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

1. c4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 e6 5. d4 Be7 6. Nc3 Ne4 7. Bd2 c5 8. O-O O-O 9. Rc1 Bf6 10. Nxe4 Bxe4 11. Bc3 Nc6 12. e3 cxd4 13. Nxd4 Bxg2 14. Kxg2 Bxd4 15. Bxd4 d5 16. b3 e5 17. Bb2 d4 18. Qf3 Qd6 1/2-1/2