[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.06.08"]
[Round "15"]
[White "Larsen, Bent"]
[Black "Portisch, Lajos"]
[Result "1-0"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. exd5 exd5 5. Qf3 Nc6 6. Bb5 Ne7 7. Bf4 O-O 8. O-O-O Na5 9. Nge2 c6 10. Bd3 b5 11. h4 Nc4 12. h5 f6 13. g4 Qa5 14. Bxc4 dxc4 15. a3 Bxc3 16. Nxc3 Qd8 17. Rhe1 a5 18. Qg3 Ra7 19. h6 g6 20. Bd6 Re8 21. Qf4 Kf7 22. Be5 f5 23. Bb8 Rb7 24. Qe5 Rg8 25. g5 b4 26. Qf6+ Ke8 27. Qxc6+ Kf7 28. Qf6+ Ke8 29. d5 Rf8 30. Qc6+ Qd7 31. Bd6 Rf7 32. Bxe7 bxc3 33. Bb4+ 1-0