This page explains how Davis Kam (USATT# 24846)'s rating went from 1929 to 1921 at the NJTTC Thursday Adv League event from 12 Nov 2015. 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.