Since there are players at various levels, I tried to prepare the levels at certain levels. If you have not used any system before and you are just starting to start systems, I recommend you to start here. Because in this book, there are basic systems that should be known first, how to make calculations, application methods, stroke techniques and more. I have also included various tips that I think will be useful for you in the game.
It is for players who know the system calculations in later levels (Level 2 and Level 3) and want to advance them. You can find all the levels of the series in a single book “Level 1-2-3".