This page explains how James S S Goodwin IV (USATT# 93421)'s rating went from 1224 to 1221 at the SVTTC Sunday U2000 event from 9 Aug 2015. 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.