This page explains how Rahul Chatwani (USATT# 81586)'s rating went from 261 to 270 at the Beginner League event from 6 Oct 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.