Blackjack basic strategy

You hold ten–six against a dealer ten. Hitting can bust; standing leaves a vulnerable sixteen. Basic strategy answers the difficult question: which legal action has the best expected result, given the information and rules? It does not make the hand comfortable or reveal the next card.

Our chart uses total-dependent basic strategy for six decks, dealer stands on soft seventeen, doubling after splitting, no surrender and US peek. It is the same versioned decision engine used by the trainer. Match that profile to the game before applying its answers.

Use the chart in the right order

First ask whether the hand is an eligible pair. If splitting is available, consult the pairs table. When that table recommends keeping the pair, its action already accounts for playing it as a total. Next distinguish soft from hard hands: a soft hand has an ace currently counted as eleven. Finally find the dealer’s upcard across the top.

This hierarchy prevents a common mistake. Eight–eight and ten–six both total sixteen, but only the first offers a useful split. Ace–seven and ten–eight both total eighteen, but only the first has ace flexibility. The total alone does not identify the decision.

Learn the structure before every cell

The hard-total decisions form a compact framework. With eight or less, hit. With nine, double against three through six when allowed; otherwise hit. With ten, double against two through nine. With eleven, double against two through ten. The remaining eleven-against-ace decision is a hit under these S17 rules.

Hard twelve stands against four through six and hits elsewhere. Hard thirteen through sixteen stand against two through six and hit against seven through ace. Hard seventeen or more stands. Pair decisions can override these totals, so apply the hierarchy first.

Soft hands have their own pattern, explored in the soft-hands guide. Low soft totals keep drawing unless a double is preferred. Soft eighteen mixes all three choices: stand against two, seven or eight; double against three through six; hit against nine, ten or ace. Soft nineteen and twenty stand here.

These decisions agree with the S17 recommendations in Michael Shackleford’s four- to eight-deck reference after accounting for our lack of surrender. BlackjackInfo’s configurable engine also makes the rule inputs explicit.

Understand why safe-looking moves can be worse

Standing cannot bust your hand. That does not make it the best action: the dealer can still beat your total. Conversely, a double can leave you with an unimpressive final hand while still being the preferred choice before the card arrives.

Expected return compares the average payoff of actions over possible outcomes. It includes losses, wins, pushes and additional stakes. It differs from the chance of winning a hand. Splitting may be preferred because it reduces an expected loss, rather than because it turns a bad starting hand into a profitable one.

The Wizard of Odds expected-return tables illustrate this comparison. Those tables use an infinite-deck model; their numbers should not be presented as exact six-deck figures. Here, the practical lesson is to compare actions before observing the result.

Apply the fallback when an action disappears

A double needs exactly two cards. If the chart says double and that action is unavailable, hit on hard nine, ten or eleven and soft seventeen or below. On soft eighteen, stand instead. Thus ace–three–four against five stands, even though two-card ace–seven against five doubles.

When the four-hand split limit has been reached, an ordinary pair must be treated as a hard or soft total. Eight–eight against six then stands as hard sixteen. Split aces are already complete after their one additional card, so there is no new decision to obtain from the chart.

Natural blackjack, a stood or doubled hand, and any total of 21 or more also end the decision. A table is a guide to playable states, not permission to take an action the rules forbid.

Know where basic strategy stops

Total-dependent strategy classifies non-pair hands by their total and softness. It does not track which ranks remain in the shoe. Composition-dependent analysis can distinguish hands with the same total; card-counting deviations use additional information about remaining cards. Neither is part of this trainer.

Changing the rules is different from making a counting deviation. H17, surrender, restrictions on doubling or a no-hole-card procedure require an appropriate strategy. “I remember this from another chart” is a reason to check the profile, not to blend the charts.

Practise decisions you can explain

Start with hard totals, then add soft totals and pairs. Practise neighboring cases together: twelve against three and four; ace–seven against eight and nine; nine–nine against seven and eight. Explaining the boundary is more useful than repeatedly answering hands you already know.

After an error, identify whether you misclassified the hand, misread the upcard, forgot a rule or chose the wrong cell. After a correct decision loses, keep the correct decision. A run of outcomes is not a new strategy rule.

Strategy chart

Read the pair table first when splitting is available, then the soft or hard table. H means hit, S stand, D double and P split. Use the fallback above when doubling is unavailable. Tables scroll horizontally on smaller screens.

Choose the pair table first for a splittable pair, then soft or hard totals. H = hit, S = stand, D = double, P = split. If doubling is unavailable, hit; for soft 18, stand instead. Select any cell for the reasoning behind it.

H · HitS · StandD · DoubleP · Split