How to solve cryptograms
In a simple substitution, each symbol corresponds to a letter consistently throughout the text.
1. Understand substitution
In a simple substitution, each symbol corresponds to a letter consistently throughout the text. Spaces usually show word boundaries. Before solving, check for given letters, a partial key or additional rules.
2. Make a key table
Keep a table of symbols and proposed letters. If circle = A, apply A to every circle in the message. In a one-to-one key, do not assign one letter to two different symbols. Distinguish confirmed letters from guesses.
3. Notice repeated patterns
A word with pattern A–B–A has matching first and last letters. EYE and DID both have that pattern, but context and other substitutions determine which could fit a message. Pattern labels A and B do not mean the hidden letters must literally be A and B.
4. Use short words carefully
A one-letter English word may be a or I; test the surrounding sentence before choosing. Spanish also has one-letter words such as a, y, o and e. Symbol frequency suggests possibilities, but a short message may not reflect overall language frequencies.
5. Test a guess throughout the text
After proposing a word, apply every new substitution to its other occurrences. If it produces an impossible word or contradicts a confirmed letter, undo the guess. Do not change the key in one location to preserve an appealing answer.
6. Verify the message and key
Read the full sentence and compare every letter with its original symbol. A meaningful sentence can still contain a substitution error. Check punctuation and repeated letters as well. For further practice, prepare a short message with familiar vocabulary and keep its key separate.