Mate In 2 Puzzle (Rated 1262): Force Mate in 2 — Back Rank Mate
This chess endgame shows how a seemingly active king can still be trapped by coordination between rook and bishop. The key idea is a mating net: one piece gives check, while another controls the escape squares so the king has no flight. In classical chess, these short tactical finishes often come from exposed king safety and a loose back rank. Even in an endgame, a single tempo can decide everything when the defender is overloaded.