This page explains how Ziwei Shen (USATT# 1166078)'s rating went from 199 to 198 at the Topspin Open League event from 2 Jan 2020. 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.