This page explains how Kelvin Koh (USATT# 90486)'s rating went from 1976 to 2002 at the NJTTC Monday League event from 3 Apr 2017. 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.