This page explains how DAVID LANDRY (USATT# 19736)'s rating went from 2028 to 2021 at the Alabama State Championships Cl held on - 25 Mar 2006. 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.