[Event "Olympiad-08 Final B"]
[Site "Buenos Aires"]
[Date "1939.09.09"]
[Round "6"]
[White "Sierra, Jose"]
[Black "Opsahl, Haakon"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 c5 8. d5 exd5 9. cxd5 d6 10. b3 Nbd7 11. Bb2 Re8 12. Nd2 a6 13. a4 b5 14. axb5 axb5 15. Nxb5 Bxd5 16. Bxd5 Nxd5 17. Nc4 Rxa1 18. Bxa1 N7b6 19. e4 Nxc4 20. bxc4 Nc7 21. Qg4 Bf8 22. Nc3 g6 23. f4 Bg7 24. f5 Bd4+ 25. Kg2 Qe7 26. Re1 Qe5 27. fxg6 fxg6 28. Nd5 Nxd5 29. Bxd4 Qxd4 30. cxd5 Qe5 31. Qf4 Kg7 32. Qxe5+ Rxe5 33. Kf3 Re7 34. Rb1 Kf6 35. Rb8 h5 36. Rd8 Ke5 37. Ke3 g5 38. h3 g4 39. h4 Ra7 40. Re8+ Kf6 41. Re6+ Kf7 42. Rxd6 Ra3+ 43. Kf4 Rf3+ 44. Ke5 Rxg3 45. Rc6 Rc3 46. d6 g3 47. Rc7+ Kg6 48. d7 Rd3 49. Rxc5 g2 50. Rc1 Rxd7 51. Rg1 Rd2 52. Kf4 Kf6 53. Ra1 Rf2+ 54. Kg3 Re2 55. Kf3 Rb2 56. Ra6+ Kf7 57. Ra7+ Kf6 58. Ra6+ Kf7 59. Ra1 Kf6 60. Ke3 Rc2 61. Ra6+ Kf7 62. Ra1 Kf6 1/2-1/2