This page explains how Igor Tsalyuk (USATT# 74676)'s rating went from 1241 to 1237 at the Aurora TTC League event from 22 Feb 2007. 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.