This page explains how Shirley Zhang (USATT# 85208)'s rating went from 1776 to 1757 at the 2015 NNTTC Joola Open held on - 27 Jun 2015. 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.