This page explains how Alex Varady (USATT# 13192)'s rating went from 1665 to 1624 at the ICC Juniors and Adults League event from 18 Dec 2008. 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.