[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.06.15"]
[Round "19"]
[White "Perez Perez, Francisco Jose"]
[Black "Benko, Pal C"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 g6 5. Nbd2 d5 6. Bg2 Bg7 7. O-O Nge7 8. Re1 O-O 9. c3 b6 10. e5 Qc7 11. Qe2 Ba6 12. h4 Kh8 13. Nf1 Ng8 14. N1h2 Rae8 15. Bf4 Qd8 16. Ng4 h5 17. Ngh2 f5 18. Qd2 d4 19. c4 b5 20. b3 bxc4 21. dxc4 Bb7 22. Re2 a5 23. Ne1 Qb6 24. Nd3 Nb4 25. Bxb7 Nxd3 26. Qxd3 Qxb7 27. Nf3 Ne7 28. Ne1 Nc6 29. Qf3 Rf7 30. Nd3 Nd8 31. Qxb7 Nxb7 32. a4 Bf8 33. Bd2 Kg8 34. f4 Ra8 35. Be1 Nd8 36. Rb1 Rb7 37. Kg2 Nc6 38. Kf3 Rab8 39. Reb2 1/2-1/2