[Event "Hoogovens"]
[Site "Beverwijk"]
[Date "1964.01.18"]
[Round "9"]
[White "Portisch, Lajos"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Nxe4 Bxe4 9. Ne1 Bxg2 10. Nxg2 d5 11. Qa4 c5 12. dxc5 Bxc5 13. cxd5 Qxd5 14. Rd1 Qc6 15. Qxc6 Nxc6 16. Be3 Bxe3 17. Nxe3 Rfd8 18. Kf1 Kf8 19. Ke1 Ke7 20. Rxd8 Rxd8 21. Rc1 Nd4 22. Rc7+ Rd7 23. Rc8 Rd8 24. Rc7+ Rd7 25. Rc8 Rd8 26. Rc7+ Rd7 1/2-1/2