Let's assume that if we lose, we will double the bet if we win one of the Straight-Up, we return to the base bet, and if we win one of a Dozen, we keep the current bet. We also factored in the use of the Martingale system, which doubles the stake amounts after a losing round and goes back to the base stakes after a win. To do this, we used Google Sheets and incorporated the three possible outcomes along with the mathematical probabilities of each occurrence. We will now put the 24+8 system to the test. If you have read any of our other roulette strategy tutorials, then you know what’s coming next. If you wanted to continue, this loss would prompt you to double your bets for the next round in accordance with the Martingale system. None of our bets win: This goes for a $30 loss leaving us down a total of $18. We win with one of our straight-up bets for a $6 gain. We win another of our Dozens bets for no gain and no loss. One of our straight-up numbers comes in, giving us a $6 gain. Let’s take a quick look at how using the 24+8 system would look like over 5 fictitious rounds.

None of our numbers win: This will happen 8.11% of the time and result in a $30 loss.

One of the straight-up numbers hits: The probability of this is 27.03%, and it would result in a net gain of $6.

You’d win $30, but the lost bets also amount to $30, leaving you with a 0 gain/loss. One of the Dozens bets wins: This has a 64.86% chance of occurring, and it essentially results in a push.

So, after we have placed our $30 in bets, we can anticipate one of three different scenarios playing out. The zero, 22, and 25 remain open, and we pray to the gambling god that they don’t show up. You can see how the bets look using the illustration below.Īs you can see, we have wagered $10 on the first dozen (1 - 12) and $10 on the third dozen (25 - 36). We simply double the bet size after a loss and then go back to the original base stake after a win. What happens if we lose a round using the 24+8 system? Well, we follow the Martingale betting system. With 34 of 37 possible outcomes covered, we find ourselves with a 91.89% chance of winning. We are left with just two numbers plus the zero unaccounted for. This leaves a third Dozens section open in which we place $1 bets on 10 of those numbers. You need to stake $10 each on any two of the three Dozens.

The 24+8 system requires players to place multiple simultaneous wagers.

Roulette double zero strategy