Restrict session to IP 

For the people not familiar with challenge sites, a challenge site is mainly a site focussed on offering computer-related problems. Users can register at such a site and start solving challenges. There exist lots of different challenge types. The most common ones are the following: Cryptographic, Crackit, Steganography, Programming, Logic and Math/Science. The difficulty of these challenges vary as well.

When I first started out I was familiar with working with a computer, but that was about it. In about 5 years I roamed the internet searching for different kind of challenge sites. I have played at many different sites, did a lot of challenges and I am still learning new (and exciting) stuff.

I also found an IRC network where most of the bigger challenge sites have their own IRC channel. These channels often have bots allowing users to check how other people are ranked at a certain site, or sites. From time to time the screens are filled with these simple requests. That is the reason I started coding this site. It allows the users to get a complete overview of a users challenge history on every site he signed up for. Now how does this work exactly?

A user on this site can indicate which challenge sites he plays at with a specific username. Challenge sites can be selected from a simple drop-down list. His profile page will then contain an entry for this specific challenge site with the given username, along with some text describing how high he is ranked at that site. This will give a complete overview of one user in an instance.

Please forgive me if the list is not complete. There are lots of challenge sites out there and probably lots of them I do not know about. I will try to give a complete list of challenge sites to choose from, and I will also provide a piece of code for challenge site owners so that their site can be listed on this site as well.

Kind regards,



The goal is to make a global ranking for challengers.

Also we like to give an overview of popular challenge sites, and encourage challengers to try them out.

Beside that, WeChall is my coding playground :)


Well, I had this server in a datacenter that was not doing much.. :)

And just like a lot of people, I had thoughts about creating a cross-challenge-site statistics site.

I hope that we can get more people to enjoy playing challenge sites, and provide a starting point to discover other sites than the ones you already play.