Threading The Needle Mate Puzzle (Rated 600): Win Material — Bishop Skewer
This middlegame puzzle is built around a classic skewer motif: a valuable piece is lined up behind a less valuable one, so the front piece becomes a tactical target. White’s bishop is active on a long diagonal and the black knight in the center is loose, creating a direct material win. The key idea is to notice when a defended-looking piece is actually overloaded or pinned to something more important behind it.