[Event "Bugojno"]
[Site "Bugojno"]
[Date "1978.03.04"]
[Round "6"]
[White "Portisch, Lajos"]
[Black "Spassky, Boris Vasilievich"]
[Result "1/2-1/2"]
[WhiteElo "2630"]
[BlackElo "2630"]

1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 e6 5. Bg2 d5 6. cxd5 Nxd5 7. O-O Be7 8. d4 O-O 9. Nxd5 exd5 10. dxc5 Bxc5 11. a3 Bf5 12. b4 Bb6 13. Ra2 Be4 14. Rd2 Qe7 15. Bb2 Rfe8 16. Qa1 f6 17. Rfd1 Qe6 18. Qa2 Rad8 19. Qb3 a5 20. Ne1 axb4 21. axb4 d4 22. Qxe6+ Rxe6 23. Bxe4 Rxe4 24. Nd3 Rd5 25. Ra1 Re8 26. Ra4 Kf7 27. Kf1 Ne5 28. Rc2 Nxd3 29. exd3 g5 30. Ra1 h5 31. Rc4 Rdd8 32. Ra4 Re5 33. h3 h4 34. gxh4 gxh4 35. b5 Red5 36. Rab4 Kg6 37. Kg2 Rg5+ 38. Kf1 Rgd5 39. Kg2 Rg5+ 40. Kf1 1/2-1/2