Blackjack
89 questions

Straight answers.

Short, correct answers with a link to the full explanation. Strategy answers assume six decks, dealer stands on soft 17, double after split and no surrender unless stated.

Rules

What is a soft 17 in blackjack?
A soft 17 is any hand totalling 17 in which an ace is being counted as eleven, such as ace–six or ace–two–four. It is "soft" because drawing a card cannot bust it: if the next card would take the total past 21, the ace simply counts as one instead. A hand such as ten–seven, or ace–six–ten, is a hard 17. The distinction matters for the dealer's rule (S17 or H17) and for your own play, because soft 17 is usually a hand to hit or double rather than stand on. Read more →
What does "dealer must hit soft 17" mean?
It means the dealer keeps drawing when their hand is a 17 that includes an ace counted as eleven, for example ace–six, and only stops on a hard 17 or any total of 18 or more. Casinos abbreviate this rule to H17. The alternative, S17, has the dealer stand on every 17. Hitting soft 17 helps the house: the dealer can improve the hand more often than it busts, which adds roughly 0.2 percentage points to the house edge compared with the same game under S17. Read more →
What does the dealer do on 17?
The dealer has no choices. Under the common rule printed on the table felt, the dealer draws on any total of 16 or less and stands on any 17 or more. The only variation concerns soft 17: at an S17 table the dealer stands on ace–six, and at an H17 table the dealer hits it. The dealer never doubles, splits, surrenders or takes your cards into account; they follow the fixed rule regardless of what the players hold. Read more →
How are aces counted in blackjack?
An ace counts as either one or eleven, whichever helps the hand without busting. Ace–seven is 18 (soft), because the ace is counted as eleven; draw a ten and the same ace becomes one, giving hard 18. You never choose the value out loud; it is applied automatically. Only one ace in a hand can count as eleven at a time, since two elevens would already total 22. Tens, jacks, queens and kings all count ten, and every other card counts its face value. Read more →
What is a natural in blackjack?
A natural, also simply called a blackjack, is an ace plus a ten-value card (ten, jack, queen or king) as your first two cards. It is paid at a premium, 3:2 at a full-payout table, so a £10 bet wins £15 plus the stake back. A 21 made with three or more cards, or an ace–ten made after splitting, is only an ordinary 21: it beats a dealer 20 but loses to a dealer natural and is paid at 1:1. Read more →
What is a push in blackjack?
A push is a tie between your final total and the dealer's. Your bet is returned and you neither win nor lose. Two naturals push, two 19s push, and so on. A push does not occur when you bust, because a bust loses immediately even if the dealer later busts too. Note that at most tables a player's three-card 21 does not push a dealer natural: the natural outranks it and the player loses. Read more →
What is a hard hand in blackjack?
A hard hand either contains no ace or contains an ace that must be counted as one to avoid busting. Ten–six is hard 16; ace–five–ten is also hard 16, because counting the ace as eleven would make 26. Hard totals from 12 to 16 are the "stiff" hands that can bust on a single card, which is why basic strategy spends so much effort on them. A soft hand, by contrast, has an ace still counting as eleven and cannot bust on the next card. Read more →
What is surrender in blackjack?
Surrender lets you give up your hand after seeing the dealer's upcard and lose only half your bet instead of playing on. Late surrender, the common form, is offered after the dealer has checked for blackjack; early surrender, which is rare and more valuable, is offered before that check. It is correct only in a few spots, chiefly hard 16 against a 9, 10 or ace and hard 15 against a 10. Many tables, including the profile this site's chart uses, do not offer it at all. Read more →
What does double after split (DAS) mean?
Double after split, abbreviated DAS, means that once you have split a pair you may double down on either of the resulting hands if the first card drawn makes a good doubling total. Split a pair of fours against a 6, draw a five on one hand for a nine, and DAS lets you double on that nine. The rule favours the player by roughly 0.1 to 0.15 percentage points and changes a few strategy decisions: with DAS you split 2s and 3s against a 2 or 3, 4s against a 5 or 6, and 6s against a 2. Read more →
What is the difference between 6:5 and 3:2 blackjack?
The ratio is what a winning natural pays. At 3:2 a £10 bet on a blackjack wins £15; at 6:5 the same bet wins only £12. You are dealt a natural about 4.75% of the time in a six-deck game, so losing £3 of profit per £10 on each one costs about 1.4 percentage points of return over the long run. That is more than every other common rule variation combined, which is why experienced players avoid 6:5 tables even when the minimum bet is lower. Read more →
How many decks are used in blackjack?
Anything from one to eight standard 52-card decks, with no jokers. Most casino tables today deal six or eight decks from a shoe; single- and double-deck games are usually dealt by hand. Fewer decks are better for the player when every other rule is equal, because naturals and good doubles come slightly more often, but casinos frequently pair single-deck games with the 6:5 payout, which more than wipes out the deck advantage. Check the payout before the deck count. Read more →
What is a shoe in blackjack?
The shoe is the box on the dealer's left from which cards are dealt one at a time in multi-deck games. Typically it holds six or eight shuffled decks with a plastic cut card inserted part-way through; when the cut card appears, the dealer finishes the current round and reshuffles. In a shoe game the player's cards are dealt face up and you do not touch them. "Shoe game" describes only the dealing method, not the payout or the dealer's soft-17 rule. Read more →
What is a continuous shuffling machine (CSM)?
A continuous shuffling machine is a device that takes the cards from each completed round and mixes them back into the undealt cards straight away, so the game never reaches a cut card and is never reshuffled by hand. For a basic-strategy player it changes the house edge only negligibly, and in fact slightly favours the player compared with a cut-card shoe, but it removes any possibility of card counting because the composition of the remaining cards never drifts far from a fresh shoe. Its real cost is speed: more hands per hour at the same edge. Read more →
What is no-hole-card (European) blackjack?
In a no-hole-card game the dealer takes only one card at the start and draws the second after all players have finished. Because there is no hole card, the dealer cannot check for blackjack before you act, so you may double or split and then lose to a dealer natural. Under the strict European rule (ENHC) you lose every bet on the table; under "original bets only" (OBO) you lose only your initial stake. Strategy adjusts: against a dealer ace or 10 you double and split less often. Read more →
Does a blackjack beat a 21?
Yes. A natural (ace plus ten-value card as your first two cards) beats any 21 made with three or more cards, and beats a 21 made after a split. If you draw to 21 and the dealer turns over a natural, you lose. If both you and the dealer have naturals, the hand is a push. This ranking is the reason the dealer checks the hole card for a natural before anyone plays in a US-style game: a dealer blackjack ends the round immediately. Read more →
Can you split a king and a queen?
Most casinos allow you to split any two ten-value cards, so a king and a queen count as a pair for splitting; a few restrict splits to identical ranks, so check the table rules. Whether you can is a separate question from whether you should. Basic strategy says never split 10s under any dealer upcard: a hard 20 is already the second-best hand you can hold, and two hands starting from ten each have less expected value in total than the 20 you break up. Read more →
What happens if the player and the dealer both bust?
The player loses. Players act before the dealer, and a bust is settled immediately: your cards and bet are collected the moment your total exceeds 21, before the dealer has drawn a single card. If the dealer later busts, that helps only the players who are still in the hand. This ordering is the entire source of the house edge in blackjack, and it is why basic strategy sometimes tells you to stand on a weak total rather than risk busting first. Read more →
What does it mean when the dealer peeks?
When the dealer's upcard is an ace or a ten-value card, a US-style game has the dealer check the face-down hole card for a natural before any player acts, usually with a small mirror or electronic reader so nobody else sees it. If there is a blackjack, the round ends and only insurance bets and player naturals are settled. If there is not, play continues and you can double or split knowing you cannot lose those extra bets to a dealer natural. The site's chart assumes this peek rule. Read more →

Basic strategy

What is basic strategy in blackjack?
Basic strategy is the complete set of decisions (hit, stand, double, split, surrender) that gives the best long-run expected result for every combination of your hand and the dealer's upcard, taking into account only those cards and the table rules. It was derived by exhaustive calculation and simulation, not by instinct, and it is usually presented as a colour-coded chart. Played perfectly, it reduces the house edge to around half a per cent in a good game. It does not predict the next card and it does not guarantee a win on any hand or session. Read more →
Does basic strategy change with the number of decks?
Slightly. The core chart for four to eight decks is identical, which is why this site uses one six-deck chart. Single- and double-deck games have a handful of extra doubles because removing a few cards changes the composition more: for example, in single deck you double hard 8 against a 5 or 6 and hard 11 against an ace. The dealer's soft-17 rule and whether you may double after splitting change more decisions than the deck count does. Always state which rules a chart assumes. Read more →
How much does basic strategy reduce the house edge?
A great deal. In a six-deck game with the dealer standing on soft 17, double after split allowed and 3:2 naturals, perfect basic strategy leaves a house edge of roughly 0.4 to 0.5% of the initial bet, so a player betting £10 a hand expects to lose about 5p per hand on average. Casual players who mimic the dealer or play by feel typically give up several times that amount; published estimates put the untrained edge at around 2% or more. The difference is entirely in the decisions, not the bets. Read more →
What is the easiest way to memorise basic strategy?
Learn it in layers rather than cell by cell. Start with the hard totals (always hit 8 or less, always stand on 17 or more, stand on 12–16 only against a 2 to 6 with the exception that 12 hits against 2 and 3), then the doubles (11 against everything but an ace, 10 against 2 to 9, 9 against 3 to 6), then pairs (always split aces and 8s, never 10s or 5s), then the soft hands. Drill each layer until it is automatic before adding the next. A trainer that deals random hands and corrects mistakes is far faster than staring at the chart. Read more →
Is there one basic strategy chart for every blackjack game?
No. The correct chart depends on the number of decks, whether the dealer hits or stands on soft 17, whether you may double after a split, whether surrender is offered and whether the dealer peeks for blackjack. The differences are small, usually fewer than ten cells, but they are real. This site's chart assumes six decks, dealer stands on soft 17, double on any two cards including after a split, no surrender, dealer peeks and naturals pay 3:2, which is a common configuration. Any chart that does not state its rules should be treated with caution. Read more →
Should I ever stand on 12?
Yes, when the dealer shows a 4, 5 or 6. Those upcards bust most often, so standing on 12 and letting the dealer draw is worth more than risking the four ten-value ranks that would bust you. Against a 2 or 3 the dealer busts less often and you should hit; against a 7 or higher you always hit. This is the standard six-deck S17 answer and one of the most-missed rows on the chart, because standing on 12 against a 2 feels safe but costs money over time. Read more →
When should I double down?
Double when one more card is likely to give you a strong total and the dealer is likely to bust or finish weak. Under six-deck S17 rules with double after split: double hard 11 against every upcard except an ace, hard 10 against 2 to 9, and hard 9 against 3 to 6. Double soft 13 and 14 against 5 and 6, soft 15 and 16 against 4 to 6, soft 17 against 3 to 6, and soft 18 against 3 to 6. Never double a hard 12 or more; the risk of busting outweighs the extra stake. Read more →
When should I hit a soft 18?
Hit soft 18 (ace–seven) when the dealer shows a 9, 10 or ace. Eighteen sounds good, but against those upcards the dealer finishes with 19 or better too often for 18 to be a favourite, and because the hand is soft you cannot bust by taking one card. Against 3 to 6 you should double instead, and against a 2, 7 or 8 you stand. This is the six-deck S17 answer; under H17 you also double soft 18 against a 2. Read more →
What is composition-dependent strategy?
Ordinary basic strategy is total-dependent: it looks only at your total and the dealer's upcard. Composition-dependent strategy also considers which cards make up the total. The classic example is hard 16 against a 10: with ten–six you hit, but with three or more cards (say 4–5–7) you stand, because the small cards you hold are the ones you would want to draw. These exceptions are worth only a few hundredths of a per cent in a six-deck game, so learn the basic chart first; this site's trainer teaches the total-dependent version. Read more →
Does basic strategy guarantee that I will win?
No. Basic strategy minimises the house edge; it does not eliminate it. In a good six-deck game the casino still keeps roughly half a per cent of everything you bet over the long run, so a perfect player is expected to lose slowly, and any single session can swing far in either direction because the standard deviation of one hand is more than a whole bet. What basic strategy does guarantee is that no other way of playing the cards, without counting, loses less. Anyone claiming a system that beats the game by varying bets alone is wrong. Read more →

Specific hands

Should I hit 16 against a dealer 10?
Yes, hit, if surrender is not offered. Under the six-deck, dealer-stands-on-soft-17 profile used on this site, hard 16 against a 10 is a losing hand whatever you do, but hitting loses less than standing: standing wins only when the dealer busts, which happens roughly a fifth of the time with a 10 showing. If late surrender is available, surrendering is slightly better still. The exception is a 16 made of three or more small cards, where standing edges ahead; with ten–six, hit. Read more →
Do I hit 16 against a dealer 7?
Yes. Against a 7 the dealer makes 17 or better about three times in four, so a standing 16 wins only on the dealer's roughly one-in-four bust. Hitting busts you about 62% of the time, but the remaining draws give a total that competes. Under six-deck S17 rules with no surrender, hitting is correct for hard 13, 14, 15 and 16 against any upcard of 7 or higher, and surrender is not used for 16 against a 7 even where it is offered. Read more →
Should I hit 12 against a dealer 2?
Yes, hit. This is one of the most counter-intuitive rows in basic strategy. The dealer busts only about 35% of the time from a 2, not enough to justify standing on a weak 12, and only the four ten-value ranks (about 31% of cards) bust you. Under six-deck S17 rules hit 12 against a 2 and a 3, stand against 4, 5 and 6, and hit against 7 or higher. Whatever you draw, re-evaluate the new total against the chart. Read more →
Do I stand on 12 against a 4?
Yes, stand. Against a 4, 5 or 6 the dealer busts about 40% of the time, which is enough to make standing on 12 the better of two poor options; hitting risks an immediate bust on roughly 31% of draws for only a modest improvement when you survive. The margin against a 4 is slim, which is why 12 against a 2 and a 3 flips to a hit. Six-deck S17 rules; the answer is the same under H17. Read more →
What should I do with 15 against a 10?
Hit, under the six-deck S17 no-surrender profile this site uses. You bust on seven ranks (7 through king, about 54% of cards), but standing wins only when the dealer busts from a 10, which is roughly one time in five. Hitting loses less on average. If late surrender is offered, surrender 15 against a 10 instead; it is one of the few surrender plays that is correct in a six-deck game. Read more →
Should I double 11 against a dealer ace?
Not under the rules this site's chart assumes. With six decks and a dealer who stands on soft 17, hard 11 against an ace is a hit, because the dealer finishes strongly too often from an ace to make committing a second bet worthwhile. If the dealer hits soft 17 (H17) the answer flips to double, and in single-deck games you double as well. Against every other upcard, 2 through 10, double 11. Read more →
Do I double 10 against a dealer 10?
No, hit. Doubling hard 10 is correct against 2 through 9, where you are a clear favourite, but against a 10 or an ace the dealer finishes with 20 or better often enough that risking a second bet for a single card is a losing proposition compared with hitting, which keeps the option to draw again if you catch a small card. Six-deck S17 rules. Read more →
Do I double 9 against a 3?
Yes. Under six-deck S17 rules hard 9 doubles against a dealer 3, 4, 5 or 6. The dealer busts between about 37% and 42% of the time from those cards, and nearly a third of your draws give you 19, so putting a second bet on the hand is worth more than hitting. If the table does not allow doubling on 9 (some restrict doubles to 10 and 11), hit instead. Read more →
Should I hit soft 18 against a 9?
Yes, hit. Ace–seven against a dealer 9 is a losing hand whether you stand or hit, but hitting loses less, because the dealer reaches 19 or better from a 9 more often than not and your soft hand cannot bust on one card. The same applies against a 10 and an ace. Against a 2, 7 or 8, stand; against 3 to 6, double. Six-deck S17 rules. Read more →
What do I do with soft 18 against a dealer 2?
Stand, under the six-deck S17 profile this site uses. A dealer 2 is not weak enough to justify doubling and 18 is strong enough to keep. If the dealer hits soft 17 (H17), the dealer's finishing totals shift upward enough that doubling soft 18 against a 2 becomes correct instead, which is one of the handful of cells that changes between the two charts. Read more →
Should I double soft 18 against a 3?
Yes. Under six-deck S17 rules soft 18 doubles against a dealer 3, 4, 5 or 6. You already hold a hand that beats a finished dealer total more often than not, the dealer busts frequently from those cards, and a soft hand cannot bust on the one card a double gives you. If the table forbids doubling soft hands, stand instead. Against a 2 stand; against 7 or 8 stand; against 9, 10 or ace hit. Read more →
Do I hit or stand on soft 17 against a 2?
Hit. Never stand on soft 17 in a standard game: 17 wins only when the dealer busts, and you cannot bust by drawing to ace–six. Under six-deck S17 rules double soft 17 against 3, 4, 5 and 6, and hit it against 2, 7, 8, 9, 10 and ace. If you draw a ten you end up on hard 17, which you then stand on. Read more →
Should I double soft 13 against a 5?
Yes. Ace–two against a dealer 5 or 6 is a double in a six-deck S17 game, and so is ace–three. The hand itself is weak, but the dealer busts over 40% of the time from a 5 or 6, so a second bet is worth more than the single hit. Against any other upcard, including a 4, hit soft 13 and soft 14; soft 15 and 16 add the 4 as a doubling card. Read more →
Should I split 8s against a dealer 10?
Yes, split, if surrender is not available. A pair of eights is hard 16, the worst total in the game; splitting turns it into two hands starting from 8 that can each reach 18. You will still lose money on average against a 10, but less than by hitting or standing on 16. Under six-deck S17 rules with double after split, split 8s against every upcard including a 10 and an ace. With late surrender offered, some charts prefer surrendering 8–8 against an ace in H17 games; the site profile has no surrender. Read more →
Should I always split aces?
Yes, against every dealer upcard. A pair of aces counts as soft 12, a poor hand; split, each ace starts a hand at eleven with a strong chance of 21. Most tables deal only one card to each split ace and do not let you draw again or resplit, and an ace–ten after a split counts as 21 rather than a natural, so it pays 1:1. Even with those restrictions splitting is clearly best. Six-deck S17 rules; the answer does not change under H17. Read more →
Why should you never split 10s?
Because a hard 20 wins the great majority of hands, and two hands that each start on ten are worth less in total than the one 20 you give up, against every dealer upcard. Splitting 10s against a 6 does win money, but less than standing wins, so it is still a mistake. It is also a reliable way to irritate the rest of the table. The only people who split 10s correctly are card counters in a very high count, and even then only against a 5 or 6. Read more →
Do I split 9s against a 7?
No, stand. A pair of nines is hard 18, and against a 7 the dealer is most likely to finish on exactly 17, which 18 beats. Splitting would turn one winning hand into two 9s that each need a strong draw. Under six-deck S17 rules split 9s against 2 through 6 and against 8 and 9, and stand against 7, 10 and ace. It is the only pair whose split rule has a gap in the middle. Read more →
Should I split 9s against a dealer 9?
Yes, split. Standing on 18 against a 9 is a loser, because the dealer reaches 19 or better from a 9 more often than not. Two hands starting from 9 each have a real chance of 19, so splitting converts a losing 18 into two hands that together lose less, or win. Under six-deck S17 rules split 9s against 2 to 6, 8 and 9; stand against 7, 10 and ace. Read more →
Should I ever split a pair of 5s?
No. Two fives make hard 10, one of the best doubling hands in the game, while two hands that each start on 5 are weak. Treat the pair exactly as a hard 10: double against a dealer 2 through 9 and hit against a 10 or an ace, under six-deck S17 rules. The strategy chart lists 5–5 with the pairs only to make the point that it is never split. Read more →
Do I split 4s against a 5?
Yes, if the table allows doubling after a split; this site's chart assumes it does. Each 4 can draw a 5, 6 or 7 for a hand you then double against a weak dealer card, and that option is what makes the split worthwhile. Split 4s only against a 5 or 6. Without double after split, hit 4–4 (hard 8) against everything. Against 2, 3, 4 and 7 through ace, hit. Read more →
Should I split 2s against an 8?
No, hit. Pairs of 2s and 3s are split only against a dealer 2 through 7 in a six-deck game with double after split; against 8 or higher the dealer is too strong for two weak hands, so you play the pair as hard 4 or 6 and hit. Against a 7 you still split, because a 7 finishes on exactly 17 so often that a hand reaching 18 or better wins outright. Read more →
Should I ever hit hard 17?
No. Stand on every hard 17 or more against every dealer upcard, including an ace. Hard 17 against an ace or a 10 is a losing hand, but hitting it busts about 69% of the time (any card above a 4) for a small chance of improvement, so standing loses less. Only in a few rare H17 single-deck surrender situations is anything other than standing considered, and never under the six-deck S17 profile this site uses. Read more →

Odds and maths

What is the house edge in blackjack?
It depends entirely on the rules and on how well you play. In a six-deck game where the dealer stands on soft 17, doubling after splits is allowed, there is no surrender and naturals pay 3:2, perfect basic strategy leaves an edge of roughly 0.4 to 0.5% of the initial bet. A 6:5 payout adds about 1.4 points, hitting soft 17 adds about 0.2, and sloppy play adds more still. The edge is expressed per initial bet, so doubles and splits are not counted in the denominator. Read more →
What are the odds of busting when I hit?
Counting the thirteen ranks as equally likely: hard 12 busts on 4 of 13 draws (31%), 13 on 5 (38%), 14 on 6 (46%), 15 on 7 (54%) and 16 on 8 (62%). Hard 11 or less cannot bust on one card. These are the figures for a full-composition shoe; the cards already on the table shift them slightly. Soft hands cannot bust on a single draw at all, because the ace reverts to counting one. Read more →
How often does the dealer bust?
About 28% of all hands overall, but it varies sharply with the upcard. Published figures for a dealer standing on soft 17 are roughly 35% from a 2, 37% from a 3, 40% from a 4, 42% from a 5 and 6, then 26% from a 7, 24% from an 8, 23% from a 9, 23% from a 10 and 17% from an ace once a natural has been ruled out. That cliff between 6 and 7 is why basic strategy stands on stiff hands against 2 to 6 and hits them against 7 and up. Read more →
What are the odds of being dealt a blackjack?
In a six-deck shoe there are 24 aces and 96 ten-value cards among 312 cards. The number of two-card combinations is 312 × 311 ÷ 2 = 48,516, of which 24 × 96 = 2,304 are naturals, so the probability is 2,304 ÷ 48,516 = 4.75%, about one hand in 21. For a single deck it is 4 × 16 ÷ 1,326 = 4.83%. The dealer has the same chance, which is why two naturals push roughly once in every 440 hands. Read more →
Does blackjack have the best odds in the casino?
Among the common table games, yes, provided you play basic strategy at a 3:2 table: a house edge of around half a per cent is lower than baccarat's banker bet (about 1.06%), the craps pass line (about 1.41%) and far lower than most slot machines. The qualification matters. A 6:5 blackjack table played by feel can have an edge of 3% or more, worse than several alternatives. The odds are good only because of the decisions you make, which is unusual among casino games. Read more →
What does expected value mean in blackjack?
Expected value (EV) is the average result of a decision if it were repeated an enormous number of times, expressed as a fraction of the bet. Hard 16 against a 10 has an EV of about −0.54 if you stand and about −0.54 if you hit under six-deck S17 rules, with hitting a hair better; both lose, but basic strategy picks the one that loses least. EV says nothing about the next hand, only about the long-run average, and a winning outcome never proves a decision was correct. Read more →
How much can I expect to swing in a blackjack session?
A lot relative to the edge. The standard deviation of a single hand of blackjack is about 1.15 times the initial bet, because doubles, splits and 3:2 naturals widen the spread of outcomes. Over 100 hands at £10 the expected loss with basic strategy is about £5, but one standard deviation is roughly £115, so finishing £100 up or £100 down is entirely ordinary. Over thousands of hands the expectation grows in proportion to hands played while the swings grow only with their square root, which is how the small edge eventually shows. Read more →
How much does a 6:5 payout cost the player?
About 1.4% of every bet. You are dealt a natural roughly 4.75% of the time in a six-deck game, and 6:5 pays 1.2 times the bet instead of 1.5, a shortfall of 0.3 bets each time: 0.0475 × 0.3 ≈ 0.014, or 1.4 percentage points, slightly less once naturals that push against a dealer natural are excluded. Published figures put the cost at about 1.39%. That turns a game with a 0.4% edge into one with nearly 1.8%, more than quadrupling what the casino expects to win from you. Read more →
What does RTP mean for blackjack?
Return to player is the long-run percentage of money wagered that is paid back, so it is simply 100% minus the house edge on the same accounting basis. A game with a 0.5% house edge has an RTP of 99.5%. Online casinos quote RTP for their blackjack tables; the figure assumes perfect basic strategy for the stated rules and tells you nothing about how any particular session will go. If a blackjack RTP is quoted below about 99%, look at the rules: the payout or dealer rule is probably unfavourable. Read more →
Does it matter if the dealer hits soft 17?
Yes, by about 0.2 percentage points of house edge, which is a large fraction of the whole edge in a good game. When the dealer hits ace–six the hand improves to 18 or more often than it busts, so players lose slightly more. It also changes a few strategy cells: under H17 you double 11 against an ace, double soft 18 against a 2, double soft 19 against a 6 and, where surrender is offered, surrender 15 and 17 against an ace. This site's chart assumes S17. Read more →

Card counting

Does card counting actually work?
Yes, in the specific sense that the odds genuinely swing in the player's favour when the remaining shoe is rich in tens and aces, and a counter who bets more at those moments can gain a small long-run edge, typically between 0.5% and 1.5% depending on rules, penetration and bet spread. It does not work in the sense most people imagine: it does not tell you the next card, it needs a large bankroll to ride out variance, it demands near-perfect play for hours, and casinos are free to ask you to leave. Read more →
How does the Hi-Lo count work?
Hi-Lo assigns +1 to each 2, 3, 4, 5 and 6, 0 to each 7, 8 and 9, and −1 to each ten-value card and ace. You add the values of every card you see to keep a running count that starts at zero after a shuffle. A positive count means more high cards remain, which favours the player (more naturals, better doubles, more dealer busts). To use it you divide by the estimated decks remaining to get a true count, bet more when it is high, and sit at the minimum when it is not. Read more →
What is the true count in card counting?
The true count is the running count divided by the number of decks still to be dealt. A running count of +6 means something quite different with five decks left (true count just over +1) than with one deck left (true count +6), because the surplus of high cards is concentrated in fewer cards. In Hi-Lo each point of true count is worth roughly half a per cent of edge to the player, so a true count of about +1 cancels the house edge and higher counts justify larger bets. Read more →
Can you count cards playing blackjack online?
Not profitably. Software (RNG) blackjack shuffles every hand, so there is never a deck composition to track. Live-dealer streams deal from real shoes, but operators typically cut off half the shoe or more and cap bets, which leaves counters with no meaningful edge, and they monitor bet patterns. Social casino apps use virtual chips, so there is no money to win in any case. Counting is a tool for physical shoe games with deep penetration, which is exactly the situation online casinos avoid offering. Read more →
Can you count cards against a continuous shuffling machine?
No. A CSM returns the cards from each round to the machine and mixes them back in, so the pool you are drawing from is always close to a full, fresh shoe. There is a tiny theoretical effect from the few cards in the machine's output buffer, but it is far too small to bet on. If the table has a CSM, play basic strategy and treat the game as unbeatable, or move to a table with a conventional shoe if your goal is to count. Read more →
How much of an edge does card counting give you?
Published estimates for a skilled Hi-Lo player in a six-deck game with decent rules and penetration are roughly 0.5% to 1.5% of the average bet, depending mostly on how widely you spread your bets and how deep the dealer deals. That is an average of perhaps £1 to £3 per £100 bet, earned through swings that are many times larger. It needs a bankroll of several hundred maximum bets to keep the risk of ruin low, which is why counting is a grind rather than a windfall. Read more →
What is the Illustrious 18?
The Illustrious 18 is Don Schlesinger's list, from his book Blackjack Attack, of the eighteen strategy deviations that capture most of the value available from changing your play with the count in Hi-Lo. The most valuable are taking insurance at a true count of +3 or more, standing on 16 against a 10 at 0 or higher, and standing on 15 against a 10 at +4. Each entry is an index number: above it you deviate from basic strategy, below it you do not. Learn them only after basic strategy and the count itself are automatic. Read more →
What is Wonging or back-counting?
Back-counting means standing behind a table, counting the cards without betting, and sitting down only when the count is favourable, then leaving when it drops. It is named after Stanford Wong, who popularised it. It raises a counter's average edge because they never play at a disadvantage, and it lets them use a smaller bet spread, which attracts less attention. Many casinos counter it with "no mid-shoe entry" signs that bar new players from joining until the next shuffle. Read more →
Do you need a photographic memory to count cards?
No. Nobody memorises which cards have gone. A counter keeps a single running number, adding one for small cards and subtracting one for tens and aces in Hi-Lo, then divides by the decks remaining. The difficulty is not memory but doing it accurately and invisibly for hours, at casino speed, while also playing basic strategy perfectly, sizing bets, chatting and watching for attention from the pit. Films exaggerate the memory and underplay the discipline and bankroll. Read more →

Casino play

Which is the best seat at a blackjack table?
Mathematically none. Your odds are identical in every seat because every card is equally likely to be dealt to any position. The seat that matters is the one that suits you: first base (the dealer's left) acts first and gets the least time to think; third base (the dealer's right) acts last and gets blamed, unfairly, for "taking the dealer's bust card". Card counters prefer third base because they see the most cards before deciding. Beginners often do best in the middle, away from the pressure at either end. Read more →
How much should I bet per hand?
A flat bet sized so that normal swings do not matter to you. A reasonable rule of thumb for a session is to bring at least 40 to 50 bets, since the standard deviation of a hand is more than a bet and losing streaks of five or six hands are routine. Under a house edge of around 0.5% your expected loss per hour at £10 a hand and 80 hands is only about £4, but the swings will be ten to twenty times that. No betting pattern changes the edge; only basic strategy and the table's rules do. Read more →
How do you tip a blackjack dealer?
Either hand the dealer a chip directly, or place a chip in front of your bet circle as a bet for the dealer; if your hand wins, the dealer's chip wins too and is collected. The bet is more customary and dealers tend to prefer it. Tipping is expected in the United States, where a chip or two every so often or on a good win is typical, and is less expected in the UK and Europe, where some casinos do not permit it at all. It is a courtesy, not a fee, and it does not affect the cards. Read more →
What are the hand signals in blackjack?
In a face-up shoe game: tap the table behind your cards to hit, wave a flat hand over them to stand, place an equal stack of chips beside (not on top of) your bet and hold up one finger to double, and place an equal stack beside your bet and hold up two fingers to split. In a hand-held game you scratch the cards on the felt to hit and tuck them under your bet to stand. Signals exist so the cameras can see your decision; most dealers will not act on a spoken instruction alone. Read more →
Should I ever take insurance?
Not unless you are counting cards. Insurance is a side bet that the dealer's hole card is a ten, paying 2:1. In a six-deck shoe with the ace showing, 96 of the other 311 cards are tens, a 30.9% chance, but 2:1 needs 33.3% to break even, so the bet loses about 7.4% of its value on average. It does not matter what your own hand is: insuring a 20 is just as bad as insuring a 12. Counters take it only when the true count is high enough that tens exceed a third of the remaining cards. Read more →
Should I take even money on a blackjack against an ace?
No, at a 3:2 table. Even money is insurance in disguise: you accept a guaranteed 1:1 instead of risking a push. In a six-deck shoe the dealer has a natural roughly 95 ÷ 309 ≈ 30.7% of the time once your ace and ten and the dealer's ace are removed, so declining is worth 1.5 × (1 − 0.307) ≈ 1.04 bets on average, against exactly 1.00 for taking even money. The difference is small but the direction is clear. At a 6:5 table the arithmetic flips and even money is correct. Read more →
Am I allowed to touch my cards?
In a shoe game, where cards are dealt face up, no: you signal with your hand and never touch the cards, your bet once the deal has begun, or the dealer's cards. In a single- or double-deck pitch game the cards are dealt face down and you pick them up with one hand only, keeping them over the table. Touching when you should not will draw a polite correction the first time and more than that if it continues; it is a security rule, not etiquette. Read more →
Do betting systems like the Martingale work in blackjack?
No. The Martingale (double after every loss) and its relatives rearrange when you win and lose but cannot change the expected value of a negative-expectation game, which is simply the house edge multiplied by the total amount bet. What they do change is the shape of the risk: many small wins followed by an occasional loss large enough to wipe them all out when a losing streak meets the table maximum or your bankroll. Nine consecutive losses are not rare over an evening, and a £10 Martingale would then need a £5,120 tenth bet. Read more →
What is a comp in a casino?
A comp is a complimentary meal, room, show ticket or other benefit a casino gives a player in proportion to their expected losses, calculated from their average bet, hours played and the house edge the casino assumes for the game. You earn comps by having your play rated with a player's card. They are a rebate on your expected loss, not a gift, and chasing them by betting more than you otherwise would costs more than they are worth. At a 0.5% game the casino usually rates blackjack players as if they lose considerably more. Read more →
How do I cash out and leave a blackjack table?
Wait until a hand has finished, then push your chips towards the dealer and ask to "colour up". The dealer exchanges your small chips for the fewest larger ones so the pit can see what leaves the table, and you carry those to the cashier's cage to exchange for cash. You cannot cash chips at the table. If you have a player's card, make sure it is returned and that the dealer notes your departure so your play is rated. A tip on the way out is customary in the United States. Read more →
Are blackjack side bets worth playing?
Not for value. Popular side bets such as 21+3 and Perfect Pairs carry house edges of roughly 3% to 10% or more depending on the paytable, many times the edge of the main game, and they pay only for your first two cards (and sometimes the dealer's upcard) so no strategy helps. If you enjoy the occasional large payout and treat the stake as entertainment, that is a legitimate choice; just do not confuse it with a way to make the game beatable. Reading the paytable before betting is the one skill that matters. Read more →

Online and apps

Is online blackjack rigged?
At a licensed operator, no: regulators such as the UK Gambling Commission require the random number generator to be independently tested and the published rules to be the rules the software plays. The house edge is already built into the rules, so there is no need to cheat. The real risks are unlicensed sites, which may do anything, and rule sets that are poor in plain sight, such as 6:5 payouts or restricted doubling. Check the licence, then read the rules exactly as you would at a physical table. Read more →
What is the difference between live-dealer and RNG blackjack?
RNG blackjack is software: cards are generated by a random number generator, effectively reshuffled every hand, and play is fast and solitary. Live-dealer blackjack streams a human dealing real cards from a real shoe in a studio, at the pace of a physical table, with the house edge set by the printed rules. Both are real-money gambling at a licensed casino. Neither is countable in practice: RNG games have no deck to track, and live games cut the shoe shallow and cap bets. Read more →
What is a social casino blackjack game?
A social casino game is played with virtual chips that have no cash value and cannot be withdrawn. You cannot win money and you cannot lose money beyond any optional in-app purchases of extra chips. It is a game, not gambling in the legal sense in most jurisdictions, which is why such apps can be offered on the App Store. Because the chips are free, the same basic strategy is correct and the odds behave in the same way, which makes a social casino a reasonable place to practise decisions before any real-money play. Read more →
Is the blackjack trainer on this site free?
Yes. The trainer and the strategy chart on this website are free, run in your browser and require no account, download or purchase. They use a single stated rule profile: six decks, dealer stands on soft 17, double on any two cards including after a split, no surrender, dealer peeks for blackjack and naturals pay 3:2. The trainer deals a hand, asks for your decision and explains the correct answer; the chart shows every decision at once. Both are separate from the Blackjack World Tour iOS game. Read more →

Blackjack World Tour

What is Blackjack World Tour?
Blackjack World Tour is a free iOS blackjack game played with virtual chips. It is a social casino: there are optional in-app purchases, but there is no real-money gambling, the chips have no cash value and nothing can be withdrawn. It is published on the App Store at https://apps.apple.com/app/id366459988. This website, including the free strategy chart and trainer, is a separate reference resource and does not require the app. Read more →
Can I win real money in Blackjack World Tour?
No. Blackjack World Tour is a social casino game played with virtual chips. You cannot deposit, wager or withdraw real money, and chips have no cash value. The app offers optional in-app purchases for additional virtual chips, which are a purchase of game content rather than a stake. If you want to play blackjack for money, that is real gambling at a licensed casino, subject to the age and legal restrictions where you live, and it is not something the app provides. Read more →
Where can I download Blackjack World Tour?
Blackjack World Tour is available for iPhone and iPad on the Apple App Store at https://apps.apple.com/app/id366459988. The download is free; it is a social casino game played with virtual chips, with optional in-app purchases and no real-money gambling. The strategy chart and trainer on this website are free to use in any browser and do not require the app to be installed. Read more →
Does the website trainer connect to the Blackjack World Tour app?
No. The trainer and strategy chart on this site are standalone web pages that run in your browser; they do not sign you in, award chips or exchange any data with the app. They exist so that anyone, whether or not they play Blackjack World Tour, can learn and drill basic strategy under a clearly stated rule profile. The app is a separate free iOS game played with virtual chips, available on the App Store. Read more →