[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1975.01.19"]
[Round "5"]
[White "Portisch, Lajos"]
[Black "Kuijpers, Frans"]
[Result "1-0"]

1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. O-O Bxc3 7. bxc3 d6 8. d3 Kh8 9. Rb1 Ng8 10. Ne1 Nge7 11. Nc2 f5 12. f4 Qe8 13. e3 Rb8 14. Nb4 Bd7 15. Nd5 Nxd5 16. cxd5 Ne7 17. fxe5 dxe5 18. c4 b6 19. Rb2 Ng6 20. Rbf2 Qe7 21. Qb3 b5 22. cxb5 Rxb5 23. Qc3 Rc8 24. e4 fxe4 25. Ba3 Qe8 26. Bxe4 Rbb8 27. Bxg6 1-0