Mate In 3 Puzzle (Rated 1293): Mate in 3 — Chess Endgame Pattern

This chess endgame puzzle is a classic mating net: the attacking side uses a forcing queen move to drive the enemy king into a tighter box, then finishes with a second wave of checks. The key idea is not material gain, but coordination between queen and rook to create an unavoidable long mate. In classical chess, these patterns often appear when the king has weakened shelter and one defender is overloaded or trapped.