Queen's Gambit Declined Been Koomen Variation Puzzle (Rated 1038): Win a Fork — Decisive Material Gain

This middlegame puzzle shows how active queen play can turn a small initiative into decisive material gain. White’s pieces are coordinated against a vulnerable black king position, while Black’s bishop and queen create tactical weaknesses around the center and queenside. The key idea is to use forcing moves that expose a pinned or trapped piece, then collect material when the defender is overloaded. In classical chess, these tactical shots often decide the game before the endgame begins.