This page explains how Mathew Averbukh (USATT# 72443)'s rating went from 1540 to 1521 at the RoboFit Fall League event from 11 Sep 2010. 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.