[Event "Candidates qf Spassky-Portisch +1-1=12"]
[Site "Mexico City"]
[Date "1980.04.??"]
[Round "8"]
[White "Portisch, Lajos"]
[Black "Spassky, Boris Vasilievich"]
[Result "1/2-1/2"]
[WhiteElo "2655"]
[BlackElo "2615"]

1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 g6 5. O-O Bg7 6. d4 e6 7. Nc3 Ne4 8. Nxe4 Bxe4 9. Bg5 f6 10. Be3 O-O 11. Qd2 Nc6 12. Rfd1 d5 13. Rac1 Ne7 14. cxd5 exd5 15. Bh6 Qd7 16. Bxg7 Kxg7 17. Ne1 Bxg2 18. Nxg2 c6 19. Rc3 Rac8 20. Rdc1 Nf5 21. e3 g5 22. Qc2 Ne7 23. b4 Qh3 24. f3 Rfd8 25. Qf2 Rd6 26. b5 Qe6 27. Qc2 Rd7 28. a4 Rdc7 29. e4 Rd8 30. Re1 Rdc8 31. Ne3 Kf8 32. Rc1 c5 33. exd5 Nxd5 34. Nxd5 Qxd5 35. Qe4 Qd6 36. dxc5 bxc5 37. Rd3 Qe7 38. Qc4 Rd8 39. Rxd8+ Qxd8 40. a5 Re7 1/2-1/2