In a since-removed Reddit post, u/mattbattwings2 shared some of the process and even gave this link to the world so players can check it out themselves:
“Hi guys! I recreated WORDLE with just redstone.This build took me 2 days, or about 16 hours of work. It was a super fun little project! I’ve made word processors before, but making a circuit to generate the green and yellow squares was a unique experience. If you’re curious about that circuit works, it’s basically like a 2D matrix where the secret word is on one axis and the guessed word is on the other axis.”
He went on to say that if the diagonal points of the matrix were the same letter, they would show up as green squares. If any of the other points of the matrix were the same letter, they would show up as yellow to indicate that they don’t match.
The creator recommended using a speedup mod, since all the redstone, commands and command blocks can slow the game down significantly.
Other players have recreated similar Wordle constructions, but none quite as detailed as this one. Players can simply visit that link and download the world to try it for themselves. This is not the first time this user has done something incredible with redstone.
