This page explains how Claude D. Jones (USATT# 7065)'s rating went from 1950 to 1920 at the 2015 Austin Fall Classic Round Robin Tournament held on - 17 Oct 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.