This page explains how Carl Novick (USATT# 1171501)'s rating went from 1169 to 1159 at the TT&M Friday Night Butterfly League event from 16 Sep 2022. 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.