This page explains how Kathleen Fitzgerald (USATT# 91495)'s rating went from 1018 to 1017 at the Essential Table Tennis OKC event from 6 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.