[Event "WchT U26 01 prel-3"]
[Site "Mexico City"]
[Date "1978.08.21"]
[Round "1"]
[White "West, Guy"]
[Black "Christiansen, Larry Mark"]
[Result "0-1"]
[BlackElo "2490"]

1. e4 c5 2. f4 Nc6 3. Nf3 g6 4. Bb5 Bg7 5. O-O Nf6 6. d3 O-O 7. Nc3 Nd4 8. Bc4 d6 9. Nxd4 cxd4 10. Ne2 d5 11. exd5 Nxd5 12. Ng3 e6 13. Qf3 Nb4 14. Bb3 Bd7 15. Qxb7 a5 16. Qf3 a4 17. Bc4 Nxc2 18. Rb1 Qb6 19. Qe2 Ne3 20. Bxe3 dxe3 21. Kh1 Bc6 22. b3 axb3 23. axb3 Ra3 24. Rfe1 Bd4 25. Nf1 Qc7 26. Nxe3 Qxf4 27. b4 Rc3 28. Nc2 Bb6 29. Rf1 Qh4 30. Ne1 Bc7 31. Nf3 Qh5 32. b5 Bb7 33. Rb2 Rd8 34. b6 Bb8 35. Rb5 Qh6 36. Re5 Bxf3 37. gxf3 Bxe5 38. Qxe5 Qh3 39. Qe2 Rc2 40. Bxe6 fxe6 0-1