This page explains how Dennis S. S. Cobb Sr (USATT# 30032)'s rating went from 2111 to 2090 at the Davison September Open held on - 30 Sep 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.