Learn How to Win Material: Short Skewer
This chess endgame puzzle shows how a seemingly active rook can become a tactical target. The key idea is a short skewer: a forcing check that drives the king onto a square where the attacked piece behind it becomes vulnerable. In practical classical chess, these motifs often appear when one side has an exposed king, active rooks, and loose back-rank or corner pieces. Here, the tactic converts activity into a clean material win and leaves the defender without useful counterplay.