This page explains how James S S Goodwin IV (USATT# 93421)'s rating went from 1493 to 1521 at the WCTTA Saturday League event from 4 Feb 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.