This page explains how William Waltrip (USATT# 72008)'s rating went from 1557 to 1556 at the Texas Wesleyan Open held on - 3 Mar 2007. 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.