This page explains how Guo Hui Lu (USATT# 23538)'s rating went from 2288 to 2269 at the LATTF event from 5 May 2013. 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.