This page explains how Han Xiao (USATT# 1819)'s rating went from 2501 to 2497 at the PCTTC Open held on - 16 Nov 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.