Blackjack table

Basic strategy says to double soft 16 (A,5) against a dealer 6, since the dealer is at their weakest. Doubling is legal on any first two cards here.

Hard 18 against a dealer 2 is a standard stand under basic strategy. Hitting or doubling would only risk busting a strong total.

Soft 20 against a dealer 10 is a clear stand under basic strategy. Hitting or doubling would only weaken a strong total.

Basic strategy for soft 16 against a dealer 9 is to hit; doubling is only correct against dealer 4-6. Hitting can't bust a soft 16 and improves a weak total.

Hard 20 against a dealer 8 is a strong made hand, so standing is correct basic strategy. Splitting tens would give up a very favorable position.

Basic strategy says to stand on a hard 14 against a dealer 3. The dealer has a good chance of busting, and hitting risks busting first.

Hard 20 against a dealer 5 is a strong made hand. Basic strategy says stand rather than split tens, since standing has the higher expected value.

A hard 13 against a dealer 6 is a basic-strategy stand. The dealer busts often from a 6, so I shouldn't risk busting by hitting.

Basic strategy says to hit a hard 13 against a dealer 10. Standing does worse against a strong upcard, especially since the dealer has already peeked and has no blackjack.

Hard 20 against a dealer 10 is a clear stand, since any hit except an ace busts.

Basic strategy says to stand on a hard 14 against a dealer 6. The dealer's bust chance is high, so taking no risk is best.

Under basic strategy, hard 9 against a dealer 8 is a hit. Doubling on 9 only pays off against dealer 3 through 6.

Basic strategy says to hit a hard 16 against a dealer 8, since the dealer's strong upcard makes standing lose more often than hitting.

A hard 20 against a dealer 8 is a clear stand. Hitting risks busting for almost no gain.

Basic strategy for a hard 13 against a dealer 9 is to hit, because standing on 13 loses too often to the dealer's likely strong total.

Hard 11 against a dealer 6 is a textbook double under basic strategy. The dealer's bust card makes doubling clearly positive EV.

Basic strategy is to always split 8s. Against a dealer 10 with no surrender, splitting loses less than playing a hard 16.

A hard 18 against a dealer 10 is a standard stand; hitting or doubling risks busting for little gain.

Soft 19 against a dealer 10 is a stand in basic strategy. Doubling or hitting only lowers expected value.

With a hard 15 against a dealer Ace (S17, peek, no surrender), basic strategy is to hit. The dealer ace is strong, so standing on 15 loses more often.

Basic strategy with no surrender available is to hit hard 16 against a dealer Ace. Standing on 16 loses too often against the dealer's strong upcard.

A hard 18 against a dealer Ace is a stand in basic strategy. Hitting risks busting on any card from 4 upward, which costs more than it could gain.

Under 6-deck S17 basic strategy with the dealer peeking, hard 10 against an Ace is a hit rather than a double. Doubling here is only correct when the dealer hits soft 17.

Hard 12 against a dealer Ace is a clear hit in basic strategy. The dealer rarely busts from an Ace, so standing on 12 loses more often than drawing.

With a hard 15 against a dealer 9, basic strategy says to hit. Surrender isn't available, and standing loses more often than hitting.

Basic strategy says to hit a hard 9 against a dealer 10, not double. Doubling 9 only pays off against a dealer 3 through 6.

Hard 19 against a dealer 10 is a clear stand under basic strategy. Hitting risks busting for little gain.

Hard 11 against a dealer 2 is a standard double under basic strategy for 6 decks with the dealer standing on soft 17.