This page explains how Robert Ertel (USATT# 5647)'s rating went from 1505 to 1455 at the Princeton Open TT Tournament held on - 31 Oct 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.