This page explains how John Jarema (USATT# 6975)'s rating went from 1889 to 1866 at the NJTTC Thursday Adv League event from 20 Jun 2019. 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.