[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.06.03"]
[Round "12"]
[White "Ivkov, Borislav"]
[Black "Rossetto, Hector"]
[Result "1/2-1/2"]

1. e4 Nc6 2. Nf3 e5 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. c3 Bd7 7. d4 Be7 8. Re1 O-O 9. a3 b5 10. Bc2 Bg4 11. d5 Na5 12. Nbd2 c5 13. b4 Nb7 14. h3 Bd7 15. Nf1 Qc7 16. Bd2 Rfc8 17. Ne3 a5 18. Kh2 Ra7 19. Rc1 axb4 20. axb4 c4 21. g4 g6 22. Rg1 Kh8 23. Ng5 Nd8 24. h4 Ng8 25. Qf3 f6 26. Nh3 Nf7 27. Ra1 Rca8 28. Qh1 Ra2 29. Rxa2 Rxa2 30. Ra1 Qa7 31. Rxa2 Qxa2 32. Qb1 1/2-1/2