This page explains how Brian Walt (USATT# 84362)'s rating went from 1119 to 1118 at the Boston TTC Div.B event from 19 Jun 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.