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StringMash Daily #13

Thursday 15 October 2026 · Medium-hard · Keyword substitution. Any day's puzzle can be played, and counts as solved.

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    About puzzle #13

    Puzzle #13 is the one for Thursday 15 October 2026: a medium-hard Thursday puzzle, in Keyword substitution. The keyword's letters start the cipher alphabet and the rest follow in order, so A becomes the keyword's first letter. Once you have a few letters, the keyword shows through.

    Stuck? The Keyword substitution decoder is fair to use, and Hint fills in one letter at a time. A new puzzle opens every day at midnight where you are, at StringMash Daily, and every earlier one is in the archive under the puzzle.