Learn How to Spot Mate in 1: Hanging Piece Tactic
This puzzle is a classic middlegame tactical finish where a loose piece on the e-file creates an immediate mating net. The key idea is that active rooks on open files can become decisive when the enemy king has limited escape squares and one defender is overloaded or pinned. Even in a materially lopsided position, tactics can override static evaluation when the king is exposed to a direct line attack.