This page explains how Patrick Sunman Wu (USATT# 60420)'s rating went from 1897 to 1980 at the ICC Cupertino League event from 15 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.