Chess puzzle (Checkmate)
Opening: Caro-Kann_Defense, Caro-Kann_Defense_Other_variations
Moves: 1. e4 c6 2. Nc3 d5 3. Qe2 a6 4. Nf3 dxe4 5. Nxe4 Bg4 6. d3 Nd7 *
Position (FEN): r2qkbnr/1p1npppp/p1p5/8/4N1b1/3P1N2/PPP1QPPP/R1B1KB1R w KQkq - 1 7
White to move.
Themes: Pin Opening Mate in 1, Smothered Mate 
Puzzle rating: 1051
Best move: Nd6#