This page explains how David I. I. Rubin (USATT# 9611)'s rating went from 1991 to 1975 at the 2013 Best of the West Open held on - 29 Sep 2013. 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.