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Straddle Checkerboard Cipher

Variable-length substitution cipher using two spare digit rows.

The straddling checkerboard is a substitution cipher where letters encode to one or two digits. Its key is a permutation of the alphabet plus two spare digit positions. See Wikipedia for more information.

Straddle checkerboard example

Enter a keyword, phrase, or alphabet and the rest will be calculated for you.

Checkerboard