This page explains how Ralph L. Stadelman (USATT# 10217)'s rating went from 1957 to 1939 at the 1997 Michigan State Championsh held on - 6 Apr 1997. 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.