Learn three-cushion · Long bank (five-and-a-half) · Corner-five (diamond) system
Corner-five: cue 50, aim 20, arrive 30
Difficulty ●●○○○ · Free · 01/10/2026
How to play it
Situation. Cue ball at 50 (the corner); the two object balls sit near the opposite long rail around 30.
Formula. third rail = cue − first → 50 − 20 = 30. Aim at diamond 20 on the top long rail.
Execution. Running english (same side as the path), one tip above center, medium speed for three rails. Level cue, stroke through the ball.
Check. If the ball comes up short of 30, use less english or aim a smaller number; if long, add english or aim five units higher.
Remember. Every five units on the first rail shifts about half a diamond on the third. New or warm cloth runs longer than old cloth.
System formula
băng 3 = bi cái − băng 1. Ví dụ 50 − 30 = 20. Đánh với ép-phê thuận, lực vừa; bi cái ≈ cao 1 típ.
The classic diamond system for long–short–long rail paths. Cue ball numbers 50 at the corner, 60–90 up the short rail, 40→10 along the long rail; first rail numbered 10–70; third rail = cue − first.