[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1975.01.14"]
[Round "1"]
[White "Portisch, Lajos"]
[Black "Ree, Hans"]
[Result "1-0"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Ne4 Nxe4 10. Bxe4 Bb7 11. Qa4 Qb6 12. Nd2 Rc8 13. a3 bxa3 14. Nc4 Qa6 15. Qb3 Qb5 16. Qxb5 cxb5 17. Bxb7 Rc7 18. Nxa3 Rxb7 19. Bd2 Bxa3 20. Rxa3 Nb6 21. b3 Kd7 22. Ke2 Rc8 23. Rha1 Rcc7 24. Kd3 Nc8 25. Bb4 f5 26. f3 Rc6 27. Bc5 e5 28. R3a2 Rbc7 29. Ra5 Rg6 30. R1a2 exd4 31. exd4 Re6 32. Rxb5 Re1 33. Rba5 Rd1+ 34. Ke2 Rb1 35. b4 Rc6 36. d5 Rg6 37. Ke3 Rd1 38. Bxa7 Ne7 39. Bd4 Nc8 40. f4 1-0