Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Modern_Variation
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 dxc4 5. e4 Nc6 6. e5 Qxd4 7. Qxd4 Nxd4 8.
Rd1 Nc2+ 9. Kd2 Ng4 10. Kxc2 Nxf2 *
Position (FEN): r1b1kb1r/ppp2ppp/4p3/4P1B1/2p5/2N5/PPK2nPP/3R1BNR w kq - 0 11
White to move.
Themes:  Opening Mate in 1 
Puzzle rating: 450
Best move: Rd8#