This page explains how Kyongsook Kim (USATT# 83553)'s rating went from 1440 to 1390 at the HCTT Tuesday Night League event from 6 Feb 2018. 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.