This page explains how David A. Jones (USATT# 42342)'s rating went from 1616 to 1621 at the December Westfield Open held on - 14 Dec 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.