I took the idea by reversing completely the system (hexagon) of Thomas Leor, by the way, I've never understood what a hexagon has to do with betting a dozen and a column.

So here we go:

On the table I separate numbers in groups of 4, those groups are:

1 4 7 10

2 5 8 11

3 6 9 12

13 16 19 22

14 17 20 23

15 18 21 24

25 28 31 34

26 29 32 35

27 30 33 36

Every time there are 2 numbers of the same group, back to back, in a row, (that's the trigger) bet the other 2 dozens and the other 2 columns for a total bet of 4 units.

Example:

After number 1 comes number 7, in this case you should bet the 2nd, 3rd dozens plus the 2nd and 3rd columns with 1 unit each.

There are 5 numbers which make us lose 4 units, 16 numbers which make us lose 1 unit and 16 numbers which make us win 2 units net.

If you win that's good, wait for the next trigger opportunity, if you lost, no matter if it's 1 or 4 units, wait for the next trigger.

I'm going to explain a bit about the steps of the progression, since our expected payout is 2 units we should divide the running negative total by 2, for example we lose 4 units so the next bet must be 2 units on each of the dozens and columns and by winning it we are breaking even.

Initial bet 1 unit on each 2 dozens and 2 columns, win +2, lose -1 or -4

-1 } bet 1 unit on each 2 dozens and 2 columns, win +1, lose -2 or -5

-2 } bet 1 unit on each 2 dozens and 2 columns, win and break even, lose -3 or -6

-3 } bet 2 units on each 2 dozens and 2 columns, win +1, lose -5 or -11

-4 } bet 2 units on each 2 dozens and 2 columns, win and break even, lose -6 or -12

-5 } bet 3 units on each 2 dozens and 2 columns, win +1, lose -8 or -17

-6 } bet 3 units on each 2 dozens and 2 columns, win and break even, lose -9 or -18

-7 } bet 4 units on each 2 dozens and 2 columns, win +1, lose -11 or -23

-8 } bet 4 units on each 2 dozens and 2 columns, win and break even, lose -12 or -24

-9 } bet 5 units on each 2 dozens and 2 columns, win +1, lose -14 or -29

-10 } bet 5 units on each 2 dozens and 2 columns, win and break even, lose -15 or -30

-11 } bet 6 units on each 2 dozens and 2 columns, win +1, lose -17 or -35

-12 } bet 6 units on each 2 dozens and 2 columns, win and break even, lose -18 or -36

-13 } bet 7 units on each 2 dozens and 2 columns, win +1, lose -20 or -41

-14 } bet 7 units on each 2 dozens and 2 columns, win and break even, lose -21 or -42

-15 } bet 8 units on each 2 dozens and 2 columns, win +1, lose -23 or -47

-16 } bet 8 units on each 2 dozens and 2 columns, win and break even, lose -24 or -48

-17 } bet 9 units on each 2 dozens and 2 columns, win +1, lose -26 or -53

-18 } bet 9 units on each 2 dozens and 2 columns, win and break even, lose -27 or -54

-19 } bet 10 units on each 2 dozens and 2 columns, win +1, lose -29 or -59

-20 } bet 10 units on each 2 dozens and 2 columns, win and break even, lose -30 or -60