This page explains how James Goodwin (USATT# 39061)'s rating went from 2172 to 2147 at the WCTTA Saturday League event from 5 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.