This page explains how Igor Shulkin (USATT# 18534)'s rating went from 2219 to 2213 at the LYTTC Friday Pro League event from 25 May 2013. 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.