This page explains how Zhaoqun Zhou (USATT# 4287)'s rating went from 1969 to 1969 at the Topspin Open League event from 27 Jul 2018. 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.