rating system

Does chess.com use the ELO rating system or some other?

Chess.com uses the "Some Other" system, also known as, "SO?" It's quite accurate

At any rate, it's better than the Electric Light Orchestra rating system.

I believe that chess.com uses the Glicko system, not ELO.

Nobody used ELO.

Thank you  browni3141!

The site uses Glicko, named after Mark Glickman. It does not use Elo named after Arpad Elo. Nobody use ELO.

http://support.chess.com/Knowledgebase/Article/View/16/0/how-do-ratings-work  leads  to http://www.chess.com/article/view/chess-ratings---how-they-work

Actually, chess.com does not implement Glicko, and most other sites that claim to don't either. Here is Mark Glickman's specification of the Glicko system:

http://www.glicko.net/glicko/glicko.pdf

As you can see in that paper, one of the essential features of Glicko is that rating adjustments are performed in batches at the end of discrete rating periods, which are separated by uniform time intervals. Only at the end of a rating period does your rating change. Players who are inactive for one or several rating periods see an increase in their RD, which means that when they become active again their rating will move around more quickly than before.

In general, if a site assigns you a new rating immediately after you finish a game, but they tell you that they're using a Glicko rating system, they're lying to you! Their system may be Glicko-inspired, it may use many of the same equations as Glicko, it may even be better than Glicko, but it isn't Glicko!

I may have met my match.

elo, elo, elo, what 'ave we 'ere then?

ICC uses Elo.

Sherlock Holmes uses 'elo

No, that would be Sherlock 'olmes. :p

Elementary,my dear Watson! When you have eliminated the impossible, whatever remains, however improbable, must be possible.

that's impossible

Not if you've used the 7% solution. 

So does FIDE use Elo. Nobody uses ELO.

I use ELO.

I collect ELO.