Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Tartakower_Variation
Moves: 1. d4 Nf6 2. Nc3 d5 3. e4 dxe4 4. f3 exf3 5. Nxf3 Bf5 6. Bb5+ c6 7. Bc4 e6 8.
O-O Bb4 9. Ne5 Nbd7 10. Rxf5 exf5 11. Nxf7 Qe7 12. Nxh8 O-O-O 13. Nf7 Rf8 14.
Ne5 Nxe5 15. dxe5 Qc5+ 16. Kh1 Ng4 17. Qf3 Nf2+ 18. Kg1 Nh3+ 19. Kh1 *
Position (FEN): 2k2r2/pp4pp/2p5/2q1Pp2/1bB5/2N2Q1n/PPP3PP/R1B4K b - - 8 19
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 560
Best move: Qg1#