This page explains how J. Brian Chappell (USATT# 16008)'s rating went from 1210 to 1176 at the Davison November Open held on - 14 Nov 1998. 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.