This page explains how Bo Xu (USATT# 1171729)'s rating went from 1172 to 719 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 28 Sep 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.