This page explains how Bill Maguire (USATT# 19763)'s rating went from 1558 to 1548 at the BTTC League event from 9 Jan 2018. 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.