Ruy Lopez Winning Tactics For White Puzzle: Pin — Win Material
A pin can turn an apparently defended piece into a tactical target when moving it would expose a more valuable piece behind it. In this position, White must recognize that the attacked queen is not the only urgent issue. A forcing capture with check exploits the alignment of the black knight and rook, creates immediate pressure, and changes the material balance. The broader lesson is to search for forcing moves before retreating an attacked piece.