Cruel Solitiare is a classic solitaire card game where you have four suit piles located on the right side of the game screen that you need to build up from Ace to King by suit. You have 12 piles of four cards each, and the suit piles all start out with an ace in them. The 12 piles are built down by suit. When you move cards around in the piles, they can be Shifted back into piles of 4 by clicking the 'Shift' button at the bottom of the game screen. This doesn't shuffle the cards, it just moves the to the left, so that you once again have 4 cards in each pile. This button only does something if the cards are not all piles of 4. You can use it as many times as you want in a game.