This page explains how Radha Krushna M Kanchanapelly (USATT# 83335)'s rating went from 1239 to 1230 at the AZ PTTC Monday event from 8 Nov 2010. 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.