Blackjack table

Hard 15 versus a dealer 10 is a hit in basic strategy; standing loses too often and doubling is not justified.

Hard 5 versus a dealer 4 is too weak to stand or double; hitting is the basic-strategy play so I can improve the hand with more than one card if needed.

Hard 10 is far too weak to stand against a dealer 4, and doubling is no longer legal, so the only correct play is to hit and try to improve.

Hard 14 versus a dealer 4 is a basic-strategy stand: the dealer is weak enough that busting by hitting is the bigger risk.

Hard 17 versus a dealer 5 is a clear stand: hitting or doubling risks busting a made hand that already beats the dealer’s weak upcard on average.

Soft 20 is already a strong total against a dealer 4, so standing avoids turning a likely winner into a worse hand.

Two jacks total 20 against a dealer queen. Standing is clearly best; splitting tens, hitting, or doubling would only risk a strong made hand.

Hard 18 versus a dealer King is a clear stand; hitting or doubling risks busting a strong total.

Hard 12 versus a dealer 7 should be hit under basic strategy; doubling a weak total is not justified.

Soft 15 against a dealer 9 is a hit in basic strategy; doubling is only correct versus much weaker upcards.

Soft 20 against a dealer 9 is already a strong total; hitting risks a worse hand or a bust, so standing is the clear play.

Hard 14 versus a dealer 4 is a stand in basic strategy: the dealer is weak, and hitting risks busting on a ten.

Hard 16 versus a dealer 5 is a stand in basic strategy: the dealer is weak and likely to bust, while hitting or doubling risks busting a made hand.

A pair of jacks totals 20 against a dealer 9, which is a strong made hand. Standing is clearly better than hitting, doubling, or splitting tens.

Hard 18 versus a dealer 7 is a clear stand; hitting or doubling risks a strong made hand.

Hard 16 versus a dealer 8 is a hit under basic strategy; standing loses more often and doubling is not justified.

Hard 17 against a dealer 8 is a clear stand; hitting or doubling risks busting on most cards with little upside.