Deviation of Rating Differences - OzChess

**Jaz** · 01-19-2009, 06:23 PM

Can any of you please explain what is "deviation of rating differences" all about. I see so many of you discussing about it so I have little doubt it is important and I want to know what it is so I can have a say on these things too (Although I might not do that at first, because it sounds very complicated you know, is it? I challenge you to try me

**Axiom Support Group** · 01-19-2009, 06:49 PM

Originally Posted by Jaz

Can any of you please explain what is "deviation of rating differences" all about. I see so many of you discussing about it so I have little doubt it is important and I want to know what it is so I can have a say on these things too (Although I might not do that at first, because it sounds very complicated you know, is it? I challenge you to try me

You probably mean rating differential, or RD. Basically a person's RD is a number that gets used in calculating their rating. Chess players are given rating which go up or down based on their performance in playing other rated players.

**Jaz** · 01-19-2009, 07:09 PM

Thanks mate, it all makes perfect sense now. I guess deviance is a statistical term for calculating an even more accurate rating by going through lots of rated games. Just tell me if I'm wrong.

01-19-2009, 06:23 PM	#1 (permalink)
Jaz Member Join Date: Jan 2009 Posts: 87	Deviation of Rating Differences Can any of you please explain what is "deviation of rating differences" all about. I see so many of you discussing about it so I have little doubt it is important and I want to know what it is so I can have a say on these things too (Although I might not do that at first, because it sounds very complicated you know, is it? I challenge you to try me

01-19-2009, 06:49 PM	#2 (permalink)
Axiom Support Group Senior Member Join Date: Aug 2008 Location: Laku, Ishmaelia Posts: 141	Originally Posted by Jaz Can any of you please explain what is "deviation of rating differences" all about. I see so many of you discussing about it so I have little doubt it is important and I want to know what it is so I can have a say on these things too (Although I might not do that at first, because it sounds very complicated you know, is it? I challenge you to try me You probably mean rating differential, or RD. Basically a person's RD is a number that gets used in calculating their rating. Chess players are given rating which go up or down based on their performance in playing other rated players.

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01-19-2009, 07:09 PM	#3 (permalink)
Jaz Member Join Date: Jan 2009 Posts: 87	Thanks mate, it all makes perfect sense now. I guess deviance is a statistical term for calculating an even more accurate rating by going through lots of rated games. Just tell me if I'm wrong.