This page explains how Roberto A. Byles (USATT# 4615)'s rating went from 2009 to 1968 at the HITTA Weekly League event from 28 Apr 2021. 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.