This page explains how Kenneth K. Quarshie (USATT# 69866)'s rating went from 1588 to 1566 at the 2010 DSP/NYTTF Open Series held on - 27 Jun 2010. 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.