Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Albin_Countergambit
Moves: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 c5 5. a3 Nc6 6. Bd2 Nge7 7. b4 Ng6 8. Bg5
Be7 9. Bxe7 Qxe7 10. Nbd2 Ncxe5 11. g3 *
Position (FEN): r1b1k2r/pp2qppp/6n1/2p1n3/1PPp4/P4NP1/3NPP1P/R2QKB1R b KQkq - 0 11
Black to move.
Themes: Pin Middlegame Mate in 1, Smothered Mate 
Puzzle rating: 1462
Best move: Nd3#