An ace is traditionally a high card in blackjack and is said to be worth eleven points. In modern blackjack, an ace can also be counted as a ten or a point, depending on the rules of the particular game being played.
This means that an ace can be either a good or bad card, depending on the situation.
In general, an ace is considered to be a good card when it is played as part of a straight or near-straight. When an ace is combined with another low card (two through six), it increases the chances of achieving a higher hand value (for example, a five-card hand with an ace and two twos would be worth 16 points instead of 13).
Conversely, an ace can also be detrimental if it’s combined with other cards in a hand – for example, when it’s played with another high card (seven through ten) to form a hard 17. In this case, the Ace would represent four points instead of eleven – making the hand much less likely to win.
