This page explains how Patrick Keville (USATT# 77971)'s rating went from 1904 to 1893 at the NJTTC Friday League event from 12 Oct 2018. 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.