This page explains how Preston Ha Trun Ha Nguyen (USATT# 29200)'s rating went from 1811 to 1971 at the Long Beach Table Tennis League event from 21 Feb 2004. 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.