This page explains how Kelvin Koh (USATT# 90486)'s rating went from 2049 to 2088 at the NJTTC Monday League event from 21 May 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.