This page explains how Preston Ha Trun Ha Nguyen (USATT# 29200)'s rating went from 1789 to 1784 at the San Diego Giant RR & Teams Tou held on - 12 Oct 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.