Massé Shot in Pool — Curving Around a Blocker
The "magic" shot where physics gets weird
How a ball "turns the corner"
You've seen it in highlight reels: cue ball goes one direction, then suddenly curves around a blocker and contacts the OB. That's massé.
Massé is the highest-difficulty technique in cue sports. Understanding the principle ≠ executing it — but understanding why it works reveals what's happening on every other shot too (massé is just an exaggerated version of the spin physics from Lesson 4.2).
Why massé curves
Normal cue ball: spin axis is roughly horizontal (forward roll, side spin, draw — all in the horizontal plane).
Massé: cue is held nearly vertical when struck. This gives the cue ball a tilted spin axis — partly vertical, partly horizontal.
What happens as the ball travels:
- Initial velocity is in one direction
- The bottom of the ball is in contact with the cloth
- Because the spin axis is tilted, the contact point's velocity differs from the ball's overall velocity
- Cloth friction acts in this differential direction — it pushes the ball sideways
- Result: the ball's path curves into an arc
- Cue is held near-vertical (60°+ elevation)
- CB receives a tilted spin axis (vertical component is key)
- Cloth friction "twists" the path into an arc
Controlling curve direction and radius
Two inputs decide the curve:
- Initial velocity direction (where you aim)
- Side-spin direction (left or right English combined with elevation)
Combinations:
- Aim left + right English → path curves to the right
- Aim right + left English → path curves to the left
- More English magnitude → tighter curve radius
- More power → longer arc length
Caveat: due to squirt from the steep elevation, the cue ball initially deflects opposite the spin direction before the curve takes over. Beginners aiming a massé often see the ball "go the wrong way first" — that's the squirt phase before the curve engages.
- Aim direction + English direction = curve direction
- More English = tighter curve; more power = longer arc
- Initial squirt opposite the spin before the curve engages
When to attempt massé · almost never
Honest framing: amateur players should not consider massé except as a last resort. Reasons:
- Very high failure rate even for skilled players
- Can damage the cloth (steep cue strike)
- Most situations have a more reliable alternative (bank, kiss, safety)
- House rules and tournaments may forbid it
BUT understanding massé physics has value for all players: tiny massé effects exist on every shot with side spin. On a long-distance soft shot with English, you'll see a slight curve toward the spin — that's mini-massé. Knowing this lets you predict more accurate cue ball positions.
This lesson is concept-only. Full massé physics (3D rotation, cloth-air interaction) will come in a future engine update.