2 Pass Emperor Solitaire

2 Pass Emperor Solitaire is a more difficult version of Emperor Solitaire where the player is only allowed to pass through all the cards in the stock pile twice. Once the player has dealt all the cards from the stock pile to the waste pile, he may move all the cards from the waste pile back to the stock pile once. The player may then pass through all the cards in the stock pile a second time. If the player fails to place all the cards into the foundations after this second pass through the stock pile, the player does not win the game.