This page explains how Brian Hutchins-Knowle (USATT# 62550)'s rating went from 1872 to 1871 at the 2018 Swan Warriors July Open held on 21 Jul 2018 - 22 Jul 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.