Queen's Gambit Declined: Chigorin Defense, Modern Gambit

The Queen's Gambit Declined: Chigorin Defense, Modern Gambit is a chess opening classified under ECO code D07 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 4 moves: 1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3 Nf6. The resulting position leaves white to move.