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Association of Chess Professionals Articles
No change in the K-factor of ELO-rating
Olena Boytsun [Wed Jul 01st, 14:28]The FIDE Presidential Board (June 15-18, 2009) in Krakow, Poland, froze the previous decision of the General Assembly to increase the K-factor value for rating calculations. It was decided that the changes are to be investigated in detail, and so the propositions were sent back to the Qualification Commission for further investigation.
Read more K-factor discussion Part 2
Dmitry Jakovenko [Fri Jun 05th, 23:56]
The latest decision of FIDE to postpone the increase of the K-factor finally caused disputes on whether such increase was needed at all. The nature of these disputes till now has given little contribution to the creation of verity. The rating system is a mathematical model and it should not be discussed only on qualitative level. Being at the same time a grand master and a graduating student of the mathematical statistics department, I hope to submit a qualified opinion on this problem and turn the course of further disputes to a more constructive direction.
Translated from Russian by Alyona Bulgakova
ACP Board Newsletter #2/2009
boytsun [Sat May 30th, 21:26]The ACP Board Newsletter #2/2009 is available to download at http://chess-players.org/img/news/ACP-newsletter-02-2009-eng.pdf
The date of issue is the 17th of March 2009. All members of the ACP received the newsletter directly to their email. In case you are a member of the ACP and didn’t receive your copy, please, contact Olena Boytsun at strategical.development@gmail.com
The newsletter is published at the ACP website with the delay.
K-factor discussion Part 1
Dmitry Jakovenko [Thu May 28th, 10:59] The latest decision of FIDE to postpone the increase of the K-factor finally caused disputes on whether such increase was needed at all. The nature of these disputes till now has given little contribution to the creation of verity. The rating system is a mathematical model and it should not be discussed only on qualitative level. Being at the same time a grand master and a graduating student of the mathematical statistics department, I hope to submit a qualified opinion on this problem and turn the course of further disputes to a more constructive direction.
Translated from Russian by Alyona Bulgakova
Open letter to FIDE President Kirsan Iljumzhinov
ACP Board [Mon May 25th, 14:32]
Open letter to FIDE President Kirsan Iljumzhinov
On May 19th, the ACP Board sent the following letter to FIDE President Kirsan Iljumzhinov. Read more
WRC
ACP [Mon May 25th, 09:45] Boris Gelfand - new ACP Champion! Congratulations!
Details on the ACP World Rapid Cup official site www.worldcup.pivdenny.com ACP WRC
ACP [Fri May 15th, 10:17] 
ACP World Rapid Cup, Odessa, 22-24 May 2009
The field of 16 players is now announced: Movsesian
Grischuk
Eljanov
Gashimov
Najer
Svidler
Tregubov
Najditsch
Bacrot
Efimenko
Jakovenko
Moiseenko
Gelfand
Karpov
Gurevich
Drozdovsky
Official site www.worldcup.pivdenny.com
K-factor discussion continues
Michal Krasenkow [Thu May 14th, 23:24]
Following the reasonable motion by FIDE to retract its decision to drastically increase the K-factor in rating calculations, made at the Dresden Congress, there have been an extensive discussion about the “optimal” K-factor on the Chessbase website. The whole discussion apparently lacks one important point: what exactly do we want to optimize?
Read more New blog for women's chess!
ACP [Tue May 12th, 17:11] 
We are glad to announce the new blog for women's chess www.chessblog.com. created by Women's World Champion Alexandra Kosteniuk to promote women's chess in the world. We wish success to this venture and through it send our best wishes to all women chess players in the world!
ACP Board
K-factor discussion
ACP [Mon May 11th, 18:26]
The detailed research made by GM Jakovenko can now be found on the Russian page. The translated version is coming soon!
ACP Board
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