[Event "Olympiad-19 Preliminaries A"]
[Site "Siegen"]
[Date "1970.09.13"]
[Round "9"]
[White "Belkadi, Ridha"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nf6 5. f3 O-O 6. Be3 b6 7. Bd3 a6 8. Nge2 c5 9. d5 Nbd7 10. Ng3 b5 11. cxb5 Ne5 12. Be2 axb5 13. Bxb5 Ba6 14. Bxa6 Rxa6 15. O-O Qa5 16. Qe2 Rb8 17. f4 Ned7 18. Rad1 Ne8 19. e5 dxe5 20. f5 Nd6 21. Nce4 Nf6 22. Nxc5 Raa8 23. a3 Qb5 24. fxg6 hxg6 25. Rf2 Nc4 26. Nge4 1/2-1/2