This page explains how Kevin Duong Au (USATT# 59475)'s rating went from 2219 to 2221 at the Bay Area Table Tennis Federation event from 17 May 2008. 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.