Online Blackjack Basic Strategy and Strategy Charts Guide

A practical guide to online blackjack basic strategy for UK players. Learn how to read charts for hard, soft, and pair hands, and debunk key myths.

A blackjack hand can offer up to five choices, and basic strategy tells you which one has the best long-run return against each dealer upcard. This page gives complete charts for hard, soft and paired hands, shows how to adjust them for the rules at your table and tests five popular beliefs against the numbers.

Where Basic Strategy Comes From and What It Delivers

Basic strategy is the set of plays that gives the best expected result for every starting hand against every dealer upcard. Four authors, Roger Baldwin, Wilbert Cantey, Herbert Maisel and James McDermott, published the first sound version in 1956 under the title “The Optimum Strategy in Blackjack”. Edward O. Thorp checked their work by computer and took it further in Beat the Dealer.

Followed without mistakes at a six or eight-deck table that pays 3:2, it shrinks the casino’s advantage to about 0.4% to 0.7%, among the smallest anywhere on the gaming floor. It cannot remove that advantage, and no chart can promise a winning session, because short runs of cards decide those. What it does guarantee is that you never give away more than the table’s own rules already take. The payouts, table rules and house edge guide shows how the rules set that figure.

The Chart Codes Explained

To use a chart, pick your hand from the first column, pick the dealer’s upcard from the top row and take the code where the two cross. All three charts use the same eight codes:

All three charts were calculated for one setup: four to eight decks, a dealer who hits soft 17 (H17), double after split (DAS), late surrender and a dealer who checks for blackjack before you act. Tables that differ need the changes listed further down, and the buttons themselves are explained in the player actions guide.

Hard Hands: Hit, Stand or Double?

A hard hand contains no Ace, or contains one that has to count as 1. The awkward totals run from 12 to 16. When the dealer shows a 2 to 6, the upcards most prone to busting, stand on 13 to 16, and on 12 only against a 4, 5 or 6. When the dealer shows a 7 or more, take a card, unless the chart tells you to surrender. Hard 10 and 11 are your best doubling hands.

Two entries deserve to be memorised. Hard 11 is a double against every upcard on this chart, an Ace included. Hard 16 against a 9, 10 or Ace is a surrender if the table has one and a hit if it does not.

Soft Hands: Making the Most of the Ace

In a soft hand the Ace is being counted as 11. Since it can fall back to 1, a single extra card can never bust you, so soft hands are the ones to play boldly, above all against a dealer 4, 5 or 6.

A,7 (soft 18) catches many players out. Double it against a 2 to 6, stand on it against a 7 or 8 and hit it against a 9, 10 or Ace. Where doubling is unavailable, treat Ds as a stand and Dh as a hit.

Pairs: Split or Keep?

You can play a pair as one hand or divide it into two, each carrying its own stake. This chart settles the choice for every pair.

Aces and 8s are always split. Two Aces give you two chances to build on an 11, and splitting 8s breaks up a hard 16, the weakest total in the game. The only wrinkle is 8,8 against a dealer Ace, which is a surrender if the table offers one and a split if it does not.

If Your Table’s Rules Differ From the Charts

Most online tables match the assumptions above. If yours does not, these changes are all you need:

Tables with no hole card, such as European Blackjack, call for a chart of their own, because doubling or splitting against a 10 or an Ace exposes extra chips to a dealer natural. The reason is explained in rule variations and regional games.

Four Habits for the Table When You Have No Chart

• Split every pair of Aces and 8s. Aces start two hands from 11, and splitting 8s escapes a weak 16.
• Keep every pair of 10s and 5s. Two 10s already make 20, and two 5s make a hard 10, which is better doubled.
• Double hard 11 against a dealer 2 to 10. A 10-value card, the likeliest draw, gives you 21.
• Decline insurance and even money. In a six-deck game each one costs roughly 7.4% of the amount wagered on it.

Why the Charts Are an Average: Composition-Dependent Play

These charts are total-dependent: they read your total and whether the hand is hard, soft or a pair, and ignore which cards built it. A composition-dependent player studies the actual cards. Take hard 12 against a dealer 4 in a single-deck game. The chart says stand, yet when the 12 is a 10 and a 2, drawing a card comes out marginally ahead, because your own 10 has already left the pack and made a bust less likely.

The benefit is very small, about 0.036% with a single deck and about 0.003% with six, and that is why total-dependent charts remain the working standard online.

Five Blackjack Myths, Tested Against the Numbers

Some popular beliefs lead beginners into costly habits, and every one of them fails when it meets the real odds.

Myth 1: A Dealer Bust Is Overdue

Cards have no memory, and each hand is independent of the last. Someone who refuses to hit any hard total of 12 or more, waiting for the dealer to bust, gives the house an edge of about 3.91%.

Myth 2: Playing Like the Dealer Is Safe

Mimicking the dealer means hitting to 17 and never doubling or splitting. That throws away the one thing a player has going for them, a free choice, and since you act first a double bust still goes to the house. Expect a cost of about 5.48%.

Myth 3: The Hidden Card Is a Ten

Ten-value cards are the most common value in the pack, but they are still only four cards in every 13. Acting as though each hole card were a ten drives the house edge up to about 10.03%.

Myth 4: A Betting System Beats the Edge

Betting progressions, the Martingale (double the stake after every loss) being the best known, only rearrange how wins and losses arrive. The odds on each hand stay where they were. A long run of defeats can drain the bankroll, or hit the table maximum, before the system has won anything back.

Myth 5: Card Counting Works Online

Counting relies on a shoe that is dealt down across many hands. An RNG table shuffles again before every hand, and a live table either uses a continuous shuffler or reshuffles long before the shoe runs low. See live dealer and RNG formats for how each one shuffles and deals.

Keep Learning: Variants, Basics and the Full Guide List

Because the charts assume standard rules, variants and regional games shows what changes in special games. If scoring is still hazy, how to play online blackjack covers it from the start, and the blackjack hub lists every guide in the series. Blackjack costs money in the long run, so hold yourself to a session budget, and use our safer gambling page if you would like help with that.

Author:

Lucas Portela

Owner, BoldGambler • Avanhandava/SP

Oddsmaker, affiliate and content creator in the iGaming industry.

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