[Event "USA-ch/Zonal"]
[Site "South Bend"]
[Date "1981.07.11"]
[Round "2"]
[White "Christiansen, Larry Mark"]
[Black "Shamkovich, Leonid Alexandrovic"]
[Result "1/2-1/2"]
[WhiteElo "2515"]
[BlackElo "2495"]

1. c4 Nf6 2. Nc3 c6 3. e4 d5 4. cxd5 cxd5 5. exd5 Nxd5 6. Nf3 Nc6 7. d4 Bg4 8. Qb3 Bxf3 9. gxf3 e6 10. Qxb7 Nxd4 11. Bb5+ Nxb5 12. Qc6+ Ke7 13. Qxb5 Nxc3 14. bxc3 f6 15. Ba3+ Kf7 16. Rd1 Qc8 17. Rd7+ Kg8 18. Bxf8 Qxc3+ 19. Ke2 Rxf8 20. Rhd1 h5 21. Rd8 Qa3 22. R1d7 Rh6 23. Rxf8+ Qxf8 24. Qd3 Qc5 25. Rd8+ Kf7 26. f4 f5 27. Qd7+ Qe7 28. Qd4 Kg6 29. Rd7 Qf6 30. Qxf6+ Kxf6 31. Rxa7 Rh8 32. a4 Rd8 33. h4 Rd4 34. Ke3 Re4+ 35. Kf3 Rd4 36. a5 Rd5 37. a6 Rd6 38. Ra8 Kg6 39. Ke3 Kf7 40. Ke2 Kg6 41. a7 Ra6 1/2-1/2