This page explains how Jack Gelman (USATT# 46810)'s rating went from 2173 to 2145 at the 2004 Brooklyn October Open held on - 17 Oct 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.