Learn How to Win Material: Queen Fork
This middlegame puzzle comes from the Queen's Gambit Declined and shows how a queen can create a decisive material gain by attacking two targets at once. White’s active queen and piece coordination punish Black’s loose queenside pieces, especially when a pinned defender and an undefended piece sit on the same diagonal or file. The key idea is not a mating attack, but a tactical win of material through a forcing queen move that checks while also creating a fork-like threat.