[Event "USA-ch/Zonal"]
[Site "South Bend"]
[Date "1981.??.??"]
[Round "9"]
[White "Lein, Anatoly"]
[Black "Christiansen, Larry Mark"]
[Result "1/2-1/2"]
[WhiteElo "2485"]
[BlackElo "2515"]

1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. e3 d5 5. d4 Nc6 6. Bd3 dxc4 7. Bxc4 cxd4 8. exd4 Be7 9. O-O O-O 10. a3 b6 11. Qd3 Bb7 12. Ba2 Rc8 13. Bg5 Nd5 14. Nxd5 Bxg5 15. Nc3 Bf6 16. Rad1 g6 17. Rfe1 Ne7 18. Ne5 Nd5 19. Ne4 Bg7 20. Qg3 Nf6 21. Nc3 Nd5 22. h4 Nxc3 23. bxc3 b5 24. h5 Bd5 25. Bb1 Qc7 26. hxg6 fxg6 27. Rd3 Rf5 28. Rde3 Bxe5 29. dxe5 Rf7 30. Rd1 Rcf8 31. Rd2 Qc5 32. Ba2 Bxa2 33. Rxa2 Qd5 34. Rae2 Qd1+ 35. Re1 Qb3 36. f3 Qxa3 37. c4 Qc5 38. cxb5 Qxb5 39. Re4 a5 40. Qf2 Rd7 41. Kh2 Qd5 42. Qc2 Kg7 43. Rc4 Qd2 44. Qxd2 Rxd2 45. Rc7+ Rf7 46. Rec1 g5 47. R7c6 1/2-1/2