This page explains how Kyongsook Kim (USATT# 83553)'s rating went from 1428 to 1401 at the Potomac 2016 Fall Open held on 12 Nov 2016 - 13 Nov 2016. 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.