Ace-seven is by far the most difficult hand for the professional blackjack player to handle. Depending on what the dealer is showing, you will either hit, stand, or double down.

• Blackjack Double Down Meaning
• Double Down Blackjack
• Ace Blackjack 21

Blackjack Double Down Meaning

Basic Strategy tells us that we should double if the dealer is showing 3 through 6, stand on 2, 7, and 8, and hit on 9, 10, and A. This may come as a shock to some since common sense tells us to stay with an 18 regardless of what the dealer has. Let's look at the math behind the strategy.

First, we must look at A-7 as a plain old 18. Basic Strategy dictates that we stand on a pat 18 regardless of what the dealer is showing; we want to get to 17 or higher and then let Lady Luck determine the outcome. This isn't necessarily the case for a soft 18.

• If the dealer is showing a 2, the return on an 18 is $.12 for each dollar invested.
• For 3 through 6, this jumps up ranging from $0.40 to $0.50 per dollar.
• 7 is also $0.40.
• At 8, it goes back down to $0.11.
• 9 through A plummets into a negative return of $0.18 to $0.10 loss per dollar.

• Sep 04, 2001  How do you play a two-card 11 against ace-up in blackjack? Some stalwarts double - particularly at tables with 'peek-a-boos' when they know the dealer doesn't have a natural. Basic Strategy dictates doubling in one-deck games and in two?deckers when the 11.
• Mar 21, 2019  An example—”the Reno rule” only allows doubling down on a hard 9, 10 or 11. European Blackjack Rules. That is similar to the European variation of only being able to double down on a hard 10 or 11. This rule is not favorable to the player because doubling down with a soft 12-18 is favorable in a lot of situations when playing 21.

Oct 06, 2012  If your casino has the OBO or OBBO rules, you can use most of the basic strategies in books and on the internet. If your casino has the European No-Hole-Card rule, just remember that you should never double down on 11 versus dealer 10, split Aces against a dealer Ace or split 8’s against a dealer 10 or Ace.

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So is it really worthwhile to go against the common sense factor and hit an 18 if the dealer is showing 9-A?

Double Down Blackjack

• Hitting A-7 on a dealers 9 gives us a negative return of $0.10,
• 10 a negative return of $0.14, and
• Ace a negative return of $0.09.

The spread here, while not seeming like much, is less than the -$0.18 to -$0.10 return of staying. To minimize the damage, hitting on these cards is a necessity.

Doubling is the third option with this hand. In this case, you count the hand as an 8 and pray for a 9 or 10, or you count it as an 18 and hope for an Ace through 3.

First of all, doubling when the dealer is showing:

• 9 through A gives us a -$0.29 to -$0.36 return, far greater of a loss than hitting. So doubling on those cards is out of the question.
• Doubling on 8 is also a negative return (-$0.03), whereas it's a positive return to hit. Again, out of the question.
• Doubling on 7 is a positive return of $0.22, which is less than the $0.40 you will get with staying. If the dealer is showing a 7, it makes economic sense to stand.
• Doubling on the dealer's 2 is also $0.12 return, but it is less than a cent less difference of a return than standing. In the long run, this adds up to major dollars, believe me. You will want to stay rather than risking the double in this case.
• That leaves 3 through 6. The math here gets tricky, so pay careful attention. The numbers above regarding standing on 18 don't take into account the power of the Ace. As you know, the Ace can be counted as either a 1 or an 11, and because of this, hitting on A-7 is not nearly as dangerous as hitting a pat 18. In fact, the 23% (3/13) chance of drawing a card to better your 18 makes the diminished return on doubling the right move.

While the return ranges from $0.18 to $0.38 (compared to the $0.40 to $0.50 of staying), the 23% odds of improving plus the doubled amount of money pumped into the hand make doubling the most profitable choice.

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Ace Blackjack 21

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