This page explains how John Oros (USATT# 53699)'s rating went from 1797 to 1782 at the Schaumburg Open held on - 8 May 1999. 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.