This page explains how Guo Hui Lu (USATT# 23538)'s rating went from 2429 to 2380 at the LATTF event from 26 Mar 2010. 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.