This page explains how Changping Duan (USATT# 49379)'s rating went from n/a to 2187 at the MDTTC Elite League event from 18 Oct 2003. 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.