Blackjack table

Hard 20 against a dealer ten is a strong hand, and splitting tens or doubling is worse in expectation than standing.

Hard 12 against a dealer 2 is a basic strategy hit in a multi-deck game with the dealer standing on soft 17. Doubling is not recommended here.

Soft 20 against a dealer 6 is a strong hand, so standing is the standard basic-strategy play. Doubling adds too little expected value to justify the extra risk.

Hard 15 against a dealer 7 is a basic-strategy hit, since the dealer's likely total of 17 beats standing on 15. Doubling isn't advised on 15.

Soft 17 against a dealer 9 is best played by hitting under basic strategy for 6 decks with S17 (doubling is only correct against 3-6), so I hit rather than double or stand.

Hard 13 (Ace counted as 1 since 11 would make 24) against a dealer 9 is a hit under basic strategy, since standing on 13 loses too often against a strong upcard.

Hard 17 against a dealer 2 is a standard stand, since hitting risks busting with a high chance and doubling is only worthwhile on much weaker totals.

Hard 10 against a dealer ten is a hit in basic strategy, since doubling is only correct against dealer 2 through 9. The dealer has already peeked for blackjack, so a hit is safe.

Hard 20 against a dealer Kd is a strong hand, and hitting would almost certainly bust, so standing is correct.

Hard 5 against a dealer ten is a clear hit under basic strategy; doubling is not favorable here.

Hard 15 against a dealer ten is a losing hand either way, but basic strategy says hit because standing loses more often than hitting; no surrender is available.

Hard 20 against a dealer Queen is a very strong hand, and hitting would almost certainly bust, so standing is correct.

Hard 14 against a dealer 8 is a basic strategy hit, since standing is only correct against 2 through 6 and doubling is not advised here.

Hard 15 against a dealer 6 is a standard stand, since the dealer is most likely to bust; doubling on hard 15 is not favorable.

Hard 12 against a dealer 6 is a stand in basic strategy, since the dealer is most likely to bust and hitting risks busting first.

Hard 13 against a dealer 6 is a standard stand, since the dealer busts often and hitting risks busting the player's own hand. Doubling is not favorable with a hard 13.

Basic strategy for 6-6 against a dealer 10 is to hit rather than split, since splitting into two weak hands against a ten loses more in expectation. Hard 12 vs 10 is a hit, and doubling is clearly worse.

Hard 14 against a dealer 10-value upcard is a losing hand either way, but basic strategy says hit because standing loses more often than hitting does.

Hard 19 against a dealer Queen is a clear stand; hitting or doubling would have lower expected value.

Hard 16 against a dealer 10 is best played by hitting under basic strategy, since no surrender is available and the dealer peeked with no blackjack. Chat is off, so the message is empty.

Hard 19 against a dealer ten is a clear stand; hitting risks busting with almost any card beyond an ace or two.

Hard 17 against a dealer 3 is a standard stand; hitting risks busting and doubling has negative expected value.

Hard 6 against a dealer King is a clear hit by basic strategy; doubling is only correct against weaker upcards, and standing on 6 would lose too often.

Hard 16 against a dealer King is a basic strategy hit, since standing loses more often than hitting even with the bust risk. With three cards in hand, the composition adjustment does not change this.

Hard 19 against a dealer King is a clear stand, since hitting risks busting with a strong hand and the dealer must reach 17 or higher anyway.