[Event "Interzonal-03"]
[Site "Gothenburg"]
[Date "1955.09.01"]
[Round "11"]
[White "Panno, Oscar"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Bb4 5. e3 O-O 6. Be2 dxc4 7. Bxc4 c5 8. O-O cxd4 9. exd4 a6 10. Bg5 b5 11. Bb3 Bb7 12. Qd3 Nbd7 13. Rad1 Bxc3 14. bxc3 Qc7 15. Rc1 Ng4 16. Bh4 Bxf3 17. Bg3 Nge5 18. Bxe5 Nxe5 19. dxe5 Bb7 20. Qe3 Rac8 21. c4 Qc5 22. Qxc5 Rxc5 23. cxb5 Rxb5 24. f4 g5 25. Rc7 Bd5 26. Bxd5 Rxd5 27. fxg5 Rxe5 28. Ra7 Rxg5 29. Rxa6 Rc8 30. Ra7 Rc2 31. g3 1/2-1/2