This page explains how Raymond B. Landis (USATT# 24743)'s rating went from 1286 to 1254 at the Power Pong Open held on - 16 May 2009. 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.