[Event "Candidates qf Petrosian-Portisch +3-2=8"]
[Site "Palma de Mallorca"]
[Date "1974.01.??"]
[Round "8"]
[White "Portisch, Lajos"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 g6 6. e4 Bg7 7. Be3 Ng4 8. Qxg4 Nxd4 9. Qd1 Ne6 10. Rc1 d6 11. Bd3 O-O 12. O-O a5 13. Bb1 Bd7 14. f4 Bc6 15. Qe2 b6 16. f5 Nc5 17. Qf2 Nd7 18. Qh4 Bf6 19. Qf2 Ne5 20. Qe2 Rb8 21. Nd5 Bxd5 22. cxd5 Qd7 23. b3 b5 24. Bd3 Nxd3 25. Qxd3 Rfc8 26. h3 Be5 27. Kh1 a4 28. Bh6 axb3 1/2-1/2