This page explains how Paul Chang (USATT# 25587)'s rating went from 1643 to 1649 at the Cinco de Mayo RR held on - 4 May 2002. 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.