Chess puzzle (Checkmate)
Opening: Alekhine_Defense, Alekhine_Defense_Normal_Variation
Moves: 1. e4 Nf6 2. e5 Nd5 3. Bc4 Nb6 4. Bb3 Nc6 5. f4 d6 6. Nf3 dxe5 7. Nxe5 Nxe5 8.
fxe5 e6 9. O-O Bc5+ 10. Kh1 Bd7 11. c3 Bb5 12. Rf4 Bd3 13. Qf3 O-O 14. Na3 Qg5
15. h4 Qxe5 16. Bc2 Qe1+ 17. Kh2 Be2 18. Qe4 Bd6 *
Position (FEN): r4rk1/ppp2ppp/1n1bp3/8/4QR1P/N1P5/PPBPb1PK/R1B1q3 w - - 6 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 549
Best move: Qxh7#