This page explains how Patrick Keville (USATT# 77971)'s rating went from 1848 to 1821 at the NJTTC Thursday Adv League event from 22 Jun 2023. 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.