Chess puzzle (Checkmate)
Opening: Horwitz_Defense, Horwitz_Defense_Other_variations
Moves: 1. d4 e6 2. a3 d5 3. c4 c5 4. e3 Nc6 5. Nc3 Qb6 6. Na4 Qa5+ 7. Bd2 Qc7 8. Nxc5
Bxc5 9. dxc5 Ne5 10. cxd5 exd5 11. Bb5+ Bd7 12. Bxd7+ Nxd7 13. b4 Ngf6 14. Nf3
O-O 15. O-O Ng4 16. Nd4 *
Position (FEN): r4rk1/ppqn1ppp/8/2Pp4/1P1N2n1/P3P3/3B1PPP/R2Q1RK1 b - - 6 16
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 881
Best move: Qxh2#