Blackjack table

Hard 13 against a dealer Ace: basic strategy says hit, since standing loses too often against a strong upcard and surrender is unavailable.

Hard 14 against a dealer Ace is a hit per basic strategy since standing loses far more often; dealer has already been checked for blackjack.

Hard 9 against a dealer 10: basic strategy says hit, not double, since the dealer's strong upcard makes doubling negative EV.

Hard 16 vs dealer 10 with no surrender: basic strategy says hit (multi-card 16 is marginally better to stand in some composition-dependent cases, but with 4-5-7 the difference is negligible and hitting is standard).

Hard 17 against a dealer 10: basic strategy says stand, as hitting busts far too often to improve expectation.

Hard 16 versus dealer 7: basic strategy says hit, since standing loses more often against a dealer who will make 17+ frequently.

Hard 20 against a dealer 10 is a clear stand under basic strategy; splitting tens or hitting would be a significant EV mistake.

Hard 19 against a dealer King: basic strategy is to stand, as hitting risks busting and doubling is far worse than standing.

Hard 20 against a dealer ten is a strong stand per basic strategy; never split tens.

Soft 15 (A,4) vs dealer 3: basic strategy says hit (double only against 4-6). Hitting is correct here.

Soft 17 (A-4-2) vs dealer 3: basic strategy says hit since doubling is unavailable; soft 17 cannot bust and standing on 17 is weak.

Hard 13 against a dealer 3 is a basic-strategy stand; the dealer has a high bust probability and hitting risks busting our own hand.

Hard 15 against a dealer 9 is a hit per basic strategy; no surrender is available so hitting minimizes expected loss.

Hard 16 vs dealer 10 with no surrender: basic strategy says hit, since standing loses more often against a strong upcard.

Hard 20 vs dealer 7 is a strong standing hand; basic strategy never splits tens here.

Hard 19 against a dealer 5 is a clear stand per basic strategy; hitting or doubling risks busting a strong hand.

Hard 19 versus a dealer ten is a clear stand per basic strategy; hitting or doubling would risk busting a strong hand.

Hard 11 against a dealer 7 is a standard double in basic strategy for multi-deck S17 games.

Hard 15 against a dealer 5 upcard: basic strategy says stand, since the dealer is likely to bust and hitting risks busting our own hand.

Hard 12 versus a dealer ten is a basic strategy hit; standing loses far more often since the dealer busts only about 23% of the time.

Hard 19 against a dealer ten is a clear stand; hitting risks busting with little upside.

Hard 17 versus a dealer 8 is a stand per basic strategy; hitting risks busting far more than it gains.

Hard 20 against a dealer 5 is a strong hand; basic strategy says never split tens, so standing maximizes expected value.