[Event "Interzonal-13c"]
[Site "Biel"]
[Date "1985.07.08"]
[Round "6"]
[White "Polugaevsky, Lev"]
[Black "Petursson, Margeir"]
[Result "1/2-1/2"]
[WhiteElo "2600"]
[BlackElo "2550"]

1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. g3 Nf6 6. Bg2 Be7 7. O-O O-O 8. Nc3 Nc6 9. Bg5 cxd4 10. Nxd4 Re8 11. Rc1 h6 12. Bf4 Bg4 13. h3 Be6 14. Ncb5 Nh5 15. Be3 Qd7 16. Nxe6 fxe6 17. g4 Nf6 18. f4 Rac8 19. Nxa7 Nxa7 20. Bxa7 Qb5 21. Rxc8 Rxc8 22. Bd4 Bc5 23. e3 Ne4 24. Bxe4 dxe4 25. Qc2 Qd3 26. Rf2 Bxd4 27. Qxc8+ Kh7 28. exd4 e3 29. Qc3 exf2+ 30. Kxf2 Qb1 31. a4 Qh1 32. Qd3+ Kh8 33. f5 Qh2+ 34. Kf1 exf5 35. gxf5 Qh1+ 36. Ke2 Qg2+ 37. Kd1 Qxb2 38. d5 Qa1+ 39. Ke2 Qe5+ 40. Kf3 Qd6 41. Qe4 Qh2 42. Qe8+ Kh7 43. Qg6+ Kh8 44. d6 Qh1+ 45. Ke3 Qe1+ 46. Kd4 Qd2+ 47. Ke5 Qe2+ 48. Kd5 Qa2+ 49. Kc5 Qf2+ 50. Kb5 Qb2+ 51. Kc4 Qc2+ 52. Kd4 Qd2+ 53. Ke4 Qe2+ 54. Kf4 Qf2+ 55. Ke5 Qe2+ 56. Kd5 Qa2+ 57. Kc5 Qf2+ 58. Kb5 Qb2+ 59. Ka5 Qd4 60. Qe8+ Kh7 61. Qg6+ Kh8 62. Qe8+ Kh7 63. f6 Qc5+ 64. Qb5 Qxd6 65. Qb1+ Kg8 66. Qb3+ Kh7 67. Qb1+ Kg8 68. Qb3+ Kh7 69. Qc2+ g6 70. Qc8 Qa6+ 71. Kb4 Qb6+ 72. Kc4 Qa6+ 73. Kb4 Qb6+ 74. Kc4 Qa6+ 75. Kd5 Qd3+ 76. Ke5 Qg3+ 77. Ke4 Qg2+ 1/2-1/2