This page explains how Jeremiah Jeffrey (USATT# 216939)'s rating went from 1292 to 1291 at the MDTTC Tuesday/Friday League event from 30 Mar 2018. 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.