This page explains how Gordon MacDowell (USATT# 65540)'s rating went from 1563 to 1523 at the Grand Canyon State Games held on - 17 Jun 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.