The reigning  world chess champion and the highest-rated player in the history of the game with an ELO rating of 2872, Magnus Carlsen, was...

Reigning world chess champion Magnus Carlsen has launched Play Magnus, the "official Magnus Carlsen app." PlayMagnus is a free iOS app, that includes a chess engine tuned to play like Carlsen at different ages. Users can also work with training material, and earn points towards qualifying to play the Norwegian grandmaster live.