This page explains how Xuedong Chai (USATT# 267640)'s rating went from 383 to 378 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 24 Feb 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.