Chess puzzle (Checkmate)
Opening: Horwitz_Defense, Horwitz_Defense_Other_variations
Moves: 1. d4 e6 2. Nf3 b6 3. Nc3 Bb7 4. e3 Bxf3 5. Qxf3 Nc6 6. Bb5 Nce7 7. Bxd7+ Kxd7
8. Qxf7 Nh6 9. Qf3 Nhf5 10. d5 Nh4 11. dxe6+ Kc8 *
Position (FEN): r1kq1b1r/p1p1n1pp/1p2P3/8/7n/2N1PQ2/PPP2PPP/R1B1K2R w KQ - 1 12
White to move.
Themes: Hanging Piece, Queenside Attack Opening Mate in 1 
Puzzle rating: 549
Best move: Qxa8#