[Event "47th US Open"] [Site "Pittsburgh, PA"] [Round "2"] [White "Gerald Katz"] [Black "Olaf Ulvestad"] [Result "0-1"] [ECO "D23"] [Opening "QGA: Mannheim, 4...Nc6"] 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Qa4+ Nc6 5.g3 a6 6.Qxc4 Be6 7.Qa4 Bd5 8.Bg2 b5 9.Qd1 e5 10.Nc3 Bb4 11.O-O Bxc3 12.bxc3 e4 13.Nh4 O-O 14.Nf5 Qd7 15.Ne3 Be6 16.f3 Bh3 17.fxe4 Bxg2 18.Kxg2 Nxe4 19.Qd3 Rfe8 20.Nf5 Qd5 21.Kg1 Ne7 22.Nxe7+ Rxe7 23.Ba3 Re6 24.Rf4 Rae8 25.Qf3 f6 26.Bb4 Qc4 27.Qd3 Qxd3 28.exd3 Ng5 29.Kg2 Re2+ 30.Rf2 R2e3 31.h4 Nf7 32.Rf3 Nh6 33.a4 Ng4 34.Rxe3 Nxe3+ 35.Kf3 Nd5 36.axb5 axb5 37.Ra5 Re3+ 38.Kf2 Rxd3 39.Rxb5 Nxc3 40.Bxc3 Rxc3 41.Rd5 Kf7 42.Rd7+ Kg6 43.g4 h5 44.gxh5+ Kh6 45.Kg2 Rc6 46.Kg3 Rd6 47.Rxc7 Rxd4 48.Rc5 Re4 49.Ra5 Re5 50.Rxe5 fxe5 51.Kg4 e4 52.Kf4 Kxh5 53.Kxe4 Kxh4 54.Kf4 g5+ 55.Kf3 Kh3 56.Kf2 g4 57.Kg1 Kg3 58.Kh1 Kf2 {#R} 0-1