This page explains how Raymond B. Landis (USATT# 24743)'s rating went from 1316 to 1289 at the Glendale Friendship Games held on - 24 Oct 2010. 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.