Build your own board
Pick the mix yourself and send the link to whoever you want to race. Handy for a stream: the board is a URL, and anyone signed in who opens it can enter.
Settings
Does not count towards the weekly ladderSign in to build a board and share it.
Every player on a board needs a verified TMX account on the exchange a tile belongs to — that is how a replay is matched to a person. Link them on your account page. Note that only TMNF and TMUF can hand a map straight to the game, so tiles from Nations, Sunrise and Original are opened on TMX by hand.