Defensive Move Intermediate Puzzle (Rated 1307): Win a Queen Endgame — Crushing Defensive Move

This chess endgame is a classic example of using a forcing queen move to simplify into a winning king-and-pawn race. The key idea is to exploit the exposed king, the advanced passed pawn, and the loose coordination of the enemy queen. In classical chess, these positions often hinge on whether you can trade queens at the right moment and convert the resulting king activity into a decisive material edge.