This page explains how Kelvin Koh (USATT# 90486)'s rating went from 2105 to 2089 at the NJTTC Thursday Adv League event from 24 Oct 2019. 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.