Math Blackjack

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Math isn’t something that most gamblers want to think about when they’re gambling, but it can help in so many ways. Blackjack is a casino game that shows exactly how much knowing a little bit of math can improve results.

In fact, if you embrace the arithmetic behind the game, you can actually win more than you lose when you play blackjack.

The MIT Blackjack Team was a group of students and ex-students from the Massachusetts Institute of Technology, Harvard University, and other leading colleges who used card counting techniques and more sophisticated strategies to beat casinos at blackjack worldwide.

Here are seven mathematical facts that every blackjack player needs to know.

  1. Blackjack: the math behind the cards 2 and Ace cards worth 1 or 11 points used at the player’s discretion. The objective of the game is receiving cards with a total.
  2. Blackjackor Twenty-one(seen the movie 21?) is the most popular casino game and the most researched one. There are plenty of books dedicated to the so-called mathematics of blackjack. There is worthiness in a few of such books or eBooks. For the most part, however, there isn't much mathematics in all those blackjack studies.
  3. Fortunately all areas of blackjack math are pretty much done for you in a program called CVCX by QFIT. All you have to do is plug in your bet size, bankroll and game conditions and it will spit out your EV, VAR, SD, N0, CE and even the optimal bet spread.

1 – Odds Based on a Specific Set of Cards

The best thing about playing blackjack for real money is that everything that happens when you play is controlled by a specific set of cards. Most blackjack players don’t think about the game this way, but there are only 52 cards in a deck.

Even if the game is using six or eight decks of cards, there are still only 52 possible cards. And the base game of blackjack really only uses 13 sets of cards. This is because the jack of diamonds and jack of spades are the same. And because there are 13 ranks of cards, there are only 13 sets of cards that matter, no matter how many decks are being used.

This might not seem like it matters much, but once you understand why this is important and how you can use it, it helps you make smart decisions at the blackjack table.

If you have a hard 16 and the dealer is showing a six, do you know what the correct play is? You’re going to learn more about strategy cards in a different section. But if you don’t have a strategy card, you can get a good idea of the correct play using the fact that there are only 13 possible card ranks in the deck.

If you hit and get any card of six through king, you bust. If you bust, it doesn’t matter what happens to the dealer hand. This means that eight cards will make you bust, and only five help your hand.

You also know that the dealer has one of the 13 cards as his or her face down card. If the dealer has a 10 through king, they have a hard 16 and have the same chance to bust as you. You also know that if they have a six through nine, they have to hit and have a decent chance to bust. This means that eight out of 13 cards are bad for the dealer.

Math Blackjack

If these are the only things you know, it’s clear that the best play is to stand. This is why a specific set of cards is valuable to you when you play blackjack. You can use this information every time you play.

2 – Splitting Eights

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Now, you can see some specific ways to use the information you learned about in the first section. Consider your hand if you start with a pair of eights.

If you had to play a pair of eights as a hard hand, you would start with a hard 16. A hard 16 is the worst hand you can have, but luckily in this case, you have the opportunity to split the pair.

You have to place another wager, but it’s worth it to avoid starting with a hard 16. You receive another card on each of your eights.

Here’s a list of cards that help you a great deal on an eight. A two, three, nine, 10, jack, queen, king, and ace all put you in a good spot. This is eight out of 13 cards. Even a four through seven is better than a hard 16. This means that, by splitting, you can’t possibly be in a worse spot than playing it as a hard hand.

If you get another eight, you can split again.

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3 – Splitting Aces

When you start with a pair of aces, you have either two or 12. Neither of these is a good starting total. But when you split aces, you have an opportunity to improve by a large amount.

Any of the cards 10 through king give you a total of 21. A six through nine all give you a soft 17 or better. The only cards that don’t help you much are two through five, and you still have a soft hand with each of these. You still have a chance to win. This is another situation where eight out of the 13 possibilities improve your hand quite a bit.

You can see how the mathematics of blackjack help you improve your chances to win by the examples in these first three sections.

4 – Doubling Down

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The usefulness of mathematics in blackjack doesn’t stop with the examples above. It’s also useful in situations where you need to determine how to get more money in play when you have a good chance to win.

When you have a hard 11, 10, or nine, it’s often more profitable to double down than to hit. When you double down, you get twice as much money in play on the hand, and you receive one more card to complete your hand.

With an 11, you should double down every time except when the dealer has an ace showing. With a hard 10, doubling down is the most profitable play except when the dealer has an ace or 10 point card showing. And with a nine, you should double down when the dealer shows a three through six.

A few soft hands also are more profitable to double down with, and you can learn more about these hands by using a strategy card. You can learn more about strategy cards in the next section.

5 – Casino Strategy Cards

Now that you see how valuable it is to use math when gambling, you might be wondering if you need to do all of the math yourself. I’m going to put your mind at ease. Someone else has already done all the blackjack math for you and put it in an easy-to-use strategy card.

You can get a strategy card and use it every time you play blackjack. The card has all of the best possible plays, so you simply follow the card on every hand. It covers hard hands, pairs, and soft hands.

6 – Counting Cards

Even if you use a strategy card, you still are fighting a house edge. This means that you’re losing money playing blackjack, even though you’re playing with a small house edge.

But you can use math to help you turn this around and get a small edge against the casino. The way to do this is to use card counting.

Card counting may seem complicated at first, but it’s just a way to use math to play with an edge. You keep track of high and low cards that are played, then make larger wagers when you have an edge.

If you play blackjack, you should learn more about counting cards. It’s not as hard as you probably think, and once you learn how to use proper card counting systems, you can benefit every time you play.

7 – Sizing Your Bets

Math

Math is also helpful when it comes to figuring out how much you need to bet when you play blackjack. And it’s actually pretty simple to figure this out.

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When you play blackjack and the casino has an edge, you need to bet the lowest amount possible. This means that every time you play blackjack and aren’t counting cards, you need to make the table’s minimum wager.

Even when you’re using a strategy card, the casino has an edge. It isn’t a big edge, but it’s still an edge. This means that the bigger your bets are, the more you lose.

When you learn about card counting, you learn when you have an edge. When you have an edge, you bet more. This is the only time that you should ever bet more than the table minimum.

Depending on the size of your bankroll, you should bet as much as possible when you have an edge. In real life, it’s hard to always bet the least and the most possible depending on the situation. But you’re going to learn how to do this as you learn more about counting cards.

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Conclusion

The power of blackjack math starts with the 13 ranks of cards in the deck. Once you understand how you can use this knowledge, your results are going to improve right away.

Use the math behind a blackjack strategy card to get started, then learn how to count cards. If you practice long enough, you can learn how to get an edge every time you play.