This page explains how Richard A. Dewitt (USATT# 47261)'s rating went from 2220 to 2219 at the 2011 DSP Cup/NYTTF Open Series held on - 16 Oct 2011. 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.