This page explains how Shaun A. Abrams (USATT# 24506)'s rating went from 1601 to 1599 at the 2004 Brooklyn November Open held on - 21 Nov 2004. 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.