Spider is a type of solitaire card game. It is one of the more popular two-deck solitaire games. There are several variants of spider, such as Relaxed Spider or Spiderette. The former doesn’t require all spaces to be filled before redealing, while the latter is played with only one deck. There are also three deck (Spiderwort) and four deck (Gigantic Spider) variants of Spider Solitaire.