This page explains how Karthikeyan Thukkaram (USATT# 94138)'s rating went from 661 to 650 at the Fall Open held on - 14 Nov 2015. 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.