This page explains how Ethan Xiao (USATT# 275494)'s rating went from 172 to 165 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 7 Jan 2023. 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.