The aim point(red) is calculated from the cue ball position number(blue), the target position number(yellow), and adjustment value based on the english(green).
The system is only a guideline and is not universal. There is no way that such a simple formula can cover all the laws of physics, and it varies depending on factors such as the friction of the cloth, the speed of the cushion, temperature, humidity, and the individual's stroke style.
Therefore, we have made it possible to reduce errors by customizing the areas where the numbers are likely to change due to environmental factors (points surrounded by squares).
Even if you work hard to memorize the system, it's meaningless if you can't use it in real table. In the fact, not all layouts are simple, that you need to have some tips and practice to use it in real table.
And therefore, KSSM provides a "Practice" mode.
For those who don't use a system and just hit the cushion by feel, this can also be a form of image training.