[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1975.01.30"]
[Round "14"]
[White "Portisch, Lajos"]
[Black "Geller, Efim P"]
[Result "1/2-1/2"]
1. c4 g6 2. d4 Bg7 3. Nf3 d6 4. g3 c5 5. d5 Nf6 6. Bg2 b5 7. cxb5 Qa5+ 8. Nfd2 Qxb5 9. O-O Ba6 10. Re1 Nbd7 11. Na3 Qb4 12. Nc2 Qa5 13. Ne3 O-O 14. Ndc4 Qc7 15. Bd2 Rfb8 16. Rc1 Bc8 17. Ba5 Nb6 18. b4 Nfd7 19. a3 Ba6 20. Nd2 Qb7 21. Ne4 cxb4 22. axb4 Rc8 23. Qd2 Bb5 24. Nc3 Bxc3 25. Rxc3 Rxc3 26. Qxc3 Rc8 27. Qa1 Nc4 28. Nxc4 Rxc4 29. Rc1 Qc8 30. Rxc4 Qxc4 31. e4 1/2-1/2