This page explains how Reza Ahrabli (USATT# 3570)'s rating went from 1508 to 1493 at the AITTA event from 9 Dec 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.