[Event "Candidates qf Kortschnoj-Petrosian +2-1"]
[Site "Ciocco"]
[Date "1977.??.??"]
[Round "4"]
[White "Petrosian, Tigran V"]
[Black "Kortschnoj, Viktor Lvovich"]
[Result "1/2-1/2"]
[WhiteElo "2645"]
[BlackElo "2645"]

1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 Nc6 12. O-O Qd6 13. Rfd1 Rd8 14. Rac1 Bd7 15. e5 Qe7 16. Qf4 Be8 17. h4 Rac8 18. d5 exd5 19. Rxd5 h6 20. Rcd1 Rxd5 21. Rxd5 Rd8 22. Qe4 1/2-1/2