This page explains how Li Shen (USATT# 224009)'s rating went from 1233 to 1228 at the Princeton Pong Leagues event from 25 Apr 2017. 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.