The D’Alembert is also known as the Pyramid, because of the shape of its fluctuating wagering structure. It’s pretty simple: increase your bet one unit after every loss, and decrease one unit after every win.
This is one of your pummel-your-way-to-victory deals, and it frequently does work. But there will be times when your bets have been pushed to the ionosphere, and there will be no one on hand to talk you down. Because by that time, a lot of money will be gone, so who would want to?
This is one of the chilling facts of gaming: in the same spirit that everyone loves a winner, nobody likes a loser.
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Martingale
Mini-Martingale
Contra D’Alembert
Oscar’s Grind