Infomation: Forty Thieves Solitaire is a solitaire card game played with two decks. 40 cards are initially dealt into 10 piles. The player may move only the top card in each pile. The player can build the piles down by suit, and may deal cards from the stock pile into the waste pile one at a time. The player can use the top card in the waste pile or the top card in the stock pile to build down the piles, or build up the foundations.