[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1971.01.12"]
[Round "1"]
[White "Lengyel, Levente"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 d6 6. a3 Bxc3+ 7. Qxc3 Qe7 8. b4 e5 9. dxe5 Nxe5 10. Nxe5 Qxe5 11. Qxe5+ dxe5 12. e3 O-O 13. Be2 Be6 14. Bb2 Nd7 15. c5 f6 16. O-O Rfd8 17. Rfd1 Nf8 18. Kf1 Bb3 19. Rxd8 Rxd8 20. Ke1 Ne6 1/2-1/2