[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "9"]
[White "Petrosian, Tigran V"]
[Black "Andersson, Ulf"]
[Result "1/2-1/2"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 Be7 4. Nbd2 d5 5. e3 Nbd7 6. c3 O-O 7. Bd3 b6 8. b4 Bb7 9. Qb1 h6 10. Bh4 Nh5 11. Bg3 Qc8 12. Be5 Nhf6 13. O-O c5 14. Rc1 Nxe5 15. Nxe5 Qc7 16. a4 a5 17. b5 Rac8 1/2-1/2