This page explains how William Stewart (USATT# 75322)'s rating went from 880 to 887 at the The 2009 Cleveland Winter Open held on - 1 Feb 2009. 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.