Blackjack is a popular comparing card game.
The decks of cards are shuffled and placed into the shoe, from where cards are drawn. If the shoe is empty, it is refilled completely.
The better hand wins the bet amount.
If the player has a natural blackjack while the dealer does not, a bonus is paid on top.
If the player's hand busts (exceeds 21), the dealer wins.
If the hands are otherwise equal, it is a "push" and neither side wins.
Hands are ranked from best to worst in 21 categories:
Jack, Queen, and King are equivalent to 10. Ace has a value of 1 or 11.
The hand value is intuitively the best possible sum of card values.
Formally, the hand value is the hard hand value if the soft hand value exceeds 21; otherwise, it is the soft hand value. The hard hand value is the sum of card values, treating Ace as 1. The soft hand value is the hard hand value, plus 10 if there is at least one ace.
Intermissions last up to 30 seconds, ending early if all players are ready.
Each turn lasts up to 20 seconds, with automatic Stand. Unused turn time cannot be carried to future turns. There is only a turn timer, not a game timer.
Blackjack pays 3 to 2 (50% bonus), so bets must be an even integer. Paying 6 to 5 would require bets to be multiples of 10. This option might be added in the future.
Balance changes are negated.
Play with the simpler rules of 21, without the new rules in Blackjack. Just Hit or Stand, without worrying about splitting, doubling, surrendering, or insurance.
Number of decks to use. 9 is treated as ∞ decks. Increases house edge.
Dealer hits on soft 17 instead of standing. Increases house edge.
Dealer peeks and, after early surrender, ends the game immediately if there is a blackjack. Decreases house edge.
Typically on in American and off in European games.
Doubling is allowed when the hand value is
Later options increase house edge.
After splitting, allow doubling each hand separately. Decreases house edge.
Surrendering is allowed when
Pairs of 2 to 10 can be split N times to make N+1 hands. Decreases house edge.
Pairs of aces can be split N times to make N+1 hands. Decreases house edge.
Allow hitting split aces. Decreases house edge. If hit with a 10, the blackjack is not a "natural" blackjack.