[Event "Interzonal-03"]
[Site "Gothenburg"]
[Date "1955.09.14"]
[Round "18"]
[White "Petrosian, Tigran V"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4 8. Bxc4 c5 9. Nf3 Qc7 10. Qc2 b6 11. Bb2 cxd4 12. cxd4 Ba6 13. Bd3 Qb7 14. O-O Rc8 15. Qe2 Bxd3 16. Qxd3 1/2-1/2