Always Split 8s In Blackjack
- Why Always Split 8s In Blackjack
- Do You Always Split 8s In Blackjack
- Why Should You Always Split 8's In Blackjack
If you play Blackjack online, you should always split 8s and Aces. However, if you play the game at a brick-and-mortar casino and you know how to count cards, then you can deviate from the optimal strategy. There is one situation in which you can hit on a pair of Aces instead of splitting them. The average hand in blackjack is 17.5. If you split the eights and hit a face card, a 10, or an ace, you’re beating the average. Don’t split nines because it’s a stronger hand (18). ALWAYS SPLIT ACES AND EIGHTS! I always split eights. But in a high count there must be a point where surrender or stand is a better option, especially if the dealer has a nine or ten. I can't find a list of ALL options beyond the I18, and in fact they're so rare that I probably won't try to learn them.
If you’re new to blackjack, you might not understand that to get the best odds, you must play with the appropriate strategy. You should probably memorize a basic strategy chart, and if you can’t do that, buy one at the casino gift shop and refer to it at the table.
Even that might be too much work for some people, so I’m happy to offer some blackjack rules of thumb to help you do well even if you haven’t mastered basic strategy.
1- Never Take Insurance – It’s a Sucker Bet
It’s safe to assume that you’re not a card counter. If you were, you wouldn’t have any use for these rules of thumb. Card counters know when to take insurance and when not to – based on the count.
Why Always Split 8s In Blackjack
If you’re not counting cards, you should never take insurance. The odds offered on that bet are terrible.
It’s a side bet you can make when the dealer has an ace for her up-card. The size of the bet must be half of your original bet, and it pays off at 2 to 1 if the dealer has a blackjack.
Doing this hedges your original bet, which you lose when the dealer has a blackjack. You break even when the dealer has a blackjack.
If the dealer doesn’t have a blackjack, you lose your insurance bet, but the rest of the hand plays out normally.
If you had 2 to 1 or better odds of winning the insurance bet, it would make sense to take this bet.
But you don’t.
A standard deck of playing cards has 16 cards valued at 10, so the odds of getting a 10 for your next card are 35 to 16.
They’d need to be 32 to 16 (or 2 to 1) for this bet to not have an edge for the house.
2- Always Stand If You Have a Hard 17 or More and Always Hit If You Have a Hard 11 or Less
When you have a blackjack hand that includes an ace, that ace can count as 1 or 11. This is, by definition, a soft hand. You play soft hands more aggressively – hitting more often – than hard hands.
If you have a hand that would bust if the ace were counted as 11, you must count it as 1, and you now have a hard hand.
Any hand lacking aces is also a hard hand.
With a hard total of 17 or higher, your probability of busting is so high that you should never take a hit.
You’ll also always hit a hard 11 or less, because it’s impossible to bust with that total. The highest value card in the deck is the ace, which would give you a total of 22 if you had a hard 11, but you can also count that ace as 1 – giving you a total of 12.
The next highest card is 10, which gives you a 21.
Every possible card improves your hand with a hard total of 11.
3- Always Stand With a Soft 19 or Higher, and Always Hit a Soft 17 or Lower
A soft total of 19 is so good that even though it’s a soft total, you probably won’t improve the hand by getting another card. An ace or a 2 will give you a 20 or 21, but any other card you get only gets you the same total or lower.
On the other hand, a soft 17 isn’t that impressive a total, so you might as well hit it and try to improve it. The worst-case scenario is that you wind up with a slightly lower total, but that’s not as likely as improving your total or having the same total.
With a soft total of 18, you have a decision to make, but it’s an easy one:
- If the dealer has a 9, 10, or ace showing, you’ll hit. Otherwise, stand.
- That’s your entire basic strategy for soft totals in less than 200 words.
Show me another blackjack strategy guide that keeps it that simple.
4- If the Dealer Has a 6 or Lower as Her Up-Card, She’s Liable to Bust
When the dealer has a 6, 5, 4, 3, or 2 showing as her up-card, she’s more likely to bust her hand than usual. This means you’re more likely to stand, because if she busts, you only need to stay in the game.
If you have a hard 13, 14, 15, or 16, you’ll stand when the dealer has a 6 or lower showing.
And, of course, you always stand on a hard 17 or higher, so you’ll stand on almost every total when the dealer has a 6 or lower showing.
Your goal is to still be in the hand when the dealer busts.
Keep in mind that the dealer busting isn’t inevitable; it’s just likely.
Don’t get made when you lose real money playing blackjack. It’s a random game, and that’s going to happen sometimes.
5- Always Split Aces and 8s but Never Split 4s, 5s, or 10s
Splitting means using the 2 cards you’ve been dealt to start 2 hands. You need to place an extra bet to get the extra hand into action. Also, the 2 cards you have must be the same.
Splitting aces should make obvious sense – who wouldn’t want to have a blackjack hand where the first card is an ace?
Splitting 8s might not be as obvious, but think about it this way:
- What’s the Most Common Card in the Deck? It’s a card worth 10, which means that the most common result you’ll see after splitting 8s is a total of 18, which is a solid hand anyone at the blackjack table is happy to see.
- Why Would You Never Split 4s, 5s, or 10s? If you have a couple of 4s, you have a hard total of 8. If you hit and get a 10, you have a total of 18, which is great.
But if you split the 4s, you’re likely to get a 10 and wind up with a hard total of 14, which isn’t nearly as exciting.
The same logic applies to 5s. Would you rather start with a total of 10, where you’re liable to wind up with a total of 20? Or would you rather have a hand starting with a 5 that’s liable to turn into a 15?
And if you have a pair of 10s, you have the 2nd best total in the game – 20.
Why would you want to screw that up?
6- For Other Pairs, Split If the Cards Are the Same as the Dealer or Lower
For Example: If you have a pair of 7s, you would split if the dealer has a 7 or lower showing for her up-card.
If you have a pair of 6s, you would split if the dealer has a 6 or lower showing.
This goes back to the logic that if the dealer has a low card showing, she’s more likely to bust. If she’s likely to bust, you want to get more money into action.
With a pair of 9s, you’d split against a 9 or less for a slightly different reason:
You have a total of 18, but the dealer is likely to have a 19, which means your 18 will lose.
And since the 10 comes out more often, when you split those 9s, you’ll often wind up with a total of 19 on the 2 subsequent hands – which will at least push.
If the dealer has something much lower than that, she’s likely to bust, so again, you just want to get more money into action.
Do You Always Split 8s In Blackjack
7- Always Double Down on a 10 or 11, Unless the Dealer Has a 10 or an Ace
Doubling down is taking one more card and doubling the size of your bet at the same time. You cannot take additional cards after doubling down.
If you have a 10, you double down unless the dealer has a 10 or an ace.
If you have an 11, you double down unless the dealer has an ace.
You’ll also double down with a 9 if the dealer has a 6 or lower.
You’ll sometimes double down with soft totals, but these are meant to be rules of thumb, not a complete guide to basic strategy, so I won’t get into that.
Conclusion
These 7 blackjack rules of thumb cover most hands and situations you’ll see at the blackjack table. This isn’t meant to replace basic strategy at all – I still think you should memorize basic blackjack strategy and make the right play on every hand.
The average blackjack player in Vegas makes so many mistakes that the house edge might as well be 4% or 5%. If you stick to playing by the rules of thumbs above, you’ll only be dealing with a house edge of 1.5% or so.
That’s far better than 5%.
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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.
Why Should You Always Split 8's In Blackjack
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.)
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.
Conclusion
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.
Both are the mathematically correct play.