This page explains how Doug Wruck (USATT# 10604)'s rating went from 1669 to 1667 at the 2009 Wisconsin Closed State Ch held on - 18 Apr 2009. 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.