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

Chess, as a board game, is one of the most challenging and complex activities you can do in your free time or if you feel like having a duel with one of your colleagues or college mates.

The marathon began on Thursday at the iconic Times Square in New York City, where Onakoya aims to play ... free schools for homeless children across Nigeria—a cause at the heart of his Chess ...