(1) Shankland,Sam (2512) - Onischuk,Alexander (2678) [E25]
US Championship Playoff St Louis USA, 29.04.2011

This was a second game of a 2-game rapid match used as a tiebreaker to see who would get the coveted spot in the semifinals. After holding an easy draw with black in game 1, I was feeling particularly ambitious.

1.d4 Nf6 2.c4 e6 3.Nc3
Hopefully a surprise, I only played this move once before.

3...Bb4 4.f3
And I've never played this move before! However, my opponent did not flinch as he had clearly done his homework on this highly topical line.

4...d5 5.a3 Bxc3+ 6.bxc3 c5 7.cxd5 Nxd5 8.dxc5 Qa5 9.e4
Deviating from his previous games where he played Ne7, perhaps because of the Nd4 novelty in the Anand-Wang Hao game.

9...Nf6 10.Be3 0-0 11.Qb3 Nfd7 12.a4 Qc7 13.Qa3 b6 14.a5 Bb7! 15.Ne2N
the first independant move of the game

15...Nxc5?!
In my notes I gave bxc5 as best

16.Nd4+/=
White has an edge due to his bishop pair, slightly more central control, and the annoying pressure on the black queenside, although the long-term structural weaknesses on the c4 and c5 squares cannot be overlooked.

16...Nbd7 17.Be2 Ba6 18.Bxa6
Trading the bishops felt to be more in the spirit of the position than the ugly 18. c4, but the latter was not bad either. [18.c4!? Ne5 (18...f5!? 19.exf5 exf5 20.0-0+/= ) 19.0-0 Rac8 (19...Bxc4 20.axb6 Qxb6 21.Rfb1 Qc7 22.Rc1+- ) 20.axb6 axb6 21.Nxe6 fxe6 22.Bxc5 Qxc5+ 23.Qxc5 Rxc5 24.Rxa6 Nxc4 25.Bxc4 Rxc4 26.Rxb6+/- Black should hold a draw in this endgame, but it will be anything but pleasant, particularly in a rapid game]

18...Nxa6 19.0-0 Qc8?!
Intending Ne5-c4, but it seems awfully passive [19...Ne5? 20.Bf4+/- ; 19...Rfc8 May be the best 20.Nb5 Qc6 21.Rfb1+/= ]

20.Nb5!
Looking to penetrate into d6 and putting pressure on the a7 pawn. [20.Rfd1 Ne5 21.axb6 axb6= Black puts a knight on c4 and solves his problems]

20...Nac5 21.Qb4
[21.Rfd1 The most natural move fails to bxa5 21...bxa5 22.Nd6 (22.Qxa5? Nb3-/+ ) 22...Qc6= ]

21...Nd3?
Black starts an aggressive operation that is of dubious objective value

22.Qd4 N7c5 23.Rfb1?
And here I let him off the hook. After the correct 23. e5! intending on installing my knight on d6, white has a clear advantage. [23.e5 Qc6 24.Nd6 f6 (24...Rfd8 25.c4! Controlling the b2 square to threaten Rfd1 (25.f4 Rab8 White's position looks nice, but he has no plan.; 25.Rfd1 Nb2 The dual threats of Nxd1 and Nb3 are hard to meet) 25...Nxe5 (25...Rab8 26.Rfd1 ) 26.axb6 axb6 (26...Rxd6 27.Qxc5+- ) 27.Rxa8 Rxa8 (27...Qxa8 28.Qxe5 ) 28.Qxe5 ) 25.exf6 Rxf6 26.axb6 axb6 (26...Qxb6 27.Qxd3 ) 27.Rxa8+ Qxa8 28.Ne4 Nxe4 29.Qxd3+/- ]

23...Rd8 24.Qc4 a6 25.axb6[]
White sacrifices a piece for active play and a dangerous passed bpawn [25.Na7? Rxa7 26.axb6 Rad7!-/+ (26...Rb7?? 27.Ra5+- ; 26...Ra8 27.b7 Nxb7 28.Qxc8 Raxc8 29.Rxb7 Rxc3 30.Rxa6= ) ; 25.Nd4?? b5 26.Qa2 Na4 White is strategically lost]

25...axb5 26.Qxb5 Rxa1 27.Rxa1 Nb7 28.Bd4 e5
[28...Nf4 29.g3 Ng6 30.Ra7© ; 28...Ndc5 29.Ra7© ]

29.Qxd3 exd4 30.cxd4=
Oddly enough, this dynamic sequence has led to an equal position

30...Rd6 31.Rb1 Rc6?!
Not a terrible move, but a step in the wrong direction. Black was overestimating his position and thought he could play for an advantage. [31...Qd8 32.Qa6 Rxd4 33.Qxb7 Rd1+ 34.Rxd1 Qxd1+ 35.Kf2 Qd2+ 36.Kg3 Qg5+= ]

32.Qe3 Rc3 33.Qf4 h6 34.h4 Rc2 35.d5 Qc5+ 36.Kh2 Qf2 37.Qb8+ Kh7 38.Qg3 Qd4 39.Qf4
Black is unable to make progress without trading queens, but as we will see that is a very risky decision to make.

39...Kg8 40.Qb8+ Kh7 41.Qf4 f6
[41...Kg8 42.Qb8+= ]

42.h5 Qe5? 43.Qxe5+/-
Black must have badly misjudged this endgame

43...fxe5 44.Kh3 g6 45.Ra1! Rb2 46.Rc1
[46.Ra7! Was even stronger 46...Rxb6 47.d6 Kg7 48.hxg6 Kxg6 49.d7 Nd8 50.Ra8 Nf7 51.d8Q Nxd8 52.Rxd8+/- /+- Black will face a very long struggle to make a draw, and likely an unsuccessful one.]

46...Rxb6 47.Rc7+ Kg8 48.hxg6 Na5 49.Rc5 Nb3??
The black knight is going in the wrong direction [49...Nb7[] 50.Rc8+ (50.Rc6 Rxc6 51.dxc6 Nd6 52.Kg4 Kg7 53.Kh5 Ne8= ) 50...Kg7 51.Rb8 Rb5 52.Re8+/- Leads to a position similar to the game. Black is in trouble, but still breathing.]

50.Rc6 Rb7
[50...Rb8 51.Kh4 Nd4 52.Rc7 Rb1 (52...Ra8 53.Kh5 ) 53.Rc8+ Kg7 54.d6 ]

51.Re6??
White repays the favor- the ensuing time scramble was riddled with errors, but even after this error with the white pawns rolling down the board black faced a very difficult defense. [51.d6!+- Rd7 (51...Nd4 52.Rc8+ Kg7 53.Rc7+ ) 52.Rc8+ Kg7 53.Rc7 Nc5 54.Rxc5 Rxd6 55.Rxe5 With an easily won game]

51...Nd4 52.Rxe5+/- Kg7 53.Re8 Kxg6 54.f4 Rb3+ 55.Kh4 Rd3 56.d6 Ne2 57.f5+ Kf7 58.Re7+ Kf6 59.Re6+ Kf7 60.Rxh6 Rd4 61.Re6 Nf4?
The final nail in black's coffin [61...Nc3 62.d7 Rxd7 (62...Nxe4 63.d8Q Rxd8 64.Rxe4+- ) 63.g4 Black still has some chances to hold on]

62.Re7+ Kf8
[62...Kf6 63.Kg4 Nxg2 (63...Rxd6 64.e5+ ) 64.Re6+ Kf7 65.Kg5+- ]

63.Kg5 Nd3
[63...Rxd6 Would have prolonged the suffering, but not for long 64.e5 (64.Ra7 Nxg2 65.e5 Rb6 66.e6 Ne3 67.Kf6 (67.e7+ Kf7= ) 67...Ng4+ ) 64...Ra6 (64...Rd2 65.Ra7 Nd5 66.g4+- ) 65.Rh7 Nxg2 (65...Nd5 66.g4 ) 66.e6 Ne3 (66...Ke8 67.Kf6 Kd8 68.Rd7+ Ke8 (68...Kc8 69.Kf7 ) 69.Rg7 ) 67.e7+ Ke8 68.f6 ]

64.e5 Nf4 65.g4 Nd5 66.Ra7 Ne3 67.Kf6 Nxg4+ 68.Ke6 Re4 69.d7 Rxe5+ 70.Kd6
Despite a few obvious mistakes from both sides (it was a rapid game after all) I was very happy with my play and of course thrilled to beat such a powerful player as GM Onischuk to make it into the Semifinals. 1-0