This page explains how Patrick Sunman Wu (USATT# 60420)'s rating went from 2052 to 2049 at the ICC Juniors and Adults League event from 27 Oct 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.