This page explains how James Roy Schnorf (USATT# 9805)'s rating went from 2006 to 2023 at the St. Louis Spring Open held on - 26 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.