This page explains how Arthur B. Chase (USATT# 4790)'s rating went from 1626 to 1619 at the Waco Summer RR held on - 29 Jul 1995. 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.