Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Baltic_Defense
Moves: 1. d4 d5 2. c4 Bf5 3. Nc3 Nf6 4. Bg5 e6 5. cxd5 exd5 6. Qb3 Nc6 7. Qxb7 Nxd4 8.
Rc1 Nc2+ 9. Rxc2 Bxc2 10. Nxd5 Be7 11. Nxe7 *
Position (FEN): r2qk2r/pQp1Nppp/5n2/6B1/8/8/PPb1PPPP/4KBNR b Kkq - 0 11
Black to move.
Themes:  Opening Mate in 1 
Puzzle rating: 665
Best move: Qd1#