This page explains how Jeff Bramwell (USATT# 279838)'s rating went from 1226 to 1221 at the TT&M Friday Night Butterfly League event from 12 Jan 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.