This page explains how Diane Jiang (USATT# 74742)'s rating went from 412 to 389 at the ICC Juniors and Adults League event from 28 Sep 2007. 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.