This page explains how Lixin Lang (USATT# 52443)'s rating went from 2129 to 2099 at the Potomac 2007 Fall Open held on - 11 Nov 2007. 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.