Can You Match This Curve?

Can you match a curve from memory after it disappears? A Bézier curve is displayed for 2 seconds, then vanishes. You redraw it freehand, and the game measures your average deviation from the original path. It's a pure test of visual-motor memory. You're encoding the curve's inflection points, peak height, and overall sweep, then reconstructing them with your hand.

How to Play

1. Study the curve carefully for 2 seconds while it's displayed.
2. When it disappears, redraw it as accurately as possible.
3. The original curve reappears as an overlay to show your accuracy.
4. Your score is the average pixel deviation along the path.

Why It's Hard

Curve memory is surprisingly fragile. Your working memory stores rough shape categories ("S-curve," "gentle arc") rather than precise amplitude values. When you go to reproduce it, you recall the category but reconstruct the magnitude from a noisy estimate, typically flattening peaks by 20–30% and misremembering inflection positions by significant margins.

Tips

• Silently name the curve as you study it: "shallow S-curve peaking near the top-left."
• Pay extra attention to where the curve crosses the horizontal midline. That's where most errors happen.
• Draw at moderate speed. Too fast loses fine control, too slow lets your memory decay mid-stroke.

FAQ

How many seconds do I have to study the curve?

Two seconds on easy, which can feel very short. Harder modes may reduce display time or add distractors.

What is considered a good deviation score?

Under 15 px average deviation is excellent. The curve canvas is typically 400 px wide, so 15 px represents about 4% error.

Are curves always the same style?

No, the game generates random Bézier curves with varying numbers of control points, so no two rounds are alike.