This page explains how Michael Shieh (USATT# 17295)'s rating went from 1943 to 1944 at the TT&M Friday Night Butterfly League event from 25 Nov 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.