Blackjack table

Hard 17 is a made hand and hitting risks busting; standing is the correct basic strategy against a dealer 7.

Standing on 17 against a dealer 5 is correct because the dealer is likely to make a low total or bust, and hitting risks breaking a made hand.

Hard 20 is a strong made hand; standing maximizes expected value against a dealer 10 upcard.

With a hard 16 against a dealer 6, the dealer is likely to bust, but standing on 16 is risky. Hitting gives a chance to improve to a stronger hand, and the dealer's upcard is weak, so taking a hit is the better play.

Hard 12 against a dealer 9 is a losing hand; hitting gives the best chance to improve, while standing loses too often and doubling is too risky with a high bust chance.

With 11 against dealer 4, doubling down is the optimal basic strategy play to maximize expected value.

With 15 against a dealer 4, basic strategy favors standing since the dealer is likely to bust or make a low total.

Standing on hard 15 vs dealer 3 follows basic strategy and preserves the best expected value; hitting or doubling would risk a worse outcome.

Hard 13 against dealer 5 is a stand in basic strategy because the dealer is likely to bust.

Hard 12 against a dealer king is a losing hand; hitting gives the best chance to improve to 17 or better before the dealer's strong upcard.

Hard 14 against a King is a losing hand; hitting gives a chance to improve to 17 or better, while standing almost certainly loses to the dealer's likely 17-21.

With a hard 9 against dealer's 5 upcard, doubling is the basic strategy play because the dealer is likely to bust and my chance to draw a strong card is favorable.

Hard 19 is a strong hand against a dealer 10 upcard; hitting risks busting and doubling is not advantageous. Standing maximizes expected value.

Soft 19 is a strong made hand against a dealer 9; hitting risks busting or reducing the hand, and doubling is not advisable. Standing maximizes expected value.

Hard 8 against a dealer 9 is a losing hand, so standing or doubling is not viable. Splitting 4s vs 9 is also weak, so hitting gives the best chance to improve.

With a hard 12 against a dealer 9, hitting gives the best chance to improve before the dealer's strong upcard.

Against a dealer Ace, a hard 12 is too weak to stand on and too weak to double, so hitting gives the best chance to improve without busting too often.

Hard 17 against dealer Ace: hitting busts too often with many 5+ cards remaining, and standing is the higher-EV play against a dealer who stands on soft 17.

Hard 5 against a dealer 10 is a clear hitting hand; doubling is far too risky with such a low total.

Total 10 is far too low against a dealer 10; hitting gives a good chance to improve to a competitive total, while standing almost certainly loses.

With a hard 12 against a dealer 10, hitting gives the best chance to improve or avoid busting versus standing on a likely dealer 20.

Total 19 is strong against a dealer 10 upcard; hitting risks busting with little gain, so standing is the correct play.

Dealer shows a 6, a bust card, so standing on 12 is the correct basic strategy play.