Learn How to Spot Mate in 1: Mating Net
This middlegame puzzle is a classic example of a mating net: the enemy king is boxed in, key escape squares are controlled, and one forcing move ends the game immediately. In positions like this, material matters far less than king safety and piece coordination. Even if one side is down in material, a direct check can override everything when the king has no legal flight squares and its defenders are overloaded or pinned.