Chess puzzle (Checkmate)
Moves: 1. c4 e5 2. e4 Nc6 3. Nc3 Bc5 4. g3 h5 5. Nge2 Nd4 6. a3 *
Position (FEN): r1bqk1nr/pppp1pp1/8/2b1p2p/2PnP3/P1N3P1/1P1PNP1P/R1BQKB1R b KQkq - 0 6
Black to move.
Themes:  Opening Mate in 1, Smothered Mate 
Puzzle rating: 1071
Best move: Nf3#