This page explains how Yichi Zhang (USATT# 89328)'s rating went from 2534 to 2521 at the San Antonio 2016 Winter Open held on 6 Feb 2016 - 7 Feb 2016. 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.