Chess puzzle (Checkmate)
Opening: Nimzo-Indian_Defense, Nimzo-Indian_Defense_Classical_Variation
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8.
f3 Qh4+ 9. g3 Nxg3 10. hxg3 Qxh1 11. Kf2 Qh5 12. Bf4 d6 13. Bg2 b6 14. Nh3 Bb7
15. Rh1 Qg6 16. Bc1 Nd7 17. Nf4 Qf7 18. g4 fxg4 *
Position (FEN): r4rk1/pbpn1qpp/1p1pp3/8/2PP1Np1/P4P2/1PQ1PKB1/2B4R w - - 0 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 811
Best move: Qxh7#