Everyone plays at once. Build the shared piles in the middle up from the aces, by suit, from your 13, your discard pile and your four piles. Empty your 13 first and the hand is over.
How to play
Everyone plays at once, so there’s no waiting for a turn. Here’s all you need:
The aim: get rid of the 13 cards in your 13 pile before anyone else. Everyone plays at once.
The middle: any ace starts a new pile there. Then the next card up, same suit. Anyone can play on any pile.
Your four piles: the next card down, red on black or black on red. An empty pile takes any card. You can move a card with the ones on top of it.
Stock: tap it to turn three cards onto your discard pile. Only the top card of the discard pile can be played, then the one under it. Space turns the stock on a keyboard.
Moving a card: tap it, then tap one of the glowing places it can go. Or drag it there.
Faster: double-tap a card (double-click on a computer) to send it to its best place: the middle if it can go there, otherwise one of your piles.
Double-tap the top card of one of your piles to bring over a card that fits on it: from your 13 first, then your discard pile, then your other piles. Double-tap an empty space to put your 13’s top card in it.
Two hands, one pile: if someone gets there first, your card goes back.
Scoring: +1 for every card you put in the middle, −2 for every card left in your 13. First to 100 wins.
A helper (on the start screen) can play your 13 for you, or turn your stock and play your discard pile. You can still play those yourself too.
You can read this again any time with the ? button at the top.