This page explains how Richard A. Dewitt (USATT# 47261)'s rating went from 2164 to 2171 at the MDTTC Saturday League event from 19 Jul 2015. 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.