This page explains how Patrick Keville (USATT# 77971)'s rating went from 1983 to 1978 at the NJTTC Thursday Adv League event from 29 Aug 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.