This page explains how Mark J. Hoffman (USATT# 24438)'s rating went from 1257 to 1247 at the Chinese New Year Open held on - 11 Feb 2006. 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.