Thanx jojo for the post. I always wanted to know this info.

hey! where's the womens?

nice article..... just as i thought that there were no players lower than 900.

how do i know my approximate rating? does my rating here at chess.com accurate?

waaaaa!!!!

What is a GM norm?

For the raintgs that go from class a-j would those ratings apply to players on this site?

my ultimate goal is to reach 2500... i know i can do it...

I don't see my rating on here. -100

Great article!!

http://math.bu.edu/people/mg/glicko/glicko2.doc/example.html

This is the most updated version of the chess rating formulas.  It's called the Glicko-2 system.

How are points calculated? Does anyone have a link that explains this in detail?

 Thank you

kool

I can't tell about the National Amateur US Classes, but those others are inaccurate. Requirements:

 

GM

- To have at least 2 GM norms with a total of at least 27 games, which require a certain number of titled players and a performance rating of 2600.5 or higher.

- To ever have had a published FIDE rating of 2500 or higher

 

IM

- To have at least 2 IM norms with a total of at least 27 games, which require a certain (lower) number of titled players and a performance rating of 2450.5 or higher.

- To ever have achieved a published FIDE rating of 2400 or higher.

 

FM

- To ever have achieved a published FIDE rating of 2300 or higher (so no # of games requirement)

 

CM

- To ever have achieved a published FIDE rating of 2200 or higher (2000 USCF is not even close to this)

 

Those other titles, "SM" and "NM" are not international titles, and requirements for such titles are different in each country. You also won't find such titles on the FIDE rating site.