This page explains how Zichun Shen (USATT# 272586)'s rating went from 838 to 771 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 12 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.