Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Other_variations
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. f3 c5 6. e4 cxd4 7. Qxd4 Nc6 8. Qd1
d4 9. Nce2 Nxe4 10. Bxe7 Qa5+ 11. b4 Nxb4 12. fxe4 *
Position (FEN): r1b1k2r/pp2Bppp/4p3/q7/1nPpP3/8/P3N1PP/R2QKBNR b KQkq - 0 12
Black to move.
Themes: Double Check Opening Mate in 1 
Puzzle rating: 1543
Best move: Nd3#