Hou Yifan (Black) Puzzle: Pillsbury Mate — Rooks
This chess endgame position shows how a seemingly equal material balance can be overturned by king safety and active rook placement. Black’s king has a weakened pawn shield and limited escape squares, while White’s rook already controls the seventh rank. The key tactical idea is a forcing rook invasion that drives a defender into a passive role. A supporting bishop then helps restrict the final flight squares, turning active pieces into a compact mating net.