This page explains how Crystal Wang (USATT# 77897)'s rating went from 602 to 600 at the Potomac 2008 Fall Open held on - 9 Nov 2008. 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.