This page explains how Guo Hui Lu (USATT# 23538)'s rating went from 2242 to 2249 at the LATTF event from 17 Jun 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.