This page explains how Hongxuan Zhu (USATT# 218441)'s rating went from 1429 to 1421 at the Princeton Pong Leagues event from 18 Jul 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.