However, one card can be moved at a time, and building is not round-the-corner, i.e. aces cannot be placed over kings and vice versa.
But like Beleaguered Castle and its cousin Streets and Alleys, winning is slim because of the distribution of high cards in the tableau.
Game-play is described in the book Lady Cadogan's Illustrated Games of Solitaire of Patience as follows:[3] Deal out the entire pack horizontally in two groups, as in tableau, beginning at the left hand, and dealing straight across each group, leaving space in the centre for four aces.
Should any aces appear on the outside of either group, play them, as also any other suitable cards for continuing the foundations (Rules I and II).
You next proceed to form marriages, both in ascending and in descending lines, with cards on the outside of both groups (Rule I).
It is played like Fortress except that in this game, the player can freely choose the starting rank of all the foundations.