[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1975.01.21"]
[Round "7"]
[White "Portisch, Lajos"]
[Black "Donner, Jan Hein"]
[Result "1-0"]
1. c4 Nf6 2. Nc3 g6 3. d4 Bg7 4. e4 O-O 5. Be3 d6 6. f3 e5 7. d5 c6 8. Bd3 cxd5 9. cxd5 Ne8 10. Qd2 f5 11. exf5 gxf5 12. Nge2 Nd7 13. O-O Nc5 14. Bc2 a5 15. f4 exf4 16. Nxf4 Be5 17. Rae1 Qf6 18. Nh3 b6 19. Bg5 Qg6 20. Bf4 Bf6 21. Rf3 Kh8 22. Rg3 Qh5 23. Bd1 Qh4 24. Ng5 Ne4 25. Ngxe4 fxe4 26. Nxe4 1-0