This page explains how Yi Ma (USATT# 84273)'s rating went from 1687 to 1681 at the Fremont Table Tennis Academy League event from 30 May 2021. 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.