Learn How to Spot: Morphy's Mate
This puzzle is a classic mating net in the middlegame, where one bishop move finishes the game immediately. The key idea is that the enemy king has limited escape squares, and a long diagonal becomes decisive because the defender cannot interpose or capture in time. Even with a large material deficit, the attack matters more than material when the king is boxed in and the final checking piece is already aimed at the target square.