MW Codes, Ciphers, and Puzzle Series: The Polybius Square and Tap Code
One of the first armchair hunts my family and I worked on used the Polybius Square as its method of encoding. It was the 2004 Armchair Treasure Hunt entitled A Treasure’s Trove. The Polybius Square, in its most commonly used form, is a 5×5 grid filled with the alphabet. The …