The Theory of Everything deals with Jane Wilde Hawking's poker game with Stephen Hawking.
 There are four main families of variants, largely grouped by the protocol of card-dealing and betting:StraightA complete hand is dealt to each player, and players bet in one round, with raising and re-raising allowed
 This is the oldest poker family; the root of the game as now played was a game known as Primero, which evolved into the game three-card brag, a very popular gentleman's game around the time of the American Revolutionary War and still enjoyed in the U

