This page explains how Michael Raybman (USATT# 215854)'s rating went from 1290 to 1339 at the Boston TTC Div.B event from 14 May 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.