This page explains how Houshang Bozorgzadeh (USATT# 4400)'s rating went from 1968 to 2025 at the Rockford May Open held on - 17 May 1997. 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.