RatingHistogramComparisons

   

Table comparing the histograms of various rating systems

http://img522.imageshack.us/img522/6735/ratingcomparisonsg5.png?alignright.png

This table compares what rating you need to be in Xth percentile of the players in the four rating systems depicted on the graph.

  %       AGA      KGS      USCF    EGF
 ---   | ------ | ------ | ----- | ----- |
  1%   | -34.61 | -24.26 |   444 |   100 |
  2%   | -32.58 | -22.30 |   531 |   100 |
  5%   | -27.69 | -19.20 |   663 |   153 |
 10%   | -23.47 | -15.36 |   793 |   456 |
 20%   | -18.54 | -11.26 |   964 |   953 |
 30%   | -13.91 |  -8.94 |  1122 |  1200 |
 40%   |  -9.90 |  -7.18 |  1269 |  1387 |
 50%   |  -7.10 |  -5.65 |  1411 |  1557 |
 60%   |  -4.59 |  -4.19 |  1538 |  1709 |
 70%   |  -1.85 |  -2.73 |  1667 |  1884 |
 80%   |   2.10 |  -1.28 |  1807 |  2039 |
 90%   |   4.71 |   2.52 |  1990 |  2217 |
 95%   |   6.12 |   3.88 |  2124 |  2339 |
 98%   |   7.41 |   5.29 |  2265 |  2460 |
 99%   |   8.15 |   6.09 |  2357 |  2536 |
 99.5% |   8.70 |   7.20 |  2470 |  2604 |
 99.9% |   9.64 |   pro  |  2643 |  2747 |
 top   |  10.12 |    9p  |  2789 |  2809 |

The image to the right plots the same data in a graph.

Note: There is an artificial cutoff point at 20k in EGF ratings, which distorts the EGF graph line for 1% and 2%. The 99.9% and top rating for KGS have been estimated as 2850 (8.5 dan amateur) and 3000 (10 dan amateur). The superposition of the Elo (left hand side) and Dan/Kyu (right hand side) scales are based upon EGF assignments. The EGF defines 100 Elo to be 20k.

Usage Example: You have rating 2000 USCF, and are curious what that is equivalent to in go. Find the point where the USCF graph crosses 2000, which is at about 90%. Then move straight up to see where the other graphs cross that percentile, which is (roughly) 2200 EGF (2 dan), 3 dan KGS and 5 dan AGA.


USCF data: [ext] http://www.geocities.com/siliconvalley/lab/7378/histogra.htm

KGS data: KGSRankHistogram/Data

AGA data: [ext] http://usgo.org/ratings/RatingsQuery.asp? - Ratings updated in or after 2005-11, as of 2007-11-6.

EGF data: [ext] http://gemma.ujf.cas.cz/~cieply/GO/gor.html

The raw data for KGS and USCF ratings are in the form of histogram buckets. I used linear interpolation to get the more accurate numbers. Raw data for AGA and EGF was the entire list, so I simply picked out the Xth percentile player and used that player's rating.

The KGS and AGA ratings are in AGA form.

Related links:

FIDETitlesAndEGFGoRatings

DGSRatingHistogram

KGSRankHistogram

AGARatingHistogram

RankWorldwideComparison

[ext] GoDiscussions thread on EGF data , based on player development file as of Oct 2007

ImprovementStatistics


This is a copy of the living page "RatingHistogramComparisons" at Sensei's Library.
(OC) 2008 the Authors, published under the OpenContent License V1.0.
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