This page explains how Tarun Tandon (USATT# 74872)'s rating went from 1953 to 1939 at the ICC - Advanced League event from 29 Jan 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.