Kurodoko


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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.

- Each number clue shows how many cells are "visible" from its place.
- "Visible" are all white cells up, down, left and right of the clue, terminated by a black cell or the grid edge. The cell with the number clue is also counted as visible.
- Other clue cells are considered transparent, so visibility continues through them.
- You can't shade clue cells black.
- All white cells must be connected orthogonally in a single group.
- Black cells can't touch orthogonally (diagonal touching is allowed).

Left click on a cell to make it black. Right click to mark with a dot. Click and drag to mark more than one cell.

Video Tutorial
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Kurodoko

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We are on a mission to make this website the largest collection of free, playable puzzles on the web. We are constantly adding new puzzle types, features, and improvements.

It is so exciting that you are interested in joining our community of puzzle-loving patrons! As a patron you will get some goodies in return (applies for all games):

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  • A tempting "Give Up" button will appear, which will test your resistance, and eventually show the puzzle solution if you happen to click on it.
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2026-03-01 03:50:09

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