Chess puzzle (Checkmate)
Opening: Slav_Defense, Slav_Defense_Exchange_Variation
Moves: 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 a6 5. e4 dxe4 6. Nxe4 b6 7. Bf4 Nd7 8.
Qe2 Bb7 *
Position (FEN): r2qkbnr/1b1npppp/pp6/8/3PNB2/8/PP2QPPP/R3KBNR w KQkq - 4 9
White to move.
Themes: Pin Opening Mate in 1, Smothered Mate 
Puzzle rating: 1028
Best move: Nd6#