This page explains how Gideon Teitel (USATT# 75508)'s rating went from 624 to 623 at the Club Joola February Open held on - 24 Feb 2008. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.