This page explains how Paul M. Hadley (USATT# 23497)'s rating went from 1581 to 1560 at the NJTTC Monday League event from 17 Sep 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.