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

1. Nf3 Nf6 2. c4 e6 3. Nc3 b6 4. e4 Bb7 5. d3 d6 6. g3 g6 7. Bg2 Bg7 8. O-O c5 9. Re1 O-O 10. d4 cxd4 11. Nxd4 Nbd7 12. b3 a6 13. Bb2 Qc7 14. Re2 Rad8 15. Qe1 Qb8 16. Rd1 Nc5 17. f3 Rfe8 18. Kh1 1/2-1/2