Successful mental wheel clockers can obtain advantages of around 10% on turnover. Advantages rise to above 20% on turnover when a microcomputer is used to gather the timing information and perform the required calculations.

There are several ways to predict the outcome of a roulette spin using a microcomputer, ranging from simple timing devices through to devices employing the principles of quantum physics. Simple timing devices, whilst effective in skilled hands, do not provide a high degree of accuracy. There are too many variables in a real-world casino environment to make predictions based on quantum physics anything more than a great 'idea'. Some devices use a database of pre-recorded spin results as a look-up table to predict the outcome. These can be quite effective but are not usually adjustable on the fly. The device described in this report is the most sophisticated and flexible device currently available.

Optimum conditions required for wheel clocking

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The technique and methodology of calibrating a roulette clocking device

Before the final resting place of the ball can be predicted, the computer has to be calibrated. Once the ball has been released into the ball track it begins decelerating until it loses velocity to the point that it falls from the track. This is called the 'drop-point'. We need to pick a ball revolution several revolutions before the drop-point to allow us sufficient time to place our bets before “no more bets” is called. The ball revolution speed should not be less than 800 milliseconds per revolution because at higher speeds than this the ball is still skidding in the track rather than rolling. The computer is set to only log a ball revolution speed that falls between a narrow envelope of 150 milliseconds. Revolutions less than 800 milliseconds are ignored and a revolution greater than 950 milliseconds results in an “error” message causing the spin to be aborted. The revolution that falls within the 150 millisecond envelope is called the 'sweet-spot'. To calibrate the device the key is pressed every time the ball passes over the drop-point. Revolutions are ignored until the sweet-spot is hit. Once the sweet-spot is logged the key is not pressed again until the ball hits the drop-point. The device is now calibrated. The time from sweet-spot to drop-point is called the 'time-to-drop'.

A note on the ball revolution acceptance envelope

If the acceptance envelope is too large there is a possibility that if the revolution is captured at the extremes of the envelope, the captured revolution is one revolution before or after the revolution recorded at calibration. Given that the rotor is usually traveling at close to half the sweet-spot speed, this will result in a prediction that is almost opposite to the actual result. Tighter acceptance envelopes will result in more revolutions not falling within our envelope and being aborted (which result in an “error” message), but accuracy increases enormously.

The technique and methodology used to predict the final resting place of the ball

As zero passes under the drop-point the key is pressed; it is pressed again when zero next passes - this is the 'rotor-speed'. The main timing loop now starts and this is called the 'start-time'. The key is pressed every time the ball passes under the drop-point. As soon as the sweet-spot is hit and the ball revolution accepted, the computer performs the following calculation: -

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Explanation of formula

We take the time from when the second rotor press is logged to the time that the sweet-spot is accepted then add that to the time-to-drop. We then divide this by full revolutions; the remainder is the number of slots offset from zero.

The result of this calculation is the number that will be directly under the ball as it descends into the rotor at the drop-point. This number is passed to the player by use of a synthesized voice to a wireless earpiece concealed within the ear canal. The operator receives constant feedback in the form of a digitized voice and beeps throughout the calibration and predicting routines. Experience over thousands of spins has shown that the optimum number of slots to bet is five.

The device described above is capable an extremely high degree of accuracy under the required conditions and in the hands of a skilled operator. "In the hands of a skilled operator” is the key to obtaining an advantage at the game of roulette.

A mental wheel clocker can severely impact a casino’s bottom line with nothing more than dedication and skill whilst a less skilled person will lose considerably more than the house edge even with the most accurate computer in the world.

A person employing an electronic device to predict the outcome of a roulette spin does not necessarily have an advantage, in fact unless he is very skilled he could have a disadvantage up to 100%. This situation occurs because the player will only get his random distribution of one hit in 37 when the ball travels significantly within the rotor rather than dead-dropping.

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