This page explains how J. Brian Chappell (USATT# 16008)'s rating went from 1208 to 1136 at the Davison August Open held on - 28 Aug 1999. 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.