3C

Diamond-system library · Short-angle (natural) · Mirror (pure reflection)

Natural three-rail: from diamond 1.5 to 5.5

Difficulty ●○○○○ · Member · 02/10/2026

Cúp băng: từ nút 1.5 về nút 5.512345671.55.5
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

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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.