[Event "USA-ch"]
[Site "Estes Park"]
[Date "1987.??.??"]
[Round "4"]
[White "Christiansen, Larry Mark"]
[Black "Gulko, Boris F"]
[Result "1/2-1/2"]
[WhiteElo "2575"]
[BlackElo "2565"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. d5 Na5 10. Bb5+ Bd7 11. Qa4 b6 12. O-O a6 13. Bxd7+ Qxd7 14. Qc2 O-O 15. Bg5 Nc4 16. a4 e5 17. Qb3 b5 18. Ng3 h6 19. Bc1 h5 20. f3 Rfb8 21. Nh1 Na5 22. Qd1 b4 23. cxb4 cxb4 24. Nf2 b3 25. Nd3 Qa7+ 26. Kh1 Rc8 27. Rb1 Rab8 28. f4 Qd4 29. fxe5 Qxe4 30. d6 Rc3 31. Rf3 Nc4 32. Bg5 Qd4 33. Nc5 Qxd1+ 34. Rxd1 Rxf3 35. gxf3 b2 1/2-1/2