This page explains how Kenneth M. Dukes (USATT# 43169)'s rating went from 1689 to 1679 at the CATTC Spring Open held on - 3 May 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.