Learn three-cushion · Short-angle (natural) · Mirror (pure reflection)

Natural three-rail: from diamond 1 to 4

Difficulty ●○○○○ · Member · 01/10/2026

Cue ball hits the object ball then travels long rail – short rail – long rail at the natural angle. The most basic three-cushion pattern.Diagram: 3C engine, geometry verified

Member lesson

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.