This page explains how Bill Maguire (USATT# 19763)'s rating went from 1585 to 1579 at the BTTC League event from 8 Aug 2017. 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.