[Event "Interzonal-11b"]
[Site "Rio de Janeiro"]
[Date "1979.10.03"]
[Round "9"]
[White "Huebner, Robert"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo "2595"]
[BlackElo "2525"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. O-O O-O 6. d4 dxc4 7. Qc2 a6 8. a4 Nc6 9. Qxc4 Qd5 10. Nbd2 Rd8 11. e3 Qxc4 12. Nxc4 Bd7 13. b3 Be8 14. Bb2 b5 15. Nce5 bxa4 16. Nxc6 Bxc6 17. bxa4 Rab8 18. Ba3 Bxa3 19. Rxa3 Rb4 20. a5 Rb2 21. Rc1 Bb5 22. Ne5 c5 23. dxc5 Rdd2 24. c6 Rxf2 25. Bh3 Rfc2 26. Rc3 Rxc3 27. Rxc3 Rb1+ 28. Kg2 1/2-1/2