This page explains how Stefano Ratti (USATT# 25847)'s rating went from 2213 to 2178 at the 2014 Butterfly MDTTC October Open held on - 19 Oct 2014. 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.