This page explains how David Rosenzweig (USATT# 55035)'s rating went from 2251 to 2250 at the NJTTC Friday League event from 26 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.