This page explains how Hong-Zhong Zhang (USATT# 10140)'s rating went from 1876 to 1869 at the Sacramento Summer Open held on - 18 Aug 2012. 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.