This page explains how Dennis S. S. Cobb Sr (USATT# 30032)'s rating went from 2141 to 2131 at the January Open held on - 31 Jan 2004. 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.