Chess puzzle (Checkmate)
Opening: Four_Knights_Game, Four_Knights_Game_Other_variations
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. d3 h6 5. Be2 Bc5 6. h3 d6 7. O-O O-O 8. Nh2
Nd4 9. Kh1 Be6 10. f4 Qd7 11. f5 Bxf5 12. exf5 Nxf5 13. Bg4 *
Position (FEN): r4rk1/pppq1pp1/3p1n1p/2b1pn2/6B1/2NP3P/PPP3PN/R1BQ1R1K b - - 1 13
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 966
Best move: Ng3#