This page explains how Keith Evans (USATT# 19043)'s rating went from 2418 to 2409 at the 11th Annual Decatur Open held on - 17 Aug 2002. 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.