This page explains how Rainer Eysser (USATT# 5679)'s rating went from 1582 to 1561 at the Utah Valley Open held on - 18 Apr 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.