How it works
From the System Library: the source's numbers, checked in this game's physics but not reviewed by a coach.
Two cushions before the red: the cue ball goes across to the short rail, comes back along the long rail and meets the red there, then takes a third cushion to the yellow. Aim = Start × Arrival — a multiplication, not a difference.
The source's formula picture swaps the two cushions; all ten of its diagrams, and this drill, follow First cushion = Start × Second cushion. A pool kick system of the same name multiplies the same way.
Reading the numbers
Start On the short rail behind the cue ball, along its own line to the aim: 0 at the long rail the shot comes back along, 1 a diamond to 4 at the far corner.
Aim On the first cushion, the short rail across the table: 0 in the corner on the second cushion's rail, 10 a diamond up to 20 at the middle.
Arrival On the second cushion, the long rail: 0 in the corner by the first cushion, 1 a diamond to 2, then 1 every two diamonds to 5 in the far corner.
Step by step
- Choose the arrival: where on the second cushion the cue ball must come to meet the red.
- Read the start: the cue ball's own line, traced back to the short rail behind it.
- Aim = Start × Arrival. Start 3 to arrive at 4: aim at 12, 1.2 diamonds from the corner.
- Re-read the start along the new line, work it once more, then add the table correction.
The stroke
No side, three tips of follow (12 o'clock), speed for two and a half to three rails.