Ratings

Forum Archive : Ratings

 
FIBS vs. GamesGrid ratings

From:   Raccoon
Address:   racgammon@yahoo.com
Date:   4 March 2006
Subject:   FIBS ratings en briefe
Forum:   GammOnLine

Saturday March 4, 2006

FIBS Rating List

Rated players:    6618

Highest rating:   2284
Top 10% rating:   1742
Top 25% rating:   1627
Median rating:    1516
Lowest rating:     -19

Gamesgrid Rating List

Rated players:    1569
Highest rating:   2346
Top 10% rating:   1795
Top 25% rating:   1718
Median rating:    1621
Lowest rating:     948

Chuck Bower  writes:

If I were Gamesgrid I'd feel funny about the 1615 median. Isn't '1500'
the universal norm, even regardless of the actual game?

Rob Adams  writes:

Gamesgrid has some other features that lead to a higher median rating.

(1) They have regular tournaments ... several a week ... where lower
rated players can win and have their ratings reset to 1500. For most
this is a small boost, for others a huge one. And there is no
corresponding loss of course.

(2) Sometimes they add people in NOT at 1500, but at somewhat higher
depending on real-life strength or their performance on other servers.
Like if you (Chuck) wanted to start at a 1700 gamesgrid rating for
instance, I bet you could email them and they'd agree. And, of course,
they don't add people in at a rating below 1500 (that I'm aware of).

Raccoon  writes:

> Isn't '1500' the universal norm, even regardless of the actual game?

I believe it's nearly universal among backgammon sites/organizations.
DBgF uses a 1000 start rating. I've a vague recollection that one site
used a 1600 start rate.

Site       Players   Highest     10%     25%     50%    Lowest

FIBS         6618      2284     1742    1627    1516      -19
DailyGammon  4473      2217     1776    1575    1449      644
Gamesgrid    1569      2346     1795    1718    1621      948
DBgF          797      1784     1654    1595    1524     1266
SBgF          224      1784     1631    1574    1517     1319
BIBA          113      2011     1815    1717    1604     1248
NBgF          127      1828     1744    1669    1538     1058
Gammonitis     90      1754     1651    1588    1502     1156

Notes:

March 4-6, 2006
DBgF: starting rating is 1000, so 500 points have been added.
BIBA: active members only
 
Did you find the information in this article useful?          

Do you have any comments you'd like to add?     

 

Ratings

Constructing a ratings system  (Matti Rinta-Nikkola, Dec 1998) 
Converting to points-per-game  (David Montgomery, Aug 1998)  [Recommended reading]
Cube error rates  (Joe Russell+, July 2009)  [Long message]
Different length matches  (Jim Williams+, Oct 1998) 
Different length matches  (Tom Keith, May 1998)  [Recommended reading]
ELO system  (seeker, Nov 1995) 
Effect of droppers on ratings  (Gary Wong+, Feb 1998) 
Emperical analysis  (Gary Wong, Oct 1998) 
Error rates  (David Levy, July 2009) 
Experience required for accurate rating  (Jon Brown+, Nov 2002) 
FIBS rating distribution  (Gary Wong, Nov 2000) 
FIBS rating formula  (Patti Beadles, Dec 2003) 
FIBS vs. GamesGrid ratings  (Raccoon+, Mar 2006)  [GammOnLine forum]
Fastest way to improve your rating  (Backgammon Man+, May 2004) 
Field size and ratings spread  (Daniel Murphy+, June 2000)  [Long message]
Improving the rating system  (Matti Rinta-Nikkola, Nov 2000)  [Long message]
KG rating list  (Daniel Murphy, Feb 2006)  [GammOnLine forum]
KG rating list  (Tapio Palmroth, Oct 2002) 
MSN Zone ratings flaw  (Hank Youngerman, May 2004) 
No limit to ratings  (David desJardins+, Dec 1998) 
On different sites  (Bob Newell+, Apr 2004) 
Opponent's strength  (William Hill+, Apr 1998) 
Possible adjustments  (Christopher Yep+, Oct 1998) 
Rating versus error rate  (Douglas Zare, July 2006)  [GammOnLine forum]
Ratings and rankings  (Chuck Bower, Dec 1997)  [Long message]
Ratings and rankings  (Jim Wallace, Nov 1997) 
Ratings on Gamesgrid  (Gregg Cattanach, Dec 2001) 
Ratings variation  (Kevin Bastian+, Feb 1999) 
Ratings variation  (FLMaster39+, Aug 1997) 
Ratings variation  (Ed Rybak+, Sept 1994) 
Strange behavior with large rating difference  (Ron Karr, May 1996) 
Table of ratings changes  (Patti Beadles, Aug 1994) 
Table of win rates  (William C. Bitting, Aug 1995) 
Unbounded rating theorem  (David desJardins+, Dec 1998) 
What are rating points?  (Lou Poppler, Apr 1995) 
Why high ratings for one-point matches?  (David Montgomery, Sept 1995) 

[GammOnLine forum]  From GammOnLine       [Long message]  Long message       [Recommended reading]  Recommended reading       [Recent addition]  Recent addition
 

  Book Suggestions
Books
Cheating
Chouettes
Computer Dice
Cube Handling
Cube Handling in Races
Equipment
Etiquette
Extreme Gammon
Fun and frustration
GNU Backgammon
History
Jellyfish
Learning
Luck versus Skill
Magazines & E-zines
Match Archives
Match Equities
Match Play
Match Play at 2-away/2-away
Miscellaneous
Opening Rolls
Pip Counting
Play Sites
Probability and Statistics
Programming
Propositions
Puzzles
Ratings
Rollouts
Rules
Rulings
Snowie
Software
Source Code
Strategy--Backgames
Strategy--Bearing Off
Strategy--Checker play
Terminology
Theory
Tournaments
Uncategorized
Variations

 

Return to:  Backgammon Galore : Forum Archive Main Page