This page explains how David Jarrin (USATT# 27909)'s rating went from 1731 to 1690 at the 2005 N. American Teams Open Ch held on - 27 Nov 2005. 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.