1. Blackjack Rules Double Down Poker
2. Rules Of Blackjack
3. Blackjack Tips

Aug 12, 2019 Use the blackjack double down on any of the dealer’s card below seven except ACE. This rule only applies to when you have a hard 9, meaning you don’t have an ACE at hand. So, you can have a combination like 4-5, 3-6, or 2-7, but if you have an ACE-9 that’s a soft 9, and you shouldn’t use the. In the game of blackjack, you have the option to double your bet and receive another card as a move. This is called doubling down, and it comes with a few rules. When you double down, you can’t hit again, and you need to wait for the next betting round. While this move can improve your chance of winning, you need to understand when to use it. The beauty about Blackjack Double Down is that there are some useful and well defined rules based on mathematical probability and tested by generations of players. That said, the calculability of a hand’s success is not a guarantee of its profitability, nor does it rob the game of its excitement. When the blackjack rules allow players to double after splitting the casino loses a bit of their advantage. Generally, the more restriction on the players making this wager the higher the house edge for the casino. Always look for the most player-friendly blackjack rules in the casino to get the best returns.

Blackjack is one of the casino games with the lowest possible house edge, which can be attributed to its favourable set of rules. One such rule that works to the benefit of players is the double down option. It enables you to increase your initial bet when you find yourself in advantageous situations.

Doubling down can be both exciting and profitable for the player provided that they know when to make this move correctly. The situations when this play becomes optimal do not occur all that often at the blackjack table. One must learn to identify them in order to extract the most value from doubling their wagers.

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Regrettably, many blackjack players do not recognize the correct spots that call for a double down and end up losing tons of money as a result. In this article, GamblingPlex expands on what doubling down is in blackjack, provides readers with some strategy hints for this move, and explains why you should never double down for less than your original wager.

How to Double Down in Blackjack

To begin with, doubling is available to players only on their starting hands before they have drawn any more cards to their initial totals. When a player wishes to double their bet in the game of blackjack after their hand has been dealt, they can do so by signalling they want a double down. The hand signal used in shoe games differs from that in single-deck and double-deck variations.

In multi-deck blackjack where the cards are dealt out of a shoe, you double down by posting an additional wager up to the amount of your original wager and pointing towards your betting box. You place the extra chips in your betting box next to your initial bet but never on top of it.

This is for the benefit of the dealer, allowing them to easily distinguish your double down wager from your original bet. The dealer will then draw no more than one card to your starting hand. The third card is usually placed perpendicularly, next to the first two cards, to indicate this hand has been doubled on. There will be no more cards dealt to that particular hand.

When playing single-deck and double-deck blackjack, you double down by making an extra bet and placing your first two cards face-up on the layout. The dealer would then tuck the third card under your chips.

The third card is dealt face-down in this case and is exposed after the dealer has finished playing their hand. This further adds to the excitement of doubling, especially when the dealer busts. With that said, players in hand-held games are permitted to peek under the double-down card to see its value but should do so without exposing it. The profits or losses you register during this round are based on the new overall wager.

For example, if you had initially wagered $10 and have doubled for the full amount of $10, you now have a total of $20 in action and will win $20 on top of that, for an overall payout of $40. If the dealer beats you, you will lose $20 rather than $10 only.

The OBO Rule

This is not the case in many European variations where no hole cards are in play. The dealer receives one exposed card during the initial deal and does not draw a second one until after all patrons have finished playing their hands.

Such games usually implement the so-called “original bets only” rule, abbreviated as OBO. Whenever the dealer hits a blackjack, players would lose only their initial wagers under this rule. Additional bets made on doubling and splitting push and are returned to players.

Choosing a Blackjack Table

Doubling is an interesting choice, and it could pay quite well when done properly. However, you should not forget to check the specific rules that apply to doubling at your chosen table before you sit down. Blackjack is infamous throughout the gambling world for its diversity when it comes to rules. Playing conditions would often vary not only between different casinos but between different blackjack tables within the same gaming venue.

Before you sit down, check whether you can double on any two cards or just on hands with totals of 9, 10, and 11. When restricted to doubling only on these three hands, players suffer a house edge increase of 0.09%. Some tables are even more restrictive, allowing you to make this play only on two-card totals of 10 and 11, which adds 0.18% to the casino advantage.

Another thing worth checking beforehand is whether the table supports doubling after a split (DAS). The absence of DAS also leads to an increase in the house edge, this time by 0.14%.

Blackjack Rules Double Down Poker

Keep in mind that the exact doubling rules, applicable at a given table, are not displayed on the layout as is the case with the dealer’s standing total and the blackjack payouts. We suggest you ask the dealer or the pit boss before you take a seat if you are unsure whether you can double on any two-card hand.

When Should You Double Down?

New players usually rely more on their hunches and intuition when doubling, which often leads to bad decision-making and unnecessary frustration. As exciting as it is, doubling is not the optimal move at all times. This play is recommended only on specific two-card hands against certain upcards that put the dealer in a weak spot.

It makes no sense to increase your wager against a dealer who shows strong upcards, if you, yourself, have a bad starting total like 12 or 15, for example. One situation where doubling down has been proven to show the best results is when a player is holding a total of 11 against a dealer with a 6. The probability of the dealer busting with this upcard is a little over 42%.

Meanwhile, your chances of prevailing with a total of 11 against the 6 are inevitably higher than 50% regardless of the exact composition of your hand as you can see below. Doubling down when the odds are on your side will have an overall positive effect on your profitability. The figures correspond to a six-deck S17 game where the peek rule is in place.

The optimal plays for doubling are covered by basic strategy, which is presented in the form of a chart. You can start seeing more profits from your double downs if you stick to basic strategy. Feel free to consult with your strategy card when playing online or at a landbased casino until you learn all the correct moves by heart.

Doubling on Hard Hands

Before we proceed any further with strategy hints, we would like to specify that the correct doubling moves may differ, depending on whether you have a hard or a soft total. A hard hand is one that either lacks an ace or has one, but its value is 1 only.

Doubling on hard totals of 12 or higher is never recommended since your chances of busting are greater and you risk losing twice as much money. The higher the hard total, the higher your chances of going over 21 by drawing a third card.

You can find the correct moves for doubling below but keep in mind they correspond to six-deck games with DAS under the S17 rule for the dealer. Some of the playing decisions are different when you double against a dealer who hits soft 17 (H17). Certain moves also vary based on deck number. Refrain from using multi-deck strategy cards for single-deck and double-deck blackjack to prevent potential playing errors.

• Double down on hard 9 when the dealer’s exposed card is 3, 4, 5, or 6.
• Double down on hard 10 against all dealer upcards except for 10 and ace. This applies also when you get dealt a pair of 5/5, which you should never split. You double down on your 5/5 against dealer upcards 2 through 9, instead.
• Double down on hard 11 against all exposed cards of the dealer except for the ace. On a side note, players are recommended to double even against the dealer’s ace in shoe-dealt H17 blackjack.

Doubling on Soft Hands

Soft hands call for a different approach because they contain aces whose value fluctuates. The aces can be assigned a value of either 1 or 11, based on the holder’s preferences. You have more chances of making successful doubles with such hands because the ace’s flexibility prevents you from going over 21 by taking one more card from the dealer.

The worst that could happen is for you to get dealt a small-value card and end up with a low hand total. It is also possible to catch a ten-value card and transform your hand from a soft one into a hard one.

Here is an example. You have A/5, or soft 16, which you can treat as either 6 or 16. The dealer’s upcard is a 6 which calls for soft doubling. The dealer pulls out a King for your double down and you get stuck with a hard 16. Check out the plays recommended below. They are again optimal in multiple-deck blackjack where the dealer is required to stand on soft 17 (S17).

• Soft 13 (A/2) and soft 14 (A/3) require a double down when the dealer’s exposed card is 5 or a 6.
• Soft 15 (A/4) and soft 16 (A/5) call for a double when the dealer shows a 4, 5, or 6.
• Soft 17 (A/6) and soft 18 (A/7) require a double when the dealer’s upcard is 3, 4, 5, or 6. In H17 games, you double on soft 18 against the dealer’s deuce as well. Soft 19 (A/8) also calls for a double down against the dealer’s 6 in H17 games.

Should You Double for Less?

As we told you earlier, you can double down for an amount up to your original wager although no one prohibits you from doubling for less than what you have initially bet. For instance, if you have originally wagered $20, you can double for $15, $10 or even $5.

In fact, this is possible in almost all landbased casinos. However, you must always double for the full amount when playing online randomly generated variations of blackjack. Many rookies or players with tight bankrolls prefer to double for less, mainly because they feel uncomfortable with exposing more money at risk by covering their initial wagers in full. Others skip on doubling altogether by hitting or standing, both of which do not require them to invest more money.

How Doubling Compares to Hitting

It is no coincidence doubling down is recommended over hitting and standing in certain cases. You are entitled to no more than one card when doubling, which is why you sometimes get stuck with bad stiff hands like hard 15 or hard 14.

Since it is impossible to hit after a double down, the percentage of the times when you beat the dealer with doubling is smaller than that for hitting. However, the small difference in win rates is offset by the larger profits you receive for successful doubling.

Suppose, for instance, you receive a total of 11 against a dealer with a ten-value card. As you can see from the strategy hints, this situation calls for a double down in shoe games with the S17 rule. Your 11 will win against the ten-value card 56 per every 100 hands if you hit and 54 per every 100 hands if you double down.

Respectively, you will have 54 x $20 = $1,080 in earnings, if you double for the full amount on a $10 initial wager. Your losses with 11 against the dealer’s ten-value card will be 46 x $20 = $920 on average. You will win approximately $160 every hundred hands in the long term.

Meanwhile, your earnings when you hit your 11 against the dealer’s ten will amount to 56 x $10 = $560 whereas your losses will be 44 x $10 = $440. Thus, hitting yields net profits of $120. This leads us to the logical conclusion doubling on 11 against the dealer’s 10 is better for the player than hitting because it yields $40 more in profits per every hundred hands on average.

Doubling for Less vs. Doubling for the Full Wager

Similarly to hitting your 11 against the dealer’s ten, doubling for less on this hand is nonsensical from a basic-strategy perspective. The whole purpose of doubling is to enable the player to boost their gains when in favourable situations. This is impossible unless you double down for your full wager.

This becomes blatantly obvious when we continue with our example where your main bet is $10. Only this time, you choose to double for $5 only instead of hitting. Your average earnings per one hundred hands will be equal to 54 x $15 = $810 whereas your average losses will be 46 x $15 = $690 if OBO is not in place.

This makes for overall net winnings of $120, which is again $40 less than the average earnings you will register when you double for the full amount. This sum will drop further down if you are a scrape enough to double down for one-fourth of your initial $10 bet, or $2.50.

In this scenario, your average wins per one hundred hands will amount to 54 x $12.50 = $675 whereas your losses will add up approximately to 46 x $12.50 = $575. Your total of 11 will earn you only $100 against the dealer’s ten in the long run.

It is easy to see why doubling for the full amount is the best course of action, compared to hitting or doubling for less. This applies to all correct doubling plays, not only to a total of 11 against a ten.

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Double Down? So what does Double Down mean in Blackjack and why is it such a popular strategy?

In short, it is bumping up your initial bet by 100% and staying in the game after only receiving one more card. It might seem like a risky strategy and for some doubling their winnings is the main motivator, but there can be some good reasons behind such a bold move.

The beauty about Blackjack Double Down is that there are some useful and well defined rules based on mathematical probability and tested by generations of players.

That said, the calculability of a hand’s success is not a guarantee of its profitability, nor does it rob the game of its excitement.

Watch a tutorial here. Credit: androidslots.co.uk

Blackjack Double Down – A Numbers Game

Firstly, however green you are to Blackjack, we can all agree that the highest number you can sensibly get is 21. Secondly, we’re out to beat the dealer, either by having the higher value hand, or watching them go bust.

From there on in it’s a case of using statistics to your advantage. This means that whenever you’ve drawn one of the lower 6 cards, there remains a high statistical probability that the remaining cards are all more likely to be a help rather than a hindrance.

Equally, when the dealer draws a 4; 5; or 6, they are statistically more likely to go bust. It therefore seems quite reasonable that when these two scenarios are in play, Blackjack Double Down may well be a good payoff.

Jumping the Gun

Sadly, many players can become a little hyper focused, looking at only the dealers hand or their own and basing their decision to Double Down on that one factor.

For example, many players will draw a 9 and Double Down if the dealer has anything other than a 10. This is strategically flawed and will lead to a significant loss over time.

The other ill-judged manoeuvre is for a player to split a pair of 5’s, which in itself is a risk. A sensible rule here is to keep them together and treat them like a 10. That way you stand a better chance when Doubling Down.

Blackjack Double Down Rules

Rules can vary slightly between casinos, but generally Doubling Down can be used after the player draws their first two cards. Some venues, both online and real-world allow Doubling Down on a Blackjack, whilst others can restrict its use to totals of 9; 10; or 11.

Wherever you play, make sure you know the house rules before you play.

Where it is permitted, splitting a hand into a pair and then doubling down can be useful, but as already mentioned, use this with caution.

Once you have signalled your intention to Double Down, you place your wager. Normally this is 100% your original bet, though some casinos will allow a less-than-double additional wager.

Once you have signalled your intention to Double Down, or simply pressed the relevant button in an online casino, only one more card can be drawn for the player, and they are committed to play.

How to Double Down in Blackjack?

Plenty of rookies have come unstuck, learning the various strategies for making a good Blackjack Double Down play, but not paying attention to its execution.

Etiquette and protocol are a must if you’re not going to spoil the atmosphere at the table. Thankfully online gaming has made the embarrassment from a faux pas less of weighty on the ego, however, you could still miss out if you don’t know when to make the right move.

In short, most games expect the Double Down to be executed immediately after being dealt their second card. If you accidentally hit, you’ll miss your chance and that would really be a shame.

History

The question of when to double down in Blackjack is one that was answered back in the 1950’s when Magician John Scarne took the time to work out the mathematics behind the King of Casino games, Blackjack. His work, published in a book ‘Scarne’s New Complete Guide to Gambling’ described the odds and various plays to be able to make the best possible calls.

The amazing thing about his work is that it still stands true today, with the mathematics and odds transcending time and permeating every Blackjack table in the world.

Today there are many Blackjack Double Down charts that simplify the learning process so that committed players can memorise the best plays.

The Strategies

Rules Of Blackjack

When to double in blackjack is one of the most asked questions about the game. The best advice originates mainly from John Scarne’s work and has been published and republished in various forms. However, a problem arises whenever that advice is shortened or misquoted.

For example, if the player has drawn 11, they should Double Down, or so the rule says. In reality, there are factors that can influence the probability of this being a successful strategy.

The main one being what cards are left in the deck. Now this question is mainly one reserved for card counters who are able to discern whether the remaining deck is negative heavy, i.e. full of low cards, or not.

In this case, Doubling Down could be risky, especially if the dealer is showing a 10 or higher.

In contrast, where the remaining deck is positive, the player can be assured of more 10’s and above in the pack and has the option to play more hands that could result in a 20 or 21.

For those without that card counting knowhow, it’s usually a good strategy to stick to Doubling Down whenever you have an 11.

What are Hard and Soft Hands then?

Terminology is important, so get it right. Hard Hands don’t normally have and Ace unless it is being used as a 1. Soft Hands, conversely will have an Ace being used as either 11 or 1. With this tid-bit of knowledge under our belt, let’s move on…

What to do with a Soft Hand

This primarily depends on what the dealer’s hand is showing. Using the Rule of 9 can offer some guidance. This is where the Player has drawn an Ace and any card from 2 to 7. Where the player’s ‘number’ card and the dealer’s up-card sum up to 9 or more, the player should Double Down.

Two important exceptions to this rule should be heeded. The first is where the dealer’s up-card shows an Ace, the obvious reason being its ability to be played as its lower denomination.

The second is to never Double Down in Blackjack when the deal’s up-card is a 7 or above, again, the odds are not with you. So don’t do it!

Light work for Hard Hands

There are so many opportunities to Double Down it can feel like you can do it any time, but the reality is that you should choose your moment wisely.

When you have a hard 11, always Double Down, it’s too good to miss. You can also take a fairly good risk with a hard total of 10, but don’t ever try it when the dealer has a 10 or an Ace.

To Split or not To Split?

Many casinos allow a player to Double Down after they have split their hand. Here the rule is simple, where you have a pair of 5’s don’t touch them.

Treat them like any other 10 and if the dealer’s hand is 9 or less, you would be wise to double down. Any other cards and splitting may be a sensible option.

What the Dealer’s Hand Reveals

The dealer’s hand is key to knowing how to play your own hand, and thankfully there are some statistics on the bust rates for a dealer’s cards.

For example, a Deuce or Three have just under 40% chance of seeing the dealer go bust. Whilst a 4; 5 or 6 raise that probability to just over 40%.

Meanwhile a 7; 8; 9 or 10 only have a roughly 23% chance of working in the player’s favour whilst the Ace gives a dismally low 17% chance of seeing the dealer fail.

These figures can give hope to a player, especially when they know they also have a favourable hand, and underlines the premise of being fore warned is being fore armed!

Double Down – Down

There are unfortunately occasions where a player is unable to Double Down, despite all the signs that it is a good move to make. One may be the house rules as we mentioned before.

One piece of advice from the experts is that whenever you find yourself with a soft hand, i.e. a hand with an Ace, then it is usually more prudent to hit rather than go for the Double Down.

The Hard 9

We’ve already mentioned the propensity for some players to find themselves with a 9 and to jump down the Double Down hole if the dealer has anything other than a 10.

This is flawed thinking. This idea comes from a very valid play in games where you draw a Hard 9.

The important thing to remember is that this has to be in conjunction with when the dealer draws anything lower than a 7, excluding the Ace.

How Much to Bet?

Ultimately, this is a question reserved for the player, but there are two important rules that may help.

The first is never, and this cannot be stressed enough, NEVER Double Down with an additional bet of less than 100%. The whole aim of the play is to maximise on the odds that sit in your favour, so to bet anything less than the maximum allowed is a waste.

Secondly, if the prospect of doubling your bet at a table makes you sweat, even though you know the mathematics is on your side, then you should probably be at a table with lower stakes!

Blackjack Tips

Some Rules of Thumb

It’s usually a good idea to Double Down when:

• The player has drawn 11
• The player has 10 and the dealer has 4; 5; 6
• The player has 9 and the dealer has 5 or 6
• Player has an Ace and any card from 2 to 7 when the Player’s non-Ace and the dealer’s card add-up to 9 or more
• Dealer has a soft 17
• Also, remember that if you have a pair of 5’s; you should not be tempted to split them, it’s better to consider them as a 10

Top Three Plays

Out of all the pieces of advice, there are probably three plays which give the player the best advantage against the dealer.

The first of those is the Hard 9 which we’ve already mentioned. This is an excellent play with a very good chance of success.

The second is a similar Hard 10 or 11. Again these should be used against a lower draw from the dealer. As long as the hand is not made up with an Ace and the dealer’s hand is lower than yours, Doubling Down is a good move to make.

The third of our Top Three is a Soft 16 to 18. As with the previous two hands we’re looking for the dealer to have a low draw. As long as they have anything from 2 to 6 then Doubling Down is going to position the player favourably against the dealer.

Word to the Wise

Doubling Down can seem like an unnecessary risk, and it is true that doing it can make or break your time at the table. However, the strategies and rules for identifying the best times to Double Down are tried and tested.

While you may stand to lose more money on each individual attempt, in the long term, Doubling Down is a sensible strategy as the rewards will more than make up for time you take to practice the techniques above.

Just remember to know the Double Down rules of the casino you’re in as they are likely to place some restrictions on which of the techniques you can use.

This way you can pick the casino with the most favorable rules, and have more opportunity to see and make those Double Down plays.