For those who don’t know what a hangout is, it’s a video chat that can include up to 15 people; it’s like Skype, but inside your web browser (and also from mobile devices!). This is one of the most amazing Google+ features.
While you are in a hangout you can use shared apps (like a notepad, games, etc.) and now you can also play chess! Start a chess hangout by pressing the “Hangout” button in http://chess.mobialia.com or directly with the button in this post. All the participants can move all the pieces, so it can be used to play chess games or to teach chess lessons.