This page explains how Phong Ho (USATT# 50220)'s rating went from 2015 to 1993 at the 1995 Vietnamese New Year "Tet" held on - 29 Jan 1995. 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.