Mate In 3 Intermediate Puzzle (Rated 990): Spot a Mate in 3 — Endgame Pattern

This chess endgame puzzle is a forcing mate in 3 built around king safety and rook activity. White’s pieces are active on the seventh rank, but Black’s counterplay is even more direct: the king is exposed, the back rank is vulnerable, and tactical motifs like skewer and pin decide the game. In classical chess, these patterns often appear when one side’s pieces coordinate to restrict the king’s escape squares and force a final mating net.