This page explains how Douglas Tien (USATT# 55269)'s rating went from 1880 to 1880 at the Bay Area Table Tennis Federation event from 27 Sep 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.