The aim is to be first to get rid of all of one's cards.
A card can only be played if it corresponds to the suit or value. For example, if it is the 10 of spades, only another spade or another 10 can be played (but see below for Queens).
If a player is not able to do this, they draw one card from the stack; If they can play this card, they may do so; otherwise, they keep the drawn card and their turn ends.
If a 7 is played, the next player has to draw two cards. But if the player facing the 7 plays another 7, next player must take 4 cards from the pack, unless they too play a 7, in which case next player must take 6 cards from the pack, unless they too play a 7, in which case next player must take 8 cards from the pack.)
A Queen of any suit can be played on any card. The player who plays it then chooses a card suit. The next player then plays as if the Queen was of the chosen suit.
If an Ace is played, one other card must be played with it. If the player does not have another card of same suit or value, then the player must take a card from the pack. If a player's final card is an Ace, they win on that turn. Next player facing the Ace must play another Ace or they stand for one turn.
In Beginner mode you can see the cards of your opponent, the stack and the deck.