This page explains how Alan Hau (USATT# 12870)'s rating went from 1558 to 1548 at the Golden State Open - CA held on - 27 May 2001. 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.