Blackjack table

Standing on 15 against a dealer 2 is correct because the dealer is likely to make a hand and hitting risks busting with no gain.

Holding 20 against a dealer 10 is a strong made hand; splitting 10s or doubling would risk a winning position for no gain. Standing is the correct basic-strategy play.

Hard 17 is a made hand and the dealer shows a 6, a likely bust card, so standing maximizes expected value.

With 11 against a dealer 6, doubling is the optimal play to maximize expected value. The dealer is likely to bust with a 6 upcard, so I increase my bet while taking one more card.

Soft 15 vs dealer 3 is a basic strategy hit; doubling is not optimal against a low dealer upcard, and hitting cannot bust this soft hand.

Dealer upcard is 3, a low card, so standing on hard 12 is correct per basic strategy to avoid busting against a likely weak dealer hand.

Hard 20 is a very strong hand and the dealer's 8 upcard gives them a chance to bust; hitting or splitting would risk a winning hand for no gain.

With a hard 13 against a dealer 8, hitting is the correct basic strategy since the dealer is likely to make a hand and standing is too weak.

Standing on 19 against a dealer 8 is the correct basic strategy play, as hitting risks busting a made hand.

Hard 7 against a dealer 10 is a clear hitting hand; doubling is not profitable with such a low total.

With a total of 11, hitting is the best play to improve the hand without busting, especially against a dealer 10.

Hard 13 against a dealer 10 is a losing hand that needs improvement; hitting gives the best chance to reach a safe total without exceeding 21 too often.

Holding a 20 against a dealer Jack, standing is the optimal play since drawing risks busting and yields no improvement.

Standing on 13 against a dealer 2 is correct basic strategy; the dealer is weak and likely to bust or make a low total. Hitting risks busting for little gain.

With a hard 14 against a dealer 10, hitting gives the best chance to improve while standing is too weak. Doubling is not advisable with this total.

Standing on 20 is the optimal play against a dealer 3, as splitting tens would sacrifice a strong made hand.

Hard 13 against a dealer Ace is a losing hand; hitting gives the best chance to improve to a safe total, while standing is too weak and doubling is not justified.

Hard 14 against a dealer Ace is a losing hand; hitting gives the best chance to improve to 17 or better before the dealer's strong upcard is resolved.

With a hard 16 against a dealer Ace, hitting is the correct basic strategy play to improve the chance of beating the dealer's likely strong hand.

Standing on 19 against a dealer Jack is the correct basic strategy play, as hitting risks busting and doubling is not profitable here.

With 11 against a dealer 8, doubling maximizes expected value by getting one more card at the best possible total while the dealer is likely to need to improve.

Hard 12 against a dealer 9 is a losing hand that needs improvement, so hitting gives the best chance to avoid busting while trying to beat the dealer's likely made hand.

Splitting 6s is only advisable against dealer 2 through 6; against an Ace, the dealer is too strong, so hitting gives the best chance to improve the 12.

Hard 13 against a dealer Ace is weak; hitting gives a chance to improve while standing risks losing to a likely dealer 17 or better.

Hard 17 vs dealer Ace: hitting risks busting (61.5% of cards bust), and dealer stands on soft 17, so standing gives a chance to push or win if dealer busts.