Chess puzzle (Checkmate)
Opening: Old_Indian_Defense, Old_Indian_Defense_Other_variations
Moves: 1. d4 d6 2. c4 Nf6 3. Nc3 Nbd7 4. Nf3 c6 5. e4 e5 6. Bd3 Qc7 7. O-O Be7 8. Be3
Nf8 9. Qd2 Ng6 10. dxe5 dxe5 11. Rad1 O-O 12. Ne2 Ng4 13. Bg5 f6 14. Bh4 Nxh4
15. Nxh4 f5 16. Nxf5 Bxf5 17. exf5 e4 18. Bxe4 *
Position (FEN): r4rk1/ppq1b1pp/2p5/5P2/2P1B1n1/8/PP1QNPPP/3R1RK1 b - - 0 18
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 571
Best move: Qxh2#