I took the Rybka v2.2 that i had on my computer and matched it with the 'little chess partner' found on this site  (i have yet to see rybka lose to LCP, but thier rating differences are pretty dramatic).

I am not sure about the two computer's ratings.  It is guessed on this site that LCP is 2000 and Rybka v2.2 is a little above 3000.  LCP pulled some good moves but Rybka dominated the tactical play.

http://www.grappa.univ-lille3.fr/icga/tournament.php?id=178

holy that was not close

http://www.chess.com/forum/view/general/me-vs-little-chess-partner-on-hard

Check this out I played against little chess partner.