My first Variant Beaufort
Introduction
This is a repeating-key Variant Beaufort cipher. Begin by estimating the period from repeated-sequence spacings, then inspect the corresponding Periodic columns. Each column uses one Key letter. Make a likely plaintext-letter guess from frequency or a reliable crib, number A as 0 through Z as 25, and subtract the ciphertext value from the guessed plaintext value modulo 26; the result is that column's candidate Key letter. Assemble the letters in column order, enter the candidate in Variant Beaufort transform, choose Decrypt, and Run. If only particular periodic positions fail, revise those column letters; if every column is weak, reconsider the period. Submit only when the Result reads correctly throughout.
Find recurring Latin-letter groups and their gaps.
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Latin letters · 7 phases
Apply Variant Beaufort with a Solver-supplied keyword.