This page explains how Tom Tsao (USATT# 84891)'s rating went from 1952 to 1948 at the The Top Spin Saturday League event from 19 Jan 2013. 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.