Blackjack table

Hard 14 against a dealer 9 is a clear basic-strategy hit; standing loses far more often than hitting, and doubling is too risky against a strong upcard.

Hard 16 against a dealer 9 is a basic-strategy hit; standing only wins if the dealer busts, while drawing can reach 17-21 against a likely strong dealer hand.

Hard 11 vs dealer ace: dealer peeks so no blackjack, and standing on 11 gives terrible EV; hitting is the standard play.

Hard 13 against a dealer Ace is a clear hit under basic strategy; standing loses far more often than drawing one card.

Hard 14 against an ace is a losing hand; standing wins only if the dealer busts, while hitting gives a chance to improve. Basic strategy stands here, but with only 10 chips at stake the marginal difference is small and hitting maximizes upside.

Hard 15 against a dealer 10 is a losing spot, but hitting risks busting on any 7-K (8 of 13 ranks). Standing keeps the dealer's ~23% bust chance working for me.

Hard 9 against a dealer 5 is a textbook double: the dealer's bust card maximizes expected value compared to merely hitting.

Hard 20 is a made hand; splitting or doubling tens against an Ace (which cannot be blackjack since the dealer peeked and play continues) only risks a strong winner. Standing maximizes expected value.

Hard 15 vs dealer 10 is a standard hit in basic strategy (surrender unavailable), since standing loses to most dealer draws and busting risk is acceptable.

Hard 20 against a dealer 5 is a near-certain winner; standing maximizes expected value versus doubling or splitting tens.

Hard 20 against a dealer 8 is a near-certain winner; standing maximizes expected value, while doubling or hitting would only risk a strong hand.

Hard 20 vs dealer 6 is a near-certain winner; standing maximizes EV, while doubling or splitting tens would destroy a made hand.

Hard 16 vs dealer Ace is a basic-strategy hit; with peek already done, dealer lacks blackjack, and standing on 16 loses to any dealer draw to 17+. Hitting maximizes EV despite bust risk.

Hard 20 vs dealer 5 is a clear stand; doubling or hitting risks a strong winning hand.

Hard 12 against a dealer 9 is a clear basic-strategy hit; standing only wins if the dealer busts, while drawing can improve to 17-21 without high bust risk.

Hard 20 is a near-winning hand; standing is clearly optimal against a dealer King. Doubling or splitting tens would sacrifice a strong position.

Hard 19 against a dealer ten is a clear standing position; hitting risks near-certain bust with minimal gain.

Soft 18 vs dealer 7 is a stand per basic strategy; hitting or doubling has negative expected value here.

Hard 6 against a dealer King is one of the worst starting totals; basic strategy says hit (doubling is far too weak here).

Hard 9 against a dealer 10 is a clear hitting situation; standing at 9 has almost no chance of winning.

Hard 18 is a made hand; standing is correct against a dealer 10 under basic strategy, and hitting risks busting a likely-winning total.

Hard 18 vs dealer ten is a clear stand; hitting risks busting for minimal gain.

Soft 20 (A,9) is a made hand; standing is clearly optimal against a dealer 9.