This page explains how Kai Liu (USATT# 83786)'s rating went from 1940 to 1929 at the Topspin Open League event from 27 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.