This page explains how Byron L. Davis (USATT# 5242)'s rating went from 1642 to 1618 at the The Pre US Nationals 0 Star Open Giant Round Robin held on - 15 Dec 2014. 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.