'Make Chess as Accessible as Possible': Duolingo's Next Move Is Teaching Users How to Play Chess Duolingo is debuting a chess course complete with short puzzles and mini-matches. Previous Article She Started a Sustainable Business After a 'Near-Death Experience.' It Led to 8-Figure Sales and Replaced Over 656 Million Pieces of Plastic. Next Article Why Most New Day Traders Go Broke and How a Trading Simulator Helps