This page explains how Joanna Sung (USATT# 82231)'s rating went from 569 to 511 at the JUIC International Jr. & Cadet Championship held on - 6 Nov 2011. 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.