This page explains how Mark Johnson (USATT# 26863)'s rating went from 1232 to 1214 at the Fremont Table Tennis Academy League event from 16 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.