This page explains how Diane Jiang (USATT# 74742)'s rating went from 665 to 647 at the ICC Juniors and Adults League event from 6 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.