Colorado Solitaire is a two deck solitaire card game where the player is dealt 20 cards into 20 piles. The player has 8 foundations, four of which must be built up from Ace to King, and the other four must be built down from King to Ace. The player can deal cards from the stock pile, one at a time, and must place them immediately onto one of the 20 piles. The piles do not need to be built on, a card from the stock can be placed onto any of the piles without regard to rank or suit. Only the top card on these piles can be moved to the foundation, and cards in the piles can not be moved between the piles.