This page explains how David I. I. Rubin (USATT# 9611)'s rating went from 1805 to 1894 at the USATT National Championships held on - 18 Dec 1995. 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.