This page explains how Qi Guo (USATT# 80876)'s rating went from 1833 to 1860 at the Topspin Open League event from 13 Dec 2011. 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.