This page explains how Wucheng Tao (USATT# 88721)'s rating went from 2108 to 2089 at the Swan Sunday League event from 17 Nov 2019. 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.