Exposed King Advanced Puzzle (Rated 719): Back Rank — Exposed King

A back rank mate becomes possible when a king is restricted by its own pieces or lacks a useful escape square. In this middlegame puzzle, Black exploits White’s exposed king, a pinned rook, and the alignment between the back-rank attacker and the king. The key idea combines a forcing check with removal of a defender, turning White’s material advantage into a mating net. Always examine king safety before assuming extra material guarantees the position is secure.