Chess puzzle (Checkmate)
Opening: French_Defense, French_Defense_Other_variations
Moves: 1. e4 e6 2. Bc4 b6 3. Bb3 Bb7 4. f3 c5 5. Nc3 Ne7 6. Nb5 a6 *
Position (FEN): rn1qkb1r/1b1pnppp/pp2p3/1Np5/4P3/1B3P2/PPPP2PP/R1BQK1NR w KQkq - 0 7
White to move.
Themes:  Opening Mate in 1, Smothered Mate 
Puzzle rating: 988
Best move: Nd6#