This page explains how Gia Leu (USATT# 17561)'s rating went from 1636 to 1659 at the Arizona Open held on - 21 Mar 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.