[Art]

Does anyone here fancy solving puzzles? Not those cardboard Jigsaw puzzles but Cryptographic puzzles like when letters or numbers are substituted for the real letters on the message.
If so, here's one you can try to solve. It's been around for almost 30 years and part 4 of it still remains unsolved.
Give it a go but put on your thinking caps...

https://math.ucsd.edu/~crypto/Projects/KarlWang/