[Event "Interzonal-09a"]
[Site "Leningrad"]
[Date "1973.06.03"]
[Round "1"]
[White "Estevez Morales, Guillermo"]
[Black "Karpov, Anatoly"]
[Result "0-1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6 7. Bh4 b6 8. Be2 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. b4 c6 12. O-O a5 13. a3 Qd6 14. Qb3 axb4 15. axb4 Nd7 16. Rfd1 Rxa1 17. Rxa1 Be7 18. Ra7 Rb8 19. Na2 Bc8 20. Qc2 Bf6 21. Nc1 Nf8 22. Nd3 Bf5 23. Qa4 Nd7 24. Ra8 Rxa8 25. Qxa8+ Kh7 26. Qa6 g6 27. Qb7 Kg7 28. h3 h5 29. Qa7 Bd8 30. Qb7 Qc7 31. Qa8 Be7 32. Nde5 Bxb4 33. Qxc6 Qxc6 34. Nxc6 Bd6 35. Bb5 Nf6 36. Nd2 Ne8 37. f3 Nc7 38. Be2 Bc2 39. Kf2 Ba4 40. Ne5 b5 41. Nd3 h4 42. Nb2 Bb4 43. Nb1 Bb3 44. Bd3 Bc4 45. e4 g5 46. exd5 Bxd5 47. Nd1 Bc6 48. Nbc3 Bd7 49. Ne4 Be7 50. Nc5 Bxc5 51. dxc5 Ne6 52. Nc3 b4 53. Ne4 b3 54. Nd2 Nxc5 55. Bb1 Kf6 56. Ke3 0-1