This page explains how Calvin Tinhang Chan (USATT# 73906)'s rating went from 1661 to 1635 at the 2009 Manor Church Giant RR U-2 held on - 6 Jun 2009. 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.