[Event "USA op"]
[Site "Chicago"]
[Date "1973.??.??"]
[Round "1"]
[White "Diesen, Bark"]
[Black "Browne, Walter S"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B93"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 Nbd7 7.Bd3 e5 8.Nf3 b5
9.O-O g6 10.Qe1 Bg7 11.Qh4 Bb7 12.fxe5 dxe5 13.Bh6 O-O 14.Ng5 Nh5 15.Bxg7 Qb6+
16.Kh1 Kxg7 17.Nxh7 Kxh7 18.g4 Nf6 19.gxh5 Nxh5 20.Be2 Qd8 21.Qxd8 Raxd8
22.Bxh5 gxh5 23.Rf5 Kh6 24.Raf1 b4 25.Nd5 Bxd5 26.exd5 Rxd5 27.Rxf7 Rxf7
28.Rxf7 Kg5 29.Kg2 e4 30.Kf1 Rc5 31.Rf2 e3 32.Rf3 Rxc2 33.Rxe3 Rxb2 34.Re5+ Kf4
35.Ra5 Kf3 36.Rf5+ Ke4 37.Rxh5 Rxa2 38.Rh4+ Kf3 39.Ke1 a5 40.Kd1 Ke3 41.Kc1 Kd3
42.Rh8 Kc3 43.Rb8 Kb3 44.h4 Rh2  0-1

