(1) Chumachenko,Andrey (2447) - Giannatos,Peter (2044) [A59]
Land of the Sky 2009 (1), 23.01.2009
[Rybka 3 (90s)]

A59: Benko/Volga Gambit: White castles by hand

1.d4 Nf6 2.c4
[2.Nf3 e6= ]

2...c5 3.d5
White wins space

3...b5
[3...g6 4.Nd2= ]

4.cxb5+/= a6 5.bxa6 g6 6.Nc3 Bxa6 7.Nf3 Bg7 8.e4 Bxf1 9.Kxf1 d6
Covers e5

10.g3 0-0 11.Kg2
White king safety dropped

11...Nbd7 12.Qe2 Nb6
White has an active position [12...Rb8 13.h3+/= ]

13.a4
White has a new backward pawn: b2. Black has a cramped position

13...Qc8 14.a5 Qa6 15.Qxa6
[15.axb6 is much weaker 15...Qxe2 (15...Qxa1?! 16.e5 dxe5 17.Nxe5=/+ ) 16.Rxa8 Qc2-/+ ]

15...Rxa6 16.Ra2
[16.axb6? is a blank shot 16...Rxa1 17.Bg5 Rxh1 18.Kxh1 Rb8-+ ]

16...Nc4?
[>=16...Nbd7!? 17.Bg5 h6+/- ]

17.Ra4+- Ne5 18.Nxe5 dxe5 19.Be3 Nd7 20.Rb1 Rc8?
[>=20...f5+- ]

21.b4 cxb4 22.Na2 Rca8
[22...Raa8 23.a6 f5 24.exf5 gxf5 25.Nxb4+- ]

23.Nxb4 Rxa5 24.Rxa5 Rxa5 25.Nc6 Ra8 26.Rb7 Nf6 27.Nxe7+ Kf8 28.f3
[>=28.Nc6!? makes it even easier for White 28...Nxe4 29.d6 Nxd6+- ]

28...Ke8 29.Nc6 Nd7 30.f4 f6 31.Ra7 Rxa7 32.Bxa7
[Less advisable is 32.Nxa7 f5 33.exf5 gxf5+/- ]

32...Bf8 33.fxe5 fxe5 34.Bb8
[34.Kf3 Bd6+- ]

34...Nxb8 35.Nxb8 Bd6
[35...Bb4 36.Nc6 Bc3 37.Kf3+- ]

36.Nc6 Kf7?
[>=36...Bc7+- ]

37.Kf3 Kf6 38.h3
[38.Ke3!? and White can already relax 38...g5 39.Kd3 Kf7+- ]

38...h5
[38...Bc5 39.Ke2 h5 40.Kd3+- ]

39.Nd8
[39.Ke3 keeps an even firmer grip 39...Bc5+ 40.Kd3 Bf2+- ]

39...Bb4
[39...Ke7 40.Ne6+- ]

40.Ne6
[>=40.Ke2+- ]

40...g5??
terrible, but the game is lost in any case [>=40...Ba5+- ]

41.g4 h4 42.Ke3 Be7 43.Kd3 Kf7 44.Kc4 Ke8 45.Nc5 Bd6
[45...Kd8+- otherwise it's curtains at once]

46.Nb7 Ba3 47.d6 Kd7
[47...Bb2 is one last hope 48.Nc5 Ba3+- ]

48.Kd5 Bb2 49.Nc5+
[49.Nc5+ Ke8 50.Ke6+- ] 1-0