[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.06.17"]
[Round "21"]
[White "Smyslov, Vassily V"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]

1. Nf3 d5 2. c4 e6 3. g3 dxc4 4. Qa4+ Bd7 5. Qxc4 c5 6. Ne5 Nc6 7. Nxd7 Qxd7 8. Bg2 Nf6 9. d3 Rc8 10. Nd2 Be7 11. Nf3 O-O 12. O-O b6 13. Bd2 Nd5 14. a3 Rfd8 15. Rac1 Bf6 16. Rc2 Nde7 17. Bh3 Nd4 18. Nxd4 cxd4 19. Qb3 Rxc2 20. Qxc2 Rc8 21. Qb3 h6 22. Bg2 Bg5 23. f4 Bf6 24. Rc1 Rxc1+ 25. Bxc1 Nd5 26. Qc4 Ne3 27. Qc6 Qxc6 28. Bxc6 e5 29. fxe5 Bxe5 30. Kf2 Ng4+ 1/2-1/2