Welcome on the Virtual-ratingpage.
What have I done? With the '(internet)programmlanguage' PHP and the database (MySql) I can make from the results of players in Toernooibase (with a rating) server-side ratinglists. Every time when there are inserted new results, you can see the changes in the lists.
These changes are visible the day after the games are played. At night the new ratings will be calculated. A lot faster then the offical KNDB lists (once in a quarter year).
How is the KNDB-rating calculated? In an article in "Het Damspel" of august 1997 Jan Masselink, the ratingmanager of the KNDB explained this. Sadley I have this only in Dutch: (You can reed it here) . This article you also find at the programm Toernooimanager.
Jan Masselink explains terms as tournamentprestationranking, correctionfactors and turbofactor.
Addional KNDB has published a file Calculationrules (pdf 33 kB) (sorry also only in Dutch). Another explanation of the calculations. Plus the official FMJD-(ELO) table. From 1-7-2006 Toernooibase is also working with this offical table.
Watch it! Sometimes, the results in the database don't count on the official KNDB-rating. For example, the PFDB seniors 2007 tournament is not incorporated in the official KNDB-ratinglist.
On the TPR-list in Toernooibase, players will be shown, who have played ten or more games (against opponents with a rating).
I have been aroused curiosity what you think of this whole 'ratingstory'. Let me know by e-mail:
pboumaharl apesturtsje hetnet.nl