This page explains how Nhat Nam Trinh (USATT# 72249)'s rating went from 1813 to 1809 at the Framingham TTC May Open held on - 20 May 2007. 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.