Cryptogram
Decode an original short sentence using a one-to-one letter substitution.
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How to play
Enter a decoded letter under each cipher letter. The same cipher always means the same plain letter; two different ciphers cannot map to the same plain letter. Spaces stay visible.
Use the feedback
Attempt an answer before looking at a hint or explanation. If it differs from the expected answer, compare the reasoning one step at a time. For a number problem, substitute your result back into the question. For a passage, point to the words that support your interpretation.
About this activity
These compact puzzles are practice activities, with a deliberately small board or sequence. They are not a complete catalogue of tournament puzzles. There is no timer or competitive ranking. Correct-answer counts describe this task only.
Some puzzles can have more than one valid solution; grid checks accept any solution that meets the displayed constraints. Hints follow a known example solution. Familiarity, hints and previous attempts affect performance.
Keep exploring
Explore the original brain games · Learning guides
Original examples and code created with AI assistance. No IQ, diagnostic or therapeutic interpretation is provided.