Learn How to Spot a Corner Mate: Mate in 1
This middlegame puzzle comes from the Ruy Lopez Berlin Defense and shows how quickly king safety can collapse when the enemy king is boxed in near the corner. The key idea is a classic corner mate pattern: a single knight move creates an immediate mating net, exploiting weak squares around the king and the lack of escape squares. Even in classical chess, a position can look materially balanced while one tactical shot ends the game instantly.