Rook Endgame Puzzle (Rated 1135): Win with Discovered Check — Endgame Tactics

This chess endgame is a classic example of how a discovered check can force the king into a losing square while a passed pawn decides the race. The key idea is not raw material, but coordination: the rook, king, and advanced pawn work together to create a tactical net. In classical chess, these positions often look calm, yet one forcing move can transform the position into a winning promotion race or a decisive rook endgame conversion.