This page explains how Lichi Liu (USATT# 270238)'s rating went from 720 to 654 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 5 Jan 2021. 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.