[Event "Alekhine memorial"]
[Round "9"]
[Site "Moscow"]
[Date "1971.12.05"]
[White "Lengyel, Levente"]
[WhiteElo "2485"]
[Black "Smyslov, Vassily"]
[BlackElo "2620"]
[Result "1/2-1/2"]
[ECO "E11"]
[Opening "Bogo-Indian Defence"]
 1. d4   Nf6
 2. c4   e6
 3. Nf3  Bb4+
 4. Nbd2 Qe7
 5. g3   Nc6
 6. Bg2  Bxd2+
 7. Bxd2 O-O
 8. O-O  d6
 9. e3   a5
10. b3   e5
11. d5   Nb8
12. Ne1  Na6
13. Nd3  Nc5
14. Qc2  Nfd7
15. Rae1 Nxd3
16. Qxd3 Nc5
17. Qc2  Bd7
18. f4   f6
19. f5   
1/2-1/2