This page explains how Grayden Cook (USATT# 85861)'s rating went from 1590 to 1621 at the 2012 Austin Winter Classic Round Robin held on - 26 Feb 2012. 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.