Fortress (card game) Fortress (card game) Fortress is a solitaire card game which is played with a deck of playing cards, of the Castle family. It has two more tableau piles than Beleaguered Castle and the piles are shorter. First, ten overlapping rows of cards are formed, two containing six cards (one on the left and one at the right) and the rest having five cards (four at each side). A space is left in the middle for the aces, which when available, become the bases for the foundations. The foundations are each built up by suit up to kings. At the tableau
Commerce (card game) face up to the table to form the "widow". Before looking at his own cards, the dealer may exchange one or two of his cards for one or two of the exposed cards on the table, putting his own, face upwards, in their place. His object is to "make his hand", but if he exchanges all three cards at once he cannot do it again. Thereafter, each in turn, starting with the eldest, can do likewise. Usually there are as many rounds in the game as there are players, and a fresh card is added to the "widow" at the