[Event "URS-ch25 Quarterfinal"]
[Site "Minsk"]
[Date "1957.05.11"]
[Round "11"]
[White "Petersons, Andrejs"]
[Black "Shagalovich, Abo I"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d6 6. d4 Nc6 7. d5 Na5 8. Nfd2 c6 9. Na3 c5 10. Nb3 Nxb3 11. axb3 Bf5 12. h3 a6 13. Re1 Qc8 14. g4 Bd7 15. e4 Ne8 16. f4 e5 17. f5 b5 18. Bg5 f6 19. Be3 Nc7 20. Qd2 Kf7 21. b4 cxb4 22. Qxb4 Rd8 23. c5 dxc5 24. Bxc5 a5 25. Qb3 a4 26. Qa2 Na6 27. Bb6 Nb4 28. Qb1 Rh8 29. Rc1 Qb7 30. Bf2 Rhc8 31. Rxc8 Rxc8 32. Qd1 Bf8 33. Bf1 Bc5 34. Bxc5 Rxc5 35. Qd2 Qb6 36. Kh1 Na6 37. Qh6 g5 38. Qxh7+ Ke8 39. Qh8+ Ke7 40. Qg7+ Kd8 41. Qf8+ Kc7 42. d6+ Qxd6 43. Qxd6+ Kxd6 44. Rd1+ Ke7 45. Rxd7+ Kxd7 46. Bxb5+ Kc7 47. Bxa6 Kb6 48. Bc4 Rc8 49. Kg2 Kc5 50. Bd5 Rb8 51. Nc4 Rb3 52. Be6 Kd4 53. Bd5 Rd3 54. Kh2 Rf3 55. Kg2 Rd3 56. Kh2 Rf3 57. h4 gxh4 58. Kg2 Rg3+ 59. Kh2 Rb3 60. g5 fxg5 61. f6 Rf3 62. f7 g4 63. Nd6 Ke3 64. Be6 Rh3+ 65. Kg2 Rg3+ 66. Kh2 Rh3+ 67. Kg1 Rg3+ 68. Kh1 Rh3+ 69. Kg2 Rg3+ 70. Kf1 Rf3+ 71. Kg1 Rg3+ 72. Kf1 Rf3+ 1/2-1/2