[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.07.25"]
[Round "11"]
[White "Csom, Istvan"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]
[WhiteElo "2490"]
[BlackElo "2635"]

1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. b3 O-O 7. Bb2 d5 8. e3 c5 9. Nc3 dxc4 10. bxc4 Nc6 11. Qe2 Rc8 12. Rfd1 Na5 13. Rab1 Nd7 14. d3 a6 15. Ba1 Qc7 16. Bh3 Qc6 17. Bg2 Qc7 18. Bh3 Qc6 19. Bg2 1/2-1/2