Blackjack Strategy for Splitting 9s—Part III

Yesterday I discussed splitting a pair of 9s and how your blackjack strategy should go. Despite the hand total on a pair of 9s being 18, this is still a pair that you will want to split. When faced with a dealer’s up card of 2 through 6 or an 8 was covered yesterday. In those cases you split because the dealer can beat your 18 with three of the five hand totals he could hit to.

See that last line? The reason behind why you are splitting a pair of 9s against those dealer up cards? That is one of the points behind blackjack strategy. It is all well and fine to memorize and then automatically turn out the best play. But understanding why you are making that play is key to mastering your blackjack strategy, and allowing for further blackjack strategy finesses, such as card counting.

Now when you are facing a dealer’s up card of 9 I could simply tell you that you split your pair of 9s there too and be done with it. But since you are interested in mastering your blackjack strategy I am going to tell you why you are splitting those 9s.

Yes, you split a pair of 9s against a dealer’s 9 to improve your standing in that round, but it is just a little harder since the dealer has a 9 too. And there are a few cards that can help you, depending on house rules of course.

If you are dealt a 10 or Ace on one of your split 9s you just bettered your original hand to have a 19 or 20. So you can increase your chances of winning there. And you have a five out of thirteen shot of being dealt one of those cards.

You also have a one in thirteen chance of being dealt a 2, which would give you a hand total of 11. And you of course know that with an 11 your next move in blackjack strategy is to double down.

Finally if you are dealt another 9 you can split again if the house rules allow you to do so. And if they do not you are no worse off than you were when you started. So being dealt a 9 is another one out of thirteen.

So off all the cards that improve your hand or cause your hand total to break even there are seven out of thirteen chances. That leaves six cards that could potentially worsen your hand. But notice that by splitting you have a slight edge in doing so: seven cards can improve your hand while 6 will worsen it.

Now you can see why you need to split a pair of 9s when facing down a dealer’s 9—you have a slight edge in improving your hand. And either improving your hand or minimalizing your losses is desired end result of blackjack strategy.