The object of the game is to sort the cards into sets of four cards of the same value.
Cards may be moved between piles if they are of the same value as the card they are being placed on top of, and the pile does not already contain four cards. No pile can have more than four cards.
Any card can be moved to an empty pile.
The game is successfully completed when thirteen of the piles contain complete sets of cards of the same value, and the other two piles are empty.