Blackjack Strategy When Playing a Hard 12
Stand: When the dealer upcard is 4, 5 or 6.
Hit: When the dealer has anything else showing.
Why to stand on hard 12
The strategy gets a little tricky when you have a total hard hand of 12. The hope here is that the dealer holding a 4 through 6 will draw a ten card and then have to take another hit and bust. It's a long shot but basic blackjack strategy says this is the best move in the long run. Another reason you want to stand is if you decide to take a hit, you may end up getting a ten as well and busting with a 22, which is very likely because of this same strategy of the tens.
Why to hit on hard 12
When the dealer has anything else, the odds of a bust will decrease to the point where it makes sense to hit on a hard twelve. It's certainly not the best hand you could be dealt. I myself dread getting a hard 12 and then having to make a tough choice. Just follow these tips because they are mathematically the "correct" blackjack move over the long term.