This page explains how Marvin Karno (USATT# 22332)'s rating went from 1302 to 1301 at the Ararat Open 2013 held on - 26 May 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.