Check this site out:
http://deathball.net/notpron/
It's a massive online browser using Riddle! It's difficult to say the least. In face, It claims to be the Hardest!
So, how far can you go before you give up? Lol
Well, I've been on this thing for an hour or so and only managed to get to level 6. I can't seem to get past it.
Is there any of you smart cb players want to help me?