[Event "USA-ch"]
[Site "Estes Park"]
[Date "1985.??.??"]
[Round "2"]
[White "Wolff, Patrick G"]
[Black "Kogan, Boris Markovich"]
[Result "1/2-1/2"]
[WhiteElo "2305"]
[BlackElo "2500"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Ne5 Bd6 7. Nd2 O-O 8. Nxe4 dxe4 9. Nc4 Nc6 10. Nxd6 cxd6 11. Be3 d5 12. Qd2 a5 13. O-O-O b5 14. f3 exf3 15. Kb1 Bf5 16. Bd3 Qd7 17. Bxf5 Qxf5 18. Rhf1 Rac8 19. Rxf3 Qe4 20. a3 b4 21. Bh6 f6 22. Re3 Qf5 23. Rf3 Qd7 24. Rg3 Rf7 25. Bf4 Re7 26. Re3 Rxe3 27. Bxe3 bxa3 28. bxa3 a4 29. Ka2 Na7 30. Qd3 Nb5 31. Bd2 Rc4 32. Bb4 Rxd4 33. Qf3 Qc6 34. Kb2 Rxd1 35. Qxd1 d4 36. Qe2 h6 37. g3 Nc7 38. Qg4 Ne6 39. Qf5 Ng5 40. Qa5 Nf3 41. h4 Kh7 42. Qf5+ Kg8 43. Qa5 h5 44. Qxh5 Ne5 45. Qf5 Kf7 46. Qh5+ Ke6 47. Qe2 Kf5 48. Qh5+ Ke6 49. Qe2 Qd7 50. Qe4 Kf7 51. h5 d3 52. cxd3 Nxd3+ 53. Kc3 Ne5 54. Bc5 Qd1 55. Qb7+ Ke6 56. Qc8+ Nd7 57. Qe8+ Kf5 58. Qg6+ Ke5 59. Qe8+ Kf5 60. Qg6+ 1/2-1/2