Spider is played with two card decks. The cards are dealt out into 10 playing piles, 4 of 6 cards and 6 of 5 cards each. This leaves 50 cards that can be dealt out 10 at a time, one on each playing pile.
In the playing piles, a card can be placed on another card of any suit and of one higher value. A sequence of ascending cards of the same suit may be moved from one playing pile to another.
The goal of spider is to put all cards as real families descending from Kings anywhere in the playing piles. When such a family is built in a playing pile, it is removed to the lower-left corner of the window.