Chess puzzle (Checkmate)
Opening: Old_Indian_Defense, Old_Indian_Defense_Two_Knights_Variation
Moves: 1. c4 e5 2. Nc3 Nf6 3. Nf3 d6 4. d4 exd4 5. Nxd4 a6 6. g3 Nc6 7. Bg2 Bd7 8. O-O
Be7 9. b3 O-O 10. Bb2 Re8 11. Qd2 h6 12. Rad1 Rb8 13. Rfe1 Nxd4 14. Qxd4 Bc6
15. Nd5 Nxd5 *
Position (FEN): 1r1qr1k1/1pp1bpp1/p1bp3p/3n4/2PQ4/1P4P1/PB2PPBP/3RR1K1 w - - 0 16
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 818
Best move: Qxg7#