This page explains how Xiaocong(Peter) Guo (USATT# 16855)'s rating went from 1795 to 1812 at the 2009 Rose City Open held on - 28 Jun 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.