Spider - Solitaire at Mac App Store analyse

This card game is a Spider Solitaire. It is a popular patience game that is played with two decks of cards. The main purpose is to remove all cards from the table. See the rules for more details: You can move a card to an empty column, or on a greater card (whatever the color). But you can only move a set of cards provided the cards have the same color and the correct order. A complete suit of cards gets automatically removed. At any time, player can use the remaining stack to add cards on all columns.