[Event "Alekhine Memorial-02"]
[Site "Moscow"]
[Date "1971.12.12"]
[Round "13"]
[White "Lengyel, Levente"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. Qe2 c5 7. dxc5 Bxc5 8. O-O Nbd7 9. e4 b5 10. Bd3 Bb7 11. Nbd2 Be7 12. Nb3 O-O 13. Bd2 b4 14. a3 a5 15. axb4 axb4 16. Bf4 Qb6 17. Nfd2 1/2-1/2