Forum Archive : Ratings

FIBS rating distribution From:   Gary Wong Address:   gtw@research.att.com Date:   2 November 2000 Subject:   Re: FIBS Ratings Report From 10/02/2000 To 11/01/2000 Forum:   rec.games.backgammon Google:   dh6y9z25ntx.fsf@pc-gtw.research.att.com > Does anyone know the FIBS player rating distribution? > It would be interesting to know how many players are in each 50 ELO > bracket. You can figure it out with the "ratings" command and a little bit of work: players rated >2000: 8 1950-2000: 27 1900-1950: 56 1850-1900: 125 1800-1850: 204 1750-1800: 267 1700-1750: 377 1650-1700: 485 1600-1650: 642 1550-1600: 812 1500-1550: 858 1450-1500: 883 1400-1450: 714 1350-1400: 471 1300-1350: 317 1250-1300: 212 1200-1250: 106 1150-1200: 79 1100-1150: 28 1050-1100: 28 1000-1050: 10 <1000 : 14 Here is a histogram of those figures: ^ players| 900+ ++ | ## ## 800+ ## ## ## | __ ## ## ## 700+ ## ## ## ## | ## ## ## ## ## 600+ ## ## ## ## ## | ## ## ## ## ## 500+ __ ## ## ## ## ## ++ | ## ## ## ## ## ## ## 400+ ## ## ## ## ## ## ## ++ | __ ## ## ## ## ## ## ## ## 300+ ## ## ## ## ## ## ## ## ## __ | ## ## ## ## ## ## ## ## ## ## 200+ ## ## ## ## ## ## ## ## ## ## ## ## | ## ## ## ## ## ## ## ## ## ## ## ## ++ 100+ ++ ## ## ## ## ## ## ## ## ## ## ## ## ## ## | ++ ++ ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ++ 0+//|--+--|--+--|--+--|--+--|--+--|--+--|--+--|--+--|--+--|--+--|--> 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 rating Daniel Murphy posted some related information in an article archived at: http://www.deja.com/=dnc/getdoc.xp?AN=645257677 Jim Wallace shows a couple of results from 1995 and 1997 which seems to indicate that the distribution has been relatively consistent (i.e. the histogram above has been stretching vertically over the years, as players join FIBS, but we have no evidence that there has been significant change in the _proportion_ of players in each bracket): http://www.bkgm.com/rgb/rgb.cgi?view+416 Cheers, Gary. -- Gary Wong Consultant, Dependable Distributed Computing, AT&T Shannon Labs gtw@research.att.com http://www.cs.arizona.edu/~gary/   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) 

Cube error rates  (Joe Russell+, July 2009) 

Different length matches  (Jim Williams+, Oct 1998) 

Different length matches  (Tom Keith, May 1998) 

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) 

Fastest way to improve your rating  (Backgammon Man+, May 2004) 

Field size and ratings spread  (Daniel Murphy+, June 2000) 

Improving the rating system  (Matti Rinta-Nikkola, Nov 2000) 

KG rating list  (Daniel Murphy, Feb 2006) 

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) 

Ratings and rankings  (Chuck Bower, Dec 1997) 

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) 

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