Colle System Puzzle (Rated 1061): Spot a Skewer — Colle

This Colle System puzzle demonstrates how active piece coordination can punish a king that has not secured its position. Material is equal, but Black’s king remains in the center while White’s queen, bishop, and knight point toward vulnerable kingside squares. The key tactical idea combines check, a skewer, and a hanging piece. Rather than retreating an attacked knight, White uses the opponent’s loose king position to create a forcing sequence and gain a decisive advantage.