This page explains how Xiaofeng Guo (USATT# 34134)'s rating went from 1717 to 1674 at the 2008 Spintech Summer Classic held on - 7 Jun 2008. 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.