This page explains how Igor Tsalyuk (USATT# 74676)'s rating went from 1236 to 1229 at the Aurora TTC League event from 8 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.