Rf5 Qe7=) 32.Qd3+= Qe6 33.Qd8 Rc4 34.Qg5+= Kf7 35.Nc3 Ke8 36.Qg7+/– Qf7 37.Qe5 Qe7 38.Qd5 Rb4 39.Rf4 Rb2 40.e4+/– Rc2 41.e5 Rc1 42.Rf1 ½–½. Francke,Dirk – Thynne,Trefor F, Dresden GER, 2013.

4.Nf3 =.

3.c4 Nf6

4.a4 e5 5.Nf3 =+.

4.a4 Bf5 5.Nc3 Nbd7 6.Nf3 e5 7.d3 Be7 8.Bb2 0–0 9.h3 Nc5 10.e4 Bd7 11.Be2 c6 12.Qc2 cb5 13.ab5 b6 14.g3 h6 15.d4= ed4 16.Nd4 Re8 17.0–0–0? Bf8 18.Bf3 Rc8 19.e5? de5–+ 20.Nc6 Qc7 21.Nd5 Nd5 22.Bd5 a4 23.Rde1 Bd6 24.Re3 Be6 25.Rhe1 Bd5 26.cd5 f6 27.f4 e4 28.Kb1 Nd3 29.R1e2 Bc5?? 30.Re4–/+ Re4 31.Re4 Nb2 32.Kb2 a3 33.Ka2 Qd7 34.Qc4 Qh3 35.Ne7?? Be7–+ 36.Qe2 Bf8 (37.Rd4 Bc5–+) 0–1. Roibal,Felisardo – Ferreira,Luis, URU–ch prel Roja, 2001.

4.Nc3 e5 5.Nf3 =.

4.d4 Be6 5.e3 g6 6.Nf3 Bg7 7.Bd3 d5 8.cd5 Nd5 9.0–0 0–0 10.Na3 Nb4 11.Bb1 c5 12.bc6 N8c6 13.Bb2 Rc8 14.Qe2 Bg4 15.h3 Bf3 16.Qf3 Qd7 17.Rd1 Rfd8 18.Nc2 Ne5 19.Qe2 Na6 20.Na3 Nc6 21.Bd3 Nab4 22.Bc4 Qf5 23.Rac1 e6 24.Nb5 Kf8 25.e4 Qf4 26.a3 Na6 27.g3 Qg5 28.h4 Qe7 29.d5 ed5 30.Bg7 Kg7 31.ed5 Qe2 32.Be2 Ne5 33.Rc8 Rc8 34.Nd6 Rc2 35.Ba6 ba6 36.f4 Ng4 37.Ne4 Ne3 38.Rd3 Nc4 39.d6 Rc1 40.Kf2 Nb2 41.Rb3 Rc2 42.Kf3 f5 43.Ng5 Nc4 44.Rb7 Kf8 45.Nh7 Kg8 46.d7 Nd2 47.Ke3 Nf1 48.Kd4 Rd2 49.Ke5 Ng3 50.Ng5 Re2 51.Kf6 Nh5 52.Kg6 Nf4 53.Kf5 Rd2 54.Kf4 Rd1 55.Rb8 Kg7 56.d8Q Rd8 57.Rd8 a4 58.Ra8 a5 59.Ra5 Kf8 60.Ra4 Ke7 61.Ra7 Kd6 62.Ne4 Kc6 63.h5 Kb6 64.h6 Ka7 65.h7 Kb6 66.h8Q Kb5 67.Qe5 Ka4 68.Qb2 Ka5 69.Qb4 Ka6 70.Nc5 Ka7 71.Qb7# 1–0. EnginMax20 – Noonian212a, 2001.

4.d4 Bf5 =.

4.Nc3 g6

5.e4 c5 =.

5.g3 Bg7 6.Bg2 0–0 7.d4 e5 8.Nf3 e4 +=.

5.g3 Bg7 6.Bg2 0–0 7.e3 e5 8.Nge2 Nbd7 9.Ba3 e4 10.Rc1? Ne5–+ 11.Ne4 Nd3 12.Kf1 Nc1 13.Qc1 Ne4 14.Be4 Rb8 15.Kg2–/+ Re8 16.d3 Be6 17.h4 d5 18.Bf3 dc4 19.Rd1 Qf6 20.Nd4 cd3 21.Rd3 Bf5 22.Rc3 Be4 23.Rc7 Bf3 24.Nf3 h6 25.Nd4 g5 26.hg5=+ hg5 27.Qc2 Qe5 28.Qc4 Qe4 29.Kg1 Qg6 30.Nf3 Bf6 31.Qg4 Rbd8 32.Kg2 Re4–/+ 33.Qc8?? Rc8–+ 34.Rc8 Kh7 35.b6 Re6 36.Bc5 Qe4 (37.Bd4 g4–+) 0–1. Bulcourf,Carlos (2205) – Llanos,Guillermo (2385), Buenos Aires Konex, 1991.

5.g3 Bg7 6.Bg2 0–0 7.e3 Bg4 8.Qa4 d5 9.d4 =.

5.g3 Bg7 6.Bg2 c5 7.Bb2 Nbd7 8.Nf3 Rb8 (8...Nb6 9.d3=) 9.0–0+= 0–0 10.e3 Nb6 11.d3 Bg4 12.h3 Bf5 13.g4 Bd7 14.Nd2 Qc8 15.Qf3 Ne8 16.Rab1 e5 17.Nd5 Nd5 18.Qd5 Be6 19.Qf3 f5 20.gf5 gf5 21.Qh5 f4= 22.Ne4 Nf6 23.Nf6 Rf6 24.ef4 Rh6 25.Qf3 Bh3 26.Bh3 Rh3 27.Qd5+= Kh8 28.fe5 Qf5 29.Rfd1 Rf8 (30.Rf1 Be5 (30...de5?! 31.Qe4–+) 31.Be5 de5 (31...Qe5?! 32.Qe5 de5 33.Rfe1=+) 32.Qb7 Rg8 33.Qg2 Rg2 34.Kg2 Qg4#) 0–1. Woschkat,Karl_Heinz – Keenan,G, Telecomm, 1995.

3.e4 Nf6

4.Nc3 Nbd7 5.d4 e5 6.Nf3 Be7 7.Bd3 0–0 8.0–0 ed4 9.Nd4 Nc5 10.f3 Bd7 11.Bc4 Qc8 12.Be3 Be6 13.Ne6 Ne6 14.Rb1 Rd8 15.Qe2 c5 (15...Re8 16.f4+=) 16.a4 b6 17.Rbd1 Ra7 18.f4 Ne8 (18...Nc7!?+/–) 19.Nd5 Rb7 20.f5 N6c7?? (better is 20...Nf8+–) 21.Ne7 (21.Ne7 Kh8 22.Nc8 Rc8 23.Bf7+–) 1–0. Stapinski,Ryszard (1905) – Zimmermann,Jan Erik (1610), LIPEAD40/pr42 (PER), 2012.

4.Nc3 Nbd7 5.Nf3 Nc5 6.Ng5 h6 7.d4 hg5 8.dc5 Be6 (8...g4 9.cd6 ed6 10.Bd3=) 9.cd6 cd6 10.Bg5 Rc8 11.Qd4 Rc5 12.Bf6 gf6 13.Bd3 Rg8 14.0–0–0 (14.Na4 Rcg5 15.Qa7 Rg2 16.Qb7 Rg1 17.Ke2 Bg4 18.Kd2 Bh6 19.Kc3 Rg2+=) 14...Qc8 (14...Bh6 15.Kb2+=) 15.Nd5 (15.Na4!? Rh5 16.Nb6+=) 15...Bd5 16.ed5 Bh6 17.f4 Rg2 The pressure on the backward pawn c2 grows 18.Qe4 Qg4 19.Rhf1 (19.Rdf1 f5 20.Qd4 Bg7+=) 19...f5–/+ (19...Rh2?! 20.Rde1 Bf8 21.Rg1=) 20.Qa4 (better is 20.Qd4!? Bg7 21.Qe3–/+) 20...Qg7–+ Threatening mate... how? (20...Rd5?! 21.Qa5 Kd7 22.Qa7=) 21.Kb1 Qf6 22.b6 Kd8 23.Bf5 Qf5 24.Rc1 Qd5 25.Rf3 0–1. b4_player – opponent, internet, 2008.

4.Nc3 e5 5.Nf3 Be7 (5...Nbd7 6.d4=) 6.Be2 (6.d4 Nbd7=) 6...0–0 (6...Nbd7 7.d4=) 7.0–0 c5 (7...Nbd7 8.d4=) 8.d3 Nbd7 9.a4 Nb6 10.Nd2 (10.Be3 d5 11.ed5 Nbd5=) 10...Be6 11.f4 ef4 Black gets the initiative 12.Nf3 d5 13.Bf4 Rc8 (13...d4 14.Nb1=) 14.ed5 (14.e5 Ng4=) 14...Nfd5+= 15.Nd5 Nd5 16.Bd2 Bf6 17.Rb1 (better is 17.Ra3!?+=) 17...Nc3–+ 18.Bc3 Bc3 19.b6 Re8 (19...Rc6 20.Rb5–+) 20.Kh1 Rc6 21.Nd2 Rb6–+ 22.Rb6 Qb6 23.Ne4 Bd4 24.c3 Be5 25.Bh5 h6 26.Re1 Qc7 27.g3 b6 28.Bf3 f5 29.Nf2 Bf7 30.Kg2 Qd8 31.Qc2–/+ Bf6 32.Re8 Qe8 33.g4 Qe1–+ 34.d4 cd4 35.cd4 Bd4 36.gf5 Qe3 37.Qe2 Q4g5 (37...Qg5 38.Kh1 Qf5–+) 0–1. Beekes,Noud – Krabbenbos,Jan, SL–2006–0–00041, 2006.

4.d3 e5 5.c4 c6 6.Nc3 d5 7.ed5 cd5 8.a3 dc4 9.dc4 Qd1 10.Nd1 Nbd7 11.Bb2 Bc5 12.Nf3 0–0 13.Be2 Re8 14.0–0 b6 15.Ne3 Bb7 16.Rad1 Rac8 17.Rd2 Rc7 18.Rfd1 g6 19.Ne1 Re7 20.Nd5 Nd5 21.cd5 Bd6 22.Nc2 Re8 23.Ne3 Rec8 24.Bg4 f5 25.Bf5 gf5 26.Nf5 Bf8 27.d6 Rc5 28.Ne7 Be7 29.de7 Nf6 30.Rd6 Ne8 31.Rb6+/– R8c7 32.h3 a4 33.Re1 Re7 34.Bd4 Rd5 35.Be5 Nd6! 36.Bc3 Rd7 37.Bb4 Kf7 38.Bd6+= R5d6 39.Rd6 Rd6 40.Rc1 Rb6 ½–½. Hoch,Hubertus (2165) – Sabrowski,Uwe (1800), BdF–DFSMM, 2005.

3.Nf3 e5

4.Bb2 (--> 1.b4 a5 2.b5 e5 3.Bb2 d6 4.Nf3).

4.d4 ed4 5.Bb2 Be6 =.

4.e4 Nf6 5.d4 =.

4.e4 g6 5.Bc4 Bg7 6.0–0 Nd7 7.a4 Nc5 8.d3 Nf6 9.Be3 Ne6 10.Nbd2 0–0 11.c3 c6 12.Rb1 d5+= 13.Ba2 d4 14.cd4 ed4= 15.Bg5 Ng5 16.Ng5 h6 17.Ngf3 Nh5 18.bc6+= bc6 19.g3 Bg4 20.Qc2 Qd7 21.Rb6 Bh3 22.Rfb1+= Ra7 23.Kh1 Rc8 24.Ng1 Be6 25.Be6+= Qe6 26.Ngf3 Qd7 27.Qc5+/– (27...Nf6 A) 28.Nd4 Ne4 29.de4 Bd4–/+ (29...Qd4?! 30.Qd4 Bd4 31.Rb8 Rb8 32.Rb8 Kg7 33.f4=+); B) 28.Ne5+/–) 1–0. Bonetti,Shane (2110) – Blankenberg,Bruno (2445), TT–15 ETC, 2005.

2.b5 g6

3.Bb2 f6 4.e3 Bg7 5.Nf3 Nh6 6.Be2 d6 7.0–0 Be6 8.c4 Nd7 9.d4 0–0 10.Nc3 c6 11.a4 Nb6 12.Qb3 Rc8 13.bc6 Rc6?? Pawn c4, live or die! (better is 13...bc6 14.d5 Bf7+=) 14.d5+– Bd5 15.cd5 Rc3 (15...Rc8+–) 16.Bc3 Nd7 17.Bd4 Ne5 18.Be5 fe5 19.Rab1 Qd7 20.Qb5 Qg4 21.h3 Qh5 22.Nd4 Qg5 (22...Qh4 23.Ne6 Rb8 24.Qa5+–) 23.Ne6 Qf6 24.Nf8 Bf8 25.Qb7 Nf5 26.Qd7 Qg5 27.e4 (27.e4 Nd4 28.Rb2+–) 1–0. mihai740609 – ulise, kurnik, 2011.

3.e4 d6 4.d4 Bg7 5.Nf3 c5 6.bc6 bc6 7.Bd3 Ba6 8.0–0 Nf6 9.c4 0–0 10.Nc3 c5 11.d5 (11.e5 de5 12.de5 Ng4+=) 11...Nbd7 (better is 11...Ne4!? 12.Be4 Bc3=+) 12.Rb1+= Rb8 13.Rb8 Qb8 14.Qe2 Qb4 15.Bd2 Qb7 16.Rb1 Qc7 17.Nb5 Bb5 18.cb5 Nb6 (18...a4 19.Qd1+=) 19.Ba5+/– Ra8 20.Bb6 Qb6 21.Bc4 Nd7 22.Qd3 Ne5 (22...Ra4 23.Bb3 Rb4 24.a4+=) 23.Ne5+/– Be5 24.Qf3 Ra4 25.Rc1 Qa5 26.Qd3 Ra3 27.Qe2 Qb4 28.g3 Ra7 29.Qe1 Bd4 30.Qb4 cb4 31.Kg2 Bc5 32.Rb1 Ra3 33.Rb2 Kf8 34.g4 Ke8 35.g5 Kd8 36.h3 Kd7 37.f3 Ra8 38.Kg3 Ra3 39.Kg4 Rc3 40.Be2 Ra3 (40...Kc7 41.h4+/–) 41.h4 e6 42.h5 ed5 43.ed5 Re3 44.hg6 hg6 45.Bc4 Rc3 46.Bf1 Re3 (46...Kc7 47.f4+/–) 47.b6 Kc8 48.Ba6 Kb8 49.f4 Re4 50.b7 Ka7? (better is 50...Re3!?+/–) 51.a3!+– Rd4 (51...ba3 52.b8Q) 52.ab4 (better is 52.Re2 Bb6 53.Re8+–) 52...Rb4 53.Rb4 Bb4 54.f5 (54.Bb5 Bc3+–) 54...gf5 55.Kf5 Bc3 56.Kf4 Be5 57.Ke3 Kb8 58.Ke4 Ka7 59.Kf3 Kb8 60.Kg4 Kc7 61.Kf5 Kb8 62.Be2 Kb7 63.Bh5 Kb6?? (better is 63...Kc7+–) 64.Bf7 Kc5 65.Ke6 Bg7 66.g6 Be5 67.Ke7 Bg7 68.Be6 Be5 69.Kf7 Kd4 70.g7 Bg7 71.Kg7 Kc4 72.Kf6 Kb5 (73.Ke7 Kb6 74.Kd6 Kb5 75.Ke7 Ka4 76.d6 Ka5 77.d7 Kb6 78.d8Q Kc5 79.Qd5 Kb4 80.Qc4 Ka5 81.Bf5 Kb6 82.Qb4 Ka7 83.Bc8 Ka8 84.Qb7) +–. market (2175) – bh33 (2020), GameColony.com, 2002.

3.Bb2 Nf6

(--> 1.b4 a5 2.b5 Nf6 3.Bb2 g6).

4.e3 Bg7 5.d4 0–0 6.Nf3 d5 7.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.d4 a5 7.b5).

4.e3 Bg7 5.Nf3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 0–0 5.Nf3 a5).

4.e3 Bg7 5.Nf3 c5 6.c4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 a5 6.b5 c5).

4.e3 Bg7 5.Nf3 0–0 6.c4 d6 7.d4 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6 5.d4 Bg7 6.Nf3 0–0 7.c4).

4.Nf3 Bg7 5.c4 0–0 6.e3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 a5 6.b5).

4.Nf3 Bg7 5.e3 0–0 6.c4 d6 7.d4 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6 5.d4 Bg7 6.Nf3 0–0 7.c4).

4.Nf3 Bg7 5.g3 (--> 1.b4 Nf6 2.Nf3 g6 3.g3 a5 4.b5 Bg7 5.Bb2).

3.e4 Bg7

4.d4 c5 5.c3 b6 6.Bc4 cd4 7.cd4 Bb7 8.Nc3 d6 (8...f5 9.f3+=) 9.Nf3 Nf6 10.Bd3 Nbd7 11.Be3 Ng4 12.Bd2 0–0 13.Rc1 e5 14.h3 ed4 15.hg4 dc3 16.Bc3 Ne5 17.Ne5= de5 18.Qf3 Rc8 19.Rc2 g5 20.Qf5 h6 21.Be2 Rc5 22.Rh3 Qc7 23.Qf3 Rc8 24.Qe3 a4 25.a3 Qd6?? 26.Bb4–/+ Bf8 27.Bc5 Rc5 28.Bd3 Qc7 29.Qd2 Qd7 30.Rc5 Bc5 31.Rh6 Qg4 32.Be2 Qg2 33.Qd8 Bf8 34.Rh8!! Kh8 35.Qf8 Kh7 36.Qf7 Kh6 37.Qb7 Qg1 38.Bf1 g4 39.Qb6 Kg5 40.f4! 1–0. b4_player (2145) – bh33 (1990), GameColony.com, 2002.

4.d4 d5 5.e5+=.

4.Nc3 d6

5.b6 Bc3 6.bc7 Qc7 7.dc3 =+.

5.b6 c6 6.Rb1 Nf6 =+.

5.b6 c6 6.Nf3 Qb6 7.Rb1 Qc7 8.Bb2 Nf6 9.Bc4 (9.a4 0–0=+) 9...e6 10.0–0 0–0 11.Re1 b5–/+ 12.Bf1 Nbd7 13.Re3 Ng4 14.Re1 Nde5 15.Ne5 Ne5 16.f4 Nd7 17.Qf3 a4 18.Nd1 e5 19.c4 b4 20.a3 c5 21.Ne3 Bb7 22.Nd5 Bd5 23.cd5 Nb6 24.ab4 cb4 25.Rec1 Qe7 26.fe5 Be5 27.d4 Bg7 28.Rc6 Nd5?? 29.ed5= Rfb8 30.Rbc1 b3 31.Rc7 Qf8 32.Ra1 a3 33.Ra3 Ra3 34.Ba3 Bd4 35.Kh1 b2 36.Bb2 Rb2 37.Qd3 Be5 38.g3 Qd8 39.Rc2 Rb4 40.Kg2 Kg7 41.Be2 Qd7 42.Ra2 Rd4 43.Qb3 Qf5 44.Qf3 Qg5 45.Bb5 h5 46.Re2 Rb4 47.Qd3 (47.Be8!? f5 48.Ra2–/+) ½–½. Ziolkowski – Wolfram, corr 3GMM–47, 1996.

5.b6 c6 6.Nf3 Nf6 7.d4 Nbd7 8.Bd3 Qb6 9.Rb1 Qc7 10.a4 0–0 11.0–0 e5 12.de5 Ne5 13.Ne5 de5 14.Qf3 Be6 15.Bg5 Nd7 16.Rfd1 Nc5 17.Bf6 Bg4 18.Qg4 Bf6 19.Qf3 Bg7 20.Bc4 Kh8 21.Qe3 b6 22.Qf3 Rad8 23.Rd8 Qd8 24.Rd1 Qc7 25.Qg3 f5 26.Qh4 f4 27.Be2 Bf6 28.Qg4 Rd8 29.Bc4 Rd4 30.Qe2 Qd6 31.Rb1 Rd2 32.Qe1 Bh4 33.g3 fg3 34.hg3 Bd8 35.Bd3–/+ Rd3 36.cd3= Ne6 37.Qe3 Nd4 38.Kg2 Qf6 39.Ne2 Ne6 40.Rb6 Bb6 41.Qb6 c5 42.Qa5+– g5 43.Qa8 Kg7 44.a5 g4 45.Qb7 Kg6 46.a6 Qf3? 47.Kf1 Nd4 48.Nd4 cd4 49.a7 Qd1 50.Kg2 Qf3 51.Kg1 Qd1 52.Kh2 Qf1 53.Qb6 1–0. orane (2165) – DimaDzhan (2260), Live Game Caissa's Web, 2004.

5.d4 Nf6 =.

4.d4 d6

5.Nf3 c5 6.bc6 Nc6 7.c3 Nf6 8.d5 Ne5 9.Ne5 de5 10.Bd3 0–0 11.0–0 e6 12.Ba3 Re8 13.d6 Bd7 14.Qf3 Bc6 15.Rd1 Qd7 16.c4–/+ b6 17.Nc3 Red8 18.Rab1 Rab8 19.c5 bc5 20.Rb8 Rb8 21.Bc5 Ne8 22.Bc4 Bf8 23.Qg3 f6 24.Qh3–/+ Ng7 25.Qh4 g5 26.Qh6 Kf7? 27.Qh7+– Rb2 28.Be2 Rc2 29.Bh5 1–0. b4_player (2190) – bh33 (1885), GameColony.com, 2002.

5.Nf3 Nf6 6.Bd3 0–0 7.0–0 c5 8.c3 b6 9.e5 Ne8 10.Be4 d5 (Better is 10...Ra7!?+=) 11.dc5+/– bc5? (Better is 11...e6 12.c6 Qc7+–) 12.Bd5+– (12...Nc7 13.Ba8 Na8 14.Qd8 Rd8 15.Bg5+–; 12.Qd5?! Qd5 13.Bd5 Ra7+–) 1–0. b4_player (2245) – bh33 (2040), GameColony.com, 2003.

5.Nf3 Nf6 6.Bd3 0–0 7.0–0 Nbd7 8.Re1 e5 9.c3 c6 10.Nbd2 Qb6 11.Nc4 Qc7 12.Rb1 d5 13.b6 Qb8 (13...Qd8!? 14.ed5 Nd5=) 14.ed5–/+ cd5 15.Nce5+– Ne5 16.Ne5 Be6 17.Bf4 Qd8 18.a3 Nh5 19.Be3 Rb8 20.Qa4 Ra8 21.Rb3 Be5 22.de5 Ng7 23.Bc5 Re8 24.Bb5 Re7 25.Rb2 Nf5 26.Rd2 Rc8 27.Be7 Qe7 28.Qa5 Qc5 29.Rd3 d4 30.c4 Kg7? 31.Qa7 Qe7 32.g4 Nh6 33.Rd4 Ng4 34.Ree4 Qg5 35.f4 Qh4= 36.Re2 Nh6?? 37.Qb7+– Rf8 38.c5 Nf5 39.Rb4 Qg4?? 40.Qg2 Qg2 41.Kg2 Nh4 42.Kf2 Nf5 43.c6 Bd5 44.a4 Rc8 45.Ba6 Rc6 46.b7 Rc4 47.Bc4 Bb7 48.Rb7 Nd4 49.Rf7 Kh6 +–. market (2150) – bh33 (1970), GameColony.com, 2002.

5.Nf3 Nf6 6.Bd3 Nbd7 7.0–0 0–0 8.c3 c5 (8...Re8 9.Qc2+=) 9.bc6 (9.Qe2 a4+=) 9...bc6 10.Be3 (10.Qe2 c5+=) 10...e5 (10...Rb8 11.Nbd2+=) 11.Qa4 (11.Nbd2 Re8+=) 11...Qc7 12.Nbd2 Ng4 13.Bg5 h6 14.Bh4 g5 15.Bg3 c5 16.h3–/+ Ngf6 17.Rab1 Nh5 18.Bh2 Nf4 19.Bf4–/+ gf4 20.Rfd1 Ba6 21.Ba6 Ra6 22.de5 Ne5 23.Nh4 Rb8 24.Nf5 Kh7 25.Rb8+– Qb8 26.Nc4 Nc4 27.Qc4 Qb7? 28.Nd6 Qa7 29.e5! Rc6 30.Qe4 1–0. market (2235) – bh33 (2020), GameColony.com, 2002.

2.c3 ab4=+

3.cb4 Ra6 4.e3 e5 (better is 4...Ra8=) 5.Ba6+/– Na6 6.a3 Nf6 7.Bb2 d5 (7...d6!?+/–) 8.Be5+– Be7 (8...Bg4 9.Nf3+–) 9.Nf3 0–0 10.0–0 c6 (10...Bg4 11.d3+–) 11.Nc3 b5 (11...Re8 12.Qc2+–) 12.Qc2 Re8 13.d4 Nd7 (13...Bg4 14.Ng5 h6 15.Bf6 Bf6 16.Qh7 Kf8 17.Nf3+–) 14.Ne2 Ne5 (14...Bb7 15.Rfc1+–) 15.Ne5 Bf6 (15...Bd6 16.Qc6 (< 16.Nc6 Qc7 17.a4 ba4+–) 16...Nc7 17.Rfc1+–) 16.Qc6 Bd7 (16...Nb8 17.Qc3 Be5 18.de5 Qg5+–) 17.Nd7 Re6 18.Qd5 Nc7 19.Nf6 (19...Qf6 20.Qd7+–) 1–0. guest – mel28, internet, 2007.

3.cb4 b5

4.e3 c6 5.Bb2 Bb7 6.Nf3 f6 7.Be2 Qc7 8.a3 Na6 9.Bd4 (9.0–0!?+=) 9...e5 10.Bc3 Bd6 11.e4 Be7 (11...c5!?=) 12.d4 d6 13.d5 (13.Qb3 Nh6+/–) 13...cd5 (better is 13...Qd7!? 14.a4 Nc7 15.dc6 Qc6 16.ab5 Qe4 17.Ra8 Ba8=) 14.Bb5+/– Kf8 15.ed5 Qb6 (15...f5 16.Bb2+/–) 16.Bc4 (16.a4 Bd8 17.Qd3 Nc7+–) 16...Nh6 (16...f5!?+/–) 17.0–0+– Rc8 18.Bb3 (18.Qd3 f5 19.Nd4 Bf6 20.Ne6 Kg8+–) 18...Nf5 19.Re1 Nc7 (19...g6 20.Qd2+–) 20.Qd3 g6 21.Nbd2 Ba6 22.Bc4 Bb7? 23.a4 Bd8? 24.a5 Qa7 25.b5 Ne8 26.a6 Ba8 27.Bb4 Bb6 28.Ne4 Neg7 29.Ra2 Ke7? 30.g4 Bc5 31.Bc5 dc5 32.b6! Qb6 33.gf5 gf5 34.d6 Kd7 35.Nf6 Kd8 36.Ne5 Rf8 37.Nh7 Be4 38.Re4! fe4 39.Qd5 Re8 40.Nf7 Kd7 41.Nf6 1–0. annmarie – Flip4, Live Game Caissa's Web, 2004.

4.e3 Nc6 5.Qb3 e6 6.Ba3 d5 7.Bb5+/– Bd7 8.Nf3 (better is 8.Bc6 Bc6 9.b5 Ba3 10.Na3+/– Qd6 11.Nc2 Bd7) 8...Bb4?? (better is 8...Rb8 9.Nc3 Bd6+= (9...Nf6 10.Rb1 Bd6 11.Bc6 Bc6) 10.Bc6 Bc6 11.b5 Nf6; 8...Qb8 9.Nc3 Bd6 10.0–0 Nf6 11.Rab1 0–0) 9.Bc6+– Bd2 (9...Bc6 10.Qb4 Nf6 11.Qc3+–) 10.Nbd2 Bc6 11.Qc3 Nf6 (11...Ra3 12.Qa3 Ne7+–) 12.Qc6 Nd7 13.Bb4 Qb8 (13...Rb8 14.Ba5 Rc8+–) 14.Ne5 Qd8 15.Nd7 Rc8 16.Nf6# 1–0. Marram – Omer Faruk Cerrah, internet, 2010.

3.cb4 Nc6

4.b5 Nd4 5.e3 Ne6 (5...Nf5 6.e4 Nd4 7.Nf3=+) 6.Nf3 b6 (6...d5 7.d4=) 7.d4 d5 (7...Nf6 8.Nc3+=) 8.Bd3 Bb7 9.0–0 Nf6 10.a4 (10.Nc3 Qd6+/–) 10...c6 (10...g6!?+/–) 11.bc6+– Bc6 12.Ne5 Qc8? (better is 12...Bd7+–) 13.Nc6 Qc6 14.Bb5 (14...Qb5 15.ab5 Ra1 16.Ba3+–) 1–0. orane – sailoro7, Caissa's Web, 2005.

4.b5 Ne5 5.e3 d5 6.d4 Ng6 7.Bb2 e6 8.a3 Nf6 9.Nc3 Bd6 10.Nf3 0–0 11.Bd3 Bd7 12.0–0 c6 13.bc6 bc6 14.e4 de4 15.Ne4 Ne4 16.Be4 Ra5 17.Qc2 The isolani on c6 becomes a target 17...Qe7 18.Qc3 Rh5 19.d5 (19.Rfe1 Qf6+=) 19...Ne5 (19...f5!? 20.Bc2 cd5–/+) 20.dc6 (20.Ne5? Be5 21.Bh7 Kh8 22.Qe5 Re5 23.Be5 ed5–+) 20...Nf3 21.Qf3 Bh2 22.Kh1 Qg5 23.g4?? Be5–+ 24.Kg2 Bb2 25.Rab1? Rh4 26.Rb2 Rg4 27.Qg3 Bc8 28.c7 f5 29.Rb5 Rg3 30.fg3 Ba6 31.Rb8 Bf1 32.Kf1 Qc1 (32...Qc1 33.Kg2 fe4 34.Rf8 Kf8–+; 32...fe4?! 33.Rf8 Kf8 34.c8Q Kf7 35.Qc7 Kg6 36.Qd6–+) 0–1. Nekrasova,Tatyana – Shukan,Mikhail, Novokuznetsk RUS, Open, 2011.

3.cb4 d5

4.Bb2 b5 5.a4 (5.Nf3=) 5...e5 (5...ba4!? 6.Ra4 Ra4 7.Qa4 Bd7=) 6.Be5+= Nc6 7.ab5 Ne5? (better is 7...Ra1 8.Ba1 Nb4+/–) 8.Ra8+– Nf6 (8...Nc4+–) 9.b6! Bd6 10.b7! Bb7 11.Rd8 Kd8 12.Qb3 Ke7 13.e3 Ra8 14.d4 Nc4 15.Nf3 Ra1 16.Bd3 Bc6 17.b5 Bb7 18.0–0 Nb6 19.Nc3 Ra3 20.Qc2 h6 21.Rc1 g5 22.Ne5 h5 23.Nb1 Ra1 24.Bh7 Nc4 25.Nc4 dc4 26.Bf5 Nd5 27.e4 Nb4 28.Qc4 Na2 29.Re1 Kd8 30.Qf7 Bc8 31.Qf6 (31...Ke8 32.Bg6 Kd7 33.Qf7 Be7 34.Bf5 Kd8 35.Qg8 Bf8 36.Qf8#) 1–0. orane – 12yearoldgirl, caissa.com, 2006.

4.Bb2 e5 5.Be5 Nc6 6.Bc3 Nb4 7.a3 =+.

4.Bb2 Nf6 5.Qb3 e6 6.e3 Be7 7.Ne2 0–0 8.Ng3 b6 9.a4 c5 10.b5 c4 11.Qc3 Nbd7 12.Be2 Nc5 13.Ba3 Na4 14.Qc1 Nc5 15.Qc3 Bb7 16.f3 Qd7 17.Ra2 Qb5 18.Rb2 Qc6 19.Bd1 Rfb8 20.0–0 b5 21.Bb4 Bf8 22.Bc2 Na4 23.Qe5 Nb2 24.Qb2 Bb4 25.Qb4 Nd7 26.Nc3 Qc5 27.Qb2 b4 28.Na2 b3 29.Bb3 cb3 30.Nc3 Ba6 31.Re1 Bd3 32.Nh5 f6 33.Rc1 Qa3 34.Qa3 Ra3 35.Nf4 b2 36.Re1 b1Q 37.Nb1 Rb1 38.Rb1 Bb1 39.Kf2 e5 40.Ne2 Ra2 41.Ke1 Nc5 42.Nc3 Rb2 43.Nd5 Nb3 44.Nc3 Nd2 45.Na4 Rb4 46.Nc3 Nc4 47.Kf2 Rb2 48.Kg3 Ne3 49.f4 Rg2 50.Kf3 e4 51.Ke3 Rh2 52.Nb1 f5 53.Nc3 Rh3 54.Kd4 Rc3 55.Kc3 h5 56.Kd4 Kf7 57.Ke5 e3 58.Kd4 e2 59.Kd3 e1Q 60.Kd4 Qe4 61.Kc5 Qf4 62.Kc6 ½–½. world1star (1730) – gargantuel21 (1850), kurnik, 2012.

4.Nf3 Bf5 5.Bb2 h6 (5...e6 6.a3=+) 6.e3 e6 7.a3 Nd7 8.Be2 Ngf6 9.d3 Bd6 10.Nd4 Bh7 11.0–0 Qe7 12.Nb5 c6 13.Nd6 Qd6 14.f4 0–0 15.Nd2 c5 16.bc5 Nc5 17.Nb3 Ncd7 18.a4 Qb8 19.a5 Qd6? (better is 19...Rc8+=) 20.Ba3+– Qc7 21.Bf8 Kf8 22.Qd2 Qd8 23.Qb4 Qe7 24.Qe7 (24...Ke7 25.Rfc1+–; 24.Qb7?! Rb8 25.Qc6 Rb3+=) 1–0. orane – hamegg, caissa.com, 2007.

4.Nf3 Nf6 =+.

3.cb4 e5

4.Bb2 Nc6 5.b5 Nb4 (5...Na7 6.e3 d6 7.d4=) 6.Nc3 (6.Be5? Qe7 (6...Ra2?! 7.Ra2 Na2 8.Qc2=; 6...Na2?! 7.e3 d6 8.Bd4=) 7.d4 d6–+) 6...Qf6? (better is 6...d5 7.a3 d4 8.ab4 Ra1 9.Ba1 dc3 10.dc3 Qd1 11.Kd1 Nf6+=) 7.a3+– Bc5 (7...d5 8.ab4 Ra1 9.Qa1+–) 8.Nf3 Qb6 9.e3 e4 (9...d6+–) 10.Ne4 Nd5 (10...Qg6 11.ab4 (11.Nc5?! Nc2 12.Ke2 Na1+–) 11...Ra1 12.Qa1+–) 11.Nc5 Qc5 (11...Ngf6 12.Bd4 Qd6+–) 12.Bg7 Ngf6 13.Bh8 Ra3 14.Ra3 Qa3 15.Bc4 Qf8 (15...d6 16.Ng5+–) 16.Qa1 Nb4 (16...Qe7+–) 17.Qe5 Kd8 18.Bf6 (18...Qe7 19.Qe7#) 1–0. pierred (2420) – mdf (1805), net–chess.com, 2006.

4.Bb2 d5 =+.

4.Bb2 d6 5.e4 c6 (5...Nf6 6.Qc2=+) 6.d4 d5 7.Bc3 (7.a3 de4 8.Qc2 Bf5 9.de5 Ne7=+) 7...Nf6 8.f3 (8.ed5 ed4 9.Qd4 Nd5=+ (< 9...cd5 10.Nf3=)) 8...ed4 9.Qd4 Nbd7 (9...de4 10.Qd8 Kd8 11.b5–/+) 10.a4 (10.e5 c5 11.Qd1 A) < 11...cb4 12.ef6 bc3 13.Qe2 Be7 14.fe7+/– (14.Qe7?! Qe7 15.fe7 d4=); B) 11...Qe7=+) 10...de4 11.fe4 Qe7 12.Na3?? (better is 12.Bd3!?–/+) 12...Nd5 (12...Ne4 13.Ne2 Ra4 14.Nc2 Nc3 15.Qc3 Ra1 16.Qa1–+) 13.b5 Nc3 14.Qc3 Qe4 15.Ne2 Bb4 16.Nb1 Bc3 17.Nbc3 Qe6 18.g3 0–0 19.Rb1 Ra4! 20.Na4 Qe4 21.Bg2 Qb1 22.Kf2 Qb5 (23.Nac3 Qc5 24.Ke1 Rd8–+) 0–1. IrishBouncer – Bazza3, ChessWorld.net, 2005.

4.Bb2 e4 5.a3 (5.Nc3 d5 (5...Nf6 6.a3 d5 7.d3 c5 8.bc5 Bc5 9.e3 0–0+=) 6.a3 Nf6 7.d3 c5 8.bc5 Bc5 9.e3 0–0+=; 5.Qc2 d5 6.b5 Nf6 7.e3 Bb4 8.a3 Bd6 9.Nc3 0–0+=) 5...Nf6 (5...d5 6.d3+= (6.Nc3 Nf6 7.d3 c5 8.de4 d4 9.Nb5 Ne4+=; 6.e3 Nf6 7.d3 Bd6 8.de4 de4 9.Nd2 0–0+=) 6...Nd7 7.Nd2 Ngf6 8.de4 de4 9.e3 Bd6=) 6.d3= Nc6 (6...e3 7.fe3 d5 8.Nf3 Be6 9.g3 c5=) 7.de4 Ne4 8.Nd2 (8.Nf3 d6 9.e3 Ng5=) 8...d5 9.Ngf3 (9.e3 Qh4=) 9...Bf5 (9...f6=) 10.Rc1 Nf6 11.e3 Be7 (11...Bd6 12.Bb5 Bd7 13.Bd3+=) 12.Bb5+= Bd7 13.Bd3 0–0 14.0–0 Bg4 15.Qc2 Bd6 16.Rfe1 Re8 17.h3 Bh5 18.b5 Bf3? (better is 18...Na7!?+=) 19.bc6+/– (19.gf3 Ne5 20.f4 Nd3 21.Qd3 Be7+=; 19.Nf3?! Na7+/–) 19...Be4 (19...Bh5!? 20.e4 d4 21.cb7 Rb8+–) 20.cb7+– Rb8 21.Bf6 Qf6 22.Ne4 de4 23.Be4 Qe5 24.Bc6 Qh2 25.Kf1 Re6? 26.Qa4 Qe5 27.Qa8! Ree8 28.Be8 Qe8 29.Qa6 Qe7 30.Red1 Ba3 31.Ra1 Bd6 32.Qa8! c5 33.Rd6! Qd6 Decoy to d6 34.Qb8!! (34.Qb8 Qb8 35.Ra8+–) 1–0. pierred (2595) – kode (2345), net–chess.com, 2008.

4.Bb2 Qe7 5.a3 d5 (5...Nf6 6.Qc2=) 6.e3 (6.Nf3 Nd7=) 6...Nf6=+ 7.Nf3 e4 (7...Nbd7 8.Nc3=+) 8.Nd4= Na6 (8...Nbd7 9.d3=) 9.Nc3 c5 (9...Bd7 10.d3=) 10.bc5 Nc5 11.Rc1 (11.d3 Bg4 12.Qc2 Qc7=) 11...Qc7 (11...Qd8 12.Bb5 Bd7 13.0–0=) 12.Na4 (12.Nb3 Bd7=) 12...b6 (12...Ra4 13.Rc5 Bc5 14.Qa4 Bd7 15.Nb5=) 13.Nb5+= Qb7 (13...Qc6 14.Bf6 gf6 15.Nac3+=) 14.Nc5 bc5 (14...Bc5?? 15.Rc5 0–0 16.Rc7+–) 15.Be5 Kd8 16.Rb1 Qc6 (16...Qe7 17.Bc7 Kd7 18.d3+=) 17.d3+/– Bd7 (17...Bf5 18.Bf6 gf6 19.de4 Be4 20.Rc1+=) 18.Bf6 (18.de4 Ne4 19.f3 Nf6+/–) 18...Qf6+/– 19.de4 de4 20.Bc4 Be7 (20...Rc8 21.0–0+/–) 21.0–0 Kc8 (21...Qe5!?+/–) 22.Qb3 Rb8 (22...Qe5+–) 23.Qa4 Kd8 (23...Qb6 24.Rfd1 Rd8 25.Na7 Kc7 A) 26.Rb6 Ba4 27.Rd8 Rd8–/+ (< 27...Bd8 28.Rb8 Kb8 29.Nb5=+); B) 26.Rd7 Rd7 27.Rb6 Rb6 28.Nb5 Kc8 29.h3+–) 24.Rbd1 Qb6 25.Rd7! Kd7 26.Nc3 Qc6 27.Rd1 Bd6 28.Bb5 Rb5 29.Nb5 (29.Qb5?! Qb5 30.Nb5 Kc6 31.Na7 Kd7=) 29...Ke7 30.Rd6 Ra8 (30...Qb7 31.Ra6 Qd5 32.Nc3+–) 31.Qc4 Qd6 32.Nd6 Kd6 33.Qf7 Ra3 34.Qg7 Rd3 (34...Ra8 35.Qf6 Kd7 36.h4+–) 35.g4 (35...c4 36.Qh7+–) 1–0. pierred – PeterRs, ChessWorld.net, 2006.

4.Bb2 f6 5.a3 d5 6.d4 e4 7.Nc3 f5 8.Nh3 Nf6 9.e3 Bd6 10.Be2 0–0 11.Nb5 Be7 12.0–0 c6 13.Nc3 Kh8 14.Qc2 Be6 15.Nf4 Bf7 16.b5 g5 17.Nh3 Ng4 18.Qd1 h5 19.Qb3 Nd7 (19...c5 20.Qc2 Qc7 21.g3 cd4 22.ed4=) 20.bc6 bc6 21.Rfb1 Bd6 22.Qb7 (22.g3 f4=) 22...Bh2= 23.Kf1 Rc8 24.g3 f4 (better is 24...Be6!?=+) 25.ef4+= gf4 26.Nf4 Be8? (better is 26...Ndf6 27.Kg2 h4+=) 27.Bg4+– Rf4 28.Bd7 Bd7? 29.gf4+– Bf4 30.Bc1 Bh3 31.Ke2 Bg4 32.Ke1 Rc7?? 33.Qb8 Qb8 34.Rb8 Kh7 35.Bf4 Rf7 36.Be5 h4 37.Rh8 Kg6 38.Rh4 Kf5 39.Rh6 Bf3 40.Rc6 Rh7 (41.Kd2 Rh1 42.Rh1 Bh1 43.Nd5 e3 44.Ne3 Kg5+–). b4_player (2190) – ponciany (2150), GameColony.com, 2003.

4.Qb3 Nf6 5.Nf3 e4 6.Ne5 d5 7.e3 Bd6 8.Bb2 (8.d4 0–0–/+) 8...Be6 (8...Qe7 9.f4–/+) 9.Be2 d4 10.Bc4 Be5 11.Be6 0–0 (11...fe6 12.Qe6 Qe7 13.Qc8 Kf7 14.Qh8 de3 15.Be5 Qe5 16.Nc3 ed2 17.Kd2–/+) 12.Bf5 Nc6 13.b5 Na5 14.Qb4 Nd5 (14...Qd5!? 15.Bh3 Nc4 16.Bd4 Bd4 17.ed4 Qd4–+) 15.Qc5 b6 16.Qc1 Qf6 17.Be4 (17.ed4 Qf5 18.de5 Nf4–+) 17...de3 18.Nc3 Qf2 19.Kd1 Nc4 20.Bd5 (20.Bh7 Kh7 21.Qc2 Kh6–+) 20...ed2 21.Bc4 dc1Q 22.Kc1 Ra3! 23.Bb3 (23.Ba3 Qe3) 23...Rb3! 24.ab3 Qf4 25.Kb1 Qf5 26.Ka2 Ra8 27.Na4 Ra4! 28.ba4 Qc2 (29.Rhb1 Qc4 30.Ka3 Bd6#) 0–1. ramesis – pcmvr (1700), net–chess.com, 2006.

4.b5 (--> 1.b4 e5 2.b5 a6 3.c4 ab5 4.cb5).

4.Nc3 Bb4 5.e4 Nf6 6.f3 (better is 6.Nd5 Nc6 7.Nf3–+) 6...0–0 7.a3 d5 8.ed5 Nd5 9.Bb2 Nc3 10.dc3 Qd1 (10...Bd6 11.Bd3–+) 11.Kd1 (11.Rd1 Be7–+) 11...Rd8 12.Kc2 (12.Ke1 Be7–+) 12...Bf5 13.Kb3 Bc5 14.a4 (14.g4 Bg6 15.Be2–+) 14...Nc6 15.Ba3 (15.Bc1 Rd1 16.Be2 Rg1 17.Rg1 Bg1 18.Bg5 Bh2 19.Kb2–+) 15...Na5 16.Ka2 Rd2 17.Bb2 Nc4!! 18.Bc4 (18.Bc4 Ra4 Mate attack) 18...Ra4 19.Kb3 Bc2 0–1. pushtiu (2245) – pcmvr, net–chess.com, 2015.

4.e4 Bb4–/+ 5.Nf3 Nc6 6.Bd3 (6.Bb2 d6–/+) 6...Nf6–+ 7.0–0 0–0 8.Bb2 d5 9.Nc3?? (better is 9.Qc2 de4 10.Be4 Ne4 11.Qe4–+) 9...Bc3 10.dc3 de4 (10...Ne4?! 11.c4 f6 12.Qb3–+) 11.Be4 (11.Bb5 Qd1 12.Rfd1 ef3 13.Bc6 bc6–+) 11...Ne4 12.Qd8 (12.Re1 Bf5–+) 12...Rd8 (< 12...Nd8 13.Rfe1 Bf5 14.Ne5–+) 13.h3 (13.Rfe1 Bf5–+) 13...Nd2 14.Nd2 Rd2 15.Rfb1 (15.Bc1 Rda2 16.Ra2 Ra2–+) 15...Bf5 16.Bc1 (16.a3 Bb1 17.Rb1 b5–+) 16...Rd1 17.Kh2 Bb1 18.Rb1 Ra2 19.Rb2 Rb2 20.Bb2 Rd2 21.Ba3 Rf2 22.Bb4 Nb4 23.cb4 e4 (24.Kg3 Rb2–+) 0–1. The Enchanter – PassedPawn, ChessWorld.net, 2005.

4.e4 Qe7 5.a3 Qe6 (5...Qh4 6.Qc2 Nf6=) 6.Nc3 (6.Bb2 Nf6=) 6...h5 (better is 6...Bb4 7.Nd5 Ba5–/+) 7.Nd5 Qc6? (7...Bd6 8.Qc2 Nc6 9.b5+=) 8.b5 (better is 8.Bb2!? Kd8 9.Nf3+/–) 8...Qd6+/– 9.Nf3 (better is 9.Qc2 c6 10.Bb2+/–) 9...c6? (better is 9...Nf6 10.d4 Nd5 11.de5 Qg6 12.ed5 Bb4 13.Bd2 Ra3+= (13...Ba3? 14.Qb3+–)) 10.Nb6+– Qc7 11.Na8 Qa5 12.bc6 Qa8 13.cd7 Bd7 14.Ne5 Bg4 15.Ng4 hg4 16.Bb5 Ke7 17.a4 b6 18.Ba3 Ke6 19.Bf8 Rh7 20.Qb3 Ke5 21.d4 Kd4 22.Rd1 Ke4 23.Bd3 Kf4 24.g3 Kf3 25.Bh7 Kg2+– 26.Kd2 Nf6 27.Rdg1 Kf2 28.Qe3# 1–0. Kevin@home – sirrad, ChessWorld.net, 2005.

4.e4 Nf6 5.Nf3 Bb4 6.Ne5 Nc6 (< 6...Ne4 7.Qg4 d5 8.Qg7=+) 7.Bb2 0–0 (7...Ne5!? 8.Be5 A) 8...Ne4?! 9.Qg4 Qe7 10.Qg7=+ (< 10.Qe4 Ra5 11.f4 f6–/+); B) 8...Qe7–/+) 8.a3 Ba5 9.Nc6 dc6 10.Nc3 Bc3 11.dc3 Ne4 12.Qd8 Rd8 13.f3 Nc5 14.Rd1 Bf5 15.Rd8 Rd8 16.Bc1 Re8 17.Kf2 Bd3 18.Be3 Bf1 19.Bc5 Bb5 20.Re1 Re1 21.Ke1 f6 22.Be7 Kf7 23.Bd8 Ke6 24.Bc7 ½–½. pierre (2115) – jolaw (1605), internet, 2007.

4.Nf3 Bb4 5.Ne5 Nc6 6.Bb2 Ne5 7.Be5 =+.

4.Nf3 d6 5.Nc3+= Nf6 6.e4 Bg4 7.h3 Bh5 8.Be2 Nc6 9.0–0 Nb4 10.Rb1 (10.Qb3!? d5 11.ed5+=) 10...Na2–/+ 11.Na2 Ra2 12.Rb7 Be7 13.Qb3 Ra8 14.Bb5 Kf8 15.Bc6 Bf3 16.Qf3 g6 17.d4 Kg7 18.Bb2 Rb8 (18...ed4!? 19.Bd4 Rb8+/–) 19.de5+– de5 20.Rb8 Qb8 21.Be5 Qb6 22.Rc1 Rd8 23.g4 g5? (better is 23...h6+–) 24.h4! h6 (24...gh4 25.g5 Combination) 25.hg5 hg5 26.Qf5 Rg8 27.Kg2 Qb8 (27...Qa6+–) 28.Ra1 Qb6 (28...Kf8 29.Bf6 Bf6 30.Qf6 Rg6+–) 29.Qg5 Kf8 30.Ra8 Ne8 (30...Qb8 31.Rb8 Bd8 32.Rd8 Ke7 33.Qf6#) 31.Re8# 1–0. usingprogram (1965) – tekil777 (1785), kurnik, 2012.

4.Nf3 e4 5.Nd4 Bb4 6.Qb3 Bf8 7.Nc3 –/+.

4.Nf3 e4 5.Nd4 Bb4 6.Qb3 Bf8 7.Qd5 –/+.

4.Nf3 e4 5.Nd4 Nc6 6.Nc6 dc6 7.Bb2 Bb4? 8.Bg7 Nf6 9.Bh8 +–.

4.Nf3 e4 5.Nd4 Nc6 6.Nc6 dc6 7.Bb2 Nf6 8.a3 Be7 9.e3 0–0 10.d4 ed3 11.Bd3 Qd5 12.0–0 Rd8 13.Bc2 1–0. pcmvr (2815) – ilmarinens (2765), net–chess.com, 2006.

4.Nf3 Qf6 5.Bb2= Nc6 6.b5 Nb4? (better is 6...Nd4!?=) 7.a3+/– (7.Be5?! Qf5 8.d3 d6+=) 7...Nd5 8.e4 Nf4 (8...Nb6 9.Be5 (9.Ne5?! Na4 10.Qc2 Nb2 11.Qb2 Bc5=) 9...Qd8 10.Qc2+/–) 9.Be5+– (< 9.Ne5 d6 10.Nc4 Qe7+/–) 9...Ng2? (better is 9...Qh6+–) 10.Bg2 Qb6 11.Nc3 f6 12.Nd5 Qc5 13.Nc7 Ke7 14.Rc1 Qa3 15.Na8 Qa8 16.Ra1 Qa1 17.Qa1 fe5 18.Qe5 Kd8 19.Ng5 Nh6 20.0–0 Be7 21.Rc1 Bf6 22.Qc7 Ke8 23.Qc8 (23...Ke7 24.Qc5 Ke8 25.Qd5 Bb2 26.Rc7 Bf6 27.Qd7 Kf8 28.Ne6 Kg8 29.Qe8#) 1–0. pcmvr (2815) – mdf (1805), net–chess.com, 2006.

4.a3 Bb4!–/+

5.Bb2 Bd6 6.d4 ed4 7.Bd4 Nf6 8.Nf3 Nc6 9.Bb2 0–0 10.e3 Re8 11.Bd3 Ne5 12.Bc2 b6 13.Nbd2 Bb7 14.0–0 Qe7 15.Ne5 Be5 16.Be5 Qe5 17.Nf3 Qc5 18.Nd4 Ra3 19.Rc1 (Better is 19.Ra3 Qa3 20.Bd3–+) 19...Qd5 20.Nf3 Qd1 21.Bd1 c5 22.Be2 Ne4 23.Bb5 Nc3 24.Rc2 (24.Bd3–+) 24...Nb5 (25.Rb2 Bc6–+) 0–1. pascals1975 – pcmvr (2060), ChessWorld.net, 2003.

5.Bb2 Bd6 6.e4 Nf6 7.d4 (7.Qf3 Nc6–/+) 7...ed4–+ 8.Bd4 Nc6 9.Bb2 Ne4 (9...0–0 10.f3 Be5 11.Be5 Ne5–+) 10.Nh3? (better is 10.Bg7!? Rg8 11.Bb2–+) 10...Qe7 11.Be2 Be5 12.Be5 Qe5 13.Ra2 (13.Nd2 d5–+) 13...d6 14.Rc2 Bh3 15.gh3 d5 16.Bb5 0–0 17.Re2 Nd4 18.Bd3 Nf3 19.Kf1 Qf5 (20.Re3 Nfd2 21.Qd2 Nd2 22.Nd2 Qf6–+) 0–1. suri5 – pcmvr (1965), internet, 2007.

5.Bb2!? Bd6 6.Nf3 –/+.

5.Bb2 Be7 6.d4 ed4 7.Qd4 Nf6 8.Qe3 0–0 9.h3 Re8 10.Qd2 Ne4 11.Qd3? (11.Qf4 d5 12.e3–+) 11...Bc5 12.e3 Be3! 13.fe3 (13.Qe3 Ng3 Pinning (13...Ng3 Decoy); 13.fe3 Qh4 Double attack) 13...Qh4 14.Ke2 (14.Kd1 Nf2 15.Kc2 Nd3 16.Bd3 Re3–+) 14...Qf2 15.Kd1 Qb2 16.Ne2 (16.Ke1–+) 16...Nf2 17.Ke1 Nd3 18.Kd1 Nc6 19.Nec3 Qc1 (19...Qc1 20.Ke2 Re3) 0–1. grahamtrue (2185) – pcmvr (2850), net–chess.com, 2011.

5.Qb3 Nc6 6.ab4 Ra1 7.e3 d6 8.Bc4 Qg5 9.Bf7 Kf8 10.g3 (10.Bg8 Rg8 11.Ne2 Qg2 12.Rg1–+) 10...Qf5 11.Ne2 (11.Bg8 Rb1 12.Qc3 Kg8 13.Ke2 Nd4 14.ed4 Qe4 15.Kd1 Qh1 16.Qc4 Kf8 17.Kc2 Bf5 18.d3 Rc1 19.Kc1 Qg1 20.Kc2 Qf2 21.Kb3 ed4 22.b5–+) 11...Rb1 12.Qc4 (12.Bg8 Rb3 13.Bb3 Qf3–+) 12...Nb4 13.Bd5 (13.0–0 Qf7 14.Qh4–+) 13...Nd3 14.Kf1 Qf2# 0–1. mdf (1805) – ilmarinens (2765), net–chess.com, 2006.

5.ab4 Ra1–+ 6.Bb2 Ra7 7.Be5 –+.

5.ab4 Ra1–+ 6.Qb3? Nc6 7.Nf3 –+.

5.ab4 Ra1–+ 6.Qb3? d6 7.Nf3 (7.Qb2 Ra8–+) 7...Be6 8.Qb2 Ra2 9.Qc3 Nf6 10.d3 (10.d4 ed4 11.Nd4 Qe7–+) 10...Nd5 11.Qb3 Ne3 12.Qc3 Nc2 13.Kd1 Qd7 14.Qc2 (14.e4–+) 14...Rc2 15.Kc2 Qa4 16.Kd2 Qa2 17.Ke3 Qb1 18.Bd2 Qa1 19.d4 (19.Be1–+) 19…Qa3 (20.Bc3 Qc3 21.Ke4 f5#) 0–1. hris – pcmvr (1650), Chesshere.com, 2005.

5.ab4 Ra1 6.Qb3 d6 7.Nf3 Be6 8.Qc3 Rb1 9.e3 Nc6 10.b5 (10.Bb5–+) 10...Nb4 11.Be2 Na2 12.Qc2 (12.Qb2 Rb2 13.Bb2–+) 12...Rc1 13.Qc1 Nc1 14.0–0 Ne2 15.Kh1 e4 (16.Ng1 Ng1 17.Kg1 Qg5–+) 0–1. mdf (1805) – pcmvr (2815), net–chess.com, 2006.

5.e3 d5 6.Qb3 Bd6 7.Nf3 (7.Qd5 Nf6 8.Qb5 Nc6–/+) 7...e4 8.Nd4 Nf6 9.Bb5 c6 10.Ba4 (10.Be2 0–0–+) 10...Nfd7 (10...b5 11.Nb5 cb5 12.Bb5 Bd7 13.Nc3–+) 11.0–0? (11.Qd1–+) 11...Nc5 (12.Bc6 Nc6–+) 0–1. mgokhale (1685) – pcmvr (2225), net–chess.com, 2006.

4.Bb2 Bb4

5.a3 Bc5 6.Be5 Nf6 7.Nc3 Bf2!–+ 8.Kf2 Ng4 9.Ke1 Ne5 10.e4 c5 11.Bb5 Nbc6–+ 12.Nf3 Nf3 13.gf3. ajeffries (1910) – ilmarinens (2765), net–chess.com, 2006.

5.Qb3 Qe7 6.e3 Nf6 7.Bc4 Nc6 8.a3 Bc5 9.Nf3 0–0 10.d4? ed4 11.0–0 de3 12.fe3 Na5 13.Qa4 Nc4 14.Qc4 d5 15.Qd3 Qe3 16.Qe3 Be3 17.Kh1 Ne4 18.Nc3 Nc3 19.Bc3 c5 20.Ne5 Be6 21.Nd3 d4 22.Bb2 c4 23.Nf4 Bf4 24.Rf4 c3 25.Bc1 Rfd8 26.a4 Bb3 27.a5 d3 28.Rf3 d2 29.Bd2 cd2 (30.h3 Ra5 31.Ra5 d1Q 32.Kh2 Qd6 33.Rg3 Bd5–+) 0–1. cindya – pcmvr (1700), net–chess.com, 2006.

5.Be5 d6 6.Bb2 Nf6!? =+.

5.Be5 d6 6.Bb2 Nh6 7.Bg7+= Rg8 8.Bh6 Qf6 9.Nc3 Qh6 10.Nf3 Nc6 11.a3 Bc5 12.Nd5 Kd8 13.d4 Bb6 (14.Nb6 cb6+–). ajeffries (1910) – mdf (1805), net–chess.com, 2006.

5.Be5 d6 6.Bg7 Be6 7.Bh8 Nc6 8.Nf3 +–.

5.Be5 d6 6.Bg7 Qh4 7.Bh8 Bc5 8.e3 Bg4 9.Qb3 Nc6 10.Qb7 Rd8 11.Qc6 Bd7 12.Qb7 Rc8 13.Nf3 Qh6 14.d4 Bb6 15.Nbd2 Ne7 16.Rc1 Qf8 17.Bf6 Qh6 18.Be7 Ke7 19.Nc4 Be6 20.Nb6 Rd8 21.d5 Bf5 22.Qc7 Ke8 23.Bb5 Bd7 24.Nd7 Rd7 25.Qd7 (25...Kf8 26.Qd8 Kg7 27.Rc8 Qg6 28.Qf8 Kf6 29.Qh8 Kf5 30.Bd3 Kg4 31.Qd4 Qe4 32.Qe4 Kh5 33.Qh4#; 25.Bd7 Kf8 26.Qd8 Kg7 27.Rc8 Qh5 28.Qf8 Kg6 29.Qd6 Kg7 30.Qf8 Kg6 31.Rc6 f6 32.Qf6#) 1–0. mburden (2535) – mdf (1805), net–chess.com, 2006.

5.Be5 Ne7 6.a3 Bc5 7.Bg7 Rg8 8.Bb2 d6 9.Nf3 Bg4 10.d4 Bb6 11.e3 Ba5 12.Bc3 Bc3 13.Nc3 Nbc6 14.Qb1 Bf5 15.Qb7+– Qb8 16.Qb8 Rb8 17.d5 Na5 18.e4 (18...Rb3 19.Rc1+– (19.ef5?! Rc3 20.Rd1 Nf5+/–)) 1–0. mburden (2535) – ajeffries (1910), net–chess.com, 2006.

5.Be5 Nf6

6.Qb3 Nc6 7.Bb2 0–0 8.e3 d5 9.Bd3 Ne4 10.Qc2 (10.Nf3 Bf5 11.Qc2 Bd6–/+) 10...Bd6 11.Be4 de4 12.a3 f5 13.Nh3 Be6 14.Qc3 Qe7 15.0–0 Na5 16.a4 Nb3 17.Ra3 Bb4 18.Qe5 Bc4 (18...Ba3?! 19.Ba3 c5 20.Nf4–+) 19.Qe7 Be7 20.Rd1 (20.Rb3 Bb3 21.Be5 Ba4–+) 20...Rfd8 21.Nf4 (21.a5 Ba3 22.Na3 Nd2–+) 21...Ba3 22.Ba3 (22.Na3 Rd2 23.Rd2 Nd2–+) 22...Ra4 23.f3 c5 24.h4 (24.Bb2 Ra2 25.Be5 ef3 26.gf3 Nd2 27.Rd2 Rdd2 28.Nd2 Rd2–+) 24...b5 25.Bb2 Ra2 26.Bc3 (26.Be5 Nd2 27.Nd2 Rdd2–+) 26...b4 27.Be5 Nd2 28.Nh5 (28.Nd2 Rad2 29.Rc1 Rd1 30.Rd1 Rd1 31.Kf2–+) 28...Nf3! 29.gf3 (29.gf3 Rd1#) 29...Rd1 0–1. peteywheatstraw – pvanr (1780), gameknot.com, 2012.

6.Qb3 Nc6–/+ 7.Bc3 Bc3 8.Nc3 d5 9.Nf3 d4 10.Nb1 Qd5 11.Qd5 Nd5 12.Na3?? (better is 12.a3–/+) 12...Ra3–+ 13.g3 (13.e4 Ndb4 14.Kd1 d3–+) 13...Ndb4 14.e3 (14.Kd1–+) 14...Nc2 15.Ke2 Na1 16.ed4 (16.h3 Nc2–+) 16...Bg4 17.Bg2 Nd4 18.Kd1 Nab3! 19.ab3 Ra1 0–1. tradicio – PassedPawn, ChessWorld.net, 2005.

6.Qb3 Nc6 7.Bf6 gf6?! 8.e3 =.

6.Qb3 Nc6 7.Bf6 Qf6 8.Nc3?? (better is 8.Qe3 Kd8 9.Nc3–+) 8...Ra3–+ 9.Qc2 Rc3 (9...Bc3?! 10.dc3 Rc3 11.Qe4 Kd8 12.Rb1–+) 10.Qe4 Be7 11.Rd1 (11.Rb1 Ra3–+) 11...d5! 12.Qb1 (12.Qd5 Nb4) 12...Ra3 13.Nf3 Nb4 14.Rc1 Bf5 (15.d3 Na2 16.Rc7 Bb4 17.Nd2 Qb6–+) 0–1. mgokhale (1630) – pcmvr (1700), net–chess.com, 2006.

6.Bc3 Bc3 7.Nc3 0–0 8.d4 =+.

6.Bc3 Bc5 7.a3 d5 8.e3 d4 9.ed4 Bd6 10.Qe2 Be7 11.Nf3 0–0 12.Qd1 Qd5 13.Be2 Bg4 14.0–0 Bd6 15.Bb4?? (better is 15.h3 Be6 16.Ne5=) 15...Bb4–+ 16.ab4 (16.Nc3 Bc3 17.dc3–+) 16...Ra1 17.Qc2 Nc6 18.Nc3 Rf1 19.Kf1 Qd6 20.Nb5 (20.Ne4 Ne4 21.Qe4 Bf3 22.Bf3 Nd4–+) 20...Qb4 21.Nc7 (21.Qd3 Ra8 22.Ne1 Be2 23.Qe2 Nd4 24.Nd4 Qd4–+) 21...Bf3 22.gf3 Nd4 23.Nd5 (23.Qc4 Qc4 24.Bc4 Rc8–+) 23...Nd5 24.Qc4 Qb1 25.Kg2 Nf4 26.Kg3 Nde2 27.Kg4 Qg6 28.Kh4 Qh5# 0–1. ajeffries (1910) – pcmvr (2815), net–chess.com, 2007.

6.Bc3 Bc5 7.d4 Be7 8.e3 0–0 9.Qc2 d5 10.Nd2 Bd6 11.Ngf3 Re8 12.a4 Nbd7 13.a5 Ne4 14.Ne4 de4 (< 14...Re4 15.Bd3 Re7 16.Bh7 Kh8 17.Bd3+/–) 15.Nd2 Qh4 16.g3 Qh5 (16...Qe7 17.Bg2 Nf6 18.0–0=+) 17.Bg2= (< 17.Ne4 Qf3 18.Nd6 cd6–/+) 17...f5 18.Qb3 Kh8 19.Nc4 Bf8 20.0–0 Qf7 21.Rfb1 Ra6 22.Na3 Qb3 23.Rb3 Nf6 24.Bf1 Ra8 25.Nc4 Nd5 26.Ne5 g6 27.Bb2 Kg7 28.Bb5 Rd8 29.a6 (29.Ba3 Ba3 30.Raa3 g5=) 29...c6 (better is 29...ba6!? 30.Bc6 Ra7–/+) 30.ab7+/– Ra1 31.Bf1 Rf1 32.Kf1 Bb7 33.Rb7 Kg8 34.Nc6 Rd6 (34...Rc8 35.Ne5+/–) 35.Ne5+/– Rb6 36.Rb6 Nb6 37.Bc3 Nd5 38.Ba5 Kg7 39.Ke2 Kf6 40.f3 Ke6 ½–½. pereira – pcmvr, internet, 2007.

6.Bc3 Nc6 7.e3 0–0 8.Nf3 =+.

6.Nc3 Ra5 7.Nf3 Nc6 –/+.

6.e3 0–0 7.a3 Be7 8.Nf3 d5 9.Qc2 (9.Nc3 Nc6 10.Be2 Ne5 (10...Ra3?! 11.Ra3 Ba3 12.Bf6 Qf6 13.Nd5=) 11.Ne5 c6–/+ (worse is 11...Ba3 12.0–0–/+)) 9...Nc6 10.Bb2 Bg4 11.Be2 (11.Nc3–/+) 11...d4 (11...g6!?–/+) 12.0–0 (12.Nd4 Nd4 13.Bd4 Be2 14.Ke2 c5 15.Bf6 Bf6+= (worse is 15...gf6 16.Nc3+/–)) 12...Bd6 (12...Re8 13.Re1+=) 13.Bd4 Bf3 (13...Nd4!? 14.ed4 Re8+=) 14.Bf3= Nd4 15.ed4 c6 16.Nc3 Re8 17.Rfb1 Qd7 18.a4 Bc7 (18...Bb8 19.Qa2=) 19.Qd3 (19.g3 Rab8+=) 19...Be5 (19...Ra5 20.g3 (worse is 20.Rb7 Bh2 21.Kh2 Qb7–/+) 20...Be5 21.Rb4+=) 20.Ne2 Ra7 21.Rb3 Bc7 22.Rab1+= g5 23.g3 g4 24.Bg2 b6 25.Qc4 Qe6 26.Qe6 Re6 27.Nc3 Bd8 28.Rb4 Rd7 29.f3 Be7 30.Rb6 Rd4 31.R6b2 Nd5 32.Nd5 cd5 33.fg4 Ra6 34.Rb7 Bc5 35.R7b5 Rb4 36.Kf1 Rb1 37.Rb1 Ra4 38.Rb5 Be7 39.Rd5 Rg4 40.Bf3 Rg6+= 41.d4 Rd6 42.Re5 Re6 43.Ra5 Re3 44.Be2 Re4 45.d5 Rd4 46.Ra7 Kf8 47.Rd7 Bc5 48.h3 Re4= 49.g4 Re7 50.Rd8 Re8 51.Re8 Ke8 52.Kg2 Ke7 53.Kf3 ½–½. pierred (2420) – pcmvr (2815), net–chess.com, 2007.

6.e3 0–0 7.Bc3 Qe7 8.Nf3 d5 9.Bb4 Qb4 10.Nc3 Bf5 11.Nd4 Bg6 12.Qb3 Nc6 13.Rc1 Qa5 14.Nc6 bc6 15.Be2 Rfb8 16.Qd1 c5 17.Bf3 c4 18.0–0 Rb2 19.Re1 c6 20.Ra1 Nd7 21.Qc1 Rab8 22.Be2 Rc2–+ 23.Qd1 Rbb2 24.Nb1 Nc5 25.Rf1 c3 26.Bh5 cd2 27.Bg6 hg6 28.Qg4 Ne6 29.a4 Rc1 30.Nd2 Ra1 (31.Ra1 Qd2–+) 0–1. mburden (2535) – pcmvr (2815), net–chess.com, 2007.

6.e3 d6 7.Bc3 Bc3 8.Nc3 0–0 9.d4 =+.

6.Nf3 Nc6 7.Bb2 d5 8.e3 0–0 9.Be2 Re8 10.0–0 Be6 11.a3 Bd6 12.Nc3 Ne5 13.Nb5 Nfg4 14.Nd6 Qd6 15.Ne5 Ne5 16.Qc2 Nc4 17.Bc3 Ra3 18.Ra3 Qa3 19.d3 Nb6 20.Rc1 Rc8 21.Ra1 Qd6 22.Qb1 Rb8 23.Ra7 Qc6 24.Qb4 Bf5 25.Ra5 Qg6 26.Qd4 Rc8 27.e4 Bg4 28.Bg4 Qg4 29.h3 Qg6 30.ed5+= Nd7 31.Ra7 Rb8 32.Ba1 Qg5 33.Qc3 f6 34.Qc4 Kh8 35.Bb2 Ne5 36.Qe4 Qh5 37.d6+/– cd6 38.Qb7!+– Qd1 39.Kh2 Rg8 40.f4 Qd3 41.fe5 de5 42.Ra8 Qc4+/– 43.Qb8 h5 44.Qg8 Qg8 45.Rg8 Kg8 46.Kg3 Kf7 47.Kh4 g6 48.Kg3 Ke6 49.Bc1 Kd5 50.Kf3 Kd4 51.Ba3 Kd3 52.Be7 f5 53.Bg5 e4 54.Kf2 Kc4 55.Ke3+/– Kd5 56.Bd8 Ke5+/– 57.Bc7 Kf6 58.h4 Ke7 59.Kf4 Ke6 60.Bb6 Ke7 61.Kg5 Kf7 62.g3 Kg7 63.Bc5 Kh7 64.Kf6 1–0. pierred (2420) – mburden (2535), net–chess.com, 2007.

6.a3 Be7

7.Bb2 0–0 8.e3 d5 9.d4 Bf5 10.Nd2 Bd6 11.a4 Nc6–/+ 12.Ne2? Nb4–+ 13.Bc3 Nc2 14.Qc2–+ Bc2 15.f4 Qe7 16.Nf3 Bb4 17.Ne5 Ne4 18.Rc1 Ba4 0–1. ajeffries (1910) – mburden (2535), net–chess.com, 2006.

7.Nc3 0–0 8.Nf3 d5 9.Nb5 c6–/+ 10.Bc7 Qd7 11.Ne5=+ Qf5 12.Nd4 Qh5 13.Ndf3 Na6 14.Bb6 Nc5 15.e3 Na4 16.Qb3 Bd6–/+ 17.d4. Fritz 8 – Fritz 9, 2007.

7.Nc3 Ra3 8.Ra3 Ba3 9.Nb5 +=.

7.Nc3 Ba3? 8.Nb5 d6 9.Ra3 Ra3 10.Bf6 Qf6 11.Na3 0–0 +–.

7.Nc3 Ba3? 8.Nb5 d6 9.Bf6 gf6 10.Nf3 +–.

7.Nc3 Nc6 8.Bf6 Bf6 9.e3 0–0 10.d4 Re8 11.Nf3 d5 12.Bd3 Ne7 13.Qc2 h6 14.0–0 b6 15.Rfb1 Bg4 16.Ne5 Be5 17.de5. Fritz 8 – Fritz 5.32, 2007.

7.e3 0–0 8.Nf3 d5 9.Qc2 Nc6 10.Bf6 Bf6 11.d4 Be7 12.Bd3 Nb4 13.Bh7 Kh8 14.Qb2 Kh7 15.ab4 Bb4 16.Nc3 Ra1 17.Qa1. Fritz 6 – Fritz 8, 2007.

7.e3 Nc6 8.Bf6 Bf6 9.d4 =+.

7.Nf3 d5 8.Nc3 Nc6 (8...Ba3? 9.Nb5 0–0 10.Na3+–) 9.Bf4 Nh5 (9...Ba3? 10.Nb5 0–0 11.Bc7+– (11.Na3?! Nh5 12.Bg5 f6+/–; 11.Ra3?! Ra3 12.Na3 Nh5+/–); 9...Ra3?! 10.Ra3 Ba3 11.Nb5+=) 10.Bg3 0–0 (10...Ba3? 11.Nb5 Ng3 12.hg3+–; 10...Ng3?! 11.hg3 d4 12.Nb5–/+) 11.e3 Ng3 12.hg3 d4 (12...Ba3? 13.Nb5+–) 13.ed4 Nd4 14.Nd4 Qd4 15.Qb3 (better is 15.Nb5!? Qe5 16.Be2–/+) 15...Rd8 16.Qc2? (16.Bc4 Qd2 17.Kf1 Ra3 18.Qb1 Ra1 19.Qa1–+) 16...Bf5 17.Qc1 Ra3! 18.Ra3 Ba3 19.Qd1 Bc5 20.Qe2 Bb4 21.Rh4 Qc3! 22.Qe3 Qc1 23.Ke2 Rd2 24.Kf3 Qc6 25.Kf4 Rf2! 26.Qf2 Qe4 27.Kg5 Be7 28.Kh5 Bg6 0–1. grahamtrue (2180) – pcmvr (2860), net–chess.com, 2011.

7.Nf3 d5 8.e3 Nbd7 9.Bb2 0–0 10.Nc3 Nb6 11.Qb3 Be6 12.d4 Bf5 13.Be2 Ne4 14.0–0 Bg4 15.Qc2 f5 16.Ne5= Be2 17.Ne2. Comet B25 – Fritz 8, 2007.

6.e3 Nc6

7.Bb2 0–0 8.Nf3 d5 9.a3 Bd6 10.Nc3 Bf5 11.Nb5 Ne4 12.Qb3 Be7=+ 13.Nc3 Nc3 14.Bc3 Ra7 15.Be2 Qd6 16.0–0 Rfa8 17.Bb2 (17.a4 Qe6=+). Comet B50 – Doctor? 3.0, 2007.

7.Bb2 d5 8.Bb5 0–0 9.Bc6 bc6 10.Qc2 Bd6 11.Qc6 Rb8 12.Bd4 Bd7 13.Qc1 c5 14.Bf6 Qf6–/+ 15.Nc3 d4 16.Nd1 Qg6–+ 17.Ne2 Qg2 18.Rg1 Qh2 19.Qc2. mburden (2535) – ilmarinens (2765), net–chess.com, 2006.

7.Bb2 d5 8.Bb5 0–0 9.Nf3 Bf5 10.0–0 Qd6 11.d3 h6 12.Qc2 Na7 13.Ba4 Qa6 14.Rd1 Nc6 15.Bc6+/– Qc6 16.Qc6 bc6 17.Nd4 Bd7 18.Rc1 Ra6 19.Nb3 Rb8 20.Bf6 gf6 21.Kf1. pierred (2420) – ilmarinens (2765), net–chess.com, 2006.

7.Bc3 0–0 8.Bb5 Ra5 9.Bc6 Bc3 10.Nc3 dc6 11.d4 Re8 12.Nge2 Bf5 13.0–0= Qd6 14.Ng3 Bg6 15.Qb3 b6 16.Rfc1 Ra3 17.Qb2. Fritz 5.32 – Comet B50, 2007.

7.Bc3 0–0 8.Nf3 Qe7 9.Qb3 b6 10.Bb5 Bc3 11.Nc3 Ra3 12.Qc4 Nb4 13.Rb1 c5 14.Rb3 Ra5 15.0–0 Na2 16.Ra1 d5 17.Qh4 (17.Qf1 Nc3 18.dc3 Bg4–/+). Comet B25 – Fritz 5.32, 2007.

3.cb4 e6

4.Bb2 Bb4?? 5.Bg7 d5 6.Bh8 +–.

4.Bb2 Bb4?? 5.Bg7 Nf6 6.Bh8 +–.

4.Bb2 Nf6 5.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 a5 4.c3 ab4 5.cb4).

4.Bb2 Nf6 5.Bc3 Nd5 6.Bd4 Nb4 7.Nc3 N4c6 8.Be3 Be7 9.a3 Ra3 10.Ra3 Ba3 11.Qa4 Be7 12.Nf3 0–0 13.h4 d5 14.g4 Nd7 15.g5 Nb6 16.Qg4 e5 17.Qg3 d4 18.Ne5 dc3 19.dc3 Bd6 20.f4 Nd5 21.Bd2 Be5 22.fe5 Re8 23.c4 Nde7 24.h5 Nf5 25.Qg2 Re5 26.g6 fg6 27.hg6 h6 28.Qf2 Qf8 29.Bg2 Nd6 30.Qf8 Kf8 31.Rf1 Rf5 32.c5 Rf1 33.Kf1 Nc4 34.Bf4 Bf5 35.Bc7 Ne3 36.Kf2 Ng2 37.Bd6 Ke8 38.Kg2 Bg6 39.Kf3 Bh7 40.e4 Kd7 41.e5 Ke6 42.Bf8 g5 43.Bh6 Ne5 44.Ke3 g4 45.Bf4 Kd5 46.Be5 Ke5 47.Kf2 Kd5 48.Kg3 Bf5 49.Kf4 Bc8 50.Kg3 Kc5 51.Kf4 Kd4 52.Kg3 b5 0–1. nakpim – stachma501, kurnik, 2012.

4.b5 Bb4 5.Bb2 Nf6 6.e3 0–0 7.Nf3 d5 8.Bd3 Ne4 9.Qc2= f5 10.0–0 Nd7 11.Be2 Ndf6 12.Rc1 Bd6 13.d3 Nc5 14.Be5 Bd7 15.Nc3 Rc8 16.a4 Qe7 17.Bd6 (17.a5 c6 18.Bd6 Qd6+/–). Crafty 20.14 w32 – Crafty 19.01, 2007.

4.b5 d5 5.d4 c5 6.e3 Nd7 7.Nf3 c4 8.Bd2 Ngf6 9.Be2 Ne4 10.0–0 Ndf6 11.Ne5 Nd2 12.Qd2 Qa5 13.Qa5 Ra5 14.a4 Nd7 15.e4 Bb4–/+ 16.Bg4 Ne5–+ 17.de5. EXchess 3.11 – Crafty 19.01, 2007.

4.b5 Nf6 5.Nf3 d5 6.e3 Bb4 7.Bb2 c6 8.Be2= 0–0 9.0–0 Bd7 10.a4 cb5 11.Qb3 Qe7 12.ab5 Ra1 13.Ba1 Ne4 14.d3+= Nf6 15.Bf6 gf6 16.d4 Qd6 17.Rc1. Fritz 5.32 – Crafty 19.01, 2007.

3.cb4 Nf6

4.Bb2 e6 5.a3 c5 6.Nf3 cb4–/+ 7.e3 ba3 8.Na3 Bb4 9.Qb3=+ Qe7 10.Bb5 0–0 11.0–0= d5 12.Rfb1 Bd6=+ 13.Bf1 Na6 14.Nb5=+ Bb4 15.Be5 Nd7 16.Bd4 Bc5 17.Bb2. Fritz 10 – Crafty 19.19, 2007.

4.b5 e5 5.Bb2 Bc5 6.Nc3 d5–/+ 7.Nf3 d4 8.Na4 Bd6 9.e3 de3 10.de3=+ Bb4 11.Nc3 Qd1 12.Kd1 Nbd7 13.Ke2 e4 14.Nd4 Nc5 15.a3 Ba5 16.Na2 Nd3 17.Bc3. Crafty 19.01 – Fritz 10, 2007.

4.b5 e5 5.e3 d5 6.Nf3 e4 7.Nd4 Bc5 8.Be2 Nbd7 9.0–0 0–0 10.Nc3 Re8 11.f3 Ne5 12.fe4=+ de4 13.Nb3 Bd6 14.Bb2 Nd3 15.Bd3 ed3 16.Qf3 Re5 17.e4. Crafty 19.19 – Comet B68, 2007.

4.e3 e5 5.Bb2 =+.

4.e3 e6 5.b5 Be7 6.Nf3 0–0 7.Bb2 c6 8.a4 d5 9.Nc3 Ne4 10.Nd4 e5=+ 11.Nf3 Nc3–/+ 12.dc3 Bd6 13.Be2 cb5 14.Bb5 e4 15.Nd4 Qg5 16.Bf1 Bd7 17.h4 (17.Ba3 Ba3 18.Ra3 Nc6=+). Crafty 19.01 – Crafty 19.19, 2007.

4.e3 g6 5.Bb2 Bg7 6.Bc4 0–0 7.Qf3 c6 8.Qe2 d5 9.Bb3 Bf5 10.Nf3 Nbd7 (10...Na6 11.Bc3–/+ c5 12.d4 Nb4 13.Bb4 cb4 14.0–0 Qd6) 11.Nd4 (11.0–0 Qb6 (11...Re8 12.Nd4 Bb1 13.Rfb1 e5 14.Nf3 Qb6) 12.a3 c5 13.d3 Rfc8 14.Bc3 cb4; 11.d3 Qb6 12.a3 c5 13.Nc3 cb4 14.Nd5 Nd5; 11.d4 Bg4 (11...Qb6 12.a3 Bb1 13.Rb1 Ne4 14.0–0 Ra7; 11...Ra7 12.0–0 Qb6 13.a3 Rfa8 14.Nc3 h6; 11...Qc7 12.0–0 Qb6 13.a3 Ra7 14.Rc1 Rfa8; 11...Re8 12.0–0 Bg4 13.Nbd2 e5 14.h3 Bf3) 12.0–0 Qb6 13.a3 Ne4 14.h3 Bf3) 11...Bb1 (11...Be4 12.f3 Bb1 13.Rb1 Qb6 14.Nc2 e5) 12.Rb1 e5 13.Nc2 Ne4 (13...e4 14.0–0= Qe7; 13...Qe7 14.0–0 e4) 14.0–0= (14.d3 Nd6) 14...f5 (14...Qh4 15.d3 Nef6 16.g3=; 14...Nd6=) 15.f3 (15.d3 Nef6=) 15...Nef6 16.a4 b5 (better is 16...Nh5=) 17.ab5+/– cb5 (17...Qc7 18.bc6 Qc6 19.e4+/–) 18.Qb5 Nb6? (better is 18...Rb8!? 19.Bd5 Kh8+/–) 19.Be5+– Kh8 20.Ra1 Nc4 21.Bc4 dc4 22.Nd4 Ra1 23.Ra1 Qe7 24.Ra6 Nd7 25.Bd6 (25.Bd6 Qf7 26.Ra7+–) 1–0. mtr – piuq, internet, 2009.

4.e3 g6 5.Bb2 Bg7 6.Bc4 0–0 7.Qf3?? e6?? 8.g4 d5–/+ 9.Bb3 Bd7 10.g5 Ne4 11.Bg7 Kg7 12.Ne2 Ng5 13.h4 (13...Nf3 14.Kd1–+). mdf (1805) – ajeffries (1910), net–chess.com, 2006.

4.Nf3 d5 5.Bb2 =+.

4.Nf3 e6 5.Qb3 Nc6 6.b5 Na5 7.Qc2 b6 8.d3 Bb7 9.Nbd2 Bc5 10.e3 0–0 11.d4 Bb4 12.Bd3 Bf3 13.gf3 Re8 14.0–0 c6 15.bc6 Nc6=+ 16.Bb2 Ra5 17.f4. Fritz 10 – Comet B25, 2007.

4.Nf3 e6 5.Qb3 d5 6.d4 =+.

4.Nf3 e6 5.b5 Bc5 6.d4 Be7 7.e3 d5 8.Bd3 c5 9.bc6 Nc6 10.0–0 Nb4 11.Ba3 Bd7 12.Bb4 Bb4 13.Nbd2 0–0 14.Ne5 Qe7 15.Qe2 Rfc8 16.Nd7 Qd7 17.Rab1. Fritz 9 – Comet B25, 2007.

4.Nf3 e6 5.b5 d5 =+.

4.Bb2 e5

5.b5 Bc5 6.e3 d6 7.a4 0–0–/+ 8.a5 Re8 9.Qc2 c6 10.Bc3 Bd7 11.b6 Qe7 12.Ra4 Na6 13.Nf3 e4 14.Ng1 Nd5 15.Ba6 Ra6 16.Ne2 Nc3 (17.dc3 d5–+; 16...f5 17.Nf4 Nf4 18.ef4–+) 0–1. Fritz 9 – Fritz 10, 2007.

5.a3 d6

6.Nc3 d5 7.e3 =+.

6.Nc3 Be7 7.Nf3 e4 8.Nd4 0–0 9.d3 e3 10.fe3= Ng4 11.e4 Bg5 12.Nf3 Be3=+ 13.Qb1 Bf2 14.Kd2 Be3 15.Ke1 Be6 16.Nd1= Bb6 17.Kd2 (17.d4 Nc6=+). Comet B50 – Fritz 10, 2007.

6.e3 c6 7.Be2 =+.

6.e3 Be6 7.Nf3 =+.

6.e3 Be7 7.d4 ed4 8.Bd4 Nc6 9.Bb5 =+.

6.e3 Be7 7.d4 e4 8.d5 Nbd7 9.Bb5= 0–0 10.Nc3 Ne5 11.f4 ef3 12.Nf3 Nfg4 13.Ne5 de5 14.Qf3 Bh4 15.g3 Bg5 16.Nd1 f5 17.Bc4. Fritz 6 – Fritz 10, 2007.

6.e3 Bg4 7.Be2= Qc8 8.d4 Be2 9.Ne2 Nbd7 10.0–0 Be7 11.Nbc3 0–0 12.e4 Nb6 13.Qd3 Rd8 14.Rae1 c5 15.Rc1 Ng4 16.d5 Bg5 17.Rc2. Fritz 6 – Comet B25, 2007.

6.e3 Bg4 7.Be2= Be6 8.Nf3 Be7 9.d4 ed4 10.Nd4= 0–0 11.Bf3 Qc8 12.Nd2 Nbd7 13.Ne6 fe6 14.0–0 Ne5 15.Be5+= de5 16.Qb3 c6 17.Rfd1. Doctor? 3.0 – Comet B25, 2007.

6.Nf3 e4 7.Nd4 Be7 =+.

2.c3 b6

3.a4 Na6 4.b5= Bb7? 5.ba6+– Qb8?? 6.ab7 Qb7 7.d4 0–0–0 8.e3 Nf6 9.Bc4 b5 10.ab5 Qb5 11.Bb5 c6 12.Bf1 c5 13.Ra5 Kb7 14.Qb3 Kc6 15.Nf3 Ne4 16.Qb5 Kd6 17.Qb6 Kd5 18.Qd8 e6 19.Qd7 Nd6 20.Rc5 Ke4 21.Qc6# (21.Nbd2#) 1–0. subroy – idontknow, net–chess.com, 2006.

3.b5 c6 =.

3.b5 Nf6 =.

3.a4 ab4!?

4.cb4 Nc6 5.b5 =.

4.cb4 Nf6 =+.

3.a4 Nc6

4.Qb3 Ba6?? 5.g4?? Qb8?? 6.e4?? Qb7 (7.Ba6 Ra6= (7...Qa6? 8.b5 Qb7 9.bc6 Qc6 10.d3+–); better is 6...Bf1!? 7.Kf1 ab4 8.cb4 e5–/+) 0–1. subroy – idontknow, net–chess.com, 2006.

4.Qb3 ab4 5.cb4 e5 6.b5 =+.

4.b5 Na7 5.Nf3 =.

2.c3 c6

3.a3 d5 4.Nf3 =+.

3.a3 g6 4.Bb2 Bg7 5.d4 d5 6.Nf3 Nd7 7.Nbd2 Ngf6 8.e3 0–0 9.Bd3 e5 10.Ne5 Ne5 11.de5 Ng4 12.Nf3 Ne5 13.Ne5 Be5 14.Qd2 Bg4 15.h3 Bd7 16.0–0 f5 17.f4 Bg7 18.c4 Bb2 19.Qb2 Qe7 20.Qd4 dc4 21.Bc4 Be6 22.Be6 Qe6 23.Qb6 Ra6 24.Qd4 Re8=+ 25.Rf3 Raa8 26.Re1 Qe4 27.Qc5 ab4 28.ab4 Ra4 29.b5 Ra5 30.Qc3 Rb5 31.Rd1 Rd5 32.Qb3 Re7 33.Rd4 Qe6 34.Rd5 Qd5 35.Qa3 Qe4 36.h4 b5 37.h5 b4 38.Qa8 Re8 39.Qb7 c5 40.Qc7 Qe7 41.Qc6–/+ Rd8 42.hg6 h6 43.Rg3 b3 44.Qb5=+ Qe6 45.Qb7 Rd7 46.Qc8 Kg7 47.Qc5 b2 48.Qc3 Qf6 49.Qb3 Rc7 50.Kh2 h5 51.Rh3?? h4 52.g3?? Qc3 (53.Rh4 Qb3 54.Rh7 Kg6 55.Rc7 b1Q 56.Rc6 Kh5 57.Rh6 Kh6 58.g4 Q1c2 59.Kg3 Qe3 60.Kh4 Qcf2#; 52...Kg6?! 53.Rh4 (53.gh4?? Rc1–+) 53...Re7 54.Qg8 Qg7 55.Qb3=) 0–1. Klomp,C – Rietra,P, EVS, 1990.

3.ba5 d5 =.

3.b5 Nf6 4.bc6 Nc6 5.e3 d5 6.Nf3 e5 7.d3 Be7 8.Be2 0–0 9.0–0 h6 10.Nbd2 Qc7 11.Qc2 Bf5 Black intends e4 12.Bb2 (12.e4 Be6+=) 12...e4 13.de4 de4 14.Nd4 Nd4 15.cd4?? (better is 15.ed4 Rfd8 16.c4–/+) 15…Qc2–+ (15...Qc2 16.Bc1 Bb4–+) 0–1. Fournier,Frederic (1975) – gholvebor (2265), Active, 2009.

3.e4 ab4 4.cb4 Nf6 5.Nc3 d5 6.Nf3 de4–+ 7.Ne5 Bf5 8.Bc4 Qd4?? 9.Bb5?? Qe5 10.Bc6 Nc6 11.Qe2 Nd4 12.Qd1 e3! 13.fe3 Nc2 14.Kf2 Ng4 15.Kg1 Na1 16.Bb2 Qc7 17.Ba1 e6 18.Qe2 Bb4 19.Qb5 Qd7 20.Qd7 Kd7 21.Nb5 Bd2 22.h3 Be3 23.Kf1 Bd3 24.Ke1 Ra2 25.Nc3 Ra1 26.Nd1 Rd1 (27.Kd1 Rc8 28.hg4 Rc1) 0–1. MC Q – boa, ChessWorld.net, 2004.

3.Nf3 e6 4.b5 cb5 5.e4 b4 6.a3 bc3 7.Nc3 d6 8.d4 Nf6 9.Bb5 Bd7 10.Bd3 Nc6 11.0–0 Be7 12.Rb1 Rb8 13.Qc2 h6 14.Bf4 Nh5 15.Be3 Nf6 16.d5+= ed5 17.Nd5 Nd5 18.ed5 Ne5 19.Ne5 de5 20.Bb6 Qc8 21.Bc7 Ra8 22.d6 Bf6 23.Be4 Ra7 24.f4+– (24...ef4 25.Bb7 Rb7 26.Qe4 Be6 27.Rb7+–) 1–0. pierre (2055) – ball, internet, 2006.

3.Nf3 g6 4.b5 cb5 5.Qb3 b4 6.cb4 Bg7 7.Bb2 a4 8.Qa3 Nf6 9.e4 0–0 10.Nc3 d5 11.Nd5 Nd5 12.Bg7 Kg7 13.ed5 Qd5 14.Qe3 Qd6 15.a3 Qf6 16.Rc1 Bg4 17.Ne5 Be6 18.Bb5 Nc6 19.Nc6 bc6 20.Bc6 Rac8 21.0–0 Qb2 22.Rb1 Qa2 23.Ba4 Ra8 24.Ra1 Qb2 25.Bc6 Rac8 26.b5 Rfd8 27.a4 Rd2 28.Rfb1 Qc2 29.Be4 Qc3 30.Qc3 Rc3 31.b6 (31...Ba2 32.Rb5+–) 1–0. COMP – NN, 2002.

2.c3 Nf6

3.a3 ab4 4.cb4 d5 (4...e5 5.Bb2 d6 6.Nf3 Be7 7.Qc2 Bg4+=) 5.d3 (5.Bb2 e6+= 6.Nf3 Nbd7 7.e3 Bd6+=) 5...e5–/+ 6.Nf3? (better is 6.Bb2!? Bd6 7.e3 (7.Nf3+= e4+=) 7...0–0+=) 6...Bb4!–+ 7.Bd2 (7.ab4 Ra1) 7...Bd2 (7...Bd6 8.Nc3–+) 8.Qd2 Nc6 9.e3 0–0 10.Be2 Qe7 11.0–0 Bd7 12.h3 d4–+ 13.e4 Ra6 14.Nh2 Rfa8 15.Ng4 Ng4 16.Bg4 Bg4 17.hg4 b5 18.Qb2 Na7 19.Re1 c6 20.Nd2 Nc8 21.Ra2 Ra3 22.Ra3 Ra3 23.Qc2 c5 24.Rb1 Rc3 25.Qb2 b4 26.Qa2 Rd3 27.Nf3 Ra3 28.Qb2 h6 29.Nh4 Qh4 30.Ra1 Ra1 31.Qa1 Qg4 32.f3 Qd7 33.Kf2 c4 34.Qa5 Qd6 35.Ke2 d3 36.Kd2 c3 37.Kd1 Nb6 38.Qa2 Qc5 39.Qb3 Qg1# 0–1. bar (1905) – bonaparte (2155), net–chess.com, 2008.

3.a3 e5 4.Qa4 (4.b5 d5 5.d4 Nbd7 6.Bg5 Be7 7.e3 h6+=) 4...c6 5.b5 Qb6 6.e3 d5 7.d4 e4 +=.

3.Qa4 b6 4.Nf3 Bb7 5.b5 g6 6.d4 Bg7 7.Nbd2 d6 8.e3 0–0 9.Bd3 Nbd7 10.0–0 e5 11.e4 Re8 12.d5 Nc5 13.Qc2 Nh5 14.Bc4 Bc8 15.Nb3 Nb3 16.ab3 f5 17.Ng5 f4 18.Ne6 Qd7 19.b4 Bb7? (19...f3) 20.ba5 ba5 21.Ra4 Nf6 22.Bd2 Ng4 23.Rfa1 Qe7 24.Be2 Qh4 25.Bg4 Qg4 26.f3 Qh4 27.Nc7 1–0. Wall,Bill – Guest753052, playchess.com, 2012.

3.b5 e5

4.e3 d5 (--> 1.b4 e5 2.c3 d5 3.e3 a5 4.b5 Nf6).

4.Nf3 e4 5.Nd4 d5 6.d3 Be7 7.Bf4 0–0 8.Nd2 Nh5 9.Be3 f5 10.g3 f4 11.gf4 ed3 12.Rg1 c5 13.bc6=+ Nc6 14.Qa4 Qe8 15.Bg2= Bd7 16.Bd5 Kh8 17.Nc6 (17.Qc4 de2 18.Ne2 Nf6=). Comet B50 – Crafty 19.19, 2007.

4.Nf3 e4 5.Nd4 d5 6.e3 Bg4 7.f3 ef3 8.gf3 Bh5 9.Nf5 Nbd7 10.Bh3 Ne5 11.0–0 Ne4 12.Bg2 Qf6 13.b6 Ng5 14.d4 Nef3 15.Bf3 Nf3 16.Rf3 Bf3 17.Qf3 g6 18.Qd5 Qg5 19.Kh1 Qf5 20.Qf5 gf5 21.bc7 Rc8 22.a3 Rc7 23.Ra2 Kd7 24.Rb2 a4 25.Rb5 Ke6 26.Ra5 Bh6 27.Ra4 Re8 28.Kg1 Bg7 29.Bd2 Kd5 30.Ra5 Ke4 31.Kf2 Re6 32.Rb5 Rh6 33.Kg2 b6 34.Kh1 Rhc6 35.Kg1 Rg6 36.Kf1 Rcc6 37.a4 Rh6 38.Kg1 Rc8 39.a5 ba5 40.Ra5 Rb6 41.Na3 Kd3 42.Be1 Rb3 43.Nb5 f4 44.Nd6 Rg8 45.Rg5 fe3 46.Nf7 Rb1 47.Kf1 Re1! 48.Ke1 Ra8 49.Kf1 e2 50.Kf2 Kd2 51.Rg1 Rf8 52.Kg3 Rf7 53.Kh3 Re7 54.d5 Bc3 55.Kh4 Rg7 56.Rb1 Rf7 57.Kg4 Rf1 58.Rb6 e1Q 59.Re6 Rg1 60.Kh5 Qf1 61.h4 Qf5 62.Kh6 Bg7# 0–1. Sjeng743 – Pepito103, computer chess game, 2000.

Play 1.b4 at Chessworld.net!

The home of Email Chess on the web!

Chessworld.net on behalf of Marek have set up a continuous stream of 1.b4 tournaments.

These tournaments should always be available to join. As soon as four players are paired, another one will automatically be set up.

    Available lines:
  • 1.b4 (4 players, 1 day/move)
  • 1.b4 (4 players, 10 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 (4 players, 3 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.f4 ef4 4.Bg7 Qh4 5.g3 fg3 6.Bg2 gh2 7.Kf1 hg1Q 8.Kg1 (Kucharkowski-Meybohm gambit, 6 players, 10 days move)
  • 1.b4 e5 2.Bb2 f6 3.e4 Bb4 4.Bc4 (Sokolski gambit, 4 players, 3 days/move)
  • 1.c4 Nf6 2.b4 (English orangutan, 4 players, 3 days/move)
  • 1.e4 c5 2.b4 (Sicilian: Wing gambit, 4 players, 10 days/move)
  • 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 (French: Wing gambit, 4 players, 3 days/move)

Click on the logo below, visit Chessworld.net, register and play 1.b4 against the whole world!

The home of Email Chess on the web!

The home of Email Chess on the web!