[Event "USA-ch"]
[Site "Chicago"]
[Date "1974.??.??"]
[Round "5"]
[White "Grefe, John Alan"]
[Black "Weinstein, Norman"]
[Result "1-0"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 Bg4 10. Be3 exd4 11. cxd4 Na5 12. Bc2 Nc4 13. Bc1 c5 14. b3 Na5 15. d5 Nd7 16. Nbd2 Bf6 17. Rb1 Bc3 18. Re3 b4 19. h3 Bxf3 20. Nxf3 g6 21. Bb2 Bxb2 22. Rxb2 Qf6 23. Rb1 Ne5 24. Nh2 c4 25. Rg3 Rac8 26. Qd2 cxb3 27. axb3 Nb7 28. Rf1 a5 29. Bb1 Nd7 30. Ng4 Qe7 31. f4 Qh4 32. Kh2 Nbc5 33. e5 f5 34. exf6 Nxf6 35. Nxf6+ Qxf6 36. f5 Rc7 37. fxg6 Qxf1 38. gxh7+ Kf7 39. Rf3+ Qxf3 40. gxf3 Rcc8 41. Qh6 1-0