Sacrifice Puzzle (Rated 1447): Spot Back Rank Mate — Queen Sacrifice

This middlegame puzzle is a classic example of a back rank mate pattern built around forcing moves and king restriction. White’s queen and rook coordination create a tactical net where the defender’s king has no safe flight squares, and the back rank becomes fatal. The key idea is that material count matters less than the mating geometry: once the queen is lured into a vulnerable square, the remaining heavy piece can deliver a decisive finish.