This page explains how Bob O. Bowlander (USATT# 4373)'s rating went from 1775 to 1772 at the 2006 Spin Classic Open held on - 14 Oct 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.