You can learn and exercise the system of 3-Cushion billiards game.Target ball can be place anywhere you want like real game.How to…1. Place the three balls freely. (You can select the Radio buttons bottom of the screen to select what ball to place. White ball is Cue ball.)2. Decide first rail point for Cue ball. (Touch/Scroll right side of the screen.)3. Shot to see the whole route of the Cue ball whether it can hit the rest balls you placed.4. Use "Cancel" button to delete the lastest shot.This application support some options.1. Cue ball : If you choose the number of Cue ball, White ball will be placed at the specific point and all the routes will be shown.2. to Full/1st mode : In Full mode, if First cushion is decided, full route will be shown directly. You don’t have to use "Shot !!" button.3. Table Change(International/Small size) : You can choose table size between international size and small size table.4. Wide/Narrow line : In Wide line mode, the routes will be show with ball width thickness.5. Clear : Erase all shots.All the systems are same as it is not perfect to use it in real game.Need exercise make your shot/spin to fit.I hope you understand this F&H system easily. Especially, all the 4th cushion point is different even 3th cushion point is same if Cue ball number is different.Enjoy and make the system yours!