Conduct more challenges/contests

Codechef conducts a challenge every week on Wednesday only, it should conduct more contest
Giving coders frequent chances to improve their rating.


Or you could practice more and perform better by solving more questions fast and get better rank hence better rating?

Read the ELO-MMR rating system then you will understand what I am trying to say.

@nitinmalviya - even with ELO MMR - when you perform well, rating changes can happen fast.