This page explains how Michael S. S. Harris (USATT# 32157)'s rating went from 1847 to 1890 at the 15th Annual Decatur Open held on - 19 Aug 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.