This page explains how Malcolm Darukhanawalla (USATT# 73345)'s rating went from 1646 to 1621 at the Intermediate League event from 21 Mar 2013. 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.