The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 2 challenge The T52 Sturgeon Challenge — Part 3
Solved Level 2 challenge The T52 Sturgeon Challenge — Part 2
Solved Level 2 challenge The T52 Sturgeon Challenge — Part 1
Solved Level 1 challenge A disguised code
Solved Level 1 challenge Autokey Cipher
Solved Level 1 challenge Find the right route — Part 1
Solved Level 1 challenge Letter from the Alleged Countess Julie von Ortenburg
Solved Level 2 challenge Twisting the Rubik's Cube
Four degrees of difficulty, from pen & paper to complex mathematical problems