[Event "URS-ch07 Final"]
[Site "Moscow"]
[Date "1931.11.04"]
[Round "11"]
[White "Mazel, Isaak"]
[Black "Sorokin, Nikolay Tikhovich"]
[Result "0-1"]

1. Nf3 d5 2. b3 c5 3. Bb2 f6 4. e3 e5 5. d4 cxd4 6. exd4 e4 7. Nfd2 f5 8. c4 Nf6 9. Nc3 Bb4 10. Nxd5 Nxd5 11. cxd5 O-O 12. Qc2 a6 13. a3 Bxd2+ 14. Qxd2 f4 15. O-O-O b5 16. g3 Qxd5 17. gxf4 Bf5 18. Qe3 Nc6 19. Rg1 Na5 20. Bh3 Nxb3+ 21. Kb1 Na5 22. Bxf5 Rxf5 23. Rge1 Raf8 24. Qxe4 Qxe4+ 25. Rxe4 Rxf4 26. Rxf4 Rxf4 27. d5 Rf7 28. Re1 Nc4 29. Re8+ Rf8 30. Rxf8+ Kxf8 31. d6 Nxd6 32. Kc2 Nc4 33. Bc1 Ke7 34. Kc3 Kd6 35. Kd4 Kc6 36. h4 g6 37. f3 Kd6 38. Bh6 Ke6 39. Bc1 Ne5 40. Ke4 a5 41. Bd2 Nc6 42. Kf4 b4 43. axb4 axb4 44. h5 b3 45. Bc3 gxh5 46. Kg5 h4 47. Kxh4 Kf7 48. Kh5 Nb4 49. Kg5 Nd3 50. f4 b2 0-1