You can challenge other players everywhere, from the entire world.
My names is petreius2 you can challeng me and sand me friendship.
http://www.chess.com is downloadble from smartphone (chess.com app), you can login by facebook account and invite your friend.
You can play tournments from your categorie and you can win many virtual medals or cup. You can play blitz, long, and medium time, and you have different ratings for every specialities.
