This page explains how John Andrade (USATT# 3893)'s rating went from 1819 to 1807 at the NJTTC 2013 November Open held on - 3 Nov 2013. 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.