[Event "USA op"]
[Site "?"]
[Date "1972.??.??"]
[Round "3"]
[White "Browne, Walter S"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B05"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 e6 6.c4 Nb6 7.exd6 cxd6 8.h3 Bxf3
9.Bxf3 d5 10.c5 Nc4 11.Nd2 Nxd2 12.Bxd2 Be7 13.b4 O-O 14.O-O Nc6 15.Bc3 Bf6
16.b5 Ne7 17.a4 Qc7 18.Re1 b6 19.c6 Nf5 20.Qd3 Nd6 21.Qc2 Rfc8 22.Be2 Ne8
23.Bd3 g6 24.Qd2 Qd8 25.Qe3 Nc7 26.a5 Be7 27.Ra2 Qf8 28.Qd2 Bf6 29.Rea1 Be7
30.Ra4 Bd6 31.Bb4 Bxb4 32.Rxb4 Qd8 33.Rba4 Rcb8 34.Qf4 a6 35.axb6 Rxb6 36.bxa6 Rxc6
37.a7 Rb6 38.h4 Qe7 39.h5 Ne8 40.h6 Rb7 41.Qe5 f6 42.Qg3 Qd6 43.Qg4 f5 44.Qg5 Qe7
45.Qe3 Kf7 46.Qe5 Qf6 47.Qf4 Qe7 48.Qe5 Qf6 49.Qf4 Qe7 50.Qe5 Qf6  1/2-1/2

