[Event "Interzonal-13c"]
[Site "Biel"]
[Date "1985.07.03"]
[Round "2"]
[White "Petursson, Margeir"]
[Black "Jansa, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo "2550"]
[BlackElo "2480"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Rb1 O-O 9. Be2 Nc6 10. d5 Bxc3+ 11. Bd2 Bxd2+ 12. Qxd2 Na5 13. O-O Bg4 14. e5 Bxf3 15. Bxf3 Nc6 16. Qe3 Nd4 17. Rxb7 Qa5 18. e6 fxe6 19. Bg4 Qxa2 20. Bxe6+ Nxe6 21. Qxe6+ Rf7 22. Rxe7 Rf8 23. h4 Qc4 24. Rxa7 Qd4 25. Rc7 c4 26. d6 c3 27. Qb3 Qxd6 28. Rxf7 Rxf7 29. Qxc3 Qf6 30. Qc4 Qf4 31. Qc8+ Kg7 32. g3 Qf5 33. Qc3+ Qf6 34. Qd3 Re7 35. Rc1 Qe5 36. Qd8 Qf6 37. Qd2 Qe5 38. Rd1 Qf6 39. Qd3 Rf7 40. Qe3 Re7 41. Qc5 h5 42. Rd5 Kh7 43. Rd6 Qe5 44. Qb6 Qe1+ 45. Kg2 Qe4+ 46. Kh2 Rf7 47. Qb2 Qe1 48. Rd2 Qe6 49. Re2 Qf6 50. Qa2 Kg7 51. Rd2 Qe5 52. Qc4 Rc7 53. Qd3 Rf7 54. Re2 Qf5 55. Qd2 Qf6 56. Qe1 Qd4 57. Re3 Qf6 58. Kg1 Qd4 59. Re4 Qf6 60. Qe3 Qf3 61. Qd4+ Kh7 62. Re8 Qf6 63. Qd2 Kg7 64. Rd8 Qa1+ 65. Kg2 Qf6 66. Rd6 Qf3+ 67. Kg1 Kh7 68. Rd3 Qf6 69. Re3 Qa1+ 70. Kg2 Qf6 71. Qe2 Qc6+ 72. Kg1 Qf6 73. Re4 Qf3 74. Qe3 Qd1+ 75. Kh2 Qf3 76. Rf4 Rxf4 77. gxf4 Qg4 78. Qe7+ Kg8 79. Qf6 Qf5 80. Qe5 Kf7 81. f3 Qc2+ 82. Kg3 Qb1 83. Qd5+ Kf6 84. Qd4+ Kf7 85. Qc4+ Kf6 86. Kf2 Qb2+ 87. Ke3 Qb1 88. Qc6+ Kf7 89. Qd5+ Kf6 1/2-1/2