[Event "Interzonal-12b"]
[Site "Toluca"]
[Date "1982.08.20"]
[Round "7"]
[White "Nunn, John DM"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[WhiteElo "2590"]
[BlackElo "2630"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Nb3 Nc6 10. Bxf6 gxf6 11. Be2 d5 12. Na4 Qa3 13. Nb6 d4 14. O-O Rb8 15. Nc4 Qb4 16. Qd1 b5 17. Ncd2 Bg7 18. Rf3 e5 19. Qe1 exf4 20. Rxf4 Qd6 21. Rh4 O-O 22. Qf2 Ne5 23. Rf1 Rd8 24. h3 Be6 25. Rh5 d3 26. cxd3 Nxd3 27. Bxd3 Qxd3 28. Qf4 Rbc8 29. Nf3 Rc2 30. Ne1 Qe2 31. Nxc2 Qxh5 32. Ncd4 Bc4 33. Qc7 Re8 34. Rf3 Qe5 35. Qd7 Rf8 36. Nf5 Be6 37. Qc6 Rd8 38. Nbd4 Bf8 39. Rg3+ Kh8 40. Nf3 Qc5+ 41. Qxc5 Bxc5+ 42. Kf1 Bxa2 43. e5 Be6 44. Nh6 Be3 0-1