Question: Blackjack Switch is a casino gambling game invented by Geoff Hall, and patented in what year, natural blackjacks are paid 1:1 instead of the standard 3:2, and a dealer hard 22 pushes all player hands except a natural, a croupier or dealer is someone appointed at a gambling table to assist in the conduct of the game, especially in the distribution of bets and payouts?
Sentence (from "Blackjack Switch"): It is based on blackjack, but differs in that two hands, rather than one, are dealt to each playing position, and the player is initially allowed to exchange ("switch") the top two cards between hands.
Relevant evidence: No