[Event "Interzonal-09a"]
[Site "Leningrad"]
[Date "1973.06.16"]
[Round "10"]
[White "Radulov, Ivan"]
[Black "Estevez Morales, Guillermo"]
[Result "1-0"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Be2 O-O 8. O-O d6 9. Qd2 Ng4 10. Bxg4 Bxg4 11. f4 Nxd4 12. Bxd4 e5 13. Be3 exf4 14. Rxf4 Be6 15. Rf2 Qa5 16. Bd4 Be5 17. Bxe5 Qxe5 18. Rd1 Rfd8 19. Qd4 Qxd4 20. Rxd4 Rd7 21. Rfd2 Rad8 22. b3 a6 23. Kf2 b5 24. a4 Rc7 25. Na2 Rdc8 26. axb5 axb5 27. Nb4 f5 28. Rxd6 Kf7 29. Rb6 Rc5 30. Rdd6 Re5 31. Rdc6 Rd8 32. Rc7+ Rd7 33. Rxd7+ Bxd7 34. Rb7 Ke8 35. Nd3 Rxe4 36. Rxd7 Kxd7 37. Nc5+ Kd6 38. Nxe4+ fxe4 39. Ke3 Ke5 40. c4 b4 41. g3 1-0