This page explains how Mitchell Billek (USATT# 45061)'s rating went from 1643 to 1619 at the NJTTC Thursday Adv League event from 23 Jan 2020. 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.