This page explains how Carlos J. Ortegon (USATT# 1908)'s rating went from 1391 to 1377 at the Golden State Open held on - 24 May 1998. 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.