Duolingo launched a beta version of a chess course on Tuesday, April 22. The new, free course teaches users how each chess piece moves through short puzzles, lead by the app's in-game chess coach ...

Magnus Carlsen, the chess grandmaster who has become the public face of the game, was forced into a draw after an intense game played over 6 1/2 weeks — and it only took some 143,000 opponents working ...