This page explains how Amer M. Shaw (USATT# 5954)'s rating went from 1891 to 1972 at the 14th Annual Decatur Open held on - 20 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.