This page explains how Mark J. Hoffman (USATT# 24438)'s rating went from 1282 to 1278 at the Schaumburg August Open held on - 27 Aug 2005. 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.