This page explains how Brian Hutchins-Knowle (USATT# 62550)'s rating went from 1881 to 1878 at the The Top Spin Saturday League event from 25 Apr 2015. 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.