This page explains how DAVID LANDRY (USATT# 19736)'s rating went from 1421 to 1413 at the U.S. Open/ITTF Pro Tour held on - 9 Jul 2000. 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.