A Double is the simplest type of Multiples, which includes two Single Bets. Multiples like Accumulators and Systems (Trixies, Yankees, etc.) have more than one bet included and are based on Doubles. The Trixie System, for example, is made up of three Doubles and a Treble.
Bettors can place Double Bets only on separate events, and that’s the structural difference between them and Bet Builders or Combos. Both these types refer to a multiple based on the same sporting event. However, Bet Builders and Combos could be a part of a Double Bet.
If your Double Bet is placed as an Each Way, it’s more complicated to calculate it than a Single. In both cases, you will need to know the place terms, if they are “1/2 first and second”, or “1/4 first and second,” for example, a parameter that makes a difference to your returns.
DSAB (Double Stake About Bet) is a betting type between a Single and a Double Bet. It consists of two Singles; if the first Single wins, then the double stake is wagered on the second selection, and if the second selection also wins, you double the starting stake back on the Single that was your first pick.