This page explains how Chris Karrasch (USATT# 23151)'s rating went from 1257 to 1229 at the Keystone State Games held on - 30 Jul 2006. 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.