Chess puzzle (Checkmate)
Opening: Horwitz_Defense, Horwitz_Defense_Other_variations
Moves: 1. d4 e6 2. Bf4 Bd6 3. Bg3 Bxg3 4. hxg3 Nc6 5. e4 b6 6. Nf3 h6 7. Nc3 Bb7 8.
Qd2 Nf6 9. O-O-O Qe7 10. Re1 O-O-O 11. d5 Nb8 12. Nb5 a6 *
Position (FEN): 1nkr3r/1bppqpp1/pp2pn1p/1N1P4/4P3/5NP1/PPPQ1PP1/2K1RB1R w - - 0 13
White to move.
Themes:  Opening Mate in 1, Smothered Mate 
Puzzle rating: 1092
Best move: Na7#