Spider Solitaire is a popular two deck solitaire card game, where the aim is to build 8 columns of cards from King to Ace without regard to suit, and remove those cards from the table as you build them.
At the beginning of the game, 54 cards are dealt into 10 columns. 6 cards are placed in the first 4 columns, and 5 cards in the remaining 6 columns. The last card dealt into each of the columns is turned face up. In a table game of solitaire, all the cards in the deck are used, and the player ignores the suit looking only at the value on the card. In a computer version of the game, the cards are frequently made to be all the same suit, in order to prevent any confusion. After the 54 cards are dealt into the ten columns, the remaining cards are placed in a stock pile, to be dealt into the columns as needed later.
The top card in any of the columns can be moved between the columns. Also any fully packed series of cards can be moved between the columns. A fully packed series of cards is any series that is in order starting with the lowest card in the column, where the card above it in the column is either not in series, or flipped face down.
At any time you can deal an addition 10 cards into the columns from the stock pile. The cards that are dealt are turned face up, and go over top the lowest card in each of the columns. The player may do this up to 5 times in a game. It is usually best to wait until you are stuck and unable to make any other moves before clicking the stock pile to deal out additional cards.