Chess puzzle (Checkmate)
Opening: Caro-Kann_Defense, Caro-Kann_Defense_Other_variations
Moves: 1. d4 d5 2. Nc3 c6 3. e4 dxe4 4. Qe2 Nf6 5. Nxe4 Nbd7 *
Position (FEN): r1bqkb1r/pp1npppp/2p2n2/8/3PN3/8/PPP1QPPP/R1B1KBNR w KQkq - 1 6
White to move.
Themes: Pin Opening Mate in 1, Smothered Mate 
Puzzle rating: 1152
Best move: Nd6#