This page explains how Tung D. D. Phan (USATT# 9070)'s rating went from 2338 to 2315 at the 2012 U.S. Nationals held on - 22 Dec 2012. 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.