This page explains how Rahul Chatwani (USATT# 81586)'s rating went from 180 to 261 at the Beginner League event from 29 Sep 2009. 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.