Hello everyone!
I found some interesting strategy.
I tested around 2000 Hamburg spins.
Win around 45 units ...without lost
Rules:
Need wait 5 or more single dozens
after when appeared double dozen bet on that dozen if you lost bet against alone dozen still you win 1 unit.
F.e.
1 2 3
x
x
x
x
x
x
x
x
.... start bet
x we lost -1
x bet lost -1
x bet lost -1
x bet win +2
x bet win +2 and reach + 1 unit
wait another 5 or more single dozen (or column)
If some question please ...