Forty Thieves is the two-deck patience with no free cells and a strict one-card move.
Goal
Build eight foundations from ace to king, four per suit, from two decks.
How to play
Build the ten columns down in suit, one card at a time. The stock is dealt one card at a time into a single waste pile.
Tip
With no free cells, empty columns are your only storage: plan how to earn one.
Variations
Forty Thieves · Indian — Move same-suit runs · Build down: By alternating colour.
Play Forty Thieves