22 Jul 2022
This page explains how Xuedong Chai (USATT# 267640)'s rating went from 401 to 400 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 22 Jul 2022. 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.