White to play and mate in 3.

Greenwood Indiana Chess Club, Chess.com
Analysis of Greg+John vs. tChess set to level 1700

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

(white to move) 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd3 dxe4 5. Bxe4 Nf6 6. Bf3 O-O 7. Nge2 c5 8. O-O cxd4 9. Qxd4 Qxd4 10. Nxd4 Bxc3 11. bxc3 e5 12. Nb5 Nc6 13. Re1 Bg4 14. Bxc6 bxc6 15. Nd6 Rfd8 16. Ba3 Nd7 17. c4 Rab8 18. c5 Be6 19. c4 f6 20. Rad1 a5 21. Rd2 Bg4 22. f3 Be6 23. f4 a4 24. f5 Bf7 25. h3 Nf8 26. Red1 Bh5 27. g4 Be8 28. Nxe8 Rxe8 29. Rd6 Rec8 30. Kf2 Rc7 31. Ke3 Rbb7 32. Rd1d3 Nd7 33. Ke4 g6 34. h4 Kf8 35. g5 gxf5+ 36. Kxf5 fxg5 37. hxg5 Kg8 38. Rd2 Kf8 39. Ke6 Ke8 40. Rd1 Kd8 41. g6 Kc8 42. g7 Nxc5+ 43. Bxc5 Re7+ 44. Kf5 Rxg7 45. Rd8+ Kc7 46. Kf6 Rb8 47. Bb6+ Rxb6 48. Kxg7 Rb4 49. Rd1d7+ Kb6 50. Rb8+ Kc5 51. Rxb4 Kxb4 52. Kf6 e4 53. Ke5 e3 54. Kd4 e2 55. Rb7+ Ka3 56. Re7 Kxa2 57. Kc3 e1=Q+ 58. Rxe1 h5 59. c5 h4 60. Re3 Kb1 61. Rh3 a3 62. Rh2 h3 63. Rxh3 Ka2 64. Kc2 Ka1 65. Rxa3#

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Pawn promotion:
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