This page explains how Thong Nguyen (USATT# 75212)'s rating went from 1981 to 1983 at the LATTF event from 10 Oct 2010. 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.