This page explains how John Oros (USATT# 53699)'s rating went from 1858 to 1856 at the South Bend Senoda Open held on - 26 Sep 1998. 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.