[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.08.02"]
[Round "16"]
[White "Gulko, Boris F"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2530"]
[BlackElo "2505"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O cxd4 8. exd4 dxc4 9. Bxc4 b6 10. Bf4 Bb7 11. Qe2 Bxc3 12. bxc3 Nd5 13. Bd2 Qc7 14. Rfe1 Nd7 15. Bb5 N7f6 16. Rac1 a6 17. Bd3 Nf4 18. Bxf4 Qxf4 19. Ne5 Qg5 20. g3 Nd5 21. Qe4 f5 22. Qf3 Qe7 23. Qe2 Rac8 24. c4 Nb4 25. Bb1 Qd6 26. Rcd1 Rf6 27. Qb2 Rxc4 28. Nxc4 Qd5 29. f3 Qxc4 30. Rc1 Qb5 31. a3 Nc6 32. Qxb5 axb5 33. Rcd1 Na5 34. Ba2 Nc4 35. a4 Bxf3 36. axb5 Bxd1 37. Bxc4 Bc2 38. Bxe6+ Kf8 39. d5 Bb3 40. Rc1 Ba4 41. Rc8+ Ke7 42. Rc7+ Kd6 43. Rxg7 h6 44. Rb7 Kc5 45. Rc7+ Kd4 46. Rc6 Bxb5 47. Rxb6 Bc4 48. Rc6 Rf8 49. Kf2 Bxd5 50. Bxd5 Kxd5 51. Rxh6 Ra8 1/2-1/2