Chess puzzle (Checkmate)
Moves: 1. c4 e5 2. Nc3 Nf6 3. e3 Nc6 4. b3 d5 5. Bb2 d4 6. Nce2 Nb4 7. a3 *
Position (FEN): r1bqkb1r/ppp2ppp/5n2/4p3/1nPp4/PP2P3/1B1PNPPP/R2QKBNR b KQkq - 0 7
Black to move.
Themes:  Opening Mate in 1, Smothered Mate 
Puzzle rating: 1020
Best move: Nd3#