This page explains how Jim E. Dalland (USATT# 5187)'s rating went from 1380 to 1330 at the Schaumburg Summer Open held on - 15 Jun 2002. 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.