[Event "Interzonal-09a"]
[Site "Leningrad"]
[Date "1973.06.21"]
[Round "13"]
[White "Estevez Morales, Guillermo"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1-0"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. O-O-O Be7 10. Rhe1 O-O 11. Kb1 Qa5 12. Qd2 Kh8 13. Nd4 Rac8 14. f3 Rfd8 15. g4 a6 16. h4 b5 17. Bxf6 Bxf6 18. g5 Bxd4 19. Qxd4 b4 20. Ne2 Ba4 21. b3 Bb5 22. Nc1 Qc7 23. Rd2 a5 24. Red1 d5 25. f4 Qxf4 26. exd5 Qxd4 27. Rxd4 e5 28. Re4 f6 29. a3 Be8 30. axb4 Bg6 31. Rc4 axb4 32. Kb2 e4 33. Na2 f5 34. Nxb4 f4 35. Rxc8 Rxc8 36. d6 e3 37. d7 Rd8 38. Nc6 e2 39. Ra1 Rf8 40. d8=Q Rxd8 41. Nxd8 f3 42. Ne6 Kg8 43. Nd4 1-0