This page explains how Ben E. Ritter (USATT# 8981)'s rating went from 1208 to 1218 at the Schaumburg Open held on - 31 May 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.