First plan
Look for a same-suit descending tail that can move as a group and expose a useful card. Each suit has two Ace foundations; compare which duplicate Two or Three is available before advancing one.
Castle games · The Ramparts
Two standard decks, all 104 cards face up. Eight aces start the foundations; the remaining 96 cards fill eight columns of twelve. Build sequences down in suit, move them as a unit, and fill all eight foundations from Ace to King to win.
Select a card or sequence, then choose a highlighted destination.
Look for a same-suit descending tail that can move as a group and expose a useful card. Each suit has two Ace foundations; compare which duplicate Two or Three is available before advancing one.
Beleaguered Castle permits a single exposed card to build down by rank regardless of suit. Tableau Solitaire requires the same suit but allows a complete descending suit tail to move together.
Moving an Eight–Seven–Six tail of one suit onto an exposed Nine of that suit uncovers the card below the Eight in one move. Moving just the Six leaves the Eight and Seven in place.
Tableau Solitaire is part of The Ramparts · Castle games and is a variant of Beleaguered Castle.