[Event "Olympiad-17 Preliminaries A"]
[Site "Havana"]
[Date "1966.10.29"]
[Round "4"]
[White "Perez Gonsalves, Eduardo"]
[Black "Kostjoerin, Anatole"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2 Nxc3 9. bxc3 f5 10. d5 Na6 11. Nd4 Nc5 12. Rd1 Qc8 13. Ba3 Rb8 14. f3 g6 15. e4 fxe4 16. fxe4 e5 17. Nb3 d6 18. Bc1 Bf6 19. Rf1 Qd7 20. Nxc5 dxc5 21. a4 a5 22. Rb1 Qe7 1/2-1/2