[Event "IBM"]
[Site "Amsterdam"]
[Date "1963.??.??"]
[Round "3"]
[White "Kuijpers, Frans"]
[Black "Portisch, Lajos"]
[Result "0-1"]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d3 Be6 10. Nbd2 Bxb3 11. Qxb3 Nd7 12. Qc2 g6 13. Nf1 f5 14. a4 fxe4 15. dxe4 Nc5 16. axb5 axb5 17. Be3 Rb8 18. Red1 Qc8 19. Bh6 Rf7 20. Ne3 Rxf3 21. gxf3 Qh3 22. Qd2 Ne6 23. Nd5 g5 24. Ra6 Rb6 25. Rxb6 cxb6 26. Nxe7+ Nxe7 27. Bxg5 Kf7 28. Qe3 Ng6 29. Rxd6 Ngf4 30. Bxf4 Nxf4 0-1