This page explains how Dat Nguyen (USATT# 76313)'s rating went from 1556 to 1593 at the St. Patrick's Day Open held on - 16 Mar 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.