[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1971.01.15"]
[Round "4"]
[White "Petrosian, Tigran V"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]

1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 Bb7 5. O-O d5 6. b3 Bd6 7. c4 O-O 8. Bb2 Nbd7 9. Nc3 a6 10. Rc1 Qe7 11. Re1 Ne4 12. Qc2 f5 13. cxd5 exd5 14. Ne2 c6 15. Ng3 Rf6 16. Qe2 a5 17. Nh4 Qe6 1/2-1/2