This page explains how Brian Hutchins-Knowle (USATT# 62550)'s rating went from 1767 to 1756 at the 2012 Berkeley Open on JOOLA North America Tour held on - 23 Sep 2012. 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.