This page explains how Tony Nguyen (USATT# 77371)'s rating went from 1841 to 1804 at the AZ PTTC Monday event from 10 Jun 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.