This page explains how Michael Raybman (USATT# 215854)'s rating went from 1279 to 1291 at the Boston TTC Div.B event from 27 Nov 2017. 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.