This page explains how Alireza Hejazi (USATT# 63010)'s rating went from 2183 to 2154 at the San Diego Open held on - 10 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.