Each game can have four human players, plus the Mexican Train. I don't allow more than that because all the trains won't fit on a screen.

Yes, you can go out on a double. This is one of the most common and most contested variations. 🙂 As I've seen conflicting versions of the rules, I had to pick one.

No, double zeros are scored as zero.

MexicanTrain.Online is meant to accompany existing chat and video programs. I recommend Zoom, Skype or Facebook video. Start a call in one of those apps, then come over to mexicantrain.online and start a game.

• https://en.wikipedia.org/wiki/Mexican_Train#Variations
• https://www.mastersofgames.com/rules/mexican-train-dominoes-rules.htm
• https://www.mexicantrainfun.com/mexican-train-rules/

I thought it would be more fun if each game had a unique name to refer to. Since I'm trying to put a little joy in the world, why not a positive adjective combined with a cuddly animal?