1 deck. Easy. No redeal.
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Doublets Solitaire uses one deck (52 cards). You have 12 tableau piles with 4 cards in each pile. Only the top cards are face up. The remainder of the cards are dealt to reserve pile.
The object of the game
To discard all the cards in pairs of the same rank.
Select pairs of cards of the same rank by using the mouse. The top cards of tableau piles are available to play. Spaces are automatically filled from the reserve.
Easy to win.
There is no redeal.