3C

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

Natural three-rail: from diamond 1.5 to 3.5

Difficulty ●○○○○ · Free · 01/10/2026

Cúp băng: từ nút 1.5 về nút 3.512345671.53.5
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

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.