Gambling systems explained
d'Alembert system
The d'Alembert gambling system is a negative progression system. In other words, you raise the bet when you lose and lower it when you win.
Invented by French mathematician Jean le Rond d'Alembert, it is based on 'the equilibrium of nature' which means it works when you get an even number of wins and losses for the same bet.
A favourite of Roulette players, you can test it for yourself on a FREE roulette game. Just scroll to the bottom of this page.
Sequence of bets
The sequence of bets in a losing streak is:
1, 2, 3, 4, 5, etc
The sequence of bets for 3 losses and 3 wins would be:
1, 2, 3, 4, 3, 2
Cancel losses with wins
The advantage of the d'Alembert system is that it doesn't chase losses, it gets them back slowly, always certain that in the long run the results will be 50/50.
Test
1. Alternating win (W,W,L,W,L,L,W,L,W,W,L,W)
2. Alternating loss (L,L,W,L,W,W,L,W,L,L,W,L)
3. Consecutive win (W,W,W,L,L,W,W,L,W,W,W,L)
4. Consecutive loss (L,L,L,W,W,L,L,W,L,L,L,W)
5. Good win (W,W,W,W,L,L,W,W,W,W,W,W)
6. Bad loss (L,L,L,L,W,W,L,L,L,L,L,L)
Overall result for all 6 tests
Result
7 units profit
2 units profit
7 units profit
6 units loss
10 units profit
34 units loss
14 units loss
Stable and simple
The d'Alembert gambling system has similarities with the Fibonacci, in that it's reasonably stable for alternating results, but unlike the Fibonacci system, even a mild consecutive losing streak results in a loss.
It has the advantage of being simple. The bets can be tracked as you go - there's no need to write anything down.
The stretched d'Alembert
Many roulette strategists swear by the d'Alembert system or variations such as the "stretched d'Alembert" - where the bets only change after a number of winning or losing bets eg
1, 1, 1, 2, 2, 2, 3, 3, 3, 2, 2, 2 etc.
Small, consistent wins
Like all negative progression gambling systems, a long streak of losing bets can cause moderate losses.
Our gambling strategy tells you to limit losses by deciding in advance how much you're willing to lose. The last test suggests going for no more than 5 or 6 consecutive losses.
If you're a medium-risk gambler, the d'Alembert system will suit your style. It gives you the chance to make consistent wins without the threat of massive losses.
Test the d'Alembert system for FREE
Why not test the d'Alembert system out RISK FREE on roulette?
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You'll get 1000 play money credits and as long as you want to play the game. That should give you enough time to give the d'Alembert (or any other of our Roulette systems) a thorough test.
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