This page explains how Robert B. Cordell (USATT# 5067)'s rating went from 2122 to 2030 at the Portsmouth Open Invitational held on - 23 Apr 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.