Chess puzzle (Checkmate)
Opening: Old_Indian_Defense, Old_Indian_Defense_Other_variations
Moves: 1. d4 d6 2. c4 Nd7 3. Nc3 c6 4. Nf3 h6 5. e4 e5 6. Be2 Qe7 7. Be3 Ngf6 8. h3 a6
9. d5 c5 10. O-O g5 11. Qa4 g4 12. Nh4 gxh3 13. Nf5 Qd8 14. Nb5 Nb6 *
Position (FEN): r1bqkb1r/1p3p2/pn1p1n1p/1NpPpN2/Q1P1P3/4B2p/PP2BPP1/R4RK1 w kq - 4 15
White to move.
Themes: Double Check Middlegame Mate in 1 
Puzzle rating: 1100
Best move: Nc7#