In the simplified versions, the cards have only one color (the easiest) or two colors (medium difficulty). Unlike other popular patience games, Spider Solitaire is played with two decks of cards (that is with 104 cards). Most likely, Spider Solitaire derives its name from the eight legs of a spider, which correspond to the eight foundations which must be filled with cards in order to solve the game. The origins of the game name are not certain.
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