[Event "IBM"]
[Site "Amsterdam"]
[Date "1968.??.??"]
[Round "7"]
[White "Lengyel, Levente"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 d6 8. O-O Nbd7 9. Nc3 Ne4 10. Nxe4 Bxe4 11. Ne1 Bxg2 12. Nxg2 O-O 13. e4 e5 14. Ne3 Re8 15. f3 a5 16. Nd5 exd4 17. Qxd4 Nc5 18. Nf4 Ne6 1/2-1/2