CLICK!

Support my work!
Click here for more info!

Flag Counter

TESTI500 Release 2019-01-06
Send your 1.b4 games to me, please. Thank you! /Marek
Marek Trokenheim's homepage
(c) Marek Trokenheim

1.b4 e6 2.Bb2 Nf6 3.b5 b6

(...)

4.a4 a6 5.Nf3 ab5 6.ab5 Ra1 7.Ba1 d6 8.e3 Nbd7 9.Be2 Be7 10.0–0 Nf8 11.Nd4 Bd7 12.Nc6 (12.f4 e5 13.fe5 de5+=) 12...Bc6 13.bc6 Qa8 14.Bf3?? (better is 14.Bf6 Bf6 15.Bb5+=) 14...Qa1–+ 15.Qe2 (15.Nc3 Qd1 16.Rd1 Bd8–+) 15...Qa8 (15...d5 16.c4 Qa6 17.cd5 Qe2 18.Be2 Nd5 19.d4–+) 16.Nc3 (16.c4 g5–+) 16...Ng6 (16...d5 17.e4 Qc6 18.ed5 ed5 19.Ra1–+) 17.Qb5 (17.Nb5 0–0 18.Nc7 Qa4–+) 17...0–0 18.Na4 Ne5 19.Be2 (19.c4 Qa5 20.Qa5 ba5–+) 19...d5 20.Qb3 Qc6 21.d4 Neg4 22.Nc3 Qd6 23.g3 Nh6 24.Nb5 Qd8 25.c4 Ne4 26.cd5 ed5 27.Qc2 Bd6 28.Na7 Qg5 29.Bf3 f5 30.Nb5 Ng4 31.Nd6 cd6 32.Be4 fe4 33.Qd2 Qh5 34.f4 ef3 35.Qa2 f2 36.Rf2 Rf2 37.Qd5 Qd5 (38.e4 Qe4 39.h3 Qg2) 0–1. TIROLOCO – rayban2, Caissa.com, 2004.

4.a4 Bc5 5.Nf3 0–0 6.e3 a6 7.Nc3 c6 8.Bd3 ab5 (8...d5 9.Qe2=+) 9.ab5= Ra1 10.Qa1 Bb7 (10...d5 11.0–0=) 11.Qa7+= Qc7 12.0–0 (12.Na4 cb5 13.Nc5 bc5 14.Bb5 Ne8=) 12...d5 (12...d6 13.Ra1=) 13.Na4 Nbd7 (13...cb5!? 14.Nc5 bc5=) 14.Nc5+/– Ra8?? (14...bc5 15.b6 A) 15...Nb6? 16.Bf6 Nc8 17.Be5 Qe5 18.Qb7+– (18.Ne5?! Na7 19.Nd7 Ra8+=); B) 15...Qc8+/–) 15.Qb7+– Qb7 16.Nb7 (16.Nb7 cb5 17.Bb5+–) 1–0. pierre – rapsodi, internet, 2009.

4.c4 a5 5.a4 Bb7 6.e3 d5 (6...Bb4 7.f4=) 7.Nf3 c5 (7...Bd6 8.cd5 ed5 9.Nc3=) 8.Be2 (8.bc6 Nc6 9.cd5 ed5+=) 8...dc4 (8...Bd6 9.Nc3=) 9.Bc4 (9.0–0 Nbd7+=) 9...Bd6 (9...Nbd7 10.0–0=) 10.0–0 (10.Be2 Nbd7=) 10...0–0 11.d3 (11.Be2 Nbd7=) 11...Nbd7 12.Nbd2 Ng4 (12...Qc7 13.Bb3=) 13.g3 Nge5 (13...h6 14.Qe2=) 14.Rc1 Qf6 (better is 14...Rb8=) 15.e4?? (15.Ne5 Be5 16.d4 cd4+=) 15...Qh6 (better is 15...Nf3 16.Nf3 Qb2–+) 16.Ne5= Ne5 (better is 16...Be5 17.Be5 Ne5+=) 17.d4?? (better is 17.f4 Ng6 18.Bb3+=) 17...cd4–/+ (worse is 17...Nc4 18.Nc4 Rad8 19.Nb6+=) 18.Bd4?? (better is 18.f4 Nc4 19.Nc4–/+) 18...Qd2!!–+ (18...Nc4 19.Nc4 Bc7 20.Na5 Bg3 21.fg3 ba5 22.Qd3+/–) 19.Be5 (19.Qd2 Nf3 Double attack (19...Nf3 Decoy)) 19...Qd1 20.Rfd1 (20.Rcd1 Be5 21.Rd7 Rab8–+ (21...Be4?! 22.Re1–+)) 20...Be5 21.f3 (21.Rd7 Rab8–+ (21...Be4?! 22.Re1–+)) 21...Rfd8 22.Be2 (22.Kf2 Bb2 23.Rb1 Bd4 24.Ke2 Rac8–+) 22...Kf8 23.Kg2 (23.Kf2 Ke7–+) 23...g5 24.Kh3 (24.Kf2 Ke7–+) 24...f5 25.ef5 (25.Bd3 Rd4–+) 25...ef5 26.f4 (26.Rd3 Ke7–+) 26...g4 (26...Rd1 27.Rd1 g4 28.Kh4 Bf6 29.Kh5–+) 27.Kh4 Rd1 (27...Bf6 28.Kh5 Bd5 29.h4 gh3 30.Rd5 Rd5 31.Bf3–+) 28.Rd1 Bf6 29.Kh5 Rd8 30.Kh6 (30.Rd8 Bd8 31.Bd3 Bc8–+) 30...Rd1 31.Bd1 Kg8 32.Bb3 (32.Be2 Bd5–+) 32...Kh8 33.Bc4 Bc8 34.Bf1 (34.Bd5 Be7–+) 34...Be6 35.h3 (35.Bg2 Bb3 36.Bf1 Be7–+) 35...Bb3 36.hg4 (36.h4 Ba4 37.Bd3 Bh4 38.Bf5 Bd1–+) 36...fg4 37.Be2 Ba4 38.Bg4 (38.Kh5–+) 38...Bb5 39.Be6 Bg7 (39...a4 40.Bf7 a3 41.f5–+) 40.Kh5 (40.Kg5 a4–+) 40...Be2 (40...Be2 41.Kg5 a4–+) 0–1. Kostyryachenko,Alexandr – Fedukin,Alexandre (1875), Spring Cup Higher School Realty A, 2012.

4.c4 d6 5.e3 Bb7 6.Nf3 Be7 (6...a6 7.Nc3=) 7.d4 (7.Be2 a6=) 7...Nbd7 (7...a6 8.Bd3=) 8.Bd3 h6 (8...c5 9.0–0=) 9.Nc3 0–0 10.0–0 d5 (10...a6 11.e4=) 11.cd5 ed5 12.Qb3 Bd6 (12...c5 13.bc6 Bc6 14.Rac1+/–) 13.Rfc1 (13.Rac1 Qe7+=) 13...Qe7+= 14.Bf5 (14.Rc2 Rfe8+=) 14...g6 (14...Rfc8 15.a3+=) 15.Bc2 (better is 15.Bd7 Qd7 16.a4+=) 15...Ne4? (better is 15...Rfc8!?+=) 16.Nd5+– Qe6 17.Nc7 White creates threats along the open c–file 17...Bc7 18.Qe6 fe6 19.Be4 Bh2 20.Nh2 (20.Kh2 Be4) 20...Be4 21.Rc7 Nf6 22.Rac1 (22.d5 Bd5 23.Bf6 Rf6+–) 22...h5 (22...Rf7 23.Rf7 Kf7 24.Rc7 Kf8 25.g4+–) 23.a4 (23.f3 Bd3+–) 23...Nd5 (23...a6 24.Ba3 Rfe8 25.f3+–) 24.R7c6 Rae8 (24...Bf5 25.Re1 Nb4 26.e4+–) 25.Ba3 Rf7 26.f3 Ne7? (26...Bd3+–) 27.fe4 (27.fe4 Nc6 28.bc6+– (worse is 28.Rc6 g5+–)) 1–0. Plock,Joerg – Paul, corr, 1999.

4.c4 g6 5.e4 Bg7 6.e5+= Ne4 7.Qc2 Bb7 8.Nf3 d6 9.Bd3 d5 10.Nc3 Nc3 11.Bc3 0–0 12.0–0 a6 13.a4 ab5 14.ab5 Ra1 15.Ra1 Nd7 16.Nd4?? Nc5 17.Bb4? Nd3?? 18.Bf8?? Ne5?? 19.Bg7+– Kg7 20.Qc3 1–0. gtate (1965) – maf (2110), net–chess.com, 2004.

4.d3 a6 5.a4 ab5 (5...Bb4 A) 6.c3 Bc5 (6...Be7 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 d5 10.Nbd2 Nbd7 11.g3 0–0) 7.Nf3 d5 8.Nbd2 0–0 9.g3 Bd7 10.e3 Be7 11.c4 c6; B) 6.Nd2 d5 (6...0–0 7.c3 Bc5 8.d4 Be7 9.Ngf3 d5 10.e3 c5 11.Bd3 Nbd7; 6...Bb7 7.Ngf3 0–0 8.c3 Be7 9.g3 c6 10.c4 d5 11.Bg2 dc4; 6...ab5 7.ab5 Ra1 8.Qa1 d5 9.Ngf3 Nbd7 10.g3 0–0 11.Bg2 Bb7; 6...c6 7.Ngf3 0–0 8.c3 Be7 9.Qb3 Qc7 10.Nc4 d5 11.Nce5 Nfd7) 7.Ngf3 0–0 8.g4 Ng4 9.Bh3 h5 10.Rg1 f5 11.Bg2 Nd7; 5...c6 A) 6.Nd2 ab5 7.ab5 Ra1 8.Qa1 cb5 9.Ngf3 Nc6 10.Nd4 Nd4 11.Bd4 Bb7; B) 6.bc6 Nc6 (6...d5 7.c7 Qc7 8.Nf3 Nc6 9.Nbd2 Bb4 10.g3 e5 11.c3 Bd6) 7.Nf3 Bb4 8.c3 Be7 9.Nbd2 0–0 10.g3 Bb7 11.Bg2 Qc7; C) 6.Nf3 ab5 7.ab5 Ra1 8.Ba1 cb5 9.Nc3 Bb4 10.Qd2 0–0 11.e3 Bb7; 5...Bb7 6.Nd2 d5 (6...Be7 7.Ngf3 0–0 8.g3 c6 9.Bg2 ab5 10.ab5 Ra1 11.Qa1 cb5; 6...Bb4 7.c3 Be7 8.Ngf3 0–0 9.g3 c6 10.c4 d5 11.Bg2 dc4; 6...Bc5 7.Ngf3 0–0 8.d4 Bd6 9.e3 Qe7 10.Bc4 Bb4 11.c3 ab5) 7.Ngf3 Nbd7 8.g3 Bb4 9.Bg2 0–0 10.0–0 Qe7 11.c3 Bd6) 6.ab5 Bb4 (6...Ra1 7.Ba1 d5 (7...Bb4 8.Nd2 0–0 9.Ngf3 Bb7 10.c3 Be7 11.g3 d5) 8.Nd2+= (8.Nf3 Nbd7 9.g3 Bd6 10.Bg2 0–0 11.Nbd2 Bb7) 8...Nbd7 9.Ngf3 Bd6 10.g3 0–0 11.Bg2 Bb7) 7.c3 (7.Nd2 Ra1 8.Qa1 Bd2 (8...d5 9.Ngf3 Nbd7 10.Nd4 Bb7 11.Qa7 Qc8) 9.Kd2 d6= 10.Nf3 Nbd7 11.h4 Nc5) 7...Ra1 8.Ba1 Ba5 (8...Be7 9.Nd2 d5 10.Ngf3 0–0 11.g3 Qd6) 9.Na3 (9.Nf3 0–0= 10.Nbd2 c6 11.Nd4 cb5; 9.Nd2 c6 10.Nc4 cb5 11.Nd6 Ke7) 9...d5 =/+ (9...Nd5 10.Qd2 Qf6 11.d4 Qg6) 10.Nf3 Qe7 (10...Qd6 11.Bb2 0–0) 11.Qb3 (11.Bb2 0–0+= (11...Bc3 Deflection: a3 12.Bc3 Qa3+=); 11.Qc1 Nbd7) 11...e5 –/+ (11...Nbd7–/+) 12.d4 (12.Nc2 Nbd7–/+) 12...ed4 13.Nd4 Qc5 (13...Nbd7!? 14.e3 Ne4–/+) 14.e3= Ne4 The pressure on c3 grows. Black threatens to win material: Ne4xc3 15.Nb1 Qd6 (15...0–0 16.Be2=) 16.Be2 Bd7 (16...0–0 17.0–0=) 17.Bb2 (17.0–0 0–0+=) 17...c5 = 18.bc6 Nc6 19.Nc6 Bc6 20.Ba3 (20.0–0 0–0=) 20...Nc5 =/+ 21.Bc5 bc5 Black has the pair of bishops. 22.0–0 (22.Bb5 0–0 23.Bc6 Qc6+=) 22...0–0 Black castles and improves king safety 23.Rd1 Bc7 24.g3 Qg6 (24...Qf6 25.c4 d4 26.ed4+=) 25.Bf3 d5 draws heavy fire. White threatens to win material: Bf3xd5 25...Rb8 Black threatens to win material: Rb8xb3 26.Qa2 h5 27.Nd2 h4 (27...c4 28.Qa7 Be5 29.Qe7 Bc3 30.Qc7+=) 28.Qa7 (28.Bd5 hg3 29.fg3 Ra8=) 28...Bd6 =/+ 29.Qa6 White threatens to win material: Qa6xc6 29...Bb7 Black threatens to win material: Bb7xa6 (29...Be7 30.Nc4 Qe6 31.Na5=) 30.Qe2 (30.Qa4 Be5=) 30...hg3 (30...c4 31.Nf1 Qf5 32.gh4+=) 31.hg3 Bc6 (31...c4!?+= might be a viable alternative) 32.c4 = 32...Rb2 (32...Rb4=) 33.Rc1 (better is 33.Bd5!? and White is still in the game 33...Bd5 34.cd5+=) 33...Bg3 =/+ 34.fg3 Qg3 35.Kf1 Rd2 Deflection: f3 36.Qd2 Qf3 Overloading Remove defender Deflection 37.Qf2 Qh1 (37...Qh3 38.Ke1 dc4+=) 38.Qg1 White threatens to win material: Qg1xh1 38...Qf3 39.Ke1 dc4 =/+ 40.Rc4 Black has a new passed pawn: c5. 40...Bb5 41.Rc2 Bd3 Black threatens to win material: Bd3xc2 (41...Qe4 42.Rb2 Qa4 43.Rd2+=) 42.Rb2 = 42...g6 (42...f6 43.Kd2 Bf5 44.Qh2=) 43.Qg5 White threatens to win material: Qg5xc5 (43.Kd2 Bc4=) 43...Bf5 44.Qe7?? lets it slip away (44.Rh2 Qa8=) 44...Qg3 (better is 44...Qh1 makes it even easier for Black 45.Kf2 Qh2 46.Kf3 Qb2 47.Qc5–+) 45.Kd2?? (45.Rf2 c4 46.Qd8 Kh7=) 45...c4 (better is 45...Qf2 and Black wins 46.Kc3 Qe1 47.Kc4 Qc1 48.Kd5 Qb2 49.Qc5 g5–+) 46.Qe8 = 46...Kg7 47.Rb8 Qd6 48.Kc3 Qa3 49.Kd4 Qd3 50.Kc5 Qa3 51.Kc4 Be6 52.Kd4 Qd6 53.Kc3 White has a mate threat 53...Qc5 54.Kd2 Qd6 ½–½. Torre Mayo,J – Garcia Cortes Loriente,MJ, Valladolid CC Social, 1985.

4.d4 d5 5.Nc3 Bb4 6.g3 Qd7 7.a4 Ne4 8.Qd3 a6 9.e3 0–0 10.Nge2–/+ Qd6 11.Bg2= Nc3 12.Bc3 Bc3 13.Nc3 Bd7 14.0–0 ab5 15.ab5+= Ra1 16.Ra1 c6 17.e4 c5 18.ed5+/– cd4 19.Qd4 ed5 20.Qd5 Qd5 21.Nd5 Bb5 22.Nb6 Nd7 23.Nd7 Bd7 24.c4 Rc8 25.Rc1 Kf8+/– 26.Bd5 Ke7 27.Kf1 Be6 28.Be6 Ke6 29.Ke2 g5 30.Ke3 f5 31.f4 g4 32.c5 Kd5= 33.c6 Rc6 34.Rc6 Kc6 35.Kd4 Kd6 36.Kc4 h6 37.Kd4 Ke6 38.Kc5 Kf6 39.Kd6 Kg6 40.Ke6 h5?? 41.Ke5+– h4 42.Ke6 (42.Ke6 Kg7 43.Kf5 hg3 44.hg3+–; < 42.gh4 Kg7 43.Kf5 Kf7+–) 1–0. Andy HB – coolerdude, ChessWorld.net, 2005.

4.e3 Bb4 5.c4 (5.Qf3 d5=) 5...0–0 (5...Bb7 6.Nf3=) 6.a3 (6.Qf3 c6=) 6...Ba5 (6...Be7 7.Qf3 c6 8.e4=) 7.Qf3+= c6 8.Nc3 (8.Bf6 Qf6 9.Qf6 gf6=) 8...d5 9.bc6 (9.Rc1 c5=) 9...Nc6 10.cd5 ed5 11.Nb5 (better is 11.Bb5 Bb7 12.Nb1=) 11...Ba6 (11...Ne4 12.Rd1+=) 12.Nc7 (better is 12.Bf6!? gf6 13.Qg3 Kh8 14.Nf3+/–) 12...Qc7= 13.Bf6 (13.Ba6!? Ne4 14.Rd1+=) 13...Bf1+= 14.Qg4 g6 15.Qg5 (15.Kf1 Qd6 16.Qh4 Bd2+=) 15...Qd6–/+ 16.Kf1 Rfe8 (16...Bd2 17.Rd1 Ba5 18.Ne2+=) 17.Nf3 Re6 (17...h6 18.Qh4+=) 18.Bb2 Ne7 (18...f6 19.Qg3+=) 19.g4 (19.Be5 Qc5 20.Nd4 Re5 (20...Bd2?? 21.Ne6 Qc4 22.Kg1+–) 21.Qe5 Bd2+=) 19...f6= 20.Qh6 Qd8?? (better is 20...Nc6=) 21.Ng5! Rd6 (21...fg5 22.Qg7) 22.Qh7 Kf8 23.Qf7 1–0. jaddwarrior (2020) – iln143 (1830), ChessWorld.net, 2015.

4.e3 Bc5 5.Nf3 Bb7 6.Be2 0–0 7.c4 a6 8.a4 d5 9.0–0 dc4 10.Bc4 ab5 11.ab5 Ra1 12.Ba1 Nbd7 13.d4 Be7 14.Nbd2 Nd5 (14...c6 15.bc6 Bc6 16.Qb1=) 15.Qb3 N7f6 16.Bb2 c6 17.e4 Nf4 (17...cb5 18.Bb5 Nf4 19.Qe3+=) 18.Qc2 (18.bc6!? Bc6 19.Ne5+/–) 18...cb5= 19.Bb5 Ne4 (better is 19...Qa8 20.Qc7 Ng6=) 20.Bd3?? (20.Ne4 Qd5 21.Qc7 Qe4 22.Re1 Nh3 23.Kf1–/+) 20...Nd2–+ 21.Qd2 Bd6 22.Bb5?? (better is 22.Qe3–+) 22...Bf3 (22...Bf3 23.Qe3 Bg2–+) 0–1. GuestFYNF – GuestNGHV, freechess.org, 2017.

4.e3 Nd5 5.Bc4 Bb4 6.Bd5 ed5 7.Qg4 g6 8.Bh8 Qe7 9.Qd4 Bc5 10.Qe5 d6 11.Qe7 Ke7 12.c3 f6 13.Bf6 Kf6 14.d4 Bd4 15.cd4 Nd7 16.Nf3 Kg7 17.Nc3 Nf6 18.0–0 Ng4 19.Nd5 c6 20.bc6 Rb8 21.Rfb1 Bf5 22.Rb2 Rc8 23.Ne7 Rf8 24.Nf5 Kf6 25.Nd6 Rd8 26.c7 Ke7 27.c8Q Rc8 28.Nc8 Kf7 29.Na7 Kg7 30.Rb6 Nf6 31.Nb5 Kf7 32.a4 h5 33.Rc1 Ne4 34.Rc7 Ke8 35.Rb8# 1–0. Trkn – FATHER, itsyourturn.com, 2000.

4.e3 Be7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 Be7 4.e3 b6).

4.f3 Bb7 5.c4 d5 6.cd5 Bd5 (6...ed5 7.e3+=) 7.Nc3 Bb7 8.Nh3 c5 9.e3 Nbd7 10.Be2 Be7 11.0–0 0–0 12.Qc2 h6 13.Nf2 Nd5 14.Nd5 Bd5 15.Ng4 h5 16.Qc3 Bf6 17.Nf6 Nf6 18.Qe5 Rc8 19.Qg5 Kh7 20.e4 Bb7 21.Rac1 Qd6?? (better is 21...Kg8+/–) 22.e5+– Qd5 (22...Qd7 23.ef6 g6 24.Be5+–) 23.Bc4 (23.Bc4 Qd8 24.ef6+–) 1–0. usingprogram (1990) – leonpopaprani, kurnik, 2011.

4.f3 Be7 5.Nc3 0–0 6.e3 a6 7.a4 Bb7 8.Bd3 d5 9.Nge2 c5 10.bc6 Nc6 11.0–0 Bd6 12.Qe1 Ne5 13.Ba3 Ba3 14.Ra3 Rc8 15.Qg3 Nd3 16.cd3 a5 17.Nd4 Ba6 18.Nce2 Nd7 19.Rb1 Qe7 20.Rbb3 Nc5 21.Rc3 Qd7 Attacking the isolated pawn on a4 22.Nf4 Kh8 (22...Na4? 23.Nh5 f5 24.Rc8 Bc8 25.Ra4+–) 23.Nh5 Rg8 24.h3 Na4 25.Rc8 Bc8 26.Ra1 (26.Qe5 b5–/+) 26...Ba6–+ 27.Rc1 Nc5 28.Rb1–/+. usingprogram – joule, internet, 2011.

4.Nf3 a5 5.c4 g6 (5...Be7 6.g3=) 6.Nc3 Bg7 7.d4 d6 8.e4 0–0 9.Bd3 Nbd7 10.0–0 h6 11.Bc2 e5 12.de5 Ne5 13.Ne5 de5 14.Nd5 Re8 15.Qd3 Qd7 16.a4 Bb7?? (better is 16...Qd6+/–) 17.Nf6+– Bf6 18.Qd7 (18.Qd7 Rac8 19.f4+–) 1–0. nii_sama – Sirprocyon, ChessWorld.net, 2015.

4.Nf3 c6 5.c4 c5 6.g3 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Be7 10.d3 d6 11.Bg2 h6 12.0–0 0–0 13.Nc3 Qc7 14.Qc2 Nbd7 15.Bb2 Bb7 16.Ra1 Ra8 17.Ra8 Ba8 18.e3 d5 19.Qa4 Qb8 20.Ne2 dc4 21.dc4 Be4 22.Qd1 Qa8 23.Nc3 Bb7 24.Nh4 Bg2=+ 25.Ng2 Ne5 26.Qe2 Qf3 27.Qf1 Qh5 28.Nf4 Qf5–/+ 29.Na4 Nf3 30.Kh1 Qe4 31.Ng2?? Nd2 (31...Nd2 32.Qe1 Nc4 33.Bf6 Bf6–+ (33...gf6?! 34.Qd1–/+)) 0–1. algernon (2245) – bigal (2210), net–chess.com, 2010.

4.Nf3 d6 5.Nc3 Be7 6.e4 Bb7 7.Bc4 0–0= 8.0–0 Ne4 9.Ne4 Be4 10.Qe2 d5 11.Bd3 Bd3 12.cd3 Bf6 13.Bf6 Qf6 14.Ne5 ½–½. Anonymous – Anonymous, internet, 2011.

4.Nf3 Qe7 5.e3 Qb4 6.Bd4 Bc5 7.Nc3 Bd4= 8.Nd4 Bb7 9.Be2 Bg2 10.Rg1+= Bd5 11.Nd5 ed5 12.Rg7 a6 13.Bh5 Rf8 14.Qf3 Nh5 15.Qh5+/– ab5 16.Qd5 Qb2?? 17.Qe5+– (17.Qe5 Kd8 18.Ne6 de6 19.Qb2+–) 1–0. pierre – wxds, internet, 2009.

4.Nf3 h6 5.e3 Bb7 6.d4 (6.Be2 a6=) 6...g6 (6...a6 7.c4=) 7.Bd3 Bg7 (7...a6 8.0–0+=) 8.0–0+= c6 (8...a6 9.a4+=) 9.c4 cb5 10.cb5 0–0 11.Nc3 d6 12.Rc1 (12.Qe2 a6+=) 12...Nbd7 (12...a6 13.a3+=) 13.a4 (13.Qe2 Qe7+/–) 13...e5 (13...a6 14.Ba3 Qe7 15.ba6 Ba6 16.Ba6 Ra6 17.Nb5+/–) 14.de5 (14.e4 d5 15.ed5 Nd5 16.Nd5 Bd5 17.Ne5 Qg5+/–) 14...de5+= 15.Bc4 (15.Be2 Qe7=) 15...e4 (15...Rc8 16.Nd2+=) 16.Nd4+= Qe7 17.Qb3 (17.Nc6 Bc6 18.bc6 Nc5+=) 17...Rac8 (17...Nc5 18.Qc2+=) 18.Nce2 (18.Rfd1 Rfd8+=) 18...Nh5 (18...Nc5 19.Qb4=) 19.Ba3 (better is 19.Rfd1+=) 19...Qe8?? (better is 19...Nc5 20.Qa2 Be5=) 20.Bf8+– Bf8 21.Nc6! Bc6 22.bc6 Rc6?? (better is 22...Nc5 23.Qb1 Qc6+/–) 23.Bf7!+– Qf7 24.Qf7 Kf7 25.Rc6 1–0. Wall,Bill – Merimapay, internet, 2005.

4.f4 Bb7 5.Nf3 c5 (5...a6 6.e3+=) 6.e3= d6 7.Be2 Nbd7 (7...Be7 8.Nc3=) 8.0–0 Be7 9.a4 a5 (9...0–0 10.Nc3=) 10.ba6 Ba6 11.Ba6 Ra6 12.Nc3 (12.Qe2 Qa8=) 12...0–0 13.Nb5 Ne8 (13...c4 14.d3=) 14.Bc3 (14.c4 Bf6 15.Bf6 Ndf6=) 14...Qa8+= Exerts pressure on the isolated pawn 15.Qe2 Bf6 (15...d5 16.f5+=) 16.d4 (16.Qd3 d5=) 16...Be7 (16...d5 17.Rfb1+=) 17.Ra2 (17.e4 Ndf6 (17...Ra4?? 18.Ra4 Qa4 19.Ra1 Qa1 20.Ba1+–) 18.dc5 Ne4 19.cb6 Nc3 20.Nc3 Rb6=) 17...Ndf6 (17...d5 18.Rfa1+=) 18.Rfa1 White intends a5 18...Nd5 (18...Ne4 19.dc5 bc5 20.Nd2+=) 19.Be1= f5 (19...cd4 20.Nfd4 Ndf6 21.c4=) 20.a5 (20.c4 Nb4 21.Bb4 cb4+=) 20...Nb4 (20...ba5 21.Ra5 Ra5 22.Ra5 Qc6=) 21.dc5 (21.Bb4 cb4 22.c3 b3= (worse is 22...ba5 23.cb4 Bd8 24.Nd2+/–)) 21...dc5 22.Qc4 ba5 (better is 22...Qd5!? 23.Qd5 Nd5=) 23.Ra5+/– Opening the a–file gets White a lot of play. 23...Ra5 A deflection (23...Qe4 24.Qe4 fe4 25.Ra6 Na6 26.Ra6 ef3 27.gf3+–) 24.Qe6 Theme: Double Attack 24...Rf7 25.Ra5 Do you see the mate threat? 25...Qd5 (25...Qe4 26.Qe4 fe4 27.Bb4 cb4 28.Ne5+/–) 26.Qd5 Nd5 27.Ne5 Rf8 28.Nd7 (28.c4 Ne3 29.Bf2 Nd1+–) 28...Ne3 29.Nf8 Nc2? (better is 29...Kf8 30.Na3 Nd5+–) 30.Nd7 Ne1 31.Ra8 (31.Ne5 Bf8 32.Ra8 Nf6+–) 31...Nd3 32.Re8 Kf7 33.Rc8 Nf4 (33...Ke6 34.Rc7+–) 1–0. Heinzel – Thiel, 1978.

4.f4 Be7 5.c4 Ne4 6.Nf3?? (better is 6.Qc2 Bb7 7.Nf3= (7.Bg7 Bf6 8.Bh8 Bh8–/+)) 6...Bh4–+ 7.Nh4 (7.g3 Ng3! 8.Bg2 Nh1 9.Kf1–+) 7...Qh4 8.g3 Ng3! 9.Bg2 (9.hg3 Qg3) 9...Nh1 10.Kf1 Qf4 (10...Qf2) 11.Kg1–+ Nf2 12.Qf1 Nh3 13.Bh3 Qf1 14.Bf1 0–0 15.Nc3 Bb7 16.Bg2 d5 17.cd5 ed5 18.Nd5= Nd7?? 19.Nc7?? Rac8 20.Bb7 Rc7 21.Bc6 Nc5 22.Ba3 Rd8 23.d3 Ne6 24.Rd1? Nd4–+ 25.Bb2 Ne2 26.Kf2 Nf4 27.Be5 Nh3 28.Kg3 Rc6?? 29.bc6+/– Ng5 30.c7 Rc8 31.Rc1 Ne6 32.d4 f6 33.d5+/– fe5 34.de6 Kf8 (35.Rc6 Ke7+/–). zobec – willem, Caissa.com, 2004.

4.g3 d5 5.Bg2 Bd6 6.Nc3 Bb7 7.e3 0–0 8.Qe2 (8.Nge2 a6+=) 8...Nbd7 9.d4 (9.Nf3 e5+=) 9...Bb4 (9...a6–/+) 10.0–0–0 (10.a3 Ba5+=) 10...Bc3 (10...a6 11.Kb1–+) 11.Bc3–/+ a6 12.f3 (better is 12.Bb4!? Re8 13.Kb1–/+) 12...ab5–+ 13.e4 (13.Qb5 Ra2 14.Qb3 Ra7–+) 13...de4 14.fe4 Ra2 15.h4 (15.Re1 c6–+) 15...Qe7 (15...Qa8 16.Re1 Qa3 17.Kd2–+) 16.Qb5 (16.Nh3 Qa3 17.Kd2 b4–+) 16...Ne4 17.Bb4 (17.Bb2 Rfa8 18.Nh3 Nd6–+) 17...c5 18.dc5 (18.Bc5 Ndc5 19.Ne2 Ng3 20.Bb7 Ne2 21.Kd2 Nd4 22.Qc4 Rc2 23.Qc2 Nc2 24.Bg2–+) 18...Rfa8 (18...Ra1 19.Kb2 Qf6 20.Rd4 Qd4 21.c3 Qd2 22.Ka1 Qc1 23.Ka2 Ra8 24.Ba5 Bd5 25.c4 Ra5 26.Qa5 Bc4) 19.Qd7–/+ Ra1 20.Kb2 Qf6 21.Rd4?? (21.Qd4 Rd1 22.Qf6 gf6 23.Ne2 Rh1 24.Bh1 bc5 25.Be4 Be4 26.Bc5 Rb8 27.Kc1–+) 21...R8a2 (better is 21...Bd5 22.Qd5 ed5–+) 22.Kb3 Do you see the mate threat? 22...Bd5 (22...Nc5 23.Bc5 Bd5 24.Bd5+–) 23.Rd5 Ra3 24.Kc4 Threatening mate... how? (24.Ba3 Theme: Deflection from c3 24...Qc3 The nicest combinations are those leading to) 24...ed5 25.Kd5 Rd1 26.Ke4 Rd7 27.Ba3 Qc6 28.Ke3 Qg2 29.c6 Rc7 30.Bd6 Rc6 31.Ne2 Qh1 32.Bb4 (32.Bf4 Re6 33.Kd2 Qd5 34.Kc3 Re2 35.Be5 Qe5 36.Kb3 Re3 37.Ka2 Qa5 38.Kb2 Qb4 39.Kc1 Re1) 32...Rc2 33.Nd4 Qg2 (33...Rc4 34.Bd2 Qg1 35.Ke2 Qd4 36.Bf4 Rc2 37.Kf3 Qd5 38.Ke3 f5 39.h5 Qe4) 34.Be1 (34.Nc2 Qc2 35.Bd2–+) 34...Rc5 35.Nf3 Rf5 36.Nd2 Re5 37.Kf4 Re1 38.Nf3 Rf1 (38...Rf1 39.Ke4 Qf3 40.Kd4 Qg3 41.h5 Rf4 42.Kd5 Qc3 43.Kd6 Rd4 44.Ke7 Qe3) 0–1. Haugen,Brett – Foster,Will, Telecomm, 1995.

4.c4 a6

5.a4 ab5 6.ab5 Ra1 7.Ba1 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.a4 ab5 5.ab5 Ra1 6.Ba1 b6 7.c4).

5.Qa4 Bb7 6.Nc3 (6.Nf3 ab5 7.Qb5 Nc6–/+) 6...ab5–/+ 7.Qb5 Be7 (7...Nc6 8.Qg5–/+) 8.Qg5 (8.Nf3 0–0+=) 8...Ra5 (8...0–0 9.Nf3–/+) 9.Qg7 (9.Qg3 0–0+=) 9...Rg8–/+ 10.Qh6 Rh5 11.Qe3 (11.Qf4 e5 12.Qe3–+) 11...Bg2 (11...Ng4!? 12.Qd3 Nf2 13.Kf2 Bh4 14.g3 Bh1–+) 12.Bg2+= Rg2 13.Nf3?? (better is 13.Nh3+=) 13...Ng4–+ 14.Qd4 Bf6 (14...Nf2?! 15.Qh8 Bf8 16.Rf1+=) 15.Qf4 e5 (better is 15...Rf5 16.Qg3 Rg3 17.hg3–+) 16.Qg3 (16.Ne5 Be5 17.Qe4 Rhh2 18.0–0–0–+) 16...Rg3 17.fg3 e4! 18.Ne4 A pinning theme (18.Ng1 Be5 19.e3 Bg3 20.Ke2 Qf6 21.Ne4 Qb2 22.Ng3 Re5–+) 18...Bb2 19.Rb1 Qe7 20.d3 (20.Nf2 Nf2 21.Kf2 Qf6–+) 20...Ba3 (20...f5 21.Nf2 Bc3 22.Kf1 Ne3 23.Kg1–+) 21.0–0 Bc5 (21...Ne3 22.Rf2–+) 22.Kh1 Nc6 23.h4 (23.Nc5 Rc5 24.Rb2 Ne3–+) 23...Nce5 (better is 23...Ne3 24.Rfc1–+) 24.d4 (24.Nh2 Rh4! 25.gh4 Qh4 26.Rf2 Bf2 27.Nf6 Ke7 28.Nd5 Kd8 29.Kg2 Qh2 30.Kf1 Qg1) 24...Bd4! 25.Nd4 Rh4! 26.Kg1 (26.gh4 Qh4 A beautiful mate combination) 26...Rh3 27.c5 (27.Nf5 Qa3–+) 27...Qf8 (better is 27...Ng6 28.Nd6 cd6 29.Nf5–+) 28.cb6 (28.Nf5 Nc4 29.Rbc1–+) 28...Qh6 29.Nf3 Rh1 30.Kg2 0–1. Schwab,Carsten – Fischer,G, Silvaplana op3, 1993.

5.Nf3 ab5 6.cb5 Bb7 7.e3 Be7 8.d4 0–0 9.Nc3 Ba3 10.Rb1 Nd5 11.Qc2 Bb4 12.Be2?? Ra2 0–1. White – Coltharp, email 4AMM–06 1997.

5.Nf3 ab5 6.cb5 d5 7.e3 Bd7 8.a4 c6 9.Be2 c5 10.Nc3 c4 11.0–0 Bc8 12.Ne5 Be7 13.Nc6 Nc6= 14.bc6 Qc7 15.Nb5 Qc6 16.d3 Ba6 17.Nd4 Qc7 18.Rc1 0–0 19.dc4 Bc4 20.Bc4 dc4 21.Nb5 Qc5?? 22.Bd4?? Qb4 23.Bb6 Qa4–/+ 24.Nc7 Qc6?? 25.Na8+= Qa8 26.Rc4 Nd5? 27.Bd4+– Qa6 28.Qc1 f6 29.Rc6 Qb7 30.Re6 Bd8 31.Bc5 Rf7 32.Qb1 Qb1 33.Rb1 Be7 34.Rb8 Bf8 35.Bf8 Rf8 36.Rf8 Kf8 37.Rd6 Ne7 38.Rd8 Kf7 39.f4 Kg6 40.e4 h6 41.Ra8 Nc6 42.h4 f5 43.e5 Kf7 44.Kf2 Ke6 45.Ke3 g6 46.g3 h5 47.Ra6 (47…Kd7 48.Kd2+–) 1–0. stoker – LOWLIFE, Caissa.com, 2004.

4.c4 c5

5.Na3 d5=.

5.bc6 dc6 6.Nf3+=.

5.bc6 Nc6 6.Nc3 Be7 7.Nf3 0–0 8.e4 d6 (8...d5 9.cd5 ed5 10.Bb5+=) 9.d4= Qc7 (9...Bb7 10.Bd3=) 10.Be2 (10.Bd3 Nb4=) 10...Bb7 (10...Ba6 11.Nb5 Qd7 12.d5 ed5 13.cd5=) 11.Rc1 (11.0–0 Na5 12.Nd2 Rfc8=) 11...h6 (11...Rfc8 12.0–0=) 12.0–0 Nh7 (12...Na5 13.Qd3=) 13.d5 (13.Nd5 Qd7 14.Ne7 Ne7+=) 13...Nd8 14.Nb5 Qd7 15.Qb3 (15.e5 de5 16.Ne5 Qc8+=) 15...e5 16.a4 (16.Qe3 f5+=) 16...Ba6 (16...Ng5 17.Ng5 Bg5 18.Rb1+=) 17.Rc2 (17.Qe3 Nf6+=) 17...f5 (17...Nf6 18.Qd3+=) 18.ef5 Rf5 (18...Nb7 19.Ba3+=) 19.Qd3 (19.a5 Rb8+=) 19...Rf7 (19...Nb7 20.Nfd4 Rf6 21.Ne6+=) 20.Nd2 (20.Be5 de5 21.Ne5 Qc8+/–) 20...Nb7 21.Ne4 (21.Qg3 Rf4 22.Nb3=) 21...Bb5 (21...Nf6!?=) 22.ab5+/– Nf6 (22...Ng5 23.Bh5 Rff8 24.f4 Ne4 25.Qe4+=) 23.h3 (23.f4!?+/–) 23...Ne4= 24.Qe4 Nc5 25.Qe3 (25.Qg4 a5+=) 25...Bg5= 26.Qg3 (26.Qc3 a5=) 26...Qf5 27.Bd1 Ne4 (27...a6!?=) 28.Qg4 (28.Qd3 Nc5 29.Qf5 Rf5+=) 28...Rf6 (28...a5 29.ba6 Ra6 30.Qf5 Rf5 31.Bg4+=) 29.Qf5+/– Rf5 30.Re2 (30.Bg4 Rf6+/–) 30...Nc5 (30...Nd2 31.h4 Bf4 32.g3 Nf1 33.gf4 Rf4 34.Rc2+=) 31.Bc2 (31.Ba3 a5+=) 31...Rff8 (31...Rf4!? 32.Bc1 Rc4 33.Bg5 hg5+=) 32.g3 (32.Ba3 a5+=) 32...Bf6 (32...a5 33.ba6 Ra6 34.h4+=) 33.Ba3 (33.Ra1 a6+=) 33...Rac8 (33...a5 34.Bc5 dc5 35.Be4+/–) 34.Ra1 (better is 34.Bf5 Rc7 35.f4 ef4 36.Bc5 Rc5 37.Be6 Kh7 38.Rf4+/–) 34...Rf7? (34...Rc7 35.Bc5 Rc5 36.Ra4+/–) 35.Bc1 (better is 35.Bf5!? Ra8 36.Bc5 bc5 37.Be6+–) 35...g5 (35...e4 36.Ra3 Nd3 37.Bd3 ed3 38.Re4+=) 36.Re3 (36.Ra2 Kg7+=) 36...Kg7 (36...e4 37.Raa3=) 37.Rea3 (37.Bb2 Nd7 38.Bd3 e4 39.Bf6 Nf6+=) 37...Rcc7 (37...Nb7 38.Be3 Na5 39.c5 dc5 40.Be4=) 38.Be3 (38.Bb2 Nb7+=) 38...e4 39.Re1 Bb2 (39...Nd3!? 40.Bd3 ed3=) 40.Bc5+/– Rc5 41.Ra2 (41.Ra4 Bd4 42.Re4 Rf2 43.Rd4 Rc2 44.Ra7 Kg6+–) 41...Bd4 (41...e3 42.fe3 Be5 43.Ra4 Bg3 44.Rf1+=) 42.Bb3 (worse is 42.Be4 Rc4 43.Rae2 Rfc7=) 42...Re7 (42...Rf3 43.Re4 Bf2 44.Kg2 (44.Rf2?! Rg3 45.Kh2 Rb3=) 44...Rg3 45.Kf2 Rb3 46.Ra7 Kf8 47.Rd7 Rb2 48.Kf1 Rb1 49.Ke2 Rb2 50.Ke3 Rb3 51.Kd2+–) 43.Rae2+/– Rf7 (43...e3 44.fe3 Be5+/–) 44.Kg2 (44.Rd1 Be5 45.Re4 Rf3+–) 44...Rcc7 (44...Rc8 45.Bc2=) 45.g4 (better is 45.Rd1!? Bc5 46.Bc2+/– (worse is 46.Re4 Rf2 47.Kh1 Rf3–/+)) 45...Rf3 (45...Rf4 46.Re4 Rf2 47.Kh1=) 46.Re4 Rf2 47.Kg3? (47.Kh1 Be5 48.R1e2= (worse is 48.Re5 de5 49.Re5 Rf3–/+)) 47...Bc5?? (better is 47...Rcf7 48.Bd1 Rd2–/+) 48.Re7+= Rf7 (48...Re7 49.Re7 Kg6 50.Ra7+=) 49.Rc7+/– Rc7 50.Bc2 Bb4 51.Re4 Bc5 (51...Bc3 52.Kf3+=) 52.Re6+/– Bb4 (52...Rc8 53.Rg6 Kf7 54.Rh6+/–) 53.Bd3 a6 (53...Bc3 54.Rg6 Kf8 55.Kg2+–) 54.ba6 (better is 54.Rg6 Kf8 55.ba6+–) 54...Bc5? (better is 54...Ra7 55.c5 Bc5 56.Rg6 Kf8 57.Rh6 Bd4+–) 55.Rg6 Kf8 56.Rh6 Bb4 (56...Bd4+–) 57.Rh7 (57.Rh7 Rc5 58.a7+–) 1–0. Wessel,Volkmar – Schubbe,Bruno, Schleswig Holstein–ch, 1988.

5.Nf3 a6 6.Na3=.

5.Nf3 Bb7 6.d3 (6.Nc3 a6+=) 6...d5 (6...a6 7.Nc3=) 7.Nbd2 Nbd7 (7...a6 8.a4=) 8.g3 (8.cd5 Bd5 9.e4 Bb7=) 8...Be7 9.Bg2 (9.Bh3 0–0=) 9...0–0 (9...a6 10.ba6 Ra6 11.0–0+=) 10.0–0 (10.a4 Qc7=) 10...Qc7 (10...a6 11.a4=) 11.a4 (11.Qb3 a6+=) 11...a5 (11...a6 12.Qc2=) 12.ba6 (12.cd5 ed5 13.Rc1 Rfe8=) 12...Ra6+= 13.Qb3 (13.cd5 ed5 14.Nb1 Ne8=) 13...Rfa8 (13...d4 14.Rfe1+=) 14.Ra2 (14.Nb1 d4 15.Na3 Bc6= (15...Ra4?? 16.Nb5 Ra1 17.Nc7 Rf1 18.Kf1+–)) 14...Bc6 (14...d4 15.e3 de3 16.fe3–/+) 15.Rfa1 (15.cd5 ed5 16.Rfa1 Bd6+=) 15...Qa7 (15...d4 16.e3 de3 17.fe3–/+) 16.Qc3 (16.d4 Ba4 17.Qe3 b5 18.cb5 Bb5 19.Ra6 Ba6 20.dc5 Qc5–/+) 16...Qb7 (16...d4 17.Qc2+=) 17.Qc2 R8a7 (17...Bd6 18.d4+=) 18.Nb1 (18.e3 Qa8+=) 18...d4 19.Ne1 (19.Nbd2 Qa8–/+) 19...Bg2 (19...Ne5 20.Nd2–/+) 20.Ng2 Nb8 (20...Ne5 21.Ra3–/+) 21.Bc1 (21.Ra3 Nc6–/+) 21...Nc6 22.Bd2 Nd7 (22...Qa8 23.Qb2–/+) 23.Qb3 (23.Na3 Ra4 24.Nb5 Ra2 25.Ra2 Ra2 26.Qa2 g6–/+) 23...f5 (23...Nb4 24.Bb4 cb4 25.Nd2–/+) 24.Nf4 Kf7 25.Qd1 (25.Na3 Ra4 26.Nb5 Ra2 27.Ra2 Ra2 28.Qa2 Nf6–/+) 25...g5 (25...Ra8 26.Qc2–/+) 26.Ng2 (26.Nh3 h6–/+) 26...Kg6 27.f4 h6 (27...g4 28.e4–/+) 28.Kf2 (28.e4!?–/+) 28...Bf6 (28...e5 29.fg5 hg5 30.h4–/+) 29.Qb3 (29.h4 g4–/+) 29...Qa8–+ 30.Kg1 e5 31.Ra3 (31.fg5 hg5 32.e4 de3 33.Be3 f4–+) 31...Bd8 (31...ef4 32.gf4 g4 33.Qb5–+) 32.Qd1 (32.fg5 hg5 33.Qd1 Nf6–+) 32...ef4 33.gf4 g4 (33...Bf6 34.Be1–+) 34.e4 de3! 35.Be3 (35.Be3 Bf6 Combination; 35.Ne3 Nd4 Combination) 35...Bf6 36.Nc3 Bc3 (36...Nd4 37.Ne1–+) 37.Rc3–/+ Ra4 38.Rac1 (better is 38.Nh4!? Kf6 39.Rb1–+) 38...Nd4–+ 39.Bd4 cd4 40.R3c2 Nc5 (40...Kh7 41.Rb1–+) 41.Nh4 Kf6 42.Rb2 Qc6 (42...Qd8 43.Rcb1 R4a6 44.Re2–/+) 43.Rcb1 R4a6 44.Re2 Ra3 (44...Na4 45.Re5 Nc3 46.Rf5 Kg7 47.Qg4 Kh7=) 45.Re5+= Rg7?? (better is 45...Nd3 46.Rf5 Kg7–/+) 46.Rf5+– Ke7 47.Qe2 Kd7 (47...Ne6 48.Re1 Ra5+–) 48.Rd5 Kc8 49.Nf5 Nd3 (49...Rd3 50.Ng7 Rb3 51.Rb3 Nb3 52.Qe7+–) 50.Ng7 (better is 50.Ne7 Kb7 51.Nc6+–) 50...Nf4 51.Qg4 Kb7 52.Qd7 (52.Qf4?? Qg6 53.Rg5 Qb1 (53...hg5 54.Qf5 Qf5 55.Nf5+–) 54.Qf1 Qf1 55.Kf1 hg5–+; worse is 52.Rd4 Nh3 53.Qh3 Rh3–+) 52...Qd7 53.Rd7 Kc6 (53...Kc8 54.Rf7 Nh3 55.Kg2+–) 54.Rf7 Ne2 (54...Nh3 55.Kg2 Ng5 56.Re7 Ra2 57.Kg3 Ra3 58.Kg4+–) 55.Kf1 (better is 55.Kf2!? Nc3 56.Ne8 b5 57.cb5 Kc5 58.Rf5 Kb6 59.Rf6 Kc5 60.Rc6 Kd5 61.Nc7 Ke4 62.Re1 Kd3+–) 55...d3 56.Ne6 Nc3 (56...h5 57.Rc7 Kd6 58.Rb6 Ke5 59.Rc5 Ke4 60.Rh5 Ra1 61.Kf2+–) 57.Rc7 Kd6 58.Rb6 Ke5 59.Rd7 Ra1 60.Kg2 Ra2 (60...Rb1 61.Rb1 Nb1 62.Nc5+–) 61.Kh3 d2 (61...Na4 62.Ra6 Nc3 63.Ra2 Na2 64.Nc5+–) 62.Ng7 d1Q (62...Kf4 63.Re6 Ra5 64.Rd2 Ne4+–) 63.Re6 (63.Rd1?! Nd1 64.Rh6 Nf2 65.Kh4 Ra3+=) 63...Kf4 64.Rf7 (64.Rd1?! Nd1 65.Nh5 Kf3 66.Rf6 Ke3 67.Rh6 Nf2 68.Kh4 Kd4+=) 64...Kg5 65.Rf5 1–0. Schulze,Harald (2115) – Eichenseer,Fritz (2085), Landesliga Nord, 1997.

4.c4 c6

5.a4 cb5 6.ab5 Bc5 7.d4 Bd6 8.Nc3 0–0 9.Nf3 a6 10.e4 Be7 11.e5 Ne8 12.Bd3 f6 13.Qc2 g6 14.Bg6 Ng7?? 15.Bh7+– Kh8 16.Nh4 f5 17.Ng6 Kh7 18.Nf8 Qf8 19.g4 Bb7 20.Rg1 ab5 21.Ra8 Ba8 22.Nb5 Be4 23.Qd2 Nc6 24.gf5 Bf5 25.Bc1 Kg8? 26.Nd6 Bd6+= 27.ed6 Qf6 28.d5?? ed5 29.Qd5 Be6 30.Qh5 Qe5?? 31.Qe5+/– Ne5 32.c5?? bc5?? 33.Bb2?? Nd3 34.Kd2 Nb2 35.Kc3 Na4 36.Kd3 Nb6 37.h4 Kf7 38.f4 Nf5 39.Rg5 Nd6 40.f5 Nf5 41.h5 c4 42.Kc3 Ng7 43.Rg1 Nh5 44.Rf1 Nf6 45.Ra1 d5 46.Ra7 Kg6 47.Ra6 Nfd7 48.Kb4 Kf5 49.Ka5 Ke4 50.Kb4 Kd3 51.Ra3 Ke4 52.Rh3?? Bh3–+ (52...Bh3 53.Ka5 c3 54.Ka6 c2 55.Kb5 c1Q 56.Kb4 Qb2 57.Ka5 Nc4 58.Ka4 Nc5) 0–1. iczker – pako1, kurnik, 2011.

5.a4 cb5 6.ab5= d5 7.f3 dc4=+ 8.e4 Nbd7 9.Bc4=+ Nc5 10.Ne2 Nd3 11.Bd3 Qd3 12.0–0 Qd8 13.Qb3 Bc5 14.Kh1 0–0= 15.Qc4 Nd7?? 16.d4+– Be7 17.Qc6 Rb8 18.Ra7 Nf6 19.e5 Bd7?? 20.Qc4 Nd5+= 21.Nbc3 Ne3= 22.Qc7 Nf1 23.Qd7 Qd7 24.Rd7 Bb4 25.Kg1 Ne3 26.Kf2 Nf5 27.g4= Nh6 28.g5 Nf5=+ 29.Na4 Rfd8–/+ 30.Rd8 Rd8 31.Nb6 Bd2 32.Nc4= Bb4 33.b6+= Rb8 34.f4 Ne7 (35.Bc3 Bc3 36.Nc3 Nd5+/–; 34...Kf8 35.Ng3 Ne7 36.Ne4+/–). var – vortex, Caissa.com, 2004.

5.a4 d5 6.Qc2=+.

5.Nf3 a6=.

4.c4 Be7

5.Nc3 0–0 6.d4 a6 7.a4 ab5 8.ab5 Bb7 9.Ra8 Ba8 10.Nf3 Bb4 11.Qa4 Ba5 12.Nd2 c6 13.e3 cb5 14.Qb5 Bc6 15.Qb3 d5 16.Bd3 (better is 16.Ba3!? Re8 17.Bb4=) 16...dc4–/+ 17.Nc4 Bg2 18.Rg1 Bd5 19.Qc2?? (19.Ke2–/+) 19...g6?? (better is 19...Bc4 20.Bc4 Qc7–+) 20.Ne5 (20.Na5!? ba5 21.Ba3=) 20...Nbd7 (20...Nc6 21.Nc6 Bc6 22.h3–/+) 21.f4 Ne5 22.fe5 Nd7 23.Ke2 (23.e4 Bb7 24.Ke2 Qh4–/+) 23...Qh4–/+ 24.Kd1 (24.Nd5 Qh2 (worse is 24...ed5 25.Kd1+=) 25.Kf1 Qh3 26.Qg2 Qg2 27.Rg2 ed5–/+) 24...Bc3 25.Bc3 Ra8 (25...Bf3 26.Kc1 Rc8 27.Rf1–/+) 26.e4 Bc6 27.Bb2?? (better is 27.Qe2 Ra3 28.Kc2–/+) 27...Ba4–+ 28.Qa4 Ra4 29.Bb5 (29.Rg2–+) 29...Ra7 (29...Ra7 30.Rg2 Qe4–+) 0–1. Baer,Cy (1895) – Juha,Michael (1820), RSS7E easy–66, 2007.

5.d4 0–0 6.Nf3 Bb7 7.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.d4).

5.e3 0–0 6.Nf3 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0).

5.Nf3 0–0 6.e3 Bb7 7.Be2 d5 8.0–0 (-->1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.Be2 d5 8.0–0).

5.Nf3 d6 6.g3 Bb7 7.Bg2 a6 8.a4 0–0 9.0–0 ab5 10.ab5 Ra1 11.Ba1 c6 12.Nd4 Nbd7?? (12...Nbd7 13.bc6 Ba8+/–; better is 12...d5=). AbstractPoetic – tche_elvio, internet, 2007.

4.d3 Bb7

5.c4 d5 6.cd5 Nd5 7.Nf3 Nd7 8.e3 (8.e4 N5f6=) 8...N7f6 (8...a6 9.ba6 Ra6 10.Nbd2+=) 9.Be2 (9.e4 Bb4 10.Nbd2 Nf4=) 9...Bb4 (9...a6 10.ba6 Bb4 11.Nbd2 Ra6 12.d4+=) 10.Nfd2 (10.Nbd2 a6 11.Qb3 ab5+=) 10...0–0 (10...a6 11.Qb3+=) 11.0–0 (11.a3 Be7=) 11...c5 (11...a6 12.ba6 Ra6 13.Qc2+=) 12.Nc4 (better is 12.Nb3=) 12...Ne7 (12...a6 13.ba6 Ra6 14.a3=) 13.Qb3 (13.a3 Ba5+/–) 13...Qd5? (better is 13...a6 14.Bf6 gf6 15.ba6 Ra6=) 14.Bf3+– Qd7 15.Bb7 Qb7 16.Rd1 (16.a3!? Ba5 17.Bf6 gf6 18.Rc1+–) 16...Ned5 (16...a6!? 17.Bf6 gf6=) 17.a3+/– Ba5 18.Na5 ba5 19.Nc3 (19.e4 Nf4 20.Bf6 gf6+/–) 19...Rab8 (19...a6 20.Rab1+=) 20.Rab1 a6 21.a4 (21.Nd5 Nd5 22.e4 Nc7+/–) 21...Ng4 (21...ab5!? 22.Nd5 Nd5+=) 22.Nd5+/– ed5 23.Qc3 Qe7?? (better is 23...f6 24.Qc5 ab5+/–) 24.Qg7 1–0. Fredek (2090) – Guest, Freundschaftspartie, 5m + 0s, 2005.

5.Nf3 c5 6.e4 d6 7.Be2 Nbd7 8.0–0 Be7 9.c4 e5 10.Nbd2 0–0 11.a4 Ne8 (11...Bc8 12.Qb3=) 12.g4 (12.a5 a6=) 12...a5 (12...Nc7 13.Qc2+=) 13.Kh1 (13.Ne1 Qc7=) 13...g6 (13...Nc7 14.Bc1+=) 14.Rg1 Ng7 15.Nf1 Ne6 16.Bc1 Nd4 (16...Qc7 17.Ng3=) 17.Bh6 Re8 18.Ne3 (18.Nd4 ed4 19.g5 Bf8=) 18...Nf3+= 19.Bf3 Bg5 20.Bg5 Qg5 21.Qe2 Kh8 22.Rg2 (22.Ng2 Rad8+=) 22...Nf8 (22...h6 23.Re1=) 23.Rag1 (23.Nd5!? Bd5 24.ed5=) 23...Ne6+= 24.Rg3 Nd4 25.Qd1 Re6 26.Bg2 (26.Nf5 Rf6 (26...Nf5?? 27.gf5 Qf6 28.fe6+–; worse is 26...gf5 27.gf5 Qf6 28.fe6+–; 26...Nf3?! 27.Rf3 Rae8 28.Rg2=) 27.h4 Qf4 28.Nd4 cd4+–) 26...Rf6+= 27.Rf1 Re8 (27...Rf4 28.Nc2+=) 28.Nc2 Ne6 (28...Nc2 29.Qc2 Kg8 30.Qe2+=) 29.Ne3 (29.Ne1 h6+=) 29...Rf4 (29...Nf4 30.Kg1+=) 30.f3 (30.Nf5 Ba8+=) 30...Nd4 (30...Kg8 31.Nf5–/+) 31.Nc2 Ne6 32.Qc1 (32.Ne3 Kg8+=) 32...Bc8 (32...Kg7 33.Qe3+=) 33.Kg1 (33.Ne3 Nd4 34.Qd2 Be6–/+) 33...Qh4 34.Rh3 Qg5 35.Rg3 Kg7 36.Rf2 (36.Qe3 Nd4 37.Nd4 cd4+=) 36...f6 (better is 36...Rg4 37.Qg5 A) 37...Ng5?? 38.fg4 (38.Rg4?! Bg4 39.fg4 Ne6+–) 38...Ne6 39.Ne3+–; B) 37...Rg5 38.Rg5 Ng5–/+) 37.Bf1 (37.Qe3 h6+=) 37...Rh8 (37...Rf3 38.Qg5 Rg3 39.hg3 Ng5 40.Ne3–+) 38.Rfg2 (38.Ne3 h5 39.gh5 Qh5 40.Nf5 Rf5 41.ef5 Qf5=) 38...Nf8 (38...Rg4 39.Ne3 Rg3 40.Rg3+=) 39.Be2 (39.Ne3 h5=) 39...Be6 (39...Rg4 40.Qg5 Rg5 41.Rg5 fg5 42.Rg5+=) 40.Kh1 (40.Ne3 h5=) 40...h5 41.gh5 (41.Qe3 hg4 42.fg4 Kf7+=) 41...Qh5–/+ 42.Qg1 g5 (42...Bh3!? 43.Rf2 Nd7–/+) 43.Ne3 (43.Rg5 fg5 44.Rg5 Ng6 45.Rh5 Rh5+=) 43...Rh4 (better is 43...Kh7!?=) 44.f4+/– g4?? (44...Rh2 45.Qh2 Qg6 46.Qh8 Kh8+–) 45.Bg4+– Bg4 46.Rg4 (46.Nf5 Kh7 47.Nh4 Bd7+–) 46...Kf7? (better is 46...Rg4 47.Nf5 Kf7 48.Rg4 Ne6+–) 47.Rh4 Qh4 48.Rg7 Ke8 49.f5 (better is 49.Nf5!? Qf4 50.Nd6 Kd8 51.Nf7 Ke8 52.Nh8 Qf3 53.Rg2 Qd3+–) 49...Qf4 (49...Qh5 50.Rg3 Nd7 51.Rg8 Rg8 52.Qg8 Nf8+/–) 50.Nd5?? (better is 50.Rg3!?+–) 50...Qf3 (50...Rh2 51.Qh2 Qf1 52.Rg1 Qf3 53.Rg2 Qd1 54.Qg1 Qh5 55.Rh2 Qf3 56.Qg2 Qd1 57.Qg1 Qf3 58.Qg2 Qd1 59.Qg1 Qf3=) 51.Qg2 (51.Rg2!?+/–) 51...Qd3 (51...Qd1 52.Qg1 Qf3 53.Rg2+/–) 52.Nf6 (52.Kg1 A) 52...Qc4? A1) 53.Nb6?! Qc1 54.Kf2 Qd2 55.Kf1 Qd1 (55...Rh2 56.Qd2 Rd2 57.Nc4 Rd1 58.Kf2+=) 56.Kf2 Kd8=; A2) 53.Qd2 Qd4 54.Qd4 cd4 55.Re7 Kd8 56.Ra7+/–; B) 52...Kd8+=) 52...Kd8= 53.Rg8 (53.Qf2 Qc4 54.Qd2 Qf1 55.Rg1 Qf3 56.Qg2 Qf4+=) 53...Rg8 54.Qg8 Qf1 55.Qg1 Qf3 (55...Qc4!? 56.h4 Qa4+=) 56.Qg2= Qd1 57.Qg1 Qf3 58.Qg2 Qd1 59.Qg1 Qf3 ½–½. Fredek (2090) – Thefirestorm (2065), Freundschaftspartie, 5m + 0s, 2005.

4.d4 Be7

5.Nc3 a6 6.a4 0–0 7.Nf3 d5 8.e3 a5 9.Bd3 c5 10.dc5 Bc5 11.0–0 Bb7 12.Ne2 Nbd7 13.Ne5 Ne5 14.Be5 Ng4 15.Bc3 Qh4 16.h3 Nf2 17.Rf2 Be3 18.Qf1 Bf2 19.Qf2 Qf2 20.Kf2 Bc8 21.Nd4 e5 22.Nc6= e4 23.Be2 Bd7?? 24.Ne7+/– Kh8 25.Nd5 Rab8 26.Bd4 (26.Bd4 Be6 27.Nb6+–) 1–0. Andy HB – Chairboy, ChessWorld.net, 2005.

5.e3 d5 6.Bd3 0–0 7.Ne2 a6 8.ba6 Ba6=+ 9.Ba6 Na6 10.c3 Nb8 11.0–0 Nbd7 12.h3 c5–/+ 13.dc5 bc5 14.Nd2 Qb6 15.Bc1 Ra6 16.Rb1 Qa7 17.a3 c4 18.Nd4 Ba3 19.Nb5= Qc5 20.Na3 Ra3 21.Ba3 Qa3 22.Rc1 Nc5= 23.Nb1 Qa1 24.f3 Nd3–/+ 25.Rc2 Ra8 26.Nd2 Qa4 27.g4 Qb5 28.Re1? Ne1–+ 29.Qe1 h6 30.e4 Qc5 31.Qf2 Qf2 32.Kf2–/+ de4 33.fe4 Rd8 34.e5 Nd7 35.Nc4=+ Rc8 36.Nd6 Rc5 37.c4 Ne5 38.Ne4? Rc4–+ 39.Ra2?? Re4 40.Ra8 Kh7 41.Ra7 Rf4 42.Ke3 Rf3 43.Ke4 f6 44.h4 Rh3 45.g5 Rh4 46.Ke3 hg5 47.Re7 Rh3 48.Kf2 Nd3 (49.Kg2 g4–+) 0–1. MasterofDisaster – Hamam1, Caissa.com, 2004.

4.e3 c5

5.c4 d5 6.Nf3 Be7 7.Be2 0–0 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0–0 7.Be2 b6).

5.c4 d5 6.Nf3 Be7 7.Be2 0–0 8.0–0 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5).

5.Nf3 Bb7 (--> 4.e3 Bb7 5.Nf3 c5).

5.Nf3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 b6).

5.f4 Bb7 6.Nf3 h5 (6...Be7 7.Be2=) 7.Be2+= d6 (7...Be7 8.0–0+=) 8.0–0 Nbd7 (8...Be7 9.Nc3+=) 9.a4 (9.Nc3 Be7+=) 9...Qc7 (9...Be7 10.a5+=) 10.c4 (10.Nc3 h4+=) 10...Be7 11.Ng5 g6 (11...h4 12.Nc3+=) 12.Na3 Rf8 (12...0–0 13.Bf3+=) 13.Nc2 (13.Bf3 Bf3 14.Qf3 d5+=) 13...d5 14.a5 Ne4 (better is 14...ba5!? 15.Bc3 Nb6+=) 15.Ne4 (15.a6 Bc8 16.Nh7 Rg8+/–) 15...de4+– 16.a6 Bc8 17.d3 f5 (17...Bf6 18.Ra2+/–) 18.de4 fe4 19.Bh5 (better is 19.Bg7!? Rf7 20.Bh8+/–) 19...gh5= 20.Qh5 Rf7 21.Rad1 (21.Qg6 Nf6+/–) 21...Bd6 (better is 21...Nf6!? 22.Qg6 Bd7+/–) 22.Qg6+/– White gets the initiative 22...Ke7 23.Qe4 (23.Rf2 Rb8+/–) 23...Rb8 24.Rf2 Nf6 25.Qg6 Ne8 (25...Nd7 26.Rfd2 Bf4 27.ef4 Qf4 28.Re2 Qc4 29.Re4 Qe4 30.Qe4+–) 26.Ne1 (26.Rfd2 Bf4 27.ef4 Qf4+–) 26...Kf8 (26...Ra8+–) 27.Qh6 Ke7 28.Nf3 Bd7 29.Rfd2 (29.Rfd2 Rd8 30.Nh4 Bb5 31.Ng6 Kd7 32.Ne5 Kc8 33.Qe6 Bd7 34.Qf7+– (34.Rd6 Be6 35.Rd8 Qd8 36.Rd8 Kd8–/+)) 1–0. Kucharkowski,Jens – Bruhn,Torsten, corr, 1983.

5.f4 Be7 6.Nf3 Bb7 (6...a6 7.Be2=) 7.Be2 a6 (7...0–0 8.0–0=) 8.a4 (8.Na3 0–0=) 8...ab5 9.ab5 Ra1 10.Ba1 0–0 11.0–0 d6 (11...d5 12.Qe1=) 12.Qe1 Nbd7 13.Qh4 (13.Qg3 Qc7=) 13...Ne4 (13...Qc7 14.Nc3=) 14.Qh3 (14.Qe1 Qa8 15.Nc3 Nc3 16.Bc3 Qa4=) 14...Qa8 (14...Bf6 15.Bf6 Qf6 16.d3+=) 15.Nc3 Ndf6 (15...Bf6 16.Ne4 Be4 17.Bf6 Nf6 18.d3=) 16.Bd3 h6 (16...d5 17.Be2=) 17.Bb2 Qc8 (17...Nc3 18.Bc3 (worse is 18.dc3 Qa2 19.Ba1 c4–+) 18...Be4 19.g4 Bd3 20.cd3+=) 18.Na4 (18.Ne4 Ne4 19.Be4 Be4+=) 18...Qc7= 19.c4 Nd7 (19...d5 20.Be5 Qd8 21.Ra1=) 20.f5 (20.Bc2 d5 21.d3 Nef6=) 20...e5 21.Bc2 (21.Be4 Be4 22.Nc3 Bb7=) 21...Ng5 (21...Ra8 22.d3 Nef6 23.Qg3=) 22.Ng5 White fights for the Initiative 22...Bg5 23.Nc3 Nf6 (23...Ra8 24.Be4=) 24.Qg3+= Nh5 25.Qf2 Qe7? (25...Be7!?+=) 26.g3 (26.Bd1 g6 27.Bh5 gh5+–) 26...e4 (26...g6 27.fg6 fg6 28.Qf8 Qf8 29.Rf8 Kf8 30.Bg6+–) 27.Bd1+– Nf6 (27...g6 28.Bh5 gh5 29.f6+–) 28.h4 Nh7 (28...Bh4 29.gh4 Kh7 30.Qg2+–) 29.hg5 Ng5 (29...Qg5 30.Na4+–) 30.Kh2 (30.f6!? Qe6 31.Qh2 Rd8+–) 30...f6 (30...Ra8 31.Na4 Qd8 32.f6+–) 31.Be2 Qf7 32.Qf4 Rd8 33.Ra1 Nf3 34.Bf3 ef3 35.g4 h5 (35...d5 36.Na4+–) 36.gh5 Qh5 37.Kg3 g5 (37...d5 38.Ra7 dc4 39.Ne4 (39.Rb7 Rd2 40.Rg7 Kg7 41.Qc7 Kh6 42.Qf4 Qg5 43.Qg5 fg5–+) 39...Be4 40.Qe4 Qg5 41.Kf3 Rd2 42.Qc4 Kh7 43.Bf6 Qf6 44.Qf7=) 38.fg6 (better is 38.Qg4 Qg4 39.Kg4+–) 38...Rd7 (38...Qg6 39.Qg4 Qg4 40.Kg4 f5 41.Kg3 d5 42.cd5 Bd5 43.Nd5 Rd5+–) 39.Qf6 Qe5 40.Qe5 de5 41.Rd1 (41.Ra7 Kg7 42.Na4 Kg6 43.Be5 f2 44.Kf2 Rd2 45.Kg3 Rg2 46.Kh3 Ra2+–) 41...e4 (41...Rd6 42.e4 Rg6 43.Kf3 Rf6 44.Ke3+–) 42.Nd5! Bd5 (42...Rd5 43.cd5) 43.Rh1 Kf8 44.g7 Kf7 45.Rh8 (45.Rh8 Kg6 46.cd5 Rg7 47.Bg7 Kg7 48.d6 Kh8 49.d7+–) 1–0. Lipok,Erik – Kreilinger,Erich, NB op Germany, 1992.

4.e3 c6

5.a4 Bb7 6.Nf3 cb5 7.ab5 d5 8.c4 Bb4 9.Nc3 0–0 10.Qb3 Bc5 11.d4 Be7 12.Ne5 Nbd7 (better is 12...dc4!? 13.Nc4 Re8=) 13.Nc6+/– Bc6 14.bc6 Nb8 15.cd5 ed5 16.Rc1 (better is 16.Bb5!?+=) 16...Nc6+= 17.Nd5 Na5 (17...Nd5!? 18.Rc6 Bb4 19.Kd1 Qd7+=) 18.Ne7 Qe7 19.Qb5 Rac8 20.Bd3 Rc1 21.Bc1 Rc8 22.0–0 Ng4?? (better is 22...Qd7+=) 23.Qf5+– Nf6 24.Qc8 Ne8 1–0. forsetinn (1740) – bernardhgaskin, gameknot.com, 2013.

5.a4 Be7 6.Nf3 0–0 7.Be2 a6 8.c4 cb5 9.ab5 Bb7 10.Nc3 ab5 11.Ra8 Ba8 12.cb5 Nd5 13.Qa1 Bf6?? (better is 13...Nc3 14.Bc3 Bf3 15.Bf3 f6+=) 14.Qa8+– Nc3 15.Bc3 Bc3 16.dc3 d6 (16...Qf6 17.Qa3+–) 17.0–0 Nd7 18.Qd8 Rd8 19.Nd4 (19.Ra1 Rc8+–) 19...Rc8 (19...Ra8 20.Nc6 Nc5 21.Bf3+–) 20.Nc6 Kf8 21.Ra1 g6 22.c4 Nc5 23.h3 f5 (23...h5 24.Bf3+–) 24.Ra7 Ne4 (24...h6 25.Ne7 Rd8 26.Ng6 Kg8 27.Ne7 Kf8 28.g4 fg4 29.Bg4+–) 25.Rh7 Kg8 26.Ne7 Kh7 27.Nc8 d5 (27...Nc3 28.Bd3 Na4 29.Bc2+–) 28.Nb6 dc4 29.Nc4 Nc5 30.b6 g5 31.Bf3 g4 (31...Kg7 32.b7 Nb7 33.Bb7+–) 32.b7 Nb7 33.Bb7 gh3 34.gh3 Kh6 (34...Kg6 35.Ne5 Kg7 36.f4+–) 35.Bc8 f4 36.ef4 e5 (36...Kg7+–) 37.fe5 Kg6 38.f4 Kf7 39.f5 Ke7 40.f6 Kf7 41.h4 (41.Bf5 Ke8 42.e6 Kd8 43.e7 Kc7 44.e8Q Kb7 45.Qb5 Ka7 46.Qb6 Ka8 47.Be4) 41...Kg6+– 42.Nd6 Kh5 (42...Kh7 43.Bf5 Kh6 44.Ne4 Kh5 45.f7 Kh4 46.f8Q Kh5 47.Qh8) 43.e6 (43.f7 Kg6 44.f8Q Kh5 45.Qh8 Kg6 46.Bf5) 43...Kh4 44.e7 Kg5 45.f7 (45.f7 Kg6 46.f8Q Kh5 47.e8Q Kg5 48.Qfe7 Kf4 49.Qe3) 1–0. GuestTVKZ – GuestXQYM, freechess.org, 2017.

4.e3 d5

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6).

5.Be2 Bb7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.Be2).

5.Nf3 Bb7 6.Be2 Be7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 d5).

5.Nf3 c5 6.c4 Bb7 7.Be2 Be7 8.0–0 0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5).

5.Nf3 Bd6 6.c4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0–0 6.c4 b6).

5.Nf3 Be7 6.Be2 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 d5).

4.e3 g6??

5.Nf3 Bg7 6.Ne5 Bb7 7.Qe2 0–0 8.Rg1 d6 9.Ng6?? hg6 10.f3 c6 11.e4 cb5 12.Qb5 Nc6 13.Nc3 Nd4 14.Qa4 Nc6?? 15.e5?? Ne5–+ 16.Ne4 Ne4 17.fe4 Qh4 18.Kd1 Qe4 19.Bd3 Qa4 20.h4 Nd3 (20...Nd3 21.Bd4 Qd4 22.cd3 Qg1 23.Ke2 Qg2 24.Kd1 Rac8 25.Ke1 Ba1 26.h5 Rc1) 0–1. steelkingdom – kinghenry3, Live Game Caissa's Web, 2004.

5.Nf3 Bh6 6.c4 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 d6 10.Nc3 Bb7 11.Be2 Bg7 12.0–0 h6 13.d4 0–0 14.Bb2 d5 15.Qb3 dc4 white timed out 0–1. chessxliv (2100) – beammeupscotty (2115), net–chess.com, 2014.

4.Nf3 c5

5.d4 Bb7 6.e3 cd4 7.ed4 Be7 8.Be2 0–0 9.0–0 a6 10.c4 ab5 11.cb5 d5 12.Ne5 Nbd7 13.Nd7 Qd7 14.a4 Rfc8 15.Nc3 Bb4 16.Na2 Bd6 17.g3 Rc7 18.Bd3 Rac8 19.Rc1 Qe7 20.Nc3 Bb4 21.Na2 Rc1 22.Bc1 Bd6 23.Bg5 h6 24.Bf6 Qf6 (worse is 24...gf6 25.Qg4 Kh8 26.Re1=) 25.Nc1 Kh8 26.Ne2 e5 27.de5 Be5 28.f4 Bd6 29.g4 (29.h3!?–/+) 29...Bc5 Black prepares the advance d4 30.Kg2 d4 (30...Be3 31.Kg3–/+) 31.Kg1 Qe6 32.Bf5?? (better is 32.Ng3–/+) 32...Qe3 (32...d3 33.Rf2 Qe3 34.Nd4 Bd4 35.Be4 Qf2 36.Kh1 Be4 37.Qf3 Qf3) 33.Rf2 0–1. Szkodnikow_i_ofiar – Hovla1, ChessWorld.net, 2015.

5.d4 Qc7 6.e3 Bb7 7.Be2 d5 8.c4 dc4 9.0–0 Nbd7 10.Nbd2 Rd8 (10...cd4 11.Bd4 e5 12.Bb2+=) 11.Qa4 (better is 11.Rc1!?+=) 11...cd4+= 12.ed4 c3 13.Rac1 Nd5 14.Ne4 Nf4 (14...Bb4!?–/+) 15.Nc3+= Ne2 16.Ne2 Qb8 17.Rc3 Bd6 18.Ng3 0–0 19.Ng5 Nf6 20.d5 h6 21.Nf7 Rf7 22.de6 Re7 23.Nf5? (23.Re3 Nd5 24.Ree1 Nf4–+) 23...Re6 (better is 23...Bh2 24.Kh1 Re6 25.Re3 Re3 26.Ne3–+) 24.Nh6?? (24.Nd6 Rdd6 25.Ra3–+) 24...gh6 25.Qh4 Bf4 26.Rg3 (26.Ra3 Bg5 27.Qh3 Rde8–+) 26...Kf7 (26...Bg3!? 27.hg3 Ne4 28.Bc1–+) 27.Qh3 Rd2 28.Bc1 Bg3 29.Bd2 Bf4 (29...Bf4 30.Bf4 Qf4–+) 0–1. Bjelstrand,Kim – Rej,Dennis, DEN–chJ int Ribe, 1978. (=1.Nf3 b6 2.b4 e6 3.Bb2 Nf6 4.b5 c5)

5.e3 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5).

5.e3 d5=.

5.g3 Bb7 6.Bg2 d6 7.d3 Be7 8.0–0 0–0 9.e4 Nbd7 10.Qe2 Rc8 (10...a6 11.ba6 Ra6 12.c4+=) 11.Nbd2 Qc7 12.Rfe1 Rfd8 13.Nc4 d5 14.ed5 Bd5 15.Ng5 Bg2 16.Kg2 h6? (better is 16...Qb7 17.f3 Nd5+=) 17.Nf7!+– Re8 (17...Kf7 Decoy to f7 18.Qe6) 18.Qe6 Bf8 19.Nh6 Kh7 20.Qf7?? (better is 20.Qf5 g6 21.Qf3 Bh6 22.Bf6 Nf6 23.Qf6+–) 20...Kh6 (better is 20...Re1!? 21.Re1 Kh6+/–) 21.Re8+– Ne8 22.Qf5 Nef6 (22...Be7 23.Qh3 Kg6 24.Qd7 Qd7 25.Ne5 Kf5 26.Nd7+–) 23.Bc1 (23.Ne5 Qb7 24.f3 Ne5 25.Bc1 g5 26.Bg5 Kg7 27.Bf6 Kg8 28.Qe5 Kf7+–) 23...g5 24.h4 (24.Bg5 Kg7 25.Bf6 Nf6+–) 24...Qb7 (24...Kg7 25.hg5 Re8+–) 25.f3 Kg7 26.hg5 (26.Qg5?! Kf7 27.h5 Qd5 28.Qg6 Ke7+–; 26.Bg5?! Nd5+–). Woelfelschneider,Peter – Mayer, 2010.

4.Nf3 d5

5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3).

5.e3 Bb7 6.Be2 Nbd7 7.c4 c5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5 7.Be2 Nbd7).

5.e3 c5 6.Be2 Be7 7.0–0 0–0 8.d3 Bb7 9.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.d3).

4.Nf3 Be7

5.c4 0–0 6.g3 Bb7 7.Bg2 c5 8.0–0 d5 9.d3 d4 10.Nbd2 Nbd7. algernon (2400) – kostaspetidis (2320), net–chess.com, 2003.

5.e3 Bb7 6.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4).

5.e3 Bb7 6.Be2 0–0 7.0–0 d5 8.c4 c5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5).

5.e3 d5 6.c4 dc4 7.Bc4 c5 8.bc6 (8.Nc3 Nbd7+=) 8...Nc6= 9.Bb5 Bd7 10.0–0 0–0 11.Nc3 a6 12.Ba4 b5 13.Bb3 Qb6 14.d4 Rac8 15.Rc1 Rfd8 16.d5 (16.Qd3 Qb7=) 16...ed5 (better is 16...Na5!?–/+) 17.Nd5= Nd5 18.Bd5 (18.Qd5 Be6 19.Qh5 Bb3 20.ab3 g6=) 18...Bg4 19.Qb3 (better is 19.h3 Bf5 20.Qe2=) 19...Rf8?? (19...Na5!? 20.Qd3 Bf3 21.Rc8 Rc8 (21...Bd5? 22.Rd8 Qd8 23.Rd1+–) 22.gf3 Rd8=) 20.h3 (better is 20.Rc6 Rc6 21.Ne5+–) 20...Na5= 21.Qd1 Bh5 (21...Be6 22.Rc8 Rc8 23.e4=) 22.Bd4 (22.g4!? Bg6 23.Ne5 Rc1 24.Qc1+/– (24.Bc1?! Rc8=)) 22...Qd6= 23.Rc8 Rc8 24.Be4 Qe6 25.Bd3 (25.Qb1 Bg6 26.Bg6 Qg6=) 25...Qa2 26.Qa1 Qa1 27.Ra1 (worse is 27.Ba1 Bg6 28.e4 Nc6–+) 27...Nb3 28.Ra6 Bf3 29.gf3 Nd4 30.ed4 Rb8 31.d5 g6 32.d6 Bd8 33.Bb5 Kg7 (33...Rb5 34.Ra8 Combination) 34.Bc6 Kf6 35.d7 Ke7 36.Ba4 h5 37.Kg2 h4 38.f4 Rb4 39.Kf3 Bc7 40.Ra8 Bd8 41.Kg4 f6 42.Kf3 f5 43.Ra6 Bc7 44.Ra8 Bd8 45.Ra6 Kf7 46.Ra8 Bc7 (46...Ke7 47.Bc6=) 47.Bc6+= Rb3 (47...Ke7!?+=) 48.Kg2 Rd3 49.Re8 Rd6 50.Bb5 Rd4 51.Bc6 Rd2 (51...Rd6 52.Rc8 Bb6 53.Kf1+=) 52.Kf3 (52.Kf1!?+/–) 52...Bb6= 53.Re2 Rd3 54.Kg2 Rd6 55.Bb5 (55.Ba4 Rd4 56.Bb3 Kg7 57.Re7 Kh6=) 55...Bc7 56.Bc4 (56.Rc2 Bd8=) 56...Kf6= 57.Re8 Rd7 58.Rh8 Bf4 59.Rh4 g5 60.Rh6 Ke5 61.Re6 Kd4 62.Bb3 Bd2 63.Bc2 Rd5 64.Rf6 f4 65.Rf5 Rd8 66.Kf3 (66.Rg5?? f3 67.Kg3 Bg5–+) 66...Kc3 67.Ba4 Rd3 68.Kg4 Be1 69.f3 Bh4 70.Bc6 Rd2 71.Re5 Rg2 72.Kh5 Rg3 73.Rc5 Kd4 74.Rd5 Ke3 75.Re5 Kf2 Exerts pressure on the isolated pawn 76.Rc5 Kg2 77.Rc2 Kh3? (better is 77...Kh1=) 78.Bd7+– Rg4?? (better is 78...g4 79.Bg4 Rg4 80.fg4 Bf6+/–) 79.Bg4 Kg3 80.Rc5 Kf2 81.Rg5 Bg3 (81...Kg3 82.Kg6 Kf2+–) 82.Re5 Kf1 83.Kg5 Kg2 (83...Kf2 84.Re4+–) 84.Re4 Kf2 (84...Kh2 85.Rf4 Kg2 86.Re4+–) 85.Rf4 Ke3 86.Re4 Kd3 87.Re8 Kd4 1–0. Purczynski,Andrzej – Adamczyk,Wieslaw, Poznan POL, 2014. (=1.Nf3 Nf6 2.b4 e6 3.b5 b6 4.Bb2 Be7)

5.e4 Ne4 6.Bg7 Rg8 7.Bb2 Bb7 8.d3 Bf6 9.Bf6 (9.de4? Bb2 10.Nbd2 Ba1 11.Qa1 a6–+) 9...Qf6 10.Nbd2 (better is 10.d4!?+=) 10...Nc3–+ 11.Qc1 Nb5 12.Ne4 Qg7 13.Rb1 Nc3 14.Nc3 Qc3 15.Qd2 Qf6 16.Qe3 Nc6 17.c4 0–0–0 18.c5 Qc3 19.Nd2 Nb4 (19...Nb4 20.Qe2 Bg2 (worse is 20...bc5 21.f3–+) 21.Bg2 Rg2 22.Rb4 Qc1 23.Qd1 Qc5=) 0–1. Kappel,Ray – Kudryavtsev,Yaroslav (2100), 37. LSS No Engine Cup Preliminary, 2011.

4.f4 a6=+

5.a4 ab5 6.ab5 Bb7 7.Ra8 Ba8 8.Nf3 d5 9.d3 Nbd7 10.e3 Bb4 11.c3 Bc5 12.d4 Be7 13.Nbd2 0–0 14.Bd3 c6 15.0–0 cb5 16.Bb5 Qc7 17.Qb3 Ne4 18.Ne4 de4 19.Ne5 Bb7?? 20.Nd7 Bd5 21.Qa4 Rd8 22.Ne5 f6 23.Nc6 Bc6 24.Bc6 Rd6 25.Be4 f5 26.Bf3 Rc6 27.Ra1 Rd6 28.Qa8 Rd8 29.Qc6 Qc8 30.Qc8 Rc8 31.Ra8 Ra8 32.Ba8 Kf7 33.c4 g6 34.e4 Ke8 35.ef5 ef5 36.d5 Kd7 37.Be5 Bc5 38.Kf1 h6 39.Bc6 Ke7 40.Bg7 g5 41.Bh6 gf4 42.Bf4 Kf6 43.h4 Ke7 44.h5 Kf7 45.h6 Kg6 46.g3 Kh7 47.d6 Kg6 48.d7 Be7 49.Bc7 Kh6 (50.Bb6 Kg7+–). var – book1, Caissa.com, 2004.

5.a4 Bb7 6.e3 c5 (6...Be7 7.Nf3+=) 7.c4 (7.Nf3 Be7=) 7...d5 (7...Be7 8.Nf3+=) 8.Nf3 Bd6 9.Nc3 (9.ba6 Ba6 10.cd5 Bf1 11.Rf1 Nd5+= (worse is 11...ed5 12.Bf6 Qf6 13.Nc3=)) 9...0–0 10.d3 (10.ba6 Na6 (worse is 10...Ra6 11.cd5 Ra5 12.de6+/–) 11.cd5 Nd5+=) 10...d4–/+ Black terminates the opponent with strong threats 11.ed4 cd4 12.Ne2 (12.Nd4 Bf4 13.Nf3 Ng4–/+) 12...Bf3 13.gf3 Nh5 14.Bd4 Nf4 (14...Bf4?! 15.a5 ba5 16.b6+=) 15.Rg1 (better is 15.Kd2–/+) 15...Bb4–+ 16.Kf2 Ne2 17.Bg7 (17.Rg7 Kh8 18.Be5–+) 17...Ng1 18.Bf8 (18.Bb2 Qg5 19.Bg2 Bc5 20.d4 Rd8–+) 18...Qd4 19.Kg3 (19.Kg2 Bf8 20.Kh1 ab5 21.cb5 Bc5–+) 19...Bf8 20.Bg2 (20.Kg2–+) 20...Bd6 (20...Bd6 21.f4 Qf4) 0–1. Rush,Bradley – Ralls,Richard Nelson (2025), IECG, 1996.

5.e3 Bb7=+.

4.g3 Bb7

5.f3 Bc5+=.

5.Nf3 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 d6 (8...Bf3 9.ef3 A) 9...d5 10.Qe2 (10.Bg2 Be7 11.0–0 0–0 12.Re1=; 10.Bd3 Bc5 11.0–0 Nbd7 12.Re1+=; 10.Nc3 Bc5 11.Bd3 0–0 12.0–0+=; 10.Be2+= Bd6 11.0–0 0–0 12.Re1+=) 10...Bd6 11.Bg2 Nbd7 12.0–0=; B) 9...Bb4 10.Bg2 (10.Be2 0–0 11.c3 Be7 12.0–0+=; 10.Bd3 c5 11.c3 Ba5 12.c4=; 10.Nc3 0–0 11.Bg2 d5 12.0–0+=; 10.Be5 0–0 11.Bg2 d6 12.Bb2=) 10...d6 11.0–0 0–0 12.Re1=; C) 9...Be7 10.Bg2 (10.Be2 0–0 11.0–0 d5 12.Bb2+=; 10.Nc3 0–0 11.Bg2 d5 12.0–0+=; 10.Bd3 0–0 11.Nc3 c5 12.bc6+=) 10...0–0 11.0–0 d5 12.Re1=; D) 9...c5 10.Qe2 Be7 11.Bg2 Qc8 12.f4=; E) 9...Bc5 10.Bg2 (10.d4 Bb4 11.Bc3 Bc3 12.Nc3+=; 10.Be2 0–0 11.0–0 c6 12.Re1+=; 10.Bd3 0–0 11.0–0 c6 12.Re1=; 10.Bc3 d5 11.d4 Be7 12.Bd3+=) 10...0–0 11.0–0 d5 12.Qe2=) 9.Bg2= Nbd7 (9...Be7 10.0–0= (10.c4 0–0 11.0–0 d5 12.Ne5=) 10...0–0 11.c4 d5 12.Ne5=; 9...c6 10.Nc3 (10.bc6 Nc6 11.0–0 d5 12.Nc3=; 10.Nd4 d5 11.0–0 c5 12.Nf3=; 10.c4 cb5 11.cb5 Be7 12.0–0=) 10...Be7 11.0–0 d5 12.Re1=; 9...d5 10.Bb2 (10.Ne5 c6 11.0–0 cb5 12.e3+=; 10.0–0 Bd6 11.Be5 0–0 12.Bd6=; 10.h3 Be7 11.0–0 0–0 12.Nd4=; 10.Be5 c5 11.0–0 Nbd7 12.Bb2=) 10...c6 11.c4 cb5 12.cb5=; 9...e5 10.0–0 (10.c4 Be7 11.0–0 c6 12.Nc3=) 10...Be7 11.c4 0–0 12.Nc3=) 10.0–0 (10.c4 Ne5 11.Qb3 Nfd7 12.Bd4=; 10.d4 Be7 11.Bb2 0–0 12.0–0=; 10.d3 d5 11.0–0 Bd6 12.c4=; 10.Nc3 Ne5 11.0–0 Nf3 12.ef3=) 10...Be7 11.c4 0–0 12.Nc3 (12.d3 d5=; 12.Qc2=) 12...e5 (12...c5 13.bc6 Bc6 14.d3=) 13.d3 (13.d4 ed4 14.Qd4 Nc5+=) 13...Nc5 14.d4 (14.e3 Qa8 15.d4 Ncd7=) 14...ed4+= 15.Nd4 Nce4 (15...Qd7 16.Bb7 Nb7 17.Nd5 Nd5 18.cd5+=) 16.Ne4 (16.Qc2 Nc5+=) 16...Ne4+= 17.Qc2 Qa8 (17...Nc5 18.Nc6 Bc6 19.Bc6+/–) 18.Bb2+/– f5 19.Nf5 (19.f3 Nc5 20.Nf5 Bf6 21.Bf6 Rf6+/–) 19...Rf5+= 20.Ra1 Qf8 21.Be4 Be4 22.Qe4 Qf7 (22...Rf2 23.Bd4 Rf7 24.Ra8+/–) 23.f3 (23.Bd4 Bf8 24.Qc6 d5+–) 23...Rc5 24.Ra4 h6 (24...Bf8 25.Ba3 Rh5 26.Ra7+/–) 25.Qd3 (25.Ba3 Rf5+–) 25...Qe6 (25...Rf5 26.Bd4 Bf8 27.g4+–) 26.e4 (26.Bd4 Rf5+–) 26...Bf6 (26...Rh5 27.f4 Qh3 28.Qe2+–) 27.e5! de5 (27...de5 28.Ba3; 27...Be5 28.Ba3) 28.Qg6 Qd7 29.Ra8 Bd8 30.Bc3 (30.Qe4 Kf7 31.Ba3 Be7+–) 30...c6 31.Bb4 1–0. Baeckstroem,Mikael (2295) – Giache,Gianluca, corr ICCF WSTT/3/06/1, 2006.

5.Nf3 a6 6.ba6 Na6 7.Bg2+=.

5.Nf3 Be7 6.Bg2= 0–0 7.0–0 a6 8.c4=.

5.Nf3 Be7 6.Bg2= 0–0 7.0–0 c6 8.a4 a6=.

5.Nf3 Be7 6.Bg2= 0–0 7.0–0 c6 8.c4 d5 9.d3 (9.cd5 Nd5 10.e4 Nb4+=) 9...Nbd7 (9...cb5 10.cb5 a6 11.Nc3+=) 10.Nbd2 (10.bc6 Bc6 11.Nd4 Bb7=) 10...Qc7 (10...cb5 11.cb5 a6 12.a4+=) 11.a4 (11.cd5 ed5 12.bc6 Qc6+=) 11...Rac8 (11...a6 12.bc6 Bc6 13.Nd4=) 12.Ra2 (12.Qc2 e5=) 12...a5 (12...e5 13.e3+=) 13.Qa1 (13.ba6 Ba6 14.a5 ba5=) 13...cb5 (13...dc4 14.Nc4 Rfe8 15.Nd4=) 14.cb5 (14.ab5 dc4 15.Nc4 Nc5=) 14...Ne8 (14...Rfd8 15.Nb3=) 15.Ne5 (15.Rc1 Qb8=) 15...Ne5 16.Be5 Qd7 (16...Bd6 17.Bb2=) 17.Nf3 (17.Bd4 Bf6=) 17...Bf6 (17...f6 18.Bd4 Qd6 19.Bb2=) 18.Rc1 Rc1 19.Qc1 Be5 (19...d4 20.Qf4=) 20.Ne5+= Qd6 21.Nc6 (21.d4 f6 22.Nd3 Rf7+=) 21...Nf6 (21...Bc6 22.Qc6 Qb4 23.Ra1=) ½–½. Jamieson,Ian (2060) – McGowan,Daniel (2090), ch–SCO Oban, 2005.

5.Nf3 Be7 6.Bg2 0–0 7.0–0 c6 (7...a6 8.ba6 Na6 9.c4+=) 8.Nh4 (8.c4 d5+=) 8...Ne8 (8...d5 9.a4+=) 9.bc6 Bc6 (9...Nc6 10.Nf3+=) 10.Bc6 (10.Nf3 d5+=) 10...dc6 11.Ng2 (11.Nf3 Bf6 12.Nc3 Nd6+=) 11...Nc7 (11...Bf6 12.Bf6 Nf6 13.Nc3+=) 12.e4 c5 (12...Bf6 13.e5 Be7 14.Qf3+=) 13.d4 (13.Qg4 Bf6 14.e5 Be7+=) 13...Nd7 (13...Nc6 14.dc5 Bc5 15.Nf4+=) 14.a4 (14.dc5 Bc5 15.Qg4 Ne8+=) 14...Nf6 (14...cd4 15.Bd4 Nc5 16.Nc3+=) 15.Re1 (15.Qd3 cd4 16.Bd4 Qc8+=) 15...cd4 16.e5 (16.Bd4 Qc8+=) 16...Nfd5 17.Qg4 (better is 17.Bd4 f6 18.Qg4+=) 17...Nb4–+ 18.Re2 Bc5 (18...Nc6 19.Nd2 Qd7 20.Rd1–+) 19.Bc1 (better is 19.a5–+) 19...Qd5 (better is 19...f6–+) 20.Bh6+= The mate threat is Qxg7 20...Ne8 21.h4?? (better is 21.Nf4!? f5 22.ef6=) 21...Nc2?? (better is 21...d3 22.cd3 Nd3–+) 22.Rc2+= d3 23.Rd2 Qe5 24.Raa2 f5 25.Bf4 Qd5 (25...fg4 26.Be5 Rf5 27.Bc3=) 26.Qd1 Rd8 (26...e5!? 27.Nc3 Qe6+=) 27.Bg5+= Rd7 28.Nf4 (28.Ne1 Qc4 29.Rab2 h6+/–) 28...Qc4 29.a5 b5 (29...Bb4 30.Na3 Ba3 31.Ra3+/–) 30.Na3+= (worse is 30.Rd3 Qa2 31.Rd7 Qf2 32.Kh1 Qg3–/+) 30...Ba3 31.Ra3 h6 32.Ng6 hg5 33.Nf8 (33.hg5 Qb4 34.Rad3 Rd3 35.Rd3 Kf7 36.Nf8 Kf8+–) 33...Kf8 34.hg5 Qb4 (34...Nc7 35.Rad3 Rd3 36.Rd3+=) 35.Rad3 Rd3 36.Rd3 Qa5 37.Rd7 g6?? (better is 37...e5+–) 38.Qd4 Qe1 (38...Kg8 39.Rd8 Qd8 40.Qd8 Kf8+–) 39.Kh2 e5 40.Qa7 (40.Qc5 Kg8 41.Rd8 Qf1 42.Re8 Kf7 43.Qe7) 40...f4 1–0. Wall,Bill – Pennell,Gary, Taylorsville, NC, 1975.

5.Nf3 Be7 6.Bg2= a6 7.ba6 Na6 8.0–0+=.

5.Nf3 g6 6.Nc3 Bg7 7.Bg2 Nh5 8.e3 0–0 9.a4 a6 10.0–0 a5 11.Re1 d5 12.d4 Nd7 13.e4 de4 14.Ne4 Ndf6 15.Ned2 Nd5 16.Ne5 Be5 17.de5 c6 18.Ne4 cb5 19.Nd6 Qc7 20.Nb5 Qc5? (better is 20...Qb8+/–) 21.Ba3+– Qc4 22.Bf8 Rf8 23.Nd6 Qc7 24.Nb7 Qb7 25.c4 Nc3 26.Bb7 Nd1 1–0. usingprogram (2030) – trifioan, kurnik, 2012.

4.a4 Bb7

5.c4 Bb4 6.Qb3 a5 7.Bc3 Qe7 8.f3 d5 9.e3 Nbd7 10.d4 c5 11.Bb4 cb4 12.Bd3 g6 13.Ne2 Nh5 14.0–0 Qg5 15.f4 Qg4 16.Nd2?? dc4–+ 17.Be4 cb3 18.Bb7 Qe2 19.Rf2 Qe3 20.Ba8 Nf4 21.Nb3 Qb3 22.Rf4 Qe3 23.Rf2 Qd4 24.Rc1 0–0 25.Bc6 Ne5 26.Kf1 Nd3 27.Rd2 Qf4 28.Rf2 Qc1 29.Ke2 Nf2 30.Kf2 b3 31.Be4 f5 32.Bf5 Rf5 33.Kg3 Rh5 34.h4 b2 35.Kh3 b1Q 36.g4 Re5 37.g5 Qa1 38.h5 gh5 39.g6 hg6 40.Kh4 Qh1 41.Kg3 Qa4 42.Kf2 Qb5 43.Kg3 Qe8 44.Kf4 Rf5 45.Kg3 Rg5 46.Kf4 Qg1 47.Kf3 Rf5 48.Ke4 Qe1 49.Kd4 Qd8 50.Kc4 Qc1 51.Kb3 Qd4 52.Ka2 Qda1 53.Kb3 Qd4 54.Ka2 Qda1 55.Kb3 Qd4 56.Ka2 Qda1 57.Kb3 (57.Kb3 Rf3#) 0–1. Andreas – alias@, mySchach.de, 2004.

5.Nf3 d5 6.e3 Be7 7.d4 c5 8.dc5 bc5 9.Be2 a6 10.0–0 c4 11.Nc3 0–0 12.e4 ab5 13.ab5 Ra1 14.Ba1 Qb6 15.ed5 ed5 16.Qd4 Bc5 17.Qf4 Nbd7 18.Na4 Qb5 19.Nc5 Qc5 20.Bd4 Qc6 21.Re1 Re8 22.Qg3 h6 23.h3 Qa4 24.c3 Qc2 25.Bf1 Re1 26.Ne1 Qe4 27.Nf3 Ne8 28.Nd2 Qe6 29.Nf3 Qd6 30.Ne5 Ne5 31.Be5 Qe6 32.Bd4 Kh7 33.Qe5 Qe5 34.Be5 f6 35.Bb8 Kg6 36.f4 d4 (36...f5 37.Be5–/+) 37.cd4+= c3 38.Bd3 f5 39.d5 Bd5 40.Be5 Be4 41.Be4 fe4 42.Bc3 Kf5 ½–½. Woschkat/Angermann – Maeder,Jean_Claude, ICCF EM/CL/Q15–4 ICCF Email, 2002.

5.Nf3 Be7

6.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.a4).

6.e3 0–0 7.Be2 d5 8.0–0 c5 9.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.a4).

6.e3 d5 7.c4 c5 8.Be2 Nbd7 9.0–0 0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.a4 Nbd7).

4.Nc3 Bb7

5.d3 Bb4 6.a3 Ba5 7.e4 d5 8.Ke2 0–0 9.e5 Nfd7 10.f4 Nc5 11.Nf3 h6 12.d4=+ Ne4 13.Ne4 de4 14.Nd2 Bd2 15.Qd2= Nd7 16.Qe3 Rc8 17.Kf2 c5 18.bc6 Bc6= 19.Ba6 Rc7 20.c3 f5 21.Rhc1+= Qh4 22.Qg3 Qg3= 23.hg3 Rf7 24.a4 g5 25.Ba3+= Ba4? 26.Bd6+– Nb8 27.Bc7 Na6 28.Ra4 Nc7 29.Ra7 Kg7? 30.c4 Kf8 31.Rb7 Rd7 32.Ke3 Ke7?? 33.c5 Nd5–+ 34.Kf2 Rb7 0–1. mic (2145) – johnb (2155), net–chess.com, 2008.

5.e3 a6 6.a4 h6 7.Nf3 Be7 8.Be2 ab5 9.ab5+= d6 10.Ra8 Ba8 11.Qa1 Nbd7 12.0–0 0–0 13.Nd4 Bb7 14.Bf3 d5 15.Ba3 Bc5 16.Nc6 Nb8?? 17.Nd8+– (17.Nd8 Rd8 18.Bc5 bc5 19.Qa7+–) 1–0. mic (2100) – kashikoi (1975), net–chess.com, 2008.

5.e3 Bb4 6.Nge2 0–0 (6...a6 7.a3 (7.Nf4 0–0 8.a3 Ba5 9.ba6 Na6 10.Nh5+=) 7...Be7 8.a4 0–0 9.Nd4 Bb4 10.Nf3+=) 7.d4 (7.a3 Bc3 (7...Bd6 8.a4 a5 9.Ng3 Re8 10.Nh5=) 8.Nc3 (8.Bc3 a6 9.Nf4 ab5 10.Bb5+=) 8...a6= 9.f3 ab5 10.Bb5=; 7.f3 a6 8.a3 Bc5 9.Nc1 ab5 10.Bb5+=; 7.Nf4 a6 8.a4 d6 9.Nd3 Ba5 10.f3+=; 7.a4 a6 8.Nf4 Ba5 9.Nh5 e5 10.Bc4+=; 7.Nd4 a6 8.a3 Bc3 9.Bc3 d6 10.Nf3+=; 7.Ng3 a6 8.ba6 Na6 9.a3 Bc3 10.Bc3+=; 7.Ng1 a6 8.Nf3 d6 9.Be2 Bc3 10.Bc3+=) 7...Ne4 (7...a6 8.a4 d6 9.f3 c6 10.Kf2–/+) 8.Qd3 (8.f3 Nd6 9.a3 Ba5+= 10.Ng3+=) 8...Qh4 (better is 8...Qf6 9.Nf4 a6–/+ 10.Qc4–/+) 9.g3? (better is 9.Ng3–/+ Ba5 10.Rd1–/+) 9...Qf6–+ 10.f3 Bc3 11.Nc3 (11.Bc3 Nf2!! 12.Kf2 Qf3 13.Ke1 Qh1 14.h3–+) 11...Qf3 12.d5 Nc5 13.Qd4 (13.Qe2 Qh1 14.0–0–0 Bd5 15.Nd5 ed5–+) 13...Qh1 14.0–0–0 (14.Na4 f6 15.Nc5 bc5 16.Qc5 Bd5 17.Qc7 Bg2–+) 14...d6 (14...Qh2!? 15.Qf4–+) 15.de6 Ne6 16.Qh4 (16.Qd2 a6–+) 16...Qf3 17.Bd3 Qe3 18.Kb1 h6 19.Ne4 Nd7 20.Nf6 (20.Bc1 Qf3 21.Rf1–+) 20...Nf6 21.Bf6 gf6 22.Qf6 Qg5 23.Rf1 (23.Qf5 Qf5 24.Bf5 a6–+) 23...Qf6 (23...a6 24.a4–+) 24.Rf6 Kg7 (24...Kg7 25.Rf2 a6 26.ba6 Ba6–+) 0–1. Langguth,Wilhelm – Oeder,W, corr ICCF–Cup8 V071, 1990.

5.e3 Be7 6.f4 0–0 7.Nf3 a6 8.Be2 ab5 9.Nb5 Na6 10.0–0 d5 11.Ne5 Nc5 12.Nd4 Ncd7 13.Ndc6 Qe8 14.Ne7 Qe7 15.d3 c5 16.Qe1 Ne5 17.fe5 Nd7 18.Qg3 f6 19.ef6 Nf6 20.Be5 Rf7 21.a3 Bc6 22.Rab1 b5 Black prepares c4 23.Rb3 c4 Attacking the isolated pawn on a3 24.Rfb1?? (better is 24.Rbb1+=) 24...cb3–+ 25.cb3 Qa3 (worse is 25...Ra3 26.Bd6 Qa7 27.Ba3 Qa3 28.Qe5–+) 26.Rf1 Ne8 27.Rb1 Qa2 28.Qe1 Nf6 0–1. Sijses,Wim – Legg,Jerry (1735), IECG, 2004.

5.Nf3 a6 6.e3 ab5 7.Bb5 Ba3 8.Rb1 Qe7 9.0–0 0–0 (9...Bb4 10.Qe2 (10.a4 0–0 11.Ne5 d6 12.Nf3+=) 10...0–0 11.Na4 Ba3 12.Nc3=; 9...Bb2 10.Rb2 0–0 11.d4 Ra3 12.Nb1=) 10.Ba1 (10.Qe2 Nc6= 11.e4 Bb2 12.Rb2=; 10.Re1 Bb4 11.Na4 Ne4 12.c3+=; 10.d3 Bb2 11.Rb2 c6 12.Bc4+=; 10.Ba3 Ra3 11.Rb2 e5 12.Rb3+=; 10.Bc4 Bb2 11.Rb2 Na6 12.d4=) 10...Na6 (10...Nc6 11.d3+= (11.Re1 d5 12.Bb2+=) 11...Nb4 12.e4+=) 11.Re1 (11.Ne5 Rfd8 (11...Nc5= 12.Nc4=) 12.f3=) 11...Nc5 (11...Bc5 12.e4=; 11...d6 12.e4=) 12.d4 (12.Be2 Nce4=) 12...Nce4–/+ 13.Ne4 Ne4 (13...Be4 14.Bd3–/+) 14.Bd3 (14.c4!?+=) 14...Bb4–/+ 15.Re2 Ra2 16.c3 Ra1 17.Be4 (17.Ra1 Nc3) 17...Rb1 18.Qb1? (better is 18.Bh7!? Kh7 19.Qb1 Kh6 20.Qb4 Qb4 21.cb4+=) 18...Be4–+ 19.Qb4 Qb4 20.cb4 Ra8 21.h3 f6 (21...d6 22.Ng5 Bg6 23.Nf3–/+) 22.Rb2 (22.Ne1 Ra4 23.f3 Bg6–/+) 22...Ra1 23.Kh2 Kf7 (23...Bf3 24.gf3 b5 25.Kg3–+) 24.Nd2 (24.Kg3 d6–/+) 24...Bd3 (24...Bg6 25.e4–/+) 25.Rb3 Bb5 26.Nb1 (26.Kg3 d5–/+) 26...Ke7 (26...Bc4 27.Rb2–+) 27.Nc3 (27.Na3 Bc6–/+) 27...Bc4–+ 28.Rb2 Rc1 (28...c6 29.b5 cb5 30.Nb5–+) 29.Ne4 Bd3 (29...e5 30.de5 fe5 31.Ng5–+) 30.Nd2–/+ Rc2 31.Rc2 Bc2 32.Kg3 Bd3 33.e4 Kd6 34.Kf3 (34.Kf4 Kc6–+) 34...Kc6 35.Ke3 Ba6 36.f4 Kb5 37.e5 (37.g3 Kb4 38.e5 fe5 39.de5 Bb7–+) 37...f5 (37...Bb7 38.g3–+) 38.Nf3 (38.g4 Bb7–+) 38...Bb7 39.g4 (39.Nh4–+) 39...Bf3 40.Kf3 (40.g5 Kb4 41.Kd3 d5 42.ed6 cd6–+) 40...Kb4 (40...g6 41.Ke3–+) 41.Ke3 (41.gf5 ef5 42.d5 Kc5–+) 41...Kc4 42.g5 (42.gf5 ef5 43.h4–+) 42...g6 43.h4 b5 (43...b5 44.Kf2 Kd4–+) 0–1. Yeung,Chun Keung (1740) – Giache,Gianluca, corr ICCF WSTT/3/06/1, 2006.

5.Nf3 c5 6.d3 d5 7.a4 Be7 8.Na2 0–0 9.c4 dc4 10.dc4 Nbd7 11.g3 Qc7 12.Bg2 Rfd8 13.Qc2 a6 14.0–0 ab5 15.cb5 Nd5 16.Rfd1 Rac8 17.Nc3 Nc3 18.Bc3 Bf6 19.Bf6 Nf6 20.Rd8 Rd8 21.Ra3 0–1. Jokmin,Alex – Fernandez,Paco, RN–2010–0–00323, 2010.

5.Nf3 d5 6.e3 Bb4 7.d4?? Nbd7 8.a3=+ Bd6 9.Bd3 0–0 10.0–0 Re8 11.Re1 a5 12.e4= e5 13.ed5 Nd5 14.de5+/– Nc3 15.Bc3 Ne5? 16.Ne5+– Be5 17.Be5 Qg5?? 18.Bg3 h5 19.Qc1 Qd5 20.f3 Qd4 21.Kh1 h4 22.Qf4 Qc3 23.Qc7 hg3 24.Qc3 gh2 25.Qc7 (25.Qc7 Rf8 26.Qb7+–) 1–0. marre – qusbepe, internet, 2010.

5.Nf3 Be7 6.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Nc3).

5.Nf3 c6

6.a4 Bb4 7.g3 Bc3 8.Bc3 0–0 9.Bg2 d6 10.d3 Nbd7 11.0–0 cb5 12.ab5 e5 13.Bb2 Rc8 (13...Qc7 14.c4+=) 14.c4 Re8 15.Ra7 Bf3 16.Bf3 Nc5 17.Qc2 d5 18.cd5 Nd5 19.Rc1 Qd7 1–0. Jokmin,Alex – Goti,Javier, RN–2010–0–00297, 2010.

6.bc6 Nc6 7.e4 Bc5 8.e5 Ng4 9.d4 Nd4 10.Nd4 Nf2 11.Kf2 Bd4?? (better is 11...Qh4 12.Ke3 Qg5 13.Kf2 Qf4 14.Ke1 Bd4=+) 12.Qd4+– 0–0 (12...f6 13.Nb5 0–0 14.Kg1+–) 13.Ba3 Re8 14.Bd3 Rc8 15.Bd6 Bd5 (15...Qg5 16.Ne4 Qh4 17.g3+–) 16.Nd5 ed5 17.Rhf1 Qg5 18.Kg1 f6 (18...Re6 19.Qd5 Rce8 20.Qf3+–) 19.Rf5 fe5 (19...Qh6 20.Qd5 Re6+–) 20.Qd5 Re6 21.Rg5 (21…g6 22.Bg6 hg6 23.Be5 Rcc6 24.Rg6 Kf7 25.Rg7 Ke8 26.Qd7 Kf8 27.Qf7) 1–0. themonkey (2145) – Peagasus, GameColony.com, 2003.

4.c4 Bb7

5.Nf3 a6 6.a4 c5 7.e3 ab5 8.cb5 d5 9.d3 Nbd7 10.Be2 Bd6 11.h3 0–0 12.Nbd2 Qc7 13.Qc2 e5 14.e4 Rfe8 15.0–0 d4 16.Nc4 Nf8 17.Bc1 h6 18.Bd2 Ng6 19.g3 Bc8 20.Kg2 Be6 21.Rfb1 Bc4 22.Qc4 Ra7 23.a5 Rea8 24.a6 Qe7 25.Bc1 Rd8 26.Nd2 Bc7 27.Qb3 Ne8 28.Bh5 Qg5 29.Bg4 Qe7 30.Bf5 Nf8 31.h4 g6 32.Bh3 Kg7 33.Nf3 Nd6 34.Qc2 Qe8 35.Qd2 f6 36.Qh6 Kg8 37.Qd2 Nb5 38.Qa2 Kg7 39.Qa4 Nc3 40.Qe8 Re8 41.Rb3 b5 42.Bd2 b4 43.Bc3 dc3 44.Ne1 Rea8 45.Nc2 Ra6 46.Ra6 Ra6 47.Bc8 Ra2 0–1. Helgesen – Haugen, 1989.

5.Nf3 Be7 6.Nc3 0–0 7.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.Nc3).

5.Nc3 Be7

6.e3 0–0 7.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.Nc3).

6.e3 a6 7.a4 (7.Nf3 0–0=) 7...0–0 (7...e5 8.d3+=) 8.Nf3 Ne4 (8...d5 9.d4+=) 9.Bd3 (9.Be2 Nc3 10.Bc3 d5=) 9...Nc5 (9...Nc3 10.Bc3 Bf6 11.Bf6 Qf6 12.Rc1+=) 10.Bc2 f5 (10...ab5 11.ab5 Ra1 12.Ba1 f5=) 11.Rg1 (11.0–0 Qe8=) 11...Bf6 (better is 11...Ne4+=) 12.g4?? (better is 12.d4 Ne4 13.Ne4 fe4 14.Nd2=) 12...ab5 (12...fg4 13.Nd4 Bh4 14.Qg4 Bf2 15.Ke2 Bg1 16.Rg1–+) 13.g5 (13.ab5 Ra1 14.Ba1 fg4–+) 13...Bc3 14.Bc3 bc4 15.Ne5 Be4 (15...Bd5 16.Qh5 Qc8 17.Ng4+–) 16.Nc4 Nc6 17.d3 Bd5 18.Nd2 (18.Qh5 d6–+) 18...e5 19.Qh5 Qe8 Black plans e4 (19...Qe7 20.Qh4–+) 20.g6 (20.Qe8 Rfe8 21.Kd1 Kf7–+) 20...h6 21.Nf3 Bf3 (21...e4 22.d4 Na4 23.Ba4 ef3 24.Kd2–+) 22.Qf3 e4 (22...Qe6 23.Qe2–+) 23.de4 (23.Qd1 Qe6 24.d4 Qf6–/+) 23...fe4 24.Qd1 Qe7 (better is 24...Qe6–+) 25.Qd5+= Qe6 (better is 25...Kh8 26.Qh5 Rf6+=) 26.Qh5?? (better is 26.Qe6 de6 27.Rg4=) 26...Rf5 (better is 26...Qc4!? 27.Ra3 Nb4 28.Qe2 Nc2 29.Qc2 Ra4 30.Ra4 Na4 31.h3–+) 27.Qe2 (27.Qd1 Qc4 28.Qd2 Rd5–+) 27...Raf8 (27...Ne5!? 28.Be5 Qe5 29.Qd1–+) 28.Rg2 Ne5 29.Kd2? (29.Be5 Qe5 30.Qc4 d5 31.Qd4 Qd4 32.ed4–+) 29...Ned3 (29...Qd5 30.Kc1 Rf2 31.Rf2 Rf2 32.Qd1 Ned3 33.Kb1–+) 30.Rf1 Qa2 31.Qd1 Nf2 (better is 31...Nb3 32.Ke2 Nbc1 33.Kd2 Rd5–+) 32.Qa1 (32.Qb1 Qd5 33.Bd4–+) 32...Nb3 33.Ke1 Na1 34.Be4 (34.Ba1 Qc2 35.Rff2 Rf2 36.Rf2 Rf2 37.Bg7 Qd2) 34...Nc2 35.Bc2 Qc2 36.Rgf2 (36.Rff2 Rf2 37.Rf2 Rf2 38.Bg7 Qd2) 36...Rf2 37.Rf2 Rf2 38.Bd4 (38.Bg7 Qd2) 38...Qe2 (38...Qd2) 0–1. Jolayxvort,J – Weise,Martin, Dortmund, 1987.

6.e4 0–0 7.Qc2 a6=.

6.Nf3 0–0 7.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.Nc3).

5.d4 Be7

6.a4 0–0 7.e3 c6 8.Be2 cb5=+ 9.ab5? a6?? 10.Nf3= ab5 11.Ra8 Ba8 12.cb5 d5 13.0–0+= Nbd7 14.Ne5 Ne4 15.f3 Nd6 16.Nc6 Bc6=+ 17.bc6 Nb8 18.Qc1 (18.Qc2 Qc7=+). wood – distaff, Live Game Caissa's Web, 2005.

6.f3 0–0 7.e4 d5 8.e5 Nfd7 9.Bc3 dc4 10.Bc4 c5 11.d5 ed5 12.Bd5 Qc8 13.Ne2 a6 14.a4 ab5 15.ab5 Ra1 16.Ba1 Bd5 17.Qd5 Rd8 18.e6 fe6 19.Qe6+/–.

5.e3

5.e3 (--> 4.e3 Bb7 5.c4).

5.e3 c5 6.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4).

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

5.e3 c5 6.Nf3 Be7 7.Be2 0–0 8.0–0 d5 9.cd5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.cd5).

5.e3 d5 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4).

5.e3 Be7 6.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4).

5.e3 Be7 6.Nf3 0–0 7.Be2 c5 8.0–0 d5 9.d3 Nbd7 10.Nbd2 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 0–0 7.0–0 d5 8.d3 c5 9.Nbd2 Nbd7 10.c4).

5.e3 Be7 6.Nf3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 Be7).

5.e3 Be7 6.Nf3 d6 7.Be2 Nbd7 8.0–0 0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.Be2 d6 8.0–0 Nbd7).

4.e3 a6

5.a4 Bb4 6.Bc3 Bc3 7.Nc3=.

5.a4 c6 6.c4 d5 7.d4 Bb4 8.Bc3 c5 9.Nf3 Ne4 10.Bb4 cb4 11.Bd3 a5 12.0–0 Ng5 13.Ng5 Qg5 14.Nd2 0–0 15.c5 bc5 16.dc5 Nd7 17.Nf3 Qf6 18.Qc2 h6 19.c6 Nb6 20.Qc5 Rb8 21.Nd4 e5 22.Nb3 e4 23.Be2 Qb2 24.Nd4 Qc3 25.Qd6 Be6 26.Rfc1 Qd2 27.Rc2 Rbd8 28.Qf8 Kf8 29.Ne6 fe6 30.Rd2 Rc8 31.f3 ef3 32.Bf3 Ke7 33.e4 Nc4 34.Rd4 de4 35.Rc4 ef3 36.Rd1 1–0. Trkn – Lonnie Hammock, itsyourturn.com, 2000.

5.a4 Bd6 6.Nf3 Qe7 7.Be2 Ne4 (7...Bb7 8.0–0=) 8.d3 Nf6 9.e4 e5 10.Nbd2 Bb7 (10...0–0 11.0–0+=) 11.Nc4 Can e5 get defended? (11.0–0 Ng4+/–) 11...0–0 (11...Bb4 12.c3 Bd6 13.0–0+=) 12.Nfe5 (12.0–0!?+/–) 12...Be5+= 13.Be5 d5 14.Bf6 (14.ed5 Bd5 15.Bf6 Qf6+=) 14...Qf6 15.ba6 Na6 16.Nd2 (16.ed5 Bd5 17.Ne3 Qc3 18.Kf1 c6=) 16...Rfe8 (16...Nc5 17.0–0–/+) 17.f3 (17.ed5 Bd5 18.0–0 Nb4=) 17...Qd4 (17...Nc5!?+=) 18.Nb3= Qc3 (18...Qb2 19.Qc1 Qc1 20.Nc1=) 19.Qd2+= Qe5 (19...Qf6 20.0–0+=) 20.0–0 White plans a5 20...de4 (20...Qe6 21.a5+=) 21.fe4+/– Re6 (21...Nc5 22.d4 Nb3 23.cb3+/– (23.de5?? Nd2 24.Rfd1 Ne4–+)) 22.Qf4 (22.d4 Qd6 (22...Qe4?? 23.Bf3 Qe3 24.Qe3 Re3 25.Bb7+–) 23.e5 Qd8+–) 22...Rf8 (22...Qf4!? 23.Rf4 Nb4+/–) 23.Qe5+– Re5 24.a5 ba5 (24...Nb4 25.c3 Nd5 26.a6+–) 25.Ra5 (better is 25.Na5 Bc8 26.Rfb1+–) 25...c5 (better is 25...Ra5 26.Na5 Ba8+–) 26.d4 Re4 27.Ra6?? (better is 27.Ba6 Ba6 28.Ra6+–) 27...Bd5?? (better is 27...Re2 28.Ra7 Rg2 29.Kh1 Bc6–+) 28.Nc5 (better is 28.Bf3 Bb3 29.Be4+–) 28...Rd4?? (better is 28...Re2 29.Rf2 Re1 30.Rf1 Rf1 31.Kf1 Bc4 32.Ke1 Ba6 33.Na6 Re8 34.Kd2 Re6–/+) 29.Nb3 (29.Nb3 Rb4 30.Ra7+–; better is 29.Rd6 Ra8+–) 1–0. De Visser,Arno – Terrahe, 1982.

5.a4 Be7 6.c4 0–0 7.Qf3 c6 8.Qd1 ab5 9.ab5 Ra1 10.Ba1 cb5 11.cb5 d5 12.Nf3 Ne4 13.Nc3 Nc5 (13...Bb7 14.Be2=) 14.d4= Nb7 15.Be2 Bb4 16.0–0 Nd6 17.Qb3 Ba5 18.Ne5 f6 19.Nf3 Bd7 20.Bb2 Bc3 21.Bc3 (worse is 21.Qc3 Bb5 22.Bb5 Nb5–/+) 21...Ne4 22.Bb2 f5 23.Rc1 Qf6 24.Rc7 Qg6? (better is 24...Rc8 25.Rc8 Bc8+/–) 25.Ne5+– Qe8 26.Qa3 Bb5 (26...f4 27.ef4 Rf4 28.f3+–) 27.Qa7 (27.Bb5!? Qd8 28.Qa7 Qh4+–) 27...Bd7 28.Nd7 (28.Rd7?! Nd7 29.Nd7 Rf7=) 28...Rf7 (28...Nd7 29.Rd7 Rf7 30.Rf7 Qf7 31.Qb6+–) 29.Ne5 (better is 29.Nb8 Rc7 30.Qc7+–) 29...Rc7 30.Qc7 Nf6 (30...h6 31.Ba3 f4 32.f3+–) 31.Qb6 (better is 31.Bb5! Qf8+–) 31...Nbd7 32.Nd7 Nd7 33.Bb5 (better is 33.Qa6!? Nb8 34.Qd6 h6+–) 33...Qe7 1–0. GuestMXJR – Chiccopaz, freechess.org, 2017.

5.a4 a5

6.c4 Bb7 7.Nf3 Be7 8.Be2 0–0 9.0–0 c6 10.d4 cb5 11.cb5 d5 12.Ba3 Nbd7 13.Be7 Qe7 14.Nbd2 Ne4 15.Ne4 de4 16.Nd2 f5 17.Qb3 Bd5 18.Bc4 Rac8 19.Bd5+/– ed5 20.Qd5 Kh8 21.Rfc1 Rc1 22.Rc1 Nf6 23.Qc6 h6? 24.h3?? Qb4 25.Qc4?? Qd2–+ 26.Qf7?? Qc1 27.Kh2 Rf7 28.h4 Ng4 29.Kg3 Qf1 30.f3 Qf2 31.Kh3 ef3 32.h5 Qg2 (33.Kh4 Qh2#) 0–1. Grits – maxeem, Caissa.com, 2004.

6.d4 Bb7 7.Nf3 d6 (7...Ne4 8.Bd3=) 8.Bd3+= h6 (8...Be7 9.0–0=) 9.0–0 Nbd7 (9...Be7 10.Nc3+=) 10.c4 Be7 11.Nbd2 0–0 12.Qc2 (12.Re1 c6+=) 12...Rc8 13.e4 c5 (13...c6 14.bc6 Bc6 15.Qb3+=) 14.e5 (14.d5 Ng4+=) 14...Ne8= 15.Rfe1 (15.Rad1 cd4 16.Bd4 de5 17.Ne5 Ne5 18.Be5 Bd6=) 15...d5 (15...cd4 16.Bd4 de5 17.Ne5=) 16.Rad1 (16.Rac1 dc4 17.Bc4 Nc7+=) 16...cd4 (16...Nc7 17.Be2=) 17.Nd4 (17.Bd4 dc4 18.Bc4 Bb4+=) 17...Nc5 18.Be2 Qc7 (18...Nd7 19.f4+=) 19.cd5 Bd5 20.Bf3 Qb7 (20...Bf3 21.N2f3 Rd8 22.Nc6 Rd1 23.Rd1+/– (23.Ne7?! Qe7 24.Rd1 Nc7+/–)) 21.Nc6 Bf3 (21...Rc6 22.bc6 Qc6 23.Ba3+/–) 22.Nf3 (worse is 22.gf3 f6+=) 22...Bd8?? (better is 22...Kh8+/–) 23.Nd8+– (23.Nd8 Qa8 24.Nc6 Rc6 25.bc6 Qc6 26.Ba3 Qa4 27.Qa4 Na4 28.Rd8+–) 1–0. DEFFM – GuestGCRV, freechess.org, 2018.

6.Qf3 c6 7.c4 (7.Bf6 gf6 8.d4 e5=) 7...Bb7 8.Qd1 Be7 9.Nf3 d6 10.Be2 Nbd7 11.d4 h6 (11...Rc8 12.Nc3=) 12.Nbd2 (12.0–0 Rc8=) 12...0–0 13.0–0 Rc8 14.h3 (14.bc6 Bc6 15.Rb1 Ne4=) 14...c5 15.Rc1 Re8 16.Re1 Ne4 (16...cd4 17.Nd4 Qc7 18.Bf3=) 17.Ne4 Be4 18.Nd2 Bg6 19.Bf3 Nb8 20.dc5 dc5 (worse is 20...Rc5 21.Bd4+/–) 21.Qb3?? (21.Ne4 Qc7+=) 21...Qc7?? (21...Qd2 22.Red1 Qb4=) 22.Ne4 Rcd8 23.Rcd1 Rd1 24.Rd1 Rd8 25.Qc3 f6 26.Rd8 Qd8 27.g3 (27.Qc2 Nd7=) 27...Nd7 (27...Be4 28.Be4 Qd1 29.Kg2 Qa4 30.Bc2=) 28.Qd2 Qc7 29.Kg2 Qb7 1–0. GuestQGGS – GuestFWFP, freechess.org, 2017.

6.Qf3 d5 7.c4 Bb7 8.Bf6 gf6 9.d4 Nd7 10.Nc3 Bb4 11.Nge2 Qe7 12.g3 Ra7 13.cd5 Bd5 14.e4 Bb7 15.Bg2 f5 16.0–0 Nf6 17.Qd3 fe4 18.Be4 Ne4= 19.Ne4 0–0 20.Rfc1 f6 21.Ra2 Qd7 22.Rac2 Ba8 23.Nf4 Bd6 24.Nd6+/– cd6 25.Qc4 Kh8? 26.Qe6+– Qe6 27.Ne6 Re8 28.Nc7 Re4 29.Na8 Ra8 30.Rc8?? Rc8+/– 31.Rc8 Kg7 32.Rc6 Rd4 33.Rb6 Ra4 34.Rd6 Rb4 35.b6 Kg6 36.Rd5 Rb6 37.Ra5 f5 38.h4 Kh5? 39.Rf5+– Kg4 40.Rf4 Kh3 41.Kf1 Rg6? 42.Ke2 Kg2 43.Ke3 Re6 44.Kd3 Rd6 45.Ke4 Re6 46.Kf5 Re2 47.h5 Rf2 48.Rf2 (48.Rf2 Kf2 49.g4+–) 1–0. Trkn – Hammock, itsyourturn.com, 2000.

6.Nf3 Bb7

7.c4 d6 8.d4 d5=.

7.c4 d6 8.Be2 Nbd7 9.d4 Be7 10.0–0 h6 11.Qc2 0–0 12.Nc3 Rc8 13.e4 c5 14.bc6 Bc6 15.d5 ed5 (15...Bb7!?=) 16.cd5+/– (worse is 16.Nd5 Nd5 17.ed5 Bd5+=) 16...Bb7 17.Nd4 Ne5 18.f4 Nc4 19.Bc1 Nd7 (19...Re8 20.Rb1+=) 20.Rf3 Bf6 21.Ndb5 Qe7 22.Qa2 Bc3 23.Rc3 Qe4 24.Rc4 Rc4? (better is 24...Qd5!? 25.Bf1 Rc4 26.Bc4 Qc5 27.Kh1 d5+–) 25.Qc4+– (worse is 25.Bc4 Bd5 26.Qe2 Qc4 27.Qc4 Bc4 28.Nd6 Bd5–/+) 25...Bd5 (25...Qd5 26.Qd5 Bd5 27.Nd6+–) 26.Qe4 Be4 27.Nd6 (27.Nd6 Bc6 28.Be3+–) 1–0. DEFFM – GuestJRWT, freechess.org, 2017.

7.c4 d6 8.Be2 Nbd7 9.d4 Be7 10.Nbd2 0–0 11.0–0 c6 12.h3 (12.Bd3 c5=) 12...c5 13.Qc2 (13.Rc1 Rc8=) 13...h6 (13...Rc8 14.dc5 Nc5 15.Ng5=) 14.e4 (14.Rad1 Rc8=) 14...cd4 15.Nd4 Rc8 16.Nc6 (16.Rfd1!?=) 16...Bc6–/+ 17.bc6 Rc6 18.Bf3 Ne5 19.Be5 (19.Be2 Qc7–/+) 19...de5 20.Qb2 (20.Rab1 Qd4–/+) 20...Bb4–+ 21.Rfd1 Qc7 22.Rac1 Nd7 (22...Rd8!? 23.Nf1 Rd1 24.Rd1 Rc4 25.Ne3–+) 23.Nf1 Nc5 (23...Rd8 24.Be2–+) 24.Qe5?? (better is 24.Ra1–/+) 24...Qe5–+ 0–1. GuestFJQJ – GuestJLLN, freechess.org, 2016.

7.c4 d6 8.Be2 Nbd7 9.d4 Be7 10.Nbd2 h6 11.Qc2 (11.0–0 0–0+=) 11...Rc8 12.0–0 c5 (12...0–0 13.Rad1+=) 13.Rfe1 (13.bc6 Bc6 14.Rfc1 0–0+=) 13...0–0= 14.e4 (14.Rad1 cd4 15.Bd4 Qc7=) 14...cd4 15.Nd4 Nc5 16.e5? (better is 16.Bf3!?=) 16...de5–/+ 17.Nc6 (17.N4f3 e4 18.Ne5 Qc7–/+) 17...Bc6 18.bc6 e4 (18...Qc7 19.Bf3 Bd6 20.h3–/+) 19.Rad1 Nd3 20.Bf6? (20.Bd3 ed3 21.Qb3 Rc6–/+) 20...Bf6 (20...Ne1 21.Re1 Bf6 22.Ne4 Rc6 23.Rd1–+) 21.Ne4? (better is 21.Rf1!? Be5 22.Ne4–/+) 21...Ne1–+ 22.Nf6 (22.Re1 Rc6 23.Nf6 Qf6–+) 22...Qf6 23.Re1 Rc6 24.Bf3 Rd6 (24...Rc7 25.Qb3–+) 25.c5 bc5 26.Qc5 Rfd8 (26...Qd8 27.h3–+) 27.Qa5 Qb2 (27...Rd2 28.Qb6–+) 28.Qc5 (28.Qb5 Rd2–+) 28...Qd2 (28...Rd4 29.Qb5 Rb8 30.Qb2 Rb2 31.Bc6–+) 29.Rf1 Ra6 (29...Rd4 30.Bc6–+) 30.Qb5 Qa5 (30...Ra5 31.Qb3–+) 31.Qa5 (31.Bc6 Rd2–+) 31...Ra5 32.Bc6 Rc5 33.Bb5 Rdc8 (33...Rd2 34.g4–+) 34.g3 1–0. GuestWRDY – GuestYXGL, freechess.org, 2018.

7.d4 d6 (7...Ne4 8.Bd3=) 8.Bd3+= h6 (8...Be7 9.0–0=) 9.0–0 Nbd7 (9...Be7 10.Nc3+=) 10.Nbd2 (10.c4 Be7+=) 10...Be7 11.c4 0–0 12.Qc2 (12.Re1 Rc8+=) 12...Rc8 13.e4 c5 (13...c6 14.bc6 Bc6 15.Qb3+=) 14.e5 (14.d5 Ng4+=) 14...Nh5 (14...Ne8 15.Rad1=) 15.ed6+= Bd6 16.Bh7 Kh8 17.Be4 Qc7 18.Bb7 Qb7 19.Ne4 Be7 20.Ne5 (20.Rad1 cd4 21.Rd4 Ndf6+=) 20...Ne5 21.de5 0–1. GuestXPVS – GuestHWRC, freechess.org, 2018.

7.Be2 d6 8.0–0 Nbd7 9.d4 Be7 10.c4 0–0 11.Nbd2 h6 12.Qc2 Rc8 13.e4 c6 14.Qb3 (14.bc6 Bc6 15.Rfc1 Nh5=) 14...c5 (14...cb5 15.ab5 Ne4 16.Ne4 Be4 17.Nd2–/+) 15.Rac1 (better is 15.d5!?=) 15...Ne4–/+ 16.d5 ed5 17.cd5 Nd2 18.Nd2 Bf6 19.Bf6 Qf6 20.Bg4 Rcd8 21.Bd7 Rd7 22.Qh3 Re7 (22...Qd8!? 23.Qf5 Re8+=) 23.Nc4+= Bd5 24.Nb6 Be6 25.Qd3 Bf5 26.Qd2 Rfe8?? (better is 26...Qg6 27.Nd5 Re5=) 27.Nd5+– (27.Nd5 Qg6 28.Ne7 Re7 29.Qa5+–) 1–0. GuestLGCH – GuestZRQQ, freechess.org, 2018.

7.Be2 d6 8.0–0 Nbd7 9.Nd4 Be7= 10.c4 0–0 11.Nc3 Rc8 (11...e5 12.Nf5+=) 12.f4 c5 (12...Nc5 13.Bf3+=) 13.bc6 Bc6 14.Nc6 (14.f5 ef5 15.Nc6 Rc6 16.Rf5 Ne5+/–) 14...Rc6+= 15.Rc1 Nc5 (15...Rc8 16.f5+=) 16.Bf3+/– Rc8 17.d4 Ncd7 18.Qb3 Qc7 19.Nb5 Qb8 20.Rf2 (20.Ba3 Rfe8+/–) 20...Rfd8 (20...d5 21.cd5 Nd5 22.f5+/–) 21.g3 (21.Ba3 Bf8+/–) 21...Ne8 (21...e5 22.fe5 de5 23.Qc2+/–) 22.Kg2 (22.f5 ef5 23.Bg2 g6+=) 22...Nc7 23.Nc3 Na6 (23...f5 24.Rb1+/–) 24.Ba3 (24.f5 ef5 25.Qb5 Nb4 26.Qf5 g6+/–) 24...Nb4 (24...Nc7!?+/–) 25.Bb4+– ab4 26.Qb4 Qa7 (26...Re8 27.Qb5 Nf6 28.f5+–) 27.Nb5 Qa5 (27...Qa6!?+–) 28.Qa5 ba5 29.Na7 Rc7 (29...Nb6 30.Nc8 Rc8 31.Rfc2 Na4 32.Rb1+–) 30.Nc6 Nb6 (30...Re8 31.Rb1+–) 31.Nd8 (31.Nd8 Bd8 32.Rb2 Nc4 33.Rb8+–) 1–0. DEFFM – GuestCSMY, freechess.org, 2018.

7.Be2 d6 8.0–0 Nbd7 9.Nd4 Be7 10.Nc6 Qc8 (10...Bc6 11.bc6 Nb8 12.Bb5=) 11.Bf3 (11.Ne7 Ke7 12.d3 Re8+=) 11...Nb8 (11...Bd8 12.d3+=) 12.Ne7+/– Ke7 13.e4 (better is 13.Bf6 Kf6 14.Nc3+/–) 13...Be4?? (13...Ne4 14.Re1 Nf6 15.Ra3=) 14.Be4?? (better is 14.Bf6 Kf6 15.Be4+–) 14...Ne4+/– 15.Qf3 (15.Bg7 Rg8 16.Bb2 Qb7+=) 15...d5+= 16.c4 Nf6 (16...c6!?+=) 17.Re1+/– Nbd7 18.cd5 Nd5?? (better is 18...Re8+/–) 19.Qd5+– Rd8 (19...Nf6 20.Ba3 Ke8 21.Qc6 Kd8 22.Re3+–) 20.Qg5 (worse is 20.Bg7 Rg8 21.Bd4 Rb8+–) 20...Nf6 (20...Ke8 21.Qg7 Qb7 22.Ba3+–) 21.Qg7 (21.Qg7 Ne8 22.Qh7+–) 1–0. DEFFM – GuestWDRR, freechess.org, 2018.

7.Be2 d6 8.c4 Nbd7 9.d4 Be7 10.0–0 h6 11.Nbd2 0–0 12.Qc2 Rc8 13.e4 c5 14.d5 e5 (14...Nh5 15.Nb3+=) 15.Nh4 (15.Rae1 Ne8+=) 15...Nd5= 16.ed5 (16.cd5 Bh4 17.Nc4 Qc7=) 16...Bh4 17.Ne4 (17.Rae1 f5+=) 17...Be7 (17...Qe7 18.Rae1+=) 18.f4 Nf6 (better is 18...f5 19.Ng3 e4=) 19.fe5+/– Ne4 (better is 19...de5!? 20.Be5 Nd7+/–) 20.Qe4+– de5 21.Be5 (21.Bd3 f5 22.Rf5 Rf5 23.Qf5 Bf6+–) 21...Bd6 (better is 21...Bg5!?+–) 22.Bd3 g6?? (22...f5 23.Rf5 Rf5 24.Qf5 Be5 25.Qe5+–) 23.Bf6 (better is 23.Rf7! Qg5 24.Rg7 (24.Bd6?! Rf7 25.Qe6 Qf6 26.Qf6 Rf6+–; 24.Rb7?! Be5 25.Rb6 Rf5 26.Rg6 Qg6 27.Qf5 Qf5 28.Bf5 Bd4 29.Kh1 Ba1 30.Bc8 Be5+–) 24...Kh8 25.Rg6 (25.Rb7?! Be5 26.Rb1 Rf6+/–) 25...Be5 26.Rg5 Bd4 27.Kh1+–) 23...Qe8 24.Qh4 Kh7?? (better is 24...Qe3 25.Kh1 h5+–) 25.Bg5 (25.Rf3!? Qd7 26.Rh3 Qh3 27.Qh3 Rc7+–) 25...h5 (25...Be5 26.Rae1 Kg8 27.Bh6+–) 26.Qh5 (better is 26.Rae1!? Qd7 27.Qh5 Kg8+–) 26...Kg8 27.Qh6 (better is 27.Qh4 Be5 28.Rae1+–) 27...Qe5 (27...f5 28.Rae1 Be5+–) 28.Bf6 Qd4 1–0. GuestCTYJ – GuestYJGP, freechess.org, 2018.

7.Be2 Be7 8.0–0 d6 9.c4 Nbd7 10.d4 h6 11.Nbd2 0–0 12.Qc2 Rc8 13.e4 c5 14.bc6 Bc6 15.Rfe1 Re8 16.h3 (16.Rac1 d5 17.cd5 ed5+=) 16...Bb7 17.Bd3 Bf8 (17...d5 18.ed5 Nd5 19.Bh7 Kh8 20.Be4=) 18.Nb3 (18.Qb3 d5+=) 18...e5 (18...d5 19.Nbd2=) 19.Rad1 Qc7 20.Nbd2 Ba6 21.Re3 Nh5 22.g3 Nhf6 23.Nh4 (23.Rb1 Bb7+=) 23...d5= 24.ed5 (24.de5 Ne4 25.Ne4 de4 26.Be4 Bc4 27.Bh7 Kh8+=) 24...Nd5+= 25.Rf3 N7f6 (25...Nb4 26.Bh7 Kh8 27.Qb1+=) 26.de5 Re5?? (better is 26...Nb4 27.Qb1 Nd3 28.Rd3 Nd7=) 27.cd5+– Qc2 28.Bc2 Rc2 (28...Rd5 A) 29.Bf6? Rc2 30.Rb1 Rcd2 (30...gf6 31.Ne4 Rd4 32.Nf6 Kh8 33.Rb6=) 31.Rb6 Bd3–+ (31...gf6 32.Ra6 R2d4 33.Raf6+=); B) 29.Bb3 Be2 30.Bd5 Bd1 31.Rf6 gf6 32.Ne4+–) 29.Be5 Be2 30.Rb1 (30.Bf6?! Bd1 31.Rd3 gf6+/–) 30...Rd2 31.Bf6 gf6 32.Rf6 Kg7?? (better is 32...Bc5+–) 33.Rbb6 Rd5 34.Nf5 Kg8 (34...Rf5 35.Rf5 Bb4 36.Rf4+–) 35.Rb8 Rd1 36.Kh2 Rf1 (36...Bd3 37.Nh6 Kg7 38.Rf7 Kh6 39.Rb6 Bg6 40.Rf8 Kg7+–) 37.Nh6 Kg7 (37...Kh7 38.Rf8 Bh5 39.Nf7+–) 38.Rf7 Kh6 39.Rb6 Kg5 40.f4 (40.f4 Rf4 41.gf4 Kh4 42.Rf8 Bh5 43.Rg8 Bg6 44.Rgg6 Kh5 45.Rh6) 1–0. DEFFM – GuestQHTH, freechess.org, 2018.

7.Be2 Be7 8.0–0 d6 9.c4 Nbd7 10.d4 h6 11.Nbd2 0–0 12.Qc2 Rc8 13.e4 c5 14.e5 (14.bc6 Bc6 15.Qd3 Re8=) 14...Nh7 (14...Ne8 15.Rae1=) 15.Bd3+= Ng5 16.Ng5 Bg5 17.ed6 cd4 (17...Bf4 18.Bh7 Kh8 19.Be4 Be4 20.Ne4=) 18.Bd4= Nc5? (18...Bf6 19.Bf6 Nf6 20.Nb3 Qd6 21.c5 bc5 22.Na5+=) 19.Bh7 (better is 19.Bc5!? Rc5 20.Nb3+/–) 19...Kh8+= 20.Bc5 Rc5 21.Nb3 Rc4? (better is 21...Rc8 22.Rad1 Bd5=) 22.Qc4+– Kh7 23.Rad1 Bd5 24.Rd5 ed5 25.Qd5 Bf4?? (better is 25...Kg8+–) 26.Qf5 (26.Qf5 Kg8 27.Qf4+–) 1–0. DEFFM – GuestSZCD, freechess.org, 2017.

7.Be2 Be7 8.c4 d6 9.0–0 Nbd7 10.d4 h6 11.Qc2 0–0 12.Nc3 c5 13.bc6 Bc6 14.e4 Rc8 15.Bd3 Kh8 16.Nb5 (16.Rab1 d5 17.cd5 ed5+=) 16...Bb7 17.Rfe1 White plans e5 (17.Qe2 Re8+=) 17...Re8 (17...d5 18.ed5 Nd5 19.Qb3=) 18.e5 de5 19.Ne5 Ne5 20.de5 Nd5 21.Rad1 Nb4 (21...Bb4!? 22.Re4 Qg5+=) 22.Qe2+/– Rc5 23.Bb1 (23.Bd4 Rc8 24.Be3+–) 23...Qb8 (23...Qa8 24.Bd4 Bg2 25.Bc5 Bc5+–) 24.Bd4+– Rc6 25.Qe4 g6 26.Nd6 Bd6? (26...Rf8+–) 27.ed6 Kg8 (27...Kh7 28.Qf4 f5+–) 28.Qe5 (28.Qe5 f6 29.Qf6 e5 30.Qg6 Kf8 31.Qh6 Kg8 32.Bh7 Kh8 33.Re5 Re5 34.Be5) 1–0. GuestTSTG – GuestPHWM, freechess.org, 2018.

5.a4 ab5

6.ab5 Ra1 7.Ba1 Bb7 8.Nf3 d5+= 9.Be2 (9.c4 Nbd7+=) 9...Nbd7 10.0–0 (10.Nc3 Bd6+=) 10...Bd6 11.c4 0–0 (11...dc4 12.h3+=) 12.cd5 Nd5 13.Nc3 Nc5 (13...Qe7 14.Nd5 Bd5 15.Qc2+=) 14.Nd5+= Bd5 15.Qc2 Qd7 (15...Qe7 16.Bd4=) 16.Ne5 (16.d4 Ne4=) 16...Qe8 (16...Qe7 17.f4=) 17.Nc4 (17.d4!? Bb3 18.Qd2 Be5 19.dc5 Ba1 20.Ra1 bc5 21.Qc3=) 17...Qb5= 18.Rb1 Qd7 (18...Qa6 19.Bd4+= (19.Nd6? Qe2 20.Qb2 f6–+)) 19.Nd6= Qd6 20.Rb4 (better is 20.d4!? Nd7 21.e4=) 20...Ra8–/+ 21.Qc3 (21.Bd4 f5–/+) 21...f6–+ 22.Rg4 (22.f3 e5–+) 22...e5 23.f4?? (better is 23.f3 Ra2 24.Bc4 Bc4 25.Qc4 Qe6 26.Bc3–+) 23...Ne4 24.Qb2 (24.Qc1 Qc5 25.Bc3 Ra3 26.fe5 Nc3 (26...Rc3?! 27.dc3 Nc3 28.Qd2 Ne2 29.Qe2 fe5 30.h4=) 27.dc3 Rc3–+) 24...Ra2 25.Qc1 (25.fe5 Qc5 26.Qb1 Rd2 27.Re4 Be4 28.Qe4 Re2–+) 25...Qc5 26.Qe1 (26.Bc3 ef4 27.Bb2 Qc1 28.Bc1 g5 29.ef4 Ra1 30.fg5 Rc1 31.Bf1 Bc4 32.gf6 Kf7–+) 26...Rd2 27.fe5 (27.Bf3 Rc2 28.h3–+) 27...Qe3 28.Kf1 (28.Kh1 Re2 29.Rg7 Kg7 30.ef6 Kg6 31.Qf1 Re1 32.h3 Rf1 33.Kh2 Qg3) 28...Rc2 (28...Re2 29.Rg7 Kg7 30.ef6 Kf8 31.Qe2 Qc1 32.Qe1 Bc4 33.Kg1 Qe1) 29.Rg7 Kg7 30.ef6 (30.Bd4 Qd4 31.Bb5 Rc1 32.ef6 Qf6 33.Ke2 Re1 34.Ke1 Qf2 35.Kd1 Qd2) 30...Kf8 (30...Kf8 31.Bb2 Rb2 32.g3 Nd2 33.Qd2 Rd2 34.h3 Qe2 35.Kg1 Qf2) 0–1. Woerlein,Rene (2050) – Cleve,Carsten, Crailsheim op, 1999.

6.ab5 Ra1 7.Ba1 Bb7 8.Nf3 d6 9.c4 Nbd7 10.d4 Qa8 11.Nbd2 Ne4 12.Ne4 Be4 13.Bc3 Be7 14.Be2 0–0 15.0–0 Nf6 16.Qb3 h6 17.Ra1 Qb7 18.Ra6 Bf3 (18...Ra8!? 19.Qa4 Ra6 20.Qa6 Qb8+=) 19.Bf3+/– d5 20.h3 c6 (20...Ra8 21.Qa4 Ra6 22.ba6+=) 21.Qa2 (21.Qa4 cb5 22.Qb5 Rb8+=) 21...cb5 (21...Bd6!?+=) 22.Ra7+– (22.Ra7 Qc6 23.Re7 bc4 24.Ra7+–; 22.cb5?! Rc8 23.Ra7 Qb8+=) 1–0. DEFFM – GuestZLDQ, freechess.org, 2018.

6.ab5 Ra1 7.Ba1 Bb7 8.f4 d5=.

6.ab5 Ra1 7.Ba1 d5 8.c4 dc4 9.Bc4 Be7 10.Nf3 Nbd7 11.0–0 Bb7 12.d4 0–0 13.Be2 Ne4 14.Nbd2 Bf6 (14...c5 15.Qc2 Nd2 16.Nd2=) 15.Ne4 Be4 16.Nd2 Bb7 17.Bf3 Qa8 18.Qc2 Bf3 19.Nf3 Qa4 1–0. GuestGDVQ – GuestXSQS, freechess.org, 2017.

6.ab5 Ra1 7.Ba1 d6 8.c4 (8.Nf3 Be7=) 8...c6 (8...Bb7 9.Nf3=) 9.Nf3 (9.bc6 Nc6 10.Nf3 Be7=) 9...e5 (9...cb5 10.cb5 e5 11.Be2=) 10.d4 (10.bc6 Be7=) 10...ed4 (10...e4!? 11.Nfd2 cb5=) 11.Bd4+= c5 12.Bb2 (12.Bc3 Bb7+=) 12...d5 (12...Be7 13.Bd3+=) 13.Bf6+/– Qf6 14.Qd5 Bd6 (14...Qb2 15.Qe5 Qe5 16.Ne5+/–) 15.Bd3 0–0 (15...Qe7 16.Qg5 Qg5 17.Ng5+/–) 16.Ng5 g6 17.Ne4 Qb2 18.Qd6 (worse is 18.Nd6 Qc1 19.Ke2 Qh1 20.Nc8 Rc8=) 18...Qc1 19.Ke2 Qh1 (better is 19...Bg4 20.f3 Qh1 21.Nf6 Kg7 22.Ng4 Qg2 23.Nf2 Qg5+–) 20.Nf6 Kg7 21.Qe5 Do you see the mate threat? (21.Qb6?! Nd7 (worse is 21...Qh2 22.Qc5 Qh4 23.Ne4+/–) 22.Nd7 Bd7+=) 21...Qg2 (21...Kh6 22.Qb8 Qg2 23.Qb6 Bg4 24.Ng4 Qg4 25.Ke1 Qg5+–) 22.Be4 Qh3 (22...Qe4 23.Ne4 Kh6 24.Qf4 Kg7 25.Qf6 Kg8 26.Qb6 Bf5+–) 23.Ne8 Kh6 24.Qg7 (24.Qg7 Kh5 25.Nf6 Kg5 26.f4 Kh4 27.Qh7) 1–0. Kern – Hove, Hessen clubgame, 1997.

6.ab5 Ra1 7.Ba1 Be7 8.Nf3 0–0 9.d3 c5 10.Be2 d5 11.0–0 Bd7 (11...Nbd7 12.Nbd2=) 12.c4 Bc8 13.Nbd2 Bb7 14.Qc2 h6 15.Bb2 Nbd7 16.Ra1 Qc7 17.cd5 Nd5 18.Ra7 Ra8 19.Ra8 Ba8 20.Qa4 Qb7 (20...Bb7 21.Nc4=) 21.Qg4 (21.e4 Nf4 22.Bf1 Qb8+=) 21...N7f6 (21...Bf6 22.d4=) 22.Qh3 Qa7 23.Qg3 Qa2 (23...Bd8 24.Ne5=) 24.Qb8 (24.Nc4!? Nc3 25.Bf1 Nb5 26.Qb8 Kh7 27.Qb6 Bf3 28.gf3+/–) 24...Kh7= 25.Nc4 Nd7?? (better is 25...Nc3! 26.Bc3 Qe2 27.Qa8 Qd3=) 26.Qe8+– Bf6 27.d4 Qa7?? 28.Bd3 g6 29.Qf7 Bg7 30.Bg6 Kh8 31.dc5 bc5 32.Qg7 (32.Bg7?!=) 1–0. Trkn – guest4515, ICC, 2004.

6.ab5 Ra1 7.Ba1 Be7 8.Nf3 c6 9.c4 (9.Nc3 cb5 10.Nb5 Nc6+=) 9...0–0 (9...cb5 10.cb5 d5 11.Be2=) 10.Be2 (10.Nc3 Bb7=) 10...Qc7 (10...cb5 11.cb5 Bb7 12.0–0=) 11.0–0 d5 (11...cb5 12.cb5 Bb7 13.Qc1+=) 12.d4 (12.Be5 Bd6 13.Bf6 gf6+=) 12...c5 (12...cb5 13.cb5 Nbd7 14.Qb3=) 13.Nbd2 (13.dc5 Qc5 14.Bd4 Qc7+=) 13...cd4 (13...Nbd7 14.dc5 Nc5 15.Be5=) 14.ed4 (14.Bd4 Bb7+=) 14...dc4 15.Nc4 Bb7 16.Qb3 (16.Qd2 Bf3 17.gf3 Nbd7+=) 16...Rc8 (16...Nbd7 17.Nfe5+=) 17.Rc1 (17.Nfe5 Nbd7=) 17...Bd5 (17...Qf4 18.Bb2 Nbd7 19.Nfd2+=) 18.Bb2 (18.Nfe5 Nbd7=) 18...Qf4 (18...Nbd7 19.Qd1 Qf4 20.Nce5=) 19.Qd1 (19.Nfe5 Nbd7 20.Nc6 Bc6 21.bc6 Rc6=) 19...Nbd7 20.Ne3 (20.Nce5 Re8=) 20...Rc1 21.Qc1 (21.Bc1 Qc7=) 21...Qe4 (21...Bb7 22.g3 Qb8 23.Ba3 Ba3 24.Qa3=) 22.h3 (22.Qc8 Nf8+=) 22...h6 (22...Bb7 23.Qc7 Qb1 24.Nd1 Bf3 25.Bf3+=) 23.Ne1 Qg6 (23...Bf8 24.Bd3 Qf4 25.Nd5 Nd5 26.Nf3+=) 24.Qc8 (24.Nd5 Nd5 25.Bd3 Qh5+/–) 24...Bf8 (24...Nf8 25.Nd3+=) 25.Ba3 (25.Nd5 Nd5 26.Bd3+/– (worse is 26.Qd7 Qb1 27.Bf1 Qe1=)) 25...Qb1= 26.N3c2 (26.Kf1 Ne4 27.Bd3 Qa2=) 26...Be4 (26...g6 27.Bf8 Nf8 28.Qc3+=) 27.Kh2 Bc2 (27...Qb3 28.Bc4 Qa4 29.Bd3=) 28.Nc2 Qa2 (28...g6 29.Bd6=) 29.Bf8 (29.Bf3 g5=) 29...Nf8= 30.Bf3 (30.Qc4 Qb2=) 30...Qb3+= 31.Qc6 N8d7 (31...Qd3 32.Kg1+=) 32.Ne3= Qb2 33.d5 Qf2 (33...ed5 34.Nd5 Qf2 35.Qc8 Kh7 36.Nf6 Nf6 37.Qf5 Kg8 38.Qc8 Kh7 39.Qf5 Kg8 40.Qc8 Kh7=) 34.de6 fe6 (34...Ne5 35.Qa8 Kh7 36.ef7 Nf7 37.Nd5=) 35.Qe6+= Kh7 (35...Kh8 36.Qe7 Qb2 37.Bc6=) 36.Nd5 Attacks the isolani on b6 36...Nd5?? (36...Qd4 37.Qd6 Qf2 38.Qb4+=) 37.Qd5?? (better is 37.Qe4 g6 38.Qd5+–) 37...Nf6= 38.Qf5 Kh8 39.Qc8 (39.Qe5 Kg8+=) 39...Kh7= 40.Qf5 Kh8 41.Qe5 Kh7 (41...Kg8 42.Be2=) 42.Bc6 (42.Be2 g5+=) 42...Kh8 (42...h5 43.Bd5=) 43.Qg3 Qc5 (43...Qd4 44.Qf3=) 44.Qf4 Kh7 45.Qf3 (45.g3 Kg6=) 45...Qe5 (45...Qd6 46.Kh1=) 46.Qg3 (46.g3 Qd4=) 46...Qc5 (46...Qd4 47.Qc7=) 47.Qf4 (47.Qe1 h5=) 47...Kh8 (47...h5 48.g3=) 48.h4 (48.g4 Kg8=) 48...Kh7 49.Kh3 Kh8 (49...h5 50.Qf3=) 50.Qf3 (50.g3 Kh7=) 50...Kh7 (50...Qe5 51.Qd3=) 51.Qd3 (51.g4 Kg6=) 51...Kh8 (51...g6 52.g3=) 52.Bf3 (52.g3 Kg8=) 52...Qf2 (52...h5 53.g3=) 53.Qd6 (53.g3 Qg1=) 53...Qe3 54.h5 (54.Qc6 Kh7=) 54...Kh7 (54...Nh5 55.Qf8 Kh7 56.Qf5 g6 57.Qf7 Ng7 58.g4–/+) 55.Qg3 (55.Kh2 Qg5=) 55...Kh8 (55...Qe8 56.Qc7 Qb5 57.Qc2 Kg8 58.Qa2 Kh8 59.Qa8 Kh7 60.Be4 Ne4 61.Qe4 Kg8 62.g4+=) 56.Qg6 (56.Qb8 Kh7=) 56...Qc5 (56...Qe5 57.Qd3+=) 57.Bc6 (57.Qd3 Nh5 58.Qd8 Kh7 59.Qd3 g6 60.Qd7 Ng7=) 57...Qh5+= (worse is 57...Nh5 58.Qe8 Qf8 59.Qf8 Kh7 60.Be4 g6 61.Qf7 Kh8 62.Bg6 Nf4 63.Qf4 Kg7 64.Qf7 Kh8 65.Qf8) 58.Qh5 Nh5 59.Kh4 (59.Kg4!? g6 60.Kf3+=) 59...Nf6–/+ 60.g4 (60.Kg3 g5 61.Bf3–/+) 60...Kg8?? (better is 60...g5 61.Kg3 Kg7–+) 61.g5= hg5 62.Kg5 Kf7 63.Bg2 (63.Kf5 Ke7=) 63...Nh7 (63...g6 64.Kf4+=) 64.Kf5= Nf6 65.Ke5 (65.Kg5 g6+=) 65...Ke7 66.Bh3 (66.Bf3 Ne8=) 66...Kd8 (66...g6 67.Be6=) 67.Kd6= Ne4 68.Kc6 Nc3 69.Kb6 Nb5 70.Kb5 Ke7 71.Kc4 Kf6 72.Kd4 Kg5 73.Ke4 Kf6 74.Kf4 Kg6 75.Kg4 Kf6 76.Bf1 Ke5 77.Bd3 Kd4 78.Bg6 Ke5 79.Kg5 Kd4 80.Kf5 Kc5 81.Ke6 Kd4 82.Kf7 Ke5 83.Kg7 ½–½. Levin,Anatoly (1950) – Illes,Sandor (1770), Internet Section, 2003.

5.a4 Bb7

6.Nf3 (---> 4.e3 Bb7 5.Nf3 a6 6.a4).

6.f4 Bb4 7.Nf3+=.

6.f4 g6 7.Nf3= Bg7 8.Be2 0–0 9.0–0 d5 10.c4 (10.Nc3 c5=) 10...Nbd7 (10...c5 11.cd5 Bd5 12.Nc3=) 11.Na3 (11.cd5 Nd5 12.Bg7 Kg7=) 11...Nc5 (11...c5 12.bc6 Bc6 13.Nd4=) 12.Nc2 (12.d4 Nce4=) 12...a5 (12...Nb3!? 13.Rb1 dc4–/+) 13.Ncd4 (13.d4 Nce4+=) 13...dc4 14.Bc4 Nfd7 (14...Nd5 15.Qc1=) 15.Qc2 (15.d3 Nf6+=) 15...Qf6 (15...Nf6 16.Ne5 Nd5 17.Ndc6+=) 16.Rab1+/– With the decisive threat Nc6 16...Qd8 17.Be2 Bd5 18.Bc4 (18.d3 f5+/–) 18...Nb8 (18...Bb7!?=) 19.d3 (19.Bd5 Qd5 20.Ba3 Rd8+/–) 19...Qd6 (19...Bc4 20.Qc4 Qd5 21.Qc2+=) 20.g3 (20.Rbc1 Bc4 21.Qc4 Rd8+=) 20...f5 (20...Rc8 21.Ne5+=) 21.Nd2 (21.Ne5 Nbd7 22.Ndc6 Nb8+=) ½–½. Kucharkowski,Jens – Usbeck, Freital, 1982.

5.c4 ab5

6.cb5 Bb7 7.Nf3 Bd5 8.Nc3 (8.Bd3+=) 8...Bb4 (8...Bb7!?+=) 9.Nd5+/– ed5 10.Qb3 (10.Bd3 0–0+/–) 10...Bc5 (10...Bd6 11.Nd4 Be5 12.Rc1+/–) 11.Bd3 Qe7 (11...c6 12.Ne5+/–) 12.g4! 0–0 (12...Ng4 13.Bg7 Pinning (13.Bg7 Deflection)) 13.g5 Ng4?? (better is 13...Nh5+/–) 14.h3+– Ne3 15.fe3 (15.de3 c6+–) 15...d4 (15...c6 16.Kf2+–) 16.Nd4 (worse is 16.Bd4 Bd4 17.Nd4 Qg5+–) 16...Qg5 (16...Bd4 17.Bd4 Qg5+–) 17.Nf5 g6 (17...Ra5+–) 18.h4 Qg2 19.Nh6 1–0. Lavendel – Flamma, internet free game, 2018.

4.e3 Bb7

5.a4 a5 6.Qe2 (6.Nf3 Bb4=) 6...Be7 7.Nf3 d6 (7...0–0 8.Nc3=) 8.Nc3 (8.Na3 0–0+=) 8...c5 (8...Nbd7 9.Qd1=) 9.g3 (9.Rd1 d5=) 9...Nbd7 10.Bg2 Qc7 (10...0–0 11.0–0=) 11.0–0 (11.e4 0–0=) 11...h5 (11...0–0 12.Rfe1=) 12.Ng5 (12.Nh4 Bg2 13.Ng2 d5=) 12...Bg2 13.Kg2 d5 Black prepares the advance c4 (13...h4 14.e4=) 14.f4 c4 (14...h4 15.g4=) 15.f5 (15.e4 de4 16.Nge4 0–0–0=) 15...e5+= 16.h4 (16.Rad1 h4+=) 16...e4 (16...0–0 17.Rad1+=) 17.d3 Bd6 (better is 17...ed3!? 18.cd3 Qb7=) 18.de4 (18.dc4 Be5 19.Nd5 Nd5 20.Be5 Qc4 21.Qc4 Ne3 22.Kh3 Nc4 23.Bg7 Rg8+–) 18...Bg3 19.Rh1 (19.Nd5 Nd5 20.ed5 Bh4+=) 19...de4= 20.Nce4 Ne4 21.Ne4 Be5 22.Be5 Ne5 23.Rad1 Rd8 24.Rd4 (24.Kh3 Rh6=) 24...Ng4 25.Ng3 g6 (25...Qe7 26.Re4 Ne5 27.Rd1=) 26.fg6 f6? (better is 26...fg6 27.Qf3 Rh7 28.Qe4 Ne5 29.Rd8 Kd8+=) 27.Rf1 (27.Nh5 f5 28.g7 Rg8+–) 27...Rd4 (better is 27...Rg8 28.Kh3 Rg6 29.Nh5 Rd4 30.ed4 Kf7+–) 28.ed4 Qe7 (28...Kf8 29.Qe4 Qe7 30.Qa8 Qe8 31.Qe8 Ke8 32.g7+–) 29.Kh1 (better is 29.Qe7!? Ke7 30.Kh3 Rg8 31.Nh5 Rg6+–) 29...Qe2 (29...Rg8 30.Qe7 Ke7 31.Nf5 Kf8 32.g7 Rg7 33.Ng7 Kg7 34.Re1+–) 30.Ne2 Rg8 (30...Kf8 31.Nf4+–) 31.Nc3 (better is 31.Nf4!? Ke7+–) 31...Rg6 ½–½. Fischer,HD – Marquardt,W, corr W–ch M469, 1989.

5.a4 a6 6.Nf3=.

5.a4 d5 6.f4 c5 7.Nf3 Nbd7 8.Be2 Bd6 9.c4 0–0 10.0–0 Re8 11.Ne5 d4 12.ed4 cd4 13.Bd4 Bc5 14.Bc5 bc5 15.d4 Qc7 16.Nd2 cd4 17.Bf3 Nc5 18.Bb7 Qb7 19.Ra3 Rad8 20.Nb3 Qb6 21.Nd4 Ncd7 22.Nec6 e5 23.fe5 Ne5 24.c5 Qc5 25.Qc1 (25.Nd8? Rd8 (25...Qa3?! 26.N8c6=) 26.Qc1 Qd4 27.Qe3 Ne4–+) 25...Nc4 26.Rd3 Rd5 27.Qc3 Ree5? (better is 27...Ne4 28.Qc2 f6=) 28.Ne5+– Re5 29.Kh1 h6 30.Nf3 Rf5 31.Rc1 Ne4 32.Rd8 (32.Rd8 Kh7 33.Qd4 (33.Qc4?? Nf2 34.Kg1 Nh3 35.Kh1 Qg1 36.Ng1 Nf2) 33...Qd4 34.Rd4+– (34.Nd4?! Rf2+–); 32.Qc4?? Nf2 33.Kg1 Nh3 34.Kh1 Qg1 35.Ng1 Nf2) 1–0. Fels,Bernhard (2030) – Benassi,Aspasio (2135), WC–2014–P–00027, 2010.

5.Nc3 d5=.

5.c4 Ne4 6.Nf3 Ng5 (6...a6 7.a3=) 7.Be2 Ne4 (7...a6 8.0–0=) 8.0–0+= Ng5 (8...a6 9.a4+=) 9.d3 (better is 9.Nd4+=) 9...Be7 (9...a6 10.a4+=) 10.Nbd2 (10.Ng5!? Bg5 11.Bf3+–) 10...Bf6 (10...0–0 11.Nd4 e5 12.Nf5+=) 11.Qc2 (11.Nd4 e5 12.N4f3 Nf3 13.Bf3 c6+/–) 11...Bb2 (11...Nf3 12.Bf3 (worse is 12.gf3 Bb2 13.Qb2 Rg8+=) 12...Bf3 13.Nf3+=) 12.Qb2 0–0 13.a4 d5 (13...a6 14.Rfb1+=) 14.Rfc1 (14.a5 ba5 15.Ra5 dc4 16.dc4 Nf3 17.Bf3 Bf3 18.Nf3 c6+/–) 14...dc4 15.dc4 Nd7 (15...a6 16.c5+=) 16.a5 Ne4? (16...c5 17.Rd1+=) 17.ab6 (better is 17.a6!? Nd2 18.ab7 (18.Qd2?! Be4+=) 18...Nf3 19.Bf3+– (19.gf3?! Rb8+=)) 17...cb6 (17...ab6 18.Ne4 Be4 19.Nd2+=) 18.Ne4 (18.Rd1 Nec5+=) 18...Be4 19.Rd1 Qc7 20.Qd4 (20.Nd2 Bb7+=) 20...Nf6 (20...Nc5 21.Qe5 Rac8 22.Qc7 Rc7 23.Rd6+=) 21.Qe5 Qb7 22.Ne1 (22.Ng5 Bg2 23.f3 h6+=) 22...Rfd8 (22...a5 23.ba6 Ra6 24.Ra6 Qa6 25.f3=) 23.Bf3 Bf3 24.Nf3 Rd1 (24...a5 25.Rd8 Rd8 26.Nd4=) 25.Rd1 h6 (25...a5 26.ba6 Qa6 27.Qd4=) 26.Nd4 (26.Qd4 a6+=) 26...Rd8 (better is 26...a5=) 27.c5?? (27.Ra1 Rd7+=) 27...bc5 (27...Rd5 28.c6 Qc8–+ (28...Re5?? 29.cb7 Nd7 30.Ne6 Rb5 31.f4+–)) 28.Qc5= Ne4 (28...a6 29.ba6 Qa6 30.Rc1=) 29.Qc6+= Qc6 (29...Rd7 30.Rc1+=) 30.bc6 Rc8 31.Rc1 (31.Ra1 e5 32.Nf5 Rc7+=) 31...Nd6 (31...Kf8 32.f3 Nd6 33.Rc5+=) 32.f4 (32.Rc5 Kf8+=) 32...Rc7 (32...a5 33.Kf2+=) 33.Kf2+/– a5 (33...Kf8 34.Kf3+=) 34.Ra1 Nc4 (34...Nf5!? 35.Nf5 ef5 36.Ra5 g6+/–) 35.Ra4+– Nd2 (35...Nd6 36.Ra5 Kf8 37.g4+–) 36.Ra5 Ne4 (36...Kf8 37.Ra4 Ke7 38.Rb4+–) 37.Ke2 (37.Kf3 Nd2 38.Ke2 Ne4+–) 37...Nc3 (37...Kf8 38.Kd3 Nf6 39.e4+–) 38.Kd3 (38.Kf3 Kf8+–) 38...Nd5 39.Kc4 (39.Rb5 Ra7+–) 39...Ne3 40.Kc5 Ng2? (40...Rc8 41.Nb5 Nd5 42.Nd6+–) 41.Ne2?? (41.Ra8 Kh7 42.Kd6 Rc6 43.Nc6 Nf4+–) 41...Kf8? (better is 41...Rc8 42.Kd6 Ne3+/–) 42.Kd6 (42.Ra8 Ke7+–) 42...Rc8 43.Kd7 (43.Kd7 Re8 44.c7+–) 1–0. jaddwarrior (2055) – johniel (1940), ChessWorld.net, 2016.

5.c4 g6 6.Nf3 Bg7 7.d3 0–0 8.Nc3 d5 9.Be2 dc4 10.dc4 Qe8 (10...a6 11.Qc2=) 11.0–0 Nbd7 12.Qc2 Nc5 13.Na4 (13.Rfd1 a6=) 13...Nfe4 (13...Be4 14.Qd1 Rd8 15.Bd4 Bf3 16.Bf3–/+) 14.Nd4 (14.Bg7!? Kg7 15.Nc5 Nc5 16.Rfd1+=) 14...Na4= 15.Qa4 Nd2 (15...a6 16.Qc2=) 16.Rfd1+= Ne4 17.f3 Nc5 18.Qc2 e5 19.Nb3 e4 (19...Nb3 20.ab3 c5 21.bc6 Qc6 22.Qd2+=) 20.Nc5 bc5 (20...ef3 21.Rd3 Bb2 22.Qb2 f2 23.Kf2 bc5 24.Qc3+=) 21.Bg7+/– Kg7 22.Qc3 Kg8 23.Qf6 (better is 23.f4!?+/–) 23...ef3+= 24.Bf3 Bf3 (better is 24...Qe3!? 25.Kf1 Bf3 26.Qf3 Qf3 27.gf3 Rfd8+=) 25.Qf3+= (worse is 25.gf3 Qe3 26.Kh1 Rae8–/+) 25...Qe6 (25...Qe5 26.Rab1+=) 26.Rd5+/– c6 27.bc6 (27.Rc5 cb5 28.cb5 Rfe8+/–) 27...Qc6+= 28.Rad1 Qa4 29.Qe2 Rae8 30.Kf2 (30.Rb1 Qa5+=) 30...Qb4 (30...Re4 31.Rc5 Re3 32.Qe3 Qd1 33.Re5=) 31.Qc2 Qa3 The isolani on e3 becomes a target 32.R1d3 Qa5 33.Rd7 (33.Qd2 Qb6=) 33...Re6 34.Rb3 (34.Qb3 Rfe8=) 34...Rf6 35.Kg3?? (35.Ke2 Re8=) 35...Qa6?? (better is 35...Qe1 36.Kg4 h5 37.Kg5 Rf5 38.Qf5 gf5 39.Ra7 Qf2–+) 36.Rbd3= Qe6 37.R7d5 (37.Ra7 Qe5 38.Kh3 g5–+) 37...Rf5 0–1. GuestHVSK – vkumarmgg, freechess.org, 2017.

5.d4 Be7 6.Nd2 0–0 7.Ngf3 d6 8.Bd3 Nbd7 9.h3 (9.0–0 a6 10.a4 Nd5+=) 9...Rc8 (9...e5 10.e4=) 10.c4 c5 11.dc5 (better is 11.bc6!? Bc6 12.0–0+=) 11...Nc5+= 12.Bc2 Nfe4 13.Nb3 (13.Ne4 Ne4 14.Be4 Be4+=) 13...e5 (13...Na4 14.Bd4 e5 15.Be4 Be4 16.Nbd2 Bf3 17.Nf3 Rc4 18.Nd2–/+) 14.a4 f5 15.Nc5 bc5 (15...Rc5 16.0–0 Rf6+= (worse is 16...Rc4 17.Bb3 d5 18.Bc4 dc4 19.Rc1+/–)) 16.Rg1? (16.0–0!?=) 16...Kh8 (16...Qa5 17.Nd2–/+) 17.a5 f4 18.Qe2 Bf6 (18...fe3!? 19.Qe3 Ng5 20.Ng5 Bg5+=) 19.a6= Ba8 20.Be4 (20.0–0–0!? fe3 21.Qe3 Nf2 22.Qf2=) 20...Be4–/+ 21.Bc3 Re8 22.Ba5 Qd7 23.Nd2 Ba8 (23...Bf5 24.e4 Be6 25.Qd3–/+) 24.e4+= d5 (better is 24...Kg8+=) 25.f3?? (better is 25.cd5 Rb8 26.Rb1+/–) 25...dc4 (better is 25...de4 26.0–0–0 ef3 27.gf3 e4 (27...Qh3?! 28.Ne4–/+) 28.Ne4 Qh3–+) 26.Nc4?? (better is 26.Qc4 Rb8 27.Rb1–/+) 26...Qd4–+ 27.Ra3 Qg1 28.Kd2 Qd4 29.Qd3 Bd8 30.Qd4 cd4 31.Nd6 Be7 32.Ne8 Ba3 33.Nc7 Bb2 34.Na8 Bc3 35.Bc3 dc3 36.Kc2 Ra8 37.Kc3 0–1. Ioan,Cesar – Barbu,George Emilian, Petre Seimeanu Memorial, 2002.

5.Nf3 d5 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7).

5.Nf3 Nd5 6.c4 Nb4?? (better is 6...Nf6=) 7.a3+– a5 (7...Bf3 8.gf3 (8.Qf3?! Nc2 9.Kd1 Na1 10.Qa8 Nb3+/–) 8...N4c6 9.bc6 Nc6 10.Rg1+–) 8.ab4 ab4 9.Ra8 (9.Ra8 Ba8 10.d4+–) 1–0. GuestNQKQ – GuestNSVY, freechess.org, 2017.

5.Nf3 Qe7 6.Be2 Qb4 7.Ba3 Qg4 8.0–0 (8.Bf8 Rf8 9.0–0 a6+=) 8...h5 (8...Ba3!? 9.Na3 a6+=) 9.h3 Qa4 10.Bf8 Rf8 11.Nc3 Qb4 12.Nd4 Qd6 13.Bh5 Rh8 (13...c5 14.Bf3 Qc7 15.Bb7 Qb7 16.Nb3+–) 14.Bf3 g5?? (14...Nd5+–) 15.Bb7 Nc6 (15...g4 16.Ba8 gh3 17.gh3 Rh3 18.f4+–) 16.bc6 Rd8 17.f4 g4 18.hg4 e5 19.Ndb5 Qc5 20.Nc7 Kf8 21.Na6 Qa5 22.c7 Re8 23.g5 Nh5 24.Qg4 ef4 25.Qd7 fe3 26.Qf7 1–0. Janek – tscjs, internet, 2018.

5.Nf3 Rg8 6.c4 Bb4 7.Be2 d6 8.0–0 c5 9.Nc3 Nbd7 10.d4 Bc3 11.Bc3 Ne4 12.Bb2 Qc7 13.a4 g5 14.Nd2 g4 15.Ne4 Be4 16.a5 Ke7 (16...ba5 17.Bg4 Bg2 18.Kg2 h5=) 17.ab6 Nb6 18.f3 (better is 18.dc5 Qc5 19.Bd4+/– (worse is 19.Bg4 Nc4 20.Bd4 Qb5+=)) 18...Nc4? (18...gf3 19.Bf3 Nc4 20.Be4 Nb2 21.Rf7 Kd8+–) 19.fe4 (better is 19.Bc4!? gf3 20.g3+–) 19...Ne3+/– 20.Qd2 Nf1 21.Rf1 Raf8 22.dc5 dc5 23.Bf6 Ke8 24.Rd1 (24.Rd1 Qh2 25.Kh2 g3 26.Kh3 c4 27.Qd7) 1–0. Margraf – Bolln, corr, 1989.

5.f4 g6 6.Nf3 Bg7 7.Be2 (7.g4 0–0 8.g5 Ne4 9.Bg7 Kg7=) 7...0–0 8.0–0 c5 9.d3 (9.Nc3 d6=) 9...d5 10.Ne5 Nbd7 11.Nd2 Ne5 (11...a6 12.a4=) 12.fe5 Ne8 (12...Nd7 13.Nf3=) 13.d4 (13.Nf3 Qd7 14.a4 a6=) 13...f6 14.ef6 Nf6 15.c4 Qe7 (15...a6 16.dc5 bc5 17.a4=) 16.Qb3 Nd7 17.Bg4 Nf6 (17...cd4 18.ed4 dc4 19.Qc4=) 18.Be2 dc4 (18...Qd6 19.Qd3=) 19.Bc4+= Bd5 20.dc5 bc5 21.Rad1 (21.e4 Bc4 22.Qc4 Bh6=) 21...Rad8 22.h3 (22.Qc2 Rd7=) 22...Bc4 23.Nc4 Rd1 24.Rd1 Ne4 25.Bg7 Kg7 (25...Qg7 26.Nd6 Nd6 27.Rd6=+) 26.Ne5 Kh8 (26...Qf6 27.Ng4 Qf7 28.Qb2 Nf6 29.Rf1+/–) 27.Qc2+/– Ng3 28.Qc4 Qf6 29.Ng4 (29.Qc5?! Qf2 30.Kh2 Nf1 31.Kh1 Ne3=) 29...Qe7 (29...Qg5 30.Rd7+/–) 30.Qc3 e5 31.Qe5 Qe5 32.Ne5 Ne2 33.Kh2 Rb8 34.Rd7 Nc3 35.Nf7 (35…Kg7 36.Nd6 (36.Ra7?! Nb5 37.Rd7 Kf6+/–) 36...Kh6 37.a4 Na4 38.Ra7+–) 1–0. Trigance,Eric – Pal,Antal, corr ICCF TT–4–90 SF, 1995.

5.Nh3 a6 6.f3+=.

5.Nh3 c5 6.c4 (6.Nf4 a6=) 6...d5 7.Be2 (7.cd5 Nd5 8.Nc3 Nf6=) 7...Nbd7 (7...dc4 8.0–0=) 8.0–0 (8.cd5 Nd5 9.0–0 Bd6=) 8...Bd6 9.f4 0–0 10.Qe1 (10.Bf3 Qc7=) 10...Qe7+= 11.Na3 d4 (11...a6 12.ba6 Ba6 13.Qg3+=) 12.Bf3 (12.ed4 Rfd8=) 12...Bf3+= 13.gf3 (13.Rf3 e5+=) 13...e5 (13...Rfd8 14.e4 Nh5 15.e5–/+) 14.Qh4 (14.fe5 Ne5 15.ed4 Nd3 16.Qe7 Be7+=) 14...ef4 (14...a6 15.Rfe1–/+) 15.ed4 (15.Nf4 Qe5+=) 15...cd4 16.Rae1 Be5 17.Nc2 (17.Nf4 Qb4 18.Nd3 Qd2+=) 17...Qd6 (17...Rfc8 18.d3 Qd6 19.Ba3–/+) 18.d3 (18.Ba3 Nc5 19.Nb4 d3+=) 18...Rfe8 (18...a6 19.Ba3 Nc5 20.ba6 Ra6 21.Nf2–/+) 19.Re2 (19.Bc1 a6 20.ba6 Ra6–/+) 19...Nc5 20.Ba3 (20.Nb4 Nfd7 21.Rfe1 Na4+=) 20...Nfd7 (20...a6 21.ba6 Ra6 22.Nf2–/+) 21.Rg2 (21.Qh5–/+) 21...Bf6 (better is 21...a6!?–/+) 22.Qf4+= Qf4 (22...Be5 23.Qh4+=) 23.Nf4= Be5 (23...h6 24.Bc5 bc5 25.Nd5=) 24.Nd5 White fights for the Initiative 24...Nd3 25.f4 Bb8 (25...Bf6!?=) 26.Nd4+/– N3c5 27.Nf5 (27.Rd1 Kf8+/–) 27...g6+= 28.Bb2 (28.Bc5 bc5 29.Rd1 Kf8=) 28...Re4= 29.Nh6 Kf8 30.f5 f6?? (30...Ke8 31.Nf7! Rc4 32.fg6 hg6 33.Rg6 Nf8+–) 31.fg6 Kg7 (31...Bh2 32.Rh2 hg6 33.Bf6 Ne6 34.Be7 Ke8+–) 32.Nf5 Kg8 33.Nde7 Re7 34.Ne7 Kg7 35.gh7 Kh7 36.Rf3 (36.Rf3 Bh2 37.Kh2 a6 38.Rh3) 1–0. Bulcourf,Carlos (2270) – Della Morte,Pablo (2300), Circuito Nacional, 2004.

5.c4 a5

6.d4 d5 7.Nf3 dc4 8.Bc4 Nbd7 9.Nbd2 Nd5 10.0–0 Be7 11.a4 g5 12.Qb3 g4 13.Ne5 Ne5 14.de5 Nb4 15.Rfd1 Qc8 16.f4 gf3+= 17.Nf3 h5 18.Nd4 h4? 19.Ba3 h3 20.g3 Rg8? 21.Rf1?? Rg5? 22.Bb4 Bb4 23.Rf4?? Re5+= 24.Raf1 f5? 25.Be6+– Qd8 26.Bf5 Bg2?? 27.R1f2 Be1?? 28.Qg8 Ke7 29.Qg7 Kd6 30.Rc2 Re3 31.Be4!! Be4 32.Re4! Re4 33.Rc6 Kd5–/+ 34.Ne2 Re2?? 35.Qg5 Re5 36.Qd2 Bd2 (36...Bd2 37.g4 Re1 38.Kf2 Qh4 39.Kf3 Rf8 40.Rf6 Rf6) 0–1. carocan (1705) – cot, kurnik, 2011.

6.Nf3 d6 7.d4 Nbd7 8.Bd3 Qe7 9.0–0 h6 10.Nbd2 g5 11.Qc2 g4 12.Ne1 h5 13.Nb3 e5 14.a4 ed4 15.ed4 d5 16.c5!+– bc5 17.dc5 c6 18.Bd4 Rg8 19.Qc3 Ne4 20.Qb2 f5 21.Nc2 0–0–0? 22.Na5+– Nec5 23.Bf5 Bg7 24.bc6 Bd4 25.cb7 Kb8 26.Qd4 Nb7 27.Nc6 (27.Nc6 Kc8 28.Ne7 Kb8 29.Ng8 Rg8 30.Bd7+–) 1–0. carocan (1705) – cot, kurnik, 2011.

6.Nf3 d6 7.Be2 Nbd7 8.0–0 e5 9.d4 ed4 10.Nd4 Be7 11.Nd2 Nc5 12.Bf3 Nfe4 13.N2b3 f5? 14.Qc2 Qd7 15.Nc5 dc5 16.Nc6 Bc6 17.bc6 Qc6 18.Bg7 Rg8 19.Be5 0–0–0 20.Rad1 Qg6 21.Rd8 Rd8 22.Rd1 Bd6 23.Bd6 Nd6 24.Rd5 Rf8 25.Qa4 Qf6 26.g3 h5 27.Qc6 h4+= 28.Kg2 h3 29.Kh3+/– Rh8 30.Kg2 Qh6?? 31.h4 Qg7 32.Rd6 (32.Rd6 Qg3 33.fg3 Rh4 34.Qe8) 1–0. carocan (1790) – cot, kurnik, 2011.

6.f4 c5 7.Nf3 Be7 8.Be2 h6 9.0–0 d6 10.d4 Nbd7 11.Nbd2 Qc7 12.Rc1 0–0–0 13.Qc2 cd4 14.Bd4 Nc5 15.Nb3 Rhg8 16.Nfd2 Nfd7 17.Bf3 d5? 18.cd5+– ed5 19.Qf5 f6 20.Nc5 Bc5 21.Nb3 Kb8 22.Bd5 Bd5 23.Qd5+– Qb7 24.Qb7 Kb7 25.Nc5 Nc5 26.Bc5 bc5 27.Rc5 Kb6 28.Rfc1 Rd6? 29.a4+– Rgd8 30.Rc6 Rc6 31.Rc6 Kb7 32.Ra6 Rd3 33.Kf2 Rd2 34.Kf3 Rd5 35.Ra5 Kb6 36.Ra6 Kc5 37.b6 g5 38.b7 (38.b7 Rd8 39.Ra8+–) 1–0. carocan (1865) – cot, kurnik, 2011.

5.c4 a6

6.a4 a5 7.d3 d6 (7...Bb4 8.Nc3+=) 8.Nd2 (8.Nf3 e5=) 8...Nbd7 (8...d5 9.cd5 Nd5 10.Rc1=) 9.Ngf3 Be7 10.Be2 0–0 11.0–0 c5 (11...Re8 12.d4=) 12.bc6+= Bc6 13.Nd4 Bb7 14.Bf3 d5 15.Nb5 Nc5 (15...Rc8 16.Rb1=) 16.Qe2 (16.Bf6 Bf6 17.d4 Na6+=) 16...Bc6 (better is 16...Rc8+=) 17.Rac1?? (17.Bf6 Bf6 18.d4 Ne4+=) 17...Bb5 (17...Na4 18.Bf6 Bf6 19.d4–/+) 18.cb5 (18.ab5 dc4 19.d4 Nd3 20.Ba8 Nc1 21.Rc1 Qa8 22.Nc4 Qb7=) 18...Rc8 (18...Na4 19.Bf6 Bf6 20.d4–/+) 19.d4 (19.Ra1 Bd6=) 19...Nce4 (better is 19...Na4 20.Ba1 Qd7–/+) 20.Rc8= Qc8 21.Rc1 Qb7 (21...Qb8 22.Be4 de4 23.Rc6+=) 22.Be4 Ne4 (22...de4 23.Rc6+=) 23.Ne4 de4 24.Qc4 (24.Qc4 Rb8 25.Qc6+=). Mroz,Antoni – Witkowski,Leszek, corr Poland, 1988.

6.a4 a5 7.Nf3 Be7 8.Be2 0–0 9.d3 (9.0–0 d5=) 9...d5 10.Nbd2 Nbd7 11.d4 (11.0–0 c6=) 11...Bb4 (11...dc4 12.0–0=) 12.0–0 Qe7 (12...c5 13.bc6 Bc6 14.Ba3=) 13.Qc2 Rac8 14.h3 (14.Bc3 Bc3 15.Qc3 c5=) 14...c6 15.Qb1 (15.Bc3 Bc3 16.Qc3 c5=) 15...cb5+= 16.cb5 Ne8 (16...Ne4 17.Ne4 de4 18.Ne5+=) 17.e4 (17.Qd3!?=) 17...Nd6 18.e5 Nf5 (18...Nc4 19.Bc1+=) 19.Bd3= g6 (19...f6 20.Bf5 ef5 21.e6 Qe6 22.Re1=) 20.g3 (20.Bf5!? gf5 21.Qd3=) 20...Nd4?? (better is 20...f6+=) 21.Bd4+– 1–0. GuestFNBV – shianguest, freechess.org, 2017.

6.a4 Bb4 7.Nf3+=.

6.Nc3=+.

6.Nf3 ab5 7.cb5 Bb4=.

6.Nf3 ab5 7.cb5 d5 8.Qc2 Bd6 9.d4 0–0 (9...c6 10.Bd3 (10.Nc3 0–0 11.Bd3 Qe7 12.0–0 Rc8 13.a4 Nbd7=) 10...0–0 11.Nc3 Qe7 12.0–0 Rc8 13.a4 Nbd7=; 9...Nbd7 A) 10.Be2 0–0 (10...Rc8 11.Ba3 Ne4 12.0–0 0–0 13.Qd3 Qf6=) 11.0–0 Qe7 12.Rc1 Rfc8 13.Ne5 Nb8=; B) 10.Nc3 Rc8 11.Bd3 0–0 12.0–0 Qe7 13.Qe2 e5=; C) 10.Bd3 Rc8 11.Qb3 0–0 12.0–0 c5 13.bc6 Bc6=; 9...c5 10.dc5 (10.bc6 Nc6 11.Bb5 0–0 12.0–0 Qe7 13.Nc3 Rfc8+=) 10...bc5 11.Be2 Nbd7 12.0–0 0–0 13.a4 e5=) 10.Bd3 Qe7 (10...c6 11.Nc3 Qe7 12.0–0 Rc8 13.a4 Nbd7=; 10...c5 11.dc5 bc5 12.Ng5 g6 13.0–0 e5=) 11.0–0 (11.Ng5 h6 12.Nh7 Rc8 13.Nf6 Qf6+=) 11...c5 (11...Rc8 12.Nc3 c6 13.a4 Ra5=) 12.dc5 Bc5 13.Nbd2 (13.Bf6 Qf6+=) 13...Rc8 14.Qb1 Ba3 15.Rc1 Nbd7 16.Rc8 Rc8 17.Nb3 Ne4 18.Ba3 Qa3 19.Nfd4 Ne5 20.Bc2 g6 21.f4 Nc4 22.Be4 de4 23.Qc1 Qa4 24.Qe1 Nd6 25.Qe2 Bd5 26.Rd1 Rc3 27.f5 ef5 (27...Bb3 28.ab3 Qa5 29.fe6 fe6 30.Qf1+/–; 27...Nf5?! 28.Nf5 gf5 29.Qe1+=) 28.Nf5 Nf5 (28...gf5?! 29.Rd5 Qc4 30.Qc4 Nc4 31.Rd8 Kg7 32.Rc8=) 29.Rd5 Qb4 (29...Ne3?! 30.Rd8 Kg7 31.Rd4=; worse is 29...Re3 30.Rd8 Kg7 31.Qb2 Kh6 32.Qd2=) 30.Qd2 Kg7 (30...Ne3?! 31.Rd4 Nc4 32.Rd8 Kg7 33.Qd4 Kh6 34.Qe4=) 31.h3 Qc4 32.Rf5 gf5 33.Qd6 Qc7 34.Nd4 Qd6 (34...Re3 35.Nf5 Kg8 36.Qc7 h6 37.Qd8 Kh7 38.Qf6 Re1 39.Kf2 Rf1 40.Kf1 e3 41.Qg7) 35.Nf5 Kf6 36.Nd6 Re3 0–1. Perlitz,Heiko – Woelfelschneider,Peter, TT–11.02 ETC, 2004.

6.Nf3 ab5 7.cb5 Be7 8.a4 0–0 (8...c6 9.Be2 Bb4 (9...d5 10.0–0 0–0 11.Nc3 Qc7 12.d4 Rc8 13.Bd3 Nbd7 14.bc6 Bc6=; 9...0–0 10.0–0 Qc7 11.Qc2 Rc8 12.Rc1 Ra5 13.d4 d6 14.Nbd2 Qd8=; 9...d6 10.0–0 0–0 11.Nc3 Qc7 12.Rc1 Rc8 13.d4 d5 14.Bd3 Qd6=; 9...Qc7 10.bc6 Nc6 11.Nc3 0–0 12.Nb5 Qb8 13.0–0 Rc8 14.Rc1 Ne4=) 10.Qb3 c5 11.0–0 0–0 12.Nc3 d6 13.d4 Qe7 14.dc5 Bc5=; 8...Ra5 A) 9.Bc4 c5 (9...d5 10.Bd3 c5 11.bc6 Nc6 12.0–0 0–0 13.Bb5 Qd6 14.Nc3 Qc7=; 9...0–0 10.Bc3 Ra7 11.0–0 d5 12.Be2 c5 13.bc6 Nc6 14.Bf6 Bf6=; 9...Bb4 10.0–0 0–0 11.Nc3 Qe7 12.d4 Ne4 13.Ne4 Be4 14.Nd2 Bg6=; 9...Ne4 10.0–0 0–0 11.Nc3 Nd6 12.Be2 Bf3 13.Bf3 Nc4 14.Bc1 d5=) 10.Bc3 Ra7 11.0–0 d5 12.Be2 0–0 13.Qc2 Nbd7 14.Rc1 Ne4+=; B) 9.Be2 0–0 (9...Nd5 10.0–0 0–0 11.Nc3 f5 12.Rc1 Bf6 13.d4 Be7 14.Ne5 Bd6+=; 9...c6 10.0–0 0–0 11.Na3 d5 12.bc6 Nc6 13.Nb5 Qd7 14.Bc3 Raa8=; 9...Bb4 10.0–0 0–0 11.Qc2 Nd5 12.Na3 Ra7 13.Rfc1 f6 14.Nc4 Be7=; 9...Ne4 10.0–0 0–0 11.Nc3 f5 12.d3 Nd6 13.Rc1 f4 14.e4 c6+=) 10.0–0 c6 11.Na3 d5 12.Qc2 c5 13.d3 Nbd7 14.Bd1 Bd6+=; C) 9.Nc3 c5 (9...0–0 10.Be2 d5 11.0–0 c5 12.bc6 Nc6 13.Nb5 Qd7 14.Bc3 Raa8=; 9...Bc5 10.Be2 0–0 11.0–0 Qe7 12.Ne5 d5 13.d4 Bd6 14.Qb3 Rc8=; 9...Bb4 10.Be2 0–0 11.0–0 Qe7 12.Rc1 Rc8 13.Ne5 d5 14.d4 c6=; 9...d6 10.d4 Nbd7 11.Rc1 0–0 12.Bd3 c5 13.bc6 Bc6 14.Bb5 Bb5=) 10.d4 cd4 11.Nd4 0–0 12.f3 Bb4 13.Nb3 Ra8 14.Kf2 Ng4+=; D) 9.Bd3 0–0 (9...Bb4 10.0–0 0–0 11.Ne5 d6 12.Nc4 Ra8 13.Qc2 Nbd7 14.Rc1 Qe7=; 9...Bc5 10.Bc3 Ra8 11.0–0 0–0 12.Bc2 Ne4 13.d4 Be7 14.Bd3 f5=) 10.0–0 Nd5 11.Nc3 Nb4 12.Be2 c5 13.d4 Bf3 14.Bf3 cd4=) 9.Be2 (9.Bd3 Ne4 (9...Ra5 10.0–0 Nd5 11.Nc3 Nb4 12.Be2 c5 13.d3 d5 14.d4 c4=; 9...Nd5 10.0–0 Ra5 11.Nc3 Nf6 12.Rc1 Bb4 13.e4 Qe7 14.Qc2 e5=; 9...c5 10.0–0 d5 11.Bc2 Nbd7 12.d4 Bd6 13.dc5 Nc5 14.Be5 Be5=; 9...d6 10.0–0 c5 11.bc6 Nc6 12.Bb5 Na7 13.Be2 Qc7 14.Nc3 Rfc8=) 10.Be4 Be4 11.d3 Bf6 12.Nc3 Bf5 13.e4 Bg4 14.h3 Bh5=; 9.Nc3 c5 (9...d5 10.d4 c6 11.Bd3 Bd6 12.0–0 Qe7 13.Rc1 Rc8 14.bc6 Nc6=; 9...Nd5 10.Be2 Bf6 11.0–0 c5 12.d4 Nc3 13.Bc3 d6 14.Rc1 Nd7=; 9...Ne4 10.Be2 Bf6 11.0–0 Nc3 12.Bc3 Bc3 13.dc3 Ra5 14.Qd4 Qe7=; 9...Ra5 10.Be2 e5 11.0–0 e4 12.Ne5 d5 13.d4 Bd6 14.Ba3 c5=) 10.d4 cd4 11.Qd4 Bf3 12.gf3 d5 13.Rg1 Nbd7 14.Qf4 Kh8+=; 9.Bc4 c5 (9...d5 10.Be2 c5 11.0–0 Bd6 12.d4 c4 13.Ba3 Ne4 14.Bd6 Qd6=; 9...Ne4 10.0–0 d5 11.Be2 c5 12.d3 Bf6 13.Qc2 Bb2 14.Qb2 Ng5=; 9...Re8 10.0–0 c5 11.bc6 Nc6 12.d3 Na7 13.Qe2 d5 14.Bb3 Nc6=; 9...Be4 10.0–0 d5 11.Be2 c6 12.d3 Bf3 13.Bf3 Qc7 14.Nc3 Bd6=) 10.0–0 d5 11.Be2 Nbd7 12.d4 Bd6 13.dc5 Nc5 14.Be5 Nfe4+=) 9...d5 (9...c6 10.Nc3 Qc7 11.0–0 Rc8 12.bc6 Nc6 13.Nb5 Qd8 14.d3 Nd5=; 9...Bb4 10.0–0 Qe7 11.Bd4 Ba5 12.Qc2 c5 13.Bb2 Rc8 14.d3 d6=; 9...Nd5 10.0–0 f5 11.Nc3 f4 12.Nd5 Bd5 13.Qc2 fe3 14.fe3 h6+=; 9...Ne4 10.0–0 Bd5 11.Nc3 Nc3 12.dc3 Be4 13.Nd2 Bg6 14.Bf3 c6=; 9...d6 10.0–0 c5 11.bc6 Nc6 12.Nc3 d5 13.d3 Bb4 14.Nb5 Qe7=) 10.Ba3 (10.d4 Nbd7= (10...c6 11.Nc3 Bb4 12.0–0 Qe7 13.Qb3 Rc8 14.Ba3 Ba3=) 11.Ba3 c5 12.bc6 Bc6 13.Be7 Qe7 14.Qb3 Ra5=; 10.0–0 c5 11.d3 Nbd7 12.Qc2 Bd6 13.Nbd2 Re8 14.Rfc1 e5=) 10...Nbd7 (10...c5 11.bc6 Nc6 12.Be7 Qe7 13.Nc3 e5 14.d4 e4+=) 11.0–0 (11.d4 c5 12.bc6 Bc6 13.Be7 Qe7 14.Qb3 Ra5=) 11...c5 (11...c6 12.d4 c5 13.Nbd2 Bd6 14.Nb3 Ne4+=) 12.d3 (12.bc6 Bc6 13.Nc3 Ne4= 14.Be7 Qe7=) 12...Ra7 (12...Bd6 13.Bb2 e5 14.Nh4 Re8+=) 13.Bb2 (13.Nc3 Qc7 14.d4 Rc8+=) 13...Qc7 14.d4 c4 (14...Rfa8+=) 15.Nc3 Bd6 (15...Bb4 16.Na2 Bd6 17.Nc3+=) 16.Ba3= Ne8 17.Bd6 Nd6 18.Nd2 f5 19.f3 (19.Qc2!?=) 19...e5+= 20.Qe1 (20.Ndb1 Re8+=) 20...f4–/+ 21.de5 Ne5 22.ef4 Rf4 23.g3 Rf8 24.Qf2 Nd7 25.f4 Qc5 26.Qc5 (26.Bg4 Qf2 27.Kf2 Nf6 28.Be6 Kh8–/+) 26...Nc5 (worse is 26...bc5 27.a5+=) 27.Bf3 (27.Rfd1 Re8 28.Ra2 Na4–+) 27...d4 28.Bb7 Rb7 (28...Ncb7?! 29.Nd5 Nc5 30.Nb6+=; 28...dc3?! 29.Bd5 Kh8 30.Nc4 Nc4 31.Bc4 Ra4 32.Ra4 Na4 33.Ra1+=) 29.Nd5 (29.Ne2 d3 30.Nc3 Ra7–/+) 29...c3 30.Nf3 Nf5 (30...Rd8 31.Nd4 Nc4 32.Nc3 Rd4 33.Rfd1–+) 31.Rfd1 (better is 31.Rfe1!?–/+) 31...c2–+ 32.Rd4 (32.Rf1–+) 32...Nd4 33.Nd4 Rd8 34.Nc2 Rd5 35.Nb4 (35.Ne3 Rd4–+) 35...Rd2 36.Nc6 Rbd7 37.Ra3 (37.g4–+) 37...Rb2 38.Ra1 Na4 0–1. Menze,Gerold – Wohlrabe,Joerg (1945), ch–City, Solingen GER (4), 2004.

6.a4 ab5

7.ab5 Ra1 8.Ba1 Bb4 9.Nf3 0–0 10.Be2 d6 11.0–0 Nbd7 12.d4 Re8 13.Nbd2 e5 14.Qb3 Ba5 15.de5 Ne5 16.Nd4?? Bd2–+ 17.Bf3 Bf3 18.gf3 Qd7 19.Kh1 Qh3 20.Rg1 Nf3 21.Rg2 Nd4 22.Bd4 Qf3 23.Qd3 Bb4 24.Qb1 Bc5 25.Qb2 Bd4 26.Qd4 g6 27.Qd2 Ne4 28.Qc2 Re5 (28...Re5 29.Kg1 Nc3–+) 0–1. carocan (1800) – danito888 (1635), kurnik, 2011.

7.ab5 Ra1 8.Ba1 c6 9.Nf3 cb5 10.cb5 Bf3 11.Qf3 Be7 12.Bf6 Bf6 13.d4 0–0 14.Bd3 d5 15.0–0 Qd7 16.g3 Rc8 17.h4 Qd6 18.h5 h6 19.Qe2 e5 20.de5 Qe5 21.Nd2 Nd7 22.Nf3 Qc3 23.Bf5= Rc7 24.Bd7 Rd7= 25.Rd1 Qb3 26.Qd3 Qd3 27.Rd3 g6 28.hg6 fg6 29.e4 d4 30.e5 Be7? 31.Rd4+/– Rd4 32.Nd4 Bc5 33.Ne6 Kf7?? 34.Nc5 bc5 35.b6 1–0. ludice (1665) – jawo40, kurnik, 2011.

7.ab5 Ra1 8.Ba1 d5 9.Nf3 Ne4 10.Qb3 Nc5 11.Qc2 dc4 12.Bc4 Nbd7 13.d4 Ne4 14.0–0 Nef6 15.Nfd2 Bd6 16.e4+= 0–0 17.e5 Be7? 18.ef6+– Nf6 19.Rd1 c6 20.Nc3 cb5 21.Nb5 Bb4 22.Qb3 Bd2 23.Rd2 Ne4 24.Re2 Nd6 25.Nd6 Qd6 26.Bb2 Rc8 27.h3 Qc6+/– 28.Be6?? Qg2 0–1. nizinna – pako1, kurnik, 2011.

7.ab5 Ra1 8.Ba1 Ne4 9.Nf3 Ng5 10.Ng5 Qg5 11.d4 Bd6 12.Bc3 0–0 13.Nd2 c6 14.Ne4 Qe7 15.bc6 Bc6 16.Nd6 Qd6 17.d5 ed5 18.cd5 Bb7 19.Qd4 Qg6 20.Bd3 Qh6 21.0–0 Ba6 22.Rb1 Bd3 23.Qd3 Rc8 24.Qd4 Qg6 25.Rb6 d6 26.h3 Nd7? 27.Rd6! Nf6 28.Qb6 h6 29.Bf6 Kh7 30.Rc6 Rc6 31.dc6 gf6 32.c7 Qc2 33.Qb7 f5 34.c8Q Qd1 35.Kh2 Kg7 36.Qb2 Kg6 37.Qg8 Kh5 38.Qf7 Kg5 39.Qbf6# 1–0. marekt – vina008, Yahoo, 2005.

7.ab5 Be7 8.Ra8 Ba8 9.Nf3 0–0 10.Be2 d5 11.0–0 dc4 12.Bc4 Nbd7 13.d4 Re8 14.Nbd2 Nf8 15.Qb3 Bd5 16.Ne5 Ng6 17.Bd5 ed5 18.Nc6 Qd7 19.Ra1 Bd6 20.Ba3 Ba3 21.Qa3 h6 22.Qa7 Ng4 23.h3 Nf6 24.Qb7 Nf8 25.Ra7 Ne6 26.f4 g6 27.Nf3 Rc8?? 28.Ra8 Ra8+= 29.Qa8 Kg7 30.Nfe5 Qd6 31.Nd3 Ne4 32.Ndb4 h5 33.Qa2 Nc3 34.Qb3 Ne2? 35.Kf2+– N2f4 36.ef4 Qf4 37.Qf3 Qd2 38.Kg3 Nd4 39.Qd5 Nf5 40.Kh2 Qf4 41.Kg1 Qe3 42.Kf1?? Ng3 0–1. carocan (1770) – zozolee, kurnik, 2011.

7.ab5 Be7 8.Nf3 0–0 9.Nc3 d5 10.cd5 Nd5 11.Ra8 Ba8 12.Be2 Nc3 13.Bc3 Nd7 14.Qa1 f6 15.0–0 Nc5 16.Nd4 e5 17.Nf5 Re8 18.Rd1 Qd5 19.Ne7 19...Re7+= 20.Bf3 e4 21.Be2 Re8 22.Bd4 Nb3 23.Qc3 Nd4 24.ed4 e3?? 25.Bc4+– ef2 26.Kf2 Re7 27.Bd5 Bd5 28.Re1 Rd7 29.Re8 Kf7 30.Rc8 (30…h6 31.Rc7+–) 1–0. hal1958 – BigAl, playchess.de, 2003.

7.cb5 Bd6 8.Nf3 0–0 9.Be2 e5 10.0–0 e4 Black gets the initiative 11.Nd4 g6 (11...Qe8 12.f3=) 12.Nc3 c5 13.Nb3 (13.bc6 dc6 14.d3 Qc7 15.de4 Bh2 16.Kh1 Be5+=) 13...Qc7= 14.h3 Bh2 (14...c4 15.Nd4=) 15.Kh1+= Be5 16.Qc2 (16.f4 Bc3 17.Bc3 Nd5+=) 16...d5 Black prepares the advance c4 17.d3 (better is 17.f4 Bd6 18.Rac1=) 17...ed3–+ 18.Bd3 c4 19.Nd5 Bd5 (19...cd3?? 20.Qc7 (20.Nc7?! dc2 21.Be5 Ne4+–; 20.Nf6 Kg7 21.Ne8 Kg8 22.Qc7 Bc7 23.Nc7 Ra7+–) 20...Bc7 21.Nf6 (21.Nc7?! Ne4+–) 21...Kg7 22.Ne8 Kg8 23.Nc7+–) 20.Rfc1?? (better is 20.Be5 Qe5 21.Bc4–+) 20...Qd7 (20...cb3?! 21.Qc7 Bc7 22.Rc7–+; worse is 20...cd3 21.Qc7 Bc7 22.Rc7 Bb3 23.Bf6–+) 21.Bf5 cb3 (21...cb3 22.Be5 bc2 (22...Qf5?! 23.Qf5 gf5 24.Bf6–+) 23.Bd7 Nfd7 24.Bb8 Rfb8 25.Rc2 Bb3–+; worse is 21...Qf5 22.Qf5 gf5 23.Be5–+) 0–1. Van Esbroeck,Dirk – Johnson,Gardner, corr APCT Q140, 1992.

5.c4 Bb4

6.Nf3 0–0 7.a3 Ba5 (7...Be7 8.Be2=) 8.Be2 (8.Qc2 a6=) 8...Ne4 (8...d5 9.0–0=) 9.0–0 c6 (9...a6 10.d3 Nd6 11.a4=) 10.d3 cb5?? (better is 10...Nf6=) 11.de4+– Be4 (11...bc4 12.Bc4 Qe7 13.Nbd2+–) 12.cb5 (12.Qd4 Qf6 13.Qf6 gf6 14.cb5 f5+–) 12...d5 13.Nbd2 Bf5 (13...Bf3 14.Nf3 a6 15.Qd4+–) 14.Rc1 (14.Nb3 a6+–) 14...Nd7 (14...a6 15.ba6 Na6 16.Nd4+–) 15.Nb3 Nf6 (15...Be4 16.Rc6+–) 16.Nfd4 Bg6 (16...Be4 17.Nc6 Qd7 18.Bf6 gf6 19.Bf3 Bf3 20.Qf3+– (worse is 20.gf3 Kh8+–)) 17.Na5 (17.Nc6 Qd7+–) 17...ba5 18.Nc6 Qc7 (18...Qd6 19.Qa4+–) 19.Be5 (19.Bf6 gf6 20.Qd4 Kg7+–) 19...Qd7 20.Na5 (20.Bf6 gf6 21.Qd4 Kg7+–) 20...Ne4 (20...Ne8 21.Nc6+–) 21.Nc6 (21.Rc7 Qd8 22.Nc6 Qg5+–) 21...Rac8 (21...f6 22.Bf4+–) 22.Qa4 (better is 22.f3 Nd6 23.Qd4+–) 22...Nc5 (22...f6 23.Bd4 Ra8 24.Ba7+– (worse is 24.Na7 e5 25.Bb6 Qb7+–)) 23.Qa7 (better is 23.Rc5 f6 24.Bg3 Ra8+–) 23...Rc7 (23...Nb7+–) 24.Qc5 (24.Qc5 Rb7 25.Na5+–; 24.Rc5?! Ra7 25.Na7 Qa7+=) 1–0. GuestNQZQ – GuestCVYQ, freechess.org, 2016.

6.Nf3 0–0 7.Bd3 d5 (7...a6 8.0–0+=) 8.a3 (8.cd5 Qd5 9.Qc2 Nbd7=) 8...dc4+= 9.Bc4 Bd6 10.0–0 Nbd7 (10...a6 11.Nc3+=) 11.d4 (11.Nc3 a6=) 11...Rc8 (11...a6 12.a4=) 12.Ne5 Ne4 (12...c5 13.bc6 Bc6 14.Nc6 Rc6 15.Qa4=) 13.f3 Nef6 14.e4 Nh5 (14...Ne5 15.de5 Bc5 16.Kh1=) 15.Nd7+= Qd7 16.e5 Be7 17.f4 g6 18.g4 (18.f5!? ef5 19.Qb3=) 18...Ng7+= 19.Qd3 (19.Nd2 c6 20.Qb3 Rfd8+=) 19...Bd5 (19...Rfd8!?+=) 20.Bd5+= Qd5 21.Nc3 Qd7 22.Ne4 (22.Rad1 c6=) 22...Rfd8 23.Rac1 Qd5 (23...c6 24.bc6 Rc6 25.Rc6 Qc6 26.Rc1=) 24.Rc6+= Qa2 (24...Ne8 25.f5 ef5 26.gf5 Qe5 27.f6+=) 25.Qc2 (better is 25.Rf2+/–) 25...Rd4?? (better is 25...Qd5+=) 26.Bd4+– Qa3 (26...Qd5 27.Bf2 Qb5 28.Rc7 Rc7 29.Qc7+–) 27.Rc7 Rc7 28.Qc7 Bf8 (28...Ne8 29.Qd7 Kf8+–) 29.Nf6 Kh8 30.Qf7 Qb4 (30...Qg3 31.hg3 a6 32.Qf8) 31.Qg8 1–0. DEFFM – GuestGMKK, freechess.org, 2018.

5.c4 c5

6.d3 d5 7.Nd2 Bd6 8.Ngf3 Nbd7 9.a4 0–0 10.Qc2 d4 11.e4 (11.ed4!? cd4 A) 12.Bd4= A1) 12...a6 A11) 13.ba6 Ra6 14.Be2 e5 (14...Qc7 15.0–0 Rfa8 16.Rfe1=) 15.Be3 Qc7= 16.0–0=; A12) 13.Bb2 e5 14.Be2 Re8 15.0–0 Nc5 16.Rfe1+=; A13) 13.Be2 e5 14.Bc3 Re8 15.0–0 Qc7 16.Rfe1+=; A2) 12...e5 13.Be3 a6 (13...Ng4 14.Be2 Ne3 15.fe3 Nf6 16.h3=) 14.ba6 Ra6 15.Be2 Qc7= (15...Ng4 16.0–0=) 16.0–0=; B) 12.Nd4 e5 13.Nf5 (13.N4f3 Bb4 14.Bc3 Bc3 15.Qc3 Qc7 16.a5=) 13...Bb4 14.Be2 Re8 (14...Nc5 15.Be5 Re8 16.f4+=) 15.0–0 Nc5+= 16.Nf3+=) 11...Ng4+= (11...Ne5 12.Be2 Nf3 (12...Ng6 13.a5 a6 14.ab6 Qb6 15.ba6 Ra6+=; 12...a6 13.0–0 Nf3 14.Nf3 Qc7 15.Rfb1 Nd7+=; 12...Qc7 13.Ne5 Be5 14.Nf3 Bf4 15.0–0 a6+=) 13.Nf3 Nd7 14.0–0 f5 15.a5 fe4–/+; 11...a6 12.Be2 Qc7 13.0–0 Ng4 14.h3 Nh2 15.Rfb1 Nf3+=; 11...Qc7 A) 12.Bc1 a6 (12...Ng4 13.Be2 f5 14.a5 ba5 15.Ng5 Rfe8+=; 12...Nh5 13.Qd1 Nf4 14.g3 Ng6 15.Bg2 a6+=) 13.Be2 Ra7 14.0–0 Rfa8 15.Ra2 Nh5+=; B) 12.Be2 a6 13.Bc1 Ne5 14.Ne5 Be5 15.Nf3 Bd6+=; 11...Re8 12.Be2 a6 (12...Qc7 13.0–0 a6 14.Rfb1 Ra7 15.Bc1 Rea8+=) 13.Bc1 Qc7 14.ba6 Ra6 15.0–0 Rea8–/+; 11...Bf4 12.Be2 e5 (12...Qc7 13.0–0 a6 14.Rfb1 Rfe8 15.Bc1 e5+=; 12...a6 13.0–0 Ng4 14.g3 Bd2 15.Nd2 f5+=) 13.0–0 a6 14.ba6 Ra6 15.Bc1 Qc7+=) 12.h3 (12.a5 a6 (12...ba5 13.Nb3 a4 14.Ra4 a6 15.Be2 ab5+=) 13.ab6 Nb6 14.Be2 Qf6 15.ba6 Ba6+=) 12...Nge5 13.Be2 (13.Ne5 Ne5 14.a5 a6 15.ab6 Qb6–/+) 13...f5 (13...Nf3 14.Bf3 a6 15.0–0 Qf6+=) 14.Bc1 (14.a5 ba5 15.0–0 fe4–/+) 14...Ng6 (14...a6 15.0–0 Nf3–/+) 15.0–0 Nf4 16.Nb3 fe4 17.de4 d3 18.Bd3 Nh3 19.gh3 Rf3 20.Kg2 (20.Be2 Rh3 21.Bg4 Rh1 22.Kg2 Rh2 23.Kf3 Ne5 24.Ke2 Ng4 25.a5–+) 20...Ne5 21.Be2 (21.Qe2 Rd3 22.Ra3 Qh4–+) 21...Qf6 22.Bf3 (22.h4 Qg6 23.Bg5 Be4–+) 22...Qf3 (22...Nf3 23.Rd1 Rf8 24.Kf1 Nh2 25.Ke1 Be4 26.Qe2 Qc3 27.Bd2 Qh3 28.Be3 Nf3 29.Qf3 Rf3 30.Rd6 Re3 31.fe3 Qe3 32.Kd1 Qb3 33.Kd2 Qb2 34.Ke3 Qa1 35.Rd8 Kf7 36.Ke4 Qa4 37.Ke3–+) 23.Kg1 Be4 (23...Be4 24.Qe4 Qe4–+) 0–1. De Visser,Arno – Waagmeester, 1996.

5.c4 c6

6.a4 cb5 7.ab5 a6 8.Qa4 ab5 9.Qb5 Ra1 10.Ba1 Be7 11.Bd4 0–0 12.Bb6 Qc8 13.Nf3 Ba6 14.Qa4 Qb7–/+ 15.c5 Bf1 16.Rf1 Bc5?? 17.Bc5+– Qb1 18.Ke2 Qb7 19.Ne5?? Rc8–/+ 20.Be7 Nd5 21.Bd6=+ Nc6 22.Nc4 g6 23.Ra1= h5 24.Ke1 Nf6 25.Qc2 Ng4 26.Rb1 Qa6 27.Nb6+/– Rd8 28.Bc7 Re8 29.Nd7 Rc8 30.Nc5 Qa7 31.Bd6 Nce5 32.h3 Qa8? 33.hg4+– Qg2 34.Be5 Qg1 35.Ke2 Qg4 36.Kf1 (36.Kf1 Ra8 37.Ne4 Qh3 38.Ke1+–) 1–0. pierred – davidyung1, Yahoo, 2005.

6.a4 cb5 7.ab5 Bc5 8.Nf3 Qe7 9.Nc3 0–0 10.d4 Bb4 11.Bd3 Be4 12.0–0 (worse is 12.Be4 Ne4 13.Qd3 d5+=) 12...Bd3 13.Qd3 Bc3 14.Bc3 d5 15.cd5 Nd5 16.Bd2 Nd7 17.e4 Nb4?? (better is 17...N5f6+–) 18.Qc4 a5 19.ba6 Rfc8 (19...Na6 20.Ra6 Nf6 21.Bg5+–) 20.Bb4 Qg5 (20...Rc4 21.Be7 f6+–) 21.Qc8! (21.Qc8 Rc8 22.Ng5+–) 1–0. Janek – Ege, internet, 2016.

6.a4 c5 7.d4 d6 8.Nf3 Be7 9.Be2 Nbd7 10.Nbd2 h6 11.0–0 0–0 12.Bd3 Re8 13.e4 cd4 14.Nd4 e5 15.Nf5 Bf8 16.Qf3 Nc5 17.Bc2 Qd7 18.Qg3 Nh5 19.Nh6 Kh7 20.Qh4 gh6 21.Qh5+/– Ne4?? 22.f3 f5 23.fe4 f4 24.g3 Qg7 25.Qf5 Qg6 26.Qg6 Kg6 27.gf4 Be7 28.f5 Kf6 29.Kf2 Rg8 30.Rg1 Rg5 31.Rg5 hg5 32.Rg1 Rh8 33.Kg3 Rh4 34.Bc1 Kf7 35.Nf3 Rf4 (36.Bf4 gf4 37.Kg4 Kg7+–; 35...Be4 36.Bg5 Rf4 37.Be4 Re4 38.f6 Bf6 39.Rf1 Rc4 40.Nd2+–). chevin – Dona2, Caissa.com, 2004.

6.a4 d5 7.cd5 cd5 8.Nf3 Bd6 9.Be2 Nbd7 (9...0–0 10.0–0=) 10.d4 0–0 11.0–0 Ne4 12.Nbd2 (12.Ba3 Ba3 13.Na3 Qf6=) 12...f5 (12...Ndf6 13.Ne4 de4 14.Ne5=) 13.Ne4 (13.Ba3 Ba3 14.Ra3 Rc8=) 13...fe4 14.Ne5 Rf6 (14...Rc8 15.Nd7 Qd7 16.Ba3=) 15.Nd7 (15.Rc1 a6=) 15...Qd7 16.f3 (16.Ba3 a6=) 16...Raf8 (16...ef3!? 17.Bf3 Qc7+=) 17.fe4= Rf1 18.Bf1 de4 19.Qg4 (19.Ba3 Ba3 20.Ra3 Qd6+=) 19...Bd5 20.Ba3?? (20.Rc1 Qf7 21.Qh4 Qf6 22.Qf6 gf6=) 20...Qf7 21.Qe2 (21.Bd6?? Qf2 22.Kh1 Qf1 23.Rf1 Rf1) 21...Ba3 22.Ra3 (22.a5 Bb4 23.ab6 ab6 24.Qb2–+) 22...Rc8 (22...Bc4 23.Qf3 ef3 24.Bc4 fg2 25.Be6 Qe6 26.e4 Qg4 27.Ra1 Qh3 28.a5 Rf1 29.Rf1 gf1Q) 23.Qd2 White prepares the advance a5 23...Qc7 (23...Qf5 24.Qf2=) 24.a5 Bc4?? (24...e5 25.de5 Qe5 26.ab6 ab6 27.Ra6=) 25.Bc4 (better is 25.Rc3+–) 25...Qc4= 26.ab6 ab6 27.Qb2 Rf8 (27...Qc1 28.Qc1 Rc1 29.Kf2+=) 28.Ra1 (28.h3 e5=) 28...h5 (28...Qd3 29.Re1=) 29.h4 (29.Rd1 Rf5+=) 29...Rf5= Attacks the isolani on b5 30.Rc1 (30.Qb1 Qd3 31.Qd3 ed3=) 30...Qd3 31.Qc3 Rb5 32.Qc8 (32.Qe1 Rb3 33.Rc6 Rb1–/+) 32...Kh7 33.Re1 Qd2 Threatening mate: Qxe1 34.Qc1 Qa2 (34...Qc1 35.Rc1 e5 36.Rc6 ed4 37.ed4–/+) 35.Qd1 Kh6 36.Re2 Qd5 (36...Qb1 37.Rd2–/+) 37.Qf1 (37.Rf2 Qb3 38.Qe1 Rf5+=) 37...Kh7 (37...e5 38.Rd2+=) 38.Rf2 Rb3 39.Qd1? (better is 39.Qc1+=) 39...Re3–+ 40.Re2? (better is 40.Rd2–+) 40...Rd3 (40...Re2 41.Qe2 Qd4 42.Kh2 Qe5 43.Kg1–+) 41.Qa4 (41.Qa1 e5!–+) 41...Rd4 42.Qc2 (42.Qe8 Rd1 43.Kh2 Rh1 44.Kh1 Qd1 45.Kh2 Qe2 46.Qe6 Qg4 47.Qb6 Qh4 48.Kg1 Qe1 49.Kh2 h4–+) 42...Rc4 (42...Rd1 43.Kh2 Qd6 44.g3–+) 43.Qb2 Qc5 44.Kh2 Qc7 45.g3 e3 (45...Rc3 46.Rg2–+) 46.Qb1 g6 (46...Kh6 47.Re3 Rc2 48.Kh3–+) 47.Re3 (47.Kh3 e5–+) 47...Rh4 48.Kg1 (48.Kg2 Qc6 49.Rf3 Rc4–+) 48...Rc4 (48...Qc5 49.Qd3 Qc1 50.Kf2 Rh2 51.Kf3–+) 49.Re1 (49.Qd3–+) 49...Qg3 (49...Qg3 50.Kf1 Qf3 51.Kg1 Rg4 52.Kh2 Qg2) 0–1. Melzig,Ernst – Polifka,Wilfried, GER–ch Seniors, 2001.

6.a4 Be7 7.Nf3=+.

5.c4 d5

6.cd5 Bd5 7.Nf3 Bd6 8.Be2 Nbd7 9.0–0 0–0 10.d3 a6 11.a4 Qe7 12.e4 Bb7 13.e5 Ng4 14.ed6 Qd6 15.Nbd2 Rfe8 16.h3 Nh6 17.Nc4 Qe7 18.Nce5 Nf6 19.Nd4 Qb4 20.Qb3 a5 21.Qb4 ab4 22.Rfc1 Nd5 23.Bf3 Rad8 24.Bd5 Rd5 25.Rc7 Ba8 26.Ndc6 f6 27.Nb4 Rc5 28.Nec6 Nf5 29.g4 Nh4 30.Kf1 Ng6 31.Bd4 1–0. Bulcourf – Zega, San Fernando 1993.

6.cd5 Bd5 7.Nf3 Nbd7 8.Nc3 Bb4 9.Nd5+= ed5 10.a3 Bd6 11.Be2 0–0 12.a4 Bb4 13.0–0+/– Re8 14.Bc3 Bc3= 15.dc3 Ne5 16.e4 Nf3 17.Bf3 de4 18.Qd8 Rad8 19.Be2 Re5 20.Rfd1 Red5 21.Rd5 Rd5 22.Rd1 Rd1 23.Bd1 Nd5 24.c4 Nc3 25.Bc2 g6 26.Kf1 Kg7 27.Ke1 f5 28.Kd2 Na2–/+ 29.Ke3 Nb4 30.Bb1 c5 31.f3 ef3 32.Kf3 Kf6 33.g3 Ke5 34.h3? a6 35.g4 ab5–+ 36.ab5 h6 37.gf5 gf5 0–1. yannigator (1920) – jplayer (2090), net–chess.com, 2010.

6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4).

6.f4 dc4 7.Nf3 Bd5 8.Qc2 Nbd7 9.Bc4 Bc4 10.Qc4 Be7 11.0–0 0–0 12.d4 Rc8 13.Ne5 Ne5 14.de5 Nd5 15.Qd3? f6?? 16.Nd2 fe5 17.fe5 Bc5 18.Bd4 Qg5?? 19.Nf3 Qg6 20.Qg6 hg6 21.Bc5 bc5 22.Kf2 Rb8 23.a4 Nb4 24.Ra3 Rbd8? 25.Rc3 Rd2? 26.Kg3+– Rd5 27.Rfc1 Nd3 28.R1c2 Ne5 29.Rc5 Rc5 30.Rc5 Nf3 31.gf3 Rf7 32.f4 Kf8 33.Kf3 Ke8 34.Ke4 Kd7 35.Rc6 Rf8 36.Ra6 Ra8 37.Ke5 g5 38.Re6 gf4 39.ef4 Rh8 40.Rg6 Rh7 41.f5 Ke7 42.Rg2 Kf7? 43.Kd5 Rh4 44.Ra2 Rf4 45.Kc6 Rc4 46.Kb7 Kf6 47.Ka7 Kf5 48.a5 g6 49.b6 cb6 50.ab6 (50.Kb6?! Rb4 51.Kc5 Rb8+–) 1–0. graczmarny (1660) – bratek55 (1610), kurnik, 2011.

5.c4 d6

6.Nf3 Nbd7 7.d4 c5 8.bc6 Bc6 9.Nc3 a6 10.Be2 Be7 11.0–0 Ne4 (better is 11...0–0!?=) 12.d5+/– Nc3 13.Bc3 ed5 (13...Bb7 14.Bg7 Rg8 15.Bd4+/–) 14.cd5+– Bb7 15.Bg7 Rg8 16.Bh6 Nf6 17.e4 Ne4? (better is 17...Qd7 18.Bd3 Qg4+/–) 18.Qa4+– b5 (18...Qd7 19.Qe4 Qg4 20.Qg4 Rg4 21.Rad1+–) 19.Qe4 Rg6 20.Bf4 (20.Be3 Bc8+–) 20...Qd7 (20...Re6 21.Qd3 (worse is 21.de6 Be4 22.ef7 Kf7–/+) 21...Bd5 22.Qd5 Re2 23.Nd4+–) 21.Rac1 (better is 21.Nd4 Rc8 22.Bh5+–) 21...Qh3 (21...Qe6 22.Qe6 fe6 23.de6 Bd5+–) 22.Ng5 (better is 22.Qg6! fg6 23.gh3 Bd5+–) 22...Qd7 23.Nh7 Kd8 (23...Qd8 24.Bh5 Rg7 25.Rfe1 Bd5 26.Nf6 Kf8 27.Nd5+–) 24.Qd4 (better is 24.Be3 Bc8 25.Bh5+–) 24...f6 (24...Bc8+–) 25.Bh5 Qf5 26.Bg6 Qg6 27.Qb6 Ke8 28.Qb7 Rd8 29.Nf6! Qf6 Decoy to f6 (29...Bf6 30.Kh1) 30.Rfe1 Kf8 31.Re6 Qf7 32.Rce1 (32.Bh6 Kg8 33.Re7 Qf6+–) 32...Re8 33.Qd7 Qf4 34.Re7 Re7 35.Qe7 Kg8 36.Qd7 Qf7 37.Re8 Kg7 38.Qg4 Kf6 39.Re6 (39.Re6 Qe6 40.Qe6 Kg7 41.Qe7 Kh6 42.Qf6 Kh7 43.h4 Kg8 44.h5 b4 45.h6 b3 46.Qg7) 1–0. Margraf,A – Lehbach, corr, 1989.

6.Nf3 Be7 7.Be2 0–0 8.0–0 Nbd7 9.d4 d5 10.Nbd2 c5 11.dc5 Nc5 12.cd5 Nd5 13.a4 Rc8 14.Nb3 Nb3 15.Qb3 Bd6 16.Rac1 Qd7 17.Ne5 Be5 18.Be5 Rc1 19.Rc1 Rc8 20.Rc8 Qc8 21.Qb2 g6 22.Bh8 Qf8 23.Bf3 f5 24.Be5 Qb4?? 25.Qb4+– Nb4 26.Bb7 (26...Nd3 27.Bb8+–) 1–0. hal1958 – schnitzly, playchess.de, 2003.

5.c4 Be7

6.Nc3 0–0 7.a4 (7.Nf3 a6=) 7...c5 8.Nf3 d5 (8...a6 9.Bd3=) 9.d4 cd4 (9...Nbd7+=) 10.ed4 (10.Qd4 Bc5 11.Qf4 a6=) 10...Bb4 (10...Nbd7 11.cd5 Nd5 12.Rc1–/+) 11.Qb3 (11.Rc1 a6+=) 11...Qd6 (11...a5 12.Ne5–/+) 12.Be2 (12.Ne5 Rd8+=) 12...Nbd7 (12...dc4!? 13.Bc4 Rc8–/+) 13.0–0 (13.Ne5 a5 14.0–0 Ne5 15.de5 dc4 16.Bc4 Qe5+=) 13...dc4 14.Qc4 Rfc8 (14...Rac8 15.Qb3 Ng4 16.g3+=) 15.Qd3 (15.Qb3 Ng4 16.g3 Ndf6+=) 15...Ng4 (15...e5!? 16.Ng5 Qd4–/+) 16.Ne4+= Be4 (16...Qd5 17.Neg5 Ndf6 18.h3+=) 17.Qe4 Ndf6 18.Qd3 Rc7 (18...Nd5 19.Rfc1+=) 19.h3 (19.Ne5 Nh6=) 19...Nh6 20.Ne5 Rac8 21.Nc6 Nd5 22.Bf3 Nf4 (22...a5!?=) 23.Qb3+/– a5 24.Nb4 (24.d5 Qd7 25.Be5 (25.Nb4?! ab4 26.Be5 Rc4+/–) 25...Nd5 26.Bc7 (worse is 26.Nb4 Nb4 27.Rfd1 Qe7+/–) 26...Nc7 27.Rfd1+–) 24...ab4= 25.Rac1 (25.Rfc1 Nf5 26.Rc7 Rc7=) 25...Nf5 Attacking the isolated pawn on d4 26.Rc7 Rc7 27.Rc1 (better is 27.Rd1!?=) 27...Rc1–/+ 28.Bc1 White terminates the opponent with strong threats 28...Qd4 (28...Nd4 29.Qd1–/+) 29.Bb2 (29.Qc2 h6 30.Qc8 Kh7 31.Bf4 Qf4–/+) 29...Qc5 (29...Qd2 30.Qc4 h6 31.Bc1 Qe1 32.Kh2–/+) 30.Qd1+= Nd5 31.Qd2 Nd6 (31...b3 32.Qg5=) 32.Bd4 Qc7 (32...Qc4 33.Bb6 Ne4 34.Be4 Qe4 35.a5=) 33.Bd5 ed5 34.Qb4 (34.Qe3 Ne4+=) 34...Qc1 (34...Nc4 35.Qc3=) 35.Kh2+= Nc4? (better is 35...Nc8+=) 36.Qe7+– Threatening mate: Qd8 36...Qf4 37.g3 Qb8? (better is 37...Qd6 38.Qd6 Nd6 39.Bb6 Kf8+–) 38.Qg5 Qf8 39.Qd5 (39.Qd5 Qc8 40.Qc6 Qc6 41.bc6+–) 1–0. Zylla,Johannes – NN, 1991.

6.Be2 Bg2 7.Bf3 Bh1 8.Bh1 d5 (8...c6 9.e4 (9.Nc3–+ d5 10.Qb3 Qc7–+) 9...d5 10.e5 Ne4–/+) 9.Nc3 (9.cd5 ed5 10.Bf6 Bf6–+ (10...gf6?! 11.Qh5+=)) 9...Qd6 (9...c6 10.Qa4 Qd6–+) 10.cd5 (10.f4 c6–+) 10...ed5 (10...Qh2!? 11.Qf3 Qg1 12.Ke2–+) 11.Qf3 Nbd7 (11...Qh2 12.Nge2 Qe5 13.d4–/+) 12.Nd5–/+ Nd5 13.Qd5 Qd5 14.Bd5 Rd8 15.Nf3 0–0 16.Bc6 Nc5 17.Ke2 Nd3 18.Bd4 Nb4 19.Be4 f5 20.Bb1 c5 21.bc6 Nc6 22.a3? (better is 22.Bb2–/+) 22...Nd4–+ 23.ed4 g5 24.h3 g4 25.Ne5 gh3 26.Ba2 Kg7 27.Nc6 Rde8 28.Be6 (28.Kd3 Kg6 29.Ne5 Kg5–+) 28...Ba3! 29.d5 (29.Ra3 Re6) 29...h2 30.f4 Rf6 31.Kf3 Rh6 32.Rh1 Kf6 33.Nd4 Rh5 34.Kg3 (34.Nb5 Rh3 35.Kg2 Rd3 36.Kh2 Bc5–+ (36...Rd2?! 37.Kg3–+)) 34...Re7 35.Nf3 Bd6 36.Nh2 (36.Rh2 Rh2 37.Kh2 Bf4 38.Kg2 Rg7 39.Kf1–+) 36...Rg7 37.Kf2 Rh4 0–1. Zylla,Johannes – Nurminen,Jorma, corr ICCF–Cup8 V078, 1990.

6.Nf3 A) 6...0–0 A1) 7.Nc3 a6 (7...c5 8.Be2 a6 9.0–0 d5 10.d4 dc4= 11.Bc4=) 8.Be2 d5 A11) 9.0–0 dc4 10.Bc4 ab5+= (10...c6 11.ba6=) 11.Bb5+=; A12) 9.d3 ab5 10.cb5 c5 11.0–0=; A2) 7.a4 a6 (7...d5 8.cd5 Nd5 9.Bc4 a6 10.Nc3 c5 11.0–0=) 8.Be2 d5 9.0–0 dc4 10.Bc4 c6 11.d3=; A3) 7.Be2 A31) 7...d5 A311) 8.0–0 A3111) 8...dc4 9.Bc4 a6 10.a4 c6 (10...ab5= 11.ab5=) 11.d3=; A3112) 8...a6 9.d3 ab5 10.cb5 c5 11.bc6=; A312) 8.cd5 Nd5 9.0–0 a6 10.a4 ab5 11.ab5=; A32) 7...a6 8.Nc3 (8.0–0 d5 9.d3 ab5 10.cb5 c5= 11.bc6=) 8...d5 9.d3 ab5 10.cb5 c5 11.bc6=; B) 6...a6 7.Be2 d5 8.cd5 (8.0–0 dc4 9.Bc4 ab5 10.Bb5 c6= 11.Be2=; 8.d3 dc4 9.dc4 Qd1 10.Bd1 0–0 11.0–0+=) 8...Bd5 9.a4 ab5 10.ab5 Ra1 11.Ba1=.

5.Nf3 a5

6.c4 d5 7.cd5 Nd5 8.Be2 (8.Bc4 Be7 (8...Bd6 9.e4 Nf4 10.g3 Nh5 11.e5 Bb4 12.0–0 0–0 13.a3 Bc5+=; 8...Bb4 9.a3 Be7 10.0–0 0–0 11.e4 Nf6 12.d3 c5 13.Qc2 Nbd7=) 9.0–0 0–0 10.Nc3 Nc3 11.Bc3 c6 12.d3 cb5 13.Bb5 Na6=) 8...Bd6 (8...Bb4 9.a3 Bd6 10.0–0 0–0 11.e4 Nf4 12.Nc3 Qf6 13.d4 Qg6+=) 9.Nc3 (9.0–0 0–0 10.e4 Nf4 11.Nc3 Qf6 12.d4 Qg6 13.Nh4 Qg5+=) 9...0–0 10.0–0 (10.Nd5 Bd5 11.Qa4 c5 12.Qg4 g6 13.Qa4 Nd7=) 10...Nd7 (10...Nc3 11.dc3 Qf6 12.Qc2 Nd7 13.Rfd1 Nc5=) 11.Rc1 (11.Nd5 Bd5 12.Qc2 Rc8 13.Rfc1 c5=) 11...Nc3 12.Bc3 (12.Rc3 e5 13.d4 e4=) 12...Bd5 (12...Rc8 13.Nd4= Bd5=) 13.Qc2+= Nc5 (13...Rc8=) 14.d3 (better is 14.Be5+=) 14...Nd3+– 15.Qd3 (15.Bd3?! Bf3 16.gf3 Qg5 17.Kh1 Qh5 18.Bh7 Qh7=) 15...Bf3 16.Rfd1?? (better is 16.gf3 Qh4 17.f4+–) 16...Bd5 17.e4 (17.g3 f5–/+ (worse is 17...Ba2 18.Qc2+=)) 17...Qh4 (worse is 17...Ba2 18.Qc2+/–) 18.Bf3 (better is 18.e5!? Bc5 19.Bd4 Bd4 20.Qd4 Qd4 21.Rd4 Ba2 22.Bf3–/+) 18...Qh2–+ 19.Kf1 Bb7 20.Ke2 Bc5 (20...e5 21.Rh1 Qf4 22.Bd2–/+) 21.Rh1 (21.Qd2 f6–/+) 21...Qd6–+ 22.Qc2 e5 23.Rh5 Bd4 (23...Rfe8 24.Rch1 h6 25.g4–+) 24.Bd2 (24.Bd4!? Qd4 25.Rch1–/+) 24...Qd7–+ 25.a4 g6 (25...Rac8 26.Rh4 f5 27.Rch1–+) 26.Rh3 (26.Qc7 Qc7 27.Rc7 gh5 28.Rb7 Kg7–/+) 26...f6 (26...Rac8!?–+) 27.Qc7–/+ Rf7 28.Qc4 (28.Qd7!? Rd7 29.Bh6–/+) 28...Rc8 29.Qb3 Rc1 30.Bc1 Bc8 31.Ke1? (better is 31.Rh1!?–/+) 31...Qc7–+ 32.Bd2 (32.Bh6 Bh3 33.gh3 Qc3 34.Qc3 Bc3 35.Kf1 Rd7–+) 32...Bh3 33.gh3 Kg7 34.Be2 Rd7 35.Bd3 (35.Kf1 Bf2! 36.Ba5 Bh4–+) 35...Qd6 36.Ke2 Bf2! 37.Bc1 Bc5 0–1. Bulcourf,Carlos (2270) – Castillo,Santiago (2085), 1st Chesspangenberg Open, Buenos Aires (8), 2003.

6.Be2 Be7 7.a3 (7.0–0 0–0+=) 7...0–0= 8.0–0 (8.c4 d5=) 8...c5 (8...d6 9.d4=) 9.c4 (9.bc6 Nc6 10.c4 d5+=) 9...d5 10.d4 (10.cd5 ed5 11.d4 Nbd7=) 10...cd4 (10...Nbd7 11.cd5 Nd5 12.Nc3=) 11.Bd4 (11.Qd4 Bc5 12.Qf4 Nbd7=) 11...Bc5 (better is 11...Nbd7!?+=) 12.Bc5+= bc5 13.Nc3 dc4 (13...Nbd7 14.Qb3+=) 14.Nd2+/– Nbd7 15.Nc4 Nb6?? (better is 15...Bd5+/–) 16.Qd8+– Rad8 (16...Rfd8 17.Nb6 Rab8 18.Rfd1+–) 17.Nb6 Rd2 (17...Ne4 18.Ne4 Be4 19.Rfd1+–) 18.Nc4 Rc2 (18...Rd7 19.Na5 Ba8 20.Rfc1+–) 19.Rac1 Rc1 20.Rc1 Rd8 (20...Ra8 21.Na4 Bd5 22.Nc5+–) 21.Na5 Ba8 (21...Rb8 22.Nb7 Rb7 23.a4+–) 22.b6 Nd5 (22...Rb8 23.b7!+–) 23.b7 Nc3 (23...Rb8 24.Nd5 Bb7 25.Nb7 Rb7 26.Rc5 Rb1 27.Bf1+–) 24.Rc3 Bb7 25.Nb7 Rb8 (25...Ra8 26.Nc5 Kf8 27.a4+–) 26.Bf3 f5 (26...Ra8 27.Nc5 Ra7 28.a4+–) 27.a4 1–0. Lavendel – Fiisus, internet free game, 2018.

5.Nf3 a6

6.a4 a5 7.Be2 Be7 8.c4 d6 9.0–0 Nbd7 10.d4 0–0 11.Nbd2 h6 (11...Rc8 12.Bd3=) 12.Qc2 Rc8 13.Rac1 c5 14.Qb1 (14.bc6 Bc6 15.Bd3 d5+=) 14...d5 (14...cd4 15.Nd4 Nc5 16.Qc2=) 15.Ne5 (15.Rfd1 cd4 16.Bd4 Ba3=) 15...Qc7 16.Bf3 Nh7 (16...Bd6!? 17.Nd7 Nd7=) 17.Nd7+= Qd7 18.cd5 Bd5 19.e4 Ba8 20.Qa1 (20.Nc4 A) 20...cd4? 21.Nb6 Rc1 22.Qc1+– (22.Nd7?! Rb1 23.Rb1 Rd8=; 22.Rc1?! Qa7 23.Nc8 Qd7 24.Ne7 Qe7+/–); B) 20...Qa7+=) 20...f6 (20...Ng5 21.Be2=) 21.e5 (21.Nc4 Qc7 22.Rfe1 f5+=) 21...fe5 (21...Bf3 22.Nf3 Ng5 23.Ng5 fg5 24.dc5 Bc5 25.Rcd1=) 22.Ba8+= Ra8 23.dc5?? (better is 23.Nc4 Qb7 24.Ne5+/–) 23...Qd2–+ 24.Rcd1 Qg5 (24...Qc2 25.cb6 Bc5 26.Kh1 Rf2 27.Rf2 Qf2 28.Be5–+) 25.cb6–/+ Bc5 26.b7 Rab8 27.Be5 Nf6?? (better is 27...Rb7 28.Qc3 Bb4–/+) 28.Bb8+/– (28.Bb8 Rb8 29.Rde1+=) 1–0. GuestQGGS – GuestFWFP, freechess.org, 2017.

6.a4 Bb4 7.Bc3 Bc3 8.Nc3 ab5 9.Bb5=+.

6.a4 Bc5 7.Bc4 0–0 8.0–0 c6 9.d4 Be7 10.Nc3 Qc7 11.Bd3 d5 12.Qe2 ab5 13.ab5 Nbd7 14.bc6 Bc6 15.Nb5 Qb7 16.c4 Bb5 17.cb5 Rfc8 18.Ra6 Ne4 19.Rfa1 Nd6 20.Qd1 Nc4 21.Bc3 Ra6 22.ba6 Qa7 23.Qb3 Nb8 24.Nd2 Nd6 25.Bb4 Nc6 26.Bd6 Bd6 27.Rc1 Ne7 28.Rc8 Nc8 29.Bh7 Kf8 30.Bd3 Ne7 31.g3 Nc6 32.Qc2 Qa8 33.Bb5 Na7 34.Qh7 Qc8 35.Nf3 Qc1 36.Bf1 f6 37.Nh4 Qd1 38.Qh8 Kf7 39.Qa8 Nb5 40.Qc6 Qb1 41.Qd7 Be7 42.Qb5 1–0. marekt (2000) – yuneheart (1705), gameknot.com, 2014. (=1.Nf3 Nf6 2.b4 e6 3.b5 b6 4.Bb2 a6 5.a4 Bb7 6.e3 Bc5)

6.a4 g6 7.c4 Bg7 (7...ab5 A) 8.cb5 d5 (8...Bg7 9.Nc3 0–0 10.d4 Qe7 11.Be2 d6 12.0–0 Rc8) 9.Be2 Bd6 10.Nc3 0–0 11.0–0 Nbd7 12.d4 Qe7; B) 8.ab5 Ra1 9.Ba1= Bg7 10.Bd3 0–0 11.0–0 d6 12.Nc3 Nbd7; 7...Bc5 A) 8.Nc3 0–0 (8...d6 9.d4 Bb4 10.Bd3 0–0 11.0–0 Nbd7 12.Qc2 Qe7) 9.Be2 d5 10.cd5 Nd5 11.0–0 Nc3 12.Bc3 Qd5; B) 8.Bd3 d6 (8...0–0 9.Nc3 d6 10.0–0 Nbd7 11.Be2 Qe7 12.d4 Bb4) 9.Nc3 Nbd7 10.0–0 ab5 11.ab5 Ra1 12.Qa1 0–0; C) 8.Be2 ab5 (8...d6 9.Nc3 0–0 10.0–0 Nbd7 11.Qb3 ab5 12.ab5 Ra1) 9.ab5 Ra1 10.Ba1 0–0 11.Qa4 Be7 12.0–0 d6; 7...Bd6 A) 8.Bd3 0–0 (8...Qe7 9.Nc3 0–0 10.0–0 ab5 11.ab5 Ra1 12.Ba1 Re8) 9.Nc3 Qe7 10.0–0 ab5 11.ab5 Ra1 12.Ba1 Re8; B) 8.Na3 ab5 (8...0–0 9.Bd3 Qe7 10.0–0 e5 11.Qc2 Re8 12.e4 Nh5) 9.cb5 0–0 10.Nc4 Bc5 11.a5 ba5 12.Ra5 d5; C) 8.Nc3 e5 (8...0–0 9.Be2 e5 10.0–0 e4 11.Nd4 ab5 12.ab5 Ra1) 9.a5 ba5 10.Ra5 0–0 11.Be2 Qe7 12.Qa1 e4) 8.Be2 (8.Nc3 0–0= (8...Ne4 9.d4 Nc3 10.Bc3 d6 11.Be2 Nd7 12.0–0 Nc5) 9.Be2 Ne4 10.d4 d6 11.0–0 Nd7 12.Ne4 Be4; 8.Bd3 d6 (8...0–0 9.Nc3 d6 10.0–0 Nbd7 11.Qc2 Nc5 12.Be2 Nfe4) 9.Nc3 0–0 10.Bc2 Nbd7 11.d4 Qe7 12.0–0 ab5; 8.h3 ab5 (8...0–0 9.Nc3 d6 10.Be2 Nbd7 11.0–0 Nc5 12.d4 Nfe4) 9.ab5 Ra1 10.Ba1 d6 11.Nc3 Nbd7 12.Be2 0–0) 8...0–0 (8...ab5 9.ab5 Ra1 10.Ba1 d6 11.Bb2 Nbd7 12.Nc3 0–0) 9.0–0 (9.Nc3 d5= (9...Ne4 10.d4 d6 11.0–0 Nd7 12.Ne4 Be4) 10.d4 Nbd7 11.0–0 dc4 12.Bc4 ab5) 9...ab5 10.ab5 Ra1 11.Ba1 d5 (11...d6 12.Nc3= Nbd7) 12.d4 (12.Qc2 c5= (12...dc4 13.Na3 Qd5=); 12.cd5 ed5) 12...Nbd7 13.Nbd2 dc4 (13...Qe7 14.Qc2=) 14.Nc4 Qe7 15.Bb2 Ra8 16.Nfe5 Qb4 17.Qc1 (17.Qc2 Ne5 (worse is 17...Qb5 18.Nd6 Qd5 19.Nb7 Qb7 20.Bf3+–) 18.de5 Ne4=) 17...Ne5 18.Ne5 Ne8 (18...Nd5 19.Rd1=) 19.Nc6 Bc6 (19...Qb3 20.Qc3 Qc3 21.Bc3=) 20.Qc6+= (worse is 20.bc6 Ra2 21.Bc3 Qa4+=) 20...Ra2 21.Bc3 Qa3?? (21...Qe7 22.Bf3+=) 22.Bc4 (better is 22.Qe8 Bf8 23.Bg4+–) 22...Rc2+= 23.Qe8 Bf8 (better is 23...Qf8!? 24.Qd7 Rc3 25.Qc7 Qb4 26.Qd8 Qf8 27.Qf8 Kf8+=) 24.Be6!+/– fe6 (24...fe6 25.Qd7 Double attack (25.Qd7 Decoy)) 25.Qe6 Kg7 26.Ba1?? (better is 26.Be1+–) 26...Rc1= 27.Qe5 Kf7 28.d5?? (better is 28.Qd5 Ke7 29.Qe4 Kd8 30.Qd5 Kc8 31.g3=) 28...Rf1–+ 29.Kf1 Qd3 30.Ke1 Bb4 31.Bc3 Bc3 (31...Qc3?! 32.Qc3 Bc3 33.Ke2–+) 32.Qc3 Qc3 33.Kd1 Qb3 34.Ke1 Qb4 35.Kd1 Qb5 0–1. Franke,Roland – Ott,Guenter, Bahn–chT Fuessen, 1993.

6.ba6 Na6 7.Be2 Be7 8.0–0 0–0 9.Nc3 Nc5 10.d4 Na4 11.Na4 Ra4 12.c3 Qa8 13.Qb3 Bd5 14.c4 Rb4 15.Qc3 Ne4 16.Qc1 Bb7 17.Ba3 f5 18.Ne5 Rf6 19.Bb4 Bb4 20.Nd7 Rg6 21.Bh5 Nc3 22.d5 Rg5 23.Bf3 ed5 24.a3 Ba5 25.e4 de4 26.Qg5 ef3 27.g3 Ne2 28.Kh1 Bc3 29.Rad1 Nd4 30.Rd3 Qa3 31.Qd8 1–0. marus1 – SwedishPolicegun, internet, 2001.

6.Nc3 Bb4=.

6.Nc3 ab5 7.Nb5 c6 8.Bf6 gf6 9.Nc3 Bg7 10.Rb1 0–0 11.d4 d6 12.Nd2 c5 13.Nc4 cd4 14.ed4 Qc7 15.Nb5 Qc6 16.Nbd6 Ba6 17.Rb6 Qd5 18.c3 Nd7 19.Rb2 Rab8 20.Rb3 Rb3 21.ab3 e5 22.Qg4 Bc4 23.Nc4 ed4 24.Qd4 Re8 25.Ne3 Qb3 26.Qd7 Qc3 27.Qd2 Qa1 28.Ke2 Qa6 29.Qd3 Qa2 30.Kf3 h5 31.Nf5 Qa8 32.Kg3 Qb8 33.f4 Kh7 34.Nd6 Kh6 35.Nf7 1–0. mtra – olo, internet, 2002.

6.c4 ab5 7.cb5 c5 8.bc6 dc6 9.Be2+=.

6.c4 ab5 7.cb5 c5 8.bc6 Nc6 9.Nc3=.

6.c4 ab5 7.cb5 Be7 8.d4 0–0 9.Bd3 c5 10.0–0 Be4 11.Be4 Ne4 12.Nbd2 Nd2 13.Qd2 Bf6 14.dc5 Bb2 15.Qb2 bc5 16.a4 d5 17.Rfb1 Qb6 18.Qd2 Ra5 19.e4 Rd8 20.Rd1 h6 21.ed5 Rd5 22.Qe1 Kf8 23.Ne5 Rd1? (better is 23...Ra7+/–) 24.Qd1+– (24.Rd1?! Ra4 25.Rd7 A) 25...Qb5? 26.Rd8 (26.Rf7 Ke8 27.Rc7 Qb2 28.Rc8 Ke7 29.Rb8 Ra1 30.Rb7 Kd8 31.Rd7 Ke8–+) 26...Ke7 27.Rb8+–; B) 25...Kg8 26.Rf7 Rb4=) 24...Ke7?? (24...Qc7+–) 25.Qh5 (better is 25.Nc4 Qc7 26.b6 Qc6 27.Na5 Qb6+–) 25...g6 26.Qh4 Ke8 (26...f6 27.Ng6 Kd7 28.Qf6 Kc8 29.Ne7 Kb7 30.Qf3 Kc7+–) 27.Qf6 (27.Qh6?! Qd6 28.Qf4 f5 29.Ng6 Qf4 30.Nf4 Kf7+–) 27...Ra7 (27...Qd6 28.Qf7 Kd8 29.Qf6 Kc7 30.b6 Qb6 31.Qe7 Kc8+–) 28.Rd1 h5 29.Qg7 1–0. pierre – Nye123, chesshere.com, 2015.

6.c4 c5 7.Nc3 (7.a4 ab5 8.ab5 Ra1 9.Ba1 Be7=) 7...ab5= 8.Nb5 Be7 9.Be2 0–0 10.d4 (10.0–0 Nc6=) 10...cd4+= 11.Bd4 (11.ed4 Nc6+=) 11...Nc6 12.0–0 Nd4 (12...Ne4 13.Bb2+=) 13.ed4+= d5 14.a4 dc4 (14...Ne4 15.Rc1+=) 15.Bc4 Nd5 16.Qb3 (16.g3 Rc8 17.Rc1 g6+=) 16...Bf6 (16...Nf4 17.Rac1+=) 17.Rfc1+= Qd7 (17...g6 18.Ne5+=) 18.Ne5 Be5 (18...Qe7!?+=) 19.de5+= Rfc8 (19...Bc6 20.Nd6+=) 20.Nd6+/– Rc7? (20...Rc5+/–) 21.Bd5?? (better is 21.Nb7 Rb7 22.Bb5+–) 21...Bd5= 22.Qb6 Rc1 23.Rc1 g6? (better is 23...Qa4 24.Qe3 Rb8=) 24.a5+– Qa7 (24...Qe7 25.g3+–) 25.Qa7 Ra7 26.Rc5 h5 (26...Kf8 27.f3+–) 27.f4 (27.f3 Kg7+–) 27...Kg7 28.Kf2 f5? (28...Ra8 29.g3+–) 29.Nc8 (better is 29.Rc7! Rc7 30.Ne8 Kf7 31.Nc7+–) 29...Rb7 30.Nb6 Be4 31.g3 Kh6 32.h4 Kg7 33.Ke3 Rb8? (33...Ra7+–) 34.Rc7 Kh6 (34...Kg8 35.Kd4 Rb7 36.Rb7 Bb7 37.Kc5+–) 35.Rc8 (35.Nd7!? Rb3 36.Kd4 Rd3 37.Kc5 Kg7 38.Nf6 Kf8 39.Ne4 fe4+–) 35...Rb7 36.Kd4 (36.Rh8!? Kg7 37.Rd8 Kf7+–) 36...Ra7 37.Rc5 Rb7 (37...Kg7 38.Nc8 Ra6 39.Rc7 Kf8 40.Ra7+–) 38.Kc4 Rb8? (38...Kg7 39.Nc8 Bd5 40.Kd3+–) 39.Kb5 (39.Rc7 Rd8+–) 39...Bd3 (39...Rd8 40.a6 Rd3 41.Rc7 Rb3 42.Kc5 Rc3 43.Kd6 Rg3 44.a7+–) 40.Kc6 Be4 (40...Rd8+–) 41.Kc7 Rb7 (41...Rg8 42.Kd7 Rf8 43.Ke6+–) 42.Kd6 Rb8 (42...Kg7 43.Ke6 Bd3 44.Nd5+–) 43.Ke6 Re8 (43...Kg7+–) 44.Kd7 Rg8 45.e6 Bb7 46.e7 Rg7 47.Kd8 (47.Kd8 Ba8 48.e8Q Be4 49.Qh8 Rh7 50.Qf8 Rg7 51.Rc7 Kh7 52.Qg7) 1–0. Paulsen,Helmut (1790) – Schulz,Hans, Hamburger Senioren EM, 2015.

6.c4 d5 7.Nc3 Be7 8.Be2 0–0 9.0–0 (9.cd5 Nd5 10.a4=) 9...Qd6 (9...dc4 10.Bc4 ab5 11.Nb5=) 10.d4 (10.cd5 Nd5 11.Nd5 Bd5=) 10...Qb4 (10...ab5 11.cb5 Rc8 12.Qb3=) 11.Qb3 (11.Qc1 dc4 12.a4 c5 13.bc6 Nc6+=) 11...dc4= 12.Bc4 Bf3 13.gf3 c6 (13...ab5 14.Bb5 c6 15.Qb4 Bb4 16.Be2=) 14.a4+= Nd5 15.bc6 (worse is 15.Bd5 cd5 16.Qb4 Bb4=) 15...Nc3 16.Bc3 Qb3 17.Bb3 Nc6 18.d5 Nd8 (18...ed5 19.Bd5 Rac8 20.Rab1+=) 19.Bd4 Bc5 20.Bc5 bc5 21.Rfc1 Rc8 22.a5 Re8 (22...Rb8 23.Bc4 ed5 24.Bd5+/–) 23.Bc4 (23.d6 Rf8+/–) 23...ed5+/– 24.Bd5 Re5 25.e4 (25.Bc4 Rg5 26.Kf1 Rg6+/–) 25...Re7 (25...Ne6 26.Bb7 Rb8 27.Ba6+/–) 26.Rc4 (26.Rab1!?+/–) 26...Ne6+= 27.Rb1 g6 28.Rb6 Nd4 (28...Nf4 29.Ra6 Rd7 30.Rb6+=) 29.Kg2 (29.Ra6 Nf3 30.Kg2 Nd2+–) 29...Ra7 30.f4 Nb3?? (better is 30...Kg7+/–) 31.Rb3+– 1–0. Matveenko,Yury (2135) – Korotchenkov,Victor (1640), 2010.

6.d4 ab5 7.Bb5= c6 8.Bd3 d5 9.0–0 h6 (9...Ba6 10.Ba6 Ra6 11.Qd3+=) 10.c4 Bd6 (10...dc4 11.Bc4 Bd6 12.Qc2=) 11.Nc3 (11.Nbd2 Na6=) 11...Ba6 12.Qb3 (12.Nd2 0–0=) 12...Nbd7 (12...0–0 13.Rfb1=) 13.e4 (13.Rfd1 0–0=) 13...de4 (13...dc4 14.Bc4 b5 15.Be6 fe6 16.e5=) 14.Ne4 Ne4 15.Be4 Qc7 16.Rfe1 Nf6 17.Ne5 (17.c5!? bc5 18.dc5 Bc5 19.Bf6 gf6 20.Rec1+/–) 17...Ne4= 18.Re4 Be5 (18...0–0 19.Rc1=) 19.Re5 (19.de5 0–0+=) 19...0–0= 20.Qc3 f6 (20...Bb7!?+=) 21.Re6+/– Rae8 22.Rae1 (22.Re8 Re8 23.c5 bc5 24.Qc5 Re2+=) 22...Re6 23.Re6 Qd7 24.Re4 (24.Re1 Re8 25.Re8 Qe8+=) 24...Rd8 (24...Qf7!? 25.Ba3 Ra8+=) 25.Qb3+/– b5?? (better is 25...Kh7+/–) 26.cb5+– Qd5 27.ba6 1–0. Wall,Bill – Bacon, internet, 2004.

6.d4 Be7 7.a4+=.

6.a4 ab5

7.Bb5 c6 8.Bc4 (8.Be2 Ba6=) 8...d5+= 9.Bb3 Nbd7 (9...Bd6 10.0–0+=) 10.d4 (10.0–0 Bd6=) 10...Ba6 (10...Bb4 11.Bc3 Bc3 12.Nc3+=) 11.Nbd2 (11.Ba3 Ba3 12.Na3 0–0+=) 11...Be7 12.c4 0–0 (12...dc4 13.Bc4 Bc4 14.Nc4 Bb4 15.Ncd2=) 13.0–0 b5 (13...Bd6!?+=) 14.ab5+= dc4? (better is 14...cb5!? 15.c5 b4=) 15.ba6+– cb3 16.a7 (better is 16.Nb3!? Ra7 17.Qd3+–) 16...Qc7+= 17.Qb3 Nb6 (17...Ra7 18.Ra7 Qa7 19.Ra1+=) 18.Rfc1 (18.Ba3 c5 19.dc5 Nc8+/–) 18...Nc8 19.Ba3 (19.e4 Na7 20.Qc2 Qf4+=) 19...Na7 20.Be7 Qe7 21.Ne5 The isolani on c6 becomes a target 21...Rfc8 22.Nc6 (22.Qc2 Qd6+/–) 22...Qe8 (better is 22...Nc6 23.Ra8 Ra8 24.Rc6 Ra1 25.Nb1 Ra8+/–) 23.Ne7?? (better is 23.Ne5+/–) 23...Qe7–+ 24.Rc8 Rc8 25.Qa4 (25.e4 Qd7 26.Qe3 Nb5–+) 25...Ra8 26.h3 h6 27.Nc4 Nd5 28.e4 (28.Ne5 f6 29.Nc6 Nc6 30.Qa8 Nd8+=) 28...Nc3 (28...Nf4 29.Qc2–+) 29.Qc2 Ncb5 30.Qb2 (30.Qd3 Rd8 31.d5 ed5 32.ed5 Qf6–+) 30...Rd8 (30...Qh4 31.Nb6 Rd8 32.Ra5–+) 31.Rd1 Qc7 (better is 31...Qh4 32.f3 Rb8–+) 32.Rc1? (32.Ne5–+) 32...Nd4 33.Kh1 (33.e5 Qb8 34.Qb8 Rb8–+) 33...Qb8 (33...Nac6 34.Qb6 Qf4 35.Rd1–+) 34.Qa2 (34.Qb8 Rb8 35.f4 Nac6–+) 34...Nac6 (34...Qf4 35.Rd1 Nac6 36.f3–+) 35.Rd1 (35.Qb2 Qf4 36.f3 e5–+) 35...Qb3 (better is 35...Qf4!? 36.f3–+) 36.Qb3 Nb3 37.Rb1 (37.Rd8 Nd8 38.e5 Nc6–+) 37...Nd2 38.Nd2 (38.Rb6 Nc4 39.Rc6 Rd4–+) 38...Rd2 39.Rc1 (39.Kg1 f5–+) 39...Ne5 40.f4 (40.Rc8 Kh7 41.Kg1 Nd3–+) 40...Nd3 41.Rc8 Kh7 42.f5 (42.g3 Nf2 43.Kg2 Ne4 44.Kf3 f5–+) 42...Nf2 43.Kg1 (43.Kh2 Ne4 44.fe6 fe6–+) 43...Ne4 44.fe6 fe6 45.Re8 Rd1 46.Kh2 0–1. Hernandez Ayala,J (1645) – Candamil Neira,Gabriel A (1800), Pasao op, 1997.

7.Bb5 Be7 8.0–0=+.

7.ab5 Ra1

8.Ba1 c5 9.Be2 d5 10.0–0 Be7 11.c4 0–0 12.d4 Nbd7 13.Nbd2 Ne4 14.Qc2 f5 15.Rd1 g5 (15...Bf6 16.Bb2=) 16.Ne1 g4 (16...Bf6 17.cd5 Bd5 18.Bc4+=) 17.Ne4+/– de4 18.d5 e5 (18...ed5 19.cd5 Bd6 20.Bc4=) 19.f3 Bh4? (better is 19...ef3!? 20.gf3 Bd6+=) 20.fe4+– Qg5 Black prepares the advance g3 21.ef5 (21.g3!? Qe3 22.Kg2 Bg3 23.hg3+/–) 21...Rf5+/– 22.Nd3 Qe3 23.Kh1 e4 (23...Qe4 24.Qd2+=) 24.Nc1 (24.Bg4!? ed3 25.Qb1+= (worse is 25.Qd3 Qd3 26.Kg1 Bf2 27.Kh1 Be1 28.Bd4 cd4 29.h3 Rf1 30.Kh2 Bg3)) 24...g3+= 25.Qc3 Qh6?? (25...Qc3 26.Bc3 h5 27.Be1+=) 26.Qh8 (better is 26.Bg4 Bg5 27.Qh8 Kf7 28.h3+–) 26...Kf7+/– 27.Bg4?? (better is 27.h3 Rf4 28.Bc3+/–) 27...Bf6–+ 28.Bf6 (28.h3 Bh8 29.Bf5 Ba1 30.Bd7–+) 28...Qh2 0–1. Khakimzianov,Rinat – Tugarin,Rashid, Ufa Cup, 2007.

8.Ba1 Bc5 9.Be2=.

8.Ba1 c6 9.c4 cb5 10.cb5 Bc5 11.Be2 Ne4 12.0–0+= Qc7 (12...0–0 13.d3 Nf6 14.Qa4+=) 13.d3 (better is 13.Bg7 Rg8 14.Bb2+/–) 13...Nd6? (better is 13...Nf6!?+=) 14.Bg7+– Rg8 15.Be5 Bf3 (15...f6 16.Bf6 Nf7 17.Nbd2+–) 16.Bf3 Qd8?! (16...Rg5 17.Bf4 Rf5+–) 17.d4 Qg5 (17...Nc4 18.Bb8 Qb8+–) 18.Bf4 Qg6 (18...Qd8 19.dc5 Nb5 20.Qd3+–) 19.dc5 Nf5 (19...Nb5 20.Bb8 bc5 21.Qa4+–) 20.Bb8 Nh4 21.cb6 Ng2 (21...Qf5 22.Bf4 Qb5 23.b7 Ng2 24.Bg3+–) 22.Bg3 Nh4 23.b7 Ke7 24.Qd6 Kf6 25.Qd4 Ke7 26.Qh4 (26.Qh4 Qg5 27.Qg5 Rg5 28.b8Q+–) 1–0. Janek – Cururo, internet free game, 2017.

8.Ba1 c6 9.c4 cb5 10.cb5 Be7 11.Nc3 0–0 12.Be2 d6 13.0–0 Nbd7 14.Na4 e5 15.d3 e4 (15...Qc7!?=) 16.de4+= Ne4 17.Bd4 (17.Nc3 Nc3 18.Bc3 Bf6+=) 17...Nec5 (17...Bf6 18.Bc4=) 18.Qa1 Nb3 19.Qb2 Nd4 20.Nd4 Bf6 21.Qd2 (21.Qb4 Nc5=) 21...Nc5 (21...Qa8!? 22.Ra1 Bg2–/+) 22.Nc3= Bd4 23.Qd4 Qg5 24.f3 Rd8 25.e4 Ne6 26.Qb6+/– Ba8 27.Bc4 Nf4 28.Rf2?? Nh3–+ 29.Kf1 Nf2 30.Kf2–/+ Qd2 31.Ne2= Rf8 32.Qd4 Qg5 33.Qd6 Qh4 34.Ke3 Qg5 35.Qf4? Qc5–/+ (36.Kd3 Rd8 37.Kc3 Qa3 38.Kc2 Qa4 39.Kc3 Qa1 40.Kc2 Qd1 41.Kc3 Rd7–/+) 0–1. eds – maxim, Live Game Caissa's Web, 2004.

8.Ba1 c6 9.c4 c5 10.Nc3 Be7 11.Be2 d5 12.d4 cd4 13.ed4 (13.Qd4!? Bc5 14.Qh4=) 13...dc4+= 14.Bc4 Bf3 (14...Qc7 15.Be2–/+) 15.Qf3+= Qd4 16.Qb7 (better is 16.Be2!?+=) 16...0–0–+ 17.0–0? (better is 17.Qe7!? Qc4 18.Qa3–+) 17...Qc4?? (better is 17...Bb4 18.Be6 fe6–+ (18...Bc3?! 19.Bc3 Qc3 20.Bf7 Kh8 21.Qb6–+)) 18.Qe7–/+. GuestRTFM – GuestFJXF, freechess.org, 2018.

8.Ba1 Nd5 9.c4 Nb4 10.Be2 d5 11.0–0 dc4 12.Bc4 Nd7 13.Bc3 Qa8 14.Qb3 (14.Be2 Qa5+=) 14...Nd5 (14...Bf3 15.gf3 Nd5 16.f4=) 15.Be2+= N5f6 16.d4 Ng4 (16...Bd5 17.Qc2+=) 17.Nbd2+/– Bd6 18.Ra1 Qb8 19.Bc4 h5 20.h3 Nh6 (20...Ngf6+/–) 21.Be6 (better is 21.e4!?+/–) 21...fe6+= 22.Qe6 Kd8 23.Qg6 Rg8 24.d5 Bf8 (24...Be7 25.Bg7 Nf5 26.Qf5 Rg7 27.Nd4+/– (27.Qh5?! Nf6 28.Qe5 Bd5+=)) 25.Ng5 Bd5 26.e4 Bb7 27.Rd1 c5 28.bc6 Bc6 29.Qc6 Qf4 (29...Qd6 30.Qd6 Bd6+–) 30.Ne6 Ke7 (30...Ke8 31.Nf4 Rh8 32.Nf3 Be7 33.Qd7 Kf8 34.Ng6 Kg8 35.Qe8 Bf8 36.Qf8 Kh7 37.Qg7) 1–0. DEFFM – GuestXFGM, freechess.org, 2018.

8.Ba1 d6 9.Nc3 Nbd7=.

8.Ba1 d6 9.c4 Nbd7 10.d4 Be7 11.Be2 Qa8 12.Nbd2 0–0 13.0–0 Bf3 14.Bf3 Qa4?? (better is 14...d5+=) 15.Qa4+– 1–0. GuestLCTP – GuestNTamfe, freechess.org, 2017.

8.Ba1 d6 9.c4 Nbd7 10.Be2 Be7 11.0–0 0–0 12.d3 Nc5 13.Nbd2 Qa8 14.e4 Qa3 15.Ne1 Nfd7 16.Nc2 Qa5 17.Nf3 Ra8 18.Qb1 Qa2 19.Re1 Bf6 20.Bf6 Nf6 21.Nb4 Qa3 22.Nd4 Qc3 23.Ndc6 Bc6 24.Nc6 Nb3 (24...Nb3 25.Rd1 e5+=) 0–1. Margareto Kaohrmann,Eduardo (1940) – Jerez Perez,Alfonso (2365), Barcelona op rap rapid, 1996. (=1.Nf3 b6 2.b4 Bb7 3.e3 e6 4.Bb2 Nf6 5.b5 a6 6.a4 ab5 7.ab5 Ra1)

8.Ba1 d6 9.c4 Be7 10.Be2 0–0 11.d4 (11.Nc3 Nbd7=) 11...Nbd7 (11...c5 12.bc6 Nc6 13.0–0=) 12.0–0 (12.Nc3 d5=) 12...Qa8 (12...d5 13.cd5 Nd5 14.Nc3=) 13.Nbd2 (13.Nc3 c5=) 13...Ne4 (13...Qa2 14.Bd3=) 14.Bb2 Qa2 (better is 14...Ndf6!?=) 15.Qc2+/– Nd2 16.Nd2 (worse is 16.Qd2 Ra8=) 16...Ra8 (16...Qa8 17.Ra1 Qc8 18.h3+/–) 17.Ra1 Qa1 18.Ba1 Ra1 19.Nb1 (19.Nf1 Nf6+/–) 19...g6 (19...Nf6 20.Bf3 d5 21.g4+/–) 20.Qb2 (20.Bf3 Bf3 21.gf3 Nf6+–) 20...Ra5 (20...Ra8 21.Nc3+/–) 21.h3 (21.Nc3+/–) 21...Bf6 (21...d5 22.Bf3+/–) 22.Nd2 (22.Nc3 Ra8+–) 22...Nc5 (22...Be7 23.Bf3 d5 24.Qc3+/–) 23.Bf3+– Bf3 24.gf3 (24.Nf3 Ne4+–) 24...Nd7 25.Kg2 e5 26.Nb3 Ra4 27.Qc2 (27.de5 Be5 28.Qc2 Kg7+–) 27...ed4 28.Nd4 (better is 28.ed4 Nf8 29.f4+/–) 28...Ra8? (better is 28...Rb4!?+/–) 29.Qe4+– Rb8? (29...Ra4 30.Ne6 Nc5 31.Nc5 dc5+–) 30.Qc6 (30.Qc6 Nc5 31.Qc7+–) 1–0. Levin,Anatoly – Zhou Weiqi (2385), Internet Section, 2004.

8.Ba1 Bd6 9.c4 (9.Be2 0–0=) 9...c5 (9...0–0 10.Nc3+=) 10.Be2= e5 (10...0–0 11.0–0=) 11.d3 (11.Ne5 Bg2 12.Rg1 Be4 13.Rg7 Bg6+/–) 11...Qe7 (11...0–0 12.0–0 Qe7 13.Qa4+=) 12.e4+= Bc7 (12...0–0 13.0–0+=) 13.Nbd2 d6 14.0–0 h6 (14...0–0 15.Bc3+=) 15.Qc2 Nbd7 16.Bb2 Bb8 (16...0–0 17.Ra1+=) 17.Ra1+/– g5 (17...0–0 18.Bc3+/–) 18.h3 (18.Bc3+/–) 18...Nh5 (better is 18...g4!? 19.hg4 Ng4+/–) 19.Ne5+– de5 20.Bh5 Nf6 21.Qd1 (21.Be2 Qd6+–) 21...Rg8 (21...Qd6 22.Be2+–) 22.Nf1 (22.Bg4 Qd6 23.Ra3 Ng4 24.Qg4 Bc7+–) 22...Qd7 23.Ng3 g4 24.hg4 Ng4 25.Qf3 (25.Nf5 Nf6 26.Nh6 Rf8+–) 25...Rg5 26.Bg4 (26.Bc1 Rg7+–) 26...Qg4 27.Qg4 Rg4 28.Nf5 Rg6 29.f3 (29.Bc1 h5+–) 29...f6 (29...Bc8 30.Ra8 Bd6 31.Rc8 Kd7 32.Nd6 Rd6 33.Be5 Rd3 34.Rc6+–) 30.Kf2 Rg8 (30...Bc8+–) 31.Nh6 Rh8 32.Ng4 (32.Nf5 Rh2+–) 32...Kf7 33.g3 (33.f4 ef4 34.Bf6 Re8+–) 33...Bc8 34.Kg2 (34.Ke3 Rh3 35.Ra8 Bg4 36.fg4 Bd6+–) 34...Ke7 (34...Bg4 35.fg4 Ke6 36.Bc1+–) 35.Ne3 Bh3 (35...Ke6 36.Nd5+–) 36.Kf2 (36.Kg1 Ke6+–) 36...Be6 37.g4 Rh2 38.Ng2 Rh8 (38...Kd6 39.Kg3 Rh6 40.f4+–) 39.Bc3 Rd8 (39...Rh2 40.Kg3 Rh6 41.f4+–) 40.Ke3 Rh8 (40...Bc7 41.Ra7 Kd6 42.Bd2+–) 41.Ra6 Bd6? (41...Bc7+–) 42.Rb6 Rh3 (42...Rd8 43.Ra6+–) 43.Rb7 Kf8 (43...Bd7 44.Ra7+–) 44.Kf2 Bg4 (44...Rh2 45.Kg3 Rh1 46.f4+–) 45.fg4 Rd3 46.Be1 Rd4 47.Ne3 Re4 48.Rd7 (better is 48.Nf5 Rf4 49.Ke2 Re4 50.Kf1 Rd4+–) 48...Rd4 (48...Rf4 49.Ke2 Rd4 50.Nf5 Re4 51.Kd2+–) 49.Nd5 Be7 50.Re7 (50.g5!? Rd5 51.Rd5 fg5+–) 50...Rd5 51.cd5 (better is 51.Re6 Rd1 52.Rf6 Ke7+–) 51...Ke7 52.Ke3 Kd6 53.Ke4 c4 (53...Ke7 54.Bh4 Kd8 55.Bf6 Ke8 56.Ke5+–) 54.Bb4 (54.Bb4 Kd7 55.Kf5+–) 1–0. Holz auf der Heide,Gerhard – Keller,Ralf, Leipzig VfB op 4th, 1997.

8.Ba1 Be7 9.c4 Bf3 10.Qf3+= 0–0 11.Bd3 d5 12.0–0 Nfd7? (better is 12...c5!?=) 13.cd5+/– Nc5 (13...ed5 14.Qd5 Nc5 15.Qd8 Rd8 16.Bc4+–) 14.Bc4+– ed5 15.Bd5 Bf6 (15...Nbd7 16.d4 Nf6 17.Bc6+–) 16.d4 (16.Bf6 Qf6 17.Qf6 gf6+–) 16...Ne6 17.Nc3 Ng5 18.Qg3 Nd7 (18...Re8+–) 19.f4 Ne6 20.Ne4 (20.f5!? Nd4 21.ed4 Bd4 22.Kh1 Be5+–) 20...Qe7 21.Qg4 Nb8 22.f5 Ng5 (22...Nd8 23.Qg3 Kh8 24.Nf6 gf6 25.e4+–) 23.Nf6 Qf6 (23...gf6 24.e4 h5 25.Qh5+–) 24.h4 Qd6 25.Bc4 (25.Qg5?! Qd5 26.f6 Qg5 27.hg5 gf6 28.gf6 Nd7+–; 25.hg5?! Qd5 26.e4 Qb5+/–) 25...Qb4 (25...Nh3 26.Qh3 Nd7 27.e4+–) 26.d5 (26.Qg5?! h6 27.Bf7 Kf7 28.Qg6 Kg8 29.Qe6 Rf7 30.Qc8 Rf8 31.Qc7 Qb5+–; 26.hg5?! Qc4 27.f6 Re8+/–) 26...Qd2 (26...Nd7+–) 27.Qg5 f6 28.Bf6! Rf6 (28...Rf6 29.d6 Double attack) 29.d6 Kf8 30.dc7 Nd7 31.c8Q Ke7 32.Qg7 (32.Qg7 Rf7 33.Qf7 Kd6 34.Qe6) 1–0. GuestQTZV – GuestNCQF, freechess.org, 2017.

8.Ba1 Be7 9.Bd3 d5=.

8.Ba1 Be7 9.Be2 0–0 10.0–0 (10.Bb2 c5=) 10...Ne4 (10...d5!?=) 11.d3+= Bf6 (11...Nd6 12.c4+=) 12.c3 (12.Bf6 Nf6 13.Nc3 d6+=) 12...Nc5 (12...Nd6 13.Qa4+=) 13.Nbd2+= Re8 (13...d5 14.Qc2+=) 14.Qc2 (14.d4 Ne4+=) 14...e5 15.d4 e4 16.Ne1 (16.dc5 ef3 17.Bf3 Bf3 18.Nf3 bc5+=) 16...Ne6 17.c4 g6 (17...d5 18.Bb2+=) 18.Bg4 (18.f3 ef3 19.Bf3 Bf3 20.Nef3 Qe7+=) 18...Nf8 (18...Ng7 19.Bc3+=) 19.Qa4+= d6 (19...Ne6 20.Nc2+=) 20.Nc2 (20.Qa7!? Bc8 21.Be2+/–) 20...Nbd7+= 21.Nb4 Bg7 (21...Bg5 22.Nc6 Qa8 23.Qa8 Ba8 24.Bc3+/–) 22.Qa7 (22.Be2!?+=) 22...Qa8= 23.Qa8 Ra8 (worse is 23...Ba8 24.Bc3+=) 24.Bb2 (24.Bc3=) 24...Ra4 (24...f5 25.Be2=) 25.Bc3 (25.Bd1!? Ra7 26.Nd5+=) 25...Ra3= 26.Nb1 (26.Bb2 Ra4 27.Bd1 Ra5+= (worse is 27...Rb4 28.Bc3+/–)) 26...Ra8 27.Bd1 Ne6 28.Bb3 Kf8 (28...Bf6 29.Rc1=) 29.Rc1 Ke7 (29...f5 30.c5 bc5 31.Be6 cb4 32.Bb4=) 30.Rc2 (30.Nc6 Kf8=) 30...f5 (30...Ke8 31.Bb2=) 31.Ra2 Ra2 32.Ba2 Nb8 (32...Nf6 33.Nc6 Ke8 34.Bb3=) 33.Kf1 (33.Bb2 Nd7=) 33...g5 (33...Kf7 34.Ke2=) 34.Bd2+= Kd7 (34...Nd7 35.Nc3+=) 35.Nc3 Nd8 (35...Ke8!?+=) 36.Nbd5+/– Bd5 (36...Ne6!?+/–) 37.Nd5+– Ne6 (37...h5 38.f3+–) 38.Bb1 (38.g4 fg4 39.Bb1 Nf8+–) 38...Kd8 (38...g4 39.f3! gf3 40.gf3+–) 39.g4! fg4 40.Be4 h6 (40...Nf8 41.Bf5+–) 41.Bf5 Nf8 42.Bg4 Nbd7 (42...Ng6 43.Ke2+–) 43.Bf5 (43.f4 Ng6 44.fg5 hg5+–) 43...Nf6 44.Nb4 Ke7 45.Na6 Kd8 (45...Ne8 46.Ke2+–) 46.f3 (46.Ke2 Ng8+–) 46...N8d7 (46...d5 47.c5 N8d7 48.c6+–) 47.Be1 (47.Nb4 Ng8+–) 47...Bf8 (47...Ng8 48.Bg4+–) 48.Nb4 Ke7 (48...Be7 49.Nc6 Ke8 50.Bg6 Kf8 51.Bb4+–) 49.h3 (better is 49.Nc6 Kf7 50.e4 Bg7+–) 49...Bg7 50.Bg3 (50.h4 Nf8+–) 50...Bh8 (50...Nf8 51.h4+–) 51.Ke2 Nh5 (51...Nf8 52.h4+–) 52.Bh2 (52.Be1 Nhf6+–) 52...Nhf6 (52...Ndf6 53.Bg6+–) 53.Kd3 Bg7 (53...Ng8 54.f4+–) 54.e4 Ng8 (54...Nf8 55.c5! dc5 56.Nc6 Kf7 57.Bc7 cd4 58.Ne5 Ke8 59.Bb6+–) 55.Nc6 (55.f4 gf4 56.Nd5 Kd8 57.Nf4 Nf8+–) 55...Ke8 56.Be6 Ngf6 (56...Ne7 57.e5 de5 58.Bd7 (58.Ne5?! Ne5 59.de5 Ng6+–) 58...Kd7 59.Ne7 (59.Ne5?! Kd8+–; 59.Be5?! Be5 60.Ne5 Ke6+/–) 59...Ke7 60.Be5 Be5 61.de5+–) 57.Ke3 Nf8 58.Bf5 N6d7 59.Bg3 (59.Nb4 Bf6+–) 59...Bh8 (59...Kf7 60.h4+–) 60.h4 (60.f4 Kf7+–) 60...Bf6 (60...Kf7 61.hg5 hg5 62.Bd7 Nd7 63.e5+–) 61.e5 (better is 61.hg5!? hg5 62.Bg4 Kf7 63.Bh5 Kg8+–) 61...de5 62.de5 gh4 63.Bh2 (63.Bf4 Bg5 64.e6 Nf6+–) 63...Be7 64.Ne7 (64.Bf4 Ba3 65.Kd4 Nc5 66.Bh6 Nfe6 67.Kd5 Kf7+–) 64...Ke7 65.f4 Nc5 66.Bg1 (better is 66.Bg4+–) 66...h3? (better is 66...Kf7+–) 67.Bh3 Ng6 (67...Nfe6+–) 68.Bh2 1–0. Hepting,Heinrich (2205) – Goetz,Andreas(66SCH) (2160), LLN_SKSchwab1 – SFFue1_R7_BY00/01, 2001.

8.Ba1 Be7 9.Be2 d6 10.d4 Nbd7 11.0–0 0–0 12.c4 Ne4 13.Nc3 Ndf6 14.Nd2 Nc3 15.Bc3 Qa8 16.f3 d5 (16...Qa2 17.Qb3 Qb3 18.Nb3=) 17.Qb3 (17.Qc2 Bd6+=) 17...Qa3 18.Ra1 Qb3 19.Nb3 dc4 20.Bc4 Ra8 21.Ra8 Ba8 22.e4 Kf8 23.Nd2 Ke8 24.Kf2 Kd7 25.Ke3 Ne8 26.Bd3 c6 (26...Nd6 27.g4+=) 27.Nc4+/– Kc7 28.Ne5 f6 29.Nc6 Bc6 30.bc6 Kc6 31.g3 b5 32.Bc2 Nc7 33.Bb3 b4 34.Bb2 g6 35.g4 (35.Kd3 Kb5+/–) 35...g5 36.Be6 (36.Kd3!?+=) 36...Ne6= 37.d5 Kd6 38.de6 Ke6 39.Kd3 Bd6 40.h3 (40.Kc4!?=) 40...Be5–/+ 41.Bc1 b3 42.Be3 Kd6 43.Bf2?? (better is 43.Bb6–/+) 43...Kc6–+ 44.h4 h6 45.h5? (45.Be1 Kb5 46.hg5 fg5 47.Bd2–+) 45...Kb5 46.Ba7 (46.Be3 Kb4 47.Bc1–+) 46...Kb4 47.Be3 Ka3 48.Bc1 Ka2 49.Kc4 Bf4 50.Bf4 gf4 0–1. Tagirov,Kajum K – Roshal,Mark, 5th Cup Governov B, 2009.

7.ab5 Be7

8.Be2 0–0

9.0–0 c5 10.d3 d5 11.Nbd2 Nbd7 12.c4 h6 13.Ne5 Qc7 14.Ndf3 Bd6 15.Nd7 Nd7 16.h3 e5 17.Qc2 e4 18.de4 de4 19.Qc3 f6 20.Nh4 Be5 21.Qc2 Ra1 22.Ra1 Bb2 23.Qb2 Ne5 24.Rd1 Rd8 25.Rd8 Qd8 26.Qc3 Bc8 27.Kh2 Be6 28.g4 Nd3 29.Kg1 Kh7 30.Ng2 g5 31.Ne1 f5 32.Nd3 ed3 33.Qd3 Qd3 34.Bd3 Kg6 35.Bf5 Bf5 36.gf5 Kf5 37.f3 Ke5 38.Kf2 h5 39.Kg3 Kf5 40.h4 g4 41.fg4 hg4 42.e4 Ke4 43.Kg4 Kd4 44.h5 Kc4 45.h6 Kb5 46.h7 c4 47.h8Q Kb4 48.Qb2 Ka5 49.Kf3 b5 50.Ke3 1–0. phildo (1835) – jimmiels (1765), gameknot.com, 2013.

9.0–0 d5 10.d4 Nbd7 11.Nbd2 Re8 12.c4 Ra1 13.Ba1 Qa8 14.Qc2 c6 15.bc6 Bc6 16.Bb2 Qb7 17.Qb3 (17.Rc1 Rc8+=) 17...Rb8 18.Rc1 Qa8 19.Ra1 Qb7 20.Ne1 (20.Ba3 Ra8=) 20...dc4 21.Bc4 Bd5 (21...b5 22.Bd3=) 22.f3 b5 23.Bd5 Qd5 24.e4 Qb7 25.Nd3 Qb6 26.Nf2 h6 27.Rc1 Re8 28.g3 1–0. Shorokhov,M (2135) – Danilov,Yuri (1785), 14th FIDE Open, Voronezh RUS, 2010.

9.Ra8 Ba8 10.0–0 d5 11.d4 c5 12.c4 Nbd7 13.Nc3 A) 13...Bd6 14.dc5 (14.cd5 Nd5 15.Nd5 Bd5 16.Qc2 f5 17.Rc1 Qe7 18.Bc4 Bf3=; 14.Qd3 dc4 15.Qc4 Qc7 16.dc5 Nc5 17.Qh4 Rc8 18.Nd4 Qd7=; 14.h3 Qc7 15.cd5 Nd5 16.Qd3 c4 17.Qc2 Nb4 18.Qb1 Bf3=) 14...Nc5 15.cd5 Nd5 16.Na4 Qe7 17.Nc5 Bc5 18.Qa4 Rd8=; B) 13...Qc7 14.cd5 (14.dc5 Nc5 15.Na4 Rd8 16.Nc5 Qc5 17.Qd4 dc4 18.Qc5 Bc5=; 14.Qd3 cd4 15.Qd4 dc4 16.Qc4 Qc4 17.Bc4 Rc8 18.Be2 Bb4=) 14...Nd5 15.Nd5 Bd5 16.Qc2 Qb7 17.Bd3 f5 18.Bc4 f4=; C) 13...dc4 14.Bc4 cd4 15.Nd4 Qc7 16.Qe2 Rc8 17.Bd3 Bd6 18.f4 Nc5=.

9.Ra8 Ba8 10.0–0 d5 11.d4 c5 12.c4 Nbd7 13.dc5 Nc5 14.Nbd2 (14.cd5 Bd5 15.Nc3 Bb7 16.Qd8 Rd8 17.Ra1 Bd6 18.Nd4 Rc8=; 14.Bd4 dc4 15.Bc4 Qc7 16.Be5 Qc8 17.Qe2 Ncd7 18.Bd4 Bf3=; 14.Na3 Nfe4 15.Nd4 Bd6 16.Nc6 Qc7 17.cd5 Bh2 18.Kh1 Bd6=) 14...Nfe4 (14...Qc8 15.Be5 Rd8 16.Qc2 Nfe4 17.Ne4 de4 18.Nd2 Nd3=) 15.Qc2 (15.Bd4 Bd6 16.cd5 Nd2 17.Nd2 Bd5 18.f4 Qc7=) 15...Bd6 (15...Nd2 16.Nd2 dc4 17.Rd1 Qc7 18.Qc4 Rd8=) 16.Ne4 (16.Rd1 Qc7 17.cd5 Bd5 18.Nc4 Rd8=) 16...de4 17.Nd2 (17.Nd4 Qh4 18.h3 Rd8=) 17...Nd3 18.Bd3 (18.Bc3!?+= Qg5+=; 18.h3 Nb2+=) 18...ed3–/+ 19.Qc3 (19.Qd3?? Bh2! 20.Kh2 Qd3–+) 19...Qg5 20.g3 Rd8 21.e4 (21.Qd3?? Bg3 22.Qd8 Qd8 23.hg3 Qd2–+) 21...Bf4 (21...f6 22.Ra1 Bf4 23.Nf3–/+) 22.Rd1 Bd2 23.Rd2 Be4 24.Qc1?? (better is 24.f3 Bf5 25.Qe5–/+) 24...Qf5–+ 25.Qd1 Rc8 26.Bd4 (26.f3 Bf3 27.Qe1 f6–+) 26...Rc4 27.Bb6 (27.Be3–+) 27...Qf3 28.Qf3 0–1. pzn2pawn (1855) – IZMOTA (1900), redhotpawn.com, 2016.

9.Ra8 Ba8 10.0–0 d5 11.d4 c5 12.c4 Nbd7 13.Nbd2 A) 13...cd4 14.Bd4 (14.Nd4 Qc7 15.Qc2 Rc8 16.Rc1 Bd6 17.f4 Nc5 18.cd5 Bd5=) 14...Qc7 15.Qa1 Rd8 16.Rc1 Nc5 17.Be5 Qd7 18.Nd4 Bb7=; B) 13...dc4 14.Bc4 (14.Nc4 Bd5 15.Qc2 Qc7 16.Rc1 Rc8 17.dc5 Nc5 18.Nfd2 Nfe4=; 14.Qc2 c3 15.Bc3 Nd5 16.Rd1 Nc3 17.Qc3 Bf6 18.Bd3 cd4=; 14.Qc1 Qc7 15.Nc4 Rc8 16.dc5 Qc5 17.Nce5 Ne5 18.Ne5 Qc1=) 14...cd4 15.Nd4 Bd6 16.Qe2 Qc7 17.f4 Rc8 18.Rc1 Nc5=; C) 13...Qc7 14.cd5 (14.dc5 Bc5 15.Qb1 Rd8 16.Rc1 dc4 17.Bc4 Qd6 18.Rd1 Qc7=; 14.Ba3 Bd6 15.Qc2 Ne4 16.Rd1 Nd2 17.Rd2 dc4 18.dc5 Nc5+=; 14.Qa1 dc4 15.Rc1 Bd5 16.Nc4 Ra8 17.Qb1 Ne4 18.Bd3 Qb7=) 14...Bd5 15.Qc2 Rc8 16.Ra1 Qb7 17.Nc4 Be4 18.Qa4 cd4=.

9.Ra8 Ba8 10.0–0 d5 11.d4 c5 12.c4 Nbd7 13.cd5 A) 13...Nd5 14.Nbd2 (14.Qc2 Qb8 15.dc5 Nc5 16.Be5 Qb7 17.Rd1 Rc8 18.Bc4 Nf6=; 14.dc5 Nc5 15.Qc2 Qc7 16.Be5 Qb7 17.Rd1 Rc8 18.Bc4 Nf6=; 14.Qd2 Qc7 15.Rc1 Rd8 16.Na3 Qb7 17.Nc2 Bd6 18.Bc4 Qc7=) 14...N7f6 15.Qb3 Qc7 16.Rc1 Rd8 17.dc5 Bc5 18.Be5 Qe7=; B) 13...Bd5 14.dc5 (14.Nc3 Bb7 15.Qc2 Bf3 16.Bf3 cd4 17.ed4 Qc7 18.Rc1 Bd6=) 14...Nc5 15.Nc3 Bb7 16.Qd8 Rd8 17.Ra1 Bd6 18.Nd4 Rc8=.

6.a4 c6

7.c4 Bb4 8.Nc3 d5 (8...0–0 9.Be2+=) 9.Be2 (9.cd5 ed5 10.Be2 0–0=) 9...0–0 (9...dc4 10.Bc4 ab5 11.ab5 Ra1 12.Ba1=) 10.0–0 (10.cd5 Nd5 11.0–0 f6=) 10...Nbd7 (10...dc4 11.Bc4 Qd6 12.d3=) 11.Qb3 (11.cd5 cd5 12.Qb3 Qe7=) 11...a5 (11...Bd6 12.d4=) 12.d4 (12.cd5 Nd5 13.Nd5 cd5=) 12...c5 (12...dc4 13.Qc4 cb5 14.ab5=) 13.Na2 (13.cd5 Bc3 14.Qc3 Bd5 15.dc5 Nc5=) 13...dc4 14.Bc4 Bf3 15.gf3 (15.Nb4 Ne4 16.Nd3 Nd2+=) 15...Qc7 (15...Nd5 16.f4=) 16.Nb4 ab4 (16...cb4 17.Rac1 Qb7 18.Kg2=) 17.Kh1 (17.Rfd1 Ra5=) 17...e5 18.Rg1 Kh8 (18...ed4 19.ed4 Rac8 20.dc5 Qc5 21.Rad1 Qc4 22.Qc4 Rc4 23.Rd7+=) 19.Bf7 Black creates threats along the open c–file (19.dc5 Nc5 20.Qb4 Rfd8+=) 19...cd4 20.ed4 e4 (20...ed4!? 21.Bd4 Qf4 22.Bf6 Nf6=) 21.Bc4 (21.Rg2 Qf4+/–) 21...ef3+= 22.d5 (22.Qb4 Ne4 23.Raf1=) 22...Ne5 23.h3?? (better is 23.Be5 Qe5 24.Rad1+= (24.Qb4? Ng4 25.Rg4 Qa1 26.Rg1 Qd4–+)) 23...Qc4 24.Qe3 (24.Qc4 Nc4 25.Bf6 Rf6–+) 24...Ng6 25.Qf3 (25.Bf6 Rf6 26.Qg5–+) 25...Ne4 26.Qg2 (26.Qe3 Qd5 27.Qd4–+) 26...Rf2 27.Rac1 (27.Bg7 Kg8 28.Qg4 Qd5–+) 27...Qd5 28.Rcd1 Ng3 29.Kh2 Rg2 30.Rg2 Qd1 31.Rg3 Rf8 32.Rg2 Qd6 33.Kh1 Rf1 (33...Rf1 34.Rg1 Qd5 35.Kh2 Rf2 36.Kg3 Qf3) 0–1. Dyga,Ryszard – Rotermund,Verena, Karl Mala mem op, 1997.

7.c4 Bb4 8.Be2 0–0 9.0–0 d5 10.d3 ab5 11.ab5 Nbd7 12.bc6 Bc6 13.Nd4 Bb7 14.Nc2 Bd6 15.Nd2 Nc5 16.Nd4 Qd7 17.Qc2 e5 18.N4b3 Rfc8 19.d4 ed4 20.Nd4 dc4 21.Ra8 Ra8 22.Nc4 Bc7 23.Rd1 Qe7 24.Nf5 Qe6 25.Nfd6 Ba6 26.Bf3 Rd8–+ 27.Bf6 Qf6 28.Ne4 Rd1 29.Bd1 Ne4 30.Qe4=+ h6 31.g3 Qc6?? 32.Qc6+– (32.Qc6 g6 33.Qc7 Bc4 34.Qc4 Kf8 35.Bb3 Ke7 36.Qc7 Ke8 37.Qf7 Kd8 38.Be6 b5 39.Qd7#) 1–0. algernon (2325) – coloplayah (2155), net–chess.com, 2007.

7.c4 Bd6 8.Be2 0–0 9.Qc2 (9.0–0 Be7=) 9...Qc7 (9...ab5 10.ab5 Ra1 11.Ba1 cb5 12.cb5=) 10.Ng5 (10.Bf6 gf6 11.ba6 Na6=) 10...h6 (10...e5 11.Bd3 h6 12.Nh7 Nh7 13.Bh7 Kh8 14.Be4+=) 11.h4 (better is 11.Bf6!? hg5 12.ba6 Na6 13.Bg5=) 11...e5+= (11...hg5 12.hg5 cb5 13.Bf6+– (worse is 13.gf6 Bh2 14.fg7 Rc8+–)) 12.Na3? (better is 12.Bf3!?+=) 12...cb5–+ (12...hg5 13.hg5 cb5 14.gf6+/–) 13.ab5 (13.Nf3 b4 14.Nb1 Nc6–+) 13...hg5 14.hg5 Be4?? (14...Ne4 15.Bd3 f5 16.gf6 Nf6 17.Bh7 Kf7 18.Qg6 Ke7 19.Qg7 Rf7+=) 15.d3 Bg6? (better is 15...Bg2!? 16.Rg1 Bb4 17.Kd1 Ne4 18.Rg2 Nd2+/–) 16.gf6+– gf6 17.0–0–0 (better is 17.Bf3!? Ra7 18.Qd2+–) 17...Ba3 (17...Rc8 18.ba6 Ba3 19.Ba3+=) 18.Ba3 ab5 (18...Rc8!? 19.Bf3 Ra7=) 19.Bf8+/– Ra1? (better is 19...Kf8!? 20.Bf3 Ra1 21.Kd2 Ra3+/–) 20.Kd2+– Rd1 21.Bd1 Kf8 22.Qa2 (better is 22.cb5!? Qd6 23.Rh8 Ke7 24.g3+–) 22...bc4 23.Qc4 Qa7? (23...Qc4 24.dc4 Nc6 25.Bc2+/–) 24.Qc8 (better is 24.Qb4 d6 25.Qd6 Kg7 26.Qd8+–) 24...Ke7+/– 25.Rh8 Nc6? (better is 25...Qa5 26.Ke2 Qa2 27.Kf3 Nc6+/–) 26.Qg8?? (better is 26.Bb3!? Kd6 27.Qf8 Kc7 28.Bf7 Bf7 29.Qf7 Qa5 30.Ke2+–) 26...Ke6 (26...Qa5 27.Ke2 Qa2 28.Kf3 Qd5 29.Kg3 Qd3 (29...Bd3?? 30.Qf8 Ke6 31.Bg4 Bf5 32.Qe8 Ne7 33.Bf5 Kf5 34.Qe7+–) 30.Qe8 Kd6+=) 27.Bb3 (27.Qe8 Kd6 28.Bb3 Qa1 29.Qf8 Kc7+/–) 27...d5 28.Qc8 White gets deadly initiative 28...Kd6 29.Qf8 Qe7 (better is 29...Ke6!?+/–) 30.Qa8+– White intends Ba4 30...Qa7 (30...b5 31.Qa6 Qa7 32.Rd8 Ke7 33.Qa7 (33.Qc6?! Qa5 34.Ke2 Qd8+=) 33...Na7 34.Rd5+–) 31.Rd8! Kc5?? (31...Nd8 Theme: Deflection from a7 32.Qa7) 32.Rd5 Kb4 33.Qc6 Kb3 (33...Qa5 34.Qc4 Ka3 35.Ra5 ba5 36.Qa4 Kb2 37.Qa2) 34.Rb5 (34.Rb5 Ka2 35.Qc2 Ka3 36.Qb3) 1–0. Gross – Pelz, NW3–Bad Nauheim, 1984.

7.c4 Be7 8.ba6 Na6 9.Be2=+.

7.Be2 Bb4=.

6.a4 d5

7.c4 Bb4 8.Qb3 Qe7 9.Be2 0–0 10.0–0 dc4 11.Qc4 c5 12.d4 cd4 13.Bd4 Rc8 14.Qd3 Nbd7 15.Nbd2 e5 16.Ne5 Ne5 17.Be5 Qe5 18.Nc4 Qg5 19.g3 Rd8 20.Qb3 Qd5 21.f3 Bc5 22.Rad1 Qe6 23.Kf2 Rd1 24.Rd1 Qh3 25.Rh1 Ng4 26.Kg1 ab5 27.Bf1 Qh6 0–1. hal1958 – JEB_Stuart, playchess.de, 2002.

7.c4 Bb4 8.Be2 dc4 9.Bc4 Qd6 10.Nc3 0–0 11.Na2 ab5 (11...ab5 12.ab5 Bf3 13.gf3 Nbd7=) 0–1. Achtmann,Armin Ludwig – Ebisch,Joachim, DESC Open, 2005. (=1.Nf3 b6 2.b4 Nf6 3.Bb2 a6 4.a4 e6 5.b5 Bb7 6.e3)

7.c4 dc4 8.Bc4 Be7 (8...Bd6 9.0–0=) 9.0–0 c6 (9...0–0 10.d3=) 10.d3 0–0 11.Nbd2 cb5 (11...Ne8 12.ba6 Na6 13.Ne5=) 12.ab5 ab5 13.Bb5 Nbd7 (better is 13...Ra1 14.Qa1 Qd5+=) 14.Ne5?? (better is 14.Ra8 Ba8 15.e4+=) 14...Ne5–+ 15.Be5 (15.Qb3 Qd6–+) 15...Qd5 16.Nf3 Qb5 (16...Ra1 17.Qa1 Qb5 18.Qb1–+) 17.Rb1 Bf3 (better is 17...Qc6–+) 18.Qf3 (18.Rb5 Bd1 19.Rd1–+) 18...Qe5 19.Rb6 Ra1 (19...Ra1 20.g3 Ra3–+) 0–1. Brzoza,Miroslaw – Wantulok,Janusz, corr Poland, 1982.

7.c4 Bd6 8.d4 0–0 9.Nbd2 c5 10.Be2 Nbd7 11.0–0 cd4 12.ed4 Qe7 13.Re1 Rfc8 14.Qb3 dc4 15.Bc4 Nd5 (15...ab5 16.ab5 Bd5 17.Ra8 Ra8 18.Ne5+=) 16.Ba3 (16.ba6!? Bc6 17.Rac1=) 16...ab5+= 17.Bd6 Qd6 18.ab5 N7f6 19.Ne5 Qb4 20.Ndf3 h6 21.h3 Qb3 22.Bb3 Nb4 (22...Ra1 23.Ra1 Nc3 24.Bc4+=) 23.Ra8 Ra8 (worse is 23...Ba8 24.Nf7 Bf3 25.Be6+/–) 24.Rc1 Bd5 25.Bd5 Nfd5 26.Nd2 f6 27.Nec4 Nd3 28.Rb1 Nc3 29.Rb3 Ne2 30.Kh2 Nf2 31.d5 ed5 32.Nb6 Ra1 33.g3 (better is 33.Rb1 Ra2 34.Nf1–+) 33...d4?? (33...Ra2 34.Nf1 Nd4–+) 34.Nd7 Rg1?? (34...Ra7 35.Nc5 Ra2+–) 35.b6+– d3 (35...Rd1 36.b7 Kf7+–) 36.b7 (36.b7 Rg3 37.b8Q Kf7 38.Qf8 Kg6 39.Qe8 Kh7 40.Rb7 Rh3 41.Kg2 Nf4 42.Kf2 Rh2 43.Kg3 Rh3 44.Kf4 g5 45.Kf5 Rf3 46.Nf3 h5 47.Nf6 Kh6 48.Qh5) 1–0. Levin,Anatoly – Schorsch,Emanuel, US Amateur Team–ch East, 2011.

7.Bd3 Be7 8.0–0 0–0 9.Ne5 c5 10.ba6 Na6 11.Bb5 Bd6 12.f4 c4 13.Bd4 Bc5 14.Nc3 Bd4 15.ed4 Nc7 16.Rb1 Qd6 17.Qe2 Nb5 18.Nb5 Qd8 19.Rb4 Qe7 20.Rfb1 Ra6 21.Nc3 Qc7 22.a5 Ra5 23.Rb6 Bc8 24.R6b2 Bd7 25.Rb7+= Qc8 26.Qf3 Ra6 27.R7b2 Qa8 28.Qf1 Qa7 29.Ne2 Bc8 30.d3 ½–½. pcmvr (1975) – lasker (2000), internet, 2007.

7.Be2 Bd6 8.0–0 0–0 9.d3 ab5 10.ab5= Ra1 11.Ba1 c5 12.bc6 Nc6 13.Nc3 Na7 14.Nd4 e5 15.Nf5 Bb8 16.f4 ef4 17.ef4 Bc8 18.Nd4 Re8 19.Qd2 Bd6 20.Bf3 Bg4 21.h3 Bf3=+ 22.Rf3 Qa8 23.Bb2 Bb4 24.Qf2= Nc6 25.Nb3 d4 26.Nb5 Qa7?? (26...Qa7 27.Na7 Be1+–; better is 26...Be1 27.Qf1 Qa2 28.Bd4 Bb4=). MarcosRamos (1610) – lskr (1990), internet, 2007.

6.a4 Be7

7.Nc3 0–0 8.Be2 c6 9.0–0 Qc7 10.h3 d5=+ 11.Qe1 Rd8 12.d3 Bb4 13.Qb1 Bd6 14.Qd1 Nbd7 15.bc6 Bc6 16.Nd4 Bb7 17.Nb1 Bc5 18.Nd2 e5 19.N4b3 Bb4 20.c3 Bf8 21.c4 dc4 22.Nc4 b5 23.Nca5 Bd5 24.ab5 ab5 25.Qb1 Rac8 26.Rc1= Qb6 27.e4 Be6 28.Rc2 Bb4=+ 29.d4 ed4?? 30.Bd4+– Qd6 31.Nb7 Qf4 32.Nd8 Rd8 33.e5 Nd5 34.Qb2 Qg5 35.g3 Bh3+/– 36.Na5 Ba5 37.Ra5 Nf4 38.Rb5 Ne2+/– 39.Re2 Qg4 40.Rb3 Qh5 41.f3 Be6 42.Ra3 Nf8 43.Rd2 h6 44.Qb4 Qg5 45.f4 Qh5 46.Qb1 Bf5 47.Qb7 Qg6 48.Qf3 (48.Qe7 Ne6 49.Qh4 Kh7+= (49...Rd4? 50.Rd4 Nd4 51.Qd8 Kh7 52.Qd4+–)) ½–½. lasker (2195) – Wiacheslav (2100), internet, 2007.

7.Nc3 0–0 8.Be2 d5 9.0–0 c5 10.Ne5 ab5 11.ab5 Ra1 12.Qa1 Qc7 13.Na4 Ne4 14.Qe1 f6=+ 15.Nd3 Bd6 16.Nf4 Bf4 17.ef4 Qf4 18.Nb6 Nd2 19.Qc1 Qd6 20.Qd2=+ Qb6 ½–½. pcmvr (2775) – ppost (2300), net–chess.com, 2008.

7.Nc3 0–0 8.Be2 d6 9.0–0 ab5 10.ab5 Nbd7 11.Nd4 Ra1 12.Ba1 Nb8 (12...d5 13.Qe1=) 13.Bf3+= Bf3 14.Qf3 (worse is 14.gf3 Qd7+=) 14...Nfd7 (14...e5 15.Nb3+=) 15.Qh3 Nc5 16.f4 Bf6 17.Nde2 g6 18.d4 Nb7 19.Ne4 (19.e4 Na5+=) 19...Bg7 (19...d5 20.Nf6 Qf6 21.e4 de4 22.d5=) 20.Bc3 (20.d5!? ed5 21.Bg7 Kg7 22.N4c3+/–) 20...d5= 21.Ng5 h6 22.Nf3 Nd7 23.Bb4 Re8 24.Ra1 Na5 25.Ne5 Ne5 26.de5 Nc4 27.Nd4 Kh7 28.Nc6 Qd7 29.Bc3 (29.Rd1 Nb2 30.Rd2 Nc4+=) 29...Rg8 (29...Nd6 30.ed6 Bc3 31.Ra3=) 30.Kf2 Bh8 (30...Bf8 31.Qg4+=) 31.Qh4 g5? (31...Re8 32.Bd4+/–) 32.Qh5 (32.fg5 Rg5 33.Ra8 Rg8 (33...Ne5?? 34.Rh8 Kh8 35.Ne5 Rf5 36.Kg1 Qb5 37.Nf7 Kg8 38.Nh6 Kf8 39.Qd8 Qe8 40.Bg7 Kg7 41.Qe8+–; 33...Be5?? 34.Be5 Ne5 35.Rd8+–) 34.Rg8 Kg8 35.Qh6 Bg7+–) 32...Qe8 (32...gf4 33.ef4 Nd6 34.Qh3 Ne4 35.Kg1+/–) 33.Ra7+– Qd7 (33...gf4 34.ef4 Qd7 35.g4+–) 34.g4 (34.Qd1 Bg7+–) 34...d4 (better is 34...gf4 35.ef4 Bg7+–) 35.Bd4 Rg6 36.Qh3 (36.Ra8 Rg8 37.Rg8 Kg8 38.Qh6 gf4 39.ef4 Na5 40.Qg5 Bg7 41.Qd8 Qd8 42.Nd8 Nc4+–) 36...gf4 37.ef4 Na5 38.Qd3 (38.Qc3 Nc6 39.bc6 Qd8+–) 38...Nc6 39.bc6 Qd8?? (better is 39...Qc6 40.Kg3 Kg8+–) 40.h3 Bg7 (40...Qb8 41.Rb7 Qd8 42.Bb6 Qh4 43.Kf1+–) 41.Kg3 (better is 41.Bb6 Qb8 42.Rb7 Qf8 43.Rc7 Qe8+–) 41...Bf8 (41...Qc8+–) 42.Bb6! Qb8 (42...cb6 43.Qd8 Double attack (43.Qd8 Discovered attack; 43.Qd8 Decoy)) 43.Rb7 (43.Rb7 Qe8 44.Rc7+–) 1–0. zrenjanin (1990) – baitang (1980), gameknot.com, 2015.

7.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 a6 7.a4).

7.Be2 0–0 8.0–0 c6 9.Nc3 d5=.

7.Be2 0–0 8.0–0 c6 9.c4 ab5 10.ab5 Ra1 11.Ba1 d5 12.Nc3 dc4 13.Bc4 c5 (13...cb5 14.Nb5 Bf3 15.Qf3 Qd2 16.Rd1=) 14.Ne5 Nbd7 (14...Qd6 15.d4=) 15.f4 Qc7 (15...Ne5 16.fe5 Nd7 17.d4=) 16.Nd7 Qd7 17.Na4 Qc7 (17...Qd8 18.d4=) 18.Be5 Bd6 (18...Qd8 19.d4 Nd7 20.Qg4 Ne5 21.fe5+=) 19.Bf6+= gf6 20.Be2 (20.d4 Kh8+=) 20...Ra8= 21.Nb2 (21.Nc3 f5=) 21...Qd7 22.Nc4 Bc7 ½–½. Perlitz,Heiko – Woelfelschneider,Peter, TT–10 ETC, 2003.

7.Be2 0–0 8.0–0 c6 9.c4 d5 10.d3=.

7.Be2 0–0 8.0–0 c6 9.c4 d6 10.d4 ab5 11.ab5 Ra1 12.Ba1 cb5 13.cb5 Nbd7 (13...Bf3 14.Bf3 d5 15.Qd2=) 14.Nbd2 (14.Nc3 Qa8=) 14...Qc7 15.Qb1 Rc8 16.Bd3 (16.Bb2 Qd8=) 16...h6 (16...d5 17.Bb2=) 17.Bb2 d5 18.Rc1 Qb8 19.Rc2 Rc2 20.Qc2 Qc8 (20...Bd6 21.Bc3=) 21.Kf1 (21.Qb3 Qf8+=) 21...Qc2= 22.Bc2 Kf8 23.h3 Bb4 (23...Ke8 24.Ke2=) 24.Ke2 Ke7 25.Nb1 Ne4+= 26.Ba3 Ba3 27.Na3 Nd6 28.Nd2 Nf6 29.Ndb1 (29.Bd3 Nde4+=) ½–½. Glenne,Bjorn Erik (2250) – Ernst,Thomas (2485), Gausdal Int, 1994.

7.Be2 0–0 8.c4 Ne4 (8...d5 9.0–0=) 9.0–0 f5 (9...Nd6 10.d3=) 10.d3 Bf6 11.Qc2 Bb2 12.Qb2 Nf6 13.Nbd2 (13.d4 d6+=) 13...d6= 14.d4 Qe7 (14...Nbd7 15.a5+=) 15.a5+= ab5 (15...ba5 16.Ra5 ab5 17.Ra8 Ba8 18.cb5+=) 16.ab6 cb6 17.Ra8 Ba8 18.Qb5 Qa7 (18...Qc7 19.Ng5 Re8 20.Bf3 Bf3 21.Ngf3+=) 19.Rb1 Nbd7 20.Bd1 (20.Ng5 Re8+=) 20...Ne4 21.Qb2 h6 (21...Bc6 22.Ne4 Be4 23.Ra1+/–) 22.Ne4 (22.Bb3 Nd2 23.Nd2 Qb7+=) 22...Be4 23.Ra1 Qc7 24.Nd2 Bc6 ½–½. Wise,D – FNS, TSCongress, 1972.

5.Nf3 Bb4

6.a3 Bd6 7.Be2 a6 8.a4 ab5 (8...0–0 9.0–0=) 9.ab5 Ra1 10.Ba1 0–0 11.h3 (11.0–0 Ng4 12.h3 Nf6=) 11...Ne4 (11...Qe7 12.0–0=) 12.d3 (12.0–0 Bb4=) 12...Ng5 (12...Nc5=) 13.Nd4 (13.0–0 c6=) 13...Be7 (13...Bg2 14.Rg1 Bh3 15.f4+=) 14.e4 (14.0–0 e5 15.Nf5 Bf6+=) 14...e5 (14...f5 15.h4 Nf7 16.ef5 Bg2 17.Rg1=) 15.Nf5= Bf6 (15...f6 16.Nc3=) 16.0–0+= d6 (16...Ne6 17.Nc3=) 17.c4 (17.Nc3 Ne6+=) 17...Nd7 (17...Bc8 18.Nc3+=) 18.Nc3 Nc5 (18...Ne6 19.Nd5+=) 19.Nd5 Bd5 (19...Nge6 20.f4 Bd5 21.fe5 (worse is 21.cd5 Nf4 22.Rf3 g6 23.Nh6 Kh8–/+) 21...de5 22.cd5=) 20.ed5 (20.cd5 h6 21.Qc2+/–) 20...Qd7 (better is 20...h6!?+=) 21.Bg4+– Qd8 22.h4 g6 (22...Nge6 23.de6 fe6+–) 23.Ng3 (23.hg5 Bg5 24.Ng3 f5+–) 23...Nh3 (23...Bg7 24.hg5 Qg5+–) 24.Bh3 (24.gh3?! h5 25.Bf3 Bg7+–) 24...Bh4 (24...Re8 25.h5+–) 25.Ne4 (25.d4!? Bg3 26.fg3 ed4 27.Qd4 f6+–) 25...Nd7 (25...f5 26.Nc5 bc5 27.Bc3+–) 26.f4 (better is 26.d4 f5 27.de5 de5 28.d6+–) 26...ef4?! (26...f5+–) 27.Rf4 (better is 27.Bd7 Qd7 28.Bf6 g5+–) 27...Qg5 1–0. GuestCBBK – GuestTSGK, freechess.org, 2016.

6.a3 Be7 7.Nc3=.

6.c3 Be7 7.a4 0–0 (7...c6 8.d4 (8.Be2 0–0 9.0–0 a6 10.d4 ab5; 8.Ba3 a6 9.d4 ab5 10.ab5 Qc7; 8.Bd3 0–0 9.0–0 a6 10.Na3 d5) 8...a6 9.Bd3 ab5 10.ab5 Ra1; 7...a6 8.Be2 (8.Bd3 0–0 9.0–0 c5 10.c4 d5; 8.Bc4 0–0 9.0–0 d5 10.Be2 c5; 8.d3 0–0 9.Be2 Re8 10.e4 e5) 8...0–0 9.0–0 d5 10.d4 c5; 7...c5 8.Be2 (8.c4 0–0 9.Be2 d5 10.0–0 a6; 8.d4 0–0 9.dc5 bc5 10.Be2 d5; 8.Na3 a6 9.ba6 Na6 10.Be2 0–0) 8...0–0 9.0–0 a6 10.ba6 Na6) 8.Be2 (8.d3 a6 9.Be2 Re8 10.0–0 d5; 8.Bd3 a6 9.0–0 c5 10.c4 d5; 8.Bc4 a6 9.0–0 d5 10.Be2 c5) 8...c5 (8...a6 9.0–0 d5 10.d4 c5) 9.0–0 d5 10.d3 (10.d4 Nbd7) 10...a6 11.Qb3 ab5 12.ab5 Ra1 13.Ba1 Nbd7 14.c4 dc4 15.dc4 Bd6 16.Rd1 Qb8 17.h3 e5 18.Nh2 e4 19.Nf1 Qc7 20.Qc2 Ra8 21.Bb2 Qb8 22.Nc3 Be5 23.Bg4 Ng4 24.hg4 Qe8 25.g5 Qe7 26.Nd5 Bd5 27.Rd5 Bb2 28.Qb2 g6 29.Ng3 f5 30.Ne2 Ra7 31.Nf4 (31.Ng3!?=) 31...Qg5+= 32.Rd6 Qe7 33.Re6 Qf7 34.Rc6 Qg7 35.Qd2 g5 36.Nh3 Ra8 (36...Qe5 37.g3 g4 38.Nf4=) 37.Re6 Rf8 (37...g4 38.Qd5 Ra1 39.Kh2 g3 40.fg3+–) 38.Qd5 Kh8 39.Qd6 g4 40.Re7 Qa1 (40...Rf7!? 41.Rf7 Qf7+=) 41.Kh2+/– Nf6 42.Ng5 g3 43.Kg3 (43.Qg3?? Ng4 44.Qg4 fg4 45.Nf7 Kg7 46.Nd6 Kg8 47.Ne4 Qa2–+) 43...Qh1 44.Qe5 Kg8 45.Nh3 Nh5 46.Kh4 Qg2 47.Qe6 Kh8 48.Rh7 Kh7 49.Ng5 Kg7 50.Qd7 Kg6 51.Qh7 Kf6 52.Qh6 Ke7 53.Qe6 Kd8 54.Kh5 Qf2 55.Qb6 Kd7 56.Qb7 Ke8 57.Qc8 Ke7 58.Qc5 Ke8 59.Qc8 Ke7 60.Qe6 Kd8 61.c5 Qe2 62.Kg6 Qb5 63.Qd6 Ke8 64.Qe5 Kd7 65.Qg7 Kc6 66.Qf8 Qc5 67.Qc5 (worse is 67.Qf5 Qe3 68.Ne4 Qg1 69.Kh6 Qc1 70.Kg7 Qc4+–) 67...Kc5 68.Kf5 (68.Kf5 Kc4 69.Ne4+–) 1–0. Buczinski,Henryk (2200) – Aymard,Michel (2030), DJ–CT18/pr37, 2011.

6.Be2 a6 7.a3 Be7 8.a4=.

6.Be2 Ne4 7.0–0 0–0 8.d3 Ng5 9.Nc3 Bd6 10.e4 Nf3 11.Bf3 Qh4 12.g3 Qh3?! 13.Bc1!! h6?? 14.Bg2! Qg2 15.Kg2 a6 16.Qg4 g5 17.Bg5! f5 18.Qh5 hg5 19.Qg5 Kf7 20.h4 f4 21.h5 Rg8 22.Qh4 e5 23.Kf3 Bc5 24.h6 Bd4 25.Qh5! Kf6 26.Qf5 Ke7 27.Qh7 Kd6 28.Qg8 Nc6 29.Qa8!! Ba8 30.bc6 1–0. Trkn – Andy J, itsyourturn.com, 2000.

6.Be2 h6 7.0–0 0–0 8.Nc3 Nh7 (8...a6 9.ba6 Na6 10.Nb5=) 9.Ne5 (9.a3 Bc3 10.Bc3 a6+=) 9...Qg5 10.Bf3 (10.Ng4 a6=) 10...Bf3 (10...d5 11.Nd3 Bd6 12.a4=) 11.Qf3+= d5 12.Nd5 ed5 13.Qd5 c6 14.bc6 Na6? (better is 14...Nf6 15.Qc4 a5+= (worse is 15...Bd2 16.Rad1+/–)) 15.Qc4+– Rae8 (15...Bd6 16.f4 Qd8 17.Qa6 Be5 18.Be5 Qd2 19.Qd3+–) 16.f4 (16.d4 Bd6 17.Qa6 Be5 18.de5 Rc8+–) 16...Qf5 (16...Qe7 17.Qa6 Bd2 18.Bd4+–) 17.c3 Bd6 18.Qa6 Be5 19.fe5 Qe5 (19...Qc8 20.Qa4 Re5 21.Ba3+–) 20.Ba3 (20.Qa7?! Qb5 21.Qa3 Qc6+–) 20...Nf6 (20...Qc7 21.Rf4+–) 21.Bf8 Kf8 22.Qa7 Ne4 (22...Qd6 23.Qb6 Kg8+–) 23.Qf7 1–0. bsmh – fogt, internet, 2009.

5.Nf3 Bc5

6.c4 0–0 7.Be2 d5 8.0–0 dc4 9.Bc4 Bd6 10.a4 Ng4 11.g3 (11.h3 Nf6+=) 11...Nf6 12.d4 Nbd7 13.Nbd2 Nh5 (13...c5!?=) 14.Ne5 Ne5 15.de5 (15.Qh5?! Nc4 16.Nc4 Bd5=) 15...Bc5 16.Nf3?? (16.Nb3 Qg5 17.Nc5 bc5+–) 16...Bf3?? (better is 16...Qd1 17.Rfd1 Bf3–+) 17.Qf3+– Qg5 18.Bd4 (18.h4!? Qf5 19.Qf5 ef5+–) 18...Bd4 19.ed4 Rad8 20.Rad1 g6 21.Qc6 Qe7 22.Qb7 Ra8 23.d5 ed5 24.Bd5 Qe5 25.Qa6 Nf6? 26.Ba8+– Ra8 27.Qb7 Rf8 28.Qa7 Ng4 29.a5 Qh5 30.h4 Qf5? 31.ab6 cb6 32.Qb6 g5 33.Qd6 gh4 34.Qf4 Qh5 35.gh4 Qh4 36.Qg3 Qg3+/– 37.fg3 Ne3 38.g4 Nf1 39.Rf1 Kg7 40.b6 Kg6 41.b7 Rb8 42.Rb1 Kg5 43.Kg2 Kg4= 44.Rb4 Kg5 45.Kg3 (45...Kf6 46.Kh4=). stoker – windmill, Live Game Caissa's Web, 2004.

6.Be2 0–0 7.0–0 d5 8.d4 Bd6 9.c4 dc4 10.Bc4 c5 (10...a6 11.a4=) 11.Qb3 (11.dc5 bc5 12.Na3 Bc7+=) 11...cd4 12.Nd4 Bc5 (better is 12...Ng4 13.h3 Qh4=) 13.Ne6 (better is 13.Rd1 Qc7 14.Nd2+=) 13...fe6–/+ 14.Be6 Kh8 15.Nc3 Nbd7 16.Nd5 (16.Rad1 Qe8–/+) 16...Bd5 (16...Qe8 17.Nc7 Qg6 18.Bh3–/+) 17.Bd5 Nd5 18.Qd5 Nf6 19.Qf5 Qd7 (better is 19...Qd2 20.Rab1 Rad8–+) 20.Qg5? (better is 20.Qd7!? Nd7 21.Rfd1–/+) 20...Rad8 (20...Qb5 21.Bf6 Rf6 22.a4–+) 21.Qg3 (21.Bf6 gf6 22.Qh5 Qb5–+) 21...Qd2 (better is 21...Ne4!? 22.Qh4 Rde8–+) 22.Be5 Bd6 23.Bd6 Qd6 (23...Rd6 24.Qh4–+) 24.Qf3 (better is 24.Qd6!? Rd6 25.Rad1–/+) 24...Nd5 25.Rad1?? (better is 25.Qg4–+) 25...Rf3 (25...Rf3 26.gf3 Qg6 27.Kh1 Qf5–+) 0–1. GuestHSPY – GuestFNMB, freechess.org, 2018.

6.Be2 Ne4 7.d3 Nf6 8.0–0 Ng4 (8...a6!?=) 9.Bg7+/– Rg8 10.Bd4 Bd4 11.ed4 (11.Nd4?? Ne3 12.g3 Nd1 13.Rd1 Qf6–+) 11...Qf6 12.Nbd2 Qg6 (12...Nh2!? 13.Kh2 Qh6 14.Kg1 Qh3=) 13.g3 Qf6 (13...Qh5 14.c4+=) 14.h3+/– Qf5? (better is 14...Nh6+/–) 15.hg4+– Rg4 16.Ne4! d5 (16...Be4 17.de4 Combination) 17.Ne5 Rg7 18.Bg4 Rg4 19.Qg4 (19.Ng4 de4 20.de4 Be4+/–) 19...de4 20.Qg8 Ke7 21.de4 Be4 22.Qc8 Qh3 (22...Bf3 23.Qc7 Kf8 24.Rae1+–) 23.Qc7 Kf6 (23...Ke8 24.Qf7 Kd8 25.Qf8 Kc7 26.Qg7 Kc8+–) 24.Qf7 Kg5 25.Qf4 Kh5 26.g4 Kh4 (26...Qg4 27.Qg4 Kh6 28.Nf7) 27.Qf6 1–0. DEFFM – GuestYHHT, freechess.org, 2018.

5.Nf3 c6

6.a4 a6 7.c4 Bb4 8.Nc3 0–0 9.Be2 (9.Bd3 d5 10.Qb3 Bd6=) 9...d5= 10.0–0 a5 (10...dc4 11.Bc4 ab5 12.ab5 Ra1 13.Ba1=) 11.d4 Be7 (11...cb5 12.Nb5 Nbd7 13.cd5 Bd5 14.Nd2+=) 12.Ne5 (12.Rc1 c5+/–) 12...Nfd7 (12...cb5 13.ab5 Bd6 14.Qb3+/–) 13.bc6 Nc6 14.cd5 Nce5 15.de6 (better is 15.de5 Bc5 16.Qd2+/–) 15...Nf3? (better is 15...fe6 16.de5 Ne5+/–) 16.Bf3+– Bf3 17.ef7 (17.gf3?! fe6 18.Rc1 Bb4+/–) 17...Rf7 18.gf3 Bh4 (18...Bb4 19.Ne4+–) 19.f4 Qf6 20.Qg4 h6 (20...Qh6 21.Qg2 Re8 22.Ba3+–) 21.f3 g5 22.Ne4 Qe7 (22...Qg6 23.Rac1 Re8 24.f5 Rf5 25.Nd6+–) 23.d5 Qb4 (23...Nc5 24.Qh5 gf4+–) 24.Bd4 Re8 (24...Qe7 25.d6 Qf8 26.fg5 hg5 27.f4+–) 25.Qh5 Rh7 (25...Re4 26.Qg6 Kf8 27.fe4 gf4 28.Qh6 Ke8 29.Qh4 Qe7 30.Rf4 Qh4 31.Rh4 Kd8+–) 26.Qg6 Kf8 27.Qh7 (27.Qh7 Re4 28.fe4+–) 1–0. DEFFM – teachMeMore, freechess.org, 2018.

6.a4 a6 7.c4 ab5 8.ab5 Ra1 9.Ba1 Bc5 10.Be2 0–0 11.0–0 cb5 12.d4 Be7 13.cb5 d5 (13...Qc7 14.Bd3=) 14.Qc2 Ne4 15.Nbd2 Bb4 16.Ne4 de4 17.Ne5 Bd6 18.Rc1 Bd5 19.Nc4 Bc7 20.Nd2 Bd6 21.Ne4 Be4 (better is 21...Bh2!? 22.Kh2 Qh4 23.Kg1 Be4+/–) 22.Qe4+– Qe7 23.d5 e5 24.Qb1 Nd7 25.Bd3 h6 26.Rc6 Bc5 27.Bh7 Kh8 28.Bf5 Nf6 Black plans e4 (28...Nb8 29.Rc8 Rc8 30.Bc8+–) 29.Qd3 e4 30.Qd1 Nd7?? (30...Ra8+–) 31.Rh6 Kg8 32.Rh8! Kh8 (32...Kh8 33.Qh5 Mate attack) 33.Qh5 Kg8 1–0. DEFFM – GuestPNTS, freechess.org, 2017.

6.a4 Bb4 7.Bd3=.

6.a4 cb5 7.ab5 d5 (7...Be7 8.Nc3=) 8.d4 Ne4 (8...Bb4 9.Bc3 Bd6 10.Bd3=) 9.Nbd2 (9.Bd3 Bb4 10.c3 Ba5+=) 9...Bb4= 10.Bd3 Bd2 (10...Qd6!?=) 11.Nd2+/– Nd6 (11...0–0 12.Ba3 Re8 13.Qh5+=) 12.0–0 (12.Qe2 Qc8+/–) 12...a6 13.ba6 Na6 (13...Ba6 14.Re1+/–) 14.Ba3 Nc7 (14...0–0 15.Qh5 f5 16.Nf3+/–) 15.Qb1 (15.Qg4 0–0+/–) 15...Na6 (15...Nc8 16.Rc1+/–) 16.Bd6 (16.Qb3 Nb8+/–) 16...Qd6 17.Qb5 Ke7 18.Rfb1 Nc7 19.Qb3 (19.Ra8 Ra8 20.Qb6 Qb6 21.Rb6 Ba6+/–) 19...Rhb8 (19...Ba6 20.Ba6 Na6 21.c4+/–) 20.Ra8 (20.Bh7?! Rh8 21.Ra8 Na8=) 20...Ba8 (20...Ra8 21.Qb6 (21.Bh7?! g6=) 21...Qb6 22.Rb6+/–) 21.c4+– (21.Bh7?! g6 22.Nf3 Rh8 23.Bg6 fg6+=) 21...dc4 22.Nc4 (worse is 22.Qc4 b5 23.Qc3 b4+=; 22.Bc4?! Kf8+=) 22...Qd5 (22...Bd5!?+–) 23.Qb4 Kf6 The mate threat is Qxg2 24.e4 Qd4?? (24...Qd8+–) 25.e5 Kg5 26.Qd2 Qf4 (26...Kh5 27.Be2 Qg4+–) 27.h4! (27.Bh7 Qd2 28.Nd2 g6–/+; 27.Rb6?? Qd2 28.Nd2 Rb6–+) 27...Kg4 (27...Kh4 Deflection from f4 28.Qf4 Eliminates the defender f4) 28.f3 Bf3 29.gf3 Kg3 (29...Kh3 30.Qf4 b5 31.Qg4) 30.Qf2 Kh3 31.Bf1 1–0. Greer,V – Ferraco, Arizona USA, 1976.

6.a4 cb5 7.ab5 d6 8.Be2 Be7 9.0–0 Nbd7 (9...0–0 10.Nc3=) 10.h3 0–0 11.Nd4 Ne5 (11...Nc5 12.d3=) 12.f4 Ned7 13.Bf3 d5 14.c4 Nc5 15.d3 h5 (15...Qd7!?=) 16.Nc3+= a5 17.ba6 Ra6 18.Ra6 Ba6 19.Nc6 Qc7 20.Nb4 (worse is 20.cd5 A) worse is 20...Bd3 21.Rf2+= (21.Ne7?! Qe7 22.Re1 Rd8=); B) 20...Nd3 21.Ne7 Qe7+=) 20...Bb7 (20...dc4!? 21.Na6 Na6+=) 21.cd5+/– Rd8 (21...Qd7 22.d4 Na6 23.de6 Qe6 24.Bb7 Nb4 25.Qf3+/–) 22.d4 Na6 23.Nc6 Bc6 24.dc6 Nb4 (24...Nd5 25.Qe2 Nab4 26.Rc1 Nc3 27.Bc3+–) 25.Nb5 (25.Bh5?! Nh5 26.Qh5 Qc6+/–) 25...Qc8 26.c7 (26.Qe2 Nfd5 27.Rc1 Na2+–) 26...Rf8 (better is 26...Rd7!?+–) 27.Ba3 (27.Bh5?! Nbd5 28.Qe2 Nh5 29.Qh5 Qd7+/–) 27...Nbd5 28.Be7 Ne7 29.Qb3 (worse is 29.Bh5 Ned5 30.Qe2 Qd7+/–) 29...Ned5 (29...Nfd5 30.f5 Qd7 31.Bd5 (31.Bh5?! ef5 32.Rb1 Rc8+/–) 31...ed5 32.f6+–) 30.Rc1 Ne8?? (30...Qd7+–) 31.Na7 Nec7 (31...Qc7 32.Rc7 Nec7+–) 32.Nc8 Rc8 33.Bd5 ed5 34.Qb6 1–0. Martinez Sanchis,J – Argente Martinez,S, Provincial Individuales Primera (Canals), 2000.

6.a4 cb5 7.ab5 Be7 8.c4 0–0 9.Be2 a6 10.Nc3 (10.0–0 d5=) 10...ab5 (10...d5 11.d4=) 11.Ra8 Ba8 12.cb5 Bf3 13.Bf3 d5 14.d4 Nbd7 (14...Qc7 15.0–0=) 15.0–0 Qc7 16.Qa1 (16.Qd3 Bd6 17.Rc1 Rc8=) 16...Qb7 (16...Bd6 17.h3=) 17.h3 (17.Qa6 Qb8=) 17...Ra8= 18.Qb1 Bb4 19.Rc1 h6 (19...Qb8 20.Be2=) 20.Qc2 Ra5 (20...Rc8 21.Qa4 Bc3 22.Rc3 Rc3 23.Bc3=) 21.Qb3 (21.Be2 Bd6+=) 21...Bc3 (21...Bd6 22.Be2+=) 22.Rc3 (22.Bc3 Ra8+=) 22...Ra8 (22...Ne4 23.Be4 de4 24.Rc6=) 23.Qc2+= Nf8 24.Rc7 Qb8 25.e4 (25.Qc6 Qd8 26.Qb6 Rb8+=) 25...de4 (25...Ra2 26.e5 Rb2 27.Qb2 Qc7 28.ef6+=) 26.Be4= Ne4 27.Qe4 Ng6 (27...Ra1 28.Ba1 Qc7 29.Qc6=) 28.Qf3 (28.Rb7 Qf4 29.Qc2+=) 28...f6? (better is 28...Ra1! 29.Ba1 Qc7=) 29.Qc6+/– Ra7?? (better is 29...Kh8 30.Rb7 Qf4+/–) 30.Qe6+– Kh7 31.Rc6 (better is 31.Rc8 Qc8 32.Qc8+–) 31...Qd8? (31...Re7 32.Rc8 (32.Rb6? Qf4–+) 32...Re6 33.Rb8 Re1 34.Kh2+/–) 32.d5 (32.Rc8 Re7 33.Rd8 Re6+–) 32...Nf8? (better is 32...Re7 33.Qf5 Rd7 34.Bf6 gf6 35.Rf6 Rg7+/–) 33.Qf5+– Kg8 34.d6 (34.Rc8 Qd7 35.Qe6 Qf7 36.Qb6 Ra4+–) 34...Rd7 (34...Nd7 35.Qf4 Nc5 36.Bd4+–) 35.Ba3 (35.Qd5 Kh8+–) 35...Kh8 (35...Qa8 36.Bc1+–) 36.Qf4 (36.Qc2 Qe8+–) 36...Ne6 (better is 36...Ra7 37.Qe3 Nd7+–) 37.Qg3?? (better is 37.Qe3 Qe8 38.Bb2+–) 37...Nd4+/– 38.Kh2 (better is 38.Qd3 Nc6 39.bc6+–) 38...Nf5?? (38...Nb5!? 39.Qd3 Na7+=) 39.Qg6 (better is 39.Qc3 Nd6 40.Bd6+–) 39...Nd4 (better is 39...Nd6 40.Qc2 Nb5+–) 40.Rc7?? (better is 40.Rc3 Qg8 41.Re3+–) 40...Nb5 (better is 40...Rc7 41.dc7 Qc7 42.Kh1 Qe5–/+) 41.Bb4?? (better is 41.Rd7 Qd7 42.Bb4+=) 41...Nc7–+ 42.dc7 Rc7 0–1. GuestHTNP – GuestYWZW, freechess.org, 2016.

6.a4 cb5 7.ab5 Be7 8.Be2 0–0 9.0–0 d6 10.c4 (10.Nd4 a6+=) 10...Nbd7 (10...a5 11.d3=) 11.d4 (11.d3 Qc7+=) 11...d5 (11...Qc7 12.Nc3+=) 12.cd5+= Bd5 (12...Nd5 13.Nbd2+=) 13.Nbd2 (13.Nc3 Bb7+=) 13...Qc7 14.Rc1 Qb7 15.Bd3 (15.Ne5 Rfc8 (15...Bg2? 16.Nc6+–) 16.Qa4 Bf8+=) 15...Rfc8 (15...Bb4 16.Bc3 Bc3 17.Rc3=) 16.Re1 (16.Qe2 Rc1 17.Rc1 Rc8 18.Rc8 Qc8+/–) 16...Rc1 17.Qc1 Rc8 (17...Ne4!?+=) 18.Qb1 h6 (better is 18...Bf3 19.Nf3 Bd6+/–) 19.e4+– Ne4 20.Be4 (20.Ne4 Nf6+–) 20...Be4 21.Ne4 Nf6 22.Nf6 Bf6 23.Qa1 Qd5 24.Ne5 Be5 25.Re5 Qc4 26.Re1 Qb5 27.Rc1?? Rc1= 28.Qc1 Qd5 29.h3 f6 30.Qe3 a6 31.Qa3 a5 32.Qa4 Kh7 33.Kh2 Qd6 34.g3 Qd5 35.Ba3 b5 36.Qa5+– Qd4 37.Qb5?? Qf2–+ 38.Kh1 Qg3 39.Qb2 Qh3 40.Qh2 Qf3 41.Qg2 Qd1 42.Kh2 Qh5 43.Qh3 Qe5 (44.Kg2 Qe2 45.Kg1 f5–+; better is 43...Qh3!? 44.Kh3 g5 45.Bb2–+) 0–1. abt – Vargas5, Live Game Caissa's Web, 2004.

6.a4 d5 7.Be2 Bd6 8.0–0 0–0 9.c4 c5 10.d4 Nbd7 11.Nc3 Rc8 12.Qb3 (12.cd5 Nd5 13.Rc1 Nc3 14.Bc3 Bd5=) 12...dc4 13.Bc4? (13.Qc4!? Bf3 14.Bf3 cd4 15.Qd4+=) 13...cd4 (better is 13...Bf3!? 14.gf3 cd4 15.ed4–+) 14.Nd4–/+ e5?? (better is 14...Qc7 15.Be2 Bh2 16.Kh1 Nc5–/+) 15.Nf5= Nc5 Black intends e4 16.Qa2 Bb8 17.Rad1 Qe8 Black prepares e4 18.Nd6 Bd6 19.Rd6 e4 20.Rf6 (20.Rfd1 Ng4 21.Be2 Ne5+=) 20...gf6= 21.Bd5 Bd5 22.Nd5 Nd3?? (better is 22...Qe6 23.Nf6 Kg7 24.Qe6 Ne6 25.Nd7 Kg8 26.Nf8 Kf8+/–) 23.Nf6+– (23.Nf6 Kg7 24.Ne8 Kg6 25.Nd6+–) 1–0. iwan19999 (1700) – mariuszkisiel (1680), internet, 2013.

6.Nc3 a6 7.bc6 Nc6=.

6.c4 Bb4 7.Nc3 0–0 8.Be2 cb5 9.cb5 d6 10.0–0 Qd7 11.Ne1 a6 12.a4 d5 13.Bf3 Bc3 14.Bc3 Ne4 15.Be4 de4 16.Nc2 ab5 17.ab5 Qb5 18.Ra8 Ba8 19.Qa1 1–0. valpa – willem199, playchess.de, 2002.

6.c4 d5 7.a4 Nbd7 8.Nc3 (8.cd5 Nd5 9.Nc3 Nc3 10.Bc3 Rc8=) 8...Qc7 (8...Rc8 9.bc6 Bc6 10.cd5 Nd5 11.Nb5+=) 9.Be2 (9.cd5 ed5 10.bc6 Bc6+=) 9...Bb4 (9...dc4 10.Bc4 cb5 11.Bb5=) 10.h3 (10.cd5 cd5 11.0–0 0–0+=) 10...0–0 (10...dc4 11.Rc1+=) 11.0–0 (11.cd5 Nd5 12.Nd5 cd5 13.Rc1=) 11...Nc5 (11...dc4!? 12.Bc4 cb5 13.Bb5 a6+=) 12.Qc2 (12.Na2 Ba5+=) 12...Nfe4 (12...dc4 13.Na2 c3 14.Nc3 cb5 15.Na2+=) 13.Na2 Ba5 14.Ba3 (14.cd5 ed5 15.Be5 Qd7=) 14...Rfc8 (14...dc4 15.Bc4 cb5 16.ab5=) 15.d4 Nd7 16.Bd3 (16.cd5 ed5 17.bc6 Qc6 18.Qc6 Rc6+=) 16...Ndf6 (16...c5 17.Rac1=) 17.Ne5 (17.cd5 ed5 18.bc6 Qc6=) 17...cb5 (17...c5 18.Bb2=) 18.ab5 dc4 (18...Qd8 19.c5 bc5 20.Bc5 Bc7+=) 19.Be2 (better is 19.Nc4 Bd5 20.Rfc1=) 19...Nd2–/+ 20.Rfd1 Be4 21.Qb2?? (better is 21.Qa4 Nb3 22.f3–/+) 21...c3 22.Rac1 (22.Nc3 Bc3 23.Qa2–+) 22...cb2 23.Rc7 Rc7 24.Bb2 Rc2 25.f3 (25.Bc3 Ra2 26.Ba5 ba5–+) 25...Rb2 26.Nc1 (26.fe4 Ra2 27.Bd3 Nfe4–+) 26...Bc2 27.Rd2 (27.Re1 Nd5 28.Ncd3 Rb5–+) 27...Bd2 28.Ncd3 Be3 29.Kh2 Bf4 (better is 29...Rb1 30.f4–+) 30.Nf4 Ba4 31.Nc6 (31.Bc4 Bb5 32.Nfd3 Rb1–+) 31...Bb5 (better is 31...g5 32.Ne6 fe6 33.Bc4 Bb5 34.Be6 Kg7 35.Ne7–+) 32.Bb5 Rb5 33.Nd3 (33.h4 a5 34.g4 h6–+) 33...Rb3 (33...a5 34.Kg3–+) 34.Nde5 a5 35.Ne7 Kf8 36.N5c6 Nd5 37.Nd5 ed5 38.Kg3 g6 (38...a4 39.Kf4 a3 40.Ke5–+) 39.Kf4 Rc8 (better is 39...a4 40.Ke5 a3 41.Kd5–+) 40.Na7 Rc7 (40...Rc7 41.Ke5 Ra7–+) 0–1. Niermann,G – Nordlohne,J, Germany, 1998.

6.c4 d5 7.a4 Nbd7 8.Be2 (8.cd5 Nd5 9.Nc3 Nc3 10.Bc3 a6=) 8...Rc8 (8...dc4 9.Bc4 Bd6 10.d3=) 9.0–0 (9.cd5 Nd5 10.0–0 N5f6=) 9...cb5 (9...dc4 10.Bc4 cb5 11.Bb5+=) 10.cb5 (10.ab5 dc4 11.Ra7 Rc7+=) 10...Bd6 (10...Bb4 11.Ba3 Ba5 12.d4+=) 11.d4 (11.Ba3 Ba3 12.Na3 0–0=) 11...0–0 (11...Ne4 12.Ba3=) 12.Nbd2 (12.Ba3 Ba3 13.Na3 Ne4=) 12...Re8 (12...Ne4 13.Ba3=) 13.Qb3 (13.Ba3 Ba3 14.Ra3 Ne4=) 13...Ne4 14.Rac1 (14.Ba3 Ndf6=) 14...Nd2 (14...Qe7 15.Rfd1=) 15.Nd2 Nf6 (15...Qh4 16.Nf3 Qe7 17.Bd3=) 16.Rc8 (16.Ba3 Re7+=) 16...Qc8 (16...Bc8 17.Ba3+=) 17.Rc1 Qb8 (17...Qd7 18.Ba3+=) 18.h3 (18.Nf3 Bc7+=) 18...Rc8= 19.Rc8 Qc8 20.Qc3 (20.Ba3 Ba3 21.Qa3 Qc2+=) 20...Qc3= 21.Bc3 Ne4 22.Ne4 de4 23.a5 (23.f4 ef3 24.Bf3 Bd5+=) 23...ba5 24.Ba5 Bd5 25.Kf1 Kf8 26.Ke1 Ke8 27.Kd2 Kd7 (27...f6 28.Kc3+=) 28.Kc3 g6 (28...Bh2 29.f4+=) 29.Bb4 Bb4 (29...f6 30.Bc5 Bb8 31.f3+=) 30.Kb4 Kc7 (30...Kd6 31.Ka5 Bb7 32.f4+=) 31.Kc5+/– Bb7 (31...h5 32.Bc4 Bc4 33.Kc4+=) 32.f3 (32.h4 h5+/–) 32...ef3 (32...g5 33.fe4 Be4 34.g3+=) 33.gf3 (33.Bf3!? Bf3 34.gf3+=) 33...f5 34.h4 h6 35.f4 Kd7 36.Bc4 Bc8 (36...Ke7 37.Bd3+=) 37.d5 ed5 38.Bd5 (38.Kd5 Bb7 39.Ke5 Ke7+/–) 38...Ke7+= 39.Bg8 (39.e4 fe4 40.Be4 Kf6+=) 39...Bd7 (39...Bb7 40.Kd4+=) 40.Bd5 (40.Bc4 Be8+=) 40...h5 (40...Bc8 41.Bc6+=) 41.Bb7 (41.Bc4 Be8+=) 41...Ke6 (41...Be6 42.Kb4+=) 42.Bc6 Bc8? (better is 42...Ke7+=) 43.Be8+– Kf6 (43...Bb7+–) 44.Kd6 a5 (44...Be6+–) 45.b6 Ba6 (45...Kg7 46.Kc7 Ba6 47.Bb5 Bb5 48.b7+–) 46.Kc7 Ke7 (46...Kg7 47.Bb5!! Bb5 48.b7+–) 47.Bb5!! (47.Bb5 Bb5 48.b7+–) 1–0. Krafzik,Joachim (1840) – Harke,Horst (1665), 18 sen. Bay. EM2006 Schney op, 2006.

6.c4 d5 7.Be2 Be7 8.0–0 0–0 9.d4 dc4 10.Bc4 cb5 11.Bb5 Nc6 12.Nbd2 a6 13.Ba4 (13.Be2 Rc8=) 13...b5+= 14.Bc2 Nb4 15.Bb1 Rc8 (15...Qc7 16.Qe2+=) 16.a3 (16.a4 ba4 17.Qa4 Bc6=) 16...Nbd5 17.Qb3 Nb6 18.Bd3 (18.e4 Na4+=) 18...Na4–/+ 19.Bc1 Bd5 20.Qd1 (20.Qb1 Nc3 21.Qb2 Rc7–/+) 20...Nc3 (20...Qc7 21.Nb1 Bf3 22.Qf3 Qc1 23.Rc1 Rc1 24.Bf1 Nc3 25.Nc3 Ra1–+) 21.Qe1+= Nfe4 22.Ne4 Be4 23.Be4 Ne4 24.Nd2 (24.Bd2 Re8+=) 24...Nc3 (24...Nf6 25.Nf3+=) 25.Nb1 (25.Bb2 Na4 26.Qb1 Bd6+=) 25...Na4 (25...Nb1 26.Rb1 Rc2 27.Qd1–/+) 26.Bd2–/+ Rc4 (26...Rc2 27.Qd1 Qc7 28.Ba5–/+) 27.Ba5 (27.Nc3 Nc3 28.Bc3 Qd7+=) 27...Qd7 28.Nc3 (28.Nd2 Rc2+=) 28...Nc3–/+ Black fights for the Initiative 29.Bc3 Rfc8 30.Ba5 (30.Bb4 Bd6–/+) 30...Qc6 (30...Bd6 31.Bb4+=) 31.Qb1 (31.Bb4 Bd6+=) 31...Bd6 (31...Bf6 32.Rd1–/+) 32.g3 (32.Bb4 e5–/+) 32...e5 33.de5 (33.Rd1 ed4 34.ed4 Qd5–/+) 33...Be5 34.Ra2 g6 (34...Bf6 35.Rd2–/+) 35.Rd1+= Qf3 (35...h6 36.Rad2+=) 36.Qd3 (36.Rad2 h6+=) 36...Bc3 (36...Rc1!? 37.Rad2 R8c2–/+) 37.Bc3+= Rc3 38.Qd2 Qd1 (38...h6 39.Raa1+=) 39.Qd1 Rc1 40.Qc1 Rc1 41.Kg2 Rc3 (41...f5 42.Kf3+=) 42.Kf3 Kg7 (42...f5 43.g4+=) 43.Ke2 h5 (43...Kf6 44.Kd2 Rc4 45.Rc2+=) 44.h4 Kf6 45.Kd2 Rc6 (45...Rc4 46.f3=) 46.Kd3 (46.Rb2 Ke5=) 46...Ke5+= 47.f3 Rc4 (47...Rc1 48.Rc2 Rc2 49.Kc2+=) 48.Rb2= Kd5 49.e4 Kc5 50.g4 (50.Rb3 a5+=) 50...Ra4 (50...hg4 51.fg4 Ra4 52.Ra2+=) 51.Rc2 (51.Ra2 Kd6 52.gh5 gh5–/+) 51...Kd6–/+ 52.Rc3 (better is 52.gh5 Ra3 53.Ke2 gh5 54.Rd2 Ke5 55.Rd7–/+) 52...Ke5 (better is 52...hg4!? 53.fg4 Ke5–/+) 53.gh5= gh5 54.Ke3 Kf6 (54...Ke6 55.Kf4=) 55.Kf4 (55.Rb3 Ke6=) 55...Kg6 (55...Ra5 56.Re3=) 56.Ke5 a5 (56...Ra5 57.Kd4=) 57.Rb3 b4 58.ab4 ab4 (58...Rb4 59.Ra3 f6 60.Kd5=) 59.Kf4 (59.f4 Kg7+=) 59...Kf6 60.e5 Ke6 61.Ke4 f5 (61...f6 62.ef6 Kf6 63.f4=) 62.ef6 (better is 62.Kf4!? Kd5 63.Kf5+–) 62...Kf6= 63.Kf4 Kg6 64.Ke4 Kf6 65.Ke3? (better is 65.f4=) 65...Ra3–+ 66.Rd3 Kf5 67.Kd2 Rd3 68.Kd3 Kf4 69.Kc4 Kf3 70.Kb4 Kg3 71.Kc3 Kh4 (71...Kh4 72.Kd4 Kg3–+) 0–1. Bartle,Georg – Jahr,D, Templin, 2004.

6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.d3 c5 10.Nbd2 Qc7 11.a4 Ng4 12.h3+= Bf6 13.d4 Nh6 14.Rc1 Rc8 15.cd5 Bd5 16.Bd3 Qd7 17.Ne4 Be7 18.dc5 Bc5 19.Nc5+/– bc5 20.Ba3 Qc7? 21.Rc5+– (21.Rc5 Qd8 22.Bh7 Kh8 23.Rc8 Qc8 24.Bb1+–; 21.Bc5?! Qb7+–) 1–0. Bonetti,Shane – comanchee, ICC, 2002.

6.c4 cb5

7.cb5 a6 8.Nc3=.

7.cb5 d5 8.Nc3 Bd6 9.Be2=.

7.cb5 d5 8.Nc3 Nbd7 9.Be2 (9.Rc1 Bd6=) 9...Bd6 10.Rc1 e5 (10...0–0 11.0–0=) 11.0–0 (11.d4 e4 12.Nh4 g6=) 11...0–0 12.d3 (12.d4 e4 13.Nh4 Qb8=) 12...Re8 (12...a6 13.ba6 Ba6 14.a4+=) 13.Qd2 (13.d4 e4 14.Nh4 Qb8=) 13...Rc8 14.Rc2 Nc5 (14...a6 15.Rfc1=) 15.Rfc1 e4 16.de4 (16.Nd4 Qc7 17.h3 Be5=) 16...Nfe4 (16...de4 17.Nd4=) 17.Ne4 (17.Qd4 Qf6+=) 17...Ne4 (17...de4!? 18.Nd4 Qg5=) 18.Qd4+/– f6 (18...Nf6 19.Qa4 Rc2 20.Rc2+/–) 19.Qd1 (19.Rc8 Bc8 20.Qd5 Kh8+/–) 19...Bc5 (19...Rc2!? 20.Rc2 Qe7+=) 20.Nd4+/– Rc7 21.Bd3 Qd7 22.Nb3 (22.a3+/–) 22...Qd6 (better is 22...Bd6!?+/–) 23.Be4+– Re4 24.Nc5 (24.Bd4!? Rh4 25.h3 Qd7 26.Nc5 bc5 27.Rc5 Rc5 28.Rc5 Re4+–) 24...bc5+/– 25.Ba3 d4 26.Bc5 Qd5 27.f3 Re8? (better is 27...Re3 28.Qd4 Rd3 29.Qd5 Bd5+/–) 28.Qd4+– Qd4 (28...Rec8 29.a4+–) 29.Bd4 Rc2 30.Rc2 Bd5 (30...a6 31.Rc7 Bc8 32.b6+–) 31.Rb2 (better is 31.Ba7!? Be6+–) 31...Re7 32.Kf2 Rb7 (32...Kf7 33.a4+–) 33.a4 Kf7 (33...Bc4 34.e4+–) 34.a5 Bc4 (34...f5 35.a6 Rd7 36.b6 ab6 37.Rb6+–) 35.b6 ab6 36.ab6 Ke6 37.e4 Ba6 (37...Kd6 38.f4+–) 38.Rc2 Rd7 (38...Bb5 39.Ke3+–) 39.Rc6 (39.Ke3 Rb7+–) 39...Rd6 40.Rd6 Kd6 41.Ke3 (41.g4 Kc6+–) 41...Ke6 (41...h5 42.h3+–) 42.f4 (42.g4 Kd6+–) 42...g6 43.g4 f5 44.gf5 gf5 45.e5 (45.ef5 Kf5 46.Be5 Ke6+–) 45...Kd5 46.h4 h5 47.Bc3 (47.Kd2 Bc8+–) 47...Bb7 (47...Kc5 48.Bb2+/–) 48.Ba5 (48.Kf2 Kc5 49.Bd4 Kd5+–) 48...Ba6 (48...Kc5!?+/–) 49.Bb4+– Bb7 (49...Kc6 50.e6 Kb6 51.e7+–) 50.Bd6 Ba6 51.Bc7 Bb7 52.Bd8 (52.Kd3 Bc8+–) 52...Ba6 53.Kd2 Bb7 54.Kc3 Ba6 55.Kb4 Bb7 56.Kb5 Ke6 57.Kc5 Be4 58.b7?? (better is 58.Bc7+–) 58...Bb7+/– 59.Kb6 Bd5 60.Kc7 Bf3 61.Bf6 Bg4 62.Kd8 Bd1 ½–½. Skaug,Thorbjorn – Hagen,Hans Christian, Klubbmesterskap Norway, 2002.

7.cb5 d5 8.Be2 Bd6 9.0–0 0–0 10.d4 Nbd7 11.Nbd2 Rc8 12.Ne5 Qe7 13.a4 Be5 14.de5+= Ne4 15.Ne4 de4 16.Qb1 Rfd8 17.Ba3?? Nc5 18.f4 ef3–/+ 19.Bf3 Bf3 20.Rf3 Rd2 21.Qc1 Rcd8 22.Qf1 Rf8 23.Bb4 Rd5 24.h3 Qd7 25.a5 Ne4?? 26.Bf8+– Kf8 27.ab6 ab6 28.Ra8 Ke7 29.Rf7# 1–0. bloodymama – old1, Live Game Caissa's Web, 2005.

7.cb5 d5 8.Be2 Bd6 9.0–0 0–0 10.Be5=.

7.cb5 d5 8.Be2 Bd6 9.0–0 Nbd7 10.d4 Rc8 (10...Qe7 11.Qb3=) 11.Nbd2 (11.Ba3 Ba3 12.Na3 Ne4+=) 11...Qe7 (11...Ne4 12.Rc1=) 12.Qa4 White gets the initiative 12...0–0 13.Rfc1 Ra8 14.Rc2 (14.Ne5=) 14...e5 (14...a6!?=) 15.de5+/– Ne5 16.Rac1 Nfd7 (16...Rfc8 17.Be5 Be5 18.Ne5 Qe5 19.Nf3 Rc2 20.Qc2+= (worse is 20.Ne5 Rc1 21.Bf1 Ne4+=; worse is 20.Rc2 Qa1 21.Bf1 Ne4+=)) 17.Ne5 Ne5 18.Nf3 d4 (18...Rfd8!?+/–) 19.Qd4+– (19.Bd4?! Nf3 20.Bf3 Bf3 21.gf3 Qg5 22.Kf1 Rfd8=) 19...Bf3 (19...f6 20.Ne5 fe5 21.Qg4+/–) 20.Bf3 (20.gf3 f6+–) 20...Rad8 (20...Nf3 21.gf3 f6 22.Qd5 Kh8 23.f4+/–) 21.Qe4 (21.Bc6 f6+–) 21...Qg5 (21...Nd3 22.Qe7 Be7 23.Rb1 Nb2 24.Rbb2+/–) 22.Be2+– Ng6 (22...Rfe8 23.Qa4 Qe7 24.Qa6+–) 23.Qg4 Qe7 24.g3 (24.Qh5 Ne5+–) 24...Be5+/– 25.Be5 (25.Qe4 Bb2 26.Qe7 Ne7 27.Rb2 Rd7+–) 25...Ne5 26.Qe4 f5 27.Qa4 Qb7 (27...Rd7!?+–) 28.Rc7 Qd5 (28...Qb8 29.Qf4 Rd5 30.e4 fe4 31.Qe4+–) 29.Bc4 (29.Qa7!? Kh8+–) 29...Nc4 30.Qc4 (30.Qa7 Rf7 31.Rf7 Qf7 32.Qf7 Kf7 33.Rc4 Ra8+–) 30...Qc4 (30...Rf7 31.Qd5 Rd5 32.Rf7 Kf7 33.Rc7 Kf8 34.a4+– (34.Ra7?! Rb5 35.a4 Rb2+/–)) 31.R1c4 Ra8 32.Rd7 (32.a4 Rf7+–) 32...Rf7 33.Rcc7 (33.Rd6 a6+–) 33...Rd7+/– 34.Rd7 a6 35.a4 (35.Rd5 g6+/–) 35...ab5 36.ab5 Ra5 37.Rd5 g6 38.h4 Kf7 39.f4 Ke7 (39...Ke6 40.Re5 Kf6 41.Kf2+=) 40.Kf2 Ra3 (40...h5 41.e4 fe4 42.f5 gf5 43.Rf5+/–) 41.h5 Rc3 (41...Ke6 42.Re5 Kf6 43.g4+/–) 42.hg6 (42.g4 fg4 43.hg6 hg6 44.Re5 Kd7+–) 42...hg6 43.Re5 Kd7 (43...Kf6 44.g4+/–) 44.g4 (better is 44.Kf3+–) 44...Rc5?? (better is 44...fg4 45.Rg5 Rb3+/–) 45.Rc5+– bc5 46.gf5 gf5 47.e4 c4 (47...fe4 48.Ke3 c4 49.Ke4 c3+–) 48.ef5 Kd6 49.Ke3 Kc5 50.Kd2 Kb5 51.f6 (51.f6 Kb4 52.f7+–) 1–0. Frank,Volkmar – Landt,Stefan (1625), Germany, 2005.

7.cb5 d5 8.Be2 Nbd7 9.0–0 Bd6 10.Nc3 Rc8 11.Rc1 Rc7 12.Qa4 0–0 13.d4 (< 13.Qa7 d4 14.Nd4 e5=+) 13...e5 14.de5 Ne5 15.Ne5 Be5 16.f4 (16.Qa7 Bh2 17.Kh1 d4 18.Kh2 Qd6 19.Kg1 Ra8 20.Qa8 Ba8=) 16...Bc3 17.Rc3 Ne4 18.Rc7 Qc7 19.Rc1 Qd6 (19...Qb8 20.Be5 Qa8 21.Qd4=) 20.Ba3+/– (< 20.Qa7 Qb4 21.Qa3 Qa3 22.Ba3 Ra8+=) 20...Nc5 21.Bc5 bc5 22.Qa7 Ba8? (better is 22...Qe6 23.Qc5 Rc8+/–) 23.Qc5+– (23.Rc5?! d4+–) 23...Qf6 24.a4 Qb2 25.Bf3 Re8 26.a5 h5 27.b6 d4 28.e4 Be4 29.Re1 f5 30.Be4 fe4 31.Qd5 Kh8 32.Qh5 (32...Kg8 33.Qe8 Kh7 34.Qe4 Kh6 35.f5 Qf2 36.Kf2 Kg5 37.Qe7 Kf5 38.Re5 Kg6 39.Qe6 Kh7 40.Rh5) 1–0. Bonetti,Shane – catdoc, ICC, 2002.

5.Nf3 d6

6.a4 Be7 7.Be2 Nbd7 8.d4 e5 (8...a6!?=) 9.de5+/– de5 10.0–0 (10.Ne5 Ne5 11.Qd8 Rd8 12.Be5 Rg8+/–) 10...Bf3 11.Bf3 e4 12.Be2 Nc5 13.Na3 (13.a5!?+=) 13...Na4= 14.Bd4 Nc5 15.Nc4 Ne6 16.Ne5 Nd4 17.ed4 0–0 18.Nc6 Qd7 19.c4 (19.Ra6 Nd5=) 19...Ne8 (19...a5 20.f3 Bd6 21.fe4 Ne4 22.Bf3+=) 20.d5 (20.Na7 Nf6+=) 20...Bc5 21.Ra7 Ra7 22.Na7 Nd6 23.Qc2 f5 24.Nc6 g6 25.Qc3 Ra8 26.Qf6 (better is 26.Ra1 Re8 27.Ra7+=) 26...Qf7?? (better is 26...Qg7 27.Qg7 Kg7+=) 27.Ne7+– Kf8 28.Qh8 (28.Qh8 Ke7 29.Qa8+–) 1–0. GuestHJQM – guestwupssss, freechess.org, 2017.

6.c4 d5 7.cd5 Bd5 8.Nc3 Bb7 9.Bc4 Be7 10.0–0 0–0 11.d3 Nbd7 12.Ne2 Bf3 13.gf3 Nh5 14.Nd4 Bd6 15.f4 Qh4 16.Qf3 Ndf6 17.h3 Nf4 18.ef4 Bf4 19.Nc6 e5 20.Ne5 Qg5 21.Qg2 Qf5 22.Nf7 (22.Nf7 Qg6 23.Ne5 Kh8 24.Ng6 hg6 25.Qg6+–) 1–0. marekt – TheSimple, internet, 2005.

6.c4 Nfd7 7.d4 Be7 (7...Nf6 A) 8.Be2 a6 (8...Be7 9.Nc3 0–0 10.0–0 c6 11.Bd3 Qc7+=; 8...d5 9.cd5 Nd5 10.0–0 Bd6 11.Nc3 a6+=) 9.a4 d5 10.0–0 ab5 11.cb5 Bd6+=; B) 8.Nc3 a6 (8...Be7 9.Bd3 a6 10.a4 0–0 11.0–0 c6+=; 8...d5 9.cd5 Nd5 10.Bd3 Nc3 11.Bc3 a6+=) 9.Bd3 ab5 10.cb5 Be7 11.0–0 0–0+=; C) 8.Qc2+= a6 (8...c5 9.dc5 bc5 10.Bd3 Be7 11.0–0 Nbd7+=; 8...Be7 9.Bd3 a6 10.a4 c5 11.dc5 ab5+=) 9.a4 ab5 10.ab5 Ra1 11.Ba1 Nbd7+=; D) 8.Bd3 a6 (8...d5 9.cd5 Nd5 10.0–0 Bd6 11.Nc3 Nc3+=) 9.0–0 ab5 10.cb5 Be7 11.a4 0–0+=; 7...a6 8.Bd3 ab5 (8...Be7 9.a4 Nf6 10.0–0 0–0 11.Nc3 Re8+=; 8...Nf6 9.0–0 ab5 10.cb5 Be7 11.a4 0–0+=) 9.cb5 c5 10.0–0 cd4 11.ed4 Be7+=) 8.Be2 (8.Nc3 a6 (8...0–0+= 9.Bd3 a6 10.a4 f5 11.0–0 c6+/–; 8...Nf6 9.Bd3 a6 10.a4 0–0 11.0–0 Nbd7+=) 9.a4 Nf6 10.Bd3 0–0 11.0–0 Nbd7+=; 8.Bd3 Nf6 (8...0–0 9.0–0 Nf6 10.Nc3 c6 11.Qc2 a6+=; 8...a6 9.a4 Nf6 10.0–0 Nbd7 11.Nc3 0–0+=) 9.0–0 0–0 10.Nc3 c5 11.d5 h6+=; 8.a4 Nf6 (8...f5 9.Bd3 0–0 10.0–0 a6 11.Nc3 c6+/–; 8...0–0 9.Bd3 f5 10.0–0 Qe8 11.Nbd2 c5+=) 9.Bd3 0–0 10.Nc3 c5 11.d5 h6+=) 8...a6+= (8...0–0 9.0–0 a6 10.a4 f5 11.Nc3 Qe8+=; 8...Nf6 9.0–0 a6 10.a4 0–0 11.Nc3 c6+=) 9.a4 (9.Nc3 ab5 10.cb5 0–0+= 11.0–0 Nf6+=; 9.0–0 0–0 10.a4 Nf6 11.Nc3 c5+=) 9...ab5 (9...f5 10.Nc3 0–0 11.0–0 Qe8+=) 10.ab5 Ra1 11.Ba1 0–0 12.0–0 c5 13.Nbd2 (13.bc6 Nc6 14.Nc3 Nf6+=) 13...cd4 14.Nd4 (14.ed4 Nf6=) 14...Bf6 (14...Qc7 15.Bf3=) 15.N2f3 (15.N4b3 Qc7+=) 15...Qe7 (15...Qc7 16.Nb3=) 16.Re1 (16.Nd2 Nc5=) 16...Rc8 (16...Nc5 17.Bc3+=) 17.Bb2 (17.Bc3 Nc5=) 17...d5 (17...Nc5!?+=) 18.cd5= Bd5 19.Qa1 (19.Bd3 Bb7=) 19...Qb4 (19...Nc5 20.Qa3+=) 20.Rb1 (20.Rc1 Qf8 21.h3=) 20...Bf3 (20...e5!? 21.Ba3 Qc3=) 21.Nf3 (21.Bf3 g6+/–) 21...Bb2+= 22.Rb2 Qc5 (22...Qd6 23.Rd2 Qc7 24.Ra2+=) 23.Rb3 (23.Rd2 Qc7+=) 23...Qc1 (23...Nf6 24.g3=) 24.Qc1 Rc1 25.Bf1 Nc5 (25...Ra1 26.Rc3 Nc5 27.Ne5=) 26.Rb4 (26.Ra3!? Rd1 27.g3+=) 26...Nbd7= 27.Rc4 Rd1 (27...Ra1 28.Rd4=) 28.Rc2 (28.Rd4 Rd4 29.Nd4 g6=) 28...Nf8 (28...e5 29.Rd2 Rd2 30.Nd2=) 29.Rd2 (29.g4 Nfd7=) 29...Rc1 (29...Rd2 30.Nd2 Nfd7 31.Nc4=) 30.Re2 (30.Rd6 Ncd7+=) 30...Nd3 (30...Nfd7 31.Ra2=) 31.Rd2 Nc5 32.Re2 (32.Rd6 Ncd7+=) 32...Nd3 (32...g6 33.Ra2=) 33.Nd4 (33.Ra2 g6=) 33...Rd1 (33...g5 34.Rd2 Ne5 35.g3=) 34.Nc6 (34.Ra2 Nc1 35.Rc2 g6+=) 34...f6 (34...g5 35.Ra2=) 35.Ne7 (35.g3 Nd7=) 35...Kf7 36.Nc8 Nd7 (36...Nc1 37.Rb2 Nd7 38.g3=) 37.Rc2 N3e5 (37...Kf8 38.h3=) 38.f3 Nd3 (38...Ke8 39.Kf2 Kd8 40.Be2=) 39.Rc6 Attacking the isolated pawn on b6 (39.Rc7 Ke8 40.Rc6 N7e5+/–) 39...N3e5 (better is 39...Nb4=) 40.Rd6 (better is 40.Kf2!?+=) 40...Rc1–/+ 41.Nb6 (better is 41.f4 Rc8 42.fe5–/+) 41...Nb6?? (better is 41...Ke7 42.Nd7 Kd6 43.Ne5 Ke5–+) 42.Rb6+/– g5 (42...f5 43.h3+/–) 43.Ra6 (43.Rb7 Kg6+–) 43...g4 (43...Ke7 44.Ra7 Kd6 45.h3+/–) 44.f4 (44.Ra7 Ke8 45.Kf2 gf3 46.gf3 Nd7+–) 44...Nd7 45.b6 (better is 45.Rc6 Rb1 46.Kf2+–) 45...Nb8?? (better is 45...Ke7+=) 46.Ra7+– Kg6 47.Rb7 (better is 47.Rc7 Rb1 48.b7+–) 47...Nc6?? (better is 47...Na6 48.f5! Kf5 49.Rh7 Ke4+–) 48.Rc7 e5 (48...h5 49.Kf2 Rc3 50.b7+–) 49.b7 (better is 49.fe5 fe5 50.b7 Kf5 51.Rc6 Rb1+–) 49...g3 (49...Rb1 50.Rc6 ef4 51.ef4 Rb7 52.Bd3 Kg7 53.Rc5+–) 50.h3 (better is 50.Rc6 Rb1 51.Rc7+–) 50...ef4 51.ef4 Rb1 52.Rc6 Rb7 53.Bd3 Kg7 54.Kf1 Rd7 (54...Rb4 55.Rc7 Kf8 56.Rc4+–) 55.Ke2 h6 (55...h5 56.Rc3+–) 56.Rc3 h5 (56...Kf7 57.Kf3+–) 57.Kf3 Kh6 (57...Kf8 58.Kg3 Rg7 59.Kf3+–) 58.Be4 h4 (58...Kg7 59.Rc5+–) 59.Rc6 (59.Rc4 Kg7+–) 59...Kg7 60.Rb6 (60.Kg4 Rd1+–) 60...Rd2 (60...Rd4 61.Rb7 Kg8 62.Bh7 Kf8 63.Kg4+–) 61.Rb7 Kf8 (61...Kg8 62.Kg4 Rd4 63.Kf5+–) 62.Rh7 Rf2 63.Ke3 (63.Kg4 Rb2+–) 63...Rf1 (63...Ra2 64.f5+–) 64.Rh4 Ke7 (64...Re1 65.Kf3+–) 65.Rh7 Ke6 (65...Ke8 66.h4+–) 66.Rc7 (66.f5 Kd6+–) 66...f5 (66...Re1 67.Kf3+–) 67.Bf3 Re1 68.Kd2 (68.Kd4 Kf6+–) 68...Rf1 (68...Rb1 69.h4+–) 69.Rc3 (69.h4 Rb1+–) 69...Rh1 (69...Ra1 70.h4+–) 70.Rc6 Ke7 71.Rh6 (71.Rc1 Rc1 72.Kc1 Kd6+–) 71...Kd8 (71...Kf7 72.Ra6+–) 72.h4 Ke8 73.h5 Rh4 (73...Ke7 74.Ke3+–) 74.Ke3 Kd8 (74...Ke7 75.Rg6+–) 75.Rg6 (75.Rf6 Ke7 76.Rf5 Rh1+–) 75...Ke8 (75...Ke7 76.Rg3 Rh1 77.Rg7 Kf8 78.Rg5+–) 76.h6 (better is 76.Rg5 Ke7+–) 76...Kd8 (76...Kf7 77.Rd6 Kg8+–) 77.Rf6 Ke8 78.Rf5 (78.Kd4 Ke7 79.Ke5 Kd7 80.Kf5 Rh2+–) 78...Rh6 79.Rg5 Re6 (79...Kf7 80.Rg3 Rh1 81.Be4+–) 80.Kd2 (80.Re5 Re5 81.fe5 Ke7 82.Kd4 Ke6 83.Bg4 Ke7 84.e6 Kd6 85.Ke4 Ke7 86.Ke5 Kf8 87.Kd6 Kg8 88.Bf3 Kf8 89.e7 Kf7 90.Be4 Kf6 91.e8Q Kg5 92.Qe5 Kg4 93.Qf6 Kh5 94.Bf3) 80...Rf6 (80...Ke7 81.Rg3 Kf6 82.Rg8+–) 81.Rg3 (81.f5 Ke7+–) 81...Kf8 (81...Rf4 82.Ke3 Rh4 83.Rg7+–) 82.Rg4 (82.Ke3 Rb6+–) 82...Rb6 (82...Ke7 83.Ke3+–) 83.Ke2 (83.Ke3 Ra6+–) 83...Rb2 (83...Ke7 84.Be4+–) 84.Kf1 (84.Ke3 Rb5+–) 84...Rb1 (84...Ke7 85.Rg5+–) 85.Kf2 Rb2 (85...Kf7 86.Be4 Rd1 87.Ke3+–) 86.Kg3 Rb1 (86...Rb5 87.Rg5 Rb4+–) 87.Kh3 (better is 87.f5+–) 87...Rh1= 88.Kg3 Rf1?? (88...Rb1 89.f5 Rb2+–) 89.Rh4 (89.f5 Rb1+–) 89...Ke7 90.Kh2 (90.f5 Ra1+–) 90...Kd6 (90...Kf6 91.Rh5+–) 91.f5 (better is 91.Rh6!? Kd7+–) 91...Ke5 92.Rh5 Kf6 (92...Rb1 93.Kg3 Rb4 94.Kf2+–) 93.Kh3 (better is 93.Kg3 Re1+–) 93...Ke5 (93...Rb1 94.g4 Ke5 95.Kg3+–) 94.Kg3 (94.Kg4 Rb1 95.Rh6 Rb8+–) 94...Rc1 (94...Ra1 95.Kg4 Ra7 96.Rh6 Rg7 97.Rg6+–) 95.Kg4 Rc4 (95...Rc7+–) 96.Kg5 Rf4 97.Kg6 Kd6 98.Kg5 (better is 98.Rh8 Ra4 99.Ra8 Rc4+–) 98...Ke5 99.Kg6 Kd6 100.Rh3 (100.Rh8 Rb4+–) 100...Ke5 101.Rg3 (101.Rh8 Rc4+–) 101...Rf5 102.Rg5 Rg5 103.Kg5 Kd6 1–0. Bonetti,Shane – MacChess 5.0, 2000.

6.c4 e5 7.Be2 Nbd7 (7...a6 8.0–0=) 8.d4 (8.0–0 a6=) 8...ed4 (8...e4 9.Nfd2+=) 9.ed4+= Bf3? (better is 9...d5!?+=) 10.Bf3+/– (worse is 10.gf3 a6+=) 10...Rb8 (10...Rc8 11.Nc3+–) 11.Nc3 (11.0–0 Be7 12.Nc3 0–0+–) 11...Be7 12.0–0 0–0 13.Re1 (13.Qa4 Re8+–) 13...Re8 14.Qa4 a5 (14...Nf8 15.Bc6 N8d7 16.Qa7+–) 15.ba6 1–0. DEFFM – GuestDRWD, freechess.org, 2018.

6.c4 Be7 7.Nc3 a6 8.a4 0–0 9.Be2 Nbd7 10.0–0 d5 11.d4 dc4 (11...ab5 12.cb5 Bd6 13.Ba3=) 12.Bc4 c6 (12...ab5 13.ab5 Ra1 14.Ba1=) 13.Qe2 cb5 (13...ab5 14.ab5 Qc7 15.e4=) 14.ab5+= a5 (14...ab5 15.Bb5 Bb4 16.Rfc1=) 15.Nd2 (15.Rfc1 Rc8+=) 15...Rc8 (15...Qc7 16.Rfc1+=) 16.g3 (16.e4 Qc7+=) 16...Re8 (16...Bb4 17.Rfc1=) 17.Rfc1 Nf8 (17...Bb4 18.e4=) 18.Bd3 Nd5 (18...Ng6 19.Nc4=) 19.Nd5 Bd5 (19...Qd5 20.e4 Qg5 21.f4=) 20.Be4 (20.Rc8 Qc8 21.e4 Bb7+=) 20...Ng6 (20...Qd7 21.Rc8 Rc8 22.Bd3=) 21.Bd3 (21.Bg6 Rc1 22.Rc1 hg6=) 21...Bb4 (21...Rc1 22.Rc1 f5 23.f3=) 22.Nc4 (22.Rc8 Qc8 23.e4 Bb7=) 22...Ne7 (22...Re7 23.e4 Bc4 24.Rc4=) 23.Ba3 (23.Ne5 Rc1 24.Rc1 Rf8+=) 23...Bc4= 24.Rc4 Ba3 25.Ra3 Qd6 (25...Rc4 26.Bc4 Nd5 27.Ra1=) 26.Rac3+= Rc4 27.Rc4 g6 (27...e5 28.Qh5 Ng6 29.Qf3+=) 28.Be4 f5 (28...Rd8 29.Qb2+=) 29.Bc6 (29.Bb7 Kg7+=) 29...Rb8 (29...Rc8 30.Bf3+=) 30.Qc2 Kf7 (30...Rc8 31.h3+=) 31.f3 (31.Qa4 Kg8+/–) 31...h6 (31...Rc8 32.Qc3=) 32.Kg2 (32.Qc3 Rc8+=) 32...g5 (32...Rc8 33.Qa4+=) 33.e4 Kg7 34.Qc3 Kg6 (34...Rf8 35.d5 e5 36.Kg1+=) 35.ef5 (35.h3 Rc8+/–) 35...ef5+= 36.g4 (36.Qe3 Rd8+=) 36...fg4 37.fg4 Rf8 (37...Nd5 38.Qf3 Nf4 39.Kg1=) 38.Be4 (38.d5 Kh7=) 38...Kf7 (38...Kg7 39.Rc7=) 39.Rc7 Qf6 (39...Ke8 40.Bc6 Nc6 41.Rc6=) 40.Qc4 (40.Bd5 Ke8 41.Bf3 Ng6 42.Qc6 Qc6 43.Bc6 Kd8 44.Rd7 Kc8=) 40...Kg7= Threatening mate... how? 41.Bf5 (41.Kh1 Rf7 42.Bg2 Qf4=) 41...Kh8 (41...Rf7 42.Qe6 Nf5 43.Qf6 Kf6 44.Rc6 Kg7 45.gf5+=) 42.Qe2 (better is 42.Qe6!? Qe6 43.Be6=) 42...Nf5–/+ 43.gf5 Qf5 (43...Qd4?! 44.Qe6 Qd2 45.Kg1 Qd1 46.Kf2 Qd2 47.Kg1 Qd1 48.Kf2 Qd2 49.Kg1=) 44.Qe5 Qe5 45.de5 ½–½. Sudhop,Horst (1745) – Noori,Mir Ahmat (1620), 12 sen. LSEM Ruhrgebiet op, 2005.

6.d4 Nbd7 7.Be2 (7.Bd3 a6=) 7...Be7 8.0–0 0–0 9.c4 c6 (9...a6 10.Nc3=) 10.a4 (10.Nc3 cb5 11.cb5 a6=) 10...Rc8 (10...a6 11.Nc3=) 11.Nbd2 (11.Nc3 a6=) 11...Ne8 (11...d5 12.Rc1=) 12.Nb3 (12.Bd3 Qc7+=) 12...Bf6 (12...Nef6 13.Bd3=) 13.Qd2 (13.Bd3 Be7+=) 13...a5 (13...c5 14.Rfc1=) 14.Rac1 (14.ba6 Ba6 15.a5 c5+=) 14...g6 (14...c5 15.Qc2=) 15.Rfd1 (15.Qd3 Bg7+=) 15...c5 16.dc5 (16.Qd3 d5 17.cd5 ed5+=) 16...Bb2 17.Qb2 Nc5 18.Nc5 Rc5 ½–½. Labahn,Wolfgang – Deutschmann,H, Verbandsklasse, 1982.

6.d4 Nbd7 7.Be2 g6 8.c4 Bg7 9.Nbd2 0–0 10.0–0 Ne8 11.a4 (11.Qc2+=) 11...f5 (11...a5 12.Ne1=) 12.Ne1 (12.a5 Rb8+/–) 12...e5 (12...Nef6 13.Nd3+=) 13.Qb3 (13.a5 c5+=) 13...Kh8 (13...Rf7 14.a5+=) 14.g3 (14.a5 ba5 15.Ra5 ed4 16.ed4 Nef6+/–) 14...Nef6 Black intends e4 (14...Qe7 15.Bd1=) 15.Bf3 (15.a5 ba5 16.Ra5 ed4 17.Bd4 Qe7+=) 15...e4= 16.Be2 (16.Bg2 a5=) 16...Qe8 (16...a5 17.Ng2=) 17.a5+= Rb8 (17...ba5 18.Ng2+=) 18.ab6 ab6 19.Ng2 (19.Nc2 Ra8+/–) 19...g5 (19...Ra8+=) 20.f3 (20.Ra7!?+/–) 20...ef3= 21.Bf3 Ne4 (21...Bf3 22.Rf3 Ne4 23.Qc2=) 22.Ne4+= Be4 23.Be4 Qe4 24.Rad1 (24.Ra7!? Rfc8 25.h4+=) 24...Nf6+= 25.Qd3 (25.Ra1 d5+=) 25...Qd3= 26.Rd3 Ne4 27.Ra1 d5 28.cd5 Rfd8 29.Ra7 Rbc8 30.Rb3 (30.d6 Rd6 31.Rd1 Bf6+=) 30...Rd5 31.Ba3 h6 (31...Kg8 32.Ra4+=) 32.Ne1 (32.Ra4 Bf8–/+) 32...f4 (32...Nd2 33.Rc3+=) 33.gf4= gf4 34.Nf3 (34.ef4? Bd4 35.Kg2 Rg8 36.Rg3 Ng3 37.hg3 Rb5 38.Rc7 Rb3–+) 34...fe3 35.Re3 Ng5 (35...Bd4? 36.Nd4 Rg8 37.Kf1 Nd2 38.Kf2+–) 36.Kg2 (36.Ne5 Be5 37.de5 Ne6+=) 36...Rb5 (36...Nf3 37.Rf3 Bd4 38.Rd3 Rg5 39.Kf3–/+) 37.Ne5 Rg8 38.Kf2 (38.Rc7?? Be5 39.Re7 Bf6–+) 38...c5 (38...Be5 39.Re5 Re5 40.de5+=) 39.d5 (39.dc5 bc5 40.Ke2 Kh7=) 39...c4 (39...Rd8 40.Ng6 Kh7 41.Ne7=) 40.Ng6 Kh7 41.Nf8 Kh8 42.Ng6 Kh7 43.Nf8 Kh8 44.Ng6 Kh7 45.Nf8 ½–½. Petrochenko,Maria (2035) – Venkatesh,M R (2440), M. Chigor Memorial, 2016.

6.d4 h6 7.Bd3 Nbd7 (7...a6 8.a4=) 8.0–0+= a5 (8...a6 9.a4+=) 9.a4 (9.c4 Be7+=) 9...g6 (9...Be7 10.c4+=) 10.Nbd2 Bg7 11.e4 Qe7 12.e5 (12.Qe2 0–0–0+=) 12...Nd5 13.Be4 (13.Ba3 0–0–0+=) 13...de5= 14.c4 (better is 14.de5 0–0–0 15.Qe2=) 14...Rb8?? (14...f5 15.Bd5 ed5 16.de5 A) 16...Ne5? 17.Ne5 d4 18.Ndf3 (18.Ng6?! Qg5 19.Re1 Kd8+–) 18...Be5 19.Ne5+–; B) 16...0–0–0=) 15.cd5+– ed5 16.Ba3 Qe6 17.Bb1 (17.Bc2 e4+–) 17...e4+/– 18.Re1 g5 (18...Kd8 19.Bb2+/–) 19.Ba2+– Kd8?? (better is 19...Qg6+–) 20.Ne4! de4 1–0. GuestLBLC – GuestQFVS, freechess.org, 2018.

6.Be2 Be7 7.0–0 Nbd7 8.d4 0–0 9.c4 Re8 10.Nbd2 Bf8 11.Qb3 e5 12.de5 de5 13.Rfd1 Qc8 14.Rac1 Nc5 15.Qc2 e4 16.Nd4 a6 17.a4 ab5 18.ab5 Ra2 19.N4b3 Na4=+ 20.Rb1 Ba3 21.Nc1 Rb2 22.Qa4 Rb1 23.Nb1 Bf8 24.Nc3 h5 25.Nb3 Ng4 26.Nd5 Ne5 27.Bh5 Bd5 28.Rd5+/– Qf5 29.Be2 Qg6 30.Nd2 f5 31.Qc2 Bd6 32.h3 Re6 33.Kf1 Nd7 34.Nb3 Qf7 35.Rd2 Nc5 36.Nd4 Re8 37.Nb3 f4 38.ef4+= Qf4 39.g3 Qf6 40.Rd5?? Bg3 41.Bg4?? Nb3–+ 42.Rf5 Qa1 43.Kg2 Nd4 (43...Nd4 44.Qd2 e3 (< 44...Nf5 45.Bf5 Qe5 46.Be4 Qe4 47.Kg3–+) 45.fe3 Nf5 46.Bf5 Qe5–+) 0–1. bcholy – kingscrusher, ChessWorld.net, 2005.

6.Be2 Be7 7.0–0 Nbd7 8.d4 c5 9.bc6 Bc6 10.c4 d5 11.cd5 Bd5 12.Nc3 Bb7 13.Rc1 a6 14.Qb3 0–0 15.a4 Rc8 16.Nd2 Rb8 (16...Rc7 17.e4=) 17.Ba3 Re8 18.Be7 Qe7 19.Bf3 Rec8?? (19...e5 20.Bb7 Rb7 21.Qc4 ed4 22.ed4=) 20.h3?? (better is 20.Bb7 Rb7 21.Nd5 Nd5 22.Rc8 Nf8 23.Rfc1+–) 20...Bf3= 21.Nf3 Ne8 22.Na2 Rc1 23.Rc1 Qd6 24.Nb4 Ra8 25.Rc6 Qb8 26.Ng5 a5 (26...Qd8 27.Ne4+=) 27.Nd3 (27.Re6 Qd8 28.Nf7 Kf7 29.Nc6+–) 27...Qa7?? (better is 27...Qd8 28.h4 Qe7+=) 28.Re6+– Nef6 (28...Ndf6 29.Rb6 Qe7+–) 29.Re7 Rf8 30.Nf7 (30.Rf7 Nc5 31.Rf8 Kf8 32.dc5 bc5+–) 30...Nc5 31.Nh6 (worse is 31.Ra7 Nb3 32.Ng5 Re8+–; 31.dc5?! Qe7 32.Nd6 Kh8 33.Qb6 Ne8+–) 31...Kh8 32.Ra7 (better is 32.Qf7! Rf7 33.Nf7 Kg8 34.Ra7 Nd3+–) 32...Nb3 33.Nf5 g6 34.Nd6 Nd5 (34...Nd2 35.Rb7 Nfe4 36.Ne4 Ne4 37.Rb6+–) 35.Ne5 Rb8 (35...Nf6 36.Rb7 Nc1 37.Rb6 Ne2 38.Kh2+–) 36.h4 (better is 36.Nd7 Rg8 37.e4 Ne7+–) 36...Nc3 (36...Nf6+–) 37.Nef7 (better is 37.Nd7 Kg7 38.Nb8 Kf6 39.Ne8 Ke6 40.Rh7 Na4+–) 37...Kg7 38.Ng5 Kf6 (38...Kg8 39.Ndf7 Ne2 40.Kh2 Rb7 41.Rb7 Nc5 42.dc5 Nf4 43.Nh6 Kf8 44.Nh7 Ke8 45.Nf6 Kd8 46.Nf7 Kc8 47.Nd6 Kd8 48.Rd7) 39.Rf7 1–0. Efimov,Andrey (2155) – Kudrin,Vladimir (1900), 45th Rtng Kimry, 2009.

6.Be2 Be7 7.c4 a6 8.a4 (8.0–0 c6=) 8...ab5 (8...0–0 9.0–0=) 9.ab5 Ra1 10.Ba1 Nbd7 (10...0–0 11.Bf6 Bf6 12.d4=) 11.d4 (11.0–0 0–0=) 11...Qa8 (11...0–0 12.0–0=) 12.Nbd2 0–0 13.0–0 Ne4 (13...c6 14.bc6 Bc6 15.Qb3=) 14.Ne4 (14.Bb2 c5+=) 14...Be4= 15.Bd3 Bd3 (15...f5 16.Be4 fe4 17.Nd2=) 16.Qd3+= Nf6 (16...c6 17.bc6 Qc6 18.d5=) 17.Nd2 (17.d5 ed5 18.Bf6 dc4 19.Qc4 Bf6 20.Qc7 Qa5+=). Schiffler,L – Kretschmar, 1952.

6.Be2 Be7 7.c4 h6 8.d4 Qd7 9.Nbd2 d5 (9...0–0 10.0–0=) 10.Ne5 Qd8 11.0–0 dc4 12.Bc4 Bd6 13.Ndf3 0–0 14.Bd3 Nd5 15.a3 Nd7 (15...a6 16.a4=) 16.Nc6+= Qf6? (better is 16...Bc6 17.bc6 Nb8+=) 17.Qc2 (17.e4 a6+–) 17...Kh8 (17...a6 18.e4 ab5 19.ed5 ed5 20.Bb5 Nb8+–) 18.Nfe5?? (18.e4 a6+–) 18...Ne5?? (better is 18...Be5 19.de5 Qg5+/–) 19.de5+– (19.Ne5?! Rfd8+=) 19...Be5 (19...Qg5 20.ed6 cd6 21.f4+–) 20.Be5 Qg5 21.f4 Qg4 22.h3 (22.Rf3 f6 23.Rg3 Qh5+–) 22...Qg3 (22...Qh4 23.e4 Ne3 24.Qf2 Qf2 25.Rf2 (25.Kf2?! Nf1 26.Bf1 f6+/–) 25...Bc6 26.bc6+–) 23.Rf3 Qh4 24.Qb2 (better is 24.e4!? Nf6+–) 24...f6 25.Bd4 a6 (25...Bc6 26.bc6 Rfd8 27.Raf1+–) 26.a4 (26.Qc1 ab5 27.e4 Bc6+–) 26...ab5 27.ab5 Ra1 28.Qa1 Ra8 29.Qb2 Qe1 30.Kh2 Ra1 (30...Qd1 31.Bc4 Kh7+–) 31.Qa1 Qa1 32.Ba1 Bc6 33.bc6 Kg8 1–0. GuestWCNB – GuestWQDJ, freechess.org, 2017.

6.c4 Nbd7

7.Nc3 a6 8.Be2=.

7.Nc3 e5 8.Be2 g6 9.0–0+= Bg7 10.d4 e4 11.Nd2 0–0 12.Qe1 Re8 13.f3 ef3 14.Bf3 Bf3 15.Rf3 Nh5 16.Qf2 Qe7 17.Nd5+/– Qf8?? 18.Nc7+– Rac8 19.Ne8 Re8 20.Rf1 f5 21.e4 f4 22.g4 Nhf6 23.Rf4 Qe7 24.Qh4 Nf8 25.Rf6 Bf6 26.Qf6 Qf6 27.Rf6 Rd8 28.Ba3 Kg7 29.Rd6 Rc8 30.Rc6 Kh6 31.Rc8 (31.Rc8 Kg5 32.Rf8 Kg4 33.e5+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

7.Nc3 Be7 8.d4 0–0 9.Bd3 c5 10.Qc2 (10.bc6!? Bc6 11.0–0=) 10...cd4+= 11.ed4 Rc8 (11...Bf3 12.gf3 Re8 13.0–0+=) 12.Ng5 The pressure on h7 grows (12.0–0 Bf3 13.gf3 d5 14.cd5 Nd5 (worse is 14...ed5 15.Qb3=) 15.Bh7 Kh8–/+) 12...g6 (12...h6!? 13.Nh7 Nh7 (worse is 13...Bg2 14.Rg1 Bb7 15.Nf8 Qf8 16.Qa4+=) 14.Bh7 Kh8–/+) 13.0–0+= d5 14.Qe2 dc4 15.Bc4 Qc7 (15...h6 16.Nh3=) 16.Be6 Bd6 17.Bb3 (17.Bd7 Bh2 18.Kh1 Nd7=) 17...Bh2 18.Kh1 Nh5 (18...Bf4 19.Nh3=) 19.Qe7 f7 draws heavy fire 19...Ndf6? (better is 19...Bd6 20.Qe3 Bf4=) 20.Bf7+– Kh8 21.Qc7 Bc7 22.Bb3 (22.Be6 Rce8 23.d5 h6+–) 22...Nf4 23.f3 h6 24.Ne6 Ne6 25.Be6 Rcd8 26.Rad1 (26.d5 Kh7 27.Rfe1 Bg3+–) 26...Bd5 (26...Nd5 27.Rfe1+–) 27.Rfe1 g5 (27...Kg7 28.Nd5 Nd5 29.Re4+–) 28.Nd5 (28.Ba3 Bd6 29.Nd5 Nd5 30.Bd5 Ba3+–) 28...Nd5 29.Bd5 (29.Re4 Kg7+–) 29...Rd5+/– 30.Re7 (30.a4+/–) 30...Bf4 (30...Bd6!? 31.Rd7 Rf4+–) 31.a4+– Rc8 (31...Ra8 32.Rde1+–) 32.Ra7 Rc2 33.Re1 Do you see the mate threat? 33...Rd8 34.Ba3 Ra2 (34...Rdc8 35.Rb7 Bg3 36.Rf1+–) 35.Be7 Bg3? (35...Rc8 36.Rb7 Re2 37.Bf6 Kg8 38.Rg1+–) 36.Bd8 (better is 36.Bf6!? Kg8 37.Bd8 Be1+–) 36...Be1 Threatening mate... how? 37.Bf6 (37.Kh2 Ba5+–) 37...Kg8 38.Be5 (38.Kh2 Bc3+–) 38...Ra1 (38...Bc3 39.Kh2+–) 39.Kh2 Bf2 (39...Bc3 40.Rg7 Kf8 41.Rc7+–) 40.d5 (better is 40.a5 Bg1 41.Kg3 Re1+–) 40...Re1 41.Bg3 Bg1 42.Kh3 Rd1 43.d6 h5 44.Be5 Kf8 45.g4 (45.Rh7 Bd4 46.Bd4 Rd4+–) 45...h4 (45...Bd4 46.Bd4 hg4 47.Kg4 (47.fg4 Rd4 48.a5 Rd3 49.Kg2 Rd6+–) 47...Rd4 48.Kg5 Rd6 49.f4+–) 46.d7 Ke7 47.d8Q Kd8 48.Bf6 (48.Bf6 Ke8 49.Bg5+–) 1–0. Stuart,J – Van der Volkel,L, corr, 1980.

7.Nc3 Be7 8.d4 d5 9.cd5 Nd5 10.Nd5 Bd5 11.Qc2 0–0 12.Bd3 f5 13.0–0 Bd6 14.Qe2 Qf6 15.Bc4 Be4 16.Rfd1 Kh8 17.g3 Rae8 18.Rac1+= g5 19.d5+/– e5 20.Nd2 g4 21.h3 Nc5+= 22.Ne4 Ne4 23.Bd3 Ng5 24.hg4 fg4 25.Kg2 Nh3 26.Rf1+/– Qf3? 27.Qf3+– Rf3 28.Be2 Ref8 29.Bf3 Rf3 30.Rc3 Kg8 31.Ba3 1–0. pierre – albycoccax, internet, 2007.

7.Nc3 Be7 8.d4 Ne4 (8...0–0 9.Bd3=) 9.Qc2 (9.Ne4 Be4 10.Bd3 Bd3 11.Qd3 a6+=) 9...Nc3= 10.Bc3 Bf6 (10...a6 11.Bd3=) 11.Bd3 Qe7 (11...c5 12.bc6 (worse is 12.Bh7 Bf3 13.gf3 g6 14.Bg6 fg6+=) 12...Bc6 13.Rc1= (worse is 13.Bh7 Bf3 14.gf3 g6 15.Bg6 fg6–/+)) 12.a4 (12.0–0 Bf3 13.gf3 Rc8+=) 12...e5 (12...c5 A) worse is 13.Bh7 cd4 14.Nd4 Bd4 15.ed4 Qh4–/+ (15...Bg2?! 16.Rg1 Nf8 17.Rg2 Rh7 18.a5=); B) 13.bc6 Bc6 14.a5+= (worse is 14.Bh7 Bf3 15.gf3 g6 16.Bg6 fg6+=)) 13.Be4 Be4 14.Qe4 0–0 15.0–0 (15.a5 Qd8+/–) 15...Rfe8 (15...a6 16.a5 ab5 17.cb5 ba5 18.Ra5 Ra5 19.Ba5 ed4 20.Qe7 Be7 21.Nd4+/–) 16.Rfe1 (16.a5 ed4 17.Qe7 Re7 18.Bd4 Bd4 19.ed4 Rae8+=) 16...Qe6 (16...a6 17.Nd2+=) 17.Nd2 (17.Qc6 e4 18.Nd2 Nc5+/–) 17...ed4 (17...a6 18.Qc6+=) 18.ed4 Qe4 19.Ne4 g6 (19...a6 20.Kf1+=) 20.Nf6 (20.a5 Bg7 21.a6 f5+=) 20...Nf6 21.f3 (21.Re8 Re8 22.d5 Nd7+=) 21...Re6 (21...d5 22.c5+=) 22.a5 (22.d5 Re1 23.Re1 Re8+/–) 22...Rae8 (22...Re1 23.Re1 d5 24.c5+/–) 23.Re6 fe6 24.ab6 (24.Kf2 Kf7+/–) 24...ab6+= 25.Ra7 (25.Kf2 Kf7+=) 25...Re7 26.Bb4 (26.Kf2 Kf7+=) 26...Kf7 27.Kf2 (27.Rb7 Rd7+=) 27...c5= ½–½. Schiffler – Muehlmann, Bad Lausick, 1951.

7.d4 g6 8.Nbd2 Bg7 9.Qc2 a6 10.a4 a5 (10...ab5 11.ab5 Ra1 12.Ba1+=) 11.Bd3+= Nh5 12.0–0 0–0 13.Rac1 Re8 14.h3 Rc8 15.Be4 Be4 16.Ne4 Qe7 17.Qb3 Nhf6 18.Nf6 Nf6 19.Nd2 Nh5 20.Nf3 Nf6 21.Qd3 Nd7 22.e4 c6 23.Rfe1 cb5 (23...c5 24.Red1+=) 24.cb5+= Rc1 25.Rc1 Rd8 (25...d5 26.e5+=) 26.Rc7 (26.Ba3 e5+/–) 26...Qe8 (better is 26...Ne5! 27.Re7 Nd3+=) 27.Ba3 Bf8 28.Bb2 Rc8 (28...Bg7!?=) 29.Qc2 Rc7 30.Qc7 h6 31.Ba3 Qe7 32.e5?? (32.Nd2 Qg5 33.Nc4+– (33.Qd7?! Qd2 34.Bd6 Qd1 35.Kh2 Qd4=)) 32...Qe8?? (32...Ne5 33.Qb6 Nc4+=) 33.Bd6+– Bd6 34.ed6 Kg7 (34...f6+–) 35.Ne5 Ne5 (35...Nf6 36.d7 Nd7 37.Qd7 Qf8+–) 36.de5 (36.de5 Qa8 37.Qe7+–) 1–0. GuestLJTQ – guestwushuh, freechess.org, 2017.

7.Be2 a6=.

7.Be2 Qe7 8.Nc3+= Nc5 (8...e5 9.0–0+=) 9.d3 (9.d4 Nce4+=) 9...Ng4 (9...a6 10.a4+=) 10.h3 (better is 10.d4 Nd7 11.0–0+/–) 10...Nf2?? (better is 10...Nf6+=) 11.Kf2+– Qd8 (11...d5 12.cd5 ed5 13.Rf1+–) 12.Na4 (12.Rf1 a6+–) 12...Nd7 (12...Na4 13.Qa4 Qd7+–) 13.Nc3 Qf6?? (13...Nc5 14.Rf1 a6+–) 14.Qd2 (14.Rf1 a6+–) 14...Ne5 15.Ne4 (15.Rhf1 a6+–) 15...Qf5 (15...Be4 16.de4 Be7 17.Rhf1+–) 16.Ng3 (16.Be5 de5 17.g4 Qg6 18.Ne5 Qh6+–) 16...Qg6 (16...Qf6 17.Rhf1+–) 17.Ne5 de5 18.Be5 0–0–0 (18...h5 19.h4 f6+–) 19.Bf3?? (better is 19.d4+–) 19...Bf3+/– 20.gf3 (20.Kf3 f6 21.Bb2 Rd3+/–) 20...Rd3 (20...f6 21.Bb2 Rd3 22.Qe2+/–) 21.Qe2+– Bb4 (21...Bc5 22.Bf4+–) 22.Rhd1 (22.Ne4!? Rd7 23.Rag1 Qh5 24.Bg7 Rhd8+–) 22...Rd1 23.Rd1 f6 24.Bb2 (24.a3 Ba5 25.Bd4 e5+–) 24...Bd6 (24...Rd8 25.Rd8 Kd8 26.f4+–) 25.Ne4 Be7 (25...Qh5 26.Nd6 cd6 27.Kg2+–) 26.Qd3 (better is 26.c5 Bc5 27.Nc5 bc5 28.Qd2+–) 26...f5?? (26...Rd8 27.Qc2+–) 27.Nc3 (better is 27.Qd7 Kb8 28.Qe7+–) 27...Bh4 28.Kf1 Qg3 29.Qe2 Qh3 30.Qg2 Qg3 (better is 30...Qg2 31.Kg2 Bf6+–) 31.Qg3 Bg3 32.Ne2 Bd6 33.Bg7 Rg8 34.Bb2 h5 35.Kf2 h4 (35...Rg6 36.e4+–) 36.Rh1 e5 (36...Be7 37.Nf4 Kd7 38.Rd1 Bd6 39.Bf6+–) 37.Rh4 f4 (37...Kd7 38.Rh7 Ke6 39.f4 ef4 40.ef4 Bc5 41.Bd4+–) 38.ef4 ef4 39.Bd4 (39.Nf4 a6+–) 39...Kb7 (39...Rf8 40.Bc3+–) 40.Nf4 a5 (40...a6 41.a4+–) 41.Be3 a4 (41...Rg5 42.Rg4 Bf4 43.Bf4+–) 42.Rh6 Rg5 (42...Bf4 43.Bf4 Rg7 44.Be5+–) 43.Nd5 Bg3 (43...Rg7 44.Bb6! Bg3 45.Ke3 cb6 46.Rb6 Kc8 47.Ra6+–) 44.Ke2 Re5 (44...Rg7 45.f4 a3 46.Kf3+–) 45.Kd3 (better is 45.Rh7 Rd5 46.cd5 Bd6+–) 45...Rf5 46.f4 Rf7 47.Re6 (better is 47.Ke4 a3+–) 47...Be1 (47...Rh7 48.f5+–) 48.Re7 (better is 48.Bb6 cb6 49.Re1 Rg7+–) 48...Rf8 (48...Re7 49.Ne7 Bb4+–) 49.Rc7 Kb8 (49...Ka8 50.Nb6 Kb8 51.Rd7+–) 50.Rc6 (50.Bb6!? Rd8+–) 50...Ba5 (50...Rh8 51.Rb6 Kc8 52.Ra6+–) 51.Bb6 Bb6 52.Rb6 Kc8 53.Rc6 (53.Ra6 Kb8+–) 53...Kd7 54.Ra6 Rh8 55.Ra4 Rh3 (55...Rh1 56.c5 Ke6 57.Re4 Kf7 58.Re7 Kf8 59.b6 Rd1 60.Ke4+–) 56.Ne3 Kd6 (56...Kc8 57.c5 Rh5 58.Rc4+–) 57.f5 (57.Ra6 Kc7+–) 57...Kc5 58.Ra6 Rf3 59.a3 Re3 60.Ke3 Kc4 61.f6 Kb5 (61...Kc5 62.f7 Kc4 63.Rc6 Kb5 64.Rf6 Kc4 65.f8Q Kb3 66.Qb4 Kc2 67.Rc6 Kd1 68.Qd2) 62.Re6 Ka4 (62...Kc5 63.f7 Kc4 64.f8Q Kd5 65.Rd6 Kc4 66.Qb8 Kc5 67.Qb4) 63.f7 Kb5 (63...Ka5 64.f8Q Kb5 65.Qb4) 64.f8Q Kc4 65.Qc8 (65.Qb4 Kd5 66.Qe4 Kc5 67.Qc6) 65...Kb3 66.Rb6 (66.Rb6 Ka2 67.Qc2 Ka3 68.Qb3) 1–0. jaddwarrior (2015) – QR19KASH (1960), ChessWorld.net, 2016.

7.Be2 Be7 8.0–0 c5 9.d3 Qc7 10.Nfd2 h5 11.f4 0–0–0 12.Bf3 Ng4 13.Bb7 Qb7 14.Qe2 Bf6 15.Ne4 Qc7 16.Nf6 Ndf6 17.a4 d5 18.a5 Kb7 19.h3+– Nh6 20.ab6 ab6? 21.Be5 Qe7 22.Ra7!! (22.Ra7 Kc8 23.Re7+–) 1–0. pierre – albycoccax, ChessHere.com, 2006.

6.Be2 a6

7.a4 ab5 8.ab5 Ra1

9.Ba1 Be7 10.0–0=.

9.Ba1 Nbd7

10.0–0 Be7=.

10.c4 Qa8 11.Nc3 (11.Bc3 d5=) 11...Be7 (11...Ne5 12.Bb2=) 12.0–0 0–0 13.Bb2 ½–½. Ornstein,Axel (2430) – Akesson,Ralf (2520), Rilton Cup Stockholm, 1998.

10.c4 e5 11.d3 Qa8 12.Nbd2 h6 13.0–0 Be7 14.Ne1 0–0 15.f3 Qa2 16.Nc2 Ra8 17.Bc3 d5 18.d4 ed4 19.Bd4 Bc5 20.Bc3 Bd6 21.Qc1 Ne5 22.Rf2 dc4 23.Be5 Be5 24.Nc4 Bc3 25.Bf1 Qb3 26.Nd4 Qb4 27.Ne5 (27.Nb2!?–/+) 27...Ra1–+ (27...Bd4?! 28.ed4 Qd4 29.Qc7+=) 28.Qc2 Nd5 (28...Bd4 29.Nd3 Qb5 30.ed4–+) 29.Qf5 Qe7 (29...Ne3?! A) 30.Nf7?? Nf5 (30...Nf1?! 31.Nh6 gh6 32.Qg6 Kf8 33.Qh6 Ke8 34.Qg6 Ke7 35.Qe6 Kd8 36.Qg8 Kd7 37.Qe6 Kd8 38.Qg8 Kd7 39.Qe6 Kd8=; 30...Qd4 31.Nh6 gh6 32.Qe6 Kf8 33.Qh6 Ke7 34.Qh7 Kd6 35.Qh6 Kc5 36.Qf8 Qd6 37.Qd6 cd6 38.g3–+; 30...Bd4 31.Nh6 gh6 32.Qg6 Kf8 33.Qh6 Ke8 34.Qg6 Kd7 35.Qh7 Qe7 36.Qd3–+) 31.Nh6 Nh6–+; B) 30.Qf7 Kh7 31.Qg6 Kg8 32.Qe6 Kh7 33.Nf5 Nf5 34.Qf5 Kg8 35.Qf7 Kh7 36.Nd7 (36.Qc7? Bd4 37.Qc2 Kg8–+) 36...Qb5 37.Nf8 Kh8 38.Ng6 Kh7 39.Nf8 Kh8 40.Ng6 Kh7 41.Nf8=) 30.Ndc6 Bc6 (better is 30...Qe8!? 31.Qe4 Bc6 32.Nc6 Qe4 33.fe4 Ne3–/+) 31.Nc6= Qe6?? (better is 31...Qe3 32.Qc8 Kh7 33.Qf5 Kg8 34.Qc8 Kh7 35.Qf5 Kg8=) 32.Qd5!+– Qe3 (32...Qd5 33.Ne7 Double attack (33.Ne7 Decoy)) 33.Qc4?? (better is 33.Qd8 Kh7 34.g3+– (34.Qc7?? Rf1 35.Kf1 Qe1)) 33...Be1+= 34.Qe2 Qc5 35.Qe8 (35.Nb8 Bf2 (worse is 35...Qf2 36.Qf2 Bf2 37.Kf2+/–) 36.Qf2 Qb5–+) 35...Kh7–+ 36.Qe2 (better is 36.Bd3 f5 37.Bf5 Qf5 38.Rf1 Bf2 39.Kf2 Qc5 40.Kg3 Rf1 41.Qe4 g6 42.Ne5–/+) 36...Bf2 37.Qf2 Rf1! 38.Kf1 Qb5 (38...Qb5 39.Qe2 Qc6–+) 0–1. Ricbour,Jeremy (2160) – Goasdoue,Vincent (2140), FRA–chT2 Nord, 2008.

10.c4 Be7 11.0–0 Qa8 12.Nc3 0–0 13.d3 e5 (13...Ne5 14.Ne1=) 14.Qc2 Re8 (14...Nc5 15.Bb2+=) 15.Bb2+= c6 (15...Nc5 16.Ra1 Qc8 17.d4 ed4 18.Nd4+=) 16.d4 (16.Ra1 Qc8+/–) 16...c5 17.d5 Qd8 (17...Qb8 18.Ra1+/–) 18.Ra1 Qc7 (18...g6 19.e4+/–) 19.Ng5 (19.e4 Ra8+/–) 19...g6+= 20.Nf3 Bf8 (20...Ra8 21.Ra8 Ba8 22.Bd3+=) 21.Qd1 (21.h3 Ra8+=) 21...Ra8 22.Ra8 Ba8 23.Qa1 Bb7 24.Nd2 (24.Bd3 Nh5+=) 24...Ne8 (24...Be7 25.h3+=) 25.g4 (25.Qa7 Be7+=) 25...Bg7 (25...Ng7 26.Nde4+=) 26.Bd3 (26.Qa7 Bf8+=) 26...Qd8 (26...h6 27.Qd1+=) 27.Nde4 h6 (27...Ndf6 28.Nf6 Nf6 29.Qa7+=) 28.Ng3 (28.Qa7 Qb8 29.Qb8 Nb8+=) 28...Qa8 (28...Nef6 29.f3+=) 29.Qa8+/– Ba8 30.Kg2 (30.h3 Bb7+/–) 30...Bf6 31.Nge4 (31.Nce4 Be7+/–) 31...Bh4 (31...Be7 32.f4+/–) 32.f4 Bb7 33.Na4 Bd8 34.fe5 (34.Bc3 Kf8+/–) 34...de5 35.Ng3 (35.Bc3 Kf8+=) 35...Nd6 36.Nc3 Nf6 37.h3 Kf8 38.Nb1 (38.e4 Nd7+=) 38...Nd7 (38...e4 39.Bf6 Bf6 40.Ne4 Ne4 41.Be4+=) 39.Nd2 (39.Bc3 Bg5 40.Kf2 Bh4+/–) 39...Bc8 (39...Bg5 40.Kf2+/–) 40.Nge4 (40.Kf3 Bh4+/–) 40...Ne4 41.Ne4 Ke7 42.Kf2 (42.Bc2 Bc7+/–) 42...Bc7 43.Bc2 (43.Nd2 Nf6+/–) 43...Nf6+= 44.Nd2 Bd6 (44...Nh7 45.Kg2+=) 45.Nf3+/– Nd7 46.Kg2 (46.Bc3 Bb8+/–) 46...Ke8 47.Kf2 Ke7 48.Ke2 ½–½. Nemec,Zdenek – Efthimakis,Dimitris, b2–b4.com, 2004.

10.d4 Be7 11.0–0 0–0 12.c4 Qa8 13.Nbd2 Qa2 14.Bd3 d5 (14...Ra8 15.e4=) 15.Qc2 (15.cd5 ed5 16.Bf5 c5+=) 15...Qc2 16.Bc2 Ra8 17.Bb3 c6 18.bc6 Bc6 19.Bb2 (19.Rc1 dc4 20.Bc4 Bd5=) 19...dc4 20.Nc4 Bd5 21.Ra1 (21.Ncd2 b5+=) 21...Ra1 22.Ba1 Bb4 (22...b5 23.Ncd2+=) 23.Ncd2 Kf8 (23...b5 24.Bc2+=) 24.Kf1 (24.Bc2 g5 25.Nb3 Be4 26.Be4 Ne4+=) 24...Ke7 (24...Bb3 25.Nb3 b5 26.Ne5+=) 25.Ba4 (25.Bc2 Bc6=) 25...Kd8 (25...g5 26.h3–/+) 26.Bb5 (26.Bc2 Bc6=) 26...Kc7 (26...h5 27.Bb2+=) 27.Ke2 (27.Bd3 Bc6=) 27...h6 28.Nc4 (28.Bd3 Bd2 29.Kd2 Kc6=) 28...Ne4+= 29.Nfe5 (29.Bb2!?+=) 29...Ne5–/+ 30.Ne5 Bc3 (30...Bc3 31.f3 Ba1 32.fe4 Be4 33.Nf7 Bg2+=; 30...Nd6 31.Bd3–/+) 0–1. Schiffler – Dittmann,Sieghard, Bad Lausick, 1951.

6.Be2 Nbd7

7.0–0 a6=.

7.c4 Be7 8.0–0 0–0 (-->1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.Be2 d6 8.0–0 Nbd7).

7.d4 a6 8.c4=.

7.d4 Be7 8.0–0 0–0 9.Nbd2 c5 10.c4 Qc7 11.Qc2 h6 12.a4 Rfe8 13.dc5 Nc5 14.Ne1 Rad8 15.f4 Nce4 16.Bf6 (16.Bd3 d5 17.Be5 Bd6 18.Ne4 Be5 19.fe5 Ne4 20.cd5 Qc2 21.Bc2 ed5+=) 16...Bf6–/+ 17.Rc1 Nd2 (17...Nc3!? 18.Nb1 Ne2 19.Qe2 e5 20.fe5 Be5–/+) 18.Qd2= e5 19.Nc2 (19.Bf3 ef4 20.ef4 Bf3 21.Nf3 Re4+=) 19...d5 20.cd5 Rd5 21.Qe1 (better is 21.Nd4!? Qd6 22.fe5 Rde5 23.Qd1–/+) 21...Rc5–+ 22.fe5 Qe5 (22...Be5 23.Qd2–+) 23.Bd3 (23.Qf2 Be4 24.Nb4 Rc1 25.Rc1 Bg2 26.Kg2 Qe4 27.Qf3 Qb4–/+) 23...Qg5 (23...Bg2!? 24.Rf5 Qe6 25.Rc5 bc5–+) 24.Qe2 Rc2 (better is 24...Qh4 25.g3 Rg5–/+) 25.Rc2+= Re3 26.Qd2 Bd4 27.Bh7 Kh7 28.Qd4 Re4 29.Qf2 (29.Qd2 Qg6 30.a5 Re5 31.ab6 ab6+=) 29...Bd5+= 30.a5 Bc4 31.ab6 ab6 32.Rfc1 Qb5 33.Rb2 (33.Rc3 Be6=) 33...Qg5+= 34.Qc2 Qe3 35.Kh1 Bd3 36.Qd1 Rd4 37.Rd2 (37.Rb6?? Be4 38.Rb2 Rd1 39.Rd1 f5–+) ½–½. Plock,Joerg – Paul, corr, 1995.

7.d4 Be7 8.Nbd2 0–0 (8...a6 9.ba6 Ba6 10.c4=) 9.Bd3 (9.0–0 a6=) 9...c5 (9...a6 10.ba6 Ba6 11.c4=) 10.c4 (10.0–0 cd4 11.ed4 Nd5=) 10...Qc7 (10...cd4 11.ed4 (11.Bd4? e5–+) 11...d5 12.0–0+=) 11.Rc1 (11.0–0 cd4 12.ed4 Rfc8=) 11...Rfe8 (11...a6 12.a3=) 12.Qc2 (12.0–0 a6 13.ba6 Ra6=) 12...Rad8 (12...a6 13.ba6 Ba6 14.Qb3=) 13.0–0 h6 (13...Ra8 14.Ng5 h6 15.Nge4=) 14.h3 (14.Rfd1 Ra8=) 14...Bf8 (14...Ra8 15.Rfe1=) 15.Rfd1 Ba8 (15...cd4 16.ed4 (16.Bd4? e5–+) 16...Ra8 17.a3=) 16.Ne1 (16.Ne4 Be7+=) 16...e5 (16...cd4 17.ed4 d5 18.Qa4=) 17.d5+= Bb7 18.a4 (18.Rb1 Ra8+=) 18...Re7 (18...Be7 19.Nef3+=) 19.g4 (19.Ra1 a6+=) 19...Rde8= 20.f3 Bc8 (20...g6 21.h4=) 21.Ng2 (21.h4 a6+=) 21...g6 22.e4 (22.h4 Nb8=) 22...Bg7= 23.Nf1 (23.Ne3 Nh7=) 23...Nf8 (23...Nh7 24.Nd2=) 24.Ng3 (24.Nd2 a5=) 24...Qd8 (24...N8h7 25.Ne3=) 25.Bc3 (25.Rf1=) 25...g5 (25...a5 26.Rf1=) 26.Ne3 (26.a5 ba5 27.Ra1 Rb7+=) 26...Ng6 27.Nef5 (27.Ngf5 Rb7+=) 27...Rb7 28.Ra1 White intends a5 (28.Ne2 Qc7+=) 28...Nf4= 29.Bf1 (29.Kh2 a5+=) 29...h5 (29...a5!?=) 30.a5+/– h4 (30...hg4 31.fg4 Qc7 32.Ng7 Kg7 33.Ne2+/–) 31.ab6 ab6 32.Ne2 (32.Ng7 Kg7 33.Ne2 Ne2 34.Qe2 Nh7+/–) 32...Bf5 33.ef5 (33.gf5 N6h5+/–) 33...Ne2 (33...Rbe7 34.Qb2 Ne2 35.Qe2+/–) 34.Be2 (34.Qe2 Nd7+/–) 34...e4+= 35.Ra6 (35.Rf1 ef3 36.Bf3 Nd7+=) 35...ef3 36.Bf3 Re3 (36...Rbe7 37.Rda1+=) 37.Bg2 (37.Rd3 Re8+/–) 37...Nd7 (37...Nh7 38.Rd3 Re8 39.Bg7 Kg7 40.Qc3 Qf6 41.Kf2+=) 38.Bd2 Re8 39.Qc1 Bd4 40.Kh1 Bf6 41.Re1 Re1 42.Be1 Kg7 (42...Ne5 43.Bd2+=) 43.Ra3 (43.Bd2 Ne5+=) 43...Ne5+= 44.Bc3 (44.Bd2 Rd7+/–) 44...Qe7 (44...Re7 45.Kg1+=) 45.Ra8 Kh7 46.Bf1 (46.Qa1 Kg7+=) 46...Kh6 (46...Ra7 47.Ra7 Qa7 48.Qb2+=) 47.Qa1 (47.Ra6 Kg7+=) 47...Kg7 48.Bg2 Nd7 49.Qe1 (49.Bf6 Qf6 50.Qf6 Kf6=) 49...Qe1 50.Be1 Ne5 51.Bf1 Nd7 (51...Re7 52.Bf2+=) 52.Kg2 Ne5 (52...Bd4 53.Bd2 f6 54.Be2+=) 53.Bd2 (53.Ra6 Rb8+/–) 53...Nd7 (53...Re7 54.Be2+=) 54.Kf2+/– Ne5 55.Be2 (55.Ra6 Rb8+/–) 55...Nd7 (55...Re7 56.Be3+=) 56.Ke1 (56.Bc1 Bd4 57.Ke1 f6+=) 56...Ne5 57.Kd1 (57.Ra6 Re7 58.Kd1 Nd7+/–) 57...Nd7 (57...Re7 58.Ra6 Nd7 59.Bd3+/–) 58.Kc2+/– Ne5 59.Be3 (59.Ra6 Kf8+/–) 59...Nd7 (59...Re7 60.Bc1+/–) 60.Bg1 Be5 61.Bd3 Bf4 62.Bf2 Be5 (62...Rb8 63.Ra7 Nf6 64.Ra6+=) 63.Be3+/– Bf6 64.Bd2 (64.Ra6 Nb8 65.Ra3 Re7+=) 64...Nb8 (64...Ne5 65.Ra6+/–) ½–½. Schiffler,L – Seiffert,Ronny Steffen, Schwerin, 1951.

5.Nf3 Bd6

6.c4 a6 7.Nc3=+.

6.c4 c5 7.Be2 0–0 (7...a6 8.ba6 Na6 9.0–0=) 8.0–0 a6 9.a4 (9.d4 cd4 10.ba6 Na6 11.Bd4 Nc5=) 9...ab5 (9...Qc7 10.Bf6 gf6 11.Kh1=) 10.ab5 Ra1 11.Ba1 h6 (11...Bc7 12.d4=) 12.Nc3 (12.d4 Be4+=) 12...Re8 (12...Qc7 13.h3=) 13.d4 (13.d3 Bc7+=) 13...Be7 (13...Qc7 14.d5+=) 14.dc5 bc5 15.Nd2 (15.Qd3 d5+=) 15...d5= 16.Na4 (16.Nf3 Bd6=) 16...Nbd7 17.Bf6 (17.Qc2 Bd6=) 17...Bf6 (worse is 17...gf6 18.cd5 ed5 19.Nf3+=) 18.Nb3 (18.cd5 ed5 19.Bg4 Be7=) 18...Qc7+= 19.cd5 ed5 (19...Bd5 20.Qc2+=) 20.Qc2 Pawn c5, live or die! (20.b6 Qd6 21.Na5 Rb8+=) 20...c4+= 21.Rc1 (21.Nd4 Nb6 22.Nc3 Bd4 23.ed4 Qf4=) 21...Rc8 (21...Nb6 22.Nbc5+=) 22.Bg4 Ra8 23.Nd4 Nb6 24.Nb6 (24.Nc3 Bd4 25.ed4 Qf4+=) 24...Qb6 25.Qb2 Re8 (25...Bc6 26.Qb1 Be8 27.Bf3 Bd4 28.ed4+=) 26.Bf3 (26.Bd7 Rd8 27.Bg4 Rb8+=) 26...Rc8 27.Qc3 (27.Bg4 Rc5+=) 27...Qc5 (27...Bd4 28.Qd4 Qb5 29.h3–/+) 28.Rb1= Qb6 (28...Ra8 29.Qd2=) 29.g3 (29.Rc1 Bd4 30.Qd4 Qb5+=) 29...Rc5+= Attacking the isolated pawn on b5 30.Kf1 Rc7 (30...Bc6 31.Kg2+=) 31.Ke2 (31.Kg2 Be5=) 31...Re7 (31...Be5 32.Kf1+=) 32.Kf1= Rc7 (32...Be5 33.Kg2=) 33.Ke2 Re7 (33...Be5 34.Kf1+=) ½–½. Melzig,Ernst – Till,Heinz, GER–ch Seniors, 2001.

6.Be2 0–0 7.0–0 c6 8.a4+= Bc7 9.d4 d5 (9...d6 10.c4+=) 10.c4= dc4 (10...Nbd7 11.bc6 Bc6 12.Nc3+=) 11.Bc4+= a6 (11...Nbd7 12.bc6 Bc6 13.Nbd2+=) 12.Nc3 cb5 (12...Nbd7 13.bc6 Bc6 14.Ba3+=) 13.ab5+/– ab5 (13...a5 14.Ne5+/–) 14.Nb5 (14.Ra8 bc4 15.Ra4 Nbd7 16.Rc4 Ba6+/–) 14...Nc6 (14...Ra1 15.Qa1 Bf3 16.gf3+/–) 15.Ra8 Ba8 16.Ba3 Re8 17.Qc2 (17.Qe2 Bb7+/–) 17...Bb8 18.Bd3 (18.Ra1 Na5 19.Be2 Qd7+=) 18...Qc8 (18...g6 19.e4+/–) 19.Ng5 h6?? (better is 19...g6+/–) 20.Bh7 (20.Bh7 Nh7 21.Qh7) 1–0. DEFFM – troubadour, freechess.org, 2018.

6.Be2 a6=.

6.Be2 Qe7 7.0–0 a5 (7...a6 8.Nd4=) 8.d4 Nd5? (better is 8...0–0=) 9.e4+– Nf4 10.e5 Ne2 (10...Bb4 11.a3+–) 11.Qe2 Bb4 12.a3 Bc5 13.dc5 Qc5 14.c4 d6 (14...0–0 15.Rd1+–) 15.Nbd2 Nd7 (15...de5 16.Ne5 Qe7+–) 16.Nb3 1–0. DEFFM – GuestGCNW, freechess.org, 2018.

5.Nf3 Be7

6.c4 0–0 7.Be2 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 Be7 7.Be2 0–0).

6.c4 c6 7.Be2 c5 8.Nc3 0–0 9.Qc2 d5 10.0–0 d4 11.Na4 Be4 12.d3+/– Bg6 13.Ne5 Bd6? 14.Ng6+– fg6 15.Bf3 Nbd7 16.Ba8 Qa8 17.Qe2 Qb8 18.f4 e5 19.ed4 ed4+/– 20.Qe6 Kh8 21.g3 h6 22.Rae1+– Re8 23.Qf7 Rf8 24.Qg6 Re8 25.Re8 Qe8 26.Qe8 Ne8 27.Re1 Nef6 28.Re6 Bc7 29.Rc6 Bd8 30.Rc8 Ng4 31.Rd8 (31.Rd8 Kh7 32.Rd7+–) 1–0. marre – oppo, internet, 2010.

5.Nf3 g6

6.a4 Bg7 7.Nc3 0–0 8.h3 c6 9.Be2 c5 10.d4 Qe7 11.0–0 Ne4 12.Ne4 Be4 13.Rb1 f5 14.Ne5 d6 15.Nd3 Qg5 16.Bf3 d5 17.Be4 fe4= 18.Ne5 Be5 19.de5 Nd7 20.Qg4 Qe7 21.f4 Rf5 22.Qe2 Qg7 23.c4 Qh6 24.cd5 ed5 25.Rbd1 Qf8 26.Rd5 Qf7? 27.Rfd1 Rd8 28.g4 Rf4 29.ef4 Qf4 30.Rd7 Rf8 31.Rf1 Qg3 32.Qg2 Qe3 33.Kh2 Rf1 34.Qf1 Qf3 35.Qf3 ef3 36.Kg3 Kf8 37.Kf3 Ke8 38.Rh7 Kd8 39.e6 Ke8 40.Bf6 Kf8 41.e7 Ke8 42.Rh8 Kf7 43.e8Q Kf6 44.Qd8 Ke5 45.Re8 1–0. j1a9n55 – dzigit101, kurnik, 2011.

6.c4 a6 7.a4 Bg7 8.d4 0–0 9.Be2 c6 (9...d6 10.0–0=) 10.Nc3 ab5 (10...d6 11.0–0+=) 11.ab5+= Ra1 12.Qa1 d5 (13.cd5 Nd5+=). Nemec,Zdenek – Riha,Martin, CSR CF, 1990.

6.c4 a6 7.Be2 ab5 8.cb5 Bg7=.

6.Be2 a6=.

6.c4 Bg7

7.Qc2 a6 8.Be2=.

7.Qc2 Rg8 8.Be2+= Ng4 (8...h6 9.0–0+=) 9.Bg7+/– Rg7 10.h3 (10.0–0 a6+/–) 10...Qf6 (10...Nf6 11.Nc3+=) 11.Nc3 Ne5 12.Ne5 Qe5 13.f4 Qf6 14.0–0 Qh4 15.Bf3 Bf3 16.Rf3 Qf6 (16...f5 17.e4+=) 17.Qe4+/– c6 18.d4 Qe7 19.Qc2 Qb4 20.Rb1 (better is 20.Qd3!?+/–) 20...Qc4= 21.Qd2 cb5 (21...d5!?=) 22.Nb5+= Nc6?? (better is 22...Kf8+=) 23.Nd6+– (23.Nd6 Kf8 24.Nc4+–) 1–0. GuestJRTR – GuestVJYH, freechess.org, 2017.

7.d4 a6=.

7.Be2 a6 8.0–0 ab5 9.cb5 Nh5 10.Bg7+= Ng7 11.Nc3 g5 12.Ne5 h5 13.Bf3 Qc8 14.Ne4?? g4–/+ 15.Rc1 gf3?? 16.Nd6!!+– Kd8 17.Nc8 fg2 18.Nf7 Kc8 19.Nd6 Kd8 20.Nb7 Ke8 21.Kg2 Rg8 22.Rc7 e5 23.Rc8 Kf7 24.Nd6 Ke6 25.Rg8 Kd6 26.Rg7 Ra7 27.Rg6 Ke7 28.Qh5 d6 29.Qh7 (29.Qh7 Ke8 30.Rg8#) 1–0. pier_e – orlandobosca, internet, 2009.

7.Be2 c5 8.d3 (8.Nc3 d6=) 8...a5 (8...0–0 9.Nbd2=) 9.a4 d6 10.0–0 0–0 11.Qc2 Nbd7 12.d4 (12.Nbd2 Qc7=) 12...Qc7 13.Nbd2 Rac8 14.dc5 (14.Ng5 cd4 15.ed4 e5+=) 14...dc5 (14...Nc5!? 15.Rfd1 Rfd8+=) 15.Rfd1= Rfd8 16.Rac1 Ne8 17.h4 (17.Bg7 Ng7 18.Qb2 Ne8=) 17...h5 (17...Bb2 18.Qb2 Nef6 19.Nh2+=) 18.Bg7 Ng7 19.Ng5 (19.Qb2 Nf5=) 19...Ne5 (19...Nf5 20.Nde4=) 20.f4 Ng4 21.Bg4 hg4 22.Nde4 Rd1 (22...Be4!? 23.Ne4 Qe7=) 23.Rd1+= Be4 24.Ne4 Rd8 25.Nf6 Kf8 26.g3 (26.Ng4!? Nf5 27.Kf2+=) 26...Rd1 27.Qd1 Ke7? (better is 27...Nh5!? 28.Nd7 Kg7=) 28.Ng4+/– Nf5 29.Kf2 Qd6 30.Qc2 Ng7 (30...Kf8!?+/–) 31.Ne5+– Nf5 (31...Ne8 32.Nc6 Kf8 33.e4+–) 32.Nc6 (32.g4!? Nh6 (32...Nh4 33.Kg3+–) 33.Ke2 Kf8+–) 32...Kd7 (32...Kf8 33.Qc3 Kg8 34.e4+–) 33.Qe2 (33.g4 Nh6 (33...Nh4?? 34.Kg3+–) 34.Ne5 Kc7+–) 33...Ne7 (33...f6 34.Kg2+/–) 34.Ne5+– Ke8 35.g4 f5?? (better is 35...f6 36.Nf3 Kf8+–) 36.g5 Qd8 (36...Kf8+–) 37.Qd3 (better is 37.h5 Kf8 38.hg6+–) 37...Qd3 38.Nd3 Kd7? (better is 38...Kf7+–) 39.Ne5 Ke8 (39...Kc7 40.Kg3 Kd6 41.h5 gh5 42.Kh4+–) 40.Kg3 Kd8 (40...Kf8 41.Nd7 Ke8 42.Nb6 Kd8+–) 41.Nc6 Kd7 42.Ne7 Ke7 43.h5! Kf7 (43...gh5 44.Kh4 Decoy) 44.h6 (better is 44.hg6 Kg7 45.Kh3+–) 44...Kg8 45.Kf3 Kh7 46.e4 Kh8 ½–½. Nikolic,Jovane (1775) – Ribeiro,Glauber, Sao Paulo BRA, 2nd Karman Mem, 2014.

7.Be2 d6 8.0–0 0–0 9.d4 Nbd7 (9...a6 10.Nc3=) 10.Nbd2 (10.Nc3 a6+=) 10...c5= 11.Qc2 (11.bc6 Bc6 12.Bd3 Qc7=) 11...a5 (11...a6 12.ba6 Ra6 13.Rfb1=) 12.ba6 (12.Rfe1 cd4 13.ed4 Rc8=) 12...Ra6 13.a4 Ra8 (13...Qc7 14.d5=) 14.Rfb1 Qc7 15.Bd3 (15.Qb3 Rfc8=) 15...Ra7 (15...cd4 16.ed4 Rfc8 17.Qb3=+) 16.Qb3 (16.e4 cd4 17.Nd4 Raa8=) 16...Rfa8=+ 17.Qa3 (17.Ra2 Bc6=+) 17...Bc6 (17...Qc6 18.Bc2=+) 18.Bc2 Ra6 (18...cd4 19.Nd4 Nc5 20.Nc6 Qc6 21.Bd4=) 19.e4 cd4 (19...d5 20.cd5 ed5 21.dc5 de4 22.cb6 Nb6 23.Be5–/+) 20.Nd4= Nc5 21.Nb5 (21.Qf3 Nfd7 22.Nb5 Bb5 23.cb5 Bb2 24.Rb2 A) 24...Na4? 25.Rba2 Ra5 26.Ba4+– (< 26.Ra4 Qc2 27.Ra5 Ra5 28.Ra5 ba5–/+); B) 24...R6a7=) 21...Qb8 22.f3 Ne8 23.Bg7= Kg7 24.Nf1 Qd8 25.Rd1 Qe7 26.Ne3 Na4 27.Nd6+= Nc5 28.Qc3 Qf6 29.e5 Qg5 30.Ra6 Ra6 31.Ng4 h5 32.Ne8 Be8 33.Nf6 Ra8 34.Rb1 Ba4 35.Ba4+/– Na4 36.Qd4 Qf5 37.Ra1 Qc2 38.Qf4 Qf5 39.Qf5+– ef5 40.Nd5 Ra6 41.h3 Kf8 42.h4 Nc5 43.Ra6 Na6 44.Nb6 Ke7 45.f4 Nc5 46.Kf2 Ne6 47.Ke3 Kd8 48.Nd5 Kd7 49.Nf6 Kc6 50.Ne8 Kc5 51.Nd6 Kb4 52.Nf7 Kc4 53.Ng5 Nc7 54.Kf3 Kd5 55.Kf2 Ne8 56.Nf7 Ke4 57.Kg3 Ng7 58.Nh8 Ne6 59.Ng6 Ke3 60.Kh2 Ke4 61.g3 Ke3 62.Ne7 Ke4 63.Ng8 Ke3 64.Nf6 Nd4 65.Nh5 Kf2 66.Ng7 Nf3 67.Kh1 Kg3 68.e6 Kf4 69.e7 Nh4 70.e8Q Nf3 71.Qa4 Kg5 (72.Ne6 Kf6+–; 71...Ke5 72.Qb5 Kf6 73.Qb2 Ne5 74.Ne8 Ke6 75.Nc7 Kd6 76.Qb6 Nc6 77.Na6+–). Machete (2295) – Beauquist (2460), ICC, 2003.

7.Be2 d6 8.0–0 Nbd7 9.d4 0–0 10.Nbd2 a5 11.Qc2+= Re8 12.Rad1 (12.Rfd1 c6+=) 12...Qe7 13.a3 (13.e4 e5 14.d5 a4+=) 13...Rab8 (13...e5 14.de5 de5 15.Nb1=) 14.Ng5 (14.e4 c5+=) 14...h6 (14...e5 15.Bf3+=) 15.Ngf3 Kh8 (15...c5 16.bc6 Bc6 17.Rb1+=) 16.e4 Kg8 17.e5 (17.Bd3 e5+=) 17...de5 (17...Nh5 18.Rfe1+=) 18.Ne5 Ne5 19.de5 Nd7 20.f4 Nc5 (20...Red8 21.Ne4+=) 21.Bf3 h5 (21...Rbd8 22.Bb7 Nb7 23.Nf3+=) 22.Bb7+/– Rb7 (22...Nb7 23.Nf3+/–) 23.Nf3 Rbb8 (23...Rd8 24.Nd4 Qh4 25.Nc6 Rd1 26.Qd1+/– (worse is 26.Rd1 Qf4 27.Qe2 Bf8+=)) 24.Nd4 Bh6? (better is 24...Ra8!?+/–) 25.Nc6+– (25.Nc6 Qh4 26.Nb8 Rb8 27.Rd4+–) 1–0. DEFFM – GuestSPSJ, freechess.org, 2018.

7.Be2 d6 8.a4 Nbd7 9.d4 (9.0–0 c5=) 9...d5 (9...0–0 10.0–0=) 10.Nbd2 dc4 (10...c5 11.bc6 Bc6 12.0–0+=) 11.Bc4 (11.Nc4 0–0+=) 11...Bd5 (11...c5 12.0–0=) 12.Qc2+= Rc8 13.e4 (13.Bd5 Nd5 14.e4 Ne7+=) 13...Bc4 (13...c6 14.e5 Nh5 15.0–0+=) 14.Qc4 (14.Nc4 0–0+/–) 14...0–0 (14...Ng8 15.0–0+=) 15.Rc1 (15.Ba3 Re8+=) 15...Re8 (15...Nb8 16.0–0+=) 16.0–0+/– Bf8 (16...Nb8 17.Qe2+/–) 17.h3 (17.Rfd1 Nh5+/–) 17...Nb8 18.Qc3 (18.Qe2 c6+/–) 18...Nfd7 (18...a5 19.Rfd1+/–) 19.d5 f6 (19...e5 20.a5+/–) 20.de6+– Re6? (better is 20...Nc5+–) 21.Qb3 Qe7 (21...Qe8 22.Nd4 Kf7 23.f4+–) 22.Nd4 Nc5 (22...Kf7 23.Ba3!! Qe8+–) 23.Rc5 bc5 24.Ne6 Nd7 (24...c6 25.Nc5 Qf7 26.Ne6+–) 25.Nc5 Kh8 (25...Kg7 26.Ne6 Kh8 27.Rc1+–) 26.Nd7 (26.Nd7 Qd7 27.Bf6 Bg7 28.Bg7 Kg7 29.Qc3 Kg8 30.Rc1+–) 1–0. GuestCYLT – GuestSPSJ, freechess.org, 2018.

7.Be2 Nh5 8.Bg7 Ng7 9.Nc3 Qf6 10.Bd3 a6 11.Be4 Be4 12.Ne4 Qe7 13.Qa4 0–0 14.Rc1 d5 15.cd5 ed5 16.Nc3 Qd7 17.0–0 Ne6 18.d4 c6 19.bc6+– Nc6 20.Nd5! b5?? 21.Nf6 Kg7 22.Nd7 ba4 23.Nf8 Nb4 24.Ne6 fe6 25.Rc7 Kf6 26.Ne5 Na2 27.Rf7 Kg5 28.f4 Kh6 29.Rf3 Rf8 30.Rh3# 1–0. pierre – orlandobosca, internet, 2009.

7.Be2 0–0

8.0–0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 d6 12.Nc3 Nbd7 13.Nd4 Qa8 14.Nf3 d5 15.d3 e5 16.Bb2 e4 17.de4 Ne4 18.Nd5 Bb2 19.Ne7 Kg7 20.Qd7 Nc3 21.Qd4 f6 22.Qd2 Ne2 23.Qe2 Bf3 24.gf3 Be5 25.Nc6 Bd6 26.Rd1 Qc8 27.Nd4 Re8 28.Qf1 Qd7 29.e4 Qe7 30.Nc6 Qe6 31.Rd5 Ra8 32.Nd4 Qf7 33.Qe2 Ra1 34.Kg2 Kh8 35.Qd2 g5 36.Nf5 g4 37.fg4 Qg6 38.h3 Qg5 39.Qd4 Qc1 40.Qf6 1–0. machete99 (Bonetti) (2155) – Knightflight (2560), ICC, 2002.

8.0–0 c5 9.Qc2 d6 10.a4 e5 11.Nc3 Nbd7 12.d4 ed4 13.ed4 Ng4 (13...cd4 14.Nd4 Qc7 15.Rfe1+=) 14.d5 Nde5 15.Ne5 de5?? (better is 15...Ne5 16.Rae1 Re8+=) 16.Bg4+– Qg5 (16...a5 17.Be2+–) 17.Bd7 (better is 17.Bf3 a6+–) 17...e4 (17...Qh4 18.Qe4 Qe4 19.Ne4+–) 18.Ne4 (worse is 18.Qe4 Qd2 19.Rab1 Bc3+–) 18...Qe7 19.Bg7 Kg7 20.Qc3 Kg8 (20...f6 21.Be6 Rfd8+–) 21.Nf6 Kg7 22.Ne8 Kg8 (22...Kh6 23.Qh3 Qh4 24.Qh4) 23.Qg7 1–0. DEFFM – capcus, freechess.org, 2018.

8.0–0 d5 9.Qc2 dc4 10.Qc4 Bd5 11.Qc2 c5 12.Nc3 Bb7 13.Rad1 Nbd7 14.d4 cd4 15.Nd4 Qc7 16.Bf3 (16.Rd2 Rfd8+=) 16...Bf3= 17.Nf3 Ne5?? (better is 17...a6=) 18.Ne5+– Qe5 19.Nd5 Qg5 (better is 19...Qd5 20.Rd5 Nd5 21.Bg7 Kg7 22.Qb2 f6+–) 20.Ne7?? (better is 20.Nf6 Bf6 21.f4 Qb5 22.Bf6+–) 20...Kh8+= 21.f4 (21.Qd3 Qh4+=) 21...Qh5 (21...Qb5 22.Bd4+=) 22.Rf3 (better is 22.Qd3!?+=) 22...Qb5+= 23.Rh3 (better is 23.e4+=) 23...Rfe8?? (better is 23...Qc5 24.Qc5 bc5–/+) 24.Rh7?? (better is 24.Bf6 Bf6 25.Ng6 Kg7 26.Ne5 Be5 27.a4+/– (27.fe5?! h6 28.Rf1 Qe5 29.Rg3 Qg3 30.hg3 Re7+–; 27.Qh7 Kf8 28.fe5 Qe5+–)) 24...Kh7–+ 25.Ng6 (25.Bf6 Bf6 26.Nc6 Rec8–+) 25...fg6 26.f5 (26.Bf6 Bf6 27.Qb3 Qe2–+) 26...ef5 27.Bf6 Bf6 28.g4 (28.a4 Qc5 29.Qc5 bc5 30.Rd7 Kh6–+) 28...Qc5 (28...Re3 29.Qg2 Bd4 30.Qf2–+) 29.Rd7 Re7 30.Re7 (30.Qc5 bc5 31.Rd5 Re3 32.gf5 Bd4 33.fg6 Kg6–+) 30...Qe7 (30...Qe7 31.Qd3 fg4–+) 0–1. GuestKGMW – Guestrdt, freechess.org, 2017.

8.0–0 d5 9.Nc3 dc4 10.Ba3 c6 11.Bf8+/– Bf8 12.Bc4 cb5 13.Nb5 a6 14.Nbd4 b5 15.Bb3 Bg7 16.Rc1 Ne4 17.Qc2+– Nd7 18.Qc7 Ndc5 19.Rc5 Nc5 20.Qc5 Bf3 21.Nf3 Rc8 22.Qb4 Qd3 23.Qe7 Bf8 24.Qb7 Rd8 25.Qa6 b4 26.Qd3 Rd3 27.Rc1 Kg7 28.Kf1 Kf6 29.g4 h6 30.Ke2 Rd7 31.d4 Rb7 32.e4 g5 33.Ke3 Ra7 34.Rc6 Kg7 35.d5 ed5 36.ed5 Re7 37.Kd3 Rc7 38.Rc7 1–0. bshm – nalb, internet, 2009.

8.0–0 d5 9.cd5 Nd5 10.Bg7 Kg7 11.a4 Qf6 12.Ra3 Nd7 13.d4 Kh8 14.Nc3 Qe7 15.Qc1 N7f6 16.Ne5 Nc3 17.Rc3 Rac8 18.Rc2 Be4 19.Bd3 Bd3 20.Nd3 Nd5 21.e4 Nf6 22.f3 Qd7 23.Qb2 Kg8 24.Rd1 Qe7 25.Ne5 Nh5 26.Nc6 Qg5 (26...Qd6 27.Qb4 (27.Na7?! Ra8 28.Nc6 Ra4+/–) 27...Qb4 28.Nb4+–) 27.Na7 Nf4? (27...Ra8 28.Rc7 Nf4+–) 28.Nc8 Rc8 29.a5! ba5 30.b6 Nd3 (30...c6+–) 31.Rd3 (31.Rd3 c6 32.b7+–) 1–0. Janek – Gerard, internet, 2016.

8.0–0 d6 9.d4 Nbd7 10.Nc3 c5 11.Rc1 a5 12.Re1 e5 13.d5 Nh5 14.e4 f5 15.ef5 Rf5 16.Nd2 Bh6 17.Bg4 Rf8 18.Bh5 gh5 19.Nde4 Bc1 20.Bc1 Nf6 21.Bg5 Bc8 22.Nf6 Rf6 23.Ne4 Bf5 24.Nf6 Kh8 25.f4 Ra7 26.fe5 Rg7 27.ed6 Rg5 28.Re8 1–0. phildo (1845) – hector_hrc, gameknot.com, 2013.

8.Qc2 c5 9.0–0=.

8.Qc2 c6 9.a4 (9.0–0 a6=) 9...Qc7 (9...a6 10.0–0=) 10.Nc3 (10.0–0 cb5 11.ab5 Ng4=) 10...cb5 (10...Rc8 11.0–0=) 11.cb5 (11.Nb5 Qc6+=) 11...Ne4 (11...a6 12.Rc1=) 12.d4 (12.Rc1 Rc8+=) 12...Nc3 13.Qc3 Qc3 14.Bc3 a6 (14...Rc8 15.Rc1+=) 15.Kd2 a5 16.h4 (16.Bb2 h6+=) 16...d5 (16...h5 17.Rhg1=) 17.h5 Nd7 18.Bb2 (18.Bd3 gh5 19.Rac1 Nf6+=) 18...Rfc8 (18...Nf6 19.hg6 Ne4 20.Ke1 fg6 21.Rc1+=) 19.Ba3 (19.hg6 hg6 20.Rac1 Rc1 21.Rc1 Rc8+=) 19...Re8 (19...Nf6 20.hg6 Ne4 21.Ke1 hg6 22.Ne5 Be5 23.de5=) 20.hg6+/– fg6 (20...hg6 21.Rac1 Rac8 22.Bd6+=) 21.Bd3 (21.Rac1 Rac8+/–) 21...Nf6 (21...e5!? 22.Ne5 Ne5 23.de5 Be5=) 22.Ne5+/– Ne4 (22...Rac8 23.Rac1 Ne4 24.Be4 Be5 25.de5 de4 26.Bb2+/–) 23.Be4 de4 24.Rac1 (24.Nc6+/–) 24...Rac8 (better is 24...Be5!? 25.de5 Rec8+/–) 25.Rc8+– Rc8 (25...Bc8 26.Nc4 e5 27.d5+–) 26.Nd7 e5 27.de5 The passed pawn on e5 quickly leads to threats (27.Nb6 Re8 28.Rc1 Re6+–) 27...Rd8 (27...Rc7 28.e6 Bd5+–) 28.e6 Bc8 29.e7 Threatening mate... how? 29...Rd7 30.Ke2 Threatening mate: e8Q 30...Kf7 (30...Re7 31.Be7 Be6 32.Rh4+–) 31.Rh7 Rc7 (31...Re7 32.Be7 Be6+–) 32.Rg7! Kg7 A deflection 33.e8Q Bg4 34.Kd2 (34.f3 Rc2 35.Kd1 Rg2 36.fg4 Rg1 37.Ke2 Rg2 38.Kf1 Rc2 39.Bf8 Kg8 40.Bd6 Kh7 41.Qf7 Kh6 42.Bf8 Kg5 43.Qf4 Kh4 44.Be7 Kh3 45.Qh6 Kg4 46.Qg5 Kf3 47.Qf4) 34...Rd7 35.Kc1 Rc7 36.Kb2 Rc8 (36...Rf7+–) 37.Qe4 Bf5 38.Qe7 (38.Qe7 Kh6 39.e4+–) 1–0. Mroz,Antoni – Drygalski,Z, corr Poland, 1984.

6.Be2 Bg7

7.0–0 a6 8.a4=.

7.0–0 Nh5 8.Bg7+/– Ng7 9.Nc3 h6 10.e4 g5 11.d4 h5 12.Qd2 g4 13.Ne5 d6 14.Nd3 Qf6+/– 15.Qe3 Nd7 16.f3 gf3 17.Bf3 Qg6 18.a4 0–0–0 19.a5 Rdg8 20.Nb4 f5 21.Nc6 Bc6 22.bc6 Nf6 23.ab6 cb6 24.Ra7 Nfe8 25.Nb5 Kd8 26.Rd7 Kc8 27.Na7 Kb8 28.Rd8 Kc7 29.Rc8# 1–0. pierre – orlandobosca, internet, 2009.

7.0–0 0–0

8.c4 c5 9.a4 d5 (9...d6 A) 10.Qc2 Nbd7 (10...Qc7 11.a5 Nbd7 12.a6 Bf3 13.Bf3 d5 14.Ra4 Rad8 15.g3 Ne5; 10...a5 11.Nc3 Nbd7 12.Ng5 h6 13.Nf3 Ne5 14.Ne5 de5 15.f3 Qd6; 10...d5 11.a5 ba5 12.cd5 ed5 13.Qc5 Ne4 14.Qa3 Bb2 15.Qb2 Nd7) 11.Nc3 Qc7 12.d3 d5 13.Rfd1 Rad8 14.h3 Rfe8 15.Rd2 Nh5; B) 10.h3 Nbd7 (10...Qc7 11.a5 ba5 12.Qa4 Nbd7 13.Nc3 a6 14.Rfb1 ab5 15.Nb5 Qc6; 10...Re8 11.Qb3 Nbd7 12.d3 Qc7 13.Nbd2 a5 14.Rfe1 d5 15.Qc2 Rad8; 10...d5 11.cd5 ed5 12.d4 Nbd7 13.Nc3 Re8 14.Qb3 c4 15.Qc2 a5; 10...a5 11.d3 Nbd7 12.Qc2 Qc7 13.Nbd2 d5 14.Rfe1 Rfe8 15.Rad1 Rad8) 11.Nc3 Ne4 12.Qc2 f5 13.g3 Ne5 14.Ne5 Be5 15.Ne4 fe4; C) 10.a5 a6 (10...ba5 11.Bc3 d5 12.Qc2 Qd6 13.d3 Nbd7 14.Nbd2 a6 15.b6 Nb6) 11.ab6 Qb6 12.Nc3 Nbd7 13.Qc2 ab5 14.Nb5 Be4 15.d3 Bc6; D) 10.Nc3 Nbd7 (10...a5 11.Qc2 Nbd7 12.Ng5 h6 13.Nf3 Ne5 14.Ne5 de5 15.f3 Qd6; 10...d5 11.cd5 ed5 12.d4 Nbd7 13.Ne5 Re8 14.f4 Qc7 15.Qb3 Rac8) 11.Qc2 Qc7 12.d3 d5 13.h3 Rfe8 14.Rfe1 Rac8 15.Rad1 Red8) 10.d4 (10.Qc2 a6 (10...Nbd7 11.cd5 ed5 12.Nc3 Re8 13.d4 Rc8 14.a5 cd4 15.Nd4 Ne4; 10...Re8 11.d3 Nbd7 12.Nbd2 Qc7 13.h3 a6 14.Rfe1 Ra7 15.Bc3 Raa8; 10...Qc7 11.Be5 Qe7 12.a5 ba5 13.Nc3 Nbd7 14.Bg3 Qd8 15.d3 Nh5) 11.cd5 ed5 12.Na3 ab5 13.Nb5 Nc6 14.d3 Qe7 15.h3 Nb4; 10.cd5 ed5 (10...Nd5 11.Bg7 Kg7 12.Na3 Nd7 13.a5 Nb4 14.Qb3 Bd5 15.Nc4 Qc7) 11.Qb3 Nbd7 12.Nc3 Qc7 13.h3 c4 14.Qc2 Nc5 15.Nd4 Rfe8; 10.h3 a6 (10...Re8 11.Re1 Nbd7 12.cd5 ed5 13.d3 Bf8 14.Qb3 Bd6 15.Nbd2 a6; 10...Nbd7 11.cd5 ed5 12.Nc3 Re8 13.Re1 Qc7 14.d4 Ne4 15.Rc1 Nc3; 10...Qc7 11.a5 ba5 12.Qa4 Ne4 13.Bg7 Kg7 14.d3 Nd6 15.Nbd2 a6; 10...Ne4 11.Bg7 Kg7 12.Nc3 Nc3 13.dc3 dc4 14.Nd2 Qg5 15.Bf3 Bf3) 11.cd5 ed5 12.Na3 ab5 13.Nb5 Nc6 14.d3 Re8 15.Qb3 Qd7; 10.Qb3 Nbd7 (10...Qd6 11.Be5 Qe7 12.Nc3 Nbd7 13.cd5 Ne5 14.Ne5 Nd5 15.Nc4 Rad8; 10...Qc7 11.Nc3 Nbd7 12.cd5 ed5 13.d4 Rac8 14.h3 Rfe8 15.Qa2 Nf8; 10...dc4 11.Qc4 Nbd7 12.g3 a6 13.Na3 Nd5 14.Qb3 Bb2 15.Qb2 ab5; 10...Re8 11.d3 Nbd7 12.h3 dc4 13.dc4 Ne4 14.Bg7 Kg7 15.Nc3 Nc3) 11.cd5 ed5 12.Nc3 Re8 13.Rfe1 Qc7 14.h3 c4 15.Qc2 Nc5) 10...Nbd7 (10...cd4 11.Bd4 Nbd7 12.Nbd2 Rc8 13.Qc2 Ne4 14.Bg7 Kg7 15.a5 Qf6) 11.Nbd2 cd4 (11...Qc7 12.a5 ba5 13.Qa4 a6 14.ba6 Ba6 15.Qa5 Qb7) 12.Bd4 Rc8 13.a5 (13.Qc2 Qe7 14.a5 dc4 15.Nc4 e5) 13...Nc5 (13...ba5 14.Bd3= (14.Ba7 Ne4 15.Bd4 Bd4) 14...Ng4 15.Be2 dc4; 13...Qc7 14.Qb1 e5 15.Bc3 dc4) 14.ab6+= ab6 15.Ra7 (15.Qc2 Nfe4) 15...Nfd7 (15...Qc7=) 16.Qa1 f6 17.Rd1 e5 (17...Rc7 18.Qa2+=) 18.Bb2 ½–½. Langschmidt,Dirk (2100) – Maier,Ralf (1995), RSX20E – NoEngine–Grossturnier–1, 2010. (=1.Nf3 Nf6 2.b4 e6 3.b5 b6 4.Bb2 Bb7 5.e3 g6 6.Be2 Bg7 7.0–0 0–0)

8.c4 d5 9.cd5 Nd5 10.Bg7 Kg7 11.Nc3 c6 (11...Nc3 12.dc3 a6 13.a4=) 12.Nd5 (12.Rc1 c5+=) 12...Qd5= 13.Qb3. Hingst,Thomas (2095) – Deicke,Detlef (1925), remoteschach.de, 2009.

8.c4 d6 9.Nc3 Nbd7 10.d4 e5 11.Qc2 Re8 12.Rfe1 Qe7 13.h3 e4 14.Nd2 d5 15.a4 c6 16.a5 cb5 17.a6 Bc8 18.cd5 b4 19.Nb5 Nd5 20.Qc6 (20.Qc6 Ba6 21.Ra6+–) 1–0. pcmvr (2870) – gtan (2445), net–chess.com, 2009.

8.c4 d6 9.d4 Nbd7 (9...a6 10.Nc3=) 10.Nbd2 (10.Nc3 a6+=) 10...h6 (10...c5 11.Rb1=) 11.Nb3 (11.Bd3 a6+=) 11...Nh7 (11...a6 12.a4=) 12.Rc1 (12.Bd3 Ng5 13.Nfd2 f5+=) 12...f5 13.Qd2 (13.Re1 a6 14.a3 Nhf6=) 13...Ndf6 (13...Ng5 14.Ng5 Qg5 15.f3=) 14.Qb4 (14.c5 Ne4 15.Qc2 Bd5+=) 14...a5 (14...a6 15.a4+=) 15.ba6 (15.Qa4 Ne4+=) 15...Ba6 16.a3 c5 17.Qe1 g5 (17...Ne4 18.Rb1=) 18.Rd1 (18.Rb1 Bb7+=) 18...Qc7= 19.Nfd2 g4 (19...d5 20.f4=) 20.Bd3 (20.f3 d5+=) 20...Bb7 (20...Ng5 21.Qe2=) 21.d5 (21.e4 fe4 22.Ne4 Ne4 23.Be4 Ng5 24.Bb7 Qb7+=) 21...Qd7 (21...ed5 22.Bf5 Ng5 23.Qe2+=) 22.de6 Qe6 23.Nc1 (23.Rb1 Be4 24.Qe2 d5=) 23...Nh5 (23...Ne4 24.Bg7 Kg7 25.Ne2=) 24.Bg7 Ng7 25.Nb1 Qf6 (25...d5 26.Qc3=) 26.Ne2 Ne6 (26...Ng5 27.h4 gh3 28.f3–+) 27.Ng3 Ng7 28.Bc2 (28.Qd2 Ng5 29.Be2 Rfd8+=) 28...h5 29.Ne2 h4 30.Nf4 h3 31.Qd2 Exerts pressure on the backward pawn (31.Nd5!? Qb2 32.Rd2 hg2 33.Kg2+=) 31...hg2+= 32.Ng2 Bf3 33.Rde1 (33.Rc1 Ng5–/+) 33...Ng5 34.Rc1 Qh6 35.Bd1 Kh8 (35...Kf7 36.Re1 Rh8–+) 36.Kh1?? (better is 36.Qc2!?–/+) 36...Rf6 (36...Bg2 37.Kg2 Qh3 38.Kg1 Nf3 39.Bf3 gf3 40.Qd6 Qg2) 37.e4–+ fe4 (better is 37...Qh3 38.Bf3 Nf3 39.Qf4–+) 38.Qd5?? (38.Rg1–+) 38...Raf8 (38...g3 39.Qa8 Kh7 40.Qe4 Be4 41.Bh5 Bg2 42.Kg2 Qh5 43.fg3 Qe2 44.Rf2 Rf2 45.Kg1 Nf3 46.Kh1 Rh2) 39.Nd2 (39.Bf3 Nf3 40.Qd6 Rd6 41.Nh4 Qh4 42.Rfd1 Qh2) 39...Bg2 40.Kg2 Qh3 41.Kg1 Nf3 (better is 41...Rh6 42.Qd6 Rd6–+) 42.Bf3 gf3 (42...ef3 43.Nf3 gf3 44.Qg5 Ne6 45.Rc3 Ng5 46.Rf3 Nf3 47.Kh1 Qf1) 43.Qg5 If White now only could play Kh1... 43...Ne6 (43...Ne6 44.Kh1 Ng5–+) 0–1. Cagara,Paulina – Szewczuk,Mariola, POL–ch U18 Girls Zakopane, 2001.

8.d3 d6 9.Nbd2 a6 10.a4 ab5 11.ab5 Nbd7 12.c4 e5 13.Qc2 Qe7 Black plans e4 14.d4 e4 15.Ng5 h6 16.Nh3 Nh7 (16...g5 17.Bc3=) 17.Nf4+= Ng5? (better is 17...Nhf6+=) 18.Nd5+– Bd5 19.cd5 Ra1 20.Ra1 Rc8 21.h4 Nh7 22.Qe4 Qe4 23.Ne4 f5 24.Nd2 (24.Nc3 Nhf6+–) 24...Nhf6 25.Bf3 g5 26.hg5 hg5 27.g3 g4 28.Bg2 Nf8 29.Ra7 Bh6 30.Nc4 (30.Kf1!? N8h7+–) 30...Ng6+/– 31.Kf1 Kf8 (31...Bf8 32.Ke1+/–) 32.Ba3+– Ne7? (better is 32...Bg5+–) 33.Ke2 (better is 33.Nd6 cd6 34.Bd6 Rc1 35.Ke2 Rc2 36.Ke1 Rc1 37.Kd2+–) 33...Ke8 (better is 33...Ned5!? 34.Ke1 Ne4+=) 34.Bd6!+– Ned5 (34...cd6 35.Nd6 Double attack) 35.Be5 Ne4 36.Be4 fe4 37.Kd2 Kd7? (better is 37...Bf8+/–) 38.Nd6+– (38.Nd6 Rg8 39.Ne4+–) 1–0. Melderis,Uldis (2000) – Eigminas,Kipras (1635), Palanga LTU, Baltija Cup, 2012.

8.d4 c5 9.dc5 bc5= 10.a4 d5 11.Nbd2 Qc7 12.c4 Nbd7= 13.a5 Ng4 14.Bg7+/– Kg7 15.a6 (15.a6 Bc8 16.Qb3+=) 1–0. pcmvr (2100) – tbrannon (2030), net–chess.com, 2006.

8.d4 d6 9.Nbd2 Nbd7 10.c4 h6 11.a4 (11.Bd3 c5+=) 11...Nh7 (11...c5!?=) 12.a5+/– a6 13.Nb3 (13.ab6 c5+/–) 13...Nb8 (13...Ng5 14.ab6 Nb6 15.c5 Bf3 16.cb6 (worse is 16.Bf3 Nf3 17.Qf3 Nc4=) 16...Be2 17.Qe2 ab5 18.Ra8 Qa8 19.bc7+=) 14.Nfd2 ab5 15.cb5 ba5 (15...Qg5 16.e4 f5 17.f4+/–) 16.Na5 Qc8 (16...Ra7 17.Qc2+/–) 17.Qb3 (17.Qc2 Rd8+/–) 17...Nd7 (17...Bd5 18.Qc2 f5 19.Rfc1+/–) 18.Rfc1 Ra7 (18...e5 19.Qc4 ed4 20.Bd4+– (20.Qc7?! de3 21.Qd6 Bb2 22.Rc8 Bc8=; 20.Nb7?! de3 21.Ra8 Qa8 22.Bg7 Kg7 23.Qd4 Ndf6 24.Rc7 ed2 25.Qd2 d5+=)) 19.Nc6 (better is 19.Qc2+–) 19...Bc6? (better is 19...Ra1 20.Ne7 Kh8 21.Nc8 Rc1 22.Bc1 Rc8+–) 20.Ra7 (20.bc6?! Ra1 21.Ra1 Nb6+/–; 20.Rc6?! Ra1 21.Ba1 Nhf6+/–) 20...Bd5 (20...Bb7+–) 21.Qc2 (21.Rcc7?! Bb3 22.Rc8 Rc8 23.Nb3 Rc2+/–; 21.Rac7?! Qc7 22.Rc7 Bb3 23.Nb3 Ndf6+–) 21...c6 (21...Ndf6 22.Qc7 Qc7 23.Rcc7+–) 22.bc6 Ndf6 (22...Nb8 23.Bb5+–) 23.Qa4 (23.e4 Bc6 24.Qc6 Qc6 25.Rc6 Rb8+–) 23...Ng5 24.f3 (24.c7 e5 25.de5 Nfe4 26.Ne4 Ne4+–) 24...Ne8 (24...Qb8 25.Ba3 Qc8 26.Bd6+–) 25.e4 Bc6 26.Qc6 Qb8 27.Rb7 Qd8 28.Ra1 (28.f4 Nh7+–) 28...Qf6 (28...Nh3 29.gh3 Qg5 30.Kf1 Qd2 31.Ra8 Bd4 32.Bd4 Qd4 33.Re8+–) 29.d5 (29.Nc4 d5 30.ed5 ed5 31.Qd5 Ne6+–) 29...Qf4 30.Nf1 (30.Bg7!? Qe3 31.Kf1 Kg7+–) 30...Bb2 31.Rb2 Qe5 (31...Nf6 32.Ra8 Ra8 33.Qa8 Kg7 34.Qc8+–) 32.Qb6 (32.Rab1 Nf6 33.Ne3 Kg7+–) 32...ed5 33.Ra5 Nf6 34.Bc4! Nd7 (34...dc4 35.Qb5 Double attack (35.Re5 Pinning; 35.Re5 Deflection; 35.Qb5 Decoy)) 35.Qb4 (better is 35.Qf2 Qc3 36.Ra7 Qc4 37.Rd7 de4 38.h4+– (worse is 38.Rd6 ef3 39.Ne3 Qc3+–)) 35...Qd4 36.Kh1 (better is 36.Rf2 dc4 37.Rd5+–) 36...dc4? (better is 36...Qc4!? 37.Qc4 dc4+/–) 37.Rd5 (better is 37.Rd2!? Qb6 38.Qb6 Nb6 39.Rd6 Nc8+–) 37...Qg7 38.Rbd2 (38.Rd6?! Rb8 39.Qc4 Qb2 40.Rd7 Qf2+/–) 38...Rb8 (38...Ne5 39.Rd6 Ra8 40.Rd8 Rd8 41.Rd8 Kh7 42.Ra8+–) 39.Qc4 Kh7 (39...Rb1 40.Qd3 Rc1+–) 40.Rg5! hg5 41.Rd6 Nb6? (41...Ne5 42.Qc1+–) 42.Qd4 (better is 42.Qc7 Qa1 43.Qf7 Kh8 44.Kg1+–) 42...Qd4+/– 43.Rd4 Rc8 (43...Ra8 44.Kg1+–) 44.h3 (44.Kg1 Rc3+–) 44...Rc1+/– 45.Kg1 1–0. jaddwarrior (1920) – schreibe (1760), ChessWorld.net, 2013.

5.Nf3 h6

6.c4 a6 7.a4 a5 8.Be2+= c6 9.0–0 d5 (9...Bb4 10.Nc3+=) 10.Nc3 (better is 10.cd5 cd5 11.d4+=) 10...g5 (better is 10...dc4!? 11.Bc4 Bd6+=) 11.bc6+– Bc6 12.cd5 Bd5 (12...ed5!? 13.Rc1 Bc5+–) 13.Nd5 Qd5?? (13...ed5 14.Bb5 Nbd7+–) 14.Bf6 Rh7 (14...Rg8 15.Bb5 Nc6 16.Ne5+–) 15.Bb5 Nd7 16.Ne5 (better is 16.Qc2 Bg7 17.Bd7 Qd7+–) 16...Bg7 (16...Qb5 17.ab5 Nf6 18.Qc2+–) 17.Nd7 Bf6 18.Nf6 (18.Nf6 Ke7 19.Nd5 ed5 20.Qc2+–) 1–0. DEFFM – GuestLBJK, freechess.org, 2018.

6.Be2 d5 7.c4 (7.0–0 a6=) 7...dc4 8.0–0 (8.Bc4 a6=) 8...Be7 (8...Bd5 9.Nc3=) 9.Bc4 0–0 10.d4 Bd5 (10...a6 11.a4=) 11.Qc2 (11.Bd5 ed5 12.Qa4 a6=) 11...Bc4 (11...Bf3 12.gf3 a6 13.Qa4=) 12.Qc4+= Nd5 (12...a6 13.a4+=) 13.e4 Nf4 14.Nc3 (14.g3 Ng6+=) 14...Nd7 (14...a6 15.a4+=) 15.a4 (15.Rad1 a6+=) 15...Nf6 (15...Bd6 16.e5 Be7 17.Rad1+/–) 16.Ne5 Bd6? (better is 16...a6+/–) 17.Nc6+– Qe7?? (17...Qd7 18.e5 N6d5 19.ed6 Nc3 20.Bc3 cd6+–) 18.e5 (better is 18.Ne7 Be7 19.Qc7+–) 18...Qd7 19.ef6 (19.ed6?! cd6 20.a5 Rfc8+–) 19...gf6 20.g3 (20.Bc1 Kg7+–) 20...Nd5 (20...Ng6 21.d5 Kg7 22.Qg4+–) 21.Nd5 ed5 22.Qd5 Qe6 (22...a6 23.Qh5+–) 23.Qh5 (23.Qf3 f5+–) 23...f5 24.d5! Qg6 (24...Qd5 25.Qh6 Deflection) 25.Qh4 (25.Qf3 a6+–) 25...Rae8 (25...a6 26.Qd4 Kh7 27.Ne5 Be5 28.Qe5+–) 26.Rfe1 Re1 (26...f4 27.Qf6 Kh7 28.Kg2+–) 27.Re1 f4 28.Bf6 (28.Na7 Ra8+–) 28...fg3 29.hg3 Bc5 (29...Kh7+–) 30.Ne5 Qf5 31.Ng4 Bb4 (31...Bf2 32.Nf2 Kh7+–) 32.Nh6 (32.Nh6 Kh7 33.Nf5 Kg6 34.Qg5 Kh7 35.Qg7) 1–0. DEFFM – zetcee, freechess.org, 2018.

5.f4 a6

6.a4 Bb4 7.Nf3 (7.Bc3 Nd5 A) 8.Qf3 Bc3 9.Nc3 ab5 10.Bb5 c6 11.Bd3 Nc3–/+; B) 8.Nf3 Nc3 (8...ab5 9.Bb4 Nb4 10.c3 Nd5 11.Bb5 0–0+=; 8...Bc3 9.Nc3 Nc3 10.dc3 ab5 11.ab5 Bf3+=) 9.Nc3 Qf6 10.Na2 Bf3 11.gf3 Ba3–/+; C) 8.Bb4 Nb4 9.Na3 Qh4 10.Ke2 Qf6 11.Rb1 Qe7–/+; D) 8.ba6 Na6 9.Qg4 Bc3 10.Nc3 Qf6 11.Ba6 Ba6+=; E) 8.Qg4 Bc3 9.Nc3 Qf6 10.Ra3 ab5 11.Nb5 0–0+=; 7.Nc3 0–0 8.Nf3 Ne4 9.Ne4 Be4 10.Be2 d5 11.0–0 c5=) 7...0–0 (7...Nd5 A) 8.Qe2 ab5 (8...0–0 9.Qd3 Bc5 10.c4 Nb4 11.Qc3 f6=) 9.ab5 Ra1 10.Ba1 0–0 11.c4 Nf6=; B) 8.c3 Be7 9.c4 Nf6 10.Be2 0–0 11.0–0 d5=; 7...ab5 A) 8.Bb5 Nc6 (8...0–0 9.0–0 Nc6 10.Ne5 Ra7 11.Ng4 Be7+=; 8...Ra5 9.0–0 0–0 10.Ne5 Nc6 11.Qf3 Nd5=; 8...Na6 9.0–0 0–0 10.Ne5 c6 11.Be2 d6+=) 9.0–0 0–0 10.Ne5 Na5 11.f5 Be7+=; B) 8.ab5 Ra1 9.Ba1 Nd5 10.Bg7 Ne3 11.Qe2 Rg8=) 8.c4 (8.Be2 d6 (8...c5= 9.0–0 d6 10.Nc3 Qe7 11.Rb1 Rd8=; 8...Nd5 9.0–0 Bc5 10.Nd4 ab5 11.ab5 Ra1=; 8...Bc5 9.0–0 Nd5 10.Nd4 Bd4 11.Bd4 c5=; 8...c6 9.0–0 d6 10.Nc3 Qe7 11.Qe1 Rc8=; 8...d5 9.0–0 c5 10.Ne5 Qe7 11.Qe1 c4=; 8...Ne4 9.0–0 Re8 10.c4 d5 11.d3 Nd6=) 9.0–0 c5 10.bc6 Nc6 11.c3 Ba5=; 8.Bd3 c5 (8...Ne4 9.0–0 Re8 10.Ne5 f6 11.Nf3 Qe7=; 8...Qe7 9.0–0 Ne4 10.Be2 Nd6 11.Nc3 f6=; 8...d6 9.0–0 Nbd7 10.Nc3 Nc5 11.Bc4 Nfe4=; 8...c6 9.0–0 d6 10.Ng5 h6 11.Ne4 Nbd7=; 8...d5 9.0–0 c5 10.Bc3 Bc3 11.Nc3 Qd6=) 9.0–0 d5 10.Be2 Ne4 11.c3 Ba5+=) 8...Ne4 (8...c5 9.Be2+= d5 10.0–0 dc4 11.Bc4 ab5+=; 8...d5 9.Nc3 c5 10.bc6 Nc6 11.cd5 Nd5+=; 8...c6 9.Be2 d5 10.0–0 dc4 11.Bc4 Ne4+=) 9.Be2 d5 10.0–0 (10.cd5 Bd5 11.0–0 ab5=) 10...dc4 11.Bc4 c6 (11...ab5=) 12.d3 (12.Qc2 ab5 13.Bd3 Nf6=) 12...Nd6+= 13.Nc3 cb5 14.ab5 Nc4 15.dc4 a5 (15...Qe7!?=) 16.Na4+= Nd7 17.Qd4 (17.Ne5 Nc5+=) 17...f6= 18.Ba3 ½–½. Bohus,Aladar – Gajdusek, Kubin op, 1978.

6.a4 Bd6 7.Nf3 0–0 8.Be2 ab5 9.ab5 Ra1 10.Ba1 c5 11.c4 Qe7 12.0–0+= Be4 13.d3 Bg6 14.Nbd2?? Ng4–/+ 15.Qb3 Ne3–+ 16.Rf2 Bf4 17.h3? Bg3 (17...Bg3 18.Be5 Bf2 19.Kf2 Nf5–+) 0–1. hal1958 – trousersnake, playchess.de, 2002.

6.a4 Be7 7.Nf3 0–0 8.Bd3 (8.Be2 A) 8...Nd5 9.0–0 Bf6 (9...Bc5 10.Nd4 Qh4 11.Bf3 Ra7 12.Na3 Re8+=) 10.Bf6 Nf6 11.Nc3 ab5 12.ab5 Ra1=; B) 8...Bc5 B1) 9.Nc3 d6 (9...Qe7 10.0–0 d6 11.Qe1 Bb4 12.Qg3 c5=; 9...Ra7 10.0–0 c6 11.Qe1 Qc7 12.Ne5 d5=) 10.0–0 c6 11.Qe1 Nbd7 12.bc6 Bc6=; B2) 9.0–0 ab5 (9...Nd5 10.Nd4 Qh4 11.Bf3 Ra7 12.Na3 Nf6+=) 10.ab5 Ra1 11.Ba1 Qe7 12.Nc3 d6=; C) 8...Ne4 9.0–0 Bf6 10.d4 c5 11.Nbd2 d6 12.c4 Nd7=) 8...c5 (8...d5 9.0–0 (9.Nc3 c5 10.0–0 c4 11.Be2 Bc5 12.Qe1 Nbd7=) 9...c5 10.Nc3 c4 11.Be2 Bc5 12.Qe1 Re8=) 9.0–0 (9.Nc3 d6 (9...d5 10.0–0 d4 11.ed4 cd4 12.Ne2 Bf3=) 10.0–0 d5 11.Ne5 c4 12.Be2 Nbd7=) 9...d5 (9...d6 10.Nc3 d5 11.Ne5 c4 12.Be2 Nbd7=) 10.Nc3 (10.Be2 Nfd7 11.Nc3 d4 12.Na2 de3=) 10...ab5 (10...d4 11.ed4 cd4 12.Ne2 Bf3=) 11.ab5 (11.Nb5 Na6 12.Be2 c4=) 11...Ra1 12.Qa1 Qc7 (12...Nbd7=) 13.Qe1 Nbd7 14.Qh4 Re8 15.Qg3 d4 16.ed4 c4 17.Be2 Nh5 18.Qe1 Nf4 (worse is 18...Qf4 19.Qf2=) 19.Nd1 Ra8 20.Bc3 Ra4 21.Qf2 f6 22.Ne1 Bd6 23.Bf3 Nd5 24.g3 Nf8 25.Ng2 Bc8 (25...Qd7 26.Nge3 Ne3 27.Ne3 Bf3 28.Qf3 Qb5 29.Qg4–/+) 26.Nde3 Ne3 27.Ne3 Bd7 28.Rb1 Ng6 29.Qf1 f5 30.Nd1 f4 31.Nb2 Ra2 32.Nc4 fg3 (worse is 32...Rc2 33.Be4 Ra2 34.Nd6 Qd6 35.Bg6 hg6 36.Qf4 Qf4 37.gf4+/–) 33.Be4 gh2 34.Kh1 Bf4 35.Ne5 Be5 (35...Ne5?? 36.Qf4 Be8 37.Bb4+–) 36.de5 Ra4 (36...Ne5?? 37.Qf4+–) 37.Qf3 Qc4 38.Re1 Bb5 39.Kh2 Ne7 40.Qg4 Bc6 41.Rg1 g6 42.d3 Qa2 (42...Qc3?! 43.Qe6 Kf8 44.Qf6 Kg8 45.Qe6 Kh8 46.Qe7 Qd2 47.Kh3 Qe3 48.Rg3 Qh6 49.Kg4 Qh5 50.Kf4 Qh6 51.Kf3 Be4 52.de4=) 43.Rg2 Be4 44.de4 Kg7 45.Qf3 Ng8 46.Rd2 Ra7 47.Bd4 Rf7 48.Qd3 Qa7 49.Qh3 Qe7 50.Be3 b5 51.c3 b4 52.cb4 Qb4 53.Qe6 Qe4 54.Rd7 Ne7 55.Bd4 Qe2 56.Kh1 h5 57.Bg1 Qe4 (57...Qf3 58.Kh2–/+) 58.Kh2 Qf4 59.Kh1 Kh6 60.Rd2 Rf5 (60...Qd2 61.Qf7 Qd5 62.Qd5 Nd5 63.Bc5–+) 61.Qd6 Re5 62.Qd4 0–1. Buczinski,Henryk – Woelfelschneider,Peter, corr TT–19, 2006.

6.a4 Be7 7.Nf3 c5 8.Be2 ab5 9.ab5 Ra1 10.Ba1 d5 11.0–0 0–0 12.Qe1 Nbd7 13.Bb2 Qc7 14.Qh4 Ra8 15.Nc3 d4 16.ed4 cd4 17.Nd4 Bc5 18.Qf2 Qd8 19.Nd1 Ra2 20.c3 Ne4 21.Qe1 Ndf6 22.Kh1 Bd4 23.cd4 Nd6 24.d5 Nd5 25.Bd3 Qd7 26.Qg3 f6 27.Re1 Nf5 28.Bf5 ef5 29.Qb3 Ra8 30.Kg1 h6 31.Nc3 Rc8 32.Ba3 Kh7=+ 33.Nd5 Bd5 34.Qd3 Re8 35.Re8 Qe8 36.Qf5 g6 37.Qb1 Qe2 38.Qf1 Qd2 39.Bc1 Qd4 40.Kh1 Qc3 41.h4 Kg7 42.Kh2 Qc5 43.Bb2 Qb4 44.Bc1 Qb1 45.Kg1 Qe4 46.Qf2 Qc4 47.Be3 Qb5 48.Bb6 Qb1 49.Kh2 Qe4 50.Be3 Kf7 51.Qg3 h5 52.Qh3 Be6 53.Qg3 Qc4 54.Bb6 Bd7 55.Qe3 Bc6 56.Bc5 Qe6 57.f5 Qe5 58.Qe5 fe5 59.fg6 Kg6 60.Bd6 e4 61.Kg1 e3 62.Kf1 Bb5–/+ 63.Ke1 Kf5 64.g3 Kg4 65.Bc7 Bd3 66.Be5 Kf3 ½–½. mrkt – rompepelotas, ChessWorld.net, 2004.

6.c4 ab5 7.cb5 Bb4 8.Nf3 0–0 9.Be2 Ne4 10.0–0 d5 11.a4 Nd7 12.d3 Nef6 13.d4 Ne4 14.Ne5 Ne5 15.fe5 Qh4 16.Bf3 f5 17.Ba3 Ba3 18.Na3 Qg5 19.Qe2 Ra4 20.Nc2 Rfa8 21.Be4 de4 22.Rac1 Ra2 23.Qc4 Bd5 24.Qc7 h5 25.Qb6 h4 26.Qc5 h3 27.Rf2 Bb7 28.b6 Rc8 29.Qd6?? Rac2?? 30.Qe6 Kh7 31.Rcc2 Rc2 32.Rc2 Qe3 33.Rf2 g6?? 34.Qf7 Kh6 35.Qb7 hg2?? 36.Kg2 Qd4?? 37.Qc6+– e3 38.Re2 Qg4 39.Kf1 Qh3 40.Qg2 Qh5 41.b7 f4 42.Re3! fe3 43.Qe2 Qh3?? 44.Ke1 Qh4= 45.Kd1 Qd8? 46.Kc2+– Kg7 47.Kc3 Qc7 48.Kd4 Qd7 49.Ke3 Qb7 50.Kf2 Qb6 51.Qe3 Qc6 52.Qf3 Qc5= 53.Qe3 Qd5 54.Ke2 Qe6 55.Qd3?? Kg8?? 56.Kd2 Qf5?? 57.Qe3 Kg7 58.Qd3 Qg5 (58...Qg5 59.Kc3 Qe5 60.Qd4 Kf6=) 0–1. elsh1403 – uzi26ma2 (1645), kurnik, 2011.

6.c4 d5 7.Nf3 (7.cd5 Bd5 (7...Nd5 8.Nf3 ab5 9.Bb5 c6 10.Be2 Ba6+=) 8.ba6 Ne4 9.Nf3 Na6 10.a3 Nac5+=) 7...dc4 (7...Be7 8.Qc2 dc4 9.Bc4 c6 10.a4 0–0=; 7...c6 8.cd5 Nd5 9.bc6 Nc6 10.Nc3 Rc8+=; 7...ab5 8.cb5 Bd6 9.Qc2 0–0 10.Ng5 Nbd7=) 8.Bc4 ab5 (8...Be7 9.0–0 0–0 10.d3 ab5+=) 9.Bb5 c6 10.Bc4 (10.Be2 Bd6=) 10...Bd6 (10...Ba6+=) 11.0–0 Nbd7 12.a4 (12.Ne5 0–0=) 12...0–0 13.Qe2 Ra5 14.d4 Qa8 (14...Qc7 15.Bc3 Ra7 16.Ne5+=) 15.Nc3= Nd5 16.Ne5 Qd8 (16...Be5 17.fe5 Ba6 18.Nd5 ed5 19.Ba6 Ra6 20.Qg4=) 17.e4 b5? (better is 17...Nc7=) 18.ed5+– Be5 19.fe5 bc4 20.de6 fe6 21.Qc4 Re8 22.Qb3 (22.Qb4 Ba6 23.Rfd1 Qc7+–) 22...Ba6+/– 23.Rf3 (23.Rfd1 Qb8 24.Qb8 Rb8+/– (24...Nb8? 25.Ba3+–)) 23...Nb6? (better is 23...c5!? 24.Nb5 Bb5 25.ab5 Ra1 26.Ba1 Qb6+/–) 24.Ne4+– Nc4 25.Bc3 Rd5 26.Re1 (26.Rg3 Kh8 27.Qc2 Re7+–) 26...Qh4? (better is 26...Rd4 27.Nd6 Rd6 28.ed6 Qd6+/–) 27.Nc5+– Ne5 (27...Rc5 28.dc5 Qe7 29.Qb4+–) 28.Re5 (28.Na6?? Nf3 29.Kf1 Ne1–+; 28.de5?! Rc5 29.Rh3 Qc4+=) 28...Re5 29.de5 (29.Na6?! Rh5 30.h3 Qe7+–) 29...Bc4 (29...Be2 30.Rf2 Bc4 31.Qb4+–) 30.Qc2 (30.Qb4 Rd8 31.h3 g6+–) 30...Rf8 (30...Rd8 31.a5 Qe7 32.Bb4+–) 31.Rf8 Kf8 32.Qf2 Qf2 33.Kf2 Ke7 (33...h5 34.a5+–) 34.Ke3 (34.Ke3 Kd8 35.a5+–) 1–0. Schoppmeyer,Herbert – Oestreich,Reinhard, OWL–ch Rheda, 1961.

6.Nf3 ab5 7.Bb5 c6 8.Be2 d5 9.0–0 Bd6 10.Ne5 Nbd7 11.d4 Qc7 12.Nd2 c5 13.c4 0–0 14.Qe1 Ne4 15.Ne4= de4 16.Bg4 f5 17.Be2= Ne5 18.de5 Be7 19.a4 ½–½. ookii (1760) – thotares (1670), internet, 2007.

6.Nf3 Be7+=.

6.a4 ab5 7.ab5 Ra1

8.Ba1 Bb4 9.Nf3=.

8.Ba1 c5 9.Nf3 d5 10.c4 Nbd7 11.cd5 ed5 12.Bd3 Bd6 13.0–0 0–0 14.Ne5 d4 15.Nc6 Qa8 16.Bb2 Nb8 17.e4 Nc6 18.bc6 Bc6 19.e5 Bg2 20.Rf2 Be4 21.Bc4 b5 22.Bf1 Be5 23.fe5=+ Nd7 24.Bb5 Ne5 25.d3 Bc6 26.Na3 Bb5–+ 27.Nb5 Qa6 28.Nd4 cd4 29.Bd4 Qd3 30.Qd3 Nd3 31.Rf3 Nb4 32.Bc5 Rb8 33.Rb3 Na6 (34.Rb8 Nb8–+) 0–1. Jeroen – Whatever, playchess.de, 2003.

8.Ba1 d6 9.Nf3 Nbd7 10.c4 (10.Nc3 Be7=) 10...Be7 11.Nc3 0–0 12.Be2 Nc5 13.0–0 Qd7 14.d4 Nce4 15.Qc2 Nc3 16.Bc3 Ne4 17.Bd3 f5 18.Ra1 Nc3 19.Qc3 Bf6 20.Be2 Ra8 21.Ra8 Ba8 22.Nd2 Be7 23.Qa3 Bb7 24.Qa7 Bc8 (24...Qc8 25.Kf2=) 25.Bf3 Qd8 26.Kf2 Bd7 27.g3 Kf7 28.Bb7 g6 ½–½. Recasens Sanchez,Juan Antonio (2120) – Kratochvil,Jan (2005), WS/H/148 ICCF, 2008.

8.Ba1 d6 9.Nf3 Nbd7 (9...Be7 10.Be2=) 10.Be2 Qa8 (10...Be7 11.0–0=) 11.Bb2 Be7 12.0–0 0–0 13.c4 Rd8 (13...c6 14.bc6 Bc6 15.Qc2=) 14.Qc2 c5 (14...d5 15.cd5 Nd5 16.f5=) 15.bc6 (15.Nc3 d5=) 15...Bc6= 16.Nc3 Rc8 (16...d5 17.Ra1 Qc8 18.cd5 Nd5 19.Nd4+=) 17.Qb1 (17.f5 e5+=) 17...Bb7 (17...d5 18.cd5 Nd5 19.Nd5 Bd5 20.Bd3=) 18.Nb5 (18.f5 e5=) 18...d5 19.cd5 Bd5 20.Bd4 Qa2 (20...Bc5 21.Rc1=) 21.Nc3 Exerts pressure on the isolated pawn 21...Qb1 22.Rb1 Bc5 23.Nd5 Nd5 24.g3 (24.Bb2 Kf8=) 24...Bd4 25.Nd4 g6 (25...Ra8 26.Bc4=) 26.Kf2 Ra8 (26...h6 27.e4 N5f6 28.Bf3+=) 27.Bf3 Ra2 28.Bd5 ed5 29.Ke2 h5 (29...Kg7 30.g4+=) 30.Rb5+= Ra5 31.Ra5 ba5 32.Nc6 Kf8 (32...a4!? 33.Ne7 Kf8 34.Nd5 a3+=) 33.Na5+/– Ke7 34.Nb7 (34.Nc6 Kd6 35.Nd4 Kc5+/–) 34...Nf6 (34...f6 35.Kd3+/–) 35.d3 Kd7 (35...Nd7 36.h3+/–) 36.h3+– Kc7 (36...Ne8 37.e4+–) 37.Nc5 Kc6 38.Nb3 (38.d4 Ne8+–) 38...Kd6+/– 39.Nd4 Nd7 40.Nf3 (40.e4 f6+/–) 40...Nf8 (40...f6 41.Nd4+/–) 41.Ng5 (41.e4 de4 42.de4 f6+–) 41...f6+/– 42.Nf3 Kc5 (42...Ne6 43.e4+/–) 43.Nd4 (43.g4 hg4 44.hg4 Ne6+–) 43...Kd6+/– 44.Kd2 Nd7 45.Kc3 Nc5 46.Nf3 Na4 (46...Ne6 47.g4+/–) 47.Kd4+– Nc5 48.Nh4 (48.e4 Ne6 49.Ke3 de4 50.de4 g5+–) 48...Ne6+/– 49.Kc3 Nf8 50.Kb4 (50.e4 de4 51.de4 Kc5+/–) 50...Kc6 51.d4 (51.e4 Kd6+/–) 51...Kd6 (51...g5 52.Nf5+/–) 52.Kb5 f5 53.Ka6 (53.Kb4+/–) 53...Nd7 (better is 53...Ke6!?+/–) 54.Ng6+– Nf6 55.Nh4 Ke6 56.Nf3 Kd6 57.Ng5 Kc6 58.Ka5 Nd7? (58...Kd7+–) 59.Kb4 (59.Kb4 Nf6 60.Kc3+–; better is 59.Nf7 Nb6 60.Nd6 Nd7 61.Nf5 Nf6+–) 1–0. Vokac,Marek (2470) – Tratar,Marko (2420), Ceske Budejovice op, 1996.

8.Ba1 Be7 9.Nf3 0–0 10.Be2 (10.Bd3 c5 (10...d6 11.0–0 Nbd7 12.Bd4 Nc5 13.Nc3 Qd7 14.Qe1 Ra8) 11.0–0 d5 12.c4 Nbd7 13.Nc3 Qc7 14.Bb2 Ra8; 10.Nc3 c5 (10...d5 11.Bd3 Nbd7 12.0–0 Nc5 13.Bb2 Qd6 14.Ba3 Ra8; 10...d6 11.Bc4 d5 12.Bd3 Nbd7 13.0–0 Nc5 14.Bb2 Qd6; 10...h6 11.Bd3 d6 12.0–0 Nbd7 13.Bb2 Nc5 14.Qe2 Qd7) 11.Be2 d5 12.0–0 Nbd7 13.Na4 Qc7 14.c4 Ra8; 10.Bb2 d5 (10...d6 11.Nc3 Nbd7 12.Be2 Nc5 13.0–0 Qd7 14.Nd4 Ra8; 10...c5 11.Bd3 d5 12.c4 h6 13.0–0 Nbd7 14.Nc3 Qc7; 10...g6 11.Nc3 d5 12.Be2 Nbd7 13.0–0 Nc5 14.d4 Nce4; 10...h6 11.Be2 d6 12.Nc3 Nbd7 13.0–0 Nc5 14.d4 Nce4) 11.Be2 Nbd7 12.0–0 Nc5 13.Nc3 Qd6 14.d3 Ng4) 10...d6 (10...c5 11.c4 d5 12.0–0 Nbd7 13.Nc3 Qc7 14.Bb2 Ra8; 10...d5 11.0–0 c5 12.bc6 Nc6 13.Bb2 Qd6 14.Ba3 Qc7) 11.0–0 c5 (11...Nbd7 12.Nc3 Nc5 13.Nd4 Qd7 14.Bf3 d5) 12.c4 (12.bc6 Nc6 13.Nc3 Qc7 14.Nb5 Qd7) 12...d5 (12...Qc7 13.Nc3 Nbd7 14.Qc2 Ra8) 13.Ne5 (13.Bb2 Nbd7 14.Nc3 Qc7) 13...Nfd7 (13...Qc7 14.cd5 ed5) 14.Bf3 (14.Nf3 Nf6) 14...f6 (14...Ne5 15.Be5 Nd7 16.Bc3=) 15.Nd7 (15.Ng4 Qc7=) 15...Nd7 (15...Qd7 16.Qe2=) 16.Qb3 (16.Nc3 Qa8+=) 16...Nb8 (16...Qc7!?+=) 17.Nc3+/– d4 (better is 17...dc4!? 18.Qc4 Bc8+/–) 18.Bb7+– dc3 19.Qc3 (19.dc3?! Qd2=) 19...Qc7 20.Bf3 Bd6 21.g3 e5? (better is 21...Rd8+–) 22.fe5 (22.Bd5 Kh8 23.fe5 fe5 24.Rf8 Bf8 25.Qe5 Qe5 26.Be5 Nd7+–) 22...Be5 23.Bd5 Kh8 (23...Rf7 24.Qd3 Ba1 25.Ra1 g6+–) 24.Qe5! (24.Qe5 Qd7 25.Be4+–) 1–0. Hingst,Thomas (2095) – Gottwald,Bernhard (1910), RSS5E NoEngine–97, 2009. nbsp;

5.f4 c5

6.Nf3= a6 7.Bc4=.

6.Nf3 d5

7.c4 a6 8.ba6 Na6 9.Qa4 Nd7 10.Qb5=.

7.c4 Bd6 8.Be2 0–0 9.0–0 Nbd7 10.a4 Re8 11.Na3 (11.Nc3 d4 12.Na2 (12.ed4 cd4 13.Nb1 Bf4 14.Bd4 Qc7 15.a5–/+; 12.Nb1 Qc7 13.a5 ba5 14.ed4 cd4 15.Bd4–/+) 12...a6 13.Nc1 de3 14.de3 Qc7 15.Nd3+=; 11.Ne5 A) 11...dc4 12.Bc4 (12.Nc4 Bc7 13.Bf3 Bf3 14.Qf3 e5 15.fe5=; 12.Na3 c3 13.Bc3 Be5 14.fe5 Ne4 15.Bh5=; 12.Nd7 Nd7 13.Bc4 Qh4 14.Nc3 a5 15.ba6=) 12...a6 13.d3 ab5 14.Bb5 Qe7 15.Nd2+=; B) 11...a6 12.Na3 (12.ba6 Ba6 13.Na3 Qc7 14.cd5 Be5 15.fe5=; 12.Nd7 Nd7 13.ba6 Ba6 14.Na3 e5 15.cd5=) 12...Qb8 13.Nd7 Nd7 14.cd5 Bd5 15.ba6+=; C) 11...Qc7 12.Nd7 (12.d4 cd4 13.ed4 dc4 14.Bc4 Ne5 15.fe5+=) 12...Nd7 13.Bd3 e5 14.cd5 ef4 15.Qh5=) 11...Qe7 (11...e5 12.Ne5 (12.fe5 Ne5 13.a5= ba5 14.cd5 Bd5 15.Be5+=; 12.Be5 Be5 13.fe5 Ne5 14.Ne5 Re5 15.Bf3=) 12...Ne5 13.Be5 Be5 14.fe5 Re5 15.Bf3=; 11...Qc7 12.cd5 (12.Qe1 e5 13.fe5 Ne5 14.Be5 Be5 15.Ne5=) 12...ed5 13.Rc1 Qb8 14.Bd3 Ne4 15.Nh4=; 11...d4 12.ed4 (12.a5 ba5 13.ed4 cd4 14.Nd4 Bc5 15.Kh1+=; 12.Re1 Qc7 13.ed4 Bf4 14.dc5 bc5 15.h3–/+; 12.Qc2 Qc7 13.Rae1 e5 14.fe5 Ne5 15.ed4–/+; 12.Qb3 Qc7 13.Nc2 e5 14.fe5 Ne5 15.ed4+=; 12.Rb1 Qc7 13.ed4 Bf4 14.dc5 bc5 15.Kh1+=; 12.Ra2 Qc7 13.ed4 Bf4 14.dc5 bc5 15.Kh1+=) 12...Bf4 13.Ne5 Bg5 14.Bf3 Ne5 15.de5=; 11...Qb8 12.cd5 (12.Qe1 e5 13.fe5 Ne5 14.Be5 Be5 15.Ne5=; 12.d4 Ne4 13.Ne5 Ndf6 14.a5 ba5 15.Bf3+=; 12.Qc2 Qc7 13.Ng5 e5 14.fe5 Be5 15.Be5+=; 12.Nc2 a6 13.d4 dc4 14.Bc4 Bd5 15.Ne5=) 12...ed5 13.Rc1 c4 14.Nd4 a6 15.ba6=; 11...Be7 12.Ne5 Qc7 13.d3 Ne5 14.Be5 Qd7 15.a5=) 12.Ne5 (12.Qc2 Red8 13.cd5 ed5 14.Nh4 Qe6 15.Nf5=) 12...Rac8 (12...d4 13.Nc6 Bc6 14.bc6= Nf8 15.a5=) 13.Bf3+= Bb8 (13...Ra8 14.d3 a6 15.Qe1+=) 14.Qe1 (14.Qe2 Ne5 15.fe5+=) 14...Ne4 (14...Ne5 15.fe5 Qc7 16.d4= (16.ef6?? Qh2 17.Kf2 Bg3 18.Ke2 Be1 19.Rae1 g6–+)) 15.cd5 (15.d3!? Ne5 16.fe5+/–; 15.Nd7+=) 15...ed5= (15...Bd5 16.Nc6 Bc6 17.bc6+–) 16.Be4 (16.Bh5 Ne5 17.fe5 Rf8=) 16...de4+= (worse is 16...Be5 A) 17.Be5?! de4 18.Nc4 A1) 18...Ne5?! 19.fe5 (worse is 19.Ne5 Red8+=) 19...Bd5 20.Nd6=; A2) 18...f6+=; B) 17.Bh7 Kh7 18.Be5 Ne5 19.fe5+/–) 17.Nd7 Qd7 18.Qg3 g6 (18...f5 19.Nc4+=) 19.Qg5= Qe7 (19...Qf5 20.Qf5 gf5 21.a5=) 20.Bf6 Qf8 21.Nc4 h6 22.Qh4 Bc7 23.Ne5 Kh7 (23...h5 24.Ng4 Bd5 25.f5+–) 24.g4 (24.Ng4 Bd8+/–) 24...Bd8 (better is 24...Bd5!?+=) 25.g5+/– h5 (25...Rc7 26.Ng4 h5+/–) 26.Ng4 (better is 26.f5!? Bd5 27.fg6 fg6 28.Bd8+–) 26...Rc7 (26...Qd6!?+=) 27.f5 Qd6 28.fg6 (28.Rf2 c4+/–) 28...fg6+= 29.Rf2 Bc8 (29...Qe6!? 30.Bd8 Rd8 31.Nf6 Kg7=) 30.Bd8+/– Bg4 (30...Rd8!? 31.Nf6 Kg7+/–) 31.Bc7+– Qc7 32.Raf1 (32.Rf6 Qd8+–) 32...Bf3+/– 33.Rf3 ef3 34.Rf3 Rd8 35.Qc4 Kg7 36.Qc3 Kh7 37.Qf6 Rg8 (37...Qd7 38.h3+/–) 38.Qe6 (38.Qf7 Rg7 39.Qc7 Rc7+–) 38...Rg7+/– 39.Rf8 Qd7 40.Qd7 Rd7 41.Ra8 Kg7 42.Kf1 Kf7 43.Ke2 h4 44.Rh8 Ke6 45.Rf8 Kd5 46.Rf4 (46.Rg8 Kc4+–) 46...Rh7 (46...h3 47.d3+–) 47.Rf6 Rg7 48.h3 (48.d3 h3+–) 48...Ke5 (48...Kc4 49.Rf4 Kb3 50.d3+–) 49.Kf3 (49.Kd3 Kd5+–) 49...Rd7 50.Kg4 Rd2 51.Rg6 Ke4 (51...Ra2 52.Rg8 Ra4 53.Kh5+–) 52.Re6 (52.Re6 Kd5 53.Re7 Rg2 54.Kh4+–) 1–0. Kuehn,Peter – Hein,Ralf, corr DDR–ch12 sf07, 1983.

7.c4 Nbd7 8.Be2 Qc7 9.0–0 Bd6 10.a4 0–0 11.Na3 Rad8 (11...d4 12.Qc2=) 12.Qc2 (12.cd5 e5=) 12...d4+= 13.Rf2 (13.Bd3 de3 14.de3 e5 15.fe5 Ne5 16.Be5 Be5 17.Ne5 Qe5–/+) 13...h6 (13...e5 14.fe5 Ne5 15.Ne5 Be5 16.Bf3 Bh2 17.Kh1–+) 14.Bd3 (14.a5 ba5 15.Bd3 e5–/+) 14...Ng4 (14...e5 15.fe5 de3 16.de3 Ne5 17.Bf5+=) 15.Rff1 (15.Re2 Bf3 16.gf3 Ngf6=) 15...de3+= 16.Qc3 (16.h3!? e2 17.Be2+=) 16...f6–/+ 17.h3 Nf2 (better is 17...Bf4!? 18.hg4 Be5–+) 18.de3 Nd3 19.Qd3 Rf7 20.Nh4 (20.Nc2 Nf8 21.Qc3 Be4+=) 20...Nf8 21.Qe2 (21.Rad1 Rfd7 22.Qc2 f5+=) 21...Be4 (21...Rfd7 22.Rad1+=) 22.Rad1 (22.Qg4 Kh7+=) 22...Rfd7 23.g3 (23.Nf3 Be7 24.Nc2 Rd3–/+) 23...Be7–/+ Black gets the initiative 24.Rd7 Qd7 25.Rf2 Qd1 26.Qd1 Rd1 27.Rf1 Rd3 28.Bc1 Rb3 29.Rd1 (29.Nf3 Rb4–/+) 29...Rb4 (29...g5 30.Ng2 Rb4–/+) 30.Bd2 (30.Kf2!?–/+) 30...Ra4–+ 31.Ra1 (31.Bc1 f5–+) 31...Bd3 (better is 31...a6 32.ba6 Ra6–+) 32.Nf3? (better is 32.Bc3!?–+) 32...Bc4 (better is 32...a6–+) 33.Ne1 (33.Bc3 Bd3 34.Ne1–+) 33...Bb5! 34.Nec2 (34.Nb5 A pinning theme 34...Ra1 A pinning theme) 34...Bd3 Black intends c4 35.Ne1 Be4 36.Kf2 (36.Bc3 a6–+) 36...c4 (36...b5 37.Bc3 a6 38.Ke2–+) 37.Nec2 (37.Nac2 Ra1 38.Na1 a5–+) 37...Bc2 (better is 37...b5!? 38.Bc3–+) 38.Nc2 Ra1 39.Na1 Nd7 40.Ke2 e5 (40...b5 41.Nc2–+) 41.Bc3 (41.Nc2 Kf7–+) 41...Bd6 (41...Kf7 42.Nc2–+) 42.f5 (42.Nc2 b5–+) 42...Kf7 43.e4 (43.g4 Nc5–+) 43...Bc5 (43...b5 44.Nc2–+) 44.Nc2 Ke7 (44...a5 45.Kd2–+) 45.Kd1 (45.Nb4 Bb4 46.Bb4 Nc5 47.Bc5 bc5–+) 45...Kd6 46.Kc1 Kc6 (46...b5 47.g4–+) 47.Kb2 (47.Kd1 b5–+) 47...b5 48.Nb4 (48.Kc1 Bb6 49.Bb4 a5–+) 48...Bb4 49.Bb4 Nc5 50.Ka3 Ne4 51.Bf8 Ng3 52.Bg7 Nf5 53.Bf6 e4 (53...e4 54.Bc3 Kc5–+) 0–1. Kulbacki,Jim – Panzel,Kenneth, Cleveland,OH, 1981.

7.c4 Nbd7 8.Be2 Be7 9.0–0=.

7.c4 Nbd7 8.Be2 g6 (8...Be7 9.0–0=) 9.0–0 Bg7 10.cd5 ed5 (10...Bd5 11.Nc3=) 11.f5 (11.Nc3 0–0+=) 11...Qe7 12.Qb3 (12.Nc3 0–0=) 12...0–0 (12...c4 13.Qa3=) 13.fg6 (13.Nc3 Rae8=) 13...fg6 14.Nc3 Kh8 (14...c4 15.Qa3 Nc5 16.Na4=) 15.Rae1 c4 16.Ba3 (16.Qa3 Qa3 17.Ba3 Nc5=) 16...Nc5 (worse is 16...cb3 17.Be7 Rf7 18.Bf6 Nf6 19.Ng5=) 17.Qc2 Ng4 (17...a6 18.Bc5 bc5 19.b6+=) 18.Nd1 (18.e4 de4 19.Bc4 Qd7 20.Bc5 ef3 21.Bf8 Bd4 22.Re3 Ne3 23.de3 Be3 (23...Rf8? 24.Qd3+–) 24.Rf2 Bf2 (worse is 24...Rf8 25.gf3 Rf3 26.Nd1 Qg4 27.Kf1 Rf2 28.Nf2 Bf2 29.Qf2 Qc4 30.Qe2–+) 25.Qf2 Rf8–+) 18...Bc8 (18...a6 19.Bc5 bc5 20.b6+=) 19.h3 (19.Bb2 a6 20.Bg7 Kg7=) 19...Bf5+= 20.Qc1 Nf6 21.Bb2 (21.Nd4 Be4+=) 21...a6–/+ 22.ba6 Ra6 23.Nd4 Bd3 24.Nc6 (24.Nc3 Be2 25.Re2 Nd3–/+) 24...Qd6 25.Nb4 Be2 26.Re2 Ra4 27.a3 Nce4 28.Rf3 Ra7 (28...Qe6 29.Nc3 Ra5 30.Qc2+=) 29.d3 (29.Nc3 Ra5–/+) 29...Ng3 (29...cd3!? 30.Nd3 Raf7–/+) 30.Ref2+= Raf7 (better is 30...cd3!? 31.Nd3 Nge4–/+) ½–½. Muri,Heinrich – Cusmir,Constantin, Coppa Latina, 1995.

7.Be2 a6=.

7.Be2 Bd6 8.0–0 0–0 9.Ne5 (9.Be5 a6=) 9...Nfd7 (9...a6 10.Na3=) 10.Qe1 (10.Nd7 Nd7 11.Qe1 Re8=) 10...f6 (10...a6 11.Qg3 f6 12.Qh3=) 11.Nf3 e5 (11...a6 12.Nc3=) 12.Nh4 (12.fe5 Ne5 13.Nc3 a6=) 12...ef4 13.Nf5 Be5 14.d4 cd4 (14...Bc7 15.ef4 g6 16.Qg3+=) 15.ed4 (15.ef4 Bc7+=) 15...Bc7 16.Ba3 Re8 17.Nd6 Bd6 18.Bd6 a6 19.Bf4 (19.Qd1 ab5 20.Rf4 Re6=) 19...ab5 20.Nc3 (20.Qd2 b4=) 20...b4 21.Nb5 Nc6 22.Qf2 (22.Nd6 Nd4 23.Ne8 Ne2 24.Qe2 Qe8=) 22...Ba6= 23.Bd3 Bb5 24.Bb5 Re6 (24...Na7 25.Ba6 Nc8 26.Bb7+=) 25.Rae1+= Re1 26.Re1 Na7 27.Ba6 Nc8 28.Bb7 Ra5 29.Qe2 (29…Nf8 30.Qe8 Qe8 31.Re8+/–) 1–0. Kucharkowski,Jens – de Bouver,Guido, Orang–Utan Invitational, 2002.

7.Be2 Nbd7 8.0–0 Rc8 9.c4 Bd6 10.Ne5 (10.Qa4 Ra8=) 10...0–0 11.d4 (11.Bf3 Qc7 12.Nd7 Nd7=) 11...Ne4 (11...cd4 12.Bd4 Be5 13.fe5+=) 12.Nd2= Nd2 13.Qd2 Nf6 (13...cd4 14.Nd7 Qd7 15.Qd4=) 14.Rac1 (14.Qd1 a6=) 14...Ne4 15.Qd3 (15.Qd1 f6 16.Nf3 Qd7=) 15...f6 16.Ng4 (16.Bg4 Qe7 (16...fe5? 17.Be6 Kh8 18.Bc8 dc4 19.Rc4+/–) 17.cd5 Bd5=) 16...Rf7 (16...dc4 17.Qc4 Qd7 18.dc5 Rc5 19.Qd3+=) 17.Rc2 (17.Bf3!?=) 17...dc4+= 18.Rc4 (18.Qd1 c3 19.Bc3 Bd5+=) 18...Bd5 19.Ra4 (19.Rcc1!?+=) 19...c4–/+ 20.Qc2 Qe8 (20...Qd7 21.Bf3 c3 22.Ba3 Qb5 23.Rc1–/+) 21.Rb1 (21.Nf2 Nf2 22.Rf2 Qb5–/+) 21...Qb5–+ 22.Ba3 Qc6 23.Bf3 b5 (23...f5 24.Nf2 Nf2 25.Kf2–+) 24.Ra5 Ba3 25.Ra3 Rb7 26.Nf2 (26.Rb4 Rd7–+) 26...Nf2 27.Kf2 Qb6 Black prepares b4 (27...Bf3 28.gf3 e5 29.fe5 fe5 30.Qe4 ed4 31.ed4–+) 28.Bd5 (28.Be4 Be4 29.Qe4 f5–+) 28...ed5 29.Qf5 (29.Rab3 Qc6 30.R3b2 Rcb8–+) 29...Rd8 30.Rc3 a5 Black plans b4 31.h4 (31.h3 b4–+) 31...b4 32.Rcc1 (32.Rc2 Re7–+) 32...Re7 33.Re1 Re4 34.Qh3 a4 (34...Rde8 35.Qd7 Qe6 36.Qe6 R8e6 37.h5–+) 35.g4 (35.h5 Qd6–+) 35...b3 36.g5 c3 37.gf6 (37.ab3 c2 38.Rbc1 ab3 39.gf6 Qf6–+) 37...c2 (37...gf6?! 38.Rg1 Kh8 39.Qg4–+) 38.Rbc1 (38.Qg4 Qf6 39.Rbc1 Rb8–+) 38...Qf6 (38...b2 39.Qg3 g6 40.Rc2–+) 39.ab3 ab3 40.Rg1 (40.Qh1 Rc8 41.Qh3 Rc7–+) 40...Rde8 41.Rg3 (41.Qg3–+) 41...b2 (41...b2 42.Rc2 b1Q–+) 0–1. Kucharkowski,Jens – Muster,Frank, corr DDR, 1988.

7.Be2 Nbd7 8.0–0 Bd6 9.Qe1 0–0 10.Ne5 Qc7 11.d4 (11.Nd7!? Nd7 12.Qg3=) 11...cd4–/+ 12.ed4 (12.Nd7 Nd7 13.Bd4 Qc2–/+) 12...Qc2 13.Bc3 (13.Qd2 Qd2 14.Nd2 Rac8–/+) 13...Be5 (13...a6!?–/+) 14.fe5+= Ne4 15.Rf3 Qa4 16.Bb4 Rfc8 17.Rb3 (17.Ra3 Qc2 18.Nc3 Qb2 19.Ne4 de4+=) 17...a5 18.Nc3 Nc3 19.Bc3 Rc7 (19...f6 20.ef6 Nf6 21.Bd3+=) 20.Bd3 Rac8 21.Bb2 f5?? (better is 21...h6=) 22.ef6+/– Nf6 23.Qe6 Kh8 24.Qb6 Rf7 25.Qe6 Rcc7? (25...Kg8+–) 26.Qd6 Rce7 (26...Ne8 27.Qa3 Qa3 28.Ra3+– (28.Ba3?! a4 29.b6 ab3 30.bc7 ba2+/–)) 27.Bc3 Re6 (27...Rd7 28.Qb8 Ng8+–) 28.Qe6 (28.Qe6 Rc7 29.Qb6+–) 1–0. Mitov,Borislav Nankov – Barwinski,Dionizy, corr ICCF, 1986.

5.f4 Bc5

6.Nf3 0–0 7.Be2 a6 8.a4 (8.0–0 ab5 9.Bb5 Nc6+=) 8...d5 (8...ab5 9.ab5 Ra1 10.Ba1=) 9.0–0= c6 10.ba6 (10.Nc3 Nbd7=) 10...Ba6+= 11.Ba6 (11.Nc3 Nbd7+=) 11...Na6 12.Ne5 Qc8 (12...Qc7 13.Nc3+=) 13.d4 (13.a5 ba5 14.Ra5 Qc7+=) 13...Be7 (13...Bb4 14.Ba3+=) 14.Nd2 b5 (14...Rd8 15.a5 ba5 16.Ra5+=) 15.Qe2 Qb7 (15...ba4 16.Ra4 c5 17.c4=) 16.Rfb1= Nd7 (16...Nb4 17.ab5 cb5 18.Ba3=) 17.Ndf3 (17.e4 Ne5 18.fe5 f6=) 17...Ne5= 18.Ne5 b4 (18...ba4 19.Ra4 f6 20.Nd3=) 19.c3 (19.e4 c5=) 19...f6 20.Nd3 c5 (20...Rfb8 21.cb4 Nb4 22.e4=) 21.dc5 b3 (21...Bc5 22.cb4 Bb4 23.Ba3+– (23.Nb4 Nb4 24.Bc3 Qa6 25.Qa6 Na6+=)) 22.Ba3 (22.Qg4 f5 23.Qg3 Bc5=) 22...Rfb8+= 23.Qd1 (23.Nc1 Qc6 24.Nb3 Qa4+=) 23...Qc7 The pressure on the isolated pawn grows (23...Nc7 24.c6 Qc6 25.Be7 Ra4+–) 24.Rb3+= Rb3 25.Qb3 Nc5 26.Nc5 Bc5 27.Bc5 Qc5 28.Kf2 h6 (28...e5 29.Rd1 Rd8 30.Qb5 Qc3 31.Rd5 Qc2 32.Kf3+/–) 29.Qb4+= White intends a5 29...Qc6 30.a5 Kh7 (30...Ra6 31.Kg1+=) 31.Qb2 (31.Kg1 Ra6+=) 31...Qc4 (31...Ra6 32.Kg1+=) 32.Qb1 (32.Qc2 g6+=) 32...f5 (32...Kg8 33.Qb4 Qd3 34.Qd4+=) 33.Qb4 Qd3 34.Ra2 (34.Qd4 Qb5 35.Qa4 Qb2 36.Kf1 Qc3=) ½–½. Bonetti,Shane (2110) – Nemec,Zdenec (2040), Orangutan Cup, Final, 2005.

6.Nf3 0–0 7.Be2 a6 8.a4 d5 9.0–0 c6 10.c4 dc4=+ 11.Bc4 ab5 12.ab5 Ra1 13.Ba1 cb5 14.Bb5 Be7 15.Qe2 Nc6 16.Bb2 Ne4 17.Ne5 Ne5 18.fe5 Qd5 19.Bc4 Qc6 20.Nc3 Nc3 21.Bc3 Rc8 22.Rf4 Bg5 23.Bb5 Qc5 24.Rc4+= Qd5 25.Rd4 Qb3 26.Bd3 Qa3 27.Rb4 Bd8 28.Qd1 Bd5 29.Ra4 Qc5 30.Qh5 g6 31.Qg4 Bc7 32.Qh3 Bd8 33.Qh6 b5 34.Rb4 Rb8 35.Rb1 b4 36.Qf4 b3 37.Rf1 Rb7 38.Rc1 Qe7 39.Rb1 Qc5 40.Rc1 ½–½. Mehlhorn,Uwe – Nemec,Zdenek, b4/03/15, 2003.

6.Nf3 0–0 7.Be2 a6 8.a4 d5 9.0–0 c6 10.Nd4 Bd6 11.Nf3 ab5 12.ab5 Ra1 13.Ba1 c5 14.Ne5 Nbd7 15.Bd3 c4 16.Nd7 Qd7 17.Bf6 cd3 (worse is 17...gf6 18.Bh7 Kh8 19.Qh5+/–) 18.Qg4 g6 19.Qh4 Ra8 (19...Qb5?? 20.Qh6 Qb1 21.Qg7; 19...dc2?? 20.Qh6 cb1Q 21.Qg7) 20.cd3 Qb5 21.Bd4 Bc5 22.Be5 Qd3 23.Qf6 Kf8 24.Qh8 Ke7 25.Bf6 Kd7 26.Qh7 Rf8 27.Bg7 Re8 28.Bf6 Qf5 29.Qh4 (29.Qf7? Be7–+) 29...b5 30.g4 Qe4 31.Nc3 Qc2 32.Qe1 b4 33.Qd1 (33.d4!? Bd6 34.Nd1+=) 33...Qd1–/+ 34.Nd1 Ba6 35.Re1 Be7 36.Bd4 Rc8 37.Nb2 Bb5 38.Ra1 Bc5 39.Bf6 Bb6 40.h4 (40.Na4 Bd8 41.Bd4 Rc2 42.Nc5 Kc6–/+) 40...Rc2–+ 41.h5? (better is 41.Na4 Ba4 42.Ra4 Rd2 43.Rb4 Be3 44.Kh1–+) 41...Rd2 42.h6 (42.Re1 gh5 43.gh5–+) 42...Be3 43.Kh1 d4 44.Ra7 Kc8 45.Ra8 (45.Rc7 Kc7 46.Be5 Kd7 47.Bd4 Bc6) 45...Kb7 46.Ra7 Ka7 47.Bd4 Bd4 48.h7 Bc6 0–1. Josefsson,Kenneth (2370) – Barnsley,Anthony R (2415), ICCF corr W–23ch sf05, 1999. (=1.e3 b6 2.b4 Nf6 3.Bb2 Bb7 4.f4 e6 5.b5 Bc5)

5.f4 c6

6.a4 d5 7.Nf3 Nbd7 8.c4 c5 9.Be2 g6 10.0–0 Bg7 11.d3 0–0 12.Ne5 Ne5 13.fe5 Nd7 14.d4 dc4 15.Bc4 Qg5 16.Qe2 Rac8 17.Rf2 Bh6 18.Ra3 Rc7 19.Qf1 Qh4 20.Be2 cd4 21.ed4 Rc2 22.Bf3 Rb2 23.Rb2 Bf3 24.Rf3 Qd4 25.Qf2 Qd1 26.Qf1= Qa4 27.Nc3 Qd4–/+ 28.Qf2 Qf2 29.Rbf2 Ne5 30.Rh3 Ng4 31.Ra2 Rc8 32.Ne2 Rd8 33.g3 Rd2 34.Rd2 Bd2 35.Kg2 e5–+ 36.Rh4 f5 37.h3 g5 (37...g5 38.hg4 gh4 39.gf5 hg3 40.Ng3 Kf7–+; 37...Ne3 38.Kg1 e4 39.Nd4–+) 0–1. Psion – Psion, 4 Min, 1990.

6.a4 d5 7.Nf3 Nbd7 8.c4 c5 9.Be2 g6 10.0–0 Bg7 11.d3 0–0 12.Ne5 Ne5 13.fe5 Nd7 14.d4 dc4 15.Bf3 (better is 15.Bc4!? Qg5 16.Qd2=) 15...Bf3–/+ 16.Rf3?? (better is 16.Qf3 cd4 17.ed4=+) 16...Ne5!–+ 17.Rf1 (17.de5 Qd1) 17...Nd3 18.Ba3 (18.Ra2 cd4 19.Ba3–+) 18…Bd4 (19.Nd2 Be3 20.Kh1 Nf2 21.Rf2 Bf2–+) 0–1. Lusanin,SP – Lipovan,V, corr ICCF EU–I, 1980.

5.f4 d5

6.Nf3 Nbd7 7.Bd3 Bd6 8.Qe2 (8.0–0 a6=) 8...Nc5 9.0–0 Nd3 10.cd3 0–0 11.Nd4 Rc8 (11...Nd7 12.Nc6 Qe8 13.Nd4=) 12.Nc6 (12.Rc1 a6=) 12...Bc6 13.bc6 Qe8 (13...b5 14.Kh1=) 14.Bf6 gf6 15.Qg4 Kh8 16.Qh4 (16.Rc1 Rg8 17.Qf3 Qf8=) 16...Be7=+ (16...Qc6?? 17.Qf6 Kg8 18.Rf3+–) 17.Rc1 Rg8 18.d4 (18.a4 f5 19.Qh5 d4=+) 18...f5 (18...Rd8 19.d3=+) 19.Qh5 (19.Qf2 f6=+) 19...Qf8 20.Qf3 (20.d3 Rg4 21.Nd2 Qg7=) 20...Qg7 (20...Qh6 21.Nc3=+) 21.d3 Qg6 (21...Qh6 22.Rc2=) 22.Nc3 (22.a4 a6=) 22...Bb4 (22...a6 23.a4=) 23.Rab1 (23.Ne2 Qh6=) 23...Bc3 24.Rc3 f6 (24...Qh6 25.Rc2=) 25.a4 a5 26.Rcb3 (26.Rb2 Qh6=) 26...Rg7 27.R3b2 Rcg8 28.Re1 Qe8 29.Rc2 Qe7 30.Rd2 Qb4 31.Qd1 Qd6 32.Qc2 e5 33.fe5 fe5=+ 34.de5 Qe5 35.Rde2 Qd6 36.Rf1 Rg5 37.Qc3 R8g7 38.Rf4 Kg8 39.Rc2 Qe6 40.Rf3 Rg4 41.Rcf2 Ra4 42.Rf5+= Qe3?? 43.Rf8 1–0. Trkn – guest4678, ICC, 2004.

6.Nf3 Be7 7.Be2 0–0 8.0–0 c5 9.Qe1 Nbd7 10.d3 Ng4 (10...a6 11.Na3=) 11.Qg3 Bf6 12.Ne5 (12.Qg4? Bb2 13.Nbd2 Ba1 14.Ra1 a6–+) 12...Nh6 13.d4 (13.Nd2 Nf5 14.Qf3 Ne5 15.Be5 Be5 16.fe5 Qg5–/+) 13...Qc7 14.c4 Nf5 15.Qh3 cd4 16.ed4 dc4 17.Nd2 Ne5 18.de5 (18.fe5 Bg5 19.Nc4 Bd5+=) 18...Qc5–/+ 19.Kh1 Be7 20.Nc4 Nh4 (20...Qb5!? 21.a4 Qe8–/+) 21.Ba3= Qa3 22.Na3 (22.Qa3 Ba3) 22...Bg2 A double attack 23.Qg2 Ng2 24.Kg2 Ba3 25.Bf3 Rac8 26.Bc6 (26.Rad1 Rc5+=) 26...Rfd8 (26...a6 27.Bb7 Rc2 28.Rf2 Rf2 29.Kf2 ab5 30.Rd1+=) 27.Rad1 Kf8 28.Kf3 Ke7 29.Ke2 Bc5 30.Rf3 Rd1 31.Kd1 Bg1 (31...a6 32.Rd3 Rc7 33.a4+=) 32.h3 Bh2 (32...a6 33.Ra3=) 33.Rf2= Bg3 34.Rf3 Bh2 ½–½. Smolenskij,A – Schuh,G, corr ICCF cup, 1992.

5.f4 d6

6.Nf3 Nbd7 7.Be2 Be7 (7...a6 8.a4 Be7 9.0–0 0–0 10.Nc3 c5 (10...Nc5 11.Nd4 ab5 12.ab5=) 11.ba6 Ba6 12.Ba6=) 8.0–0 (8.Nd4 0–0 A) 9.Bf3 d5 10.0–0 Nc5 (10...a6 11.a4 ab5 12.ab5=) 11.Nc3 (11.a4 a6 12.Nc3=) 11...a6 12.a4=; B) 9.0–0 a6 10.c4 Nc5 11.Bf3 d5 12.d3=) 8...0–0 (8...a6 9.a4 0–0 10.Nc3 Nc5 (10...e5 11.fe5 de5 12.Qe1=) 11.Nd4 Qd7 12.Bf3=; 8...c6 9.bc6 Bc6 10.Nd4 Bb7 11.Bf3 d5 12.c4=; 8...c5 9.bc6 Bc6 10.Nc3 0–0 11.Rb1 Bb7 12.Nd4=) 9.c4 (9.Nc3 a6 10.a4 (10.Nd4 ab5 11.Bb5 Nb8 12.Rb1=) 10...Nc5 (10...e5 11.fe5 de5 12.Qe1=) 11.Nd4 Qd7 12.Bf3=) 9...Ne4 (9...a6 10.Nd4= Nc5 11.Nc3 Qd7 (11...d5 12.cd5=) 12.d3=) 10.Qc2 (10.Nd4 Ndc5 A) 11.Bf3 Nd3 (11...d5 12.d3+=) 12.Bc3=; B) 11.d3 Nf6 12.Bf3=; 10.d3 Nec5 11.Nbd2 a6 12.Qc2=) 10...Bf6 (10...c5 11.bc6 Bc6 12.Nd4=) 11.d4 Be7 12.Bd3 (12.Nc3+=) 12...f5 13.Nc3 Ndf6 14.a4 (14.d5 ed5 15.cd5 Nc3 16.Qc3 Qd7+=) 14...Nc3 15.Qc3 Ne4 16.Qc2 Bf6 17.a5 Rb8 (17...ba5 18.Ra5 c5 19.Rfa1=) 18.Rfd1 h6 19.Qb3 (19.Nd2 Nd2 20.Qd2 c5+=) 19...Qe8 20.Nd2 Nd2 21.Rd2 Kh8 22.Bf1 Be4 23.ab6 ab6 24.Ra7 Rb7 25.Ra6 Rb8 26.Bc3 Ra8 27.Rda2 Rc8 28.Bb4 Rg8 29.Rd2 (29.Bd3 Bd3 30.Qd3 c5+/–) 29...g5 (29...Ra8 30.Ra8 Qa8 31.Ra2=) 30.c5+= bc5 31.dc5 gf4 32.ef4 Qg6 33.Qh3 dc5 34.Bc5 Rcd8 35.Rd8 Rd8 36.Ra3 Kh7 37.Qe3?? (37.Ra7 Qg7 38.Be3 Rd1=) 37...Rd1?? (better is 37...Bg2 38.Qg3 Bf1 39.Kf1 Rd5–+) 38.Qe2= Rc1 39.Rg3 Qe8 40.Be3 Rb1 41.Bf2 Rb2 42.Qc4 Rc2 43.Qb3 Qd7 44.Re3 Rb2 45.Qc4 Bd5 (45...Bd4 46.Re2 Bf2 47.Kf2–/+) 46.Qc5 Be4 47.Re2 (better is 47.Qc4!?=) 47...Rb1 48.Qc4?? (better is 48.Qe3 Qb5 49.Re1 Re1 50.Qe1–/+) 48...Bd3–+ (48...Qb5? 49.Qb5 Rb5 50.Re4 fe4 51.Bb5+–) 49.Qa2 Qb5 50.Re1 Re1 51.Be1 Bf1 52.Qe6 Bd4 53.Kh1 (53.Bf2 Qb1 54.Qe7 Bg7–+) 53...Bd3 54.h4 Be4 55.Qf7 (55.Kh2 Qf1 56.Qd7 Bg7 57.Qd2–+) 55...Bg7 56.Kg1 Qe2 57.Bf2 (57.Qg8 Kg8 58.Bf2 Qd1 59.Be1 Qe1 60.Kh2 Qd2 61.Kg3 Qg2) 57...Qg4 (57...Qd1 58.Kh2 Qf1 59.Qg8 Kg8 60.Bd4 Qg2) 58.Kf1–+ Qd1 59.Be1 Bd3 60.Kf2 Qe2 61.Kg3 Qe1 62.Kh3 (62.Kh2 Qh4 63.Kg1 Be4 64.Kf1 Qh1 65.Ke2 Qg2 66.Ke1 Qg3 67.Ke2 Bf3 68.Kd3 Bg2 69.Ke2 Qf3 70.Kd2 Qf2 71.Kc1 Qe1 72.Kc2 Qc3 73.Kd1 Bf3) 62...Be4–+. Jovanovic,Momir (2075) – Herich,Manfred (2220), Munich–ch MK, 2006.

6.Nf3 Be7 7.Nc3 Nbd7 8.Ne2 (8.Be2 c6 (8...0–0 9.0–0 a6 10.a4 Nc5 11.Nd4 Qd7=; 8...Nc5 9.0–0 0–0 10.a4 a6 11.Nd4 ab5=; 8...a6= 9.a4 0–0 10.0–0 Nc5 11.Nd4 Qd7=; 8...c5 9.bc6 Bc6 10.Nd4 Bb7 11.Bf3 d5=) 9.a4 0–0 10.0–0 Qc7 11.f5 e5=; 8.a4 a6 (8...0–0 9.Be2 c6 10.0–0 Qc7 11.Nd4 c5=; 8...c5 9.Be2 0–0 10.0–0 a6 11.ba6 Ba6=; 8...a5 9.Be2 0–0 10.0–0 Nc5 11.Nd4 Qd7=; 8...e5 9.fe5 de5 10.Be2 0–0 11.0–0 a6=; 8...c6 9.Be2 0–0 10.0–0 Qc7 11.f5 e5=; 8...d5 9.Be2 0–0 10.0–0 a6 11.Qe1 ab5=) 9.Be2 0–0 10.0–0 Nc5 11.Nd4 Qd7=; 8.Nd4 0–0 9.a4 Nc5 10.a5 ba5 11.Ra5 c6+=) 8...0–0 9.Ned4 Nc5 (9...a6 10.ba6 Ba6 11.Ba6 Ra6 12.Nc6=) 10.Be2 (10.a4 a6= 11.ba6 Na6=) 10...Qd7 (10...a6 11.a4 ab5=) 11.a4 a6 12.0–0 ab5 13.ab5 Na4 14.Ba3 Ra7 15.c4 (15.Nc6 Bc6 16.bc6 Qc6+=) 15...Rfa8 16.Qc2 Qe8 17.d3 Ng4 18.Qd2 Nc5 19.Bb2 Ra1 20.Ra1 Ra1 21.Ba1 Qa8 (21...e5 22.Nf5 Nb3 23.Qb2 (worse is 23.Ne7 Qe7 24.Qc3 Na1 25.Qa1 e4+=) 23...Na1 24.Qa1=) 22.Bc3 Qa3 23.Nc2 Qa2 24.Nb4 (24.Nfd4 Qb1 25.Qd1 Qd1 26.Bd1 f5+=) 24...Qb1 (24...Qb3 25.e4=) 25.Ne1+= Nf6 (25...f5 26.h3 Bf6 27.hg4=) 26.Qc2 Qc2 27.Nec2 Nfd7 28.Kf2 (28.e4 e5+=) 28...e5 29.Bf3 e4 30.de4 Ne4 31.Be4 (31.Ke1 f5=) 31...Be4 32.Nd4 Kf8 (32...Bh4 33.g3 Bf6 34.Nd5=) 33.Na6 (33.Ndc6 Bf6 34.Bd4 Bd4 35.ed4 Nf6+=) 33...Bd3 (33...Nc5 34.Nc7 Bd3 35.Nc6 Ne4 36.Ke1 Nc3 37.Kd2 Nb5 38.cb5+=) 34.Nc7 Bc4 (34...Bd8 35.Na6 Nf6 36.Kf3=) 35.Nf5+= f6 36.Bb4 (36.e4 g6 37.Ne7 Ke7+=) 36...Nc5= 37.Kf3 g6 38.Nd4 (38.Ne7!? Ke7 39.e4=) 38...Bd8+= 39.Bc5?? (better is 39.Na6+=) 39...dc5–+ (39...Bc7?! 40.Bb4=) 40.Nce6 Ke7 (40...Ke7 41.Nd8 Kd8–+) 0–1. Berlow,Peter – Coudari,Camille, Montreal, 1971.

5.f4 Ne4

6.d3 Qh4 7.g3 Ng3 8.Nf3 Bf3 9.Qf3 Nh1 10.Ke2 Qf2 11.Qf2 Nf2 12.Kf2 f6 13.Bg2 c6 14.Nd2 a6 15.bc6 Nc6 16.a4 Rc8 17.c3 d5 18.Bh3 Kf7 19.e4 de4 20.Ne4 Be7 21.Ba3 f5 22.Nd6 Bd6 23.Bd6 Rhd8 24.Ba3 Rd3 25.Bf1 Rc3 26.Ba6 Rd8 27.Ra2 Rd4 28.Bb5 Rf4 29.Kg2 Nd4 30.Bd6 Rg4 31.Kf2 Rf3 32.Ke1 Rg1 33.Kd2 Rg2 34.Ke1 Ra2 0–1. hal1958 – PurpleKnight25, playchess.de, 2002.

6.Nf3 a6 7.a4 Be7 (7...f6 8.Nc3=) 8.Bg7+= Rg8 9.Bb2 (9.Be5!?+=) 9...Bh4= 10.g3 Bf6 (10...Ng3 11.hg3 Bf3 12.Qf3 Rg3 13.Rh4 Qh4+/– (13...Rf3? 14.Rh7 d5 15.Rh8 Kd7 16.Rd8 Kd8 17.Bg2+–)) 11.c3+= Ng3? (better is 11...Bd5!?+=) 12.hg3+– Rg3 13.Rh3 Bh4 14.Rg3 (14.Nh4?! Rh3 15.Ng2 Bf3=) 14...Bg3 15.Ke2 Bf3 16.Kf3 Qh4 17.Na3 h5 18.Ke4 Qh1 19.Kd3 d5 20.Kc2 Qe4 21.Kc1 h4 22.c4 Qf5 23.Qc2 ab5? (23...Qc2 24.Kc2 ab5 25.ab5 c6+–) 24.Qf5 ef5 25.Nb5 Na6 26.cd5 0–0–0 27.a5 Nc5 28.Kc2 ba5 29.Ra5 Rd5 30.Ra8 (30.d4 Ne4 31.Na7 Kb7 32.Rd5 Ka7 33.Rf5 Nd6+–) 30...Kd7 (30...Kb7 31.Ra7 Kb8 32.Bc4+–) 31.Nc3 (31.Bc4!? Rd6 32.Nd6 Kd6+–) 31...Rd6 32.Ba3 Be1 33.Bc5 Rd2 34.Kb3 Rh2 (34...Kc6 35.Bd4 Kb7 36.Ra7 Kb8+–) 35.Bb5 Ke6 36.Re8 (36.Ra6 c6 37.Rc6 Kd7 38.Rd6 Kc8 39.Ba6 Kb8 40.Rc6 Rb2 41.Kb2 Bc3 42.Kc3 h3 43.Rc8) 36...Kf6+– 37.Nd5 Kg6 (37...Kg7 38.Bd4 f6 39.Bf6 Kg6 40.Rg8 Kf7 41.Rg7 Kf8 42.Nc7 Rb2 43.Bb2 h3 44.Ne6) 38.Rg8 Kh6 (38...Kh7 39.Nf6 Kh6 40.Bf8) 39.Bf8 (39.Bf8 Kh5 40.Nf6) 1–0. Queiroz,AB (2055) – Vasconcelos,PC Da S (1835), Sao Paulo BRA, 3rd IRT Open, 2013.

5.f4 Be7

6.Nf3 0–0 7.c4 d5 8.Qc2 a6 9.a4 Nbd7 10.d4 dc4 11.Bc4 Bf3 12.gf3 Nd5 13.Bd5 ed5 14.Qg2 Re8 15.Nc3 Bb4 16.Ke2 Bc3 17.Bc3 Qf6 (better is 17...Qe7 18.Bd2 ab5 19.ab5 Nf8+=) 18.Rac1? (better is 18.Qg5+=) 18...ab5 19.Qg4 Nf8 20.Rhg1 Ng6 (20...ba4 21.f5–+) 21.Kf2 (21.ab5 Ra2 22.Kf1 Re3–+) 21...Ra4 22.f5 (22.Rc2–+) 22...Ra2 23.Kf1 Qh4 (23...Re3 24.Rg2 h5 25.Qg3 Qf5 26.Ra2 Rf3 27.Ke1 Rg3 28.hg3–+) 24.Qh4? (24.Rg2 Rg2 25.Qg2–+) 24...Nh4 25.f6 g6 (25...Nf3 26.Rg7 Kh8 27.h3 Re3 28.Ra1 Ra1 29.Ba1 Nd2 30.Kg2 Re2 31.Kg3 Ne4 32.Kh4–+; 25...Re3 26.Rg7 Kh8 27.Rf7 Rf3 28.Kg1–+) 26.Bb4 Re3 27.Rc7 Rf3 28.Ke1 Rf6 (better is 28...h5 29.Kd1 Rf6–+) 29.Rc8 (29.Rc8 Kg7 30.Bf8 Kg8 31.Bh6) 1–0. Meybohm,Dirk – Andre,G, 1993.

6.Nf3 0–0 7.Bd3 h6 8.0–0 d5 9.Nc3 Nbd7 10.Ne2 Rc8 11.Ned4 c6 12.bc6 Bc6 13.Ba6 Rc7 14.a4 Nb8 15.Bd3 Bb7 (better is 15...Ne4!?=) 16.Nb5+/– Rc5 17.Na7 Ra5 18.Nb5 Bc6 19.Ne5 Bb5 20.Bb5 Nfd7 (better is 20...Bc5!?+–) 21.Bd7 Nd7 22.Nc6 Qe8 23.Na5 ba5 24.Bd4 Bf6 25.Rb1 Bd4 26.ed4 Nf6 27.Rb5 Qd8 28.d3 Qc7 29.Qd2 Ra8 30.f5 Nh7 (30...Qa7 31.Qe3 ef5 32.Rf5+–) 31.fe6 fe6 32.Qe1 Qc2 (32...Nf8+–) 33.Rc5 Qa4 (33...Qd3 34.Qe6 Kh8 35.Rc8 Rc8 36.Qc8 Nf8 37.Rf8 Kh7 38.Rh8 Kg6 39.Qg4 Kf7 40.Qh5 Qg6 41.Qd5 Qe6 42.Rf8 Kf8 43.Qe6 g5 44.d5 g4 45.d6 Kg7 46.d7 g3 47.d8Q gh2 48.Kh2 h5 49.Qdg8) 34.Qe6 Kh8 35.Rc8 (35.Rc8 Rc8 36.Qc8 Nf8 37.Rf8 Kh7 38.Qf5 g6 39.Qf7) 1–0. Krueger,Jan – Wood,Ben A (1670), England – Sweden, 2007.

6.Nf3 c5 7.Be2 0–0 8.0–0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 d5 12.c4 Nbd7 13.Bb2 Qc7 14.Qb3 Ra8 15.Na3 Bd6 16.Nc2 e5 17.fe5 Ne5 18.Ne5 Be5 19.Be5 Qe5 20.Ne1 dc4 21.Bc4 Bd5 22.Nf3 Bc4 23.Qc4 (23.Ne5?? Bb3 24.d4 c4–+) 23...Qe4 24.Qe4 Ne4 25.Rb1 Ra2 26.d3 Nd2 27.Nd2 Rd2 ½–½. Taus,Martin (2170) – Johnson,Heinrich (1755), 40. LSS No Engine Cup Preliminary, 2011.

6.Nf3 c5 7.Be2 0–0 8.0–0 a6 9.ba6 Ba6 10.Nc3 Bb7 11.Ne5 d6 12.Bf3 Qc8 13.Bb7 Qb7 14.Ng4 Nbd7 15.a4 Rfe8 16.f5 e5 17.e4 Ng4 18.Qg4 Nf6 19.Qf3 Bf8 20.d3 Rec8 21.Rfd1 Ra5 22.Rdb1 Qc6 23.g4 h6 24.h4 c4 25.g5 Nd7 26.gh6 gh6 27.Kh2 Nf6 28.Rg1 Kh7 29.Qg3 cd3 30.cd3 b5 31.Nd5 (time, 1–0). aspasio – Nyi, ICC, 1999.

6.Nf3 d6 7.Be2 0–0 8.0–0 Nbd7 9.a4 a6 10.c4 ab5 11.cb5 Nc5 12.Nc3 e5 13.fe5+/–.

6.Nf3 d6 7.Be2 Nbd7 8.0–0 0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 Be7 4.e3 b6 5.f4 0–0 6.Nf3 Bb7 7.Be2 d6 8.0–0 Nbd7).

4.e3 d6

5.a4 Nbd7 6.Nc3 h6 7.Nf3 g6 8.Bc4 Bg7 9.0–0 Bb7 10.a5 Qe7 11.ab6 cb6 12.Qe2 0–0 13.h3 Ne5?? 14.Ne5+– de5 15.Ba3 Qc7 16.Bf8 Rf8 17.Ra7 Rb8 18.Rfa1 Kh7 19.e4 Nd7 20.h4 Nc5 21.h5 g5 22.Qe3 Nd7 23.d3 Nf6 24.Na4 Nh5 25.Qb6 Qb6 26.Nb6 Nf4 27.Nd7 Ra8 28.Ra8 Ba8 29.Ra8 Ne2 30.Kf1 Nd4 31.c3 Nc2 32.Bb3 (32.Bb3 Nd4 33.cd4 ed4 34.b6+–) 1–0. jasio – moda5, internet, 2011.

5.a4 h6 6.Nf3 Be7 7.c4 Bd7 (7...e5 8.Nc3=) 8.Be2 d5 9.0–0 Bd6 10.cd5 Nd5 (10...ed5 11.d3+=) 11.Qc2 (11.Bg7 Rg8 12.Bb2 a6+/–) 11...f6 (11...0–0!?+=) 12.Qg6+/– Kf8 13.Nc3 Be8 14.Qc2 Qe7 15.Nd5 ed5 16.Rac1 (better is 16.Nd4+/–) 16...g5? (16...a6!?+/–) 17.Nd4 (17.Qf5 a6 18.Bf6 Qf7+–) 17...g4? (17...a6+–) 18.Nf5 (18.Bg4 Bd7 19.Nf5 Qe6+–) 18...Qd7 (18...Bg6 19.Ne7 (worse is 19.Bg4 h5 20.Bh3 a6+–) 19...Bc2 20.Nd5+– (20.Rc2?! Ke7 21.Bg4 a6+–)) 19.Nd6 Qd6 20.Bg4 (20.Qc7 Qc7 21.Rc7 Bd7 22.Bf6 Rg8+–) 20...Rg8 (20...c5 21.d4 c4 22.Qf5+–) 21.Bh3 (21.Bc8 Bg6 22.Qc7 Qc7 23.Rc7 Be4+–) 21...Nd7? (21...c5+–) 22.Qc7 Qc7 23.Rc7 Ne5 (23...Rg7 24.d4 Ke7 25.Rfc1+–) 24.Rfc1 (24.Ba3) 24...Nd3 (24...Rg6 25.Ba3 Kg8 26.d4 Nf3 27.Kh1+–) 25.Bf6 (better is 25.Ba3 Nc5 26.R1c5+–) 25...Nc1 26.Rc1 (26.Be6!? Bh5 27.Bd5 Re8 28.Bg8 Kg8 29.Rc1 Kf7+–) 26...a6 27.ba6 (27.a5!? ba5 28.b6 Rg6+–) 27...Ra6+/– 28.f4 (28.Bd4 Rg6+–) 28...Ra4 (28...b5 29.Bd4 ba4+/–) 29.Be6?? (better is 29.Rc8+/–) 29...Rg6–+ 30.Bd5 Rf6 31.Rc8 (better is 31.d4–+) 31...Rd6 32.Bb3? (32.Bf3 Ra1 33.Kf2 Rd2 34.Kg3–+) 32...Ra1 (better is 32...Ra3!? 33.Bc4 Rd2 34.h3–+) 33.Kf2 Rd2 34.Kf3 Rf1 (34...Ke7 35.Be6–+) 35.Kg3 (35.Ke4 Ke7 36.g4–+) 35...Ra1 36.Bc4?? (36.Kf3 Ke7 37.Be6–+) 36...Rc1–+ 0–1. GuestTXZF – GuestWQDJ, freechess.org, 2017.

5.Nc3 Be7 (5...a6 A) 6.Nf3 Bb7 (6...e5 7.a4 Be7 8.e4 0–0 9.d4 Nbd7 10.ba6=; 6...ab5 7.Bb5 c6 8.Be2 Be7 9.Rb1 e5 10.e4+=; 6...Be7 7.ba6 0–0 8.Be2 Ba6 9.0–0 e5 10.Ba6=) 7.ba6 Na6 8.Bb5 c6 9.Ba6 Ba6 10.d3+=; B) 6.a4 d5 (6...Be7 7.a5 c6 8.ab6 Qb6 9.Na4 Qd8 10.Nc3+=; 6...e5 7.d4 ed4 8.Qd4 Be6 9.Nf3 d5 10.Be2=; 6...Nbd7 7.Nf3 ab5 8.ab5 Ra1 9.Qa1 Be7 10.Be2=) 7.a5 ab5 8.ab6 Ra1 9.Qa1 c6 10.Qa7+=; C) 6.ba6 c6 (6...Ba6 7.Ba6 Na6 8.Nf3 Be7 9.0–0 0–0 10.Re1=; 6...Be7 7.Qf3 d5 8.a7 Ra7 9.Nb5 Rb7 10.Qg3=; 6...e5 7.d4 Ba6 8.Qf3 c6 9.Ba6 Ra6 10.Nge2=) 7.Nf3 Be7 8.Be2 0–0 9.0–0 Ba6 10.Ba6=) 6.Bd3 (6.Nf3 a6 (6...0–0 7.Be2 a6 8.a4 c5 9.0–0 d5 10.ba6=; 6...Bb7 7.a4 0–0 8.Be2 e5 9.a5 ba5 10.Ra5=; 6...e5 7.e4 0–0 8.d4 ed4 9.Qd4 a6 10.a4=) 7.d4 ab5 8.Bb5 c6 9.Bd3 Ba6 10.0–0+=; 6.Be2 0–0 (6...a6 7.a4 0–0 8.Nf3 c5 9.0–0 d5 10.ba6=; 6...Bb7 7.Bf3 Bf3 8.Nf3 a6 9.a4 0–0 10.0–0=; 6...e5 7.d4 ed4 8.Qd4 a6 9.a4 d5 10.Nf3=) 7.Nf3 c6 8.0–0 cb5 9.Bb5 a6 10.Be2=; 6.a4 c5 (6...a6 7.Bd3 0–0 8.Nf3 Bb7 9.0–0 e5 10.Bf5=; 6...0–0 7.a5 a6 8.Qf3 d5 9.ab6 c6 10.ba6=; 6...c6 7.Be2 0–0 8.Nf3 a6 9.0–0 Bb7 10.bc6=) 7.Bd3 0–0 8.Nf3 d5 9.0–0 Bd6 10.Be2+=) 6...0–0 (6...a6 7.a4 0–0 8.Nf3 e5 9.0–0 Bb7 10.Bf5=; 6...e5 7.f4 Bb7 8.e4 a6 9.fe5 de5 10.Nf3=; 6...Bb7 7.Nf3 a6 8.a4 0–0 9.0–0 c5 10.ba6=) 7.Nf3 c6 (7...a6 8.a4 Bb7 9.0–0 e5 10.Bf5=) 8.Nd4 (8.0–0 cb5 9.Bb5 a6 10.Bd3=) 8...e5 (8...Bb7 9.Qf3 Qd7 (9...Qc8 10.Ne4 cb5 11.Nb5 Ne4 12.Be4 Be4 13.Qe4+=) 10.Qh3=; 8...cb5 9.Qf3 d5 10.Bb5+=) 9.Nc6 Nc6 10.bc6 d5 11.e4 d4 12.Ne2 Qd6 (12...Bc5!?=) 13.f4+= Qc6 14.fe5 Ne4 15.Nd4 Qh6 16.0–0 Bb7 (16...Nd2 17.Rf2 Bg5+/–) 17.Qe1+/– Nd2 (17...Nc5!? 18.Nf5 Qg5 19.Ne7 Qe7+/–) 18.Rf2+– Bh4 19.Qd2 Bf2 20.Qf2 (20.Kf2?? Qd2 21.Ne2 Rad8–+) 20...Rfd8 (20...Qg5+–) 21.Rf1 Rd5 (21...Bd5 22.Nf5 Qg5+–) 22.Qf7 Kh8 23.Qf8! Rf8 (23...Rf8 24.Rf8) 24.Rf8 1–0. Janek – Vesely, internet, 2016.

5.Be2 Bb7 6.Nf3 (---> 4.e3 Bb7 5.Nf3 d6 6.Be2).

5.Nf3 e5 6.Be2 (6.d4 e4 7.Nfd2 Bf5=) 6...Nbd7 (6...a6 7.a4=) 7.c4 (7.0–0 a6=) 7...Bb7 (7...a6 8.0–0=) 8.0–0 Nc5 (8...a6!?=) 9.d4+/– ed4 10.ed4 Ne6 11.d5 Nc5 12.Nd4 (12.Re1 Be7+/–) 12...Be7 13.Re1 0–0 14.Nf5 Re8 15.Ne7 (15.Bf1 Bc8 16.Ne7 Re7 17.Bf6 gf6+/–) 15...Re7 (15...Qe7 16.a4+=) 16.Bf6+/– gf6 17.Bh5 (17.Nc3 a6+/–) 17...Re1+= 18.Qe1 Qe8 19.Qd1 Ne4 (19...Qe5 20.Na3+=) 20.Nd2 (20.Qg4 Ng5 21.Nd2 Qe5+/–) 20...Qe5 (20...Nd2 21.Qd2 Qe5 22.Qd1+=) 21.Qg4+/– Ng5 22.h4?? (better is 22.Rf1 a6 23.f4 Qd4 24.Rf2 ab5 25.fg5 Qg4 26.Bg4 bc4 A) 27.Rf6?! Bd5 28.Bf3 Bf3 (28...Ra2? 29.Bd5 Rd2 30.Bf7 Kg7 31.Bc4+–) 29.Rf3 d5=; B) 27.gf6?! Bd5 28.Nb1 Be6 29.Be6 fe6+/–; C) 27.Nc4 Bd5 28.Ne3 Ba2 29.Bf3+/–) 22...Qa1–+ 23.Nf1 (23.Kh2 Bc8 (23...Qa2 24.hg5 Bc8 25.Qe4+=) 24.Qg3 h6–+ (24...Qa2?! 25.Ne4 Bf5 26.Nf6 Kf8 27.Qg5+=)) 23...Bc8 24.Qg3 Qe5 (24...Qc1 25.hg5 fg5 26.Qf3–+) 25.hg5 (25.f4 Qe7 26.hg5 fg5 27.Qg5 Qg5 28.fg5–+) 25...Qg3 (25...fg5 26.Qf3 f5 27.Qh3–+) 26.Ng3 fg5 0–1. GuestVSPS – GuestPWLJ, freechess.org, 2016.

5.Nf3 g6 6.c4 Bg7 7.Be2 0–0 8.0–0 d5 9.Nc3 dc4 10.Bc4 c5 11.Be2 Bb7 12.d3 Nbd7 13.Qc2 Qc7 14.h3 Ne5?? (better is 14...a6=) 15.Ne5+– Qe5 16.Ne4 Qf5 (16...Qb2 17.Qb2 Ne4+–) 17.Nd6?? (better is 17.g4 Ng4 18.Bg4+–) 17...Qd5+= 18.Nb7 Qb7 19.Bf3 Nd5 20.Bg7 Kg7 21.Qb2 Kg8 22.e4 Ne7 23.Rac1 (23.d4 Rfd8 24.Rfd1 Rac8+=) 23...Qd7 (23...Rad8 24.Rfd1 Rd4 25.Rc4=) 24.Rfd1+= Qd4 (24...Rfd8+=) 25.Qb3 (better is 25.Qd4!? cd4 26.Rc7+/–) 25...Rad8 26.Rc4 Qd7 (26...Qf6 27.a4=) 27.Ra4 (27.Qb2 a6 28.ba6 Qa7+/–) 27...Nc8 (27...e5!?=) 28.e5+= Ne7 29.Qa3 (29.d4!? cd4 30.Qd3+/–) 29...Qb5= 30.Ra7 Nc6 Attacking the backward pawn on d3 0–1. GuestMXJR – Guestihjk, freechess.org, 2017.

4.Nf3 a6

5.a4 a5 6.e3 Bb7 7.Be2 Be7 8.c4 d6 9.d4 Nbd7 10.0–0 0–0 11.Qc2 (11.Nc3 e5+=) 11...h6 (11...Rc8 12.Nbd2=) 12.Nbd2 Rc8 13.e4 c5 14.e5 (14.bc6 Bc6 15.Rfc1 Nh5=) 14...Nh7 (14...Ne8 15.Rae1=) 15.Bd3+= Ng5 16.Ng5 Bg5 17.Ne4 de5 (17...Be4 18.Be4 cd4 19.ed6= (worse is 19.Bd4 d5–/+)) 18.Nd6 Rc7 (18...cd4 19.Nb7 Qc7 20.Bh7 Kh8 21.Be4+/–) 19.de5 Bf4 20.Be4 (20.Qe2 Qa8 21.Nb7 Qb7+–) 20...Be4 (20...Ba8 21.Rad1+=) 21.Qe4+/– Qg5 22.g3 Bd2 23.Rad1 Bb4 24.f4 Qe7 (24...Qg4 25.Qf3 Qh3 26.Qg2 Qg2 27.Kg2+/–) 25.f5 f6 (25...Qg5 26.Qe2 Kh7 27.f6+–) 26.ef6 (26.fe6 Qe6 27.ef6 Qe4 28.Ne4 gf6+–) 26...Nf6+/– 27.Qe6 Kh8 (27...Qe6 28.fe6 Re7 29.Bf6 Rf6 30.Rf6 gf6 31.Nf5 Re6 32.Rd6+–) 28.Rf4 Nh5?? (better is 28...Rd7+–) 29.Qh6 (29.Qh6 Kg8 30.Qh5+–) 1–0. DEFFM – GuestXMYW, freechess.org, 2017.

5.a4 Bb7 6.e3 (--> 4.e3 Bb7 5.Nf3 a6 6.a4).

5.a4 Be7 6.Nc3 0–0 7.e3 d5 8.Bd3 Nbd7 9.0–0 Bb7 10.ba6 Ba6 11.Ba6 Ra6 12.Qe2 Qa8 13.Nd4 Nc5 14.Ba3 Re8 15.Ndb5 Bd8 16.Rfd1 (16.Bc5!? bc5 17.Rfb1=) 16...Na4–/+ 17.Na4 Ra4 18.Bb2 c6 19.Nc3 Ra1 20.Ra1 Qb7 21.Qa6 Qc7 22.Qa7 Ng4 23.h3 Qh2 24.Kf1 Nf2 25.Qa4? (25.Kf2 Bh4 Double attack) 25...Nh3! 26.gh3 (26.gh3 Qh1 Double attack (26...Qh1 Decoy)) 26...Qh3 27.Kg1 Qg3 28.Kf1 Qf3 29.Kg1 e5 30.Qc6 (30.Qa8–+) 30...Qg4 31.Kf1 Qf5 32.Ke2 Qh5 33.Kd3 e4 34.Ne4 de4 (34...Re4?! 35.Ra8 Qf5 36.Kc3 Qe5 37.Kd3=) 35.Kc4 Re6 36.Qd7 Qc5 37.Kb3 Qd6 38.Qb5 h6 (38...Qd2?! 39.Ra8 Qd6 40.Be5+=) 39.Ra8 Re7 (39...Qd2 40.Bd4 Kh7 41.Qf5 (41.Rd8?! Qg2+/–) 41...Rg6 42.Qf7+–) 40.Qc4 Re8 (40...Qd2?! 41.Qd4 Qd4 42.Bd4=) 41.Qb5 Qe6 42.c4 f6 43.Rb8 Kh7 44.Bd4 Rg8 45.Bb6 Bb6 46.Rb6 Qc8 47.Qd5 Qg4 48.Kc3 f5 49.c5 Qg5 50.Rd6 Rf8 51.c6 Qe7 52.Qc5 Qf7 53.Rd7 Qf6 54.Kc4 Rb8 55.Rb7 Rc8 56.c7 Qf7 57.Kb5? (57.Kd4!?–/+) 57...h5 58.Qd6 Ra8 (58...h4 59.Kc6 Qc4 60.Kd7=) 59.Ra7 Re8 (59...Ra7 60.c8Q+/–) 60.Ra4 Qb3 61.Rb4 Qa2 62.Qc5 Qe6 63.Rd4 Qc8 64.Qc6 h4 65.Rd7 h3 (better is 65...Rf8!?–/+) 66.Qd5+= Re5 67.Rg7 Kg7 68.Qe5 Kf7 69.Qd5 (69.Qd5 Ke8 70.Kb6+–) 1–0. Rooijen Van,Peter (1655) – Pott,Brian (1740), RB–2009–0–00057, 2009.

5.c4 ab5 6.cb5 d6 Prevents intrusion on e5 (6...Bb7 7.h4=) 7.e3 Nbd7 8.Be2 Bb7 9.0–0 Be7 10.d4 (10.Qc2 Bf3 11.Bf3 Ra7=) 10...0–0 (10...Be4 11.Qc1=) 11.Nbd2 c6 12.a4 cb5 13.Bb5 Ba6 14.Qb3 Bb5 15.ab5 h6 Controls g5 16.e4 (16.Ra6 Rc8=) 16...Qb8 17.Rfc1 (17.Ba3 Re8=) 17...Qb7 18.Qd3 Ra1 19.Ra1 Black has a cramped position 19...Ra8 20.Rc1 (20.Ra6 Nb8 21.Ra8 Qa8=) 20...Rc8 21.Rc8 Qc8 22.h3 Consolidates g4 22...d5 23.e5 White threatens to win material: e5xf6 23...Ne8 24.Ba3 Ba3 25.Qa3 Nc7 26.Qc3 Qd8 27.Qc6 Ne8 28.Qc2 Qc7 29.Qa4 f6 Black threatens to win material: f6xe5 30.Qa8 White threatens to win material: Qa8xe8 30...Qb8 Black threatens to win material: Qb8xa8 (30...Kf7 31.Qa1=) 31.Qc6 White threatens to win material: Qc6xd7 31...Qc7?? (better is 31...Nf8= this is the best bet to save the position) 32.Qe6+– Kf8 33.Qd5 (better is 33.Nh4 and the rest is a matter of technique 33...Ne5 34.de5 Qc2+–) 33...fe5 34.de5 1–0. Springer,Heinrich Victor (1790) – Neuenbaumer,Jan Holger, Berlin Eckbauer op 4th (6), 2001.

5.e3 Bb7 6.Nc3=.

5.e3 Be7 6.a4 0–0 7.Be2 Bb7 (7...d6 8.0–0=) 8.0–0 c6 9.d4 (9.Nc3 d6=) 9...ab5 (9...Qc7 10.ba6 Ba6 11.c4=) 10.ab5 Ra1 11.Ba1 Qc7 12.Nc3 d5 13.bc6 Nc6 14.Nb5 Qd7 15.c4 Rc8 16.Ne5 (16.cd5 Qd5 17.Qb1 Nb4=) 16...Ne5 17.de5 Ne4 18.f3 Nc5 19.cd5 Qd5 (19...ed5 20.Nd4=) 20.Nd6 Ra8 21.Bc4 Qc6 22.Bb5 Qd5 (22...Qc7 23.Qd4=) 23.e4 Qa2 (23...Qd1 24.Rd1 Ba6 25.Ba6 Ra6 26.Bd4=) 24.Bd4+= Ba6 25.Rf2 Qa5 26.Ba6 Qa6 27.Rb2 f6 28.Rb1 Qd3 29.Qd3 Nd3 30.Bb6 (30.Rb6 fe5 31.Bc3 Rd8–+) ½–½. Rosner,Dirk – Milde,Lars, Tiger SC, 2001.

5.a4 ab5

6.ab5 Ra1 7.Ba1 d6 8.e3 Be7 9.Be2 Nbd7 10.0–0 0–0 11.c4 Bb7 12.Nc3 Nc5 13.Nd4 Nfe4 14.Bf3 Bf6 15.Ne4 Ne4 16.d3 e5 (better is 16...Nc5!?+=) 17.Be4+– Be4 18.de4 ed4 19.ed4 Re8 20.Re1 Qa8 21.Qc2 Qc8 22.h3 Bh4 23.Kh2 f6 24.g3 Bg5 25.f4 Bh6 26.c5 bc5 27.dc5 Qe6 28.cd6 Qd6 29.Qc4 Kh8 30.e5 fe5 31.Be5 Qb6 32.Re2 Re5 (32...Rg8+–) 33.fe5 (33.Re5 Qf2 34.Kh1 Qf3 35.Kg1 Qg3 36.Kf1 Qh3 37.Ke1 Qh4 38.Kd1 Qd8 39.Rd5 Qc8+–) 33...Bg5 34.Qf7 h6 35.Qf8 (better is 35.Ra2!? Qb8+–) 35...Kh7 36.Qf5 Kg8 (36...Kh8 37.Ra2 Qb7 38.Qd7+–) 37.e6 Qd6 38.Qf7 White plans e7 38...Kh7 39.e7 (39.e7 Be7 40.Qe7+–) 1–0. Khakimzianov,Rinat – Khaziev,Anvar (2090), Ufa Cup, 2007.

6.ab5 Ra1 7.Ba1 g6 8.c4 (8.e4 Bb7 9.e5 Nd5+=) 8...Bg7 (8...Bb7 9.e3=) 9.e3 0–0 10.d3 (10.d4 d5=) 10...Bb7 11.Nbd2 d5 12.Be2 Nbd7 (12...c6 13.0–0=) 13.0–0 c6 (13...c5 14.bc6 Bc6 15.Qb1+=) 14.Qc2 (14.bc6 Bc6 15.Qb1 Qe7+=) 14...Qc8 (14...cb5 15.cb5 Qb8 16.Rc1=) 15.Qb1 (15.Rb1 cb5 16.Rb5 Qc7+=) 15...cb5 (15...c5 16.Rc1=) 16.cb5+= h5 (16...Qc7 17.Rc1 Qd6 18.d4=) 17.Rc1 Qa8 (17...Qb8 18.Bc3+=) 18.Nd4 (18.Ne5 d4 19.Bd4 Bg2+/–) 18...Nc5 (18...Rc8 19.N2f3+=) 19.N2f3 (19.Nc6 Ncd7+/–) 19...Nfd7 (19...Qa4+=) 20.Nd2 (20.Nc2 f6+=) 20...Ne5 (20...Nf6 21.Nc6+/–) 21.N2b3 (21.N4b3 Rc8+=) 21...Nb3 (21...Rc8 22.Rc2+=) 22.Nb3+/– Rc8 23.Nd4 (23.f4 Nd7+/–) 23...Nd7 (23...Rc1 24.Qc1 Nd7 25.Bc3+=) 24.Nb3 Nc5 (24...Ne5 25.f4 Rc1 26.Qc1+/– (worse is 26.Nc1 Nf3 27.Bf3 Qa1 28.Qa1 Ba1=)) 25.Nc5 (better is 25.Bg7 Kg7 26.Nc5 bc5 27.Qb2 f6 28.Ra1+=) 25...Ba1? (better is 25...Qa1 26.Qa1 Ba1 27.Ra1 Rc5+=) 26.Nb7+– (26.Qa1?! Qa1 27.Ra1 Rc5+=) 26...Be5 27.f4 (better is 27.d4!? Bc7 28.Nc5 bc5 29.dc5+–) 27...Bc7+/– 28.Nc5! bc5 29.Rc5 (better is 29.b6!? Bf4 30.ef4+–) 29...Bb6+/– 30.Rc8 Qc8 31.d4 Qc3 32.Qd3 (32.Kf2 Kg7+/–) 32...Qe1 (32...Qc1 33.Bf1+/–) 33.Bf1 f5 (33...Ba5 34.Qe2 Qc1 35.Kf2+/–) 34.Qe2 Qb4 (34...Qc1 35.g3+/–) 35.g3 Kf7 (35...Qc3 36.Qf2+/–) 36.Kf2 (36.Qf2 Qb1+–) 36...Kf6 (36...Qb1 37.h3+/–) 37.h4 (37.Qc2 Ba5 38.Kg2 Kg7+–) 37...Qb1 (37...Ba5 38.Bg2+/–) 38.Qd3 (38.Qd2 Kf7+/–) 38...Qb2 39.Be2 (39.Kg1 Ba5+/–) 39...Qc1 (39...Kg7 40.Kg1+/–) 40.Qb3 (40.Qd1 Qc3+/–) 40...Ba5 41.Qd1 Qd1 (41...Qb2!?+/–) 42.Bd1+– Bb6 43.Ke2 (43.Be2 Ke7+–) 43...Ke7 44.Kd3 Kd7 45.Ke2 Ke7 ½–½. jaddwarrior (2050) – Pawn_Curry (2020), ChessWorld.net, 2017.

5.e3 ab5

6.Bb5 Ba6 7.Ba6 Na6 8.0–0 Be7 (8...d5 9.Nc3=) 9.d3 (9.c4 0–0=) 9...0–0 10.Nbd2 Nb4 (10...d5 11.Ne5=) 11.a3 Nc6 12.Re1 (12.c4 d6=) 12...d5 13.c4 h6 (13...dc4 14.Nc4 b5 15.Nce5 Ne5 16.Ne5=) 14.Qc2 Na5 (14...dc4 15.Qc4 Na7 16.Ne4=) 15.Rac1 (15.cd5 Nd5 16.Be5 c5=) 15...c5 (15...dc4 16.dc4 Nb7 17.Rcd1=) 16.d4 (16.Rb1 Nc6+=) 16...Rc8 (16...cd4 17.Nd4 dc4 18.Nc4 Nc4 19.Qc4 Ba3 20.Nc6+=) 17.Qd3 (17.cd5 Nd5 18.dc5 Bc5=) 17...Qd7 (17...dc4 18.Nc4 Nc4 19.Qc4 cd4 20.Qd4 Qd4 21.Nd4= (worse is 21.Bd4 Rc1 22.Rc1 Ba3+=)) ½–½. Roitzsch,Hans Werner – Buncke,Constantin, GER North–ch U12, 2001.

6.Bb5 Ba6 7.Nc3 Bb4 8.Qe2 0–0+=.

6.Bb5 Ba6 7.c4 Bb5 8.cb5= Bd6 (8...d5!?=) 9.Nc3+= e5 10.Qc2 c6 11.Ne4 Be7 (11...Ne4!? 12.Qe4 0–0+=) 12.Ne5+– 0–0 13.0–0 cb5 14.Rfc1 Bd6?? (better is 14...Nc6+/–) 15.Nd6+– Nc6 16.Nc6 dc6 17.Qc6 Ra4 (17...b4 18.Rc4 Qd7 19.Qb6+–) 18.Qb5 Rg4 (18...Ra5 19.Qb4 Nd5 20.Qg4+–) 19.Be5 (19.Nf5 Kh8+–) 19...Ne4 (19...Qa8 20.Qc6+–) 20.Ne4 Re4 21.d3 Qd3 (21...Rg4+–) 22.Qd3 (22.Qd3 Re5 23.Rc7+–) 1–0. usingprogram (2040) – paaponen, kurnik, 2011.

6.Bb5 Ba6 7.c4 c6!? 8.Ba6 Na6=.

6.Bb5 Ba6 7.c4 Be7=.

6.Bb5 Bb7 7.0–0 Be7 8.d4 0–0 9.Nbd2 Ba3 10.Ba3 Ra3 11.c4 d6 12.c5 Bf3 13.Nf3 Ra5=+ 14.Qe2 c6 15.Bc4 bc5 16.dc5 Rc5 17.Rfd1 Qc7 18.Nd4 Re8 19.Bd3 Nbd7 20.a4 e5 21.Nb3= Rc3 22.Bc2 (22.Qb2!? Nd5 23.e4=). pierre_d – ChaddyPhil, ChessWorld.net, 2005.

6.Bb5 Be7 7.0–0 0–0 8.a4 (8.Be2 Bb7=) 8...Bb7 9.d4 Nc6 (9...Na6 10.a5=) 10.Nbd2= Ne8 11.e4 Nd6 12.Re1 White prepares the advance e5 12...f5 13.e5 Nb5 14.ab5 Ra1 15.Qa1 Na5 (15...Nb4 16.Qa4=) 16.Bc3 Qa8 17.Ba5 (17.Qa4!?+=) 17...Qa5= 18.Qa5 ba5 19.c3 (19.Ra1!? Ra8 20.Ra4=) 19...Ra8 20.Ra1 Bd8 (20...a4 21.Kf1–/+) 21.Nc4 The isolani on a5 becomes a target (21.Nb3!?=) 21...a4+= 22.Nfd2 Bd5 (22...Bg5 23.Nf3 Bf3 24.gf3+=) 23.Ne3+= Bb7 (23...a3 24.Nd5 ed5 25.Kf1+=) 24.g3 (better is 24.Nec4!?=) 24...Kf7 25.Ndc4 Be7 (25...g5 26.b6+=) 26.Kf1 (26.b6 d5 27.ed6 cd6+=) 26...g6 (26...a3 27.b6 cb6 28.Nb6–/+) 27.Ke2 (27.b6 d5 28.ed6 cd6+=) 27...g5–/+ 28.Nd1 (28.h3 f4 29.Nc2 Bg2–/+) 28...Bd5 (28...a3!?–/+) 29.Ncb2? Exerts pressure on the isolated pawn (29.Ncb2 a3 30.Nd3–+; better is 29.Nde3 a3 30.Nd5 ed5 31.Ne3+=). Gruszczynski,Boleslaw – Lozinski,Jozef, corr 1AMM Poland, 1991.

4.Nf3 Bb7

5.a4 a5 6.e3 Be7 7.d3 0–0 8.Be2 c5 9.c4 d5 10.Nbd2 Nbd7 11.Rc1 Qc7 12.0–0 Rfe8 13.d4 Rac8 14.cd5 Bd5 15.Bd3 Qb8 16.Qe2 Bf8 (16...Qb7 17.e4 c4 18.Bb1+/– (18.Nc4?! Ne4 19.Ne3 Bd6=)) 17.e4+= Bb7 18.e5 (18.e5 Nd5 19.Qe1=). Taulien,Hans_Juergen – Kievelitz,Bernd, remoteschach.de, 2002.

5.a4 Bb4 6.c3 (6.e3 a6 (6...0–0 7.Be2 a6 8.0–0 c6 9.Ne5 d6=; 6...c6 7.Bc4 0–0 8.0–0 a6 9.Nc3 d5=; 6...c5 7.c3 Ba5 8.d3 0–0 9.Nbd2 a6=) 7.Be2 0–0 8.0–0 c6 9.bc6 Nc6+=) 6...Be7 (6...Bd6 7.e3 0–0 8.Be2 a6 9.d3 Re8=) 7.d3 (7.e3 a6 8.Be2 0–0 9.0–0 d5=) 7...0–0 (7...Bf3 8.ef3 0–0 9.Be2 a6+=) 8.e4 a6 (8...d5 9.e5 Nfd7 10.d4=) 9.Be2 c6 (9...d5=) 10.Nbd2 ab5 11.ab5 Ra1 12.Qa1 cb5 13.Ba3 Nc6 14.0–0 Qc7 (14...Nh5 15.Rb1+=) 15.Be7= Ne7 16.Rb1 Ng6 17.Rb5 Ra8 (17...d5 18.Qb1=) 18.Qb2= Ba6 19.Rb6 Nf4 20.Bf1 Bd3 21.Rb7 Qc8 22.e5 Bf1 23.Kf1 Ng4 24.Qb1 Ng6 25.Ne4 (25.Rb5 Qc3 26.Rb8 Rb8 27.Qb8 Nf8+=) 25...h6–/+ 26.Rb5 Ra1! 27.Qa1 Qc4 28.Kg1 Qb5 29.Nd6 Qb6 30.Nd4 N6e5 31.N6b5 d5 32.Qa8 (32.h3 Nf6–+) 32...Kh7 33.h3 Nf6 34.Qc8 Nd3 35.c4? (better is 35.f3–+) 35...Qa5 36.Kh2 0–1. Meier,Franz – Wolfelschneider,Peter (2060), TT–13 ETC, 2004.

5.a4 Be7 6.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.a4).

5.a4 h6 6.Nc3 d6 7.d3 Nbd7 8.e4 e5 9.Be2 Be7 10.0–0 0–0 11.Qd2 d5 12.Nd5 Bd5 13.ed5 Nd5 14.Ne5 Ne5 15.Be5 Bf6 16.d4 Qe7 17.f4 Rad8 18.a5 Be5 19.fe5 Qg5 20.Qg5 hg5 21.Bd3 Nf4 22.Ra4 Nd3 23.cd3 Rd5 24.Rc1 Rc8 25.ab6 ab6 26.Rb4 Kf8 27.Kf2 Ke7 28.Ke3 Ke6 29.g4 f6 30.Ke4 fe5 31.Rc6 Rd6 32.d5 Kf6 33.Rbc4 Kg6?? 34.Rd6 (34…Kf7 35.Rd7 Ke8 36.Rg7+–) 1–0. kamret (2215) – NN, GameColony.com, 2003.

5.Nc3 d5 6.g3 (6.e3!?=) 6...Bd6 7.Bg2 0–0 8.0–0 c5 9.a4 Nbd7 10.d4 cd4 11.Nd4 Rc8 12.e3 e5 (better is 12...Ne5–/+) 13.Nf5+= Nc5 (13...Bc5 14.Nd5 (< 14.Bd5 Nd5 15.Nd5 g6 16.Nh6 Kg7=) 14...Bd5 15.Bd5+=) 14.Nd6 (better is 14.Nd5!? Bd5 15.Bd5+/–) 14...Qd6= 15.e4 d4 16.Ne2? (16.f4!? Rfe8 17.fe5 Qe5 18.Ne2=+) 16...Be4 (16...Nce4?! 17.Ba3 Qc7 18.Bf8 Kf8 19.f4=; 16...Nfe4?! 17.f3 Nf6 18.c3–+) 17.c3? (better is 17.Be4 Nfe4 18.f3–/+) 17...Bg2–+ 18.cd4 (18.Kg2 Qd5 19.Kg1–+) 18...Bf1 19.Qf1 ed4 20.Nd4 Nce4 21.Rd1 Qb4 22.Ba1 Qa4 23.Nc6 Rc6 24.bc6 Qc6 25.Qg2 Qe6 26.Bb2 Nc5 27.Ba3 Qe2 28.Rc1 Qe4 29.Qf1 Nfd7 30.Rd1 Qa4 31.Rd7 Nd7 32.Bf8 Nf8 33.h4 b5 34.h5 h6 35.Qb1 Qc4 36.Qa1 Qc5 37.Qa2 b4 38.Qa6 Qc1 39.Kg2 b3 40.Qd3 b2 (41.f4 b1Q 42.Qb1 Qb1–+) 0–1. genijalac – Simson9, Caissa.com, 2004.

5.c4 a6

6.a4 c5 7.e3 ab5 (7...Be7 8.ba6 Na6 9.d4+=) 8.cb5 (8.ab5 Ra1 9.Ba1 d5=) 8...d5 9.d3 (9.Be2 Bd6=) 9...Nbd7 (9...Bd6 10.Be2+=) 10.Be2 Bd6 11.h3 0–0 12.Nbd2 Qc7 13.Qc2 e5 14.e4 (14.0–0 Rfd8+=) 14...Rfe8 15.0–0 d4 (15...Ra5 16.Bc3 Ra7 17.Rfe1+=) 16.Nc4 Nf8 17.Bc1 h6 (17...Ne6 18.Nd6 Qd6 19.Nh4=) 18.Bd2= Ng6 19.g3 (19.a5 ba5 20.Rfb1 Nf4 21.Bf4 ef4+=) 19...Bc8 20.Kg2 (20.a5 ba5 21.Ba5 Qb8=) 20...Be6+= 21.Rfb1 Bc4 22.Qc4 Ra7 (22...Be7 23.a5=) 23.a5+= Rea8 24.a6 Qe7 25.Bc1 Rd8 26.Nd2 Bc7 (26...Rda8 27.Kg1+=) 27.Qb3 Ne8 28.Bh5 Qg5 29.Bg4 Qe7 30.Bf5 Nf8 31.h4 (31.Nc4 Nd6 32.Nd6 Bd6+=) 31...g6 (31...Nd6 32.Bg4=) 32.Bh3 Kg7 33.Nf3 Nd6 34.Qc2 Qe8 (34...Qf6 35.Qd2 h5 36.Qg5 Qg5 37.Bg5+/–) 35.Qd2+/– f6 (35...Nb5!? 36.Qh6 Kg8+/–) 36.Qh6+– Kg8 37.Qd2 Nb5 38.Qa2 Kg7 39.Qa4 (39.Qb3 Nc3 40.Rb2 b5+=) 39...Nc3= 40.Qe8 Re8 41.Rb3 b5 (41...Rea8 42.Bd2+=) 42.Bd2–/+ b4 43.Bc3 (better is 43.h5!?–/+) 43...dc3–+ (43...bc3?! 44.Rb7 Rb7 45.ab7=) 44.Ne1 Rea8 45.Nc2 Ra6 46.Ra6 (46.Rbb1 Ra1 47.Ra1 Ba5–+) 46...Ra6 47.Bc8 (47.Bg4–+) 47...Ra2 (47...Ra2 48.Nb4 cb4 49.Rb4 c2–+) 0–1. Helgesen,Helge – Haugen,Arild, 1989.

6.a4 Bc5 7.d4 Bb4 8.Bc3+=.

6.a4 Be7 7.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 a6 7.a4).

6.e3 ab5 7.cb5 Bb4 8.Be2 0–0 9.0–0 Be4 10.d3 Bg6 11.Qb3 Bd6 12.Nbd2 c5 13.Rfc1 Bc7 14.a4 d5= 15.a5 Nbd7 16.ab6 Bb6 17.Nh4 c4? 18.dc4 Ra1+/– 19.Ra1 dc4 20.Qc4 Nd5 21.Ng6 hg6 22.Nf3 f6 23.e4 Nf4 24.Bf1 Re8 25.Rd1 Kf8 26.g3 Nh5 27.Qc6 Re7 28.Ba3 Kf7 29.Be7 Ke7 30.Bc4 e5 31.Qe6 (31.Qe6 Kf8 32.Qf7#) 1–0. marekt – renegade, internet, 2005.

6.e3 ab5 7.cb5 c5 8.bc6 dc6 9.Be2 Bd6 10.0–0 (10…0–0 11.Nc3=). michaelbuss (2745) – CaptainHaddock (2490), ChessWorld.net, 2003.

6.e3 ab5 7.cb5 d5 8.d4 Bb4 9.Nbd2 0–0 10.Bd3 c5 11.bc6 White gets strong initiative 11...Nc6 12.0–0 Bd2 13.Qd2 Qd6 (13...Ne4 14.Qc1+=) 14.a4= Qb4 15.Bc3+= Qd6 (15...Qe7 16.Rfb1 Ne4 17.Be4 de4 18.Ne5 Ne5 19.de5+=) 16.Qb2 (16.Rfb1 Ne4 17.Be4 de4+/–) 16...Qc7 (16...Ba6!? 17.Ba6 Ra6=) 17.Rfb1+/– Ba6 (17...Ne7 18.Ne5 Rfb8 19.Bb4+/–) 18.Qb6 Qb6 19.Rb6 Bd3 20.Rc6 Ne4 21.Ne5 Nc3 22.Rc3 (22.Nd3?! Na4 23.Kf1 Rfb8+=) 22...Bb5 23.a5 Rfc8 24.Rc8 Rc8 25.g3 f6 26.Nf3 Rc6 27.Nd2 Bc4 (27...Ba6 28.Nb3+–) 28.Nc4 Rc4 29.a6 Rc8 30.a7 Ra8 31.h4 h5 32.Kg2 Kf7 33.f4 (33.Kf3 Ke7+–) 33...f5 34.Kf3 g6 (34...Ke7 35.Ra6+–) 35.Ke2 Ke7 36.Kd3 Kd7 37.Ra6 Ke7 38.Kc3 Kd7 39.Kb4 Kc7 40.Re6 Ra7 (40...Kb7+–) 41.Re7 (41.Re7 Kb6 42.Ra7 Ka7 43.Kc5+–) 1–0. Junger,Uli – Jenal,R, GER–chT U20 Germany, 1978.

5.c4 c5

6.bc6 Nc6 7.Nc3 (7.e3 Be7 8.Be2 0–0 9.0–0 Rc8 10.Nc3 d5 11.cd5=) 7...d5 (7...Bb4 8.a3 Bc3 9.Bc3 0–0 10.Qc2 d6 11.d4+=; 7...Be7 8.e4 0–0 9.Be2 d5 10.cd5 ed5 11.ed5+=) 8.cd5 ed5 (8...Nd5 9.e4 Nf4 10.d4 f5 11.ef5=) 9.e3 a6 (9...Be7 10.Be2 d4 11.Nd4=) 10.Ne2 (10.Rc1 Be7 (10...d4 11.Nd4 Nd4 12.ed4 Bd6=) 11.Be2=) 10...Bd6 (10...Bc5 11.Rc1=) 11.Ned4 Ne7 12.Be2 0–0 13.0–0 Rc8 14.Qb3 Ne4 15.Rfc1 Nc5 16.Qd1 Qd7 17.Rab1 Ng6 18.Ba1 b5 19.Ne1 Bb8 20.f4 Ne7 21.Nd3 Ne4 (21...Bd6 22.Nc5 Rc5 23.Rc5 Bc5 24.Bd3=) 22.Ne5 (22.Rc8 Nc8 (worse is 22...Bc8 23.a4+/–) 23.a4 ba4+=) 22...Qd6 23.d3 Nc5 24.Bc3 f6 25.Nef3 Qd7 26.Qd2 Rfe8 27.Rc2 Ba7 28.Rbc1 Nf5? (better is 28...Na4 29.Ba1 Rc2 30.Rc2 Nc8=) 29.Nf5+– Qf5 30.Bd4 Qe6 31.Bc5 Bc5 32.Rc5 Rc5 33.Rc5 Qe3 34.Qe3 Re3 35.Kf2 Re7 36.Nd4 Kf7 37.Nb3 (37.Bf3 b4+–) 37...d4 (37...Ke6 38.Na5+–) 38.Nd4 Rd7 39.Nc2 Re7 (39...g6 40.Ne3+–) 40.Bf3 1–0. Kleiser,Gregor (2155) – Matosec,Thomas (2085), AUT–chT2S, 2000.

6.e3 d5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5).

5.c4 Bc5

6.d4 Bb4 7.Bc3 a5=.

6.e3 0–0 7.Nc3 a6 8.d4 Be7 9.Bd3=.

6.e3 0–0 7.Nc3 d5 8.d4= Be7 9.Be2 Nbd7 10.0–0 c5 11.a4 cd4 12.Nd4 Bc5 13.Na2 dc4 14.Bc4 Ne5 15.Bb3 Ng6 16.Nc1 Bd5 17.Bc2 Bb7 18.Nce2 Qd5 19.f3 Rad8 20.Qb1 h6 21.Bg6+/– fg6 22.Qg6 Qg5 23.Qg5+– hg5 24.Ng3 Bd4 25.Bd4+– Nd5 26.Ne4 Nb4 27.Ng5 Rd6 28.Be5 Rd5 29.f4 Nd3 30.Ne6 Re8 31.Ng7 Ree5 32.fe5 Kg7 33.e4?? Re5+= 34.Rad1 Be4 35.Rfe1?? Nc5?? 36.Rf1 Rg5 37.g3 Bd3 38.Rfe1 Rf5 39.Re7 Kf6? 40.Ra7+– Ke5 41.Re7 Kd6 42.Ree1 Kd5 43.Ra1 Kc4 44.Rec1 Kb3 45.a5 ba5+/– (46.Ra5 Nb7+/–). stoker – Vargas5, Caissa.com, 2004.

6.e3 0–0 7.d4 Bb4 8.Bc3 a5=.

6.e3 0–0 7.Be2 d5 8.0–0 dc4 9.Bc4 c6 10.Nc3 Nd5 11.Nd5 ed5 12.Be2. stoker – dit3, Caissa.com, 2004.

6.e3 a6 7.d4 Bb4 8.Bc3=.

5.c4 c6

6.bc6 Nc6 7.Nc3 d5 8.cd5 ed5 9.e3 a6 10.Ne2 Bd6 11.Ned4 Ne7 12.Be2 0–0 13.0–0 Rc8 14.Qb3 Ne4 15.Rfc1 Nc5 16.Qd1 Qd7 17.Rab1 Ng6 18.Ba1 b5 19.Ne1 Bb8 20.f4 Ne7 21.Nd3 Ne4 22.Ne5 Qd6 23.d3 Nc5 24.Bc3 f6 25.Nef3 Qd7 26.Qd2 Rfe8 27.Rc2 Ba7 28.Rbc1 Nf5 29.Nf5 Qf5 30.Bd4 Qe6 31.Bc5 Bc5 32.Rc5 Rc5 33.Rc5 Qe3 34.Qe3 Re3 35.Kf2 Re7 36.Nd4 Kf7 37.Nb3 d4 38.Nd4 Rd7 39.Nc2 Re7 40.Bf3 1–0. Kleiser,Gregor – Matosec,Thomas, Klagenfurt, 2000.

6.e3 cb5 7.cb5 a6 8.Nc3 ab5 9.Nb5 Ba6 10.a4 Bb5 11.ab5 Ra1 12.Ba1 Bc5 13.Bc3 0–0 14.d4 Bd6 15.Bd3 Qc7 16.Bd2 e5 17.Qc2 Qc2 18.Bc2 ed4 19.Nd4 Bc5 20.Bc3 g6 21.Nf5 Nd5?? 22.Nh6# 1–0. pierred – s226922, Yahoo, 2005.

6.e3 cb5 7.cb5 Bd6 8.Be2 0–0 9.0–0 h6 10.a4 a6= 11.Nc3 ab5 12.ab5 Ra1 13.Ba1 Bc7 14.Qc2 d5 15.Na4 Nbd7 16.Nd4 Ne5 17.Nc6 Bc6 18.bc6 Nc4 19.Bc4 Qd6 20.g3 Qc6? 21.Bf6 Qc4 22.Qc4 dc4 23.Bc3 b5 24.Nc5 Bb6?? 25.Nd7+– Ra8 26.Nb6 Ra6 27.Nd7 f5 28.Bb4 Kf7 29.Ne5 Kf6 30.f4 g5 31.Nd7 Kg6 32.h4 gf4 33.gf4 h5 34.Rf3 Ra1 35.Kf2 Kf7 36.Rg3 Rh1 37.Ne5 Kf6 38.Rg6# 1–0. TIROLOCO – badboy1221, Caissa.com, 2004.

6.e3 c5 7.Be2 g6 8.d3 Bg7 9.0–0 0–0 10.Nc3 d5 11.a4 Nbd7 12.Nb1 Re8 13.Ne5 Ne5 14.Be5 dc4 15.dc4 Qd1 16.Bd1 Red8 17.Bc2 Nd7 18.Bc7?? Rdc8 19.Ra3 Rc7 20.Nd2 Rd8 21.e4 Nf6 22.e5 Nh5 23.Nf3 Rcd7 24.Raa1 Bf3 25.gf3 Rd4 26.Kg2 Rc4 27.Bb3 Rcd4 28.Rab1 Be5 29.h3 Nf4 30.Kh2 Nh5 31.Kg2 Rh4 32.Rfd1 Rd1 33.Rd1 Nf4 34.Kg3 Rh3 35.Kg4 Rh2 36.Rd8 Kg7 37.Bc2 Rg2 38.Kh4 Bf6# (38...g5#) 0–1. stoker – Dona2, Live Game Caissa's Web, 2004.

5.c4 d5

6.d3 dc4 7.dc4 Bf3 8.Qd8 Kd8 9.ef3 Bc5 10.Bf6 gf6 11.Nc3 Ke7 12.Ne4 Bb4 13.Nd2? Rd8–/+ 14.Rd1 Nd7 15.Be2?? Bd2 16.Rd2=+ Ne5 17.Rd1 Rd1=+ 18.Bd1 Nc4 19.0–0 Na3 20.f4? Nb5–+ 21.Bf3 Rd8 22.Be4 h6 23.f5 Nc3 24.Bc6 Na2 25.fe6 fe6 26.h3 Nb4 27.Ra1 Nc6 28.Rc1 Rd6 29.f4 Kd7 30.Kf2 Nd4 31.Ra1 a5 32.Ra4 Nc2 33.Kg3 Nb4 34.Kh4 Rd4 35.g3 e5 36.Kh5 ef4 37.gf4 Rf4 38.Kh6 Rh4 39.Kg6 Rh3 40.Kf6 Rh2 41.Ra3 Rf2 42.Kg5 Rg2 43.Kf4 Kc6 44.Rc3 Kb7 45.Kf3 Rg7 46.Re3 Rf7 47.Kg4 c6 48.Kg5 c5 49.Kg6 Rd7 50.Re6 Ka6 51.Kf5 c4 52.Re8 c3 (53.Rc8 c2–+) 0–1. stoker – Simson11, Caissa.com, 2004.

6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4).

5.c4 d6

6.d4 Nbd7 7.Nc3 Be7 8.g3 e5 9.Bg2 0–0 10.d5 Nc5 11.Na4 Nfd7 12.Nc5 Nc5 13.Nd2 f5 14.f4 ef4 15.gf4 Bh4 16.Kf1 Bf6 17.Bf6 Qf6 18.Nb3 Nd7 19.Qd4 Rae8 20.Re1 Qd4 21.Nd4 Re3 22.Ne6 Rc8 23.Kf2 Rc3 24.Bf1?? Rc4–/+ 25.Rg1 g6 26.h4?? Bd5–+ 27.Ng5 Nf6 28.e4 Rc2 29.Ke3 Be4 30.Ne4 Ne4 31.Bd3 Rh2 32.Be4 fe4 33.Ke4 Re8 34.Kd5 Re1 35.Re1 Rh4 36.Re8 Kf7 37.Rc8 Rf4?? 38.Rc7–/+ Kf6 39.Rh7 Ra4 40.Kd6 Ra2 41.Kc6 g5 42.Kb7 g4 43.Ka8 g3 44.Ra7 Ra7 45.Ka7 g2 46.Kb6 g1Q 47.Kb7 Qg2 48.Ka7 Qf2 49.b6 Qa2 50.Kb8–+ Qg8 51.Kc7 Qf7 52.Kb8 Qe8 53.Kc7–+ Qe7 54.Kb8 Qd6 55.Kb7 Ke7 56.Ka8 Qd8 (56...Qd8 57.Kb7 Kd6 58.Ka6 Kc5 59.Kb7 Qe7 60.Ka6 Kc6 61.b7 Qa3; 56...Kd7 57.Kb7 Qc5 58.Ka7 Kc6 59.Ka8 Kb6 60.Kb8 Qf8) 0–1. iczker – praguelooser, kurnik, 2011.

6.e3 c6 7.d4 Be7 8.a4 Nbd7 9.Bd3 Qc7 10.Nc3 0–0 11.Rc1 Rad8 12.0–0 Qb8 13.Bb1 c5 14.Qc2 cd4=+ 15.Nd4 Rc8 16.Qd3 d5 17.cd5+= Nd5?? 18.Qh7# 1–0. Milly – CruelTeenWitch, Caissa.com, 2004.

6.e3 Be7 7.Be2 0–0 8.d4 c5 9.Nc3 d5 10.0–0 Nbd7 11.a4 a5 12.ba6 Ba6 13.Nb5 Ne4 14.Rb1 Nd6 15.cd5 Nb5 16.ab5 Bb7 17.de6 fe6 18.Bc4 Bd5 19.Qc2 Nf6 20.Ne5 Bd6 21.dc5 Bc5 22.Ra1 Qe8 23.Bd5 Nd5 24.Ra8 Qa8 25.Qc4 Qe8 26.h3 Nc7 27.Nc6 Qd7 28.Bd4 Bd4 29.Nd4 Rf7 30.Ra1 Qd5 31.Qc6 Qc6 32.bc6 e5 33.Nf3 Re7 34.Ra7 Kf8 35.Ne5 Re5 36.Rc7 Rc5 37.f4 b5 38.Rb7 Rc6 39.Rb5 Rc2 40.e4 Kf7 41.Rb7 Kf6 42.e5 Kg6 43.g4 h6 44.f5 Kg5 45.Rg7 Kf4 46.Kf1 Kf3 47.Ke1 Re2 48.Kd1 Re5 49.f6 Re4 50.Rh7 Rf4 51.Rh6 Ke3 52.g5 Kd3 53.Ke1 Ke3 54.Rh8 Rf5 55.g6 1–0. Tabor – Kane, email 1995.

5.c4 Be7

6.Nc3 0–0 7.a3 c5 8.e3 d5 9.d4 cd4 10.Nd4 a6 11.Bd3 (11.cd5!? Nd5 12.Nd5 Qd5 13.Qg4=) 11...dc4–/+ 12.Bc4 ab5 13.Ndb5 Qd1 14.Rd1 Bg2 15.Rg1 Bf3 16.Rd2 Nc6 17.Ne2 Rfd8 18.Rd8 Rd8 19.Nbd4 Nd4 20.Bd4 (20.Nd4 Bb7–/+) 20...Be2 (20...Ra8!? 21.Bb2 Kf8–+) 21.Ke2+= Ra8 22.Bb6 Ra3 23.Rb1 Ne4 24.Bd4 Ra8 25.f3 Nf6 (25...Nd6 26.Bd3+=) 26.Be5 h6 27.Bd3 ½–½. Kaczmarek,Michal – Richard,Andy, IECC, 1999.

6.Nc3 0–0 7.Qc2 c5 8.e4 d5 Black gets the initiative 9.cd5 ed5 10.Bd3 c4 11.Be2 d4 12.Nd5? (12.Nd4 Qd4 13.Nd5–/+) 12...Bd5 13.ed5 d3 14.Qc4 de2 15.Bf6 Bf6 (15...gf6?! 16.Ke2 Qd7 17.h3–/+) 16.d4 Re8 17.Rb1 Nd7 18.Rc1 Be7 19.Nd2 (19.Ne5 Bg5 20.Nc6 Qf6–+) 19...Nf6 20.Ke2 (20.Nf3 Nd5 21.Ke2 Bg5 22.Kf1 Bc1 23.Qc1 Rc8–+) 20...Ba3 21.Kd3 Bc1 22.Rc1 Nd5 23.Nf3 0–1. Anderson,George – Vincent,Trevor (1990), Winnipeg Game a Month op, 2003.

6.d4 0–0 7.e3 d5 8.Nc3 Nbd7 9.Bd3 Rc8 10.Qa4 c5 11.cd5 cd4 12.Qd4 Nc5 13.Rd1 Nd3 14.Rd3 ed5 15.Rd2 Re8 16.0–0 Rc4 17.Qd3 Qc7 18.Rc1 Bd6 19.h3 Rd8 20.Rdc2 Rc8 21.Nd2 Rc5 22.Ba3 Bh2 23.Kf1 Ne4 24.Bc5 Nf2 25.Kf2 Qg3 26.Kf1 bc5 27.Nf3 d4 28.Ne2 Qd6 29.ed4 Bf3 30.Qf3 1–0. Behrmann – Cas, 1997.

5.e3

5.e3 (--> 4.e3 Bb7 5.Nf3).

5.e3 a6 6.a4 (--> 4.e3 Bb7 5.Nf3 a6 6.a4).

5.e3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7).

5.e3 d5 6.Be2 Be7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 d5).

5.e3 c5

(--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5).

6.c4 d5 7.d4 Nbd7 8.Nbd2 Be7 9.Be2 0–0 10.0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.d4 Nbd7 10.Nbd2).

6.c4 d5 7.Be2 Nbd7 8.0–0 Bd6 9.d4 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).

6.Be2 d5 7.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5 7.Be2).

6.Be2 Be7 7.c4 0–0 8.d3 d5 9.Nbd2 Nbd7 10.0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 0–0 7.0–0 d5 8.d3 c5 9.Nbd2 Nbd7 10.c4).

5.e3 Be7

(--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7).

6.c4 0–0 7.Be2 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 Be7 7.Be2 0–0).

6.c4 0–0 7.Be2 d5 8.0–0 (-->1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.Be2 d5 8.0–0).

6.c4 0–0 7.Be2 d5 8.0–0 c5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5).

6.c4 c5 7.d4 d5 8.Nbd2 0–0 9.Be2 Nbd7 10.0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.d4 Nbd7 10.Nbd2).

6.c4 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 Be7).

6.Be2 0–0 7.0–0 d5 8.c4 c5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5).

6.Be2 0–0 7.0–0 d6 8.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.Be2 d6 8.0–0).

6.Be2 c5 7.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2).

5.g3 Be7

6.Bg2 0–0 7.0–0 c6 8.Nh4 (8.c4 a6 (8...cb5 9.cb5 a6 10.Qc2 d5 11.ba6 Na6+=; 8...d5 9.cd5 Nd5 10.a4 a6 11.Nc3 Bf6=) 9.bc6 Nc6 10.Nc3 Rc8 11.Rb1 d5+=; 8.a4 a6 (8...d5 9.Ba3 c5 10.d4 a6 11.Qd3 Ne4+=) 9.c4 d5 10.Qc2 dc4 11.Ng5 Re8+=; 8.Ne5 a6 (8...d5 9.c4 cb5 10.cb5 a6 11.ba6 Na6+=; 8...Qc7 9.c4 a6 10.ba6 Na6 11.Qb3 Rfb8+=) 9.a4 Qc7 10.c4 ab5 11.ab5 Ra1+=; 8.Na3 a6 (8...d5 9.c4 a6 10.cd5 cd5 11.Qb3 Nbd7=; 8...d6 9.c4 a6 10.bc6 Nc6 11.Qb3 Rc8=) 9.bc6 Nc6 10.Rb1 d5 11.c4 Rc8+=; 8.Nc3 d6 (8...a6 9.bc6 Nc6 10.e4 Qc7 11.Qe2 d6+=; 8...d5 9.a4 a6 10.Re1 Qc7 11.e4 cb5+=) 9.Rb1 a6 10.bc6 Nc6 11.Nd4 d5+=; 8.Nd4 d5 9.c4 a6 10.cd5 Nd5 11.ba6 Na6+=; 8.bc6 Nc6 9.c4 Rc8 10.Nc3 Re8 11.Rc1 a6+=) 8...Ne8 (8...d5 9.a4 a6 10.Na3 Qc7 11.Nf3 Nbd7+=; 8...a6 9.ba6 Na6 10.Nf3 d5 11.Ne5 Nc5+=) 9.bc6 Bc6 (9...Nc6 10.Nf3 d5 11.Na3 e5+=) 10.Bc6 (10.Nf3 d5 11.Nd4 Nd6+=) 10...dc6 (10...Nc6 11.Nf3 d5–/+) 11.Ng2 (11.Nf3 Nd6+=) 11...Nc7 (11...Bf6+=) 12.e4 c5 13.d4 Nd7 14.a4 Nf6 15.Re1. Wall,Bill – Pennell,Gary, corr, 1975.

6.Bg2 a6 7.c4 (7.a4 0–0 8.0–0 d5 9.Nc3 c6 10.Ne5+=) 7...ab5 (7...0–0 8.0–0 ab5 9.cb5 c5 10.bc6+=) 8.cb5 d5 (8...0–0 9.0–0 c5 10.Nc3+=) 9.d4 (9.0–0 c5 10.d4+=) 9...0–0 (9...c6 10.Nc3+=) 10.0–0 Ne4 11.a4 c5 12.e3 (12.Nbd2 Nd7=) 12...Nd7+= 13.Nc3 (13.Nbd2 f5+=) 13...Nd6 14.Nd2 cd4 15.ed4 Bf6 16.Qg4 Re8 17.Rfc1 Nf8 18.h4 (18.Ba3 Rc8=) 18...Ng6 19.h5 Ne7 20.Rc2 Nef5 21.Nf3 Nc4 (better is 21...Ne4–/+) 22.Bf1?? (22.Re1 Nb2 23.Rb2 Qd6–/+) 22...Nb2?? (better is 22...Nce3 23.fe3 Ne3–+) 23.Rb2+= Qe7 (23...Qd6 24.Rc2+=) 24.Bd3 Nd6 25.Ne5 (25.Rc2 Nc4+=) 25...Rec8 26.Ne2 (26.Rc2 Nc4 27.Bc4 dc4+=) 26...Be5–/+ 27.de5 Ne4 (27...Nc4!? 28.Bc4 Rc4–/+) 28.Be4= de4 29.h6 g6 30.Nf4 (30.Rd2 Rc5=) 30...Kf8 (30...Rc5!?+=) 31.Rd2= e3 (31...Rd8!? 32.Qd1 Qg5+=) 32.fe3+/– Rd8 33.Rd4 (33.Rf2!? Ke8 34.Nh3+/–) 33...Rd4+= 34.ed4 Rc8 (better is 34...Qb4 35.Ne2 Ra4+=) 35.Nh5?? (better is 35.Ne2+=) 35...Qb4–+ 36.Nf6?? (better is 36.Rd1 Qb3 37.Re1 gh5 38.Qg7 Ke7 39.Qg5 Kd7 40.Rf1–+) 36...Qb2 (36...Qb2 37.Nh7 Kg8 38.Nf6 Kh8–+) 0–1. Neuhof,KE – Ruotanen,A, corr ICCF EU/M/GT/055 (year?).

6.Bg2 d5 7.a4 (7.0–0 a6 8.ba6 Na6 9.c4 0–0 10.cd5+=; 7.Ne5 a6 8.0–0 ab5 9.Nc3 b4 10.Nb1–/+; 7.d3 a6 8.a4 c6 9.ba6 Ra6 10.0–0+=) 7...0–0 8.0–0 a6 9.Na3 c6 10.c4+=.

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!