This page explains how Richard P Weiss (USATT# 49153)'s rating went from 1009 to 1001 at the West Jersey Table Tennis Club League event from 15 Aug 2019. 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.