Caro Kann Defense Endgame Offer Sacrifice Puzzle (Rated 1085): Mate — Rook Battery

A rook battery is a powerful attacking setup in which one rook supports another along an open rank or file. In this middlegame puzzle, White uses a forcing check to exploit the black king’s restricted mobility and coordinate heavy pieces on the e-file. The apparent queen sacrifice is not a material error: it deflects a key defender and clears the path for the supporting rook. This illustrates how piece activity and king safety can outweigh a material deficit.