This page explains how Kathleen Fitzgerald (USATT# 91495)'s rating went from 1140 to 1138 at the Essential Table Tennis OKC event from 16 Dec 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.