This page explains how Xujing Zhang (USATT# 199299)'s rating went from 483 to 481 at the Fremont Table Tennis Academy League event from 21 Apr 2018. 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.