[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.05.22"]
[Round "3"]
[White "Ivkov, Borislav"]
[Black "Perez Perez, Francisco Jose"]
[Result "1-0"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Bb3 Be7 8. Be3 O-O 9. f4 e5 10. Nf3 Ng4 11. Bd2 exf4 12. Bxf4 Bh4+ 13. Nxh4 Qxh4+ 14. Bg3 Qh6 15. Nd5 Be6 16. O-O Bxd5 17. Bf4 Qg6 18. Bxd5 Nge5 19. Qd2 Ne7 20. Bb3 Rad8 21. Rad1 N7c6 22. Bd5 Kh8 23. Qc3 h6 24. Qa3 f6 25. Qg3 Qxg3 26. Bxg3 Nb4 27. Bb3 Rfe8 28. h3 Rc8 29. c3 Na6 30. Rxd6 Nc5 31. Bd5 b6 32. b4 Na4 33. Bxe5 Rxe5 34. c4 Nc3 35. Rd7 Nxd5 36. cxd5 Rxe4 37. Rf2 Rc1+ 38. Kh2 h5 39. g3 h4 40. gxh4 Ree1 41. Rg2 Rh1+ 42. Kg3 Rc3+ 43. Kg4 Rhxh3 44. Kf5 Rhf3+ 45. Ke6 Rce3+ 46. Kf7 Rg3 47. Rxg3 Rxg3 48. Rxa7 f5 49. d6 Rd3 50. d7 Kh7 51. Ke6 1-0