21 Blackjack Rules
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How To Play 21 Blackjack

Either laboriously memorizing the table or keeping the table handy while you play seems like a lot to ask for an edge that's not that much lower than blackjack (0.43% in Atlantic City), but if you're tired of playing blackjack, or if every hundredths of a percent of edge is important to you, then you might like Spanish 21. Play for fun first if you want to learn the game properly – This is especially important when playing Spanish 21 as there are different features and rules than in standard Blackjack. We, therefore, recommend you play with free chips until you get the hang of this version when you have a better.

Dec 01, 2013 It appears that the HE of Blackjack Switch (adjusted to 0.39%) is better than the most common low limit games where the dealer hits on Soft 17 and actually only marginally worse than the HE of the less common game where the dealer stands on Soft 17. Even Spanish 21 has a HE of 0.47%. However, in a perfect blackjack strategy, you’re actually better off standing if your hand is comprised of three cards. This is because the fact that there are three low-value cards in your hand reaching a low total means that there are fewer low-value cards left in the deck than when at the start of the game. Apr 11, 2019 Blackjack: 5 Reasons Why it is Better Than Poker. Poker is hitting a huge boom all over the place from the best online casinos to the huge World Series of Poker, but when it comes right down to it Black Jack is still the biggest game and the most fun to play.

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Introduction

Blackjack switch is a blackjack variant which allows the player to do what is normally considered a classic cheating manoeuver, trading cards between two hands. The player must make two bets of equal size and is allowed to switch the second card dealt to each hand. Of course, nothing good comes without a trade-off. In this case a dealer 22 results in a push against all non-busted hands and blackjacks pay even money.

The game goes by the name Blackjack Exchange at the Bregenz Casino in Austria.

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Rules

All rules are based on conventional blackjack unless otherwise noted.
Six or eight decks are used.
Dealer usually hits a soft 17. I hear in Ontario, Canada, the dealer stands on soft 17.
The player must make two bets of equal size.
Cards will be dealt face up.
Dealer will peek for blackjack with an ace or ten up. If the dealer has a blackjack all player hands will immediately lose, except a player blackjack will push.
The player may switch the second card dealt to each hand. For example, if one hand has 5,10 and the other has 10,6, the player may switch the 10 and 6 to have two hands of 11 and 20. The player may also switch cards to form a blackjack.
If the player switches to a blackjack, it counts as 21 points.
Player may double on any 2 cards.
Player may double after a split.
Player may resplit up to four hands.
Winning player blackjacks pay even money.
A dealer total of 22 will push against any player total of 21 or less. A player blackjack will still beat a dealer 22.

Russian Rules: Same as the rules above, except early surrender allowed (sometimes not against an ace), dealer does not take a hole card, and dealer stands on soft 17.

Playing Strategy

The following tables show the basic strategy under the 8-deck Las Vegas rules after the switch decision has been made. The reason for the differences compared to conventional blackjack strategy is the push on 22 rule.

If 6 decks are used the player should double 9 against a 5.

At this time I have not created a strategy for the Russian rules or Ontario rules.

Simple Switching Strategy

The following is the 'Cindy Liu Simple Switching Strategy,' appropriate under the Las Vegas rules. It is based on the following list of hands in order of strength:

21
20
19
AA
11
10
9
18 or 8
8,8 with 2-8 up

Following is how to use it.

Against a dealer 7 or 8, balance the hands, by making the weaker hand as high as possible, using the above scale of hands, if you can.
Against any other dealer up card, maximize the strength of the higher hand, using the scale above, if you can.
If you can't achieve one of the desired hands in the list, then make the strongest hand possible from the following list, in order of strength:
- 7 or 17
- any hand that should be split
- any 12
- any 13
Exceptions:
- With A,A + 3,8 — keep the aces together.
- With A,A + 2,9 — keep the aces together if the dealer has 2-6
- With A,A + 2,8 — keep the aces together

The simple strategy, compared to optimal strategy, results in a cost of errors of 0.17%. It results in an error once every 18.6 hands, and an error with an expected value of more than 10% once every 82 hands.

Advanced Switching Strategy

The following is the 'Cindy Liu Advanced Switching Strategy,' appropriate under the Las Vegas rules. To use it, add up the points for each hand for both ways to play them, and play the one with the greater number of points. In the case of a tie, use the the simple strategy.

Let's look at an example. Suppose you have 8+4 and A+8 against a dealer 6, where the underlined card is the second one dealt. So you can play (1) 12 and soft 19, or (2) 8-8 and soft 15. Which pair of hands is better? According to the table, the 12 is worth 0 points and the soft 19 is worth 1, for a total of 1. For the alternative, 8-8 is worth 1 and the soft 15 is worth 1, also for a total of 2. So the odds favor switching to 8-8 and soft 15. Note that the simple strategy would incorrectly advise the player to not switch. My Blackjack Switch appendix 1 shows that the combined expected value of 12 + soft 19 is -0.2108+0.3634=0.1526, and 8-8 + soft 15 is higher at 0.1461+0.0365=0.1824.

The cost of mistakes in the advanced strategy, compared to optimal strategy, is 0.08% only. The player will make an incorrect decision once every 24.5 hands, and a mistake with an expected value over 10% once every 250 hands.

21 Blackjack Rules

I also have a printer friendly version (PDF) of both switching strategies, as well as the basic strategy.

Arnold Snyder Switching Strategy

The Big Book of Blackjack by Arnold Synder contains an easy and intuitive switching strategy. Out of respect for copyright, I won't say more than that about how it works. According to Cindy Liu, the Sndyer strategy results in a cost of errors of about 0.2% compared to optimal strategy. Besides that, I highly recommend the book for breaking new ground in blackjack, which is not easy to do any more.

Switching Calculator

My Blackjack Switch calculator, courtesy of Jing Ding, will advise when to switch in any situation. The calculator is based on the Playtech rules and an infinite deck assumption.

House Edge

Under the standard Las Vegas rules, with six decks, the dealer hits a soft 17, and a switched blackjack counts as 21 points, the house edge is 0.58%, assuming optimal strategy. Follow are the effects on the house edge of some rule variations:

Eight decks: +0.02%
Switched blackjack automatically wins: -0.40%
Blackjack automatic winner: -0.21%
Dealer stands on soft 17: -0.30%

The house edge under the Russian rules is 0.20%, assuming early surrender against an ace is allowed.

Do you have poker friends who play deluxe poker games online, f

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