This page explains how Jimmy Dorrell (USATT# 60099)'s rating went from 1677 to 1660 at the Waco 2006 Summer RR held on - 29 Jul 2006. 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.