This page explains how Scott Kandell (USATT# 81500)'s rating went from 1638 to 1630 at the West Jersey Table Tennis Club League event from 15 Jan 2009. 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.