This page explains how Grayden Cook (USATT# 85861)'s rating went from 2017 to 2015 at the Houston Spring Open held on - 25 May 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.