[Event "USA-ch"]
[Site "Oberlin"]
[Date "1975.??.??"]
[Round "4"]
[White "Commons, Kim S"]
[Black "Byrne, Robert Eugene"]
[Result "1/2-1/2"]

1. c4 Nf6 2. Nf3 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. d4 Nc6 8. d5 Na5 9. Nd2 e5 10. b3 Ne8 11. e4 f5 12. exf5 gxf5 13. Bb2 Nf6 14. Qc2 b6 15. Rfe1 Bd7 16. f4 e4 17. Nd1 Rf7 18. Ne3 h5 19. h4 Nh7 20. Kh2 Bd4 21. Bc3 Qf6 22. Nb1 Rg7 23. Bh3 Nf8 24. Qd2 Ng6 25. Nc2 Bxc3 26. Qxc3 Qe7 27. Ne3 Rf8 28. Nd2 Kh7 29. Nxf5 Bxf5 30. Bxf5 Rxf5 31. Nxe4 Kh6 32. Nxc5 Qf7 33. Ne6 Rg8 34. Ng5 Qd7 35. Re6 Nb7 36. Ne4 Rgf8 37. Qb4 Nc5 38. Nxd6 Nxe6 39. Nxf5+ Rxf5 40. dxe6 Qxe6 41. Re1 Qd7 42. Qc3 Nf8 43. b4 Nh7 44. c5 bxc5 45. bxc5 Rxc5 46. Qxc5 Qd2+ 47. Kh3 Qxe1 48. Qd6+ Kg7 49. Qe5+ Qxe5 50. fxe5 Nf8 51. g4 Ng6 52. gxh5 Nxe5 53. Kg3 Nd3 54. Kf3 Nb4 55. a3 Nc2 56. a4 Nd4+ 57. Ke4 Nb3 58. Kd5 1/2-1/2