[Event "USA-ch"]
[Site "Oberlin"]
[Date "1975.??.??"]
[Round "11"]
[White "Byrne, Robert Eugene"]
[Black "Grefe, John Alan"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. c4 e5 7. Nc3 Nge7 8. d3 g6 9. Bg5 Bg7 10. Bxe7 Nxe7 11. a3 Bh6 12. b4 b6 13. bxc5 bxc5 14. Rb1 O-O 15. Qb3 f5 16. Qb7 Qe6 17. Rb5 Rae8 18. Rfb1 Nc8 19. Qd5 Qxd5 20. Nxd5 Ne7 21. Nxe7+ Rxe7 22. Rb7 Rxb7 23. Rxb7 Rf7 24. Rb1 fxe4 25. dxe4 Rc7 26. Kf1 Kf7 27. Ke2 Ke6 28. h4 Kd7 29. Kd3 Kc8 30. Kc2 Rf7 31. Rb3 Bf8 32. g3 Be7 33. Kd2 Bd8 34. Rd3 Be7 35. Ke2 Kc7 36. Rb3 Rf8 37. Ng5 Bxg5 38. hxg5 Rb8 39. Rxb8 Kxb8 40. f4 Kc7 41. f5 Kd7 42. Kd3 a5 1/2-1/2