Blackjack table

Hard 18 against a dealer 10 is a stand in basic strategy. Hitting or doubling risks busting for little gain.

A hard 7 against a dealer 8 is too weak to stand or double. Basic strategy says hit.

A hard 9 cannot bust on the next card, and doubling is no longer allowed. Hitting is clearly correct against the dealer's 8.

A hard 11 cannot bust on one more card, and doubling isn't available with four cards, so hitting is clearly correct against a dealer 8.

Basic strategy says to hit a hard 14 against a dealer 8, since standing on 14 loses too often against a strong upcard. The many low cards already dealt are a minor consideration and don't change the play.

Basic strategy for 6 decks with the dealer standing on soft 17 says to stand on soft 19 against a 4. Doubling A-8 only comes into play against a 6 under H17 rules.

Basic strategy says to hit a hard 12 against a dealer 9. The dealer is strong, so standing loses more often than risking a bust.

A hard 5 against a dealer 4 is always a hit under basic strategy. No card can bust it, and doubling on such a low total has negative value.

Basic strategy for a hard 12 against a dealer 4 is to stand, because the dealer's bust chance is high. Hitting risks busting on any ten-value card.

Under basic strategy for 6 decks with the dealer standing on soft 17 and peeking for blackjack, soft 18 against an Ace is a stand. Hitting or doubling does not improve the expected result here.

Basic strategy says to stand on hard 13 against a dealer 5. The dealer busts often from a weak upcard, so I shouldn't risk busting.

Under basic strategy, a hard 10 against a dealer 3 is a double. The dealer's weak upcard gives the double higher expected value than hitting.

Hard 16 against a dealer 6 is a basic-strategy stand. The dealer's bust chance is high, so taking a card and risking a bust is worse.

Soft 19 against a dealer 10 is a stand under basic strategy. Hitting or doubling would only weaken a strong total.

Basic strategy says to hit a hard 7 against a dealer 3. Doubling or standing on 7 is clearly worse.

Basic strategy says to stand on a hard 13 against a dealer 3, since the dealer's bust chance is high enough to make hitting worse.

Basic strategy splits 9,9 against a dealer 5, since the dealer is weak and double after split is allowed, making this more profitable than standing on 18.

A hard 19 against a dealer 5 is a clear stand. The dealer has a high chance of busting, and hitting or doubling would risk the hand for no gain.

Basic strategy says to stand on hard 12 against a dealer 5, since the dealer's bust chance is high. Hitting or doubling would risk busting needlessly.

Hard 17 against a dealer 9: basic strategy is to stand, since hitting risks busting far more often than it improves the hand.

Hard 17 against a dealer Ace calls for a stand under basic strategy in S17 with no surrender. Hitting risks busting too often.

Basic strategy says to hit a hard 8 against a dealer 7. Doubling isn't favorable here and standing on 8 is clearly worse.

Hard 18 against a dealer 7 is a clear stand under basic strategy. Hitting risks a bust, and 18 already beats or ties most of the dealer's likely outcomes.

Hard 11 against a dealer 7 is a standard double under basic strategy (6 decks, S17), and doubling has the highest expected value here.