An option for Doubles rules would be awesome. Only differences. Two rocks are pre-positioned. Team with hammer gets a rock in the back 4ft. Team without gets perfect centre guard (say half way between top house and hog line). Five thrown rocks per team (fast!). Max 8 ends. Free guard zone is for the first three thrown rocks and applies everywhere, even the house (so essentially a 5 rock rule). Team that loses an end can choose to have hammer or not. There is a power play option and that's where it gets a little more complicated but I don't think you'd need it for online play. Nor do you really need the choosing of the hammer. It's more about the FGZ and pre-positioned rocks that makes it more of draw game and would probably be good for online play, especially because of the pace of the game too. It will be in the Olympics in 2018, btw.