This page explains how Ralph C. Bockoven (USATT# 4312)'s rating went from 2154 to 2122 at the Boston TTC event from 15 Sep 2015. 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.