This page explains how Paul A. Frisoli (USATT# 1881)'s rating went from 1570 to 1545 at the MIT Spring 2013 Open held on - 30 Mar 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.