This page explains how Davis Kam (USATT# 24846)'s rating went from 1917 to 1890 at the NJTTC 2011 December Open held on - 4 Dec 2011. 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.