Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 Nc6 5. Bf4 Qe7 6. g3 Ngxe5 7. Nbd2 *
Position (FEN): r1b1kb1r/ppppqppp/2n5/4n3/2P2B2/5NP1/PP1NPP1P/R2QKB1R b KQkq - 1 7
Black to move.
Themes: Pin Opening Mate in 1, Smothered Mate 
Puzzle rating: 1390
Best move: Nd3#