weffriddles
There's plenty of the riddle challenge sites out there, and here's one that's driving me crazy. There's constantly new levels being added from what I can tell, though I'm not fully sure. (Edit: Looks like it ends at level 79, though I'm not there yet)
PLEASE DO NOT GIVE AWAY ANSWERS IN THIS THREAD - ONLY HINTS.
Discuss, and good luck, it's tough, you're going to need to really think to do this, and Google is your friend for a lot of the hints it gives you, keep that in mind.
I'm on the 'Pre-riddle' to level 59, and I'm stumped.