This page explains how Christopher P. Kalagher (USATT# 7125)'s rating went from 1843 to 1827 at the New Hampshire RR Open held on - 9 Feb 2003. 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.