People have been interested in chess-playing computers before there ... The code is in JavaScript, but the approach struck us as old school. However, it is interesting to watch the evolution ...

Duolingo also said each section represents a range on the Elo rating system, the method by which a chess player's skills are ...

Duolingo launched a beta version of a new chess course on Tuesday, April 22. Here's what the new, free course will offer.