This page explains how Paul Villacarlos (USATT# 5399)'s rating went from 1544 to 1509 at the California Open held on - 1 Sep 2002. 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.