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
00:17.33
2.gazil 00:22.81
3.nosleeplong
147
00:27.86
4.Silkid
49
00:30.18
5.adminusff 00:38.83
6.Rickieman86
21
00:41.82
7.Nieznany
17
00:45.98
8.nerdvert
106
00:52.29
9.shoner
7
00:52.69
10.Dorice
276
00:53.78
11.qobi
244
00:54.15
12.RelaxedCockatoo
67
00:59.14
13.ypw19
94
00:59.18
14.Partimento
67
00:59.21
15.daghan
34
01:02.94
16.mts55
53
01:12.67
17.raelkid
111
01:20.52
18.insanebrain 01:24.30
19.JustGeee 01:24.55
20.FunAcroFly
152
01:28.49
This Week
1.numbrr
329
00:17.33
2.adminusff 00:38.83
3.Nieznany
17
00:51.72
4.shoner
7
00:54.82
5.Partimento
67
00:59.21
6.Rickieman86
21
01:05.57
7.nerdvert
106
01:05.99
8.qobi
244
01:17.37
9.raelkid
111
01:20.52
10.insanebrain 01:24.30
11.FunAcroFly
152
01:28.49
12.Odenzon
45
01:29.61
13.JustGeee 01:33.74
14.vedpaliwal
67
01:35.98
15.daspore 01:37.35
16.BlueOcarina
92
02:06.55
17.Opie1234 02:16.15
18.super2276 04:28.20
19.Efran
51
06:17.72
20.Uthor 13d 08:16:36.23
Today
1.numbrr
329
00:17.33
2.shoner
7
00:54.82
3.Odenzon
45
01:29.61
4.daspore 01:37.35
5.super2276 04:28.20
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
00:22.04
2.PuzzleMaestro
109
00:24.78
3.daanbe
244
00:26.57
4.Fastfaxer
132
00:28.90
5.Make
288
00:32.40
6.Reenolex
48
00:33.44
7.2015YINJ02
187
00:34.23
8.Silkid
49
00:35.04
9.Meerkat
222
00:37.39
10.Alachas
47
00:41.66
AO5
1.numbrr
329
00:22.80
2.PuzzleMaestro
109
00:25.67
3.daanbe
244
00:30.55
4.Make
288
00:34.73
5.Fastfaxer
132
00:35.99
6.Silkid
49
00:36.51
7.Reenolex
48
00:36.62
8.2015YINJ02
187
00:37.22
9.Meerkat
222
00:44.16
10.SilverHawk
216
00:44.63
AO12
1.numbrr
329
00:28.28
2.PuzzleMaestro
109
00:31.59
3.daanbe
244
00:37.03
4.Reenolex
48
00:43.23
5.Silkid
49
00:43.65
6.Make
288
00:45.20
7.Fastfaxer
132
00:50.57
8.nosleeplong
147
00:54.77
9.Meerkat
222
00:55.16
10.2015YINJ02
187
00:55.32
Robots / programmatic solversinfo  
1.siebi
1
00:00.154
2.AutumnWind75
1
00:00.466
3.Paul Bismuth
1
00:01.604

* 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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