Grading Limits - Old -> New

General discussions about ratings.
Michael Bennett
Posts: 157
Joined: Sun Sep 07, 2008 12:31 am

Grading Limits - Old -> New

Post by Michael Bennett » Wed Sep 09, 2009 9:37 am

Hi there - I have a question for our forum statisticians if you're able to help...

Q. For 'old grade' limits U100, U125, U130 and U160 in tournaments or leagues, what would be sensible new grade limits? I'm specifically interested in these limits as they are present in leagues and tournaments I participate in.

Thanks in advance to anyone who can advise on this.
Michael Bennett
Hendon Chess Club: http://www.hendonchessclub.com
Golders Green Rapidplays: http://www.goldersgreenchess.blogspot.com

Alex Holowczak
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Location: Oldbury, Worcestershire

Re: Grading Limits - Old -> New

Post by Alex Holowczak » Wed Sep 09, 2009 10:00 am

I have the entry forms for two tournaments in front of me. One has gone from 90/120/160/200 to 120/150/175/210. The other has gone from 90/120/160/Open to 125/150/175/Open. That would suggest somewhere in the region of 125/150/160/175 for your four section limits.

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John Upham
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Joined: Wed Apr 04, 2007 10:29 am
Location: Cove, Hampshire, England.

Re: Grading Limits - Old -> New

Post by John Upham » Wed Sep 09, 2009 10:02 am

There should be three new sets of rating limits :

1. Adults who were rated last season
2. Adults who were unrated
3. Juniors regardless of rating history :D
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Matthew Turner
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Joined: Fri May 16, 2008 11:54 am

Re: Grading Limits - Old -> New

Post by Matthew Turner » Wed Sep 09, 2009 10:05 am

I would endorse the comments of the previous two contributors. Alex probably has given the best possible grading limits. However, in some cases there is a serious disconnect between different groups of players.

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Dean Madden
Posts: 39
Joined: Fri Apr 20, 2007 1:06 pm
Location: Birmingham

Re: Grading Limits - Old -> New

Post by Dean Madden » Wed Sep 09, 2009 10:10 am

The average increases are:
Adult New Grade = 0.81 x Old Grade + 43
Junior New Grade = 0.84 x Old Grade + 45

Michael Bennett
Posts: 157
Joined: Sun Sep 07, 2008 12:31 am

Re: Grading Limits - Old -> New

Post by Michael Bennett » Mon Nov 02, 2009 11:23 am

Thanks to everyone for your advice!
Michael Bennett
Hendon Chess Club: http://www.hendonchessclub.com
Golders Green Rapidplays: http://www.goldersgreenchess.blogspot.com