Black to play and win.

Greenwood, Indiana Chess Club, ?
Analysis of McCorkle, Bob vs. Nelms, Al

1 2 3 4 5 6 7 8 h g f e d c b a -1

(black to move) 1. d4 Nf6 2. Nf3 e6 3. Bg5 Be7 4. e3 b6 5. Bd3 Bb7 6. Nbd2 d5 7. c3 Nbd7 8. O-O Ne4 9. Bxe7 Qxe7 10. Qc2 Ndf6 11. c4 c6 12. Rac1 O-O 13. Ne5 Qb4 14. Nxe4 Nxe4 15. Bxe4 dxe4 16. b3 f6 17. Ng4 h5 18. Qxe4 hxg4 19. Qxe6+ Rf7 20. Qxg4 Qd6 21. Qf5 g6 22. c5 Qc7 23. Qxg6+ Rg7 24. Qxf6 Rf8 25. Qe6+ Rff7 26. Qe8+ Kh7 27. Qe5 Qd7 28. f4 Re7 29. Qh5+ Kg8 30. Rf3 Bc8 31. Re1 Qd8 32. Rg3 b5 33. Rxg7+ Rxg7 34. h3 Be6 35. Re2 Qd7 36. g4 Bf5 37. Kh2 Be4 38. Rf2 a5 39. f5 Bd5 40. f6 Rf7 41. g5 Rh7 42. Qg6+ Kh8 43. Qf5 Be6 44. f7 Rxf7 45. Qe5+ Kg8 46. Rxf7 Qxf7 47. Qf6 Qxf6 48. gxf6 b4 49. e4 a4 50. d5 cxd5 51. Kg3 d4 52. c6 axb3 53. axb3 Bxb3

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Pawn promotion:
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Click here for 50. bxa4
Click here for 48... Kf7
Click here for 49... Bxb3
Click here for 50. bxa4