This page explains how William Chan (USATT# 77422)'s rating went from 1271 to 1288 at the QTTC March Open held on - 28 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.