This page explains how Hoan Nguyen (USATT# 6411)'s rating went from 2223 to 2230 at the HTTC Open held on - 5 Jun 1999. 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.