This page explains how William Horton (USATT# 91917)'s rating went from 1865 to 1892 at the 2014 Butterfly Atlanta Fall Open held on - 27 Sep 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.