Learn How to Spot Opera Mate: Endgame Mate
This puzzle is a classic example of an opera mate style finish in a chess endgame: the attacked king is boxed in by its own pieces and pawns, and a single forcing move ends the game immediately. Even though the material is balanced, king safety is the deciding factor. The key idea is to notice when the enemy king has no escape squares and a line piece can deliver direct mate because the surrounding defenders are overloaded or pinned.