The first thing my dad ever told me the first time I went into a casino was ‘always split your aces and eights’. He was referring, of course, to the game of blackjack. And he was correct–there might be very rare exceptions to this axiom (I can’t think of any at the moment) but these notwithstanding you should always split your aces. If you have a pair of Aces or Eights: Always Split. If you have a pair of twos or threes: Split if the Dealer has 2 – 7, otherwise Hit. If you have a pair of fours: Split if the Dealer has 5 or 6 – otherwise Hit. If you have a pair of fives: Double if the Dealer has 2 to 9 – otherwise Hit.

People have been playing Blackjack since the middle of the 18th century.

It remains one of the most popular casino games, and for good reason. If you know what you’re doing, it’s possible to play Blackjack for a long time without losing too much and sometimes even coming out on top.

The beauty of the game is that there are only a limited number of blackjack wagers that you can make. It’s knowing when to make them that counts.

Read on to learn more.

The Basics

We are going to assume you know the basic rules of blackjack. If you don’t, you can find them here.

In normal play, some strategies make you statistically more likely to win. Firstly the most simple: if you have 17 or more, do not take another card. Regardless of what the dealer has, statistics show that if you take another card, you are far more likely to go bust than to turn over a four, three, two or ace, which are the only cards that can improve your hand.

At the opposite end of the scale, if you have a score between four and nine, you should always take another card, as no matter what card you turn over, you will still have less than 21, but will have improved your score.

Blackjack always split aces and eights full

There are tables that tell you exactly what you should do for every combination of your cards compared to the dealer’s face-up card. There are more than a hundred different combinations to learn, so you might need to use a learning technique such as concept mapping to help.

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Doubling Down

This is a great way to win more money if you have a strong hand.

You add another wager that is the same size as your original stake and are given one more card only. It means that if you win, you will win twice as much, but you also have twice as much to lose.

That’s why you should only use this technique in certain circumstances. The most common is when you have either 10 or 11. Statistically, the most likely number to get from a single card is 10, as turning over a ten, jack, queen, or king will give you this total.

Doubling down on a 10 or 11 means you are most likely to score 20 or 21, which will very often be winning scores.

Splitting Pairs

If you are dealt two of the same card, you can split these cards, and play them as two separate hands. As with doubling down, you will need to match your original wager as you’re now playing two sets of cards.

This gives you twice the chances of winning, but also comes with twice the risk, so you should only do this under certain circumstances. The key phrase to remember is Aces and Eights. These are the pairs that you should always split.

Splitting aces gives you a good chance of getting 21 on at least one hand. Since the dealer has to hit anything below 17, a pair of eights isn’t a great hand, but splitting them gives you a good chance of hitting 18 or better or one or both of them.

Related:Ultimate Poker Hosts the First Legal Online Poker Game in the U.S.

Ready to Try out Some of These Blackjack Wagers?

If you’re feeling ready to try out some of these blackjack wagers it’s important that you do so within your means.

Remember that the odds are stacked against you, so the likelihood is that you will lose money. Only gamble with an amount that you are willing to lose and can survive without. That way you’ll have a lot of fun and won’t leave yourself destitute.

For more tips and advice on a wide range of topics, check out the rest of our site.

CategoriesGambling and Casinos


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

Blackjack Always Split Aces And Eights Card Game

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.

Blackjack

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.

Splitting Aces And Eights

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.

Blackjack Always Split Aces And Eights Play

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 Split Aces And Eights

Blackjack Always Split Aces And Eights

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.

Aces And Eights Blackjack

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.