This page explains how Grayden Cook (USATT# 85861)'s rating went from 2018 to 2017 at the 2013 Austin Spring Classic Round Robin held on - 14 Apr 2013. 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.