This page explains how Lizhao Zhang (USATT# 88828)'s rating went from 1236 to 1139 at the Houston Summer Open held on - 18 Aug 2012. 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.