The Parlay 31 Roulette system takes its unusual name from a simple rule - to finish a game session, you should lose the total of 31 chips. The progression of the system has the following row of numbers:
The principle of Parlay 31 Roulette system is that in case your bet wins, you should double your following bet. That is, if you place the bet of 4 chips and win, the following bet you place will be 8 chips.
In case of losing, the size of your following bet should be calculated according to the progression of Parlay 31 Roulette system. Thus, the game continues till you reach the positive balance.
At a quick glance at the table and minimum analysis performance it becomes clear that the positive balance occurs already after two winning bets in a row out of ten possible. Taking that into consideration, the chance is not that little.