This page explains how Reza Ahrabli (USATT# 3570)'s rating went from 1597 to 1557 at the AITTA event from 11 Nov 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.