This page explains how Ron E. Schull (USATT# 9818)'s rating went from 1673 to 1657 at the Columbus RR Open held on - 8 Feb 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.