This page explains how Yukong Zhang (USATT# 71722)'s rating went from 1659 to 1602 at the TX Wesleyan Open held on - 6 Oct 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.