This page explains how Greg Campbell (USATT# 215215)'s rating went from 871 to 909 at the TT&M Friday Night Butterfly League event from 7 Jun 2024. 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.