there are tree sections divided into the 1st 12 and 2nd 12 and 3rd 12. PLace and equal amount on 2 of the 3 sections ( say 5) so i place 5 on 1st 12 and 5 on the 2nd 12. The pay out on these is 2:1 so technically you have about a 64% chance of winning (taking into account the 0 and 00). Then if you lose you have to multiply your previous bet by 3 then 9 then 27 then 81. The best cover your loss of previous bets and your loss on that bet.