This page explains how Walt R. Blehm (USATT# 19421)'s rating went from 1054 to 1049 at the US Nationals held on - 19 Dec 1999. 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.