This page explains how Martin P. P. Del Vecchio (USATT# 18168)'s rating went from 1961 to 1963 at the Pensacola's 13th Annual Winter Open held on - 19 Jan 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.