Tommy Bartell (FIDE 2427) - Christopher Matthew De Sa (FIDE 2200), U.S. Open 7/31/2007
1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d5 6.cxd5 Nxd5 7.O-O Nc6 8.e4 Nb6 9.d5 Nb8 10.Nc3 c6 11.Re1 h6
White's 11th move was uncommon. Usually White plays 11.Nd4. Black's last move prevents 12.Bg5.
12.Bf4 g5 13.Be5 f6 14.Bxb8 Rxb8 15.Nd4 c5 16.Nb3 Nd7 17.Bh3 b5 18.Be6+ Kh8 19.Rc1 Qb6 20.Kg2 f5
This position is slightly better for White.
21.exf5 c4 22.d6 Qxd6 23.Qxd6 exd6 24.Na5 Ne5 25.Nd5 Bxe6 26.fxe6 Nd3 27.e7 Rfe8 28.b3 c3 29.Red1 Nxc1 30.Rxc1 Kg8
Up an exchange, Black has a winning position.
31.b4 Rec8 32.Rc2 Kf7 33.Kf3 Ke6 34.Ke4 g4 35.e8=Q+ Rxe8 36.Nc7+ Kd7 37.Nxe8 Rxe8+ 38.Kd3 Rf8
A pawn ahead, Black still has a winning position.
39.Nb3 Rf5 40.Re2 Rd5+ 41.Ke4 Rd1 42.Kf5 Rb1 43.Kxg4 Rb2 44.Kf3 h5 45.Ke3 d5 46.Kd3 Rxe2 47.Kxe2 Ke6 48.Kd3 d4 49.Ke4 Kd6 50.a3 Ke7 51.f4 Kd6
Black has misplayed a won game into an inferior position. He should have swapped rooks by 41...Re5+. Even 42...h5 was still winning for Black.
52.h3 h4 53.g4 c2 54.g5 d3 55.Kxd3 Kd5 56.Kxc2 Ke4 57.Nc5+ Kf3 58.f5 Kg3 59.f6 Bh8 60.f7, Black resigns.
