Learn How to Spot Mate in 1: Ruy Lopez Tactic
This middlegame puzzle comes from the Ruy Lopez Exchange Variation and shows how quickly a seemingly active position can collapse when the king is unsafe. The key idea is a classic mating net: one side’s heavy piece invades an open file, and the defender’s pieces are too tied up to respond. Even with material balance close to equal, king safety can outweigh everything else when the back rank and escape squares are restricted.