The object of Sum21 is to place cards in columns which add up to 21, without going over. The sum of the columns is then taken and the remaining time is multiplied by how close to 21 the columns are.
For example, the most you can get is 105, this will multiply the remaining time by 1,000. However, the lowest column total to get any score is 97 which multiplies the remaining time by 50. As with most card games, the Ace can be played as 1 or 11. When the column total shows Soft next to the total, it shows that the ace is being used as a 11. When placing a card on the column which takes the total over 21, it will go to being played as a 1. All face cards are worth 10 points each.
