Fortress Solitaire is a strategic single-deck game. All 52 cards are dealt face up into ten open columns below four empty foundations. Nothing is hidden, and the tableau builds up or down by suit. Play completely free with No downloads!
Objective: Move all 52 cards to four central foundation piles, building them up by suit from Ace to King.
What makes Fortress unique is the flexible tableau building:
Before making a move, consider:
Empty tableau piles are incredibly valuable:
Since building requires the same suit, try not to let two suits pile up in the same column. A column that alternates suits buries the cards under it, because only a same-suit neighbour can ever come off the top. Keeping each column to one or two suits prevents that tangle and makes the next move obvious.
Identify where each Ace is buried and work backward to free them. Getting all four Aces to foundations early opens up much more mobility.
Fortress is closely related to Beleaguered Castle:
Fortress Solitaire is a variation of the classic Beleaguered Castle, which dates back to the 18th century. The name evokes a military fortress under siege: the tableau is the wall of cards you must break down, and the foundations are the keep you build up. Older books deal the columns as two facing "wings"; this version lays the same ten columns out in a single row, which reads better on a screen and changes nothing about the play. Fortress became popular in the early 20th century as a more challenging alternative to Beleaguered Castle, requiring players to first free the Aces before building foundations.
Beleaguered Castle: Aces start in foundations - slightly easier than Fortress.
Streets and Alleys: Eight columns instead of ten, and the tableau builds down regardless of suit.
Citadel: Cards that fit a foundation are played there during the deal, so you start with a head start.
Fortress Solitaire is hard to win. The complete visibility of all cards makes strategic planning possible, but the same-suit building restriction and directional choices create genuine challenge. Even with perfect play only about one Fortress deal in five can be won (Jan Wolter). Many deals are lost from the start: the same-suit restriction can lock a layout no matter how well you play.
Storm the Fortress - master the castle of cards today!
The tableau builds up OR down by suit, both directions at once. A 7 of hearts accepts the 6 or the 8 of hearts, so aces and kings are never dead ends the way they are in a one-directional game.
No. Only the top card of a column moves, always. Every sequence you want to relocate has to be carried across one card per move.
Any card. With no stock and no free cells, an empty column is the only storage in the game, which is why spending one carelessly usually loses the deal.
No. All 52 cards are face up from the start, so nothing is hidden, but some layouts are lost before you touch them. The game tells you the moment no legal action remains.
No. The ace and the king never connect in the tableau. A sequence stops at both ends.
Both are open, single-deck, no-stock games from the same family. Beleaguered Castle builds down regardless of suit with the aces already up; Fortress builds up or down strictly in suit and makes you dig the aces out.
Not always. An empty column is the only storage in the game, so fill it when the move frees an important card or separates two tangled suits, not just because the space is there.
Both deal every card face up, but Fortress builds up or down in suit while FreeCell builds down in alternating colours. Fortress also has no free cells: empty tableau columns are the only spare space.