Kurodoko
Kurodoko also known as Kuromasu is a logic puzzle with simple rules and challenging solutions.
The rules are simple.
Shade some cells black guided by number clues.
- For each number, count visible white cells (including itself) in straight lines up/down/left/right, stopped by black cells or grid edges; total must match the number.
- Numbered cells remain white (unshaded).
- All unshaded cells form a single polyomino (all whites should be connected orthogonally in a single group).
- Black cells cannot touch horizontally or vertically (diagonals allowed).
Left click on a cell to make it black. Right click to mark with dot. Click and drag to mark more than one cell.
