The goal is not to impose a ball, but all. Similarly in French billiards, the goal is not to make a point, but a number of points Mastery of movement of any ball movement is key. Whatever game mode, the address is not the word. Of course, there must be “clever” to pocket a ball or perform a particular shot, but if we do not think as a result, it leads to nothing. The preliminary reflection is essential, the “mechanics” of the gesture is only the extension.
This mechanism depends on several things, including among others the position of the body relative to the billiard ball and attack. Everything must be done so that the director eye is in the line of sight, into the forearms the barrel can have a pendulum motion on the same axis without constraint. There is no real position “academic”, the main thing being that it is stable and pleasant. The same applies to the bridge, that is to say the position of the hand placed on the pool that must be stable and the guide arrow.
The pool is based on very simple physical laws, the beads are perfectly spherical, straight and perpendicular bands, mats and sensible to oppose a constant resistance to movement.
Knowing these principles can predict the direction in which the ball after a shock attack. By adjusting various parameters, you can change this direction and make it more conducive to the pursuit of the goal.

The amount of ball is the term used to quantify the target. The goal here is to have reference points, that is to say, to know the behavior in specific cases, to extrapolate the behavior in practice.


Consider the cue ball as a cue ball. The diagram shows what can be seen by placing the eye (director) on the line of sight which passes through the white center of gravity according to a vector parallel to the table. The amount of ball intrinsically expresses the ratio of energy transfer during impact between the two balls.

Aim “full ball” is to align the axis of the 2 centers of gravity. Mass transfer during the shock is over, the ball sighting inheriting all the strength.

Aim “3/4 ball” is to align the center of the cue ball with a point at half the radius of the target ball. She inherits 3/4 of force, 1/4 remaining white.

Aim “half ball” aligns the line of sight on the tangent of the target ball. The transfer is equivalent. Aim “1/4 ball” is to align the center of the cue ball with a point outside the ball of sight at a distance of half a radius. The report is the fourth time for targeting, 3/4 to the cue ball.

Aim “Fine” aligns the center of the cue ball with a point outside of the ball sighting distance of a radius (in practice slightly less to ensure contact). Only a small amount of force is transmitted to the target ball.

Obvious consequence:

Apply a force to the cue ball, theoretically permetant him to go to a full mètre.En ball, the cue ball stops and the ball travels under one meter. Aiming half ball, the two balls should go each 50 centimeters, etc.

The effects:

The ball is moved by contact with the process. Change the contact point induces a rotation of the ball.

Hitting the ball outside the yellow area is risky and unnecessary. The process may drag on the ball, completely changing the trajectory, and generally causing a fault of the game. To prevent this, the player applies on the process of chalk, more commonly called the “Blue”. It is a cube packaged powder increases the adhesion of the method when it comes into contact with the cue ball. Without the use of the chalk, handling effects would be impossible.

Hitting the center is said to have no effect; Hit in the line L2 provides a retro, contrary to the movement of the ball; Hitting over the line L2 gives a cast, favorable effect to the movement; Hitting the left or right of the line L1 induces a side effect.

It is important to note that the strength of the shot comes in. The effect is opposed to the resistance of the carpet, and thus gradually loses power. We can also consider a shot at low power center as a lightweight cast, the ball taking a natural effect due to its motion. However if the blow is strong, the shot is actually no effect because the ball does not turn on itself but slips on the carpet.

The tail-flick is critical, and must be adapted. This term includes the power of the shot, the horizontal tail, coaching or not the movement, fluidity of movement, etc. A blow “penetrating” is generally preferable to a rap, it makes it possible to obtain a better yield between print effect and the speed of the ball.

In general, the effect of use complicates matters, because adding a factor to the equation. When this is not necessary, it is best to avoid it based on the following principles.

Natural Burst is called “bursting” of the resulting clash between two balls. Theoretically a natural shock (no effect) changes the trajectory of the ball and attack induces a trajectory to the target ball as their directions form an angle of 90 °.


This 90 ° angle can be changed by effects. Backspin gives a reverse rotation to the direction of travel. So the ball tends to reverse itself. This effect increases the angle of bursting. The cast gives a rotation in the direction of travel, the ball has a tendency to continue on its initial trajectory after impact. This effect decreases the burst angle. The side effects do not affect the break, except in extreme cases.

Note that it is always the path of the attacking ball which is modified by these effects, the sighting of the ball is defined only by the point of impact.

Reaction bands

Playing without side effect, the angle of reflection equals the angle of incidence. The side effects change the angle of reflection. Retro and cast have no direct influence.

Correlated principles

Consider a simple shock: if we apply a retro or cast effect (see previous chapters), which adjusts the distance the white after impact and direction, but not the distance traveled by the target ball, or its management ;

plus the amount of ball, the less retro and cast have influence on the direction of the cue ball. We need to “support” for these effects to be effective. If we consider the mass transfer, it makes perfect sense. The effect goes against the movement of the ball, so more the original motion, the smaller the change is significant. Excluding a number of small ball leaves a lot of strength to the cue ball.

Quantity band

The previous remark can be transposed to the side effect after a shock to the band. Over the incidence angle, the less support on the tape is frank, and therefore the effective effect.

Successive shocks

When any change of trajectory, a ball tends to take a natural effect largely due to the resistance to movement of the sheet. It’s pretty trivial, the ball being spherical. One can easily see this behavior over several successive bands.

Any effect of the cue ball induces a reverse effect on the ball of sight, following the principle of the gear. If the target ball touches a band after the initial burst, its natural trajectory can be changed. Of course, the “losses” due to the different shocks and sheet resistance are important.


It is noted that if the basic principles are very simple, the practice can become very complex as parameters are numerous. Add to that the material factors, such as differences linens resistance, elasticity tapes, potential impurities that can deflect a trajectory etc. It quickly imagine the necessary control for advanced players, and includes the hardware requirements of the champions, as in any sport.

These principles are independent of the mode of play, their knowledge is useful to all.

However their application may vary from one pool to another, mainly because of the material. The sheet of a snooker is not the same type as that of a French billiards, heating a pool affects the working and decision-effects, as the quality of the bands or balls.

The reference points as to the strength and effects therefore vary from one table to another, even for size billiards, same brand and model. It is necessary to adjust his game accordingly.

Thank you to Wikipedia.