Spider Solitaire is one of the youngest versions of the solitaire card game, believed to be created in 1949. It got its name because the game's goal is to move all cards into eight foundations similar to the number of legs of an actual spider.

It's a simple game that uses a standard 52-card deck. 

The object of the game is to move all cards from the foundations to the foundations. They can be moved either to a free space on the grid, or to a foundation. A foundation is a row or column of cards that is locked and cannot be moved. A free space is an empty row or column on the grid.

To move a card, you need to expose the card you want to move. To expose it, you need to either move it to the left, right, down, or up. Once it is moved, it can no longer be moved back to the foundations.

If there are no more left on the foundations, the game is over.