Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 e6 3. c4 Nc6 4. d3 Qc7 5. Be2 Nge7 6. O-O Ng6 7. Be3 b6 8. Nbd2
Bb7 9. Re1 Nce5 10. Nxe5 Qxe5 11. b3 Bd6 12. Nf3 Qf6 13. Bg5 Qc3 14. Bd2 Qf6
15. Rc1 h6 16. Bc3 Ne5 17. Nxe5 Bxe5 18. Bd2 O-O 19. f4 Bd4+ 20. Kh1 Qe7 21.
Bf3 f5 22. e5 Bxf3 23. Qxf3 Rab8 24. Be3 Bxe3 25. Rxe3 Rbd8 26. Qh3 Kh7 27. Rg3
Rg8 28. Qh5 g6 29. Qe2 g5 30. Rh3 gxf4 31. Qh5 Qg5 32. Qe2 Rg6 33. Rf1 Rdg8 34.
Rg1 Qe7 35. Qf3 Rg4 36. Qb7 R8g7 37. Qxa7 Qg5 38. Qb7 h5 39. a4 Kh6 40. Qf3 Rh4
41. Rxh4 Qxh4 42. Qb7 f3 43. Qxf3 Rg4 44. Qb7 Rd4 45. Qxb6 Rxd3 46. a5 Qe4 47.
a6 Re3 48. a7 Re1 49. Qxc5 f4 50. a8=Q Rxg1+ 51. Kxg1 *
Position (FEN): Q7/3p4/4p2k/2Q1P2p/2P1qp2/1P6/6PP/6K1 b - - 0 51
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1080
Best move: Qe1#