This page explains how Lavone Horne (USATT# 22145)'s rating went from 1488 to 1455 at the Heart of Florida Open 2004 held on - 18 Sep 2004. 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.