Hello Codeforces,

Recently, I've created CF Wizard, a tool to predict problem difficulties as well as a website that stores problems from the codeforces gym and assigns them ratings. Check it out at https://cfwizard.com. It allows you to input your handle to shade solved problems green as well as filter problems within a certain range.

To generate problem difficulties, I developed a model you can find here although I use user predictions instead if they exist. Obviously, the model is not 100% correct, so please report any problems whose given rating may be more than 100-200 points off from its actual rating. Generally, contests will be added if they have 50 or more live or virtual participants.

The model is actually pretty good at predicting difficulties for Div 2 contests, so feel free to try it out after the next contest ends :)

Looking for Help

It would be greatly appreciated if you have any official rating estimations from some gym contests. If so, feel free to DM me on codeforces or comment below. Also, if you want to help add contests/give rating estimations, feel free to DM me on codeforces as well.

Please note that this project is still in its alpha stages, so any feedback or suggestions would be greatly appreciated. Happy coding!