This page explains how Randall Medcalf (USATT# 64482)'s rating went from 1939 to 2018 at the Houston Elite League event from 25 Jan 2019. 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.