[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1975.01.24"]
[Round "9"]
[White "Portisch, Lajos"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. Qa4+ Nc6 8. cxd5 exd5 9. e3 O-O 10. Be2 Be6 11. O-O a6 12. Rfc1 Bd6 13. Qd1 Rae8 14. Na4 Nd8 15. Nc5 Bc8 16. Nd3 Ne6 17. Nfe5 c5 18. Ng4 Qe7 19. dxc5 Nxc5 20. Nxc5 Bxc5 21. Qxd5 Bd6 22. Qh5 Be6 23. h3 f5 24. Nh2 Bf7 25. Qxf5 Be6 26. Qg6 Rf6 27. Qe4 Bxh2+ 28. Kxh2 Rxf2 29. Bd3 Qd6+ 30. Kh1 Rf5 31. Rf1 Ref8 32. Rf4 Rxf4 33. Qh7+ Kf7 34. exf4 Bd5 35. Be2 Qg6 36. Qxg6+ Kxg6 37. Rd1 Bxa2 38. Rd6+ Kf5 39. g3 Ke4 40. Kg2 Ke3 1/2-1/2