This page explains how Simon Shtofmakher (USATT# 9997)'s rating went from 2161 to 2152 at the NJTTC Friday League event from 21 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.