This page explains how Jay Turberville (USATT# 27535)'s rating went from 2019 to 1969 at the TT&M Friday Night Butterfly League event from 14 Apr 2017. 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.