4/11/2022

Double Deck Blackjack Basic Strategy

Double Down Strategy for Blackjack Another advanced blackjack strategy is the double down, which gives you a chance to double your wager and potential winnings after the initial deal. The idea is for you to lay an additional wager, but you can only get one more dealt card. Every basic strategy card will advise you to double an 11 unless the dealer is holding an Ace. If the dealer holds an Ace, there is a greater chance of them winning or a push being declared. Always double hard 9 when the dealer’s up card is between 2 and 6. Soft 16, 17, or 18 should also be doubled when the dealer’s up card is 2-6.

  • Appendices
  • Miscellaneous
  • External Links

On This Page

Introduction

To use the basic strategy, look up your hand along the left vertical edge and the dealer's up card along the top. In both cases an A stands for ace. From top to bottom are the hard totals, soft totals, and splittable hands. There are two charts depending on whether the dealer hits or stands on soft 17.

Other basic strategy rules.

  • Never take insurance or 'even money.'
  • If there is no row for splitting (fives and tens), then look up your hand as a hard total (10 or 20).
  • If you can't split because of a limit on re-splitting, then look up your hand as a hard total, except aces. In the extremely unlikely event you have a pair of aces you can't re-split and drawing to split aces is allowed, then double against a 5 or 6, otherwise hit.

Ideally, the basic strategy shows the play which, on average, will result in the greatest win or the least loss per initial hand played. The way I usually go about this is to look at the initial 2-card hands only. Generally, this will result in the overall best play. However, soft 18 against a dealer ace when the dealer stands on soft 17 provides the only known exception that I am aware of for any number of decks. As my blackjack appendix 9 shows, a 2-card soft 18 vs A has an expected value of hitting of -0.100359, and of standing -0.100502. So with two cards it is very slightly better to hit. However, not all soft 18's are composed of two cards. The more the cards in the player's hand the more the odds favor standing. Simulations show that if forced to always hit or always stand, it is better to stand. I would like to thank Don Schlesinger for bringing this unusual play to my attention.


Written by:Michael Shackleford
Lyza Hayn

Table Of Contents

We all know that Blackjack is one of the most popular table games out there.

But have you tried out the single deck version?

If you want to play with the best chances the game offers, you'll need a simple single deck Blackjack strategy and a few tips.

Blackjack double deck basic strategy card
  • Single deck Blackjack games have the lowest house edge of all games
  • The low house edge gives players multiple advantages over the classic multi deck game

Before you jump in, you'll need to learn key strategical points and differences between playing single deck Blackjack and standard multi-deck.

Single vs Multiple Deck Blackjack

Back in the good old days, single deck Blackjack was the standard.

It was played widely around the world, with blissful players taking advantage of the 0.15% house edge.

It became popular with card counters, who swooped in with their own single deck Blackjack strategy to take a piece of the pie. The use of one deck makes card counting easy, but Casinos caught on quickly.

They began introducing Blackjack games with a double deck or more decks to raise their own edge and make it harder to count cards.

So, what are the differences between these types of Blackjack? Besides the number of decks, the payout is generally different as well—you'll find that many Casinos offer payouts of 6:5 in single-deck games, while multi-deck games generally pay 3:2.

Rules & Gameplay for Single Deck Play

The basic concept and objective remain the same in single deck Blackjack. You want to get to 21 points or as close to 21 as possible without busting.

You'll place your bet, then the dealer will deal the hands. You'll get two face-up cards, and the dealer will get one face-up and one face-down.

You'll study your cards and the dealer's upcard, then decide to hit, stand, split, or double down.

Remember, both land-based and online casinos usually have specific rules for single-deck Blackjack which differ from multi-deck. These include:

Double Deck Blackjack Basic Strategy

  • Whether or not the dealer hits or stands on soft 17
  • Whether or not players may double down after a split
  • If and when players can surrender

It's common to have the dealer hit on a soft 17, to prohibit players from doubling down after a split, and to prohibit surrender because these rules increase the house edge.

However, these and other rules will vary depending on the online Casino site of your choice

Tips & Single Deck Blackjack Strategy Guide

It's imperative you learn how to make a decision as a player and follow the basics of single deck Blackjack strategy as you play.

Remember that every single card which is played in the single-deck game has an appreciable impact on the distribution of the remaining cards in the deck, more so than multi-deck games.

Always use this to your advantage and pay attention to the cards being played.

It's also a good idea to consult some Blackjack basic strategy charts to figure out the optimal play for your hand.

Our Blackjack cheat sheets display possible hands in conjunction with possible dealer upcards, telling whether you should split, double down, stand, or hit for that specific combination of cards.

Optimal Plays

Assuming that the dealer hits on soft 17, doubling down after a split is not allowed, and surrender is not allowed, you can follow these guidelines:
Hard Hands

  • 5-7: Always hit
  • 8: Double if dealer shows 5 or 6, otherwise hit
  • 9: Double if dealer shows 2-6, otherwise hit
  • 10: Double if dealer shows 2-9, otherwise hit
  • 11: Always double
  • 12: Stand if dealer shows 4-6, otherwise hit
  • 13: Stand if dealer shows 2-6, otherwise hit
  • 14: Stand if dealer shows 2-6, otherwise hit
  • 15: Stand if dealer shows 2-6, hit on 7-ace
  • 16: Stand if dealer shows 2-6, hit on 7-ace
  • 17-21: Always stand

Soft Hands

  • A-2: Double if dealer shows 4-6, otherwise hit
  • A-3: Double if dealer shows 4-6, otherwise hit
  • A-4: Double if dealer shows 4-6, otherwise hit
  • A-5: Double if dealer shows 4-6, otherwise hit
  • A-6: Double if dealer shows 2-6, otherwise hit
  • A-7: Double if dealer shows 3-6, stand on 2,7, & 8, hit on 9, 10 & ace
  • A-8: Double if dealer shows 6, otherwise stand
  • A-9: Always stand
  • A-10: Always stand

Pairs:

  • 2-2: Split if dealer shows 3-7, otherwise hit
  • 3-3: Split if dealer shows 4-7, otherwise hit
  • 4-4: Split if dealer shows 4-6, otherwise hit
  • 5-5: Double if dealer shows 2-9, hit on 10 & ace
  • 6-6: Split if dealer shows 2-7, otherwise hit
  • 7-7: Split if dealer shows 2-7, stand on 10, hit on 8, 9 & ace
  • 8-8: Always split
  • 9-9: Split if dealer shows 2-6 and 8-9, otherwise stand
  • 10-10: Always stand
  • Ace-Ace: Always split

Keep in mind that this is not an optimal strategy for every game, because you won't just make different plays according to the dealer's upcard; single deck basic strategy play Blackjack is also dependent on the house rules.

House Rule Variations

Double deck blackjack basic strategy examples

If the dealer stands on soft 17, you know that he has no chance of improving this hand. Keep this in mind as you make your decisions, because it actually increases your odds of beating him with certain plays.

Double

Double down rules will affect your bets, so pay close attention to them.

If you can double down after a split, you'll want to be a bit more aggressive with your splits than the guide displays—for example, you could split a pair of 3s if the dealer shows 2 or 3, not just 4 through 6.

Likewise, if you can surrender, you'll want to do so strategically. For example, if you have a pair of sevens and the dealer shows 10, you know your odds aren't good, so surrendering would be the best option.

Double Deck Blackjack Basic Strategy Chart

Tips for the Table

When you're at the table, keep these tips for Blackjack basic strategy in mind:

  • Use your knowledge of the cards which have been played to infer which cards may come up. Remember, this knowledge comes easier when you play with a single deck.
  • Never take insurance or even money, because the house edge on insurance is 5.9% in single-deck Blackjack
  • Use a responsible betting strategy, making wagers which fit with your bankroll and allow you to bet for longer. Remember, it's all about having fun.

Double Deck Blackjack Basic Strategy Games Pc

Now that you know about single deck Blackjack strategy, it's time to try a hand at the tables with this action-packed game.

Blackjack Double Deck Basic Strategy Card

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