The reverse D’Alembert System is very similar to the D’Alembert System but just reversed. Sometimes called contra-Alembert, instead of adding one after every loss, the system adds one after every win. Lets take a look at an example.

Bet NumberUnits betResultRunning Total
15loss-5
24win-1
35loss-6
44win-2
55win+3
66lose-3
75win+2

The system builds on winning streaks rather than chasing losses. In this example, there are 3 wins and 3 losses. Whereas in the D’Alembert system this would have broken even, in the reverse system you are actually 3 down. As each loss subtracts from the next bet, the win doesn't quite cover the loss.

The Reverse D’Alembert system is more conservative than the D’Alembert. As chips are reduced on losses, the amount you can lose on bad streaks is reduced. Consequently, the amount you can win is reduced too. This leads to a slow steady decline but you can play for longer on average.


Reverse D’Alembert after 10000 spins


D’Alembert after 10000 spins

You can see after 10000 spins, the D’Alembert is much more down, due to losing streaks being able to impact the bankroll. With the reverse D'Alembert when you hit a losing streak, it resets so you don't lose as much.

 

 

Code for roulette Xtreme, it’s in the built-in system files too.

 

Copy Code 


system "Reversed_D'Alembert_System"

{Reversed D'Alembert System
is one of the oldest money management plans there are, for "even chances"
betting, all having in common that you add and subtract a fixed
amount to your bet, after a loss or win.

Same as D'Alembert except you Up as you Win and Subtract as you Loss.
}
method "main"
begin
    While Starting a New Session
    begin
        Clear All Records;
        Clear Record "Initial Bet" data;
        Clear Record "Current Layout to Bet" data;
        Put 5  on Record "Initial Bet" data;
        Call "Setup Layout";
        call "Make Bets";
        Exit;
    end


    While Record "Current Layout to Bet" layout has lost each time
    begin
        Subtract 1 on Record "Initial Bet" data;
    end
    
    While Record "Current Layout to Bet" layout has won each time
    begin
        Add 1 on Record "Initial Bet" data;
    end
    
    While Record "Initial Bet" data = 0
    begin
        Put 5 on Record "Initial Bet" data;
    end
    
    Call "Make Bets";
end

method "Make Bets"
begin
    Put 100 % of Record "Initial Bet" data on Record "Current Layout to Bet" layout;
end

method "Setup Layout"
begin
    Input Dropdown "Make a Layout Selection

              1:=Even
              2:=Odd
              3:=Red
              4:=Black
              5:=High (19-36)
              6:=Low (0-18)" to Record "Layout Selection" data;

    If Record "Layout Selection" data = 1
    begin
        Copy Even to the Record "Current Layout to Bet" layout;
    end
    Else
    begin
        If Record "Layout Selection" data = 2
        begin
            Copy Odd to the Record "Current Layout to Bet" layout;
        end
        Else
        begin
            If Record "Layout Selection" data = 3
            begin
                Copy Red to the Record "Current Layout to Bet" layout;
            end
            Else
            begin
                If Record "Layout Selection" data = 4
                begin
                    Copy Black to the Record "Current Layout to Bet" layout;
                end
                Else
                begin
                    If Record "Layout Selection" data = 5
                    begin
                        Copy High to the Record "Current Layout to Bet" layout;
                    end
                    Else
                    begin
                        If Record "Layout Selection" data = 6
                        begin
                            Copy Low to the Record "Current Layout to Bet" layout;
                        end
                    end
                end
            end
        end
    end
end