Learn three-cushion · Short-angle (natural) · Mirror (pure reflection)
Natural three-rail: from diamond 1 to 2.5
Difficulty ●○○○○ · Free · 01/10/2026
How to play it
Path. top long rail → right short rail → bottom long rail. Rail contact points are built by the mirror rule (angle in = angle out).
Execution. No english or very little, so the path stays closest to the mirror; medium speed.
Adjust. Running english makes the ball go longer than drawn; reverse english shorter. Humid room or old rails: shorter.
Drill. Place the balls on the diamonds, shoot ten times, record how many land within half a diamond.
System formula
Điểm băng = giao của đường từ bi tới ảnh gương của đích qua băng đó.
Angle in = angle out, no english. Used to understand basic geometry and as the baseline for corrected systems.