London System Middlegame Puzzle (Rated 1385): Skewer — Queen Check

This middlegame position is decided by piece activity and king safety rather than material. Black’s advanced knight creates pressure around the uncastled white king while also becoming a tactical target. The key idea is to use a forcing queen check that exploits the alignment between the king, vulnerable pieces, and weakened kingside squares. A skewer is especially powerful when the attacked piece cannot move safely because doing so exposes a more valuable target or allows a decisive follow-up.