[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.07.29"]
[Round "13"]
[White "Portisch, Lajos"]
[Black "Gulko, Boris F"]
[Result "1-0"]
[WhiteElo "2625"]
[BlackElo "2530"]

1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 d6 6. Nge2 h5 7. h4 Nh6 8. d3 O-O 9. f3 Be6 10. Nd5 Kh7 11. Be3 f5 12. Qd2 Qd7 13. Rc1 Ne7 14. Ng1 c6 15. Nxe7 Qxe7 16. Nh3 Nf7 17. exf5 Bxf5 18. Nf2 Qd7 19. O-O d5 20. Qe2 Be6 21. Kh2 b6 22. b3 Rad8 23. Rcd1 Kg8 24. Nh3 Bf5 25. Rfe1 Qc7 26. Nf2 Bc8 27. Rc1 Be6 28. Bh3 Bxh3 29. Nxh3 Qd7 30. Rcd1 Qf5 31. Rf1 Qd7 32. Rg1 Qe7 33. Bc1 Rd7 34. Qc2 Qd6 35. Be3 Rfd8 36. c5 Qf6 37. cxb6 axb6 38. Bxb6 Rb8 39. Qf2 Nh6 40. Be3 Nf5 41. Rgf1 Bf8 42. Rc1 Ra8 43. Rc2 Ra6 44. Ng5 Bh6 45. Qe2 Bxg5 46. hxg5 Qe6 47. Bf2 Ra8 48. Rfc1 Rc7 49. Kg2 Qe7 50. Rxc6 Rxc6 51. Rxc6 Qxg5 52. Kh3 Ng7 53. Rd6 d4 54. Rd5 Re8 55. Kh2 Qf6 56. Kg2 h4 57. Qe4 Nh5 58. Bxd4 Qg5 59. Bxe5 hxg3 60. f4 Qg4 61. f5 Qg5 62. fxg6 Rf8 63. Rd8 Rxd8 64. Qc4+ Kf8 65. Qf7# 1-0