[Event "Interzonal-12a"]
[Site "Las Palmas"]
[Date "1982.07.25"]
[Round "10"]
[White "Ribli, Zoltan"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]
[WhiteElo "2590"]
[BlackElo "2605"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nc3 b6 5. Bg5 h6 6. Bh4 Bb7 7. e3 g5 8. Bg3 Ne4 9. Qc2 Bxc3+ 10. bxc3 Nxg3 11. hxg3 Nc6 12. Nd2 Qe7 13. Nb3 f5 14. Bd3 Qf6 15. f3 Ne7 16. a4 h5 17. a5 g4 18. Qf2 1/2-1/2