[Event "Interzonal-13c"]
[Site "Biel"]
[Date "1985.07.14"]
[Round "9"]
[White "Petursson, Margeir"]
[Black "Sax, Gyula"]
[Result "0-1"]
[WhiteElo "2550"]
[BlackElo "2535"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c5 7. dxc5 dxc5 8. Qxd8 Rxd8 9. Bxc5 Nc6 10. Nd5 Nd7 11. Ba3 e6 12. Nc7 Rb8 13. O-O-O b6 14. Ne2 Bb7 15. Bd6 Nc5 16. Nb5 Rbc8 17. Nec3 a6 18. Na3 f5 19. exf5 gxf5 20. Kb1 Nd4 21. Be7 Rd7 22. Bh4 e5 23. Bf2 Rcd8 24. Bh4 Nb5 25. cxb5 Rxd1+ 26. Nxd1 Rxd1+ 27. Kc2 Rd6 28. Be7 Rg6 29. Bxc5 bxc5 30. bxa6 Bxa6 31. Bxa6 Rxa6 32. Rd1 e4 33. fxe4 fxe4 34. Re1 Ra4 35. Re3 Kf7 36. Nb5 Ke6 37. a3 Kf5 38. g3 Bd4 39. Re2 Ra6 40. Kb3 e3 41. Kc4 Ke4 42. b4 Rc6 43. Na7 Ra6 44. Nb5 Rc6 45. Na7 Rf6 46. Nb5 Rf2 47. Re1 Rc2+ 48. Kb3 Kd3 49. bxc5 Rb2+ 50. Ka4 Bxc5 51. Rd1+ Rd2 52. Rc1 Rc2 53. Rd1+ Kc4 54. Rd8 e2 55. Re8 Bf2 56. Rc8+ Kd3 57. Rd8+ Ke3 58. Nd4 Rc4+ 0-1