CHALLENGES BY 1799, THE CRYPTOGRAPHER.FROM MANUSCRIPT CRYPTONIKI .
Saturday, October 28, 2023
CHALLENGE 5759[UNSOLVED ]
Saturday, June 17, 2023
CHALLENGE 5678.1 [UNSOLVED]
Wednesday, June 7, 2023
CHALLENGE 5669.1 [UNSOLVED]
Sunday, May 28, 2023
CHALLENGE 5489.1 [UNSOLVED]
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