Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Chigorin_Variation
Moves: 1. d4 d5 2. Nc3 e6 3. Bf4 a6 4. Nf3 Bb4 5. Qd3 Nc6 6. g3 Nf6 7. Bg2 Ne4 8. O-O
Qf6 9. Nxe4 dxe4 10. Qxe4 O-O 11. c3 Bd6 12. Ng5 Bxf4 *
Position (FEN): r1b2rk1/1pp2ppp/p1n1pq2/6N1/3PQb2/2P3P1/PP2PPBP/R4RK1 w - - 0 13
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 1742
Best move: Qxh7#