This page explains how Rachel Jiayu Sung (USATT# 82232)'s rating went from 609 to 579 at the Beginner League event from 11 Jan 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.