This page explains how ILIYAN ARABOV (USATT# 82489)'s rating went from 1173 to 1174 at the Bumpernets Winter '09 T.T. Doubles League event from 12 Feb 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.