This page explains how Xiaofeng (frank Zhu (USATT# 27551)'s rating went from 1631 to 1564 at the Cary Open Giant RR Jamboree #1 held on - 19 Nov 2005. 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.