Opera Mate Intermediate Puzzle (Rated 969): Mate in 2 — Back Rank Mate

This puzzle is a classic chess endgame-style mating net where the attacking side uses a rook to force the enemy king into a narrow corridor. The key idea is to create a direct check that leaves the king with only one legal response, then finish with a second rook move that seals every escape square. Even though material is down, king safety is overwhelming, which is often the deciding factor in classical chess tactics.