Chess puzzle (Checkmate)
Opening: Caro-Kann_Defense, Caro-Kann_Defense_Breyer_Variation
Moves: 1. e4 c6 2. d3 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Qe2 Nd7 6. Nf3 Ngf6 *
Position (FEN): r2qkb1r/pp1npppp/2p2n2/5b2/4N3/3P1N2/PPP1QPPP/R1B1KB1R w KQkq - 5 7
White to move.
Themes: Pin Opening Mate in 1, Smothered Mate 
Puzzle rating: 1477
Best move: Nd6#