This page explains how David Phoong (USATT# 25347)'s rating went from 1858 to 1844 at the 2006 San Diego Open held on - 7 May 2006. 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.