[Event "USA-ch"]
[Site "Oberlin"]
[Date "1975.??.??"]
[Round "6"]
[White "Grefe, John Alan"]
[Black "Benko, Pal C"]
[Result "1-0"]
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