[Event "USA-ch/Zonal"]
[Site "South Bend"]
[Date "1981.07.11"]
[Round "2"]
[White "Lein, Anatoly"]
[Black "Kogan, Boris Markovich"]
[Result "1/2-1/2"]
[WhiteElo "2485"]

1. d4 Nf6 2. Nf3 e6 3. g3 d5 4. Bg2 a6 5. O-O Be7 6. c4 O-O 7. Qc2 dxc4 8. a4 Bd7 9. Qxc4 Bc6 10. Bg5 Nbd7 11. Nc3 Nd5 12. Bxe7 Qxe7 13. Nxd5 exd5 14. Qc2 a5 15. e3 g6 16. Rfc1 Rfc8 17. Bh3 f5 18. Bg2 Qd6 19. b3 Nf6 20. Ne5 Bd7 21. Qc5 Qxc5 22. Rxc5 c6 23. Rac1 Be6 24. R5c2 Ra7 25. h3 Kf8 26. f3 Ke7 27. Kf2 Ne8 28. Bf1 Nd6 29. h4 Raa8 30. Bd3 Rg8 31. Rh1 Raf8 32. Kg2 Nf7 33. Nxf7 Rxf7 34. Rc5 Ra8 35. Rb1 Kd6 36. b4 b6 37. Rc3 axb4 38. Rxb4 Rb7 39. Rcb3 Kc7 40. Rb1 Raa7 41. Rc1 Ra5 42. Bb5 Bd7 43. e4 fxe4 44. fxe4 dxe4 45. d5 c5 46. Bxd7 Kxd7 47. Rxe4 Kd6 48. Rd1 Re7 49. Rf4 Kd7 50. Rb1 Kd6 51. Rd1 Kd7 52. Rb1 Kd6 53. Rd1 1/2-1/2