This page explains how Patrick Sunman Wu (USATT# 60420)'s rating went from 1980 to 1970 at the Ping Pong Dojo event from 23 Feb 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.