This page explains how Patrick Keville (USATT# 77971)'s rating went from 1844 to 1827 at the NJTTC Thursday Adv League event from 27 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.