[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.07.11"]
[Round "1"]
[White "Portisch, Lajos"]
[Black "Liberzon, Vladimir Mikhailovi"]
[Result "1/2-1/2"]
[WhiteElo "2625"]
[BlackElo "2540"]

1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 g6 5. e4 e5 6. Be2 Bg7 7. O-O O-O 8. Re1 a5 9. Bf1 c6 10. Rb1 Re8 11. d5 Nc5 12. b3 Bd7 13. Nd2 Rf8 14. a3 cxd5 15. cxd5 Ne8 16. b4 axb4 17. axb4 Na4 18. Nxa4 Bxa4 19. Nb3 f5 20. exf5 1/2-1/2