Chess puzzle (Checkmate)
Opening: Old_Indian_Defense, Old_Indian_Defense_Other_variations
Moves: 1. d4 d6 2. c4 Nc6 3. Nc3 Bf5 4. e4 Bg6 5. Nf3 Nf6 6. Bd3 Nb4 7. O-O Nxd3 8.
Qxd3 c5 9. d5 e6 10. Bg5 Be7 11. dxe6 fxe6 12. Rad1 O-O 13. Qe3 Nh5 14. Bxe7
Qxe7 15. Rd2 Nf4 16. Nb5 Bh5 17. Nxd6 Bxf3 18. gxf3 Qg5+ 19. Kh1 *
Position (FEN): r4rk1/pp4pp/3Np3/2p3q1/2P1Pn2/4QP2/PP1R1P1P/5R1K b - - 2 19
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 899
Best move: Qg2#