This page explains how George Siu (USATT# 76618)'s rating went from 1603 to 1599 at the ICC Juniors and Adults League event from 21 Aug 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.