Queen Rook Endgame Puzzle (Rated 800): Spot Back Rank Mate — Queen Rook Endgame

This puzzle is a classic back rank mate pattern in a queen rook endgame, where the enemy king is boxed in by its own pieces and pawns. Even with heavy material on the board, the decisive factor is king safety rather than raw material. The attacking side uses a forcing check to drive the king onto a vulnerable square, then the rook delivers the final blow on the back rank. These motifs appear often in chess endgame and classical chess positions.