Blackjack table

Hard 17 against a dealer 7 is a standing hand in basic strategy; hitting risks busting a made hand, and doubling with 17 is far too risky.

Hard 17 is a standing hand against any dealer upcard; with a 5 showing, the dealer's bust probability is high and hitting risks busting a made hand.

Hard 20 against a dealer 10 is a near-maximum standing hand; doubling or splitting only sacrifices expected value.

Hard 16 vs dealer 6 is a standard stand: the dealer's 6 is a bust card and hitting risks busting. Doubling a 16 is not profitable.

Hard 12 against a dealer 9 is a clear basic-strategy hit; standing only wins on a dealer bust, which is unlikely with a 9 upcard.

Hard 11 against a dealer 4 is a strong double-down spot under S17 basic strategy; doubling maximizes expected value versus hitting.

Hard 15 against a dealer 4 is a basic-strategy stand; the dealer's high bust probability with a 4 upcard makes hitting the riskier play.

Hard 15 against a dealer 3 is a standing hand in basic strategy; the dealer is likely to bust from a weak upcard, and hitting risks busting with 12s through 9s in the shoe.

Hard 13 against a dealer 5 is a standard stand: the dealer is likely to bust from a stiff upcard, and hitting risks busting a made hand.

Hard 12 against a dealer King is a clear basic-strategy hit; standing loses far more often since the dealer likely makes 17-20.

Hard 14 vs dealer 10 is a basic-strategy hit; standing loses more often than drawing.

Hard 9 vs dealer 5 is a strong double spot: dealer's 5 upcard is likely to bust, and doubling extracts maximum value from a favorable situation.

Hard 19 vs dealer 10 is a clear stand in basic strategy; hitting risks busting a near-winning hand.

Soft 19 vs dealer 9 — basic strategy says stand; doubling is too risky.

Basic strategy: a pair of 4s (hard 8) is hit against a dealer 9; splitting 4s is only correct against dealer 5 or 6.

Hard 12 against a dealer 9 is a clear hit per basic strategy; standing leaves almost no chance to win since the dealer likely makes 17+. Doubling and splitting are not legal here anyway.

Hard 12 vs dealer ace is a losing hand either way, but hitting is less bad than standing under basic strategy.

Hard 17 vs dealer ace is a losing standing position; basic strategy says hit (dealer doesn't have BJ since peeks done).

Hard 5 against a dealer King is far too weak to stand or double; basic strategy says hit until reaching a safer total.

Hard 10 vs dealer 10 is a clear hit; doubling is unavailable, so I draw one card.

Hard 12 vs dealer 10 is a clear hit per basic strategy; only 4+5+2+3 composition slightly favors hitting since no 10 was drawn.

Hard 8 against a dealer 10 is a clear basic-strategy hit; doubling is only correct for 9-11 totals, and standing on 8 has virtually no chance to win.

Hard 15 vs dealer 10 is a losing hand that improves by hitting; basic strategy calls for a hit here.

Hard 8 vs dealer 3 is a clear hit per basic strategy; doubling is only correct against 5-6, and standing on 8 has no chance to win.

Basic strategy: stand on multi-card 16 versus a dealer 3 upcard; hitting risks busting with only marginal EV gain.