This page explains how Owen Allen (USATT# 201551)'s rating went from 1005 to 1001 at the Tucson Table Tennis Club League event from 11 Feb 2017. 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.