This page explains how Robert Trudell (USATT# 60358)'s rating went from 1518 to 1443 at the 2013 Arizona Sizzler Open held on - 28 Jul 2013. 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.