Rook Endgame Puzzle (Rated 1199): Promote a Passed Pawn — Chess Endgame Puzzle

In this chess endgame, the key idea is to use an advanced passed pawn as a forcing weapon. When a pawn reaches the seventh rank, it often becomes stronger than extra material because it creates immediate promotion threats and restricts the enemy rook and king. In rook endgames, activity matters more than count, so the side with the more dangerous passer can often dictate the result. This is a classic example of converting a passed pawn into a decisive advantage.