This page explains how Brian Louie (USATT# 28173)'s rating went from 1575 to 1545 at the 2005 Concord Cup Youth Open held on - 2 Oct 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.