Chess Changes???

what! really??? its good...

you can have two players of a similar rating but the the average win opponent is much greater. the RD doesnt help with this difference in skill...

maybe i'm missing something. Please explain?

RD tells you if someone who is rated 1500 is very close to 1500 (small RD) or somewhere in the 1200-1800 range (high RD). Average opponent is a flawed statistic in it's own right: if 2 players are exactly of the same skill level, and only plays only 1200 players while the other plays 1800 players, their rating should still be about the same. Moreso, I was in the 1200-1400 range on this site from Nov08 to about Nov10, 2 years, and had a very high Avg Opp for my rating - somewhere around 1500. Now in the last couple months I have gone up significantly in rating, and yet because of the small sample size since I've been at this rating, my Avg Opp is now much less than my rating - still about 1500.

i understand the principle of the RD, i'm just saying it isn't as clear cut.

Player A: 1500 Rating, Avg Opp 1300
Player B: 1500 Rating, Avg Opp 1700

In this case, it is impossible to tell which of the two players is better, and equally impossible to tell which of the two has a more accurate rating.

Player C: 1500 Rating, 20 Glicko RD
Player D: 1500 Rating, 200 Glicko RD

In this case, it is still impossible to tell which of the two is better, but it is obvious at face value which rating is more accurate.

We seem to have drifted off the point. There were various stats available which have been removed without warning. Some of us have protested about the lack of advance warning when a change has been made which can in no way be said to be an improvement.  Erik has said there is no time for the programmers to reinstate the missing stats. I'm still not sure whether most of us are hoping for (1) The same information available as we had before; (2) some indication in future when a similar change is about to be made or (3) we don't care, let's just play chess. For myself, I want (1) and (2), but I get the impression I'd be advised not to hold my breath waiting. 

Perhaps the Avg Opp stat could be replaced with an average opponent difference stat?

you mean as a + or - difference?  I think yes, that would be much more meaningful, and correct for the problem of what happens when you have played a lot of games and get better, such that one's rating rises faster than one's average opponent rating.....

partner?

when did this happen? It's not affecting me...

so no update on the updates?

Nope...

I know the av moves per game stat vanished sometime back,but does anyone know a date for the stats that were more recently removed.

many tks.

AND.................secondly,have the "my completed tournaments" stat page been affected by removals as I appear to have lost some results,your comments would be appreciated,tks.

Yes. why-is-chesscom-going-offline-soon

Hurrah,the reinstatements.

No not on this maintainance schedule,we wait eagerly for an advisory.

Could someone please advise me.On "my completed tournaments" some now appear missing is this another part stat that has been removed or a bug that needs to be removed,your comments would be appreciated.

I liked that one too.