At the start of play, an ace, two, three, and four of any suit are removed from a standard deck of cards and laid out as the foundations.
The ace foundation is to be built up in sequence until the king is reached, regardless of suit.
The other foundations are similarly built up, but by twos, threes, and fours, respectively, until they each reach a king.
It offers more scope for skill than many similar games; a skilled player can win Calculation more than half of the time when "normal play" can allow winning 1 in 5 times.
Results will be saved to a file, but it does not save a record of the guest mode. There is no can affect your record when you use when you can try to ask others, and play in a few people.
I added the ability to start over undo the movement of the card. However, undo involving the movement is penalized.
I added a variant of "Calculation", "Computer" and "Superman" and "Betsy Ross". In Betsy Ross, you can not use UNDO.