Chess puzzle (Checkmate)
Opening: Scandinavian_Defense, Scandinavian_Defense_Modern_Variation
Moves: 1. e4 d5 2. exd5 Nf6 3. Nf3 Bg4 4. Be2 Qxd5 5. O-O Nc6 6. d3 O-O-O 7. h3 Bh5 8.
Nbd2 h6 9. a4 Rg8 10. a5 a6 11. Nh2 Bxe2 12. Qxe2 g5 13. f3 Nd4 14. Qd1 e6 15.
c3 Nf5 16. Ne4 Nxe4 17. fxe4 Qc5+ 18. Kh1 *
Position (FEN): 2kr1br1/1pp2p2/p3p2p/P1q2np1/4P3/2PP3P/1P4PN/R1BQ1R1K b - - 2 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 840
Best move: Ng3#