Wall to Wall

Pegatory Knockout (or "Wall to Wall" in its initial appearance) is a recurring Survivor challenge.

Rules
The challenge features three rounds of elimination. In the first round, the castaways must dig until they find a wooden peg which they will use to navigate a maze. The first five to finish move on to the second stage of the challenge. In the second stage, the castaways will use four pegs to navigate a wall. The first three to finish move on to the final stage, where the first person to complete a sliding puzzle will win Immunity.

History
The challenge was first used in Survivor: Panama, where it did not feature round-by-round elimination and was used for the final Reward Challenge.