This page explains how Malcolm Darukhanawalla (USATT# 73345)'s rating went from 1648 to 1642 at the Intermediate League event from 13 Dec 2012. 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.