[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1971.01.19"]
[Round "7"]
[White "Olafsson, Fridrik"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. c4 Nf6 2. Nc3 c6 3. Nf3 d5 4. e3 g6 5. d4 Bg7 6. Be2 O-O 7. O-O b6 8. b3 e6 9. a4 a5 10. Ne5 Bb7 11. Ba3 Re8 12. b4 Nfd7 13. Nxd7 Nxd7 1/2-1/2