[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1971.01.27"]
[Round "13"]
[White "Timman, Jan H"]
[Black "Kostro, Jerzy"]
[Result "1-0"]

1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. a3 a6 6. Rb1 Rb8 7. b4 cxb4 8. axb4 b5 9. cxb5 axb5 10. Nf3 Nh6 11. e4 f5 12. d4 fxe4 13. Nxe4 Nf5 14. d5 Ncd4 15. Nxd4 Nxd4 16. d6 Nf5 17. Bg5 Bf6 18. g4 Bxg5 19. gxf5 Bf6 20. Nxf6+ exf6 21. O-O O-O 22. Re1 Re8 23. Rxe8+ Qxe8 24. Qd2 Qe5 25. Re1 Qxf5 26. Bd5+ 1-0