This page explains how Houshang Bozorgzadeh (USATT# 4400)'s rating went from 1720 to 1690 at the South Shore Sports/Butterfly TT Championships held on - 28 Oct 2012. 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.