[Event "Olympiad-09"]
[Site "Dubrovnik"]
[Date "1950.08.29"]
[Round "7"]
[White "Opsahl, Haakon"]
[Black "Lambert, Hans"]
[Result "0-1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O Nbd7 8. Qc2 cxd4 9. exd4 dxc4 10. Bxc4 a6 11. a3 Be7 12. Bg5 h6 13. Bh4 b5 14. Ba2 Bb7 15. Ne5 Rc8 16. Qe2 Nb6 17. Rad1 Nfd5 18. Nxd5 Nxd5 19. Bg3 Bh4 20. Bb1 Bxg3 21. hxg3 Qg5 22. Nf3 Qh5 23. Qd3 Nf6 24. Rfe1 Qd5 25. Re5 Qc4 26. Qd2 Rfd8 27. Bd3 Qb3 28. Re3 Qd5 29. Re5 Qd6 30. Re2 Kf8 31. Bb1 Bxf3 32. gxf3 Rc4 33. Re3 Rxd4 34. Rd3 Rxd3 35. Qxd3 Qxd3 36. Rxd3 Rxd3 37. Bxd3 Nd5 38. Kf1 Ke7 39. a4 Nc7 40. axb5 axb5 41. Ke2 Kd6 42. Kd2 Kc5 43. Be2 Nd5 44. Kd3 Nf6 45. Kc3 b4+ 46. Kd3 h5 47. f4 Ng4 48. f3 Nf2+ 49. Ke3 Nh1 50. g4 h4 51. Bf1 Ng3 52. Bh3 Kc4 0-1