This page explains how Mark Ben Weber (USATT# 10964)'s rating went from 1828 to 1790 at the Dayton Butterfly Open held on - 14 Apr 2007. 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.