This page explains how Alan Bruce Williams (USATT# 11122)'s rating went from 872 to 828 at the Matthew Murand Memorial Open o held on - 20 Aug 2000. 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.