[Event "Interzonal-11b"]
[Site "Rio de Janeiro"]
[Date "1979.10.11"]
[Round "14"]
[White "Timman, Jan H"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo "2625"]
[BlackElo "2525"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 c5 5. a3 Bxd2+ 6. Bxd2 cxd4 7. Nxd4 Nc6 8. Bc3 O-O 9. Qc2 d5 10. e3 Bd7 11. Nf3 Ne4 12. cxd5 exd5 13. Bd3 Nxc3 14. Qxc3 Rc8 15. O-O Bg4 16. Nd4 Qb6 17. h3 Nxd4 18. Qxd4 Qxd4 19. exd4 Bd7 20. Rac1 Rxc1 21. Rxc1 Rc8 22. Rc5 Be6 23. Kh2 b6 24. Rxc8+ Bxc8 25. Kg3 f6 26. h4 h6 27. Bg6 Kf8 28. Kf4 Ke7 29. g4 Bd7 30. g5 hxg5+ 31. hxg5 Ba4 32. Bh5 Bc2 33. Bf3 Ke6 34. Bg4+ Ke7 35. Bf5 Ba4 36. Bh3 Bc2 37. Bg2 Ke6 38. gxf6 gxf6 39. Bh3+ Ke7 40. Bc8 Bd3 41. Kg4 Be2+ 42. Kh4 Bd1 43. Bg4 Bc2 44. Kh5 Be4 45. Kh6 1/2-1/2