[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1971.01.22"]
[Round "9"]
[White "Langeweg, Kick"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]
1. Nf3 d6 2. d4 Nf6 3. Nc3 Nbd7 4. e4 e5 5. g3 Be7 6. Bg2 O-O 7. O-O Re8 8. a4 Bf8 9. a5 a6 10. b3 b5 11. d5 Bb7 12. Ne1 Nb8 13. Nd3 c6 14. Nb4 c5 15. Nd3 Nbd7 16. Nb1 g6 17. c4 Bg7 18. Bb2 Nf8 19. Nd2 b4 1/2-1/2