Chess puzzle (Checkmate)
Opening: Zukertort_Opening, Zukertort_Opening_Slav_Invitation
Moves: 1. Nf3 c6 2. e4 d5 3. exd5 cxd5 4. c4 Nf6 5. cxd5 Nxd5 6. Bb5+ Bd7 7. Bc4 Nf6
8. Ne5 e6 9. Nc3 Nc6 10. d4 Nxe5 11. dxe5 Ng8 12. Ne4 Ne7 *
Position (FEN): r2qkb1r/pp1bnppp/4p3/4P3/2B1N3/8/PP3PPP/R1BQK2R w KQkq - 3 13
White to move.
Themes:  Opening Mate in 1, Smothered Mate 
Puzzle rating: 995
Best move: Nd6#