Chess puzzle (Checkmate)
Moves: 1. g3 d5 2. Nh3 g6 3. f3 Bg7 4. Nf2 Nf6 5. c3 O-O 6. d3 c5 7. e3 Nc6 8. Bg2 b6
9. O-O Ba6 10. Re1 Rc8 11. Na3 e6 12. Nc2 Qc7 13. b3 Rfd8 14. Bb2 Ne5 15. Qe2
Ned7 16. c4 Ne5 17. Rad1 Ned7 18. f4 Nf8 19. Ba1 b5 20. e4 Qa5 21. a3 d4 22. e5
Ne8 23. Qd2 Qb6 24. Rb1 Bb7 25. a4 b4 26. Qe2 Bxg2 27. Kxg2 f6 28. exf6 Nxf6
29. Qf3 Re8 30. Re2 Qc7 31. Rbe1 N6d7 32. Ng4 Re7 33. Bb2 Rf7 34. Bc1 e5 35.
Qd5 Nb6 36. Qe4 exf4 37. Bxf4 Qd7 38. Ne5 Bxe5 39. Qxe5 Rc6 40. Qb8 Rc8 41. Qe5
Rc6 42. Qg5 Re6 43. Qxc5 Rxe2+ 44. Rxe2 Ne6 45. Qe5 Nxf4+ 46. gxf4 Qg4+ 47. Kh1
Rxf4 48. Qe8+ Kg7 49. Qe7+ Kh6 50. Rg2 Rf1+ 51. Rg1 *
Position (FEN): 8/p3Q2p/1n4pk/8/PpPp2q1/1P1P4/2N4P/5rRK b - - 7 51
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 400
Best move: Qxg1#