1 deck. Difficult. No redeal.
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Castle Solitaire uses 52 cards. You have 10 tableau piles with 5 cards per pile. The two last cards are placed above on reserve piles. Four foundation piles are placed next to the reserve piles.
Aces are moved to the foundations as they become available.
The object of the game
To build the foundations up in suit to kings.
The top cards of tableau piles and cards from reserve piles are available to play. You can build tableau piles up or down in suit. Only one card at a time can be moved. When any reserve piles are empty you can fill the space with any card. Each reserve pile may contain only one card.
There is no redeal.
The rules state that you can move only one card at a time. But as a shortcut, BVS Solitaire will allow you to move a full or partial build if there are enough empty tableau and reserve piles, because you would have been able to get the same result by temporarily moving the extra cards into the empty tableaus.