Over the last several months the Codeforces team has been looking anxiously at the inflation in the rating caused by both an influx of new users and the imperfect calculating formulas.
In the end it lead to noticeable shifts in colors and titles. For example, getting red in 2015 became much easier than in 2013.
We conducted a survey about the way to introduce the color bounds. We are happy to announce the updated colors and titles!
A summary of the main changes goes like that:
- a new color: greenish-blue color or cyan — just like the name implies, this color takes its place between green and blue, now the participants of the second division will be better differentiated;
- all the colors shift upwards along the rating scale — see the table below. Now reaching the top positions will be harder;
- the legendary grandmaster — the new title and color for those who reached the sky high rating 2900.
The cold colors (gray, green, cyan and blue) still correspond to the second division and the other ones correspond to the first one.
The requirements to the coach rights haven't changed — you've got to have 2200 or 1900 and a rich history of participations in order to become a coach. Problem tags and groups can be added by the participants from the first division.
The table below illustrates the new values of the color and rank borders:
|Rating Bounds||Color||Title||Division||Number||Number (by color)|
|2600 — 2899||Red||International Grandmaster||1||46|
|2400 — 2599||Red||Grandmaster||1||133|
|2300 — 2399||Orange||International Master||1||163||380|
|2200 — 2299||Orange||Master||1||217|
|1900 — 2199||Violet||Candidate Master||1||1253||1253|
|1600 — 1899||Blue||Expert||2||5095||5095|
|1400 — 1599||Cyan||Specialist||2||8202||8202|
|1200 — 1399||Green||Pupil||2||5736||5736|
|0 — 1199||Gray||Newbie||2||2319||2319|
Active users (who took part in last 6 months) on the moment of October, 1 are counted.
I will write about the changes in the rating formulas as soon as possible, And yes, the formulas will be open!