This page explains how Bill Vogel (USATT# 3052)'s rating went from 1679 to 1623 at the January Westfield Open held on - 26 Jan 1997. 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.