[Event "Candidates qf Spassky-Portisch +1-1=12"]
[Site "Mexico City"]
[Date "1980.04.??"]
[Round "6"]
[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 e6 5. O-O Be7 6. Nc3 O-O 7. Re1 d5 8. cxd5 exd5 9. d4 Na6 10. Bg5 c6 11. Qa4 Nc7 12. Ne5 b5 13. Qb3 Ne6 14. Nf3 c5 15. Bxf6 Bxf6 16. dxc5 Rb8 17. Rad1 d4 18. e3 Nxc5 19. Qb4 Na6 20. Qb3 d3 21. Nd2 Bxg2 22. Kxg2 Nc5 23. Qb4 Qd6 24. Nb3 Qc6+ 25. e4 Nxb3 26. Qxb3 Bxc3 27. Qxc3 Qc4 28. Rxd3 Qxa2 29. Qa3 Qxa3 30. Rxa3 Rb7 31. Rea1 Re7 32. Kf3 f5 33. Rxa7 fxe4+ 34. Ke2 Rxa7 35. Rxa7 Rc8 36. Rd7 Rc4 37. Kd2 Rb4 38. Kc3 Rc4+ 39. Kb3 g6 40. Rd5 Rc1 41. Rd2 g5 42. Re2 Rh1 43. Kc3 Rxh2 44. Kd4 Kf7 45. Kxe4 Ke6 46. Rc2 b4 47. Rc6+ Kd7 48. Rf6 Ke7 49. Rf5 Ke6 50. Rf8 Ke7 51. Rf3 Ke6 52. Rf8 1/2-1/2