This page explains how Carlos J. Ortegon (USATT# 1908)'s rating went from 1439 to 1372 at the California Open on the 2004 St held on - 29 Feb 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.