This page explains how Eriel Marimon (USATT# 1165005)'s rating went from 1914 to 1921 at the TT&M Friday Night Butterfly League event from 14 May 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.