Chess puzzle (Checkmate)
Moves: 1. d4 b6 2. b3 Bb7 3. Bb2 c5 4. d5 e6 5. e4 exd5 6. exd5 Nf6 7. c4 d6 8. Nf3
Be7 9. Bd3 a6 10. O-O O-O 11. h3 Bc8 12. Qc2 g6 13. Nbd2 Bd7 14. Rae1 b5 15. a3
bxc4 16. Nxc4 Bb5 17. Re2 Bxc4 18. bxc4 Nbd7 19. Rfe1 Re8 20. Kh2 Rb8 21. h4
Ng4+ 22. Kg1 f6 23. Nd2 Kg7 24. h5 Nge5 25. hxg6 Nxd3 26. Qxd3 hxg6 27. Ba1 Ne5
28. Qc2 Rh8 29. Ne4 Qd7 30. Bxe5 fxe5 31. Rb1 Qg4 32. f3 Qh4 33. Rxb8 Qh2+ 34.
Kf2 Bh4+ 35. Ke3 Qf4+ 36. Kd3 Rxb8 37. Nxd6 *
Position (FEN): 1r6/6k1/p2N2p1/2pPp3/2P2q1b/P2K1P2/2Q1R1P1/8 b - - 0 37
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 820
Best move: Qd4#