The goal of Klondike solitaire is to place all the cards in each suit in stacks of ascending rank from aces up through kings. Stacks of cards with alternating colors in descending rank can be built in the bottom half of the screen as an intermediate step. Any movable card may be placed on a card next-higher in rank if it is of opposite color. When there is no face-up card left on a pile, the top face-down card is turned up and becomes available.
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