This page explains how Heekyong Ahn (USATT# 274878)'s rating went from 833 to 817 at the 2022 JOOLA North American Teams held on 25 Nov 2022 - 27 Nov 2022. 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.