This page explains how Robert Enders (USATT# 42110)'s rating went from 1309 to 1275 at the Arizona Open Winter Warm-up held on - 8 Dec 1996. 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.