This page explains how Lennox Douglas (USATT# 3212)'s rating went from 1998 to 1990 at the West Jersey Table Tennis Club League event from 19 Mar 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.