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 4-8 Deck Blackjackblackjack basic strategy double deck  Multi-deck blackjack, also known as 4-8 deck blackjack, is the most common way to play blackjack today – with 6-deck being the most popular variant

Sources. The basic strategy for these games is almost identical, regardless of whether it uses 4 or 8 decks. Perhaps the worst rules variation that can be found at casinos these days is the short pay blackjack. " Recommended. If you end up with 0 at the end of the. This means that you expect, on. It can help players reduce their losses when they are at a disadvantage against dealers with strong upcards. Also, always split 8's to improve your hand since 16 is a bad hand with high chances of busting and low chances of winning. After splitting, doubling down is permitted and there is no surrender. As a rule of thumb, the player should stand in that situation. ENCYCLOPEDIA ENTRY. That is how blackjack is usually played. Blackjack may be played with one to eight decks of 52-card decks. The monetary sanction for doubling down according to a basic strategy chart intended for multiple-deck S17 games when playing single-deck blackjack is very small. The bust percentages for a dealer holding a 6 are 43. Binion’s and Four Queens deal the game with a 3:2 payout for $10. You're correct that the probability of winning on any basic strategy double down is better than 50%. Basic Strategy Audio Flashcards. Double Deck Blackjack or “Pitch” is a 2-deck variant allowing participants to pick up cards dealt face-down. Go back to the original bet after you lose. As the name suggests, there are only two 52-card decks in play in double deck blackjack, which is a pretty significant reduction from the 8 decks used as standard. Basic Strategy for Splittinq Pairs DEALER'S UPCARD 10,10 6,6 2,2 10 s H H H H s p D H. The fundamentals of how to play double-deck blackjack have been covered. That means you’re expected to double your bankroll again in about 300 hours of play. That’s 4X better odds than 6 or 8 deck games. Players may double their bet and stand or play normally. Multiple deck blackjack basic strategy chart from Blackjack Review. 21 Card Game Explained. Note, this is an ‘all things equal’ equation so differing house or specific game rules can and will slightly alter the house edge. Step #5: Pick the right table Blackjack works the same wherever you are in the world, but because of small variations in rules, games can pay out very different percentages. Dealer’s peeks. 260%. We’ll now look at the double-deck blackjack soft and hard hand strategies and. In a six-deck game with soft 17, you should surrender your 16 against. In both cases an A stands for ace. In both cases, an A stands for ace. Blackjack card values: All cards count their face value in blackjack. Of the 48 squares in blackjack charts which advise you to double, 38 occur when the dealer has. Double:House edge of 0. Blackjack used to be played with one single deck, which gave the players the lowest house edge. Blackjack Basic Strategy Chart: 4/6/8 Decks, Dealer Stands on All 17s (2-sided card). 9 – DO Take Advantage of the Casino’s Comps Program. As the name implies, it only uses one deck of cards, and basic strategy for this game does have a few differences from 4-8 deck blackjack. The dealers at some tables would hit soft 17 (H17) while at others, they would stand on this soft total (S17). (Use your back button to get back here. 21empress Are you looking for a basic strategy 'DEVIATIONS' chart?? If so I can give you this. Single Deck Blackjack Basic Strategy Double Deck Blackjack Strategy Shoe Games Blackjack Strategy. . An 8-deck game using the exact same rules has a. The cards from 2 through 9 are valued at their face value. )The number one rule in blackjack basic strategy is that when you have a pair of aces or eights on your hands, always split it. 341% compared to a six deck game’s . Let’s look at some different examples: Example #1. 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. 50% on condition one plays with basic strategy. Basic strategy is a set of guidelines telling you the best way to play every possible hand against every dealer upcard. The most important blackjack rule is simple: beat the dealer’s hand without going over 21. Double down if you have a 10 or 11 and the dealer has an up card that is worth less than your hand. Add those two probabilities together, and you have the probability of getting a blackjack. dealer’s 2. The rules of blackjack are flexible which is why there are so many variations and the reason for this exciting 5 deck blackjack strategy guide. Learn to play blackjack and hone your skills using our Blackjack Trainer: - FREE PLAY MODE: Practice playing with demo credits. You can only double down with your first two cards. The proper Basic Strategy for a double-deck game closely resembles that of a four- or six-deck game, much more so than a single-deck game. Failing that, you can always have a chart handy at the games table. Double Deck: Betting Spread Advise and Play Strategy Question. It should be noted that this strategy is applicable when the dealer stands on a soft 17, which is almost always the case in an 8 deck game. The splittable hands have been divided into two groups depending on whether or not doubling after splitting is allowed. After you hit a soft 17, what you do next depends upon the total of your hand and the dealer’s upcard. Your strategy will depend on whether the dealer Stands on soft 17 and if doubling down is permitted. Current counts indicate a value of +4, but because we still have two decks less a few cards, we have to divide +4 by. ) They also offer an 8-deck game where the house edge for a basic strategy player is 0. dealer's 9 upcard or less. Double soft 19 vs. A 2-card 21 is known as a "blackjack" and is the highest ranking hand. Perfect Pairs – bet pays out if the player is dealt two of a kind. With a few exceptions, blackjack basic strategy, simplified, assumes that any card you don’t see is equal to 10, because almost a third of the cards in the deck equal 10. For a bet spread of 1-8 units, the player should bet 1 unit at a true count of +1, 2 units at +2, 4 units at +3 and 8 units at +4 or higher. * Choose Number of. Step 4. But you have to do things slightly different than a 6 deck game, but I am not going to lay those out here. RH: Surrender if the option is available, else Hit. Keep a “Running Count” based off of the values of the card dealt. I play video blackjack using basic strategy at Harrah’s Cherokee Casino in NC. Table game players can take advantage of these comps, too. 2b: Probabilities of dealer blackjack before peek; 3a: Exceptions to single-deck S17 basic strategy; 3b: Exceptions to double-deck S17 basic strategy; 3c: Exceptions to single-deck H17 basic strategy; 4: Blackjack standard deviation details; 5: Infinite deck expected return by player hand and dealer upcard; 6: Fine points of when to. If the dealer has less than 21, you win. The few differences between a two-deck and six-deck game with the same rules (dealer hits or stands on soft 17, double after split is allowed, etc. With hard hands of 17-21, always stand. Players may double down only on 9, 10 or 11: +0. The few differences between a two-deck and six-deck game with the same rules (dealer hits or stands on soft 17, double after split is allowed, etc. No surrender. The Dealer Hits on Soft 17. Single: House edge of 0. The rocket booster never makes it to space. This is the house edge for a standard game of blackjack that uses from 1-8 decks of cards. There are a few reasons for that. So the two-deck game without a shuffler would be much better. With standard eight deck blackjack, a house edge of 44% is presented. This is not only because of fundamental. Basic Strategy for Single Deck Blackjack: Dealer Stands on Soft 17. It is represented as a percentage of every wager the casino expects to keep. 11% advantage for the house and causes you to deviate from the optimal strategy because you are no longer able to double on soft totals 13 through 18 against a dealer showing a 6 or a 5. You can see how that hits a player’s bottom line. 20%. That single deck game has really good rules, I would kill to play with those rules live. ). Blackjack Challenge. 2b: Probabilities of dealer blackjack before peek; 3a: Exceptions to single-deck S17 basic strategy; 3b: Exceptions to double-deck S17 basic strategy; 3c: Exceptions to single-deck H17 basic strategy; 4: Blackjack standard deviation details; 5: Infinite deck expected return by player hand and dealer upcard; 6: Fine points of when to. Hard 17 and above will always stand. ”. In a game with one deck, the probability looks like this: (4/52 X 16/51) + (16/52 X 4/51) = 32/663, which is the same as 0. Blackjack (formerly black jack and vingt-un) is a casino banking game. Blackjack House Edge. Single: House edge of 0. Advanced Blackjack Strategy. 7 hands. With this, ‘ Control Game ,’ the House Edge with Basic Strategy is 0. If you are not sure, just ask the dealer. 4–8 deck blackjack basic strategy charts. Increase your bet by 1 unit only after you win. Traditionally, the casino pays out 3-to-2 for a blackjack, so if you wager $10 and hit blackjack, you get $15 back. To use the basic strategy, look up your hand along the left vertical edge and the dealer's up card along the top. The game only knows basic strategy. Choose Blackjack with the Best Odds. The first table is for playing with one deck of cards, the second one is for playing with several decks. Blackjack Basic Strategy Tables Page 3 Single Deck – Dealer Hits on Soft 17 HARD HANDS Dealer's Up Card Hand Total 2 3 4 5 6 7 8 9 10 A 5,6,7 H H H H H H H H H HSingle Deck Blackjack Basic Strategy Double Deck Blackjack Strategy Shoe Games Blackjack Strategy. Grand (Tunica): 6 decks, dealer stands on soft 17, double on hard 9-11 only,double after split not allowed, tied blackjack wins, split only once. The value of a hand is simply the sum of the point counts of each card in the hand. ) lie mainly in splitting pairs and, since pairs are the. 5%, depending on the table rules. Avoid doubling on 11 against 10 or Ace. 04%: Double Deck: 0. It can take years to master the game of blackjack and become a winning player. Dealer hits soft 17 Fab Four Basic Strategy Variation. Two-deck or double-deck blackjack is one of the most popular variations of this exciting 21-card game. 13%. Another “arrow in your quiver. • Double down. For example 5,3 v 6 represents a true count of +3 and hence a basic strategy double. Fewer decks mean lower house edges. 17 through 21 always stand, regardless of the dealer's up card. Practice blackjack basic strategy with the help of easy trainer Play For Free Ready to play? Check out the #1 Blackjack Casino Lucky Creek. The key at the bottom explains in full. PH = Split if double after Split is Allowed, otherwise Hit. If you follow the basic strategy, you can cut the house edge down to around 1. Optimal Blackjack Strategy The rules of play 1. This works fine as long as you’re playing in a game being dealt from a single deck. The few differences between a two-deck and six-deck game with the same rules (dealer hits or stands on soft 17, double after split is allowed, etc. 15%. Tips for Winning With Basic Strategy. 810 Yonkers Ave, Yonkers, NY 10704-2099, USA. 13%. This is because the dealer has two chances to make a stiff hand of 17 or better. 18%. With this, ‘ Control Game ,’ the House Edge with Basic Strategy is 0. The first “secret” is that. * Choose Table Options/Rules. The formula is: average bet ($100) X hands played (700) X house advantage (0. The basic strategy for hitting in Blackjack is to take another card if your hand is valued at 8 or less, or if your hand is valued at 12-16 and the dealer’s up card is 7 or higher. 2b: Probabilities of dealer blackjack before peek; 3a: Exceptions to single-deck S17 basic strategy; 3b: Exceptions to double-deck S17 basic strategy; 3c: Exceptions to single-deck H17 basic strategy; 4: Blackjack standard deviation details; 5: Infinite deck expected return by player hand and dealer upcard; 6: Fine points of when to. 16:21. Fine points include whether the dealer hits soft-17 and allows double after splits. Features: * Instant feedback on incorrect answers. 5 & 6, otherwise hit. 87%). It tells you whether you should hit or stand, double down or split your hand. Without basic strategy, the house has a 1. Hit soft 18 vs. 3a: Exceptions to single-deck S17 basic strategy; 3b: Exceptions to double-deck S17 basic strategy; 3c: Exceptions to single-deck H17 basic strategy; 4: Blackjack standard deviation details; 5: Infinite deck expected return by player hand and dealer upcard; 6: Fine points of when to surrender; 7: Effect of card removal; 8: Analysis of blackjack. Active Member. and in doing so, improve their odds. 6: House edge of . Locals casinos and off-Strip 3:2 blackjack games Double-deck games Stand on 17. Whether you’re completely new to blackjack or already know your way around. However, that is a basic strategy exception. 5% for each positive true count. 3a: Exceptions to single-deck S17 basic strategy; 3b: Exceptions to double-deck S17 basic strategy; 3c: Exceptions to single-deck H17 basic strategy; 4: Blackjack standard deviation details; 5: Infinite deck expected return by player hand and dealer upcard; 6: Fine points of when to surrender; 7: Effect of card removal; 8: Analysis of blackjack. Single deck requires adding five additional indexes. 4062%. The dealer peeks. With all other hands of 11 or less, hit. 11%, and under the Microgaming rules the house edge is 0. This chapter contains the complete, accurate basic blackjack playing strategy in color coded charts and white tables for single-, double-, and four-or-more-decks blackjack games. All indexes are the same for double deck or six decks: +2. The table below illustrates basic strategy for S17 double-deck games. 21+3 – this bet involves the player’s cards and the dealer’s upturned cards. 3%, or 0. Can you send me. If the dealer hits a soft 17, you should double down on an 11 if the dealer is showing an ace. Offering a bridge between the traditional single-deck game and the high-energy multi-deck format, double-deck Blackjack brings a unique set of challenges and opportunities. For example, with A, 6 vs. Surrender 15, 8’s, and 17 vs. Does using perfect basic strategy help your Blackjack game? Watch JV at a Las Vegas casino with Blackjack bets from $50 - $150 per hand on a double deck gam. dealer’s Ace. When the true count is 2 or more, surrender your 15s against a dealer’s 9. These rules are not exactly player-friendly, but the RTP remains quite strong at 99. Here you will discover that you don’t have to be a genius to keep track of all the cards in a six-deck shoe; you just have to know a few card-counter secrets. Double Deck Blackjack or “Pitch” is a 2-deck variant allowing participants to pick up cards dealt face-down. The variant uses two decks instead of standard six and eight, opening possibilities for better RTP (99. 2b: Probabilities of dealer blackjack before peek; 3a: Exceptions to single-deck S17 basic strategy; 3b: Exceptions to double-deck S17 basic strategy; 3c: Exceptions to single-deck H17 basic strategy; 4: Blackjack standard deviation details; 5: Infinite deck expected return by player hand and dealer upcard; 6: Fine points of when to. These variations all include different rules, different side bets, and cater to different play styles. : 342 It is the most widely played casino banking game in the world. 5% to 2% edge. • Double down hard 9 against a dealer deuce. In all cases, if you cannot double down, hit instead. Double deck blackjack basic strategy chart from Blackjack Review. PD: Split if doubling down is permitted after splitting, else double down. p (Ten) = 16/51. In both cases an A stands for ace. When you’re dealt a blackjack 21, it’s customary to pay out 3:2 or 2:1. Dealer’s peeks. 77%) and. THE BASIC RULES WHEN PLAYING BLACKJACK: Blackjack starts with players making bets. You have 9 and the dealer’s upcard is 5. You will have to r e g i s t e r (free) before you can post: click the r e g i s t e r link to proceed. dealer’s Ace. dealer’s 6. These variations, which could add even more in a single-deck or a double-deck game, are famous for being the Illustrious 18. Even without card counting, knowing the correct basic strategy surrender moves will help to reduce the house edge. You will need a few variations for single-deck blackjack. No surrender. 39702%, if we compare that to single-deck with the exact same set of rules, the single deck game would have a House. Basic strategy to card counting, one step at a time. 50 percent. If you have a soft 19 in a single or double-deck H17 game, double down, if the dealer is holding a 6 because he has the greatest chance of busting. The left side of the card represents the player’s hand. 4 or more decks - total dependent. 14%). The proper Basic Strategy for a double-deck game closely resembles that of a four- or six-deck game, much more so than a single-deck game. Resplit aces. Fab Four Basic Strategy Variation. If the casino has an edge over the basic strategy player of . 1. With multiple decks, hit. The 10, Jack, Queen, and King are all valued at 10. The Dealer’s average hand amount is about 18. This is for 8 decks which is the standard for online casinos. Online Blackjack Strategy: Basic and Advanced. Check Details. Ones that pay 3:2 or 2:1 for a blackjack are the best possible option. Toggle navigation. 1 Single-Deck Blackjack Game The accurate basic playing strategy for a single-deck game contained in color-coded blackjack charts and white tables, for different rules. Having a hand value equal to 21 from the first two cards dealt to the player. If you’re going to be playing blackjack seriously, then you must learn the 6-deck basic blackjack strategy chart. You will have to r e g i s t e r (free) before you can post: click the r e g i s t e r link to proceed. (1) Never take an insurance bet. For online blackjack click 'bet', or 're-bet' if you want to duplicate your last wager. With thousands of hours of playing experience, I have experienced hugely better results on double than 6 deck. This guide provides the essential double deck basic strategy charts and pro tips to memorize. Standing on a hand that is 21 or lower, while the dealer goes over 21. The basic strategy is adjusted based on the variant in order to produce the best results. Here’s the detailed two-deck blackjack cheat sheet: The Dealer Stands on Soft 17. Using the ordinary total-depenendent basic strategy the player advantage under the Boss Media rules is 0. So the two-deck game without a shuffler would be much better. The same chart is also available in the. Basic Strategy Blackjack Charts. 30% with basic strategy. 09%; Players may not double down after splitting: +0. Composition-Dependent Strategy for Double. The variant uses two decks instead of standard six and eight, opening possibilities for better RTP (99. PERCENT REDUCTION IN HOUSE EDGE. Blackjack pays 3 to 2. 1 deck - total dependent. 42%: Four Decks: 0. Another “arrow in your quiver. Basic Strategy Blackjack Double Deck - When playing any online casino game for the first time, it is best to start simple and then progress to more complex versions. However the actual probability is much less, because as the player gets each blackjack the ratio of aces to cards left in the deck decreases. They are shuffled together and dealt at the beginning of each hand. YouTube: 2 Decks, Stand on Soft 17. The most important blackjack rule is simple: beat the dealer’s hand without going over 21. To win blackjack like a pro, learn and follow basic strategy, double down when your first two cards total 11, never split 10-value cards or 5's, be aware of streaks, and take advantage of casino. Soundcloud: Blackjack Basic Strategy - 2 Decks, Stand on Soft 17. So the probability of four in a row is (64/1326) 4 = 16777216/ 3091534492176 = 1 in 184270. You will need a few variations for single-deck blackjack. Doubling down is permitted on any two cards. Also double down with 9 if the dealer up card is a 3, 4, 5 or 6. The following table shows the simple S17 double-deck games technique. In many double deck variants of the game, the player is allowed to double only on starting totals of 9, 10, and 11. 126 for doubling). It’s just like a standard deck of cards, but they’ve removed the 10s. The suits of the cards do not have any meaning in the game. The right two columns represent a dealer ace according to whether the. Learn some basic blackjack strategy and enjoy the game2b: Probabilities of dealer blackjack before peek; 3a: Exceptions to single-deck S17 basic strategy; 3b: Exceptions to double-deck S17 basic strategy; 3c: Exceptions to single-deck H17 basic strategy; 4: Blackjack standard deviation details; 5: Infinite deck expected return by player hand and dealer upcard; 6: Fine points of when to. For example, in a double-deck game with h27, if you were dealt an A-3, you should not only double down when the dealer’s upcard is 5 or 6 but also against a 4. (The jacks, queens, and kings are still in the deck. 17 questions (or so)The basic strategy recommends some pair splits as a defensive play. Download the Blackjack Strategy Chart. 89% in S17 single-deck games and 43% in H17 single-deck blackjack. For example a single-deck S17 game with NDAS and doubling on any 2 cards has a house edge of just 0. Choosing 6-Deck Blackjack Strategy Charts. Learn the rules and Wizard's Simple Strategy in this introductory video. In double-deck blackjack, hit when the count is 0 or lower. Anyway, all this means you can simply rely on the trusty old blackjack basic. Blackjack novices should bear in mind following basic. (or higher. It is the most popular table game in the United States, and is easily found in casinos throughout the world. 16. Lightning Blackjack rules have just a few caveats. Using the tables, find your hand total on the left, and the dealer’s up card along the top. 1D S17 | 1D H17 | 2D S17 | 2D H17 | MD S17 | MD H17. The following tables display expected returns for any play in blackjack based on the following rules: dealer stands on a soft 17, an infinite deck, the player may double after a split, split up to three times except for aces, and draw only one card to split aces. 4-8 Deck Blackjack Strategy Chart Here is a short list of the side bets: Insurance – insurance against “Blackjack” if the dealer has an ace with its face up. Click here to download the Blackjack Deviations Chart for 4 to 8 Deck – Dealer STANDS on Soft 17 (245kb) There is no such thing as an all-encompassing chart. The underlying principle behind card counting is that a deck rich in tens and aces is good for the player, a deck rich in small cards is good for the dealer. The playing strategy changes that you should make when switching from a six- or eight-deck game to a double-deck game with the above rules are as follows. Play. Factor in the following changes: Double 11 vs. 05 billion hands the loss of the first player was 0. The player edge in single-deck blackjack on my site is based on otherwise multiple deck rules, which rarely exist in single deck. Double down on soft 19 if dealer up-card is 6. For the purpose of this test, we are going to use common rules which are: 6 Decks. The payout varies depending on the combination. 96%. From top to bottom are the hard totals, soft totals, and splittable hands. Our local casino hands out promotional coupons, which act as a first-card ace in blackjack. Playing KO at 2D for 70-min will yeild the same expectation as playing HO2 w/ASC for 62-min. As my blackjack calculator show difference in house edge between four decks and five decks is 0. The difference between five decks and two decks, all other rules being equal, is 0. Whenever you end up winning a whole unit, you would restart the system and go back to betting your initial unit. In multiple-deck and double-deck blackjack where the dealer must hit soft 17, you will save more money by surrendering rather than splitting. Using the ordinary total-depenendent basic strategy the player advantage under the Boss Media rules is 0. Hard nine vs. If you are dealt a pair, always double down on your first two cards. With multiple decks, hit. Double Deck Blackjack with Surrender (Southern California) Barona Casino Sycuan Casino Harrah’s Rincon Casino * Pechanga and Pauma no longer offer surrendering on double deck. 08%. Finally, always double down on a soft 18 if the dealer has a 2. Conclusion. • Split 7-7 against a dealer 8. . It is a strategy which maximizes the player’s expectation given only knowledge of the player’s hand and the dealer’s up-card. If. You can use more advanced and complex blackjack. This is the best strategy for online blackjack because it helps you dial down. You’ll find that there are four different 6-deck blackjack strategy charts all in all: S17 DAS; H17 DAS; S17 NDAS. 2 If you have a hand of 12 against the dealer’s 2 in double-deck games, you should stand at a count of +4 or higher; Double-Deck Blackjack Strategy Tips. Double Deck Blackjack is a specific example of the shoe size rule applying in the game of blackjack. The biggest difference between Spanish 21 and regular blackjack is the deck. 1. Blackjack should need no introduction. Blackjack uses a standard deck of 52 cards, but itDon Schlesinger ’s Ultimate Blackjack Basic Strategy Cards feature Don’s easy-to-use basic strategy and his new, cutting-edge ultimate strategy for use with either casino or online play. Each 3. In other words, if a player plays eight-deck blackjack, they would begin their running count at –28. Table pays 3-2 when hitting a blackj. - BASIC STRATEGY DRILL: Get feedback on your every decision. P = Split. If the dealer’s upcard is a 4, 5, or 6, players need to double down. Double Deck Blackjack Strategy HOME Blackjack Guide Double Deck Blackjack Strategy Basic strategy for double-deck games, S17 The table below illustrates basic. Hard 12 will stand against 4-6, hit against everything else. Which counting system do you use? Is there a difference for deviations between double deck and 4-8 deck? Because I just use the same deviations for both of them. 3%, or 0. The total value of that hand is 16 and that is considered the worst blackjack hand. The Buster count system usually has the 7,8,9,T labeled as +1 when removed, and cards like A,2,3 labeled as -2. Players can expect slow payments, low cashout limits and slow response from customer support. This means that you expect, on. 9% for 3:2 and 6:5, respectively), and assuming a flat bet of $10/hand at a full table where you are being dealt 52 hands/hour, your expected losses per-hour are as follows: At the 3:2 game- $2. When playing multiple-deck blackjack, basic strategists should always double on soft hands as follows: Soft 13 and soft 14 against a dealer with. For instance, dealer’s got 7 against your 14. Despite popular belief, the Dealer standing on a soft total of 17 is actually better for the player than when the dealer must hit soft 17. Never bet more than half your stack on a. Look at the top line and find there a dealer’s card value. From top to bottom are the hard totals, soft totals, and splittable hands. Always refer to a single-deck basic strategy chart for best results. Dealer stands on soft 17. 2b: Probabilities of dealer blackjack before peek; 3a: Exceptions to single-deck S17 basic strategy; 3b: Exceptions to double-deck S17 basic strategy; 3c: Exceptions to single-deck H17 basic strategy; 4: Blackjack standard deviation details; 5: Infinite deck expected return by player hand and dealer upcard; 6: Fine points of when to. 15 stands against dealer 2 through 6, otherwise hit. 5%. Always refer to a single-deck basic strategy chart for best results. The 8 Deck Blackjack strategy is the same as using the 4-deck, 5-deck, 6-deck, and 7-deck blackjack strategies. 55% house edge. dealer's 9, 10 or Ace upcard. Double:House edge of 0.