Bertok, Mario VS Petrosian, Tigran V 1970.10.10

[Event "Vinkovci"]
[Site "Vinkovci"]
[Date "1970.10.10"]
[Round "6"]
[White "Bertok, Mario"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. Nge2 Nbd7 7. Ng3 a6 8. Bd3 h5 9. Nf5 Bf8 10. h4 g6 11. Ne3 Bh6 12. a3 Kf8 13. g3 Ne8 14. b4 b6 15. Bd2 Kg7 16. Kf1 cxb4 17. axb4 a5 18. Kg2 Ba6 19. bxa5 Nc5 20. Bc2 bxa5 21. Na4 Nb7 22. Bd3 Nf6 23. Qe2 Nd7 24. Rhb1 Qc7 25. Ra3 1/2-1/2