Fortress

Fortress

• 52 physical cards. Columns start with 6, 6, 5, 5, 5, 5, 5, 5, 5, 5 cards.
• Build one rank up or down in suit, without Ace–King wrapping. Move one exposed card at a time.
• Any single card or legal group fills an empty column. No stock or redeal.
• Build 4 suit foundations Ace to King. Foundations are one-way; Undo reverses moves.

Undo/redo restore the full state. Restart repeats the deal; New deal replaces it. Progress stays in this browser, independently for each game.