[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.06.11"]
[Round "17"]
[White "Bronstein, David Ionovich"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. b4 e6 3. a3 b6 4. g3 Bb7 5. Bg2 c5 6. bxc5 bxc5 7. c4 Nc6 8. O-O Be7 9. Nc3 O-O 10. d3 Rb8 11. Bf4 d6 12. Rb1 Ba8 13. Qa4 Qd7 14. Bg5 h6 15. Bxf6 Bxf6 16. Ne4 Bb2 17. Rfd1 f5 18. Ned2 Ne5 19. Qa5 Nc6 20. Qa4 Ne5 21. Qa5 Nc6 22. Qa4 Ne5 1/2-1/2