by78 wrote:
Uberdude wrote:
As an example of the unreliability of goratings with few games (and disjoint populations), I was amused to see it ranked Thomas Debarre, the 6d amateur from France above Rin Kaiho 9p from Japan and winner of numerous titles and I think at one point the most pro career wins. For sure Rin is getting old and weaker, but really 6d ama weaker?!
Goratings once had Iyama at world number two! That alone should dissuade anyone who has any common sense to take Goratings seriously. The man behind the ranking is a great programmer, but he's no statistician.
Let's mop the path of our bowls, first
.One problem at least appears to be that the only game results goratings.org has are those in which macelee, on go4go, can find game records of. This means that most of the games included into the database are major title matches, domestic main tournament matches and main draw international matches.
This leaves out many smaller preliminary matches which are (un)surprisingly important in determining relative strength between player's lower down in the rating list.
I doubt this is just something specific to goratings. Dr Bea Teal might have access to these preliminary results at least in Korea, but despite this, one of the main reasons why only the top 100 players are listed, is probably to do with them having the most reliable ratings. Compare them to the top 100 on goratings.org's list, like for like, as we don't know who the 300th rated person is on Dr Teal's list: it might be more surprising.
Despite this, goratings (and mamumamu0413, possibly) ranked Ke Jie as number one before Dr Teal's list. It's an impressive database and rating algorithm, not to be classed as ineffective, I'm sure... ...