The company released the mobile app Play Magnus in 2014, before merging with chess24 in 2019 and being acquired by Chess.com in 2022.

Investing Carlsen's own money and that of US and Norwegian investors,[2] Play Magnus AS then began developing Play Magnus, a mobile computer chess app.

Following the merge, the holding company of the two former chess24 owners (Jan Gustafsson and Enrique Guzman) became the largest shareholders in Play Magnus Group.

[7][8] In October 2020, Play Magnus Group was listed on the Oslo Stock Exchange.

[18][19] According to Dot Esports, the Play Magnus Group was unable to make a "sustainable profit" on anything but Chessable, and the merge left "no other realistic chess competitor" except the free, open-source Lichess.