The 'logic' of d'Alembert system is that you will make up more than you lost if you bet more after a loss.
Applying this system to even chance bets, you increase your bet unit on a loss and decrease it on a win. So if we bet on red and the spins are as shown on the table below, after 11 bets you will have profit of $6.
Spin # | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
Your bet | $1 | $2 | $3 | $2 | $3 | $2 | $1 | $2 | $1 | $2 | $1 |
Previous bet +/-one unit | -- | $1+$1 | $2+$1 | $3-$1 | $2+$1 | $3-$1 | $2-$1 | $1+$1 | $2-$1 | $1+$1 | $2-$1 |
Red or black (outcome) | Black | Black | Red | Black | Red | Red | Black | Red | Black | Red | Red |
Result (you win) | -$1 | -$2 | +$3 | -$2 | +$3 | +$2 | -$1 | +$2 | -$1 | +$2 | +$1 |
Accumulated result (profit) | -$1 | -$3 | +$0 | -$2 | +$1 | +$3 | +$2 | +$4 | +$3 | +$5 | +$6 |
The Catch of d'Alembert system is the same as for Martingale. There is still the possibility to wipeout of your bankroll or reach the table limit if you have a long sequence of consecutive losses or a period of time where 'black' occurs more often than 'red'.
A to Z Lists
Gaming Directory