This page explains how Christoph Teille (USATT# 33443)'s rating went from 2234 to 2213 at the MDTTC Butterfly September Open held on - 7 Sep 2008. 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.