Chess puzzle (Checkmate)
Opening: Caro-Kann_Defense, Caro-Kann_Defense_Classical_Variation
Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5
Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bf4 Be7 12. O-O-O Ngf6 13. Ne5 O-O 14. Ne4 Nd5
15. Bd2 Rc8 16. Qg3 Bg5 17. Nxg5 hxg5 18. h6 f6 19. h7+ Kh8 *
Position (FEN): 2rq1r1k/pp1n2pP/2p1pp2/3nN1p1/3P4/6Q1/PPPB1PP1/2KR3R w - - 1 20
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1447
Best move: Ng6#