1 deck. Easy. No redeal.
Prison Solitaire uses 52 cards (1 deck). First card dealt to the first foundation pile is the starter card of the foundations. The three other cards of the same rank will be placed next to it during the deal. 40 cards are dealt into 10 tableau piles (4 cards per pile). Eight cells (reserves) are placed above the tableau piles. At the start of the game 1 card is dealt to each cell.
The object of the game
To build the foundations up in suit until each pile contains thirteen cards.
The top cards of tableau piles and cards from cells are available to play. You may build tableau piles down in suit. Only one card at a time can be moved. The top card of any tableau pile can also be moved to any cell. Each cell may contain only one card. Cards in the cells can be moved to the foundation piles or back to the tableau piles, if possible.
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 empty cells, because you would have been able to get the same result by temporarily moving the extra cards into the empty tableaus.