This page explains how Davis Kam (USATT# 24846)'s rating went from 1957 to 1921 at the NJTTC Monday League event from 22 Oct 2008. 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.