This page explains how Lixin Lang (USATT# 52443)'s rating went from 2153 to 2089 at the 2011 Butterfly MDTTC September Open held on - 11 Sep 2011. 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.