This page explains how Ralph L. Stadelman (USATT# 10217)'s rating went from 1835 to 1838 at the Huntsman World Senior Games held on - 8 Oct 2009. 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.