Learn How to Win Material: Discovered Attack
This chess endgame puzzle shows how a single active rook can create a discovered attack that changes the evaluation immediately. White’s rook activity is the key: by stepping onto the right square, it opens a line for the bishop to hit a vulnerable target while also giving check. In classical chess, these forcing moves are especially powerful when the enemy king is exposed and pieces are loose. The result is a winning tactical sequence, not a slow positional squeeze.