# Blackjack World Tour

> A blackjack reference from the makers of the Blackjack World Tour iOS game: rules, basic strategy for six decks with the dealer standing on soft 17, every two-card decision explained, dealer odds, card counting, history and sourced guides to real casino blackjack in eight world cities. Blackjack World Tour itself is a free social casino game played with virtual chips; it offers in-app purchases and no real-money gambling.

Strategy profile for all decisions unless stated: six decks, dealer stands on soft 17, double any two cards including after splits, split to four hands, split aces receive one card, no surrender, US peek, blackjack pays 3:2. Text may be quoted with attribution. Sources are listed on each page.

## Core guides
- [Blackjack rules](https://blackjackworldtour.app/learn/blackjack-rules/): Card values, the order of play, payouts and the table rules that change your decisions.
- [Blackjack basic strategy](https://blackjackworldtour.app/learn/basic-strategy/): How to read a blackjack chart, understand its logic and practise without confusing a good decision with a lucky result.
- [Soft hands](https://blackjackworldtour.app/learn/soft-hands/): Why soft seventeen keeps drawing, soft eighteen has three answers and an ace can turn a hand hard.
- [Splitting pairs](https://blackjackworldtour.app/learn/splitting/): The full pair strategy, the logic behind eights and nines, and the limits that change a split decision.
- [Doubling down](https://blackjackworldtour.app/learn/doubling-down/): Hard and soft doubles, the one-card commitment, and the rule changes that alter the decision.
- [Insurance and even money](https://blackjackworldtour.app/learn/insurance/): A separate bet on the dealer's hole card, a one-third break-even point, and the arithmetic behind even money.
- [Surrender](https://blackjackworldtour.app/learn/surrender/): Understand the minus-half-unit threshold, late versus early surrender, and why a pair of eights needs its own decision.
- [Bankroll and variance](https://blackjackworldtour.app/learn/bankroll-and-variance/): Separate expected cost from session swings, price extra wagers, and understand why betting progressions cannot repair the odds.
- [Card counting](https://blackjackworldtour.app/learn/card-counting/): What Hi-Lo measures, why a running count needs a deck estimate, and where counting differs from basic strategy and streak chasing.
- [Choosing a blackjack table](https://blackjackworldtour.app/learn/choosing-a-table/): Read payouts, dealer rules, betting limits and the small print that changes a blackjack game.
- [Live casino etiquette](https://blackjackworldtour.app/learn/casino-etiquette/): A practical first-seat guide to buying chips, handling cards and making your decisions clear.
- [The blackjack glossary](https://blackjackworldtour.app/learn/glossary/): One hundred and twelve terms for reading a hand, a rule sign, a strategy chart, a counting system and the mathematics behind the game.

## Tools and indexes
- [Basic strategy chart](https://blackjackworldtour.app/strategy-chart/): all 340 hard, soft and pair decisions in three tables.
- [Every hand, answered](https://blackjackworldtour.app/hands/): one page per two-card hand and dealer upcard, e.g. /hands/hard-16-vs-10/ or /hands/pair-of-8s-vs-10/, with reasoning.
- [Strategy trainer](https://blackjackworldtour.app/trainer/): ten-hand practice with explanations.
- [FAQ](https://blackjackworldtour.app/faq/): 89 short answers grouped by topic.
- [Basic strategy as JSON](https://blackjackworldtour.app/data/basic-strategy.json): machine-readable decisions for the stated profile.
- [Dealer outcome probabilities](https://blackjackworldtour.app/data/dealer-outcomes.json), [bust-on-hit probabilities](https://blackjackworldtour.app/data/player-bust-on-hit.json), [blackjack probability by deck count](https://blackjackworldtour.app/data/blackjack-probability.json).
- [Full text index](https://blackjackworldtour.app/llms-full.txt): every guide in one plain-text file.

## Rules & variants
- [How rule variations change the house edge](https://blackjackworldtour.app/rules/how-rule-variations-change-the-house-edge/): A reference table of common blackjack rule variations and their approximate effect on the house edge, with a worked method for adding them to a baseline.
- [H17 vs S17: dealer hits or stands on soft 17](https://blackjackworldtour.app/rules/h17-vs-s17/): What changes when the dealer hits soft 17, how much it costs the player, and the exact basic-strategy cells that flip in a multi-deck game.
- [6:5 blackjack vs 3:2: what the payout costs](https://blackjackworldtour.app/rules/6-5-blackjack-vs-3-2/): Worked payout arithmetic for 6:5 and 3:2 blackjack, the exact house-edge cost of the short payout, and how to spot it on the felt before you sit.
- [European no-hole-card rules (ENHC and OBO)](https://blackjackworldtour.app/rules/european-no-hole-card-rules/): How no-hole-card blackjack works, the difference between ENHC, OBO, OBBO and BB+1 settlement, what it costs, and which doubles and splits to abandon.
- [Deck count: single-deck vs multi-deck blackjack](https://blackjackworldtour.app/rules/deck-count-single-vs-multi/): Why fewer decks lower the house edge, a table of edge by deck count, how casinos claw it back with 6:5 and tighter rules, and what penetration means.
- [Double and split rule variations](https://blackjackworldtour.app/rules/double-and-split-rule-variations/): How doubling restrictions, double after split, resplitting and split-ace rules change the house edge, and which basic-strategy cells each rule moves.
- [Spanish 21: rules, bonuses and house edge](https://blackjackworldtour.app/rules/spanish-21/): How Spanish 21 works without tens, what its bonuses and double-down rescue are worth, its house edge by rule set, and how its strategy differs from blackjack.
- [Blackjack Switch: rules, edge and switching strategy](https://blackjackworldtour.app/rules/blackjack-switch/): How Blackjack Switch lets you swap cards between two hands, what the push-22 and even-money blackjack rules cost, the house edge, and when to switch.
- [Free Bet Blackjack: rules, edge and strategy](https://blackjackworldtour.app/rules/free-bet-blackjack/): How Free Bet Blackjack's free doubles and free splits work, what the push-22 rule costs, the house edge under common rules, and how strategy changes.
- [Pontoon and Australian blackjack](https://blackjackworldtour.app/rules/pontoon-and-australian-blackjack/): British Pontoon with twist, stick and buy; Australian casino Pontoon derived from Spanish 21; and Australian no-hole-card blackjack with BB+1 and OBBO rules.
- [Double Exposure and other blackjack variants](https://blackjackworldtour.app/rules/double-exposure-and-other-variants/): Double Exposure, Super Fun 21 and Blackjack Plus: what each variant changes, what it gives back, and the house edge where it has been measured.

## Odds & maths
- [Dealer bust probability by upcard](https://blackjackworldtour.app/odds/dealer-bust-probability-by-upcard/): How often the dealer busts or finishes on 17–21 for each upcard 2 to ace, with the full six-deck S17 table and why 5 and 6 are the weakest upcards.
- [Player bust probability when hitting](https://blackjackworldtour.app/odds/player-bust-probability-when-hitting/): The chance of busting when you hit each hard total from 12 to 20, shown as exact infinite-deck fractions, and how it combines with the dealer's bust odds.
- [Probability of being dealt a blackjack](https://blackjackworldtour.app/odds/probability-of-blackjack/): Exact odds of a natural 21 in single, double, six and eight-deck games, the chance the dealer also has one, and why the deck count changes the answer.
- [How the blackjack house edge is calculated](https://blackjackworldtour.app/odds/how-the-house-edge-is-calculated/): What house edge and element of risk mean, how dealer busts, 3:2 naturals, doubling and splitting combine into about 0.4% under six-deck S17 DAS rules.
- [Expected value of hard 16 vs 10](https://blackjackworldtour.app/odds/expected-value-of-hard-16-vs-10/): Published expected values for hitting, standing and surrendering hard 16 against a dealer 10, why hitting is least bad, and when a three-card 16 stands.
- [Standard deviation and risk of ruin](https://blackjackworldtour.app/odds/standard-deviation-and-risk-of-ruin/): The per-hand standard deviation of blackjack (about 1.14 units), how expectation and spread scale with hands played, and risk-of-ruin model outputs.
- [Composition-dependent exceptions to basic strategy](https://blackjackworldtour.app/odds/composition-dependent-exceptions/): The best-known hands where the cards making up a total change the correct play, such as three-card 16 vs 10 and 10+2 vs 4, with sources and what they are worth.
- [Insurance and even money maths](https://blackjackworldtour.app/odds/insurance-and-even-money-maths/): Why insurance pays 2:1 against true odds near 2.2:1, its exact house edge in single and six-deck games, why even money is the same bet, and when to take it.
- [How basic strategy is derived](https://blackjackworldtour.app/odds/how-basic-strategy-is-derived/): How basic strategy is computed by comparing expected values, from Baldwin's 1956 paper and Thorp's IBM 704 work to modern engines, and why rules change it.

## Card counting
- [Hi-Lo card counting tutorial](https://blackjackworldtour.app/counting/hi-lo-card-counting-tutorial/): Learn the Hi-Lo count: the three tag values, cancelling pairs, a deck-countdown drill, what the running count means and a full dealt round counted card by card.
- [True count conversion explained](https://blackjackworldtour.app/counting/true-count-conversion/): How to turn a running count into a true count: divide by decks remaining, estimate the discard tray, pick a rounding convention and apply it to bets and plays.
- [Card counting systems compared](https://blackjackworldtour.app/counting/card-counting-systems-compared/): Hi-Lo, KO, Hi-Opt I and II, Omega II, Zen, Red 7 and Wong Halves side by side: tag values, level, balance, ace treatment and verified efficiency figures.
- [Illustrious 18 index plays](https://blackjackworldtour.app/counting/illustrious-18-index-plays/): Don Schlesinger's Illustrious 18 and Fab 4 for Hi-Lo: the true-count indices in a table, what an index means and which deviations are worth the most.
- [Bet spreads and bankroll for counters](https://blackjackworldtour.app/counting/bet-spreads-and-bankroll-for-counters/): How counters size bets: ramps keyed to true count, 1-8 and 1-12 spreads, the Kelly idea, risk of ruin, bankroll rules of thumb and why cover matters.
- [Casino countermeasures and legality](https://blackjackworldtour.app/counting/casino-countermeasures-and-legality/): Is card counting legal, can a casino bar you, and what casinos do about counters: shuffles, CSMs, flat-bet rules, no mid-shoe entry and device laws.
- [Advanced advantage techniques](https://blackjackworldtour.app/counting/advanced-advantage-techniques/): Shuffle tracking, ace sequencing, hole carding and edge sorting at a high level, with the Phil Ivey cases and where courts separate skill from cheating.
- [The MIT Blackjack Team](https://blackjackworldtour.app/counting/the-mit-blackjack-team/): The documented MIT Blackjack Team history from 1979: Kaplan and Massar, spotter and big player roles, Strategic Investments, and what the book and film changed.

## World tour
- [Blackjack rules around the world compared](https://blackjackworldtour.app/destinations/blackjack-rules-around-the-world/): How casino blackjack rules differ between Las Vegas, Atlantic City, London, Macau, Monaco, Paris, Singapore and Sydney, with sourced house-edge effects.
- [Blackjack in London: rules, venues and etiquette](https://blackjackworldtour.app/destinations/london/): What to expect at a London blackjack table: the 2005 Gambling Act, walk-in casinos, published Hippodrome rules, major venues and how British etiquette differs.
- [Blackjack in Macau: the baccarat capital](https://blackjackworldtour.app/destinations/macau/): Macau is the world's largest casino market by revenue, but baccarat dominates. What that means for blackjack availability, rules, minimums, age and venues.
- [Blackjack at the Casino de Monte-Carlo](https://blackjackworldtour.app/destinations/monaco/): The Monte-Carlo Casino's published blackjack rules, entry fee, dress code, age limit, the ban on Monaco residents and the SBM casino's history since 1865.
- [Blackjack in Paris: clubs de jeux and Enghien](https://blackjackworldtour.app/destinations/paris/): Paris has had legal blackjack only since 2018, in clubs de jeux made permanent in 2026, plus the Enghien-les-Bains casino. Rules, venues, law and age limit.
- [Blackjack in New York: city, upstate and Atlantic City](https://blackjackworldtour.app/destinations/new-york/): Real blackjack for New Yorkers: Resorts World's live tables since April 2026, the three downstate licences, upstate casinos and Atlantic City rules.
- [Blackjack in Singapore: two casinos, one rulebook](https://blackjackworldtour.app/destinations/singapore/): Marina Bay Sands and Resorts World Sentosa under the Casino Control Act: the S$150 entry levy, regulator-approved blackjack rules, age limit and high minimums.
- [Blackjack in Sydney: Crown, The Star and pontoon](https://blackjackworldtour.app/destinations/sydney/): Real blackjack in Sydney: Crown Sydney's published rules, The Star's suspended licence, the NSW regulator, Australian no-hole-card conventions and pontoon.

## History & culture
- [History of blackjack](https://blackjackworldtour.app/history/history-of-blackjack/): How twenty-one travelled from Cervantes's Seville and 18th-century France to Nevada, and how the 1956 and 1962 maths turned it into modern blackjack.
- [The Four Horsemen of Aberdeen](https://blackjackworldtour.app/history/the-four-horsemen-of-aberdeen/): How four US Army enlisted men with desk calculators computed the first correct blackjack basic strategy and published it in a statistics journal in 1956.
- [Edward Thorp and Beat the Dealer](https://blackjackworldtour.app/history/edward-thorp-and-beat-the-dealer/): How a young MIT mathematician used an IBM 704, a gambler's bankroll and the Ten Count to prove blackjack beatable in 1962, and what the casinos did about it.
- [Blackjack in film and books](https://blackjackworldtour.app/history/blackjack-in-film-and-books/): What Rain Man, 21, The Hangover, Croupier and The Last Casino get right and wrong about blackjack, and the six books that actually taught the game.
- [Famous blackjack players](https://blackjackworldtour.app/history/famous-blackjack-players/): Sourced profiles of Ken Uston, Stanford Wong, Peter Griffin, Arnold Snyder, Tommy Hyland, Don Johnson and Max Rubin, plus the Blackjack Hall of Fame at Barona.
- [How casino blackjack rules evolved](https://blackjackworldtour.app/history/how-casino-blackjack-rules-evolved/): From hand-dealt single decks to eight-deck shoes, 6:5 naturals, continuous shufflers, side bets and H17: what each rule change did to the house edge.

## At the table
- [Betting systems debunked](https://blackjackworldtour.app/playing/betting-systems-debunked/): How Martingale, Paroli, D'Alembert, Fibonacci, Oscar's Grind and 1-3-2-6 work, with worked sequences and the arithmetic showing why none changes expected value.
- [Eight blackjack myths, corrected](https://blackjackworldtour.app/playing/blackjack-myths/): Third base, the dealer's bust card, assuming a ten, insurance, hot dealers, due tables and card-counting legality, each corrected with arithmetic or a source.
- [How a shoe game is dealt](https://blackjackworldtour.app/playing/how-a-shoe-game-is-dealt/): Casino blackjack procedure: shoe versus pitch games, cut and burn cards, dealing order, the dealer's peek, no-hole-card play, doubles, splits and settlement.
- [Live dealer, RNG and social casino blackjack](https://blackjackworldtour.app/playing/live-dealer-vs-rng-vs-social-casino/): Live-dealer streams, random-number-generator software and virtual-chip social casino apps compared on rules, pace, stakes and whether counting is possible.
- [Blackjack tournament strategy](https://blackjackworldtour.app/playing/blackjack-tournament-strategy/): How elimination blackjack tournaments work and the betting logic that wins them: position, relative bankroll, catch-up bets and final-hand arithmetic.
- [Blackjack side bets explained](https://blackjackworldtour.app/playing/side-bets-explained/): Rules and house edges for 21+3, Perfect Pairs, Lucky Ladies, Royal Match, Bust Bonus, Buster Blackjack, Lucky Lucky and insurance, and why the edges are high.
- [Blackjack hand signals](https://blackjackworldtour.app/playing/blackjack-hand-signals/): The exact signals for hit, stand, double, split and surrender in face-up shoe games and face-down pitch games, why casinos require them, and chip placement.
- [Managing tilt and responsible play](https://blackjackworldtour.app/playing/managing-tilt-and-responsible-play/): How variance drives loss chasing and tilt at the blackjack table, why winning it back is a fallacy, practical stop-loss and time limits, and where to find help.

## About the game
- [Blackjack World Tour on iOS](https://blackjackworldtour.app/game/): what the app is and how it relates to this reference.
- [Where to play](https://blackjackworldtour.app/play/): the app, the free trainer and live casino play compared.
- [Las Vegas blackjack guide](https://blackjackworldtour.app/play/las-vegas/): a sourced shortlist of Las Vegas tables.