This page explains how Alan B. Pruce (USATT# 19698)'s rating went from 1635 to 1633 at the MDTTC Saturday League event from 5 Nov 2009. 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.