[Event "Candidates qf Spassky-Portisch +1-1=12"]
[Site "Mexico City"]
[Date "1980.04.??"]
[Round "10"]
[White "Portisch, Lajos"]
[Black "Spassky, Boris Vasilievich"]
[Result "1/2-1/2"]
[WhiteElo "2655"]
[BlackElo "2615"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. Rc1 Bb7 9. Be2 dxc4 10. Bxc4 Ne4 11. Bxe7 Qxe7 12. Nxe4 Bxe4 13. O-O Rd8 14. Be2 c5 15. Nd2 Bd5 16. dxc5 bxc5 17. Qc2 Nd7 18. a3 Rab8 19. Bf3 Ne5 20. e4 Bc6 21. Be2 Bb5 22. Bxb5 Rxb5 23. Rfd1 Qf6 24. Rb1 Rdb8 25. b3 Qe7 26. Qc3 Nc6 27. b4 a5 28. bxc5 Qxc5 29. Qxc5 Rxc5 30. Rxb8+ Nxb8 31. Nb3 Rb5 32. Nd4 Rc5 1/2-1/2