Learn How to Spot Mate in 2: Back Rank Mate
This chess endgame puzzle shows how a seemingly active defense can collapse when the king has no flight squares. White’s pieces coordinate to exploit a pinned defender and the vulnerable back rank, creating a forcing mating net. The key idea is not material gain but geometry: one forcing check draws the king into a worse square, and the follow-up uses a line piece to finish the attack. In classical chess, these patterns often appear when rooks are active on open files.