From Jotto to Onedle

Onedle comes from a long line of word and code-breaking games built around the same idea: feedback that tells you how close a guess was.

Jotto

Jotto, a pencil-and-paper game from the 1950s, is one of the earliest word games of this kind. Each player picks a secret five-letter word; on each turn you guess a word and learn how many letters it shares with your opponent's word, but not which ones. Working out the secret takes careful bookkeeping across many guesses, which is exactly the skill Onedle exercises.

Mastermind

The board game Mastermind, invented by Mordecai Meirowitz and released in the early 1970s, replaced words with colored pegs. A codemaker hides a sequence of colors, and each guess is answered with pegs showing how many colors are right and in the right position, and how many are right but in the wrong position. Those two kinds of feedback are the ancestors of green and yellow.

Lingo

Television brought the idea back to words. On the game show Lingo, first broadcast in the United States in 1987, contestants guessed five-letter words and saw letters marked as correct or present in the wrong position, much like the colored tiles used today.

Wordle

Wordle, created by Josh Wardle and released to the public in October 2021, combined that feedback with a single shared puzzle each day and a spoiler-free way to share results. It spread quickly and was acquired by The New York Times in early 2022. Its green, yellow and gray tiles, and their exact rules for repeated letters, have become a shared language for word-game players.

Onedle

Onedle keeps Wordle's feedback rules but reverses the roles. In Wordle you choose the guesses and the game supplies the colors. In Onedle, the guesses and colors are given, and you work backward to the one word they point to. That removes luck from the opening and turns each puzzle into a compact logic problem, closer in spirit to a crossword clue or a pencil puzzle than to a guessing game.

Puzzles are chosen so that exactly one common English word fits all the clues. Daily puzzles step from easy to hard within each triplet, and a bonus triplet stretches the idea to six, seven and eight letters.