This page explains how Tarun Tandon (USATT# 74872)'s rating went from 1857 to 1855 at the ICC - Advanced League event from 13 May 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.