[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.06.10"]
[Round "16"]
[White "Portisch, Lajos"]
[Black "Porat, Yosef"]
[Result "1-0"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7 11. Bd3 cxd4 12. exd4 Bc6 13. Ne5 Rd8 14. Be3 Nbd7 15. Nxc6 bxc6 16. Ne4 Rac8 17. Ba6 Rb8 18. b4 Bc7 19. Qxc6 Nd5 20. Bg5 f6 21. Bh4 Rb6 22. Qc4 Nb8 23. Bb5 Rc8 24. Nc5 Nc3 25. Qxc3 Rxb5 26. Rfe1 Rb6 27. Qb3 Re8 28. Rxe6 Rxe6 29. Re1 Be5 30. Rxe5 1-0