Calculation is a solitaire where every move must be carefully calculated. It offers more opportunities for a skillful player than any other solitaire. Ace, 2, 3 and 4 of any suit are laid out in a row, forming four bases. The goal of the game is to move the remaining 48 cards to the four piles of the same suit. The first pile should be in sequence from the Ace to the King. Other piles are similar, but start with 2(2, 4, 6, 8 ...), 3 (3, 6, 9, Q ...) and 4 (4, 8, Q, 3 ...) until they reach the King.