Learn How to Back Rank Mate: Tactical Finish
This puzzle shows how a seemingly active position can collapse when the king has no flight squares and the back rank is vulnerable. The key idea is a forcing tactical sequence that uses a checking move to drag the king into a worse square, then a rook-based finish on the open file. The position also features a discovered attack and a double-check feel, where one piece’s move unlocks another attacker. In practical terms, the defender is overloaded and the king is boxed in.