Chess puzzle (Checkmate)
Moves: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Nd4 5. Nxe5 Qe7 6. Nd3 *
Position (FEN): r1b1kb1r/ppppqppp/5n2/8/2Pn4/2NN2P1/PP1PPP1P/R1BQKB1R b KQkq - 2 6
Black to move.
Themes: Pin Opening Mate in 1, Smothered Mate 
Puzzle rating: 1555
Best move: Nf3#