This page explains how Noga Nir-Kistler (USATT# 14276)'s rating went from 1638 to 1629 at the Keystone State Games held on - 27 Jul 2008. 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.