Everydle

Math/Logic · DAILY GAME

Mystery Function

Probe a hidden text-transforming function, compare input and output examples, then predict what it will return.

Added to Everydle ·

DailyPatternsText transformations
Mystery Function's fresh daily board showing its supplied text example, an empty input and seven available rows

Play Mystery Function

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This game is played on its official website. The image below is a preview, not an embedded game.

Mystery Function's fresh daily board showing its supplied text example, an empty input and seven available rowsScreenshot preview · Play Mystery Function on the official website ↗
Play on the official website ↗

Play on the official Mystery Function page. Interactive embedding has not been verified.

What is Mystery Function?

Mystery Function gives you one example of an unknown function and a board of seven rows. Type a short string, run it through the function and inspect the output. Each experiment spends a row, so useful tests distinguish competing explanations rather than merely producing another example. When you think you understand the transformation, the I know it control switches from gathering evidence to testing your prediction.

How to play

  1. Open today's puzzle and inspect the supplied example before using your rows.
  2. Enter text in the active input and select Run. Compare the returned string with the exact input, including repeated characters and positions.
  3. Choose another input that could separate two possible rules, while keeping an eye on the remaining rows.
  4. Select I know it when you are ready to predict an output instead of running another probe.

Do you need to write code?

No. The input is ordinary text, not a code editor. Run sends that text through the hidden transformation and displays its output. Programming-style experimentation can help, but entering a small string is enough to begin.

What makes an input useful?

Choose one that distinguishes rules you are considering. Repeated characters can expose position-dependent behavior; changing one character can make a local effect easier to spot. Each submitted probe reduces the remaining row count, so compare the existing examples before spending another.

Make your next move

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