This page explains how Jing Yuan (USATT# 927761)'s rating went from 1089 to 1061 at the PTTC Saturday League event from 14 Dec 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.