[Event "Interzonal-11b"]
[Site "Rio de Janeiro"]
[Date "1979.10.08"]
[Round "12"]
[White "Sax, Gyula"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo "2590"]
[BlackElo "2525"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 dxc6 7. Nc3 Bg4 8. h3 Bh5 9. g4 Bg6 10. Qe2 Nd7 11. d4 exd4 12. Nxd4 h5 13. Nf5 hxg4 14. hxg4 Bd6 15. f4 Bxf5 16. exf5+ Kf8 17. g5 Nc5 18. b4 Qd7 19. bxc5 Bxc5+ 20. Be3 Qxf5 21. Ne4 Bxe3+ 22. Qxe3 Qh7 23. Kf2 Qh2+ 24. Ke1 Re8 25. Qa3+ Kg8 26. Qe3 Kf8 27. Qa3+ Kg8 28. Qe3 Kf8 1/2-1/2