This page explains how Ralph C. Bockoven (USATT# 4312)'s rating went from 2157 to 2159 at the Boston TTC event from 27 Oct 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.