The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 3 challenge The Heavy T52 Sturgeon Challenge — Part 6
Solved Level 3 challenge The Heavy T52 Sturgeon Challenge — Part 6
Solved Level 3 challenge The Heavy T52 Sturgeon Challenge — Part 5
Solved Level 3 challenge The Heavy T52 Sturgeon Challenge — Part 2
Solved Level 3 challenge The Heavy T52 Sturgeon Challenge — Part 1
Solved Level 2 challenge Alice's Birthday Party (Part 1)
Solved Level 1 challenge Number Sequence
Solved Level 2 challenge Monoalphabetic substitution with camouflage — Part 3
Four degrees of difficulty, from pen & paper to complex mathematical problems