The under/over 13 is a side bet in blackjack that a player can make on the first two cards dealt to him, and the bet turns on whether those two cards total under or over 13. Aces always count as one. The dealer automatically wins if the hand totals exactly 13.
The betting works like this: After you make your standard blackjack wager, a designated area on the layout is available for you to place chips on either under 13 or over 13. You must make a blackjack bet first in order to place this side wager, and your under/over 13 wager cannot be for more than your original blackjack bet, though it may be for less.
Immediately after you receive your first two cards, the dealer settles all under/over wagers.












