This page explains how Stefano Ratti (USATT# 25847)'s rating went from 2290 to 2289 at the MDTTC Saturday League event from 5 Jun 2016. 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.