This page explains how Magdi H. Abdelmalak (USATT# 53587)'s rating went from 1843 to 1825 at the Desert Table Tennis Outpost event from 11 Dec 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.