This page explains how Eric J. Ziegler (USATT# 88227)'s rating went from 1645 to 1598 at the Tucson Table Tennis Club League event from 1 Mar 2020. 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.