arc
A wall between you and a target. Choose an angle and a power and take the shot. The physics are deterministic, so the same aim always produces the same arc — the puzzle is reading the geometry, not fighting the controls.
How a round plays
One shot, over the wall.
- Drag to set the angle and the power.
- Release to fire and watch the trajectory play out.
- Adjust from where the last shot landed.
Scoring and fairness
What the grade is measuring.
The ◆ grade. Shots taken. A first-shot hit is the top grade.
Hints.Draws an aim line that is known to work. Using one keeps you off the ranked board for that day, so a hint can rescue a round but never buy a rank.
How the result is proved.Per-guess checks + win token. Every one of the ten games is verified server-side in one of three ways — a replayed move log, a server-graded answer, or per-guess checks that end in a signed win token — so the leaderboard only counts results the server could reconstruct for itself.
- Verification: Per-guess checks + win token
- Puzzle source: Procedural
- Typical round: 1–3 min
Where it comes from
A new one, every night.
Tomorrow's arc already exists. It was generated from a date seed, checked by a solver, and put in a queue that runs weeks ahead of today — so nothing ships the night it was made, and a bad batch never reaches a player.