New rating system

[adum]

so i've updated the site with a new rating system for problem solvers: you start at 30 kyu, and work your way up as high as you can by solving new problems. i think this should be fun as well as educational.

let me know how this feels for people -- and if the ratings seem appropriate for the difficulty of the problems.

note: your old rating graphs were based on a different starting point. they now start at 30 kyu.

(this is using the Elo rating system for both problems and users.)

[kaf]

Nice improvement, Adum!
The hardest is to get through 10k-2k problems. Apparently, most of invalid problems fall into this range.

[adum3]

let's get rid of the invalid problems!

[kaf]

Interesting fact, - if I edit a problem or look at the comments without solving it first, - my rating goes down. So, in order to fix an invalid problem, one has to sacrifice his rating. No wonder I'm still a 31k.

[adum]

hmmn, i can try to modify that behavior for editors

[kaf]

Honestly, I don't hang on my rating. That was meant as a joke. Overall, it's a good idea to spice up the site. Let's not make it unnecessarily complicated.

[GeoGo]

I don't really get this ranking - initialy I was jumping between 30 and 19 kyu. Now I stuck on 25 and despite solving lot of old problems I can't move up.