Arch Madness
May 2026
Set the grid size, paint green cells, and cycle arcs through white cells. Scores update live. puzzle rules ↗
Arc mode: each click cycles a cell empty → 4 arc orientations. Green cells can’t hold an arc.
Snapshots are kept in this browser. Export/Import moves a board as a file (backup or another machine).
Answer
(Σ row sums²) + (Σ col sums²)0
Regions area · smooth · score
Solver Mark ? cells, then press Solve ?
Nothing yet — mark cells to vary and press Solve ?.