[Event "URS-ch25 Semifinal"]
[Site "Leningrad"]
[Date "1957.11.15"]
[Round "4"]
[White "Estrin, Yakov Borisovich"]
[Black "Aronin, Lev Solomonovich"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Bc4 Qa5 8. Qd2 e6 9. Bb3 b5 10. f3 b4 11. Na4 Bb7 12. a3 d5 13. Bxf6 Nxf6 14. e5 Nd7 15. f4 Rc8 16. O-O Nc5 17. Nxc5 Bxc5 18. axb4 Qxb4 19. Qxb4 Bxb4 20. Kf2 Bc5 21. Ke3 f6 22. c3 Ke7 23. Kd2 fxe5 24. fxe5 Bb6 25. Bc2 Bc7 26. Rae1 Rcf8 27. Rf3 Rxf3 28. Nxf3 Bc6 29. Nd4 Bd7 30. Bd3 a5 31. Nf3 Rb8 32. Kc2 Ba4+ 33. Kc1 h6 34. Bg6 Rf8 35. Kd2 Rf4 36. h3 Be8 37. Bxe8 Kxe8 38. Kd3 g5 39. b3 Kd7 40. Re2 Bd8 41. Ra2 g4 42. hxg4 Rxg4 43. Re2 h5 44. Ra2 Bb6 45. Re2 Kc6 46. Kc2 Kb5 47. Kd3 Kc6 48. Ra2 Rg3 49. Ra1 Rxg2 50. Rh1 Rg3 51. Ke2 d4 52. cxd4 Kd5 53. Rxh5 Rg2+ 54. Kd3 Rb2 55. Kc3 Rf2 56. Rh3 Rg2 57. Rh4 Rg7 58. Rf4 Rc7+ 59. Kd3 a4 60. bxa4 Ra7 61. Ne1 Rxa4 62. Nc2 Bxd4 63. Rxd4+ Rxd4+ 64. Nxd4 1/2-1/2