Baltic Defense Puzzle (Rated 1214): Break a Pin — Win a Queen

Pins look like prison cells, but they can be the key to a winning combination. White's bishop is frozen — Black's queen pins it to White's queen on the e-file. Yet that bishop still commands the sensitive f7 square, guarded only by rook and king. A single forcing check there compels a recapture, and the moment the bishop leaves, White's queen gains an open line to the enemy queen. The pinned piece becomes the deflecting wedge that wins the game.