At loss of the bet, the following bet on unit is more, than previous. At a win of the bet, the following bet decreases for unit. Bets on the given progression are made before reception of positive balance.
d'Alembert roulette strategy example:
| Your bet: | Roulette color: | Result: | Balance |
| 1 on black | Red | -1 | 99 |
| 2 on black | Red | -2 | 97 |
| 3 on black | Black | +3 | 100 |
| 2 on black | Black | +2 | 102 |
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