[Event "IBM"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "6"]
[White "Byrne, Robert Eugene"]
[Black "Liberzon, Vladimir Mikhailovi"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qc7 5. Nc3 e6 6. g3 a6 7. Bg2 Nf6 8. O-O Be7 9. Be3 d6 10. Qe2 Bd7 11. Rad1 Rc8 12. f4 b5 13. a3 O-O 14. Kh1 Nxd4 15. Bxd4 e5 16. Be3 Be6 17. Rfe1 Bc4 18. Qd2 a5 19. Rc1 b4 20. axb4 axb4 21. Nd5 Nxd5 22. exd5 exf4 23. Bxf4 1/2-1/2