Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Chigorin_Variation
Moves: 1. d4 d5 2. Nf3 Nc6 3. c4 dxc4 4. e4 e6 5. Bxc4 Bb4+ 6. Nc3 Nf6 7. e5 Ne4 8.
Qd3 Nxc3 9. bxc3 Be7 10. O-O O-O 11. a4 Na5 12. Ba2 c5 13. Be3 cxd4 14. cxd4
Bd7 15. Rfd1 Bc6 16. Nd2 Bxa4 17. Bb1 Bxd1 *
Position (FEN): r2q1rk1/pp2bppp/4p3/n3P3/3P4/3QB3/3N1PPP/RB1b2K1 w - - 0 18
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 399
Best move: Qxh7#