Queen's Gambit Declined: Albin Countergambit, Janowski Variation

The Queen's Gambit Declined: Albin Countergambit, Janowski Variation is a chess opening classified under ECO code D08 in the Closed & Semi-Closed Games family, arising from 1.d4 d5, including the Queen's Gambit, Slav Defense, and related systems. It is reached after 5 moves: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 f6. The resulting position leaves white to move.