[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.05.28"]
[Round "7"]
[White "Darga, Klaus"]
[Black "Perez Perez, Francisco Jose"]
[Result "1/2-1/2"]

1. Nf3 d6 2. d4 Bg4 3. e4 g6 4. Bc4 Nf6 5. h3 Bxf3 6. Qxf3 Nc6 7. Qb3 e6 8. d5 Na5 9. Qa4+ c6 10. dxe6 Nxe4 11. exf7+ Kd7 12. Bd3 Nc5 13. Qg4+ Kc7 14. Bd2 b6 15. O-O Bg7 16. Nc3 Qd7 17. Rae1 Nxd3 18. cxd3 Raf8 19. Nd5+ cxd5 20. Rc1+ Nc6 21. Rxc6+ Qxc6 22. Rc1 Qxc1+ 23. Bxc1 Rxf7 24. Qe6 Rhf8 25. Qxd5 Rxf2 26. Qc4+ Kb8 27. d4 d5 28. Qc3 Kb7 29. Be3 Rf1+ 30. Kh2 1/2-1/2