[Event "Linares 06th"]
[Site "Linares"]
[Date "1988.02.27"]
[Round "4"]
[White "Portisch, Lajos"]
[Black "Nunn, John DM"]
[Result "1/2-1/2"]
[WhiteElo "2610"]
[BlackElo "2615"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Nbd7 7. Qd2 c6 8. Nf3 d5 9. exd5 cxd5 10. O-O Ne4 11. Nxe4 dxe4 12. Ne1 f6 13. Be3 e5 14. Rd1 exd4 15. Bxd4 Qe7 16. Nc2 f5 17. Bxg7 Qxg7 18. Nd4 Ne5 19. Qa5 Kh8 20. Qd5 Qf6 21. c5 Rd8 22. Qb3 f4 23. Rfe1 Bg4 24. Bxg4 Nxg4 25. Rxe4 Qh4 26. Qf3 Qxh2+ 27. Kf1 Qh5 28. Kg1 Qh2+ 29. Kf1 Qh5 30. Kg1 1/2-1/2