This page explains how Guo Hui Lu (USATT# 23538)'s rating went from 2253 to 2237 at the LATTF event from 18 Oct 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.