This page explains how Eddy Shum (USATT# 271272)'s rating went from 400 to 398 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 8 Apr 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.