Kabingurodo ("Curving Road") is a logic puzzle invented by Naoki Inaba (Japan). It consists of a grid, with circles in some cells. The aim is to blacken some cells of a grid according to the following rules:
- Cells with circles are always white.
- Black cells must not be orthogonally connected.
- All the white cells must form an orthogonally continuous area.
- Each path from one circle to another circle on white cells must turn at least two times.
Cross+A can solve puzzles from 3 x 3 to 30 x 30.