Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Queens_Knight_Variation
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Ne7 4. Bf4 dxc4 5. e4 Nbc6 6. Nb5 e5 7. dxe5 Qxd1+ 8.
Rxd1 a6 *
Position (FEN): r1b1kb1r/1pp1nppp/p1n5/1N2P3/2p1PB2/8/PP3PPP/3RKBNR w Kkq - 0 9
White to move.
Themes:  Opening Mate in 1 
Puzzle rating: 1002
Best move: Nxc7#