[Event "USA-ch"]
[Site "Oberlin"]
[Date "1975.??.??"]
[Round "6"]
[White "Grefe, John A"]
[Black "Benko, Pal C"]
[Result "1-0"]
[WhiteElo "2470"]
[BlackElo "2515"]
[ECO "B85"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 a6 7.O-O Qc7 8.f4 Be7
9.a4 Nc6 10.Be3 O-O 11.Kh1 Bd7 12.Nb3 b6 13.Bf3 Rfd8 14.g4 Be8 15.g5 Nd7
16.Bg2 Nc5 17.Rf3 Rab8 18.Rh3 g6 19.Qg4 b5 20.axb5 axb5 21.Qh4 h5 22.Bf3 Bf8
23.f5 Nxb3 24.f6  1-0

