This page explains how David Varkey (USATT# 79501)'s rating went from 1269 to 1305 at the Club JOOLA December Open held on - 13 Dec 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.