This page explains how Robert Trudell (USATT# 60358)'s rating went from 1443 to 1285 at the 2017 Arizona Open & Giant RR held on 18 Feb 2017 - 19 Feb 2017. 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.