Yes, you will see it work say, 9 times out of 10, but the winnings from your 9 successful session will not cover your losings from the 1 losing session you are bound to come across sooner or later. Forthe sake of example, we'll assume that your bet is going to be red or black, even though you could easily bet even or odd, 1-18 or 19-36. When you've hit your color and won a bet, double the bet on the same color for the next spin. In a classic martingale betting style, gamblers increase bets after each loss in hopes that an eventual win will recover all previous losses. Learn More, how to Load and Play William Hill Casino Club. Dubins ; Leonard. Actually, it is slightly less than 50/50 with the 0 and. Mathematical analysis edit, the impossibility of winning over the long run, given a limit of the size of bets or a limit in the size of one's bankroll or line of credit, is proven by the optional stopping theorem. You win, so you decrease your bet. The are a couple disadvantages to this strategy. Just because black has won 10, or even 100, times in a row does not mean that red is any more likely the next time around.