Blackjack table

Hard 12 versus a dealer 10 is a clear hit under basic strategy; standing or doubling would be worse EV.

Hard 18 versus a dealer 10 is a stand per basic strategy; hitting busts far too often.

Hard 13 against a dealer 10 is a basic-strategy hit; standing loses far more often since the dealer makes a strong hand frequently.

Hard 20 against a dealer ten; standing is the only sensible play since hitting busts almost always.

Hard 12 against a dealer 7 is a basic strategy hit; standing on 12 vs 7 loses more often since the dealer busts only about 26% of the time.

Hard 17 versus a dealer 5 is a clear stand under basic strategy; the dealer is likely to bust and hitting risks busting our own hand.

Hard 13 versus a dealer 10 is a hit under basic strategy since standing loses far more often; doubling is wrong with such a weak total.

Hard 20 against a dealer 9 is a clear stand per basic strategy; splitting tens or hitting would sacrifice a very strong hand.

Hard 15 against a dealer 8 is a hit per basic strategy; standing leaves us losing too often to the dealer's likely 18.

Hard 17 against a dealer 8: basic strategy says stand, since hitting a hard 17 busts far too often.

Hard 18 versus a dealer 8 is a clear stand per basic strategy; hitting or doubling would be far worse in expectation.

Hard 15 versus a dealer 9 is a hit per basic strategy since surrender is unavailable; standing loses far more often than hitting.

Hard 13 against a dealer 8 is a basic strategy hit; standing loses too often since the dealer makes a hand most of the time.

Basic strategy: always split aces, especially against a dealer 4.

Hard 20 versus a dealer ten is a strong stand; splitting tens or hitting would be a clear EV loss under basic strategy.

Basic strategy always splits a pair of aces, especially against a dealer 6; each ace receives one card and both hands start strong.

Hard 13 against a dealer 10 is a hit per basic strategy; standing loses far more often since the dealer makes a hand most of the time.

Hard 14 against a dealer 10 is a hit by basic strategy, since standing loses far more often than the bust risk costs.

Hard 17 against a dealer King; basic strategy says stand on hard 17 regardless of upcard since hitting busts too often.

Hard 5 against a dealer 6: basic strategy says hit; doubling a hard 5 is never correct.

Hard 8 vs dealer 6: basic strategy says hit since we cannot bust and doubling is not allowed on three cards.

Hard 17 against a dealer 6 is a clear stand per basic strategy; hitting risks busting while the dealer is likely to bust.

Hard 20 against a dealer 6 is a strong hand; basic strategy says never split tens, so standing maximizes expected value.