This page explains how Hong-Zhong Zhang (USATT# 10140)'s rating went from 1898 to 1949 at the 2002 US National Championships held on - 22 Dec 2002. 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.