Play Castle Mount Solitaire Online for Free (No Signup Required)

Beleaguered Castle goes triple-deck: twelve columns of twelve cards guard twelve Aces already on the foundations. Medium difficulty, roughly 45% to win.

Castle Mount Solitaire is Beleaguered Castle rebuilt on a mountainous scale. Thomas Warfield designed it as a triple-deck version of the classic: all twelve Aces begin on the foundations, and the remaining 144 cards are dealt face-up into twelve towering columns of twelve cards each. Stacking twelve columns of twelve cards apiece is what keeps this at medium difficulty, with the win rate landing around 45%. Across all three decks, skill decides the outcome far more than luck does.

What keeps such a mass of cards manageable is one merciful change to the parent game's rules: although the columns build down regardless of suit, a descending run of cards in the same suit may be picked up and moved as a single unit. Assembling those same-suit runs — and clearing a column or two to use as staging space — is the heart of the strategy, since an empty column will accept any card or movable sequence.

Beleaguered Castle Solitaire, Streets and Alleys Solitaire, and Citadel Solitaire share this same castle-clearing core, just at different scales.

If you run into anything odd or have an idea that would make the game better, please contact me.

Enjoy playing!

How to play Castle Mount Solitaire

Layout:

12 foundation piles: Build up from Ace to King in the same suit. The twelve Aces are dealt here at the start of the game.

12 tableau piles: Build down in any suit. Descending same-suit sequences may be moved as a unit, and any card may fill an empty space. Each pile is dealt 12 cards face-up.

Foundation:

There are twelve foundation piles.

Each foundation pile is handed an Ace at the start of the game.

A card can be added to a foundation pile only if it's one rank higher and the same suit as the pile's current top card, so the only card that fits on a J of diamonds is a Q of diamonds. There can be no more than 13 cards in a pile.

The top card of each foundation can be moved back into play if another pile will accept it.

Tableau:

There are twelve tableau piles of twelve cards each. Every card is dealt face-up.

A card can be added to a tableau pile only if it's one rank lower than the pile's current top card, regardless of suit, so a 7 of any suit fits on any 8.

Cards on the tableau that are not covered by another card are free to be played onto the foundations or any other tableau pile. In addition, a descending sequence of cards in the same suit may be picked up and moved to another pile as one unit; mixed-suit sequences must be moved one card at a time.

Any card, or any movable same-suit sequence, can fill an empty slot in the tableau.