Play Fortress Solitaire Online for Free (No Signup Required)

Fortress is a fun Solitaire variation and is free to play online. A feature-rich full-screen card game with daily challenges, winnable deals, hints, and undo's. Fortress Game Layout

An ancestor of Beleaguered Castle that may be built both up and down in the tableau.

The fortress was built in the 1870s. The game is difficult, with an 11% chance of winning. It is played with a single deck, and your odds of victory are primarily determined by your talent.

Other solitaire games comparable to this one include Chessboard, Beleaguered Castle, Streets and Alleys, Citadel, Castles End, Bastion, Lasker, and Fortress Moat.

If you enjoy Fortress, try original Solitaire, a classic solitaire card game.

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Enjoy the game!

How to play Fortress Solitaire


4 foundation piles: Build up from Ace to King in the same suit.

10 tableau piles: 10 tableau piles that may be built up or down by suit. Only the top card of each pile is playable. Any available card may be used to fill any open space. At the start of the game, 6 cards are dealt face-up to the first two piles, and 5 cards to the remaining piles.


There are four foundation piles.

Any ace in the foundation may be transferred to any vacant pile.

A card may be added to a foundation pile if it is one higher than the pile's previous top card and is of the same suit. As a result, the only card that might be played on a 4 of diamonds is a 5 of diamonds.

Cards cannot be taken from the foundation after they have been placed.


Ten tableau piles of cards, the first two with six cards each and the last eight with five cards each. Every card is dealt face-up.

A card may be added to a tableau pile if it is one higher or one lower than the pile's previous top card and is of the same suit. As a result, the cards that may be played on Q of clubs would be J or K of clubs.

Cards on the tableau that are not covered by another card are free to be played onto the foundation or any other tableau pile.

Any card can fill an empty slot in the tableau.

Technically, only one card may be moved at a time, but because super-moves are allowed, we will allow you to move sequences when there are enough vacant tableau columns to achieve the same result with a series of single card movements.