[Event "USA-ch/Zonal"]
[Site "South Bend"]
[Date "1981.??.??"]
[Round "5"]
[White "Kogan, Boris Markovich"]
[Black "Christiansen, Larry Mark"]
[Result "1/2-1/2"]
[BlackElo "2515"]

1. d4 g6 2. g3 Bg7 3. Bg2 d6 4. Nf3 Nf6 5. O-O O-O 6. c4 Nbd7 7. Nc3 e5 8. h3 Re8 9. e4 a6 10. Re1 Rb8 11. d5 b5 12. cxb5 axb5 13. b4 Nb6 14. Bg5 Bd7 15. Nd2 h6 16. Be3 Nh7 17. h4 f5 18. h5 f4 19. Bxb6 Rxb6 20. hxg6 Ng5 21. Qh5 Rf8 22. Nf3 Nxf3+ 23. Bxf3 Qf6 24. Rf1 Be8 25. Qg4 Kh8 26. Kg2 Bxg6 27. Qe6 Qg5 28. Qg4 Qxg4 29. Bxg4 c5 30. Rab1 c4 31. Bd7 f3+ 32. Kh3 h5 33. Bxb5 Bh6 34. Rb2 h4 35. Bd7 hxg3 36. fxg3 Be3 37. Bf5 Bxf5+ 38. exf5 Bd4 39. Rc2 Rxf5 40. Kg4 Rf7 41. Rxf3 Rg7+ 42. Kh3 Rxb4 43. Rf6 Rd7 44. Kg4 e4 45. Rf8+ Kg7 46. Rc8 e3 47. a3 Rb3 48. Rxc4 Bxc3 49. R2xc3 e2 50. Rc1 Re7 51. Re1 Rxa3 52. Kh3 Ree3 53. Rg4+ Kf6 54. Kg2 Kf5 55. Rg8 Ke4 56. Kf2 Kd3 57. Rb8 Kd4 58. Rxe2 Rf3+ 59. Ke1 Ra1+ 60. Kd2 Rxg3 61. Kc2 Rgg1 62. Rd2+ Kc5 63. Rc8+ Kb6 64. Rc6+ Kb5 65. Kd3 Rad1 1/2-1/2