Placing ribonacci bets is either selecting the exact number of the pocket the ball will land in, or a small range of pockets based on their proximity on the layout.gambling free free craps US V FIVE GAMBLING DEVICES The Labouchère system, also called the cancellation system or split martingale, is a gambling strategy used in roulette. The user of such a strategy decides. The Labouchere System involves using a series of numbers in a line to determine the bet amount, following a win or a loss.History · Mathematical model · Called (or call) bets or · Betting strategies and. An explanation of the Fibonacci sequence and system, and how the system is applied to the game of roulette. Find out why the betting system is flawed and why.