Dr. Thorp's Beat The Dealer Basic Blackjack Strategy |
Here's a little something I picked up a long time ago and thought you might find useful.
There was a book published some twenty years or more ago, called 'Beat The Dealer' by
a Dr. Thorp, who systematically played some 100 million blackjack hands using computers
(obviously). From his results, he published the following tables in his book which lay out the
proper basic strategies for playing blackjack hands. This is pure math now..
The table below shows Wizard of Odds's composition dependent exceptions to single-deck blackjack basic strategy, using Boss Media rules. Cryptologic and Microgaming composition dependent exceptions follow. Basic Strategy for Single Deck Blackjack: Dealer Stands on Soft 17 In the tables above, we have not provided separate rows for 5- and 10-pair hands as we have taken those hands as hard 10s and hard 20s and covered them in that corresponding table for hard hands. Basic Strategy for Blackjack Using 4 to 8 Decks. Single Deck Blackjack Strategy With a single deck, early surrender and all of these other rules allowed, the player would actually enjoy about a 1% advantage over the house when playing with perfect strategy. Of course, casinos never offer tables that favor the player or tell them how to win with blackjack strategy cards.
Of course be advised that I make no claim other than what what is stated here.
I don't even enjoy playing blackjack (I find craps and poker more fun and profitable)..
nor do I endorse gambling..please..it's all mathematics to me..
The top table is for single deck blackjack (harder to find but still present in Las Vegas
and Atlantic City) and the bottom table is for double deck blackjack (more common).
The legend for both tables is quite simple:
H = Hit | S = Stay | D = Double Down | P = Split |
Single Deck | Double Deck |
Keep in mind that these are the basic strategies. There are adjustments
that need to be made to these plays depending on the particular house
rule variations and upon the leanness or richness of certain card types
remaining in the deck (for those card counters out there).
Enjoy and good luck; if you ever make a ton of money using this,
send me a postcard from the casino!
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Table Of Contents
We all know that Blackjack is one of the most popular table games out there.
South beach casino buffet saturday. 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.
- 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.
Single Deck Blackjack Strategy Table Blackjack
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:
- 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
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 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.
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.
Now that you know about single deck Blackjack strategy, it's time to try a hand at the tables with this action-packed game.