This page explains how Bill Vogel (USATT# 3052)'s rating went from 1997 to 1991 at the NYTTF Summer Open held on - 16 Sep 2007. 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.