This page explains how Jiaqi Zheng (USATT# 72386)'s rating went from 2580 to 2588 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.