This page explains how Sunil Bandapally (USATT# 83332)'s rating went from 1391 to 1390 at the AZ PTTC Monday event from 12 Sep 2011. 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.