[Event "USA-ch/Zonal"]
[Site "South Bend"]
[Date "1981.??.??"]
[Round "6"]
[White "Kogan, Boris Markovich"]
[Black "Benjamin, Joel"]
[Result "0-1"]
[BlackElo "2400"]

1. Nf3 c5 2. c4 Nf6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d5 6. cxd5 Bc5 7. N5c3 O-O 8. e3 e4 9. Nd2 Bf5 10. g3 Nbd7 11. Bg2 Re8 12. O-O Rc8 13. h3 h5 14. b3 Bb4 15. Nb5 a6 16. Nd4 Bg6 17. Bb2 Ne5 18. a3 Bd6 19. Ne2 h4 20. Nf4 hxg3 21. fxg3 Bh7 22. Bd4 Bc5 23. Nc4 Nf3+ 24. Bxf3 exf3 25. Bxc5 Rxc5 26. Qd4 Rb5 27. Rxf3 Be4 28. Rf2 Nxd5 29. Rd1 Qg5 30. Kh2 Nf6 31. Nd6 Rd8 32. Qc4 Rxd6 33. Rxd6 Rc5 34. Rd8+ Kh7 35. Qxf7 Rc1 36. Ng2 Qxe3 37. Rdd2 Bc6 38. Rde2 Qh6 39. Rf4 Bd5 40. Qe7 Qxh3+ 41. Kxh3 Rh1# 0-1