This page explains how Kenneth K. Yoon (USATT# 49699)'s rating went from 1498 to 1490 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.