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


5x5 Kurodoko | 7x7 Kurodoko | 10x10 Kurodoko | 15x15 Kurodoko | 20x20 Kurodoko

New Puzzle
This Month
1.numbrr
329
00:09.15
2.plang2008
64
00:10.06
3.nosleeplong
147
00:10.94
4.qobi
244
00:14.47
5.mbart
78
00:15.22
6.adminusff 00:15.36
7.Partimento
67
00:17.82
8.Dichterling
11
00:19.52
9.Rickieman86
21
00:20.92
10.Opie1234 00:21.92
11.Oryn
200
00:24.09
12.raelkid
111
00:24.23
13.NyoomCat 00:24.98
14.windex42
39
00:25.01
15.mts55
53
00:25.29
16.insanebrain 00:25.54
17.MacGamer
44
00:28.31
18.wu500 00:29.78
19.BlueOcarina
92
00:32.89
20.PeterP3
22
00:33.50
This Week
1.numbrr
329
00:09.15
2.adminusff 00:15.36
3.mbart
78
00:15.93
4.Partimento
67
00:17.82
5.Opie1234 00:23.77
6.raelkid
111
00:24.23
7.BlueOcarina
92
00:35.68
8.xiongan 00:38.27
9.iValerie
7
00:44.34
10.qobi
244
00:50.73
11.Efran
51
00:52.46
12.daspore 00:57.37
13.PeterP3
22
01:04.78
14.insanebrain 01:09.38
15.Virku 01:11.56
16.stevo 02:06.06
17.Uthor 13d 08:18:20.48
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1.numbrr
329
00:09.15
2.mbart
78
00:17.75
3.Opie1234 00:28.68
4.daspore 00:57.37
5.PeterP3
22
07:16.46
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1.numbrr
329
00:07.42
2.PuzzleMaestro
109
00:08.67
3.daanbe
244
00:09.57
4.hhhhhh2
159
00:10.65
5.Silkid
49
00:10.82
6.Oryn
200
00:11.22
7.Make
288
00:11.34
8.Meerkat
222
00:11.56
9.2015YINJ02
187
00:11.59
10.homeplus
64
00:12.04
AO5
1.numbrr
329
00:08.91
2.daanbe
244
00:09.76
3.PuzzleMaestro
109
00:09.87
4.Make
288
00:11.87
5.Oryn
200
00:12.02
6.Silkid
49
00:12.09
7.2015YINJ02
187
00:12.47
8.hhhhhh2
159
00:12.68
9.homeplus
64
00:12.84
10.jaybrainer
288
00:13.81
AO12
1.numbrr
329
00:11.19
2.daanbe
244
00:12.13
3.PuzzleMaestro
109
00:12.45
4.Make
288
00:15.29
5.Silkid
49
00:15.45
6.2015YINJ02
187
00:15.94
7.jaybrainer
288
00:16.64
8.hkjsf
162
00:16.91
9.Oryn
200
00:16.97
10.MoFan
120
00:17.56
Robots / programmatic solversinfo  
1.siebi
1
00:00.157
2.AutumnWind75
1
00:00.428
3.Paul Bismuth
1
00:01.055

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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