Chess puzzle (Checkmate)
Opening: Kings_Indian_Defense, Kings_Indian_Defense_Smyslov_Variation
Moves: 1. d4 Nf6 2. c4 d6 3. Nc3 g6 4. Nf3 Bg7 5. Bg5 c6 6. e3 Qc7 7. Be2 Nbd7 8. Rc1
O-O 9. Qc2 e5 10. O-O h6 11. Bh4 b6 12. Rfd1 Bb7 13. b3 Rad8 14. Ne4 g5 15.
Nxf6+ Nxf6 16. Bg3 Nh5 17. Nxg5 Nxg3 *
Position (FEN): 3r1rk1/pbq2pb1/1ppp3p/4p1N1/2PP4/1P2P1n1/P1Q1BPPP/2RR2K1 w - - 0 18
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 537
Best move: Qh7#