Challenge packs
Five puzzles each, built around one geometry. Progress is stored locally; a pack keeps your best score per puzzle.
Pack 01
Straight talk
Five linear separations, from a wide clean gap to a nearly touching pair. Learn what margin buys you.
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Pack 02
Round numbers
Rings and shells. No line will do it — reach for x² + y² and start moving the centre.
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Pack 03
Bends
Parabolas, vees and waves. One coefficient at a time; the curve tells you which way to push.
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Pack 04
Honest noise
Outliers on purpose. Chasing them costs you margin — the reference optimum does not chase them either.
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Pack 05
Overfit traps
Interlocking moons and disconnected islands. Flexible functions are allowed, but wiggle is scored.
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Every dataset family
| Code | Family | Target concept | Difficulty | |
|---|---|---|---|---|
| A1 | Two clusters | Linear | Beginner | |
| A2 | Steep split | Linear | Beginner | |
| A3 | Offset ellipses | Linear / quadratic | Intermediate | |
| A4 | Inner vs outer ring | Implicit quadratic | Intermediate | |
| A5 | Parabolic split | Polynomial | Intermediate | |
| A6 | V-shape | Absolute value | Intermediate | |
| A7 | Sine boundary | Trigonometric | Advanced | |
| A8 | Noisy line | Linear + robustness | Intermediate | |
| A9 | Curved moons | Higher-order nonlinear | Expert | |
| A10 | Two islands | Implicit product | Expert |