Play Magnus is a commercial computer chess mobile app available for the iOS and Android mobile operating systems. The software is named after former World Chess Champion Magnus Carlsen and features adjustable difficulty levels for chess players of various skills. It has been available since 2014 and is developed by the Norwegian company Play Magnus AS, which was co-founded by Carlsen. The program is a chess engine tuned to play at 30 different skill levels based on Magnus Carlsen's ability at given ages. Users earn points by playing chess, or can purchase points for money. Points can be spent on querying the engine for move suggestions, and on the undo function (the cost of this is higher at the higher levels). With a large points balance, it used to be possible to win a chance of playing Magnus in person but this is no longer mentioned by the app. More information...
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