Why Do You Always Split 8s In Blackjack
Even players with little or no knowledge of basic strategy in blackjack understand one thing:
You always split aces and 8s in blackjack.
Of course, you can always find contrarians who disagree with everything, no matter how solid the math behind it is. This post is for people who want to understand in detail why you should always split aces and 8s in blackjack.
This is good advice because a pair of eights equals 16—the worst total a player can have at the blackjack table. Whenever you split a pair of eights each eight receives a new card and becomes a separate hand. You can then act on that hand according to the rules of blackjack by hitting, standing, or doubling down. Splitting 8s is very much a move that basic strategy players swear. This is because two hands starting with an 8 each isn’t nearly so bad a start to a new blackjack round as a hard total of 16. Many could argue that splitting is bad because it means the player must put another bet of the same value on the table.
A Pair of Aces in Blackjack Is a Soft Total of 12
I don’t know a single blackjack player who gets excited about having a hard or soft total of 12. It’s a hand that’s going to bust a lot of the time when you hit it, because there are at least 16 cards worth 10 points in the deck. (That’s almost 1/3 of the cards in the deck.)
Dec 15, 2017 And that’s my explanation of why you should always split aces and 8s when playing blackjack. The dealer’s upcard doesn’t matter in any situation. You’ll either win more money more often or lose less money in the long run. Splitting aces is an aggressive move that increases your winnings dramatically. Why You Should Never Split 10’s in Blackjack. When you are playing blackjack games in a land based casino or online via a multiplayer or live dealer gaming platform, you are going to end up sitting next to players who are both experienced and inexperienced, and their level of experience will soon become apparent when you take a look at how they are playing off each hand dealt out to them.
On the other hand, if the 1st card of a hand is worth 11 points, you stand a good chance (1/3 again) of winding up with a total of 21. Even if the game doesn’t pay off at 3 to 2 for blackjack after splitting, that’s still an excellent hand that the dealer probably won’t beat. The best the dealer can do is push.
The thing about splitting, though, is that you must put up another bet. Low rollers who are under-bankrolled sometimes don’t like this. They don’t WANT to risk additional money on a single hand, even if that hand becomes 2 new hands.
They’re making a mistake, and a big one. Not splitting aces does serious damage to the house edge for the game.
In fact, the house is so convinced of how strong a play this is that they have strict rules about what you can do after splitting. For example, you’re not allowed to take more than one additional card after splitting aces. And no one understands the math behind these casino games than the casinos themselves, trust me.
Casinos also usually restrict you from doubling down after splitting. You usually can’t resplit aces if you get another ace again, either.
None of those minor rules variations, matter, though. It’s still always the correct strategy to split a pair of aces at the blackjack table.
A Pair of 8s in Blackjack Is a Hard Total of 16
If you think blackjack players are unenthusiastic about a total of 12, watch them shift uncomfortably in their chairs when they have a hard total of 16. There’s no good way to play a hard total of 16. If you stand, the dealer will probably beat you with a higher total. If you hit, you’ll probably bust.
But when you have a pair of 8s, you get to start 2 new hands, both of which have an 8 as their starting hand. 1/3 of the time, you’ll get a 10, which will make your new total a hard 18, which is a respectable hand for any blackjack player in almost any situation.
Also, even if you don’t get a 10, you might get an ace, which gives you a total of 19—which is, of course, even better than a total of 18.
Even if you get a 9, your hand improves to a 17, which is respectable, if not ideal.
Most casinos don’t have the same restrictions that apply to your “after-splitting” hands, too.
When Do You Deviate from Basic Strategy When It Comes to Splitting Aces and 8s
If you’re not counting cards, you NEVER deviate from basic strategy when it comes to splitting aces and 8s. Most of the time, even if you ARE counting cards, you still always split aces and 8s.
But there are exceptions if you’re counting cards.
If your count is negative and the dealer has an 8, 9, or 10 showing, you just hit the aces instead of splitting them.
Why is this?
When the count is negative, it means that there aren’t as many 10s left in the deck. Part of what gives splitting aces its kick is the possibility of getting that total of 21.
You run the risk of turning a single likely loser into 2 likely losers with twice as much money in action.
If the count is positive, you will sometimes not split a pair of 9s. If the dealer has a 9 or 10 showing in this situation, he’s more likely to have a 10 in the hole. (That’s what the positive count means, after all.) This means you’re probably facing a 19 or 20.
When you split those 8s, yes, you’ll probably get a couple of hands that total 18.
But that does you little good against a 19 or 20.
And remember—those are only correct decisions if you’re counting cards and know what you’re doing.
An Argument against Splitting Aces in Certain Situations
Suppose the dealer is showing a 10, and you have 2 aces.
Most people assume that the dealer’s down card is also a 10, so you’re probably facing a dealer total of 20.
If you split those aces, the only way to win both those hands is by getting a 10 in each of them. The probability of that is less than 1/3 for each, or about 1/9 for both of them.
What this argument misses is that a soft total of 12 is no fun to play in that situation, either. Sure, you don’t have to invest extra money to get those extra cards, but the trade-off just plain isn’t worth it.
Conclusion
When it comes to blackjack, you should always follow basic strategy—except when you shouldn’t.
Of course, the only time you shouldn’t is when you’re counting cards. In rare cases when you’re counting, you’ll deviate from basic strategy.
And one of the 1st rules of basic strategy is that you ALWAYS split aces and 8s.
That’s an easy one to remember.
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If you’ve spent any time studying blackjack basic strategy, you’ve probably heard that you should always split aces and eights. The goal of this post is to explain why this is the appropriate move in almost any variation of blackjack. It doesn’t matter what the dealer’s face-up card is, by the way. Splitting aces and eights is always the right move.
A Note on “Basic Strategy”
If you’re new to blackjack, you might not have heard what basic strategy is. In brief, it’s a table of the mathematically correct moves to make in any blackjack situation.
You have 2 pieces of information, which are cross-referenced on a blackjack basic strategy chart:
- What’s in your hand
- Half of what’s in the dealer’s hand
In your hand, you have a soft total, a hard total, and possibly a pair of cards of the same rank.
In the dealer’s hand, you know one of his or her cards. In almost all blackjack variations, the dealer gets one card face-up.
The correct decision in any of these situations is the one with the highest mathematical expected return.
If you make the correct mathematical decision on every hand, you reduce the house edge that the casino has over you to its lowest possible number—usually between 0.5% and 1%, depending on the rules at the casino.
How Splitting Cards in Blackjack Works
One of the options you have in blackjack is “splitting” a pair of cards of the same rank. When you do this, you start 2 hands. The first card of each of those hands is one of the 2 cards from your original hand.
You also must put up another bet when you split your hand. You then play each hand independently of each other.
You could win both the new hands, lost both the new hands, or lose with one and win with the other.
Basic strategy tells you that you should never splits 4s, 5s, or 10s. It also tells you that you should always split aces or 8s.
Why You Do the Things You Do in Basic Strategy
Basic strategy has been derived by mathematicians and computer programs who run simulations of millions of hands. They look at the results of those hands to determine the playing decision which wins the most or loses the least amount of money in each situation.
But some of the thinking behind basic strategy makes sense, too.
Here’s an example:
You should never split 10s, no matter what the dealer’s upcard is.
Why not?
You have a hard total of 20. The only possible hand that could beat that 20 is a 21. It’s such a good hand that it’s hard to imagine improving your chances by creating 2 new hands—even though any hand which starts with a single 10 is going to turn out pretty good.
Let’s think about how many cards left in the deck will improve on a hard total of 20.
If you get a 10 on your new hand, that’s great. You now have what you would have had originally. You have 14 cards left in the deck which are worth 10 points. (There are 16 of those cards to begin with, but you already have 2 of them.)
If you get an ace, that’s even better. You get 3 to 2 on your payout. That’s not as likely as getting another 10, though. There are only 4 aces in the deck.
All the other cards, though, give you a worse hand. That’s a total of 32 cards which will give you a hand that’s not as good as your original hand. That’s about a 65% chance of getting a hand with a total not as good as you started with.
And some of those cards are rough, too. You get a 2, 3, 4, 5, or 6, and you have a stiff hand. That’s a hand that’s unlikely to beat the dealer unless you hit it. But it’s also a hand that has a good chance of going bust if you hit it.
This kind of thinking—about how good your total is, and about how the remaining cards in the deck might affect that total—is crucial to an understanding of basic strategy.
Let’s look at one more example:
You should also never split 5s. That’s a hard total of 10.
That’s a lousy total as it stands, but it’s a total you can’t bust with an additional card. Any card will improve your total, and a lot of those cards will give you a hand you’ll feel good about standing on. You have 16 cards worth 10 left in the deck, and 4 aces. That’s 20 cards that will give you a total of 20 or 21.
If you get a 7, 8, or 9, you also have a solid total you can feel good about. That’s another 12 cards, for a total of 32 cards which will improve your total.
Even if you get a 2, 3, 4, 5, or 6, it’s not the end of the world. You’re liable to get a stiff hand, but it’s not as likely as getting a good hand.
But what would happen if you split those 5s?
You’d wind up with 2 hands with a starting card of 5. It’s impossible to get a card on top of that to make you feel good about your hand. If you get an ace, you have a soft 16, and that’s probably the best you can hope for. If you get a 10, you have a total of 15, which is awful. It won’t beat the dealer, and it’s likely to bust when you take another card.
The other, lower value cards don’t help much either. A 9 gives you a total of 14, which is also awful. An 8 gives you a total of 13. Nothing to write home about there, either.
What Happens When You Split Aces
A hand of 2 aces that you don’t split is just a soft total of 12. That’s not terrible, because it’s hard to bust. But it’s not likely to win.
On the other hand, if you take a mediocre hand and turn it into 2 really good hands, you’ve accomplished something.
And let’s face it—anyone with a brain in his or her head knows that an ace is the best possible starting card in blackjack. If you get a 10 on top of that ace, you have a blackjack, which pays off at 3 to 2.
In fact, in a lot of casinos, you can split those aces and then immediately double down on them.
Remember, you have 16 cards worth 10 points each in the deck—more than any other specific total. Most of the cards aren’t worth 10 points, but enough of them are that you can be optimistic about getting that natural at least some of the time.
But if you miss your 10, you still wind up with a good hand almost every time. If you get a 9, you have a total of 20, which is a great hand. If you get an 8, you have a total of 19, which is good. Even a 7 leaves you with a total of 18.
If you get a 6 or less, you don’t have such a great hand. But because one of the cards is an ace, you’re going to be able to try to improve that hand with little fear that it’s going to bust.
What Happens When You Split Eights
First, if you have a hand made up of 2 eights, you have a hard total of 16. That’s a lousy hand. You’re probably going to stand rather than take an additional card. Either way, you’re unlikely to win. If you stand, the dealer will probably wind up with a better total than you. If you hit, you’re probably going to bust.
On the other hand, if you split this into 2 new hands, each with a starting card of 8, a lot of good things can happen.
16 of the cards in the deck are worth 10 points, so you have a reasonably good chance of getting a total of 18 on your new hand.
If you get a 9, you have a total of 17, which is also a big improvement.
If get another 8, which is unlikely, since you already have 2 of them, you’re no worse off than you were to begin with.
But What If the Dealer Has a 9 or 10 Upcard?
Thoughtful blackjack players might wonder why you would split 10s or 8s in the face of a dealer’s upcard of 9 or 10. After all, the odds are good that the dealer will beat you. Aren’t you just losing twice as much money by splitting in this situation?
The crucial factor to keep in mind is whether you’ll win more in the long run or lose more in the long run by making a specific decision. In the case of a dealer 9 or 10, you’re not trying to win more often. You’re just trying to lose less often.
This is built into the logic of the game and into the logic of basic strategy.
Here’s an example:
Any total of 12, 13, 14, 15, 16, or 17 is probably going to lose to the dealer—more than 51% of the time, anyway. And you’ll see one of those totals a little more than twice out of every 5 hands.
The best you can do in that situation is try to lose less often than you would if you made another decision.
Let’s say you face a dealer upcard of 9, 10, or ace with a pair of 8s. If splitting weren’t an option, the correct strategy would be to hit the hard total of 16. You’d lose $52 out of every $100 you bet in this situation. (It seems like you’d lose more often than that, even, but remember—the dealer doesn’t always have an ace in the hole.)
Why Do You Always Split 8s In Blackjack
But if you split that into 2 hands that each start with an 8, you’ll lose $43 of every $100 you bet in this situation. Yes, you’ve put twice as much money into the situation. But each of those should be thought of as 2 bets with a better on-average outcome than the one bet with a terrible possible outcome.
These are both losing situations, but one situation saves you $9 on average per $100 bet.
In fact, you’ll sometimes get some grief from the other players or even the dealer when you make this decision. The best thing to do is ignore them. They mean well, but they clearly don’t understand the math behind the game or behind basic strategy.
As an aside, I used to employ a former blackjack dealer to clean my house. Her understanding of the game and the math behind it was abysmal. Don’t make the mistake of thinking that just because someone deals blackjack for a living means they understand how to minimize the house edge.
Always follow basic strategy, and always ignore other people who advise you to do something different.
Splitting Aces Is a No-Brainer, Though
Even people who are a little confused about basic strategy in blackjack understand the logic behind splitting aces. You’ll occasionally run into someone who’s too timid or too under-bankrolled to make the mathematically best choice. If you’re in a helpful mood, you might offer to cover the extra bet for that person at no risk to them. The dealer might or might not allow this. The player might or might not take you up on it.
But if he or she does, it’s a good deal, because you have an excellent chance of getting that 3 to 2 payout for a blackjack.
If you’re counting cards, you might even be in a situation where the deck is rich in 10s. In this case, such a play makes even more sense. That’s the reason card counting works, after all—it measures the ratio of 10s and aces in the deck to the number of lower cards in the deck.
Splitting and Re-Splitting Aces
It’s possible when you split aces to get another ace on top of one or both of your new hands. In that case, if the casino allows it, you should split again. You could easily wind up with 4 hands in play at a time, all of which stand an excellent chance of turning into a blackjack.
Not all casinos allow this, and it’s easy to see why. At many casinos, after you split aces, the casino only lets you take one additional card. If you were to get another ace and not have the option of re-splitting, the casino has you. A total of 12 versus almost any dealer total is a likely loser.
Luckily, that doesn’t come up often enough to worry about it. Just remember that you always split aces, regardless of the dealer’s upcard, and you’ll be fine.
Why Do You Always Split 8s In Blackjack Card Game
Conclusion
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And that’s my explanation of why you should always split aces and 8s when playing blackjack. The dealer’s upcard doesn’t matter in any situation. You’ll either win more money more often or lose less money in the long run.
Splitting aces is an aggressive move that increases your winnings dramatically. Splitting 8s is a defensive move that helps to minimize your long-term losses.
Do You Always Split 8's In Blackjack
Both are the mathematically correct play.