This page explains how Paul C.T. Liu (USATT# 1628)'s rating went from 1393 to 1288 at the "Dave Zapatka" Springfield Ope held on - 6 Nov 2004. 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.