[Event "USA-ch"]
[Site "El Paso"]
[Date "1973.??.??"]
[Round "13"]
[White "Benko, Pal C"]
[Black "Grefe, John A"]
[Result "0-1"]
[WhiteElo "2530"]
[BlackElo "2200"]
[ECO "A15"]

1.Nf3 Nf6 2.c4 g6 3.b4 Bg7 4.Bb2 O-O 5.e3 d6 6.d3 e5 7.Nbd2 Nh5 8.Qc2 f5
9.Be2 Qe8 10.Nb3 Nc6 11.a3 Bd7 12.Bc3 h6 13.Nfd2 Nd8 14.Qb2 Qe7 15.Nf3 Nf6
16.Nfd2 Nf7 17.O-O g5 18.Rae1 Kh7 19.f4 Rae8 20.Qa1 Bh8 21.Kh1 Rg8 22.fxe5 dxe5
23.d4 e4 24.d5 g4 25.Nc5 Bc8 26.Ndb3 Nh5 27.Bxh8 Nxh8 28.Ne6 Bxe6 29.dxe6 Rg5
30.Nd4 Rf8 31.Rd1 Ng7 32.c5 Ng6 33.Kg1 Nh4 34.g3 Nf3+ 35.Bxf3 gxf3 36.Qa2 c6
37.Kf2 Re8 38.Rd2 Nxe6 39.Nxe6 Qxe6 40.Qxe6 Rxe6 41.Rfd1 Rg7 42.Rd8 b6 43.Rc1 Rb7
44.h3 bxc5 45.Rxc5 Rb5 46.Rc1 Rd5 47.Rxc6 Rxc6 48.Rxd5 Rc2+ 49.Kf1 Kg6 50.Ra5 Re2
51.g4 fxg4 52.hxg4 Rxe3 53.Re5 Kf6 54.Ra5 Ke6 55.a4 Rb3 56.Kf2 Rb2+ 57.Ke3 Re2+
58.Kd4 f2  0-1

