De Greif, Boris VS Najdorf, Miguel 1955.03.15

[Event "Mar del Plata International-18"]
[Site "Mar del Plata"]
[Date "1955.03.15"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. c4 g6 3. b3 Bg7 4. Bb2 O-O 5. g3 d6 6. d4 Bd7 7. Bg2 Qc8 8. O-O Bh3 9. Nbd2 Bxg2 10. Kxg2 e5 11. dxe5 Nfd7 12. Qc2 dxe5 13. Rad1 Nc6 14. h4 Re8 15. h5 Nd4 16. Bxd4 exd4 17. hxg6 hxg6 18. c5 b6 19. c6 Nf8 20. Qc4 Qg4 21. Rh1 Bf6 22. e4 Rad8 23. Rde1 Qe6 24. e5 Qxc4 25. Nxc4 Be7 26. a4 d3 27. Rd1 Ne6 28. Nb2 Nc5 29. b4 Na6 30. Nxd3 Bxb4 31. Nxb4 Nxb4 32. Rxd8 Rxd8 33. Rh4 a5 34. Rd4 Rc8 35. Rc4 Re8 36. Nd4 Rxe5 37. Nb5 Re7 38. Rc1 Kf8 39. Rd1 Ke8 40. Na7 Re6 41. Rc1 Kf8 42. Rc4 Kg7 43. f4 f5 44. Kf3 Kf6 45. Nb5 Na6 46. g4 Re7 47. gxf5 gxf5 48. Rc1 Rh7 49. Re1 Nc5 50. Re8 Ne6 51. Rc8 Rh3+ 52. Kf2 Rh2+ 53. Ke3 Ra2 54. Nxc7 Ra3+ 55. Kf2 Nxc7 56. Rxc7 Rxa4 57. Rb7 Rxf4+ 58. Ke3 Rc4 59. Rxb6 Kg5 60. Ra6 Kg4 61. Rxa5 f4+ 62. Kf2 Rc2+ 63. Kg1 Kg3 64. Rg5+ Kf3 65. Ra5 Rc1+ 66. Kh2 Rxc6 67. Ra3+ Kg4 68. Kg2 Rc2+ 69. Kf1 Rb2 70. Rc3 Rh2 71. Kg1 Re2 72. Kf1 Rb2 73. Ra3 f3 1/2-1/2