This page explains how Joe Yuan (USATT# 90498)'s rating went from 650 to 634 at the SVTTC Sunday U2000 event from 4 Sep 2012. 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.