This page explains how Mathew Averbukh (USATT# 72443)'s rating went from 1558 to 1554 at the LATTF event from 13 Feb 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.