This page explains how Yahao Zhang (USATT# 31038)'s rating went from 2450 to 2433 at the 2009 Li-Ning Pacific Rim Open held on - 8 Nov 2009. 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.