This page explains how Thy Nham (USATT# 80883)'s rating went from 1553 to 1529 at the ICC - Advanced League event from 23 Nov 2009. 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.