This page explains how Lixin Lang (USATT# 52443)'s rating went from 2071 to 2113 at the Potomac 2009 Spring Open held on - 10 May 2009. 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.