Forty Thieves Solitaire - Version 1.0 Forty Thieves Solitaire is a free 2 deck solitaire card game for the PC. It is called Forty Thieves, because the game starts out with 40 cards dealt into 10 piles of 4 cards each. It is a building solitaire game where the player moves the top card in the piles to try and build up the foundations, or build down the other piles. The player may deal a single card at a time from the stock pile when the cards available aren't adequate.