This page explains how Ky H. H. Nguyen (USATT# 57018)'s rating went from 1824 to 1821 at the Pacific Coast Open held on - 10 Sep 2000. 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.