[Event "USA-ch/Zonal"]
[Site "South Bend"]
[Date "1981.??.??"]
[Round "9"]
[White "Kogan, Boris Markovich"]
[Black "Tarjan, James Edward"]
[Result "1/2-1/2"]
[BlackElo "2530"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Nd2 c6 7. Qxc4 e5 8. dxe5 Nxe5 9. Qc3 Bd6 10. Ngf3 Qe7 11. O-O O-O 12. Nxe5 Bxe5 13. Qc2 Re8 14. Re1 Be6 15. Nf3 Bc7 16. e4 Bb6 17. Be3 Bxe3 18. Rxe3 Rad8 19. a3 Qd7 20. Rae1 h6 21. Bf1 Qc7 22. Rd3 Bg4 23. Nh4 Rxd3 24. Bxd3 Qe5 25. Re3 Rd8 26. Kg2 Be6 27. h3 Qd4 28. Nf3 Qd7 29. Ng1 Qd4 30. Ne2 Qb6 31. Nf4 Bb3 32. Qc3 a5 33. Bb1 a4 34. Rd3 Kf8 35. f3 Rxd3 36. Nxd3 Nd7 37. Nc1 f6 38. f4 Ke7 39. Ne2 c5 40. g4 Be6 41. Bc2 Qc6 42. Kf2 g5 43. Qe3 Qb5 44. e5 Qxb2 45. exf6+ Kxf6 46. Qd3 Ke7 47. Bxa4 gxf4 48. Bxd7 Bxd7 49. Qe4+ Be6 50. a4 b6 51. Qb7+ Kf6 52. a5 Qe5 53. Qxb6 Qe3+ 54. Kf1 f3 55. Ng3 Kg5 56. Qd8+ Kg6 57. Qe8+ Kh7 1/2-1/2