This page explains how Dmitriy Zhitomirskiy (USATT# 90656)'s rating went from 1239 to 1228 at the LYTTC Friday Pro League event from 24 Nov 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.