Spider-Solitaire. Black Widow Solitaire. It is the difficult mode of spider solitaire which is played with two decks of cards with their 4 suits. You will have to arrange the spider solitaire cards in descending order until you complete stairs of the same suit from king to ace. Drag one or more consecutive cards across the board with the mouse pointer, always of the same suit and if you make a mistake, the game lets you rectify up to the last 3 moves made. When you run out of movement options, deal the cards from the deck that is in the upper left margin. Each ladder that you complete will be removed from the board occupying one of the gaps in the upper margin, until completing the number of 8 and winning the game