This page explains how Douglas R. Logan (USATT# 7851)'s rating went from 1181 to 1181 at the South Shore Sports/Butterfly Open held on - 26 Oct 2014. 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.