Black Widow Solitaire is a variant of Spider Solitaire. This uses all four suits for game play.
The game is played similar to Spider Solitaire in which tableau is built down by rank, irrespective of suit. The difference between Black Widow and Spider Solitaire is that in Black Widow Solitaire all in-sequence cards irrespective of their suits can be moved between the piles where as Spider Solitaire allows only for in-suit sequence to be moved. Rest of the gameplay is exactly like Spider Solitaire.